source: rtems/cpukit/pppd/md5.c @ 7452b855

4.104.114.84.95
Last change on this file since 7452b855 was 2129ac8, checked in by Ralf Corsepius <ralf.corsepius@…>, on 08/14/02 at 10:44:49

2002-08-14 Ralf Corsepius <corsepiu@…>

  • rtems_servers/ftpd.c: Remove unused variable buf.
  • pppd/md5.c: #include <string.h> to make gcc31 happy.
  • rtems_telnetd/telnetd.c: #include <string.h> to make gcc31 happy.
  • rtems_webserver/webmain.c: Remove unused variable dir, cp.
  • Property mode set to 100644
File size: 11.3 KB
Line 
1
2
3/*
4 ***********************************************************************
5 ** md5.c -- the source code for MD5 routines                         **
6 ** RSA Data Security, Inc. MD5 Message-Digest Algorithm              **
7 ** Created: 2/17/90 RLR                                              **
8 ** Revised: 1/91 SRD,AJ,BSK,JT Reference C ver., 7/10 constant corr. **
9 ***********************************************************************
10 */
11
12/*
13 ***********************************************************************
14 ** Copyright (C) 1990, RSA Data Security, Inc. All rights reserved.  **
15 **                                                                   **
16 ** License to copy and use this software is granted provided that    **
17 ** it is identified as the "RSA Data Security, Inc. MD5 Message-     **
18 ** Digest Algorithm" in all material mentioning or referencing this  **
19 ** software or this function.                                        **
20 **                                                                   **
21 ** License is also granted to make and use derivative works          **
22 ** provided that such works are identified as "derived from the RSA  **
23 ** Data Security, Inc. MD5 Message-Digest Algorithm" in all          **
24 ** material mentioning or referencing the derived work.              **
25 **                                                                   **
26 ** RSA Data Security, Inc. makes no representations concerning       **
27 ** either the merchantability of this software or the suitability    **
28 ** of this software for any particular purpose.  It is provided "as  **
29 ** is" without express or implied warranty of any kind.              **
30 **                                                                   **
31 ** These notices must be retained in any copies of any part of this  **
32 ** documentation and/or software.                                    **
33 ***********************************************************************
34 */
35
36#include <string.h>     /* memcpy */
37
38#include "md5.h"
39
40/*
41 ***********************************************************************
42 **  Message-digest routines:                                         **
43 **  To form the message digest for a message M                       **
44 **    (1) Initialize a context buffer mdContext using MD5Init        **
45 **    (2) Call MD5Update on mdContext and M                          **
46 **    (3) Call MD5Final on mdContext                                 **
47 **  The message digest is now in mdContext->digest[0...15]           **
48 ***********************************************************************
49 */
50
51/* forward declaration */
52static void Transform ();
53
54static unsigned char PADDING[64] = {
55  0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
56  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
57  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
58  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
59  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
60  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
61  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
62  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
63};
64
65/* F, G, H and I are basic MD5 functions */
66#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
67#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
68#define H(x, y, z) ((x) ^ (y) ^ (z))
69#define I(x, y, z) ((y) ^ ((x) | (~z)))
70
71/* ROTATE_LEFT rotates x left n bits */
72#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
73
74/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4 */
75/* Rotation is separate from addition to prevent recomputation */
76#define FF(a, b, c, d, x, s, ac) \
77  {(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
78   (a) = ROTATE_LEFT ((a), (s)); \
79   (a) += (b); \
80  }
81#define GG(a, b, c, d, x, s, ac) \
82  {(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
83   (a) = ROTATE_LEFT ((a), (s)); \
84   (a) += (b); \
85  }
86#define HH(a, b, c, d, x, s, ac) \
87  {(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
88   (a) = ROTATE_LEFT ((a), (s)); \
89   (a) += (b); \
90  }
91#define II(a, b, c, d, x, s, ac) \
92  {(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
93   (a) = ROTATE_LEFT ((a), (s)); \
94   (a) += (b); \
95  }
96
97#ifdef __STDC__
98#define UL(x)   x##U
99#else
100#define UL(x)   x
101#endif
102
103/* The routine MD5Init initializes the message-digest context
104   mdContext. All fields are set to zero.
105 */
106void MD5Init (mdContext)
107MD5_CTX *mdContext;
108{
109  mdContext->i[0] = mdContext->i[1] = (UINT4)0;
110
111  /* Load magic initialization constants.
112   */
113  mdContext->buf[0] = (UINT4)0x67452301;
114  mdContext->buf[1] = (UINT4)0xefcdab89;
115  mdContext->buf[2] = (UINT4)0x98badcfe;
116  mdContext->buf[3] = (UINT4)0x10325476;
117}
118
119/* The routine MD5Update updates the message-digest context to
120   account for the presence of each of the characters inBuf[0..inLen-1]
121   in the message whose digest is being computed.
122 */
123void MD5Update (mdContext, inBuf, inLen)
124MD5_CTX *mdContext;
125unsigned char *inBuf;
126unsigned int inLen;
127{
128  UINT4 in[16];
129  int mdi;
130  unsigned int i, ii;
131
132  /* compute number of bytes mod 64 */
133  mdi = (int)((mdContext->i[0] >> 3) & 0x3F);
134
135  /* update number of bits */
136  if ((mdContext->i[0] + ((UINT4)inLen << 3)) < mdContext->i[0])
137    mdContext->i[1]++;
138  mdContext->i[0] += ((UINT4)inLen << 3);
139  mdContext->i[1] += ((UINT4)inLen >> 29);
140
141  while (inLen--) {
142    /* add new character to buffer, increment mdi */
143    mdContext->in[mdi++] = *inBuf++;
144
145    /* transform if necessary */
146    if (mdi == 0x40) {
147      for (i = 0, ii = 0; i < 16; i++, ii += 4)
148        in[i] = (((UINT4)mdContext->in[ii+3]) << 24) |
149                (((UINT4)mdContext->in[ii+2]) << 16) |
150                (((UINT4)mdContext->in[ii+1]) << 8) |
151                ((UINT4)mdContext->in[ii]);
152      Transform (mdContext->buf, in);
153      mdi = 0;
154    }
155  }
156}
157
158/* The routine MD5Final terminates the message-digest computation and
159   ends with the desired message digest in mdContext->digest[0...15].
160 */
161void MD5Final (hash, mdContext)
162unsigned char hash[];
163MD5_CTX *mdContext;
164{
165  UINT4 in[16];
166  int mdi;
167  unsigned int i, ii;
168  unsigned int padLen;
169
170  /* save number of bits */
171  in[14] = mdContext->i[0];
172  in[15] = mdContext->i[1];
173
174  /* compute number of bytes mod 64 */
175  mdi = (int)((mdContext->i[0] >> 3) & 0x3F);
176
177  /* pad out to 56 mod 64 */
178  padLen = (mdi < 56) ? (56 - mdi) : (120 - mdi);
179  MD5Update (mdContext, PADDING, padLen);
180
181  /* append length in bits and transform */
182  for (i = 0, ii = 0; i < 14; i++, ii += 4)
183    in[i] = (((UINT4)mdContext->in[ii+3]) << 24) |
184            (((UINT4)mdContext->in[ii+2]) << 16) |
185            (((UINT4)mdContext->in[ii+1]) << 8) |
186            ((UINT4)mdContext->in[ii]);
187  Transform (mdContext->buf, in);
188
189  /* store buffer in digest */
190  for (i = 0, ii = 0; i < 4; i++, ii += 4) {
191    mdContext->digest[ii] = (unsigned char)(mdContext->buf[i] & 0xFF);
192    mdContext->digest[ii+1] =
193      (unsigned char)((mdContext->buf[i] >> 8) & 0xFF);
194    mdContext->digest[ii+2] =
195      (unsigned char)((mdContext->buf[i] >> 16) & 0xFF);
196    mdContext->digest[ii+3] =
197      (unsigned char)((mdContext->buf[i] >> 24) & 0xFF);
198  }
199  memcpy(hash, mdContext->digest, 16);
200}
201
202/* Basic MD5 step. Transforms buf based on in.
203 */
204static void Transform (buf, in)
205UINT4 *buf;
206UINT4 *in;
207{
208  UINT4 a = buf[0], b = buf[1], c = buf[2], d = buf[3];
209
210  /* Round 1 */
211#define S11 7
212#define S12 12
213#define S13 17
214#define S14 22
215  FF ( a, b, c, d, in[ 0], S11, UL(3614090360)); /* 1 */
216  FF ( d, a, b, c, in[ 1], S12, UL(3905402710)); /* 2 */
217  FF ( c, d, a, b, in[ 2], S13, UL( 606105819)); /* 3 */
218  FF ( b, c, d, a, in[ 3], S14, UL(3250441966)); /* 4 */
219  FF ( a, b, c, d, in[ 4], S11, UL(4118548399)); /* 5 */
220  FF ( d, a, b, c, in[ 5], S12, UL(1200080426)); /* 6 */
221  FF ( c, d, a, b, in[ 6], S13, UL(2821735955)); /* 7 */
222  FF ( b, c, d, a, in[ 7], S14, UL(4249261313)); /* 8 */
223  FF ( a, b, c, d, in[ 8], S11, UL(1770035416)); /* 9 */
224  FF ( d, a, b, c, in[ 9], S12, UL(2336552879)); /* 10 */
225  FF ( c, d, a, b, in[10], S13, UL(4294925233)); /* 11 */
226  FF ( b, c, d, a, in[11], S14, UL(2304563134)); /* 12 */
227  FF ( a, b, c, d, in[12], S11, UL(1804603682)); /* 13 */
228  FF ( d, a, b, c, in[13], S12, UL(4254626195)); /* 14 */
229  FF ( c, d, a, b, in[14], S13, UL(2792965006)); /* 15 */
230  FF ( b, c, d, a, in[15], S14, UL(1236535329)); /* 16 */
231
232  /* Round 2 */
233#define S21 5
234#define S22 9
235#define S23 14
236#define S24 20
237  GG ( a, b, c, d, in[ 1], S21, UL(4129170786)); /* 17 */
238  GG ( d, a, b, c, in[ 6], S22, UL(3225465664)); /* 18 */
239  GG ( c, d, a, b, in[11], S23, UL( 643717713)); /* 19 */
240  GG ( b, c, d, a, in[ 0], S24, UL(3921069994)); /* 20 */
241  GG ( a, b, c, d, in[ 5], S21, UL(3593408605)); /* 21 */
242  GG ( d, a, b, c, in[10], S22, UL(  38016083)); /* 22 */
243  GG ( c, d, a, b, in[15], S23, UL(3634488961)); /* 23 */
244  GG ( b, c, d, a, in[ 4], S24, UL(3889429448)); /* 24 */
245  GG ( a, b, c, d, in[ 9], S21, UL( 568446438)); /* 25 */
246  GG ( d, a, b, c, in[14], S22, UL(3275163606)); /* 26 */
247  GG ( c, d, a, b, in[ 3], S23, UL(4107603335)); /* 27 */
248  GG ( b, c, d, a, in[ 8], S24, UL(1163531501)); /* 28 */
249  GG ( a, b, c, d, in[13], S21, UL(2850285829)); /* 29 */
250  GG ( d, a, b, c, in[ 2], S22, UL(4243563512)); /* 30 */
251  GG ( c, d, a, b, in[ 7], S23, UL(1735328473)); /* 31 */
252  GG ( b, c, d, a, in[12], S24, UL(2368359562)); /* 32 */
253
254  /* Round 3 */
255#define S31 4
256#define S32 11
257#define S33 16
258#define S34 23
259  HH ( a, b, c, d, in[ 5], S31, UL(4294588738)); /* 33 */
260  HH ( d, a, b, c, in[ 8], S32, UL(2272392833)); /* 34 */
261  HH ( c, d, a, b, in[11], S33, UL(1839030562)); /* 35 */
262  HH ( b, c, d, a, in[14], S34, UL(4259657740)); /* 36 */
263  HH ( a, b, c, d, in[ 1], S31, UL(2763975236)); /* 37 */
264  HH ( d, a, b, c, in[ 4], S32, UL(1272893353)); /* 38 */
265  HH ( c, d, a, b, in[ 7], S33, UL(4139469664)); /* 39 */
266  HH ( b, c, d, a, in[10], S34, UL(3200236656)); /* 40 */
267  HH ( a, b, c, d, in[13], S31, UL( 681279174)); /* 41 */
268  HH ( d, a, b, c, in[ 0], S32, UL(3936430074)); /* 42 */
269  HH ( c, d, a, b, in[ 3], S33, UL(3572445317)); /* 43 */
270  HH ( b, c, d, a, in[ 6], S34, UL(  76029189)); /* 44 */
271  HH ( a, b, c, d, in[ 9], S31, UL(3654602809)); /* 45 */
272  HH ( d, a, b, c, in[12], S32, UL(3873151461)); /* 46 */
273  HH ( c, d, a, b, in[15], S33, UL( 530742520)); /* 47 */
274  HH ( b, c, d, a, in[ 2], S34, UL(3299628645)); /* 48 */
275
276  /* Round 4 */
277#define S41 6
278#define S42 10
279#define S43 15
280#define S44 21
281  II ( a, b, c, d, in[ 0], S41, UL(4096336452)); /* 49 */
282  II ( d, a, b, c, in[ 7], S42, UL(1126891415)); /* 50 */
283  II ( c, d, a, b, in[14], S43, UL(2878612391)); /* 51 */
284  II ( b, c, d, a, in[ 5], S44, UL(4237533241)); /* 52 */
285  II ( a, b, c, d, in[12], S41, UL(1700485571)); /* 53 */
286  II ( d, a, b, c, in[ 3], S42, UL(2399980690)); /* 54 */
287  II ( c, d, a, b, in[10], S43, UL(4293915773)); /* 55 */
288  II ( b, c, d, a, in[ 1], S44, UL(2240044497)); /* 56 */
289  II ( a, b, c, d, in[ 8], S41, UL(1873313359)); /* 57 */
290  II ( d, a, b, c, in[15], S42, UL(4264355552)); /* 58 */
291  II ( c, d, a, b, in[ 6], S43, UL(2734768916)); /* 59 */
292  II ( b, c, d, a, in[13], S44, UL(1309151649)); /* 60 */
293  II ( a, b, c, d, in[ 4], S41, UL(4149444226)); /* 61 */
294  II ( d, a, b, c, in[11], S42, UL(3174756917)); /* 62 */
295  II ( c, d, a, b, in[ 2], S43, UL( 718787259)); /* 63 */
296  II ( b, c, d, a, in[ 9], S44, UL(3951481745)); /* 64 */
297
298  buf[0] += a;
299  buf[1] += b;
300  buf[2] += c;
301  buf[3] += d;
302}
303
304/*
305 ***********************************************************************
306 ** End of md5.c                                                      **
307 ******************************** (cut) ********************************
308 */
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