New file |
0,0 → 1,72 |
<?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 Janrain, Inc. |
* @license http://www.gnu.org/copyleft/lesser.html LGPL |
*/ |
|
/** |
* SHA1_BLOCKSIZE is this module's SHA1 blocksize used by the fallback |
* implementation. |
*/ |
define('Auth_OpenID_SHA1_BLOCKSIZE', 64); |
|
if (!function_exists('sha1')) { |
/** |
* Return a raw SHA1 hash of the given string |
* |
* XXX: include the SHA1 code from Dan Libby's OpenID library |
*/ |
function Auth_OpenID_SHA1($text) |
{ |
trigger_error('No SHA1 function found', E_USER_ERROR); |
} |
} else { |
/** |
* @ignore |
*/ |
function Auth_OpenID_SHA1($text) |
{ |
$hex = sha1($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; |
} |
} |
|
/** |
* 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, $text) |
{ |
if (strlen($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; |
} |
|
?> |