monero/tests/performance_tests/multiexp.h

// Copyright (c) 2018, The Monero Project
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// Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers

#pragma once

#include <vector>
#include "ringct/rctOps.h"
#include "ringct/multiexp.h"

enum test_multiexp_algorithm
{
  multiexp_bos_coster,
  multiexp_straus,
  multiexp_straus_cached,
};

template<test_multiexp_algorithm algorithm, size_t npoints>
class test_multiexp
{
public:
  static const size_t loop_count = npoints >= 1024 ? 10 : npoints < 256 ? 1000 : 100;

  bool init()
  {
    data.resize(npoints);
    res = rct::identity();
    for (size_t n = 0; n < npoints; ++n)
    {
      data[n].scalar = rct::skGen();
      rct::key point = rct::scalarmultBase(rct::skGen());
      if (ge_frombytes_vartime(&data[n].point, point.bytes))
        return false;
      rct::key kn = rct::scalarmultKey(point, data[n].scalar);
      res = rct::addKeys(res, kn);
    }
    cache = rct::straus_init_cache(data);
    return true;
  }

  bool test()
  {
    switch (algorithm)
    {
      case multiexp_bos_coster:
        return res == bos_coster_heap_conv_robust(data);
      case multiexp_straus:
        return res == straus(data);
      case multiexp_straus_cached:
        return res == straus(data, cache);
      default:
        return false;
    }
  }

private:
  std::vector<rct::MultiexpData> data;
  std::shared_ptr<rct::straus_cached_data> cache;
  rct::key res;
};