(PHP Extension) SFTP Authenticate Secure

Demonstrates how to do SFTP password authentication with secure strings.

This example requires Chilkat v9.5.0.71 or greater.

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<?php

// The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number.
// For example, if using Chilkat v9.5.0.48, then include as shown here:
include("chilkat_9_5_0.php");

//  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=="
//  }

$json = new CkJsonObject();
$json->LoadFile('qa_data/passwords/ssh.json');

$crypt = new CkCrypt2();

//  These are the encryption settings we previously used to encrypt the credentials within the JSON config file.
$crypt->put_CryptAlgorithm('aes');
$crypt->put_CipherMode('cbc');
$crypt->put_KeyLength(128);
$crypt->SetEncodedKey('000102030405060708090A0B0C0D0E0F','hex');
$crypt->SetEncodedIV('000102030405060708090A0B0C0D0E0F','hex');
$crypt->put_EncodingMode('base64');

$ssLogin = new CkSecureString();
$ssPassword = new 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);

$sftp = new CkSFtp();

$success = $sftp->Connect('MY-SSH-SERVER-DOMAIN-OR-IP',22);
if ($success != true) {
    print $sftp->lastErrorText() . "\n";
    exit;
}

//  Authenticate using secure strings
$success = $sftp->AuthenticateSecPw($ssLogin,$ssPassword);
if ($success != true) {
    print $sftp->lastErrorText() . "\n";
    exit;
}

print 'SFTP Authentication successful.' . "\n";

$sftp->Disconnect();

?>