1 /*
2 * wpa_supplicant - IBSS RSN
3 * Copyright (c) 2009, Jouni Malinen <j@w1.fi>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * Alternatively, this software may be distributed under the terms of BSD
10 * license.
11 *
12 * See README and COPYING for more details.
13 */
14
15 #include "includes.h"
16
17 #include "common.h"
18 #include "l2_packet/l2_packet.h"
19 #include "rsn_supp/wpa.h"
20 #include "rsn_supp/wpa_ie.h"
21 #include "ap/wpa_auth.h"
22 #include "wpa_supplicant_i.h"
23 #include "driver_i.h"
24 #include "ibss_rsn.h"
25
26
ibss_rsn_free(struct ibss_rsn_peer * peer)27 static void ibss_rsn_free(struct ibss_rsn_peer *peer)
28 {
29 wpa_auth_sta_deinit(peer->auth);
30 wpa_sm_deinit(peer->supp);
31 os_free(peer);
32 }
33
34
supp_set_state(void * ctx,enum wpa_states state)35 static void supp_set_state(void *ctx, enum wpa_states state)
36 {
37 struct ibss_rsn_peer *peer = ctx;
38 peer->supp_state = state;
39 }
40
41
supp_get_state(void * ctx)42 static enum wpa_states supp_get_state(void *ctx)
43 {
44 struct ibss_rsn_peer *peer = ctx;
45 return peer->supp_state;
46 }
47
48
supp_ether_send(void * ctx,const u8 * dest,u16 proto,const u8 * buf,size_t len)49 static int supp_ether_send(void *ctx, const u8 *dest, u16 proto, const u8 *buf,
50 size_t len)
51 {
52 struct ibss_rsn_peer *peer = ctx;
53 struct wpa_supplicant *wpa_s = peer->ibss_rsn->wpa_s;
54
55 wpa_printf(MSG_DEBUG, "SUPP: %s(dest=" MACSTR " proto=0x%04x "
56 "len=%lu)",
57 __func__, MAC2STR(dest), proto, (unsigned long) len);
58
59 if (wpa_s->l2)
60 return l2_packet_send(wpa_s->l2, dest, proto, buf, len);
61
62 return wpa_drv_send_eapol(wpa_s, dest, proto, buf, len);
63 }
64
65
supp_alloc_eapol(void * ctx,u8 type,const void * data,u16 data_len,size_t * msg_len,void ** data_pos)66 static u8 * supp_alloc_eapol(void *ctx, u8 type, const void *data,
67 u16 data_len, size_t *msg_len, void **data_pos)
68 {
69 struct ieee802_1x_hdr *hdr;
70
71 wpa_printf(MSG_DEBUG, "SUPP: %s(type=%d data_len=%d)",
72 __func__, type, data_len);
73
74 *msg_len = sizeof(*hdr) + data_len;
75 hdr = os_malloc(*msg_len);
76 if (hdr == NULL)
77 return NULL;
78
79 hdr->version = 2;
80 hdr->type = type;
81 hdr->length = host_to_be16(data_len);
82
83 if (data)
84 os_memcpy(hdr + 1, data, data_len);
85 else
86 os_memset(hdr + 1, 0, data_len);
87
88 if (data_pos)
89 *data_pos = hdr + 1;
90
91 return (u8 *) hdr;
92 }
93
94
supp_get_beacon_ie(void * ctx)95 static int supp_get_beacon_ie(void *ctx)
96 {
97 struct ibss_rsn_peer *peer = ctx;
98
99 wpa_printf(MSG_DEBUG, "SUPP: %s", __func__);
100 /* TODO: get correct RSN IE */
101 return wpa_sm_set_ap_rsn_ie(peer->supp,
102 (u8 *) "\x30\x14\x01\x00"
103 "\x00\x0f\xac\x04"
104 "\x01\x00\x00\x0f\xac\x04"
105 "\x01\x00\x00\x0f\xac\x02"
106 "\x00\x00", 22);
107 }
108
109
supp_set_key(void * ctx,enum wpa_alg alg,const u8 * addr,int key_idx,int set_tx,const u8 * seq,size_t seq_len,const u8 * key,size_t key_len)110 static int supp_set_key(void *ctx, enum wpa_alg alg,
111 const u8 *addr, int key_idx, int set_tx,
112 const u8 *seq, size_t seq_len,
113 const u8 *key, size_t key_len)
114 {
115 struct ibss_rsn_peer *peer = ctx;
116
117 wpa_printf(MSG_DEBUG, "SUPP: %s(alg=%d addr=" MACSTR " key_idx=%d "
118 "set_tx=%d)",
119 __func__, alg, MAC2STR(addr), key_idx, set_tx);
120 wpa_hexdump(MSG_DEBUG, "SUPP: set_key - seq", seq, seq_len);
121 wpa_hexdump_key(MSG_DEBUG, "SUPP: set_key - key", key, key_len);
122
123 if (key_idx == 0) {
124 /*
125 * In IBSS RSN, the pairwise key from the 4-way handshake
126 * initiated by the peer with highest MAC address is used.
127 */
128 if (os_memcmp(peer->ibss_rsn->wpa_s->own_addr, peer->addr,
129 ETH_ALEN) > 0) {
130 wpa_printf(MSG_DEBUG, "SUPP: Do not use this PTK");
131 return 0;
132 }
133 }
134
135 if (is_broadcast_ether_addr(addr))
136 addr = peer->addr;
137 return wpa_drv_set_key(peer->ibss_rsn->wpa_s, alg, addr, key_idx,
138 set_tx, seq, seq_len, key, key_len);
139 }
140
141
supp_get_network_ctx(void * ctx)142 static void * supp_get_network_ctx(void *ctx)
143 {
144 struct ibss_rsn_peer *peer = ctx;
145 return wpa_supplicant_get_ssid(peer->ibss_rsn->wpa_s);
146 }
147
148
supp_mlme_setprotection(void * ctx,const u8 * addr,int protection_type,int key_type)149 static int supp_mlme_setprotection(void *ctx, const u8 *addr,
150 int protection_type, int key_type)
151 {
152 wpa_printf(MSG_DEBUG, "SUPP: %s(addr=" MACSTR " protection_type=%d "
153 "key_type=%d)",
154 __func__, MAC2STR(addr), protection_type, key_type);
155 return 0;
156 }
157
158
supp_cancel_auth_timeout(void * ctx)159 static void supp_cancel_auth_timeout(void *ctx)
160 {
161 wpa_printf(MSG_DEBUG, "SUPP: %s", __func__);
162 }
163
164
supp_deauthenticate(void * ctx,int reason_code)165 static void supp_deauthenticate(void * ctx, int reason_code)
166 {
167 wpa_printf(MSG_DEBUG, "SUPP: %s (TODO)", __func__);
168 }
169
170
ibss_rsn_supp_init(struct ibss_rsn_peer * peer,const u8 * own_addr,const u8 * psk)171 int ibss_rsn_supp_init(struct ibss_rsn_peer *peer, const u8 *own_addr,
172 const u8 *psk)
173 {
174 struct wpa_sm_ctx *ctx = os_zalloc(sizeof(*ctx));
175 if (ctx == NULL)
176 return -1;
177
178 ctx->ctx = peer;
179 ctx->msg_ctx = peer->ibss_rsn->wpa_s;
180 ctx->set_state = supp_set_state;
181 ctx->get_state = supp_get_state;
182 ctx->ether_send = supp_ether_send;
183 ctx->get_beacon_ie = supp_get_beacon_ie;
184 ctx->alloc_eapol = supp_alloc_eapol;
185 ctx->set_key = supp_set_key;
186 ctx->get_network_ctx = supp_get_network_ctx;
187 ctx->mlme_setprotection = supp_mlme_setprotection;
188 ctx->cancel_auth_timeout = supp_cancel_auth_timeout;
189 ctx->deauthenticate = supp_deauthenticate;
190 peer->supp = wpa_sm_init(ctx);
191 if (peer->supp == NULL) {
192 wpa_printf(MSG_DEBUG, "SUPP: wpa_sm_init() failed");
193 return -1;
194 }
195
196 wpa_sm_set_own_addr(peer->supp, own_addr);
197 wpa_sm_set_param(peer->supp, WPA_PARAM_RSN_ENABLED, 1);
198 wpa_sm_set_param(peer->supp, WPA_PARAM_PROTO, WPA_PROTO_RSN);
199 wpa_sm_set_param(peer->supp, WPA_PARAM_PAIRWISE, WPA_CIPHER_CCMP);
200 wpa_sm_set_param(peer->supp, WPA_PARAM_GROUP, WPA_CIPHER_CCMP);
201 wpa_sm_set_param(peer->supp, WPA_PARAM_KEY_MGMT, WPA_KEY_MGMT_PSK);
202 wpa_sm_set_pmk(peer->supp, psk, PMK_LEN);
203
204 peer->supp_ie_len = sizeof(peer->supp_ie);
205 if (wpa_sm_set_assoc_wpa_ie_default(peer->supp, peer->supp_ie,
206 &peer->supp_ie_len) < 0) {
207 wpa_printf(MSG_DEBUG, "SUPP: wpa_sm_set_assoc_wpa_ie_default()"
208 " failed");
209 return -1;
210 }
211
212 wpa_sm_notify_assoc(peer->supp, peer->addr);
213
214 return 0;
215 }
216
217
auth_logger(void * ctx,const u8 * addr,logger_level level,const char * txt)218 static void auth_logger(void *ctx, const u8 *addr, logger_level level,
219 const char *txt)
220 {
221 if (addr)
222 wpa_printf(MSG_DEBUG, "AUTH: " MACSTR " - %s",
223 MAC2STR(addr), txt);
224 else
225 wpa_printf(MSG_DEBUG, "AUTH: %s", txt);
226 }
227
228
auth_get_psk(void * ctx,const u8 * addr,const u8 * prev_psk)229 static const u8 * auth_get_psk(void *ctx, const u8 *addr, const u8 *prev_psk)
230 {
231 struct ibss_rsn *ibss_rsn = ctx;
232 wpa_printf(MSG_DEBUG, "AUTH: %s (addr=" MACSTR " prev_psk=%p)",
233 __func__, MAC2STR(addr), prev_psk);
234 if (prev_psk)
235 return NULL;
236 return ibss_rsn->psk;
237 }
238
239
auth_send_eapol(void * ctx,const u8 * addr,const u8 * data,size_t data_len,int encrypt)240 static int auth_send_eapol(void *ctx, const u8 *addr, const u8 *data,
241 size_t data_len, int encrypt)
242 {
243 struct ibss_rsn *ibss_rsn = ctx;
244 struct wpa_supplicant *wpa_s = ibss_rsn->wpa_s;
245
246 wpa_printf(MSG_DEBUG, "AUTH: %s(addr=" MACSTR " data_len=%lu "
247 "encrypt=%d)",
248 __func__, MAC2STR(addr), (unsigned long) data_len, encrypt);
249
250 if (wpa_s->l2)
251 return l2_packet_send(wpa_s->l2, addr, ETH_P_EAPOL, data,
252 data_len);
253
254 return wpa_drv_send_eapol(wpa_s, addr, ETH_P_EAPOL, data, data_len);
255 }
256
257
auth_set_key(void * ctx,int vlan_id,enum wpa_alg alg,const u8 * addr,int idx,u8 * key,size_t key_len)258 static int auth_set_key(void *ctx, int vlan_id, enum wpa_alg alg,
259 const u8 *addr, int idx, u8 *key, size_t key_len)
260 {
261 struct ibss_rsn *ibss_rsn = ctx;
262 u8 seq[6];
263
264 os_memset(seq, 0, sizeof(seq));
265
266 if (addr) {
267 wpa_printf(MSG_DEBUG, "AUTH: %s(alg=%d addr=" MACSTR
268 " key_idx=%d)",
269 __func__, alg, MAC2STR(addr), idx);
270 } else {
271 wpa_printf(MSG_DEBUG, "AUTH: %s(alg=%d key_idx=%d)",
272 __func__, alg, idx);
273 }
274 wpa_hexdump_key(MSG_DEBUG, "AUTH: set_key - key", key, key_len);
275
276 if (idx == 0) {
277 /*
278 * In IBSS RSN, the pairwise key from the 4-way handshake
279 * initiated by the peer with highest MAC address is used.
280 */
281 if (addr == NULL ||
282 os_memcmp(ibss_rsn->wpa_s->own_addr, addr, ETH_ALEN) < 0) {
283 wpa_printf(MSG_DEBUG, "AUTH: Do not use this PTK");
284 return 0;
285 }
286 }
287
288 return wpa_drv_set_key(ibss_rsn->wpa_s, alg, addr, idx,
289 1, seq, 6, key, key_len);
290 }
291
292
auth_for_each_sta(void * ctx,int (* cb)(struct wpa_state_machine * sm,void * ctx),void * cb_ctx)293 static int auth_for_each_sta(void *ctx, int (*cb)(struct wpa_state_machine *sm,
294 void *ctx),
295 void *cb_ctx)
296 {
297 struct ibss_rsn *ibss_rsn = ctx;
298 struct ibss_rsn_peer *peer;
299
300 wpa_printf(MSG_DEBUG, "AUTH: for_each_sta");
301
302 for (peer = ibss_rsn->peers; peer; peer = peer->next) {
303 if (peer->auth && cb(peer->auth, cb_ctx))
304 return 1;
305 }
306
307 return 0;
308 }
309
310
ibss_rsn_auth_init_group(struct ibss_rsn * ibss_rsn,const u8 * own_addr)311 static int ibss_rsn_auth_init_group(struct ibss_rsn *ibss_rsn,
312 const u8 *own_addr)
313 {
314 struct wpa_auth_config conf;
315 struct wpa_auth_callbacks cb;
316
317 wpa_printf(MSG_DEBUG, "AUTH: Initializing group state machine");
318
319 os_memset(&conf, 0, sizeof(conf));
320 conf.wpa = 2;
321 conf.wpa_key_mgmt = WPA_KEY_MGMT_PSK;
322 conf.wpa_pairwise = WPA_CIPHER_CCMP;
323 conf.rsn_pairwise = WPA_CIPHER_CCMP;
324 conf.wpa_group = WPA_CIPHER_CCMP;
325 conf.eapol_version = 2;
326 conf.wpa_group_rekey = 600;
327
328 os_memset(&cb, 0, sizeof(cb));
329 cb.ctx = ibss_rsn;
330 cb.logger = auth_logger;
331 cb.send_eapol = auth_send_eapol;
332 cb.get_psk = auth_get_psk;
333 cb.set_key = auth_set_key;
334 cb.for_each_sta = auth_for_each_sta;
335
336 ibss_rsn->auth_group = wpa_init(own_addr, &conf, &cb);
337 if (ibss_rsn->auth_group == NULL) {
338 wpa_printf(MSG_DEBUG, "AUTH: wpa_init() failed");
339 return -1;
340 }
341
342 return 0;
343 }
344
345
ibss_rsn_auth_init(struct ibss_rsn * ibss_rsn,struct ibss_rsn_peer * peer)346 static int ibss_rsn_auth_init(struct ibss_rsn *ibss_rsn,
347 struct ibss_rsn_peer *peer)
348 {
349 peer->auth = wpa_auth_sta_init(ibss_rsn->auth_group, peer->addr);
350 if (peer->auth == NULL) {
351 wpa_printf(MSG_DEBUG, "AUTH: wpa_auth_sta_init() failed");
352 return -1;
353 }
354
355 /* TODO: get peer RSN IE with Probe Request */
356 if (wpa_validate_wpa_ie(ibss_rsn->auth_group, peer->auth,
357 (u8 *) "\x30\x14\x01\x00"
358 "\x00\x0f\xac\x04"
359 "\x01\x00\x00\x0f\xac\x04"
360 "\x01\x00\x00\x0f\xac\x02"
361 "\x00\x00", 22, NULL, 0) !=
362 WPA_IE_OK) {
363 wpa_printf(MSG_DEBUG, "AUTH: wpa_validate_wpa_ie() failed");
364 return -1;
365 }
366
367 if (wpa_auth_sm_event(peer->auth, WPA_ASSOC))
368 return -1;
369
370 if (wpa_auth_sta_associated(ibss_rsn->auth_group, peer->auth))
371 return -1;
372
373 return 0;
374 }
375
376
ibss_rsn_start(struct ibss_rsn * ibss_rsn,const u8 * addr)377 int ibss_rsn_start(struct ibss_rsn *ibss_rsn, const u8 *addr)
378 {
379 struct ibss_rsn_peer *peer;
380
381 if (ibss_rsn == NULL)
382 return -1;
383
384 for (peer = ibss_rsn->peers; peer; peer = peer->next) {
385 if (os_memcmp(addr, peer->addr, ETH_ALEN) == 0) {
386 wpa_printf(MSG_DEBUG, "RSN: IBSS Authenticator and "
387 "Supplicant for peer " MACSTR " already "
388 "running", MAC2STR(addr));
389 return 0;
390 }
391 }
392
393 wpa_printf(MSG_DEBUG, "RSN: Starting IBSS Authenticator and "
394 "Supplicant for peer " MACSTR, MAC2STR(addr));
395
396 peer = os_zalloc(sizeof(*peer));
397 if (peer == NULL)
398 return -1;
399
400 peer->ibss_rsn = ibss_rsn;
401 os_memcpy(peer->addr, addr, ETH_ALEN);
402
403 if (ibss_rsn_supp_init(peer, ibss_rsn->wpa_s->own_addr, ibss_rsn->psk)
404 < 0) {
405 ibss_rsn_free(peer);
406 return -1;
407 }
408
409 if (ibss_rsn_auth_init(ibss_rsn, peer) < 0) {
410 ibss_rsn_free(peer);
411 return -1;
412 }
413
414 peer->next = ibss_rsn->peers;
415 ibss_rsn->peers = peer;
416
417 return 0;
418 }
419
420
ibss_rsn_stop(struct ibss_rsn * ibss_rsn,const u8 * peermac)421 void ibss_rsn_stop(struct ibss_rsn *ibss_rsn, const u8 *peermac)
422 {
423 struct ibss_rsn_peer *peer, *prev;
424
425 if (ibss_rsn == NULL)
426 return;
427
428 if (peermac == NULL) {
429 /* remove all peers */
430 wpa_printf(MSG_DEBUG, "%s: Remove all peers", __func__);
431 peer = ibss_rsn->peers;
432 while (peer) {
433 prev = peer;
434 peer = peer->next;
435 ibss_rsn_free(prev);
436 ibss_rsn->peers = peer;
437 }
438 } else {
439 /* remove specific peer */
440 wpa_printf(MSG_DEBUG, "%s: Remove specific peer " MACSTR,
441 __func__, MAC2STR(peermac));
442
443 for (prev = NULL, peer = ibss_rsn->peers; peer != NULL;
444 prev = peer, peer = peer->next) {
445 if (os_memcmp(peermac, peer->addr, ETH_ALEN) == 0) {
446 if (prev == NULL)
447 ibss_rsn->peers = peer->next;
448 else
449 prev->next = peer->next;
450 ibss_rsn_free(peer);
451 wpa_printf(MSG_DEBUG, "%s: Successfully "
452 "removed a specific peer",
453 __func__);
454 break;
455 }
456 }
457 }
458 }
459
460
ibss_rsn_init(struct wpa_supplicant * wpa_s)461 struct ibss_rsn * ibss_rsn_init(struct wpa_supplicant *wpa_s)
462 {
463 struct ibss_rsn *ibss_rsn;
464
465 ibss_rsn = os_zalloc(sizeof(*ibss_rsn));
466 if (ibss_rsn == NULL)
467 return NULL;
468 ibss_rsn->wpa_s = wpa_s;
469
470 if (ibss_rsn_auth_init_group(ibss_rsn, wpa_s->own_addr) < 0) {
471 ibss_rsn_deinit(ibss_rsn);
472 return NULL;
473 }
474
475 return ibss_rsn;
476 }
477
478
ibss_rsn_deinit(struct ibss_rsn * ibss_rsn)479 void ibss_rsn_deinit(struct ibss_rsn *ibss_rsn)
480 {
481 struct ibss_rsn_peer *peer, *prev;
482
483 if (ibss_rsn == NULL)
484 return;
485
486 peer = ibss_rsn->peers;
487 while (peer) {
488 prev = peer;
489 peer = peer->next;
490 ibss_rsn_free(prev);
491 }
492
493 wpa_deinit(ibss_rsn->auth_group);
494 os_free(ibss_rsn);
495
496 }
497
498
ibss_rsn_eapol_dst_supp(const u8 * buf,size_t len)499 static int ibss_rsn_eapol_dst_supp(const u8 *buf, size_t len)
500 {
501 const struct ieee802_1x_hdr *hdr;
502 const struct wpa_eapol_key *key;
503 u16 key_info;
504 size_t plen;
505
506 /* TODO: Support other EAPOL packets than just EAPOL-Key */
507
508 if (len < sizeof(*hdr) + sizeof(*key))
509 return -1;
510
511 hdr = (const struct ieee802_1x_hdr *) buf;
512 key = (const struct wpa_eapol_key *) (hdr + 1);
513 plen = be_to_host16(hdr->length);
514
515 if (hdr->version < EAPOL_VERSION) {
516 /* TODO: backwards compatibility */
517 }
518 if (hdr->type != IEEE802_1X_TYPE_EAPOL_KEY) {
519 wpa_printf(MSG_DEBUG, "RSN: EAPOL frame (type %u) discarded, "
520 "not a Key frame", hdr->type);
521 return -1;
522 }
523 if (plen > len - sizeof(*hdr) || plen < sizeof(*key)) {
524 wpa_printf(MSG_DEBUG, "RSN: EAPOL frame payload size %lu "
525 "invalid (frame size %lu)",
526 (unsigned long) plen, (unsigned long) len);
527 return -1;
528 }
529
530 if (key->type != EAPOL_KEY_TYPE_RSN) {
531 wpa_printf(MSG_DEBUG, "RSN: EAPOL-Key type (%d) unknown, "
532 "discarded", key->type);
533 return -1;
534 }
535
536 key_info = WPA_GET_BE16(key->key_info);
537
538 return !!(key_info & WPA_KEY_INFO_ACK);
539 }
540
541
ibss_rsn_process_rx_eapol(struct ibss_rsn * ibss_rsn,struct ibss_rsn_peer * peer,const u8 * buf,size_t len)542 static int ibss_rsn_process_rx_eapol(struct ibss_rsn *ibss_rsn,
543 struct ibss_rsn_peer *peer,
544 const u8 *buf, size_t len)
545 {
546 int supp;
547 u8 *tmp;
548
549 supp = ibss_rsn_eapol_dst_supp(buf, len);
550 if (supp < 0)
551 return -1;
552
553 tmp = os_malloc(len);
554 if (tmp == NULL)
555 return -1;
556 os_memcpy(tmp, buf, len);
557 if (supp) {
558 wpa_printf(MSG_DEBUG, "RSN: IBSS RX EAPOL for Supplicant");
559 wpa_sm_rx_eapol(peer->supp, peer->addr, tmp, len);
560 } else {
561 wpa_printf(MSG_DEBUG, "RSN: IBSS RX EAPOL for Authenticator");
562 wpa_receive(ibss_rsn->auth_group, peer->auth, tmp, len);
563 }
564 os_free(tmp);
565
566 return 1;
567 }
568
569
ibss_rsn_rx_eapol(struct ibss_rsn * ibss_rsn,const u8 * src_addr,const u8 * buf,size_t len)570 int ibss_rsn_rx_eapol(struct ibss_rsn *ibss_rsn, const u8 *src_addr,
571 const u8 *buf, size_t len)
572 {
573 struct ibss_rsn_peer *peer;
574
575 if (ibss_rsn == NULL)
576 return -1;
577
578 for (peer = ibss_rsn->peers; peer; peer = peer->next) {
579 if (os_memcmp(src_addr, peer->addr, ETH_ALEN) == 0)
580 return ibss_rsn_process_rx_eapol(ibss_rsn, peer,
581 buf, len);
582 }
583
584 if (ibss_rsn_eapol_dst_supp(buf, len) > 0) {
585 /*
586 * Create new IBSS peer based on an EAPOL message from the peer
587 * Authenticator.
588 */
589 if (ibss_rsn_start(ibss_rsn, src_addr) < 0)
590 return -1;
591 return ibss_rsn_process_rx_eapol(ibss_rsn, ibss_rsn->peers,
592 buf, len);
593 }
594
595 return 0;
596 }
597
598
ibss_rsn_set_psk(struct ibss_rsn * ibss_rsn,const u8 * psk)599 void ibss_rsn_set_psk(struct ibss_rsn *ibss_rsn, const u8 *psk)
600 {
601 if (ibss_rsn == NULL)
602 return;
603 os_memcpy(ibss_rsn->psk, psk, PMK_LEN);
604 }
605