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+/* $OpenBSD: math_group.h,v 1.10 2004/04/15 18:39:26 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.
+ *
+ * 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 */
+ NOTYET /* Not yet assigned */
+};
+
+/*
+ * 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(u_int32_t);
+
+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_ */