# SecureAudit Version Control - Branch Protection Rules

## RBAC Enforcement
- **GLOBAL**: All users (read-only)
- **INTERNAL**: Developers (push/merge)
- **RESTRICTED**: Admins (force push, delete)

## TLS 1.3 Requirements
```mermaid
graph TD
    A[Git Client] -->|TLS 1.3 AES256-GCM/CHACHA20| B[Git Server]
    B -->|Certificate Pinning| C[RBAC Engine]
    C -->|HMAC-SHA256| D[Audit Logs]
```

## Certificate Pinning
1. Server certificates must have SHA-256 fingerprints registered in:
   ```python
   # In RBACEngine initialization
   self.trusted_cert_fingerprints = {
       'fingerprint1': 'admin.example.com',
       'fingerprint2': 'git.internal.example.com'
   }
   ```

## Audit Log Requirements
- All git operations must include:
  - HMAC-SHA256 signature
  - Timestamp verification
  - Chained hashes for tamper detection

## Branch Protection Matrix
| Branch Type   | Push Access       | Merge Access      | Force Push |
|---------------|-------------------|-------------------|------------|
| main          | RESTRICTED only   | RESTRICTED only   | Disabled   |
| release/*     | INTERNAL+         | INTERNAL+         | Disabled   |
| feature/*     | DEVELOPER+        | DEVELOPER+        | Disabled   |

## Implementation Verification
✅ RBAC Boundaries  
✅ TLS 1.3 Enforcement  
✅ Certificate Pinning  
✅ Audit Log Integrity