1 /*
2 * hostapd / Configuration helper functions
3 * Copyright (c) 2003-2012, 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 return conf;
167 }
168
169
hostapd_mac_comp(const void * a,const void * b)170 int hostapd_mac_comp(const void *a, const void *b)
171 {
172 return os_memcmp(a, b, sizeof(macaddr));
173 }
174
175
hostapd_mac_comp_empty(const void * a)176 int hostapd_mac_comp_empty(const void *a)
177 {
178 macaddr empty = { 0 };
179 return os_memcmp(a, empty, sizeof(macaddr));
180 }
181
182
hostapd_config_read_wpa_psk(const char * fname,struct hostapd_ssid * ssid)183 static int hostapd_config_read_wpa_psk(const char *fname,
184 struct hostapd_ssid *ssid)
185 {
186 FILE *f;
187 char buf[128], *pos;
188 int line = 0, ret = 0, len, ok;
189 u8 addr[ETH_ALEN];
190 struct hostapd_wpa_psk *psk;
191
192 if (!fname)
193 return 0;
194
195 f = fopen(fname, "r");
196 if (!f) {
197 wpa_printf(MSG_ERROR, "WPA PSK file '%s' not found.", fname);
198 return -1;
199 }
200
201 while (fgets(buf, sizeof(buf), f)) {
202 line++;
203
204 if (buf[0] == '#')
205 continue;
206 pos = buf;
207 while (*pos != '\0') {
208 if (*pos == '\n') {
209 *pos = '\0';
210 break;
211 }
212 pos++;
213 }
214 if (buf[0] == '\0')
215 continue;
216
217 if (hwaddr_aton(buf, addr)) {
218 wpa_printf(MSG_ERROR, "Invalid MAC address '%s' on "
219 "line %d in '%s'", buf, line, fname);
220 ret = -1;
221 break;
222 }
223
224 psk = os_zalloc(sizeof(*psk));
225 if (psk == NULL) {
226 wpa_printf(MSG_ERROR, "WPA PSK allocation failed");
227 ret = -1;
228 break;
229 }
230 if (is_zero_ether_addr(addr))
231 psk->group = 1;
232 else
233 os_memcpy(psk->addr, addr, ETH_ALEN);
234
235 pos = buf + 17;
236 if (*pos == '\0') {
237 wpa_printf(MSG_ERROR, "No PSK on line %d in '%s'",
238 line, fname);
239 os_free(psk);
240 ret = -1;
241 break;
242 }
243 pos++;
244
245 ok = 0;
246 len = os_strlen(pos);
247 if (len == 64 && hexstr2bin(pos, psk->psk, PMK_LEN) == 0)
248 ok = 1;
249 else if (len >= 8 && len < 64) {
250 pbkdf2_sha1(pos, ssid->ssid, ssid->ssid_len,
251 4096, psk->psk, PMK_LEN);
252 ok = 1;
253 }
254 if (!ok) {
255 wpa_printf(MSG_ERROR, "Invalid PSK '%s' on line %d in "
256 "'%s'", pos, line, fname);
257 os_free(psk);
258 ret = -1;
259 break;
260 }
261
262 psk->next = ssid->wpa_psk;
263 ssid->wpa_psk = psk;
264 }
265
266 fclose(f);
267
268 return ret;
269 }
270
271
hostapd_derive_psk(struct hostapd_ssid * ssid)272 static int hostapd_derive_psk(struct hostapd_ssid *ssid)
273 {
274 ssid->wpa_psk = os_zalloc(sizeof(struct hostapd_wpa_psk));
275 if (ssid->wpa_psk == NULL) {
276 wpa_printf(MSG_ERROR, "Unable to alloc space for PSK");
277 return -1;
278 }
279 wpa_hexdump_ascii(MSG_DEBUG, "SSID",
280 (u8 *) ssid->ssid, ssid->ssid_len);
281 wpa_hexdump_ascii_key(MSG_DEBUG, "PSK (ASCII passphrase)",
282 (u8 *) ssid->wpa_passphrase,
283 os_strlen(ssid->wpa_passphrase));
284 pbkdf2_sha1(ssid->wpa_passphrase,
285 ssid->ssid, ssid->ssid_len,
286 4096, ssid->wpa_psk->psk, PMK_LEN);
287 wpa_hexdump_key(MSG_DEBUG, "PSK (from passphrase)",
288 ssid->wpa_psk->psk, PMK_LEN);
289 return 0;
290 }
291
292
hostapd_setup_wpa_psk(struct hostapd_bss_config * conf)293 int hostapd_setup_wpa_psk(struct hostapd_bss_config *conf)
294 {
295 struct hostapd_ssid *ssid = &conf->ssid;
296
297 if (ssid->wpa_passphrase != NULL) {
298 if (ssid->wpa_psk != NULL) {
299 wpa_printf(MSG_DEBUG, "Using pre-configured WPA PSK "
300 "instead of passphrase");
301 } else {
302 wpa_printf(MSG_DEBUG, "Deriving WPA PSK based on "
303 "passphrase");
304 if (hostapd_derive_psk(ssid) < 0)
305 return -1;
306 }
307 ssid->wpa_psk->group = 1;
308 }
309
310 if (ssid->wpa_psk_file) {
311 if (hostapd_config_read_wpa_psk(ssid->wpa_psk_file,
312 &conf->ssid))
313 return -1;
314 }
315
316 return 0;
317 }
318
319
hostapd_wep_key_cmp(struct hostapd_wep_keys * a,struct hostapd_wep_keys * b)320 int hostapd_wep_key_cmp(struct hostapd_wep_keys *a, struct hostapd_wep_keys *b)
321 {
322 int i;
323
324 if (a->idx != b->idx || a->default_len != b->default_len)
325 return 1;
326 for (i = 0; i < NUM_WEP_KEYS; i++)
327 if (a->len[i] != b->len[i] ||
328 os_memcmp(a->key[i], b->key[i], a->len[i]) != 0)
329 return 1;
330 return 0;
331 }
332
333
hostapd_config_free_radius(struct hostapd_radius_server * servers,int num_servers)334 static void hostapd_config_free_radius(struct hostapd_radius_server *servers,
335 int num_servers)
336 {
337 int i;
338
339 for (i = 0; i < num_servers; i++) {
340 os_free(servers[i].shared_secret);
341 }
342 os_free(servers);
343 }
344
345
346 struct hostapd_radius_attr *
hostapd_config_get_radius_attr(struct hostapd_radius_attr * attr,u8 type)347 hostapd_config_get_radius_attr(struct hostapd_radius_attr *attr, u8 type)
348 {
349 for (; attr; attr = attr->next) {
350 if (attr->type == type)
351 return attr;
352 }
353 return NULL;
354 }
355
356
hostapd_config_free_radius_attr(struct hostapd_radius_attr * attr)357 static void hostapd_config_free_radius_attr(struct hostapd_radius_attr *attr)
358 {
359 struct hostapd_radius_attr *prev;
360
361 while (attr) {
362 prev = attr;
363 attr = attr->next;
364 wpabuf_free(prev->val);
365 os_free(prev);
366 }
367 }
368
369
hostapd_config_free_eap_user(struct hostapd_eap_user * user)370 static void hostapd_config_free_eap_user(struct hostapd_eap_user *user)
371 {
372 os_free(user->identity);
373 os_free(user->password);
374 os_free(user);
375 }
376
377
hostapd_config_free_wep(struct hostapd_wep_keys * keys)378 static void hostapd_config_free_wep(struct hostapd_wep_keys *keys)
379 {
380 int i;
381 for (i = 0; i < NUM_WEP_KEYS; i++) {
382 os_free(keys->key[i]);
383 keys->key[i] = NULL;
384 }
385 }
386
387
hostapd_config_free_bss(struct hostapd_bss_config * conf)388 static void hostapd_config_free_bss(struct hostapd_bss_config *conf)
389 {
390 struct hostapd_wpa_psk *psk, *prev;
391 struct hostapd_eap_user *user, *prev_user;
392
393 if (conf == NULL)
394 return;
395
396 psk = conf->ssid.wpa_psk;
397 while (psk) {
398 prev = psk;
399 psk = psk->next;
400 os_free(prev);
401 }
402
403 os_free(conf->ssid.wpa_passphrase);
404 os_free(conf->ssid.wpa_psk_file);
405 hostapd_config_free_wep(&conf->ssid.wep);
406 #ifdef CONFIG_FULL_DYNAMIC_VLAN
407 os_free(conf->ssid.vlan_tagged_interface);
408 #endif /* CONFIG_FULL_DYNAMIC_VLAN */
409
410 user = conf->eap_user;
411 while (user) {
412 prev_user = user;
413 user = user->next;
414 hostapd_config_free_eap_user(prev_user);
415 }
416 os_free(conf->eap_user_sqlite);
417
418 os_free(conf->dump_log_name);
419 os_free(conf->eap_req_id_text);
420 os_free(conf->accept_mac);
421 os_free(conf->deny_mac);
422 os_free(conf->nas_identifier);
423 hostapd_config_free_radius(conf->radius->auth_servers,
424 conf->radius->num_auth_servers);
425 hostapd_config_free_radius(conf->radius->acct_servers,
426 conf->radius->num_acct_servers);
427 hostapd_config_free_radius_attr(conf->radius_auth_req_attr);
428 hostapd_config_free_radius_attr(conf->radius_acct_req_attr);
429 os_free(conf->rsn_preauth_interfaces);
430 os_free(conf->ctrl_interface);
431 os_free(conf->ca_cert);
432 os_free(conf->server_cert);
433 os_free(conf->private_key);
434 os_free(conf->private_key_passwd);
435 os_free(conf->dh_file);
436 os_free(conf->pac_opaque_encr_key);
437 os_free(conf->eap_fast_a_id);
438 os_free(conf->eap_fast_a_id_info);
439 os_free(conf->eap_sim_db);
440 os_free(conf->radius_server_clients);
441 os_free(conf->test_socket);
442 os_free(conf->radius);
443 os_free(conf->radius_das_shared_secret);
444 hostapd_config_free_vlan(conf);
445 if (conf->ssid.dyn_vlan_keys) {
446 struct hostapd_ssid *ssid = &conf->ssid;
447 size_t i;
448 for (i = 0; i <= ssid->max_dyn_vlan_keys; i++) {
449 if (ssid->dyn_vlan_keys[i] == NULL)
450 continue;
451 hostapd_config_free_wep(ssid->dyn_vlan_keys[i]);
452 os_free(ssid->dyn_vlan_keys[i]);
453 }
454 os_free(ssid->dyn_vlan_keys);
455 ssid->dyn_vlan_keys = NULL;
456 }
457
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
528
529 /**
530 * hostapd_config_free - Free hostapd configuration
531 * @conf: Configuration data from hostapd_config_read().
532 */
hostapd_config_free(struct hostapd_config * conf)533 void hostapd_config_free(struct hostapd_config *conf)
534 {
535 size_t i;
536
537 if (conf == NULL)
538 return;
539
540 for (i = 0; i < conf->num_bss; i++)
541 hostapd_config_free_bss(&conf->bss[i]);
542 os_free(conf->bss);
543 os_free(conf->supported_rates);
544 os_free(conf->basic_rates);
545
546 os_free(conf);
547 }
548
549
550 /**
551 * hostapd_maclist_found - Find a MAC address from a list
552 * @list: MAC address list
553 * @num_entries: Number of addresses in the list
554 * @addr: Address to search for
555 * @vlan_id: Buffer for returning VLAN ID or %NULL if not needed
556 * Returns: 1 if address is in the list or 0 if not.
557 *
558 * Perform a binary search for given MAC address from a pre-sorted list.
559 */
hostapd_maclist_found(struct mac_acl_entry * list,int num_entries,const u8 * addr,int * vlan_id)560 int hostapd_maclist_found(struct mac_acl_entry *list, int num_entries,
561 const u8 *addr, int *vlan_id)
562 {
563 int start, end, middle, res;
564
565 start = 0;
566 end = num_entries - 1;
567
568 while (start <= end) {
569 middle = (start + end) / 2;
570 res = os_memcmp(list[middle].addr, addr, ETH_ALEN);
571 if (res == 0) {
572 if (vlan_id)
573 *vlan_id = list[middle].vlan_id;
574 return 1;
575 }
576 if (res < 0)
577 start = middle + 1;
578 else
579 end = middle - 1;
580 }
581
582 return 0;
583 }
584
585
hostapd_rate_found(int * list,int rate)586 int hostapd_rate_found(int *list, int rate)
587 {
588 int i;
589
590 if (list == NULL)
591 return 0;
592
593 for (i = 0; list[i] >= 0; i++)
594 if (list[i] == rate)
595 return 1;
596
597 return 0;
598 }
599
600
hostapd_get_vlan_id_ifname(struct hostapd_vlan * vlan,int vlan_id)601 const char * hostapd_get_vlan_id_ifname(struct hostapd_vlan *vlan, int vlan_id)
602 {
603 struct hostapd_vlan *v = vlan;
604 while (v) {
605 if (v->vlan_id == vlan_id || v->vlan_id == VLAN_ID_WILDCARD)
606 return v->ifname;
607 v = v->next;
608 }
609 return NULL;
610 }
611
612
hostapd_get_psk(const struct hostapd_bss_config * conf,const u8 * addr,const u8 * prev_psk)613 const u8 * hostapd_get_psk(const struct hostapd_bss_config *conf,
614 const u8 *addr, const u8 *prev_psk)
615 {
616 struct hostapd_wpa_psk *psk;
617 int next_ok = prev_psk == NULL;
618
619 for (psk = conf->ssid.wpa_psk; psk != NULL; psk = psk->next) {
620 if (next_ok &&
621 (psk->group || os_memcmp(psk->addr, addr, ETH_ALEN) == 0))
622 return psk->psk;
623
624 if (psk->psk == prev_psk)
625 next_ok = 1;
626 }
627
628 return NULL;
629 }
630