| 1 | /* -*-c-*- |
| 2 | * |
| 3 | * $Id: ectab.h,v 1.3 2004/04/01 21:28:41 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 | /*----- Revision history --------------------------------------------------* |
| 31 | * |
| 32 | * $Log: ectab.h,v $ |
| 33 | * Revision 1.3 2004/04/01 21:28:41 mdw |
| 34 | * Normal basis support (translates to poly basis internally). Rewrite |
| 35 | * EC and prime group table generators in awk, so that they can reuse data |
| 36 | * for repeated constants. |
| 37 | * |
| 38 | * Revision 1.2 2004/04/01 12:50:09 mdw |
| 39 | * Add cyclic group abstraction, with test code. Separate off exponentation |
| 40 | * functions for better static linking. Fix a buttload of bugs on the way. |
| 41 | * Generally ensure that negative exponents do inversion correctly. Add |
| 42 | * table of standard prime-field subgroups. (Binary field subgroups are |
| 43 | * currently unimplemented but easy to add if anyone ever finds a good one.) |
| 44 | * |
| 45 | * Revision 1.1 2004/03/27 17:54:11 mdw |
| 46 | * Standard curves and curve checking. |
| 47 | * |
| 48 | */ |
| 49 | |
| 50 | #ifndef CATACOMB_ECTAB_H |
| 51 | #define CATACOMB_ECTAB_H |
| 52 | |
| 53 | #ifdef __cplusplus |
| 54 | extern "C" { |
| 55 | #endif |
| 56 | |
| 57 | /*----- Header files ------------------------------------------------------*/ |
| 58 | |
| 59 | #include "ec.h" |
| 60 | |
| 61 | /*----- Data structures ---------------------------------------------------*/ |
| 62 | |
| 63 | typedef struct ecdata { |
| 64 | unsigned ftag; /* The kind of curve this is */ |
| 65 | mp p, beta; /* Modulus, and conversion magic */ |
| 66 | mp a, b; /* Elliptic curve parameters */ |
| 67 | mp r; /* Order of common point %$g$% */ |
| 68 | mp h; /* Cofactor %$h = \#E/r$% */ |
| 69 | mp gx, gy; /* Common point */ |
| 70 | } ecdata; |
| 71 | |
| 72 | enum { |
| 73 | FTAG_PRIME, /* Prime but not nice */ |
| 74 | FTAG_NICEPRIME, /* Nice prime field */ |
| 75 | FTAG_BINPOLY, /* Binary field, poly basis */ |
| 76 | FTAG_BINNORM /* Binary field, normal basis */ |
| 77 | }; |
| 78 | |
| 79 | typedef struct ecentry { |
| 80 | const char *name; |
| 81 | ecdata *data; |
| 82 | } ecentry; |
| 83 | |
| 84 | /*----- Global variables --------------------------------------------------*/ |
| 85 | |
| 86 | extern const ecentry ectab[]; |
| 87 | |
| 88 | /*----- That's all, folks -------------------------------------------------*/ |
| 89 | |
| 90 | #ifdef __cplusplus |
| 91 | } |
| 92 | #endif |
| 93 | |
| 94 | #endif |