172 lines
5.0 KiB
C
172 lines
5.0 KiB
C
/* $OpenBSD: ipsec.h,v 1.27 2017/11/08 13:33:49 patrick Exp $ */
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/* $EOM: ipsec.h,v 1.42 2000/12/03 07:58:20 angelos Exp $ */
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/*
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* Copyright (c) 1998, 1999, 2001 Niklas Hallqvist. All rights reserved.
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* Copyright (c) 1999 Angelos D. Keromytis. All rights reserved.
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* Copyright (c) 2001 Håkan Olsson. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* This code was written under funding by Ericsson Radio Systems.
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*/
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#ifndef _IPSEC_H_
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#define _IPSEC_H_
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#include <sys/queue.h>
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#include <sys/types.h>
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#include <netinet/in.h>
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#include "ipsec_doi.h"
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#include "isakmp_cfg.h"
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struct group;
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struct hash;
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struct ike_auth;
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struct message;
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struct proto;
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struct sa;
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/*
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* IPsec-specific data to be linked into the exchange struct.
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* XXX Should probably be several different structs, one for each kind
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* of exchange, i.e. phase 1, phase 2 and ISAKMP configuration parameters
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* separated.
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*/
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struct ipsec_exch {
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u_int flags;
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struct hash *hash;
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struct ike_auth *ike_auth;
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struct group *group;
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u_int16_t prf_type;
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/* 0 if no KEY_EXCH was proposed, 1 otherwise */
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u_int8_t pfs;
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/*
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* A copy of the initiator SA payload body for later computation of
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* hashes. Phase 1 only.
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*/
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size_t sa_i_b_len;
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u_int8_t *sa_i_b;
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/* Diffie-Hellman values. */
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size_t g_x_len;
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size_t g_xy_len;
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u_int8_t *g_xi;
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u_int8_t *g_xr;
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u_int8_t *g_xy;
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/* SKEYIDs. XXX Phase 1 only? */
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size_t skeyid_len;
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u_int8_t *skeyid;
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u_int8_t *skeyid_d;
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u_int8_t *skeyid_a;
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u_int8_t *skeyid_e;
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/* HASH_I & HASH_R. XXX Do these need to be saved here? */
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u_int8_t *hash_i;
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u_int8_t *hash_r;
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/* KEYMAT */
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size_t keymat_len;
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/* Phase 2. */
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u_int8_t *id_ci;
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size_t id_ci_sz;
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u_int8_t *id_cr;
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size_t id_cr_sz;
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/* ISAKMP configuration mode parameters */
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u_int16_t cfg_id;
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u_int16_t cfg_type;
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LIST_HEAD(isakmp_cfg_attr_head, isakmp_cfg_attr) attrs;
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};
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#define IPSEC_EXCH_FLAG_NO_ID 1
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struct ipsec_sa {
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/* Phase 1. */
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u_int8_t hash;
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size_t skeyid_len;
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u_int8_t *skeyid_d;
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u_int8_t *skeyid_a;
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u_int16_t prf_type;
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/* Phase 2. */
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u_int16_t group_desc;
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/* Tunnel parameters. These are in network byte order. */
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struct sockaddr *src_net;
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struct sockaddr *src_mask;
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struct sockaddr *dst_net;
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struct sockaddr *dst_mask;
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u_int8_t tproto;
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u_int16_t sport;
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u_int16_t dport;
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};
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struct ipsec_proto {
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/* Phase 2. */
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u_int16_t encap_mode;
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u_int16_t auth;
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u_int16_t keylen;
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u_int16_t keyrounds;
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/* This is not negotiated, but rather configured. */
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int32_t replay_window;
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/* KEYMAT */
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u_int8_t *keymat[2];
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};
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extern u_int8_t *ipsec_add_hash_payload(struct message *, size_t);
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extern int ipsec_ah_keylength(struct proto *);
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extern u_int8_t *ipsec_build_id(char *, size_t *);
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extern int ipsec_decode_attribute(u_int16_t, u_int8_t *, u_int16_t,
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void *);
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extern void ipsec_decode_transform(struct message *, struct sa *,
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struct proto *, u_int8_t *);
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extern int ipsec_esp_authkeylength(struct proto *);
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extern int ipsec_esp_enckeylength(struct proto *);
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extern int ipsec_fill_in_hash(struct message *);
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extern int ipsec_gen_g_x(struct message *);
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extern int ipsec_get_id(char *, int *, struct sockaddr **,
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struct sockaddr **, u_int8_t *, u_int16_t *);
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extern ssize_t ipsec_id_size(char *, u_int8_t *);
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extern char *ipsec_id_string(u_int8_t *, size_t);
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extern void ipsec_init(void);
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extern int ipsec_initial_contact(struct message *);
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extern int ipsec_is_attribute_incompatible(u_int16_t, u_int8_t *,
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u_int16_t, void *);
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extern int ipsec_keymat_length(struct proto *);
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extern int ipsec_save_g_x(struct message *);
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extern struct sa *ipsec_sa_lookup(struct sockaddr *, u_int32_t, u_int8_t);
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extern char *ipsec_decode_ids(char *, u_int8_t *, size_t, u_int8_t *,
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size_t, int);
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extern int ipsec_clone_id(u_int8_t **, size_t *, u_int8_t *, size_t);
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#endif /* _IPSEC_H_ */
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