license headers in libnetxms changed to LGPL
[public/netxms.git] / src / libnetxms / hash.cpp
1 /*
2 ** NetXMS - Network Management System
3 ** Utility Library
4 ** Copyright (C) 2003-2010 Victor Kirhenshtein
5 **
6 ** This program is free software; you can redistribute it and/or modify
7 ** it under the terms of the GNU Lesser General Public License as published
8 ** by the Free Software Foundation; either version 3 of the License, or
9 ** (at your option) any later version.
10 **
11 ** This program is distributed in the hope that it will be useful,
12 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
13 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 ** GNU General Public License for more details.
15 **
16 ** You should have received a copy of the GNU Lesser General Public License
17 ** along with this program; if not, write to the Free Software
18 ** Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 **
20 ** File: hash.cpp
21 **
22 **/
23
24 #include "libnetxms.h"
25 #include "md5.h"
26 #include "sha1.h"
27
28 #if defined(_WIN32) && !defined(UNDER_CE)
29 # include <io.h>
30 #endif
31
32
33 //
34 // Constants
35 //
36
37 #define FILE_BLOCK_SIZE 4096
38
39
40 //
41 // Table for CRC calculation
42 //
43
44 static DWORD crctab[256]=
45 {
46 0x00000000,
47 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
48 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e,
49 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
50 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, 0x1adad47d,
51 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856, 0x646ba8c0,
52 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, 0xfa0f3d63,
53 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
54 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa,
55 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75,
56 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a, 0xc8d75180,
57 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
58 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, 0x2f6f7c87,
59 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106,
60 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5,
61 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818,
62 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01, 0x6b6b51f4,
63 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, 0x1b01a57b,
64 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea,
65 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
66 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541,
67 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc,
68 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5, 0xaa0a4c5f,
69 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086,
70 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, 0x5edef90e,
71 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81,
72 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c,
73 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
74 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b,
75 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344, 0x8708a3d2,
76 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, 0x196c3671,
77 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
78 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8,
79 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767,
80 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c, 0x36034af6,
81 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
82 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, 0xcc0c7795,
83 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28,
84 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b,
85 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a,
86 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713, 0x95bf4a82,
87 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b, 0xe5d5be0d,
88 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8,
89 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
90 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff,
91 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee,
92 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7, 0x4969474d,
93 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0,
94 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, 0xbdbdf21c,
95 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693,
96 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02,
97 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
98 };
99
100
101 //
102 // Calculate CRC32 for buffer of specified length
103 //
104
105 DWORD LIBNETXMS_EXPORTABLE CalculateCRC32(const unsigned char *pData,
106 DWORD nBytes, DWORD dwCRC = 0)
107 {
108 dwCRC = ~dwCRC;
109
110 while (nBytes-- != 0)
111 {
112 dwCRC = (dwCRC >> 8) ^ crctab[(dwCRC & 0xFF) ^ *pData++];
113 }
114
115 return ~dwCRC;
116 }
117
118
119 //
120 // Calculate MD5 hash for array of bytes
121 //
122
123 void LIBNETXMS_EXPORTABLE CalculateMD5Hash(const unsigned char *data, size_t nbytes, BYTE *hash)
124 {
125 md5_state_t state;
126
127 I_md5_init(&state);
128 I_md5_append(&state, (const md5_byte_t *)data, (int)nbytes);
129 I_md5_finish(&state, (md5_byte_t *)hash);
130 }
131
132
133 //
134 // Calculate MD5 hash for repeated pattern in virtual buffer
135 //
136
137 void LIBNETXMS_EXPORTABLE MD5HashForPattern(const unsigned char *data, size_t patternSize, size_t fullSize, BYTE *hash)
138 {
139 md5_state_t state;
140 int count, patternIndex;
141 const unsigned char *src;
142 BYTE *dst, patternBuffer[64];
143
144 I_md5_init(&state);
145 for(count = 0, src = data, patternIndex = 0; count < (int)fullSize; count += 64)
146 {
147 dst = patternBuffer;
148 for(int i = 0; i < 64; i++)
149 {
150 *dst++ = *src++;
151 patternIndex++;
152 if (patternIndex >= (int)patternSize)
153 {
154 patternIndex = 0;
155 src = data;
156 }
157 }
158 I_md5_append(&state, (const md5_byte_t *)patternBuffer, 64);
159 }
160 I_md5_finish(&state, (md5_byte_t *)hash);
161 }
162
163
164 //
165 // Calculate SHA1 hash for array of bytes
166 //
167
168 void LIBNETXMS_EXPORTABLE CalculateSHA1Hash(unsigned char *data, size_t nbytes, BYTE *hash)
169 {
170 SHA1_CTX context;
171
172 I_SHA1Init(&context);
173 I_SHA1Update(&context, data, (uint32)nbytes);
174 I_SHA1Final(hash, &context);
175 }
176
177
178 //
179 // Calculate SHA1 hash for repeated pattern in virtual buffer
180 //
181
182 void LIBNETXMS_EXPORTABLE SHA1HashForPattern(unsigned char *data, size_t patternSize, size_t fullSize, BYTE *hash)
183 {
184 SHA1_CTX context;
185 int count, patternIndex;
186 const unsigned char *src;
187 BYTE *dst, patternBuffer[64];
188
189 I_SHA1Init(&context);
190 for(count = 0, src = data, patternIndex = 0; count < (int)fullSize; count += 64)
191 {
192 dst = patternBuffer;
193 for(int i = 0; i < 64; i++)
194 {
195 *dst++ = *src++;
196 patternIndex++;
197 if (patternIndex >= (int)patternSize)
198 {
199 patternIndex = 0;
200 src = data;
201 }
202 }
203 I_SHA1Update(&context, patternBuffer, 64);
204 }
205 I_SHA1Final(hash, &context);
206 }
207
208
209 //
210 // Calculate MD5 hash for given file
211 //
212
213 BOOL LIBNETXMS_EXPORTABLE CalculateFileMD5Hash(const TCHAR *pszFileName, BYTE *pHash)
214 {
215 size_t iSize;
216 md5_state_t state;
217 char szBuffer[FILE_BLOCK_SIZE];
218 BOOL bSuccess = FALSE;
219 FILE *fileHandle;
220
221 fileHandle = _tfopen(pszFileName, _T("rb"));
222 if (fileHandle != NULL)
223 {
224 I_md5_init(&state);
225 while(1)
226 {
227 iSize = fread(szBuffer, 1, FILE_BLOCK_SIZE, fileHandle);
228 if (iSize <= 0)
229 break;
230 I_md5_append(&state, (const md5_byte_t *)szBuffer, (int)iSize);
231 }
232 fclose(fileHandle);
233 if (iSize == 0)
234 {
235 I_md5_finish(&state, (md5_byte_t *)pHash);
236 bSuccess = TRUE;
237 }
238 }
239 return bSuccess;
240 }
241
242 //
243 // Calculate SHA1 hash for given file
244 //
245
246 BOOL LIBNETXMS_EXPORTABLE CalculateFileSHA1Hash(const TCHAR *pszFileName, BYTE *pHash)
247 {
248 size_t iSize;
249 FILE *fileHandle;
250 SHA1_CTX context;
251 char szBuffer[FILE_BLOCK_SIZE];
252 BOOL bSuccess = FALSE;
253
254 fileHandle = _tfopen(pszFileName, _T("rb"));
255 if (fileHandle != NULL)
256 {
257 I_SHA1Init(&context);
258 while(1)
259 {
260 iSize = fread(szBuffer, 1, FILE_BLOCK_SIZE, fileHandle);
261 if (iSize <= 0)
262 break;
263 I_SHA1Update(&context, (BYTE *)szBuffer, (uint32)iSize);
264 }
265 fclose(fileHandle);
266 if (iSize == 0)
267 {
268 I_SHA1Final(pHash, &context);
269 bSuccess = TRUE;
270 }
271 }
272 return bSuccess;
273 }
274
275 //
276 // Calculate CRC32 for given file
277 //
278
279 BOOL LIBNETXMS_EXPORTABLE CalculateFileCRC32(const TCHAR *pszFileName, DWORD *pResult)
280 {
281 size_t iSize;
282 unsigned char szBuffer[FILE_BLOCK_SIZE];
283 BOOL bSuccess = FALSE;
284 FILE *fileHandle;
285
286 fileHandle = _tfopen(pszFileName, _T("rb"));
287 if (fileHandle != NULL)
288 {
289 *pResult = 0;
290 while(1)
291 {
292 iSize = fread(szBuffer, 1, FILE_BLOCK_SIZE, fileHandle);
293 if (iSize <= 0)
294 break;
295 *pResult = CalculateCRC32(szBuffer, (DWORD)iSize, *pResult);
296 }
297 fclose(fileHandle);
298 if (iSize == 0)
299 {
300 bSuccess = TRUE;
301 }
302 }
303 return bSuccess;
304 }
305