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