| 1 | /* -*-c-*- |
| 2 | * |
| 3 | * $Id: dh.h,v 1.2 1999/12/10 23:29:48 mdw Exp $ |
| 4 | * |
| 5 | * [Diffie-Hellman key negotiation * |
| 6 | * (c) 1999 Straylight/Edgeware |
| 7 | */ |
| 8 | |
| 9 | /*----- Licensing notice --------------------------------------------------* |
| 10 | * |
| 11 | * This file is part of Catacomb. |
| 12 | * |
| 13 | * Catacomb is free software; you can redistribute it and/or modify |
| 14 | * it under the terms of the GNU Library General Public License as |
| 15 | * published by the Free Software Foundation; either version 2 of the |
| 16 | * License, or (at your option) any later version. |
| 17 | * |
| 18 | * Catacomb is distributed in the hope that it will be useful, |
| 19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 21 | * GNU Library General Public License for more details. |
| 22 | * |
| 23 | * You should have received a copy of the GNU Library General Public |
| 24 | * License along with Catacomb; if not, write to the Free |
| 25 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
| 26 | * MA 02111-1307, USA. |
| 27 | */ |
| 28 | |
| 29 | /*----- Revision history --------------------------------------------------* |
| 30 | * |
| 31 | * $Log: dh.h,v $ |
| 32 | * Revision 1.2 1999/12/10 23:29:48 mdw |
| 33 | * Change header file guard names. |
| 34 | * |
| 35 | * Revision 1.1 1999/11/20 22:24:44 mdw |
| 36 | * Add Diffie-Hellman support. |
| 37 | * |
| 38 | */ |
| 39 | |
| 40 | #ifndef CATACOMB_DH_H |
| 41 | #define CATACOMB_DH_H |
| 42 | |
| 43 | #ifdef __cplusplus |
| 44 | extern "C" { |
| 45 | #endif |
| 46 | |
| 47 | /*----- Header files ------------------------------------------------------*/ |
| 48 | |
| 49 | #ifndef CATACOMB_MP_H |
| 50 | # include "mp.h" |
| 51 | #endif |
| 52 | |
| 53 | /*----- Event codes -------------------------------------------------------*/ |
| 54 | |
| 55 | enum { |
| 56 | DHEV_OK, |
| 57 | |
| 58 | DHEV_FAIL, |
| 59 | DHEV_PASS |
| 60 | }; |
| 61 | |
| 62 | /*----- Functions provided ------------------------------------------------*/ |
| 63 | |
| 64 | /* --- @dh_prime@ --- * |
| 65 | * |
| 66 | * Arguments: @mp *s@ = start point for search (must be odd) |
| 67 | * @size_t n@ = number of concerted attempts to make, or zero |
| 68 | * @void (*proc)(int ev, void *p)@ = event handler |
| 69 | * @void *p@ = argument for event handler |
| 70 | * |
| 71 | * Returns: A prime number %$p$% where %$p = 2q + 1$% for prime %$q$%. |
| 72 | * |
| 73 | * Use: Finds a safe prime by sequential search from a given starting |
| 74 | * point. If it fails, a null pointer is returned. |
| 75 | * |
| 76 | * The event handler is informed of the progress of the search. |
| 77 | * It may abort the search at any time by returning a nonzero |
| 78 | * value. |
| 79 | */ |
| 80 | |
| 81 | extern mp *dh_prime(mp */*s*/, size_t /*n*/, |
| 82 | int (*proc)(int /*ev*/, void */*p*/), void */*p*/); |
| 83 | |
| 84 | /*----- That's all, folks -------------------------------------------------*/ |
| 85 | |
| 86 | #ifdef __cplusplus |
| 87 | } |
| 88 | #endif |
| 89 | |
| 90 | #endif |