sys/crypto/des/des_enc.c

   1 /*      $KAME: des_enc.c,v 1.1 2001/09/10 04:03:58 itojun Exp $ */
   2 /*      $FreeBSD: src/sys/crypto/des/des_enc.c,v 1.2 2004/06/14 00:38:54 obrien Exp $   */
   3
   4 /* crypto/des/des_enc.c */
   5
   6 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   7  * All rights reserved.
   8  *
   9  * This package is an SSL implementation written
  10  * by Eric Young (eay@cryptsoft.com).
  11  * The implementation was written so as to conform with Netscapes SSL.
  12  *
  13  * This library is free for commercial and non-commercial use as long as
  14  * the following conditions are aheared to.  The following conditions
  15  * apply to all code found in this distribution, be it the RC4, RSA,
  16  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  17  * included with this distribution is covered by the same copyright terms
  18  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  19  *
  20  * Copyright remains Eric Young's, and as such any Copyright notices in
  21  * the code are not to be removed.
  22  * If this package is used in a product, Eric Young should be given attribution
  23  * as the author of the parts of the library used.
  24  * This can be in the form of a textual message at program startup or
  25  * in documentation (online or textual) provided with the package.
  26  *
  27  * Redistribution and use in source and binary forms, with or without
  28  * modification, are permitted provided that the following conditions
  29  * are met:
  30  * 1. Redistributions of source code must retain the copyright
  31  *    notice, this list of conditions and the following disclaimer.
  32  * 2. Redistributions in binary form must reproduce the above copyright
  33  *    notice, this list of conditions and the following disclaimer in the
  34  *    documentation and/or other materials provided with the distribution.
  35  * 3. All advertising materials mentioning features or use of this software
  36  *    must display the following acknowledgement:
  37  *    "This product includes cryptographic software written by
  38  *     Eric Young (eay@cryptsoft.com)"
  39  *    The word 'cryptographic' can be left out if the rouines from the library
  40  *    being used are not cryptographic related :-).
  41  * 4. If you include any Windows specific code (or a derivative thereof) from
  42  *    the apps directory (application code) you must include an acknowledgement:
  43  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  44  *
  45  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  46  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  47  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  48  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  49  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  50  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  51  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  52  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  53  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  54  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  55  * SUCH DAMAGE.
  56  *
  57  * The licence and distribution terms for any publically available version or
  58  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  59  * copied and put under another distribution licence
  60  * [including the GNU Public Licence.]
  61  */
  62
  63 #include <sys/types.h>
  64 #include <crypto/des/des_locl.h>
  65
  66 extern  const DES_LONG des_SPtrans[8][64];
  67
  68 void des_encrypt1(DES_LONG *data, des_key_schedule ks, int enc)
  69 {
  70         DES_LONG l,r,t,u;
  71 #ifdef DES_PTR
  72         const unsigned char *des_SP=(const unsigned char *)des_SPtrans;
  73 #endif
  74 #ifndef DES_UNROLL
  75         int i;
  76 #endif
  77         DES_LONG *s;
  78
  79         r=data[0];
  80         l=data[1];
  81
  82         IP(r,l);
  83         /* Things have been modified so that the initial rotate is
  84          * done outside the loop.  This required the
  85          * des_SPtrans values in sp.h to be rotated 1 bit to the right.
  86          * One perl script later and things have a 5% speed up on a sparc2.
  87          * Thanks to Richard Outerbridge <71755.204@CompuServe.COM>
  88          * for pointing this out. */
  89         /* clear the top bits on machines with 8byte longs */
  90         /* shift left by 2 */
  91         r=ROTATE(r,29)&0xffffffffL;
  92         l=ROTATE(l,29)&0xffffffffL;
  93
  94         s=ks->ks.deslong;
  95         /* I don't know if it is worth the effort of loop unrolling the
  96          * inner loop */
  97         if (enc)
  98                 {
  99 #ifdef DES_UNROLL
 100                 D_ENCRYPT(l,r, 0); /*  1 */
 101                 D_ENCRYPT(r,l, 2); /*  2 */
 102                 D_ENCRYPT(l,r, 4); /*  3 */
 103                 D_ENCRYPT(r,l, 6); /*  4 */
 104                 D_ENCRYPT(l,r, 8); /*  5 */
 105                 D_ENCRYPT(r,l,10); /*  6 */
 106                 D_ENCRYPT(l,r,12); /*  7 */
 107                 D_ENCRYPT(r,l,14); /*  8 */
 108                 D_ENCRYPT(l,r,16); /*  9 */
 109                 D_ENCRYPT(r,l,18); /*  10 */
 110                 D_ENCRYPT(l,r,20); /*  11 */
 111                 D_ENCRYPT(r,l,22); /*  12 */
 112                 D_ENCRYPT(l,r,24); /*  13 */
 113                 D_ENCRYPT(r,l,26); /*  14 */
 114                 D_ENCRYPT(l,r,28); /*  15 */
 115                 D_ENCRYPT(r,l,30); /*  16 */
 116 #else
 117                 for (i=0; i<32; i+=8)
 118                         {
 119                         D_ENCRYPT(l,r,i+0); /*  1 */
 120                         D_ENCRYPT(r,l,i+2); /*  2 */
 121                         D_ENCRYPT(l,r,i+4); /*  3 */
 122                         D_ENCRYPT(r,l,i+6); /*  4 */
 123                         }
 124 #endif
 125                 }
 126         else
 127                 {
 128 #ifdef DES_UNROLL
 129                 D_ENCRYPT(l,r,30); /* 16 */
 130                 D_ENCRYPT(r,l,28); /* 15 */
 131                 D_ENCRYPT(l,r,26); /* 14 */
 132                 D_ENCRYPT(r,l,24); /* 13 */
 133                 D_ENCRYPT(l,r,22); /* 12 */
 134                 D_ENCRYPT(r,l,20); /* 11 */
 135                 D_ENCRYPT(l,r,18); /* 10 */
 136                 D_ENCRYPT(r,l,16); /*  9 */
 137                 D_ENCRYPT(l,r,14); /*  8 */
 138                 D_ENCRYPT(r,l,12); /*  7 */
 139                 D_ENCRYPT(l,r,10); /*  6 */
 140                 D_ENCRYPT(r,l, 8); /*  5 */
 141                 D_ENCRYPT(l,r, 6); /*  4 */
 142                 D_ENCRYPT(r,l, 4); /*  3 */
 143                 D_ENCRYPT(l,r, 2); /*  2 */
 144                 D_ENCRYPT(r,l, 0); /*  1 */
 145 #else
 146                 for (i=30; i>0; i-=8)
 147                         {
 148                         D_ENCRYPT(l,r,i-0); /* 16 */
 149                         D_ENCRYPT(r,l,i-2); /* 15 */
 150                         D_ENCRYPT(l,r,i-4); /* 14 */
 151                         D_ENCRYPT(r,l,i-6); /* 13 */
 152                         }
 153 #endif
 154                 }
 155
 156         /* rotate and clear the top bits on machines with 8byte longs */
 157         l=ROTATE(l,3)&0xffffffffL;
 158         r=ROTATE(r,3)&0xffffffffL;
 159
 160         FP(r,l);
 161         data[0]=l;
 162         data[1]=r;
 163         l=r=t=u=0;
 164 }
 165
 166 void des_encrypt2(DES_LONG *data, des_key_schedule ks, int enc)
 167 {
 168         DES_LONG l,r,t,u;
 169 #ifdef DES_PTR
 170         const unsigned char *des_SP=(const unsigned char *)des_SPtrans;
 171 #endif
 172 #ifndef DES_UNROLL
 173         int i;
 174 #endif
 175         DES_LONG *s;
 176
 177         r=data[0];
 178         l=data[1];
 179
 180         /* Things have been modified so that the initial rotate is
 181          * done outside the loop.  This required the
 182          * des_SPtrans values in sp.h to be rotated 1 bit to the right.
 183          * One perl script later and things have a 5% speed up on a sparc2.
 184          * Thanks to Richard Outerbridge <71755.204@CompuServe.COM>
 185          * for pointing this out. */
 186         /* clear the top bits on machines with 8byte longs */
 187         r=ROTATE(r,29)&0xffffffffL;
 188         l=ROTATE(l,29)&0xffffffffL;
 189
 190         s=ks->ks.deslong;
 191         /* I don't know if it is worth the effort of loop unrolling the
 192          * inner loop */
 193         if (enc)
 194                 {
 195 #ifdef DES_UNROLL
 196                 D_ENCRYPT(l,r, 0); /*  1 */
 197                 D_ENCRYPT(r,l, 2); /*  2 */
 198                 D_ENCRYPT(l,r, 4); /*  3 */
 199                 D_ENCRYPT(r,l, 6); /*  4 */
 200                 D_ENCRYPT(l,r, 8); /*  5 */
 201                 D_ENCRYPT(r,l,10); /*  6 */
 202                 D_ENCRYPT(l,r,12); /*  7 */
 203                 D_ENCRYPT(r,l,14); /*  8 */
 204                 D_ENCRYPT(l,r,16); /*  9 */
 205                 D_ENCRYPT(r,l,18); /*  10 */
 206                 D_ENCRYPT(l,r,20); /*  11 */
 207                 D_ENCRYPT(r,l,22); /*  12 */
 208                 D_ENCRYPT(l,r,24); /*  13 */
 209                 D_ENCRYPT(r,l,26); /*  14 */
 210                 D_ENCRYPT(l,r,28); /*  15 */
 211                 D_ENCRYPT(r,l,30); /*  16 */
 212 #else
 213                 for (i=0; i<32; i+=8)
 214                         {
 215                         D_ENCRYPT(l,r,i+0); /*  1 */
 216                         D_ENCRYPT(r,l,i+2); /*  2 */
 217                         D_ENCRYPT(l,r,i+4); /*  3 */
 218                         D_ENCRYPT(r,l,i+6); /*  4 */
 219                         }
 220 #endif
 221                 }
 222         else
 223                 {
 224 #ifdef DES_UNROLL
 225                 D_ENCRYPT(l,r,30); /* 16 */
 226                 D_ENCRYPT(r,l,28); /* 15 */
 227                 D_ENCRYPT(l,r,26); /* 14 */
 228                 D_ENCRYPT(r,l,24); /* 13 */
 229                 D_ENCRYPT(l,r,22); /* 12 */
 230                 D_ENCRYPT(r,l,20); /* 11 */
 231                 D_ENCRYPT(l,r,18); /* 10 */
 232                 D_ENCRYPT(r,l,16); /*  9 */
 233                 D_ENCRYPT(l,r,14); /*  8 */
 234                 D_ENCRYPT(r,l,12); /*  7 */
 235                 D_ENCRYPT(l,r,10); /*  6 */
 236                 D_ENCRYPT(r,l, 8); /*  5 */
 237                 D_ENCRYPT(l,r, 6); /*  4 */
 238                 D_ENCRYPT(r,l, 4); /*  3 */
 239                 D_ENCRYPT(l,r, 2); /*  2 */
 240                 D_ENCRYPT(r,l, 0); /*  1 */
 241 #else
 242                 for (i=30; i>0; i-=8)
 243                         {
 244                         D_ENCRYPT(l,r,i-0); /* 16 */
 245                         D_ENCRYPT(r,l,i-2); /* 15 */
 246                         D_ENCRYPT(l,r,i-4); /* 14 */
 247                         D_ENCRYPT(r,l,i-6); /* 13 */
 248                         }
 249 #endif
 250                 }
 251         /* rotate and clear the top bits on machines with 8byte longs */
 252         data[0]=ROTATE(l,3)&0xffffffffL;
 253         data[1]=ROTATE(r,3)&0xffffffffL;
 254         l=r=t=u=0;
 255 }
 256
 257 void des_encrypt3(DES_LONG *data, des_key_schedule ks1, des_key_schedule ks2,
 258              des_key_schedule ks3)
 259 {
 260         DES_LONG l,r;
 261
 262         l=data[0];
 263         r=data[1];
 264         IP(l,r);
 265         data[0]=l;
 266         data[1]=r;
 267         des_encrypt2((DES_LONG *)data,ks1,DES_ENCRYPT);
 268         des_encrypt2((DES_LONG *)data,ks2,DES_DECRYPT);
 269         des_encrypt2((DES_LONG *)data,ks3,DES_ENCRYPT);
 270         l=data[0];
 271         r=data[1];
 272         FP(r,l);
 273         data[0]=l;
 274         data[1]=r;
 275 }
 276
 277 void des_decrypt3(DES_LONG *data, des_key_schedule ks1, des_key_schedule ks2,
 278              des_key_schedule ks3)
 279 {
 280         DES_LONG l,r;
 281
 282         l=data[0];
 283         r=data[1];
 284         IP(l,r);
 285         data[0]=l;
 286         data[1]=r;
 287         des_encrypt2((DES_LONG *)data,ks3,DES_DECRYPT);
 288         des_encrypt2((DES_LONG *)data,ks2,DES_ENCRYPT);
 289         des_encrypt2((DES_LONG *)data,ks1,DES_DECRYPT);
 290         l=data[0];
 291         r=data[1];
 292         FP(r,l);
 293         data[0]=l;
 294         data[1]=r;
 295 }