Annotation of embedaddon/strongswan/src/libcharon/sa/ikev1/tasks/main_mode.c, revision 1.1
1.1 ! misho 1: /*
! 2: * Copyright (C) 2011-2012 Tobias Brunner
! 3: * HSR Hochschule fuer Technik Rapperswil
! 4: *
! 5: * Copyright (C) 2011 Martin Willi
! 6: * Copyright (C) 2011 revosec AG
! 7: *
! 8: * This program is free software; you can redistribute it and/or modify it
! 9: * under the terms of the GNU General Public License as published by the
! 10: * Free Software Foundation; either version 2 of the License, or (at your
! 11: * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
! 12: *
! 13: * This program is distributed in the hope that it will be useful, but
! 14: * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
! 15: * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
! 16: * for more details.
! 17: */
! 18:
! 19: #include "main_mode.h"
! 20:
! 21: #include <string.h>
! 22:
! 23: #include <daemon.h>
! 24: #include <sa/ikev1/phase1.h>
! 25: #include <encoding/payloads/sa_payload.h>
! 26: #include <encoding/payloads/id_payload.h>
! 27: #include <encoding/payloads/hash_payload.h>
! 28: #include <sa/ikev1/tasks/xauth.h>
! 29: #include <sa/ikev1/tasks/mode_config.h>
! 30: #include <sa/ikev1/tasks/informational.h>
! 31: #include <sa/ikev1/tasks/isakmp_delete.h>
! 32: #include <processing/jobs/adopt_children_job.h>
! 33: #include <processing/jobs/delete_ike_sa_job.h>
! 34:
! 35: typedef struct private_main_mode_t private_main_mode_t;
! 36:
! 37: /**
! 38: * Private members of a main_mode_t task.
! 39: */
! 40: struct private_main_mode_t {
! 41:
! 42: /**
! 43: * Public methods and task_t interface.
! 44: */
! 45: main_mode_t public;
! 46:
! 47: /**
! 48: * Assigned IKE_SA.
! 49: */
! 50: ike_sa_t *ike_sa;
! 51:
! 52: /**
! 53: * Are we the initiator?
! 54: */
! 55: bool initiator;
! 56:
! 57: /**
! 58: * Common phase 1 helper class
! 59: */
! 60: phase1_t *ph1;
! 61:
! 62: /**
! 63: * IKE config to establish
! 64: */
! 65: ike_cfg_t *ike_cfg;
! 66:
! 67: /**
! 68: * Peer config to use
! 69: */
! 70: peer_cfg_t *peer_cfg;
! 71:
! 72: /**
! 73: * selected IKE proposal
! 74: */
! 75: proposal_t *proposal;
! 76:
! 77: /**
! 78: * Negotiated SA lifetime
! 79: */
! 80: uint32_t lifetime;
! 81:
! 82: /**
! 83: * Negotiated authentication method
! 84: */
! 85: auth_method_t method;
! 86:
! 87: /** states of main mode */
! 88: enum {
! 89: MM_INIT,
! 90: MM_SA,
! 91: MM_KE,
! 92: MM_AUTH,
! 93: } state;
! 94: };
! 95:
! 96: /**
! 97: * Set IKE_SA to established state
! 98: */
! 99: static bool establish(private_main_mode_t *this)
! 100: {
! 101: if (!charon->bus->authorize(charon->bus, TRUE))
! 102: {
! 103: DBG1(DBG_IKE, "final authorization hook forbids IKE_SA, cancelling");
! 104: return FALSE;
! 105: }
! 106:
! 107: DBG0(DBG_IKE, "IKE_SA %s[%d] established between %H[%Y]...%H[%Y]",
! 108: this->ike_sa->get_name(this->ike_sa),
! 109: this->ike_sa->get_unique_id(this->ike_sa),
! 110: this->ike_sa->get_my_host(this->ike_sa),
! 111: this->ike_sa->get_my_id(this->ike_sa),
! 112: this->ike_sa->get_other_host(this->ike_sa),
! 113: this->ike_sa->get_other_id(this->ike_sa));
! 114:
! 115: this->ike_sa->set_state(this->ike_sa, IKE_ESTABLISHED);
! 116: charon->bus->ike_updown(charon->bus, this->ike_sa, TRUE);
! 117:
! 118: return TRUE;
! 119: }
! 120:
! 121: /**
! 122: * Check for notify errors, return TRUE if error found
! 123: */
! 124: static bool has_notify_errors(private_main_mode_t *this, message_t *message)
! 125: {
! 126: enumerator_t *enumerator;
! 127: payload_t *payload;
! 128: bool err = FALSE;
! 129:
! 130: enumerator = message->create_payload_enumerator(message);
! 131: while (enumerator->enumerate(enumerator, &payload))
! 132: {
! 133: if (payload->get_type(payload) == PLV1_NOTIFY)
! 134: {
! 135: notify_payload_t *notify;
! 136: notify_type_t type;
! 137:
! 138: notify = (notify_payload_t*)payload;
! 139: type = notify->get_notify_type(notify);
! 140: if (type < 16384)
! 141: {
! 142: DBG1(DBG_IKE, "received %N error notify",
! 143: notify_type_names, type);
! 144: err = TRUE;
! 145: }
! 146: else if (type == INITIAL_CONTACT_IKEV1)
! 147: {
! 148: if (!this->initiator && this->state == MM_AUTH)
! 149: {
! 150: /* If authenticated and received INITIAL_CONTACT,
! 151: * delete any existing IKE_SAs with that peer.
! 152: * The delete takes place when the SA is checked in due
! 153: * to other id not known until the 3rd message.*/
! 154: this->ike_sa->set_condition(this->ike_sa,
! 155: COND_INIT_CONTACT_SEEN, TRUE);
! 156: }
! 157: }
! 158: else
! 159: {
! 160: DBG1(DBG_IKE, "received %N notify", notify_type_names, type);
! 161: }
! 162: }
! 163: }
! 164: enumerator->destroy(enumerator);
! 165:
! 166: return err;
! 167: }
! 168:
! 169: /**
! 170: * Queue a task sending a notify in an INFORMATIONAL exchange
! 171: */
! 172: static status_t send_notify(private_main_mode_t *this, notify_type_t type)
! 173: {
! 174: notify_payload_t *notify;
! 175: ike_sa_id_t *ike_sa_id;
! 176: uint64_t spi_i, spi_r;
! 177: chunk_t spi;
! 178:
! 179: notify = notify_payload_create_from_protocol_and_type(PLV1_NOTIFY,
! 180: PROTO_IKE, type);
! 181: ike_sa_id = this->ike_sa->get_id(this->ike_sa);
! 182: spi_i = ike_sa_id->get_initiator_spi(ike_sa_id);
! 183: spi_r = ike_sa_id->get_responder_spi(ike_sa_id);
! 184: spi = chunk_cata("cc", chunk_from_thing(spi_i), chunk_from_thing(spi_r));
! 185: notify->set_spi_data(notify, spi);
! 186:
! 187: this->ike_sa->queue_task(this->ike_sa,
! 188: (task_t*)informational_create(this->ike_sa, notify));
! 189: /* cancel all active/passive tasks in favour of informational */
! 190: this->ike_sa->flush_queue(this->ike_sa,
! 191: this->initiator ? TASK_QUEUE_ACTIVE : TASK_QUEUE_PASSIVE);
! 192: return ALREADY_DONE;
! 193: }
! 194:
! 195: /**
! 196: * Queue a delete task if authentication failed as initiator
! 197: */
! 198: static status_t send_delete(private_main_mode_t *this)
! 199: {
! 200: this->ike_sa->queue_task(this->ike_sa,
! 201: (task_t*)isakmp_delete_create(this->ike_sa, TRUE));
! 202: /* cancel all active tasks in favour of informational */
! 203: this->ike_sa->flush_queue(this->ike_sa,
! 204: this->initiator ? TASK_QUEUE_ACTIVE : TASK_QUEUE_PASSIVE);
! 205: return ALREADY_DONE;
! 206: }
! 207:
! 208: /**
! 209: * Add an INITIAL_CONTACT notify if first contact with peer
! 210: */
! 211: static void add_initial_contact(private_main_mode_t *this, message_t *message,
! 212: identification_t *idi)
! 213: {
! 214: identification_t *idr;
! 215: host_t *host;
! 216: notify_payload_t *notify;
! 217: ike_sa_id_t *ike_sa_id;
! 218: uint64_t spi_i, spi_r;
! 219: chunk_t spi;
! 220:
! 221: idr = this->ph1->get_id(this->ph1, this->peer_cfg, FALSE);
! 222: if (idr && !idr->contains_wildcards(idr))
! 223: {
! 224: if (this->peer_cfg->get_unique_policy(this->peer_cfg) != UNIQUE_NEVER)
! 225: {
! 226: host = this->ike_sa->get_other_host(this->ike_sa);
! 227: if (!charon->ike_sa_manager->has_contact(charon->ike_sa_manager,
! 228: idi, idr, host->get_family(host)))
! 229: {
! 230: notify = notify_payload_create_from_protocol_and_type(
! 231: PLV1_NOTIFY, PROTO_IKE, INITIAL_CONTACT_IKEV1);
! 232: ike_sa_id = this->ike_sa->get_id(this->ike_sa);
! 233: spi_i = ike_sa_id->get_initiator_spi(ike_sa_id);
! 234: spi_r = ike_sa_id->get_responder_spi(ike_sa_id);
! 235: spi = chunk_cata("cc", chunk_from_thing(spi_i),
! 236: chunk_from_thing(spi_r));
! 237: notify->set_spi_data(notify, spi);
! 238: message->add_payload(message, (payload_t*)notify);
! 239: }
! 240: }
! 241: }
! 242: }
! 243:
! 244: METHOD(task_t, build_i, status_t,
! 245: private_main_mode_t *this, message_t *message)
! 246: {
! 247: switch (this->state)
! 248: {
! 249: case MM_INIT:
! 250: {
! 251: sa_payload_t *sa_payload;
! 252: linked_list_t *proposals;
! 253: packet_t *packet;
! 254:
! 255: DBG0(DBG_IKE, "initiating Main Mode IKE_SA %s[%d] to %H",
! 256: this->ike_sa->get_name(this->ike_sa),
! 257: this->ike_sa->get_unique_id(this->ike_sa),
! 258: this->ike_sa->get_other_host(this->ike_sa));
! 259: this->ike_sa->set_state(this->ike_sa, IKE_CONNECTING);
! 260:
! 261: this->ike_cfg = this->ike_sa->get_ike_cfg(this->ike_sa);
! 262: this->peer_cfg = this->ike_sa->get_peer_cfg(this->ike_sa);
! 263: this->peer_cfg->get_ref(this->peer_cfg);
! 264:
! 265: this->method = this->ph1->get_auth_method(this->ph1, this->peer_cfg);
! 266: if (this->method == AUTH_NONE)
! 267: {
! 268: DBG1(DBG_CFG, "configuration uses unsupported authentication");
! 269: return FAILED;
! 270: }
! 271: this->lifetime = this->peer_cfg->get_reauth_time(this->peer_cfg,
! 272: FALSE);
! 273: if (!this->lifetime)
! 274: { /* fall back to rekey time of no rekey time configured */
! 275: this->lifetime = this->peer_cfg->get_rekey_time(this->peer_cfg,
! 276: FALSE);
! 277: }
! 278: this->lifetime += this->peer_cfg->get_over_time(this->peer_cfg);
! 279: proposals = this->ike_cfg->get_proposals(this->ike_cfg);
! 280: sa_payload = sa_payload_create_from_proposals_v1(proposals,
! 281: this->lifetime, 0, this->method, MODE_NONE,
! 282: ENCAP_NONE, 0);
! 283: proposals->destroy_offset(proposals, offsetof(proposal_t, destroy));
! 284:
! 285: message->add_payload(message, &sa_payload->payload_interface);
! 286:
! 287: /* pregenerate message to store SA payload */
! 288: if (this->ike_sa->generate_message(this->ike_sa, message,
! 289: &packet) != SUCCESS)
! 290: {
! 291: DBG1(DBG_IKE, "pregenerating SA payload failed");
! 292: return FAILED;
! 293: }
! 294: packet->destroy(packet);
! 295: if (!this->ph1->save_sa_payload(this->ph1, message))
! 296: {
! 297: return FAILED;
! 298: }
! 299:
! 300: this->state = MM_SA;
! 301: return NEED_MORE;
! 302: }
! 303: case MM_SA:
! 304: {
! 305: uint16_t group;
! 306:
! 307: if (!this->ph1->create_hasher(this->ph1))
! 308: {
! 309: return send_notify(this, NO_PROPOSAL_CHOSEN);
! 310: }
! 311: if (!this->proposal->get_algorithm(this->proposal,
! 312: DIFFIE_HELLMAN_GROUP, &group, NULL))
! 313: {
! 314: DBG1(DBG_IKE, "DH group selection failed");
! 315: return send_notify(this, NO_PROPOSAL_CHOSEN);
! 316: }
! 317: if (!this->ph1->create_dh(this->ph1, group))
! 318: {
! 319: DBG1(DBG_IKE, "negotiated DH group not supported");
! 320: return send_notify(this, INVALID_KEY_INFORMATION);
! 321: }
! 322: if (!this->ph1->add_nonce_ke(this->ph1, message))
! 323: {
! 324: return send_notify(this, INVALID_KEY_INFORMATION);
! 325: }
! 326: this->state = MM_KE;
! 327: return NEED_MORE;
! 328: }
! 329: case MM_KE:
! 330: {
! 331: id_payload_t *id_payload;
! 332: identification_t *id;
! 333:
! 334: id = this->ph1->get_id(this->ph1, this->peer_cfg, TRUE);
! 335: this->ike_sa->set_my_id(this->ike_sa, id->clone(id));
! 336: id_payload = id_payload_create_from_identification(PLV1_ID, id);
! 337: message->add_payload(message, &id_payload->payload_interface);
! 338:
! 339: if (!this->ph1->build_auth(this->ph1, this->method, message,
! 340: id_payload->get_encoded(id_payload)))
! 341: {
! 342: charon->bus->alert(charon->bus, ALERT_LOCAL_AUTH_FAILED);
! 343: return send_notify(this, AUTHENTICATION_FAILED);
! 344: }
! 345:
! 346: add_initial_contact(this, message, id);
! 347:
! 348: this->state = MM_AUTH;
! 349: return NEED_MORE;
! 350: }
! 351: default:
! 352: return FAILED;
! 353: }
! 354: }
! 355:
! 356: METHOD(task_t, process_r, status_t,
! 357: private_main_mode_t *this, message_t *message)
! 358: {
! 359: switch (this->state)
! 360: {
! 361: case MM_INIT:
! 362: {
! 363: linked_list_t *list;
! 364: sa_payload_t *sa_payload;
! 365: proposal_selection_flag_t flags = 0;
! 366:
! 367: this->ike_cfg = this->ike_sa->get_ike_cfg(this->ike_sa);
! 368: DBG0(DBG_IKE, "%H is initiating a Main Mode IKE_SA",
! 369: message->get_source(message));
! 370: this->ike_sa->set_state(this->ike_sa, IKE_CONNECTING);
! 371:
! 372: this->ike_sa->update_hosts(this->ike_sa,
! 373: message->get_destination(message),
! 374: message->get_source(message), TRUE);
! 375:
! 376: sa_payload = (sa_payload_t*)message->get_payload(message,
! 377: PLV1_SECURITY_ASSOCIATION);
! 378: if (!sa_payload)
! 379: {
! 380: DBG1(DBG_IKE, "SA payload missing");
! 381: return send_notify(this, INVALID_PAYLOAD_TYPE);
! 382: }
! 383: if (!this->ph1->save_sa_payload(this->ph1, message))
! 384: {
! 385: return send_notify(this, INVALID_PAYLOAD_TYPE);
! 386: }
! 387:
! 388: list = sa_payload->get_proposals(sa_payload);
! 389: if (!this->ike_sa->supports_extension(this->ike_sa, EXT_STRONGSWAN)
! 390: && !lib->settings->get_bool(lib->settings,
! 391: "%s.accept_private_algs", FALSE, lib->ns))
! 392: {
! 393: flags |= PROPOSAL_SKIP_PRIVATE;
! 394: }
! 395: if (!lib->settings->get_bool(lib->settings,
! 396: "%s.prefer_configured_proposals", TRUE, lib->ns))
! 397: {
! 398: flags |= PROPOSAL_PREFER_SUPPLIED;
! 399: }
! 400: this->proposal = this->ike_cfg->select_proposal(this->ike_cfg,
! 401: list, flags);
! 402: list->destroy_offset(list, offsetof(proposal_t, destroy));
! 403: if (!this->proposal)
! 404: {
! 405: DBG1(DBG_IKE, "no proposal found");
! 406: return send_notify(this, NO_PROPOSAL_CHOSEN);
! 407: }
! 408: this->ike_sa->set_proposal(this->ike_sa, this->proposal);
! 409:
! 410: this->method = sa_payload->get_auth_method(sa_payload);
! 411: this->lifetime = sa_payload->get_lifetime(sa_payload,
! 412: this->proposal);
! 413:
! 414: this->state = MM_SA;
! 415: return NEED_MORE;
! 416: }
! 417: case MM_SA:
! 418: {
! 419: uint16_t group;
! 420:
! 421: if (!this->ph1->create_hasher(this->ph1))
! 422: {
! 423: return send_notify(this, INVALID_KEY_INFORMATION);
! 424: }
! 425: if (!this->proposal->get_algorithm(this->proposal,
! 426: DIFFIE_HELLMAN_GROUP, &group, NULL))
! 427: {
! 428: DBG1(DBG_IKE, "DH group selection failed");
! 429: return send_notify(this, INVALID_KEY_INFORMATION);
! 430: }
! 431: if (!this->ph1->create_dh(this->ph1, group))
! 432: {
! 433: DBG1(DBG_IKE, "negotiated DH group not supported");
! 434: return send_notify(this, INVALID_KEY_INFORMATION);
! 435: }
! 436: if (!this->ph1->get_nonce_ke(this->ph1, message))
! 437: {
! 438: return send_notify(this, INVALID_PAYLOAD_TYPE);
! 439: }
! 440: this->state = MM_KE;
! 441: return NEED_MORE;
! 442: }
! 443: case MM_KE:
! 444: {
! 445: id_payload_t *id_payload;
! 446: identification_t *id;
! 447:
! 448: id_payload = (id_payload_t*)message->get_payload(message, PLV1_ID);
! 449: if (!id_payload)
! 450: {
! 451: DBG1(DBG_IKE, "IDii payload missing");
! 452: charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
! 453: return send_notify(this, INVALID_PAYLOAD_TYPE);
! 454: }
! 455: id = id_payload->get_identification(id_payload);
! 456: this->ike_sa->set_other_id(this->ike_sa, id);
! 457:
! 458: while (TRUE)
! 459: {
! 460: DESTROY_IF(this->peer_cfg);
! 461: this->peer_cfg = this->ph1->select_config(this->ph1,
! 462: this->method, FALSE, id);
! 463: if (!this->peer_cfg)
! 464: {
! 465: charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
! 466: return send_notify(this, AUTHENTICATION_FAILED);
! 467: }
! 468: this->ike_sa->set_peer_cfg(this->ike_sa, this->peer_cfg);
! 469:
! 470: if (this->ph1->verify_auth(this->ph1, this->method, message,
! 471: id_payload->get_encoded(id_payload)))
! 472: {
! 473: break;
! 474: }
! 475: }
! 476:
! 477: if (!charon->bus->authorize(charon->bus, FALSE))
! 478: {
! 479: DBG1(DBG_IKE, "Main Mode authorization hook forbids IKE_SA, "
! 480: "cancelling");
! 481: charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
! 482: return send_notify(this, AUTHENTICATION_FAILED);
! 483: }
! 484:
! 485: this->state = MM_AUTH;
! 486: if (has_notify_errors(this, message))
! 487: {
! 488: return FAILED;
! 489: }
! 490: return NEED_MORE;
! 491: }
! 492: default:
! 493: return FAILED;
! 494: }
! 495: }
! 496:
! 497: METHOD(task_t, build_r, status_t,
! 498: private_main_mode_t *this, message_t *message)
! 499: {
! 500: switch (this->state)
! 501: {
! 502: case MM_SA:
! 503: {
! 504: sa_payload_t *sa_payload;
! 505:
! 506: sa_payload = sa_payload_create_from_proposal_v1(this->proposal,
! 507: this->lifetime, 0, this->method, MODE_NONE,
! 508: ENCAP_NONE, 0);
! 509: message->add_payload(message, &sa_payload->payload_interface);
! 510:
! 511: return NEED_MORE;
! 512: }
! 513: case MM_KE:
! 514: {
! 515: if (!this->ph1->add_nonce_ke(this->ph1, message))
! 516: {
! 517: return send_notify(this, INVALID_KEY_INFORMATION);
! 518: }
! 519: if (!this->ph1->derive_keys(this->ph1, this->peer_cfg, this->method))
! 520: {
! 521: return send_notify(this, INVALID_KEY_INFORMATION);
! 522: }
! 523: return NEED_MORE;
! 524: }
! 525: case MM_AUTH:
! 526: {
! 527: id_payload_t *id_payload;
! 528: identification_t *id;
! 529: adopt_children_job_t *job = NULL;
! 530: xauth_t *xauth = NULL;
! 531:
! 532: id = this->ph1->get_id(this->ph1, this->peer_cfg, TRUE);
! 533: this->ike_sa->set_my_id(this->ike_sa, id->clone(id));
! 534:
! 535: id_payload = id_payload_create_from_identification(PLV1_ID, id);
! 536: message->add_payload(message, &id_payload->payload_interface);
! 537:
! 538: if (!this->ph1->build_auth(this->ph1, this->method, message,
! 539: id_payload->get_encoded(id_payload)))
! 540: {
! 541: charon->bus->alert(charon->bus, ALERT_LOCAL_AUTH_FAILED);
! 542: return send_notify(this, AUTHENTICATION_FAILED);
! 543: }
! 544:
! 545: switch (this->method)
! 546: {
! 547: case AUTH_XAUTH_INIT_PSK:
! 548: case AUTH_XAUTH_INIT_RSA:
! 549: case AUTH_HYBRID_INIT_RSA:
! 550: xauth = xauth_create(this->ike_sa, TRUE);
! 551: this->ike_sa->queue_task(this->ike_sa, (task_t*)xauth);
! 552: break;
! 553: case AUTH_XAUTH_RESP_PSK:
! 554: case AUTH_XAUTH_RESP_RSA:
! 555: case AUTH_HYBRID_RESP_RSA:
! 556: /* wait for XAUTH request */
! 557: break;
! 558: default:
! 559: if (charon->ike_sa_manager->check_uniqueness(
! 560: charon->ike_sa_manager, this->ike_sa, FALSE))
! 561: {
! 562: DBG1(DBG_IKE, "cancelling Main Mode due to uniqueness "
! 563: "policy");
! 564: return send_notify(this, AUTHENTICATION_FAILED);
! 565: }
! 566: if (!establish(this))
! 567: {
! 568: charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
! 569: return send_notify(this, AUTHENTICATION_FAILED);
! 570: }
! 571: job = adopt_children_job_create(
! 572: this->ike_sa->get_id(this->ike_sa));
! 573: break;
! 574: }
! 575: if (this->ph1->has_virtual_ip(this->ph1, this->peer_cfg))
! 576: {
! 577: if (this->peer_cfg->use_pull_mode(this->peer_cfg))
! 578: {
! 579: this->ike_sa->queue_task(this->ike_sa,
! 580: (task_t*)mode_config_create(this->ike_sa, TRUE, TRUE));
! 581: }
! 582: }
! 583: else if (this->ph1->has_pool(this->ph1, this->peer_cfg))
! 584: {
! 585: if (!this->peer_cfg->use_pull_mode(this->peer_cfg))
! 586: {
! 587: if (job)
! 588: {
! 589: job->queue_task(job, (task_t*)
! 590: mode_config_create(this->ike_sa, TRUE, FALSE));
! 591: }
! 592: else if (xauth)
! 593: {
! 594: xauth->queue_mode_config_push(xauth);
! 595: }
! 596: else
! 597: {
! 598: this->ike_sa->queue_task(this->ike_sa, (task_t*)
! 599: mode_config_create(this->ike_sa, TRUE, FALSE));
! 600: }
! 601: }
! 602: }
! 603: if (job)
! 604: {
! 605: lib->processor->queue_job(lib->processor, (job_t*)job);
! 606: }
! 607: return SUCCESS;
! 608: }
! 609: default:
! 610: return FAILED;
! 611: }
! 612: }
! 613:
! 614: /**
! 615: * Schedule a timeout for the IKE_SA should it not establish
! 616: */
! 617: static void schedule_timeout(ike_sa_t *ike_sa)
! 618: {
! 619: job_t *job;
! 620:
! 621: job = (job_t*)delete_ike_sa_job_create(ike_sa->get_id(ike_sa), FALSE);
! 622: lib->scheduler->schedule_job(lib->scheduler, job, HALF_OPEN_IKE_SA_TIMEOUT);
! 623: }
! 624:
! 625: METHOD(task_t, process_i, status_t,
! 626: private_main_mode_t *this, message_t *message)
! 627: {
! 628: switch (this->state)
! 629: {
! 630: case MM_SA:
! 631: {
! 632: linked_list_t *list;
! 633: sa_payload_t *sa_payload;
! 634: auth_method_t method;
! 635: proposal_selection_flag_t flags = 0;
! 636: uint32_t lifetime;
! 637:
! 638: sa_payload = (sa_payload_t*)message->get_payload(message,
! 639: PLV1_SECURITY_ASSOCIATION);
! 640: if (!sa_payload)
! 641: {
! 642: DBG1(DBG_IKE, "SA payload missing");
! 643: return send_notify(this, INVALID_PAYLOAD_TYPE);
! 644: }
! 645: list = sa_payload->get_proposals(sa_payload);
! 646: if (!this->ike_sa->supports_extension(this->ike_sa, EXT_STRONGSWAN)
! 647: && !lib->settings->get_bool(lib->settings,
! 648: "%s.accept_private_algs", FALSE, lib->ns))
! 649: {
! 650: flags |= PROPOSAL_SKIP_PRIVATE;
! 651: }
! 652: this->proposal = this->ike_cfg->select_proposal(this->ike_cfg,
! 653: list, flags);
! 654: list->destroy_offset(list, offsetof(proposal_t, destroy));
! 655: if (!this->proposal)
! 656: {
! 657: DBG1(DBG_IKE, "no proposal found");
! 658: return send_notify(this, NO_PROPOSAL_CHOSEN);
! 659: }
! 660: this->ike_sa->set_proposal(this->ike_sa, this->proposal);
! 661:
! 662: lifetime = sa_payload->get_lifetime(sa_payload, this->proposal);
! 663: if (lifetime != this->lifetime)
! 664: {
! 665: DBG1(DBG_IKE, "received lifetime %us does not match configured "
! 666: "lifetime %us", lifetime, this->lifetime);
! 667: }
! 668: this->lifetime = lifetime;
! 669: method = sa_payload->get_auth_method(sa_payload);
! 670: if (method != this->method)
! 671: {
! 672: DBG1(DBG_IKE, "received %N authentication, but configured %N, "
! 673: "continue with configured", auth_method_names, method,
! 674: auth_method_names, this->method);
! 675: }
! 676: return NEED_MORE;
! 677: }
! 678: case MM_KE:
! 679: {
! 680: if (!this->ph1->get_nonce_ke(this->ph1, message))
! 681: {
! 682: return send_notify(this, INVALID_PAYLOAD_TYPE);
! 683: }
! 684: if (!this->ph1->derive_keys(this->ph1, this->peer_cfg, this->method))
! 685: {
! 686: return send_notify(this, INVALID_KEY_INFORMATION);
! 687: }
! 688: return NEED_MORE;
! 689: }
! 690: case MM_AUTH:
! 691: {
! 692: id_payload_t *id_payload;
! 693: identification_t *id, *cid;
! 694:
! 695: id_payload = (id_payload_t*)message->get_payload(message, PLV1_ID);
! 696: if (!id_payload)
! 697: {
! 698: DBG1(DBG_IKE, "IDir payload missing");
! 699: charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
! 700: return send_delete(this);
! 701: }
! 702: id = id_payload->get_identification(id_payload);
! 703: cid = this->ph1->get_id(this->ph1, this->peer_cfg, FALSE);
! 704: if (cid && !id->matches(id, cid))
! 705: {
! 706: DBG1(DBG_IKE, "IDir '%Y' does not match to '%Y'", id, cid);
! 707: id->destroy(id);
! 708: charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
! 709: return send_delete(this);
! 710: }
! 711: this->ike_sa->set_other_id(this->ike_sa, id);
! 712:
! 713: if (!this->ph1->verify_auth(this->ph1, this->method, message,
! 714: id_payload->get_encoded(id_payload)))
! 715: {
! 716: charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
! 717: return send_delete(this);
! 718: }
! 719: if (!charon->bus->authorize(charon->bus, FALSE))
! 720: {
! 721: DBG1(DBG_IKE, "Main Mode authorization hook forbids IKE_SA, "
! 722: "cancelling");
! 723: charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
! 724: return send_delete(this);
! 725: }
! 726:
! 727: switch (this->method)
! 728: {
! 729: case AUTH_XAUTH_INIT_PSK:
! 730: case AUTH_XAUTH_INIT_RSA:
! 731: case AUTH_HYBRID_INIT_RSA:
! 732: /* wait for XAUTH request */
! 733: schedule_timeout(this->ike_sa);
! 734: break;
! 735: case AUTH_XAUTH_RESP_PSK:
! 736: case AUTH_XAUTH_RESP_RSA:
! 737: case AUTH_HYBRID_RESP_RSA:
! 738: this->ike_sa->queue_task(this->ike_sa,
! 739: (task_t*)xauth_create(this->ike_sa, TRUE));
! 740: break;
! 741: default:
! 742: if (charon->ike_sa_manager->check_uniqueness(
! 743: charon->ike_sa_manager, this->ike_sa, FALSE))
! 744: {
! 745: DBG1(DBG_IKE, "cancelling Main Mode due to uniqueness "
! 746: "policy");
! 747: return send_delete(this);
! 748: }
! 749: if (!establish(this))
! 750: {
! 751: charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
! 752: return send_delete(this);
! 753: }
! 754: break;
! 755: }
! 756: /* check for and prepare mode config push/pull */
! 757: if (this->ph1->has_virtual_ip(this->ph1, this->peer_cfg))
! 758: {
! 759: if (this->peer_cfg->use_pull_mode(this->peer_cfg))
! 760: {
! 761: this->ike_sa->queue_task(this->ike_sa,
! 762: (task_t*)mode_config_create(this->ike_sa, TRUE, TRUE));
! 763: }
! 764: else
! 765: {
! 766: schedule_timeout(this->ike_sa);
! 767: }
! 768: }
! 769: else if (this->ph1->has_pool(this->ph1, this->peer_cfg))
! 770: {
! 771: if (this->peer_cfg->use_pull_mode(this->peer_cfg))
! 772: {
! 773: schedule_timeout(this->ike_sa);
! 774: }
! 775: else
! 776: {
! 777: this->ike_sa->queue_task(this->ike_sa,
! 778: (task_t*)mode_config_create(this->ike_sa, TRUE, FALSE));
! 779: }
! 780: }
! 781: return SUCCESS;
! 782: }
! 783: default:
! 784: return FAILED;
! 785: }
! 786: }
! 787:
! 788: METHOD(task_t, get_type, task_type_t,
! 789: private_main_mode_t *this)
! 790: {
! 791: return TASK_MAIN_MODE;
! 792: }
! 793:
! 794: METHOD(task_t, migrate, void,
! 795: private_main_mode_t *this, ike_sa_t *ike_sa)
! 796: {
! 797: DESTROY_IF(this->peer_cfg);
! 798: DESTROY_IF(this->proposal);
! 799: this->ph1->destroy(this->ph1);
! 800:
! 801: this->ike_sa = ike_sa;
! 802: this->state = MM_INIT;
! 803: this->peer_cfg = NULL;
! 804: this->proposal = NULL;
! 805: this->ph1 = phase1_create(ike_sa, this->initiator);
! 806: }
! 807:
! 808: METHOD(task_t, destroy, void,
! 809: private_main_mode_t *this)
! 810: {
! 811: DESTROY_IF(this->peer_cfg);
! 812: DESTROY_IF(this->proposal);
! 813: this->ph1->destroy(this->ph1);
! 814: free(this);
! 815: }
! 816:
! 817: /*
! 818: * Described in header.
! 819: */
! 820: main_mode_t *main_mode_create(ike_sa_t *ike_sa, bool initiator)
! 821: {
! 822: private_main_mode_t *this;
! 823:
! 824: INIT(this,
! 825: .public = {
! 826: .task = {
! 827: .get_type = _get_type,
! 828: .migrate = _migrate,
! 829: .destroy = _destroy,
! 830: },
! 831: },
! 832: .ike_sa = ike_sa,
! 833: .ph1 = phase1_create(ike_sa, initiator),
! 834: .initiator = initiator,
! 835: .state = MM_INIT,
! 836: );
! 837:
! 838: if (initiator)
! 839: {
! 840: this->public.task.build = _build_i;
! 841: this->public.task.process = _process_i;
! 842: }
! 843: else
! 844: {
! 845: this->public.task.build = _build_r;
! 846: this->public.task.process = _process_r;
! 847: }
! 848:
! 849: return &this->public;
! 850: }
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