Watt-32 tcp/ip  2.2 dev-rel.10
esp.h
Go to the documentation of this file.
1 
5 /* $FreeBSD: src/sys/netinet6/esp.h,v 1.6 2002/04/19 04:46:22 suz Exp $ */
6 /* $KAME: esp.h,v 1.19 2001/09/04 08:43:19 itojun Exp $ */
7 
8 /*
9  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
10  * All rights reserved.
11  *
12  * Redistribution and use in source and binary forms, with or without
13  * modification, are permitted provided that the following conditions
14  * are met:
15  * 1. Redistributions of source code must retain the above copyright
16  * notice, this list of conditions and the following disclaimer.
17  * 2. Redistributions in binary form must reproduce the above copyright
18  * notice, this list of conditions and the following disclaimer in the
19  * documentation and/or other materials provided with the distribution.
20  * 3. Neither the name of the project nor the names of its contributors
21  * may be used to endorse or promote products derived from this software
22  * without specific prior written permission.
23  *
24  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27  * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34  * SUCH DAMAGE.
35  */
36 
37 /*
38  * RFC1827/2406 Encapsulated Security Payload.
39  */
40 
41 #ifndef _NETINET6_ESP_H_
42 #define _NETINET6_ESP_H_
43 
44 #if defined(_KERNEL) && !defined(_LKM)
45 #include "opt_inet.h"
46 #endif
47 
48 struct esp {
49  u_int32_t esp_spi; /* ESP */
50  /* variable size, 32bit bound *//* Initialization Vector */
51  /* variable size */ /* Payload data */
52  /* variable size */ /* padding */
53  /* 8bit */ /* pad size */
54  /* 8bit */ /* next header */
55  /* 8bit */ /* next header */
56  /* variable size, 32bit bound */ /* Authentication data (new IPsec) */
57  };
58 
59 struct newesp {
60  u_int32_t esp_spi; /* ESP */
61  u_int32_t esp_seq; /* Sequence number */
62  /* variable size */ /* (IV and) Payload data */
63  /* variable size */ /* padding */
64  /* 8bit */ /* pad size */
65  /* 8bit */ /* next header */
66  /* 8bit */ /* next header */
67  /* variable size, 32bit bound *//* Authentication data */
68  };
69 
70 struct esptail {
71  u_int8_t esp_padlen; /* pad length */
72  u_int8_t esp_nxt; /* Next header */
73  /* variable size, 32bit bound *//* Authentication data (new IPsec)*/
74  };
75 
76 #ifdef _KERNEL
77 struct mbuf;
78 struct secasvar;
79 
80 struct esp_algorithm {
81  size_t padbound; /* pad boundary, in byte */
82  int ivlenval; /* iv length, in byte */
83  int (*mature) (struct secasvar *);
84  int keymin; /* in bits */
85  int keymax; /* in bits */
86  int (*schedlen) (const struct esp_algorithm *);
87  const char *name;
88  int (*ivlen) (const struct esp_algorithm *, struct secasvar *);
89  int (*decrypt) (struct mbuf *, size_t,
90  struct secasvar *, const struct esp_algorithm *, int);
91  int (*encrypt) (struct mbuf *, size_t, size_t,
92  struct secasvar *, const struct esp_algorithm *, int);
93  /* not supposed to be called directly */
94  int (*schedule) (const struct esp_algorithm *, struct secasvar *);
95  int (*blockdecrypt) (const struct esp_algorithm *,
96  struct secasvar *, u_int8_t *, u_int8_t *);
97  int (*blockencrypt) (const struct esp_algorithm *,
98  struct secasvar *, u_int8_t *, u_int8_t *);
99  };
100 
101 extern const struct esp_algorithm *esp_algorithm_lookup (int);
102 extern int esp_max_ivlen (void);
103 
104 /* crypt routines */
105 extern int esp4_output (struct mbuf *, struct ipsecrequest *);
106 extern void esp4_input (struct mbuf *, int);
107 extern size_t esp_hdrsiz (struct ipsecrequest *);
108 
109 extern int esp_schedule (const struct esp_algorithm *, struct secasvar *);
110 extern int esp_auth (struct mbuf *, size_t, size_t,
111  struct secasvar *, u_char *);
112 #endif /* _KERNEL */
113 
114 #endif /* _NETINET6_ESP_H_ */
Definition: esp.h:59
Definition: mbuf.h:6
Definition: esp.h:48
Definition: esp.h:70