class.ilPasswordUtils.php

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<?php declare(strict_types=1);
/* Copyright (c) 1998-2014 ILIAS open source, Extended GPL, see docs/LICENSE */

class ilPasswordUtils
{
    public static function getBytes(int $length) : string
    {
        try {
            return random_bytes($length);
        } catch (Throwable $ex) {
            if (!defined('PHP_WINDOWS_VERSION_BUILD') && extension_loaded('openssl')) {
                $secure = null;
                $rand = openssl_random_pseudo_bytes($length, $secure);
                if (false !== $rand && $secure === true) {
                    return $rand;
                }
            }

            $rand = '';
            for ($i = 0; $i < $length; ++$i) {
                $rand .= chr(random_int(0, 255));
            }

            return $rand;
        }
    }
}