[TASK] Merge submodule dbal into core
[Packages/TYPO3.CMS.git] / typo3 / sysext / openid / lib / php-openid / Auth / OpenID / HMAC.php
1 <?php
2
3 /**
4 * This is the HMACSHA1 implementation for the OpenID library.
5 *
6 * PHP versions 4 and 5
7 *
8 * LICENSE: See the COPYING file included in this distribution.
9 *
10 * @access private
11 * @package OpenID
12 * @author JanRain, Inc. <openid@janrain.com>
13 * @copyright 2005-2008 Janrain, Inc.
14 * @license http://www.apache.org/licenses/LICENSE-2.0 Apache
15 */
16
17 require_once 'Auth/OpenID.php';
18
19 /**
20 * SHA1_BLOCKSIZE is this module's SHA1 blocksize used by the fallback
21 * implementation.
22 */
23 define('Auth_OpenID_SHA1_BLOCKSIZE', 64);
24
25 function Auth_OpenID_SHA1($text)
26 {
27 if (function_exists('hash') &&
28 function_exists('hash_algos') &&
29 (in_array('sha1', hash_algos()))) {
30 // PHP 5 case (sometimes): 'hash' available and 'sha1' algo
31 // supported.
32 return hash('sha1', $text, true);
33 } else if (function_exists('sha1')) {
34 // PHP 4 case: 'sha1' available.
35 $hex = sha1($text);
36 $raw = '';
37 for ($i = 0; $i < 40; $i += 2) {
38 $hexcode = substr($hex, $i, 2);
39 $charcode = (int)base_convert($hexcode, 16, 10);
40 $raw .= chr($charcode);
41 }
42 return $raw;
43 } else {
44 // Explode.
45 trigger_error('No SHA1 function found', E_USER_ERROR);
46 }
47 }
48
49 /**
50 * Compute an HMAC/SHA1 hash.
51 *
52 * @access private
53 * @param string $key The HMAC key
54 * @param string $text The message text to hash
55 * @return string $mac The MAC
56 */
57 function Auth_OpenID_HMACSHA1($key, $text)
58 {
59 if (Auth_OpenID::bytes($key) > Auth_OpenID_SHA1_BLOCKSIZE) {
60 $key = Auth_OpenID_SHA1($key, true);
61 }
62
63 if (function_exists('hash_hmac') &&
64 function_exists('hash_algos') &&
65 (in_array('sha1', hash_algos()))) {
66 return hash_hmac('sha1', $text, $key, true);
67 }
68 // Home-made solution
69
70 $key = str_pad($key, Auth_OpenID_SHA1_BLOCKSIZE, chr(0x00));
71 $ipad = str_repeat(chr(0x36), Auth_OpenID_SHA1_BLOCKSIZE);
72 $opad = str_repeat(chr(0x5c), Auth_OpenID_SHA1_BLOCKSIZE);
73 $hash1 = Auth_OpenID_SHA1(($key ^ $ipad) . $text, true);
74 $hmac = Auth_OpenID_SHA1(($key ^ $opad) . $hash1, true);
75 return $hmac;
76 }
77
78 if (function_exists('hash') &&
79 function_exists('hash_algos') &&
80 (in_array('sha256', hash_algos()))) {
81 function Auth_OpenID_SHA256($text)
82 {
83 // PHP 5 case: 'hash' available and 'sha256' algo supported.
84 return hash('sha256', $text, true);
85 }
86 define('Auth_OpenID_SHA256_SUPPORTED', true);
87 } else {
88 define('Auth_OpenID_SHA256_SUPPORTED', false);
89 }
90
91 if (function_exists('hash_hmac') &&
92 function_exists('hash_algos') &&
93 (in_array('sha256', hash_algos()))) {
94
95 function Auth_OpenID_HMACSHA256($key, $text)
96 {
97 // Return raw MAC (not hex string).
98 return hash_hmac('sha256', $text, $key, true);
99 }
100
101 define('Auth_OpenID_HMACSHA256_SUPPORTED', true);
102 } else {
103 define('Auth_OpenID_HMACSHA256_SUPPORTED', false);
104 }
105