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/* $FreeBSD$ */
/* $KAME: keydb.h,v 1.14 2000/08/02 17:58:26 sakane Exp $ */
/*-
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* 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. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``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 PROJECT OR CONTRIBUTORS 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.
*/
#ifndef _NETIPSEC_KEYDB_H_
#define _NETIPSEC_KEYDB_H_
#ifdef _KERNEL
#include <netipsec/key_var.h>
#ifndef _SOCKADDR_UNION_DEFINED
#define _SOCKADDR_UNION_DEFINED
/*
* The union of all possible address formats we handle.
*/
union sockaddr_union {
struct sockaddr sa;
struct sockaddr_in sin;
struct sockaddr_in6 sin6;
};
#endif /* _SOCKADDR_UNION_DEFINED */
/* Security Assocciation Index */
/* NOTE: Ensure to be same address family */
struct secasindex {
union sockaddr_union src; /* source address for SA */
union sockaddr_union dst; /* destination address for SA */
u_int16_t proto; /* IPPROTO_ESP or IPPROTO_AH */
u_int8_t mode; /* mode of protocol, see ipsec.h */
u_int32_t reqid; /* reqid id who owned this SA */
/* see IPSEC_MANUAL_REQID_MAX. */
};
/*
* In order to split out the keydb implementation from that of the
* PF_KEY sockets we need to define a few structures that while they
* may seem common are likely to diverge over time.
*/
/* sadb_identity */
struct secident {
u_int16_t type;
u_int64_t id;
};
/* sadb_key */
struct seckey {
u_int16_t bits;
char *key_data;
};
struct seclifetime {
u_int32_t allocations;
u_int64_t bytes;
u_int64_t addtime;
u_int64_t usetime;
};
/* Security Association Data Base */
struct secashead {
LIST_ENTRY(secashead) chain;
struct secasindex saidx;
struct secident *idents; /* source identity */
struct secident *identd; /* destination identity */
/* XXX I don't know how to use them. */
u_int8_t state; /* MATURE or DEAD. */
LIST_HEAD(_satree, secasvar) savtree[SADB_SASTATE_MAX+1];
/* SA chain */
/* The first of this list is newer SA */
};
struct xformsw;
struct enc_xform;
struct auth_hash;
struct comp_algo;
/* Security Association */
struct secasvar {
LIST_ENTRY(secasvar) chain;
struct mtx lock; /* update/access lock */
u_int refcnt; /* reference count */
u_int8_t state; /* Status of this Association */
u_int8_t alg_auth; /* Authentication Algorithm Identifier*/
u_int8_t alg_enc; /* Cipher Algorithm Identifier */
u_int8_t alg_comp; /* Compression Algorithm Identifier */
u_int32_t spi; /* SPI Value, network byte order */
u_int32_t flags; /* holder for SADB_KEY_FLAGS */
struct seckey *key_auth; /* Key for Authentication */
struct seckey *key_enc; /* Key for Encryption */
u_int ivlen; /* length of IV */
void *sched; /* intermediate encryption key */
size_t schedlen;
uint64_t cntr; /* counter for GCM and CTR */
struct secreplay *replay; /* replay prevention */
time_t created; /* for lifetime */
struct seclifetime *lft_c; /* CURRENT lifetime, it's constant. */
struct seclifetime *lft_h; /* HARD lifetime */
struct seclifetime *lft_s; /* SOFT lifetime */
u_int32_t seq; /* sequence number */
pid_t pid; /* message's pid */
struct secashead *sah; /* back pointer to the secashead */
/*
* NB: Fields with a tdb_ prefix are part of the "glue" used
* to interface to the OpenBSD crypto support. This was done
* to distinguish this code from the mainline KAME code.
*/
struct xformsw *tdb_xform; /* transform */
struct enc_xform *tdb_encalgxform; /* encoding algorithm */
struct auth_hash *tdb_authalgxform; /* authentication algorithm */
struct comp_algo *tdb_compalgxform; /* compression algorithm */
u_int64_t tdb_cryptoid; /* crypto session id */
/*
* NAT-Traversal.
*/
u_int16_t natt_type; /* IKE/ESP-marker in output. */
u_int16_t natt_esp_frag_len; /* MTU for payload fragmentation. */
};
#define SECASVAR_LOCK_INIT(_sav) \
mtx_init(&(_sav)->lock, "ipsec association", NULL, MTX_DEF)
#define SECASVAR_LOCK(_sav) mtx_lock(&(_sav)->lock)
#define SECASVAR_UNLOCK(_sav) mtx_unlock(&(_sav)->lock)
#define SECASVAR_LOCK_DESTROY(_sav) mtx_destroy(&(_sav)->lock)
#define SECASVAR_LOCK_ASSERT(_sav) mtx_assert(&(_sav)->lock, MA_OWNED)
#define SAV_ISGCM(_sav) \
((_sav)->alg_enc == SADB_X_EALG_AESGCM8 || \
(_sav)->alg_enc == SADB_X_EALG_AESGCM12 || \
(_sav)->alg_enc == SADB_X_EALG_AESGCM16)
#define SAV_ISCTR(_sav) ((_sav)->alg_enc == SADB_X_EALG_AESCTR)
#define SAV_ISCTRORGCM(_sav) (SAV_ISCTR((_sav)) || SAV_ISGCM((_sav)))
/* replay prevention */
struct secreplay {
u_int32_t count;
u_int wsize; /* window size, i.g. 4 bytes */
u_int32_t seq; /* used by sender */
u_int32_t lastseq; /* used by receiver */
caddr_t bitmap; /* used by receiver */
int overflow; /* overflow flag */
};
/* socket table due to send PF_KEY messages. */
struct secreg {
LIST_ENTRY(secreg) chain;
struct socket *so;
};
/* acquiring list table. */
struct secacq {
LIST_ENTRY(secacq) chain;
struct secasindex saidx;
u_int32_t seq; /* sequence number */
time_t created; /* for lifetime */
int count; /* for lifetime */
};
/* Sensitivity Level Specification */
/* nothing */
#define SADB_KILL_INTERVAL 600 /* six seconds */
/* secpolicy */
extern struct secpolicy *keydb_newsecpolicy(void);
extern void keydb_delsecpolicy(struct secpolicy *);
/* secashead */
extern struct secashead *keydb_newsecashead(void);
extern void keydb_delsecashead(struct secashead *);
/* secasvar */
extern struct secasvar *keydb_newsecasvar(void);
extern void keydb_refsecasvar(struct secasvar *);
extern void keydb_freesecasvar(struct secasvar *);
/* secreplay */
extern struct secreplay *keydb_newsecreplay(size_t);
extern void keydb_delsecreplay(struct secreplay *);
/* secreg */
extern struct secreg *keydb_newsecreg(void);
extern void keydb_delsecreg(struct secreg *);
#endif /* _KERNEL */
#endif /* _NETIPSEC_KEYDB_H_ */
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