115 lines
3.7 KiB
Go
115 lines
3.7 KiB
Go
package op
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import (
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"context"
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"net/http"
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"net/url"
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httphelper "github.com/zitadel/oidc/pkg/http"
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"github.com/zitadel/oidc/pkg/oidc"
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)
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// ClientCredentialsExchange handles the OAuth 2.0 client_credentials grant, including
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// parsing, validating, authorizing the client and finally returning a token
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func ClientCredentialsExchange(w http.ResponseWriter, r *http.Request, exchanger Exchanger) {
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request, err := ParseClientCredentialsRequest(r, exchanger.Decoder())
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if err != nil {
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RequestError(w, r, err)
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}
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validatedRequest, client, err := ValidateClientCredentialsRequest(r.Context(), request, exchanger)
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if err != nil {
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RequestError(w, r, err)
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return
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}
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resp, err := CreateClientCredentialsTokenResponse(r.Context(), validatedRequest, exchanger, client)
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if err != nil {
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RequestError(w, r, err)
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return
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}
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httphelper.MarshalJSON(w, resp)
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}
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// ParseClientCredentialsRequest parsed the http request into a oidc.ClientCredentialsRequest
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func ParseClientCredentialsRequest(r *http.Request, decoder httphelper.Decoder) (*oidc.ClientCredentialsRequest, error) {
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err := r.ParseForm()
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if err != nil {
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return nil, oidc.ErrInvalidRequest().WithDescription("error parsing form").WithParent(err)
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}
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request := new(oidc.ClientCredentialsRequest)
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err = decoder.Decode(request, r.Form)
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if err != nil {
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return nil, oidc.ErrInvalidRequest().WithDescription("error decoding form").WithParent(err)
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}
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if clientID, clientSecret, ok := r.BasicAuth(); ok {
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clientID, err = url.QueryUnescape(clientID)
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if err != nil {
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return nil, oidc.ErrInvalidClient().WithDescription("invalid basic auth header").WithParent(err)
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}
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clientSecret, err = url.QueryUnescape(clientSecret)
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if err != nil {
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return nil, oidc.ErrInvalidClient().WithDescription("invalid basic auth header").WithParent(err)
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}
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request.ClientID = clientID
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request.ClientSecret = clientSecret
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}
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return request, nil
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}
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// ValidateClientCredentialsRequest validates the refresh_token request parameters including authorization check of the client
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// and returns the data representing the original auth request corresponding to the refresh_token
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func ValidateClientCredentialsRequest(ctx context.Context, request *oidc.ClientCredentialsRequest, exchanger Exchanger) (TokenRequest, Client, error) {
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storage, ok := exchanger.Storage().(ClientCredentialsStorage)
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if !ok {
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return nil, nil, oidc.ErrUnsupportedGrantType().WithDescription("client_credentials grant not supported")
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}
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client, err := AuthorizeClientCredentialsClient(ctx, request, exchanger)
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if err != nil {
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return nil, nil, err
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}
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tokenRequest, err := storage.ClientCredentialsTokenRequest(ctx, request.ClientID, request.Scope)
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if err != nil {
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return nil, nil, err
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}
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return tokenRequest, client, nil
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}
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func AuthorizeClientCredentialsClient(ctx context.Context, request *oidc.ClientCredentialsRequest, exchanger Exchanger) (Client, error) {
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if err := AuthorizeClientIDSecret(ctx, request.ClientID, request.ClientSecret, exchanger.Storage()); err != nil {
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return nil, err
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}
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client, err := exchanger.Storage().GetClientByClientID(ctx, request.ClientID)
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if err != nil {
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return nil, oidc.ErrInvalidClient().WithParent(err)
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}
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if !ValidateGrantType(client, oidc.GrantTypeClientCredentials) {
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return nil, oidc.ErrUnauthorizedClient()
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}
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return client, nil
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}
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func CreateClientCredentialsTokenResponse(ctx context.Context, tokenRequest TokenRequest, creator TokenCreator, client Client) (*oidc.AccessTokenResponse, error) {
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accessToken, _, validity, err := CreateAccessToken(ctx, tokenRequest, AccessTokenTypeJWT, creator, client, "")
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if err != nil {
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return nil, err
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}
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return &oidc.AccessTokenResponse{
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AccessToken: accessToken,
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TokenType: oidc.BearerToken,
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ExpiresIn: uint64(validity.Seconds()),
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}, nil
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}
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