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- Introduced DigestUpsertRequest for handling digest upsert requests with properties like ChannelId, Recipient, DigestKey, Events, and CollectUntil. - Created LockEntity to represent a lightweight distributed lock entry with properties such as Id, TenantId, Resource, Owner, ExpiresAt, and CreatedAt. feat: Implement ILockRepository interface and LockRepository class - Defined ILockRepository interface with methods for acquiring and releasing locks. - Implemented LockRepository class with methods to try acquiring a lock and releasing it, using SQL for upsert operations. feat: Add SurfaceManifestPointer record for manifest pointers - Introduced SurfaceManifestPointer to represent a minimal pointer to a Surface.FS manifest associated with an image digest. feat: Create PolicySimulationInputLock and related validation logic - Added PolicySimulationInputLock record to describe policy simulation inputs and expected digests. - Implemented validation logic for policy simulation inputs, including checks for digest drift and shadow mode requirements. test: Add unit tests for ReplayVerificationService and ReplayVerifier - Created ReplayVerificationServiceTests to validate the behavior of the ReplayVerificationService under various scenarios. - Developed ReplayVerifierTests to ensure the correctness of the ReplayVerifier logic. test: Implement PolicySimulationInputLockValidatorTests - Added tests for PolicySimulationInputLockValidator to verify the validation logic against expected inputs and conditions. chore: Add cosign key example and signing scripts - Included a placeholder cosign key example for development purposes. - Added a script for signing Signals artifacts using cosign with support for both v2 and v3. chore: Create script for uploading evidence to the evidence locker - Developed a script to upload evidence to the evidence locker, ensuring required environment variables are set.
Zastava Evidence Locker (schemas/kit)
Signed 2025-12-02 with Ed25519 key (pub base64url: mpIEbYRL1q5yhN6wBRvkZ_0xXz3QUJPueJJ8sn__GGc). Private key stored offline; all signatures use DSSEv1 pre-auth encoding.
Public key copy: docs/modules/zastava/kit/ed25519.pub.
Artefacts
schemas/observer_event.schema.json.dsse(payloadTypeapplication/vnd.stellaops.zastava.schema+json;name=observer_event;version=1)schemas/webhook_admission.schema.json.dsse(payloadTypeapplication/vnd.stellaops.zastava.schema+json;name=webhook_admission;version=1)thresholds.yaml.dsse(payloadTypeapplication/vnd.stellaops.zastava.thresholds+yaml;version=1)exports/observer_events.ndjson.dsse(payloadTypeapplication/vnd.stellaops.zastava.observer-events+ndjson;version=1)exports/webhook_admissions.ndjson.dsse(payloadTypeapplication/vnd.stellaops.zastava.webhook-admissions+ndjson;version=1)kit/zastava-kit.tzst.dsse(payloadTypeapplication/vnd.stellaops.zastava.kit+tzst;version=1)
Evidence Locker targets
evidence-locker/zastava/2025-12-02/observer_event.schema.json.dsseevidence-locker/zastava/2025-12-02/webhook_admission.schema.json.dsseevidence-locker/zastava/2025-12-02/thresholds.yaml.dsseevidence-locker/zastava/2025-12-02/observer_events.ndjson.dsseevidence-locker/zastava/2025-12-02/webhook_admissions.ndjson.dsseevidence-locker/zastava/2025-12-02/zastava-kit.tzstevidence-locker/zastava/2025-12-02/zastava-kit.tzst.dsseevidence-locker/zastava/2025-12-02/SHA256SUMS
Local staging: all files above are present under evidence-locker/zastava/2025-12-02/ in the repo root, ready for locker upload/mirroring.
Helper script for manual push (expects EVIDENCE_LOCKER_URL and CI_EVIDENCE_LOCKER_TOKEN):
tools/zastava-upload-evidence.sh
CI delivery note
- Locker upload in CI requires a write credential (e.g.,
CI_EVIDENCE_LOCKER_TOKEN) with access to theevidence-locker/zastava/namespace. - If the secret is absent, perform a manual upload from the staged folder and record the locker URI in the sprint log.
Signing template (Python, ed25519)
python - <<'PY'
from pathlib import Path
from base64 import urlsafe_b64encode
import json
from cryptography.hazmat.primitives.asymmetric import ed25519
from cryptography.hazmat.primitives import serialization
priv = serialization.load_pem_private_key(Path('/tmp/zastava-ed25519.key').read_bytes(), password=None)
pub = priv.public_key().public_bytes(encoding=serialization.Encoding.Raw, format=serialization.PublicFormat.Raw)
keyid = urlsafe_b64encode(pub).decode().rstrip('=')
pt = '<payload-type>'
payload = Path('<file-to-sign>').read_bytes()
pae = b' '.join([b'DSSEv1', str(len(pt)).encode(), pt.encode(), str(len(payload)).encode(), payload])
sig = priv.sign(pae)
env = {
'payloadType': pt,
'payload': urlsafe_b64encode(payload).decode().rstrip('='),
'signatures': [{'keyid': keyid, 'sig': urlsafe_b64encode(sig).decode().rstrip('=')}],
}
Path('<file-to-sign>.dsse').write_text(json.dumps(env, indent=2, sort_keys=True) + '\n')
print('signed', '<file-to-sign>', 'with keyid', keyid)
PY
Post-sign checklist
- Run
kit/verify.shto validate hashes + DSSE. - Upload artefacts + DSSEs + SHA256SUMS to the Evidence Locker paths above.
- Record URIs in sprint 0144 Decisions & Risks and mark ZASTAVA-SCHEMAS-0001 / ZASTAVA-THRESHOLDS-0001 / ZASTAVA-KIT-0001 as DONE.