Source/charon/sa/states/ike_sa_init_responded.c

   1 /**
   2  * @file ike_sa_init_responded.c
   3  *
   4  * @brief State of a IKE_SA after responding to an IKE_SA_INIT request
   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 "ike_sa_init_responded.h"
  24
  25 #include <daemon.h>
  26 #include <utils/allocator.h>
  27 #include <sa/authenticator.h>
  28 #include <sa/child_sa.h>
  29 #include <encoding/payloads/ts_payload.h>
  30 #include <encoding/payloads/sa_payload.h>
  31 #include <encoding/payloads/id_payload.h>
  32 #include <encoding/payloads/auth_payload.h>
  33 #include <encoding/payloads/notify_payload.h>
  34 #include <transforms/signers/signer.h>
  35 #include <transforms/crypters/crypter.h>
  36 #include <sa/states/ike_sa_established.h>
  37
  38
  39 typedef struct private_ike_sa_init_responded_t private_ike_sa_init_responded_t;
  40
  41 /**
  42  * Private data of a ike_sa_init_responded_t object.
  43  *
  44  */
  45 struct private_ike_sa_init_responded_t {
  46         /**
  47          * Public interface of ike_sa_init_responded_t.
  48          */
  49         ike_sa_init_responded_t public;
  50
  51         /**
  52          * Assigned IKE_SA.
  53          */
  54         protected_ike_sa_t *ike_sa;
  55
  56         /**
  57          * Received nonce.
  58          */
  59         chunk_t received_nonce;
  60
  61         /**
  62          * Sent nonce.
  63          */
  64         chunk_t sent_nonce;
  65
  66         /**
  67          * Binary representation of the IKE_SA_INIT response.
  68          */
  69         chunk_t ike_sa_init_response_data;
  70
  71         /**
  72          * Binary representation of the IKE_SA_INIT request.
  73          */
  74         chunk_t ike_sa_init_request_data;
  75
  76         /**
  77          * SA config to use.
  78          */
  79         sa_config_t *sa_config;
  80
  81         /**
  82          * Proposal selected for CHILD_SA
  83          */
  84         proposal_t *proposal;
  85
  86         /**
  87          * Traffic selectors applicable at our site
  88          */
  89         linked_list_t *my_ts;
  90
  91         /**
  92          * Traffic selectors applicable at remote site
  93          */
  94         linked_list_t *other_ts;
  95
  96         /**
  97          * Assigned logger.
  98          *
  99          * Is logger of ike_sa!
 100          */
 101         logger_t *logger;
 102
 103         /**
 104          * Process received IDi and IDr payload and build IDr payload for IKE_AUTH response.
 105          *
 106          * @param this                  calling object
 107          * @param request_idi   ID payload representing initiator
 108          * @param request_idr   ID payload representing responder (May be zero)
 109          * @param response              The created IDr payload is added to this message_t object
 110          * @param response_idr  The created IDr payload is also written to this location
 111          */
 112         status_t (*build_idr_payload) (private_ike_sa_init_responded_t *this,
 113                                                                         id_payload_t *request_idi,
 114                                                                         id_payload_t *request_idr,
 115                                                                         message_t *response,
 116                                                                         id_payload_t **response_idr);
 117
 118         /**
 119          * Process received SA payload and build SA payload for IKE_AUTH response.
 120          *
 121          * @param this                  calling object
 122          * @param request               SA payload received in IKE_AUTH request
 123          * @param response              The created SA payload is added to this message_t object
 124          */
 125         status_t (*build_sa_payload) (private_ike_sa_init_responded_t *this, sa_payload_t *request, message_t *response);
 126
 127         /**
 128          * Process received AUTH payload and build AUTH payload for IKE_AUTH response.
 129          *
 130          * @param this                          calling object
 131          * @param request                       AUTH payload received in IKE_AUTH request
 132          * @param other_id_payload      other ID payload needed to verify AUTH data
 133          * @param my_id_payload         my ID payload needed to compute AUTH data
 134          * @param response                      The created AUTH payload is added to this message_t object
 135          */
 136         status_t (*build_auth_payload) (private_ike_sa_init_responded_t *this, auth_payload_t *request,id_payload_t *other_id_payload,id_payload_t *my_id_payload, message_t* response);
 137
 138         /**
 139          * Process received TS payload and build TS payload for IKE_AUTH response.
 140          *
 141          * @param this                  calling object
 142          * @param is_initiator  type of TS payload. TRUE for TSi, FALSE for TSr
 143          * @param request               TS payload received in IKE_AUTH request
 144          * @param response              the created TS payload is added to this message_t object
 145          */
 146         status_t (*build_ts_payload) (private_ike_sa_init_responded_t *this, bool ts_initiator, ts_payload_t *request, message_t *response);
 147
 148         /**
 149          * Sends a IKE_AUTH reply containing a notify payload.
 150          *
 151          * @param this          calling object
 152          * @param notify_payload payload to process
 153          * @return
 154          *                                      - DELETE_ME if IKE_SA should be deleted
 155          *                                      - SUCCSS if processed successfull
 156          */
 157         status_t (*process_notify_payload) (private_ike_sa_init_responded_t *this, notify_payload_t* notify_payload);
 158 };
 159
 160 /**
 161  * Implements state_t.get_state
 162  */
 163 static status_t process_message(private_ike_sa_init_responded_t *this, message_t *request)
 164 {
 165         id_payload_t *idi_request = NULL, *idr_request = NULL,*idr_response;
 166         ts_payload_t *tsi_request = NULL, *tsr_request = NULL;
 167         auth_payload_t *auth_request = NULL;
 168         sa_payload_t *sa_request = NULL;
 169         iterator_t *payloads;
 170         message_t *response;
 171         crypter_t *crypter;
 172         signer_t *signer;
 173         status_t status;
 174         host_t *my_host, *other_host;
 175         chunk_t seed;
 176         prf_plus_t *prf_plus;
 177         child_sa_t *child_sa;
 178
 179
 180         if (request->get_exchange_type(request) != IKE_AUTH)
 181         {
 182                 this->logger->log(this->logger, ERROR | LEVEL1, "Message of type %s not supported in state ike_sa_init_responded",
 183                                                         mapping_find(exchange_type_m,request->get_exchange_type(request)));
 184                 return FAILED;
 185         }
 186
 187         if (!request->get_request(request))
 188         {
 189                 this->logger->log(this->logger, ERROR | LEVEL1, "IKE_AUTH responses not allowed state ike_sa_init_responded");
 190                 return FAILED;
 191         }
 192
 193         /* get signer for verification and crypter for decryption */
 194         signer = this->ike_sa->get_signer_initiator(this->ike_sa);
 195         crypter = this->ike_sa->get_crypter_initiator(this->ike_sa);
 196
 197         status = request->parse_body(request, crypter, signer);
 198         if (status != SUCCESS)
 199         {
 200                 if (status == NOT_SUPPORTED)
 201                 {
 202                         this->logger->log(this->logger, ERROR | LEVEL1, "IKE_AUTH request contains unsupported payload with critical flag set."
 203                                                                                                                         "Deleting IKE_SA");
 204                         this->ike_sa->send_notify(this->ike_sa, IKE_AUTH, UNSUPPORTED_CRITICAL_PAYLOAD, CHUNK_INITIALIZER);
 205                         return DELETE_ME;
 206                 }
 207                 else
 208                 {
 209                         this->logger->log(this->logger, AUDIT, "IKE_AUTH request decryption faild. Ignoring message");
 210                 }
 211                 return status;
 212         }
 213
 214         /* iterate over incoming payloads. Message is verified, we can be sure there are the required payloads */
 215         payloads = request->get_payload_iterator(request);
 216         while (payloads->has_next(payloads))
 217         {
 218                 payload_t *payload;
 219                 payloads->current(payloads, (void**)&payload);
 220
 221                 switch (payload->get_type(payload))
 222                 {
 223                         case ID_INITIATOR:
 224                         {
 225                                 idi_request = (id_payload_t*)payload;
 226                                 break;
 227                         }
 228                         case AUTHENTICATION:
 229                         {
 230                                 auth_request = (auth_payload_t*)payload;
 231                                 break;
 232                         }
 233                         case ID_RESPONDER:
 234                         {
 235                                 idr_request = (id_payload_t*)payload;
 236                                 break;
 237                         }
 238                         case SECURITY_ASSOCIATION:
 239                         {
 240                                 sa_request = (sa_payload_t*)payload;
 241                                 break;
 242                         }
 243
 244                         case TRAFFIC_SELECTOR_INITIATOR:
 245                         {
 246                                 tsi_request = (ts_payload_t*)payload;
 247                                 break;
 248                         }
 249                         case TRAFFIC_SELECTOR_RESPONDER:
 250                         {
 251                                 tsr_request = (ts_payload_t*)payload;
 252                                 break;
 253                         }
 254                         case NOTIFY:
 255                         {
 256                                 notify_payload_t *notify_payload = (notify_payload_t *) payload;
 257                                 status = this->process_notify_payload(this, notify_payload);
 258                                 if (status != SUCCESS)
 259                                 {
 260                                         payloads->destroy(payloads);
 261                                         return status;
 262                                 }
 263                         }
 264                         case CERTIFICATE:
 265                         {
 266                                 /* TODO handle cert payloads */
 267                         }
 268                         case CERTIFICATE_REQUEST:
 269                         {
 270                                 /* TODO handle certrequest payloads */
 271                         }
 272                         default:
 273                         {
 274                                 this->logger->log(this->logger, ERROR|LEVEL1, "Ignoring payload %s (%d)",
 275                                                                         mapping_find(payload_type_m, payload->get_type(payload)), payload->get_type(payload));
 276                                 break;
 277                         }
 278                 }
 279         }
 280         /* iterator can be destroyed */
 281         payloads->destroy(payloads);
 282
 283         /* check if we have all payloads */
 284         if (!(idi_request && sa_request && auth_request && tsi_request && tsr_request))
 285         {
 286                 this->logger->log(this->logger, AUDIT, "IKE_AUTH reply did not contain all required payloads. Deleting IKE_SA");
 287                 return DELETE_ME;
 288         }
 289
 290         /* build response */
 291         this->ike_sa->build_message(this->ike_sa, IKE_AUTH, FALSE, &response);
 292
 293         /* add payloads to it */
 294         status = this->build_idr_payload(this, idi_request, idr_request, response,&idr_response);
 295         if (status != SUCCESS)
 296         {
 297                 response->destroy(response);
 298                 return status;
 299         }
 300         status = this->build_sa_payload(this, sa_request, response);
 301         if (status != SUCCESS)
 302         {
 303                 response->destroy(response);
 304                 return status;
 305         }
 306         status = this->build_auth_payload(this, auth_request,idi_request, idr_response,response);
 307         if (status != SUCCESS)
 308         {
 309                 response->destroy(response);
 310                 return status;
 311         }
 312         status = this->build_ts_payload(this, TRUE, tsi_request, response);
 313         if (status != SUCCESS)
 314         {
 315                 response->destroy(response);
 316                 return status;
 317         }
 318         status = this->build_ts_payload(this, FALSE, tsr_request, response);
 319         if (status != SUCCESS)
 320         {
 321                 response->destroy(response);
 322                 return status;
 323         }
 324
 325         status = this->ike_sa->send_response(this->ike_sa, response);
 326         /* message can now be sent (must not be destroyed) */
 327         if (status != SUCCESS)
 328         {
 329                 this->logger->log(this->logger, AUDIT, "Unable to send IKE_AUTH reply. Deleting IKE_SA");
 330                 response->destroy(response);
 331                 return DELETE_ME;
 332         }
 333
 334         /* install child SAs for AH and esp */
 335         if (!this->proposal)
 336         {
 337                 this->logger->log(this->logger, CONTROL, "Proposal negotiation failed, no CHILD_SA built");
 338         }
 339         else if (this->my_ts->get_count(this->my_ts) == 0 || this->other_ts->get_count(this->other_ts) == 0)
 340         {
 341                 this->logger->log(this->logger, CONTROL, "Traffic selector negotiation failed, no CHILD_SA built");
 342         }
 343         else
 344         {
 345                 seed = allocator_alloc_as_chunk(this->received_nonce.len + this->sent_nonce.len);
 346                 memcpy(seed.ptr, this->received_nonce.ptr, this->received_nonce.len);
 347                 memcpy(seed.ptr + this->received_nonce.len, this->sent_nonce.ptr, this->sent_nonce.len);
 348                 prf_plus = prf_plus_create(this->ike_sa->get_child_prf(this->ike_sa), seed);
 349                 allocator_free_chunk(&seed);
 350
 351                 child_sa = child_sa_create(this->ike_sa->get_my_host(this->ike_sa),
 352                                                                 this->ike_sa->get_other_host(this->ike_sa));
 353
 354                 status = child_sa->add(child_sa, this->proposal, prf_plus);
 355                 prf_plus->destroy(prf_plus);
 356                 if (status != SUCCESS)
 357                 {
 358                         this->logger->log(this->logger, AUDIT, "Could not install CHILD_SA! Deleting IKE_SA");
 359                         return DELETE_ME;
 360                 }
 361                 status = child_sa->add_policy(child_sa, this->my_ts, this->other_ts);
 362                 if (status != SUCCESS)
 363                 {
 364                         this->logger->log(this->logger, AUDIT, "Could not install CHILD_SA policy! Deleting IKE_SA");
 365                         return DELETE_ME;
 366                 }
 367                 this->ike_sa->add_child_sa(this->ike_sa, child_sa);
 368         }
 369
 370         /* create new state */
 371         my_host = this->ike_sa->get_my_host(this->ike_sa);
 372         other_host = this->ike_sa->get_other_host(this->ike_sa);
 373         this->logger->log(this->logger, AUDIT, "IKE_SA established between %s - %s, authenticated peer with %s",
 374                                                 my_host->get_address(my_host), other_host->get_address(other_host),
 375                                                 mapping_find(auth_method_m, auth_request->get_auth_method(auth_request)));
 376
 377         this->ike_sa->create_delete_established_ike_sa_job(this->ike_sa,this->sa_config->get_ike_sa_lifetime(this->sa_config));
 378         this->ike_sa->set_new_state(this->ike_sa, (state_t*)ike_sa_established_create(this->ike_sa));
 379         this->public.state_interface.destroy(&(this->public.state_interface));
 380
 381         return SUCCESS;
 382 }
 383
 384 /**
 385  * Implementation of private_ike_sa_init_responded_t.build_idr_payload.
 386  */
 387 static status_t build_idr_payload(private_ike_sa_init_responded_t *this, id_payload_t *request_idi, id_payload_t *request_idr, message_t *response,id_payload_t **response_idr)
 388 {
 389         identification_t *other_id, *my_id = NULL;
 390         init_config_t *init_config;
 391         status_t status;
 392         id_payload_t *idr_response;
 393
 394         other_id = request_idi->get_identification(request_idi);
 395         if (request_idr)
 396         {
 397                 my_id = request_idr->get_identification(request_idr);
 398         }
 399
 400         /* build new sa config */
 401         init_config = this->ike_sa->get_init_config(this->ike_sa);
 402         status = charon->configuration_manager->get_sa_config_for_init_config_and_id(charon->configuration_manager,init_config, other_id,my_id, &(this->sa_config));
 403         if (status != SUCCESS)
 404         {
 405                 if (my_id)
 406                 {
 407                         this->logger->log(this->logger, AUDIT, "IKE_AUTH request uses IDs %s to %s, which we have no config for",
 408                                                         other_id->get_string(other_id),my_id->get_string(my_id));
 409                         my_id->destroy(my_id);
 410                 }
 411                 else
 412                 {
 413                         this->logger->log(this->logger, AUDIT, "IKE_AUTH request uses ID %s, which we have no config for",
 414                                                         other_id->get_string(other_id));
 415                 }
 416                 other_id->destroy(other_id);
 417                 return DELETE_ME;
 418         }
 419
 420         if (my_id)
 421         {
 422                 my_id->destroy(my_id);
 423         }
 424         other_id->destroy(other_id);
 425
 426         /* get my id, if not requested */
 427         my_id = this->sa_config->get_my_id(this->sa_config);
 428
 429         /* set sa_config in ike_sa for other states */
 430         this->ike_sa->set_sa_config(this->ike_sa, this->sa_config);
 431
 432         /*  build response */
 433         idr_response = id_payload_create_from_identification(FALSE, my_id);
 434         response->add_payload(response, (payload_t*)idr_response);
 435         *response_idr = idr_response;
 436
 437         return SUCCESS;
 438 }
 439
 440 /**
 441  * Implementation of private_ike_sa_init_responded_t.build_sa_payload.
 442  */
 443 static status_t build_sa_payload(private_ike_sa_init_responded_t *this, sa_payload_t *request, message_t *response)
 444 {
 445         proposal_t *proposal, *proposal_tmp;
 446         linked_list_t *proposal_list;
 447         sa_payload_t *sa_response;
 448
 449         /* get proposals from request */
 450         proposal_list = request->get_proposals(request);
 451         if (proposal_list->get_count(proposal_list) == 0)
 452         {
 453                 /* if the other side did not offer any proposals, we do not create child sa's */
 454                 this->logger->log(this->logger, AUDIT, "IKE_AUH request did not contain any proposals. No CHILD_SA created");
 455                 sa_response = sa_payload_create();
 456                 response->add_payload(response, (payload_t*)sa_response);
 457                 proposal_list->destroy(proposal_list);
 458                 return SUCCESS;
 459         }
 460
 461         /* now select a proposal */
 462         this->logger->log(this->logger, CONTROL|LEVEL1, "Selecting proposals:");
 463         proposal = this->sa_config->select_proposal(this->sa_config, proposal_list);
 464         /* list is not needed anymore */
 465         while (proposal_list->remove_last(proposal_list, (void**)&proposal_tmp) == SUCCESS)
 466         {
 467                 proposal_tmp->destroy(proposal_tmp);
 468         }
 469         proposal_list->destroy(proposal_list);
 470         /* do we have a proposal */
 471         if (proposal == NULL)
 472         {
 473                 this->logger->log(this->logger, AUDIT, "IKE_AUTH request did not contain any proposals we accept. Deleting IKE_SA");
 474                 this->ike_sa->send_notify(this->ike_sa, IKE_AUTH, NO_PROPOSAL_CHOSEN, CHUNK_INITIALIZER);
 475                 return DELETE_ME;
 476         }
 477
 478         /* apply proposal */
 479         this->proposal = proposal;
 480
 481         /* create payload with selected propsal */
 482         sa_response = sa_payload_create_from_proposal(proposal);
 483         response->add_payload(response, (payload_t*)sa_response);
 484         return SUCCESS;
 485 }
 486
 487 /**
 488  * Implementation of private_ike_sa_init_responded_t.build_auth_payload.
 489  */
 490 static status_t build_auth_payload(private_ike_sa_init_responded_t *this, auth_payload_t *auth_request,id_payload_t *other_id_payload,id_payload_t *my_id_payload, message_t* response)
 491 {
 492         authenticator_t *authenticator;
 493         auth_payload_t *auth_reply;
 494         status_t status;
 495
 496         authenticator = authenticator_create(this->ike_sa);
 497         status =  authenticator->verify_auth_data(authenticator,auth_request, this->ike_sa_init_request_data,this->sent_nonce,other_id_payload,TRUE);
 498
 499         if (status != SUCCESS)
 500         {
 501                 this->logger->log(this->logger, AUDIT, "IKE_AUTH request verification failed. Deleting IKE_SA");
 502                 this->ike_sa->send_notify(this->ike_sa, IKE_AUTH, AUTHENTICATION_FAILED, CHUNK_INITIALIZER);
 503                 authenticator->destroy(authenticator);
 504                 return DELETE_ME;
 505         }
 506
 507         status = authenticator->compute_auth_data(authenticator,&auth_reply, this->ike_sa_init_response_data,this->received_nonce,my_id_payload,FALSE);
 508         authenticator->destroy(authenticator);
 509         if (status != SUCCESS)
 510         {
 511                 this->logger->log(this->logger, AUDIT, "Unable to build authentication data for IKE_AUTH reply. Deleting IKE_SA");
 512                 return DELETE_ME;
 513
 514         }
 515
 516         response->add_payload(response, (payload_t *)auth_reply);
 517         return SUCCESS;
 518 }
 519
 520 /**
 521  * Implementation of private_ike_sa_init_responded_t.build_ts_payload.
 522  */
 523 static status_t build_ts_payload(private_ike_sa_init_responded_t *this, bool ts_initiator, ts_payload_t *request, message_t* response)
 524 {
 525         linked_list_t *ts_received, *ts_selected;
 526         traffic_selector_t *ts;
 527         status_t status = SUCCESS;
 528         ts_payload_t *ts_response;
 529
 530         /* build a reply payload with selected traffic selectors */
 531         ts_received = request->get_traffic_selectors(request);
 532         /* select ts depending on payload type */
 533         if (ts_initiator)
 534         {
 535                 ts_selected = this->sa_config->select_other_traffic_selectors(this->sa_config, ts_received);
 536                 this->other_ts = ts_selected;
 537         }
 538         else
 539         {
 540                 ts_selected = this->sa_config->select_my_traffic_selectors(this->sa_config, ts_received);
 541                 this->my_ts = ts_selected;
 542         }
 543
 544         ts_response = ts_payload_create_from_traffic_selectors(ts_initiator, ts_selected);
 545         response->add_payload(response, (payload_t*)ts_response);
 546
 547         /* cleanup */
 548         while (ts_received->remove_last(ts_received, (void**)&ts) == SUCCESS)
 549         {
 550                 ts->destroy(ts);
 551         }
 552         ts_received->destroy(ts_received);
 553
 554         return status;
 555 }
 556
 557 static status_t process_notify_payload(private_ike_sa_init_responded_t *this, notify_payload_t *notify_payload)
 558 {
 559         notify_message_type_t notify_message_type = notify_payload->get_notify_message_type(notify_payload);
 560
 561         this->logger->log(this->logger, CONTROL|LEVEL1, "Process notify type %s for protocol %s",
 562                                           mapping_find(notify_message_type_m, notify_message_type),
 563                                           mapping_find(protocol_id_m, notify_payload->get_protocol_id(notify_payload)));
 564
 565         switch (notify_message_type)
 566         {
 567                 case SET_WINDOW_SIZE:
 568                 /*
 569                  * TODO Increase window size.
 570                  */
 571                 case INITIAL_CONTACT:
 572                 /*
 573                  * TODO Delete existing IKE_SA's with other Identity.
 574                  */
 575                 default:
 576                 {
 577                         this->logger->log(this->logger, AUDIT, "IKE_AUTH request contained an unknown notify (%d), ignored.", notify_message_type);
 578                 }
 579         }
 580
 581         return SUCCESS;
 582 }
 583
 584 /**
 585  * Implementation of state_t.get_state.
 586  */
 587 static ike_sa_state_t get_state(private_ike_sa_init_responded_t *this)
 588 {
 589         return IKE_SA_INIT_RESPONDED;
 590 }
 591
 592 /**
 593  * Implementation of state_t.get_state.
 594  */
 595 static void destroy(private_ike_sa_init_responded_t *this)
 596 {
 597         allocator_free_chunk(&(this->received_nonce));
 598         allocator_free_chunk(&(this->sent_nonce));
 599         allocator_free_chunk(&(this->ike_sa_init_response_data));
 600         allocator_free_chunk(&(this->ike_sa_init_request_data));
 601         if (this->my_ts)
 602         {
 603                 traffic_selector_t *ts;
 604                 while (this->my_ts->remove_last(this->my_ts, (void**)&ts) == SUCCESS)
 605                 {
 606                         ts->destroy(ts);
 607                 }
 608                 this->my_ts->destroy(this->my_ts);
 609         }
 610         if (this->other_ts)
 611         {
 612                 traffic_selector_t *ts;
 613                 while (this->other_ts->remove_last(this->other_ts, (void**)&ts) == SUCCESS)
 614                 {
 615                         ts->destroy(ts);
 616                 }
 617                 this->other_ts->destroy(this->other_ts);
 618         }
 619         if (this->proposal)
 620         {
 621                 this->proposal->destroy(this->proposal);
 622         }
 623
 624         allocator_free(this);
 625 }
 626
 627 /*
 628  * Described in header.
 629  */
 630 ike_sa_init_responded_t *ike_sa_init_responded_create(protected_ike_sa_t *ike_sa, chunk_t received_nonce, chunk_t sent_nonce,chunk_t ike_sa_init_request_data, chunk_t ike_sa_init_response_data)
 631 {
 632         private_ike_sa_init_responded_t *this = allocator_alloc_thing(private_ike_sa_init_responded_t);
 633
 634         /* interface functions */
 635         this->public.state_interface.process_message = (status_t (*) (state_t *,message_t *)) process_message;
 636         this->public.state_interface.get_state = (ike_sa_state_t (*) (state_t *)) get_state;
 637         this->public.state_interface.destroy  = (void (*) (state_t *)) destroy;
 638
 639         /* private functions */
 640         this->build_idr_payload = build_idr_payload;
 641         this->build_sa_payload = build_sa_payload;
 642         this->build_auth_payload = build_auth_payload;
 643         this->build_ts_payload = build_ts_payload;
 644         this->process_notify_payload = process_notify_payload;
 645
 646         /* private data */
 647         this->ike_sa = ike_sa;
 648         this->received_nonce = received_nonce;
 649         this->sent_nonce = sent_nonce;
 650         this->ike_sa_init_response_data = ike_sa_init_response_data;
 651         this->ike_sa_init_request_data = ike_sa_init_request_data;
 652         this->my_ts = NULL;
 653         this->other_ts = NULL;
 654         this->proposal = NULL;
 655         this->logger = this->ike_sa->get_logger(this->ike_sa);
 656
 657         return &(this->public);
 658 }