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

   1 /* -*-c-*-
   2  *
   3  * Generate tables for Whirlpool hash function
   4  *
   5  * (c) 2005 Straylight/Edgeware
   6  */
   7
   8 /*----- Licensing notice --------------------------------------------------*
   9  *
  10  * This file is part of Catacomb.
  11  *
  12  * Catacomb is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU Library General Public License as
  14  * published by the Free Software Foundation; either version 2 of the
  15  * License, or (at your option) any later version.
  16  *
  17  * Catacomb is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU Library General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU Library General Public
  23  * License along with Catacomb; if not, write to the Free
  24  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  25  * MA 02111-1307, USA.
  26  */
  27
  28 /*----- Header files ------------------------------------------------------*/
  29
  30 #include <assert.h>
  31 #include <stdio.h>
  32 #include <stdlib.h>
  33
  34 #include <mLib/bits.h>
  35
  36 /*----- Static variables --------------------------------------------------*/
  37
  38 static const octet E[] = {
  39   0x1, 0xb, 0x9, 0xc, 0xd, 0x6, 0xf, 0x3,
  40   0xe, 0x8, 0x7, 0x4, 0xa, 0x2, 0x5, 0x0
  41 }, R[] = {
  42   0x7, 0xc, 0xb, 0xd, 0xe, 0x4, 0x9, 0xf,
  43   0x6, 0x3, 0x8, 0xa, 0x2, 0x5, 0x1, 0x0
  44 }, C[] = {
  45   0x1, 0x1, 0x4, 0x1, 0x8, 0x5, 0x2, 0x9
  46 };
  47
  48 static octet S[256], T[256][8], log[256], alog[256];
  49
  50 /*----- Main code ---------------------------------------------------------*/
  51
  52 #define S_MOD 0x11d
  53
  54 static void logtable(void)
  55 {
  56   unsigned i, x;
  57
  58   for (i = 0, x = 1; i < 255; i++) {
  59     log[x] = i;
  60     alog[i] = x;
  61     x <<= 1;
  62     if (x & 0x100) x ^= S_MOD;
  63   }
  64 }
  65
  66 static octet mul(octet x, octet y)
  67   { if (!x || !y) return (0); return (alog[(log[x] + log[y]) % 255]); }
  68
  69 static void sbox(void)
  70 {
  71   unsigned i, j;
  72   octet EI[16];
  73   octet l, r, y;
  74
  75   for (i = 0; i < 16; i++) EI[E[i]] = i;
  76   for (i = 0; i < 256; i++) {
  77     l = (i >> 4) & 0xf;
  78     r = (i >> 0) & 0xf;
  79     l = E[l]; r = EI[r];
  80     y = R[l ^ r];
  81     l = E[l ^ y]; r = EI[r ^ y];
  82     S[i] = (l << 4) | r;
  83   }
  84
  85   for (i = 0; i < 256; i++) {
  86     for (j = 0; j < 8; j++)
  87       T[i][j] = mul(S[i], C[j]);
  88   }
  89 }
  90
  91 static unsigned long w32(int i, int j, int k)
  92 {
  93   kludge64 x;
  94   LOAD64_L_(x, T[j]);
  95   ROL64_(x, x, i * 8);
  96   return (k ? LO64(x) : HI64(x));
  97 }
  98
  99 int main(void)
 100 {
 101   int i, j;
 102
 103   puts("\
 104 /* -*-c-*-\n\
 105  *\n\
 106  * Whirlpool tables [generated]\n\
 107  */\n\
 108 \n\
 109 #ifndef CATACOMB_WHIRLPOOL_TAB_H\n\
 110 #define CATACOMB_WHIRLPOOL_TAB_H\n\
 111 ");
 112
 113   /* --- Write out the S-box --- */
 114
 115   logtable();
 116   sbox();
 117   fputs("\
 118 /* --- The byte substitution --- */\n\
 119 \n\
 120 #define WHIRLPOOL_S {                                                   \\\n\
 121   ", stdout);
 122   for (i = 0; i < 256; i++) {
 123     printf("0x%02x", S[i]);
 124     if (i == 255)
 125       fputs("                   \\\n}\n\n", stdout);
 126     else if (i % 8 == 7)
 127       fputs(",                  \\\n  ", stdout);
 128     else
 129       fputs(", ", stdout);
 130   }
 131
 132   /* --- Write out the key constant tables --- */
 133
 134   fputs("\
 135 /* --- The key generation constants --- */\n\
 136 \n\
 137 #define WHIRLPOOL_C {                                                   \\\n\
 138   ", stdout);
 139   for (i = 0; i < 10; i++) {
 140     printf("X64(%08lx, %08lx)",
 141            (unsigned long)LOAD32_L(&S[i * 8 + 4]),
 142            (unsigned long)LOAD32_L(&S[i * 8 + 0]));
 143     if (i == 9)
 144       fputs("                   \\\n}\n\n", stdout);
 145     else if (i % 2 == 1)
 146       fputs(",                  \\\n  ", stdout);
 147     else
 148       fputs(", ", stdout);
 149   }
 150
 151   /* --- Write out the big T tables --- */
 152
 153   fputs("\
 154 /* --- The 64-bit big round tables --- */\n\
 155 \n\
 156 #define WHIRLPOOL_T {                                                   \\\n\
 157   { ", stdout);
 158   for (j = 0; j < 8; j++) {
 159     for (i = 0; i < 256; i++) {
 160       printf("X64(%08lx, %08lx)", w32(j, i, 0), w32(j, i, 1));
 161       if (i == 255) {
 162         if (j == 7)
 163           fputs(" }                     \\\n}\n\n", stdout);
 164         else
 165           fputs(" },                    \\\n\
 166                                                                         \\\n\
 167   { ", stdout);
 168       } else if (i % 2 == 1)
 169         fputs(",                        \\\n    ", stdout);
 170       else
 171         fputs(", ", stdout);
 172     }
 173   }
 174
 175   /* --- Write out the smaller U and V tables --- */
 176
 177   fputs("\
 178 /* --- The 32-bit round tables --- */\n\
 179 \n\
 180 #define WHIRLPOOL_U {                                                   \\\n\
 181   { ", stdout);
 182   for (j = 0; j < 4; j++) {
 183     for (i = 0; i < 256; i++) {
 184       printf("0x%08lx", w32(j, i, 1));
 185       if (i == 255) {
 186         if (j == 3)
 187           fputs(" }                     \\\n}\n\n", stdout);
 188         else
 189           fputs(" },                    \\\n\
 190                                                                         \\\n\
 191   { ", stdout);
 192       } else if (i % 4 == 3)
 193         fputs(",                        \\\n    ", stdout);
 194       else
 195         fputs(", ", stdout);
 196     }
 197   }
 198
 199   fputs("\
 200 #define WHIRLPOOL_V {                                                   \\\n\
 201   { ", stdout);
 202   for (j = 0; j < 4; j++) {
 203     for (i = 0; i < 256; i++) {
 204       printf("0x%08lx", w32(j, i, 0));
 205       if (i == 255) {
 206         if (j == 3)
 207           fputs(" }                     \\\n}\n\n", stdout);
 208         else
 209           fputs(" },                    \\\n\
 210                                                                         \\\n\
 211   { ", stdout);
 212       } else if (i % 4 == 3)
 213         fputs(",                        \\\n    ", stdout);
 214       else
 215         fputs(", ", stdout);
 216     }
 217   }
 218
 219   /* --- Done --- */
 220
 221   puts("#endif");
 222
 223   if (fclose(stdout)) {
 224     fprintf(stderr, "error writing data\n");
 225     exit(EXIT_FAILURE);
 226   }
 227
 228   return (0);
 229 }
 230
 231 /*----- That's all, folks -------------------------------------------------*/