mirror of
https://github.com/SChernykh/p2pool.git
synced 2025-01-23 18:55:51 +00:00
61 lines
1.6 KiB
C++
61 lines
1.6 KiB
C++
|
/*
|
||
|
|
* This file is part of the Monero P2Pool <https://github.com/SChernykh/p2pool>
|
||
|
|
* Copyright (c) 2021-2023 SChernykh <https://github.com/SChernykh>
|
||
|
|
*
|
||
|
|
* This program is free software: you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License as published by
|
||
|
|
* the Free Software Foundation, version 3.
|
||
|
|
*
|
||
|
|
* 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, see <http://www.gnu.org/licenses/>.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "common.h"
|
||
|
|
#include "keccak.h"
|
||
|
|
#include "merkle.h"
|
||
|
|
|
||
|
|
namespace p2pool {
|
||
|
|
|
||
|
|
void merkle_hash(const std::vector<hash>& hashes, hash& root)
|
||
|
|
{
|
||
|
|
const size_t count = hashes.size();
|
||
|
|
const uint8_t* h = hashes[0].h;
|
||
|
|
|
||
|
|
if (count == 1) {
|
||
|
|
root = hashes[0];
|
||
|
|
}
|
||
|
|
else if (count == 2) {
|
||
|
|
keccak(h, HASH_SIZE * 2, root.h);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
size_t cnt = 1;
|
||
|
|
do { cnt <<= 1; } while (cnt <= count);
|
||
|
|
cnt >>= 1;
|
||
|
|
|
||
|
|
std::vector<hash> tmp_ints(cnt);
|
||
|
|
|
||
|
|
const size_t k = cnt * 2 - count;
|
||
|
|
memcpy(tmp_ints.data(), h, k * HASH_SIZE);
|
||
|
|
|
||
|
|
for (size_t i = k, j = k; j < cnt; i += 2, ++j) {
|
||
|
|
keccak(h + i * HASH_SIZE, HASH_SIZE * 2, tmp_ints[j].h);
|
||
|
|
}
|
||
|
|
|
||
|
|
while (cnt > 2) {
|
||
|
|
cnt >>= 1;
|
||
|
|
for (size_t i = 0, j = 0; j < cnt; i += 2, ++j) {
|
||
|
|
keccak(tmp_ints[i].h, HASH_SIZE * 2, tmp_ints[j].h);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
keccak(tmp_ints[0].h, HASH_SIZE * 2, root.h);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace p2pool
|