* docs(webhook): revise SHOC webhook contract and plan for post-migration reality
Branch re-cut on main 2026-07-23 (old base carried stale PR #99 commits).
Contract Rev 2026-07-23:
- Producer account corrected: seahaven-prod (011934824531); mgmt frozen
- Reconciliation backstop is the new procurement read API, not SyncController
- wo_status "unknown" is real; SHOC must map it (checklist item added)
- write_origin forward-compat note for phase-2 write-back echo suppression
- SyncVendorReplies retirement flagged (dead table, no vendor_reply event)
Plan updates:
- Account gate: seahaven-prod only; never enable streams on mgmt tables
- Emitter ships DARK (ESMs enabled=False); activation is a deliberate flip
after the SHOC receiver passes shared HMAC vectors
- Post-refactor conventions: common.py helpers, bundle-consistency AST pins,
pytest.ini --cov additions, consolidated test roots
- Dedicated-CMK rationale, secret-ARN handooff step, consumer audit refreshed
(slack-bot decommissioned), enum golden test, write_origin skip-branch test
* feat(webhook): SHOC WO webhook emitter — dark-ship streams, HMAC secret + rotation
Implements docs/shoc-webhook-plan.md Phases 1-5 (PR-2 of the SHOC
call-and-be-called effort). Everything ships DARK: both DynamoDB event
source mappings deploy enabled=False; activation is a deliberate
one-line follow-up PR gated on the SHOC receiver passing the shared
HMAC test vectors.
- Streams: NEW_AND_OLD_IMAGES on WorkOrders + WorkOrderComments
(in-place update, RETAIN + logical IDs untouched; no existing
consumers — verified live, neither table had a stream).
- workorder-shoc-emitter (Py3.12/ARM64): stream -> envelope ->
HMAC-signed POST per docs/shoc-webhook-contract.md; strict per-shard
ordering (parallelization 1, bisect off, retry until 24h age,
ReportBatchItemFailures); 429/5xx/timeout block the shard in order,
other 4xx park to workorder-shoc-emitter-rejected; ESM failures ->
workorder-shoc-emitter-failures (metadata; replay rebuilds from
DynamoDB). Echo guard skips write_origin=shoc-write-api.
- Secret workorder-ingest/shoc-webhook-hmac on a dedicated CMK
(alias workorder-ingest-shoc-webhook-kms); cross-account
GetSecretValue/DescribeSecret + kms:Decrypt granted to exactly
arn:aws:iam::396287094661:role/shoc-backend-dev. RemovalPolicy
DESTROY deliberately (machine-generated material; avoids the
fixed-name RETAIN-orphan deadlock).
- workorder-shoc-hmac-rotator: 30-day rotation, dual-key overlap,
64-hex keys, kid = UTC %Y-%m-%dT%H.
- Alarms (ALARM-only -> site-alerts): emitter errors/throttles/
duration + iterator-age (>=10 min) + failures/rejected queue
depth; rotator standard trio.
- scripts/replay_shoc_webhooks.py: dry-run-default operator replay
(rebuilds from tables, replay:true envelopes).
- Tests: 742 passing, 85.56% aggregate; golden HMAC vectors shared
with SHOC in docs/shoc-webhook-test-vectors.json (emitter + replay
signing pinned to identical vectors); bundle-consistency AST pins
for both new bundles.
- README: WO stack + webhook feed section, alarm table, runbooks;
removed stale seahaven-slack-bot consumer references.
* fix(webhook): kms:ViaService pins, https-only delivery, cross-account principal CI pin
GPT-4.1 cross-family review of the policy surface (no BLOCK): FIX applied
to the cross-account shoc-backend-dev Decrypt statement and both Lambda
role KMS grants (the key is only ever used via Secrets Manager); its
invariant-enforcement QUESTION answered durably with
tests/test_cross_account_principal_pin.py (any new foreign IAM principal
in cdk/ fails CI). Scanner mediums fixed: delivery.py and the replay
script now refuse non-https URLs (urllib follows file:// and http://).
SQS metadata-action and dynamodb:ListStreams NITs skipped: standard CDK
grant shapes; ListStreams has no resource-level scoping. The 4 gitleaks
HIGHs on docs/shoc-webhook-test-vectors.json are deliberate non-secrets
(shared receiver-verification vectors) suppressed machine-level with
justification.
* harden(webhook): resolve /sh-security-review findings (1 confirmed medium + cheap fixes)
High-recall detector fan-out (injection/authz/secrets-crypto/iac-iam/logic)
+ proof-or-kill verifier. Gate PASSES: 1 confirmed medium, 0 confirmed
critical/high. Confirmed finding fixed; several unverified-but-cheap
hardenings applied since the emitter ships dark and activation is weeks out.
- CONFIRMED medium (confused deputy): the rotation Lambda's generated
invoke permission for secretsmanager.amazonaws.com carried no
SourceAccount/SourceArn, so any account's Secrets Manager could invoke
the rotator. Patched the generated CfnPermission in place (a second
permission would be additive, not restrictive) to pin account + this
secret ARN.
- delivery + replay: refuse to follow receiver 3xx redirects (no-redirect
opener) so live X-SH-* auth headers can't be forwarded to a
receiver-chosen Location and an http:// Location can't slip past the
https guard. Fixed the "unfollowed 3xx" comment that was factually wrong.
- delivery: classify 401/403 as retryable (invalidate key cache + retry in
order) instead of parking -- transient auth failures (rotation outran the
TTL cache, clock skew) are availability events, not contract bugs.
- envelope: build_event now genuinely total (guarded eventID /
ApproximateCreationDateTime subscripts) per its own never-raise contract.
- handler: catch-all so an unexpected per-record error (e.g. SQS park
failure) reports only that record instead of failing the whole batch
(which would re-deliver every earlier success for 24h); per-invocation
emit/skip batch summary so a systemic silent drop is queryable/alarmable.
- rotator: narrow the AWSCURRENT-read except to ResourceNotFound/JSONDecode
(transient SM/KMS errors re-raise so the overlap key isn't silently
dropped); kid uniqueness checked against ALL retained kids with a random
suffix on collision (never reissue a kid for a different secret).
- contract: skeleton-upsert required on ANY unknown work_order_id (not just
comment-before-create) + monotonicity guard (ignore older updated_at), so
a parked created or an out-of-order replay can't corrupt receiver state.
Unverified/refuted findings left as-is with rationale: the two "high" logic
claims (whole-batch crash triggers, ordering violation) were refuted on
reachability (real stream records carry required fields; persistence writes
strings only; full-state idempotent upsert absorbs the ordering gap). Signed
kid/version binding (AUTHZ-002) declined: coordinated contract change, not
cheap, no exploit with one algorithm/key.
* fix(webhook): drop kid from rotator test_ok log (CodeQL clear-text-logging FP)
GHAS CodeQL flagged py/clear-text-logging-sensitive-data (high) at
_test_secret's success log because head["kid"] is subscripted from the
same parsed-secret dict that holds head["secret"] — the taint tracker
can't tell the non-secret key id from the secret. The secret value is
never logged. Rather than dismiss the alert (fragile; re-alerts on line
moves), remove the flow: kid is already logged at stage time in
_create_secret and version_id correlates the steps, so the test_ok log
keeps only event + version_id. Also hardens against a future edit that
swaps the logged field.
