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shankar0123
d60a0ac297
Bundle 1 closure (2026-05-12 acquisition diligence audit). Closes the
acquisition-blocker chain: target.edit (default r-operator grant per
migrations/000029_rbac.up.sql:196) → arbitrary reload_command stored
without validation → agent createTargetConnector json.Unmarshal-only
→ sh -c on agent host. README's 'shell injection prevention on all
connector scripts' claim is now true at the chain level.
Server-side: new internal/connector/target/configcheck package + a
configcheck.Validate call in target.go::Create + ::Update +
::CreateTarget + ::UpdateTarget (all 4 entry points). Rejects shell
metacharacters in reload_command / validate_command / restart_command
for nginx, apache, haproxy, postfix/dovecot, javakeystore, ssh. Sentinel
errors.Is(err, service.ErrInvalidConnectorConfig) available for handler
400 mapping. Non-shell connector types (F5, IIS, Caddy, Traefik, Envoy,
cloud targets, K8s) are no-ops by design.
Agent-side: defense-in-depth connector.ValidateConfig(ctx, configJSON)
call in cmd/agent/main.go inserted between createTargetConnector and
DeployCertificate. This catches (a) configs pre-dating the server gate,
(b) encrypted-blob tampering, (c) per-connector filesystem invariants
that the server can't check.
F5 (S2 finding): proven docs-vs-code drift, not a security bug. The
applyDefaults function never set Insecure=true; runtime default has
always been Go zero-value (false → TLS verified). Three lying 'default
true' comments in f5/f5.go (lines 30, 45-47, 126) rewritten to match
actual code behavior.
Docs (C4 + C9): README L12 + L68 narrowed — 'any CA / any server' →
'Twelve native CA connectors plus an OpenSSL adapter; fifteen native
deployment-target connectors plus a proxy-agent pattern.' 'Every deploy
goes through atomic-write + ...' narrowed to file-based connectors with
inline link to per-target guarantee matrix. New deployment-model.md §1.6
ships a 15-target × 8-property guarantee table covering atomic write /
owner-perms / SHA-256 idempotency / pre-deploy snapshot / on-failure
rollback / post-deploy TLS verify / Prometheus counters / shell-injection
validation — including the K8s preview honesty marker (CLAIM-H4).
Tests: internal/connector/target/configcheck/configcheck_test.go covers
14 shell-injection payloads (semicolon, pipe, backtick, dollar-paren,
redirect, and-chain, newline, double-quote, escape, dollar-var) × 7
shell-using connectors + benign-command acceptance + non-shell no-op
behavior + empty config + malformed JSON. All pass.
Verification (run from /sessions/gifted-blissful-pasteur/mnt/cowork/certctl):
go fmt ./... # clean (no diffs)
go vet ./... # clean (no findings)
go test -short -count=1 ./internal/... ./cmd/...
# 60+ packages all ok, zero FAIL
Audit-Closes: BUNDLE-1 RT-C1 SEC-M4 CLAIM-M2 CLAIM-L3
Audit-Verifies-False: S2 (F5 'default insecure' was a comment lie, code was always secure)