/* $NetBSD: xform.h,v 1.4 2007/03/04 06:03:30 christos Exp $ */ /* $FreeBSD: src/sys/netipsec/xform.h,v 1.1.4.1 2003/01/24 05:11:36 sam Exp $ */ /* $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 #include #include #define AH_HMAC_HASHLEN 12 /* 96 bits of authenticator */ #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; }; /* * 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 */ void * tc_ptr; /* associated crypto data */ }; 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 const 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 ip4_input6(struct mbuf **m, int *offp, int proto); extern void ip4_input(struct mbuf *m, ...); 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_ */