crypto/openssl-0.9.7e/crypto/des/des_enc.c

   1 /* crypto/des/des_enc.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 "des_locl.h"
  60
  61 #ifndef OPENSSL_FIPS
  62
  63 void DES_encrypt1(DES_LONG *data, DES_key_schedule *ks, int enc)
  64         {
  65         register DES_LONG l,r,t,u;
  66 #ifdef DES_PTR
  67         register const unsigned char *des_SP=(const unsigned char *)DES_SPtrans;
  68 #endif
  69 #ifndef DES_UNROLL
  70         register int i;
  71 #endif
  72         register DES_LONG *s;
  73
  74         r=data[0];
  75         l=data[1];
  76
  77         IP(r,l);
  78         /* Things have been modified so that the initial rotate is
  79          * done outside the loop.  This required the
  80          * DES_SPtrans values in sp.h to be rotated 1 bit to the right.
  81          * One perl script later and things have a 5% speed up on a sparc2.
  82          * Thanks to Richard Outerbridge <71755.204@CompuServe.COM>
  83          * for pointing this out. */
  84         /* clear the top bits on machines with 8byte longs */
  85         /* shift left by 2 */
  86         r=ROTATE(r,29)&0xffffffffL;
  87         l=ROTATE(l,29)&0xffffffffL;
  88
  89         s=ks->ks->deslong;
  90         /* I don't know if it is worth the effort of loop unrolling the
  91          * inner loop */
  92         if (enc)
  93                 {
  94 #ifdef DES_UNROLL
  95                 D_ENCRYPT(l,r, 0); /*  1 */
  96                 D_ENCRYPT(r,l, 2); /*  2 */
  97                 D_ENCRYPT(l,r, 4); /*  3 */
  98                 D_ENCRYPT(r,l, 6); /*  4 */
  99                 D_ENCRYPT(l,r, 8); /*  5 */
 100                 D_ENCRYPT(r,l,10); /*  6 */
 101                 D_ENCRYPT(l,r,12); /*  7 */
 102                 D_ENCRYPT(r,l,14); /*  8 */
 103                 D_ENCRYPT(l,r,16); /*  9 */
 104                 D_ENCRYPT(r,l,18); /*  10 */
 105                 D_ENCRYPT(l,r,20); /*  11 */
 106                 D_ENCRYPT(r,l,22); /*  12 */
 107                 D_ENCRYPT(l,r,24); /*  13 */
 108                 D_ENCRYPT(r,l,26); /*  14 */
 109                 D_ENCRYPT(l,r,28); /*  15 */
 110                 D_ENCRYPT(r,l,30); /*  16 */
 111 #else
 112                 for (i=0; i<32; i+=8)
 113                         {
 114                         D_ENCRYPT(l,r,i+0); /*  1 */
 115                         D_ENCRYPT(r,l,i+2); /*  2 */
 116                         D_ENCRYPT(l,r,i+4); /*  3 */
 117                         D_ENCRYPT(r,l,i+6); /*  4 */
 118                         }
 119 #endif
 120                 }
 121         else
 122                 {
 123 #ifdef DES_UNROLL
 124                 D_ENCRYPT(l,r,30); /* 16 */
 125                 D_ENCRYPT(r,l,28); /* 15 */
 126                 D_ENCRYPT(l,r,26); /* 14 */
 127                 D_ENCRYPT(r,l,24); /* 13 */
 128                 D_ENCRYPT(l,r,22); /* 12 */
 129                 D_ENCRYPT(r,l,20); /* 11 */
 130                 D_ENCRYPT(l,r,18); /* 10 */
 131                 D_ENCRYPT(r,l,16); /*  9 */
 132                 D_ENCRYPT(l,r,14); /*  8 */
 133                 D_ENCRYPT(r,l,12); /*  7 */
 134                 D_ENCRYPT(l,r,10); /*  6 */
 135                 D_ENCRYPT(r,l, 8); /*  5 */
 136                 D_ENCRYPT(l,r, 6); /*  4 */
 137                 D_ENCRYPT(r,l, 4); /*  3 */
 138                 D_ENCRYPT(l,r, 2); /*  2 */
 139                 D_ENCRYPT(r,l, 0); /*  1 */
 140 #else
 141                 for (i=30; i>0; i-=8)
 142                         {
 143                         D_ENCRYPT(l,r,i-0); /* 16 */
 144                         D_ENCRYPT(r,l,i-2); /* 15 */
 145                         D_ENCRYPT(l,r,i-4); /* 14 */
 146                         D_ENCRYPT(r,l,i-6); /* 13 */
 147                         }
 148 #endif
 149                 }
 150
 151         /* rotate and clear the top bits on machines with 8byte longs */
 152         l=ROTATE(l,3)&0xffffffffL;
 153         r=ROTATE(r,3)&0xffffffffL;
 154
 155         FP(r,l);
 156         data[0]=l;
 157         data[1]=r;
 158         l=r=t=u=0;
 159         }
 160
 161 void DES_encrypt2(DES_LONG *data, DES_key_schedule *ks, int enc)
 162         {
 163         register DES_LONG l,r,t,u;
 164 #ifdef DES_PTR
 165         register const unsigned char *des_SP=(const unsigned char *)DES_SPtrans;
 166 #endif
 167 #ifndef DES_UNROLL
 168         register int i;
 169 #endif
 170         register DES_LONG *s;
 171
 172         r=data[0];
 173         l=data[1];
 174
 175         /* Things have been modified so that the initial rotate is
 176          * done outside the loop.  This required the
 177          * DES_SPtrans values in sp.h to be rotated 1 bit to the right.
 178          * One perl script later and things have a 5% speed up on a sparc2.
 179          * Thanks to Richard Outerbridge <71755.204@CompuServe.COM>
 180          * for pointing this out. */
 181         /* clear the top bits on machines with 8byte longs */
 182         r=ROTATE(r,29)&0xffffffffL;
 183         l=ROTATE(l,29)&0xffffffffL;
 184
 185         s=ks->ks->deslong;
 186         /* I don't know if it is worth the effort of loop unrolling the
 187          * inner loop */
 188         if (enc)
 189                 {
 190 #ifdef DES_UNROLL
 191                 D_ENCRYPT(l,r, 0); /*  1 */
 192                 D_ENCRYPT(r,l, 2); /*  2 */
 193                 D_ENCRYPT(l,r, 4); /*  3 */
 194                 D_ENCRYPT(r,l, 6); /*  4 */
 195                 D_ENCRYPT(l,r, 8); /*  5 */
 196                 D_ENCRYPT(r,l,10); /*  6 */
 197                 D_ENCRYPT(l,r,12); /*  7 */
 198                 D_ENCRYPT(r,l,14); /*  8 */
 199                 D_ENCRYPT(l,r,16); /*  9 */
 200                 D_ENCRYPT(r,l,18); /*  10 */
 201                 D_ENCRYPT(l,r,20); /*  11 */
 202                 D_ENCRYPT(r,l,22); /*  12 */
 203                 D_ENCRYPT(l,r,24); /*  13 */
 204                 D_ENCRYPT(r,l,26); /*  14 */
 205                 D_ENCRYPT(l,r,28); /*  15 */
 206                 D_ENCRYPT(r,l,30); /*  16 */
 207 #else
 208                 for (i=0; i<32; i+=8)
 209                         {
 210                         D_ENCRYPT(l,r,i+0); /*  1 */
 211                         D_ENCRYPT(r,l,i+2); /*  2 */
 212                         D_ENCRYPT(l,r,i+4); /*  3 */
 213                         D_ENCRYPT(r,l,i+6); /*  4 */
 214                         }
 215 #endif
 216                 }
 217         else
 218                 {
 219 #ifdef DES_UNROLL
 220                 D_ENCRYPT(l,r,30); /* 16 */
 221                 D_ENCRYPT(r,l,28); /* 15 */
 222                 D_ENCRYPT(l,r,26); /* 14 */
 223                 D_ENCRYPT(r,l,24); /* 13 */
 224                 D_ENCRYPT(l,r,22); /* 12 */
 225                 D_ENCRYPT(r,l,20); /* 11 */
 226                 D_ENCRYPT(l,r,18); /* 10 */
 227                 D_ENCRYPT(r,l,16); /*  9 */
 228                 D_ENCRYPT(l,r,14); /*  8 */
 229                 D_ENCRYPT(r,l,12); /*  7 */
 230                 D_ENCRYPT(l,r,10); /*  6 */
 231                 D_ENCRYPT(r,l, 8); /*  5 */
 232                 D_ENCRYPT(l,r, 6); /*  4 */
 233                 D_ENCRYPT(r,l, 4); /*  3 */
 234                 D_ENCRYPT(l,r, 2); /*  2 */
 235                 D_ENCRYPT(r,l, 0); /*  1 */
 236 #else
 237                 for (i=30; i>0; i-=8)
 238                         {
 239                         D_ENCRYPT(l,r,i-0); /* 16 */
 240                         D_ENCRYPT(r,l,i-2); /* 15 */
 241                         D_ENCRYPT(l,r,i-4); /* 14 */
 242                         D_ENCRYPT(r,l,i-6); /* 13 */
 243                         }
 244 #endif
 245                 }
 246         /* rotate and clear the top bits on machines with 8byte longs */
 247         data[0]=ROTATE(l,3)&0xffffffffL;
 248         data[1]=ROTATE(r,3)&0xffffffffL;
 249         l=r=t=u=0;
 250         }
 251
 252 void DES_encrypt3(DES_LONG *data, DES_key_schedule *ks1,
 253                   DES_key_schedule *ks2, DES_key_schedule *ks3)
 254         {
 255         register DES_LONG l,r;
 256
 257         l=data[0];
 258         r=data[1];
 259         IP(l,r);
 260         data[0]=l;
 261         data[1]=r;
 262         DES_encrypt2((DES_LONG *)data,ks1,DES_ENCRYPT);
 263         DES_encrypt2((DES_LONG *)data,ks2,DES_DECRYPT);
 264         DES_encrypt2((DES_LONG *)data,ks3,DES_ENCRYPT);
 265         l=data[0];
 266         r=data[1];
 267         FP(r,l);
 268         data[0]=l;
 269         data[1]=r;
 270         }
 271
 272 void DES_decrypt3(DES_LONG *data, DES_key_schedule *ks1,
 273                   DES_key_schedule *ks2, DES_key_schedule *ks3)
 274         {
 275         register DES_LONG l,r;
 276
 277         l=data[0];
 278         r=data[1];
 279         IP(l,r);
 280         data[0]=l;
 281         data[1]=r;
 282         DES_encrypt2((DES_LONG *)data,ks3,DES_DECRYPT);
 283         DES_encrypt2((DES_LONG *)data,ks2,DES_ENCRYPT);
 284         DES_encrypt2((DES_LONG *)data,ks1,DES_DECRYPT);
 285         l=data[0];
 286         r=data[1];
 287         FP(r,l);
 288         data[0]=l;
 289         data[1]=r;
 290         }
 291
 292 #endif /* ndef OPENSSL_FIPS */
 293
 294 #ifndef DES_DEFAULT_OPTIONS
 295
 296 #if !defined(OPENSSL_FIPS) || !defined(I386_ONLY)
 297
 298 #undef CBC_ENC_C__DONT_UPDATE_IV
 299 #include "ncbc_enc.c" /* DES_ncbc_encrypt */
 300
 301 void DES_ede3_cbc_encrypt(const unsigned char *input, unsigned char *output,
 302                           long length, DES_key_schedule *ks1,
 303                           DES_key_schedule *ks2, DES_key_schedule *ks3,
 304                           DES_cblock *ivec, int enc)
 305         {
 306         register DES_LONG tin0,tin1;
 307         register DES_LONG tout0,tout1,xor0,xor1;
 308         register const unsigned char *in;
 309         unsigned char *out;
 310         register long l=length;
 311         DES_LONG tin[2];
 312         unsigned char *iv;
 313
 314         in=input;
 315         out=output;
 316         iv = &(*ivec)[0];
 317
 318         if (enc)
 319                 {
 320                 c2l(iv,tout0);
 321                 c2l(iv,tout1);
 322                 for (l-=8; l>=0; l-=8)
 323                         {
 324                         c2l(in,tin0);
 325                         c2l(in,tin1);
 326                         tin0^=tout0;
 327                         tin1^=tout1;
 328
 329                         tin[0]=tin0;
 330                         tin[1]=tin1;
 331                         DES_encrypt3((DES_LONG *)tin,ks1,ks2,ks3);
 332                         tout0=tin[0];
 333                         tout1=tin[1];
 334
 335                         l2c(tout0,out);
 336                         l2c(tout1,out);
 337                         }
 338                 if (l != -8)
 339                         {
 340                         c2ln(in,tin0,tin1,l+8);
 341                         tin0^=tout0;
 342                         tin1^=tout1;
 343
 344                         tin[0]=tin0;
 345                         tin[1]=tin1;
 346                         DES_encrypt3((DES_LONG *)tin,ks1,ks2,ks3);
 347                         tout0=tin[0];
 348                         tout1=tin[1];
 349
 350                         l2c(tout0,out);
 351                         l2c(tout1,out);
 352                         }
 353                 iv = &(*ivec)[0];
 354                 l2c(tout0,iv);
 355                 l2c(tout1,iv);
 356                 }
 357         else
 358                 {
 359                 register DES_LONG t0,t1;
 360
 361                 c2l(iv,xor0);
 362                 c2l(iv,xor1);
 363                 for (l-=8; l>=0; l-=8)
 364                         {
 365                         c2l(in,tin0);
 366                         c2l(in,tin1);
 367
 368                         t0=tin0;
 369                         t1=tin1;
 370
 371                         tin[0]=tin0;
 372                         tin[1]=tin1;
 373                         DES_decrypt3((DES_LONG *)tin,ks1,ks2,ks3);
 374                         tout0=tin[0];
 375                         tout1=tin[1];
 376
 377                         tout0^=xor0;
 378                         tout1^=xor1;
 379                         l2c(tout0,out);
 380                         l2c(tout1,out);
 381                         xor0=t0;
 382                         xor1=t1;
 383                         }
 384                 if (l != -8)
 385                         {
 386                         c2l(in,tin0);
 387                         c2l(in,tin1);
 388
 389                         t0=tin0;
 390                         t1=tin1;
 391
 392                         tin[0]=tin0;
 393                         tin[1]=tin1;
 394                         DES_decrypt3((DES_LONG *)tin,ks1,ks2,ks3);
 395                         tout0=tin[0];
 396                         tout1=tin[1];
 397
 398                         tout0^=xor0;
 399                         tout1^=xor1;
 400                         l2cn(tout0,tout1,out,l+8);
 401                         xor0=t0;
 402                         xor1=t1;
 403                         }
 404
 405                 iv = &(*ivec)[0];
 406                 l2c(xor0,iv);
 407                 l2c(xor1,iv);
 408                 }
 409         tin0=tin1=tout0=tout1=xor0=xor1=0;
 410         tin[0]=tin[1]=0;
 411         }
 412
 413 #endif /* !defined(OPENSSL_FIPS) || !defined(I386_ONLY) */
 414
 415 #endif /* DES_DEFAULT_OPTIONS */