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