Crypto++  8.6
Free C++ class library of cryptographic schemes
crc.cpp
1 // crc.cpp - originally written and placed in the public domain by Wei Dai
2 
3 #include "pch.h"
4 #include "config.h"
5 #include "crc.h"
6 #include "misc.h"
7 #include "cpu.h"
8 
9 NAMESPACE_BEGIN(CryptoPP)
10 
11 // crc_simd.cpp
12 #if (CRYPTOPP_ARM_CRC32_AVAILABLE)
13 extern void CRC32_Update_ARMV8(const byte *s, size_t n, word32& c);
14 extern void CRC32C_Update_ARMV8(const byte *s, size_t n, word32& c);
15 #endif
16 
17 // crc_simd.cpp
18 #if (CRYPTOPP_SSE42_AVAILABLE)
19 extern void CRC32C_Update_SSE42(const byte *s, size_t n, word32& c);
20 #endif
21 
22 /* Table of CRC-32's of all single byte values (made by makecrc.c) */
23 const word32 CRC32::m_tab[] = {
24 #if (CRYPTOPP_LITTLE_ENDIAN)
25  0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L,
26  0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L,
27  0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L,
28  0x90bf1d91L, 0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL,
29  0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L, 0x136c9856L,
30  0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL, 0x14015c4fL, 0x63066cd9L,
31  0xfa0f3d63L, 0x8d080df5L, 0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L,
32  0xa2677172L, 0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL,
33  0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L, 0x32d86ce3L,
34  0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L, 0x26d930acL, 0x51de003aL,
35  0xc8d75180L, 0xbfd06116L, 0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L,
36  0xb8bda50fL, 0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L,
37  0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL, 0x76dc4190L,
38  0x01db7106L, 0x98d220bcL, 0xefd5102aL, 0x71b18589L, 0x06b6b51fL,
39  0x9fbfe4a5L, 0xe8b8d433L, 0x7807c9a2L, 0x0f00f934L, 0x9609a88eL,
40  0xe10e9818L, 0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L,
41  0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL, 0x6c0695edL,
42  0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L, 0x65b0d9c6L, 0x12b7e950L,
43  0x8bbeb8eaL, 0xfcb9887cL, 0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L,
44  0xfbd44c65L, 0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L,
45  0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL, 0x4369e96aL,
46  0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L, 0x33031de5L,
47  0xaa0a4c5fL, 0xdd0d7cc9L, 0x5005713cL, 0x270241aaL, 0xbe0b1010L,
48  0xc90c2086L, 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL,
49  0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L,
50  0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL, 0xedb88320L, 0x9abfb3b6L,
51  0x03b6e20cL, 0x74b1d29aL, 0xead54739L, 0x9dd277afL, 0x04db2615L,
52  0x73dc1683L, 0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L,
53  0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L, 0xf00f9344L,
54  0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL, 0x806567cbL,
55  0x196c3671L, 0x6e6b06e7L, 0xfed41b76L, 0x89d32be0L, 0x10da7a5aL,
56  0x67dd4accL, 0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L,
57  0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L, 0xd1bb67f1L,
58  0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL, 0xd80d2bdaL, 0xaf0a1b4cL,
59  0x36034af6L, 0x41047a60L, 0xdf60efc3L, 0xa867df55L, 0x316e8eefL,
60  0x4669be79L, 0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L,
61  0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL, 0xc5ba3bbeL,
62  0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L, 0xc2d7ffa7L, 0xb5d0cf31L,
63  0x2cd99e8bL, 0x5bdeae1dL, 0x9b64c2b0L, 0xec63f226L, 0x756aa39cL,
64  0x026d930aL, 0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L,
65  0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L, 0x92d28e9bL,
66  0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L, 0x86d3d2d4L, 0xf1d4e242L,
67  0x68ddb3f8L, 0x1fda836eL, 0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L,
68  0x18b74777L, 0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL,
69  0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L, 0xa00ae278L,
70  0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L, 0xa7672661L, 0xd06016f7L,
71  0x4969474dL, 0x3e6e77dbL, 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L,
72  0x37d83bf0L, 0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L,
73  0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L, 0xbad03605L,
74  0xcdd70693L, 0x54de5729L, 0x23d967bfL, 0xb3667a2eL, 0xc4614ab8L,
75  0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL,
76  0x2d02ef8dL
77 #else
78  0x00000000L, 0x96300777L, 0x2c610eeeL, 0xba510999L, 0x19c46d07L,
79  0x8ff46a70L, 0x35a563e9L, 0xa395649eL, 0x3288db0eL, 0xa4b8dc79L,
80  0x1ee9d5e0L, 0x88d9d297L, 0x2b4cb609L, 0xbd7cb17eL, 0x072db8e7L,
81  0x911dbf90L, 0x6410b71dL, 0xf220b06aL, 0x4871b9f3L, 0xde41be84L,
82  0x7dd4da1aL, 0xebe4dd6dL, 0x51b5d4f4L, 0xc785d383L, 0x56986c13L,
83  0xc0a86b64L, 0x7af962fdL, 0xecc9658aL, 0x4f5c0114L, 0xd96c0663L,
84  0x633d0ffaL, 0xf50d088dL, 0xc8206e3bL, 0x5e10694cL, 0xe44160d5L,
85  0x727167a2L, 0xd1e4033cL, 0x47d4044bL, 0xfd850dd2L, 0x6bb50aa5L,
86  0xfaa8b535L, 0x6c98b242L, 0xd6c9bbdbL, 0x40f9bcacL, 0xe36cd832L,
87  0x755cdf45L, 0xcf0dd6dcL, 0x593dd1abL, 0xac30d926L, 0x3a00de51L,
88  0x8051d7c8L, 0x1661d0bfL, 0xb5f4b421L, 0x23c4b356L, 0x9995bacfL,
89  0x0fa5bdb8L, 0x9eb80228L, 0x0888055fL, 0xb2d90cc6L, 0x24e90bb1L,
90  0x877c6f2fL, 0x114c6858L, 0xab1d61c1L, 0x3d2d66b6L, 0x9041dc76L,
91  0x0671db01L, 0xbc20d298L, 0x2a10d5efL, 0x8985b171L, 0x1fb5b606L,
92  0xa5e4bf9fL, 0x33d4b8e8L, 0xa2c90778L, 0x34f9000fL, 0x8ea80996L,
93  0x18980ee1L, 0xbb0d6a7fL, 0x2d3d6d08L, 0x976c6491L, 0x015c63e6L,
94  0xf4516b6bL, 0x62616c1cL, 0xd8306585L, 0x4e0062f2L, 0xed95066cL,
95  0x7ba5011bL, 0xc1f40882L, 0x57c40ff5L, 0xc6d9b065L, 0x50e9b712L,
96  0xeab8be8bL, 0x7c88b9fcL, 0xdf1ddd62L, 0x492dda15L, 0xf37cd38cL,
97  0x654cd4fbL, 0x5861b24dL, 0xce51b53aL, 0x7400bca3L, 0xe230bbd4L,
98  0x41a5df4aL, 0xd795d83dL, 0x6dc4d1a4L, 0xfbf4d6d3L, 0x6ae96943L,
99  0xfcd96e34L, 0x468867adL, 0xd0b860daL, 0x732d0444L, 0xe51d0333L,
100  0x5f4c0aaaL, 0xc97c0dddL, 0x3c710550L, 0xaa410227L, 0x10100bbeL,
101  0x86200cc9L, 0x25b56857L, 0xb3856f20L, 0x09d466b9L, 0x9fe461ceL,
102  0x0ef9de5eL, 0x98c9d929L, 0x2298d0b0L, 0xb4a8d7c7L, 0x173db359L,
103  0x810db42eL, 0x3b5cbdb7L, 0xad6cbac0L, 0x2083b8edL, 0xb6b3bf9aL,
104  0x0ce2b603L, 0x9ad2b174L, 0x3947d5eaL, 0xaf77d29dL, 0x1526db04L,
105  0x8316dc73L, 0x120b63e3L, 0x843b6494L, 0x3e6a6d0dL, 0xa85a6a7aL,
106  0x0bcf0ee4L, 0x9dff0993L, 0x27ae000aL, 0xb19e077dL, 0x44930ff0L,
107  0xd2a30887L, 0x68f2011eL, 0xfec20669L, 0x5d5762f7L, 0xcb676580L,
108  0x71366c19L, 0xe7066b6eL, 0x761bd4feL, 0xe02bd389L, 0x5a7ada10L,
109  0xcc4add67L, 0x6fdfb9f9L, 0xf9efbe8eL, 0x43beb717L, 0xd58eb060L,
110  0xe8a3d6d6L, 0x7e93d1a1L, 0xc4c2d838L, 0x52f2df4fL, 0xf167bbd1L,
111  0x6757bca6L, 0xdd06b53fL, 0x4b36b248L, 0xda2b0dd8L, 0x4c1b0aafL,
112  0xf64a0336L, 0x607a0441L, 0xc3ef60dfL, 0x55df67a8L, 0xef8e6e31L,
113  0x79be6946L, 0x8cb361cbL, 0x1a8366bcL, 0xa0d26f25L, 0x36e26852L,
114  0x95770cccL, 0x03470bbbL, 0xb9160222L, 0x2f260555L, 0xbe3bbac5L,
115  0x280bbdb2L, 0x925ab42bL, 0x046ab35cL, 0xa7ffd7c2L, 0x31cfd0b5L,
116  0x8b9ed92cL, 0x1daede5bL, 0xb0c2649bL, 0x26f263ecL, 0x9ca36a75L,
117  0x0a936d02L, 0xa906099cL, 0x3f360eebL, 0x85670772L, 0x13570005L,
118  0x824abf95L, 0x147ab8e2L, 0xae2bb17bL, 0x381bb60cL, 0x9b8ed292L,
119  0x0dbed5e5L, 0xb7efdc7cL, 0x21dfdb0bL, 0xd4d2d386L, 0x42e2d4f1L,
120  0xf8b3dd68L, 0x6e83da1fL, 0xcd16be81L, 0x5b26b9f6L, 0xe177b06fL,
121  0x7747b718L, 0xe65a0888L, 0x706a0fffL, 0xca3b0666L, 0x5c0b0111L,
122  0xff9e658fL, 0x69ae62f8L, 0xd3ff6b61L, 0x45cf6c16L, 0x78e20aa0L,
123  0xeed20dd7L, 0x5483044eL, 0xc2b30339L, 0x612667a7L, 0xf71660d0L,
124  0x4d476949L, 0xdb776e3eL, 0x4a6ad1aeL, 0xdc5ad6d9L, 0x660bdf40L,
125  0xf03bd837L, 0x53aebca9L, 0xc59ebbdeL, 0x7fcfb247L, 0xe9ffb530L,
126  0x1cf2bdbdL, 0x8ac2bacaL, 0x3093b353L, 0xa6a3b424L, 0x0536d0baL,
127  0x9306d7cdL, 0x2957de54L, 0xbf67d923L, 0x2e7a66b3L, 0xb84a61c4L,
128  0x021b685dL, 0x942b6f2aL, 0x37be0bb4L, 0xa18e0cc3L, 0x1bdf055aL,
129  0x8def022dL
130 #endif
131 };
132 
133 std::string CRC32::AlgorithmProvider() const
134 {
135 #if (CRYPTOPP_ARM_CRC32_AVAILABLE)
136  if (HasCRC32())
137  return "ARMv8";
138 #endif
139  return "C++";
140 }
141 
142 CRC32::CRC32()
143 {
144  Reset();
145 }
146 
147 void CRC32::Update(const byte *s, size_t n)
148 {
149 #if (CRYPTOPP_ARM_CRC32_AVAILABLE)
150  if (HasCRC32())
151  {
152  CRC32_Update_ARMV8(s, n, m_crc);
153  return;
154  }
155 #endif
156 
157  word32 crc = m_crc;
158 
159  for(; !IsAligned<word32>(s) && n > 0; n--)
160  crc = m_tab[CRC32_INDEX(crc) ^ *s++] ^ CRC32_SHIFTED(crc);
161 
162  while (n >= 4)
163  {
164  crc ^= *(const word32 *)(void*)s;
165  crc = m_tab[CRC32_INDEX(crc)] ^ CRC32_SHIFTED(crc);
166  crc = m_tab[CRC32_INDEX(crc)] ^ CRC32_SHIFTED(crc);
167  crc = m_tab[CRC32_INDEX(crc)] ^ CRC32_SHIFTED(crc);
168  crc = m_tab[CRC32_INDEX(crc)] ^ CRC32_SHIFTED(crc);
169  n -= 4; s += 4;
170  }
171 
172  while (n--)
173  crc = m_tab[CRC32_INDEX(crc) ^ *s++] ^ CRC32_SHIFTED(crc);
174 
175  m_crc = crc;
176 }
177 
178 void CRC32::TruncatedFinal(byte *hash, size_t size)
179 {
180  ThrowIfInvalidTruncatedSize(size);
181 
182  m_crc ^= CRC32_NEGL;
183  for (size_t i=0; i<size; i++)
184  hash[i] = GetCrcByte(i);
185 
186  Reset();
187 }
188 
189 // Castagnoli CRC32C (iSCSI)
190 
191 const word32 CRC32C::m_tab[] = {
192 #if (CRYPTOPP_LITTLE_ENDIAN)
193  0x00000000L, 0xf26b8303L, 0xe13b70f7L, 0x1350f3f4L, 0xc79a971fL,
194  0x35f1141cL, 0x26a1e7e8L, 0xd4ca64ebL, 0x8ad958cfL, 0x78b2dbccL,
195  0x6be22838L, 0x9989ab3bL, 0x4d43cfd0L, 0xbf284cd3L, 0xac78bf27L,
196  0x5e133c24L, 0x105ec76fL, 0xe235446cL, 0xf165b798L, 0x030e349bL,
197  0xd7c45070L, 0x25afd373L, 0x36ff2087L, 0xc494a384L, 0x9a879fa0L,
198  0x68ec1ca3L, 0x7bbcef57L, 0x89d76c54L, 0x5d1d08bfL, 0xaf768bbcL,
199  0xbc267848L, 0x4e4dfb4bL, 0x20bd8edeL, 0xd2d60dddL, 0xc186fe29L,
200  0x33ed7d2aL, 0xe72719c1L, 0x154c9ac2L, 0x061c6936L, 0xf477ea35L,
201  0xaa64d611L, 0x580f5512L, 0x4b5fa6e6L, 0xb93425e5L, 0x6dfe410eL,
202  0x9f95c20dL, 0x8cc531f9L, 0x7eaeb2faL, 0x30e349b1L, 0xc288cab2L,
203  0xd1d83946L, 0x23b3ba45L, 0xf779deaeL, 0x05125dadL, 0x1642ae59L,
204  0xe4292d5aL, 0xba3a117eL, 0x4851927dL, 0x5b016189L, 0xa96ae28aL,
205  0x7da08661L, 0x8fcb0562L, 0x9c9bf696L, 0x6ef07595L, 0x417b1dbcL,
206  0xb3109ebfL, 0xa0406d4bL, 0x522bee48L, 0x86e18aa3L, 0x748a09a0L,
207  0x67dafa54L, 0x95b17957L, 0xcba24573L, 0x39c9c670L, 0x2a993584L,
208  0xd8f2b687L, 0x0c38d26cL, 0xfe53516fL, 0xed03a29bL, 0x1f682198L,
209  0x5125dad3L, 0xa34e59d0L, 0xb01eaa24L, 0x42752927L, 0x96bf4dccL,
210  0x64d4cecfL, 0x77843d3bL, 0x85efbe38L, 0xdbfc821cL, 0x2997011fL,
211  0x3ac7f2ebL, 0xc8ac71e8L, 0x1c661503L, 0xee0d9600L, 0xfd5d65f4L,
212  0x0f36e6f7L, 0x61c69362L, 0x93ad1061L, 0x80fde395L, 0x72966096L,
213  0xa65c047dL, 0x5437877eL, 0x4767748aL, 0xb50cf789L, 0xeb1fcbadL,
214  0x197448aeL, 0x0a24bb5aL, 0xf84f3859L, 0x2c855cb2L, 0xdeeedfb1L,
215  0xcdbe2c45L, 0x3fd5af46L, 0x7198540dL, 0x83f3d70eL, 0x90a324faL,
216  0x62c8a7f9L, 0xb602c312L, 0x44694011L, 0x5739b3e5L, 0xa55230e6L,
217  0xfb410cc2L, 0x092a8fc1L, 0x1a7a7c35L, 0xe811ff36L, 0x3cdb9bddL,
218  0xceb018deL, 0xdde0eb2aL, 0x2f8b6829L, 0x82f63b78L, 0x709db87bL,
219  0x63cd4b8fL, 0x91a6c88cL, 0x456cac67L, 0xb7072f64L, 0xa457dc90L,
220  0x563c5f93L, 0x082f63b7L, 0xfa44e0b4L, 0xe9141340L, 0x1b7f9043L,
221  0xcfb5f4a8L, 0x3dde77abL, 0x2e8e845fL, 0xdce5075cL, 0x92a8fc17L,
222  0x60c37f14L, 0x73938ce0L, 0x81f80fe3L, 0x55326b08L, 0xa759e80bL,
223  0xb4091bffL, 0x466298fcL, 0x1871a4d8L, 0xea1a27dbL, 0xf94ad42fL,
224  0x0b21572cL, 0xdfeb33c7L, 0x2d80b0c4L, 0x3ed04330L, 0xccbbc033L,
225  0xa24bb5a6L, 0x502036a5L, 0x4370c551L, 0xb11b4652L, 0x65d122b9L,
226  0x97baa1baL, 0x84ea524eL, 0x7681d14dL, 0x2892ed69L, 0xdaf96e6aL,
227  0xc9a99d9eL, 0x3bc21e9dL, 0xef087a76L, 0x1d63f975L, 0x0e330a81L,
228  0xfc588982L, 0xb21572c9L, 0x407ef1caL, 0x532e023eL, 0xa145813dL,
229  0x758fe5d6L, 0x87e466d5L, 0x94b49521L, 0x66df1622L, 0x38cc2a06L,
230  0xcaa7a905L, 0xd9f75af1L, 0x2b9cd9f2L, 0xff56bd19L, 0x0d3d3e1aL,
231  0x1e6dcdeeL, 0xec064eedL, 0xc38d26c4L, 0x31e6a5c7L, 0x22b65633L,
232  0xd0ddd530L, 0x0417b1dbL, 0xf67c32d8L, 0xe52cc12cL, 0x1747422fL,
233  0x49547e0bL, 0xbb3ffd08L, 0xa86f0efcL, 0x5a048dffL, 0x8ecee914L,
234  0x7ca56a17L, 0x6ff599e3L, 0x9d9e1ae0L, 0xd3d3e1abL, 0x21b862a8L,
235  0x32e8915cL, 0xc083125fL, 0x144976b4L, 0xe622f5b7L, 0xf5720643L,
236  0x07198540L, 0x590ab964L, 0xab613a67L, 0xb831c993L, 0x4a5a4a90L,
237  0x9e902e7bL, 0x6cfbad78L, 0x7fab5e8cL, 0x8dc0dd8fL, 0xe330a81aL,
238  0x115b2b19L, 0x020bd8edL, 0xf0605beeL, 0x24aa3f05L, 0xd6c1bc06L,
239  0xc5914ff2L, 0x37faccf1L, 0x69e9f0d5L, 0x9b8273d6L, 0x88d28022L,
240  0x7ab90321L, 0xae7367caL, 0x5c18e4c9L, 0x4f48173dL, 0xbd23943eL,
241  0xf36e6f75L, 0x0105ec76L, 0x12551f82L, 0xe03e9c81L, 0x34f4f86aL,
242  0xc69f7b69L, 0xd5cf889dL, 0x27a40b9eL, 0x79b737baL, 0x8bdcb4b9L,
243  0x988c474dL, 0x6ae7c44eL, 0xbe2da0a5L, 0x4c4623a6L, 0x5f16d052L,
244  0xad7d5351L
245 #else
246  0x00000000L, 0x03836bf2L, 0xf7703be1L, 0xf4f35013L, 0x1f979ac7L,
247  0x1c14f135L, 0xe8e7a126L, 0xeb64cad4L, 0xcf58d98aL, 0xccdbb278L,
248  0x3828e26bL, 0x3bab8999L, 0xd0cf434dL, 0xd34c28bfL, 0x27bf78acL,
249  0x243c135eL, 0x6fc75e10L, 0x6c4435e2L, 0x98b765f1L, 0x9b340e03L,
250  0x7050c4d7L, 0x73d3af25L, 0x8720ff36L, 0x84a394c4L, 0xa09f879aL,
251  0xa31cec68L, 0x57efbc7bL, 0x546cd789L, 0xbf081d5dL, 0xbc8b76afL,
252  0x487826bcL, 0x4bfb4d4eL, 0xde8ebd20L, 0xdd0dd6d2L, 0x29fe86c1L,
253  0x2a7ded33L, 0xc11927e7L, 0xc29a4c15L, 0x36691c06L, 0x35ea77f4L,
254  0x11d664aaL, 0x12550f58L, 0xe6a65f4bL, 0xe52534b9L, 0x0e41fe6dL,
255  0x0dc2959fL, 0xf931c58cL, 0xfab2ae7eL, 0xb149e330L, 0xb2ca88c2L,
256  0x4639d8d1L, 0x45bab323L, 0xaede79f7L, 0xad5d1205L, 0x59ae4216L,
257  0x5a2d29e4L, 0x7e113abaL, 0x7d925148L, 0x8961015bL, 0x8ae26aa9L,
258  0x6186a07dL, 0x6205cb8fL, 0x96f69b9cL, 0x9575f06eL, 0xbc1d7b41L,
259  0xbf9e10b3L, 0x4b6d40a0L, 0x48ee2b52L, 0xa38ae186L, 0xa0098a74L,
260  0x54fada67L, 0x5779b195L, 0x7345a2cbL, 0x70c6c939L, 0x8435992aL,
261  0x87b6f2d8L, 0x6cd2380cL, 0x6f5153feL, 0x9ba203edL, 0x9821681fL,
262  0xd3da2551L, 0xd0594ea3L, 0x24aa1eb0L, 0x27297542L, 0xcc4dbf96L,
263  0xcfced464L, 0x3b3d8477L, 0x38beef85L, 0x1c82fcdbL, 0x1f019729L,
264  0xebf2c73aL, 0xe871acc8L, 0x0315661cL, 0x00960deeL, 0xf4655dfdL,
265  0xf7e6360fL, 0x6293c661L, 0x6110ad93L, 0x95e3fd80L, 0x96609672L,
266  0x7d045ca6L, 0x7e873754L, 0x8a746747L, 0x89f70cb5L, 0xadcb1febL,
267  0xae487419L, 0x5abb240aL, 0x59384ff8L, 0xb25c852cL, 0xb1dfeedeL,
268  0x452cbecdL, 0x46afd53fL, 0x0d549871L, 0x0ed7f383L, 0xfa24a390L,
269  0xf9a7c862L, 0x12c302b6L, 0x11406944L, 0xe5b33957L, 0xe63052a5L,
270  0xc20c41fbL, 0xc18f2a09L, 0x357c7a1aL, 0x36ff11e8L, 0xdd9bdb3cL,
271  0xde18b0ceL, 0x2aebe0ddL, 0x29688b2fL, 0x783bf682L, 0x7bb89d70L,
272  0x8f4bcd63L, 0x8cc8a691L, 0x67ac6c45L, 0x642f07b7L, 0x90dc57a4L,
273  0x935f3c56L, 0xb7632f08L, 0xb4e044faL, 0x401314e9L, 0x43907f1bL,
274  0xa8f4b5cfL, 0xab77de3dL, 0x5f848e2eL, 0x5c07e5dcL, 0x17fca892L,
275  0x147fc360L, 0xe08c9373L, 0xe30ff881L, 0x086b3255L, 0x0be859a7L,
276  0xff1b09b4L, 0xfc986246L, 0xd8a47118L, 0xdb271aeaL, 0x2fd44af9L,
277  0x2c57210bL, 0xc733ebdfL, 0xc4b0802dL, 0x3043d03eL, 0x33c0bbccL,
278  0xa6b54ba2L, 0xa5362050L, 0x51c57043L, 0x52461bb1L, 0xb922d165L,
279  0xbaa1ba97L, 0x4e52ea84L, 0x4dd18176L, 0x69ed9228L, 0x6a6ef9daL,
280  0x9e9da9c9L, 0x9d1ec23bL, 0x767a08efL, 0x75f9631dL, 0x810a330eL,
281  0x828958fcL, 0xc97215b2L, 0xcaf17e40L, 0x3e022e53L, 0x3d8145a1L,
282  0xd6e58f75L, 0xd566e487L, 0x2195b494L, 0x2216df66L, 0x062acc38L,
283  0x05a9a7caL, 0xf15af7d9L, 0xf2d99c2bL, 0x19bd56ffL, 0x1a3e3d0dL,
284  0xeecd6d1eL, 0xed4e06ecL, 0xc4268dc3L, 0xc7a5e631L, 0x3356b622L,
285  0x30d5ddd0L, 0xdbb11704L, 0xd8327cf6L, 0x2cc12ce5L, 0x2f424717L,
286  0x0b7e5449L, 0x08fd3fbbL, 0xfc0e6fa8L, 0xff8d045aL, 0x14e9ce8eL,
287  0x176aa57cL, 0xe399f56fL, 0xe01a9e9dL, 0xabe1d3d3L, 0xa862b821L,
288  0x5c91e832L, 0x5f1283c0L, 0xb4764914L, 0xb7f522e6L, 0x430672f5L,
289  0x40851907L, 0x64b90a59L, 0x673a61abL, 0x93c931b8L, 0x904a5a4aL,
290  0x7b2e909eL, 0x78adfb6cL, 0x8c5eab7fL, 0x8fddc08dL, 0x1aa830e3L,
291  0x192b5b11L, 0xedd80b02L, 0xee5b60f0L, 0x053faa24L, 0x06bcc1d6L,
292  0xf24f91c5L, 0xf1ccfa37L, 0xd5f0e969L, 0xd673829bL, 0x2280d288L,
293  0x2103b97aL, 0xca6773aeL, 0xc9e4185cL, 0x3d17484fL, 0x3e9423bdL,
294  0x756f6ef3L, 0x76ec0501L, 0x821f5512L, 0x819c3ee0L, 0x6af8f434L,
295  0x697b9fc6L, 0x9d88cfd5L, 0x9e0ba427L, 0xba37b779L, 0xb9b4dc8bL,
296  0x4d478c98L, 0x4ec4e76aL, 0xa5a02dbeL, 0xa623464cL, 0x52d0165fL,
297  0x51537dadL
298 #endif
299 };
300 
301 std::string CRC32C::AlgorithmProvider() const
302 {
303 #if (CRYPTOPP_ARM_CRC32_AVAILABLE)
304  if (HasCRC32())
305  return "ARMv8";
306 #endif
307 #if (CRYPTOPP_SSE42_AVAILABLE)
308  if (HasSSE42())
309  return "SSE4.2";
310 #endif
311  return "C++";
312 }
313 
314 CRC32C::CRC32C()
315 {
316  Reset();
317 }
318 
319 void CRC32C::Update(const byte *s, size_t n)
320 {
321 #if (CRYPTOPP_SSE42_AVAILABLE)
322  if (HasSSE42())
323  {
324  CRC32C_Update_SSE42(s, n, m_crc);
325  return;
326  }
327 #elif (CRYPTOPP_ARM_CRC32_AVAILABLE)
328  if (HasCRC32())
329  {
330  CRC32C_Update_ARMV8(s, n, m_crc);
331  return;
332  }
333 #endif
334 
335  word32 crc = m_crc;
336 
337  for(; !IsAligned<word32>(s) && n > 0; n--)
338  crc = m_tab[CRC32_INDEX(crc) ^ *s++] ^ CRC32_SHIFTED(crc);
339 
340  while (n >= 4)
341  {
342  crc ^= *(const word32 *)(void*)s;
343  crc = m_tab[CRC32_INDEX(crc)] ^ CRC32_SHIFTED(crc);
344  crc = m_tab[CRC32_INDEX(crc)] ^ CRC32_SHIFTED(crc);
345  crc = m_tab[CRC32_INDEX(crc)] ^ CRC32_SHIFTED(crc);
346  crc = m_tab[CRC32_INDEX(crc)] ^ CRC32_SHIFTED(crc);
347  n -= 4; s += 4;
348  }
349 
350  while (n--)
351  crc = m_tab[CRC32_INDEX(crc) ^ *s++] ^ CRC32_SHIFTED(crc);
352 
353  m_crc = crc;
354 }
355 
356 void CRC32C::TruncatedFinal(byte *hash, size_t size)
357 {
358  ThrowIfInvalidTruncatedSize(size);
359 
360  m_crc ^= CRC32_NEGL;
361  for (size_t i=0; i<size; i++)
362  hash[i] = GetCrcByte(i);
363 
364  Reset();
365 }
366 
367 NAMESPACE_END
CRC32C::AlgorithmProvider
std::string AlgorithmProvider() const
Retrieve the provider of this algorithm.
Definition: crc.cpp:301
crc.h
Classes for CRC-32 and CRC-32C checksum algorithm.
pch.h
Precompiled header file.
word32
unsigned int word32
32-bit unsigned datatype
Definition: config_int.h:62
CRC32C::Update
void Update(const byte *input, size_t length)
Updates a hash with additional input.
Definition: crc.cpp:319
CRC32::Update
void Update(const byte *input, size_t length)
Updates a hash with additional input.
Definition: crc.cpp:147
misc.h
Utility functions for the Crypto++ library.
CRC32::TruncatedFinal
void TruncatedFinal(byte *hash, size_t size)
Computes the hash of the current message.
Definition: crc.cpp:178
cpu.h
Functions for CPU features and intrinsics.
CRC32::AlgorithmProvider
std::string AlgorithmProvider() const
Retrieve the provider of this algorithm.
Definition: crc.cpp:133
CryptoPP
Crypto++ library namespace.
config.h
Library configuration file.
CRC32C::TruncatedFinal
void TruncatedFinal(byte *hash, size_t size)
Computes the hash of the current message.
Definition: crc.cpp:356