xref: /freebsd/contrib/wpa/src/ap/ap_config.c (revision 59e2ff550c448126b988150ce800cdf73bb5103e)
1 /*
2  * hostapd / Configuration helper functions
3  * Copyright (c) 2003-2014, 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 #include "utils/common.h"
12 #include "crypto/sha1.h"
13 #include "radius/radius_client.h"
14 #include "common/ieee802_11_defs.h"
15 #include "common/eapol_common.h"
16 #include "eap_common/eap_wsc_common.h"
17 #include "eap_server/eap.h"
18 #include "wpa_auth.h"
19 #include "sta_info.h"
20 #include "ap_config.h"
21 
22 
23 static void hostapd_config_free_vlan(struct hostapd_bss_config *bss)
24 {
25 	struct hostapd_vlan *vlan, *prev;
26 
27 	vlan = bss->vlan;
28 	prev = NULL;
29 	while (vlan) {
30 		prev = vlan;
31 		vlan = vlan->next;
32 		os_free(prev);
33 	}
34 
35 	bss->vlan = NULL;
36 }
37 
38 
39 void hostapd_config_defaults_bss(struct hostapd_bss_config *bss)
40 {
41 	bss->logger_syslog_level = HOSTAPD_LEVEL_INFO;
42 	bss->logger_stdout_level = HOSTAPD_LEVEL_INFO;
43 	bss->logger_syslog = (unsigned int) -1;
44 	bss->logger_stdout = (unsigned int) -1;
45 
46 	bss->auth_algs = WPA_AUTH_ALG_OPEN | WPA_AUTH_ALG_SHARED;
47 
48 	bss->wep_rekeying_period = 300;
49 	/* use key0 in individual key and key1 in broadcast key */
50 	bss->broadcast_key_idx_min = 1;
51 	bss->broadcast_key_idx_max = 2;
52 	bss->eap_reauth_period = 3600;
53 
54 	bss->wpa_group_rekey = 600;
55 	bss->wpa_gmk_rekey = 86400;
56 	bss->wpa_key_mgmt = WPA_KEY_MGMT_PSK;
57 	bss->wpa_pairwise = WPA_CIPHER_TKIP;
58 	bss->wpa_group = WPA_CIPHER_TKIP;
59 	bss->rsn_pairwise = 0;
60 
61 	bss->max_num_sta = MAX_STA_COUNT;
62 
63 	bss->dtim_period = 2;
64 
65 	bss->radius_server_auth_port = 1812;
66 	bss->ap_max_inactivity = AP_MAX_INACTIVITY;
67 	bss->eapol_version = EAPOL_VERSION;
68 
69 	bss->max_listen_interval = 65535;
70 
71 	bss->pwd_group = 19; /* ECC: GF(p=256) */
72 
73 #ifdef CONFIG_IEEE80211W
74 	bss->assoc_sa_query_max_timeout = 1000;
75 	bss->assoc_sa_query_retry_timeout = 201;
76 	bss->group_mgmt_cipher = WPA_CIPHER_AES_128_CMAC;
77 #endif /* CONFIG_IEEE80211W */
78 #ifdef EAP_SERVER_FAST
79 	 /* both anonymous and authenticated provisioning */
80 	bss->eap_fast_prov = 3;
81 	bss->pac_key_lifetime = 7 * 24 * 60 * 60;
82 	bss->pac_key_refresh_time = 1 * 24 * 60 * 60;
83 #endif /* EAP_SERVER_FAST */
84 
85 	/* Set to -1 as defaults depends on HT in setup */
86 	bss->wmm_enabled = -1;
87 
88 #ifdef CONFIG_IEEE80211R
89 	bss->ft_over_ds = 1;
90 #endif /* CONFIG_IEEE80211R */
91 
92 	bss->radius_das_time_window = 300;
93 
94 	bss->sae_anti_clogging_threshold = 5;
95 }
96 
97 
98 struct hostapd_config * hostapd_config_defaults(void)
99 {
100 #define ecw2cw(ecw) ((1 << (ecw)) - 1)
101 
102 	struct hostapd_config *conf;
103 	struct hostapd_bss_config *bss;
104 	const int aCWmin = 4, aCWmax = 10;
105 	const struct hostapd_wmm_ac_params ac_bk =
106 		{ aCWmin, aCWmax, 7, 0, 0 }; /* background traffic */
107 	const struct hostapd_wmm_ac_params ac_be =
108 		{ aCWmin, aCWmax, 3, 0, 0 }; /* best effort traffic */
109 	const struct hostapd_wmm_ac_params ac_vi = /* video traffic */
110 		{ aCWmin - 1, aCWmin, 2, 3008 / 32, 0 };
111 	const struct hostapd_wmm_ac_params ac_vo = /* voice traffic */
112 		{ aCWmin - 2, aCWmin - 1, 2, 1504 / 32, 0 };
113 	const struct hostapd_tx_queue_params txq_bk =
114 		{ 7, ecw2cw(aCWmin), ecw2cw(aCWmax), 0 };
115 	const struct hostapd_tx_queue_params txq_be =
116 		{ 3, ecw2cw(aCWmin), 4 * (ecw2cw(aCWmin) + 1) - 1, 0};
117 	const struct hostapd_tx_queue_params txq_vi =
118 		{ 1, (ecw2cw(aCWmin) + 1) / 2 - 1, ecw2cw(aCWmin), 30};
119 	const struct hostapd_tx_queue_params txq_vo =
120 		{ 1, (ecw2cw(aCWmin) + 1) / 4 - 1,
121 		  (ecw2cw(aCWmin) + 1) / 2 - 1, 15};
122 
123 #undef ecw2cw
124 
125 	conf = os_zalloc(sizeof(*conf));
126 	bss = os_zalloc(sizeof(*bss));
127 	if (conf == NULL || bss == NULL) {
128 		wpa_printf(MSG_ERROR, "Failed to allocate memory for "
129 			   "configuration data.");
130 		os_free(conf);
131 		os_free(bss);
132 		return NULL;
133 	}
134 	conf->bss = os_calloc(1, sizeof(struct hostapd_bss_config *));
135 	if (conf->bss == NULL) {
136 		os_free(conf);
137 		os_free(bss);
138 		return NULL;
139 	}
140 	conf->bss[0] = bss;
141 
142 	bss->radius = os_zalloc(sizeof(*bss->radius));
143 	if (bss->radius == NULL) {
144 		os_free(conf->bss);
145 		os_free(conf);
146 		os_free(bss);
147 		return NULL;
148 	}
149 
150 	hostapd_config_defaults_bss(bss);
151 
152 	conf->num_bss = 1;
153 
154 	conf->beacon_int = 100;
155 	conf->rts_threshold = -1; /* use driver default: 2347 */
156 	conf->fragm_threshold = -1; /* user driver default: 2346 */
157 	conf->send_probe_response = 1;
158 	/* Set to invalid value means do not add Power Constraint IE */
159 	conf->local_pwr_constraint = -1;
160 
161 	conf->wmm_ac_params[0] = ac_be;
162 	conf->wmm_ac_params[1] = ac_bk;
163 	conf->wmm_ac_params[2] = ac_vi;
164 	conf->wmm_ac_params[3] = ac_vo;
165 
166 	conf->tx_queue[0] = txq_vo;
167 	conf->tx_queue[1] = txq_vi;
168 	conf->tx_queue[2] = txq_be;
169 	conf->tx_queue[3] = txq_bk;
170 
171 	conf->ht_capab = HT_CAP_INFO_SMPS_DISABLED;
172 
173 	conf->ap_table_max_size = 255;
174 	conf->ap_table_expiration_time = 60;
175 
176 #ifdef CONFIG_TESTING_OPTIONS
177 	conf->ignore_probe_probability = 0.0;
178 	conf->ignore_auth_probability = 0.0;
179 	conf->ignore_assoc_probability = 0.0;
180 	conf->ignore_reassoc_probability = 0.0;
181 	conf->corrupt_gtk_rekey_mic_probability = 0.0;
182 #endif /* CONFIG_TESTING_OPTIONS */
183 
184 #ifdef CONFIG_ACS
185 	conf->acs_num_scans = 5;
186 #endif /* CONFIG_ACS */
187 
188 	return conf;
189 }
190 
191 
192 int hostapd_mac_comp(const void *a, const void *b)
193 {
194 	return os_memcmp(a, b, sizeof(macaddr));
195 }
196 
197 
198 int hostapd_mac_comp_empty(const void *a)
199 {
200 	macaddr empty = { 0 };
201 	return os_memcmp(a, empty, sizeof(macaddr));
202 }
203 
204 
205 static int hostapd_config_read_wpa_psk(const char *fname,
206 				       struct hostapd_ssid *ssid)
207 {
208 	FILE *f;
209 	char buf[128], *pos;
210 	int line = 0, ret = 0, len, ok;
211 	u8 addr[ETH_ALEN];
212 	struct hostapd_wpa_psk *psk;
213 
214 	if (!fname)
215 		return 0;
216 
217 	f = fopen(fname, "r");
218 	if (!f) {
219 		wpa_printf(MSG_ERROR, "WPA PSK file '%s' not found.", fname);
220 		return -1;
221 	}
222 
223 	while (fgets(buf, sizeof(buf), f)) {
224 		line++;
225 
226 		if (buf[0] == '#')
227 			continue;
228 		pos = buf;
229 		while (*pos != '\0') {
230 			if (*pos == '\n') {
231 				*pos = '\0';
232 				break;
233 			}
234 			pos++;
235 		}
236 		if (buf[0] == '\0')
237 			continue;
238 
239 		if (hwaddr_aton(buf, addr)) {
240 			wpa_printf(MSG_ERROR, "Invalid MAC address '%s' on "
241 				   "line %d in '%s'", buf, line, fname);
242 			ret = -1;
243 			break;
244 		}
245 
246 		psk = os_zalloc(sizeof(*psk));
247 		if (psk == NULL) {
248 			wpa_printf(MSG_ERROR, "WPA PSK allocation failed");
249 			ret = -1;
250 			break;
251 		}
252 		if (is_zero_ether_addr(addr))
253 			psk->group = 1;
254 		else
255 			os_memcpy(psk->addr, addr, ETH_ALEN);
256 
257 		pos = buf + 17;
258 		if (*pos == '\0') {
259 			wpa_printf(MSG_ERROR, "No PSK on line %d in '%s'",
260 				   line, fname);
261 			os_free(psk);
262 			ret = -1;
263 			break;
264 		}
265 		pos++;
266 
267 		ok = 0;
268 		len = os_strlen(pos);
269 		if (len == 64 && hexstr2bin(pos, psk->psk, PMK_LEN) == 0)
270 			ok = 1;
271 		else if (len >= 8 && len < 64) {
272 			pbkdf2_sha1(pos, ssid->ssid, ssid->ssid_len,
273 				    4096, psk->psk, PMK_LEN);
274 			ok = 1;
275 		}
276 		if (!ok) {
277 			wpa_printf(MSG_ERROR, "Invalid PSK '%s' on line %d in "
278 				   "'%s'", pos, line, fname);
279 			os_free(psk);
280 			ret = -1;
281 			break;
282 		}
283 
284 		psk->next = ssid->wpa_psk;
285 		ssid->wpa_psk = psk;
286 	}
287 
288 	fclose(f);
289 
290 	return ret;
291 }
292 
293 
294 static int hostapd_derive_psk(struct hostapd_ssid *ssid)
295 {
296 	ssid->wpa_psk = os_zalloc(sizeof(struct hostapd_wpa_psk));
297 	if (ssid->wpa_psk == NULL) {
298 		wpa_printf(MSG_ERROR, "Unable to alloc space for PSK");
299 		return -1;
300 	}
301 	wpa_hexdump_ascii(MSG_DEBUG, "SSID",
302 			  (u8 *) ssid->ssid, ssid->ssid_len);
303 	wpa_hexdump_ascii_key(MSG_DEBUG, "PSK (ASCII passphrase)",
304 			      (u8 *) ssid->wpa_passphrase,
305 			      os_strlen(ssid->wpa_passphrase));
306 	pbkdf2_sha1(ssid->wpa_passphrase,
307 		    ssid->ssid, ssid->ssid_len,
308 		    4096, ssid->wpa_psk->psk, PMK_LEN);
309 	wpa_hexdump_key(MSG_DEBUG, "PSK (from passphrase)",
310 			ssid->wpa_psk->psk, PMK_LEN);
311 	return 0;
312 }
313 
314 
315 int hostapd_setup_wpa_psk(struct hostapd_bss_config *conf)
316 {
317 	struct hostapd_ssid *ssid = &conf->ssid;
318 
319 	if (ssid->wpa_passphrase != NULL) {
320 		if (ssid->wpa_psk != NULL) {
321 			wpa_printf(MSG_DEBUG, "Using pre-configured WPA PSK "
322 				   "instead of passphrase");
323 		} else {
324 			wpa_printf(MSG_DEBUG, "Deriving WPA PSK based on "
325 				   "passphrase");
326 			if (hostapd_derive_psk(ssid) < 0)
327 				return -1;
328 		}
329 		ssid->wpa_psk->group = 1;
330 	}
331 
332 	if (ssid->wpa_psk_file) {
333 		if (hostapd_config_read_wpa_psk(ssid->wpa_psk_file,
334 						&conf->ssid))
335 			return -1;
336 	}
337 
338 	return 0;
339 }
340 
341 
342 static void hostapd_config_free_radius(struct hostapd_radius_server *servers,
343 				       int num_servers)
344 {
345 	int i;
346 
347 	for (i = 0; i < num_servers; i++) {
348 		os_free(servers[i].shared_secret);
349 	}
350 	os_free(servers);
351 }
352 
353 
354 struct hostapd_radius_attr *
355 hostapd_config_get_radius_attr(struct hostapd_radius_attr *attr, u8 type)
356 {
357 	for (; attr; attr = attr->next) {
358 		if (attr->type == type)
359 			return attr;
360 	}
361 	return NULL;
362 }
363 
364 
365 static void hostapd_config_free_radius_attr(struct hostapd_radius_attr *attr)
366 {
367 	struct hostapd_radius_attr *prev;
368 
369 	while (attr) {
370 		prev = attr;
371 		attr = attr->next;
372 		wpabuf_free(prev->val);
373 		os_free(prev);
374 	}
375 }
376 
377 
378 void hostapd_config_free_eap_user(struct hostapd_eap_user *user)
379 {
380 	hostapd_config_free_radius_attr(user->accept_attr);
381 	os_free(user->identity);
382 	bin_clear_free(user->password, user->password_len);
383 	os_free(user);
384 }
385 
386 
387 static void hostapd_config_free_wep(struct hostapd_wep_keys *keys)
388 {
389 	int i;
390 	for (i = 0; i < NUM_WEP_KEYS; i++) {
391 		bin_clear_free(keys->key[i], keys->len[i]);
392 		keys->key[i] = NULL;
393 	}
394 }
395 
396 
397 void hostapd_config_clear_wpa_psk(struct hostapd_wpa_psk **l)
398 {
399 	struct hostapd_wpa_psk *psk, *tmp;
400 
401 	for (psk = *l; psk;) {
402 		tmp = psk;
403 		psk = psk->next;
404 		bin_clear_free(tmp, sizeof(*tmp));
405 	}
406 	*l = NULL;
407 }
408 
409 
410 void hostapd_config_free_bss(struct hostapd_bss_config *conf)
411 {
412 	struct hostapd_eap_user *user, *prev_user;
413 
414 	if (conf == NULL)
415 		return;
416 
417 	hostapd_config_clear_wpa_psk(&conf->ssid.wpa_psk);
418 
419 	str_clear_free(conf->ssid.wpa_passphrase);
420 	os_free(conf->ssid.wpa_psk_file);
421 	hostapd_config_free_wep(&conf->ssid.wep);
422 #ifdef CONFIG_FULL_DYNAMIC_VLAN
423 	os_free(conf->ssid.vlan_tagged_interface);
424 #endif /* CONFIG_FULL_DYNAMIC_VLAN */
425 
426 	user = conf->eap_user;
427 	while (user) {
428 		prev_user = user;
429 		user = user->next;
430 		hostapd_config_free_eap_user(prev_user);
431 	}
432 	os_free(conf->eap_user_sqlite);
433 
434 	os_free(conf->eap_req_id_text);
435 	os_free(conf->erp_domain);
436 	os_free(conf->accept_mac);
437 	os_free(conf->deny_mac);
438 	os_free(conf->nas_identifier);
439 	if (conf->radius) {
440 		hostapd_config_free_radius(conf->radius->auth_servers,
441 					   conf->radius->num_auth_servers);
442 		hostapd_config_free_radius(conf->radius->acct_servers,
443 					   conf->radius->num_acct_servers);
444 	}
445 	hostapd_config_free_radius_attr(conf->radius_auth_req_attr);
446 	hostapd_config_free_radius_attr(conf->radius_acct_req_attr);
447 	os_free(conf->rsn_preauth_interfaces);
448 	os_free(conf->ctrl_interface);
449 	os_free(conf->ca_cert);
450 	os_free(conf->server_cert);
451 	os_free(conf->private_key);
452 	os_free(conf->private_key_passwd);
453 	os_free(conf->ocsp_stapling_response);
454 	os_free(conf->dh_file);
455 	os_free(conf->openssl_ciphers);
456 	os_free(conf->pac_opaque_encr_key);
457 	os_free(conf->eap_fast_a_id);
458 	os_free(conf->eap_fast_a_id_info);
459 	os_free(conf->eap_sim_db);
460 	os_free(conf->radius_server_clients);
461 	os_free(conf->radius);
462 	os_free(conf->radius_das_shared_secret);
463 	hostapd_config_free_vlan(conf);
464 	os_free(conf->time_zone);
465 
466 #ifdef CONFIG_IEEE80211R
467 	{
468 		struct ft_remote_r0kh *r0kh, *r0kh_prev;
469 		struct ft_remote_r1kh *r1kh, *r1kh_prev;
470 
471 		r0kh = conf->r0kh_list;
472 		conf->r0kh_list = NULL;
473 		while (r0kh) {
474 			r0kh_prev = r0kh;
475 			r0kh = r0kh->next;
476 			os_free(r0kh_prev);
477 		}
478 
479 		r1kh = conf->r1kh_list;
480 		conf->r1kh_list = NULL;
481 		while (r1kh) {
482 			r1kh_prev = r1kh;
483 			r1kh = r1kh->next;
484 			os_free(r1kh_prev);
485 		}
486 	}
487 #endif /* CONFIG_IEEE80211R */
488 
489 #ifdef CONFIG_WPS
490 	os_free(conf->wps_pin_requests);
491 	os_free(conf->device_name);
492 	os_free(conf->manufacturer);
493 	os_free(conf->model_name);
494 	os_free(conf->model_number);
495 	os_free(conf->serial_number);
496 	os_free(conf->config_methods);
497 	os_free(conf->ap_pin);
498 	os_free(conf->extra_cred);
499 	os_free(conf->ap_settings);
500 	os_free(conf->upnp_iface);
501 	os_free(conf->friendly_name);
502 	os_free(conf->manufacturer_url);
503 	os_free(conf->model_description);
504 	os_free(conf->model_url);
505 	os_free(conf->upc);
506 	{
507 		unsigned int i;
508 
509 		for (i = 0; i < MAX_WPS_VENDOR_EXTENSIONS; i++)
510 			wpabuf_free(conf->wps_vendor_ext[i]);
511 	}
512 	wpabuf_free(conf->wps_nfc_dh_pubkey);
513 	wpabuf_free(conf->wps_nfc_dh_privkey);
514 	wpabuf_free(conf->wps_nfc_dev_pw);
515 #endif /* CONFIG_WPS */
516 
517 	os_free(conf->roaming_consortium);
518 	os_free(conf->venue_name);
519 	os_free(conf->nai_realm_data);
520 	os_free(conf->network_auth_type);
521 	os_free(conf->anqp_3gpp_cell_net);
522 	os_free(conf->domain_name);
523 
524 #ifdef CONFIG_RADIUS_TEST
525 	os_free(conf->dump_msk_file);
526 #endif /* CONFIG_RADIUS_TEST */
527 
528 #ifdef CONFIG_HS20
529 	os_free(conf->hs20_oper_friendly_name);
530 	os_free(conf->hs20_wan_metrics);
531 	os_free(conf->hs20_connection_capability);
532 	os_free(conf->hs20_operating_class);
533 	os_free(conf->hs20_icons);
534 	if (conf->hs20_osu_providers) {
535 		size_t i;
536 		for (i = 0; i < conf->hs20_osu_providers_count; i++) {
537 			struct hs20_osu_provider *p;
538 			size_t j;
539 			p = &conf->hs20_osu_providers[i];
540 			os_free(p->friendly_name);
541 			os_free(p->server_uri);
542 			os_free(p->method_list);
543 			for (j = 0; j < p->icons_count; j++)
544 				os_free(p->icons[j]);
545 			os_free(p->icons);
546 			os_free(p->osu_nai);
547 			os_free(p->service_desc);
548 		}
549 		os_free(conf->hs20_osu_providers);
550 	}
551 	os_free(conf->subscr_remediation_url);
552 #endif /* CONFIG_HS20 */
553 
554 	wpabuf_free(conf->vendor_elements);
555 
556 	os_free(conf->sae_groups);
557 
558 	os_free(conf->wowlan_triggers);
559 
560 	os_free(conf->server_id);
561 
562 	os_free(conf);
563 }
564 
565 
566 /**
567  * hostapd_config_free - Free hostapd configuration
568  * @conf: Configuration data from hostapd_config_read().
569  */
570 void hostapd_config_free(struct hostapd_config *conf)
571 {
572 	size_t i;
573 
574 	if (conf == NULL)
575 		return;
576 
577 	for (i = 0; i < conf->num_bss; i++)
578 		hostapd_config_free_bss(conf->bss[i]);
579 	os_free(conf->bss);
580 	os_free(conf->supported_rates);
581 	os_free(conf->basic_rates);
582 	os_free(conf->chanlist);
583 	os_free(conf->driver_params);
584 #ifdef CONFIG_ACS
585 	os_free(conf->acs_chan_bias);
586 #endif /* CONFIG_ACS */
587 
588 	os_free(conf);
589 }
590 
591 
592 /**
593  * hostapd_maclist_found - Find a MAC address from a list
594  * @list: MAC address list
595  * @num_entries: Number of addresses in the list
596  * @addr: Address to search for
597  * @vlan_id: Buffer for returning VLAN ID or %NULL if not needed
598  * Returns: 1 if address is in the list or 0 if not.
599  *
600  * Perform a binary search for given MAC address from a pre-sorted list.
601  */
602 int hostapd_maclist_found(struct mac_acl_entry *list, int num_entries,
603 			  const u8 *addr, int *vlan_id)
604 {
605 	int start, end, middle, res;
606 
607 	start = 0;
608 	end = num_entries - 1;
609 
610 	while (start <= end) {
611 		middle = (start + end) / 2;
612 		res = os_memcmp(list[middle].addr, addr, ETH_ALEN);
613 		if (res == 0) {
614 			if (vlan_id)
615 				*vlan_id = list[middle].vlan_id;
616 			return 1;
617 		}
618 		if (res < 0)
619 			start = middle + 1;
620 		else
621 			end = middle - 1;
622 	}
623 
624 	return 0;
625 }
626 
627 
628 int hostapd_rate_found(int *list, int rate)
629 {
630 	int i;
631 
632 	if (list == NULL)
633 		return 0;
634 
635 	for (i = 0; list[i] >= 0; i++)
636 		if (list[i] == rate)
637 			return 1;
638 
639 	return 0;
640 }
641 
642 
643 int hostapd_vlan_id_valid(struct hostapd_vlan *vlan, int vlan_id)
644 {
645 	struct hostapd_vlan *v = vlan;
646 	while (v) {
647 		if (v->vlan_id == vlan_id || v->vlan_id == VLAN_ID_WILDCARD)
648 			return 1;
649 		v = v->next;
650 	}
651 	return 0;
652 }
653 
654 
655 const char * hostapd_get_vlan_id_ifname(struct hostapd_vlan *vlan, int vlan_id)
656 {
657 	struct hostapd_vlan *v = vlan;
658 	while (v) {
659 		if (v->vlan_id == vlan_id)
660 			return v->ifname;
661 		v = v->next;
662 	}
663 	return NULL;
664 }
665 
666 
667 const u8 * hostapd_get_psk(const struct hostapd_bss_config *conf,
668 			   const u8 *addr, const u8 *p2p_dev_addr,
669 			   const u8 *prev_psk)
670 {
671 	struct hostapd_wpa_psk *psk;
672 	int next_ok = prev_psk == NULL;
673 
674 	if (p2p_dev_addr && !is_zero_ether_addr(p2p_dev_addr)) {
675 		wpa_printf(MSG_DEBUG, "Searching a PSK for " MACSTR
676 			   " p2p_dev_addr=" MACSTR " prev_psk=%p",
677 			   MAC2STR(addr), MAC2STR(p2p_dev_addr), prev_psk);
678 		addr = NULL; /* Use P2P Device Address for matching */
679 	} else {
680 		wpa_printf(MSG_DEBUG, "Searching a PSK for " MACSTR
681 			   " prev_psk=%p",
682 			   MAC2STR(addr), prev_psk);
683 	}
684 
685 	for (psk = conf->ssid.wpa_psk; psk != NULL; psk = psk->next) {
686 		if (next_ok &&
687 		    (psk->group ||
688 		     (addr && os_memcmp(psk->addr, addr, ETH_ALEN) == 0) ||
689 		     (!addr && p2p_dev_addr &&
690 		      os_memcmp(psk->p2p_dev_addr, p2p_dev_addr, ETH_ALEN) ==
691 		      0)))
692 			return psk->psk;
693 
694 		if (psk->psk == prev_psk)
695 			next_ok = 1;
696 	}
697 
698 	return NULL;
699 }
700 
701 
702 static int hostapd_config_check_bss(struct hostapd_bss_config *bss,
703 				    struct hostapd_config *conf,
704 				    int full_config)
705 {
706 	if (full_config && bss->ieee802_1x && !bss->eap_server &&
707 	    !bss->radius->auth_servers) {
708 		wpa_printf(MSG_ERROR, "Invalid IEEE 802.1X configuration (no "
709 			   "EAP authenticator configured).");
710 		return -1;
711 	}
712 
713 	if (bss->wpa) {
714 		int wep, i;
715 
716 		wep = bss->default_wep_key_len > 0 ||
717 		       bss->individual_wep_key_len > 0;
718 		for (i = 0; i < NUM_WEP_KEYS; i++) {
719 			if (bss->ssid.wep.keys_set) {
720 				wep = 1;
721 				break;
722 			}
723 		}
724 
725 		if (wep) {
726 			wpa_printf(MSG_ERROR, "WEP configuration in a WPA network is not supported");
727 			return -1;
728 		}
729 	}
730 
731 	if (full_config && bss->wpa &&
732 	    bss->wpa_psk_radius != PSK_RADIUS_IGNORED &&
733 	    bss->macaddr_acl != USE_EXTERNAL_RADIUS_AUTH) {
734 		wpa_printf(MSG_ERROR, "WPA-PSK using RADIUS enabled, but no "
735 			   "RADIUS checking (macaddr_acl=2) enabled.");
736 		return -1;
737 	}
738 
739 	if (full_config && bss->wpa && (bss->wpa_key_mgmt & WPA_KEY_MGMT_PSK) &&
740 	    bss->ssid.wpa_psk == NULL && bss->ssid.wpa_passphrase == NULL &&
741 	    bss->ssid.wpa_psk_file == NULL &&
742 	    (bss->wpa_psk_radius != PSK_RADIUS_REQUIRED ||
743 	     bss->macaddr_acl != USE_EXTERNAL_RADIUS_AUTH)) {
744 		wpa_printf(MSG_ERROR, "WPA-PSK enabled, but PSK or passphrase "
745 			   "is not configured.");
746 		return -1;
747 	}
748 
749 	if (full_config && hostapd_mac_comp_empty(bss->bssid) != 0) {
750 		size_t i;
751 
752 		for (i = 0; i < conf->num_bss; i++) {
753 			if (conf->bss[i] != bss &&
754 			    (hostapd_mac_comp(conf->bss[i]->bssid,
755 					      bss->bssid) == 0)) {
756 				wpa_printf(MSG_ERROR, "Duplicate BSSID " MACSTR
757 					   " on interface '%s' and '%s'.",
758 					   MAC2STR(bss->bssid),
759 					   conf->bss[i]->iface, bss->iface);
760 				return -1;
761 			}
762 		}
763 	}
764 
765 #ifdef CONFIG_IEEE80211R
766 	if (full_config && wpa_key_mgmt_ft(bss->wpa_key_mgmt) &&
767 	    (bss->nas_identifier == NULL ||
768 	     os_strlen(bss->nas_identifier) < 1 ||
769 	     os_strlen(bss->nas_identifier) > FT_R0KH_ID_MAX_LEN)) {
770 		wpa_printf(MSG_ERROR, "FT (IEEE 802.11r) requires "
771 			   "nas_identifier to be configured as a 1..48 octet "
772 			   "string");
773 		return -1;
774 	}
775 #endif /* CONFIG_IEEE80211R */
776 
777 #ifdef CONFIG_IEEE80211N
778 	if (full_config && conf->ieee80211n &&
779 	    conf->hw_mode == HOSTAPD_MODE_IEEE80211B) {
780 		bss->disable_11n = 1;
781 		wpa_printf(MSG_ERROR, "HT (IEEE 802.11n) in 11b mode is not "
782 			   "allowed, disabling HT capabilities");
783 	}
784 
785 	if (full_config && conf->ieee80211n &&
786 	    bss->ssid.security_policy == SECURITY_STATIC_WEP) {
787 		bss->disable_11n = 1;
788 		wpa_printf(MSG_ERROR, "HT (IEEE 802.11n) with WEP is not "
789 			   "allowed, disabling HT capabilities");
790 	}
791 
792 	if (full_config && conf->ieee80211n && bss->wpa &&
793 	    !(bss->wpa_pairwise & WPA_CIPHER_CCMP) &&
794 	    !(bss->rsn_pairwise & (WPA_CIPHER_CCMP | WPA_CIPHER_GCMP |
795 				   WPA_CIPHER_CCMP_256 | WPA_CIPHER_GCMP_256)))
796 	{
797 		bss->disable_11n = 1;
798 		wpa_printf(MSG_ERROR, "HT (IEEE 802.11n) with WPA/WPA2 "
799 			   "requires CCMP/GCMP to be enabled, disabling HT "
800 			   "capabilities");
801 	}
802 #endif /* CONFIG_IEEE80211N */
803 
804 #ifdef CONFIG_WPS
805 	if (full_config && bss->wps_state && bss->ignore_broadcast_ssid) {
806 		wpa_printf(MSG_INFO, "WPS: ignore_broadcast_ssid "
807 			   "configuration forced WPS to be disabled");
808 		bss->wps_state = 0;
809 	}
810 
811 	if (full_config && bss->wps_state &&
812 	    bss->ssid.wep.keys_set && bss->wpa == 0) {
813 		wpa_printf(MSG_INFO, "WPS: WEP configuration forced WPS to be "
814 			   "disabled");
815 		bss->wps_state = 0;
816 	}
817 
818 	if (full_config && bss->wps_state && bss->wpa &&
819 	    (!(bss->wpa & 2) ||
820 	     !(bss->rsn_pairwise & WPA_CIPHER_CCMP))) {
821 		wpa_printf(MSG_INFO, "WPS: WPA/TKIP configuration without "
822 			   "WPA2/CCMP forced WPS to be disabled");
823 		bss->wps_state = 0;
824 	}
825 #endif /* CONFIG_WPS */
826 
827 #ifdef CONFIG_HS20
828 	if (full_config && bss->hs20 &&
829 	    (!(bss->wpa & 2) ||
830 	     !(bss->rsn_pairwise & (WPA_CIPHER_CCMP | WPA_CIPHER_GCMP |
831 				    WPA_CIPHER_CCMP_256 |
832 				    WPA_CIPHER_GCMP_256)))) {
833 		wpa_printf(MSG_ERROR, "HS 2.0: WPA2-Enterprise/CCMP "
834 			   "configuration is required for Hotspot 2.0 "
835 			   "functionality");
836 		return -1;
837 	}
838 #endif /* CONFIG_HS20 */
839 
840 	return 0;
841 }
842 
843 
844 int hostapd_config_check(struct hostapd_config *conf, int full_config)
845 {
846 	size_t i;
847 
848 	if (full_config && conf->ieee80211d &&
849 	    (!conf->country[0] || !conf->country[1])) {
850 		wpa_printf(MSG_ERROR, "Cannot enable IEEE 802.11d without "
851 			   "setting the country_code");
852 		return -1;
853 	}
854 
855 	if (full_config && conf->ieee80211h && !conf->ieee80211d) {
856 		wpa_printf(MSG_ERROR, "Cannot enable IEEE 802.11h without "
857 			   "IEEE 802.11d enabled");
858 		return -1;
859 	}
860 
861 	if (full_config && conf->local_pwr_constraint != -1 &&
862 	    !conf->ieee80211d) {
863 		wpa_printf(MSG_ERROR, "Cannot add Power Constraint element without Country element");
864 		return -1;
865 	}
866 
867 	if (full_config && conf->spectrum_mgmt_required &&
868 	    conf->local_pwr_constraint == -1) {
869 		wpa_printf(MSG_ERROR, "Cannot set Spectrum Management bit without Country and Power Constraint elements");
870 		return -1;
871 	}
872 
873 	for (i = 0; i < conf->num_bss; i++) {
874 		if (hostapd_config_check_bss(conf->bss[i], conf, full_config))
875 			return -1;
876 	}
877 
878 	return 0;
879 }
880 
881 
882 void hostapd_set_security_params(struct hostapd_bss_config *bss,
883 				 int full_config)
884 {
885 	if (bss->individual_wep_key_len == 0) {
886 		/* individual keys are not use; can use key idx0 for
887 		 * broadcast keys */
888 		bss->broadcast_key_idx_min = 0;
889 	}
890 
891 	if ((bss->wpa & 2) && bss->rsn_pairwise == 0)
892 		bss->rsn_pairwise = bss->wpa_pairwise;
893 	bss->wpa_group = wpa_select_ap_group_cipher(bss->wpa, bss->wpa_pairwise,
894 						    bss->rsn_pairwise);
895 
896 	if (full_config) {
897 		bss->radius->auth_server = bss->radius->auth_servers;
898 		bss->radius->acct_server = bss->radius->acct_servers;
899 	}
900 
901 	if (bss->wpa && bss->ieee802_1x) {
902 		bss->ssid.security_policy = SECURITY_WPA;
903 	} else if (bss->wpa) {
904 		bss->ssid.security_policy = SECURITY_WPA_PSK;
905 	} else if (bss->ieee802_1x) {
906 		int cipher = WPA_CIPHER_NONE;
907 		bss->ssid.security_policy = SECURITY_IEEE_802_1X;
908 		bss->ssid.wep.default_len = bss->default_wep_key_len;
909 		if (full_config && bss->default_wep_key_len) {
910 			cipher = bss->default_wep_key_len >= 13 ?
911 				WPA_CIPHER_WEP104 : WPA_CIPHER_WEP40;
912 		} else if (full_config && bss->ssid.wep.keys_set) {
913 			if (bss->ssid.wep.len[0] >= 13)
914 				cipher = WPA_CIPHER_WEP104;
915 			else
916 				cipher = WPA_CIPHER_WEP40;
917 		}
918 		bss->wpa_group = cipher;
919 		bss->wpa_pairwise = cipher;
920 		bss->rsn_pairwise = cipher;
921 		if (full_config)
922 			bss->wpa_key_mgmt = WPA_KEY_MGMT_IEEE8021X_NO_WPA;
923 	} else if (bss->ssid.wep.keys_set) {
924 		int cipher = WPA_CIPHER_WEP40;
925 		if (bss->ssid.wep.len[0] >= 13)
926 			cipher = WPA_CIPHER_WEP104;
927 		bss->ssid.security_policy = SECURITY_STATIC_WEP;
928 		bss->wpa_group = cipher;
929 		bss->wpa_pairwise = cipher;
930 		bss->rsn_pairwise = cipher;
931 		if (full_config)
932 			bss->wpa_key_mgmt = WPA_KEY_MGMT_NONE;
933 	} else if (bss->osen) {
934 		bss->ssid.security_policy = SECURITY_OSEN;
935 		bss->wpa_group = WPA_CIPHER_CCMP;
936 		bss->wpa_pairwise = 0;
937 		bss->rsn_pairwise = WPA_CIPHER_CCMP;
938 	} else {
939 		bss->ssid.security_policy = SECURITY_PLAINTEXT;
940 		bss->wpa_group = WPA_CIPHER_NONE;
941 		bss->wpa_pairwise = WPA_CIPHER_NONE;
942 		bss->rsn_pairwise = WPA_CIPHER_NONE;
943 		if (full_config)
944 			bss->wpa_key_mgmt = WPA_KEY_MGMT_NONE;
945 	}
946 }
947