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109 lines
3.1 KiB
PHP
109 lines
3.1 KiB
PHP
<?php
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/**
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* Zend Framework
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*
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* LICENSE
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*
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* This source file is subject to the new BSD license that is bundled
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* with this package in the file LICENSE.txt.
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* It is also available through the world-wide-web at this URL:
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* http://framework.zend.com/license/new-bsd
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* If you did not receive a copy of the license and are unable to
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* obtain it through the world-wide-web, please send an email
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* to license@zend.com so we can send you a copy immediately.
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*
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* @category Zend
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* @package Zend_Mail
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* @subpackage Protocol
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* @copyright Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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* @version $Id: Crammd5.php 24593 2012-01-05 20:35:02Z matthew $
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*/
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/**
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* @see Zend_Mail_Protocol_Smtp
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*/
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require_once 'Zend/Mail/Protocol/Smtp.php';
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/**
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* Performs CRAM-MD5 authentication
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*
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* @category Zend
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* @package Zend_Mail
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* @subpackage Protocol
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* @copyright Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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class Zend_Mail_Protocol_Smtp_Auth_Crammd5 extends Zend_Mail_Protocol_Smtp
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{
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/**
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* Constructor.
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*
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* @param string $host (Default: 127.0.0.1)
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* @param int $port (Default: null)
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* @param array $config Auth-specific parameters
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* @return void
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*/
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public function __construct($host = '127.0.0.1', $port = null, $config = null)
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{
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if (is_array($config)) {
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if (isset($config['username'])) {
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$this->_username = $config['username'];
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}
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if (isset($config['password'])) {
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$this->_password = $config['password'];
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}
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}
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parent::__construct($host, $port, $config);
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}
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/**
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* @todo Perform CRAM-MD5 authentication with supplied credentials
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*
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* @return void
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*/
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public function auth()
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{
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// Ensure AUTH has not already been initiated.
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parent::auth();
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$this->_send('AUTH CRAM-MD5');
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$challenge = $this->_expect(334);
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$challenge = base64_decode($challenge);
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$digest = $this->_hmacMd5($this->_password, $challenge);
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$this->_send(base64_encode($this->_username . ' ' . $digest));
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$this->_expect(235);
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$this->_auth = true;
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}
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/**
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* Prepare CRAM-MD5 response to server's ticket
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*
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* @param string $key Challenge key (usually password)
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* @param string $data Challenge data
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* @param string $block Length of blocks
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* @return string
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*/
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protected function _hmacMd5($key, $data, $block = 64)
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{
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if (strlen($key) > 64) {
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$key = pack('H32', md5($key));
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} elseif (strlen($key) < 64) {
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$key = str_pad($key, $block, "\0");
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}
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$k_ipad = substr($key, 0, 64) ^ str_repeat(chr(0x36), 64);
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$k_opad = substr($key, 0, 64) ^ str_repeat(chr(0x5C), 64);
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$inner = pack('H32', md5($k_ipad . $data));
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$digest = md5($k_opad . $inner);
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return $digest;
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}
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}
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