Psecio\Jwt\Jwt::decrypt PHP Method

    public function decrypt($data, $algorithm, $iv, $key)
    {
        if (!function_exists('openssl_encrypt')) {
            throw new \RuntimeException('Cannot encrypt data, OpenSSL not enabled');
        }
        // Decrypt just the claims
        $sections = explode('.', $data);
        if (count($sections) < 3) {
            throw new Exception\DecodeException('Invalid number of sections (<3)');
        }
        $claims = openssl_decrypt($this->base64Decode($sections[1]), $algorithm, $key, false, $iv);
        return json_decode($claims);
    }