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package handlers
import (
"encoding/json"
"fmt"
"net/http"
"time"
oauthelia2 "authelia.com/provider/oauth2"
"authelia.com/provider/oauth2/token/jwt"
"authelia.com/provider/oauth2/x/errorsx"
"github.com/google/uuid"
"github.com/pkg/errors"
"github.com/valyala/fasthttp"
"github.com/authelia/authelia/v4/internal/middlewares"
"github.com/authelia/authelia/v4/internal/oidc"
)
// OpenIDConnectUserinfo handles GET/POST requests to the OpenID Connect 1.0 UserInfo endpoint.
//
// https://openid.net/specs/openid-connect-core-1_0.html#UserInfo
func OpenIDConnectUserinfo(ctx *middlewares.AutheliaCtx, rw http.ResponseWriter, r *http.Request) {
var (
requestID uuid.UUID
tokenType oauthelia2.TokenType
requester oauthelia2.AccessRequester
client oidc.Client
err error
)
if requestID, err = uuid.NewRandom(); err != nil {
errorsx.WriteJSONError(rw, r, oauthelia2.ErrServerError)
return
}
oidcSession := oidc.NewSession()
ctx.Logger.Debugf("User Info Request with id '%s' is being processed", requestID)
if tokenType, requester, err = ctx.Providers.OpenIDConnect.IntrospectToken(r.Context(), oauthelia2.AccessTokenFromRequest(r), oauthelia2.AccessToken, oidcSession); err != nil {
ctx.Logger.Errorf("User Info Request with id '%s' failed with error: %s", requestID, oauthelia2.ErrorToDebugRFC6749Error(err))
if rfc := oauthelia2.ErrorToRFC6749Error(err); rfc.StatusCode() == http.StatusUnauthorized {
rw.Header().Set(fasthttp.HeaderWWWAuthenticate, fmt.Sprintf(`Bearer %s`, oidc.RFC6750Header("", "", rfc)))
}
errorsx.WriteJSONError(rw, r, err)
return
}
if tokenType != oauthelia2.AccessToken {
ctx.Logger.Errorf("User Info Request with id '%s' on client with id '%s' failed with error: bearer authorization failed as the token is not an access token", requestID, client.GetID())
errStr := "Only access tokens are allowed in the authorization header."
rw.Header().Set(fasthttp.HeaderWWWAuthenticate, fmt.Sprintf(`Bearer error="invalid_token",error_description="%s"`, errStr))
errorsx.WriteJSONErrorCode(rw, r, http.StatusUnauthorized, errors.New(errStr))
return
}
if client, err = ctx.Providers.OpenIDConnect.GetRegisteredClient(ctx, requester.GetClient().GetID()); err != nil {
ctx.Logger.Errorf("User Info Request with id '%s' on client with id '%s' failed to retrieve client configuration with error: %s", requestID, client.GetID(), oauthelia2.ErrorToDebugRFC6749Error(err))
errorsx.WriteJSONError(rw, r, err)
return
}
var (
original map[string]any
requests map[string]*oidc.ClaimRequest
claimsGranted oauthelia2.Arguments
userinfo bool
)
switch session := requester.GetSession().(type) {
case *oidc.Session:
original = session.IDTokenClaims().ToMap()
requests = session.ClaimRequests.GetUserInfoRequests()
userinfo = !session.ClientCredentials
claimsGranted = session.GrantedClaims
default:
ctx.Logger.Errorf("User Info Request with id '%s' on client with id '%s' failed to handle session with type '%T'", requestID, client.GetID(), session)
errorsx.WriteJSONError(rw, r, oauthelia2.ErrServerError.WithDebugf("Failed to handle session with type '%T'.", session))
return
}
claims := jwt.MapClaims{}
var detailer oidc.UserDetailer
if detailer, err = oidcDetailerFromClaims(ctx, original); err != nil {
if err = client.GetClaimsStrategy().PopulateClientCredentialsUserInfoClaims(ctx, client, original, claims); err != nil {
ctx.Logger.WithError(err).Errorf("User Info Request with id '%s' on client with id '%s' failed due to an error populating claims for the client credentials flow", requestID, client.GetID())
errorsx.WriteJSONError(rw, r, oauthelia2.ErrServerError.WithDebugf("Error occurred populating claims for the client credentials flow: %v.", err))
return
}
if userinfo {
ctx.Logger.WithError(err).Errorf("User Info Request with id '%s' on client with id '%s' error occurred loading user information", requestID, client.GetID())
}
} else if err = client.GetClaimsStrategy().PopulateUserInfoClaims(ctx, ctx.Providers.OpenIDConnect.GetScopeStrategy(ctx), client, requester.GetGrantedScopes(), claimsGranted, requests, detailer, ctx.Clock.Now(), original, claims); err != nil {
ctx.Logger.WithError(err).Errorf("User Info Request with id '%s' on client with id '%s' failed due to an error populating claims for the standard flow", requestID, client.GetID())
errorsx.WriteJSONError(rw, r, oauthelia2.ErrServerError.WithDebugf("Error occurred populating claims for the standard flow: %v.", err))
return
}
var token string
ctx.Logger.Tracef("User Info Response with id '%s' on client with id '%s' is being sent with the following claims: %+v", requestID, requester.GetClient().GetID(), claims)
switch alg := client.GetUserinfoSignedResponseAlg(); alg {
case oidc.SigningAlgNone:
ctx.Logger.Debugf("User Info Request with id '%s' on client with id '%s' is being returned unsigned as per the registered client configuration", requestID, client.GetID())
rw.Header().Set(fasthttp.HeaderContentType, "application/json; charset=utf-8")
rw.Header().Set(fasthttp.HeaderCacheControl, "no-store")
rw.Header().Set(fasthttp.HeaderPragma, "no-cache")
rw.WriteHeader(http.StatusOK)
_ = json.NewEncoder(rw).Encode(claims)
default:
jwtClient := oidc.NewUserinfoClient(client)
ctx.Logger.Debugf("User Info Request with id '%s' on client with id '%s' is being returned signed as per the registered client configuration with key id '%s' using the '%s' algorithm", requestID, client.GetID(), jwtClient.GetSigningKeyID(), jwtClient.GetSigningAlg())
var jti uuid.UUID
if jti, err = uuid.NewRandom(); err != nil {
ctx.Logger.WithError(err).Errorf("User Info Request with id '%s' on client with id '%s' failed due to an error generating a JTI for the JWT response", requestID, client.GetID())
errorsx.WriteJSONError(rw, r, oauthelia2.ErrServerError.WithHint("Could not generate JTI."))
return
}
claims[oidc.ClaimJWTID] = jti.String()
claims[oidc.ClaimIssuedAt] = time.Now().UTC().Unix()
strategy := ctx.Providers.OpenIDConnect.GetJWTStrategy(ctx)
if token, _, err = strategy.Encode(ctx, claims, jwt.WithClient(jwtClient)); err != nil {
errorsx.WriteJSONError(rw, r, err)
return
}
rw.Header().Set(fasthttp.HeaderContentType, "application/jwt; charset=utf-8")
rw.Header().Set(fasthttp.HeaderCacheControl, "no-store")
rw.Header().Set(fasthttp.HeaderPragma, "no-cache")
rw.WriteHeader(http.StatusOK)
_, _ = rw.Write([]byte(token))
}
ctx.Logger.Debugf("User Info Request with id '%s' on client with id '%s' was successfully processed", requestID, client.GetID())
}
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