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DanConwayDev
5ecd8d6a43
Add comprehensive authorization checks to ensure state events are only
accepted from maintainers of accepted repository announcements. This
implements the core GRASP-01 requirement that pushes must match the
latest state announcement "respecting the maintainer set."
Changes:
1. StatePolicy authorization (src/nostr/policy/state.rs):
- Check authorization BEFORE git data validation (fail-fast)
- Reject if no announcement exists for repository
- Reject if author not in maintainer set
- Use existing helpers: fetch_repository_data() and
pubkey_authorised_for_repo_owners()
- Structured logging for all rejections
2. Purgatory invalidation (src/nostr/builder.rs):
- New method: check_purgatory_state_events_for_identifier()
- Called when announcements accepted (Accept and AcceptMaintainer)
- Re-evaluates state events in purgatory for the identifier
- Processes newly-authorized events (releases from purgatory)
- Keeps unauthorized events for natural expiry (30 min)
- Enables retroactive authorization when announcements arrive late
3. Purgatory sync authorization (src/git/sync.rs):
- Check authorization BEFORE processing git data
- Remove unauthorized events from purgatory (permanent rejection)
- Prevents processing even if git data arrives first
- Structured logging for monitoring
4. Rejected events tracking (src/sync/rejected_index.rs):
- Add support for tracking rejected state events
- New methods: add_state(), contains_state()
- Separate metrics for state rejections
- Enables sync to avoid re-fetching rejected states
5. Sync metrics (src/sync/metrics.rs, src/sync/mod.rs):
- Add state-specific metrics (hot cache, cold index)
- Track rejected states separately from announcements
- Support monitoring of authorization rejections
6. Comprehensive tests (tests/state_authorization.rs):
- test_reject_state_without_announcement
- test_reject_state_from_unauthorized_author
- test_accept_state_from_announcement_author
- test_accept_state_from_maintainer
Security Impact:
- Before: State events could be published by anyone
- After: Only maintainers can publish state events
- Defense-in-depth: Authorization checked at 3 points:
1. On arrival (StatePolicy)
2. On announcement acceptance (purgatory re-evaluation)
3. On git data arrival (purgatory sync)
All tests pass:
- 248 unit tests
- 51 NIP-34 announcement tests
- 4 new state authorization tests
- 9 rejected index tests
Closes: State authorization requirement from GRASP-01 spec