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/* $OpenBSD: dh.h,v 1.9 2014/08/25 14:42:23 reyk Exp $ */
/*
* Copyright (c) 2010-2013 Reyk Floeter <reyk@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef _DH_H_
#define _DH_H_
enum group_type {
GROUP_MODP = 0,
GROUP_EC2N = 1,
GROUP_ECP = 2
};
struct group_id {
enum group_type type;
u_int id;
int bits;
char *prime;
char *generator;
int nid;
};
struct group {
int id;
struct group_id *spec;
void *dh;
void *ec;
int (*init)(struct group *);
int (*getlen)(struct group *);
int (*exchange)(struct group *, u_int8_t *);
int (*shared)(struct group *, u_int8_t *, u_int8_t *);
};
#define DH_MAXSZ 1024 /* 8192 bits */
void group_init(void);
void group_free(struct group *);
struct group *group_get(u_int32_t);
int dh_getlen(struct group *);
int dh_create_exchange(struct group *, u_int8_t *);
int dh_create_shared(struct group *, u_int8_t *, u_int8_t *);
#endif /* _DH_H_ */
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