Jose\Algorithm\ContentEncryption\AESGCM::decryptContent PHP Метод

    public function decryptContent($data, $cek, $iv, $aad, $encoded_protected_header, $tag)
    {
        $calculated_aad = $encoded_protected_header;
        if (null !== $aad) {
            $calculated_aad .= '.' . $aad;
        }
        if (version_compare(PHP_VERSION, '7.1.0') >= 0) {
            return openssl_decrypt($data, $this->getMode($cek), $cek, OPENSSL_RAW_DATA, $iv, $tag, $calculated_aad);
        } elseif (class_exists('\\Crypto\\Cipher')) {
            $cipher = Cipher::aes(Cipher::MODE_GCM, $this->getKeySize());
            $cipher->setTag($tag);
            $cipher->setAAD($calculated_aad);
            $plaintext = $cipher->decrypt($data, $cek, $iv);
            return $plaintext;
        }
        return GCM::decrypt($cek, $iv, $data, $calculated_aad, $tag);
    }