<?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.                                                         | 
// |                                                                       | 
// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS   | 
// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT     | 
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// |                                                                       | 
// +-----------------------------------------------------------------------+ 
// | Author: Richard Heyes <[email protected]>                               | 
// +-----------------------------------------------------------------------+ 
// 
// $Id$

/**
* Implmentation of CRAM-MD5 SASL mechanism
*
* @author  Richard Heyes <[email protected]>
* @access  public
* @version 1.0
* @package Auth_SASL
*/

require_once('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);
    }
}
?>