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[openssl.git] / crypto / sha / sha1dgst.c
1 /* crypto/sha/sha1dgst.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 <stdio.h>
60 #include <string.h>
61 #undef  SHA_0
62 #define SHA_1
63 #include "sha.h"
64 #include "sha_locl.h"
65
66 char *SHA1_version="SHA1 part of SSLeay 0.9.0b 29-Jun-1998";
67
68 /* Implemented from SHA-1 document - The Secure Hash Algorithm
69  */
70
71 #define INIT_DATA_h0 (unsigned long)0x67452301L
72 #define INIT_DATA_h1 (unsigned long)0xefcdab89L
73 #define INIT_DATA_h2 (unsigned long)0x98badcfeL
74 #define INIT_DATA_h3 (unsigned long)0x10325476L
75 #define INIT_DATA_h4 (unsigned long)0xc3d2e1f0L
76
77 #define K_00_19 0x5a827999L
78 #define K_20_39 0x6ed9eba1L
79 #define K_40_59 0x8f1bbcdcL
80 #define K_60_79 0xca62c1d6L
81
82 #ifndef NOPROTO
83 #  ifdef SHA1_ASM
84      void sha1_block_x86(SHA_CTX *c, register unsigned long *p, int num);
85 #    define sha1_block sha1_block_x86
86 #  else
87      void sha1_block(SHA_CTX *c, register unsigned long *p, int num);
88 #  endif
89 #else
90 #  ifdef SHA1_ASM
91      void sha1_block_x86();
92 #    define sha1_block sha1_block_x86
93 #  else
94      void sha1_block();
95 #  endif
96 #endif
97
98
99 #if defined(L_ENDIAN) && defined(SHA1_ASM)
100 #  define       M_c2nl          c2l
101 #  define       M_p_c2nl        p_c2l
102 #  define       M_c2nl_p        c2l_p
103 #  define       M_p_c2nl_p      p_c2l_p
104 #  define       M_nl2c          l2c
105 #else
106 #  define       M_c2nl          c2nl
107 #  define       M_p_c2nl        p_c2nl
108 #  define       M_c2nl_p        c2nl_p
109 #  define       M_p_c2nl_p      p_c2nl_p
110 #  define       M_nl2c          nl2c
111 #endif
112
113 void SHA1_Init(c)
114 SHA_CTX *c;
115         {
116         c->h0=INIT_DATA_h0;
117         c->h1=INIT_DATA_h1;
118         c->h2=INIT_DATA_h2;
119         c->h3=INIT_DATA_h3;
120         c->h4=INIT_DATA_h4;
121         c->Nl=0;
122         c->Nh=0;
123         c->num=0;
124         }
125
126 void SHA1_Update(c, data, len)
127 SHA_CTX *c;
128 register unsigned char *data;
129 unsigned long len;
130         {
131         register ULONG *p;
132         int ew,ec,sw,sc;
133         ULONG l;
134
135         if (len == 0) return;
136
137         l=(c->Nl+(len<<3))&0xffffffffL;
138         if (l < c->Nl) /* overflow */
139                 c->Nh++;
140         c->Nh+=(len>>29);
141         c->Nl=l;
142
143         if (c->num != 0)
144                 {
145                 p=c->data;
146                 sw=c->num>>2;
147                 sc=c->num&0x03;
148
149                 if ((c->num+len) >= SHA_CBLOCK)
150                         {
151                         l= p[sw];
152                         M_p_c2nl(data,l,sc);
153                         p[sw++]=l;
154                         for (; sw<SHA_LBLOCK; sw++)
155                                 {
156                                 M_c2nl(data,l);
157                                 p[sw]=l;
158                                 }
159                         len-=(SHA_CBLOCK-c->num);
160
161                         sha1_block(c,p,64);
162                         c->num=0;
163                         /* drop through and do the rest */
164                         }
165                 else
166                         {
167                         c->num+=(int)len;
168                         if ((sc+len) < 4) /* ugly, add char's to a word */
169                                 {
170                                 l= p[sw];
171                                 M_p_c2nl_p(data,l,sc,len);
172                                 p[sw]=l;
173                                 }
174                         else
175                                 {
176                                 ew=(c->num>>2);
177                                 ec=(c->num&0x03);
178                                 l= p[sw];
179                                 M_p_c2nl(data,l,sc);
180                                 p[sw++]=l;
181                                 for (; sw < ew; sw++)
182                                         { M_c2nl(data,l); p[sw]=l; }
183                                 if (ec)
184                                         {
185                                         M_c2nl_p(data,l,ec);
186                                         p[sw]=l;
187                                         }
188                                 }
189                         return;
190                         }
191                 }
192         /* We can only do the following code for assember, the reason
193          * being that the sha1_block 'C' version changes the values
194          * in the 'data' array.  The assember code avoids this and
195          * copies it to a local array.  I should be able to do this for
196          * the C version as well....
197          */
198 #if 1
199 #if defined(B_ENDIAN) || defined(SHA1_ASM)
200         if ((((unsigned int)data)%sizeof(ULONG)) == 0)
201                 {
202                 sw=len/SHA_CBLOCK;
203                 if (sw)
204                         {
205                         sw*=SHA_CBLOCK;
206                         sha1_block(c,(ULONG *)data,sw);
207                         data+=sw;
208                         len-=sw;
209                         }
210                 }
211 #endif
212 #endif
213         /* we now can process the input data in blocks of SHA_CBLOCK
214          * chars and save the leftovers to c->data. */
215         p=c->data;
216         while (len >= SHA_CBLOCK)
217                 {
218 #if defined(B_ENDIAN) || defined(L_ENDIAN)
219                 if (p != (unsigned long *)data)
220                         memcpy(p,data,SHA_CBLOCK);
221                 data+=SHA_CBLOCK;
222 #  ifdef L_ENDIAN
223 #    ifndef SHA1_ASM /* Will not happen */
224                 for (sw=(SHA_LBLOCK/4); sw; sw--)
225                         {
226                         Endian_Reverse32(p[0]);
227                         Endian_Reverse32(p[1]);
228                         Endian_Reverse32(p[2]);
229                         Endian_Reverse32(p[3]);
230                         p+=4;
231                         }
232                 p=c->data;
233 #    endif
234 #  endif
235 #else
236                 for (sw=(SHA_BLOCK/4); sw; sw--)
237                         {
238                         M_c2nl(data,l); *(p++)=l;
239                         M_c2nl(data,l); *(p++)=l;
240                         M_c2nl(data,l); *(p++)=l;
241                         M_c2nl(data,l); *(p++)=l;
242                         }
243                 p=c->data;
244 #endif
245                 sha1_block(c,p,64);
246                 len-=SHA_CBLOCK;
247                 }
248         ec=(int)len;
249         c->num=ec;
250         ew=(ec>>2);
251         ec&=0x03;
252
253         for (sw=0; sw < ew; sw++)
254                 { M_c2nl(data,l); p[sw]=l; }
255         M_c2nl_p(data,l,ec);
256         p[sw]=l;
257         }
258
259 void SHA1_Transform(c,b)
260 SHA_CTX *c;
261 unsigned char *b;
262         {
263         ULONG p[16];
264 #ifndef B_ENDIAN
265         ULONG *q;
266         int i;
267 #endif
268
269 #if defined(B_ENDIAN) || defined(L_ENDIAN)
270         memcpy(p,b,64);
271 #ifdef L_ENDIAN
272         q=p;
273         for (i=(SHA_LBLOCK/4); i; i--)
274                 {
275                 Endian_Reverse32(q[0]);
276                 Endian_Reverse32(q[1]);
277                 Endian_Reverse32(q[2]);
278                 Endian_Reverse32(q[3]);
279                 q+=4;
280                 }
281 #endif
282 #else
283         q=p;
284         for (i=(SHA_LBLOCK/4); i; i--)
285                 {
286                 ULONG l;
287                 c2nl(b,l); *(q++)=l;
288                 c2nl(b,l); *(q++)=l;
289                 c2nl(b,l); *(q++)=l;
290                 c2nl(b,l); *(q++)=l; 
291                 } 
292 #endif
293         sha1_block(c,p,64);
294         }
295
296 #ifndef SHA1_ASM
297
298 void sha1_block(c, W, num)
299 SHA_CTX *c;
300 register unsigned long *W;
301 int num;
302         {
303         register ULONG A,B,C,D,E,T;
304         ULONG X[16];
305
306         A=c->h0;
307         B=c->h1;
308         C=c->h2;
309         D=c->h3;
310         E=c->h4;
311
312         for (;;)
313                 {
314         BODY_00_15( 0,A,B,C,D,E,T,W);
315         BODY_00_15( 1,T,A,B,C,D,E,W);
316         BODY_00_15( 2,E,T,A,B,C,D,W);
317         BODY_00_15( 3,D,E,T,A,B,C,W);
318         BODY_00_15( 4,C,D,E,T,A,B,W);
319         BODY_00_15( 5,B,C,D,E,T,A,W);
320         BODY_00_15( 6,A,B,C,D,E,T,W);
321         BODY_00_15( 7,T,A,B,C,D,E,W);
322         BODY_00_15( 8,E,T,A,B,C,D,W);
323         BODY_00_15( 9,D,E,T,A,B,C,W);
324         BODY_00_15(10,C,D,E,T,A,B,W);
325         BODY_00_15(11,B,C,D,E,T,A,W);
326         BODY_00_15(12,A,B,C,D,E,T,W);
327         BODY_00_15(13,T,A,B,C,D,E,W);
328         BODY_00_15(14,E,T,A,B,C,D,W);
329         BODY_00_15(15,D,E,T,A,B,C,W);
330         BODY_16_19(16,C,D,E,T,A,B,W,W,W,W);
331         BODY_16_19(17,B,C,D,E,T,A,W,W,W,W);
332         BODY_16_19(18,A,B,C,D,E,T,W,W,W,W);
333         BODY_16_19(19,T,A,B,C,D,E,W,W,W,X);
334
335         BODY_20_31(20,E,T,A,B,C,D,W,W,W,X);
336         BODY_20_31(21,D,E,T,A,B,C,W,W,W,X);
337         BODY_20_31(22,C,D,E,T,A,B,W,W,W,X);
338         BODY_20_31(23,B,C,D,E,T,A,W,W,W,X);
339         BODY_20_31(24,A,B,C,D,E,T,W,W,X,X);
340         BODY_20_31(25,T,A,B,C,D,E,W,W,X,X);
341         BODY_20_31(26,E,T,A,B,C,D,W,W,X,X);
342         BODY_20_31(27,D,E,T,A,B,C,W,W,X,X);
343         BODY_20_31(28,C,D,E,T,A,B,W,W,X,X);
344         BODY_20_31(29,B,C,D,E,T,A,W,W,X,X);
345         BODY_20_31(30,A,B,C,D,E,T,W,X,X,X);
346         BODY_20_31(31,T,A,B,C,D,E,W,X,X,X);
347         BODY_32_39(32,E,T,A,B,C,D,X);
348         BODY_32_39(33,D,E,T,A,B,C,X);
349         BODY_32_39(34,C,D,E,T,A,B,X);
350         BODY_32_39(35,B,C,D,E,T,A,X);
351         BODY_32_39(36,A,B,C,D,E,T,X);
352         BODY_32_39(37,T,A,B,C,D,E,X);
353         BODY_32_39(38,E,T,A,B,C,D,X);
354         BODY_32_39(39,D,E,T,A,B,C,X);
355
356         BODY_40_59(40,C,D,E,T,A,B,X);
357         BODY_40_59(41,B,C,D,E,T,A,X);
358         BODY_40_59(42,A,B,C,D,E,T,X);
359         BODY_40_59(43,T,A,B,C,D,E,X);
360         BODY_40_59(44,E,T,A,B,C,D,X);
361         BODY_40_59(45,D,E,T,A,B,C,X);
362         BODY_40_59(46,C,D,E,T,A,B,X);
363         BODY_40_59(47,B,C,D,E,T,A,X);
364         BODY_40_59(48,A,B,C,D,E,T,X);
365         BODY_40_59(49,T,A,B,C,D,E,X);
366         BODY_40_59(50,E,T,A,B,C,D,X);
367         BODY_40_59(51,D,E,T,A,B,C,X);
368         BODY_40_59(52,C,D,E,T,A,B,X);
369         BODY_40_59(53,B,C,D,E,T,A,X);
370         BODY_40_59(54,A,B,C,D,E,T,X);
371         BODY_40_59(55,T,A,B,C,D,E,X);
372         BODY_40_59(56,E,T,A,B,C,D,X);
373         BODY_40_59(57,D,E,T,A,B,C,X);
374         BODY_40_59(58,C,D,E,T,A,B,X);
375         BODY_40_59(59,B,C,D,E,T,A,X);
376
377         BODY_60_79(60,A,B,C,D,E,T,X);
378         BODY_60_79(61,T,A,B,C,D,E,X);
379         BODY_60_79(62,E,T,A,B,C,D,X);
380         BODY_60_79(63,D,E,T,A,B,C,X);
381         BODY_60_79(64,C,D,E,T,A,B,X);
382         BODY_60_79(65,B,C,D,E,T,A,X);
383         BODY_60_79(66,A,B,C,D,E,T,X);
384         BODY_60_79(67,T,A,B,C,D,E,X);
385         BODY_60_79(68,E,T,A,B,C,D,X);
386         BODY_60_79(69,D,E,T,A,B,C,X);
387         BODY_60_79(70,C,D,E,T,A,B,X);
388         BODY_60_79(71,B,C,D,E,T,A,X);
389         BODY_60_79(72,A,B,C,D,E,T,X);
390         BODY_60_79(73,T,A,B,C,D,E,X);
391         BODY_60_79(74,E,T,A,B,C,D,X);
392         BODY_60_79(75,D,E,T,A,B,C,X);
393         BODY_60_79(76,C,D,E,T,A,B,X);
394         BODY_60_79(77,B,C,D,E,T,A,X);
395         BODY_60_79(78,A,B,C,D,E,T,X);
396         BODY_60_79(79,T,A,B,C,D,E,X);
397         
398         c->h0=(c->h0+E)&0xffffffffL; 
399         c->h1=(c->h1+T)&0xffffffffL;
400         c->h2=(c->h2+A)&0xffffffffL;
401         c->h3=(c->h3+B)&0xffffffffL;
402         c->h4=(c->h4+C)&0xffffffffL;
403
404         num-=64;
405         if (num <= 0) break;
406
407         A=c->h0;
408         B=c->h1;
409         C=c->h2;
410         D=c->h3;
411         E=c->h4;
412
413         W+=16;
414                 }
415         }
416 #endif
417
418 void SHA1_Final(md, c)
419 unsigned char *md;
420 SHA_CTX *c;
421         {
422         register int i,j;
423         register ULONG l;
424         register ULONG *p;
425         static unsigned char end[4]={0x80,0x00,0x00,0x00};
426         unsigned char *cp=end;
427
428         /* c->num should definitly have room for at least one more byte. */
429         p=c->data;
430         j=c->num;
431         i=j>>2;
432 #ifdef PURIFY
433         if ((j&0x03) == 0) p[i]=0;
434 #endif
435         l=p[i];
436         M_p_c2nl(cp,l,j&0x03);
437         p[i]=l;
438         i++;
439         /* i is the next 'undefined word' */
440         if (c->num >= SHA_LAST_BLOCK)
441                 {
442                 for (; i<SHA_LBLOCK; i++)
443                         p[i]=0;
444                 sha1_block(c,p,64);
445                 i=0;
446                 }
447         for (; i<(SHA_LBLOCK-2); i++)
448                 p[i]=0;
449         p[SHA_LBLOCK-2]=c->Nh;
450         p[SHA_LBLOCK-1]=c->Nl;
451 #if defined(L_ENDIAN) && defined(SHA1_ASM)
452         Endian_Reverse32(p[SHA_LBLOCK-2]);
453         Endian_Reverse32(p[SHA_LBLOCK-1]);
454 #endif
455         sha1_block(c,p,64);
456         cp=md;
457         l=c->h0; nl2c(l,cp);
458         l=c->h1; nl2c(l,cp);
459         l=c->h2; nl2c(l,cp);
460         l=c->h3; nl2c(l,cp);
461         l=c->h4; nl2c(l,cp);
462
463         /* clear stuff, sha1_block may be leaving some stuff on the stack
464          * but I'm not worried :-) */
465         c->num=0;
466 /*      memset((char *)&c,0,sizeof(c));*/
467         }
468