1 /* $OpenBSD: math_group.h,v 1.10 2004/04/15 18:39:26 deraadt Exp $ */ 2 /* $EOM: math_group.h,v 1.7 1999/04/17 23:20:40 niklas Exp $ */ 3 4 /* 5 * Copyright (c) 1998 Niels Provos. All rights reserved. 6 * Copyright (c) 1999 Niklas Hallqvist. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 /* 30 * This code was written under funding by Ericsson Radio Systems. 31 */ 32 33 #ifndef _MATH_GROUP_H_ 34 #define _MATH_GROUP_H_ 35 36 enum groups { 37 MODP, /* F_p, Z modulo a prime */ 38 EC2N, /* Elliptic Curve over the Field GF(2**N) */ 39 ECP, /* Elliptic Curve over the Field Z_p */ 40 NOTYET /* Not yet assigned */ 41 }; 42 43 /* 44 * The group on which diffie hellmann calculations are done. 45 */ 46 47 struct group { 48 enum groups type; 49 int id; /* Group ID */ 50 int bits; /* Number of key bits provided by this group */ 51 void *group; 52 void *a, *b, *c, *d; 53 void *gen; /* Group Generator */ 54 int (*getlen) (struct group *); 55 void (*getraw) (struct group *, void *, u_int8_t *); 56 int (*setraw) (struct group *, void *, u_int8_t *, int); 57 int (*setrandom) (struct group *, void *); 58 int (*operation) (struct group *, void *, void *, void *); 59 }; 60 61 /* Description of an Elliptic Group over GF(2**n) for Boot-Strapping */ 62 63 struct ec2n_dscr { 64 int id; 65 int bits; /* Key Bits provided by this group */ 66 char *polynomial; /* Irreduceable polynomial */ 67 char *gen_x; /* X - Coord. of Generator */ 68 char *a, *b; /* Curve Parameters */ 69 }; 70 71 /* Description of F_p for Boot-Strapping */ 72 73 struct modp_dscr { 74 int id; 75 int bits; /* Key Bits provided by this group */ 76 char *prime; /* Prime */ 77 char *gen; /* Generator */ 78 }; 79 80 /* Prototypes */ 81 82 void group_init(void); 83 void group_free(struct group *); 84 struct group *group_get(u_int32_t); 85 86 void ec2n_free(struct group *); 87 struct group *ec2n_clone(struct group *, struct group *); 88 void ec2n_init(struct group *); 89 90 void modp_free(struct group *); 91 struct group *modp_clone(struct group *, struct group *); 92 void modp_init(struct group *); 93 94 #endif /* _MATH_GROUP_H_ */ 95