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- <?php
- /*
- * This file is part of the Symfony package.
- *
- * (c) Fabien Potencier <fabien@symfony.com>
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
- namespace Symfony\Polyfill\Php55;
- /**
- * @internal
- */
- final class Php55
- {
- public static function boolval($val)
- {
- return (bool) $val;
- }
- public static function json_last_error_msg()
- {
- switch (json_last_error()) {
- case JSON_ERROR_NONE: return 'No error';
- case JSON_ERROR_DEPTH: return 'Maximum stack depth exceeded';
- case JSON_ERROR_STATE_MISMATCH: return 'State mismatch (invalid or malformed JSON)';
- case JSON_ERROR_CTRL_CHAR: return 'Control character error, possibly incorrectly encoded';
- case JSON_ERROR_SYNTAX: return 'Syntax error';
- case JSON_ERROR_UTF8: return 'Malformed UTF-8 characters, possibly incorrectly encoded';
- default: return 'Unknown error';
- }
- }
- /**
- * @author Sebastiaan Stok <s.stok@rollerscapes.net>
- */
- public static function hash_pbkdf2($algorithm, $password, $salt, $iterations, $length = 0, $rawOutput = false)
- {
- // Number of blocks needed to create the derived key
- $blocks = ceil($length / strlen(hash($algorithm, null, true)));
- $digest = '';
- for ($i = 1; $i <= $blocks; ++$i) {
- $ib = $block = hash_hmac($algorithm, $salt.pack('N', $i), $password, true);
- // Iterations
- for ($j = 1; $j < $iterations; ++$j) {
- $ib ^= ($block = hash_hmac($algorithm, $block, $password, true));
- }
- $digest .= $ib;
- }
- if (!$rawOutput) {
- $digest = bin2hex($digest);
- }
- return substr($digest, 0, $length);
- }
- }
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