1 /*
2 * hostapd / IEEE 802.11 Management
3 * Copyright (c) 2002-2017, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9 #include "utils/includes.h"
10
11 #ifndef CONFIG_NATIVE_WINDOWS
12
13 #include "utils/common.h"
14 #include "utils/eloop.h"
15 #include "crypto/crypto.h"
16 #include "crypto/sha256.h"
17 #include "crypto/sha384.h"
18 #include "crypto/sha512.h"
19 #include "crypto/random.h"
20 #include "common/ieee802_11_defs.h"
21 #include "common/ieee802_11_common.h"
22 #include "common/wpa_ctrl.h"
23 #include "common/sae.h"
24 #include "common/dpp.h"
25 #include "common/ocv.h"
26 #include "common/wpa_common.h"
27 #include "radius/radius.h"
28 #include "radius/radius_client.h"
29 #include "p2p/p2p.h"
30 #include "wps/wps.h"
31 #include "fst/fst.h"
32 #include "hostapd.h"
33 #include "beacon.h"
34 #include "ieee802_11_auth.h"
35 #include "sta_info.h"
36 #include "ieee802_1x.h"
37 #include "wpa_auth.h"
38 #include "pmksa_cache_auth.h"
39 #include "wmm.h"
40 #include "ap_list.h"
41 #include "accounting.h"
42 #include "ap_config.h"
43 #include "ap_mlme.h"
44 #include "p2p_hostapd.h"
45 #include "ap_drv_ops.h"
46 #include "wnm_ap.h"
47 #include "hw_features.h"
48 #include "ieee802_11.h"
49 #include "dfs.h"
50 #include "mbo_ap.h"
51 #include "rrm.h"
52 #include "taxonomy.h"
53 #include "fils_hlp.h"
54 #include "dpp_hostapd.h"
55 #include "gas_query_ap.h"
56
57
58 #ifdef CONFIG_FILS
59 static struct wpabuf *
60 prepare_auth_resp_fils(struct hostapd_data *hapd,
61 struct sta_info *sta, u16 *resp,
62 struct rsn_pmksa_cache_entry *pmksa,
63 struct wpabuf *erp_resp,
64 const u8 *msk, size_t msk_len,
65 int *is_pub);
66 #endif /* CONFIG_FILS */
67 static void handle_auth(struct hostapd_data *hapd,
68 const struct ieee80211_mgmt *mgmt, size_t len,
69 int rssi, int from_queue);
70
71
hostapd_eid_multi_ap(struct hostapd_data * hapd,u8 * eid)72 u8 * hostapd_eid_multi_ap(struct hostapd_data *hapd, u8 *eid)
73 {
74 u8 multi_ap_val = 0;
75
76 if (!hapd->conf->multi_ap)
77 return eid;
78 if (hapd->conf->multi_ap & BACKHAUL_BSS)
79 multi_ap_val |= MULTI_AP_BACKHAUL_BSS;
80 if (hapd->conf->multi_ap & FRONTHAUL_BSS)
81 multi_ap_val |= MULTI_AP_FRONTHAUL_BSS;
82
83 return eid + add_multi_ap_ie(eid, 9, multi_ap_val);
84 }
85
86
hostapd_eid_supp_rates(struct hostapd_data * hapd,u8 * eid)87 u8 * hostapd_eid_supp_rates(struct hostapd_data *hapd, u8 *eid)
88 {
89 u8 *pos = eid;
90 int i, num, count;
91
92 if (hapd->iface->current_rates == NULL)
93 return eid;
94
95 *pos++ = WLAN_EID_SUPP_RATES;
96 num = hapd->iface->num_rates;
97 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht)
98 num++;
99 if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht)
100 num++;
101 if (num > 8) {
102 /* rest of the rates are encoded in Extended supported
103 * rates element */
104 num = 8;
105 }
106
107 *pos++ = num;
108 for (i = 0, count = 0; i < hapd->iface->num_rates && count < num;
109 i++) {
110 count++;
111 *pos = hapd->iface->current_rates[i].rate / 5;
112 if (hapd->iface->current_rates[i].flags & HOSTAPD_RATE_BASIC)
113 *pos |= 0x80;
114 pos++;
115 }
116
117 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht && count < 8) {
118 count++;
119 *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY;
120 }
121
122 if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht && count < 8) {
123 count++;
124 *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY;
125 }
126
127 return pos;
128 }
129
130
hostapd_eid_ext_supp_rates(struct hostapd_data * hapd,u8 * eid)131 u8 * hostapd_eid_ext_supp_rates(struct hostapd_data *hapd, u8 *eid)
132 {
133 u8 *pos = eid;
134 int i, num, count;
135
136 if (hapd->iface->current_rates == NULL)
137 return eid;
138
139 num = hapd->iface->num_rates;
140 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht)
141 num++;
142 if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht)
143 num++;
144 if (num <= 8)
145 return eid;
146 num -= 8;
147
148 *pos++ = WLAN_EID_EXT_SUPP_RATES;
149 *pos++ = num;
150 for (i = 0, count = 0; i < hapd->iface->num_rates && count < num + 8;
151 i++) {
152 count++;
153 if (count <= 8)
154 continue; /* already in SuppRates IE */
155 *pos = hapd->iface->current_rates[i].rate / 5;
156 if (hapd->iface->current_rates[i].flags & HOSTAPD_RATE_BASIC)
157 *pos |= 0x80;
158 pos++;
159 }
160
161 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht) {
162 count++;
163 if (count > 8)
164 *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY;
165 }
166
167 if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht) {
168 count++;
169 if (count > 8)
170 *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY;
171 }
172
173 return pos;
174 }
175
176
hostapd_own_capab_info(struct hostapd_data * hapd)177 u16 hostapd_own_capab_info(struct hostapd_data *hapd)
178 {
179 int capab = WLAN_CAPABILITY_ESS;
180 int privacy;
181 int dfs;
182 int i;
183
184 /* Check if any of configured channels require DFS */
185 dfs = hostapd_is_dfs_required(hapd->iface);
186 if (dfs < 0) {
187 wpa_printf(MSG_WARNING, "Failed to check if DFS is required; ret=%d",
188 dfs);
189 dfs = 0;
190 }
191
192 if (hapd->iface->num_sta_no_short_preamble == 0 &&
193 hapd->iconf->preamble == SHORT_PREAMBLE)
194 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
195
196 privacy = hapd->conf->ssid.wep.keys_set;
197
198 if (hapd->conf->ieee802_1x &&
199 (hapd->conf->default_wep_key_len ||
200 hapd->conf->individual_wep_key_len))
201 privacy = 1;
202
203 if (hapd->conf->wpa)
204 privacy = 1;
205
206 #ifdef CONFIG_HS20
207 if (hapd->conf->osen)
208 privacy = 1;
209 #endif /* CONFIG_HS20 */
210
211 if (privacy)
212 capab |= WLAN_CAPABILITY_PRIVACY;
213
214 if (hapd->iface->current_mode &&
215 hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G &&
216 hapd->iface->num_sta_no_short_slot_time == 0)
217 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
218
219 /*
220 * Currently, Spectrum Management capability bit is set when directly
221 * requested in configuration by spectrum_mgmt_required or when AP is
222 * running on DFS channel.
223 * TODO: Also consider driver support for TPC to set Spectrum Mgmt bit
224 */
225 if (hapd->iface->current_mode &&
226 hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211A &&
227 (hapd->iconf->spectrum_mgmt_required || dfs))
228 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
229
230 for (i = 0; i < RRM_CAPABILITIES_IE_LEN; i++) {
231 if (hapd->conf->radio_measurements[i]) {
232 capab |= IEEE80211_CAP_RRM;
233 break;
234 }
235 }
236
237 return capab;
238 }
239
240
241 #ifndef CONFIG_NO_RC4
auth_shared_key(struct hostapd_data * hapd,struct sta_info * sta,u16 auth_transaction,const u8 * challenge,int iswep)242 static u16 auth_shared_key(struct hostapd_data *hapd, struct sta_info *sta,
243 u16 auth_transaction, const u8 *challenge,
244 int iswep)
245 {
246 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
247 HOSTAPD_LEVEL_DEBUG,
248 "authentication (shared key, transaction %d)",
249 auth_transaction);
250
251 if (auth_transaction == 1) {
252 if (!sta->challenge) {
253 /* Generate a pseudo-random challenge */
254 u8 key[8];
255
256 sta->challenge = os_zalloc(WLAN_AUTH_CHALLENGE_LEN);
257 if (sta->challenge == NULL)
258 return WLAN_STATUS_UNSPECIFIED_FAILURE;
259
260 if (os_get_random(key, sizeof(key)) < 0) {
261 os_free(sta->challenge);
262 sta->challenge = NULL;
263 return WLAN_STATUS_UNSPECIFIED_FAILURE;
264 }
265
266 rc4_skip(key, sizeof(key), 0,
267 sta->challenge, WLAN_AUTH_CHALLENGE_LEN);
268 }
269 return 0;
270 }
271
272 if (auth_transaction != 3)
273 return WLAN_STATUS_UNSPECIFIED_FAILURE;
274
275 /* Transaction 3 */
276 if (!iswep || !sta->challenge || !challenge ||
277 os_memcmp_const(sta->challenge, challenge,
278 WLAN_AUTH_CHALLENGE_LEN)) {
279 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
280 HOSTAPD_LEVEL_INFO,
281 "shared key authentication - invalid "
282 "challenge-response");
283 return WLAN_STATUS_CHALLENGE_FAIL;
284 }
285
286 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
287 HOSTAPD_LEVEL_DEBUG,
288 "authentication OK (shared key)");
289 sta->flags |= WLAN_STA_AUTH;
290 wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
291 os_free(sta->challenge);
292 sta->challenge = NULL;
293
294 return 0;
295 }
296 #endif /* CONFIG_NO_RC4 */
297
298
send_auth_reply(struct hostapd_data * hapd,const u8 * dst,const u8 * bssid,u16 auth_alg,u16 auth_transaction,u16 resp,const u8 * ies,size_t ies_len,const char * dbg)299 static int send_auth_reply(struct hostapd_data *hapd,
300 const u8 *dst, const u8 *bssid,
301 u16 auth_alg, u16 auth_transaction, u16 resp,
302 const u8 *ies, size_t ies_len, const char *dbg)
303 {
304 struct ieee80211_mgmt *reply;
305 u8 *buf;
306 size_t rlen;
307 int reply_res = WLAN_STATUS_UNSPECIFIED_FAILURE;
308
309 rlen = IEEE80211_HDRLEN + sizeof(reply->u.auth) + ies_len;
310 buf = os_zalloc(rlen);
311 if (buf == NULL)
312 return -1;
313
314 reply = (struct ieee80211_mgmt *) buf;
315 reply->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
316 WLAN_FC_STYPE_AUTH);
317 os_memcpy(reply->da, dst, ETH_ALEN);
318 os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN);
319 os_memcpy(reply->bssid, bssid, ETH_ALEN);
320
321 reply->u.auth.auth_alg = host_to_le16(auth_alg);
322 reply->u.auth.auth_transaction = host_to_le16(auth_transaction);
323 reply->u.auth.status_code = host_to_le16(resp);
324
325 if (ies && ies_len)
326 os_memcpy(reply->u.auth.variable, ies, ies_len);
327
328 wpa_printf(MSG_DEBUG, "authentication reply: STA=" MACSTR
329 " auth_alg=%d auth_transaction=%d resp=%d (IE len=%lu) (dbg=%s)",
330 MAC2STR(dst), auth_alg, auth_transaction,
331 resp, (unsigned long) ies_len, dbg);
332 if (hostapd_drv_send_mlme(hapd, reply, rlen, 0) < 0)
333 wpa_printf(MSG_INFO, "send_auth_reply: send failed");
334 else
335 reply_res = WLAN_STATUS_SUCCESS;
336
337 os_free(buf);
338
339 return reply_res;
340 }
341
342
343 #ifdef CONFIG_IEEE80211R_AP
handle_auth_ft_finish(void * ctx,const u8 * dst,const u8 * bssid,u16 auth_transaction,u16 status,const u8 * ies,size_t ies_len)344 static void handle_auth_ft_finish(void *ctx, const u8 *dst, const u8 *bssid,
345 u16 auth_transaction, u16 status,
346 const u8 *ies, size_t ies_len)
347 {
348 struct hostapd_data *hapd = ctx;
349 struct sta_info *sta;
350 int reply_res;
351
352 reply_res = send_auth_reply(hapd, dst, bssid, WLAN_AUTH_FT,
353 auth_transaction, status, ies, ies_len,
354 "auth-ft-finish");
355
356 sta = ap_get_sta(hapd, dst);
357 if (sta == NULL)
358 return;
359
360 if (sta->added_unassoc && (reply_res != WLAN_STATUS_SUCCESS ||
361 status != WLAN_STATUS_SUCCESS)) {
362 hostapd_drv_sta_remove(hapd, sta->addr);
363 sta->added_unassoc = 0;
364 return;
365 }
366
367 if (status != WLAN_STATUS_SUCCESS)
368 return;
369
370 hostapd_logger(hapd, dst, HOSTAPD_MODULE_IEEE80211,
371 HOSTAPD_LEVEL_DEBUG, "authentication OK (FT)");
372 sta->flags |= WLAN_STA_AUTH;
373 mlme_authenticate_indication(hapd, sta);
374 }
375 #endif /* CONFIG_IEEE80211R_AP */
376
377
378 #ifdef CONFIG_SAE
379
sae_set_state(struct sta_info * sta,enum sae_state state,const char * reason)380 static void sae_set_state(struct sta_info *sta, enum sae_state state,
381 const char *reason)
382 {
383 wpa_printf(MSG_DEBUG, "SAE: State %s -> %s for peer " MACSTR " (%s)",
384 sae_state_txt(sta->sae->state), sae_state_txt(state),
385 MAC2STR(sta->addr), reason);
386 sta->sae->state = state;
387 }
388
389
auth_build_sae_commit(struct hostapd_data * hapd,struct sta_info * sta,int update)390 static struct wpabuf * auth_build_sae_commit(struct hostapd_data *hapd,
391 struct sta_info *sta, int update)
392 {
393 struct wpabuf *buf;
394 const char *password = NULL;
395 struct sae_password_entry *pw;
396 const char *rx_id = NULL;
397
398 if (sta->sae->tmp)
399 rx_id = sta->sae->tmp->pw_id;
400
401 for (pw = hapd->conf->sae_passwords; pw; pw = pw->next) {
402 if (!is_broadcast_ether_addr(pw->peer_addr) &&
403 os_memcmp(pw->peer_addr, sta->addr, ETH_ALEN) != 0)
404 continue;
405 if ((rx_id && !pw->identifier) || (!rx_id && pw->identifier))
406 continue;
407 if (rx_id && pw->identifier &&
408 os_strcmp(rx_id, pw->identifier) != 0)
409 continue;
410 password = pw->password;
411 break;
412 }
413 if (!password)
414 password = hapd->conf->ssid.wpa_passphrase;
415 if (!password) {
416 wpa_printf(MSG_DEBUG, "SAE: No password available");
417 return NULL;
418 }
419
420 if (update &&
421 sae_prepare_commit(hapd->own_addr, sta->addr,
422 (u8 *) password, os_strlen(password), rx_id,
423 sta->sae) < 0) {
424 wpa_printf(MSG_DEBUG, "SAE: Could not pick PWE");
425 return NULL;
426 }
427
428 if (pw && pw->vlan_id) {
429 if (!sta->sae->tmp) {
430 wpa_printf(MSG_INFO,
431 "SAE: No temporary data allocated - cannot store VLAN ID");
432 return NULL;
433 }
434 sta->sae->tmp->vlan_id = pw->vlan_id;
435 }
436
437 buf = wpabuf_alloc(SAE_COMMIT_MAX_LEN +
438 (rx_id ? 3 + os_strlen(rx_id) : 0));
439 if (buf == NULL)
440 return NULL;
441 sae_write_commit(sta->sae, buf, sta->sae->tmp ?
442 sta->sae->tmp->anti_clogging_token : NULL, rx_id);
443
444 return buf;
445 }
446
447
auth_build_sae_confirm(struct hostapd_data * hapd,struct sta_info * sta)448 static struct wpabuf * auth_build_sae_confirm(struct hostapd_data *hapd,
449 struct sta_info *sta)
450 {
451 struct wpabuf *buf;
452
453 buf = wpabuf_alloc(SAE_CONFIRM_MAX_LEN);
454 if (buf == NULL)
455 return NULL;
456
457 sae_write_confirm(sta->sae, buf);
458
459 return buf;
460 }
461
462
auth_sae_send_commit(struct hostapd_data * hapd,struct sta_info * sta,const u8 * bssid,int update)463 static int auth_sae_send_commit(struct hostapd_data *hapd,
464 struct sta_info *sta,
465 const u8 *bssid, int update)
466 {
467 struct wpabuf *data;
468 int reply_res;
469
470 data = auth_build_sae_commit(hapd, sta, update);
471 if (!data && sta->sae->tmp && sta->sae->tmp->pw_id)
472 return WLAN_STATUS_UNKNOWN_PASSWORD_IDENTIFIER;
473 if (data == NULL)
474 return WLAN_STATUS_UNSPECIFIED_FAILURE;
475
476 reply_res = send_auth_reply(hapd, sta->addr, bssid, WLAN_AUTH_SAE, 1,
477 WLAN_STATUS_SUCCESS, wpabuf_head(data),
478 wpabuf_len(data), "sae-send-commit");
479
480 wpabuf_free(data);
481
482 return reply_res;
483 }
484
485
auth_sae_send_confirm(struct hostapd_data * hapd,struct sta_info * sta,const u8 * bssid)486 static int auth_sae_send_confirm(struct hostapd_data *hapd,
487 struct sta_info *sta,
488 const u8 *bssid)
489 {
490 struct wpabuf *data;
491 int reply_res;
492
493 data = auth_build_sae_confirm(hapd, sta);
494 if (data == NULL)
495 return WLAN_STATUS_UNSPECIFIED_FAILURE;
496
497 reply_res = send_auth_reply(hapd, sta->addr, bssid, WLAN_AUTH_SAE, 2,
498 WLAN_STATUS_SUCCESS, wpabuf_head(data),
499 wpabuf_len(data), "sae-send-confirm");
500
501 wpabuf_free(data);
502
503 return reply_res;
504 }
505
506
use_sae_anti_clogging(struct hostapd_data * hapd)507 static int use_sae_anti_clogging(struct hostapd_data *hapd)
508 {
509 struct sta_info *sta;
510 unsigned int open = 0;
511
512 if (hapd->conf->sae_anti_clogging_threshold == 0)
513 return 1;
514
515 for (sta = hapd->sta_list; sta; sta = sta->next) {
516 if (!sta->sae)
517 continue;
518 if (sta->sae->state != SAE_COMMITTED &&
519 sta->sae->state != SAE_CONFIRMED)
520 continue;
521 open++;
522 if (open >= hapd->conf->sae_anti_clogging_threshold)
523 return 1;
524 }
525
526 /* In addition to already existing open SAE sessions, check whether
527 * there are enough pending commit messages in the processing queue to
528 * potentially result in too many open sessions. */
529 if (open + dl_list_len(&hapd->sae_commit_queue) >=
530 hapd->conf->sae_anti_clogging_threshold)
531 return 1;
532
533 return 0;
534 }
535
536
sae_token_hash(struct hostapd_data * hapd,const u8 * addr)537 static u8 sae_token_hash(struct hostapd_data *hapd, const u8 *addr)
538 {
539 u8 hash[SHA256_MAC_LEN];
540
541 hmac_sha256(hapd->sae_token_key, sizeof(hapd->sae_token_key),
542 addr, ETH_ALEN, hash);
543 return hash[0];
544 }
545
546
check_sae_token(struct hostapd_data * hapd,const u8 * addr,const u8 * token,size_t token_len)547 static int check_sae_token(struct hostapd_data *hapd, const u8 *addr,
548 const u8 *token, size_t token_len)
549 {
550 u8 mac[SHA256_MAC_LEN];
551 const u8 *addrs[2];
552 size_t len[2];
553 u16 token_idx;
554 u8 idx;
555
556 if (token_len != SHA256_MAC_LEN)
557 return -1;
558 idx = sae_token_hash(hapd, addr);
559 token_idx = hapd->sae_pending_token_idx[idx];
560 if (token_idx == 0 || token_idx != WPA_GET_BE16(token)) {
561 wpa_printf(MSG_DEBUG, "SAE: Invalid anti-clogging token from "
562 MACSTR " - token_idx 0x%04x, expected 0x%04x",
563 MAC2STR(addr), WPA_GET_BE16(token), token_idx);
564 return -1;
565 }
566
567 addrs[0] = addr;
568 len[0] = ETH_ALEN;
569 addrs[1] = token;
570 len[1] = 2;
571 if (hmac_sha256_vector(hapd->sae_token_key, sizeof(hapd->sae_token_key),
572 2, addrs, len, mac) < 0 ||
573 os_memcmp_const(token + 2, &mac[2], SHA256_MAC_LEN - 2) != 0)
574 return -1;
575
576 hapd->sae_pending_token_idx[idx] = 0; /* invalidate used token */
577
578 return 0;
579 }
580
581
auth_build_token_req(struct hostapd_data * hapd,int group,const u8 * addr)582 static struct wpabuf * auth_build_token_req(struct hostapd_data *hapd,
583 int group, const u8 *addr)
584 {
585 struct wpabuf *buf;
586 u8 *token;
587 struct os_reltime now;
588 u8 idx[2];
589 const u8 *addrs[2];
590 size_t len[2];
591 u8 p_idx;
592 u16 token_idx;
593
594 os_get_reltime(&now);
595 if (!os_reltime_initialized(&hapd->last_sae_token_key_update) ||
596 os_reltime_expired(&now, &hapd->last_sae_token_key_update, 60) ||
597 hapd->sae_token_idx == 0xffff) {
598 if (random_get_bytes(hapd->sae_token_key,
599 sizeof(hapd->sae_token_key)) < 0)
600 return NULL;
601 wpa_hexdump(MSG_DEBUG, "SAE: Updated token key",
602 hapd->sae_token_key, sizeof(hapd->sae_token_key));
603 hapd->last_sae_token_key_update = now;
604 hapd->sae_token_idx = 0;
605 os_memset(hapd->sae_pending_token_idx, 0,
606 sizeof(hapd->sae_pending_token_idx));
607 }
608
609 buf = wpabuf_alloc(sizeof(le16) + SHA256_MAC_LEN);
610 if (buf == NULL)
611 return NULL;
612
613 wpabuf_put_le16(buf, group); /* Finite Cyclic Group */
614
615 p_idx = sae_token_hash(hapd, addr);
616 token_idx = hapd->sae_pending_token_idx[p_idx];
617 if (!token_idx) {
618 hapd->sae_token_idx++;
619 token_idx = hapd->sae_token_idx;
620 hapd->sae_pending_token_idx[p_idx] = token_idx;
621 }
622 WPA_PUT_BE16(idx, token_idx);
623 token = wpabuf_put(buf, SHA256_MAC_LEN);
624 addrs[0] = addr;
625 len[0] = ETH_ALEN;
626 addrs[1] = idx;
627 len[1] = sizeof(idx);
628 if (hmac_sha256_vector(hapd->sae_token_key, sizeof(hapd->sae_token_key),
629 2, addrs, len, token) < 0) {
630 wpabuf_free(buf);
631 return NULL;
632 }
633 WPA_PUT_BE16(token, token_idx);
634
635 return buf;
636 }
637
638
sae_check_big_sync(struct hostapd_data * hapd,struct sta_info * sta)639 static int sae_check_big_sync(struct hostapd_data *hapd, struct sta_info *sta)
640 {
641 if (sta->sae->sync > hapd->conf->sae_sync) {
642 sae_set_state(sta, SAE_NOTHING, "Sync > dot11RSNASAESync");
643 sta->sae->sync = 0;
644 return -1;
645 }
646 return 0;
647 }
648
649
auth_sae_retransmit_timer(void * eloop_ctx,void * eloop_data)650 static void auth_sae_retransmit_timer(void *eloop_ctx, void *eloop_data)
651 {
652 struct hostapd_data *hapd = eloop_ctx;
653 struct sta_info *sta = eloop_data;
654 int ret;
655
656 if (sae_check_big_sync(hapd, sta))
657 return;
658 sta->sae->sync++;
659 wpa_printf(MSG_DEBUG, "SAE: Auth SAE retransmit timer for " MACSTR
660 " (sync=%d state=%s)",
661 MAC2STR(sta->addr), sta->sae->sync,
662 sae_state_txt(sta->sae->state));
663
664 switch (sta->sae->state) {
665 case SAE_COMMITTED:
666 ret = auth_sae_send_commit(hapd, sta, hapd->own_addr, 0);
667 eloop_register_timeout(0,
668 hapd->dot11RSNASAERetransPeriod * 1000,
669 auth_sae_retransmit_timer, hapd, sta);
670 break;
671 case SAE_CONFIRMED:
672 ret = auth_sae_send_confirm(hapd, sta, hapd->own_addr);
673 eloop_register_timeout(0,
674 hapd->dot11RSNASAERetransPeriod * 1000,
675 auth_sae_retransmit_timer, hapd, sta);
676 break;
677 default:
678 ret = -1;
679 break;
680 }
681
682 if (ret != WLAN_STATUS_SUCCESS)
683 wpa_printf(MSG_INFO, "SAE: Failed to retransmit: ret=%d", ret);
684 }
685
686
sae_clear_retransmit_timer(struct hostapd_data * hapd,struct sta_info * sta)687 void sae_clear_retransmit_timer(struct hostapd_data *hapd, struct sta_info *sta)
688 {
689 eloop_cancel_timeout(auth_sae_retransmit_timer, hapd, sta);
690 }
691
692
sae_set_retransmit_timer(struct hostapd_data * hapd,struct sta_info * sta)693 static void sae_set_retransmit_timer(struct hostapd_data *hapd,
694 struct sta_info *sta)
695 {
696 if (!(hapd->conf->mesh & MESH_ENABLED))
697 return;
698
699 eloop_cancel_timeout(auth_sae_retransmit_timer, hapd, sta);
700 eloop_register_timeout(0, hapd->dot11RSNASAERetransPeriod * 1000,
701 auth_sae_retransmit_timer, hapd, sta);
702 }
703
704
sae_sme_send_external_auth_status(struct hostapd_data * hapd,struct sta_info * sta,u16 status)705 static void sae_sme_send_external_auth_status(struct hostapd_data *hapd,
706 struct sta_info *sta, u16 status)
707 {
708 struct external_auth params;
709
710 os_memset(¶ms, 0, sizeof(params));
711 params.status = status;
712 params.bssid = sta->addr;
713 if (status == WLAN_STATUS_SUCCESS && sta->sae &&
714 !hapd->conf->disable_pmksa_caching)
715 params.pmkid = sta->sae->pmkid;
716
717 hostapd_drv_send_external_auth_status(hapd, ¶ms);
718 }
719
720
sae_accept_sta(struct hostapd_data * hapd,struct sta_info * sta)721 void sae_accept_sta(struct hostapd_data *hapd, struct sta_info *sta)
722 {
723 #ifndef CONFIG_NO_VLAN
724 struct vlan_description vlan_desc;
725
726 if (sta->sae->tmp && sta->sae->tmp->vlan_id > 0) {
727 wpa_printf(MSG_DEBUG, "SAE: Assign STA " MACSTR
728 " to VLAN ID %d",
729 MAC2STR(sta->addr), sta->sae->tmp->vlan_id);
730
731 os_memset(&vlan_desc, 0, sizeof(vlan_desc));
732 vlan_desc.notempty = 1;
733 vlan_desc.untagged = sta->sae->tmp->vlan_id;
734 if (!hostapd_vlan_valid(hapd->conf->vlan, &vlan_desc)) {
735 wpa_printf(MSG_INFO,
736 "Invalid VLAN ID %d in sae_password",
737 sta->sae->tmp->vlan_id);
738 return;
739 }
740
741 if (ap_sta_set_vlan(hapd, sta, &vlan_desc) < 0 ||
742 ap_sta_bind_vlan(hapd, sta) < 0) {
743 wpa_printf(MSG_INFO,
744 "Failed to assign VLAN ID %d from sae_password to "
745 MACSTR, sta->sae->tmp->vlan_id,
746 MAC2STR(sta->addr));
747 return;
748 }
749 }
750 #endif /* CONFIG_NO_VLAN */
751
752 sta->flags |= WLAN_STA_AUTH;
753 sta->auth_alg = WLAN_AUTH_SAE;
754 mlme_authenticate_indication(hapd, sta);
755 wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
756 sae_set_state(sta, SAE_ACCEPTED, "Accept Confirm");
757 wpa_auth_pmksa_add_sae(hapd->wpa_auth, sta->addr,
758 sta->sae->pmk, sta->sae->pmkid);
759 sae_sme_send_external_auth_status(hapd, sta, WLAN_STATUS_SUCCESS);
760 }
761
762
sae_sm_step(struct hostapd_data * hapd,struct sta_info * sta,const u8 * bssid,u8 auth_transaction,int allow_reuse,int * sta_removed)763 static int sae_sm_step(struct hostapd_data *hapd, struct sta_info *sta,
764 const u8 *bssid, u8 auth_transaction, int allow_reuse,
765 int *sta_removed)
766 {
767 int ret;
768
769 *sta_removed = 0;
770
771 if (auth_transaction != 1 && auth_transaction != 2)
772 return WLAN_STATUS_UNSPECIFIED_FAILURE;
773
774 wpa_printf(MSG_DEBUG, "SAE: Peer " MACSTR " state=%s auth_trans=%u",
775 MAC2STR(sta->addr), sae_state_txt(sta->sae->state),
776 auth_transaction);
777 switch (sta->sae->state) {
778 case SAE_NOTHING:
779 if (auth_transaction == 1) {
780 ret = auth_sae_send_commit(hapd, sta, bssid,
781 !allow_reuse);
782 if (ret)
783 return ret;
784 sae_set_state(sta, SAE_COMMITTED, "Sent Commit");
785
786 if (sae_process_commit(sta->sae) < 0)
787 return WLAN_STATUS_UNSPECIFIED_FAILURE;
788
789 /*
790 * In mesh case, both Commit and Confirm can be sent
791 * immediately. In infrastructure BSS, only a single
792 * Authentication frame (Commit) is expected from the AP
793 * here and the second one (Confirm) will be sent once
794 * the STA has sent its second Authentication frame
795 * (Confirm).
796 */
797 if (hapd->conf->mesh & MESH_ENABLED) {
798 /*
799 * Send both Commit and Confirm immediately
800 * based on SAE finite state machine
801 * Nothing -> Confirm transition.
802 */
803 ret = auth_sae_send_confirm(hapd, sta, bssid);
804 if (ret)
805 return ret;
806 sae_set_state(sta, SAE_CONFIRMED,
807 "Sent Confirm (mesh)");
808 } else {
809 /*
810 * For infrastructure BSS, send only the Commit
811 * message now to get alternating sequence of
812 * Authentication frames between the AP and STA.
813 * Confirm will be sent in
814 * Committed -> Confirmed/Accepted transition
815 * when receiving Confirm from STA.
816 */
817 }
818 sta->sae->sync = 0;
819 sae_set_retransmit_timer(hapd, sta);
820 } else {
821 hostapd_logger(hapd, sta->addr,
822 HOSTAPD_MODULE_IEEE80211,
823 HOSTAPD_LEVEL_DEBUG,
824 "SAE confirm before commit");
825 }
826 break;
827 case SAE_COMMITTED:
828 sae_clear_retransmit_timer(hapd, sta);
829 if (auth_transaction == 1) {
830 if (sae_process_commit(sta->sae) < 0)
831 return WLAN_STATUS_UNSPECIFIED_FAILURE;
832
833 ret = auth_sae_send_confirm(hapd, sta, bssid);
834 if (ret)
835 return ret;
836 sae_set_state(sta, SAE_CONFIRMED, "Sent Confirm");
837 sta->sae->sync = 0;
838 sae_set_retransmit_timer(hapd, sta);
839 } else if (hapd->conf->mesh & MESH_ENABLED) {
840 /*
841 * In mesh case, follow SAE finite state machine and
842 * send Commit now, if sync count allows.
843 */
844 if (sae_check_big_sync(hapd, sta))
845 return WLAN_STATUS_SUCCESS;
846 sta->sae->sync++;
847
848 ret = auth_sae_send_commit(hapd, sta, bssid, 0);
849 if (ret)
850 return ret;
851
852 sae_set_retransmit_timer(hapd, sta);
853 } else {
854 /*
855 * For instructure BSS, send the postponed Confirm from
856 * Nothing -> Confirmed transition that was reduced to
857 * Nothing -> Committed above.
858 */
859 ret = auth_sae_send_confirm(hapd, sta, bssid);
860 if (ret)
861 return ret;
862
863 sae_set_state(sta, SAE_CONFIRMED, "Sent Confirm");
864
865 /*
866 * Since this was triggered on Confirm RX, run another
867 * step to get to Accepted without waiting for
868 * additional events.
869 */
870 return sae_sm_step(hapd, sta, bssid, auth_transaction,
871 0, sta_removed);
872 }
873 break;
874 case SAE_CONFIRMED:
875 sae_clear_retransmit_timer(hapd, sta);
876 if (auth_transaction == 1) {
877 if (sae_check_big_sync(hapd, sta))
878 return WLAN_STATUS_SUCCESS;
879 sta->sae->sync++;
880
881 ret = auth_sae_send_commit(hapd, sta, bssid, 1);
882 if (ret)
883 return ret;
884
885 if (sae_process_commit(sta->sae) < 0)
886 return WLAN_STATUS_UNSPECIFIED_FAILURE;
887
888 ret = auth_sae_send_confirm(hapd, sta, bssid);
889 if (ret)
890 return ret;
891
892 sae_set_retransmit_timer(hapd, sta);
893 } else {
894 sta->sae->send_confirm = 0xffff;
895 sae_accept_sta(hapd, sta);
896 }
897 break;
898 case SAE_ACCEPTED:
899 if (auth_transaction == 1 &&
900 (hapd->conf->mesh & MESH_ENABLED)) {
901 wpa_printf(MSG_DEBUG, "SAE: remove the STA (" MACSTR
902 ") doing reauthentication",
903 MAC2STR(sta->addr));
904 wpa_auth_pmksa_remove(hapd->wpa_auth, sta->addr);
905 ap_free_sta(hapd, sta);
906 *sta_removed = 1;
907 } else if (auth_transaction == 1) {
908 wpa_printf(MSG_DEBUG, "SAE: Start reauthentication");
909 ret = auth_sae_send_commit(hapd, sta, bssid, 1);
910 if (ret)
911 return ret;
912 sae_set_state(sta, SAE_COMMITTED, "Sent Commit");
913
914 if (sae_process_commit(sta->sae) < 0)
915 return WLAN_STATUS_UNSPECIFIED_FAILURE;
916 sta->sae->sync = 0;
917 sae_set_retransmit_timer(hapd, sta);
918 } else {
919 if (sae_check_big_sync(hapd, sta))
920 return WLAN_STATUS_SUCCESS;
921 sta->sae->sync++;
922
923 ret = auth_sae_send_confirm(hapd, sta, bssid);
924 sae_clear_temp_data(sta->sae);
925 if (ret)
926 return ret;
927 }
928 break;
929 default:
930 wpa_printf(MSG_ERROR, "SAE: invalid state %d",
931 sta->sae->state);
932 return WLAN_STATUS_UNSPECIFIED_FAILURE;
933 }
934 return WLAN_STATUS_SUCCESS;
935 }
936
937
sae_pick_next_group(struct hostapd_data * hapd,struct sta_info * sta)938 static void sae_pick_next_group(struct hostapd_data *hapd, struct sta_info *sta)
939 {
940 struct sae_data *sae = sta->sae;
941 int i, *groups = hapd->conf->sae_groups;
942 int default_groups[] = { 19, 0 };
943
944 if (sae->state != SAE_COMMITTED)
945 return;
946
947 wpa_printf(MSG_DEBUG, "SAE: Previously selected group: %d", sae->group);
948
949 if (!groups)
950 groups = default_groups;
951 for (i = 0; groups[i] > 0; i++) {
952 if (sae->group == groups[i])
953 break;
954 }
955
956 if (groups[i] <= 0) {
957 wpa_printf(MSG_DEBUG,
958 "SAE: Previously selected group not found from the current configuration");
959 return;
960 }
961
962 for (;;) {
963 i++;
964 if (groups[i] <= 0) {
965 wpa_printf(MSG_DEBUG,
966 "SAE: No alternative group enabled");
967 return;
968 }
969
970 if (sae_set_group(sae, groups[i]) < 0)
971 continue;
972
973 break;
974 }
975 wpa_printf(MSG_DEBUG, "SAE: Selected new group: %d", groups[i]);
976 }
977
978
handle_auth_sae(struct hostapd_data * hapd,struct sta_info * sta,const struct ieee80211_mgmt * mgmt,size_t len,u16 auth_transaction,u16 status_code)979 static void handle_auth_sae(struct hostapd_data *hapd, struct sta_info *sta,
980 const struct ieee80211_mgmt *mgmt, size_t len,
981 u16 auth_transaction, u16 status_code)
982 {
983 int resp = WLAN_STATUS_SUCCESS;
984 struct wpabuf *data = NULL;
985 int *groups = hapd->conf->sae_groups;
986 int default_groups[] = { 19, 0 };
987 const u8 *pos, *end;
988 int sta_removed = 0;
989
990 if (!groups)
991 groups = default_groups;
992
993 #ifdef CONFIG_TESTING_OPTIONS
994 if (hapd->conf->sae_reflection_attack && auth_transaction == 1) {
995 wpa_printf(MSG_DEBUG, "SAE: TESTING - reflection attack");
996 pos = mgmt->u.auth.variable;
997 end = ((const u8 *) mgmt) + len;
998 send_auth_reply(hapd, mgmt->sa, mgmt->bssid, WLAN_AUTH_SAE,
999 auth_transaction, resp, pos, end - pos,
1000 "auth-sae-reflection-attack");
1001 goto remove_sta;
1002 }
1003
1004 if (hapd->conf->sae_commit_override && auth_transaction == 1) {
1005 wpa_printf(MSG_DEBUG, "SAE: TESTING - commit override");
1006 send_auth_reply(hapd, mgmt->sa, mgmt->bssid, WLAN_AUTH_SAE,
1007 auth_transaction, resp,
1008 wpabuf_head(hapd->conf->sae_commit_override),
1009 wpabuf_len(hapd->conf->sae_commit_override),
1010 "sae-commit-override");
1011 goto remove_sta;
1012 }
1013 #endif /* CONFIG_TESTING_OPTIONS */
1014 if (!sta->sae) {
1015 if (auth_transaction != 1 ||
1016 status_code != WLAN_STATUS_SUCCESS) {
1017 resp = -1;
1018 goto remove_sta;
1019 }
1020 sta->sae = os_zalloc(sizeof(*sta->sae));
1021 if (!sta->sae) {
1022 resp = -1;
1023 goto remove_sta;
1024 }
1025 sae_set_state(sta, SAE_NOTHING, "Init");
1026 sta->sae->sync = 0;
1027 }
1028
1029 if (sta->mesh_sae_pmksa_caching) {
1030 wpa_printf(MSG_DEBUG,
1031 "SAE: Cancel use of mesh PMKSA caching because peer starts SAE authentication");
1032 wpa_auth_pmksa_remove(hapd->wpa_auth, sta->addr);
1033 sta->mesh_sae_pmksa_caching = 0;
1034 }
1035
1036 if (auth_transaction == 1) {
1037 const u8 *token = NULL;
1038 size_t token_len = 0;
1039 int allow_reuse = 0;
1040
1041 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1042 HOSTAPD_LEVEL_DEBUG,
1043 "start SAE authentication (RX commit, status=%u (%s))",
1044 status_code, status2str(status_code));
1045
1046 if ((hapd->conf->mesh & MESH_ENABLED) &&
1047 status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ &&
1048 sta->sae->tmp) {
1049 pos = mgmt->u.auth.variable;
1050 end = ((const u8 *) mgmt) + len;
1051 if (pos + sizeof(le16) > end) {
1052 wpa_printf(MSG_ERROR,
1053 "SAE: Too short anti-clogging token request");
1054 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1055 goto reply;
1056 }
1057 resp = sae_group_allowed(sta->sae, groups,
1058 WPA_GET_LE16(pos));
1059 if (resp != WLAN_STATUS_SUCCESS) {
1060 wpa_printf(MSG_ERROR,
1061 "SAE: Invalid group in anti-clogging token request");
1062 goto reply;
1063 }
1064 pos += sizeof(le16);
1065
1066 wpabuf_free(sta->sae->tmp->anti_clogging_token);
1067 sta->sae->tmp->anti_clogging_token =
1068 wpabuf_alloc_copy(pos, end - pos);
1069 if (sta->sae->tmp->anti_clogging_token == NULL) {
1070 wpa_printf(MSG_ERROR,
1071 "SAE: Failed to alloc for anti-clogging token");
1072 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1073 goto remove_sta;
1074 }
1075
1076 /*
1077 * IEEE Std 802.11-2012, 11.3.8.6.4: If the Status code
1078 * is 76, a new Commit Message shall be constructed
1079 * with the Anti-Clogging Token from the received
1080 * Authentication frame, and the commit-scalar and
1081 * COMMIT-ELEMENT previously sent.
1082 */
1083 resp = auth_sae_send_commit(hapd, sta, mgmt->bssid, 0);
1084 if (resp != WLAN_STATUS_SUCCESS) {
1085 wpa_printf(MSG_ERROR,
1086 "SAE: Failed to send commit message");
1087 goto remove_sta;
1088 }
1089 sae_set_state(sta, SAE_COMMITTED,
1090 "Sent Commit (anti-clogging token case in mesh)");
1091 sta->sae->sync = 0;
1092 sae_set_retransmit_timer(hapd, sta);
1093 return;
1094 }
1095
1096 if ((hapd->conf->mesh & MESH_ENABLED) &&
1097 status_code ==
1098 WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED &&
1099 sta->sae->tmp) {
1100 wpa_printf(MSG_DEBUG,
1101 "SAE: Peer did not accept our SAE group");
1102 sae_pick_next_group(hapd, sta);
1103 goto remove_sta;
1104 }
1105
1106 if (status_code != WLAN_STATUS_SUCCESS)
1107 goto remove_sta;
1108
1109 if (!(hapd->conf->mesh & MESH_ENABLED) &&
1110 sta->sae->state == SAE_COMMITTED) {
1111 /* This is needed in the infrastructure BSS case to
1112 * address a sequence where a STA entry may remain in
1113 * hostapd across two attempts to do SAE authentication
1114 * by the same STA. The second attempt may end up trying
1115 * to use a different group and that would not be
1116 * allowed if we remain in Committed state with the
1117 * previously set parameters. */
1118 pos = mgmt->u.auth.variable;
1119 end = ((const u8 *) mgmt) + len;
1120 if (end - pos >= (int) sizeof(le16) &&
1121 sae_group_allowed(sta->sae, groups,
1122 WPA_GET_LE16(pos)) ==
1123 WLAN_STATUS_SUCCESS) {
1124 /* Do not waste resources deriving the same PWE
1125 * again since the same group is reused. */
1126 sae_set_state(sta, SAE_NOTHING,
1127 "Allow previous PWE to be reused");
1128 allow_reuse = 1;
1129 } else {
1130 sae_set_state(sta, SAE_NOTHING,
1131 "Clear existing state to allow restart");
1132 sae_clear_data(sta->sae);
1133 }
1134 }
1135
1136 resp = sae_parse_commit(sta->sae, mgmt->u.auth.variable,
1137 ((const u8 *) mgmt) + len -
1138 mgmt->u.auth.variable, &token,
1139 &token_len, groups);
1140 if (resp == SAE_SILENTLY_DISCARD) {
1141 wpa_printf(MSG_DEBUG,
1142 "SAE: Drop commit message from " MACSTR " due to reflection attack",
1143 MAC2STR(sta->addr));
1144 goto remove_sta;
1145 }
1146
1147 if (resp == WLAN_STATUS_UNKNOWN_PASSWORD_IDENTIFIER) {
1148 wpa_msg(hapd->msg_ctx, MSG_INFO,
1149 WPA_EVENT_SAE_UNKNOWN_PASSWORD_IDENTIFIER
1150 MACSTR, MAC2STR(sta->addr));
1151 sae_clear_retransmit_timer(hapd, sta);
1152 sae_set_state(sta, SAE_NOTHING,
1153 "Unknown Password Identifier");
1154 goto remove_sta;
1155 }
1156
1157 if (token && check_sae_token(hapd, sta->addr, token, token_len)
1158 < 0) {
1159 wpa_printf(MSG_DEBUG, "SAE: Drop commit message with "
1160 "incorrect token from " MACSTR,
1161 MAC2STR(sta->addr));
1162 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1163 goto remove_sta;
1164 }
1165
1166 if (resp != WLAN_STATUS_SUCCESS)
1167 goto reply;
1168
1169 if (!token && use_sae_anti_clogging(hapd) && !allow_reuse) {
1170 wpa_printf(MSG_DEBUG,
1171 "SAE: Request anti-clogging token from "
1172 MACSTR, MAC2STR(sta->addr));
1173 data = auth_build_token_req(hapd, sta->sae->group,
1174 sta->addr);
1175 resp = WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ;
1176 if (hapd->conf->mesh & MESH_ENABLED)
1177 sae_set_state(sta, SAE_NOTHING,
1178 "Request anti-clogging token case in mesh");
1179 goto reply;
1180 }
1181
1182 resp = sae_sm_step(hapd, sta, mgmt->bssid, auth_transaction,
1183 allow_reuse, &sta_removed);
1184 } else if (auth_transaction == 2) {
1185 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1186 HOSTAPD_LEVEL_DEBUG,
1187 "SAE authentication (RX confirm, status=%u (%s))",
1188 status_code, status2str(status_code));
1189 if (status_code != WLAN_STATUS_SUCCESS)
1190 goto remove_sta;
1191 if (sta->sae->state >= SAE_CONFIRMED ||
1192 !(hapd->conf->mesh & MESH_ENABLED)) {
1193 const u8 *var;
1194 size_t var_len;
1195 u16 peer_send_confirm;
1196
1197 var = mgmt->u.auth.variable;
1198 var_len = ((u8 *) mgmt) + len - mgmt->u.auth.variable;
1199 if (var_len < 2) {
1200 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1201 goto reply;
1202 }
1203
1204 peer_send_confirm = WPA_GET_LE16(var);
1205
1206 if (sta->sae->state == SAE_ACCEPTED &&
1207 (peer_send_confirm <= sta->sae->rc ||
1208 peer_send_confirm == 0xffff)) {
1209 wpa_printf(MSG_DEBUG,
1210 "SAE: Silently ignore unexpected Confirm from peer "
1211 MACSTR
1212 " (peer-send-confirm=%u Rc=%u)",
1213 MAC2STR(sta->addr),
1214 peer_send_confirm, sta->sae->rc);
1215 return;
1216 }
1217
1218 if (sae_check_confirm(sta->sae, var, var_len) < 0) {
1219 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1220 goto reply;
1221 }
1222 sta->sae->rc = peer_send_confirm;
1223 }
1224 resp = sae_sm_step(hapd, sta, mgmt->bssid, auth_transaction, 0,
1225 &sta_removed);
1226 } else {
1227 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1228 HOSTAPD_LEVEL_DEBUG,
1229 "unexpected SAE authentication transaction %u (status=%u (%s))",
1230 auth_transaction, status_code,
1231 status2str(status_code));
1232 if (status_code != WLAN_STATUS_SUCCESS)
1233 goto remove_sta;
1234 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
1235 }
1236
1237 reply:
1238 if (!sta_removed && resp != WLAN_STATUS_SUCCESS) {
1239 pos = mgmt->u.auth.variable;
1240 end = ((const u8 *) mgmt) + len;
1241
1242 /* Copy the Finite Cyclic Group field from the request if we
1243 * rejected it as unsupported group. */
1244 if (resp == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED &&
1245 !data && end - pos >= 2)
1246 data = wpabuf_alloc_copy(pos, 2);
1247
1248 sae_sme_send_external_auth_status(hapd, sta, resp);
1249 send_auth_reply(hapd, mgmt->sa, mgmt->bssid, WLAN_AUTH_SAE,
1250 auth_transaction, resp,
1251 data ? wpabuf_head(data) : (u8 *) "",
1252 data ? wpabuf_len(data) : 0, "auth-sae");
1253 }
1254
1255 remove_sta:
1256 if (!sta_removed && sta->added_unassoc &&
1257 (resp != WLAN_STATUS_SUCCESS ||
1258 status_code != WLAN_STATUS_SUCCESS)) {
1259 hostapd_drv_sta_remove(hapd, sta->addr);
1260 sta->added_unassoc = 0;
1261 }
1262 wpabuf_free(data);
1263 }
1264
1265
1266 /**
1267 * auth_sae_init_committed - Send COMMIT and start SAE in committed state
1268 * @hapd: BSS data for the device initiating the authentication
1269 * @sta: the peer to which commit authentication frame is sent
1270 *
1271 * This function implements Init event handling (IEEE Std 802.11-2012,
1272 * 11.3.8.6.3) in which initial COMMIT message is sent. Prior to calling, the
1273 * sta->sae structure should be initialized appropriately via a call to
1274 * sae_prepare_commit().
1275 */
auth_sae_init_committed(struct hostapd_data * hapd,struct sta_info * sta)1276 int auth_sae_init_committed(struct hostapd_data *hapd, struct sta_info *sta)
1277 {
1278 int ret;
1279
1280 if (!sta->sae || !sta->sae->tmp)
1281 return -1;
1282
1283 if (sta->sae->state != SAE_NOTHING)
1284 return -1;
1285
1286 ret = auth_sae_send_commit(hapd, sta, hapd->own_addr, 0);
1287 if (ret)
1288 return -1;
1289
1290 sae_set_state(sta, SAE_COMMITTED, "Init and sent commit");
1291 sta->sae->sync = 0;
1292 sae_set_retransmit_timer(hapd, sta);
1293
1294 return 0;
1295 }
1296
1297
auth_sae_process_commit(void * eloop_ctx,void * user_ctx)1298 void auth_sae_process_commit(void *eloop_ctx, void *user_ctx)
1299 {
1300 struct hostapd_data *hapd = eloop_ctx;
1301 struct hostapd_sae_commit_queue *q;
1302 unsigned int queue_len;
1303
1304 q = dl_list_first(&hapd->sae_commit_queue,
1305 struct hostapd_sae_commit_queue, list);
1306 if (!q)
1307 return;
1308 wpa_printf(MSG_DEBUG,
1309 "SAE: Process next available message from queue");
1310 dl_list_del(&q->list);
1311 handle_auth(hapd, (const struct ieee80211_mgmt *) q->msg, q->len,
1312 q->rssi, 1);
1313 os_free(q);
1314
1315 if (eloop_is_timeout_registered(auth_sae_process_commit, hapd, NULL))
1316 return;
1317 queue_len = dl_list_len(&hapd->sae_commit_queue);
1318 eloop_register_timeout(0, queue_len * 10000, auth_sae_process_commit,
1319 hapd, NULL);
1320 }
1321
1322
auth_sae_queue(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len,int rssi)1323 static void auth_sae_queue(struct hostapd_data *hapd,
1324 const struct ieee80211_mgmt *mgmt, size_t len,
1325 int rssi)
1326 {
1327 struct hostapd_sae_commit_queue *q, *q2;
1328 unsigned int queue_len;
1329 const struct ieee80211_mgmt *mgmt2;
1330
1331 queue_len = dl_list_len(&hapd->sae_commit_queue);
1332 if (queue_len >= 15) {
1333 wpa_printf(MSG_DEBUG,
1334 "SAE: No more room in message queue - drop the new frame from "
1335 MACSTR, MAC2STR(mgmt->sa));
1336 return;
1337 }
1338
1339 wpa_printf(MSG_DEBUG, "SAE: Queue Authentication message from "
1340 MACSTR " for processing (queue_len %u)", MAC2STR(mgmt->sa),
1341 queue_len);
1342 q = os_zalloc(sizeof(*q) + len);
1343 if (!q)
1344 return;
1345 q->rssi = rssi;
1346 q->len = len;
1347 os_memcpy(q->msg, mgmt, len);
1348
1349 /* Check whether there is already a queued Authentication frame from the
1350 * same station with the same transaction number and if so, replace that
1351 * queue entry with the new one. This avoids issues with a peer that
1352 * sends multiple times (e.g., due to frequent SAE retries). There is no
1353 * point in us trying to process the old attempts after a new one has
1354 * obsoleted them. */
1355 dl_list_for_each(q2, &hapd->sae_commit_queue,
1356 struct hostapd_sae_commit_queue, list) {
1357 mgmt2 = (const struct ieee80211_mgmt *) q2->msg;
1358 if (os_memcmp(mgmt->sa, mgmt2->sa, ETH_ALEN) == 0 &&
1359 mgmt->u.auth.auth_transaction ==
1360 mgmt2->u.auth.auth_transaction) {
1361 wpa_printf(MSG_DEBUG,
1362 "SAE: Replace queued message from same STA with same transaction number");
1363 dl_list_add(&q2->list, &q->list);
1364 dl_list_del(&q2->list);
1365 os_free(q2);
1366 goto queued;
1367 }
1368 }
1369
1370 /* No pending identical entry, so add to the end of the queue */
1371 dl_list_add_tail(&hapd->sae_commit_queue, &q->list);
1372
1373 queued:
1374 if (eloop_is_timeout_registered(auth_sae_process_commit, hapd, NULL))
1375 return;
1376 eloop_register_timeout(0, queue_len * 10000, auth_sae_process_commit,
1377 hapd, NULL);
1378 }
1379
1380
auth_sae_queued_addr(struct hostapd_data * hapd,const u8 * addr)1381 static int auth_sae_queued_addr(struct hostapd_data *hapd, const u8 *addr)
1382 {
1383 struct hostapd_sae_commit_queue *q;
1384 const struct ieee80211_mgmt *mgmt;
1385
1386 dl_list_for_each(q, &hapd->sae_commit_queue,
1387 struct hostapd_sae_commit_queue, list) {
1388 mgmt = (const struct ieee80211_mgmt *) q->msg;
1389 if (os_memcmp(addr, mgmt->sa, ETH_ALEN) == 0)
1390 return 1;
1391 }
1392
1393 return 0;
1394 }
1395
1396 #endif /* CONFIG_SAE */
1397
1398
wpa_res_to_status_code(int res)1399 static u16 wpa_res_to_status_code(int res)
1400 {
1401 if (res == WPA_INVALID_GROUP)
1402 return WLAN_STATUS_GROUP_CIPHER_NOT_VALID;
1403 if (res == WPA_INVALID_PAIRWISE)
1404 return WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID;
1405 if (res == WPA_INVALID_AKMP)
1406 return WLAN_STATUS_AKMP_NOT_VALID;
1407 if (res == WPA_ALLOC_FAIL)
1408 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1409 #ifdef CONFIG_IEEE80211W
1410 if (res == WPA_MGMT_FRAME_PROTECTION_VIOLATION)
1411 return WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION;
1412 if (res == WPA_INVALID_MGMT_GROUP_CIPHER)
1413 return WLAN_STATUS_CIPHER_REJECTED_PER_POLICY;
1414 #endif /* CONFIG_IEEE80211W */
1415 if (res == WPA_INVALID_MDIE)
1416 return WLAN_STATUS_INVALID_MDIE;
1417 if (res == WPA_INVALID_PMKID)
1418 return WLAN_STATUS_INVALID_PMKID;
1419 if (res != WPA_IE_OK)
1420 return WLAN_STATUS_INVALID_IE;
1421 return WLAN_STATUS_SUCCESS;
1422 }
1423
1424
1425 #ifdef CONFIG_FILS
1426
1427 static void handle_auth_fils_finish(struct hostapd_data *hapd,
1428 struct sta_info *sta, u16 resp,
1429 struct wpabuf *data, int pub);
1430
handle_auth_fils(struct hostapd_data * hapd,struct sta_info * sta,const u8 * pos,size_t len,u16 auth_alg,u16 auth_transaction,u16 status_code,void (* cb)(struct hostapd_data * hapd,struct sta_info * sta,u16 resp,struct wpabuf * data,int pub))1431 void handle_auth_fils(struct hostapd_data *hapd, struct sta_info *sta,
1432 const u8 *pos, size_t len, u16 auth_alg,
1433 u16 auth_transaction, u16 status_code,
1434 void (*cb)(struct hostapd_data *hapd,
1435 struct sta_info *sta, u16 resp,
1436 struct wpabuf *data, int pub))
1437 {
1438 u16 resp = WLAN_STATUS_SUCCESS;
1439 const u8 *end;
1440 struct ieee802_11_elems elems;
1441 int res;
1442 struct wpa_ie_data rsn;
1443 struct rsn_pmksa_cache_entry *pmksa = NULL;
1444
1445 if (auth_transaction != 1 || status_code != WLAN_STATUS_SUCCESS)
1446 return;
1447
1448 end = pos + len;
1449
1450 wpa_hexdump(MSG_DEBUG, "FILS: Authentication frame fields",
1451 pos, end - pos);
1452
1453 /* TODO: FILS PK */
1454 #ifdef CONFIG_FILS_SK_PFS
1455 if (auth_alg == WLAN_AUTH_FILS_SK_PFS) {
1456 u16 group;
1457 struct wpabuf *pub;
1458 size_t elem_len;
1459
1460 /* Using FILS PFS */
1461
1462 /* Finite Cyclic Group */
1463 if (end - pos < 2) {
1464 wpa_printf(MSG_DEBUG,
1465 "FILS: No room for Finite Cyclic Group");
1466 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1467 goto fail;
1468 }
1469 group = WPA_GET_LE16(pos);
1470 pos += 2;
1471 if (group != hapd->conf->fils_dh_group) {
1472 wpa_printf(MSG_DEBUG,
1473 "FILS: Unsupported Finite Cyclic Group: %u (expected %u)",
1474 group, hapd->conf->fils_dh_group);
1475 resp = WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED;
1476 goto fail;
1477 }
1478
1479 crypto_ecdh_deinit(sta->fils_ecdh);
1480 sta->fils_ecdh = crypto_ecdh_init(group);
1481 if (!sta->fils_ecdh) {
1482 wpa_printf(MSG_INFO,
1483 "FILS: Could not initialize ECDH with group %d",
1484 group);
1485 resp = WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED;
1486 goto fail;
1487 }
1488
1489 pub = crypto_ecdh_get_pubkey(sta->fils_ecdh, 1);
1490 if (!pub) {
1491 wpa_printf(MSG_DEBUG,
1492 "FILS: Failed to derive ECDH public key");
1493 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1494 goto fail;
1495 }
1496 elem_len = wpabuf_len(pub);
1497 wpabuf_free(pub);
1498
1499 /* Element */
1500 if ((size_t) (end - pos) < elem_len) {
1501 wpa_printf(MSG_DEBUG, "FILS: No room for Element");
1502 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1503 goto fail;
1504 }
1505
1506 wpabuf_free(sta->fils_g_sta);
1507 sta->fils_g_sta = wpabuf_alloc_copy(pos, elem_len);
1508 wpabuf_clear_free(sta->fils_dh_ss);
1509 sta->fils_dh_ss = crypto_ecdh_set_peerkey(sta->fils_ecdh, 1,
1510 pos, elem_len);
1511 if (!sta->fils_dh_ss) {
1512 wpa_printf(MSG_DEBUG, "FILS: ECDH operation failed");
1513 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1514 goto fail;
1515 }
1516 wpa_hexdump_buf_key(MSG_DEBUG, "FILS: DH_SS", sta->fils_dh_ss);
1517 pos += elem_len;
1518 } else {
1519 crypto_ecdh_deinit(sta->fils_ecdh);
1520 sta->fils_ecdh = NULL;
1521 wpabuf_clear_free(sta->fils_dh_ss);
1522 sta->fils_dh_ss = NULL;
1523 }
1524 #endif /* CONFIG_FILS_SK_PFS */
1525
1526 wpa_hexdump(MSG_DEBUG, "FILS: Remaining IEs", pos, end - pos);
1527 if (ieee802_11_parse_elems(pos, end - pos, &elems, 1) == ParseFailed) {
1528 wpa_printf(MSG_DEBUG, "FILS: Could not parse elements");
1529 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1530 goto fail;
1531 }
1532
1533 /* RSNE */
1534 wpa_hexdump(MSG_DEBUG, "FILS: RSN element",
1535 elems.rsn_ie, elems.rsn_ie_len);
1536 if (!elems.rsn_ie ||
1537 wpa_parse_wpa_ie_rsn(elems.rsn_ie - 2, elems.rsn_ie_len + 2,
1538 &rsn) < 0) {
1539 wpa_printf(MSG_DEBUG, "FILS: No valid RSN element");
1540 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1541 goto fail;
1542 }
1543
1544 if (!sta->wpa_sm)
1545 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth, sta->addr,
1546 NULL);
1547 if (!sta->wpa_sm) {
1548 wpa_printf(MSG_DEBUG,
1549 "FILS: Failed to initialize RSN state machine");
1550 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1551 goto fail;
1552 }
1553
1554 res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm,
1555 hapd->iface->freq,
1556 elems.rsn_ie - 2, elems.rsn_ie_len + 2,
1557 elems.mdie, elems.mdie_len, NULL, 0);
1558 resp = wpa_res_to_status_code(res);
1559 if (resp != WLAN_STATUS_SUCCESS)
1560 goto fail;
1561
1562 if (!elems.fils_nonce) {
1563 wpa_printf(MSG_DEBUG, "FILS: No FILS Nonce field");
1564 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1565 goto fail;
1566 }
1567 wpa_hexdump(MSG_DEBUG, "FILS: SNonce", elems.fils_nonce,
1568 FILS_NONCE_LEN);
1569 os_memcpy(sta->fils_snonce, elems.fils_nonce, FILS_NONCE_LEN);
1570
1571 /* PMKID List */
1572 if (rsn.pmkid && rsn.num_pmkid > 0) {
1573 u8 num;
1574 const u8 *pmkid;
1575
1576 wpa_hexdump(MSG_DEBUG, "FILS: PMKID List",
1577 rsn.pmkid, rsn.num_pmkid * PMKID_LEN);
1578
1579 pmkid = rsn.pmkid;
1580 num = rsn.num_pmkid;
1581 while (num) {
1582 wpa_hexdump(MSG_DEBUG, "FILS: PMKID", pmkid, PMKID_LEN);
1583 pmksa = wpa_auth_pmksa_get(hapd->wpa_auth, sta->addr,
1584 pmkid);
1585 if (pmksa)
1586 break;
1587 pmksa = wpa_auth_pmksa_get_fils_cache_id(hapd->wpa_auth,
1588 sta->addr,
1589 pmkid);
1590 if (pmksa)
1591 break;
1592 pmkid += PMKID_LEN;
1593 num--;
1594 }
1595 }
1596 if (pmksa && wpa_auth_sta_key_mgmt(sta->wpa_sm) != pmksa->akmp) {
1597 wpa_printf(MSG_DEBUG,
1598 "FILS: Matching PMKSA cache entry has different AKMP (0x%x != 0x%x) - ignore",
1599 wpa_auth_sta_key_mgmt(sta->wpa_sm), pmksa->akmp);
1600 pmksa = NULL;
1601 }
1602 if (pmksa)
1603 wpa_printf(MSG_DEBUG, "FILS: Found matching PMKSA cache entry");
1604
1605 /* FILS Session */
1606 if (!elems.fils_session) {
1607 wpa_printf(MSG_DEBUG, "FILS: No FILS Session element");
1608 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1609 goto fail;
1610 }
1611 wpa_hexdump(MSG_DEBUG, "FILS: FILS Session", elems.fils_session,
1612 FILS_SESSION_LEN);
1613 os_memcpy(sta->fils_session, elems.fils_session, FILS_SESSION_LEN);
1614
1615 /* FILS Wrapped Data */
1616 if (elems.fils_wrapped_data) {
1617 wpa_hexdump(MSG_DEBUG, "FILS: Wrapped Data",
1618 elems.fils_wrapped_data,
1619 elems.fils_wrapped_data_len);
1620 if (!pmksa) {
1621 #ifndef CONFIG_NO_RADIUS
1622 if (!sta->eapol_sm) {
1623 sta->eapol_sm =
1624 ieee802_1x_alloc_eapol_sm(hapd, sta);
1625 }
1626 wpa_printf(MSG_DEBUG,
1627 "FILS: Forward EAP-Initiate/Re-auth to authentication server");
1628 ieee802_1x_encapsulate_radius(
1629 hapd, sta, elems.fils_wrapped_data,
1630 elems.fils_wrapped_data_len);
1631 sta->fils_pending_cb = cb;
1632 wpa_printf(MSG_DEBUG,
1633 "FILS: Will send Authentication frame once the response from authentication server is available");
1634 sta->flags |= WLAN_STA_PENDING_FILS_ERP;
1635 /* Calculate pending PMKID here so that we do not need
1636 * to maintain a copy of the EAP-Initiate/Reauth
1637 * message. */
1638 if (fils_pmkid_erp(wpa_auth_sta_key_mgmt(sta->wpa_sm),
1639 elems.fils_wrapped_data,
1640 elems.fils_wrapped_data_len,
1641 sta->fils_erp_pmkid) == 0)
1642 sta->fils_erp_pmkid_set = 1;
1643 return;
1644 #else /* CONFIG_NO_RADIUS */
1645 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1646 goto fail;
1647 #endif /* CONFIG_NO_RADIUS */
1648 }
1649 }
1650
1651 fail:
1652 if (cb) {
1653 struct wpabuf *data;
1654 int pub = 0;
1655
1656 data = prepare_auth_resp_fils(hapd, sta, &resp, pmksa, NULL,
1657 NULL, 0, &pub);
1658 if (!data) {
1659 wpa_printf(MSG_DEBUG,
1660 "%s: prepare_auth_resp_fils() returned failure",
1661 __func__);
1662 }
1663
1664 cb(hapd, sta, resp, data, pub);
1665 }
1666 }
1667
1668
1669 static struct wpabuf *
prepare_auth_resp_fils(struct hostapd_data * hapd,struct sta_info * sta,u16 * resp,struct rsn_pmksa_cache_entry * pmksa,struct wpabuf * erp_resp,const u8 * msk,size_t msk_len,int * is_pub)1670 prepare_auth_resp_fils(struct hostapd_data *hapd,
1671 struct sta_info *sta, u16 *resp,
1672 struct rsn_pmksa_cache_entry *pmksa,
1673 struct wpabuf *erp_resp,
1674 const u8 *msk, size_t msk_len,
1675 int *is_pub)
1676 {
1677 u8 fils_nonce[FILS_NONCE_LEN];
1678 size_t ielen;
1679 struct wpabuf *data = NULL;
1680 const u8 *ie;
1681 u8 *ie_buf = NULL;
1682 const u8 *pmk = NULL;
1683 size_t pmk_len = 0;
1684 u8 pmk_buf[PMK_LEN_MAX];
1685 struct wpabuf *pub = NULL;
1686
1687 if (*resp != WLAN_STATUS_SUCCESS)
1688 goto fail;
1689
1690 ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &ielen);
1691 if (!ie) {
1692 *resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1693 goto fail;
1694 }
1695
1696 if (pmksa) {
1697 /* Add PMKID of the selected PMKSA into RSNE */
1698 ie_buf = os_malloc(ielen + 2 + 2 + PMKID_LEN);
1699 if (!ie_buf) {
1700 *resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1701 goto fail;
1702 }
1703
1704 os_memcpy(ie_buf, ie, ielen);
1705 if (wpa_insert_pmkid(ie_buf, &ielen, pmksa->pmkid) < 0) {
1706 *resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1707 goto fail;
1708 }
1709 ie = ie_buf;
1710 }
1711
1712 if (random_get_bytes(fils_nonce, FILS_NONCE_LEN) < 0) {
1713 *resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1714 goto fail;
1715 }
1716 wpa_hexdump(MSG_DEBUG, "RSN: Generated FILS Nonce",
1717 fils_nonce, FILS_NONCE_LEN);
1718
1719 #ifdef CONFIG_FILS_SK_PFS
1720 if (sta->fils_dh_ss && sta->fils_ecdh) {
1721 pub = crypto_ecdh_get_pubkey(sta->fils_ecdh, 1);
1722 if (!pub) {
1723 *resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1724 goto fail;
1725 }
1726 }
1727 #endif /* CONFIG_FILS_SK_PFS */
1728
1729 data = wpabuf_alloc(1000 + ielen + (pub ? wpabuf_len(pub) : 0));
1730 if (!data) {
1731 *resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1732 goto fail;
1733 }
1734
1735 /* TODO: FILS PK */
1736 #ifdef CONFIG_FILS_SK_PFS
1737 if (pub) {
1738 /* Finite Cyclic Group */
1739 wpabuf_put_le16(data, hapd->conf->fils_dh_group);
1740
1741 /* Element */
1742 wpabuf_put_buf(data, pub);
1743 }
1744 #endif /* CONFIG_FILS_SK_PFS */
1745
1746 /* RSNE */
1747 wpabuf_put_data(data, ie, ielen);
1748
1749 /* MDE when using FILS+FT (already included in ie,ielen with RSNE) */
1750
1751 #ifdef CONFIG_IEEE80211R_AP
1752 if (wpa_key_mgmt_ft(wpa_auth_sta_key_mgmt(sta->wpa_sm))) {
1753 /* FTE[R1KH-ID,R0KH-ID] when using FILS+FT */
1754 int res;
1755 int use_sha384 = wpa_key_mgmt_sha384(
1756 wpa_auth_sta_key_mgmt(sta->wpa_sm));
1757
1758 res = wpa_auth_write_fte(hapd->wpa_auth, use_sha384,
1759 wpabuf_put(data, 0),
1760 wpabuf_tailroom(data));
1761 if (res < 0) {
1762 *resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1763 goto fail;
1764 }
1765 wpabuf_put(data, res);
1766 }
1767 #endif /* CONFIG_IEEE80211R_AP */
1768
1769 /* FILS Nonce */
1770 wpabuf_put_u8(data, WLAN_EID_EXTENSION); /* Element ID */
1771 wpabuf_put_u8(data, 1 + FILS_NONCE_LEN); /* Length */
1772 /* Element ID Extension */
1773 wpabuf_put_u8(data, WLAN_EID_EXT_FILS_NONCE);
1774 wpabuf_put_data(data, fils_nonce, FILS_NONCE_LEN);
1775
1776 /* FILS Session */
1777 wpabuf_put_u8(data, WLAN_EID_EXTENSION); /* Element ID */
1778 wpabuf_put_u8(data, 1 + FILS_SESSION_LEN); /* Length */
1779 /* Element ID Extension */
1780 wpabuf_put_u8(data, WLAN_EID_EXT_FILS_SESSION);
1781 wpabuf_put_data(data, sta->fils_session, FILS_SESSION_LEN);
1782
1783 /* FILS Wrapped Data */
1784 if (!pmksa && erp_resp) {
1785 wpabuf_put_u8(data, WLAN_EID_EXTENSION); /* Element ID */
1786 wpabuf_put_u8(data, 1 + wpabuf_len(erp_resp)); /* Length */
1787 /* Element ID Extension */
1788 wpabuf_put_u8(data, WLAN_EID_EXT_FILS_WRAPPED_DATA);
1789 wpabuf_put_buf(data, erp_resp);
1790
1791 if (fils_rmsk_to_pmk(wpa_auth_sta_key_mgmt(sta->wpa_sm),
1792 msk, msk_len, sta->fils_snonce, fils_nonce,
1793 sta->fils_dh_ss ?
1794 wpabuf_head(sta->fils_dh_ss) : NULL,
1795 sta->fils_dh_ss ?
1796 wpabuf_len(sta->fils_dh_ss) : 0,
1797 pmk_buf, &pmk_len)) {
1798 wpa_printf(MSG_DEBUG, "FILS: Failed to derive PMK");
1799 *resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1800 wpabuf_free(data);
1801 data = NULL;
1802 goto fail;
1803 }
1804 pmk = pmk_buf;
1805
1806 /* Don't use DHss in PTK derivation if PMKSA caching is not
1807 * used. */
1808 wpabuf_clear_free(sta->fils_dh_ss);
1809 sta->fils_dh_ss = NULL;
1810
1811 if (sta->fils_erp_pmkid_set) {
1812 /* TODO: get PMKLifetime from WPA parameters */
1813 unsigned int dot11RSNAConfigPMKLifetime = 43200;
1814 int session_timeout;
1815
1816 session_timeout = dot11RSNAConfigPMKLifetime;
1817 if (sta->session_timeout_set) {
1818 struct os_reltime now, diff;
1819
1820 os_get_reltime(&now);
1821 os_reltime_sub(&sta->session_timeout, &now,
1822 &diff);
1823 session_timeout = diff.sec;
1824 }
1825
1826 sta->fils_erp_pmkid_set = 0;
1827 wpa_auth_add_fils_pmk_pmkid(sta->wpa_sm, pmk, pmk_len,
1828 sta->fils_erp_pmkid);
1829 if (!hapd->conf->disable_pmksa_caching &&
1830 wpa_auth_pmksa_add2(
1831 hapd->wpa_auth, sta->addr,
1832 pmk, pmk_len,
1833 sta->fils_erp_pmkid,
1834 session_timeout,
1835 wpa_auth_sta_key_mgmt(sta->wpa_sm)) < 0) {
1836 wpa_printf(MSG_ERROR,
1837 "FILS: Failed to add PMKSA cache entry based on ERP");
1838 }
1839 }
1840 } else if (pmksa) {
1841 pmk = pmksa->pmk;
1842 pmk_len = pmksa->pmk_len;
1843 }
1844
1845 if (!pmk) {
1846 wpa_printf(MSG_DEBUG, "FILS: No PMK available");
1847 *resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1848 wpabuf_free(data);
1849 data = NULL;
1850 goto fail;
1851 }
1852
1853 if (fils_auth_pmk_to_ptk(sta->wpa_sm, pmk, pmk_len,
1854 sta->fils_snonce, fils_nonce,
1855 sta->fils_dh_ss ?
1856 wpabuf_head(sta->fils_dh_ss) : NULL,
1857 sta->fils_dh_ss ?
1858 wpabuf_len(sta->fils_dh_ss) : 0,
1859 sta->fils_g_sta, pub) < 0) {
1860 *resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1861 wpabuf_free(data);
1862 data = NULL;
1863 goto fail;
1864 }
1865
1866 fail:
1867 if (is_pub)
1868 *is_pub = pub != NULL;
1869 os_free(ie_buf);
1870 wpabuf_free(pub);
1871 wpabuf_clear_free(sta->fils_dh_ss);
1872 sta->fils_dh_ss = NULL;
1873 #ifdef CONFIG_FILS_SK_PFS
1874 crypto_ecdh_deinit(sta->fils_ecdh);
1875 sta->fils_ecdh = NULL;
1876 #endif /* CONFIG_FILS_SK_PFS */
1877 return data;
1878 }
1879
1880
handle_auth_fils_finish(struct hostapd_data * hapd,struct sta_info * sta,u16 resp,struct wpabuf * data,int pub)1881 static void handle_auth_fils_finish(struct hostapd_data *hapd,
1882 struct sta_info *sta, u16 resp,
1883 struct wpabuf *data, int pub)
1884 {
1885 u16 auth_alg;
1886
1887 auth_alg = (pub ||
1888 resp == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED) ?
1889 WLAN_AUTH_FILS_SK_PFS : WLAN_AUTH_FILS_SK;
1890 send_auth_reply(hapd, sta->addr, hapd->own_addr, auth_alg, 2, resp,
1891 data ? wpabuf_head(data) : (u8 *) "",
1892 data ? wpabuf_len(data) : 0, "auth-fils-finish");
1893 wpabuf_free(data);
1894
1895 if (resp == WLAN_STATUS_SUCCESS) {
1896 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1897 HOSTAPD_LEVEL_DEBUG,
1898 "authentication OK (FILS)");
1899 sta->flags |= WLAN_STA_AUTH;
1900 wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
1901 sta->auth_alg = pub ? WLAN_AUTH_FILS_SK_PFS : WLAN_AUTH_FILS_SK;
1902 mlme_authenticate_indication(hapd, sta);
1903 }
1904 }
1905
1906
ieee802_11_finish_fils_auth(struct hostapd_data * hapd,struct sta_info * sta,int success,struct wpabuf * erp_resp,const u8 * msk,size_t msk_len)1907 void ieee802_11_finish_fils_auth(struct hostapd_data *hapd,
1908 struct sta_info *sta, int success,
1909 struct wpabuf *erp_resp,
1910 const u8 *msk, size_t msk_len)
1911 {
1912 struct wpabuf *data;
1913 int pub = 0;
1914 u16 resp;
1915
1916 sta->flags &= ~WLAN_STA_PENDING_FILS_ERP;
1917
1918 if (!sta->fils_pending_cb)
1919 return;
1920 resp = success ? WLAN_STATUS_SUCCESS : WLAN_STATUS_UNSPECIFIED_FAILURE;
1921 data = prepare_auth_resp_fils(hapd, sta, &resp, NULL, erp_resp,
1922 msk, msk_len, &pub);
1923 if (!data) {
1924 wpa_printf(MSG_DEBUG,
1925 "%s: prepare_auth_resp_fils() returned failure",
1926 __func__);
1927 }
1928 sta->fils_pending_cb(hapd, sta, resp, data, pub);
1929 }
1930
1931 #endif /* CONFIG_FILS */
1932
1933
1934 int
ieee802_11_allowed_address(struct hostapd_data * hapd,const u8 * addr,const u8 * msg,size_t len,u32 * session_timeout,u32 * acct_interim_interval,struct vlan_description * vlan_id,struct hostapd_sta_wpa_psk_short ** psk,char ** identity,char ** radius_cui,int is_probe_req)1935 ieee802_11_allowed_address(struct hostapd_data *hapd, const u8 *addr,
1936 const u8 *msg, size_t len, u32 *session_timeout,
1937 u32 *acct_interim_interval,
1938 struct vlan_description *vlan_id,
1939 struct hostapd_sta_wpa_psk_short **psk,
1940 char **identity, char **radius_cui, int is_probe_req)
1941 {
1942 int res;
1943
1944 os_memset(vlan_id, 0, sizeof(*vlan_id));
1945 res = hostapd_allowed_address(hapd, addr, msg, len,
1946 session_timeout, acct_interim_interval,
1947 vlan_id, psk, identity, radius_cui,
1948 is_probe_req);
1949
1950 if (res == HOSTAPD_ACL_REJECT) {
1951 if (!is_probe_req)
1952 wpa_printf(MSG_DEBUG,
1953 "Station " MACSTR
1954 " not allowed to authenticate",
1955 MAC2STR(addr));
1956 return HOSTAPD_ACL_REJECT;
1957 }
1958
1959 if (res == HOSTAPD_ACL_PENDING) {
1960 wpa_printf(MSG_DEBUG, "Authentication frame from " MACSTR
1961 " waiting for an external authentication",
1962 MAC2STR(addr));
1963 /* Authentication code will re-send the authentication frame
1964 * after it has received (and cached) information from the
1965 * external source. */
1966 return HOSTAPD_ACL_PENDING;
1967 }
1968
1969 return res;
1970 }
1971
1972
1973 static int
ieee802_11_set_radius_info(struct hostapd_data * hapd,struct sta_info * sta,int res,u32 session_timeout,u32 acct_interim_interval,struct vlan_description * vlan_id,struct hostapd_sta_wpa_psk_short ** psk,char ** identity,char ** radius_cui)1974 ieee802_11_set_radius_info(struct hostapd_data *hapd, struct sta_info *sta,
1975 int res, u32 session_timeout,
1976 u32 acct_interim_interval,
1977 struct vlan_description *vlan_id,
1978 struct hostapd_sta_wpa_psk_short **psk,
1979 char **identity, char **radius_cui)
1980 {
1981 if (vlan_id->notempty &&
1982 !hostapd_vlan_valid(hapd->conf->vlan, vlan_id)) {
1983 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
1984 HOSTAPD_LEVEL_INFO,
1985 "Invalid VLAN %d%s received from RADIUS server",
1986 vlan_id->untagged,
1987 vlan_id->tagged[0] ? "+" : "");
1988 return -1;
1989 }
1990 if (ap_sta_set_vlan(hapd, sta, vlan_id) < 0)
1991 return -1;
1992 if (sta->vlan_id)
1993 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
1994 HOSTAPD_LEVEL_INFO, "VLAN ID %d", sta->vlan_id);
1995
1996 hostapd_free_psk_list(sta->psk);
1997 if (hapd->conf->wpa_psk_radius != PSK_RADIUS_IGNORED) {
1998 sta->psk = *psk;
1999 *psk = NULL;
2000 } else {
2001 sta->psk = NULL;
2002 }
2003
2004 os_free(sta->identity);
2005 sta->identity = *identity;
2006 *identity = NULL;
2007
2008 os_free(sta->radius_cui);
2009 sta->radius_cui = *radius_cui;
2010 *radius_cui = NULL;
2011
2012 if (hapd->conf->acct_interim_interval == 0 && acct_interim_interval)
2013 sta->acct_interim_interval = acct_interim_interval;
2014 if (res == HOSTAPD_ACL_ACCEPT_TIMEOUT) {
2015 sta->session_timeout_set = 1;
2016 os_get_reltime(&sta->session_timeout);
2017 sta->session_timeout.sec += session_timeout;
2018 ap_sta_session_timeout(hapd, sta, session_timeout);
2019 } else {
2020 sta->session_timeout_set = 0;
2021 ap_sta_no_session_timeout(hapd, sta);
2022 }
2023
2024 return 0;
2025 }
2026
2027
handle_auth(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len,int rssi,int from_queue)2028 static void handle_auth(struct hostapd_data *hapd,
2029 const struct ieee80211_mgmt *mgmt, size_t len,
2030 int rssi, int from_queue)
2031 {
2032 u16 auth_alg, auth_transaction, status_code;
2033 u16 resp = WLAN_STATUS_SUCCESS;
2034 struct sta_info *sta = NULL;
2035 int res, reply_res;
2036 u16 fc;
2037 const u8 *challenge = NULL;
2038 u32 session_timeout, acct_interim_interval;
2039 struct vlan_description vlan_id;
2040 struct hostapd_sta_wpa_psk_short *psk = NULL;
2041 u8 resp_ies[2 + WLAN_AUTH_CHALLENGE_LEN];
2042 size_t resp_ies_len = 0;
2043 char *identity = NULL;
2044 char *radius_cui = NULL;
2045 u16 seq_ctrl;
2046
2047 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) {
2048 wpa_printf(MSG_INFO, "handle_auth - too short payload (len=%lu)",
2049 (unsigned long) len);
2050 return;
2051 }
2052
2053 #ifdef CONFIG_TESTING_OPTIONS
2054 if (hapd->iconf->ignore_auth_probability > 0.0 &&
2055 drand48() < hapd->iconf->ignore_auth_probability) {
2056 wpa_printf(MSG_INFO,
2057 "TESTING: ignoring auth frame from " MACSTR,
2058 MAC2STR(mgmt->sa));
2059 return;
2060 }
2061 #endif /* CONFIG_TESTING_OPTIONS */
2062
2063 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2064 auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction);
2065 status_code = le_to_host16(mgmt->u.auth.status_code);
2066 fc = le_to_host16(mgmt->frame_control);
2067 seq_ctrl = le_to_host16(mgmt->seq_ctrl);
2068
2069 if (len >= IEEE80211_HDRLEN + sizeof(mgmt->u.auth) +
2070 2 + WLAN_AUTH_CHALLENGE_LEN &&
2071 mgmt->u.auth.variable[0] == WLAN_EID_CHALLENGE &&
2072 mgmt->u.auth.variable[1] == WLAN_AUTH_CHALLENGE_LEN)
2073 challenge = &mgmt->u.auth.variable[2];
2074
2075 wpa_printf(MSG_DEBUG, "authentication: STA=" MACSTR " auth_alg=%d "
2076 "auth_transaction=%d status_code=%d wep=%d%s "
2077 "seq_ctrl=0x%x%s%s",
2078 MAC2STR(mgmt->sa), auth_alg, auth_transaction,
2079 status_code, !!(fc & WLAN_FC_ISWEP),
2080 challenge ? " challenge" : "",
2081 seq_ctrl, (fc & WLAN_FC_RETRY) ? " retry" : "",
2082 from_queue ? " (from queue)" : "");
2083
2084 #ifdef CONFIG_NO_RC4
2085 if (auth_alg == WLAN_AUTH_SHARED_KEY) {
2086 wpa_printf(MSG_INFO,
2087 "Unsupported authentication algorithm (%d)",
2088 auth_alg);
2089 resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
2090 goto fail;
2091 }
2092 #endif /* CONFIG_NO_RC4 */
2093
2094 if (hapd->tkip_countermeasures) {
2095 wpa_printf(MSG_DEBUG,
2096 "Ongoing TKIP countermeasures (Michael MIC failure) - reject authentication");
2097 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
2098 goto fail;
2099 }
2100
2101 if (!(((hapd->conf->auth_algs & WPA_AUTH_ALG_OPEN) &&
2102 auth_alg == WLAN_AUTH_OPEN) ||
2103 #ifdef CONFIG_IEEE80211R_AP
2104 (hapd->conf->wpa && wpa_key_mgmt_ft(hapd->conf->wpa_key_mgmt) &&
2105 auth_alg == WLAN_AUTH_FT) ||
2106 #endif /* CONFIG_IEEE80211R_AP */
2107 #ifdef CONFIG_SAE
2108 (hapd->conf->wpa && wpa_key_mgmt_sae(hapd->conf->wpa_key_mgmt) &&
2109 auth_alg == WLAN_AUTH_SAE) ||
2110 #endif /* CONFIG_SAE */
2111 #ifdef CONFIG_FILS
2112 (hapd->conf->wpa && wpa_key_mgmt_fils(hapd->conf->wpa_key_mgmt) &&
2113 auth_alg == WLAN_AUTH_FILS_SK) ||
2114 (hapd->conf->wpa && wpa_key_mgmt_fils(hapd->conf->wpa_key_mgmt) &&
2115 hapd->conf->fils_dh_group &&
2116 auth_alg == WLAN_AUTH_FILS_SK_PFS) ||
2117 #endif /* CONFIG_FILS */
2118 ((hapd->conf->auth_algs & WPA_AUTH_ALG_SHARED) &&
2119 auth_alg == WLAN_AUTH_SHARED_KEY))) {
2120 wpa_printf(MSG_INFO, "Unsupported authentication algorithm (%d)",
2121 auth_alg);
2122 resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
2123 goto fail;
2124 }
2125
2126 if (!(auth_transaction == 1 || auth_alg == WLAN_AUTH_SAE ||
2127 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 3))) {
2128 wpa_printf(MSG_INFO, "Unknown authentication transaction number (%d)",
2129 auth_transaction);
2130 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
2131 goto fail;
2132 }
2133
2134 if (os_memcmp(mgmt->sa, hapd->own_addr, ETH_ALEN) == 0) {
2135 wpa_printf(MSG_INFO, "Station " MACSTR " not allowed to authenticate",
2136 MAC2STR(mgmt->sa));
2137 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
2138 goto fail;
2139 }
2140
2141 if (hapd->conf->no_auth_if_seen_on) {
2142 struct hostapd_data *other;
2143
2144 other = sta_track_seen_on(hapd->iface, mgmt->sa,
2145 hapd->conf->no_auth_if_seen_on);
2146 if (other) {
2147 u8 *pos;
2148 u32 info;
2149 u8 op_class, channel, phytype;
2150
2151 wpa_printf(MSG_DEBUG, "%s: Reject authentication from "
2152 MACSTR " since STA has been seen on %s",
2153 hapd->conf->iface, MAC2STR(mgmt->sa),
2154 hapd->conf->no_auth_if_seen_on);
2155
2156 resp = WLAN_STATUS_REJECTED_WITH_SUGGESTED_BSS_TRANSITION;
2157 pos = &resp_ies[0];
2158 *pos++ = WLAN_EID_NEIGHBOR_REPORT;
2159 *pos++ = 13;
2160 os_memcpy(pos, other->own_addr, ETH_ALEN);
2161 pos += ETH_ALEN;
2162 info = 0; /* TODO: BSSID Information */
2163 WPA_PUT_LE32(pos, info);
2164 pos += 4;
2165 if (other->iconf->hw_mode == HOSTAPD_MODE_IEEE80211AD)
2166 phytype = 8; /* dmg */
2167 else if (other->iconf->ieee80211ac)
2168 phytype = 9; /* vht */
2169 else if (other->iconf->ieee80211n)
2170 phytype = 7; /* ht */
2171 else if (other->iconf->hw_mode ==
2172 HOSTAPD_MODE_IEEE80211A)
2173 phytype = 4; /* ofdm */
2174 else if (other->iconf->hw_mode ==
2175 HOSTAPD_MODE_IEEE80211G)
2176 phytype = 6; /* erp */
2177 else
2178 phytype = 5; /* hrdsss */
2179 if (ieee80211_freq_to_channel_ext(
2180 hostapd_hw_get_freq(other,
2181 other->iconf->channel),
2182 other->iconf->secondary_channel,
2183 other->iconf->ieee80211ac,
2184 &op_class, &channel) == NUM_HOSTAPD_MODES) {
2185 op_class = 0;
2186 channel = other->iconf->channel;
2187 }
2188 *pos++ = op_class;
2189 *pos++ = channel;
2190 *pos++ = phytype;
2191 resp_ies_len = pos - &resp_ies[0];
2192 goto fail;
2193 }
2194 }
2195
2196 res = ieee802_11_allowed_address(
2197 hapd, mgmt->sa, (const u8 *) mgmt, len, &session_timeout,
2198 &acct_interim_interval, &vlan_id, &psk, &identity, &radius_cui,
2199 0);
2200 if (res == HOSTAPD_ACL_REJECT) {
2201 wpa_msg(hapd->msg_ctx, MSG_DEBUG,
2202 "Ignore Authentication frame from " MACSTR
2203 " due to ACL reject", MAC2STR(mgmt->sa));
2204 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
2205 goto fail;
2206 }
2207 if (res == HOSTAPD_ACL_PENDING)
2208 return;
2209
2210 #ifdef CONFIG_SAE
2211 if (auth_alg == WLAN_AUTH_SAE && !from_queue &&
2212 (auth_transaction == 1 ||
2213 (auth_transaction == 2 && auth_sae_queued_addr(hapd, mgmt->sa)))) {
2214 /* Handle SAE Authentication commit message through a queue to
2215 * provide more control for postponing the needed heavy
2216 * processing under a possible DoS attack scenario. In addition,
2217 * queue SAE Authentication confirm message if there happens to
2218 * be a queued commit message from the same peer. This is needed
2219 * to avoid reordering Authentication frames within the same
2220 * SAE exchange. */
2221 auth_sae_queue(hapd, mgmt, len, rssi);
2222 return;
2223 }
2224 #endif /* CONFIG_SAE */
2225
2226 sta = ap_get_sta(hapd, mgmt->sa);
2227 if (sta) {
2228 sta->flags &= ~WLAN_STA_PENDING_FILS_ERP;
2229 sta->ft_over_ds = 0;
2230 if ((fc & WLAN_FC_RETRY) &&
2231 sta->last_seq_ctrl != WLAN_INVALID_MGMT_SEQ &&
2232 sta->last_seq_ctrl == seq_ctrl &&
2233 sta->last_subtype == WLAN_FC_STYPE_AUTH) {
2234 hostapd_logger(hapd, sta->addr,
2235 HOSTAPD_MODULE_IEEE80211,
2236 HOSTAPD_LEVEL_DEBUG,
2237 "Drop repeated authentication frame seq_ctrl=0x%x",
2238 seq_ctrl);
2239 return;
2240 }
2241 #ifdef CONFIG_MESH
2242 if ((hapd->conf->mesh & MESH_ENABLED) &&
2243 sta->plink_state == PLINK_BLOCKED) {
2244 wpa_printf(MSG_DEBUG, "Mesh peer " MACSTR
2245 " is blocked - drop Authentication frame",
2246 MAC2STR(mgmt->sa));
2247 return;
2248 }
2249 #endif /* CONFIG_MESH */
2250 } else {
2251 #ifdef CONFIG_MESH
2252 if (hapd->conf->mesh & MESH_ENABLED) {
2253 /* if the mesh peer is not available, we don't do auth.
2254 */
2255 wpa_printf(MSG_DEBUG, "Mesh peer " MACSTR
2256 " not yet known - drop Authentication frame",
2257 MAC2STR(mgmt->sa));
2258 /*
2259 * Save a copy of the frame so that it can be processed
2260 * if a new peer entry is added shortly after this.
2261 */
2262 wpabuf_free(hapd->mesh_pending_auth);
2263 hapd->mesh_pending_auth = wpabuf_alloc_copy(mgmt, len);
2264 os_get_reltime(&hapd->mesh_pending_auth_time);
2265 return;
2266 }
2267 #endif /* CONFIG_MESH */
2268
2269 sta = ap_sta_add(hapd, mgmt->sa);
2270 if (!sta) {
2271 wpa_printf(MSG_DEBUG, "ap_sta_add() failed");
2272 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
2273 goto fail;
2274 }
2275 }
2276 sta->last_seq_ctrl = seq_ctrl;
2277 sta->last_subtype = WLAN_FC_STYPE_AUTH;
2278 #ifdef CONFIG_MBO
2279 sta->auth_rssi = rssi;
2280 #endif /* CONFIG_MBO */
2281
2282 res = ieee802_11_set_radius_info(
2283 hapd, sta, res, session_timeout, acct_interim_interval,
2284 &vlan_id, &psk, &identity, &radius_cui);
2285 if (res) {
2286 wpa_printf(MSG_DEBUG, "ieee802_11_set_radius_info() failed");
2287 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
2288 goto fail;
2289 }
2290
2291 sta->flags &= ~WLAN_STA_PREAUTH;
2292 ieee802_1x_notify_pre_auth(sta->eapol_sm, 0);
2293
2294 /*
2295 * If the driver supports full AP client state, add a station to the
2296 * driver before sending authentication reply to make sure the driver
2297 * has resources, and not to go through the entire authentication and
2298 * association handshake, and fail it at the end.
2299 *
2300 * If this is not the first transaction, in a multi-step authentication
2301 * algorithm, the station already exists in the driver
2302 * (sta->added_unassoc = 1) so skip it.
2303 *
2304 * In mesh mode, the station was already added to the driver when the
2305 * NEW_PEER_CANDIDATE event is received.
2306 *
2307 * If PMF was negotiated for the existing association, skip this to
2308 * avoid dropping the STA entry and the associated keys. This is needed
2309 * to allow the original connection work until the attempt can complete
2310 * (re)association, so that unprotected Authentication frame cannot be
2311 * used to bypass PMF protection.
2312 */
2313 if (FULL_AP_CLIENT_STATE_SUPP(hapd->iface->drv_flags) &&
2314 (!(sta->flags & WLAN_STA_MFP) || !ap_sta_is_authorized(sta)) &&
2315 !(hapd->conf->mesh & MESH_ENABLED) &&
2316 !(sta->added_unassoc)) {
2317 /*
2318 * If a station that is already associated to the AP, is trying
2319 * to authenticate again, remove the STA entry, in order to make
2320 * sure the STA PS state gets cleared and configuration gets
2321 * updated. To handle this, station's added_unassoc flag is
2322 * cleared once the station has completed association.
2323 */
2324 ap_sta_set_authorized(hapd, sta, 0);
2325 hostapd_drv_sta_remove(hapd, sta->addr);
2326 sta->flags &= ~(WLAN_STA_ASSOC | WLAN_STA_AUTH |
2327 WLAN_STA_AUTHORIZED);
2328
2329 if (hostapd_sta_add(hapd, sta->addr, 0, 0,
2330 sta->supported_rates,
2331 sta->supported_rates_len,
2332 0, NULL, NULL, NULL, 0,
2333 sta->flags, 0, 0, 0, 0)) {
2334 hostapd_logger(hapd, sta->addr,
2335 HOSTAPD_MODULE_IEEE80211,
2336 HOSTAPD_LEVEL_NOTICE,
2337 "Could not add STA to kernel driver");
2338 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
2339 goto fail;
2340 }
2341
2342 sta->added_unassoc = 1;
2343 }
2344
2345 switch (auth_alg) {
2346 case WLAN_AUTH_OPEN:
2347 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
2348 HOSTAPD_LEVEL_DEBUG,
2349 "authentication OK (open system)");
2350 sta->flags |= WLAN_STA_AUTH;
2351 wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
2352 sta->auth_alg = WLAN_AUTH_OPEN;
2353 mlme_authenticate_indication(hapd, sta);
2354 break;
2355 #ifndef CONFIG_NO_RC4
2356 case WLAN_AUTH_SHARED_KEY:
2357 resp = auth_shared_key(hapd, sta, auth_transaction, challenge,
2358 fc & WLAN_FC_ISWEP);
2359 if (resp != 0)
2360 wpa_printf(MSG_DEBUG,
2361 "auth_shared_key() failed: status=%d", resp);
2362 sta->auth_alg = WLAN_AUTH_SHARED_KEY;
2363 mlme_authenticate_indication(hapd, sta);
2364 if (sta->challenge && auth_transaction == 1) {
2365 resp_ies[0] = WLAN_EID_CHALLENGE;
2366 resp_ies[1] = WLAN_AUTH_CHALLENGE_LEN;
2367 os_memcpy(resp_ies + 2, sta->challenge,
2368 WLAN_AUTH_CHALLENGE_LEN);
2369 resp_ies_len = 2 + WLAN_AUTH_CHALLENGE_LEN;
2370 }
2371 break;
2372 #endif /* CONFIG_NO_RC4 */
2373 #ifdef CONFIG_IEEE80211R_AP
2374 case WLAN_AUTH_FT:
2375 sta->auth_alg = WLAN_AUTH_FT;
2376 if (sta->wpa_sm == NULL)
2377 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
2378 sta->addr, NULL);
2379 if (sta->wpa_sm == NULL) {
2380 wpa_printf(MSG_DEBUG, "FT: Failed to initialize WPA "
2381 "state machine");
2382 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
2383 goto fail;
2384 }
2385 wpa_ft_process_auth(sta->wpa_sm, mgmt->bssid,
2386 auth_transaction, mgmt->u.auth.variable,
2387 len - IEEE80211_HDRLEN -
2388 sizeof(mgmt->u.auth),
2389 handle_auth_ft_finish, hapd);
2390 /* handle_auth_ft_finish() callback will complete auth. */
2391 return;
2392 #endif /* CONFIG_IEEE80211R_AP */
2393 #ifdef CONFIG_SAE
2394 case WLAN_AUTH_SAE:
2395 #ifdef CONFIG_MESH
2396 if (status_code == WLAN_STATUS_SUCCESS &&
2397 hapd->conf->mesh & MESH_ENABLED) {
2398 if (sta->wpa_sm == NULL)
2399 sta->wpa_sm =
2400 wpa_auth_sta_init(hapd->wpa_auth,
2401 sta->addr, NULL);
2402 if (sta->wpa_sm == NULL) {
2403 wpa_printf(MSG_DEBUG,
2404 "SAE: Failed to initialize WPA state machine");
2405 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
2406 goto fail;
2407 }
2408 }
2409 #endif /* CONFIG_MESH */
2410 handle_auth_sae(hapd, sta, mgmt, len, auth_transaction,
2411 status_code);
2412 return;
2413 #endif /* CONFIG_SAE */
2414 #ifdef CONFIG_FILS
2415 case WLAN_AUTH_FILS_SK:
2416 case WLAN_AUTH_FILS_SK_PFS:
2417 handle_auth_fils(hapd, sta, mgmt->u.auth.variable,
2418 len - IEEE80211_HDRLEN - sizeof(mgmt->u.auth),
2419 auth_alg, auth_transaction, status_code,
2420 handle_auth_fils_finish);
2421 return;
2422 #endif /* CONFIG_FILS */
2423 }
2424
2425 fail:
2426 os_free(identity);
2427 os_free(radius_cui);
2428 hostapd_free_psk_list(psk);
2429
2430 reply_res = send_auth_reply(hapd, mgmt->sa, mgmt->bssid, auth_alg,
2431 auth_transaction + 1, resp, resp_ies,
2432 resp_ies_len, "handle-auth");
2433
2434 if (sta && sta->added_unassoc && (resp != WLAN_STATUS_SUCCESS ||
2435 reply_res != WLAN_STATUS_SUCCESS)) {
2436 hostapd_drv_sta_remove(hapd, sta->addr);
2437 sta->added_unassoc = 0;
2438 }
2439 }
2440
2441
hostapd_get_aid(struct hostapd_data * hapd,struct sta_info * sta)2442 int hostapd_get_aid(struct hostapd_data *hapd, struct sta_info *sta)
2443 {
2444 int i, j = 32, aid;
2445
2446 /* get a unique AID */
2447 if (sta->aid > 0) {
2448 wpa_printf(MSG_DEBUG, " old AID %d", sta->aid);
2449 return 0;
2450 }
2451
2452 if (TEST_FAIL())
2453 return -1;
2454
2455 for (i = 0; i < AID_WORDS; i++) {
2456 if (hapd->sta_aid[i] == (u32) -1)
2457 continue;
2458 for (j = 0; j < 32; j++) {
2459 if (!(hapd->sta_aid[i] & BIT(j)))
2460 break;
2461 }
2462 if (j < 32)
2463 break;
2464 }
2465 if (j == 32)
2466 return -1;
2467 aid = i * 32 + j + 1;
2468 if (aid > 2007)
2469 return -1;
2470
2471 sta->aid = aid;
2472 hapd->sta_aid[i] |= BIT(j);
2473 wpa_printf(MSG_DEBUG, " new AID %d", sta->aid);
2474 return 0;
2475 }
2476
2477
check_ssid(struct hostapd_data * hapd,struct sta_info * sta,const u8 * ssid_ie,size_t ssid_ie_len)2478 static u16 check_ssid(struct hostapd_data *hapd, struct sta_info *sta,
2479 const u8 *ssid_ie, size_t ssid_ie_len)
2480 {
2481 if (ssid_ie == NULL)
2482 return WLAN_STATUS_UNSPECIFIED_FAILURE;
2483
2484 if (ssid_ie_len != hapd->conf->ssid.ssid_len ||
2485 os_memcmp(ssid_ie, hapd->conf->ssid.ssid, ssid_ie_len) != 0) {
2486 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
2487 HOSTAPD_LEVEL_INFO,
2488 "Station tried to associate with unknown SSID "
2489 "'%s'", wpa_ssid_txt(ssid_ie, ssid_ie_len));
2490 return WLAN_STATUS_UNSPECIFIED_FAILURE;
2491 }
2492
2493 return WLAN_STATUS_SUCCESS;
2494 }
2495
2496
check_wmm(struct hostapd_data * hapd,struct sta_info * sta,const u8 * wmm_ie,size_t wmm_ie_len)2497 static u16 check_wmm(struct hostapd_data *hapd, struct sta_info *sta,
2498 const u8 *wmm_ie, size_t wmm_ie_len)
2499 {
2500 sta->flags &= ~WLAN_STA_WMM;
2501 sta->qosinfo = 0;
2502 if (wmm_ie && hapd->conf->wmm_enabled) {
2503 struct wmm_information_element *wmm;
2504
2505 if (!hostapd_eid_wmm_valid(hapd, wmm_ie, wmm_ie_len)) {
2506 hostapd_logger(hapd, sta->addr,
2507 HOSTAPD_MODULE_WPA,
2508 HOSTAPD_LEVEL_DEBUG,
2509 "invalid WMM element in association "
2510 "request");
2511 return WLAN_STATUS_UNSPECIFIED_FAILURE;
2512 }
2513
2514 sta->flags |= WLAN_STA_WMM;
2515 wmm = (struct wmm_information_element *) wmm_ie;
2516 sta->qosinfo = wmm->qos_info;
2517 }
2518 return WLAN_STATUS_SUCCESS;
2519 }
2520
check_multi_ap(struct hostapd_data * hapd,struct sta_info * sta,const u8 * multi_ap_ie,size_t multi_ap_len)2521 static u16 check_multi_ap(struct hostapd_data *hapd, struct sta_info *sta,
2522 const u8 *multi_ap_ie, size_t multi_ap_len)
2523 {
2524 u8 multi_ap_value = 0;
2525
2526 sta->flags &= ~WLAN_STA_MULTI_AP;
2527
2528 if (!hapd->conf->multi_ap)
2529 return WLAN_STATUS_SUCCESS;
2530
2531 if (multi_ap_ie) {
2532 const u8 *multi_ap_subelem;
2533
2534 multi_ap_subelem = get_ie(multi_ap_ie + 4,
2535 multi_ap_len - 4,
2536 MULTI_AP_SUB_ELEM_TYPE);
2537 if (multi_ap_subelem && multi_ap_subelem[1] == 1) {
2538 multi_ap_value = multi_ap_subelem[2];
2539 } else {
2540 hostapd_logger(hapd, sta->addr,
2541 HOSTAPD_MODULE_IEEE80211,
2542 HOSTAPD_LEVEL_INFO,
2543 "Multi-AP IE has missing or invalid Multi-AP subelement");
2544 return WLAN_STATUS_INVALID_IE;
2545 }
2546 }
2547
2548 if (multi_ap_value && multi_ap_value != MULTI_AP_BACKHAUL_STA)
2549 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
2550 HOSTAPD_LEVEL_INFO,
2551 "Multi-AP IE with unexpected value 0x%02x",
2552 multi_ap_value);
2553
2554 if (!(multi_ap_value & MULTI_AP_BACKHAUL_STA)) {
2555 if (hapd->conf->multi_ap & FRONTHAUL_BSS)
2556 return WLAN_STATUS_SUCCESS;
2557
2558 hostapd_logger(hapd, sta->addr,
2559 HOSTAPD_MODULE_IEEE80211,
2560 HOSTAPD_LEVEL_INFO,
2561 "Non-Multi-AP STA tries to associate with backhaul-only BSS");
2562 return WLAN_STATUS_ASSOC_DENIED_UNSPEC;
2563 }
2564
2565 if (!(hapd->conf->multi_ap & BACKHAUL_BSS))
2566 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
2567 HOSTAPD_LEVEL_DEBUG,
2568 "Backhaul STA tries to associate with fronthaul-only BSS");
2569
2570 sta->flags |= WLAN_STA_MULTI_AP;
2571 return WLAN_STATUS_SUCCESS;
2572 }
2573
2574
copy_supp_rates(struct hostapd_data * hapd,struct sta_info * sta,struct ieee802_11_elems * elems)2575 static u16 copy_supp_rates(struct hostapd_data *hapd, struct sta_info *sta,
2576 struct ieee802_11_elems *elems)
2577 {
2578 /* Supported rates not used in IEEE 802.11ad/DMG */
2579 if (hapd->iface->current_mode &&
2580 hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211AD)
2581 return WLAN_STATUS_SUCCESS;
2582
2583 if (!elems->supp_rates) {
2584 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
2585 HOSTAPD_LEVEL_DEBUG,
2586 "No supported rates element in AssocReq");
2587 return WLAN_STATUS_UNSPECIFIED_FAILURE;
2588 }
2589
2590 if (elems->supp_rates_len + elems->ext_supp_rates_len >
2591 sizeof(sta->supported_rates)) {
2592 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
2593 HOSTAPD_LEVEL_DEBUG,
2594 "Invalid supported rates element length %d+%d",
2595 elems->supp_rates_len,
2596 elems->ext_supp_rates_len);
2597 return WLAN_STATUS_UNSPECIFIED_FAILURE;
2598 }
2599
2600 sta->supported_rates_len = merge_byte_arrays(
2601 sta->supported_rates, sizeof(sta->supported_rates),
2602 elems->supp_rates, elems->supp_rates_len,
2603 elems->ext_supp_rates, elems->ext_supp_rates_len);
2604
2605 return WLAN_STATUS_SUCCESS;
2606 }
2607
2608
check_ext_capab(struct hostapd_data * hapd,struct sta_info * sta,const u8 * ext_capab_ie,size_t ext_capab_ie_len)2609 static u16 check_ext_capab(struct hostapd_data *hapd, struct sta_info *sta,
2610 const u8 *ext_capab_ie, size_t ext_capab_ie_len)
2611 {
2612 #ifdef CONFIG_INTERWORKING
2613 /* check for QoS Map support */
2614 if (ext_capab_ie_len >= 5) {
2615 if (ext_capab_ie[4] & 0x01)
2616 sta->qos_map_enabled = 1;
2617 }
2618 #endif /* CONFIG_INTERWORKING */
2619
2620 if (ext_capab_ie_len > 0) {
2621 sta->ecsa_supported = !!(ext_capab_ie[0] & BIT(2));
2622 os_free(sta->ext_capability);
2623 sta->ext_capability = os_malloc(1 + ext_capab_ie_len);
2624 if (sta->ext_capability) {
2625 sta->ext_capability[0] = ext_capab_ie_len;
2626 os_memcpy(sta->ext_capability + 1, ext_capab_ie,
2627 ext_capab_ie_len);
2628 }
2629 }
2630
2631 return WLAN_STATUS_SUCCESS;
2632 }
2633
2634
2635 #ifdef CONFIG_OWE
2636
owe_group_supported(struct hostapd_data * hapd,u16 group)2637 static int owe_group_supported(struct hostapd_data *hapd, u16 group)
2638 {
2639 int i;
2640 int *groups = hapd->conf->owe_groups;
2641
2642 if (group != 19 && group != 20 && group != 21)
2643 return 0;
2644
2645 if (!groups)
2646 return 1;
2647
2648 for (i = 0; groups[i] > 0; i++) {
2649 if (groups[i] == group)
2650 return 1;
2651 }
2652
2653 return 0;
2654 }
2655
2656
owe_process_assoc_req(struct hostapd_data * hapd,struct sta_info * sta,const u8 * owe_dh,u8 owe_dh_len)2657 static u16 owe_process_assoc_req(struct hostapd_data *hapd,
2658 struct sta_info *sta, const u8 *owe_dh,
2659 u8 owe_dh_len)
2660 {
2661 struct wpabuf *secret, *pub, *hkey;
2662 int res;
2663 u8 prk[SHA512_MAC_LEN], pmkid[SHA512_MAC_LEN];
2664 const char *info = "OWE Key Generation";
2665 const u8 *addr[2];
2666 size_t len[2];
2667 u16 group;
2668 size_t hash_len, prime_len;
2669
2670 if (wpa_auth_sta_get_pmksa(sta->wpa_sm)) {
2671 wpa_printf(MSG_DEBUG, "OWE: Using PMKSA caching");
2672 return WLAN_STATUS_SUCCESS;
2673 }
2674
2675 group = WPA_GET_LE16(owe_dh);
2676 if (!owe_group_supported(hapd, group)) {
2677 wpa_printf(MSG_DEBUG, "OWE: Unsupported DH group %u", group);
2678 return WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED;
2679 }
2680 if (group == 19)
2681 prime_len = 32;
2682 else if (group == 20)
2683 prime_len = 48;
2684 else if (group == 21)
2685 prime_len = 66;
2686 else
2687 return WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED;
2688
2689 crypto_ecdh_deinit(sta->owe_ecdh);
2690 sta->owe_ecdh = crypto_ecdh_init(group);
2691 if (!sta->owe_ecdh)
2692 return WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED;
2693 sta->owe_group = group;
2694
2695 secret = crypto_ecdh_set_peerkey(sta->owe_ecdh, 0, owe_dh + 2,
2696 owe_dh_len - 2);
2697 secret = wpabuf_zeropad(secret, prime_len);
2698 if (!secret) {
2699 wpa_printf(MSG_DEBUG, "OWE: Invalid peer DH public key");
2700 return WLAN_STATUS_UNSPECIFIED_FAILURE;
2701 }
2702 wpa_hexdump_buf_key(MSG_DEBUG, "OWE: DH shared secret", secret);
2703
2704 /* prk = HKDF-extract(C | A | group, z) */
2705
2706 pub = crypto_ecdh_get_pubkey(sta->owe_ecdh, 0);
2707 if (!pub) {
2708 wpabuf_clear_free(secret);
2709 return WLAN_STATUS_UNSPECIFIED_FAILURE;
2710 }
2711
2712 /* PMKID = Truncate-128(Hash(C | A)) */
2713 addr[0] = owe_dh + 2;
2714 len[0] = owe_dh_len - 2;
2715 addr[1] = wpabuf_head(pub);
2716 len[1] = wpabuf_len(pub);
2717 if (group == 19) {
2718 res = sha256_vector(2, addr, len, pmkid);
2719 hash_len = SHA256_MAC_LEN;
2720 } else if (group == 20) {
2721 res = sha384_vector(2, addr, len, pmkid);
2722 hash_len = SHA384_MAC_LEN;
2723 } else if (group == 21) {
2724 res = sha512_vector(2, addr, len, pmkid);
2725 hash_len = SHA512_MAC_LEN;
2726 } else {
2727 wpabuf_free(pub);
2728 wpabuf_clear_free(secret);
2729 return WLAN_STATUS_UNSPECIFIED_FAILURE;
2730 }
2731 pub = wpabuf_zeropad(pub, prime_len);
2732 if (res < 0 || !pub) {
2733 wpabuf_free(pub);
2734 wpabuf_clear_free(secret);
2735 return WLAN_STATUS_UNSPECIFIED_FAILURE;
2736 }
2737
2738 hkey = wpabuf_alloc(owe_dh_len - 2 + wpabuf_len(pub) + 2);
2739 if (!hkey) {
2740 wpabuf_free(pub);
2741 wpabuf_clear_free(secret);
2742 return WLAN_STATUS_UNSPECIFIED_FAILURE;
2743 }
2744
2745 wpabuf_put_data(hkey, owe_dh + 2, owe_dh_len - 2); /* C */
2746 wpabuf_put_buf(hkey, pub); /* A */
2747 wpabuf_free(pub);
2748 wpabuf_put_le16(hkey, group); /* group */
2749 if (group == 19)
2750 res = hmac_sha256(wpabuf_head(hkey), wpabuf_len(hkey),
2751 wpabuf_head(secret), wpabuf_len(secret), prk);
2752 else if (group == 20)
2753 res = hmac_sha384(wpabuf_head(hkey), wpabuf_len(hkey),
2754 wpabuf_head(secret), wpabuf_len(secret), prk);
2755 else if (group == 21)
2756 res = hmac_sha512(wpabuf_head(hkey), wpabuf_len(hkey),
2757 wpabuf_head(secret), wpabuf_len(secret), prk);
2758 wpabuf_clear_free(hkey);
2759 wpabuf_clear_free(secret);
2760 if (res < 0)
2761 return WLAN_STATUS_UNSPECIFIED_FAILURE;
2762
2763 wpa_hexdump_key(MSG_DEBUG, "OWE: prk", prk, hash_len);
2764
2765 /* PMK = HKDF-expand(prk, "OWE Key Generation", n) */
2766
2767 os_free(sta->owe_pmk);
2768 sta->owe_pmk = os_malloc(hash_len);
2769 if (!sta->owe_pmk) {
2770 os_memset(prk, 0, SHA512_MAC_LEN);
2771 return WLAN_STATUS_UNSPECIFIED_FAILURE;
2772 }
2773
2774 if (group == 19)
2775 res = hmac_sha256_kdf(prk, hash_len, NULL, (const u8 *) info,
2776 os_strlen(info), sta->owe_pmk, hash_len);
2777 else if (group == 20)
2778 res = hmac_sha384_kdf(prk, hash_len, NULL, (const u8 *) info,
2779 os_strlen(info), sta->owe_pmk, hash_len);
2780 else if (group == 21)
2781 res = hmac_sha512_kdf(prk, hash_len, NULL, (const u8 *) info,
2782 os_strlen(info), sta->owe_pmk, hash_len);
2783 os_memset(prk, 0, SHA512_MAC_LEN);
2784 if (res < 0) {
2785 os_free(sta->owe_pmk);
2786 sta->owe_pmk = NULL;
2787 return WLAN_STATUS_UNSPECIFIED_FAILURE;
2788 }
2789 sta->owe_pmk_len = hash_len;
2790
2791 wpa_hexdump_key(MSG_DEBUG, "OWE: PMK", sta->owe_pmk, sta->owe_pmk_len);
2792 wpa_hexdump(MSG_DEBUG, "OWE: PMKID", pmkid, PMKID_LEN);
2793 wpa_auth_pmksa_add2(hapd->wpa_auth, sta->addr, sta->owe_pmk,
2794 sta->owe_pmk_len, pmkid, 0, WPA_KEY_MGMT_OWE);
2795
2796 return WLAN_STATUS_SUCCESS;
2797 }
2798
2799
owe_validate_request(struct hostapd_data * hapd,const u8 * peer,const u8 * rsn_ie,size_t rsn_ie_len,const u8 * owe_dh,size_t owe_dh_len)2800 u16 owe_validate_request(struct hostapd_data *hapd, const u8 *peer,
2801 const u8 *rsn_ie, size_t rsn_ie_len,
2802 const u8 *owe_dh, size_t owe_dh_len)
2803 {
2804 struct wpa_ie_data data;
2805 int res;
2806
2807 if (!rsn_ie || rsn_ie_len < 2) {
2808 wpa_printf(MSG_DEBUG, "OWE: Invalid RSNE from " MACSTR,
2809 MAC2STR(peer));
2810 return WLAN_STATUS_INVALID_IE;
2811 }
2812 rsn_ie -= 2;
2813 rsn_ie_len += 2;
2814
2815 res = wpa_parse_wpa_ie_rsn(rsn_ie, rsn_ie_len, &data);
2816 if (res) {
2817 wpa_printf(MSG_DEBUG, "Failed to parse RSNE from " MACSTR
2818 " (res=%d)", MAC2STR(peer), res);
2819 wpa_hexdump(MSG_DEBUG, "RSNE", rsn_ie, rsn_ie_len);
2820 return wpa_res_to_status_code(res);
2821 }
2822 if (!(data.key_mgmt & WPA_KEY_MGMT_OWE)) {
2823 wpa_printf(MSG_DEBUG,
2824 "OWE: Unexpected key mgmt 0x%x from " MACSTR,
2825 (unsigned int) data.key_mgmt, MAC2STR(peer));
2826 return WLAN_STATUS_AKMP_NOT_VALID;
2827 }
2828 if (!owe_dh) {
2829 wpa_printf(MSG_DEBUG,
2830 "OWE: No Diffie-Hellman Parameter element from "
2831 MACSTR, MAC2STR(peer));
2832 return WLAN_STATUS_AKMP_NOT_VALID;
2833 }
2834
2835 return WLAN_STATUS_SUCCESS;
2836 }
2837
2838
owe_process_rsn_ie(struct hostapd_data * hapd,struct sta_info * sta,const u8 * rsn_ie,size_t rsn_ie_len,const u8 * owe_dh,size_t owe_dh_len)2839 u16 owe_process_rsn_ie(struct hostapd_data *hapd,
2840 struct sta_info *sta,
2841 const u8 *rsn_ie, size_t rsn_ie_len,
2842 const u8 *owe_dh, size_t owe_dh_len)
2843 {
2844 u16 status;
2845 u8 *owe_buf, ie[256 * 2];
2846 size_t ie_len = 0;
2847 int res;
2848
2849 if (!rsn_ie || rsn_ie_len < 2) {
2850 wpa_printf(MSG_DEBUG, "OWE: No RSNE in (Re)AssocReq");
2851 status = WLAN_STATUS_INVALID_IE;
2852 goto end;
2853 }
2854
2855 if (!sta->wpa_sm)
2856 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth, sta->addr,
2857 NULL);
2858 if (!sta->wpa_sm) {
2859 wpa_printf(MSG_WARNING,
2860 "OWE: Failed to initialize WPA state machine");
2861 status = WLAN_STATUS_UNSPECIFIED_FAILURE;
2862 goto end;
2863 }
2864 rsn_ie -= 2;
2865 rsn_ie_len += 2;
2866 res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm,
2867 hapd->iface->freq, rsn_ie, rsn_ie_len,
2868 NULL, 0, owe_dh, owe_dh_len);
2869 status = wpa_res_to_status_code(res);
2870 if (status != WLAN_STATUS_SUCCESS)
2871 goto end;
2872 status = owe_process_assoc_req(hapd, sta, owe_dh, owe_dh_len);
2873 if (status != WLAN_STATUS_SUCCESS)
2874 goto end;
2875 owe_buf = wpa_auth_write_assoc_resp_owe(sta->wpa_sm, ie, sizeof(ie),
2876 NULL, 0);
2877 if (!owe_buf) {
2878 status = WLAN_STATUS_UNSPECIFIED_FAILURE;
2879 goto end;
2880 }
2881
2882 if (sta->owe_ecdh) {
2883 struct wpabuf *pub;
2884
2885 pub = crypto_ecdh_get_pubkey(sta->owe_ecdh, 0);
2886 if (!pub) {
2887 status = WLAN_STATUS_UNSPECIFIED_FAILURE;
2888 goto end;
2889 }
2890
2891 /* OWE Diffie-Hellman Parameter element */
2892 *owe_buf++ = WLAN_EID_EXTENSION; /* Element ID */
2893 *owe_buf++ = 1 + 2 + wpabuf_len(pub); /* Length */
2894 *owe_buf++ = WLAN_EID_EXT_OWE_DH_PARAM; /* Element ID Extension
2895 */
2896 WPA_PUT_LE16(owe_buf, sta->owe_group);
2897 owe_buf += 2;
2898 os_memcpy(owe_buf, wpabuf_head(pub), wpabuf_len(pub));
2899 owe_buf += wpabuf_len(pub);
2900 wpabuf_free(pub);
2901 sta->external_dh_updated = 1;
2902 }
2903 ie_len = owe_buf - ie;
2904
2905 end:
2906 wpa_printf(MSG_DEBUG, "OWE: Update status %d, ie len %d for peer "
2907 MACSTR, status, (unsigned int) ie_len,
2908 MAC2STR(sta->addr));
2909 hostapd_drv_update_dh_ie(hapd, sta->addr, status,
2910 status == WLAN_STATUS_SUCCESS ? ie : NULL,
2911 ie_len);
2912
2913 return status;
2914 }
2915
2916 #endif /* CONFIG_OWE */
2917
2918
check_assoc_ies(struct hostapd_data * hapd,struct sta_info * sta,const u8 * ies,size_t ies_len,int reassoc)2919 static u16 check_assoc_ies(struct hostapd_data *hapd, struct sta_info *sta,
2920 const u8 *ies, size_t ies_len, int reassoc)
2921 {
2922 struct ieee802_11_elems elems;
2923 u16 resp;
2924 const u8 *wpa_ie;
2925 size_t wpa_ie_len;
2926 const u8 *p2p_dev_addr = NULL;
2927
2928 if (ieee802_11_parse_elems(ies, ies_len, &elems, 1) == ParseFailed) {
2929 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
2930 HOSTAPD_LEVEL_INFO, "Station sent an invalid "
2931 "association request");
2932 return WLAN_STATUS_UNSPECIFIED_FAILURE;
2933 }
2934
2935 resp = check_ssid(hapd, sta, elems.ssid, elems.ssid_len);
2936 if (resp != WLAN_STATUS_SUCCESS)
2937 return resp;
2938 resp = check_wmm(hapd, sta, elems.wmm, elems.wmm_len);
2939 if (resp != WLAN_STATUS_SUCCESS)
2940 return resp;
2941 resp = check_ext_capab(hapd, sta, elems.ext_capab, elems.ext_capab_len);
2942 if (resp != WLAN_STATUS_SUCCESS)
2943 return resp;
2944 resp = copy_supp_rates(hapd, sta, &elems);
2945 if (resp != WLAN_STATUS_SUCCESS)
2946 return resp;
2947
2948 resp = check_multi_ap(hapd, sta, elems.multi_ap, elems.multi_ap_len);
2949 if (resp != WLAN_STATUS_SUCCESS)
2950 return resp;
2951
2952 #ifdef CONFIG_IEEE80211N
2953 resp = copy_sta_ht_capab(hapd, sta, elems.ht_capabilities);
2954 if (resp != WLAN_STATUS_SUCCESS)
2955 return resp;
2956 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht &&
2957 !(sta->flags & WLAN_STA_HT)) {
2958 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
2959 HOSTAPD_LEVEL_INFO, "Station does not support "
2960 "mandatory HT PHY - reject association");
2961 return WLAN_STATUS_ASSOC_DENIED_NO_HT;
2962 }
2963 #endif /* CONFIG_IEEE80211N */
2964
2965 #ifdef CONFIG_IEEE80211AC
2966 if (hapd->iconf->ieee80211ac) {
2967 resp = copy_sta_vht_capab(hapd, sta, elems.vht_capabilities);
2968 if (resp != WLAN_STATUS_SUCCESS)
2969 return resp;
2970
2971 resp = set_sta_vht_opmode(hapd, sta, elems.vht_opmode_notif);
2972 if (resp != WLAN_STATUS_SUCCESS)
2973 return resp;
2974 }
2975
2976 if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht &&
2977 !(sta->flags & WLAN_STA_VHT)) {
2978 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
2979 HOSTAPD_LEVEL_INFO, "Station does not support "
2980 "mandatory VHT PHY - reject association");
2981 return WLAN_STATUS_ASSOC_DENIED_NO_VHT;
2982 }
2983
2984 if (hapd->conf->vendor_vht && !elems.vht_capabilities) {
2985 resp = copy_sta_vendor_vht(hapd, sta, elems.vendor_vht,
2986 elems.vendor_vht_len);
2987 if (resp != WLAN_STATUS_SUCCESS)
2988 return resp;
2989 }
2990 #endif /* CONFIG_IEEE80211AC */
2991 #ifdef CONFIG_IEEE80211AX
2992 if (hapd->iconf->ieee80211ax) {
2993 resp = copy_sta_he_capab(hapd, sta, IEEE80211_MODE_AP,
2994 elems.he_capabilities,
2995 elems.he_capabilities_len);
2996 if (resp != WLAN_STATUS_SUCCESS)
2997 return resp;
2998 }
2999 #endif /* CONFIG_IEEE80211AX */
3000
3001 #ifdef CONFIG_P2P
3002 if (elems.p2p) {
3003 wpabuf_free(sta->p2p_ie);
3004 sta->p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
3005 P2P_IE_VENDOR_TYPE);
3006 if (sta->p2p_ie)
3007 p2p_dev_addr = p2p_get_go_dev_addr(sta->p2p_ie);
3008 } else {
3009 wpabuf_free(sta->p2p_ie);
3010 sta->p2p_ie = NULL;
3011 }
3012 #endif /* CONFIG_P2P */
3013
3014 if ((hapd->conf->wpa & WPA_PROTO_RSN) && elems.rsn_ie) {
3015 wpa_ie = elems.rsn_ie;
3016 wpa_ie_len = elems.rsn_ie_len;
3017 } else if ((hapd->conf->wpa & WPA_PROTO_WPA) &&
3018 elems.wpa_ie) {
3019 wpa_ie = elems.wpa_ie;
3020 wpa_ie_len = elems.wpa_ie_len;
3021 } else {
3022 wpa_ie = NULL;
3023 wpa_ie_len = 0;
3024 }
3025
3026 #ifdef CONFIG_WPS
3027 sta->flags &= ~(WLAN_STA_WPS | WLAN_STA_MAYBE_WPS | WLAN_STA_WPS2);
3028 if (hapd->conf->wps_state && elems.wps_ie) {
3029 wpa_printf(MSG_DEBUG, "STA included WPS IE in (Re)Association "
3030 "Request - assume WPS is used");
3031 sta->flags |= WLAN_STA_WPS;
3032 wpabuf_free(sta->wps_ie);
3033 sta->wps_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
3034 WPS_IE_VENDOR_TYPE);
3035 if (sta->wps_ie && wps_is_20(sta->wps_ie)) {
3036 wpa_printf(MSG_DEBUG, "WPS: STA supports WPS 2.0");
3037 sta->flags |= WLAN_STA_WPS2;
3038 }
3039 wpa_ie = NULL;
3040 wpa_ie_len = 0;
3041 if (sta->wps_ie && wps_validate_assoc_req(sta->wps_ie) < 0) {
3042 wpa_printf(MSG_DEBUG, "WPS: Invalid WPS IE in "
3043 "(Re)Association Request - reject");
3044 return WLAN_STATUS_INVALID_IE;
3045 }
3046 } else if (hapd->conf->wps_state && wpa_ie == NULL) {
3047 wpa_printf(MSG_DEBUG, "STA did not include WPA/RSN IE in "
3048 "(Re)Association Request - possible WPS use");
3049 sta->flags |= WLAN_STA_MAYBE_WPS;
3050 } else
3051 #endif /* CONFIG_WPS */
3052 if (hapd->conf->wpa && wpa_ie == NULL) {
3053 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
3054 HOSTAPD_LEVEL_INFO,
3055 "No WPA/RSN IE in association request");
3056 return WLAN_STATUS_INVALID_IE;
3057 }
3058
3059 if (hapd->conf->wpa && wpa_ie) {
3060 int res;
3061 wpa_ie -= 2;
3062 wpa_ie_len += 2;
3063 if (sta->wpa_sm == NULL)
3064 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
3065 sta->addr,
3066 p2p_dev_addr);
3067 if (sta->wpa_sm == NULL) {
3068 wpa_printf(MSG_WARNING, "Failed to initialize WPA "
3069 "state machine");
3070 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3071 }
3072 wpa_auth_set_auth_alg(sta->wpa_sm, sta->auth_alg);
3073 res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm,
3074 hapd->iface->freq,
3075 wpa_ie, wpa_ie_len,
3076 elems.mdie, elems.mdie_len,
3077 elems.owe_dh, elems.owe_dh_len);
3078 resp = wpa_res_to_status_code(res);
3079 if (resp != WLAN_STATUS_SUCCESS)
3080 return resp;
3081 #ifdef CONFIG_IEEE80211W
3082 if ((sta->flags & (WLAN_STA_ASSOC | WLAN_STA_MFP)) ==
3083 (WLAN_STA_ASSOC | WLAN_STA_MFP) &&
3084 !sta->sa_query_timed_out &&
3085 sta->sa_query_count > 0)
3086 ap_check_sa_query_timeout(hapd, sta);
3087 if ((sta->flags & (WLAN_STA_ASSOC | WLAN_STA_MFP)) ==
3088 (WLAN_STA_ASSOC | WLAN_STA_MFP) &&
3089 !sta->sa_query_timed_out &&
3090 (!reassoc || sta->auth_alg != WLAN_AUTH_FT)) {
3091 /*
3092 * STA has already been associated with MFP and SA
3093 * Query timeout has not been reached. Reject the
3094 * association attempt temporarily and start SA Query,
3095 * if one is not pending.
3096 */
3097
3098 if (sta->sa_query_count == 0)
3099 ap_sta_start_sa_query(hapd, sta);
3100
3101 return WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY;
3102 }
3103
3104 if (wpa_auth_uses_mfp(sta->wpa_sm))
3105 sta->flags |= WLAN_STA_MFP;
3106 else
3107 sta->flags &= ~WLAN_STA_MFP;
3108 #endif /* CONFIG_IEEE80211W */
3109
3110 #ifdef CONFIG_IEEE80211R_AP
3111 if (sta->auth_alg == WLAN_AUTH_FT) {
3112 if (!reassoc) {
3113 wpa_printf(MSG_DEBUG, "FT: " MACSTR " tried "
3114 "to use association (not "
3115 "re-association) with FT auth_alg",
3116 MAC2STR(sta->addr));
3117 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3118 }
3119
3120 resp = wpa_ft_validate_reassoc(sta->wpa_sm, ies,
3121 ies_len);
3122 if (resp != WLAN_STATUS_SUCCESS)
3123 return resp;
3124 }
3125 #endif /* CONFIG_IEEE80211R_AP */
3126
3127 #ifdef CONFIG_SAE
3128 if (wpa_auth_uses_sae(sta->wpa_sm) && sta->sae &&
3129 sta->sae->state == SAE_ACCEPTED)
3130 wpa_auth_add_sae_pmkid(sta->wpa_sm, sta->sae->pmkid);
3131
3132 if (wpa_auth_uses_sae(sta->wpa_sm) &&
3133 sta->auth_alg == WLAN_AUTH_OPEN) {
3134 struct rsn_pmksa_cache_entry *sa;
3135 sa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
3136 if (!sa || sa->akmp != WPA_KEY_MGMT_SAE) {
3137 wpa_printf(MSG_DEBUG,
3138 "SAE: No PMKSA cache entry found for "
3139 MACSTR, MAC2STR(sta->addr));
3140 return WLAN_STATUS_INVALID_PMKID;
3141 }
3142 wpa_printf(MSG_DEBUG, "SAE: " MACSTR
3143 " using PMKSA caching", MAC2STR(sta->addr));
3144 } else if (wpa_auth_uses_sae(sta->wpa_sm) &&
3145 sta->auth_alg != WLAN_AUTH_SAE &&
3146 !(sta->auth_alg == WLAN_AUTH_FT &&
3147 wpa_auth_uses_ft_sae(sta->wpa_sm))) {
3148 wpa_printf(MSG_DEBUG, "SAE: " MACSTR " tried to use "
3149 "SAE AKM after non-SAE auth_alg %u",
3150 MAC2STR(sta->addr), sta->auth_alg);
3151 return WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
3152 }
3153 #endif /* CONFIG_SAE */
3154
3155 #ifdef CONFIG_OWE
3156 if ((hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_OWE) &&
3157 wpa_auth_sta_key_mgmt(sta->wpa_sm) == WPA_KEY_MGMT_OWE &&
3158 elems.owe_dh) {
3159 resp = owe_process_assoc_req(hapd, sta, elems.owe_dh,
3160 elems.owe_dh_len);
3161 if (resp != WLAN_STATUS_SUCCESS)
3162 return resp;
3163 }
3164 #endif /* CONFIG_OWE */
3165
3166 #ifdef CONFIG_DPP2
3167 dpp_pfs_free(sta->dpp_pfs);
3168 sta->dpp_pfs = NULL;
3169
3170 if ((hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_DPP) &&
3171 hapd->conf->dpp_netaccesskey && sta->wpa_sm &&
3172 wpa_auth_sta_key_mgmt(sta->wpa_sm) == WPA_KEY_MGMT_DPP &&
3173 elems.owe_dh) {
3174 sta->dpp_pfs = dpp_pfs_init(
3175 wpabuf_head(hapd->conf->dpp_netaccesskey),
3176 wpabuf_len(hapd->conf->dpp_netaccesskey));
3177 if (!sta->dpp_pfs) {
3178 wpa_printf(MSG_DEBUG,
3179 "DPP: Could not initialize PFS");
3180 /* Try to continue without PFS */
3181 goto pfs_fail;
3182 }
3183
3184 if (dpp_pfs_process(sta->dpp_pfs, elems.owe_dh,
3185 elems.owe_dh_len) < 0) {
3186 dpp_pfs_free(sta->dpp_pfs);
3187 sta->dpp_pfs = NULL;
3188 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3189 }
3190 }
3191
3192 wpa_auth_set_dpp_z(sta->wpa_sm, sta->dpp_pfs ?
3193 sta->dpp_pfs->secret : NULL);
3194 pfs_fail:
3195 #endif /* CONFIG_DPP2 */
3196
3197 #ifdef CONFIG_IEEE80211N
3198 if ((sta->flags & (WLAN_STA_HT | WLAN_STA_VHT)) &&
3199 wpa_auth_get_pairwise(sta->wpa_sm) == WPA_CIPHER_TKIP) {
3200 hostapd_logger(hapd, sta->addr,
3201 HOSTAPD_MODULE_IEEE80211,
3202 HOSTAPD_LEVEL_INFO,
3203 "Station tried to use TKIP with HT "
3204 "association");
3205 return WLAN_STATUS_CIPHER_REJECTED_PER_POLICY;
3206 }
3207 #endif /* CONFIG_IEEE80211N */
3208 #ifdef CONFIG_HS20
3209 } else if (hapd->conf->osen) {
3210 if (elems.osen == NULL) {
3211 hostapd_logger(
3212 hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
3213 HOSTAPD_LEVEL_INFO,
3214 "No HS 2.0 OSEN element in association request");
3215 return WLAN_STATUS_INVALID_IE;
3216 }
3217
3218 wpa_printf(MSG_DEBUG, "HS 2.0: OSEN association");
3219 if (sta->wpa_sm == NULL)
3220 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
3221 sta->addr, NULL);
3222 if (sta->wpa_sm == NULL) {
3223 wpa_printf(MSG_WARNING, "Failed to initialize WPA "
3224 "state machine");
3225 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3226 }
3227 if (wpa_validate_osen(hapd->wpa_auth, sta->wpa_sm,
3228 elems.osen - 2, elems.osen_len + 2) < 0)
3229 return WLAN_STATUS_INVALID_IE;
3230 #endif /* CONFIG_HS20 */
3231 } else
3232 wpa_auth_sta_no_wpa(sta->wpa_sm);
3233
3234 #ifdef CONFIG_P2P
3235 p2p_group_notif_assoc(hapd->p2p_group, sta->addr, ies, ies_len);
3236 #endif /* CONFIG_P2P */
3237
3238 #ifdef CONFIG_HS20
3239 wpabuf_free(sta->hs20_ie);
3240 if (elems.hs20 && elems.hs20_len > 4) {
3241 int release;
3242
3243 sta->hs20_ie = wpabuf_alloc_copy(elems.hs20 + 4,
3244 elems.hs20_len - 4);
3245 release = ((elems.hs20[4] >> 4) & 0x0f) + 1;
3246 if (release >= 2 && !wpa_auth_uses_mfp(sta->wpa_sm)) {
3247 wpa_printf(MSG_DEBUG,
3248 "HS 2.0: PMF not negotiated by release %d station "
3249 MACSTR, release, MAC2STR(sta->addr));
3250 return WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION;
3251 }
3252 } else {
3253 sta->hs20_ie = NULL;
3254 }
3255
3256 wpabuf_free(sta->roaming_consortium);
3257 if (elems.roaming_cons_sel)
3258 sta->roaming_consortium = wpabuf_alloc_copy(
3259 elems.roaming_cons_sel + 4,
3260 elems.roaming_cons_sel_len - 4);
3261 else
3262 sta->roaming_consortium = NULL;
3263 #endif /* CONFIG_HS20 */
3264
3265 #ifdef CONFIG_FST
3266 wpabuf_free(sta->mb_ies);
3267 if (hapd->iface->fst)
3268 sta->mb_ies = mb_ies_by_info(&elems.mb_ies);
3269 else
3270 sta->mb_ies = NULL;
3271 #endif /* CONFIG_FST */
3272
3273 #ifdef CONFIG_MBO
3274 mbo_ap_check_sta_assoc(hapd, sta, &elems);
3275
3276 if (hapd->conf->mbo_enabled && (hapd->conf->wpa & 2) &&
3277 elems.mbo && sta->cell_capa && !(sta->flags & WLAN_STA_MFP) &&
3278 hapd->conf->ieee80211w != NO_MGMT_FRAME_PROTECTION) {
3279 wpa_printf(MSG_INFO,
3280 "MBO: Reject WPA2 association without PMF");
3281 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3282 }
3283 #endif /* CONFIG_MBO */
3284
3285 #if defined(CONFIG_FILS) && defined(CONFIG_OCV)
3286 if (wpa_auth_uses_ocv(sta->wpa_sm) &&
3287 (sta->auth_alg == WLAN_AUTH_FILS_SK ||
3288 sta->auth_alg == WLAN_AUTH_FILS_SK_PFS ||
3289 sta->auth_alg == WLAN_AUTH_FILS_PK)) {
3290 struct wpa_channel_info ci;
3291 int tx_chanwidth;
3292 int tx_seg1_idx;
3293
3294 if (hostapd_drv_channel_info(hapd, &ci) != 0) {
3295 wpa_printf(MSG_WARNING,
3296 "Failed to get channel info to validate received OCI in FILS (Re)Association Request frame");
3297 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3298 }
3299
3300 if (get_sta_tx_parameters(sta->wpa_sm,
3301 channel_width_to_int(ci.chanwidth),
3302 ci.seg1_idx, &tx_chanwidth,
3303 &tx_seg1_idx) < 0)
3304 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3305
3306 if (ocv_verify_tx_params(elems.oci, elems.oci_len, &ci,
3307 tx_chanwidth, tx_seg1_idx) != 0) {
3308 wpa_printf(MSG_WARNING, "FILS: %s", ocv_errorstr);
3309 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3310 }
3311 }
3312 #endif /* CONFIG_FILS && CONFIG_OCV */
3313
3314 ap_copy_sta_supp_op_classes(sta, elems.supp_op_classes,
3315 elems.supp_op_classes_len);
3316
3317 if ((sta->capability & WLAN_CAPABILITY_RADIO_MEASUREMENT) &&
3318 elems.rrm_enabled &&
3319 elems.rrm_enabled_len >= sizeof(sta->rrm_enabled_capa))
3320 os_memcpy(sta->rrm_enabled_capa, elems.rrm_enabled,
3321 sizeof(sta->rrm_enabled_capa));
3322
3323 if (elems.power_capab) {
3324 sta->min_tx_power = elems.power_capab[0];
3325 sta->max_tx_power = elems.power_capab[1];
3326 sta->power_capab = 1;
3327 } else {
3328 sta->power_capab = 0;
3329 }
3330
3331 return WLAN_STATUS_SUCCESS;
3332 }
3333
3334
send_deauth(struct hostapd_data * hapd,const u8 * addr,u16 reason_code)3335 static void send_deauth(struct hostapd_data *hapd, const u8 *addr,
3336 u16 reason_code)
3337 {
3338 int send_len;
3339 struct ieee80211_mgmt reply;
3340
3341 os_memset(&reply, 0, sizeof(reply));
3342 reply.frame_control =
3343 IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_DEAUTH);
3344 os_memcpy(reply.da, addr, ETH_ALEN);
3345 os_memcpy(reply.sa, hapd->own_addr, ETH_ALEN);
3346 os_memcpy(reply.bssid, hapd->own_addr, ETH_ALEN);
3347
3348 send_len = IEEE80211_HDRLEN + sizeof(reply.u.deauth);
3349 reply.u.deauth.reason_code = host_to_le16(reason_code);
3350
3351 if (hostapd_drv_send_mlme(hapd, &reply, send_len, 0) < 0)
3352 wpa_printf(MSG_INFO, "Failed to send deauth: %s",
3353 strerror(errno));
3354 }
3355
3356
add_associated_sta(struct hostapd_data * hapd,struct sta_info * sta,int reassoc)3357 static int add_associated_sta(struct hostapd_data *hapd,
3358 struct sta_info *sta, int reassoc)
3359 {
3360 struct ieee80211_ht_capabilities ht_cap;
3361 struct ieee80211_vht_capabilities vht_cap;
3362 struct ieee80211_he_capabilities he_cap;
3363 int set = 1;
3364
3365 /*
3366 * Remove the STA entry to ensure the STA PS state gets cleared and
3367 * configuration gets updated. This is relevant for cases, such as
3368 * FT-over-the-DS, where a station re-associates back to the same AP but
3369 * skips the authentication flow, or if working with a driver that
3370 * does not support full AP client state.
3371 *
3372 * Skip this if the STA has already completed FT reassociation and the
3373 * TK has been configured since the TX/RX PN must not be reset to 0 for
3374 * the same key.
3375 *
3376 * FT-over-the-DS has a special case where the STA entry (and as such,
3377 * the TK) has not yet been configured to the driver depending on which
3378 * driver interface is used. For that case, allow add-STA operation to
3379 * be used (instead of set-STA). This is needed to allow mac80211-based
3380 * drivers to accept the STA parameter configuration. Since this is
3381 * after a new FT-over-DS exchange, a new TK has been derived, so key
3382 * reinstallation is not a concern for this case.
3383 */
3384 wpa_printf(MSG_DEBUG, "Add associated STA " MACSTR
3385 " (added_unassoc=%d auth_alg=%u ft_over_ds=%u reassoc=%d authorized=%d ft_tk=%d fils_tk=%d)",
3386 MAC2STR(sta->addr), sta->added_unassoc, sta->auth_alg,
3387 sta->ft_over_ds, reassoc,
3388 !!(sta->flags & WLAN_STA_AUTHORIZED),
3389 wpa_auth_sta_ft_tk_already_set(sta->wpa_sm),
3390 wpa_auth_sta_fils_tk_already_set(sta->wpa_sm));
3391
3392 if (!sta->added_unassoc &&
3393 (!(sta->flags & WLAN_STA_AUTHORIZED) ||
3394 (reassoc && sta->ft_over_ds && sta->auth_alg == WLAN_AUTH_FT) ||
3395 (!wpa_auth_sta_ft_tk_already_set(sta->wpa_sm) &&
3396 !wpa_auth_sta_fils_tk_already_set(sta->wpa_sm)))) {
3397 hostapd_drv_sta_remove(hapd, sta->addr);
3398 wpa_auth_sm_event(sta->wpa_sm, WPA_DRV_STA_REMOVED);
3399 set = 0;
3400
3401 /* Do not allow the FT-over-DS exception to be used more than
3402 * once per authentication exchange to guarantee a new TK is
3403 * used here */
3404 sta->ft_over_ds = 0;
3405 }
3406
3407 #ifdef CONFIG_IEEE80211N
3408 if (sta->flags & WLAN_STA_HT)
3409 hostapd_get_ht_capab(hapd, sta->ht_capabilities, &ht_cap);
3410 #endif /* CONFIG_IEEE80211N */
3411 #ifdef CONFIG_IEEE80211AC
3412 if (sta->flags & WLAN_STA_VHT)
3413 hostapd_get_vht_capab(hapd, sta->vht_capabilities, &vht_cap);
3414 #endif /* CONFIG_IEEE80211AC */
3415 #ifdef CONFIG_IEEE80211AX
3416 if (sta->flags & WLAN_STA_HE) {
3417 hostapd_get_he_capab(hapd, sta->he_capab, &he_cap,
3418 sta->he_capab_len);
3419 }
3420 #endif /* CONFIG_IEEE80211AX */
3421
3422 /*
3423 * Add the station with forced WLAN_STA_ASSOC flag. The sta->flags
3424 * will be set when the ACK frame for the (Re)Association Response frame
3425 * is processed (TX status driver event).
3426 */
3427 if (hostapd_sta_add(hapd, sta->addr, sta->aid, sta->capability,
3428 sta->supported_rates, sta->supported_rates_len,
3429 sta->listen_interval,
3430 sta->flags & WLAN_STA_HT ? &ht_cap : NULL,
3431 sta->flags & WLAN_STA_VHT ? &vht_cap : NULL,
3432 sta->flags & WLAN_STA_HE ? &he_cap : NULL,
3433 sta->flags & WLAN_STA_HE ? sta->he_capab_len : 0,
3434 sta->flags | WLAN_STA_ASSOC, sta->qosinfo,
3435 sta->vht_opmode, sta->p2p_ie ? 1 : 0,
3436 set)) {
3437 hostapd_logger(hapd, sta->addr,
3438 HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_NOTICE,
3439 "Could not %s STA to kernel driver",
3440 set ? "set" : "add");
3441
3442 if (sta->added_unassoc) {
3443 hostapd_drv_sta_remove(hapd, sta->addr);
3444 sta->added_unassoc = 0;
3445 }
3446
3447 return -1;
3448 }
3449
3450 sta->added_unassoc = 0;
3451
3452 return 0;
3453 }
3454
3455
send_assoc_resp(struct hostapd_data * hapd,struct sta_info * sta,const u8 * addr,u16 status_code,int reassoc,const u8 * ies,size_t ies_len,int rssi)3456 static u16 send_assoc_resp(struct hostapd_data *hapd, struct sta_info *sta,
3457 const u8 *addr, u16 status_code, int reassoc,
3458 const u8 *ies, size_t ies_len, int rssi)
3459 {
3460 int send_len;
3461 u8 *buf;
3462 size_t buflen;
3463 struct ieee80211_mgmt *reply;
3464 u8 *p;
3465 u16 res = WLAN_STATUS_SUCCESS;
3466
3467 buflen = sizeof(struct ieee80211_mgmt) + 1024;
3468 #ifdef CONFIG_FILS
3469 if (sta && sta->fils_hlp_resp)
3470 buflen += wpabuf_len(sta->fils_hlp_resp);
3471 if (sta)
3472 buflen += 150;
3473 #endif /* CONFIG_FILS */
3474 #ifdef CONFIG_OWE
3475 if (sta && (hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_OWE))
3476 buflen += 150;
3477 #endif /* CONFIG_OWE */
3478 #ifdef CONFIG_DPP2
3479 if (sta && sta->dpp_pfs)
3480 buflen += 5 + sta->dpp_pfs->curve->prime_len;
3481 #endif /* CONFIG_DPP2 */
3482 buf = os_zalloc(buflen);
3483 if (!buf) {
3484 res = WLAN_STATUS_UNSPECIFIED_FAILURE;
3485 goto done;
3486 }
3487 reply = (struct ieee80211_mgmt *) buf;
3488 reply->frame_control =
3489 IEEE80211_FC(WLAN_FC_TYPE_MGMT,
3490 (reassoc ? WLAN_FC_STYPE_REASSOC_RESP :
3491 WLAN_FC_STYPE_ASSOC_RESP));
3492 os_memcpy(reply->da, addr, ETH_ALEN);
3493 os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN);
3494 os_memcpy(reply->bssid, hapd->own_addr, ETH_ALEN);
3495
3496 send_len = IEEE80211_HDRLEN;
3497 send_len += sizeof(reply->u.assoc_resp);
3498 reply->u.assoc_resp.capab_info =
3499 host_to_le16(hostapd_own_capab_info(hapd));
3500 reply->u.assoc_resp.status_code = host_to_le16(status_code);
3501
3502 reply->u.assoc_resp.aid = host_to_le16((sta ? sta->aid : 0) |
3503 BIT(14) | BIT(15));
3504 /* Supported rates */
3505 p = hostapd_eid_supp_rates(hapd, reply->u.assoc_resp.variable);
3506 /* Extended supported rates */
3507 p = hostapd_eid_ext_supp_rates(hapd, p);
3508
3509 #ifdef CONFIG_MBO
3510 if (status_code == WLAN_STATUS_DENIED_POOR_CHANNEL_CONDITIONS &&
3511 rssi != 0) {
3512 int delta = hapd->iconf->rssi_reject_assoc_rssi - rssi;
3513
3514 p = hostapd_eid_mbo_rssi_assoc_rej(hapd, p, buf + buflen - p,
3515 delta);
3516 }
3517 #endif /* CONFIG_MBO */
3518
3519 #ifdef CONFIG_IEEE80211R_AP
3520 if (sta && status_code == WLAN_STATUS_SUCCESS) {
3521 /* IEEE 802.11r: Mobility Domain Information, Fast BSS
3522 * Transition Information, RSN, [RIC Response] */
3523 p = wpa_sm_write_assoc_resp_ies(sta->wpa_sm, p,
3524 buf + buflen - p,
3525 sta->auth_alg, ies, ies_len);
3526 if (!p) {
3527 wpa_printf(MSG_DEBUG,
3528 "FT: Failed to write AssocResp IEs");
3529 res = WLAN_STATUS_UNSPECIFIED_FAILURE;
3530 goto done;
3531 }
3532 }
3533 #endif /* CONFIG_IEEE80211R_AP */
3534 #ifdef CONFIG_FILS
3535 if (sta && status_code == WLAN_STATUS_SUCCESS &&
3536 (sta->auth_alg == WLAN_AUTH_FILS_SK ||
3537 sta->auth_alg == WLAN_AUTH_FILS_SK_PFS ||
3538 sta->auth_alg == WLAN_AUTH_FILS_PK))
3539 p = wpa_auth_write_assoc_resp_fils(sta->wpa_sm, p,
3540 buf + buflen - p,
3541 ies, ies_len);
3542 #endif /* CONFIG_FILS */
3543
3544 #ifdef CONFIG_OWE
3545 if (sta && status_code == WLAN_STATUS_SUCCESS &&
3546 (hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_OWE))
3547 p = wpa_auth_write_assoc_resp_owe(sta->wpa_sm, p,
3548 buf + buflen - p,
3549 ies, ies_len);
3550 #endif /* CONFIG_OWE */
3551
3552 #ifdef CONFIG_IEEE80211W
3553 if (sta && status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY)
3554 p = hostapd_eid_assoc_comeback_time(hapd, sta, p);
3555 #endif /* CONFIG_IEEE80211W */
3556
3557 #ifdef CONFIG_IEEE80211N
3558 p = hostapd_eid_ht_capabilities(hapd, p);
3559 p = hostapd_eid_ht_operation(hapd, p);
3560 #endif /* CONFIG_IEEE80211N */
3561
3562 #ifdef CONFIG_IEEE80211AC
3563 if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
3564 u32 nsts = 0, sta_nsts;
3565
3566 if (sta && hapd->conf->use_sta_nsts && sta->vht_capabilities) {
3567 struct ieee80211_vht_capabilities *capa;
3568
3569 nsts = (hapd->iface->conf->vht_capab >>
3570 VHT_CAP_BEAMFORMEE_STS_OFFSET) & 7;
3571 capa = sta->vht_capabilities;
3572 sta_nsts = (le_to_host32(capa->vht_capabilities_info) >>
3573 VHT_CAP_BEAMFORMEE_STS_OFFSET) & 7;
3574
3575 if (nsts < sta_nsts)
3576 nsts = 0;
3577 else
3578 nsts = sta_nsts;
3579 }
3580 p = hostapd_eid_vht_capabilities(hapd, p, nsts);
3581 p = hostapd_eid_vht_operation(hapd, p);
3582 }
3583 #endif /* CONFIG_IEEE80211AC */
3584
3585 #ifdef CONFIG_IEEE80211AX
3586 if (hapd->iconf->ieee80211ax) {
3587 p = hostapd_eid_he_capab(hapd, p, IEEE80211_MODE_AP);
3588 p = hostapd_eid_he_operation(hapd, p);
3589 p = hostapd_eid_spatial_reuse(hapd, p);
3590 p = hostapd_eid_he_mu_edca_parameter_set(hapd, p);
3591 }
3592 #endif /* CONFIG_IEEE80211AX */
3593
3594 p = hostapd_eid_ext_capab(hapd, p);
3595 p = hostapd_eid_bss_max_idle_period(hapd, p);
3596 if (sta && sta->qos_map_enabled)
3597 p = hostapd_eid_qos_map_set(hapd, p);
3598
3599 #ifdef CONFIG_FST
3600 if (hapd->iface->fst_ies) {
3601 os_memcpy(p, wpabuf_head(hapd->iface->fst_ies),
3602 wpabuf_len(hapd->iface->fst_ies));
3603 p += wpabuf_len(hapd->iface->fst_ies);
3604 }
3605 #endif /* CONFIG_FST */
3606
3607 #ifdef CONFIG_OWE
3608 if ((hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_OWE) &&
3609 sta && sta->owe_ecdh && status_code == WLAN_STATUS_SUCCESS &&
3610 wpa_auth_sta_key_mgmt(sta->wpa_sm) == WPA_KEY_MGMT_OWE) {
3611 struct wpabuf *pub;
3612
3613 pub = crypto_ecdh_get_pubkey(sta->owe_ecdh, 0);
3614 if (!pub) {
3615 res = WLAN_STATUS_UNSPECIFIED_FAILURE;
3616 goto done;
3617 }
3618 /* OWE Diffie-Hellman Parameter element */
3619 *p++ = WLAN_EID_EXTENSION; /* Element ID */
3620 *p++ = 1 + 2 + wpabuf_len(pub); /* Length */
3621 *p++ = WLAN_EID_EXT_OWE_DH_PARAM; /* Element ID Extension */
3622 WPA_PUT_LE16(p, sta->owe_group);
3623 p += 2;
3624 os_memcpy(p, wpabuf_head(pub), wpabuf_len(pub));
3625 p += wpabuf_len(pub);
3626 wpabuf_free(pub);
3627 }
3628 #endif /* CONFIG_OWE */
3629
3630 #ifdef CONFIG_DPP2
3631 if ((hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_DPP) &&
3632 sta && sta->dpp_pfs && status_code == WLAN_STATUS_SUCCESS &&
3633 wpa_auth_sta_key_mgmt(sta->wpa_sm) == WPA_KEY_MGMT_DPP) {
3634 os_memcpy(p, wpabuf_head(sta->dpp_pfs->ie),
3635 wpabuf_len(sta->dpp_pfs->ie));
3636 p += wpabuf_len(sta->dpp_pfs->ie);
3637 }
3638 #endif /* CONFIG_DPP2 */
3639
3640 #ifdef CONFIG_IEEE80211AC
3641 if (sta && hapd->conf->vendor_vht && (sta->flags & WLAN_STA_VENDOR_VHT))
3642 p = hostapd_eid_vendor_vht(hapd, p);
3643 #endif /* CONFIG_IEEE80211AC */
3644
3645 if (sta && (sta->flags & WLAN_STA_WMM))
3646 p = hostapd_eid_wmm(hapd, p);
3647
3648 #ifdef CONFIG_WPS
3649 if (sta &&
3650 ((sta->flags & WLAN_STA_WPS) ||
3651 ((sta->flags & WLAN_STA_MAYBE_WPS) && hapd->conf->wpa))) {
3652 struct wpabuf *wps = wps_build_assoc_resp_ie();
3653 if (wps) {
3654 os_memcpy(p, wpabuf_head(wps), wpabuf_len(wps));
3655 p += wpabuf_len(wps);
3656 wpabuf_free(wps);
3657 }
3658 }
3659 #endif /* CONFIG_WPS */
3660
3661 if (sta && (sta->flags & WLAN_STA_MULTI_AP))
3662 p = hostapd_eid_multi_ap(hapd, p);
3663
3664 #ifdef CONFIG_P2P
3665 if (sta && sta->p2p_ie && hapd->p2p_group) {
3666 struct wpabuf *p2p_resp_ie;
3667 enum p2p_status_code status;
3668 switch (status_code) {
3669 case WLAN_STATUS_SUCCESS:
3670 status = P2P_SC_SUCCESS;
3671 break;
3672 case WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA:
3673 status = P2P_SC_FAIL_LIMIT_REACHED;
3674 break;
3675 default:
3676 status = P2P_SC_FAIL_INVALID_PARAMS;
3677 break;
3678 }
3679 p2p_resp_ie = p2p_group_assoc_resp_ie(hapd->p2p_group, status);
3680 if (p2p_resp_ie) {
3681 os_memcpy(p, wpabuf_head(p2p_resp_ie),
3682 wpabuf_len(p2p_resp_ie));
3683 p += wpabuf_len(p2p_resp_ie);
3684 wpabuf_free(p2p_resp_ie);
3685 }
3686 }
3687 #endif /* CONFIG_P2P */
3688
3689 #ifdef CONFIG_P2P_MANAGER
3690 if (hapd->conf->p2p & P2P_MANAGE)
3691 p = hostapd_eid_p2p_manage(hapd, p);
3692 #endif /* CONFIG_P2P_MANAGER */
3693
3694 p = hostapd_eid_mbo(hapd, p, buf + buflen - p);
3695
3696 if (hapd->conf->assocresp_elements &&
3697 (size_t) (buf + buflen - p) >=
3698 wpabuf_len(hapd->conf->assocresp_elements)) {
3699 os_memcpy(p, wpabuf_head(hapd->conf->assocresp_elements),
3700 wpabuf_len(hapd->conf->assocresp_elements));
3701 p += wpabuf_len(hapd->conf->assocresp_elements);
3702 }
3703
3704 send_len += p - reply->u.assoc_resp.variable;
3705
3706 #ifdef CONFIG_FILS
3707 if (sta &&
3708 (sta->auth_alg == WLAN_AUTH_FILS_SK ||
3709 sta->auth_alg == WLAN_AUTH_FILS_SK_PFS ||
3710 sta->auth_alg == WLAN_AUTH_FILS_PK) &&
3711 status_code == WLAN_STATUS_SUCCESS) {
3712 struct ieee802_11_elems elems;
3713
3714 if (ieee802_11_parse_elems(ies, ies_len, &elems, 0) ==
3715 ParseFailed || !elems.fils_session) {
3716 res = WLAN_STATUS_UNSPECIFIED_FAILURE;
3717 goto done;
3718 }
3719
3720 /* FILS Session */
3721 *p++ = WLAN_EID_EXTENSION; /* Element ID */
3722 *p++ = 1 + FILS_SESSION_LEN; /* Length */
3723 *p++ = WLAN_EID_EXT_FILS_SESSION; /* Element ID Extension */
3724 os_memcpy(p, elems.fils_session, FILS_SESSION_LEN);
3725 send_len += 2 + 1 + FILS_SESSION_LEN;
3726
3727 send_len = fils_encrypt_assoc(sta->wpa_sm, buf, send_len,
3728 buflen, sta->fils_hlp_resp);
3729 if (send_len < 0) {
3730 res = WLAN_STATUS_UNSPECIFIED_FAILURE;
3731 goto done;
3732 }
3733 }
3734 #endif /* CONFIG_FILS */
3735
3736 if (hostapd_drv_send_mlme(hapd, reply, send_len, 0) < 0) {
3737 wpa_printf(MSG_INFO, "Failed to send assoc resp: %s",
3738 strerror(errno));
3739 res = WLAN_STATUS_UNSPECIFIED_FAILURE;
3740 }
3741
3742 done:
3743 os_free(buf);
3744 return res;
3745 }
3746
3747
3748 #ifdef CONFIG_OWE
owe_assoc_req_process(struct hostapd_data * hapd,struct sta_info * sta,const u8 * owe_dh,u8 owe_dh_len,u8 * owe_buf,size_t owe_buf_len,u16 * reason)3749 u8 * owe_assoc_req_process(struct hostapd_data *hapd, struct sta_info *sta,
3750 const u8 *owe_dh, u8 owe_dh_len,
3751 u8 *owe_buf, size_t owe_buf_len, u16 *reason)
3752 {
3753 #ifdef CONFIG_TESTING_OPTIONS
3754 if (hapd->conf->own_ie_override) {
3755 wpa_printf(MSG_DEBUG, "OWE: Using IE override");
3756 *reason = WLAN_STATUS_SUCCESS;
3757 return wpa_auth_write_assoc_resp_owe(sta->wpa_sm, owe_buf,
3758 owe_buf_len, NULL, 0);
3759 }
3760 #endif /* CONFIG_TESTING_OPTIONS */
3761
3762 if (wpa_auth_sta_get_pmksa(sta->wpa_sm)) {
3763 wpa_printf(MSG_DEBUG, "OWE: Using PMKSA caching");
3764 owe_buf = wpa_auth_write_assoc_resp_owe(sta->wpa_sm, owe_buf,
3765 owe_buf_len, NULL, 0);
3766 *reason = WLAN_STATUS_SUCCESS;
3767 return owe_buf;
3768 }
3769
3770 if (sta->owe_pmk && sta->external_dh_updated) {
3771 wpa_printf(MSG_DEBUG, "OWE: Using previously derived PMK");
3772 *reason = WLAN_STATUS_SUCCESS;
3773 return owe_buf;
3774 }
3775
3776 *reason = owe_process_assoc_req(hapd, sta, owe_dh, owe_dh_len);
3777 if (*reason != WLAN_STATUS_SUCCESS)
3778 return NULL;
3779
3780 owe_buf = wpa_auth_write_assoc_resp_owe(sta->wpa_sm, owe_buf,
3781 owe_buf_len, NULL, 0);
3782
3783 if (sta->owe_ecdh && owe_buf) {
3784 struct wpabuf *pub;
3785
3786 pub = crypto_ecdh_get_pubkey(sta->owe_ecdh, 0);
3787 if (!pub) {
3788 *reason = WLAN_STATUS_UNSPECIFIED_FAILURE;
3789 return owe_buf;
3790 }
3791
3792 /* OWE Diffie-Hellman Parameter element */
3793 *owe_buf++ = WLAN_EID_EXTENSION; /* Element ID */
3794 *owe_buf++ = 1 + 2 + wpabuf_len(pub); /* Length */
3795 *owe_buf++ = WLAN_EID_EXT_OWE_DH_PARAM; /* Element ID Extension
3796 */
3797 WPA_PUT_LE16(owe_buf, sta->owe_group);
3798 owe_buf += 2;
3799 os_memcpy(owe_buf, wpabuf_head(pub), wpabuf_len(pub));
3800 owe_buf += wpabuf_len(pub);
3801 wpabuf_free(pub);
3802 }
3803
3804 return owe_buf;
3805 }
3806 #endif /* CONFIG_OWE */
3807
3808
3809 #ifdef CONFIG_FILS
3810
fils_hlp_finish_assoc(struct hostapd_data * hapd,struct sta_info * sta)3811 void fils_hlp_finish_assoc(struct hostapd_data *hapd, struct sta_info *sta)
3812 {
3813 u16 reply_res;
3814
3815 wpa_printf(MSG_DEBUG, "FILS: Finish association with " MACSTR,
3816 MAC2STR(sta->addr));
3817 eloop_cancel_timeout(fils_hlp_timeout, hapd, sta);
3818 if (!sta->fils_pending_assoc_req)
3819 return;
3820 reply_res = send_assoc_resp(hapd, sta, sta->addr, WLAN_STATUS_SUCCESS,
3821 sta->fils_pending_assoc_is_reassoc,
3822 sta->fils_pending_assoc_req,
3823 sta->fils_pending_assoc_req_len, 0);
3824 os_free(sta->fils_pending_assoc_req);
3825 sta->fils_pending_assoc_req = NULL;
3826 sta->fils_pending_assoc_req_len = 0;
3827 wpabuf_free(sta->fils_hlp_resp);
3828 sta->fils_hlp_resp = NULL;
3829 wpabuf_free(sta->hlp_dhcp_discover);
3830 sta->hlp_dhcp_discover = NULL;
3831
3832 /*
3833 * Remove the station in case transmission of a success response fails.
3834 * At this point the station was already added associated to the driver.
3835 */
3836 if (reply_res != WLAN_STATUS_SUCCESS)
3837 hostapd_drv_sta_remove(hapd, sta->addr);
3838 }
3839
3840
fils_hlp_timeout(void * eloop_ctx,void * eloop_data)3841 void fils_hlp_timeout(void *eloop_ctx, void *eloop_data)
3842 {
3843 struct hostapd_data *hapd = eloop_ctx;
3844 struct sta_info *sta = eloop_data;
3845
3846 wpa_printf(MSG_DEBUG,
3847 "FILS: HLP response timeout - continue with association response for "
3848 MACSTR, MAC2STR(sta->addr));
3849 if (sta->fils_drv_assoc_finish)
3850 hostapd_notify_assoc_fils_finish(hapd, sta);
3851 else
3852 fils_hlp_finish_assoc(hapd, sta);
3853 }
3854
3855 #endif /* CONFIG_FILS */
3856
3857
handle_assoc(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len,int reassoc,int rssi)3858 static void handle_assoc(struct hostapd_data *hapd,
3859 const struct ieee80211_mgmt *mgmt, size_t len,
3860 int reassoc, int rssi)
3861 {
3862 u16 capab_info, listen_interval, seq_ctrl, fc;
3863 u16 resp = WLAN_STATUS_SUCCESS, reply_res;
3864 const u8 *pos;
3865 int left, i;
3866 struct sta_info *sta;
3867 u8 *tmp = NULL;
3868 struct hostapd_sta_wpa_psk_short *psk = NULL;
3869 char *identity = NULL;
3870 char *radius_cui = NULL;
3871 #ifdef CONFIG_FILS
3872 int delay_assoc = 0;
3873 #endif /* CONFIG_FILS */
3874
3875 if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_req) :
3876 sizeof(mgmt->u.assoc_req))) {
3877 wpa_printf(MSG_INFO, "handle_assoc(reassoc=%d) - too short payload (len=%lu)",
3878 reassoc, (unsigned long) len);
3879 return;
3880 }
3881
3882 #ifdef CONFIG_TESTING_OPTIONS
3883 if (reassoc) {
3884 if (hapd->iconf->ignore_reassoc_probability > 0.0 &&
3885 drand48() < hapd->iconf->ignore_reassoc_probability) {
3886 wpa_printf(MSG_INFO,
3887 "TESTING: ignoring reassoc request from "
3888 MACSTR, MAC2STR(mgmt->sa));
3889 return;
3890 }
3891 } else {
3892 if (hapd->iconf->ignore_assoc_probability > 0.0 &&
3893 drand48() < hapd->iconf->ignore_assoc_probability) {
3894 wpa_printf(MSG_INFO,
3895 "TESTING: ignoring assoc request from "
3896 MACSTR, MAC2STR(mgmt->sa));
3897 return;
3898 }
3899 }
3900 #endif /* CONFIG_TESTING_OPTIONS */
3901
3902 fc = le_to_host16(mgmt->frame_control);
3903 seq_ctrl = le_to_host16(mgmt->seq_ctrl);
3904
3905 if (reassoc) {
3906 capab_info = le_to_host16(mgmt->u.reassoc_req.capab_info);
3907 listen_interval = le_to_host16(
3908 mgmt->u.reassoc_req.listen_interval);
3909 wpa_printf(MSG_DEBUG, "reassociation request: STA=" MACSTR
3910 " capab_info=0x%02x listen_interval=%d current_ap="
3911 MACSTR " seq_ctrl=0x%x%s",
3912 MAC2STR(mgmt->sa), capab_info, listen_interval,
3913 MAC2STR(mgmt->u.reassoc_req.current_ap),
3914 seq_ctrl, (fc & WLAN_FC_RETRY) ? " retry" : "");
3915 left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.reassoc_req));
3916 pos = mgmt->u.reassoc_req.variable;
3917 } else {
3918 capab_info = le_to_host16(mgmt->u.assoc_req.capab_info);
3919 listen_interval = le_to_host16(
3920 mgmt->u.assoc_req.listen_interval);
3921 wpa_printf(MSG_DEBUG, "association request: STA=" MACSTR
3922 " capab_info=0x%02x listen_interval=%d "
3923 "seq_ctrl=0x%x%s",
3924 MAC2STR(mgmt->sa), capab_info, listen_interval,
3925 seq_ctrl, (fc & WLAN_FC_RETRY) ? " retry" : "");
3926 left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.assoc_req));
3927 pos = mgmt->u.assoc_req.variable;
3928 }
3929
3930 sta = ap_get_sta(hapd, mgmt->sa);
3931 #ifdef CONFIG_IEEE80211R_AP
3932 if (sta && sta->auth_alg == WLAN_AUTH_FT &&
3933 (sta->flags & WLAN_STA_AUTH) == 0) {
3934 wpa_printf(MSG_DEBUG, "FT: Allow STA " MACSTR " to associate "
3935 "prior to authentication since it is using "
3936 "over-the-DS FT", MAC2STR(mgmt->sa));
3937
3938 /*
3939 * Mark station as authenticated, to avoid adding station
3940 * entry in the driver as associated and not authenticated
3941 */
3942 sta->flags |= WLAN_STA_AUTH;
3943 } else
3944 #endif /* CONFIG_IEEE80211R_AP */
3945 if (sta == NULL || (sta->flags & WLAN_STA_AUTH) == 0) {
3946 if (hapd->iface->current_mode &&
3947 hapd->iface->current_mode->mode ==
3948 HOSTAPD_MODE_IEEE80211AD) {
3949 int acl_res;
3950 u32 session_timeout, acct_interim_interval;
3951 struct vlan_description vlan_id;
3952
3953 acl_res = ieee802_11_allowed_address(
3954 hapd, mgmt->sa, (const u8 *) mgmt, len,
3955 &session_timeout, &acct_interim_interval,
3956 &vlan_id, &psk, &identity, &radius_cui, 0);
3957 if (acl_res == HOSTAPD_ACL_REJECT) {
3958 wpa_msg(hapd->msg_ctx, MSG_DEBUG,
3959 "Ignore Association Request frame from "
3960 MACSTR " due to ACL reject",
3961 MAC2STR(mgmt->sa));
3962 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
3963 goto fail;
3964 }
3965 if (acl_res == HOSTAPD_ACL_PENDING)
3966 return;
3967
3968 /* DMG/IEEE 802.11ad does not use authentication.
3969 * Allocate sta entry upon association. */
3970 sta = ap_sta_add(hapd, mgmt->sa);
3971 if (!sta) {
3972 hostapd_logger(hapd, mgmt->sa,
3973 HOSTAPD_MODULE_IEEE80211,
3974 HOSTAPD_LEVEL_INFO,
3975 "Failed to add STA");
3976 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
3977 goto fail;
3978 }
3979
3980 acl_res = ieee802_11_set_radius_info(
3981 hapd, sta, acl_res, session_timeout,
3982 acct_interim_interval, &vlan_id, &psk,
3983 &identity, &radius_cui);
3984 if (acl_res) {
3985 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
3986 goto fail;
3987 }
3988
3989 hostapd_logger(hapd, sta->addr,
3990 HOSTAPD_MODULE_IEEE80211,
3991 HOSTAPD_LEVEL_DEBUG,
3992 "Skip authentication for DMG/IEEE 802.11ad");
3993 sta->flags |= WLAN_STA_AUTH;
3994 wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
3995 sta->auth_alg = WLAN_AUTH_OPEN;
3996 } else {
3997 hostapd_logger(hapd, mgmt->sa,
3998 HOSTAPD_MODULE_IEEE80211,
3999 HOSTAPD_LEVEL_INFO,
4000 "Station tried to associate before authentication (aid=%d flags=0x%x)",
4001 sta ? sta->aid : -1,
4002 sta ? sta->flags : 0);
4003 send_deauth(hapd, mgmt->sa,
4004 WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA);
4005 return;
4006 }
4007 }
4008
4009 if ((fc & WLAN_FC_RETRY) &&
4010 sta->last_seq_ctrl != WLAN_INVALID_MGMT_SEQ &&
4011 sta->last_seq_ctrl == seq_ctrl &&
4012 sta->last_subtype == (reassoc ? WLAN_FC_STYPE_REASSOC_REQ :
4013 WLAN_FC_STYPE_ASSOC_REQ)) {
4014 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
4015 HOSTAPD_LEVEL_DEBUG,
4016 "Drop repeated association frame seq_ctrl=0x%x",
4017 seq_ctrl);
4018 return;
4019 }
4020 sta->last_seq_ctrl = seq_ctrl;
4021 sta->last_subtype = reassoc ? WLAN_FC_STYPE_REASSOC_REQ :
4022 WLAN_FC_STYPE_ASSOC_REQ;
4023
4024 if (hapd->tkip_countermeasures) {
4025 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
4026 goto fail;
4027 }
4028
4029 if (listen_interval > hapd->conf->max_listen_interval) {
4030 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
4031 HOSTAPD_LEVEL_DEBUG,
4032 "Too large Listen Interval (%d)",
4033 listen_interval);
4034 resp = WLAN_STATUS_ASSOC_DENIED_LISTEN_INT_TOO_LARGE;
4035 goto fail;
4036 }
4037
4038 #ifdef CONFIG_MBO
4039 if (hapd->conf->mbo_enabled && hapd->mbo_assoc_disallow) {
4040 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
4041 goto fail;
4042 }
4043
4044 if (hapd->iconf->rssi_reject_assoc_rssi && rssi &&
4045 rssi < hapd->iconf->rssi_reject_assoc_rssi &&
4046 (sta->auth_rssi == 0 ||
4047 sta->auth_rssi < hapd->iconf->rssi_reject_assoc_rssi)) {
4048 resp = WLAN_STATUS_DENIED_POOR_CHANNEL_CONDITIONS;
4049 goto fail;
4050 }
4051 #endif /* CONFIG_MBO */
4052
4053 /*
4054 * sta->capability is used in check_assoc_ies() for RRM enabled
4055 * capability element.
4056 */
4057 sta->capability = capab_info;
4058
4059 #ifdef CONFIG_FILS
4060 if (sta->auth_alg == WLAN_AUTH_FILS_SK ||
4061 sta->auth_alg == WLAN_AUTH_FILS_SK_PFS ||
4062 sta->auth_alg == WLAN_AUTH_FILS_PK) {
4063 int res;
4064
4065 /* The end of the payload is encrypted. Need to decrypt it
4066 * before parsing. */
4067
4068 tmp = os_memdup(pos, left);
4069 if (!tmp) {
4070 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
4071 goto fail;
4072 }
4073
4074 res = fils_decrypt_assoc(sta->wpa_sm, sta->fils_session, mgmt,
4075 len, tmp, left);
4076 if (res < 0) {
4077 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
4078 goto fail;
4079 }
4080 pos = tmp;
4081 left = res;
4082 }
4083 #endif /* CONFIG_FILS */
4084
4085 /* followed by SSID and Supported rates; and HT capabilities if 802.11n
4086 * is used */
4087 resp = check_assoc_ies(hapd, sta, pos, left, reassoc);
4088 if (resp != WLAN_STATUS_SUCCESS)
4089 goto fail;
4090
4091 if (hostapd_get_aid(hapd, sta) < 0) {
4092 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
4093 HOSTAPD_LEVEL_INFO, "No room for more AIDs");
4094 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
4095 goto fail;
4096 }
4097
4098 sta->listen_interval = listen_interval;
4099
4100 if (hapd->iface->current_mode &&
4101 hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
4102 sta->flags |= WLAN_STA_NONERP;
4103 for (i = 0; i < sta->supported_rates_len; i++) {
4104 if ((sta->supported_rates[i] & 0x7f) > 22) {
4105 sta->flags &= ~WLAN_STA_NONERP;
4106 break;
4107 }
4108 }
4109 if (sta->flags & WLAN_STA_NONERP && !sta->nonerp_set) {
4110 sta->nonerp_set = 1;
4111 hapd->iface->num_sta_non_erp++;
4112 if (hapd->iface->num_sta_non_erp == 1)
4113 ieee802_11_set_beacons(hapd->iface);
4114 }
4115
4116 if (!(sta->capability & WLAN_CAPABILITY_SHORT_SLOT_TIME) &&
4117 !sta->no_short_slot_time_set) {
4118 sta->no_short_slot_time_set = 1;
4119 hapd->iface->num_sta_no_short_slot_time++;
4120 if (hapd->iface->current_mode &&
4121 hapd->iface->current_mode->mode ==
4122 HOSTAPD_MODE_IEEE80211G &&
4123 hapd->iface->num_sta_no_short_slot_time == 1)
4124 ieee802_11_set_beacons(hapd->iface);
4125 }
4126
4127 if (sta->capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
4128 sta->flags |= WLAN_STA_SHORT_PREAMBLE;
4129 else
4130 sta->flags &= ~WLAN_STA_SHORT_PREAMBLE;
4131
4132 if (!(sta->capability & WLAN_CAPABILITY_SHORT_PREAMBLE) &&
4133 !sta->no_short_preamble_set) {
4134 sta->no_short_preamble_set = 1;
4135 hapd->iface->num_sta_no_short_preamble++;
4136 if (hapd->iface->current_mode &&
4137 hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G
4138 && hapd->iface->num_sta_no_short_preamble == 1)
4139 ieee802_11_set_beacons(hapd->iface);
4140 }
4141
4142 #ifdef CONFIG_IEEE80211N
4143 update_ht_state(hapd, sta);
4144 #endif /* CONFIG_IEEE80211N */
4145
4146 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
4147 HOSTAPD_LEVEL_DEBUG,
4148 "association OK (aid %d)", sta->aid);
4149 /* Station will be marked associated, after it acknowledges AssocResp
4150 */
4151 sta->flags |= WLAN_STA_ASSOC_REQ_OK;
4152
4153 #ifdef CONFIG_IEEE80211W
4154 if ((sta->flags & WLAN_STA_MFP) && sta->sa_query_timed_out) {
4155 wpa_printf(MSG_DEBUG, "Allowing %sassociation after timed out "
4156 "SA Query procedure", reassoc ? "re" : "");
4157 /* TODO: Send a protected Disassociate frame to the STA using
4158 * the old key and Reason Code "Previous Authentication no
4159 * longer valid". Make sure this is only sent protected since
4160 * unprotected frame would be received by the STA that is now
4161 * trying to associate.
4162 */
4163 }
4164 #endif /* CONFIG_IEEE80211W */
4165
4166 /* Make sure that the previously registered inactivity timer will not
4167 * remove the STA immediately. */
4168 sta->timeout_next = STA_NULLFUNC;
4169
4170 #ifdef CONFIG_TAXONOMY
4171 taxonomy_sta_info_assoc_req(hapd, sta, pos, left);
4172 #endif /* CONFIG_TAXONOMY */
4173
4174 sta->pending_wds_enable = 0;
4175
4176 #ifdef CONFIG_FILS
4177 if (sta->auth_alg == WLAN_AUTH_FILS_SK ||
4178 sta->auth_alg == WLAN_AUTH_FILS_SK_PFS ||
4179 sta->auth_alg == WLAN_AUTH_FILS_PK) {
4180 if (fils_process_hlp(hapd, sta, pos, left) > 0)
4181 delay_assoc = 1;
4182 }
4183 #endif /* CONFIG_FILS */
4184
4185 fail:
4186 os_free(identity);
4187 os_free(radius_cui);
4188 hostapd_free_psk_list(psk);
4189
4190 /*
4191 * In case of a successful response, add the station to the driver.
4192 * Otherwise, the kernel may ignore Data frames before we process the
4193 * ACK frame (TX status). In case of a failure, this station will be
4194 * removed.
4195 *
4196 * Note that this is not compliant with the IEEE 802.11 standard that
4197 * states that a non-AP station should transition into the
4198 * authenticated/associated state only after the station acknowledges
4199 * the (Re)Association Response frame. However, still do this as:
4200 *
4201 * 1. In case the station does not acknowledge the (Re)Association
4202 * Response frame, it will be removed.
4203 * 2. Data frames will be dropped in the kernel until the station is
4204 * set into authorized state, and there are no significant known
4205 * issues with processing other non-Data Class 3 frames during this
4206 * window.
4207 */
4208 if (resp == WLAN_STATUS_SUCCESS && sta &&
4209 add_associated_sta(hapd, sta, reassoc))
4210 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
4211
4212 #ifdef CONFIG_FILS
4213 if (sta && delay_assoc && resp == WLAN_STATUS_SUCCESS &&
4214 eloop_is_timeout_registered(fils_hlp_timeout, hapd, sta) &&
4215 sta->fils_pending_assoc_req) {
4216 /* Do not reschedule fils_hlp_timeout in case the station
4217 * retransmits (Re)Association Request frame while waiting for
4218 * the previously started FILS HLP wait, so that the timeout can
4219 * be determined from the first pending attempt. */
4220 wpa_printf(MSG_DEBUG,
4221 "FILS: Continue waiting for HLP processing before sending (Re)Association Response frame to "
4222 MACSTR, MAC2STR(sta->addr));
4223 os_free(tmp);
4224 return;
4225 }
4226 if (sta) {
4227 eloop_cancel_timeout(fils_hlp_timeout, hapd, sta);
4228 os_free(sta->fils_pending_assoc_req);
4229 sta->fils_pending_assoc_req = NULL;
4230 sta->fils_pending_assoc_req_len = 0;
4231 wpabuf_free(sta->fils_hlp_resp);
4232 sta->fils_hlp_resp = NULL;
4233 }
4234 if (sta && delay_assoc && resp == WLAN_STATUS_SUCCESS) {
4235 sta->fils_pending_assoc_req = tmp;
4236 sta->fils_pending_assoc_req_len = left;
4237 sta->fils_pending_assoc_is_reassoc = reassoc;
4238 sta->fils_drv_assoc_finish = 0;
4239 wpa_printf(MSG_DEBUG,
4240 "FILS: Waiting for HLP processing before sending (Re)Association Response frame to "
4241 MACSTR, MAC2STR(sta->addr));
4242 eloop_cancel_timeout(fils_hlp_timeout, hapd, sta);
4243 eloop_register_timeout(0, hapd->conf->fils_hlp_wait_time * 1024,
4244 fils_hlp_timeout, hapd, sta);
4245 return;
4246 }
4247 #endif /* CONFIG_FILS */
4248
4249 reply_res = send_assoc_resp(hapd, sta, mgmt->sa, resp, reassoc, pos,
4250 left, rssi);
4251 os_free(tmp);
4252
4253 /*
4254 * Remove the station in case tranmission of a success response fails
4255 * (the STA was added associated to the driver) or if the station was
4256 * previously added unassociated.
4257 */
4258 if (sta && ((reply_res != WLAN_STATUS_SUCCESS &&
4259 resp == WLAN_STATUS_SUCCESS) || sta->added_unassoc)) {
4260 hostapd_drv_sta_remove(hapd, sta->addr);
4261 sta->added_unassoc = 0;
4262 }
4263 }
4264
4265
handle_disassoc(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len)4266 static void handle_disassoc(struct hostapd_data *hapd,
4267 const struct ieee80211_mgmt *mgmt, size_t len)
4268 {
4269 struct sta_info *sta;
4270
4271 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.disassoc)) {
4272 wpa_printf(MSG_INFO, "handle_disassoc - too short payload (len=%lu)",
4273 (unsigned long) len);
4274 return;
4275 }
4276
4277 wpa_printf(MSG_DEBUG, "disassocation: STA=" MACSTR " reason_code=%d",
4278 MAC2STR(mgmt->sa),
4279 le_to_host16(mgmt->u.disassoc.reason_code));
4280
4281 sta = ap_get_sta(hapd, mgmt->sa);
4282 if (sta == NULL) {
4283 wpa_printf(MSG_INFO, "Station " MACSTR " trying to disassociate, but it is not associated",
4284 MAC2STR(mgmt->sa));
4285 return;
4286 }
4287
4288 ap_sta_set_authorized(hapd, sta, 0);
4289 sta->last_seq_ctrl = WLAN_INVALID_MGMT_SEQ;
4290 sta->flags &= ~(WLAN_STA_ASSOC | WLAN_STA_ASSOC_REQ_OK);
4291 wpa_auth_sm_event(sta->wpa_sm, WPA_DISASSOC);
4292 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
4293 HOSTAPD_LEVEL_INFO, "disassociated");
4294 sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
4295 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
4296 /* Stop Accounting and IEEE 802.1X sessions, but leave the STA
4297 * authenticated. */
4298 accounting_sta_stop(hapd, sta);
4299 ieee802_1x_free_station(hapd, sta);
4300 if (sta->ipaddr)
4301 hostapd_drv_br_delete_ip_neigh(hapd, 4, (u8 *) &sta->ipaddr);
4302 ap_sta_ip6addr_del(hapd, sta);
4303 hostapd_drv_sta_remove(hapd, sta->addr);
4304 sta->added_unassoc = 0;
4305
4306 if (sta->timeout_next == STA_NULLFUNC ||
4307 sta->timeout_next == STA_DISASSOC) {
4308 sta->timeout_next = STA_DEAUTH;
4309 eloop_cancel_timeout(ap_handle_timer, hapd, sta);
4310 eloop_register_timeout(AP_DEAUTH_DELAY, 0, ap_handle_timer,
4311 hapd, sta);
4312 }
4313
4314 mlme_disassociate_indication(
4315 hapd, sta, le_to_host16(mgmt->u.disassoc.reason_code));
4316
4317 /* DMG/IEEE 802.11ad does not use deauthication. Deallocate sta upon
4318 * disassociation. */
4319 if (hapd->iface->current_mode &&
4320 hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211AD) {
4321 sta->flags &= ~WLAN_STA_AUTH;
4322 wpa_auth_sm_event(sta->wpa_sm, WPA_DEAUTH);
4323 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
4324 HOSTAPD_LEVEL_DEBUG, "deauthenticated");
4325 ap_free_sta(hapd, sta);
4326 }
4327 }
4328
4329
handle_deauth(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len)4330 static void handle_deauth(struct hostapd_data *hapd,
4331 const struct ieee80211_mgmt *mgmt, size_t len)
4332 {
4333 struct sta_info *sta;
4334
4335 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.deauth)) {
4336 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "handle_deauth - too short "
4337 "payload (len=%lu)", (unsigned long) len);
4338 return;
4339 }
4340
4341 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "deauthentication: STA=" MACSTR
4342 " reason_code=%d",
4343 MAC2STR(mgmt->sa), le_to_host16(mgmt->u.deauth.reason_code));
4344
4345 sta = ap_get_sta(hapd, mgmt->sa);
4346 if (sta == NULL) {
4347 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "Station " MACSTR " trying "
4348 "to deauthenticate, but it is not authenticated",
4349 MAC2STR(mgmt->sa));
4350 return;
4351 }
4352
4353 ap_sta_set_authorized(hapd, sta, 0);
4354 sta->last_seq_ctrl = WLAN_INVALID_MGMT_SEQ;
4355 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC |
4356 WLAN_STA_ASSOC_REQ_OK);
4357 wpa_auth_sm_event(sta->wpa_sm, WPA_DEAUTH);
4358 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
4359 HOSTAPD_LEVEL_DEBUG, "deauthenticated");
4360 mlme_deauthenticate_indication(
4361 hapd, sta, le_to_host16(mgmt->u.deauth.reason_code));
4362 sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
4363 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
4364 ap_free_sta(hapd, sta);
4365 }
4366
4367
handle_beacon(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len,struct hostapd_frame_info * fi)4368 static void handle_beacon(struct hostapd_data *hapd,
4369 const struct ieee80211_mgmt *mgmt, size_t len,
4370 struct hostapd_frame_info *fi)
4371 {
4372 struct ieee802_11_elems elems;
4373
4374 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.beacon)) {
4375 wpa_printf(MSG_INFO, "handle_beacon - too short payload (len=%lu)",
4376 (unsigned long) len);
4377 return;
4378 }
4379
4380 (void) ieee802_11_parse_elems(mgmt->u.beacon.variable,
4381 len - (IEEE80211_HDRLEN +
4382 sizeof(mgmt->u.beacon)), &elems,
4383 0);
4384
4385 ap_list_process_beacon(hapd->iface, mgmt, &elems, fi);
4386 }
4387
4388
4389 #ifdef CONFIG_IEEE80211W
robust_action_frame(u8 category)4390 static int robust_action_frame(u8 category)
4391 {
4392 return category != WLAN_ACTION_PUBLIC &&
4393 category != WLAN_ACTION_HT;
4394 }
4395 #endif /* CONFIG_IEEE80211W */
4396
4397
handle_action(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len,unsigned int freq)4398 static int handle_action(struct hostapd_data *hapd,
4399 const struct ieee80211_mgmt *mgmt, size_t len,
4400 unsigned int freq)
4401 {
4402 struct sta_info *sta;
4403 u8 *action __maybe_unused;
4404
4405 if (len < IEEE80211_HDRLEN + 2 + 1) {
4406 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
4407 HOSTAPD_LEVEL_DEBUG,
4408 "handle_action - too short payload (len=%lu)",
4409 (unsigned long) len);
4410 return 0;
4411 }
4412
4413 action = (u8 *) &mgmt->u.action.u;
4414 wpa_printf(MSG_DEBUG, "RX_ACTION category %u action %u sa " MACSTR
4415 " da " MACSTR " len %d freq %u",
4416 mgmt->u.action.category, *action,
4417 MAC2STR(mgmt->sa), MAC2STR(mgmt->da), (int) len, freq);
4418
4419 sta = ap_get_sta(hapd, mgmt->sa);
4420
4421 if (mgmt->u.action.category != WLAN_ACTION_PUBLIC &&
4422 (sta == NULL || !(sta->flags & WLAN_STA_ASSOC))) {
4423 wpa_printf(MSG_DEBUG, "IEEE 802.11: Ignored Action "
4424 "frame (category=%u) from unassociated STA " MACSTR,
4425 mgmt->u.action.category, MAC2STR(mgmt->sa));
4426 return 0;
4427 }
4428
4429 #ifdef CONFIG_IEEE80211W
4430 if (sta && (sta->flags & WLAN_STA_MFP) &&
4431 !(mgmt->frame_control & host_to_le16(WLAN_FC_ISWEP)) &&
4432 robust_action_frame(mgmt->u.action.category)) {
4433 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
4434 HOSTAPD_LEVEL_DEBUG,
4435 "Dropped unprotected Robust Action frame from "
4436 "an MFP STA");
4437 return 0;
4438 }
4439 #endif /* CONFIG_IEEE80211W */
4440
4441 if (sta) {
4442 u16 fc = le_to_host16(mgmt->frame_control);
4443 u16 seq_ctrl = le_to_host16(mgmt->seq_ctrl);
4444
4445 if ((fc & WLAN_FC_RETRY) &&
4446 sta->last_seq_ctrl != WLAN_INVALID_MGMT_SEQ &&
4447 sta->last_seq_ctrl == seq_ctrl &&
4448 sta->last_subtype == WLAN_FC_STYPE_ACTION) {
4449 hostapd_logger(hapd, sta->addr,
4450 HOSTAPD_MODULE_IEEE80211,
4451 HOSTAPD_LEVEL_DEBUG,
4452 "Drop repeated action frame seq_ctrl=0x%x",
4453 seq_ctrl);
4454 return 1;
4455 }
4456
4457 sta->last_seq_ctrl = seq_ctrl;
4458 sta->last_subtype = WLAN_FC_STYPE_ACTION;
4459 }
4460
4461 switch (mgmt->u.action.category) {
4462 #ifdef CONFIG_IEEE80211R_AP
4463 case WLAN_ACTION_FT:
4464 if (!sta ||
4465 wpa_ft_action_rx(sta->wpa_sm, (u8 *) &mgmt->u.action,
4466 len - IEEE80211_HDRLEN))
4467 break;
4468 return 1;
4469 #endif /* CONFIG_IEEE80211R_AP */
4470 case WLAN_ACTION_WMM:
4471 hostapd_wmm_action(hapd, mgmt, len);
4472 return 1;
4473 #ifdef CONFIG_IEEE80211W
4474 case WLAN_ACTION_SA_QUERY:
4475 ieee802_11_sa_query_action(hapd, mgmt, len);
4476 return 1;
4477 #endif /* CONFIG_IEEE80211W */
4478 #ifdef CONFIG_WNM_AP
4479 case WLAN_ACTION_WNM:
4480 ieee802_11_rx_wnm_action_ap(hapd, mgmt, len);
4481 return 1;
4482 #endif /* CONFIG_WNM_AP */
4483 #ifdef CONFIG_FST
4484 case WLAN_ACTION_FST:
4485 if (hapd->iface->fst)
4486 fst_rx_action(hapd->iface->fst, mgmt, len);
4487 else
4488 wpa_printf(MSG_DEBUG,
4489 "FST: Ignore FST Action frame - no FST attached");
4490 return 1;
4491 #endif /* CONFIG_FST */
4492 case WLAN_ACTION_PUBLIC:
4493 case WLAN_ACTION_PROTECTED_DUAL:
4494 #ifdef CONFIG_IEEE80211N
4495 if (len >= IEEE80211_HDRLEN + 2 &&
4496 mgmt->u.action.u.public_action.action ==
4497 WLAN_PA_20_40_BSS_COEX) {
4498 hostapd_2040_coex_action(hapd, mgmt, len);
4499 return 1;
4500 }
4501 #endif /* CONFIG_IEEE80211N */
4502 #ifdef CONFIG_DPP
4503 if (len >= IEEE80211_HDRLEN + 6 &&
4504 mgmt->u.action.u.vs_public_action.action ==
4505 WLAN_PA_VENDOR_SPECIFIC &&
4506 WPA_GET_BE24(mgmt->u.action.u.vs_public_action.oui) ==
4507 OUI_WFA &&
4508 mgmt->u.action.u.vs_public_action.variable[0] ==
4509 DPP_OUI_TYPE) {
4510 const u8 *pos, *end;
4511
4512 pos = mgmt->u.action.u.vs_public_action.oui;
4513 end = ((const u8 *) mgmt) + len;
4514 hostapd_dpp_rx_action(hapd, mgmt->sa, pos, end - pos,
4515 freq);
4516 return 1;
4517 }
4518 if (len >= IEEE80211_HDRLEN + 2 &&
4519 (mgmt->u.action.u.public_action.action ==
4520 WLAN_PA_GAS_INITIAL_RESP ||
4521 mgmt->u.action.u.public_action.action ==
4522 WLAN_PA_GAS_COMEBACK_RESP)) {
4523 const u8 *pos, *end;
4524
4525 pos = &mgmt->u.action.u.public_action.action;
4526 end = ((const u8 *) mgmt) + len;
4527 gas_query_ap_rx(hapd->gas, mgmt->sa,
4528 mgmt->u.action.category,
4529 pos, end - pos, hapd->iface->freq);
4530 return 1;
4531 }
4532 #endif /* CONFIG_DPP */
4533 if (hapd->public_action_cb) {
4534 hapd->public_action_cb(hapd->public_action_cb_ctx,
4535 (u8 *) mgmt, len,
4536 hapd->iface->freq);
4537 }
4538 if (hapd->public_action_cb2) {
4539 hapd->public_action_cb2(hapd->public_action_cb2_ctx,
4540 (u8 *) mgmt, len,
4541 hapd->iface->freq);
4542 }
4543 if (hapd->public_action_cb || hapd->public_action_cb2)
4544 return 1;
4545 break;
4546 case WLAN_ACTION_VENDOR_SPECIFIC:
4547 if (hapd->vendor_action_cb) {
4548 if (hapd->vendor_action_cb(hapd->vendor_action_cb_ctx,
4549 (u8 *) mgmt, len,
4550 hapd->iface->freq) == 0)
4551 return 1;
4552 }
4553 break;
4554 case WLAN_ACTION_RADIO_MEASUREMENT:
4555 hostapd_handle_radio_measurement(hapd, (const u8 *) mgmt, len);
4556 return 1;
4557 }
4558
4559 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
4560 HOSTAPD_LEVEL_DEBUG,
4561 "handle_action - unknown action category %d or invalid "
4562 "frame",
4563 mgmt->u.action.category);
4564 if (!is_multicast_ether_addr(mgmt->da) &&
4565 !(mgmt->u.action.category & 0x80) &&
4566 !is_multicast_ether_addr(mgmt->sa)) {
4567 struct ieee80211_mgmt *resp;
4568
4569 /*
4570 * IEEE 802.11-REVma/D9.0 - 7.3.1.11
4571 * Return the Action frame to the source without change
4572 * except that MSB of the Category set to 1.
4573 */
4574 wpa_printf(MSG_DEBUG, "IEEE 802.11: Return unknown Action "
4575 "frame back to sender");
4576 resp = os_memdup(mgmt, len);
4577 if (resp == NULL)
4578 return 0;
4579 os_memcpy(resp->da, resp->sa, ETH_ALEN);
4580 os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN);
4581 os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN);
4582 resp->u.action.category |= 0x80;
4583
4584 if (hostapd_drv_send_mlme(hapd, resp, len, 0) < 0) {
4585 wpa_printf(MSG_ERROR, "IEEE 802.11: Failed to send "
4586 "Action frame");
4587 }
4588 os_free(resp);
4589 }
4590
4591 return 1;
4592 }
4593
4594
4595 /**
4596 * ieee802_11_mgmt - process incoming IEEE 802.11 management frames
4597 * @hapd: hostapd BSS data structure (the BSS to which the management frame was
4598 * sent to)
4599 * @buf: management frame data (starting from IEEE 802.11 header)
4600 * @len: length of frame data in octets
4601 * @fi: meta data about received frame (signal level, etc.)
4602 *
4603 * Process all incoming IEEE 802.11 management frames. This will be called for
4604 * each frame received from the kernel driver through wlan#ap interface. In
4605 * addition, it can be called to re-inserted pending frames (e.g., when using
4606 * external RADIUS server as an MAC ACL).
4607 */
ieee802_11_mgmt(struct hostapd_data * hapd,const u8 * buf,size_t len,struct hostapd_frame_info * fi)4608 int ieee802_11_mgmt(struct hostapd_data *hapd, const u8 *buf, size_t len,
4609 struct hostapd_frame_info *fi)
4610 {
4611 struct ieee80211_mgmt *mgmt;
4612 u16 fc, stype;
4613 int ret = 0;
4614 unsigned int freq;
4615 int ssi_signal = fi ? fi->ssi_signal : 0;
4616
4617 if (len < 24)
4618 return 0;
4619
4620 if (fi && fi->freq)
4621 freq = fi->freq;
4622 else
4623 freq = hapd->iface->freq;
4624
4625 mgmt = (struct ieee80211_mgmt *) buf;
4626 fc = le_to_host16(mgmt->frame_control);
4627 stype = WLAN_FC_GET_STYPE(fc);
4628
4629 if (stype == WLAN_FC_STYPE_BEACON) {
4630 handle_beacon(hapd, mgmt, len, fi);
4631 return 1;
4632 }
4633
4634 if (!is_broadcast_ether_addr(mgmt->bssid) &&
4635 #ifdef CONFIG_P2P
4636 /* Invitation responses can be sent with the peer MAC as BSSID */
4637 !((hapd->conf->p2p & P2P_GROUP_OWNER) &&
4638 stype == WLAN_FC_STYPE_ACTION) &&
4639 #endif /* CONFIG_P2P */
4640 #ifdef CONFIG_MESH
4641 !(hapd->conf->mesh & MESH_ENABLED) &&
4642 #endif /* CONFIG_MESH */
4643 os_memcmp(mgmt->bssid, hapd->own_addr, ETH_ALEN) != 0) {
4644 wpa_printf(MSG_INFO, "MGMT: BSSID=" MACSTR " not our address",
4645 MAC2STR(mgmt->bssid));
4646 return 0;
4647 }
4648
4649
4650 if (stype == WLAN_FC_STYPE_PROBE_REQ) {
4651 handle_probe_req(hapd, mgmt, len, ssi_signal);
4652 return 1;
4653 }
4654
4655 if ((!is_broadcast_ether_addr(mgmt->da) ||
4656 stype != WLAN_FC_STYPE_ACTION) &&
4657 os_memcmp(mgmt->da, hapd->own_addr, ETH_ALEN) != 0) {
4658 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
4659 HOSTAPD_LEVEL_DEBUG,
4660 "MGMT: DA=" MACSTR " not our address",
4661 MAC2STR(mgmt->da));
4662 return 0;
4663 }
4664
4665 if (hapd->iconf->track_sta_max_num)
4666 sta_track_add(hapd->iface, mgmt->sa, ssi_signal);
4667
4668 switch (stype) {
4669 case WLAN_FC_STYPE_AUTH:
4670 wpa_printf(MSG_DEBUG, "mgmt::auth");
4671 handle_auth(hapd, mgmt, len, ssi_signal, 0);
4672 ret = 1;
4673 break;
4674 case WLAN_FC_STYPE_ASSOC_REQ:
4675 wpa_printf(MSG_DEBUG, "mgmt::assoc_req");
4676 handle_assoc(hapd, mgmt, len, 0, ssi_signal);
4677 ret = 1;
4678 break;
4679 case WLAN_FC_STYPE_REASSOC_REQ:
4680 wpa_printf(MSG_DEBUG, "mgmt::reassoc_req");
4681 handle_assoc(hapd, mgmt, len, 1, ssi_signal);
4682 ret = 1;
4683 break;
4684 case WLAN_FC_STYPE_DISASSOC:
4685 wpa_printf(MSG_DEBUG, "mgmt::disassoc");
4686 handle_disassoc(hapd, mgmt, len);
4687 ret = 1;
4688 break;
4689 case WLAN_FC_STYPE_DEAUTH:
4690 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "mgmt::deauth");
4691 handle_deauth(hapd, mgmt, len);
4692 ret = 1;
4693 break;
4694 case WLAN_FC_STYPE_ACTION:
4695 wpa_printf(MSG_DEBUG, "mgmt::action");
4696 ret = handle_action(hapd, mgmt, len, freq);
4697 break;
4698 default:
4699 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
4700 HOSTAPD_LEVEL_DEBUG,
4701 "unknown mgmt frame subtype %d", stype);
4702 break;
4703 }
4704
4705 return ret;
4706 }
4707
4708
handle_auth_cb(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len,int ok)4709 static void handle_auth_cb(struct hostapd_data *hapd,
4710 const struct ieee80211_mgmt *mgmt,
4711 size_t len, int ok)
4712 {
4713 u16 auth_alg, auth_transaction, status_code;
4714 struct sta_info *sta;
4715
4716 sta = ap_get_sta(hapd, mgmt->da);
4717 if (!sta) {
4718 wpa_printf(MSG_DEBUG, "handle_auth_cb: STA " MACSTR
4719 " not found",
4720 MAC2STR(mgmt->da));
4721 return;
4722 }
4723
4724 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
4725 auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction);
4726 status_code = le_to_host16(mgmt->u.auth.status_code);
4727
4728 if (!ok) {
4729 hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211,
4730 HOSTAPD_LEVEL_NOTICE,
4731 "did not acknowledge authentication response");
4732 goto fail;
4733 }
4734
4735 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) {
4736 wpa_printf(MSG_INFO, "handle_auth_cb - too short payload (len=%lu)",
4737 (unsigned long) len);
4738 goto fail;
4739 }
4740
4741 if (status_code == WLAN_STATUS_SUCCESS &&
4742 ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 2) ||
4743 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 4))) {
4744 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
4745 HOSTAPD_LEVEL_INFO, "authenticated");
4746 sta->flags |= WLAN_STA_AUTH;
4747 if (sta->added_unassoc)
4748 hostapd_set_sta_flags(hapd, sta);
4749 return;
4750 }
4751
4752 fail:
4753 if (status_code != WLAN_STATUS_SUCCESS && sta->added_unassoc) {
4754 hostapd_drv_sta_remove(hapd, sta->addr);
4755 sta->added_unassoc = 0;
4756 }
4757 }
4758
4759
hostapd_set_wds_encryption(struct hostapd_data * hapd,struct sta_info * sta,char * ifname_wds)4760 static void hostapd_set_wds_encryption(struct hostapd_data *hapd,
4761 struct sta_info *sta,
4762 char *ifname_wds)
4763 {
4764 int i;
4765 struct hostapd_ssid *ssid = &hapd->conf->ssid;
4766
4767 if (hapd->conf->ieee802_1x || hapd->conf->wpa)
4768 return;
4769
4770 for (i = 0; i < 4; i++) {
4771 if (ssid->wep.key[i] &&
4772 hostapd_drv_set_key(ifname_wds, hapd, WPA_ALG_WEP, NULL, i,
4773 i == ssid->wep.idx, NULL, 0,
4774 ssid->wep.key[i], ssid->wep.len[i])) {
4775 wpa_printf(MSG_WARNING,
4776 "Could not set WEP keys for WDS interface; %s",
4777 ifname_wds);
4778 break;
4779 }
4780 }
4781 }
4782
4783
handle_assoc_cb(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len,int reassoc,int ok)4784 static void handle_assoc_cb(struct hostapd_data *hapd,
4785 const struct ieee80211_mgmt *mgmt,
4786 size_t len, int reassoc, int ok)
4787 {
4788 u16 status;
4789 struct sta_info *sta;
4790 int new_assoc = 1;
4791
4792 sta = ap_get_sta(hapd, mgmt->da);
4793 if (!sta) {
4794 wpa_printf(MSG_INFO, "handle_assoc_cb: STA " MACSTR " not found",
4795 MAC2STR(mgmt->da));
4796 return;
4797 }
4798
4799 if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_resp) :
4800 sizeof(mgmt->u.assoc_resp))) {
4801 wpa_printf(MSG_INFO,
4802 "handle_assoc_cb(reassoc=%d) - too short payload (len=%lu)",
4803 reassoc, (unsigned long) len);
4804 hostapd_drv_sta_remove(hapd, sta->addr);
4805 return;
4806 }
4807
4808 if (reassoc)
4809 status = le_to_host16(mgmt->u.reassoc_resp.status_code);
4810 else
4811 status = le_to_host16(mgmt->u.assoc_resp.status_code);
4812
4813 if (!ok) {
4814 hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211,
4815 HOSTAPD_LEVEL_DEBUG,
4816 "did not acknowledge association response");
4817 sta->flags &= ~WLAN_STA_ASSOC_REQ_OK;
4818 /* The STA is added only in case of SUCCESS */
4819 if (status == WLAN_STATUS_SUCCESS)
4820 hostapd_drv_sta_remove(hapd, sta->addr);
4821
4822 return;
4823 }
4824
4825 if (status != WLAN_STATUS_SUCCESS)
4826 return;
4827
4828 /* Stop previous accounting session, if one is started, and allocate
4829 * new session id for the new session. */
4830 accounting_sta_stop(hapd, sta);
4831
4832 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
4833 HOSTAPD_LEVEL_INFO,
4834 "associated (aid %d)",
4835 sta->aid);
4836
4837 if (sta->flags & WLAN_STA_ASSOC)
4838 new_assoc = 0;
4839 sta->flags |= WLAN_STA_ASSOC;
4840 sta->flags &= ~WLAN_STA_WNM_SLEEP_MODE;
4841 if ((!hapd->conf->ieee802_1x && !hapd->conf->wpa &&
4842 !hapd->conf->osen) ||
4843 sta->auth_alg == WLAN_AUTH_FILS_SK ||
4844 sta->auth_alg == WLAN_AUTH_FILS_SK_PFS ||
4845 sta->auth_alg == WLAN_AUTH_FILS_PK ||
4846 sta->auth_alg == WLAN_AUTH_FT) {
4847 /*
4848 * Open, static WEP, FT protocol, or FILS; no separate
4849 * authorization step.
4850 */
4851 ap_sta_set_authorized(hapd, sta, 1);
4852 }
4853
4854 if (reassoc)
4855 mlme_reassociate_indication(hapd, sta);
4856 else
4857 mlme_associate_indication(hapd, sta);
4858
4859 #ifdef CONFIG_IEEE80211W
4860 sta->sa_query_timed_out = 0;
4861 #endif /* CONFIG_IEEE80211W */
4862
4863 if (sta->eapol_sm == NULL) {
4864 /*
4865 * This STA does not use RADIUS server for EAP authentication,
4866 * so bind it to the selected VLAN interface now, since the
4867 * interface selection is not going to change anymore.
4868 */
4869 if (ap_sta_bind_vlan(hapd, sta) < 0)
4870 return;
4871 } else if (sta->vlan_id) {
4872 /* VLAN ID already set (e.g., by PMKSA caching), so bind STA */
4873 if (ap_sta_bind_vlan(hapd, sta) < 0)
4874 return;
4875 }
4876
4877 hostapd_set_sta_flags(hapd, sta);
4878
4879 if (!(sta->flags & WLAN_STA_WDS) && sta->pending_wds_enable) {
4880 wpa_printf(MSG_DEBUG, "Enable 4-address WDS mode for STA "
4881 MACSTR " based on pending request",
4882 MAC2STR(sta->addr));
4883 sta->pending_wds_enable = 0;
4884 sta->flags |= WLAN_STA_WDS;
4885 }
4886
4887 if (sta->flags & (WLAN_STA_WDS | WLAN_STA_MULTI_AP)) {
4888 int ret;
4889 char ifname_wds[IFNAMSIZ + 1];
4890
4891 wpa_printf(MSG_DEBUG, "Reenable 4-address WDS mode for STA "
4892 MACSTR " (aid %u)",
4893 MAC2STR(sta->addr), sta->aid);
4894 ret = hostapd_set_wds_sta(hapd, ifname_wds, sta->addr,
4895 sta->aid, 1);
4896 if (!ret)
4897 hostapd_set_wds_encryption(hapd, sta, ifname_wds);
4898 }
4899
4900 if (sta->auth_alg == WLAN_AUTH_FT)
4901 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC_FT);
4902 else
4903 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC);
4904 hapd->new_assoc_sta_cb(hapd, sta, !new_assoc);
4905 ieee802_1x_notify_port_enabled(sta->eapol_sm, 1);
4906
4907 #ifdef CONFIG_FILS
4908 if ((sta->auth_alg == WLAN_AUTH_FILS_SK ||
4909 sta->auth_alg == WLAN_AUTH_FILS_SK_PFS ||
4910 sta->auth_alg == WLAN_AUTH_FILS_PK) &&
4911 fils_set_tk(sta->wpa_sm) < 0) {
4912 wpa_printf(MSG_DEBUG, "FILS: TK configuration failed");
4913 ap_sta_disconnect(hapd, sta, sta->addr,
4914 WLAN_REASON_UNSPECIFIED);
4915 return;
4916 }
4917 #endif /* CONFIG_FILS */
4918
4919 if (sta->pending_eapol_rx) {
4920 struct os_reltime now, age;
4921
4922 os_get_reltime(&now);
4923 os_reltime_sub(&now, &sta->pending_eapol_rx->rx_time, &age);
4924 if (age.sec == 0 && age.usec < 200000) {
4925 wpa_printf(MSG_DEBUG,
4926 "Process pending EAPOL frame that was received from " MACSTR " just before association notification",
4927 MAC2STR(sta->addr));
4928 ieee802_1x_receive(
4929 hapd, mgmt->da,
4930 wpabuf_head(sta->pending_eapol_rx->buf),
4931 wpabuf_len(sta->pending_eapol_rx->buf));
4932 }
4933 wpabuf_free(sta->pending_eapol_rx->buf);
4934 os_free(sta->pending_eapol_rx);
4935 sta->pending_eapol_rx = NULL;
4936 }
4937 }
4938
4939
handle_deauth_cb(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len,int ok)4940 static void handle_deauth_cb(struct hostapd_data *hapd,
4941 const struct ieee80211_mgmt *mgmt,
4942 size_t len, int ok)
4943 {
4944 struct sta_info *sta;
4945 if (is_multicast_ether_addr(mgmt->da))
4946 return;
4947 sta = ap_get_sta(hapd, mgmt->da);
4948 if (!sta) {
4949 wpa_printf(MSG_DEBUG, "handle_deauth_cb: STA " MACSTR
4950 " not found", MAC2STR(mgmt->da));
4951 return;
4952 }
4953 if (ok)
4954 wpa_printf(MSG_DEBUG, "STA " MACSTR " acknowledged deauth",
4955 MAC2STR(sta->addr));
4956 else
4957 wpa_printf(MSG_DEBUG, "STA " MACSTR " did not acknowledge "
4958 "deauth", MAC2STR(sta->addr));
4959
4960 ap_sta_deauth_cb(hapd, sta);
4961 }
4962
4963
handle_disassoc_cb(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len,int ok)4964 static void handle_disassoc_cb(struct hostapd_data *hapd,
4965 const struct ieee80211_mgmt *mgmt,
4966 size_t len, int ok)
4967 {
4968 struct sta_info *sta;
4969 if (is_multicast_ether_addr(mgmt->da))
4970 return;
4971 sta = ap_get_sta(hapd, mgmt->da);
4972 if (!sta) {
4973 wpa_printf(MSG_DEBUG, "handle_disassoc_cb: STA " MACSTR
4974 " not found", MAC2STR(mgmt->da));
4975 return;
4976 }
4977 if (ok)
4978 wpa_printf(MSG_DEBUG, "STA " MACSTR " acknowledged disassoc",
4979 MAC2STR(sta->addr));
4980 else
4981 wpa_printf(MSG_DEBUG, "STA " MACSTR " did not acknowledge "
4982 "disassoc", MAC2STR(sta->addr));
4983
4984 ap_sta_disassoc_cb(hapd, sta);
4985 }
4986
4987
handle_action_cb(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len,int ok)4988 static void handle_action_cb(struct hostapd_data *hapd,
4989 const struct ieee80211_mgmt *mgmt,
4990 size_t len, int ok)
4991 {
4992 struct sta_info *sta;
4993 const struct rrm_measurement_report_element *report;
4994
4995 if (is_multicast_ether_addr(mgmt->da))
4996 return;
4997 #ifdef CONFIG_DPP
4998 if (len >= IEEE80211_HDRLEN + 6 &&
4999 mgmt->u.action.category == WLAN_ACTION_PUBLIC &&
5000 mgmt->u.action.u.vs_public_action.action ==
5001 WLAN_PA_VENDOR_SPECIFIC &&
5002 WPA_GET_BE24(mgmt->u.action.u.vs_public_action.oui) ==
5003 OUI_WFA &&
5004 mgmt->u.action.u.vs_public_action.variable[0] ==
5005 DPP_OUI_TYPE) {
5006 const u8 *pos, *end;
5007
5008 pos = &mgmt->u.action.u.vs_public_action.variable[1];
5009 end = ((const u8 *) mgmt) + len;
5010 hostapd_dpp_tx_status(hapd, mgmt->da, pos, end - pos, ok);
5011 return;
5012 }
5013 if (len >= IEEE80211_HDRLEN + 2 &&
5014 mgmt->u.action.category == WLAN_ACTION_PUBLIC &&
5015 (mgmt->u.action.u.public_action.action ==
5016 WLAN_PA_GAS_INITIAL_REQ ||
5017 mgmt->u.action.u.public_action.action ==
5018 WLAN_PA_GAS_COMEBACK_REQ)) {
5019 const u8 *pos, *end;
5020
5021 pos = mgmt->u.action.u.public_action.variable;
5022 end = ((const u8 *) mgmt) + len;
5023 gas_query_ap_tx_status(hapd->gas, mgmt->da, pos, end - pos, ok);
5024 return;
5025 }
5026 #endif /* CONFIG_DPP */
5027 sta = ap_get_sta(hapd, mgmt->da);
5028 if (!sta) {
5029 wpa_printf(MSG_DEBUG, "handle_action_cb: STA " MACSTR
5030 " not found", MAC2STR(mgmt->da));
5031 return;
5032 }
5033
5034 if (len < 24 + 5 + sizeof(*report))
5035 return;
5036 report = (const struct rrm_measurement_report_element *)
5037 &mgmt->u.action.u.rrm.variable[2];
5038 if (mgmt->u.action.category == WLAN_ACTION_RADIO_MEASUREMENT &&
5039 mgmt->u.action.u.rrm.action == WLAN_RRM_RADIO_MEASUREMENT_REQUEST &&
5040 report->eid == WLAN_EID_MEASURE_REQUEST &&
5041 report->len >= 3 &&
5042 report->type == MEASURE_TYPE_BEACON)
5043 hostapd_rrm_beacon_req_tx_status(hapd, mgmt, len, ok);
5044 }
5045
5046
5047 /**
5048 * ieee802_11_mgmt_cb - Process management frame TX status callback
5049 * @hapd: hostapd BSS data structure (the BSS from which the management frame
5050 * was sent from)
5051 * @buf: management frame data (starting from IEEE 802.11 header)
5052 * @len: length of frame data in octets
5053 * @stype: management frame subtype from frame control field
5054 * @ok: Whether the frame was ACK'ed
5055 */
ieee802_11_mgmt_cb(struct hostapd_data * hapd,const u8 * buf,size_t len,u16 stype,int ok)5056 void ieee802_11_mgmt_cb(struct hostapd_data *hapd, const u8 *buf, size_t len,
5057 u16 stype, int ok)
5058 {
5059 const struct ieee80211_mgmt *mgmt;
5060 mgmt = (const struct ieee80211_mgmt *) buf;
5061
5062 #ifdef CONFIG_TESTING_OPTIONS
5063 if (hapd->ext_mgmt_frame_handling) {
5064 size_t hex_len = 2 * len + 1;
5065 char *hex = os_malloc(hex_len);
5066
5067 if (hex) {
5068 wpa_snprintf_hex(hex, hex_len, buf, len);
5069 wpa_msg(hapd->msg_ctx, MSG_INFO,
5070 "MGMT-TX-STATUS stype=%u ok=%d buf=%s",
5071 stype, ok, hex);
5072 os_free(hex);
5073 }
5074 return;
5075 }
5076 #endif /* CONFIG_TESTING_OPTIONS */
5077
5078 switch (stype) {
5079 case WLAN_FC_STYPE_AUTH:
5080 wpa_printf(MSG_DEBUG, "mgmt::auth cb");
5081 handle_auth_cb(hapd, mgmt, len, ok);
5082 break;
5083 case WLAN_FC_STYPE_ASSOC_RESP:
5084 wpa_printf(MSG_DEBUG, "mgmt::assoc_resp cb");
5085 handle_assoc_cb(hapd, mgmt, len, 0, ok);
5086 break;
5087 case WLAN_FC_STYPE_REASSOC_RESP:
5088 wpa_printf(MSG_DEBUG, "mgmt::reassoc_resp cb");
5089 handle_assoc_cb(hapd, mgmt, len, 1, ok);
5090 break;
5091 case WLAN_FC_STYPE_PROBE_RESP:
5092 wpa_printf(MSG_EXCESSIVE, "mgmt::proberesp cb ok=%d", ok);
5093 break;
5094 case WLAN_FC_STYPE_DEAUTH:
5095 wpa_printf(MSG_DEBUG, "mgmt::deauth cb");
5096 handle_deauth_cb(hapd, mgmt, len, ok);
5097 break;
5098 case WLAN_FC_STYPE_DISASSOC:
5099 wpa_printf(MSG_DEBUG, "mgmt::disassoc cb");
5100 handle_disassoc_cb(hapd, mgmt, len, ok);
5101 break;
5102 case WLAN_FC_STYPE_ACTION:
5103 wpa_printf(MSG_DEBUG, "mgmt::action cb ok=%d", ok);
5104 handle_action_cb(hapd, mgmt, len, ok);
5105 break;
5106 default:
5107 wpa_printf(MSG_INFO, "unknown mgmt cb frame subtype %d", stype);
5108 break;
5109 }
5110 }
5111
5112
ieee802_11_get_mib(struct hostapd_data * hapd,char * buf,size_t buflen)5113 int ieee802_11_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
5114 {
5115 /* TODO */
5116 return 0;
5117 }
5118
5119
ieee802_11_get_mib_sta(struct hostapd_data * hapd,struct sta_info * sta,char * buf,size_t buflen)5120 int ieee802_11_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
5121 char *buf, size_t buflen)
5122 {
5123 /* TODO */
5124 return 0;
5125 }
5126
5127
hostapd_tx_status(struct hostapd_data * hapd,const u8 * addr,const u8 * buf,size_t len,int ack)5128 void hostapd_tx_status(struct hostapd_data *hapd, const u8 *addr,
5129 const u8 *buf, size_t len, int ack)
5130 {
5131 struct sta_info *sta;
5132 struct hostapd_iface *iface = hapd->iface;
5133
5134 sta = ap_get_sta(hapd, addr);
5135 if (sta == NULL && iface->num_bss > 1) {
5136 size_t j;
5137 for (j = 0; j < iface->num_bss; j++) {
5138 hapd = iface->bss[j];
5139 sta = ap_get_sta(hapd, addr);
5140 if (sta)
5141 break;
5142 }
5143 }
5144 if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC))
5145 return;
5146 if (sta->flags & WLAN_STA_PENDING_POLL) {
5147 wpa_printf(MSG_DEBUG, "STA " MACSTR " %s pending "
5148 "activity poll", MAC2STR(sta->addr),
5149 ack ? "ACKed" : "did not ACK");
5150 if (ack)
5151 sta->flags &= ~WLAN_STA_PENDING_POLL;
5152 }
5153
5154 ieee802_1x_tx_status(hapd, sta, buf, len, ack);
5155 }
5156
5157
hostapd_eapol_tx_status(struct hostapd_data * hapd,const u8 * dst,const u8 * data,size_t len,int ack)5158 void hostapd_eapol_tx_status(struct hostapd_data *hapd, const u8 *dst,
5159 const u8 *data, size_t len, int ack)
5160 {
5161 struct sta_info *sta;
5162 struct hostapd_iface *iface = hapd->iface;
5163
5164 sta = ap_get_sta(hapd, dst);
5165 if (sta == NULL && iface->num_bss > 1) {
5166 size_t j;
5167 for (j = 0; j < iface->num_bss; j++) {
5168 hapd = iface->bss[j];
5169 sta = ap_get_sta(hapd, dst);
5170 if (sta)
5171 break;
5172 }
5173 }
5174 if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) {
5175 wpa_printf(MSG_DEBUG, "Ignore TX status for Data frame to STA "
5176 MACSTR " that is not currently associated",
5177 MAC2STR(dst));
5178 return;
5179 }
5180
5181 ieee802_1x_eapol_tx_status(hapd, sta, data, len, ack);
5182 }
5183
5184
hostapd_client_poll_ok(struct hostapd_data * hapd,const u8 * addr)5185 void hostapd_client_poll_ok(struct hostapd_data *hapd, const u8 *addr)
5186 {
5187 struct sta_info *sta;
5188 struct hostapd_iface *iface = hapd->iface;
5189
5190 sta = ap_get_sta(hapd, addr);
5191 if (sta == NULL && iface->num_bss > 1) {
5192 size_t j;
5193 for (j = 0; j < iface->num_bss; j++) {
5194 hapd = iface->bss[j];
5195 sta = ap_get_sta(hapd, addr);
5196 if (sta)
5197 break;
5198 }
5199 }
5200 if (sta == NULL)
5201 return;
5202 wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_POLL_OK MACSTR,
5203 MAC2STR(sta->addr));
5204 if (!(sta->flags & WLAN_STA_PENDING_POLL))
5205 return;
5206
5207 wpa_printf(MSG_DEBUG, "STA " MACSTR " ACKed pending "
5208 "activity poll", MAC2STR(sta->addr));
5209 sta->flags &= ~WLAN_STA_PENDING_POLL;
5210 }
5211
5212
ieee802_11_rx_from_unknown(struct hostapd_data * hapd,const u8 * src,int wds)5213 void ieee802_11_rx_from_unknown(struct hostapd_data *hapd, const u8 *src,
5214 int wds)
5215 {
5216 struct sta_info *sta;
5217
5218 sta = ap_get_sta(hapd, src);
5219 if (sta &&
5220 ((sta->flags & WLAN_STA_ASSOC) ||
5221 ((sta->flags & WLAN_STA_ASSOC_REQ_OK) && wds))) {
5222 if (!hapd->conf->wds_sta)
5223 return;
5224
5225 if ((sta->flags & (WLAN_STA_ASSOC | WLAN_STA_ASSOC_REQ_OK)) ==
5226 WLAN_STA_ASSOC_REQ_OK) {
5227 wpa_printf(MSG_DEBUG,
5228 "Postpone 4-address WDS mode enabling for STA "
5229 MACSTR " since TX status for AssocResp is not yet known",
5230 MAC2STR(sta->addr));
5231 sta->pending_wds_enable = 1;
5232 return;
5233 }
5234
5235 if (wds && !(sta->flags & WLAN_STA_WDS)) {
5236 int ret;
5237 char ifname_wds[IFNAMSIZ + 1];
5238
5239 wpa_printf(MSG_DEBUG, "Enable 4-address WDS mode for "
5240 "STA " MACSTR " (aid %u)",
5241 MAC2STR(sta->addr), sta->aid);
5242 sta->flags |= WLAN_STA_WDS;
5243 ret = hostapd_set_wds_sta(hapd, ifname_wds,
5244 sta->addr, sta->aid, 1);
5245 if (!ret)
5246 hostapd_set_wds_encryption(hapd, sta,
5247 ifname_wds);
5248 }
5249 return;
5250 }
5251
5252 wpa_printf(MSG_DEBUG, "Data/PS-poll frame from not associated STA "
5253 MACSTR, MAC2STR(src));
5254 if (is_multicast_ether_addr(src)) {
5255 /* Broadcast bit set in SA?! Ignore the frame silently. */
5256 return;
5257 }
5258
5259 if (sta && (sta->flags & WLAN_STA_ASSOC_REQ_OK)) {
5260 wpa_printf(MSG_DEBUG, "Association Response to the STA has "
5261 "already been sent, but no TX status yet known - "
5262 "ignore Class 3 frame issue with " MACSTR,
5263 MAC2STR(src));
5264 return;
5265 }
5266
5267 if (sta && (sta->flags & WLAN_STA_AUTH))
5268 hostapd_drv_sta_disassoc(
5269 hapd, src,
5270 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
5271 else
5272 hostapd_drv_sta_deauth(
5273 hapd, src,
5274 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
5275 }
5276
5277
5278 #endif /* CONFIG_NATIVE_WINDOWS */
5279