/**************************************************************************/ /* dxil_hash.cpp */ /**************************************************************************/ /* This file is part of: */ /* GODOT ENGINE */ /* https://godotengine.org */ /**************************************************************************/ /* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */ /* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */ /* */ /* Permission is hereby granted, free of charge, to any person obtaining */ /* a copy of this software and associated documentation files (the */ /* "Software"), to deal in the Software without restriction, including */ /* without limitation the rights to use, copy, modify, merge, publish, */ /* distribute, sublicense, and/or sell copies of the Software, and to */ /* permit persons to whom the Software is furnished to do so, subject to */ /* the following conditions: */ /* */ /* The above copyright notice and this permission notice shall be */ /* included in all copies or substantial portions of the Software. */ /* */ /* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */ /* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */ /* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */ /* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */ /* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */ /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */ /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ /**************************************************************************/ // Based on the patched public domain implementation released by Microsoft here: // https://github.com/microsoft/hlsl-specs/blob/main/proposals/infra/INF-0004-validator-hashing.md #include "dxil_hash.h" #include #define S11 7 #define S12 12 #define S13 17 #define S14 22 #define S21 5 #define S22 9 #define S23 14 #define S24 20 #define S31 4 #define S32 11 #define S33 16 #define S34 23 #define S41 6 #define S42 10 #define S43 15 #define S44 21 static const BYTE padding[64] = { 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; static void FF(UINT &a, UINT b, UINT c, UINT d, UINT x, UINT8 s, UINT ac) { a += ((b & c) | (~b & d)) + x + ac; a = ((a << s) | (a >> (32 - s))) + b; } static void GG(UINT &a, UINT b, UINT c, UINT d, UINT x, UINT8 s, UINT ac) { a += ((b & d) | (c & ~d)) + x + ac; a = ((a << s) | (a >> (32 - s))) + b; } static void HH(UINT &a, UINT b, UINT c, UINT d, UINT x, UINT8 s, UINT ac) { a += (b ^ c ^ d) + x + ac; a = ((a << s) | (a >> (32 - s))) + b; } static void II(UINT &a, UINT b, UINT c, UINT d, UINT x, UINT8 s, UINT ac) { a += (c ^ (b | ~d)) + x + ac; a = ((a << s) | (a >> (32 - s))) + b; } void compute_dxil_hash(const BYTE *pData, UINT byteCount, BYTE *pOutHash) { UINT leftOver = byteCount & 0x3f; UINT padAmount; bool bTwoRowsPadding = false; if (leftOver < 56) { padAmount = 56 - leftOver; } else { padAmount = 120 - leftOver; bTwoRowsPadding = true; } UINT padAmountPlusSize = padAmount + 8; UINT state[4] = { 0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476 }; UINT N = (byteCount + padAmountPlusSize) >> 6; UINT offset = 0; UINT NextEndState = bTwoRowsPadding ? N - 2 : N - 1; const BYTE *pCurrData = pData; for (UINT i = 0; i < N; i++, offset += 64, pCurrData += 64) { UINT x[16]; const UINT *pX; if (i == NextEndState) { if (!bTwoRowsPadding && i == N - 1) { UINT remainder = byteCount - offset; x[0] = byteCount << 3; memcpy((BYTE *)x + 4, pCurrData, remainder); memcpy((BYTE *)x + 4 + remainder, padding, padAmount); x[15] = 1 | (byteCount << 1); } else if (bTwoRowsPadding) { if (i == N - 2) { UINT remainder = byteCount - offset; memcpy(x, pCurrData, remainder); memcpy((BYTE *)x + remainder, padding, padAmount - 56); NextEndState = N - 1; } else if (i == N - 1) { x[0] = byteCount << 3; memcpy((BYTE *)x + 4, padding + padAmount - 56, 56); x[15] = 1 | (byteCount << 1); } } pX = x; } else { pX = (const UINT *)pCurrData; } UINT a = state[0]; UINT b = state[1]; UINT c = state[2]; UINT d = state[3]; /* Round 1 */ FF(a, b, c, d, pX[0], S11, 0xd76aa478); /* 1 */ FF(d, a, b, c, pX[1], S12, 0xe8c7b756); /* 2 */ FF(c, d, a, b, pX[2], S13, 0x242070db); /* 3 */ FF(b, c, d, a, pX[3], S14, 0xc1bdceee); /* 4 */ FF(a, b, c, d, pX[4], S11, 0xf57c0faf); /* 5 */ FF(d, a, b, c, pX[5], S12, 0x4787c62a); /* 6 */ FF(c, d, a, b, pX[6], S13, 0xa8304613); /* 7 */ FF(b, c, d, a, pX[7], S14, 0xfd469501); /* 8 */ FF(a, b, c, d, pX[8], S11, 0x698098d8); /* 9 */ FF(d, a, b, c, pX[9], S12, 0x8b44f7af); /* 10 */ FF(c, d, a, b, pX[10], S13, 0xffff5bb1); /* 11 */ FF(b, c, d, a, pX[11], S14, 0x895cd7be); /* 12 */ FF(a, b, c, d, pX[12], S11, 0x6b901122); /* 13 */ FF(d, a, b, c, pX[13], S12, 0xfd987193); /* 14 */ FF(c, d, a, b, pX[14], S13, 0xa679438e); /* 15 */ FF(b, c, d, a, pX[15], S14, 0x49b40821); /* 16 */ /* Round 2 */ GG(a, b, c, d, pX[1], S21, 0xf61e2562); /* 17 */ GG(d, a, b, c, pX[6], S22, 0xc040b340); /* 18 */ GG(c, d, a, b, pX[11], S23, 0x265e5a51); /* 19 */ GG(b, c, d, a, pX[0], S24, 0xe9b6c7aa); /* 20 */ GG(a, b, c, d, pX[5], S21, 0xd62f105d); /* 21 */ GG(d, a, b, c, pX[10], S22, 0x2441453); /* 22 */ GG(c, d, a, b, pX[15], S23, 0xd8a1e681); /* 23 */ GG(b, c, d, a, pX[4], S24, 0xe7d3fbc8); /* 24 */ GG(a, b, c, d, pX[9], S21, 0x21e1cde6); /* 25 */ GG(d, a, b, c, pX[14], S22, 0xc33707d6); /* 26 */ GG(c, d, a, b, pX[3], S23, 0xf4d50d87); /* 27 */ GG(b, c, d, a, pX[8], S24, 0x455a14ed); /* 28 */ GG(a, b, c, d, pX[13], S21, 0xa9e3e905); /* 29 */ GG(d, a, b, c, pX[2], S22, 0xfcefa3f8); /* 30 */ GG(c, d, a, b, pX[7], S23, 0x676f02d9); /* 31 */ GG(b, c, d, a, pX[12], S24, 0x8d2a4c8a); /* 32 */ /* Round 3 */ HH(a, b, c, d, pX[5], S31, 0xfffa3942); /* 33 */ HH(d, a, b, c, pX[8], S32, 0x8771f681); /* 34 */ HH(c, d, a, b, pX[11], S33, 0x6d9d6122); /* 35 */ HH(b, c, d, a, pX[14], S34, 0xfde5380c); /* 36 */ HH(a, b, c, d, pX[1], S31, 0xa4beea44); /* 37 */ HH(d, a, b, c, pX[4], S32, 0x4bdecfa9); /* 38 */ HH(c, d, a, b, pX[7], S33, 0xf6bb4b60); /* 39 */ HH(b, c, d, a, pX[10], S34, 0xbebfbc70); /* 40 */ HH(a, b, c, d, pX[13], S31, 0x289b7ec6); /* 41 */ HH(d, a, b, c, pX[0], S32, 0xeaa127fa); /* 42 */ HH(c, d, a, b, pX[3], S33, 0xd4ef3085); /* 43 */ HH(b, c, d, a, pX[6], S34, 0x4881d05); /* 44 */ HH(a, b, c, d, pX[9], S31, 0xd9d4d039); /* 45 */ HH(d, a, b, c, pX[12], S32, 0xe6db99e5); /* 46 */ HH(c, d, a, b, pX[15], S33, 0x1fa27cf8); /* 47 */ HH(b, c, d, a, pX[2], S34, 0xc4ac5665); /* 48 */ /* Round 4 */ II(a, b, c, d, pX[0], S41, 0xf4292244); /* 49 */ II(d, a, b, c, pX[7], S42, 0x432aff97); /* 50 */ II(c, d, a, b, pX[14], S43, 0xab9423a7); /* 51 */ II(b, c, d, a, pX[5], S44, 0xfc93a039); /* 52 */ II(a, b, c, d, pX[12], S41, 0x655b59c3); /* 53 */ II(d, a, b, c, pX[3], S42, 0x8f0ccc92); /* 54 */ II(c, d, a, b, pX[10], S43, 0xffeff47d); /* 55 */ II(b, c, d, a, pX[1], S44, 0x85845dd1); /* 56 */ II(a, b, c, d, pX[8], S41, 0x6fa87e4f); /* 57 */ II(d, a, b, c, pX[15], S42, 0xfe2ce6e0); /* 58 */ II(c, d, a, b, pX[6], S43, 0xa3014314); /* 59 */ II(b, c, d, a, pX[13], S44, 0x4e0811a1); /* 60 */ II(a, b, c, d, pX[4], S41, 0xf7537e82); /* 61 */ II(d, a, b, c, pX[11], S42, 0xbd3af235); /* 62 */ II(c, d, a, b, pX[2], S43, 0x2ad7d2bb); /* 63 */ II(b, c, d, a, pX[9], S44, 0xeb86d391); /* 64 */ state[0] += a; state[1] += b; state[2] += c; state[3] += d; } memcpy(pOutHash, state, 16); }