Verzeichnisstruktur phpBB-3.2.0
- Veröffentlicht
- 06.01.2017
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Php55.php
01 <?php
02
03 /*
04 * This file is part of the Symfony package.
05 *
06 * (c) Fabien Potencier <fabien@symfony.com>
07 *
08 * For the full copyright and license information, please view the LICENSE
09 * file that was distributed with this source code.
10 */
11
12 namespace Symfony\Polyfill\Php55;
13
14 /**
15 * @internal
16 */
17 final class Php55
18 {
19 public static function boolval($val)
20 {
21 return (bool) $val;
22 }
23
24 public static function json_last_error_msg()
25 {
26 switch (json_last_error()) {
27 case JSON_ERROR_NONE: return 'No error';
28 case JSON_ERROR_DEPTH: return 'Maximum stack depth exceeded';
29 case JSON_ERROR_STATE_MISMATCH: return 'State mismatch (invalid or malformed JSON)';
30 case JSON_ERROR_CTRL_CHAR: return 'Control character error, possibly incorrectly encoded';
31 case JSON_ERROR_SYNTAX: return 'Syntax error';
32 case JSON_ERROR_UTF8: return 'Malformed UTF-8 characters, possibly incorrectly encoded';
33 default: return 'Unknown error';
34 }
35 }
36
37 /**
38 * @author Sebastiaan Stok <s.stok@rollerscapes.net>
39 */
40 public static function hash_pbkdf2($algorithm, $password, $salt, $iterations, $length = 0, $rawOutput = false)
41 {
42 // Number of blocks needed to create the derived key
43 $blocks = ceil($length / strlen(hash($algorithm, null, true)));
44 $digest = '';
45
46 for ($i = 1; $i <= $blocks; ++$i) {
47 $ib = $block = hash_hmac($algorithm, $salt.pack('N', $i), $password, true);
48
49 // Iterations
50 for ($j = 1; $j < $iterations; ++$j) {
51 $ib ^= ($block = hash_hmac($algorithm, $block, $password, true));
52 }
53
54 $digest .= $ib;
55 }
56
57 if (!$rawOutput) {
58 $digest = bin2hex($digest);
59 }
60
61 return substr($digest, 0, $length);
62 }
63 }
64