lithium\storage\session\strategy\Hmac::read PHP Метод

    public function read($data, array $options = array())
    {
        if ($data === null) {
            return $data;
        }
        $class = $options['class'];
        $currentData = $class::read(null, array('strategies' => false));
        if (!isset($currentData['__signature'])) {
            throw new MissingSignatureException('HMAC signature not found.');
        }
        if (String::compare($currentData['__signature'], static::_signature($currentData))) {
            return $data;
        }
        throw new RuntimeException('Possible data tampering: HMAC signature does not match data.');
    }