FreeBSD/Linux Kernel Cross Reference
sys/netipsec/xform.h
1 /* $FreeBSD$ */
2 /* $OpenBSD: ip_ipsp.h,v 1.119 2002/03/14 01:27:11 millert Exp $ */
3 /*-
4 * The authors of this code are John Ioannidis (ji@tla.org),
5 * Angelos D. Keromytis (kermit@csd.uch.gr),
6 * Niels Provos (provos@physnet.uni-hamburg.de) and
7 * Niklas Hallqvist (niklas@appli.se).
8 *
9 * The original version of this code was written by John Ioannidis
10 * for BSD/OS in Athens, Greece, in November 1995.
11 *
12 * Ported to OpenBSD and NetBSD, with additional transforms, in December 1996,
13 * by Angelos D. Keromytis.
14 *
15 * Additional transforms and features in 1997 and 1998 by Angelos D. Keromytis
16 * and Niels Provos.
17 *
18 * Additional features in 1999 by Angelos D. Keromytis and Niklas Hallqvist.
19 *
20 * Copyright (c) 1995, 1996, 1997, 1998, 1999 by John Ioannidis,
21 * Angelos D. Keromytis and Niels Provos.
22 * Copyright (c) 1999 Niklas Hallqvist.
23 * Copyright (c) 2001, Angelos D. Keromytis.
24 *
25 * Permission to use, copy, and modify this software with or without fee
26 * is hereby granted, provided that this entire notice is included in
27 * all copies of any software which is or includes a copy or
28 * modification of this software.
29 * You may use this code under the GNU public license if you so wish. Please
30 * contribute changes back to the authors under this freer than GPL license
31 * so that we may further the use of strong encryption without limitations to
32 * all.
33 *
34 * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
35 * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY
36 * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
37 * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
38 * PURPOSE.
39 */
40
41 #ifndef _NETIPSEC_XFORM_H_
42 #define _NETIPSEC_XFORM_H_
43
44 #include <sys/types.h>
45 #include <sys/queue.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_MAXHASHLEN (SHA2_512_HASH_LEN/2) /* Keep this updated */
51 #define AH_HMAC_INITIAL_RPL 1 /* replay counter initial value */
52
53 #ifdef _KERNEL
54 struct secpolicy;
55 struct secasvar;
56
57 /*
58 * Packet tag assigned on completion of IPsec processing; used
59 * to speedup security policy checking for INBOUND packets.
60 */
61 struct xform_history {
62 union sockaddr_union dst; /* destination address */
63 uint32_t spi; /* Security Parameters Index */
64 uint8_t proto; /* IPPROTO_ESP or IPPROTO_AH */
65 uint8_t mode; /* transport or tunnel */
66 };
67
68 /*
69 * Opaque data structure hung off a crypto operation descriptor.
70 */
71 struct xform_data {
72 struct secpolicy *sp; /* security policy */
73 struct secasvar *sav; /* related SA */
74 uint64_t cryptoid; /* used crypto session id */
75 u_int idx; /* IPsec request index */
76 int protoff; /* current protocol offset */
77 int skip; /* data offset */
78 uint8_t nxt; /* next protocol, e.g. IPV4 */
79 struct vnet *vnet;
80 };
81
82 #define XF_IP4 1 /* unused */
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
88 struct xformsw {
89 u_short xf_type; /* xform ID */
90 char *xf_name; /* human-readable name */
91 int (*xf_init)(struct secasvar*, struct xformsw*); /* setup */
92 int (*xf_zeroize)(struct secasvar*); /* cleanup */
93 int (*xf_input)(struct mbuf*, struct secasvar*, /* input */
94 int, int);
95 int (*xf_output)(struct mbuf*, /* output */
96 struct secpolicy *, struct secasvar *, u_int, int, int);
97 LIST_ENTRY(xformsw) chain;
98 };
99
100 const struct enc_xform * enc_algorithm_lookup(int);
101 const struct auth_hash * auth_algorithm_lookup(int);
102 const struct comp_algo * comp_algorithm_lookup(int);
103
104 void xform_attach(void *);
105 void xform_detach(void *);
106
107 struct cryptoini;
108 /* XF_AH */
109 int xform_ah_authsize(const struct auth_hash *);
110 extern int ah_init0(struct secasvar *, struct xformsw *, struct cryptoini *);
111 extern int ah_zeroize(struct secasvar *sav);
112 extern size_t ah_hdrsiz(struct secasvar *);
113
114 /* XF_ESP */
115 extern size_t esp_hdrsiz(struct secasvar *sav);
116
117 #endif /* _KERNEL */
118 #endif /* _NETIPSEC_XFORM_H_ */
Cache object: ea6dbf7d9542131fd79995373edc0498
|