Mercurial > dropbear
annotate libtomcrypt/src/misc/crc32.c @ 1485:3a916b945185
Use an explicit matrix instead, avoid bad clang combinations etc
author | Matt Johnston <matt@ucc.asn.au> |
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date | Sat, 10 Feb 2018 18:57:44 +0800 |
parents | 6dba84798cd5 |
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rev | line source |
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1471
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1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis |
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2 * |
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3 * LibTomCrypt is a library that provides various cryptographic |
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4 * algorithms in a highly modular and flexible manner. |
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5 * |
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6 * The library is free for all purposes without any express |
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7 * guarantee it works. |
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8 */ |
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9 #include "tomcrypt.h" |
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10 |
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11 /** |
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12 @file crc32.c |
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13 CRC-32 checksum algorithm |
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14 Written and placed in the public domain by Wei Dai |
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15 Adapted for libtomcrypt by Steffen Jaeckel |
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16 */ |
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17 #ifdef LTC_CRC32 |
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18 |
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19 static const ulong32 _CRC32_NEGL = 0xffffffffUL; |
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20 |
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21 #if defined(ENDIAN_LITTLE) |
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22 #define CRC32_INDEX(c) (c & 0xff) |
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23 #define CRC32_SHIFTED(c) (c >> 8) |
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24 #elif defined(ENDIAN_BIG) |
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25 #define CRC32_INDEX(c) (c >> 24) |
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26 #define CRC32_SHIFTED(c) (c << 8) |
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27 #else |
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28 #error The existing CRC32 implementation only works properly when the endianness of the target platform is known. |
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29 #endif |
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30 |
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31 /* Table of CRC-32's of all single byte values (made by makecrc.c) */ |
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32 static const ulong32 crc32_m_tab[] = |
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33 { |
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34 #if defined(ENDIAN_LITTLE) |
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35 0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L, |
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36 0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L, |
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37 0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L, |
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38 0x90bf1d91L, 0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL, |
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39 0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L, 0x136c9856L, |
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40 0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL, 0x14015c4fL, 0x63066cd9L, |
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41 0xfa0f3d63L, 0x8d080df5L, 0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L, |
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42 0xa2677172L, 0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL, |
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43 0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L, 0x32d86ce3L, |
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44 0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L, 0x26d930acL, 0x51de003aL, |
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45 0xc8d75180L, 0xbfd06116L, 0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L, |
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46 0xb8bda50fL, 0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L, |
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47 0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL, 0x76dc4190L, |
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48 0x01db7106L, 0x98d220bcL, 0xefd5102aL, 0x71b18589L, 0x06b6b51fL, |
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49 0x9fbfe4a5L, 0xe8b8d433L, 0x7807c9a2L, 0x0f00f934L, 0x9609a88eL, |
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50 0xe10e9818L, 0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L, |
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51 0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL, 0x6c0695edL, |
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52 0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L, 0x65b0d9c6L, 0x12b7e950L, |
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53 0x8bbeb8eaL, 0xfcb9887cL, 0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L, |
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54 0xfbd44c65L, 0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L, |
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55 0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL, 0x4369e96aL, |
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56 0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L, 0x33031de5L, |
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57 0xaa0a4c5fL, 0xdd0d7cc9L, 0x5005713cL, 0x270241aaL, 0xbe0b1010L, |
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58 0xc90c2086L, 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL, |
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59 0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L, |
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60 0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL, 0xedb88320L, 0x9abfb3b6L, |
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61 0x03b6e20cL, 0x74b1d29aL, 0xead54739L, 0x9dd277afL, 0x04db2615L, |
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62 0x73dc1683L, 0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L, |
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63 0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L, 0xf00f9344L, |
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64 0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL, 0x806567cbL, |
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65 0x196c3671L, 0x6e6b06e7L, 0xfed41b76L, 0x89d32be0L, 0x10da7a5aL, |
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66 0x67dd4accL, 0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L, |
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67 0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L, 0xd1bb67f1L, |
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68 0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL, 0xd80d2bdaL, 0xaf0a1b4cL, |
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69 0x36034af6L, 0x41047a60L, 0xdf60efc3L, 0xa867df55L, 0x316e8eefL, |
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70 0x4669be79L, 0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L, |
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71 0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL, 0xc5ba3bbeL, |
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72 0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L, 0xc2d7ffa7L, 0xb5d0cf31L, |
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73 0x2cd99e8bL, 0x5bdeae1dL, 0x9b64c2b0L, 0xec63f226L, 0x756aa39cL, |
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74 0x026d930aL, 0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L, |
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75 0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L, 0x92d28e9bL, |
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76 0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L, 0x86d3d2d4L, 0xf1d4e242L, |
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77 0x68ddb3f8L, 0x1fda836eL, 0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L, |
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78 0x18b74777L, 0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL, |
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79 0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L, 0xa00ae278L, |
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80 0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L, 0xa7672661L, 0xd06016f7L, |
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81 0x4969474dL, 0x3e6e77dbL, 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L, |
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82 0x37d83bf0L, 0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L, |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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83 0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L, 0xbad03605L, |
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84 0xcdd70693L, 0x54de5729L, 0x23d967bfL, 0xb3667a2eL, 0xc4614ab8L, |
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85 0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL, |
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86 0x2d02ef8dL |
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87 #else |
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88 0x00000000L, 0x96300777L, 0x2c610eeeL, 0xba510999L, 0x19c46d07L, |
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89 0x8ff46a70L, 0x35a563e9L, 0xa395649eL, 0x3288db0eL, 0xa4b8dc79L, |
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90 0x1ee9d5e0L, 0x88d9d297L, 0x2b4cb609L, 0xbd7cb17eL, 0x072db8e7L, |
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|
91 0x911dbf90L, 0x6410b71dL, 0xf220b06aL, 0x4871b9f3L, 0xde41be84L, |
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
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changeset
|
92 0x7dd4da1aL, 0xebe4dd6dL, 0x51b5d4f4L, 0xc785d383L, 0x56986c13L, |
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
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diff
changeset
|
93 0xc0a86b64L, 0x7af962fdL, 0xecc9658aL, 0x4f5c0114L, 0xd96c0663L, |
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
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changeset
|
94 0x633d0ffaL, 0xf50d088dL, 0xc8206e3bL, 0x5e10694cL, 0xe44160d5L, |
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
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diff
changeset
|
95 0x727167a2L, 0xd1e4033cL, 0x47d4044bL, 0xfd850dd2L, 0x6bb50aa5L, |
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
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changeset
|
96 0xfaa8b535L, 0x6c98b242L, 0xd6c9bbdbL, 0x40f9bcacL, 0xe36cd832L, |
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
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|
97 0x755cdf45L, 0xcf0dd6dcL, 0x593dd1abL, 0xac30d926L, 0x3a00de51L, |
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
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|
98 0x8051d7c8L, 0x1661d0bfL, 0xb5f4b421L, 0x23c4b356L, 0x9995bacfL, |
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
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|
99 0x0fa5bdb8L, 0x9eb80228L, 0x0888055fL, 0xb2d90cc6L, 0x24e90bb1L, |
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
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|
100 0x877c6f2fL, 0x114c6858L, 0xab1d61c1L, 0x3d2d66b6L, 0x9041dc76L, |
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
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changeset
|
101 0x0671db01L, 0xbc20d298L, 0x2a10d5efL, 0x8985b171L, 0x1fb5b606L, |
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
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|
102 0xa5e4bf9fL, 0x33d4b8e8L, 0xa2c90778L, 0x34f9000fL, 0x8ea80996L, |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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|
103 0x18980ee1L, 0xbb0d6a7fL, 0x2d3d6d08L, 0x976c6491L, 0x015c63e6L, |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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|
104 0xf4516b6bL, 0x62616c1cL, 0xd8306585L, 0x4e0062f2L, 0xed95066cL, |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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|
105 0x7ba5011bL, 0xc1f40882L, 0x57c40ff5L, 0xc6d9b065L, 0x50e9b712L, |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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|
106 0xeab8be8bL, 0x7c88b9fcL, 0xdf1ddd62L, 0x492dda15L, 0xf37cd38cL, |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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|
107 0x654cd4fbL, 0x5861b24dL, 0xce51b53aL, 0x7400bca3L, 0xe230bbd4L, |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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|
108 0x41a5df4aL, 0xd795d83dL, 0x6dc4d1a4L, 0xfbf4d6d3L, 0x6ae96943L, |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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|
109 0xfcd96e34L, 0x468867adL, 0xd0b860daL, 0x732d0444L, 0xe51d0333L, |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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|
110 0x5f4c0aaaL, 0xc97c0dddL, 0x3c710550L, 0xaa410227L, 0x10100bbeL, |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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111 0x86200cc9L, 0x25b56857L, 0xb3856f20L, 0x09d466b9L, 0x9fe461ceL, |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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|
112 0x0ef9de5eL, 0x98c9d929L, 0x2298d0b0L, 0xb4a8d7c7L, 0x173db359L, |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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113 0x810db42eL, 0x3b5cbdb7L, 0xad6cbac0L, 0x2083b8edL, 0xb6b3bf9aL, |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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|
114 0x0ce2b603L, 0x9ad2b174L, 0x3947d5eaL, 0xaf77d29dL, 0x1526db04L, |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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115 0x8316dc73L, 0x120b63e3L, 0x843b6494L, 0x3e6a6d0dL, 0xa85a6a7aL, |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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116 0x0bcf0ee4L, 0x9dff0993L, 0x27ae000aL, 0xb19e077dL, 0x44930ff0L, |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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|
117 0xd2a30887L, 0x68f2011eL, 0xfec20669L, 0x5d5762f7L, 0xcb676580L, |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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118 0x71366c19L, 0xe7066b6eL, 0x761bd4feL, 0xe02bd389L, 0x5a7ada10L, |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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|
119 0xcc4add67L, 0x6fdfb9f9L, 0xf9efbe8eL, 0x43beb717L, 0xd58eb060L, |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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|
120 0xe8a3d6d6L, 0x7e93d1a1L, 0xc4c2d838L, 0x52f2df4fL, 0xf167bbd1L, |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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|
121 0x6757bca6L, 0xdd06b53fL, 0x4b36b248L, 0xda2b0dd8L, 0x4c1b0aafL, |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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122 0xf64a0336L, 0x607a0441L, 0xc3ef60dfL, 0x55df67a8L, 0xef8e6e31L, |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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123 0x79be6946L, 0x8cb361cbL, 0x1a8366bcL, 0xa0d26f25L, 0x36e26852L, |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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124 0x95770cccL, 0x03470bbbL, 0xb9160222L, 0x2f260555L, 0xbe3bbac5L, |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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125 0x280bbdb2L, 0x925ab42bL, 0x046ab35cL, 0xa7ffd7c2L, 0x31cfd0b5L, |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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126 0x8b9ed92cL, 0x1daede5bL, 0xb0c2649bL, 0x26f263ecL, 0x9ca36a75L, |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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127 0x0a936d02L, 0xa906099cL, 0x3f360eebL, 0x85670772L, 0x13570005L, |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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128 0x824abf95L, 0x147ab8e2L, 0xae2bb17bL, 0x381bb60cL, 0x9b8ed292L, |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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129 0x0dbed5e5L, 0xb7efdc7cL, 0x21dfdb0bL, 0xd4d2d386L, 0x42e2d4f1L, |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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130 0xf8b3dd68L, 0x6e83da1fL, 0xcd16be81L, 0x5b26b9f6L, 0xe177b06fL, |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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131 0x7747b718L, 0xe65a0888L, 0x706a0fffL, 0xca3b0666L, 0x5c0b0111L, |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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132 0xff9e658fL, 0x69ae62f8L, 0xd3ff6b61L, 0x45cf6c16L, 0x78e20aa0L, |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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133 0xeed20dd7L, 0x5483044eL, 0xc2b30339L, 0x612667a7L, 0xf71660d0L, |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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134 0x4d476949L, 0xdb776e3eL, 0x4a6ad1aeL, 0xdc5ad6d9L, 0x660bdf40L, |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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135 0xf03bd837L, 0x53aebca9L, 0xc59ebbdeL, 0x7fcfb247L, 0xe9ffb530L, |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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136 0x1cf2bdbdL, 0x8ac2bacaL, 0x3093b353L, 0xa6a3b424L, 0x0536d0baL, |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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137 0x9306d7cdL, 0x2957de54L, 0xbf67d923L, 0x2e7a66b3L, 0xb84a61c4L, |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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138 0x021b685dL, 0x942b6f2aL, 0x37be0bb4L, 0xa18e0cc3L, 0x1bdf055aL, |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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139 0x8def022dL |
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140 #endif |
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141 }; |
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142 |
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143 void crc32_init(crc32_state *ctx) |
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144 { |
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145 LTC_ARGCHKVD(ctx != NULL); |
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146 ctx->crc = _CRC32_NEGL; |
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147 } |
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148 |
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149 void crc32_update(crc32_state *ctx, const unsigned char *input, unsigned long length) |
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150 { |
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151 ulong32 crc; |
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152 LTC_ARGCHKVD(ctx != NULL); |
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153 LTC_ARGCHKVD(input != NULL); |
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154 crc = ctx->crc; |
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155 |
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156 while (length--) |
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157 crc = crc32_m_tab[CRC32_INDEX(crc) ^ *input++] ^ CRC32_SHIFTED(crc); |
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158 |
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159 ctx->crc = crc; |
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160 } |
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161 |
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162 void crc32_finish(crc32_state *ctx, void *hash, unsigned long size) |
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163 { |
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164 unsigned long i; |
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165 unsigned char* h; |
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166 ulong32 crc; |
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167 LTC_ARGCHKVD(ctx != NULL); |
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168 LTC_ARGCHKVD(hash != NULL); |
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169 |
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170 h = hash; |
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171 crc = ctx->crc; |
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172 crc ^= _CRC32_NEGL; |
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173 |
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174 if (size > 4) size = 4; |
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175 for (i = 0; i < size; i++) { |
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176 h[i] = ((unsigned char*)&(crc))[size-i-1]; |
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177 } |
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178 } |
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179 |
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180 int crc32_test(void) |
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181 { |
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182 #ifndef LTC_TEST |
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183 return CRYPT_NOP; |
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184 #else |
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185 const void* in = "libtomcrypt"; |
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186 const unsigned char crc32[] = { 0xb3, 0x73, 0x76, 0xef }; |
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187 unsigned char out[4]; |
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188 crc32_state ctx; |
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189 crc32_init(&ctx); |
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190 crc32_update(&ctx, in, strlen(in)); |
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191 crc32_finish(&ctx, out, 4); |
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192 if (compare_testvector(crc32, 4, out, 4, "CRC32", 0)) { |
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193 return CRYPT_FAIL_TESTVECTOR; |
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194 } |
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195 return CRYPT_OK; |
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196 #endif |
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197 } |
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198 #endif |
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199 |
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200 /* ref: $Format:%D$ */ |
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201 /* git commit: $Format:%H$ */ |
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202 /* commit time: $Format:%ai$ */ |