mirror of
https://github.com/monero-project/monero.git
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91f4c7f45f
Based on Boolberry work by: jahrsg <jahr@jahr.me> cr.zoidberg <crypto.zoidberg@gmail.com>
87 lines
3.0 KiB
C++
87 lines
3.0 KiB
C++
// Copyright (c) 2014-2019, The Monero Project
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification, are
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// permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice, this list of
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// conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list
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// of conditions and the following disclaimer in the documentation and/or other
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// materials provided with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its contributors may be
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// used to endorse or promote products derived from this software without specific
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// prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers
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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_basic/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 (cryptonote::difficulty_type diff = 1;; diff += 1 + (diff >> 8)) {
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for (uint16_t 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 2;
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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>(static_cast<uint64_t>(val / diff));
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val %= diff.convert_to<uint64_t>();
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}
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if (check_hash(h, diff) != true) {
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return 3;
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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 4;
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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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