PowerDNS / pdns / 6456098068

/*

 * This file is part of PowerDNS or dnsdist.

 * Copyright -- PowerDNS.COM B.V. and its contributors

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of version 2 of the GNU General Public License as

 * published by the Free Software Foundation.

 *

 * In addition, for the avoidance of any doubt, permission is granted to

 * link this program with OpenSSL and to (re)distribute the binaries

 * produced as the result of such linking.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

 */

#pragma once

#include "config.h"

#include <array>

#include <string>

#include <cstdint>

#include <cstring>

#if defined(HAVE_LIBSODIUM)

#include <sodium.h>

#endif

struct SodiumNonce

{

  SodiumNonce(const SodiumNonce&) = default;

  SodiumNonce(SodiumNonce&&) = default;

  SodiumNonce& operator=(const SodiumNonce&) = default;

  SodiumNonce& operator=(SodiumNonce&&) = default;

  ~SodiumNonce() = default;

  void init();

  void merge(const SodiumNonce& lower, const SodiumNonce& higher);

  void increment();

#if !defined(HAVE_LIBSODIUM)

  std::array<unsigned char, 1> value{};

#else

  std::array<unsigned char, crypto_secretbox_NONCEBYTES> value{};

#endif

};

std::string sodEncryptSym(const std::string_view& msg, const std::string& key, SodiumNonce& nonce, bool incrementNonce = true);

std::string sodDecryptSym(const std::string_view& msg, const std::string& key, SodiumNonce& nonce, bool incrementNonce = true);

std::string newKey(bool base64Encoded = true);

bool sodIsValidKey(const std::string& key);

namespace dnsdist::crypto::authenticated

{

constexpr size_t getEncryptedSize(size_t plainTextSize)

}