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1 | /* -*-c-*- |
2 | * |
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3 | * $Id: ectab.h,v 1.3 2004/04/01 21:28:41 mdw Exp $ |
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4 | * |
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5 | * Table of standard elliptic curves |
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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 $ |
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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 | * |
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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 | * |
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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 */ |
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65 | mp p, beta; /* Modulus, and conversion magic */ |
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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 */ |
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70 | } ecdata; |
71 | |
72 | enum { |
73 | FTAG_PRIME, /* Prime but not nice */ |
74 | FTAG_NICEPRIME, /* Nice prime field */ |
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75 | FTAG_BINPOLY, /* Binary field, poly basis */ |
76 | FTAG_BINNORM /* Binary field, normal basis */ |
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77 | }; |
78 | |
79 | typedef struct ecentry { |
80 | const char *name; |
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81 | ecdata *data; |
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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 |