git.distorted.org.uk Git - u/mdw/catacomb/blob - math/ectab.h

   1 /* -*-c-*-
   2  *
   3  * Table of standard elliptic curves
   4  *
   5  * (c) 2004 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 #ifndef CATACOMB_ECTAB_H
  29 #define CATACOMB_ECTAB_H
  30
  31 #ifdef __cplusplus
  32   extern "C" {
  33 #endif
  34
  35 /*----- Header files ------------------------------------------------------*/
  36
  37 #include "ec.h"
  38
  39 /*----- Data structures ---------------------------------------------------*/
  40
  41 typedef struct ecdata {
  42   unsigned ftag;                        /* The kind of curve this is */
  43   mp p, beta;                           /* Modulus, and conversion magic */
  44   mp a, b;                              /* Elliptic curve parameters */
  45   mp r;                                 /* Order of common point %$g$% */
  46   mp h;                                 /* Cofactor %$h = \#E/r$% */
  47   mp gx, gy;                            /* Common point */
  48 } ecdata;
  49
  50 enum {
  51   FTAG_PRIME,                           /* Prime but not nice */
  52   FTAG_NICEPRIME,                       /* Nice prime field */
  53   FTAG_BINPOLY,                         /* Binary field, poly basis */
  54   FTAG_BINNORM                          /* Binary field, normal basis */
  55 };
  56
  57 typedef struct ecentry {
  58   const char *name;
  59   ecdata *data;
  60 } ecentry;
  61
  62 /*----- Global variables --------------------------------------------------*/
  63
  64 extern const ecentry ectab[];
  65
  66 /*----- That's all, folks -------------------------------------------------*/
  67
  68 #ifdef __cplusplus
  69   }
  70 #endif
  71
  72 #endif