69 lines
1.9 KiB
C
69 lines
1.9 KiB
C
/* $OpenBSD: dh.h,v 1.15 2021/05/28 18:01:39 tobhe Exp $ */
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/*
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* Copyright (c) 2010-2013 Reyk Floeter <reyk@openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef DH_GROUP_H
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#define DH_GROUP_H
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enum group_type {
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GROUP_MODP = 0,
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GROUP_ECP = 1,
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GROUP_CURVE25519 = 2,
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GROUP_SNTRUP761X25519 = 3
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};
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struct group_id {
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enum group_type type;
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unsigned int id;
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int bits;
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char *prime;
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char *generator;
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int nid;
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};
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struct dh_group {
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int id;
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const struct group_id
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*spec;
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void *dh;
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void *ec;
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void *curve25519;
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void *kemsx;
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int (*init)(struct dh_group *);
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int (*getlen)(struct dh_group *);
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int (*secretlen)(struct dh_group *);
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int (*exchange)(struct dh_group *, uint8_t *);
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int (*exchange2)(struct dh_group *, struct ibuf **, struct ibuf *);
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int (*shared)(struct dh_group *, uint8_t *, uint8_t *);
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int (*shared2)(struct dh_group *, struct ibuf **, struct ibuf *);
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};
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#define DH_MAXSZ 1024 /* 8192 bits */
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void group_init(void);
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void group_free(struct dh_group *);
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struct dh_group *group_get(uint32_t);
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const struct group_id
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*group_getid(uint32_t);
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int dh_create_exchange(struct dh_group *, struct ibuf **, struct ibuf *);
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int dh_create_shared(struct dh_group *, struct ibuf **, struct ibuf *);
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#endif /* DH_GROUP_H */
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