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1/* Taken from ReHash (see http://www.reichlsoft.de.vu/) and released
2 * under GPL/LGPL with permission from ReHash author
3 * Dominik Reichl <dominik.reichl@t-online.de>, Germany
4 */
5
6/*
7 **********************************************************************
8 ** MD5.cpp **
9 ** **
10 ** - Style modified by Tony Ray, January 2001 **
11 ** Added support for randomizing initialization constants **
12 ** - Style modified by Dominik Reichl, April 2003 **
13 ** Optimized code **
14 ** **
15 ** MD5.c **
16 ** RSA Data Security, Inc. MD5 Message Digest Algorithm **
17 ** Created: 2/17/90 RLR **
18 ** Revised: 1/91 SRD,AJ,BSK,JT Reference C Version **
19 **********************************************************************
20 */
21
22/*
23 **********************************************************************
24 ** MD5.h -- Header file for implementation of MD5 **
25 ** RSA Data Security, Inc. MD5 Message Digest Algorithm **
26 ** Created: 2/17/90 RLR **
27 ** Revised: 12/27/90 SRD,AJ,BSK,JT Reference C version **
28 ** Revised (for MD5): RLR 4/27/91 **
29 ** -- G modified to have y&~z instead of y&z **
30 ** -- FF, GG, HH modified to add in last register done **
31 ** -- Access pattern: round 2 works mod 5, round 3 works mod 3 **
32 ** -- distinct additive constant for each step **
33 ** -- round 4 added, working mod 7 **
34 **********************************************************************
35 */
36
37/*
38 **********************************************************************
39 ** Copyright (C) 1990, RSA Data Security, Inc. All rights reserved. **
40 ** **
41 ** License to copy and use this software is granted provided that **
42 ** it is identified as the "RSA Data Security, Inc. MD5 Message **
43 ** Digest Algorithm" in all material mentioning or referencing this **
44 ** software or this function. **
45 ** **
46 ** License is also granted to make and use derivative works **
47 ** provided that such works are identified as "derived from the RSA **
48 ** Data Security, Inc. MD5 Message Digest Algorithm" in all **
49 ** material mentioning or referencing the derived work. **
50 ** **
51 ** RSA Data Security, Inc. makes no representations concerning **
52 ** either the merchantability of this software or the suitability **
53 ** of this software for any particular purpose. It is provided "as **
54 ** is" without express or implied warranty of any kind. **
55 ** **
56 ** These notices must be retained in any copies of any part of this **
57 ** documentation and/or software. **
58 **********************************************************************
59 */
60
61#include <stdio.h>
62#include <stdlib.h>
63
64#include "md5.h"
65
66/* Typedef a 32 bit type */
67#ifndef UINT4
68typedef unsigned long int UINT4;
69#endif
70
71/* Data structure for MD5 (Message Digest) computation */
72typedef struct {
73 UINT4 i[2]; /* Number of _bits_ handled mod 2^64 */
74 UINT4 buf[4]; /* Scratch buffer */
75 unsigned char in[64]; /* Input buffer */
76 unsigned char digest[16]; /* Actual digest after MD5Final call */
77} MD5_CTX;
78
79/* Padding */
80static unsigned char MD5_PADDING[64] = {
81 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
82 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
83 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
84 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
85 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
86 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
87 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
88 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
89};
90
91/* MD5_F, MD5_G and MD5_H are basic MD5 functions: selection, majority, parity */
92#define MD5_F(x, y, z) (((x) & (y)) | ((~x) & (z)))
93#define MD5_G(x, y, z) (((x) & (z)) | ((y) & (~z)))
94#define MD5_H(x, y, z) ((x) ^ (y) ^ (z))
95#define MD5_I(x, y, z) ((y) ^ ((x) | (~z)))
96
97/* ROTATE_LEFT rotates x left n bits */
98#ifndef ROTATE_LEFT
99#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
100#endif
101
102/* MD5_FF, MD5_GG, MD5_HH, and MD5_II transformations for rounds 1, 2, 3, and 4 */
103/* Rotation is separate from addition to prevent recomputation */
104#define MD5_FF(a, b, c, d, x, s, ac) {(a) += MD5_F ((b), (c), (d)) + (x) + (UINT4)(ac); (a) = ROTATE_LEFT ((a), (s)); (a) += (b); }
105#define MD5_GG(a, b, c, d, x, s, ac) {(a) += MD5_G ((b), (c), (d)) + (x) + (UINT4)(ac); (a) = ROTATE_LEFT ((a), (s)); (a) += (b); }
106#define MD5_HH(a, b, c, d, x, s, ac) {(a) += MD5_H ((b), (c), (d)) + (x) + (UINT4)(ac); (a) = ROTATE_LEFT ((a), (s)); (a) += (b); }
107#define MD5_II(a, b, c, d, x, s, ac) {(a) += MD5_I ((b), (c), (d)) + (x) + (UINT4)(ac); (a) = ROTATE_LEFT ((a), (s)); (a) += (b); }
108
109/* Constants for transformation */
110#define MD5_S11 7 /* Round 1 */
111#define MD5_S12 12
112#define MD5_S13 17
113#define MD5_S14 22
114#define MD5_S21 5 /* Round 2 */
115#define MD5_S22 9
116#define MD5_S23 14
117#define MD5_S24 20
118#define MD5_S31 4 /* Round 3 */
119#define MD5_S32 11
120#define MD5_S33 16
121#define MD5_S34 23
122#define MD5_S41 6 /* Round 4 */
123#define MD5_S42 10
124#define MD5_S43 15
125#define MD5_S44 21
126
127/* Basic MD5 step. MD5_Transform buf based on in */
128static void MD5_Transform (UINT4 *buf, UINT4 *in)
129{
130 UINT4 a = buf[0], b = buf[1], c = buf[2], d = buf[3];
131
132 /* Round 1 */
133 MD5_FF ( a, b, c, d, in[ 0], MD5_S11, (UINT4) 3614090360u); /* 1 */
134 MD5_FF ( d, a, b, c, in[ 1], MD5_S12, (UINT4) 3905402710u); /* 2 */
135 MD5_FF ( c, d, a, b, in[ 2], MD5_S13, (UINT4) 606105819u); /* 3 */
136 MD5_FF ( b, c, d, a, in[ 3], MD5_S14, (UINT4) 3250441966u); /* 4 */
137 MD5_FF ( a, b, c, d, in[ 4], MD5_S11, (UINT4) 4118548399u); /* 5 */
138 MD5_FF ( d, a, b, c, in[ 5], MD5_S12, (UINT4) 1200080426u); /* 6 */
139 MD5_FF ( c, d, a, b, in[ 6], MD5_S13, (UINT4) 2821735955u); /* 7 */
140 MD5_FF ( b, c, d, a, in[ 7], MD5_S14, (UINT4) 4249261313u); /* 8 */
141 MD5_FF ( a, b, c, d, in[ 8], MD5_S11, (UINT4) 1770035416u); /* 9 */
142 MD5_FF ( d, a, b, c, in[ 9], MD5_S12, (UINT4) 2336552879u); /* 10 */
143 MD5_FF ( c, d, a, b, in[10], MD5_S13, (UINT4) 4294925233u); /* 11 */
144 MD5_FF ( b, c, d, a, in[11], MD5_S14, (UINT4) 2304563134u); /* 12 */
145 MD5_FF ( a, b, c, d, in[12], MD5_S11, (UINT4) 1804603682u); /* 13 */
146 MD5_FF ( d, a, b, c, in[13], MD5_S12, (UINT4) 4254626195u); /* 14 */
147 MD5_FF ( c, d, a, b, in[14], MD5_S13, (UINT4) 2792965006u); /* 15 */
148 MD5_FF ( b, c, d, a, in[15], MD5_S14, (UINT4) 1236535329u); /* 16 */
149
150 /* Round 2 */
151 MD5_GG ( a, b, c, d, in[ 1], MD5_S21, (UINT4) 4129170786u); /* 17 */
152 MD5_GG ( d, a, b, c, in[ 6], MD5_S22, (UINT4) 3225465664u); /* 18 */
153 MD5_GG ( c, d, a, b, in[11], MD5_S23, (UINT4) 643717713u); /* 19 */
154 MD5_GG ( b, c, d, a, in[ 0], MD5_S24, (UINT4) 3921069994u); /* 20 */
155 MD5_GG ( a, b, c, d, in[ 5], MD5_S21, (UINT4) 3593408605u); /* 21 */
156 MD5_GG ( d, a, b, c, in[10], MD5_S22, (UINT4) 38016083u); /* 22 */
157 MD5_GG ( c, d, a, b, in[15], MD5_S23, (UINT4) 3634488961u); /* 23 */
158 MD5_GG ( b, c, d, a, in[ 4], MD5_S24, (UINT4) 3889429448u); /* 24 */
159 MD5_GG ( a, b, c, d, in[ 9], MD5_S21, (UINT4) 568446438u); /* 25 */
160 MD5_GG ( d, a, b, c, in[14], MD5_S22, (UINT4) 3275163606u); /* 26 */
161 MD5_GG ( c, d, a, b, in[ 3], MD5_S23, (UINT4) 4107603335u); /* 27 */
162 MD5_GG ( b, c, d, a, in[ 8], MD5_S24, (UINT4) 1163531501u); /* 28 */
163 MD5_GG ( a, b, c, d, in[13], MD5_S21, (UINT4) 2850285829u); /* 29 */
164 MD5_GG ( d, a, b, c, in[ 2], MD5_S22, (UINT4) 4243563512u); /* 30 */
165 MD5_GG ( c, d, a, b, in[ 7], MD5_S23, (UINT4) 1735328473u); /* 31 */
166 MD5_GG ( b, c, d, a, in[12], MD5_S24, (UINT4) 2368359562u); /* 32 */
167
168 /* Round 3 */
169 MD5_HH ( a, b, c, d, in[ 5], MD5_S31, (UINT4) 4294588738u); /* 33 */
170 MD5_HH ( d, a, b, c, in[ 8], MD5_S32, (UINT4) 2272392833u); /* 34 */
171 MD5_HH ( c, d, a, b, in[11], MD5_S33, (UINT4) 1839030562u); /* 35 */
172 MD5_HH ( b, c, d, a, in[14], MD5_S34, (UINT4) 4259657740u); /* 36 */
173 MD5_HH ( a, b, c, d, in[ 1], MD5_S31, (UINT4) 2763975236u); /* 37 */
174 MD5_HH ( d, a, b, c, in[ 4], MD5_S32, (UINT4) 1272893353u); /* 38 */
175 MD5_HH ( c, d, a, b, in[ 7], MD5_S33, (UINT4) 4139469664u); /* 39 */
176 MD5_HH ( b, c, d, a, in[10], MD5_S34, (UINT4) 3200236656u); /* 40 */
177 MD5_HH ( a, b, c, d, in[13], MD5_S31, (UINT4) 681279174u); /* 41 */
178 MD5_HH ( d, a, b, c, in[ 0], MD5_S32, (UINT4) 3936430074u); /* 42 */
179 MD5_HH ( c, d, a, b, in[ 3], MD5_S33, (UINT4) 3572445317u); /* 43 */
180 MD5_HH ( b, c, d, a, in[ 6], MD5_S34, (UINT4) 76029189u); /* 44 */
181 MD5_HH ( a, b, c, d, in[ 9], MD5_S31, (UINT4) 3654602809u); /* 45 */
182 MD5_HH ( d, a, b, c, in[12], MD5_S32, (UINT4) 3873151461u); /* 46 */
183 MD5_HH ( c, d, a, b, in[15], MD5_S33, (UINT4) 530742520u); /* 47 */
184 MD5_HH ( b, c, d, a, in[ 2], MD5_S34, (UINT4) 3299628645u); /* 48 */
185
186 /* Round 4 */
187 MD5_II ( a, b, c, d, in[ 0], MD5_S41, (UINT4) 4096336452u); /* 49 */
188 MD5_II ( d, a, b, c, in[ 7], MD5_S42, (UINT4) 1126891415u); /* 50 */
189 MD5_II ( c, d, a, b, in[14], MD5_S43, (UINT4) 2878612391u); /* 51 */
190 MD5_II ( b, c, d, a, in[ 5], MD5_S44, (UINT4) 4237533241u); /* 52 */
191 MD5_II ( a, b, c, d, in[12], MD5_S41, (UINT4) 1700485571u); /* 53 */
192 MD5_II ( d, a, b, c, in[ 3], MD5_S42, (UINT4) 2399980690u); /* 54 */
193 MD5_II ( c, d, a, b, in[10], MD5_S43, (UINT4) 4293915773u); /* 55 */
194 MD5_II ( b, c, d, a, in[ 1], MD5_S44, (UINT4) 2240044497u); /* 56 */
195 MD5_II ( a, b, c, d, in[ 8], MD5_S41, (UINT4) 1873313359u); /* 57 */
196 MD5_II ( d, a, b, c, in[15], MD5_S42, (UINT4) 4264355552u); /* 58 */
197 MD5_II ( c, d, a, b, in[ 6], MD5_S43, (UINT4) 2734768916u); /* 59 */
198 MD5_II ( b, c, d, a, in[13], MD5_S44, (UINT4) 1309151649u); /* 60 */
199 MD5_II ( a, b, c, d, in[ 4], MD5_S41, (UINT4) 4149444226u); /* 61 */
200 MD5_II ( d, a, b, c, in[11], MD5_S42, (UINT4) 3174756917u); /* 62 */
201 MD5_II ( c, d, a, b, in[ 2], MD5_S43, (UINT4) 718787259u); /* 63 */
202 MD5_II ( b, c, d, a, in[ 9], MD5_S44, (UINT4) 3951481745u); /* 64 */
203
204 buf[0] += a;
205 buf[1] += b;
206 buf[2] += c;
207 buf[3] += d;
208}
209
210// Set pseudoRandomNumber to zero for RFC MD5 implementation
211void MD5Init (MD5_CTX *mdContext, unsigned long pseudoRandomNumber)
212{
213 mdContext->i[0] = mdContext->i[1] = (UINT4)0;
214
215 /* Load magic initialization constants */
216 mdContext->buf[0] = (UINT4)0x67452301 + (pseudoRandomNumber * 11);
217 mdContext->buf[1] = (UINT4)0xefcdab89 + (pseudoRandomNumber * 71);
218 mdContext->buf[2] = (UINT4)0x98badcfe + (pseudoRandomNumber * 37);
219 mdContext->buf[3] = (UINT4)0x10325476 + (pseudoRandomNumber * 97);
220}
221
222void MD5Update (MD5_CTX *mdContext, unsigned char *inBuf, unsigned int inLen)
223{
224 UINT4 in[16];
225 int mdi = 0;
226 unsigned int i = 0, ii = 0;
227
228 /* Compute number of bytes mod 64 */
229 mdi = (int)((mdContext->i[0] >> 3) & 0x3F);
230
231 /* Update number of bits */
232 if ((mdContext->i[0] + ((UINT4)inLen << 3)) < mdContext->i[0]) mdContext->i[1]++;
233 mdContext->i[0] += ((UINT4)inLen << 3);
234 mdContext->i[1] += ((UINT4)inLen >> 29);
235
236 while (inLen--) {
237 /* Add new character to buffer, increment mdi */
238 mdContext->in[mdi++] = *inBuf++;
239
240 /* Transform if necessary */
241 if (mdi == 0x40) {
242 for (i = 0, ii = 0; i < 16; i++, ii += 4)
243 in[i] = (((UINT4)mdContext->in[ii+3]) << 24) |
244 (((UINT4)mdContext->in[ii+2]) << 16) |
245 (((UINT4)mdContext->in[ii+1]) << 8) |
246 ((UINT4)mdContext->in[ii]);
247
248 MD5_Transform (mdContext->buf, in);
249 mdi = 0;
250 }
251 }
252}
253
254void MD5Final (MD5_CTX *mdContext)
255{
256 UINT4 in[16];
257 int mdi = 0;
258 unsigned int i = 0, ii = 0, padLen = 0;
259
260 /* Save number of bits */
261 in[14] = mdContext->i[0];
262 in[15] = mdContext->i[1];
263
264 /* Compute number of bytes mod 64 */
265 mdi = (int)((mdContext->i[0] >> 3) & 0x3F);
266
267 /* Pad out to 56 mod 64 */
268 padLen = (mdi < 56) ? (56 - mdi) : (120 - mdi);
269 MD5Update (mdContext, MD5_PADDING, padLen);
270
271 /* Append length in bits and transform */
272 for (i = 0, ii = 0; i < 14; i++, ii += 4)
273 in[i] = (((UINT4)mdContext->in[ii+3]) << 24) |
274 (((UINT4)mdContext->in[ii+2]) << 16) |
275 (((UINT4)mdContext->in[ii+1]) << 8) |
276 ((UINT4)mdContext->in[ii]);
277 MD5_Transform (mdContext->buf, in);
278
279 /* Store buffer in digest */
280 for (i = 0, ii = 0; i < 4; i++, ii += 4) {
281 mdContext->digest[ii] = (unsigned char)( mdContext->buf[i] & 0xFF);
282 mdContext->digest[ii+1] = (unsigned char)((mdContext->buf[i] >> 8) & 0xFF);
283 mdContext->digest[ii+2] = (unsigned char)((mdContext->buf[i] >> 16) & 0xFF);
284 mdContext->digest[ii+3] = (unsigned char)((mdContext->buf[i] >> 24) & 0xFF);
285 }
286}
287
288void CalculateMD5(unsigned char *buffer, int length, unsigned char *checksum)
289{
290 int i;
291 MD5_CTX m_md5;
292
293 MD5Init(&m_md5, 0);
294 MD5Update(&m_md5, buffer, length);
295 MD5Final(&m_md5);
296
297 for (i = 0; i < 16; i++) sprintf(checksum+i*2,"%02X", m_md5.digest[i]);
298}