blockchain/src/crypto/hash.h

// Copyright (c) 2014-2018 Zano Project
// Copyright (c) 2014-2018 The Louisdor Project
// Copyright (c) 2012-2013 The Boolberry developers
// Copyright (c) 2017-2025 Lethean (https://lt.hn)
//
// Licensed under the European Union Public Licence (EUPL) version 1.2.
// You may obtain a copy of the licence at:
//
//     https://joinup.ec.europa.eu/software/page/eupl/licence-eupl
//
// The EUPL is a copyleft licence that is compatible with the MIT/X11
// licence used by the original projects; the MIT terms are therefore
// considered “grandfathered” under the EUPL for this code.
//
// SPDX‑License‑Identifier: EUPL-1.2
//

#pragma once

#include <stddef.h>

#include "common/pod-class.h"
#include "generic-ops.h"
#include "warnings.h"
PUSH_VS_WARNINGS
DISABLE_VS_WARNINGS(4804)
#include "blake2.h"
POP_VS_WARNINGS
namespace crypto {

  extern "C" {
#include "hash-ops.h"
  }

#pragma pack(push, 1)
  POD_CLASS hash {
    char data[HASH_SIZE];
  };
#pragma pack(pop)

  static_assert(sizeof(hash) == HASH_SIZE, "Invalid structure size");

  /*
    Cryptonight hash functions
  */

  inline void cn_fast_hash(const void *data, std::size_t length, hash &hash) {
    cn_fast_hash(data, length, reinterpret_cast<char *>(&hash));
  }

  inline hash cn_fast_hash(const void *data, std::size_t length) {
    hash h;
    cn_fast_hash(data, length, reinterpret_cast<char *>(&h));
    return h;
  }

  inline void tree_hash(const hash *hashes, std::size_t count, hash &root_hash) {
    tree_hash(reinterpret_cast<const char (*)[HASH_SIZE]>(hashes), count, reinterpret_cast<char *>(&root_hash));
  }

  inline hash blake2_hash(const void *data, std::size_t length) {
    hash h;
    blake2(&h, sizeof(h), data, length, nullptr, 0);
    return h;
  }

}

POD_MAKE_HASHABLE(crypto, hash)