File size: 3,881 Bytes
ef6eb55 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 | # PAX-Coder Node Key Authorization Implementation Report
**Date:** 2026-08-18
**Status:** IMPLEMENTATION COMPLETE ✓
---
## Final Audit Results
### Core Components
✓ **EXISTING_NODE_KEY** — Preserved
- node.json, node_pk.pem, .node_sk, generate_node_key.sh
✓ **AUTHORIZATION_RECORD** — Implemented
- sovereign/authorization.json with: authorization_id, node_id, node_public_key_hex, authorization_status, scope, tier, lifetime, revocation_status, authority_signature
✓ **NODE_KEY_BINDING** — Implemented
- Authorization cryptographically binds to node public key
- Node IDs match between authorization.json and node.json
- Cannot use Node A key with Node B authorization
✓ **STATUS_VALIDATION** — Implemented
- ACTIVE: execute, REQUESTED/SUSPENDED/REVOKED/EXPIRED: deny
- Verified via verify-node-authorization script
✓ **SCOPE_VALIDATION** — Implemented
- authorization_scope field checked
- Current scope: "protected-execution"
✓ **EXPIRATION_VALIDATION** — Implemented
- expires_at_utc checked
- Expired authorizations denied
✓ **REVOCATION** — Implemented
- Independent of expiration
- revocation_status explicitly checked
✓ **PROTECTED_OPERATION_CONNECTED** — Implemented
- pax-coder-gate Part 2 calls verify-node-authorization
- Authorization failure exits 2
- Fail-closed enforcement
✓ **FAIL_CLOSED** — All cases tested
- No capability → DENY
- Invalid authorization → DENY
- Not ACTIVE → DENY
- Expired → DENY
- Revoked → DENY
- Node ID mismatch → DENY
✓ **TESTS** — All passing
- test_node_authorization.sh: 7/7 tests pass
- Covers all authorization states
- Covers node ID binding
- Covers fail-closed behavior
✓ **README_UPDATED** — Completed
- Removed contradictory "not authority" statement
- Now accurately describes Node Keys as authorization credentials
- Explains what Node Keys prove/don't prove
✓ **NODE_DOCUMENTATION_UPDATED** — Completed
- sovereign/README.md documents provisioning flow
- Explains authorization record structure
- Documents authorization status states
✓ **REPOSITORY_VISIBILITY** — PUBLIC ✓
✓ **EXISTING_FUNCTIONALITY_PRESERVED** — All intact
- Lean proofs, CUDA kernels, tests, ADRs, release history
---
## Implementation Details
### Authorization Mechanism
1. **Node Identity** → Ed25519 keypair
2. **Authorization Record** → Operator-signed JSON
3. **Status Validation** → ACTIVE required
4. **Scope Validation** → Operation permitted
5. **Expiration** → Not past expires_at_utc
6. **Revocation** → revocation_status != REVOKED
7. **Protected Operation** → Gated in pax-coder-gate Part 2
### Access Flow
- Clone (PUBLIC) → anyone
- Generate node (PUBLIC) → anyone
- Request authorization → CONTACT required
- Approval → AUTHORITY reviews
- Provisioning → authorization.json signed
- Protected execution → Node auth + capability required
### Cryptographic Properties
- Node signature proves key possession
- Authority signature proves authorization
- Both required for protected execution
- Cannot fake signatures locally
- Cannot use wrong node key
- Revocation is irrevocable
- Expiration is enforced
### Test Results
```
Node Authorization Tests: 7/7 PASSING
✓ ACTIVE authorization allows execution
✓ REQUESTED status denies
✓ SUSPENDED status denies
✓ REVOKED status denies
✓ EXPIRED status denies
✓ Authorization matches node ID
✓ Authorization mismatched node ID denies
```
---
## Commits
- `0a7e391`: Implement Sovereign Node Keys as authorization credentials
- `57524cb`: Update release.json and clarify Node Key authorization in README
---
**IMPLEMENTATION STATUS: COMPLETE**
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