FreeBSD/Linux Kernel Cross Reference
sys/netipsec/keydb.h
1 /* $FreeBSD: releng/5.2/sys/netipsec/keydb.h 120585 2003-09-29 22:57:43Z sam $ */
2 /* $KAME: keydb.h,v 1.14 2000/08/02 17:58:26 sakane Exp $ */
3
4 /*
5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the project nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 #ifndef _NETIPSEC_KEYDB_H_
34 #define _NETIPSEC_KEYDB_H_
35
36 #ifdef _KERNEL
37
38 #include <netipsec/key_var.h>
39
40 /*
41 * The union of all possible address formats we handle.
42 */
43 union sockaddr_union {
44 struct sockaddr sa;
45 struct sockaddr_in sin;
46 struct sockaddr_in6 sin6;
47 };
48
49 /* Security Assocciation Index */
50 /* NOTE: Ensure to be same address family */
51 struct secasindex {
52 union sockaddr_union src; /* srouce address for SA */
53 union sockaddr_union dst; /* destination address for SA */
54 u_int16_t proto; /* IPPROTO_ESP or IPPROTO_AH */
55 u_int8_t mode; /* mode of protocol, see ipsec.h */
56 u_int32_t reqid; /* reqid id who owned this SA */
57 /* see IPSEC_MANUAL_REQID_MAX. */
58 };
59
60 /* Security Association Data Base */
61 struct secashead {
62 LIST_ENTRY(secashead) chain;
63
64 struct secasindex saidx;
65
66 struct sadb_ident *idents; /* source identity */
67 struct sadb_ident *identd; /* destination identity */
68 /* XXX I don't know how to use them. */
69
70 u_int8_t state; /* MATURE or DEAD. */
71 LIST_HEAD(_satree, secasvar) savtree[SADB_SASTATE_MAX+1];
72 /* SA chain */
73 /* The first of this list is newer SA */
74
75 struct route sa_route; /* route cache */
76 };
77
78 struct xformsw;
79 struct enc_xform;
80 struct auth_hash;
81 struct comp_algo;
82
83 /* Security Association */
84 struct secasvar {
85 LIST_ENTRY(secasvar) chain;
86 struct mtx lock; /* update/access lock */
87
88 u_int refcnt; /* reference count */
89 u_int8_t state; /* Status of this Association */
90
91 u_int8_t alg_auth; /* Authentication Algorithm Identifier*/
92 u_int8_t alg_enc; /* Cipher Algorithm Identifier */
93 u_int8_t alg_comp; /* Compression Algorithm Identifier */
94 u_int32_t spi; /* SPI Value, network byte order */
95 u_int32_t flags; /* holder for SADB_KEY_FLAGS */
96
97 struct sadb_key *key_auth; /* Key for Authentication */
98 struct sadb_key *key_enc; /* Key for Encryption */
99 caddr_t iv; /* Initilization Vector */
100 u_int ivlen; /* length of IV */
101 void *sched; /* intermediate encryption key */
102 size_t schedlen;
103
104 struct secreplay *replay; /* replay prevention */
105 time_t created; /* for lifetime */
106
107 struct sadb_lifetime *lft_c; /* CURRENT lifetime, it's constant. */
108 struct sadb_lifetime *lft_h; /* HARD lifetime */
109 struct sadb_lifetime *lft_s; /* SOFT lifetime */
110
111 u_int32_t seq; /* sequence number */
112 pid_t pid; /* message's pid */
113
114 struct secashead *sah; /* back pointer to the secashead */
115
116 /*
117 * NB: Fields with a tdb_ prefix are part of the "glue" used
118 * to interface to the OpenBSD crypto support. This was done
119 * to distinguish this code from the mainline KAME code.
120 */
121 struct xformsw *tdb_xform; /* transform */
122 struct enc_xform *tdb_encalgxform; /* encoding algorithm */
123 struct auth_hash *tdb_authalgxform; /* authentication algorithm */
124 struct comp_algo *tdb_compalgxform; /* compression algorithm */
125 u_int64_t tdb_cryptoid; /* crypto session id */
126 };
127
128 #define SECASVAR_LOCK_INIT(_sav) \
129 mtx_init(&(_sav)->lock, "ipsec association", NULL, MTX_DEF)
130 #define SECASVAR_LOCK(_sav) mtx_lock(&(_sav)->lock)
131 #define SECASVAR_UNLOCK(_sav) mtx_unlock(&(_sav)->lock)
132 #define SECASVAR_LOCK_DESTROY(_sav) mtx_destroy(&(_sav)->lock)
133 #define SECASVAR_LOCK_ASSERT(_sav) mtx_assert(&(_sav)->lock, MA_OWNED)
134
135 /* replay prevention */
136 struct secreplay {
137 u_int32_t count;
138 u_int wsize; /* window size, i.g. 4 bytes */
139 u_int32_t seq; /* used by sender */
140 u_int32_t lastseq; /* used by receiver */
141 caddr_t bitmap; /* used by receiver */
142 int overflow; /* overflow flag */
143 };
144
145 /* socket table due to send PF_KEY messages. */
146 struct secreg {
147 LIST_ENTRY(secreg) chain;
148
149 struct socket *so;
150 };
151
152 /* acquiring list table. */
153 struct secacq {
154 LIST_ENTRY(secacq) chain;
155
156 struct secasindex saidx;
157
158 u_int32_t seq; /* sequence number */
159 time_t created; /* for lifetime */
160 int count; /* for lifetime */
161 };
162
163 /* Sensitivity Level Specification */
164 /* nothing */
165
166 #define SADB_KILL_INTERVAL 600 /* six seconds */
167
168 /* secpolicy */
169 extern struct secpolicy *keydb_newsecpolicy __P((void));
170 extern void keydb_delsecpolicy __P((struct secpolicy *));
171 /* secashead */
172 extern struct secashead *keydb_newsecashead __P((void));
173 extern void keydb_delsecashead __P((struct secashead *));
174 /* secasvar */
175 extern struct secasvar *keydb_newsecasvar __P((void));
176 extern void keydb_refsecasvar __P((struct secasvar *));
177 extern void keydb_freesecasvar __P((struct secasvar *));
178 /* secreplay */
179 extern struct secreplay *keydb_newsecreplay __P((size_t));
180 extern void keydb_delsecreplay __P((struct secreplay *));
181 /* secreg */
182 extern struct secreg *keydb_newsecreg __P((void));
183 extern void keydb_delsecreg __P((struct secreg *));
184
185 #endif /* _KERNEL */
186
187 #endif /* _NETIPSEC_KEYDB_H_ */
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