130 lines
4.2 KiB
C
130 lines
4.2 KiB
C
/* $FreeBSD$ */
|
|
/* $OpenBSD: ip_ipsp.h,v 1.119 2002/03/14 01:27:11 millert Exp $ */
|
|
/*-
|
|
* The authors of this code are John Ioannidis (ji@tla.org),
|
|
* Angelos D. Keromytis (kermit@csd.uch.gr),
|
|
* Niels Provos (provos@physnet.uni-hamburg.de) and
|
|
* Niklas Hallqvist (niklas@appli.se).
|
|
*
|
|
* The original version of this code was written by John Ioannidis
|
|
* for BSD/OS in Athens, Greece, in November 1995.
|
|
*
|
|
* Ported to OpenBSD and NetBSD, with additional transforms, in December 1996,
|
|
* by Angelos D. Keromytis.
|
|
*
|
|
* Additional transforms and features in 1997 and 1998 by Angelos D. Keromytis
|
|
* and Niels Provos.
|
|
*
|
|
* Additional features in 1999 by Angelos D. Keromytis and Niklas Hallqvist.
|
|
*
|
|
* Copyright (c) 1995, 1996, 1997, 1998, 1999 by John Ioannidis,
|
|
* Angelos D. Keromytis and Niels Provos.
|
|
* Copyright (c) 1999 Niklas Hallqvist.
|
|
* Copyright (c) 2001, Angelos D. Keromytis.
|
|
*
|
|
* Permission to use, copy, and modify this software with or without fee
|
|
* is hereby granted, provided that this entire notice is included in
|
|
* all copies of any software which is or includes a copy or
|
|
* modification of this software.
|
|
* You may use this code under the GNU public license if you so wish. Please
|
|
* contribute changes back to the authors under this freer than GPL license
|
|
* so that we may further the use of strong encryption without limitations to
|
|
* all.
|
|
*
|
|
* THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
|
|
* IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY
|
|
* REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
|
|
* MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
|
|
* PURPOSE.
|
|
*/
|
|
|
|
#ifndef _NETIPSEC_XFORM_H_
|
|
#define _NETIPSEC_XFORM_H_
|
|
|
|
#include <sys/types.h>
|
|
#include <netinet/in.h>
|
|
#include <opencrypto/xform.h>
|
|
|
|
#define AH_HMAC_HASHLEN 12 /* 96 bits of authenticator */
|
|
#define AH_HMAC_MAXHASHLEN (SHA2_512_HASH_LEN/2) /* Keep this updated */
|
|
#define AH_HMAC_INITIAL_RPL 1 /* replay counter initial value */
|
|
|
|
/*
|
|
* Packet tag assigned on completion of IPsec processing; used
|
|
* to speedup processing when/if the packet comes back for more
|
|
* processing.
|
|
*/
|
|
struct tdb_ident {
|
|
u_int32_t spi;
|
|
union sockaddr_union dst;
|
|
u_int8_t proto;
|
|
/* Cache those two for enc(4) in xform_ipip. */
|
|
u_int8_t alg_auth;
|
|
u_int8_t alg_enc;
|
|
};
|
|
|
|
/*
|
|
* Opaque data structure hung off a crypto operation descriptor.
|
|
*/
|
|
struct tdb_crypto {
|
|
struct ipsecrequest *tc_isr; /* ipsec request state */
|
|
u_int32_t tc_spi; /* associated SPI */
|
|
union sockaddr_union tc_dst; /* dst addr of packet */
|
|
u_int8_t tc_proto; /* current protocol, e.g. AH */
|
|
u_int8_t tc_nxt; /* next protocol, e.g. IPV4 */
|
|
int tc_protoff; /* current protocol offset */
|
|
int tc_skip; /* data offset */
|
|
caddr_t tc_ptr; /* associated crypto data */
|
|
struct secasvar *tc_sav; /* related SA */
|
|
};
|
|
|
|
struct secasvar;
|
|
struct ipescrequest;
|
|
|
|
struct xformsw {
|
|
u_short xf_type; /* xform ID */
|
|
#define XF_IP4 1 /* IP inside IP */
|
|
#define XF_AH 2 /* AH */
|
|
#define XF_ESP 3 /* ESP */
|
|
#define XF_TCPSIGNATURE 5 /* TCP MD5 Signature option, RFC 2358 */
|
|
#define XF_IPCOMP 6 /* IPCOMP */
|
|
u_short xf_flags;
|
|
#define XFT_AUTH 0x0001
|
|
#define XFT_CONF 0x0100
|
|
#define XFT_COMP 0x1000
|
|
char *xf_name; /* human-readable name */
|
|
int (*xf_init)(struct secasvar*, struct xformsw*); /* setup */
|
|
int (*xf_zeroize)(struct secasvar*); /* cleanup */
|
|
int (*xf_input)(struct mbuf*, struct secasvar*, /* input */
|
|
int, int);
|
|
int (*xf_output)(struct mbuf*, /* output */
|
|
struct ipsecrequest *, struct mbuf **, int, int);
|
|
struct xformsw *xf_next; /* list of registered xforms */
|
|
};
|
|
|
|
#ifdef _KERNEL
|
|
extern void xform_register(struct xformsw*);
|
|
extern int xform_init(struct secasvar *sav, int xftype);
|
|
|
|
struct cryptoini;
|
|
|
|
/* XF_IP4 */
|
|
extern int ipip_output(struct mbuf *, struct ipsecrequest *,
|
|
struct mbuf **, int, int);
|
|
|
|
/* XF_AH */
|
|
extern int ah_init0(struct secasvar *, struct xformsw *, struct cryptoini *);
|
|
extern int ah_zeroize(struct secasvar *sav);
|
|
extern struct auth_hash *ah_algorithm_lookup(int alg);
|
|
extern size_t ah_hdrsiz(struct secasvar *);
|
|
|
|
/* XF_ESP */
|
|
extern struct enc_xform *esp_algorithm_lookup(int alg);
|
|
extern size_t esp_hdrsiz(struct secasvar *sav);
|
|
|
|
/* XF_COMP */
|
|
extern struct comp_algo *ipcomp_algorithm_lookup(int alg);
|
|
|
|
#endif /* _KERNEL */
|
|
#endif /* _NETIPSEC_XFORM_H_ */
|