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Patrick Buckley
20df7b3034
* feat: OIDC SSO authentication with PKCE, auto-provisioning, and role mapping Add OpenID Connect as a fourth authentication method, enabling single sign-on via any OIDC provider (Okta, Azure AD, Google, Keycloak). Opt-in via env vars (TURNSTONE_OIDC_ISSUER, CLIENT_ID, CLIENT_SECRET). Security: - Authorization Code Flow with PKCE (S256) - State/nonce parameters with database-backed pending store (multi-node safe) - JWKS signature validation with async fetch + key rotation retry - Algorithm allowlist from JWKS key (not token header) prevents confusion - Identity matching exclusively by (issuer, sub) — prevents account takeover - password_enabled=false enforced server-side, not just UI - Rate limiting on both authorize and callback endpoints - OIDC users get "!oidc" password sentinel (bcrypt rejects naturally) - ID token validated for iss, aud, exp, nonce Features: - Auto-provisioning with username deduplication on first login - Claim-based role mapping with IdP demotion propagation (revokes stale roles) - "Continue with [Provider]" SSO button on login page - OIDC-only mode hides password form - Setup wizard required before OIDC login (admin bootstrap) Storage: migration 018 (oidc_identities + oidc_pending_states tables), 8 new protocol methods on both SQLite and PostgreSQL backends. 66 new tests (2273 total). * fix: address PR #71 review feedback (18 items) Bugs fixed: - OIDC success redirect now fetches permissions via new /auth/whoami endpoint before completing login (fixes permission-gating in UI) - Remove double decodeURIComponent on oidc_error (URLSearchParams already decodes; extra call throws on stray %) - Authorize rate limiter returns redirect instead of JSON 429 (endpoint reached via browser navigation, not fetch) - Lazy JWKS fetch in callback when startup discovery failed (IdP recovery without restart) - Startup exception handlers now log with exc_info=True - PostgreSQL pop_oidc_pending_state uses DELETE...RETURNING for true atomicity (eliminates TOCTOU) Behavior: - New OIDC users without role mapping get builtin-viewer by default (assigned_by="oidc-default", not revoked by role sync) Documentation fixes: - Role mapping: sync semantics (add + revoke stale), not "additive only" - PASSWORD_ENABLED=false blocks ALL password logins including admin - Algorithm: asymmetric allowlist, not per-key derivation - PlantUML diagram updated for role revocation API spec fixes: - Removed error_codes=[302] from callback (302 is success redirect) - Added /auth/whoami to both server + console specs - Regenerated TypeScript SDK OpenAPI snapshots (23 + 51 paths) * fix: address PR #71 round 2 review feedback (10 items) Rate limiting: - Authorize endpoint now calls record() after check() so the rate limiter actually counts attempts (was a no-op before) OIDC resilience: - Split startup try/except: discovery failure disables OIDC, JWKS prefetch failure leaves OIDC enabled for lazy retry on first login - JWKS unavailable message changed to "temporarily unavailable" (was misleadingly "not configured") - create_oidc_pending_state raises on collision instead of OR IGNORE (prevents silent insert drop on state collision) - SQLite pop_oidc_pending_state uses BEGIN IMMEDIATE for write lock (eliminates TOCTOU race) Frontend: - OIDC error display deferred 300ms so showLogin()'s async status fetch doesn't clear it via _switchMode → _clearError API spec: - OIDC authorize/callback endpoints now declare response_code=302 - Added AuthWhoamiResponse Pydantic model for /auth/whoami - Regenerated TypeScript SDK OpenAPI snapshots Documentation: - Diagram: JWKS "cached at startup, refreshed on-demand" (was "hourly") - Added TODO(tech-debt) comments on Host header redirect_uri sites
