46 lines
923 B
C
46 lines
923 B
C
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// Copyright Low Entry. Apache License, Version 2.0.
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#pragma once
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#include "CoreMinimal.h"
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class ULowEntryHashingSha256Library
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{
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private:
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const static int32 k[64];
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constexpr static int32 BLOCK_SIZE = 64;
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private:
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TArray<int32> w;
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int32 h0 = 0x6a09e667;
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int32 h1 = 0xbb67ae85;
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int32 h2 = 0x3c6ef372;
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int32 h3 = 0xa54ff53a;
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int32 h4 = 0x510e527f;
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int32 h5 = 0x9b05688c;
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int32 h6 = 0x1f83d9ab;
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int32 h7 = 0x5be0cd19;
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int64 count = 0;
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TArray<uint8> buffer;
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private:
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void initialize();
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void update(const TArray<uint8>& b, const int64 offset, const int64 len);
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TArray<uint8> digest();
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TArray<uint8> padBuffer();
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TArray<uint8> getResult();
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void sha(const TArray<uint8>& in, int64 offset);
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FORCEINLINE static int32 s(const int32 a, const int32 b);
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public:
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static TArray<uint8> Hash(const TArray<uint8>& Bytes);
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static TArray<uint8> Hash(const TArray<uint8>& Bytes, int32 Index, int32 Length);
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};
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