Dart

SFTP Public-Key Authentication

See more SFTP Examples

Demonstrates how to authenticate with an SSH/SFTP server using publickey authentication. Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // This example assumes the Chilkat API to have been previously unlocked.
  // See Global Unlock Sample for sample code.

  final sftp = CkSFtp();

  // Set some timeouts, in milliseconds:
  sftp.connectTimeoutMs = 5000;
  sftp.idleTimeoutMs = 15000;

  // Connect to the SSH server.  
  // The standard SSH port = 22
  // The hostname may be a hostname or IP address.
  final hostname = 'sftp.example.com';
  final port = 22;
  try {
    sftp.connect(hostname, port);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  final key = CkSshKey();

  // Load a PEM file into a string variable:
  // (This does not load the PEM file into the key.  The LoadText
  // method is a convenience method for loading the full contents of ANY text
  // file into a string variable.)
  final String privKey;
  try {
    privKey = key.loadText('myPrivateKey.pem');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Load a private key from a PEM string:
  // (Private keys may be loaded from OpenSSH and Putty formats.
  // Both encrypted and unencrypted private key file formats
  // are supported.  This example loads an unencrypted private
  // key in OpenSSH format.
  try {
    key.fromOpenSshPrivateKey(privKey);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Authenticate with the SSH server.  Chilkat SFTP supports
  // both password-based authenication as well as public-key
  // authentication.  
  try {
    sftp.authenticatePk('myLogin', key);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print(sftp.lastErrorText);
  print('Public-Key Authentication Successful!');
}