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<?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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// | 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 <richard@php.net> |
// +-----------------------------------------------------------------------+
//
// $Id$
/**
* Common functionality to SASL mechanisms
*
* @author Richard Heyes <richard@php.net>
* @access public
* @version 1.0
* @package Auth_SASL
*/
class Auth_SASL_Common
{
/**
* Function which implements HMAC MD5 digest
*
* @param string $key The secret key
* @param string $data The data to hash
* @param bool $raw_output Whether the digest is returned in binary or hexadecimal format.
*
* @return string The HMAC-MD5 digest
*/
function _HMAC_MD5($key, $data, $raw_output = FALSE)
{
if (strlen($key) > 64) {
$key = pack('H32', md5($key));
}
if (strlen($key) < 64) {
$key = str_pad($key, 64, chr(0));
}
$k_ipad = substr($key, 0, 64) ^ str_repeat(chr(0x36), 64);
$k_opad = substr($key, 0, 64) ^ str_repeat(chr(0x5C), 64);
$inner = pack('H32', md5($k_ipad . $data));
$digest = md5($k_opad . $inner, $raw_output);
return $digest;
}
/**
* Function which implements HMAC-SHA-1 digest
*
* @param string $key The secret key
* @param string $data The data to hash
* @param bool $raw_output Whether the digest is returned in binary or hexadecimal format.
* @return string The HMAC-SHA-1 digest
* @author Jehan <jehan.marmottard@gmail.com>
* @access protected
*/
protected function _HMAC_SHA1($key, $data, $raw_output = FALSE)
{
if (strlen($key) > 64) {
$key = sha1($key, TRUE);
}
if (strlen($key) < 64) {
$key = str_pad($key, 64, chr(0));
}
$k_ipad = substr($key, 0, 64) ^ str_repeat(chr(0x36), 64);
$k_opad = substr($key, 0, 64) ^ str_repeat(chr(0x5C), 64);
$inner = pack('H40', sha1($k_ipad . $data));
$digest = sha1($k_opad . $inner, $raw_output);
return $digest;
}
}
?>
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