/src/botan/src/lib/hash/checksum/crc32/crc32.cpp
Line | Count | Source (jump to first uncovered line) |
1 | | /* |
2 | | * CRC32 |
3 | | * (C) 1999-2007 Jack Lloyd |
4 | | * |
5 | | * Botan is released under the Simplified BSD License (see license.txt) |
6 | | */ |
7 | | |
8 | | #include <botan/crc32.h> |
9 | | #include <botan/loadstor.h> |
10 | | |
11 | | namespace Botan { |
12 | | |
13 | | std::unique_ptr<HashFunction> CRC32::copy_state() const |
14 | 0 | { |
15 | 0 | return std::unique_ptr<HashFunction>(new CRC32(*this)); |
16 | 0 | } |
17 | | |
18 | | /* |
19 | | * Update a CRC32 Checksum |
20 | | */ |
21 | | void CRC32::add_data(const uint8_t input[], size_t length) |
22 | 0 | { |
23 | 0 | const uint32_t TABLE[256] = { |
24 | 0 | 0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F, |
25 | 0 | 0xE963A535, 0x9E6495A3, 0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988, |
26 | 0 | 0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91, 0x1DB71064, 0x6AB020F2, |
27 | 0 | 0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7, |
28 | 0 | 0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9, |
29 | 0 | 0xFA0F3D63, 0x8D080DF5, 0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172, |
30 | 0 | 0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B, 0x35B5A8FA, 0x42B2986C, |
31 | 0 | 0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59, |
32 | 0 | 0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423, |
33 | 0 | 0xCFBA9599, 0xB8BDA50F, 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924, |
34 | 0 | 0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D, 0x76DC4190, 0x01DB7106, |
35 | 0 | 0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433, |
36 | 0 | 0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D, |
37 | 0 | 0x91646C97, 0xE6635C01, 0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E, |
38 | 0 | 0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457, 0x65B0D9C6, 0x12B7E950, |
39 | 0 | 0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65, |
40 | 0 | 0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7, |
41 | 0 | 0xA4D1C46D, 0xD3D6F4FB, 0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0, |
42 | 0 | 0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9, 0x5005713C, 0x270241AA, |
43 | 0 | 0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F, |
44 | 0 | 0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81, |
45 | 0 | 0xB7BD5C3B, 0xC0BA6CAD, 0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A, |
46 | 0 | 0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683, 0xE3630B12, 0x94643B84, |
47 | 0 | 0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1, |
48 | 0 | 0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB, |
49 | 0 | 0x196C3671, 0x6E6B06E7, 0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC, |
50 | 0 | 0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5, 0xD6D6A3E8, 0xA1D1937E, |
51 | 0 | 0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B, |
52 | 0 | 0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55, |
53 | 0 | 0x316E8EEF, 0x4669BE79, 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236, |
54 | 0 | 0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F, 0xC5BA3BBE, 0xB2BD0B28, |
55 | 0 | 0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D, |
56 | 0 | 0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F, |
57 | 0 | 0x72076785, 0x05005713, 0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38, |
58 | 0 | 0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21, 0x86D3D2D4, 0xF1D4E242, |
59 | 0 | 0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777, |
60 | 0 | 0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69, |
61 | 0 | 0x616BFFD3, 0x166CCF45, 0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2, |
62 | 0 | 0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB, 0xAED16A4A, 0xD9D65ADC, |
63 | 0 | 0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9, |
64 | 0 | 0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605, 0xCDD70693, |
65 | 0 | 0x54DE5729, 0x23D967BF, 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94, |
66 | 0 | 0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D }; |
67 | 0 |
|
68 | 0 | uint32_t tmp = m_crc; |
69 | 0 | while(length >= 16) |
70 | 0 | { |
71 | 0 | tmp = TABLE[(tmp ^ input[ 0]) & 0xFF] ^ (tmp >> 8); |
72 | 0 | tmp = TABLE[(tmp ^ input[ 1]) & 0xFF] ^ (tmp >> 8); |
73 | 0 | tmp = TABLE[(tmp ^ input[ 2]) & 0xFF] ^ (tmp >> 8); |
74 | 0 | tmp = TABLE[(tmp ^ input[ 3]) & 0xFF] ^ (tmp >> 8); |
75 | 0 | tmp = TABLE[(tmp ^ input[ 4]) & 0xFF] ^ (tmp >> 8); |
76 | 0 | tmp = TABLE[(tmp ^ input[ 5]) & 0xFF] ^ (tmp >> 8); |
77 | 0 | tmp = TABLE[(tmp ^ input[ 6]) & 0xFF] ^ (tmp >> 8); |
78 | 0 | tmp = TABLE[(tmp ^ input[ 7]) & 0xFF] ^ (tmp >> 8); |
79 | 0 | tmp = TABLE[(tmp ^ input[ 8]) & 0xFF] ^ (tmp >> 8); |
80 | 0 | tmp = TABLE[(tmp ^ input[ 9]) & 0xFF] ^ (tmp >> 8); |
81 | 0 | tmp = TABLE[(tmp ^ input[10]) & 0xFF] ^ (tmp >> 8); |
82 | 0 | tmp = TABLE[(tmp ^ input[11]) & 0xFF] ^ (tmp >> 8); |
83 | 0 | tmp = TABLE[(tmp ^ input[12]) & 0xFF] ^ (tmp >> 8); |
84 | 0 | tmp = TABLE[(tmp ^ input[13]) & 0xFF] ^ (tmp >> 8); |
85 | 0 | tmp = TABLE[(tmp ^ input[14]) & 0xFF] ^ (tmp >> 8); |
86 | 0 | tmp = TABLE[(tmp ^ input[15]) & 0xFF] ^ (tmp >> 8); |
87 | 0 | input += 16; |
88 | 0 | length -= 16; |
89 | 0 | } |
90 | 0 |
|
91 | 0 | for(size_t i = 0; i != length; ++i) |
92 | 0 | tmp = TABLE[(tmp ^ input[i]) & 0xFF] ^ (tmp >> 8); |
93 | 0 |
|
94 | 0 | m_crc = tmp; |
95 | 0 | } |
96 | | |
97 | | /* |
98 | | * Finalize a CRC32 Checksum |
99 | | */ |
100 | | void CRC32::final_result(uint8_t output[]) |
101 | 0 | { |
102 | 0 | m_crc ^= 0xFFFFFFFF; |
103 | 0 | store_be(m_crc, output); |
104 | 0 | clear(); |
105 | 0 | } |
106 | | |
107 | | } |