lib/libcrypto/des/des_enc.c

   1 /* $OpenBSD: des_enc.c,v 1.12 2014/10/28 07:35:58 jsg Exp $ */
   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 #include "spr.h"
  61
  62 #ifndef OPENBSD_DES_ASM
  63
  64 void DES_encrypt1(DES_LONG *data, DES_key_schedule *ks, int enc)
  65         {
  66         DES_LONG l,r,t,u;
  67 #ifdef DES_PTR
  68         const unsigned char *des_SP=(const unsigned char *)DES_SPtrans;
  69 #endif
  70 #ifndef DES_UNROLL
  71         int i;
  72 #endif
  73         DES_LONG *s;
  74
  75         r=data[0];
  76         l=data[1];
  77
  78         IP(r,l);
  79         /* Things have been modified so that the initial rotate is
  80          * done outside the loop.  This required the
  81          * DES_SPtrans values in sp.h to be rotated 1 bit to the right.
  82          * One perl script later and things have a 5% speed up on a sparc2.
  83          * Thanks to Richard Outerbridge <71755.204@CompuServe.COM>
  84          * for pointing this out. */
  85         /* clear the top bits on machines with 8byte longs */
  86         /* shift left by 2 */
  87         r=ROTATE(r,29)&0xffffffffL;
  88         l=ROTATE(l,29)&0xffffffffL;
  89
  90         s=ks->ks->deslong;
  91         /* I don't know if it is worth the effort of loop unrolling the
  92          * inner loop */
  93         if (enc)
  94                 {
  95 #ifdef DES_UNROLL
  96                 D_ENCRYPT(l,r, 0); /*  1 */
  97                 D_ENCRYPT(r,l, 2); /*  2 */
  98                 D_ENCRYPT(l,r, 4); /*  3 */
  99                 D_ENCRYPT(r,l, 6); /*  4 */
 100                 D_ENCRYPT(l,r, 8); /*  5 */
 101                 D_ENCRYPT(r,l,10); /*  6 */
 102                 D_ENCRYPT(l,r,12); /*  7 */
 103                 D_ENCRYPT(r,l,14); /*  8 */
 104                 D_ENCRYPT(l,r,16); /*  9 */
 105                 D_ENCRYPT(r,l,18); /*  10 */
 106                 D_ENCRYPT(l,r,20); /*  11 */
 107                 D_ENCRYPT(r,l,22); /*  12 */
 108                 D_ENCRYPT(l,r,24); /*  13 */
 109                 D_ENCRYPT(r,l,26); /*  14 */
 110                 D_ENCRYPT(l,r,28); /*  15 */
 111                 D_ENCRYPT(r,l,30); /*  16 */
 112 #else
 113                 for (i=0; i<32; i+=4)
 114                         {
 115                         D_ENCRYPT(l,r,i+0); /*  1 */
 116                         D_ENCRYPT(r,l,i+2); /*  2 */
 117                         }
 118 #endif
 119                 }
 120         else
 121                 {
 122 #ifdef DES_UNROLL
 123                 D_ENCRYPT(l,r,30); /* 16 */
 124                 D_ENCRYPT(r,l,28); /* 15 */
 125                 D_ENCRYPT(l,r,26); /* 14 */
 126                 D_ENCRYPT(r,l,24); /* 13 */
 127                 D_ENCRYPT(l,r,22); /* 12 */
 128                 D_ENCRYPT(r,l,20); /* 11 */
 129                 D_ENCRYPT(l,r,18); /* 10 */
 130                 D_ENCRYPT(r,l,16); /*  9 */
 131                 D_ENCRYPT(l,r,14); /*  8 */
 132                 D_ENCRYPT(r,l,12); /*  7 */
 133                 D_ENCRYPT(l,r,10); /*  6 */
 134                 D_ENCRYPT(r,l, 8); /*  5 */
 135                 D_ENCRYPT(l,r, 6); /*  4 */
 136                 D_ENCRYPT(r,l, 4); /*  3 */
 137                 D_ENCRYPT(l,r, 2); /*  2 */
 138                 D_ENCRYPT(r,l, 0); /*  1 */
 139 #else
 140                 for (i=30; i>0; i-=4)
 141                         {
 142                         D_ENCRYPT(l,r,i-0); /* 16 */
 143                         D_ENCRYPT(r,l,i-2); /* 15 */
 144                         }
 145 #endif
 146                 }
 147
 148         /* rotate and clear the top bits on machines with 8byte longs */
 149         l=ROTATE(l,3)&0xffffffffL;
 150         r=ROTATE(r,3)&0xffffffffL;
 151
 152         FP(r,l);
 153         data[0]=l;
 154         data[1]=r;
 155         l=r=t=u=0;
 156         }
 157
 158 void DES_encrypt2(DES_LONG *data, DES_key_schedule *ks, int enc)
 159         {
 160         DES_LONG l,r,t,u;
 161 #ifdef DES_PTR
 162         const unsigned char *des_SP=(const unsigned char *)DES_SPtrans;
 163 #endif
 164 #ifndef DES_UNROLL
 165         int i;
 166 #endif
 167         DES_LONG *s;
 168
 169         r=data[0];
 170         l=data[1];
 171
 172         /* Things have been modified so that the initial rotate is
 173          * done outside the loop.  This required the
 174          * DES_SPtrans values in sp.h to be rotated 1 bit to the right.
 175          * One perl script later and things have a 5% speed up on a sparc2.
 176          * Thanks to Richard Outerbridge <71755.204@CompuServe.COM>
 177          * for pointing this out. */
 178         /* clear the top bits on machines with 8byte longs */
 179         r=ROTATE(r,29)&0xffffffffL;
 180         l=ROTATE(l,29)&0xffffffffL;
 181
 182         s=ks->ks->deslong;
 183         /* I don't know if it is worth the effort of loop unrolling the
 184          * inner loop */
 185         if (enc)
 186                 {
 187 #ifdef DES_UNROLL
 188                 D_ENCRYPT(l,r, 0); /*  1 */
 189                 D_ENCRYPT(r,l, 2); /*  2 */
 190                 D_ENCRYPT(l,r, 4); /*  3 */
 191                 D_ENCRYPT(r,l, 6); /*  4 */
 192                 D_ENCRYPT(l,r, 8); /*  5 */
 193                 D_ENCRYPT(r,l,10); /*  6 */
 194                 D_ENCRYPT(l,r,12); /*  7 */
 195                 D_ENCRYPT(r,l,14); /*  8 */
 196                 D_ENCRYPT(l,r,16); /*  9 */
 197                 D_ENCRYPT(r,l,18); /*  10 */
 198                 D_ENCRYPT(l,r,20); /*  11 */
 199                 D_ENCRYPT(r,l,22); /*  12 */
 200                 D_ENCRYPT(l,r,24); /*  13 */
 201                 D_ENCRYPT(r,l,26); /*  14 */
 202                 D_ENCRYPT(l,r,28); /*  15 */
 203                 D_ENCRYPT(r,l,30); /*  16 */
 204 #else
 205                 for (i=0; i<32; i+=4)
 206                         {
 207                         D_ENCRYPT(l,r,i+0); /*  1 */
 208                         D_ENCRYPT(r,l,i+2); /*  2 */
 209                         }
 210 #endif
 211                 }
 212         else
 213                 {
 214 #ifdef DES_UNROLL
 215                 D_ENCRYPT(l,r,30); /* 16 */
 216                 D_ENCRYPT(r,l,28); /* 15 */
 217                 D_ENCRYPT(l,r,26); /* 14 */
 218                 D_ENCRYPT(r,l,24); /* 13 */
 219                 D_ENCRYPT(l,r,22); /* 12 */
 220                 D_ENCRYPT(r,l,20); /* 11 */
 221                 D_ENCRYPT(l,r,18); /* 10 */
 222                 D_ENCRYPT(r,l,16); /*  9 */
 223                 D_ENCRYPT(l,r,14); /*  8 */
 224                 D_ENCRYPT(r,l,12); /*  7 */
 225                 D_ENCRYPT(l,r,10); /*  6 */
 226                 D_ENCRYPT(r,l, 8); /*  5 */
 227                 D_ENCRYPT(l,r, 6); /*  4 */
 228                 D_ENCRYPT(r,l, 4); /*  3 */
 229                 D_ENCRYPT(l,r, 2); /*  2 */
 230                 D_ENCRYPT(r,l, 0); /*  1 */
 231 #else
 232                 for (i=30; i>0; i-=4)
 233                         {
 234                         D_ENCRYPT(l,r,i-0); /* 16 */
 235                         D_ENCRYPT(r,l,i-2); /* 15 */
 236                         }
 237 #endif
 238                 }
 239         /* rotate and clear the top bits on machines with 8byte longs */
 240         data[0]=ROTATE(l,3)&0xffffffffL;
 241         data[1]=ROTATE(r,3)&0xffffffffL;
 242         l=r=t=u=0;
 243         }
 244
 245 #endif /* OPENBSD_DES_ASM */
 246
 247 void DES_encrypt3(DES_LONG *data, DES_key_schedule *ks1,
 248                   DES_key_schedule *ks2, DES_key_schedule *ks3)
 249         {
 250         DES_LONG l,r;
 251
 252         l=data[0];
 253         r=data[1];
 254         IP(l,r);
 255         data[0]=l;
 256         data[1]=r;
 257         DES_encrypt2((DES_LONG *)data,ks1,DES_ENCRYPT);
 258         DES_encrypt2((DES_LONG *)data,ks2,DES_DECRYPT);
 259         DES_encrypt2((DES_LONG *)data,ks3,DES_ENCRYPT);
 260         l=data[0];
 261         r=data[1];
 262         FP(r,l);
 263         data[0]=l;
 264         data[1]=r;
 265         }
 266
 267 void DES_decrypt3(DES_LONG *data, DES_key_schedule *ks1,
 268                   DES_key_schedule *ks2, DES_key_schedule *ks3)
 269         {
 270         DES_LONG l,r;
 271
 272         l=data[0];
 273         r=data[1];
 274         IP(l,r);
 275         data[0]=l;
 276         data[1]=r;
 277         DES_encrypt2((DES_LONG *)data,ks3,DES_DECRYPT);
 278         DES_encrypt2((DES_LONG *)data,ks2,DES_ENCRYPT);
 279         DES_encrypt2((DES_LONG *)data,ks1,DES_DECRYPT);
 280         l=data[0];
 281         r=data[1];
 282         FP(r,l);
 283         data[0]=l;
 284         data[1]=r;
 285         }
 286
 287 #ifndef DES_DEFAULT_OPTIONS
 288
 289 #undef CBC_ENC_C__DONT_UPDATE_IV
 290 #include "ncbc_enc.c" /* DES_ncbc_encrypt */
 291
 292 void DES_ede3_cbc_encrypt(const unsigned char *input, unsigned char *output,
 293                           long length, DES_key_schedule *ks1,
 294                           DES_key_schedule *ks2, DES_key_schedule *ks3,
 295                           DES_cblock *ivec, int enc)
 296         {
 297         DES_LONG tin0,tin1;
 298         DES_LONG tout0,tout1,xor0,xor1;
 299         const unsigned char *in;
 300         unsigned char *out;
 301         long l=length;
 302         DES_LONG tin[2];
 303         unsigned char *iv;
 304
 305         in=input;
 306         out=output;
 307         iv = &(*ivec)[0];
 308
 309         if (enc)
 310                 {
 311                 c2l(iv,tout0);
 312                 c2l(iv,tout1);
 313                 for (l-=8; l>=0; l-=8)
 314                         {
 315                         c2l(in,tin0);
 316                         c2l(in,tin1);
 317                         tin0^=tout0;
 318                         tin1^=tout1;
 319
 320                         tin[0]=tin0;
 321                         tin[1]=tin1;
 322                         DES_encrypt3((DES_LONG *)tin,ks1,ks2,ks3);
 323                         tout0=tin[0];
 324                         tout1=tin[1];
 325
 326                         l2c(tout0,out);
 327                         l2c(tout1,out);
 328                         }
 329                 if (l != -8)
 330                         {
 331                         c2ln(in,tin0,tin1,l+8);
 332                         tin0^=tout0;
 333                         tin1^=tout1;
 334
 335                         tin[0]=tin0;
 336                         tin[1]=tin1;
 337                         DES_encrypt3((DES_LONG *)tin,ks1,ks2,ks3);
 338                         tout0=tin[0];
 339                         tout1=tin[1];
 340
 341                         l2c(tout0,out);
 342                         l2c(tout1,out);
 343                         }
 344                 iv = &(*ivec)[0];
 345                 l2c(tout0,iv);
 346                 l2c(tout1,iv);
 347                 }
 348         else
 349                 {
 350                 DES_LONG t0,t1;
 351
 352                 c2l(iv,xor0);
 353                 c2l(iv,xor1);
 354                 for (l-=8; l>=0; l-=8)
 355                         {
 356                         c2l(in,tin0);
 357                         c2l(in,tin1);
 358
 359                         t0=tin0;
 360                         t1=tin1;
 361
 362                         tin[0]=tin0;
 363                         tin[1]=tin1;
 364                         DES_decrypt3((DES_LONG *)tin,ks1,ks2,ks3);
 365                         tout0=tin[0];
 366                         tout1=tin[1];
 367
 368                         tout0^=xor0;
 369                         tout1^=xor1;
 370                         l2c(tout0,out);
 371                         l2c(tout1,out);
 372                         xor0=t0;
 373                         xor1=t1;
 374                         }
 375                 if (l != -8)
 376                         {
 377                         c2l(in,tin0);
 378                         c2l(in,tin1);
 379
 380                         t0=tin0;
 381                         t1=tin1;
 382
 383                         tin[0]=tin0;
 384                         tin[1]=tin1;
 385                         DES_decrypt3((DES_LONG *)tin,ks1,ks2,ks3);
 386                         tout0=tin[0];
 387                         tout1=tin[1];
 388
 389                         tout0^=xor0;
 390                         tout1^=xor1;
 391                         l2cn(tout0,tout1,out,l+8);
 392                         xor0=t0;
 393                         xor1=t1;
 394                         }
 395
 396                 iv = &(*ivec)[0];
 397                 l2c(xor0,iv);
 398                 l2c(xor1,iv);
 399                 }
 400         tin0=tin1=tout0=tout1=xor0=xor1=0;
 401         tin[0]=tin[1]=0;
 402         }
 403
 404 #endif /* DES_DEFAULT_OPTIONS */