44c240ee |
1 | /* -*-c-*- |
2 | * |
3 | * $Id: dh.h,v 1.1 1999/11/20 22:24:44 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 1.1 1999/11/20 22:24:44 mdw |
33 | * Add Diffie-Hellman support. |
34 | * |
35 | */ |
36 | |
37 | #ifndef DH_H |
38 | #define DH_H |
39 | |
40 | #ifdef __cplusplus |
41 | extern "C" { |
42 | #endif |
43 | |
44 | /*----- Header files ------------------------------------------------------*/ |
45 | |
46 | #ifndef MP_H |
47 | # include "mp.h" |
48 | #endif |
49 | |
50 | /*----- Event codes -------------------------------------------------------*/ |
51 | |
52 | enum { |
53 | DHEV_OK, |
54 | |
55 | DHEV_FAIL, |
56 | DHEV_PASS |
57 | }; |
58 | |
59 | /*----- Functions provided ------------------------------------------------*/ |
60 | |
61 | /* --- @dh_prime@ --- * |
62 | * |
63 | * Arguments: @mp *s@ = start point for search (must be odd) |
64 | * @size_t n@ = number of concerted attempts to make, or zero |
65 | * @void (*proc)(int ev, void *p)@ = event handler |
66 | * @void *p@ = argument for event handler |
67 | * |
68 | * Returns: A prime number %$p$% where %$p = 2q + 1$% for prime %$q$%. |
69 | * |
70 | * Use: Finds a safe prime by sequential search from a given starting |
71 | * point. If it fails, a null pointer is returned. |
72 | * |
73 | * The event handler is informed of the progress of the search. |
74 | * It may abort the search at any time by returning a nonzero |
75 | * value. |
76 | */ |
77 | |
78 | extern mp *dh_prime(mp */*s*/, size_t /*n*/, |
79 | int (*proc)(int /*ev*/, void */*p*/), void */*p*/); |
80 | |
81 | /*----- That's all, folks -------------------------------------------------*/ |
82 | |
83 | #ifdef __cplusplus |
84 | } |
85 | #endif |
86 | |
87 | #endif |