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shankar0123
40fd96a416
Production hardening II Phase 2 — closes the per-request live-signing
bottleneck for OCSP. Mirrors the existing crl_cache pattern (migration
000019 / internal/service/crl_cache.go) but per (issuer_id, serial_hex)
instead of per-issuer.
LOAD-BEARING SECURITY INVARIANT: a revoked cert MUST NOT continue to
return the stale 'good' cached response after revocation. The
RevocationSvc.RevokeCertificateWithActor flow now calls
OCSPResponseCacheService.InvalidateOnRevoke after a successful revoke
so the next OCSP fetch falls through to live signing and returns the
revoked status. Pinned by TestOCSPCache_InvalidateOnRevoke_NextFetchReturnsRevoked.
NEW migrations/000024_ocsp_response_cache.{up,down}.sql with composite
PK (issuer_id, serial_hex), nullable revocation_reason / revoked_at,
next_update index for the scheduler refresh loop, issuer_id index for
admin observability.
NEW internal/domain/ocsp_response_cache.go::OCSPResponseCacheEntry +
IsStale helper.
NEW internal/repository/postgres/ocsp_response_cache.go implementing
repository.OCSPResponseCacheRepository (Get / Put / Delete /
CountByIssuer). Interface defined in internal/repository/interfaces.go.
NEW internal/service/ocsp_response_cache.go::OCSPResponseCacheService
with read-through facade + sync.Map singleflight + InvalidateOnRevoke.
On cache miss, calls caOperationsSvc.LiveSignOCSPResponse(nil) — the
NEW bypass-cache entry point — to break the cyclic dependency between
cache and CAOps.
REFACTORED internal/service/ca_operations.go:
- GetOCSPResponseWithNonce now dispatches: nil-nonce + cache wired
→ cacheSvc.Get (cache); nonce != nil OR cache nil → live-sign.
- LiveSignOCSPResponse is the new exported bypass-cache entry point;
contains the body of what was previously the GetOCSPResponse-
With-Nonce path.
- SetOCSPCacheSvc + new OCSPResponseCacher interface (cyclic-dep
break + test-injectable).
The cache stores nil-nonce blobs by design. Nonce-bearing requests
always live-sign because re-signing to add a nonce defeats caching;
this is a deliberate tradeoff — most relying parties don't send
nonces (Apple Push, Microsoft Edge SmartScreen, Firefox), and the
minority that do already accept the extra round-trip cost for replay
protection.
WIRED in cmd/server/main.go alongside the existing CRL cache wire:
ocspResponseCacheRepo + ocspResponseCacheService + SetOCSPCacheSvc +
SetOCSPCacheInvalidator. Existing deploys see no behavior change
(cache is consulted but on every cold-start the first fetch lands
through the live-sign + write-back path).
NOT YET WIRED in this commit (deferred to next phase commit to keep
this one shippable):
- Scheduler ocspCacheRefreshLoop (the warm-on-startup + N-hourly
refresh loop). The cache works without it; entries just live-sign
on miss + cache hit thereafter, so cold caches warm up
organically as relying parties query.
- Admin observability endpoint /api/v1/admin/ocsp/cache.
- CERTCTL_OCSP_CACHE_REFRESH_INTERVAL env var.
These three are the visible-but-not-load-bearing wires; the security
invariant (no stale-good-after-revoke) is fully shipped here.
7 new tests in internal/service/ocsp_response_cache_test.go pin every
documented invariant, with TestOCSPCache_InvalidateOnRevoke_NextFetch
ReturnsRevoked called out as the load-bearing security test.
Pre-commit verification: go build ./... clean; go test -short -count=1
green for service/ + handler/ + connector/issuer/local/.