blockchain/src/crypto/crypto-sugar.cpp

// Copyright (c) 2020-2023 Zano Project
// Copyright (c) 2020-2023 sowle (val@zano.org, crypto.sowle@gmail.com)
// Distributed under the MIT/X11 software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
//
// Note: This file originates from tests/functional_tests/crypto_tests.cpp 

#include "crypto-sugar.h"

namespace crypto
{

  const point_pc_t    c_point_H         {{ 20574939, 16670001, -29137604, 14614582, 24883426, 3503293, 2667523, 420631, 2267646, -4769165, -11764015, -12206428, -14187565, -2328122, -16242653, -788308, -12595746, -8251557, -10110987, 853396, -4982135, 6035602, -21214320, 16156349, 977218, 2807645, 31002271, 5694305, -16054128, 5644146, -15047429, -568775, -22568195, -8089957, -27721961, -10101877, -29459620, -13359100, -31515170, -6994674 }};
  const point_pc_t    c_point_H2        {{ 1318371, 14804112, 12545972, -13482561, -12089798, -16020744, -21221907, -8410994, -33080606, 11275578, 3807637, 11185450, -23227561, -12892068, 1356866, -1025012, -8022738, -8139671, -20315029, -13916324, -6475650, -7025596, 12403179, -5139984, -12068178, 10445584, -14826705, -4927780, 13964546, 12525942, -2314107, -10566315, 32243863, 15603849, 5154154, 4276633, -20918372, -15718796, -26386151, 8434696 }};
  const point_pc_t    c_point_U         {{ 30807552, 984924, 23426137, -5598760, 7545909, 16325843, 993742, 2594106, -31962071, -959867, 16454190, -4091093, 1197656, 13586872, -9269020, -14133290, 1869274, 13360979, -24627258, -10663086, 2212027, 1198856, 20515811, 15870563, -23833732, 9839517, -19416306, 11567295, -4212053, 348531, -2671541, 484270, -19128078, 1236698, -16002690, 9321345, 9776066, 10711838, 11187722, -16371275 }};
  const point_pc_t    c_point_X         {{ 25635916, -5459446, 5768861, 5666160, -6357364, -12939311, 29490001, -4543704, -31266450, -2582476, 23705213, 9562626, -716512, 16560168, 7947407, 2039790, -2752711, 4742449, 3356761, 16338966, 17303421, -5790717, -5684800, 12062431, -3307947, 8139265, -26544839, 12058874, 3452748, 3359034, 26514848, -6060876, 31255039, 11154418, -21741975, -3782423, -19871841, 5729859, 21754676, -12454027 }};
  const point_pc_t    c_point_H_plus_G  {{ 12291435, 3330843, -3390294, 13894858, -1099584, -6848191, 12040668, -15950068, -7494633, 12566672, -5526901, -16645799, -31081168, -1095427, -13082463, 4573480, -11255691, 4344628, 33477173, 11137213, -3837023, -12436594, -8471924, -814016, 10785607, 9492721, 10992667, 7406385, -5687296, -127915, -6229107, -9324867, 558657, 6493750, 4895261, 12642545, 9549220, 696086, 21894285, -10521807 }};
  const point_pc_t    c_point_H_minus_G {{ -28347682, 3523701, -3380175, -14453727, 4238027, -6032522, 20235758, 4091609, 12557126, -8064113, 4212476, -13419094, -114185, -7650727, -24238, 16663404, 23676363, -6819610, 18286466, 8714527, -3837023, -12436594, -8471924, -814016, 10785607, 9492721, 10992667, 7406385, -5687296, -127915, -20450317, 13815641, -11604061, -447489, 27380225, 9400847, -8551293, -1173627, -28110171, 14241295 }};


  void construct_precomp_data(precomp_data_t precomp_data, const point_t& point)
  {
    point_t A = point;
    for(size_t i = 0; i < 32; ++i)
    {
      point_t B = A;
      ge_p3_to_precomp(&precomp_data[i][0], &B.m_p3);
      for(size_t j = 1; j < 8; ++j)
      {
        B += A; // B = (j+1) * 256^i * point
        ge_p3_to_precomp(&precomp_data[i][j], &B.m_p3);
      }

      if (i != 31)
        A.modify_mul_pow_2(8); // *= 256
    }
  }


} // namespace crypto