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29 lines
586 B
PHP
29 lines
586 B
PHP
<?php
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/* vim: set expandtab sw=4 ts=4 sts=4: */
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/**
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* The hash extension polyfills.
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*
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* @package PhpMyAdmin
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*/
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if (! defined('PHPMYADMIN')) {
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exit;
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}
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/* Compatibility with PHP < 5.6 */
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if (! function_exists('hash_equals')) {
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/**
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* Timing attack safe string comparison
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*
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* @param string $a first string
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* @param string $b second string
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*
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* @return boolean whether they are equal
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*/
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function hash_equals($a, $b) {
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$ret = strlen($a) ^ strlen($b);
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$ret |= array_sum(unpack("C*", $a ^ $b));
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return ! $ret;
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}
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}
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