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1 /* crypto/sha/sha_dgst.c */
2 /* Copyright (C) 1995-1998 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 #include <sys/cdefs.h>
60 __FBSDID("$FreeBSD$");
61
62 #include <sys/types.h>
63
64 #include <stdio.h>
65 #include <string.h>
66
67 #if 0
68 #include <machine/ansi.h>       /* we use the __ variants of bit-sized types */
69 #endif
70 #include <machine/endian.h>
71
72 #define  SHA_0
73 #undef SHA_1
74 #include "sha.h"
75 #include "sha_locl.h"
76
77 char *SHA_version="SHA part of SSLeay 0.9.0b 11-Oct-1998";
78
79 /* Implemented from SHA-0 document - The Secure Hash Algorithm
80  */
81
82 #define INIT_DATA_h0 (unsigned long)0x67452301L
83 #define INIT_DATA_h1 (unsigned long)0xefcdab89L
84 #define INIT_DATA_h2 (unsigned long)0x98badcfeL
85 #define INIT_DATA_h3 (unsigned long)0x10325476L
86 #define INIT_DATA_h4 (unsigned long)0xc3d2e1f0L
87
88 #define K_00_19 0x5a827999L
89 #define K_20_39 0x6ed9eba1L
90 #define K_40_59 0x8f1bbcdcL
91 #define K_60_79 0xca62c1d6L
92
93 #ifndef NOPROTO
94    void sha_block(SHA_CTX *c, const u_int32_t *p, int num);
95 #else
96    void sha_block();
97 #endif
98
99 #define M_c2nl          c2nl
100 #define M_p_c2nl        p_c2nl
101 #define M_c2nl_p        c2nl_p
102 #define M_p_c2nl_p      p_c2nl_p
103 #define M_nl2c          nl2c
104
105 void SHA_Init(c)
106 SHA_CTX *c;
107         {
108         c->h0=INIT_DATA_h0;
109         c->h1=INIT_DATA_h1;
110         c->h2=INIT_DATA_h2;
111         c->h3=INIT_DATA_h3;
112         c->h4=INIT_DATA_h4;
113         c->Nl=0;
114         c->Nh=0;
115         c->num=0;
116         }
117
118 void SHA_Update(c, in, len)
119 SHA_CTX *c;
120 const void *in;
121 size_t len;
122         {
123         u_int32_t *p;
124         int ew,ec,sw,sc;
125         u_int32_t l;
126         const unsigned char *data = in;
127
128         if (len == 0) return;
129
130         l=(c->Nl+(len<<3))&0xffffffffL;
131         if (l < c->Nl) /* overflow */
132                 c->Nh++;
133         c->Nh+=(len>>29);
134         c->Nl=l;
135
136         if (c->num != 0)
137                 {
138                 p=c->data;
139                 sw=c->num>>2;
140                 sc=c->num&0x03;
141
142                 if ((c->num+len) >= SHA_CBLOCK)
143                         {
144                         l= p[sw];
145                         M_p_c2nl(data,l,sc);
146                         p[sw++]=l;
147                         for (; sw<SHA_LBLOCK; sw++)
148                                 {
149                                 M_c2nl(data,l);
150                                 p[sw]=l;
151                                 }
152                         len-=(SHA_CBLOCK-c->num);
153
154                         sha_block(c,p,64);
155                         c->num=0;
156                         /* drop through and do the rest */
157                         }
158                 else
159                         {
160                         c->num+=(int)len;
161                         if ((sc+len) < 4) /* ugly, add char's to a word */
162                                 {
163                                 l= p[sw];
164                                 M_p_c2nl_p(data,l,sc,len);
165                                 p[sw]=l;
166                                 }
167                         else
168                                 {
169                                 ew=(c->num>>2);
170                                 ec=(c->num&0x03);
171                                 l= p[sw];
172                                 M_p_c2nl(data,l,sc);
173                                 p[sw++]=l;
174                                 for (; sw < ew; sw++)
175                                         { M_c2nl(data,l); p[sw]=l; }
176                                 if (ec)
177                                         {
178                                         M_c2nl_p(data,l,ec);
179                                         p[sw]=l;
180                                         }
181                                 }
182                         return;
183                         }
184                 }
185         /* We can only do the following code for assember, the reason
186          * being that the sha_block 'C' version changes the values
187          * in the 'data' array.  The assember code avoids this and
188          * copies it to a local array.  I should be able to do this for
189          * the C version as well....
190          */
191 #if 1
192 #if BYTE_ORDER == BIG_ENDIAN || defined(SHA_ASM)
193         if ((((unsigned int)data)%sizeof(u_int32_t)) == 0)
194                 {
195                 sw=len/SHA_CBLOCK;
196                 if (sw)
197                         {
198                         sw*=SHA_CBLOCK;
199                         sha_block(c,(u_int32_t *)data,sw);
200                         data+=sw;
201                         len-=sw;
202                         }
203                 }
204 #endif
205 #endif
206         /* we now can process the input data in blocks of SHA_CBLOCK
207          * chars and save the leftovers to c->data. */
208         p=c->data;
209         while (len >= SHA_CBLOCK)
210                 {
211 #if BYTE_ORDER == BIG_ENDIAN || BYTE_ORDER == LITTLE_ENDIAN
212                 if (p != (u_int32_t *)data)
213                         memcpy(p,data,SHA_CBLOCK);
214                 data+=SHA_CBLOCK;
215 #  if BYTE_ORDER == LITTLE_ENDIAN
216 #    ifndef SHA_ASM /* Will not happen */
217                 for (sw=(SHA_LBLOCK/4); sw; sw--)
218                         {
219                         Endian_Reverse32(p[0]);
220                         Endian_Reverse32(p[1]);
221                         Endian_Reverse32(p[2]);
222                         Endian_Reverse32(p[3]);
223                         p+=4;
224                         }
225                 p=c->data;
226 #    endif
227 #  endif
228 #else
229                 for (sw=(SHA_BLOCK/4); sw; sw--)
230                         {
231                         M_c2nl(data,l); *(p++)=l;
232                         M_c2nl(data,l); *(p++)=l;
233                         M_c2nl(data,l); *(p++)=l;
234                         M_c2nl(data,l); *(p++)=l;
235                         }
236                 p=c->data;
237 #endif
238                 sha_block(c,p,64);
239                 len-=SHA_CBLOCK;
240                 }
241         ec=(int)len;
242         c->num=ec;
243         ew=(ec>>2);
244         ec&=0x03;
245
246         for (sw=0; sw < ew; sw++)
247                 { M_c2nl(data,l); p[sw]=l; }
248         M_c2nl_p(data,l,ec);
249         p[sw]=l;
250         }
251
252 void SHA_Transform(c,b)
253 SHA_CTX *c;
254 unsigned char *b;
255         {
256         u_int32_t p[16];
257 #if BYTE_ORDER == LITTLE_ENDIAN
258         u_int32_t *q;
259         int i;
260 #endif
261
262 #if BYTE_ORDER == BIG_ENDIAN || BYTE_ORDER == LITTLE_ENDIAN
263         memcpy(p,b,64);
264 #if BYTE_ORDER == LITTLE_ENDIAN
265         q=p;
266         for (i=(SHA_LBLOCK/4); i; i--)
267                 {
268                 Endian_Reverse32(q[0]);
269                 Endian_Reverse32(q[1]);
270                 Endian_Reverse32(q[2]);
271                 Endian_Reverse32(q[3]);
272                 q+=4;
273                 }
274 #endif
275 #else
276         q=p;
277         for (i=(SHA_LBLOCK/4); i; i--)
278                 {
279                 u_int32_t l;
280                 c2nl(b,l); *(q++)=l;
281                 c2nl(b,l); *(q++)=l;
282                 c2nl(b,l); *(q++)=l;
283                 c2nl(b,l); *(q++)=l; 
284                 } 
285 #endif
286         sha_block(c,p,64);
287         }
288
289 void sha_block(c, W, num)
290 SHA_CTX *c;
291 const u_int32_t *W;
292 int num;
293         {
294         u_int32_t A,B,C,D,E,T;
295         u_int32_t X[16];
296
297         A=c->h0;
298         B=c->h1;
299         C=c->h2;
300         D=c->h3;
301         E=c->h4;
302
303         for (;;)
304                 {
305         BODY_00_15( 0,A,B,C,D,E,T,W);
306         BODY_00_15( 1,T,A,B,C,D,E,W);
307         BODY_00_15( 2,E,T,A,B,C,D,W);
308         BODY_00_15( 3,D,E,T,A,B,C,W);
309         BODY_00_15( 4,C,D,E,T,A,B,W);
310         BODY_00_15( 5,B,C,D,E,T,A,W);
311         BODY_00_15( 6,A,B,C,D,E,T,W);
312         BODY_00_15( 7,T,A,B,C,D,E,W);
313         BODY_00_15( 8,E,T,A,B,C,D,W);
314         BODY_00_15( 9,D,E,T,A,B,C,W);
315         BODY_00_15(10,C,D,E,T,A,B,W);
316         BODY_00_15(11,B,C,D,E,T,A,W);
317         BODY_00_15(12,A,B,C,D,E,T,W);
318         BODY_00_15(13,T,A,B,C,D,E,W);
319         BODY_00_15(14,E,T,A,B,C,D,W);
320         BODY_00_15(15,D,E,T,A,B,C,W);
321         BODY_16_19(16,C,D,E,T,A,B,W,W,W,W);
322         BODY_16_19(17,B,C,D,E,T,A,W,W,W,W);
323         BODY_16_19(18,A,B,C,D,E,T,W,W,W,W);
324         BODY_16_19(19,T,A,B,C,D,E,W,W,W,X);
325
326         BODY_20_31(20,E,T,A,B,C,D,W,W,W,X);
327         BODY_20_31(21,D,E,T,A,B,C,W,W,W,X);
328         BODY_20_31(22,C,D,E,T,A,B,W,W,W,X);
329         BODY_20_31(23,B,C,D,E,T,A,W,W,W,X);
330         BODY_20_31(24,A,B,C,D,E,T,W,W,X,X);
331         BODY_20_31(25,T,A,B,C,D,E,W,W,X,X);
332         BODY_20_31(26,E,T,A,B,C,D,W,W,X,X);
333         BODY_20_31(27,D,E,T,A,B,C,W,W,X,X);
334         BODY_20_31(28,C,D,E,T,A,B,W,W,X,X);
335         BODY_20_31(29,B,C,D,E,T,A,W,W,X,X);
336         BODY_20_31(30,A,B,C,D,E,T,W,X,X,X);
337         BODY_20_31(31,T,A,B,C,D,E,W,X,X,X);
338         BODY_32_39(32,E,T,A,B,C,D,X);
339         BODY_32_39(33,D,E,T,A,B,C,X);
340         BODY_32_39(34,C,D,E,T,A,B,X);
341         BODY_32_39(35,B,C,D,E,T,A,X);
342         BODY_32_39(36,A,B,C,D,E,T,X);
343         BODY_32_39(37,T,A,B,C,D,E,X);
344         BODY_32_39(38,E,T,A,B,C,D,X);
345         BODY_32_39(39,D,E,T,A,B,C,X);
346
347         BODY_40_59(40,C,D,E,T,A,B,X);
348         BODY_40_59(41,B,C,D,E,T,A,X);
349         BODY_40_59(42,A,B,C,D,E,T,X);
350         BODY_40_59(43,T,A,B,C,D,E,X);
351         BODY_40_59(44,E,T,A,B,C,D,X);
352         BODY_40_59(45,D,E,T,A,B,C,X);
353         BODY_40_59(46,C,D,E,T,A,B,X);
354         BODY_40_59(47,B,C,D,E,T,A,X);
355         BODY_40_59(48,A,B,C,D,E,T,X);
356         BODY_40_59(49,T,A,B,C,D,E,X);
357         BODY_40_59(50,E,T,A,B,C,D,X);
358         BODY_40_59(51,D,E,T,A,B,C,X);
359         BODY_40_59(52,C,D,E,T,A,B,X);
360         BODY_40_59(53,B,C,D,E,T,A,X);
361         BODY_40_59(54,A,B,C,D,E,T,X);
362         BODY_40_59(55,T,A,B,C,D,E,X);
363         BODY_40_59(56,E,T,A,B,C,D,X);
364         BODY_40_59(57,D,E,T,A,B,C,X);
365         BODY_40_59(58,C,D,E,T,A,B,X);
366         BODY_40_59(59,B,C,D,E,T,A,X);
367
368         BODY_60_79(60,A,B,C,D,E,T,X);
369         BODY_60_79(61,T,A,B,C,D,E,X);
370         BODY_60_79(62,E,T,A,B,C,D,X);
371         BODY_60_79(63,D,E,T,A,B,C,X);
372         BODY_60_79(64,C,D,E,T,A,B,X);
373         BODY_60_79(65,B,C,D,E,T,A,X);
374         BODY_60_79(66,A,B,C,D,E,T,X);
375         BODY_60_79(67,T,A,B,C,D,E,X);
376         BODY_60_79(68,E,T,A,B,C,D,X);
377         BODY_60_79(69,D,E,T,A,B,C,X);
378         BODY_60_79(70,C,D,E,T,A,B,X);
379         BODY_60_79(71,B,C,D,E,T,A,X);
380         BODY_60_79(72,A,B,C,D,E,T,X);
381         BODY_60_79(73,T,A,B,C,D,E,X);
382         BODY_60_79(74,E,T,A,B,C,D,X);
383         BODY_60_79(75,D,E,T,A,B,C,X);
384         BODY_60_79(76,C,D,E,T,A,B,X);
385         BODY_60_79(77,B,C,D,E,T,A,X);
386         BODY_60_79(78,A,B,C,D,E,T,X);
387         BODY_60_79(79,T,A,B,C,D,E,X);
388         
389         c->h0=(c->h0+E)&0xffffffffL; 
390         c->h1=(c->h1+T)&0xffffffffL;
391         c->h2=(c->h2+A)&0xffffffffL;
392         c->h3=(c->h3+B)&0xffffffffL;
393         c->h4=(c->h4+C)&0xffffffffL;
394
395         num-=64;
396         if (num <= 0) break;
397
398         A=c->h0;
399         B=c->h1;
400         C=c->h2;
401         D=c->h3;
402         E=c->h4;
403
404         W+=16;
405                 }
406         }
407
408 void SHA_Final(md, c)
409 unsigned char *md;
410 SHA_CTX *c;
411         {
412         int i,j;
413         u_int32_t l;
414         u_int32_t *p;
415         static unsigned char end[4]={0x80,0x00,0x00,0x00};
416         unsigned char *cp=end;
417
418         /* c->num should definitly have room for at least one more byte. */
419         p=c->data;
420         j=c->num;
421         i=j>>2;
422 #ifdef PURIFY
423         if ((j&0x03) == 0) p[i]=0;
424 #endif
425         l=p[i];
426         M_p_c2nl(cp,l,j&0x03);
427         p[i]=l;
428         i++;
429         /* i is the next 'undefined word' */
430         if (c->num >= SHA_LAST_BLOCK)
431                 {
432                 for (; i<SHA_LBLOCK; i++)
433                         p[i]=0;
434                 sha_block(c,p,64);
435                 i=0;
436                 }
437         for (; i<(SHA_LBLOCK-2); i++)
438                 p[i]=0;
439         p[SHA_LBLOCK-2]=c->Nh;
440         p[SHA_LBLOCK-1]=c->Nl;
441         sha_block(c,p,64);
442         cp=md;
443         l=c->h0; nl2c(l,cp);
444         l=c->h1; nl2c(l,cp);
445         l=c->h2; nl2c(l,cp);
446         l=c->h3; nl2c(l,cp);
447         l=c->h4; nl2c(l,cp);
448
449         /* clear stuff, sha_block may be leaving some stuff on the stack
450          * but I'm not worried :-) */
451         c->num=0;
452 /*      memset((char *)&c,0,sizeof(c));*/
453         }
454