/core/Associates/SwiftMailer/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Transport/Esmtp/Auth/CramMd5Authenticator.php
PHP | 81 lines | 37 code | 10 blank | 34 comment | 2 complexity | abbf9cebe66ca81562bb8f0e973692c0 MD5 | raw file
- <?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.
- *
- * @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 bool
- */
- 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;
- }
- }