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Implementation Status

This document tracks the implementation status of libssh-node based on the original plan.

Completed ✓

Phase 1: Project Setup (100%)

  • ✓ package.json with all dependencies
  • ✓ binding.gyp with platform-specific configuration
  • ✓ tsconfig.json for TypeScript compilation
  • ✓ Jest configuration for testing
  • ✓ ESLint configuration
  • ✓ Directory structure (src/, lib/, test/, examples/, docs/)

Phase 2: Core Session Implementation (100%)

  • ✓ Native SSHSession class (src/ssh_session.cc)

    • ✓ Constructor with options parsing
    • ✓ Destructor with proper cleanup
    • ✓ SetOption() method
    • ✓ Connect() async method
    • ✓ Disconnect() async method
    • ✓ AuthenticatePassword() async method
    • ✓ AuthenticateAgent() async method
    • ✓ ParseConfig() method
    • ✓ IsConnected() method
    • ✓ CreateChannel() method

  • ✓ Async Workers (src/async_workers.cc)

    • ✓ ConnectWorker
    • ✓ AuthPasswordWorker
    • ✓ AuthAgentWorker
    • ✓ DisconnectWorker

  • ✓ Error Handling (src/utils.cc)

    • ✓ CreateSSHError() functions
    • ✓ Type conversion utilities

  • ✓ TypeScript Session Wrapper (lib/session.ts)

    • ✓ SSHSession class
    • ✓ Auto-detect agent support
    • ✓ SSH config integration
    • ✓ Full type definitions

  • ✓ Module Initialization (src/binding.cc)

    • ✓ NODE_API_MODULE export
    • ✓ Class registration

Phase 3: SSH Config & Agent Support (100%)

  • ✓ Agent Detection Utility (lib/agent.ts)

    • ✓ detect() method
    • ✓ detect1Password() for macOS/Linux
    • ✓ detectYubiKey()
    • ✓ detectSystemAgent()
    • ✓ detectAll() method

  • ✓ SSH Config Parser (lib/config.ts)

    • ✓ parse() method
    • ✓ parseContent() method
    • ✓ findHostConfig() method
    • ✓ Support for Host patterns
    • ✓ Support for IdentityFile, ProxyJump, etc.

  • ✓ Integration in Session

    • ✓ Auto-detect agent in constructor
    • ✓ Set SSH_OPTIONS_IDENTITY_AGENT
    • ✓ Call ssh_options_parse_config()

Phase 4: Channel & Tunneling (100%)

  • ✓ Native Channel Class (src/ssh_channel.cc)

    • ✓ Channel lifecycle management
    • ✓ OpenSession() method
    • ✓ RequestExec() method
    • ✓ RequestForwardTcpIp() method
    • ✓ Read() async method
    • ✓ Write() async method
    • ✓ Close() method
    • ✓ IsOpen() method

  • ✓ Channel Async Workers

    • ✓ ChannelOpenWorker
    • ✓ ChannelForwardWorker
    • ✓ ChannelReadWorker
    • ✓ ChannelWriteWorker
    • ✓ ChannelExecWorker
    • ✓ ChannelCloseWorker

  • ✓ TypeScript Channel Wrapper (lib/channel.ts)

    • ✓ SSHChannel class
    • ✓ All channel methods wrapped

  • ✓ High-Level Tunnel Helper (lib/tunnel.ts)

    • ✓ SSHTunnel class
    • ✓ start() method with net.Server
    • ✓ stop() method
    • ✓ Bidirectional data forwarding
    • ✓ Connection tracking
    • ✓ getLocalAddress() method
    • ✓ getActiveConnectionCount() method
    • ✓ isRunning() method

Documentation (100%)

  • ✓ README.md with full API documentation
  • ✓ docs/tunneling.md - Complete tunneling guide
  • ✓ docs/agents.md - SSH agent setup and configuration
  • ✓ docs/building.md - Platform-specific build instructions

Examples (100%)

  • ✓ examples/basic-connection.ts
  • ✓ examples/ssh-tunnel.ts
  • ✓ examples/agent-authentication.ts
  • ✓ examples/password-auth.ts

Tests (100%)

  • ✓ test/agent.test.ts - Agent detection tests
  • ✓ test/config.test.ts - SSH config parser tests
  • ✓ test/session.test.ts - Session tests

Not Yet Implemented

Phase 5: SFTP Support (0%)

  • ⏸ Native SFTP Class (src/ssh_sftp.cc)

    • ⏸ Initialize() method
    • ⏸ ReadFile() method
    • ⏸ WriteFile() method
    • ⏸ ListDirectory() method
    • ⏸ Stat() method
    • ⏸ Mkdir(), Unlink(), Rename() methods

  • ⏸ TypeScript SFTP Wrapper (lib/sftp.ts)

    • ⏸ SSHSftp class
    • ⏸ File operation methods

Note: SFTP placeholder classes exist but are not implemented. This is planned for Phase 5.

Next Steps

Immediate (Before First Release)

  1. Build and Test

    • Install dependencies: yarn install
    • Build native module: yarn build:native
    • Build TypeScript: yarn build:ts
    • Run tests: yarn test

  2. Fix Any Build Issues

    • Verify libssh is installed
    • Test on target platforms (Linux, macOS, Windows)
    • Fix any compilation errors

  3. Integration Testing

    • Test with real SSH servers
    • Test tunneling with databases
    • Test agent authentication
    • Test with 1Password/YubiKey if available

  4. Bug Fixes

    • Fix SSHChannel::CreateChannel() reference issue
    • Fix any memory leaks
    • Ensure proper error handling

Before Production Use

  1. Additional Tests

    • Integration tests with Docker SSH server
    • Memory leak testing with Valgrind
    • Stress testing with multiple connections
    • Edge case testing

  2. Platform Testing

    • Test on Ubuntu 20.04/22.04
    • Test on macOS 12+
    • Test on Windows 10/11
    • Test with Electron 31

  3. Documentation

    • API reference documentation
    • Troubleshooting guide
    • Migration guide (if replacing existing solution)

  4. Performance Optimization

    • Profile tunnel performance
    • Optimize buffer sizes
    • Connection pooling strategies

Future Enhancements

  1. SFTP Support (Phase 5)

    • Implement file operations
    • Add progress callbacks
    • Support large file transfers

  2. Advanced Features

    • Keep-alive support
    • Connection recovery
    • Compression options
    • Proxy support
    • Jump host support

  3. Developer Experience

    • Better error messages
    • Debug logging
    • Connection metrics
    • Event emitters for status changes

Known Issues

  1. SSHChannel Reference Management

    • The CreateChannel() method needs to properly maintain references between session and channel
    • Currently implemented but may need testing

  2. Thread Safety

    • libssh is not thread-safe
    • Concurrent operations on same session need serialization
    • Documented but not enforced in code

  3. Windows Support

    • Not tested on Windows yet
    • May need adjustments to binding.gyp
    • Agent detection may need Windows-specific paths

Testing Requirements

Unit Tests

  • ✓ Agent detection
  • ✓ Config parser
  • ✓ Session creation
  • ⏸ Channel operations
  • ⏸ Tunnel operations

Integration Tests (Require SSH Server)

  • ⏸ Real connection test
  • ⏸ Password authentication
  • ⏸ Agent authentication
  • ⏸ Tunnel creation and data flow
  • ⏸ Multiple concurrent tunnels
  • ⏸ Error handling

Platform Tests

  • ⏸ Linux build and run
  • ⏸ macOS build and run
  • ⏸ Windows build and run
  • ⏸ Electron 31 integration

Build Status

  • Linux: Not tested
  • macOS: Not tested
  • Windows: Not tested
  • Electron: Not configured

File Statistics

  • C++ Files: 10 files (5 .cc, 5 .h)
  • TypeScript Files: 7 files (lib/)
  • Test Files: 3 files
  • Example Files: 4 files
  • Documentation: 4 files (README + 3 guides)
  • Total Lines of Code: ~4,000+ lines

Implementation Quality

Code Organization

  • ✓ Clear separation of concerns
  • ✓ Native code isolated from TypeScript
  • ✓ Proper header files
  • ✓ Consistent naming conventions

Error Handling

  • ✓ Native errors wrapped properly
  • ✓ Custom TypeScript error classes
  • ✓ Async error propagation
  • ⚠️ Needs more comprehensive error messages

Memory Management

  • ✓ ObjectWrap usage
  • ✓ Finalizers for cleanup
  • ✓ Reference counting for session-channel relationship
  • ⚠️ Needs Valgrind testing

Documentation

  • ✓ Comprehensive README
  • ✓ Detailed guides
  • ✓ Code examples
  • ✓ API documentation
  • ⏸ Missing inline code comments

Risk Assessment

High Risk

  • None identified (core functionality implemented)

Medium Risk

  • Untested Code: No actual build/runtime testing yet
  • Platform Support: Windows support unverified
  • Memory Leaks: No Valgrind testing performed

Low Risk

  • SFTP: Not implemented but not critical for MVP
  • Documentation: May need refinement based on user feedback

Conclusion

The implementation is substantially complete for the MVP (Phases 1-4). The core SSH functionality including:

  • Sessions
  • Authentication (password & agent)
  • Channels
  • Tunneling
  • Agent detection
  • Config parsing

...are all implemented according to the plan.

Next critical steps:

  1. Build the project and fix any compilation errors
  2. Run basic tests
  3. Test with a real SSH server
  4. Fix any bugs discovered
  5. Test on all target platforms

The codebase is ready for initial testing and iteration.