From cdb0068dcc4492a066a7383ef06844450bec7b80 Mon Sep 17 00:00:00 2001 From: Connor McLaughlin Date: Thu, 21 Oct 2021 16:57:10 +1000 Subject: [PATCH] Common: Add MD5Digest --- common/CMakeLists.txt | 2 + common/MD5Digest.cpp | 222 ++++++++++++++++++++++++++++++++++ common/MD5Digest.h | 32 +++++ common/common.vcxproj | 2 + common/common.vcxproj.filters | 6 + 5 files changed, 264 insertions(+) create mode 100644 common/MD5Digest.cpp create mode 100644 common/MD5Digest.h diff --git a/common/CMakeLists.txt b/common/CMakeLists.txt index 22f2ff07c7..9a855288ec 100644 --- a/common/CMakeLists.txt +++ b/common/CMakeLists.txt @@ -24,6 +24,7 @@ target_sources(common PRIVATE IniInterface.cpp Mutex.cpp Misc.cpp + MD5Digest.cpp PathUtils.cpp PrecompiledHeader.cpp Perf.cpp @@ -79,6 +80,7 @@ target_sources(common PRIVATE HashCombine.h MemcpyFast.h MemsetFast.inl + MD5Digest.h Path.h PageFaultSource.h PrecompiledHeader.h diff --git a/common/MD5Digest.cpp b/common/MD5Digest.cpp new file mode 100644 index 0000000000..98cb1e1ce2 --- /dev/null +++ b/common/MD5Digest.cpp @@ -0,0 +1,222 @@ +/* PCSX2 - PS2 Emulator for PCs + * Copyright (C) 2002-2021 PCSX2 Dev Team + * + * PCSX2 is free software: you can redistribute it and/or modify it under the terms + * of the GNU Lesser General Public License as published by the Free Software Found- + * ation, either version 3 of the License, or (at your option) any later version. + * + * PCSX2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; + * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR + * PURPOSE. See the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along with PCSX2. + * If not, see . + */ + +#include "MD5Digest.h" +#include + +// mostly based on this implementation (public domain): http://www.fourmilab.ch/md5/ + +/* The four core functions - F1 is optimized somewhat */ + +/* #define F1(x, y, z) (x & y | ~x & z) */ +#define F1(x, y, z) (z ^ (x & (y ^ z))) +#define F2(x, y, z) F1(z, x, y) +#define F3(x, y, z) (x ^ y ^ z) +#define F4(x, y, z) (y ^ (x | ~z)) + +/* This is the central step in the MD5 algorithm. */ +#define MD5STEP(f, w, x, y, z, data, s) (w += f(x, y, z) + data, w = w << s | w >> (32 - s), w += x) + +/* + * The core of the MD5 algorithm, this alters an existing MD5 hash to + * reflect the addition of 16 longwords of new data. MD5Update blocks + * the data and converts bytes into longwords for this routine. + */ +static void MD5Transform(u32 buf[4], u32 in[16]) +{ + u32 a, b, c, d; + + a = buf[0]; + b = buf[1]; + c = buf[2]; + d = buf[3]; + + MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7); + MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12); + MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17); + MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22); + MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7); + MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12); + MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17); + MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22); + MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7); + MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12); + MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17); + MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22); + MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7); + MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12); + MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17); + MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22); + + MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5); + MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9); + MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14); + MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20); + MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5); + MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9); + MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14); + MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20); + MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5); + MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9); + MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14); + MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20); + MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5); + MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9); + MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14); + MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20); + + MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4); + MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11); + MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16); + MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23); + MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4); + MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11); + MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16); + MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23); + MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4); + MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11); + MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16); + MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23); + MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4); + MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11); + MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16); + MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23); + + MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6); + MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10); + MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15); + MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21); + MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6); + MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10); + MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15); + MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21); + MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6); + MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10); + MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15); + MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21); + MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6); + MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10); + MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15); + MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21); + + buf[0] += a; + buf[1] += b; + buf[2] += c; + buf[3] += d; +} + +MD5Digest::MD5Digest() +{ + Reset(); +} + +void MD5Digest::Reset() +{ + buf[0] = 0x67452301; + buf[1] = 0xefcdab89; + buf[2] = 0x98badcfe; + buf[3] = 0x10325476; + + bits[0] = 0; + bits[1] = 0; + + std::memset(in, 0, sizeof(in)); +} + +void MD5Digest::Update(const void* pData, u32 cbData) +{ + u32 t; + const u8* pByteData = reinterpret_cast(pData); + + /* Update bitcount */ + + t = this->bits[0]; + if ((this->bits[0] = t + ((u32)cbData << 3)) < t) + this->bits[1]++; /* Carry from low to high */ + this->bits[1] += cbData >> 29; + + t = (t >> 3) & 0x3f; /* Bytes already in shsInfo->data */ + + /* Handle any leading odd-sized chunks */ + + if (t) + { + u8* p = (u8*)this->in + t; + + t = 64 - t; + if (cbData < t) + { + std::memcpy(p, pByteData, cbData); + return; + } + std::memcpy(p, pByteData, t); + MD5Transform(this->buf, (u32*)this->in); + pByteData += t; + cbData -= t; + } + /* Process data in 64-byte chunks */ + + while (cbData >= 64) + { + std::memcpy(this->in, pByteData, 64); + MD5Transform(this->buf, (u32*)this->in); + pByteData += 64; + cbData -= 64; + } + + /* Handle any remaining bytes of data. */ + + std::memcpy(this->in, pByteData, cbData); +} + +void MD5Digest::Final(u8 Digest[16]) +{ + u32 count; + u8* p; + + /* Compute number of bytes mod 64 */ + count = (this->bits[0] >> 3) & 0x3F; + + /* Set the first char of padding to 0x80. This is safe since there is + always at least one byte free */ + p = this->in + count; + *p++ = 0x80; + + /* Bytes of padding needed to make 64 bytes */ + count = 64 - 1 - count; + + /* Pad out to 56 mod 64 */ + if (count < 8) + { + /* Two lots of padding: Pad the first block to 64 bytes */ + std::memset(p, 0, count); + MD5Transform(this->buf, (u32*)this->in); + + /* Now fill the next block with 56 bytes */ + std::memset(this->in, 0, 56); + } + else + { + /* Pad block to 56 bytes */ + std::memset(p, 0, count - 8); + } + + /* Append length in bits and transform */ + ((u32*)this->in)[14] = this->bits[0]; + ((u32*)this->in)[15] = this->bits[1]; + + MD5Transform(this->buf, (u32*)this->in); + std::memcpy(Digest, this->buf, 16); +} diff --git a/common/MD5Digest.h b/common/MD5Digest.h new file mode 100644 index 0000000000..40016f4465 --- /dev/null +++ b/common/MD5Digest.h @@ -0,0 +1,32 @@ +/* PCSX2 - PS2 Emulator for PCs + * Copyright (C) 2002-2021 PCSX2 Dev Team + * + * PCSX2 is free software: you can redistribute it and/or modify it under the terms + * of the GNU Lesser General Public License as published by the Free Software Found- + * ation, either version 3 of the License, or (at your option) any later version. + * + * PCSX2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; + * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR + * PURPOSE. See the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along with PCSX2. + * If not, see . + */ + +#pragma once +#include "Pcsx2Types.h" + +class MD5Digest +{ +public: + MD5Digest(); + + void Update(const void* pData, u32 cbData); + void Final(u8 Digest[16]); + void Reset(); + +private: + u32 buf[4]; + u32 bits[2]; + u8 in[64]; +}; diff --git a/common/common.vcxproj b/common/common.vcxproj index 3b5422402b..5b1d8a9870 100644 --- a/common/common.vcxproj +++ b/common/common.vcxproj @@ -54,6 +54,7 @@ + @@ -113,6 +114,7 @@ + diff --git a/common/common.vcxproj.filters b/common/common.vcxproj.filters index 3c7014fd22..05369d0ef6 100644 --- a/common/common.vcxproj.filters +++ b/common/common.vcxproj.filters @@ -142,6 +142,9 @@ Source Files + + Source Files + @@ -333,6 +336,9 @@ Header Files + + Header Files +