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
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
|
/* $FreeBSD$ */
/* $KAME: keydb.h,v 1.14 2000/08/02 17:58:26 sakane Exp $ */
/*-
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _NETIPSEC_KEYDB_H_
#define _NETIPSEC_KEYDB_H_
#ifdef _KERNEL
#include <netipsec/key_var.h>
#ifndef _SOCKADDR_UNION_DEFINED
#define _SOCKADDR_UNION_DEFINED
/*
* The union of all possible address formats we handle.
*/
union sockaddr_union {
struct sockaddr sa;
struct sockaddr_in sin;
struct sockaddr_in6 sin6;
};
#endif /* _SOCKADDR_UNION_DEFINED */
/* Security Assocciation Index */
/* NOTE: Ensure to be same address family */
struct secasindex {
union sockaddr_union src; /* source address for SA */
union sockaddr_union dst; /* destination address for SA */
u_int16_t proto; /* IPPROTO_ESP or IPPROTO_AH */
u_int8_t mode; /* mode of protocol, see ipsec.h */
u_int32_t reqid; /* reqid id who owned this SA */
/* see IPSEC_MANUAL_REQID_MAX. */
};
/*
* In order to split out the keydb implementation from that of the
* PF_KEY sockets we need to define a few structures that while they
* may seem common are likely to diverge over time.
*/
/* sadb_identity */
struct secident {
u_int16_t type;
u_int64_t id;
};
/* sadb_key */
struct seckey {
u_int16_t bits;
char *key_data;
};
struct seclifetime {
u_int32_t allocations;
u_int64_t bytes;
u_int64_t addtime;
u_int64_t usetime;
};
/* Security Association Data Base */
struct secashead {
LIST_ENTRY(secashead) chain;
struct secasindex saidx;
struct secident *idents; /* source identity */
struct secident *identd; /* destination identity */
/* XXX I don't know how to use them. */
u_int8_t state; /* MATURE or DEAD. */
LIST_HEAD(_satree, secasvar) savtree[SADB_SASTATE_MAX+1];
/* SA chain */
/* The first of this list is newer SA */
};
struct xformsw;
struct enc_xform;
struct auth_hash;
struct comp_algo;
/* Security Association */
struct secasvar {
LIST_ENTRY(secasvar) chain;
struct mtx lock; /* update/access lock */
u_int refcnt; /* reference count */
u_int8_t state; /* Status of this Association */
u_int8_t alg_auth; /* Authentication Algorithm Identifier*/
u_int8_t alg_enc; /* Cipher Algorithm Identifier */
u_int8_t alg_comp; /* Compression Algorithm Identifier */
u_int32_t spi; /* SPI Value, network byte order */
u_int32_t flags; /* holder for SADB_KEY_FLAGS */
struct seckey *key_auth; /* Key for Authentication */
struct seckey *key_enc; /* Key for Encryption */
caddr_t iv; /* Initilization Vector */
u_int ivlen; /* length of IV */
void *sched; /* intermediate encryption key */
size_t schedlen;
struct secreplay *replay; /* replay prevention */
time_t created; /* for lifetime */
struct seclifetime *lft_c; /* CURRENT lifetime, it's constant. */
struct seclifetime *lft_h; /* HARD lifetime */
struct seclifetime *lft_s; /* SOFT lifetime */
u_int32_t seq; /* sequence number */
pid_t pid; /* message's pid */
struct secashead *sah; /* back pointer to the secashead */
/*
* NB: Fields with a tdb_ prefix are part of the "glue" used
* to interface to the OpenBSD crypto support. This was done
* to distinguish this code from the mainline KAME code.
*/
struct xformsw *tdb_xform; /* transform */
struct enc_xform *tdb_encalgxform; /* encoding algorithm */
struct auth_hash *tdb_authalgxform; /* authentication algorithm */
struct comp_algo *tdb_compalgxform; /* compression algorithm */
u_int64_t tdb_cryptoid; /* crypto session id */
/*
* NAT-Traversal.
*/
u_int16_t natt_type; /* IKE/ESP-marker in output. */
u_int16_t natt_esp_frag_len; /* MTU for payload fragmentation. */
};
#define SECASVAR_LOCK_INIT(_sav) \
mtx_init(&(_sav)->lock, "ipsec association", NULL, MTX_DEF)
#define SECASVAR_LOCK(_sav) mtx_lock(&(_sav)->lock)
#define SECASVAR_UNLOCK(_sav) mtx_unlock(&(_sav)->lock)
#define SECASVAR_LOCK_DESTROY(_sav) mtx_destroy(&(_sav)->lock)
#define SECASVAR_LOCK_ASSERT(_sav) mtx_assert(&(_sav)->lock, MA_OWNED)
/* replay prevention */
struct secreplay {
u_int32_t count;
u_int wsize; /* window size, i.g. 4 bytes */
u_int32_t seq; /* used by sender */
u_int32_t lastseq; /* used by receiver */
caddr_t bitmap; /* used by receiver */
int overflow; /* overflow flag */
};
/* socket table due to send PF_KEY messages. */
struct secreg {
LIST_ENTRY(secreg) chain;
struct socket *so;
};
/* acquiring list table. */
struct secacq {
LIST_ENTRY(secacq) chain;
struct secasindex saidx;
u_int32_t seq; /* sequence number */
time_t created; /* for lifetime */
int count; /* for lifetime */
};
/* Sensitivity Level Specification */
/* nothing */
#define SADB_KILL_INTERVAL 600 /* six seconds */
/* secpolicy */
extern struct secpolicy *keydb_newsecpolicy __P((void));
extern void keydb_delsecpolicy __P((struct secpolicy *));
/* secashead */
extern struct secashead *keydb_newsecashead __P((void));
extern void keydb_delsecashead __P((struct secashead *));
/* secasvar */
extern struct secasvar *keydb_newsecasvar __P((void));
extern void keydb_refsecasvar __P((struct secasvar *));
extern void keydb_freesecasvar __P((struct secasvar *));
/* secreplay */
extern struct secreplay *keydb_newsecreplay __P((size_t));
extern void keydb_delsecreplay __P((struct secreplay *));
/* secreg */
extern struct secreg *keydb_newsecreg __P((void));
extern void keydb_delsecreg __P((struct secreg *));
#endif /* _KERNEL */
#endif /* _NETIPSEC_KEYDB_H_ */
|