1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
|
/* $FreeBSD$ */
/* $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 <sys/queue.h>
#include <netinet/in.h>
#include <opencrypto/xform.h>
#define AH_HMAC_HASHLEN 12 /* 96 bits of authenticator */
#define AH_HMAC_MAXHASHLEN (SHA2_512_HASH_LEN/2) /* Keep this updated */
#define AH_HMAC_INITIAL_RPL 1 /* replay counter initial value */
#ifdef _KERNEL
struct secpolicy;
struct secasvar;
/*
* Packet tag assigned on completion of IPsec processing; used
* to speedup security policy checking for INBOUND packets.
*/
struct xform_history {
union sockaddr_union dst; /* destination address */
uint32_t spi; /* Security Parameters Index */
uint8_t proto; /* IPPROTO_ESP or IPPROTO_AH */
uint8_t mode; /* transport or tunnel */
};
/*
* Opaque data structure hung off a crypto operation descriptor.
*/
struct xform_data {
struct secpolicy *sp; /* security policy */
struct secasvar *sav; /* related SA */
crypto_session_t cryptoid; /* used crypto session */
u_int idx; /* IPsec request index */
int protoff; /* current protocol offset */
int skip; /* data offset */
uint8_t nxt; /* next protocol, e.g. IPV4 */
struct vnet *vnet;
};
#define XF_IP4 1 /* unused */
#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 */
struct xformsw {
u_short xf_type; /* xform ID */
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 secpolicy *, struct secasvar *, u_int, int, int);
LIST_ENTRY(xformsw) chain;
};
const struct enc_xform * enc_algorithm_lookup(int);
const struct auth_hash * auth_algorithm_lookup(int);
const struct comp_algo * comp_algorithm_lookup(int);
void xform_attach(void *);
void xform_detach(void *);
struct cryptoini;
/* XF_AH */
int xform_ah_authsize(const struct auth_hash *);
extern int ah_init0(struct secasvar *, struct xformsw *, struct cryptoini *);
extern int ah_zeroize(struct secasvar *sav);
extern size_t ah_hdrsiz(struct secasvar *);
/* XF_ESP */
extern size_t esp_hdrsiz(struct secasvar *sav);
#endif /* _KERNEL */
#endif /* _NETIPSEC_XFORM_H_ */
|
