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
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
|
/* $OpenBSD: ike.c,v 1.2 2005/09/20 17:29:19 hshoexer Exp $ */
/*
* Copyright (c) 2005 Hans-Joerg Hoexer <hshoexer@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/queue.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <err.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "ipsecctl.h"
static void ike_section_peer(struct ipsec_addr *, FILE *);
static void ike_section_ids(struct ipsec_addr *, struct ipsec_auth *,
FILE *);
static void ike_section_ipsec(struct ipsec_addr *, struct ipsec_addr *,
struct ipsec_addr *, FILE *);
static int ike_section_qm(struct ipsec_addr *, struct ipsec_addr *,
u_int8_t, struct ipsec_transforms *, FILE *);
static int ike_section_mm(struct ipsec_addr *, struct ipsec_transforms *,
FILE *);
static void ike_section_qmids(struct ipsec_addr *, struct ipsec_addr *,
FILE *);
static int ike_connect(u_int8_t, struct ipsec_addr *, struct ipsec_addr *,
FILE *);
static int ike_gen_config(struct ipsec_rule *, FILE *);
static int ike_delete_config(struct ipsec_rule *, FILE *);
int ike_print_config(struct ipsec_rule *, int);
int ike_ipsec_establish(int, struct ipsec_rule *);
#define SET "C set "
#define ADD "C add "
#define DELETE "C rms "
static void
ike_section_peer(struct ipsec_addr *peer, FILE *fd)
{
fprintf(fd, SET "[peer-%s]:Phase=1 force\n", peer->name);
fprintf(fd, SET "[peer-%s]:Address=%s force\n", peer->name, peer->name);
}
static void
ike_section_ids(struct ipsec_addr *peer, struct ipsec_auth *auth, FILE *fd)
{
if (auth == NULL)
return;
if (auth->srcid) {
fprintf(fd, SET "[peer-%s]:ID=%s-ID force\n", peer->name,
"local");
fprintf(fd, SET "[%s-ID]:ID-type=FQDN force\n", "local");
fprintf(fd, SET "[%s-ID]:Name=%s force\n", "local",
auth->srcid);
}
if (auth->dstid) {
fprintf(fd, SET "[peer-%s]:Remote-ID=%s-ID force\n",
peer->name, peer->name);
fprintf(fd, SET "[%s-ID]:ID-type=FQDN force\n", peer->name);
fprintf(fd, SET "[%s-ID]:Name=%s force\n", peer->name,
auth->dstid);
}
}
static void
ike_section_ipsec(struct ipsec_addr *src, struct ipsec_addr *dst, struct
ipsec_addr *peer, FILE *fd)
{
fprintf(fd, SET "[IPsec-%s-%s]:Phase=2 force\n", src->name, dst->name);
fprintf(fd, SET "[IPsec-%s-%s]:ISAKMP-peer=peer-%s force\n", src->name,
dst->name, peer->name);
fprintf(fd, SET "[IPsec-%s-%s]:Configuration=qm-%s-%s force\n",
src->name, dst->name, src->name, dst->name);
fprintf(fd, SET "[IPsec-%s-%s]:Local-ID=lid-%s force\n", src->name,
dst->name, src->name);
fprintf(fd, SET "[IPsec-%s-%s]:Remote-ID=rid-%s force\n", src->name,
dst->name, dst->name);
}
static int
ike_section_qm(struct ipsec_addr *src, struct ipsec_addr *dst, u_int8_t proto,
struct ipsec_transforms *qmxfs, FILE *fd)
{
fprintf(fd, SET "[qm-%s-%s]:EXCHANGE_TYPE=QUICK_MODE force\n",
src->name, dst->name);
fprintf(fd, SET "[qm-%s-%s]:Suites=QM-", src->name, dst->name);
switch (proto) {
case IPSEC_ESP:
fprintf(fd, "ESP");
break;
default:
warnx("illegal protocol %d", proto);
return (-1);
};
fprintf(fd, "-");
if (qmxfs->encxf) {
switch (qmxfs->encxf->id) {
case ENCXF_3DES_CBC:
fprintf(fd, "3DES");
break;
case ENCXF_DES_CBC:
fprintf(fd, "DES");
break;
case ENCXF_AES:
fprintf(fd, "AES");
break;
case ENCXF_BLOWFISH:
fprintf(fd, "BLF");
break;
case ENCXF_CAST128:
fprintf(fd, "CAST");
break;
default:
warnx("illegal transform %s", qmxfs->encxf->name);
return (-1);
};
} else
fprintf(fd, "AES");
fprintf(fd, "-");
if (qmxfs->authxf) {
switch (qmxfs->authxf->id) {
case AUTHXF_HMAC_MD5:
case AUTHXF_MD5:
fprintf(fd, "MD5");
break;
case AUTHXF_HMAC_SHA1:
case AUTHXF_SHA1:
fprintf(fd, "SHA");
break;
case AUTHXF_HMAC_RIPEMD160:
fprintf(fd, "RIPEMD");
break;
case AUTHXF_HMAC_SHA2_256:
fprintf(fd, "SHA2-256");
break;
case AUTHXF_HMAC_SHA2_384:
fprintf(fd, "SHA2-384");
break;
case AUTHXF_HMAC_SHA2_512:
fprintf(fd, "SHA2-512");
break;
default:
warnx("illegal transform %s", qmxfs->authxf->name);
return (-1);
};
} else
fprintf(fd, "SHA2-256");
fprintf(fd, "-PFS-SUITE force\n");
return (0);
}
static int
ike_section_mm(struct ipsec_addr *peer, struct ipsec_transforms *mmxfs,
FILE *fd)
{
if (!(mmxfs->authxf || mmxfs->encxf))
return (0);
fprintf(fd, SET "[peer-%s]:Configuration=mm-%s force\n", peer->name,
peer->name);
fprintf(fd, SET "[mm-%s]:EXCHANGE_TYPE=ID_PROT force\n", peer->name);
fprintf(fd, ADD "[mm-%s]:Transforms=", peer->name);
if (mmxfs->encxf) {
switch (mmxfs->encxf->id) {
case ENCXF_3DES_CBC:
fprintf(fd, "3DES");
break;
case ENCXF_DES_CBC:
fprintf(fd, "DES");
break;
case ENCXF_AES:
fprintf(fd, "AES");
break;
case ENCXF_BLOWFISH:
fprintf(fd, "BLF");
break;
case ENCXF_CAST128:
fprintf(fd, "CAST");
break;
default:
warnx("illegal transform %s", mmxfs->encxf->name);
return (-1);
};
} else
fprintf(fd, "AES");
fprintf(fd, "-");
if (mmxfs->authxf) {
switch (mmxfs->authxf->id) {
case AUTHXF_HMAC_MD5:
case AUTHXF_MD5:
fprintf(fd, "MD5");
break;
case AUTHXF_HMAC_SHA1:
case AUTHXF_SHA1:
fprintf(fd, "SHA");
break;
default:
warnx("illegal transform %s", mmxfs->authxf->name);
return (-1);
};
} else
fprintf(fd, "SHA");
fprintf(fd, "-RSA_SIG\n");
return (0);
}
static void
ike_section_qmids(struct ipsec_addr *src, struct ipsec_addr *dst, FILE *fd)
{
char *mask, *network, *p;
if (src->netaddress) {
mask = inet_ntoa(src->v4mask.mask);
if ((network = strdup(src->name)) == NULL)
err(1, "strdup");
if ((p = strrchr(network, '/')) != NULL)
*p = '\0';
fprintf(fd, SET "[lid-%s]:ID-type=IPV4_ADDR_SUBNET force\n",
src->name);
fprintf(fd, SET "[lid-%s]:Network=%s force\n", src->name,
network);
fprintf(fd, SET "[lid-%s]:Netmask=%s force\n", src->name, mask);
free(network);
} else {
fprintf(fd, SET "[lid-%s]:ID-type=IPV4_ADDR force\n",
src->name);
fprintf(fd, SET "[lid-%s]:Address=%s force\n", src->name,
src->name);
}
if (dst->netaddress) {
mask = inet_ntoa(dst->v4mask.mask);
if ((network = strdup(dst->name)) == NULL)
err(1, "strdup");
if ((p = strrchr(network, '/')) != NULL)
*p = '\0';
fprintf(fd, SET "[rid-%s]:ID-type=IPV4_ADDR_SUBNET force\n",
dst->name);
fprintf(fd, SET "[rid-%s]:Network=%s force\n", dst->name,
network);
fprintf(fd, SET "[rid-%s]:Netmask=%s force\n", dst->name, mask);
free(network);
} else {
fprintf(fd, SET "[rid-%s]:ID-type=IPV4_ADDR force\n",
dst->name);
fprintf(fd, SET "[rid-%s]:Address=%s force\n", dst->name,
dst->name);
}
}
static int
ike_connect(u_int8_t mode, struct ipsec_addr *src, struct ipsec_addr *dst,
FILE *fd)
{
switch (mode) {
case IKE_ACTIVE:
fprintf(fd, ADD "[Phase 2]:Connections=IPsec-%s-%s\n",
src->name, dst->name);
fprintf(fd, "t IPsec-%s-%s\n", src->name, dst->name);
fprintf(fd, "c IPsec-%s-%s\n", src->name, dst->name);
break;
case IKE_PASSIVE:
fprintf(fd, ADD "[Phase 2]:Passive-Connections=IPsec-%s-%s\n",
src->name, dst->name);
break;
default:
return (-1);
}
return (0);
}
static int
ike_gen_config(struct ipsec_rule *r, FILE *fd)
{
ike_section_peer(r->peer, fd);
if (ike_section_mm(r->peer, r->mmxfs, fd) == -1)
return (-1);
ike_section_ids(r->peer, r->auth, fd);
ike_section_ipsec(r->src, r->dst, r->peer, fd);
if (ike_section_qm(r->src, r->dst, r->proto, r->qmxfs, fd) == -1)
return (-1);
ike_section_qmids(r->src, r->dst, fd);
if (ike_connect(r->ikemode, r->src, r->dst, fd) == -1)
return (-1);
return (0);
}
static int
ike_delete_config(struct ipsec_rule *r, FILE *fd)
{
switch (r->ikemode) {
case IKE_ACTIVE:
fprintf(fd, "t IPsec-%s-%s\n", r->src->name, r->dst->name);
break;
case IKE_PASSIVE:
fprintf(fd, DELETE "[Phase 2]\n");
fprintf(fd, "t IPsec-%s-%s\n", r->src->name, r->dst->name);
break;
default:
return (-1);
}
fprintf(fd, DELETE "[peer-%s]\n", r->peer->name);
if (r->auth) {
if (r->auth->srcid)
fprintf(fd, DELETE "[%s-ID]\n", r->auth->srcid);
if (r->auth->dstid)
fprintf(fd, DELETE "[%s-ID]\n", r->auth->dstid);
}
fprintf(fd, DELETE "[IPsec-%s-%s]\n", r->src->name, r->dst->name);
fprintf(fd, DELETE "[qm-%s-%s]\n", r->src->name, r->dst->name);
fprintf(fd, DELETE "[mm-%s]\n", r->peer->name);
fprintf(fd, DELETE "[lid-%s]\n", r->src->name);
fprintf(fd, DELETE "[rid-%s]\n", r->dst->name);
return (0);
}
int
ike_print_config(struct ipsec_rule *r, int opts)
{
return (ike_gen_config(r, stdout));
}
int
ike_ipsec_establish(int action, struct ipsec_rule *r)
{
FILE *fd;
int ret = 0;
if ((fd = fopen("/var/run/isakmpd.fifo", "w")) == NULL)
errx(1, "fopen");
switch (action) {
case ACTION_ADD:
ret = ike_gen_config(r, fd);
break;
case ACTION_DELETE:
ret = ike_delete_config(r, fd);
break;
default:
ret = -1;
}
fclose(fd);
return (ret);
}
|
