monero/tests/performance_tests/equality.h

// Copyright (c) 2014-2022, The Monero Project
// 
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
// 
// 1. Redistributions of source code must retain the above copyright notice, this list of
//    conditions and the following disclaimer.
// 
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
//    of conditions and the following disclaimer in the documentation and/or other
//    materials provided with the distribution.
// 
// 3. Neither the name of the copyright holder nor the names of its contributors may be
//    used to endorse or promote products derived from this software without specific
//    prior written permission.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// 
// Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers

#pragma once

#include <string.h>
#include <sodium/crypto_verify_32.h>

struct memcmp32
{
  static const size_t loop_count = 10000000;
  static int call(const unsigned char *k0, const unsigned char *k1){ return memcmp(k0, k1, 32); }
};

struct verify32
{
  static const size_t loop_count = 10000000;
  static int call(const unsigned char *k0, const unsigned char *k1){ return crypto_verify_32(k0, k1); }
};

template<typename f, bool equal>
class test_equality
{
public:
  static const size_t loop_count = f::loop_count;

  bool init()
  {
    for (int n = 0; n < 32; ++n)
      k0[n] = n;
    for (int n = 0; n < 32; ++n)
      k1[n] = equal ? n : n + 1;
    return true;
  }

  bool test()
  {
    return equal == !f::call(k0, k1);
  }

private:
  unsigned char k0[32];
  unsigned char k1[32];
};