Mercurial > dropbear
annotate libtomcrypt/src/misc/crc32.c @ 1861:2b3a8026a6ce
Add re-exec for server
This allows ASLR to re-randomize the address
space for every connection, preventing some
vulnerabilities from being exploitable by
repeated probing.
Overhead (memory and time) is yet to be confirmed.
At present this is only enabled on Linux. Other BSD platforms
with fexecve() would probably also work though have not been tested.
author | Matt Johnston <matt@ucc.asn.au> |
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date | Sun, 30 Jan 2022 10:14:56 +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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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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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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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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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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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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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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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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84 0xcdd70693L, 0x54de5729L, 0x23d967bfL, 0xb3667a2eL, 0xc4614ab8L, |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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85 0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL, |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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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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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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89 0x8ff46a70L, 0x35a563e9L, 0xa395649eL, 0x3288db0eL, 0xa4b8dc79L, |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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diff
changeset
|
90 0x1ee9d5e0L, 0x88d9d297L, 0x2b4cb609L, 0xbd7cb17eL, 0x072db8e7L, |
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
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diff
changeset
|
91 0x911dbf90L, 0x6410b71dL, 0xf220b06aL, 0x4871b9f3L, 0xde41be84L, |
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
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diff
changeset
|
92 0x7dd4da1aL, 0xebe4dd6dL, 0x51b5d4f4L, 0xc785d383L, 0x56986c13L, |
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
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diff
changeset
|
93 0xc0a86b64L, 0x7af962fdL, 0xecc9658aL, 0x4f5c0114L, 0xd96c0663L, |
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
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diff
changeset
|
94 0x633d0ffaL, 0xf50d088dL, 0xc8206e3bL, 0x5e10694cL, 0xe44160d5L, |
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
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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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diff
changeset
|
96 0xfaa8b535L, 0x6c98b242L, 0xd6c9bbdbL, 0x40f9bcacL, 0xe36cd832L, |
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
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changeset
|
97 0x755cdf45L, 0xcf0dd6dcL, 0x593dd1abL, 0xac30d926L, 0x3a00de51L, |
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
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diff
changeset
|
98 0x8051d7c8L, 0x1661d0bfL, 0xb5f4b421L, 0x23c4b356L, 0x9995bacfL, |
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
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diff
changeset
|
99 0x0fa5bdb8L, 0x9eb80228L, 0x0888055fL, 0xb2d90cc6L, 0x24e90bb1L, |
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
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diff
changeset
|
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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diff
changeset
|
102 0xa5e4bf9fL, 0x33d4b8e8L, 0xa2c90778L, 0x34f9000fL, 0x8ea80996L, |
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
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|
103 0x18980ee1L, 0xbb0d6a7fL, 0x2d3d6d08L, 0x976c6491L, 0x015c63e6L, |
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
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|
104 0xf4516b6bL, 0x62616c1cL, 0xd8306585L, 0x4e0062f2L, 0xed95066cL, |
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
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changeset
|
105 0x7ba5011bL, 0xc1f40882L, 0x57c40ff5L, 0xc6d9b065L, 0x50e9b712L, |
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
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changeset
|
106 0xeab8be8bL, 0x7c88b9fcL, 0xdf1ddd62L, 0x492dda15L, 0xf37cd38cL, |
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
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|
107 0x654cd4fbL, 0x5861b24dL, 0xce51b53aL, 0x7400bca3L, 0xe230bbd4L, |
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
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|
108 0x41a5df4aL, 0xd795d83dL, 0x6dc4d1a4L, 0xfbf4d6d3L, 0x6ae96943L, |
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
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changeset
|
109 0xfcd96e34L, 0x468867adL, 0xd0b860daL, 0x732d0444L, 0xe51d0333L, |
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
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changeset
|
110 0x5f4c0aaaL, 0xc97c0dddL, 0x3c710550L, 0xaa410227L, 0x10100bbeL, |
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
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|
111 0x86200cc9L, 0x25b56857L, 0xb3856f20L, 0x09d466b9L, 0x9fe461ceL, |
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
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|
112 0x0ef9de5eL, 0x98c9d929L, 0x2298d0b0L, 0xb4a8d7c7L, 0x173db359L, |
6dba84798cd5
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, |
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
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|
115 0x8316dc73L, 0x120b63e3L, 0x843b6494L, 0x3e6a6d0dL, 0xa85a6a7aL, |
6dba84798cd5
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, |
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
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|
120 0xe8a3d6d6L, 0x7e93d1a1L, 0xc4c2d838L, 0x52f2df4fL, 0xf167bbd1L, |
6dba84798cd5
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, |
6dba84798cd5
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: $Format:%ai$ */ |