Change the kernel dev_t, representing a pointer to a specinfo structure,
[dragonfly.git] / contrib / bind-9.2.4rc7 / lib / bind / dst / md5_dgst.c
1 /* crypto/md/md5_dgst.c */
2 /* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com)
3  * All rights reserved.
4  *
5  * This package is an SSL implementation written
6  * by Eric Young (eay@cryptsoft.com).
7  * The implementation was written so as to conform with Netscapes SSL.
8  * 
9  * This library is free for commercial and non-commercial use as long as
10  * the following conditions are aheared to.  The following conditions
11  * apply to all code found in this distribution, be it the RC4, RSA,
12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
13  * included with this distribution is covered by the same copyright terms
14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15  * 
16  * Copyright remains Eric Young's, and as such any Copyright notices in
17  * the code are not to be removed.
18  * If this package is used in a product, Eric Young should be given attribution
19  * as the author of the parts of the library used.
20  * This can be in the form of a textual message at program startup or
21  * in documentation (online or textual) provided with the package.
22  * 
23  * Redistribution and use in source and binary forms, with or without
24  * modification, are permitted provided that the following conditions
25  * are met:
26  * 1. Redistributions of source code must retain the copyright
27  *    notice, this list of conditions and the following disclaimer.
28  * 2. Redistributions in binary form must reproduce the above copyright
29  *    notice, this list of conditions and the following disclaimer in the
30  *    documentation and/or other materials provided with the distribution.
31  * 3. All advertising materials mentioning features or use of this software
32  *    must display the following acknowledgement:
33  *    "This product includes cryptographic software written by
34  *     Eric Young (eay@cryptsoft.com)"
35  *    The word 'cryptographic' can be left out if the rouines from the library
36  *    being used are not cryptographic related :-).
37  * 4. If you include any Windows specific code (or a derivative thereof) from 
38  *    the apps directory (application code) you must include an acknowledgement:
39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40  * 
41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51  * SUCH DAMAGE.
52  * 
53  * The licence and distribution terms for any publically available version or
54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
55  * copied and put under another distribution licence
56  * [including the GNU Public Licence.]
57  */
58
59 #ifdef USE_MD5 /* Added by ogud@tis.com 1998/1/26 */
60 #include <port_before.h>
61 #include <stdio.h>
62 #include "md5_locl.h"
63 #include <port_after.h>
64
65 const char *MD5_version="MD5 part of SSLeay 0.8.1 19-Jul-1997";
66
67 /* Implemented from RFC1321 The MD5 Message-Digest Algorithm
68  */
69
70 #define INIT_DATA_A (unsigned long)0x67452301L
71 #define INIT_DATA_B (unsigned long)0xefcdab89L
72 #define INIT_DATA_C (unsigned long)0x98badcfeL
73 #define INIT_DATA_D (unsigned long)0x10325476L
74
75 #ifndef NOPROTO
76 static void md5_block(MD5_CTX *c, unsigned long *p);
77 #else
78 static void md5_block();
79 #endif
80
81 void MD5_Init(c)
82 MD5_CTX *c;
83         {
84         c->A=INIT_DATA_A;
85         c->B=INIT_DATA_B;
86         c->C=INIT_DATA_C;
87         c->D=INIT_DATA_D;
88         c->Nl=0;
89         c->Nh=0;
90         c->num=0;
91         }
92
93 void MD5_Update(c, data, len)
94 MD5_CTX *c;
95 register const unsigned char *data;
96 unsigned long len;
97         {
98         register ULONG *p;
99         int sw,sc;
100         ULONG l;
101
102         if (len == 0U) return;
103
104         l=(c->Nl+(len<<3))&0xffffffffL;
105         /* 95-05-24 eay Fixed a bug with the overflow handling, thanks to
106          * Wei Dai <weidai@eskimo.com> for pointing it out. */
107         if (l < c->Nl) /* overflow */
108                 c->Nh++;
109         c->Nh+=(len>>29);
110         c->Nl=l;
111
112         if (c->num != 0)
113                 {
114                 p=c->data;
115                 sw=c->num>>2;
116                 sc=c->num&0x03;
117
118                 if ((c->num+len) >= (size_t)MD5_CBLOCK)
119                         {
120                         l= p[sw];
121                         p_c2l(data,l,sc);
122                         p[sw++]=l;
123                         for (; sw<MD5_LBLOCK; sw++)
124                                 {
125                                 c2l(data,l);
126                                 p[sw]=l;
127                                 }
128                         len-=(MD5_CBLOCK-c->num);
129
130                         md5_block(c,p);
131                         c->num=0;
132                         /* drop through and do the rest */
133                         }
134                 else
135                         {
136                         int ew,ec;
137
138                         c->num+=(int)len;
139                         if ((sc+len) < 4U) /* ugly, add char's to a word */
140                                 {
141                                 l= p[sw];
142                                 p_c2l_p(data,l,sc,len);
143                                 p[sw]=l;
144                                 }
145                         else
146                                 {
147                                 ew=(c->num>>2);
148                                 ec=(c->num&0x03);
149                                 l= p[sw];
150                                 p_c2l(data,l,sc);
151                                 p[sw++]=l;
152                                 for (; sw < ew; sw++)
153                                         { c2l(data,l); p[sw]=l; }
154                                 if (ec)
155                                         {
156                                         c2l_p(data,l,ec);
157                                         p[sw]=l;
158                                         }
159                                 }
160                         return;
161                         }
162                 }
163         /* we now can process the input data in blocks of MD5_CBLOCK
164          * chars and save the leftovers to c->data. */
165         p=c->data;
166         while (len >= (size_t)MD5_CBLOCK)
167                 {
168 #if defined(L_ENDIAN) || defined(B_ENDIAN)
169                 memcpy(p,data,MD5_CBLOCK);
170                 data+=MD5_CBLOCK;
171 #ifdef B_ENDIAN
172                 for (sw=(MD5_LBLOCK/4); sw; sw--)
173                         {
174                         Endian_Reverse32(p[0]);
175                         Endian_Reverse32(p[1]);
176                         Endian_Reverse32(p[2]);
177                         Endian_Reverse32(p[3]);
178                         p+=4;
179                         }
180 #endif
181 #else
182                 for (sw=(MD5_LBLOCK/4); sw; sw--)
183                         {
184                         c2l(data,l); *(p++)=l;
185                         c2l(data,l); *(p++)=l;
186                         c2l(data,l); *(p++)=l;
187                         c2l(data,l); *(p++)=l; 
188                         } 
189 #endif
190                 p=c->data;
191                 md5_block(c,p);
192                 len-=MD5_CBLOCK;
193                 }
194         sc=(int)len;
195         c->num=sc;
196         if (sc)
197                 {
198                 sw=sc>>2;       /* words to copy */
199 #ifdef L_ENDIAN
200                 p[sw]=0;
201                 memcpy(p,data,sc);
202 #else
203                 sc&=0x03;
204                 for ( ; sw; sw--)
205                         { c2l(data,l); *(p++)=l; }
206                 c2l_p(data,l,sc);
207                 *p=l;
208 #endif
209                 }
210         }
211
212 static void md5_block(c, X)
213 MD5_CTX *c;
214 register ULONG *X;
215         {
216         register ULONG A,B,C,D;
217
218         A=c->A;
219         B=c->B;
220         C=c->C;
221         D=c->D;
222
223         /* Round 0 */
224         R0(A,B,C,D,X[ 0], 7,0xd76aa478L);
225         R0(D,A,B,C,X[ 1],12,0xe8c7b756L);
226         R0(C,D,A,B,X[ 2],17,0x242070dbL);
227         R0(B,C,D,A,X[ 3],22,0xc1bdceeeL);
228         R0(A,B,C,D,X[ 4], 7,0xf57c0fafL);
229         R0(D,A,B,C,X[ 5],12,0x4787c62aL);
230         R0(C,D,A,B,X[ 6],17,0xa8304613L);
231         R0(B,C,D,A,X[ 7],22,0xfd469501L);
232         R0(A,B,C,D,X[ 8], 7,0x698098d8L);
233         R0(D,A,B,C,X[ 9],12,0x8b44f7afL);
234         R0(C,D,A,B,X[10],17,0xffff5bb1L);
235         R0(B,C,D,A,X[11],22,0x895cd7beL);
236         R0(A,B,C,D,X[12], 7,0x6b901122L);
237         R0(D,A,B,C,X[13],12,0xfd987193L);
238         R0(C,D,A,B,X[14],17,0xa679438eL);
239         R0(B,C,D,A,X[15],22,0x49b40821L);
240         /* Round 1 */
241         R1(A,B,C,D,X[ 1], 5,0xf61e2562L);
242         R1(D,A,B,C,X[ 6], 9,0xc040b340L);
243         R1(C,D,A,B,X[11],14,0x265e5a51L);
244         R1(B,C,D,A,X[ 0],20,0xe9b6c7aaL);
245         R1(A,B,C,D,X[ 5], 5,0xd62f105dL);
246         R1(D,A,B,C,X[10], 9,0x02441453L);
247         R1(C,D,A,B,X[15],14,0xd8a1e681L);
248         R1(B,C,D,A,X[ 4],20,0xe7d3fbc8L);
249         R1(A,B,C,D,X[ 9], 5,0x21e1cde6L);
250         R1(D,A,B,C,X[14], 9,0xc33707d6L);
251         R1(C,D,A,B,X[ 3],14,0xf4d50d87L);
252         R1(B,C,D,A,X[ 8],20,0x455a14edL);
253         R1(A,B,C,D,X[13], 5,0xa9e3e905L);
254         R1(D,A,B,C,X[ 2], 9,0xfcefa3f8L);
255         R1(C,D,A,B,X[ 7],14,0x676f02d9L);
256         R1(B,C,D,A,X[12],20,0x8d2a4c8aL);
257         /* Round 2 */
258         R2(A,B,C,D,X[ 5], 4,0xfffa3942L);
259         R2(D,A,B,C,X[ 8],11,0x8771f681L);
260         R2(C,D,A,B,X[11],16,0x6d9d6122L);
261         R2(B,C,D,A,X[14],23,0xfde5380cL);
262         R2(A,B,C,D,X[ 1], 4,0xa4beea44L);
263         R2(D,A,B,C,X[ 4],11,0x4bdecfa9L);
264         R2(C,D,A,B,X[ 7],16,0xf6bb4b60L);
265         R2(B,C,D,A,X[10],23,0xbebfbc70L);
266         R2(A,B,C,D,X[13], 4,0x289b7ec6L);
267         R2(D,A,B,C,X[ 0],11,0xeaa127faL);
268         R2(C,D,A,B,X[ 3],16,0xd4ef3085L);
269         R2(B,C,D,A,X[ 6],23,0x04881d05L);
270         R2(A,B,C,D,X[ 9], 4,0xd9d4d039L);
271         R2(D,A,B,C,X[12],11,0xe6db99e5L);
272         R2(C,D,A,B,X[15],16,0x1fa27cf8L);
273         R2(B,C,D,A,X[ 2],23,0xc4ac5665L);
274         /* Round 3 */
275         R3(A,B,C,D,X[ 0], 6,0xf4292244L);
276         R3(D,A,B,C,X[ 7],10,0x432aff97L);
277         R3(C,D,A,B,X[14],15,0xab9423a7L);
278         R3(B,C,D,A,X[ 5],21,0xfc93a039L);
279         R3(A,B,C,D,X[12], 6,0x655b59c3L);
280         R3(D,A,B,C,X[ 3],10,0x8f0ccc92L);
281         R3(C,D,A,B,X[10],15,0xffeff47dL);
282         R3(B,C,D,A,X[ 1],21,0x85845dd1L);
283         R3(A,B,C,D,X[ 8], 6,0x6fa87e4fL);
284         R3(D,A,B,C,X[15],10,0xfe2ce6e0L);
285         R3(C,D,A,B,X[ 6],15,0xa3014314L);
286         R3(B,C,D,A,X[13],21,0x4e0811a1L);
287         R3(A,B,C,D,X[ 4], 6,0xf7537e82L);
288         R3(D,A,B,C,X[11],10,0xbd3af235L);
289         R3(C,D,A,B,X[ 2],15,0x2ad7d2bbL);
290         R3(B,C,D,A,X[ 9],21,0xeb86d391L);
291
292         c->A+=A&0xffffffffL;
293         c->B+=B&0xffffffffL;
294         c->C+=C&0xffffffffL;
295         c->D+=D&0xffffffffL;
296         }
297
298 void MD5_Final(md, c)
299 unsigned char *md;
300 MD5_CTX *c;
301         {
302         register int i,j;
303         register ULONG l;
304         register ULONG *p;
305         static unsigned char end[4]={0x80,0x00,0x00,0x00};
306         unsigned char *cp=end;
307
308         /* c->num should definitly have room for at least one more byte. */
309         p=c->data;
310         j=c->num;
311         i=j>>2;
312
313         /* purify often complains about the following line as an
314          * Uninitialized Memory Read.  While this can be true, the
315          * following p_c2l macro will reset l when that case is true.
316          * This is because j&0x03 contains the number of 'valid' bytes
317          * already in p[i].  If and only if j&0x03 == 0, the UMR will
318          * occur but this is also the only time p_c2l will do
319          * l= *(cp++) instead of l|= *(cp++)
320          * Many thanks to Alex Tang <altitude@cic.net> for pickup this
321          * 'potential bug' */
322 #ifdef PURIFY
323         if ((j&0x03) == 0) p[i]=0;
324 #endif
325         l=p[i];
326         p_c2l(cp,l,j&0x03);
327         p[i]=l;
328         i++;
329         /* i is the next 'undefined word' */
330         if (c->num >= MD5_LAST_BLOCK)
331                 {
332                 for (; i<MD5_LBLOCK; i++)
333                         p[i]=0;
334                 md5_block(c,p);
335                 i=0;
336                 }
337         for (; i<(MD5_LBLOCK-2); i++)
338                 p[i]=0;
339         p[MD5_LBLOCK-2]=c->Nl;
340         p[MD5_LBLOCK-1]=c->Nh;
341         md5_block(c,p);
342         cp=md;
343         l=c->A; l2c(l,cp);
344         l=c->B; l2c(l,cp);
345         l=c->C; l2c(l,cp);
346         l=c->D; l2c(l,cp);
347
348         /* clear stuff, md5_block may be leaving some stuff on the stack
349          * but I'm not worried :-) */
350         c->num=0;
351 /*      memset((char *)&c,0,sizeof(c));*/
352         }
353
354 #ifdef undef
355 int printit(l)
356 unsigned long *l;
357         {
358         int i,ii;
359
360         for (i=0; i<2; i++)
361                 {
362                 for (ii=0; ii<8; ii++)
363                         {
364                         fprintf(stderr,"%08lx ",l[i*8+ii]);
365                         }
366                 fprintf(stderr,"\n");
367                 }
368         }
369 #endif
370 #endif /* USE_MD5 */