Zend\Math\Math::randBytes fix

gistfile1.aw

public static function randBytes($length, $strong = false)
    {
        if ($length <= 0) {
            return false;
        }
        if (extension_loaded('openssl')) {
            $rand = openssl_random_pseudo_bytes($length, $secure);
            if ($secure === true) {
                return $rand;
            }
        }
        if (extension_loaded('mcrypt')) {
            $rand = mcrypt_create_iv($length, MCRYPT_DEV_URANDOM);
            if ($rand !== false && strlen($rand) === $length) {
                return $rand;
            }
        }
        if ($strong) {
            throw new Exception\RuntimeException(
                'This PHP environment doesn\'t support secure random number generation. ' .
                'Please consider to install the OpenSSL and/or Mcrypt extensions'
            );
        }
        $rand = '';
        for ($i = 0; $i < $length; $i++) {
            $rand .= chr(mt_rand(0, 255));
        }
        return $rand;
    }