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