74 lines
2.1 KiB
C++
74 lines
2.1 KiB
C++
// Copyright (c) 2012-2014, The CryptoNote developers, The Bytecoin developers
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//
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// This file is part of Bytecoin.
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//
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// Bytecoin is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Bytecoin is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with Bytecoin. If not, see <http://www.gnu.org/licenses/>.
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#include <cstdint>
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#include <cstdlib>
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#include <cstring>
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#include <limits>
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#include "crypto/hash.h"
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#include "cryptonote_core/difficulty.h"
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using namespace std;
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using cryptonote::check_hash;
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int main(int argc, char *argv[]) {
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crypto::hash h;
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for (uint64_t diff = 1;; diff += 1 + (diff >> 8)) {
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for (int b = 0; b < 256; b++) {
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memset(&h, b, sizeof(crypto::hash));
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if (check_hash(h, diff) != (b == 0 || diff <= 255 / b)) {
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return 1;
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}
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if (b > 0) {
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memset(&h, 0, sizeof(crypto::hash));
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((char *) &h)[31] = b;
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if (check_hash(h, diff) != (diff <= 255 / b)) {
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return 1;
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}
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}
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}
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if (diff < numeric_limits<uint64_t>::max() / 256) {
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uint64_t val = 0;
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for (int i = 31; i >= 0; i--) {
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val = val * 256 + 255;
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((char *) &h)[i] = static_cast<char>(val / diff);
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val %= diff;
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}
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if (check_hash(h, diff) != true) {
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return 1;
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}
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if (diff > 1) {
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for (int i = 0;; i++) {
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if (i >= 32) {
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abort();
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}
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if (++((char *) &h)[i] != 0) {
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break;
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}
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}
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if (check_hash(h, diff) != false) {
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return 1;
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}
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}
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}
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if (diff + 1 + (diff >> 8) < diff) {
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break;
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}
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}
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return 0;
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}
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