Continue SSH Tunnel Keyboard-Interactive Authentication

See more SSH Tunnel Examples

Demonstrates the Chilkat SshTunnel.ContinueKeyboardAuth method, which submits a response to a keyboard-interactive prompt. The only argument is the response text; for a request with multiple prompts, an XML response is supplied instead. It returns XML indicating the next prompt or the final result.

import 'package:chilkat/chilkat.dart';

void main() {
  // Demonstrates the SshTunnel.ContinueKeyboardAuth method, which submits a response to a
  // keyboard-interactive prompt.  The only argument is the response.  For multiple prompts, an XML
  // response is supplied instead.

  final tunnel = CkSshTunnel();

  // The tunnel forwards accepted local connections to this destination through the SSH server.
  tunnel.destHostname = 'db.internal.example.com';
  tunnel.destPort = 5432;

  // Connect to the SSH server.  This performs the TCP/proxy connection and SSH handshake, but
  // does not authenticate yet.
  final sshPort = 22;
  try {
    tunnel.connect('ssh.example.com', sshPort);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Begin keyboard-interactive authentication to receive the server's prompt(s).
  final String infoRequestXml;
  try {
    infoRequestXml = tunnel.startKeyboardAuth('mySshLogin');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Normally you would not hard-code the password in source.  You should instead obtain it
  // from an interactive prompt, environment variable, or a secrets vault.
  final password = 'mySshPassword';

  // Submit the response (typically the password).  The returned XML indicates the next prompt or
  // the final result.
  final String result;
  try {
    result = tunnel.continueKeyboardAuth(password);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print(result);

  final waitForThreadExit = true;
  try {
    tunnel.closeTunnel(waitForThreadExit);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }
}