FreeBSD/Linux Kernel Cross Reference
sys/netipsec/xform.h
1 /* $NetBSD: xform.h,v 1.1 2003/08/13 20:06:51 jonathan Exp $ */
2 /* $FreeBSD: src/sys/netipsec/xform.h,v 1.1.4.1 2003/01/24 05:11:36 sam Exp $ */
3 /* $OpenBSD: ip_ipsp.h,v 1.119 2002/03/14 01:27:11 millert Exp $ */
4 /*
5 * The authors of this code are John Ioannidis (ji@tla.org),
6 * Angelos D. Keromytis (kermit@csd.uch.gr),
7 * Niels Provos (provos@physnet.uni-hamburg.de) and
8 * Niklas Hallqvist (niklas@appli.se).
9 *
10 * The original version of this code was written by John Ioannidis
11 * for BSD/OS in Athens, Greece, in November 1995.
12 *
13 * Ported to OpenBSD and NetBSD, with additional transforms, in December 1996,
14 * by Angelos D. Keromytis.
15 *
16 * Additional transforms and features in 1997 and 1998 by Angelos D. Keromytis
17 * and Niels Provos.
18 *
19 * Additional features in 1999 by Angelos D. Keromytis and Niklas Hallqvist.
20 *
21 * Copyright (c) 1995, 1996, 1997, 1998, 1999 by John Ioannidis,
22 * Angelos D. Keromytis and Niels Provos.
23 * Copyright (c) 1999 Niklas Hallqvist.
24 * Copyright (c) 2001, Angelos D. Keromytis.
25 *
26 * Permission to use, copy, and modify this software with or without fee
27 * is hereby granted, provided that this entire notice is included in
28 * all copies of any software which is or includes a copy or
29 * modification of this software.
30 * You may use this code under the GNU public license if you so wish. Please
31 * contribute changes back to the authors under this freer than GPL license
32 * so that we may further the use of strong encryption without limitations to
33 * all.
34 *
35 * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
36 * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY
37 * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
38 * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
39 * PURPOSE.
40 */
41
42 #ifndef _NETIPSEC_XFORM_H_
43 #define _NETIPSEC_XFORM_H_
44
45 #include <sys/types.h>
46 #include <netinet/in.h>
47 #include <opencrypto/xform.h>
48
49 #define AH_HMAC_HASHLEN 12 /* 96 bits of authenticator */
50 #define AH_HMAC_INITIAL_RPL 1 /* replay counter initial value */
51
52 /*
53 * Packet tag assigned on completion of IPsec processing; used
54 * to speedup processing when/if the packet comes back for more
55 * processing.
56 */
57 struct tdb_ident {
58 u_int32_t spi;
59 union sockaddr_union dst;
60 u_int8_t proto;
61 };
62
63 /*
64 * Opaque data structure hung off a crypto operation descriptor.
65 */
66 struct tdb_crypto {
67 struct ipsecrequest *tc_isr; /* ipsec request state */
68 u_int32_t tc_spi; /* associated SPI */
69 union sockaddr_union tc_dst; /* dst addr of packet */
70 u_int8_t tc_proto; /* current protocol, e.g. AH */
71 u_int8_t tc_nxt; /* next protocol, e.g. IPV4 */
72 int tc_protoff; /* current protocol offset */
73 int tc_skip; /* data offset */
74 caddr_t tc_ptr; /* associated crypto data */
75 };
76
77 struct secasvar;
78 struct ipescrequest;
79
80 struct xformsw {
81 u_short xf_type; /* xform ID */
82 #define XF_IP4 1 /* IP inside IP */
83 #define XF_AH 2 /* AH */
84 #define XF_ESP 3 /* ESP */
85 #define XF_TCPSIGNATURE 5 /* TCP MD5 Signature option, RFC 2358 */
86 #define XF_IPCOMP 6 /* IPCOMP */
87 u_short xf_flags;
88 #define XFT_AUTH 0x0001
89 #define XFT_CONF 0x0100
90 #define XFT_COMP 0x1000
91 char *xf_name; /* human-readable name */
92 int (*xf_init)(struct secasvar*, struct xformsw*); /* setup */
93 int (*xf_zeroize)(struct secasvar*); /* cleanup */
94 int (*xf_input)(struct mbuf*, struct secasvar*, /* input */
95 int, int);
96 int (*xf_output)(struct mbuf*, /* output */
97 struct ipsecrequest *, struct mbuf **, int, int);
98 struct xformsw *xf_next; /* list of registered xforms */
99 };
100
101 #ifdef _KERNEL
102 extern void xform_register(struct xformsw*);
103 extern int xform_init(struct secasvar *sav, int xftype);
104
105 struct cryptoini;
106
107 /* XF_IP4 */
108 extern int ip4_input6(struct mbuf **m, int *offp, int proto);
109 extern void ip4_input(struct mbuf *m, ...);
110 extern int ipip_output(struct mbuf *, struct ipsecrequest *,
111 struct mbuf **, int, int);
112
113 /* XF_AH */
114 extern int ah_init0(struct secasvar *, struct xformsw *, struct cryptoini *);
115 extern int ah_zeroize(struct secasvar *sav);
116 extern struct auth_hash *ah_algorithm_lookup(int alg);
117 extern size_t ah_hdrsiz(struct secasvar *);
118
119 /* XF_ESP */
120 extern struct enc_xform *esp_algorithm_lookup(int alg);
121 extern size_t esp_hdrsiz(struct secasvar *sav);
122
123 /* XF_COMP */
124 extern struct comp_algo *ipcomp_algorithm_lookup(int alg);
125
126 #endif /* _KERNEL */
127 #endif /* _NETIPSEC_XFORM_H_ */
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