canonical.py
python
sha256:a78e7e5a8740e03315f325d19edeb3aa1b306b3337d04abbaa9a9e0f3bbeb7a1
docs: MuseHub-first before ISR #74 — staging solidify NEXT
Human
12 hours ago
| 1 | """Canonical JSON and entry hashing (§K9.7).""" |
| 2 | |
| 3 | from __future__ import annotations |
| 4 | |
| 5 | import hashlib |
| 6 | import json |
| 7 | from typing import Any |
| 8 | |
| 9 | |
| 10 | def canonical_json(value: Any) -> str: |
| 11 | """Serialize ``value`` as canonical JSON for hashing.""" |
| 12 | return json.dumps(value, ensure_ascii=False, separators=(",", ":"), sort_keys=True) |
| 13 | |
| 14 | |
| 15 | def _hash_payload(body: dict[str, Any]) -> dict[str, Any]: |
| 16 | """Build the canonical-hash payload, excluding ``entry_hash`` and ``provenance.sig``.""" |
| 17 | payload = {key: val for key, val in body.items() if key != "entry_hash"} |
| 18 | provenance = payload.get("provenance") |
| 19 | if isinstance(provenance, dict) and "sig" in provenance: |
| 20 | stripped = {key: val for key, val in provenance.items() if key != "sig"} |
| 21 | payload = {**payload, "provenance": stripped} |
| 22 | return payload |
| 23 | |
| 24 | |
| 25 | def compute_entry_hash(body: dict[str, Any]) -> str: |
| 26 | """Compute lowercase hex SHA-256 of canonical JSON without ``entry_hash`` or ``provenance.sig``.""" |
| 27 | digest = hashlib.sha256(canonical_json(_hash_payload(body)).encode("utf-8")).hexdigest() |
| 28 | return digest.lower() |
File History
2 commits
sha256:a78e7e5a8740e03315f325d19edeb3aa1b306b3337d04abbaa9a9e0f3bbeb7a1
docs: MuseHub-first before ISR #74 — staging solidify NEXT
Human
12 hours ago
sha256:4671b7f787ddbe63ced31c895b688c77ab495653b65a730b423329f26b3c1439
feat: K1-P1 complete — agent provenance, build-verification…
Sonnet 4.6
patch
52 days ago