3 * Generate tables for %$\gf{2^8}$% multiplication
5 * (c) 2000 Straylight/Edgeware
8 /*----- Licensing notice --------------------------------------------------*
10 * This file is part of Catacomb.
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.
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.
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,
28 /*----- Header files ------------------------------------------------------*/
33 #include <mLib/bits.h>
35 /*----- Magic numbers -----------------------------------------------------*/
39 /*----- Main code ---------------------------------------------------------*/
41 int main(int argc, char *argv[])
43 octet log[256], alog[256];
48 for (i = 0; i < 255; i++) {
61 * Log tables for secret sharing in %$\\gf{2^8}$% [generated]\n\
64 #include <mLib/bits.h>\n\
66 const octet gfshare_log[256] = {\n\
69 for (i = 0; i < 256; i++) {
70 printf("0x%02x", log[i]);
74 fputs(",\n ", stdout);
80 const octet gfshare_exp[510] = {\n\
83 for (i = 0; i < 510; i++) {
84 printf("0x%02x", alog[i % 255]);
88 fputs(",\n ", stdout);
96 fprintf(stderr, "error writing data\n");
103 /*----- That's all, folks -------------------------------------------------*/