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/* $OpenBSD: ipsec.h,v 1.24 2004/05/23 18:17:56 hshoexer Exp $ */
/* $EOM: ipsec.h,v 1.42 2000/12/03 07:58:20 angelos Exp $ */
/*
* Copyright (c) 1998, 1999, 2001 Niklas Hallqvist. All rights reserved.
* Copyright (c) 1999 Angelos D. Keromytis. All rights reserved.
* Copyright (c) 2001 Håkan Olsson. 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 _IPSEC_H_
#define _IPSEC_H_
#include <sys/queue.h>
#include <sys/types.h>
#include <netinet/in.h>
#include "ipsec_doi.h"
#ifdef USE_ISAKMP_CFG
#include "isakmp_cfg.h"
#endif
struct group;
struct hash;
struct ike_auth;
struct message;
struct proto;
struct sa;
/*
* IPsec-specific data to be linked into the exchange struct.
* XXX Should probably be several different structs, one for each kind
* of exchange, i.e. phase 1, phase 2 and ISAKMP configuration parameters
* separated.
*/
struct ipsec_exch {
u_int flags;
struct hash *hash;
struct ike_auth *ike_auth;
struct group *group;
u_int16_t prf_type;
/* 0 if no KEY_EXCH was proposed, 1 otherwise */
u_int8_t pfs;
/*
* A copy of the initiator SA payload body for later computation of
* hashes. Phase 1 only.
*/
size_t sa_i_b_len;
u_int8_t *sa_i_b;
/* Diffie-Hellman values. */
size_t g_x_len;
u_int8_t *g_xi;
u_int8_t *g_xr;
u_int8_t *g_xy;
/* SKEYIDs. XXX Phase 1 only? */
size_t skeyid_len;
u_int8_t *skeyid;
u_int8_t *skeyid_d;
u_int8_t *skeyid_a;
u_int8_t *skeyid_e;
/* HASH_I & HASH_R. XXX Do these need to be saved here? */
u_int8_t *hash_i;
u_int8_t *hash_r;
/* KEYMAT */
size_t keymat_len;
/* Phase 2. */
u_int8_t *id_ci;
size_t id_ci_sz;
u_int8_t *id_cr;
size_t id_cr_sz;
#ifdef USE_ISAKMP_CFG
/* ISAKMP configuration mode parameters */
u_int16_t cfg_id;
u_int16_t cfg_type;
LIST_HEAD(isakmp_cfg_attr_head, isakmp_cfg_attr) attrs;
#endif
};
#define IPSEC_EXCH_FLAG_NO_ID 1
struct ipsec_sa {
/* Phase 1. */
u_int8_t hash;
size_t skeyid_len;
u_int8_t *skeyid_d;
u_int8_t *skeyid_a;
u_int16_t prf_type;
/* Phase 2. */
u_int16_t group_desc;
/* Tunnel parameters. These are in network byte order. */
struct sockaddr *src_net;
struct sockaddr *src_mask;
struct sockaddr *dst_net;
struct sockaddr *dst_mask;
u_int8_t tproto;
u_int16_t sport;
u_int16_t dport;
};
struct ipsec_proto {
/* Phase 2. */
u_int16_t encap_mode;
u_int16_t auth;
u_int16_t keylen;
u_int16_t keyrounds;
/* This is not negotiated, but rather configured. */
int32_t replay_window;
/* KEYMAT */
u_int8_t *keymat[2];
};
extern u_int8_t *ipsec_add_hash_payload(struct message *, size_t);
extern int ipsec_ah_keylength(struct proto *);
extern u_int8_t *ipsec_build_id(char *, size_t *);
extern int ipsec_decode_attribute(u_int16_t, u_int8_t *, u_int16_t, void *);
extern void ipsec_decode_transform(struct message *, struct sa *,
struct proto *, u_int8_t *);
extern int ipsec_esp_authkeylength(struct proto *);
extern int ipsec_esp_enckeylength(struct proto *);
extern int ipsec_fill_in_hash(struct message *);
extern int ipsec_gen_g_x(struct message *);
extern int ipsec_get_id(char *, int *, struct sockaddr **,
struct sockaddr **, u_int8_t *, u_int16_t *);
extern ssize_t ipsec_id_size(char *, u_int8_t *);
extern char *ipsec_id_string(u_int8_t *, size_t);
extern void ipsec_init(void);
extern int ipsec_initial_contact(struct message *);
extern int ipsec_is_attribute_incompatible(u_int16_t, u_int8_t *,
u_int16_t, void *);
extern int ipsec_keymat_length(struct proto *);
extern int ipsec_save_g_x(struct message *);
extern struct sa *ipsec_sa_lookup(struct sockaddr *, u_int32_t, u_int8_t);
extern char *ipsec_decode_ids(char *, u_int8_t *, size_t, u_int8_t *,
size_t, int);
extern int ipsec_clone_id(u_int8_t **, size_t *, u_int8_t *, size_t);
#endif /* _IPSEC_H_ */
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