61 lines
1.4 KiB
C++
61 lines
1.4 KiB
C++
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/***
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Copyright (C) 2022 J Reece Wilson (a/k/a "Reece"). All rights reserved.
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File: HashCash.cpp
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Date: 2022-9-18
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Author: Reece
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***/
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#include <Source/RuntimeInternal.hpp>
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#include "HashCash.hpp"
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namespace Aurora::Crypto::HashCash
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{
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AUKN_SYM bool CheckSalt(AuUInt64 token, AuUInt8 power, const HashCashAnswer &answer)
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{
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AuUInt8 count {};
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AuArray<AuUInt8, 16> hashBuffer;
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struct Hash
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{
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AuUInt64 token;
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AuUInt64 y;
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} hash;
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static_assert(sizeof(Hash) == 16);
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hash.token = token;
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hash.y = answer.y;
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AuHashing::RMD128(AuMemoryViewRead(&hash, 16), hashBuffer);
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AuBitScanForward(count, AuReadU64LE(hashBuffer.data(), 0));
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return count == power;
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}
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AUKN_SYM HashCashAnswer FindAnswer(AuUInt64 token, AuUInt8 power)
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{
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HashCashAnswer answer;
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AuArray<AuUInt8, 16> hashBuffer;
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struct Hash
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{
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AuUInt64 token;
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AuUInt64 y;
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} hash;
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static_assert(sizeof(Hash) == 16);
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hash.token = token;
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hash.y = AuRng::RngU64();
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AuUInt8 count {};
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do
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{
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hash.y++;
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AuHashing::RMD128(AuMemoryViewRead(&hash, 16), hashBuffer);
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}
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while (AuBitScanForward(count, AuReadU64LE(hashBuffer.data(), 0)), count != power);
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answer.y = hash.y;
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return answer;
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}
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}
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