Files
acdl/platform/separation_of_duties.py
T
Jon Chery 6ed93f0311 phase: 7, status: plan-as-execute, persona: security-engineer, task: T-7.4..T-7.8
---ci---
project: acdl
phase: 7
milestone: v1.1
status: plan-as-execute
persona: security-engineer
task: [T-7.4, T-7.5, T-7.6, T-7.7, T-7.8]
requirements.covered: [REQ-18, REQ-20, REQ-21]
---/ci---

Wave 3 (security-engineer, 5 files sequential):

- T-7.4: schemas/policy_check_result.schema.json (REQ-18 schema half) —
  canonical shape from ARCHITECTURE.md §12.6; engine enum
  [checkov,kyverno,opa]; severity enum [critical,high,medium,low,info];
  result enum [pass,fail,skipped,error]. Validates as Draft 2020-12;
  valid instance validates.

- T-7.5: adapters/terraform/policy/checkov_adapter.py (REQ-18 adapter
  half) — Checkov JSON -> PolicyCheckResult; RULE_MAP has all 11 Checkov
  rule IDs (CKV_AWS_41/45/46/20/57/24/25/1/40/7/33) mapped to the 4 L2
  checks + tag/naming; emits ACDL_TAG_NAMING SKIPPED per D-043; stdlib
  only; tolerates both Checkov JSON shapes. Synthetic fixture produces 3
  records all valid against the schema.

- T-7.6: platform/audit_ledger_design.md (REQ-20) — three tiers (S3
  Object Lock compliance 7yr, acdl-evidence hot index, DynamoDB outbox
  RPO=0); spike scope (D-041) = hash chain + outbox write; v1.2 build-out
  = Object Lock + JWS (KMS key, quarterly rotation) + async worker + DLQ
  + daily checkpoints. Outbox item shape, RPO/RTO table, decision trail.

- T-7.7: platform/hitl_matrix_design.md (REQ-21 design half) —
  pre-execution gate model; Gitea-specific mechanics (workflow_dispatch +
  gitea.actor per D-042, no Environments API); full 8-concern matrix
  verbatim from §10.4; timeout 1d warn / 2d freeze; rejection -> HELD +
  supersedes; CODEOWNERS routing; SoD pointer to the .py.

- T-7.8: platform/separation_of_duties.py (REQ-21 impl half) —
  check(outbox_client, contract_id, current_prod_approver) -> (ok,
  reason); None outbox -> no-op; equal -> SEPARATION_OF_DUTIES_VIOLATION;
  distinct -> ok; route_halt_artifact stub; stdlib only (duck-typed
  outbox_client). All 5 SoD cases verified.
2026-07-21 18:45:28 +00:00

42 lines
1.8 KiB
Python

"""Check that qaApprover != prodApprover for a contract (ARCHITECTURE.md
§10.3, D-042). Reads `approver_qa` from the DynamoDB outbox for the
contractId, compares to the prod-dispatch `gitea.actor`. Blocks on
equality, emits `SEPARATION_OF_DUTIES_VIOLATION`, routes a halt artifact
to SRE on-call.
Spike scope (A-8.1): the spike is dev-only (REQ-27 contract has
environment: dev); HITL is not exercised. This module is authored to its
full v1.2 shape but the spike calls it with current_prod_approver=None
and a None outbox_client — the check returns (True, 'no QA approver
recorded (dev-only spike)').
"""
from typing import Optional, Tuple
def check(outbox_client, contract_id: str,
current_prod_approver: Optional[str]) -> Tuple[bool, str]:
"""Return (ok, reason). ok=False means block the prod promotion."""
if outbox_client is None:
return (True, "no outbox client (dev-only spike)")
item = outbox_client.get(contract_id)
if item is None:
return (True, "no prior approver (first promotion)")
qa_approver = item.get("approver_qa")
if not qa_approver:
return (True, "no QA approver recorded (dev-only spike)")
if current_prod_approver is None:
return (True, "no prod approver supplied (dev-only spike)")
if qa_approver == current_prod_approver:
return (False,
f"SEPARATION_OF_DUTIES_VIOLATION: "
f"qaApprover==prodApprover=={qa_approver}")
return (True, "distinct")
def route_halt_artifact(contract_id: str, violation_reason: str,
oncall_client) -> None:
"""Route a halt artifact to SRE on-call. Spike: stub that logs. v1.2
wires a real pager."""
print(f"[halt-artifact] contract={contract_id} reason={violation_reason} "
f"oncall={oncall_client}", flush=True)