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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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2
pkg/server/api/mcp/v1/v1_handler.go
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@@ -86,7 +86,7 @@ func NewMux(
r := chi.NewMux()
r.Use(authn.NewAPIKeyMiddleware(iamSvc, tokenSecret))
r.Use(authn.NewOAuth2AccessTokenMiddleware(iamSvc))
r.Use(authn.NewIdentityPresenceMiddleware())
r.Use(authn.NewIdentityPresenceMiddleware(baseURL))
r.Handle("/", protectedHandler)
logger.Info("MCP server initialized successfully")