1 /*
2 * hostapd / Configuration helper functions
3 * Copyright (c) 2003-2013, 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
hostapd_config_free_vlan(struct hostapd_bss_config * bss)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
hostapd_config_defaults_bss(struct hostapd_bss_config * bss)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 #endif /* CONFIG_IEEE80211W */
77 #ifdef EAP_SERVER_FAST
78 /* both anonymous and authenticated provisioning */
79 bss->eap_fast_prov = 3;
80 bss->pac_key_lifetime = 7 * 24 * 60 * 60;
81 bss->pac_key_refresh_time = 1 * 24 * 60 * 60;
82 #endif /* EAP_SERVER_FAST */
83
84 /* Set to -1 as defaults depends on HT in setup */
85 bss->wmm_enabled = -1;
86
87 #ifdef CONFIG_IEEE80211R
88 bss->ft_over_ds = 1;
89 #endif /* CONFIG_IEEE80211R */
90
91 bss->radius_das_time_window = 300;
92
93 bss->sae_anti_clogging_threshold = 5;
94 }
95
96
hostapd_config_defaults(void)97 struct hostapd_config * hostapd_config_defaults(void)
98 {
99 #define ecw2cw(ecw) ((1 << (ecw)) - 1)
100
101 struct hostapd_config *conf;
102 struct hostapd_bss_config *bss;
103 const int aCWmin = 4, aCWmax = 10;
104 const struct hostapd_wmm_ac_params ac_bk =
105 { aCWmin, aCWmax, 7, 0, 0 }; /* background traffic */
106 const struct hostapd_wmm_ac_params ac_be =
107 { aCWmin, aCWmax, 3, 0, 0 }; /* best effort traffic */
108 const struct hostapd_wmm_ac_params ac_vi = /* video traffic */
109 { aCWmin - 1, aCWmin, 2, 3000 / 32, 0 };
110 const struct hostapd_wmm_ac_params ac_vo = /* voice traffic */
111 { aCWmin - 2, aCWmin - 1, 2, 1500 / 32, 0 };
112 const struct hostapd_tx_queue_params txq_bk =
113 { 7, ecw2cw(aCWmin), ecw2cw(aCWmax), 0 };
114 const struct hostapd_tx_queue_params txq_be =
115 { 3, ecw2cw(aCWmin), 4 * (ecw2cw(aCWmin) + 1) - 1, 0};
116 const struct hostapd_tx_queue_params txq_vi =
117 { 1, (ecw2cw(aCWmin) + 1) / 2 - 1, ecw2cw(aCWmin), 30};
118 const struct hostapd_tx_queue_params txq_vo =
119 { 1, (ecw2cw(aCWmin) + 1) / 4 - 1,
120 (ecw2cw(aCWmin) + 1) / 2 - 1, 15};
121
122 #undef ecw2cw
123
124 conf = os_zalloc(sizeof(*conf));
125 bss = os_zalloc(sizeof(*bss));
126 if (conf == NULL || bss == NULL) {
127 wpa_printf(MSG_ERROR, "Failed to allocate memory for "
128 "configuration data.");
129 os_free(conf);
130 os_free(bss);
131 return NULL;
132 }
133
134 bss->radius = os_zalloc(sizeof(*bss->radius));
135 if (bss->radius == NULL) {
136 os_free(conf);
137 os_free(bss);
138 return NULL;
139 }
140
141 hostapd_config_defaults_bss(bss);
142
143 conf->num_bss = 1;
144 conf->bss = bss;
145
146 conf->beacon_int = 100;
147 conf->rts_threshold = -1; /* use driver default: 2347 */
148 conf->fragm_threshold = -1; /* user driver default: 2346 */
149 conf->send_probe_response = 1;
150
151 conf->wmm_ac_params[0] = ac_be;
152 conf->wmm_ac_params[1] = ac_bk;
153 conf->wmm_ac_params[2] = ac_vi;
154 conf->wmm_ac_params[3] = ac_vo;
155
156 conf->tx_queue[0] = txq_vo;
157 conf->tx_queue[1] = txq_vi;
158 conf->tx_queue[2] = txq_be;
159 conf->tx_queue[3] = txq_bk;
160
161 conf->ht_capab = HT_CAP_INFO_SMPS_DISABLED;
162
163 conf->ap_table_max_size = 255;
164 conf->ap_table_expiration_time = 60;
165
166 #ifdef CONFIG_TESTING_OPTIONS
167 conf->ignore_probe_probability = 0.0d;
168 conf->ignore_auth_probability = 0.0d;
169 conf->ignore_assoc_probability = 0.0d;
170 conf->ignore_reassoc_probability = 0.0d;
171 conf->corrupt_gtk_rekey_mic_probability = 0.0d;
172 #endif /* CONFIG_TESTING_OPTIONS */
173
174 #ifdef CONFIG_ACS
175 conf->acs_num_scans = 5;
176 #endif /* CONFIG_ACS */
177
178 return conf;
179 }
180
181
hostapd_mac_comp(const void * a,const void * b)182 int hostapd_mac_comp(const void *a, const void *b)
183 {
184 return os_memcmp(a, b, sizeof(macaddr));
185 }
186
187
hostapd_mac_comp_empty(const void * a)188 int hostapd_mac_comp_empty(const void *a)
189 {
190 macaddr empty = { 0 };
191 return os_memcmp(a, empty, sizeof(macaddr));
192 }
193
194
hostapd_config_read_wpa_psk(const char * fname,struct hostapd_ssid * ssid)195 static int hostapd_config_read_wpa_psk(const char *fname,
196 struct hostapd_ssid *ssid)
197 {
198 FILE *f;
199 char buf[128], *pos;
200 int line = 0, ret = 0, len, ok;
201 u8 addr[ETH_ALEN];
202 struct hostapd_wpa_psk *psk;
203
204 if (!fname)
205 return 0;
206
207 f = fopen(fname, "r");
208 if (!f) {
209 wpa_printf(MSG_ERROR, "WPA PSK file '%s' not found.", fname);
210 return -1;
211 }
212
213 while (fgets(buf, sizeof(buf), f)) {
214 line++;
215
216 if (buf[0] == '#')
217 continue;
218 pos = buf;
219 while (*pos != '\0') {
220 if (*pos == '\n') {
221 *pos = '\0';
222 break;
223 }
224 pos++;
225 }
226 if (buf[0] == '\0')
227 continue;
228
229 if (hwaddr_aton(buf, addr)) {
230 wpa_printf(MSG_ERROR, "Invalid MAC address '%s' on "
231 "line %d in '%s'", buf, line, fname);
232 ret = -1;
233 break;
234 }
235
236 psk = os_zalloc(sizeof(*psk));
237 if (psk == NULL) {
238 wpa_printf(MSG_ERROR, "WPA PSK allocation failed");
239 ret = -1;
240 break;
241 }
242 if (is_zero_ether_addr(addr))
243 psk->group = 1;
244 else
245 os_memcpy(psk->addr, addr, ETH_ALEN);
246
247 pos = buf + 17;
248 if (*pos == '\0') {
249 wpa_printf(MSG_ERROR, "No PSK on line %d in '%s'",
250 line, fname);
251 os_free(psk);
252 ret = -1;
253 break;
254 }
255 pos++;
256
257 ok = 0;
258 len = os_strlen(pos);
259 if (len == 64 && hexstr2bin(pos, psk->psk, PMK_LEN) == 0)
260 ok = 1;
261 else if (len >= 8 && len < 64) {
262 pbkdf2_sha1(pos, ssid->ssid, ssid->ssid_len,
263 4096, psk->psk, PMK_LEN);
264 ok = 1;
265 }
266 if (!ok) {
267 wpa_printf(MSG_ERROR, "Invalid PSK '%s' on line %d in "
268 "'%s'", pos, line, fname);
269 os_free(psk);
270 ret = -1;
271 break;
272 }
273
274 psk->next = ssid->wpa_psk;
275 ssid->wpa_psk = psk;
276 }
277
278 fclose(f);
279
280 return ret;
281 }
282
283
hostapd_derive_psk(struct hostapd_ssid * ssid)284 static int hostapd_derive_psk(struct hostapd_ssid *ssid)
285 {
286 ssid->wpa_psk = os_zalloc(sizeof(struct hostapd_wpa_psk));
287 if (ssid->wpa_psk == NULL) {
288 wpa_printf(MSG_ERROR, "Unable to alloc space for PSK");
289 return -1;
290 }
291 wpa_hexdump_ascii(MSG_DEBUG, "SSID",
292 (u8 *) ssid->ssid, ssid->ssid_len);
293 wpa_hexdump_ascii_key(MSG_DEBUG, "PSK (ASCII passphrase)",
294 (u8 *) ssid->wpa_passphrase,
295 os_strlen(ssid->wpa_passphrase));
296 pbkdf2_sha1(ssid->wpa_passphrase,
297 ssid->ssid, ssid->ssid_len,
298 4096, ssid->wpa_psk->psk, PMK_LEN);
299 wpa_hexdump_key(MSG_DEBUG, "PSK (from passphrase)",
300 ssid->wpa_psk->psk, PMK_LEN);
301 return 0;
302 }
303
304
hostapd_setup_wpa_psk(struct hostapd_bss_config * conf)305 int hostapd_setup_wpa_psk(struct hostapd_bss_config *conf)
306 {
307 struct hostapd_ssid *ssid = &conf->ssid;
308
309 if (ssid->wpa_passphrase != NULL) {
310 if (ssid->wpa_psk != NULL) {
311 wpa_printf(MSG_DEBUG, "Using pre-configured WPA PSK "
312 "instead of passphrase");
313 } else {
314 wpa_printf(MSG_DEBUG, "Deriving WPA PSK based on "
315 "passphrase");
316 if (hostapd_derive_psk(ssid) < 0)
317 return -1;
318 }
319 ssid->wpa_psk->group = 1;
320 }
321
322 if (ssid->wpa_psk_file) {
323 if (hostapd_config_read_wpa_psk(ssid->wpa_psk_file,
324 &conf->ssid))
325 return -1;
326 }
327
328 return 0;
329 }
330
331
hostapd_wep_key_cmp(struct hostapd_wep_keys * a,struct hostapd_wep_keys * b)332 int hostapd_wep_key_cmp(struct hostapd_wep_keys *a, struct hostapd_wep_keys *b)
333 {
334 int i;
335
336 if (a->idx != b->idx || a->default_len != b->default_len)
337 return 1;
338 for (i = 0; i < NUM_WEP_KEYS; i++)
339 if (a->len[i] != b->len[i] ||
340 os_memcmp(a->key[i], b->key[i], a->len[i]) != 0)
341 return 1;
342 return 0;
343 }
344
345
hostapd_config_free_radius(struct hostapd_radius_server * servers,int num_servers)346 static void hostapd_config_free_radius(struct hostapd_radius_server *servers,
347 int num_servers)
348 {
349 int i;
350
351 for (i = 0; i < num_servers; i++) {
352 os_free(servers[i].shared_secret);
353 }
354 os_free(servers);
355 }
356
357
358 struct hostapd_radius_attr *
hostapd_config_get_radius_attr(struct hostapd_radius_attr * attr,u8 type)359 hostapd_config_get_radius_attr(struct hostapd_radius_attr *attr, u8 type)
360 {
361 for (; attr; attr = attr->next) {
362 if (attr->type == type)
363 return attr;
364 }
365 return NULL;
366 }
367
368
hostapd_config_free_radius_attr(struct hostapd_radius_attr * attr)369 static void hostapd_config_free_radius_attr(struct hostapd_radius_attr *attr)
370 {
371 struct hostapd_radius_attr *prev;
372
373 while (attr) {
374 prev = attr;
375 attr = attr->next;
376 wpabuf_free(prev->val);
377 os_free(prev);
378 }
379 }
380
381
hostapd_config_free_eap_user(struct hostapd_eap_user * user)382 static void hostapd_config_free_eap_user(struct hostapd_eap_user *user)
383 {
384 os_free(user->identity);
385 os_free(user->password);
386 os_free(user);
387 }
388
389
hostapd_config_free_wep(struct hostapd_wep_keys * keys)390 static void hostapd_config_free_wep(struct hostapd_wep_keys *keys)
391 {
392 int i;
393 for (i = 0; i < NUM_WEP_KEYS; i++) {
394 os_free(keys->key[i]);
395 keys->key[i] = NULL;
396 }
397 }
398
399
hostapd_config_free_bss(struct hostapd_bss_config * conf)400 static void hostapd_config_free_bss(struct hostapd_bss_config *conf)
401 {
402 struct hostapd_wpa_psk *psk, *prev;
403 struct hostapd_eap_user *user, *prev_user;
404
405 if (conf == NULL)
406 return;
407
408 psk = conf->ssid.wpa_psk;
409 while (psk) {
410 prev = psk;
411 psk = psk->next;
412 os_free(prev);
413 }
414
415 os_free(conf->ssid.wpa_passphrase);
416 os_free(conf->ssid.wpa_psk_file);
417 hostapd_config_free_wep(&conf->ssid.wep);
418 #ifdef CONFIG_FULL_DYNAMIC_VLAN
419 os_free(conf->ssid.vlan_tagged_interface);
420 #endif /* CONFIG_FULL_DYNAMIC_VLAN */
421
422 user = conf->eap_user;
423 while (user) {
424 prev_user = user;
425 user = user->next;
426 hostapd_config_free_eap_user(prev_user);
427 }
428 os_free(conf->eap_user_sqlite);
429
430 os_free(conf->dump_log_name);
431 os_free(conf->eap_req_id_text);
432 os_free(conf->accept_mac);
433 os_free(conf->deny_mac);
434 os_free(conf->nas_identifier);
435 hostapd_config_free_radius(conf->radius->auth_servers,
436 conf->radius->num_auth_servers);
437 hostapd_config_free_radius(conf->radius->acct_servers,
438 conf->radius->num_acct_servers);
439 hostapd_config_free_radius_attr(conf->radius_auth_req_attr);
440 hostapd_config_free_radius_attr(conf->radius_acct_req_attr);
441 os_free(conf->rsn_preauth_interfaces);
442 os_free(conf->ctrl_interface);
443 os_free(conf->ca_cert);
444 os_free(conf->server_cert);
445 os_free(conf->private_key);
446 os_free(conf->private_key_passwd);
447 os_free(conf->ocsp_stapling_response);
448 os_free(conf->dh_file);
449 os_free(conf->pac_opaque_encr_key);
450 os_free(conf->eap_fast_a_id);
451 os_free(conf->eap_fast_a_id_info);
452 os_free(conf->eap_sim_db);
453 os_free(conf->radius_server_clients);
454 os_free(conf->test_socket);
455 os_free(conf->radius);
456 os_free(conf->radius_das_shared_secret);
457 hostapd_config_free_vlan(conf);
458 os_free(conf->time_zone);
459
460 #ifdef CONFIG_IEEE80211R
461 {
462 struct ft_remote_r0kh *r0kh, *r0kh_prev;
463 struct ft_remote_r1kh *r1kh, *r1kh_prev;
464
465 r0kh = conf->r0kh_list;
466 conf->r0kh_list = NULL;
467 while (r0kh) {
468 r0kh_prev = r0kh;
469 r0kh = r0kh->next;
470 os_free(r0kh_prev);
471 }
472
473 r1kh = conf->r1kh_list;
474 conf->r1kh_list = NULL;
475 while (r1kh) {
476 r1kh_prev = r1kh;
477 r1kh = r1kh->next;
478 os_free(r1kh_prev);
479 }
480 }
481 #endif /* CONFIG_IEEE80211R */
482
483 #ifdef CONFIG_WPS
484 os_free(conf->wps_pin_requests);
485 os_free(conf->device_name);
486 os_free(conf->manufacturer);
487 os_free(conf->model_name);
488 os_free(conf->model_number);
489 os_free(conf->serial_number);
490 os_free(conf->config_methods);
491 os_free(conf->ap_pin);
492 os_free(conf->extra_cred);
493 os_free(conf->ap_settings);
494 os_free(conf->upnp_iface);
495 os_free(conf->friendly_name);
496 os_free(conf->manufacturer_url);
497 os_free(conf->model_description);
498 os_free(conf->model_url);
499 os_free(conf->upc);
500 wpabuf_free(conf->wps_nfc_dh_pubkey);
501 wpabuf_free(conf->wps_nfc_dh_privkey);
502 wpabuf_free(conf->wps_nfc_dev_pw);
503 #endif /* CONFIG_WPS */
504
505 os_free(conf->roaming_consortium);
506 os_free(conf->venue_name);
507 os_free(conf->nai_realm_data);
508 os_free(conf->network_auth_type);
509 os_free(conf->anqp_3gpp_cell_net);
510 os_free(conf->domain_name);
511
512 #ifdef CONFIG_RADIUS_TEST
513 os_free(conf->dump_msk_file);
514 #endif /* CONFIG_RADIUS_TEST */
515
516 #ifdef CONFIG_HS20
517 os_free(conf->hs20_oper_friendly_name);
518 os_free(conf->hs20_wan_metrics);
519 os_free(conf->hs20_connection_capability);
520 os_free(conf->hs20_operating_class);
521 #endif /* CONFIG_HS20 */
522
523 wpabuf_free(conf->vendor_elements);
524
525 os_free(conf->sae_groups);
526
527 os_free(conf->server_id);
528 }
529
530
531 /**
532 * hostapd_config_free - Free hostapd configuration
533 * @conf: Configuration data from hostapd_config_read().
534 */
hostapd_config_free(struct hostapd_config * conf)535 void hostapd_config_free(struct hostapd_config *conf)
536 {
537 size_t i;
538
539 if (conf == NULL)
540 return;
541
542 for (i = 0; i < conf->num_bss; i++)
543 hostapd_config_free_bss(&conf->bss[i]);
544 os_free(conf->bss);
545 os_free(conf->supported_rates);
546 os_free(conf->basic_rates);
547
548 os_free(conf);
549 }
550
551
552 /**
553 * hostapd_maclist_found - Find a MAC address from a list
554 * @list: MAC address list
555 * @num_entries: Number of addresses in the list
556 * @addr: Address to search for
557 * @vlan_id: Buffer for returning VLAN ID or %NULL if not needed
558 * Returns: 1 if address is in the list or 0 if not.
559 *
560 * Perform a binary search for given MAC address from a pre-sorted list.
561 */
hostapd_maclist_found(struct mac_acl_entry * list,int num_entries,const u8 * addr,int * vlan_id)562 int hostapd_maclist_found(struct mac_acl_entry *list, int num_entries,
563 const u8 *addr, int *vlan_id)
564 {
565 int start, end, middle, res;
566
567 start = 0;
568 end = num_entries - 1;
569
570 while (start <= end) {
571 middle = (start + end) / 2;
572 res = os_memcmp(list[middle].addr, addr, ETH_ALEN);
573 if (res == 0) {
574 if (vlan_id)
575 *vlan_id = list[middle].vlan_id;
576 return 1;
577 }
578 if (res < 0)
579 start = middle + 1;
580 else
581 end = middle - 1;
582 }
583
584 return 0;
585 }
586
587
hostapd_rate_found(int * list,int rate)588 int hostapd_rate_found(int *list, int rate)
589 {
590 int i;
591
592 if (list == NULL)
593 return 0;
594
595 for (i = 0; list[i] >= 0; i++)
596 if (list[i] == rate)
597 return 1;
598
599 return 0;
600 }
601
602
hostapd_vlan_id_valid(struct hostapd_vlan * vlan,int vlan_id)603 int hostapd_vlan_id_valid(struct hostapd_vlan *vlan, int vlan_id)
604 {
605 struct hostapd_vlan *v = vlan;
606 while (v) {
607 if (v->vlan_id == vlan_id || v->vlan_id == VLAN_ID_WILDCARD)
608 return 1;
609 v = v->next;
610 }
611 return 0;
612 }
613
614
hostapd_get_vlan_id_ifname(struct hostapd_vlan * vlan,int vlan_id)615 const char * hostapd_get_vlan_id_ifname(struct hostapd_vlan *vlan, int vlan_id)
616 {
617 struct hostapd_vlan *v = vlan;
618 while (v) {
619 if (v->vlan_id == vlan_id)
620 return v->ifname;
621 v = v->next;
622 }
623 return NULL;
624 }
625
626
hostapd_get_psk(const struct hostapd_bss_config * conf,const u8 * addr,const u8 * p2p_dev_addr,const u8 * prev_psk)627 const u8 * hostapd_get_psk(const struct hostapd_bss_config *conf,
628 const u8 *addr, const u8 *p2p_dev_addr,
629 const u8 *prev_psk)
630 {
631 struct hostapd_wpa_psk *psk;
632 int next_ok = prev_psk == NULL;
633
634 if (p2p_dev_addr) {
635 wpa_printf(MSG_DEBUG, "Searching a PSK for " MACSTR
636 " p2p_dev_addr=" MACSTR " prev_psk=%p",
637 MAC2STR(addr), MAC2STR(p2p_dev_addr), prev_psk);
638 if (!is_zero_ether_addr(p2p_dev_addr))
639 addr = NULL; /* Use P2P Device Address for matching */
640 } else {
641 wpa_printf(MSG_DEBUG, "Searching a PSK for " MACSTR
642 " prev_psk=%p",
643 MAC2STR(addr), prev_psk);
644 }
645
646 for (psk = conf->ssid.wpa_psk; psk != NULL; psk = psk->next) {
647 if (next_ok &&
648 (psk->group ||
649 (addr && os_memcmp(psk->addr, addr, ETH_ALEN) == 0) ||
650 (!addr && p2p_dev_addr &&
651 os_memcmp(psk->p2p_dev_addr, p2p_dev_addr, ETH_ALEN) ==
652 0)))
653 return psk->psk;
654
655 if (psk->psk == prev_psk)
656 next_ok = 1;
657 }
658
659 return NULL;
660 }
661