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
|
/* $OpenBSD: ip_esp.h,v 1.17 1998/05/18 21:10:41 provos Exp $ */
/*
* The authors of this code are John Ioannidis (ji@tla.org),
* Angelos D. Keromytis (kermit@csd.uch.gr) and
* Niels Provos (provos@physnet.uni-hamburg.de).
*
* This code was written by John Ioannidis for BSD/OS in Athens, Greece,
* in November 1995.
*
* Ported to OpenBSD and NetBSD, with additional transforms, in December 1996,
* by Angelos D. Keromytis.
*
* Additional transforms and features in 1997 and 1998 by Angelos D. Keromytis
* and Niels Provos.
*
* Copyright (C) 1995, 1996, 1997, 1998 by John Ioannidis, Angelos D. Keromytis
* and Niels Provos.
*
* Permission to use, copy, and modify this software without fee
* is hereby granted, provided that this entire notice is included in
* all copies of any software which is or includes a copy or
* modification of this software.
* You may use this code under the GNU public license if you so wish. Please
* contribute changes back to the authors under this freer than GPL license
* so that we may further the use of strong encryption without limitations to
* all.
*
* THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY
* REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
* MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
* PURPOSE.
*/
/*
* Encapsulation Security Payload Processing
* Per RFC1827 (Atkinson, 1995)
*/
#ifndef _MD5_H_
#include <sys/md5k.h>
#endif
#include <netinet/ip_sha1.h>
#include <netinet/ip_rmd160.h>
#include <netinet/ip_blf.h>
#include <netinet/ip_cast.h>
/* IV lengths */
#define ESP_DES_IVS 8
#define ESP_3DES_IVS 8
#define ESP_BLF_IVS 8
#define ESP_CAST_IVS 8
#define ESP_MAX_IVS ESP_3DES_IVS
/* Block sizes -- it is assumed that they're powers of 2 */
#define ESP_DES_BLKS 8
#define ESP_3DES_BLKS 8
#define ESP_BLF_BLKS 8
#define ESP_CAST_BLKS 8
#define ESP_MAX_BLKS ESP_3DES_BLKS
/* Various defines for the "new" ESP */
#define ESP_NEW_ALEN 12 /* 96bits authenticator */
#define ESP_NEW_IPAD_VAL 0x36
#define ESP_NEW_OPAD_VAL 0x5C
struct esp_hash {
int type;
char *name;
u_int16_t hashsize;
u_int16_t ctxsize;
void (*Init)(void *);
void (*Update)(void *, u_int8_t *, u_int16_t);
void (*Final)(u_int8_t *, void *);
};
struct esp_xform {
int type;
char *name;
u_int16_t blocksize, ivsize;
u_int16_t minkey, maxkey;
u_int32_t ivmask; /* Or all possible modes, zero iv = 1 */
void (*encrypt)(void *, u_int8_t *);
void (*decrypt)(void *, u_int8_t *);
};
struct esp_old
{
u_int32_t esp_spi; /* Security Parameters Index */
u_int8_t esp_iv[8]; /* iv[4] may actually be data! */
};
struct esp_new
{
u_int32_t esp_spi; /* Security Parameter Index */
u_int32_t esp_rpl; /* Sequence Number, Replay Counter */
u_int8_t esp_iv[8]; /* Data may start already at iv[0]! */
};
struct espstat
{
u_int32_t esps_hdrops; /* packet shorter than header shows */
u_int32_t esps_notdb;
u_int32_t esps_badkcr;
u_int32_t esps_qfull;
u_int32_t esps_noxform;
u_int32_t esps_badilen;
u_int32_t esps_wrap; /* Replay counter wrapped around */
u_int32_t esps_badauth; /* Only valid for transforms with auth */
u_int32_t esps_replay; /* Possible packet replay detected */
u_int32_t esps_input; /* Input ESP packets */
u_int32_t esps_output; /* Output ESP packets */
u_int32_t esps_invalid; /* Trying to use an invalid TDB */
u_int64_t esps_ibytes; /* input bytes */
u_int64_t esps_obytes; /* output bytes */
};
struct esp_old_xdata
{
u_int32_t edx_enc_algorithm;
int32_t edx_ivlen; /* 4 or 8 */
struct esp_xform *edx_xform;
union
{
u_int8_t Iv[ESP_3DES_IVS]; /* that's enough space */
u_int32_t Ivl; /* make sure this is 4 bytes */
u_int64_t Ivq; /* make sure this is 8 bytes! */
}Iu;
#define edx_iv Iu.Iv
#define edx_ivl Iu.Ivl
#define edx_ivq Iu.Ivq
union
{
u_int8_t Rk[3][8];
u_int32_t Eks[3][16][2];
}Xu;
#define edx_rk Xu.Rk
#define edx_eks Xu.Eks
};
struct esp_old_xencap
{
u_int32_t edx_enc_algorithm;
u_int32_t edx_ivlen;
u_int32_t edx_keylen;
u_int8_t edx_data[1]; /* IV + key material */
};
#define ESP_OLD_XENCAP_LEN (3 * sizeof(u_int32_t))
struct esp_new_xencap
{
u_int32_t edx_enc_algorithm;
u_int32_t edx_hash_algorithm;
u_int32_t edx_ivlen; /* 0 or 8 */
u_int16_t edx_confkeylen;
u_int16_t edx_authkeylen;
int32_t edx_wnd;
u_int32_t edx_flags;
u_int8_t edx_data[1]; /* IV + key material */
};
#define ESP_NEW_XENCAP_LEN (6 * sizeof(u_int32_t))
#define ESP_NEW_FLAG_AUTH 0x00000001 /* Doing authentication too */
#define ESP_NEW_FLAG_NPADDING 0x00000002 /* New style padding */
struct esp_new_xdata
{
u_int32_t edx_enc_algorithm;
u_int32_t edx_hash_algorithm;
u_int32_t edx_ivlen; /* 0 or 8 */
u_int32_t edx_rpl; /* Replay counter */
int32_t edx_wnd; /* Replay window */
u_int32_t edx_bitmap;
u_int32_t edx_flags;
u_int32_t edx_initial; /* initial replay value */
struct esp_hash *edx_hash;
struct esp_xform *edx_xform;
union
{
u_int8_t Iv[ESP_MAX_IVS]; /* that's enough space */
u_int32_t Ivl; /* make sure this is 4 bytes */
u_int64_t Ivq; /* make sure this is 8 bytes! */
}Iu;
union
{
u_int8_t Rk[3][8];
u_int32_t Eks[3][16][2];
blf_ctx Bks;
cast_key Cks;
}Xu;
union
{
MD5_CTX edx_MD5_ictx;
SHA1_CTX edx_SHA1_ictx;
RMD160_CTX edx_RMD160_ictx;
} edx_ictx;
union
{
MD5_CTX edx_MD5_octx;
SHA1_CTX edx_SHA1_octx;
RMD160_CTX edx_RMD160_octx;
} edx_octx;
};
#define edx_bks Xu.Bks
#define edx_cks Xu.Cks
#define edx_md5_ictx edx_ictx.edx_MD5_ictx
#define edx_md5_octx edx_octx.edx_MD5_octx
#define edx_sha1_ictx edx_ictx.edx_SHA1_ictx
#define edx_sha1_octx edx_octx.edx_SHA1_octx
#define edx_rmd160_ictx edx_ictx.edx_RMD160_ictx
#define edx_rmd160_octx edx_octx.edx_RMD160_octx
#define ESP_OLD_FLENGTH 12
#define ESP_NEW_FLENGTH 16
#ifdef _KERNEL
struct espstat espstat;
#endif
|
