99 lines
2.7 KiB
PHP
99 lines
2.7 KiB
PHP
|
<?php
|
||
|
|
|
||
|
|
/**
|
||
|
|
* This is the HMACSHA1 implementation for the OpenID library.
|
||
|
|
*
|
||
|
|
* PHP versions 4 and 5
|
||
|
|
*
|
||
|
|
* LICENSE: See the COPYING file included in this distribution.
|
||
|
|
*
|
||
|
|
* @access private
|
||
|
|
* @package OpenID
|
||
|
|
* @author JanRain, Inc. <openid@janrain.com>
|
||
|
|
* @copyright 2005-2008 Janrain, Inc.
|
||
|
|
* @license http://www.apache.org/licenses/LICENSE-2.0 Apache
|
||
|
|
*/
|
||
|
|
|
||
|
|
require_once 'Auth/OpenID.php';
|
||
|
|
|
||
|
|
/**
|
||
|
|
* SHA1_BLOCKSIZE is this module's SHA1 blocksize used by the fallback
|
||
|
|
* implementation.
|
||
|
|
*/
|
||
|
|
define('Auth_OpenID_SHA1_BLOCKSIZE', 64);
|
||
|
|
|
||
|
|
function Auth_OpenID_SHA1($text)
|
||
|
|
{
|
||
|
|
if (function_exists('hash') &&
|
||
|
|
function_exists('hash_algos') &&
|
||
|
|
(in_array('sha1', hash_algos()))) {
|
||
|
|
// PHP 5 case (sometimes): 'hash' available and 'sha1' algo
|
||
|
|
// supported.
|
||
|
|
return hash('sha1', $text, true);
|
||
|
|
} else if (function_exists('sha1')) {
|
||
|
|
// PHP 4 case: 'sha1' available.
|
||
|
|
$hex = sha1($text);
|
||
|
|
$raw = '';
|
||
|
|
for ($i = 0; $i < 40; $i += 2) {
|
||
|
|
$hexcode = substr($hex, $i, 2);
|
||
|
|
$charcode = (int)base_convert($hexcode, 16, 10);
|
||
|
|
$raw .= chr($charcode);
|
||
|
|
}
|
||
|
|
return $raw;
|
||
|
|
} else {
|
||
|
|
// Explode.
|
||
|
|
trigger_error('No SHA1 function found', E_USER_ERROR);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Compute an HMAC/SHA1 hash.
|
||
|
|
*
|
||
|
|
* @access private
|
||
|
|
* @param string $key The HMAC key
|
||
|
|
* @param string $text The message text to hash
|
||
|
|
* @return string $mac The MAC
|
||
|
|
*/
|
||
|
|
function Auth_OpenID_HMACSHA1($key, $text)
|
||
|
|
{
|
||
|
|
if (Auth_OpenID::bytes($key) > Auth_OpenID_SHA1_BLOCKSIZE) {
|
||
|
|
$key = Auth_OpenID_SHA1($key, true);
|
||
|
|
}
|
||
|
|
|
||
|
|
$key = str_pad($key, Auth_OpenID_SHA1_BLOCKSIZE, chr(0x00));
|
||
|
|
$ipad = str_repeat(chr(0x36), Auth_OpenID_SHA1_BLOCKSIZE);
|
||
|
|
$opad = str_repeat(chr(0x5c), Auth_OpenID_SHA1_BLOCKSIZE);
|
||
|
|
$hash1 = Auth_OpenID_SHA1(($key ^ $ipad) . $text, true);
|
||
|
|
$hmac = Auth_OpenID_SHA1(($key ^ $opad) . $hash1, true);
|
||
|
|
return $hmac;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (function_exists('hash') &&
|
||
|
|
function_exists('hash_algos') &&
|
||
|
|
(in_array('sha256', hash_algos()))) {
|
||
|
|
function Auth_OpenID_SHA256($text)
|
||
|
|
{
|
||
|
|
// PHP 5 case: 'hash' available and 'sha256' algo supported.
|
||
|
|
return hash('sha256', $text, true);
|
||
|
|
}
|
||
|
|
define('Auth_OpenID_SHA256_SUPPORTED', true);
|
||
|
|
} else {
|
||
|
|
define('Auth_OpenID_SHA256_SUPPORTED', false);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (function_exists('hash_hmac') &&
|
||
|
|
function_exists('hash_algos') &&
|
||
|
|
(in_array('sha256', hash_algos()))) {
|
||
|
|
|
||
|
|
function Auth_OpenID_HMACSHA256($key, $text)
|
||
|
|
{
|
||
|
|
// Return raw MAC (not hex string).
|
||
|
|
return hash_hmac('sha256', $text, $key, true);
|
||
|
|
}
|
||
|
|
|
||
|
|
define('Auth_OpenID_HMACSHA256_SUPPORTED', true);
|
||
|
|
} else {
|
||
|
|
define('Auth_OpenID_HMACSHA256_SUPPORTED', false);
|
||
|
|
}
|
||
|
|
|
||
|
|
?>
|