- CRIT-1: Validate cert subjectUserId against grant.subjectUserId from DB;
use authoritative DB value in FederationContext
- CRIT-2: Add @Inject(GrantsService) decorator (tsx/esbuild requirement)
- HIGH-1: Validate UTF8String TLV tag, length, and bounds in OID parser
- HIGH-2: Collapse all 403 wire messages to a generic string to prevent
grant enumeration; keep internal logger detail
- HIGH-3: Assert federation wire envelope shape in all guard tests
- HIGH-4: Regression test for subjectUserId cert/DB mismatch
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Adds FederationAuthGuard that validates inbound mTLS client certs on
federation API routes. Extracts custom OIDs (grantId, subjectUserId),
loads the grant+peer from DB in one query, asserts active status, and
validates cert serial as defense-in-depth. Attaches FederationContext
to requests on success and uses federation wire-format error envelopes
(not raw NestJS exceptions) for 401/403 responses.
New files:
- apps/gateway/src/federation/oid.util.ts — shared OID extraction (no dupe ASN.1 logic)
- apps/gateway/src/federation/server/federation-auth.guard.ts — guard impl
- apps/gateway/src/federation/server/federation-context.ts — FederationContext type + module augment
- apps/gateway/src/federation/server/index.ts — barrel export
- apps/gateway/src/federation/server/__tests__/federation-auth.guard.spec.ts — 11 unit tests
Modified:
- apps/gateway/src/federation/grants.service.ts — adds getGrantWithPeer() with join
- apps/gateway/src/federation/federation.module.ts — registers FederationAuthGuard as provider
Closes#462
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
