Files
tapir/go.mod
T
mathiasandClaude Opus 4.8 57c06e5a12 feat(web): implement Dex OIDC auth (web.Auth) with single-user allowlist
Adds internal/web/oidc.DexAuth, the production web.Auth impl behind the seam
(ADR-011, docs/ui-spec.md §6). Standard Authorization Code flow against Dex:

- Routes() mounts /auth/login (state+nonce, redirect to authorize),
  /auth/callback (code exchange, ID-token verify, nonce check, allowlist:
  sub must equal Config.AllowedSubject else 403, set session, redirect /),
  /auth/logout (clear session).
- Middleware redirects unauthenticated requests to /auth/login, slides the
  session expiry on each authenticated request; /healthz and /auth/* bypass.
- CurrentUser resolves the principal from the session cookie.
- Sessions: server-side in-memory store (single Stage-0 replica) keyed by an
  HMAC-SHA256 (HS256) signed, HttpOnly, Secure, SameSite=Lax cookie with a
  short TTL + sliding refresh. State->nonce pending map is one-time + expiring
  (replay/CSRF defense). Tokens are never logged.

Constructor New(ctx, Config, ...Option); the six-field Config (Issuer,
ClientID, ClientSecret, RedirectURL, SessionSecret, AllowedSubject) is what
cmd/tapir wires from TAPIR_OIDC_*/TAPIR_DEX_*/TAPIR_SESSION_SECRET/
TAPIR_ALLOWED_SUBJECT. Options (clock, TTL, insecure cookies) are test-only.

Tests use a fake OIDC issuer via httptest (discovery + JWKS + token endpoint
signing an RS256 ID token) — no live Dex: login 302s to authorize; callback
for the allowlisted sub sets a session and 302s to /; non-allowlisted sub 403;
middleware redirects unauthenticated and passes authenticated; logout clears;
plus expiry, tampered-cookie, and unknown-state cases.

Deps (per ADR-006 / ui-spec §6): adds github.com/coreos/go-oidc/v3 — the
homelab-standard OIDC lib, small, handles discovery + JWKS + ID-token
verification; pairs with the already-present golang.org/x/oauth2. go-jose/v4
(transitive via go-oidc) is used directly only in tests to sign the fake
issuer's tokens.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-02 23:46:20 +02:00

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AMPL

module gitea.d-ma.be/mathias/tapir
go 1.25.0
require (
github.com/coreos/go-oidc/v3 v3.18.0
github.com/fergusstrange/embedded-postgres v1.34.0
github.com/go-jose/go-jose/v4 v4.1.4
github.com/golang-migrate/migrate/v4 v4.19.1
github.com/jackc/pgx/v5 v5.9.2
github.com/stretchr/testify v1.11.1
golang.org/x/oauth2 v0.36.0
)
require (
github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
github.com/jackc/pgerrcode v0.0.0-20220416144525-469b46aa5efa // indirect
github.com/jackc/pgpassfile v1.0.0 // indirect
github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 // indirect
github.com/jackc/puddle/v2 v2.2.2 // indirect
github.com/lib/pq v1.10.9 // indirect
github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
github.com/rogpeppe/go-internal v1.15.0 // indirect
github.com/xi2/xz v0.0.0-20171230120015-48954b6210f8 // indirect
golang.org/x/sync v0.18.0 // indirect
golang.org/x/text v0.31.0 // indirect
gopkg.in/yaml.v3 v3.0.1 // indirect
)