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1 | /* -*-c-*- |
| 2 | * |
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3 | * $Id: mpbarrett-exp.h,v 1.2 2004/03/21 22:52:06 mdw Exp $ |
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4 | * |
| 5 | * Exponentiation operations for Barrett 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: mpbarrett-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 00:20:05 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_MPBARRETT_EXP_H |
| 45 | #define CATACOMB_MPBARRETT_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 = mp_mul(spare, a, x); \ |
| 60 | spare = a; \ |
| 61 | a = mpbarrett_reduce(mb, t, t); \ |
| 62 | } while (0) |
| 63 | |
| 64 | #define EXP_SQR(a) do { \ |
| 65 | mp *t = mp_sqr(spare, a); \ |
| 66 | spare = a; \ |
| 67 | a = mpbarrett_reduce(mb, 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) do { \ |
| 73 | d = mp_mul(MP_NEW, x, y); \ |
| 74 | d = mpbarrett_reduce(mb, d, d); \ |
| 75 | } while (0) |
| 76 | |
| 77 | #define EXP_SETSQR(d, x) do { \ |
| 78 | d = mp_sqr(MP_NEW, x); \ |
| 79 | d = mpbarrett_reduce(mb, 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 |
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