/* $NetBSD: xform.h,v 1.22 2022/05/22 11:39:08 riastradh Exp $ */ /* $FreeBSD: 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 /* * Opaque data structure hung off a crypto operation descriptor. */ struct secasvar; struct tdb_crypto { const 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 */ int tc_flags; /* outer protocol flags, e.g. IPV6_MINMTU */ struct secasvar *tc_sav; /* ipsec SA */ }; struct ipescrequest; struct xformsw { u_short xf_type; #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; int (*xf_init)(struct secasvar *, const struct xformsw *); void (*xf_zeroize)(struct secasvar *); int (*xf_input)(struct mbuf *, struct secasvar *, int, int); int (*xf_output)(struct mbuf *, const struct ipsecrequest *, struct secasvar *, int, int, int); struct xformsw *xf_next; /* list of registered xforms */ }; #ifdef _KERNEL void xform_register(struct xformsw *); int xform_init(struct secasvar *sav, int); struct cryptoini; /* XF_IP4 */ int ipip_output(struct mbuf *, struct secasvar *, struct mbuf **); /* XF_AH */ int ah_init0(struct secasvar *, const struct xformsw *, struct cryptoini *); void ah_zeroize(struct secasvar *); const struct auth_hash *ah_algorithm_lookup(int); size_t ah_authsiz(const struct secasvar *); size_t ah_hdrsiz(const struct secasvar *); /* XF_ESP */ const struct enc_xform *esp_algorithm_lookup(int); size_t esp_hdrsiz(const struct secasvar *); /* XF_COMP */ const struct comp_algo *ipcomp_algorithm_lookup(int); #endif /* _KERNEL */ #endif /* !_NETIPSEC_XFORM_H_ */