Route Socket Connections through an SSH Object

See more Socket/SSL/TLS Examples

Demonstrates Socket.UseSsh, which configures a socket to route subsequent Connect calls through an already connected and authenticated Ssh object using SSH port forwarding.

import 'package:chilkat/chilkat.dart';

void main() {
  final ssh = CkSsh();

  // Connect and authenticate a standalone SSH object.
  try {
    ssh.connect('ssh.example.com', 22);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // The SSH password should come from a secure source rather than being hard-coded.
  final sshPassword = 'mySshPassword';
  try {
    ssh.authenticatePw('sshUser', sshPassword);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  final socket = CkSocket();

  // Route subsequent Connect calls through the already connected and authenticated SSH object.  The
  // destination is reached by SSH port forwarding rather than by a direct TCP connection.
  try {
    socket.useSsh(ssh);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Connect to the destination through the SSH tunnel.
  final bTls = false;
  final maxWaitMs = 5000;
  try {
    socket.connect('db.internal', 5432, bTls, maxWaitMs);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print('Connected to the destination through the SSH tunnel.');
}