344b3833d36fc3a8343bf489c6a726629c46cc39
[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 #include "opensslv.h"
66
67 char *SHA1_version="SHA1" OPENSSL_VERSION_PTEXT;
68
69 /* Implemented from SHA-1 document - The Secure Hash Algorithm
70  */
71
72 #define INIT_DATA_h0 (unsigned long)0x67452301L
73 #define INIT_DATA_h1 (unsigned long)0xefcdab89L
74 #define INIT_DATA_h2 (unsigned long)0x98badcfeL
75 #define INIT_DATA_h3 (unsigned long)0x10325476L
76 #define INIT_DATA_h4 (unsigned long)0xc3d2e1f0L
77
78 #define K_00_19 0x5a827999L
79 #define K_20_39 0x6ed9eba1L
80 #define K_40_59 0x8f1bbcdcL
81 #define K_60_79 0xca62c1d6L
82
83 #ifndef NOPROTO
84 #  ifdef SHA1_ASM
85      void sha1_block_x86(SHA_CTX *c, register unsigned long *p, int num);
86 #    define sha1_block sha1_block_x86
87 #  else
88      void sha1_block(SHA_CTX *c, register unsigned long *p, int num);
89 #  endif
90 #else
91 #  ifdef SHA1_ASM
92      void sha1_block_x86();
93 #    define sha1_block sha1_block_x86
94 #  else
95      void sha1_block();
96 #  endif
97 #endif
98
99
100 #if defined(L_ENDIAN) && defined(SHA1_ASM)
101 #  define       M_c2nl          c2l
102 #  define       M_p_c2nl        p_c2l
103 #  define       M_c2nl_p        c2l_p
104 #  define       M_p_c2nl_p      p_c2l_p
105 #  define       M_nl2c          l2c
106 #else
107 #  define       M_c2nl          c2nl
108 #  define       M_p_c2nl        p_c2nl
109 #  define       M_c2nl_p        c2nl_p
110 #  define       M_p_c2nl_p      p_c2nl_p
111 #  define       M_nl2c          nl2c
112 #endif
113
114 void SHA1_Init(c)
115 SHA_CTX *c;
116         {
117         c->h0=INIT_DATA_h0;
118         c->h1=INIT_DATA_h1;
119         c->h2=INIT_DATA_h2;
120         c->h3=INIT_DATA_h3;
121         c->h4=INIT_DATA_h4;
122         c->Nl=0;
123         c->Nh=0;
124         c->num=0;
125         }
126
127 void SHA1_Update(c, data, len)
128 SHA_CTX *c;
129 register unsigned char *data;
130 unsigned long len;
131         {
132         register ULONG *p;
133         int ew,ec,sw,sc;
134         ULONG l;
135
136         if (len == 0) return;
137
138         l=(c->Nl+(len<<3))&0xffffffffL;
139         if (l < c->Nl) /* overflow */
140                 c->Nh++;
141         c->Nh+=(len>>29);
142         c->Nl=l;
143
144         if (c->num != 0)
145                 {
146                 p=c->data;
147                 sw=c->num>>2;
148                 sc=c->num&0x03;
149
150                 if ((c->num+len) >= SHA_CBLOCK)
151                         {
152                         l= p[sw];
153                         M_p_c2nl(data,l,sc);
154                         p[sw++]=l;
155                         for (; sw<SHA_LBLOCK; sw++)
156                                 {
157                                 M_c2nl(data,l);
158                                 p[sw]=l;
159                                 }
160                         len-=(SHA_CBLOCK-c->num);
161
162                         sha1_block(c,p,64);
163                         c->num=0;
164                         /* drop through and do the rest */
165                         }
166                 else
167                         {
168                         c->num+=(int)len;
169                         if ((sc+len) < 4) /* ugly, add char's to a word */
170                                 {
171                                 l= p[sw];
172                                 M_p_c2nl_p(data,l,sc,len);
173                                 p[sw]=l;
174                                 }
175                         else
176                                 {
177                                 ew=(c->num>>2);
178                                 ec=(c->num&0x03);
179                                 l= p[sw];
180                                 M_p_c2nl(data,l,sc);
181                                 p[sw++]=l;
182                                 for (; sw < ew; sw++)
183                                         { M_c2nl(data,l); p[sw]=l; }
184                                 if (ec)
185                                         {
186                                         M_c2nl_p(data,l,ec);
187                                         p[sw]=l;
188                                         }
189                                 }
190                         return;
191                         }
192                 }
193         /* We can only do the following code for assember, the reason
194          * being that the sha1_block 'C' version changes the values
195          * in the 'data' array.  The assember code avoids this and
196          * copies it to a local array.  I should be able to do this for
197          * the C version as well....
198          */
199 #if 1
200 #if defined(B_ENDIAN) || defined(SHA1_ASM)
201         if ((((unsigned long)data)%sizeof(ULONG)) == 0)
202                 {
203                 sw=len/SHA_CBLOCK;
204                 if (sw)
205                         {
206                         sw*=SHA_CBLOCK;
207                         sha1_block(c,(ULONG *)data,sw);
208                         data+=sw;
209                         len-=sw;
210                         }
211                 }
212 #endif
213 #endif
214         /* we now can process the input data in blocks of SHA_CBLOCK
215          * chars and save the leftovers to c->data. */
216         p=c->data;
217         while (len >= SHA_CBLOCK)
218                 {
219 #if defined(B_ENDIAN) || defined(L_ENDIAN)
220                 if (p != (unsigned long *)data)
221                         memcpy(p,data,SHA_CBLOCK);
222                 data+=SHA_CBLOCK;
223 #  ifdef L_ENDIAN
224 #    ifndef SHA1_ASM /* Will not happen */
225                 for (sw=(SHA_LBLOCK/4); sw; sw--)
226                         {
227                         Endian_Reverse32(p[0]);
228                         Endian_Reverse32(p[1]);
229                         Endian_Reverse32(p[2]);
230                         Endian_Reverse32(p[3]);
231                         p+=4;
232                         }
233                 p=c->data;
234 #    endif
235 #  endif
236 #else
237                 for (sw=(SHA_BLOCK/4); sw; sw--)
238                         {
239                         M_c2nl(data,l); *(p++)=l;
240                         M_c2nl(data,l); *(p++)=l;
241                         M_c2nl(data,l); *(p++)=l;
242                         M_c2nl(data,l); *(p++)=l;
243                         }
244                 p=c->data;
245 #endif
246                 sha1_block(c,p,64);
247                 len-=SHA_CBLOCK;
248                 }
249         ec=(int)len;
250         c->num=ec;
251         ew=(ec>>2);
252         ec&=0x03;
253
254         for (sw=0; sw < ew; sw++)
255                 { M_c2nl(data,l); p[sw]=l; }
256         M_c2nl_p(data,l,ec);
257         p[sw]=l;
258         }
259
260 void SHA1_Transform(c,b)
261 SHA_CTX *c;
262 unsigned char *b;
263         {
264         ULONG p[16];
265 #ifndef B_ENDIAN
266         ULONG *q;
267         int i;
268 #endif
269
270 #if defined(B_ENDIAN) || defined(L_ENDIAN)
271         memcpy(p,b,64);
272 #ifdef L_ENDIAN
273         q=p;
274         for (i=(SHA_LBLOCK/4); i; i--)
275                 {
276                 Endian_Reverse32(q[0]);
277                 Endian_Reverse32(q[1]);
278                 Endian_Reverse32(q[2]);
279                 Endian_Reverse32(q[3]);
280                 q+=4;
281                 }
282 #endif
283 #else
284         q=p;
285         for (i=(SHA_LBLOCK/4); i; i--)
286                 {
287                 ULONG l;
288                 c2nl(b,l); *(q++)=l;
289                 c2nl(b,l); *(q++)=l;
290                 c2nl(b,l); *(q++)=l;
291                 c2nl(b,l); *(q++)=l; 
292                 } 
293 #endif
294         sha1_block(c,p,64);
295         }
296
297 #ifndef SHA1_ASM
298
299 void sha1_block(c, W, num)
300 SHA_CTX *c;
301 register unsigned long *W;
302 int num;
303         {
304         register ULONG A,B,C,D,E,T;
305         ULONG X[16];
306
307         A=c->h0;
308         B=c->h1;
309         C=c->h2;
310         D=c->h3;
311         E=c->h4;
312
313         for (;;)
314                 {
315         BODY_00_15( 0,A,B,C,D,E,T,W);
316         BODY_00_15( 1,T,A,B,C,D,E,W);
317         BODY_00_15( 2,E,T,A,B,C,D,W);
318         BODY_00_15( 3,D,E,T,A,B,C,W);
319         BODY_00_15( 4,C,D,E,T,A,B,W);
320         BODY_00_15( 5,B,C,D,E,T,A,W);
321         BODY_00_15( 6,A,B,C,D,E,T,W);
322         BODY_00_15( 7,T,A,B,C,D,E,W);
323         BODY_00_15( 8,E,T,A,B,C,D,W);
324         BODY_00_15( 9,D,E,T,A,B,C,W);
325         BODY_00_15(10,C,D,E,T,A,B,W);
326         BODY_00_15(11,B,C,D,E,T,A,W);
327         BODY_00_15(12,A,B,C,D,E,T,W);
328         BODY_00_15(13,T,A,B,C,D,E,W);
329         BODY_00_15(14,E,T,A,B,C,D,W);
330         BODY_00_15(15,D,E,T,A,B,C,W);
331         BODY_16_19(16,C,D,E,T,A,B,W,W,W,W);
332         BODY_16_19(17,B,C,D,E,T,A,W,W,W,W);
333         BODY_16_19(18,A,B,C,D,E,T,W,W,W,W);
334         BODY_16_19(19,T,A,B,C,D,E,W,W,W,X);
335
336         BODY_20_31(20,E,T,A,B,C,D,W,W,W,X);
337         BODY_20_31(21,D,E,T,A,B,C,W,W,W,X);
338         BODY_20_31(22,C,D,E,T,A,B,W,W,W,X);
339         BODY_20_31(23,B,C,D,E,T,A,W,W,W,X);
340         BODY_20_31(24,A,B,C,D,E,T,W,W,X,X);
341         BODY_20_31(25,T,A,B,C,D,E,W,W,X,X);
342         BODY_20_31(26,E,T,A,B,C,D,W,W,X,X);
343         BODY_20_31(27,D,E,T,A,B,C,W,W,X,X);
344         BODY_20_31(28,C,D,E,T,A,B,W,W,X,X);
345         BODY_20_31(29,B,C,D,E,T,A,W,W,X,X);
346         BODY_20_31(30,A,B,C,D,E,T,W,X,X,X);
347         BODY_20_31(31,T,A,B,C,D,E,W,X,X,X);
348         BODY_32_39(32,E,T,A,B,C,D,X);
349         BODY_32_39(33,D,E,T,A,B,C,X);
350         BODY_32_39(34,C,D,E,T,A,B,X);
351         BODY_32_39(35,B,C,D,E,T,A,X);
352         BODY_32_39(36,A,B,C,D,E,T,X);
353         BODY_32_39(37,T,A,B,C,D,E,X);
354         BODY_32_39(38,E,T,A,B,C,D,X);
355         BODY_32_39(39,D,E,T,A,B,C,X);
356
357         BODY_40_59(40,C,D,E,T,A,B,X);
358         BODY_40_59(41,B,C,D,E,T,A,X);
359         BODY_40_59(42,A,B,C,D,E,T,X);
360         BODY_40_59(43,T,A,B,C,D,E,X);
361         BODY_40_59(44,E,T,A,B,C,D,X);
362         BODY_40_59(45,D,E,T,A,B,C,X);
363         BODY_40_59(46,C,D,E,T,A,B,X);
364         BODY_40_59(47,B,C,D,E,T,A,X);
365         BODY_40_59(48,A,B,C,D,E,T,X);
366         BODY_40_59(49,T,A,B,C,D,E,X);
367         BODY_40_59(50,E,T,A,B,C,D,X);
368         BODY_40_59(51,D,E,T,A,B,C,X);
369         BODY_40_59(52,C,D,E,T,A,B,X);
370         BODY_40_59(53,B,C,D,E,T,A,X);
371         BODY_40_59(54,A,B,C,D,E,T,X);
372         BODY_40_59(55,T,A,B,C,D,E,X);
373         BODY_40_59(56,E,T,A,B,C,D,X);
374         BODY_40_59(57,D,E,T,A,B,C,X);
375         BODY_40_59(58,C,D,E,T,A,B,X);
376         BODY_40_59(59,B,C,D,E,T,A,X);
377
378         BODY_60_79(60,A,B,C,D,E,T,X);
379         BODY_60_79(61,T,A,B,C,D,E,X);
380         BODY_60_79(62,E,T,A,B,C,D,X);
381         BODY_60_79(63,D,E,T,A,B,C,X);
382         BODY_60_79(64,C,D,E,T,A,B,X);
383         BODY_60_79(65,B,C,D,E,T,A,X);
384         BODY_60_79(66,A,B,C,D,E,T,X);
385         BODY_60_79(67,T,A,B,C,D,E,X);
386         BODY_60_79(68,E,T,A,B,C,D,X);
387         BODY_60_79(69,D,E,T,A,B,C,X);
388         BODY_60_79(70,C,D,E,T,A,B,X);
389         BODY_60_79(71,B,C,D,E,T,A,X);
390         BODY_60_79(72,A,B,C,D,E,T,X);
391         BODY_60_79(73,T,A,B,C,D,E,X);
392         BODY_60_79(74,E,T,A,B,C,D,X);
393         BODY_60_79(75,D,E,T,A,B,C,X);
394         BODY_60_79(76,C,D,E,T,A,B,X);
395         BODY_60_79(77,B,C,D,E,T,A,X);
396         BODY_60_79(78,A,B,C,D,E,T,X);
397         BODY_60_79(79,T,A,B,C,D,E,X);
398         
399         c->h0=(c->h0+E)&0xffffffffL; 
400         c->h1=(c->h1+T)&0xffffffffL;
401         c->h2=(c->h2+A)&0xffffffffL;
402         c->h3=(c->h3+B)&0xffffffffL;
403         c->h4=(c->h4+C)&0xffffffffL;
404
405         num-=64;
406         if (num <= 0) break;
407
408         A=c->h0;
409         B=c->h1;
410         C=c->h2;
411         D=c->h3;
412         E=c->h4;
413
414         W+=16;
415                 }
416         }
417 #endif
418
419 void SHA1_Final(md, c)
420 unsigned char *md;
421 SHA_CTX *c;
422         {
423         register int i,j;
424         register ULONG l;
425         register ULONG *p;
426         static unsigned char end[4]={0x80,0x00,0x00,0x00};
427         unsigned char *cp=end;
428
429         /* c->num should definitly have room for at least one more byte. */
430         p=c->data;
431         j=c->num;
432         i=j>>2;
433 #ifdef PURIFY
434         if ((j&0x03) == 0) p[i]=0;
435 #endif
436         l=p[i];
437         M_p_c2nl(cp,l,j&0x03);
438         p[i]=l;
439         i++;
440         /* i is the next 'undefined word' */
441         if (c->num >= SHA_LAST_BLOCK)
442                 {
443                 for (; i<SHA_LBLOCK; i++)
444                         p[i]=0;
445                 sha1_block(c,p,64);
446                 i=0;
447                 }
448         for (; i<(SHA_LBLOCK-2); i++)
449                 p[i]=0;
450         p[SHA_LBLOCK-2]=c->Nh;
451         p[SHA_LBLOCK-1]=c->Nl;
452 #if defined(L_ENDIAN) && defined(SHA1_ASM)
453         Endian_Reverse32(p[SHA_LBLOCK-2]);
454         Endian_Reverse32(p[SHA_LBLOCK-1]);
455 #endif
456         sha1_block(c,p,64);
457         cp=md;
458         l=c->h0; nl2c(l,cp);
459         l=c->h1; nl2c(l,cp);
460         l=c->h2; nl2c(l,cp);
461         l=c->h3; nl2c(l,cp);
462         l=c->h4; nl2c(l,cp);
463
464         /* clear stuff, sha1_block may be leaving some stuff on the stack
465          * but I'm not worried :-) */
466         c->num=0;
467 /*      memset((char *)&c,0,sizeof(c));*/
468         }
469