Dart

SFTP Authenticate Secure

Demonstrates how to do SFTP password authentication with secure strings.

This example requires Chilkat v9.5.0.71 or greater.

Dart

import 'package:chilkat/chilkat.dart';

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

  // Imagine we've previously saved our encrypted login and password within a JSON config file
  // that contains this:

  // {
  //   "ssh_login": "2+qylFfC56Ck7OQQt/U2/w==",
  //   "ssh_password": "5neIq9Jmn0E3p71N6Yc8TA=="
  // }

  final json = CkJsonObject();
  json.loadFile('qa_data/passwords/ssh.json');

  final crypt = CkCrypt2();

  // These are the encryption settings we previously used to encrypt the credentials within the JSON config file.
  crypt.cryptAlgorithm = 'aes';
  crypt.cipherMode = 'cbc';
  crypt.keyLength = 128;
  crypt.setEncodedKey('000102030405060708090A0B0C0D0E0F', 'hex');
  crypt.setEncodedIV('000102030405060708090A0B0C0D0E0F', 'hex');
  crypt.encodingMode = 'base64';

  final ssLogin = CkSecureString();
  final ssPassword = CkSecureString();

  // Decrypt to the secure string.  (the strings will still held in memory encrypted, but are now encrypted using
  // a randomly generated session key.)
  crypt.decryptSecureENC(json.stringOf('ssh_login'), ssLogin);
  crypt.decryptSecureENC(json.stringOf('ssh_password'), ssPassword);

  final sftp = CkSFtp();

  try {
    sftp.connect('MY-SSH-SERVER-DOMAIN-OR-IP', 22);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Authenticate using secure strings
  try {
    sftp.authenticateSecPw(ssLogin, ssPassword);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print('SFTP Authentication successful.');

  sftp.disconnect();
}