diff options
Diffstat (limited to 'sys/netipsec/xform.h')
| -rw-r--r-- | sys/netipsec/xform.h | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/sys/netipsec/xform.h b/sys/netipsec/xform.h new file mode 100644 index 000000000000..04c2e07339c0 --- /dev/null +++ b/sys/netipsec/xform.h @@ -0,0 +1,126 @@ +/* $FreeBSD$ */ +/* $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_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 */ + caddr_t 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 + 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_ */ |