Replaces the shared GITEA_MCP_DEFAULT_TOKEN for all callers. When a
request's bearer validates directly against Gitea's own /api/v1/user,
that token is used for every upstream call this request makes instead
of the service PAT, and the caller identity comes from Gitea's own
login rather than the proxy header. Any other bearer (static token,
JWT, none) falls through unchanged to the existing chassis auth.
Prep: Authentik now SSOs into Gitea (infra a32801c), so each real user
can mint their own PAT from their own linked account.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
CallerMiddleware silently preferred X-Auth-Request-User over X-Forwarded-User
with no explanation and no signal when both were set. Documented the precedence
(X-Auth-Request-User is the verified OIDC identity oauth2-proxy sets, so it is
authoritative; X-Forwarded-User is a fallback), and it now takes a *slog.Logger
and warns when both headers are present and disagree, so a proxy
misconfiguration is visible instead of silently resolved. Table-driven tests
cover precedence (both/single/none) and the conflict-warning path.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Gitea host renamed (infra ADR-0004); the mcp-chassis dep already migrated
(3329ff3), so the sequencing gate is clear. `go mod edit -module` + bulk import
rewrite across all .go files. gitea-mcp is a server binary (not an imported
library), so no downstream consumers break. build + task check green.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
First real port of the MCP chassis library — abort-criterion check for
spike S3 of the 2026-05 homelab architecture review.
Changes:
- Drop internal/auth/jwt.go (~79 LOC) — chassis provides JWTValidator
with identical signature.
- Drop internal/auth/bearer.go (~42 LOC) — chassis BearerMiddleware
has the same static-or-JWT semantics plus an optional WWW-Authenticate
resource_metadata challenge (consumed via new resourceMetadataURL arg).
- Drop internal/auth/bearer_test.go — same scenarios are covered in
the chassis bearer_test.go now.
- main.go: import chassis as `chassisauth`, build resourceMetadataURL
only when both DexIssuerURL + MCPResourceURL are set, replace the
inline /.well-known/oauth-protected-resource handler with the chassis
ProtectedResourceHandler.
internal/auth/caller.go (oauth2-proxy header → context) stays — chassis
out-of-scope.
Net LOC change: -~150 LOC duplicated infra + a 5-LOC import.
go.mod gains gitea.d-ma.be/mathias/mcp-chassis v0.1.0 (jwx/v2 + testify
already transitive, no new top-level deps).
Verifies abort criterion: one PR, one binary's worth of port, task check
green (lint + test + vet + govulncheck clean). Per the S3 spike spec,
this clears the chassis to continue. Next port: hyperguild/ingestion
(brain-mcp), filed as a follow-up.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Previously BearerMiddleware allowed requests with no Authorization
header to pass through whenever GITEA_MCP_DEFAULT_TOKEN was set. The
intent was "fall back to the service PAT for upstream Gitea calls,"
but the side effect was that anyone could hit /mcp anonymously and the
server would happily proxy requests as the service account.
Drop that path. Auth on /mcp now requires either:
- a valid Dex-issued JWT, or
- a Bearer matching GITEA_MCP_STATIC_TOKEN.
The Gitea service PAT (GITEA_MCP_DEFAULT_TOKEN) is no longer wired
into BearerMiddleware at all — it stays an upstream-client concern,
used by gitea.NewClient for outbound API calls only. This decouples
"can this caller invoke a tool" from "what credentials does the tool
use against Gitea".
Tests updated: drop the NoAuthHeader_WithDefault permissive case, add
NoAuthHeader_RejectsEvenWhenStaticConfigured to lock in the new
behavior.
Closes part of mathias/infra#2.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
- internal/auth/jwt.go: JWTValidator via lestrrat-go/jwx/v2, JWKS auto-refresh
- internal/auth/bearer.go: replace Gitea PAT validation with JWT->static->default chain
- internal/gitea/client.go: always use service PAT; remove TokenFromContext lookup
- internal/config/config.go: add DexIssuerURL, MCPAudience, MCPResourceURL, StaticToken
- cmd/gitea-mcp/main.go: wire validator, fix /.well-known to return real AS list
- bearer_test.go: rewrite for new API
claude.ai connectors call the server with no Authorization header (confirmed
via request logging). Add a configurable default Gitea PAT so unauthenticated
clients (like claude.ai) can still reach the server.
Claude Code continues to pass per-request PATs; defaultToken="" preserves
the existing strict behaviour when the env var is unset.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Callers now supply their own Gitea PAT as a Bearer token; the server validates
it against GET /api/v1/user and threads it through context to all downstream
Gitea API calls. GITEA_API_TOKEN env var and the GiteaAPIToken config field are
removed.
mathiasandClaude Sonnet 5