xref: /titanic_44/usr/src/cmd/ssh/include/dh.h (revision 6dfee4834394825da35b977ca71cdc965bc7b6a4)
1 /*	$OpenBSD: dh.h,v 1.7 2001/06/26 17:27:23 markus Exp $	*/
2 
3 #ifndef	_DH_H
4 #define	_DH_H
5 
6 #pragma ident	"%Z%%M%	%I%	%E% SMI"
7 
8 #ifdef __cplusplus
9 extern "C" {
10 #endif
11 
12 
13 /*
14  * Copyright (c) 2000 Niels Provos.  All rights reserved.
15  *
16  * Redistribution and use in source and binary forms, with or without
17  * modification, are permitted provided that the following conditions
18  * are met:
19  * 1. Redistributions of source code must retain the above copyright
20  *    notice, this list of conditions and the following disclaimer.
21  * 2. Redistributions in binary form must reproduce the above copyright
22  *    notice, this list of conditions and the following disclaimer in the
23  *    documentation and/or other materials provided with the distribution.
24  *
25  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
26  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
27  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
28  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
29  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
30  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
31  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
32  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
33  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
34  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35  */
36 
37 struct dhgroup {
38 	int size;
39 	BIGNUM *g;
40 	BIGNUM *p;
41 };
42 
43 DH	*choose_dh(int, int, int);
44 DH	*dh_new_group_asc(const char *, const char *);
45 DH	*dh_new_group(BIGNUM *, BIGNUM *);
46 DH	*dh_new_group1(void);
47 
48 void	 dh_gen_key(DH *, int);
49 int	 dh_pub_is_valid(DH *, BIGNUM *);
50 
51 int	 dh_estimate(int);
52 
53 #define DH_GRP_MIN	1024
54 #define DH_GRP_MAX	8192
55 
56 #ifdef __cplusplus
57 }
58 #endif
59 
60 #endif /* _DH_H */
61