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/* $OpenBSD: math_group.h,v 1.6 2002/09/06 21:36:52 deraadt Exp $ */
/* $EOM: math_group.h,v 1.7 1999/04/17 23:20:40 niklas Exp $ */
/*
* Copyright (c) 1998 Niels Provos. All rights reserved.
* Copyright (c) 1999 Niklas Hallqvist. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Ericsson Radio Systems.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* This code was written under funding by Ericsson Radio Systems.
*/
#ifndef _MATH_GROUP_H_
#define _MATH_GROUP_H_
enum groups {
MODP, /* F_p, Z modulo a prime */
EC2N, /* Elliptic Curve over the Field GF(2**N) */
ECP /* Elliptic Curve over the Field Z_p */
};
/*
* The group on which diffie hellmann calculations are done.
*/
struct group {
enum groups type;
int id; /* Group ID */
int bits; /* Number of key bits provided by this group */
void *group;
void *a, *b, *c, *d;
void *gen; /* Group Generator */
int (*getlen) (struct group *);
void (*getraw) (struct group *, void *, u_int8_t *);
int (*setraw) (struct group *, void *, u_int8_t *, int);
int (*setrandom) (struct group *, void *);
int (*operation) (struct group *, void *, void *, void *);
};
/* Description of an Elliptic Group over GF(2**n) for Boot-Strapping */
struct ec2n_dscr {
int id;
int bits; /* Key Bits provided by this group */
char *polynomial; /* Irreduceable polynomial */
char *gen_x; /* X - Coord. of Generator */
char *a, *b; /* Curve Parameters */
};
/* Description of F_p for Boot-Strapping */
struct modp_dscr {
int id;
int bits; /* Key Bits provided by this group */
char *prime; /* Prime */
char *gen; /* Generator */
};
/* Prototypes */
void group_init (void);
void group_free (struct group *);
struct group *group_get (int);
void ec2n_free (struct group *);
struct group *ec2n_clone (struct group *, struct group *);
void ec2n_init (struct group *);
void modp_free (struct group *);
struct group *modp_clone (struct group *, struct group *);
void modp_init (struct group *);
#endif /* _MATH_GROUP_H_ */
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