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
220
221
222
223
224
225
226
227
228
229
230
231
232
|
/* $OpenBSD: sa.h,v 1.24 2001/06/27 00:48:21 angelos Exp $ */
/* $EOM: sa.h,v 1.58 2000/10/10 12:39:01 provos Exp $ */
/*
* Copyright (c) 1998, 1999, 2001 Niklas Hallqvist. All rights reserved.
* Copyright (c) 1999, 2001 Angelos D. Keromytis. 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Ericsson Radio Systems.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
/*
* This code was written under funding by Ericsson Radio Systems.
*/
#ifndef _SA_H_
#define _SA_H_
#include <sys/param.h>
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/socket.h>
#include "isakmp.h"
/* Remove a SA if it has not been fully negotiated in this time. */
#define SA_NEGOTIATION_MAX_TIME 120
struct crypto_xf;
struct doi;
struct event;
struct exchange;
struct keystate;
struct message;
struct payload;
struct sa;
struct transport;
/* A protection suite consists of a set of protocol descriptions like this. */
struct proto {
/* Link to the next protocol in the suite. */
TAILQ_ENTRY (proto) link;
/* The SA we belong to. */
struct sa *sa;
/* The protocol number as found in the proposal payload. */
u_int8_t no;
/* The protocol this SA is for. */
u_int8_t proto;
/* Security parameter index info. Element 0 - outgoing, 1 - incoming. */
u_int8_t spi_sz[2];
u_int8_t *spi[2];
/*
* The chosen transform, only valid while the incoming SA payload that held
* it is available for duplicate testing.
*/
struct payload *chosen;
/* The chosen transform's ID. */
u_int8_t id;
/* DOI-specific data. */
void *data;
};
struct sa {
/* Link to SAs with the same hash value. */
LIST_ENTRY (sa) link;
/*
* When several SA's are being negotiated in one message we connect them
* through this link.
*/
TAILQ_ENTRY (sa) next;
/* A name of the major policy deciding offers and acceptable proposals. */
char *name;
/* The transport this SA got negotiated over. */
struct transport *transport;
/* Both initiator and responder cookies. */
u_int8_t cookies[ISAKMP_HDR_COOKIES_LEN];
/* The message ID signifying non-ISAKMP SAs. */
u_int8_t message_id[ISAKMP_HDR_MESSAGE_ID_LEN];
/* The protection suite chosen. */
TAILQ_HEAD (proto_head, proto) protos;
/* The exchange type we should use when rekeying. */
u_int8_t exch_type;
/* Phase is 1 for ISAKMP SAs, and 2 for application ones. */
u_int8_t phase;
/* A reference counter for this structure. */
u_int16_t refcnt;
/* Various flags, look below for descriptions. */
u_int32_t flags;
/* The DOI that is to handle DOI-specific issues for this SA. */
struct doi *doi;
/* Crypto info needed to encrypt/decrypt packets protected by this SA. */
struct crypto_xf *crypto;
int key_length;
struct keystate *keystate;
/* IDs from Phase 1 */
u_int8_t *id_i;
size_t id_i_len;
u_int8_t *id_r;
size_t id_r_len;
/* Set if we were the initiator of the SA/exchange in Phase 1 */
int initiator;
/* Policy session ID, where applicable, copied over from the exchange */
int policy_id;
/*
* The key used to authenticate phase 1, in printable format, used only by
* KeyNote.
*/
char *keynote_key;
/*
* Certificates or other information from Phase 1; these are copied from the
* exchange, so look at exchange.h for an explanation of their use.
*/
int recv_certtype, recv_keytype;
/* Certificate received from peer, native format. */
void *recv_cert;
/* Key peer used to authenticate, native format. */
void *recv_key;
/*
* Certificates or other information we used to authenticate to the peer,
* Phase 1.
*/
int sent_certtype, sent_keytype;
/* Certificate (to be) sent to peer, native format. */
void *sent_cert;
/* Key we'll use to authenticate to peer, native format. */
void *sent_key;
/* DOI-specific opaque data. */
void *data;
/* Lifetime data. */
u_int64_t seconds;
u_int64_t kilobytes;
/* ACQUIRE sequence number */
u_int32_t seq;
/* The events that will occur when an SA has timed out. */
struct event *soft_death;
struct event *death;
};
/* This SA is alive. */
#define SA_FLAG_READY 0x01
/* Renegotiate the SA at each expiry. */
#define SA_FLAG_STAYALIVE 0x02
/* Establish the SA when it is needed. */
#define SA_FLAG_ONDEMAND 0x04
/* This SA has been replaced by another newer one. */
#define SA_FLAG_REPLACED 0x08
/* This SA has seen a soft timeout and wants to be renegotiated on use. */
#define SA_FLAG_FADING 0x10
/* This SA should always be actively renegotiated (with us as initiator). */
#define SA_FLAG_ACTIVE_ONLY 0x20
extern void proto_free (struct proto *proto);
extern int sa_add_transform (struct sa *, struct payload *, int,
struct proto **);
extern int sa_create (struct exchange *, struct transport *);
extern int sa_enter (struct sa *);
extern void sa_delete (struct sa *, int);
extern struct sa *sa_find (int (*) (struct sa *, void *), void *);
extern int sa_flag (char *);
extern void sa_free (struct sa *);
extern void sa_init (void);
extern struct sa *sa_isakmp_lookup_by_peer (struct sockaddr *, socklen_t);
extern void sa_isakmp_upgrade (struct message *);
extern struct sa *sa_lookup (u_int8_t *, u_int8_t *);
extern struct sa *sa_lookup_by_peer (struct sockaddr *, socklen_t);
extern struct sa *sa_lookup_by_header (u_int8_t *, int);
extern struct sa *sa_lookup_by_name (char *, int);
extern struct sa *sa_lookup_from_icookie (u_int8_t *);
extern struct sa *sa_lookup_isakmp_sa (struct sockaddr *, u_int8_t *);
extern void sa_mark_replaced (struct sa *);
extern void sa_reference (struct sa *);
extern void sa_release (struct sa *);
extern void sa_remove (struct sa *);
extern void sa_report (void);
extern int sa_setup_expirations (struct sa *);
#endif /* _SA_H_ */
|
