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53 lines
1.5 KiB
53 lines
1.5 KiB
/*
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Copyright (c) 2019 tevador
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This file is part of RandomX.
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RandomX is free software: you can redistribute it and/or modify
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it under the terms of the GNU 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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RandomX 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 General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with RandomX. If not, see<http://www.gnu.org/licenses/>.
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*/
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#include <stddef.h>
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#include "blake2/blake2.h"
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#include "blake2/endian.h"
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#include "blake2_generator.hpp"
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namespace randomx {
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constexpr int maxSeedSize = 60;
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Blake2Generator::Blake2Generator(const void* seed, size_t seedSize, int nonce) : dataIndex(sizeof(data)) {
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memset(data, 0, sizeof(data));
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memcpy(data, seed, seedSize > maxSeedSize ? maxSeedSize : seedSize);
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store32(&data[maxSeedSize], nonce);
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}
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uint8_t Blake2Generator::getByte() {
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checkData(1);
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return data[dataIndex++];
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}
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uint32_t Blake2Generator::getInt32() {
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checkData(4);
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auto ret = load32(&data[dataIndex]);
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dataIndex += 4;
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return ret;
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}
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void Blake2Generator::checkData(const size_t bytesNeeded) {
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if (dataIndex + bytesNeeded > sizeof(data)) {
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blake2b(data, sizeof(data), data, sizeof(data), nullptr, 0);
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dataIndex = 0;
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}
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}
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} |