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// | Copyright (c) 2002-2003 Richard Heyes                                 | 
// | All rights reserved.                                                  | 
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// +-----------------------------------------------------------------------+ 
// | Author: Richard Heyes &lt;richard@php.net&gt;                               | 
// +-----------------------------------------------------------------------+ 
// 
// $Id$

/**
* Implmentation of CRAM-MD5 SASL mechanism
*
* @author  Richard Heyes &lt;richard@php.net&gt;
* @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 $challenge The challenge supplied by the server.
    *                          this should be already base64_decoded.
    *
    * @return string The string to pass back to the server, of the form
    *                &quot;&lt;user&gt; &lt;digest&gt;&quot;. This is NOT base64_encoded.
    */
    function getResponse($user, $pass, $challenge)
    {
        return $user . ' ' . $this-&gt;_HMAC_MD5($pass, $challenge);
    }
}
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