3 * $Id: ectab.h,v 1.2 2004/04/01 12:50:09 mdw Exp $
5 * Table of standard elliptic curves
7 * (c) 2004 Straylight/Edgeware
10 /*----- Licensing notice --------------------------------------------------*
12 * This file is part of Catacomb.
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.
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.
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,
30 /*----- Revision history --------------------------------------------------*
33 * Revision 1.2 2004/04/01 12:50:09 mdw
34 * Add cyclic group abstraction, with test code. Separate off exponentation
35 * functions for better static linking. Fix a buttload of bugs on the way.
36 * Generally ensure that negative exponents do inversion correctly. Add
37 * table of standard prime-field subgroups. (Binary field subgroups are
38 * currently unimplemented but easy to add if anyone ever finds a good one.)
40 * Revision 1.1 2004/03/27 17:54:11 mdw
41 * Standard curves and curve checking.
45 #ifndef CATACOMB_ECTAB_H
46 #define CATACOMB_ECTAB_H
52 /*----- Header files ------------------------------------------------------*/
56 /*----- Data structures ---------------------------------------------------*/
58 typedef struct ecdata
{
59 unsigned ftag
; /* The kind of curve this is */
61 mp a
, b
; /* Elliptic curve parameters */
62 mp r
; /* Order of common point %$g$% */
63 mp h
; /* Cofactor %$h = \#E/r$% */
64 mp gx
, gy
; /* Common point */
68 FTAG_PRIME
, /* Prime but not nice */
69 FTAG_NICEPRIME
, /* Nice prime field */
70 FTAG_BINPOLY
/* Any old binary field */
73 typedef struct ecentry
{
78 /*----- Global variables --------------------------------------------------*/
80 extern const ecentry ectab
[];
82 /*----- That's all, folks -------------------------------------------------*/