246 lines
9.1 KiB
C++
246 lines
9.1 KiB
C++
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// Copyright Low Entry. Apache License, Version 2.0.
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#include "LowEntryHashingSha512Library.h"
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constexpr int64 ULowEntryHashingSha512Library::k[80] = {0x428a2f98d728ae22, 0x7137449123ef65cd, static_cast<int64>(0xb5c0fbcfec4d3b2f), static_cast<int64>(0xe9b5dba58189dbbc), 0x3956c25bf348b538, 0x59f111f1b605d019, static_cast<int64>(0x923f82a4af194f9b), static_cast<int64>(0xab1c5ed5da6d8118), static_cast<int64>(0xd807aa98a3030242), 0x12835b0145706fbe, 0x243185be4ee4b28c, 0x550c7dc3d5ffb4e2, 0x72be5d74f27b896f, static_cast<int64>(0x80deb1fe3b1696b1), static_cast<int64>(0x9bdc06a725c71235), static_cast<int64>(0xc19bf174cf692694), static_cast<int64>(0xe49b69c19ef14ad2), static_cast<int64>(0xefbe4786384f25e3), 0x0fc19dc68b8cd5b5, 0x240ca1cc77ac9c65, 0x2de92c6f592b0275, 0x4a7484aa6ea6e483, 0x5cb0a9dcbd41fbd4, 0x76f988da831153b5, static_cast<int64>(0x983e5152ee66dfab), static_cast<int64>(0xa831c66d2db43210), static_cast<int64>(0xb00327c898fb213f), static_cast<int64>(0xbf597fc7beef0ee4), static_cast<int64>(0xc6e00bf33da88fc2), static_cast<int64>(0xd5a79147930aa725), 0x06ca6351e003826f, 0x142929670a0e6e70, 0x27b70a8546d22ffc, 0x2e1b21385c26c926, 0x4d2c6dfc5ac42aed, 0x53380d139d95b3df, 0x650a73548baf63de, 0x766a0abb3c77b2a8, static_cast<int64>(0x81c2c92e47edaee6), static_cast<int64>(0x92722c851482353b), static_cast<int64>(0xa2bfe8a14cf10364), static_cast<int64>(0xa81a664bbc423001), static_cast<int64>(0xc24b8b70d0f89791), static_cast<int64>(0xc76c51a30654be30), static_cast<int64>(0xd192e819d6ef5218), static_cast<int64>(0xd69906245565a910), static_cast<int64>(0xf40e35855771202a), 0x106aa07032bbd1b8, 0x19a4c116b8d2d0c8, 0x1e376c085141ab53, 0x2748774cdf8eeb99, 0x34b0bcb5e19b48a8, 0x391c0cb3c5c95a63, 0x4ed8aa4ae3418acb, 0x5b9cca4f7763e373, 0x682e6ff3d6b2b8a3, 0x748f82ee5defb2fc, 0x78a5636f43172f60, static_cast<int64>(0x84c87814a1f0ab72), static_cast<int64>(0x8cc702081a6439ec), static_cast<int64>(0x90befffa23631e28), static_cast<int64>(0xa4506cebde82bde9), static_cast<int64>(0xbef9a3f7b2c67915), static_cast<int64>(0xc67178f2e372532b), static_cast<int64>(0xca273eceea26619c), static_cast<int64>(0xd186b8c721c0c207), static_cast<int64>(0xeada7dd6cde0eb1e), static_cast<int64>(0xf57d4f7fee6ed178), 0x06f067aa72176fba, 0x0a637dc5a2c898a6, 0x113f9804bef90dae, 0x1b710b35131c471b, 0x28db77f523047d84, 0x32caab7b40c72493, 0x3c9ebe0a15c9bebc, 0x431d67c49c100d4c, 0x4cc5d4becb3e42b6, 0x597f299cfc657e2a, 0x5fcb6fab3ad6faec, 0x6c44198c4a475817};
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void ULowEntryHashingSha512Library::initialize()
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{
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w.SetNum(80);
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buffer.SetNum(128);
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}
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void ULowEntryHashingSha512Library::update(const TArray<uint8>& b, const int64 offset, const int64 len)
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{
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int32 n = count % BLOCK_SIZE;
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count += len;
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int64 partLen = BLOCK_SIZE - n;
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int64 i = 0;
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if (len >= partLen)
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{
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for (int32 index = 0; index < partLen; index++)
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{
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buffer[n + index] = b[offset + index];
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}
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sha(buffer, 0);
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for (i = partLen; ((i + BLOCK_SIZE) - 1) < len; i += BLOCK_SIZE)
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{
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sha(b, offset + i);
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}
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n = 0;
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}
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if (i < len)
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{
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for (int32 index = 0; index < len - i; index++)
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{
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buffer[n + index] = b[offset + i + index];
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}
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}
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}
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TArray<uint8> ULowEntryHashingSha512Library::digest()
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{
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TArray<uint8> tail = padBuffer();
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update(tail, 0, tail.Num());
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return getResult();
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}
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TArray<uint8> ULowEntryHashingSha512Library::padBuffer()
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{
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int32 n = count % BLOCK_SIZE;
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int32 padding = (n < 112) ? (112 - n) : (240 - n);
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TArray<uint8> result;
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result.SetNum(padding + 16);
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result[0] = static_cast<uint8>(0x80);
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uint64 bits = count << 3;
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padding += 8;
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result[padding + 0] = static_cast<uint8>(bits >> 56);
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result[padding + 1] = static_cast<uint8>(bits >> 48);
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result[padding + 2] = static_cast<uint8>(bits >> 40);
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result[padding + 3] = static_cast<uint8>(bits >> 32);
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result[padding + 4] = static_cast<uint8>(bits >> 24);
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result[padding + 5] = static_cast<uint8>(bits >> 16);
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result[padding + 6] = static_cast<uint8>(bits >> 8);
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result[padding + 7] = static_cast<uint8>(bits);
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return result;
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}
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TArray<uint8> ULowEntryHashingSha512Library::getResult()
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{
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TArray<uint8> result;
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result.SetNum(64);
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result[0] = static_cast<uint8>(h0 >> 56);
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result[1] = static_cast<uint8>(h0 >> 48);
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result[2] = static_cast<uint8>(h0 >> 40);
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result[3] = static_cast<uint8>(h0 >> 32);
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result[4] = static_cast<uint8>(h0 >> 24);
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result[5] = static_cast<uint8>(h0 >> 16);
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result[6] = static_cast<uint8>(h0 >> 8);
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result[7] = static_cast<uint8>(h0);
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result[8] = static_cast<uint8>(h1 >> 56);
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result[9] = static_cast<uint8>(h1 >> 48);
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result[10] = static_cast<uint8>(h1 >> 40);
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result[11] = static_cast<uint8>(h1 >> 32);
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result[12] = static_cast<uint8>(h1 >> 24);
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result[13] = static_cast<uint8>(h1 >> 16);
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result[14] = static_cast<uint8>(h1 >> 8);
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result[15] = static_cast<uint8>(h1);
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result[16] = static_cast<uint8>(h2 >> 56);
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result[17] = static_cast<uint8>(h2 >> 48);
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result[18] = static_cast<uint8>(h2 >> 40);
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result[19] = static_cast<uint8>(h2 >> 32);
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result[20] = static_cast<uint8>(h2 >> 24);
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result[21] = static_cast<uint8>(h2 >> 16);
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result[22] = static_cast<uint8>(h2 >> 8);
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result[23] = static_cast<uint8>(h2);
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result[24] = static_cast<uint8>(h3 >> 56);
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result[25] = static_cast<uint8>(h3 >> 48);
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result[26] = static_cast<uint8>(h3 >> 40);
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result[27] = static_cast<uint8>(h3 >> 32);
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result[28] = static_cast<uint8>(h3 >> 24);
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result[29] = static_cast<uint8>(h3 >> 16);
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result[30] = static_cast<uint8>(h3 >> 8);
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result[31] = static_cast<uint8>(h3);
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result[32] = static_cast<uint8>(h4 >> 56);
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result[33] = static_cast<uint8>(h4 >> 48);
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result[34] = static_cast<uint8>(h4 >> 40);
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result[35] = static_cast<uint8>(h4 >> 32);
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result[36] = static_cast<uint8>(h4 >> 24);
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result[37] = static_cast<uint8>(h4 >> 16);
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result[38] = static_cast<uint8>(h4 >> 8);
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result[39] = static_cast<uint8>(h4);
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result[40] = static_cast<uint8>(h5 >> 56);
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result[41] = static_cast<uint8>(h5 >> 48);
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result[42] = static_cast<uint8>(h5 >> 40);
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result[43] = static_cast<uint8>(h5 >> 32);
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result[44] = static_cast<uint8>(h5 >> 24);
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result[45] = static_cast<uint8>(h5 >> 16);
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result[46] = static_cast<uint8>(h5 >> 8);
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result[47] = static_cast<uint8>(h5);
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result[48] = static_cast<uint8>(h6 >> 56);
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result[49] = static_cast<uint8>(h6 >> 48);
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result[50] = static_cast<uint8>(h6 >> 40);
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result[51] = static_cast<uint8>(h6 >> 32);
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result[52] = static_cast<uint8>(h6 >> 24);
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result[53] = static_cast<uint8>(h6 >> 16);
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result[54] = static_cast<uint8>(h6 >> 8);
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result[55] = static_cast<uint8>(h6);
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result[56] = static_cast<uint8>(h7 >> 56);
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result[57] = static_cast<uint8>(h7 >> 48);
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result[58] = static_cast<uint8>(h7 >> 40);
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result[59] = static_cast<uint8>(h7 >> 32);
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result[60] = static_cast<uint8>(h7 >> 24);
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result[61] = static_cast<uint8>(h7 >> 16);
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result[62] = static_cast<uint8>(h7 >> 8);
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result[63] = static_cast<uint8>(h7);
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return result;
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}
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void ULowEntryHashingSha512Library::sha(const TArray<uint8>& in, int64 offset)
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{
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int64 A = h0;
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int64 B = h1;
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int64 C = h2;
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int64 D = h3;
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int64 E = h4;
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int64 F = h5;
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int64 G = h6;
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int64 H = h7;
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uint64 T;
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uint64 T2;
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int32 r;
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for (r = 0; r < 16; r++)
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{
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w[r] = (static_cast<int64>(in[offset]) << 56) | ((static_cast<int64>(in[offset + 1]) & 0xFF) << 48) | ((static_cast<int64>(in[offset + 2]) & 0xFF) << 40) | ((static_cast<int64>(in[offset + 3]) & 0xFF) << 32) | ((static_cast<int64>(in[offset + 4]) & 0xFF) << 24) | ((static_cast<int64>(in[offset + 5]) & 0xFF) << 16) | ((static_cast<int64>(in[offset + 6]) & 0xFF) << 8) | (static_cast<int64>(in[offset + 7]) & 0xFF);
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offset += 8;
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}
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for (r = 16; r < 80; r++)
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{
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T = w[r - 2];
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T2 = w[r - 15];
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w[r] = ((s(T, 19) | (T << 45)) ^ (s(T, 61) | (T << 3)) ^ s(T, 6)) + w[r - 7] + ((s(T2, 1) | (T2 << 63)) ^ (s(T2, 8) | (T2 << 56)) ^ s(T2, 7)) + w[r - 16];
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}
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for (r = 0; r < 80; r++)
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{
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T = H + ((s(E, 14) | (E << 50)) ^ (s(E, 18) | (E << 46)) ^ (s(E, 41) | (E << 23))) + ((E & F) ^ ((~E) & G)) + k[r] + w[r];
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T2 = ((s(A, 28) | (A << 36)) ^ (s(A, 34) | (A << 30)) ^ (s(A, 39) | (A << 25))) + ((A & B) ^ (A & C) ^ (B & C));
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H = G;
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G = F;
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F = E;
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E = D + T;
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D = C;
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C = B;
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B = A;
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A = T + T2;
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}
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h0 += A;
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h1 += B;
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h2 += C;
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h3 += D;
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h4 += E;
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h5 += F;
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h6 += G;
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h7 += H;
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}
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int64 ULowEntryHashingSha512Library::s(const int64 a, const int32 b)
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{
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const uint64 A = a;
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const uint32 B = b;
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return (A >> B);
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}
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TArray<uint8> ULowEntryHashingSha512Library::Hash(const TArray<uint8>& Bytes)
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{
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ULowEntryHashingSha512Library instance = ULowEntryHashingSha512Library();
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instance.initialize();
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instance.update(Bytes, 0, Bytes.Num());
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return instance.digest();
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}
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TArray<uint8> ULowEntryHashingSha512Library::Hash(const TArray<uint8>& Bytes, int32 Index, int32 Length)
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{
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if (Bytes.Num() <= 0)
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{
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ULowEntryHashingSha512Library instance = ULowEntryHashingSha512Library();
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instance.initialize();
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return instance.digest();
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}
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if (Index < 0)
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{
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Length += Index;
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Index = 0;
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}
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if (Length > (Bytes.Num() - Index))
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{
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Length = Bytes.Num() - Index;
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}
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if (Length <= 0)
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{
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ULowEntryHashingSha512Library instance = ULowEntryHashingSha512Library();
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instance.initialize();
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return instance.digest();
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}
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ULowEntryHashingSha512Library instance = ULowEntryHashingSha512Library();
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instance.initialize();
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instance.update(Bytes, Index, Length);
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return instance.digest();
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}
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