/app/protected/extensions/swiftmailer/lib/classes/Swift/Transport/Esmtp/Auth/CramMd5Authenticator.php
PHP | 85 lines | 44 code | 11 blank | 30 comment | 2 complexity | 3a6949b3a8bd5a944bbbe4f66d8fe62f MD5 | raw file
Possible License(s): GPL-3.0, BSD-3-Clause, LGPL-3.0, LGPL-2.1, BSD-2-Clause
- <?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.
- */
- /**
- * 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;
- }
-
- }