| 1 | /* -*-c-*- |
| 2 | * |
| 3 | * $Id: group-exp.h,v 1.1 2004/04/01 12:50:09 mdw Exp $ |
| 4 | * |
| 5 | * Exponentiation operations for abstract groups |
| 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: group-exp.h,v $ |
| 33 | * Revision 1.1 2004/04/01 12:50:09 mdw |
| 34 | * Add cyclic group abstraction, with test code. Separate off exponentation |
| 35 | * functions for better static linking. Fix a buttload of bugs on the way. |
| 36 | * Generally ensure that negative exponents do inversion correctly. Add |
| 37 | * table of standard prime-field subgroups. (Binary field subgroups are |
| 38 | * currently unimplemented but easy to add if anyone ever finds a good one.) |
| 39 | * |
| 40 | */ |
| 41 | |
| 42 | #ifndef CATACOMB_GROUP_EXP_H |
| 43 | #define CATACOMB_GROUP_EXP_H |
| 44 | |
| 45 | #ifdef __cplusplus |
| 46 | extern "C" { |
| 47 | #endif |
| 48 | |
| 49 | /*----- Exponentation definitions -----------------------------------------*/ |
| 50 | |
| 51 | #define EXP_TYPE ge * |
| 52 | |
| 53 | #define EXP_COPY(d, p) do { \ |
| 54 | (d) = G_CREATE(gg); \ |
| 55 | G_COPY(gg, (d), (p)); \ |
| 56 | } while (0) |
| 57 | #define EXP_DROP(x) G_DESTROY(gg, (x)) |
| 58 | |
| 59 | #define EXP_MUL(a, x) G_MUL(gg, (a), (a), (x)) |
| 60 | #define EXP_SQR(a) G_SQR(gg, (a), (a)); |
| 61 | #define EXP_FIX(x) |
| 62 | |
| 63 | #define EXP_SETMUL(d, x, y) do { \ |
| 64 | (d) = G_CREATE(gg); \ |
| 65 | G_MUL(gg, (d), (x), (y)); \ |
| 66 | } while (0) |
| 67 | #define EXP_SETSQR(d, x) do { \ |
| 68 | (d) = G_CREATE(gg); \ |
| 69 | G_SQR(gg, (d), (x)); \ |
| 70 | } while (0) |
| 71 | |
| 72 | #include "exp.h" |
| 73 | |
| 74 | /*----- That's all, folks -------------------------------------------------*/ |
| 75 | |
| 76 | #ifdef __cplusplus |
| 77 | } |
| 78 | #endif |
| 79 | |
| 80 | #endif |