Encrypt method body

public function encrypt($value, $serialize = true)
    {
        $iv = random_bytes(openssl_cipher_iv_length($this->cipher));

        $value = \openssl_encrypt(
            $serialize ? serialize($value) : $value,
            $this->cipher, $this->key, 0, $iv
        );

        if ($value === false) {
            throw new EncryptException('Could not encrypt the data.');
        }

        $mac = $this->hash($iv = base64_encode($iv), $value);

        $json = json_encode(compact('iv', 'value', 'mac'), JSON_UNESCAPED_SLASHES);

        if (json_last_error() !== JSON_ERROR_NONE) {
            throw new EncryptException('Could not encrypt the data.');
        }

        return base64_encode($json);
    }