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/* $OpenBSD: ipsec.h,v 1.13 2000/02/01 02:46:18 niklas Exp $ */
/* $EOM: ipsec.h,v 1.40 2000/01/31 22:33:46 niklas Exp $ */
/*
* Copyright (c) 1998, 1999 Niklas Hallqvist. All rights reserved.
* Copyright (c) 1999 Angelos D. Keromytis. 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Ericsson Radio Systems.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 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 <netinet/in.h>
#include "ipsec_doi.h"
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 two different structs, one for phase 1 and one
* for phase 2 parameters.
*/
struct ipsec_exch {
u_int flags;
struct hash *hash;
struct ike_auth *ike_auth;
struct group *group;
u_int16_t prf_type;
u_int8_t pfs; /* 0 if no KEY_EXCH was proposed, 1 otherwise */
/*
* 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;
};
#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. */
in_addr_t src_net;
in_addr_t src_mask;
in_addr_t dst_net;
in_addr_t dst_mask;
};
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 *msg, 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 *msg);
extern int ipsec_gen_g_x (struct message *);
extern int ipsec_get_id (char *, int *, struct in_addr *, struct in_addr *);
extern ssize_t ipsec_id_size (char *, u_int8_t *);
extern void ipsec_init (void);
extern int ipsec_initial_contact (struct message *msg);
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 (in_addr_t, u_int32_t, u_int8_t);
#endif /* _IPSEC_H_ */
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