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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/.
53 lines
2.6 KiB
SQL
53 lines
2.6 KiB
SQL
-- 000024_ocsp_response_cache.up.sql
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--
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-- Production hardening II Phase 2: pre-signed OCSP response cache.
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--
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-- Mirrors the crl_cache pattern from migration 000019 — same
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-- read-through facade, same scheduler-driven refresh — but per
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-- (issuer_id, serial) instead of per-issuer. Without this cache, every
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-- inbound OCSP request triggers a fresh signature with the dedicated
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-- responder cert, which becomes the bottleneck for high-volume relying
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-- parties (Apple Push, Microsoft Edge SmartScreen, etc.).
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--
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-- After this migration the scheduler's ocspCacheRefreshLoop pre-signs
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-- responses for every active (issuer_id, serial) at a configurable
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-- interval (default 1h, env var CERTCTL_OCSP_CACHE_REFRESH_INTERVAL),
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-- and CAOperationsSvc.GetOCSPResponseWithNonce reads from the cache
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-- on the hot path. On cache miss the service falls back to live
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-- signing AND writes the result back to the cache (read-through).
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--
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-- LOAD-BEARING SECURITY INVARIANT: the revocation service MUST call
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-- OCSPResponseCacheService.InvalidateOnRevoke after a successful
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-- revoke. Without that wire, a revoked cert keeps returning the
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-- stale "good" response from cache until the next scheduler tick —
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-- a security incident. The Phase 2 prompt's frozen decision 0.4
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-- mandates this.
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--
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-- Idempotent: every CREATE uses IF NOT EXISTS so re-running the
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-- migration is safe (matches the project's migration convention).
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CREATE TABLE IF NOT EXISTS ocsp_response_cache (
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issuer_id TEXT NOT NULL REFERENCES issuers(id) ON DELETE CASCADE,
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serial_hex TEXT NOT NULL,
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response_der BYTEA NOT NULL,
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cert_status TEXT NOT NULL, -- 'good' | 'revoked' | 'unknown'
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revocation_reason INTEGER, -- nullable; set only when cert_status='revoked'
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revoked_at TIMESTAMPTZ, -- nullable; set only when cert_status='revoked'
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this_update TIMESTAMPTZ NOT NULL,
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next_update TIMESTAMPTZ NOT NULL,
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generated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
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PRIMARY KEY (issuer_id, serial_hex)
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);
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-- Lets the scheduler refresh loop quickly identify entries whose
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-- next_update has fallen behind the current time. Runs at every
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-- ocspCacheRefreshLoop tick.
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CREATE INDEX IF NOT EXISTS idx_ocsp_response_cache_next_update
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ON ocsp_response_cache(next_update);
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-- Lets the admin observability endpoint efficiently list per-issuer
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-- entries for the GUI cache stats panel (Phase 8 wires this into the
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-- AdminCRLCacheHandler-equivalent).
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CREATE INDEX IF NOT EXISTS idx_ocsp_response_cache_issuer
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ON ocsp_response_cache(issuer_id);
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