/* * Copyright 1997-2000 Niels Provos * 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 1.6 2000/12/15 02:50:40 provos Exp $ */ /* * state.h: * state object */ #ifndef _STATE_H_ #define _STATE_H_ #include #include #include #include #include #include "userdefs.h" #ifdef NEED_UTYPES #include "utypes.h" #endif #include "packets.h" /* Possible values of flags */ #define IPSEC_OPT_ENC 0x0001 /* Negotiate encryption */ #define IPSEC_OPT_AUTH 0x0002 /* Negotiate authentication */ #define IPSEC_OPT_REPLAY 0x0100 /* Encryption with replay protection */ #define IPSEC_OPT_ENC_AUTH 0x0200 /* Encryption with authentication */ #define IPSEC_OPT_XOR 0x0400 /* Encryption with XOR */ #define IPSEC_OPT_COMPRESS 0x0800 /* Encryption with COMPRESS */ #define IPSEC_NOTIFY 0x1000 /* State created by kernel notify */ struct stateob { TAILQ_ENTRY(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 */ char address[16]; /* Remote address */ u_int16_t port; /* Remote port for Photuris daemon */ u_int16_t sport, dport; /* Only used by notify at the moment */ u_int8_t protocol; /* to pass back to the kernel */ 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 */ BIGNUM *modulus; /* Modulus for look up in cache */ BIGNUM *generator; /* Generator for look up in cache */ u_int8_t *texchange; /* Their exchange value */ size_t texchangesize; u_int8_t *exchangevalue; /* Our exchange value */ size_t exchangesize; u_int8_t *shared; /* Shared secret */ size_t sharedsize; int retries; /* Number of retransmits */ u_int8_t *packet; /* Buffer for retransmits */ size_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 */ void state_init(void); 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_icookie(u_int8_t *); 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