-/*

- Legal Notice: Some portions of the source code contained in this file were

- derived from the source code of TrueCrypt 7.1a, which is

- Copyright (c) 2003-2012 TrueCrypt Developers Association and which is

- governed by the TrueCrypt License 3.0, also from the source code of

- Encryption for the Masses 2.02a, which is Copyright (c) 1998-2000 Paul Le Roux

- and which is governed by the 'License Agreement for Encryption for the Masses'

- Modifications and additions to the original source code (contained in this file)

- and all other portions of this file are Copyright (c) 2013-2016 IDRIX

- and are governed by the Apache License 2.0 the full text of which is

- contained in the file License.txt included in VeraCrypt binary and source

- code distribution packages. */

-

-#include "Tcdefs.h"

-#include "Crc.h"

-#include "Common/Endian.h"

-

-#ifndef TC_MINIMIZE_CODE_SIZE

-

-/* CRC polynomial 0x04c11db7 */

-unsigned __int32 crc_32_tab[]=

-{

- 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,

- 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,

- 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,

- 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,

- 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,

- 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,

- 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,

- 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,

- 0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,

- 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,

- 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,

- 0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,

- 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,

- 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,

- 0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,

- 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,

- 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,

- 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,

- 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,

- 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,

- 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,

- 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,

- 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,

- 0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,

- 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,

- 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,

- 0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,

- 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,

- 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,

- 0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,

- 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,

- 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d

-};

-

-unsigned __int32 GetCrc32 (unsigned char *data, int length)

-{

- unsigned __int32 CRC = 0xffffffff;

-

- while (length--)

- {

- CRC = (CRC >> 8) ^ crc_32_tab[ (CRC ^ *data++) & 0xFF ];

- }

-

- return CRC ^ 0xffffffff;

-}

-

-unsigned __int32 crc32int (unsigned __int32 *data)

-{

- unsigned char *d = (unsigned char *) data;

- unsigned __int32 CRC = 0xffffffff;

-

- CRC = (CRC >> 8) ^ crc_32_tab[ (CRC ^ *d++) & 0xFF ];

- CRC = (CRC >> 8) ^ crc_32_tab[ (CRC ^ *d++) & 0xFF ];

- CRC = (CRC >> 8) ^ crc_32_tab[ (CRC ^ *d++) & 0xFF ];

- return (CRC >> 8) ^ crc_32_tab[ (CRC ^ *d) & 0xFF ] ^ 0xffffffff;

-}

-

-#if BYTE_ORDER == LITTLE_ENDIAN

-# define CRC_SELFTEST 0x6fcf9e13

-#else

-# define CRC_SELFTEST 0xca87914d

-#endif

-

-BOOL crc32_selftests (void)

-{

- int i;

- unsigned __int32 crc = 0xffffffff;

- BOOL bSuccess = FALSE;

-

- for (i = 0; i < (int)sizeof(crc_32_tab); i++)

- crc = UPDC32 (((unsigned char *) crc_32_tab)[i], crc);

-

- bSuccess = CRC_SELFTEST == (crc ^ 0xffffffff);

-

- bSuccess &= GetCrc32 ((unsigned char *)crc_32_tab, sizeof crc_32_tab) == CRC_SELFTEST;

-

- return bSuccess;

-}

-

-#else // TC_MINIMIZE_CODE_SIZE

-

-unsigned __int32 GetCrc32 (unsigned char *data, int length)

-{

- unsigned __int32 r = 0xFFFFFFFFUL;

- int i, b;

-

- for (i = 0; i < length; ++i)

- {

- r ^= data[i];

- for (b = 0; b < 8; ++b)

- {

- if ((unsigned __int8) r & 1)

- r = (r >> 1) ^ 0xEDB88320UL;

- else

- r >>= 1;

- }

- }

-

- return r ^ 0xFFFFFFFFUL;

-}

-

-BOOL crc32_selftests ()

-{

- unsigned __int8 testData[32];

- unsigned __int8 i;

-

- for (i = 0; i < sizeof (testData); ++i)

- testData[i] = i;

-

- return GetCrc32 (testData, sizeof (testData)) == 0x91267E8AUL;

-}

-

-#endif // TC_MINIMIZE_CODE_SIZE