(PHP Extension) SMTP Login Secure

Demonstrates how to set the SMTP password using a secure string.

This example requires Chilkat v9.5.0.71 or greater.

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<?php

include("chilkat.php");
// Use "chilkat_9_5_0.php" for versions of Chilkat < 10.0.0

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

$mailman = new CkMailMan();

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

// {
//   "smtp_login": "D7lnlWY291LKMeChlvQq7N/Tg7ieuSB15a+9Ekyd0R4=",
//   "smtp_password": "5neIq9Jmn0E3p71N6Yc8TA=="
// }

$json = new CkJsonObject();
$json->LoadFile('qa_data/passwords/smtp.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('smtp_login'),$ssLogin);
$crypt->DecryptSecureENC($json->stringOf('smtp_password'),$ssPassword);

// Set the SMTP domain, login, and password
$mailman->put_SmtpHost('smtp.gmail.com');
$mailman->put_SmtpSsl(true);
$mailman->put_SmtpPort(465);

$mailman->put_SmtpUsername($ssLogin->access());
// Set the SmtpPassword property via the SetPassword method using the secure string.
$mailman->SetPassword('smtp',$ssPassword);

// Connect and authenticate..
$success = $mailman->SmtpConnect();
if ($success != true) {
    print $mailman->lastErrorText() . "\n";
    exit;
}

$success = $mailman->SmtpAuthenticate();
if ($success != true) {
    print $mailman->lastErrorText() . "\n";
    exit;
}

print 'SMTP login successful.' . "\n";

// ...

$mailman->CloseSmtpConnection();

?>