1 /*
2 * hostapd / IEEE 802.1X-2004 Authenticator
3 * Copyright (c) 2002-2019, 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 #ifdef CONFIG_SQLITE
11 #include <sqlite3.h>
12 #endif /* CONFIG_SQLITE */
13
14 #include "utils/common.h"
15 #include "utils/eloop.h"
16 #include "crypto/md5.h"
17 #include "crypto/crypto.h"
18 #include "crypto/random.h"
19 #include "common/ieee802_11_defs.h"
20 #include "radius/radius.h"
21 #include "radius/radius_client.h"
22 #include "eap_server/eap.h"
23 #include "eap_common/eap_wsc_common.h"
24 #include "eapol_auth/eapol_auth_sm.h"
25 #include "eapol_auth/eapol_auth_sm_i.h"
26 #include "p2p/p2p.h"
27 #include "hostapd.h"
28 #include "accounting.h"
29 #include "sta_info.h"
30 #include "wpa_auth.h"
31 #include "preauth_auth.h"
32 #include "pmksa_cache_auth.h"
33 #include "ap_config.h"
34 #include "ap_drv_ops.h"
35 #include "wps_hostapd.h"
36 #include "hs20.h"
37 /* FIX: Not really a good thing to require ieee802_11.h here.. (FILS) */
38 #include "ieee802_11.h"
39 #include "ieee802_1x.h"
40 #include "wpa_auth_kay.h"
41
42
43 #ifdef CONFIG_HS20
44 static void ieee802_1x_wnm_notif_send(void *eloop_ctx, void *timeout_ctx);
45 #endif /* CONFIG_HS20 */
46 static bool ieee802_1x_finished(struct hostapd_data *hapd,
47 struct sta_info *sta, int success,
48 int remediation, bool logoff);
49
50
ieee802_1x_send(struct hostapd_data * hapd,struct sta_info * sta,u8 type,const u8 * data,size_t datalen)51 static void ieee802_1x_send(struct hostapd_data *hapd, struct sta_info *sta,
52 u8 type, const u8 *data, size_t datalen)
53 {
54 u8 *buf;
55 struct ieee802_1x_hdr *xhdr;
56 size_t len;
57 int encrypt = 0;
58
59 len = sizeof(*xhdr) + datalen;
60 buf = os_zalloc(len);
61 if (!buf) {
62 wpa_printf(MSG_ERROR, "malloc() failed for %s(len=%lu)",
63 __func__, (unsigned long) len);
64 return;
65 }
66
67 xhdr = (struct ieee802_1x_hdr *) buf;
68 xhdr->version = hapd->conf->eapol_version;
69 #ifdef CONFIG_MACSEC
70 if (xhdr->version > 2 && hapd->conf->macsec_policy == 0)
71 xhdr->version = 2;
72 #endif /* CONFIG_MACSEC */
73 xhdr->type = type;
74 xhdr->length = host_to_be16(datalen);
75
76 if (datalen > 0 && data != NULL)
77 os_memcpy(xhdr + 1, data, datalen);
78
79 if (wpa_auth_pairwise_set(sta->wpa_sm))
80 encrypt = 1;
81 #ifdef CONFIG_TESTING_OPTIONS
82 if (hapd->ext_eapol_frame_io) {
83 size_t hex_len = 2 * len + 1;
84 char *hex = os_malloc(hex_len);
85
86 if (hex) {
87 wpa_snprintf_hex(hex, hex_len, buf, len);
88 wpa_msg(hapd->msg_ctx, MSG_INFO,
89 "EAPOL-TX " MACSTR " %s",
90 MAC2STR(sta->addr), hex);
91 os_free(hex);
92 }
93 } else
94 #endif /* CONFIG_TESTING_OPTIONS */
95 if (sta->flags & WLAN_STA_PREAUTH) {
96 rsn_preauth_send(hapd, sta, buf, len);
97 } else {
98 int link_id = -1;
99
100 #ifdef CONFIG_IEEE80211BE
101 link_id = hapd->conf->mld_ap ? hapd->mld_link_id : -1;
102 #endif /* CONFIG_IEEE80211BE */
103 hostapd_drv_hapd_send_eapol(
104 hapd, sta->addr, buf, len,
105 encrypt, hostapd_sta_flags_to_drv(sta->flags), link_id);
106 }
107
108 os_free(buf);
109 }
110
111
ieee802_1x_set_authorized(struct hostapd_data * hapd,struct sta_info * sta,bool authorized,bool mld)112 static void ieee802_1x_set_authorized(struct hostapd_data *hapd,
113 struct sta_info *sta,
114 bool authorized, bool mld)
115 {
116 int res;
117 bool update;
118
119 if (sta->flags & WLAN_STA_PREAUTH)
120 return;
121
122 update = ap_sta_set_authorized_flag(hapd, sta, authorized);
123 res = hostapd_set_authorized(hapd, sta, authorized);
124 if (update)
125 ap_sta_set_authorized_event(hapd, sta, authorized);
126 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
127 HOSTAPD_LEVEL_DEBUG, "%sauthorizing port",
128 authorized ? "" : "un");
129
130 if (!mld && res && errno != ENOENT) {
131 wpa_printf(MSG_DEBUG, "Could not set station " MACSTR
132 " flags for kernel driver (errno=%d).",
133 MAC2STR(sta->addr), errno);
134 } else if (mld && res) {
135 wpa_printf(MSG_DEBUG,
136 "MLD: Could not set station " MACSTR " flags",
137 MAC2STR(sta->addr));
138 }
139
140 if (authorized) {
141 os_get_reltime(&sta->connected_time);
142 accounting_sta_start(hapd, sta);
143 }
144 }
145
146
ieee802_1x_ml_set_sta_authorized(struct hostapd_data * hapd,struct sta_info * sta,bool authorized)147 static void ieee802_1x_ml_set_sta_authorized(struct hostapd_data *hapd,
148 struct sta_info *sta,
149 bool authorized)
150 {
151 #ifdef CONFIG_IEEE80211BE
152 unsigned int i, link_id;
153
154 if (!hostapd_is_mld_ap(hapd))
155 return;
156
157 /*
158 * Authorizing the station should be done only in the station
159 * performing the association
160 */
161 if (authorized && hapd->mld_link_id != sta->mld_assoc_link_id)
162 return;
163
164 for (link_id = 0; link_id < MAX_NUM_MLD_LINKS; link_id++) {
165 struct mld_link_info *link = &sta->mld_info.links[link_id];
166
167 if (!link->valid)
168 continue;
169
170 for (i = 0; i < hapd->iface->interfaces->count; i++) {
171 struct sta_info *tmp_sta;
172 struct hostapd_data *tmp_hapd =
173 hapd->iface->interfaces->iface[i]->bss[0];
174
175 if (!hostapd_is_ml_partner(hapd, tmp_hapd))
176 continue;
177
178 for (tmp_sta = tmp_hapd->sta_list; tmp_sta;
179 tmp_sta = tmp_sta->next) {
180 if (tmp_sta == sta ||
181 tmp_sta->mld_assoc_link_id !=
182 sta->mld_assoc_link_id ||
183 tmp_sta->aid != sta->aid)
184 continue;
185
186 ieee802_1x_set_authorized(tmp_hapd, tmp_sta,
187 authorized, true);
188 break;
189 }
190 }
191 }
192 #endif /* CONFIG_IEEE80211BE */
193 }
194
195
196
ieee802_1x_set_sta_authorized(struct hostapd_data * hapd,struct sta_info * sta,int authorized)197 void ieee802_1x_set_sta_authorized(struct hostapd_data *hapd,
198 struct sta_info *sta, int authorized)
199 {
200 ieee802_1x_set_authorized(hapd, sta, authorized, false);
201 ieee802_1x_ml_set_sta_authorized(hapd, sta, !!authorized);
202 }
203
204
205 #ifdef CONFIG_WEP
206 #ifndef CONFIG_FIPS
207 #ifndef CONFIG_NO_RC4
208
ieee802_1x_tx_key_one(struct hostapd_data * hapd,struct sta_info * sta,int idx,int broadcast,u8 * key_data,size_t key_len)209 static void ieee802_1x_tx_key_one(struct hostapd_data *hapd,
210 struct sta_info *sta,
211 int idx, int broadcast,
212 u8 *key_data, size_t key_len)
213 {
214 u8 *buf, *ekey;
215 struct ieee802_1x_hdr *hdr;
216 struct ieee802_1x_eapol_key *key;
217 size_t len, ekey_len;
218 struct eapol_state_machine *sm = sta->eapol_sm;
219
220 if (!sm)
221 return;
222
223 len = sizeof(*key) + key_len;
224 buf = os_zalloc(sizeof(*hdr) + len);
225 if (!buf)
226 return;
227
228 hdr = (struct ieee802_1x_hdr *) buf;
229 key = (struct ieee802_1x_eapol_key *) (hdr + 1);
230 key->type = EAPOL_KEY_TYPE_RC4;
231 WPA_PUT_BE16(key->key_length, key_len);
232 wpa_get_ntp_timestamp(key->replay_counter);
233 if (os_memcmp(key->replay_counter,
234 hapd->last_1x_eapol_key_replay_counter,
235 IEEE8021X_REPLAY_COUNTER_LEN) <= 0) {
236 /* NTP timestamp did not increment from last EAPOL-Key frame;
237 * use previously used value + 1 instead. */
238 inc_byte_array(hapd->last_1x_eapol_key_replay_counter,
239 IEEE8021X_REPLAY_COUNTER_LEN);
240 os_memcpy(key->replay_counter,
241 hapd->last_1x_eapol_key_replay_counter,
242 IEEE8021X_REPLAY_COUNTER_LEN);
243 } else {
244 os_memcpy(hapd->last_1x_eapol_key_replay_counter,
245 key->replay_counter,
246 IEEE8021X_REPLAY_COUNTER_LEN);
247 }
248
249 if (random_get_bytes(key->key_iv, sizeof(key->key_iv))) {
250 wpa_printf(MSG_ERROR, "Could not get random numbers");
251 os_free(buf);
252 return;
253 }
254
255 key->key_index = idx | (broadcast ? 0 : BIT(7));
256 if (hapd->conf->eapol_key_index_workaround) {
257 /* According to some information, WinXP Supplicant seems to
258 * interpret bit7 as an indication whether the key is to be
259 * activated, so make it possible to enable workaround that
260 * sets this bit for all keys. */
261 key->key_index |= BIT(7);
262 }
263
264 /* Key is encrypted using "Key-IV + MSK[0..31]" as the RC4-key and
265 * MSK[32..63] is used to sign the message. */
266 if (!sm->eap_if->eapKeyData || sm->eap_if->eapKeyDataLen < 64) {
267 wpa_printf(MSG_ERROR,
268 "No eapKeyData available for encrypting and signing EAPOL-Key");
269 os_free(buf);
270 return;
271 }
272 os_memcpy((u8 *) (key + 1), key_data, key_len);
273 ekey_len = sizeof(key->key_iv) + 32;
274 ekey = os_malloc(ekey_len);
275 if (!ekey) {
276 wpa_printf(MSG_ERROR, "Could not encrypt key");
277 os_free(buf);
278 return;
279 }
280 os_memcpy(ekey, key->key_iv, sizeof(key->key_iv));
281 os_memcpy(ekey + sizeof(key->key_iv), sm->eap_if->eapKeyData, 32);
282 rc4_skip(ekey, ekey_len, 0, (u8 *) (key + 1), key_len);
283 os_free(ekey);
284
285 /* This header is needed here for HMAC-MD5, but it will be regenerated
286 * in ieee802_1x_send() */
287 hdr->version = hapd->conf->eapol_version;
288 #ifdef CONFIG_MACSEC
289 if (hdr->version > 2)
290 hdr->version = 2;
291 #endif /* CONFIG_MACSEC */
292 hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
293 hdr->length = host_to_be16(len);
294 hmac_md5(sm->eap_if->eapKeyData + 32, 32, buf, sizeof(*hdr) + len,
295 key->key_signature);
296
297 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key to " MACSTR
298 " (%s index=%d)", MAC2STR(sm->addr),
299 broadcast ? "broadcast" : "unicast", idx);
300 ieee802_1x_send(hapd, sta, IEEE802_1X_TYPE_EAPOL_KEY, (u8 *) key, len);
301 if (sta->eapol_sm)
302 sta->eapol_sm->dot1xAuthEapolFramesTx++;
303 os_free(buf);
304 }
305
306
ieee802_1x_tx_key(struct hostapd_data * hapd,struct sta_info * sta)307 static void ieee802_1x_tx_key(struct hostapd_data *hapd, struct sta_info *sta)
308 {
309 struct eapol_authenticator *eapol = hapd->eapol_auth;
310 struct eapol_state_machine *sm = sta->eapol_sm;
311
312 if (!sm || !sm->eap_if->eapKeyData)
313 return;
314
315 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key(s) to " MACSTR,
316 MAC2STR(sta->addr));
317
318 #ifndef CONFIG_NO_VLAN
319 if (sta->vlan_id > 0) {
320 wpa_printf(MSG_ERROR, "Using WEP with vlans is not supported.");
321 return;
322 }
323 #endif /* CONFIG_NO_VLAN */
324
325 if (eapol->default_wep_key) {
326 ieee802_1x_tx_key_one(hapd, sta, eapol->default_wep_key_idx, 1,
327 eapol->default_wep_key,
328 hapd->conf->default_wep_key_len);
329 }
330
331 if (hapd->conf->individual_wep_key_len > 0) {
332 u8 *ikey;
333
334 ikey = os_malloc(hapd->conf->individual_wep_key_len);
335 if (!ikey ||
336 random_get_bytes(ikey, hapd->conf->individual_wep_key_len))
337 {
338 wpa_printf(MSG_ERROR,
339 "Could not generate random individual WEP key");
340 os_free(ikey);
341 return;
342 }
343
344 wpa_hexdump_key(MSG_DEBUG, "Individual WEP key",
345 ikey, hapd->conf->individual_wep_key_len);
346
347 ieee802_1x_tx_key_one(hapd, sta, 0, 0, ikey,
348 hapd->conf->individual_wep_key_len);
349
350 /* TODO: set encryption in TX callback, i.e., only after STA
351 * has ACKed EAPOL-Key frame */
352 if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
353 sta->addr, 0, 0, 1, NULL, 0, ikey,
354 hapd->conf->individual_wep_key_len,
355 KEY_FLAG_PAIRWISE_RX_TX)) {
356 wpa_printf(MSG_ERROR,
357 "Could not set individual WEP encryption");
358 }
359
360 os_free(ikey);
361 }
362 }
363
364 #endif /* CONFIG_NO_RC4 */
365 #endif /* CONFIG_FIPS */
366 #endif /* CONFIG_WEP */
367
368
radius_mode_txt(struct hostapd_data * hapd)369 const char *radius_mode_txt(struct hostapd_data *hapd)
370 {
371 switch (hapd->iface->conf->hw_mode) {
372 case HOSTAPD_MODE_IEEE80211AD:
373 return "802.11ad";
374 case HOSTAPD_MODE_IEEE80211A:
375 return "802.11a";
376 case HOSTAPD_MODE_IEEE80211G:
377 return "802.11g";
378 case HOSTAPD_MODE_IEEE80211B:
379 default:
380 return "802.11b";
381 }
382 }
383
384
radius_sta_rate(struct hostapd_data * hapd,struct sta_info * sta)385 int radius_sta_rate(struct hostapd_data *hapd, struct sta_info *sta)
386 {
387 int i;
388 u8 rate = 0;
389
390 for (i = 0; i < sta->supported_rates_len; i++)
391 if ((sta->supported_rates[i] & 0x7f) > rate)
392 rate = sta->supported_rates[i] & 0x7f;
393
394 return rate;
395 }
396
397
398 #ifndef CONFIG_NO_RADIUS
ieee802_1x_learn_identity(struct hostapd_data * hapd,struct eapol_state_machine * sm,const u8 * eap,size_t len)399 static void ieee802_1x_learn_identity(struct hostapd_data *hapd,
400 struct eapol_state_machine *sm,
401 const u8 *eap, size_t len)
402 {
403 const u8 *identity;
404 size_t identity_len;
405 const struct eap_hdr *hdr = (const struct eap_hdr *) eap;
406
407 if (len <= sizeof(struct eap_hdr) ||
408 (hdr->code == EAP_CODE_RESPONSE &&
409 eap[sizeof(struct eap_hdr)] != EAP_TYPE_IDENTITY) ||
410 (hdr->code == EAP_CODE_INITIATE &&
411 eap[sizeof(struct eap_hdr)] != EAP_ERP_TYPE_REAUTH) ||
412 (hdr->code != EAP_CODE_RESPONSE &&
413 hdr->code != EAP_CODE_INITIATE))
414 return;
415
416 eap_erp_update_identity(sm->eap, eap, len);
417 identity = eap_get_identity(sm->eap, &identity_len);
418 if (!identity)
419 return;
420
421 /* Save station identity for future RADIUS packets */
422 os_free(sm->identity);
423 sm->identity = (u8 *) dup_binstr(identity, identity_len);
424 if (!sm->identity) {
425 sm->identity_len = 0;
426 return;
427 }
428
429 sm->identity_len = identity_len;
430 hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
431 HOSTAPD_LEVEL_DEBUG, "STA identity '%s'", sm->identity);
432 sm->dot1xAuthEapolRespIdFramesRx++;
433 }
434
435
add_common_radius_sta_attr_rsn(struct hostapd_data * hapd,struct hostapd_radius_attr * req_attr,struct sta_info * sta,struct radius_msg * msg)436 static int add_common_radius_sta_attr_rsn(struct hostapd_data *hapd,
437 struct hostapd_radius_attr *req_attr,
438 struct sta_info *sta,
439 struct radius_msg *msg)
440 {
441 u32 suite;
442 int ver, val;
443
444 ver = wpa_auth_sta_wpa_version(sta->wpa_sm);
445 val = wpa_auth_get_pairwise(sta->wpa_sm);
446 suite = wpa_cipher_to_suite(ver, val);
447 if (val != -1 &&
448 !hostapd_config_get_radius_attr(req_attr,
449 RADIUS_ATTR_WLAN_PAIRWISE_CIPHER) &&
450 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_WLAN_PAIRWISE_CIPHER,
451 suite)) {
452 wpa_printf(MSG_ERROR, "Could not add WLAN-Pairwise-Cipher");
453 return -1;
454 }
455
456 suite = wpa_cipher_to_suite(((hapd->conf->wpa & 0x2) ||
457 hapd->conf->osen) ?
458 WPA_PROTO_RSN : WPA_PROTO_WPA,
459 hapd->conf->wpa_group);
460 if (!hostapd_config_get_radius_attr(req_attr,
461 RADIUS_ATTR_WLAN_GROUP_CIPHER) &&
462 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_WLAN_GROUP_CIPHER,
463 suite)) {
464 wpa_printf(MSG_ERROR, "Could not add WLAN-Group-Cipher");
465 return -1;
466 }
467
468 val = wpa_auth_sta_key_mgmt(sta->wpa_sm);
469 suite = wpa_akm_to_suite(val);
470 if (val != -1 &&
471 !hostapd_config_get_radius_attr(req_attr,
472 RADIUS_ATTR_WLAN_AKM_SUITE) &&
473 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_WLAN_AKM_SUITE,
474 suite)) {
475 wpa_printf(MSG_ERROR, "Could not add WLAN-AKM-Suite");
476 return -1;
477 }
478
479 if (hapd->conf->ieee80211w != NO_MGMT_FRAME_PROTECTION) {
480 suite = wpa_cipher_to_suite(WPA_PROTO_RSN,
481 hapd->conf->group_mgmt_cipher);
482 if (!hostapd_config_get_radius_attr(
483 req_attr, RADIUS_ATTR_WLAN_GROUP_MGMT_CIPHER) &&
484 !radius_msg_add_attr_int32(
485 msg, RADIUS_ATTR_WLAN_GROUP_MGMT_CIPHER, suite)) {
486 wpa_printf(MSG_ERROR,
487 "Could not add WLAN-Group-Mgmt-Cipher");
488 return -1;
489 }
490 }
491
492 return 0;
493 }
494
495
add_common_radius_sta_attr(struct hostapd_data * hapd,struct hostapd_radius_attr * req_attr,struct sta_info * sta,struct radius_msg * msg)496 static int add_common_radius_sta_attr(struct hostapd_data *hapd,
497 struct hostapd_radius_attr *req_attr,
498 struct sta_info *sta,
499 struct radius_msg *msg)
500 {
501 char buf[128];
502
503 if (!hostapd_config_get_radius_attr(req_attr,
504 RADIUS_ATTR_SERVICE_TYPE) &&
505 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_SERVICE_TYPE,
506 RADIUS_SERVICE_TYPE_FRAMED)) {
507 wpa_printf(MSG_ERROR, "Could not add Service-Type");
508 return -1;
509 }
510
511 if (!hostapd_config_get_radius_attr(req_attr,
512 RADIUS_ATTR_NAS_PORT) &&
513 sta->aid > 0 &&
514 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT, sta->aid)) {
515 wpa_printf(MSG_ERROR, "Could not add NAS-Port");
516 return -1;
517 }
518
519 os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
520 MAC2STR(sta->addr));
521 buf[sizeof(buf) - 1] = '\0';
522 if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID,
523 (u8 *) buf, os_strlen(buf))) {
524 wpa_printf(MSG_ERROR, "Could not add Calling-Station-Id");
525 return -1;
526 }
527
528 if (sta->flags & WLAN_STA_PREAUTH) {
529 os_strlcpy(buf, "IEEE 802.11i Pre-Authentication",
530 sizeof(buf));
531 } else {
532 os_snprintf(buf, sizeof(buf), "CONNECT %d%sMbps %s",
533 radius_sta_rate(hapd, sta) / 2,
534 (radius_sta_rate(hapd, sta) & 1) ? ".5" : "",
535 radius_mode_txt(hapd));
536 buf[sizeof(buf) - 1] = '\0';
537 }
538 if (!hostapd_config_get_radius_attr(req_attr,
539 RADIUS_ATTR_CONNECT_INFO) &&
540 !radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO,
541 (u8 *) buf, os_strlen(buf))) {
542 wpa_printf(MSG_ERROR, "Could not add Connect-Info");
543 return -1;
544 }
545
546 if (sta->acct_session_id) {
547 os_snprintf(buf, sizeof(buf), "%016llX",
548 (unsigned long long) sta->acct_session_id);
549 if (!radius_msg_add_attr(msg, RADIUS_ATTR_ACCT_SESSION_ID,
550 (u8 *) buf, os_strlen(buf))) {
551 wpa_printf(MSG_ERROR, "Could not add Acct-Session-Id");
552 return -1;
553 }
554 }
555
556 if ((hapd->conf->wpa & 2) &&
557 !hapd->conf->disable_pmksa_caching &&
558 sta->eapol_sm && sta->eapol_sm->acct_multi_session_id) {
559 os_snprintf(buf, sizeof(buf), "%016llX",
560 (unsigned long long)
561 sta->eapol_sm->acct_multi_session_id);
562 if (!radius_msg_add_attr(
563 msg, RADIUS_ATTR_ACCT_MULTI_SESSION_ID,
564 (u8 *) buf, os_strlen(buf))) {
565 wpa_printf(MSG_INFO,
566 "Could not add Acct-Multi-Session-Id");
567 return -1;
568 }
569 }
570
571 #ifdef CONFIG_IEEE80211R_AP
572 if (hapd->conf->wpa && wpa_key_mgmt_ft(hapd->conf->wpa_key_mgmt) &&
573 sta->wpa_sm &&
574 (wpa_key_mgmt_ft(wpa_auth_sta_key_mgmt(sta->wpa_sm)) ||
575 sta->auth_alg == WLAN_AUTH_FT) &&
576 !hostapd_config_get_radius_attr(req_attr,
577 RADIUS_ATTR_MOBILITY_DOMAIN_ID) &&
578 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_MOBILITY_DOMAIN_ID,
579 WPA_GET_BE16(
580 hapd->conf->mobility_domain))) {
581 wpa_printf(MSG_ERROR, "Could not add Mobility-Domain-Id");
582 return -1;
583 }
584 #endif /* CONFIG_IEEE80211R_AP */
585
586 if ((hapd->conf->wpa || hapd->conf->osen) && sta->wpa_sm &&
587 add_common_radius_sta_attr_rsn(hapd, req_attr, sta, msg) < 0)
588 return -1;
589
590 return 0;
591 }
592
593
add_common_radius_attr(struct hostapd_data * hapd,struct hostapd_radius_attr * req_attr,struct sta_info * sta,struct radius_msg * msg)594 int add_common_radius_attr(struct hostapd_data *hapd,
595 struct hostapd_radius_attr *req_attr,
596 struct sta_info *sta,
597 struct radius_msg *msg)
598 {
599 char buf[128];
600 struct hostapd_radius_attr *attr;
601 int len;
602
603 if (!hostapd_config_get_radius_attr(req_attr,
604 RADIUS_ATTR_NAS_IP_ADDRESS) &&
605 hapd->conf->own_ip_addr.af == AF_INET &&
606 !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS,
607 (u8 *) &hapd->conf->own_ip_addr.u.v4, 4)) {
608 wpa_printf(MSG_ERROR, "Could not add NAS-IP-Address");
609 return -1;
610 }
611
612 #ifdef CONFIG_IPV6
613 if (!hostapd_config_get_radius_attr(req_attr,
614 RADIUS_ATTR_NAS_IPV6_ADDRESS) &&
615 hapd->conf->own_ip_addr.af == AF_INET6 &&
616 !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IPV6_ADDRESS,
617 (u8 *) &hapd->conf->own_ip_addr.u.v6, 16)) {
618 wpa_printf(MSG_ERROR, "Could not add NAS-IPv6-Address");
619 return -1;
620 }
621 #endif /* CONFIG_IPV6 */
622
623 if (!hostapd_config_get_radius_attr(req_attr,
624 RADIUS_ATTR_NAS_IDENTIFIER) &&
625 hapd->conf->nas_identifier &&
626 !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IDENTIFIER,
627 (u8 *) hapd->conf->nas_identifier,
628 os_strlen(hapd->conf->nas_identifier))) {
629 wpa_printf(MSG_ERROR, "Could not add NAS-Identifier");
630 return -1;
631 }
632
633 len = os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT ":",
634 MAC2STR(hapd->own_addr));
635 os_memcpy(&buf[len], hapd->conf->ssid.ssid,
636 hapd->conf->ssid.ssid_len);
637 len += hapd->conf->ssid.ssid_len;
638 if (!hostapd_config_get_radius_attr(req_attr,
639 RADIUS_ATTR_CALLED_STATION_ID) &&
640 !radius_msg_add_attr(msg, RADIUS_ATTR_CALLED_STATION_ID,
641 (u8 *) buf, len)) {
642 wpa_printf(MSG_ERROR, "Could not add Called-Station-Id");
643 return -1;
644 }
645
646 if (!hostapd_config_get_radius_attr(req_attr,
647 RADIUS_ATTR_NAS_PORT_TYPE) &&
648 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT_TYPE,
649 RADIUS_NAS_PORT_TYPE_IEEE_802_11)) {
650 wpa_printf(MSG_ERROR, "Could not add NAS-Port-Type");
651 return -1;
652 }
653
654 #ifdef CONFIG_INTERWORKING
655 if (hapd->conf->interworking &&
656 !is_zero_ether_addr(hapd->conf->hessid)) {
657 os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
658 MAC2STR(hapd->conf->hessid));
659 buf[sizeof(buf) - 1] = '\0';
660 if (!hostapd_config_get_radius_attr(req_attr,
661 RADIUS_ATTR_WLAN_HESSID) &&
662 !radius_msg_add_attr(msg, RADIUS_ATTR_WLAN_HESSID,
663 (u8 *) buf, os_strlen(buf))) {
664 wpa_printf(MSG_ERROR, "Could not add WLAN-HESSID");
665 return -1;
666 }
667 }
668 #endif /* CONFIG_INTERWORKING */
669
670 if (sta && add_common_radius_sta_attr(hapd, req_attr, sta, msg) < 0)
671 return -1;
672
673 for (attr = req_attr; attr; attr = attr->next) {
674 if (!radius_msg_add_attr(msg, attr->type,
675 wpabuf_head(attr->val),
676 wpabuf_len(attr->val))) {
677 wpa_printf(MSG_ERROR, "Could not add RADIUS attribute");
678 return -1;
679 }
680 }
681
682 return 0;
683 }
684
685
add_sqlite_radius_attr(struct hostapd_data * hapd,struct sta_info * sta,struct radius_msg * msg,int acct)686 int add_sqlite_radius_attr(struct hostapd_data *hapd, struct sta_info *sta,
687 struct radius_msg *msg, int acct)
688 {
689 #ifdef CONFIG_SQLITE
690 const char *attrtxt;
691 char addrtxt[3 * ETH_ALEN];
692 char *sql;
693 sqlite3_stmt *stmt = NULL;
694
695 if (!hapd->rad_attr_db)
696 return 0;
697
698 os_snprintf(addrtxt, sizeof(addrtxt), MACSTR, MAC2STR(sta->addr));
699
700 sql = "SELECT attr FROM radius_attributes WHERE sta=? AND (reqtype=? OR reqtype IS NULL);";
701 if (sqlite3_prepare_v2(hapd->rad_attr_db, sql, os_strlen(sql), &stmt,
702 NULL) != SQLITE_OK) {
703 wpa_printf(MSG_ERROR, "DB: Failed to prepare SQL statement: %s",
704 sqlite3_errmsg(hapd->rad_attr_db));
705 return -1;
706 }
707 sqlite3_bind_text(stmt, 1, addrtxt, os_strlen(addrtxt), SQLITE_STATIC);
708 sqlite3_bind_text(stmt, 2, acct ? "acct" : "auth", 4, SQLITE_STATIC);
709 while (sqlite3_step(stmt) == SQLITE_ROW) {
710 struct hostapd_radius_attr *attr;
711 struct radius_attr_hdr *hdr;
712
713 attrtxt = (const char *) sqlite3_column_text(stmt, 0);
714 attr = hostapd_parse_radius_attr(attrtxt);
715 if (!attr) {
716 wpa_printf(MSG_ERROR,
717 "Skipping invalid attribute from SQL: %s",
718 attrtxt);
719 continue;
720 }
721 wpa_printf(MSG_DEBUG, "Adding RADIUS attribute from SQL: %s",
722 attrtxt);
723 hdr = radius_msg_add_attr(msg, attr->type,
724 wpabuf_head(attr->val),
725 wpabuf_len(attr->val));
726 hostapd_config_free_radius_attr(attr);
727 if (!hdr) {
728 wpa_printf(MSG_ERROR,
729 "Could not add RADIUS attribute from SQL");
730 continue;
731 }
732 }
733
734 sqlite3_reset(stmt);
735 sqlite3_clear_bindings(stmt);
736 sqlite3_finalize(stmt);
737 #endif /* CONFIG_SQLITE */
738
739 return 0;
740 }
741
742
ieee802_1x_encapsulate_radius(struct hostapd_data * hapd,struct sta_info * sta,const u8 * eap,size_t len)743 void ieee802_1x_encapsulate_radius(struct hostapd_data *hapd,
744 struct sta_info *sta,
745 const u8 *eap, size_t len)
746 {
747 struct radius_msg *msg;
748 struct eapol_state_machine *sm = sta->eapol_sm;
749
750 if (!sm)
751 return;
752
753 ieee802_1x_learn_identity(hapd, sm, eap, len);
754
755 wpa_printf(MSG_DEBUG, "Encapsulating EAP message into a RADIUS packet");
756
757 sm->radius_identifier = radius_client_get_id(hapd->radius);
758 msg = radius_msg_new(RADIUS_CODE_ACCESS_REQUEST,
759 sm->radius_identifier);
760 if (!msg) {
761 wpa_printf(MSG_INFO, "Could not create new RADIUS packet");
762 return;
763 }
764
765 if (radius_msg_make_authenticator(msg) < 0) {
766 wpa_printf(MSG_INFO, "Could not make Request Authenticator");
767 goto fail;
768 }
769
770 if (!radius_msg_add_msg_auth(msg))
771 goto fail;
772
773 if (sm->identity &&
774 !radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME,
775 sm->identity, sm->identity_len)) {
776 wpa_printf(MSG_INFO, "Could not add User-Name");
777 goto fail;
778 }
779
780 if (add_common_radius_attr(hapd, hapd->conf->radius_auth_req_attr, sta,
781 msg) < 0)
782 goto fail;
783
784 if (sta && add_sqlite_radius_attr(hapd, sta, msg, 0) < 0)
785 goto fail;
786
787 /* TODO: should probably check MTU from driver config; 2304 is max for
788 * IEEE 802.11, but use 1400 to avoid problems with too large packets
789 */
790 if (!hostapd_config_get_radius_attr(hapd->conf->radius_auth_req_attr,
791 RADIUS_ATTR_FRAMED_MTU) &&
792 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_FRAMED_MTU, 1400)) {
793 wpa_printf(MSG_INFO, "Could not add Framed-MTU");
794 goto fail;
795 }
796
797 if (!radius_msg_add_eap(msg, eap, len)) {
798 wpa_printf(MSG_INFO, "Could not add EAP-Message");
799 goto fail;
800 }
801
802 /* State attribute must be copied if and only if this packet is
803 * Access-Request reply to the previous Access-Challenge */
804 if (sm->last_recv_radius &&
805 radius_msg_get_hdr(sm->last_recv_radius)->code ==
806 RADIUS_CODE_ACCESS_CHALLENGE) {
807 int res = radius_msg_copy_attr(msg, sm->last_recv_radius,
808 RADIUS_ATTR_STATE);
809 if (res < 0) {
810 wpa_printf(MSG_INFO,
811 "Could not copy State attribute from previous Access-Challenge");
812 goto fail;
813 }
814 if (res > 0)
815 wpa_printf(MSG_DEBUG, "Copied RADIUS State Attribute");
816 }
817
818 if (hapd->conf->radius_request_cui) {
819 const u8 *cui;
820 size_t cui_len;
821 /* Add previously learned CUI or nul CUI to request CUI */
822 if (sm->radius_cui) {
823 cui = wpabuf_head(sm->radius_cui);
824 cui_len = wpabuf_len(sm->radius_cui);
825 } else {
826 cui = (const u8 *) "\0";
827 cui_len = 1;
828 }
829 if (!radius_msg_add_attr(msg,
830 RADIUS_ATTR_CHARGEABLE_USER_IDENTITY,
831 cui, cui_len)) {
832 wpa_printf(MSG_ERROR, "Could not add CUI");
833 goto fail;
834 }
835 }
836
837 #ifdef CONFIG_HS20
838 if (hapd->conf->hs20) {
839 u8 ver = hapd->conf->hs20_release - 1;
840
841 if (!radius_msg_add_wfa(
842 msg, RADIUS_VENDOR_ATTR_WFA_HS20_AP_VERSION,
843 &ver, 1)) {
844 wpa_printf(MSG_ERROR,
845 "Could not add HS 2.0 AP version");
846 goto fail;
847 }
848
849 if (sta->hs20_ie && wpabuf_len(sta->hs20_ie) > 0) {
850 const u8 *pos;
851 u8 buf[3];
852 u16 id;
853
854 pos = wpabuf_head_u8(sta->hs20_ie);
855 buf[0] = (*pos) >> 4;
856 if (((*pos) & HS20_PPS_MO_ID_PRESENT) &&
857 wpabuf_len(sta->hs20_ie) >= 3)
858 id = WPA_GET_LE16(pos + 1);
859 else
860 id = 0;
861 WPA_PUT_BE16(buf + 1, id);
862 if (!radius_msg_add_wfa(
863 msg,
864 RADIUS_VENDOR_ATTR_WFA_HS20_STA_VERSION,
865 buf, sizeof(buf))) {
866 wpa_printf(MSG_ERROR,
867 "Could not add HS 2.0 STA version");
868 goto fail;
869 }
870 }
871
872 if (sta->roaming_consortium &&
873 !radius_msg_add_wfa(
874 msg, RADIUS_VENDOR_ATTR_WFA_HS20_ROAMING_CONSORTIUM,
875 wpabuf_head(sta->roaming_consortium),
876 wpabuf_len(sta->roaming_consortium))) {
877 wpa_printf(MSG_ERROR,
878 "Could not add HS 2.0 Roaming Consortium");
879 goto fail;
880 }
881
882 if (hapd->conf->t_c_filename) {
883 be32 timestamp;
884
885 if (!radius_msg_add_wfa(
886 msg,
887 RADIUS_VENDOR_ATTR_WFA_HS20_T_C_FILENAME,
888 (const u8 *) hapd->conf->t_c_filename,
889 os_strlen(hapd->conf->t_c_filename))) {
890 wpa_printf(MSG_ERROR,
891 "Could not add HS 2.0 T&C Filename");
892 goto fail;
893 }
894
895 timestamp = host_to_be32(hapd->conf->t_c_timestamp);
896 if (!radius_msg_add_wfa(
897 msg,
898 RADIUS_VENDOR_ATTR_WFA_HS20_TIMESTAMP,
899 (const u8 *) ×tamp,
900 sizeof(timestamp))) {
901 wpa_printf(MSG_ERROR,
902 "Could not add HS 2.0 Timestamp");
903 goto fail;
904 }
905 }
906 }
907 #endif /* CONFIG_HS20 */
908
909 if (radius_client_send(hapd->radius, msg, RADIUS_AUTH, sta->addr) < 0)
910 goto fail;
911
912 return;
913
914 fail:
915 radius_msg_free(msg);
916 }
917 #endif /* CONFIG_NO_RADIUS */
918
919
handle_eap_response(struct hostapd_data * hapd,struct sta_info * sta,struct eap_hdr * eap,size_t len)920 static void handle_eap_response(struct hostapd_data *hapd,
921 struct sta_info *sta, struct eap_hdr *eap,
922 size_t len)
923 {
924 u8 type, *data;
925 struct eapol_state_machine *sm = sta->eapol_sm;
926
927 if (!sm)
928 return;
929
930 data = (u8 *) (eap + 1);
931
932 if (len < sizeof(*eap) + 1) {
933 wpa_printf(MSG_INFO, "%s: too short response data", __func__);
934 return;
935 }
936
937 sm->eap_type_supp = type = data[0];
938
939 hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
940 HOSTAPD_LEVEL_DEBUG, "received EAP packet (code=%d "
941 "id=%d len=%d) from STA: EAP Response-%s (%d)",
942 eap->code, eap->identifier, be_to_host16(eap->length),
943 eap_server_get_name(0, type), type);
944
945 sm->dot1xAuthEapolRespFramesRx++;
946
947 wpabuf_free(sm->eap_if->eapRespData);
948 sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len);
949 sm->eapolEap = true;
950 }
951
952
handle_eap_initiate(struct hostapd_data * hapd,struct sta_info * sta,struct eap_hdr * eap,size_t len)953 static void handle_eap_initiate(struct hostapd_data *hapd,
954 struct sta_info *sta, struct eap_hdr *eap,
955 size_t len)
956 {
957 #ifdef CONFIG_ERP
958 u8 type, *data;
959 struct eapol_state_machine *sm = sta->eapol_sm;
960
961 if (!sm)
962 return;
963
964 if (len < sizeof(*eap) + 1) {
965 wpa_printf(MSG_INFO, "%s: too short response data", __func__);
966 return;
967 }
968
969 data = (u8 *) (eap + 1);
970 type = data[0];
971
972 hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
973 HOSTAPD_LEVEL_DEBUG,
974 "received EAP packet (code=%d id=%d len=%d) from STA: EAP Initiate type %u",
975 eap->code, eap->identifier, be_to_host16(eap->length),
976 type);
977
978 wpabuf_free(sm->eap_if->eapRespData);
979 sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len);
980 sm->eapolEap = true;
981 #endif /* CONFIG_ERP */
982 }
983
984
985 #ifndef CONFIG_NO_STDOUT_DEBUG
eap_code_str(u8 code)986 static const char * eap_code_str(u8 code)
987 {
988 switch (code) {
989 case EAP_CODE_REQUEST:
990 return "request";
991 case EAP_CODE_RESPONSE:
992 return "response";
993 case EAP_CODE_SUCCESS:
994 return "success";
995 case EAP_CODE_FAILURE:
996 return "failure";
997 case EAP_CODE_INITIATE:
998 return "initiate";
999 case EAP_CODE_FINISH:
1000 return "finish";
1001 default:
1002 return "unknown";
1003 }
1004 }
1005 #endif /* CONFIG_NO_STDOUT_DEBUG */
1006
1007
1008 /* Process incoming EAP packet from Supplicant */
handle_eap(struct hostapd_data * hapd,struct sta_info * sta,u8 * buf,size_t len)1009 static void handle_eap(struct hostapd_data *hapd, struct sta_info *sta,
1010 u8 *buf, size_t len)
1011 {
1012 struct eap_hdr *eap;
1013 u16 eap_len;
1014
1015 if (len < sizeof(*eap)) {
1016 wpa_printf(MSG_INFO, " too short EAP packet");
1017 return;
1018 }
1019
1020 eap = (struct eap_hdr *) buf;
1021
1022 eap_len = be_to_host16(eap->length);
1023 wpa_printf(MSG_DEBUG, "EAP: code=%d (%s) identifier=%d length=%d",
1024 eap->code, eap_code_str(eap->code), eap->identifier,
1025 eap_len);
1026 if (eap_len < sizeof(*eap)) {
1027 wpa_printf(MSG_DEBUG, " Invalid EAP length");
1028 return;
1029 } else if (eap_len > len) {
1030 wpa_printf(MSG_DEBUG,
1031 " Too short frame to contain this EAP packet");
1032 return;
1033 } else if (eap_len < len) {
1034 wpa_printf(MSG_DEBUG,
1035 " Ignoring %lu extra bytes after EAP packet",
1036 (unsigned long) len - eap_len);
1037 }
1038
1039 switch (eap->code) {
1040 case EAP_CODE_RESPONSE:
1041 handle_eap_response(hapd, sta, eap, eap_len);
1042 break;
1043 case EAP_CODE_INITIATE:
1044 handle_eap_initiate(hapd, sta, eap, eap_len);
1045 break;
1046 }
1047 }
1048
1049
1050 struct eapol_state_machine *
ieee802_1x_alloc_eapol_sm(struct hostapd_data * hapd,struct sta_info * sta)1051 ieee802_1x_alloc_eapol_sm(struct hostapd_data *hapd, struct sta_info *sta)
1052 {
1053 int flags = 0;
1054
1055 if (sta->flags & WLAN_STA_PREAUTH)
1056 flags |= EAPOL_SM_PREAUTH;
1057 if (sta->wpa_sm) {
1058 flags |= EAPOL_SM_USES_WPA;
1059 if (wpa_auth_sta_get_pmksa(sta->wpa_sm))
1060 flags |= EAPOL_SM_FROM_PMKSA_CACHE;
1061 }
1062 return eapol_auth_alloc(hapd->eapol_auth, sta->addr, flags,
1063 sta->wps_ie, sta->p2p_ie, sta,
1064 sta->identity, sta->radius_cui);
1065 }
1066
1067
ieee802_1x_save_eapol(struct sta_info * sta,const u8 * buf,size_t len,enum frame_encryption encrypted)1068 static void ieee802_1x_save_eapol(struct sta_info *sta, const u8 *buf,
1069 size_t len, enum frame_encryption encrypted)
1070 {
1071 if (sta->pending_eapol_rx) {
1072 wpabuf_free(sta->pending_eapol_rx->buf);
1073 } else {
1074 sta->pending_eapol_rx =
1075 os_malloc(sizeof(*sta->pending_eapol_rx));
1076 if (!sta->pending_eapol_rx)
1077 return;
1078 }
1079
1080 sta->pending_eapol_rx->buf = wpabuf_alloc_copy(buf, len);
1081 if (!sta->pending_eapol_rx->buf) {
1082 os_free(sta->pending_eapol_rx);
1083 sta->pending_eapol_rx = NULL;
1084 return;
1085 }
1086
1087 sta->pending_eapol_rx->encrypted = encrypted;
1088 os_get_reltime(&sta->pending_eapol_rx->rx_time);
1089 }
1090
1091
ieee802_1x_check_encryption(struct sta_info * sta,enum frame_encryption encrypted,u8 type)1092 static bool ieee802_1x_check_encryption(struct sta_info *sta,
1093 enum frame_encryption encrypted,
1094 u8 type)
1095 {
1096 if (encrypted != FRAME_NOT_ENCRYPTED)
1097 return true;
1098 if (type != IEEE802_1X_TYPE_EAP_PACKET &&
1099 type != IEEE802_1X_TYPE_EAPOL_START &&
1100 type != IEEE802_1X_TYPE_EAPOL_LOGOFF)
1101 return true;
1102 if (!(sta->flags & WLAN_STA_MFP))
1103 return true;
1104 return !wpa_auth_pairwise_set(sta->wpa_sm);
1105 }
1106
1107
1108 /**
1109 * ieee802_1x_receive - Process the EAPOL frames from the Supplicant
1110 * @hapd: hostapd BSS data
1111 * @sa: Source address (sender of the EAPOL frame)
1112 * @buf: EAPOL frame
1113 * @len: Length of buf in octets
1114 * @encrypted: Whether the frame was encrypted
1115 *
1116 * This function is called for each incoming EAPOL frame from the interface
1117 */
ieee802_1x_receive(struct hostapd_data * hapd,const u8 * sa,const u8 * buf,size_t len,enum frame_encryption encrypted)1118 void ieee802_1x_receive(struct hostapd_data *hapd, const u8 *sa, const u8 *buf,
1119 size_t len, enum frame_encryption encrypted)
1120 {
1121 struct sta_info *sta;
1122 struct ieee802_1x_hdr *hdr;
1123 struct ieee802_1x_eapol_key *key;
1124 u16 datalen;
1125 struct rsn_pmksa_cache_entry *pmksa;
1126 int key_mgmt;
1127
1128 if (!hapd->conf->ieee802_1x && !hapd->conf->wpa && !hapd->conf->osen &&
1129 !hapd->conf->wps_state)
1130 return;
1131
1132 wpa_printf(MSG_DEBUG, "IEEE 802.1X: %lu bytes from " MACSTR
1133 " (encrypted=%d)",
1134 (unsigned long) len, MAC2STR(sa), encrypted);
1135 sta = ap_get_sta(hapd, sa);
1136 if (!sta || (!(sta->flags & (WLAN_STA_ASSOC | WLAN_STA_PREAUTH)) &&
1137 !(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_WIRED))) {
1138 wpa_printf(MSG_DEBUG,
1139 "IEEE 802.1X data frame from not associated/Pre-authenticating STA");
1140
1141 if (sta && (sta->flags & WLAN_STA_AUTH)) {
1142 wpa_printf(MSG_DEBUG, "Saving EAPOL frame from " MACSTR
1143 " for later use", MAC2STR(sta->addr));
1144 ieee802_1x_save_eapol(sta, buf, len, encrypted);
1145 }
1146
1147 return;
1148 }
1149
1150 if (len < sizeof(*hdr)) {
1151 wpa_printf(MSG_INFO, " too short IEEE 802.1X packet");
1152 return;
1153 }
1154
1155 hdr = (struct ieee802_1x_hdr *) buf;
1156 datalen = be_to_host16(hdr->length);
1157 wpa_printf(MSG_DEBUG, " IEEE 802.1X: version=%d type=%d length=%d",
1158 hdr->version, hdr->type, datalen);
1159
1160 if (len - sizeof(*hdr) < datalen) {
1161 wpa_printf(MSG_INFO,
1162 " frame too short for this IEEE 802.1X packet");
1163 if (sta->eapol_sm)
1164 sta->eapol_sm->dot1xAuthEapLengthErrorFramesRx++;
1165 return;
1166 }
1167 if (len - sizeof(*hdr) > datalen) {
1168 wpa_printf(MSG_DEBUG,
1169 " ignoring %lu extra octets after IEEE 802.1X packet",
1170 (unsigned long) len - sizeof(*hdr) - datalen);
1171 }
1172
1173 if (sta->eapol_sm) {
1174 sta->eapol_sm->dot1xAuthLastEapolFrameVersion = hdr->version;
1175 sta->eapol_sm->dot1xAuthEapolFramesRx++;
1176 }
1177
1178 key = (struct ieee802_1x_eapol_key *) (hdr + 1);
1179 if (datalen >= sizeof(struct ieee802_1x_eapol_key) &&
1180 hdr->type == IEEE802_1X_TYPE_EAPOL_KEY &&
1181 (key->type == EAPOL_KEY_TYPE_WPA ||
1182 key->type == EAPOL_KEY_TYPE_RSN)) {
1183 wpa_receive(hapd->wpa_auth, sta->wpa_sm, (u8 *) hdr,
1184 sizeof(*hdr) + datalen);
1185 return;
1186 }
1187
1188 if (!hapd->conf->ieee802_1x && !hapd->conf->osen &&
1189 !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) {
1190 wpa_printf(MSG_DEBUG,
1191 "IEEE 802.1X: Ignore EAPOL message - 802.1X not enabled and WPS not used");
1192 return;
1193 }
1194
1195 key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm);
1196 if (key_mgmt != -1 &&
1197 (wpa_key_mgmt_wpa_psk(key_mgmt) || key_mgmt == WPA_KEY_MGMT_OWE ||
1198 key_mgmt == WPA_KEY_MGMT_DPP)) {
1199 wpa_printf(MSG_DEBUG,
1200 "IEEE 802.1X: Ignore EAPOL message - STA is using PSK");
1201 return;
1202 }
1203
1204 if (!ieee802_1x_check_encryption(sta, encrypted, hdr->type)) {
1205 wpa_printf(MSG_DEBUG,
1206 "IEEE 802.1X: Discard unencrypted EAPOL message - encryption was expected");
1207 return;
1208 }
1209
1210 if (!sta->eapol_sm) {
1211 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
1212 if (!sta->eapol_sm)
1213 return;
1214
1215 #ifdef CONFIG_WPS
1216 if (!hapd->conf->ieee802_1x && hapd->conf->wps_state) {
1217 u32 wflags = sta->flags & (WLAN_STA_WPS |
1218 WLAN_STA_WPS2 |
1219 WLAN_STA_MAYBE_WPS);
1220 if (wflags == WLAN_STA_MAYBE_WPS ||
1221 wflags == (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) {
1222 /*
1223 * Delay EAPOL frame transmission until a
1224 * possible WPS STA initiates the handshake
1225 * with EAPOL-Start. Only allow the wait to be
1226 * skipped if the STA is known to support WPS
1227 * 2.0.
1228 */
1229 wpa_printf(MSG_DEBUG,
1230 "WPS: Do not start EAPOL until EAPOL-Start is received");
1231 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
1232 }
1233 }
1234 #endif /* CONFIG_WPS */
1235
1236 sta->eapol_sm->eap_if->portEnabled = true;
1237 }
1238
1239 /* since we support version 1, we can ignore version field and proceed
1240 * as specified in version 1 standard [IEEE Std 802.1X-2001, 7.5.5] */
1241 /* TODO: actually, we are not version 1 anymore.. However, Version 2
1242 * does not change frame contents, so should be ok to process frames
1243 * more or less identically. Some changes might be needed for
1244 * verification of fields. */
1245
1246 switch (hdr->type) {
1247 case IEEE802_1X_TYPE_EAP_PACKET:
1248 handle_eap(hapd, sta, (u8 *) (hdr + 1), datalen);
1249 break;
1250
1251 case IEEE802_1X_TYPE_EAPOL_START:
1252 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1253 HOSTAPD_LEVEL_DEBUG,
1254 "received EAPOL-Start from STA");
1255 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
1256 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
1257 if (pmksa) {
1258 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
1259 HOSTAPD_LEVEL_DEBUG,
1260 "cached PMKSA available - ignore it since STA sent EAPOL-Start");
1261 wpa_auth_sta_clear_pmksa(sta->wpa_sm, pmksa);
1262 }
1263 sta->eapol_sm->eapolStart = true;
1264 sta->eapol_sm->dot1xAuthEapolStartFramesRx++;
1265 eap_server_clear_identity(sta->eapol_sm->eap);
1266 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
1267 break;
1268
1269 case IEEE802_1X_TYPE_EAPOL_LOGOFF:
1270 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1271 HOSTAPD_LEVEL_DEBUG,
1272 "received EAPOL-Logoff from STA");
1273 sta->acct_terminate_cause =
1274 RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
1275 accounting_sta_stop(hapd, sta);
1276 sta->eapol_sm->eapolLogoff = true;
1277 sta->eapol_sm->dot1xAuthEapolLogoffFramesRx++;
1278 eap_server_clear_identity(sta->eapol_sm->eap);
1279 break;
1280
1281 case IEEE802_1X_TYPE_EAPOL_KEY:
1282 wpa_printf(MSG_DEBUG, " EAPOL-Key");
1283 if (!ap_sta_is_authorized(sta)) {
1284 wpa_printf(MSG_DEBUG,
1285 " Dropped key data from unauthorized Supplicant");
1286 break;
1287 }
1288 break;
1289
1290 case IEEE802_1X_TYPE_EAPOL_ENCAPSULATED_ASF_ALERT:
1291 wpa_printf(MSG_DEBUG, " EAPOL-Encapsulated-ASF-Alert");
1292 /* TODO: implement support for this; show data */
1293 break;
1294
1295 #ifdef CONFIG_MACSEC
1296 case IEEE802_1X_TYPE_EAPOL_MKA:
1297 wpa_printf(MSG_EXCESSIVE,
1298 "EAPOL type %d will be handled by MKA", hdr->type);
1299 break;
1300 #endif /* CONFIG_MACSEC */
1301
1302 default:
1303 wpa_printf(MSG_DEBUG, " unknown IEEE 802.1X packet type");
1304 sta->eapol_sm->dot1xAuthInvalidEapolFramesRx++;
1305 break;
1306 }
1307
1308 eapol_auth_step(sta->eapol_sm);
1309 }
1310
1311
1312 /**
1313 * ieee802_1x_new_station - Start IEEE 802.1X authentication
1314 * @hapd: hostapd BSS data
1315 * @sta: The station
1316 *
1317 * This function is called to start IEEE 802.1X authentication when a new
1318 * station completes IEEE 802.11 association.
1319 */
ieee802_1x_new_station(struct hostapd_data * hapd,struct sta_info * sta)1320 void ieee802_1x_new_station(struct hostapd_data *hapd, struct sta_info *sta)
1321 {
1322 struct rsn_pmksa_cache_entry *pmksa;
1323 int reassoc = 1;
1324 int force_1x = 0;
1325 int key_mgmt;
1326
1327 #ifdef CONFIG_WPS
1328 if (hapd->conf->wps_state &&
1329 ((hapd->conf->wpa && (sta->flags & WLAN_STA_MAYBE_WPS)) ||
1330 (sta->flags & WLAN_STA_WPS))) {
1331 /*
1332 * Need to enable IEEE 802.1X/EAPOL state machines for possible
1333 * WPS handshake even if IEEE 802.1X/EAPOL is not used for
1334 * authentication in this BSS.
1335 */
1336 force_1x = 1;
1337 }
1338 #endif /* CONFIG_WPS */
1339
1340 if (!force_1x && !hapd->conf->ieee802_1x && !hapd->conf->osen) {
1341 wpa_printf(MSG_DEBUG,
1342 "IEEE 802.1X: Ignore STA - 802.1X not enabled or forced for WPS");
1343 /*
1344 * Clear any possible EAPOL authenticator state to support
1345 * reassociation change from WPS to PSK.
1346 */
1347 ieee802_1x_free_station(hapd, sta);
1348 return;
1349 }
1350
1351 key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm);
1352 if (key_mgmt != -1 &&
1353 (wpa_key_mgmt_wpa_psk(key_mgmt) || key_mgmt == WPA_KEY_MGMT_OWE ||
1354 key_mgmt == WPA_KEY_MGMT_DPP)) {
1355 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - using PSK");
1356 /*
1357 * Clear any possible EAPOL authenticator state to support
1358 * reassociation change from WPA-EAP to PSK.
1359 */
1360 ieee802_1x_free_station(hapd, sta);
1361 return;
1362 }
1363
1364 if (!sta->eapol_sm) {
1365 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1366 HOSTAPD_LEVEL_DEBUG, "start authentication");
1367 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
1368 if (!sta->eapol_sm) {
1369 hostapd_logger(hapd, sta->addr,
1370 HOSTAPD_MODULE_IEEE8021X,
1371 HOSTAPD_LEVEL_INFO,
1372 "failed to allocate state machine");
1373 return;
1374 }
1375 reassoc = 0;
1376 }
1377
1378 #ifdef CONFIG_WPS
1379 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
1380 if (!hapd->conf->ieee802_1x && hapd->conf->wps_state &&
1381 !(sta->flags & WLAN_STA_WPS2)) {
1382 /*
1383 * Delay EAPOL frame transmission until a possible WPS STA
1384 * initiates the handshake with EAPOL-Start. Only allow the
1385 * wait to be skipped if the STA is known to support WPS 2.0.
1386 */
1387 wpa_printf(MSG_DEBUG,
1388 "WPS: Do not start EAPOL until EAPOL-Start is received");
1389 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
1390 }
1391 #endif /* CONFIG_WPS */
1392
1393 sta->eapol_sm->eap_if->portEnabled = true;
1394
1395 #ifdef CONFIG_IEEE80211R_AP
1396 if (sta->auth_alg == WLAN_AUTH_FT) {
1397 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1398 HOSTAPD_LEVEL_DEBUG,
1399 "PMK from FT - skip IEEE 802.1X/EAP");
1400 /* Setup EAPOL state machines to already authenticated state
1401 * because of existing FT information from R0KH. */
1402 sta->eapol_sm->keyRun = true;
1403 sta->eapol_sm->eap_if->eapKeyAvailable = true;
1404 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
1405 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
1406 sta->eapol_sm->authSuccess = true;
1407 sta->eapol_sm->authFail = false;
1408 sta->eapol_sm->portValid = true;
1409 if (sta->eapol_sm->eap)
1410 eap_sm_notify_cached(sta->eapol_sm->eap);
1411 ap_sta_bind_vlan(hapd, sta);
1412 return;
1413 }
1414 #endif /* CONFIG_IEEE80211R_AP */
1415
1416 #ifdef CONFIG_FILS
1417 if (sta->auth_alg == WLAN_AUTH_FILS_SK ||
1418 sta->auth_alg == WLAN_AUTH_FILS_SK_PFS ||
1419 sta->auth_alg == WLAN_AUTH_FILS_PK) {
1420 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1421 HOSTAPD_LEVEL_DEBUG,
1422 "PMK from FILS - skip IEEE 802.1X/EAP");
1423 /* Setup EAPOL state machines to already authenticated state
1424 * because of existing FILS information. */
1425 sta->eapol_sm->keyRun = true;
1426 sta->eapol_sm->eap_if->eapKeyAvailable = true;
1427 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
1428 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
1429 sta->eapol_sm->authSuccess = true;
1430 sta->eapol_sm->authFail = false;
1431 sta->eapol_sm->portValid = true;
1432 if (sta->eapol_sm->eap)
1433 eap_sm_notify_cached(sta->eapol_sm->eap);
1434 wpa_auth_set_ptk_rekey_timer(sta->wpa_sm);
1435 return;
1436 }
1437 #endif /* CONFIG_FILS */
1438
1439 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
1440 if (pmksa) {
1441 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1442 HOSTAPD_LEVEL_DEBUG,
1443 "PMK from PMKSA cache - skip IEEE 802.1X/EAP");
1444 /* Setup EAPOL state machines to already authenticated state
1445 * because of existing PMKSA information in the cache. */
1446 sta->eapol_sm->keyRun = true;
1447 sta->eapol_sm->eap_if->eapKeyAvailable = true;
1448 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
1449 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
1450 sta->eapol_sm->authSuccess = true;
1451 sta->eapol_sm->authFail = false;
1452 if (sta->eapol_sm->eap)
1453 eap_sm_notify_cached(sta->eapol_sm->eap);
1454 pmksa_cache_to_eapol_data(hapd, pmksa, sta->eapol_sm);
1455 ap_sta_bind_vlan(hapd, sta);
1456 } else {
1457 if (reassoc) {
1458 /*
1459 * Force EAPOL state machines to start
1460 * re-authentication without having to wait for the
1461 * Supplicant to send EAPOL-Start.
1462 */
1463 sta->eapol_sm->reAuthenticate = true;
1464 }
1465 eapol_auth_step(sta->eapol_sm);
1466 }
1467 }
1468
1469
ieee802_1x_free_station(struct hostapd_data * hapd,struct sta_info * sta)1470 void ieee802_1x_free_station(struct hostapd_data *hapd, struct sta_info *sta)
1471 {
1472 struct eapol_state_machine *sm = sta->eapol_sm;
1473
1474 #ifdef CONFIG_HS20
1475 eloop_cancel_timeout(ieee802_1x_wnm_notif_send, hapd, sta);
1476 #endif /* CONFIG_HS20 */
1477
1478 if (sta->pending_eapol_rx) {
1479 wpabuf_free(sta->pending_eapol_rx->buf);
1480 os_free(sta->pending_eapol_rx);
1481 sta->pending_eapol_rx = NULL;
1482 }
1483
1484 if (!sm)
1485 return;
1486
1487 sta->eapol_sm = NULL;
1488
1489 #ifndef CONFIG_NO_RADIUS
1490 radius_msg_free(sm->last_recv_radius);
1491 radius_free_class(&sm->radius_class);
1492 #endif /* CONFIG_NO_RADIUS */
1493
1494 eapol_auth_free(sm);
1495 }
1496
1497
1498 #ifndef CONFIG_NO_RADIUS
ieee802_1x_decapsulate_radius(struct hostapd_data * hapd,struct sta_info * sta)1499 static void ieee802_1x_decapsulate_radius(struct hostapd_data *hapd,
1500 struct sta_info *sta)
1501 {
1502 struct wpabuf *eap;
1503 const struct eap_hdr *hdr;
1504 int eap_type = -1;
1505 char buf[64];
1506 struct radius_msg *msg;
1507 struct eapol_state_machine *sm = sta->eapol_sm;
1508
1509 if (!sm || !sm->last_recv_radius) {
1510 if (sm)
1511 sm->eap_if->aaaEapNoReq = true;
1512 return;
1513 }
1514
1515 msg = sm->last_recv_radius;
1516
1517 eap = radius_msg_get_eap(msg);
1518 if (!eap) {
1519 /* RFC 3579, Chap. 2.6.3:
1520 * RADIUS server SHOULD NOT send Access-Reject/no EAP-Message
1521 * attribute */
1522 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1523 HOSTAPD_LEVEL_WARNING,
1524 "could not extract EAP-Message from RADIUS message");
1525 sm->eap_if->aaaEapNoReq = true;
1526 return;
1527 }
1528
1529 if (wpabuf_len(eap) < sizeof(*hdr)) {
1530 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1531 HOSTAPD_LEVEL_WARNING,
1532 "too short EAP packet received from authentication server");
1533 wpabuf_free(eap);
1534 sm->eap_if->aaaEapNoReq = true;
1535 return;
1536 }
1537
1538 if (wpabuf_len(eap) > sizeof(*hdr))
1539 eap_type = (wpabuf_head_u8(eap))[sizeof(*hdr)];
1540
1541 hdr = wpabuf_head(eap);
1542 switch (hdr->code) {
1543 case EAP_CODE_REQUEST:
1544 if (eap_type >= 0)
1545 sm->eap_type_authsrv = eap_type;
1546 os_snprintf(buf, sizeof(buf), "EAP-Request-%s (%d)",
1547 eap_server_get_name(0, eap_type), eap_type);
1548 break;
1549 case EAP_CODE_RESPONSE:
1550 os_snprintf(buf, sizeof(buf), "EAP Response-%s (%d)",
1551 eap_server_get_name(0, eap_type), eap_type);
1552 break;
1553 case EAP_CODE_SUCCESS:
1554 os_strlcpy(buf, "EAP Success", sizeof(buf));
1555 break;
1556 case EAP_CODE_FAILURE:
1557 os_strlcpy(buf, "EAP Failure", sizeof(buf));
1558 break;
1559 default:
1560 os_strlcpy(buf, "unknown EAP code", sizeof(buf));
1561 break;
1562 }
1563 buf[sizeof(buf) - 1] = '\0';
1564 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1565 HOSTAPD_LEVEL_DEBUG,
1566 "decapsulated EAP packet (code=%d id=%d len=%d) from RADIUS server: %s",
1567 hdr->code, hdr->identifier, be_to_host16(hdr->length),
1568 buf);
1569 sm->eap_if->aaaEapReq = true;
1570
1571 wpabuf_free(sm->eap_if->aaaEapReqData);
1572 sm->eap_if->aaaEapReqData = eap;
1573 }
1574
1575
ieee802_1x_get_keys(struct hostapd_data * hapd,struct sta_info * sta,struct radius_msg * msg,struct radius_msg * req,const u8 * shared_secret,size_t shared_secret_len)1576 static void ieee802_1x_get_keys(struct hostapd_data *hapd,
1577 struct sta_info *sta, struct radius_msg *msg,
1578 struct radius_msg *req,
1579 const u8 *shared_secret,
1580 size_t shared_secret_len)
1581 {
1582 struct radius_ms_mppe_keys *keys;
1583 u8 *buf;
1584 size_t len;
1585 struct eapol_state_machine *sm = sta->eapol_sm;
1586
1587 if (!sm)
1588 return;
1589
1590 keys = radius_msg_get_ms_keys(msg, req, shared_secret,
1591 shared_secret_len);
1592
1593 if (keys && keys->send && keys->recv) {
1594 len = keys->send_len + keys->recv_len;
1595 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Send-Key",
1596 keys->send, keys->send_len);
1597 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Recv-Key",
1598 keys->recv, keys->recv_len);
1599
1600 os_free(sm->eap_if->aaaEapKeyData);
1601 sm->eap_if->aaaEapKeyData = os_malloc(len);
1602 if (sm->eap_if->aaaEapKeyData) {
1603 os_memcpy(sm->eap_if->aaaEapKeyData, keys->recv,
1604 keys->recv_len);
1605 os_memcpy(sm->eap_if->aaaEapKeyData + keys->recv_len,
1606 keys->send, keys->send_len);
1607 sm->eap_if->aaaEapKeyDataLen = len;
1608 sm->eap_if->aaaEapKeyAvailable = true;
1609 }
1610 } else {
1611 wpa_printf(MSG_DEBUG,
1612 "MS-MPPE: 1x_get_keys, could not get keys: %p send: %p recv: %p",
1613 keys, keys ? keys->send : NULL,
1614 keys ? keys->recv : NULL);
1615 }
1616
1617 if (keys) {
1618 os_free(keys->send);
1619 os_free(keys->recv);
1620 os_free(keys);
1621 }
1622
1623 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_EAP_KEY_NAME, &buf, &len,
1624 NULL) == 0) {
1625 os_free(sm->eap_if->eapSessionId);
1626 sm->eap_if->eapSessionId = os_memdup(buf, len);
1627 if (sm->eap_if->eapSessionId) {
1628 sm->eap_if->eapSessionIdLen = len;
1629 wpa_hexdump(MSG_DEBUG, "EAP-Key Name",
1630 sm->eap_if->eapSessionId,
1631 sm->eap_if->eapSessionIdLen);
1632 }
1633 } else {
1634 sm->eap_if->eapSessionIdLen = 0;
1635 }
1636 }
1637
1638
ieee802_1x_store_radius_class(struct hostapd_data * hapd,struct sta_info * sta,struct radius_msg * msg)1639 static void ieee802_1x_store_radius_class(struct hostapd_data *hapd,
1640 struct sta_info *sta,
1641 struct radius_msg *msg)
1642 {
1643 u8 *attr_class;
1644 size_t class_len;
1645 struct eapol_state_machine *sm = sta->eapol_sm;
1646 int count, i;
1647 struct radius_attr_data *nclass;
1648 size_t nclass_count;
1649
1650 if (!hapd->conf->radius->acct_server || !hapd->radius || !sm)
1651 return;
1652
1653 radius_free_class(&sm->radius_class);
1654 count = radius_msg_count_attr(msg, RADIUS_ATTR_CLASS, 1);
1655 if (count <= 0)
1656 return;
1657
1658 nclass = os_calloc(count, sizeof(struct radius_attr_data));
1659 if (!nclass)
1660 return;
1661
1662 nclass_count = 0;
1663
1664 attr_class = NULL;
1665 for (i = 0; i < count; i++) {
1666 do {
1667 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CLASS,
1668 &attr_class, &class_len,
1669 attr_class) < 0) {
1670 i = count;
1671 break;
1672 }
1673 } while (class_len < 1);
1674
1675 nclass[nclass_count].data = os_memdup(attr_class, class_len);
1676 if (!nclass[nclass_count].data)
1677 break;
1678
1679 nclass[nclass_count].len = class_len;
1680 nclass_count++;
1681 }
1682
1683 sm->radius_class.attr = nclass;
1684 sm->radius_class.count = nclass_count;
1685 wpa_printf(MSG_DEBUG,
1686 "IEEE 802.1X: Stored %lu RADIUS Class attributes for "
1687 MACSTR,
1688 (unsigned long) sm->radius_class.count,
1689 MAC2STR(sta->addr));
1690 }
1691
1692
1693 /* Update sta->identity based on User-Name attribute in Access-Accept */
ieee802_1x_update_sta_identity(struct hostapd_data * hapd,struct sta_info * sta,struct radius_msg * msg)1694 static void ieee802_1x_update_sta_identity(struct hostapd_data *hapd,
1695 struct sta_info *sta,
1696 struct radius_msg *msg)
1697 {
1698 u8 *buf, *identity;
1699 size_t len;
1700 struct eapol_state_machine *sm = sta->eapol_sm;
1701
1702 if (!sm)
1703 return;
1704
1705 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_USER_NAME, &buf, &len,
1706 NULL) < 0)
1707 return;
1708
1709 identity = (u8 *) dup_binstr(buf, len);
1710 if (!identity)
1711 return;
1712
1713 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1714 HOSTAPD_LEVEL_DEBUG,
1715 "old identity '%s' updated with User-Name from Access-Accept '%s'",
1716 sm->identity ? (char *) sm->identity : "N/A",
1717 (char *) identity);
1718
1719 os_free(sm->identity);
1720 sm->identity = identity;
1721 sm->identity_len = len;
1722 }
1723
1724
1725 /* Update CUI based on Chargeable-User-Identity attribute in Access-Accept */
ieee802_1x_update_sta_cui(struct hostapd_data * hapd,struct sta_info * sta,struct radius_msg * msg)1726 static void ieee802_1x_update_sta_cui(struct hostapd_data *hapd,
1727 struct sta_info *sta,
1728 struct radius_msg *msg)
1729 {
1730 struct eapol_state_machine *sm = sta->eapol_sm;
1731 struct wpabuf *cui;
1732 u8 *buf;
1733 size_t len;
1734
1735 if (!sm)
1736 return;
1737
1738 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CHARGEABLE_USER_IDENTITY,
1739 &buf, &len, NULL) < 0)
1740 return;
1741
1742 cui = wpabuf_alloc_copy(buf, len);
1743 if (!cui)
1744 return;
1745
1746 wpabuf_free(sm->radius_cui);
1747 sm->radius_cui = cui;
1748 }
1749
1750
1751 #ifdef CONFIG_HS20
1752
ieee802_1x_hs20_sub_rem(struct sta_info * sta,u8 * pos,size_t len)1753 static void ieee802_1x_hs20_sub_rem(struct sta_info *sta, u8 *pos, size_t len)
1754 {
1755 sta->remediation = 1;
1756 os_free(sta->remediation_url);
1757 if (len > 2) {
1758 sta->remediation_url = os_malloc(len);
1759 if (!sta->remediation_url)
1760 return;
1761 sta->remediation_method = pos[0];
1762 os_memcpy(sta->remediation_url, pos + 1, len - 1);
1763 sta->remediation_url[len - 1] = '\0';
1764 wpa_printf(MSG_DEBUG,
1765 "HS 2.0: Subscription remediation needed for "
1766 MACSTR " - server method %u URL %s",
1767 MAC2STR(sta->addr), sta->remediation_method,
1768 sta->remediation_url);
1769 } else {
1770 sta->remediation_url = NULL;
1771 wpa_printf(MSG_DEBUG,
1772 "HS 2.0: Subscription remediation needed for "
1773 MACSTR, MAC2STR(sta->addr));
1774 }
1775 /* TODO: assign the STA into remediation VLAN or add filtering */
1776 }
1777
1778
ieee802_1x_hs20_deauth_req(struct hostapd_data * hapd,struct sta_info * sta,const u8 * pos,size_t len)1779 static void ieee802_1x_hs20_deauth_req(struct hostapd_data *hapd,
1780 struct sta_info *sta, const u8 *pos,
1781 size_t len)
1782 {
1783 size_t url_len;
1784 unsigned int timeout;
1785
1786 if (len < 3)
1787 return; /* Malformed information */
1788 url_len = len - 3;
1789 sta->hs20_deauth_requested = 1;
1790 sta->hs20_deauth_on_ack = url_len == 0;
1791 wpa_printf(MSG_DEBUG,
1792 "HS 2.0: Deauthentication request - Code %u Re-auth Delay %u URL length %zu",
1793 *pos, WPA_GET_LE16(pos + 1), url_len);
1794 wpabuf_free(sta->hs20_deauth_req);
1795 sta->hs20_deauth_req = wpabuf_alloc(len + 1);
1796 if (sta->hs20_deauth_req) {
1797 wpabuf_put_data(sta->hs20_deauth_req, pos, 3);
1798 wpabuf_put_u8(sta->hs20_deauth_req, url_len);
1799 wpabuf_put_data(sta->hs20_deauth_req, pos + 3, url_len);
1800 }
1801 timeout = hapd->conf->hs20_deauth_req_timeout;
1802 /* If there is no URL, no need to provide time to fetch it. Use a short
1803 * timeout here to allow maximum time for completing 4-way handshake and
1804 * WNM-Notification delivery. Acknowledgement of the frame will result
1805 * in cutting this wait further. */
1806 if (!url_len && timeout > 2)
1807 timeout = 2;
1808 ap_sta_session_timeout(hapd, sta, timeout);
1809 }
1810
1811
ieee802_1x_hs20_session_info(struct hostapd_data * hapd,struct sta_info * sta,u8 * pos,size_t len,int session_timeout)1812 static void ieee802_1x_hs20_session_info(struct hostapd_data *hapd,
1813 struct sta_info *sta, u8 *pos,
1814 size_t len, int session_timeout)
1815 {
1816 unsigned int swt;
1817 int warning_time, beacon_int;
1818
1819 if (len < 1)
1820 return; /* Malformed information */
1821 os_free(sta->hs20_session_info_url);
1822 sta->hs20_session_info_url = os_malloc(len);
1823 if (!sta->hs20_session_info_url)
1824 return;
1825 swt = pos[0];
1826 os_memcpy(sta->hs20_session_info_url, pos + 1, len - 1);
1827 sta->hs20_session_info_url[len - 1] = '\0';
1828 wpa_printf(MSG_DEBUG,
1829 "HS 2.0: Session Information URL='%s' SWT=%u (session_timeout=%d)",
1830 sta->hs20_session_info_url, swt, session_timeout);
1831 if (session_timeout < 0) {
1832 wpa_printf(MSG_DEBUG,
1833 "HS 2.0: No Session-Timeout set - ignore session info URL");
1834 return;
1835 }
1836 if (swt == 255)
1837 swt = 1; /* Use one minute as the AP selected value */
1838
1839 if ((unsigned int) session_timeout < swt * 60)
1840 warning_time = 0;
1841 else
1842 warning_time = session_timeout - swt * 60;
1843
1844 beacon_int = hapd->iconf->beacon_int;
1845 if (beacon_int < 1)
1846 beacon_int = 100; /* best guess */
1847 sta->hs20_disassoc_timer = swt * 60 * 1000 / beacon_int * 125 / 128;
1848 if (sta->hs20_disassoc_timer > 65535)
1849 sta->hs20_disassoc_timer = 65535;
1850
1851 ap_sta_session_warning_timeout(hapd, sta, warning_time);
1852 }
1853
1854
ieee802_1x_hs20_t_c_filtering(struct hostapd_data * hapd,struct sta_info * sta,u8 * pos,size_t len)1855 static void ieee802_1x_hs20_t_c_filtering(struct hostapd_data *hapd,
1856 struct sta_info *sta, u8 *pos,
1857 size_t len)
1858 {
1859 if (len < 4)
1860 return; /* Malformed information */
1861 wpa_printf(MSG_DEBUG,
1862 "HS 2.0: Terms and Conditions filtering %02x %02x %02x %02x",
1863 pos[0], pos[1], pos[2], pos[3]);
1864 hs20_t_c_filtering(hapd, sta, pos[0] & BIT(0));
1865 }
1866
1867
ieee802_1x_hs20_t_c_url(struct hostapd_data * hapd,struct sta_info * sta,u8 * pos,size_t len)1868 static void ieee802_1x_hs20_t_c_url(struct hostapd_data *hapd,
1869 struct sta_info *sta, u8 *pos, size_t len)
1870 {
1871 os_free(sta->t_c_url);
1872 sta->t_c_url = os_malloc(len + 1);
1873 if (!sta->t_c_url)
1874 return;
1875 os_memcpy(sta->t_c_url, pos, len);
1876 sta->t_c_url[len] = '\0';
1877 wpa_printf(MSG_DEBUG,
1878 "HS 2.0: Terms and Conditions URL %s", sta->t_c_url);
1879 }
1880
1881 #endif /* CONFIG_HS20 */
1882
1883
ieee802_1x_check_hs20(struct hostapd_data * hapd,struct sta_info * sta,struct radius_msg * msg,int session_timeout)1884 static void ieee802_1x_check_hs20(struct hostapd_data *hapd,
1885 struct sta_info *sta,
1886 struct radius_msg *msg,
1887 int session_timeout)
1888 {
1889 #ifdef CONFIG_HS20
1890 u8 *buf, *pos, *end, type, sublen;
1891 size_t len;
1892
1893 buf = NULL;
1894 sta->remediation = 0;
1895 sta->hs20_deauth_requested = 0;
1896 sta->hs20_deauth_on_ack = 0;
1897
1898 for (;;) {
1899 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_VENDOR_SPECIFIC,
1900 &buf, &len, buf) < 0)
1901 break;
1902 if (len < 6)
1903 continue;
1904 pos = buf;
1905 end = buf + len;
1906 if (WPA_GET_BE32(pos) != RADIUS_VENDOR_ID_WFA)
1907 continue;
1908 pos += 4;
1909
1910 type = *pos++;
1911 sublen = *pos++;
1912 if (sublen < 2)
1913 continue; /* invalid length */
1914 sublen -= 2; /* skip header */
1915 if (pos + sublen > end)
1916 continue; /* invalid WFA VSA */
1917
1918 switch (type) {
1919 case RADIUS_VENDOR_ATTR_WFA_HS20_SUBSCR_REMEDIATION:
1920 ieee802_1x_hs20_sub_rem(sta, pos, sublen);
1921 break;
1922 case RADIUS_VENDOR_ATTR_WFA_HS20_DEAUTH_REQ:
1923 ieee802_1x_hs20_deauth_req(hapd, sta, pos, sublen);
1924 break;
1925 case RADIUS_VENDOR_ATTR_WFA_HS20_SESSION_INFO_URL:
1926 ieee802_1x_hs20_session_info(hapd, sta, pos, sublen,
1927 session_timeout);
1928 break;
1929 case RADIUS_VENDOR_ATTR_WFA_HS20_T_C_FILTERING:
1930 ieee802_1x_hs20_t_c_filtering(hapd, sta, pos, sublen);
1931 break;
1932 case RADIUS_VENDOR_ATTR_WFA_HS20_T_C_URL:
1933 ieee802_1x_hs20_t_c_url(hapd, sta, pos, sublen);
1934 break;
1935 }
1936 }
1937 #endif /* CONFIG_HS20 */
1938 }
1939
1940
1941 struct sta_id_search {
1942 u8 identifier;
1943 struct eapol_state_machine *sm;
1944 };
1945
1946
ieee802_1x_select_radius_identifier(struct hostapd_data * hapd,struct sta_info * sta,void * ctx)1947 static int ieee802_1x_select_radius_identifier(struct hostapd_data *hapd,
1948 struct sta_info *sta,
1949 void *ctx)
1950 {
1951 struct sta_id_search *id_search = ctx;
1952 struct eapol_state_machine *sm = sta->eapol_sm;
1953
1954 if (sm && sm->radius_identifier >= 0 &&
1955 sm->radius_identifier == id_search->identifier) {
1956 id_search->sm = sm;
1957 return 1;
1958 }
1959 return 0;
1960 }
1961
1962
1963 static struct eapol_state_machine *
ieee802_1x_search_radius_identifier(struct hostapd_data * hapd,u8 identifier)1964 ieee802_1x_search_radius_identifier(struct hostapd_data *hapd, u8 identifier)
1965 {
1966 struct sta_id_search id_search;
1967
1968 id_search.identifier = identifier;
1969 id_search.sm = NULL;
1970 ap_for_each_sta(hapd, ieee802_1x_select_radius_identifier, &id_search);
1971 return id_search.sm;
1972 }
1973
1974
1975 #ifndef CONFIG_NO_VLAN
ieee802_1x_update_vlan(struct radius_msg * msg,struct hostapd_data * hapd,struct sta_info * sta)1976 static int ieee802_1x_update_vlan(struct radius_msg *msg,
1977 struct hostapd_data *hapd,
1978 struct sta_info *sta)
1979 {
1980 struct vlan_description vlan_desc;
1981
1982 os_memset(&vlan_desc, 0, sizeof(vlan_desc));
1983 vlan_desc.notempty = !!radius_msg_get_vlanid(msg, &vlan_desc.untagged,
1984 MAX_NUM_TAGGED_VLAN,
1985 vlan_desc.tagged);
1986
1987 if (vlan_desc.notempty &&
1988 !hostapd_vlan_valid(hapd->conf->vlan, &vlan_desc)) {
1989 sta->eapol_sm->authFail = true;
1990 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
1991 HOSTAPD_LEVEL_INFO,
1992 "Invalid VLAN %d%s received from RADIUS server",
1993 vlan_desc.untagged,
1994 vlan_desc.tagged[0] ? "+" : "");
1995 os_memset(&vlan_desc, 0, sizeof(vlan_desc));
1996 ap_sta_set_vlan(hapd, sta, &vlan_desc);
1997 return -1;
1998 }
1999
2000 if (hapd->conf->ssid.dynamic_vlan == DYNAMIC_VLAN_REQUIRED &&
2001 !vlan_desc.notempty) {
2002 sta->eapol_sm->authFail = true;
2003 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
2004 HOSTAPD_LEVEL_INFO,
2005 "authentication server did not include required VLAN ID in Access-Accept");
2006 return -1;
2007 }
2008
2009 return ap_sta_set_vlan(hapd, sta, &vlan_desc);
2010 }
2011 #endif /* CONFIG_NO_VLAN */
2012
2013
2014 /**
2015 * ieee802_1x_receive_auth - Process RADIUS frames from Authentication Server
2016 * @msg: RADIUS response message
2017 * @req: RADIUS request message
2018 * @shared_secret: RADIUS shared secret
2019 * @shared_secret_len: Length of shared_secret in octets
2020 * @data: Context data (struct hostapd_data *)
2021 * Returns: Processing status
2022 */
2023 static RadiusRxResult
ieee802_1x_receive_auth(struct radius_msg * msg,struct radius_msg * req,const u8 * shared_secret,size_t shared_secret_len,void * data)2024 ieee802_1x_receive_auth(struct radius_msg *msg, struct radius_msg *req,
2025 const u8 *shared_secret, size_t shared_secret_len,
2026 void *data)
2027 {
2028 struct hostapd_data *hapd = data;
2029 struct sta_info *sta;
2030 u32 session_timeout = 0, termination_action, acct_interim_interval;
2031 int session_timeout_set;
2032 u32 reason_code;
2033 struct eapol_state_machine *sm;
2034 int override_eapReq = 0;
2035 struct radius_hdr *hdr = radius_msg_get_hdr(msg);
2036
2037 sm = ieee802_1x_search_radius_identifier(hapd, hdr->identifier);
2038 if (!sm) {
2039 wpa_printf(MSG_DEBUG,
2040 "IEEE 802.1X: Could not find matching station for this RADIUS message");
2041 return RADIUS_RX_UNKNOWN;
2042 }
2043 sta = sm->sta;
2044
2045 if (radius_msg_verify(msg, shared_secret, shared_secret_len, req, 1)) {
2046 wpa_printf(MSG_INFO,
2047 "Incoming RADIUS packet did not have correct Message-Authenticator - dropped");
2048 return RADIUS_RX_INVALID_AUTHENTICATOR;
2049 }
2050
2051 if (hdr->code != RADIUS_CODE_ACCESS_ACCEPT &&
2052 hdr->code != RADIUS_CODE_ACCESS_REJECT &&
2053 hdr->code != RADIUS_CODE_ACCESS_CHALLENGE) {
2054 wpa_printf(MSG_INFO, "Unknown RADIUS message code");
2055 return RADIUS_RX_UNKNOWN;
2056 }
2057
2058 sm->radius_identifier = -1;
2059 wpa_printf(MSG_DEBUG, "RADIUS packet matching with station " MACSTR,
2060 MAC2STR(sta->addr));
2061
2062 radius_msg_free(sm->last_recv_radius);
2063 sm->last_recv_radius = msg;
2064
2065 session_timeout_set =
2066 !radius_msg_get_attr_int32(msg, RADIUS_ATTR_SESSION_TIMEOUT,
2067 &session_timeout);
2068 if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_TERMINATION_ACTION,
2069 &termination_action))
2070 termination_action = RADIUS_TERMINATION_ACTION_DEFAULT;
2071
2072 if (hapd->conf->acct_interim_interval == 0 &&
2073 hdr->code == RADIUS_CODE_ACCESS_ACCEPT &&
2074 radius_msg_get_attr_int32(msg, RADIUS_ATTR_ACCT_INTERIM_INTERVAL,
2075 &acct_interim_interval) == 0) {
2076 if (acct_interim_interval < 60) {
2077 hostapd_logger(hapd, sta->addr,
2078 HOSTAPD_MODULE_IEEE8021X,
2079 HOSTAPD_LEVEL_INFO,
2080 "ignored too small Acct-Interim-Interval %d",
2081 acct_interim_interval);
2082 } else
2083 sta->acct_interim_interval = acct_interim_interval;
2084 }
2085
2086
2087 switch (hdr->code) {
2088 case RADIUS_CODE_ACCESS_ACCEPT:
2089 #ifndef CONFIG_NO_VLAN
2090 if (hapd->conf->ssid.dynamic_vlan != DYNAMIC_VLAN_DISABLED &&
2091 ieee802_1x_update_vlan(msg, hapd, sta) < 0)
2092 break;
2093
2094 if (sta->vlan_id > 0) {
2095 hostapd_logger(hapd, sta->addr,
2096 HOSTAPD_MODULE_RADIUS,
2097 HOSTAPD_LEVEL_INFO,
2098 "VLAN ID %d", sta->vlan_id);
2099 }
2100
2101 if ((sta->flags & WLAN_STA_ASSOC) &&
2102 ap_sta_bind_vlan(hapd, sta) < 0)
2103 break;
2104 #endif /* CONFIG_NO_VLAN */
2105
2106 sta->session_timeout_set = !!session_timeout_set;
2107 os_get_reltime(&sta->session_timeout);
2108 sta->session_timeout.sec += session_timeout;
2109
2110 /* RFC 3580, Ch. 3.17 */
2111 if (session_timeout_set && termination_action ==
2112 RADIUS_TERMINATION_ACTION_RADIUS_REQUEST)
2113 sm->reAuthPeriod = session_timeout;
2114 else if (session_timeout_set)
2115 ap_sta_session_timeout(hapd, sta, session_timeout);
2116 else
2117 ap_sta_no_session_timeout(hapd, sta);
2118
2119 sm->eap_if->aaaSuccess = true;
2120 override_eapReq = 1;
2121 ieee802_1x_get_keys(hapd, sta, msg, req, shared_secret,
2122 shared_secret_len);
2123 ieee802_1x_store_radius_class(hapd, sta, msg);
2124 ieee802_1x_update_sta_identity(hapd, sta, msg);
2125 ieee802_1x_update_sta_cui(hapd, sta, msg);
2126 ieee802_1x_check_hs20(hapd, sta, msg,
2127 session_timeout_set ?
2128 (int) session_timeout : -1);
2129 break;
2130 case RADIUS_CODE_ACCESS_REJECT:
2131 sm->eap_if->aaaFail = true;
2132 override_eapReq = 1;
2133 if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_WLAN_REASON_CODE,
2134 &reason_code) == 0) {
2135 wpa_printf(MSG_DEBUG,
2136 "RADIUS server indicated WLAN-Reason-Code %u in Access-Reject for "
2137 MACSTR, reason_code, MAC2STR(sta->addr));
2138 sta->disconnect_reason_code = reason_code;
2139 }
2140 break;
2141 case RADIUS_CODE_ACCESS_CHALLENGE:
2142 sm->eap_if->aaaEapReq = true;
2143 if (session_timeout_set) {
2144 /* RFC 2869, Ch. 2.3.2; RFC 3580, Ch. 3.17 */
2145 sm->eap_if->aaaMethodTimeout = session_timeout;
2146 hostapd_logger(hapd, sm->addr,
2147 HOSTAPD_MODULE_IEEE8021X,
2148 HOSTAPD_LEVEL_DEBUG,
2149 "using EAP timeout of %d seconds (from RADIUS)",
2150 sm->eap_if->aaaMethodTimeout);
2151 } else {
2152 /*
2153 * Use dynamic retransmission behavior per EAP
2154 * specification.
2155 */
2156 sm->eap_if->aaaMethodTimeout = 0;
2157 }
2158 break;
2159 }
2160
2161 ieee802_1x_decapsulate_radius(hapd, sta);
2162 if (override_eapReq)
2163 sm->eap_if->aaaEapReq = false;
2164
2165 #ifdef CONFIG_FILS
2166 #ifdef NEED_AP_MLME
2167 if (sta->flags &
2168 (WLAN_STA_PENDING_FILS_ERP | WLAN_STA_PENDING_PASN_FILS_ERP)) {
2169 /* TODO: Add a PMKSA entry on success? */
2170 ieee802_11_finish_fils_auth(
2171 hapd, sta, hdr->code == RADIUS_CODE_ACCESS_ACCEPT,
2172 sm->eap_if->aaaEapReqData,
2173 sm->eap_if->aaaEapKeyData,
2174 sm->eap_if->aaaEapKeyDataLen);
2175 }
2176 #endif /* NEED_AP_MLME */
2177 #endif /* CONFIG_FILS */
2178
2179 eapol_auth_step(sm);
2180
2181 return RADIUS_RX_QUEUED;
2182 }
2183 #endif /* CONFIG_NO_RADIUS */
2184
2185
ieee802_1x_abort_auth(struct hostapd_data * hapd,struct sta_info * sta)2186 void ieee802_1x_abort_auth(struct hostapd_data *hapd, struct sta_info *sta)
2187 {
2188 struct eapol_state_machine *sm = sta->eapol_sm;
2189
2190 if (!sm)
2191 return;
2192
2193 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
2194 HOSTAPD_LEVEL_DEBUG, "aborting authentication");
2195
2196 #ifndef CONFIG_NO_RADIUS
2197 radius_msg_free(sm->last_recv_radius);
2198 sm->last_recv_radius = NULL;
2199 #endif /* CONFIG_NO_RADIUS */
2200
2201 if (sm->eap_if->eapTimeout) {
2202 /*
2203 * Disconnect the STA since it did not reply to the last EAP
2204 * request and we cannot continue EAP processing (EAP-Failure
2205 * could only be sent if the EAP peer actually replied).
2206 */
2207 wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "EAP Timeout, STA " MACSTR,
2208 MAC2STR(sta->addr));
2209
2210 sm->eap_if->portEnabled = false;
2211 ap_sta_disconnect(hapd, sta, sta->addr,
2212 WLAN_REASON_PREV_AUTH_NOT_VALID);
2213 }
2214 }
2215
2216
2217 #ifdef CONFIG_WEP
2218
ieee802_1x_rekey_broadcast(struct hostapd_data * hapd)2219 static int ieee802_1x_rekey_broadcast(struct hostapd_data *hapd)
2220 {
2221 struct eapol_authenticator *eapol = hapd->eapol_auth;
2222
2223 if (hapd->conf->default_wep_key_len < 1)
2224 return 0;
2225
2226 os_free(eapol->default_wep_key);
2227 eapol->default_wep_key = os_malloc(hapd->conf->default_wep_key_len);
2228 if (!eapol->default_wep_key ||
2229 random_get_bytes(eapol->default_wep_key,
2230 hapd->conf->default_wep_key_len)) {
2231 wpa_printf(MSG_INFO, "Could not generate random WEP key");
2232 os_free(eapol->default_wep_key);
2233 eapol->default_wep_key = NULL;
2234 return -1;
2235 }
2236
2237 wpa_hexdump_key(MSG_DEBUG, "IEEE 802.1X: New default WEP key",
2238 eapol->default_wep_key,
2239 hapd->conf->default_wep_key_len);
2240
2241 return 0;
2242 }
2243
2244
ieee802_1x_sta_key_available(struct hostapd_data * hapd,struct sta_info * sta,void * ctx)2245 static int ieee802_1x_sta_key_available(struct hostapd_data *hapd,
2246 struct sta_info *sta, void *ctx)
2247 {
2248 if (sta->eapol_sm) {
2249 sta->eapol_sm->eap_if->eapKeyAvailable = true;
2250 eapol_auth_step(sta->eapol_sm);
2251 }
2252 return 0;
2253 }
2254
2255
ieee802_1x_rekey(void * eloop_ctx,void * timeout_ctx)2256 static void ieee802_1x_rekey(void *eloop_ctx, void *timeout_ctx)
2257 {
2258 struct hostapd_data *hapd = eloop_ctx;
2259 struct eapol_authenticator *eapol = hapd->eapol_auth;
2260
2261 if (eapol->default_wep_key_idx >= 3)
2262 eapol->default_wep_key_idx =
2263 hapd->conf->individual_wep_key_len > 0 ? 1 : 0;
2264 else
2265 eapol->default_wep_key_idx++;
2266
2267 wpa_printf(MSG_DEBUG, "IEEE 802.1X: New default WEP key index %d",
2268 eapol->default_wep_key_idx);
2269
2270 if (ieee802_1x_rekey_broadcast(hapd)) {
2271 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
2272 HOSTAPD_LEVEL_WARNING,
2273 "failed to generate a new broadcast key");
2274 os_free(eapol->default_wep_key);
2275 eapol->default_wep_key = NULL;
2276 return;
2277 }
2278
2279 /* TODO: Could setup key for RX here, but change default TX keyid only
2280 * after new broadcast key has been sent to all stations. */
2281 if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
2282 broadcast_ether_addr,
2283 eapol->default_wep_key_idx, 0, 1, NULL, 0,
2284 eapol->default_wep_key,
2285 hapd->conf->default_wep_key_len,
2286 KEY_FLAG_GROUP_RX_TX_DEFAULT)) {
2287 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
2288 HOSTAPD_LEVEL_WARNING,
2289 "failed to configure a new broadcast key");
2290 os_free(eapol->default_wep_key);
2291 eapol->default_wep_key = NULL;
2292 return;
2293 }
2294
2295 ap_for_each_sta(hapd, ieee802_1x_sta_key_available, NULL);
2296
2297 if (hapd->conf->wep_rekeying_period > 0) {
2298 eloop_register_timeout(hapd->conf->wep_rekeying_period, 0,
2299 ieee802_1x_rekey, hapd, NULL);
2300 }
2301 }
2302
2303 #endif /* CONFIG_WEP */
2304
2305
ieee802_1x_eapol_send(void * ctx,void * sta_ctx,u8 type,const u8 * data,size_t datalen)2306 static void ieee802_1x_eapol_send(void *ctx, void *sta_ctx, u8 type,
2307 const u8 *data, size_t datalen)
2308 {
2309 #ifdef CONFIG_WPS
2310 struct sta_info *sta = sta_ctx;
2311
2312 if ((sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) ==
2313 WLAN_STA_MAYBE_WPS) {
2314 const u8 *identity;
2315 size_t identity_len;
2316 struct eapol_state_machine *sm = sta->eapol_sm;
2317
2318 identity = eap_get_identity(sm->eap, &identity_len);
2319 if (identity &&
2320 ((identity_len == WSC_ID_ENROLLEE_LEN &&
2321 os_memcmp(identity, WSC_ID_ENROLLEE,
2322 WSC_ID_ENROLLEE_LEN) == 0) ||
2323 (identity_len == WSC_ID_REGISTRAR_LEN &&
2324 os_memcmp(identity, WSC_ID_REGISTRAR,
2325 WSC_ID_REGISTRAR_LEN) == 0))) {
2326 wpa_printf(MSG_DEBUG,
2327 "WPS: WLAN_STA_MAYBE_WPS -> WLAN_STA_WPS");
2328 sta->flags |= WLAN_STA_WPS;
2329 }
2330 }
2331 #endif /* CONFIG_WPS */
2332
2333 ieee802_1x_send(ctx, sta_ctx, type, data, datalen);
2334 }
2335
2336
ieee802_1x_aaa_send(void * ctx,void * sta_ctx,const u8 * data,size_t datalen)2337 static void ieee802_1x_aaa_send(void *ctx, void *sta_ctx,
2338 const u8 *data, size_t datalen)
2339 {
2340 #ifndef CONFIG_NO_RADIUS
2341 struct hostapd_data *hapd = ctx;
2342 struct sta_info *sta = sta_ctx;
2343
2344 ieee802_1x_encapsulate_radius(hapd, sta, data, datalen);
2345 #endif /* CONFIG_NO_RADIUS */
2346 }
2347
2348
_ieee802_1x_finished(void * ctx,void * sta_ctx,int success,int preauth,int remediation,bool logoff)2349 static bool _ieee802_1x_finished(void *ctx, void *sta_ctx, int success,
2350 int preauth, int remediation, bool logoff)
2351 {
2352 struct hostapd_data *hapd = ctx;
2353 struct sta_info *sta = sta_ctx;
2354
2355 if (preauth) {
2356 rsn_preauth_finished(hapd, sta, success);
2357 return false;
2358 }
2359
2360 return ieee802_1x_finished(hapd, sta, success, remediation, logoff);
2361 }
2362
2363
ieee802_1x_get_eap_user(void * ctx,const u8 * identity,size_t identity_len,int phase2,struct eap_user * user)2364 static int ieee802_1x_get_eap_user(void *ctx, const u8 *identity,
2365 size_t identity_len, int phase2,
2366 struct eap_user *user)
2367 {
2368 struct hostapd_data *hapd = ctx;
2369 const struct hostapd_eap_user *eap_user;
2370 int i;
2371 int rv = -1;
2372
2373 eap_user = hostapd_get_eap_user(hapd, identity, identity_len, phase2);
2374 if (!eap_user)
2375 goto out;
2376
2377 os_memset(user, 0, sizeof(*user));
2378 user->phase2 = phase2;
2379 for (i = 0; i < EAP_MAX_METHODS; i++) {
2380 user->methods[i].vendor = eap_user->methods[i].vendor;
2381 user->methods[i].method = eap_user->methods[i].method;
2382 }
2383
2384 if (eap_user->password) {
2385 user->password = os_memdup(eap_user->password,
2386 eap_user->password_len);
2387 if (!user->password)
2388 goto out;
2389 user->password_len = eap_user->password_len;
2390 user->password_hash = eap_user->password_hash;
2391 if (eap_user->salt && eap_user->salt_len) {
2392 user->salt = os_memdup(eap_user->salt,
2393 eap_user->salt_len);
2394 if (!user->salt)
2395 goto out;
2396 user->salt_len = eap_user->salt_len;
2397 }
2398 }
2399 user->force_version = eap_user->force_version;
2400 user->macacl = eap_user->macacl;
2401 user->ttls_auth = eap_user->ttls_auth;
2402 user->remediation = eap_user->remediation;
2403 rv = 0;
2404
2405 out:
2406 if (rv)
2407 wpa_printf(MSG_DEBUG, "%s: Failed to find user", __func__);
2408
2409 return rv;
2410 }
2411
2412
ieee802_1x_sta_entry_alive(void * ctx,const u8 * addr)2413 static int ieee802_1x_sta_entry_alive(void *ctx, const u8 *addr)
2414 {
2415 struct hostapd_data *hapd = ctx;
2416 struct sta_info *sta;
2417
2418 sta = ap_get_sta(hapd, addr);
2419 if (!sta || !sta->eapol_sm)
2420 return 0;
2421 return 1;
2422 }
2423
2424
ieee802_1x_logger(void * ctx,const u8 * addr,eapol_logger_level level,const char * txt)2425 static void ieee802_1x_logger(void *ctx, const u8 *addr,
2426 eapol_logger_level level, const char *txt)
2427 {
2428 #ifndef CONFIG_NO_HOSTAPD_LOGGER
2429 struct hostapd_data *hapd = ctx;
2430 int hlevel;
2431
2432 switch (level) {
2433 case EAPOL_LOGGER_WARNING:
2434 hlevel = HOSTAPD_LEVEL_WARNING;
2435 break;
2436 case EAPOL_LOGGER_INFO:
2437 hlevel = HOSTAPD_LEVEL_INFO;
2438 break;
2439 case EAPOL_LOGGER_DEBUG:
2440 default:
2441 hlevel = HOSTAPD_LEVEL_DEBUG;
2442 break;
2443 }
2444
2445 hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE8021X, hlevel, "%s",
2446 txt);
2447 #endif /* CONFIG_NO_HOSTAPD_LOGGER */
2448 }
2449
2450
ieee802_1x_set_port_authorized(void * ctx,void * sta_ctx,int authorized)2451 static void ieee802_1x_set_port_authorized(void *ctx, void *sta_ctx,
2452 int authorized)
2453 {
2454 struct hostapd_data *hapd = ctx;
2455 struct sta_info *sta = sta_ctx;
2456
2457 ieee802_1x_set_sta_authorized(hapd, sta, authorized);
2458 }
2459
2460
_ieee802_1x_abort_auth(void * ctx,void * sta_ctx)2461 static void _ieee802_1x_abort_auth(void *ctx, void *sta_ctx)
2462 {
2463 struct hostapd_data *hapd = ctx;
2464 struct sta_info *sta = sta_ctx;
2465
2466 ieee802_1x_abort_auth(hapd, sta);
2467 }
2468
2469
2470 #ifdef CONFIG_WEP
_ieee802_1x_tx_key(void * ctx,void * sta_ctx)2471 static void _ieee802_1x_tx_key(void *ctx, void *sta_ctx)
2472 {
2473 #ifndef CONFIG_FIPS
2474 #ifndef CONFIG_NO_RC4
2475 struct hostapd_data *hapd = ctx;
2476 struct sta_info *sta = sta_ctx;
2477
2478 ieee802_1x_tx_key(hapd, sta);
2479 #endif /* CONFIG_NO_RC4 */
2480 #endif /* CONFIG_FIPS */
2481 }
2482 #endif /* CONFIG_WEP */
2483
2484
ieee802_1x_eapol_event(void * ctx,void * sta_ctx,enum eapol_event type)2485 static void ieee802_1x_eapol_event(void *ctx, void *sta_ctx,
2486 enum eapol_event type)
2487 {
2488 /* struct hostapd_data *hapd = ctx; */
2489 struct sta_info *sta = sta_ctx;
2490
2491 switch (type) {
2492 case EAPOL_AUTH_SM_CHANGE:
2493 wpa_auth_sm_notify(sta->wpa_sm);
2494 break;
2495 case EAPOL_AUTH_REAUTHENTICATE:
2496 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
2497 break;
2498 }
2499 }
2500
2501
2502 #ifdef CONFIG_ERP
2503
2504 static struct eap_server_erp_key *
ieee802_1x_erp_get_key(void * ctx,const char * keyname)2505 ieee802_1x_erp_get_key(void *ctx, const char *keyname)
2506 {
2507 struct hostapd_data *hapd = ctx;
2508 struct eap_server_erp_key *erp;
2509
2510 dl_list_for_each(erp, &hapd->erp_keys, struct eap_server_erp_key,
2511 list) {
2512 if (os_strcmp(erp->keyname_nai, keyname) == 0)
2513 return erp;
2514 }
2515
2516 return NULL;
2517 }
2518
2519
ieee802_1x_erp_add_key(void * ctx,struct eap_server_erp_key * erp)2520 static int ieee802_1x_erp_add_key(void *ctx, struct eap_server_erp_key *erp)
2521 {
2522 struct hostapd_data *hapd = ctx;
2523
2524 dl_list_add(&hapd->erp_keys, &erp->list);
2525 return 0;
2526 }
2527
2528 #endif /* CONFIG_ERP */
2529
2530
ieee802_1x_init(struct hostapd_data * hapd)2531 int ieee802_1x_init(struct hostapd_data *hapd)
2532 {
2533 struct eapol_auth_config conf;
2534 struct eapol_auth_cb cb;
2535
2536 #ifdef CONFIG_IEEE80211BE
2537 if (!hostapd_mld_is_first_bss(hapd)) {
2538 struct hostapd_data *first;
2539
2540 first = hostapd_mld_get_first_bss(hapd);
2541 if (!first)
2542 return -1;
2543
2544 if (!first->eapol_auth) {
2545 wpa_printf(MSG_DEBUG,
2546 "MLD: First BSS IEEE 802.1X state machine does not exist. Init on its behalf");
2547
2548 if (ieee802_1x_init(first))
2549 return -1;
2550 }
2551
2552 wpa_printf(MSG_DEBUG,
2553 "MLD: Using IEEE 802.1X state machine of the first BSS");
2554
2555 hapd->eapol_auth = first->eapol_auth;
2556 return 0;
2557 }
2558 #endif /* CONFIG_IEEE80211BE */
2559
2560 dl_list_init(&hapd->erp_keys);
2561
2562 os_memset(&conf, 0, sizeof(conf));
2563 conf.eap_cfg = hapd->eap_cfg;
2564 conf.ctx = hapd;
2565 conf.eap_reauth_period = hapd->conf->eap_reauth_period;
2566 conf.wpa = hapd->conf->wpa;
2567 #ifdef CONFIG_WEP
2568 conf.individual_wep_key_len = hapd->conf->individual_wep_key_len;
2569 #endif /* CONFIG_WEP */
2570 conf.eap_req_id_text = hapd->conf->eap_req_id_text;
2571 conf.eap_req_id_text_len = hapd->conf->eap_req_id_text_len;
2572 conf.erp_send_reauth_start = hapd->conf->erp_send_reauth_start;
2573 conf.erp_domain = hapd->conf->erp_domain;
2574 #ifdef CONFIG_TESTING_OPTIONS
2575 conf.eap_skip_prot_success = hapd->conf->eap_skip_prot_success;
2576 #endif /* CONFIG_TESTING_OPTIONS */
2577
2578 os_memset(&cb, 0, sizeof(cb));
2579 cb.eapol_send = ieee802_1x_eapol_send;
2580 cb.aaa_send = ieee802_1x_aaa_send;
2581 cb.finished = _ieee802_1x_finished;
2582 cb.get_eap_user = ieee802_1x_get_eap_user;
2583 cb.sta_entry_alive = ieee802_1x_sta_entry_alive;
2584 cb.logger = ieee802_1x_logger;
2585 cb.set_port_authorized = ieee802_1x_set_port_authorized;
2586 cb.abort_auth = _ieee802_1x_abort_auth;
2587 #ifdef CONFIG_WEP
2588 cb.tx_key = _ieee802_1x_tx_key;
2589 #endif /* CONFIG_WEP */
2590 cb.eapol_event = ieee802_1x_eapol_event;
2591 #ifdef CONFIG_ERP
2592 cb.erp_get_key = ieee802_1x_erp_get_key;
2593 cb.erp_add_key = ieee802_1x_erp_add_key;
2594 #endif /* CONFIG_ERP */
2595
2596 hapd->eapol_auth = eapol_auth_init(&conf, &cb);
2597 if (!hapd->eapol_auth)
2598 return -1;
2599
2600 if ((hapd->conf->ieee802_1x || hapd->conf->wpa) &&
2601 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 1))
2602 return -1;
2603
2604 #ifndef CONFIG_NO_RADIUS
2605 if (radius_client_register(hapd->radius, RADIUS_AUTH,
2606 ieee802_1x_receive_auth, hapd))
2607 return -1;
2608 #endif /* CONFIG_NO_RADIUS */
2609
2610 #ifdef CONFIG_WEP
2611 if (hapd->conf->default_wep_key_len) {
2612 int i;
2613
2614 for (i = 0; i < 4; i++)
2615 hostapd_drv_set_key(hapd->conf->iface, hapd,
2616 WPA_ALG_NONE, NULL, i, 0, 0, NULL,
2617 0, NULL, 0, KEY_FLAG_GROUP);
2618
2619 ieee802_1x_rekey(hapd, NULL);
2620
2621 if (!hapd->eapol_auth->default_wep_key)
2622 return -1;
2623 }
2624 #endif /* CONFIG_WEP */
2625
2626 return 0;
2627 }
2628
2629
ieee802_1x_erp_flush(struct hostapd_data * hapd)2630 void ieee802_1x_erp_flush(struct hostapd_data *hapd)
2631 {
2632 struct eap_server_erp_key *erp;
2633
2634 while ((erp = dl_list_first(&hapd->erp_keys, struct eap_server_erp_key,
2635 list)) != NULL) {
2636 dl_list_del(&erp->list);
2637 bin_clear_free(erp, sizeof(*erp));
2638 }
2639 }
2640
2641
ieee802_1x_deinit(struct hostapd_data * hapd)2642 void ieee802_1x_deinit(struct hostapd_data *hapd)
2643 {
2644 #ifdef CONFIG_IEEE80211BE
2645 if (!hostapd_mld_is_first_bss(hapd)) {
2646 wpa_printf(MSG_DEBUG,
2647 "MLD: Deinit IEEE 802.1X state machine of a non-first BSS");
2648
2649 hapd->eapol_auth = NULL;
2650 return;
2651 }
2652 #endif /* CONFIG_IEEE80211BE */
2653
2654 #ifdef CONFIG_WEP
2655 eloop_cancel_timeout(ieee802_1x_rekey, hapd, NULL);
2656 #endif /* CONFIG_WEP */
2657
2658 if (hapd->driver && hapd->drv_priv &&
2659 (hapd->conf->ieee802_1x || hapd->conf->wpa))
2660 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0);
2661
2662 eapol_auth_deinit(hapd->eapol_auth);
2663 hapd->eapol_auth = NULL;
2664
2665 ieee802_1x_erp_flush(hapd);
2666 }
2667
2668
ieee802_1x_tx_status(struct hostapd_data * hapd,struct sta_info * sta,const u8 * buf,size_t len,int ack)2669 int ieee802_1x_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
2670 const u8 *buf, size_t len, int ack)
2671 {
2672 struct ieee80211_hdr *hdr;
2673 u8 *pos;
2674 const unsigned char rfc1042_hdr[ETH_ALEN] =
2675 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
2676
2677 if (!sta)
2678 return -1;
2679 if (len < sizeof(*hdr) + sizeof(rfc1042_hdr) + 2)
2680 return 0;
2681
2682 hdr = (struct ieee80211_hdr *) buf;
2683 pos = (u8 *) (hdr + 1);
2684 if (os_memcmp(pos, rfc1042_hdr, sizeof(rfc1042_hdr)) != 0)
2685 return 0;
2686 pos += sizeof(rfc1042_hdr);
2687 if (WPA_GET_BE16(pos) != ETH_P_PAE)
2688 return 0;
2689 pos += 2;
2690
2691 return ieee802_1x_eapol_tx_status(hapd, sta, pos, buf + len - pos,
2692 ack);
2693 }
2694
2695
ieee802_1x_eapol_tx_status(struct hostapd_data * hapd,struct sta_info * sta,const u8 * buf,int len,int ack)2696 int ieee802_1x_eapol_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
2697 const u8 *buf, int len, int ack)
2698 {
2699 const struct ieee802_1x_hdr *xhdr =
2700 (const struct ieee802_1x_hdr *) buf;
2701 const u8 *pos = buf + sizeof(*xhdr);
2702 struct ieee802_1x_eapol_key *key;
2703
2704 if (len < (int) sizeof(*xhdr))
2705 return 0;
2706 wpa_printf(MSG_DEBUG, "IEEE 802.1X: " MACSTR
2707 " TX status - version=%d type=%d length=%d - ack=%d",
2708 MAC2STR(sta->addr), xhdr->version, xhdr->type,
2709 be_to_host16(xhdr->length), ack);
2710
2711 #ifdef CONFIG_WPS
2712 if (xhdr->type == IEEE802_1X_TYPE_EAP_PACKET && ack &&
2713 (sta->flags & WLAN_STA_WPS) &&
2714 ap_sta_pending_delayed_1x_auth_fail_disconnect(hapd, sta)) {
2715 wpa_printf(MSG_DEBUG,
2716 "WPS: Indicate EAP completion on ACK for EAP-Failure");
2717 hostapd_wps_eap_completed(hapd);
2718 }
2719 #endif /* CONFIG_WPS */
2720
2721 if (xhdr->type != IEEE802_1X_TYPE_EAPOL_KEY)
2722 return 0;
2723
2724 if (pos + sizeof(struct wpa_eapol_key) <= buf + len) {
2725 const struct wpa_eapol_key *wpa;
2726
2727 wpa = (const struct wpa_eapol_key *) pos;
2728 if (wpa->type == EAPOL_KEY_TYPE_RSN ||
2729 wpa->type == EAPOL_KEY_TYPE_WPA)
2730 wpa_auth_eapol_key_tx_status(hapd->wpa_auth,
2731 sta->wpa_sm, ack);
2732 }
2733
2734 /* EAPOL EAP-Packet packets are eventually re-sent by either Supplicant
2735 * or Authenticator state machines, but EAPOL-Key packets are not
2736 * retransmitted in case of failure. Try to re-send failed EAPOL-Key
2737 * packets couple of times because otherwise STA keys become
2738 * unsynchronized with AP. */
2739 if (!ack && pos + sizeof(*key) <= buf + len) {
2740 key = (struct ieee802_1x_eapol_key *) pos;
2741 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
2742 HOSTAPD_LEVEL_DEBUG,
2743 "did not Ack EAPOL-Key frame (%scast index=%d)",
2744 key->key_index & BIT(7) ? "uni" : "broad",
2745 key->key_index & ~BIT(7));
2746 /* TODO: re-send EAPOL-Key couple of times (with short delay
2747 * between them?). If all attempt fail, report error and
2748 * deauthenticate STA so that it will get new keys when
2749 * authenticating again (e.g., after returning in range).
2750 * Separate limit/transmit state needed both for unicast and
2751 * broadcast keys(?) */
2752 }
2753 /* TODO: could move unicast key configuration from ieee802_1x_tx_key()
2754 * to here and change the key only if the EAPOL-Key packet was Acked.
2755 */
2756
2757 return 1;
2758 }
2759
2760
ieee802_1x_get_identity(struct eapol_state_machine * sm,size_t * len)2761 u8 * ieee802_1x_get_identity(struct eapol_state_machine *sm, size_t *len)
2762 {
2763 if (!sm || !sm->identity)
2764 return NULL;
2765
2766 *len = sm->identity_len;
2767 return sm->identity;
2768 }
2769
2770
ieee802_1x_get_radius_class(struct eapol_state_machine * sm,size_t * len,int idx)2771 u8 * ieee802_1x_get_radius_class(struct eapol_state_machine *sm, size_t *len,
2772 int idx)
2773 {
2774 if (!sm || !sm->radius_class.attr ||
2775 idx >= (int) sm->radius_class.count)
2776 return NULL;
2777
2778 *len = sm->radius_class.attr[idx].len;
2779 return sm->radius_class.attr[idx].data;
2780 }
2781
2782
ieee802_1x_get_radius_cui(struct eapol_state_machine * sm)2783 struct wpabuf * ieee802_1x_get_radius_cui(struct eapol_state_machine *sm)
2784 {
2785 if (!sm)
2786 return NULL;
2787 return sm->radius_cui;
2788 }
2789
2790
ieee802_1x_get_key(struct eapol_state_machine * sm,size_t * len)2791 const u8 * ieee802_1x_get_key(struct eapol_state_machine *sm, size_t *len)
2792 {
2793 *len = 0;
2794 if (!sm)
2795 return NULL;
2796
2797 *len = sm->eap_if->eapKeyDataLen;
2798 return sm->eap_if->eapKeyData;
2799 }
2800
2801
2802 #ifdef CONFIG_MACSEC
ieee802_1x_get_session_id(struct eapol_state_machine * sm,size_t * len)2803 const u8 * ieee802_1x_get_session_id(struct eapol_state_machine *sm,
2804 size_t *len)
2805 {
2806 *len = 0;
2807 if (!sm || !sm->eap_if)
2808 return NULL;
2809
2810 *len = sm->eap_if->eapSessionIdLen;
2811 return sm->eap_if->eapSessionId;
2812 }
2813 #endif /* CONFIG_MACSEC */
2814
2815
ieee802_1x_notify_port_enabled(struct eapol_state_machine * sm,bool enabled)2816 void ieee802_1x_notify_port_enabled(struct eapol_state_machine *sm,
2817 bool enabled)
2818 {
2819 if (!sm)
2820 return;
2821 sm->eap_if->portEnabled = enabled;
2822 eapol_auth_step(sm);
2823 }
2824
2825
ieee802_1x_notify_port_valid(struct eapol_state_machine * sm,bool valid)2826 void ieee802_1x_notify_port_valid(struct eapol_state_machine *sm, bool valid)
2827 {
2828 if (!sm)
2829 return;
2830 sm->portValid = valid;
2831 eapol_auth_step(sm);
2832 }
2833
2834
ieee802_1x_notify_pre_auth(struct eapol_state_machine * sm,bool pre_auth)2835 void ieee802_1x_notify_pre_auth(struct eapol_state_machine *sm, bool pre_auth)
2836 {
2837 if (!sm)
2838 return;
2839 if (pre_auth)
2840 sm->flags |= EAPOL_SM_PREAUTH;
2841 else
2842 sm->flags &= ~EAPOL_SM_PREAUTH;
2843 }
2844
2845
bool_txt(bool val)2846 static const char * bool_txt(bool val)
2847 {
2848 return val ? "TRUE" : "FALSE";
2849 }
2850
2851
ieee802_1x_get_mib(struct hostapd_data * hapd,char * buf,size_t buflen)2852 int ieee802_1x_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
2853 {
2854 /* TODO */
2855 return 0;
2856 }
2857
2858
ieee802_1x_get_mib_sta(struct hostapd_data * hapd,struct sta_info * sta,char * buf,size_t buflen)2859 int ieee802_1x_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
2860 char *buf, size_t buflen)
2861 {
2862 int len = 0, ret;
2863 struct eapol_state_machine *sm = sta->eapol_sm;
2864 struct os_reltime diff;
2865 const char *name1;
2866 const char *name2;
2867 char *identity_buf = NULL;
2868
2869 if (!sm)
2870 return 0;
2871
2872 ret = os_snprintf(buf + len, buflen - len,
2873 "dot1xPaePortNumber=%d\n"
2874 "dot1xPaePortProtocolVersion=%d\n"
2875 "dot1xPaePortCapabilities=1\n"
2876 "dot1xPaePortInitialize=%d\n"
2877 "dot1xPaePortReauthenticate=FALSE\n",
2878 sta->aid,
2879 EAPOL_VERSION,
2880 sm->initialize);
2881 if (os_snprintf_error(buflen - len, ret))
2882 return len;
2883 len += ret;
2884
2885 /* dot1xAuthConfigTable */
2886 ret = os_snprintf(buf + len, buflen - len,
2887 "dot1xAuthPaeState=%d\n"
2888 "dot1xAuthBackendAuthState=%d\n"
2889 "dot1xAuthAdminControlledDirections=%d\n"
2890 "dot1xAuthOperControlledDirections=%d\n"
2891 "dot1xAuthAuthControlledPortStatus=%d\n"
2892 "dot1xAuthAuthControlledPortControl=%d\n"
2893 "dot1xAuthQuietPeriod=%u\n"
2894 "dot1xAuthServerTimeout=%u\n"
2895 "dot1xAuthReAuthPeriod=%u\n"
2896 "dot1xAuthReAuthEnabled=%s\n"
2897 "dot1xAuthKeyTxEnabled=%s\n",
2898 sm->auth_pae_state + 1,
2899 sm->be_auth_state + 1,
2900 sm->adminControlledDirections,
2901 sm->operControlledDirections,
2902 sm->authPortStatus,
2903 sm->portControl,
2904 sm->quietPeriod,
2905 sm->serverTimeout,
2906 sm->reAuthPeriod,
2907 bool_txt(sm->reAuthEnabled),
2908 bool_txt(sm->keyTxEnabled));
2909 if (os_snprintf_error(buflen - len, ret))
2910 return len;
2911 len += ret;
2912
2913 /* dot1xAuthStatsTable */
2914 ret = os_snprintf(buf + len, buflen - len,
2915 "dot1xAuthEapolFramesRx=%u\n"
2916 "dot1xAuthEapolFramesTx=%u\n"
2917 "dot1xAuthEapolStartFramesRx=%u\n"
2918 "dot1xAuthEapolLogoffFramesRx=%u\n"
2919 "dot1xAuthEapolRespIdFramesRx=%u\n"
2920 "dot1xAuthEapolRespFramesRx=%u\n"
2921 "dot1xAuthEapolReqIdFramesTx=%u\n"
2922 "dot1xAuthEapolReqFramesTx=%u\n"
2923 "dot1xAuthInvalidEapolFramesRx=%u\n"
2924 "dot1xAuthEapLengthErrorFramesRx=%u\n"
2925 "dot1xAuthLastEapolFrameVersion=%u\n"
2926 "dot1xAuthLastEapolFrameSource=" MACSTR "\n",
2927 sm->dot1xAuthEapolFramesRx,
2928 sm->dot1xAuthEapolFramesTx,
2929 sm->dot1xAuthEapolStartFramesRx,
2930 sm->dot1xAuthEapolLogoffFramesRx,
2931 sm->dot1xAuthEapolRespIdFramesRx,
2932 sm->dot1xAuthEapolRespFramesRx,
2933 sm->dot1xAuthEapolReqIdFramesTx,
2934 sm->dot1xAuthEapolReqFramesTx,
2935 sm->dot1xAuthInvalidEapolFramesRx,
2936 sm->dot1xAuthEapLengthErrorFramesRx,
2937 sm->dot1xAuthLastEapolFrameVersion,
2938 MAC2STR(sm->addr));
2939 if (os_snprintf_error(buflen - len, ret))
2940 return len;
2941 len += ret;
2942
2943 /* dot1xAuthDiagTable */
2944 ret = os_snprintf(buf + len, buflen - len,
2945 "dot1xAuthEntersConnecting=%u\n"
2946 "dot1xAuthEapLogoffsWhileConnecting=%u\n"
2947 "dot1xAuthEntersAuthenticating=%u\n"
2948 "dot1xAuthAuthSuccessesWhileAuthenticating=%u\n"
2949 "dot1xAuthAuthTimeoutsWhileAuthenticating=%u\n"
2950 "dot1xAuthAuthFailWhileAuthenticating=%u\n"
2951 "dot1xAuthAuthEapStartsWhileAuthenticating=%u\n"
2952 "dot1xAuthAuthEapLogoffWhileAuthenticating=%u\n"
2953 "dot1xAuthAuthReauthsWhileAuthenticated=%u\n"
2954 "dot1xAuthAuthEapStartsWhileAuthenticated=%u\n"
2955 "dot1xAuthAuthEapLogoffWhileAuthenticated=%u\n"
2956 "dot1xAuthBackendResponses=%u\n"
2957 "dot1xAuthBackendAccessChallenges=%u\n"
2958 "dot1xAuthBackendOtherRequestsToSupplicant=%u\n"
2959 "dot1xAuthBackendAuthSuccesses=%u\n"
2960 "dot1xAuthBackendAuthFails=%u\n",
2961 sm->authEntersConnecting,
2962 sm->authEapLogoffsWhileConnecting,
2963 sm->authEntersAuthenticating,
2964 sm->authAuthSuccessesWhileAuthenticating,
2965 sm->authAuthTimeoutsWhileAuthenticating,
2966 sm->authAuthFailWhileAuthenticating,
2967 sm->authAuthEapStartsWhileAuthenticating,
2968 sm->authAuthEapLogoffWhileAuthenticating,
2969 sm->authAuthReauthsWhileAuthenticated,
2970 sm->authAuthEapStartsWhileAuthenticated,
2971 sm->authAuthEapLogoffWhileAuthenticated,
2972 sm->backendResponses,
2973 sm->backendAccessChallenges,
2974 sm->backendOtherRequestsToSupplicant,
2975 sm->backendAuthSuccesses,
2976 sm->backendAuthFails);
2977 if (os_snprintf_error(buflen - len, ret))
2978 return len;
2979 len += ret;
2980
2981 /* dot1xAuthSessionStatsTable */
2982 os_reltime_age(&sta->acct_session_start, &diff);
2983 if (sm->eap && !sm->identity) {
2984 const u8 *id;
2985 size_t id_len;
2986
2987 id = eap_get_identity(sm->eap, &id_len);
2988 if (id)
2989 identity_buf = dup_binstr(id, id_len);
2990 }
2991 ret = os_snprintf(buf + len, buflen - len,
2992 /* TODO: dot1xAuthSessionOctetsRx */
2993 /* TODO: dot1xAuthSessionOctetsTx */
2994 /* TODO: dot1xAuthSessionFramesRx */
2995 /* TODO: dot1xAuthSessionFramesTx */
2996 "dot1xAuthSessionId=%016llX\n"
2997 "dot1xAuthSessionAuthenticMethod=%d\n"
2998 "dot1xAuthSessionTime=%u\n"
2999 "dot1xAuthSessionTerminateCause=999\n"
3000 "dot1xAuthSessionUserName=%s\n",
3001 (unsigned long long) sta->acct_session_id,
3002 (wpa_key_mgmt_wpa_ieee8021x(
3003 wpa_auth_sta_key_mgmt(sta->wpa_sm))) ?
3004 1 : 2,
3005 (unsigned int) diff.sec,
3006 sm->identity ? (char *) sm->identity :
3007 (identity_buf ? identity_buf : "N/A"));
3008 os_free(identity_buf);
3009 if (os_snprintf_error(buflen - len, ret))
3010 return len;
3011 len += ret;
3012
3013 if (sm->acct_multi_session_id) {
3014 ret = os_snprintf(buf + len, buflen - len,
3015 "authMultiSessionId=%016llX\n",
3016 (unsigned long long)
3017 sm->acct_multi_session_id);
3018 if (os_snprintf_error(buflen - len, ret))
3019 return len;
3020 len += ret;
3021 }
3022
3023 name1 = eap_server_get_name(0, sm->eap_type_authsrv);
3024 name2 = eap_server_get_name(0, sm->eap_type_supp);
3025 ret = os_snprintf(buf + len, buflen - len,
3026 "last_eap_type_as=%d (%s)\n"
3027 "last_eap_type_sta=%d (%s)\n",
3028 sm->eap_type_authsrv, name1,
3029 sm->eap_type_supp, name2);
3030 if (os_snprintf_error(buflen - len, ret))
3031 return len;
3032 len += ret;
3033
3034 return len;
3035 }
3036
3037
3038 #ifdef CONFIG_HS20
ieee802_1x_wnm_notif_send(void * eloop_ctx,void * timeout_ctx)3039 static void ieee802_1x_wnm_notif_send(void *eloop_ctx, void *timeout_ctx)
3040 {
3041 struct hostapd_data *hapd = eloop_ctx;
3042 struct sta_info *sta = timeout_ctx;
3043
3044 if (sta->remediation) {
3045 wpa_printf(MSG_DEBUG, "HS 2.0: Send WNM-Notification to "
3046 MACSTR " to indicate Subscription Remediation",
3047 MAC2STR(sta->addr));
3048 hs20_send_wnm_notification(hapd, sta->addr,
3049 sta->remediation_method,
3050 sta->remediation_url);
3051 os_free(sta->remediation_url);
3052 sta->remediation_url = NULL;
3053 }
3054
3055 if (sta->hs20_deauth_req) {
3056 wpa_printf(MSG_DEBUG, "HS 2.0: Send WNM-Notification to "
3057 MACSTR " to indicate imminent deauthentication",
3058 MAC2STR(sta->addr));
3059 hs20_send_wnm_notification_deauth_req(hapd, sta->addr,
3060 sta->hs20_deauth_req);
3061 }
3062
3063 if (sta->hs20_t_c_filtering) {
3064 wpa_printf(MSG_DEBUG, "HS 2.0: Send WNM-Notification to "
3065 MACSTR " to indicate Terms and Conditions filtering",
3066 MAC2STR(sta->addr));
3067 hs20_send_wnm_notification_t_c(hapd, sta->addr, sta->t_c_url);
3068 os_free(sta->t_c_url);
3069 sta->t_c_url = NULL;
3070 }
3071 }
3072 #endif /* CONFIG_HS20 */
3073
3074
ieee802_1x_finished(struct hostapd_data * hapd,struct sta_info * sta,int success,int remediation,bool logoff)3075 static bool ieee802_1x_finished(struct hostapd_data *hapd,
3076 struct sta_info *sta, int success,
3077 int remediation, bool logoff)
3078 {
3079 const u8 *key;
3080 size_t len;
3081 /* TODO: get PMKLifetime from WPA parameters */
3082 static const int dot11RSNAConfigPMKLifetime = 43200;
3083 unsigned int session_timeout;
3084 struct os_reltime now, remaining;
3085
3086 #ifdef CONFIG_HS20
3087 if (remediation && !sta->remediation) {
3088 sta->remediation = 1;
3089 os_free(sta->remediation_url);
3090 sta->remediation_url =
3091 os_strdup(hapd->conf->subscr_remediation_url);
3092 sta->remediation_method = 1; /* SOAP-XML SPP */
3093 }
3094
3095 if (success && (sta->remediation || sta->hs20_deauth_req ||
3096 sta->hs20_t_c_filtering)) {
3097 wpa_printf(MSG_DEBUG, "HS 2.0: Schedule WNM-Notification to "
3098 MACSTR " in 100 ms", MAC2STR(sta->addr));
3099 eloop_cancel_timeout(ieee802_1x_wnm_notif_send, hapd, sta);
3100 eloop_register_timeout(0, 100000, ieee802_1x_wnm_notif_send,
3101 hapd, sta);
3102 }
3103 #endif /* CONFIG_HS20 */
3104
3105 #ifdef CONFIG_MACSEC
3106 ieee802_1x_notify_create_actor_hapd(hapd, sta);
3107 #endif /* CONFIG_MACSEC */
3108
3109 key = ieee802_1x_get_key(sta->eapol_sm, &len);
3110 if (sta->session_timeout_set) {
3111 os_get_reltime(&now);
3112 os_reltime_sub(&sta->session_timeout, &now, &remaining);
3113 session_timeout = (remaining.sec > 0) ? remaining.sec : 1;
3114 } else {
3115 session_timeout = dot11RSNAConfigPMKLifetime;
3116 }
3117 if (success && key && len >= PMK_LEN && !sta->remediation &&
3118 !sta->hs20_deauth_requested &&
3119 wpa_auth_pmksa_add(sta->wpa_sm, key, len, session_timeout,
3120 sta->eapol_sm) == 0) {
3121 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
3122 HOSTAPD_LEVEL_DEBUG,
3123 "Added PMKSA cache entry (IEEE 802.1X)");
3124 }
3125
3126 if (!success) {
3127 /*
3128 * Many devices require deauthentication after WPS provisioning
3129 * and some may not be be able to do that themselves, so
3130 * disconnect the client here. In addition, this may also
3131 * benefit IEEE 802.1X/EAPOL authentication cases, too since
3132 * the EAPOL PAE state machine would remain in HELD state for
3133 * considerable amount of time and some EAP methods, like
3134 * EAP-FAST with anonymous provisioning, may require another
3135 * EAPOL authentication to be started to complete connection.
3136 */
3137 ap_sta_delayed_1x_auth_fail_disconnect(hapd, sta,
3138 logoff ? 0 : 10);
3139 if (logoff && sta->wpa_sm)
3140 return true;
3141 }
3142
3143 return false;
3144 }
3145