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/*
* Copyright 1997 Niels Provos <provos@physnet.uni-hamburg.de>
* 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 Niels Provos.
* 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.
*/
/* $Id: state.h,v 1.5 1998/03/04 11:43:55 provos Exp $ */
/*
* state.h:
* state object
*/
#ifndef _STATE_H_
#define _STATE_H_
#include <netinet/in.h>
#include <gmp.h>
#include <time.h>
#include "userdefs.h"
#ifdef NEED_UTYPES
#include "utypes.h"
#endif
#include "packets.h"
/* Possible values of flags */
#define IPSEC_OPT_ENC 0x001 /* Negotiate encryption */
#define IPSEC_OPT_AUTH 0x002 /* Negotiate authentication */
#define IPSEC_OPT_TUNNEL 0x004 /* Negotiate tunne mode */
#define IPSEC_OPT_REPLAY 0x100 /* Encryption with replay protection */
#define IPSEC_OPT_ENC_AUTH 0x200 /* Encryption with authentication */
#define IPSEC_OPT_XOR 0x400 /* Encryption with XOR */
#define IPSEC_OPT_COMPRESS 0x800 /* Encryption with COMPRESS */
struct stateob {
struct stateob *next; /* Linked list */
int initiator; /* Boolean */
int phase; /* Actual phase in the exchange */
char *user; /* User name for which do the exchange */
int flags; /* Possible flags for this exchange */
in_addr_t isrc, ismask; /* Accept source for tunnel */
in_addr_t idst, idmask; /* Accept destination for tunnel */
char address[16]; /* Remote address */
u_int16_t port; /* Remote port */
u_int8_t icookie[COOKIE_SIZE]; /* Initator cookie */
u_int8_t rcookie[COOKIE_SIZE]; /* Responder cookie */
u_int8_t counter; /* Connection counter */
u_int8_t resource; /* Received a resource limit */
u_int8_t *verification; /* Verification field of last touched message */
u_int16_t versize;
u_int8_t *scheme; /* Selected exchange scheme, holds gen. */
u_int16_t schemesize; /* Size including value ... */
u_int8_t *roschemes; /* Responder offered schemes */
u_int16_t roschemesize; /* Responder offered schemes size */
u_int8_t oSPI[SPI_SIZE]; /* Owner SPI */
u_int8_t oSPITBV[3]; /* Three Byte Value */
u_int8_t *oSPIident; /* Owner SPI identification */
u_int8_t *oSPIattrib; /* Owner SPI attributes */
u_int16_t oSPIattribsize;
u_int8_t *oSPIoattrib; /* Owner SPI offered attributes */
u_int16_t oSPIoattribsize;
u_int8_t *oSPIsecret; /* Owner SPI secret keys */
u_int16_t oSPIsecretsize;
u_int8_t *oSPIidentver; /* Owner SPI Identity Verification */
u_int16_t oSPIidentversize;
u_int8_t *oSPIidentchoice; /* Owner SPI Identity Choice */
u_int16_t oSPIidentchoicesize;
void *oSPIprivacyctx;
time_t olifetime; /* Owner SPI lifetime */
u_int8_t uSPI[SPI_SIZE]; /* User SPI */
u_int8_t uSPITBV[3]; /* Three Byte Value */
u_int8_t *uSPIident; /* User SPI identification */
u_int8_t *uSPIattrib; /* User SPI attributes */
u_int16_t uSPIattribsize;
u_int8_t *uSPIoattrib; /* User SPI offered attributes */
u_int16_t uSPIoattribsize;
u_int8_t *uSPIsecret; /* User SPI secret keys */
u_int16_t uSPIsecretsize;
u_int8_t *uSPIidentver; /* User SPI Identity Verification */
u_int16_t uSPIidentversize;
u_int8_t *uSPIidentchoice; /* User SPI Identity Choice */
u_int16_t uSPIidentchoicesize;
void *uSPIprivacyctx;
time_t ulifetime; /* User SPI lifetime */
mpz_t modulus; /* Modulus for look up in cache */
mpz_t generator; /* Generator for look up in cache */
u_int8_t *texchange; /* Their exchange value */
u_int16_t texchangesize;
u_int8_t *exchangevalue; /* Our exchange value */
u_int16_t exchangesize;
u_int8_t *shared; /* Shared secret */
u_int16_t sharedsize;
int retries; /* Number of retransmits */
u_int8_t *packet; /* Buffer for retransmits */
u_int16_t packetlen;
u_int8_t packetsig[16]; /* MD5 hash of an old packet */
time_t lifetime; /* Lifetime for the exchange */
time_t exchange_lifetime; /* Use this as default */
time_t spi_lifetime; /* Use this as default */
};
/* Prototypes */
int state_insert(struct stateob *);
int state_unlink(struct stateob *);
struct stateob *state_new(void);
int state_value_reset(struct stateob *);
struct stateob *state_root(void);
struct stateob *state_find(char *);
struct stateob *state_find_next(struct stateob *, char *);
struct stateob *state_find_cookies(char *, u_int8_t *, u_int8_t *);
int state_save_verification(struct stateob *st, u_int8_t *buf, u_int16_t len);
void state_copy_flags(struct stateob *src, struct stateob *dst);
void state_cleanup(void);
void state_expire(void);
#define EXCHANGE_TIMEOUT 60
#define EXCHANGE_LIFETIME 1800
#endif
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