# nu_plugin_kms Implementation Status\n\n## Phase 1: Base Structure (COMPLETED ✅)\n\n**Date**: 2025-10-08\n**Agent**: Agente 4 (Base Structure)\n\n### Files Created\n\n| File | Lines | Status | Description |\n|------|-------|--------|-------------|\n| `Cargo.toml` | 23 | ✅ Complete | Dependencies with path references |\n| `src/main.rs` | 194 | ✅ Complete | Plugin entry point with 4 commands |\n| `src/helpers.rs` | 23 | 🟡 Stub | Backend implementations (for Agente 5) |\n| `src/tests.rs` | 7 | 🟡 Stub | Test suite (for Agente 5) |\n| `README.md` | 24 | ✅ Complete | Basic documentation |\n| **Total** | **271** | - | - |\n\n### Build Verification\n\n```plaintext\n✅ cargo check: PASSED (5 non-critical warnings)\n✅ cargo build: PASSED (32.18s)\n✅ Binary created: target/debug/nu_plugin_kms (23MB)\n✅ Protocol handshake: SUCCESS\n✅ MsgPack serialization: Working\n```\n\n### Commands Implemented (Placeholder)\n\n#### 1. `kms encrypt`\n\n```nushell\nkms encrypt --backend --key \n```\n\n- **Input**: String\n- **Output**: String (placeholder: "ENCRYPTED_PLACEHOLDER")\n- **Backends**: rustyvault, age, cosmian\n- **Status**: Stub implementation\n\n#### 2. `kms decrypt`\n\n```nushell\nkms decrypt --backend --key \n```\n\n- **Input**: String\n- **Output**: String (placeholder: "DECRYPTED_PLACEHOLDER")\n- **Backends**: rustyvault, age, cosmian\n- **Status**: Stub implementation\n\n#### 3. `kms generate-key`\n\n```nushell\nkms generate-key --spec --backend \n```\n\n- **Input**: Nothing\n- **Output**: Record {plaintext: string, ciphertext: string}\n- **Key Specs**: AES128, AES256\n- **Status**: Stub implementation\n\n#### 4. `kms status`\n\n```nushell\nkms status\n```\n\n- **Input**: Nothing\n- **Output**: Record {backend: string, available: bool}\n- **Status**: Stub implementation\n\n### Dependencies Configured\n\n#### Path Dependencies (Nushell Integration)\n\n```toml\nnu-plugin = { version = "0.107.1", path = "../nushell/crates/nu-plugin" }\nnu-protocol = { version = "0.107.1", path = "../nushell/crates/nu-protocol", features = ["plugin"] }\n```\n\n#### External Dependencies (KMS Backends)\n\n```toml\nrusty_vault = "0.2.1" # RustyVault client\nage = "0.10" # Age encryption\nbase64 = "0.22" # Base64 encoding\nserde = "1.0" # Serialization\nserde_json = "1.0" # JSON support\nreqwest = "0.12" # HTTP client (fallback)\ntokio = "1.40" # Async runtime\ntempfile = "3.10" # Temporary files\n```\n\n### Helper Functions (Stub)\n\n```rust\n// src/helpers.rs\npub enum Backend {\n RustyVault,\n Age,\n Cosmian,\n Fallback,\n}\n\npub fn detect_backend() -> Backend\npub fn encode_base64(data: &[u8]) -> String\npub fn decode_base64(data: &str) -> Result, String>\n```\n\n### Pattern Compliance\n\n✅ **Follows nu_plugin_tera structure exactly**:\n\n- Same Cargo.toml pattern (path dependencies to ../nushell/)\n- Same Plugin trait implementation\n- Same SimplePluginCommand pattern\n- Same module organization (helpers.rs, tests.rs)\n- Same category: `Custom("provisioning".into())`\n- Same serializer: `MsgPackSerializer`\n\n## Phase 2: Backend Implementation (PENDING 🟡)\n\n**Assigned To**: Agente 5 (KMS Backend Implementation)\n\n### Tasks for Agente 5\n\n#### 1. RustyVault Backend\n\n- [ ] Implement `encrypt_with_rustyvault(data, key) -> Result`\n- [ ] Implement `decrypt_with_rustyvault(encrypted, key) -> Result`\n- [ ] Implement `generate_key_rustyvault(spec) -> Result<(Vec, Vec)>`\n- [ ] Add RustyVault client initialization\n- [ ] Add error handling and retries\n- [ ] Add connection pooling\n\n#### 2. Age Backend\n\n- [ ] Implement `encrypt_with_age(data, recipient) -> Result`\n- [ ] Implement `decrypt_with_age(encrypted, identity_path) -> Result`\n- [ ] Implement `generate_age_keypair() -> Result<(String, String)>`\n- [ ] Add age recipient handling\n- [ ] Add identity file management\n- [ ] Add age armor format support\n\n#### 3. Cosmian Backend\n\n- [ ] Implement `encrypt_with_cosmian(data, key) -> Result`\n- [ ] Implement `decrypt_with_cosmian(encrypted, key) -> Result`\n- [ ] Add Cosmian client initialization\n- [ ] Add CoverCrypt support\n- [ ] Add policy-based encryption\n\n#### 4. HTTP Fallback Backend\n\n- [ ] Implement `encrypt_via_http(data, endpoint) -> Result`\n- [ ] Implement `decrypt_via_http(encrypted, endpoint) -> Result`\n- [ ] Add HTTP client with retry logic\n- [ ] Add authentication (API keys, JWT)\n- [ ] Add TLS certificate validation\n\n#### 5. Backend Detection\n\n- [ ] Implement `detect_backend() -> Backend`\n - Check environment variables (KMS_BACKEND)\n - Check RustyVault connectivity\n - Check Age key availability\n - Check Cosmian configuration\n - Fallback to HTTP endpoint\n- [ ] Add backend health checks\n- [ ] Add backend failover logic\n\n#### 6. Command Implementation\n\n- [ ] Update `KmsEncrypt::run()` with real encryption\n- [ ] Update `KmsDecrypt::run()` with real decryption\n- [ ] Update `KmsGenerateKey::run()` with real key generation\n- [ ] Update `KmsStatus::run()` with real health checks\n- [ ] Add proper error handling (LabeledError)\n- [ ] Add input validation\n\n#### 7. Testing\n\n- [ ] Unit tests for each backend\n- [ ] Integration tests with mock KMS services\n- [ ] Error case testing\n- [ ] Performance benchmarks\n- [ ] Documentation tests (examples)\n\n#### 8. Documentation\n\n- [ ] Add command examples to README\n- [ ] Add backend configuration guide\n- [ ] Add troubleshooting section\n- [ ] Add performance considerations\n- [ ] Add security best practices\n\n### Expected File Structure After Phase 2\n\n```plaintext\nnu_plugin_kms/\n├── Cargo.toml\n├── README.md\n├── src/\n│ ├── main.rs (commands)\n│ ├── helpers.rs (→ backends/)\n│ ├── backends/\n│ │ ├── mod.rs\n│ │ ├── rustyvault.rs\n│ │ ├── age.rs\n│ │ ├── cosmian.rs\n│ │ ├── http.rs\n│ │ └── common.rs\n│ ├── tests.rs\n│ └── lib.rs (optional)\n├── tests/\n│ ├── integration_tests.rs\n│ ├── backend_tests.rs\n│ └── fixtures/\n├── examples/\n│ ├── basic_encryption.rs\n│ ├── key_generation.rs\n│ └── backend_selection.rs\n└── benches/\n └── encryption_benchmarks.rs\n```\n\n## Integration Points\n\n### 1. Config System Integration\n\nPlugin should read configuration from provisioning config:\n\n```toml\n[kms]\nbackend = "rustyvault" # or "age", "cosmian", "http"\nrustyvault_addr = "http://localhost:8200"\nage_recipients_file = "~/.config/provisioning/age/recipients.txt"\ncosmian_endpoint = "https://cosmian.example.com"\nhttp_fallback_url = "http://localhost:8080/kms"\n```\n\n### 2. Environment Variables\n\n```bash\nKMS_BACKEND=rustyvault|age|cosmian|http\nVAULT_ADDR=http://localhost:8200\nVAULT_TOKEN=...\nAGE_RECIPIENTS_FILE=...\nAGE_IDENTITY_FILE=...\nCOSMIAN_ENDPOINT=...\nKMS_HTTP_ENDPOINT=...\n```\n\n### 3. Nushell Integration\n\nAfter building, register the plugin:\n\n```nushell\nplugin add target/release/nu_plugin_kms\nplugin use kms\n```\n\nUsage examples:\n\n```nushell\n# Encrypt data\n"my secret" | kms encrypt --backend rustyvault\n\n# Decrypt data\n"ENCRYPTED_DATA" | kms decrypt --backend rustyvault\n\n# Generate key\nkms generate-key --spec AES256\n\n# Check status\nkms status\n```\n\n### 4. CLI Integration\n\nThe provisioning CLI can use this plugin for:\n\n- Config file encryption (`provisioning config encrypt`)\n- Secret management (`provisioning secrets encrypt`)\n- Dynamic secret generation\n- KMS health monitoring\n\n## Success Criteria\n\n### Phase 1 (Completed ✅)\n\n- [x] Plugin structure created following nu_plugin_tera pattern\n- [x] All 4 commands defined with proper signatures\n- [x] Plugin compiles without errors\n- [x] Plugin responds to protocol handshake\n- [x] Dependencies configured with path references\n- [x] README documentation complete\n\n### Phase 2 (Pending 🟡)\n\n- [ ] All 4 backends implemented (RustyVault, Age, Cosmian, HTTP)\n- [ ] Backend auto-detection working\n- [ ] All commands perform real encryption/decryption\n- [ ] Comprehensive test suite (unit + integration)\n- [ ] Error handling complete\n- [ ] Documentation with examples\n- [ ] Performance benchmarks passing\n- [ ] Security audit passed\n\n## Timeline Estimate\n\n| Phase | Tasks | Estimated Time |\n|-------|-------|---------------|\n| Phase 1: Base Structure | 5 files, basic structure | ✅ Completed |\n| Phase 2: Backend Implementation | 4 backends, tests, docs | ~8-12 hours |\n| Phase 3: Integration Testing | End-to-end testing | ~2-4 hours |\n| Phase 4: Documentation | User guide, examples | ~2-3 hours |\n| **Total** | - | **12-19 hours** |\n\n## References\n\n### Similar Plugins\n\n- `nu_plugin_tera` - Template rendering (structure pattern)\n- Existing KMS service - HTTP API reference\n- Config encryption module - Use case examples\n\n### External Documentation\n\n- [RustyVault API](https://github.com/Tongsuo-Project/RustyVault)\n- [Age Encryption](https://github.com/FiloSottile/age)\n- [Cosmian KMS](https://docs.cosmian.com/)\n- [Nushell Plugin Guide](https://www.nushell.sh/contributor-book/plugins.html)\n\n---\n\n**Status**: Ready for Agente 5 (Backend Implementation)\n**Last Updated**: 2025-10-08\n**Next Agent**: Agente 5 - KMS Backend Implementation