|
1
|
<?php
|
|
2
|
/*
|
|
3
|
ipsec.inc
|
|
4
|
Copyright (C) 2007 Scott Ullrich
|
|
5
|
Copyright (C) 2008 Shrew Soft Inc
|
|
6
|
All rights reserved.
|
|
7
|
|
|
8
|
Parts of this code was originally based on vpn_ipsec_sad.php
|
|
9
|
Copyright (C) 2003-2004 Manuel Kasper
|
|
10
|
|
|
11
|
Redistribution and use in source and binary forms, with or without
|
|
12
|
modification, are permitted provided that the following conditions are met:
|
|
13
|
|
|
14
|
1. Redistributions of source code must retain the above copyright notice,
|
|
15
|
this list of conditions and the following disclaimer.
|
|
16
|
|
|
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
|
|
|
21
|
THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
|
|
22
|
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
|
|
23
|
AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
24
|
AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
|
|
25
|
OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
26
|
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
27
|
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
28
|
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
29
|
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
30
|
POSSIBILITY OF SUCH DAMAGE.
|
|
31
|
|
|
32
|
pfSense_BUILDER_BINARIES: /usr/local/sbin/setkey
|
|
33
|
pfSense_MODULE: ipsec
|
|
34
|
|
|
35
|
*/
|
|
36
|
|
|
37
|
/* IPsec defines */
|
|
38
|
$my_identifier_list = array(
|
|
39
|
'myaddress' => array( 'desc' => 'My IP address', 'mobile' => true ),
|
|
40
|
'address' => array( 'desc' => 'IP address', 'mobile' => true ),
|
|
41
|
'fqdn' => array( 'desc' => 'Distinguished name', 'mobile' => true ),
|
|
42
|
'user_fqdn' => array( 'desc' => 'User distinguished name', 'mobile' => true ),
|
|
43
|
'asn1dn' => array( 'desc' => 'ASN.1 distinguished Name', 'mobile' => true ),
|
|
44
|
'keyid tag' => array( 'desc' => 'KeyID tag', 'mobile' => true ),
|
|
45
|
'dyn_dns' => array( 'desc' => 'Dynamic DNS', 'mobile' => true ));
|
|
46
|
|
|
47
|
$peer_identifier_list = array(
|
|
48
|
'peeraddress' => array( 'desc' => 'Peer IP address', 'mobile' => false ),
|
|
49
|
'address' => array( 'desc' => 'IP address', 'mobile' => false ),
|
|
50
|
'fqdn' => array( 'desc' => 'Distinguished name', 'mobile' => true ),
|
|
51
|
'user_fqdn' => array( 'desc' => 'User distinguished name', 'mobile' => true ),
|
|
52
|
'asn1dn' => array( 'desc' => 'ASN.1 distinguished Name', 'mobile' => true ),
|
|
53
|
'keyid tag' => array( 'desc' =>'KeyID tag', 'mobile' => true ));
|
|
54
|
|
|
55
|
$p1_ealgos = array(
|
|
56
|
'aes' => array( 'name' => 'AES', 'keysel' => array( 'lo' => 128, 'hi' => 256, 'step' => 64 ) ),
|
|
57
|
'blowfish' => array( 'name' => 'Blowfish', 'keysel' => array( 'lo' => 128, 'hi' => 256, 'step' => 8 ) ),
|
|
58
|
'3des' => array( 'name' => '3DES' ),
|
|
59
|
'cast128' => array( 'name' => 'CAST128' ),
|
|
60
|
'des' => array( 'name' => 'DES' ));
|
|
61
|
|
|
62
|
$p2_ealgos = array(
|
|
63
|
'aes' => array( 'name' => 'AES', 'keysel' => array( 'lo' => 128, 'hi' => 256, 'step' => 64 ) ),
|
|
64
|
'blowfish' => array( 'name' => 'Blowfish', 'keysel' => array( 'lo' => 128, 'hi' => 256, 'step' => 8 ) ),
|
|
65
|
'3des' => array( 'name' => '3DES' ),
|
|
66
|
'cast128' => array( 'name' => 'CAST128' ),
|
|
67
|
'des' => array( 'name' => 'DES' ));
|
|
68
|
|
|
69
|
$p1_halgos = array(
|
|
70
|
'sha1' => 'SHA1',
|
|
71
|
'md5' => 'MD5');
|
|
72
|
|
|
73
|
$p2_halgos = array(
|
|
74
|
'hmac_sha1' => 'SHA1',
|
|
75
|
'hmac_md5' => 'MD5');
|
|
76
|
|
|
77
|
$p1_authentication_methods = array(
|
|
78
|
'hybrid_rsa_server' => array( 'name' => 'Hybrid RSA + Xauth', 'mobile' => true ),
|
|
79
|
'xauth_rsa_server' => array( 'name' => 'Mutual RSA + Xauth', 'mobile' => true ),
|
|
80
|
'xauth_psk_server' => array( 'name' => 'Mutual PSK + Xauth', 'mobile' => true ),
|
|
81
|
'rsasig' => array( 'name' => 'Mutual RSA', 'mobile' => false ),
|
|
82
|
'pre_shared_key' => array( 'name' => 'Mutual PSK', 'mobile' => false ) );
|
|
83
|
|
|
84
|
$p2_modes = array(
|
|
85
|
'tunnel' => 'Tunnel',
|
|
86
|
'transport' => 'Transport');
|
|
87
|
|
|
88
|
$p2_protos = array(
|
|
89
|
'esp' => 'ESP',
|
|
90
|
'ah' => 'AH');
|
|
91
|
|
|
92
|
$p2_pfskeygroups = array(
|
|
93
|
'0' => 'off',
|
|
94
|
'1' => '1',
|
|
95
|
'2' => '2',
|
|
96
|
'5' => '5');
|
|
97
|
|
|
98
|
/*
|
|
99
|
* ikeid management functions
|
|
100
|
*/
|
|
101
|
|
|
102
|
function ipsec_ikeid_used($ikeid) {
|
|
103
|
global $config;
|
|
104
|
|
|
105
|
foreach ($config['ipsec']['phase1'] as $ph1ent)
|
|
106
|
if( $ikeid == $ph1ent['ikeid'] )
|
|
107
|
return true;
|
|
108
|
|
|
109
|
return false;
|
|
110
|
}
|
|
111
|
|
|
112
|
function ipsec_ikeid_next() {
|
|
113
|
|
|
114
|
$ikeid = 1;
|
|
115
|
while(ipsec_ikeid_used($ikeid))
|
|
116
|
$ikeid++;
|
|
117
|
|
|
118
|
return $ikeid;
|
|
119
|
}
|
|
120
|
|
|
121
|
/*
|
|
122
|
* Return phase1 local address
|
|
123
|
*/
|
|
124
|
function ipsec_get_phase1_src(& $ph1ent) {
|
|
125
|
|
|
126
|
if ($ph1ent['interface']) {
|
|
127
|
if (!is_ipaddr($ph1ent['interface'])) {
|
|
128
|
$if = $ph1ent['interface'];
|
|
129
|
$interfaceip = get_interface_ip($if);
|
|
130
|
} else {
|
|
131
|
$interfaceip=$ph1ent['interface'];
|
|
132
|
}
|
|
133
|
}
|
|
134
|
else {
|
|
135
|
$if = "wan";
|
|
136
|
$interfaceip = get_interface_ip($if);
|
|
137
|
}
|
|
138
|
|
|
139
|
return $interfaceip;
|
|
140
|
}
|
|
141
|
|
|
142
|
/*
|
|
143
|
* Return phase1 local address
|
|
144
|
*/
|
|
145
|
function ipsec_get_phase1_dst(& $ph1ent) {
|
|
146
|
|
|
147
|
$rg = $ph1ent['remote-gateway'];
|
|
148
|
if (!is_ipaddr($rg))
|
|
149
|
return resolve_retry($rg);
|
|
150
|
|
|
151
|
if(!is_ipaddr($rg))
|
|
152
|
return false;
|
|
153
|
|
|
154
|
return $rg;
|
|
155
|
}
|
|
156
|
|
|
157
|
/*
|
|
158
|
* Return phase2 idinfo in cidr format
|
|
159
|
*/
|
|
160
|
function ipsec_idinfo_to_cidr(& $idinfo,$addrbits = false) {
|
|
161
|
global $config;
|
|
162
|
|
|
163
|
switch ($idinfo['type'])
|
|
164
|
{
|
|
165
|
case "address":
|
|
166
|
if ($addrbits)
|
|
167
|
return $idinfo['address']."/32";
|
|
168
|
else
|
|
169
|
return $idinfo['address'];
|
|
170
|
case "network":
|
|
171
|
return $idinfo['address']."/".$idinfo['netbits'];
|
|
172
|
case "none":
|
|
173
|
case "mobile":
|
|
174
|
return "0.0.0.0/0";
|
|
175
|
default:
|
|
176
|
$address = get_interface_ip($idinfo['type']);
|
|
177
|
$netbits = get_interface_subnet($idinfo['type']);
|
|
178
|
$address = gen_subnet($address,$netbits);
|
|
179
|
return $address."/".$netbits;
|
|
180
|
}
|
|
181
|
}
|
|
182
|
|
|
183
|
/*
|
|
184
|
* Return phase2 idinfo in address/netmask format
|
|
185
|
*/
|
|
186
|
function ipsec_idinfo_to_subnet(& $idinfo,$addrbits = false) {
|
|
187
|
global $config;
|
|
188
|
|
|
189
|
switch ($idinfo['type'])
|
|
190
|
{
|
|
191
|
case "address":
|
|
192
|
if ($addrbits)
|
|
193
|
return $idinfo['address']."/255.255.255.255";
|
|
194
|
else
|
|
195
|
return $idinfo['address'];
|
|
196
|
case "none":
|
|
197
|
case "network":
|
|
198
|
return $idinfo['address']."/".gen_subnet_mask($idinfo['netbits']);
|
|
199
|
case "mobile":
|
|
200
|
return "0.0.0.0/0";
|
|
201
|
default:
|
|
202
|
$address = get_interface_ip($idinfo['type']);
|
|
203
|
$netbits = get_interface_subnet($idinfo['type']);
|
|
204
|
$address = gen_subnet($address,$netbits);
|
|
205
|
$netbits = gen_subnet_mask($netbits);
|
|
206
|
return $address."/".netbits;
|
|
207
|
}
|
|
208
|
}
|
|
209
|
|
|
210
|
/*
|
|
211
|
* Return phase2 idinfo in text format
|
|
212
|
*/
|
|
213
|
function ipsec_idinfo_to_text(& $idinfo) {
|
|
214
|
|
|
215
|
switch ($idinfo['type'])
|
|
216
|
{
|
|
217
|
case "address":
|
|
218
|
return $idinfo['address'];
|
|
219
|
case "network":
|
|
220
|
return $idinfo['address']."/".$idinfo['netbits'];
|
|
221
|
case "mobile":
|
|
222
|
return "Mobile Client";
|
|
223
|
case "none":
|
|
224
|
return "None";
|
|
225
|
default:
|
|
226
|
return strtoupper($idinfo['type']);
|
|
227
|
}
|
|
228
|
}
|
|
229
|
|
|
230
|
/*
|
|
231
|
* Return phase1 association for phase2
|
|
232
|
*/
|
|
233
|
function ipsec_lookup_phase1(& $ph2ent,& $ph1ent)
|
|
234
|
{
|
|
235
|
global $config;
|
|
236
|
$a_phase1 = $config['ipsec']['phase1'];
|
|
237
|
|
|
238
|
if (is_array($a_phase1) && count($a_phase1)) {
|
|
239
|
foreach ($a_phase1 as $ph1tmp) {
|
|
240
|
if ($ph1tmp['ikeid'] == $ph2ent['ikeid']) {
|
|
241
|
$ph1ent = $ph1tmp;
|
|
242
|
return $ph1ent;
|
|
243
|
}
|
|
244
|
}
|
|
245
|
}
|
|
246
|
|
|
247
|
return false;
|
|
248
|
}
|
|
249
|
|
|
250
|
/*
|
|
251
|
* Check phase1 communications status
|
|
252
|
*/
|
|
253
|
function ipsec_phase1_status(& $ph1ent) {
|
|
254
|
|
|
255
|
$loc_ip = get_ipsec_tunnel_src($ph1ent);
|
|
256
|
$rmt_ip = $ph1ent['remote-gateway'];
|
|
257
|
|
|
258
|
if(ipsec_lookup_ipsakmp_sa($loc_ip,$rmt_ip))
|
|
259
|
return true;
|
|
260
|
|
|
261
|
return false;
|
|
262
|
}
|
|
263
|
|
|
264
|
/*
|
|
265
|
* Check phase2 communications status
|
|
266
|
*/
|
|
267
|
function ipsec_phase2_status(& $spd,& $sad,& $ph1ent,& $ph2ent) {
|
|
268
|
|
|
269
|
$loc_ip = ipsec_get_phase1_src($ph1ent);
|
|
270
|
$rmt_ip = gethostbyname(ipsec_get_phase1_dst($ph1ent));
|
|
271
|
|
|
272
|
$loc_id = ipsec_idinfo_to_cidr($ph2ent['localid'],true);
|
|
273
|
$rmt_id = ipsec_idinfo_to_cidr($ph2ent['remoteid'],true);
|
|
274
|
|
|
275
|
/* check for established SA in both directions */
|
|
276
|
if( ipsec_lookup_ipsec_sa($spd,$sad,"out",$loc_ip,$rmt_ip,$loc_id,$rmt_id) &&
|
|
277
|
ipsec_lookup_ipsec_sa($spd,$sad,"in",$rmt_ip,$loc_ip,$rmt_id,$loc_id))
|
|
278
|
return true;
|
|
279
|
|
|
280
|
return false;
|
|
281
|
}
|
|
282
|
|
|
283
|
/*
|
|
284
|
* Return ISAKMP SA details
|
|
285
|
*/
|
|
286
|
function ipsec_lookup_isakmp_sa($in_srcip,$in_dstip) {
|
|
287
|
/* TODO : use racconctl to lookup iskamp SA */
|
|
288
|
return NULL;
|
|
289
|
}
|
|
290
|
|
|
291
|
/*
|
|
292
|
* Return IPsec SA details
|
|
293
|
*/
|
|
294
|
function ipsec_lookup_ipsec_sa(& $spd,& $sad,$dir,$in_srcip,$in_dstip,$in_srcid,$in_dstid) {
|
|
295
|
|
|
296
|
/* match the phase1/2 to an SP */
|
|
297
|
|
|
298
|
foreach($spd as $sp) {
|
|
299
|
|
|
300
|
/* match direction */
|
|
301
|
|
|
302
|
if($dir != $sp['dir'])
|
|
303
|
continue;
|
|
304
|
|
|
305
|
/* match IPs */
|
|
306
|
|
|
307
|
if($in_srcip != $sp['src'])
|
|
308
|
continue;
|
|
309
|
if($in_dstip != $sp['dst'])
|
|
310
|
continue;
|
|
311
|
|
|
312
|
/* add netbits for address IDs */
|
|
313
|
|
|
314
|
$sp_srcid = $sp['srcid'];
|
|
315
|
$sp_dstid = $sp['dstid'];
|
|
316
|
|
|
317
|
if (!strstr($sp_srcid,"/"))
|
|
318
|
$sp_srcid .= '/32';
|
|
319
|
if (!strstr($sp_dstid,"/"))
|
|
320
|
$sp_dstid .= '/32';
|
|
321
|
|
|
322
|
/* match IDs */
|
|
323
|
|
|
324
|
if($in_srcid != $sp_srcid)
|
|
325
|
continue;
|
|
326
|
if($in_dstid != $sp_dstid)
|
|
327
|
continue;
|
|
328
|
|
|
329
|
/* match the SP to a unique SA by reqid */
|
|
330
|
|
|
331
|
foreach($sad as $sa) {
|
|
332
|
|
|
333
|
/* match REQIDs */
|
|
334
|
|
|
335
|
if($sa[reqid] != $sp[reqid])
|
|
336
|
continue;
|
|
337
|
|
|
338
|
/* sanitize for NAT-T ports */
|
|
339
|
|
|
340
|
$sa_srcip = $sa['src'];
|
|
341
|
$sa_dstip = $sa['dst'];
|
|
342
|
|
|
343
|
if (strstr($sa_srcip,"["))
|
|
344
|
$sa_srcip = substr($sa_srcip,0,strcspn($sa_srcip,"["));
|
|
345
|
if (strstr($sa_dstip,"["))
|
|
346
|
$sa_dstip = substr($sa_dstip,0,strcspn($sa_dstip,"["));
|
|
347
|
|
|
348
|
/* match IPs */
|
|
349
|
|
|
350
|
if($in_srcip != $sa_srcip)
|
|
351
|
continue;
|
|
352
|
if($in_dstip != $sa_dstip)
|
|
353
|
continue;
|
|
354
|
|
|
355
|
return $sa;
|
|
356
|
}
|
|
357
|
}
|
|
358
|
|
|
359
|
return NULL;
|
|
360
|
}
|
|
361
|
|
|
362
|
/*
|
|
363
|
* Return dump of SPD table
|
|
364
|
*/
|
|
365
|
function ipsec_dump_spd()
|
|
366
|
{
|
|
367
|
$fd = @popen("/usr/local/sbin/setkey -DP", "r");
|
|
368
|
$spd = array();
|
|
369
|
if ($fd) {
|
|
370
|
while (!feof($fd)) {
|
|
371
|
$line = chop(fgets($fd));
|
|
372
|
if (!$line)
|
|
373
|
continue;
|
|
374
|
if ($line == "No SPD entries.")
|
|
375
|
break;
|
|
376
|
if ($line[0] != "\t") {
|
|
377
|
if (is_array($cursp))
|
|
378
|
$spd[] = $cursp;
|
|
379
|
$cursp = array();
|
|
380
|
$linea = explode(" ", $line);
|
|
381
|
$cursp['srcid'] = substr($linea[0], 0, strpos($linea[0], "["));
|
|
382
|
$cursp['dstid'] = substr($linea[1], 0, strpos($linea[1], "["));
|
|
383
|
$i = 0;
|
|
384
|
} else if (is_array($cursp)) {
|
|
385
|
$linea = explode(" ", trim($line));
|
|
386
|
switch($i)
|
|
387
|
{
|
|
388
|
case 1:
|
|
389
|
if ($linea[1] == "none") /* don't show default anti-lockout rule */
|
|
390
|
unset($cursp);
|
|
391
|
else
|
|
392
|
$cursp['dir'] = $linea[0];
|
|
393
|
break;
|
|
394
|
case 2:
|
|
395
|
$upperspec = explode("/", $linea[0]);
|
|
396
|
$cursp['proto'] = $upperspec[0];
|
|
397
|
list($cursp['src'], $cursp['dst']) = explode("-", $upperspec[2]);
|
|
398
|
$cursp['reqid'] = substr($upperspec[3], strpos($upperspec[3], "#")+1);
|
|
399
|
break;
|
|
400
|
}
|
|
401
|
}
|
|
402
|
$i++;
|
|
403
|
}
|
|
404
|
if (is_array($cursp) && count($cursp))
|
|
405
|
$spd[] = $cursp;
|
|
406
|
pclose($fd);
|
|
407
|
}
|
|
408
|
|
|
409
|
return $spd;
|
|
410
|
}
|
|
411
|
|
|
412
|
/*
|
|
413
|
* Return dump of SAD table
|
|
414
|
*/
|
|
415
|
function ipsec_dump_sad()
|
|
416
|
{
|
|
417
|
$fd = @popen("/usr/local/sbin/setkey -D", "r");
|
|
418
|
$sad = array();
|
|
419
|
if ($fd) {
|
|
420
|
while (!feof($fd)) {
|
|
421
|
$line = chop(fgets($fd));
|
|
422
|
if (!$line)
|
|
423
|
continue;
|
|
424
|
if ($line == "No SAD entries.")
|
|
425
|
break;
|
|
426
|
if ($line[0] != "\t")
|
|
427
|
{
|
|
428
|
if (is_array($cursa))
|
|
429
|
$sad[] = $cursa;
|
|
430
|
$cursa = array();
|
|
431
|
list($cursa['src'],$cursa['dst']) = explode(" ", $line);
|
|
432
|
$i = 0;
|
|
433
|
}
|
|
434
|
else
|
|
435
|
{
|
|
436
|
$linea = explode(" ", trim($line));
|
|
437
|
switch ($i) {
|
|
438
|
case 1:
|
|
439
|
$cursa['proto'] = $linea[0];
|
|
440
|
$cursa['spi'] = substr($linea[2], strpos($linea[2], "x")+1, -1);
|
|
441
|
$reqid = substr($linea[3], strpos($linea[3], "=")+1);
|
|
442
|
$cursa['reqid'] = substr($reqid, 0, strcspn($reqid,"("));
|
|
443
|
break;
|
|
444
|
case 2:
|
|
445
|
$cursa['ealgo'] = $linea[1];
|
|
446
|
break;
|
|
447
|
case 3:
|
|
448
|
$cursa['aalgo'] = $linea[1];
|
|
449
|
break;
|
|
450
|
}
|
|
451
|
}
|
|
452
|
$i++;
|
|
453
|
}
|
|
454
|
if (is_array($cursa) && count($cursa))
|
|
455
|
$sad[] = $cursa;
|
|
456
|
pclose($fd);
|
|
457
|
}
|
|
458
|
|
|
459
|
return $sad;
|
|
460
|
}
|
|
461
|
|
|
462
|
function ipsec_mobilekey_sort() {
|
|
463
|
global $config;
|
|
464
|
|
|
465
|
function mobilekeycmp($a, $b) {
|
|
466
|
return strcmp($a['ident'][0], $b['ident'][0]);
|
|
467
|
}
|
|
468
|
|
|
469
|
usort($config['ipsec']['mobilekey'], "mobilekeycmp");
|
|
470
|
}
|
|
471
|
|
|
472
|
function ipsec_get_number_of_phase2($ikeid) {
|
|
473
|
global $config;
|
|
474
|
$a_phase2 = $config['ipsec']['phase2'];
|
|
475
|
|
|
476
|
$nbph2=0;
|
|
477
|
|
|
478
|
if (is_array($a_phase2) && count($a_phase2)) {
|
|
479
|
foreach ($a_phase2 as $ph2tmp) {
|
|
480
|
if ($ph2tmp['ikeid'] == $ikeid) {
|
|
481
|
$nbph2++;
|
|
482
|
}
|
|
483
|
}
|
|
484
|
}
|
|
485
|
|
|
486
|
return $nbph2;
|
|
487
|
}
|
|
488
|
|
|
489
|
?>
|