Annotation of embedaddon/strongswan/src/libcharon/sa/ikev1/tasks/aggressive_mode.c, revision 1.1
1.1 ! misho 1: /*
! 2: * Copyright (C) 2012 Tobias Brunner
! 3: * HSR Hochschule fuer Technik Rapperswil
! 4: *
! 5: * Copyright (C) 2012 Martin Willi
! 6: * Copyright (C) 2012 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 "aggressive_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_aggressive_mode_t private_aggressive_mode_t;
! 36:
! 37: /**
! 38: * Private members of a aggressive_mode_t task.
! 39: */
! 40: struct private_aggressive_mode_t {
! 41:
! 42: /**
! 43: * Public methods and task_t interface.
! 44: */
! 45: aggressive_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: /**
! 88: * Encoded ID payload, without fixed header
! 89: */
! 90: chunk_t id_data;
! 91:
! 92: /** states of aggressive mode */
! 93: enum {
! 94: AM_INIT,
! 95: AM_AUTH,
! 96: } state;
! 97: };
! 98:
! 99: /**
! 100: * Set IKE_SA to established state
! 101: */
! 102: static bool establish(private_aggressive_mode_t *this)
! 103: {
! 104: if (!charon->bus->authorize(charon->bus, TRUE))
! 105: {
! 106: DBG1(DBG_IKE, "final authorization hook forbids IKE_SA, cancelling");
! 107: return FALSE;
! 108: }
! 109:
! 110: DBG0(DBG_IKE, "IKE_SA %s[%d] established between %H[%Y]...%H[%Y]",
! 111: this->ike_sa->get_name(this->ike_sa),
! 112: this->ike_sa->get_unique_id(this->ike_sa),
! 113: this->ike_sa->get_my_host(this->ike_sa),
! 114: this->ike_sa->get_my_id(this->ike_sa),
! 115: this->ike_sa->get_other_host(this->ike_sa),
! 116: this->ike_sa->get_other_id(this->ike_sa));
! 117:
! 118: this->ike_sa->set_state(this->ike_sa, IKE_ESTABLISHED);
! 119: charon->bus->ike_updown(charon->bus, this->ike_sa, TRUE);
! 120:
! 121: return TRUE;
! 122: }
! 123:
! 124: /**
! 125: * Check for notify errors, return TRUE if error found
! 126: */
! 127: static bool has_notify_errors(private_aggressive_mode_t *this, message_t *message)
! 128: {
! 129: enumerator_t *enumerator;
! 130: payload_t *payload;
! 131: bool err = FALSE;
! 132:
! 133: enumerator = message->create_payload_enumerator(message);
! 134: while (enumerator->enumerate(enumerator, &payload))
! 135: {
! 136: if (payload->get_type(payload) == PLV1_NOTIFY)
! 137: {
! 138: notify_payload_t *notify;
! 139: notify_type_t type;
! 140:
! 141: notify = (notify_payload_t*)payload;
! 142: type = notify->get_notify_type(notify);
! 143: if (type < 16384)
! 144: {
! 145: DBG1(DBG_IKE, "received %N error notify",
! 146: notify_type_names, type);
! 147: err = TRUE;
! 148: }
! 149: else
! 150: {
! 151: DBG1(DBG_IKE, "received %N notify", notify_type_names, type);
! 152: }
! 153: }
! 154: }
! 155: enumerator->destroy(enumerator);
! 156:
! 157: return err;
! 158: }
! 159:
! 160: /**
! 161: * Queue a task sending a notify in an INFORMATIONAL exchange
! 162: */
! 163: static status_t send_notify(private_aggressive_mode_t *this, notify_type_t type)
! 164: {
! 165: notify_payload_t *notify;
! 166: ike_sa_id_t *ike_sa_id;
! 167: uint64_t spi_i, spi_r;
! 168: chunk_t spi;
! 169:
! 170: notify = notify_payload_create_from_protocol_and_type(PLV1_NOTIFY,
! 171: PROTO_IKE, type);
! 172: ike_sa_id = this->ike_sa->get_id(this->ike_sa);
! 173: spi_i = ike_sa_id->get_initiator_spi(ike_sa_id);
! 174: spi_r = ike_sa_id->get_responder_spi(ike_sa_id);
! 175: spi = chunk_cata("cc", chunk_from_thing(spi_i), chunk_from_thing(spi_r));
! 176: notify->set_spi_data(notify, spi);
! 177:
! 178: this->ike_sa->queue_task(this->ike_sa,
! 179: (task_t*)informational_create(this->ike_sa, notify));
! 180: /* cancel all active/passive tasks in favour of informational */
! 181: this->ike_sa->flush_queue(this->ike_sa,
! 182: this->initiator ? TASK_QUEUE_ACTIVE : TASK_QUEUE_PASSIVE);
! 183: return ALREADY_DONE;
! 184: }
! 185:
! 186: /**
! 187: * Queue a delete task if authentication failed as initiator
! 188: */
! 189: static status_t send_delete(private_aggressive_mode_t *this)
! 190: {
! 191: this->ike_sa->queue_task(this->ike_sa,
! 192: (task_t*)isakmp_delete_create(this->ike_sa, TRUE));
! 193: /* cancel all active tasks in favour of informational */
! 194: this->ike_sa->flush_queue(this->ike_sa,
! 195: this->initiator ? TASK_QUEUE_ACTIVE : TASK_QUEUE_PASSIVE);
! 196: return ALREADY_DONE;
! 197: }
! 198:
! 199: /**
! 200: * Schedule a timeout for the IKE_SA should it not establish
! 201: */
! 202: static void schedule_timeout(ike_sa_t *ike_sa)
! 203: {
! 204: job_t *job;
! 205:
! 206: job = (job_t*)delete_ike_sa_job_create(ike_sa->get_id(ike_sa), FALSE);
! 207: lib->scheduler->schedule_job(lib->scheduler, job, HALF_OPEN_IKE_SA_TIMEOUT);
! 208: }
! 209:
! 210: METHOD(task_t, build_i, status_t,
! 211: private_aggressive_mode_t *this, message_t *message)
! 212: {
! 213: switch (this->state)
! 214: {
! 215: case AM_INIT:
! 216: {
! 217: sa_payload_t *sa_payload;
! 218: id_payload_t *id_payload;
! 219: linked_list_t *proposals;
! 220: identification_t *id;
! 221: packet_t *packet;
! 222: uint16_t group;
! 223:
! 224: DBG0(DBG_IKE, "initiating Aggressive Mode IKE_SA %s[%d] to %H",
! 225: this->ike_sa->get_name(this->ike_sa),
! 226: this->ike_sa->get_unique_id(this->ike_sa),
! 227: this->ike_sa->get_other_host(this->ike_sa));
! 228: this->ike_sa->set_state(this->ike_sa, IKE_CONNECTING);
! 229:
! 230: this->ike_cfg = this->ike_sa->get_ike_cfg(this->ike_sa);
! 231: this->peer_cfg = this->ike_sa->get_peer_cfg(this->ike_sa);
! 232: this->peer_cfg->get_ref(this->peer_cfg);
! 233:
! 234: this->method = this->ph1->get_auth_method(this->ph1, this->peer_cfg);
! 235: if (this->method == AUTH_NONE)
! 236: {
! 237: DBG1(DBG_CFG, "configuration uses unsupported authentication");
! 238: return FAILED;
! 239: }
! 240: this->lifetime = this->peer_cfg->get_reauth_time(this->peer_cfg,
! 241: FALSE);
! 242: if (!this->lifetime)
! 243: { /* fall back to rekey time of no rekey time configured */
! 244: this->lifetime = this->peer_cfg->get_rekey_time(this->peer_cfg,
! 245: FALSE);
! 246: }
! 247: this->lifetime += this->peer_cfg->get_over_time(this->peer_cfg);
! 248: proposals = this->ike_cfg->get_proposals(this->ike_cfg);
! 249: sa_payload = sa_payload_create_from_proposals_v1(proposals,
! 250: this->lifetime, 0, this->method, MODE_NONE,
! 251: ENCAP_NONE, 0);
! 252: proposals->destroy_offset(proposals, offsetof(proposal_t, destroy));
! 253:
! 254: message->add_payload(message, &sa_payload->payload_interface);
! 255:
! 256: group = this->ike_cfg->get_dh_group(this->ike_cfg);
! 257: if (group == MODP_NONE)
! 258: {
! 259: DBG1(DBG_IKE, "DH group selection failed");
! 260: return FAILED;
! 261: }
! 262: if (!this->ph1->create_dh(this->ph1, group))
! 263: {
! 264: DBG1(DBG_IKE, "DH group %N not supported",
! 265: diffie_hellman_group_names, group);
! 266: return FAILED;
! 267: }
! 268: if (!this->ph1->add_nonce_ke(this->ph1, message))
! 269: {
! 270: return FAILED;
! 271: }
! 272: id = this->ph1->get_id(this->ph1, this->peer_cfg, TRUE);
! 273: this->ike_sa->set_my_id(this->ike_sa, id->clone(id));
! 274: id_payload = id_payload_create_from_identification(PLV1_ID, id);
! 275: this->id_data = id_payload->get_encoded(id_payload);
! 276: message->add_payload(message, &id_payload->payload_interface);
! 277:
! 278: /* pregenerate message to store SA payload */
! 279: if (this->ike_sa->generate_message(this->ike_sa, message,
! 280: &packet) != SUCCESS)
! 281: {
! 282: DBG1(DBG_IKE, "pregenerating SA payload failed");
! 283: return FAILED;
! 284: }
! 285: packet->destroy(packet);
! 286: if (!this->ph1->save_sa_payload(this->ph1, message))
! 287: {
! 288: DBG1(DBG_IKE, "SA payload invalid");
! 289: return FAILED;
! 290: }
! 291: this->state = AM_AUTH;
! 292: return NEED_MORE;
! 293: }
! 294: case AM_AUTH:
! 295: {
! 296: if (!this->ph1->build_auth(this->ph1, this->method, message,
! 297: this->id_data))
! 298: {
! 299: this->id_data = chunk_empty;
! 300: charon->bus->alert(charon->bus, ALERT_LOCAL_AUTH_FAILED);
! 301: return send_notify(this, AUTHENTICATION_FAILED);
! 302: }
! 303: this->id_data = chunk_empty;
! 304:
! 305: switch (this->method)
! 306: {
! 307: case AUTH_XAUTH_INIT_PSK:
! 308: case AUTH_XAUTH_INIT_RSA:
! 309: case AUTH_HYBRID_INIT_RSA:
! 310: /* wait for XAUTH request */
! 311: schedule_timeout(this->ike_sa);
! 312: break;
! 313: case AUTH_XAUTH_RESP_PSK:
! 314: case AUTH_XAUTH_RESP_RSA:
! 315: case AUTH_HYBRID_RESP_RSA:
! 316: this->ike_sa->queue_task(this->ike_sa,
! 317: (task_t*)xauth_create(this->ike_sa, TRUE));
! 318: break;
! 319: default:
! 320: if (charon->ike_sa_manager->check_uniqueness(
! 321: charon->ike_sa_manager, this->ike_sa, FALSE))
! 322: {
! 323: DBG1(DBG_IKE, "cancelling Aggressive Mode due to "
! 324: "uniqueness policy");
! 325: return send_notify(this, AUTHENTICATION_FAILED);
! 326: }
! 327: if (!establish(this))
! 328: {
! 329: charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
! 330: return send_notify(this, AUTHENTICATION_FAILED);
! 331: }
! 332: break;
! 333: }
! 334: /* check for and prepare mode config push/pull */
! 335: if (this->ph1->has_virtual_ip(this->ph1, this->peer_cfg))
! 336: {
! 337: if (this->peer_cfg->use_pull_mode(this->peer_cfg))
! 338: {
! 339: this->ike_sa->queue_task(this->ike_sa,
! 340: (task_t*)mode_config_create(this->ike_sa, TRUE, TRUE));
! 341: }
! 342: else
! 343: {
! 344: schedule_timeout(this->ike_sa);
! 345: }
! 346: }
! 347: else if (this->ph1->has_pool(this->ph1, this->peer_cfg))
! 348: {
! 349: if (this->peer_cfg->use_pull_mode(this->peer_cfg))
! 350: {
! 351: schedule_timeout(this->ike_sa);
! 352: }
! 353: else
! 354: {
! 355: this->ike_sa->queue_task(this->ike_sa,
! 356: (task_t*)mode_config_create(this->ike_sa, TRUE, FALSE));
! 357: }
! 358: }
! 359: return SUCCESS;
! 360: }
! 361: default:
! 362: return FAILED;
! 363: }
! 364: }
! 365:
! 366: METHOD(task_t, process_r, status_t,
! 367: private_aggressive_mode_t *this, message_t *message)
! 368: {
! 369: switch (this->state)
! 370: {
! 371: case AM_INIT:
! 372: {
! 373: sa_payload_t *sa_payload;
! 374: id_payload_t *id_payload;
! 375: identification_t *id;
! 376: linked_list_t *list;
! 377: proposal_selection_flag_t flags = PROPOSAL_SKIP_PRIVATE;
! 378: uint16_t group;
! 379:
! 380: this->ike_cfg = this->ike_sa->get_ike_cfg(this->ike_sa);
! 381: DBG0(DBG_IKE, "%H is initiating a Aggressive Mode IKE_SA",
! 382: message->get_source(message));
! 383: this->ike_sa->set_state(this->ike_sa, IKE_CONNECTING);
! 384:
! 385: this->ike_sa->update_hosts(this->ike_sa,
! 386: message->get_destination(message),
! 387: message->get_source(message), TRUE);
! 388:
! 389: sa_payload = (sa_payload_t*)message->get_payload(message,
! 390: PLV1_SECURITY_ASSOCIATION);
! 391: if (!sa_payload)
! 392: {
! 393: DBG1(DBG_IKE, "SA payload missing");
! 394: return send_notify(this, INVALID_PAYLOAD_TYPE);
! 395: }
! 396: if (!this->ph1->save_sa_payload(this->ph1, message))
! 397: {
! 398: return send_notify(this, INVALID_PAYLOAD_TYPE);
! 399: }
! 400:
! 401: list = sa_payload->get_proposals(sa_payload);
! 402: if (!lib->settings->get_bool(lib->settings,
! 403: "%s.prefer_configured_proposals", TRUE, lib->ns))
! 404: {
! 405: flags = PROPOSAL_PREFER_SUPPLIED;
! 406: }
! 407: this->proposal = this->ike_cfg->select_proposal(this->ike_cfg, list,
! 408: flags);
! 409: list->destroy_offset(list, offsetof(proposal_t, destroy));
! 410: if (!this->proposal)
! 411: {
! 412: DBG1(DBG_IKE, "no proposal found");
! 413: return send_notify(this, NO_PROPOSAL_CHOSEN);
! 414: }
! 415: this->ike_sa->set_proposal(this->ike_sa, this->proposal);
! 416:
! 417: this->method = sa_payload->get_auth_method(sa_payload);
! 418: this->lifetime = sa_payload->get_lifetime(sa_payload,
! 419: this->proposal);
! 420:
! 421: switch (this->method)
! 422: {
! 423: case AUTH_XAUTH_INIT_PSK:
! 424: case AUTH_XAUTH_RESP_PSK:
! 425: case AUTH_PSK:
! 426: if (!lib->settings->get_bool(lib->settings, "%s.i_dont_care"
! 427: "_about_security_and_use_aggressive_mode_psk",
! 428: FALSE, lib->ns))
! 429: {
! 430: DBG1(DBG_IKE, "Aggressive Mode PSK disabled for "
! 431: "security reasons");
! 432: charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
! 433: return send_notify(this, AUTHENTICATION_FAILED);
! 434: }
! 435: break;
! 436: default:
! 437: break;
! 438: }
! 439:
! 440: if (!this->proposal->get_algorithm(this->proposal,
! 441: DIFFIE_HELLMAN_GROUP, &group, NULL))
! 442: {
! 443: DBG1(DBG_IKE, "DH group selection failed");
! 444: return send_notify(this, INVALID_KEY_INFORMATION);
! 445: }
! 446: if (!this->ph1->create_dh(this->ph1, group))
! 447: {
! 448: DBG1(DBG_IKE, "negotiated DH group not supported");
! 449: return send_notify(this, INVALID_KEY_INFORMATION);
! 450: }
! 451: if (!this->ph1->get_nonce_ke(this->ph1, message))
! 452: {
! 453: return send_notify(this, INVALID_PAYLOAD_TYPE);
! 454: }
! 455:
! 456: id_payload = (id_payload_t*)message->get_payload(message, PLV1_ID);
! 457: if (!id_payload)
! 458: {
! 459: DBG1(DBG_IKE, "IDii payload missing");
! 460: charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
! 461: return send_notify(this, INVALID_PAYLOAD_TYPE);
! 462: }
! 463:
! 464: id = id_payload->get_identification(id_payload);
! 465: this->id_data = id_payload->get_encoded(id_payload);
! 466: this->ike_sa->set_other_id(this->ike_sa, id);
! 467: this->peer_cfg = this->ph1->select_config(this->ph1,
! 468: this->method, TRUE, id);
! 469: if (!this->peer_cfg)
! 470: {
! 471: charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
! 472: return send_notify(this, AUTHENTICATION_FAILED);
! 473: }
! 474: this->ike_sa->set_peer_cfg(this->ike_sa, this->peer_cfg);
! 475:
! 476: this->state = AM_AUTH;
! 477: if (has_notify_errors(this, message))
! 478: {
! 479: return FAILED;
! 480: }
! 481: return NEED_MORE;
! 482: }
! 483: case AM_AUTH:
! 484: {
! 485: adopt_children_job_t *job = NULL;
! 486: xauth_t *xauth = NULL;
! 487:
! 488: while (TRUE)
! 489: {
! 490: if (this->ph1->verify_auth(this->ph1, this->method, message,
! 491: chunk_clone(this->id_data)))
! 492: {
! 493: break;
! 494: }
! 495: this->peer_cfg->destroy(this->peer_cfg);
! 496: this->peer_cfg = this->ph1->select_config(this->ph1,
! 497: this->method, TRUE, NULL);
! 498: if (!this->peer_cfg)
! 499: {
! 500: charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
! 501: return send_delete(this);
! 502: }
! 503: this->ike_sa->set_peer_cfg(this->ike_sa, this->peer_cfg);
! 504: }
! 505:
! 506: if (!charon->bus->authorize(charon->bus, FALSE))
! 507: {
! 508: DBG1(DBG_IKE, "Aggressive Mode authorization hook forbids "
! 509: "IKE_SA, cancelling");
! 510: charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
! 511: return send_delete(this);
! 512: }
! 513:
! 514: switch (this->method)
! 515: {
! 516: case AUTH_XAUTH_INIT_PSK:
! 517: case AUTH_XAUTH_INIT_RSA:
! 518: case AUTH_HYBRID_INIT_RSA:
! 519: xauth = xauth_create(this->ike_sa, TRUE);
! 520: this->ike_sa->queue_task(this->ike_sa, (task_t*)xauth);
! 521: break;
! 522: case AUTH_XAUTH_RESP_PSK:
! 523: case AUTH_XAUTH_RESP_RSA:
! 524: case AUTH_HYBRID_RESP_RSA:
! 525: /* wait for XAUTH request */
! 526: break;
! 527: default:
! 528: if (charon->ike_sa_manager->check_uniqueness(
! 529: charon->ike_sa_manager, this->ike_sa, FALSE))
! 530: {
! 531: DBG1(DBG_IKE, "cancelling Aggressive Mode due to "
! 532: "uniqueness policy");
! 533: return send_delete(this);
! 534: }
! 535: if (!establish(this))
! 536: {
! 537: charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
! 538: return send_delete(this);
! 539: }
! 540: job = adopt_children_job_create(
! 541: this->ike_sa->get_id(this->ike_sa));
! 542: break;
! 543: }
! 544: /* check for and prepare mode config push/pull */
! 545: if (this->ph1->has_virtual_ip(this->ph1, this->peer_cfg))
! 546: {
! 547: if (this->peer_cfg->use_pull_mode(this->peer_cfg))
! 548: {
! 549: this->ike_sa->queue_task(this->ike_sa,
! 550: (task_t*)mode_config_create(this->ike_sa, TRUE, TRUE));
! 551: }
! 552: }
! 553: else if (this->ph1->has_pool(this->ph1, this->peer_cfg))
! 554: {
! 555: if (!this->peer_cfg->use_pull_mode(this->peer_cfg))
! 556: {
! 557: if (job)
! 558: {
! 559: job->queue_task(job, (task_t*)
! 560: mode_config_create(this->ike_sa, TRUE, FALSE));
! 561: }
! 562: else if (xauth)
! 563: {
! 564: xauth->queue_mode_config_push(xauth);
! 565: }
! 566: else
! 567: {
! 568: this->ike_sa->queue_task(this->ike_sa, (task_t*)
! 569: mode_config_create(this->ike_sa, TRUE, FALSE));
! 570: }
! 571: }
! 572: }
! 573: if (job)
! 574: {
! 575: lib->processor->queue_job(lib->processor, (job_t*)job);
! 576: }
! 577: return SUCCESS;
! 578: }
! 579: default:
! 580: return FAILED;
! 581: }
! 582: }
! 583:
! 584: METHOD(task_t, build_r, status_t,
! 585: private_aggressive_mode_t *this, message_t *message)
! 586: {
! 587: if (this->state == AM_AUTH)
! 588: {
! 589: sa_payload_t *sa_payload;
! 590: id_payload_t *id_payload;
! 591: identification_t *id;
! 592:
! 593: sa_payload = sa_payload_create_from_proposal_v1(this->proposal,
! 594: this->lifetime, 0, this->method, MODE_NONE,
! 595: ENCAP_NONE, 0);
! 596: message->add_payload(message, &sa_payload->payload_interface);
! 597:
! 598: if (!this->ph1->add_nonce_ke(this->ph1, message))
! 599: {
! 600: return send_notify(this, INVALID_KEY_INFORMATION);
! 601: }
! 602: if (!this->ph1->create_hasher(this->ph1))
! 603: {
! 604: return send_notify(this, NO_PROPOSAL_CHOSEN);
! 605: }
! 606: if (!this->ph1->derive_keys(this->ph1, this->peer_cfg, this->method))
! 607: {
! 608: return send_notify(this, INVALID_KEY_INFORMATION);
! 609: }
! 610:
! 611: id = this->ph1->get_id(this->ph1, this->peer_cfg, TRUE);
! 612: this->ike_sa->set_my_id(this->ike_sa, id->clone(id));
! 613:
! 614: id_payload = id_payload_create_from_identification(PLV1_ID, id);
! 615: message->add_payload(message, &id_payload->payload_interface);
! 616:
! 617: if (!this->ph1->build_auth(this->ph1, this->method, message,
! 618: id_payload->get_encoded(id_payload)))
! 619: {
! 620: charon->bus->alert(charon->bus, ALERT_LOCAL_AUTH_FAILED);
! 621: return send_notify(this, AUTHENTICATION_FAILED);
! 622: }
! 623: return NEED_MORE;
! 624: }
! 625: return FAILED;
! 626: }
! 627:
! 628: METHOD(task_t, process_i, status_t,
! 629: private_aggressive_mode_t *this, message_t *message)
! 630: {
! 631: if (this->state == AM_AUTH)
! 632: {
! 633: auth_method_t method;
! 634: sa_payload_t *sa_payload;
! 635: id_payload_t *id_payload;
! 636: identification_t *id, *cid;
! 637: linked_list_t *list;
! 638: uint32_t lifetime;
! 639:
! 640: sa_payload = (sa_payload_t*)message->get_payload(message,
! 641: PLV1_SECURITY_ASSOCIATION);
! 642: if (!sa_payload)
! 643: {
! 644: DBG1(DBG_IKE, "SA payload missing");
! 645: return send_notify(this, INVALID_PAYLOAD_TYPE);
! 646: }
! 647: list = sa_payload->get_proposals(sa_payload);
! 648: this->proposal = this->ike_cfg->select_proposal(this->ike_cfg, list, 0);
! 649: list->destroy_offset(list, offsetof(proposal_t, destroy));
! 650: if (!this->proposal)
! 651: {
! 652: DBG1(DBG_IKE, "no proposal found");
! 653: return send_notify(this, NO_PROPOSAL_CHOSEN);
! 654: }
! 655: this->ike_sa->set_proposal(this->ike_sa, this->proposal);
! 656:
! 657: lifetime = sa_payload->get_lifetime(sa_payload, this->proposal);
! 658: if (lifetime != this->lifetime)
! 659: {
! 660: DBG1(DBG_IKE, "received lifetime %us does not match configured "
! 661: "lifetime %us", lifetime, this->lifetime);
! 662: }
! 663: this->lifetime = lifetime;
! 664: method = sa_payload->get_auth_method(sa_payload);
! 665: if (method != this->method)
! 666: {
! 667: DBG1(DBG_IKE, "received %N authentication, but configured %N, "
! 668: "continue with configured", auth_method_names, method,
! 669: auth_method_names, this->method);
! 670: }
! 671: if (!this->ph1->get_nonce_ke(this->ph1, message))
! 672: {
! 673: return send_notify(this, INVALID_PAYLOAD_TYPE);
! 674: }
! 675: if (!this->ph1->create_hasher(this->ph1))
! 676: {
! 677: return send_notify(this, NO_PROPOSAL_CHOSEN);
! 678: }
! 679:
! 680: id_payload = (id_payload_t*)message->get_payload(message, PLV1_ID);
! 681: if (!id_payload)
! 682: {
! 683: DBG1(DBG_IKE, "IDir payload missing");
! 684: charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
! 685: return send_delete(this);
! 686: }
! 687: id = id_payload->get_identification(id_payload);
! 688: cid = this->ph1->get_id(this->ph1, this->peer_cfg, FALSE);
! 689: if (cid && !id->matches(id, cid))
! 690: {
! 691: DBG1(DBG_IKE, "IDir '%Y' does not match to '%Y'", id, cid);
! 692: id->destroy(id);
! 693: charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
! 694: return send_notify(this, INVALID_ID_INFORMATION);
! 695: }
! 696: this->ike_sa->set_other_id(this->ike_sa, id);
! 697:
! 698: if (!this->ph1->derive_keys(this->ph1, this->peer_cfg, this->method))
! 699: {
! 700: return send_notify(this, INVALID_KEY_INFORMATION);
! 701: }
! 702: if (!this->ph1->verify_auth(this->ph1, this->method, message,
! 703: id_payload->get_encoded(id_payload)))
! 704: {
! 705: charon->bus->alert(charon->bus, ALERT_PEER_AUTH_FAILED);
! 706: return send_notify(this, AUTHENTICATION_FAILED);
! 707: }
! 708: if (!charon->bus->authorize(charon->bus, FALSE))
! 709: {
! 710: DBG1(DBG_IKE, "Aggressive Mode authorization hook forbids IKE_SA, "
! 711: "cancelling");
! 712: return send_notify(this, AUTHENTICATION_FAILED);
! 713: }
! 714:
! 715: return NEED_MORE;
! 716: }
! 717: return FAILED;
! 718: }
! 719:
! 720: METHOD(task_t, get_type, task_type_t,
! 721: private_aggressive_mode_t *this)
! 722: {
! 723: return TASK_AGGRESSIVE_MODE;
! 724: }
! 725:
! 726: METHOD(task_t, migrate, void,
! 727: private_aggressive_mode_t *this, ike_sa_t *ike_sa)
! 728: {
! 729: DESTROY_IF(this->peer_cfg);
! 730: DESTROY_IF(this->proposal);
! 731: this->ph1->destroy(this->ph1);
! 732: chunk_free(&this->id_data);
! 733:
! 734: this->ike_sa = ike_sa;
! 735: this->state = AM_INIT;
! 736: this->peer_cfg = NULL;
! 737: this->proposal = NULL;
! 738: this->ph1 = phase1_create(ike_sa, this->initiator);
! 739: }
! 740:
! 741: METHOD(task_t, destroy, void,
! 742: private_aggressive_mode_t *this)
! 743: {
! 744: DESTROY_IF(this->peer_cfg);
! 745: DESTROY_IF(this->proposal);
! 746: this->ph1->destroy(this->ph1);
! 747: chunk_free(&this->id_data);
! 748: free(this);
! 749: }
! 750:
! 751: /*
! 752: * Described in header.
! 753: */
! 754: aggressive_mode_t *aggressive_mode_create(ike_sa_t *ike_sa, bool initiator)
! 755: {
! 756: private_aggressive_mode_t *this;
! 757:
! 758: INIT(this,
! 759: .public = {
! 760: .task = {
! 761: .get_type = _get_type,
! 762: .migrate = _migrate,
! 763: .destroy = _destroy,
! 764: },
! 765: },
! 766: .ike_sa = ike_sa,
! 767: .ph1 = phase1_create(ike_sa, initiator),
! 768: .initiator = initiator,
! 769: .state = AM_INIT,
! 770: );
! 771:
! 772: if (initiator)
! 773: {
! 774: this->public.task.build = _build_i;
! 775: this->public.task.process = _process_i;
! 776: }
! 777: else
! 778: {
! 779: this->public.task.build = _build_r;
! 780: this->public.task.process = _process_r;
! 781: }
! 782:
! 783: return &this->public;
! 784: }
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