f46efa79 |
1 | /* -*-c-*- |
2 | * |
3 | * $Id: mpreduce-exp.h,v 1.1 2004/03/27 00:04:46 mdw Exp $ |
4 | * |
5 | * Exponentiation operations for binary field reduction |
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: mpreduce-exp.h,v $ |
33 | * Revision 1.1 2004/03/27 00:04:46 mdw |
34 | * Implement efficient reduction for pleasant-looking primes. |
35 | * |
36 | * Revision 1.2 2004/03/21 22:52:06 mdw |
37 | * Merge and close elliptic curve branch. |
38 | * |
39 | * Revision 1.1.2.1 2004/03/21 22:39:46 mdw |
40 | * Elliptic curves on binary fields work. |
41 | * |
42 | */ |
43 | |
44 | #ifndef CATACOMB_MPREDUCE_EXP_H |
45 | #define CATACOMB_MPREDUCE_EXP_H |
46 | |
47 | #ifdef __cplusplus |
48 | extern "C" { |
49 | #endif |
50 | |
51 | /*----- Exponentiation definitions ----------------------------------------*/ |
52 | |
53 | #define EXP_TYPE mp * |
54 | |
55 | #define EXP_COPY(d, x) d = MP_COPY(x) |
56 | #define EXP_DROP(x) MP_DROP(x) |
57 | |
58 | #define EXP_MUL(a, x) do { \ |
59 | mp *t = mp_mul(spare, a, x); \ |
60 | spare = a; \ |
61 | a = mpreduce_do(mr, t, t); \ |
62 | } while (0) |
63 | |
64 | #define EXP_SQR(a) do { \ |
65 | mp *t = mp_sqr(spare, a); \ |
66 | spare = a; \ |
67 | a = mpreduce_do(mr, t, t); \ |
68 | } while (0) |
69 | |
70 | #define EXP_FIX(x) |
71 | |
72 | #define EXP_SETMUL(d, x, y) do { \ |
73 | d = mp_mul(MP_NEW, x, y); \ |
74 | d = mpreduce_do(mr, d, d); \ |
75 | } while (0) |
76 | |
77 | #define EXP_SETSQR(d, x) do { \ |
78 | d = mp_sqr(MP_NEW, x); \ |
79 | d = mpreduce_do(mr, d, d); \ |
80 | } while (0) |
81 | |
82 | #include "exp.h" |
83 | |
84 | /*----- That's all, folks -------------------------------------------------*/ |
85 | |
86 | #ifdef __cplusplus |
87 | } |
88 | #endif |
89 | |
90 | #endif |