Fixes NC PHP app (Astrolabe) OAuth integration by making token validation
more lenient for management API access.
Problem:
- Astrolabe calls Nextcloud OIDC token endpoint via internal URL (http://localhost)
- Tokens are issued with iss: http://localhost (internal)
- MCP server expects iss: http://localhost:8080 (external)
- Token validation failed with "Invalid issuer"
Solution:
- Add skip_issuer_check parameter to _verify_jwt_signature()
- verify_token_for_management_api() now skips both audience and issuer checks
- Security maintained: signature still verified, authorization checked by API
Also includes related fixes from previous session:
- Update test selectors for Vue 3 UI ("Enable Semantic Search")
- Fix OIDC discovery URL transformation in OAuthController.php
- Add overwrite.cli.url to setup hook for proper external URLs
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit fixes two OAuth issues in the Astrolabe app:
1. **Always use PKCE (RFC 9207)**:
- PKCE is now used for all OAuth flows (public and confidential clients)
- Previous code only used PKCE for public clients, causing failures
- Confidential clients now use both PKCE + client_secret (defense in depth)
- Nextcloud OIDC provider requires PKCE, so token exchange was failing
2. **Add token_broker to oauth_context**:
- Token broker is now stored in oauth_context for management API access
- Fixes "Token broker not configured" error when revoking access
- Revoke endpoint needs token_broker to delete refresh tokens and invalidate cache
Changes:
- OAuthController.php: Always generate PKCE verifier/challenge for all clients
- OAuthController.php: Always include code_verifier in token exchange
- app.py: Store token_broker in oauth_context after creation
Fixes:
- Astrolabe OAuth flow now works with Nextcloud OIDC
- Revoke/disconnect functionality now works in Astrolabe settings
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Chris Coutinho