Line data    Source code

       1             : /*      $OpenBSD: ecb_enc.c,v 1.6 2015/12/10 21:00:51 naddy Exp $       */
       2             : 
       3             : /* lib/des/ecb_enc.c */
       4             : /* Copyright (C) 1995 Eric Young (eay@mincom.oz.au)
       5             :  * All rights reserved.
       6             :  * 
       7             :  * This file is part of an SSL implementation written
       8             :  * by Eric Young (eay@mincom.oz.au).
       9             :  * The implementation was written so as to conform with Netscapes SSL
      10             :  * specification.  This library and applications are
      11             :  * FREE FOR COMMERCIAL AND NON-COMMERCIAL USE
      12             :  * as long as the following conditions are aheared to.
      13             :  * 
      14             :  * Copyright remains Eric Young's, and as such any Copyright notices in
      15             :  * the code are not to be removed.  If this code is used in a product,
      16             :  * Eric Young should be given attribution as the author of the parts used.
      17             :  * This can be in the form of a textual message at program startup or
      18             :  * in documentation (online or textual) provided with the package.
      19             :  * 
      20             :  * Redistribution and use in source and binary forms, with or without
      21             :  * modification, are permitted provided that the following conditions
      22             :  * are met:
      23             :  * 1. Redistributions of source code must retain the copyright
      24             :  *    notice, this list of conditions and the following disclaimer.
      25             :  * 2. Redistributions in binary form must reproduce the above copyright
      26             :  *    notice, this list of conditions and the following disclaimer in the
      27             :  *    documentation and/or other materials provided with the distribution.
      28             :  * 3. All advertising materials mentioning features or use of this software
      29             :  *    must display the following acknowledgement:
      30             :  *    This product includes software developed by Eric Young (eay@mincom.oz.au)
      31             :  * 
      32             :  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
      33             :  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
      34             :  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
      35             :  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
      36             :  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
      37             :  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
      38             :  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
      39             :  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
      40             :  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
      41             :  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
      42             :  * SUCH DAMAGE.
      43             :  * 
      44             :  * The licence and distribution terms for any publically available version or
      45             :  * derivative of this code cannot be changed.  i.e. this code cannot simply be
      46             :  * copied and put under another distribution licence
      47             :  * [including the GNU Public Licence.]
      48             :  */
      49             : 
      50             : #include "des_locl.h"
      51             : #include "spr.h"
      52             : 
      53             : void
      54           0 : des_encrypt2(u_int32_t *data, des_key_schedule ks, int encrypt)
      55             : {
      56             :         register u_int32_t l, r, t, u;
      57             : #ifdef DES_USE_PTR
      58             :         register unsigned char *des_SP=(unsigned char *)des_SPtrans;
      59             : #endif
      60             :         register int i;
      61             :         register u_int32_t *s;
      62             : 
      63           0 :         u = data[0];
      64           0 :         r = data[1];
      65             : 
      66             :         /* Things have been modified so that the initial rotate is
      67             :          * done outside the loop.  This required the
      68             :          * des_SPtrans values in sp.h to be rotated 1 bit to the right.
      69             :          * One perl script later and things have a 5% speed up on a sparc2.
      70             :          * Thanks to Richard Outerbridge <71755.204@CompuServe.COM>
      71             :          * for pointing this out. */
      72           0 :         l = (r << 1) | (r >> 31);
      73           0 :         r = (u << 1) | (u >> 31);
      74             : 
      75             :         /* clear the top bits on machines with 8byte longs */
      76           0 :         l &= 0xffffffffL;
      77           0 :         r &= 0xffffffffL;
      78             : 
      79           0 :         s = (u_int32_t *) ks;
      80             :         /* I don't know if it is worth the effort of loop unrolling the
      81             :          * inner loop */
      82           0 :         if (encrypt) {
      83           0 :                 for (i = 0; i < 32; i += 4) {
      84           0 :                         D_ENCRYPT(l, r, i + 0); /*  1 */
      85           0 :                         D_ENCRYPT(r, l, i + 2); /*  2 */
      86             :                 }
      87             :         } else {
      88           0 :                 for (i = 30; i > 0; i -= 4) {
      89           0 :                         D_ENCRYPT(l, r, i - 0); /* 16 */
      90           0 :                         D_ENCRYPT(r, l, i - 2); /* 15 */
      91             :                 }
      92             :         }
      93           0 :         l = (l >> 1) | (l << 31);
      94           0 :         r = (r >> 1) | (r << 31);
      95             :         /* clear the top bits on machines with 8byte longs */
      96           0 :         l &= 0xffffffffL;
      97           0 :         r &= 0xffffffffL;
      98             : 
      99           0 :         data[0] = l;
     100           0 :         data[1] = r;
     101             :         l = r = t = u = 0;
     102           0 : }