git.distorted.org.uk Git - u/mdw/catacomb/blob - safer-mktab.c

   1 /* -*-c-*-
   2  *
   3  * $Id: safer-mktab.c,v 1.1 2001/04/29 17:49:54 mdw Exp $
   4  *
   5  * Generate tables for SAFER
   6  *
   7  * (c) 2001 Straylight/Edgeware
   8  */
   9
  10 /*----- Licensing notice --------------------------------------------------*
  11  *
  12  * This file is part of Catacomb.
  13  *
  14  * Catacomb is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU Library General Public License as
  16  * published by the Free Software Foundation; either version 2 of the
  17  * License, or (at your option) any later version.
  18  *
  19  * Catacomb is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU Library General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU Library General Public
  25  * License along with Catacomb; if not, write to the Free
  26  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  27  * MA 02111-1307, USA.
  28  */
  29
  30 /*----- Revision history --------------------------------------------------*
  31  *
  32  * $Log: safer-mktab.c,v $
  33  * Revision 1.1  2001/04/29 17:49:54  mdw
  34  * Added SAFER block cipher.
  35  *
  36  */
  37
  38 /*----- Header files ------------------------------------------------------*/
  39
  40 #include <stdio.h>
  41 #include <stdlib.h>
  42
  43 #include <mLib/bits.h>
  44
  45 /*----- Main code ---------------------------------------------------------*/
  46
  47 int main(void)
  48 {
  49   octet s[256], si[256];
  50   unsigned x, i;
  51
  52   x = 1;
  53   for (i = 0; i < 256; i++) {
  54     if (x < 256) {
  55       s[i] = x;
  56       si[x] = i;
  57     }
  58     x = (x * 45)%257;
  59   }
  60   s[128] = 0;
  61   si[0] = 128;
  62
  63   fputs("\
  64 /* -*-c-*-\n\
  65  *\n\
  66  * SAFER tables [generated]\n\
  67  */\n\
  68 \n\
  69 #ifndef CATACOMB_SAFER_TAB_H\n\
  70 #define CATACOMB_SAFER_TAB_H\n\
  71 \n\
  72 ", stdout);
  73
  74   fputs("\
  75 /* --- S-boxes --- */\n\
  76 \n\
  77 #define SAFER_S {                                                       \\\n\
  78   ", stdout);
  79   for (i = 0; i < 256; i++) {
  80     printf("0x%02x", s[i]);
  81     if (i == 255)
  82       fputs("                   \\\n}\n\n", stdout);
  83     else if ((i + 1)%8 == 0)
  84       fputs(",                  \\\n  ", stdout);
  85     else
  86       fputs(", ", stdout);
  87   }
  88
  89   fputs("\
  90 #define SAFER_SI {                                                      \\\n\
  91   ", stdout);
  92   for (i = 0; i < 256; i++) {
  93     printf("0x%02x", si[i]);
  94     if (i == 255)
  95       fputs("                   \\\n}\n\n", stdout);
  96     else if ((i + 1)%8 == 0)
  97       fputs(",                  \\\n  ", stdout);
  98     else
  99       fputs(", ", stdout);
 100   }
 101
 102   puts("#endif");
 103
 104   if (fclose(stdout)) {
 105     fprintf(stderr, "error writing data\n");
 106     exit(EXIT_FAILURE);
 107   }
 108
 109   return (0);
 110 }
 111
 112 /*----- That's all, folks -------------------------------------------------*/