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