steveandClaude Opus 4.8
84edf3e42a
OIDC is pansy's primary login path (Authentik the target IdP); local auth (#4) remains the fallback and both issue the same session cookie. - deps: github.com/coreos/go-oidc/v3 + golang.org/x/oauth2 (both pure Go; CGO stays off). - api/oidc.go: lazy issuer discovery (retried per-request, never crashes a server that also serves local auth), GET /auth/oidc/login builds an authorization-code URL with PKCE S256 + random state + nonce stashed in a short-lived HttpOnly cookie, GET /auth/oidc/callback verifies state (constant-time), exchanges the code with the PKCE verifier, verifies the ID token + nonce, and starts a pansy session. Failures redirect to /login?error=... ; success to /gardens. - service.LoginOIDC: (issuer,subject) match -> login; else *verified* email match -> link onto the existing account; else JIT-create (the IdP gates access, so PANSY_REGISTRATION doesn't apply). Unverified email colliding with an existing account is refused (takeover guard); no email is refused (email is the account key). Reuses the atomic CreateUser. - store: GetUserByOIDC + LinkOIDC (unique-pair backstop). - config: OIDCReady() (needs issuer+client+BaseURL for the redirect URI); /auth/providers now reports oidc from it and defaults the button label to "Sign in with Authentik". OIDC routes are only registered when ready, so an unconfigured instance 404s them. - PANSY_LOCAL_AUTH=false rejects/hides local auth but not OIDC. Tests: service provisioning (JIT, repeat login, link, unverified-collision refusal, no-email, name fallback, works with local auth off); api (routes-absent-when-unconfigured, providers reporting, login redirect with PKCE params + tx cookie via a fake discovery server, callback state/error paths). Smoke-tested: unreachable issuer degrades to error=oidc_unavailable with the server still up and local auth working. Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]> Claude-Session: https://claude.ai/code/session_01JdQpdYYsTgtkJBxbcpAszi