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Ben Lindstrom20d7c7b2001-04-04 01:56:17 +00001/* $OpenBSD: dh.h,v 1.5 2001/04/03 19:53:29 markus Exp $ */
Ben Lindstrom36579d32001-01-29 07:39:26 +00002
Damien Miller874d77b2000-10-14 16:23:11 +11003/*
4 * Copyright (c) 2000 Niels Provos. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26#ifndef DH_H
27#define DH_H
28
29struct dhgroup {
30 int size;
31 BIGNUM *g;
32 BIGNUM *p;
33};
34
Damien Miller9709f902001-03-30 10:50:10 +100035DH *choose_dh(int min, int nbits, int max);
36DH *dh_new_group_asc(const char *, const char *);
37DH *dh_new_group(BIGNUM *, BIGNUM *);
38DH *dh_new_group1(void);
39
40void dh_gen_key(DH *, int);
41int dh_pub_is_valid(DH *dh, BIGNUM *dh_pub);
Ben Lindstromdf221392001-03-29 00:36:16 +000042
Ben Lindstrom20d7c7b2001-04-04 01:56:17 +000043int dh_estimate(int bits);
44
Ben Lindstromdf221392001-03-29 00:36:16 +000045#define DH_GRP_MIN 1024
46#define DH_GRP_MAX 8192
Damien Miller874d77b2000-10-14 16:23:11 +110047
48#endif