a9ec179e2258c1164c4411b93304a355f7870e0b
[strongswan.git] / Source / charon / sa / states / initiator_init.c
1 /**
2 * @file initiator_init.c
3 *
4 * @brief Implementation of initiator_init_t.
5 *
6 */
7
8 /*
9 * Copyright (C) 2005 Jan Hutter, Martin Willi
10 * Hochschule fuer Technik Rapperswil
11 *
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the
14 * Free Software Foundation; either version 2 of the License, or (at your
15 * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
16 *
17 * This program is distributed in the hope that it will be useful, but
18 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
19 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
20 * for more details.
21 */
22
23 #include "initiator_init.h"
24
25
26 #include <daemon.h>
27 #include <sa/states/state.h>
28 #include <sa/states/ike_sa_init_requested.h>
29 #include <utils/allocator.h>
30 #include <queues/jobs/retransmit_request_job.h>
31 #include <transforms/diffie_hellman.h>
32 #include <encoding/payloads/sa_payload.h>
33 #include <encoding/payloads/ke_payload.h>
34 #include <encoding/payloads/nonce_payload.h>
35
36
37 typedef struct private_initiator_init_t private_initiator_init_t;
38
39 /**
40 * Private data of a initiator_init_t object..
41 *
42 */
43 struct private_initiator_init_t {
44 /**
45 * Methods of the state_t interface.
46 */
47 initiator_init_t public;
48
49 /**
50 * Assigned IKE_SA.
51 */
52 protected_ike_sa_t *ike_sa;
53
54 /**
55 * Diffie hellman object used to generate public DH value.
56 * This objet is passed to the next state of type ike_sa_init_requested_t.
57 */
58 diffie_hellman_t *diffie_hellman;
59
60 /**
61 * DH group number.
62 */
63 u_int16_t dh_group_number;
64
65 /**
66 * DH group priority used to get dh_group_number from configuration manager.
67 * This priority is passed to the next state of type ike_sa_init_requested_t.
68 */
69 u_int16_t dh_group_priority;
70
71 /**
72 * Sent nonce.
73 * This nonce is passed to the next state of type ike_sa_init_requested_t.
74 */
75 chunk_t sent_nonce;
76
77 /**
78 * Logger used to log :-)
79 *
80 * Is logger of ike_sa!
81 */
82 logger_t *logger;
83
84 /**
85 * Builds the IKE_SA_INIT request message.
86 *
87 * @param this calling object
88 * @param message the created message will be stored at this location
89 */
90 void (*build_ike_sa_init_request) (private_initiator_init_t *this, message_t **message);
91
92 /**
93 * Builds the SA payload for this state.
94 *
95 * @param this calling object
96 * @param payload The generated SA payload object of type ke_payload_t is
97 * stored at this location.
98 */
99 void (*build_sa_payload) (private_initiator_init_t *this, payload_t **payload);
100
101 /**
102 * Builds the KE payload for this state.
103 *
104 * @param this calling object
105 * @param payload The generated KE payload object of type ke_payload_t is
106 * stored at this location.
107 */
108 void (*build_ke_payload) (private_initiator_init_t *this, payload_t **payload);
109
110 /**
111 * Builds the NONCE payload for this state.
112 *
113 * @param this calling object
114 * @param payload The generated NONCE payload object of type ke_payload_t is
115 * stored at this location.
116 */
117 void (*build_nonce_payload) (private_initiator_init_t *this, payload_t **payload);
118
119 /**
120 * Destroy function called internally of this class after state change to state
121 * IKE_SA_INIT_REQUESTED succeeded.
122 *
123 * This destroy function does not destroy objects which were passed to the new state.
124 *
125 * @param this calling object
126 */
127 void (*destroy_after_state_change) (private_initiator_init_t *this);
128 };
129
130 /**
131 * Implementation of initiator_init_t.initiate_connection.
132 */
133 static status_t initiate_connection (private_initiator_init_t *this, char *name)
134 {
135 init_config_t *init_config;
136 sa_config_t *sa_config;
137 status_t status;
138
139
140 this->logger->log(this->logger, CONTROL, "Initializing connection %s",name);
141
142 status = charon->configuration_manager->get_init_config_for_name(charon->configuration_manager,name,&init_config);
143 if (status != SUCCESS)
144 {
145 this->logger->log(this->logger, ERROR | MORE, "Could not retrieve INIT configuration informations for %s",name);
146 return DELETE_ME;
147 }
148
149 this->ike_sa->set_init_config(this->ike_sa,init_config);
150
151 status = charon->configuration_manager->get_sa_config_for_name(charon->configuration_manager,name,&sa_config);
152
153 if (status != SUCCESS)
154 {
155 this->logger->log(this->logger, ERROR | MORE, "Could not retrieve SA configuration informations for %s",name);
156 return DELETE_ME;
157 }
158
159 this->ike_sa->set_sa_config(this->ike_sa,sa_config);
160
161 /* host informations are read from configuration */
162 this->ike_sa->set_other_host(this->ike_sa,init_config->get_other_host_clone(init_config));
163 this->ike_sa->set_my_host(this->ike_sa,init_config->get_my_host_clone(init_config));
164
165 this->dh_group_number = init_config->get_dh_group_number(init_config,this->dh_group_priority);
166 if (this->dh_group_number == MODP_UNDEFINED)
167 {
168 this->logger->log(this->logger, ERROR | MORE, "Diffie hellman group could not be retrieved with priority %d", this->dh_group_priority);
169 return DELETE_ME;
170 }
171
172 /* next step is done in retry_initiate_connection */
173 return this->public.retry_initiate_connection(&(this->public),this->dh_group_priority);
174 }
175
176 /**
177 * Implementation of initiator_init_t.retry_initiate_connection.
178 */
179 status_t retry_initiate_connection (private_initiator_init_t *this, int dh_group_priority)
180 {
181 ike_sa_init_requested_t *next_state;
182 chunk_t ike_sa_init_request_data;
183 init_config_t *init_config;
184 randomizer_t *randomizer;
185 ike_sa_id_t *ike_sa_id;
186 message_t *message;
187 status_t status;
188
189
190 this->dh_group_priority = dh_group_priority;
191
192 init_config = this->ike_sa->get_init_config(this->ike_sa);
193
194 ike_sa_id = this->ike_sa->public.get_id(&(this->ike_sa->public));
195 ike_sa_id->set_responder_spi(ike_sa_id,0);
196
197 this->dh_group_number = init_config->get_dh_group_number(init_config,dh_group_priority);
198 if (this->dh_group_number == MODP_UNDEFINED)
199 {
200 this->logger->log(this->logger, ERROR | MORE, "Diffie hellman group could not be retrieved with priority %d", dh_group_priority);
201 return DELETE_ME;
202 }
203
204 this->diffie_hellman = diffie_hellman_create(this->dh_group_number);
205
206 this->logger->log(this->logger, CONTROL|MOST, "Get pseudo random bytes for nonce");
207 randomizer = this->ike_sa->get_randomizer(this->ike_sa);
208
209 allocator_free_chunk(&(this->sent_nonce));
210
211 randomizer->allocate_pseudo_random_bytes(randomizer, NONCE_SIZE, &(this->sent_nonce));
212
213 this->logger->log(this->logger, RAW|MOST, "Nonce",&(this->sent_nonce));
214
215 this->build_ike_sa_init_request (this,&message);
216
217 /* message can now be sent (must not be destroyed) */
218 status = this->ike_sa->send_request(this->ike_sa, message);
219 if (status != SUCCESS)
220 {
221 this->logger->log(this->logger, ERROR, "Could not send request message");
222 message->destroy(message);
223 return DELETE_ME;
224 }
225
226 message = this->ike_sa->get_last_requested_message(this->ike_sa);
227
228 ike_sa_init_request_data = message->get_packet_data(message);
229
230 /* state can now be changed */
231 this->logger->log(this->logger, CONTROL|MOST, "Create next state object");
232 next_state = ike_sa_init_requested_create(this->ike_sa, this->dh_group_priority, this->diffie_hellman, this->sent_nonce,ike_sa_init_request_data);
233
234 /* state can now be changed */
235 this->ike_sa->set_new_state(this->ike_sa,(state_t *) next_state);
236
237 /* state has NOW changed :-) */
238 this->logger->log(this->logger, CONTROL|MORE, "Changed state of IKE_SA from %s to %s", mapping_find(ike_sa_state_m,INITIATOR_INIT),mapping_find(ike_sa_state_m,IKE_SA_INIT_REQUESTED) );
239
240 this->logger->log(this->logger, CONTROL|MOST, "Destroy old sate object");
241 this->destroy_after_state_change(this);
242 return SUCCESS;
243 }
244
245 /**
246 * implements private_initiator_init_t.build_ike_sa_init_request
247 */
248 static void build_ike_sa_init_request (private_initiator_init_t *this, message_t **request)
249 {
250 payload_t *payload;
251 message_t *message;
252
253 /* going to build message */
254 this->logger->log(this->logger, CONTROL|MOST, "Going to build message");
255 this->ike_sa->build_message(this->ike_sa, IKE_SA_INIT, TRUE, &message);
256
257 /* build SA payload */
258 this->build_sa_payload(this, &payload);
259 this->logger->log(this->logger, CONTROL|MOST, "add SA payload to message");
260 message->add_payload(message, payload);
261
262 /* build KE payload */
263 this->build_ke_payload(this, &payload);
264 this->logger->log(this->logger, CONTROL|MOST, "add KE payload to message");
265 message->add_payload(message, payload);
266
267 /* build Nonce payload */
268 this->build_nonce_payload(this, &payload);
269 this->logger->log(this->logger, CONTROL|MOST, "add nonce payload to message");
270 message->add_payload(message, payload);
271
272 *request = message;
273 }
274
275 /**
276 * implements private_initiator_init_t.build_sa_payload
277 */
278 static void build_sa_payload(private_initiator_init_t *this, payload_t **payload)
279 {
280 sa_payload_t* sa_payload;
281 size_t proposal_count;
282 ike_proposal_t *proposals;
283 init_config_t *init_config;
284
285 this->logger->log(this->logger, CONTROL|MORE, "building sa payload");
286
287 init_config = this->ike_sa->get_init_config(this->ike_sa);
288
289 proposal_count = init_config->get_proposals(init_config,&proposals);
290
291 sa_payload = sa_payload_create_from_ike_proposals(proposals,proposal_count);
292
293 allocator_free(proposals);
294 *payload = (payload_t *) sa_payload;
295 }
296
297 /**
298 * implements private_initiator_init_t.build_ke_payload
299 */
300 static void build_ke_payload(private_initiator_init_t *this, payload_t **payload)
301 {
302 ke_payload_t *ke_payload;
303 chunk_t key_data;
304
305 this->logger->log(this->logger, CONTROL|MORE, "building ke payload");
306
307 this->diffie_hellman->get_my_public_value(this->diffie_hellman,&key_data);
308
309 ke_payload = ke_payload_create();
310 ke_payload->set_dh_group_number(ke_payload, this->dh_group_number);
311 ke_payload->set_key_exchange_data(ke_payload, key_data);
312
313 allocator_free_chunk(&key_data);
314 *payload = (payload_t *) ke_payload;
315 }
316
317 /**
318 * implements private_initiator_init_t.build_nonce_payload
319 */
320 static void build_nonce_payload(private_initiator_init_t *this, payload_t **payload)
321 {
322 nonce_payload_t *nonce_payload;
323
324 this->logger->log(this->logger, CONTROL|MORE, "building nonce payload");
325
326 nonce_payload = nonce_payload_create();
327
328 nonce_payload->set_nonce(nonce_payload, this->sent_nonce);
329
330 *payload = (payload_t *) nonce_payload;
331 }
332
333 /**
334 * Implements state_t.get_state
335 */
336 static status_t process_message(private_initiator_init_t *this, message_t *message)
337 {
338 this->logger->log(this->logger, ERROR|MORE, "In state INITIATOR_INIT no message is processed");
339 return FAILED;
340 }
341
342 /**
343 * Implements state_t.get_state
344 */
345 static ike_sa_state_t get_state(private_initiator_init_t *this)
346 {
347 return INITIATOR_INIT;
348 }
349
350 /**
351 * Implements state_t.get_state
352 */
353 static void destroy(private_initiator_init_t *this)
354 {
355 this->logger->log(this->logger, CONTROL | MORE, "Going to destroy initiator_init_t state object");
356
357 /* destroy stored proposal */
358 this->logger->log(this->logger, CONTROL | MOST, "Destroy stored proposals");
359
360 /* destroy diffie hellman object */
361 if (this->diffie_hellman != NULL)
362 {
363 this->logger->log(this->logger, CONTROL | MOST, "Destroy diffie_hellman_t object");
364 this->diffie_hellman->destroy(this->diffie_hellman);
365 }
366 if (this->sent_nonce.ptr != NULL)
367 {
368 this->logger->log(this->logger, CONTROL | MOST, "Free memory of sent nonce");
369 allocator_free(this->sent_nonce.ptr);
370 }
371 allocator_free(this);
372 }
373
374 /**
375 * Implements private_initiator_init_t.destroy_after_state_change
376 */
377 static void destroy_after_state_change (private_initiator_init_t *this)
378 {
379 this->logger->log(this->logger, CONTROL | MORE, "Going to destroy initiator_init_t state object");
380
381 /* destroy stored proposal */
382 this->logger->log(this->logger, CONTROL | MOST, "Destroy stored proposals");
383 allocator_free(this);
384 }
385
386 /*
387 * Described in header.
388 */
389 initiator_init_t *initiator_init_create(protected_ike_sa_t *ike_sa)
390 {
391 private_initiator_init_t *this = allocator_alloc_thing(private_initiator_init_t);
392
393 /* interface functions */
394 this->public.state_interface.process_message = (status_t (*) (state_t *,message_t *)) process_message;
395 this->public.state_interface.get_state = (ike_sa_state_t (*) (state_t *)) get_state;
396 this->public.state_interface.destroy = (void (*) (state_t *)) destroy;
397
398 /* public functions */
399 this->public.initiate_connection = (status_t (*)(initiator_init_t *, char *)) initiate_connection;
400 this->public.retry_initiate_connection = (status_t (*)(initiator_init_t *, int )) retry_initiate_connection;
401
402 /* private functions */
403 this->destroy_after_state_change = destroy_after_state_change;
404 this->build_ike_sa_init_request = build_ike_sa_init_request;
405 this->build_nonce_payload = build_nonce_payload;
406 this->build_sa_payload = build_sa_payload;
407 this->build_ke_payload = build_ke_payload;
408
409 /* private data */
410 this->ike_sa = ike_sa;
411 this->dh_group_priority = 1;
412 this->logger = this->ike_sa->get_logger(this->ike_sa);
413 this->sent_nonce = CHUNK_INITIALIZER;
414
415 return &(this->public);
416 }