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c60c7694 | 1 | /* |
8ab33628 | 2 | * Copyright (C) 2008-2019 Tobias Brunner |
6a4ff35c | 3 | * Copyright (C) 2005-2008 Martin Willi |
c60c7694 | 4 | * Copyright (C) 2005 Jan Hutter |
b92f11c3 | 5 | * HSR Hochschule fuer Technik Rapperswil |
c60c7694 MW |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License as published by the | |
9 | * Free Software Foundation; either version 2 of the License, or (at your | |
10 | * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
14 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 | * for more details. | |
16 | */ | |
17 | ||
18 | #include "child_create.h" | |
19 | ||
20 | #include <daemon.h> | |
15a682f4 | 21 | #include <sa/ikev2/keymat_v2.h> |
c60c7694 | 22 | #include <crypto/diffie_hellman.h> |
d002c623 | 23 | #include <credentials/certificates/x509.h> |
c60c7694 | 24 | #include <encoding/payloads/sa_payload.h> |
1fd5383e | 25 | #include <encoding/payloads/ke_payload.h> |
c60c7694 MW |
26 | #include <encoding/payloads/ts_payload.h> |
27 | #include <encoding/payloads/nonce_payload.h> | |
28 | #include <encoding/payloads/notify_payload.h> | |
e196c41b | 29 | #include <encoding/payloads/delete_payload.h> |
866ba8e0 | 30 | #include <processing/jobs/delete_ike_sa_job.h> |
aa9eeb5d | 31 | #include <processing/jobs/inactivity_job.h> |
b92f11c3 | 32 | #include <processing/jobs/initiate_tasks_job.h> |
c60c7694 MW |
33 | |
34 | typedef struct private_child_create_t private_child_create_t; | |
35 | ||
36 | /** | |
37 | * Private members of a child_create_t task. | |
38 | */ | |
39 | struct private_child_create_t { | |
7daf5226 | 40 | |
c60c7694 MW |
41 | /** |
42 | * Public methods and task_t interface. | |
43 | */ | |
44 | child_create_t public; | |
7daf5226 | 45 | |
c60c7694 MW |
46 | /** |
47 | * Assigned IKE_SA. | |
48 | */ | |
49 | ike_sa_t *ike_sa; | |
7daf5226 | 50 | |
c60c7694 MW |
51 | /** |
52 | * Are we the initiator? | |
53 | */ | |
54 | bool initiator; | |
7daf5226 | 55 | |
c60c7694 MW |
56 | /** |
57 | * nonce chosen by us | |
58 | */ | |
59 | chunk_t my_nonce; | |
7daf5226 | 60 | |
c60c7694 MW |
61 | /** |
62 | * nonce chosen by peer | |
63 | */ | |
64 | chunk_t other_nonce; | |
7daf5226 | 65 | |
72376234 RB |
66 | /** |
67 | * nonce generator | |
68 | */ | |
69 | nonce_gen_t *nonceg; | |
70 | ||
c60c7694 | 71 | /** |
e0fe7651 | 72 | * config to create the CHILD_SA from |
c60c7694 | 73 | */ |
e0fe7651 | 74 | child_cfg_t *config; |
7daf5226 | 75 | |
c60c7694 MW |
76 | /** |
77 | * list of proposal candidates | |
78 | */ | |
79 | linked_list_t *proposals; | |
7daf5226 | 80 | |
c60c7694 MW |
81 | /** |
82 | * selected proposal to use for CHILD_SA | |
83 | */ | |
84 | proposal_t *proposal; | |
7daf5226 | 85 | |
c60c7694 MW |
86 | /** |
87 | * traffic selectors for initiators side | |
88 | */ | |
89 | linked_list_t *tsi; | |
7daf5226 | 90 | |
c60c7694 MW |
91 | /** |
92 | * traffic selectors for responders side | |
93 | */ | |
94 | linked_list_t *tsr; | |
7daf5226 | 95 | |
a13c013b MW |
96 | /** |
97 | * source of triggering packet | |
98 | */ | |
99 | traffic_selector_t *packet_tsi; | |
7daf5226 | 100 | |
a13c013b MW |
101 | /** |
102 | * destination of triggering packet | |
103 | */ | |
104 | traffic_selector_t *packet_tsr; | |
7daf5226 | 105 | |
1fd5383e MW |
106 | /** |
107 | * optional diffie hellman exchange | |
108 | */ | |
109 | diffie_hellman_t *dh; | |
7daf5226 | 110 | |
a777155f MW |
111 | /** |
112 | * Applying DH public value failed? | |
113 | */ | |
114 | bool dh_failed; | |
115 | ||
1fd5383e MW |
116 | /** |
117 | * group used for DH exchange | |
118 | */ | |
119 | diffie_hellman_group_t dh_group; | |
7daf5226 | 120 | |
80853d84 MW |
121 | /** |
122 | * IKE_SAs keymat | |
123 | */ | |
a0563846 | 124 | keymat_v2_t *keymat; |
7daf5226 | 125 | |
c60c7694 MW |
126 | /** |
127 | * mode the new CHILD_SA uses (transport/tunnel/beet) | |
128 | */ | |
a341a68f | 129 | ipsec_mode_t mode; |
7daf5226 | 130 | |
55df72e6 MW |
131 | /** |
132 | * peer accepts TFC padding for this SA | |
133 | */ | |
134 | bool tfcv3; | |
135 | ||
d4aad554 TB |
136 | /** |
137 | * IPComp transform to use | |
138 | */ | |
139 | ipcomp_transform_t ipcomp; | |
7daf5226 | 140 | |
d4aad554 TB |
141 | /** |
142 | * IPComp transform proposed or accepted by the other peer | |
143 | */ | |
144 | ipcomp_transform_t ipcomp_received; | |
7daf5226 | 145 | |
f91bd4b9 TB |
146 | /** |
147 | * IPsec protocol | |
148 | */ | |
149 | protocol_id_t proto; | |
150 | ||
d4aad554 | 151 | /** |
3aaf7908 MW |
152 | * Own allocated SPI |
153 | */ | |
b12c53ce | 154 | uint32_t my_spi; |
7daf5226 | 155 | |
3aaf7908 MW |
156 | /** |
157 | * SPI received in proposal | |
158 | */ | |
b12c53ce | 159 | uint32_t other_spi; |
7daf5226 | 160 | |
3aaf7908 MW |
161 | /** |
162 | * Own allocated Compression Parameter Index (CPI) | |
163 | */ | |
b12c53ce | 164 | uint16_t my_cpi; |
7daf5226 | 165 | |
3aaf7908 MW |
166 | /** |
167 | * Other Compression Parameter Index (CPI), received via IPCOMP_SUPPORTED | |
d4aad554 | 168 | */ |
b12c53ce | 169 | uint16_t other_cpi; |
7daf5226 | 170 | |
c60c7694 | 171 | /** |
fafa7698 | 172 | * Data collected to create the CHILD_SA |
c60c7694 | 173 | */ |
fafa7698 | 174 | child_sa_create_t child; |
85b23888 | 175 | |
c60c7694 MW |
176 | /** |
177 | * CHILD_SA which gets established | |
178 | */ | |
179 | child_sa_t *child_sa; | |
7daf5226 | 180 | |
195ada0b MW |
181 | /** |
182 | * successfully established the CHILD? | |
183 | */ | |
184 | bool established; | |
7daf5226 | 185 | |
f669f453 MW |
186 | /** |
187 | * whether the CHILD_SA rekeys an existing one | |
188 | */ | |
189 | bool rekey; | |
82ad53b7 MW |
190 | |
191 | /** | |
192 | * whether we are retrying with another DH group | |
193 | */ | |
194 | bool retry; | |
c60c7694 MW |
195 | }; |
196 | ||
b92f11c3 TB |
197 | /** |
198 | * Schedule a retry if creating the CHILD_SA temporary failed | |
199 | */ | |
200 | static void schedule_delayed_retry(private_child_create_t *this) | |
201 | { | |
202 | child_create_t *task; | |
203 | uint32_t retry; | |
204 | ||
205 | retry = RETRY_INTERVAL - (random() % RETRY_JITTER); | |
206 | ||
207 | task = child_create_create(this->ike_sa, | |
208 | this->config->get_ref(this->config), FALSE, | |
209 | this->packet_tsi, this->packet_tsr); | |
fafa7698 TB |
210 | task->use_reqid(task, this->child.reqid); |
211 | task->use_marks(task, this->child.mark_in, this->child.mark_out); | |
212 | task->use_if_ids(task, this->child.if_id_in, this->child.if_id_out); | |
213 | ||
b92f11c3 TB |
214 | DBG1(DBG_IKE, "creating CHILD_SA failed, trying again in %d seconds", |
215 | retry); | |
216 | this->ike_sa->queue_task_delayed(this->ike_sa, (task_t*)task, retry); | |
217 | } | |
218 | ||
c60c7694 MW |
219 | /** |
220 | * get the nonce from a message | |
221 | */ | |
222 | static status_t get_nonce(message_t *message, chunk_t *nonce) | |
223 | { | |
224 | nonce_payload_t *payload; | |
7daf5226 | 225 | |
3ecfc83c | 226 | payload = (nonce_payload_t*)message->get_payload(message, PLV2_NONCE); |
c60c7694 MW |
227 | if (payload == NULL) |
228 | { | |
229 | return FAILED; | |
230 | } | |
231 | *nonce = payload->get_nonce(payload); | |
232 | return NEED_MORE; | |
233 | } | |
234 | ||
235 | /** | |
236 | * generate a new nonce to include in a CREATE_CHILD_SA message | |
237 | */ | |
252f2ef8 | 238 | static bool generate_nonce(private_child_create_t *this) |
c60c7694 | 239 | { |
32df0d81 | 240 | this->nonceg = this->keymat->keymat.create_nonce_gen(&this->keymat->keymat); |
252f2ef8 TB |
241 | if (!this->nonceg) |
242 | { | |
243 | DBG1(DBG_IKE, "no nonce generator found to create nonce"); | |
244 | return FALSE; | |
245 | } | |
72376234 RB |
246 | if (!this->nonceg->allocate_nonce(this->nonceg, NONCE_SIZE, |
247 | &this->my_nonce)) | |
605985d1 RB |
248 | { |
249 | DBG1(DBG_IKE, "nonce allocation failed"); | |
252f2ef8 | 250 | return FALSE; |
605985d1 | 251 | } |
252f2ef8 | 252 | return TRUE; |
c60c7694 MW |
253 | } |
254 | ||
255 | /** | |
256 | * Check a list of traffic selectors if any selector belongs to host | |
257 | */ | |
258 | static bool ts_list_is_host(linked_list_t *list, host_t *host) | |
259 | { | |
260 | traffic_selector_t *ts; | |
261 | bool is_host = TRUE; | |
e2630434 | 262 | enumerator_t *enumerator = list->create_enumerator(list); |
7daf5226 | 263 | |
e2630434 | 264 | while (is_host && enumerator->enumerate(enumerator, (void**)&ts)) |
c60c7694 MW |
265 | { |
266 | is_host = is_host && ts->is_host(ts, host); | |
267 | } | |
e2630434 | 268 | enumerator->destroy(enumerator); |
c60c7694 MW |
269 | return is_host; |
270 | } | |
271 | ||
3aaf7908 | 272 | /** |
7754c714 | 273 | * Allocate local SPI |
3aaf7908 MW |
274 | */ |
275 | static bool allocate_spi(private_child_create_t *this) | |
276 | { | |
3aaf7908 | 277 | proposal_t *proposal; |
7daf5226 | 278 | |
cdab8630 MW |
279 | if (this->initiator) |
280 | { | |
f91bd4b9 | 281 | this->proto = PROTO_ESP; |
cdab8630 MW |
282 | /* we just get a SPI for the first protocol. TODO: If we ever support |
283 | * proposal lists with mixed protocols, we'd need multiple SPIs */ | |
284 | if (this->proposals->get_first(this->proposals, | |
285 | (void**)&proposal) == SUCCESS) | |
286 | { | |
f91bd4b9 | 287 | this->proto = proposal->get_protocol(proposal); |
cdab8630 MW |
288 | } |
289 | } | |
290 | else | |
291 | { | |
f91bd4b9 | 292 | this->proto = this->proposal->get_protocol(this->proposal); |
cdab8630 | 293 | } |
f91bd4b9 | 294 | this->my_spi = this->child_sa->alloc_spi(this->child_sa, this->proto); |
7754c714 TB |
295 | return this->my_spi != 0; |
296 | } | |
297 | ||
298 | /** | |
299 | * Update the proposals with the allocated SPIs as initiator and check the DH | |
300 | * group and promote it if necessary | |
301 | */ | |
302 | static bool update_and_check_proposals(private_child_create_t *this) | |
303 | { | |
304 | enumerator_t *enumerator; | |
305 | proposal_t *proposal; | |
306 | linked_list_t *other_dh_groups; | |
307 | bool found = FALSE; | |
308 | ||
309 | other_dh_groups = linked_list_create(); | |
310 | enumerator = this->proposals->create_enumerator(this->proposals); | |
311 | while (enumerator->enumerate(enumerator, &proposal)) | |
3aaf7908 | 312 | { |
7754c714 TB |
313 | proposal->set_spi(proposal, this->my_spi); |
314 | ||
315 | /* move the selected DH group to the front, if any */ | |
316 | if (this->dh_group != MODP_NONE) | |
317 | { /* proposals that don't contain the selected group are | |
318 | * moved to the back */ | |
319 | if (!proposal->promote_dh_group(proposal, this->dh_group)) | |
3aaf7908 | 320 | { |
7754c714 TB |
321 | this->proposals->remove_at(this->proposals, enumerator); |
322 | other_dh_groups->insert_last(other_dh_groups, proposal); | |
5a259ade | 323 | } |
7754c714 TB |
324 | else |
325 | { | |
326 | found = TRUE; | |
3aaf7908 | 327 | } |
3aaf7908 | 328 | } |
3aaf7908 | 329 | } |
7754c714 TB |
330 | enumerator->destroy(enumerator); |
331 | enumerator = other_dh_groups->create_enumerator(other_dh_groups); | |
332 | while (enumerator->enumerate(enumerator, (void**)&proposal)) | |
333 | { /* no need to remove from the list as we destroy it anyway*/ | |
334 | this->proposals->insert_last(this->proposals, proposal); | |
335 | } | |
336 | enumerator->destroy(enumerator); | |
337 | other_dh_groups->destroy(other_dh_groups); | |
338 | ||
339 | return this->dh_group == MODP_NONE || found; | |
3aaf7908 MW |
340 | } |
341 | ||
aa9eeb5d MW |
342 | /** |
343 | * Schedule inactivity timeout for CHILD_SA with reqid, if enabled | |
344 | */ | |
71da0017 | 345 | static void schedule_inactivity_timeout(private_child_create_t *this) |
aa9eeb5d | 346 | { |
b12c53ce | 347 | uint32_t timeout, id; |
aa9eeb5d MW |
348 | bool close_ike; |
349 | ||
71da0017 | 350 | timeout = this->config->get_inactivity(this->config); |
aa9eeb5d MW |
351 | if (timeout) |
352 | { | |
353 | close_ike = lib->settings->get_bool(lib->settings, | |
d223fe80 | 354 | "%s.inactivity_close_ike", FALSE, lib->ns); |
85ace154 | 355 | id = this->child_sa->get_unique_id(this->child_sa); |
bb381e26 | 356 | lib->scheduler->schedule_job(lib->scheduler, (job_t*) |
85ace154 | 357 | inactivity_job_create(id, timeout, close_ike), timeout); |
aa9eeb5d MW |
358 | } |
359 | } | |
360 | ||
7d82aaea MW |
361 | /** |
362 | * Check if we have a an address pool configured | |
363 | */ | |
364 | static bool have_pool(ike_sa_t *ike_sa) | |
365 | { | |
366 | enumerator_t *enumerator; | |
367 | peer_cfg_t *peer_cfg; | |
368 | char *pool; | |
369 | bool found = FALSE; | |
370 | ||
371 | peer_cfg = ike_sa->get_peer_cfg(ike_sa); | |
372 | if (peer_cfg) | |
373 | { | |
374 | enumerator = peer_cfg->create_pool_enumerator(peer_cfg); | |
375 | if (enumerator->enumerate(enumerator, &pool)) | |
376 | { | |
377 | found = TRUE; | |
378 | } | |
379 | enumerator->destroy(enumerator); | |
380 | } | |
381 | return found; | |
382 | } | |
383 | ||
101d26ba | 384 | /** |
7ee37114 | 385 | * Get hosts to use for dynamic traffic selectors |
101d26ba | 386 | */ |
7ee37114 | 387 | static linked_list_t *get_dynamic_hosts(ike_sa_t *ike_sa, bool local) |
101d26ba MW |
388 | { |
389 | enumerator_t *enumerator; | |
7ee37114 | 390 | linked_list_t *list; |
101d26ba MW |
391 | host_t *host; |
392 | ||
7ee37114 | 393 | list = linked_list_create(); |
101d26ba | 394 | enumerator = ike_sa->create_virtual_ip_enumerator(ike_sa, local); |
7ee37114 | 395 | while (enumerator->enumerate(enumerator, &host)) |
101d26ba | 396 | { |
7ee37114 MW |
397 | list->insert_last(list, host); |
398 | } | |
399 | enumerator->destroy(enumerator); | |
400 | ||
401 | if (list->get_count(list) == 0) | |
402 | { /* no virtual IPs assigned */ | |
101d26ba MW |
403 | if (local) |
404 | { | |
405 | host = ike_sa->get_my_host(ike_sa); | |
7ee37114 | 406 | list->insert_last(list, host); |
101d26ba | 407 | } |
7ee37114 MW |
408 | else if (!have_pool(ike_sa)) |
409 | { /* use host only if we don't have a pool configured */ | |
410 | host = ike_sa->get_other_host(ike_sa); | |
411 | list->insert_last(list, host); | |
101d26ba MW |
412 | } |
413 | } | |
7ee37114 | 414 | return list; |
101d26ba MW |
415 | } |
416 | ||
975457c4 | 417 | /** |
2db6d5b8 | 418 | * Substitute any host address with NATed address in traffic selector |
975457c4 MW |
419 | */ |
420 | static linked_list_t* get_transport_nat_ts(private_child_create_t *this, | |
421 | bool local, linked_list_t *in) | |
422 | { | |
423 | enumerator_t *enumerator; | |
424 | linked_list_t *out; | |
425 | traffic_selector_t *ts; | |
426 | host_t *ike, *first = NULL; | |
b12c53ce | 427 | uint8_t mask; |
975457c4 MW |
428 | |
429 | if (local) | |
430 | { | |
431 | ike = this->ike_sa->get_my_host(this->ike_sa); | |
432 | } | |
433 | else | |
434 | { | |
435 | ike = this->ike_sa->get_other_host(this->ike_sa); | |
436 | } | |
437 | ||
438 | out = linked_list_create(); | |
439 | ||
440 | enumerator = in->create_enumerator(in); | |
441 | while (enumerator->enumerate(enumerator, &ts)) | |
442 | { | |
443 | /* require that all selectors match the first "host" selector */ | |
444 | if (ts->is_host(ts, first)) | |
445 | { | |
446 | if (!first) | |
447 | { | |
448 | ts->to_subnet(ts, &first, &mask); | |
449 | } | |
450 | ts = ts->clone(ts); | |
451 | ts->set_address(ts, ike); | |
452 | out->insert_last(out, ts); | |
453 | } | |
454 | } | |
455 | enumerator->destroy(enumerator); | |
456 | DESTROY_IF(first); | |
457 | ||
458 | return out; | |
459 | } | |
460 | ||
461 | /** | |
462 | * Narrow received traffic selectors with configuration | |
463 | */ | |
464 | static linked_list_t* narrow_ts(private_child_create_t *this, bool local, | |
465 | linked_list_t *in) | |
466 | { | |
467 | linked_list_t *hosts, *nat, *ts; | |
468 | ike_condition_t cond; | |
469 | ||
470 | cond = local ? COND_NAT_HERE : COND_NAT_THERE; | |
471 | hosts = get_dynamic_hosts(this->ike_sa, local); | |
472 | ||
473 | if (this->mode == MODE_TRANSPORT && | |
474 | this->ike_sa->has_condition(this->ike_sa, cond)) | |
475 | { | |
476 | nat = get_transport_nat_ts(this, local, in); | |
84cdfbc9 TB |
477 | ts = this->config->get_traffic_selectors(this->config, local, nat, |
478 | hosts, TRUE); | |
975457c4 MW |
479 | nat->destroy_offset(nat, offsetof(traffic_selector_t, destroy)); |
480 | } | |
481 | else | |
482 | { | |
84cdfbc9 TB |
483 | ts = this->config->get_traffic_selectors(this->config, local, in, |
484 | hosts, TRUE); | |
975457c4 MW |
485 | } |
486 | ||
487 | hosts->destroy(hosts); | |
488 | ||
489 | return ts; | |
490 | } | |
491 | ||
a3885b86 TB |
492 | /** |
493 | * Check if requested mode is acceptable | |
494 | */ | |
495 | static bool check_mode(private_child_create_t *this, host_t *i, host_t *r) | |
496 | { | |
497 | switch (this->mode) | |
498 | { | |
499 | case MODE_TRANSPORT: | |
500 | if (!this->config->has_option(this->config, OPT_PROXY_MODE) && | |
501 | (!ts_list_is_host(this->tsi, i) || | |
502 | !ts_list_is_host(this->tsr, r)) | |
503 | ) | |
504 | { | |
505 | DBG1(DBG_IKE, "not using transport mode, not host-to-host"); | |
506 | return FALSE; | |
507 | } | |
508 | if (this->config->get_mode(this->config) != MODE_TRANSPORT) | |
509 | { | |
510 | return FALSE; | |
511 | } | |
512 | break; | |
513 | case MODE_BEET: | |
514 | if (!ts_list_is_host(this->tsi, NULL) || | |
515 | !ts_list_is_host(this->tsr, NULL)) | |
516 | { | |
517 | DBG1(DBG_IKE, "not using BEET mode, not host-to-host"); | |
518 | return FALSE; | |
519 | } | |
520 | if (this->config->get_mode(this->config) != MODE_BEET) | |
521 | { | |
522 | return FALSE; | |
523 | } | |
524 | break; | |
525 | default: | |
526 | break; | |
527 | } | |
528 | return TRUE; | |
529 | } | |
530 | ||
c60c7694 | 531 | /** |
1fd5383e MW |
532 | * Install a CHILD_SA for usage, return value: |
533 | * - FAILED: no acceptable proposal | |
2ad1df95 TB |
534 | * - INVALID_ARG: diffie hellman group unacceptable |
535 | * - NOT_FOUND: TS unacceptable | |
c60c7694 | 536 | */ |
be715344 MW |
537 | static status_t select_and_install(private_child_create_t *this, |
538 | bool no_dh, bool ike_auth) | |
c60c7694 | 539 | { |
ecb32c75 | 540 | status_t status, status_i, status_o; |
15e745cf | 541 | child_sa_outbound_state_t out_state; |
b59f154b AS |
542 | chunk_t nonce_i, nonce_r; |
543 | chunk_t encr_i = chunk_empty, encr_r = chunk_empty; | |
544 | chunk_t integ_i = chunk_empty, integ_r = chunk_empty; | |
975457c4 | 545 | linked_list_t *my_ts, *other_ts; |
101d26ba | 546 | host_t *me, *other; |
f930b732 | 547 | proposal_selection_flag_t flags = 0; |
7daf5226 | 548 | |
1fd5383e | 549 | if (this->proposals == NULL) |
c60c7694 | 550 | { |
a985db3f | 551 | DBG1(DBG_IKE, "SA payload missing in message"); |
c60c7694 MW |
552 | return FAILED; |
553 | } | |
1fd5383e MW |
554 | if (this->tsi == NULL || this->tsr == NULL) |
555 | { | |
a985db3f | 556 | DBG1(DBG_IKE, "TS payloads missing in message"); |
1fd5383e MW |
557 | return NOT_FOUND; |
558 | } | |
7daf5226 | 559 | |
c60c7694 MW |
560 | me = this->ike_sa->get_my_host(this->ike_sa); |
561 | other = this->ike_sa->get_other_host(this->ike_sa); | |
7daf5226 | 562 | |
f930b732 TE |
563 | if (no_dh) |
564 | { | |
a406bc60 | 565 | flags |= PROPOSAL_SKIP_DH; |
f930b732 | 566 | } |
05e373ae TE |
567 | if (!this->ike_sa->supports_extension(this->ike_sa, EXT_STRONGSWAN) && |
568 | !lib->settings->get_bool(lib->settings, "%s.accept_private_algs", | |
569 | FALSE, lib->ns)) | |
f930b732 | 570 | { |
a2cb2c9c | 571 | flags |= PROPOSAL_SKIP_PRIVATE; |
f930b732 | 572 | } |
c9599d41 TB |
573 | if (!lib->settings->get_bool(lib->settings, |
574 | "%s.prefer_configured_proposals", TRUE, lib->ns)) | |
f930b732 | 575 | { |
c9599d41 | 576 | flags |= PROPOSAL_PREFER_SUPPLIED; |
f930b732 | 577 | } |
023fd8f1 | 578 | this->proposal = this->config->select_proposal(this->config, |
f930b732 | 579 | this->proposals, flags); |
6e1be427 MW |
580 | if (this->proposal == NULL) |
581 | { | |
a985db3f | 582 | DBG1(DBG_IKE, "no acceptable proposal found"); |
5dd9c308 MW |
583 | charon->bus->alert(charon->bus, ALERT_PROPOSAL_MISMATCH_CHILD, |
584 | this->proposals); | |
6e1be427 MW |
585 | return FAILED; |
586 | } | |
3aaf7908 | 587 | this->other_spi = this->proposal->get_spi(this->proposal); |
7daf5226 | 588 | |
7754c714 TB |
589 | if (!this->initiator) |
590 | { | |
591 | if (!allocate_spi(this)) | |
592 | { | |
593 | /* responder has no SPI allocated yet */ | |
594 | DBG1(DBG_IKE, "allocating SPI failed"); | |
595 | return FAILED; | |
596 | } | |
597 | this->proposal->set_spi(this->proposal, this->my_spi); | |
3aaf7908 MW |
598 | } |
599 | this->child_sa->set_proposal(this->child_sa, this->proposal); | |
7daf5226 | 600 | |
1fd5383e MW |
601 | if (!this->proposal->has_dh_group(this->proposal, this->dh_group)) |
602 | { | |
b12c53ce | 603 | uint16_t group; |
7daf5226 | 604 | |
1fd5383e | 605 | if (this->proposal->get_algorithm(this->proposal, DIFFIE_HELLMAN_GROUP, |
3c7e72f5 | 606 | &group, NULL)) |
1fd5383e | 607 | { |
2ad1df95 | 608 | DBG1(DBG_IKE, "DH group %N unacceptable, requesting %N", |
a985db3f MW |
609 | diffie_hellman_group_names, this->dh_group, |
610 | diffie_hellman_group_names, group); | |
1fd5383e MW |
611 | this->dh_group = group; |
612 | return INVALID_ARG; | |
613 | } | |
1f6a707d MW |
614 | /* the selected proposal does not use a DH group */ |
615 | DBG1(DBG_IKE, "ignoring KE exchange, agreed on a non-PFS proposal"); | |
616 | DESTROY_IF(this->dh); | |
617 | this->dh = NULL; | |
618 | this->dh_group = MODP_NONE; | |
1fd5383e | 619 | } |
7daf5226 | 620 | |
80853d84 MW |
621 | if (this->initiator) |
622 | { | |
5dffdea1 MW |
623 | nonce_i = this->my_nonce; |
624 | nonce_r = this->other_nonce; | |
975457c4 MW |
625 | my_ts = narrow_ts(this, TRUE, this->tsi); |
626 | other_ts = narrow_ts(this, FALSE, this->tsr); | |
80853d84 MW |
627 | } |
628 | else | |
629 | { | |
5dffdea1 MW |
630 | nonce_r = this->my_nonce; |
631 | nonce_i = this->other_nonce; | |
975457c4 MW |
632 | my_ts = narrow_ts(this, TRUE, this->tsr); |
633 | other_ts = narrow_ts(this, FALSE, this->tsi); | |
80853d84 | 634 | } |
7daf5226 | 635 | |
be715344 MW |
636 | if (this->initiator) |
637 | { | |
638 | if (ike_auth) | |
639 | { | |
640 | charon->bus->narrow(charon->bus, this->child_sa, | |
641 | NARROW_INITIATOR_POST_NOAUTH, my_ts, other_ts); | |
642 | } | |
643 | else | |
644 | { | |
645 | charon->bus->narrow(charon->bus, this->child_sa, | |
646 | NARROW_INITIATOR_POST_AUTH, my_ts, other_ts); | |
647 | } | |
648 | } | |
649 | else | |
650 | { | |
651 | charon->bus->narrow(charon->bus, this->child_sa, | |
652 | NARROW_RESPONDER, my_ts, other_ts); | |
653 | } | |
654 | ||
e0fe7651 MW |
655 | if (my_ts->get_count(my_ts) == 0 || other_ts->get_count(other_ts) == 0) |
656 | { | |
24f30ec9 | 657 | charon->bus->alert(charon->bus, ALERT_TS_MISMATCH, this->tsi, this->tsr); |
16878f68 MW |
658 | my_ts->destroy_offset(my_ts, offsetof(traffic_selector_t, destroy)); |
659 | other_ts->destroy_offset(other_ts, offsetof(traffic_selector_t, destroy)); | |
a985db3f | 660 | DBG1(DBG_IKE, "no acceptable traffic selectors found"); |
1fd5383e | 661 | return NOT_FOUND; |
c60c7694 | 662 | } |
7daf5226 | 663 | |
c60c7694 MW |
664 | this->tsr->destroy_offset(this->tsr, offsetof(traffic_selector_t, destroy)); |
665 | this->tsi->destroy_offset(this->tsi, offsetof(traffic_selector_t, destroy)); | |
666 | if (this->initiator) | |
667 | { | |
668 | this->tsi = my_ts; | |
669 | this->tsr = other_ts; | |
a3885b86 TB |
670 | |
671 | if (!check_mode(this, me, other)) | |
672 | { | |
673 | DBG1(DBG_IKE, "%N mode requested by responder is unacceptable", | |
674 | ipsec_mode_names, this->mode); | |
675 | return FAILED; | |
676 | } | |
c60c7694 MW |
677 | } |
678 | else | |
679 | { | |
680 | this->tsr = my_ts; | |
681 | this->tsi = other_ts; | |
a3885b86 TB |
682 | |
683 | if (!check_mode(this, other, me)) | |
684 | { | |
685 | this->mode = MODE_TUNNEL; | |
686 | } | |
c60c7694 | 687 | } |
7daf5226 | 688 | |
c60c7694 MW |
689 | if (!this->initiator) |
690 | { | |
b00bcb9a TB |
691 | /* use a copy of the traffic selectors, as the POST hook should not |
692 | * change payloads */ | |
693 | my_ts = this->tsr->clone_offset(this->tsr, | |
694 | offsetof(traffic_selector_t, clone)); | |
695 | other_ts = this->tsi->clone_offset(this->tsi, | |
696 | offsetof(traffic_selector_t, clone)); | |
697 | charon->bus->narrow(charon->bus, this->child_sa, | |
698 | NARROW_RESPONDER_POST, my_ts, other_ts); | |
699 | ||
700 | if (my_ts->get_count(my_ts) == 0 || other_ts->get_count(other_ts) == 0) | |
701 | { | |
702 | my_ts->destroy_offset(my_ts, | |
703 | offsetof(traffic_selector_t, destroy)); | |
704 | other_ts->destroy_offset(other_ts, | |
705 | offsetof(traffic_selector_t, destroy)); | |
706 | return NOT_FOUND; | |
707 | } | |
c60c7694 | 708 | } |
7daf5226 | 709 | |
4989aba8 TB |
710 | this->child_sa->set_policies(this->child_sa, my_ts, other_ts); |
711 | if (!this->initiator) | |
712 | { | |
713 | my_ts->destroy_offset(my_ts, | |
714 | offsetof(traffic_selector_t, destroy)); | |
715 | other_ts->destroy_offset(other_ts, | |
716 | offsetof(traffic_selector_t, destroy)); | |
717 | } | |
718 | ||
ea625fab | 719 | this->child_sa->set_state(this->child_sa, CHILD_INSTALLING); |
3aaf7908 MW |
720 | this->child_sa->set_ipcomp(this->child_sa, this->ipcomp); |
721 | this->child_sa->set_mode(this->child_sa, this->mode); | |
722 | this->child_sa->set_protocol(this->child_sa, | |
723 | this->proposal->get_protocol(this->proposal)); | |
7daf5226 | 724 | |
3aaf7908 | 725 | if (this->my_cpi == 0 || this->other_cpi == 0 || this->ipcomp == IPCOMP_NONE) |
d4aad554 | 726 | { |
3aaf7908 MW |
727 | this->my_cpi = this->other_cpi = 0; |
728 | this->ipcomp = IPCOMP_NONE; | |
d4aad554 | 729 | } |
ecb32c75 | 730 | status_i = status_o = FAILED; |
5dffdea1 | 731 | if (this->keymat->derive_child_keys(this->keymat, this->proposal, |
6ec949e0 | 732 | this->dh, nonce_i, nonce_r, &encr_i, &integ_i, &encr_r, &integ_r)) |
c60c7694 | 733 | { |
5dffdea1 | 734 | if (this->initiator) |
80853d84 | 735 | { |
a8c94544 MW |
736 | status_i = this->child_sa->install(this->child_sa, encr_r, integ_r, |
737 | this->my_spi, this->my_cpi, this->initiator, | |
4989aba8 | 738 | TRUE, this->tfcv3); |
80853d84 | 739 | } |
15e745cf | 740 | else |
80853d84 | 741 | { |
a8c94544 MW |
742 | status_i = this->child_sa->install(this->child_sa, encr_i, integ_i, |
743 | this->my_spi, this->my_cpi, this->initiator, | |
4989aba8 | 744 | TRUE, this->tfcv3); |
15e745cf TB |
745 | } |
746 | if (this->rekey) | |
747 | { /* during rekeyings we install the outbound SA and/or policies | |
748 | * separately: as responder when we receive the delete for the old | |
749 | * SA, as initiator pretty much immediately in the ike-rekey task, | |
750 | * unless there was a rekey collision that we lost */ | |
751 | if (this->initiator) | |
752 | { | |
753 | status_o = this->child_sa->register_outbound(this->child_sa, | |
754 | encr_i, integ_i, this->other_spi, this->other_cpi, | |
755 | this->tfcv3); | |
756 | } | |
757 | else | |
758 | { | |
759 | status_o = this->child_sa->register_outbound(this->child_sa, | |
760 | encr_r, integ_r, this->other_spi, this->other_cpi, | |
761 | this->tfcv3); | |
762 | } | |
763 | } | |
764 | else if (this->initiator) | |
765 | { | |
766 | status_o = this->child_sa->install(this->child_sa, encr_i, integ_i, | |
a8c94544 | 767 | this->other_spi, this->other_cpi, this->initiator, |
4989aba8 | 768 | FALSE, this->tfcv3); |
80853d84 | 769 | } |
dc3710e9 | 770 | else |
15e745cf TB |
771 | { |
772 | status_o = this->child_sa->install(this->child_sa, encr_r, integ_r, | |
773 | this->other_spi, this->other_cpi, this->initiator, | |
774 | FALSE, this->tfcv3); | |
dc3710e9 | 775 | } |
c60c7694 | 776 | } |
7daf5226 | 777 | |
ecb32c75 | 778 | if (status_i != SUCCESS || status_o != SUCCESS) |
c60c7694 | 779 | { |
ecb32c75 AS |
780 | DBG1(DBG_IKE, "unable to install %s%s%sIPsec SA (SAD) in kernel", |
781 | (status_i != SUCCESS) ? "inbound " : "", | |
782 | (status_i != SUCCESS && status_o != SUCCESS) ? "and ": "", | |
783 | (status_o != SUCCESS) ? "outbound " : ""); | |
bcf3147e MW |
784 | charon->bus->alert(charon->bus, ALERT_INSTALL_CHILD_SA_FAILED, |
785 | this->child_sa); | |
0e80f5c3 | 786 | status = FAILED; |
f942588f MW |
787 | } |
788 | else | |
789 | { | |
4989aba8 | 790 | status = this->child_sa->install_policies(this->child_sa); |
b00bcb9a | 791 | |
0e80f5c3 | 792 | if (status != SUCCESS) |
f942588f | 793 | { |
0e80f5c3 TB |
794 | DBG1(DBG_IKE, "unable to install IPsec policies (SPD) in kernel"); |
795 | charon->bus->alert(charon->bus, ALERT_INSTALL_CHILD_POLICY_FAILED, | |
796 | this->child_sa); | |
797 | status = NOT_FOUND; | |
f942588f MW |
798 | } |
799 | else | |
800 | { | |
0e80f5c3 TB |
801 | charon->bus->child_derived_keys(charon->bus, this->child_sa, |
802 | this->initiator, encr_i, encr_r, | |
803 | integ_i, integ_r); | |
f942588f | 804 | } |
f942588f | 805 | } |
0e80f5c3 TB |
806 | chunk_clear(&integ_i); |
807 | chunk_clear(&integ_r); | |
808 | chunk_clear(&encr_i); | |
809 | chunk_clear(&encr_r); | |
810 | ||
ea625fab | 811 | if (status != SUCCESS) |
7daf5226 | 812 | { |
0e80f5c3 | 813 | return status; |
ea625fab | 814 | } |
7daf5226 | 815 | |
b2e447e2 MW |
816 | charon->bus->child_keys(charon->bus, this->child_sa, this->initiator, |
817 | this->dh, nonce_i, nonce_r); | |
7daf5226 | 818 | |
553bb787 MW |
819 | my_ts = linked_list_create_from_enumerator( |
820 | this->child_sa->create_ts_enumerator(this->child_sa, TRUE)); | |
821 | other_ts = linked_list_create_from_enumerator( | |
822 | this->child_sa->create_ts_enumerator(this->child_sa, FALSE)); | |
15e745cf | 823 | out_state = this->child_sa->get_outbound_state(this->child_sa); |
553bb787 | 824 | |
dc3710e9 | 825 | DBG0(DBG_IKE, "%sCHILD_SA %s{%d} established " |
ebeb8c87 | 826 | "with SPIs %.8x_i %.8x_o and TS %#R === %#R", |
15e745cf | 827 | (out_state == CHILD_OUTBOUND_INSTALLED) ? "" : "inbound ", |
553bb787 | 828 | this->child_sa->get_name(this->child_sa), |
246c969d | 829 | this->child_sa->get_unique_id(this->child_sa), |
553bb787 | 830 | ntohl(this->child_sa->get_spi(this->child_sa, TRUE)), |
dc3710e9 TB |
831 | ntohl(this->child_sa->get_spi(this->child_sa, FALSE)), |
832 | my_ts, other_ts); | |
553bb787 MW |
833 | |
834 | my_ts->destroy(my_ts); | |
835 | other_ts->destroy(other_ts); | |
a0cde769 TB |
836 | |
837 | this->child_sa->set_state(this->child_sa, CHILD_INSTALLED); | |
838 | this->ike_sa->add_child_sa(this->ike_sa, this->child_sa); | |
839 | this->established = TRUE; | |
840 | ||
841 | schedule_inactivity_timeout(this); | |
c60c7694 MW |
842 | return SUCCESS; |
843 | } | |
844 | ||
845 | /** | |
846 | * build the payloads for the message | |
847 | */ | |
520d58e0 | 848 | static bool build_payloads(private_child_create_t *this, message_t *message) |
c60c7694 MW |
849 | { |
850 | sa_payload_t *sa_payload; | |
c60c7694 | 851 | nonce_payload_t *nonce_payload; |
1fd5383e MW |
852 | ke_payload_t *ke_payload; |
853 | ts_payload_t *ts_payload; | |
5c55be49 | 854 | kernel_feature_t features; |
c60c7694 MW |
855 | |
856 | /* add SA payload */ | |
857 | if (this->initiator) | |
858 | { | |
e174e0d4 | 859 | sa_payload = sa_payload_create_from_proposals_v2(this->proposals); |
c60c7694 MW |
860 | } |
861 | else | |
862 | { | |
e174e0d4 | 863 | sa_payload = sa_payload_create_from_proposal_v2(this->proposal); |
c60c7694 MW |
864 | } |
865 | message->add_payload(message, (payload_t*)sa_payload); | |
7daf5226 | 866 | |
c60c7694 MW |
867 | /* add nonce payload if not in IKE_AUTH */ |
868 | if (message->get_exchange_type(message) == CREATE_CHILD_SA) | |
869 | { | |
3ecfc83c | 870 | nonce_payload = nonce_payload_create(PLV2_NONCE); |
c60c7694 MW |
871 | nonce_payload->set_nonce(nonce_payload, this->my_nonce); |
872 | message->add_payload(message, (payload_t*)nonce_payload); | |
873 | } | |
7daf5226 | 874 | |
1fd5383e MW |
875 | /* diffie hellman exchange, if PFS enabled */ |
876 | if (this->dh) | |
877 | { | |
3ecfc83c | 878 | ke_payload = ke_payload_create_from_diffie_hellman(PLV2_KEY_EXCHANGE, |
683d83ed | 879 | this->dh); |
520d58e0 MW |
880 | if (!ke_payload) |
881 | { | |
882 | DBG1(DBG_IKE, "creating KE payload failed"); | |
883 | return FALSE; | |
884 | } | |
1fd5383e MW |
885 | message->add_payload(message, (payload_t*)ke_payload); |
886 | } | |
7daf5226 | 887 | |
c676f2e2 MW |
888 | /* add TSi/TSr payloads */ |
889 | ts_payload = ts_payload_create_from_traffic_selectors(TRUE, this->tsi); | |
890 | message->add_payload(message, (payload_t*)ts_payload); | |
891 | ts_payload = ts_payload_create_from_traffic_selectors(FALSE, this->tsr); | |
892 | message->add_payload(message, (payload_t*)ts_payload); | |
893 | ||
c60c7694 MW |
894 | /* add a notify if we are not in tunnel mode */ |
895 | switch (this->mode) | |
896 | { | |
897 | case MODE_TRANSPORT: | |
898 | message->add_notify(message, FALSE, USE_TRANSPORT_MODE, chunk_empty); | |
899 | break; | |
900 | case MODE_BEET: | |
901 | message->add_notify(message, FALSE, USE_BEET_MODE, chunk_empty); | |
902 | break; | |
903 | default: | |
904 | break; | |
905 | } | |
5c55be49 | 906 | |
8394ea2a | 907 | features = charon->kernel->get_features(charon->kernel); |
5c55be49 MW |
908 | if (!(features & KERNEL_ESP_V3_TFC)) |
909 | { | |
910 | message->add_notify(message, FALSE, ESP_TFC_PADDING_NOT_SUPPORTED, | |
911 | chunk_empty); | |
912 | } | |
520d58e0 | 913 | return TRUE; |
c60c7694 MW |
914 | } |
915 | ||
d4aad554 | 916 | /** |
3aaf7908 | 917 | * Adds an IPCOMP_SUPPORTED notify to the message, allocating a CPI |
d4aad554 | 918 | */ |
3aaf7908 | 919 | static void add_ipcomp_notify(private_child_create_t *this, |
b12c53ce | 920 | message_t *message, uint8_t ipcomp) |
d4aad554 | 921 | { |
3aaf7908 MW |
922 | this->my_cpi = this->child_sa->alloc_cpi(this->child_sa); |
923 | if (this->my_cpi) | |
d4aad554 | 924 | { |
3aaf7908 | 925 | this->ipcomp = ipcomp; |
7daf5226 | 926 | message->add_notify(message, FALSE, IPCOMP_SUPPORTED, |
3aaf7908 MW |
927 | chunk_cata("cc", chunk_from_thing(this->my_cpi), |
928 | chunk_from_thing(ipcomp))); | |
d4aad554 TB |
929 | } |
930 | else | |
931 | { | |
d510eaea | 932 | DBG1(DBG_IKE, "unable to allocate a CPI from kernel, IPComp disabled"); |
3aaf7908 MW |
933 | } |
934 | } | |
935 | ||
936 | /** | |
937 | * handle a received notify payload | |
938 | */ | |
939 | static void handle_notify(private_child_create_t *this, notify_payload_t *notify) | |
940 | { | |
941 | switch (notify->get_notify_type(notify)) | |
942 | { | |
943 | case USE_TRANSPORT_MODE: | |
944 | this->mode = MODE_TRANSPORT; | |
945 | break; | |
946 | case USE_BEET_MODE: | |
b3349c56 MW |
947 | if (this->ike_sa->supports_extension(this->ike_sa, EXT_STRONGSWAN)) |
948 | { /* handle private use notify only if we know its meaning */ | |
949 | this->mode = MODE_BEET; | |
950 | } | |
951 | else | |
952 | { | |
953 | DBG1(DBG_IKE, "received a notify strongSwan uses for BEET " | |
954 | "mode, but peer implementation unknown, skipped"); | |
955 | } | |
3aaf7908 MW |
956 | break; |
957 | case IPCOMP_SUPPORTED: | |
958 | { | |
959 | ipcomp_transform_t ipcomp; | |
b12c53ce | 960 | uint16_t cpi; |
3aaf7908 | 961 | chunk_t data; |
7daf5226 | 962 | |
3aaf7908 | 963 | data = notify->get_notification_data(notify); |
b12c53ce | 964 | cpi = *(uint16_t*)data.ptr; |
3aaf7908 MW |
965 | ipcomp = (ipcomp_transform_t)(*(data.ptr + 2)); |
966 | switch (ipcomp) | |
967 | { | |
968 | case IPCOMP_DEFLATE: | |
969 | this->other_cpi = cpi; | |
970 | this->ipcomp_received = ipcomp; | |
971 | break; | |
972 | case IPCOMP_LZS: | |
973 | case IPCOMP_LZJH: | |
974 | default: | |
975 | DBG1(DBG_IKE, "received IPCOMP_SUPPORTED notify with a " | |
976 | "transform ID we don't support %N", | |
977 | ipcomp_transform_names, ipcomp); | |
978 | break; | |
979 | } | |
55df72e6 | 980 | break; |
3aaf7908 | 981 | } |
55df72e6 MW |
982 | case ESP_TFC_PADDING_NOT_SUPPORTED: |
983 | DBG1(DBG_IKE, "received %N, not using ESPv3 TFC padding", | |
984 | notify_type_names, notify->get_notify_type(notify)); | |
985 | this->tfcv3 = FALSE; | |
986 | break; | |
3aaf7908 MW |
987 | default: |
988 | break; | |
d4aad554 TB |
989 | } |
990 | } | |
991 | ||
c60c7694 MW |
992 | /** |
993 | * Read payloads from message | |
994 | */ | |
995 | static void process_payloads(private_child_create_t *this, message_t *message) | |
996 | { | |
a44bb934 | 997 | enumerator_t *enumerator; |
c60c7694 MW |
998 | payload_t *payload; |
999 | sa_payload_t *sa_payload; | |
1fd5383e | 1000 | ke_payload_t *ke_payload; |
c60c7694 | 1001 | ts_payload_t *ts_payload; |
7daf5226 | 1002 | |
c60c7694 MW |
1003 | /* defaults to TUNNEL mode */ |
1004 | this->mode = MODE_TUNNEL; | |
1005 | ||
a44bb934 MW |
1006 | enumerator = message->create_payload_enumerator(message); |
1007 | while (enumerator->enumerate(enumerator, &payload)) | |
c60c7694 MW |
1008 | { |
1009 | switch (payload->get_type(payload)) | |
1010 | { | |
3ecfc83c | 1011 | case PLV2_SECURITY_ASSOCIATION: |
c60c7694 MW |
1012 | sa_payload = (sa_payload_t*)payload; |
1013 | this->proposals = sa_payload->get_proposals(sa_payload); | |
1014 | break; | |
3ecfc83c | 1015 | case PLV2_KEY_EXCHANGE: |
1fd5383e MW |
1016 | ke_payload = (ke_payload_t*)payload; |
1017 | if (!this->initiator) | |
1018 | { | |
1019 | this->dh_group = ke_payload->get_dh_group_number(ke_payload); | |
a0563846 TB |
1020 | this->dh = this->keymat->keymat.create_dh( |
1021 | &this->keymat->keymat, this->dh_group); | |
1fd5383e | 1022 | } |
ecbcfbda TB |
1023 | else if (this->dh) |
1024 | { | |
1025 | this->dh_failed = this->dh->get_dh_group(this->dh) != | |
1026 | ke_payload->get_dh_group_number(ke_payload); | |
1027 | } | |
1028 | if (this->dh && !this->dh_failed) | |
1fd5383e | 1029 | { |
a777155f | 1030 | this->dh_failed = !this->dh->set_other_public_value(this->dh, |
1fd5383e MW |
1031 | ke_payload->get_key_exchange_data(ke_payload)); |
1032 | } | |
1033 | break; | |
3ecfc83c | 1034 | case PLV2_TS_INITIATOR: |
c60c7694 MW |
1035 | ts_payload = (ts_payload_t*)payload; |
1036 | this->tsi = ts_payload->get_traffic_selectors(ts_payload); | |
7daf5226 | 1037 | break; |
3ecfc83c | 1038 | case PLV2_TS_RESPONDER: |
c60c7694 MW |
1039 | ts_payload = (ts_payload_t*)payload; |
1040 | this->tsr = ts_payload->get_traffic_selectors(ts_payload); | |
1041 | break; | |
3ecfc83c | 1042 | case PLV2_NOTIFY: |
3aaf7908 | 1043 | handle_notify(this, (notify_payload_t*)payload); |
c60c7694 MW |
1044 | break; |
1045 | default: | |
1046 | break; | |
1047 | } | |
1048 | } | |
a44bb934 | 1049 | enumerator->destroy(enumerator); |
c60c7694 MW |
1050 | } |
1051 | ||
ed521a74 TB |
1052 | /** |
1053 | * Check if we should defer the creation of this CHILD_SA until after the | |
1054 | * IKE_SA has been established childless. | |
1055 | */ | |
1056 | static status_t defer_child_sa(private_child_create_t *this) | |
1057 | { | |
1058 | ike_cfg_t *ike_cfg; | |
1059 | ||
1060 | ike_cfg = this->ike_sa->get_ike_cfg(this->ike_sa); | |
1061 | ||
1062 | if (this->ike_sa->supports_extension(this->ike_sa, EXT_IKE_CHILDLESS)) | |
1063 | { | |
1064 | if (ike_cfg->childless(ike_cfg) == CHILDLESS_FORCE) | |
1065 | { | |
1066 | return NEED_MORE; | |
1067 | } | |
1068 | } | |
1069 | else if (ike_cfg->childless(ike_cfg) == CHILDLESS_FORCE) | |
1070 | { | |
1071 | DBG1(DBG_IKE, "peer does not support childless IKE_SA initiation"); | |
1072 | return DESTROY_ME; | |
1073 | } | |
1074 | return NOT_SUPPORTED; | |
1075 | } | |
1076 | ||
cf16a29d AS |
1077 | METHOD(task_t, build_i, status_t, |
1078 | private_child_create_t *this, message_t *message) | |
c60c7694 | 1079 | { |
101d26ba MW |
1080 | enumerator_t *enumerator; |
1081 | host_t *vip; | |
e0fe7651 | 1082 | peer_cfg_t *peer_cfg; |
7ee37114 | 1083 | linked_list_t *list; |
7daf5226 | 1084 | |
c60c7694 MW |
1085 | switch (message->get_exchange_type(message)) |
1086 | { | |
1087 | case IKE_SA_INIT: | |
1088 | return get_nonce(message, &this->my_nonce); | |
1089 | case CREATE_CHILD_SA: | |
252f2ef8 | 1090 | if (!generate_nonce(this)) |
c60c7694 | 1091 | { |
252f2ef8 TB |
1092 | message->add_notify(message, FALSE, NO_PROPOSAL_CHOSEN, |
1093 | chunk_empty); | |
c60c7694 MW |
1094 | return SUCCESS; |
1095 | } | |
f8e53003 TB |
1096 | if (!this->retry && this->dh_group == MODP_NONE) |
1097 | { /* during a rekeying the group might already be set */ | |
1fd5383e MW |
1098 | this->dh_group = this->config->get_dh_group(this->config); |
1099 | } | |
9b8b3e5f | 1100 | break; |
49e8ac05 | 1101 | case IKE_AUTH: |
a44bb934 | 1102 | if (message->get_message_id(message) != 1) |
49e8ac05 | 1103 | { |
a44bb934 | 1104 | /* send only in the first request, not in subsequent rounds */ |
49e8ac05 MW |
1105 | return NEED_MORE; |
1106 | } | |
ed521a74 TB |
1107 | switch (defer_child_sa(this)) |
1108 | { | |
1109 | case DESTROY_ME: | |
1110 | /* config mismatch */ | |
1111 | return DESTROY_ME; | |
1112 | case NEED_MORE: | |
1113 | /* defer until after IKE_SA has been established */ | |
1114 | chunk_free(&this->my_nonce); | |
1115 | return NEED_MORE; | |
1116 | default: | |
1117 | /* just continue to establish the CHILD_SA */ | |
1118 | break; | |
1119 | } | |
c60c7694 MW |
1120 | break; |
1121 | default: | |
1122 | break; | |
1123 | } | |
7daf5226 | 1124 | |
419201c1 | 1125 | /* check if we want a virtual IP, but don't have one */ |
7ee37114 | 1126 | list = linked_list_create(); |
b81d8cd3 | 1127 | peer_cfg = this->ike_sa->get_peer_cfg(this->ike_sa); |
4469e3d0 | 1128 | if (!this->rekey) |
419201c1 | 1129 | { |
7ee37114 MW |
1130 | enumerator = peer_cfg->create_virtual_ip_enumerator(peer_cfg); |
1131 | while (enumerator->enumerate(enumerator, &vip)) | |
1132 | { | |
1133 | /* propose a 0.0.0.0/0 or ::/0 subnet when we use virtual ip */ | |
1134 | vip = host_create_any(vip->get_family(vip)); | |
1135 | list->insert_last(list, vip); | |
1136 | } | |
1137 | enumerator->destroy(enumerator); | |
1138 | } | |
1139 | if (list->get_count(list)) | |
1140 | { | |
1141 | this->tsi = this->config->get_traffic_selectors(this->config, | |
84cdfbc9 | 1142 | TRUE, NULL, list, TRUE); |
7ee37114 | 1143 | list->destroy_offset(list, offsetof(host_t, destroy)); |
c60c7694 MW |
1144 | } |
1145 | else | |
7ee37114 MW |
1146 | { /* no virtual IPs configured */ |
1147 | list->destroy(list); | |
1148 | list = get_dynamic_hosts(this->ike_sa, TRUE); | |
1149 | this->tsi = this->config->get_traffic_selectors(this->config, | |
84cdfbc9 | 1150 | TRUE, NULL, list, TRUE); |
7ee37114 | 1151 | list->destroy(list); |
c60c7694 | 1152 | } |
7ee37114 MW |
1153 | list = get_dynamic_hosts(this->ike_sa, FALSE); |
1154 | this->tsr = this->config->get_traffic_selectors(this->config, | |
84cdfbc9 | 1155 | FALSE, NULL, list, TRUE); |
7ee37114 | 1156 | list->destroy(list); |
7daf5226 | 1157 | |
a13c013b MW |
1158 | if (this->packet_tsi) |
1159 | { | |
1160 | this->tsi->insert_first(this->tsi, | |
1161 | this->packet_tsi->clone(this->packet_tsi)); | |
1162 | } | |
1163 | if (this->packet_tsr) | |
1164 | { | |
1165 | this->tsr->insert_first(this->tsr, | |
1166 | this->packet_tsr->clone(this->packet_tsr)); | |
1167 | } | |
1fd5383e MW |
1168 | this->proposals = this->config->get_proposals(this->config, |
1169 | this->dh_group == MODP_NONE); | |
e0fe7651 | 1170 | this->mode = this->config->get_mode(this->config); |
7daf5226 | 1171 | |
fafa7698 TB |
1172 | this->child.if_id_in_def = this->ike_sa->get_if_id(this->ike_sa, TRUE); |
1173 | this->child.if_id_out_def = this->ike_sa->get_if_id(this->ike_sa, FALSE); | |
1174 | this->child.encap = this->ike_sa->has_condition(this->ike_sa, COND_NAT_ANY); | |
ad3af574 | 1175 | this->child_sa = child_sa_create(this->ike_sa->get_my_host(this->ike_sa), |
fafa7698 TB |
1176 | this->ike_sa->get_other_host(this->ike_sa), |
1177 | this->config, &this->child); | |
7daf5226 | 1178 | |
fafa7698 | 1179 | if (this->child.reqid) |
7bcd48d1 TB |
1180 | { |
1181 | DBG0(DBG_IKE, "establishing CHILD_SA %s{%d} reqid %d", | |
1182 | this->child_sa->get_name(this->child_sa), | |
fafa7698 | 1183 | this->child_sa->get_unique_id(this->child_sa), this->child.reqid); |
7bcd48d1 TB |
1184 | } |
1185 | else | |
1186 | { | |
1187 | DBG0(DBG_IKE, "establishing CHILD_SA %s{%d}", | |
1188 | this->child_sa->get_name(this->child_sa), | |
1189 | this->child_sa->get_unique_id(this->child_sa)); | |
1190 | } | |
1191 | ||
3aaf7908 | 1192 | if (!allocate_spi(this)) |
c60c7694 | 1193 | { |
a985db3f | 1194 | DBG1(DBG_IKE, "unable to allocate SPIs from kernel"); |
c60c7694 MW |
1195 | return FAILED; |
1196 | } | |
7daf5226 | 1197 | |
7754c714 TB |
1198 | if (!update_and_check_proposals(this)) |
1199 | { | |
1200 | DBG1(DBG_IKE, "requested DH group %N not contained in any of our " | |
1201 | "proposals", | |
1202 | diffie_hellman_group_names, this->dh_group); | |
1203 | return FAILED; | |
1204 | } | |
1205 | ||
1fd5383e MW |
1206 | if (this->dh_group != MODP_NONE) |
1207 | { | |
a0563846 TB |
1208 | this->dh = this->keymat->keymat.create_dh(&this->keymat->keymat, |
1209 | this->dh_group); | |
1fd5383e | 1210 | } |
7daf5226 | 1211 | |
749ac175 | 1212 | if (this->config->has_option(this->config, OPT_IPCOMP)) |
3aaf7908 | 1213 | { |
d4aad554 | 1214 | /* IPCOMP_DEFLATE is the only transform we support at the moment */ |
3aaf7908 | 1215 | add_ipcomp_notify(this, message, IPCOMP_DEFLATE); |
d4aad554 | 1216 | } |
7daf5226 | 1217 | |
be715344 MW |
1218 | if (message->get_exchange_type(message) == IKE_AUTH) |
1219 | { | |
1220 | charon->bus->narrow(charon->bus, this->child_sa, | |
1221 | NARROW_INITIATOR_PRE_NOAUTH, this->tsi, this->tsr); | |
1222 | } | |
1223 | else | |
1224 | { | |
1225 | charon->bus->narrow(charon->bus, this->child_sa, | |
1226 | NARROW_INITIATOR_PRE_AUTH, this->tsi, this->tsr); | |
1227 | } | |
1228 | ||
520d58e0 MW |
1229 | if (!build_payloads(this, message)) |
1230 | { | |
1231 | return FAILED; | |
1232 | } | |
7daf5226 | 1233 | |
c60c7694 MW |
1234 | this->tsi->destroy_offset(this->tsi, offsetof(traffic_selector_t, destroy)); |
1235 | this->tsr->destroy_offset(this->tsr, offsetof(traffic_selector_t, destroy)); | |
1236 | this->proposals->destroy_offset(this->proposals, offsetof(proposal_t, destroy)); | |
1237 | this->tsi = NULL; | |
1238 | this->tsr = NULL; | |
1239 | this->proposals = NULL; | |
7daf5226 | 1240 | |
c60c7694 MW |
1241 | return NEED_MORE; |
1242 | } | |
1243 | ||
cf16a29d AS |
1244 | METHOD(task_t, process_r, status_t, |
1245 | private_child_create_t *this, message_t *message) | |
c60c7694 MW |
1246 | { |
1247 | switch (message->get_exchange_type(message)) | |
1248 | { | |
1249 | case IKE_SA_INIT: | |
1250 | return get_nonce(message, &this->other_nonce); | |
1251 | case CREATE_CHILD_SA: | |
1252 | get_nonce(message, &this->other_nonce); | |
1253 | break; | |
49e8ac05 | 1254 | case IKE_AUTH: |
a44bb934 | 1255 | if (message->get_message_id(message) != 1) |
49e8ac05 | 1256 | { |
a44bb934 | 1257 | /* only handle first AUTH payload, not additional rounds */ |
49e8ac05 MW |
1258 | return NEED_MORE; |
1259 | } | |
c60c7694 MW |
1260 | default: |
1261 | break; | |
1262 | } | |
7daf5226 | 1263 | |
c60c7694 | 1264 | process_payloads(this, message); |
7daf5226 | 1265 | |
c60c7694 MW |
1266 | return NEED_MORE; |
1267 | } | |
1268 | ||
866ba8e0 MW |
1269 | /** |
1270 | * handle CHILD_SA setup failure | |
1271 | */ | |
1272 | static void handle_child_sa_failure(private_child_create_t *this, | |
1273 | message_t *message) | |
1274 | { | |
8262be3c AKR |
1275 | bool is_first; |
1276 | ||
1277 | is_first = message->get_exchange_type(message) == IKE_AUTH; | |
1278 | if (is_first && | |
866ba8e0 | 1279 | lib->settings->get_bool(lib->settings, |
d223fe80 | 1280 | "%s.close_ike_on_child_failure", FALSE, lib->ns)) |
866ba8e0 MW |
1281 | { |
1282 | /* we delay the delete for 100ms, as the IKE_AUTH response must arrive | |
1283 | * first */ | |
1284 | DBG1(DBG_IKE, "closing IKE_SA due CHILD_SA setup failure"); | |
bb381e26 | 1285 | lib->scheduler->schedule_job_ms(lib->scheduler, (job_t*) |
866ba8e0 MW |
1286 | delete_ike_sa_job_create(this->ike_sa->get_id(this->ike_sa), TRUE), |
1287 | 100); | |
1288 | } | |
5d549cd4 TB |
1289 | else |
1290 | { | |
1291 | DBG1(DBG_IKE, "failed to establish CHILD_SA, keeping IKE_SA"); | |
8262be3c AKR |
1292 | charon->bus->alert(charon->bus, ALERT_KEEP_ON_CHILD_SA_FAILURE, |
1293 | is_first); | |
5d549cd4 | 1294 | } |
866ba8e0 MW |
1295 | } |
1296 | ||
975457c4 MW |
1297 | /** |
1298 | * Substitute transport mode NAT selectors, if applicable | |
1299 | */ | |
1300 | static linked_list_t* get_ts_if_nat_transport(private_child_create_t *this, | |
1301 | bool local, linked_list_t *in) | |
1302 | { | |
1303 | linked_list_t *out = NULL; | |
1304 | ike_condition_t cond; | |
1305 | ||
1306 | if (this->mode == MODE_TRANSPORT) | |
1307 | { | |
1308 | cond = local ? COND_NAT_HERE : COND_NAT_THERE; | |
1309 | if (this->ike_sa->has_condition(this->ike_sa, cond)) | |
1310 | { | |
1311 | out = get_transport_nat_ts(this, local, in); | |
1312 | if (out->get_count(out) == 0) | |
1313 | { | |
1314 | out->destroy(out); | |
1315 | out = NULL; | |
1316 | } | |
1317 | } | |
1318 | } | |
1319 | return out; | |
1320 | } | |
1321 | ||
1322 | /** | |
1323 | * Select a matching CHILD config as responder | |
1324 | */ | |
1325 | static child_cfg_t* select_child_cfg(private_child_create_t *this) | |
1326 | { | |
1327 | peer_cfg_t *peer_cfg; | |
1328 | child_cfg_t *child_cfg = NULL;; | |
1329 | ||
1330 | peer_cfg = this->ike_sa->get_peer_cfg(this->ike_sa); | |
1331 | if (peer_cfg && this->tsi && this->tsr) | |
1332 | { | |
1333 | linked_list_t *listr, *listi, *tsr, *tsi; | |
1334 | ||
1335 | tsr = get_ts_if_nat_transport(this, TRUE, this->tsr); | |
1336 | tsi = get_ts_if_nat_transport(this, FALSE, this->tsi); | |
1337 | ||
1338 | listr = get_dynamic_hosts(this->ike_sa, TRUE); | |
1339 | listi = get_dynamic_hosts(this->ike_sa, FALSE); | |
1340 | child_cfg = peer_cfg->select_child_cfg(peer_cfg, | |
1341 | tsr ?: this->tsr, tsi ?: this->tsi, | |
1342 | listr, listi); | |
1343 | if ((tsi || tsr) && child_cfg && | |
1344 | child_cfg->get_mode(child_cfg) != MODE_TRANSPORT) | |
1345 | { | |
1346 | /* found a CHILD config, but it doesn't use transport mode */ | |
1347 | child_cfg->destroy(child_cfg); | |
1348 | child_cfg = NULL; | |
1349 | } | |
1350 | if (!child_cfg && (tsi || tsr)) | |
1351 | { | |
1352 | /* no match for the substituted NAT selectors, try it without */ | |
1353 | child_cfg = peer_cfg->select_child_cfg(peer_cfg, | |
1354 | this->tsr, this->tsi, listr, listi); | |
1355 | } | |
1356 | listr->destroy(listr); | |
1357 | listi->destroy(listi); | |
1358 | DESTROY_OFFSET_IF(tsi, offsetof(traffic_selector_t, destroy)); | |
1359 | DESTROY_OFFSET_IF(tsr, offsetof(traffic_selector_t, destroy)); | |
1360 | } | |
1361 | ||
1362 | return child_cfg; | |
1363 | } | |
1364 | ||
ed521a74 TB |
1365 | /** |
1366 | * Check how to handle a possibly childless IKE_SA | |
1367 | */ | |
1368 | static status_t handle_childless(private_child_create_t *this) | |
1369 | { | |
1370 | ike_cfg_t *ike_cfg; | |
1371 | ||
1372 | ike_cfg = this->ike_sa->get_ike_cfg(this->ike_sa); | |
1373 | ||
1374 | if (!this->proposals && !this->tsi && !this->tsr) | |
1375 | { | |
1376 | /* looks like a childless IKE_SA, check if we allow it */ | |
1377 | if (ike_cfg->childless(ike_cfg) == CHILDLESS_NEVER) | |
1378 | { | |
1379 | /* we don't allow childless initiation */ | |
1380 | DBG1(DBG_IKE, "peer tried to initiate a childless IKE_SA"); | |
1381 | return INVALID_STATE; | |
1382 | } | |
1383 | return SUCCESS; | |
1384 | } | |
1385 | ||
1386 | /* the peer apparently wants to create a regular IKE_SA */ | |
1387 | if (ike_cfg->childless(ike_cfg) == CHILDLESS_FORCE) | |
1388 | { | |
1389 | /* reject it if we only allow childless initiation */ | |
1390 | DBG1(DBG_IKE, "peer did not initiate a childless IKE_SA"); | |
1391 | return INVALID_STATE; | |
1392 | } | |
1393 | return NOT_SUPPORTED; | |
1394 | } | |
1395 | ||
cf16a29d AS |
1396 | METHOD(task_t, build_r, status_t, |
1397 | private_child_create_t *this, message_t *message) | |
c60c7694 | 1398 | { |
d510eaea | 1399 | payload_t *payload; |
a44bb934 | 1400 | enumerator_t *enumerator; |
be715344 | 1401 | bool no_dh = TRUE, ike_auth = FALSE; |
7daf5226 | 1402 | |
c60c7694 MW |
1403 | switch (message->get_exchange_type(message)) |
1404 | { | |
1405 | case IKE_SA_INIT: | |
1406 | return get_nonce(message, &this->my_nonce); | |
1407 | case CREATE_CHILD_SA: | |
252f2ef8 | 1408 | if (!generate_nonce(this)) |
a777155f MW |
1409 | { |
1410 | message->add_notify(message, FALSE, NO_PROPOSAL_CHOSEN, | |
1411 | chunk_empty); | |
1412 | return SUCCESS; | |
1413 | } | |
1414 | if (this->dh_failed) | |
c60c7694 | 1415 | { |
a777155f | 1416 | DBG1(DBG_IKE, "applying DH public value failed"); |
866ba8e0 MW |
1417 | message->add_notify(message, FALSE, NO_PROPOSAL_CHOSEN, |
1418 | chunk_empty); | |
c60c7694 MW |
1419 | return SUCCESS; |
1420 | } | |
1fd5383e | 1421 | no_dh = FALSE; |
c60c7694 | 1422 | break; |
49e8ac05 | 1423 | case IKE_AUTH: |
a44bb934 MW |
1424 | if (this->ike_sa->get_state(this->ike_sa) != IKE_ESTABLISHED) |
1425 | { /* wait until all authentication round completed */ | |
49e8ac05 MW |
1426 | return NEED_MORE; |
1427 | } | |
b6fcb917 TB |
1428 | if (this->ike_sa->has_condition(this->ike_sa, COND_REDIRECTED)) |
1429 | { /* no CHILD_SA is created for redirected SAs */ | |
1430 | return SUCCESS; | |
1431 | } | |
ed521a74 TB |
1432 | switch (handle_childless(this)) |
1433 | { | |
1434 | case SUCCESS: | |
1435 | /* no CHILD_SA built */ | |
1436 | return SUCCESS; | |
1437 | case INVALID_STATE: | |
1438 | message->add_notify(message, FALSE, INVALID_SYNTAX, | |
1439 | chunk_empty); | |
1440 | return FAILED; | |
1441 | default: | |
1442 | /* continue with regular initiation */ | |
1443 | break; | |
1444 | } | |
be715344 | 1445 | ike_auth = TRUE; |
c60c7694 MW |
1446 | default: |
1447 | break; | |
1448 | } | |
7daf5226 | 1449 | |
0f33e826 MW |
1450 | if (this->ike_sa->get_state(this->ike_sa) == IKE_REKEYING) |
1451 | { | |
a985db3f | 1452 | DBG1(DBG_IKE, "unable to create CHILD_SA while rekeying IKE_SA"); |
869b7075 | 1453 | message->add_notify(message, TRUE, TEMPORARY_FAILURE, chunk_empty); |
0f33e826 MW |
1454 | return SUCCESS; |
1455 | } | |
f02cabbe MW |
1456 | if (this->ike_sa->get_state(this->ike_sa) == IKE_DELETING) |
1457 | { | |
1458 | DBG1(DBG_IKE, "unable to create CHILD_SA while deleting IKE_SA"); | |
869b7075 | 1459 | message->add_notify(message, TRUE, TEMPORARY_FAILURE, chunk_empty); |
f02cabbe MW |
1460 | return SUCCESS; |
1461 | } | |
7daf5226 | 1462 | |
975457c4 | 1463 | if (this->config == NULL) |
a44bb934 | 1464 | { |
975457c4 | 1465 | this->config = select_child_cfg(this); |
a44bb934 | 1466 | } |
e0fe7651 | 1467 | if (this->config == NULL) |
c60c7694 | 1468 | { |
2ad1df95 | 1469 | DBG1(DBG_IKE, "traffic selectors %#R === %#R unacceptable", |
a985db3f | 1470 | this->tsr, this->tsi); |
24f30ec9 | 1471 | charon->bus->alert(charon->bus, ALERT_TS_MISMATCH, this->tsi, this->tsr); |
e0fe7651 | 1472 | message->add_notify(message, FALSE, TS_UNACCEPTABLE, chunk_empty); |
866ba8e0 | 1473 | handle_child_sa_failure(this, message); |
c60c7694 MW |
1474 | return SUCCESS; |
1475 | } | |
7daf5226 | 1476 | |
d510eaea | 1477 | /* check if ike_config_t included non-critical error notifies */ |
a44bb934 MW |
1478 | enumerator = message->create_payload_enumerator(message); |
1479 | while (enumerator->enumerate(enumerator, &payload)) | |
d510eaea | 1480 | { |
3ecfc83c | 1481 | if (payload->get_type(payload) == PLV2_NOTIFY) |
d510eaea MW |
1482 | { |
1483 | notify_payload_t *notify = (notify_payload_t*)payload; | |
7daf5226 | 1484 | |
d510eaea MW |
1485 | switch (notify->get_notify_type(notify)) |
1486 | { | |
1487 | case INTERNAL_ADDRESS_FAILURE: | |
1488 | case FAILED_CP_REQUIRED: | |
1489 | { | |
84545f6e | 1490 | DBG1(DBG_IKE,"configuration payload negotiation " |
a985db3f | 1491 | "failed, no CHILD_SA built"); |
a44bb934 | 1492 | enumerator->destroy(enumerator); |
866ba8e0 | 1493 | handle_child_sa_failure(this, message); |
d510eaea MW |
1494 | return SUCCESS; |
1495 | } | |
1496 | default: | |
1497 | break; | |
1498 | } | |
1499 | } | |
1500 | } | |
a44bb934 | 1501 | enumerator->destroy(enumerator); |
7daf5226 | 1502 | |
fafa7698 TB |
1503 | this->child.if_id_in_def = this->ike_sa->get_if_id(this->ike_sa, TRUE); |
1504 | this->child.if_id_out_def = this->ike_sa->get_if_id(this->ike_sa, FALSE); | |
1505 | this->child.encap = this->ike_sa->has_condition(this->ike_sa, COND_NAT_ANY); | |
ad3af574 | 1506 | this->child_sa = child_sa_create(this->ike_sa->get_my_host(this->ike_sa), |
fafa7698 TB |
1507 | this->ike_sa->get_other_host(this->ike_sa), |
1508 | this->config, &this->child); | |
7daf5226 | 1509 | |
3aaf7908 | 1510 | if (this->ipcomp_received != IPCOMP_NONE) |
d4aad554 | 1511 | { |
749ac175 | 1512 | if (this->config->has_option(this->config, OPT_IPCOMP)) |
3aaf7908 MW |
1513 | { |
1514 | add_ipcomp_notify(this, message, this->ipcomp_received); | |
1515 | } | |
1516 | else | |
1517 | { | |
1518 | DBG1(DBG_IKE, "received %N notify but IPComp is disabled, ignoring", | |
1519 | notify_type_names, IPCOMP_SUPPORTED); | |
1520 | } | |
d4aad554 | 1521 | } |
7daf5226 | 1522 | |
be715344 | 1523 | switch (select_and_install(this, no_dh, ike_auth)) |
c60c7694 | 1524 | { |
1fd5383e MW |
1525 | case SUCCESS: |
1526 | break; | |
1527 | case NOT_FOUND: | |
1528 | message->add_notify(message, FALSE, TS_UNACCEPTABLE, chunk_empty); | |
866ba8e0 | 1529 | handle_child_sa_failure(this, message); |
1fd5383e MW |
1530 | return SUCCESS; |
1531 | case INVALID_ARG: | |
1532 | { | |
b12c53ce | 1533 | uint16_t group = htons(this->dh_group); |
1fd5383e MW |
1534 | message->add_notify(message, FALSE, INVALID_KE_PAYLOAD, |
1535 | chunk_from_thing(group)); | |
1536 | return SUCCESS; | |
1537 | } | |
1538 | case FAILED: | |
1539 | default: | |
1540 | message->add_notify(message, FALSE, NO_PROPOSAL_CHOSEN, chunk_empty); | |
866ba8e0 | 1541 | handle_child_sa_failure(this, message); |
1fd5383e | 1542 | return SUCCESS; |
c60c7694 | 1543 | } |
7daf5226 | 1544 | |
520d58e0 MW |
1545 | if (!build_payloads(this, message)) |
1546 | { | |
1547 | message->add_notify(message, FALSE, NO_PROPOSAL_CHOSEN, chunk_empty); | |
1548 | handle_child_sa_failure(this, message); | |
1549 | return SUCCESS; | |
1550 | } | |
7daf5226 | 1551 | |
f669f453 MW |
1552 | if (!this->rekey) |
1553 | { /* invoke the child_up() hook if we are not rekeying */ | |
1554 | charon->bus->child_updown(charon->bus, this->child_sa, TRUE); | |
1555 | } | |
c60c7694 MW |
1556 | return SUCCESS; |
1557 | } | |
1558 | ||
e93f386d MW |
1559 | /** |
1560 | * Raise alerts for received notify errors | |
1561 | */ | |
1562 | static void raise_alerts(private_child_create_t *this, notify_type_t type) | |
1563 | { | |
1564 | linked_list_t *list; | |
1565 | ||
1566 | switch (type) | |
1567 | { | |
1568 | case NO_PROPOSAL_CHOSEN: | |
1569 | list = this->config->get_proposals(this->config, FALSE); | |
1570 | charon->bus->alert(charon->bus, ALERT_PROPOSAL_MISMATCH_CHILD, list); | |
1571 | list->destroy_offset(list, offsetof(proposal_t, destroy)); | |
1572 | break; | |
1573 | default: | |
1574 | break; | |
1575 | } | |
1576 | } | |
1577 | ||
e196c41b MW |
1578 | METHOD(task_t, build_i_delete, status_t, |
1579 | private_child_create_t *this, message_t *message) | |
1580 | { | |
1581 | message->set_exchange_type(message, INFORMATIONAL); | |
f91bd4b9 | 1582 | if (this->my_spi && this->proto) |
e196c41b | 1583 | { |
e196c41b | 1584 | delete_payload_t *del; |
e196c41b | 1585 | |
f91bd4b9 | 1586 | del = delete_payload_create(PLV2_DELETE, this->proto); |
ffe0889a | 1587 | del->add_spi(del, this->my_spi); |
e196c41b MW |
1588 | message->add_payload(message, (payload_t*)del); |
1589 | ||
1590 | DBG1(DBG_IKE, "sending DELETE for %N CHILD_SA with SPI %.8x", | |
f91bd4b9 | 1591 | protocol_id_names, this->proto, ntohl(this->my_spi)); |
e196c41b MW |
1592 | } |
1593 | return NEED_MORE; | |
1594 | } | |
1595 | ||
1596 | /** | |
1597 | * Change task to delete the failed CHILD_SA as initiator | |
1598 | */ | |
1599 | static status_t delete_failed_sa(private_child_create_t *this) | |
1600 | { | |
f91bd4b9 | 1601 | if (this->my_spi && this->proto) |
ffe0889a TB |
1602 | { |
1603 | this->public.task.build = _build_i_delete; | |
1604 | this->public.task.process = (void*)return_success; | |
1605 | return NEED_MORE; | |
1606 | } | |
1607 | return SUCCESS; | |
e196c41b MW |
1608 | } |
1609 | ||
cf16a29d AS |
1610 | METHOD(task_t, process_i, status_t, |
1611 | private_child_create_t *this, message_t *message) | |
c60c7694 | 1612 | { |
a44bb934 | 1613 | enumerator_t *enumerator; |
c60c7694 | 1614 | payload_t *payload; |
be715344 | 1615 | bool no_dh = TRUE, ike_auth = FALSE; |
c60c7694 MW |
1616 | |
1617 | switch (message->get_exchange_type(message)) | |
1618 | { | |
1619 | case IKE_SA_INIT: | |
1620 | return get_nonce(message, &this->other_nonce); | |
1621 | case CREATE_CHILD_SA: | |
1622 | get_nonce(message, &this->other_nonce); | |
1fd5383e | 1623 | no_dh = FALSE; |
c60c7694 | 1624 | break; |
49e8ac05 | 1625 | case IKE_AUTH: |
a44bb934 MW |
1626 | if (this->ike_sa->get_state(this->ike_sa) != IKE_ESTABLISHED) |
1627 | { /* wait until all authentication round completed */ | |
49e8ac05 MW |
1628 | return NEED_MORE; |
1629 | } | |
ed521a74 TB |
1630 | if (defer_child_sa(this) == NEED_MORE) |
1631 | { /* defer until after IKE_SA has been established */ | |
1632 | chunk_free(&this->other_nonce); | |
1633 | return NEED_MORE; | |
1634 | } | |
be715344 | 1635 | ike_auth = TRUE; |
c60c7694 MW |
1636 | default: |
1637 | break; | |
1638 | } | |
1639 | ||
ef33a4ab | 1640 | /* check for erroneous notifies */ |
a44bb934 MW |
1641 | enumerator = message->create_payload_enumerator(message); |
1642 | while (enumerator->enumerate(enumerator, &payload)) | |
c60c7694 | 1643 | { |
3ecfc83c | 1644 | if (payload->get_type(payload) == PLV2_NOTIFY) |
c60c7694 MW |
1645 | { |
1646 | notify_payload_t *notify = (notify_payload_t*)payload; | |
1647 | notify_type_t type = notify->get_notify_type(notify); | |
7daf5226 | 1648 | |
c676f2e2 | 1649 | switch (type) |
c60c7694 | 1650 | { |
c676f2e2 MW |
1651 | /* handle notify errors related to CHILD_SA only */ |
1652 | case NO_PROPOSAL_CHOSEN: | |
1653 | case SINGLE_PAIR_REQUIRED: | |
1654 | case NO_ADDITIONAL_SAS: | |
1655 | case INTERNAL_ADDRESS_FAILURE: | |
1656 | case FAILED_CP_REQUIRED: | |
1657 | case TS_UNACCEPTABLE: | |
1658 | case INVALID_SELECTORS: | |
1659 | { | |
a985db3f MW |
1660 | DBG1(DBG_IKE, "received %N notify, no CHILD_SA built", |
1661 | notify_type_names, type); | |
a44bb934 | 1662 | enumerator->destroy(enumerator); |
e93f386d | 1663 | raise_alerts(this, type); |
866ba8e0 | 1664 | handle_child_sa_failure(this, message); |
c676f2e2 MW |
1665 | /* an error in CHILD_SA creation is not critical */ |
1666 | return SUCCESS; | |
1667 | } | |
b92f11c3 TB |
1668 | case TEMPORARY_FAILURE: |
1669 | { | |
1670 | DBG1(DBG_IKE, "received %N notify, will retry later", | |
1671 | notify_type_names, type); | |
1672 | enumerator->destroy(enumerator); | |
1673 | if (!this->rekey) | |
1674 | { /* the rekey task will retry itself if necessary */ | |
1675 | schedule_delayed_retry(this); | |
1676 | } | |
1677 | return SUCCESS; | |
1678 | } | |
1fd5383e MW |
1679 | case INVALID_KE_PAYLOAD: |
1680 | { | |
1681 | chunk_t data; | |
b12c53ce | 1682 | uint16_t group = MODP_NONE; |
7daf5226 | 1683 | |
1fd5383e | 1684 | data = notify->get_notification_data(notify); |
0d1d19b9 MW |
1685 | if (data.len == sizeof(group)) |
1686 | { | |
1687 | memcpy(&group, data.ptr, data.len); | |
1688 | group = ntohs(group); | |
1689 | } | |
4f1bf89e TB |
1690 | if (this->retry) |
1691 | { | |
023d47a0 TB |
1692 | DBG1(DBG_IKE, "already retried with DH group %N, " |
1693 | "ignore requested %N", diffie_hellman_group_names, | |
4f1bf89e TB |
1694 | this->dh_group, diffie_hellman_group_names, group); |
1695 | handle_child_sa_failure(this, message); | |
1696 | /* an error in CHILD_SA creation is not critical */ | |
1697 | return SUCCESS; | |
1698 | } | |
1fd5383e MW |
1699 | DBG1(DBG_IKE, "peer didn't accept DH group %N, " |
1700 | "it requested %N", diffie_hellman_group_names, | |
0d1d19b9 | 1701 | this->dh_group, diffie_hellman_group_names, group); |
82ad53b7 | 1702 | this->retry = TRUE; |
0d1d19b9 | 1703 | this->dh_group = group; |
013857ad | 1704 | this->child_sa->set_state(this->child_sa, CHILD_RETRYING); |
1fd5383e | 1705 | this->public.task.migrate(&this->public.task, this->ike_sa); |
a44bb934 | 1706 | enumerator->destroy(enumerator); |
1fd5383e MW |
1707 | return NEED_MORE; |
1708 | } | |
c676f2e2 | 1709 | default: |
e7099aa2 MW |
1710 | { |
1711 | if (message->get_exchange_type(message) == CREATE_CHILD_SA) | |
1712 | { /* handle notifies if not handled in IKE_AUTH */ | |
1713 | if (type <= 16383) | |
1714 | { | |
1715 | DBG1(DBG_IKE, "received %N notify error", | |
1716 | notify_type_names, type); | |
1717 | enumerator->destroy(enumerator); | |
1718 | return SUCCESS; | |
1719 | } | |
1720 | DBG2(DBG_IKE, "received %N notify", | |
1721 | notify_type_names, type); | |
1722 | } | |
c676f2e2 | 1723 | break; |
e7099aa2 | 1724 | } |
c60c7694 MW |
1725 | } |
1726 | } | |
1727 | } | |
a44bb934 | 1728 | enumerator->destroy(enumerator); |
7daf5226 | 1729 | |
c60c7694 | 1730 | process_payloads(this, message); |
7daf5226 | 1731 | |
d4aad554 TB |
1732 | if (this->ipcomp == IPCOMP_NONE && this->ipcomp_received != IPCOMP_NONE) |
1733 | { | |
a985db3f MW |
1734 | DBG1(DBG_IKE, "received an IPCOMP_SUPPORTED notify without requesting" |
1735 | " one, no CHILD_SA built"); | |
866ba8e0 | 1736 | handle_child_sa_failure(this, message); |
e196c41b | 1737 | return delete_failed_sa(this); |
d4aad554 TB |
1738 | } |
1739 | else if (this->ipcomp != IPCOMP_NONE && this->ipcomp_received == IPCOMP_NONE) | |
1740 | { | |
1741 | DBG1(DBG_IKE, "peer didn't accept our proposed IPComp transforms, " | |
a985db3f | 1742 | "IPComp is disabled"); |
d4aad554 TB |
1743 | this->ipcomp = IPCOMP_NONE; |
1744 | } | |
1745 | else if (this->ipcomp != IPCOMP_NONE && this->ipcomp != this->ipcomp_received) | |
1746 | { | |
a985db3f MW |
1747 | DBG1(DBG_IKE, "received an IPCOMP_SUPPORTED notify we didn't propose, " |
1748 | "no CHILD_SA built"); | |
866ba8e0 | 1749 | handle_child_sa_failure(this, message); |
e196c41b | 1750 | return delete_failed_sa(this); |
d4aad554 | 1751 | } |
7daf5226 | 1752 | |
a777155f MW |
1753 | if (this->dh_failed) |
1754 | { | |
1755 | DBG1(DBG_IKE, "applying DH public value failed"); | |
1756 | handle_child_sa_failure(this, message); | |
1757 | return delete_failed_sa(this); | |
1758 | } | |
1759 | ||
be715344 | 1760 | if (select_and_install(this, no_dh, ike_auth) == SUCCESS) |
195ada0b | 1761 | { |
f669f453 MW |
1762 | if (!this->rekey) |
1763 | { /* invoke the child_up() hook if we are not rekeying */ | |
1764 | charon->bus->child_updown(charon->bus, this->child_sa, TRUE); | |
1765 | } | |
195ada0b | 1766 | } |
866ba8e0 MW |
1767 | else |
1768 | { | |
1769 | handle_child_sa_failure(this, message); | |
e196c41b | 1770 | return delete_failed_sa(this); |
866ba8e0 | 1771 | } |
c60c7694 MW |
1772 | return SUCCESS; |
1773 | } | |
1774 | ||
cf16a29d | 1775 | METHOD(child_create_t, use_reqid, void, |
b12c53ce | 1776 | private_child_create_t *this, uint32_t reqid) |
c60c7694 | 1777 | { |
fafa7698 | 1778 | this->child.reqid = reqid; |
c60c7694 MW |
1779 | } |
1780 | ||
85b23888 | 1781 | METHOD(child_create_t, use_marks, void, |
8ab33628 | 1782 | private_child_create_t *this, uint32_t in, uint32_t out) |
85b23888 | 1783 | { |
fafa7698 TB |
1784 | this->child.mark_in = in; |
1785 | this->child.mark_out = out; | |
85b23888 MW |
1786 | } |
1787 | ||
8ab33628 TB |
1788 | METHOD(child_create_t, use_if_ids, void, |
1789 | private_child_create_t *this, uint32_t in, uint32_t out) | |
1790 | { | |
fafa7698 TB |
1791 | this->child.if_id_in = in; |
1792 | this->child.if_id_out = out; | |
8ab33628 TB |
1793 | } |
1794 | ||
f8e53003 TB |
1795 | METHOD(child_create_t, use_dh_group, void, |
1796 | private_child_create_t *this, diffie_hellman_group_t dh_group) | |
1797 | { | |
1798 | this->dh_group = dh_group; | |
1799 | } | |
1800 | ||
cf16a29d AS |
1801 | METHOD(child_create_t, get_child, child_sa_t*, |
1802 | private_child_create_t *this) | |
195ada0b | 1803 | { |
92275b09 | 1804 | return this->child_sa; |
195ada0b MW |
1805 | } |
1806 | ||
ab24a32e MW |
1807 | METHOD(child_create_t, set_config, void, |
1808 | private_child_create_t *this, child_cfg_t *cfg) | |
1809 | { | |
1810 | DESTROY_IF(this->config); | |
1811 | this->config = cfg; | |
1812 | } | |
1813 | ||
cf16a29d AS |
1814 | METHOD(child_create_t, get_lower_nonce, chunk_t, |
1815 | private_child_create_t *this) | |
7daf5226 | 1816 | { |
eef08590 MW |
1817 | if (memcmp(this->my_nonce.ptr, this->other_nonce.ptr, |
1818 | min(this->my_nonce.len, this->other_nonce.len)) < 0) | |
1819 | { | |
1820 | return this->my_nonce; | |
1821 | } | |
1822 | else | |
1823 | { | |
1824 | return this->other_nonce; | |
1825 | } | |
1826 | } | |
1827 | ||
cf16a29d AS |
1828 | METHOD(task_t, get_type, task_type_t, |
1829 | private_child_create_t *this) | |
1830 | { | |
a09972df | 1831 | return TASK_CHILD_CREATE; |
cf16a29d AS |
1832 | } |
1833 | ||
1834 | METHOD(task_t, migrate, void, | |
1835 | private_child_create_t *this, ike_sa_t *ike_sa) | |
c60c7694 MW |
1836 | { |
1837 | chunk_free(&this->my_nonce); | |
1838 | chunk_free(&this->other_nonce); | |
6d61e334 | 1839 | if (this->tsr) |
c60c7694 MW |
1840 | { |
1841 | this->tsr->destroy_offset(this->tsr, offsetof(traffic_selector_t, destroy)); | |
1842 | } | |
6d61e334 | 1843 | if (this->tsi) |
c60c7694 MW |
1844 | { |
1845 | this->tsi->destroy_offset(this->tsi, offsetof(traffic_selector_t, destroy)); | |
1846 | } | |
1847 | DESTROY_IF(this->child_sa); | |
1848 | DESTROY_IF(this->proposal); | |
32df0d81 | 1849 | DESTROY_IF(this->nonceg); |
1fd5383e | 1850 | DESTROY_IF(this->dh); |
a777155f | 1851 | this->dh_failed = FALSE; |
c60c7694 MW |
1852 | if (this->proposals) |
1853 | { | |
1854 | this->proposals->destroy_offset(this->proposals, offsetof(proposal_t, destroy)); | |
1855 | } | |
7daf5226 | 1856 | |
c60c7694 | 1857 | this->ike_sa = ike_sa; |
12b6a68a | 1858 | this->keymat = (keymat_v2_t*)ike_sa->get_keymat(ike_sa); |
394eb35b | 1859 | this->proposal = NULL; |
c60c7694 MW |
1860 | this->proposals = NULL; |
1861 | this->tsi = NULL; | |
1862 | this->tsr = NULL; | |
1fd5383e | 1863 | this->dh = NULL; |
1729df92 | 1864 | this->nonceg = NULL; |
c60c7694 MW |
1865 | this->child_sa = NULL; |
1866 | this->mode = MODE_TUNNEL; | |
d4aad554 TB |
1867 | this->ipcomp = IPCOMP_NONE; |
1868 | this->ipcomp_received = IPCOMP_NONE; | |
1869 | this->other_cpi = 0; | |
195ada0b | 1870 | this->established = FALSE; |
fafa7698 | 1871 | this->child = (child_sa_create_t){}; |
c60c7694 MW |
1872 | } |
1873 | ||
cf16a29d AS |
1874 | METHOD(task_t, destroy, void, |
1875 | private_child_create_t *this) | |
c60c7694 MW |
1876 | { |
1877 | chunk_free(&this->my_nonce); | |
1878 | chunk_free(&this->other_nonce); | |
0a3ca290 | 1879 | if (this->tsr) |
c60c7694 MW |
1880 | { |
1881 | this->tsr->destroy_offset(this->tsr, offsetof(traffic_selector_t, destroy)); | |
1882 | } | |
0a3ca290 | 1883 | if (this->tsi) |
c60c7694 MW |
1884 | { |
1885 | this->tsi->destroy_offset(this->tsi, offsetof(traffic_selector_t, destroy)); | |
1886 | } | |
195ada0b MW |
1887 | if (!this->established) |
1888 | { | |
1889 | DESTROY_IF(this->child_sa); | |
1890 | } | |
a13c013b MW |
1891 | DESTROY_IF(this->packet_tsi); |
1892 | DESTROY_IF(this->packet_tsr); | |
c60c7694 | 1893 | DESTROY_IF(this->proposal); |
1fd5383e | 1894 | DESTROY_IF(this->dh); |
c60c7694 MW |
1895 | if (this->proposals) |
1896 | { | |
1897 | this->proposals->destroy_offset(this->proposals, offsetof(proposal_t, destroy)); | |
1898 | } | |
e0fe7651 | 1899 | DESTROY_IF(this->config); |
72376234 | 1900 | DESTROY_IF(this->nonceg); |
c60c7694 MW |
1901 | free(this); |
1902 | } | |
1903 | ||
1904 | /* | |
1905 | * Described in header. | |
1906 | */ | |
f669f453 MW |
1907 | child_create_t *child_create_create(ike_sa_t *ike_sa, |
1908 | child_cfg_t *config, bool rekey, | |
a13c013b | 1909 | traffic_selector_t *tsi, traffic_selector_t *tsr) |
c60c7694 | 1910 | { |
cf16a29d AS |
1911 | private_child_create_t *this; |
1912 | ||
1913 | INIT(this, | |
1914 | .public = { | |
1915 | .get_child = _get_child, | |
ab24a32e | 1916 | .set_config = _set_config, |
cf16a29d AS |
1917 | .get_lower_nonce = _get_lower_nonce, |
1918 | .use_reqid = _use_reqid, | |
85b23888 | 1919 | .use_marks = _use_marks, |
8ab33628 | 1920 | .use_if_ids = _use_if_ids, |
f8e53003 | 1921 | .use_dh_group = _use_dh_group, |
cf16a29d AS |
1922 | .task = { |
1923 | .get_type = _get_type, | |
1924 | .migrate = _migrate, | |
1925 | .destroy = _destroy, | |
1926 | }, | |
1927 | }, | |
1928 | .ike_sa = ike_sa, | |
1929 | .config = config, | |
1930 | .packet_tsi = tsi ? tsi->clone(tsi) : NULL, | |
1931 | .packet_tsr = tsr ? tsr->clone(tsr) : NULL, | |
1932 | .dh_group = MODP_NONE, | |
a0563846 | 1933 | .keymat = (keymat_v2_t*)ike_sa->get_keymat(ike_sa), |
cf16a29d AS |
1934 | .mode = MODE_TUNNEL, |
1935 | .tfcv3 = TRUE, | |
1936 | .ipcomp = IPCOMP_NONE, | |
1937 | .ipcomp_received = IPCOMP_NONE, | |
1938 | .rekey = rekey, | |
82ad53b7 | 1939 | .retry = FALSE, |
cf16a29d | 1940 | ); |
72376234 | 1941 | |
e0fe7651 | 1942 | if (config) |
c60c7694 | 1943 | { |
cf16a29d AS |
1944 | this->public.task.build = _build_i; |
1945 | this->public.task.process = _process_i; | |
905ab99f | 1946 | this->initiator = TRUE; |
c60c7694 MW |
1947 | } |
1948 | else | |
1949 | { | |
cf16a29d AS |
1950 | this->public.task.build = _build_r; |
1951 | this->public.task.process = _process_r; | |
c60c7694 MW |
1952 | this->initiator = FALSE; |
1953 | } | |
c60c7694 MW |
1954 | return &this->public; |
1955 | } |