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 <openssl/sha.h>
  64 #include "sha_locl.h"
  65 #include <openssl/opensslv.h>
  66
  67 #ifndef NO_SHA1
  68 char *SHA1_version="SHA1" OPENSSL_VERSION_PTEXT;
  69
  70 /* Implemented from SHA-1 document - The Secure Hash Algorithm
  71  */
  72
  73 #define INIT_DATA_h0 0x67452301UL
  74 #define INIT_DATA_h1 0xefcdab89UL
  75 #define INIT_DATA_h2 0x98badcfeUL
  76 #define INIT_DATA_h3 0x10325476UL
  77 #define INIT_DATA_h4 0xc3d2e1f0UL
  78
  79 #define K_00_19 0x5a827999UL
  80 #define K_20_39 0x6ed9eba1UL
  81 #define K_40_59 0x8f1bbcdcUL
  82 #define K_60_79 0xca62c1d6UL
  83
  84 #ifdef SHA1_ASM
  85    void sha1_block_x86(SHA_CTX *c, register SHA_LONG *p, int num);
  86 #  define sha1_block(c,p,n) sha1_block_x86((c),(p),(n)*SHA_CBLOCK)
  87 #else
  88    static void sha1_block(SHA_CTX *c, register SHA_LONG *p, int num);
  89 #endif
  90
  91 #if !defined(B_ENDIAN) && defined(SHA1_ASM)
  92 #  define       M_c2nl          c2l
  93 #  define       M_p_c2nl        p_c2l
  94 #  define       M_c2nl_p        c2l_p
  95 #  define       M_p_c2nl_p      p_c2l_p
  96 #  define       M_nl2c          l2c
  97 #else
  98 #  define       M_c2nl          c2nl
  99 #  define       M_p_c2nl        p_c2nl
 100 #  define       M_c2nl_p        c2nl_p
 101 #  define       M_p_c2nl_p      p_c2nl_p
 102 #  define       M_nl2c          nl2c
 103 #endif
 104
 105 void SHA1_Init(SHA_CTX *c)
 106         {
 107         c->h0=INIT_DATA_h0;
 108         c->h1=INIT_DATA_h1;
 109         c->h2=INIT_DATA_h2;
 110         c->h3=INIT_DATA_h3;
 111         c->h4=INIT_DATA_h4;
 112         c->Nl=0;
 113         c->Nh=0;
 114         c->num=0;
 115         }
 116
 117 void SHA1_Update(SHA_CTX *c, const register unsigned char *data,
 118              unsigned long len)
 119         {
 120         register SHA_LONG *p;
 121         int ew,ec,sw,sc;
 122         SHA_LONG l;
 123
 124         if (len == 0) return;
 125
 126         l=(c->Nl+(len<<3))&0xffffffffL;
 127         if (l < c->Nl) /* overflow */
 128                 c->Nh++;
 129         c->Nh+=(len>>29);
 130         c->Nl=l;
 131
 132         if (c->num != 0)
 133                 {
 134                 p=c->data;
 135                 sw=c->num>>2;
 136                 sc=c->num&0x03;
 137
 138                 if ((c->num+len) >= SHA_CBLOCK)
 139                         {
 140                         l= p[sw];
 141                         M_p_c2nl(data,l,sc);
 142                         p[sw++]=l;
 143                         for (; sw<SHA_LBLOCK; sw++)
 144                                 {
 145                                 M_c2nl(data,l);
 146                                 p[sw]=l;
 147                                 }
 148                         len-=(SHA_CBLOCK-c->num);
 149
 150                         sha1_block(c,p,1);
 151                         c->num=0;
 152                         /* drop through and do the rest */
 153                         }
 154                 else
 155                         {
 156                         c->num+=(int)len;
 157                         if ((sc+len) < 4) /* ugly, add char's to a word */
 158                                 {
 159                                 l= p[sw];
 160                                 M_p_c2nl_p(data,l,sc,len);
 161                                 p[sw]=l;
 162                                 }
 163                         else
 164                                 {
 165                                 ew=(c->num>>2);
 166                                 ec=(c->num&0x03);
 167                                 l= p[sw];
 168                                 M_p_c2nl(data,l,sc);
 169                                 p[sw++]=l;
 170                                 for (; sw < ew; sw++)
 171                                         { M_c2nl(data,l); p[sw]=l; }
 172                                 if (ec)
 173                                         {
 174                                         M_c2nl_p(data,l,ec);
 175                                         p[sw]=l;
 176                                         }
 177                                 }
 178                         return;
 179                         }
 180                 }
 181         /* We can only do the following code for assember, the reason
 182          * being that the sha1_block 'C' version changes the values
 183          * in the 'data' array.  The assember code avoids this and
 184          * copies it to a local array.  I should be able to do this for
 185          * the C version as well....
 186          */
 187 #if SHA_LONG_LOG2==2
 188 #if defined(B_ENDIAN) || defined(SHA1_ASM)
 189         if ((((unsigned long)data)%sizeof(SHA_LONG)) == 0)
 190                 {
 191                 sw=len/SHA_CBLOCK;
 192                 if (sw)
 193                         {
 194                         sha1_block(c,(SHA_LONG *)data,sw);
 195                         sw*=SHA_CBLOCK;
 196                         data+=sw;
 197                         len-=sw;
 198                         }
 199                 }
 200 #endif
 201 #endif
 202         /* we now can process the input data in blocks of SHA_CBLOCK
 203          * chars and save the leftovers to c->data. */
 204         p=c->data;
 205         while (len >= SHA_CBLOCK)
 206                 {
 207 #if SHA_LONG_LOG2==2
 208 #if defined(B_ENDIAN) || defined(SHA1_ASM)
 209 #define SHA_NO_TAIL_CODE
 210                 /*
 211                  * Basically we get here only when data happens
 212                  * to be unaligned.
 213                  */
 214                 if (p != (SHA_LONG *)data)
 215                         memcpy(p,data,SHA_CBLOCK);
 216                 data+=SHA_CBLOCK;
 217                 sha1_block(c,p=c->data,1);
 218                 len-=SHA_CBLOCK;
 219 #else   /* little-endian */
 220 #define BE_COPY(dst,src,i)      {                               \
 221                                 l = ((SHA_LONG *)src)[i];       \
 222                                 Endian_Reverse32(l);            \
 223                                 dst[i] = l;                     \
 224                                 }
 225                 if ((((unsigned long)data)%sizeof(SHA_LONG)) == 0)
 226                         {
 227                         for (sw=(SHA_LBLOCK/4); sw; sw--)
 228                                 {
 229                                 BE_COPY(p,data,0);
 230                                 BE_COPY(p,data,1);
 231                                 BE_COPY(p,data,2);
 232                                 BE_COPY(p,data,3);
 233                                 p+=4;
 234                                 data += 4*sizeof(SHA_LONG);
 235                                 }
 236                         sha1_block(c,p=c->data,1);
 237                         len-=SHA_CBLOCK;
 238                         continue;
 239                         }
 240 #endif
 241 #endif
 242 #ifndef SHA_NO_TAIL_CODE
 243                 /*
 244                  * In addition to "sizeof(SHA_LONG)!= 4" case the
 245                  * following code covers unaligned access cases on
 246                  * little-endian machines.
 247                  *                      <appro@fy.chalmers.se>
 248                  */
 249                 p=c->data;
 250                 for (sw=(SHA_LBLOCK/4); sw; sw--)
 251                         {
 252                         M_c2nl(data,l); p[0]=l;
 253                         M_c2nl(data,l); p[1]=l;
 254                         M_c2nl(data,l); p[2]=l;
 255                         M_c2nl(data,l); p[3]=l;
 256                         p+=4;
 257                         }
 258                 p=c->data;
 259                 sha1_block(c,p,1);
 260                 len-=SHA_CBLOCK;
 261 #endif
 262                 }
 263         ec=(int)len;
 264         c->num=ec;
 265         ew=(ec>>2);
 266         ec&=0x03;
 267
 268         for (sw=0; sw < ew; sw++)
 269                 { M_c2nl(data,l); p[sw]=l; }
 270         M_c2nl_p(data,l,ec);
 271         p[sw]=l;
 272         }
 273
 274 void SHA1_Transform(SHA_CTX *c, unsigned char *b)
 275         {
 276         SHA_LONG p[SHA_LBLOCK];
 277         SHA_LONG *q;
 278         int i;
 279
 280 #if SHA_LONG_LOG2==2
 281 #if defined(B_ENDIAN) || defined(SHA1_ASM)
 282         memcpy(p,b,SHA_CBLOCK);
 283         sha1_block(c,p,1);
 284         return;
 285 #else
 286         if (((unsigned long)b%sizeof(SHA_LONG)) == 0)
 287                 {
 288                 q=p;
 289                 for (i=(SHA_LBLOCK/4); i; i--)
 290                         {
 291                         unsigned long l;
 292                         BE_COPY(q,b,0); /* BE_COPY was defined above */
 293                         BE_COPY(q,b,1);
 294                         BE_COPY(q,b,2);
 295                         BE_COPY(q,b,3);
 296                         q+=4;
 297                         b+=4*sizeof(SHA_LONG);
 298                         }
 299                 sha1_block(c,p,1);
 300                 return;
 301                 }
 302 #endif
 303 #endif
 304 #ifndef SHA_NO_TAIL_CODE /* defined above, see comment */
 305         q=p;
 306         for (i=(SHA_LBLOCK/4); i; i--)
 307                 {
 308                 SHA_LONG l;
 309                 c2nl(b,l); *(q++)=l;
 310                 c2nl(b,l); *(q++)=l;
 311                 c2nl(b,l); *(q++)=l;
 312                 c2nl(b,l); *(q++)=l;
 313                 }
 314         sha1_block(c,p,1);
 315 #endif
 316         }
 317
 318 #ifndef SHA1_ASM
 319 static void sha1_block(SHA_CTX *c, register SHA_LONG *W, int num)
 320         {
 321         register SHA_LONG A,B,C,D,E,T;
 322         SHA_LONG X[SHA_LBLOCK];
 323
 324         A=c->h0;
 325         B=c->h1;
 326         C=c->h2;
 327         D=c->h3;
 328         E=c->h4;
 329
 330         for (;;)
 331                 {
 332         BODY_00_15( 0,A,B,C,D,E,T,W);
 333         BODY_00_15( 1,T,A,B,C,D,E,W);
 334         BODY_00_15( 2,E,T,A,B,C,D,W);
 335         BODY_00_15( 3,D,E,T,A,B,C,W);
 336         BODY_00_15( 4,C,D,E,T,A,B,W);
 337         BODY_00_15( 5,B,C,D,E,T,A,W);
 338         BODY_00_15( 6,A,B,C,D,E,T,W);
 339         BODY_00_15( 7,T,A,B,C,D,E,W);
 340         BODY_00_15( 8,E,T,A,B,C,D,W);
 341         BODY_00_15( 9,D,E,T,A,B,C,W);
 342         BODY_00_15(10,C,D,E,T,A,B,W);
 343         BODY_00_15(11,B,C,D,E,T,A,W);
 344         BODY_00_15(12,A,B,C,D,E,T,W);
 345         BODY_00_15(13,T,A,B,C,D,E,W);
 346         BODY_00_15(14,E,T,A,B,C,D,W);
 347         BODY_00_15(15,D,E,T,A,B,C,W);
 348         BODY_16_19(16,C,D,E,T,A,B,W,W,W,W);
 349         BODY_16_19(17,B,C,D,E,T,A,W,W,W,W);
 350         BODY_16_19(18,A,B,C,D,E,T,W,W,W,W);
 351         BODY_16_19(19,T,A,B,C,D,E,W,W,W,X);
 352
 353         BODY_20_31(20,E,T,A,B,C,D,W,W,W,X);
 354         BODY_20_31(21,D,E,T,A,B,C,W,W,W,X);
 355         BODY_20_31(22,C,D,E,T,A,B,W,W,W,X);
 356         BODY_20_31(23,B,C,D,E,T,A,W,W,W,X);
 357         BODY_20_31(24,A,B,C,D,E,T,W,W,X,X);
 358         BODY_20_31(25,T,A,B,C,D,E,W,W,X,X);
 359         BODY_20_31(26,E,T,A,B,C,D,W,W,X,X);
 360         BODY_20_31(27,D,E,T,A,B,C,W,W,X,X);
 361         BODY_20_31(28,C,D,E,T,A,B,W,W,X,X);
 362         BODY_20_31(29,B,C,D,E,T,A,W,W,X,X);
 363         BODY_20_31(30,A,B,C,D,E,T,W,X,X,X);
 364         BODY_20_31(31,T,A,B,C,D,E,W,X,X,X);
 365         BODY_32_39(32,E,T,A,B,C,D,X);
 366         BODY_32_39(33,D,E,T,A,B,C,X);
 367         BODY_32_39(34,C,D,E,T,A,B,X);
 368         BODY_32_39(35,B,C,D,E,T,A,X);
 369         BODY_32_39(36,A,B,C,D,E,T,X);
 370         BODY_32_39(37,T,A,B,C,D,E,X);
 371         BODY_32_39(38,E,T,A,B,C,D,X);
 372         BODY_32_39(39,D,E,T,A,B,C,X);
 373
 374         BODY_40_59(40,C,D,E,T,A,B,X);
 375         BODY_40_59(41,B,C,D,E,T,A,X);
 376         BODY_40_59(42,A,B,C,D,E,T,X);
 377         BODY_40_59(43,T,A,B,C,D,E,X);
 378         BODY_40_59(44,E,T,A,B,C,D,X);
 379         BODY_40_59(45,D,E,T,A,B,C,X);
 380         BODY_40_59(46,C,D,E,T,A,B,X);
 381         BODY_40_59(47,B,C,D,E,T,A,X);
 382         BODY_40_59(48,A,B,C,D,E,T,X);
 383         BODY_40_59(49,T,A,B,C,D,E,X);
 384         BODY_40_59(50,E,T,A,B,C,D,X);
 385         BODY_40_59(51,D,E,T,A,B,C,X);
 386         BODY_40_59(52,C,D,E,T,A,B,X);
 387         BODY_40_59(53,B,C,D,E,T,A,X);
 388         BODY_40_59(54,A,B,C,D,E,T,X);
 389         BODY_40_59(55,T,A,B,C,D,E,X);
 390         BODY_40_59(56,E,T,A,B,C,D,X);
 391         BODY_40_59(57,D,E,T,A,B,C,X);
 392         BODY_40_59(58,C,D,E,T,A,B,X);
 393         BODY_40_59(59,B,C,D,E,T,A,X);
 394
 395         BODY_60_79(60,A,B,C,D,E,T,X);
 396         BODY_60_79(61,T,A,B,C,D,E,X);
 397         BODY_60_79(62,E,T,A,B,C,D,X);
 398         BODY_60_79(63,D,E,T,A,B,C,X);
 399         BODY_60_79(64,C,D,E,T,A,B,X);
 400         BODY_60_79(65,B,C,D,E,T,A,X);
 401         BODY_60_79(66,A,B,C,D,E,T,X);
 402         BODY_60_79(67,T,A,B,C,D,E,X);
 403         BODY_60_79(68,E,T,A,B,C,D,X);
 404         BODY_60_79(69,D,E,T,A,B,C,X);
 405         BODY_60_79(70,C,D,E,T,A,B,X);
 406         BODY_60_79(71,B,C,D,E,T,A,X);
 407         BODY_60_79(72,A,B,C,D,E,T,X);
 408         BODY_60_79(73,T,A,B,C,D,E,X);
 409         BODY_60_79(74,E,T,A,B,C,D,X);
 410         BODY_60_79(75,D,E,T,A,B,C,X);
 411         BODY_60_79(76,C,D,E,T,A,B,X);
 412         BODY_60_79(77,B,C,D,E,T,A,X);
 413         BODY_60_79(78,A,B,C,D,E,T,X);
 414         BODY_60_79(79,T,A,B,C,D,E,X);
 415
 416         c->h0=(c->h0+E)&0xffffffffL;
 417         c->h1=(c->h1+T)&0xffffffffL;
 418         c->h2=(c->h2+A)&0xffffffffL;
 419         c->h3=(c->h3+B)&0xffffffffL;
 420         c->h4=(c->h4+C)&0xffffffffL;
 421
 422         if (--num <= 0) break;
 423
 424         A=c->h0;
 425         B=c->h1;
 426         C=c->h2;
 427         D=c->h3;
 428         E=c->h4;
 429
 430         W+=SHA_LBLOCK;  /* Note! This can happen only when sizeof(SHA_LONG)
 431                          * is 4. Whenever it's not the actual case this
 432                          * function is never called with num larger than 1
 433                          * and we never advance down here.
 434                          *                      <appro@fy.chalmers.se>
 435                          */
 436                 }
 437         }
 438 #endif
 439
 440 void SHA1_Final(unsigned char *md, SHA_CTX *c)
 441         {
 442         register int i,j;
 443         register SHA_LONG l;
 444         register SHA_LONG *p;
 445         static unsigned char end[4]={0x80,0x00,0x00,0x00};
 446         unsigned char *cp=end;
 447
 448         /* c->num should definitly have room for at least one more byte. */
 449         p=c->data;
 450         j=c->num;
 451         i=j>>2;
 452 #ifdef PURIFY
 453         if ((j&0x03) == 0) p[i]=0;
 454 #endif
 455         l=p[i];
 456         M_p_c2nl(cp,l,j&0x03);
 457         p[i]=l;
 458         i++;
 459         /* i is the next 'undefined word' */
 460         if (c->num >= SHA_LAST_BLOCK)
 461                 {
 462                 for (; i<SHA_LBLOCK; i++)
 463                         p[i]=0;
 464                 sha1_block(c,p,1);
 465                 i=0;
 466                 }
 467         for (; i<(SHA_LBLOCK-2); i++)
 468                 p[i]=0;
 469         p[SHA_LBLOCK-2]=c->Nh;
 470         p[SHA_LBLOCK-1]=c->Nl;
 471 #if SHA_LONG_LOG2==2
 472 #if !defined(B_ENDIAN) && defined(SHA1_ASM)
 473         Endian_Reverse32(p[SHA_LBLOCK-2]);
 474         Endian_Reverse32(p[SHA_LBLOCK-1]);
 475 #endif
 476 #endif
 477         sha1_block(c,p,1);
 478         cp=md;
 479         l=c->h0; nl2c(l,cp);
 480         l=c->h1; nl2c(l,cp);
 481         l=c->h2; nl2c(l,cp);
 482         l=c->h3; nl2c(l,cp);
 483         l=c->h4; nl2c(l,cp);
 484
 485         c->num=0;
 486         /* sha_block may be leaving some stuff on the stack
 487          * but I'm not worried :-)
 488         memset((void *)c,0,sizeof(SHA_CTX));
 489          */
 490         }
 491 #endif
 492