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1 | /* -*-c-*- |
| 2 | * |
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3 | * $Id: gfreduce-exp.h,v 1.2 2004/03/21 22:52:06 mdw Exp $ |
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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: gfreduce-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 1.1.2.1 2004/03/21 22:39:46 mdw |
| 37 | * Elliptic curves on binary fields work. |
| 38 | * |
| 39 | */ |
| 40 | |
| 41 | #ifndef CATACOMB_GFREDUCE_EXP_H |
| 42 | #define CATACOMB_GFREDUCE_EXP_H |
| 43 | |
| 44 | #ifdef __cplusplus |
| 45 | extern "C" { |
| 46 | #endif |
| 47 | |
| 48 | /*----- Exponentiation definitions ----------------------------------------*/ |
| 49 | |
| 50 | #define EXP_TYPE mp * |
| 51 | |
| 52 | #define EXP_COPY(d, x) d = MP_COPY(x) |
| 53 | #define EXP_DROP(x) MP_DROP(x) |
| 54 | |
| 55 | #define EXP_MUL(a, x) do { \ |
| 56 | mp *t = gf_mul(spare, a, x); \ |
| 57 | spare = a; \ |
| 58 | a = gfreduce_do(gr, t, t); \ |
| 59 | } while (0) |
| 60 | |
| 61 | #define EXP_SQR(a) do { \ |
| 62 | mp *t = gf_sqr(spare, a); \ |
| 63 | spare = a; \ |
| 64 | a = gfreduce_do(gr, t, t); \ |
| 65 | } while (0) |
| 66 | |
| 67 | #define EXP_FIX(x) |
| 68 | |
| 69 | #define EXP_SETMUL(d, x, y) do { \ |
| 70 | d = gf_mul(MP_NEW, x, y); \ |
| 71 | d = gfreduce_do(gr, d, d); \ |
| 72 | } while (0) |
| 73 | |
| 74 | #define EXP_SETSQR(d, x) do { \ |
| 75 | d = gf_sqr(MP_NEW, x); \ |
| 76 | d = gfreduce_do(gr, 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 |
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