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https://github.com/w23/xash3d-fwgs
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471 lines
14 KiB
C
471 lines
14 KiB
C
/*
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crclib.c - generate crc stuff
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Copyright (C) 2007 Uncle Mike
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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*/
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#include "crclib.h"
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#include "crtlib.h"
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#include <string.h>
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#include <stdlib.h>
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#define NUM_BYTES 256
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#define CRC32_INIT_VALUE 0xFFFFFFFFUL
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#define CRC32_XOR_VALUE 0xFFFFFFFFUL
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static const dword crc32table[NUM_BYTES] =
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{
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0x00000000, 0x77073096, 0xee0e612c, 0x990951ba,
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0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
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0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
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0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
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0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
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0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
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0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec,
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0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
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0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
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0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
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0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940,
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0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
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0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116,
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0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
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0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
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0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
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0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a,
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0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
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0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818,
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0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
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0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
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0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
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0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c,
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0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
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0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
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0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
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0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
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0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
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0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086,
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0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
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0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4,
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0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
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0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
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0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
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0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
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0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
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0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe,
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0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
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0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
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0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
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0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252,
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0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
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0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60,
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0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
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0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
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0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
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0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04,
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0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
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0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a,
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0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
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0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
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0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
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0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e,
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0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
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0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
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0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
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0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
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0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
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0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0,
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0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
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0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6,
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0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
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0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
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0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
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};
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void CRC32_Init( dword *pulCRC )
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{
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*pulCRC = CRC32_INIT_VALUE;
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}
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dword CRC32_Final( dword pulCRC )
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{
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return pulCRC ^ CRC32_XOR_VALUE;
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}
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void CRC32_ProcessByte( dword *pulCRC, byte ch )
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{
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dword ulCrc = *pulCRC;
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ulCrc ^= ch;
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ulCrc = crc32table[(byte)ulCrc] ^ (ulCrc >> 8);
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*pulCRC = ulCrc;
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}
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void CRC32_ProcessBuffer( dword *pulCRC, const void *pBuffer, int nBuffer )
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{
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dword ulCrc = *pulCRC, tmp;
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byte *pb = (byte *)pBuffer;
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uint nFront;
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int nMain;
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JustAfew:
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switch( nBuffer )
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{
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case 7: ulCrc = crc32table[*pb++ ^ (byte)ulCrc] ^ (ulCrc >> 8); // fallthrough
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case 6: ulCrc = crc32table[*pb++ ^ (byte)ulCrc] ^ (ulCrc >> 8); // fallthrough
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case 5: ulCrc = crc32table[*pb++ ^ (byte)ulCrc] ^ (ulCrc >> 8); // fallthrough
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case 4:
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memcpy( &tmp, pb, sizeof(dword));
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ulCrc ^= tmp; // warning, this only works on little-endian.
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ulCrc = crc32table[(byte)ulCrc] ^ (ulCrc >> 8);
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ulCrc = crc32table[(byte)ulCrc] ^ (ulCrc >> 8);
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ulCrc = crc32table[(byte)ulCrc] ^ (ulCrc >> 8);
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ulCrc = crc32table[(byte)ulCrc] ^ (ulCrc >> 8);
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*pulCRC = ulCrc;
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return;
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case 3: ulCrc = crc32table[*pb++ ^ (byte)ulCrc] ^ (ulCrc >> 8); // fallthrough
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case 2: ulCrc = crc32table[*pb++ ^ (byte)ulCrc] ^ (ulCrc >> 8); // fallthrough
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case 1: ulCrc = crc32table[*pb++ ^ (byte)ulCrc] ^ (ulCrc >> 8); // fallthrough
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case 0: *pulCRC = ulCrc;
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return;
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}
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// We may need to do some alignment work up front, and at the end, so that
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// the main loop is aligned and only has to worry about 8 byte at a time.
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// The low-order two bits of pb and nBuffer in total control the
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// upfront work.
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nFront = ((uint)pb) & 3;
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nBuffer -= nFront;
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switch( nFront )
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{
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case 3: ulCrc = crc32table[*pb++ ^ (byte)ulCrc] ^ (ulCrc >> 8); // fallthrough
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case 2: ulCrc = crc32table[*pb++ ^ (byte)ulCrc] ^ (ulCrc >> 8); // fallthrough
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case 1: ulCrc = crc32table[*pb++ ^ (byte)ulCrc] ^ (ulCrc >> 8); // fallthrough
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}
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nMain = nBuffer >> 3;
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while( nMain-- )
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{
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memcpy( &tmp, pb, sizeof(dword));
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ulCrc ^= tmp; // warning, this only works on little-endian.
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ulCrc = crc32table[(byte)ulCrc] ^ (ulCrc >> 8);
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ulCrc = crc32table[(byte)ulCrc] ^ (ulCrc >> 8);
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ulCrc = crc32table[(byte)ulCrc] ^ (ulCrc >> 8);
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ulCrc = crc32table[(byte)ulCrc] ^ (ulCrc >> 8);
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memcpy( &tmp, pb + 4, sizeof(dword));
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ulCrc ^= tmp; // warning, this only works on little-endian.
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ulCrc = crc32table[(byte)ulCrc] ^ (ulCrc >> 8);
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ulCrc = crc32table[(byte)ulCrc] ^ (ulCrc >> 8);
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ulCrc = crc32table[(byte)ulCrc] ^ (ulCrc >> 8);
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ulCrc = crc32table[(byte)ulCrc] ^ (ulCrc >> 8);
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pb += 8;
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}
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nBuffer &= 7;
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goto JustAfew;
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}
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/*
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====================
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CRC32_BlockSequence
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For proxy protecting
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====================
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*/
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byte CRC32_BlockSequence( byte *base, int length, int sequence )
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{
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dword CRC;
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char *ptr;
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char buffer[64];
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if( sequence < 0 ) sequence = abs( sequence );
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ptr = (char *)crc32table + (sequence % 0x3FC);
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if( length > 60 ) length = 60;
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memcpy( buffer, base, length );
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buffer[length+0] = ptr[0];
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buffer[length+1] = ptr[1];
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buffer[length+2] = ptr[2];
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buffer[length+3] = ptr[3];
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length += 4;
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CRC32_Init( &CRC );
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CRC32_ProcessBuffer( &CRC, buffer, length );
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CRC = CRC32_Final( CRC );
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return (byte)CRC;
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}
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void MD5Transform( uint buf[4], const uint in[16] );
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/*
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==================
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MD5Init
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Start MD5 accumulation. Set bit count to 0 and buffer to mysterious initialization constants.
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==================
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*/
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void MD5Init( MD5Context_t *ctx )
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{
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ctx->buf[0] = 0x67452301;
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ctx->buf[1] = 0xefcdab89;
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ctx->buf[2] = 0x98badcfe;
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ctx->buf[3] = 0x10325476;
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ctx->bits[0] = 0;
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ctx->bits[1] = 0;
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}
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/*
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===================
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MD5Update
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Update context to reflect the concatenation of another buffer full of bytes.
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===================
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*/
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void MD5Update( MD5Context_t *ctx, const byte *buf, uint len )
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{
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uint t;
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// update bitcount
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t = ctx->bits[0];
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if(( ctx->bits[0] = t + ((uint) len << 3 )) < t )
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ctx->bits[1]++; // carry from low to high
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ctx->bits[1] += len >> 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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byte *p = (byte *)ctx->in + t;
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t = 64 - t;
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if( len < t )
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{
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memcpy( p, buf, len );
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return;
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}
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memcpy( p, buf, t );
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MD5Transform( ctx->buf, (uint *)ctx->in );
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buf += t;
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len -= t;
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}
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// process data in 64-byte chunks
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while( len >= 64 )
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{
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memcpy( ctx->in, buf, 64 );
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MD5Transform( ctx->buf, (uint *)ctx->in );
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buf += 64;
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len -= 64;
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}
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// handle any remaining bytes of data.
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memcpy( ctx->in, buf, len );
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}
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/*
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===============
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MD5Final
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Final wrapup - pad to 64-byte boundary with the bit pattern
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1 0* (64-bit count of bits processed, MSB-first)
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===============
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*/
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void MD5Final( byte digest[16], MD5Context_t *ctx )
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{
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uint count;
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byte *p;
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// compute number of bytes mod 64
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count = ( ctx->bits[0] >> 3 ) & 0x3F;
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// set the first char of padding to 0x80.
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// this is safe since there is always at least one byte free
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p = ctx->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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memset( p, 0, count );
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MD5Transform( ctx->buf, (uint *)ctx->in );
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// now fill the next block with 56 bytes
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memset( ctx->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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memset( p, 0, count - 8 );
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}
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// append length in bits and transform
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((uint *)ctx->in)[14] = ctx->bits[0];
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((uint *)ctx->in)[15] = ctx->bits[1];
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MD5Transform( ctx->buf, (uint *)ctx->in );
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memcpy( digest, ctx->buf, 16 );
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memset( ctx, 0, sizeof( *ctx )); // in case it's sensitive
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}
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// The four core functions
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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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=================
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MD5Transform
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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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*/
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void MD5Transform( uint buf[4], const uint in[16] )
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{
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register uint 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 );
|
|
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;
|
|
}
|
|
|
|
/*
|
|
=================
|
|
MD5_Print
|
|
|
|
transform hash to hexadecimal printable symbols
|
|
=================
|
|
*/
|
|
char *MD5_Print( byte hash[16] )
|
|
{
|
|
static char szReturn[64];
|
|
char szChunk[10];
|
|
int i;
|
|
|
|
memset( szReturn, 0, 64 );
|
|
|
|
for( i = 0; i < 16; i++ )
|
|
{
|
|
Q_snprintf( szChunk, sizeof( szChunk ), "%02X", hash[i] );
|
|
Q_strncat( szReturn, szChunk, sizeof( szReturn ));
|
|
}
|
|
|
|
return szReturn;
|
|
}
|
|
|
|
/*
|
|
=================
|
|
COM_HashKey
|
|
|
|
returns hash key for string
|
|
=================
|
|
*/
|
|
uint COM_HashKey( const char *string, uint hashSize )
|
|
{
|
|
uint i, hashKey = 0;
|
|
|
|
for( i = 0; string[i]; i++ )
|
|
hashKey = (hashKey + i) * 37 + Q_tolower( string[i] );
|
|
|
|
return (hashKey % hashSize);
|
|
}
|