1 /*
2 * hostapd / WPA authenticator glue code
3 * Copyright (c) 2002-2012, 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 "utils/eloop.h"
13 #include "utils/list.h"
14 #include "common/ieee802_11_defs.h"
15 #include "common/sae.h"
16 #include "common/wpa_ctrl.h"
17 #include "crypto/sha1.h"
18 #include "eapol_auth/eapol_auth_sm.h"
19 #include "eapol_auth/eapol_auth_sm_i.h"
20 #include "eap_server/eap.h"
21 #include "l2_packet/l2_packet.h"
22 #include "eth_p_oui.h"
23 #include "hostapd.h"
24 #include "ieee802_1x.h"
25 #include "preauth_auth.h"
26 #include "sta_info.h"
27 #include "tkip_countermeasures.h"
28 #include "ap_drv_ops.h"
29 #include "ap_config.h"
30 #include "pmksa_cache_auth.h"
31 #include "wpa_auth.h"
32 #include "wpa_auth_glue.h"
33
34
hostapd_wpa_auth_conf(struct hostapd_bss_config * conf,struct hostapd_config * iconf,struct wpa_auth_config * wconf)35 static void hostapd_wpa_auth_conf(struct hostapd_bss_config *conf,
36 struct hostapd_config *iconf,
37 struct wpa_auth_config *wconf)
38 {
39 os_memset(wconf, 0, sizeof(*wconf));
40 wconf->wpa = conf->wpa;
41 wconf->wpa_key_mgmt = conf->wpa_key_mgmt;
42 wconf->wpa_pairwise = conf->wpa_pairwise;
43 wconf->wpa_group = conf->wpa_group;
44 wconf->wpa_group_rekey = conf->wpa_group_rekey;
45 wconf->wpa_strict_rekey = conf->wpa_strict_rekey;
46 wconf->wpa_gmk_rekey = conf->wpa_gmk_rekey;
47 wconf->wpa_ptk_rekey = conf->wpa_ptk_rekey;
48 wconf->wpa_group_update_count = conf->wpa_group_update_count;
49 wconf->wpa_disable_eapol_key_retries =
50 conf->wpa_disable_eapol_key_retries;
51 wconf->wpa_pairwise_update_count = conf->wpa_pairwise_update_count;
52 wconf->rsn_pairwise = conf->rsn_pairwise;
53 wconf->rsn_preauth = conf->rsn_preauth;
54 wconf->eapol_version = conf->eapol_version;
55 wconf->wmm_enabled = conf->wmm_enabled;
56 wconf->wmm_uapsd = conf->wmm_uapsd;
57 wconf->disable_pmksa_caching = conf->disable_pmksa_caching;
58 wconf->okc = conf->okc;
59 #ifdef CONFIG_IEEE80211W
60 wconf->ieee80211w = conf->ieee80211w;
61 wconf->group_mgmt_cipher = conf->group_mgmt_cipher;
62 #endif /* CONFIG_IEEE80211W */
63 #ifdef CONFIG_IEEE80211R_AP
64 wconf->ssid_len = conf->ssid.ssid_len;
65 if (wconf->ssid_len > SSID_MAX_LEN)
66 wconf->ssid_len = SSID_MAX_LEN;
67 os_memcpy(wconf->ssid, conf->ssid.ssid, wconf->ssid_len);
68 os_memcpy(wconf->mobility_domain, conf->mobility_domain,
69 MOBILITY_DOMAIN_ID_LEN);
70 if (conf->nas_identifier &&
71 os_strlen(conf->nas_identifier) <= FT_R0KH_ID_MAX_LEN) {
72 wconf->r0_key_holder_len = os_strlen(conf->nas_identifier);
73 os_memcpy(wconf->r0_key_holder, conf->nas_identifier,
74 wconf->r0_key_holder_len);
75 }
76 os_memcpy(wconf->r1_key_holder, conf->r1_key_holder, FT_R1KH_ID_LEN);
77 wconf->r0_key_lifetime = conf->r0_key_lifetime;
78 wconf->reassociation_deadline = conf->reassociation_deadline;
79 wconf->rkh_pos_timeout = conf->rkh_pos_timeout;
80 wconf->rkh_neg_timeout = conf->rkh_neg_timeout;
81 wconf->rkh_pull_timeout = conf->rkh_pull_timeout;
82 wconf->rkh_pull_retries = conf->rkh_pull_retries;
83 wconf->r0kh_list = &conf->r0kh_list;
84 wconf->r1kh_list = &conf->r1kh_list;
85 wconf->pmk_r1_push = conf->pmk_r1_push;
86 wconf->ft_over_ds = conf->ft_over_ds;
87 wconf->ft_psk_generate_local = conf->ft_psk_generate_local;
88 #endif /* CONFIG_IEEE80211R_AP */
89 #ifdef CONFIG_HS20
90 wconf->disable_gtk = conf->disable_dgaf;
91 if (conf->osen) {
92 wconf->disable_gtk = 1;
93 wconf->wpa = WPA_PROTO_OSEN;
94 wconf->wpa_key_mgmt = WPA_KEY_MGMT_OSEN;
95 wconf->wpa_pairwise = 0;
96 wconf->wpa_group = WPA_CIPHER_CCMP;
97 wconf->rsn_pairwise = WPA_CIPHER_CCMP;
98 wconf->rsn_preauth = 0;
99 wconf->disable_pmksa_caching = 1;
100 #ifdef CONFIG_IEEE80211W
101 wconf->ieee80211w = 1;
102 #endif /* CONFIG_IEEE80211W */
103 }
104 #endif /* CONFIG_HS20 */
105 #ifdef CONFIG_TESTING_OPTIONS
106 wconf->corrupt_gtk_rekey_mic_probability =
107 iconf->corrupt_gtk_rekey_mic_probability;
108 if (conf->own_ie_override &&
109 wpabuf_len(conf->own_ie_override) <= MAX_OWN_IE_OVERRIDE) {
110 wconf->own_ie_override_len = wpabuf_len(conf->own_ie_override);
111 os_memcpy(wconf->own_ie_override,
112 wpabuf_head(conf->own_ie_override),
113 wconf->own_ie_override_len);
114 }
115 #endif /* CONFIG_TESTING_OPTIONS */
116 #ifdef CONFIG_P2P
117 os_memcpy(wconf->ip_addr_go, conf->ip_addr_go, 4);
118 os_memcpy(wconf->ip_addr_mask, conf->ip_addr_mask, 4);
119 os_memcpy(wconf->ip_addr_start, conf->ip_addr_start, 4);
120 os_memcpy(wconf->ip_addr_end, conf->ip_addr_end, 4);
121 #endif /* CONFIG_P2P */
122 #ifdef CONFIG_FILS
123 wconf->fils_cache_id_set = conf->fils_cache_id_set;
124 os_memcpy(wconf->fils_cache_id, conf->fils_cache_id,
125 FILS_CACHE_ID_LEN);
126 #endif /* CONFIG_FILS */
127 }
128
129
hostapd_wpa_auth_logger(void * ctx,const u8 * addr,logger_level level,const char * txt)130 static void hostapd_wpa_auth_logger(void *ctx, const u8 *addr,
131 logger_level level, const char *txt)
132 {
133 #ifndef CONFIG_NO_HOSTAPD_LOGGER
134 struct hostapd_data *hapd = ctx;
135 int hlevel;
136
137 switch (level) {
138 case LOGGER_WARNING:
139 hlevel = HOSTAPD_LEVEL_WARNING;
140 break;
141 case LOGGER_INFO:
142 hlevel = HOSTAPD_LEVEL_INFO;
143 break;
144 case LOGGER_DEBUG:
145 default:
146 hlevel = HOSTAPD_LEVEL_DEBUG;
147 break;
148 }
149
150 hostapd_logger(hapd, addr, HOSTAPD_MODULE_WPA, hlevel, "%s", txt);
151 #endif /* CONFIG_NO_HOSTAPD_LOGGER */
152 }
153
154
hostapd_wpa_auth_disconnect(void * ctx,const u8 * addr,u16 reason)155 static void hostapd_wpa_auth_disconnect(void *ctx, const u8 *addr,
156 u16 reason)
157 {
158 struct hostapd_data *hapd = ctx;
159 wpa_printf(MSG_DEBUG, "%s: WPA authenticator requests disconnect: "
160 "STA " MACSTR " reason %d",
161 __func__, MAC2STR(addr), reason);
162 ap_sta_disconnect(hapd, NULL, addr, reason);
163 }
164
165
hostapd_wpa_auth_mic_failure_report(void * ctx,const u8 * addr)166 static int hostapd_wpa_auth_mic_failure_report(void *ctx, const u8 *addr)
167 {
168 struct hostapd_data *hapd = ctx;
169 return michael_mic_failure(hapd, addr, 0);
170 }
171
172
hostapd_wpa_auth_psk_failure_report(void * ctx,const u8 * addr)173 static void hostapd_wpa_auth_psk_failure_report(void *ctx, const u8 *addr)
174 {
175 struct hostapd_data *hapd = ctx;
176 wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_POSSIBLE_PSK_MISMATCH MACSTR,
177 MAC2STR(addr));
178 }
179
180
hostapd_wpa_auth_set_eapol(void * ctx,const u8 * addr,wpa_eapol_variable var,int value)181 static void hostapd_wpa_auth_set_eapol(void *ctx, const u8 *addr,
182 wpa_eapol_variable var, int value)
183 {
184 struct hostapd_data *hapd = ctx;
185 struct sta_info *sta = ap_get_sta(hapd, addr);
186 if (sta == NULL)
187 return;
188 switch (var) {
189 case WPA_EAPOL_portEnabled:
190 ieee802_1x_notify_port_enabled(sta->eapol_sm, value);
191 break;
192 case WPA_EAPOL_portValid:
193 ieee802_1x_notify_port_valid(sta->eapol_sm, value);
194 break;
195 case WPA_EAPOL_authorized:
196 ieee802_1x_set_sta_authorized(hapd, sta, value);
197 break;
198 case WPA_EAPOL_portControl_Auto:
199 if (sta->eapol_sm)
200 sta->eapol_sm->portControl = Auto;
201 break;
202 case WPA_EAPOL_keyRun:
203 if (sta->eapol_sm)
204 sta->eapol_sm->keyRun = value ? TRUE : FALSE;
205 break;
206 case WPA_EAPOL_keyAvailable:
207 if (sta->eapol_sm)
208 sta->eapol_sm->eap_if->eapKeyAvailable =
209 value ? TRUE : FALSE;
210 break;
211 case WPA_EAPOL_keyDone:
212 if (sta->eapol_sm)
213 sta->eapol_sm->keyDone = value ? TRUE : FALSE;
214 break;
215 case WPA_EAPOL_inc_EapolFramesTx:
216 if (sta->eapol_sm)
217 sta->eapol_sm->dot1xAuthEapolFramesTx++;
218 break;
219 }
220 }
221
222
hostapd_wpa_auth_get_eapol(void * ctx,const u8 * addr,wpa_eapol_variable var)223 static int hostapd_wpa_auth_get_eapol(void *ctx, const u8 *addr,
224 wpa_eapol_variable var)
225 {
226 struct hostapd_data *hapd = ctx;
227 struct sta_info *sta = ap_get_sta(hapd, addr);
228 if (sta == NULL || sta->eapol_sm == NULL)
229 return -1;
230 switch (var) {
231 case WPA_EAPOL_keyRun:
232 return sta->eapol_sm->keyRun;
233 case WPA_EAPOL_keyAvailable:
234 return sta->eapol_sm->eap_if->eapKeyAvailable;
235 default:
236 return -1;
237 }
238 }
239
240
hostapd_wpa_auth_get_psk(void * ctx,const u8 * addr,const u8 * p2p_dev_addr,const u8 * prev_psk,size_t * psk_len)241 static const u8 * hostapd_wpa_auth_get_psk(void *ctx, const u8 *addr,
242 const u8 *p2p_dev_addr,
243 const u8 *prev_psk, size_t *psk_len)
244 {
245 struct hostapd_data *hapd = ctx;
246 struct sta_info *sta = ap_get_sta(hapd, addr);
247 const u8 *psk;
248
249 if (psk_len)
250 *psk_len = PMK_LEN;
251
252 #ifdef CONFIG_SAE
253 if (sta && sta->auth_alg == WLAN_AUTH_SAE) {
254 if (!sta->sae || prev_psk)
255 return NULL;
256 return sta->sae->pmk;
257 }
258 if (sta && wpa_auth_uses_sae(sta->wpa_sm)) {
259 wpa_printf(MSG_DEBUG,
260 "No PSK for STA trying to use SAE with PMKSA caching");
261 return NULL;
262 }
263 #endif /* CONFIG_SAE */
264
265 #ifdef CONFIG_OWE
266 if ((hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_OWE) &&
267 sta && sta->owe_pmk) {
268 if (psk_len)
269 *psk_len = sta->owe_pmk_len;
270 return sta->owe_pmk;
271 }
272 if ((hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_OWE) && sta) {
273 struct rsn_pmksa_cache_entry *sa;
274
275 sa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
276 if (sa && sa->akmp == WPA_KEY_MGMT_OWE) {
277 if (psk_len)
278 *psk_len = sa->pmk_len;
279 return sa->pmk;
280 }
281 }
282 #endif /* CONFIG_OWE */
283
284 psk = hostapd_get_psk(hapd->conf, addr, p2p_dev_addr, prev_psk);
285 /*
286 * This is about to iterate over all psks, prev_psk gives the last
287 * returned psk which should not be returned again.
288 * logic list (all hostapd_get_psk; all sta->psk)
289 */
290 if (sta && sta->psk && !psk) {
291 struct hostapd_sta_wpa_psk_short *pos;
292 psk = sta->psk->psk;
293 for (pos = sta->psk; pos; pos = pos->next) {
294 if (pos->is_passphrase) {
295 pbkdf2_sha1(pos->passphrase,
296 hapd->conf->ssid.ssid,
297 hapd->conf->ssid.ssid_len, 4096,
298 pos->psk, PMK_LEN);
299 pos->is_passphrase = 0;
300 }
301 if (pos->psk == prev_psk) {
302 psk = pos->next ? pos->next->psk : NULL;
303 break;
304 }
305 }
306 }
307 return psk;
308 }
309
310
hostapd_wpa_auth_get_msk(void * ctx,const u8 * addr,u8 * msk,size_t * len)311 static int hostapd_wpa_auth_get_msk(void *ctx, const u8 *addr, u8 *msk,
312 size_t *len)
313 {
314 struct hostapd_data *hapd = ctx;
315 const u8 *key;
316 size_t keylen;
317 struct sta_info *sta;
318
319 sta = ap_get_sta(hapd, addr);
320 if (sta == NULL) {
321 wpa_printf(MSG_DEBUG, "AUTH_GET_MSK: Cannot find STA");
322 return -1;
323 }
324
325 key = ieee802_1x_get_key(sta->eapol_sm, &keylen);
326 if (key == NULL) {
327 wpa_printf(MSG_DEBUG, "AUTH_GET_MSK: Key is null, eapol_sm: %p",
328 sta->eapol_sm);
329 return -1;
330 }
331
332 if (keylen > *len)
333 keylen = *len;
334 os_memcpy(msk, key, keylen);
335 *len = keylen;
336
337 return 0;
338 }
339
340
hostapd_wpa_auth_set_key(void * ctx,int vlan_id,enum wpa_alg alg,const u8 * addr,int idx,u8 * key,size_t key_len)341 static int hostapd_wpa_auth_set_key(void *ctx, int vlan_id, enum wpa_alg alg,
342 const u8 *addr, int idx, u8 *key,
343 size_t key_len)
344 {
345 struct hostapd_data *hapd = ctx;
346 const char *ifname = hapd->conf->iface;
347
348 if (vlan_id > 0) {
349 ifname = hostapd_get_vlan_id_ifname(hapd->conf->vlan, vlan_id);
350 if (ifname == NULL)
351 return -1;
352 }
353
354 #ifdef CONFIG_TESTING_OPTIONS
355 if (addr && !is_broadcast_ether_addr(addr)) {
356 struct sta_info *sta;
357
358 sta = ap_get_sta(hapd, addr);
359 if (sta) {
360 sta->last_tk_alg = alg;
361 sta->last_tk_key_idx = idx;
362 if (key)
363 os_memcpy(sta->last_tk, key, key_len);
364 sta->last_tk_len = key_len;
365 }
366 #ifdef CONFIG_IEEE80211W
367 } else if (alg == WPA_CIPHER_AES_128_CMAC ||
368 alg == WPA_CIPHER_BIP_GMAC_128 ||
369 alg == WPA_CIPHER_BIP_GMAC_256 ||
370 alg == WPA_CIPHER_BIP_CMAC_256) {
371 hapd->last_igtk_alg = alg;
372 hapd->last_igtk_key_idx = idx;
373 if (key)
374 os_memcpy(hapd->last_igtk, key, key_len);
375 hapd->last_igtk_len = key_len;
376 #endif /* CONFIG_IEEE80211W */
377 } else {
378 hapd->last_gtk_alg = alg;
379 hapd->last_gtk_key_idx = idx;
380 if (key)
381 os_memcpy(hapd->last_gtk, key, key_len);
382 hapd->last_gtk_len = key_len;
383 }
384 #endif /* CONFIG_TESTING_OPTIONS */
385 return hostapd_drv_set_key(ifname, hapd, alg, addr, idx, 1, NULL, 0,
386 key, key_len);
387 }
388
389
hostapd_wpa_auth_get_seqnum(void * ctx,const u8 * addr,int idx,u8 * seq)390 static int hostapd_wpa_auth_get_seqnum(void *ctx, const u8 *addr, int idx,
391 u8 *seq)
392 {
393 struct hostapd_data *hapd = ctx;
394 return hostapd_get_seqnum(hapd->conf->iface, hapd, addr, idx, seq);
395 }
396
397
hostapd_wpa_auth_send_eapol(void * ctx,const u8 * addr,const u8 * data,size_t data_len,int encrypt)398 static int hostapd_wpa_auth_send_eapol(void *ctx, const u8 *addr,
399 const u8 *data, size_t data_len,
400 int encrypt)
401 {
402 struct hostapd_data *hapd = ctx;
403 struct sta_info *sta;
404 u32 flags = 0;
405
406 #ifdef CONFIG_TESTING_OPTIONS
407 if (hapd->ext_eapol_frame_io) {
408 size_t hex_len = 2 * data_len + 1;
409 char *hex = os_malloc(hex_len);
410
411 if (hex == NULL)
412 return -1;
413 wpa_snprintf_hex(hex, hex_len, data, data_len);
414 wpa_msg(hapd->msg_ctx, MSG_INFO, "EAPOL-TX " MACSTR " %s",
415 MAC2STR(addr), hex);
416 os_free(hex);
417 return 0;
418 }
419 #endif /* CONFIG_TESTING_OPTIONS */
420
421 sta = ap_get_sta(hapd, addr);
422 if (sta)
423 flags = hostapd_sta_flags_to_drv(sta->flags);
424
425 return hostapd_drv_hapd_send_eapol(hapd, addr, data, data_len,
426 encrypt, flags);
427 }
428
429
hostapd_wpa_auth_for_each_sta(void * ctx,int (* cb)(struct wpa_state_machine * sm,void * ctx),void * cb_ctx)430 static int hostapd_wpa_auth_for_each_sta(
431 void *ctx, int (*cb)(struct wpa_state_machine *sm, void *ctx),
432 void *cb_ctx)
433 {
434 struct hostapd_data *hapd = ctx;
435 struct sta_info *sta;
436
437 for (sta = hapd->sta_list; sta; sta = sta->next) {
438 if (sta->wpa_sm && cb(sta->wpa_sm, cb_ctx))
439 return 1;
440 }
441 return 0;
442 }
443
444
445 struct wpa_auth_iface_iter_data {
446 int (*cb)(struct wpa_authenticator *sm, void *ctx);
447 void *cb_ctx;
448 };
449
wpa_auth_iface_iter(struct hostapd_iface * iface,void * ctx)450 static int wpa_auth_iface_iter(struct hostapd_iface *iface, void *ctx)
451 {
452 struct wpa_auth_iface_iter_data *data = ctx;
453 size_t i;
454 for (i = 0; i < iface->num_bss; i++) {
455 if (iface->bss[i]->wpa_auth &&
456 data->cb(iface->bss[i]->wpa_auth, data->cb_ctx))
457 return 1;
458 }
459 return 0;
460 }
461
462
hostapd_wpa_auth_for_each_auth(void * ctx,int (* cb)(struct wpa_authenticator * sm,void * ctx),void * cb_ctx)463 static int hostapd_wpa_auth_for_each_auth(
464 void *ctx, int (*cb)(struct wpa_authenticator *sm, void *ctx),
465 void *cb_ctx)
466 {
467 struct hostapd_data *hapd = ctx;
468 struct wpa_auth_iface_iter_data data;
469 if (hapd->iface->interfaces == NULL ||
470 hapd->iface->interfaces->for_each_interface == NULL)
471 return -1;
472 data.cb = cb;
473 data.cb_ctx = cb_ctx;
474 return hapd->iface->interfaces->for_each_interface(
475 hapd->iface->interfaces, wpa_auth_iface_iter, &data);
476 }
477
478
479 #ifdef CONFIG_IEEE80211R_AP
480
481 struct wpa_ft_rrb_rx_later_data {
482 struct dl_list list;
483 u8 addr[ETH_ALEN];
484 size_t data_len;
485 /* followed by data_len octets of data */
486 };
487
hostapd_wpa_ft_rrb_rx_later(void * eloop_ctx,void * timeout_ctx)488 static void hostapd_wpa_ft_rrb_rx_later(void *eloop_ctx, void *timeout_ctx)
489 {
490 struct hostapd_data *hapd = eloop_ctx;
491 struct wpa_ft_rrb_rx_later_data *data, *n;
492
493 dl_list_for_each_safe(data, n, &hapd->l2_queue,
494 struct wpa_ft_rrb_rx_later_data, list) {
495 if (hapd->wpa_auth) {
496 wpa_ft_rrb_rx(hapd->wpa_auth, data->addr,
497 (const u8 *) (data + 1),
498 data->data_len);
499 }
500 dl_list_del(&data->list);
501 os_free(data);
502 }
503 }
504
505
506 struct wpa_auth_ft_iface_iter_data {
507 struct hostapd_data *src_hapd;
508 const u8 *dst;
509 const u8 *data;
510 size_t data_len;
511 };
512
513
hostapd_wpa_auth_ft_iter(struct hostapd_iface * iface,void * ctx)514 static int hostapd_wpa_auth_ft_iter(struct hostapd_iface *iface, void *ctx)
515 {
516 struct wpa_auth_ft_iface_iter_data *idata = ctx;
517 struct wpa_ft_rrb_rx_later_data *data;
518 struct hostapd_data *hapd;
519 size_t j;
520
521 for (j = 0; j < iface->num_bss; j++) {
522 hapd = iface->bss[j];
523 if (hapd == idata->src_hapd ||
524 !hapd->wpa_auth ||
525 os_memcmp(hapd->own_addr, idata->dst, ETH_ALEN) != 0)
526 continue;
527
528 wpa_printf(MSG_DEBUG,
529 "FT: Send RRB data directly to locally managed BSS "
530 MACSTR "@%s -> " MACSTR "@%s",
531 MAC2STR(idata->src_hapd->own_addr),
532 idata->src_hapd->conf->iface,
533 MAC2STR(hapd->own_addr), hapd->conf->iface);
534
535 /* Defer wpa_ft_rrb_rx() until next eloop step as this is
536 * when it would be triggered when reading from a socket.
537 * This avoids
538 * hapd0:send -> hapd1:recv -> hapd1:send -> hapd0:recv,
539 * that is calling hapd0:recv handler from within
540 * hapd0:send directly.
541 */
542 data = os_zalloc(sizeof(*data) + idata->data_len);
543 if (!data)
544 return 1;
545
546 os_memcpy(data->addr, idata->src_hapd->own_addr, ETH_ALEN);
547 os_memcpy(data + 1, idata->data, idata->data_len);
548 data->data_len = idata->data_len;
549
550 dl_list_add(&hapd->l2_queue, &data->list);
551
552 if (!eloop_is_timeout_registered(hostapd_wpa_ft_rrb_rx_later,
553 hapd, NULL))
554 eloop_register_timeout(0, 0,
555 hostapd_wpa_ft_rrb_rx_later,
556 hapd, NULL);
557
558 return 1;
559 }
560
561 return 0;
562 }
563
564 #endif /* CONFIG_IEEE80211R_AP */
565
566
hostapd_wpa_auth_send_ether(void * ctx,const u8 * dst,u16 proto,const u8 * data,size_t data_len)567 static int hostapd_wpa_auth_send_ether(void *ctx, const u8 *dst, u16 proto,
568 const u8 *data, size_t data_len)
569 {
570 struct hostapd_data *hapd = ctx;
571 struct l2_ethhdr *buf;
572 int ret;
573
574 #ifdef CONFIG_TESTING_OPTIONS
575 if (hapd->ext_eapol_frame_io && proto == ETH_P_EAPOL) {
576 size_t hex_len = 2 * data_len + 1;
577 char *hex = os_malloc(hex_len);
578
579 if (hex == NULL)
580 return -1;
581 wpa_snprintf_hex(hex, hex_len, data, data_len);
582 wpa_msg(hapd->msg_ctx, MSG_INFO, "EAPOL-TX " MACSTR " %s",
583 MAC2STR(dst), hex);
584 os_free(hex);
585 return 0;
586 }
587 #endif /* CONFIG_TESTING_OPTIONS */
588
589 #ifdef CONFIG_IEEE80211R_AP
590 if (proto == ETH_P_RRB && hapd->iface->interfaces &&
591 hapd->iface->interfaces->for_each_interface) {
592 int res;
593 struct wpa_auth_ft_iface_iter_data idata;
594 idata.src_hapd = hapd;
595 idata.dst = dst;
596 idata.data = data;
597 idata.data_len = data_len;
598 res = hapd->iface->interfaces->for_each_interface(
599 hapd->iface->interfaces, hostapd_wpa_auth_ft_iter,
600 &idata);
601 if (res == 1)
602 return data_len;
603 }
604 #endif /* CONFIG_IEEE80211R_AP */
605
606 if (hapd->driver && hapd->driver->send_ether)
607 return hapd->driver->send_ether(hapd->drv_priv, dst,
608 hapd->own_addr, proto,
609 data, data_len);
610 if (hapd->l2 == NULL)
611 return -1;
612
613 buf = os_malloc(sizeof(*buf) + data_len);
614 if (buf == NULL)
615 return -1;
616 os_memcpy(buf->h_dest, dst, ETH_ALEN);
617 os_memcpy(buf->h_source, hapd->own_addr, ETH_ALEN);
618 buf->h_proto = host_to_be16(proto);
619 os_memcpy(buf + 1, data, data_len);
620 ret = l2_packet_send(hapd->l2, dst, proto, (u8 *) buf,
621 sizeof(*buf) + data_len);
622 os_free(buf);
623 return ret;
624 }
625
626
627 #ifdef CONFIG_ETH_P_OUI
hostapd_wpa_get_oui(struct hostapd_data * hapd,u8 oui_suffix)628 static struct eth_p_oui_ctx * hostapd_wpa_get_oui(struct hostapd_data *hapd,
629 u8 oui_suffix)
630 {
631 switch (oui_suffix) {
632 #ifdef CONFIG_IEEE80211R_AP
633 case FT_PACKET_R0KH_R1KH_PULL:
634 return hapd->oui_pull;
635 case FT_PACKET_R0KH_R1KH_RESP:
636 return hapd->oui_resp;
637 case FT_PACKET_R0KH_R1KH_PUSH:
638 return hapd->oui_push;
639 case FT_PACKET_R0KH_R1KH_SEQ_REQ:
640 return hapd->oui_sreq;
641 case FT_PACKET_R0KH_R1KH_SEQ_RESP:
642 return hapd->oui_sresp;
643 #endif /* CONFIG_IEEE80211R_AP */
644 default:
645 return NULL;
646 }
647 }
648 #endif /* CONFIG_ETH_P_OUI */
649
650
651 #ifdef CONFIG_IEEE80211R_AP
652
653 struct oui_deliver_later_data {
654 struct dl_list list;
655 u8 src_addr[ETH_ALEN];
656 u8 dst_addr[ETH_ALEN];
657 size_t data_len;
658 u8 oui_suffix;
659 /* followed by data_len octets of data */
660 };
661
hostapd_oui_deliver_later(void * eloop_ctx,void * timeout_ctx)662 static void hostapd_oui_deliver_later(void *eloop_ctx, void *timeout_ctx)
663 {
664 struct hostapd_data *hapd = eloop_ctx;
665 struct oui_deliver_later_data *data, *n;
666 struct eth_p_oui_ctx *oui_ctx;
667
668 dl_list_for_each_safe(data, n, &hapd->l2_oui_queue,
669 struct oui_deliver_later_data, list) {
670 oui_ctx = hostapd_wpa_get_oui(hapd, data->oui_suffix);
671 if (hapd->wpa_auth && oui_ctx) {
672 eth_p_oui_deliver(oui_ctx, data->src_addr,
673 data->dst_addr,
674 (const u8 *) (data + 1),
675 data->data_len);
676 }
677 dl_list_del(&data->list);
678 os_free(data);
679 }
680 }
681
682
683 struct wpa_auth_oui_iface_iter_data {
684 struct hostapd_data *src_hapd;
685 const u8 *dst_addr;
686 const u8 *data;
687 size_t data_len;
688 u8 oui_suffix;
689 };
690
hostapd_wpa_auth_oui_iter(struct hostapd_iface * iface,void * ctx)691 static int hostapd_wpa_auth_oui_iter(struct hostapd_iface *iface, void *ctx)
692 {
693 struct wpa_auth_oui_iface_iter_data *idata = ctx;
694 struct oui_deliver_later_data *data;
695 struct hostapd_data *hapd;
696 size_t j;
697
698 for (j = 0; j < iface->num_bss; j++) {
699 hapd = iface->bss[j];
700 if (hapd == idata->src_hapd)
701 continue;
702 if (!is_multicast_ether_addr(idata->dst_addr) &&
703 os_memcmp(hapd->own_addr, idata->dst_addr, ETH_ALEN) != 0)
704 continue;
705
706 /* defer eth_p_oui_deliver until next eloop step as this is
707 * when it would be triggerd from reading from sock
708 * This avoids
709 * hapd0:send -> hapd1:recv -> hapd1:send -> hapd0:recv,
710 * that is calling hapd0:recv handler from within
711 * hapd0:send directly.
712 */
713 data = os_zalloc(sizeof(*data) + idata->data_len);
714 if (!data)
715 return 1;
716
717 os_memcpy(data->src_addr, idata->src_hapd->own_addr, ETH_ALEN);
718 os_memcpy(data->dst_addr, idata->dst_addr, ETH_ALEN);
719 os_memcpy(data + 1, idata->data, idata->data_len);
720 data->data_len = idata->data_len;
721 data->oui_suffix = idata->oui_suffix;
722
723 dl_list_add(&hapd->l2_oui_queue, &data->list);
724
725 if (!eloop_is_timeout_registered(hostapd_oui_deliver_later,
726 hapd, NULL))
727 eloop_register_timeout(0, 0,
728 hostapd_oui_deliver_later,
729 hapd, NULL);
730
731 return 1;
732 }
733
734 return 0;
735 }
736
737 #endif /* CONFIG_IEEE80211R_AP */
738
739
hostapd_wpa_auth_send_oui(void * ctx,const u8 * dst,u8 oui_suffix,const u8 * data,size_t data_len)740 static int hostapd_wpa_auth_send_oui(void *ctx, const u8 *dst, u8 oui_suffix,
741 const u8 *data, size_t data_len)
742 {
743 #ifdef CONFIG_ETH_P_OUI
744 struct hostapd_data *hapd = ctx;
745 struct eth_p_oui_ctx *oui_ctx;
746
747 #ifdef CONFIG_IEEE80211R_AP
748 if (hapd->iface->interfaces &&
749 hapd->iface->interfaces->for_each_interface) {
750 struct wpa_auth_oui_iface_iter_data idata;
751 int res;
752
753 idata.src_hapd = hapd;
754 idata.dst_addr = dst;
755 idata.data = data;
756 idata.data_len = data_len;
757 idata.oui_suffix = oui_suffix;
758 res = hapd->iface->interfaces->for_each_interface(
759 hapd->iface->interfaces, hostapd_wpa_auth_oui_iter,
760 &idata);
761 if (res == 1)
762 return data_len;
763 }
764 #endif /* CONFIG_IEEE80211R_AP */
765
766 oui_ctx = hostapd_wpa_get_oui(hapd, oui_suffix);
767 if (!oui_ctx)
768 return -1;
769
770 return eth_p_oui_send(oui_ctx, hapd->own_addr, dst, data, data_len);
771 #else /* CONFIG_ETH_P_OUI */
772 return -1;
773 #endif /* CONFIG_ETH_P_OUI */
774 }
775
776
777 #ifdef CONFIG_IEEE80211R_AP
778
hostapd_wpa_auth_send_ft_action(void * ctx,const u8 * dst,const u8 * data,size_t data_len)779 static int hostapd_wpa_auth_send_ft_action(void *ctx, const u8 *dst,
780 const u8 *data, size_t data_len)
781 {
782 struct hostapd_data *hapd = ctx;
783 int res;
784 struct ieee80211_mgmt *m;
785 size_t mlen;
786 struct sta_info *sta;
787
788 sta = ap_get_sta(hapd, dst);
789 if (sta == NULL || sta->wpa_sm == NULL)
790 return -1;
791
792 m = os_zalloc(sizeof(*m) + data_len);
793 if (m == NULL)
794 return -1;
795 mlen = ((u8 *) &m->u - (u8 *) m) + data_len;
796 m->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
797 WLAN_FC_STYPE_ACTION);
798 os_memcpy(m->da, dst, ETH_ALEN);
799 os_memcpy(m->sa, hapd->own_addr, ETH_ALEN);
800 os_memcpy(m->bssid, hapd->own_addr, ETH_ALEN);
801 os_memcpy(&m->u, data, data_len);
802
803 res = hostapd_drv_send_mlme(hapd, (u8 *) m, mlen, 0);
804 os_free(m);
805 return res;
806 }
807
808
809 static struct wpa_state_machine *
hostapd_wpa_auth_add_sta(void * ctx,const u8 * sta_addr)810 hostapd_wpa_auth_add_sta(void *ctx, const u8 *sta_addr)
811 {
812 struct hostapd_data *hapd = ctx;
813 struct sta_info *sta;
814
815 if (hostapd_add_sta_node(hapd, sta_addr, WLAN_AUTH_FT) < 0)
816 return NULL;
817
818 sta = ap_sta_add(hapd, sta_addr);
819 if (sta == NULL)
820 return NULL;
821 if (sta->wpa_sm) {
822 sta->auth_alg = WLAN_AUTH_FT;
823 return sta->wpa_sm;
824 }
825
826 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth, sta->addr, NULL);
827 if (sta->wpa_sm == NULL) {
828 ap_free_sta(hapd, sta);
829 return NULL;
830 }
831 sta->auth_alg = WLAN_AUTH_FT;
832
833 return sta->wpa_sm;
834 }
835
836
hostapd_rrb_receive(void * ctx,const u8 * src_addr,const u8 * buf,size_t len)837 static void hostapd_rrb_receive(void *ctx, const u8 *src_addr, const u8 *buf,
838 size_t len)
839 {
840 struct hostapd_data *hapd = ctx;
841 struct l2_ethhdr *ethhdr;
842 if (len < sizeof(*ethhdr))
843 return;
844 ethhdr = (struct l2_ethhdr *) buf;
845 wpa_printf(MSG_DEBUG, "FT: RRB received packet " MACSTR " -> "
846 MACSTR, MAC2STR(ethhdr->h_source), MAC2STR(ethhdr->h_dest));
847 if (!is_multicast_ether_addr(ethhdr->h_dest) &&
848 os_memcmp(hapd->own_addr, ethhdr->h_dest, ETH_ALEN) != 0)
849 return;
850 wpa_ft_rrb_rx(hapd->wpa_auth, ethhdr->h_source, buf + sizeof(*ethhdr),
851 len - sizeof(*ethhdr));
852 }
853
854
hostapd_rrb_oui_receive(void * ctx,const u8 * src_addr,const u8 * dst_addr,u8 oui_suffix,const u8 * buf,size_t len)855 static void hostapd_rrb_oui_receive(void *ctx, const u8 *src_addr,
856 const u8 *dst_addr, u8 oui_suffix,
857 const u8 *buf, size_t len)
858 {
859 struct hostapd_data *hapd = ctx;
860
861 wpa_printf(MSG_DEBUG, "FT: RRB received packet " MACSTR " -> "
862 MACSTR, MAC2STR(src_addr), MAC2STR(dst_addr));
863 if (!is_multicast_ether_addr(dst_addr) &&
864 os_memcmp(hapd->own_addr, dst_addr, ETH_ALEN) != 0)
865 return;
866 wpa_ft_rrb_oui_rx(hapd->wpa_auth, src_addr, dst_addr, oui_suffix, buf,
867 len);
868 }
869
870
hostapd_wpa_auth_add_tspec(void * ctx,const u8 * sta_addr,u8 * tspec_ie,size_t tspec_ielen)871 static int hostapd_wpa_auth_add_tspec(void *ctx, const u8 *sta_addr,
872 u8 *tspec_ie, size_t tspec_ielen)
873 {
874 struct hostapd_data *hapd = ctx;
875 return hostapd_add_tspec(hapd, sta_addr, tspec_ie, tspec_ielen);
876 }
877
878
879
hostapd_wpa_register_ft_oui(struct hostapd_data * hapd,const char * ft_iface)880 static int hostapd_wpa_register_ft_oui(struct hostapd_data *hapd,
881 const char *ft_iface)
882 {
883 hapd->oui_pull = eth_p_oui_register(hapd, ft_iface,
884 FT_PACKET_R0KH_R1KH_PULL,
885 hostapd_rrb_oui_receive, hapd);
886 if (!hapd->oui_pull)
887 return -1;
888
889 hapd->oui_resp = eth_p_oui_register(hapd, ft_iface,
890 FT_PACKET_R0KH_R1KH_RESP,
891 hostapd_rrb_oui_receive, hapd);
892 if (!hapd->oui_resp)
893 return -1;
894
895 hapd->oui_push = eth_p_oui_register(hapd, ft_iface,
896 FT_PACKET_R0KH_R1KH_PUSH,
897 hostapd_rrb_oui_receive, hapd);
898 if (!hapd->oui_push)
899 return -1;
900
901 hapd->oui_sreq = eth_p_oui_register(hapd, ft_iface,
902 FT_PACKET_R0KH_R1KH_SEQ_REQ,
903 hostapd_rrb_oui_receive, hapd);
904 if (!hapd->oui_sreq)
905 return -1;
906
907 hapd->oui_sresp = eth_p_oui_register(hapd, ft_iface,
908 FT_PACKET_R0KH_R1KH_SEQ_RESP,
909 hostapd_rrb_oui_receive, hapd);
910 if (!hapd->oui_sresp)
911 return -1;
912
913 return 0;
914 }
915
916
hostapd_wpa_unregister_ft_oui(struct hostapd_data * hapd)917 static void hostapd_wpa_unregister_ft_oui(struct hostapd_data *hapd)
918 {
919 eth_p_oui_unregister(hapd->oui_pull);
920 hapd->oui_pull = NULL;
921 eth_p_oui_unregister(hapd->oui_resp);
922 hapd->oui_resp = NULL;
923 eth_p_oui_unregister(hapd->oui_push);
924 hapd->oui_push = NULL;
925 eth_p_oui_unregister(hapd->oui_sreq);
926 hapd->oui_sreq = NULL;
927 eth_p_oui_unregister(hapd->oui_sresp);
928 hapd->oui_sresp = NULL;
929 }
930 #endif /* CONFIG_IEEE80211R_AP */
931
932
hostapd_setup_wpa(struct hostapd_data * hapd)933 int hostapd_setup_wpa(struct hostapd_data *hapd)
934 {
935 struct wpa_auth_config _conf;
936 static const struct wpa_auth_callbacks cb = {
937 .logger = hostapd_wpa_auth_logger,
938 .disconnect = hostapd_wpa_auth_disconnect,
939 .mic_failure_report = hostapd_wpa_auth_mic_failure_report,
940 .psk_failure_report = hostapd_wpa_auth_psk_failure_report,
941 .set_eapol = hostapd_wpa_auth_set_eapol,
942 .get_eapol = hostapd_wpa_auth_get_eapol,
943 .get_psk = hostapd_wpa_auth_get_psk,
944 .get_msk = hostapd_wpa_auth_get_msk,
945 .set_key = hostapd_wpa_auth_set_key,
946 .get_seqnum = hostapd_wpa_auth_get_seqnum,
947 .send_eapol = hostapd_wpa_auth_send_eapol,
948 .for_each_sta = hostapd_wpa_auth_for_each_sta,
949 .for_each_auth = hostapd_wpa_auth_for_each_auth,
950 .send_ether = hostapd_wpa_auth_send_ether,
951 .send_oui = hostapd_wpa_auth_send_oui,
952 #ifdef CONFIG_IEEE80211R_AP
953 .send_ft_action = hostapd_wpa_auth_send_ft_action,
954 .add_sta = hostapd_wpa_auth_add_sta,
955 .add_tspec = hostapd_wpa_auth_add_tspec,
956 #endif /* CONFIG_IEEE80211R_AP */
957 };
958 const u8 *wpa_ie;
959 size_t wpa_ie_len;
960
961 hostapd_wpa_auth_conf(hapd->conf, hapd->iconf, &_conf);
962 if (hapd->iface->drv_flags & WPA_DRIVER_FLAGS_EAPOL_TX_STATUS)
963 _conf.tx_status = 1;
964 if (hapd->iface->drv_flags & WPA_DRIVER_FLAGS_AP_MLME)
965 _conf.ap_mlme = 1;
966 hapd->wpa_auth = wpa_init(hapd->own_addr, &_conf, &cb, hapd);
967 if (hapd->wpa_auth == NULL) {
968 wpa_printf(MSG_ERROR, "WPA initialization failed.");
969 return -1;
970 }
971
972 if (hostapd_set_privacy(hapd, 1)) {
973 wpa_printf(MSG_ERROR, "Could not set PrivacyInvoked "
974 "for interface %s", hapd->conf->iface);
975 return -1;
976 }
977
978 wpa_ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &wpa_ie_len);
979 if (hostapd_set_generic_elem(hapd, wpa_ie, wpa_ie_len)) {
980 wpa_printf(MSG_ERROR, "Failed to configure WPA IE for "
981 "the kernel driver.");
982 return -1;
983 }
984
985 if (rsn_preauth_iface_init(hapd)) {
986 wpa_printf(MSG_ERROR, "Initialization of RSN "
987 "pre-authentication failed.");
988 return -1;
989 }
990
991 #ifdef CONFIG_IEEE80211R_AP
992 if (!hostapd_drv_none(hapd) &&
993 wpa_key_mgmt_ft(hapd->conf->wpa_key_mgmt)) {
994 const char *ft_iface;
995
996 ft_iface = hapd->conf->bridge[0] ? hapd->conf->bridge :
997 hapd->conf->iface;
998 hapd->l2 = l2_packet_init(ft_iface, NULL, ETH_P_RRB,
999 hostapd_rrb_receive, hapd, 1);
1000 if (hapd->l2 == NULL &&
1001 (hapd->driver == NULL ||
1002 hapd->driver->send_ether == NULL)) {
1003 wpa_printf(MSG_ERROR, "Failed to open l2_packet "
1004 "interface");
1005 return -1;
1006 }
1007
1008 if (hostapd_wpa_register_ft_oui(hapd, ft_iface)) {
1009 wpa_printf(MSG_ERROR,
1010 "Failed to open ETH_P_OUI interface");
1011 return -1;
1012 }
1013 }
1014 #endif /* CONFIG_IEEE80211R_AP */
1015
1016 return 0;
1017
1018 }
1019
1020
hostapd_reconfig_wpa(struct hostapd_data * hapd)1021 void hostapd_reconfig_wpa(struct hostapd_data *hapd)
1022 {
1023 struct wpa_auth_config wpa_auth_conf;
1024 hostapd_wpa_auth_conf(hapd->conf, hapd->iconf, &wpa_auth_conf);
1025 wpa_reconfig(hapd->wpa_auth, &wpa_auth_conf);
1026 }
1027
1028
hostapd_deinit_wpa(struct hostapd_data * hapd)1029 void hostapd_deinit_wpa(struct hostapd_data *hapd)
1030 {
1031 ieee80211_tkip_countermeasures_deinit(hapd);
1032 rsn_preauth_iface_deinit(hapd);
1033 if (hapd->wpa_auth) {
1034 wpa_deinit(hapd->wpa_auth);
1035 hapd->wpa_auth = NULL;
1036
1037 if (hapd->drv_priv && hostapd_set_privacy(hapd, 0)) {
1038 wpa_printf(MSG_DEBUG, "Could not disable "
1039 "PrivacyInvoked for interface %s",
1040 hapd->conf->iface);
1041 }
1042
1043 if (hapd->drv_priv &&
1044 hostapd_set_generic_elem(hapd, (u8 *) "", 0)) {
1045 wpa_printf(MSG_DEBUG, "Could not remove generic "
1046 "information element from interface %s",
1047 hapd->conf->iface);
1048 }
1049 }
1050 ieee802_1x_deinit(hapd);
1051
1052 #ifdef CONFIG_IEEE80211R_AP
1053 eloop_cancel_timeout(hostapd_wpa_ft_rrb_rx_later, hapd, ELOOP_ALL_CTX);
1054 hostapd_wpa_ft_rrb_rx_later(hapd, NULL); /* flush without delivering */
1055 eloop_cancel_timeout(hostapd_oui_deliver_later, hapd, ELOOP_ALL_CTX);
1056 hostapd_oui_deliver_later(hapd, NULL); /* flush without delivering */
1057 l2_packet_deinit(hapd->l2);
1058 hapd->l2 = NULL;
1059 hostapd_wpa_unregister_ft_oui(hapd);
1060 #endif /* CONFIG_IEEE80211R_AP */
1061 }
1062