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1 | /* -*-c-*- |
2 | * |
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3 | * $Id: mpmont-exp.h,v 1.2 2004/03/21 22:52:06 mdw Exp $ |
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4 | * |
5 | * Exponentiation operations for Montgomery reduction |
6 | * |
7 | * (c) 2001 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: mpmont-exp.h,v $ |
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33 | * Revision 1.2 2004/03/21 22:52:06 mdw |
34 | * Merge and close elliptic curve branch. |
35 | * |
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36 | * Revision 1.1.4.1 2004/03/20 00:13:31 mdw |
37 | * Projective coordinates for prime curves |
38 | * |
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39 | * Revision 1.1 2001/06/16 12:58:12 mdw |
40 | * Parameters for generic exponentiation. |
41 | * |
42 | */ |
43 | |
44 | #ifndef CATACOMB_MPMONT_EXP_H |
45 | #define CATACOMB_MPMONT_EXP_H |
46 | |
47 | #ifdef __cplusplus |
48 | extern "C" { |
49 | #endif |
50 | |
51 | /*----- Exponentation 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 = mpmont_mul(mm, spare, a, x); \ |
60 | spare = a; \ |
61 | a = t; \ |
62 | } while (0) |
63 | |
64 | #define EXP_SQR(a) do { \ |
65 | mp *t = mp_sqr(spare, a); \ |
66 | spare = a; \ |
67 | a = mpmont_reduce(mm, t, t); \ |
68 | } while (0) |
69 | |
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70 | #define EXP_FIX(x) |
71 | |
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72 | #define EXP_SETMUL(d, x, y) d = mpmont_mul(mm, MP_NEW, x, y) |
73 | |
74 | #define EXP_SETSQR(d, x) do { \ |
75 | d = mp_sqr(MP_NEW, x); \ |
76 | d = mpmont_reduce(mm, d, d); \ |
77 | } while (0) |
78 | |
79 | #include "exp.h" |
80 | |
81 | /*----- That's all, folks -------------------------------------------------*/ |
82 | |
83 | #ifdef __cplusplus |
84 | } |
85 | #endif |
86 | |
87 | #endif |