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chore: Make example/server usable for tests (#205)

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* internal -> storage; split users into an interface

* move example/server/*.go to example/server/exampleop/

* export all User fields

* storage -> Storage

* example server now passes tests
This commit is contained in:
David Sharnoff 2022-09-29 22:44:10 -07:00 • committed by GitHub
parent 62daf4cc42
commit 749c30491b
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11 changed files with 860 additions and 753 deletions
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192
example/server/storage/client.go Normal file
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package storage
import (
"time"
"github.com/zitadel/oidc/pkg/oidc"
"github.com/zitadel/oidc/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
}
// 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: 0,
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},
grantTypes: []oidc.GrantType{oidc.GrantTypeCode, oidc.GrantTypeRefreshToken},
accessTokenType: 0,
devMode: false,
idTokenUserinfoClaimsAssertion: false,
clockSkew: 0,
}
}

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package storage
import (
"time"
"golang.org/x/text/language"
"github.com/zitadel/oidc/pkg/op"
"github.com/zitadel/oidc/pkg/oidc"
)
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"
)
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
Nonce string
CodeChallenge *OIDCCodeChallenge
passwordChecked bool
authTime time.Time
}
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.passwordChecked {
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 "" // we won't handle response mode in this example
}
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.passwordChecked // this example only uses password for authentication
}
func PromptToInternal(oidcPrompt oidc.SpaceDelimitedArray) []string {
prompts := make([]string, 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,
Nonce: authReq.Nonce,
CodeChallenge: &OIDCCodeChallenge{
Challenge: authReq.CodeChallenge,
Method: string(authReq.CodeChallengeMethod),
},
}
}
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
}

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example/server/storage/storage.go Normal file
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package storage
import (
"context"
"crypto/rand"
"crypto/rsa"
"fmt"
"math/big"
"sync"
"time"
"github.com/google/uuid"
"gopkg.in/square/go-jose.v2"
"github.com/zitadel/oidc/pkg/oidc"
"github.com/zitadel/oidc/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{}
// var _ 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
}
type signingKey struct {
ID string
Algorithm string
Key *rsa.PrivateKey
}
func NewStorage(userStore UserStore) *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: "id",
Algorithm: "RS256",
Key: key,
},
}
}
// 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.passwordChecked = true
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()
// 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
// if authenticated for an app (auth code / implicit flow) we must save the client_id to the token
authReq, ok := request.(*AuthRequest)
if ok {
applicationID = authReq.ApplicationID
}
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) {
// 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
refreshToken, refreshTokenID, err := s.renewRefreshToken(currentRefreshToken)
if err != nil {
return "", "", time.Time{}, err
}
accessToken, err := s.accessToken(applicationID, refreshTokenID, request.GetSubject(), request.GetAudience(), request.GetScopes())
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
}
}
return 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, token 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[token]
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[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")
}
// if it is a refresh token, you will have to remove the access token as well
delete(s.refreshTokens, refreshToken.ID)
for _, accessToken := range s.tokens {
if accessToken.RefreshTokenID == refreshToken.ID {
delete(s.tokens, accessToken.ID)
return nil
}
}
return nil
}
// GetSigningKey implements the op.Storage interface
// it will be called when creating the OpenID Provider
func (s *Storage) GetSigningKey(ctx context.Context, keyCh chan<- jose.SigningKey) {
// 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
//
// the idea of the signing key channel is, that you can (with what ever mechanism) rotate your signing key and
// switch the key of the signer via this channel
keyCh <- jose.SigningKey{
Algorithm: jose.SignatureAlgorithm(s.signingKey.Algorithm), // always tell the signer with algorithm to use
Key: jose.JSONWebKey{
KeyID: s.signingKey.ID, // always give the key an id so, that it will include it in the token header as `kid` claim
Key: s.signingKey.Key,
},
}
}
// GetKeySet 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) GetKeySet(ctx context.Context) (*jose.JSONWebKeySet, 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 (e.g. rotate private key every
return &jose.JSONWebKeySet{
Keys: []jose.JSONWebKey{
{
KeyID: s.signingKey.ID,
Algorithm: s.signingKey.Algorithm,
Use: oidc.KeyUseSignature,
Key: &s.signingKey.Key.PublicKey,
},
},
}, 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 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
// 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) SetUserinfoFromScopes(ctx context.Context, userinfo oidc.UserInfoSetter, userID, clientID string, scopes []string) error {
return s.setUserinfo(ctx, userinfo, userID, clientID, 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.UserInfoSetter, 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
// }
//}
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)
err := s.setUserinfo(ctx, introspection, subject, clientID, token.Scopes)
if err != nil {
return err
}
//...and also the requested scopes...
introspection.SetScopes(token.Scopes)
//...and the client the token was issued to
introspection.SetClientID(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]interface{}, err error) {
for _, scope := range scopes {
switch scope {
case CustomScope:
claims = appendClaim(claims, CustomClaim, customClaim(clientID))
}
}
return claims, nil
}
// GetKeyByIDAndUserID implements the op.Storage interface
// it will be called to validate the signatures of a JWT (JWT Profile Grant and Authentication)
func (s *Storage) GetKeyByIDAndUserID(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,
}
s.refreshTokens[token.ID] = token
return token.Token, nil
}
// renewRefreshToken checks the provided refresh_token and creates a new one based on the current
func (s *Storage) renewRefreshToken(currentRefreshToken string) (string, 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 and all access tokens which were issued based on this refresh token
delete(s.refreshTokens, currentRefreshToken)
for _, token := range s.tokens {
if token.RefreshTokenID == currentRefreshToken {
delete(s.tokens, token.ID)
break
}
}
// creates a new refresh token based on the current one
token := uuid.NewString()
refreshToken.Token = token
s.refreshTokens[token] = refreshToken
return token, refreshToken.ID, 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.UserInfoSetter, 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.SetSubject(user.ID)
case oidc.ScopeEmail:
userInfo.SetEmail(user.Email, user.EmailVerified)
case oidc.ScopeProfile:
userInfo.SetPreferredUsername(user.Username)
userInfo.SetName(user.FirstName + " " + user.LastName)
userInfo.SetFamilyName(user.LastName)
userInfo.SetGivenName(user.FirstName)
userInfo.SetLocale(user.PreferredLanguage)
case oidc.ScopePhone:
userInfo.SetPhone(user.Phone, 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
}
// 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]interface{} {
return map[string]interface{}{
"client": clientID,
"other": "stuff",
}
}
func appendClaim(claims map[string]interface{}, claim string, value interface{}) map[string]interface{} {
if claims == nil {
claims = make(map[string]interface{})
}
claims[claim] = value
return claims
}

25
example/server/storage/token.go Normal file
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@ -0,0 +1,25 @@
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
}

71
example/server/storage/user.go Normal file
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@ -0,0 +1,71 @@
package storage
import (
"crypto/rsa"
"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
}
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 NewUserStore() UserStore {
return userStore{
users: map[string]*User{
"id1": {
ID: "id1",
Username: "test-user",
Password: "verysecure",
FirstName: "Test",
LastName: "User",
Email: "test-user@zitadel.ch",
EmailVerified: true,
Phone: "",
PhoneVerified: false,
PreferredLanguage: language.German,
},
},
}
}
// 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
}