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

   1 /* -*-c-*-
   2  *
   3  * $Id: ectab.h,v 1.4 2004/04/08 01:36:15 mdw Exp $
   4  *
   5  * Table of standard elliptic curves
   6  *
   7  * (c) 2004 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 #ifndef CATACOMB_ECTAB_H
  31 #define CATACOMB_ECTAB_H
  32
  33 #ifdef __cplusplus
  34   extern "C" {
  35 #endif
  36
  37 /*----- Header files ------------------------------------------------------*/
  38
  39 #include "ec.h"
  40
  41 /*----- Data structures ---------------------------------------------------*/
  42
  43 typedef struct ecdata {
  44   unsigned ftag;                        /* The kind of curve this is */
  45   mp p, beta;                           /* Modulus, and conversion magic */
  46   mp a, b;                              /* Elliptic curve parameters */
  47   mp r;                                 /* Order of common point %$g$% */
  48   mp h;                                 /* Cofactor %$h = \#E/r$% */
  49   mp gx, gy;                            /* Common point */
  50 } ecdata;
  51
  52 enum {
  53   FTAG_PRIME,                           /* Prime but not nice */
  54   FTAG_NICEPRIME,                       /* Nice prime field */
  55   FTAG_BINPOLY,                         /* Binary field, poly basis */
  56   FTAG_BINNORM                          /* Binary field, normal basis */
  57 };
  58
  59 typedef struct ecentry {
  60   const char *name;
  61   ecdata *data;
  62 } ecentry;
  63
  64 /*----- Global variables --------------------------------------------------*/
  65
  66 extern const ecentry ectab[];
  67
  68 /*----- That's all, folks -------------------------------------------------*/
  69
  70 #ifdef __cplusplus
  71   }
  72 #endif
  73
  74 #endif