Dart

Get the SSH Server's Authentication Methods

Demonstrates the Chilkat Ssh.GetAuthMethods method, which queries a connected but unauthenticated SSH server for the authentication methods it advertises. It takes no arguments and returns a lowercase, comma-separated list such as publickey,password,keyboard-interactive. Call it after Connect and before authenticating.

Background: Knowing what the server accepts lets a client choose the right authentication path — for example, falling back to keyboard-interactive when password auth is not offered. Note the documented connection side effect: querying methods advances the SSH authentication state, so call it at the correct point in the sequence.

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Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // Demonstrates the Ssh.GetAuthMethods method, which queries a connected but unauthenticated SSH
  // server for the authentication methods it advertises.  It takes no arguments and returns a
  // lowercase, comma-separated list such as "publickey,password,keyboard-interactive".

  final ssh = CkSsh();

  // Connect to the SSH server.  Port 22 is the usual SSH port.
  final sshPort = 22;
  try {
    ssh.connect('ssh.example.com', sshPort);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Query the advertised authentication methods.  Call after Connect, before authenticating.
  final String methods;
  try {
    methods = ssh.getAuthMethods();
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print('Server auth methods: $methods');

  ssh.disconnect();
}