mirror of https://github.com/PCSX2/pcsx2.git
Common: Add MD5Digest
This commit is contained in:
Connor McLaughlin
refractionpcsx2
parent
b0a0d714c4
commit
cdb0068dcc
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@ -24,6 +24,7 @@ target_sources(common PRIVATE
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IniInterface.cpp
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Mutex.cpp
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Misc.cpp
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MD5Digest.cpp
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PathUtils.cpp
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PrecompiledHeader.cpp
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Perf.cpp
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@ -79,6 +80,7 @@ target_sources(common PRIVATE
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HashCombine.h
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MemcpyFast.h
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MemsetFast.inl
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MD5Digest.h
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Path.h
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PageFaultSource.h
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PrecompiledHeader.h
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@ -0,0 +1,222 @@
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/* PCSX2 - PS2 Emulator for PCs
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* Copyright (C) 2002-2021 PCSX2 Dev Team
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*
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* PCSX2 is free software: you can redistribute it and/or modify it under the terms
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* of the GNU Lesser General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* PCSX2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with PCSX2.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "MD5Digest.h"
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#include <cstring>
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// mostly based on this implementation (public domain): http://www.fourmilab.ch/md5/
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/* The four core functions - F1 is optimized somewhat */
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/* #define F1(x, y, z) (x & y | ~x & z) */
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#define F1(x, y, z) (z ^ (x & (y ^ z)))
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#define F2(x, y, z) F1(z, x, y)
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#define F3(x, y, z) (x ^ y ^ z)
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#define F4(x, y, z) (y ^ (x | ~z))
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/* This is the central step in the MD5 algorithm. */
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#define MD5STEP(f, w, x, y, z, data, s) (w += f(x, y, z) + data, w = w << s | w >> (32 - s), w += x)
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/*
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* The core of the MD5 algorithm, this alters an existing MD5 hash to
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* reflect the addition of 16 longwords of new data. MD5Update blocks
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* the data and converts bytes into longwords for this routine.
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*/
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static void MD5Transform(u32 buf[4], u32 in[16])
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{
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u32 a, b, c, d;
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a = buf[0];
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b = buf[1];
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c = buf[2];
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d = buf[3];
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MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
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MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
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MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
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MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
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MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
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MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
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MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
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MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
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MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
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MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
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MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
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MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
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MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
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MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
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MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
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MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
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MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
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MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
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MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
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MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
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MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
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MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
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MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
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MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
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MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
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MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
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MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
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MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
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MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
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MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
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MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
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MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
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MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
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MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
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MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
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MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
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MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
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MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
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MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
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MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
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MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
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MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
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MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
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MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
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MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
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MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
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MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
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MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
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MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
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MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
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MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
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MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
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MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
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MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
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MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
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MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
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MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
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MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
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MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
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MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
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MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
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MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
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MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
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MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
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buf[0] += a;
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buf[1] += b;
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buf[2] += c;
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buf[3] += d;
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}
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MD5Digest::MD5Digest()
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{
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Reset();
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}
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void MD5Digest::Reset()
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{
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buf[0] = 0x67452301;
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buf[1] = 0xefcdab89;
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buf[2] = 0x98badcfe;
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buf[3] = 0x10325476;
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bits[0] = 0;
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bits[1] = 0;
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std::memset(in, 0, sizeof(in));
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}
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void MD5Digest::Update(const void* pData, u32 cbData)
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{
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u32 t;
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const u8* pByteData = reinterpret_cast<const u8*>(pData);
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/* Update bitcount */
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t = this->bits[0];
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if ((this->bits[0] = t + ((u32)cbData << 3)) < t)
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this->bits[1]++; /* Carry from low to high */
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this->bits[1] += cbData >> 29;
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t = (t >> 3) & 0x3f; /* Bytes already in shsInfo->data */
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/* Handle any leading odd-sized chunks */
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if (t)
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{
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u8* p = (u8*)this->in + t;
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t = 64 - t;
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if (cbData < t)
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{
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std::memcpy(p, pByteData, cbData);
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return;
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}
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std::memcpy(p, pByteData, t);
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MD5Transform(this->buf, (u32*)this->in);
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pByteData += t;
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cbData -= t;
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}
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/* Process data in 64-byte chunks */
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while (cbData >= 64)
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{
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std::memcpy(this->in, pByteData, 64);
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MD5Transform(this->buf, (u32*)this->in);
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pByteData += 64;
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cbData -= 64;
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}
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/* Handle any remaining bytes of data. */
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std::memcpy(this->in, pByteData, cbData);
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}
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void MD5Digest::Final(u8 Digest[16])
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{
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u32 count;
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u8* p;
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/* Compute number of bytes mod 64 */
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count = (this->bits[0] >> 3) & 0x3F;
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/* Set the first char of padding to 0x80. This is safe since there is
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always at least one byte free */
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p = this->in + count;
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*p++ = 0x80;
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/* Bytes of padding needed to make 64 bytes */
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count = 64 - 1 - count;
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/* Pad out to 56 mod 64 */
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if (count < 8)
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{
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/* Two lots of padding: Pad the first block to 64 bytes */
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std::memset(p, 0, count);
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MD5Transform(this->buf, (u32*)this->in);
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/* Now fill the next block with 56 bytes */
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std::memset(this->in, 0, 56);
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}
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else
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{
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/* Pad block to 56 bytes */
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std::memset(p, 0, count - 8);
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}
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/* Append length in bits and transform */
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((u32*)this->in)[14] = this->bits[0];
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((u32*)this->in)[15] = this->bits[1];
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MD5Transform(this->buf, (u32*)this->in);
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std::memcpy(Digest, this->buf, 16);
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}
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@ -0,0 +1,32 @@
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/* PCSX2 - PS2 Emulator for PCs
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* Copyright (C) 2002-2021 PCSX2 Dev Team
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*
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* PCSX2 is free software: you can redistribute it and/or modify it under the terms
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* of the GNU Lesser General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* PCSX2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with PCSX2.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include "Pcsx2Types.h"
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class MD5Digest
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{
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public:
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MD5Digest();
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void Update(const void* pData, u32 cbData);
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void Final(u8 Digest[16]);
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void Reset();
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private:
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u32 buf[4];
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u32 bits[2];
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u8 in[64];
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};
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@ -54,6 +54,7 @@
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<ClCompile Include="GL\StreamBuffer.cpp" />
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<ClCompile Include="FileSystem.cpp" />
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<ClCompile Include="IniInterface.cpp" />
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<ClCompile Include="MD5Digest.cpp" />
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<ClCompile Include="ProgressCallback.cpp" />
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<ClCompile Include="pxStreams.cpp" />
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<ClCompile Include="pxTranslate.cpp" />
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@ -113,6 +114,7 @@
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<ClInclude Include="GL\StreamBuffer.h" />
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<ClInclude Include="FileSystem.h" />
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<ClInclude Include="HashCombine.h" />
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<ClInclude Include="MD5Digest.h" />
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<ClInclude Include="ProgressCallback.h" />
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<ClInclude Include="ScopedGuard.h" />
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<ClInclude Include="StringUtil.h" />
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@ -142,6 +142,9 @@
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<ClCompile Include="ProgressCallback.cpp">
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<Filter>Source Files</Filter>
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</ClCompile>
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<ClCompile Include="MD5Digest.cpp">
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<Filter>Source Files</Filter>
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</ClCompile>
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</ItemGroup>
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<ItemGroup>
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<ClInclude Include="AlignedMalloc.h">
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@ -333,6 +336,9 @@
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<ClInclude Include="HashCombine.h">
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<Filter>Header Files</Filter>
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</ClInclude>
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<ClInclude Include="MD5Digest.h">
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<Filter>Header Files</Filter>
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</ClInclude>
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</ItemGroup>
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<ItemGroup>
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<Filter Include="Source Files">
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