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Add RFC 6750 WWW-Authenticate on OAuth bearer APIs

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Introduce BearerChallengeMiddleware on MCP, Console and Connect GraphQL, Files, and OAuth2 userinfo. Call sites record challenge intent in context via NoteUnauthenticated, NoteInvalidToken, and NoteInsufficientScope; the middleware applies resource_metadata, invalid_token, and insufficient_scope on WriteHeader.

OAuth2 access token middleware flags rejected Bearer tokens for invalid_token challenges. Add Authorizer.ScopesForAction for the scope auth-param.

Signed-off-by: Ludovic Vielle <ludovic@probo.com>
This commit is contained in:
Ludovic Vielle
2026-06-19 16:35:15 +02:00
parent b2e9b8b4f1
commit e424563794
18 changed files with 305 additions and 21 deletions
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6
pkg/server/api/connect/v1/oauth2_handler.go
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@@ -77,7 +77,7 @@ func (h *OAuth2Handler) BearerTokenMiddleware(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
tokenValue, err := bearertoken.Parse(r.Header.Get("Authorization"))
if err != nil {
w.Header().Set("WWW-Authenticate", `Bearer error="invalid_token"`)
bearertoken.SetBearerInvalidToken(w, h.baseURL)
http.Error(w, "unauthorized", http.StatusUnauthorized)
return
@@ -85,7 +85,7 @@ func (h *OAuth2Handler) BearerTokenMiddleware(next http.Handler) http.Handler {
accessToken, err := h.iam.OAuth2ServerService.LoadAccessToken(r.Context(), tokenValue)
if err != nil {
w.Header().Set("WWW-Authenticate", `Bearer error="invalid_token"`)
bearertoken.SetBearerInvalidToken(w, h.baseURL)
http.Error(w, "unauthorized", http.StatusUnauthorized)
return
@@ -402,7 +402,7 @@ func (h *OAuth2Handler) RegisterHandler(w http.ResponseWriter, r *http.Request)
func (h *OAuth2Handler) UserInfoHandler(w http.ResponseWriter, r *http.Request) {
accessToken, ok := oauth2.AccessTokenFromContext(r.Context())
if !ok {
w.Header().Set("WWW-Authenticate", `Bearer error="invalid_token"`)
bearertoken.SetBearerInvalidToken(w, h.baseURL)
http.Error(w, "unauthorized", http.StatusUnauthorized)
return