Complete and refine OAuth + Traeffik Restriction

infrastructure/auth_connector/auth_connector.go

@@ -27,8 +27,12 @@ type AuthConnector interface {
 	RevokeToken(token string, clientID string) error
 	RefreshToken(refreshToken string, clientID string) (*TokenResponse, error)
 
-	// Forward auth
-	CheckAuthForward(reqToken string, publicKey string, host string, method string, forward string, external bool) bool
+	// CheckAuthForward validates the token and permissions for a forward auth request.
+	// Returns an HTTP status code:
+	//   200 — token active and permissions granted
+	//   401 — token missing, invalid, or inactive → caller should redirect to login
+	//   403 — token valid but permissions denied → caller should return forbidden
+	CheckAuthForward(reqToken string, publicKey string, host string, method string, forward string, external bool) int
 }
 
 // Token is the unified token response returned to clients

infrastructure/auth_connector/hydra_connector.go

@@ -299,61 +299,61 @@ func (h *HydraConnector) RefreshToken(refreshToken string, clientID string) (*To
 	return &result, nil
 }
 
-// CheckAuthForward validates a JWT token for forward auth (Traefik integration)
-// It introspects the token via Hydra and checks permissions from the token's extra claims
-func (h *HydraConnector) CheckAuthForward(reqToken string, publicKey string, host string, method string, forward string, external bool) bool {
+// CheckAuthForward validates a JWT token for forward auth (Traefik integration).
+// It introspects the token via Hydra then checks permissions via Keto.
+// Only requests from our own peer (external == false) are accepted.
+// Returns 200 (OK), 401 (token inactive/invalid → redirect to login), or 403 (permission denied).
+func (h *HydraConnector) CheckAuthForward(reqToken string, publicKey string, host string, method string, forward string, external bool) int {
 	if forward == "" || method == "" {
-		return false
+		return http.StatusUnauthorized
+	}
+	// Defense in depth: only SELF peer requests are allowed.
+	if external {
+		return http.StatusUnauthorized
 	}
 	logger := oclib.GetLogger()
 
-	// Introspect the token via Hydra to get claims
+	// Introspect the token via Hydra.
+	// An inactive or invalid token means the user must re-authenticate → 401.
 	result, err := h.Introspect(reqToken)
 	if err != nil || !result.Active {
 		if err != nil {
 			logger.Error().Msg("Forward auth introspect failed: " + err.Error())
 		}
-		return false
+		return http.StatusUnauthorized
 	}
 
-	// Extract claims from the introspection result's extra data
-	// Hydra puts consent session's access_token data in the "ext" field of introspection
+	// Build session claims from Hydra's introspection "ext" field.
+	// Hydra injects the consent session's access_token data there.
 	var sessionClaims claims.Claims
+	sessionClaims.Session.AccessToken = make(map[string]interface{})
+	sessionClaims.Session.IDToken = make(map[string]interface{})
 	if result.Extra != nil {
-		sessionClaims.Session.AccessToken = make(map[string]interface{})
-		sessionClaims.Session.IDToken = make(map[string]interface{})
 		for k, v := range result.Extra {
 			sessionClaims.Session.AccessToken[k] = v
 		}
 	}
 
-	// Also try to get id_token claims from the token if it's a JWT
-	// For now, use the introspected extra claims and the peer signature verification
-	if sessionClaims.Session.IDToken == nil {
-		sessionClaims.Session.IDToken = make(map[string]interface{})
-	}
-
-	// Get self peer for signature verification
+	// For SELF peer requests skip the signature check (internal traffic).
 	pp := oclib.NewRequest(oclib.LibDataEnum(oclib.PEER), "", "", []string{}, nil).Search(nil, fmt.Sprintf("%v", peer.SELF.EnumIndex()), false)
 	if len(pp.Data) > 0 {
 		p := pp.Data[0].(*peer.Peer)
-		// Re-sign for local verification if this is our own peer
-		if !external && p.PublicKey == publicKey {
+		if p.PublicKey == publicKey {
 			sessionClaims.Session.IDToken["signature"] = ""
-			// For internal requests, skip signature check by using the claims decoder directly
-			ok, err := claims.GetClaims().DecodeClaimsInToken(host, method, forward, sessionClaims, publicKey, external)
-			if err != nil {
-				logger.Error().Msg("Failed to decode claims: " + err.Error())
-			}
-			return ok
 		}
 	}
 
+	// Check permissions via Keto.
+	// A valid token with insufficient permissions → 403 (authenticated, not authorized).
 	ok, err := claims.GetClaims().DecodeClaimsInToken(host, method, forward, sessionClaims, publicKey, external)
 	if err != nil {
-		logger.Error().Msg("Failed to decode claims: " + err.Error())
+		logger.Error().Msg("Failed to decode claims in forward auth: " + err.Error())
+		return http.StatusForbidden
 	}
-	return ok
+	if !ok {
+		return http.StatusForbidden
+	}
+	return http.StatusOK
 }
 
 // extractBearerToken extracts the token from a "Bearer xxx" Authorization header value