1 | /* |
2 | * Copyright (c) 2008-2013 Apple Inc. All rights reserved. |
3 | * |
4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ |
5 | * |
6 | * This file contains Original Code and/or Modifications of Original Code |
7 | * as defined in and that are subject to the Apple Public Source License |
8 | * Version 2.0 (the 'License'). You may not use this file except in |
9 | * compliance with the License. The rights granted to you under the License |
10 | * may not be used to create, or enable the creation or redistribution of, |
11 | * unlawful or unlicensed copies of an Apple operating system, or to |
12 | * circumvent, violate, or enable the circumvention or violation of, any |
13 | * terms of an Apple operating system software license agreement. |
14 | * |
15 | * Please obtain a copy of the License at |
16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. |
17 | * |
18 | * The Original Code and all software distributed under the License are |
19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
23 | * Please see the License for the specific language governing rights and |
24 | * limitations under the License. |
25 | * |
26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
27 | */ |
28 | |
29 | /* $FreeBSD: src/sys/netinet6/esp.h,v 1.2.2.2 2001/07/03 11:01:49 ume Exp $ */ |
30 | /* $KAME: esp.h,v 1.16 2000/10/18 21:28:00 itojun Exp $ */ |
31 | |
32 | /* |
33 | * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. |
34 | * All rights reserved. |
35 | * |
36 | * Redistribution and use in source and binary forms, with or without |
37 | * modification, are permitted provided that the following conditions |
38 | * are met: |
39 | * 1. Redistributions of source code must retain the above copyright |
40 | * notice, this list of conditions and the following disclaimer. |
41 | * 2. Redistributions in binary form must reproduce the above copyright |
42 | * notice, this list of conditions and the following disclaimer in the |
43 | * documentation and/or other materials provided with the distribution. |
44 | * 3. Neither the name of the project nor the names of its contributors |
45 | * may be used to endorse or promote products derived from this software |
46 | * without specific prior written permission. |
47 | * |
48 | * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
49 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
50 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
51 | * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE |
52 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
53 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
54 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
55 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
56 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
57 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
58 | * SUCH DAMAGE. |
59 | */ |
60 | |
61 | /* |
62 | * RFC1827/2406 Encapsulated Security Payload. |
63 | */ |
64 | |
65 | #ifndef _NETINET6_ESP_H_ |
66 | #define _NETINET6_ESP_H_ |
67 | #include <sys/appleapiopts.h> |
68 | |
69 | |
70 | struct esp { |
71 | u_int32_t esp_spi; /* ESP */ |
72 | /*variable size, 32bit bound*/ /* Initialization Vector */ |
73 | /*variable size*/ /* Payload data */ |
74 | /*variable size*/ /* padding */ |
75 | /*8bit*/ /* pad size */ |
76 | /*8bit*/ /* next header */ |
77 | /*8bit*/ /* next header */ |
78 | /*variable size, 32bit bound*/ /* Authentication data (new IPsec) */ |
79 | }; |
80 | |
81 | struct newesp { |
82 | u_int32_t esp_spi; /* ESP */ |
83 | u_int32_t esp_seq; /* Sequence number */ |
84 | /*variable size*/ /* (IV and) Payload data */ |
85 | /*variable size*/ /* padding */ |
86 | /*8bit*/ /* pad size */ |
87 | /*8bit*/ /* next header */ |
88 | /*8bit*/ /* next header */ |
89 | /*variable size, 32bit bound*/ /* Authentication data */ |
90 | }; |
91 | |
92 | struct esptail { |
93 | u_int8_t esp_padlen; /* pad length */ |
94 | u_int8_t esp_nxt; /* Next header */ |
95 | /*variable size, 32bit bound*/ /* Authentication data (new IPsec)*/ |
96 | }; |
97 | |
98 | #ifdef BSD_KERNEL_PRIVATE |
99 | struct secasvar; |
100 | |
101 | struct esp_algorithm { |
102 | size_t padbound; /* pad boundary, in byte */ |
103 | int ivlenval; /* iv length, in byte */ |
104 | int (*mature)(struct secasvar *); |
105 | int keymin; /* in bits */ |
106 | int keymax; /* in bits */ |
107 | int (*schedlen)(const struct esp_algorithm *); |
108 | const char *name; |
109 | int (*ivlen)(const struct esp_algorithm *, struct secasvar *); |
110 | int (*decrypt)(struct mbuf *, size_t, |
111 | struct secasvar *, const struct esp_algorithm *, int); |
112 | int (*encrypt)(struct mbuf *, size_t, size_t, |
113 | struct secasvar *, const struct esp_algorithm *, int); |
114 | /* not supposed to be called directly */ |
115 | int (*schedule)(const struct esp_algorithm *, struct secasvar *); |
116 | int (*blockdecrypt)(const struct esp_algorithm *, |
117 | struct secasvar *, u_int8_t *, u_int8_t *); |
118 | int (*blockencrypt)(const struct esp_algorithm *, |
119 | struct secasvar *, u_int8_t *, u_int8_t *); |
120 | /* For Authenticated Encryption Methods */ |
121 | size_t icvlen; |
122 | int (*finalizedecrypt)(struct secasvar *, u_int8_t *, uint); |
123 | int (*finalizeencrypt)(struct secasvar *, u_int8_t *, uint); |
124 | }; |
125 | |
126 | extern const struct esp_algorithm *esp_algorithm_lookup(int); |
127 | extern int esp_max_ivlen(void); |
128 | |
129 | /* crypt routines */ |
130 | extern int esp4_output(struct mbuf *, struct secasvar *); |
131 | extern void esp4_input(struct mbuf *, int off); |
132 | extern struct mbuf *esp4_input_extended(struct mbuf *, int off, ifnet_t interface); |
133 | extern size_t esp_hdrsiz(struct ipsecrequest *); |
134 | |
135 | extern int esp_schedule(const struct esp_algorithm *, struct secasvar *); |
136 | extern int esp_auth(struct mbuf *, size_t, size_t, |
137 | struct secasvar *, u_char *); |
138 | #endif /* BSD_KERNEL_PRIVATE */ |
139 | |
140 | #endif /* _NETINET6_ESP_H_ */ |
141 | |