<?php
// +-----------------------------------------------------------------------+
// | Copyright (c) 2002-2003 Richard Heyes                                 |
// | All rights reserved.                                                  |
// |                                                                       |
// | Redistribution and use in source and binary forms, with or without    |
// | modification, are permitted provided that the following conditions    |
// | are met:                                                              |
// |                                                                       |
// | o Redistributions of source code must retain the above copyright      |
// |   notice, this list of conditions and the following disclaimer.       |
// | o Redistributions in binary form must reproduce the above copyright   |
// |   notice, this list of conditions and the following disclaimer in the |
// |   documentation and/or other materials provided with the distribution.|
// | o The names of the authors may not be used to endorse or promote      |
// |   products derived from this software without specific prior written  |
// |   permission.                                                         |
// |                                                                       |
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// +-----------------------------------------------------------------------+
// | Author: Richard Heyes <richard@php.net>                               |
// +-----------------------------------------------------------------------+
//
// $Id: CramMD5.php,v 1.4 2003/02/21 16:07:17 mj Exp $

/**
* Implmentation of CRAM-MD5 SASL mechanism
*
* @author  Richard Heyes <richard@php.net>
* @access  public
* @version 1.0
* @package Auth_SASL
*/

require_once(PEAR_DIR.'Auth/SASL/Common.php');

class Auth_SASL_CramMD5 extends Auth_SASL_Common
{
    /**
    * Implements the CRAM-MD5 SASL mechanism
    * This DOES NOT base64 encode the return value,
    * you will need to do that yourself.
    *
    * @param string $user      Username
    * @param string $pass      Password
    * @param string $challenge The challenge supplied by the server.
    *                          this should be already base64_decoded.
    *
    * @return string The string to pass back to the server, of the form
    *                "<user> <digest>". This is NOT base64_encoded.
    */
    function getResponse($user, $pass, $challenge)
    {
        return $user . ' ' . $this->_HMAC_MD5($pass, $challenge);
    }
}
?>