replace github url

Breaks OIDC for some not yet updated applications, that we use.

This reverts commit c51628ea27.

.codecov/codecov.yml

@@ -1,4 +1,5 @@
 codecov:
+    branch: main
     notify:
       require_ci_to_pass: yes  
 coverage:
@@ -19,4 +20,7 @@ parsers:
 comment:
     layout: "header, diff"
     behavior: default
-    require_changes: no
+    require_changes: no
+ignore:
+  - "example"
+  - "**/mock"

.forgejo.bak/ISSUE_TEMPLATE/bug_report.yaml

@@ -0,0 +1,57 @@
+name: Bug Report
+description: "Create a bug report to help us improve ZITADEL. Click [here](https://github.com/zitadel/zitadel/blob/main/CONTRIBUTING.md#product-management) to see how we process your issue."
+title: "[Bug]: "
+labels: ["bug"]
+type: Bug
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for taking the time to fill out this bug report!
+  - type: checkboxes
+    id: preflight
+    attributes:
+      label: Preflight Checklist
+      options:
+      - label:
+          I could not find a solution in the documentation, the existing issues or discussions
+        required: true
+      - label:
+          I have joined the [ZITADEL chat](https://zitadel.com/chat)
+  - type: input
+    id: version
+    attributes:
+      label: Version
+      description: Which version of the OIDC library are you using.
+  - type: textarea
+    id: impact
+    attributes:
+      label: Describe the problem caused by this bug
+      description: A clear and concise description of the problem you have and what the bug is.
+    validations:
+      required: true
+  - type: textarea
+    id: reproduce
+    attributes:
+      label: To reproduce
+      description: Steps to reproduce the behaviour
+      placeholder: |
+        Steps to reproduce the behavior:
+    validations:
+      required: true
+  - type: textarea
+    id: screenshots
+    attributes:
+      label: Screenshots
+      description: If applicable, add screenshots to help explain your problem.
+  - type: textarea
+    id: expected
+    attributes:
+      label: Expected behavior
+      description: A clear and concise description of what you expected to happen.
+      placeholder: As a [type of user], I want [some goal] so that [some reason].
+  - type: textarea
+    id: additional
+    attributes:
+      label: Additional Context
+      description: Please add any other infos that could be useful.

.forgejo.bak/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1 @@
+blank_issues_enabled: true

.forgejo.bak/ISSUE_TEMPLATE/docs.yaml

@@ -0,0 +1,31 @@
+name: 📄 Documentation
+description: Create an issue for missing or wrong documentation.
+labels: ["docs"]
+type: task
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for taking the time to fill out this issue.
+  - type: checkboxes
+    id: preflight
+    attributes:
+      label: Preflight Checklist
+      options:
+      - label:
+          I could not find a solution in the existing issues, docs, nor discussions
+        required: true
+      - label:
+          I have joined the [ZITADEL chat](https://zitadel.com/chat)
+  - type: textarea
+    id: docs
+    attributes:
+      label: Describe the docs your are missing or that are wrong
+      placeholder: As a [type of user], I want [some goal] so that [some reason].
+    validations:
+      required: true
+  - type: textarea
+    id: additional
+    attributes:
+      label: Additional Context
+      description: Please add any other infos that could be useful.

.forgejo.bak/ISSUE_TEMPLATE/enhancement.yaml

@@ -0,0 +1,55 @@
+name: 🛠️ Improvement
+description: "Create an new issue for an improvment in ZITADEL"
+labels: ["enhancement"]
+type: enhancement
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for taking the time to fill out this proposal / feature reqeust
+  - type: checkboxes
+    id: preflight
+    attributes:
+      label: Preflight Checklist
+      options:
+      - label:
+          I could not find a solution in the existing issues, docs, nor discussions
+        required: true
+      - label:
+          I have joined the [ZITADEL chat](https://zitadel.com/chat)
+  - type: textarea
+    id: problem
+    attributes:
+      label: Describe your problem
+      description: Please describe your problem this improvement is supposed to solve.
+      placeholder: Describe the problem you have
+    validations:
+      required: true
+  - type: textarea
+    id: solution
+    attributes:
+      label: Describe your ideal solution
+      description: Which solution do you propose?
+      placeholder: As a [type of user], I want [some goal] so that [some reason].
+    validations:
+      required: true
+  - type: input
+    id: version
+    attributes:
+      label: Version
+      description: Which version of the OIDC Library are you using.
+  - type: dropdown
+    id: environment
+    attributes:
+      label: Environment
+      description: How do you use ZITADEL?
+      options:
+      - ZITADEL Cloud
+      - Self-hosted
+    validations:
+      required: true
+  - type: textarea
+    id: additional
+    attributes:
+      label: Additional Context
+      description: Please add any other infos that could be useful.

.forgejo.bak/dependabot.yml

@@ -0,0 +1,25 @@
+version: 2
+updates:
+- package-ecosystem: gomod
+  directory: "/"
+  schedule:
+    interval: daily
+    time: '04:00'
+  open-pull-requests-limit: 10
+  commit-message:
+    prefix: chore
+    include: scope
+- package-ecosystem: gomod
+  target-branch: "2.12.x"
+  directory: "/"
+  schedule:
+    interval: daily
+    time: '04:00'
+  open-pull-requests-limit: 10
+  commit-message:
+    prefix: chore
+    include: scope
+- package-ecosystem: "github-actions"
+  directory: "/"
+  schedule:
+    interval: weekly

.forgejo.bak/pull_request_template.md

@@ -0,0 +1,16 @@
+### Definition of Ready
+
+- [ ] I am happy with the code
+- [ ] Short description of the feature/issue is added in the pr description
+- [ ] PR is linked to the corresponding user story
+- [ ] Acceptance criteria are met
+- [ ] All open todos and follow ups are defined in a new ticket and justified
+- [ ] Deviations from the acceptance criteria and design are agreed with the PO and documented.
+- [ ] No debug or dead code
+- [ ] My code has no repetitions
+- [ ] Critical parts are tested automatically
+- [ ] Where possible E2E tests are implemented
+- [ ] Documentation/examples are up-to-date
+- [ ] All non-functional requirements are met
+- [ ] Functionality of the acceptance criteria is checked manually on the dev system.
+

.forgejo.bak/workflows/codeql-analysis.yml

@@ -2,10 +2,10 @@ name: "Code scanning - action"
 
 on:
   push:
-    branches: [master, ]
+    branches: [main,next]
   pull_request:
     # The branches below must be a subset of the branches above
-    branches: [master]
+    branches: [main,next]
   schedule:
     - cron: '0 11 * * 0'
 
@@ -16,7 +16,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
       with:
         # We must fetch at least the immediate parents so that if this is
         # a pull request then we can checkout the head.
@@ -29,7 +29,7 @@ jobs:
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
-      uses: github/codeql-action/init@v1
+      uses: github/codeql-action/init@v3
       # Override language selection by uncommenting this and choosing your languages
       with:
         languages: go
@@ -37,7 +37,7 @@ jobs:
     # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
     # If this step fails, then you should remove it and run the build manually (see below)
     - name: Autobuild
-      uses: github/codeql-action/autobuild@v1
+      uses: github/codeql-action/autobuild@v3
 
     # ℹ️ Command-line programs to run using the OS shell.
     # 📚 https://git.io/JvXDl
@@ -51,4 +51,4 @@ jobs:
     #   make release
 
     - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v1
+      uses: github/codeql-action/analyze@v3

.forgejo.bak/workflows/issue.yml

@@ -0,0 +1,43 @@
+name: Add new issues to product management project
+
+on:
+  issues:
+    types:
+      - opened
+  pull_request_target:
+    types:
+      - opened
+
+jobs:
+  add-to-project:
+    name: Add issue and community pr to project
+    runs-on: ubuntu-latest
+    steps:
+      - name: add issue
+        uses: actions/add-to-project@v1.0.2
+        if: ${{ github.event_name == 'issues' }}
+        with:
+          # You can target a repository in a different organization
+          # to the issue
+          project-url: https://github.com/orgs/zitadel/projects/2
+          github-token: ${{ secrets.ADD_TO_PROJECT_PAT }}
+      - uses: tspascoal/get-user-teams-membership@v3
+        id: checkUserMember
+        if: github.actor != 'dependabot[bot]'
+        with:
+         username: ${{ github.actor }}
+         GITHUB_TOKEN: ${{ secrets.ADD_TO_PROJECT_PAT }}
+      - name: add pr
+        uses: actions/add-to-project@v1.0.2
+        if: ${{ github.event_name == 'pull_request_target' && github.actor != 'dependabot[bot]' && !contains(steps.checkUserMember.outputs.teams, 'engineers')}}
+        with:
+          # You can target a repository in a different organization
+          # to the issue
+          project-url: https://github.com/orgs/zitadel/projects/2
+          github-token: ${{ secrets.ADD_TO_PROJECT_PAT }}
+      - uses: actions-ecosystem/action-add-labels@v1.1.3
+        if: ${{ github.event_name == 'pull_request_target' && github.actor != 'dependabot[bot]' && !contains(steps.checkUserMember.outputs.teams, 'staff')}}
+        with:
+          github_token: ${{ secrets.ADD_TO_PROJECT_PAT }}
+          labels: |
+            os-contribution

.forgejo.bak/workflows/release.yml

@@ -0,0 +1,49 @@
+name: Release
+on:
+  push:
+    branches:
+      - "2.11.x"
+      - main
+      - next
+    tags-ignore:
+      - '**'
+  pull_request:
+    branches:
+      - '**'
+  workflow_dispatch:
+
+jobs:
+  test:
+    runs-on: ubuntu-24.04
+    strategy:
+      fail-fast: false
+      matrix:
+        go: ['1.23', '1.24']
+    name: Go ${{ matrix.go }} test
+    steps:
+      - uses: actions/checkout@v4
+      - name: Setup go
+        uses: actions/setup-go@v5
+        with:
+          go-version: ${{ matrix.go }}
+      - run: go test -race -v -coverprofile=profile.cov -coverpkg=./pkg/... ./pkg/...
+      - uses: codecov/codecov-action@v5.4.3
+        with:
+          file: ./profile.cov
+          name: codecov-go
+  release:
+    runs-on: ubuntu-24.04
+    needs: [test]
+    if: ${{ github.event_name == 'workflow_dispatch' || github.ref == 'refs/heads/main' || github.ref == 'refs/heads/next' }}
+    env:
+      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+    steps:
+    - name: Source checkout
+      uses: actions/checkout@v4
+    - name: Semantic Release
+      uses: cycjimmy/semantic-release-action@v4
+      with:
+        dry_run: false
+        semantic_version: 18.0.1
+        extra_plugins: |
+          @semantic-release/exec@6.0.3

.github/dependabot.yml

@@ -1,11 +0,0 @@
-version: 2
-updates:
-- package-ecosystem: gomod
-  directory: "/"
-  schedule:
-    interval: daily
-    time: '04:00'
-  open-pull-requests-limit: 10
-  commit-message:
-    prefix: chore
-    include: scope

.github/workflows/release.yml

@@ -1,37 +0,0 @@
-name: Release
-on: push
-jobs:
-  test:
-    runs-on: ubuntu-18.04
-    strategy:
-      matrix:
-        go: ['1.14', '1.15']
-    name: Go ${{ matrix.go }} test
-    steps:
-      - uses: actions/checkout@v2
-      - name: Setup go
-        uses: actions/setup-go@v2-beta
-        with:
-          go-version: ${{ matrix.go }}
-      - run: go test -race -v -coverprofile=profile.cov ./pkg/...
-      - uses: codecov/codecov-action@v1
-        with:
-          file: ./profile.cov
-          name: codecov-go
-  release:
-    runs-on: ubuntu-18.04
-    needs: [test]
-    env:
-      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-    steps:
-    - name: Source checkout
-      uses: actions/checkout@v1
-      with:
-        fetch-depth: 1
-    - name: Semantic Release
-      uses: cycjimmy/semantic-release-action@v2
-      with:
-        dry_run: false
-        semantic_version: 17.0.4
-        extra_plugins: |
-          @semantic-release/exec@5.0.0

.releaserc.js

@@ -1,8 +1,12 @@
 module.exports = {
-    branch: 'master',
+    branches: [
+        {name: "2.11.x"},
+        {name: "main"},
+        {name: "next", prerelease: true},
+    ],
     plugins: [
         "@semantic-release/commit-analyzer",
         "@semantic-release/release-notes-generator",
         "@semantic-release/github"
     ]
-  };
+};

CODE_OF_CONDUCT.md

@@ -0,0 +1,128 @@
+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+We as members, contributors, and leaders pledge to make participation in our
+community a harassment-free experience for everyone, regardless of age, body
+size, visible or invisible disability, ethnicity, sex characteristics, gender
+identity and expression, level of experience, education, socio-economic status,
+nationality, personal appearance, race, religion, or sexual identity
+and orientation.
+
+We pledge to act and interact in ways that contribute to an open, welcoming,
+diverse, inclusive, and healthy community.
+
+## Our Standards
+
+Examples of behavior that contributes to a positive environment for our
+community include:
+
+* Demonstrating empathy and kindness toward other people
+* Being respectful of differing opinions, viewpoints, and experiences
+* Giving and gracefully accepting constructive feedback
+* Accepting responsibility and apologizing to those affected by our mistakes,
+  and learning from the experience
+* Focusing on what is best not just for us as individuals, but for the
+  overall community
+
+Examples of unacceptable behavior include:
+
+* The use of sexualized language or imagery, and sexual attention or
+  advances of any kind
+* Trolling, insulting or derogatory comments, and personal or political attacks
+* Public or private harassment
+* Publishing others' private information, such as a physical or email
+  address, without their explicit permission
+* Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+
+## Enforcement Responsibilities
+
+Community leaders are responsible for clarifying and enforcing our standards of
+acceptable behavior and will take appropriate and fair corrective action in
+response to any behavior that they deem inappropriate, threatening, offensive,
+or harmful.
+
+Community leaders have the right and responsibility to remove, edit, or reject
+comments, commits, code, wiki edits, issues, and other contributions that are
+not aligned to this Code of Conduct, and will communicate reasons for moderation
+decisions when appropriate.
+
+## Scope
+
+This Code of Conduct applies within all community spaces, and also applies when
+an individual is officially representing the community in public spaces.
+Examples of representing our community include using an official e-mail address,
+posting via an official social media account, or acting as an appointed
+representative at an online or offline event.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported to the community leaders responsible for enforcement at
+abuse@zitadel.ch.
+All complaints will be reviewed and investigated promptly and fairly.
+
+All community leaders are obligated to respect the privacy and security of the
+reporter of any incident.
+
+## Enforcement Guidelines
+
+Community leaders will follow these Community Impact Guidelines in determining
+the consequences for any action they deem in violation of this Code of Conduct:
+
+### 1. Correction
+
+**Community Impact**: Use of inappropriate language or other behavior deemed
+unprofessional or unwelcome in the community.
+
+**Consequence**: A private, written warning from community leaders, providing
+clarity around the nature of the violation and an explanation of why the
+behavior was inappropriate. A public apology may be requested.
+
+### 2. Warning
+
+**Community Impact**: A violation through a single incident or series
+of actions.
+
+**Consequence**: A warning with consequences for continued behavior. No
+interaction with the people involved, including unsolicited interaction with
+those enforcing the Code of Conduct, for a specified period of time. This
+includes avoiding interactions in community spaces as well as external channels
+like social media. Violating these terms may lead to a temporary or
+permanent ban.
+
+### 3. Temporary Ban
+
+**Community Impact**: A serious violation of community standards, including
+sustained inappropriate behavior.
+
+**Consequence**: A temporary ban from any sort of interaction or public
+communication with the community for a specified period of time. No public or
+private interaction with the people involved, including unsolicited interaction
+with those enforcing the Code of Conduct, is allowed during this period.
+Violating these terms may lead to a permanent ban.
+
+### 4. Permanent Ban
+
+**Community Impact**: Demonstrating a pattern of violation of community
+standards, including sustained inappropriate behavior,  harassment of an
+individual, or aggression toward or disparagement of classes of individuals.
+
+**Consequence**: A permanent ban from any sort of public interaction within
+the community.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage],
+version 2.0, available at
+https://www.contributor-covenant.org/version/2/0/code_of_conduct.html.
+
+Community Impact Guidelines were inspired by [Mozilla's code of conduct
+enforcement ladder](https://github.com/mozilla/diversity).
+
+[homepage]: https://www.contributor-covenant.org
+
+For answers to common questions about this code of conduct, see the FAQ at
+https://www.contributor-covenant.org/faq. Translations are available at
+https://www.contributor-covenant.org/translations.

CONTRIBUTING.md

@@ -0,0 +1,40 @@
+# How to contribute to the OIDC SDK for Go
+
+## Did you find a bug?
+
+Please file an issue [here](https://github.com/zitadel/oidc/issues/new?assignees=&labels=bug&template=bug_report.md&title=).
+
+Bugs are evaluated every day as soon as possible.
+
+## Enhancement
+
+Do you miss a feature? Please file an issue [here](https://github.com/zitadel/oidc/issues/new?assignees=&labels=enhancement&template=feature_request.md&title=)
+
+Enhancements are discussed and evaluated every Wednesday by the ZITADEL core team.
+
+## Grab an Issues
+
+We add the label "good first issue" for problems we think are a good starting point to contribute to the OIDC SDK.
+
+* [Issues for first time contributors](https://github.com/zitadel/oidc/issues?q=is%3Aissue+is%3Aopen+label%3A%22good+first+issue%22)
+* [All issues](https://github.com/zitadel/oidc/issues)
+
+### Make a PR
+
+If you like to contribute fork the OIDC repository. After you implemented the new feature create a PullRequest in the OIDC reposiotry.
+
+Make sure you use semantic release:
+
+* feat: New Feature
+* fix: Bug Fix
+* docs: Documentation
+
+## Want to use the library?
+
+Checkout the [examples folder](example) for different client and server implementations.
+
+Or checkout how we use it ourselves in our OpenSource Identity and Access Management [ZITADEL](https://github.com/zitadel/zitadel).
+
+## **Did you find a security flaw?**
+
+* Please read [Security Policy](SECURITY.md).

NOTICE

@@ -0,0 +1 @@
+Copyright The zitadel/oidc Contributors

README.md

@@ -1,57 +1,192 @@
 # OpenID Connect SDK (client and server) for Go
 
 [![semantic-release](https://img.shields.io/badge/%20%20%F0%9F%93%A6%F0%9F%9A%80-semantic--release-e10079.svg)](https://github.com/semantic-release/semantic-release)
-[![Release](https://github.com/caos/oidc/workflows/Release/badge.svg)](https://github.com/caos/oidc/actions)
-[![license](https://badgen.net/github/license/caos/oidc/)](https://github.com/caos/oidc/blob/master/LICENSE)
-[![release](https://badgen.net/github/release/caos/oidc/stable)](https://github.com/caos/oidc/releases)
-[![Go Report Card](https://goreportcard.com/badge/github.com/caos/oidc)](https://goreportcard.com/report/github.com/caos/oidc)
-[![codecov](https://codecov.io/gh/caos/oidc/branch/master/graph/badge.svg)](https://codecov.io/gh/caos/oidc)
+[![Release](https://github.com/zitadel/oidc/workflows/Release/badge.svg)](https://github.com/zitadel/oidc/actions)
+[![Go Reference](https://pkg.go.dev/badge/github.com/zitadel/oidc/v3.svg)](https://pkg.go.dev/github.com/zitadel/oidc/v3)
+[![license](https://badgen.net/github/license/zitadel/oidc/)](https://github.com/zitadel/oidc/blob/master/LICENSE)
+[![release](https://badgen.net/github/release/zitadel/oidc/stable)](https://github.com/zitadel/oidc/releases)
+[![Go Report Card](https://goreportcard.com/badge/github.com/zitadel/oidc/v3)](https://goreportcard.com/report/github.com/zitadel/oidc/v3)
+[![codecov](https://codecov.io/gh/zitadel/oidc/branch/main/graph/badge.svg)](https://codecov.io/gh/zitadel/oidc)
 
-> This project is in alpha state. It can AND will continue breaking until version 1.0.0 is released
+[![openid_certified](https://cloud.githubusercontent.com/assets/1454075/7611268/4d19de32-f97b-11e4-895b-31b2455a7ca6.png)](https://openid.net/certification/)
 
 ## What Is It
 
-This project is a easy to use client and server implementation for the `OIDC` (Open ID Connect) standard written for `Go`. 
+This project is an easy-to-use client (RP) and server (OP) implementation for the `OIDC` (OpenID Connect) standard written for `Go`.
+
+The RP is certified for the [basic](https://www.certification.openid.net/plan-detail.html?public=true&plan=uoprP0OO8Z4Qo) and [config](https://www.certification.openid.net/plan-detail.html?public=true&plan=AYSdLbzmWbu9X) profile.
 
 Whenever possible we tried to reuse / extend existing packages like `OAuth2 for Go`.
 
+## Basic Overview
+
+The most important packages of the library:
+
+<pre>
+/pkg
+    /client            clients using the OP for retrieving, exchanging and verifying tokens
+        /rp            definition and implementation of an OIDC Relying Party (client)
+        /rs            definition and implementation of an OAuth Resource Server (API)
+    /op                definition and implementation of an OIDC OpenID Provider (server)
+    /oidc              definitions shared by clients and server
+
+/example
+    /client/api        example of an api / resource server implementation using token introspection
+    /client/app        web app / RP demonstrating authorization code flow using various authentication methods (code, PKCE, JWT profile)
+    /client/github     example of the extended OAuth2 library, providing an HTTP client with a reuse token source
+    /client/service    demonstration of JWT Profile Authorization Grant
+    /server            examples of an OpenID Provider implementations (including dynamic) with some very basic login UI
+</pre>
+
+### Semver
+
+This package uses [semver](https://semver.org/) for [releases](https://github.com/zitadel/oidc/releases). Major releases ship breaking changes. Starting with the `v2` to `v3` increment we provide an [upgrade guide](UPGRADING.md) to ease migration to a newer version.
+
 ## How To Use It
 
-TBD
+Check the `/example` folder where example code for different scenarios is located.
+
+```bash
+# start oidc op server
+# oidc discovery http://localhost:9998/.well-known/openid-configuration
+go run github.com/zitadel/oidc/v3/example/server
+# start oidc web client (in a new terminal)
+CLIENT_ID=web CLIENT_SECRET=secret ISSUER=http://localhost:9998/ SCOPES="openid profile" PORT=9999 go run github.com/zitadel/oidc/v3/example/client/app
+```
+
+- open http://localhost:9999/login in your browser
+- you will be redirected to op server and the login UI
+- login with user `test-user@localhost` and password `verysecure`
+- the OP will redirect you to the client app, which displays the user info
+
+for the dynamic issuer, just start it with:
+
+```bash
+go run github.com/zitadel/oidc/v3/example/server/dynamic
+```
+
+the oidc web client above will still work, but if you add `oidc.local` (pointing to 127.0.0.1) in your hosts file you can also start it with:
+
+```bash
+CLIENT_ID=web CLIENT_SECRET=secret ISSUER=http://oidc.local:9998/ SCOPES="openid profile" PORT=9999 go run github.com/zitadel/oidc/v3/example/client/app
+```
+
+> Note: Usernames are suffixed with the hostname (`test-user@localhost` or `test-user@oidc.local`)
+
+### Server configuration
+
+Example server allows extra configuration using environment variables and could be used for end to
+end testing of your services.
+
+| Name         | Format                           | Description                           |
+| ------------ | -------------------------------- | ------------------------------------- |
+| PORT         | Number between 1 and 65535       | OIDC listen port                      |
+| REDIRECT_URI | Comma-separated URIs             | List of allowed redirect URIs         |
+| USERS_FILE   | Path to json in local filesystem | Users with their data and credentials |
+
+Here is json equivalent for one of the default users
+
+```json
+{
+  "id2": {
+    "ID": "id2",
+    "Username": "test-user2",
+    "Password": "verysecure",
+    "FirstName": "Test",
+    "LastName": "User2",
+    "Email": "test-user2@zitadel.ch",
+    "EmailVerified": true,
+    "Phone": "",
+    "PhoneVerified": false,
+    "PreferredLanguage": "DE",
+    "IsAdmin": false
+  }
+}
+```
 
 ## Features
 
-|                | Code Flow | Implicit Flow | Hybrid Flow | Discovery | PKCE | Token Exchange | mTLS    | JWT Profile |
-|----------------|-----------|---------------|-------------|-----------|------|----------------|---------|-------------|
-| Relaying Party | yes       | yes           | not yet     | yes       | yes  | partial        | not yet | yes         |
-| Origin Party   | yes       | yes           | not yet     | yes       | yes  | not yet        | not yet | yes         |
+|                      | Relying party | OpenID Provider | Specification                                |
+| -------------------- | ------------- | --------------- | -------------------------------------------- |
+| Code Flow            | yes           | yes             | OpenID Connect Core 1.0, [Section 3.1][1]    |
+| Implicit Flow        | no[^1]        | yes             | OpenID Connect Core 1.0, [Section 3.2][2]    |
+| Hybrid Flow          | no            | not yet         | OpenID Connect Core 1.0, [Section 3.3][3]    |
+| Client Credentials   | yes           | yes             | OpenID Connect Core 1.0, [Section 9][4]      |
+| Refresh Token        | yes           | yes             | OpenID Connect Core 1.0, [Section 12][5]     |
+| Discovery            | yes           | yes             | OpenID Connect [Discovery][6] 1.0            |
+| JWT Profile          | yes           | yes             | [RFC 7523][7]                                |
+| PKCE                 | yes           | yes             | [RFC 7636][8]                                |
+| Token Exchange       | yes           | yes             | [RFC 8693][9]                                |
+| Device Authorization | yes           | yes             | [RFC 8628][10]                               |
+| mTLS                 | not yet       | not yet         | [RFC 8705][11]                               |
+| Back-Channel Logout  | not yet       | yes             | OpenID Connect [Back-Channel Logout][12] 1.0 |
+
+[1]: https://openid.net/specs/openid-connect-core-1_0.html#CodeFlowAuth "3.1. Authentication using the Authorization Code Flow"
+[2]: https://openid.net/specs/openid-connect-core-1_0.html#ImplicitFlowAuth "3.2. Authentication using the Implicit Flow"
+[3]: https://openid.net/specs/openid-connect-core-1_0.html#HybridFlowAuth "3.3. Authentication using the Hybrid Flow"
+[4]: https://openid.net/specs/openid-connect-core-1_0.html#ClientAuthentication "9. Client Authentication"
+[5]: https://openid.net/specs/openid-connect-core-1_0.html#RefreshTokens "12. Using Refresh Tokens"
+[6]: https://openid.net/specs/openid-connect-discovery-1_0.html "OpenID Connect Discovery 1.0 incorporating errata set 1"
+[7]: https://www.rfc-editor.org/rfc/rfc7523.html "JSON Web Token (JWT) Profile for OAuth 2.0 Client Authentication and Authorization Grants"
+[8]: https://www.rfc-editor.org/rfc/rfc7636.html "Proof Key for Code Exchange by OAuth Public Clients"
+[9]: https://www.rfc-editor.org/rfc/rfc8693.html "OAuth 2.0 Token Exchange"
+[10]: https://www.rfc-editor.org/rfc/rfc8628.html "OAuth 2.0 Device Authorization Grant"
+[11]: https://www.rfc-editor.org/rfc/rfc8705.html "OAuth 2.0 Mutual-TLS Client Authentication and Certificate-Bound Access Tokens"
+[12]: https://openid.net/specs/openid-connect-backchannel-1_0.html "OpenID Connect Back-Channel Logout 1.0 incorporating errata set 1"
+
+## Contributors
+
+<a href="https://github.com/zitadel/oidc/graphs/contributors">
+  <img src="https://contrib.rocks/image?repo=zitadel/oidc" alt="Screen with contributors' avatars from contrib.rocks" />
+</a>
+
+Made with [contrib.rocks](https://contrib.rocks).
 
 ### Resources
 
-For your convinience you can find the relevant standards linked below.
+For your convenience you can find the relevant guides linked below.
 
 - [OpenID Connect Core 1.0 incorporating errata set 1](https://openid.net/specs/openid-connect-core-1_0.html)
-- [Proof Key for Code Exchange by OAuth Public Clients](https://tools.ietf.org/html/rfc7636)
-- [OAuth 2.0 Token Exchange](https://tools.ietf.org/html/draft-ietf-oauth-token-exchange-19)
-- [OAuth 2.0 Mutual-TLS Client Authentication and Certificate-Bound Access Tokens](https://tools.ietf.org/html/draft-ietf-oauth-mtls-17)
-- [JSON Web Token (JWT) Profile for OAuth 2.0 Client Authentication and Authorization Grants](https://tools.ietf.org/html/rfc7523)
+- [OIDC/OAuth Flow in Zitadel (using this library)](https://zitadel.com/docs/guides/integrate/login-users)
 
 ## Supported Go Versions
 
+For security reasons, we only support and recommend the use of one of the latest two Go versions (:white_check_mark:).
+Versions that also build are marked with :warning:.
+
 | Version | Supported          |
-|---------|--------------------|
-| <1.13   | :x:                |
-| 1.14    | :white_check_mark: |
-| 1.15    | :white_check_mark: |
+| ------- | ------------------ |
+| <1.23   | :x:                |
+| 1.23    | :white_check_mark: |
+| 1.24    | :white_check_mark: |
 
 ## Why another library
 
-As of 2020 there are not a lot of `OIDC` librarys in `Go` which can handle server and client implementations. CAOS is strongly commited to the general field of IAM (Identity and Access Management) and as such, we need solid frameworks to implement services.
+As of 2020 there are not a lot of `OIDC` library's in `Go` which can handle server and client implementations. ZITADEL is strongly committed to the general field of IAM (Identity and Access Management) and as such, we need solid frameworks to implement services.
+
+### Goals
+
+- [Certify this library as OP](https://openid.net/certification/#OPs)
+
+### Other Go OpenID Connect libraries
+
+[https://github.com/coreos/go-oidc](https://github.com/coreos/go-oidc)
+
+The `go-oidc` does only support `RP` and is not feasible to use as `OP` that's why we could not rely on `go-oidc`
+
+[https://github.com/ory/fosite](https://github.com/ory/fosite)
+
+We did not choose `fosite` because it implements `OAuth 2.0` on its own and does not rely on the golang provided package. Nonetheless this is a great project.
 
 ## License
 
-The full functionality of this library is and stays open source and free to use for everyone. Visit our [website](https://caos.ch) and get in touch.
+The full functionality of this library is and stays open source and free to use for everyone. Visit
+our [website](https://zitadel.com) and get in touch.
 
-See the exact licensing terms [here](./LICENSE)
+See the exact licensing terms [here](LICENSE)
 
-Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
+Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "
+AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific
+language governing permissions and limitations under the License.
+
+[^1]: https://github.com/zitadel/oidc/issues/135#issuecomment-950563892

SECURITY.md

@@ -1,42 +1,20 @@
 # Security Policy
 
-At CAOS we are extremely grateful for security aware people that disclose vulnerabilities to us and the open source community. All reports will be investigated by our team.
+Please refer to the security policy [on zitadel/zitadel](https://github.com/zitadel/zitadel/blob/main/SECURITY.md) which is applicable for all open source repositories of our organization.
 
 ## Supported Versions
 
-After the initial Release the following version support will apply
+We currently support the following version of the OIDC framework:
 
-| Version | Supported                               |
-| ------- | ------------------                      |
-| 1.x.x   | :white_check_mark: (not yet available)  |
-| 0.x.x   | :x:                                     |
+| Version  | Supported          | Branch      | Details                              |
+| -------- | ------------------ | ----------- | ------------------------------------ |
+| 0.x.x    | :x:                |             | not maintained                       |
+| <2.11    | :x:                |             | not maintained                       |
+| 2.11.x   | :lock: :warning:   | [2.11.x][1] | security only, [community effort][2] |
+| 3.x.x    | :heavy_check_mark: | [main][3]   | supported                            |
+| 4.0.0-xx | :white_check_mark: | [next][4]   | [development branch]                 |
 
-## Reporting a vulnerability
-
-To file a incident, please disclose by email to security@caos.ch with the security details.
-
-At the moment GPG encryption is no yet supported, however you may sign your message at will.
-
-### When should I report a vulnerability
-
-* You think you discovered a ...
-  * ... potential security vulnerability in the SDK
-  * ... vulnerability in another project that this SDK bases on
-* For projects with their own vulnerability reporting and disclosure process, please report it directly there
-
-### When should I NOT report a vulnerability
-
-* You need help applying security related updates
-* Your issue is not security related
-
-## Security Vulnerability Response
-
-TBD
-
-## Public Disclosure
-
-All accepted and mitigated vulnerabilitys will be published on the [Github Security Page](https://github.com/caos/oidc/security/advisories)
-
-### Timing
-
-We think it is crucial to publish advisories `ASAP` as mitigations are ready. But due to the unknown nature of the discloures the time frame can range from 7 to 90 days.
+[1]: https://github.com/zitadel/oidc/tree/2.11.x
+[2]: https://github.com/zitadel/oidc/discussions/458
+[3]: https://github.com/zitadel/oidc/tree/main
+[4]: https://github.com/zitadel/oidc/tree/next

UPGRADING.md

@@ -0,0 +1,370 @@
+# Upgrading
+
+All commands are executed from the root of the project that imports oidc packages.
+`sed` commands are created with **GNU sed** in mind and might need alternate syntax
+on non-GNU systems, such as MacOS.
+Alternatively, GNU sed can be installed on such systems. (`coreutils` package?).
+
+## V2 to V3
+
+**TL;DR** at the [bottom](#full-script) of this chapter is a full `sed` script
+containing all automatic steps at once.
+
+
+As first steps we will:
+1. Download the latest v3 module;
+2. Replace imports in all Go files;
+3. Tidy the module file;
+
+```bash
+go get -u github.com/zitadel/oidc/v3
+find . -type f -name '*.go' | xargs sed -i \
+    -e 's/github\.com\/zitadel\/oidc\/v2/github.com\/zitadel\/oidc\/v3/g'
+go mod tidy
+```
+
+### global
+
+#### go-jose package
+
+`gopkg.in/square/go-jose.v2` import has been changed to `github.com/go-jose/go-jose/v3`.
+That means that the imported types are also changed and imports need to be adapted.
+
+```bash
+find . -type f -name '*.go' | xargs sed -i \
+    -e 's/gopkg.in\/square\/go-jose\.v2/github.com\/go-jose\/go-jose\/v3/g'
+go mod tidy
+```
+
+### op
+
+```go
+import "github.com/zitadel/oidc/v3/pkg/op"
+```
+
+#### Logger
+
+This version of OIDC adds logging to the framework. For this we use the new Go standard library `log/slog`. (Until v3.12.0 we used `x/exp/slog`).
+Mostly OIDC will use error level logs where it's returning an error through a HTTP handler. OIDC errors that are user facing don't carry much context, also for security reasons. With logging we are now able to print the error context, so that developers can more easily find the source of their issues. Previously we just discarded such context.
+
+Most users of the OP package with the storage interface will not experience breaking changes. However if you use `RequestError()` directly in your code, you now need to give it a `Logger` as final argument.
+
+The `OpenIDProvider` and sub-interfaces like `Authorizer` and `Exchanger` got a `Logger()` method to return the configured logger. This logger is in turn used by `AuthRequestError()`. You configure the logger with the `WithLogger()` for the `Provider`. By default the `slog.Default()` is used.
+
+We also provide a new optional interface: [`LogAuthRequest`](https://pkg.go.dev/github.com/zitadel/oidc/v3/pkg/op#LogAuthRequest). If an `AuthRequest` implements this interface, it is completely passed into the logger after an error. Its `LogValue()` will be used by `slog` to print desired fields. This allows omitting sensitive fields you wish not no print. If the interface is not implemented, no `AuthRequest` details will ever be printed.
+
+#### Server interface
+
+We've added a new [`Server`](https://pkg.go.dev/github.com/zitadel/oidc/v3/pkg/op#Server) interface. This interface is experimental and subject to change. See [issue 440](https://github.com/zitadel/oidc/issues/440) for the motivation and discussion around this new interface.
+Usage of the new interface is not required, but may be used for advanced scenarios when working with the `Storage` interface isn't the optimal solution for your app (like we experienced in [Zitadel](https://github.com/zitadel/zitadel)).
+
+#### AuthRequestError
+
+`AuthRequestError` now takes the complete `Authorizer` as final argument, instead of only the encoder.
+This is to facilitate the use of the `Logger` as described above.
+
+```bash
+find . -type f -name '*.go' | xargs sed -i \
+    -e 's/\bAuthRequestError(w, r, authReq, err, authorizer.Encoder())/AuthRequestError(w, r, authReq, err, authorizer)/g'
+```
+
+Note: the sed regex might not find all uses if the local variables of the passed arguments use different names.
+
+#### AccessTokenVerifier
+
+`AccessTokenVerifier` interface has become a struct type. `NewAccessTokenVerifier` now returns a pointer to `AccessTokenVerifier`.
+Variable and struct fields declarations need to be changed from `op.AccessTokenVerifier` to `*op.AccessTokenVerifier`.
+
+```bash
+find . -type f -name '*.go' | xargs sed -i \
+    -e 's/\bop\.AccessTokenVerifier\b/*op.AccessTokenVerifier/g'
+```
+
+#### JWTProfileVerifier
+
+`JWTProfileVerifier` interface has become a struct type. `NewJWTProfileVerifier` now returns a pointer to `JWTProfileVerifier`.
+Variable and struct fields declarations need to be changed from `op.JWTProfileVerifier` to `*op.JWTProfileVerifier`.
+
+```bash
+find . -type f -name '*.go' | xargs sed -i \
+    -e 's/\bop\.JWTProfileVerifier\b/*op.JWTProfileVerifier/g'
+```
+
+#### IDTokenHintVerifier
+
+`IDTokenHintVerifier` interface has become a struct type. `NewIDTokenHintVerifier` now returns a pointer to `IDTokenHintVerifier`.
+Variable and struct fields declarations need to be changed from `op.IDTokenHintVerifier` to `*op.IDTokenHintVerifier`.
+
+```bash
+find . -type f -name '*.go' | xargs sed -i \
+    -e 's/\bop\.IDTokenHintVerifier\b/*op.IDTokenHintVerifier/g'
+```
+
+#### ParseRequestObject
+
+`ParseRequestObject` no longer returns `*oidc.AuthRequest` as it already operates on the pointer for the passed `authReq` argument. As such the argument and the return value were the same pointer. Callers can just use the original `*oidc.AuthRequest` now.
+
+#### Endpoint Configuration
+
+`Endpoint`s returned from `Configuration` interface methods are now pointers. Usually, `op.Provider` is the main implementation of the `Configuration` interface. However, if a custom implementation is used, you should be able to update it using the following:
+
+```bash
+find . -type f -name '*.go' | xargs sed -i \
+    -e 's/AuthorizationEndpoint() Endpoint/AuthorizationEndpoint() *Endpoint/g' \
+    -e 's/TokenEndpoint() Endpoint/TokenEndpoint() *Endpoint/g' \
+    -e 's/IntrospectionEndpoint() Endpoint/IntrospectionEndpoint() *Endpoint/g' \
+    -e 's/UserinfoEndpoint() Endpoint/UserinfoEndpoint() *Endpoint/g' \
+    -e 's/RevocationEndpoint() Endpoint/RevocationEndpoint() *Endpoint/g' \
+    -e 's/EndSessionEndpoint() Endpoint/EndSessionEndpoint() *Endpoint/g' \
+    -e 's/KeysEndpoint() Endpoint/KeysEndpoint() *Endpoint/g' \
+    -e 's/DeviceAuthorizationEndpoint() Endpoint/DeviceAuthorizationEndpoint() *Endpoint/g'
+```
+
+#### CreateDiscoveryConfig
+
+`CreateDiscoveryConfig` now takes a context as first argument. The following adds `context.TODO()` to the function:
+
+```bash
+find . -type f -name '*.go' | xargs sed -i \
+    -e 's/op\.CreateDiscoveryConfig(/op.CreateDiscoveryConfig(context.TODO(), /g'
+```
+
+It now takes the issuer out of the context using the [`IssuerFromContext`](https://pkg.go.dev/github.com/zitadel/oidc/v3/pkg/op#IssuerFromContext) functionality,
+instead of the `config.IssuerFromRequest()` method.
+
+#### CreateRouter
+
+`CreateRouter` now returns a `chi.Router` instead of `*mux.Router`.
+Usually this function is called when the Provider is constructed and not by package consumers.
+However if your project does call this function directly, manual update of the code is required.
+
+#### DeviceAuthorizationStorage
+
+`DeviceAuthorizationStorage` dropped the following methods:
+
+- `GetDeviceAuthorizationByUserCode`
+- `CompleteDeviceAuthorization`
+- `DenyDeviceAuthorization`
+
+These methods proved not to be required from a library point of view.
+Implementations of a device authorization flow may take care of these calls in a way they see fit.
+
+#### AuthorizeCodeChallenge
+
+The `AuthorizeCodeChallenge` function now only takes the `CodeVerifier` argument, instead of the complete `*oidc.AccessTokenRequest`.
+
+```bash
+find . -type f -name '*.go' | xargs sed -i \
+    -e 's/op\.AuthorizeCodeChallenge(tokenReq/op.AuthorizeCodeChallenge(tokenReq.CodeVerifier/g'
+```
+
+### client
+
+```go
+import "github.com/zitadel/oidc/v3/pkg/client"
+```
+
+#### Context
+
+All client calls now take a context as first argument. The following adds `context.TODO()` to all the affected functions:
+
+```bash
+find . -type f -name '*.go' | xargs sed -i \
+    -e 's/client\.Discover(/client.Discover(context.TODO(), /g' \
+    -e 's/client\.CallTokenEndpoint(/client.CallTokenEndpoint(context.TODO(), /g' \
+    -e 's/client\.CallEndSessionEndpoint(/client.CallEndSessionEndpoint(context.TODO(), /g' \
+    -e 's/client\.CallRevokeEndpoint(/client.CallRevokeEndpoint(context.TODO(), /g' \
+    -e 's/client\.CallTokenExchangeEndpoint(/client.CallTokenExchangeEndpoint(context.TODO(), /g' \
+    -e 's/client\.CallDeviceAuthorizationEndpoint(/client.CallDeviceAuthorizationEndpoint(context.TODO(), /g' \
+    -e 's/client\.JWTProfileExchange(/client.JWTProfileExchange(context.TODO(), /g'
+```
+
+#### keyFile type
+
+The `keyFile` struct type is now exported a `KeyFile` and returned by the `ConfigFromKeyFile` and `ConfigFromKeyFileData`. No changes are needed on the caller's side.
+
+### client/profile
+
+The package now defines a new interface `TokenSource` which compliments the `oauth2.TokenSource` with a `TokenCtx` method, so that a context can be explicitly added on each call. Users can migrate to the new method when they whish.
+
+`NewJWTProfileTokenSource` now takes a context as first argument, so do the related `NewJWTProfileTokenSourceFromKeyFile` and `NewJWTProfileTokenSourceFromKeyFileData`. The context is used for the Discovery request.
+
+```bash
+find . -type f -name '*.go' | xargs sed -i \
+    -e 's/profile\.NewJWTProfileTokenSource(/profile.NewJWTProfileTokenSource(context.TODO(), /g' \
+    -e 's/profile\.NewJWTProfileTokenSourceFromKeyFileData(/profile.NewJWTProfileTokenSourceFromKeyFileData(context.TODO(), /g' \
+    -e 's/profile\.NewJWTProfileTokenSourceFromKeyFile(/profile.NewJWTProfileTokenSourceFromKeyFile(context.TODO(), /g'
+```
+
+
+### client/rp
+
+```go
+import "github.com/zitadel/oidc/v3/pkg/client/rs"
+```
+
+#### Discover
+
+The `Discover` function has been removed. Use `client.Discover` instead.
+
+#### Context
+
+Most `rp` functions now require a context as first argument. The following adds `context.TODO()` to the function that have no additional changes. Functions with more complex changes are documented below.
+
+```bash
+find . -type f -name '*.go' | xargs sed -i \
+    -e 's/rp\.NewRelyingPartyOIDC(/rp.NewRelyingPartyOIDC(context.TODO(), /g' \
+    -e 's/rp\.EndSession(/rp.EndSession(context.TODO(), /g' \
+    -e 's/rp\.RevokeToken(/rp.RevokeToken(context.TODO(), /g' \
+    -e 's/rp\.DeviceAuthorization(/rp.DeviceAuthorization(context.TODO(), /g'
+```
+
+Remember to replace `context.TODO()` with a context that is applicable for your app, where possible.
+
+#### RefreshAccessToken
+
+1. Renamed to `RefreshTokens`;
+2. A context must be passed;
+3. An `*oidc.Tokens` object is now returned, which included an ID Token if it was returned by the server;
+4. The function is now generic and requires a type argument for the `IDTokenClaims` implementation inside the returned `oidc.Tokens` object;
+
+For most use cases `*oidc.IDTokenClaims` can be used as type argument. A custom implementation of `oidc.IDClaims` can be used if type-safe access to custom claims is required.
+
+```bash
+find . -type f -name '*.go' | xargs sed -i \
+    -e 's/rp\.RefreshAccessToken(/rp.RefreshTokens[*oidc.IDTokenClaims](context.TODO(), /g'
+```
+
+Users that called `tokens.Extra("id_token").(string)` and a subsequent `VerifyTokens` to get the claims, no longer need to do this. The ID token is verified (when present) by `RefreshTokens` already.
+
+
+#### Userinfo
+
+1. A context must be passed as first argument;
+2. The function is now generic and requires a type argument for the returned user info object;
+
+For most use cases `*oidc.UserInfo` can be used a type argument. A [custom implementation](https://pkg.go.dev/github.com/zitadel/oidc/v3/pkg/client/rp#example-Userinfo-Custom) of `rp.SubjectGetter` can be used if type-safe access to custom claims is required.
+
+```bash
+find . -type f -name '*.go' | xargs sed -i \
+    -e 's/rp\.Userinfo(/rp.Userinfo[*oidc.UserInfo](context.TODO(), /g'
+```
+
+#### UserinfoCallback
+
+`UserinfoCallback` has an additional type argument fot the `UserInfo` object. Typically the type argument can be inferred by the compiler, by the function that is passed. The actual code update cannot be done by a simple `sed` script and depends on how the caller implemented the function.
+
+
+#### IDTokenVerifier
+
+`IDTokenVerifier` interface has become a struct type. `NewIDTokenVerifier` now returns a pointer to `IDTokenVerifier`.
+Variable and struct fields declarations need to be changed from `rp.IDTokenVerifier` to `*rp.AccessTokenVerifier`.
+
+```bash
+find . -type f -name '*.go' | xargs sed -i \
+    -e 's/\brp\.IDTokenVerifier\b/*rp.IDTokenVerifier/g'
+```
+
+### client/rs
+
+```go
+import "github.com/zitadel/oidc/v3/pkg/client/rs"
+```
+
+#### NewResourceServer
+
+The `NewResourceServerClientCredentials` and `NewResourceServerJWTProfile` constructor functions now take a context as first argument.
+
+```bash
+find . -type f -name '*.go' | xargs sed -i \
+    -e 's/rs\.NewResourceServerClientCredentials(/rs.NewResourceServerClientCredentials(context.TODO(), /g' \
+    -e 's/rs\.NewResourceServerJWTProfile(/rs.NewResourceServerJWTProfile(context.TODO(), /g'
+```
+
+#### Introspect
+
+`Introspect` is now generic and requires a type argument for the returned introspection response. For most use cases `*oidc.IntrospectionResponse` can be used as type argument. Any other response type if type-safe access to [custom claims](https://pkg.go.dev/github.com/zitadel/oidc/v3/pkg/client/rs#example-Introspect-Custom) is required.
+
+```bash
+find . -type f -name '*.go' | xargs sed -i \
+    -e 's/rs\.Introspect(/rs.Introspect[*oidc.IntrospectionResponse](/g'
+```
+
+### client/tokenexchange
+
+The `TokenExchanger` constructor functions `NewTokenExchanger` and `NewTokenExchangerClientCredentials` now take a context as first argument.
+As well as the `ExchangeToken` function.
+
+```bash
+find . -type f -name '*.go' | xargs sed -i \
+    -e 's/tokenexchange\.NewTokenExchanger(/tokenexchange.NewTokenExchanger(context.TODO(), /g' \
+    -e 's/tokenexchange\.NewTokenExchangerClientCredentials(/tokenexchange.NewTokenExchangerClientCredentials(context.TODO(), /g' \
+    -e 's/tokenexchange\.ExchangeToken(/tokenexchange.ExchangeToken(context.TODO(), /g'
+```
+
+### oidc
+
+#### SpaceDelimitedArray
+
+The `SpaceDelimitedArray` type's `Encode()` function has been renamed to `String()` so it implements the `fmt.Stringer` interface. If the `Encode` method was called by a package consumer, it should be changed manually.
+
+#### Verifier
+
+The `Verifier` interface as been changed into a struct type. The struct type is aliased in the `op` and `rp` packages for the specific token use cases. See the relevant section above.
+
+### Full script
+
+For the courageous this is the full `sed` script which combines all the steps described above.
+It should migrate most of the code in a repository to a more-or-less compilable state,
+using defaults such as `context.TODO()` where possible.
+
+Warnings:
+- Again, this is written for **GNU sed** not the posix variant.
+- Assumes imports that use the package names, not aliases.
+- Do this on a project with version control (eg Git), that allows you to rollback if things went wrong.
+- The script has been tested on the [ZITADEL](https://github.com/zitadel/zitadel) project, but we do not use all affected symbols. Parts of the script are mere guesswork.
+
+```bash
+go get -u github.com/zitadel/oidc/v3
+find . -type f -name '*.go' | xargs sed -i \
+    -e 's/github\.com\/zitadel\/oidc\/v2/github.com\/zitadel\/oidc\/v3/g' \
+    -e 's/gopkg.in\/square\/go-jose\.v2/github.com\/go-jose\/go-jose\/v3/g' \
+    -e 's/\bAuthRequestError(w, r, authReq, err, authorizer.Encoder())/AuthRequestError(w, r, authReq, err, authorizer)/g' \
+    -e 's/\bop\.AccessTokenVerifier\b/*op.AccessTokenVerifier/g' \
+    -e 's/\bop\.JWTProfileVerifier\b/*op.JWTProfileVerifier/g' \
+    -e 's/\bop\.IDTokenHintVerifier\b/*op.IDTokenHintVerifier/g' \
+    -e 's/AuthorizationEndpoint() Endpoint/AuthorizationEndpoint() *Endpoint/g' \
+    -e 's/TokenEndpoint() Endpoint/TokenEndpoint() *Endpoint/g' \
+    -e 's/IntrospectionEndpoint() Endpoint/IntrospectionEndpoint() *Endpoint/g' \
+    -e 's/UserinfoEndpoint() Endpoint/UserinfoEndpoint() *Endpoint/g' \
+    -e 's/RevocationEndpoint() Endpoint/RevocationEndpoint() *Endpoint/g' \
+    -e 's/EndSessionEndpoint() Endpoint/EndSessionEndpoint() *Endpoint/g' \
+    -e 's/KeysEndpoint() Endpoint/KeysEndpoint() *Endpoint/g' \
+    -e 's/DeviceAuthorizationEndpoint() Endpoint/DeviceAuthorizationEndpoint() *Endpoint/g' \
+    -e 's/op\.CreateDiscoveryConfig(/op.CreateDiscoveryConfig(context.TODO(), /g' \
+    -e 's/op\.AuthorizeCodeChallenge(tokenReq/op.AuthorizeCodeChallenge(tokenReq.CodeVerifier/g' \
+    -e 's/client\.Discover(/client.Discover(context.TODO(), /g' \
+    -e 's/client\.CallTokenEndpoint(/client.CallTokenEndpoint(context.TODO(), /g' \
+    -e 's/client\.CallEndSessionEndpoint(/client.CallEndSessionEndpoint(context.TODO(), /g' \
+    -e 's/client\.CallRevokeEndpoint(/client.CallRevokeEndpoint(context.TODO(), /g' \
+    -e 's/client\.CallTokenExchangeEndpoint(/client.CallTokenExchangeEndpoint(context.TODO(), /g' \
+    -e 's/client\.CallDeviceAuthorizationEndpoint(/client.CallDeviceAuthorizationEndpoint(context.TODO(), /g' \
+    -e 's/client\.JWTProfileExchange(/client.JWTProfileExchange(context.TODO(), /g' \
+    -e 's/profile\.NewJWTProfileTokenSource(/profile.NewJWTProfileTokenSource(context.TODO(), /g' \
+    -e 's/profile\.NewJWTProfileTokenSourceFromKeyFileData(/profile.NewJWTProfileTokenSourceFromKeyFileData(context.TODO(), /g' \
+    -e 's/profile\.NewJWTProfileTokenSourceFromKeyFile(/profile.NewJWTProfileTokenSourceFromKeyFile(context.TODO(), /g' \
+    -e 's/rp\.NewRelyingPartyOIDC(/rp.NewRelyingPartyOIDC(context.TODO(), /g' \
+    -e 's/rp\.EndSession(/rp.EndSession(context.TODO(), /g' \
+    -e 's/rp\.RevokeToken(/rp.RevokeToken(context.TODO(), /g' \
+    -e 's/rp\.DeviceAuthorization(/rp.DeviceAuthorization(context.TODO(), /g' \
+    -e 's/rp\.RefreshAccessToken(/rp.RefreshTokens[*oidc.IDTokenClaims](context.TODO(), /g' \
+    -e 's/rp\.Userinfo(/rp.Userinfo[*oidc.UserInfo](context.TODO(), /g' \
+    -e 's/\brp\.IDTokenVerifier\b/*rp.IDTokenVerifier/g' \
+    -e 's/rs\.NewResourceServerClientCredentials(/rs.NewResourceServerClientCredentials(context.TODO(), /g' \
+    -e 's/rs\.NewResourceServerJWTProfile(/rs.NewResourceServerJWTProfile(context.TODO(), /g' \
+    -e 's/rs\.Introspect(/rs.Introspect[*oidc.IntrospectionResponse](/g' \
+    -e 's/tokenexchange\.NewTokenExchanger(/tokenexchange.NewTokenExchanger(context.TODO(), /g' \
+    -e 's/tokenexchange\.NewTokenExchangerClientCredentials(/tokenexchange.NewTokenExchangerClientCredentials(context.TODO(), /g' \
+    -e 's/tokenexchange\.ExchangeToken(/tokenexchange.ExchangeToken(context.TODO(), /g'
+go mod tidy
+```

example/client/api/api.go

@@ -1,90 +1,104 @@
 package main
 
-// import (
-// 	"encoding/json"
-// 	"fmt"
-// 	"log"
-// 	"net/http"
-// 	"os"
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"log"
+	"net/http"
+	"os"
+	"strings"
+	"time"
 
-// 	"github.com/caos/oidc/pkg/oidc"
-// 	"github.com/caos/oidc/pkg/oidc/rp"
-// 	"github.com/caos/utils/logging"
-// )
+	"github.com/go-chi/chi/v5"
+	"github.com/sirupsen/logrus"
 
-// const (
-// 	publicURL            string = "/public"
-// 	protectedURL         string = "/protected"
-// 	protectedExchangeURL string = "/protected/exchange"
-// )
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/client/rs"
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/oidc"
+)
+
+const (
+	publicURL         string = "/public"
+	protectedURL      string = "/protected"
+	protectedClaimURL string = "/protected/{claim}/{value}"
+)
 
 func main() {
-	// 	clientID := os.Getenv("CLIENT_ID")
-	// 	clientSecret := os.Getenv("CLIENT_SECRET")
-	// 	issuer := os.Getenv("ISSUER")
-	// 	port := os.Getenv("PORT")
+	keyPath := os.Getenv("KEY")
+	port := os.Getenv("PORT")
+	issuer := os.Getenv("ISSUER")
 
-	// 	// ctx := context.Background()
+	provider, err := rs.NewResourceServerFromKeyFile(context.TODO(), issuer, keyPath)
+	if err != nil {
+		logrus.Fatalf("error creating provider %s", err.Error())
+	}
 
-	// 	providerConfig := &oidc.ProviderConfig{
-	// 		ClientID:     clientID,
-	// 		ClientSecret: clientSecret,
-	// 		Issuer:       issuer,
-	// 	}
-	// 	provider, err := rp.NewDefaultProvider(providerConfig)
-	// 	logging.Log("APP-nx6PeF").OnError(err).Panic("error creating provider")
+	router := chi.NewRouter()
 
-	// 	http.HandleFunc(publicURL, func(w http.ResponseWriter, r *http.Request) {
-	// 		w.Write([]byte("OK"))
-	// 	})
+	// public url accessible without any authorization
+	// will print `OK` and current timestamp
+	router.HandleFunc(publicURL, func(w http.ResponseWriter, r *http.Request) {
+		w.Write([]byte("OK " + time.Now().String()))
+	})
 
-	// 	http.HandleFunc(protectedURL, func(w http.ResponseWriter, r *http.Request) {
-	// 		ok, token := checkToken(w, r)
-	// 		if !ok {
-	// 			return
-	// 		}
-	// 		resp, err := provider.Introspect(r.Context(), token)
-	// 		if err != nil {
-	// 			http.Error(w, err.Error(), http.StatusForbidden)
-	// 			return
-	// 		}
-	// 		data, err := json.Marshal(resp)
-	// 		if err != nil {
-	// 			http.Error(w, err.Error(), http.StatusInternalServerError)
-	// 			return
-	// 		}
-	// 		w.Write(data)
-	// 	})
+	// protected url which needs an active token
+	// will print the result of the introspection endpoint on success
+	router.HandleFunc(protectedURL, func(w http.ResponseWriter, r *http.Request) {
+		ok, token := checkToken(w, r)
+		if !ok {
+			return
+		}
+		resp, err := rs.Introspect[*oidc.IntrospectionResponse](r.Context(), provider, token)
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusForbidden)
+			return
+		}
+		data, err := json.Marshal(resp)
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+		w.Write(data)
+	})
 
-	// 	http.HandleFunc(protectedExchangeURL, func(w http.ResponseWriter, r *http.Request) {
-	// 		ok, token := checkToken(w, r)
-	// 		if !ok {
-	// 			return
-	// 		}
-	// 		tokens, err := provider.DelegationTokenExchange(r.Context(), token, oidc.WithResource([]string{"Test"}))
-	// 		if err != nil {
-	// 			http.Error(w, "failed to exchange token: "+err.Error(), http.StatusUnauthorized)
-	// 			return
-	// 		}
+	// protected url which needs an active token and checks if the response of the introspect endpoint
+	// contains a requested claim with the required (string) value
+	// e.g. /protected/username/livio@zitadel.example
+	router.HandleFunc(protectedClaimURL, func(w http.ResponseWriter, r *http.Request) {
+		ok, token := checkToken(w, r)
+		if !ok {
+			return
+		}
+		resp, err := rs.Introspect[*oidc.IntrospectionResponse](r.Context(), provider, token)
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusForbidden)
+			return
+		}
+		requestedClaim := chi.URLParam(r, "claim")
+		requestedValue := chi.URLParam(r, "value")
 
-	// 		data, err := json.Marshal(tokens)
-	// 		if err != nil {
-	// 			http.Error(w, err.Error(), http.StatusInternalServerError)
-	// 			return
-	// 		}
-	// 		w.Write(data)
-	// 	})
+		value, ok := resp.Claims[requestedClaim].(string)
+		if !ok || value == "" || value != requestedValue {
+			http.Error(w, "claim does not match", http.StatusForbidden)
+			return
+		}
+		w.Write([]byte("authorized with value " + value))
+	})
 
-	// 	lis := fmt.Sprintf("127.0.0.1:%s", port)
-	// 	log.Printf("listening on http://%s/", lis)
-	// 	log.Fatal(http.ListenAndServe(lis, nil))
-	// }
-
-	// func checkToken(w http.ResponseWriter, r *http.Request) (bool, string) {
-	// 	token := r.Header.Get("authorization")
-	// 	if token == "" {
-	// 		http.Error(w, "Auth header missing", http.StatusUnauthorized)
-	// 		return false, ""
-	// 	}
-	// 	return true, token
+	lis := fmt.Sprintf("127.0.0.1:%s", port)
+	log.Printf("listening on http://%s/", lis)
+	log.Fatal(http.ListenAndServe(lis, router))
+}
+
+func checkToken(w http.ResponseWriter, r *http.Request) (bool, string) {
+	auth := r.Header.Get("authorization")
+	if auth == "" {
+		http.Error(w, "auth header missing", http.StatusUnauthorized)
+		return false, ""
+	}
+	if !strings.HasPrefix(auth, oidc.PrefixBearer) {
+		http.Error(w, "invalid header", http.StatusUnauthorized)
+		return false, ""
+	}
+	return true, strings.TrimPrefix(auth, oidc.PrefixBearer)
 }

example/client/app/app.go

@@ -4,147 +4,178 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
-	"html/template"
-	"io/ioutil"
+	"log/slog"
 	"net/http"
 	"os"
+	"strings"
+	"sync/atomic"
 	"time"
 
 	"github.com/google/uuid"
 	"github.com/sirupsen/logrus"
 
-	"github.com/caos/oidc/pkg/oidc"
-	"github.com/caos/oidc/pkg/rp"
-	"github.com/caos/oidc/pkg/utils"
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/client/rp"
+	httphelper "git.christmann.info/LARA/zitadel-oidc/v3/pkg/http"
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/oidc"
+	"github.com/zitadel/logging"
 )
 
 var (
-	callbackPath string = "/auth/callback"
-	key          []byte = []byte("test1234test1234")
+	callbackPath = "/auth/callback"
+	key          = []byte("test1234test1234")
 )
 
 func main() {
 	clientID := os.Getenv("CLIENT_ID")
 	clientSecret := os.Getenv("CLIENT_SECRET")
+	keyPath := os.Getenv("KEY_PATH")
 	issuer := os.Getenv("ISSUER")
 	port := os.Getenv("PORT")
-
-	ctx := context.Background()
+	scopes := strings.Split(os.Getenv("SCOPES"), " ")
+	responseMode := os.Getenv("RESPONSE_MODE")
 
 	redirectURI := fmt.Sprintf("http://localhost:%v%v", port, callbackPath)
-	scopes := []string{oidc.ScopeOpenID, oidc.ScopeProfile, oidc.ScopeEmail, oidc.ScopeAddress}
-	cookieHandler := utils.NewCookieHandler(key, key, utils.WithUnsecure())
-	provider, err := rp.NewRelayingPartyOIDC(issuer, clientID, clientSecret, redirectURI, scopes,
-		rp.WithPKCE(cookieHandler),
-		rp.WithVerifierOpts(rp.WithIssuedAtOffset(5*time.Second)),
+	cookieHandler := httphelper.NewCookieHandler(key, key, httphelper.WithUnsecure())
+
+	logger := slog.New(
+		slog.NewTextHandler(os.Stderr, &slog.HandlerOptions{
+			AddSource: true,
+			Level:     slog.LevelDebug,
+		}),
 	)
+	client := &http.Client{
+		Timeout: time.Minute,
+	}
+	// enable outgoing request logging
+	logging.EnableHTTPClient(client,
+		logging.WithClientGroup("client"),
+	)
+
+	options := []rp.Option{
+		rp.WithCookieHandler(cookieHandler),
+		rp.WithVerifierOpts(rp.WithIssuedAtOffset(5 * time.Second)),
+		rp.WithHTTPClient(client),
+		rp.WithLogger(logger),
+		rp.WithSigningAlgsFromDiscovery(),
+	}
+	if clientSecret == "" {
+		options = append(options, rp.WithPKCE(cookieHandler))
+	}
+	if keyPath != "" {
+		options = append(options, rp.WithJWTProfile(rp.SignerFromKeyPath(keyPath)))
+	}
+
+	// One can add a logger to the context,
+	// pre-defining log attributes as required.
+	ctx := logging.ToContext(context.TODO(), logger)
+	provider, err := rp.NewRelyingPartyOIDC(ctx, issuer, clientID, clientSecret, redirectURI, scopes, options...)
 	if err != nil {
 		logrus.Fatalf("error creating provider %s", err.Error())
 	}
 
-	//generate some state (representing the state of the user in your application,
-	//e.g. the page where he was before sending him to login
+	// generate some state (representing the state of the user in your application,
+	// e.g. the page where he was before sending him to login
 	state := func() string {
 		return uuid.New().String()
 	}
 
-	//register the AuthURLHandler at your preferred path
-	//the AuthURLHandler creates the auth request and redirects the user to the auth server
-	//including state handling with secure cookie and the possibility to use PKCE
-	http.Handle("/login", rp.AuthURLHandler(state, provider))
+	urlOptions := []rp.URLParamOpt{
+		rp.WithPromptURLParam("Welcome back!"),
+	}
 
-	//for demonstration purposes the returned tokens (access token, id_token an its parsed claims)
-	//are written as JSON objects onto response
-	marshal := func(w http.ResponseWriter, r *http.Request, tokens *oidc.Tokens, state string) {
-		_ = state
-		data, err := json.Marshal(tokens)
+	if responseMode != "" {
+		urlOptions = append(urlOptions, rp.WithResponseModeURLParam(oidc.ResponseMode(responseMode)))
+	}
+
+	// register the AuthURLHandler at your preferred path.
+	// the AuthURLHandler creates the auth request and redirects the user to the auth server.
+	// including state handling with secure cookie and the possibility to use PKCE.
+	// Prompts can optionally be set to inform the server of
+	// any messages that need to be prompted back to the user.
+	http.Handle("/login", rp.AuthURLHandler(
+		state,
+		provider,
+		urlOptions...,
+	))
+
+	// for demonstration purposes the returned userinfo response is written as JSON object onto response
+	marshalUserinfo := func(w http.ResponseWriter, r *http.Request, tokens *oidc.Tokens[*oidc.IDTokenClaims], state string, rp rp.RelyingParty, info *oidc.UserInfo) {
+		fmt.Println("access token", tokens.AccessToken)
+		fmt.Println("refresh token", tokens.RefreshToken)
+		fmt.Println("id token", tokens.IDToken)
+
+		data, err := json.Marshal(info)
 		if err != nil {
 			http.Error(w, err.Error(), http.StatusInternalServerError)
 			return
 		}
+		w.Header().Set("content-type", "application/json")
 		w.Write(data)
 	}
 
-	//register the CodeExchangeHandler at the callbackPath
-	//the CodeExchangeHandler handles the auth response, creates the token request and calls the callback function
-	//with the returned tokens from the token endpoint
-	http.Handle(callbackPath, rp.CodeExchangeHandler(marshal, provider))
+	// you could also just take the access_token and id_token without calling the userinfo endpoint:
+	//
+	// marshalToken := func(w http.ResponseWriter, r *http.Request, tokens *oidc.Tokens, state string, rp rp.RelyingParty) {
+	//	data, err := json.Marshal(tokens)
+	//	if err != nil {
+	//		http.Error(w, err.Error(), http.StatusInternalServerError)
+	//		return
+	//	}
+	//	w.Write(data)
+	//}
 
-	http.HandleFunc("/test", func(w http.ResponseWriter, r *http.Request) {
-		tokens, err := rp.ClientCredentials(ctx, provider, "scope")
-		if err != nil {
-			http.Error(w, "failed to exchange token: "+err.Error(), http.StatusUnauthorized)
-			return
-		}
+	// you can also try token exchange flow
+	//
+	// requestTokenExchange := func(w http.ResponseWriter, r *http.Request, tokens *oidc.Tokens, state string, rp rp.RelyingParty, info oidc.UserInfo) {
+	// 	data := make(url.Values)
+	// 	data.Set("grant_type", string(oidc.GrantTypeTokenExchange))
+	// 	data.Set("requested_token_type", string(oidc.IDTokenType))
+	// 	data.Set("subject_token", tokens.RefreshToken)
+	// 	data.Set("subject_token_type", string(oidc.RefreshTokenType))
+	// 	data.Add("scope", "profile custom_scope:impersonate:id2")
 
-		data, err := json.Marshal(tokens)
-		if err != nil {
-			http.Error(w, err.Error(), http.StatusInternalServerError)
-			return
-		}
-		w.Write(data)
-	})
+	// 	client := &http.Client{}
+	// 	r2, _ := http.NewRequest(http.MethodPost, issuer+"/oauth/token", strings.NewReader(data.Encode()))
+	// 	// r2.Header.Add("Authorization", "Basic "+"d2ViOnNlY3JldA==")
+	// 	r2.Header.Add("Content-Type", "application/x-www-form-urlencoded")
+	// 	r2.SetBasicAuth("web", "secret")
 
-	http.HandleFunc("/jwt-profile", func(w http.ResponseWriter, r *http.Request) {
-		if r.Method == "GET" {
-			tpl := `
-	<!DOCTYPE html>
-	<html>
-		<head>
-			<meta charset="UTF-8">
-			<title>Login</title>
-		</head>
-		<body>
-			<form method="POST" action="/jwt-profile" enctype="multipart/form-data">
-				<label for="key">Select a key file:</label>
-				<input type="file" accept=".json" id="key" name="key">
-				<button type="submit">Get Token</button>
-			</form>
-		</body>
-	</html>`
-			t, err := template.New("login").Parse(tpl)
-			if err != nil {
-				http.Error(w, err.Error(), http.StatusInternalServerError)
-				return
-			}
-			err = t.Execute(w, nil)
-			if err != nil {
-				http.Error(w, err.Error(), http.StatusInternalServerError)
-			}
-		} else {
-			err := r.ParseMultipartForm(4 << 10)
-			if err != nil {
-				http.Error(w, err.Error(), http.StatusInternalServerError)
-				return
-			}
-			file, handler, err := r.FormFile("key")
-			if err != nil {
-				http.Error(w, err.Error(), http.StatusInternalServerError)
-				return
-			}
-			defer file.Close()
+	// 	resp, _ := client.Do(r2)
+	// 	fmt.Println(resp.Status)
+
+	// 	b, _ := io.ReadAll(resp.Body)
+	// 	resp.Body.Close()
+
+	// 	w.Write(b)
+	// }
+
+	// register the CodeExchangeHandler at the callbackPath
+	// the CodeExchangeHandler handles the auth response, creates the token request and calls the callback function
+	// with the returned tokens from the token endpoint
+	// in this example the callback function itself is wrapped by the UserinfoCallback which
+	// will call the Userinfo endpoint, check the sub and pass the info into the callback function
+	http.Handle(callbackPath, rp.CodeExchangeHandler(rp.UserinfoCallback(marshalUserinfo), provider))
+
+	// if you would use the callback without calling the userinfo endpoint, simply switch the callback handler for:
+	//
+	// http.Handle(callbackPath, rp.CodeExchangeHandler(marshalToken, provider))
+
+	// simple counter for request IDs
+	var counter atomic.Int64
+	// enable incomming request logging
+	mw := logging.Middleware(
+		logging.WithLogger(logger),
+		logging.WithGroup("server"),
+		logging.WithIDFunc(func() slog.Attr {
+			return slog.Int64("id", counter.Add(1))
+		}),
+	)
 
-			key, err := ioutil.ReadAll(file)
-			fmt.Println(handler.Header)
-			assertion, err := oidc.NewJWTProfileAssertionFromFileData(key, []string{issuer})
-			if err != nil {
-				http.Error(w, err.Error(), http.StatusInternalServerError)
-				return
-			}
-			token, err := rp.JWTProfileAssertionExchange(ctx, assertion, scopes, provider)
-			if err != nil {
-				http.Error(w, err.Error(), http.StatusInternalServerError)
-				return
-			}
-			data, err := json.Marshal(token)
-			if err != nil {
-				http.Error(w, err.Error(), http.StatusInternalServerError)
-				return
-			}
-			w.Write(data)
-		}
-	})
 	lis := fmt.Sprintf("127.0.0.1:%s", port)
-	logrus.Infof("listening on http://%s/", lis)
-	logrus.Fatal(http.ListenAndServe("127.0.0.1:"+port, nil))
+	logger.Info("server listening, press ctrl+c to stop", "addr", lis)
+	err = http.ListenAndServe(lis, mw(http.DefaultServeMux))
+	if err != http.ErrServerClosed {
+		logger.Error("server terminated", "error", err)
+		os.Exit(1)
+	}
 }

example/client/device/device.go

@@ -0,0 +1,95 @@
+// Command device is an example Oauth2 Device Authorization Grant app.
+// It creates a new Device Authorization request on the Issuer and then polls for tokens.
+// The user is then prompted to visit a URL and enter the user code.
+// Or, the complete URL can be used instead to omit manual entry.
+// In practice then can be a "magic link" in the form or a QR.
+//
+// The following environment variables are used for configuration:
+//
+//	ISSUER: URL to the OP, required.
+//	CLIENT_ID: ID of the application, required.
+//	CLIENT_SECRET: Secret to authenticate the app using basic auth. Only required if the OP expects this type of authentication.
+//	KEY_PATH: Path to a private key file, used to for JWT authentication of the App. Only required if the OP expects this type of authentication.
+//	SCOPES: Scopes of the Authentication Request. Optional.
+//
+// Basic usage:
+//
+//	cd example/client/device
+//	export ISSUER="http://localhost:9000" CLIENT_ID="246048465824634593@demo"
+//
+// Get an Access Token:
+//
+//	SCOPES="email profile" go run .
+//
+// Get an Access Token and ID Token:
+//
+//	SCOPES="email profile openid" go run .
+//
+// Get an Access Token and Refresh Token
+//
+//	SCOPES="email profile offline_access" go run .
+//
+// Get Access, Refresh and ID Tokens:
+//
+//	SCOPES="email profile offline_access openid" go run .
+package main
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"os/signal"
+	"strings"
+	"syscall"
+	"time"
+
+	"github.com/sirupsen/logrus"
+
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/client/rp"
+	httphelper "git.christmann.info/LARA/zitadel-oidc/v3/pkg/http"
+)
+
+var (
+	key = []byte("test1234test1234")
+)
+
+func main() {
+	ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGINT)
+	defer stop()
+
+	clientID := os.Getenv("CLIENT_ID")
+	clientSecret := os.Getenv("CLIENT_SECRET")
+	keyPath := os.Getenv("KEY_PATH")
+	issuer := os.Getenv("ISSUER")
+	scopes := strings.Split(os.Getenv("SCOPES"), " ")
+
+	cookieHandler := httphelper.NewCookieHandler(key, key, httphelper.WithUnsecure())
+
+	var options []rp.Option
+	if clientSecret == "" {
+		options = append(options, rp.WithPKCE(cookieHandler))
+	}
+	if keyPath != "" {
+		options = append(options, rp.WithJWTProfile(rp.SignerFromKeyPath(keyPath)))
+	}
+
+	provider, err := rp.NewRelyingPartyOIDC(ctx, issuer, clientID, clientSecret, "", scopes, options...)
+	if err != nil {
+		logrus.Fatalf("error creating provider %s", err.Error())
+	}
+
+	logrus.Info("starting device authorization flow")
+	resp, err := rp.DeviceAuthorization(ctx, scopes, provider, nil)
+	if err != nil {
+		logrus.Fatal(err)
+	}
+	logrus.Info("resp", resp)
+	fmt.Printf("\nPlease browse to %s and enter code %s\n", resp.VerificationURI, resp.UserCode)
+
+	logrus.Info("start polling")
+	token, err := rp.DeviceAccessToken(ctx, resp.DeviceCode, time.Duration(resp.Interval)*time.Second, provider)
+	if err != nil {
+		logrus.Fatal(err)
+	}
+	logrus.Infof("successfully obtained token: %#v", token)
+}

example/client/github/github.go

@@ -10,14 +10,15 @@ import (
 	"golang.org/x/oauth2"
 	githubOAuth "golang.org/x/oauth2/github"
 
-	"github.com/caos/oidc/pkg/rp"
-	"github.com/caos/oidc/pkg/rp/cli"
-	"github.com/caos/oidc/pkg/utils"
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/client/rp"
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/client/rp/cli"
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/http"
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/oidc"
 )
 
 var (
-	callbackPath string = "/orbctl/github/callback"
-	key          []byte = []byte("test1234test1234")
+	callbackPath = "/orbctl/github/callback"
+	key          = []byte("test1234test1234")
 )
 
 func main() {
@@ -34,8 +35,8 @@ func main() {
 	}
 
 	ctx := context.Background()
-	cookieHandler := utils.NewCookieHandler(key, key, utils.WithUnsecure())
-	relayingParty, err := rp.NewRelayingPartyOAuth(rpConfig, rp.WithCookieHandler(cookieHandler))
+	cookieHandler := http.NewCookieHandler(key, key, http.WithUnsecure())
+	relyingParty, err := rp.NewRelyingPartyOAuth(rpConfig, rp.WithCookieHandler(cookieHandler))
 	if err != nil {
 		fmt.Printf("error creating relaying party: %v", err)
 		return
@@ -43,9 +44,9 @@ func main() {
 	state := func() string {
 		return uuid.New().String()
 	}
-	token := cli.CodeFlow(relayingParty, callbackPath, port, state)
+	token := cli.CodeFlow[*oidc.IDTokenClaims](ctx, relyingParty, callbackPath, port, state)
 
-	client := github.NewClient(relayingParty.OAuthConfig().Client(ctx, token.Token))
+	client := github.NewClient(relyingParty.OAuthConfig().Client(ctx, token.Token))
 
 	_, _, err = client.Users.Get(ctx, "")
 	if err != nil {

example/client/service/service.go

@@ -0,0 +1,177 @@
+package main
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"html/template"
+	"io"
+	"net/http"
+	"os"
+	"strings"
+
+	"github.com/sirupsen/logrus"
+	"golang.org/x/oauth2"
+
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/client/profile"
+)
+
+var client = http.DefaultClient
+
+func main() {
+	keyPath := os.Getenv("KEY_PATH")
+	issuer := os.Getenv("ISSUER")
+	port := os.Getenv("PORT")
+	scopes := strings.Split(os.Getenv("SCOPES"), " ")
+
+	if keyPath != "" {
+		ts, err := profile.NewJWTProfileTokenSourceFromKeyFile(context.TODO(), issuer, keyPath, scopes)
+		if err != nil {
+			logrus.Fatalf("error creating token source %s", err.Error())
+		}
+		client = oauth2.NewClient(context.Background(), ts)
+	}
+
+	http.HandleFunc("/jwt-profile", func(w http.ResponseWriter, r *http.Request) {
+		if r.Method == "GET" {
+			tpl := `
+	<!DOCTYPE html>
+	<html>
+		<head>
+			<meta charset="UTF-8">
+			<title>Login</title>
+		</head>
+		<body>
+			<form method="POST" action="/jwt-profile" enctype="multipart/form-data">
+				<label for="key">Select a key file:</label>
+				<input type="file" accept=".json" id="key" name="key">
+				<button type="submit">Get Token</button>
+			</form>
+		</body>
+	</html>`
+			t, err := template.New("login").Parse(tpl)
+			if err != nil {
+				http.Error(w, err.Error(), http.StatusInternalServerError)
+				return
+			}
+			err = t.Execute(w, nil)
+			if err != nil {
+				http.Error(w, err.Error(), http.StatusInternalServerError)
+			}
+		} else {
+			err := r.ParseMultipartForm(4 << 10)
+			if err != nil {
+				http.Error(w, err.Error(), http.StatusInternalServerError)
+				return
+			}
+			file, _, err := r.FormFile("key")
+			if err != nil {
+				http.Error(w, err.Error(), http.StatusInternalServerError)
+				return
+			}
+			defer file.Close()
+
+			key, err := io.ReadAll(file)
+			if err != nil {
+				http.Error(w, err.Error(), http.StatusInternalServerError)
+				return
+			}
+			ts, err := profile.NewJWTProfileTokenSourceFromKeyFileData(context.TODO(), issuer, key, scopes)
+			if err != nil {
+				http.Error(w, err.Error(), http.StatusInternalServerError)
+				return
+			}
+			client = oauth2.NewClient(context.Background(), ts)
+			token, err := ts.Token()
+			if err != nil {
+				http.Error(w, err.Error(), http.StatusInternalServerError)
+				return
+			}
+			data, err := json.Marshal(token)
+			if err != nil {
+				http.Error(w, err.Error(), http.StatusInternalServerError)
+				return
+			}
+			w.Write(data)
+		}
+	})
+
+	http.HandleFunc("/test", func(w http.ResponseWriter, r *http.Request) {
+		tpl := `
+	<!DOCTYPE html>
+	<html>
+		<head>
+			<meta charset="UTF-8">
+			<title>Test</title>
+		</head>
+		<body>
+			<form method="POST" action="/test">
+				<label for="url">URL for test:</label>
+				<input type="text" id="url" name="url" width="200px">
+				<button type="submit">Test Token</button>
+			</form>
+			{{if .URL}}
+			<p>
+				Result for {{.URL}}: {{.Response}}
+			</p>
+			{{end}}
+		</body>
+	</html>`
+		err := r.ParseForm()
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+		testURL := r.Form.Get("url")
+		var data struct {
+			URL      string
+			Response any
+		}
+		if testURL != "" {
+			data.URL = testURL
+			data.Response, err = callExampleEndpoint(client, testURL)
+			if err != nil {
+				data.Response = err
+			}
+		}
+		t, err := template.New("login").Parse(tpl)
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+		err = t.Execute(w, data)
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+		}
+	})
+	lis := fmt.Sprintf("127.0.0.1:%s", port)
+	logrus.Infof("listening on http://%s/", lis)
+	logrus.Fatal(http.ListenAndServe("127.0.0.1:"+port, nil))
+}
+
+func callExampleEndpoint(client *http.Client, testURL string) (any, error) {
+	req, err := http.NewRequest("GET", testURL, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	resp, err := client.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	if resp.StatusCode != http.StatusOK {
+		return "", fmt.Errorf("http status not ok: %s %s", resp.Status, body)
+	}
+
+	if strings.HasPrefix(resp.Header.Get("content-type"), "text/plain") {
+		return string(body), nil
+	}
+	return body, err
+}

example/doc.go

@@ -1 +1,10 @@
+/*
+Package example contains some example of the various use of this library:
+
+/api        example of an api / resource server implementation using token introspection
+/app        web app / RP demonstrating authorization code flow using various authentication methods (code, PKCE, JWT profile)
+/github     example of the extended OAuth2 library, providing an HTTP client with a reuse token source
+/service    demonstration of JWT Profile Authorization Grant
+/server		examples of an OpenID Provider implementations (including dynamic) with some very basic
+*/
 package example

example/internal/mock/storage.go

@@ -1,293 +0,0 @@
-package mock
-
-import (
-	"context"
-	"crypto/rand"
-	"crypto/rsa"
-	"errors"
-	"time"
-
-	"gopkg.in/square/go-jose.v2"
-
-	"github.com/caos/oidc/pkg/oidc"
-	"github.com/caos/oidc/pkg/op"
-)
-
-type AuthStorage struct {
-	key *rsa.PrivateKey
-}
-
-func NewAuthStorage() op.Storage {
-	reader := rand.Reader
-	bitSize := 2048
-	key, err := rsa.GenerateKey(reader, bitSize)
-	if err != nil {
-		panic(err)
-	}
-	return &AuthStorage{
-		key: key,
-	}
-}
-
-type AuthRequest struct {
-	ID            string
-	ResponseType  oidc.ResponseType
-	RedirectURI   string
-	Nonce         string
-	ClientID      string
-	CodeChallenge *oidc.CodeChallenge
-}
-
-func (a *AuthRequest) GetACR() string {
-	return ""
-}
-
-func (a *AuthRequest) GetAMR() []string {
-	return []string{
-		"password",
-	}
-}
-
-func (a *AuthRequest) GetAudience() []string {
-	return []string{
-		a.ClientID,
-	}
-}
-
-func (a *AuthRequest) GetAuthTime() time.Time {
-	return time.Now().UTC()
-}
-
-func (a *AuthRequest) GetClientID() string {
-	return a.ClientID
-}
-
-func (a *AuthRequest) GetCode() string {
-	return "code"
-}
-
-func (a *AuthRequest) GetCodeChallenge() *oidc.CodeChallenge {
-	return a.CodeChallenge
-}
-
-func (a *AuthRequest) GetID() string {
-	return a.ID
-}
-
-func (a *AuthRequest) GetNonce() string {
-	return a.Nonce
-}
-
-func (a *AuthRequest) GetRedirectURI() string {
-	return a.RedirectURI
-	// return "http://localhost:5556/auth/callback"
-}
-
-func (a *AuthRequest) GetResponseType() oidc.ResponseType {
-	return a.ResponseType
-}
-
-func (a *AuthRequest) GetScopes() []string {
-	return []string{
-		"openid",
-		"profile",
-		"email",
-	}
-}
-
-func (a *AuthRequest) GetState() string {
-	return ""
-}
-
-func (a *AuthRequest) GetSubject() string {
-	return "sub"
-}
-
-func (a *AuthRequest) Done() bool {
-	return true
-}
-
-var (
-	a = &AuthRequest{}
-	t bool
-	c string
-)
-
-func (s *AuthStorage) Health(ctx context.Context) error {
-	return nil
-}
-
-func (s *AuthStorage) CreateAuthRequest(_ context.Context, authReq *oidc.AuthRequest, _ string) (op.AuthRequest, error) {
-	a = &AuthRequest{ID: "id", ClientID: authReq.ClientID, ResponseType: authReq.ResponseType, Nonce: authReq.Nonce, RedirectURI: authReq.RedirectURI}
-	if authReq.CodeChallenge != "" {
-		a.CodeChallenge = &oidc.CodeChallenge{
-			Challenge: authReq.CodeChallenge,
-			Method:    authReq.CodeChallengeMethod,
-		}
-	}
-	t = false
-	return a, nil
-}
-func (s *AuthStorage) AuthRequestByCode(_ context.Context, code string) (op.AuthRequest, error) {
-	if code != c {
-		return nil, errors.New("invalid code")
-	}
-	return a, nil
-}
-func (s *AuthStorage) SaveAuthCode(_ context.Context, id, code string) error {
-	if a.ID != id {
-		return errors.New("not found")
-	}
-	c = code
-	return nil
-}
-func (s *AuthStorage) DeleteAuthRequest(context.Context, string) error {
-	t = true
-	return nil
-}
-func (s *AuthStorage) AuthRequestByID(_ context.Context, id string) (op.AuthRequest, error) {
-	if id != "id" || t {
-		return nil, errors.New("not found")
-	}
-	return a, nil
-}
-func (s *AuthStorage) CreateToken(_ context.Context, authReq op.TokenRequest) (string, time.Time, error) {
-	return "id", time.Now().UTC().Add(5 * time.Minute), nil
-}
-func (s *AuthStorage) TerminateSession(_ context.Context, userID, clientID string) error {
-	return nil
-}
-func (s *AuthStorage) GetSigningKey(_ context.Context, keyCh chan<- jose.SigningKey, _ chan<- error, _ <-chan time.Time) {
-	keyCh <- jose.SigningKey{Algorithm: jose.RS256, Key: s.key}
-}
-func (s *AuthStorage) GetKey(_ context.Context) (*rsa.PrivateKey, error) {
-	return s.key, nil
-}
-func (s *AuthStorage) SaveNewKeyPair(ctx context.Context) error {
-	return nil
-}
-func (s *AuthStorage) GetKeySet(_ context.Context) (*jose.JSONWebKeySet, error) {
-	pubkey := s.key.Public()
-	return &jose.JSONWebKeySet{
-		Keys: []jose.JSONWebKey{
-			{Key: pubkey, Use: "sig", Algorithm: "RS256", KeyID: "1"},
-		},
-	}, nil
-}
-func (s *AuthStorage) GetKeyByIDAndUserID(_ context.Context, _, _ string) (*jose.JSONWebKey, error) {
-	pubkey := s.key.Public()
-	return &jose.JSONWebKey{Key: pubkey, Use: "sig", Algorithm: "RS256", KeyID: "1"}, nil
-}
-
-func (s *AuthStorage) GetClientByClientID(_ context.Context, id string) (op.Client, error) {
-	if id == "none" {
-		return nil, errors.New("not found")
-	}
-	var appType op.ApplicationType
-	var authMethod op.AuthMethod
-	var accessTokenType op.AccessTokenType
-	var responseTypes []oidc.ResponseType
-	if id == "web" {
-		appType = op.ApplicationTypeWeb
-		authMethod = op.AuthMethodBasic
-		accessTokenType = op.AccessTokenTypeBearer
-		responseTypes = []oidc.ResponseType{oidc.ResponseTypeCode}
-	} else if id == "native" {
-		appType = op.ApplicationTypeNative
-		authMethod = op.AuthMethodNone
-		accessTokenType = op.AccessTokenTypeBearer
-		responseTypes = []oidc.ResponseType{oidc.ResponseTypeCode}
-	} else {
-		appType = op.ApplicationTypeUserAgent
-		authMethod = op.AuthMethodNone
-		accessTokenType = op.AccessTokenTypeJWT
-		responseTypes = []oidc.ResponseType{oidc.ResponseTypeIDToken, oidc.ResponseTypeIDTokenOnly}
-	}
-	return &ConfClient{ID: id, applicationType: appType, authMethod: authMethod, accessTokenType: accessTokenType, responseTypes: responseTypes, devMode: false}, nil
-}
-
-func (s *AuthStorage) AuthorizeClientIDSecret(_ context.Context, id string, _ string) error {
-	return nil
-}
-
-func (s *AuthStorage) GetUserinfoFromToken(ctx context.Context, _, _, _ string) (oidc.UserInfo, error) {
-	return s.GetUserinfoFromScopes(ctx, "", "", []string{})
-}
-func (s *AuthStorage) GetUserinfoFromScopes(_ context.Context, _, _ string, _ []string) (oidc.UserInfo, error) {
-	userinfo := oidc.NewUserInfo()
-	userinfo.SetSubject(a.GetSubject())
-	userinfo.SetAddress(oidc.NewUserInfoAddress("Test 789\nPostfach 2", "", "", "", "", ""))
-	userinfo.SetEmail("test", true)
-	userinfo.SetPhone("0791234567", true)
-	userinfo.SetName("Test")
-	userinfo.AppendClaims("private_claim", "test")
-	return userinfo, nil
-}
-func (s *AuthStorage) GetPrivateClaimsFromScopes(_ context.Context, _, _ string, _ []string) (map[string]interface{}, error) {
-	return map[string]interface{}{"private_claim": "test"}, nil
-}
-
-type ConfClient struct {
-	applicationType op.ApplicationType
-	authMethod      op.AuthMethod
-	responseTypes   []oidc.ResponseType
-	ID              string
-	accessTokenType op.AccessTokenType
-	devMode         bool
-}
-
-func (c *ConfClient) GetID() string {
-	return c.ID
-}
-func (c *ConfClient) RedirectURIs() []string {
-	return []string{
-		"https://registered.com/callback",
-		"http://localhost:9999/callback",
-		"http://localhost:5556/auth/callback",
-		"custom://callback",
-		"https://localhost:8443/test/a/instructions-example/callback",
-		"https://op.certification.openid.net:62064/authz_cb",
-		"https://op.certification.openid.net:62064/authz_post",
-	}
-}
-func (c *ConfClient) PostLogoutRedirectURIs() []string {
-	return []string{}
-}
-
-func (c *ConfClient) LoginURL(id string) string {
-	return "login?id=" + id
-}
-
-func (c *ConfClient) ApplicationType() op.ApplicationType {
-	return c.applicationType
-}
-
-func (c *ConfClient) AuthMethod() op.AuthMethod {
-	return c.authMethod
-}
-
-func (c *ConfClient) IDTokenLifetime() time.Duration {
-	return time.Duration(5 * time.Minute)
-}
-func (c *ConfClient) AccessTokenType() op.AccessTokenType {
-	return c.accessTokenType
-}
-func (c *ConfClient) ResponseTypes() []oidc.ResponseType {
-	return c.responseTypes
-}
-
-func (c *ConfClient) DevMode() bool {
-	return c.devMode
-}
-
-func (c *ConfClient) AllowedScopes() []string {
-	return nil
-}
-
-func (c *ConfClient) AssertAdditionalIdTokenScopes() bool {
-	return false
-}
-
-func (c *ConfClient) AssertAdditionalAccessTokenScopes() bool {
-	return false
-}

example/server/config/config.go

@@ -0,0 +1,40 @@
+package config
+
+import (
+	"os"
+	"strings"
+)
+
+const (
+	// default port for the http server to run
+	DefaultIssuerPort = "9998"
+)
+
+type Config struct {
+	Port        string
+	RedirectURI []string
+	UsersFile   string
+}
+
+// FromEnvVars loads configuration parameters from environment variables.
+// If there is no such variable defined, then use default values.
+func FromEnvVars(defaults *Config) *Config {
+	if defaults == nil {
+		defaults = &Config{}
+	}
+	cfg := &Config{
+		Port:        defaults.Port,
+		RedirectURI: defaults.RedirectURI,
+		UsersFile:   defaults.UsersFile,
+	}
+	if value, ok := os.LookupEnv("PORT"); ok {
+		cfg.Port = value
+	}
+	if value, ok := os.LookupEnv("USERS_FILE"); ok {
+		cfg.UsersFile = value
+	}
+	if value, ok := os.LookupEnv("REDIRECT_URI"); ok {
+		cfg.RedirectURI = strings.Split(value, ",")
+	}
+	return cfg
+}

example/server/config/config_test.go

@@ -0,0 +1,77 @@
+package config
+
+import (
+	"fmt"
+	"os"
+	"testing"
+)
+
+func TestFromEnvVars(t *testing.T) {
+
+	for _, tc := range []struct {
+		name     string
+		env      map[string]string
+		defaults *Config
+		want     *Config
+	}{
+		{
+			name: "no vars, no default values",
+			env:  map[string]string{},
+			want: &Config{},
+		},
+		{
+			name: "no vars, only defaults",
+			env:  map[string]string{},
+			defaults: &Config{
+				Port:        "6666",
+				UsersFile:   "/default/user/path",
+				RedirectURI: []string{"re", "direct", "uris"},
+			},
+			want: &Config{
+				Port:        "6666",
+				UsersFile:   "/default/user/path",
+				RedirectURI: []string{"re", "direct", "uris"},
+			},
+		},
+		{
+			name: "overriding default values",
+			env: map[string]string{
+				"PORT":         "1234",
+				"USERS_FILE":   "/path/to/users",
+				"REDIRECT_URI": "http://redirect/redirect",
+			},
+			defaults: &Config{
+				Port:        "6666",
+				UsersFile:   "/default/user/path",
+				RedirectURI: []string{"re", "direct", "uris"},
+			},
+			want: &Config{
+				Port:        "1234",
+				UsersFile:   "/path/to/users",
+				RedirectURI: []string{"http://redirect/redirect"},
+			},
+		},
+		{
+			name: "multiple redirect uris",
+			env: map[string]string{
+				"REDIRECT_URI": "http://host_1,http://host_2,http://host_3",
+			},
+			want: &Config{
+				RedirectURI: []string{
+					"http://host_1", "http://host_2", "http://host_3",
+				},
+			},
+		},
+	} {
+		t.Run(tc.name, func(t *testing.T) {
+			os.Clearenv()
+			for k, v := range tc.env {
+				os.Setenv(k, v)
+			}
+			cfg := FromEnvVars(tc.defaults)
+			if fmt.Sprint(cfg) != fmt.Sprint(tc.want) {
+				t.Errorf("Expected FromEnvVars()=%q, but got %q", tc.want, cfg)
+			}
+		})
+	}
+}

example/server/default/default.go

@@ -1,72 +0,0 @@
-package main
-
-import (
-	"context"
-	"crypto/sha256"
-	"html/template"
-	"log"
-	"net/http"
-
-	"github.com/gorilla/mux"
-
-	"github.com/caos/oidc/example/internal/mock"
-	"github.com/caos/oidc/pkg/op"
-)
-
-func main() {
-	ctx := context.Background()
-	port := "9998"
-	config := &op.Config{
-		Issuer:    "http://localhost:9998/",
-		CryptoKey: sha256.Sum256([]byte("test")),
-	}
-	storage := mock.NewAuthStorage()
-	handler, err := op.NewOpenIDProvider(ctx, config, storage, op.WithCustomTokenEndpoint(op.NewEndpoint("test")))
-	if err != nil {
-		log.Fatal(err)
-	}
-	router := handler.HttpHandler().(*mux.Router)
-	router.Methods("GET").Path("/login").HandlerFunc(HandleLogin)
-	router.Methods("POST").Path("/login").HandlerFunc(HandleCallback)
-	server := &http.Server{
-		Addr:    ":" + port,
-		Handler: router,
-	}
-	err = server.ListenAndServe()
-	if err != nil {
-		log.Fatal(err)
-	}
-	<-ctx.Done()
-}
-
-func HandleLogin(w http.ResponseWriter, r *http.Request) {
-	tpl := `
-	<!DOCTYPE html>
-	<html>
-		<head>
-			<meta charset="UTF-8">
-			<title>Login</title>
-		</head>
-		<body>
-			<form method="POST" action="/login">
-				<input name="client"/>
-				<button type="submit">Login</button>
-			</form>
-		</body>
-	</html>`
-	t, err := template.New("login").Parse(tpl)
-	if err != nil {
-		http.Error(w, err.Error(), http.StatusInternalServerError)
-		return
-	}
-	err = t.Execute(w, nil)
-	if err != nil {
-		http.Error(w, err.Error(), http.StatusInternalServerError)
-	}
-}
-
-func HandleCallback(w http.ResponseWriter, r *http.Request) {
-	r.ParseForm()
-	client := r.FormValue("client")
-	http.Redirect(w, r, "/authorize/"+client, http.StatusFound)
-}

example/server/dynamic/login.go

@@ -0,0 +1,113 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"html/template"
+	"net/http"
+
+	"github.com/go-chi/chi/v5"
+
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/op"
+)
+
+const (
+	queryAuthRequestID = "authRequestID"
+)
+
+var (
+	loginTmpl, _ = template.New("login").Parse(`
+	<!DOCTYPE html>
+	<html>
+		<head>
+			<meta charset="UTF-8">
+			<title>Login</title>
+		</head>
+		<body style="display: flex; align-items: center; justify-content: center; height: 100vh;">
+			<form method="POST" action="/login/username" style="height: 200px; width: 200px;">
+				<input type="hidden" name="id" value="{{.ID}}">
+				<div>
+					<label for="username">Username:</label>
+					<input id="username" name="username" style="width: 100%">
+				</div>
+				<div>
+					<label for="password">Password:</label>
+					<input id="password" name="password" style="width: 100%">
+				</div>
+				<p style="color:red; min-height: 1rem;">{{.Error}}</p>
+				<button type="submit">Login</button>
+			</form>
+		</body>
+	</html>`)
+)
+
+type login struct {
+	authenticate authenticate
+	router       chi.Router
+	callback     func(context.Context, string) string
+}
+
+func NewLogin(authenticate authenticate, callback func(context.Context, string) string, issuerInterceptor *op.IssuerInterceptor) *login {
+	l := &login{
+		authenticate: authenticate,
+		callback:     callback,
+	}
+	l.createRouter(issuerInterceptor)
+	return l
+}
+
+func (l *login) createRouter(issuerInterceptor *op.IssuerInterceptor) {
+	l.router = chi.NewRouter()
+	l.router.Get("/username", l.loginHandler)
+	l.router.With(issuerInterceptor.Handler).Post("/username", l.checkLoginHandler)
+}
+
+type authenticate interface {
+	CheckUsernamePassword(ctx context.Context, username, password, id string) error
+}
+
+func (l *login) loginHandler(w http.ResponseWriter, r *http.Request) {
+	err := r.ParseForm()
+	if err != nil {
+		http.Error(w, fmt.Sprintf("cannot parse form:%s", err), http.StatusInternalServerError)
+		return
+	}
+	//the oidc package will pass the id of the auth request as query parameter
+	//we will use this id through the login process and therefore pass it to the  login page
+	renderLogin(w, r.FormValue(queryAuthRequestID), nil)
+}
+
+func renderLogin(w http.ResponseWriter, id string, err error) {
+	var errMsg string
+	if err != nil {
+		errMsg = err.Error()
+	}
+	data := &struct {
+		ID    string
+		Error string
+	}{
+		ID:    id,
+		Error: errMsg,
+	}
+	err = loginTmpl.Execute(w, data)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+	}
+}
+
+func (l *login) checkLoginHandler(w http.ResponseWriter, r *http.Request) {
+	err := r.ParseForm()
+	if err != nil {
+		http.Error(w, fmt.Sprintf("cannot parse form:%s", err), http.StatusInternalServerError)
+		return
+	}
+	username := r.FormValue("username")
+	password := r.FormValue("password")
+	id := r.FormValue("id")
+	err = l.authenticate.CheckUsernamePassword(r.Context(), username, password, id)
+	if err != nil {
+		renderLogin(w, id, err)
+		return
+	}
+	http.Redirect(w, r, l.callback(r.Context(), id), http.StatusFound)
+}

example/server/dynamic/op.go

@@ -0,0 +1,138 @@
+package main
+
+import (
+	"context"
+	"crypto/sha256"
+	"fmt"
+	"log"
+	"net/http"
+
+	"github.com/go-chi/chi/v5"
+	"golang.org/x/text/language"
+
+	"git.christmann.info/LARA/zitadel-oidc/v3/example/server/storage"
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/op"
+)
+
+const (
+	pathLoggedOut = "/logged-out"
+)
+
+var (
+	hostnames = []string{
+		"localhost",  //note that calling 127.0.0.1 / ::1 won't work as the hostname does not match
+		"oidc.local", //add this to your hosts file (pointing to 127.0.0.1)
+		//feel free to add more...
+	}
+)
+
+func init() {
+	storage.RegisterClients(
+		storage.NativeClient("native"),
+		storage.WebClient("web", "secret"),
+		storage.WebClient("api", "secret"),
+	)
+}
+
+func main() {
+	ctx := context.Background()
+
+	port := "9998"
+	issuers := make([]string, len(hostnames))
+	for i, hostname := range hostnames {
+		issuers[i] = fmt.Sprintf("http://%s:%s/", hostname, port)
+	}
+
+	//the OpenID Provider requires a 32-byte key for (token) encryption
+	//be sure to create a proper crypto random key and manage it securely!
+	key := sha256.Sum256([]byte("test"))
+
+	router := chi.NewRouter()
+
+	//for simplicity, we provide a very small default page for users who have signed out
+	router.HandleFunc(pathLoggedOut, func(w http.ResponseWriter, req *http.Request) {
+		_, err := w.Write([]byte("signed out successfully"))
+		if err != nil {
+			log.Printf("error serving logged out page: %v", err)
+		}
+	})
+
+	//the OpenIDProvider interface needs a Storage interface handling various checks and state manipulations
+	//this might be the layer for accessing your database
+	//in this example it will be handled in-memory
+	//the NewMultiStorage is able to handle multiple issuers
+	storage := storage.NewMultiStorage(issuers)
+
+	//creation of the OpenIDProvider with the just created in-memory Storage
+	provider, err := newDynamicOP(ctx, storage, key)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	//the provider will only take care of the OpenID Protocol, so there must be some sort of UI for the login process
+	//for the simplicity of the example this means a simple page with username and password field
+	//be sure to provide an IssuerInterceptor with the IssuerFromRequest from the OP so the login can select / and pass it to the storage
+	l := NewLogin(storage, op.AuthCallbackURL(provider), op.NewIssuerInterceptor(provider.IssuerFromRequest))
+
+	//regardless of how many pages / steps there are in the process, the UI must be registered in the router,
+	//so we will direct all calls to /login to the login UI
+	router.Mount("/login/", http.StripPrefix("/login", l.router))
+
+	//we register the http handler of the OP on the root, so that the discovery endpoint (/.well-known/openid-configuration)
+	//is served on the correct path
+	//
+	//if your issuer ends with a path (e.g. http://localhost:9998/custom/path/),
+	//then you would have to set the path prefix (/custom/path/):
+	//router.PathPrefix("/custom/path/").Handler(http.StripPrefix("/custom/path", provider.HttpHandler()))
+	router.Mount("/", provider)
+
+	server := &http.Server{
+		Addr:    ":" + port,
+		Handler: router,
+	}
+	err = server.ListenAndServe()
+	if err != nil {
+		log.Fatal(err)
+	}
+	<-ctx.Done()
+}
+
+// newDynamicOP will create an OpenID Provider for localhost on a specified port with a given encryption key
+// and a predefined default logout uri
+// it will enable all options (see descriptions)
+func newDynamicOP(ctx context.Context, storage op.Storage, key [32]byte) (*op.Provider, error) {
+	config := &op.Config{
+		CryptoKey: key,
+
+		//will be used if the end_session endpoint is called without a post_logout_redirect_uri
+		DefaultLogoutRedirectURI: pathLoggedOut,
+
+		//enables code_challenge_method S256 for PKCE (and therefore PKCE in general)
+		CodeMethodS256: true,
+
+		//enables additional client_id/client_secret authentication by form post (not only HTTP Basic Auth)
+		AuthMethodPost: true,
+
+		//enables additional authentication by using private_key_jwt
+		AuthMethodPrivateKeyJWT: true,
+
+		//enables refresh_token grant use
+		GrantTypeRefreshToken: true,
+
+		//enables use of the `request` Object parameter
+		RequestObjectSupported: true,
+
+		//this example has only static texts (in English), so we'll set the here accordingly
+		SupportedUILocales: []language.Tag{language.English},
+	}
+	handler, err := op.NewDynamicOpenIDProvider("/", config, storage,
+		//we must explicitly allow the use of the http issuer
+		op.WithAllowInsecure(),
+		//as an example on how to customize an endpoint this will change the authorization_endpoint from /authorize to /auth
+		op.WithCustomAuthEndpoint(op.NewEndpoint("auth")),
+	)
+	if err != nil {
+		return nil, err
+	}
+	return handler, nil
+}

example/server/exampleop/device.go

@@ -0,0 +1,204 @@
+package exampleop
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/op"
+	"github.com/go-chi/chi/v5"
+	"github.com/gorilla/securecookie"
+	"github.com/sirupsen/logrus"
+)
+
+type deviceAuthenticate interface {
+	CheckUsernamePasswordSimple(username, password string) error
+	op.DeviceAuthorizationStorage
+
+	// GetDeviceAuthorizationByUserCode resturns the current state of the device authorization flow,
+	// identified by the user code.
+	GetDeviceAuthorizationByUserCode(ctx context.Context, userCode string) (*op.DeviceAuthorizationState, error)
+
+	// CompleteDeviceAuthorization marks a device authorization entry as Completed,
+	// identified by userCode. The Subject is added to the state, so that
+	// GetDeviceAuthorizatonState can use it to create a new Access Token.
+	CompleteDeviceAuthorization(ctx context.Context, userCode, subject string) error
+
+	// DenyDeviceAuthorization marks a device authorization entry as Denied.
+	DenyDeviceAuthorization(ctx context.Context, userCode string) error
+}
+
+type deviceLogin struct {
+	storage deviceAuthenticate
+	cookie  *securecookie.SecureCookie
+}
+
+func registerDeviceAuth(storage deviceAuthenticate, router chi.Router) {
+	l := &deviceLogin{
+		storage: storage,
+		cookie:  securecookie.New(securecookie.GenerateRandomKey(32), nil),
+	}
+
+	router.HandleFunc("/", l.userCodeHandler)
+	router.Post("/login", l.loginHandler)
+	router.HandleFunc("/confirm", l.confirmHandler)
+}
+
+func renderUserCode(w io.Writer, err error) {
+	data := struct {
+		Error string
+	}{
+		Error: errMsg(err),
+	}
+
+	if err := templates.ExecuteTemplate(w, "usercode", data); err != nil {
+		logrus.Error(err)
+	}
+}
+
+func renderDeviceLogin(w http.ResponseWriter, userCode string, err error) {
+	data := &struct {
+		UserCode string
+		Error    string
+	}{
+		UserCode: userCode,
+		Error:    errMsg(err),
+	}
+	if err = templates.ExecuteTemplate(w, "device_login", data); err != nil {
+		logrus.Error(err)
+	}
+}
+
+func renderConfirmPage(w http.ResponseWriter, username, clientID string, scopes []string) {
+	data := &struct {
+		Username string
+		ClientID string
+		Scopes   []string
+	}{
+		Username: username,
+		ClientID: clientID,
+		Scopes:   scopes,
+	}
+	if err := templates.ExecuteTemplate(w, "confirm_device", data); err != nil {
+		logrus.Error(err)
+	}
+}
+
+func (d *deviceLogin) userCodeHandler(w http.ResponseWriter, r *http.Request) {
+	err := r.ParseForm()
+	if err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+		renderUserCode(w, err)
+		return
+	}
+	userCode := r.Form.Get("user_code")
+	if userCode == "" {
+		if prompt, _ := url.QueryUnescape(r.Form.Get("prompt")); prompt != "" {
+			err = errors.New(prompt)
+		}
+		renderUserCode(w, err)
+		return
+	}
+
+	renderDeviceLogin(w, userCode, nil)
+}
+
+func redirectBack(w http.ResponseWriter, r *http.Request, prompt string) {
+	values := make(url.Values)
+	values.Set("prompt", url.QueryEscape(prompt))
+
+	url := url.URL{
+		Path:     "/device",
+		RawQuery: values.Encode(),
+	}
+	http.Redirect(w, r, url.String(), http.StatusSeeOther)
+}
+
+const userCodeCookieName = "user_code"
+
+type userCodeCookie struct {
+	UserCode string
+	UserName string
+}
+
+func (d *deviceLogin) loginHandler(w http.ResponseWriter, r *http.Request) {
+	if err := r.ParseForm(); err != nil {
+		redirectBack(w, r, err.Error())
+		return
+	}
+
+	userCode := r.PostForm.Get("user_code")
+	if userCode == "" {
+		redirectBack(w, r, "missing user_code in request")
+		return
+	}
+	username := r.PostForm.Get("username")
+	if username == "" {
+		redirectBack(w, r, "missing username in request")
+		return
+	}
+	password := r.PostForm.Get("password")
+	if password == "" {
+		redirectBack(w, r, "missing password in request")
+		return
+	}
+
+	if err := d.storage.CheckUsernamePasswordSimple(username, password); err != nil {
+		redirectBack(w, r, err.Error())
+		return
+	}
+	state, err := d.storage.GetDeviceAuthorizationByUserCode(r.Context(), userCode)
+	if err != nil {
+		redirectBack(w, r, err.Error())
+		return
+	}
+
+	encoded, err := d.cookie.Encode(userCodeCookieName, userCodeCookie{userCode, username})
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+	cookie := &http.Cookie{
+		Name:  userCodeCookieName,
+		Value: encoded,
+		Path:  "/",
+	}
+	http.SetCookie(w, cookie)
+	renderConfirmPage(w, username, state.ClientID, state.Scopes)
+}
+
+func (d *deviceLogin) confirmHandler(w http.ResponseWriter, r *http.Request) {
+	cookie, err := r.Cookie(userCodeCookieName)
+	if err != nil {
+		redirectBack(w, r, err.Error())
+		return
+	}
+	data := new(userCodeCookie)
+	if err = d.cookie.Decode(userCodeCookieName, cookie.Value, &data); err != nil {
+		redirectBack(w, r, err.Error())
+		return
+	}
+	if err = r.ParseForm(); err != nil {
+		redirectBack(w, r, err.Error())
+		return
+	}
+
+	action := r.Form.Get("action")
+	switch action {
+	case "allowed":
+		err = d.storage.CompleteDeviceAuthorization(r.Context(), data.UserCode, data.UserName)
+	case "denied":
+		err = d.storage.DenyDeviceAuthorization(r.Context(), data.UserCode)
+	default:
+		err = errors.New("action must be one of \"allow\" or \"deny\"")
+	}
+	if err != nil {
+		redirectBack(w, r, err.Error())
+		return
+	}
+
+	fmt.Fprintf(w, "Device authorization %s. You can now return to the device", action)
+}

example/server/exampleop/login.go

@@ -0,0 +1,77 @@
+package exampleop
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/op"
+	"github.com/go-chi/chi/v5"
+)
+
+type login struct {
+	authenticate authenticate
+	router       chi.Router
+	callback     func(context.Context, string) string
+}
+
+func NewLogin(authenticate authenticate, callback func(context.Context, string) string, issuerInterceptor *op.IssuerInterceptor) *login {
+	l := &login{
+		authenticate: authenticate,
+		callback:     callback,
+	}
+	l.createRouter(issuerInterceptor)
+	return l
+}
+
+func (l *login) createRouter(issuerInterceptor *op.IssuerInterceptor) {
+	l.router = chi.NewRouter()
+	l.router.Get("/username", l.loginHandler)
+	l.router.Post("/username", issuerInterceptor.HandlerFunc(l.checkLoginHandler))
+}
+
+type authenticate interface {
+	CheckUsernamePassword(username, password, id string) error
+}
+
+func (l *login) loginHandler(w http.ResponseWriter, r *http.Request) {
+	err := r.ParseForm()
+	if err != nil {
+		http.Error(w, fmt.Sprintf("cannot parse form:%s", err), http.StatusInternalServerError)
+		return
+	}
+	// the oidc package will pass the id of the auth request as query parameter
+	// we will use this id through the login process and therefore pass it to the login page
+	renderLogin(w, r.FormValue(queryAuthRequestID), nil)
+}
+
+func renderLogin(w http.ResponseWriter, id string, err error) {
+	data := &struct {
+		ID    string
+		Error string
+	}{
+		ID:    id,
+		Error: errMsg(err),
+	}
+	err = templates.ExecuteTemplate(w, "login", data)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+	}
+}
+
+func (l *login) checkLoginHandler(w http.ResponseWriter, r *http.Request) {
+	err := r.ParseForm()
+	if err != nil {
+		http.Error(w, fmt.Sprintf("cannot parse form:%s", err), http.StatusInternalServerError)
+		return
+	}
+	username := r.FormValue("username")
+	password := r.FormValue("password")
+	id := r.FormValue("id")
+	err = l.authenticate.CheckUsernamePassword(username, password, id)
+	if err != nil {
+		renderLogin(w, id, err)
+		return
+	}
+	http.Redirect(w, r, l.callback(r.Context(), id), http.StatusFound)
+}

example/server/exampleop/op.go

@@ -0,0 +1,136 @@
+package exampleop
+
+import (
+	"crypto/sha256"
+	"log"
+	"log/slog"
+	"net/http"
+	"sync/atomic"
+	"time"
+
+	"github.com/go-chi/chi/v5"
+	"github.com/zitadel/logging"
+	"golang.org/x/text/language"
+
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/op"
+)
+
+const (
+	pathLoggedOut = "/logged-out"
+)
+
+type Storage interface {
+	op.Storage
+	authenticate
+	deviceAuthenticate
+}
+
+// simple counter for request IDs
+var counter atomic.Int64
+
+// SetupServer creates an OIDC server with Issuer=http://localhost:<port>
+//
+// Use one of the pre-made clients in storage/clients.go or register a new one.
+func SetupServer(issuer string, storage Storage, logger *slog.Logger, wrapServer bool, extraOptions ...op.Option) chi.Router {
+	// the OpenID Provider requires a 32-byte key for (token) encryption
+	// be sure to create a proper crypto random key and manage it securely!
+	key := sha256.Sum256([]byte("test"))
+
+	router := chi.NewRouter()
+	router.Use(logging.Middleware(
+		logging.WithLogger(logger),
+		logging.WithIDFunc(func() slog.Attr {
+			return slog.Int64("id", counter.Add(1))
+		}),
+	))
+
+	// for simplicity, we provide a very small default page for users who have signed out
+	router.HandleFunc(pathLoggedOut, func(w http.ResponseWriter, req *http.Request) {
+		w.Write([]byte("signed out successfully"))
+		// no need to check/log error, this will be handled by the middleware.
+	})
+
+	// creation of the OpenIDProvider with the just created in-memory Storage
+	provider, err := newOP(storage, issuer, key, logger, extraOptions...)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	//the provider will only take care of the OpenID Protocol, so there must be some sort of UI for the login process
+	//for the simplicity of the example this means a simple page with username and password field
+	//be sure to provide an IssuerInterceptor with the IssuerFromRequest from the OP so the login can select / and pass it to the storage
+	l := NewLogin(storage, op.AuthCallbackURL(provider), op.NewIssuerInterceptor(provider.IssuerFromRequest))
+
+	// regardless of how many pages / steps there are in the process, the UI must be registered in the router,
+	// so we will direct all calls to /login to the login UI
+	router.Mount("/login/", http.StripPrefix("/login", l.router))
+
+	router.Route("/device", func(r chi.Router) {
+		registerDeviceAuth(storage, r)
+	})
+
+	handler := http.Handler(provider)
+	if wrapServer {
+		handler = op.RegisterLegacyServer(op.NewLegacyServer(provider, *op.DefaultEndpoints), op.AuthorizeCallbackHandler(provider))
+	}
+
+	// we register the http handler of the OP on the root, so that the discovery endpoint (/.well-known/openid-configuration)
+	// is served on the correct path
+	//
+	// if your issuer ends with a path (e.g. http://localhost:9998/custom/path/),
+	// then you would have to set the path prefix (/custom/path/)
+	router.Mount("/", handler)
+
+	return router
+}
+
+// newOP will create an OpenID Provider for localhost on a specified port with a given encryption key
+// and a predefined default logout uri
+// it will enable all options (see descriptions)
+func newOP(storage op.Storage, issuer string, key [32]byte, logger *slog.Logger, extraOptions ...op.Option) (op.OpenIDProvider, error) {
+	config := &op.Config{
+		CryptoKey: key,
+
+		// will be used if the end_session endpoint is called without a post_logout_redirect_uri
+		DefaultLogoutRedirectURI: pathLoggedOut,
+
+		// enables code_challenge_method S256 for PKCE (and therefore PKCE in general)
+		CodeMethodS256: true,
+
+		// enables additional client_id/client_secret authentication by form post (not only HTTP Basic Auth)
+		AuthMethodPost: true,
+
+		// enables additional authentication by using private_key_jwt
+		AuthMethodPrivateKeyJWT: true,
+
+		// enables refresh_token grant use
+		GrantTypeRefreshToken: true,
+
+		// enables use of the `request` Object parameter
+		RequestObjectSupported: true,
+
+		// this example has only static texts (in English), so we'll set the here accordingly
+		SupportedUILocales: []language.Tag{language.English},
+
+		DeviceAuthorization: op.DeviceAuthorizationConfig{
+			Lifetime:     5 * time.Minute,
+			PollInterval: 5 * time.Second,
+			UserFormPath: "/device",
+			UserCode:     op.UserCodeBase20,
+		},
+	}
+	handler, err := op.NewOpenIDProvider(issuer, config, storage,
+		append([]op.Option{
+			//we must explicitly allow the use of the http issuer
+			op.WithAllowInsecure(),
+			// as an example on how to customize an endpoint this will change the authorization_endpoint from /authorize to /auth
+			op.WithCustomAuthEndpoint(op.NewEndpoint("auth")),
+			// Pass our logger to the OP
+			op.WithLogger(logger.WithGroup("op")),
+		}, extraOptions...)...,
+	)
+	if err != nil {
+		return nil, err
+	}
+	return handler, nil
+}

example/server/exampleop/templates.go

@@ -0,0 +1,26 @@
+package exampleop
+
+import (
+	"embed"
+	"html/template"
+
+	"github.com/sirupsen/logrus"
+)
+
+var (
+	//go:embed templates
+	templateFS embed.FS
+	templates  = template.Must(template.ParseFS(templateFS, "templates/*.html"))
+)
+
+const (
+	queryAuthRequestID = "authRequestID"
+)
+
+func errMsg(err error) string {
+	if err == nil {
+		return ""
+	}
+	logrus.Error(err)
+	return err.Error()
+}

example/server/exampleop/templates/confirm_device.html

@@ -0,0 +1,25 @@
+{{ define "confirm_device" -}}
+<!DOCTYPE html>
+<html>
+    <head>
+        <meta charset="UTF-8">
+        <title>Confirm device authorization</title>
+        <style>
+            .green{
+                background-color: green
+            }
+            .red{
+                background-color: red
+            }
+        </style>
+    </head>
+    <body>
+        <h1>Welcome back {{.Username}}!</h1>
+        <p>
+            You are about to grant device {{.ClientID}} access to the following scopes: {{.Scopes}}.
+        </p>
+        <button onclick="location.href='./confirm?action=allowed'" type="button" class="green">Allow</button>
+        <button onclick="location.href='./confirm?action=denied'" type="button" class="red">Deny</button>
+    </body>
+</html>
+{{- end }}

example/server/exampleop/templates/device_login.html

@@ -0,0 +1,29 @@
+{{ define "device_login" -}}
+<!DOCTYPE html>
+<html>
+    <head>
+        <meta charset="UTF-8">
+        <title>Login</title>
+    </head>
+    <body style="display: flex; align-items: center; justify-content: center; height: 100vh;">
+        <form method="POST" action="/device/login" style="height: 200px; width: 200px;">
+
+            <input type="hidden" name="user_code" value="{{.UserCode}}">
+
+            <div>
+                <label for="username">Username:</label>
+                <input id="username" name="username" style="width: 100%">
+            </div>
+
+            <div>
+                <label for="password">Password:</label>
+                <input id="password" name="password" style="width: 100%">
+            </div>
+
+            <p style="color:red; min-height: 1rem;">{{.Error}}</p>
+
+            <button type="submit">Login</button>
+        </form>
+    </body>
+</html>
+{{- end }}

example/server/exampleop/templates/login.html

@@ -0,0 +1,29 @@
+{{ define "login" -}}
+<!DOCTYPE html>
+<html>
+    <head>
+        <meta charset="UTF-8">
+        <title>Login</title>
+    </head>
+    <body style="display: flex; align-items: center; justify-content: center; height: 100vh;">
+        <form method="POST" action="/login/username" style="height: 200px; width: 200px;">
+
+            <input type="hidden" name="id" value="{{.ID}}">
+
+            <div>
+                <label for="username">Username:</label>
+                <input id="username" name="username" style="width: 100%">
+            </div>
+
+            <div>
+                <label for="password">Password:</label>
+                <input id="password" name="password" style="width: 100%">
+            </div>
+
+            <p style="color:red; min-height: 1rem;">{{.Error}}</p>
+
+            <button type="submit">Login</button>
+        </form>
+    </body>
+</html>`
+{{- end }}

example/server/exampleop/templates/usercode.html

@@ -0,0 +1,21 @@
+{{ define "usercode" -}}
+<!DOCTYPE html>
+<html>
+    <head>
+        <meta charset="UTF-8">
+        <title>Device authorization</title>
+    </head>
+    <body style="display: flex; align-items: center; justify-content: center; height: 100vh;">
+        <form method="POST" style="height: 200px; width: 200px;">
+            <h1>Device authorization</h1>
+            <div>
+                <label for="user_code">Code:</label>
+                <input id="user_code" name="user_code" style="width: 100%">
+            </div>
+            <p style="color:red; min-height: 1rem;">{{.Error}}</p>
+
+            <button type="submit">Login</button>
+        </form>
+    </body>
+</html>
+{{- end }}

example/server/main.go

@@ -0,0 +1,59 @@
+package main
+
+import (
+	"fmt"
+	"log/slog"
+	"net/http"
+	"os"
+
+	"git.christmann.info/LARA/zitadel-oidc/v3/example/server/config"
+	"git.christmann.info/LARA/zitadel-oidc/v3/example/server/exampleop"
+	"git.christmann.info/LARA/zitadel-oidc/v3/example/server/storage"
+)
+
+func getUserStore(cfg *config.Config) (storage.UserStore, error) {
+	if cfg.UsersFile == "" {
+		return storage.NewUserStore(fmt.Sprintf("http://localhost:%s/", cfg.Port)), nil
+	}
+	return storage.StoreFromFile(cfg.UsersFile)
+}
+
+func main() {
+	cfg := config.FromEnvVars(&config.Config{Port: "9998"})
+	logger := slog.New(
+		slog.NewTextHandler(os.Stderr, &slog.HandlerOptions{
+			AddSource: true,
+			Level:     slog.LevelDebug,
+		}),
+	)
+
+	//which gives us the issuer: http://localhost:9998/
+	issuer := fmt.Sprintf("http://localhost:%s/", cfg.Port)
+
+	storage.RegisterClients(
+		storage.NativeClient("native", cfg.RedirectURI...),
+		storage.WebClient("web", "secret", cfg.RedirectURI...),
+		storage.WebClient("api", "secret", cfg.RedirectURI...),
+	)
+
+	// the OpenIDProvider interface needs a Storage interface handling various checks and state manipulations
+	// this might be the layer for accessing your database
+	// in this example it will be handled in-memory
+	store, err := getUserStore(cfg)
+	if err != nil {
+		logger.Error("cannot create UserStore", "error", err)
+		os.Exit(1)
+	}
+	storage := storage.NewStorage(store)
+	router := exampleop.SetupServer(issuer, storage, logger, false)
+
+	server := &http.Server{
+		Addr:    ":" + cfg.Port,
+		Handler: router,
+	}
+	logger.Info("server listening, press ctrl+c to stop", "addr", issuer)
+	if server.ListenAndServe() != http.ErrServerClosed {
+		logger.Error("server terminated", "error", err)
+		os.Exit(1)
+	}
+}

example/server/service-key1.json

@@ -0,0 +1 @@
+{"type":"serviceaccount","keyId":"key1","key":"-----BEGIN RSA PRIVATE KEY-----\nMIICXgIBAAKBgQD21E+180rCAzp15zy2X/JOYYHtxYhF51pWCsITeChJd7sFWxp1\ntxSHTiomQYBiBWgcCavsdu/VLPQJhO3PTIyglxc1XRGsM48oDT5MkFsAVDvbjuWk\nF0lstQyw4pr8Wg0Ecf1aL6YlvVKB9h5rAgZ9T+elNJ7q5takMAvNhu7zMQIDAQAB\nAoGAeLRw2qjEaUZM43WWchVPmFcEw/MyZgTyX1tZd03uXacolUDtGp3ScyydXiHw\nF39PX063fabYOCaInNMdvJ9RsQz2OcZuS/K6NOmWhzBfLgs4Y1tU6ijoY/gBjHgu\nCV0KjvoWIfEtKl/On/wTrAnUStFzrc7U4dpKFP1fy2ZTTnECQQD8aP2QOxmKUyfg\nBAjfonpkrNeaTRNwTULTvEHFiLyaeFd1PAvsDiKZtpk6iHLb99mQZkVVtAK5qgQ4\n1OI72jkVAkEA+lcAamuZAM+gIiUhbHA7BfX9OVgyGDD2tx5g/kxhMUmK6hIiO6Ul\n0nw5KfrCEUU3AzrM7HejUg3q61SYcXTgrQJBALhrzbhwNf0HPP9Ec2dSw7KDRxSK\ndEV9bfJefn/hpEwI2X3i3aMfwNAmxlYqFCH8OY5z6vzvhX46ZtNPV+z7SPECQQDq\nApXi5P27YlpgULEzup2R7uZsymLZdjvJ5V3pmOBpwENYlublNnVqkrCk60CqADdy\nj26rxRIoS9ZDcWqm9AhpAkEAyrNXBMJh08ghBMb3NYPFfr/bftRJSrGjhBPuJ5qr\nXzWaXhYVMMh3OSAwzHBJbA1ffdQJuH2ebL99Ur5fpBcbVw==\n-----END RSA PRIVATE KEY-----\n","userId":"service"}

example/server/storage/client.go

@@ -0,0 +1,235 @@
+package storage
+
+import (
+	"time"
+
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/oidc"
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/op"
+)
+
+var (
+	// we use the default login UI and pass the (auth request) id
+	defaultLoginURL = func(id string) string {
+		return "/login/username?authRequestID=" + id
+	}
+
+	// clients to be used by the storage interface
+	clients = map[string]*Client{}
+)
+
+// Client represents the storage model of an OAuth/OIDC client
+// this could also be your database model
+type Client struct {
+	id                             string
+	secret                         string
+	redirectURIs                   []string
+	applicationType                op.ApplicationType
+	authMethod                     oidc.AuthMethod
+	loginURL                       func(string) string
+	responseTypes                  []oidc.ResponseType
+	grantTypes                     []oidc.GrantType
+	accessTokenType                op.AccessTokenType
+	devMode                        bool
+	idTokenUserinfoClaimsAssertion bool
+	clockSkew                      time.Duration
+	postLogoutRedirectURIGlobs     []string
+	redirectURIGlobs               []string
+}
+
+// GetID must return the client_id
+func (c *Client) GetID() string {
+	return c.id
+}
+
+// RedirectURIs must return the registered redirect_uris for Code and Implicit Flow
+func (c *Client) RedirectURIs() []string {
+	return c.redirectURIs
+}
+
+// PostLogoutRedirectURIs must return the registered post_logout_redirect_uris for sign-outs
+func (c *Client) PostLogoutRedirectURIs() []string {
+	return []string{}
+}
+
+// ApplicationType must return the type of the client (app, native, user agent)
+func (c *Client) ApplicationType() op.ApplicationType {
+	return c.applicationType
+}
+
+// AuthMethod must return the authentication method (client_secret_basic, client_secret_post, none, private_key_jwt)
+func (c *Client) AuthMethod() oidc.AuthMethod {
+	return c.authMethod
+}
+
+// ResponseTypes must return all allowed response types (code, id_token token, id_token)
+// these must match with the allowed grant types
+func (c *Client) ResponseTypes() []oidc.ResponseType {
+	return c.responseTypes
+}
+
+// GrantTypes must return all allowed grant types (authorization_code, refresh_token, urn:ietf:params:oauth:grant-type:jwt-bearer)
+func (c *Client) GrantTypes() []oidc.GrantType {
+	return c.grantTypes
+}
+
+// LoginURL will be called to redirect the user (agent) to the login UI
+// you could implement some logic here to redirect the users to different login UIs depending on the client
+func (c *Client) LoginURL(id string) string {
+	return c.loginURL(id)
+}
+
+// AccessTokenType must return the type of access token the client uses (Bearer (opaque) or JWT)
+func (c *Client) AccessTokenType() op.AccessTokenType {
+	return c.accessTokenType
+}
+
+// IDTokenLifetime must return the lifetime of the client's id_tokens
+func (c *Client) IDTokenLifetime() time.Duration {
+	return 1 * time.Hour
+}
+
+// DevMode enables the use of non-compliant configs such as redirect_uris (e.g. http schema for user agent client)
+func (c *Client) DevMode() bool {
+	return c.devMode
+}
+
+// RestrictAdditionalIdTokenScopes allows specifying which custom scopes shall be asserted into the id_token
+func (c *Client) RestrictAdditionalIdTokenScopes() func(scopes []string) []string {
+	return func(scopes []string) []string {
+		return scopes
+	}
+}
+
+// RestrictAdditionalAccessTokenScopes allows specifying which custom scopes shall be asserted into the JWT access_token
+func (c *Client) RestrictAdditionalAccessTokenScopes() func(scopes []string) []string {
+	return func(scopes []string) []string {
+		return scopes
+	}
+}
+
+// IsScopeAllowed enables Client specific custom scopes validation
+// in this example we allow the CustomScope for all clients
+func (c *Client) IsScopeAllowed(scope string) bool {
+	return scope == CustomScope
+}
+
+// IDTokenUserinfoClaimsAssertion allows specifying if claims of scope profile, email, phone and address are asserted into the id_token
+// even if an access token if issued which violates the OIDC Core spec
+// (5.4. Requesting Claims using Scope Values: https://openid.net/specs/openid-connect-core-1_0.html#ScopeClaims)
+// some clients though require that e.g. email is always in the id_token when requested even if an access_token is issued
+func (c *Client) IDTokenUserinfoClaimsAssertion() bool {
+	return c.idTokenUserinfoClaimsAssertion
+}
+
+// ClockSkew enables clients to instruct the OP to apply a clock skew on the various times and expirations
+// (subtract from issued_at, add to expiration, ...)
+func (c *Client) ClockSkew() time.Duration {
+	return c.clockSkew
+}
+
+// RegisterClients enables you to register clients for the example implementation
+// there are some clients (web and native) to try out different cases
+// add more if necessary
+//
+// RegisterClients should be called before the Storage is used so that there are
+// no race conditions.
+func RegisterClients(registerClients ...*Client) {
+	for _, client := range registerClients {
+		clients[client.id] = client
+	}
+}
+
+// NativeClient will create a client of type native, which will always use PKCE and allow the use of refresh tokens
+// user-defined redirectURIs may include:
+// - http://localhost without port specification (e.g. http://localhost/auth/callback)
+// - custom protocol (e.g. custom://auth/callback)
+// (the examples will be used as default, if none is provided)
+func NativeClient(id string, redirectURIs ...string) *Client {
+	if len(redirectURIs) == 0 {
+		redirectURIs = []string{
+			"http://localhost/auth/callback",
+			"custom://auth/callback",
+		}
+	}
+	return &Client{
+		id:                             id,
+		secret:                         "", // no secret needed (due to PKCE)
+		redirectURIs:                   redirectURIs,
+		applicationType:                op.ApplicationTypeNative,
+		authMethod:                     oidc.AuthMethodNone,
+		loginURL:                       defaultLoginURL,
+		responseTypes:                  []oidc.ResponseType{oidc.ResponseTypeCode},
+		grantTypes:                     []oidc.GrantType{oidc.GrantTypeCode, oidc.GrantTypeRefreshToken},
+		accessTokenType:                op.AccessTokenTypeBearer,
+		devMode:                        false,
+		idTokenUserinfoClaimsAssertion: false,
+		clockSkew:                      0,
+	}
+}
+
+// WebClient will create a client of type web, which will always use Basic Auth and allow the use of refresh tokens
+// user-defined redirectURIs may include:
+// - http://localhost with port specification (e.g. http://localhost:9999/auth/callback)
+// (the example will be used as default, if none is provided)
+func WebClient(id, secret string, redirectURIs ...string) *Client {
+	if len(redirectURIs) == 0 {
+		redirectURIs = []string{
+			"http://localhost:9999/auth/callback",
+		}
+	}
+	return &Client{
+		id:                             id,
+		secret:                         secret,
+		redirectURIs:                   redirectURIs,
+		applicationType:                op.ApplicationTypeWeb,
+		authMethod:                     oidc.AuthMethodBasic,
+		loginURL:                       defaultLoginURL,
+		responseTypes:                  []oidc.ResponseType{oidc.ResponseTypeCode, oidc.ResponseTypeIDTokenOnly, oidc.ResponseTypeIDToken},
+		grantTypes:                     []oidc.GrantType{oidc.GrantTypeCode, oidc.GrantTypeRefreshToken, oidc.GrantTypeTokenExchange},
+		accessTokenType:                op.AccessTokenTypeBearer,
+		devMode:                        true,
+		idTokenUserinfoClaimsAssertion: false,
+		clockSkew:                      0,
+	}
+}
+
+// DeviceClient creates a device client with Basic authentication.
+func DeviceClient(id, secret string) *Client {
+	return &Client{
+		id:                             id,
+		secret:                         secret,
+		redirectURIs:                   nil,
+		applicationType:                op.ApplicationTypeWeb,
+		authMethod:                     oidc.AuthMethodBasic,
+		loginURL:                       defaultLoginURL,
+		responseTypes:                  []oidc.ResponseType{oidc.ResponseTypeCode},
+		grantTypes:                     []oidc.GrantType{oidc.GrantTypeDeviceCode},
+		accessTokenType:                op.AccessTokenTypeBearer,
+		devMode:                        false,
+		idTokenUserinfoClaimsAssertion: false,
+		clockSkew:                      0,
+	}
+}
+
+type hasRedirectGlobs struct {
+	*Client
+}
+
+// RedirectURIGlobs provide wildcarding for additional valid redirects
+func (c hasRedirectGlobs) RedirectURIGlobs() []string {
+	return c.redirectURIGlobs
+}
+
+// PostLogoutRedirectURIGlobs provide extra wildcarding for additional valid redirects
+func (c hasRedirectGlobs) PostLogoutRedirectURIGlobs() []string {
+	return c.postLogoutRedirectURIGlobs
+}
+
+// RedirectGlobsClient wraps the client in a op.HasRedirectGlobs
+// only if DevMode is enabled.
+func RedirectGlobsClient(client *Client) op.Client {
+	if client.devMode {
+		return hasRedirectGlobs{client}
+	}
+	return client
+}

example/server/storage/oidc.go

@@ -0,0 +1,230 @@
+package storage
+
+import (
+	"log/slog"
+	"time"
+
+	"golang.org/x/text/language"
+
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/oidc"
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/op"
+)
+
+const (
+	// CustomScope is an example for how to use custom scopes in this library
+	//(in this scenario, when requested, it will return a custom claim)
+	CustomScope = "custom_scope"
+
+	// CustomClaim is an example for how to return custom claims with this library
+	CustomClaim = "custom_claim"
+
+	// CustomScopeImpersonatePrefix is an example scope prefix for passing user id to impersonate using token exchage
+	CustomScopeImpersonatePrefix = "custom_scope:impersonate:"
+)
+
+type AuthRequest struct {
+	ID            string
+	CreationDate  time.Time
+	ApplicationID string
+	CallbackURI   string
+	TransferState string
+	Prompt        []string
+	UiLocales     []language.Tag
+	LoginHint     string
+	MaxAuthAge    *time.Duration
+	UserID        string
+	Scopes        []string
+	ResponseType  oidc.ResponseType
+	ResponseMode  oidc.ResponseMode
+	Nonce         string
+	CodeChallenge *OIDCCodeChallenge
+
+	done     bool
+	authTime time.Time
+}
+
+// LogValue allows you to define which fields will be logged.
+// Implements the [slog.LogValuer]
+func (a *AuthRequest) LogValue() slog.Value {
+	return slog.GroupValue(
+		slog.String("id", a.ID),
+		slog.Time("creation_date", a.CreationDate),
+		slog.Any("scopes", a.Scopes),
+		slog.String("response_type", string(a.ResponseType)),
+		slog.String("app_id", a.ApplicationID),
+		slog.String("callback_uri", a.CallbackURI),
+	)
+}
+
+func (a *AuthRequest) GetID() string {
+	return a.ID
+}
+
+func (a *AuthRequest) GetACR() string {
+	return "" // we won't handle acr in this example
+}
+
+func (a *AuthRequest) GetAMR() []string {
+	// this example only uses password for authentication
+	if a.done {
+		return []string{"pwd"}
+	}
+	return nil
+}
+
+func (a *AuthRequest) GetAudience() []string {
+	return []string{a.ApplicationID} // this example will always just use the client_id as audience
+}
+
+func (a *AuthRequest) GetAuthTime() time.Time {
+	return a.authTime
+}
+
+func (a *AuthRequest) GetClientID() string {
+	return a.ApplicationID
+}
+
+func (a *AuthRequest) GetCodeChallenge() *oidc.CodeChallenge {
+	return CodeChallengeToOIDC(a.CodeChallenge)
+}
+
+func (a *AuthRequest) GetNonce() string {
+	return a.Nonce
+}
+
+func (a *AuthRequest) GetRedirectURI() string {
+	return a.CallbackURI
+}
+
+func (a *AuthRequest) GetResponseType() oidc.ResponseType {
+	return a.ResponseType
+}
+
+func (a *AuthRequest) GetResponseMode() oidc.ResponseMode {
+	return a.ResponseMode
+}
+
+func (a *AuthRequest) GetScopes() []string {
+	return a.Scopes
+}
+
+func (a *AuthRequest) GetState() string {
+	return a.TransferState
+}
+
+func (a *AuthRequest) GetSubject() string {
+	return a.UserID
+}
+
+func (a *AuthRequest) Done() bool {
+	return a.done
+}
+
+func PromptToInternal(oidcPrompt oidc.SpaceDelimitedArray) []string {
+	prompts := make([]string, 0, len(oidcPrompt))
+	for _, oidcPrompt := range oidcPrompt {
+		switch oidcPrompt {
+		case oidc.PromptNone,
+			oidc.PromptLogin,
+			oidc.PromptConsent,
+			oidc.PromptSelectAccount:
+			prompts = append(prompts, oidcPrompt)
+		}
+	}
+	return prompts
+}
+
+func MaxAgeToInternal(maxAge *uint) *time.Duration {
+	if maxAge == nil {
+		return nil
+	}
+	dur := time.Duration(*maxAge) * time.Second
+	return &dur
+}
+
+func authRequestToInternal(authReq *oidc.AuthRequest, userID string) *AuthRequest {
+	return &AuthRequest{
+		CreationDate:  time.Now(),
+		ApplicationID: authReq.ClientID,
+		CallbackURI:   authReq.RedirectURI,
+		TransferState: authReq.State,
+		Prompt:        PromptToInternal(authReq.Prompt),
+		UiLocales:     authReq.UILocales,
+		LoginHint:     authReq.LoginHint,
+		MaxAuthAge:    MaxAgeToInternal(authReq.MaxAge),
+		UserID:        userID,
+		Scopes:        authReq.Scopes,
+		ResponseType:  authReq.ResponseType,
+		ResponseMode:  authReq.ResponseMode,
+		Nonce:         authReq.Nonce,
+		CodeChallenge: &OIDCCodeChallenge{
+			Challenge: authReq.CodeChallenge,
+			Method:    string(authReq.CodeChallengeMethod),
+		},
+	}
+}
+
+type AuthRequestWithSessionState struct {
+	*AuthRequest
+	SessionState string
+}
+
+func (a *AuthRequestWithSessionState) GetSessionState() string {
+	return a.SessionState
+}
+
+type OIDCCodeChallenge struct {
+	Challenge string
+	Method    string
+}
+
+func CodeChallengeToOIDC(challenge *OIDCCodeChallenge) *oidc.CodeChallenge {
+	if challenge == nil {
+		return nil
+	}
+	challengeMethod := oidc.CodeChallengeMethodPlain
+	if challenge.Method == "S256" {
+		challengeMethod = oidc.CodeChallengeMethodS256
+	}
+	return &oidc.CodeChallenge{
+		Challenge: challenge.Challenge,
+		Method:    challengeMethod,
+	}
+}
+
+// RefreshTokenRequestFromBusiness will simply wrap the storage RefreshToken to implement the op.RefreshTokenRequest interface
+func RefreshTokenRequestFromBusiness(token *RefreshToken) op.RefreshTokenRequest {
+	return &RefreshTokenRequest{token}
+}
+
+type RefreshTokenRequest struct {
+	*RefreshToken
+}
+
+func (r *RefreshTokenRequest) GetAMR() []string {
+	return r.AMR
+}
+
+func (r *RefreshTokenRequest) GetAudience() []string {
+	return r.Audience
+}
+
+func (r *RefreshTokenRequest) GetAuthTime() time.Time {
+	return r.AuthTime
+}
+
+func (r *RefreshTokenRequest) GetClientID() string {
+	return r.ApplicationID
+}
+
+func (r *RefreshTokenRequest) GetScopes() []string {
+	return r.Scopes
+}
+
+func (r *RefreshTokenRequest) GetSubject() string {
+	return r.UserID
+}
+
+func (r *RefreshTokenRequest) SetCurrentScopes(scopes []string) {
+	r.Scopes = scopes
+}

example/server/storage/storage.go

@@ -0,0 +1,933 @@
+package storage
+
+import (
+	"context"
+	"crypto/rand"
+	"crypto/rsa"
+	"errors"
+	"fmt"
+	"math/big"
+	"strings"
+	"sync"
+	"time"
+
+	jose "github.com/go-jose/go-jose/v4"
+	"github.com/google/uuid"
+
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/oidc"
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/op"
+)
+
+// serviceKey1 is a public key which will be used for the JWT Profile Authorization Grant
+// the corresponding private key is in the service-key1.json (for demonstration purposes)
+var serviceKey1 = &rsa.PublicKey{
+	N: func() *big.Int {
+		n, _ := new(big.Int).SetString("00f6d44fb5f34ac2033a75e73cb65ff24e6181edc58845e75a560ac21378284977bb055b1a75b714874e2a2641806205681c09abec76efd52cf40984edcf4c8ca09717355d11ac338f280d3e4c905b00543bdb8ee5a417496cb50cb0e29afc5a0d0471fd5a2fa625bd5281f61e6b02067d4fe7a5349eeae6d6a4300bcd86eef331", 16)
+		return n
+	}(),
+	E: 65537,
+}
+
+var (
+	_ op.Storage                  = &Storage{}
+	_ op.ClientCredentialsStorage = &Storage{}
+)
+
+// storage implements the op.Storage interface
+// typically you would implement this as a layer on top of your database
+// for simplicity this example keeps everything in-memory
+type Storage struct {
+	lock          sync.Mutex
+	authRequests  map[string]*AuthRequest
+	codes         map[string]string
+	tokens        map[string]*Token
+	clients       map[string]*Client
+	userStore     UserStore
+	services      map[string]Service
+	refreshTokens map[string]*RefreshToken
+	signingKey    signingKey
+	deviceCodes   map[string]deviceAuthorizationEntry
+	userCodes     map[string]string
+	serviceUsers  map[string]*Client
+}
+
+type signingKey struct {
+	id        string
+	algorithm jose.SignatureAlgorithm
+	key       *rsa.PrivateKey
+}
+
+func (s *signingKey) SignatureAlgorithm() jose.SignatureAlgorithm {
+	return s.algorithm
+}
+
+func (s *signingKey) Key() any {
+	return s.key
+}
+
+func (s *signingKey) ID() string {
+	return s.id
+}
+
+type publicKey struct {
+	signingKey
+}
+
+func (s *publicKey) ID() string {
+	return s.id
+}
+
+func (s *publicKey) Algorithm() jose.SignatureAlgorithm {
+	return s.algorithm
+}
+
+func (s *publicKey) Use() string {
+	return "sig"
+}
+
+func (s *publicKey) Key() any {
+	return &s.key.PublicKey
+}
+
+func NewStorage(userStore UserStore) *Storage {
+	return NewStorageWithClients(userStore, clients)
+}
+
+func NewStorageWithClients(userStore UserStore, clients map[string]*Client) *Storage {
+	key, _ := rsa.GenerateKey(rand.Reader, 2048)
+	return &Storage{
+		authRequests:  make(map[string]*AuthRequest),
+		codes:         make(map[string]string),
+		tokens:        make(map[string]*Token),
+		refreshTokens: make(map[string]*RefreshToken),
+		clients:       clients,
+		userStore:     userStore,
+		services: map[string]Service{
+			userStore.ExampleClientID(): {
+				keys: map[string]*rsa.PublicKey{
+					"key1": serviceKey1,
+				},
+			},
+		},
+		signingKey: signingKey{
+			id:        uuid.NewString(),
+			algorithm: jose.RS256,
+			key:       key,
+		},
+		deviceCodes: make(map[string]deviceAuthorizationEntry),
+		userCodes:   make(map[string]string),
+		serviceUsers: map[string]*Client{
+			"sid1": {
+				id:     "sid1",
+				secret: "verysecret",
+				grantTypes: []oidc.GrantType{
+					oidc.GrantTypeClientCredentials,
+				},
+				accessTokenType: op.AccessTokenTypeBearer,
+			},
+		},
+	}
+}
+
+// CheckUsernamePassword implements the `authenticate` interface of the login
+func (s *Storage) CheckUsernamePassword(username, password, id string) error {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+	request, ok := s.authRequests[id]
+	if !ok {
+		return fmt.Errorf("request not found")
+	}
+
+	// for demonstration purposes we'll check we'll have a simple user store and
+	// a plain text password.  For real world scenarios, be sure to have the password
+	// hashed and salted (e.g. using bcrypt)
+	user := s.userStore.GetUserByUsername(username)
+	if user != nil && user.Password == password {
+		// be sure to set user id into the auth request after the user was checked,
+		// so that you'll be able to get more information about the user after the login
+		request.UserID = user.ID
+
+		// you will have to change some state on the request to guide the user through possible multiple steps of the login process
+		// in this example we'll simply check the username / password and set a boolean to true
+		// therefore we will also just check this boolean if the request / login has been finished
+		request.done = true
+
+		request.authTime = time.Now()
+
+		return nil
+	}
+	return fmt.Errorf("username or password wrong")
+}
+
+func (s *Storage) CheckUsernamePasswordSimple(username, password string) error {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+
+	user := s.userStore.GetUserByUsername(username)
+	if user != nil && user.Password == password {
+		return nil
+	}
+	return fmt.Errorf("username or password wrong")
+}
+
+// CreateAuthRequest implements the op.Storage interface
+// it will be called after parsing and validation of the authentication request
+func (s *Storage) CreateAuthRequest(ctx context.Context, authReq *oidc.AuthRequest, userID string) (op.AuthRequest, error) {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+
+	if len(authReq.Prompt) == 1 && authReq.Prompt[0] == "none" {
+		// With prompt=none, there is no way for the user to log in
+		// so return error right away.
+		return nil, oidc.ErrLoginRequired()
+	}
+
+	// typically, you'll fill your storage / storage model with the information of the passed object
+	request := authRequestToInternal(authReq, userID)
+
+	// you'll also have to create a unique id for the request (this might be done by your database; we'll use a uuid)
+	request.ID = uuid.NewString()
+
+	// and save it in your database (for demonstration purposed we will use a simple map)
+	s.authRequests[request.ID] = request
+
+	// finally, return the request (which implements the AuthRequest interface of the OP
+	return request, nil
+}
+
+// AuthRequestByID implements the op.Storage interface
+// it will be called after the Login UI redirects back to the OIDC endpoint
+func (s *Storage) AuthRequestByID(ctx context.Context, id string) (op.AuthRequest, error) {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+	request, ok := s.authRequests[id]
+	if !ok {
+		return nil, fmt.Errorf("request not found")
+	}
+	return request, nil
+}
+
+// AuthRequestByCode implements the op.Storage interface
+// it will be called after parsing and validation of the token request (in an authorization code flow)
+func (s *Storage) AuthRequestByCode(ctx context.Context, code string) (op.AuthRequest, error) {
+	// for this example we read the id by code and then get the request by id
+	requestID, ok := func() (string, bool) {
+		s.lock.Lock()
+		defer s.lock.Unlock()
+		requestID, ok := s.codes[code]
+		return requestID, ok
+	}()
+	if !ok {
+		return nil, fmt.Errorf("code invalid or expired")
+	}
+	return s.AuthRequestByID(ctx, requestID)
+}
+
+// SaveAuthCode implements the op.Storage interface
+// it will be called after the authentication has been successful and before redirecting the user agent to the redirect_uri
+// (in an authorization code flow)
+func (s *Storage) SaveAuthCode(ctx context.Context, id string, code string) error {
+	// for this example we'll just save the authRequestID to the code
+	s.lock.Lock()
+	defer s.lock.Unlock()
+	s.codes[code] = id
+	return nil
+}
+
+// DeleteAuthRequest implements the op.Storage interface
+// it will be called after creating the token response (id and access tokens) for a valid
+// - authentication request (in an implicit flow)
+// - token request (in an authorization code flow)
+func (s *Storage) DeleteAuthRequest(ctx context.Context, id string) error {
+	// you can simply delete all reference to the auth request
+	s.lock.Lock()
+	defer s.lock.Unlock()
+	delete(s.authRequests, id)
+	for code, requestID := range s.codes {
+		if id == requestID {
+			delete(s.codes, code)
+			return nil
+		}
+	}
+	return nil
+}
+
+// CreateAccessToken implements the op.Storage interface
+// it will be called for all requests able to return an access token (Authorization Code Flow, Implicit Flow, JWT Profile, ...)
+func (s *Storage) CreateAccessToken(ctx context.Context, request op.TokenRequest) (string, time.Time, error) {
+	var applicationID string
+	switch req := request.(type) {
+	case *AuthRequest:
+		// if authenticated for an app (auth code / implicit flow) we must save the client_id to the token
+		applicationID = req.ApplicationID
+	case op.TokenExchangeRequest:
+		applicationID = req.GetClientID()
+	}
+
+	token, err := s.accessToken(applicationID, "", request.GetSubject(), request.GetAudience(), request.GetScopes())
+	if err != nil {
+		return "", time.Time{}, err
+	}
+	return token.ID, token.Expiration, nil
+}
+
+// CreateAccessAndRefreshTokens implements the op.Storage interface
+// it will be called for all requests able to return an access and refresh token (Authorization Code Flow, Refresh Token Request)
+func (s *Storage) CreateAccessAndRefreshTokens(ctx context.Context, request op.TokenRequest, currentRefreshToken string) (accessTokenID string, newRefreshToken string, expiration time.Time, err error) {
+	// generate tokens via token exchange flow if request is relevant
+	if teReq, ok := request.(op.TokenExchangeRequest); ok {
+		return s.exchangeRefreshToken(ctx, teReq)
+	}
+
+	// get the information depending on the request type / implementation
+	applicationID, authTime, amr := getInfoFromRequest(request)
+
+	// if currentRefreshToken is empty (Code Flow) we will have to create a new refresh token
+	if currentRefreshToken == "" {
+		refreshTokenID := uuid.NewString()
+		accessToken, err := s.accessToken(applicationID, refreshTokenID, request.GetSubject(), request.GetAudience(), request.GetScopes())
+		if err != nil {
+			return "", "", time.Time{}, err
+		}
+		refreshToken, err := s.createRefreshToken(accessToken, amr, authTime)
+		if err != nil {
+			return "", "", time.Time{}, err
+		}
+		return accessToken.ID, refreshToken, accessToken.Expiration, nil
+	}
+
+	// if we get here, the currentRefreshToken was not empty, so the call is a refresh token request
+	// we therefore will have to check the currentRefreshToken and renew the refresh token
+
+	newRefreshToken = uuid.NewString()
+
+	accessToken, err := s.accessToken(applicationID, newRefreshToken, request.GetSubject(), request.GetAudience(), request.GetScopes())
+	if err != nil {
+		return "", "", time.Time{}, err
+	}
+
+	if err := s.renewRefreshToken(currentRefreshToken, newRefreshToken, accessToken.ID); err != nil {
+		return "", "", time.Time{}, err
+	}
+
+	return accessToken.ID, newRefreshToken, accessToken.Expiration, nil
+}
+
+func (s *Storage) exchangeRefreshToken(ctx context.Context, request op.TokenExchangeRequest) (accessTokenID string, newRefreshToken string, expiration time.Time, err error) {
+	applicationID := request.GetClientID()
+	authTime := request.GetAuthTime()
+
+	refreshTokenID := uuid.NewString()
+	accessToken, err := s.accessToken(applicationID, refreshTokenID, request.GetSubject(), request.GetAudience(), request.GetScopes())
+	if err != nil {
+		return "", "", time.Time{}, err
+	}
+
+	refreshToken, err := s.createRefreshToken(accessToken, nil, authTime)
+	if err != nil {
+		return "", "", time.Time{}, err
+	}
+
+	return accessToken.ID, refreshToken, accessToken.Expiration, nil
+}
+
+// TokenRequestByRefreshToken implements the op.Storage interface
+// it will be called after parsing and validation of the refresh token request
+func (s *Storage) TokenRequestByRefreshToken(ctx context.Context, refreshToken string) (op.RefreshTokenRequest, error) {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+	token, ok := s.refreshTokens[refreshToken]
+	if !ok {
+		return nil, fmt.Errorf("invalid refresh_token")
+	}
+	return RefreshTokenRequestFromBusiness(token), nil
+}
+
+// TerminateSession implements the op.Storage interface
+// it will be called after the user signed out, therefore the access and refresh token of the user of this client must be removed
+func (s *Storage) TerminateSession(ctx context.Context, userID string, clientID string) error {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+	for _, token := range s.tokens {
+		if token.ApplicationID == clientID && token.Subject == userID {
+			delete(s.tokens, token.ID)
+			delete(s.refreshTokens, token.RefreshTokenID)
+		}
+	}
+	return nil
+}
+
+// GetRefreshTokenInfo looks up a refresh token and returns the token id and user id.
+// If given something that is not a refresh token, it must return error.
+func (s *Storage) GetRefreshTokenInfo(ctx context.Context, clientID string, token string) (userID string, tokenID string, err error) {
+	refreshToken, ok := s.refreshTokens[token]
+	if !ok {
+		return "", "", op.ErrInvalidRefreshToken
+	}
+	return refreshToken.UserID, refreshToken.ID, nil
+}
+
+// RevokeToken implements the op.Storage interface
+// it will be called after parsing and validation of the token revocation request
+func (s *Storage) RevokeToken(ctx context.Context, tokenIDOrToken string, userID string, clientID string) *oidc.Error {
+	// a single token was requested to be removed
+	s.lock.Lock()
+	defer s.lock.Unlock()
+	accessToken, ok := s.tokens[tokenIDOrToken] // tokenID
+	if ok {
+		if accessToken.ApplicationID != clientID {
+			return oidc.ErrInvalidClient().WithDescription("token was not issued for this client")
+		}
+		// if it is an access token, just remove it
+		// you could also remove the corresponding refresh token if really necessary
+		delete(s.tokens, accessToken.ID)
+		return nil
+	}
+	refreshToken, ok := s.refreshTokens[tokenIDOrToken] // token
+	if !ok {
+		// if the token is neither an access nor a refresh token, just ignore it, the expected behaviour of
+		// being not valid (anymore) is achieved
+		return nil
+	}
+	if refreshToken.ApplicationID != clientID {
+		return oidc.ErrInvalidClient().WithDescription("token was not issued for this client")
+	}
+	delete(s.refreshTokens, refreshToken.ID)
+	// if it is a refresh token, you will have to remove the access token as well
+	delete(s.tokens, refreshToken.AccessToken)
+	return nil
+}
+
+// SigningKey implements the op.Storage interface
+// it will be called when creating the OpenID Provider
+func (s *Storage) SigningKey(ctx context.Context) (op.SigningKey, error) {
+	// in this example the signing key is a static rsa.PrivateKey and the algorithm used is RS256
+	// you would obviously have a more complex implementation and store / retrieve the key from your database as well
+	return &s.signingKey, nil
+}
+
+// SignatureAlgorithms implements the op.Storage interface
+// it will be called to get the sign
+func (s *Storage) SignatureAlgorithms(context.Context) ([]jose.SignatureAlgorithm, error) {
+	return []jose.SignatureAlgorithm{s.signingKey.algorithm}, nil
+}
+
+// KeySet implements the op.Storage interface
+// it will be called to get the current (public) keys, among others for the keys_endpoint or for validating access_tokens on the userinfo_endpoint, ...
+func (s *Storage) KeySet(ctx context.Context) ([]op.Key, error) {
+	// as mentioned above, this example only has a single signing key without key rotation,
+	// so it will directly use its public key
+	//
+	// when using key rotation you typically would store the public keys alongside the private keys in your database
+	// and give both of them an expiration date, with the public key having a longer lifetime
+	return []op.Key{&publicKey{s.signingKey}}, nil
+}
+
+// GetClientByClientID implements the op.Storage interface
+// it will be called whenever information (type, redirect_uris, ...) about the client behind the client_id is needed
+func (s *Storage) GetClientByClientID(ctx context.Context, clientID string) (op.Client, error) {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+	client, ok := s.clients[clientID]
+	if !ok {
+		return nil, fmt.Errorf("client not found")
+	}
+	return RedirectGlobsClient(client), nil
+}
+
+// AuthorizeClientIDSecret implements the op.Storage interface
+// it will be called for validating the client_id, client_secret on token or introspection requests
+func (s *Storage) AuthorizeClientIDSecret(ctx context.Context, clientID, clientSecret string) error {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+	client, ok := s.clients[clientID]
+	if !ok {
+		return fmt.Errorf("client not found")
+	}
+	// for this example we directly check the secret
+	// obviously you would not have the secret in plain text, but rather hashed and salted (e.g. using bcrypt)
+	if client.secret != clientSecret {
+		return fmt.Errorf("invalid secret")
+	}
+	return nil
+}
+
+// SetUserinfoFromScopes implements the op.Storage interface.
+// Provide an empty implementation and use SetUserinfoFromRequest instead.
+func (s *Storage) SetUserinfoFromScopes(ctx context.Context, userinfo *oidc.UserInfo, userID, clientID string, scopes []string) error {
+	return nil
+}
+
+// SetUserinfoFromRequests implements the op.CanSetUserinfoFromRequest interface.  In the
+// next major release, it will be required for op.Storage.
+// It will be called for the creation of an id_token, so we'll just pass it to the private function without any further check
+func (s *Storage) SetUserinfoFromRequest(ctx context.Context, userinfo *oidc.UserInfo, token op.IDTokenRequest, scopes []string) error {
+	return s.setUserinfo(ctx, userinfo, token.GetSubject(), token.GetClientID(), scopes)
+}
+
+// SetUserinfoFromToken implements the op.Storage interface
+// it will be called for the userinfo endpoint, so we read the token and pass the information from that to the private function
+func (s *Storage) SetUserinfoFromToken(ctx context.Context, userinfo *oidc.UserInfo, tokenID, subject, origin string) error {
+	token, ok := func() (*Token, bool) {
+		s.lock.Lock()
+		defer s.lock.Unlock()
+		token, ok := s.tokens[tokenID]
+		return token, ok
+	}()
+	if !ok {
+		return fmt.Errorf("token is invalid or has expired")
+	}
+	// the userinfo endpoint should support CORS. If it's not possible to specify a specific origin in the CORS handler,
+	// and you have to specify a wildcard (*) origin, then you could also check here if the origin which called the userinfo endpoint here directly
+	// note that the origin can be empty (if called by a web client)
+	//
+	// if origin != "" {
+	//	client, ok := s.clients[token.ApplicationID]
+	//	if !ok {
+	//		return fmt.Errorf("client not found")
+	//	}
+	//	if err := checkAllowedOrigins(client.allowedOrigins, origin); err != nil {
+	//		return err
+	//	}
+	//}
+	if token.Expiration.Before(time.Now()) {
+		return fmt.Errorf("token is expired")
+	}
+	return s.setUserinfo(ctx, userinfo, token.Subject, token.ApplicationID, token.Scopes)
+}
+
+// SetIntrospectionFromToken implements the op.Storage interface
+// it will be called for the introspection endpoint, so we read the token and pass the information from that to the private function
+func (s *Storage) SetIntrospectionFromToken(ctx context.Context, introspection *oidc.IntrospectionResponse, tokenID, subject, clientID string) error {
+	token, ok := func() (*Token, bool) {
+		s.lock.Lock()
+		defer s.lock.Unlock()
+		token, ok := s.tokens[tokenID]
+		return token, ok
+	}()
+	if !ok {
+		return fmt.Errorf("token is invalid or has expired")
+	}
+	// check if the client is part of the requested audience
+	for _, aud := range token.Audience {
+		if aud == clientID {
+			// the introspection response only has to return a boolean (active) if the token is active
+			// this will automatically be done by the library if you don't return an error
+			// you can also return further information about the user / associated token
+			// e.g. the userinfo (equivalent to userinfo endpoint)
+
+			userInfo := new(oidc.UserInfo)
+			err := s.setUserinfo(ctx, userInfo, subject, clientID, token.Scopes)
+			if err != nil {
+				return err
+			}
+			introspection.SetUserInfo(userInfo)
+			//...and also the requested scopes...
+			introspection.Scope = token.Scopes
+			//...and the client the token was issued to
+			introspection.ClientID = token.ApplicationID
+			return nil
+		}
+	}
+	return fmt.Errorf("token is not valid for this client")
+}
+
+// GetPrivateClaimsFromScopes implements the op.Storage interface
+// it will be called for the creation of a JWT access token to assert claims for custom scopes
+func (s *Storage) GetPrivateClaimsFromScopes(ctx context.Context, userID, clientID string, scopes []string) (claims map[string]any, err error) {
+	return s.getPrivateClaimsFromScopes(ctx, userID, clientID, scopes)
+}
+
+func (s *Storage) getPrivateClaimsFromScopes(ctx context.Context, userID, clientID string, scopes []string) (claims map[string]any, err error) {
+	for _, scope := range scopes {
+		switch scope {
+		case CustomScope:
+			claims = appendClaim(claims, CustomClaim, customClaim(clientID))
+		}
+	}
+	return claims, nil
+}
+
+// GetKeyByIDAndClientID implements the op.Storage interface
+// it will be called to validate the signatures of a JWT (JWT Profile Grant and Authentication)
+func (s *Storage) GetKeyByIDAndClientID(ctx context.Context, keyID, clientID string) (*jose.JSONWebKey, error) {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+	service, ok := s.services[clientID]
+	if !ok {
+		return nil, fmt.Errorf("clientID not found")
+	}
+	key, ok := service.keys[keyID]
+	if !ok {
+		return nil, fmt.Errorf("key not found")
+	}
+	return &jose.JSONWebKey{
+		KeyID: keyID,
+		Use:   "sig",
+		Key:   key,
+	}, nil
+}
+
+// ValidateJWTProfileScopes implements the op.Storage interface
+// it will be called to validate the scopes of a JWT Profile Authorization Grant request
+func (s *Storage) ValidateJWTProfileScopes(ctx context.Context, userID string, scopes []string) ([]string, error) {
+	allowedScopes := make([]string, 0)
+	for _, scope := range scopes {
+		if scope == oidc.ScopeOpenID {
+			allowedScopes = append(allowedScopes, scope)
+		}
+	}
+	return allowedScopes, nil
+}
+
+// Health implements the op.Storage interface
+func (s *Storage) Health(ctx context.Context) error {
+	return nil
+}
+
+// createRefreshToken will store a refresh_token in-memory based on the provided information
+func (s *Storage) createRefreshToken(accessToken *Token, amr []string, authTime time.Time) (string, error) {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+	token := &RefreshToken{
+		ID:            accessToken.RefreshTokenID,
+		Token:         accessToken.RefreshTokenID,
+		AuthTime:      authTime,
+		AMR:           amr,
+		ApplicationID: accessToken.ApplicationID,
+		UserID:        accessToken.Subject,
+		Audience:      accessToken.Audience,
+		Expiration:    time.Now().Add(5 * time.Hour),
+		Scopes:        accessToken.Scopes,
+		AccessToken:   accessToken.ID,
+	}
+	s.refreshTokens[token.ID] = token
+	return token.Token, nil
+}
+
+// renewRefreshToken checks the provided refresh_token and creates a new one based on the current
+//
+// [Refresh Token Rotation] is implemented.
+//
+// [Refresh Token Rotation]: https://www.rfc-editor.org/rfc/rfc6819#section-5.2.2.3
+func (s *Storage) renewRefreshToken(currentRefreshToken, newRefreshToken, newAccessToken string) error {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+	refreshToken, ok := s.refreshTokens[currentRefreshToken]
+	if !ok {
+		return fmt.Errorf("invalid refresh token")
+	}
+	// deletes the refresh token
+	delete(s.refreshTokens, currentRefreshToken)
+
+	// delete the access token which was issued based on this refresh token
+	delete(s.tokens, refreshToken.AccessToken)
+
+	if refreshToken.Expiration.Before(time.Now()) {
+		return fmt.Errorf("expired refresh token")
+	}
+
+	// creates a new refresh token based on the current one
+	refreshToken.Token = newRefreshToken
+	refreshToken.ID = newRefreshToken
+	refreshToken.Expiration = time.Now().Add(5 * time.Hour)
+	refreshToken.AccessToken = newAccessToken
+	s.refreshTokens[newRefreshToken] = refreshToken
+	return nil
+}
+
+// accessToken will store an access_token in-memory based on the provided information
+func (s *Storage) accessToken(applicationID, refreshTokenID, subject string, audience, scopes []string) (*Token, error) {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+	token := &Token{
+		ID:             uuid.NewString(),
+		ApplicationID:  applicationID,
+		RefreshTokenID: refreshTokenID,
+		Subject:        subject,
+		Audience:       audience,
+		Expiration:     time.Now().Add(5 * time.Minute),
+		Scopes:         scopes,
+	}
+	s.tokens[token.ID] = token
+	return token, nil
+}
+
+// setUserinfo sets the info based on the user, scopes and if necessary the clientID
+func (s *Storage) setUserinfo(ctx context.Context, userInfo *oidc.UserInfo, userID, clientID string, scopes []string) (err error) {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+	user := s.userStore.GetUserByID(userID)
+	if user == nil {
+		return fmt.Errorf("user not found")
+	}
+	for _, scope := range scopes {
+		switch scope {
+		case oidc.ScopeOpenID:
+			userInfo.Subject = user.ID
+		case oidc.ScopeEmail:
+			userInfo.Email = user.Email
+			userInfo.EmailVerified = oidc.Bool(user.EmailVerified)
+		case oidc.ScopeProfile:
+			userInfo.PreferredUsername = user.Username
+			userInfo.Name = user.FirstName + " " + user.LastName
+			userInfo.FamilyName = user.LastName
+			userInfo.GivenName = user.FirstName
+			userInfo.Locale = oidc.NewLocale(user.PreferredLanguage)
+		case oidc.ScopePhone:
+			userInfo.PhoneNumber = user.Phone
+			userInfo.PhoneNumberVerified = user.PhoneVerified
+		case CustomScope:
+			// you can also have a custom scope and assert public or custom claims based on that
+			userInfo.AppendClaims(CustomClaim, customClaim(clientID))
+		}
+	}
+	return nil
+}
+
+// ValidateTokenExchangeRequest implements the op.TokenExchangeStorage interface
+// it will be called to validate parsed Token Exchange Grant request
+func (s *Storage) ValidateTokenExchangeRequest(ctx context.Context, request op.TokenExchangeRequest) error {
+	if request.GetRequestedTokenType() == "" {
+		request.SetRequestedTokenType(oidc.RefreshTokenType)
+	}
+
+	// Just an example, some use cases might need this use case
+	if request.GetExchangeSubjectTokenType() == oidc.IDTokenType && request.GetRequestedTokenType() == oidc.RefreshTokenType {
+		return errors.New("exchanging id_token to refresh_token is not supported")
+	}
+
+	// Check impersonation permissions
+	if request.GetExchangeActor() == "" && !s.userStore.GetUserByID(request.GetExchangeSubject()).IsAdmin {
+		return errors.New("user doesn't have impersonation permission")
+	}
+
+	allowedScopes := make([]string, 0)
+	for _, scope := range request.GetScopes() {
+		if scope == oidc.ScopeAddress {
+			continue
+		}
+
+		if strings.HasPrefix(scope, CustomScopeImpersonatePrefix) {
+			subject := strings.TrimPrefix(scope, CustomScopeImpersonatePrefix)
+			request.SetSubject(subject)
+		}
+
+		allowedScopes = append(allowedScopes, scope)
+	}
+
+	request.SetCurrentScopes(allowedScopes)
+
+	return nil
+}
+
+// ValidateTokenExchangeRequest implements the op.TokenExchangeStorage interface
+// Common use case is to store request for audit purposes. For this example we skip the storing.
+func (s *Storage) CreateTokenExchangeRequest(ctx context.Context, request op.TokenExchangeRequest) error {
+	return nil
+}
+
+// GetPrivateClaimsFromScopesForTokenExchange implements the op.TokenExchangeStorage interface
+// it will be called for the creation of an exchanged JWT access token to assert claims for custom scopes
+// plus adding token exchange specific claims related to delegation or impersonation
+func (s *Storage) GetPrivateClaimsFromTokenExchangeRequest(ctx context.Context, request op.TokenExchangeRequest) (claims map[string]any, err error) {
+	claims, err = s.getPrivateClaimsFromScopes(ctx, "", request.GetClientID(), request.GetScopes())
+	if err != nil {
+		return nil, err
+	}
+
+	for k, v := range s.getTokenExchangeClaims(ctx, request) {
+		claims = appendClaim(claims, k, v)
+	}
+
+	return claims, nil
+}
+
+// SetUserinfoFromScopesForTokenExchange implements the op.TokenExchangeStorage interface
+// it will be called for the creation of an id_token - we are using the same private function as for other flows,
+// plus adding token exchange specific claims related to delegation or impersonation
+func (s *Storage) SetUserinfoFromTokenExchangeRequest(ctx context.Context, userinfo *oidc.UserInfo, request op.TokenExchangeRequest) error {
+	err := s.setUserinfo(ctx, userinfo, request.GetSubject(), request.GetClientID(), request.GetScopes())
+	if err != nil {
+		return err
+	}
+
+	for k, v := range s.getTokenExchangeClaims(ctx, request) {
+		userinfo.AppendClaims(k, v)
+	}
+
+	return nil
+}
+
+func (s *Storage) getTokenExchangeClaims(ctx context.Context, request op.TokenExchangeRequest) (claims map[string]any) {
+	for _, scope := range request.GetScopes() {
+		switch {
+		case strings.HasPrefix(scope, CustomScopeImpersonatePrefix) && request.GetExchangeActor() == "":
+			// Set actor subject claim for impersonation flow
+			claims = appendClaim(claims, "act", map[string]any{
+				"sub": request.GetExchangeSubject(),
+			})
+		}
+	}
+
+	// Set actor subject claim for delegation flow
+	// if request.GetExchangeActor() != "" {
+	// 	claims = appendClaim(claims, "act", map[string]any{
+	// 		"sub": request.GetExchangeActor(),
+	// 	})
+	// }
+
+	return claims
+}
+
+// getInfoFromRequest returns the clientID, authTime and amr depending on the op.TokenRequest type / implementation
+func getInfoFromRequest(req op.TokenRequest) (clientID string, authTime time.Time, amr []string) {
+	authReq, ok := req.(*AuthRequest) // Code Flow (with scope offline_access)
+	if ok {
+		return authReq.ApplicationID, authReq.authTime, authReq.GetAMR()
+	}
+	refreshReq, ok := req.(*RefreshTokenRequest) // Refresh Token Request
+	if ok {
+		return refreshReq.ApplicationID, refreshReq.AuthTime, refreshReq.AMR
+	}
+	return "", time.Time{}, nil
+}
+
+// customClaim demonstrates how to return custom claims based on provided information
+func customClaim(clientID string) map[string]any {
+	return map[string]any{
+		"client": clientID,
+		"other":  "stuff",
+	}
+}
+
+func appendClaim(claims map[string]any, claim string, value any) map[string]any {
+	if claims == nil {
+		claims = make(map[string]any)
+	}
+	claims[claim] = value
+	return claims
+}
+
+type deviceAuthorizationEntry struct {
+	deviceCode string
+	userCode   string
+	state      *op.DeviceAuthorizationState
+}
+
+func (s *Storage) StoreDeviceAuthorization(ctx context.Context, clientID, deviceCode, userCode string, expires time.Time, scopes []string) error {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+
+	if _, ok := s.clients[clientID]; !ok {
+		return errors.New("client not found")
+	}
+
+	if _, ok := s.userCodes[userCode]; ok {
+		return op.ErrDuplicateUserCode
+	}
+
+	s.deviceCodes[deviceCode] = deviceAuthorizationEntry{
+		deviceCode: deviceCode,
+		userCode:   userCode,
+		state: &op.DeviceAuthorizationState{
+			ClientID: clientID,
+			Scopes:   scopes,
+			Expires:  expires,
+		},
+	}
+
+	s.userCodes[userCode] = deviceCode
+	return nil
+}
+
+func (s *Storage) GetDeviceAuthorizatonState(ctx context.Context, clientID, deviceCode string) (*op.DeviceAuthorizationState, error) {
+	if ctx.Err() != nil {
+		return nil, ctx.Err()
+	}
+
+	s.lock.Lock()
+	defer s.lock.Unlock()
+
+	entry, ok := s.deviceCodes[deviceCode]
+	if !ok || entry.state.ClientID != clientID {
+		return nil, errors.New("device code not found for client") // is there a standard not found error in the framework?
+	}
+
+	return entry.state, nil
+}
+
+func (s *Storage) GetDeviceAuthorizationByUserCode(ctx context.Context, userCode string) (*op.DeviceAuthorizationState, error) {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+
+	entry, ok := s.deviceCodes[s.userCodes[userCode]]
+	if !ok {
+		return nil, errors.New("user code not found")
+	}
+
+	return entry.state, nil
+}
+
+func (s *Storage) CompleteDeviceAuthorization(ctx context.Context, userCode, subject string) error {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+
+	entry, ok := s.deviceCodes[s.userCodes[userCode]]
+	if !ok {
+		return errors.New("user code not found")
+	}
+
+	entry.state.Subject = subject
+	entry.state.Done = true
+	return nil
+}
+
+func (s *Storage) DenyDeviceAuthorization(ctx context.Context, userCode string) error {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+
+	s.deviceCodes[s.userCodes[userCode]].state.Denied = true
+	return nil
+}
+
+// AuthRequestDone is used by testing and is not required to implement op.Storage
+func (s *Storage) AuthRequestDone(id string) error {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+
+	if req, ok := s.authRequests[id]; ok {
+		req.done = true
+		return nil
+	}
+
+	return errors.New("request not found")
+}
+
+func (s *Storage) ClientCredentials(ctx context.Context, clientID, clientSecret string) (op.Client, error) {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+
+	client, ok := s.serviceUsers[clientID]
+	if !ok {
+		return nil, errors.New("wrong service user or password")
+	}
+	if client.secret != clientSecret {
+		return nil, errors.New("wrong service user or password")
+	}
+
+	return client, nil
+}
+
+func (s *Storage) ClientCredentialsTokenRequest(ctx context.Context, clientID string, scopes []string) (op.TokenRequest, error) {
+	client, ok := s.serviceUsers[clientID]
+	if !ok {
+		return nil, errors.New("wrong service user or password")
+	}
+
+	return &oidc.JWTTokenRequest{
+		Subject:  client.id,
+		Audience: []string{clientID},
+		Scopes:   scopes,
+	}, nil
+}

example/server/storage/storage_dynamic.go

@@ -0,0 +1,281 @@
+package storage
+
+import (
+	"context"
+	"time"
+
+	jose "github.com/go-jose/go-jose/v4"
+
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/oidc"
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/op"
+)
+
+type multiStorage struct {
+	issuers map[string]*Storage
+}
+
+// NewMultiStorage implements the op.Storage interface by wrapping multiple storage structs
+// and selecting them by the calling issuer
+func NewMultiStorage(issuers []string) *multiStorage {
+	s := make(map[string]*Storage)
+	for _, issuer := range issuers {
+		s[issuer] = NewStorage(NewUserStore(issuer))
+	}
+	return &multiStorage{issuers: s}
+}
+
+// CheckUsernamePassword implements the `authenticate` interface of the login
+func (s *multiStorage) CheckUsernamePassword(ctx context.Context, username, password, id string) error {
+	storage, err := s.storageFromContext(ctx)
+	if err != nil {
+		return err
+	}
+	return storage.CheckUsernamePassword(username, password, id)
+}
+
+// CreateAuthRequest implements the op.Storage interface
+// it will be called after parsing and validation of the authentication request
+func (s *multiStorage) CreateAuthRequest(ctx context.Context, authReq *oidc.AuthRequest, userID string) (op.AuthRequest, error) {
+	storage, err := s.storageFromContext(ctx)
+	if err != nil {
+		return nil, err
+	}
+	return storage.CreateAuthRequest(ctx, authReq, userID)
+}
+
+// AuthRequestByID implements the op.Storage interface
+// it will be called after the Login UI redirects back to the OIDC endpoint
+func (s *multiStorage) AuthRequestByID(ctx context.Context, id string) (op.AuthRequest, error) {
+	storage, err := s.storageFromContext(ctx)
+	if err != nil {
+		return nil, err
+	}
+	return storage.AuthRequestByID(ctx, id)
+}
+
+// AuthRequestByCode implements the op.Storage interface
+// it will be called after parsing and validation of the token request (in an authorization code flow)
+func (s *multiStorage) AuthRequestByCode(ctx context.Context, code string) (op.AuthRequest, error) {
+	storage, err := s.storageFromContext(ctx)
+	if err != nil {
+		return nil, err
+	}
+	return storage.AuthRequestByCode(ctx, code)
+}
+
+// SaveAuthCode implements the op.Storage interface
+// it will be called after the authentication has been successful and before redirecting the user agent to the redirect_uri
+// (in an authorization code flow)
+func (s *multiStorage) SaveAuthCode(ctx context.Context, id string, code string) error {
+	storage, err := s.storageFromContext(ctx)
+	if err != nil {
+		return err
+	}
+	return storage.SaveAuthCode(ctx, id, code)
+}
+
+// DeleteAuthRequest implements the op.Storage interface
+// it will be called after creating the token response (id and access tokens) for a valid
+// - authentication request (in an implicit flow)
+// - token request (in an authorization code flow)
+func (s *multiStorage) DeleteAuthRequest(ctx context.Context, id string) error {
+	storage, err := s.storageFromContext(ctx)
+	if err != nil {
+		return err
+	}
+	return storage.DeleteAuthRequest(ctx, id)
+}
+
+// CreateAccessToken implements the op.Storage interface
+// it will be called for all requests able to return an access token (Authorization Code Flow, Implicit Flow, JWT Profile, ...)
+func (s *multiStorage) CreateAccessToken(ctx context.Context, request op.TokenRequest) (string, time.Time, error) {
+	storage, err := s.storageFromContext(ctx)
+	if err != nil {
+		return "", time.Time{}, err
+	}
+	return storage.CreateAccessToken(ctx, request)
+}
+
+// CreateAccessAndRefreshTokens implements the op.Storage interface
+// it will be called for all requests able to return an access and refresh token (Authorization Code Flow, Refresh Token Request)
+func (s *multiStorage) CreateAccessAndRefreshTokens(ctx context.Context, request op.TokenRequest, currentRefreshToken string) (accessTokenID string, newRefreshToken string, expiration time.Time, err error) {
+	storage, err := s.storageFromContext(ctx)
+	if err != nil {
+		return "", "", time.Time{}, err
+	}
+	return storage.CreateAccessAndRefreshTokens(ctx, request, currentRefreshToken)
+}
+
+// TokenRequestByRefreshToken implements the op.Storage interface
+// it will be called after parsing and validation of the refresh token request
+func (s *multiStorage) TokenRequestByRefreshToken(ctx context.Context, refreshToken string) (op.RefreshTokenRequest, error) {
+	storage, err := s.storageFromContext(ctx)
+	if err != nil {
+		return nil, err
+	}
+	return storage.TokenRequestByRefreshToken(ctx, refreshToken)
+}
+
+// TerminateSession implements the op.Storage interface
+// it will be called after the user signed out, therefore the access and refresh token of the user of this client must be removed
+func (s *multiStorage) TerminateSession(ctx context.Context, userID string, clientID string) error {
+	storage, err := s.storageFromContext(ctx)
+	if err != nil {
+		return err
+	}
+	return storage.TerminateSession(ctx, userID, clientID)
+}
+
+// GetRefreshTokenInfo looks up a refresh token and returns the token id and user id.
+// If given something that is not a refresh token, it must return error.
+func (s *multiStorage) GetRefreshTokenInfo(ctx context.Context, clientID string, token string) (userID string, tokenID string, err error) {
+	storage, err := s.storageFromContext(ctx)
+	if err != nil {
+		return "", "", err
+	}
+	return storage.GetRefreshTokenInfo(ctx, clientID, token)
+}
+
+// RevokeToken implements the op.Storage interface
+// it will be called after parsing and validation of the token revocation request
+func (s *multiStorage) RevokeToken(ctx context.Context, token string, userID string, clientID string) *oidc.Error {
+	storage, err := s.storageFromContext(ctx)
+	if err != nil {
+		return err
+	}
+	return storage.RevokeToken(ctx, token, userID, clientID)
+}
+
+// SigningKey implements the op.Storage interface
+// it will be called when creating the OpenID Provider
+func (s *multiStorage) SigningKey(ctx context.Context) (op.SigningKey, error) {
+	storage, err := s.storageFromContext(ctx)
+	if err != nil {
+		return nil, err
+	}
+	return storage.SigningKey(ctx)
+}
+
+// SignatureAlgorithms implements the op.Storage interface
+// it will be called to get the sign
+func (s *multiStorage) SignatureAlgorithms(ctx context.Context) ([]jose.SignatureAlgorithm, error) {
+	storage, err := s.storageFromContext(ctx)
+	if err != nil {
+		return nil, err
+	}
+	return storage.SignatureAlgorithms(ctx)
+}
+
+// KeySet implements the op.Storage interface
+// it will be called to get the current (public) keys, among others for the keys_endpoint or for validating access_tokens on the userinfo_endpoint, ...
+func (s *multiStorage) KeySet(ctx context.Context) ([]op.Key, error) {
+	storage, err := s.storageFromContext(ctx)
+	if err != nil {
+		return nil, err
+	}
+	return storage.KeySet(ctx)
+}
+
+// GetClientByClientID implements the op.Storage interface
+// it will be called whenever information (type, redirect_uris, ...) about the client behind the client_id is needed
+func (s *multiStorage) GetClientByClientID(ctx context.Context, clientID string) (op.Client, error) {
+	storage, err := s.storageFromContext(ctx)
+	if err != nil {
+		return nil, err
+	}
+	return storage.GetClientByClientID(ctx, clientID)
+}
+
+// AuthorizeClientIDSecret implements the op.Storage interface
+// it will be called for validating the client_id, client_secret on token or introspection requests
+func (s *multiStorage) AuthorizeClientIDSecret(ctx context.Context, clientID, clientSecret string) error {
+	storage, err := s.storageFromContext(ctx)
+	if err != nil {
+		return err
+	}
+	return storage.AuthorizeClientIDSecret(ctx, clientID, clientSecret)
+}
+
+// SetUserinfoFromScopes implements the op.Storage interface.
+// Provide an empty implementation and use SetUserinfoFromRequest instead.
+func (s *multiStorage) SetUserinfoFromScopes(ctx context.Context, userinfo *oidc.UserInfo, userID, clientID string, scopes []string) error {
+	storage, err := s.storageFromContext(ctx)
+	if err != nil {
+		return err
+	}
+	return storage.SetUserinfoFromScopes(ctx, userinfo, userID, clientID, scopes)
+}
+
+// SetUserinfoFromRequests implements the op.CanSetUserinfoFromRequest interface.  In the
+// next major release, it will be required for op.Storage.
+// It will be called for the creation of an id_token, so we'll just pass it to the private function without any further check
+func (s *multiStorage) SetUserinfoFromRequest(ctx context.Context, userinfo *oidc.UserInfo, token op.IDTokenRequest, scopes []string) error {
+	storage, err := s.storageFromContext(ctx)
+	if err != nil {
+		return err
+	}
+	return storage.SetUserinfoFromRequest(ctx, userinfo, token, scopes)
+}
+
+// SetUserinfoFromToken implements the op.Storage interface
+// it will be called for the userinfo endpoint, so we read the token and pass the information from that to the private function
+func (s *multiStorage) SetUserinfoFromToken(ctx context.Context, userinfo *oidc.UserInfo, tokenID, subject, origin string) error {
+	storage, err := s.storageFromContext(ctx)
+	if err != nil {
+		return err
+	}
+	return storage.SetUserinfoFromToken(ctx, userinfo, tokenID, subject, origin)
+}
+
+// SetIntrospectionFromToken implements the op.Storage interface
+// it will be called for the introspection endpoint, so we read the token and pass the information from that to the private function
+func (s *multiStorage) SetIntrospectionFromToken(ctx context.Context, introspection *oidc.IntrospectionResponse, tokenID, subject, clientID string) error {
+	storage, err := s.storageFromContext(ctx)
+	if err != nil {
+		return err
+	}
+	return storage.SetIntrospectionFromToken(ctx, introspection, tokenID, subject, clientID)
+}
+
+// GetPrivateClaimsFromScopes implements the op.Storage interface
+// it will be called for the creation of a JWT access token to assert claims for custom scopes
+func (s *multiStorage) GetPrivateClaimsFromScopes(ctx context.Context, userID, clientID string, scopes []string) (claims map[string]any, err error) {
+	storage, err := s.storageFromContext(ctx)
+	if err != nil {
+		return nil, err
+	}
+	return storage.GetPrivateClaimsFromScopes(ctx, userID, clientID, scopes)
+}
+
+// GetKeyByIDAndClientID implements the op.Storage interface
+// it will be called to validate the signatures of a JWT (JWT Profile Grant and Authentication)
+func (s *multiStorage) GetKeyByIDAndClientID(ctx context.Context, keyID, userID string) (*jose.JSONWebKey, error) {
+	storage, err := s.storageFromContext(ctx)
+	if err != nil {
+		return nil, err
+	}
+	return storage.GetKeyByIDAndClientID(ctx, keyID, userID)
+}
+
+// ValidateJWTProfileScopes implements the op.Storage interface
+// it will be called to validate the scopes of a JWT Profile Authorization Grant request
+func (s *multiStorage) ValidateJWTProfileScopes(ctx context.Context, userID string, scopes []string) ([]string, error) {
+	storage, err := s.storageFromContext(ctx)
+	if err != nil {
+		return nil, err
+	}
+	return storage.ValidateJWTProfileScopes(ctx, userID, scopes)
+}
+
+// Health implements the op.Storage interface
+func (s *multiStorage) Health(ctx context.Context) error {
+	return nil
+}
+
+func (s *multiStorage) storageFromContext(ctx context.Context) (*Storage, *oidc.Error) {
+	storage, ok := s.issuers[op.IssuerFromContext(ctx)]
+	if !ok {
+		return nil, oidc.ErrInvalidRequest().WithDescription("invalid issuer")
+	}
+	return storage, nil
+}

example/server/storage/token.go

@@ -0,0 +1,26 @@
+package storage
+
+import "time"
+
+type Token struct {
+	ID             string
+	ApplicationID  string
+	Subject        string
+	RefreshTokenID string
+	Audience       []string
+	Expiration     time.Time
+	Scopes         []string
+}
+
+type RefreshToken struct {
+	ID            string
+	Token         string
+	AuthTime      time.Time
+	AMR           []string
+	Audience      []string
+	UserID        string
+	ApplicationID string
+	Expiration    time.Time
+	Scopes        []string
+	AccessToken   string // Token.ID
+}

example/server/storage/user.go

@@ -0,0 +1,102 @@
+package storage
+
+import (
+	"crypto/rsa"
+	"encoding/json"
+	"os"
+	"strings"
+
+	"golang.org/x/text/language"
+)
+
+type User struct {
+	ID                string
+	Username          string
+	Password          string
+	FirstName         string
+	LastName          string
+	Email             string
+	EmailVerified     bool
+	Phone             string
+	PhoneVerified     bool
+	PreferredLanguage language.Tag
+	IsAdmin           bool
+}
+
+type Service struct {
+	keys map[string]*rsa.PublicKey
+}
+
+type UserStore interface {
+	GetUserByID(string) *User
+	GetUserByUsername(string) *User
+	ExampleClientID() string
+}
+
+type userStore struct {
+	users map[string]*User
+}
+
+func StoreFromFile(path string) (UserStore, error) {
+	users := map[string]*User{}
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return nil, err
+	}
+	if err := json.Unmarshal(data, &users); err != nil {
+		return nil, err
+	}
+	return userStore{users}, nil
+}
+
+func NewUserStore(issuer string) UserStore {
+	hostname := strings.Split(strings.Split(issuer, "://")[1], ":")[0]
+	return userStore{
+		users: map[string]*User{
+			"id1": {
+				ID:                "id1",
+				Username:          "test-user@" + hostname,
+				Password:          "verysecure",
+				FirstName:         "Test",
+				LastName:          "User",
+				Email:             "test-user@zitadel.ch",
+				EmailVerified:     true,
+				Phone:             "",
+				PhoneVerified:     false,
+				PreferredLanguage: language.German,
+				IsAdmin:           true,
+			},
+			"id2": {
+				ID:                "id2",
+				Username:          "test-user2",
+				Password:          "verysecure",
+				FirstName:         "Test",
+				LastName:          "User2",
+				Email:             "test-user2@zitadel.ch",
+				EmailVerified:     true,
+				Phone:             "",
+				PhoneVerified:     false,
+				PreferredLanguage: language.German,
+				IsAdmin:           false,
+			},
+		},
+	}
+}
+
+// ExampleClientID is only used in the example server
+func (u userStore) ExampleClientID() string {
+	return "service"
+}
+
+func (u userStore) GetUserByID(id string) *User {
+	return u.users[id]
+}
+
+func (u userStore) GetUserByUsername(username string) *User {
+	for _, user := range u.users {
+		if user.Username == username {
+			return user
+		}
+	}
+	return nil
+}

example/server/storage/user_test.go

@@ -0,0 +1,70 @@
+package storage
+
+import (
+	"os"
+	"path"
+	"reflect"
+	"testing"
+
+	"golang.org/x/text/language"
+)
+
+func TestStoreFromFile(t *testing.T) {
+	for _, tc := range []struct {
+		name       string
+		pathToFile string
+		content    string
+		want       UserStore
+		wantErr    bool
+	}{
+		{
+			name:       "normal user file",
+			pathToFile: "userfile.json",
+			content: `{
+				"id1": {
+					"ID":                "id1",
+					"EmailVerified":     true,
+					"PreferredLanguage": "DE"
+				}
+			}`,
+			want: userStore{map[string]*User{
+				"id1": {
+					ID:                "id1",
+					EmailVerified:     true,
+					PreferredLanguage: language.German,
+				},
+			}},
+		},
+		{
+			name:       "malformed file",
+			pathToFile: "whatever",
+			content:    "not a json just a text",
+			wantErr:    true,
+		},
+		{
+			name:       "not existing file",
+			pathToFile: "what/ever/file",
+			wantErr:    true,
+		},
+	} {
+		t.Run(tc.name, func(t *testing.T) {
+			actualPath := path.Join(t.TempDir(), tc.pathToFile)
+
+			if tc.content != "" && tc.pathToFile != "" {
+				if err := os.WriteFile(actualPath, []byte(tc.content), 0666); err != nil {
+					t.Fatalf("cannot create file with test content: %q", tc.content)
+				}
+			}
+			result, err := StoreFromFile(actualPath)
+			if err != nil && !tc.wantErr {
+				t.Errorf("StoreFromFile(%q) returned unexpected error %q", tc.pathToFile, err)
+			} else if err == nil && tc.wantErr {
+				t.Errorf("StoreFromFile(%q) did not return an expected error", tc.pathToFile)
+			}
+			if !tc.wantErr && !reflect.DeepEqual(tc.want, result.(userStore)) {
+				t.Errorf("expected StoreFromFile(%q) = %v, but got %v",
+					tc.pathToFile, tc.want, result)
+			}
+		})
+	}
+}

go.mod

@@ -1,23 +1,40 @@
-module github.com/caos/oidc
+module git.christmann.info/LARA/zitadel-oidc/v3
 
-go 1.15
+go 1.23.7
+
+toolchain go1.24.1
 
 require (
-	github.com/caos/logging v0.0.2
-	github.com/golang/mock v1.4.4
-	github.com/google/go-cmp v0.5.2 // indirect
+	github.com/bmatcuk/doublestar/v4 v4.8.1
+	github.com/go-chi/chi/v5 v5.2.1
+	github.com/go-jose/go-jose/v4 v4.0.5
+	github.com/golang/mock v1.6.0
 	github.com/google/go-github/v31 v31.0.0
-	github.com/google/uuid v1.1.2
-	github.com/gorilla/handlers v1.5.1
-	github.com/gorilla/mux v1.8.0
-	github.com/gorilla/schema v1.2.0
-	github.com/gorilla/securecookie v1.1.1
-	github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e // indirect
-	github.com/sirupsen/logrus v1.7.0
-	github.com/stretchr/testify v1.6.1
-	golang.org/x/net v0.0.0-20200904194848-62affa334b73
-	golang.org/x/oauth2 v0.0.0-20200902213428-5d25da1a8d43
-	golang.org/x/text v0.3.3
-	gopkg.in/check.v1 v1.0.0-20200902074654-038fdea0a05b // indirect
-	gopkg.in/square/go-jose.v2 v2.5.1
+	github.com/google/uuid v1.6.0
+	github.com/gorilla/securecookie v1.1.2
+	github.com/jeremija/gosubmit v0.2.8
+	github.com/muhlemmer/gu v0.3.1
+	github.com/muhlemmer/httpforwarded v0.1.0
+	github.com/rs/cors v1.11.1
+	github.com/sirupsen/logrus v1.9.3
+	github.com/stretchr/testify v1.10.0
+	github.com/zitadel/logging v0.6.2
+	github.com/zitadel/schema v1.3.1
+	go.opentelemetry.io/otel v1.29.0
+	golang.org/x/oauth2 v0.30.0
+	golang.org/x/text v0.26.0
+)
+
+require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/go-logr/logr v1.4.2 // indirect
+	github.com/go-logr/stdr v1.2.2 // indirect
+	github.com/google/go-querystring v1.1.0 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	go.opentelemetry.io/otel/metric v1.29.0 // indirect
+	go.opentelemetry.io/otel/trace v1.29.0 // indirect
+	golang.org/x/crypto v0.36.0 // indirect
+	golang.org/x/net v0.38.0 // indirect
+	golang.org/x/sys v0.31.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -1,430 +1,108 @@
-cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
-cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
-cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
-cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
-cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
-cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To=
-cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4=
-cloud.google.com/go v0.53.0/go.mod h1:fp/UouUEsRkN6ryDKNW/Upv/JBKnv6WDthjR6+vze6M=
-cloud.google.com/go v0.54.0/go.mod h1:1rq2OEkV3YMf6n/9ZvGWI3GWw0VoqH/1x2nd8Is/bPc=
-cloud.google.com/go v0.56.0/go.mod h1:jr7tqZxxKOVYizybht9+26Z/gUq7tiRzu+ACVAMbKVk=
-cloud.google.com/go v0.57.0/go.mod h1:oXiQ6Rzq3RAkkY7N6t3TcE6jE+CIBBbA36lwQ1JyzZs=
-cloud.google.com/go v0.62.0/go.mod h1:jmCYTdRCQuc1PHIIJ/maLInMho30T/Y0M4hTdTShOYc=
-cloud.google.com/go v0.65.0/go.mod h1:O5N8zS7uWy9vkA9vayVHs65eM1ubvY4h553ofrNHObY=
-cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
-cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE=
-cloud.google.com/go/bigquery v1.4.0/go.mod h1:S8dzgnTigyfTmLBfrtrhyYhwRxG72rYxvftPBK2Dvzc=
-cloud.google.com/go/bigquery v1.5.0/go.mod h1:snEHRnqQbz117VIFhE8bmtwIDY80NLUZUMb4Nv6dBIg=
-cloud.google.com/go/bigquery v1.7.0/go.mod h1://okPTzCYNXSlb24MZs83e2Do+h+VXtc4gLoIoXIAPc=
-cloud.google.com/go/bigquery v1.8.0/go.mod h1:J5hqkt3O0uAFnINi6JXValWIb1v0goeZM77hZzJN/fQ=
-cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
-cloud.google.com/go/datastore v1.1.0/go.mod h1:umbIZjpQpHh4hmRpGhH4tLFup+FVzqBi1b3c64qFpCk=
-cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
-cloud.google.com/go/pubsub v1.1.0/go.mod h1:EwwdRX2sKPjnvnqCa270oGRyludottCI76h+R3AArQw=
-cloud.google.com/go/pubsub v1.2.0/go.mod h1:jhfEVHT8odbXTkndysNHCcx0awwzvfOlguIAii9o8iA=
-cloud.google.com/go/pubsub v1.3.1/go.mod h1:i+ucay31+CNRpDW4Lu78I4xXG+O1r/MAHgjpRVR+TSU=
-cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
-cloud.google.com/go/storage v1.5.0/go.mod h1:tpKbwo567HUNpVclU5sGELwQWBDZ8gh0ZeosJ0Rtdos=
-cloud.google.com/go/storage v1.6.0/go.mod h1:N7U0C8pVQ/+NIKOBQyamJIeKQKkZ+mxpohlUTyfDhBk=
-cloud.google.com/go/storage v1.8.0/go.mod h1:Wv1Oy7z6Yz3DshWRJFhqM/UCfaWIRTdp0RXyy7KQOVs=
-cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9ullr3+Kg0=
-dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
-github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
-github.com/caos/logging v0.0.2 h1:ebg5C/HN0ludYR+WkvnFjwSExF4wvyiWPyWGcKMYsoo=
-github.com/caos/logging v0.0.2/go.mod h1:9LKiDE2ChuGv6CHYif/kiugrfEXu9AwDiFWSreX7Wp0=
-github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
-github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
-github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
-github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
-github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
-github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
+github.com/bmatcuk/doublestar/v4 v4.8.1 h1:54Bopc5c2cAvhLRAzqOGCYHYyhcDHsFF4wWIR5wKP38=
+github.com/bmatcuk/doublestar/v4 v4.8.1/go.mod h1:xBQ8jztBU6kakFMg+8WGxn0c6z1fTSPVIjEY1Wr7jzc=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
-github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
-github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1mIlRU8Am5FuJP05cCM98=
-github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
-github.com/felixge/httpsnoop v1.0.1 h1:lvB5Jl89CsZtGIWuTcDM1E/vkVs49/Ml7JJe07l8SPQ=
-github.com/felixge/httpsnoop v1.0.1/go.mod h1:m8KPJKqk1gH5J9DgRY2ASl2lWCfGKXixSwevea8zH2U=
-github.com/go-gl/glfw v0.0.0-20190409004039-e6da0acd62b1/go.mod h1:vR7hzQXu2zJy9AVAgeJqvqgH9Q5CA+iKCZ2gyEVpxRU=
-github.com/go-gl/glfw/v3.3/glfw v0.0.0-20191125211704-12ad95a8df72/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
-github.com/go-gl/glfw/v3.3/glfw v0.0.0-20200222043503-6f7a984d4dc4/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
-github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
-github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
-github.com/golang/groupcache v0.0.0-20191227052852-215e87163ea7/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
-github.com/golang/groupcache v0.0.0-20200121045136-8c9f03a8e57e/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
-github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
-github.com/golang/mock v1.2.0/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
-github.com/golang/mock v1.3.1/go.mod h1:sBzyDLLjw3U8JLTeZvSv8jJB+tU5PVekmnlKIyFUx0Y=
-github.com/golang/mock v1.4.0/go.mod h1:UOMv5ysSaYNkG+OFQykRIcU/QvvxJf3p21QfJ2Bt3cw=
-github.com/golang/mock v1.4.1/go.mod h1:UOMv5ysSaYNkG+OFQykRIcU/QvvxJf3p21QfJ2Bt3cw=
-github.com/golang/mock v1.4.3/go.mod h1:UOMv5ysSaYNkG+OFQykRIcU/QvvxJf3p21QfJ2Bt3cw=
-github.com/golang/mock v1.4.4 h1:l75CXGRSwbaYNpl/Z2X1XIIAMSCquvXgpVZDhwEIJsc=
-github.com/golang/mock v1.4.4/go.mod h1:l3mdAwkq5BuhzHwde/uurv3sEJeZMXNpwsxVWU71h+4=
-github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
-github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
-github.com/golang/protobuf v1.3.2 h1:6nsPYzhq5kReh6QImI3k5qWzO4PEbvbIW2cwSfR/6xs=
+github.com/go-chi/chi/v5 v5.2.1 h1:KOIHODQj58PmL80G2Eak4WdvUzjSJSm0vG72crDCqb8=
+github.com/go-chi/chi/v5 v5.2.1/go.mod h1:L2yAIGWB3H+phAw1NxKwWM+7eUH/lU8pOMm5hHcoops=
+github.com/go-jose/go-jose/v4 v4.0.5 h1:M6T8+mKZl/+fNNuFHvGIzDz7BTLQPIounk/b9dw3AaE=
+github.com/go-jose/go-jose/v4 v4.0.5/go.mod h1:s3P1lRrkT8igV8D9OjyL4WRyHvjB6a4JSllnOrmmBOA=
+github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
+github.com/go-logr/logr v1.4.2 h1:6pFjapn8bFcIbiKo3XT4j/BhANplGihG6tvd+8rYgrY=
+github.com/go-logr/logr v1.4.2/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
+github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
+github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
+github.com/golang/mock v1.6.0 h1:ErTB+efbowRARo13NNdxyJji2egdxLGQhRaY+DUumQc=
+github.com/golang/mock v1.6.0/go.mod h1:p6yTPP+5HYm5mzsMV8JkE6ZKdX+/wYM6Hr+LicevLPs=
 github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
-github.com/golang/protobuf v1.3.3/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaWz5lYuqw=
-github.com/golang/protobuf v1.3.4/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaWz5lYuqw=
-github.com/golang/protobuf v1.3.5/go.mod h1:6O5/vntMXwX2lRkT1hjjk0nAC1IDOTvTlVgjlRvqsdk=
-github.com/golang/protobuf v1.4.0-rc.1/go.mod h1:ceaxUfeHdC40wWswd/P6IGgMaK3YpKi5j83Wpe3EHw8=
-github.com/golang/protobuf v1.4.0-rc.1.0.20200221234624-67d41d38c208/go.mod h1:xKAWHe0F5eneWXFV3EuXVDTCmh+JuBKY0li0aMyXATA=
-github.com/golang/protobuf v1.4.0-rc.2/go.mod h1:LlEzMj4AhA7rCAGe4KMBDvJI+AwstrUpVNzEA03Pprs=
-github.com/golang/protobuf v1.4.0-rc.4.0.20200313231945-b860323f09d0/go.mod h1:WU3c8KckQ9AFe+yFwt9sWVRKCVIyN9cPHBJSNnbL67w=
-github.com/golang/protobuf v1.4.0/go.mod h1:jodUvKwWbYaEsadDk5Fwe5c77LiNKVO9IDvqG2KuDX0=
-github.com/golang/protobuf v1.4.1/go.mod h1:U8fpvMrcmy5pZrNK1lt4xCsGvpyWQ/VVv6QDs8UjoX8=
-github.com/golang/protobuf v1.4.2 h1:+Z5KGCizgyZCbGh1KZqA0fcLLkwbsjIzS4aV2v7wJX0=
-github.com/golang/protobuf v1.4.2/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
-github.com/google/btree v0.0.0-20180813153112-4030bb1f1f0c/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
-github.com/google/btree v1.0.0/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
-github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
-github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
-github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
-github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
-github.com/google/go-cmp v0.4.1/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
-github.com/google/go-cmp v0.5.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
-github.com/google/go-cmp v0.5.1/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
-github.com/google/go-cmp v0.5.2 h1:X2ev0eStA3AbceY54o37/0PQ/UWqKEiiO2dKL5OPaFM=
 github.com/google/go-cmp v0.5.2/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/google/go-github/v31 v31.0.0 h1:JJUxlP9lFK+ziXKimTCprajMApV1ecWD4NB6CCb0plo=
 github.com/google/go-github/v31 v31.0.0/go.mod h1:NQPZol8/1sMoWYGN2yaALIBytu17gAWfhbweiEed3pM=
-github.com/google/go-querystring v1.0.0 h1:Xkwi/a1rcvNg1PPYe5vI8GbeBY/jrVuDX5ASuANWTrk=
 github.com/google/go-querystring v1.0.0/go.mod h1:odCYkC5MyYFN7vkCjXpyrEuKhc/BUO6wN/zVPAxq5ck=
-github.com/google/martian v2.1.0+incompatible/go.mod h1:9I4somxYTbIHy5NJKHRl3wXiIaQGbYVAs8BPL6v8lEs=
-github.com/google/martian/v3 v3.0.0/go.mod h1:y5Zk1BBys9G+gd6Jrk0W3cC1+ELVxBWuIGO+w/tUAp0=
-github.com/google/pprof v0.0.0-20181206194817-3ea8567a2e57/go.mod h1:zfwlbNMJ+OItoe0UupaVj+oy1omPYYDuagoSzA8v9mc=
-github.com/google/pprof v0.0.0-20190515194954-54271f7e092f/go.mod h1:zfwlbNMJ+OItoe0UupaVj+oy1omPYYDuagoSzA8v9mc=
-github.com/google/pprof v0.0.0-20191218002539-d4f498aebedc/go.mod h1:ZgVRPoUq/hfqzAqh7sHMqb3I9Rq5C59dIz2SbBwJ4eM=
-github.com/google/pprof v0.0.0-20200212024743-f11f1df84d12/go.mod h1:ZgVRPoUq/hfqzAqh7sHMqb3I9Rq5C59dIz2SbBwJ4eM=
-github.com/google/pprof v0.0.0-20200229191704-1ebb73c60ed3/go.mod h1:ZgVRPoUq/hfqzAqh7sHMqb3I9Rq5C59dIz2SbBwJ4eM=
-github.com/google/pprof v0.0.0-20200430221834-fc25d7d30c6d/go.mod h1:ZgVRPoUq/hfqzAqh7sHMqb3I9Rq5C59dIz2SbBwJ4eM=
-github.com/google/pprof v0.0.0-20200708004538-1a94d8640e99/go.mod h1:ZgVRPoUq/hfqzAqh7sHMqb3I9Rq5C59dIz2SbBwJ4eM=
-github.com/google/renameio v0.1.0/go.mod h1:KWCgfxg9yswjAJkECMjeO8J8rahYeXnNhOm40UhjYkI=
-github.com/google/uuid v1.1.2 h1:EVhdT+1Kseyi1/pUmXKaFxYsDNy9RQYkMWRH68J/W7Y=
-github.com/google/uuid v1.1.2/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
-github.com/googleapis/gax-go/v2 v2.0.4/go.mod h1:0Wqv26UfaUD9n4G6kQubkQ+KchISgw+vpHVxEJEs9eg=
-github.com/googleapis/gax-go/v2 v2.0.5/go.mod h1:DWXyrwAJ9X0FpwwEdw+IPEYBICEFu5mhpdKc/us6bOk=
-github.com/gorilla/handlers v1.5.1 h1:9lRY6j8DEeeBT10CvO9hGW0gmky0BprnvDI5vfhUHH4=
-github.com/gorilla/handlers v1.5.1/go.mod h1:t8XrUpc4KVXb7HGyJ4/cEnwQiaxrX/hz1Zv/4g96P1Q=
-github.com/gorilla/mux v1.8.0 h1:i40aqfkR1h2SlN9hojwV5ZA91wcXFOvkdNIeFDP5koI=
-github.com/gorilla/mux v1.8.0/go.mod h1:DVbg23sWSpFRCP0SfiEN6jmj59UnW/n46BH5rLB71So=
-github.com/gorilla/schema v1.2.0 h1:YufUaxZYCKGFuAq3c96BOhjgd5nmXiOY9NGzF247Tsc=
-github.com/gorilla/schema v1.2.0/go.mod h1:kgLaKoK1FELgZqMAVxx/5cbj0kT+57qxUrAlIO2eleU=
-github.com/gorilla/securecookie v1.1.1 h1:miw7JPhV+b/lAHSXz4qd/nN9jRiAFV5FwjeKyCS8BvQ=
-github.com/gorilla/securecookie v1.1.1/go.mod h1:ra0sb63/xPlUeL+yeDciTfxMRAA+MP+HVt/4epWDjd4=
-github.com/hashicorp/golang-lru v0.5.0/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
-github.com/hashicorp/golang-lru v0.5.1/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
-github.com/ianlancetaylor/demangle v0.0.0-20181102032728-5e5cf60278f6/go.mod h1:aSSvb/t6k1mPoxDqO4vJh6VOCGPwU4O0C2/Eqndh1Sc=
-github.com/jstemmer/go-junit-report v0.0.0-20190106144839-af01ea7f8024/go.mod h1:6v2b51hI/fHJwM22ozAgKL4VKDeJcHhJFhtBdhmNjmU=
-github.com/jstemmer/go-junit-report v0.9.1/go.mod h1:Brl9GWCQeLvo8nXZwPNNblvFj/XSXhF0NWZEnDohbsk=
-github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
-github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
-github.com/konsorten/go-windows-terminal-sequences v1.0.2 h1:DB17ag19krx9CFsz4o3enTrPXyIXCl+2iCXH/aMAp9s=
-github.com/konsorten/go-windows-terminal-sequences v1.0.2/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
-github.com/konsorten/go-windows-terminal-sequences v1.0.3 h1:CE8S1cTafDpPvMhIxNJKvHsGVBgn1xWYf1NbHQhywc8=
-github.com/konsorten/go-windows-terminal-sequences v1.0.3/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
-github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
-github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
-github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
+github.com/google/go-querystring v1.1.0 h1:AnCroh3fv4ZBgVIf1Iwtovgjaw/GiKJo8M8yD/fhyJ8=
+github.com/google/go-querystring v1.1.0/go.mod h1:Kcdr2DB4koayq7X8pmAG4sNG59So17icRSOU623lUBU=
+github.com/google/gofuzz v1.2.0 h1:xRy4A+RhZaiKjJ1bPfwQ8sedCA+YS2YcCHW6ec7JMi0=
+github.com/google/gofuzz v1.2.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
+github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
+github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/gorilla/securecookie v1.1.2 h1:YCIWL56dvtr73r6715mJs5ZvhtnY73hBvEF8kXD8ePA=
+github.com/gorilla/securecookie v1.1.2/go.mod h1:NfCASbcHqRSY+3a8tlWJwsQap2VX5pwzwo4h3eOamfo=
+github.com/jeremija/gosubmit v0.2.8 h1:mmSITBz9JxVtu8eqbN+zmmwX7Ij2RidQxhcwRVI4wqA=
+github.com/jeremija/gosubmit v0.2.8/go.mod h1:Ui+HS073lCFREXBbdfrJzMB57OI/bdxTiLtrDHHhFPI=
+github.com/kr/pretty v0.2.1 h1:Fmg33tUaq4/8ym9TJN1x7sLJnHVwhP33CNkpYV/7rwI=
+github.com/kr/pretty v0.2.1/go.mod h1:ipq/a2n7PKx3OHsz4KJII5eveXtPO4qwEXGdVfWzfnI=
 github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
-github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e h1:fD57ERR4JtEqsWbfPhv4DMiApHyliiK5xCTNVSPiaAs=
-github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e/go.mod h1:zD1mROLANZcx1PVRCS0qkT7pwLkGfwJo4zjcN/Tysno=
+github.com/muhlemmer/gu v0.3.1 h1:7EAqmFrW7n3hETvuAdmFmn4hS8W+z3LgKtrnow+YzNM=
+github.com/muhlemmer/gu v0.3.1/go.mod h1:YHtHR+gxM+bKEIIs7Hmi9sPT3ZDUvTN/i88wQpZkrdM=
+github.com/muhlemmer/httpforwarded v0.1.0 h1:x4DLrzXdliq8mprgUMR0olDvHGkou5BJsK/vWUetyzY=
+github.com/muhlemmer/httpforwarded v0.1.0/go.mod h1:yo9czKedo2pdZhoXe+yDkGVbU0TJ0q9oQ90BVoDEtw0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
-github.com/rogpeppe/go-internal v1.3.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFRclV5y23lUDJ4=
-github.com/sirupsen/logrus v1.4.2 h1:SPIRibHv4MatM3XXNO2BJeFLZwZ2LvZgfQ5+UNI2im4=
-github.com/sirupsen/logrus v1.4.2/go.mod h1:tLMulIdttU9McNUspp0xgXVQah82FyeX6MwdIuYE2rE=
-github.com/sirupsen/logrus v1.6.0 h1:UBcNElsrwanuuMsnGSlYmtmgbb23qDR5dG+6X6Oo89I=
-github.com/sirupsen/logrus v1.6.0/go.mod h1:7uNnSEd1DgxDLC74fIahvMZmmYsHGZGEOFrfsX/uA88=
-github.com/sirupsen/logrus v1.7.0 h1:ShrD1U9pZB12TX0cVy0DtePoCH97K8EtX+mg7ZARUtM=
-github.com/sirupsen/logrus v1.7.0/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0=
+github.com/rs/cors v1.11.1 h1:eU3gRzXLRK57F5rKMGMZURNdIG4EoAmX8k94r9wXWHA=
+github.com/rs/cors v1.11.1/go.mod h1:XyqrcTp5zjWr1wsJ8PIRZssZ8b/WMcMf71DJnit4EMU=
+github.com/sirupsen/logrus v1.9.3 h1:dueUQJ1C2q9oE3F7wvmSGAaVtTmUizReu6fjN8uqzbQ=
+github.com/sirupsen/logrus v1.9.3/go.mod h1:naHLuLoDiP4jHNo9R0sCBMtWGeIprob74mVsIT4qYEQ=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
-github.com/stretchr/objx v0.1.1 h1:2vfRuCMp5sSVIDSqO8oNnWJq7mPa6KVP3iPIwFBuy8A=
-github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
-github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
-github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
-github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0=
-github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
-github.com/yuin/goldmark v1.1.25/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
-github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
-github.com/yuin/goldmark v1.1.32/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
-go.opencensus.io v0.21.0/go.mod h1:mSImk1erAIZhrmZN+AvHh14ztQfjbGwt4TtuofqLduU=
-go.opencensus.io v0.22.0/go.mod h1:+kGneAE2xo2IficOXnaByMWTGM9T73dGwxeWcUqIpI8=
-go.opencensus.io v0.22.2/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
-go.opencensus.io v0.22.3/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
-go.opencensus.io v0.22.4/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
-golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2 h1:VklqNMn3ovrHsnt90PveolxSbWFaJdECFbxSq0Mqo2M=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=
+github.com/stretchr/testify v1.10.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+github.com/yuin/goldmark v1.3.5/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
+github.com/zitadel/logging v0.6.2 h1:MW2kDDR0ieQynPZ0KIZPrh9ote2WkxfBif5QoARDQcU=
+github.com/zitadel/logging v0.6.2/go.mod h1:z6VWLWUkJpnNVDSLzrPSQSQyttysKZ6bCRongw0ROK4=
+github.com/zitadel/schema v1.3.1 h1:QT3kwiRIRXXLVAs6gCK/u044WmUVh6IlbLXUsn6yRQU=
+github.com/zitadel/schema v1.3.1/go.mod h1:071u7D2LQacy1HAN+YnMd/mx1qVE2isb0Mjeqg46xnU=
+go.opentelemetry.io/otel v1.29.0 h1:PdomN/Al4q/lN6iBJEN3AwPvUiHPMlt93c8bqTG5Llw=
+go.opentelemetry.io/otel v1.29.0/go.mod h1:N/WtXPs1CNCUEx+Agz5uouwCba+i+bJGFicT8SR4NP8=
+go.opentelemetry.io/otel/metric v1.29.0 h1:vPf/HFWTNkPu1aYeIsc98l4ktOQaL6LeSoeV2g+8YLc=
+go.opentelemetry.io/otel/metric v1.29.0/go.mod h1:auu/QWieFVWx+DmQOUMgj0F8LHWdgalxXqvp7BII/W8=
+go.opentelemetry.io/otel/trace v1.29.0 h1:J/8ZNK4XgR7a21DZUAsbF8pZ5Jcw1VhACmnYt39JTi4=
+go.opentelemetry.io/otel/trace v1.29.0/go.mod h1:eHl3w0sp3paPkYstJOmAimxhiFXPg+MMTlEh3nsQgWQ=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
-golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
-golang.org/x/crypto v0.0.0-20190605123033-f99c8df09eb5/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
-golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9 h1:psW17arqaxU48Z5kZ0CQnkZWQJsqcURM6tKiBApRjXI=
-golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
-golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
-golang.org/x/exp v0.0.0-20190306152737-a1d7652674e8/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
-golang.org/x/exp v0.0.0-20190510132918-efd6b22b2522/go.mod h1:ZjyILWgesfNpC6sMxTJOJm9Kp84zZh5NQWvqDGG3Qr8=
-golang.org/x/exp v0.0.0-20190829153037-c13cbed26979/go.mod h1:86+5VVa7VpoJ4kLfm080zCjGlMRFzhUhsZKEZO7MGek=
-golang.org/x/exp v0.0.0-20191030013958-a1ab85dbe136/go.mod h1:JXzH8nQsPlswgeRAPE3MuO9GYsAcnJvJ4vnMwN/5qkY=
-golang.org/x/exp v0.0.0-20191129062945-2f5052295587/go.mod h1:2RIsYlXP63K8oxa1u096TMicItID8zy7Y6sNkU49FU4=
-golang.org/x/exp v0.0.0-20191227195350-da58074b4299/go.mod h1:2RIsYlXP63K8oxa1u096TMicItID8zy7Y6sNkU49FU4=
-golang.org/x/exp v0.0.0-20200119233911-0405dc783f0a/go.mod h1:2RIsYlXP63K8oxa1u096TMicItID8zy7Y6sNkU49FU4=
-golang.org/x/exp v0.0.0-20200207192155-f17229e696bd/go.mod h1:J/WKrq2StrnmMY6+EHIKF9dgMWnmCNThgcyBT1FY9mM=
-golang.org/x/exp v0.0.0-20200224162631-6cc2880d07d6/go.mod h1:3jZMyOhIsHpP37uCMkUooju7aAi5cS1Q23tOzKc+0MU=
-golang.org/x/image v0.0.0-20190227222117-0694c2d4d067/go.mod h1:kZ7UVZpmo3dzQBMxlp+ypCbDeSB+sBbTgSJuh5dn5js=
-golang.org/x/image v0.0.0-20190802002840-cff245a6509b/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0=
-golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
-golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU=
-golang.org/x/lint v0.0.0-20190301231843-5614ed5bae6f/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
-golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
-golang.org/x/lint v0.0.0-20190409202823-959b441ac422/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
-golang.org/x/lint v0.0.0-20190909230951-414d861bb4ac/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
-golang.org/x/lint v0.0.0-20190930215403-16217165b5de/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
-golang.org/x/lint v0.0.0-20191125180803-fdd1cda4f05f/go.mod h1:5qLYkcX4OjUUV8bRuDixDT3tpyyb+LUpUlRWLxfhWrs=
-golang.org/x/lint v0.0.0-20200130185559-910be7a94367/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
-golang.org/x/lint v0.0.0-20200302205851-738671d3881b/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
-golang.org/x/mobile v0.0.0-20190312151609-d3739f865fa6/go.mod h1:z+o9i4GpDbdi3rU15maQ/Ox0txvL9dWGYEHz965HBQE=
-golang.org/x/mobile v0.0.0-20190719004257-d2bd2a29d028/go.mod h1:E/iHnbuqvinMTCcRqshq8CkpyQDoeVncDDYHnLhea+o=
-golang.org/x/mod v0.0.0-20190513183733-4bf6d317e70e/go.mod h1:mXi4GBBbnImb6dmsKGUJ2LatrhH/nqhxcFungHvyanc=
-golang.org/x/mod v0.1.0/go.mod h1:0QHyrYULN0/3qlju5TqG8bIK38QM8yzMo5ekMj3DlcY=
-golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
-golang.org/x/mod v0.1.1-0.20191107180719-034126e5016b/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
-golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
-golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
-golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
-golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
-golang.org/x/net v0.0.0-20190108225652-1e06a53dbb7e/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
-golang.org/x/net v0.0.0-20190213061140-3a22650c66bd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
-golang.org/x/net v0.0.0-20190311183353-d8887717615a h1:oWX7TPOiFAMXLq8o0ikBYfCJVlRHBcsciT5bXOrH628=
+golang.org/x/crypto v0.36.0 h1:AnAEvhDddvBdpY+uR+MyHmuZzzNqXSe/GvuDeob5L34=
+golang.org/x/crypto v0.36.0/go.mod h1:Y4J0ReaxCR1IMaabaSMugxJES1EpwhBHhv2bDHklZvc=
+golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
-golang.org/x/net v0.0.0-20190501004415-9ce7a6920f09/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
-golang.org/x/net v0.0.0-20190503192946-f4e77d36d62c/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
-golang.org/x/net v0.0.0-20190603091049-60506f45cf65/go.mod h1:HSz+uSET+XFnRR8LxR5pz3Of3rY3CfYBVs4xY44aLks=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.0.0-20190628185345-da137c7871d7/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.0.0-20190724013045-ca1201d0de80/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.0.0-20191209160850-c0dbc17a3553/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.0.0-20200114155413-6afb5195e5aa/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20200202094626-16171245cfb2/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.0.0-20200222125558-5a598a2470a0/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.0.0-20200226121028-0de0cce0169b/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.0.0-20200301022130-244492dfa37a/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.0.0-20200324143707-d3edc9973b7e/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
-golang.org/x/net v0.0.0-20200501053045-e0ff5e5a1de5/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
-golang.org/x/net v0.0.0-20200506145744-7e3656a0809f/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
-golang.org/x/net v0.0.0-20200513185701-a91f0712d120/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
-golang.org/x/net v0.0.0-20200520182314-0ba52f642ac2/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
-golang.org/x/net v0.0.0-20200625001655-4c5254603344/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
-golang.org/x/net v0.0.0-20200707034311-ab3426394381/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
-golang.org/x/net v0.0.0-20200822124328-c89045814202 h1:VvcQYSHwXgi7W+TpUR6A9g6Up98WAHf3f/ulnJ62IyA=
-golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
-golang.org/x/net v0.0.0-20200904194848-62affa334b73 h1:MXfv8rhZWmFeqX3GNZRsd6vOLoaCHjYEX3qkRo3YBUA=
-golang.org/x/net v0.0.0-20200904194848-62affa334b73/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
+golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
+golang.org/x/net v0.38.0 h1:vRMAPTMaeGqVhG5QyLJHqNDwecKTomGeqbnfZyKlBI8=
+golang.org/x/net v0.38.0/go.mod h1:ivrbrMbzFq5J41QOQh0siUuly180yBYtLp+CKbEaFx8=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
-golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
-golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
-golang.org/x/oauth2 v0.0.0-20191202225959-858c2ad4c8b6/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
-golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
-golang.org/x/oauth2 v0.0.0-20200902213428-5d25da1a8d43 h1:ld7aEMNHoBnnDAX15v1T6z31v8HwR2A9FYOuAhWqkwc=
-golang.org/x/oauth2 v0.0.0-20200902213428-5d25da1a8d43/go.mod h1:KelEdhl1UZF7XfJ4dDtk6s++YSgaE7mD/BuKKDLBl4A=
-golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20190227155943-e225da77a7e6/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/oauth2 v0.30.0 h1:dnDm7JmhM45NNpd8FDDeLhK6FwqbOf4MLCM9zb1BOHI=
+golang.org/x/oauth2 v0.30.0/go.mod h1:B++QgG3ZKulg6sRPGD/mqlHQs5rB3Ml9erfeDY7xKlU=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20190312061237-fead79001313/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20190502145724-3ef323f4f1fd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20190507160741-ecd444e8653b/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20190606165138-5da285871e9c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20190624142023-c5567b49c5d0/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20190726091711-fc99dfbffb4e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20191001151750-bb3f8db39f24/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20191204072324-ce4227a45e2e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20191206220618-eeba5f6aabab h1:FvshnhkKW+LO3HWHodML8kuVX8rnJTxKm9dFPuI68UM=
-golang.org/x/sys v0.0.0-20191206220618-eeba5f6aabab/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20191228213918-04cbcbbfeed8/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200113162924-86b910548bc1/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200122134326-e047566fdf82/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200202164722-d101bd2416d5/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200212091648-12a6c2dcc1e4/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200302150141-5c8b2ff67527/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd h1:xhmwyvizuTgC2qz7ZlMluP20uW+C3Rm0FD/WLDX8884=
-golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200331124033-c3d80250170d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200501052902-10377860bb8e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200511232937-7e40ca221e25/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200515095857-1151b9dac4a9/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200523222454-059865788121/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200803210538-64077c9b5642 h1:B6caxRw+hozq68X2MY7jEpZh/cr4/aHLv9xU8Kkadrw=
-golang.org/x/sys v0.0.0-20200803210538-64077c9b5642/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.31.0 h1:ioabZlmFYtWhL+TRYpcnNlLwhyxaM9kWTDEmfnprqik=
+golang.org/x/sys v0.31.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
+golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
-golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
-golang.org/x/text v0.3.2 h1:tW2bmiBqwgJj/UpqtC8EpXEZVYOwU0yG4iWbprSVAcs=
-golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
-golang.org/x/text v0.3.3 h1:cokOdA+Jmi5PJGXLlLllQSgYigAEfHXJAERHVMaCc2k=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/time v0.0.0-20181108054448-85acf8d2951c/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
-golang.org/x/time v0.0.0-20190308202827-9d24e82272b4/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
-golang.org/x/time v0.0.0-20191024005414-555d28b269f0/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
+golang.org/x/text v0.26.0 h1:P42AVeLghgTYr4+xUnTRKDMqpar+PtX7KWuNQL21L8M=
+golang.org/x/text v0.26.0/go.mod h1:QK15LZJUUQVJxhz7wXgxSy/CJaTFjd0G+YLonydOVQA=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
-golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
-golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY=
-golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
-golang.org/x/tools v0.0.0-20190312151545-0bb0c0a6e846/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
-golang.org/x/tools v0.0.0-20190312170243-e65039ee4138/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
-golang.org/x/tools v0.0.0-20190425150028-36563e24a262/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
-golang.org/x/tools v0.0.0-20190506145303-2d16b83fe98c/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
-golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
-golang.org/x/tools v0.0.0-20190606124116-d0a3d012864b/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc=
-golang.org/x/tools v0.0.0-20190621195816-6e04913cbbac/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc=
-golang.org/x/tools v0.0.0-20190628153133-6cdbf07be9d0/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc=
-golang.org/x/tools v0.0.0-20190816200558-6889da9d5479/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
-golang.org/x/tools v0.0.0-20190911174233-4f2ddba30aff/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
-golang.org/x/tools v0.0.0-20191012152004-8de300cfc20a/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
-golang.org/x/tools v0.0.0-20191113191852-77e3bb0ad9e7/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
-golang.org/x/tools v0.0.0-20191115202509-3a792d9c32b2/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
-golang.org/x/tools v0.0.0-20191125144606-a911d9008d1f/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
-golang.org/x/tools v0.0.0-20191130070609-6e064ea0cf2d/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
-golang.org/x/tools v0.0.0-20191216173652-a0e659d51361/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
-golang.org/x/tools v0.0.0-20191227053925-7b8e75db28f4/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
-golang.org/x/tools v0.0.0-20200117161641-43d50277825c/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
-golang.org/x/tools v0.0.0-20200122220014-bf1340f18c4a/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
-golang.org/x/tools v0.0.0-20200130002326-2f3ba24bd6e7/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
-golang.org/x/tools v0.0.0-20200204074204-1cc6d1ef6c74/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
-golang.org/x/tools v0.0.0-20200207183749-b753a1ba74fa/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
-golang.org/x/tools v0.0.0-20200212150539-ea181f53ac56/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
-golang.org/x/tools v0.0.0-20200224181240-023911ca70b2/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
-golang.org/x/tools v0.0.0-20200227222343-706bc42d1f0d/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
-golang.org/x/tools v0.0.0-20200304193943-95d2e580d8eb/go.mod h1:o4KQGtdN14AW+yjsvvwRTJJuXz8XRtIHtEnmAXLyFUw=
-golang.org/x/tools v0.0.0-20200312045724-11d5b4c81c7d/go.mod h1:o4KQGtdN14AW+yjsvvwRTJJuXz8XRtIHtEnmAXLyFUw=
-golang.org/x/tools v0.0.0-20200331025713-a30bf2db82d4/go.mod h1:Sl4aGygMT6LrqrWclx+PTx3U+LnKx/seiNR+3G19Ar8=
-golang.org/x/tools v0.0.0-20200501065659-ab2804fb9c9d/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
-golang.org/x/tools v0.0.0-20200512131952-2bc93b1c0c88/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
-golang.org/x/tools v0.0.0-20200515010526-7d3b6ebf133d/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
-golang.org/x/tools v0.0.0-20200618134242-20370b0cb4b2/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
-golang.org/x/tools v0.0.0-20200729194436-6467de6f59a7/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
-golang.org/x/tools v0.0.0-20200804011535-6c149bb5ef0d/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
-golang.org/x/tools v0.0.0-20200825202427-b303f430e36d/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
+golang.org/x/tools v0.1.1/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-google.golang.org/api v0.4.0/go.mod h1:8k5glujaEP+g9n7WNsDg8QP6cUVNI86fCNMcbazEtwE=
-google.golang.org/api v0.7.0/go.mod h1:WtwebWUNSVBH/HAw79HIFXZNqEvBhG+Ra+ax0hx3E3M=
-google.golang.org/api v0.8.0/go.mod h1:o4eAsZoiT+ibD93RtjEohWalFOjRDx6CVaqeizhEnKg=
-google.golang.org/api v0.9.0/go.mod h1:o4eAsZoiT+ibD93RtjEohWalFOjRDx6CVaqeizhEnKg=
-google.golang.org/api v0.13.0/go.mod h1:iLdEw5Ide6rF15KTC1Kkl0iskquN2gFfn9o9XIsbkAI=
-google.golang.org/api v0.14.0/go.mod h1:iLdEw5Ide6rF15KTC1Kkl0iskquN2gFfn9o9XIsbkAI=
-google.golang.org/api v0.15.0/go.mod h1:iLdEw5Ide6rF15KTC1Kkl0iskquN2gFfn9o9XIsbkAI=
-google.golang.org/api v0.17.0/go.mod h1:BwFmGc8tA3vsd7r/7kR8DY7iEEGSU04BFxCo5jP/sfE=
-google.golang.org/api v0.18.0/go.mod h1:BwFmGc8tA3vsd7r/7kR8DY7iEEGSU04BFxCo5jP/sfE=
-google.golang.org/api v0.19.0/go.mod h1:BwFmGc8tA3vsd7r/7kR8DY7iEEGSU04BFxCo5jP/sfE=
-google.golang.org/api v0.20.0/go.mod h1:BwFmGc8tA3vsd7r/7kR8DY7iEEGSU04BFxCo5jP/sfE=
-google.golang.org/api v0.22.0/go.mod h1:BwFmGc8tA3vsd7r/7kR8DY7iEEGSU04BFxCo5jP/sfE=
-google.golang.org/api v0.24.0/go.mod h1:lIXQywCXRcnZPGlsd8NbLnOjtAoL6em04bJ9+z0MncE=
-google.golang.org/api v0.28.0/go.mod h1:lIXQywCXRcnZPGlsd8NbLnOjtAoL6em04bJ9+z0MncE=
-google.golang.org/api v0.29.0/go.mod h1:Lcubydp8VUV7KeIHD9z2Bys/sm/vGKnG1UHuDBSrHWM=
-google.golang.org/api v0.30.0/go.mod h1:QGmEvQ87FHZNiUVJkT14jQNYJ4ZJjdRF23ZXz5138Fc=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
-google.golang.org/appengine v1.4.0 h1:/wp5JvzpHIxhs/dumFmF7BXTf3Z+dd4uXta4kVyO508=
-google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
-google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
-google.golang.org/appengine v1.6.1/go.mod h1:i06prIuMbXzDqacNJfV5OdTW448YApPu5ww/cMBSeb0=
-google.golang.org/appengine v1.6.5 h1:tycE03LOZYQNhDpS27tcQdAzLCVMaj7QT2SXxebnpCM=
-google.golang.org/appengine v1.6.5/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc=
-google.golang.org/appengine v1.6.6 h1:lMO5rYAqUxkmaj76jAkRUvt5JZgFymx/+Q5Mzfivuhc=
-google.golang.org/appengine v1.6.6/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc=
-google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
-google.golang.org/genproto v0.0.0-20190307195333-5fe7a883aa19/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
-google.golang.org/genproto v0.0.0-20190418145605-e7d98fc518a7/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
-google.golang.org/genproto v0.0.0-20190425155659-357c62f0e4bb/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
-google.golang.org/genproto v0.0.0-20190502173448-54afdca5d873/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
-google.golang.org/genproto v0.0.0-20190801165951-fa694d86fc64/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
-google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
-google.golang.org/genproto v0.0.0-20190911173649-1774047e7e51/go.mod h1:IbNlFCBrqXvoKpeg0TB2l7cyZUmoaFKYIwrEpbDKLA8=
-google.golang.org/genproto v0.0.0-20191108220845-16a3f7862a1a/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
-google.golang.org/genproto v0.0.0-20191115194625-c23dd37a84c9/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
-google.golang.org/genproto v0.0.0-20191216164720-4f79533eabd1/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
-google.golang.org/genproto v0.0.0-20191230161307-f3c370f40bfb/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
-google.golang.org/genproto v0.0.0-20200115191322-ca5a22157cba/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
-google.golang.org/genproto v0.0.0-20200122232147-0452cf42e150/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
-google.golang.org/genproto v0.0.0-20200204135345-fa8e72b47b90/go.mod h1:GmwEX6Z4W5gMy59cAlVYjN9JhxgbQH6Gn+gFDQe2lzA=
-google.golang.org/genproto v0.0.0-20200212174721-66ed5ce911ce/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
-google.golang.org/genproto v0.0.0-20200224152610-e50cd9704f63/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
-google.golang.org/genproto v0.0.0-20200228133532-8c2c7df3a383/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
-google.golang.org/genproto v0.0.0-20200305110556-506484158171/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
-google.golang.org/genproto v0.0.0-20200312145019-da6875a35672/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
-google.golang.org/genproto v0.0.0-20200331122359-1ee6d9798940/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
-google.golang.org/genproto v0.0.0-20200430143042-b979b6f78d84/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
-google.golang.org/genproto v0.0.0-20200511104702-f5ebc3bea380/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
-google.golang.org/genproto v0.0.0-20200515170657-fc4c6c6a6587/go.mod h1:YsZOwe1myG/8QRHRsmBRE1LrgQY60beZKjly0O1fX9U=
-google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo=
-google.golang.org/genproto v0.0.0-20200618031413-b414f8b61790/go.mod h1:jDfRM7FcilCzHH/e9qn6dsT145K34l5v+OpcnNgKAAA=
-google.golang.org/genproto v0.0.0-20200729003335-053ba62fc06f/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
-google.golang.org/genproto v0.0.0-20200804131852-c06518451d9c/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
-google.golang.org/genproto v0.0.0-20200825200019-8632dd797987/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
-google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
-google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
-google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
-google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
-google.golang.org/grpc v1.25.1/go.mod h1:c3i+UQWmh7LiEpx4sFZnkU36qjEYZ0imhYfXVyQciAY=
-google.golang.org/grpc v1.26.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
-google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
-google.golang.org/grpc v1.27.1/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
-google.golang.org/grpc v1.28.0/go.mod h1:rpkK4SK4GF4Ach/+MFLZUBavHOvF2JJB5uozKKal+60=
-google.golang.org/grpc v1.29.1/go.mod h1:itym6AZVZYACWQqET3MqgPpjcuV5QH3BxFS3IjizoKk=
-google.golang.org/grpc v1.30.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
-google.golang.org/grpc v1.31.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
-google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
-google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
-google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
-google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miEFZTKqfCUM6K7xSMQL9OKL/b6hQv+e19PK+JZNE=
-google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
-google.golang.org/protobuf v1.22.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
-google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
-google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
-google.golang.org/protobuf v1.24.0/go.mod h1:r/3tXBNzIEhYS9I1OUVjXDlt8tc493IdKGjtUeSXeh4=
-google.golang.org/protobuf v1.25.0 h1:Ejskq+SyPohKW+1uil0JJMtmHCgJPJ/qWTxr8qp+R4c=
-google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/check.v1 v1.0.0-20200902074654-038fdea0a05b h1:QRR6H1YWRnHb4Y/HeNFCTJLFVxaq6wH4YuVdsUOr75U=
-gopkg.in/check.v1 v1.0.0-20200902074654-038fdea0a05b/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
-gopkg.in/square/go-jose.v2 v2.5.1 h1:7odma5RETjNHWJnR32wx8t+Io4djHE1PqxCFx3iiZ2w=
-gopkg.in/square/go-jose.v2 v2.5.1/go.mod h1:M9dMgbHiYLoDGQrXy7OpJDJWiKiU//h+vD76mk0e1AI=
-gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.2.7 h1:VUgggvou5XRW9mHwD/yXxIYSMtY0zoKQf/v226p2nyo=
-gopkg.in/yaml.v2 v2.2.7/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
+gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
+gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
-honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
-honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
-honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
-honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
-honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
-honnef.co/go/tools v0.0.1-2020.1.4/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
-rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
-rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
-rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

internal/testutil/gen/gen.go

@@ -0,0 +1,58 @@
+// Package gen allows generating of example tokens and claims.
+//
+//	go run ./internal/testutil/gen
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+
+	tu "git.christmann.info/LARA/zitadel-oidc/v3/internal/testutil"
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/oidc"
+)
+
+var custom = map[string]any{
+	"foo": "Hello, World!",
+	"bar": struct {
+		Count int      `json:"count,omitempty"`
+		Tags  []string `json:"tags,omitempty"`
+	}{
+		Count: 22,
+		Tags:  []string{"some", "tags"},
+	},
+}
+
+func main() {
+	enc := json.NewEncoder(os.Stdout)
+	enc.SetIndent("", "    ")
+
+	accessToken, atClaims := tu.NewAccessTokenCustom(
+		tu.ValidIssuer, tu.ValidSubject, tu.ValidAudience,
+		tu.ValidExpiration.AddDate(99, 0, 0), tu.ValidJWTID,
+		tu.ValidClientID, tu.ValidSkew, custom,
+	)
+	atHash, err := oidc.ClaimHash(accessToken, tu.SignatureAlgorithm)
+	if err != nil {
+		panic(err)
+	}
+
+	idToken, idClaims := tu.NewIDTokenCustom(
+		tu.ValidIssuer, tu.ValidSubject, tu.ValidAudience,
+		tu.ValidExpiration.AddDate(99, 0, 0), tu.ValidAuthTime,
+		tu.ValidNonce, tu.ValidACR, tu.ValidAMR, tu.ValidClientID,
+		tu.ValidSkew, atHash, custom,
+	)
+
+	fmt.Println("access token claims:")
+	if err := enc.Encode(atClaims); err != nil {
+		panic(err)
+	}
+	fmt.Printf("access token:\n%s\n", accessToken)
+
+	fmt.Println("ID token claims:")
+	if err := enc.Encode(idClaims); err != nil {
+		panic(err)
+	}
+	fmt.Printf("ID token:\n%s\n", idToken)
+}

internal/testutil/token.go

@@ -0,0 +1,180 @@
+// Package testuril helps setting up required data for testing,
+// such as tokens, claims and verifiers.
+package testutil
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"time"
+
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/oidc"
+	jose "github.com/go-jose/go-jose/v4"
+	"github.com/muhlemmer/gu"
+)
+
+// KeySet implements oidc.Keys
+type KeySet struct{}
+
+// VerifySignature implments op.KeySet.
+func (KeySet) VerifySignature(ctx context.Context, jws *jose.JSONWebSignature) (payload []byte, err error) {
+	if err = ctx.Err(); err != nil {
+		return nil, err
+	}
+
+	return jws.Verify(WebKey.Public())
+}
+
+// use a reproducible signing key
+const webkeyJSON = `{"kty":"RSA","kid":"1","alg":"PS512","n":"x6JoG8t2Li68JSwPwnh51TvHYFf3z72tQ3wmJG3VosU6MdJF0gSTCIwflOJ38OWE6hYtN1WAeyBy2CYdnXd1QZzkK_apGK4M7hsNA9jCTg8NOZjLPL0ww1jp7313Skla7mbm90uNdg4TUNp2n_r-sCYywI-9cfSlhzLSksxKK_BRdzy6xW20daAcI-mErQXIcvdYIguunJk_uTb8kJedsWMcQ4Mb57QujUok2Z2YabWyb9Fi1_StixXJvd_WEu93SHNMORB0u6ymnO3aZJdATLdhtcP-qsVicQhffpqVazmZQPf7K-7n4I5vJE4g9XXzZ2dSKSp3Ewe_nna_2kvbCw","e":"AQAB","d":"sl3F_QeF2O-CxQegMRYpbL6Tfd47GM6VDxXOkn_cACmNvFPudB4ILPvdf830cjTv06Lq1WS8fcZZNgygK0A_cNc3-pvRK67e-KMMtuIlgU7rdwmwlN1Iw1Ee-w6z1ZjC-PzR4iQMCW28DmKS2I-OnV4TvH7xOe7nMmvTPrvujV__YKfUxvAWXJG7_wtaJBGplezn5nNsKG2Ot9h0mhMdYUgGC36wLxo3Q5d4m79EXQYdhm89EfxogwvMmHRes5PNpHRuDZRHGAI4RZi2KvgmqF07e1Qdq4TqbQnY5pCYrdjqvEFFjGC6jTE-ak_b21FcSVy-9aZHyf04U4g5-cIUEQ","p":"7AaicFryJCHRekdSkx8tfPxaSiyEuN8jhP9cLqs4rLkIbrSHmanPhjnLe-Tlh3icQ8hPoy6WC8ktLwsrzbfGIh4U_zgAfvtD1Y_lZM-YSWZsxqlrGiI5do11iVzzoy4a1XdkgOjHQz9y6J-uoA9jY8ILG7VaEZQnaYwWZV3cspk","q":"2Ide9hlwthXJQJYqI0mibM5BiGBxJ4CafPmF1DYNXggBCczZ6ERGReNTGM_AEhy5mvLXUH6uBSOJlfHTYzx49C1GgIO3hEWVEGAKAytVRL6RfAkVSOXMQUp-HjXKpGg_Nx1SJxQf3rulbW8HXO4KqIlloyIXpPQSK7jB8A4hJUM","dp":"1nmc6F4sRNsaQHRJO_mL21RxM4_KtzfFThjCCoJ6iLHHUNnpkp_1PTKNjrLMRFM8JHgErfMqU-FmlqYfEtvZRq1xRQ39nWX0GT-eIwJljuVtGQVglqnc77bRxJXbqz-9EJdik6VzVM92Op7IDxiMp1zvvSkJhInNWqL6wvgNEZk","dq":"dlHizlAwiw90ndpwxD-khhhfLwqkSpW31br0KnYu78cn6hcKrCVC0UXbTp-XsU4JDmbMyauvpBc7Q7iVbpDI94UWFXvkeF8diYkxb3HqclpAXasI-oC4EKWILTHvvc9JW_Clx7zzfV7Ekvws5dcd8-LAq1gh232TwFiBgY_3BMk","qi":"E1k_9W3odXgcmIP2PCJztE7hB7jeuAL1ElAY88VJBBPY670uwOEjKL2VfQuz9q9IjzLAvcgf7vS9blw2RHP_XqHqSOlJWGwvMQTF0Q8zLknCgKt8q7HQQNWIJcBZ8qdUVn02-qf4E3tgZ3JHaHNs8imA_L-__WoUmzC4z5jH_lM"}`
+
+const SignatureAlgorithm = jose.RS256
+
+var (
+	WebKey jose.JSONWebKey
+	Signer jose.Signer
+)
+
+func init() {
+	err := json.Unmarshal([]byte(webkeyJSON), &WebKey)
+	if err != nil {
+		panic(err)
+	}
+	Signer, err = jose.NewSigner(jose.SigningKey{Algorithm: SignatureAlgorithm, Key: WebKey}, nil)
+	if err != nil {
+		panic(err)
+	}
+}
+
+type JWTProfileKeyStorage struct{}
+
+func (JWTProfileKeyStorage) GetKeyByIDAndClientID(ctx context.Context, keyID string, clientID string) (*jose.JSONWebKey, error) {
+	if err := ctx.Err(); err != nil {
+		return nil, err
+	}
+
+	return gu.Ptr(WebKey.Public()), nil
+}
+
+func signEncodeTokenClaims(claims any) string {
+	payload, err := json.Marshal(claims)
+	if err != nil {
+		panic(err)
+	}
+	object, err := Signer.Sign(payload)
+	if err != nil {
+		panic(err)
+	}
+	token, err := object.CompactSerialize()
+	if err != nil {
+		panic(err)
+	}
+	return token
+}
+
+func claimsMap(claims any) map[string]any {
+	data, err := json.Marshal(claims)
+	if err != nil {
+		panic(err)
+	}
+	dst := make(map[string]any)
+	if err = json.Unmarshal(data, &dst); err != nil {
+		panic(err)
+	}
+	return dst
+}
+
+func NewIDTokenCustom(issuer, subject string, audience []string, expiration, authTime time.Time, nonce string, acr string, amr []string, clientID string, skew time.Duration, atHash string, custom map[string]any) (string, *oidc.IDTokenClaims) {
+	claims := oidc.NewIDTokenClaims(issuer, subject, audience, expiration, authTime, nonce, acr, amr, clientID, skew)
+	claims.AccessTokenHash = atHash
+	claims.Claims = custom
+	token := signEncodeTokenClaims(claims)
+
+	// set this so that assertion in tests will work
+	claims.SignatureAlg = SignatureAlgorithm
+	claims.Claims = claimsMap(claims)
+	return token, claims
+}
+
+// NewIDToken creates a new IDTokenClaims with passed data and returns a signed token and claims.
+func NewIDToken(issuer, subject string, audience []string, expiration, authTime time.Time, nonce string, acr string, amr []string, clientID string, skew time.Duration, atHash string) (string, *oidc.IDTokenClaims) {
+	return NewIDTokenCustom(issuer, subject, audience, expiration, authTime, nonce, acr, amr, clientID, skew, atHash, nil)
+}
+
+func NewAccessTokenCustom(issuer, subject string, audience []string, expiration time.Time, jwtid, clientID string, skew time.Duration, custom map[string]any) (string, *oidc.AccessTokenClaims) {
+	claims := oidc.NewAccessTokenClaims(issuer, subject, audience, expiration, jwtid, clientID, skew)
+	claims.Claims = custom
+	token := signEncodeTokenClaims(claims)
+
+	// set this so that assertion in tests will work
+	claims.SignatureAlg = SignatureAlgorithm
+	claims.Claims = claimsMap(claims)
+	return token, claims
+}
+
+// NewAcccessToken creates a new AccessTokenClaims with passed data and returns a signed token and claims.
+func NewAccessToken(issuer, subject string, audience []string, expiration time.Time, jwtid, clientID string, skew time.Duration) (string, *oidc.AccessTokenClaims) {
+	return NewAccessTokenCustom(issuer, subject, audience, expiration, jwtid, clientID, skew, nil)
+}
+
+func NewJWTProfileAssertion(issuer, clientID string, audience []string, issuedAt, expiration time.Time) (string, *oidc.JWTTokenRequest) {
+	req := &oidc.JWTTokenRequest{
+		Issuer:    issuer,
+		Subject:   clientID,
+		Audience:  audience,
+		ExpiresAt: oidc.FromTime(expiration),
+		IssuedAt:  oidc.FromTime(issuedAt),
+	}
+	// make sure the private claim map is set correctly
+	data, err := json.Marshal(req)
+	if err != nil {
+		panic(err)
+	}
+	if err = json.Unmarshal(data, req); err != nil {
+		panic(err)
+	}
+	return signEncodeTokenClaims(req), req
+}
+
+const InvalidSignatureToken = `eyJhbGciOiJQUzUxMiJ9.eyJpc3MiOiJsb2NhbC5jb20iLCJzdWIiOiJ0aW1AbG9jYWwuY29tIiwiYXVkIjpbInVuaXQiLCJ0ZXN0IiwiNTU1NjY2Il0sImV4cCI6MTY3Nzg0MDQzMSwiaWF0IjoxNjc3ODQwMzcwLCJhdXRoX3RpbWUiOjE2Nzc4NDAzMTAsIm5vbmNlIjoiMTIzNDUiLCJhY3IiOiJzb21ldGhpbmciLCJhbXIiOlsiZm9vIiwiYmFyIl0sImF6cCI6IjU1NTY2NiJ9.DtZmvVkuE4Hw48ijBMhRJbxEWCr_WEYuPQBMY73J9TP6MmfeNFkjVJf4nh4omjB9gVLnQ-xhEkNOe62FS5P0BB2VOxPuHZUj34dNspCgG3h98fGxyiMb5vlIYAHDF9T-w_LntlYItohv63MmdYR-hPpAqjXE7KOfErf-wUDGE9R3bfiQ4HpTdyFJB1nsToYrZ9lhP2mzjTCTs58ckZfQ28DFHn_lfHWpR4rJBgvLx7IH4rMrUayr09Ap-PxQLbv0lYMtmgG1z3JK8MXnuYR0UJdZnEIezOzUTlThhCXB-nvuAXYjYxZZTR0FtlgZUHhIpYK0V2abf_Q_Or36akNCUg`
+
+// These variables always result in a valid token
+var (
+	ValidIssuer     = "local.com"
+	ValidSubject    = "tim@local.com"
+	ValidAudience   = []string{"unit", "test"}
+	ValidAuthTime   = time.Now().Add(-time.Minute)       // authtime is always 1 minute in the past
+	ValidExpiration = ValidAuthTime.Add(2 * time.Minute) // token is always 1 more minute available
+	ValidJWTID      = "9876"
+	ValidNonce      = "12345"
+	ValidACR        = "something"
+	ValidAMR        = []string{"foo", "bar"}
+	ValidClientID   = "555666"
+	ValidSkew       = time.Second
+)
+
+// ValidIDToken returns a token and claims that are in the token.
+// It uses the Valid* global variables and the token will always
+// pass verification.
+func ValidIDToken() (string, *oidc.IDTokenClaims) {
+	return NewIDToken(ValidIssuer, ValidSubject, ValidAudience, ValidExpiration, ValidAuthTime, ValidNonce, ValidACR, ValidAMR, ValidClientID, ValidSkew, "")
+}
+
+// ValidAccessToken returns a token and claims that are in the token.
+// It uses the Valid* global variables and the token always passes
+// verification within the same test run.
+func ValidAccessToken() (string, *oidc.AccessTokenClaims) {
+	return NewAccessToken(ValidIssuer, ValidSubject, ValidAudience, ValidExpiration, ValidJWTID, ValidClientID, ValidSkew)
+}
+
+func ValidJWTProfileAssertion() (string, *oidc.JWTTokenRequest) {
+	return NewJWTProfileAssertion(ValidClientID, ValidClientID, []string{ValidIssuer}, time.Now(), ValidExpiration)
+}
+
+// ACRVerify is a oidc.ACRVerifier func.
+func ACRVerify(acr string) error {
+	if acr != ValidACR {
+		return errors.New("invalid acr")
+	}
+	return nil
+}

pkg/client/client.go

@@ -0,0 +1,312 @@
+package client
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"strings"
+	"time"
+
+	"github.com/go-jose/go-jose/v4"
+	"github.com/zitadel/logging"
+	"go.opentelemetry.io/otel"
+	"golang.org/x/oauth2"
+
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/crypto"
+	httphelper "git.christmann.info/LARA/zitadel-oidc/v3/pkg/http"
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/oidc"
+)
+
+var (
+	Encoder = httphelper.Encoder(oidc.NewEncoder())
+	Tracer  = otel.Tracer("github.com/zitadel/oidc/pkg/client")
+)
+
+// Discover calls the discovery endpoint of the provided issuer and returns its configuration
+// It accepts an optional argument "wellknownUrl" which can be used to overide the dicovery endpoint url
+func Discover(ctx context.Context, issuer string, httpClient *http.Client, wellKnownUrl ...string) (*oidc.DiscoveryConfiguration, error) {
+	ctx, span := Tracer.Start(ctx, "Discover")
+	defer span.End()
+
+	wellKnown := strings.TrimSuffix(issuer, "/") + oidc.DiscoveryEndpoint
+	if len(wellKnownUrl) == 1 && wellKnownUrl[0] != "" {
+		wellKnown = wellKnownUrl[0]
+	}
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, wellKnown, nil)
+	if err != nil {
+		return nil, err
+	}
+	discoveryConfig := new(oidc.DiscoveryConfiguration)
+	err = httphelper.HttpRequest(httpClient, req, &discoveryConfig)
+	if err != nil {
+		return nil, errors.Join(oidc.ErrDiscoveryFailed, err)
+	}
+	if logger, ok := logging.FromContext(ctx); ok {
+		logger.Debug("discover", "config", discoveryConfig)
+	}
+
+	if discoveryConfig.Issuer != issuer {
+		return nil, oidc.ErrIssuerInvalid
+	}
+	return discoveryConfig, nil
+}
+
+type TokenEndpointCaller interface {
+	TokenEndpoint() string
+	HttpClient() *http.Client
+}
+
+func CallTokenEndpoint(ctx context.Context, request any, caller TokenEndpointCaller) (newToken *oauth2.Token, err error) {
+	return callTokenEndpoint(ctx, request, nil, caller)
+}
+
+func callTokenEndpoint(ctx context.Context, request any, authFn any, caller TokenEndpointCaller) (newToken *oauth2.Token, err error) {
+	ctx, span := Tracer.Start(ctx, "callTokenEndpoint")
+	defer span.End()
+
+	req, err := httphelper.FormRequest(ctx, caller.TokenEndpoint(), request, Encoder, authFn)
+	if err != nil {
+		return nil, err
+	}
+	tokenRes := new(oidc.AccessTokenResponse)
+	if err := httphelper.HttpRequest(caller.HttpClient(), req, &tokenRes); err != nil {
+		return nil, err
+	}
+	token := &oauth2.Token{
+		AccessToken:  tokenRes.AccessToken,
+		TokenType:    tokenRes.TokenType,
+		RefreshToken: tokenRes.RefreshToken,
+		Expiry:       time.Now().UTC().Add(time.Duration(tokenRes.ExpiresIn) * time.Second),
+	}
+	if tokenRes.IDToken != "" {
+		token = token.WithExtra(map[string]any{
+			"id_token": tokenRes.IDToken,
+		})
+	}
+	return token, nil
+}
+
+type EndSessionCaller interface {
+	GetEndSessionEndpoint() string
+	HttpClient() *http.Client
+}
+
+func CallEndSessionEndpoint(ctx context.Context, request any, authFn any, caller EndSessionCaller) (*url.URL, error) {
+	ctx, span := Tracer.Start(ctx, "CallEndSessionEndpoint")
+	defer span.End()
+
+	endpoint := caller.GetEndSessionEndpoint()
+	if endpoint == "" {
+		return nil, fmt.Errorf("end session %w", ErrEndpointNotSet)
+	}
+
+	req, err := httphelper.FormRequest(ctx, endpoint, request, Encoder, authFn)
+	if err != nil {
+		return nil, err
+	}
+	client := caller.HttpClient()
+	client.CheckRedirect = func(_ *http.Request, _ []*http.Request) error {
+		return http.ErrUseLastResponse
+	}
+	resp, err := client.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode < 200 || resp.StatusCode >= 400 {
+		body, err := io.ReadAll(resp.Body)
+		if err != nil {
+			return nil, err
+		}
+		return nil, fmt.Errorf("EndSession failure, %d status code: %s", resp.StatusCode, string(body))
+	}
+	location, err := resp.Location()
+	if err != nil {
+		if errors.Is(err, http.ErrNoLocation) {
+			return nil, nil
+		}
+		return nil, err
+	}
+	return location, nil
+}
+
+type RevokeCaller interface {
+	GetRevokeEndpoint() string
+	HttpClient() *http.Client
+}
+
+type RevokeRequest struct {
+	Token         string `schema:"token"`
+	TokenTypeHint string `schema:"token_type_hint"`
+	ClientID      string `schema:"client_id"`
+	ClientSecret  string `schema:"client_secret"`
+}
+
+func CallRevokeEndpoint(ctx context.Context, request any, authFn any, caller RevokeCaller) error {
+	ctx, span := Tracer.Start(ctx, "CallRevokeEndpoint")
+	defer span.End()
+
+	endpoint := caller.GetRevokeEndpoint()
+	if endpoint == "" {
+		return fmt.Errorf("revoke %w", ErrEndpointNotSet)
+	}
+
+	req, err := httphelper.FormRequest(ctx, endpoint, request, Encoder, authFn)
+	if err != nil {
+		return err
+	}
+	client := caller.HttpClient()
+	client.CheckRedirect = func(_ *http.Request, _ []*http.Request) error {
+		return http.ErrUseLastResponse
+	}
+	resp, err := client.Do(req)
+	if err != nil {
+		return err
+	}
+	defer resp.Body.Close()
+	// According to RFC7009 in section 2.2:
+	// "The content of the response body is ignored by the client as all
+	// necessary information is conveyed in the response code."
+	if resp.StatusCode != 200 {
+		body, err := io.ReadAll(resp.Body)
+		if err == nil {
+			return fmt.Errorf("revoke returned status %d and text: %s", resp.StatusCode, string(body))
+		} else {
+			return fmt.Errorf("revoke returned status %d", resp.StatusCode)
+		}
+	}
+	return nil
+}
+
+func CallTokenExchangeEndpoint(ctx context.Context, request any, authFn any, caller TokenEndpointCaller) (resp *oidc.TokenExchangeResponse, err error) {
+	ctx, span := Tracer.Start(ctx, "CallTokenExchangeEndpoint")
+	defer span.End()
+
+	req, err := httphelper.FormRequest(ctx, caller.TokenEndpoint(), request, Encoder, authFn)
+	if err != nil {
+		return nil, err
+	}
+	tokenRes := new(oidc.TokenExchangeResponse)
+	if err := httphelper.HttpRequest(caller.HttpClient(), req, &tokenRes); err != nil {
+		return nil, err
+	}
+	return tokenRes, nil
+}
+
+func NewSignerFromPrivateKeyByte(key []byte, keyID string) (jose.Signer, error) {
+	privateKey, algorithm, err := crypto.BytesToPrivateKey(key)
+	if err != nil {
+		return nil, err
+	}
+	signingKey := jose.SigningKey{
+		Algorithm: algorithm,
+		Key:       &jose.JSONWebKey{Key: privateKey, KeyID: keyID},
+	}
+	return jose.NewSigner(signingKey, &jose.SignerOptions{})
+}
+
+func SignedJWTProfileAssertion(clientID string, audience []string, expiration time.Duration, signer jose.Signer) (string, error) {
+	iat := time.Now()
+	exp := iat.Add(expiration)
+	return crypto.Sign(&oidc.JWTTokenRequest{
+		Issuer:    clientID,
+		Subject:   clientID,
+		Audience:  audience,
+		ExpiresAt: oidc.FromTime(exp),
+		IssuedAt:  oidc.FromTime(iat),
+	}, signer)
+}
+
+type DeviceAuthorizationCaller interface {
+	GetDeviceAuthorizationEndpoint() string
+	HttpClient() *http.Client
+}
+
+func CallDeviceAuthorizationEndpoint(ctx context.Context, request *oidc.ClientCredentialsRequest, caller DeviceAuthorizationCaller, authFn any) (*oidc.DeviceAuthorizationResponse, error) {
+	ctx, span := Tracer.Start(ctx, "CallDeviceAuthorizationEndpoint")
+	defer span.End()
+
+	endpoint := caller.GetDeviceAuthorizationEndpoint()
+	if endpoint == "" {
+		return nil, fmt.Errorf("device authorization %w", ErrEndpointNotSet)
+	}
+
+	req, err := httphelper.FormRequest(ctx, endpoint, request, Encoder, authFn)
+	if err != nil {
+		return nil, err
+	}
+	if request.ClientSecret != "" {
+		req.SetBasicAuth(request.ClientID, request.ClientSecret)
+	}
+
+	resp := new(oidc.DeviceAuthorizationResponse)
+	if err := httphelper.HttpRequest(caller.HttpClient(), req, &resp); err != nil {
+		return nil, err
+	}
+	return resp, nil
+}
+
+type DeviceAccessTokenRequest struct {
+	*oidc.ClientCredentialsRequest
+	oidc.DeviceAccessTokenRequest
+}
+
+func CallDeviceAccessTokenEndpoint(ctx context.Context, request *DeviceAccessTokenRequest, caller TokenEndpointCaller) (*oidc.AccessTokenResponse, error) {
+	ctx, span := Tracer.Start(ctx, "CallDeviceAccessTokenEndpoint")
+	defer span.End()
+
+	req, err := httphelper.FormRequest(ctx, caller.TokenEndpoint(), request, Encoder, nil)
+	if err != nil {
+		return nil, err
+	}
+	if request.ClientSecret != "" {
+		req.SetBasicAuth(request.ClientID, request.ClientSecret)
+	}
+
+	resp := new(oidc.AccessTokenResponse)
+	if err := httphelper.HttpRequest(caller.HttpClient(), req, &resp); err != nil {
+		return nil, err
+	}
+	return resp, nil
+}
+
+func PollDeviceAccessTokenEndpoint(ctx context.Context, interval time.Duration, request *DeviceAccessTokenRequest, caller TokenEndpointCaller) (*oidc.AccessTokenResponse, error) {
+	ctx, span := Tracer.Start(ctx, "PollDeviceAccessTokenEndpoint")
+	defer span.End()
+
+	for {
+		timer := time.After(interval)
+		select {
+		case <-ctx.Done():
+			return nil, ctx.Err()
+		case <-timer:
+		}
+
+		ctx, cancel := context.WithTimeout(ctx, interval)
+		defer cancel()
+
+		resp, err := CallDeviceAccessTokenEndpoint(ctx, request, caller)
+		if err == nil {
+			return resp, nil
+		}
+		if errors.Is(err, context.DeadlineExceeded) {
+			interval += 5 * time.Second
+		}
+		var target *oidc.Error
+		if !errors.As(err, &target) {
+			return nil, err
+		}
+		switch target.ErrorType {
+		case oidc.AuthorizationPending:
+			continue
+		case oidc.SlowDown:
+			interval += 5 * time.Second
+			continue
+		default:
+			return nil, err
+		}
+	}
+}

pkg/client/client_test.go

@@ -0,0 +1,59 @@
+package client
+
+import (
+	"context"
+	"net/http"
+	"testing"
+
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/oidc"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestDiscover(t *testing.T) {
+	type wantFields struct {
+		UILocalesSupported bool
+	}
+
+	type args struct {
+		issuer       string
+		wellKnownUrl []string
+	}
+	tests := []struct {
+		name       string
+		args       args
+		wantFields *wantFields
+		wantErr    error
+	}{
+		{
+			name: "spotify", // https://github.com/zitadel/oidc/issues/406
+			args: args{
+				issuer: "https://accounts.spotify.com",
+			},
+			wantFields: &wantFields{
+				UILocalesSupported: true,
+			},
+			wantErr: nil,
+		},
+		{
+			name: "discovery failed",
+			args: args{
+				issuer: "https://example.com",
+			},
+			wantErr: oidc.ErrDiscoveryFailed,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, err := Discover(context.Background(), tt.args.issuer, http.DefaultClient, tt.args.wellKnownUrl...)
+			require.ErrorIs(t, err, tt.wantErr)
+			if tt.wantFields == nil {
+				return
+			}
+			assert.Equal(t, tt.args.issuer, got.Issuer)
+			if tt.wantFields.UILocalesSupported {
+				assert.NotEmpty(t, got.UILocalesSupported)
+			}
+		})
+	}
+}

pkg/client/errors.go

@@ -0,0 +1,5 @@
+package client
+
+import "errors"
+
+var ErrEndpointNotSet = errors.New("endpoint not set")

pkg/client/integration_test.go

@@ -0,0 +1,594 @@
+package client_test
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+	"io"
+	"log/slog"
+	"math/rand"
+	"net/http"
+	"net/http/cookiejar"
+	"net/http/httptest"
+	"net/url"
+	"os"
+	"os/signal"
+	"strconv"
+	"syscall"
+	"testing"
+	"time"
+
+	"github.com/jeremija/gosubmit"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"golang.org/x/oauth2"
+
+	"git.christmann.info/LARA/zitadel-oidc/v3/example/server/exampleop"
+	"git.christmann.info/LARA/zitadel-oidc/v3/example/server/storage"
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/client/rp"
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/client/rs"
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/client/tokenexchange"
+	httphelper "git.christmann.info/LARA/zitadel-oidc/v3/pkg/http"
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/oidc"
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/op"
+)
+
+var Logger = slog.New(
+	slog.NewTextHandler(os.Stderr, &slog.HandlerOptions{
+		AddSource: true,
+		Level:     slog.LevelDebug,
+	}),
+)
+
+var CTX context.Context
+
+func TestMain(m *testing.M) {
+	os.Exit(func() int {
+		ctx, cancel := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGINT)
+		defer cancel()
+		CTX, cancel = context.WithTimeout(ctx, time.Minute)
+		defer cancel()
+		return m.Run()
+	}())
+}
+
+func TestRelyingPartySession(t *testing.T) {
+	for _, wrapServer := range []bool{false, true} {
+		t.Run(fmt.Sprint("wrapServer ", wrapServer), func(t *testing.T) {
+			testRelyingPartySession(t, wrapServer)
+		})
+	}
+}
+
+func testRelyingPartySession(t *testing.T, wrapServer bool) {
+	t.Log("------- start example OP ------")
+	targetURL := "http://local-site"
+	exampleStorage := storage.NewStorage(storage.NewUserStore(targetURL))
+	var dh deferredHandler
+	opServer := httptest.NewServer(&dh)
+	defer opServer.Close()
+	t.Logf("auth server at %s", opServer.URL)
+	dh.Handler = exampleop.SetupServer(opServer.URL, exampleStorage, Logger, wrapServer)
+
+	seed := rand.New(rand.NewSource(int64(os.Getpid()) + time.Now().UnixNano()))
+	clientID := t.Name() + "-" + strconv.FormatInt(seed.Int63(), 25)
+
+	t.Log("------- run authorization code flow ------")
+	provider, tokens := RunAuthorizationCodeFlow(t, opServer, clientID, "secret")
+
+	t.Log("------- refresh tokens  ------")
+
+	newTokens, err := rp.RefreshTokens[*oidc.IDTokenClaims](CTX, provider, tokens.RefreshToken, "", "")
+	require.NoError(t, err, "refresh token")
+	assert.NotNil(t, newTokens, "access token")
+	t.Logf("new access token %s", newTokens.AccessToken)
+	t.Logf("new refresh token %s", newTokens.RefreshToken)
+	t.Logf("new token type %s", newTokens.TokenType)
+	t.Logf("new expiry %s", newTokens.Expiry.Format(time.RFC3339))
+	require.NotEmpty(t, newTokens.AccessToken, "new accessToken")
+	assert.NotEmpty(t, newTokens.IDToken, "new idToken")
+	assert.NotNil(t, newTokens.IDTokenClaims)
+	assert.Equal(t, newTokens.IDTokenClaims.Subject, tokens.IDTokenClaims.Subject)
+
+	t.Log("------ end session (logout) ------")
+
+	newLoc, err := rp.EndSession(CTX, provider, tokens.IDToken, "", "")
+	require.NoError(t, err, "logout")
+	if newLoc != nil {
+		t.Logf("redirect to %s", newLoc)
+	} else {
+		t.Logf("no redirect")
+	}
+
+	t.Log("------ attempt refresh again (should fail) ------")
+	t.Log("trying original refresh token", tokens.RefreshToken)
+	_, err = rp.RefreshTokens[*oidc.IDTokenClaims](CTX, provider, tokens.RefreshToken, "", "")
+	assert.Errorf(t, err, "refresh with original")
+	if newTokens.RefreshToken != "" {
+		t.Log("trying replacement refresh token", newTokens.RefreshToken)
+		_, err = rp.RefreshTokens[*oidc.IDTokenClaims](CTX, provider, newTokens.RefreshToken, "", "")
+		assert.Errorf(t, err, "refresh with replacement")
+	}
+}
+
+func TestRelyingPartyWithSigningAlgsFromDiscovery(t *testing.T) {
+	targetURL := "http://local-site"
+	localURL, err := url.Parse(targetURL + "/login?requestID=1234")
+	require.NoError(t, err, "local url")
+
+	t.Log("------- start example OP ------")
+	seed := rand.New(rand.NewSource(int64(os.Getpid()) + time.Now().UnixNano()))
+	clientID := t.Name() + "-" + strconv.FormatInt(seed.Int63(), 25)
+	clientSecret := "secret"
+	client := storage.WebClient(clientID, clientSecret, targetURL)
+	storage.RegisterClients(client)
+	exampleStorage := storage.NewStorage(storage.NewUserStore(targetURL))
+	var dh deferredHandler
+	opServer := httptest.NewServer(&dh)
+	defer opServer.Close()
+	dh.Handler = exampleop.SetupServer(opServer.URL, exampleStorage, Logger, true)
+
+	t.Log("------- create RP ------")
+	provider, err := rp.NewRelyingPartyOIDC(
+		CTX,
+		opServer.URL,
+		clientID,
+		clientSecret,
+		targetURL,
+		[]string{"openid"},
+		rp.WithSigningAlgsFromDiscovery(),
+	)
+	require.NoError(t, err, "new rp")
+
+	t.Log("------- run authorization code flow ------")
+	jar, err := cookiejar.New(nil)
+	require.NoError(t, err, "create cookie jar")
+	httpClient := &http.Client{
+		Timeout: time.Second * 5,
+		CheckRedirect: func(_ *http.Request, _ []*http.Request) error {
+			return http.ErrUseLastResponse
+		},
+		Jar: jar,
+	}
+	state := "state-" + strconv.FormatInt(seed.Int63(), 25)
+	capturedW := httptest.NewRecorder()
+	get := httptest.NewRequest("GET", localURL.String(), nil)
+	rp.AuthURLHandler(func() string { return state }, provider,
+		rp.WithPromptURLParam("Hello, World!", "Goodbye, World!"),
+		rp.WithURLParam("custom", "param"),
+	)(capturedW, get)
+	defer func() {
+		if t.Failed() {
+			t.Log("response body (redirect from RP to OP)", capturedW.Body.String())
+		}
+	}()
+	resp := capturedW.Result()
+	startAuthURL, err := resp.Location()
+	require.NoError(t, err, "get redirect")
+	loginPageURL := getRedirect(t, "get redirect to login page", httpClient, startAuthURL)
+	form := getForm(t, "get login form", httpClient, loginPageURL)
+	defer func() {
+		if t.Failed() {
+			t.Logf("login form (unfilled): %s", string(form))
+		}
+	}()
+	postLoginRedirectURL := fillForm(t, "fill login form", httpClient, form, loginPageURL,
+		gosubmit.Set("username", "test-user@local-site"),
+		gosubmit.Set("password", "verysecure"),
+	)
+	codeBearingURL := getRedirect(t, "get redirect with code", httpClient, postLoginRedirectURL)
+	capturedW = httptest.NewRecorder()
+	get = httptest.NewRequest("GET", codeBearingURL.String(), nil)
+	var idToken string
+	redirect := func(w http.ResponseWriter, r *http.Request, newTokens *oidc.Tokens[*oidc.IDTokenClaims], state string, rp rp.RelyingParty, info *oidc.UserInfo) {
+		idToken = newTokens.IDToken
+		http.Redirect(w, r, targetURL, http.StatusFound)
+	}
+	rp.CodeExchangeHandler(rp.UserinfoCallback(redirect), provider)(capturedW, get)
+	defer func() {
+		if t.Failed() {
+			t.Log("token exchange response body", capturedW.Body.String())
+			require.GreaterOrEqual(t, capturedW.Code, 200, "captured response code")
+		}
+	}()
+
+	t.Log("------- verify id token ------")
+	_, err = rp.VerifyIDToken[*oidc.IDTokenClaims](CTX, idToken, provider.IDTokenVerifier())
+	require.NoError(t, err, "verify id token")
+}
+
+func TestResourceServerTokenExchange(t *testing.T) {
+	for _, wrapServer := range []bool{false, true} {
+		t.Run(fmt.Sprint("wrapServer ", wrapServer), func(t *testing.T) {
+			testResourceServerTokenExchange(t, wrapServer)
+		})
+	}
+}
+
+func testResourceServerTokenExchange(t *testing.T, wrapServer bool) {
+	t.Log("------- start example OP ------")
+	targetURL := "http://local-site"
+	exampleStorage := storage.NewStorage(storage.NewUserStore(targetURL))
+	var dh deferredHandler
+	opServer := httptest.NewServer(&dh)
+	defer opServer.Close()
+	t.Logf("auth server at %s", opServer.URL)
+	dh.Handler = exampleop.SetupServer(opServer.URL, exampleStorage, Logger, wrapServer)
+
+	seed := rand.New(rand.NewSource(int64(os.Getpid()) + time.Now().UnixNano()))
+	clientID := t.Name() + "-" + strconv.FormatInt(seed.Int63(), 25)
+	clientSecret := "secret"
+
+	t.Log("------- run authorization code flow ------")
+	provider, tokens := RunAuthorizationCodeFlow(t, opServer, clientID, clientSecret)
+
+	resourceServer, err := rs.NewResourceServerClientCredentials(CTX, opServer.URL, clientID, clientSecret)
+	require.NoError(t, err, "new resource server")
+
+	t.Log("------- exchage refresh tokens (impersonation)  ------")
+
+	tokenExchangeResponse, err := tokenexchange.ExchangeToken(
+		CTX,
+		resourceServer,
+		tokens.RefreshToken,
+		oidc.RefreshTokenType,
+		"",
+		"",
+		[]string{},
+		[]string{},
+		[]string{"profile", "custom_scope:impersonate:id2"},
+		oidc.RefreshTokenType,
+	)
+	require.NoError(t, err, "refresh token")
+	require.NotNil(t, tokenExchangeResponse, "token exchange response")
+	assert.Equal(t, tokenExchangeResponse.IssuedTokenType, oidc.RefreshTokenType)
+	assert.NotEmpty(t, tokenExchangeResponse.AccessToken, "access token")
+	assert.NotEmpty(t, tokenExchangeResponse.RefreshToken, "refresh token")
+	assert.Equal(t, []string(tokenExchangeResponse.Scopes), []string{"profile", "custom_scope:impersonate:id2"})
+
+	t.Log("------ end session (logout) ------")
+
+	newLoc, err := rp.EndSession(CTX, provider, tokens.IDToken, "", "")
+	require.NoError(t, err, "logout")
+	if newLoc != nil {
+		t.Logf("redirect to %s", newLoc)
+	} else {
+		t.Logf("no redirect")
+	}
+
+	t.Log("------- attempt exchage again (should fail)  ------")
+
+	tokenExchangeResponse, err = tokenexchange.ExchangeToken(
+		CTX,
+		resourceServer,
+		tokens.RefreshToken,
+		oidc.RefreshTokenType,
+		"",
+		"",
+		[]string{},
+		[]string{},
+		[]string{"profile", "custom_scope:impersonate:id2"},
+		oidc.RefreshTokenType,
+	)
+	require.Error(t, err, "refresh token")
+	assert.Contains(t, err.Error(), "subject_token is invalid")
+	require.Nil(t, tokenExchangeResponse, "token exchange response")
+}
+
+func RunAuthorizationCodeFlow(t *testing.T, opServer *httptest.Server, clientID, clientSecret string) (provider rp.RelyingParty, tokens *oidc.Tokens[*oidc.IDTokenClaims]) {
+	targetURL := "http://local-site"
+	localURL, err := url.Parse(targetURL + "/login?requestID=1234")
+	require.NoError(t, err, "local url")
+
+	client := storage.WebClient(clientID, clientSecret, targetURL)
+	storage.RegisterClients(client)
+
+	jar, err := cookiejar.New(nil)
+	require.NoError(t, err, "create cookie jar")
+	httpClient := &http.Client{
+		Timeout: time.Second * 5,
+		CheckRedirect: func(_ *http.Request, _ []*http.Request) error {
+			return http.ErrUseLastResponse
+		},
+		Jar: jar,
+	}
+
+	t.Log("------- create RP ------")
+	key := []byte("test1234test1234")
+	cookieHandler := httphelper.NewCookieHandler(key, key, httphelper.WithUnsecure())
+	provider, err = rp.NewRelyingPartyOIDC(
+		CTX,
+		opServer.URL,
+		clientID,
+		clientSecret,
+		targetURL,
+		[]string{"openid", "email", "profile", "offline_access"},
+		rp.WithPKCE(cookieHandler),
+		rp.WithAuthStyle(oauth2.AuthStyleInHeader),
+		rp.WithVerifierOpts(
+			rp.WithIssuedAtOffset(5*time.Second),
+			rp.WithSupportedSigningAlgorithms("RS256", "RS384", "RS512", "ES256", "ES384", "ES512"),
+		),
+	)
+	require.NoError(t, err, "new rp")
+
+	t.Log("------- get redirect from local client (rp) to OP ------")
+	seed := rand.New(rand.NewSource(int64(os.Getpid()) + time.Now().UnixNano()))
+	state := "state-" + strconv.FormatInt(seed.Int63(), 25)
+	capturedW := httptest.NewRecorder()
+	get := httptest.NewRequest("GET", localURL.String(), nil)
+	rp.AuthURLHandler(func() string { return state }, provider,
+		rp.WithPromptURLParam("Hello, World!", "Goodbye, World!"),
+		rp.WithURLParam("custom", "param"),
+	)(capturedW, get)
+
+	defer func() {
+		if t.Failed() {
+			t.Log("response body (redirect from RP to OP)", capturedW.Body.String())
+		}
+	}()
+	require.GreaterOrEqual(t, capturedW.Code, 200, "captured response code")
+	require.Less(t, capturedW.Code, 400, "captured response code")
+	require.Contains(t, capturedW.Body.String(), `prompt=Hello%2C+World%21+Goodbye%2C+World%21`)
+	require.Contains(t, capturedW.Body.String(), `custom=param`)
+
+	//nolint:bodyclose
+	resp := capturedW.Result()
+	jar.SetCookies(localURL, resp.Cookies())
+
+	startAuthURL, err := resp.Location()
+	require.NoError(t, err, "get redirect")
+	assert.NotEmpty(t, startAuthURL, "login url")
+	t.Log("Starting auth at", startAuthURL)
+
+	t.Log("------- get redirect to OP to login page ------")
+	loginPageURL := getRedirect(t, "get redirect to login page", httpClient, startAuthURL)
+	t.Log("login page URL", loginPageURL)
+
+	t.Log("------- get login form ------")
+	form := getForm(t, "get login form", httpClient, loginPageURL)
+	t.Log("login form (unfilled)", string(form))
+	defer func() {
+		if t.Failed() {
+			t.Logf("login form (unfilled): %s", string(form))
+		}
+	}()
+
+	t.Log("------- post to login form, get redirect to OP ------")
+	postLoginRedirectURL := fillForm(t, "fill login form", httpClient, form, loginPageURL,
+		gosubmit.Set("username", "test-user@local-site"),
+		gosubmit.Set("password", "verysecure"))
+	t.Logf("Get redirect from %s", postLoginRedirectURL)
+
+	t.Log("------- redirect from OP back to RP ------")
+	codeBearingURL := getRedirect(t, "get redirect with code", httpClient, postLoginRedirectURL)
+	t.Logf("Redirect with code %s", codeBearingURL)
+
+	t.Log("------- exchange code for tokens ------")
+	capturedW = httptest.NewRecorder()
+	get = httptest.NewRequest("GET", codeBearingURL.String(), nil)
+	for _, cookie := range jar.Cookies(codeBearingURL) {
+		get.Header["Cookie"] = append(get.Header["Cookie"], cookie.String())
+		t.Logf("setting cookie %s", cookie)
+	}
+
+	var email string
+	redirect := func(w http.ResponseWriter, r *http.Request, newTokens *oidc.Tokens[*oidc.IDTokenClaims], state string, rp rp.RelyingParty, info *oidc.UserInfo) {
+		tokens = newTokens
+		require.NotNil(t, tokens, "tokens")
+		require.NotNil(t, info, "info")
+		t.Log("access token", tokens.AccessToken)
+		t.Log("refresh token", tokens.RefreshToken)
+		t.Log("id token", tokens.IDToken)
+		t.Log("email", info.Email)
+
+		email = info.Email
+		http.Redirect(w, r, targetURL, 302)
+	}
+	rp.CodeExchangeHandler(rp.UserinfoCallback(redirect), provider, rp.WithURLParam("custom", "param"))(capturedW, get)
+
+	defer func() {
+		if t.Failed() {
+			t.Log("token exchange response body", capturedW.Body.String())
+			require.GreaterOrEqual(t, capturedW.Code, 200, "captured response code")
+		}
+	}()
+	require.Less(t, capturedW.Code, 400, "token exchange response code")
+	// TODO: how to check the custom header was sent to the server?
+
+	//nolint:bodyclose
+	resp = capturedW.Result()
+
+	authorizedURL, err := resp.Location()
+	require.NoError(t, err, "get fully-authorizied redirect location")
+	require.Equal(t, targetURL, authorizedURL.String(), "fully-authorizied redirect location")
+
+	require.NotEmpty(t, tokens.IDToken, "id token")
+	assert.NotEmpty(t, tokens.RefreshToken, "refresh token")
+	assert.NotEmpty(t, tokens.AccessToken, "access token")
+	assert.NotEmpty(t, email, "email")
+
+	return provider, tokens
+}
+
+func TestClientCredentials(t *testing.T) {
+	targetURL := "http://local-site"
+	exampleStorage := storage.NewStorage(storage.NewUserStore(targetURL))
+	var dh deferredHandler
+	opServer := httptest.NewServer(&dh)
+	defer opServer.Close()
+	t.Logf("auth server at %s", opServer.URL)
+	dh.Handler = exampleop.SetupServer(opServer.URL, exampleStorage, Logger, true)
+
+	provider, err := rp.NewRelyingPartyOIDC(
+		CTX,
+		opServer.URL,
+		"sid1",
+		"verysecret",
+		targetURL,
+		[]string{"openid"},
+	)
+	require.NoError(t, err, "new rp")
+
+	token, err := rp.ClientCredentials(CTX, provider, nil)
+	require.NoError(t, err, "ClientCredentials call")
+	require.NotNil(t, token)
+	assert.NotEmpty(t, token.AccessToken)
+}
+
+func TestErrorFromPromptNone(t *testing.T) {
+	jar, err := cookiejar.New(nil)
+	require.NoError(t, err, "create cookie jar")
+	httpClient := &http.Client{
+		Timeout: time.Second * 5,
+		CheckRedirect: func(_ *http.Request, _ []*http.Request) error {
+			return http.ErrUseLastResponse
+		},
+		Jar: jar,
+	}
+
+	t.Log("------- start example OP ------")
+	targetURL := "http://local-site"
+	exampleStorage := storage.NewStorage(storage.NewUserStore(targetURL))
+	var dh deferredHandler
+	opServer := httptest.NewServer(&dh)
+	defer opServer.Close()
+	t.Logf("auth server at %s", opServer.URL)
+	dh.Handler = exampleop.SetupServer(opServer.URL, exampleStorage, Logger, false, op.WithHttpInterceptors(
+		func(next http.Handler) http.Handler {
+			return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+				t.Logf("request to %s", r.URL)
+				next.ServeHTTP(w, r)
+			})
+		},
+	))
+	seed := rand.New(rand.NewSource(int64(os.Getpid()) + time.Now().UnixNano()))
+	clientID := t.Name() + "-" + strconv.FormatInt(seed.Int63(), 25)
+	clientSecret := "secret"
+	client := storage.WebClient(clientID, clientSecret, targetURL)
+	storage.RegisterClients(client)
+
+	t.Log("------- create RP ------")
+	key := []byte("test1234test1234")
+	cookieHandler := httphelper.NewCookieHandler(key, key, httphelper.WithUnsecure())
+	provider, err := rp.NewRelyingPartyOIDC(
+		CTX,
+		opServer.URL,
+		clientID,
+		clientSecret,
+		targetURL,
+		[]string{"openid", "email", "profile", "offline_access"},
+		rp.WithPKCE(cookieHandler),
+		rp.WithVerifierOpts(
+			rp.WithIssuedAtOffset(5*time.Second),
+			rp.WithSupportedSigningAlgorithms("RS256", "RS384", "RS512", "ES256", "ES384", "ES512"),
+		),
+	)
+	require.NoError(t, err, "new rp")
+
+	t.Log("------- start auth flow with prompt=none ------- ")
+	state := "state-32892"
+	capturedW := httptest.NewRecorder()
+	localURL, err := url.Parse(targetURL + "/login")
+	require.NoError(t, err)
+
+	get := httptest.NewRequest("GET", localURL.String(), nil)
+	rp.AuthURLHandler(func() string { return state }, provider,
+		rp.WithPromptURLParam("none"),
+		rp.WithResponseModeURLParam(oidc.ResponseModeFragment),
+	)(capturedW, get)
+
+	defer func() {
+		if t.Failed() {
+			t.Log("response body (redirect from RP to OP)", capturedW.Body.String())
+		}
+	}()
+	require.GreaterOrEqual(t, capturedW.Code, 200, "captured response code")
+	require.Less(t, capturedW.Code, 400, "captured response code")
+
+	//nolint:bodyclose
+	resp := capturedW.Result()
+	jar.SetCookies(localURL, resp.Cookies())
+
+	startAuthURL, err := resp.Location()
+	require.NoError(t, err, "get redirect")
+	assert.NotEmpty(t, startAuthURL, "login url")
+	t.Log("Starting auth at", startAuthURL)
+
+	t.Log("------- get redirect from OP ------")
+	loginPageURL := getRedirect(t, "get redirect to login page", httpClient, startAuthURL)
+	t.Log("login page URL", loginPageURL)
+
+	require.Contains(t, loginPageURL.String(), `error=login_required`, "prompt=none should error")
+	require.Contains(t, loginPageURL.String(), `local-site#error=`, "response_mode=fragment means '#' instead of '?'")
+}
+
+type deferredHandler struct {
+	http.Handler
+}
+
+func getRedirect(t *testing.T, desc string, httpClient *http.Client, uri *url.URL) *url.URL {
+	req := &http.Request{
+		Method: "GET",
+		URL:    uri,
+		Header: make(http.Header),
+	}
+	resp, err := httpClient.Do(req)
+	require.NoError(t, err, "GET "+uri.String())
+
+	defer func() {
+		if t.Failed() {
+			body, _ := io.ReadAll(resp.Body)
+			t.Logf("%s: GET %s: body: %s", desc, uri, string(body))
+		}
+	}()
+
+	//nolint:errcheck
+	defer resp.Body.Close()
+	redirect, err := resp.Location()
+	require.NoErrorf(t, err, "%s: get redirect %s", desc, uri)
+	require.NotEmptyf(t, redirect, "%s: get redirect %s", desc, uri)
+	return redirect
+}
+
+func getForm(t *testing.T, desc string, httpClient *http.Client, uri *url.URL) []byte {
+	req := &http.Request{
+		Method: "GET",
+		URL:    uri,
+		Header: make(http.Header),
+	}
+	resp, err := httpClient.Do(req)
+	require.NoErrorf(t, err, "%s: GET %s", desc, uri)
+	//nolint:errcheck
+	defer resp.Body.Close()
+	body, err := io.ReadAll(resp.Body)
+	require.NoError(t, err, "%s: read GET %s", desc, uri)
+	return body
+}
+
+func fillForm(t *testing.T, desc string, httpClient *http.Client, body []byte, uri *url.URL, opts ...gosubmit.Option) *url.URL {
+	// TODO: switch to io.NopCloser when go1.15 support is dropped
+	req := gosubmit.ParseWithURL(io.NopCloser(bytes.NewReader(body)), uri.String()).FirstForm().Testing(t).NewTestRequest(
+		append([]gosubmit.Option{gosubmit.AutoFill()}, opts...)...,
+	)
+	if req.URL.Scheme == "" {
+		req.URL = uri
+		t.Log("request lost it's proto..., adding back... request now", req.URL)
+	}
+	req.RequestURI = "" // bug in gosubmit?
+	resp, err := httpClient.Do(req)
+	require.NoErrorf(t, err, "%s: POST %s", desc, uri)
+
+	//nolint:errcheck
+	defer resp.Body.Close()
+	defer func() {
+		if t.Failed() {
+			body, _ := io.ReadAll(resp.Body)
+			t.Logf("%s: GET %s: body: %s", desc, uri, string(body))
+		}
+	}()
+
+	redirect, err := resp.Location()
+	require.NoErrorf(t, err, "%s: redirect for POST %s", desc, uri)
+	return redirect
+}

pkg/client/jwt_profile.go

@@ -0,0 +1,30 @@
+package client
+
+import (
+	"context"
+	"net/url"
+
+	"golang.org/x/oauth2"
+
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/http"
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/oidc"
+)
+
+// JWTProfileExchange handles the oauth2 jwt profile exchange
+func JWTProfileExchange(ctx context.Context, jwtProfileGrantRequest *oidc.JWTProfileGrantRequest, caller TokenEndpointCaller) (*oauth2.Token, error) {
+	return CallTokenEndpoint(ctx, jwtProfileGrantRequest, caller)
+}
+
+func ClientAssertionCodeOptions(assertion string) []oauth2.AuthCodeOption {
+	return []oauth2.AuthCodeOption{
+		oauth2.SetAuthURLParam("client_assertion", assertion),
+		oauth2.SetAuthURLParam("client_assertion_type", oidc.ClientAssertionTypeJWTAssertion),
+	}
+}
+
+func ClientAssertionFormAuthorization(assertion string) http.FormAuthorization {
+	return func(values url.Values) {
+		values.Set("client_assertion", assertion)
+		values.Set("client_assertion_type", oidc.ClientAssertionTypeJWTAssertion)
+	}
+}

pkg/client/key.go

@@ -0,0 +1,40 @@
+package client
+
+import (
+	"encoding/json"
+	"os"
+)
+
+const (
+	serviceAccountKey = "serviceaccount"
+	applicationKey    = "application"
+)
+
+type KeyFile struct {
+	Type   string `json:"type"` // serviceaccount or application
+	KeyID  string `json:"keyId"`
+	Key    string `json:"key"`
+	Issuer string `json:"issuer"` // not yet in file
+
+	// serviceaccount
+	UserID string `json:"userId"`
+
+	// application
+	ClientID string `json:"clientId"`
+}
+
+func ConfigFromKeyFile(path string) (*KeyFile, error) {
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return nil, err
+	}
+	return ConfigFromKeyFileData(data)
+}
+
+func ConfigFromKeyFileData(data []byte) (*KeyFile, error) {
+	var f KeyFile
+	if err := json.Unmarshal(data, &f); err != nil {
+		return nil, err
+	}
+	return &f, nil
+}

pkg/client/profile/jwt_profile.go

@@ -0,0 +1,118 @@
+package profile
+
+import (
+	"context"
+	"net/http"
+	"time"
+
+	jose "github.com/go-jose/go-jose/v4"
+	"golang.org/x/oauth2"
+
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/client"
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/oidc"
+)
+
+type TokenSource interface {
+	oauth2.TokenSource
+	TokenCtx(context.Context) (*oauth2.Token, error)
+}
+
+// jwtProfileTokenSource implement the oauth2.TokenSource
+// it will request a token using the OAuth2 JWT Profile Grant
+// therefore sending an `assertion` by signing a JWT with the provided private key
+type jwtProfileTokenSource struct {
+	clientID      string
+	audience      []string
+	signer        jose.Signer
+	scopes        []string
+	httpClient    *http.Client
+	tokenEndpoint string
+}
+
+// NewJWTProfileTokenSourceFromKeyFile returns an implementation of TokenSource
+// It will request a token using the OAuth2 JWT Profile Grant,
+// therefore sending an `assertion` by singing a JWT with the provided private key from jsonFile.
+//
+// The passed context is only used for the call to the Discover endpoint.
+func NewJWTProfileTokenSourceFromKeyFile(ctx context.Context, issuer, jsonFile string, scopes []string, options ...func(source *jwtProfileTokenSource)) (TokenSource, error) {
+	keyData, err := client.ConfigFromKeyFile(jsonFile)
+	if err != nil {
+		return nil, err
+	}
+	return NewJWTProfileTokenSource(ctx, issuer, keyData.UserID, keyData.KeyID, []byte(keyData.Key), scopes, options...)
+}
+
+// NewJWTProfileTokenSourceFromKeyFileData returns an implementation of oauth2.TokenSource
+// It will request a token using the OAuth2 JWT Profile Grant,
+// therefore sending an `assertion` by singing a JWT with the provided private key in jsonData.
+//
+// The passed context is only used for the call to the Discover endpoint.
+func NewJWTProfileTokenSourceFromKeyFileData(ctx context.Context, issuer string, jsonData []byte, scopes []string, options ...func(source *jwtProfileTokenSource)) (TokenSource, error) {
+	keyData, err := client.ConfigFromKeyFileData(jsonData)
+	if err != nil {
+		return nil, err
+	}
+	return NewJWTProfileTokenSource(ctx, issuer, keyData.UserID, keyData.KeyID, []byte(keyData.Key), scopes, options...)
+}
+
+// NewJWTProfileSource returns an implementation of oauth2.TokenSource
+// It will request a token using the OAuth2 JWT Profile Grant,
+// therefore sending an `assertion` by singing a JWT with the provided private key.
+//
+// The passed context is only used for the call to the Discover endpoint.
+func NewJWTProfileTokenSource(ctx context.Context, issuer, clientID, keyID string, key []byte, scopes []string, options ...func(source *jwtProfileTokenSource)) (TokenSource, error) {
+	signer, err := client.NewSignerFromPrivateKeyByte(key, keyID)
+	if err != nil {
+		return nil, err
+	}
+	source := &jwtProfileTokenSource{
+		clientID:   clientID,
+		audience:   []string{issuer},
+		signer:     signer,
+		scopes:     scopes,
+		httpClient: http.DefaultClient,
+	}
+	for _, opt := range options {
+		opt(source)
+	}
+	if source.tokenEndpoint == "" {
+		config, err := client.Discover(ctx, issuer, source.httpClient)
+		if err != nil {
+			return nil, err
+		}
+		source.tokenEndpoint = config.TokenEndpoint
+	}
+	return source, nil
+}
+
+func WithHTTPClient(client *http.Client) func(source *jwtProfileTokenSource) {
+	return func(source *jwtProfileTokenSource) {
+		source.httpClient = client
+	}
+}
+
+func WithStaticTokenEndpoint(issuer, tokenEndpoint string) func(source *jwtProfileTokenSource) {
+	return func(source *jwtProfileTokenSource) {
+		source.tokenEndpoint = tokenEndpoint
+	}
+}
+
+func (j *jwtProfileTokenSource) TokenEndpoint() string {
+	return j.tokenEndpoint
+}
+
+func (j *jwtProfileTokenSource) HttpClient() *http.Client {
+	return j.httpClient
+}
+
+func (j *jwtProfileTokenSource) Token() (*oauth2.Token, error) {
+	return j.TokenCtx(context.Background())
+}
+
+func (j *jwtProfileTokenSource) TokenCtx(ctx context.Context) (*oauth2.Token, error) {
+	assertion, err := client.SignedJWTProfileAssertion(j.clientID, j.audience, time.Hour, j.signer)
+	if err != nil {
+		return nil, err
+	}
+	return client.JWTProfileExchange(ctx, oidc.NewJWTProfileGrantRequest(assertion, j.scopes...), j)
+}

pkg/client/rp/cli/browser.go

@@ -1,4 +1,4 @@
-package utils
+package cli
 
 import (
 	"fmt"

pkg/client/rp/cli/cli.go

@@ -0,0 +1,36 @@
+package cli
+
+import (
+	"context"
+	"net/http"
+
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/client/rp"
+	httphelper "git.christmann.info/LARA/zitadel-oidc/v3/pkg/http"
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/oidc"
+)
+
+const (
+	loginPath = "/login"
+)
+
+func CodeFlow[C oidc.IDClaims](ctx context.Context, relyingParty rp.RelyingParty, callbackPath, port string, stateProvider func() string) *oidc.Tokens[C] {
+	codeflowCtx, codeflowCancel := context.WithCancel(ctx)
+	defer codeflowCancel()
+
+	tokenChan := make(chan *oidc.Tokens[C], 1)
+
+	callback := func(w http.ResponseWriter, r *http.Request, tokens *oidc.Tokens[C], state string, rp rp.RelyingParty) {
+		tokenChan <- tokens
+		msg := "<p><strong>Success!</strong></p>"
+		msg = msg + "<p>You are authenticated and can now return to the CLI.</p>"
+		w.Write([]byte(msg))
+	}
+	http.Handle(loginPath, rp.AuthURLHandler(stateProvider, relyingParty))
+	http.Handle(callbackPath, rp.CodeExchangeHandler(callback, relyingParty))
+
+	httphelper.StartServer(codeflowCtx, ":"+port)
+
+	OpenBrowser("http://localhost:" + port + loginPath)
+
+	return <-tokenChan
+}

pkg/client/rp/delegation.go

@@ -0,0 +1,13 @@
+package rp
+
+import (
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/oidc/grants/tokenexchange"
+)
+
+// DelegationTokenRequest is an implementation of TokenExchangeRequest
+// it exchanges an "urn:ietf:params:oauth:token-type:access_token" with an optional
+// "urn:ietf:params:oauth:token-type:access_token" actor token for an
+// "urn:ietf:params:oauth:token-type:access_token" delegation token
+func DelegationTokenRequest(subjectToken string, opts ...tokenexchange.TokenExchangeOption) *tokenexchange.TokenExchangeRequest {
+	return tokenexchange.NewTokenExchangeRequest(subjectToken, tokenexchange.AccessTokenType, opts...)
+}

pkg/client/rp/device.go

@@ -0,0 +1,69 @@
+package rp
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/client"
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/oidc"
+)
+
+func newDeviceClientCredentialsRequest(scopes []string, rp RelyingParty) (*oidc.ClientCredentialsRequest, error) {
+	confg := rp.OAuthConfig()
+	req := &oidc.ClientCredentialsRequest{
+		Scope:        scopes,
+		ClientID:     confg.ClientID,
+		ClientSecret: confg.ClientSecret,
+	}
+
+	if signer := rp.Signer(); signer != nil {
+		assertion, err := client.SignedJWTProfileAssertion(rp.OAuthConfig().ClientID, []string{rp.Issuer()}, time.Hour, signer)
+		if err != nil {
+			return nil, fmt.Errorf("failed to build assertion: %w", err)
+		}
+		req.ClientAssertion = assertion
+		req.ClientAssertionType = oidc.ClientAssertionTypeJWTAssertion
+	}
+
+	return req, nil
+}
+
+// DeviceAuthorization starts a new Device Authorization flow as defined
+// in RFC 8628, section 3.1 and 3.2:
+// https://www.rfc-editor.org/rfc/rfc8628#section-3.1
+func DeviceAuthorization(ctx context.Context, scopes []string, rp RelyingParty, authFn any) (*oidc.DeviceAuthorizationResponse, error) {
+	ctx, span := client.Tracer.Start(ctx, "DeviceAuthorization")
+	defer span.End()
+
+	ctx = logCtxWithRPData(ctx, rp, "function", "DeviceAuthorization")
+	req, err := newDeviceClientCredentialsRequest(scopes, rp)
+	if err != nil {
+		return nil, err
+	}
+
+	return client.CallDeviceAuthorizationEndpoint(ctx, req, rp, authFn)
+}
+
+// DeviceAccessToken attempts to obtain tokens from a Device Authorization,
+// by means of polling as defined in RFC, section 3.3 and 3.4:
+// https://www.rfc-editor.org/rfc/rfc8628#section-3.4
+func DeviceAccessToken(ctx context.Context, deviceCode string, interval time.Duration, rp RelyingParty) (resp *oidc.AccessTokenResponse, err error) {
+	ctx, span := client.Tracer.Start(ctx, "DeviceAccessToken")
+	defer span.End()
+
+	ctx = logCtxWithRPData(ctx, rp, "function", "DeviceAccessToken")
+	req := &client.DeviceAccessTokenRequest{
+		DeviceAccessTokenRequest: oidc.DeviceAccessTokenRequest{
+			GrantType:  oidc.GrantTypeDeviceCode,
+			DeviceCode: deviceCode,
+		},
+	}
+
+	req.ClientCredentialsRequest, err = newDeviceClientCredentialsRequest(nil, rp)
+	if err != nil {
+		return nil, err
+	}
+
+	return client.PollDeviceAccessTokenEndpoint(ctx, interval, req, tokenEndpointCaller{rp})
+}

pkg/client/rp/errors.go

@@ -0,0 +1,5 @@
+package rp
+
+import "errors"
+
+var ErrRelyingPartyNotSupportRevokeCaller = errors.New("RelyingParty does not support RevokeCaller")

pkg/client/rp/jwks.go

@@ -0,0 +1,255 @@
+package rp
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"sync"
+
+	jose "github.com/go-jose/go-jose/v4"
+
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/client"
+	httphelper "git.christmann.info/LARA/zitadel-oidc/v3/pkg/http"
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/oidc"
+)
+
+func NewRemoteKeySet(client *http.Client, jwksURL string, opts ...func(*remoteKeySet)) oidc.KeySet {
+	keyset := &remoteKeySet{httpClient: client, jwksURL: jwksURL}
+	for _, opt := range opts {
+		opt(keyset)
+	}
+	return keyset
+}
+
+// SkipRemoteCheck will suppress checking for new remote keys if signature validation fails with cached keys
+// and no kid header is set in the JWT
+//
+// this might be handy to save some unnecessary round trips in cases where the JWT does not contain a kid header and
+// there is only a single remote key
+// please notice that remote keys will then only be fetched if cached keys are empty
+func SkipRemoteCheck() func(set *remoteKeySet) {
+	return func(set *remoteKeySet) {
+		set.skipRemoteCheck = true
+	}
+}
+
+type remoteKeySet struct {
+	jwksURL         string
+	httpClient      *http.Client
+	defaultAlg      string
+	skipRemoteCheck bool
+
+	// guard all other fields
+	mu sync.Mutex
+
+	// inflight suppresses parallel execution of updateKeys and allows
+	// multiple goroutines to wait for its result.
+	inflight *inflight
+
+	// A set of cached keys and their expiry.
+	cachedKeys []jose.JSONWebKey
+}
+
+// inflight is used to wait on some in-flight request from multiple goroutines.
+type inflight struct {
+	doneCh chan struct{}
+
+	keys []jose.JSONWebKey
+	err  error
+}
+
+func newInflight() *inflight {
+	return &inflight{doneCh: make(chan struct{})}
+}
+
+// wait returns a channel that multiple goroutines can receive on. Once it returns
+// a value, the inflight request is done and result() can be inspected.
+func (i *inflight) wait() <-chan struct{} {
+	return i.doneCh
+}
+
+// done can only be called by a single goroutine. It records the result of the
+// inflight request and signals other goroutines that the result is safe to
+// inspect.
+func (i *inflight) done(keys []jose.JSONWebKey, err error) {
+	i.keys = keys
+	i.err = err
+	close(i.doneCh)
+}
+
+// result cannot be called until the wait() channel has returned a value.
+func (i *inflight) result() ([]jose.JSONWebKey, error) {
+	return i.keys, i.err
+}
+
+func (r *remoteKeySet) VerifySignature(ctx context.Context, jws *jose.JSONWebSignature) ([]byte, error) {
+	ctx, span := client.Tracer.Start(ctx, "VerifySignature")
+	defer span.End()
+
+	keyID, alg := oidc.GetKeyIDAndAlg(jws)
+	if alg == "" {
+		alg = r.defaultAlg
+	}
+	payload, err := r.verifySignatureCached(jws, keyID, alg)
+	if payload != nil {
+		return payload, nil
+	}
+	if err != nil {
+		return nil, err
+	}
+	return r.verifySignatureRemote(ctx, jws, keyID, alg)
+}
+
+// verifySignatureCached checks for a matching key in the cached key list
+//
+// if there is only one possible, it tries to verify the signature and will return the payload if successful
+//
+// it only returns an error if signature validation fails and keys exactMatch which is if either:
+// - both kid are empty and skipRemoteCheck is set to true
+// - or both (JWT and JWK) kid are equal
+//
+// otherwise it will return no error (so remote keys will be loaded)
+func (r *remoteKeySet) verifySignatureCached(jws *jose.JSONWebSignature, keyID, alg string) ([]byte, error) {
+	keys := r.keysFromCache()
+	if len(keys) == 0 {
+		return nil, nil
+	}
+	key, err := oidc.FindMatchingKey(keyID, oidc.KeyUseSignature, alg, keys...)
+	if err != nil {
+		// no key / multiple found, try with remote keys
+		return nil, nil //nolint:nilerr
+	}
+	payload, err := jws.Verify(&key)
+	if payload != nil {
+		return payload, nil
+	}
+	if !r.exactMatch(key.KeyID, keyID) {
+		// no exact key match, try getting better match with remote keys
+		return nil, nil
+	}
+	return nil, fmt.Errorf("signature verification failed: %w", err)
+}
+
+func (r *remoteKeySet) exactMatch(jwkID, jwsID string) bool {
+	if jwkID == "" && jwsID == "" {
+		return r.skipRemoteCheck
+	}
+	return jwkID == jwsID
+}
+
+func (r *remoteKeySet) verifySignatureRemote(ctx context.Context, jws *jose.JSONWebSignature, keyID, alg string) ([]byte, error) {
+	ctx, span := client.Tracer.Start(ctx, "verifySignatureRemote")
+	defer span.End()
+
+	keys, err := r.keysFromRemote(ctx)
+	if err != nil {
+		return nil, fmt.Errorf("unable to fetch key for signature validation: %w", err)
+	}
+	key, err := oidc.FindMatchingKey(keyID, oidc.KeyUseSignature, alg, keys...)
+	if err != nil {
+		return nil, fmt.Errorf("unable to validate signature: %w", err)
+	}
+	payload, err := jws.Verify(&key)
+	if err != nil {
+		return nil, fmt.Errorf("signature verification failed: %w", err)
+	}
+	return payload, nil
+}
+
+func (r *remoteKeySet) keysFromCache() (keys []jose.JSONWebKey) {
+	r.mu.Lock()
+	defer r.mu.Unlock()
+	return r.cachedKeys
+}
+
+// keysFromRemote syncs the key set from the remote set, records the values in the
+// cache, and returns the key set.
+func (r *remoteKeySet) keysFromRemote(ctx context.Context) ([]jose.JSONWebKey, error) {
+	ctx, span := client.Tracer.Start(ctx, "keysFromRemote")
+	defer span.End()
+
+	// Need to lock to inspect the inflight request field.
+	r.mu.Lock()
+	// If there's not a current inflight request, create one.
+	if r.inflight == nil {
+		r.inflight = newInflight()
+
+		// This goroutine has exclusive ownership over the current inflight
+		// request. It releases the resource by nil'ing the inflight field
+		// once the goroutine is done.
+		go r.updateKeys(ctx)
+	}
+	inflight := r.inflight
+	r.mu.Unlock()
+
+	select {
+	case <-ctx.Done():
+		return nil, ctx.Err()
+	case <-inflight.wait():
+		return inflight.result()
+	}
+}
+
+func (r *remoteKeySet) updateKeys(ctx context.Context) {
+	ctx, span := client.Tracer.Start(ctx, "updateKeys")
+	defer span.End()
+
+	// Sync keys and finish inflight when that's done.
+	keys, err := r.fetchRemoteKeys(ctx)
+
+	r.inflight.done(keys, err)
+
+	// Lock to update the keys and indicate that there is no longer an
+	// inflight request.
+	r.mu.Lock()
+	defer r.mu.Unlock()
+
+	if err == nil {
+		r.cachedKeys = keys
+	}
+
+	// Free inflight so a different request can run.
+	r.inflight = nil
+}
+
+func (r *remoteKeySet) fetchRemoteKeys(ctx context.Context) ([]jose.JSONWebKey, error) {
+	ctx, span := client.Tracer.Start(ctx, "fetchRemoteKeys")
+	defer span.End()
+
+	req, err := http.NewRequestWithContext(ctx, "GET", r.jwksURL, nil)
+	if err != nil {
+		return nil, fmt.Errorf("oidc: can't create request: %v", err)
+	}
+
+	keySet := new(jsonWebKeySet)
+	if err = httphelper.HttpRequest(r.httpClient, req, keySet); err != nil {
+		return nil, fmt.Errorf("oidc: failed to get keys: %v", err)
+	}
+	return keySet.Keys, nil
+}
+
+// jsonWebKeySet is an alias for jose.JSONWebKeySet which ignores unknown key types (kty)
+type jsonWebKeySet jose.JSONWebKeySet
+
+// UnmarshalJSON overrides the default jose.JSONWebKeySet method to ignore any error
+// which might occur because of unknown key types (kty)
+func (k *jsonWebKeySet) UnmarshalJSON(data []byte) (err error) {
+	var raw rawJSONWebKeySet
+	err = json.Unmarshal(data, &raw)
+	if err != nil {
+		return err
+	}
+	for _, key := range raw.Keys {
+		webKey := new(jose.JSONWebKey)
+		err = webKey.UnmarshalJSON(key)
+		if err == nil {
+			k.Keys = append(k.Keys, *webKey)
+		}
+	}
+	return nil
+}
+
+type rawJSONWebKeySet struct {
+	Keys []json.RawMessage `json:"keys"`
+}

pkg/client/rp/log.go

@@ -0,0 +1,17 @@
+package rp
+
+import (
+	"context"
+	"log/slog"
+
+	"github.com/zitadel/logging"
+)
+
+func logCtxWithRPData(ctx context.Context, rp RelyingParty, attrs ...any) context.Context {
+	logger, ok := rp.Logger(ctx)
+	if !ok {
+		return ctx
+	}
+	logger = logger.With(slog.Group("rp", attrs...))
+	return logging.ToContext(ctx, logger)
+}

pkg/client/rp/relying_party.go

@@ -0,0 +1,820 @@
+package rp
+
+import (
+	"context"
+	"encoding/base64"
+	"errors"
+	"log/slog"
+	"net/http"
+	"net/url"
+	"time"
+
+	"github.com/go-jose/go-jose/v4"
+	"github.com/google/uuid"
+	"golang.org/x/oauth2"
+	"golang.org/x/oauth2/clientcredentials"
+
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/client"
+	httphelper "git.christmann.info/LARA/zitadel-oidc/v3/pkg/http"
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/oidc"
+	"github.com/zitadel/logging"
+)
+
+const (
+	idTokenKey = "id_token"
+	stateParam = "state"
+	pkceCode   = "pkce"
+)
+
+var ErrUserInfoSubNotMatching = errors.New("sub from userinfo does not match the sub from the id_token")
+
+// RelyingParty declares the minimal interface for oidc clients
+type RelyingParty interface {
+	// OAuthConfig returns the oauth2 Config
+	OAuthConfig() *oauth2.Config
+
+	// Issuer returns the issuer of the oidc config
+	Issuer() string
+
+	// IsPKCE returns if authorization is done using `Authorization Code Flow with Proof Key for Code Exchange (PKCE)`
+	IsPKCE() bool
+
+	// CookieHandler returns a http cookie handler used for various state transfer cookies
+	CookieHandler() *httphelper.CookieHandler
+
+	// HttpClient returns a http client used for calls to the openid provider, e.g. calling token endpoint
+	HttpClient() *http.Client
+
+	// IsOAuth2Only specifies whether relaying party handles only oauth2 or oidc calls
+	IsOAuth2Only() bool
+
+	// Signer is used if the relaying party uses the JWT Profile
+	Signer() jose.Signer
+
+	// GetEndSessionEndpoint returns the endpoint to sign out on a IDP
+	GetEndSessionEndpoint() string
+
+	// GetRevokeEndpoint returns the endpoint to revoke a specific token
+	GetRevokeEndpoint() string
+
+	// UserinfoEndpoint returns the userinfo
+	UserinfoEndpoint() string
+
+	// GetDeviceAuthorizationEndpoint returns the endpoint which can
+	// be used to start a DeviceAuthorization flow.
+	GetDeviceAuthorizationEndpoint() string
+
+	// IDTokenVerifier returns the verifier used for oidc id_token verification
+	IDTokenVerifier() *IDTokenVerifier
+
+	// ErrorHandler returns the handler used for callback errors
+	ErrorHandler() func(http.ResponseWriter, *http.Request, string, string, string)
+
+	// Logger from the context, or a fallback if set.
+	Logger(context.Context) (logger *slog.Logger, ok bool)
+}
+
+type HasUnauthorizedHandler interface {
+	// UnauthorizedHandler returns the handler used for unauthorized errors
+	UnauthorizedHandler() func(w http.ResponseWriter, r *http.Request, desc string, state string)
+}
+
+type ErrorHandler func(w http.ResponseWriter, r *http.Request, errorType string, errorDesc string, state string)
+type UnauthorizedHandler func(w http.ResponseWriter, r *http.Request, desc string, state string)
+
+var DefaultErrorHandler ErrorHandler = func(w http.ResponseWriter, r *http.Request, errorType string, errorDesc string, state string) {
+	http.Error(w, errorType+": "+errorDesc, http.StatusInternalServerError)
+}
+var DefaultUnauthorizedHandler UnauthorizedHandler = func(w http.ResponseWriter, r *http.Request, desc string, state string) {
+	http.Error(w, desc, http.StatusUnauthorized)
+}
+
+type relyingParty struct {
+	issuer                      string
+	DiscoveryEndpoint           string
+	endpoints                   Endpoints
+	oauthConfig                 *oauth2.Config
+	oauth2Only                  bool
+	pkce                        bool
+	useSigningAlgsFromDiscovery bool
+
+	httpClient    *http.Client
+	cookieHandler *httphelper.CookieHandler
+
+	oauthAuthStyle oauth2.AuthStyle
+
+	errorHandler        func(http.ResponseWriter, *http.Request, string, string, string)
+	unauthorizedHandler func(http.ResponseWriter, *http.Request, string, string)
+	idTokenVerifier     *IDTokenVerifier
+	verifierOpts        []VerifierOption
+	signer              jose.Signer
+	logger              *slog.Logger
+}
+
+func (rp *relyingParty) OAuthConfig() *oauth2.Config {
+	return rp.oauthConfig
+}
+
+func (rp *relyingParty) Issuer() string {
+	return rp.issuer
+}
+
+func (rp *relyingParty) IsPKCE() bool {
+	return rp.pkce
+}
+
+func (rp *relyingParty) CookieHandler() *httphelper.CookieHandler {
+	return rp.cookieHandler
+}
+
+func (rp *relyingParty) HttpClient() *http.Client {
+	return rp.httpClient
+}
+
+func (rp *relyingParty) IsOAuth2Only() bool {
+	return rp.oauth2Only
+}
+
+func (rp *relyingParty) Signer() jose.Signer {
+	return rp.signer
+}
+
+func (rp *relyingParty) UserinfoEndpoint() string {
+	return rp.endpoints.UserinfoURL
+}
+
+func (rp *relyingParty) GetDeviceAuthorizationEndpoint() string {
+	return rp.endpoints.DeviceAuthorizationURL
+}
+
+func (rp *relyingParty) GetEndSessionEndpoint() string {
+	return rp.endpoints.EndSessionURL
+}
+
+func (rp *relyingParty) GetRevokeEndpoint() string {
+	return rp.endpoints.RevokeURL
+}
+
+func (rp *relyingParty) IDTokenVerifier() *IDTokenVerifier {
+	if rp.idTokenVerifier == nil {
+		rp.idTokenVerifier = NewIDTokenVerifier(rp.issuer, rp.oauthConfig.ClientID, NewRemoteKeySet(rp.httpClient, rp.endpoints.JKWsURL), rp.verifierOpts...)
+	}
+	return rp.idTokenVerifier
+}
+
+func (rp *relyingParty) ErrorHandler() func(http.ResponseWriter, *http.Request, string, string, string) {
+	if rp.errorHandler == nil {
+		rp.errorHandler = DefaultErrorHandler
+	}
+	return rp.errorHandler
+}
+
+func (rp *relyingParty) UnauthorizedHandler() func(http.ResponseWriter, *http.Request, string, string) {
+	if rp.unauthorizedHandler == nil {
+		rp.unauthorizedHandler = DefaultUnauthorizedHandler
+	}
+	return rp.unauthorizedHandler
+}
+
+func (rp *relyingParty) Logger(ctx context.Context) (logger *slog.Logger, ok bool) {
+	logger, ok = logging.FromContext(ctx)
+	if ok {
+		return logger, ok
+	}
+	return rp.logger, rp.logger != nil
+}
+
+// NewRelyingPartyOAuth creates an (OAuth2) RelyingParty with the given
+// OAuth2 Config and possible configOptions
+// it will use the AuthURL and TokenURL set in config
+func NewRelyingPartyOAuth(config *oauth2.Config, options ...Option) (RelyingParty, error) {
+	rp := &relyingParty{
+		oauthConfig:         config,
+		httpClient:          httphelper.DefaultHTTPClient,
+		oauth2Only:          true,
+		unauthorizedHandler: DefaultUnauthorizedHandler,
+		oauthAuthStyle:      oauth2.AuthStyleAutoDetect,
+	}
+
+	for _, optFunc := range options {
+		if err := optFunc(rp); err != nil {
+			return nil, err
+		}
+	}
+
+	rp.oauthConfig.Endpoint.AuthStyle = rp.oauthAuthStyle
+
+	// avoid races by calling these early
+	_ = rp.IDTokenVerifier()     // sets idTokenVerifier
+	_ = rp.ErrorHandler()        // sets errorHandler
+	_ = rp.UnauthorizedHandler() // sets unauthorizedHandler
+
+	return rp, nil
+}
+
+// NewRelyingPartyOIDC creates an (OIDC) RelyingParty with the given
+// issuer, clientID, clientSecret, redirectURI, scopes and possible configOptions
+// it will run discovery on the provided issuer and use the found endpoints
+func NewRelyingPartyOIDC(ctx context.Context, issuer, clientID, clientSecret, redirectURI string, scopes []string, options ...Option) (RelyingParty, error) {
+	rp := &relyingParty{
+		issuer: issuer,
+		oauthConfig: &oauth2.Config{
+			ClientID:     clientID,
+			ClientSecret: clientSecret,
+			RedirectURL:  redirectURI,
+			Scopes:       scopes,
+		},
+		httpClient:     httphelper.DefaultHTTPClient,
+		oauth2Only:     false,
+		oauthAuthStyle: oauth2.AuthStyleAutoDetect,
+	}
+
+	for _, optFunc := range options {
+		if err := optFunc(rp); err != nil {
+			return nil, err
+		}
+	}
+	ctx = logCtxWithRPData(ctx, rp, "function", "NewRelyingPartyOIDC")
+	discoveryConfiguration, err := client.Discover(ctx, rp.issuer, rp.httpClient, rp.DiscoveryEndpoint)
+	if err != nil {
+		return nil, err
+	}
+	if rp.useSigningAlgsFromDiscovery {
+		rp.verifierOpts = append(rp.verifierOpts, WithSupportedSigningAlgorithms(discoveryConfiguration.IDTokenSigningAlgValuesSupported...))
+	}
+	endpoints := GetEndpoints(discoveryConfiguration)
+	rp.oauthConfig.Endpoint = endpoints.Endpoint
+	rp.endpoints = endpoints
+
+	rp.oauthConfig.Endpoint.AuthStyle = rp.oauthAuthStyle
+	rp.endpoints.Endpoint.AuthStyle = rp.oauthAuthStyle
+
+	// avoid races by calling these early
+	_ = rp.IDTokenVerifier()     // sets idTokenVerifier
+	_ = rp.ErrorHandler()        // sets errorHandler
+	_ = rp.UnauthorizedHandler() // sets unauthorizedHandler
+
+	return rp, nil
+}
+
+// Option is the type for providing dynamic options to the relyingParty
+type Option func(*relyingParty) error
+
+func WithCustomDiscoveryUrl(url string) Option {
+	return func(rp *relyingParty) error {
+		rp.DiscoveryEndpoint = url
+		return nil
+	}
+}
+
+// WithCookieHandler set a `CookieHandler` for securing the various redirects
+func WithCookieHandler(cookieHandler *httphelper.CookieHandler) Option {
+	return func(rp *relyingParty) error {
+		rp.cookieHandler = cookieHandler
+		return nil
+	}
+}
+
+// WithPKCE sets the RP to use PKCE (oauth2 code challenge)
+// it also sets a `CookieHandler` for securing the various redirects
+// and exchanging the code challenge
+func WithPKCE(cookieHandler *httphelper.CookieHandler) Option {
+	return func(rp *relyingParty) error {
+		rp.pkce = true
+		rp.cookieHandler = cookieHandler
+		return nil
+	}
+}
+
+// WithHTTPClient provides the ability to set an http client to be used for the relaying party and verifier
+func WithHTTPClient(client *http.Client) Option {
+	return func(rp *relyingParty) error {
+		rp.httpClient = client
+		return nil
+	}
+}
+
+func WithErrorHandler(errorHandler ErrorHandler) Option {
+	return func(rp *relyingParty) error {
+		rp.errorHandler = errorHandler
+		return nil
+	}
+}
+
+func WithUnauthorizedHandler(unauthorizedHandler UnauthorizedHandler) Option {
+	return func(rp *relyingParty) error {
+		rp.unauthorizedHandler = unauthorizedHandler
+		return nil
+	}
+}
+
+func WithAuthStyle(oauthAuthStyle oauth2.AuthStyle) Option {
+	return func(rp *relyingParty) error {
+		rp.oauthAuthStyle = oauthAuthStyle
+		return nil
+	}
+}
+
+func WithVerifierOpts(opts ...VerifierOption) Option {
+	return func(rp *relyingParty) error {
+		rp.verifierOpts = opts
+		return nil
+	}
+}
+
+// WithClientKey specifies the path to the key.json to be used for the JWT Profile Client Authentication on the token endpoint
+//
+// deprecated: use WithJWTProfile(SignerFromKeyPath(path)) instead
+func WithClientKey(path string) Option {
+	return WithJWTProfile(SignerFromKeyPath(path))
+}
+
+// WithJWTProfile creates a signer used for the JWT Profile Client Authentication on the token endpoint
+// When creating the signer, be sure to include the KeyID in the SigningKey.
+// See client.NewSignerFromPrivateKeyByte for an example.
+func WithJWTProfile(signerFromKey SignerFromKey) Option {
+	return func(rp *relyingParty) error {
+		signer, err := signerFromKey()
+		if err != nil {
+			return err
+		}
+		rp.signer = signer
+		return nil
+	}
+}
+
+// WithLogger sets a logger that is used
+// in case the request context does not contain a logger.
+func WithLogger(logger *slog.Logger) Option {
+	return func(rp *relyingParty) error {
+		rp.logger = logger
+		return nil
+	}
+}
+
+// WithSigningAlgsFromDiscovery appends the [WithSupportedSigningAlgorithms] option to the Verifier Options.
+// The algorithms returned in the `id_token_signing_alg_values_supported` from the discovery response will be set.
+func WithSigningAlgsFromDiscovery() Option {
+	return func(rp *relyingParty) error {
+		rp.useSigningAlgsFromDiscovery = true
+		return nil
+	}
+}
+
+type SignerFromKey func() (jose.Signer, error)
+
+func SignerFromKeyPath(path string) SignerFromKey {
+	return func() (jose.Signer, error) {
+		config, err := client.ConfigFromKeyFile(path)
+		if err != nil {
+			return nil, err
+		}
+		return client.NewSignerFromPrivateKeyByte([]byte(config.Key), config.KeyID)
+	}
+}
+
+func SignerFromKeyFile(fileData []byte) SignerFromKey {
+	return func() (jose.Signer, error) {
+		config, err := client.ConfigFromKeyFileData(fileData)
+		if err != nil {
+			return nil, err
+		}
+		return client.NewSignerFromPrivateKeyByte([]byte(config.Key), config.KeyID)
+	}
+}
+
+func SignerFromKeyAndKeyID(key []byte, keyID string) SignerFromKey {
+	return func() (jose.Signer, error) {
+		return client.NewSignerFromPrivateKeyByte(key, keyID)
+	}
+}
+
+// AuthURL returns the auth request url
+// (wrapping the oauth2 `AuthCodeURL`)
+func AuthURL(state string, rp RelyingParty, opts ...AuthURLOpt) string {
+	authOpts := make([]oauth2.AuthCodeOption, 0)
+	for _, opt := range opts {
+		authOpts = append(authOpts, opt()...)
+	}
+	return rp.OAuthConfig().AuthCodeURL(state, authOpts...)
+}
+
+// AuthURLHandler extends the `AuthURL` method with a http redirect handler
+// including handling setting cookie for secure `state` transfer.
+// Custom parameters can optionally be set to the redirect URL.
+func AuthURLHandler(stateFn func() string, rp RelyingParty, urlParam ...URLParamOpt) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		opts := make([]AuthURLOpt, len(urlParam))
+		for i, p := range urlParam {
+			opts[i] = AuthURLOpt(p)
+		}
+
+		state := stateFn()
+		if err := trySetStateCookie(w, state, rp); err != nil {
+			unauthorizedError(w, r, "failed to create state cookie: "+err.Error(), state, rp)
+			return
+		}
+		if rp.IsPKCE() {
+			codeChallenge, err := GenerateAndStoreCodeChallenge(w, rp)
+			if err != nil {
+				unauthorizedError(w, r, "failed to create code challenge: "+err.Error(), state, rp)
+				return
+			}
+			opts = append(opts, WithCodeChallenge(codeChallenge))
+		}
+
+		http.Redirect(w, r, AuthURL(state, rp, opts...), http.StatusFound)
+	}
+}
+
+// GenerateAndStoreCodeChallenge generates a PKCE code challenge and stores its verifier into a secure cookie
+func GenerateAndStoreCodeChallenge(w http.ResponseWriter, rp RelyingParty) (string, error) {
+	codeVerifier := base64.RawURLEncoding.EncodeToString([]byte(uuid.New().String()))
+	if err := rp.CookieHandler().SetCookie(w, pkceCode, codeVerifier); err != nil {
+		return "", err
+	}
+	return oidc.NewSHACodeChallenge(codeVerifier), nil
+}
+
+// ErrMissingIDToken is returned when an id_token was expected,
+// but not received in the token response.
+var ErrMissingIDToken = errors.New("id_token missing")
+
+func verifyTokenResponse[C oidc.IDClaims](ctx context.Context, token *oauth2.Token, rp RelyingParty) (*oidc.Tokens[C], error) {
+	ctx, span := client.Tracer.Start(ctx, "verifyTokenResponse")
+	defer span.End()
+
+	if rp.IsOAuth2Only() {
+		return &oidc.Tokens[C]{Token: token}, nil
+	}
+	idTokenString, ok := token.Extra(idTokenKey).(string)
+	if !ok {
+		return &oidc.Tokens[C]{Token: token}, ErrMissingIDToken
+	}
+	idToken, err := VerifyTokens[C](ctx, token.AccessToken, idTokenString, rp.IDTokenVerifier())
+	if err != nil {
+		return nil, err
+	}
+	return &oidc.Tokens[C]{Token: token, IDTokenClaims: idToken, IDToken: idTokenString}, nil
+}
+
+// CodeExchange handles the oauth2 code exchange, extracting and validating the id_token
+// returning it parsed together with the oauth2 tokens (access, refresh)
+func CodeExchange[C oidc.IDClaims](ctx context.Context, code string, rp RelyingParty, opts ...CodeExchangeOpt) (tokens *oidc.Tokens[C], err error) {
+	ctx, codeExchangeSpan := client.Tracer.Start(ctx, "CodeExchange")
+	defer codeExchangeSpan.End()
+
+	ctx = logCtxWithRPData(ctx, rp, "function", "CodeExchange")
+	ctx = context.WithValue(ctx, oauth2.HTTPClient, rp.HttpClient())
+	codeOpts := make([]oauth2.AuthCodeOption, 0)
+	for _, opt := range opts {
+		codeOpts = append(codeOpts, opt()...)
+	}
+
+	ctx, oauthExchangeSpan := client.Tracer.Start(ctx, "OAuthExchange")
+	token, err := rp.OAuthConfig().Exchange(ctx, code, codeOpts...)
+	if err != nil {
+		return nil, err
+	}
+	oauthExchangeSpan.End()
+	return verifyTokenResponse[C](ctx, token, rp)
+}
+
+// ClientCredentials requests an access token using the `client_credentials` grant,
+// as defined in [RFC 6749, section 4.4].
+//
+// As there is no user associated to the request an ID Token can never be returned.
+// Client Credentials are undefined in OpenID Connect and is a pure OAuth2 grant.
+// Furthermore the server SHOULD NOT return a refresh token.
+//
+// [RFC 6749, section 4.4]: https://datatracker.ietf.org/doc/html/rfc6749#section-4.4
+func ClientCredentials(ctx context.Context, rp RelyingParty, endpointParams url.Values) (token *oauth2.Token, err error) {
+	ctx = logCtxWithRPData(ctx, rp, "function", "ClientCredentials")
+	ctx, span := client.Tracer.Start(ctx, "ClientCredentials")
+	defer span.End()
+
+	ctx = context.WithValue(ctx, oauth2.HTTPClient, rp.HttpClient())
+	config := clientcredentials.Config{
+		ClientID:       rp.OAuthConfig().ClientID,
+		ClientSecret:   rp.OAuthConfig().ClientSecret,
+		TokenURL:       rp.OAuthConfig().Endpoint.TokenURL,
+		Scopes:         rp.OAuthConfig().Scopes,
+		EndpointParams: endpointParams,
+		AuthStyle:      rp.OAuthConfig().Endpoint.AuthStyle,
+	}
+	return config.Token(ctx)
+}
+
+type CodeExchangeCallback[C oidc.IDClaims] func(w http.ResponseWriter, r *http.Request, tokens *oidc.Tokens[C], state string, rp RelyingParty)
+
+// CodeExchangeHandler extends the `CodeExchange` method with a http handler
+// including cookie handling for secure `state` transfer
+// and optional PKCE code verifier checking.
+// Custom parameters can optionally be set to the token URL.
+func CodeExchangeHandler[C oidc.IDClaims](callback CodeExchangeCallback[C], rp RelyingParty, urlParam ...URLParamOpt) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		ctx, span := client.Tracer.Start(r.Context(), "CodeExchangeHandler")
+		r = r.WithContext(ctx)
+		defer span.End()
+
+		state, err := tryReadStateCookie(w, r, rp)
+		if err != nil {
+			unauthorizedError(w, r, "failed to get state: "+err.Error(), state, rp)
+			return
+		}
+		if errValue := r.FormValue("error"); errValue != "" {
+			rp.ErrorHandler()(w, r, errValue, r.FormValue("error_description"), state)
+			return
+		}
+		codeOpts := make([]CodeExchangeOpt, len(urlParam))
+		for i, p := range urlParam {
+			codeOpts[i] = CodeExchangeOpt(p)
+		}
+
+		if rp.IsPKCE() {
+			codeVerifier, err := rp.CookieHandler().CheckCookie(r, pkceCode)
+			if err != nil {
+				unauthorizedError(w, r, "failed to get code verifier: "+err.Error(), state, rp)
+				return
+			}
+			codeOpts = append(codeOpts, WithCodeVerifier(codeVerifier))
+			rp.CookieHandler().DeleteCookie(w, pkceCode)
+		}
+		if rp.Signer() != nil {
+			assertion, err := client.SignedJWTProfileAssertion(rp.OAuthConfig().ClientID, []string{rp.Issuer(), rp.OAuthConfig().Endpoint.TokenURL}, time.Hour, rp.Signer())
+			if err != nil {
+				unauthorizedError(w, r, "failed to build assertion: "+err.Error(), state, rp)
+				return
+			}
+			codeOpts = append(codeOpts, WithClientAssertionJWT(assertion))
+		}
+		tokens, err := CodeExchange[C](r.Context(), r.FormValue("code"), rp, codeOpts...)
+		if err != nil {
+			unauthorizedError(w, r, "failed to exchange token: "+err.Error(), state, rp)
+			return
+		}
+		callback(w, r, tokens, state, rp)
+	}
+}
+
+type SubjectGetter interface {
+	GetSubject() string
+}
+
+type CodeExchangeUserinfoCallback[C oidc.IDClaims, U SubjectGetter] func(w http.ResponseWriter, r *http.Request, tokens *oidc.Tokens[C], state string, provider RelyingParty, info U)
+
+// UserinfoCallback wraps the callback function of the CodeExchangeHandler
+// and calls the userinfo endpoint with the access token
+// on success it will pass the userinfo into its callback function as well
+func UserinfoCallback[C oidc.IDClaims, U SubjectGetter](f CodeExchangeUserinfoCallback[C, U]) CodeExchangeCallback[C] {
+	return func(w http.ResponseWriter, r *http.Request, tokens *oidc.Tokens[C], state string, rp RelyingParty) {
+		ctx, span := client.Tracer.Start(r.Context(), "UserinfoCallback")
+		r = r.WithContext(ctx)
+		defer span.End()
+
+		info, err := Userinfo[U](r.Context(), tokens.AccessToken, tokens.TokenType, tokens.IDTokenClaims.GetSubject(), rp)
+		if err != nil {
+			unauthorizedError(w, r, "userinfo failed: "+err.Error(), state, rp)
+			return
+		}
+		f(w, r, tokens, state, rp, info)
+	}
+}
+
+// Userinfo will call the OIDC [UserInfo] Endpoint with the provided token and returns
+// the response in an instance of type U.
+// [*oidc.UserInfo] can be used as a good example, or use a custom type if type-safe
+// access to custom claims is needed.
+//
+// [UserInfo]: https://openid.net/specs/openid-connect-core-1_0.html#UserInfo
+func Userinfo[U SubjectGetter](ctx context.Context, token, tokenType, subject string, rp RelyingParty) (userinfo U, err error) {
+	var nilU U
+	ctx = logCtxWithRPData(ctx, rp, "function", "Userinfo")
+	ctx, span := client.Tracer.Start(ctx, "Userinfo")
+	defer span.End()
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, rp.UserinfoEndpoint(), nil)
+	if err != nil {
+		return nilU, err
+	}
+	req.Header.Set("authorization", tokenType+" "+token)
+	if err := httphelper.HttpRequest(rp.HttpClient(), req, &userinfo); err != nil {
+		return nilU, err
+	}
+	if userinfo.GetSubject() != subject {
+		return nilU, ErrUserInfoSubNotMatching
+	}
+	return userinfo, nil
+}
+
+func trySetStateCookie(w http.ResponseWriter, state string, rp RelyingParty) error {
+	if rp.CookieHandler() != nil {
+		if err := rp.CookieHandler().SetCookie(w, stateParam, state); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func tryReadStateCookie(w http.ResponseWriter, r *http.Request, rp RelyingParty) (state string, err error) {
+	if rp.CookieHandler() == nil {
+		return r.FormValue(stateParam), nil
+	}
+	state, err = rp.CookieHandler().CheckQueryCookie(r, stateParam)
+	if err != nil {
+		return "", err
+	}
+	rp.CookieHandler().DeleteCookie(w, stateParam)
+	return state, nil
+}
+
+type OptionFunc func(RelyingParty)
+
+type Endpoints struct {
+	oauth2.Endpoint
+	IntrospectURL          string
+	UserinfoURL            string
+	JKWsURL                string
+	EndSessionURL          string
+	RevokeURL              string
+	DeviceAuthorizationURL string
+}
+
+func GetEndpoints(discoveryConfig *oidc.DiscoveryConfiguration) Endpoints {
+	return Endpoints{
+		Endpoint: oauth2.Endpoint{
+			AuthURL:  discoveryConfig.AuthorizationEndpoint,
+			TokenURL: discoveryConfig.TokenEndpoint,
+		},
+		IntrospectURL:          discoveryConfig.IntrospectionEndpoint,
+		UserinfoURL:            discoveryConfig.UserinfoEndpoint,
+		JKWsURL:                discoveryConfig.JwksURI,
+		EndSessionURL:          discoveryConfig.EndSessionEndpoint,
+		RevokeURL:              discoveryConfig.RevocationEndpoint,
+		DeviceAuthorizationURL: discoveryConfig.DeviceAuthorizationEndpoint,
+	}
+}
+
+// withURLParam sets custom url parameters.
+// This is the generalized, unexported, function used by both
+// URLParamOpt and AuthURLOpt.
+func withURLParam(key, value string) func() []oauth2.AuthCodeOption {
+	return func() []oauth2.AuthCodeOption {
+		return []oauth2.AuthCodeOption{
+			oauth2.SetAuthURLParam(key, value),
+		}
+	}
+}
+
+// withPrompt sets the `prompt` params in the auth request
+// This is the generalized, unexported, function used by both
+// URLParamOpt and AuthURLOpt.
+func withPrompt(prompt ...string) func() []oauth2.AuthCodeOption {
+	return withURLParam("prompt", oidc.SpaceDelimitedArray(prompt).String())
+}
+
+type URLParamOpt func() []oauth2.AuthCodeOption
+
+// WithURLParam allows setting custom key-vale pairs
+// to an OAuth2 URL.
+func WithURLParam(key, value string) URLParamOpt {
+	return withURLParam(key, value)
+}
+
+// WithPromptURLParam sets the `prompt` parameter in a URL.
+func WithPromptURLParam(prompt ...string) URLParamOpt {
+	return withPrompt(prompt...)
+}
+
+// WithResponseModeURLParam sets the `response_mode` parameter in a URL.
+func WithResponseModeURLParam(mode oidc.ResponseMode) URLParamOpt {
+	return withURLParam("response_mode", string(mode))
+}
+
+type AuthURLOpt func() []oauth2.AuthCodeOption
+
+// WithCodeChallenge sets the `code_challenge` params in the auth request
+func WithCodeChallenge(codeChallenge string) AuthURLOpt {
+	return func() []oauth2.AuthCodeOption {
+		return []oauth2.AuthCodeOption{
+			oauth2.SetAuthURLParam("code_challenge", codeChallenge),
+			oauth2.SetAuthURLParam("code_challenge_method", "S256"),
+		}
+	}
+}
+
+// WithPrompt sets the `prompt` params in the auth request
+func WithPrompt(prompt ...string) AuthURLOpt {
+	return withPrompt(prompt...)
+}
+
+type CodeExchangeOpt func() []oauth2.AuthCodeOption
+
+// WithCodeVerifier sets the `code_verifier` param in the token request
+func WithCodeVerifier(codeVerifier string) CodeExchangeOpt {
+	return func() []oauth2.AuthCodeOption {
+		return []oauth2.AuthCodeOption{oauth2.SetAuthURLParam("code_verifier", codeVerifier)}
+	}
+}
+
+// WithClientAssertionJWT sets the `client_assertion` param in the token request
+func WithClientAssertionJWT(clientAssertion string) CodeExchangeOpt {
+	return func() []oauth2.AuthCodeOption {
+		return client.ClientAssertionCodeOptions(clientAssertion)
+	}
+}
+
+type tokenEndpointCaller struct {
+	RelyingParty
+}
+
+func (t tokenEndpointCaller) TokenEndpoint() string {
+	return t.OAuthConfig().Endpoint.TokenURL
+}
+
+type RefreshTokenRequest struct {
+	RefreshToken        string                   `schema:"refresh_token"`
+	Scopes              oidc.SpaceDelimitedArray `schema:"scope,omitempty"`
+	ClientID            string                   `schema:"client_id,omitempty"`
+	ClientSecret        string                   `schema:"client_secret,omitempty"`
+	ClientAssertion     string                   `schema:"client_assertion,omitempty"`
+	ClientAssertionType string                   `schema:"client_assertion_type,omitempty"`
+	GrantType           oidc.GrantType           `schema:"grant_type"`
+}
+
+// RefreshTokens performs a token refresh. If it doesn't error, it will always
+// provide a new AccessToken. It may provide a new RefreshToken, and if it does, then
+// the old one should be considered invalid.
+//
+// In case the RP is not OAuth2 only and an IDToken was part of the response,
+// the IDToken and AccessToken will be verified
+// and the IDToken and IDTokenClaims fields will be populated in the returned object.
+func RefreshTokens[C oidc.IDClaims](ctx context.Context, rp RelyingParty, refreshToken, clientAssertion, clientAssertionType string) (*oidc.Tokens[C], error) {
+	ctx, span := client.Tracer.Start(ctx, "RefreshTokens")
+	defer span.End()
+
+	ctx = logCtxWithRPData(ctx, rp, "function", "RefreshTokens")
+	request := RefreshTokenRequest{
+		RefreshToken:        refreshToken,
+		Scopes:              rp.OAuthConfig().Scopes,
+		ClientID:            rp.OAuthConfig().ClientID,
+		ClientSecret:        rp.OAuthConfig().ClientSecret,
+		ClientAssertion:     clientAssertion,
+		ClientAssertionType: clientAssertionType,
+		GrantType:           oidc.GrantTypeRefreshToken,
+	}
+	newToken, err := client.CallTokenEndpoint(ctx, request, tokenEndpointCaller{RelyingParty: rp})
+	if err != nil {
+		return nil, err
+	}
+	tokens, err := verifyTokenResponse[C](ctx, newToken, rp)
+	if err == nil || errors.Is(err, ErrMissingIDToken) {
+		// https://openid.net/specs/openid-connect-core-1_0.html#RefreshTokenResponse
+		// ...except that it might not contain an id_token.
+		return tokens, nil
+	}
+	return nil, err
+}
+
+func EndSession(ctx context.Context, rp RelyingParty, idToken, optionalRedirectURI, optionalState string) (*url.URL, error) {
+	ctx = logCtxWithRPData(ctx, rp, "function", "EndSession")
+	ctx, span := client.Tracer.Start(ctx, "RefreshTokens")
+	defer span.End()
+
+	request := oidc.EndSessionRequest{
+		IdTokenHint:           idToken,
+		ClientID:              rp.OAuthConfig().ClientID,
+		PostLogoutRedirectURI: optionalRedirectURI,
+		State:                 optionalState,
+	}
+	return client.CallEndSessionEndpoint(ctx, request, nil, rp)
+}
+
+// RevokeToken requires a RelyingParty that is also a client.RevokeCaller.  The RelyingParty
+// returned by NewRelyingPartyOIDC() meets that criteria, but the one returned by
+// NewRelyingPartyOAuth() does not.
+//
+// tokenTypeHint should be either "id_token" or "refresh_token".
+func RevokeToken(ctx context.Context, rp RelyingParty, token string, tokenTypeHint string) error {
+	ctx = logCtxWithRPData(ctx, rp, "function", "RevokeToken")
+	ctx, span := client.Tracer.Start(ctx, "RefreshTokens")
+	defer span.End()
+	request := client.RevokeRequest{
+		Token:         token,
+		TokenTypeHint: tokenTypeHint,
+		ClientID:      rp.OAuthConfig().ClientID,
+		ClientSecret:  rp.OAuthConfig().ClientSecret,
+	}
+	if rc, ok := rp.(client.RevokeCaller); ok && rc.GetRevokeEndpoint() != "" {
+		return client.CallRevokeEndpoint(ctx, request, nil, rc)
+	}
+	return ErrRelyingPartyNotSupportRevokeCaller
+}
+
+func unauthorizedError(w http.ResponseWriter, r *http.Request, desc string, state string, rp RelyingParty) {
+	if rp, ok := rp.(HasUnauthorizedHandler); ok {
+		rp.UnauthorizedHandler()(w, r, desc, state)
+		return
+	}
+	http.Error(w, desc, http.StatusUnauthorized)
+}

pkg/client/rp/relying_party_test.go

@@ -0,0 +1,107 @@
+package rp
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	tu "git.christmann.info/LARA/zitadel-oidc/v3/internal/testutil"
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/oidc"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"golang.org/x/oauth2"
+)
+
+func Test_verifyTokenResponse(t *testing.T) {
+	verifier := &IDTokenVerifier{
+		Issuer:            tu.ValidIssuer,
+		MaxAgeIAT:         2 * time.Minute,
+		ClientID:          tu.ValidClientID,
+		Offset:            time.Second,
+		SupportedSignAlgs: []string{string(tu.SignatureAlgorithm)},
+		KeySet:            tu.KeySet{},
+		MaxAge:            2 * time.Minute,
+		ACR:               tu.ACRVerify,
+		Nonce:             func(context.Context) string { return tu.ValidNonce },
+	}
+	tests := []struct {
+		name       string
+		oauth2Only bool
+		tokens     func() (token *oauth2.Token, want *oidc.Tokens[*oidc.IDTokenClaims])
+		wantErr    error
+	}{
+		{
+			name:       "succes, oauth2 only",
+			oauth2Only: true,
+			tokens: func() (*oauth2.Token, *oidc.Tokens[*oidc.IDTokenClaims]) {
+				accesToken, _ := tu.ValidAccessToken()
+				token := &oauth2.Token{
+					AccessToken: accesToken,
+				}
+				return token, &oidc.Tokens[*oidc.IDTokenClaims]{
+					Token: token,
+				}
+			},
+		},
+		{
+			name:       "id_token missing error",
+			oauth2Only: false,
+			tokens: func() (*oauth2.Token, *oidc.Tokens[*oidc.IDTokenClaims]) {
+				accesToken, _ := tu.ValidAccessToken()
+				token := &oauth2.Token{
+					AccessToken: accesToken,
+				}
+				return token, &oidc.Tokens[*oidc.IDTokenClaims]{
+					Token: token,
+				}
+			},
+			wantErr: ErrMissingIDToken,
+		},
+		{
+			name:       "verify tokens error",
+			oauth2Only: false,
+			tokens: func() (*oauth2.Token, *oidc.Tokens[*oidc.IDTokenClaims]) {
+				accesToken, _ := tu.ValidAccessToken()
+				token := &oauth2.Token{
+					AccessToken: accesToken,
+				}
+				token = token.WithExtra(map[string]any{
+					"id_token": "foobar",
+				})
+				return token, nil
+			},
+			wantErr: oidc.ErrParse,
+		},
+		{
+			name:       "success, with id_token",
+			oauth2Only: false,
+			tokens: func() (*oauth2.Token, *oidc.Tokens[*oidc.IDTokenClaims]) {
+				accesToken, _ := tu.ValidAccessToken()
+				token := &oauth2.Token{
+					AccessToken: accesToken,
+				}
+				idToken, claims := tu.ValidIDToken()
+				token = token.WithExtra(map[string]any{
+					"id_token": idToken,
+				})
+				return token, &oidc.Tokens[*oidc.IDTokenClaims]{
+					Token:         token,
+					IDTokenClaims: claims,
+					IDToken:       idToken,
+				}
+			},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			rp := &relyingParty{
+				oauth2Only:      tt.oauth2Only,
+				idTokenVerifier: verifier,
+			}
+			token, want := tt.tokens()
+			got, err := verifyTokenResponse[*oidc.IDTokenClaims](context.Background(), token, rp)
+			require.ErrorIs(t, err, tt.wantErr)
+			assert.Equal(t, want, got)
+		})
+	}
+}

pkg/client/rp/tockenexchange.go

@@ -0,0 +1,27 @@
+package rp
+
+import (
+	"context"
+
+	"golang.org/x/oauth2"
+
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/oidc/grants/tokenexchange"
+)
+
+// TokenExchangeRP extends the `RelyingParty` interface for the *draft* oauth2 `Token Exchange`
+type TokenExchangeRP interface {
+	RelyingParty
+
+	// TokenExchange implement the `Token Exchange Grant` exchanging some token for an other
+	TokenExchange(context.Context, *tokenexchange.TokenExchangeRequest) (*oauth2.Token, error)
+}
+
+// DelegationTokenExchangeRP extends the `TokenExchangeRP` interface
+// for the specific `delegation token` request
+type DelegationTokenExchangeRP interface {
+	TokenExchangeRP
+
+	// DelegationTokenExchange implement the `Token Exchange Grant`
+	// providing an access token in request for a `delegation` token for a given resource / audience
+	DelegationTokenExchange(context.Context, string, ...tokenexchange.TokenExchangeOption) (*oauth2.Token, error)
+}

pkg/client/rp/userinfo_example_test.go

@@ -0,0 +1,45 @@
+package rp_test
+
+import (
+	"context"
+	"fmt"
+
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/client/rp"
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/oidc"
+)
+
+type UserInfo struct {
+	Subject string `json:"sub,omitempty"`
+	oidc.UserInfoProfile
+	oidc.UserInfoEmail
+	oidc.UserInfoPhone
+	Address *oidc.UserInfoAddress `json:"address,omitempty"`
+
+	// Foo and Bar are custom claims
+	Foo string `json:"foo,omitempty"`
+	Bar struct {
+		Val1 string `json:"val_1,omitempty"`
+		Val2 string `json:"val_2,omitempty"`
+	} `json:"bar,omitempty"`
+
+	// Claims are all the combined claims, including custom.
+	Claims map[string]any `json:"-,omitempty"`
+}
+
+func (u *UserInfo) GetSubject() string {
+	return u.Subject
+}
+
+func ExampleUserinfo_custom() {
+	rpo, err := rp.NewRelyingPartyOIDC(context.TODO(), "http://localhost:8080", "clientid", "clientsecret", "http://example.com/redirect", []string{oidc.ScopeOpenID, oidc.ScopeProfile, oidc.ScopeEmail, oidc.ScopePhone})
+	if err != nil {
+		panic(err)
+	}
+
+	info, err := rp.Userinfo[*UserInfo](context.TODO(), "accesstokenstring", "Bearer", "userid", rpo)
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println(info)
+}

pkg/client/rp/verifier.go

@@ -0,0 +1,174 @@
+package rp
+
+import (
+	"context"
+	"time"
+
+	jose "github.com/go-jose/go-jose/v4"
+
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/client"
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/oidc"
+)
+
+// VerifyTokens implement the Token Response Validation as defined in OIDC specification
+// https://openid.net/specs/openid-connect-core-1_0.html#TokenResponseValidation
+func VerifyTokens[C oidc.IDClaims](ctx context.Context, accessToken, idToken string, v *IDTokenVerifier) (claims C, err error) {
+	ctx, span := client.Tracer.Start(ctx, "VerifyTokens")
+	defer span.End()
+
+	var nilClaims C
+
+	claims, err = VerifyIDToken[C](ctx, idToken, v)
+	if err != nil {
+		return nilClaims, err
+	}
+	if err := VerifyAccessToken(accessToken, claims.GetAccessTokenHash(), claims.GetSignatureAlgorithm()); err != nil {
+		return nilClaims, err
+	}
+	return claims, nil
+}
+
+// VerifyIDToken validates the id token according to
+// https://openid.net/specs/openid-connect-core-1_0.html#IDTokenValidation
+func VerifyIDToken[C oidc.Claims](ctx context.Context, token string, v *IDTokenVerifier) (claims C, err error) {
+	ctx, span := client.Tracer.Start(ctx, "VerifyIDToken")
+	defer span.End()
+
+	var nilClaims C
+
+	decrypted, err := oidc.DecryptToken(token)
+	if err != nil {
+		return nilClaims, err
+	}
+	payload, err := oidc.ParseToken(decrypted, &claims)
+	if err != nil {
+		return nilClaims, err
+	}
+
+	if err := oidc.CheckSubject(claims); err != nil {
+		return nilClaims, err
+	}
+
+	if err = oidc.CheckIssuer(claims, v.Issuer); err != nil {
+		return nilClaims, err
+	}
+
+	if err = oidc.CheckAudience(claims, v.ClientID); err != nil {
+		return nilClaims, err
+	}
+
+	if err = oidc.CheckAuthorizedParty(claims, v.ClientID); err != nil {
+		return nilClaims, err
+	}
+
+	if err = oidc.CheckSignature(ctx, decrypted, payload, claims, v.SupportedSignAlgs, v.KeySet); err != nil {
+		return nilClaims, err
+	}
+
+	if err = oidc.CheckExpiration(claims, v.Offset); err != nil {
+		return nilClaims, err
+	}
+
+	if err = oidc.CheckIssuedAt(claims, v.MaxAgeIAT, v.Offset); err != nil {
+		return nilClaims, err
+	}
+
+	if v.Nonce != nil {
+		if err = oidc.CheckNonce(claims, v.Nonce(ctx)); err != nil {
+			return nilClaims, err
+		}
+	}
+
+	if err = oidc.CheckAuthorizationContextClassReference(claims, v.ACR); err != nil {
+		return nilClaims, err
+	}
+
+	if err = oidc.CheckAuthTime(claims, v.MaxAge); err != nil {
+		return nilClaims, err
+	}
+	return claims, nil
+}
+
+type IDTokenVerifier oidc.Verifier
+
+// VerifyAccessToken validates the access token according to
+// https://openid.net/specs/openid-connect-core-1_0.html#CodeFlowTokenValidation
+func VerifyAccessToken(accessToken, atHash string, sigAlgorithm jose.SignatureAlgorithm) error {
+	if atHash == "" {
+		return nil
+	}
+
+	actual, err := oidc.ClaimHash(accessToken, sigAlgorithm)
+	if err != nil {
+		return err
+	}
+	if actual != atHash {
+		return oidc.ErrAtHash
+	}
+	return nil
+}
+
+// NewIDTokenVerifier returns a oidc.Verifier suitable for ID token verification.
+func NewIDTokenVerifier(issuer, clientID string, keySet oidc.KeySet, options ...VerifierOption) *IDTokenVerifier {
+	v := &IDTokenVerifier{
+		Issuer:   issuer,
+		ClientID: clientID,
+		KeySet:   keySet,
+		Offset:   time.Second,
+		Nonce: func(_ context.Context) string {
+			return ""
+		},
+	}
+
+	for _, opts := range options {
+		opts(v)
+	}
+
+	return v
+}
+
+// VerifierOption is the type for providing dynamic options to the IDTokenVerifier
+type VerifierOption func(*IDTokenVerifier)
+
+// WithIssuedAtOffset mitigates the risk of iat to be in the future
+// because of clock skews with the ability to add an offset to the current time
+func WithIssuedAtOffset(offset time.Duration) VerifierOption {
+	return func(v *IDTokenVerifier) {
+		v.Offset = offset
+	}
+}
+
+// WithIssuedAtMaxAge provides the ability to define the maximum duration between iat and now
+func WithIssuedAtMaxAge(maxAge time.Duration) VerifierOption {
+	return func(v *IDTokenVerifier) {
+		v.MaxAgeIAT = maxAge
+	}
+}
+
+// WithNonce sets the function to check the nonce
+func WithNonce(nonce func(context.Context) string) VerifierOption {
+	return func(v *IDTokenVerifier) {
+		v.Nonce = nonce
+	}
+}
+
+// WithACRVerifier sets the verifier for the acr claim
+func WithACRVerifier(verifier oidc.ACRVerifier) VerifierOption {
+	return func(v *IDTokenVerifier) {
+		v.ACR = verifier
+	}
+}
+
+// WithAuthTimeMaxAge provides the ability to define the maximum duration between auth_time and now
+func WithAuthTimeMaxAge(maxAge time.Duration) VerifierOption {
+	return func(v *IDTokenVerifier) {
+		v.MaxAge = maxAge
+	}
+}
+
+// WithSupportedSigningAlgorithms overwrites the default RS256 signing algorithm
+func WithSupportedSigningAlgorithms(algs ...string) VerifierOption {
+	return func(v *IDTokenVerifier) {
+		v.SupportedSignAlgs = algs
+	}
+}

pkg/client/rp/verifier_test.go

@@ -0,0 +1,359 @@
+package rp
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	tu "git.christmann.info/LARA/zitadel-oidc/v3/internal/testutil"
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/oidc"
+	jose "github.com/go-jose/go-jose/v4"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestVerifyTokens(t *testing.T) {
+	verifier := &IDTokenVerifier{
+		Issuer:            tu.ValidIssuer,
+		MaxAgeIAT:         2 * time.Minute,
+		Offset:            time.Second,
+		SupportedSignAlgs: []string{string(tu.SignatureAlgorithm)},
+		KeySet:            tu.KeySet{},
+		MaxAge:            2 * time.Minute,
+		ACR:               tu.ACRVerify,
+		Nonce:             func(context.Context) string { return tu.ValidNonce },
+		ClientID:          tu.ValidClientID,
+	}
+	accessToken, _ := tu.ValidAccessToken()
+	atHash, err := oidc.ClaimHash(accessToken, tu.SignatureAlgorithm)
+	require.NoError(t, err)
+
+	tests := []struct {
+		name          string
+		accessToken   string
+		idTokenClaims func() (string, *oidc.IDTokenClaims)
+		wantErr       bool
+	}{
+		{
+			name:          "without access token",
+			idTokenClaims: tu.ValidIDToken,
+		},
+		{
+			name:        "with access token",
+			accessToken: accessToken,
+			idTokenClaims: func() (string, *oidc.IDTokenClaims) {
+				return tu.NewIDToken(
+					tu.ValidIssuer, tu.ValidSubject, tu.ValidAudience,
+					tu.ValidExpiration, tu.ValidAuthTime, tu.ValidNonce,
+					tu.ValidACR, tu.ValidAMR, tu.ValidClientID, tu.ValidSkew, atHash,
+				)
+			},
+		},
+		{
+			name:        "expired id token",
+			accessToken: accessToken,
+			idTokenClaims: func() (string, *oidc.IDTokenClaims) {
+				return tu.NewIDToken(
+					tu.ValidIssuer, tu.ValidSubject, tu.ValidAudience,
+					tu.ValidExpiration.Add(-time.Hour), tu.ValidAuthTime, tu.ValidNonce,
+					tu.ValidACR, tu.ValidAMR, tu.ValidClientID, tu.ValidSkew, atHash,
+				)
+			},
+			wantErr: true,
+		},
+		{
+			name:        "wrong access token",
+			accessToken: accessToken,
+			idTokenClaims: func() (string, *oidc.IDTokenClaims) {
+				return tu.NewIDToken(
+					tu.ValidIssuer, tu.ValidSubject, tu.ValidAudience,
+					tu.ValidExpiration, tu.ValidAuthTime, tu.ValidNonce,
+					tu.ValidACR, tu.ValidAMR, tu.ValidClientID, tu.ValidSkew, "~~~",
+				)
+			},
+			wantErr: true,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			idToken, want := tt.idTokenClaims()
+			got, err := VerifyTokens[*oidc.IDTokenClaims](context.Background(), tt.accessToken, idToken, verifier)
+			if tt.wantErr {
+				assert.Error(t, err)
+				assert.Nil(t, got)
+				return
+			}
+			require.NoError(t, err)
+			require.NotNil(t, got)
+			assert.Equal(t, got, want)
+		})
+	}
+}
+
+func TestVerifyIDToken(t *testing.T) {
+	verifier := &IDTokenVerifier{
+		Issuer:            tu.ValidIssuer,
+		MaxAgeIAT:         2 * time.Minute,
+		Offset:            time.Second,
+		SupportedSignAlgs: []string{string(tu.SignatureAlgorithm)},
+		KeySet:            tu.KeySet{},
+		MaxAge:            2 * time.Minute,
+		ACR:               tu.ACRVerify,
+		Nonce:             func(context.Context) string { return tu.ValidNonce },
+		ClientID:          tu.ValidClientID,
+	}
+
+	tests := []struct {
+		name           string
+		tokenClaims    func() (string, *oidc.IDTokenClaims)
+		customVerifier func(verifier *IDTokenVerifier)
+		wantErr        bool
+	}{
+		{
+			name:        "success",
+			tokenClaims: tu.ValidIDToken,
+		},
+		{
+			name: "custom claims",
+			tokenClaims: func() (string, *oidc.IDTokenClaims) {
+				return tu.NewIDTokenCustom(
+					tu.ValidIssuer, tu.ValidSubject, tu.ValidAudience,
+					tu.ValidExpiration, tu.ValidAuthTime, tu.ValidNonce,
+					tu.ValidACR, tu.ValidAMR, tu.ValidClientID, tu.ValidSkew, "",
+					map[string]any{"some": "thing"},
+				)
+			},
+		},
+		{
+			name: "skip nonce check",
+			customVerifier: func(verifier *IDTokenVerifier) {
+				verifier.Nonce = nil
+			},
+			tokenClaims: func() (string, *oidc.IDTokenClaims) {
+				return tu.NewIDToken(
+					tu.ValidIssuer, tu.ValidSubject, tu.ValidAudience,
+					tu.ValidExpiration, tu.ValidAuthTime, "foo",
+					tu.ValidACR, tu.ValidAMR, tu.ValidClientID, tu.ValidSkew, "",
+				)
+			},
+		},
+		{
+			name:        "parse err",
+			tokenClaims: func() (string, *oidc.IDTokenClaims) { return "~~~~", nil },
+			wantErr:     true,
+		},
+		{
+			name:        "invalid signature",
+			tokenClaims: func() (string, *oidc.IDTokenClaims) { return tu.InvalidSignatureToken, nil },
+			wantErr:     true,
+		},
+		{
+			name: "empty subject",
+			tokenClaims: func() (string, *oidc.IDTokenClaims) {
+				return tu.NewIDToken(
+					tu.ValidIssuer, "", tu.ValidAudience,
+					tu.ValidExpiration, tu.ValidAuthTime, tu.ValidNonce,
+					tu.ValidACR, tu.ValidAMR, tu.ValidClientID, tu.ValidSkew, "",
+				)
+			},
+			wantErr: true,
+		},
+		{
+			name: "wrong issuer",
+			tokenClaims: func() (string, *oidc.IDTokenClaims) {
+				return tu.NewIDToken(
+					"foo", tu.ValidSubject, tu.ValidAudience,
+					tu.ValidExpiration, tu.ValidAuthTime, tu.ValidNonce,
+					tu.ValidACR, tu.ValidAMR, tu.ValidClientID, tu.ValidSkew, "",
+				)
+			},
+			wantErr: true,
+		},
+		{
+			name: "wrong clientID",
+			customVerifier: func(verifier *IDTokenVerifier) {
+				verifier.ClientID = "foo"
+			},
+			tokenClaims: tu.ValidIDToken,
+			wantErr:     true,
+		},
+		{
+			name: "expired",
+			tokenClaims: func() (string, *oidc.IDTokenClaims) {
+				return tu.NewIDToken(
+					tu.ValidIssuer, tu.ValidSubject, tu.ValidAudience,
+					tu.ValidExpiration.Add(-time.Hour), tu.ValidAuthTime, tu.ValidNonce,
+					tu.ValidACR, tu.ValidAMR, tu.ValidClientID, tu.ValidSkew, "",
+				)
+			},
+			wantErr: true,
+		},
+		{
+			name: "wrong IAT",
+			tokenClaims: func() (string, *oidc.IDTokenClaims) {
+				return tu.NewIDToken(
+					tu.ValidIssuer, tu.ValidSubject, tu.ValidAudience,
+					tu.ValidExpiration, tu.ValidAuthTime, tu.ValidNonce,
+					tu.ValidACR, tu.ValidAMR, tu.ValidClientID, -time.Hour, "",
+				)
+			},
+			wantErr: true,
+		},
+		{
+			name: "wrong acr",
+			tokenClaims: func() (string, *oidc.IDTokenClaims) {
+				return tu.NewIDToken(
+					tu.ValidIssuer, tu.ValidSubject, tu.ValidAudience,
+					tu.ValidExpiration, tu.ValidAuthTime, tu.ValidNonce,
+					"else", tu.ValidAMR, tu.ValidClientID, tu.ValidSkew, "",
+				)
+			},
+			wantErr: true,
+		},
+		{
+			name: "expired auth",
+			tokenClaims: func() (string, *oidc.IDTokenClaims) {
+				return tu.NewIDToken(
+					tu.ValidIssuer, tu.ValidSubject, tu.ValidAudience,
+					tu.ValidExpiration, tu.ValidAuthTime.Add(-time.Hour), tu.ValidNonce,
+					tu.ValidACR, tu.ValidAMR, tu.ValidClientID, tu.ValidSkew, "",
+				)
+			},
+			wantErr: true,
+		},
+		{
+			name: "wrong nonce",
+			tokenClaims: func() (string, *oidc.IDTokenClaims) {
+				return tu.NewIDToken(
+					tu.ValidIssuer, tu.ValidSubject, tu.ValidAudience,
+					tu.ValidExpiration, tu.ValidAuthTime, "foo",
+					tu.ValidACR, tu.ValidAMR, tu.ValidClientID, tu.ValidSkew, "",
+				)
+			},
+			wantErr: true,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			token, want := tt.tokenClaims()
+			if tt.customVerifier != nil {
+				tt.customVerifier(verifier)
+			}
+
+			got, err := VerifyIDToken[*oidc.IDTokenClaims](context.Background(), token, verifier)
+			if tt.wantErr {
+				assert.Error(t, err)
+				assert.Nil(t, got)
+				return
+			}
+			require.NoError(t, err)
+			require.NotNil(t, got)
+			assert.Equal(t, got, want)
+		})
+	}
+}
+
+func TestVerifyAccessToken(t *testing.T) {
+	token, _ := tu.ValidAccessToken()
+	hash, err := oidc.ClaimHash(token, tu.SignatureAlgorithm)
+	require.NoError(t, err)
+
+	type args struct {
+		accessToken  string
+		atHash       string
+		sigAlgorithm jose.SignatureAlgorithm
+	}
+	tests := []struct {
+		name    string
+		args    args
+		wantErr bool
+	}{
+		{
+			name: "empty hash",
+		},
+		{
+			name: "success",
+			args: args{
+				accessToken:  token,
+				atHash:       hash,
+				sigAlgorithm: tu.SignatureAlgorithm,
+			},
+		},
+		{
+			name: "invalid algorithm",
+			args: args{
+				accessToken:  token,
+				atHash:       hash,
+				sigAlgorithm: "foo",
+			},
+			wantErr: true,
+		},
+		{
+			name: "mismatch",
+			args: args{
+				accessToken:  token,
+				atHash:       "~~",
+				sigAlgorithm: tu.SignatureAlgorithm,
+			},
+			wantErr: true,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			err := VerifyAccessToken(tt.args.accessToken, tt.args.atHash, tt.args.sigAlgorithm)
+			if tt.wantErr {
+				assert.Error(t, err)
+				return
+			}
+			require.NoError(t, err)
+		})
+	}
+}
+
+func TestNewIDTokenVerifier(t *testing.T) {
+	type args struct {
+		issuer   string
+		clientID string
+		keySet   oidc.KeySet
+		options  []VerifierOption
+	}
+	tests := []struct {
+		name string
+		args args
+		want *IDTokenVerifier
+	}{
+		{
+			name: "nil nonce", // otherwise assert.Equal will fail on the function
+			args: args{
+				issuer:   tu.ValidIssuer,
+				clientID: tu.ValidClientID,
+				keySet:   tu.KeySet{},
+				options: []VerifierOption{
+					WithIssuedAtOffset(time.Minute),
+					WithIssuedAtMaxAge(time.Hour),
+					WithNonce(nil), // otherwise assert.Equal will fail on the function
+					WithACRVerifier(nil),
+					WithAuthTimeMaxAge(2 * time.Hour),
+					WithSupportedSigningAlgorithms("ABC", "DEF"),
+				},
+			},
+			want: &IDTokenVerifier{
+				Issuer:            tu.ValidIssuer,
+				Offset:            time.Minute,
+				MaxAgeIAT:         time.Hour,
+				ClientID:          tu.ValidClientID,
+				KeySet:            tu.KeySet{},
+				Nonce:             nil,
+				ACR:               nil,
+				MaxAge:            2 * time.Hour,
+				SupportedSignAlgs: []string{"ABC", "DEF"},
+			},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := NewIDTokenVerifier(tt.args.issuer, tt.args.clientID, tt.args.keySet, tt.args.options...)
+			assert.Equal(t, tt.want, got)
+		})
+	}
+}

pkg/client/rp/verifier_tokens_example_test.go

@@ -0,0 +1,86 @@
+package rp_test
+
+import (
+	"context"
+	"fmt"
+
+	tu "git.christmann.info/LARA/zitadel-oidc/v3/internal/testutil"
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/client/rp"
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/oidc"
+)
+
+// MyCustomClaims extends the TokenClaims base,
+// so it implmeents the oidc.Claims interface.
+// Instead of carrying a map, we add needed fields// to the struct for type safe access.
+type MyCustomClaims struct {
+	oidc.TokenClaims
+	NotBefore       oidc.Time `json:"nbf,omitempty"`
+	AccessTokenHash string    `json:"at_hash,omitempty"`
+	Foo             string    `json:"foo,omitempty"`
+	Bar             *Nested   `json:"bar,omitempty"`
+}
+
+// GetAccessTokenHash is required to implement
+// the oidc.IDClaims interface.
+func (c *MyCustomClaims) GetAccessTokenHash() string {
+	return c.AccessTokenHash
+}
+
+// Nested struct types are also possible.
+type Nested struct {
+	Count int      `json:"count,omitempty"`
+	Tags  []string `json:"tags,omitempty"`
+}
+
+/*
+idToken carries the following claims. foo and bar are custom claims
+
+	{
+		"acr": "something",
+		"amr": [
+			"foo",
+			"bar"
+		],
+		"at_hash": "2dzbm_vIxy-7eRtqUIGPPw",
+		"aud": [
+			"unit",
+			"test",
+			"555666"
+		],
+		"auth_time": 1678100961,
+		"azp": "555666",
+		"bar": {
+			"count": 22,
+			"tags": [
+				"some",
+				"tags"
+			]
+		},
+		"client_id": "555666",
+		"exp": 4802238682,
+		"foo": "Hello, World!",
+		"iat": 1678101021,
+		"iss": "local.com",
+		"jti": "9876",
+		"nbf": 1678101021,
+		"nonce": "12345",
+		"sub": "tim@local.com"
+	}
+*/
+const idToken = `eyJhbGciOiJSUzI1NiIsImtpZCI6IjEifQ.eyJhY3IiOiJzb21ldGhpbmciLCJhbXIiOlsiZm9vIiwiYmFyIl0sImF0X2hhc2giOiIyZHpibV92SXh5LTdlUnRxVUlHUFB3IiwiYXVkIjpbInVuaXQiLCJ0ZXN0IiwiNTU1NjY2Il0sImF1dGhfdGltZSI6MTY3ODEwMDk2MSwiYXpwIjoiNTU1NjY2IiwiYmFyIjp7ImNvdW50IjoyMiwidGFncyI6WyJzb21lIiwidGFncyJdfSwiY2xpZW50X2lkIjoiNTU1NjY2IiwiZXhwIjo0ODAyMjM4NjgyLCJmb28iOiJIZWxsbywgV29ybGQhIiwiaWF0IjoxNjc4MTAxMDIxLCJpc3MiOiJsb2NhbC5jb20iLCJqdGkiOiI5ODc2IiwibmJmIjoxNjc4MTAxMDIxLCJub25jZSI6IjEyMzQ1Iiwic3ViIjoidGltQGxvY2FsLmNvbSJ9.t3GXSfVNNwiW1Suv9_84v0sdn2_-RWHVxhphhRozDXnsO7SDNOlGnEioemXABESxSzMclM7gB7mYy5Qah2ZUNx7eP5t2njoxEYfavgHwx7UJZ2NCg8NDPQyr-hlxelEcfdXK-I0oTd-FRDvF4rqPkD9Us52IpnplChCxnHFgh4wKwPqZZjv2IXVCtn0ilKW3hff1rMOYKEuLRcN2YP0gkyuqyHvcf2dMmjod0t4sLOTJ82rsCbMBC5CLpqv3nIC9HOGITkt1Kd-Am0n1LrdZvWwTo6RFe8AnzF0gpqjcB5Wg4Qeh58DIjZOz4f_8wnmJ_gCqyRh5vfSW4XHdbum0Tw`
+const accessToken = `eyJhbGciOiJSUzI1NiIsImtpZCI6IjEifQ.eyJhdWQiOlsidW5pdCIsInRlc3QiXSwiYmFyIjp7ImNvdW50IjoyMiwidGFncyI6WyJzb21lIiwidGFncyJdfSwiZXhwIjo0ODAyMjM4NjgyLCJmb28iOiJIZWxsbywgV29ybGQhIiwiaWF0IjoxNjc4MTAxMDIxLCJpc3MiOiJsb2NhbC5jb20iLCJqdGkiOiI5ODc2IiwibmJmIjoxNjc4MTAxMDIxLCJzdWIiOiJ0aW1AbG9jYWwuY29tIn0.Zrz3LWSRjCMJZUMaI5dUbW4vGdSmEeJQ3ouhaX0bcW9rdFFLgBI4K2FWJhNivq8JDmCGSxwLu3mI680GWmDaEoAx1M5sCO9lqfIZHGZh-lfAXk27e6FPLlkTDBq8Bx4o4DJ9Fw0hRJGjUTjnYv5cq1vo2-UqldasL6CwTbkzNC_4oQFfRtuodC4Ql7dZ1HRv5LXuYx7KPkOssLZtV9cwtJp5nFzKjcf2zEE_tlbjcpynMwypornRUp1EhCWKRUGkJhJeiP71ECY5pQhShfjBu9Nc5wDpSnZmnk2S4YsPrRK3QkE-iEkas8BfsOCrGoErHjEJexAIDjasGO5PFLWfCA`
+
+func ExampleVerifyTokens_customClaims() {
+	v := rp.NewIDTokenVerifier("local.com", "555666", tu.KeySet{},
+		rp.WithNonce(func(ctx context.Context) string { return "12345" }),
+	)
+
+	// VerifyAccessToken can be called with the *MyCustomClaims.
+	claims, err := rp.VerifyTokens[*MyCustomClaims](context.TODO(), accessToken, idToken, v)
+	if err != nil {
+		panic(err)
+	}
+	// Here we have typesafe access to the custom claims
+	fmt.Println(claims.Foo, claims.Bar.Count, claims.Bar.Tags)
+	// Output: Hello, World! 22 [some tags]
+}

pkg/client/rs/introspect_example_test.go

@@ -0,0 +1,52 @@
+package rs_test
+
+import (
+	"context"
+	"fmt"
+
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/client/rs"
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/oidc"
+)
+
+type IntrospectionResponse struct {
+	Active     bool                     `json:"active"`
+	Scope      oidc.SpaceDelimitedArray `json:"scope,omitempty"`
+	ClientID   string                   `json:"client_id,omitempty"`
+	TokenType  string                   `json:"token_type,omitempty"`
+	Expiration oidc.Time                `json:"exp,omitempty"`
+	IssuedAt   oidc.Time                `json:"iat,omitempty"`
+	NotBefore  oidc.Time                `json:"nbf,omitempty"`
+	Subject    string                   `json:"sub,omitempty"`
+	Audience   oidc.Audience            `json:"aud,omitempty"`
+	Issuer     string                   `json:"iss,omitempty"`
+	JWTID      string                   `json:"jti,omitempty"`
+	Username   string                   `json:"username,omitempty"`
+	oidc.UserInfoProfile
+	oidc.UserInfoEmail
+	oidc.UserInfoPhone
+	Address *oidc.UserInfoAddress `json:"address,omitempty"`
+
+	// Foo and Bar are custom claims
+	Foo string `json:"foo,omitempty"`
+	Bar struct {
+		Val1 string `json:"val_1,omitempty"`
+		Val2 string `json:"val_2,omitempty"`
+	} `json:"bar,omitempty"`
+
+	// Claims are all the combined claims, including custom.
+	Claims map[string]any `json:"-,omitempty"`
+}
+
+func ExampleIntrospect_custom() {
+	rss, err := rs.NewResourceServerClientCredentials(context.TODO(), "http://localhost:8080", "clientid", "clientsecret")
+	if err != nil {
+		panic(err)
+	}
+
+	resp, err := rs.Introspect[*IntrospectionResponse](context.TODO(), rss, "accesstokenstring")
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println(resp)
+}

pkg/client/rs/resource_server.go

@@ -0,0 +1,145 @@
+package rs
+
+import (
+	"context"
+	"errors"
+	"net/http"
+	"time"
+
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/client"
+	httphelper "git.christmann.info/LARA/zitadel-oidc/v3/pkg/http"
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/oidc"
+)
+
+type ResourceServer interface {
+	IntrospectionURL() string
+	TokenEndpoint() string
+	HttpClient() *http.Client
+	AuthFn() (any, error)
+}
+
+type resourceServer struct {
+	issuer        string
+	tokenURL      string
+	introspectURL string
+	httpClient    *http.Client
+	authFn        func() (any, error)
+}
+
+func (r *resourceServer) IntrospectionURL() string {
+	return r.introspectURL
+}
+
+func (r *resourceServer) TokenEndpoint() string {
+	return r.tokenURL
+}
+
+func (r *resourceServer) HttpClient() *http.Client {
+	return r.httpClient
+}
+
+func (r *resourceServer) AuthFn() (any, error) {
+	return r.authFn()
+}
+
+func NewResourceServerClientCredentials(ctx context.Context, issuer, clientID, clientSecret string, option ...Option) (ResourceServer, error) {
+	authorizer := func() (any, error) {
+		return httphelper.AuthorizeBasic(clientID, clientSecret), nil
+	}
+	return newResourceServer(ctx, issuer, authorizer, option...)
+}
+
+func NewResourceServerJWTProfile(ctx context.Context, issuer, clientID, keyID string, key []byte, options ...Option) (ResourceServer, error) {
+	signer, err := client.NewSignerFromPrivateKeyByte(key, keyID)
+	if err != nil {
+		return nil, err
+	}
+	authorizer := func() (any, error) {
+		assertion, err := client.SignedJWTProfileAssertion(clientID, []string{issuer}, time.Hour, signer)
+		if err != nil {
+			return nil, err
+		}
+		return client.ClientAssertionFormAuthorization(assertion), nil
+	}
+	return newResourceServer(ctx, issuer, authorizer, options...)
+}
+
+func newResourceServer(ctx context.Context, issuer string, authorizer func() (any, error), options ...Option) (*resourceServer, error) {
+	rs := &resourceServer{
+		issuer:     issuer,
+		httpClient: httphelper.DefaultHTTPClient,
+	}
+	for _, optFunc := range options {
+		optFunc(rs)
+	}
+	if rs.introspectURL == "" || rs.tokenURL == "" {
+		config, err := client.Discover(ctx, rs.issuer, rs.httpClient)
+		if err != nil {
+			return nil, err
+		}
+		if rs.tokenURL == "" {
+			rs.tokenURL = config.TokenEndpoint
+		}
+		if rs.introspectURL == "" {
+			rs.introspectURL = config.IntrospectionEndpoint
+		}
+	}
+	if rs.tokenURL == "" {
+		return nil, errors.New("tokenURL is empty: please provide with either `WithStaticEndpoints` or a discovery url")
+	}
+	rs.authFn = authorizer
+	return rs, nil
+}
+
+func NewResourceServerFromKeyFile(ctx context.Context, issuer, path string, options ...Option) (ResourceServer, error) {
+	c, err := client.ConfigFromKeyFile(path)
+	if err != nil {
+		return nil, err
+	}
+	return NewResourceServerJWTProfile(ctx, issuer, c.ClientID, c.KeyID, []byte(c.Key), options...)
+}
+
+type Option func(*resourceServer)
+
+// WithClient provides the ability to set an http client to be used for the resource server
+func WithClient(client *http.Client) Option {
+	return func(server *resourceServer) {
+		server.httpClient = client
+	}
+}
+
+// WithStaticEndpoints provides the ability to set static token and introspect URL
+func WithStaticEndpoints(tokenURL, introspectURL string) Option {
+	return func(server *resourceServer) {
+		server.tokenURL = tokenURL
+		server.introspectURL = introspectURL
+	}
+}
+
+// Introspect calls the [RFC7662] Token Introspection
+// endpoint and returns the response in an instance of type R.
+// [*oidc.IntrospectionResponse] can be used as a good example, or use a custom type if type-safe
+// access to custom claims is needed.
+//
+// [RFC7662]: https://www.rfc-editor.org/rfc/rfc7662
+func Introspect[R any](ctx context.Context, rp ResourceServer, token string) (resp R, err error) {
+	ctx, span := client.Tracer.Start(ctx, "Introspect")
+	defer span.End()
+
+	if rp.IntrospectionURL() == "" {
+		return resp, errors.New("resource server: introspection URL is empty")
+	}
+	authFn, err := rp.AuthFn()
+	if err != nil {
+		return resp, err
+	}
+	req, err := httphelper.FormRequest(ctx, rp.IntrospectionURL(), &oidc.IntrospectionRequest{Token: token}, client.Encoder, authFn)
+	if err != nil {
+		return resp, err
+	}
+
+	if err := httphelper.HttpRequest(rp.HttpClient(), req, &resp); err != nil {
+		return resp, err
+	}
+	return resp, nil
+}

pkg/client/rs/resource_server_test.go

@@ -0,0 +1,221 @@
+package rs
+
+import (
+	"context"
+	"testing"
+
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/oidc"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestNewResourceServer(t *testing.T) {
+	type args struct {
+		issuer     string
+		authorizer func() (any, error)
+		options    []Option
+	}
+	type wantFields struct {
+		issuer        string
+		tokenURL      string
+		introspectURL string
+		authFn        func() (any, error)
+	}
+	tests := []struct {
+		name       string
+		args       args
+		wantFields *wantFields
+		wantErr    bool
+	}{
+		{
+			name: "spotify-full-discovery",
+			args: args{
+				issuer:     "https://accounts.spotify.com",
+				authorizer: nil,
+				options:    []Option{},
+			},
+			wantFields: &wantFields{
+				issuer:        "https://accounts.spotify.com",
+				tokenURL:      "https://accounts.spotify.com/api/token",
+				introspectURL: "",
+				authFn:        nil,
+			},
+			wantErr: false,
+		},
+		{
+			name: "spotify-with-static-tokenurl",
+			args: args{
+				issuer:     "https://accounts.spotify.com",
+				authorizer: nil,
+				options: []Option{
+					WithStaticEndpoints(
+						"https://some.host/token-url",
+						"",
+					),
+				},
+			},
+			wantFields: &wantFields{
+				issuer:        "https://accounts.spotify.com",
+				tokenURL:      "https://some.host/token-url",
+				introspectURL: "",
+				authFn:        nil,
+			},
+			wantErr: false,
+		},
+		{
+			name: "spotify-with-static-introspecturl",
+			args: args{
+				issuer:     "https://accounts.spotify.com",
+				authorizer: nil,
+				options: []Option{
+					WithStaticEndpoints(
+						"",
+						"https://some.host/instrospect-url",
+					),
+				},
+			},
+			wantFields: &wantFields{
+				issuer:        "https://accounts.spotify.com",
+				tokenURL:      "https://accounts.spotify.com/api/token",
+				introspectURL: "https://some.host/instrospect-url",
+				authFn:        nil,
+			},
+			wantErr: false,
+		},
+		{
+			name: "spotify-with-all-static-endpoints",
+			args: args{
+				issuer:     "https://accounts.spotify.com",
+				authorizer: nil,
+				options: []Option{
+					WithStaticEndpoints(
+						"https://some.host/token-url",
+						"https://some.host/instrospect-url",
+					),
+				},
+			},
+			wantFields: &wantFields{
+				issuer:        "https://accounts.spotify.com",
+				tokenURL:      "https://some.host/token-url",
+				introspectURL: "https://some.host/instrospect-url",
+				authFn:        nil,
+			},
+			wantErr: false,
+		},
+		{
+			name: "bad-discovery",
+			args: args{
+				issuer:     "https://127.0.0.1:65535",
+				authorizer: nil,
+				options:    []Option{},
+			},
+			wantFields: nil,
+			wantErr:    true,
+		},
+		{
+			name: "bad-discovery-with-static-tokenurl",
+			args: args{
+				issuer:     "https://127.0.0.1:65535",
+				authorizer: nil,
+				options: []Option{
+					WithStaticEndpoints(
+						"https://some.host/token-url",
+						"",
+					),
+				},
+			},
+			wantFields: nil,
+			wantErr:    true,
+		},
+		{
+			name: "bad-discovery-with-static-introspecturl",
+			args: args{
+				issuer:     "https://127.0.0.1:65535",
+				authorizer: nil,
+				options: []Option{
+					WithStaticEndpoints(
+						"",
+						"https://some.host/instrospect-url",
+					),
+				},
+			},
+			wantFields: nil,
+			wantErr:    true,
+		},
+		{
+			name: "bad-discovery-with-all-static-endpoints",
+			args: args{
+				issuer:     "https://127.0.0.1:65535",
+				authorizer: nil,
+				options: []Option{
+					WithStaticEndpoints(
+						"https://some.host/token-url",
+						"https://some.host/instrospect-url",
+					),
+				},
+			},
+			wantFields: &wantFields{
+				issuer:        "https://127.0.0.1:65535",
+				tokenURL:      "https://some.host/token-url",
+				introspectURL: "https://some.host/instrospect-url",
+				authFn:        nil,
+			},
+			wantErr: false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, err := newResourceServer(context.Background(), tt.args.issuer, tt.args.authorizer, tt.args.options...)
+			if tt.wantErr {
+				assert.Error(t, err)
+				return
+			}
+			require.NoError(t, err)
+			if tt.wantFields == nil {
+				return
+			}
+			assert.Equal(t, tt.wantFields.issuer, got.issuer)
+			assert.Equal(t, tt.wantFields.tokenURL, got.tokenURL)
+			assert.Equal(t, tt.wantFields.introspectURL, got.introspectURL)
+		})
+	}
+}
+
+func TestIntrospect(t *testing.T) {
+	type args struct {
+		ctx   context.Context
+		rp    ResourceServer
+		token string
+	}
+	rp, err := newResourceServer(
+		context.Background(),
+		"https://accounts.spotify.com",
+		nil,
+	)
+	require.NoError(t, err)
+	tests := []struct {
+		name    string
+		args    args
+		wantErr bool
+	}{
+		{
+			name: "missing-introspect-url",
+			args: args{
+				ctx:   context.Background(),
+				rp:    rp,
+				token: "my-token",
+			},
+			wantErr: true,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			_, err := Introspect[*oidc.IntrospectionResponse](tt.args.ctx, tt.args.rp, tt.args.token)
+			if tt.wantErr {
+				assert.Error(t, err)
+				return
+			}
+			require.NoError(t, err)
+		})
+	}
+}

pkg/client/tokenexchange/tokenexchange.go

@@ -0,0 +1,145 @@
+package tokenexchange
+
+import (
+	"context"
+	"errors"
+	"net/http"
+	"time"
+
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/client"
+	httphelper "git.christmann.info/LARA/zitadel-oidc/v3/pkg/http"
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/oidc"
+	"github.com/go-jose/go-jose/v4"
+)
+
+type TokenExchanger interface {
+	TokenEndpoint() string
+	HttpClient() *http.Client
+	AuthFn() (any, error)
+}
+
+type OAuthTokenExchange struct {
+	httpClient    *http.Client
+	tokenEndpoint string
+	authFn        func() (any, error)
+}
+
+func NewTokenExchanger(ctx context.Context, issuer string, options ...func(source *OAuthTokenExchange)) (TokenExchanger, error) {
+	return newOAuthTokenExchange(ctx, issuer, nil, options...)
+}
+
+func NewTokenExchangerClientCredentials(ctx context.Context, issuer, clientID, clientSecret string, options ...func(source *OAuthTokenExchange)) (TokenExchanger, error) {
+	authorizer := func() (any, error) {
+		return httphelper.AuthorizeBasic(clientID, clientSecret), nil
+	}
+	return newOAuthTokenExchange(ctx, issuer, authorizer, options...)
+}
+
+func NewTokenExchangerJWTProfile(ctx context.Context, issuer, clientID string, signer jose.Signer, options ...func(source *OAuthTokenExchange)) (TokenExchanger, error) {
+	authorizer := func() (any, error) {
+		assertion, err := client.SignedJWTProfileAssertion(clientID, []string{issuer}, time.Hour, signer)
+		if err != nil {
+			return nil, err
+		}
+		return client.ClientAssertionFormAuthorization(assertion), nil
+	}
+	return newOAuthTokenExchange(ctx, issuer, authorizer, options...)
+}
+
+func newOAuthTokenExchange(ctx context.Context, issuer string, authorizer func() (any, error), options ...func(source *OAuthTokenExchange)) (*OAuthTokenExchange, error) {
+	te := &OAuthTokenExchange{
+		httpClient: httphelper.DefaultHTTPClient,
+	}
+	for _, opt := range options {
+		opt(te)
+	}
+
+	if te.tokenEndpoint == "" {
+		config, err := client.Discover(ctx, issuer, te.httpClient)
+		if err != nil {
+			return nil, err
+		}
+
+		te.tokenEndpoint = config.TokenEndpoint
+	}
+
+	if te.tokenEndpoint == "" {
+		return nil, errors.New("tokenURL is empty: please provide with either `WithStaticTokenEndpoint` or a discovery url")
+	}
+
+	te.authFn = authorizer
+
+	return te, nil
+}
+
+func WithHTTPClient(client *http.Client) func(*OAuthTokenExchange) {
+	return func(source *OAuthTokenExchange) {
+		source.httpClient = client
+	}
+}
+
+func WithStaticTokenEndpoint(issuer, tokenEndpoint string) func(*OAuthTokenExchange) {
+	return func(source *OAuthTokenExchange) {
+		source.tokenEndpoint = tokenEndpoint
+	}
+}
+
+func (te *OAuthTokenExchange) TokenEndpoint() string {
+	return te.tokenEndpoint
+}
+
+func (te *OAuthTokenExchange) HttpClient() *http.Client {
+	return te.httpClient
+}
+
+func (te *OAuthTokenExchange) AuthFn() (any, error) {
+	if te.authFn != nil {
+		return te.authFn()
+	}
+
+	return nil, nil
+}
+
+// ExchangeToken sends a token exchange request (rfc 8693) to te's token endpoint.
+// SubjectToken and SubjectTokenType are required parameters.
+func ExchangeToken(
+	ctx context.Context,
+	te TokenExchanger,
+	SubjectToken string,
+	SubjectTokenType oidc.TokenType,
+	ActorToken string,
+	ActorTokenType oidc.TokenType,
+	Resource []string,
+	Audience []string,
+	Scopes []string,
+	RequestedTokenType oidc.TokenType,
+) (*oidc.TokenExchangeResponse, error) {
+	ctx, span := client.Tracer.Start(ctx, "ExchangeToken")
+	defer span.End()
+
+	if SubjectToken == "" {
+		return nil, errors.New("empty subject_token")
+	}
+	if SubjectTokenType == "" {
+		return nil, errors.New("empty subject_token_type")
+	}
+
+	authFn, err := te.AuthFn()
+	if err != nil {
+		return nil, err
+	}
+
+	request := oidc.TokenExchangeRequest{
+		GrantType:          oidc.GrantTypeTokenExchange,
+		SubjectToken:       SubjectToken,
+		SubjectTokenType:   SubjectTokenType,
+		ActorToken:         ActorToken,
+		ActorTokenType:     ActorTokenType,
+		Resource:           Resource,
+		Audience:           Audience,
+		Scopes:             Scopes,
+		RequestedTokenType: RequestedTokenType,
+	}
+
+	return client.CallTokenExchangeEndpoint(ctx, request, authFn, te)
+}

pkg/crypto/crypto.go

@@ -1,4 +1,4 @@
-package utils
+package crypto
 
 import (
 	"crypto/aes"
@@ -9,13 +9,15 @@ import (
 	"io"
 )
 
+var ErrCipherTextBlockSize = errors.New("ciphertext block size is too short")
+
 func EncryptAES(data string, key string) (string, error) {
 	encrypted, err := EncryptBytesAES([]byte(data), key)
 	if err != nil {
 		return "", err
 	}
 
-	return base64.URLEncoding.EncodeToString(encrypted), nil
+	return base64.RawURLEncoding.EncodeToString(encrypted), nil
 }
 
 func EncryptBytesAES(plainText []byte, key string) ([]byte, error) {
@@ -37,7 +39,7 @@ func EncryptBytesAES(plainText []byte, key string) ([]byte, error) {
 }
 
 func DecryptAES(data string, key string) (string, error) {
-	text, err := base64.URLEncoding.DecodeString(data)
+	text, err := base64.RawURLEncoding.DecodeString(data)
 	if err != nil {
 		return "", err
 	}
@@ -55,8 +57,7 @@ func DecryptBytesAES(cipherText []byte, key string) ([]byte, error) {
 	}
 
 	if len(cipherText) < aes.BlockSize {
-		err = errors.New("Ciphertext block size is too short!")
-		return nil, err
+		return nil, ErrCipherTextBlockSize
 	}
 	iv := cipherText[:aes.BlockSize]
 	cipherText = cipherText[aes.BlockSize:]

pkg/crypto/hash.go

@@ -0,0 +1,49 @@
+package crypto
+
+import (
+	"crypto/sha256"
+	"crypto/sha512"
+	"encoding/base64"
+	"errors"
+	"fmt"
+	"hash"
+
+	jose "github.com/go-jose/go-jose/v4"
+)
+
+var ErrUnsupportedAlgorithm = errors.New("unsupported signing algorithm")
+
+func GetHashAlgorithm(sigAlgorithm jose.SignatureAlgorithm) (hash.Hash, error) {
+	switch sigAlgorithm {
+	case jose.RS256, jose.ES256, jose.PS256:
+		return sha256.New(), nil
+	case jose.RS384, jose.ES384, jose.PS384:
+		return sha512.New384(), nil
+	case jose.RS512, jose.ES512, jose.PS512:
+		return sha512.New(), nil
+
+	// There is no published spec for this yet, but we have confirmation it will get published.
+	// There is consensus here: https://bitbucket.org/openid/connect/issues/1125/_hash-algorithm-for-eddsa-id-tokens
+	// Currently Go and go-jose only supports the ed25519 curve key for EdDSA, so we can safely assume sha512 here.
+	// It is unlikely ed448 will ever be supported: https://github.com/golang/go/issues/29390
+	case jose.EdDSA:
+		return sha512.New(), nil
+
+	default:
+		return nil, fmt.Errorf("%w: %q", ErrUnsupportedAlgorithm, sigAlgorithm)
+	}
+}
+
+func HashString(hash hash.Hash, s string, firstHalf bool) string {
+	if hash == nil {
+		return s
+	}
+	//nolint:errcheck
+	hash.Write([]byte(s))
+	size := hash.Size()
+	if firstHalf {
+		size = size / 2
+	}
+	sum := hash.Sum(nil)[:size]
+	return base64.RawURLEncoding.EncodeToString(sum)
+}

pkg/crypto/key.go

@@ -0,0 +1,45 @@
+package crypto
+
+import (
+	"crypto"
+	"crypto/ecdsa"
+	"crypto/ed25519"
+	"crypto/rsa"
+	"crypto/x509"
+	"encoding/pem"
+	"errors"
+
+	"github.com/go-jose/go-jose/v4"
+)
+
+var (
+	ErrPEMDecode             = errors.New("PEM decode failed")
+	ErrUnsupportedFormat     = errors.New("key is neither in PKCS#1 nor PKCS#8 format")
+	ErrUnsupportedPrivateKey = errors.New("unsupported key type, must be RSA, ECDSA or ED25519 private key")
+)
+
+func BytesToPrivateKey(b []byte) (crypto.PublicKey, jose.SignatureAlgorithm, error) {
+	block, _ := pem.Decode(b)
+	if block == nil {
+		return nil, "", ErrPEMDecode
+	}
+
+	privateKey, err := x509.ParsePKCS1PrivateKey(block.Bytes)
+	if err == nil {
+		return privateKey, jose.RS256, nil
+	}
+	key, err := x509.ParsePKCS8PrivateKey(block.Bytes)
+	if err != nil {
+		return nil, "", ErrUnsupportedFormat
+	}
+	switch privateKey := key.(type) {
+	case *rsa.PrivateKey:
+		return privateKey, jose.RS256, nil
+	case ed25519.PrivateKey:
+		return privateKey, jose.EdDSA, nil
+	case *ecdsa.PrivateKey:
+		return privateKey, jose.ES256, nil
+	default:
+		return nil, "", ErrUnsupportedPrivateKey
+	}
+}

pkg/crypto/key_test.go

@@ -0,0 +1,134 @@
+package crypto_test
+
+import (
+	"crypto"
+	"crypto/ecdsa"
+	"crypto/ed25519"
+	"crypto/rsa"
+	"testing"
+
+	"github.com/go-jose/go-jose/v4"
+	"github.com/stretchr/testify/assert"
+
+	zcrypto "git.christmann.info/LARA/zitadel-oidc/v3/pkg/crypto"
+)
+
+func TestBytesToPrivateKey(t *testing.T) {
+	type args struct {
+		key []byte
+	}
+	type want struct {
+		key       crypto.Signer
+		algorithm jose.SignatureAlgorithm
+		err       error
+	}
+	tests := []struct {
+		name string
+		args args
+		want want
+	}{
+		{
+			name: "PEMDecodeError",
+			args: args{
+				key: []byte("The non-PEM sequence"),
+			},
+			want: want{
+				err: zcrypto.ErrPEMDecode,
+			},
+		},
+		{
+			name: "PKCS#1 RSA",
+			args: args{
+				key: []byte(`-----BEGIN RSA PRIVATE KEY-----
+MIIBOgIBAAJBAKj34GkxFhD90vcNLYLInFEX6Ppy1tPf9Cnzj4p4WGeKLs1Pt8Qu
+KUpRKfFLfRYC9AIKjbJTWit+CqvjWYzvQwECAwEAAQJAIJLixBy2qpFoS4DSmoEm
+o3qGy0t6z09AIJtH+5OeRV1be+N4cDYJKffGzDa88vQENZiRm0GRq6a+HPGQMd2k
+TQIhAKMSvzIBnni7ot/OSie2TmJLY4SwTQAevXysE2RbFDYdAiEBCUEaRQnMnbp7
+9mxDXDf6AU0cN/RPBjb9qSHDcWZHGzUCIG2Es59z8ugGrDY+pxLQnwfotadxd+Uy
+v/Ow5T0q5gIJAiEAyS4RaI9YG8EWx/2w0T67ZUVAw8eOMB6BIUg0Xcu+3okCIBOs
+/5OiPgoTdSy7bcF9IGpSE8ZgGKzgYQVZeN97YE00
+-----END RSA PRIVATE KEY-----`),
+			},
+			want: want{
+				key:       &rsa.PrivateKey{},
+				algorithm: jose.RS256,
+				err:       nil,
+			},
+		},
+		{
+			name: "PKCS#8 RSA",
+			args: args{
+				key: []byte(`-----BEGIN PRIVATE KEY-----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+-----END PRIVATE KEY-----`),
+			},
+			want: want{
+				key:       &rsa.PrivateKey{},
+				algorithm: jose.RS256,
+				err:       nil,
+			},
+		},
+		{
+			name: "PKCS#8 ECDSA",
+			args: args{
+				key: []byte(`-----BEGIN PRIVATE KEY-----
+MIGHAgEAMBMGByqGSM49AgEGCCqGSM49AwEHBG0wawIBAQQgwwOZSU4GlP7ps/Wp
+V6o0qRwxultdfYo/uUuj48QZjSuhRANCAATMiI2Han+ABKmrk5CNlxRAGC61w4d3
+G4TAeuBpyzqJ7x/6NjCxoQzJzZHtNjIfjVATI59XFZWF59GhtSZbShAr
+-----END PRIVATE KEY-----`),
+			},
+			want: want{
+				key:       &ecdsa.PrivateKey{},
+				algorithm: jose.ES256,
+				err:       nil,
+			},
+		},
+		{
+			name: "PKCS#8 ED25519",
+			args: args{
+				key: []byte(`-----BEGIN PRIVATE KEY-----
+MC4CAQAwBQYDK2VwBCIEIHu6ZtDsjjauMasBxnS9Fg87UJwKfcT/oiq6S0ktbky8
+-----END PRIVATE KEY-----`),
+			},
+			want: want{
+				key:       ed25519.PrivateKey{},
+				algorithm: jose.EdDSA,
+				err:       nil,
+			},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			key, algorithm, err := zcrypto.BytesToPrivateKey(tt.args.key)
+			assert.IsType(t, tt.want.key, key)
+			assert.Equal(t, tt.want.algorithm, algorithm)
+			assert.ErrorIs(t, tt.want.err, err)
+		})
+
+	}
+}

pkg/crypto/sign.go

@@ -1,12 +1,13 @@
-package utils
+package crypto
 
 import (
 	"encoding/json"
+	"errors"
 
-	"gopkg.in/square/go-jose.v2"
+	jose "github.com/go-jose/go-jose/v4"
 )
 
-func Sign(object interface{}, signer jose.Signer) (string, error) {
+func Sign(object any, signer jose.Signer) (string, error) {
 	payload, err := json.Marshal(object)
 	if err != nil {
 		return "", err
@@ -15,6 +16,9 @@ func Sign(object interface{}, signer jose.Signer) (string, error) {
 }
 
 func SignPayload(payload []byte, signer jose.Signer) (string, error) {
+	if signer == nil {
+		return "", errors.New("missing signer")
+	}
 	result, err := signer.Sign(payload)
 	if err != nil {
 		return "", err

pkg/http/cookie.go

@@ -1,4 +1,4 @@
-package utils
+package http
 
 import (
 	"errors"
@@ -13,6 +13,7 @@ type CookieHandler struct {
 	sameSite     http.SameSite
 	maxAge       int
 	domain       string
+	path         string
 }
 
 func NewCookieHandler(hashKey, encryptKey []byte, opts ...CookieHandlerOpt) *CookieHandler {
@@ -20,6 +21,7 @@ func NewCookieHandler(hashKey, encryptKey []byte, opts ...CookieHandlerOpt) *Coo
 		securecookie: securecookie.New(hashKey, encryptKey),
 		secureOnly:   true,
 		sameSite:     http.SameSiteLaxMode,
+		path:         "/",
 	}
 
 	for _, opt := range opts {
@@ -55,6 +57,12 @@ func WithDomain(domain string) CookieHandlerOpt {
 	}
 }
 
+func WithPath(path string) CookieHandlerOpt {
+	return func(c *CookieHandler) {
+		c.path = path
+	}
+}
+
 func (c *CookieHandler) CheckCookie(r *http.Request, name string) (string, error) {
 	cookie, err := r.Cookie(name)
 	if err != nil {
@@ -87,7 +95,7 @@ func (c *CookieHandler) SetCookie(w http.ResponseWriter, name, value string) err
 		Name:     name,
 		Value:    encoded,
 		Domain:   c.domain,
-		Path:     "/",
+		Path:     c.path,
 		MaxAge:   c.maxAge,
 		HttpOnly: true,
 		Secure:   c.secureOnly,
@@ -101,7 +109,7 @@ func (c *CookieHandler) DeleteCookie(w http.ResponseWriter, name string) {
 		Name:     name,
 		Value:    "",
 		Domain:   c.domain,
-		Path:     "/",
+		Path:     c.path,
 		MaxAge:   -1,
 		HttpOnly: true,
 		Secure:   c.secureOnly,

pkg/http/http.go

@@ -1,28 +1,29 @@
-package utils
+package http
 
 import (
 	"context"
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"log"
 	"net/http"
 	"net/url"
 	"strings"
 	"time"
+
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/oidc"
 )
 
-var (
-	DefaultHTTPClient = &http.Client{
-		Timeout: time.Duration(30 * time.Second),
-	}
-)
+var DefaultHTTPClient = &http.Client{
+	Timeout: 30 * time.Second,
+}
 
 type Decoder interface {
-	Decode(dst interface{}, src map[string][]string) error
+	Decode(dst any, src map[string][]string) error
 }
+
 type Encoder interface {
-	Encode(src interface{}, dst map[string][]string) error
+	Encode(src any, dst map[string][]string) error
 }
 
 type FormAuthorization func(url.Values)
@@ -30,11 +31,11 @@ type RequestAuthorization func(*http.Request)
 
 func AuthorizeBasic(user, password string) RequestAuthorization {
 	return func(req *http.Request) {
-		req.SetBasicAuth(user, password)
+		req.SetBasicAuth(url.QueryEscape(user), url.QueryEscape(password))
 	}
 }
 
-func FormRequest(endpoint string, request interface{}, encoder Encoder, authFn interface{}) (*http.Request, error) {
+func FormRequest(ctx context.Context, endpoint string, request any, encoder Encoder, authFn any) (*http.Request, error) {
 	form := url.Values{}
 	if err := encoder.Encode(request, form); err != nil {
 		return nil, err
@@ -43,7 +44,7 @@ func FormRequest(endpoint string, request interface{}, encoder Encoder, authFn i
 		fn(form)
 	}
 	body := strings.NewReader(form.Encode())
-	req, err := http.NewRequest("POST", endpoint, body)
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, endpoint, body)
 	if err != nil {
 		return nil, err
 	}
@@ -54,20 +55,25 @@ func FormRequest(endpoint string, request interface{}, encoder Encoder, authFn i
 	return req, nil
 }
 
-func HttpRequest(client *http.Client, req *http.Request, response interface{}) error {
+func HttpRequest(client *http.Client, req *http.Request, response any) error {
 	resp, err := client.Do(req)
 	if err != nil {
 		return err
 	}
 	defer resp.Body.Close()
 
-	body, err := ioutil.ReadAll(resp.Body)
+	body, err := io.ReadAll(resp.Body)
 	if err != nil {
 		return fmt.Errorf("unable to read response body: %v", err)
 	}
 
 	if resp.StatusCode != http.StatusOK {
-		return fmt.Errorf("http status not ok: %s %s", resp.Status, body)
+		var oidcErr oidc.Error
+		err = json.Unmarshal(body, &oidcErr)
+		if err != nil || oidcErr.ErrorType == "" {
+			return fmt.Errorf("http status not ok: %s %s", resp.Status, body)
+		}
+		return &oidcErr
 	}
 
 	err = json.Unmarshal(body, response)
@@ -77,14 +83,13 @@ func HttpRequest(client *http.Client, req *http.Request, response interface{}) e
 	return nil
 }
 
-func URLEncodeResponse(resp interface{}, encoder Encoder) (string, error) {
+func URLEncodeParams(resp any, encoder Encoder) (url.Values, error) {
 	values := make(map[string][]string)
 	err := encoder.Encode(resp, values)
 	if err != nil {
-		return "", err
+		return nil, err
 	}
-	v := url.Values(values)
-	return v.Encode(), nil
+	return values, nil
 }
 
 func StartServer(ctx context.Context, port string) {
@@ -97,7 +102,11 @@ func StartServer(ctx context.Context, port string) {
 
 	go func() {
 		<-ctx.Done()
-		err := server.Shutdown(ctx)
-		log.Fatalf("Shutdown(): %v", err)
+		ctxShutdown, cancelShutdown := context.WithTimeout(context.Background(), 5*time.Second)
+		defer cancelShutdown()
+		err := server.Shutdown(ctxShutdown)
+		if err != nil {
+			log.Fatalf("Shutdown(): %v", err)
+		}
 	}()
 }

pkg/http/marshal.go

@@ -1,24 +1,26 @@
-package utils
+package http
 
 import (
 	"bytes"
 	"encoding/json"
 	"fmt"
 	"net/http"
-
-	"github.com/sirupsen/logrus"
+	"reflect"
 )
 
-func MarshalJSON(w http.ResponseWriter, i interface{}) {
-	b, err := json.Marshal(i)
-	if err != nil {
-		http.Error(w, err.Error(), http.StatusInternalServerError)
+func MarshalJSON(w http.ResponseWriter, i any) {
+	MarshalJSONWithStatus(w, i, http.StatusOK)
+}
+
+func MarshalJSONWithStatus(w http.ResponseWriter, i any, status int) {
+	w.Header().Set("content-type", "application/json")
+	w.WriteHeader(status)
+	if i == nil || (reflect.ValueOf(i).Kind() == reflect.Ptr && reflect.ValueOf(i).IsNil()) {
 		return
 	}
-	w.Header().Set("content-type", "application/json")
-	_, err = w.Write(b)
+	err := json.NewEncoder(w).Encode(i)
 	if err != nil {
-		logrus.Error("error writing response")
+		http.Error(w, err.Error(), http.StatusInternalServerError)
 	}
 }
 
@@ -29,6 +31,14 @@ func ConcatenateJSON(first, second []byte) ([]byte, error) {
 	if !bytes.HasPrefix(second, []byte{'{'}) {
 		return nil, fmt.Errorf("jws: invalid JSON %s", second)
 	}
+	// check empty
+	if len(first) == 2 {
+		return second, nil
+	}
+	if len(second) == 2 {
+		return first, nil
+	}
+
 	first[len(first)-1] = ','
 	first = append(first, second[1:]...)
 	return first, nil

pkg/http/marshal_test.go

@@ -0,0 +1,156 @@
+package http
+
+import (
+	"bytes"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestConcatenateJSON(t *testing.T) {
+	type args struct {
+		first  []byte
+		second []byte
+	}
+	tests := []struct {
+		name    string
+		args    args
+		want    []byte
+		wantErr bool
+	}{
+		{
+			"invalid first part, error",
+			args{
+				[]byte(`invalid`),
+				[]byte(`{"some": "thing"}`),
+			},
+			nil,
+			true,
+		},
+		{
+			"invalid second part, error",
+			args{
+				[]byte(`{"some": "thing"}`),
+				[]byte(`invalid`),
+			},
+			nil,
+			true,
+		},
+		{
+			"both valid, merged",
+			args{
+				[]byte(`{"some": "thing"}`),
+				[]byte(`{"another": "thing"}`),
+			},
+
+			[]byte(`{"some": "thing","another": "thing"}`),
+			false,
+		},
+		{
+			"first empty",
+			args{
+				[]byte(`{}`),
+				[]byte(`{"some": "thing"}`),
+			},
+
+			[]byte(`{"some": "thing"}`),
+			false,
+		},
+		{
+			"second empty",
+			args{
+				[]byte(`{"some": "thing"}`),
+				[]byte(`{}`),
+			},
+
+			[]byte(`{"some": "thing"}`),
+			false,
+		},
+		{
+			"both empty",
+			args{
+				[]byte(`{}`),
+				[]byte(`{}`),
+			},
+
+			[]byte(`{}`),
+			false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, err := ConcatenateJSON(tt.args.first, tt.args.second)
+			if (err != nil) != tt.wantErr {
+				t.Errorf("ConcatenateJSON() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+			if !bytes.Equal(got, tt.want) {
+				t.Errorf("ConcatenateJSON() got = %v, want %v", string(got), tt.want)
+			}
+		})
+	}
+}
+
+func TestMarshalJSONWithStatus(t *testing.T) {
+	type args struct {
+		i      any
+		status int
+	}
+	type res struct {
+		statusCode int
+		body       string
+	}
+	tests := []struct {
+		name string
+		args args
+		res  res
+	}{
+		{
+			"empty ok",
+			args{
+				nil,
+				200,
+			},
+			res{
+				200,
+				"",
+			},
+		},
+		{
+			"string ok",
+			args{
+				"ok",
+				200,
+			},
+			res{
+				200,
+				`"ok"
+`,
+			},
+		},
+		{
+			"struct ok",
+			args{
+				struct {
+					Test string `json:"test"`
+				}{"ok"},
+				200,
+			},
+			res{
+				200,
+				`{"test":"ok"}
+`,
+			},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			w := httptest.NewRecorder()
+			MarshalJSONWithStatus(w, tt.args.i, tt.args.status)
+			assert.Equal(t, tt.res.statusCode, w.Result().StatusCode)
+			assert.Equal(t, "application/json", w.Header().Get("content-type"))
+			assert.Equal(t, tt.res.body, w.Body.String())
+		})
+	}
+}

pkg/oidc/authorization.go

@@ -1,40 +1,44 @@
 package oidc
 
+import (
+	"log/slog"
+)
+
 const (
-	//ScopeOpenID defines the scope `openid`
-	//OpenID Connect requests MUST contain the `openid` scope value
+	// ScopeOpenID defines the scope `openid`
+	// OpenID Connect requests MUST contain the `openid` scope value
 	ScopeOpenID = "openid"
 
-	//ScopeProfile defines the scope `profile`
-	//This (optional) scope value requests access to the End-User's default profile Claims,
-	//which are: name, family_name, given_name, middle_name, nickname, preferred_username,
-	//profile, picture, website, gender, birthdate, zoneinfo, locale, and updated_at.
+	// ScopeProfile defines the scope `profile`
+	// This (optional) scope value requests access to the End-User's default profile Claims,
+	// which are: name, family_name, given_name, middle_name, nickname, preferred_username,
+	// profile, picture, website, gender, birthdate, zoneinfo, locale, and updated_at.
 	ScopeProfile = "profile"
 
-	//ScopeEmail defines the scope `email`
-	//This (optional) scope value requests access to the email and email_verified Claims.
+	// ScopeEmail defines the scope `email`
+	// This (optional) scope value requests access to the email and email_verified Claims.
 	ScopeEmail = "email"
 
-	//ScopeAddress defines the scope `address`
-	//This (optional) scope value requests access to the address Claim.
+	// ScopeAddress defines the scope `address`
+	// This (optional) scope value requests access to the address Claim.
 	ScopeAddress = "address"
 
-	//ScopePhone defines the scope `phone`
-	//This (optional) scope value requests access to the phone_number and phone_number_verified Claims.
+	// ScopePhone defines the scope `phone`
+	// This (optional) scope value requests access to the phone_number and phone_number_verified Claims.
 	ScopePhone = "phone"
 
-	//ScopeOfflineAccess defines the scope `offline_access`
-	//This (optional) scope value requests that an OAuth 2.0 Refresh Token be issued that can be used to obtain an Access Token
-	//that grants access to the End-User's UserInfo Endpoint even when the End-User is not present (not logged in).
+	// ScopeOfflineAccess defines the scope `offline_access`
+	// This (optional) scope value requests that an OAuth 2.0 Refresh Token be issued that can be used to obtain an Access Token
+	// that grants access to the End-User's UserInfo Endpoint even when the End-User is not present (not logged in).
 	ScopeOfflineAccess = "offline_access"
 
-	//ResponseTypeCode for the Authorization Code Flow returning a code from the Authorization Server
+	// ResponseTypeCode for the Authorization Code Flow returning a code from the Authorization Server
 	ResponseTypeCode ResponseType = "code"
 
-	//ResponseTypeIDToken for the Implicit Flow returning id and access tokens directly from the Authorization Server
+	// ResponseTypeIDToken for the Implicit Flow returning id and access tokens directly from the Authorization Server
 	ResponseTypeIDToken ResponseType = "id_token token"
 
-	//ResponseTypeIDTokenOnly for the Implicit Flow returning only id token directly from the Authorization Server
+	// ResponseTypeIDTokenOnly for the Implicit Flow returning only id token directly from the Authorization Server
 	ResponseTypeIDTokenOnly ResponseType = "id_token"
 
 	DisplayPage  Display = "page"
@@ -42,57 +46,76 @@ const (
 	DisplayTouch Display = "touch"
 	DisplayWAP   Display = "wap"
 
-	//PromptNone (`none`) disallows the Authorization Server to display any authentication or consent user interface pages.
-	//An error (login_required, interaction_required, ...) will be returned if the user is not already authenticated or consent is needed
-	PromptNone Prompt = "none"
+	ResponseModeQuery    ResponseMode = "query"
+	ResponseModeFragment ResponseMode = "fragment"
+	ResponseModeFormPost ResponseMode = "form_post"
 
-	//PromptLogin (`login`) directs the Authorization Server to prompt the End-User for reauthentication.
-	PromptLogin Prompt = "login"
+	// PromptNone (`none`) disallows the Authorization Server to display any authentication or consent user interface pages.
+	// An error (login_required, interaction_required, ...) will be returned if the user is not already authenticated or consent is needed
+	PromptNone = "none"
 
-	//PromptConsent (`consent`) directs the Authorization Server to prompt the End-User for consent (of sharing information).
-	PromptConsent Prompt = "consent"
+	// PromptLogin (`login`) directs the Authorization Server to prompt the End-User for reauthentication.
+	PromptLogin = "login"
 
-	//PromptSelectAccount (`select_account `) directs the Authorization Server to prompt the End-User to select a user account (to enable multi user / session switching)
-	PromptSelectAccount Prompt = "select_account"
+	// PromptConsent (`consent`) directs the Authorization Server to prompt the End-User for consent (of sharing information).
+	PromptConsent = "consent"
+
+	// PromptSelectAccount (`select_account `) directs the Authorization Server to prompt the End-User to select a user account (to enable multi user / session switching)
+	PromptSelectAccount = "select_account"
 )
 
-//AuthRequest according to:
-//https://openid.net/specs/openid-connect-core-1_0.html#AuthRequest
+// AuthRequest according to:
+// https://openid.net/specs/openid-connect-core-1_0.html#AuthRequest
 type AuthRequest struct {
-	ID           string
-	Scopes       Scopes       `schema:"scope"`
-	ResponseType ResponseType `schema:"response_type"`
-	ClientID     string       `schema:"client_id"`
-	RedirectURI  string       `schema:"redirect_uri"` //TODO: type
+	Scopes       SpaceDelimitedArray `json:"scope" schema:"scope"`
+	ResponseType ResponseType        `json:"response_type" schema:"response_type"`
+	ClientID     string              `json:"client_id" schema:"client_id"`
+	RedirectURI  string              `json:"redirect_uri" schema:"redirect_uri"`
 
-	State string `schema:"state"`
+	State string `json:"state" schema:"state"`
+	Nonce string `json:"nonce" schema:"nonce"`
 
-	// ResponseMode TODO: ?
+	ResponseMode ResponseMode        `json:"response_mode" schema:"response_mode"`
+	Display      Display             `json:"display" schema:"display"`
+	Prompt       SpaceDelimitedArray `json:"prompt" schema:"prompt"`
+	MaxAge       *uint               `json:"max_age" schema:"max_age"`
+	UILocales    Locales             `json:"ui_locales" schema:"ui_locales"`
+	IDTokenHint  string              `json:"id_token_hint" schema:"id_token_hint"`
+	LoginHint    string              `json:"login_hint" schema:"login_hint"`
+	ACRValues    SpaceDelimitedArray `json:"acr_values" schema:"acr_values"`
 
-	Nonce       string   `schema:"nonce"`
-	Display     Display  `schema:"display"`
-	Prompt      Prompt   `schema:"prompt"`
-	MaxAge      uint32   `schema:"max_age"`
-	UILocales   Locales  `schema:"ui_locales"`
-	IDTokenHint string   `schema:"id_token_hint"`
-	LoginHint   string   `schema:"login_hint"`
-	ACRValues   []string `schema:"acr_values"`
+	CodeChallenge       string              `json:"code_challenge" schema:"code_challenge"`
+	CodeChallengeMethod CodeChallengeMethod `json:"code_challenge_method" schema:"code_challenge_method"`
 
-	CodeChallenge       string              `schema:"code_challenge"`
-	CodeChallengeMethod CodeChallengeMethod `schema:"code_challenge_method"`
+	// RequestParam enables OIDC requests to be passed in a single, self-contained parameter (as JWT, called Request Object)
+	RequestParam string `schema:"request"`
 }
 
-//GetRedirectURI returns the redirect_uri value for the ErrAuthRequest interface
+func (a *AuthRequest) LogValue() slog.Value {
+	return slog.GroupValue(
+		slog.Any("scopes", a.Scopes),
+		slog.String("response_type", string(a.ResponseType)),
+		slog.String("client_id", a.ClientID),
+		slog.String("redirect_uri", a.RedirectURI),
+	)
+}
+
+// GetRedirectURI returns the redirect_uri value for the ErrAuthRequest interface
 func (a *AuthRequest) GetRedirectURI() string {
 	return a.RedirectURI
 }
 
-//GetResponseType returns the response_type value for the ErrAuthRequest interface
+// GetResponseType returns the response_type value for the ErrAuthRequest interface
 func (a *AuthRequest) GetResponseType() ResponseType {
 	return a.ResponseType
 }
 
-//GetState returns the optional state value for the ErrAuthRequest interface
+// GetState returns the optional state value for the ErrAuthRequest interface
 func (a *AuthRequest) GetState() string {
 	return a.State
 }
+
+// GetResponseMode returns the optional ResponseMode
+func (a *AuthRequest) GetResponseMode() ResponseMode {
+	return a.ResponseMode
+}

pkg/oidc/authorization_test.go

@@ -0,0 +1,27 @@
+//go:build go1.20
+
+package oidc
+
+import (
+	"log/slog"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestAuthRequest_LogValue(t *testing.T) {
+	a := &AuthRequest{
+		Scopes:       SpaceDelimitedArray{"a", "b"},
+		ResponseType: "respType",
+		ClientID:     "123",
+		RedirectURI:  "http://example.com/callback",
+	}
+	want := slog.GroupValue(
+		slog.Any("scopes", SpaceDelimitedArray{"a", "b"}),
+		slog.String("response_type", "respType"),
+		slog.String("client_id", "123"),
+		slog.String("redirect_uri", "http://example.com/callback"),
+	)
+	got := a.LogValue()
+	assert.Equal(t, want, got)
+}

pkg/oidc/code_challenge.go

@@ -3,7 +3,7 @@ package oidc
 import (
 	"crypto/sha256"
 
-	"github.com/caos/oidc/pkg/utils"
+	"git.christmann.info/LARA/zitadel-oidc/v3/pkg/crypto"
 )
 
 const (
@@ -19,12 +19,12 @@ type CodeChallenge struct {
 }
 
 func NewSHACodeChallenge(code string) string {
-	return utils.HashString(sha256.New(), code, false)
+	return crypto.HashString(sha256.New(), code, false)
 }
 
 func VerifyCodeChallenge(c *CodeChallenge, codeVerifier string) bool {
 	if c == nil {
-		return false //TODO: ?
+		return false
 	}
 	if c.Method == CodeChallengeMethodS256 {
 		codeVerifier = NewSHACodeChallenge(codeVerifier)

pkg/oidc/device_authorization.go

@@ -0,0 +1,51 @@
+package oidc
+
+import "encoding/json"
+
+// DeviceAuthorizationRequest implements
+// https://www.rfc-editor.org/rfc/rfc8628#section-3.1,
+// 3.1 Device Authorization Request.
+type DeviceAuthorizationRequest struct {
+	Scopes   SpaceDelimitedArray `schema:"scope"`
+	ClientID string              `schema:"client_id"`
+}
+
+// DeviceAuthorizationResponse implements
+// https://www.rfc-editor.org/rfc/rfc8628#section-3.2
+// 3.2.  Device Authorization Response.
+type DeviceAuthorizationResponse struct {
+	DeviceCode              string `json:"device_code"`
+	UserCode                string `json:"user_code"`
+	VerificationURI         string `json:"verification_uri"`
+	VerificationURIComplete string `json:"verification_uri_complete,omitempty"`
+	ExpiresIn               int    `json:"expires_in"`
+	Interval                int    `json:"interval,omitempty"`
+}
+
+func (resp *DeviceAuthorizationResponse) UnmarshalJSON(data []byte) error {
+	type Alias DeviceAuthorizationResponse
+	aux := &struct {
+		// workaround misspelling of verification_uri
+		// https://stackoverflow.com/q/76696956/5690223
+		// https://developers.google.com/identity/protocols/oauth2/limited-input-device?hl=fr#success-response
+		VerificationURL string `json:"verification_url"`
+		*Alias
+	}{
+		Alias: (*Alias)(resp),
+	}
+	if err := json.Unmarshal(data, &aux); err != nil {
+		return err
+	}
+	if resp.VerificationURI == "" {
+		resp.VerificationURI = aux.VerificationURL
+	}
+	return nil
+}
+
+// DeviceAccessTokenRequest implements
+// https://www.rfc-editor.org/rfc/rfc8628#section-3.4,
+// Device Access Token Request.
+type DeviceAccessTokenRequest struct {
+	GrantType  GrantType `json:"grant_type" schema:"grant_type"`
+	DeviceCode string    `json:"device_code" schema:"device_code"`
+}

pkg/oidc/device_authorization_test.go

@@ -0,0 +1,30 @@
+package oidc
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestDeviceAuthorizationResponse_UnmarshalJSON(t *testing.T) {
+	jsonStr := `{
+		"device_code": "deviceCode",
+		"user_code": "userCode",
+		"verification_url": "http://example.com/verify",
+		"expires_in": 3600,
+		"interval": 5
+	}`
+
+	expected := &DeviceAuthorizationResponse{
+		DeviceCode:      "deviceCode",
+		UserCode:        "userCode",
+		VerificationURI: "http://example.com/verify",
+		ExpiresIn:       3600,
+		Interval:        5,
+	}
+
+	var resp DeviceAuthorizationResponse
+	err := resp.UnmarshalJSON([]byte(jsonStr))
+	assert.NoError(t, err)
+	assert.Equal(t, expected, &resp)
+}

pkg/oidc/discovery.go

@@ -5,21 +5,165 @@ const (
 )
 
 type DiscoveryConfiguration struct {
-	Issuer                            string   `json:"issuer,omitempty"`
-	AuthorizationEndpoint             string   `json:"authorization_endpoint,omitempty"`
-	TokenEndpoint                     string   `json:"token_endpoint,omitempty"`
-	IntrospectionEndpoint             string   `json:"introspection_endpoint,omitempty"`
-	UserinfoEndpoint                  string   `json:"userinfo_endpoint,omitempty"`
-	EndSessionEndpoint                string   `json:"end_session_endpoint,omitempty"`
-	CheckSessionIframe                string   `json:"check_session_iframe,omitempty"`
-	JwksURI                           string   `json:"jwks_uri,omitempty"`
-	ScopesSupported                   []string `json:"scopes_supported,omitempty"`
-	ResponseTypesSupported            []string `json:"response_types_supported,omitempty"`
-	ResponseModesSupported            []string `json:"response_modes_supported,omitempty"`
-	GrantTypesSupported               []string `json:"grant_types_supported,omitempty"`
-	SubjectTypesSupported             []string `json:"subject_types_supported,omitempty"`
-	IDTokenSigningAlgValuesSupported  []string `json:"id_token_signing_alg_values_supported,omitempty"`
-	TokenEndpointAuthMethodsSupported []string `json:"token_endpoint_auth_methods_supported,omitempty"`
-	CodeChallengeMethodsSupported     []string `json:"code_challenge_methods_supported,omitempty"`
-	ClaimsSupported                   []string `json:"claims_supported,omitempty"`
+	// Issuer is the identifier of the OP and is used in the tokens as `iss` claim.
+	Issuer string `json:"issuer,omitempty"`
+
+	// AuthorizationEndpoint is the URL of the OAuth 2.0 Authorization Endpoint where all user interactive login start
+	AuthorizationEndpoint string `json:"authorization_endpoint,omitempty"`
+
+	// TokenEndpoint is the URL of the OAuth 2.0 Token Endpoint where all tokens are issued, except when using Implicit Flow
+	TokenEndpoint string `json:"token_endpoint,omitempty"`
+
+	// IntrospectionEndpoint is the URL of the OAuth 2.0 Introspection Endpoint.
+	IntrospectionEndpoint string `json:"introspection_endpoint,omitempty"`
+
+	// UserinfoEndpoint is the URL where an access_token can be used to retrieve the Userinfo.
+	UserinfoEndpoint string `json:"userinfo_endpoint,omitempty"`
+
+	// RevocationEndpoint is the URL of the OAuth 2.0 Revocation Endpoint.
+	RevocationEndpoint string `json:"revocation_endpoint,omitempty"`
+
+	// EndSessionEndpoint is a URL where the RP can perform a redirect to request that the End-User be logged out at the OP.
+	EndSessionEndpoint string `json:"end_session_endpoint,omitempty"`
+
+	DeviceAuthorizationEndpoint string `json:"device_authorization_endpoint,omitempty"`
+
+	// CheckSessionIframe is a URL where the OP provides an iframe that support cross-origin communications for session state information with the RP Client.
+	CheckSessionIframe string `json:"check_session_iframe,omitempty"`
+
+	// JwksURI is the URL of the JSON Web Key Set. This site contains the signing keys that RPs can use to validate the signature.
+	// It may also contain the OP's encryption keys that RPs can use to encrypt request to the OP.
+	JwksURI string `json:"jwks_uri,omitempty"`
+
+	// RegistrationEndpoint is the URL for the Dynamic Client Registration.
+	RegistrationEndpoint string `json:"registration_endpoint,omitempty"`
+
+	// ScopesSupported lists an array of supported scopes. This list must not include every supported scope by the OP.
+	ScopesSupported []string `json:"scopes_supported,omitempty"`
+
+	// ResponseTypesSupported contains a list of the OAuth 2.0 response_type values that the OP supports (code, id_token, token id_token, ...).
+	ResponseTypesSupported []string `json:"response_types_supported,omitempty"`
+
+	// ResponseModesSupported contains a list of the OAuth 2.0 response_mode values that the OP supports. If omitted, the default value is ["query", "fragment"].
+	ResponseModesSupported []string `json:"response_modes_supported,omitempty"`
+
+	// GrantTypesSupported contains a list of the OAuth 2.0 grant_type values that the OP supports. If omitted, the default value is ["authorization_code", "implicit"].
+	GrantTypesSupported []GrantType `json:"grant_types_supported,omitempty"`
+
+	// ACRValuesSupported contains a list of Authentication Context Class References that the OP supports.
+	ACRValuesSupported []string `json:"acr_values_supported,omitempty"`
+
+	// SubjectTypesSupported contains a list of Subject Identifier types that the OP supports (pairwise, public).
+	SubjectTypesSupported []string `json:"subject_types_supported,omitempty"`
+
+	// IDTokenSigningAlgValuesSupported contains a list of JWS signing algorithms (alg values) supported by the OP for the ID Token.
+	IDTokenSigningAlgValuesSupported []string `json:"id_token_signing_alg_values_supported,omitempty"`
+
+	// IDTokenEncryptionAlgValuesSupported contains a list of JWE encryption algorithms (alg values) supported by the OP for the ID Token.
+	IDTokenEncryptionAlgValuesSupported []string `json:"id_token_encryption_alg_values_supported,omitempty"`
+
+	// IDTokenEncryptionEncValuesSupported contains a list of JWE encryption algorithms (enc values) supported by the OP for the ID Token.
+	IDTokenEncryptionEncValuesSupported []string `json:"id_token_encryption_enc_values_supported,omitempty"`
+
+	// UserinfoSigningAlgValuesSupported contains a list of JWS signing algorithms (alg values) supported by the OP for UserInfo Endpoint.
+	UserinfoSigningAlgValuesSupported []string `json:"userinfo_signing_alg_values_supported,omitempty"`
+
+	// UserinfoEncryptionAlgValuesSupported contains a list of JWE encryption algorithms (alg values) supported by the OP for the UserInfo Endpoint.
+	UserinfoEncryptionAlgValuesSupported []string `json:"userinfo_encryption_alg_values_supported,omitempty"`
+
+	// UserinfoEncryptionEncValuesSupported contains a list of JWE encryption algorithms (enc values) supported by the OP for the UserInfo Endpoint.
+	UserinfoEncryptionEncValuesSupported []string `json:"userinfo_encryption_enc_values_supported,omitempty"`
+
+	// RequestObjectSigningAlgValuesSupported contains a list of JWS signing algorithms (alg values) supported by the OP for Request Objects.
+	// These algorithms are used both then the Request Object is passed by value (using the request parameter) and when it is passed by reference (using the request_uri parameter).
+	RequestObjectSigningAlgValuesSupported []string `json:"request_object_signing_alg_values_supported,omitempty"`
+
+	// RequestObjectEncryptionAlgValuesSupported contains a list of JWE encryption algorithms (alg values) supported by the OP for Request Objects.
+	// These algorithms are used both when the Request Object is passed by value and by reference.
+	RequestObjectEncryptionAlgValuesSupported []string `json:"request_object_encryption_alg_values_supported,omitempty"`
+
+	// RequestObjectEncryptionEncValuesSupported contains a list of JWE encryption algorithms (enc values) supported by the OP for Request Objects.
+	// These algorithms are used both when the Request Object is passed by value and by reference.
+	RequestObjectEncryptionEncValuesSupported []string `json:"request_object_encryption_enc_values_supported,omitempty"`
+
+	// TokenEndpointAuthMethodsSupported contains a list of Client Authentication methods supported by the Token Endpoint. If omitted, the default is client_secret_basic.
+	TokenEndpointAuthMethodsSupported []AuthMethod `json:"token_endpoint_auth_methods_supported,omitempty"`
+
+	// TokenEndpointAuthSigningAlgValuesSupported contains a list of JWS signing algorithms (alg values) supported by the Token Endpoint
+	// for the signature of the JWT used to authenticate the Client by private_key_jwt and client_secret_jwt.
+	TokenEndpointAuthSigningAlgValuesSupported []string `json:"token_endpoint_auth_signing_alg_values_supported,omitempty"`
+
+	// RevocationEndpointAuthMethodsSupported contains a list of Client Authentication methods supported by the Revocation Endpoint. If omitted, the default is client_secret_basic.
+	RevocationEndpointAuthMethodsSupported []AuthMethod `json:"revocation_endpoint_auth_methods_supported,omitempty"`
+
+	// RevocationEndpointAuthSigningAlgValuesSupported contains a list of JWS signing algorithms (alg values) supported by the Revocation Endpoint
+	// for the signature of the JWT used to authenticate the Client by private_key_jwt and client_secret_jwt.
+	RevocationEndpointAuthSigningAlgValuesSupported []string `json:"revocation_endpoint_auth_signing_alg_values_supported,omitempty"`
+
+	// IntrospectionEndpointAuthMethodsSupported contains a list of Client Authentication methods supported by the Introspection Endpoint.
+	IntrospectionEndpointAuthMethodsSupported []AuthMethod `json:"introspection_endpoint_auth_methods_supported,omitempty"`
+
+	// IntrospectionEndpointAuthSigningAlgValuesSupported contains a list of JWS signing algorithms (alg values) supported by the Revocation Endpoint
+	// for the signature of the JWT used to authenticate the Client by private_key_jwt and client_secret_jwt.
+	IntrospectionEndpointAuthSigningAlgValuesSupported []string `json:"introspection_endpoint_auth_signing_alg_values_supported,omitempty"`
+
+	// DisplayValuesSupported contains a list of display parameter values that the OP supports (page, popup, touch, wap).
+	DisplayValuesSupported []Display `json:"display_values_supported,omitempty"`
+
+	// ClaimTypesSupported contains a list of Claim Types that the OP supports (normal, aggregated, distributed). If omitted, the default is normal Claims.
+	ClaimTypesSupported []string `json:"claim_types_supported,omitempty"`
+
+	// ClaimsSupported contains a list of Claim Names the OP may be able to supply values for. This list might not be exhaustive.
+	ClaimsSupported []string `json:"claims_supported,omitempty"`
+
+	// ClaimsParameterSupported specifies whether the OP supports use of the `claims` parameter. If omitted, the default is false.
+	ClaimsParameterSupported bool `json:"claims_parameter_supported,omitempty"`
+
+	// CodeChallengeMethodsSupported contains a list of Proof Key for Code Exchange (PKCE) code challenge methods supported by the OP.
+	CodeChallengeMethodsSupported []CodeChallengeMethod `json:"code_challenge_methods_supported,omitempty"`
+
+	// ServiceDocumentation is a URL where developers can get information about the OP and its usage.
+	ServiceDocumentation string `json:"service_documentation,omitempty"`
+
+	// ClaimsLocalesSupported contains a list of BCP47 language tag values that the OP supports for values of Claims returned.
+	ClaimsLocalesSupported Locales `json:"claims_locales_supported,omitempty"`
+
+	// UILocalesSupported contains a list of BCP47 language tag values that the OP supports for the user interface.
+	UILocalesSupported Locales `json:"ui_locales_supported,omitempty"`
+
+	// RequestParameterSupported specifies whether the OP supports use of the `request` parameter. If omitted, the default value is false.
+	RequestParameterSupported bool `json:"request_parameter_supported,omitempty"`
+
+	// RequestURIParameterSupported specifies whether the OP supports use of the `request_uri` parameter. If omitted, the default value is true. (therefore no omitempty)
+	RequestURIParameterSupported bool `json:"request_uri_parameter_supported"`
+
+	// RequireRequestURIRegistration specifies whether the OP requires any `request_uri` to be pre-registered using the request_uris registration parameter. If omitted, the default value is false.
+	RequireRequestURIRegistration bool `json:"require_request_uri_registration,omitempty"`
+
+	// OPPolicyURI is a URL the OP provides to the person registering the Client to read about the OP's requirements on how the RP can use the data provided by the OP.
+	OPPolicyURI string `json:"op_policy_uri,omitempty"`
+
+	// OPTermsOfServiceURI is a URL the OpenID Provider provides to the person registering the Client to read about OpenID Provider's terms of service.
+	OPTermsOfServiceURI string `json:"op_tos_uri,omitempty"`
+
+	// BackChannelLogoutSupported specifies whether the OP supports back-channel logout (https://openid.net/specs/openid-connect-backchannel-1_0.html),
+	// with true indicating support. If omitted, the default value is false.
+	BackChannelLogoutSupported bool `json:"backchannel_logout_supported,omitempty"`
+
+	// BackChannelLogoutSessionSupported specifies whether the OP can pass a sid (session ID) Claim in the Logout Token to identify the RP session with the OP.
+	// If supported, the sid Claim is also included in ID Tokens issued by the OP. If omitted, the default value is false.
+	BackChannelLogoutSessionSupported bool `json:"backchannel_logout_session_supported,omitempty"`
+}
+
+type AuthMethod string
+
+const (
+	AuthMethodBasic         AuthMethod = "client_secret_basic"
+	AuthMethodPost          AuthMethod = "client_secret_post"
+	AuthMethodNone          AuthMethod = "none"
+	AuthMethodPrivateKeyJWT AuthMethod = "private_key_jwt"
+)
+
+var AllAuthMethods = []AuthMethod{
+	AuthMethodBasic, AuthMethodPost, AuthMethodNone, AuthMethodPrivateKeyJWT,
 }

pkg/oidc/error.go

@@ -0,0 +1,256 @@
+package oidc
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"log/slog"
+)
+
+type errorType string
+
+const (
+	InvalidRequest       errorType = "invalid_request"
+	InvalidScope         errorType = "invalid_scope"
+	InvalidClient        errorType = "invalid_client"
+	InvalidGrant         errorType = "invalid_grant"
+	UnauthorizedClient   errorType = "unauthorized_client"
+	UnsupportedGrantType errorType = "unsupported_grant_type"
+	ServerError          errorType = "server_error"
+	InteractionRequired  errorType = "interaction_required"
+	LoginRequired        errorType = "login_required"
+	RequestNotSupported  errorType = "request_not_supported"
+
+	// Additional error codes as defined in
+	// https://www.rfc-editor.org/rfc/rfc8628#section-3.5
+	// Device Access Token Response
+	AuthorizationPending errorType = "authorization_pending"
+	SlowDown             errorType = "slow_down"
+	AccessDenied         errorType = "access_denied"
+	ExpiredToken         errorType = "expired_token"
+
+	// InvalidTarget error is returned by Token Exchange if
+	// the requested target or audience is invalid.
+	// [RFC 8693, Section 2.2.2: Error Response](https://www.rfc-editor.org/rfc/rfc8693#section-2.2.2)
+	InvalidTarget errorType = "invalid_target"
+)
+
+var (
+	ErrInvalidRequest = func() *Error {
+		return &Error{
+			ErrorType: InvalidRequest,
+		}
+	}
+	ErrInvalidRequestRedirectURI = func() *Error {
+		return &Error{
+			ErrorType:        InvalidRequest,
+			redirectDisabled: true,
+		}
+	}
+	ErrInvalidScope = func() *Error {
+		return &Error{
+			ErrorType: InvalidScope,
+		}
+	}
+	ErrInvalidClient = func() *Error {
+		return &Error{
+			ErrorType: InvalidClient,
+		}
+	}
+	ErrInvalidGrant = func() *Error {
+		return &Error{
+			ErrorType: InvalidGrant,
+		}
+	}
+	ErrUnauthorizedClient = func() *Error {
+		return &Error{
+			ErrorType: UnauthorizedClient,
+		}
+	}
+	ErrUnsupportedGrantType = func() *Error {
+		return &Error{
+			ErrorType: UnsupportedGrantType,
+		}
+	}
+	ErrServerError = func() *Error {
+		return &Error{
+			ErrorType: ServerError,
+		}
+	}
+	ErrInteractionRequired = func() *Error {
+		return &Error{
+			ErrorType: InteractionRequired,
+		}
+	}
+	ErrLoginRequired = func() *Error {
+		return &Error{
+			ErrorType: LoginRequired,
+		}
+	}
+	ErrRequestNotSupported = func() *Error {
+		return &Error{
+			ErrorType: RequestNotSupported,
+		}
+	}
+
+	// Device Access Token errors:
+	ErrAuthorizationPending = func() *Error {
+		return &Error{
+			ErrorType:   AuthorizationPending,
+			Description: "The client SHOULD repeat the access token request to the token endpoint, after interval from device authorization response.",
+		}
+	}
+	ErrSlowDown = func() *Error {
+		return &Error{
+			ErrorType:   SlowDown,
+			Description: "Polling should continue, but the interval MUST be increased by 5 seconds for this and all subsequent requests.",
+		}
+	}
+	ErrAccessDenied = func() *Error {
+		return &Error{
+			ErrorType:   AccessDenied,
+			Description: "The authorization request was denied.",
+		}
+	}
+	ErrExpiredDeviceCode = func() *Error {
+		return &Error{
+			ErrorType:   ExpiredToken,
+			Description: "The \"device_code\" has expired.",
+		}
+	}
+
+	// Token exchange error
+	ErrInvalidTarget = func() *Error {
+		return &Error{
+			ErrorType:   InvalidTarget,
+			Description: "The requested audience or target is invalid.",
+		}
+	}
+)
+
+type Error struct {
+	Parent           error     `json:"-" schema:"-"`
+	ErrorType        errorType `json:"error" schema:"error"`
+	Description      string    `json:"error_description,omitempty" schema:"error_description,omitempty"`
+	State            string    `json:"state,omitempty" schema:"state,omitempty"`
+	SessionState     string    `json:"session_state,omitempty" schema:"session_state,omitempty"`
+	redirectDisabled bool      `schema:"-"`
+	returnParent     bool      `schema:"-"`
+}
+
+func (e *Error) MarshalJSON() ([]byte, error) {
+	m := struct {
+		Error            errorType `json:"error"`
+		ErrorDescription string    `json:"error_description,omitempty"`
+		State            string    `json:"state,omitempty"`
+		SessionState     string    `json:"session_state,omitempty"`
+		Parent           string    `json:"parent,omitempty"`
+	}{
+		Error:            e.ErrorType,
+		ErrorDescription: e.Description,
+		State:            e.State,
+		SessionState:     e.SessionState,
+	}
+	if e.returnParent {
+		m.Parent = e.Parent.Error()
+	}
+	return json.Marshal(m)
+}
+
+func (e *Error) Error() string {
+	message := "ErrorType=" + string(e.ErrorType)
+	if e.Description != "" {
+		message += " Description=" + e.Description
+	}
+	if e.Parent != nil {
+		message += " Parent=" + e.Parent.Error()
+	}
+	return message
+}
+
+func (e *Error) Unwrap() error {
+	return e.Parent
+}
+
+func (e *Error) Is(target error) bool {
+	t, ok := target.(*Error)
+	if !ok {
+		return false
+	}
+	return e.ErrorType == t.ErrorType &&
+		(e.Description == t.Description || t.Description == "") &&
+		(e.State == t.State || t.State == "") &&
+		(e.SessionState == t.SessionState || t.SessionState == "")
+}
+
+func (e *Error) WithParent(err error) *Error {
+	e.Parent = err
+	return e
+}
+
+// WithReturnParentToClient allows returning the set parent error to the HTTP client.
+// Currently it only supports setting the parent inside JSON responses, not redirect URLs.
+// As Go errors don't unmarshal well, only the marshaller is implemented for the moment.
+//
+// Warning: parent errors may contain sensitive data or unwanted details about the server status.
+// Also, the `parent` field is not a standard error field and might confuse certain clients
+// that require fully compliant responses.
+func (e *Error) WithReturnParentToClient(b bool) *Error {
+	e.returnParent = b
+	return e
+}
+
+func (e *Error) WithDescription(desc string, args ...any) *Error {
+	e.Description = fmt.Sprintf(desc, args...)
+	return e
+}
+
+func (e *Error) IsRedirectDisabled() bool {
+	return e.redirectDisabled
+}
+
+// DefaultToServerError checks if the error is an Error
+// if not the provided error will be wrapped into a ServerError
+func DefaultToServerError(err error, description string) *Error {
+	oauth := new(Error)
+	if ok := errors.As(err, &oauth); !ok {
+		oauth.ErrorType = ServerError
+		oauth.Description = description
+		oauth.Parent = err
+	}
+	return oauth
+}
+
+func (e *Error) LogLevel() slog.Level {
+	level := slog.LevelWarn
+	if e.ErrorType == ServerError {
+		level = slog.LevelError
+	}
+	if e.ErrorType == AuthorizationPending {
+		level = slog.LevelInfo
+	}
+	return level
+}
+
+func (e *Error) LogValue() slog.Value {
+	attrs := make([]slog.Attr, 0, 5)
+	if e.Parent != nil {
+		attrs = append(attrs, slog.Any("parent", e.Parent))
+	}
+	if e.Description != "" {
+		attrs = append(attrs, slog.String("description", e.Description))
+	}
+	if e.ErrorType != "" {
+		attrs = append(attrs, slog.String("type", string(e.ErrorType)))
+	}
+	if e.State != "" {
+		attrs = append(attrs, slog.String("state", e.State))
+	}
+	if e.SessionState != "" {
+		attrs = append(attrs, slog.String("session_state", e.SessionState))
+	}
+	if e.redirectDisabled {
+		attrs = append(attrs, slog.Bool("redirect_disabled", e.redirectDisabled))
+	}
+	return slog.GroupValue(attrs...)
+}

pkg/oidc/error_test.go

@@ -0,0 +1,192 @@
+package oidc
+
+import (
+	"encoding/json"
+	"errors"
+	"io"
+	"log/slog"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestDefaultToServerError(t *testing.T) {
+	type args struct {
+		err         error
+		description string
+	}
+	tests := []struct {
+		name string
+		args args
+		want *Error
+	}{
+		{
+			name: "default",
+			args: args{
+				err:         io.ErrClosedPipe,
+				description: "oops",
+			},
+			want: &Error{
+				ErrorType:   ServerError,
+				Description: "oops",
+				Parent:      io.ErrClosedPipe,
+			},
+		},
+		{
+			name: "our Error",
+			args: args{
+				err:         ErrAccessDenied(),
+				description: "oops",
+			},
+			want: &Error{
+				ErrorType:   AccessDenied,
+				Description: "The authorization request was denied.",
+			},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := DefaultToServerError(tt.args.err, tt.args.description)
+			assert.ErrorIs(t, got, tt.want)
+		})
+	}
+}
+
+func TestError_LogLevel(t *testing.T) {
+	tests := []struct {
+		name string
+		err  *Error
+		want slog.Level
+	}{
+		{
+			name: "server error",
+			err:  ErrServerError(),
+			want: slog.LevelError,
+		},
+		{
+			name: "authorization pending",
+			err:  ErrAuthorizationPending(),
+			want: slog.LevelInfo,
+		},
+		{
+			name: "some other error",
+			err:  ErrAccessDenied(),
+			want: slog.LevelWarn,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := tt.err.LogLevel()
+			assert.Equal(t, tt.want, got)
+		})
+	}
+}
+
+func TestError_LogValue(t *testing.T) {
+	type fields struct {
+		Parent           error
+		ErrorType        errorType
+		Description      string
+		State            string
+		redirectDisabled bool
+	}
+	tests := []struct {
+		name   string
+		fields fields
+		want   slog.Value
+	}{
+		{
+			name: "parent",
+			fields: fields{
+				Parent: io.EOF,
+			},
+			want: slog.GroupValue(slog.Any("parent", io.EOF)),
+		},
+		{
+			name: "description",
+			fields: fields{
+				Description: "oops",
+			},
+			want: slog.GroupValue(slog.String("description", "oops")),
+		},
+		{
+			name: "errorType",
+			fields: fields{
+				ErrorType: ExpiredToken,
+			},
+			want: slog.GroupValue(slog.String("type", string(ExpiredToken))),
+		},
+		{
+			name: "state",
+			fields: fields{
+				State: "123",
+			},
+			want: slog.GroupValue(slog.String("state", "123")),
+		},
+		{
+			name: "all fields",
+			fields: fields{
+				Parent:      io.EOF,
+				Description: "oops",
+				ErrorType:   ExpiredToken,
+				State:       "123",
+			},
+			want: slog.GroupValue(
+				slog.Any("parent", io.EOF),
+				slog.String("description", "oops"),
+				slog.String("type", string(ExpiredToken)),
+				slog.String("state", "123"),
+			),
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			e := &Error{
+				Parent:           tt.fields.Parent,
+				ErrorType:        tt.fields.ErrorType,
+				Description:      tt.fields.Description,
+				State:            tt.fields.State,
+				redirectDisabled: tt.fields.redirectDisabled,
+			}
+			got := e.LogValue()
+			assert.Equal(t, tt.want, got)
+		})
+	}
+}
+
+func TestError_MarshalJSON(t *testing.T) {
+	tests := []struct {
+		name string
+		e    *Error
+		want string
+	}{
+		{
+			name: "simple error",
+			e:    ErrAccessDenied(),
+			want: `{"error":"access_denied","error_description":"The authorization request was denied."}`,
+		},
+		{
+			name: "with description",
+			e:    ErrAccessDenied().WithDescription("oops"),
+			want: `{"error":"access_denied","error_description":"oops"}`,
+		},
+		{
+			name: "with parent",
+			e:    ErrServerError().WithParent(errors.New("oops")),
+			want: `{"error":"server_error"}`,
+		},
+		{
+			name: "with return parent",
+			e:    ErrServerError().WithParent(errors.New("oops")).WithReturnParentToClient(true),
+			want: `{"error":"server_error","parent":"oops"}`,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, err := json.Marshal(tt.e)
+			require.NoError(t, err)
+			assert.JSONEq(t, tt.want, string(got))
+		})
+	}
+}

pkg/oidc/grants/client_credentials.go

@@ -13,8 +13,8 @@ type clientCredentialsGrant struct {
 	clientSecret string `schema:"client_secret"`
 }
 
-//ClientCredentialsGrantBasic creates an oauth2 `Client Credentials` Grant
-//sneding client_id and client_secret as basic auth header
+// ClientCredentialsGrantBasic creates an oauth2 `Client Credentials` Grant
+// sending client_id and client_secret as basic auth header
 func ClientCredentialsGrantBasic(scopes ...string) *clientCredentialsGrantBasic {
 	return &clientCredentialsGrantBasic{
 		grantType: "client_credentials",
@@ -22,8 +22,8 @@ func ClientCredentialsGrantBasic(scopes ...string) *clientCredentialsGrantBasic
 	}
 }
 
-//ClientCredentialsGrantValues creates an oauth2 `Client Credentials` Grant
-//sneding client_id and client_secret as form values
+// ClientCredentialsGrantValues creates an oauth2 `Client Credentials` Grant
+// sending client_id and client_secret as form values
 func ClientCredentialsGrantValues(clientID, clientSecret string, scopes ...string) *clientCredentialsGrant {
 	return &clientCredentialsGrant{
 		clientCredentialsGrantBasic: ClientCredentialsGrantBasic(scopes...),

pkg/oidc/grants/tokenexchange/tokenexchange.go

@@ -1,9 +1,5 @@
 package tokenexchange
 
-import (
-	"github.com/caos/oidc/pkg/oidc"
-)
-
 const (
 	AccessTokenType     = "urn:ietf:params:oauth:token-type:access_token"
 	RefreshTokenType    = "urn:ietf:params:oauth:token-type:refresh_token"
@@ -26,22 +22,6 @@ type TokenExchangeRequest struct {
 	requestedTokenType string   `schema:"requested_token_type"`
 }
 
-type JWTProfileRequest struct {
-	Assertion string         `schema:"assertion"`
-	Scope     oidc.Scopes    `schema:"scope"`
-	GrantType oidc.GrantType `schema:"grant_type"`
-}
-
-//ClientCredentialsGrantBasic creates an oauth2 `Client Credentials` Grant
-//sneding client_id and client_secret as basic auth header
-func NewJWTProfileRequest(assertion string, scopes ...string) *JWTProfileRequest {
-	return &JWTProfileRequest{
-		GrantType: oidc.GrantTypeBearer,
-		Assertion: assertion,
-		Scope:     scopes,
-	}
-}
-
 func NewTokenExchangeRequest(subjectToken, subjectTokenType string, opts ...TokenExchangeOption) *TokenExchangeRequest {
 	t := &TokenExchangeRequest{
 		grantType:          TokenExchangeGrantType,

pkg/oidc/introspection.go

@@ -0,0 +1,79 @@
+package oidc
+
+import "github.com/muhlemmer/gu"
+
+type IntrospectionRequest struct {
+	Token string `schema:"token"`
+}
+
+type ClientAssertionParams struct {
+	ClientAssertion     string `schema:"client_assertion"`
+	ClientAssertionType string `schema:"client_assertion_type"`
+}
+
+// IntrospectionResponse implements RFC 7662, section 2.2 and
+// OpenID Connect Core 1.0, section 5.1 (UserInfo).
+// https://www.rfc-editor.org/rfc/rfc7662.html#section-2.2.
+// https://openid.net/specs/openid-connect-core-1_0.html#StandardClaims.
+type IntrospectionResponse struct {
+	Active                          bool                `json:"active"`
+	Scope                           SpaceDelimitedArray `json:"scope,omitempty"`
+	ClientID                        string              `json:"client_id,omitempty"`
+	TokenType                       string              `json:"token_type,omitempty"`
+	Expiration                      Time                `json:"exp,omitempty"`
+	IssuedAt                        Time                `json:"iat,omitempty"`
+	AuthTime                        Time                `json:"auth_time,omitempty"`
+	NotBefore                       Time                `json:"nbf,omitempty"`
+	Subject                         string              `json:"sub,omitempty"`
+	Audience                        Audience            `json:"aud,omitempty"`
+	AuthenticationMethodsReferences []string            `json:"amr,omitempty"`
+	Issuer                          string              `json:"iss,omitempty"`
+	JWTID                           string              `json:"jti,omitempty"`
+	Username                        string              `json:"username,omitempty"`
+	Actor                           *ActorClaims        `json:"act,omitempty"`
+	UserInfoProfile
+	UserInfoEmail
+	UserInfoPhone
+
+	Address *UserInfoAddress `json:"address,omitempty"`
+	Claims  map[string]any   `json:"-"`
+}
+
+// SetUserInfo copies all relevant fields from UserInfo
+// into the IntroSpectionResponse.
+func (i *IntrospectionResponse) SetUserInfo(u *UserInfo) {
+	i.Subject = u.Subject
+	i.Username = u.PreferredUsername
+	i.Address = gu.PtrCopy(u.Address)
+	i.UserInfoProfile = u.UserInfoProfile
+	i.UserInfoEmail = u.UserInfoEmail
+	i.UserInfoPhone = u.UserInfoPhone
+	if i.Claims == nil {
+		i.Claims = gu.MapCopy(u.Claims)
+	} else {
+		gu.MapMerge(u.Claims, i.Claims)
+	}
+}
+
+// GetAddress is a safe getter that takes
+// care of a possible nil value.
+func (i *IntrospectionResponse) GetAddress() *UserInfoAddress {
+	if i.Address == nil {
+		return new(UserInfoAddress)
+	}
+	return i.Address
+}
+
+// introspectionResponseAlias prevents loops on the JSON methods
+type introspectionResponseAlias IntrospectionResponse
+
+func (i *IntrospectionResponse) MarshalJSON() ([]byte, error) {
+	if i.Username == "" {
+		i.Username = i.PreferredUsername
+	}
+	return mergeAndMarshalClaims((*introspectionResponseAlias)(i), i.Claims)
+}
+
+func (i *IntrospectionResponse) UnmarshalJSON(data []byte) error {
+	return unmarshalJSONMulti(data, (*introspectionResponseAlias)(i), &i.Claims)
+}

pkg/oidc/introspection_test.go

@@ -0,0 +1,79 @@
+package oidc
+
+import (
+	"encoding/json"
+	"testing"
+
+	"github.com/muhlemmer/gu"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestIntrospectionResponse_SetUserInfo(t *testing.T) {
+	tests := []struct {
+		name  string
+		start *IntrospectionResponse
+		want  *IntrospectionResponse
+	}{
+		{
+
+			name:  "nil claims",
+			start: &IntrospectionResponse{},
+			want: &IntrospectionResponse{
+				Subject:         userInfoData.Subject,
+				Username:        userInfoData.PreferredUsername,
+				Address:         userInfoData.Address,
+				UserInfoProfile: userInfoData.UserInfoProfile,
+				UserInfoEmail:   userInfoData.UserInfoEmail,
+				UserInfoPhone:   userInfoData.UserInfoPhone,
+				Claims:          gu.MapCopy(userInfoData.Claims),
+			},
+		},
+		{
+
+			name: "merge claims",
+			start: &IntrospectionResponse{
+				Claims: map[string]any{
+					"hello": "world",
+				},
+			},
+			want: &IntrospectionResponse{
+				Subject:         userInfoData.Subject,
+				Username:        userInfoData.PreferredUsername,
+				Address:         userInfoData.Address,
+				UserInfoProfile: userInfoData.UserInfoProfile,
+				UserInfoEmail:   userInfoData.UserInfoEmail,
+				UserInfoPhone:   userInfoData.UserInfoPhone,
+				Claims: map[string]any{
+					"foo":   "bar",
+					"hello": "world",
+				},
+			},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			tt.start.SetUserInfo(userInfoData)
+			assert.Equal(t, tt.want, tt.start)
+		})
+	}
+}
+
+func TestIntrospectionResponse_GetAddress(t *testing.T) {
+	// nil address
+	i := new(IntrospectionResponse)
+	assert.Equal(t, &UserInfoAddress{}, i.GetAddress())
+
+	i.Address = &UserInfoAddress{PostalCode: "1234"}
+	assert.Equal(t, i.Address, i.GetAddress())
+}
+
+func TestIntrospectionResponse_MarshalJSON(t *testing.T) {
+	got, err := json.Marshal(&IntrospectionResponse{
+		UserInfoProfile: UserInfoProfile{
+			PreferredUsername: "muhlemmer",
+		},
+	})
+	require.NoError(t, err)
+	assert.Equal(t, string(got), `{"active":false,"username":"muhlemmer","preferred_username":"muhlemmer"}`)
+}

pkg/oidc/jwt_profile.go

@@ -0,0 +1,18 @@
+package oidc
+
+type JWTProfileGrantRequest struct {
+	Assertion string              `schema:"assertion"`
+	Scope     SpaceDelimitedArray `schema:"scope"`
+	GrantType GrantType           `schema:"grant_type"`
+}
+
+// NewJWTProfileGrantRequest creates an oauth2 `JSON Web Token (JWT) Profile` Grant
+//`urn:ietf:params:oauth:grant-type:jwt-bearer`
+// sending a self-signed jwt as assertion
+func NewJWTProfileGrantRequest(assertion string, scopes ...string) *JWTProfileGrantRequest {
+	return &JWTProfileGrantRequest{
+		GrantType: GrantTypeBearer,
+		Assertion: assertion,
+		Scope:     scopes,
+	}
+}

pkg/oidc/keyset.go

@@ -2,29 +2,108 @@ package oidc
 
 import (
 	"context"
+	"crypto/ecdsa"
+	"crypto/ed25519"
+	"crypto/rsa"
+	"errors"
+	"strings"
 
-	"gopkg.in/square/go-jose.v2"
+	jose "github.com/go-jose/go-jose/v4"
 )
 
-//KeySet represents a set of JSON Web Keys
+const (
+	KeyUseSignature = "sig"
+)
+
+var (
+	ErrKeyMultiple = errors.New("multiple possible keys match")
+	ErrKeyNone     = errors.New("no possible keys matches")
+)
+
+// KeySet represents a set of JSON Web Keys
 // - remotely fetch via discovery and jwks_uri -> `remoteKeySet`
 // - held by the OP itself in storage -> `openIDKeySet`
 // - dynamically aggregated by request for OAuth JWT Profile Assertion -> `jwtProfileKeySet`
 type KeySet interface {
-	//VerifySignature verifies the signature with the given keyset and returns the raw payload
+	// VerifySignature verifies the signature with the given keyset and returns the raw payload
 	VerifySignature(ctx context.Context, jws *jose.JSONWebSignature) (payload []byte, err error)
 }
 
-//CheckKey searches the given JSON Web Keys for the requested key ID
-//and verifies the JSON Web Signature with the found key
+// GetKeyIDAndAlg returns the `kid` and `alg` claim from the JWS header
+func GetKeyIDAndAlg(jws *jose.JSONWebSignature) (string, string) {
+	keyID := ""
+	alg := ""
+	for _, sig := range jws.Signatures {
+		keyID = sig.Header.KeyID
+		alg = sig.Header.Algorithm
+		break
+	}
+	return keyID, alg
+}
+
+// FindKey searches the given JSON Web Keys for the requested key ID, usage and key type
 //
-//will return false but no error if key ID is not found
-func CheckKey(keyID string, jws *jose.JSONWebSignature, keys ...jose.JSONWebKey) ([]byte, error, bool) {
-	for _, key := range keys {
-		if keyID == "" || key.KeyID == keyID {
-			payload, err := jws.Verify(&key)
-			return payload, err, true
+// will return the key immediately if matches exact (id, usage, type)
+//
+// will return false none or multiple match
+//
+// deprecated: use FindMatchingKey which will return an error (more specific) instead of just a bool
+// moved implementation already to FindMatchingKey
+func FindKey(keyID, use, expectedAlg string, keys ...jose.JSONWebKey) (jose.JSONWebKey, bool) {
+	key, err := FindMatchingKey(keyID, use, expectedAlg, keys...)
+	return key, err == nil
+}
+
+// FindMatchingKey searches the given JSON Web Keys for the requested key ID, usage and alg type
+//
+// will return the key immediately if matches exact (id, usage, type)
+//
+// will return a specific error if none (ErrKeyNone) or multiple (ErrKeyMultiple) match
+func FindMatchingKey(keyID, use, expectedAlg string, keys ...jose.JSONWebKey) (key jose.JSONWebKey, err error) {
+	var validKeys []jose.JSONWebKey
+	for _, k := range keys {
+		// ignore all keys with wrong use (let empty use of published key pass)
+		if k.Use != use && k.Use != "" {
+			continue
+		}
+		// ignore all keys with wrong algorithm type
+		if !algToKeyType(k.Key, expectedAlg) {
+			continue
+		}
+		// if we get here, use and alg match, so an equal (not empty) keyID is an exact match
+		if k.KeyID == keyID && keyID != "" {
+			return k, nil
+		}
+		// keyIDs did not match or at least one was empty (if later, then it could be a match)
+		if k.KeyID == "" || keyID == "" {
+			validKeys = append(validKeys, k)
 		}
 	}
-	return nil, nil, false
+	// if we get here, no match was possible at all (use / alg) or no exact match due to
+	// the signed JWT and / or the published keys didn't have a kid
+	// if later applies and only one key could be found, we'll return it
+	// otherwise a corresponding error will be thrown
+	if len(validKeys) == 1 {
+		return validKeys[0], nil
+	}
+	if len(validKeys) > 1 {
+		return key, ErrKeyMultiple
+	}
+	return key, ErrKeyNone
+}
+
+func algToKeyType(key any, alg string) bool {
+	if strings.HasPrefix(alg, "RS") || strings.HasPrefix(alg, "PS") {
+		_, ok := key.(*rsa.PublicKey)
+		return ok
+	}
+	if strings.HasPrefix(alg, "ES") {
+		_, ok := key.(*ecdsa.PublicKey)
+		return ok
+	}
+	if alg == string(jose.EdDSA) {
+		_, ok := key.(ed25519.PublicKey)
+		return ok
+	}
+	return false
 }