crypt/crypt.c

   1 /*
   2  * UFC-crypt: ultra fast crypt(3) implementation
   3  *
   4  * Copyright (C) 1991, 1992, 1993, 1996 Free Software Foundation, Inc.
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; see the file COPYING.LIB.  If not,
  18  * write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19  * Boston, MA 02111-1307, USA.
  20  *
  21  * @(#)crypt.c  2.25 12/20/96
  22  *
  23  * Semiportable C version
  24  *
  25  */
  26
  27 #include "ufc-crypt.h"
  28 #include "crypt.h"
  29 #include "crypt-private.h"
  30
  31 #ifdef _UFC_32_
  32
  33 /*
  34  * 32 bit version
  35  */
  36
  37 #define SBA(sb, v) (*(long32*)((char*)(sb)+(v)))
  38
  39 void
  40 _ufc_doit_r(itr, __data, res)
  41      ufc_long itr, *res;
  42      struct crypt_data * __restrict __data;
  43 {
  44   int i;
  45   long32 s, *k;
  46   long32 *sb01 = (long32*)__data->sb0;
  47   long32 *sb23 = (long32*)__data->sb2;
  48   long32 l1, l2, r1, r2;
  49
  50   l1 = (long32)res[0]; l2 = (long32)res[1];
  51   r1 = (long32)res[2]; r2 = (long32)res[3];
  52
  53   while(itr--) {
  54     k = (long32*)__data->keysched;
  55     for(i=8; i--; ) {
  56       s = *k++ ^ r1;
  57       l1 ^= SBA(sb01, s & 0xffff); l2 ^= SBA(sb01, (s & 0xffff)+4);
  58       l1 ^= SBA(sb01, s >>= 16  ); l2 ^= SBA(sb01, (s         )+4);
  59       s = *k++ ^ r2;
  60       l1 ^= SBA(sb23, s & 0xffff); l2 ^= SBA(sb23, (s & 0xffff)+4);
  61       l1 ^= SBA(sb23, s >>= 16  ); l2 ^= SBA(sb23, (s         )+4);
  62
  63       s = *k++ ^ l1;
  64       r1 ^= SBA(sb01, s & 0xffff); r2 ^= SBA(sb01, (s & 0xffff)+4);
  65       r1 ^= SBA(sb01, s >>= 16  ); r2 ^= SBA(sb01, (s         )+4);
  66       s = *k++ ^ l2;
  67       r1 ^= SBA(sb23, s & 0xffff); r2 ^= SBA(sb23, (s & 0xffff)+4);
  68       r1 ^= SBA(sb23, s >>= 16  ); r2 ^= SBA(sb23, (s         )+4);
  69     }
  70     s=l1; l1=r1; r1=s; s=l2; l2=r2; r2=s;
  71   }
  72   res[0] = l1; res[1] = l2; res[2] = r1; res[3] = r2;
  73 }
  74
  75 #endif
  76
  77 #ifdef _UFC_64_
  78
  79 /*
  80  * 64 bit version
  81  */
  82
  83 #define SBA(sb, v) (*(long64*)((char*)(sb)+(v)))
  84
  85 void
  86 _ufc_doit_r(itr, __data, res)
  87      ufc_long itr, *res;
  88      struct crypt_data * __restrict __data;
  89 {
  90   int i;
  91   long64 l, r, s, *k;
  92   register long64 *sb01 = (long64*)__data->sb0;
  93   register long64 *sb23 = (long64*)__data->sb2;
  94
  95   l = (((long64)res[0]) << 32) | ((long64)res[1]);
  96   r = (((long64)res[2]) << 32) | ((long64)res[3]);
  97
  98   while(itr--) {
  99     k = (long64*)__data->keysched;
 100     for(i=8; i--; ) {
 101       s = *k++ ^ r;
 102       l ^= SBA(sb23, (s       ) & 0xffff);
 103       l ^= SBA(sb23, (s >>= 16) & 0xffff);
 104       l ^= SBA(sb01, (s >>= 16) & 0xffff);
 105       l ^= SBA(sb01, (s >>= 16)         );
 106
 107       s = *k++ ^ l;
 108       r ^= SBA(sb23, (s       ) & 0xffff);
 109       r ^= SBA(sb23, (s >>= 16) & 0xffff);
 110       r ^= SBA(sb01, (s >>= 16) & 0xffff);
 111       r ^= SBA(sb01, (s >>= 16)         );
 112     }
 113     s=l; l=r; r=s;
 114   }
 115
 116   res[0] = l >> 32; res[1] = l & 0xffffffff;
 117   res[2] = r >> 32; res[3] = r & 0xffffffff;
 118 }
 119
 120 #endif