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