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FILS: Fix PTK rekeying
[thirdparty/hostap.git] / src / ap / ieee802_1x.c
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
11 #include "utils/common.h"
12 #include "utils/eloop.h"
13 #include "crypto/md5.h"
14 #include "crypto/crypto.h"
15 #include "crypto/random.h"
16 #include "common/ieee802_11_defs.h"
17 #include "radius/radius.h"
18 #include "radius/radius_client.h"
19 #include "eap_server/eap.h"
20 #include "eap_common/eap_wsc_common.h"
21 #include "eapol_auth/eapol_auth_sm.h"
22 #include "eapol_auth/eapol_auth_sm_i.h"
23 #include "p2p/p2p.h"
24 #include "hostapd.h"
25 #include "accounting.h"
26 #include "sta_info.h"
27 #include "wpa_auth.h"
28 #include "preauth_auth.h"
29 #include "pmksa_cache_auth.h"
30 #include "ap_config.h"
31 #include "ap_drv_ops.h"
32 #include "wps_hostapd.h"
33 #include "hs20.h"
34 /* FIX: Not really a good thing to require ieee802_11.h here.. (FILS) */
35 #include "ieee802_11.h"
36 #include "ieee802_1x.h"
37
38
39 #ifdef CONFIG_HS20
40 static void ieee802_1x_wnm_notif_send(void *eloop_ctx, void *timeout_ctx);
41 #endif /* CONFIG_HS20 */
42 static void ieee802_1x_finished(struct hostapd_data *hapd,
43 struct sta_info *sta, int success,
44 int remediation);
45
46
47 static void ieee802_1x_send(struct hostapd_data *hapd, struct sta_info *sta,
48 u8 type, const u8 *data, size_t datalen)
49 {
50 u8 *buf;
51 struct ieee802_1x_hdr *xhdr;
52 size_t len;
53 int encrypt = 0;
54
55 len = sizeof(*xhdr) + datalen;
56 buf = os_zalloc(len);
57 if (buf == NULL) {
58 wpa_printf(MSG_ERROR, "malloc() failed for "
59 "ieee802_1x_send(len=%lu)",
60 (unsigned long) len);
61 return;
62 }
63
64 xhdr = (struct ieee802_1x_hdr *) buf;
65 xhdr->version = hapd->conf->eapol_version;
66 xhdr->type = type;
67 xhdr->length = host_to_be16(datalen);
68
69 if (datalen > 0 && data != NULL)
70 os_memcpy(xhdr + 1, data, datalen);
71
72 if (wpa_auth_pairwise_set(sta->wpa_sm))
73 encrypt = 1;
74 #ifdef CONFIG_TESTING_OPTIONS
75 if (hapd->ext_eapol_frame_io) {
76 size_t hex_len = 2 * len + 1;
77 char *hex = os_malloc(hex_len);
78
79 if (hex) {
80 wpa_snprintf_hex(hex, hex_len, buf, len);
81 wpa_msg(hapd->msg_ctx, MSG_INFO,
82 "EAPOL-TX " MACSTR " %s",
83 MAC2STR(sta->addr), hex);
84 os_free(hex);
85 }
86 } else
87 #endif /* CONFIG_TESTING_OPTIONS */
88 if (sta->flags & WLAN_STA_PREAUTH) {
89 rsn_preauth_send(hapd, sta, buf, len);
90 } else {
91 hostapd_drv_hapd_send_eapol(
92 hapd, sta->addr, buf, len,
93 encrypt, hostapd_sta_flags_to_drv(sta->flags));
94 }
95
96 os_free(buf);
97 }
98
99
100 void ieee802_1x_set_sta_authorized(struct hostapd_data *hapd,
101 struct sta_info *sta, int authorized)
102 {
103 int res;
104
105 if (sta->flags & WLAN_STA_PREAUTH)
106 return;
107
108 if (authorized) {
109 ap_sta_set_authorized(hapd, sta, 1);
110 res = hostapd_set_authorized(hapd, sta, 1);
111 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
112 HOSTAPD_LEVEL_DEBUG, "authorizing port");
113 } else {
114 ap_sta_set_authorized(hapd, sta, 0);
115 res = hostapd_set_authorized(hapd, sta, 0);
116 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
117 HOSTAPD_LEVEL_DEBUG, "unauthorizing port");
118 }
119
120 if (res && errno != ENOENT) {
121 wpa_printf(MSG_DEBUG, "Could not set station " MACSTR
122 " flags for kernel driver (errno=%d).",
123 MAC2STR(sta->addr), errno);
124 }
125
126 if (authorized) {
127 os_get_reltime(&sta->connected_time);
128 accounting_sta_start(hapd, sta);
129 }
130 }
131
132
133 #ifndef CONFIG_FIPS
134 #ifndef CONFIG_NO_RC4
135
136 static void ieee802_1x_tx_key_one(struct hostapd_data *hapd,
137 struct sta_info *sta,
138 int idx, int broadcast,
139 u8 *key_data, size_t key_len)
140 {
141 u8 *buf, *ekey;
142 struct ieee802_1x_hdr *hdr;
143 struct ieee802_1x_eapol_key *key;
144 size_t len, ekey_len;
145 struct eapol_state_machine *sm = sta->eapol_sm;
146
147 if (sm == NULL)
148 return;
149
150 len = sizeof(*key) + key_len;
151 buf = os_zalloc(sizeof(*hdr) + len);
152 if (buf == NULL)
153 return;
154
155 hdr = (struct ieee802_1x_hdr *) buf;
156 key = (struct ieee802_1x_eapol_key *) (hdr + 1);
157 key->type = EAPOL_KEY_TYPE_RC4;
158 WPA_PUT_BE16(key->key_length, key_len);
159 wpa_get_ntp_timestamp(key->replay_counter);
160
161 if (random_get_bytes(key->key_iv, sizeof(key->key_iv))) {
162 wpa_printf(MSG_ERROR, "Could not get random numbers");
163 os_free(buf);
164 return;
165 }
166
167 key->key_index = idx | (broadcast ? 0 : BIT(7));
168 if (hapd->conf->eapol_key_index_workaround) {
169 /* According to some information, WinXP Supplicant seems to
170 * interpret bit7 as an indication whether the key is to be
171 * activated, so make it possible to enable workaround that
172 * sets this bit for all keys. */
173 key->key_index |= BIT(7);
174 }
175
176 /* Key is encrypted using "Key-IV + MSK[0..31]" as the RC4-key and
177 * MSK[32..63] is used to sign the message. */
178 if (sm->eap_if->eapKeyData == NULL || sm->eap_if->eapKeyDataLen < 64) {
179 wpa_printf(MSG_ERROR, "No eapKeyData available for encrypting "
180 "and signing EAPOL-Key");
181 os_free(buf);
182 return;
183 }
184 os_memcpy((u8 *) (key + 1), key_data, key_len);
185 ekey_len = sizeof(key->key_iv) + 32;
186 ekey = os_malloc(ekey_len);
187 if (ekey == NULL) {
188 wpa_printf(MSG_ERROR, "Could not encrypt key");
189 os_free(buf);
190 return;
191 }
192 os_memcpy(ekey, key->key_iv, sizeof(key->key_iv));
193 os_memcpy(ekey + sizeof(key->key_iv), sm->eap_if->eapKeyData, 32);
194 rc4_skip(ekey, ekey_len, 0, (u8 *) (key + 1), key_len);
195 os_free(ekey);
196
197 /* This header is needed here for HMAC-MD5, but it will be regenerated
198 * in ieee802_1x_send() */
199 hdr->version = hapd->conf->eapol_version;
200 hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
201 hdr->length = host_to_be16(len);
202 hmac_md5(sm->eap_if->eapKeyData + 32, 32, buf, sizeof(*hdr) + len,
203 key->key_signature);
204
205 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key to " MACSTR
206 " (%s index=%d)", MAC2STR(sm->addr),
207 broadcast ? "broadcast" : "unicast", idx);
208 ieee802_1x_send(hapd, sta, IEEE802_1X_TYPE_EAPOL_KEY, (u8 *) key, len);
209 if (sta->eapol_sm)
210 sta->eapol_sm->dot1xAuthEapolFramesTx++;
211 os_free(buf);
212 }
213
214
215 static void ieee802_1x_tx_key(struct hostapd_data *hapd, struct sta_info *sta)
216 {
217 struct eapol_authenticator *eapol = hapd->eapol_auth;
218 struct eapol_state_machine *sm = sta->eapol_sm;
219
220 if (sm == NULL || !sm->eap_if->eapKeyData)
221 return;
222
223 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key(s) to " MACSTR,
224 MAC2STR(sta->addr));
225
226 #ifndef CONFIG_NO_VLAN
227 if (sta->vlan_id > 0) {
228 wpa_printf(MSG_ERROR, "Using WEP with vlans is not supported.");
229 return;
230 }
231 #endif /* CONFIG_NO_VLAN */
232
233 if (eapol->default_wep_key) {
234 ieee802_1x_tx_key_one(hapd, sta, eapol->default_wep_key_idx, 1,
235 eapol->default_wep_key,
236 hapd->conf->default_wep_key_len);
237 }
238
239 if (hapd->conf->individual_wep_key_len > 0) {
240 u8 *ikey;
241 ikey = os_malloc(hapd->conf->individual_wep_key_len);
242 if (ikey == NULL ||
243 random_get_bytes(ikey, hapd->conf->individual_wep_key_len))
244 {
245 wpa_printf(MSG_ERROR, "Could not generate random "
246 "individual WEP key.");
247 os_free(ikey);
248 return;
249 }
250
251 wpa_hexdump_key(MSG_DEBUG, "Individual WEP key",
252 ikey, hapd->conf->individual_wep_key_len);
253
254 ieee802_1x_tx_key_one(hapd, sta, 0, 0, ikey,
255 hapd->conf->individual_wep_key_len);
256
257 /* TODO: set encryption in TX callback, i.e., only after STA
258 * has ACKed EAPOL-Key frame */
259 if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
260 sta->addr, 0, 1, NULL, 0, ikey,
261 hapd->conf->individual_wep_key_len)) {
262 wpa_printf(MSG_ERROR, "Could not set individual WEP "
263 "encryption.");
264 }
265
266 os_free(ikey);
267 }
268 }
269
270 #endif /* CONFIG_NO_RC4 */
271 #endif /* CONFIG_FIPS */
272
273
274 const char *radius_mode_txt(struct hostapd_data *hapd)
275 {
276 switch (hapd->iface->conf->hw_mode) {
277 case HOSTAPD_MODE_IEEE80211AD:
278 return "802.11ad";
279 case HOSTAPD_MODE_IEEE80211A:
280 return "802.11a";
281 case HOSTAPD_MODE_IEEE80211G:
282 return "802.11g";
283 case HOSTAPD_MODE_IEEE80211B:
284 default:
285 return "802.11b";
286 }
287 }
288
289
290 int radius_sta_rate(struct hostapd_data *hapd, struct sta_info *sta)
291 {
292 int i;
293 u8 rate = 0;
294
295 for (i = 0; i < sta->supported_rates_len; i++)
296 if ((sta->supported_rates[i] & 0x7f) > rate)
297 rate = sta->supported_rates[i] & 0x7f;
298
299 return rate;
300 }
301
302
303 #ifndef CONFIG_NO_RADIUS
304 static void ieee802_1x_learn_identity(struct hostapd_data *hapd,
305 struct eapol_state_machine *sm,
306 const u8 *eap, size_t len)
307 {
308 const u8 *identity;
309 size_t identity_len;
310 const struct eap_hdr *hdr = (const struct eap_hdr *) eap;
311
312 if (len <= sizeof(struct eap_hdr) ||
313 (hdr->code == EAP_CODE_RESPONSE &&
314 eap[sizeof(struct eap_hdr)] != EAP_TYPE_IDENTITY) ||
315 (hdr->code == EAP_CODE_INITIATE &&
316 eap[sizeof(struct eap_hdr)] != EAP_ERP_TYPE_REAUTH) ||
317 (hdr->code != EAP_CODE_RESPONSE &&
318 hdr->code != EAP_CODE_INITIATE))
319 return;
320
321 eap_erp_update_identity(sm->eap, eap, len);
322 identity = eap_get_identity(sm->eap, &identity_len);
323 if (identity == NULL)
324 return;
325
326 /* Save station identity for future RADIUS packets */
327 os_free(sm->identity);
328 sm->identity = (u8 *) dup_binstr(identity, identity_len);
329 if (sm->identity == NULL) {
330 sm->identity_len = 0;
331 return;
332 }
333
334 sm->identity_len = identity_len;
335 hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
336 HOSTAPD_LEVEL_DEBUG, "STA identity '%s'", sm->identity);
337 sm->dot1xAuthEapolRespIdFramesRx++;
338 }
339
340
341 static int add_common_radius_sta_attr_rsn(struct hostapd_data *hapd,
342 struct hostapd_radius_attr *req_attr,
343 struct sta_info *sta,
344 struct radius_msg *msg)
345 {
346 u32 suite;
347 int ver, val;
348
349 ver = wpa_auth_sta_wpa_version(sta->wpa_sm);
350 val = wpa_auth_get_pairwise(sta->wpa_sm);
351 suite = wpa_cipher_to_suite(ver, val);
352 if (val != -1 &&
353 !hostapd_config_get_radius_attr(req_attr,
354 RADIUS_ATTR_WLAN_PAIRWISE_CIPHER) &&
355 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_WLAN_PAIRWISE_CIPHER,
356 suite)) {
357 wpa_printf(MSG_ERROR, "Could not add WLAN-Pairwise-Cipher");
358 return -1;
359 }
360
361 suite = wpa_cipher_to_suite(((hapd->conf->wpa & 0x2) ||
362 hapd->conf->osen) ?
363 WPA_PROTO_RSN : WPA_PROTO_WPA,
364 hapd->conf->wpa_group);
365 if (!hostapd_config_get_radius_attr(req_attr,
366 RADIUS_ATTR_WLAN_GROUP_CIPHER) &&
367 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_WLAN_GROUP_CIPHER,
368 suite)) {
369 wpa_printf(MSG_ERROR, "Could not add WLAN-Group-Cipher");
370 return -1;
371 }
372
373 val = wpa_auth_sta_key_mgmt(sta->wpa_sm);
374 suite = wpa_akm_to_suite(val);
375 if (val != -1 &&
376 !hostapd_config_get_radius_attr(req_attr,
377 RADIUS_ATTR_WLAN_AKM_SUITE) &&
378 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_WLAN_AKM_SUITE,
379 suite)) {
380 wpa_printf(MSG_ERROR, "Could not add WLAN-AKM-Suite");
381 return -1;
382 }
383
384 #ifdef CONFIG_IEEE80211W
385 if (hapd->conf->ieee80211w != NO_MGMT_FRAME_PROTECTION) {
386 suite = wpa_cipher_to_suite(WPA_PROTO_RSN,
387 hapd->conf->group_mgmt_cipher);
388 if (!hostapd_config_get_radius_attr(
389 req_attr, RADIUS_ATTR_WLAN_GROUP_MGMT_CIPHER) &&
390 !radius_msg_add_attr_int32(
391 msg, RADIUS_ATTR_WLAN_GROUP_MGMT_CIPHER, suite)) {
392 wpa_printf(MSG_ERROR,
393 "Could not add WLAN-Group-Mgmt-Cipher");
394 return -1;
395 }
396 }
397 #endif /* CONFIG_IEEE80211W */
398
399 return 0;
400 }
401
402
403 static int add_common_radius_sta_attr(struct hostapd_data *hapd,
404 struct hostapd_radius_attr *req_attr,
405 struct sta_info *sta,
406 struct radius_msg *msg)
407 {
408 char buf[128];
409
410 if (!hostapd_config_get_radius_attr(req_attr,
411 RADIUS_ATTR_SERVICE_TYPE) &&
412 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_SERVICE_TYPE,
413 RADIUS_SERVICE_TYPE_FRAMED)) {
414 wpa_printf(MSG_ERROR, "Could not add Service-Type");
415 return -1;
416 }
417
418 if (!hostapd_config_get_radius_attr(req_attr,
419 RADIUS_ATTR_NAS_PORT) &&
420 sta->aid > 0 &&
421 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT, sta->aid)) {
422 wpa_printf(MSG_ERROR, "Could not add NAS-Port");
423 return -1;
424 }
425
426 os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
427 MAC2STR(sta->addr));
428 buf[sizeof(buf) - 1] = '\0';
429 if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID,
430 (u8 *) buf, os_strlen(buf))) {
431 wpa_printf(MSG_ERROR, "Could not add Calling-Station-Id");
432 return -1;
433 }
434
435 if (sta->flags & WLAN_STA_PREAUTH) {
436 os_strlcpy(buf, "IEEE 802.11i Pre-Authentication",
437 sizeof(buf));
438 } else {
439 os_snprintf(buf, sizeof(buf), "CONNECT %d%sMbps %s",
440 radius_sta_rate(hapd, sta) / 2,
441 (radius_sta_rate(hapd, sta) & 1) ? ".5" : "",
442 radius_mode_txt(hapd));
443 buf[sizeof(buf) - 1] = '\0';
444 }
445 if (!hostapd_config_get_radius_attr(req_attr,
446 RADIUS_ATTR_CONNECT_INFO) &&
447 !radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO,
448 (u8 *) buf, os_strlen(buf))) {
449 wpa_printf(MSG_ERROR, "Could not add Connect-Info");
450 return -1;
451 }
452
453 if (sta->acct_session_id) {
454 os_snprintf(buf, sizeof(buf), "%016llX",
455 (unsigned long long) sta->acct_session_id);
456 if (!radius_msg_add_attr(msg, RADIUS_ATTR_ACCT_SESSION_ID,
457 (u8 *) buf, os_strlen(buf))) {
458 wpa_printf(MSG_ERROR, "Could not add Acct-Session-Id");
459 return -1;
460 }
461 }
462
463 if ((hapd->conf->wpa & 2) &&
464 !hapd->conf->disable_pmksa_caching &&
465 sta->eapol_sm && sta->eapol_sm->acct_multi_session_id) {
466 os_snprintf(buf, sizeof(buf), "%016llX",
467 (unsigned long long)
468 sta->eapol_sm->acct_multi_session_id);
469 if (!radius_msg_add_attr(
470 msg, RADIUS_ATTR_ACCT_MULTI_SESSION_ID,
471 (u8 *) buf, os_strlen(buf))) {
472 wpa_printf(MSG_INFO,
473 "Could not add Acct-Multi-Session-Id");
474 return -1;
475 }
476 }
477
478 #ifdef CONFIG_IEEE80211R_AP
479 if (hapd->conf->wpa && wpa_key_mgmt_ft(hapd->conf->wpa_key_mgmt) &&
480 sta->wpa_sm &&
481 (wpa_key_mgmt_ft(wpa_auth_sta_key_mgmt(sta->wpa_sm)) ||
482 sta->auth_alg == WLAN_AUTH_FT) &&
483 !hostapd_config_get_radius_attr(req_attr,
484 RADIUS_ATTR_MOBILITY_DOMAIN_ID) &&
485 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_MOBILITY_DOMAIN_ID,
486 WPA_GET_BE16(
487 hapd->conf->mobility_domain))) {
488 wpa_printf(MSG_ERROR, "Could not add Mobility-Domain-Id");
489 return -1;
490 }
491 #endif /* CONFIG_IEEE80211R_AP */
492
493 if ((hapd->conf->wpa || hapd->conf->osen) && sta->wpa_sm &&
494 add_common_radius_sta_attr_rsn(hapd, req_attr, sta, msg) < 0)
495 return -1;
496
497 return 0;
498 }
499
500
501 int add_common_radius_attr(struct hostapd_data *hapd,
502 struct hostapd_radius_attr *req_attr,
503 struct sta_info *sta,
504 struct radius_msg *msg)
505 {
506 char buf[128];
507 struct hostapd_radius_attr *attr;
508 int len;
509
510 if (!hostapd_config_get_radius_attr(req_attr,
511 RADIUS_ATTR_NAS_IP_ADDRESS) &&
512 hapd->conf->own_ip_addr.af == AF_INET &&
513 !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS,
514 (u8 *) &hapd->conf->own_ip_addr.u.v4, 4)) {
515 wpa_printf(MSG_ERROR, "Could not add NAS-IP-Address");
516 return -1;
517 }
518
519 #ifdef CONFIG_IPV6
520 if (!hostapd_config_get_radius_attr(req_attr,
521 RADIUS_ATTR_NAS_IPV6_ADDRESS) &&
522 hapd->conf->own_ip_addr.af == AF_INET6 &&
523 !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IPV6_ADDRESS,
524 (u8 *) &hapd->conf->own_ip_addr.u.v6, 16)) {
525 wpa_printf(MSG_ERROR, "Could not add NAS-IPv6-Address");
526 return -1;
527 }
528 #endif /* CONFIG_IPV6 */
529
530 if (!hostapd_config_get_radius_attr(req_attr,
531 RADIUS_ATTR_NAS_IDENTIFIER) &&
532 hapd->conf->nas_identifier &&
533 !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IDENTIFIER,
534 (u8 *) hapd->conf->nas_identifier,
535 os_strlen(hapd->conf->nas_identifier))) {
536 wpa_printf(MSG_ERROR, "Could not add NAS-Identifier");
537 return -1;
538 }
539
540 len = os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT ":",
541 MAC2STR(hapd->own_addr));
542 os_memcpy(&buf[len], hapd->conf->ssid.ssid,
543 hapd->conf->ssid.ssid_len);
544 len += hapd->conf->ssid.ssid_len;
545 if (!hostapd_config_get_radius_attr(req_attr,
546 RADIUS_ATTR_CALLED_STATION_ID) &&
547 !radius_msg_add_attr(msg, RADIUS_ATTR_CALLED_STATION_ID,
548 (u8 *) buf, len)) {
549 wpa_printf(MSG_ERROR, "Could not add Called-Station-Id");
550 return -1;
551 }
552
553 if (!hostapd_config_get_radius_attr(req_attr,
554 RADIUS_ATTR_NAS_PORT_TYPE) &&
555 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT_TYPE,
556 RADIUS_NAS_PORT_TYPE_IEEE_802_11)) {
557 wpa_printf(MSG_ERROR, "Could not add NAS-Port-Type");
558 return -1;
559 }
560
561 #ifdef CONFIG_INTERWORKING
562 if (hapd->conf->interworking &&
563 !is_zero_ether_addr(hapd->conf->hessid)) {
564 os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
565 MAC2STR(hapd->conf->hessid));
566 buf[sizeof(buf) - 1] = '\0';
567 if (!hostapd_config_get_radius_attr(req_attr,
568 RADIUS_ATTR_WLAN_HESSID) &&
569 !radius_msg_add_attr(msg, RADIUS_ATTR_WLAN_HESSID,
570 (u8 *) buf, os_strlen(buf))) {
571 wpa_printf(MSG_ERROR, "Could not add WLAN-HESSID");
572 return -1;
573 }
574 }
575 #endif /* CONFIG_INTERWORKING */
576
577 if (sta && add_common_radius_sta_attr(hapd, req_attr, sta, msg) < 0)
578 return -1;
579
580 for (attr = req_attr; attr; attr = attr->next) {
581 if (!radius_msg_add_attr(msg, attr->type,
582 wpabuf_head(attr->val),
583 wpabuf_len(attr->val))) {
584 wpa_printf(MSG_ERROR, "Could not add RADIUS "
585 "attribute");
586 return -1;
587 }
588 }
589
590 return 0;
591 }
592
593
594 void ieee802_1x_encapsulate_radius(struct hostapd_data *hapd,
595 struct sta_info *sta,
596 const u8 *eap, size_t len)
597 {
598 struct radius_msg *msg;
599 struct eapol_state_machine *sm = sta->eapol_sm;
600
601 if (sm == NULL)
602 return;
603
604 ieee802_1x_learn_identity(hapd, sm, eap, len);
605
606 wpa_printf(MSG_DEBUG, "Encapsulating EAP message into a RADIUS "
607 "packet");
608
609 sm->radius_identifier = radius_client_get_id(hapd->radius);
610 msg = radius_msg_new(RADIUS_CODE_ACCESS_REQUEST,
611 sm->radius_identifier);
612 if (msg == NULL) {
613 wpa_printf(MSG_INFO, "Could not create new RADIUS packet");
614 return;
615 }
616
617 if (radius_msg_make_authenticator(msg) < 0) {
618 wpa_printf(MSG_INFO, "Could not make Request Authenticator");
619 goto fail;
620 }
621
622 if (sm->identity &&
623 !radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME,
624 sm->identity, sm->identity_len)) {
625 wpa_printf(MSG_INFO, "Could not add User-Name");
626 goto fail;
627 }
628
629 if (add_common_radius_attr(hapd, hapd->conf->radius_auth_req_attr, sta,
630 msg) < 0)
631 goto fail;
632
633 /* TODO: should probably check MTU from driver config; 2304 is max for
634 * IEEE 802.11, but use 1400 to avoid problems with too large packets
635 */
636 if (!hostapd_config_get_radius_attr(hapd->conf->radius_auth_req_attr,
637 RADIUS_ATTR_FRAMED_MTU) &&
638 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_FRAMED_MTU, 1400)) {
639 wpa_printf(MSG_INFO, "Could not add Framed-MTU");
640 goto fail;
641 }
642
643 if (!radius_msg_add_eap(msg, eap, len)) {
644 wpa_printf(MSG_INFO, "Could not add EAP-Message");
645 goto fail;
646 }
647
648 /* State attribute must be copied if and only if this packet is
649 * Access-Request reply to the previous Access-Challenge */
650 if (sm->last_recv_radius &&
651 radius_msg_get_hdr(sm->last_recv_radius)->code ==
652 RADIUS_CODE_ACCESS_CHALLENGE) {
653 int res = radius_msg_copy_attr(msg, sm->last_recv_radius,
654 RADIUS_ATTR_STATE);
655 if (res < 0) {
656 wpa_printf(MSG_INFO, "Could not copy State attribute from previous Access-Challenge");
657 goto fail;
658 }
659 if (res > 0) {
660 wpa_printf(MSG_DEBUG, "Copied RADIUS State Attribute");
661 }
662 }
663
664 if (hapd->conf->radius_request_cui) {
665 const u8 *cui;
666 size_t cui_len;
667 /* Add previously learned CUI or nul CUI to request CUI */
668 if (sm->radius_cui) {
669 cui = wpabuf_head(sm->radius_cui);
670 cui_len = wpabuf_len(sm->radius_cui);
671 } else {
672 cui = (const u8 *) "\0";
673 cui_len = 1;
674 }
675 if (!radius_msg_add_attr(msg,
676 RADIUS_ATTR_CHARGEABLE_USER_IDENTITY,
677 cui, cui_len)) {
678 wpa_printf(MSG_ERROR, "Could not add CUI");
679 goto fail;
680 }
681 }
682
683 #ifdef CONFIG_HS20
684 if (hapd->conf->hs20) {
685 u8 ver = hapd->conf->hs20_release - 1;
686
687 if (!radius_msg_add_wfa(
688 msg, RADIUS_VENDOR_ATTR_WFA_HS20_AP_VERSION,
689 &ver, 1)) {
690 wpa_printf(MSG_ERROR, "Could not add HS 2.0 AP "
691 "version");
692 goto fail;
693 }
694
695 if (sta->hs20_ie && wpabuf_len(sta->hs20_ie) > 0) {
696 const u8 *pos;
697 u8 buf[3];
698 u16 id;
699 pos = wpabuf_head_u8(sta->hs20_ie);
700 buf[0] = (*pos) >> 4;
701 if (((*pos) & HS20_PPS_MO_ID_PRESENT) &&
702 wpabuf_len(sta->hs20_ie) >= 3)
703 id = WPA_GET_LE16(pos + 1);
704 else
705 id = 0;
706 WPA_PUT_BE16(buf + 1, id);
707 if (!radius_msg_add_wfa(
708 msg,
709 RADIUS_VENDOR_ATTR_WFA_HS20_STA_VERSION,
710 buf, sizeof(buf))) {
711 wpa_printf(MSG_ERROR, "Could not add HS 2.0 "
712 "STA version");
713 goto fail;
714 }
715 }
716
717 if (sta->roaming_consortium &&
718 !radius_msg_add_wfa(
719 msg, RADIUS_VENDOR_ATTR_WFA_HS20_ROAMING_CONSORTIUM,
720 wpabuf_head(sta->roaming_consortium),
721 wpabuf_len(sta->roaming_consortium))) {
722 wpa_printf(MSG_ERROR,
723 "Could not add HS 2.0 Roaming Consortium");
724 goto fail;
725 }
726
727 if (hapd->conf->t_c_filename) {
728 be32 timestamp;
729
730 if (!radius_msg_add_wfa(
731 msg,
732 RADIUS_VENDOR_ATTR_WFA_HS20_T_C_FILENAME,
733 (const u8 *) hapd->conf->t_c_filename,
734 os_strlen(hapd->conf->t_c_filename))) {
735 wpa_printf(MSG_ERROR,
736 "Could not add HS 2.0 T&C Filename");
737 goto fail;
738 }
739
740 timestamp = host_to_be32(hapd->conf->t_c_timestamp);
741 if (!radius_msg_add_wfa(
742 msg,
743 RADIUS_VENDOR_ATTR_WFA_HS20_TIMESTAMP,
744 (const u8 *) &timestamp,
745 sizeof(timestamp))) {
746 wpa_printf(MSG_ERROR,
747 "Could not add HS 2.0 Timestamp");
748 goto fail;
749 }
750 }
751 }
752 #endif /* CONFIG_HS20 */
753
754 if (radius_client_send(hapd->radius, msg, RADIUS_AUTH, sta->addr) < 0)
755 goto fail;
756
757 return;
758
759 fail:
760 radius_msg_free(msg);
761 }
762 #endif /* CONFIG_NO_RADIUS */
763
764
765 static void handle_eap_response(struct hostapd_data *hapd,
766 struct sta_info *sta, struct eap_hdr *eap,
767 size_t len)
768 {
769 u8 type, *data;
770 struct eapol_state_machine *sm = sta->eapol_sm;
771 if (sm == NULL)
772 return;
773
774 data = (u8 *) (eap + 1);
775
776 if (len < sizeof(*eap) + 1) {
777 wpa_printf(MSG_INFO, "handle_eap_response: too short response data");
778 return;
779 }
780
781 sm->eap_type_supp = type = data[0];
782
783 hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
784 HOSTAPD_LEVEL_DEBUG, "received EAP packet (code=%d "
785 "id=%d len=%d) from STA: EAP Response-%s (%d)",
786 eap->code, eap->identifier, be_to_host16(eap->length),
787 eap_server_get_name(0, type), type);
788
789 sm->dot1xAuthEapolRespFramesRx++;
790
791 wpabuf_free(sm->eap_if->eapRespData);
792 sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len);
793 sm->eapolEap = TRUE;
794 }
795
796
797 static void handle_eap_initiate(struct hostapd_data *hapd,
798 struct sta_info *sta, struct eap_hdr *eap,
799 size_t len)
800 {
801 #ifdef CONFIG_ERP
802 u8 type, *data;
803 struct eapol_state_machine *sm = sta->eapol_sm;
804
805 if (sm == NULL)
806 return;
807
808 if (len < sizeof(*eap) + 1) {
809 wpa_printf(MSG_INFO,
810 "handle_eap_initiate: too short response data");
811 return;
812 }
813
814 data = (u8 *) (eap + 1);
815 type = data[0];
816
817 hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
818 HOSTAPD_LEVEL_DEBUG, "received EAP packet (code=%d "
819 "id=%d len=%d) from STA: EAP Initiate type %u",
820 eap->code, eap->identifier, be_to_host16(eap->length),
821 type);
822
823 wpabuf_free(sm->eap_if->eapRespData);
824 sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len);
825 sm->eapolEap = TRUE;
826 #endif /* CONFIG_ERP */
827 }
828
829
830 /* Process incoming EAP packet from Supplicant */
831 static void handle_eap(struct hostapd_data *hapd, struct sta_info *sta,
832 u8 *buf, size_t len)
833 {
834 struct eap_hdr *eap;
835 u16 eap_len;
836
837 if (len < sizeof(*eap)) {
838 wpa_printf(MSG_INFO, " too short EAP packet");
839 return;
840 }
841
842 eap = (struct eap_hdr *) buf;
843
844 eap_len = be_to_host16(eap->length);
845 wpa_printf(MSG_DEBUG, "EAP: code=%d identifier=%d length=%d",
846 eap->code, eap->identifier, eap_len);
847 if (eap_len < sizeof(*eap)) {
848 wpa_printf(MSG_DEBUG, " Invalid EAP length");
849 return;
850 } else if (eap_len > len) {
851 wpa_printf(MSG_DEBUG, " Too short frame to contain this EAP "
852 "packet");
853 return;
854 } else if (eap_len < len) {
855 wpa_printf(MSG_DEBUG, " Ignoring %lu extra bytes after EAP "
856 "packet", (unsigned long) len - eap_len);
857 }
858
859 switch (eap->code) {
860 case EAP_CODE_REQUEST:
861 wpa_printf(MSG_DEBUG, " (request)");
862 return;
863 case EAP_CODE_RESPONSE:
864 wpa_printf(MSG_DEBUG, " (response)");
865 handle_eap_response(hapd, sta, eap, eap_len);
866 break;
867 case EAP_CODE_SUCCESS:
868 wpa_printf(MSG_DEBUG, " (success)");
869 return;
870 case EAP_CODE_FAILURE:
871 wpa_printf(MSG_DEBUG, " (failure)");
872 return;
873 case EAP_CODE_INITIATE:
874 wpa_printf(MSG_DEBUG, " (initiate)");
875 handle_eap_initiate(hapd, sta, eap, eap_len);
876 break;
877 case EAP_CODE_FINISH:
878 wpa_printf(MSG_DEBUG, " (finish)");
879 break;
880 default:
881 wpa_printf(MSG_DEBUG, " (unknown code)");
882 return;
883 }
884 }
885
886
887 struct eapol_state_machine *
888 ieee802_1x_alloc_eapol_sm(struct hostapd_data *hapd, struct sta_info *sta)
889 {
890 int flags = 0;
891 if (sta->flags & WLAN_STA_PREAUTH)
892 flags |= EAPOL_SM_PREAUTH;
893 if (sta->wpa_sm) {
894 flags |= EAPOL_SM_USES_WPA;
895 if (wpa_auth_sta_get_pmksa(sta->wpa_sm))
896 flags |= EAPOL_SM_FROM_PMKSA_CACHE;
897 }
898 return eapol_auth_alloc(hapd->eapol_auth, sta->addr, flags,
899 sta->wps_ie, sta->p2p_ie, sta,
900 sta->identity, sta->radius_cui);
901 }
902
903
904 static void ieee802_1x_save_eapol(struct sta_info *sta, const u8 *buf,
905 size_t len)
906 {
907 if (sta->pending_eapol_rx) {
908 wpabuf_free(sta->pending_eapol_rx->buf);
909 } else {
910 sta->pending_eapol_rx =
911 os_malloc(sizeof(*sta->pending_eapol_rx));
912 if (!sta->pending_eapol_rx)
913 return;
914 }
915
916 sta->pending_eapol_rx->buf = wpabuf_alloc_copy(buf, len);
917 if (!sta->pending_eapol_rx->buf) {
918 os_free(sta->pending_eapol_rx);
919 sta->pending_eapol_rx = NULL;
920 return;
921 }
922
923 os_get_reltime(&sta->pending_eapol_rx->rx_time);
924 }
925
926
927 /**
928 * ieee802_1x_receive - Process the EAPOL frames from the Supplicant
929 * @hapd: hostapd BSS data
930 * @sa: Source address (sender of the EAPOL frame)
931 * @buf: EAPOL frame
932 * @len: Length of buf in octets
933 *
934 * This function is called for each incoming EAPOL frame from the interface
935 */
936 void ieee802_1x_receive(struct hostapd_data *hapd, const u8 *sa, const u8 *buf,
937 size_t len)
938 {
939 struct sta_info *sta;
940 struct ieee802_1x_hdr *hdr;
941 struct ieee802_1x_eapol_key *key;
942 u16 datalen;
943 struct rsn_pmksa_cache_entry *pmksa;
944 int key_mgmt;
945
946 if (!hapd->conf->ieee802_1x && !hapd->conf->wpa && !hapd->conf->osen &&
947 !hapd->conf->wps_state)
948 return;
949
950 wpa_printf(MSG_DEBUG, "IEEE 802.1X: %lu bytes from " MACSTR,
951 (unsigned long) len, MAC2STR(sa));
952 sta = ap_get_sta(hapd, sa);
953 if (!sta || (!(sta->flags & (WLAN_STA_ASSOC | WLAN_STA_PREAUTH)) &&
954 !(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_WIRED))) {
955 wpa_printf(MSG_DEBUG, "IEEE 802.1X data frame from not "
956 "associated/Pre-authenticating STA");
957
958 if (sta && (sta->flags & WLAN_STA_AUTH)) {
959 wpa_printf(MSG_DEBUG, "Saving EAPOL frame from " MACSTR
960 " for later use", MAC2STR(sta->addr));
961 ieee802_1x_save_eapol(sta, buf, len);
962 }
963
964 return;
965 }
966
967 if (len < sizeof(*hdr)) {
968 wpa_printf(MSG_INFO, " too short IEEE 802.1X packet");
969 return;
970 }
971
972 hdr = (struct ieee802_1x_hdr *) buf;
973 datalen = be_to_host16(hdr->length);
974 wpa_printf(MSG_DEBUG, " IEEE 802.1X: version=%d type=%d length=%d",
975 hdr->version, hdr->type, datalen);
976
977 if (len - sizeof(*hdr) < datalen) {
978 wpa_printf(MSG_INFO, " frame too short for this IEEE 802.1X packet");
979 if (sta->eapol_sm)
980 sta->eapol_sm->dot1xAuthEapLengthErrorFramesRx++;
981 return;
982 }
983 if (len - sizeof(*hdr) > datalen) {
984 wpa_printf(MSG_DEBUG, " ignoring %lu extra octets after "
985 "IEEE 802.1X packet",
986 (unsigned long) len - sizeof(*hdr) - datalen);
987 }
988
989 if (sta->eapol_sm) {
990 sta->eapol_sm->dot1xAuthLastEapolFrameVersion = hdr->version;
991 sta->eapol_sm->dot1xAuthEapolFramesRx++;
992 }
993
994 key = (struct ieee802_1x_eapol_key *) (hdr + 1);
995 if (datalen >= sizeof(struct ieee802_1x_eapol_key) &&
996 hdr->type == IEEE802_1X_TYPE_EAPOL_KEY &&
997 (key->type == EAPOL_KEY_TYPE_WPA ||
998 key->type == EAPOL_KEY_TYPE_RSN)) {
999 wpa_receive(hapd->wpa_auth, sta->wpa_sm, (u8 *) hdr,
1000 sizeof(*hdr) + datalen);
1001 return;
1002 }
1003
1004 if (!hapd->conf->ieee802_1x && !hapd->conf->osen &&
1005 !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) {
1006 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore EAPOL message - "
1007 "802.1X not enabled and WPS not used");
1008 return;
1009 }
1010
1011 key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm);
1012 if (key_mgmt != -1 &&
1013 (wpa_key_mgmt_wpa_psk(key_mgmt) || key_mgmt == WPA_KEY_MGMT_OWE ||
1014 key_mgmt == WPA_KEY_MGMT_DPP)) {
1015 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore EAPOL message - "
1016 "STA is using PSK");
1017 return;
1018 }
1019
1020 if (!sta->eapol_sm) {
1021 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
1022 if (!sta->eapol_sm)
1023 return;
1024
1025 #ifdef CONFIG_WPS
1026 if (!hapd->conf->ieee802_1x && hapd->conf->wps_state) {
1027 u32 wflags = sta->flags & (WLAN_STA_WPS |
1028 WLAN_STA_WPS2 |
1029 WLAN_STA_MAYBE_WPS);
1030 if (wflags == WLAN_STA_MAYBE_WPS ||
1031 wflags == (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) {
1032 /*
1033 * Delay EAPOL frame transmission until a
1034 * possible WPS STA initiates the handshake
1035 * with EAPOL-Start. Only allow the wait to be
1036 * skipped if the STA is known to support WPS
1037 * 2.0.
1038 */
1039 wpa_printf(MSG_DEBUG, "WPS: Do not start "
1040 "EAPOL until EAPOL-Start is "
1041 "received");
1042 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
1043 }
1044 }
1045 #endif /* CONFIG_WPS */
1046
1047 sta->eapol_sm->eap_if->portEnabled = TRUE;
1048 }
1049
1050 /* since we support version 1, we can ignore version field and proceed
1051 * as specified in version 1 standard [IEEE Std 802.1X-2001, 7.5.5] */
1052 /* TODO: actually, we are not version 1 anymore.. However, Version 2
1053 * does not change frame contents, so should be ok to process frames
1054 * more or less identically. Some changes might be needed for
1055 * verification of fields. */
1056
1057 switch (hdr->type) {
1058 case IEEE802_1X_TYPE_EAP_PACKET:
1059 handle_eap(hapd, sta, (u8 *) (hdr + 1), datalen);
1060 break;
1061
1062 case IEEE802_1X_TYPE_EAPOL_START:
1063 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1064 HOSTAPD_LEVEL_DEBUG, "received EAPOL-Start "
1065 "from STA");
1066 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
1067 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
1068 if (pmksa) {
1069 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
1070 HOSTAPD_LEVEL_DEBUG, "cached PMKSA "
1071 "available - ignore it since "
1072 "STA sent EAPOL-Start");
1073 wpa_auth_sta_clear_pmksa(sta->wpa_sm, pmksa);
1074 }
1075 sta->eapol_sm->eapolStart = TRUE;
1076 sta->eapol_sm->dot1xAuthEapolStartFramesRx++;
1077 eap_server_clear_identity(sta->eapol_sm->eap);
1078 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
1079 break;
1080
1081 case IEEE802_1X_TYPE_EAPOL_LOGOFF:
1082 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1083 HOSTAPD_LEVEL_DEBUG, "received EAPOL-Logoff "
1084 "from STA");
1085 sta->acct_terminate_cause =
1086 RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
1087 accounting_sta_stop(hapd, sta);
1088 sta->eapol_sm->eapolLogoff = TRUE;
1089 sta->eapol_sm->dot1xAuthEapolLogoffFramesRx++;
1090 eap_server_clear_identity(sta->eapol_sm->eap);
1091 break;
1092
1093 case IEEE802_1X_TYPE_EAPOL_KEY:
1094 wpa_printf(MSG_DEBUG, " EAPOL-Key");
1095 if (!ap_sta_is_authorized(sta)) {
1096 wpa_printf(MSG_DEBUG, " Dropped key data from "
1097 "unauthorized Supplicant");
1098 break;
1099 }
1100 break;
1101
1102 case IEEE802_1X_TYPE_EAPOL_ENCAPSULATED_ASF_ALERT:
1103 wpa_printf(MSG_DEBUG, " EAPOL-Encapsulated-ASF-Alert");
1104 /* TODO: implement support for this; show data */
1105 break;
1106
1107 default:
1108 wpa_printf(MSG_DEBUG, " unknown IEEE 802.1X packet type");
1109 sta->eapol_sm->dot1xAuthInvalidEapolFramesRx++;
1110 break;
1111 }
1112
1113 eapol_auth_step(sta->eapol_sm);
1114 }
1115
1116
1117 /**
1118 * ieee802_1x_new_station - Start IEEE 802.1X authentication
1119 * @hapd: hostapd BSS data
1120 * @sta: The station
1121 *
1122 * This function is called to start IEEE 802.1X authentication when a new
1123 * station completes IEEE 802.11 association.
1124 */
1125 void ieee802_1x_new_station(struct hostapd_data *hapd, struct sta_info *sta)
1126 {
1127 struct rsn_pmksa_cache_entry *pmksa;
1128 int reassoc = 1;
1129 int force_1x = 0;
1130 int key_mgmt;
1131
1132 #ifdef CONFIG_WPS
1133 if (hapd->conf->wps_state &&
1134 ((hapd->conf->wpa && (sta->flags & WLAN_STA_MAYBE_WPS)) ||
1135 (sta->flags & WLAN_STA_WPS))) {
1136 /*
1137 * Need to enable IEEE 802.1X/EAPOL state machines for possible
1138 * WPS handshake even if IEEE 802.1X/EAPOL is not used for
1139 * authentication in this BSS.
1140 */
1141 force_1x = 1;
1142 }
1143 #endif /* CONFIG_WPS */
1144
1145 if (!force_1x && !hapd->conf->ieee802_1x && !hapd->conf->osen) {
1146 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - "
1147 "802.1X not enabled or forced for WPS");
1148 /*
1149 * Clear any possible EAPOL authenticator state to support
1150 * reassociation change from WPS to PSK.
1151 */
1152 ieee802_1x_free_station(hapd, sta);
1153 return;
1154 }
1155
1156 key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm);
1157 if (key_mgmt != -1 &&
1158 (wpa_key_mgmt_wpa_psk(key_mgmt) || key_mgmt == WPA_KEY_MGMT_OWE ||
1159 key_mgmt == WPA_KEY_MGMT_DPP)) {
1160 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - using PSK");
1161 /*
1162 * Clear any possible EAPOL authenticator state to support
1163 * reassociation change from WPA-EAP to PSK.
1164 */
1165 ieee802_1x_free_station(hapd, sta);
1166 return;
1167 }
1168
1169 if (sta->eapol_sm == NULL) {
1170 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1171 HOSTAPD_LEVEL_DEBUG, "start authentication");
1172 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
1173 if (sta->eapol_sm == NULL) {
1174 hostapd_logger(hapd, sta->addr,
1175 HOSTAPD_MODULE_IEEE8021X,
1176 HOSTAPD_LEVEL_INFO,
1177 "failed to allocate state machine");
1178 return;
1179 }
1180 reassoc = 0;
1181 }
1182
1183 #ifdef CONFIG_WPS
1184 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
1185 if (!hapd->conf->ieee802_1x && hapd->conf->wps_state &&
1186 !(sta->flags & WLAN_STA_WPS2)) {
1187 /*
1188 * Delay EAPOL frame transmission until a possible WPS STA
1189 * initiates the handshake with EAPOL-Start. Only allow the
1190 * wait to be skipped if the STA is known to support WPS 2.0.
1191 */
1192 wpa_printf(MSG_DEBUG, "WPS: Do not start EAPOL until "
1193 "EAPOL-Start is received");
1194 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
1195 }
1196 #endif /* CONFIG_WPS */
1197
1198 sta->eapol_sm->eap_if->portEnabled = TRUE;
1199
1200 #ifdef CONFIG_IEEE80211R_AP
1201 if (sta->auth_alg == WLAN_AUTH_FT) {
1202 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1203 HOSTAPD_LEVEL_DEBUG,
1204 "PMK from FT - skip IEEE 802.1X/EAP");
1205 /* Setup EAPOL state machines to already authenticated state
1206 * because of existing FT information from R0KH. */
1207 sta->eapol_sm->keyRun = TRUE;
1208 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
1209 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
1210 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
1211 sta->eapol_sm->authSuccess = TRUE;
1212 sta->eapol_sm->authFail = FALSE;
1213 sta->eapol_sm->portValid = TRUE;
1214 if (sta->eapol_sm->eap)
1215 eap_sm_notify_cached(sta->eapol_sm->eap);
1216 ap_sta_bind_vlan(hapd, sta);
1217 return;
1218 }
1219 #endif /* CONFIG_IEEE80211R_AP */
1220
1221 #ifdef CONFIG_FILS
1222 if (sta->auth_alg == WLAN_AUTH_FILS_SK ||
1223 sta->auth_alg == WLAN_AUTH_FILS_SK_PFS ||
1224 sta->auth_alg == WLAN_AUTH_FILS_PK) {
1225 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1226 HOSTAPD_LEVEL_DEBUG,
1227 "PMK from FILS - skip IEEE 802.1X/EAP");
1228 /* Setup EAPOL state machines to already authenticated state
1229 * because of existing FILS information. */
1230 sta->eapol_sm->keyRun = TRUE;
1231 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
1232 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
1233 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
1234 sta->eapol_sm->authSuccess = TRUE;
1235 sta->eapol_sm->authFail = FALSE;
1236 sta->eapol_sm->portValid = TRUE;
1237 if (sta->eapol_sm->eap)
1238 eap_sm_notify_cached(sta->eapol_sm->eap);
1239 wpa_auth_set_ptk_rekey_timer(sta->wpa_sm);
1240 return;
1241 }
1242 #endif /* CONFIG_FILS */
1243
1244 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
1245 if (pmksa) {
1246 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1247 HOSTAPD_LEVEL_DEBUG,
1248 "PMK from PMKSA cache - skip IEEE 802.1X/EAP");
1249 /* Setup EAPOL state machines to already authenticated state
1250 * because of existing PMKSA information in the cache. */
1251 sta->eapol_sm->keyRun = TRUE;
1252 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
1253 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
1254 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
1255 sta->eapol_sm->authSuccess = TRUE;
1256 sta->eapol_sm->authFail = FALSE;
1257 if (sta->eapol_sm->eap)
1258 eap_sm_notify_cached(sta->eapol_sm->eap);
1259 pmksa_cache_to_eapol_data(hapd, pmksa, sta->eapol_sm);
1260 ap_sta_bind_vlan(hapd, sta);
1261 } else {
1262 if (reassoc) {
1263 /*
1264 * Force EAPOL state machines to start
1265 * re-authentication without having to wait for the
1266 * Supplicant to send EAPOL-Start.
1267 */
1268 sta->eapol_sm->reAuthenticate = TRUE;
1269 }
1270 eapol_auth_step(sta->eapol_sm);
1271 }
1272 }
1273
1274
1275 void ieee802_1x_free_station(struct hostapd_data *hapd, struct sta_info *sta)
1276 {
1277 struct eapol_state_machine *sm = sta->eapol_sm;
1278
1279 #ifdef CONFIG_HS20
1280 eloop_cancel_timeout(ieee802_1x_wnm_notif_send, hapd, sta);
1281 #endif /* CONFIG_HS20 */
1282
1283 if (sta->pending_eapol_rx) {
1284 wpabuf_free(sta->pending_eapol_rx->buf);
1285 os_free(sta->pending_eapol_rx);
1286 sta->pending_eapol_rx = NULL;
1287 }
1288
1289 if (sm == NULL)
1290 return;
1291
1292 sta->eapol_sm = NULL;
1293
1294 #ifndef CONFIG_NO_RADIUS
1295 radius_msg_free(sm->last_recv_radius);
1296 radius_free_class(&sm->radius_class);
1297 #endif /* CONFIG_NO_RADIUS */
1298
1299 eapol_auth_free(sm);
1300 }
1301
1302
1303 #ifndef CONFIG_NO_RADIUS
1304 static void ieee802_1x_decapsulate_radius(struct hostapd_data *hapd,
1305 struct sta_info *sta)
1306 {
1307 struct wpabuf *eap;
1308 const struct eap_hdr *hdr;
1309 int eap_type = -1;
1310 char buf[64];
1311 struct radius_msg *msg;
1312 struct eapol_state_machine *sm = sta->eapol_sm;
1313
1314 if (sm == NULL || sm->last_recv_radius == NULL) {
1315 if (sm)
1316 sm->eap_if->aaaEapNoReq = TRUE;
1317 return;
1318 }
1319
1320 msg = sm->last_recv_radius;
1321
1322 eap = radius_msg_get_eap(msg);
1323 if (eap == NULL) {
1324 /* RFC 3579, Chap. 2.6.3:
1325 * RADIUS server SHOULD NOT send Access-Reject/no EAP-Message
1326 * attribute */
1327 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1328 HOSTAPD_LEVEL_WARNING, "could not extract "
1329 "EAP-Message from RADIUS message");
1330 sm->eap_if->aaaEapNoReq = TRUE;
1331 return;
1332 }
1333
1334 if (wpabuf_len(eap) < sizeof(*hdr)) {
1335 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1336 HOSTAPD_LEVEL_WARNING, "too short EAP packet "
1337 "received from authentication server");
1338 wpabuf_free(eap);
1339 sm->eap_if->aaaEapNoReq = TRUE;
1340 return;
1341 }
1342
1343 if (wpabuf_len(eap) > sizeof(*hdr))
1344 eap_type = (wpabuf_head_u8(eap))[sizeof(*hdr)];
1345
1346 hdr = wpabuf_head(eap);
1347 switch (hdr->code) {
1348 case EAP_CODE_REQUEST:
1349 if (eap_type >= 0)
1350 sm->eap_type_authsrv = eap_type;
1351 os_snprintf(buf, sizeof(buf), "EAP-Request-%s (%d)",
1352 eap_server_get_name(0, eap_type), eap_type);
1353 break;
1354 case EAP_CODE_RESPONSE:
1355 os_snprintf(buf, sizeof(buf), "EAP Response-%s (%d)",
1356 eap_server_get_name(0, eap_type), eap_type);
1357 break;
1358 case EAP_CODE_SUCCESS:
1359 os_strlcpy(buf, "EAP Success", sizeof(buf));
1360 break;
1361 case EAP_CODE_FAILURE:
1362 os_strlcpy(buf, "EAP Failure", sizeof(buf));
1363 break;
1364 default:
1365 os_strlcpy(buf, "unknown EAP code", sizeof(buf));
1366 break;
1367 }
1368 buf[sizeof(buf) - 1] = '\0';
1369 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1370 HOSTAPD_LEVEL_DEBUG, "decapsulated EAP packet (code=%d "
1371 "id=%d len=%d) from RADIUS server: %s",
1372 hdr->code, hdr->identifier, be_to_host16(hdr->length),
1373 buf);
1374 sm->eap_if->aaaEapReq = TRUE;
1375
1376 wpabuf_free(sm->eap_if->aaaEapReqData);
1377 sm->eap_if->aaaEapReqData = eap;
1378 }
1379
1380
1381 static void ieee802_1x_get_keys(struct hostapd_data *hapd,
1382 struct sta_info *sta, struct radius_msg *msg,
1383 struct radius_msg *req,
1384 const u8 *shared_secret,
1385 size_t shared_secret_len)
1386 {
1387 struct radius_ms_mppe_keys *keys;
1388 struct eapol_state_machine *sm = sta->eapol_sm;
1389 if (sm == NULL)
1390 return;
1391
1392 keys = radius_msg_get_ms_keys(msg, req, shared_secret,
1393 shared_secret_len);
1394
1395 if (keys && keys->send && keys->recv) {
1396 size_t len = keys->send_len + keys->recv_len;
1397 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Send-Key",
1398 keys->send, keys->send_len);
1399 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Recv-Key",
1400 keys->recv, keys->recv_len);
1401
1402 os_free(sm->eap_if->aaaEapKeyData);
1403 sm->eap_if->aaaEapKeyData = os_malloc(len);
1404 if (sm->eap_if->aaaEapKeyData) {
1405 os_memcpy(sm->eap_if->aaaEapKeyData, keys->recv,
1406 keys->recv_len);
1407 os_memcpy(sm->eap_if->aaaEapKeyData + keys->recv_len,
1408 keys->send, keys->send_len);
1409 sm->eap_if->aaaEapKeyDataLen = len;
1410 sm->eap_if->aaaEapKeyAvailable = TRUE;
1411 }
1412 } else {
1413 wpa_printf(MSG_DEBUG,
1414 "MS-MPPE: 1x_get_keys, could not get keys: %p send: %p recv: %p",
1415 keys, keys ? keys->send : NULL,
1416 keys ? keys->recv : NULL);
1417 }
1418
1419 if (keys) {
1420 os_free(keys->send);
1421 os_free(keys->recv);
1422 os_free(keys);
1423 }
1424 }
1425
1426
1427 static void ieee802_1x_store_radius_class(struct hostapd_data *hapd,
1428 struct sta_info *sta,
1429 struct radius_msg *msg)
1430 {
1431 u8 *attr_class;
1432 size_t class_len;
1433 struct eapol_state_machine *sm = sta->eapol_sm;
1434 int count, i;
1435 struct radius_attr_data *nclass;
1436 size_t nclass_count;
1437
1438 if (!hapd->conf->radius->acct_server || hapd->radius == NULL ||
1439 sm == NULL)
1440 return;
1441
1442 radius_free_class(&sm->radius_class);
1443 count = radius_msg_count_attr(msg, RADIUS_ATTR_CLASS, 1);
1444 if (count <= 0)
1445 return;
1446
1447 nclass = os_calloc(count, sizeof(struct radius_attr_data));
1448 if (nclass == NULL)
1449 return;
1450
1451 nclass_count = 0;
1452
1453 attr_class = NULL;
1454 for (i = 0; i < count; i++) {
1455 do {
1456 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CLASS,
1457 &attr_class, &class_len,
1458 attr_class) < 0) {
1459 i = count;
1460 break;
1461 }
1462 } while (class_len < 1);
1463
1464 nclass[nclass_count].data = os_memdup(attr_class, class_len);
1465 if (nclass[nclass_count].data == NULL)
1466 break;
1467
1468 nclass[nclass_count].len = class_len;
1469 nclass_count++;
1470 }
1471
1472 sm->radius_class.attr = nclass;
1473 sm->radius_class.count = nclass_count;
1474 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Stored %lu RADIUS Class "
1475 "attributes for " MACSTR,
1476 (unsigned long) sm->radius_class.count,
1477 MAC2STR(sta->addr));
1478 }
1479
1480
1481 /* Update sta->identity based on User-Name attribute in Access-Accept */
1482 static void ieee802_1x_update_sta_identity(struct hostapd_data *hapd,
1483 struct sta_info *sta,
1484 struct radius_msg *msg)
1485 {
1486 u8 *buf, *identity;
1487 size_t len;
1488 struct eapol_state_machine *sm = sta->eapol_sm;
1489
1490 if (sm == NULL)
1491 return;
1492
1493 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_USER_NAME, &buf, &len,
1494 NULL) < 0)
1495 return;
1496
1497 identity = (u8 *) dup_binstr(buf, len);
1498 if (identity == NULL)
1499 return;
1500
1501 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1502 HOSTAPD_LEVEL_DEBUG, "old identity '%s' updated with "
1503 "User-Name from Access-Accept '%s'",
1504 sm->identity ? (char *) sm->identity : "N/A",
1505 (char *) identity);
1506
1507 os_free(sm->identity);
1508 sm->identity = identity;
1509 sm->identity_len = len;
1510 }
1511
1512
1513 /* Update CUI based on Chargeable-User-Identity attribute in Access-Accept */
1514 static void ieee802_1x_update_sta_cui(struct hostapd_data *hapd,
1515 struct sta_info *sta,
1516 struct radius_msg *msg)
1517 {
1518 struct eapol_state_machine *sm = sta->eapol_sm;
1519 struct wpabuf *cui;
1520 u8 *buf;
1521 size_t len;
1522
1523 if (sm == NULL)
1524 return;
1525
1526 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CHARGEABLE_USER_IDENTITY,
1527 &buf, &len, NULL) < 0)
1528 return;
1529
1530 cui = wpabuf_alloc_copy(buf, len);
1531 if (cui == NULL)
1532 return;
1533
1534 wpabuf_free(sm->radius_cui);
1535 sm->radius_cui = cui;
1536 }
1537
1538
1539 #ifdef CONFIG_HS20
1540
1541 static void ieee802_1x_hs20_sub_rem(struct sta_info *sta, u8 *pos, size_t len)
1542 {
1543 sta->remediation = 1;
1544 os_free(sta->remediation_url);
1545 if (len > 2) {
1546 sta->remediation_url = os_malloc(len);
1547 if (!sta->remediation_url)
1548 return;
1549 sta->remediation_method = pos[0];
1550 os_memcpy(sta->remediation_url, pos + 1, len - 1);
1551 sta->remediation_url[len - 1] = '\0';
1552 wpa_printf(MSG_DEBUG, "HS 2.0: Subscription remediation needed "
1553 "for " MACSTR " - server method %u URL %s",
1554 MAC2STR(sta->addr), sta->remediation_method,
1555 sta->remediation_url);
1556 } else {
1557 sta->remediation_url = NULL;
1558 wpa_printf(MSG_DEBUG, "HS 2.0: Subscription remediation needed "
1559 "for " MACSTR, MAC2STR(sta->addr));
1560 }
1561 /* TODO: assign the STA into remediation VLAN or add filtering */
1562 }
1563
1564
1565 static void ieee802_1x_hs20_deauth_req(struct hostapd_data *hapd,
1566 struct sta_info *sta, u8 *pos,
1567 size_t len)
1568 {
1569 if (len < 3)
1570 return; /* Malformed information */
1571 sta->hs20_deauth_requested = 1;
1572 wpa_printf(MSG_DEBUG, "HS 2.0: Deauthentication request - Code %u "
1573 "Re-auth Delay %u",
1574 *pos, WPA_GET_LE16(pos + 1));
1575 wpabuf_free(sta->hs20_deauth_req);
1576 sta->hs20_deauth_req = wpabuf_alloc(len + 1);
1577 if (sta->hs20_deauth_req) {
1578 wpabuf_put_data(sta->hs20_deauth_req, pos, 3);
1579 wpabuf_put_u8(sta->hs20_deauth_req, len - 3);
1580 wpabuf_put_data(sta->hs20_deauth_req, pos + 3, len - 3);
1581 }
1582 ap_sta_session_timeout(hapd, sta, hapd->conf->hs20_deauth_req_timeout);
1583 }
1584
1585
1586 static void ieee802_1x_hs20_session_info(struct hostapd_data *hapd,
1587 struct sta_info *sta, u8 *pos,
1588 size_t len, int session_timeout)
1589 {
1590 unsigned int swt;
1591 int warning_time, beacon_int;
1592
1593 if (len < 1)
1594 return; /* Malformed information */
1595 os_free(sta->hs20_session_info_url);
1596 sta->hs20_session_info_url = os_malloc(len);
1597 if (sta->hs20_session_info_url == NULL)
1598 return;
1599 swt = pos[0];
1600 os_memcpy(sta->hs20_session_info_url, pos + 1, len - 1);
1601 sta->hs20_session_info_url[len - 1] = '\0';
1602 wpa_printf(MSG_DEBUG, "HS 2.0: Session Information URL='%s' SWT=%u "
1603 "(session_timeout=%d)",
1604 sta->hs20_session_info_url, swt, session_timeout);
1605 if (session_timeout < 0) {
1606 wpa_printf(MSG_DEBUG, "HS 2.0: No Session-Timeout set - ignore session info URL");
1607 return;
1608 }
1609 if (swt == 255)
1610 swt = 1; /* Use one minute as the AP selected value */
1611
1612 if ((unsigned int) session_timeout < swt * 60)
1613 warning_time = 0;
1614 else
1615 warning_time = session_timeout - swt * 60;
1616
1617 beacon_int = hapd->iconf->beacon_int;
1618 if (beacon_int < 1)
1619 beacon_int = 100; /* best guess */
1620 sta->hs20_disassoc_timer = swt * 60 * 1000 / beacon_int * 125 / 128;
1621 if (sta->hs20_disassoc_timer > 65535)
1622 sta->hs20_disassoc_timer = 65535;
1623
1624 ap_sta_session_warning_timeout(hapd, sta, warning_time);
1625 }
1626
1627
1628 static void ieee802_1x_hs20_t_c_filtering(struct hostapd_data *hapd,
1629 struct sta_info *sta, u8 *pos,
1630 size_t len)
1631 {
1632 if (len < 4)
1633 return; /* Malformed information */
1634 wpa_printf(MSG_DEBUG,
1635 "HS 2.0: Terms and Conditions filtering %02x %02x %02x %02x",
1636 pos[0], pos[1], pos[2], pos[3]);
1637 hs20_t_c_filtering(hapd, sta, pos[0] & BIT(0));
1638 }
1639
1640
1641 static void ieee802_1x_hs20_t_c_url(struct hostapd_data *hapd,
1642 struct sta_info *sta, u8 *pos, size_t len)
1643 {
1644 os_free(sta->t_c_url);
1645 sta->t_c_url = os_malloc(len + 1);
1646 if (!sta->t_c_url)
1647 return;
1648 os_memcpy(sta->t_c_url, pos, len);
1649 sta->t_c_url[len] = '\0';
1650 wpa_printf(MSG_DEBUG,
1651 "HS 2.0: Terms and Conditions URL %s", sta->t_c_url);
1652 }
1653
1654 #endif /* CONFIG_HS20 */
1655
1656
1657 static void ieee802_1x_check_hs20(struct hostapd_data *hapd,
1658 struct sta_info *sta,
1659 struct radius_msg *msg,
1660 int session_timeout)
1661 {
1662 #ifdef CONFIG_HS20
1663 u8 *buf, *pos, *end, type, sublen;
1664 size_t len;
1665
1666 buf = NULL;
1667 sta->remediation = 0;
1668 sta->hs20_deauth_requested = 0;
1669
1670 for (;;) {
1671 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_VENDOR_SPECIFIC,
1672 &buf, &len, buf) < 0)
1673 break;
1674 if (len < 6)
1675 continue;
1676 pos = buf;
1677 end = buf + len;
1678 if (WPA_GET_BE32(pos) != RADIUS_VENDOR_ID_WFA)
1679 continue;
1680 pos += 4;
1681
1682 type = *pos++;
1683 sublen = *pos++;
1684 if (sublen < 2)
1685 continue; /* invalid length */
1686 sublen -= 2; /* skip header */
1687 if (pos + sublen > end)
1688 continue; /* invalid WFA VSA */
1689
1690 switch (type) {
1691 case RADIUS_VENDOR_ATTR_WFA_HS20_SUBSCR_REMEDIATION:
1692 ieee802_1x_hs20_sub_rem(sta, pos, sublen);
1693 break;
1694 case RADIUS_VENDOR_ATTR_WFA_HS20_DEAUTH_REQ:
1695 ieee802_1x_hs20_deauth_req(hapd, sta, pos, sublen);
1696 break;
1697 case RADIUS_VENDOR_ATTR_WFA_HS20_SESSION_INFO_URL:
1698 ieee802_1x_hs20_session_info(hapd, sta, pos, sublen,
1699 session_timeout);
1700 break;
1701 case RADIUS_VENDOR_ATTR_WFA_HS20_T_C_FILTERING:
1702 ieee802_1x_hs20_t_c_filtering(hapd, sta, pos, sublen);
1703 break;
1704 case RADIUS_VENDOR_ATTR_WFA_HS20_T_C_URL:
1705 ieee802_1x_hs20_t_c_url(hapd, sta, pos, sublen);
1706 break;
1707 }
1708 }
1709 #endif /* CONFIG_HS20 */
1710 }
1711
1712
1713 struct sta_id_search {
1714 u8 identifier;
1715 struct eapol_state_machine *sm;
1716 };
1717
1718
1719 static int ieee802_1x_select_radius_identifier(struct hostapd_data *hapd,
1720 struct sta_info *sta,
1721 void *ctx)
1722 {
1723 struct sta_id_search *id_search = ctx;
1724 struct eapol_state_machine *sm = sta->eapol_sm;
1725
1726 if (sm && sm->radius_identifier >= 0 &&
1727 sm->radius_identifier == id_search->identifier) {
1728 id_search->sm = sm;
1729 return 1;
1730 }
1731 return 0;
1732 }
1733
1734
1735 static struct eapol_state_machine *
1736 ieee802_1x_search_radius_identifier(struct hostapd_data *hapd, u8 identifier)
1737 {
1738 struct sta_id_search id_search;
1739 id_search.identifier = identifier;
1740 id_search.sm = NULL;
1741 ap_for_each_sta(hapd, ieee802_1x_select_radius_identifier, &id_search);
1742 return id_search.sm;
1743 }
1744
1745
1746 #ifndef CONFIG_NO_VLAN
1747 static int ieee802_1x_update_vlan(struct radius_msg *msg,
1748 struct hostapd_data *hapd,
1749 struct sta_info *sta)
1750 {
1751 struct vlan_description vlan_desc;
1752
1753 os_memset(&vlan_desc, 0, sizeof(vlan_desc));
1754 vlan_desc.notempty = !!radius_msg_get_vlanid(msg, &vlan_desc.untagged,
1755 MAX_NUM_TAGGED_VLAN,
1756 vlan_desc.tagged);
1757
1758 if (vlan_desc.notempty &&
1759 !hostapd_vlan_valid(hapd->conf->vlan, &vlan_desc)) {
1760 sta->eapol_sm->authFail = TRUE;
1761 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
1762 HOSTAPD_LEVEL_INFO,
1763 "Invalid VLAN %d%s received from RADIUS server",
1764 vlan_desc.untagged,
1765 vlan_desc.tagged[0] ? "+" : "");
1766 os_memset(&vlan_desc, 0, sizeof(vlan_desc));
1767 ap_sta_set_vlan(hapd, sta, &vlan_desc);
1768 return -1;
1769 }
1770
1771 if (hapd->conf->ssid.dynamic_vlan == DYNAMIC_VLAN_REQUIRED &&
1772 !vlan_desc.notempty) {
1773 sta->eapol_sm->authFail = TRUE;
1774 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1775 HOSTAPD_LEVEL_INFO,
1776 "authentication server did not include required VLAN ID in Access-Accept");
1777 return -1;
1778 }
1779
1780 return ap_sta_set_vlan(hapd, sta, &vlan_desc);
1781 }
1782 #endif /* CONFIG_NO_VLAN */
1783
1784
1785 /**
1786 * ieee802_1x_receive_auth - Process RADIUS frames from Authentication Server
1787 * @msg: RADIUS response message
1788 * @req: RADIUS request message
1789 * @shared_secret: RADIUS shared secret
1790 * @shared_secret_len: Length of shared_secret in octets
1791 * @data: Context data (struct hostapd_data *)
1792 * Returns: Processing status
1793 */
1794 static RadiusRxResult
1795 ieee802_1x_receive_auth(struct radius_msg *msg, struct radius_msg *req,
1796 const u8 *shared_secret, size_t shared_secret_len,
1797 void *data)
1798 {
1799 struct hostapd_data *hapd = data;
1800 struct sta_info *sta;
1801 u32 session_timeout = 0, termination_action, acct_interim_interval;
1802 int session_timeout_set;
1803 u32 reason_code;
1804 struct eapol_state_machine *sm;
1805 int override_eapReq = 0;
1806 struct radius_hdr *hdr = radius_msg_get_hdr(msg);
1807
1808 sm = ieee802_1x_search_radius_identifier(hapd, hdr->identifier);
1809 if (sm == NULL) {
1810 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Could not find matching "
1811 "station for this RADIUS message");
1812 return RADIUS_RX_UNKNOWN;
1813 }
1814 sta = sm->sta;
1815
1816 /* RFC 2869, Ch. 5.13: valid Message-Authenticator attribute MUST be
1817 * present when packet contains an EAP-Message attribute */
1818 if (hdr->code == RADIUS_CODE_ACCESS_REJECT &&
1819 radius_msg_get_attr(msg, RADIUS_ATTR_MESSAGE_AUTHENTICATOR, NULL,
1820 0) < 0 &&
1821 radius_msg_get_attr(msg, RADIUS_ATTR_EAP_MESSAGE, NULL, 0) < 0) {
1822 wpa_printf(MSG_DEBUG, "Allowing RADIUS Access-Reject without "
1823 "Message-Authenticator since it does not include "
1824 "EAP-Message");
1825 } else if (radius_msg_verify(msg, shared_secret, shared_secret_len,
1826 req, 1)) {
1827 wpa_printf(MSG_INFO, "Incoming RADIUS packet did not have correct Message-Authenticator - dropped");
1828 return RADIUS_RX_INVALID_AUTHENTICATOR;
1829 }
1830
1831 if (hdr->code != RADIUS_CODE_ACCESS_ACCEPT &&
1832 hdr->code != RADIUS_CODE_ACCESS_REJECT &&
1833 hdr->code != RADIUS_CODE_ACCESS_CHALLENGE) {
1834 wpa_printf(MSG_INFO, "Unknown RADIUS message code");
1835 return RADIUS_RX_UNKNOWN;
1836 }
1837
1838 sm->radius_identifier = -1;
1839 wpa_printf(MSG_DEBUG, "RADIUS packet matching with station " MACSTR,
1840 MAC2STR(sta->addr));
1841
1842 radius_msg_free(sm->last_recv_radius);
1843 sm->last_recv_radius = msg;
1844
1845 session_timeout_set =
1846 !radius_msg_get_attr_int32(msg, RADIUS_ATTR_SESSION_TIMEOUT,
1847 &session_timeout);
1848 if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_TERMINATION_ACTION,
1849 &termination_action))
1850 termination_action = RADIUS_TERMINATION_ACTION_DEFAULT;
1851
1852 if (hapd->conf->acct_interim_interval == 0 &&
1853 hdr->code == RADIUS_CODE_ACCESS_ACCEPT &&
1854 radius_msg_get_attr_int32(msg, RADIUS_ATTR_ACCT_INTERIM_INTERVAL,
1855 &acct_interim_interval) == 0) {
1856 if (acct_interim_interval < 60) {
1857 hostapd_logger(hapd, sta->addr,
1858 HOSTAPD_MODULE_IEEE8021X,
1859 HOSTAPD_LEVEL_INFO,
1860 "ignored too small "
1861 "Acct-Interim-Interval %d",
1862 acct_interim_interval);
1863 } else
1864 sta->acct_interim_interval = acct_interim_interval;
1865 }
1866
1867
1868 switch (hdr->code) {
1869 case RADIUS_CODE_ACCESS_ACCEPT:
1870 #ifndef CONFIG_NO_VLAN
1871 if (hapd->conf->ssid.dynamic_vlan != DYNAMIC_VLAN_DISABLED &&
1872 ieee802_1x_update_vlan(msg, hapd, sta) < 0)
1873 break;
1874
1875 if (sta->vlan_id > 0) {
1876 hostapd_logger(hapd, sta->addr,
1877 HOSTAPD_MODULE_RADIUS,
1878 HOSTAPD_LEVEL_INFO,
1879 "VLAN ID %d", sta->vlan_id);
1880 }
1881
1882 if ((sta->flags & WLAN_STA_ASSOC) &&
1883 ap_sta_bind_vlan(hapd, sta) < 0)
1884 break;
1885 #endif /* CONFIG_NO_VLAN */
1886
1887 sta->session_timeout_set = !!session_timeout_set;
1888 os_get_reltime(&sta->session_timeout);
1889 sta->session_timeout.sec += session_timeout;
1890
1891 /* RFC 3580, Ch. 3.17 */
1892 if (session_timeout_set && termination_action ==
1893 RADIUS_TERMINATION_ACTION_RADIUS_REQUEST)
1894 sm->reAuthPeriod = session_timeout;
1895 else if (session_timeout_set)
1896 ap_sta_session_timeout(hapd, sta, session_timeout);
1897 else
1898 ap_sta_no_session_timeout(hapd, sta);
1899
1900 sm->eap_if->aaaSuccess = TRUE;
1901 override_eapReq = 1;
1902 ieee802_1x_get_keys(hapd, sta, msg, req, shared_secret,
1903 shared_secret_len);
1904 ieee802_1x_store_radius_class(hapd, sta, msg);
1905 ieee802_1x_update_sta_identity(hapd, sta, msg);
1906 ieee802_1x_update_sta_cui(hapd, sta, msg);
1907 ieee802_1x_check_hs20(hapd, sta, msg,
1908 session_timeout_set ?
1909 (int) session_timeout : -1);
1910 break;
1911 case RADIUS_CODE_ACCESS_REJECT:
1912 sm->eap_if->aaaFail = TRUE;
1913 override_eapReq = 1;
1914 if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_WLAN_REASON_CODE,
1915 &reason_code) == 0) {
1916 wpa_printf(MSG_DEBUG,
1917 "RADIUS server indicated WLAN-Reason-Code %u in Access-Reject for "
1918 MACSTR, reason_code, MAC2STR(sta->addr));
1919 sta->disconnect_reason_code = reason_code;
1920 }
1921 break;
1922 case RADIUS_CODE_ACCESS_CHALLENGE:
1923 sm->eap_if->aaaEapReq = TRUE;
1924 if (session_timeout_set) {
1925 /* RFC 2869, Ch. 2.3.2; RFC 3580, Ch. 3.17 */
1926 sm->eap_if->aaaMethodTimeout = session_timeout;
1927 hostapd_logger(hapd, sm->addr,
1928 HOSTAPD_MODULE_IEEE8021X,
1929 HOSTAPD_LEVEL_DEBUG,
1930 "using EAP timeout of %d seconds (from "
1931 "RADIUS)",
1932 sm->eap_if->aaaMethodTimeout);
1933 } else {
1934 /*
1935 * Use dynamic retransmission behavior per EAP
1936 * specification.
1937 */
1938 sm->eap_if->aaaMethodTimeout = 0;
1939 }
1940 break;
1941 }
1942
1943 ieee802_1x_decapsulate_radius(hapd, sta);
1944 if (override_eapReq)
1945 sm->eap_if->aaaEapReq = FALSE;
1946
1947 #ifdef CONFIG_FILS
1948 #ifdef NEED_AP_MLME
1949 if (sta->flags & WLAN_STA_PENDING_FILS_ERP) {
1950 /* TODO: Add a PMKSA entry on success? */
1951 ieee802_11_finish_fils_auth(
1952 hapd, sta, hdr->code == RADIUS_CODE_ACCESS_ACCEPT,
1953 sm->eap_if->aaaEapReqData,
1954 sm->eap_if->aaaEapKeyData,
1955 sm->eap_if->aaaEapKeyDataLen);
1956 }
1957 #endif /* NEED_AP_MLME */
1958 #endif /* CONFIG_FILS */
1959
1960 eapol_auth_step(sm);
1961
1962 return RADIUS_RX_QUEUED;
1963 }
1964 #endif /* CONFIG_NO_RADIUS */
1965
1966
1967 void ieee802_1x_abort_auth(struct hostapd_data *hapd, struct sta_info *sta)
1968 {
1969 struct eapol_state_machine *sm = sta->eapol_sm;
1970 if (sm == NULL)
1971 return;
1972
1973 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1974 HOSTAPD_LEVEL_DEBUG, "aborting authentication");
1975
1976 #ifndef CONFIG_NO_RADIUS
1977 radius_msg_free(sm->last_recv_radius);
1978 sm->last_recv_radius = NULL;
1979 #endif /* CONFIG_NO_RADIUS */
1980
1981 if (sm->eap_if->eapTimeout) {
1982 /*
1983 * Disconnect the STA since it did not reply to the last EAP
1984 * request and we cannot continue EAP processing (EAP-Failure
1985 * could only be sent if the EAP peer actually replied).
1986 */
1987 wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "EAP Timeout, STA " MACSTR,
1988 MAC2STR(sta->addr));
1989
1990 sm->eap_if->portEnabled = FALSE;
1991 ap_sta_disconnect(hapd, sta, sta->addr,
1992 WLAN_REASON_PREV_AUTH_NOT_VALID);
1993 }
1994 }
1995
1996
1997 static int ieee802_1x_rekey_broadcast(struct hostapd_data *hapd)
1998 {
1999 struct eapol_authenticator *eapol = hapd->eapol_auth;
2000
2001 if (hapd->conf->default_wep_key_len < 1)
2002 return 0;
2003
2004 os_free(eapol->default_wep_key);
2005 eapol->default_wep_key = os_malloc(hapd->conf->default_wep_key_len);
2006 if (eapol->default_wep_key == NULL ||
2007 random_get_bytes(eapol->default_wep_key,
2008 hapd->conf->default_wep_key_len)) {
2009 wpa_printf(MSG_INFO, "Could not generate random WEP key");
2010 os_free(eapol->default_wep_key);
2011 eapol->default_wep_key = NULL;
2012 return -1;
2013 }
2014
2015 wpa_hexdump_key(MSG_DEBUG, "IEEE 802.1X: New default WEP key",
2016 eapol->default_wep_key,
2017 hapd->conf->default_wep_key_len);
2018
2019 return 0;
2020 }
2021
2022
2023 static int ieee802_1x_sta_key_available(struct hostapd_data *hapd,
2024 struct sta_info *sta, void *ctx)
2025 {
2026 if (sta->eapol_sm) {
2027 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
2028 eapol_auth_step(sta->eapol_sm);
2029 }
2030 return 0;
2031 }
2032
2033
2034 static void ieee802_1x_rekey(void *eloop_ctx, void *timeout_ctx)
2035 {
2036 struct hostapd_data *hapd = eloop_ctx;
2037 struct eapol_authenticator *eapol = hapd->eapol_auth;
2038
2039 if (eapol->default_wep_key_idx >= 3)
2040 eapol->default_wep_key_idx =
2041 hapd->conf->individual_wep_key_len > 0 ? 1 : 0;
2042 else
2043 eapol->default_wep_key_idx++;
2044
2045 wpa_printf(MSG_DEBUG, "IEEE 802.1X: New default WEP key index %d",
2046 eapol->default_wep_key_idx);
2047
2048 if (ieee802_1x_rekey_broadcast(hapd)) {
2049 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
2050 HOSTAPD_LEVEL_WARNING, "failed to generate a "
2051 "new broadcast key");
2052 os_free(eapol->default_wep_key);
2053 eapol->default_wep_key = NULL;
2054 return;
2055 }
2056
2057 /* TODO: Could setup key for RX here, but change default TX keyid only
2058 * after new broadcast key has been sent to all stations. */
2059 if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
2060 broadcast_ether_addr,
2061 eapol->default_wep_key_idx, 1, NULL, 0,
2062 eapol->default_wep_key,
2063 hapd->conf->default_wep_key_len)) {
2064 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
2065 HOSTAPD_LEVEL_WARNING, "failed to configure a "
2066 "new broadcast key");
2067 os_free(eapol->default_wep_key);
2068 eapol->default_wep_key = NULL;
2069 return;
2070 }
2071
2072 ap_for_each_sta(hapd, ieee802_1x_sta_key_available, NULL);
2073
2074 if (hapd->conf->wep_rekeying_period > 0) {
2075 eloop_register_timeout(hapd->conf->wep_rekeying_period, 0,
2076 ieee802_1x_rekey, hapd, NULL);
2077 }
2078 }
2079
2080
2081 static void ieee802_1x_eapol_send(void *ctx, void *sta_ctx, u8 type,
2082 const u8 *data, size_t datalen)
2083 {
2084 #ifdef CONFIG_WPS
2085 struct sta_info *sta = sta_ctx;
2086
2087 if ((sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) ==
2088 WLAN_STA_MAYBE_WPS) {
2089 const u8 *identity;
2090 size_t identity_len;
2091 struct eapol_state_machine *sm = sta->eapol_sm;
2092
2093 identity = eap_get_identity(sm->eap, &identity_len);
2094 if (identity &&
2095 ((identity_len == WSC_ID_ENROLLEE_LEN &&
2096 os_memcmp(identity, WSC_ID_ENROLLEE,
2097 WSC_ID_ENROLLEE_LEN) == 0) ||
2098 (identity_len == WSC_ID_REGISTRAR_LEN &&
2099 os_memcmp(identity, WSC_ID_REGISTRAR,
2100 WSC_ID_REGISTRAR_LEN) == 0))) {
2101 wpa_printf(MSG_DEBUG, "WPS: WLAN_STA_MAYBE_WPS -> "
2102 "WLAN_STA_WPS");
2103 sta->flags |= WLAN_STA_WPS;
2104 }
2105 }
2106 #endif /* CONFIG_WPS */
2107
2108 ieee802_1x_send(ctx, sta_ctx, type, data, datalen);
2109 }
2110
2111
2112 static void ieee802_1x_aaa_send(void *ctx, void *sta_ctx,
2113 const u8 *data, size_t datalen)
2114 {
2115 #ifndef CONFIG_NO_RADIUS
2116 struct hostapd_data *hapd = ctx;
2117 struct sta_info *sta = sta_ctx;
2118
2119 ieee802_1x_encapsulate_radius(hapd, sta, data, datalen);
2120 #endif /* CONFIG_NO_RADIUS */
2121 }
2122
2123
2124 static void _ieee802_1x_finished(void *ctx, void *sta_ctx, int success,
2125 int preauth, int remediation)
2126 {
2127 struct hostapd_data *hapd = ctx;
2128 struct sta_info *sta = sta_ctx;
2129 if (preauth)
2130 rsn_preauth_finished(hapd, sta, success);
2131 else
2132 ieee802_1x_finished(hapd, sta, success, remediation);
2133 }
2134
2135
2136 static int ieee802_1x_get_eap_user(void *ctx, const u8 *identity,
2137 size_t identity_len, int phase2,
2138 struct eap_user *user)
2139 {
2140 struct hostapd_data *hapd = ctx;
2141 const struct hostapd_eap_user *eap_user;
2142 int i;
2143 int rv = -1;
2144
2145 eap_user = hostapd_get_eap_user(hapd, identity, identity_len, phase2);
2146 if (eap_user == NULL)
2147 goto out;
2148
2149 os_memset(user, 0, sizeof(*user));
2150 user->phase2 = phase2;
2151 for (i = 0; i < EAP_MAX_METHODS; i++) {
2152 user->methods[i].vendor = eap_user->methods[i].vendor;
2153 user->methods[i].method = eap_user->methods[i].method;
2154 }
2155
2156 if (eap_user->password) {
2157 user->password = os_memdup(eap_user->password,
2158 eap_user->password_len);
2159 if (user->password == NULL)
2160 goto out;
2161 user->password_len = eap_user->password_len;
2162 user->password_hash = eap_user->password_hash;
2163 if (eap_user->salt && eap_user->salt_len) {
2164 user->salt = os_memdup(eap_user->salt,
2165 eap_user->salt_len);
2166 if (!user->salt)
2167 goto out;
2168 user->salt_len = eap_user->salt_len;
2169 }
2170 }
2171 user->force_version = eap_user->force_version;
2172 user->macacl = eap_user->macacl;
2173 user->ttls_auth = eap_user->ttls_auth;
2174 user->remediation = eap_user->remediation;
2175 rv = 0;
2176
2177 out:
2178 if (rv)
2179 wpa_printf(MSG_DEBUG, "%s: Failed to find user", __func__);
2180
2181 return rv;
2182 }
2183
2184
2185 static int ieee802_1x_sta_entry_alive(void *ctx, const u8 *addr)
2186 {
2187 struct hostapd_data *hapd = ctx;
2188 struct sta_info *sta;
2189 sta = ap_get_sta(hapd, addr);
2190 if (sta == NULL || sta->eapol_sm == NULL)
2191 return 0;
2192 return 1;
2193 }
2194
2195
2196 static void ieee802_1x_logger(void *ctx, const u8 *addr,
2197 eapol_logger_level level, const char *txt)
2198 {
2199 #ifndef CONFIG_NO_HOSTAPD_LOGGER
2200 struct hostapd_data *hapd = ctx;
2201 int hlevel;
2202
2203 switch (level) {
2204 case EAPOL_LOGGER_WARNING:
2205 hlevel = HOSTAPD_LEVEL_WARNING;
2206 break;
2207 case EAPOL_LOGGER_INFO:
2208 hlevel = HOSTAPD_LEVEL_INFO;
2209 break;
2210 case EAPOL_LOGGER_DEBUG:
2211 default:
2212 hlevel = HOSTAPD_LEVEL_DEBUG;
2213 break;
2214 }
2215
2216 hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE8021X, hlevel, "%s",
2217 txt);
2218 #endif /* CONFIG_NO_HOSTAPD_LOGGER */
2219 }
2220
2221
2222 static void ieee802_1x_set_port_authorized(void *ctx, void *sta_ctx,
2223 int authorized)
2224 {
2225 struct hostapd_data *hapd = ctx;
2226 struct sta_info *sta = sta_ctx;
2227 ieee802_1x_set_sta_authorized(hapd, sta, authorized);
2228 }
2229
2230
2231 static void _ieee802_1x_abort_auth(void *ctx, void *sta_ctx)
2232 {
2233 struct hostapd_data *hapd = ctx;
2234 struct sta_info *sta = sta_ctx;
2235 ieee802_1x_abort_auth(hapd, sta);
2236 }
2237
2238
2239 static void _ieee802_1x_tx_key(void *ctx, void *sta_ctx)
2240 {
2241 #ifndef CONFIG_FIPS
2242 #ifndef CONFIG_NO_RC4
2243 struct hostapd_data *hapd = ctx;
2244 struct sta_info *sta = sta_ctx;
2245 ieee802_1x_tx_key(hapd, sta);
2246 #endif /* CONFIG_NO_RC4 */
2247 #endif /* CONFIG_FIPS */
2248 }
2249
2250
2251 static void ieee802_1x_eapol_event(void *ctx, void *sta_ctx,
2252 enum eapol_event type)
2253 {
2254 /* struct hostapd_data *hapd = ctx; */
2255 struct sta_info *sta = sta_ctx;
2256 switch (type) {
2257 case EAPOL_AUTH_SM_CHANGE:
2258 wpa_auth_sm_notify(sta->wpa_sm);
2259 break;
2260 case EAPOL_AUTH_REAUTHENTICATE:
2261 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
2262 break;
2263 }
2264 }
2265
2266
2267 #ifdef CONFIG_ERP
2268
2269 static struct eap_server_erp_key *
2270 ieee802_1x_erp_get_key(void *ctx, const char *keyname)
2271 {
2272 struct hostapd_data *hapd = ctx;
2273 struct eap_server_erp_key *erp;
2274
2275 dl_list_for_each(erp, &hapd->erp_keys, struct eap_server_erp_key,
2276 list) {
2277 if (os_strcmp(erp->keyname_nai, keyname) == 0)
2278 return erp;
2279 }
2280
2281 return NULL;
2282 }
2283
2284
2285 static int ieee802_1x_erp_add_key(void *ctx, struct eap_server_erp_key *erp)
2286 {
2287 struct hostapd_data *hapd = ctx;
2288
2289 dl_list_add(&hapd->erp_keys, &erp->list);
2290 return 0;
2291 }
2292
2293 #endif /* CONFIG_ERP */
2294
2295
2296 int ieee802_1x_init(struct hostapd_data *hapd)
2297 {
2298 int i;
2299 struct eapol_auth_config conf;
2300 struct eapol_auth_cb cb;
2301
2302 dl_list_init(&hapd->erp_keys);
2303
2304 os_memset(&conf, 0, sizeof(conf));
2305 conf.ctx = hapd;
2306 conf.eap_reauth_period = hapd->conf->eap_reauth_period;
2307 conf.wpa = hapd->conf->wpa;
2308 conf.individual_wep_key_len = hapd->conf->individual_wep_key_len;
2309 conf.eap_server = hapd->conf->eap_server;
2310 conf.ssl_ctx = hapd->ssl_ctx;
2311 conf.msg_ctx = hapd->msg_ctx;
2312 conf.eap_sim_db_priv = hapd->eap_sim_db_priv;
2313 conf.eap_req_id_text = hapd->conf->eap_req_id_text;
2314 conf.eap_req_id_text_len = hapd->conf->eap_req_id_text_len;
2315 conf.erp_send_reauth_start = hapd->conf->erp_send_reauth_start;
2316 conf.erp_domain = hapd->conf->erp_domain;
2317 conf.erp = hapd->conf->eap_server_erp;
2318 conf.tls_session_lifetime = hapd->conf->tls_session_lifetime;
2319 conf.tls_flags = hapd->conf->tls_flags;
2320 conf.pac_opaque_encr_key = hapd->conf->pac_opaque_encr_key;
2321 conf.eap_fast_a_id = hapd->conf->eap_fast_a_id;
2322 conf.eap_fast_a_id_len = hapd->conf->eap_fast_a_id_len;
2323 conf.eap_fast_a_id_info = hapd->conf->eap_fast_a_id_info;
2324 conf.eap_fast_prov = hapd->conf->eap_fast_prov;
2325 conf.pac_key_lifetime = hapd->conf->pac_key_lifetime;
2326 conf.pac_key_refresh_time = hapd->conf->pac_key_refresh_time;
2327 conf.eap_sim_aka_result_ind = hapd->conf->eap_sim_aka_result_ind;
2328 conf.tnc = hapd->conf->tnc;
2329 conf.wps = hapd->wps;
2330 conf.fragment_size = hapd->conf->fragment_size;
2331 conf.pwd_group = hapd->conf->pwd_group;
2332 conf.pbc_in_m1 = hapd->conf->pbc_in_m1;
2333 if (hapd->conf->server_id) {
2334 conf.server_id = (const u8 *) hapd->conf->server_id;
2335 conf.server_id_len = os_strlen(hapd->conf->server_id);
2336 } else {
2337 conf.server_id = (const u8 *) "hostapd";
2338 conf.server_id_len = 7;
2339 }
2340
2341 os_memset(&cb, 0, sizeof(cb));
2342 cb.eapol_send = ieee802_1x_eapol_send;
2343 cb.aaa_send = ieee802_1x_aaa_send;
2344 cb.finished = _ieee802_1x_finished;
2345 cb.get_eap_user = ieee802_1x_get_eap_user;
2346 cb.sta_entry_alive = ieee802_1x_sta_entry_alive;
2347 cb.logger = ieee802_1x_logger;
2348 cb.set_port_authorized = ieee802_1x_set_port_authorized;
2349 cb.abort_auth = _ieee802_1x_abort_auth;
2350 cb.tx_key = _ieee802_1x_tx_key;
2351 cb.eapol_event = ieee802_1x_eapol_event;
2352 #ifdef CONFIG_ERP
2353 cb.erp_get_key = ieee802_1x_erp_get_key;
2354 cb.erp_add_key = ieee802_1x_erp_add_key;
2355 #endif /* CONFIG_ERP */
2356
2357 hapd->eapol_auth = eapol_auth_init(&conf, &cb);
2358 if (hapd->eapol_auth == NULL)
2359 return -1;
2360
2361 if ((hapd->conf->ieee802_1x || hapd->conf->wpa) &&
2362 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 1))
2363 return -1;
2364
2365 #ifndef CONFIG_NO_RADIUS
2366 if (radius_client_register(hapd->radius, RADIUS_AUTH,
2367 ieee802_1x_receive_auth, hapd))
2368 return -1;
2369 #endif /* CONFIG_NO_RADIUS */
2370
2371 if (hapd->conf->default_wep_key_len) {
2372 for (i = 0; i < 4; i++)
2373 hostapd_drv_set_key(hapd->conf->iface, hapd,
2374 WPA_ALG_NONE, NULL, i, 0, NULL, 0,
2375 NULL, 0);
2376
2377 ieee802_1x_rekey(hapd, NULL);
2378
2379 if (hapd->eapol_auth->default_wep_key == NULL)
2380 return -1;
2381 }
2382
2383 return 0;
2384 }
2385
2386
2387 void ieee802_1x_erp_flush(struct hostapd_data *hapd)
2388 {
2389 struct eap_server_erp_key *erp;
2390
2391 while ((erp = dl_list_first(&hapd->erp_keys, struct eap_server_erp_key,
2392 list)) != NULL) {
2393 dl_list_del(&erp->list);
2394 bin_clear_free(erp, sizeof(*erp));
2395 }
2396 }
2397
2398
2399 void ieee802_1x_deinit(struct hostapd_data *hapd)
2400 {
2401 eloop_cancel_timeout(ieee802_1x_rekey, hapd, NULL);
2402
2403 if (hapd->driver && hapd->drv_priv &&
2404 (hapd->conf->ieee802_1x || hapd->conf->wpa))
2405 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0);
2406
2407 eapol_auth_deinit(hapd->eapol_auth);
2408 hapd->eapol_auth = NULL;
2409
2410 ieee802_1x_erp_flush(hapd);
2411 }
2412
2413
2414 int ieee802_1x_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
2415 const u8 *buf, size_t len, int ack)
2416 {
2417 struct ieee80211_hdr *hdr;
2418 u8 *pos;
2419 const unsigned char rfc1042_hdr[ETH_ALEN] =
2420 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
2421
2422 if (sta == NULL)
2423 return -1;
2424 if (len < sizeof(*hdr) + sizeof(rfc1042_hdr) + 2)
2425 return 0;
2426
2427 hdr = (struct ieee80211_hdr *) buf;
2428 pos = (u8 *) (hdr + 1);
2429 if (os_memcmp(pos, rfc1042_hdr, sizeof(rfc1042_hdr)) != 0)
2430 return 0;
2431 pos += sizeof(rfc1042_hdr);
2432 if (WPA_GET_BE16(pos) != ETH_P_PAE)
2433 return 0;
2434 pos += 2;
2435
2436 return ieee802_1x_eapol_tx_status(hapd, sta, pos, buf + len - pos,
2437 ack);
2438 }
2439
2440
2441 int ieee802_1x_eapol_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
2442 const u8 *buf, int len, int ack)
2443 {
2444 const struct ieee802_1x_hdr *xhdr =
2445 (const struct ieee802_1x_hdr *) buf;
2446 const u8 *pos = buf + sizeof(*xhdr);
2447 struct ieee802_1x_eapol_key *key;
2448
2449 if (len < (int) sizeof(*xhdr))
2450 return 0;
2451 wpa_printf(MSG_DEBUG, "IEEE 802.1X: " MACSTR " TX status - version=%d "
2452 "type=%d length=%d - ack=%d",
2453 MAC2STR(sta->addr), xhdr->version, xhdr->type,
2454 be_to_host16(xhdr->length), ack);
2455
2456 #ifdef CONFIG_WPS
2457 if (xhdr->type == IEEE802_1X_TYPE_EAP_PACKET && ack &&
2458 (sta->flags & WLAN_STA_WPS) &&
2459 ap_sta_pending_delayed_1x_auth_fail_disconnect(hapd, sta)) {
2460 wpa_printf(MSG_DEBUG,
2461 "WPS: Indicate EAP completion on ACK for EAP-Failure");
2462 hostapd_wps_eap_completed(hapd);
2463 }
2464 #endif /* CONFIG_WPS */
2465
2466 if (xhdr->type != IEEE802_1X_TYPE_EAPOL_KEY)
2467 return 0;
2468
2469 if (pos + sizeof(struct wpa_eapol_key) <= buf + len) {
2470 const struct wpa_eapol_key *wpa;
2471 wpa = (const struct wpa_eapol_key *) pos;
2472 if (wpa->type == EAPOL_KEY_TYPE_RSN ||
2473 wpa->type == EAPOL_KEY_TYPE_WPA)
2474 wpa_auth_eapol_key_tx_status(hapd->wpa_auth,
2475 sta->wpa_sm, ack);
2476 }
2477
2478 /* EAPOL EAP-Packet packets are eventually re-sent by either Supplicant
2479 * or Authenticator state machines, but EAPOL-Key packets are not
2480 * retransmitted in case of failure. Try to re-send failed EAPOL-Key
2481 * packets couple of times because otherwise STA keys become
2482 * unsynchronized with AP. */
2483 if (!ack && pos + sizeof(*key) <= buf + len) {
2484 key = (struct ieee802_1x_eapol_key *) pos;
2485 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
2486 HOSTAPD_LEVEL_DEBUG, "did not Ack EAPOL-Key "
2487 "frame (%scast index=%d)",
2488 key->key_index & BIT(7) ? "uni" : "broad",
2489 key->key_index & ~BIT(7));
2490 /* TODO: re-send EAPOL-Key couple of times (with short delay
2491 * between them?). If all attempt fail, report error and
2492 * deauthenticate STA so that it will get new keys when
2493 * authenticating again (e.g., after returning in range).
2494 * Separate limit/transmit state needed both for unicast and
2495 * broadcast keys(?) */
2496 }
2497 /* TODO: could move unicast key configuration from ieee802_1x_tx_key()
2498 * to here and change the key only if the EAPOL-Key packet was Acked.
2499 */
2500
2501 return 1;
2502 }
2503
2504
2505 u8 * ieee802_1x_get_identity(struct eapol_state_machine *sm, size_t *len)
2506 {
2507 if (sm == NULL || sm->identity == NULL)
2508 return NULL;
2509
2510 *len = sm->identity_len;
2511 return sm->identity;
2512 }
2513
2514
2515 u8 * ieee802_1x_get_radius_class(struct eapol_state_machine *sm, size_t *len,
2516 int idx)
2517 {
2518 if (sm == NULL || sm->radius_class.attr == NULL ||
2519 idx >= (int) sm->radius_class.count)
2520 return NULL;
2521
2522 *len = sm->radius_class.attr[idx].len;
2523 return sm->radius_class.attr[idx].data;
2524 }
2525
2526
2527 struct wpabuf * ieee802_1x_get_radius_cui(struct eapol_state_machine *sm)
2528 {
2529 if (sm == NULL)
2530 return NULL;
2531 return sm->radius_cui;
2532 }
2533
2534
2535 const u8 * ieee802_1x_get_key(struct eapol_state_machine *sm, size_t *len)
2536 {
2537 *len = 0;
2538 if (sm == NULL)
2539 return NULL;
2540
2541 *len = sm->eap_if->eapKeyDataLen;
2542 return sm->eap_if->eapKeyData;
2543 }
2544
2545
2546 void ieee802_1x_notify_port_enabled(struct eapol_state_machine *sm,
2547 int enabled)
2548 {
2549 if (sm == NULL)
2550 return;
2551 sm->eap_if->portEnabled = enabled ? TRUE : FALSE;
2552 eapol_auth_step(sm);
2553 }
2554
2555
2556 void ieee802_1x_notify_port_valid(struct eapol_state_machine *sm,
2557 int valid)
2558 {
2559 if (sm == NULL)
2560 return;
2561 sm->portValid = valid ? TRUE : FALSE;
2562 eapol_auth_step(sm);
2563 }
2564
2565
2566 void ieee802_1x_notify_pre_auth(struct eapol_state_machine *sm, int pre_auth)
2567 {
2568 if (sm == NULL)
2569 return;
2570 if (pre_auth)
2571 sm->flags |= EAPOL_SM_PREAUTH;
2572 else
2573 sm->flags &= ~EAPOL_SM_PREAUTH;
2574 }
2575
2576
2577 static const char * bool_txt(Boolean val)
2578 {
2579 return val ? "TRUE" : "FALSE";
2580 }
2581
2582
2583 int ieee802_1x_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
2584 {
2585 /* TODO */
2586 return 0;
2587 }
2588
2589
2590 int ieee802_1x_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
2591 char *buf, size_t buflen)
2592 {
2593 int len = 0, ret;
2594 struct eapol_state_machine *sm = sta->eapol_sm;
2595 struct os_reltime diff;
2596 const char *name1;
2597 const char *name2;
2598 char *identity_buf = NULL;
2599
2600 if (sm == NULL)
2601 return 0;
2602
2603 ret = os_snprintf(buf + len, buflen - len,
2604 "dot1xPaePortNumber=%d\n"
2605 "dot1xPaePortProtocolVersion=%d\n"
2606 "dot1xPaePortCapabilities=1\n"
2607 "dot1xPaePortInitialize=%d\n"
2608 "dot1xPaePortReauthenticate=FALSE\n",
2609 sta->aid,
2610 EAPOL_VERSION,
2611 sm->initialize);
2612 if (os_snprintf_error(buflen - len, ret))
2613 return len;
2614 len += ret;
2615
2616 /* dot1xAuthConfigTable */
2617 ret = os_snprintf(buf + len, buflen - len,
2618 "dot1xAuthPaeState=%d\n"
2619 "dot1xAuthBackendAuthState=%d\n"
2620 "dot1xAuthAdminControlledDirections=%d\n"
2621 "dot1xAuthOperControlledDirections=%d\n"
2622 "dot1xAuthAuthControlledPortStatus=%d\n"
2623 "dot1xAuthAuthControlledPortControl=%d\n"
2624 "dot1xAuthQuietPeriod=%u\n"
2625 "dot1xAuthServerTimeout=%u\n"
2626 "dot1xAuthReAuthPeriod=%u\n"
2627 "dot1xAuthReAuthEnabled=%s\n"
2628 "dot1xAuthKeyTxEnabled=%s\n",
2629 sm->auth_pae_state + 1,
2630 sm->be_auth_state + 1,
2631 sm->adminControlledDirections,
2632 sm->operControlledDirections,
2633 sm->authPortStatus,
2634 sm->portControl,
2635 sm->quietPeriod,
2636 sm->serverTimeout,
2637 sm->reAuthPeriod,
2638 bool_txt(sm->reAuthEnabled),
2639 bool_txt(sm->keyTxEnabled));
2640 if (os_snprintf_error(buflen - len, ret))
2641 return len;
2642 len += ret;
2643
2644 /* dot1xAuthStatsTable */
2645 ret = os_snprintf(buf + len, buflen - len,
2646 "dot1xAuthEapolFramesRx=%u\n"
2647 "dot1xAuthEapolFramesTx=%u\n"
2648 "dot1xAuthEapolStartFramesRx=%u\n"
2649 "dot1xAuthEapolLogoffFramesRx=%u\n"
2650 "dot1xAuthEapolRespIdFramesRx=%u\n"
2651 "dot1xAuthEapolRespFramesRx=%u\n"
2652 "dot1xAuthEapolReqIdFramesTx=%u\n"
2653 "dot1xAuthEapolReqFramesTx=%u\n"
2654 "dot1xAuthInvalidEapolFramesRx=%u\n"
2655 "dot1xAuthEapLengthErrorFramesRx=%u\n"
2656 "dot1xAuthLastEapolFrameVersion=%u\n"
2657 "dot1xAuthLastEapolFrameSource=" MACSTR "\n",
2658 sm->dot1xAuthEapolFramesRx,
2659 sm->dot1xAuthEapolFramesTx,
2660 sm->dot1xAuthEapolStartFramesRx,
2661 sm->dot1xAuthEapolLogoffFramesRx,
2662 sm->dot1xAuthEapolRespIdFramesRx,
2663 sm->dot1xAuthEapolRespFramesRx,
2664 sm->dot1xAuthEapolReqIdFramesTx,
2665 sm->dot1xAuthEapolReqFramesTx,
2666 sm->dot1xAuthInvalidEapolFramesRx,
2667 sm->dot1xAuthEapLengthErrorFramesRx,
2668 sm->dot1xAuthLastEapolFrameVersion,
2669 MAC2STR(sm->addr));
2670 if (os_snprintf_error(buflen - len, ret))
2671 return len;
2672 len += ret;
2673
2674 /* dot1xAuthDiagTable */
2675 ret = os_snprintf(buf + len, buflen - len,
2676 "dot1xAuthEntersConnecting=%u\n"
2677 "dot1xAuthEapLogoffsWhileConnecting=%u\n"
2678 "dot1xAuthEntersAuthenticating=%u\n"
2679 "dot1xAuthAuthSuccessesWhileAuthenticating=%u\n"
2680 "dot1xAuthAuthTimeoutsWhileAuthenticating=%u\n"
2681 "dot1xAuthAuthFailWhileAuthenticating=%u\n"
2682 "dot1xAuthAuthEapStartsWhileAuthenticating=%u\n"
2683 "dot1xAuthAuthEapLogoffWhileAuthenticating=%u\n"
2684 "dot1xAuthAuthReauthsWhileAuthenticated=%u\n"
2685 "dot1xAuthAuthEapStartsWhileAuthenticated=%u\n"
2686 "dot1xAuthAuthEapLogoffWhileAuthenticated=%u\n"
2687 "dot1xAuthBackendResponses=%u\n"
2688 "dot1xAuthBackendAccessChallenges=%u\n"
2689 "dot1xAuthBackendOtherRequestsToSupplicant=%u\n"
2690 "dot1xAuthBackendAuthSuccesses=%u\n"
2691 "dot1xAuthBackendAuthFails=%u\n",
2692 sm->authEntersConnecting,
2693 sm->authEapLogoffsWhileConnecting,
2694 sm->authEntersAuthenticating,
2695 sm->authAuthSuccessesWhileAuthenticating,
2696 sm->authAuthTimeoutsWhileAuthenticating,
2697 sm->authAuthFailWhileAuthenticating,
2698 sm->authAuthEapStartsWhileAuthenticating,
2699 sm->authAuthEapLogoffWhileAuthenticating,
2700 sm->authAuthReauthsWhileAuthenticated,
2701 sm->authAuthEapStartsWhileAuthenticated,
2702 sm->authAuthEapLogoffWhileAuthenticated,
2703 sm->backendResponses,
2704 sm->backendAccessChallenges,
2705 sm->backendOtherRequestsToSupplicant,
2706 sm->backendAuthSuccesses,
2707 sm->backendAuthFails);
2708 if (os_snprintf_error(buflen - len, ret))
2709 return len;
2710 len += ret;
2711
2712 /* dot1xAuthSessionStatsTable */
2713 os_reltime_age(&sta->acct_session_start, &diff);
2714 if (sm->eap && !sm->identity) {
2715 const u8 *id;
2716 size_t id_len;
2717
2718 id = eap_get_identity(sm->eap, &id_len);
2719 if (id)
2720 identity_buf = dup_binstr(id, id_len);
2721 }
2722 ret = os_snprintf(buf + len, buflen - len,
2723 /* TODO: dot1xAuthSessionOctetsRx */
2724 /* TODO: dot1xAuthSessionOctetsTx */
2725 /* TODO: dot1xAuthSessionFramesRx */
2726 /* TODO: dot1xAuthSessionFramesTx */
2727 "dot1xAuthSessionId=%016llX\n"
2728 "dot1xAuthSessionAuthenticMethod=%d\n"
2729 "dot1xAuthSessionTime=%u\n"
2730 "dot1xAuthSessionTerminateCause=999\n"
2731 "dot1xAuthSessionUserName=%s\n",
2732 (unsigned long long) sta->acct_session_id,
2733 (wpa_key_mgmt_wpa_ieee8021x(
2734 wpa_auth_sta_key_mgmt(sta->wpa_sm))) ?
2735 1 : 2,
2736 (unsigned int) diff.sec,
2737 sm->identity ? (char *) sm->identity :
2738 (identity_buf ? identity_buf : "N/A"));
2739 os_free(identity_buf);
2740 if (os_snprintf_error(buflen - len, ret))
2741 return len;
2742 len += ret;
2743
2744 if (sm->acct_multi_session_id) {
2745 ret = os_snprintf(buf + len, buflen - len,
2746 "authMultiSessionId=%016llX\n",
2747 (unsigned long long)
2748 sm->acct_multi_session_id);
2749 if (os_snprintf_error(buflen - len, ret))
2750 return len;
2751 len += ret;
2752 }
2753
2754 name1 = eap_server_get_name(0, sm->eap_type_authsrv);
2755 name2 = eap_server_get_name(0, sm->eap_type_supp);
2756 ret = os_snprintf(buf + len, buflen - len,
2757 "last_eap_type_as=%d (%s)\n"
2758 "last_eap_type_sta=%d (%s)\n",
2759 sm->eap_type_authsrv, name1,
2760 sm->eap_type_supp, name2);
2761 if (os_snprintf_error(buflen - len, ret))
2762 return len;
2763 len += ret;
2764
2765 return len;
2766 }
2767
2768
2769 #ifdef CONFIG_HS20
2770 static void ieee802_1x_wnm_notif_send(void *eloop_ctx, void *timeout_ctx)
2771 {
2772 struct hostapd_data *hapd = eloop_ctx;
2773 struct sta_info *sta = timeout_ctx;
2774
2775 if (sta->remediation) {
2776 wpa_printf(MSG_DEBUG, "HS 2.0: Send WNM-Notification to "
2777 MACSTR " to indicate Subscription Remediation",
2778 MAC2STR(sta->addr));
2779 hs20_send_wnm_notification(hapd, sta->addr,
2780 sta->remediation_method,
2781 sta->remediation_url);
2782 os_free(sta->remediation_url);
2783 sta->remediation_url = NULL;
2784 }
2785
2786 if (sta->hs20_deauth_req) {
2787 wpa_printf(MSG_DEBUG, "HS 2.0: Send WNM-Notification to "
2788 MACSTR " to indicate imminent deauthentication",
2789 MAC2STR(sta->addr));
2790 hs20_send_wnm_notification_deauth_req(hapd, sta->addr,
2791 sta->hs20_deauth_req);
2792 }
2793
2794 if (sta->hs20_t_c_filtering) {
2795 wpa_printf(MSG_DEBUG, "HS 2.0: Send WNM-Notification to "
2796 MACSTR " to indicate Terms and Conditions filtering",
2797 MAC2STR(sta->addr));
2798 hs20_send_wnm_notification_t_c(hapd, sta->addr, sta->t_c_url);
2799 os_free(sta->t_c_url);
2800 sta->t_c_url = NULL;
2801 }
2802 }
2803 #endif /* CONFIG_HS20 */
2804
2805
2806 static void ieee802_1x_finished(struct hostapd_data *hapd,
2807 struct sta_info *sta, int success,
2808 int remediation)
2809 {
2810 const u8 *key;
2811 size_t len;
2812 /* TODO: get PMKLifetime from WPA parameters */
2813 static const int dot11RSNAConfigPMKLifetime = 43200;
2814 unsigned int session_timeout;
2815 struct os_reltime now, remaining;
2816
2817 #ifdef CONFIG_HS20
2818 if (remediation && !sta->remediation) {
2819 sta->remediation = 1;
2820 os_free(sta->remediation_url);
2821 sta->remediation_url =
2822 os_strdup(hapd->conf->subscr_remediation_url);
2823 sta->remediation_method = 1; /* SOAP-XML SPP */
2824 }
2825
2826 if (success && (sta->remediation || sta->hs20_deauth_req ||
2827 sta->hs20_t_c_filtering)) {
2828 wpa_printf(MSG_DEBUG, "HS 2.0: Schedule WNM-Notification to "
2829 MACSTR " in 100 ms", MAC2STR(sta->addr));
2830 eloop_cancel_timeout(ieee802_1x_wnm_notif_send, hapd, sta);
2831 eloop_register_timeout(0, 100000, ieee802_1x_wnm_notif_send,
2832 hapd, sta);
2833 }
2834 #endif /* CONFIG_HS20 */
2835
2836 key = ieee802_1x_get_key(sta->eapol_sm, &len);
2837 if (sta->session_timeout_set) {
2838 os_get_reltime(&now);
2839 os_reltime_sub(&sta->session_timeout, &now, &remaining);
2840 session_timeout = (remaining.sec > 0) ? remaining.sec : 1;
2841 } else {
2842 session_timeout = dot11RSNAConfigPMKLifetime;
2843 }
2844 if (success && key && len >= PMK_LEN && !sta->remediation &&
2845 !sta->hs20_deauth_requested &&
2846 wpa_auth_pmksa_add(sta->wpa_sm, key, len, session_timeout,
2847 sta->eapol_sm) == 0) {
2848 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
2849 HOSTAPD_LEVEL_DEBUG,
2850 "Added PMKSA cache entry (IEEE 802.1X)");
2851 }
2852
2853 if (!success) {
2854 /*
2855 * Many devices require deauthentication after WPS provisioning
2856 * and some may not be be able to do that themselves, so
2857 * disconnect the client here. In addition, this may also
2858 * benefit IEEE 802.1X/EAPOL authentication cases, too since
2859 * the EAPOL PAE state machine would remain in HELD state for
2860 * considerable amount of time and some EAP methods, like
2861 * EAP-FAST with anonymous provisioning, may require another
2862 * EAPOL authentication to be started to complete connection.
2863 */
2864 ap_sta_delayed_1x_auth_fail_disconnect(hapd, sta);
2865 }
2866 }
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