reworked parsing and matching of subjectAltNames
[strongswan.git] / src / 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 <queues/jobs/retransmit_request_job.h>
30 #include <crypto/diffie_hellman.h>
31 #include <encoding/payloads/sa_payload.h>
32 #include <encoding/payloads/ke_payload.h>
33 #include <encoding/payloads/nonce_payload.h>
34
35
36 typedef struct private_initiator_init_t private_initiator_init_t;
37
38 /**
39 * Private data of a initiator_init_t object..
40 *
41 */
42 struct private_initiator_init_t {
43 /**
44 * Methods of the state_t interface.
45 */
46 initiator_init_t public;
47
48 /**
49 * Assigned IKE_SA.
50 */
51 protected_ike_sa_t *ike_sa;
52
53 /**
54 * Diffie hellman object used to generate public DH value.
55 * This objet is passed to the next state of type IKE_SA_INIT_REQUESTED.
56 */
57 diffie_hellman_t *diffie_hellman;
58
59 /**
60 * Sent nonce.
61 * This nonce is passed to the next state of type IKE_SA_INIT_REQUESTED.
62 */
63 chunk_t sent_nonce;
64
65 /**
66 * Assigned logger.
67 *
68 * Is logger of ike_sa!
69 */
70 logger_t *logger;
71
72 /**
73 * Builds the SA payload for this state.
74 *
75 * @param this calling object
76 * @param request message_t object to add the SA payload
77 */
78 void (*build_sa_payload) (private_initiator_init_t *this, message_t *request);
79
80 /**
81 * Builds the KE payload for this state.
82 *
83 * @param this calling object
84 * @param request message_t object to add the KE payload
85 */
86 void (*build_ke_payload) (private_initiator_init_t *this, message_t *request);
87
88 /**
89 * Builds the NONCE payload for this state.
90 *
91 * @param this calling object
92 * @param request message_t object to add the NONCE payload
93 */
94 status_t (*build_nonce_payload) (private_initiator_init_t *this,message_t *request);
95
96 /**
97 * Destroy function called internally of this class after state change to state
98 * IKE_SA_INIT_REQUESTED succeeded.
99 *
100 * This destroy function does not destroy objects which were passed to the new state.
101 *
102 * @param this calling object
103 */
104 void (*destroy_after_state_change) (private_initiator_init_t *this);
105 };
106
107 /**
108 * Implementation of initiator_init_t.initiate_connection.
109 */
110 static status_t initiate_connection (private_initiator_init_t *this, connection_t *connection)
111 {
112 policy_t *policy;
113 diffie_hellman_group_t dh_group;
114 host_t *my_host, *other_host;
115 identification_t *my_id, *other_id;
116
117 my_host = connection->get_my_host(connection);
118 other_host = connection->get_other_host(connection);
119 my_id = connection->get_my_id(connection);
120 other_id = connection->get_other_id(connection);
121
122 this->logger->log(this->logger, CONTROL, "Initiating connection between %s (%s) - %s (%s)",
123 my_id->get_string(my_id), my_host->get_address(my_host),
124 other_id->get_string(other_id), other_host->get_address(other_host));
125
126 this->ike_sa->set_connection(this->ike_sa, connection);
127
128 /* get policy */
129 policy = charon->policies->get_policy(charon->policies, my_id, other_id);
130 if (policy == NULL)
131 {
132 this->logger->log(this->logger, ERROR | LEVEL1, "Could not get a policy for '%s - %s', aborting",
133 my_id->get_string(my_id), other_id->get_string(other_id));
134 return DESTROY_ME;
135 }
136 this->ike_sa->set_policy(this->ike_sa,policy);
137
138 /* we must guess now a DH group. For that we choose our most preferred group */
139 dh_group = connection->get_dh_group(connection);
140
141 /* next step is done in retry_initiate_connection */
142 return this->public.retry_initiate_connection(&this->public, dh_group);
143 }
144
145 /**
146 * Implementation of initiator_init_t.retry_initiate_connection.
147 */
148 status_t retry_initiate_connection (private_initiator_init_t *this, diffie_hellman_group_t dh_group)
149 {
150 ike_sa_init_requested_t *next_state;
151 chunk_t ike_sa_init_request_data;
152 connection_t *connection;
153 ike_sa_id_t *ike_sa_id;
154 message_t *message;
155 status_t status;
156
157 if (dh_group == MODP_UNDEFINED)
158 {
159 this->logger->log(this->logger, AUDIT, "No DH group acceptable for initialization, Aborting");
160 return DESTROY_ME;
161 }
162
163 connection = this->ike_sa->get_connection(this->ike_sa);
164 this->diffie_hellman = diffie_hellman_create(dh_group);
165 ike_sa_id = this->ike_sa->public.get_id(&(this->ike_sa->public));
166 ike_sa_id->set_responder_spi(ike_sa_id,0);
167
168 /* going to build message */
169 this->logger->log(this->logger, CONTROL|LEVEL2, "Going to build message");
170 this->ike_sa->build_message(this->ike_sa, IKE_SA_INIT, TRUE, &message);
171
172 /* build SA payload */
173 this->build_sa_payload(this, message);
174
175 /* build KE payload */
176 this->build_ke_payload(this, message);
177
178 /* build Nonce payload */
179 status = this->build_nonce_payload(this, message);
180 if (status != SUCCESS)
181 {
182 this->logger->log(this->logger, ERROR, "Building nonce payload failed. Aborting");
183 message->destroy(message);
184 return DESTROY_ME;
185 }
186
187 /* message can now be sent (must not be destroyed) */
188 status = this->ike_sa->send_request(this->ike_sa, message);
189 if (status != SUCCESS)
190 {
191 this->logger->log(this->logger, AUDIT, "Unable to initiate connection, could not send message. Aborting");
192 message->destroy(message);
193 return DESTROY_ME;
194 }
195
196 message = this->ike_sa->get_last_requested_message(this->ike_sa);
197
198 ike_sa_init_request_data = message->get_packet_data(message);
199
200 /* state can now be changed */
201 this->logger->log(this->logger, CONTROL|LEVEL2, "Create next state object");
202 next_state = ike_sa_init_requested_create(this->ike_sa, this->diffie_hellman, this->sent_nonce,ike_sa_init_request_data);
203 this->ike_sa->set_new_state(this->ike_sa,(state_t *) next_state);
204
205 this->logger->log(this->logger, CONTROL|LEVEL2, "Destroy old sate object");
206 this->destroy_after_state_change(this);
207 return SUCCESS;
208 }
209
210 /**
211 * Implementation of private_initiator_init_t.build_sa_payload.
212 */
213 static void build_sa_payload(private_initiator_init_t *this, message_t *request)
214 {
215 sa_payload_t* sa_payload;
216 linked_list_t *proposal_list;
217 connection_t *connection;
218
219 this->logger->log(this->logger, CONTROL|LEVEL1, "Building SA payload");
220
221 connection = this->ike_sa->get_connection(this->ike_sa);
222
223 proposal_list = connection->get_proposals(connection);
224
225 sa_payload = sa_payload_create_from_proposal_list(proposal_list);
226
227 this->logger->log(this->logger, CONTROL|LEVEL2, "Add SA payload to message");
228 request->add_payload(request, (payload_t *) sa_payload);
229 }
230
231 /**
232 * Implementation of private_initiator_init_t.build_ke_payload.
233 */
234 static void build_ke_payload(private_initiator_init_t *this, message_t *request)
235 {
236 ke_payload_t *ke_payload;
237 chunk_t key_data;
238 diffie_hellman_group_t dh_group;
239
240 this->logger->log(this->logger, CONTROL|LEVEL1, "Building KE payload");
241
242 this->diffie_hellman->get_my_public_value(this->diffie_hellman,&key_data);
243 dh_group = this->diffie_hellman->get_dh_group(this->diffie_hellman);
244
245 ke_payload = ke_payload_create();
246 ke_payload->set_dh_group_number(ke_payload, dh_group);
247 ke_payload->set_key_exchange_data(ke_payload, key_data);
248
249 chunk_free(&key_data);
250
251 this->logger->log(this->logger, CONTROL|LEVEL2, "Add KE payload to message");
252 request->add_payload(request, (payload_t *) ke_payload);
253 }
254
255 /**
256 * Implementation of private_initiator_init_t.build_nonce_payload.
257 */
258 static status_t build_nonce_payload(private_initiator_init_t *this, message_t *request)
259 {
260 nonce_payload_t *nonce_payload;
261 randomizer_t *randomizer;
262 status_t status;
263
264 this->logger->log(this->logger, CONTROL|LEVEL1, "Building NONCE payload");
265
266 this->logger->log(this->logger, CONTROL|LEVEL2, "Get pseudo random bytes for NONCE");
267 randomizer = this->ike_sa->get_randomizer(this->ike_sa);
268
269 status = randomizer->allocate_pseudo_random_bytes(randomizer, NONCE_SIZE, &(this->sent_nonce));
270 if (status != SUCCESS)
271 {
272 return status;
273 }
274
275 this->logger->log(this->logger, RAW|LEVEL2, "Initiator NONCE",&(this->sent_nonce));
276
277 nonce_payload = nonce_payload_create();
278
279 nonce_payload->set_nonce(nonce_payload, this->sent_nonce);
280
281 this->logger->log(this->logger, CONTROL|LEVEL2, "Add NONCE payload to message");
282 request->add_payload(request, (payload_t *) nonce_payload);
283 return SUCCESS;
284 }
285
286 /**
287 * Implementation of state_t.process_message.
288 */
289 static status_t process_message(private_initiator_init_t *this, message_t *message)
290 {
291 this->logger->log(this->logger, ERROR, "In state INITIATOR_INIT, no message is processed");
292 return FAILED;
293 }
294
295 /**
296 * Implementation of state_t.get_state.
297 */
298 static ike_sa_state_t get_state(private_initiator_init_t *this)
299 {
300 return INITIATOR_INIT;
301 }
302
303 /**
304 * Implementation of state_t.destroy.
305 */
306 static void destroy(private_initiator_init_t *this)
307 {
308 this->logger->log(this->logger, CONTROL | LEVEL3, "Going to destroy initiator_init_t state object");
309
310 /* destroy diffie hellman object */
311 if (this->diffie_hellman != NULL)
312 {
313 this->diffie_hellman->destroy(this->diffie_hellman);
314 }
315 if (this->sent_nonce.ptr != NULL)
316 {
317 free(this->sent_nonce.ptr);
318 }
319 free(this);
320 }
321
322 /**
323 * Implementation of private_initiator_init_t.destroy_after_state_change
324 */
325 static void destroy_after_state_change (private_initiator_init_t *this)
326 {
327 this->logger->log(this->logger, CONTROL | LEVEL3, "Going to destroy initiator_init_t state object");
328 free(this);
329 }
330
331 /*
332 * Described in header.
333 */
334 initiator_init_t *initiator_init_create(protected_ike_sa_t *ike_sa)
335 {
336 private_initiator_init_t *this = malloc_thing(private_initiator_init_t);
337
338 /* interface functions */
339 this->public.state_interface.process_message = (status_t (*) (state_t *,message_t *)) process_message;
340 this->public.state_interface.get_state = (ike_sa_state_t (*) (state_t *)) get_state;
341 this->public.state_interface.destroy = (void (*) (state_t *)) destroy;
342
343 /* public functions */
344 this->public.initiate_connection = (status_t (*)(initiator_init_t *, connection_t*)) initiate_connection;
345 this->public.retry_initiate_connection = (status_t (*)(initiator_init_t *, int )) retry_initiate_connection;
346
347 /* private functions */
348 this->destroy_after_state_change = destroy_after_state_change;
349 this->build_nonce_payload = build_nonce_payload;
350 this->build_sa_payload = build_sa_payload;
351 this->build_ke_payload = build_ke_payload;
352
353 /* private data */
354 this->ike_sa = ike_sa;
355 this->logger = logger_manager->get_logger(logger_manager, IKE_SA);
356 this->sent_nonce = CHUNK_INITIALIZER;
357 this->diffie_hellman = NULL;
358
359 return &(this->public);
360 }