1 files changed, 88 insertions, 0 deletions
diff --git a/External/swiftmailer/lib/classes/Swift/Transport/Esmtp/Auth/CramMd5Authenticator.php b/External/swiftmailer/lib/classes/Swift/Transport/Esmtp/Auth/CramMd5Authenticator.php
new file mode 100755
index 0000000..4c7e0f2
--- /dev/null
+++ b/External/swiftmailer/lib/classes/Swift/Transport/Esmtp/Auth/CramMd5Authenticator.php
@@ -0,0 +1,88 @@
+<?php
+
+/*
+ * This file is part of SwiftMailer.
+ * (c) 2004-2009 Chris Corbyn
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+//@require 'Swift/Transport/Esmtp/Authenticator.php';
+//@require 'Swift/Transport/SmtpAgent.php';
+//@require 'Swift/TransportException.php';
+
+/**
+ * Handles CRAM-MD5 authentication.
+ * @package Swift
+ * @subpackage Transport
+ * @author Chris Corbyn
+ */
+class Swift_Transport_Esmtp_Auth_CramMd5Authenticator
+  implements Swift_Transport_Esmtp_Authenticator
+{
+  
+  /**
+   * Get the name of the AUTH mechanism this Authenticator handles.
+   * @return string
+   */
+  public function getAuthKeyword()
+  {
+    return 'CRAM-MD5';
+  }
+  
+  /**
+   * Try to authenticate the user with $username and $password.
+   * @param Swift_Transport_SmtpAgent $agent
+   * @param string $username
+   * @param string $password
+   * @return boolean
+   */
+  public function authenticate(Swift_Transport_SmtpAgent $agent,
+    $username, $password)
+  {
+    try
+    {
+      $challenge = $agent->executeCommand("AUTH CRAM-MD5\r\n", array(334));
+      $challenge = base64_decode(substr($challenge, 4));
+      $message = base64_encode(
+        $username . ' ' . $this->_getResponse($password, $challenge)
+        );
+      $agent->executeCommand(sprintf("%s\r\n", $message), array(235));
+      return true;
+    }
+    catch (Swift_TransportException $e)
+    {
+      $agent->executeCommand("RSET\r\n", array(250));
+      return false;
+    }
+  }
+  
+  /**
+   * Generate a CRAM-MD5 response from a server challenge.
+   * @param string $secret
+   * @param string $challenge
+   * @return string
+   */
+  private function _getResponse($secret, $challenge)
+  {
+    if (strlen($secret) > 64)
+    {
+      $secret = pack('H32', md5($secret));
+    }
+    
+    if (strlen($secret) < 64)
+    {
+      $secret = str_pad($secret, 64, chr(0));
+    }
+    
+    $k_ipad = substr($secret, 0, 64) ^ str_repeat(chr(0x36), 64);
+    $k_opad = substr($secret, 0, 64) ^ str_repeat(chr(0x5C), 64);
+
+    $inner  = pack('H32', md5($k_ipad . $challenge));
+    $digest = md5($k_opad . $inner);
+
+    return $digest;
+  }
+  
+}