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 void ieee802_1x_finished(struct hostapd_data *hapd,
47 				struct sta_info *sta, int success,
48 				int remediation);
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 		hostapd_drv_hapd_send_eapol(
99 			hapd, sta->addr, buf, len,
100 			encrypt, hostapd_sta_flags_to_drv(sta->flags));
101 	}
102 
103 	os_free(buf);
104 }
105 
106 
ieee802_1x_set_sta_authorized(struct hostapd_data * hapd,struct sta_info * sta,int authorized)107 void ieee802_1x_set_sta_authorized(struct hostapd_data *hapd,
108 				   struct sta_info *sta, int authorized)
109 {
110 	int res;
111 
112 	if (sta->flags & WLAN_STA_PREAUTH)
113 		return;
114 
115 	if (authorized) {
116 		ap_sta_set_authorized(hapd, sta, 1);
117 		res = hostapd_set_authorized(hapd, sta, 1);
118 		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
119 			       HOSTAPD_LEVEL_DEBUG, "authorizing port");
120 	} else {
121 		ap_sta_set_authorized(hapd, sta, 0);
122 		res = hostapd_set_authorized(hapd, sta, 0);
123 		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
124 			       HOSTAPD_LEVEL_DEBUG, "unauthorizing port");
125 	}
126 
127 	if (res && errno != ENOENT) {
128 		wpa_printf(MSG_DEBUG, "Could not set station " MACSTR
129 			   " flags for kernel driver (errno=%d).",
130 			   MAC2STR(sta->addr), errno);
131 	}
132 
133 	if (authorized) {
134 		os_get_reltime(&sta->connected_time);
135 		accounting_sta_start(hapd, sta);
136 	}
137 }
138 
139 
140 #ifdef CONFIG_WEP
141 #ifndef CONFIG_FIPS
142 #ifndef CONFIG_NO_RC4
143 
ieee802_1x_tx_key_one(struct hostapd_data * hapd,struct sta_info * sta,int idx,int broadcast,u8 * key_data,size_t key_len)144 static void ieee802_1x_tx_key_one(struct hostapd_data *hapd,
145 				  struct sta_info *sta,
146 				  int idx, int broadcast,
147 				  u8 *key_data, size_t key_len)
148 {
149 	u8 *buf, *ekey;
150 	struct ieee802_1x_hdr *hdr;
151 	struct ieee802_1x_eapol_key *key;
152 	size_t len, ekey_len;
153 	struct eapol_state_machine *sm = sta->eapol_sm;
154 
155 	if (!sm)
156 		return;
157 
158 	len = sizeof(*key) + key_len;
159 	buf = os_zalloc(sizeof(*hdr) + len);
160 	if (!buf)
161 		return;
162 
163 	hdr = (struct ieee802_1x_hdr *) buf;
164 	key = (struct ieee802_1x_eapol_key *) (hdr + 1);
165 	key->type = EAPOL_KEY_TYPE_RC4;
166 	WPA_PUT_BE16(key->key_length, key_len);
167 	wpa_get_ntp_timestamp(key->replay_counter);
168 	if (os_memcmp(key->replay_counter,
169 		      hapd->last_1x_eapol_key_replay_counter,
170 		      IEEE8021X_REPLAY_COUNTER_LEN) <= 0) {
171 		/* NTP timestamp did not increment from last EAPOL-Key frame;
172 		 * use previously used value + 1 instead. */
173 		inc_byte_array(hapd->last_1x_eapol_key_replay_counter,
174 			       IEEE8021X_REPLAY_COUNTER_LEN);
175 		os_memcpy(key->replay_counter,
176 			  hapd->last_1x_eapol_key_replay_counter,
177 			  IEEE8021X_REPLAY_COUNTER_LEN);
178 	} else {
179 		os_memcpy(hapd->last_1x_eapol_key_replay_counter,
180 			  key->replay_counter,
181 			  IEEE8021X_REPLAY_COUNTER_LEN);
182 	}
183 
184 	if (random_get_bytes(key->key_iv, sizeof(key->key_iv))) {
185 		wpa_printf(MSG_ERROR, "Could not get random numbers");
186 		os_free(buf);
187 		return;
188 	}
189 
190 	key->key_index = idx | (broadcast ? 0 : BIT(7));
191 	if (hapd->conf->eapol_key_index_workaround) {
192 		/* According to some information, WinXP Supplicant seems to
193 		 * interpret bit7 as an indication whether the key is to be
194 		 * activated, so make it possible to enable workaround that
195 		 * sets this bit for all keys. */
196 		key->key_index |= BIT(7);
197 	}
198 
199 	/* Key is encrypted using "Key-IV + MSK[0..31]" as the RC4-key and
200 	 * MSK[32..63] is used to sign the message. */
201 	if (!sm->eap_if->eapKeyData || sm->eap_if->eapKeyDataLen < 64) {
202 		wpa_printf(MSG_ERROR,
203 			   "No eapKeyData available for encrypting and signing EAPOL-Key");
204 		os_free(buf);
205 		return;
206 	}
207 	os_memcpy((u8 *) (key + 1), key_data, key_len);
208 	ekey_len = sizeof(key->key_iv) + 32;
209 	ekey = os_malloc(ekey_len);
210 	if (!ekey) {
211 		wpa_printf(MSG_ERROR, "Could not encrypt key");
212 		os_free(buf);
213 		return;
214 	}
215 	os_memcpy(ekey, key->key_iv, sizeof(key->key_iv));
216 	os_memcpy(ekey + sizeof(key->key_iv), sm->eap_if->eapKeyData, 32);
217 	rc4_skip(ekey, ekey_len, 0, (u8 *) (key + 1), key_len);
218 	os_free(ekey);
219 
220 	/* This header is needed here for HMAC-MD5, but it will be regenerated
221 	 * in ieee802_1x_send() */
222 	hdr->version = hapd->conf->eapol_version;
223 #ifdef CONFIG_MACSEC
224 	if (hdr->version > 2)
225 		hdr->version = 2;
226 #endif /* CONFIG_MACSEC */
227 	hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
228 	hdr->length = host_to_be16(len);
229 	hmac_md5(sm->eap_if->eapKeyData + 32, 32, buf, sizeof(*hdr) + len,
230 		 key->key_signature);
231 
232 	wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key to " MACSTR
233 		   " (%s index=%d)", MAC2STR(sm->addr),
234 		   broadcast ? "broadcast" : "unicast", idx);
235 	ieee802_1x_send(hapd, sta, IEEE802_1X_TYPE_EAPOL_KEY, (u8 *) key, len);
236 	if (sta->eapol_sm)
237 		sta->eapol_sm->dot1xAuthEapolFramesTx++;
238 	os_free(buf);
239 }
240 
241 
ieee802_1x_tx_key(struct hostapd_data * hapd,struct sta_info * sta)242 static void ieee802_1x_tx_key(struct hostapd_data *hapd, struct sta_info *sta)
243 {
244 	struct eapol_authenticator *eapol = hapd->eapol_auth;
245 	struct eapol_state_machine *sm = sta->eapol_sm;
246 
247 	if (!sm || !sm->eap_if->eapKeyData)
248 		return;
249 
250 	wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key(s) to " MACSTR,
251 		   MAC2STR(sta->addr));
252 
253 #ifndef CONFIG_NO_VLAN
254 	if (sta->vlan_id > 0) {
255 		wpa_printf(MSG_ERROR, "Using WEP with vlans is not supported.");
256 		return;
257 	}
258 #endif /* CONFIG_NO_VLAN */
259 
260 	if (eapol->default_wep_key) {
261 		ieee802_1x_tx_key_one(hapd, sta, eapol->default_wep_key_idx, 1,
262 				      eapol->default_wep_key,
263 				      hapd->conf->default_wep_key_len);
264 	}
265 
266 	if (hapd->conf->individual_wep_key_len > 0) {
267 		u8 *ikey;
268 
269 		ikey = os_malloc(hapd->conf->individual_wep_key_len);
270 		if (!ikey ||
271 		    random_get_bytes(ikey, hapd->conf->individual_wep_key_len))
272 		{
273 			wpa_printf(MSG_ERROR,
274 				   "Could not generate random individual WEP key");
275 			os_free(ikey);
276 			return;
277 		}
278 
279 		wpa_hexdump_key(MSG_DEBUG, "Individual WEP key",
280 				ikey, hapd->conf->individual_wep_key_len);
281 
282 		ieee802_1x_tx_key_one(hapd, sta, 0, 0, ikey,
283 				      hapd->conf->individual_wep_key_len);
284 
285 		/* TODO: set encryption in TX callback, i.e., only after STA
286 		 * has ACKed EAPOL-Key frame */
287 		if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
288 					sta->addr, 0, 0, 1, NULL, 0, ikey,
289 					hapd->conf->individual_wep_key_len,
290 					KEY_FLAG_PAIRWISE_RX_TX)) {
291 			wpa_printf(MSG_ERROR,
292 				   "Could not set individual WEP encryption");
293 		}
294 
295 		os_free(ikey);
296 	}
297 }
298 
299 #endif /* CONFIG_NO_RC4 */
300 #endif /* CONFIG_FIPS */
301 #endif /* CONFIG_WEP */
302 
303 
radius_mode_txt(struct hostapd_data * hapd)304 const char *radius_mode_txt(struct hostapd_data *hapd)
305 {
306 	switch (hapd->iface->conf->hw_mode) {
307 	case HOSTAPD_MODE_IEEE80211AD:
308 		return "802.11ad";
309 	case HOSTAPD_MODE_IEEE80211A:
310 		return "802.11a";
311 	case HOSTAPD_MODE_IEEE80211G:
312 		return "802.11g";
313 	case HOSTAPD_MODE_IEEE80211B:
314 	default:
315 		return "802.11b";
316 	}
317 }
318 
319 
radius_sta_rate(struct hostapd_data * hapd,struct sta_info * sta)320 int radius_sta_rate(struct hostapd_data *hapd, struct sta_info *sta)
321 {
322 	int i;
323 	u8 rate = 0;
324 
325 	for (i = 0; i < sta->supported_rates_len; i++)
326 		if ((sta->supported_rates[i] & 0x7f) > rate)
327 			rate = sta->supported_rates[i] & 0x7f;
328 
329 	return rate;
330 }
331 
332 
333 #ifndef CONFIG_NO_RADIUS
ieee802_1x_learn_identity(struct hostapd_data * hapd,struct eapol_state_machine * sm,const u8 * eap,size_t len)334 static void ieee802_1x_learn_identity(struct hostapd_data *hapd,
335 				      struct eapol_state_machine *sm,
336 				      const u8 *eap, size_t len)
337 {
338 	const u8 *identity;
339 	size_t identity_len;
340 	const struct eap_hdr *hdr = (const struct eap_hdr *) eap;
341 
342 	if (len <= sizeof(struct eap_hdr) ||
343 	    (hdr->code == EAP_CODE_RESPONSE &&
344 	     eap[sizeof(struct eap_hdr)] != EAP_TYPE_IDENTITY) ||
345 	    (hdr->code == EAP_CODE_INITIATE &&
346 	     eap[sizeof(struct eap_hdr)] != EAP_ERP_TYPE_REAUTH) ||
347 	    (hdr->code != EAP_CODE_RESPONSE &&
348 	     hdr->code != EAP_CODE_INITIATE))
349 		return;
350 
351 	eap_erp_update_identity(sm->eap, eap, len);
352 	identity = eap_get_identity(sm->eap, &identity_len);
353 	if (!identity)
354 		return;
355 
356 	/* Save station identity for future RADIUS packets */
357 	os_free(sm->identity);
358 	sm->identity = (u8 *) dup_binstr(identity, identity_len);
359 	if (!sm->identity) {
360 		sm->identity_len = 0;
361 		return;
362 	}
363 
364 	sm->identity_len = identity_len;
365 	hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
366 		       HOSTAPD_LEVEL_DEBUG, "STA identity '%s'", sm->identity);
367 	sm->dot1xAuthEapolRespIdFramesRx++;
368 }
369 
370 
add_common_radius_sta_attr_rsn(struct hostapd_data * hapd,struct hostapd_radius_attr * req_attr,struct sta_info * sta,struct radius_msg * msg)371 static int add_common_radius_sta_attr_rsn(struct hostapd_data *hapd,
372 					  struct hostapd_radius_attr *req_attr,
373 					  struct sta_info *sta,
374 					  struct radius_msg *msg)
375 {
376 	u32 suite;
377 	int ver, val;
378 
379 	ver = wpa_auth_sta_wpa_version(sta->wpa_sm);
380 	val = wpa_auth_get_pairwise(sta->wpa_sm);
381 	suite = wpa_cipher_to_suite(ver, val);
382 	if (val != -1 &&
383 	    !hostapd_config_get_radius_attr(req_attr,
384 					    RADIUS_ATTR_WLAN_PAIRWISE_CIPHER) &&
385 	    !radius_msg_add_attr_int32(msg, RADIUS_ATTR_WLAN_PAIRWISE_CIPHER,
386 				       suite)) {
387 		wpa_printf(MSG_ERROR, "Could not add WLAN-Pairwise-Cipher");
388 		return -1;
389 	}
390 
391 	suite = wpa_cipher_to_suite(((hapd->conf->wpa & 0x2) ||
392 				     hapd->conf->osen) ?
393 				    WPA_PROTO_RSN : WPA_PROTO_WPA,
394 				    hapd->conf->wpa_group);
395 	if (!hostapd_config_get_radius_attr(req_attr,
396 					    RADIUS_ATTR_WLAN_GROUP_CIPHER) &&
397 	    !radius_msg_add_attr_int32(msg, RADIUS_ATTR_WLAN_GROUP_CIPHER,
398 				       suite)) {
399 		wpa_printf(MSG_ERROR, "Could not add WLAN-Group-Cipher");
400 		return -1;
401 	}
402 
403 	val = wpa_auth_sta_key_mgmt(sta->wpa_sm);
404 	suite = wpa_akm_to_suite(val);
405 	if (val != -1 &&
406 	    !hostapd_config_get_radius_attr(req_attr,
407 					    RADIUS_ATTR_WLAN_AKM_SUITE) &&
408 	    !radius_msg_add_attr_int32(msg, RADIUS_ATTR_WLAN_AKM_SUITE,
409 				       suite)) {
410 		wpa_printf(MSG_ERROR, "Could not add WLAN-AKM-Suite");
411 		return -1;
412 	}
413 
414 	if (hapd->conf->ieee80211w != NO_MGMT_FRAME_PROTECTION) {
415 		suite = wpa_cipher_to_suite(WPA_PROTO_RSN,
416 					    hapd->conf->group_mgmt_cipher);
417 		if (!hostapd_config_get_radius_attr(
418 			    req_attr, RADIUS_ATTR_WLAN_GROUP_MGMT_CIPHER) &&
419 		    !radius_msg_add_attr_int32(
420 			    msg, RADIUS_ATTR_WLAN_GROUP_MGMT_CIPHER, suite)) {
421 			wpa_printf(MSG_ERROR,
422 				   "Could not add WLAN-Group-Mgmt-Cipher");
423 			return -1;
424 		}
425 	}
426 
427 	return 0;
428 }
429 
430 
add_common_radius_sta_attr(struct hostapd_data * hapd,struct hostapd_radius_attr * req_attr,struct sta_info * sta,struct radius_msg * msg)431 static int add_common_radius_sta_attr(struct hostapd_data *hapd,
432 				      struct hostapd_radius_attr *req_attr,
433 				      struct sta_info *sta,
434 				      struct radius_msg *msg)
435 {
436 	char buf[128];
437 
438 	if (!hostapd_config_get_radius_attr(req_attr,
439 					    RADIUS_ATTR_SERVICE_TYPE) &&
440 	    !radius_msg_add_attr_int32(msg, RADIUS_ATTR_SERVICE_TYPE,
441 				       RADIUS_SERVICE_TYPE_FRAMED)) {
442 		wpa_printf(MSG_ERROR, "Could not add Service-Type");
443 		return -1;
444 	}
445 
446 	if (!hostapd_config_get_radius_attr(req_attr,
447 					    RADIUS_ATTR_NAS_PORT) &&
448 	    sta->aid > 0 &&
449 	    !radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT, sta->aid)) {
450 		wpa_printf(MSG_ERROR, "Could not add NAS-Port");
451 		return -1;
452 	}
453 
454 	os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
455 		    MAC2STR(sta->addr));
456 	buf[sizeof(buf) - 1] = '\0';
457 	if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID,
458 				 (u8 *) buf, os_strlen(buf))) {
459 		wpa_printf(MSG_ERROR, "Could not add Calling-Station-Id");
460 		return -1;
461 	}
462 
463 	if (sta->flags & WLAN_STA_PREAUTH) {
464 		os_strlcpy(buf, "IEEE 802.11i Pre-Authentication",
465 			   sizeof(buf));
466 	} else {
467 		os_snprintf(buf, sizeof(buf), "CONNECT %d%sMbps %s",
468 			    radius_sta_rate(hapd, sta) / 2,
469 			    (radius_sta_rate(hapd, sta) & 1) ? ".5" : "",
470 			    radius_mode_txt(hapd));
471 		buf[sizeof(buf) - 1] = '\0';
472 	}
473 	if (!hostapd_config_get_radius_attr(req_attr,
474 					    RADIUS_ATTR_CONNECT_INFO) &&
475 	    !radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO,
476 				 (u8 *) buf, os_strlen(buf))) {
477 		wpa_printf(MSG_ERROR, "Could not add Connect-Info");
478 		return -1;
479 	}
480 
481 	if (sta->acct_session_id) {
482 		os_snprintf(buf, sizeof(buf), "%016llX",
483 			    (unsigned long long) sta->acct_session_id);
484 		if (!radius_msg_add_attr(msg, RADIUS_ATTR_ACCT_SESSION_ID,
485 					 (u8 *) buf, os_strlen(buf))) {
486 			wpa_printf(MSG_ERROR, "Could not add Acct-Session-Id");
487 			return -1;
488 		}
489 	}
490 
491 	if ((hapd->conf->wpa & 2) &&
492 	    !hapd->conf->disable_pmksa_caching &&
493 	    sta->eapol_sm && sta->eapol_sm->acct_multi_session_id) {
494 		os_snprintf(buf, sizeof(buf), "%016llX",
495 			    (unsigned long long)
496 			    sta->eapol_sm->acct_multi_session_id);
497 		if (!radius_msg_add_attr(
498 			    msg, RADIUS_ATTR_ACCT_MULTI_SESSION_ID,
499 			    (u8 *) buf, os_strlen(buf))) {
500 			wpa_printf(MSG_INFO,
501 				   "Could not add Acct-Multi-Session-Id");
502 			return -1;
503 		}
504 	}
505 
506 #ifdef CONFIG_IEEE80211R_AP
507 	if (hapd->conf->wpa && wpa_key_mgmt_ft(hapd->conf->wpa_key_mgmt) &&
508 	    sta->wpa_sm &&
509 	    (wpa_key_mgmt_ft(wpa_auth_sta_key_mgmt(sta->wpa_sm)) ||
510 	     sta->auth_alg == WLAN_AUTH_FT) &&
511 	    !hostapd_config_get_radius_attr(req_attr,
512 					    RADIUS_ATTR_MOBILITY_DOMAIN_ID) &&
513 	    !radius_msg_add_attr_int32(msg, RADIUS_ATTR_MOBILITY_DOMAIN_ID,
514 				       WPA_GET_BE16(
515 					       hapd->conf->mobility_domain))) {
516 		wpa_printf(MSG_ERROR, "Could not add Mobility-Domain-Id");
517 		return -1;
518 	}
519 #endif /* CONFIG_IEEE80211R_AP */
520 
521 	if ((hapd->conf->wpa || hapd->conf->osen) && sta->wpa_sm &&
522 	    add_common_radius_sta_attr_rsn(hapd, req_attr, sta, msg) < 0)
523 		return -1;
524 
525 	return 0;
526 }
527 
528 
add_common_radius_attr(struct hostapd_data * hapd,struct hostapd_radius_attr * req_attr,struct sta_info * sta,struct radius_msg * msg)529 int add_common_radius_attr(struct hostapd_data *hapd,
530 			   struct hostapd_radius_attr *req_attr,
531 			   struct sta_info *sta,
532 			   struct radius_msg *msg)
533 {
534 	char buf[128];
535 	struct hostapd_radius_attr *attr;
536 	int len;
537 
538 	if (!hostapd_config_get_radius_attr(req_attr,
539 					    RADIUS_ATTR_NAS_IP_ADDRESS) &&
540 	    hapd->conf->own_ip_addr.af == AF_INET &&
541 	    !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS,
542 				 (u8 *) &hapd->conf->own_ip_addr.u.v4, 4)) {
543 		wpa_printf(MSG_ERROR, "Could not add NAS-IP-Address");
544 		return -1;
545 	}
546 
547 #ifdef CONFIG_IPV6
548 	if (!hostapd_config_get_radius_attr(req_attr,
549 					    RADIUS_ATTR_NAS_IPV6_ADDRESS) &&
550 	    hapd->conf->own_ip_addr.af == AF_INET6 &&
551 	    !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IPV6_ADDRESS,
552 				 (u8 *) &hapd->conf->own_ip_addr.u.v6, 16)) {
553 		wpa_printf(MSG_ERROR, "Could not add NAS-IPv6-Address");
554 		return -1;
555 	}
556 #endif /* CONFIG_IPV6 */
557 
558 	if (!hostapd_config_get_radius_attr(req_attr,
559 					    RADIUS_ATTR_NAS_IDENTIFIER) &&
560 	    hapd->conf->nas_identifier &&
561 	    !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IDENTIFIER,
562 				 (u8 *) hapd->conf->nas_identifier,
563 				 os_strlen(hapd->conf->nas_identifier))) {
564 		wpa_printf(MSG_ERROR, "Could not add NAS-Identifier");
565 		return -1;
566 	}
567 
568 	len = os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT ":",
569 			  MAC2STR(hapd->own_addr));
570 	os_memcpy(&buf[len], hapd->conf->ssid.ssid,
571 		  hapd->conf->ssid.ssid_len);
572 	len += hapd->conf->ssid.ssid_len;
573 	if (!hostapd_config_get_radius_attr(req_attr,
574 					    RADIUS_ATTR_CALLED_STATION_ID) &&
575 	    !radius_msg_add_attr(msg, RADIUS_ATTR_CALLED_STATION_ID,
576 				 (u8 *) buf, len)) {
577 		wpa_printf(MSG_ERROR, "Could not add Called-Station-Id");
578 		return -1;
579 	}
580 
581 	if (!hostapd_config_get_radius_attr(req_attr,
582 					    RADIUS_ATTR_NAS_PORT_TYPE) &&
583 	    !radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT_TYPE,
584 				       RADIUS_NAS_PORT_TYPE_IEEE_802_11)) {
585 		wpa_printf(MSG_ERROR, "Could not add NAS-Port-Type");
586 		return -1;
587 	}
588 
589 #ifdef CONFIG_INTERWORKING
590 	if (hapd->conf->interworking &&
591 	    !is_zero_ether_addr(hapd->conf->hessid)) {
592 		os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
593 			    MAC2STR(hapd->conf->hessid));
594 		buf[sizeof(buf) - 1] = '\0';
595 		if (!hostapd_config_get_radius_attr(req_attr,
596 						    RADIUS_ATTR_WLAN_HESSID) &&
597 		    !radius_msg_add_attr(msg, RADIUS_ATTR_WLAN_HESSID,
598 					 (u8 *) buf, os_strlen(buf))) {
599 			wpa_printf(MSG_ERROR, "Could not add WLAN-HESSID");
600 			return -1;
601 		}
602 	}
603 #endif /* CONFIG_INTERWORKING */
604 
605 	if (sta && add_common_radius_sta_attr(hapd, req_attr, sta, msg) < 0)
606 		return -1;
607 
608 	for (attr = req_attr; attr; attr = attr->next) {
609 		if (!radius_msg_add_attr(msg, attr->type,
610 					 wpabuf_head(attr->val),
611 					 wpabuf_len(attr->val))) {
612 			wpa_printf(MSG_ERROR, "Could not add RADIUS attribute");
613 			return -1;
614 		}
615 	}
616 
617 	return 0;
618 }
619 
620 
add_sqlite_radius_attr(struct hostapd_data * hapd,struct sta_info * sta,struct radius_msg * msg,int acct)621 int add_sqlite_radius_attr(struct hostapd_data *hapd, struct sta_info *sta,
622 			   struct radius_msg *msg, int acct)
623 {
624 #ifdef CONFIG_SQLITE
625 	const char *attrtxt;
626 	char addrtxt[3 * ETH_ALEN];
627 	char *sql;
628 	sqlite3_stmt *stmt = NULL;
629 
630 	if (!hapd->rad_attr_db)
631 		return 0;
632 
633 	os_snprintf(addrtxt, sizeof(addrtxt), MACSTR, MAC2STR(sta->addr));
634 
635 	sql = "SELECT attr FROM radius_attributes WHERE sta=? AND (reqtype=? OR reqtype IS NULL);";
636 	if (sqlite3_prepare_v2(hapd->rad_attr_db, sql, os_strlen(sql), &stmt,
637 			       NULL) != SQLITE_OK) {
638 		wpa_printf(MSG_ERROR, "DB: Failed to prepare SQL statement: %s",
639 			   sqlite3_errmsg(hapd->rad_attr_db));
640 		return -1;
641 	}
642 	sqlite3_bind_text(stmt, 1, addrtxt, os_strlen(addrtxt), SQLITE_STATIC);
643 	sqlite3_bind_text(stmt, 2, acct ? "acct" : "auth", 4, SQLITE_STATIC);
644 	while (sqlite3_step(stmt) == SQLITE_ROW) {
645 		struct hostapd_radius_attr *attr;
646 		struct radius_attr_hdr *hdr;
647 
648 		attrtxt = (const char *) sqlite3_column_text(stmt, 0);
649 		attr = hostapd_parse_radius_attr(attrtxt);
650 		if (!attr) {
651 			wpa_printf(MSG_ERROR,
652 				   "Skipping invalid attribute from SQL: %s",
653 				   attrtxt);
654 			continue;
655 		}
656 		wpa_printf(MSG_DEBUG, "Adding RADIUS attribute from SQL: %s",
657 			   attrtxt);
658 		hdr = radius_msg_add_attr(msg, attr->type,
659 					  wpabuf_head(attr->val),
660 					  wpabuf_len(attr->val));
661 		hostapd_config_free_radius_attr(attr);
662 		if (!hdr) {
663 			wpa_printf(MSG_ERROR,
664 				   "Could not add RADIUS attribute from SQL");
665 			continue;
666 		}
667 	}
668 
669 	sqlite3_reset(stmt);
670 	sqlite3_clear_bindings(stmt);
671 	sqlite3_finalize(stmt);
672 #endif /* CONFIG_SQLITE */
673 
674 	return 0;
675 }
676 
677 
ieee802_1x_encapsulate_radius(struct hostapd_data * hapd,struct sta_info * sta,const u8 * eap,size_t len)678 void ieee802_1x_encapsulate_radius(struct hostapd_data *hapd,
679 				   struct sta_info *sta,
680 				   const u8 *eap, size_t len)
681 {
682 	struct radius_msg *msg;
683 	struct eapol_state_machine *sm = sta->eapol_sm;
684 
685 	if (!sm)
686 		return;
687 
688 	ieee802_1x_learn_identity(hapd, sm, eap, len);
689 
690 	wpa_printf(MSG_DEBUG, "Encapsulating EAP message into a RADIUS packet");
691 
692 	sm->radius_identifier = radius_client_get_id(hapd->radius);
693 	msg = radius_msg_new(RADIUS_CODE_ACCESS_REQUEST,
694 			     sm->radius_identifier);
695 	if (!msg) {
696 		wpa_printf(MSG_INFO, "Could not create new RADIUS packet");
697 		return;
698 	}
699 
700 	if (radius_msg_make_authenticator(msg) < 0) {
701 		wpa_printf(MSG_INFO, "Could not make Request Authenticator");
702 		goto fail;
703 	}
704 
705 	if (sm->identity &&
706 	    !radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME,
707 				 sm->identity, sm->identity_len)) {
708 		wpa_printf(MSG_INFO, "Could not add User-Name");
709 		goto fail;
710 	}
711 
712 	if (add_common_radius_attr(hapd, hapd->conf->radius_auth_req_attr, sta,
713 				   msg) < 0)
714 		goto fail;
715 
716 	if (sta && add_sqlite_radius_attr(hapd, sta, msg, 0) < 0)
717 		goto fail;
718 
719 	/* TODO: should probably check MTU from driver config; 2304 is max for
720 	 * IEEE 802.11, but use 1400 to avoid problems with too large packets
721 	 */
722 	if (!hostapd_config_get_radius_attr(hapd->conf->radius_auth_req_attr,
723 					    RADIUS_ATTR_FRAMED_MTU) &&
724 	    !radius_msg_add_attr_int32(msg, RADIUS_ATTR_FRAMED_MTU, 1400)) {
725 		wpa_printf(MSG_INFO, "Could not add Framed-MTU");
726 		goto fail;
727 	}
728 
729 	if (!radius_msg_add_eap(msg, eap, len)) {
730 		wpa_printf(MSG_INFO, "Could not add EAP-Message");
731 		goto fail;
732 	}
733 
734 	/* State attribute must be copied if and only if this packet is
735 	 * Access-Request reply to the previous Access-Challenge */
736 	if (sm->last_recv_radius &&
737 	    radius_msg_get_hdr(sm->last_recv_radius)->code ==
738 	    RADIUS_CODE_ACCESS_CHALLENGE) {
739 		int res = radius_msg_copy_attr(msg, sm->last_recv_radius,
740 					       RADIUS_ATTR_STATE);
741 		if (res < 0) {
742 			wpa_printf(MSG_INFO,
743 				   "Could not copy State attribute from previous Access-Challenge");
744 			goto fail;
745 		}
746 		if (res > 0)
747 			wpa_printf(MSG_DEBUG, "Copied RADIUS State Attribute");
748 	}
749 
750 	if (hapd->conf->radius_request_cui) {
751 		const u8 *cui;
752 		size_t cui_len;
753 		/* Add previously learned CUI or nul CUI to request CUI */
754 		if (sm->radius_cui) {
755 			cui = wpabuf_head(sm->radius_cui);
756 			cui_len = wpabuf_len(sm->radius_cui);
757 		} else {
758 			cui = (const u8 *) "\0";
759 			cui_len = 1;
760 		}
761 		if (!radius_msg_add_attr(msg,
762 					 RADIUS_ATTR_CHARGEABLE_USER_IDENTITY,
763 					 cui, cui_len)) {
764 			wpa_printf(MSG_ERROR, "Could not add CUI");
765 			goto fail;
766 		}
767 	}
768 
769 #ifdef CONFIG_HS20
770 	if (hapd->conf->hs20) {
771 		u8 ver = hapd->conf->hs20_release - 1;
772 
773 		if (!radius_msg_add_wfa(
774 			    msg, RADIUS_VENDOR_ATTR_WFA_HS20_AP_VERSION,
775 			    &ver, 1)) {
776 			wpa_printf(MSG_ERROR,
777 				   "Could not add HS 2.0 AP version");
778 			goto fail;
779 		}
780 
781 		if (sta->hs20_ie && wpabuf_len(sta->hs20_ie) > 0) {
782 			const u8 *pos;
783 			u8 buf[3];
784 			u16 id;
785 
786 			pos = wpabuf_head_u8(sta->hs20_ie);
787 			buf[0] = (*pos) >> 4;
788 			if (((*pos) & HS20_PPS_MO_ID_PRESENT) &&
789 			    wpabuf_len(sta->hs20_ie) >= 3)
790 				id = WPA_GET_LE16(pos + 1);
791 			else
792 				id = 0;
793 			WPA_PUT_BE16(buf + 1, id);
794 			if (!radius_msg_add_wfa(
795 				    msg,
796 				    RADIUS_VENDOR_ATTR_WFA_HS20_STA_VERSION,
797 				    buf, sizeof(buf))) {
798 				wpa_printf(MSG_ERROR,
799 					   "Could not add HS 2.0 STA version");
800 				goto fail;
801 			}
802 		}
803 
804 		if (sta->roaming_consortium &&
805 		    !radius_msg_add_wfa(
806 			    msg, RADIUS_VENDOR_ATTR_WFA_HS20_ROAMING_CONSORTIUM,
807 			    wpabuf_head(sta->roaming_consortium),
808 			    wpabuf_len(sta->roaming_consortium))) {
809 			wpa_printf(MSG_ERROR,
810 				   "Could not add HS 2.0 Roaming Consortium");
811 			goto fail;
812 		}
813 
814 		if (hapd->conf->t_c_filename) {
815 			be32 timestamp;
816 
817 			if (!radius_msg_add_wfa(
818 				    msg,
819 				    RADIUS_VENDOR_ATTR_WFA_HS20_T_C_FILENAME,
820 				    (const u8 *) hapd->conf->t_c_filename,
821 				    os_strlen(hapd->conf->t_c_filename))) {
822 				wpa_printf(MSG_ERROR,
823 					   "Could not add HS 2.0 T&C Filename");
824 				goto fail;
825 			}
826 
827 			timestamp = host_to_be32(hapd->conf->t_c_timestamp);
828 			if (!radius_msg_add_wfa(
829 				    msg,
830 				    RADIUS_VENDOR_ATTR_WFA_HS20_TIMESTAMP,
831 				    (const u8 *) &timestamp,
832 				    sizeof(timestamp))) {
833 				wpa_printf(MSG_ERROR,
834 					   "Could not add HS 2.0 Timestamp");
835 				goto fail;
836 			}
837 		}
838 	}
839 #endif /* CONFIG_HS20 */
840 
841 	if (radius_client_send(hapd->radius, msg, RADIUS_AUTH, sta->addr) < 0)
842 		goto fail;
843 
844 	return;
845 
846  fail:
847 	radius_msg_free(msg);
848 }
849 #endif /* CONFIG_NO_RADIUS */
850 
851 
handle_eap_response(struct hostapd_data * hapd,struct sta_info * sta,struct eap_hdr * eap,size_t len)852 static void handle_eap_response(struct hostapd_data *hapd,
853 				struct sta_info *sta, struct eap_hdr *eap,
854 				size_t len)
855 {
856 	u8 type, *data;
857 	struct eapol_state_machine *sm = sta->eapol_sm;
858 
859 	if (!sm)
860 		return;
861 
862 	data = (u8 *) (eap + 1);
863 
864 	if (len < sizeof(*eap) + 1) {
865 		wpa_printf(MSG_INFO, "%s: too short response data", __func__);
866 		return;
867 	}
868 
869 	sm->eap_type_supp = type = data[0];
870 
871 	hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
872 		       HOSTAPD_LEVEL_DEBUG, "received EAP packet (code=%d "
873 		       "id=%d len=%d) from STA: EAP Response-%s (%d)",
874 		       eap->code, eap->identifier, be_to_host16(eap->length),
875 		       eap_server_get_name(0, type), type);
876 
877 	sm->dot1xAuthEapolRespFramesRx++;
878 
879 	wpabuf_free(sm->eap_if->eapRespData);
880 	sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len);
881 	sm->eapolEap = true;
882 }
883 
884 
handle_eap_initiate(struct hostapd_data * hapd,struct sta_info * sta,struct eap_hdr * eap,size_t len)885 static void handle_eap_initiate(struct hostapd_data *hapd,
886 				struct sta_info *sta, struct eap_hdr *eap,
887 				size_t len)
888 {
889 #ifdef CONFIG_ERP
890 	u8 type, *data;
891 	struct eapol_state_machine *sm = sta->eapol_sm;
892 
893 	if (!sm)
894 		return;
895 
896 	if (len < sizeof(*eap) + 1) {
897 		wpa_printf(MSG_INFO, "%s: too short response data", __func__);
898 		return;
899 	}
900 
901 	data = (u8 *) (eap + 1);
902 	type = data[0];
903 
904 	hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
905 		       HOSTAPD_LEVEL_DEBUG,
906 		       "received EAP packet (code=%d id=%d len=%d) from STA: EAP Initiate type %u",
907 		       eap->code, eap->identifier, be_to_host16(eap->length),
908 		       type);
909 
910 	wpabuf_free(sm->eap_if->eapRespData);
911 	sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len);
912 	sm->eapolEap = true;
913 #endif /* CONFIG_ERP */
914 }
915 
916 
917 #ifndef CONFIG_NO_STDOUT_DEBUG
eap_code_str(u8 code)918 static const char * eap_code_str(u8 code)
919 {
920 	switch (code) {
921 	case EAP_CODE_REQUEST:
922 		return "request";
923 	case EAP_CODE_RESPONSE:
924 		return "response";
925 	case EAP_CODE_SUCCESS:
926 		return "success";
927 	case EAP_CODE_FAILURE:
928 		return "failure";
929 	case EAP_CODE_INITIATE:
930 		return "initiate";
931 	case EAP_CODE_FINISH:
932 		return "finish";
933 	default:
934 		return "unknown";
935 	}
936 }
937 #endif /* CONFIG_NO_STDOUT_DEBUG */
938 
939 
940 /* Process incoming EAP packet from Supplicant */
handle_eap(struct hostapd_data * hapd,struct sta_info * sta,u8 * buf,size_t len)941 static void handle_eap(struct hostapd_data *hapd, struct sta_info *sta,
942 		       u8 *buf, size_t len)
943 {
944 	struct eap_hdr *eap;
945 	u16 eap_len;
946 
947 	if (len < sizeof(*eap)) {
948 		wpa_printf(MSG_INFO, "   too short EAP packet");
949 		return;
950 	}
951 
952 	eap = (struct eap_hdr *) buf;
953 
954 	eap_len = be_to_host16(eap->length);
955 	wpa_printf(MSG_DEBUG, "EAP: code=%d (%s) identifier=%d length=%d",
956 		   eap->code, eap_code_str(eap->code), eap->identifier,
957 		   eap_len);
958 	if (eap_len < sizeof(*eap)) {
959 		wpa_printf(MSG_DEBUG, "   Invalid EAP length");
960 		return;
961 	} else if (eap_len > len) {
962 		wpa_printf(MSG_DEBUG,
963 			   "   Too short frame to contain this EAP packet");
964 		return;
965 	} else if (eap_len < len) {
966 		wpa_printf(MSG_DEBUG,
967 			   "   Ignoring %lu extra bytes after EAP packet",
968 			   (unsigned long) len - eap_len);
969 	}
970 
971 	switch (eap->code) {
972 	case EAP_CODE_RESPONSE:
973 		handle_eap_response(hapd, sta, eap, eap_len);
974 		break;
975 	case EAP_CODE_INITIATE:
976 		handle_eap_initiate(hapd, sta, eap, eap_len);
977 		break;
978 	}
979 }
980 
981 
982 struct eapol_state_machine *
ieee802_1x_alloc_eapol_sm(struct hostapd_data * hapd,struct sta_info * sta)983 ieee802_1x_alloc_eapol_sm(struct hostapd_data *hapd, struct sta_info *sta)
984 {
985 	int flags = 0;
986 
987 	if (sta->flags & WLAN_STA_PREAUTH)
988 		flags |= EAPOL_SM_PREAUTH;
989 	if (sta->wpa_sm) {
990 		flags |= EAPOL_SM_USES_WPA;
991 		if (wpa_auth_sta_get_pmksa(sta->wpa_sm))
992 			flags |= EAPOL_SM_FROM_PMKSA_CACHE;
993 	}
994 	return eapol_auth_alloc(hapd->eapol_auth, sta->addr, flags,
995 				sta->wps_ie, sta->p2p_ie, sta,
996 				sta->identity, sta->radius_cui);
997 }
998 
999 
ieee802_1x_save_eapol(struct sta_info * sta,const u8 * buf,size_t len)1000 static void ieee802_1x_save_eapol(struct sta_info *sta, const u8 *buf,
1001 				  size_t len)
1002 {
1003 	if (sta->pending_eapol_rx) {
1004 		wpabuf_free(sta->pending_eapol_rx->buf);
1005 	} else {
1006 		sta->pending_eapol_rx =
1007 			os_malloc(sizeof(*sta->pending_eapol_rx));
1008 		if (!sta->pending_eapol_rx)
1009 			return;
1010 	}
1011 
1012 	sta->pending_eapol_rx->buf = wpabuf_alloc_copy(buf, len);
1013 	if (!sta->pending_eapol_rx->buf) {
1014 		os_free(sta->pending_eapol_rx);
1015 		sta->pending_eapol_rx = NULL;
1016 		return;
1017 	}
1018 
1019 	os_get_reltime(&sta->pending_eapol_rx->rx_time);
1020 }
1021 
1022 
1023 /**
1024  * ieee802_1x_receive - Process the EAPOL frames from the Supplicant
1025  * @hapd: hostapd BSS data
1026  * @sa: Source address (sender of the EAPOL frame)
1027  * @buf: EAPOL frame
1028  * @len: Length of buf in octets
1029  *
1030  * This function is called for each incoming EAPOL frame from the interface
1031  */
ieee802_1x_receive(struct hostapd_data * hapd,const u8 * sa,const u8 * buf,size_t len)1032 void ieee802_1x_receive(struct hostapd_data *hapd, const u8 *sa, const u8 *buf,
1033 			size_t len)
1034 {
1035 	struct sta_info *sta;
1036 	struct ieee802_1x_hdr *hdr;
1037 	struct ieee802_1x_eapol_key *key;
1038 	u16 datalen;
1039 	struct rsn_pmksa_cache_entry *pmksa;
1040 	int key_mgmt;
1041 
1042 	if (!hapd->conf->ieee802_1x && !hapd->conf->wpa && !hapd->conf->osen &&
1043 	    !hapd->conf->wps_state)
1044 		return;
1045 
1046 	wpa_printf(MSG_DEBUG, "IEEE 802.1X: %lu bytes from " MACSTR,
1047 		   (unsigned long) len, MAC2STR(sa));
1048 	sta = ap_get_sta(hapd, sa);
1049 	if (!sta || (!(sta->flags & (WLAN_STA_ASSOC | WLAN_STA_PREAUTH)) &&
1050 		     !(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_WIRED))) {
1051 		wpa_printf(MSG_DEBUG,
1052 			   "IEEE 802.1X data frame from not associated/Pre-authenticating STA");
1053 
1054 		if (sta && (sta->flags & WLAN_STA_AUTH)) {
1055 			wpa_printf(MSG_DEBUG, "Saving EAPOL frame from " MACSTR
1056 				   " for later use", MAC2STR(sta->addr));
1057 			ieee802_1x_save_eapol(sta, buf, len);
1058 		}
1059 
1060 		return;
1061 	}
1062 
1063 	if (len < sizeof(*hdr)) {
1064 		wpa_printf(MSG_INFO, "   too short IEEE 802.1X packet");
1065 		return;
1066 	}
1067 
1068 	hdr = (struct ieee802_1x_hdr *) buf;
1069 	datalen = be_to_host16(hdr->length);
1070 	wpa_printf(MSG_DEBUG, "   IEEE 802.1X: version=%d type=%d length=%d",
1071 		   hdr->version, hdr->type, datalen);
1072 
1073 	if (len - sizeof(*hdr) < datalen) {
1074 		wpa_printf(MSG_INFO,
1075 			   "   frame too short for this IEEE 802.1X packet");
1076 		if (sta->eapol_sm)
1077 			sta->eapol_sm->dot1xAuthEapLengthErrorFramesRx++;
1078 		return;
1079 	}
1080 	if (len - sizeof(*hdr) > datalen) {
1081 		wpa_printf(MSG_DEBUG,
1082 			   "   ignoring %lu extra octets after IEEE 802.1X packet",
1083 			   (unsigned long) len - sizeof(*hdr) - datalen);
1084 	}
1085 
1086 	if (sta->eapol_sm) {
1087 		sta->eapol_sm->dot1xAuthLastEapolFrameVersion = hdr->version;
1088 		sta->eapol_sm->dot1xAuthEapolFramesRx++;
1089 	}
1090 
1091 	key = (struct ieee802_1x_eapol_key *) (hdr + 1);
1092 	if (datalen >= sizeof(struct ieee802_1x_eapol_key) &&
1093 	    hdr->type == IEEE802_1X_TYPE_EAPOL_KEY &&
1094 	    (key->type == EAPOL_KEY_TYPE_WPA ||
1095 	     key->type == EAPOL_KEY_TYPE_RSN)) {
1096 		wpa_receive(hapd->wpa_auth, sta->wpa_sm, (u8 *) hdr,
1097 			    sizeof(*hdr) + datalen);
1098 		return;
1099 	}
1100 
1101 	if (!hapd->conf->ieee802_1x && !hapd->conf->osen &&
1102 	    !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) {
1103 		wpa_printf(MSG_DEBUG,
1104 			   "IEEE 802.1X: Ignore EAPOL message - 802.1X not enabled and WPS not used");
1105 		return;
1106 	}
1107 
1108 	key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm);
1109 	if (key_mgmt != -1 &&
1110 	    (wpa_key_mgmt_wpa_psk(key_mgmt) || key_mgmt == WPA_KEY_MGMT_OWE ||
1111 	     key_mgmt == WPA_KEY_MGMT_DPP)) {
1112 		wpa_printf(MSG_DEBUG,
1113 			   "IEEE 802.1X: Ignore EAPOL message - STA is using PSK");
1114 		return;
1115 	}
1116 
1117 	if (!sta->eapol_sm) {
1118 		sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
1119 		if (!sta->eapol_sm)
1120 			return;
1121 
1122 #ifdef CONFIG_WPS
1123 		if (!hapd->conf->ieee802_1x && hapd->conf->wps_state) {
1124 			u32 wflags = sta->flags & (WLAN_STA_WPS |
1125 						   WLAN_STA_WPS2 |
1126 						   WLAN_STA_MAYBE_WPS);
1127 			if (wflags == WLAN_STA_MAYBE_WPS ||
1128 			    wflags == (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) {
1129 				/*
1130 				 * Delay EAPOL frame transmission until a
1131 				 * possible WPS STA initiates the handshake
1132 				 * with EAPOL-Start. Only allow the wait to be
1133 				 * skipped if the STA is known to support WPS
1134 				 * 2.0.
1135 				 */
1136 				wpa_printf(MSG_DEBUG,
1137 					   "WPS: Do not start EAPOL until EAPOL-Start is received");
1138 				sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
1139 			}
1140 		}
1141 #endif /* CONFIG_WPS */
1142 
1143 		sta->eapol_sm->eap_if->portEnabled = true;
1144 	}
1145 
1146 	/* since we support version 1, we can ignore version field and proceed
1147 	 * as specified in version 1 standard [IEEE Std 802.1X-2001, 7.5.5] */
1148 	/* TODO: actually, we are not version 1 anymore.. However, Version 2
1149 	 * does not change frame contents, so should be ok to process frames
1150 	 * more or less identically. Some changes might be needed for
1151 	 * verification of fields. */
1152 
1153 	switch (hdr->type) {
1154 	case IEEE802_1X_TYPE_EAP_PACKET:
1155 		handle_eap(hapd, sta, (u8 *) (hdr + 1), datalen);
1156 		break;
1157 
1158 	case IEEE802_1X_TYPE_EAPOL_START:
1159 		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1160 			       HOSTAPD_LEVEL_DEBUG,
1161 			       "received EAPOL-Start from STA");
1162 		sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
1163 		pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
1164 		if (pmksa) {
1165 			hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
1166 				       HOSTAPD_LEVEL_DEBUG,
1167 				       "cached PMKSA available - ignore it since STA sent EAPOL-Start");
1168 			wpa_auth_sta_clear_pmksa(sta->wpa_sm, pmksa);
1169 		}
1170 		sta->eapol_sm->eapolStart = true;
1171 		sta->eapol_sm->dot1xAuthEapolStartFramesRx++;
1172 		eap_server_clear_identity(sta->eapol_sm->eap);
1173 		wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
1174 		break;
1175 
1176 	case IEEE802_1X_TYPE_EAPOL_LOGOFF:
1177 		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1178 			       HOSTAPD_LEVEL_DEBUG,
1179 			       "received EAPOL-Logoff from STA");
1180 		sta->acct_terminate_cause =
1181 			RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
1182 		accounting_sta_stop(hapd, sta);
1183 		sta->eapol_sm->eapolLogoff = true;
1184 		sta->eapol_sm->dot1xAuthEapolLogoffFramesRx++;
1185 		eap_server_clear_identity(sta->eapol_sm->eap);
1186 		break;
1187 
1188 	case IEEE802_1X_TYPE_EAPOL_KEY:
1189 		wpa_printf(MSG_DEBUG, "   EAPOL-Key");
1190 		if (!ap_sta_is_authorized(sta)) {
1191 			wpa_printf(MSG_DEBUG,
1192 				   "   Dropped key data from unauthorized Supplicant");
1193 			break;
1194 		}
1195 		break;
1196 
1197 	case IEEE802_1X_TYPE_EAPOL_ENCAPSULATED_ASF_ALERT:
1198 		wpa_printf(MSG_DEBUG, "   EAPOL-Encapsulated-ASF-Alert");
1199 		/* TODO: implement support for this; show data */
1200 		break;
1201 
1202 #ifdef CONFIG_MACSEC
1203 	case IEEE802_1X_TYPE_EAPOL_MKA:
1204 		wpa_printf(MSG_EXCESSIVE,
1205 			   "EAPOL type %d will be handled by MKA", hdr->type);
1206 		break;
1207 #endif /* CONFIG_MACSEC */
1208 
1209 	default:
1210 		wpa_printf(MSG_DEBUG, "   unknown IEEE 802.1X packet type");
1211 		sta->eapol_sm->dot1xAuthInvalidEapolFramesRx++;
1212 		break;
1213 	}
1214 
1215 	eapol_auth_step(sta->eapol_sm);
1216 }
1217 
1218 
1219 /**
1220  * ieee802_1x_new_station - Start IEEE 802.1X authentication
1221  * @hapd: hostapd BSS data
1222  * @sta: The station
1223  *
1224  * This function is called to start IEEE 802.1X authentication when a new
1225  * station completes IEEE 802.11 association.
1226  */
ieee802_1x_new_station(struct hostapd_data * hapd,struct sta_info * sta)1227 void ieee802_1x_new_station(struct hostapd_data *hapd, struct sta_info *sta)
1228 {
1229 	struct rsn_pmksa_cache_entry *pmksa;
1230 	int reassoc = 1;
1231 	int force_1x = 0;
1232 	int key_mgmt;
1233 
1234 #ifdef CONFIG_WPS
1235 	if (hapd->conf->wps_state &&
1236 	    ((hapd->conf->wpa && (sta->flags & WLAN_STA_MAYBE_WPS)) ||
1237 	     (sta->flags & WLAN_STA_WPS))) {
1238 		/*
1239 		 * Need to enable IEEE 802.1X/EAPOL state machines for possible
1240 		 * WPS handshake even if IEEE 802.1X/EAPOL is not used for
1241 		 * authentication in this BSS.
1242 		 */
1243 		force_1x = 1;
1244 	}
1245 #endif /* CONFIG_WPS */
1246 
1247 	if (!force_1x && !hapd->conf->ieee802_1x && !hapd->conf->osen) {
1248 		wpa_printf(MSG_DEBUG,
1249 			   "IEEE 802.1X: Ignore STA - 802.1X not enabled or forced for WPS");
1250 		/*
1251 		 * Clear any possible EAPOL authenticator state to support
1252 		 * reassociation change from WPS to PSK.
1253 		 */
1254 		ieee802_1x_free_station(hapd, sta);
1255 		return;
1256 	}
1257 
1258 	key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm);
1259 	if (key_mgmt != -1 &&
1260 	    (wpa_key_mgmt_wpa_psk(key_mgmt) || key_mgmt == WPA_KEY_MGMT_OWE ||
1261 	     key_mgmt == WPA_KEY_MGMT_DPP)) {
1262 		wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - using PSK");
1263 		/*
1264 		 * Clear any possible EAPOL authenticator state to support
1265 		 * reassociation change from WPA-EAP to PSK.
1266 		 */
1267 		ieee802_1x_free_station(hapd, sta);
1268 		return;
1269 	}
1270 
1271 	if (!sta->eapol_sm) {
1272 		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1273 			       HOSTAPD_LEVEL_DEBUG, "start authentication");
1274 		sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
1275 		if (!sta->eapol_sm) {
1276 			hostapd_logger(hapd, sta->addr,
1277 				       HOSTAPD_MODULE_IEEE8021X,
1278 				       HOSTAPD_LEVEL_INFO,
1279 				       "failed to allocate state machine");
1280 			return;
1281 		}
1282 		reassoc = 0;
1283 	}
1284 
1285 #ifdef CONFIG_WPS
1286 	sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
1287 	if (!hapd->conf->ieee802_1x && hapd->conf->wps_state &&
1288 	    !(sta->flags & WLAN_STA_WPS2)) {
1289 		/*
1290 		 * Delay EAPOL frame transmission until a possible WPS STA
1291 		 * initiates the handshake with EAPOL-Start. Only allow the
1292 		 * wait to be skipped if the STA is known to support WPS 2.0.
1293 		 */
1294 		wpa_printf(MSG_DEBUG,
1295 			   "WPS: Do not start EAPOL until EAPOL-Start is received");
1296 		sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
1297 	}
1298 #endif /* CONFIG_WPS */
1299 
1300 	sta->eapol_sm->eap_if->portEnabled = true;
1301 
1302 #ifdef CONFIG_IEEE80211R_AP
1303 	if (sta->auth_alg == WLAN_AUTH_FT) {
1304 		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1305 			       HOSTAPD_LEVEL_DEBUG,
1306 			       "PMK from FT - skip IEEE 802.1X/EAP");
1307 		/* Setup EAPOL state machines to already authenticated state
1308 		 * because of existing FT information from R0KH. */
1309 		sta->eapol_sm->keyRun = true;
1310 		sta->eapol_sm->eap_if->eapKeyAvailable = true;
1311 		sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
1312 		sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
1313 		sta->eapol_sm->authSuccess = true;
1314 		sta->eapol_sm->authFail = false;
1315 		sta->eapol_sm->portValid = true;
1316 		if (sta->eapol_sm->eap)
1317 			eap_sm_notify_cached(sta->eapol_sm->eap);
1318 		ap_sta_bind_vlan(hapd, sta);
1319 		return;
1320 	}
1321 #endif /* CONFIG_IEEE80211R_AP */
1322 
1323 #ifdef CONFIG_FILS
1324 	if (sta->auth_alg == WLAN_AUTH_FILS_SK ||
1325 	    sta->auth_alg == WLAN_AUTH_FILS_SK_PFS ||
1326 	    sta->auth_alg == WLAN_AUTH_FILS_PK) {
1327 		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1328 			       HOSTAPD_LEVEL_DEBUG,
1329 			       "PMK from FILS - skip IEEE 802.1X/EAP");
1330 		/* Setup EAPOL state machines to already authenticated state
1331 		 * because of existing FILS information. */
1332 		sta->eapol_sm->keyRun = true;
1333 		sta->eapol_sm->eap_if->eapKeyAvailable = true;
1334 		sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
1335 		sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
1336 		sta->eapol_sm->authSuccess = true;
1337 		sta->eapol_sm->authFail = false;
1338 		sta->eapol_sm->portValid = true;
1339 		if (sta->eapol_sm->eap)
1340 			eap_sm_notify_cached(sta->eapol_sm->eap);
1341 		wpa_auth_set_ptk_rekey_timer(sta->wpa_sm);
1342 		return;
1343 	}
1344 #endif /* CONFIG_FILS */
1345 
1346 	pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
1347 	if (pmksa) {
1348 		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1349 			       HOSTAPD_LEVEL_DEBUG,
1350 			       "PMK from PMKSA cache - skip IEEE 802.1X/EAP");
1351 		/* Setup EAPOL state machines to already authenticated state
1352 		 * because of existing PMKSA information in the cache. */
1353 		sta->eapol_sm->keyRun = true;
1354 		sta->eapol_sm->eap_if->eapKeyAvailable = true;
1355 		sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
1356 		sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
1357 		sta->eapol_sm->authSuccess = true;
1358 		sta->eapol_sm->authFail = false;
1359 		if (sta->eapol_sm->eap)
1360 			eap_sm_notify_cached(sta->eapol_sm->eap);
1361 		pmksa_cache_to_eapol_data(hapd, pmksa, sta->eapol_sm);
1362 		ap_sta_bind_vlan(hapd, sta);
1363 	} else {
1364 		if (reassoc) {
1365 			/*
1366 			 * Force EAPOL state machines to start
1367 			 * re-authentication without having to wait for the
1368 			 * Supplicant to send EAPOL-Start.
1369 			 */
1370 			sta->eapol_sm->reAuthenticate = true;
1371 		}
1372 		eapol_auth_step(sta->eapol_sm);
1373 	}
1374 }
1375 
1376 
ieee802_1x_free_station(struct hostapd_data * hapd,struct sta_info * sta)1377 void ieee802_1x_free_station(struct hostapd_data *hapd, struct sta_info *sta)
1378 {
1379 	struct eapol_state_machine *sm = sta->eapol_sm;
1380 
1381 #ifdef CONFIG_HS20
1382 	eloop_cancel_timeout(ieee802_1x_wnm_notif_send, hapd, sta);
1383 #endif /* CONFIG_HS20 */
1384 
1385 	if (sta->pending_eapol_rx) {
1386 		wpabuf_free(sta->pending_eapol_rx->buf);
1387 		os_free(sta->pending_eapol_rx);
1388 		sta->pending_eapol_rx = NULL;
1389 	}
1390 
1391 	if (!sm)
1392 		return;
1393 
1394 	sta->eapol_sm = NULL;
1395 
1396 #ifndef CONFIG_NO_RADIUS
1397 	radius_msg_free(sm->last_recv_radius);
1398 	radius_free_class(&sm->radius_class);
1399 #endif /* CONFIG_NO_RADIUS */
1400 
1401 	eapol_auth_free(sm);
1402 }
1403 
1404 
1405 #ifndef CONFIG_NO_RADIUS
ieee802_1x_decapsulate_radius(struct hostapd_data * hapd,struct sta_info * sta)1406 static void ieee802_1x_decapsulate_radius(struct hostapd_data *hapd,
1407 					  struct sta_info *sta)
1408 {
1409 	struct wpabuf *eap;
1410 	const struct eap_hdr *hdr;
1411 	int eap_type = -1;
1412 	char buf[64];
1413 	struct radius_msg *msg;
1414 	struct eapol_state_machine *sm = sta->eapol_sm;
1415 
1416 	if (!sm || !sm->last_recv_radius) {
1417 		if (sm)
1418 			sm->eap_if->aaaEapNoReq = true;
1419 		return;
1420 	}
1421 
1422 	msg = sm->last_recv_radius;
1423 
1424 	eap = radius_msg_get_eap(msg);
1425 	if (!eap) {
1426 		/* RFC 3579, Chap. 2.6.3:
1427 		 * RADIUS server SHOULD NOT send Access-Reject/no EAP-Message
1428 		 * attribute */
1429 		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1430 			       HOSTAPD_LEVEL_WARNING,
1431 			       "could not extract EAP-Message from RADIUS message");
1432 		sm->eap_if->aaaEapNoReq = true;
1433 		return;
1434 	}
1435 
1436 	if (wpabuf_len(eap) < sizeof(*hdr)) {
1437 		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1438 			       HOSTAPD_LEVEL_WARNING,
1439 			       "too short EAP packet received from authentication server");
1440 		wpabuf_free(eap);
1441 		sm->eap_if->aaaEapNoReq = true;
1442 		return;
1443 	}
1444 
1445 	if (wpabuf_len(eap) > sizeof(*hdr))
1446 		eap_type = (wpabuf_head_u8(eap))[sizeof(*hdr)];
1447 
1448 	hdr = wpabuf_head(eap);
1449 	switch (hdr->code) {
1450 	case EAP_CODE_REQUEST:
1451 		if (eap_type >= 0)
1452 			sm->eap_type_authsrv = eap_type;
1453 		os_snprintf(buf, sizeof(buf), "EAP-Request-%s (%d)",
1454 			    eap_server_get_name(0, eap_type), eap_type);
1455 		break;
1456 	case EAP_CODE_RESPONSE:
1457 		os_snprintf(buf, sizeof(buf), "EAP Response-%s (%d)",
1458 			    eap_server_get_name(0, eap_type), eap_type);
1459 		break;
1460 	case EAP_CODE_SUCCESS:
1461 		os_strlcpy(buf, "EAP Success", sizeof(buf));
1462 		break;
1463 	case EAP_CODE_FAILURE:
1464 		os_strlcpy(buf, "EAP Failure", sizeof(buf));
1465 		break;
1466 	default:
1467 		os_strlcpy(buf, "unknown EAP code", sizeof(buf));
1468 		break;
1469 	}
1470 	buf[sizeof(buf) - 1] = '\0';
1471 	hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1472 		       HOSTAPD_LEVEL_DEBUG,
1473 		       "decapsulated EAP packet (code=%d id=%d len=%d) from RADIUS server: %s",
1474 		       hdr->code, hdr->identifier, be_to_host16(hdr->length),
1475 		       buf);
1476 	sm->eap_if->aaaEapReq = true;
1477 
1478 	wpabuf_free(sm->eap_if->aaaEapReqData);
1479 	sm->eap_if->aaaEapReqData = eap;
1480 }
1481 
1482 
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)1483 static void ieee802_1x_get_keys(struct hostapd_data *hapd,
1484 				struct sta_info *sta, struct radius_msg *msg,
1485 				struct radius_msg *req,
1486 				const u8 *shared_secret,
1487 				size_t shared_secret_len)
1488 {
1489 	struct radius_ms_mppe_keys *keys;
1490 	u8 *buf;
1491 	size_t len;
1492 	struct eapol_state_machine *sm = sta->eapol_sm;
1493 
1494 	if (!sm)
1495 		return;
1496 
1497 	keys = radius_msg_get_ms_keys(msg, req, shared_secret,
1498 				      shared_secret_len);
1499 
1500 	if (keys && keys->send && keys->recv) {
1501 		len = keys->send_len + keys->recv_len;
1502 		wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Send-Key",
1503 				keys->send, keys->send_len);
1504 		wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Recv-Key",
1505 				keys->recv, keys->recv_len);
1506 
1507 		os_free(sm->eap_if->aaaEapKeyData);
1508 		sm->eap_if->aaaEapKeyData = os_malloc(len);
1509 		if (sm->eap_if->aaaEapKeyData) {
1510 			os_memcpy(sm->eap_if->aaaEapKeyData, keys->recv,
1511 				  keys->recv_len);
1512 			os_memcpy(sm->eap_if->aaaEapKeyData + keys->recv_len,
1513 				  keys->send, keys->send_len);
1514 			sm->eap_if->aaaEapKeyDataLen = len;
1515 			sm->eap_if->aaaEapKeyAvailable = true;
1516 		}
1517 	} else {
1518 		wpa_printf(MSG_DEBUG,
1519 			   "MS-MPPE: 1x_get_keys, could not get keys: %p  send: %p  recv: %p",
1520 			   keys, keys ? keys->send : NULL,
1521 			   keys ? keys->recv : NULL);
1522 	}
1523 
1524 	if (keys) {
1525 		os_free(keys->send);
1526 		os_free(keys->recv);
1527 		os_free(keys);
1528 	}
1529 
1530 	if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_EAP_KEY_NAME, &buf, &len,
1531 				    NULL) == 0) {
1532 		os_free(sm->eap_if->eapSessionId);
1533 		sm->eap_if->eapSessionId = os_memdup(buf, len);
1534 		if (sm->eap_if->eapSessionId) {
1535 			sm->eap_if->eapSessionIdLen = len;
1536 			wpa_hexdump(MSG_DEBUG, "EAP-Key Name",
1537 				    sm->eap_if->eapSessionId,
1538 				    sm->eap_if->eapSessionIdLen);
1539 		}
1540 	} else {
1541 		sm->eap_if->eapSessionIdLen = 0;
1542 	}
1543 }
1544 
1545 
ieee802_1x_store_radius_class(struct hostapd_data * hapd,struct sta_info * sta,struct radius_msg * msg)1546 static void ieee802_1x_store_radius_class(struct hostapd_data *hapd,
1547 					  struct sta_info *sta,
1548 					  struct radius_msg *msg)
1549 {
1550 	u8 *attr_class;
1551 	size_t class_len;
1552 	struct eapol_state_machine *sm = sta->eapol_sm;
1553 	int count, i;
1554 	struct radius_attr_data *nclass;
1555 	size_t nclass_count;
1556 
1557 	if (!hapd->conf->radius->acct_server || !hapd->radius || !sm)
1558 		return;
1559 
1560 	radius_free_class(&sm->radius_class);
1561 	count = radius_msg_count_attr(msg, RADIUS_ATTR_CLASS, 1);
1562 	if (count <= 0)
1563 		return;
1564 
1565 	nclass = os_calloc(count, sizeof(struct radius_attr_data));
1566 	if (!nclass)
1567 		return;
1568 
1569 	nclass_count = 0;
1570 
1571 	attr_class = NULL;
1572 	for (i = 0; i < count; i++) {
1573 		do {
1574 			if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CLASS,
1575 						    &attr_class, &class_len,
1576 						    attr_class) < 0) {
1577 				i = count;
1578 				break;
1579 			}
1580 		} while (class_len < 1);
1581 
1582 		nclass[nclass_count].data = os_memdup(attr_class, class_len);
1583 		if (!nclass[nclass_count].data)
1584 			break;
1585 
1586 		nclass[nclass_count].len = class_len;
1587 		nclass_count++;
1588 	}
1589 
1590 	sm->radius_class.attr = nclass;
1591 	sm->radius_class.count = nclass_count;
1592 	wpa_printf(MSG_DEBUG,
1593 		   "IEEE 802.1X: Stored %lu RADIUS Class attributes for "
1594 		   MACSTR,
1595 		   (unsigned long) sm->radius_class.count,
1596 		   MAC2STR(sta->addr));
1597 }
1598 
1599 
1600 /* 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)1601 static void ieee802_1x_update_sta_identity(struct hostapd_data *hapd,
1602 					   struct sta_info *sta,
1603 					   struct radius_msg *msg)
1604 {
1605 	u8 *buf, *identity;
1606 	size_t len;
1607 	struct eapol_state_machine *sm = sta->eapol_sm;
1608 
1609 	if (!sm)
1610 		return;
1611 
1612 	if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_USER_NAME, &buf, &len,
1613 				    NULL) < 0)
1614 		return;
1615 
1616 	identity = (u8 *) dup_binstr(buf, len);
1617 	if (!identity)
1618 		return;
1619 
1620 	hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1621 		       HOSTAPD_LEVEL_DEBUG,
1622 		       "old identity '%s' updated with User-Name from Access-Accept '%s'",
1623 		       sm->identity ? (char *) sm->identity : "N/A",
1624 		       (char *) identity);
1625 
1626 	os_free(sm->identity);
1627 	sm->identity = identity;
1628 	sm->identity_len = len;
1629 }
1630 
1631 
1632 /* 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)1633 static void ieee802_1x_update_sta_cui(struct hostapd_data *hapd,
1634 				      struct sta_info *sta,
1635 				      struct radius_msg *msg)
1636 {
1637 	struct eapol_state_machine *sm = sta->eapol_sm;
1638 	struct wpabuf *cui;
1639 	u8 *buf;
1640 	size_t len;
1641 
1642 	if (!sm)
1643 		return;
1644 
1645 	if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CHARGEABLE_USER_IDENTITY,
1646 				    &buf, &len, NULL) < 0)
1647 		return;
1648 
1649 	cui = wpabuf_alloc_copy(buf, len);
1650 	if (!cui)
1651 		return;
1652 
1653 	wpabuf_free(sm->radius_cui);
1654 	sm->radius_cui = cui;
1655 }
1656 
1657 
1658 #ifdef CONFIG_HS20
1659 
ieee802_1x_hs20_sub_rem(struct sta_info * sta,u8 * pos,size_t len)1660 static void ieee802_1x_hs20_sub_rem(struct sta_info *sta, u8 *pos, size_t len)
1661 {
1662 	sta->remediation = 1;
1663 	os_free(sta->remediation_url);
1664 	if (len > 2) {
1665 		sta->remediation_url = os_malloc(len);
1666 		if (!sta->remediation_url)
1667 			return;
1668 		sta->remediation_method = pos[0];
1669 		os_memcpy(sta->remediation_url, pos + 1, len - 1);
1670 		sta->remediation_url[len - 1] = '\0';
1671 		wpa_printf(MSG_DEBUG,
1672 			   "HS 2.0: Subscription remediation needed for "
1673 			   MACSTR " - server method %u URL %s",
1674 			   MAC2STR(sta->addr), sta->remediation_method,
1675 			   sta->remediation_url);
1676 	} else {
1677 		sta->remediation_url = NULL;
1678 		wpa_printf(MSG_DEBUG,
1679 			   "HS 2.0: Subscription remediation needed for "
1680 			   MACSTR, MAC2STR(sta->addr));
1681 	}
1682 	/* TODO: assign the STA into remediation VLAN or add filtering */
1683 }
1684 
1685 
ieee802_1x_hs20_deauth_req(struct hostapd_data * hapd,struct sta_info * sta,u8 * pos,size_t len)1686 static void ieee802_1x_hs20_deauth_req(struct hostapd_data *hapd,
1687 				       struct sta_info *sta, u8 *pos,
1688 				       size_t len)
1689 {
1690 	if (len < 3)
1691 		return; /* Malformed information */
1692 	sta->hs20_deauth_requested = 1;
1693 	wpa_printf(MSG_DEBUG,
1694 		   "HS 2.0: Deauthentication request - Code %u  Re-auth Delay %u",
1695 		   *pos, WPA_GET_LE16(pos + 1));
1696 	wpabuf_free(sta->hs20_deauth_req);
1697 	sta->hs20_deauth_req = wpabuf_alloc(len + 1);
1698 	if (sta->hs20_deauth_req) {
1699 		wpabuf_put_data(sta->hs20_deauth_req, pos, 3);
1700 		wpabuf_put_u8(sta->hs20_deauth_req, len - 3);
1701 		wpabuf_put_data(sta->hs20_deauth_req, pos + 3, len - 3);
1702 	}
1703 	ap_sta_session_timeout(hapd, sta, hapd->conf->hs20_deauth_req_timeout);
1704 }
1705 
1706 
ieee802_1x_hs20_session_info(struct hostapd_data * hapd,struct sta_info * sta,u8 * pos,size_t len,int session_timeout)1707 static void ieee802_1x_hs20_session_info(struct hostapd_data *hapd,
1708 					 struct sta_info *sta, u8 *pos,
1709 					 size_t len, int session_timeout)
1710 {
1711 	unsigned int swt;
1712 	int warning_time, beacon_int;
1713 
1714 	if (len < 1)
1715 		return; /* Malformed information */
1716 	os_free(sta->hs20_session_info_url);
1717 	sta->hs20_session_info_url = os_malloc(len);
1718 	if (!sta->hs20_session_info_url)
1719 		return;
1720 	swt = pos[0];
1721 	os_memcpy(sta->hs20_session_info_url, pos + 1, len - 1);
1722 	sta->hs20_session_info_url[len - 1] = '\0';
1723 	wpa_printf(MSG_DEBUG,
1724 		   "HS 2.0: Session Information URL='%s' SWT=%u (session_timeout=%d)",
1725 		   sta->hs20_session_info_url, swt, session_timeout);
1726 	if (session_timeout < 0) {
1727 		wpa_printf(MSG_DEBUG,
1728 			   "HS 2.0: No Session-Timeout set - ignore session info URL");
1729 		return;
1730 	}
1731 	if (swt == 255)
1732 		swt = 1; /* Use one minute as the AP selected value */
1733 
1734 	if ((unsigned int) session_timeout < swt * 60)
1735 		warning_time = 0;
1736 	else
1737 		warning_time = session_timeout - swt * 60;
1738 
1739 	beacon_int = hapd->iconf->beacon_int;
1740 	if (beacon_int < 1)
1741 		beacon_int = 100; /* best guess */
1742 	sta->hs20_disassoc_timer = swt * 60 * 1000 / beacon_int * 125 / 128;
1743 	if (sta->hs20_disassoc_timer > 65535)
1744 		sta->hs20_disassoc_timer = 65535;
1745 
1746 	ap_sta_session_warning_timeout(hapd, sta, warning_time);
1747 }
1748 
1749 
ieee802_1x_hs20_t_c_filtering(struct hostapd_data * hapd,struct sta_info * sta,u8 * pos,size_t len)1750 static void ieee802_1x_hs20_t_c_filtering(struct hostapd_data *hapd,
1751 					  struct sta_info *sta, u8 *pos,
1752 					  size_t len)
1753 {
1754 	if (len < 4)
1755 		return; /* Malformed information */
1756 	wpa_printf(MSG_DEBUG,
1757 		   "HS 2.0: Terms and Conditions filtering %02x %02x %02x %02x",
1758 		   pos[0], pos[1], pos[2], pos[3]);
1759 	hs20_t_c_filtering(hapd, sta, pos[0] & BIT(0));
1760 }
1761 
1762 
ieee802_1x_hs20_t_c_url(struct hostapd_data * hapd,struct sta_info * sta,u8 * pos,size_t len)1763 static void ieee802_1x_hs20_t_c_url(struct hostapd_data *hapd,
1764 				    struct sta_info *sta, u8 *pos, size_t len)
1765 {
1766 	os_free(sta->t_c_url);
1767 	sta->t_c_url = os_malloc(len + 1);
1768 	if (!sta->t_c_url)
1769 		return;
1770 	os_memcpy(sta->t_c_url, pos, len);
1771 	sta->t_c_url[len] = '\0';
1772 	wpa_printf(MSG_DEBUG,
1773 		   "HS 2.0: Terms and Conditions URL %s", sta->t_c_url);
1774 }
1775 
1776 #endif /* CONFIG_HS20 */
1777 
1778 
ieee802_1x_check_hs20(struct hostapd_data * hapd,struct sta_info * sta,struct radius_msg * msg,int session_timeout)1779 static void ieee802_1x_check_hs20(struct hostapd_data *hapd,
1780 				  struct sta_info *sta,
1781 				  struct radius_msg *msg,
1782 				  int session_timeout)
1783 {
1784 #ifdef CONFIG_HS20
1785 	u8 *buf, *pos, *end, type, sublen;
1786 	size_t len;
1787 
1788 	buf = NULL;
1789 	sta->remediation = 0;
1790 	sta->hs20_deauth_requested = 0;
1791 
1792 	for (;;) {
1793 		if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_VENDOR_SPECIFIC,
1794 					    &buf, &len, buf) < 0)
1795 			break;
1796 		if (len < 6)
1797 			continue;
1798 		pos = buf;
1799 		end = buf + len;
1800 		if (WPA_GET_BE32(pos) != RADIUS_VENDOR_ID_WFA)
1801 			continue;
1802 		pos += 4;
1803 
1804 		type = *pos++;
1805 		sublen = *pos++;
1806 		if (sublen < 2)
1807 			continue; /* invalid length */
1808 		sublen -= 2; /* skip header */
1809 		if (pos + sublen > end)
1810 			continue; /* invalid WFA VSA */
1811 
1812 		switch (type) {
1813 		case RADIUS_VENDOR_ATTR_WFA_HS20_SUBSCR_REMEDIATION:
1814 			ieee802_1x_hs20_sub_rem(sta, pos, sublen);
1815 			break;
1816 		case RADIUS_VENDOR_ATTR_WFA_HS20_DEAUTH_REQ:
1817 			ieee802_1x_hs20_deauth_req(hapd, sta, pos, sublen);
1818 			break;
1819 		case RADIUS_VENDOR_ATTR_WFA_HS20_SESSION_INFO_URL:
1820 			ieee802_1x_hs20_session_info(hapd, sta, pos, sublen,
1821 						     session_timeout);
1822 			break;
1823 		case RADIUS_VENDOR_ATTR_WFA_HS20_T_C_FILTERING:
1824 			ieee802_1x_hs20_t_c_filtering(hapd, sta, pos, sublen);
1825 			break;
1826 		case RADIUS_VENDOR_ATTR_WFA_HS20_T_C_URL:
1827 			ieee802_1x_hs20_t_c_url(hapd, sta, pos, sublen);
1828 			break;
1829 		}
1830 	}
1831 #endif /* CONFIG_HS20 */
1832 }
1833 
1834 
1835 struct sta_id_search {
1836 	u8 identifier;
1837 	struct eapol_state_machine *sm;
1838 };
1839 
1840 
ieee802_1x_select_radius_identifier(struct hostapd_data * hapd,struct sta_info * sta,void * ctx)1841 static int ieee802_1x_select_radius_identifier(struct hostapd_data *hapd,
1842 					       struct sta_info *sta,
1843 					       void *ctx)
1844 {
1845 	struct sta_id_search *id_search = ctx;
1846 	struct eapol_state_machine *sm = sta->eapol_sm;
1847 
1848 	if (sm && sm->radius_identifier >= 0 &&
1849 	    sm->radius_identifier == id_search->identifier) {
1850 		id_search->sm = sm;
1851 		return 1;
1852 	}
1853 	return 0;
1854 }
1855 
1856 
1857 static struct eapol_state_machine *
ieee802_1x_search_radius_identifier(struct hostapd_data * hapd,u8 identifier)1858 ieee802_1x_search_radius_identifier(struct hostapd_data *hapd, u8 identifier)
1859 {
1860 	struct sta_id_search id_search;
1861 
1862 	id_search.identifier = identifier;
1863 	id_search.sm = NULL;
1864 	ap_for_each_sta(hapd, ieee802_1x_select_radius_identifier, &id_search);
1865 	return id_search.sm;
1866 }
1867 
1868 
1869 #ifndef CONFIG_NO_VLAN
ieee802_1x_update_vlan(struct radius_msg * msg,struct hostapd_data * hapd,struct sta_info * sta)1870 static int ieee802_1x_update_vlan(struct radius_msg *msg,
1871 				  struct hostapd_data *hapd,
1872 				  struct sta_info *sta)
1873 {
1874 	struct vlan_description vlan_desc;
1875 
1876 	os_memset(&vlan_desc, 0, sizeof(vlan_desc));
1877 	vlan_desc.notempty = !!radius_msg_get_vlanid(msg, &vlan_desc.untagged,
1878 						     MAX_NUM_TAGGED_VLAN,
1879 						     vlan_desc.tagged);
1880 
1881 	if (vlan_desc.notempty &&
1882 	    !hostapd_vlan_valid(hapd->conf->vlan, &vlan_desc)) {
1883 		sta->eapol_sm->authFail = true;
1884 		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
1885 			       HOSTAPD_LEVEL_INFO,
1886 			       "Invalid VLAN %d%s received from RADIUS server",
1887 			       vlan_desc.untagged,
1888 			       vlan_desc.tagged[0] ? "+" : "");
1889 		os_memset(&vlan_desc, 0, sizeof(vlan_desc));
1890 		ap_sta_set_vlan(hapd, sta, &vlan_desc);
1891 		return -1;
1892 	}
1893 
1894 	if (hapd->conf->ssid.dynamic_vlan == DYNAMIC_VLAN_REQUIRED &&
1895 	    !vlan_desc.notempty) {
1896 		sta->eapol_sm->authFail = true;
1897 		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1898 			       HOSTAPD_LEVEL_INFO,
1899 			       "authentication server did not include required VLAN ID in Access-Accept");
1900 		return -1;
1901 	}
1902 
1903 	return ap_sta_set_vlan(hapd, sta, &vlan_desc);
1904 }
1905 #endif /* CONFIG_NO_VLAN */
1906 
1907 
1908 /**
1909  * ieee802_1x_receive_auth - Process RADIUS frames from Authentication Server
1910  * @msg: RADIUS response message
1911  * @req: RADIUS request message
1912  * @shared_secret: RADIUS shared secret
1913  * @shared_secret_len: Length of shared_secret in octets
1914  * @data: Context data (struct hostapd_data *)
1915  * Returns: Processing status
1916  */
1917 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)1918 ieee802_1x_receive_auth(struct radius_msg *msg, struct radius_msg *req,
1919 			const u8 *shared_secret, size_t shared_secret_len,
1920 			void *data)
1921 {
1922 	struct hostapd_data *hapd = data;
1923 	struct sta_info *sta;
1924 	u32 session_timeout = 0, termination_action, acct_interim_interval;
1925 	int session_timeout_set;
1926 	u32 reason_code;
1927 	struct eapol_state_machine *sm;
1928 	int override_eapReq = 0;
1929 	struct radius_hdr *hdr = radius_msg_get_hdr(msg);
1930 
1931 	sm = ieee802_1x_search_radius_identifier(hapd, hdr->identifier);
1932 	if (!sm) {
1933 		wpa_printf(MSG_DEBUG,
1934 			   "IEEE 802.1X: Could not find matching station for this RADIUS message");
1935 		return RADIUS_RX_UNKNOWN;
1936 	}
1937 	sta = sm->sta;
1938 
1939 	/* RFC 2869, Ch. 5.13: valid Message-Authenticator attribute MUST be
1940 	 * present when packet contains an EAP-Message attribute */
1941 	if (hdr->code == RADIUS_CODE_ACCESS_REJECT &&
1942 	    radius_msg_get_attr(msg, RADIUS_ATTR_MESSAGE_AUTHENTICATOR, NULL,
1943 				0) < 0 &&
1944 	    radius_msg_get_attr(msg, RADIUS_ATTR_EAP_MESSAGE, NULL, 0) < 0) {
1945 		wpa_printf(MSG_DEBUG,
1946 			   "Allowing RADIUS Access-Reject without Message-Authenticator since it does not include EAP-Message");
1947 	} else if (radius_msg_verify(msg, shared_secret, shared_secret_len,
1948 				     req, 1)) {
1949 		wpa_printf(MSG_INFO,
1950 			   "Incoming RADIUS packet did not have correct Message-Authenticator - dropped");
1951 		return RADIUS_RX_INVALID_AUTHENTICATOR;
1952 	}
1953 
1954 	if (hdr->code != RADIUS_CODE_ACCESS_ACCEPT &&
1955 	    hdr->code != RADIUS_CODE_ACCESS_REJECT &&
1956 	    hdr->code != RADIUS_CODE_ACCESS_CHALLENGE) {
1957 		wpa_printf(MSG_INFO, "Unknown RADIUS message code");
1958 		return RADIUS_RX_UNKNOWN;
1959 	}
1960 
1961 	sm->radius_identifier = -1;
1962 	wpa_printf(MSG_DEBUG, "RADIUS packet matching with station " MACSTR,
1963 		   MAC2STR(sta->addr));
1964 
1965 	radius_msg_free(sm->last_recv_radius);
1966 	sm->last_recv_radius = msg;
1967 
1968 	session_timeout_set =
1969 		!radius_msg_get_attr_int32(msg, RADIUS_ATTR_SESSION_TIMEOUT,
1970 					   &session_timeout);
1971 	if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_TERMINATION_ACTION,
1972 				      &termination_action))
1973 		termination_action = RADIUS_TERMINATION_ACTION_DEFAULT;
1974 
1975 	if (hapd->conf->acct_interim_interval == 0 &&
1976 	    hdr->code == RADIUS_CODE_ACCESS_ACCEPT &&
1977 	    radius_msg_get_attr_int32(msg, RADIUS_ATTR_ACCT_INTERIM_INTERVAL,
1978 				      &acct_interim_interval) == 0) {
1979 		if (acct_interim_interval < 60) {
1980 			hostapd_logger(hapd, sta->addr,
1981 				       HOSTAPD_MODULE_IEEE8021X,
1982 				       HOSTAPD_LEVEL_INFO,
1983 				       "ignored too small Acct-Interim-Interval %d",
1984 				       acct_interim_interval);
1985 		} else
1986 			sta->acct_interim_interval = acct_interim_interval;
1987 	}
1988 
1989 
1990 	switch (hdr->code) {
1991 	case RADIUS_CODE_ACCESS_ACCEPT:
1992 #ifndef CONFIG_NO_VLAN
1993 		if (hapd->conf->ssid.dynamic_vlan != DYNAMIC_VLAN_DISABLED &&
1994 		    ieee802_1x_update_vlan(msg, hapd, sta) < 0)
1995 			break;
1996 
1997 		if (sta->vlan_id > 0) {
1998 			hostapd_logger(hapd, sta->addr,
1999 				       HOSTAPD_MODULE_RADIUS,
2000 				       HOSTAPD_LEVEL_INFO,
2001 				       "VLAN ID %d", sta->vlan_id);
2002 		}
2003 
2004 		if ((sta->flags & WLAN_STA_ASSOC) &&
2005 		    ap_sta_bind_vlan(hapd, sta) < 0)
2006 			break;
2007 #endif /* CONFIG_NO_VLAN */
2008 
2009 		sta->session_timeout_set = !!session_timeout_set;
2010 		os_get_reltime(&sta->session_timeout);
2011 		sta->session_timeout.sec += session_timeout;
2012 
2013 		/* RFC 3580, Ch. 3.17 */
2014 		if (session_timeout_set && termination_action ==
2015 		    RADIUS_TERMINATION_ACTION_RADIUS_REQUEST)
2016 			sm->reAuthPeriod = session_timeout;
2017 		else if (session_timeout_set)
2018 			ap_sta_session_timeout(hapd, sta, session_timeout);
2019 		else
2020 			ap_sta_no_session_timeout(hapd, sta);
2021 
2022 		sm->eap_if->aaaSuccess = true;
2023 		override_eapReq = 1;
2024 		ieee802_1x_get_keys(hapd, sta, msg, req, shared_secret,
2025 				    shared_secret_len);
2026 		ieee802_1x_store_radius_class(hapd, sta, msg);
2027 		ieee802_1x_update_sta_identity(hapd, sta, msg);
2028 		ieee802_1x_update_sta_cui(hapd, sta, msg);
2029 		ieee802_1x_check_hs20(hapd, sta, msg,
2030 				      session_timeout_set ?
2031 				      (int) session_timeout : -1);
2032 		break;
2033 	case RADIUS_CODE_ACCESS_REJECT:
2034 		sm->eap_if->aaaFail = true;
2035 		override_eapReq = 1;
2036 		if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_WLAN_REASON_CODE,
2037 					      &reason_code) == 0) {
2038 			wpa_printf(MSG_DEBUG,
2039 				   "RADIUS server indicated WLAN-Reason-Code %u in Access-Reject for "
2040 				   MACSTR, reason_code, MAC2STR(sta->addr));
2041 			sta->disconnect_reason_code = reason_code;
2042 		}
2043 		break;
2044 	case RADIUS_CODE_ACCESS_CHALLENGE:
2045 		sm->eap_if->aaaEapReq = true;
2046 		if (session_timeout_set) {
2047 			/* RFC 2869, Ch. 2.3.2; RFC 3580, Ch. 3.17 */
2048 			sm->eap_if->aaaMethodTimeout = session_timeout;
2049 			hostapd_logger(hapd, sm->addr,
2050 				       HOSTAPD_MODULE_IEEE8021X,
2051 				       HOSTAPD_LEVEL_DEBUG,
2052 				       "using EAP timeout of %d seconds (from RADIUS)",
2053 				       sm->eap_if->aaaMethodTimeout);
2054 		} else {
2055 			/*
2056 			 * Use dynamic retransmission behavior per EAP
2057 			 * specification.
2058 			 */
2059 			sm->eap_if->aaaMethodTimeout = 0;
2060 		}
2061 		break;
2062 	}
2063 
2064 	ieee802_1x_decapsulate_radius(hapd, sta);
2065 	if (override_eapReq)
2066 		sm->eap_if->aaaEapReq = false;
2067 
2068 #ifdef CONFIG_FILS
2069 #ifdef NEED_AP_MLME
2070 	if (sta->flags &
2071 	    (WLAN_STA_PENDING_FILS_ERP | WLAN_STA_PENDING_PASN_FILS_ERP)) {
2072 		/* TODO: Add a PMKSA entry on success? */
2073 		ieee802_11_finish_fils_auth(
2074 			hapd, sta, hdr->code == RADIUS_CODE_ACCESS_ACCEPT,
2075 			sm->eap_if->aaaEapReqData,
2076 			sm->eap_if->aaaEapKeyData,
2077 			sm->eap_if->aaaEapKeyDataLen);
2078 	}
2079 #endif /* NEED_AP_MLME */
2080 #endif /* CONFIG_FILS */
2081 
2082 	eapol_auth_step(sm);
2083 
2084 	return RADIUS_RX_QUEUED;
2085 }
2086 #endif /* CONFIG_NO_RADIUS */
2087 
2088 
ieee802_1x_abort_auth(struct hostapd_data * hapd,struct sta_info * sta)2089 void ieee802_1x_abort_auth(struct hostapd_data *hapd, struct sta_info *sta)
2090 {
2091 	struct eapol_state_machine *sm = sta->eapol_sm;
2092 
2093 	if (!sm)
2094 		return;
2095 
2096 	hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
2097 		       HOSTAPD_LEVEL_DEBUG, "aborting authentication");
2098 
2099 #ifndef CONFIG_NO_RADIUS
2100 	radius_msg_free(sm->last_recv_radius);
2101 	sm->last_recv_radius = NULL;
2102 #endif /* CONFIG_NO_RADIUS */
2103 
2104 	if (sm->eap_if->eapTimeout) {
2105 		/*
2106 		 * Disconnect the STA since it did not reply to the last EAP
2107 		 * request and we cannot continue EAP processing (EAP-Failure
2108 		 * could only be sent if the EAP peer actually replied).
2109 		 */
2110 		wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "EAP Timeout, STA " MACSTR,
2111 			MAC2STR(sta->addr));
2112 
2113 		sm->eap_if->portEnabled = false;
2114 		ap_sta_disconnect(hapd, sta, sta->addr,
2115 				  WLAN_REASON_PREV_AUTH_NOT_VALID);
2116 	}
2117 }
2118 
2119 
2120 #ifdef CONFIG_WEP
2121 
ieee802_1x_rekey_broadcast(struct hostapd_data * hapd)2122 static int ieee802_1x_rekey_broadcast(struct hostapd_data *hapd)
2123 {
2124 	struct eapol_authenticator *eapol = hapd->eapol_auth;
2125 
2126 	if (hapd->conf->default_wep_key_len < 1)
2127 		return 0;
2128 
2129 	os_free(eapol->default_wep_key);
2130 	eapol->default_wep_key = os_malloc(hapd->conf->default_wep_key_len);
2131 	if (!eapol->default_wep_key ||
2132 	    random_get_bytes(eapol->default_wep_key,
2133 			     hapd->conf->default_wep_key_len)) {
2134 		wpa_printf(MSG_INFO, "Could not generate random WEP key");
2135 		os_free(eapol->default_wep_key);
2136 		eapol->default_wep_key = NULL;
2137 		return -1;
2138 	}
2139 
2140 	wpa_hexdump_key(MSG_DEBUG, "IEEE 802.1X: New default WEP key",
2141 			eapol->default_wep_key,
2142 			hapd->conf->default_wep_key_len);
2143 
2144 	return 0;
2145 }
2146 
2147 
ieee802_1x_sta_key_available(struct hostapd_data * hapd,struct sta_info * sta,void * ctx)2148 static int ieee802_1x_sta_key_available(struct hostapd_data *hapd,
2149 					struct sta_info *sta, void *ctx)
2150 {
2151 	if (sta->eapol_sm) {
2152 		sta->eapol_sm->eap_if->eapKeyAvailable = true;
2153 		eapol_auth_step(sta->eapol_sm);
2154 	}
2155 	return 0;
2156 }
2157 
2158 
ieee802_1x_rekey(void * eloop_ctx,void * timeout_ctx)2159 static void ieee802_1x_rekey(void *eloop_ctx, void *timeout_ctx)
2160 {
2161 	struct hostapd_data *hapd = eloop_ctx;
2162 	struct eapol_authenticator *eapol = hapd->eapol_auth;
2163 
2164 	if (eapol->default_wep_key_idx >= 3)
2165 		eapol->default_wep_key_idx =
2166 			hapd->conf->individual_wep_key_len > 0 ? 1 : 0;
2167 	else
2168 		eapol->default_wep_key_idx++;
2169 
2170 	wpa_printf(MSG_DEBUG, "IEEE 802.1X: New default WEP key index %d",
2171 		   eapol->default_wep_key_idx);
2172 
2173 	if (ieee802_1x_rekey_broadcast(hapd)) {
2174 		hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
2175 			       HOSTAPD_LEVEL_WARNING,
2176 			       "failed to generate a new broadcast key");
2177 		os_free(eapol->default_wep_key);
2178 		eapol->default_wep_key = NULL;
2179 		return;
2180 	}
2181 
2182 	/* TODO: Could setup key for RX here, but change default TX keyid only
2183 	 * after new broadcast key has been sent to all stations. */
2184 	if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
2185 				broadcast_ether_addr,
2186 				eapol->default_wep_key_idx, 0, 1, NULL, 0,
2187 				eapol->default_wep_key,
2188 				hapd->conf->default_wep_key_len,
2189 				KEY_FLAG_GROUP_RX_TX_DEFAULT)) {
2190 		hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
2191 			       HOSTAPD_LEVEL_WARNING,
2192 			       "failed to configure a new broadcast key");
2193 		os_free(eapol->default_wep_key);
2194 		eapol->default_wep_key = NULL;
2195 		return;
2196 	}
2197 
2198 	ap_for_each_sta(hapd, ieee802_1x_sta_key_available, NULL);
2199 
2200 	if (hapd->conf->wep_rekeying_period > 0) {
2201 		eloop_register_timeout(hapd->conf->wep_rekeying_period, 0,
2202 				       ieee802_1x_rekey, hapd, NULL);
2203 	}
2204 }
2205 
2206 #endif /* CONFIG_WEP */
2207 
2208 
ieee802_1x_eapol_send(void * ctx,void * sta_ctx,u8 type,const u8 * data,size_t datalen)2209 static void ieee802_1x_eapol_send(void *ctx, void *sta_ctx, u8 type,
2210 				  const u8 *data, size_t datalen)
2211 {
2212 #ifdef CONFIG_WPS
2213 	struct sta_info *sta = sta_ctx;
2214 
2215 	if ((sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) ==
2216 	    WLAN_STA_MAYBE_WPS) {
2217 		const u8 *identity;
2218 		size_t identity_len;
2219 		struct eapol_state_machine *sm = sta->eapol_sm;
2220 
2221 		identity = eap_get_identity(sm->eap, &identity_len);
2222 		if (identity &&
2223 		    ((identity_len == WSC_ID_ENROLLEE_LEN &&
2224 		      os_memcmp(identity, WSC_ID_ENROLLEE,
2225 				WSC_ID_ENROLLEE_LEN) == 0) ||
2226 		     (identity_len == WSC_ID_REGISTRAR_LEN &&
2227 		      os_memcmp(identity, WSC_ID_REGISTRAR,
2228 				WSC_ID_REGISTRAR_LEN) == 0))) {
2229 			wpa_printf(MSG_DEBUG,
2230 				   "WPS: WLAN_STA_MAYBE_WPS -> WLAN_STA_WPS");
2231 			sta->flags |= WLAN_STA_WPS;
2232 		}
2233 	}
2234 #endif /* CONFIG_WPS */
2235 
2236 	ieee802_1x_send(ctx, sta_ctx, type, data, datalen);
2237 }
2238 
2239 
ieee802_1x_aaa_send(void * ctx,void * sta_ctx,const u8 * data,size_t datalen)2240 static void ieee802_1x_aaa_send(void *ctx, void *sta_ctx,
2241 				const u8 *data, size_t datalen)
2242 {
2243 #ifndef CONFIG_NO_RADIUS
2244 	struct hostapd_data *hapd = ctx;
2245 	struct sta_info *sta = sta_ctx;
2246 
2247 	ieee802_1x_encapsulate_radius(hapd, sta, data, datalen);
2248 #endif /* CONFIG_NO_RADIUS */
2249 }
2250 
2251 
_ieee802_1x_finished(void * ctx,void * sta_ctx,int success,int preauth,int remediation)2252 static void _ieee802_1x_finished(void *ctx, void *sta_ctx, int success,
2253 				 int preauth, int remediation)
2254 {
2255 	struct hostapd_data *hapd = ctx;
2256 	struct sta_info *sta = sta_ctx;
2257 
2258 	if (preauth)
2259 		rsn_preauth_finished(hapd, sta, success);
2260 	else
2261 		ieee802_1x_finished(hapd, sta, success, remediation);
2262 }
2263 
2264 
ieee802_1x_get_eap_user(void * ctx,const u8 * identity,size_t identity_len,int phase2,struct eap_user * user)2265 static int ieee802_1x_get_eap_user(void *ctx, const u8 *identity,
2266 				   size_t identity_len, int phase2,
2267 				   struct eap_user *user)
2268 {
2269 	struct hostapd_data *hapd = ctx;
2270 	const struct hostapd_eap_user *eap_user;
2271 	int i;
2272 	int rv = -1;
2273 
2274 	eap_user = hostapd_get_eap_user(hapd, identity, identity_len, phase2);
2275 	if (!eap_user)
2276 		goto out;
2277 
2278 	os_memset(user, 0, sizeof(*user));
2279 	user->phase2 = phase2;
2280 	for (i = 0; i < EAP_MAX_METHODS; i++) {
2281 		user->methods[i].vendor = eap_user->methods[i].vendor;
2282 		user->methods[i].method = eap_user->methods[i].method;
2283 	}
2284 
2285 	if (eap_user->password) {
2286 		user->password = os_memdup(eap_user->password,
2287 					   eap_user->password_len);
2288 		if (!user->password)
2289 			goto out;
2290 		user->password_len = eap_user->password_len;
2291 		user->password_hash = eap_user->password_hash;
2292 		if (eap_user->salt && eap_user->salt_len) {
2293 			user->salt = os_memdup(eap_user->salt,
2294 					       eap_user->salt_len);
2295 			if (!user->salt)
2296 				goto out;
2297 			user->salt_len = eap_user->salt_len;
2298 		}
2299 	}
2300 	user->force_version = eap_user->force_version;
2301 	user->macacl = eap_user->macacl;
2302 	user->ttls_auth = eap_user->ttls_auth;
2303 	user->remediation = eap_user->remediation;
2304 	rv = 0;
2305 
2306 out:
2307 	if (rv)
2308 		wpa_printf(MSG_DEBUG, "%s: Failed to find user", __func__);
2309 
2310 	return rv;
2311 }
2312 
2313 
ieee802_1x_sta_entry_alive(void * ctx,const u8 * addr)2314 static int ieee802_1x_sta_entry_alive(void *ctx, const u8 *addr)
2315 {
2316 	struct hostapd_data *hapd = ctx;
2317 	struct sta_info *sta;
2318 
2319 	sta = ap_get_sta(hapd, addr);
2320 	if (!sta || !sta->eapol_sm)
2321 		return 0;
2322 	return 1;
2323 }
2324 
2325 
ieee802_1x_logger(void * ctx,const u8 * addr,eapol_logger_level level,const char * txt)2326 static void ieee802_1x_logger(void *ctx, const u8 *addr,
2327 			      eapol_logger_level level, const char *txt)
2328 {
2329 #ifndef CONFIG_NO_HOSTAPD_LOGGER
2330 	struct hostapd_data *hapd = ctx;
2331 	int hlevel;
2332 
2333 	switch (level) {
2334 	case EAPOL_LOGGER_WARNING:
2335 		hlevel = HOSTAPD_LEVEL_WARNING;
2336 		break;
2337 	case EAPOL_LOGGER_INFO:
2338 		hlevel = HOSTAPD_LEVEL_INFO;
2339 		break;
2340 	case EAPOL_LOGGER_DEBUG:
2341 	default:
2342 		hlevel = HOSTAPD_LEVEL_DEBUG;
2343 		break;
2344 	}
2345 
2346 	hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE8021X, hlevel, "%s",
2347 		       txt);
2348 #endif /* CONFIG_NO_HOSTAPD_LOGGER */
2349 }
2350 
2351 
ieee802_1x_set_port_authorized(void * ctx,void * sta_ctx,int authorized)2352 static void ieee802_1x_set_port_authorized(void *ctx, void *sta_ctx,
2353 					   int authorized)
2354 {
2355 	struct hostapd_data *hapd = ctx;
2356 	struct sta_info *sta = sta_ctx;
2357 
2358 	ieee802_1x_set_sta_authorized(hapd, sta, authorized);
2359 }
2360 
2361 
_ieee802_1x_abort_auth(void * ctx,void * sta_ctx)2362 static void _ieee802_1x_abort_auth(void *ctx, void *sta_ctx)
2363 {
2364 	struct hostapd_data *hapd = ctx;
2365 	struct sta_info *sta = sta_ctx;
2366 
2367 	ieee802_1x_abort_auth(hapd, sta);
2368 }
2369 
2370 
2371 #ifdef CONFIG_WEP
_ieee802_1x_tx_key(void * ctx,void * sta_ctx)2372 static void _ieee802_1x_tx_key(void *ctx, void *sta_ctx)
2373 {
2374 #ifndef CONFIG_FIPS
2375 #ifndef CONFIG_NO_RC4
2376 	struct hostapd_data *hapd = ctx;
2377 	struct sta_info *sta = sta_ctx;
2378 
2379 	ieee802_1x_tx_key(hapd, sta);
2380 #endif /* CONFIG_NO_RC4 */
2381 #endif /* CONFIG_FIPS */
2382 }
2383 #endif /* CONFIG_WEP */
2384 
2385 
ieee802_1x_eapol_event(void * ctx,void * sta_ctx,enum eapol_event type)2386 static void ieee802_1x_eapol_event(void *ctx, void *sta_ctx,
2387 				   enum eapol_event type)
2388 {
2389 	/* struct hostapd_data *hapd = ctx; */
2390 	struct sta_info *sta = sta_ctx;
2391 
2392 	switch (type) {
2393 	case EAPOL_AUTH_SM_CHANGE:
2394 		wpa_auth_sm_notify(sta->wpa_sm);
2395 		break;
2396 	case EAPOL_AUTH_REAUTHENTICATE:
2397 		wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
2398 		break;
2399 	}
2400 }
2401 
2402 
2403 #ifdef CONFIG_ERP
2404 
2405 static struct eap_server_erp_key *
ieee802_1x_erp_get_key(void * ctx,const char * keyname)2406 ieee802_1x_erp_get_key(void *ctx, const char *keyname)
2407 {
2408 	struct hostapd_data *hapd = ctx;
2409 	struct eap_server_erp_key *erp;
2410 
2411 	dl_list_for_each(erp, &hapd->erp_keys, struct eap_server_erp_key,
2412 			 list) {
2413 		if (os_strcmp(erp->keyname_nai, keyname) == 0)
2414 			return erp;
2415 	}
2416 
2417 	return NULL;
2418 }
2419 
2420 
ieee802_1x_erp_add_key(void * ctx,struct eap_server_erp_key * erp)2421 static int ieee802_1x_erp_add_key(void *ctx, struct eap_server_erp_key *erp)
2422 {
2423 	struct hostapd_data *hapd = ctx;
2424 
2425 	dl_list_add(&hapd->erp_keys, &erp->list);
2426 	return 0;
2427 }
2428 
2429 #endif /* CONFIG_ERP */
2430 
2431 
ieee802_1x_init(struct hostapd_data * hapd)2432 int ieee802_1x_init(struct hostapd_data *hapd)
2433 {
2434 	struct eapol_auth_config conf;
2435 	struct eapol_auth_cb cb;
2436 
2437 	dl_list_init(&hapd->erp_keys);
2438 
2439 	os_memset(&conf, 0, sizeof(conf));
2440 	conf.eap_cfg = hapd->eap_cfg;
2441 	conf.ctx = hapd;
2442 	conf.eap_reauth_period = hapd->conf->eap_reauth_period;
2443 	conf.wpa = hapd->conf->wpa;
2444 #ifdef CONFIG_WEP
2445 	conf.individual_wep_key_len = hapd->conf->individual_wep_key_len;
2446 #endif /* CONFIG_WEP */
2447 	conf.eap_req_id_text = hapd->conf->eap_req_id_text;
2448 	conf.eap_req_id_text_len = hapd->conf->eap_req_id_text_len;
2449 	conf.erp_send_reauth_start = hapd->conf->erp_send_reauth_start;
2450 	conf.erp_domain = hapd->conf->erp_domain;
2451 
2452 	os_memset(&cb, 0, sizeof(cb));
2453 	cb.eapol_send = ieee802_1x_eapol_send;
2454 	cb.aaa_send = ieee802_1x_aaa_send;
2455 	cb.finished = _ieee802_1x_finished;
2456 	cb.get_eap_user = ieee802_1x_get_eap_user;
2457 	cb.sta_entry_alive = ieee802_1x_sta_entry_alive;
2458 	cb.logger = ieee802_1x_logger;
2459 	cb.set_port_authorized = ieee802_1x_set_port_authorized;
2460 	cb.abort_auth = _ieee802_1x_abort_auth;
2461 #ifdef CONFIG_WEP
2462 	cb.tx_key = _ieee802_1x_tx_key;
2463 #endif /* CONFIG_WEP */
2464 	cb.eapol_event = ieee802_1x_eapol_event;
2465 #ifdef CONFIG_ERP
2466 	cb.erp_get_key = ieee802_1x_erp_get_key;
2467 	cb.erp_add_key = ieee802_1x_erp_add_key;
2468 #endif /* CONFIG_ERP */
2469 
2470 	hapd->eapol_auth = eapol_auth_init(&conf, &cb);
2471 	if (!hapd->eapol_auth)
2472 		return -1;
2473 
2474 	if ((hapd->conf->ieee802_1x || hapd->conf->wpa) &&
2475 	    hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 1))
2476 		return -1;
2477 
2478 #ifndef CONFIG_NO_RADIUS
2479 	if (radius_client_register(hapd->radius, RADIUS_AUTH,
2480 				   ieee802_1x_receive_auth, hapd))
2481 		return -1;
2482 #endif /* CONFIG_NO_RADIUS */
2483 
2484 #ifdef CONFIG_WEP
2485 	if (hapd->conf->default_wep_key_len) {
2486 		int i;
2487 
2488 		for (i = 0; i < 4; i++)
2489 			hostapd_drv_set_key(hapd->conf->iface, hapd,
2490 					    WPA_ALG_NONE, NULL, i, 0, 0, NULL,
2491 					    0, NULL, 0, KEY_FLAG_GROUP);
2492 
2493 		ieee802_1x_rekey(hapd, NULL);
2494 
2495 		if (!hapd->eapol_auth->default_wep_key)
2496 			return -1;
2497 	}
2498 #endif /* CONFIG_WEP */
2499 
2500 	return 0;
2501 }
2502 
2503 
ieee802_1x_erp_flush(struct hostapd_data * hapd)2504 void ieee802_1x_erp_flush(struct hostapd_data *hapd)
2505 {
2506 	struct eap_server_erp_key *erp;
2507 
2508 	while ((erp = dl_list_first(&hapd->erp_keys, struct eap_server_erp_key,
2509 				    list)) != NULL) {
2510 		dl_list_del(&erp->list);
2511 		bin_clear_free(erp, sizeof(*erp));
2512 	}
2513 }
2514 
2515 
ieee802_1x_deinit(struct hostapd_data * hapd)2516 void ieee802_1x_deinit(struct hostapd_data *hapd)
2517 {
2518 #ifdef CONFIG_WEP
2519 	eloop_cancel_timeout(ieee802_1x_rekey, hapd, NULL);
2520 #endif /* CONFIG_WEP */
2521 
2522 	if (hapd->driver && hapd->drv_priv &&
2523 	    (hapd->conf->ieee802_1x || hapd->conf->wpa))
2524 		hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0);
2525 
2526 	eapol_auth_deinit(hapd->eapol_auth);
2527 	hapd->eapol_auth = NULL;
2528 
2529 	ieee802_1x_erp_flush(hapd);
2530 }
2531 
2532 
ieee802_1x_tx_status(struct hostapd_data * hapd,struct sta_info * sta,const u8 * buf,size_t len,int ack)2533 int ieee802_1x_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
2534 			 const u8 *buf, size_t len, int ack)
2535 {
2536 	struct ieee80211_hdr *hdr;
2537 	u8 *pos;
2538 	const unsigned char rfc1042_hdr[ETH_ALEN] =
2539 		{ 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
2540 
2541 	if (!sta)
2542 		return -1;
2543 	if (len < sizeof(*hdr) + sizeof(rfc1042_hdr) + 2)
2544 		return 0;
2545 
2546 	hdr = (struct ieee80211_hdr *) buf;
2547 	pos = (u8 *) (hdr + 1);
2548 	if (os_memcmp(pos, rfc1042_hdr, sizeof(rfc1042_hdr)) != 0)
2549 		return 0;
2550 	pos += sizeof(rfc1042_hdr);
2551 	if (WPA_GET_BE16(pos) != ETH_P_PAE)
2552 		return 0;
2553 	pos += 2;
2554 
2555 	return ieee802_1x_eapol_tx_status(hapd, sta, pos, buf + len - pos,
2556 					  ack);
2557 }
2558 
2559 
ieee802_1x_eapol_tx_status(struct hostapd_data * hapd,struct sta_info * sta,const u8 * buf,int len,int ack)2560 int ieee802_1x_eapol_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
2561 			       const u8 *buf, int len, int ack)
2562 {
2563 	const struct ieee802_1x_hdr *xhdr =
2564 		(const struct ieee802_1x_hdr *) buf;
2565 	const u8 *pos = buf + sizeof(*xhdr);
2566 	struct ieee802_1x_eapol_key *key;
2567 
2568 	if (len < (int) sizeof(*xhdr))
2569 		return 0;
2570 	wpa_printf(MSG_DEBUG, "IEEE 802.1X: " MACSTR
2571 		   " TX status - version=%d type=%d length=%d - ack=%d",
2572 		   MAC2STR(sta->addr), xhdr->version, xhdr->type,
2573 		   be_to_host16(xhdr->length), ack);
2574 
2575 #ifdef CONFIG_WPS
2576 	if (xhdr->type == IEEE802_1X_TYPE_EAP_PACKET && ack &&
2577 	    (sta->flags & WLAN_STA_WPS) &&
2578 	    ap_sta_pending_delayed_1x_auth_fail_disconnect(hapd, sta)) {
2579 		wpa_printf(MSG_DEBUG,
2580 			   "WPS: Indicate EAP completion on ACK for EAP-Failure");
2581 		hostapd_wps_eap_completed(hapd);
2582 	}
2583 #endif /* CONFIG_WPS */
2584 
2585 	if (xhdr->type != IEEE802_1X_TYPE_EAPOL_KEY)
2586 		return 0;
2587 
2588 	if (pos + sizeof(struct wpa_eapol_key) <= buf + len) {
2589 		const struct wpa_eapol_key *wpa;
2590 
2591 		wpa = (const struct wpa_eapol_key *) pos;
2592 		if (wpa->type == EAPOL_KEY_TYPE_RSN ||
2593 		    wpa->type == EAPOL_KEY_TYPE_WPA)
2594 			wpa_auth_eapol_key_tx_status(hapd->wpa_auth,
2595 						     sta->wpa_sm, ack);
2596 	}
2597 
2598 	/* EAPOL EAP-Packet packets are eventually re-sent by either Supplicant
2599 	 * or Authenticator state machines, but EAPOL-Key packets are not
2600 	 * retransmitted in case of failure. Try to re-send failed EAPOL-Key
2601 	 * packets couple of times because otherwise STA keys become
2602 	 * unsynchronized with AP. */
2603 	if (!ack && pos + sizeof(*key) <= buf + len) {
2604 		key = (struct ieee802_1x_eapol_key *) pos;
2605 		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
2606 			       HOSTAPD_LEVEL_DEBUG,
2607 			       "did not Ack EAPOL-Key frame (%scast index=%d)",
2608 			       key->key_index & BIT(7) ? "uni" : "broad",
2609 			       key->key_index & ~BIT(7));
2610 		/* TODO: re-send EAPOL-Key couple of times (with short delay
2611 		 * between them?). If all attempt fail, report error and
2612 		 * deauthenticate STA so that it will get new keys when
2613 		 * authenticating again (e.g., after returning in range).
2614 		 * Separate limit/transmit state needed both for unicast and
2615 		 * broadcast keys(?) */
2616 	}
2617 	/* TODO: could move unicast key configuration from ieee802_1x_tx_key()
2618 	 * to here and change the key only if the EAPOL-Key packet was Acked.
2619 	 */
2620 
2621 	return 1;
2622 }
2623 
2624 
ieee802_1x_get_identity(struct eapol_state_machine * sm,size_t * len)2625 u8 * ieee802_1x_get_identity(struct eapol_state_machine *sm, size_t *len)
2626 {
2627 	if (!sm || !sm->identity)
2628 		return NULL;
2629 
2630 	*len = sm->identity_len;
2631 	return sm->identity;
2632 }
2633 
2634 
ieee802_1x_get_radius_class(struct eapol_state_machine * sm,size_t * len,int idx)2635 u8 * ieee802_1x_get_radius_class(struct eapol_state_machine *sm, size_t *len,
2636 				 int idx)
2637 {
2638 	if (!sm || !sm->radius_class.attr ||
2639 	    idx >= (int) sm->radius_class.count)
2640 		return NULL;
2641 
2642 	*len = sm->radius_class.attr[idx].len;
2643 	return sm->radius_class.attr[idx].data;
2644 }
2645 
2646 
ieee802_1x_get_radius_cui(struct eapol_state_machine * sm)2647 struct wpabuf * ieee802_1x_get_radius_cui(struct eapol_state_machine *sm)
2648 {
2649 	if (!sm)
2650 		return NULL;
2651 	return sm->radius_cui;
2652 }
2653 
2654 
ieee802_1x_get_key(struct eapol_state_machine * sm,size_t * len)2655 const u8 * ieee802_1x_get_key(struct eapol_state_machine *sm, size_t *len)
2656 {
2657 	*len = 0;
2658 	if (!sm)
2659 		return NULL;
2660 
2661 	*len = sm->eap_if->eapKeyDataLen;
2662 	return sm->eap_if->eapKeyData;
2663 }
2664 
2665 
2666 #ifdef CONFIG_MACSEC
ieee802_1x_get_session_id(struct eapol_state_machine * sm,size_t * len)2667 const u8 * ieee802_1x_get_session_id(struct eapol_state_machine *sm,
2668 				     size_t *len)
2669 {
2670 	*len = 0;
2671 	if (!sm || !sm->eap_if)
2672 		return NULL;
2673 
2674 	*len = sm->eap_if->eapSessionIdLen;
2675 	return sm->eap_if->eapSessionId;
2676 }
2677 #endif /* CONFIG_MACSEC */
2678 
2679 
ieee802_1x_notify_port_enabled(struct eapol_state_machine * sm,bool enabled)2680 void ieee802_1x_notify_port_enabled(struct eapol_state_machine *sm,
2681 				    bool enabled)
2682 {
2683 	if (!sm)
2684 		return;
2685 	sm->eap_if->portEnabled = enabled;
2686 	eapol_auth_step(sm);
2687 }
2688 
2689 
ieee802_1x_notify_port_valid(struct eapol_state_machine * sm,bool valid)2690 void ieee802_1x_notify_port_valid(struct eapol_state_machine *sm, bool valid)
2691 {
2692 	if (!sm)
2693 		return;
2694 	sm->portValid = valid;
2695 	eapol_auth_step(sm);
2696 }
2697 
2698 
ieee802_1x_notify_pre_auth(struct eapol_state_machine * sm,bool pre_auth)2699 void ieee802_1x_notify_pre_auth(struct eapol_state_machine *sm, bool pre_auth)
2700 {
2701 	if (!sm)
2702 		return;
2703 	if (pre_auth)
2704 		sm->flags |= EAPOL_SM_PREAUTH;
2705 	else
2706 		sm->flags &= ~EAPOL_SM_PREAUTH;
2707 }
2708 
2709 
bool_txt(bool val)2710 static const char * bool_txt(bool val)
2711 {
2712 	return val ? "TRUE" : "FALSE";
2713 }
2714 
2715 
ieee802_1x_get_mib(struct hostapd_data * hapd,char * buf,size_t buflen)2716 int ieee802_1x_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
2717 {
2718 	/* TODO */
2719 	return 0;
2720 }
2721 
2722 
ieee802_1x_get_mib_sta(struct hostapd_data * hapd,struct sta_info * sta,char * buf,size_t buflen)2723 int ieee802_1x_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
2724 			   char *buf, size_t buflen)
2725 {
2726 	int len = 0, ret;
2727 	struct eapol_state_machine *sm = sta->eapol_sm;
2728 	struct os_reltime diff;
2729 	const char *name1;
2730 	const char *name2;
2731 	char *identity_buf = NULL;
2732 
2733 	if (!sm)
2734 		return 0;
2735 
2736 	ret = os_snprintf(buf + len, buflen - len,
2737 			  "dot1xPaePortNumber=%d\n"
2738 			  "dot1xPaePortProtocolVersion=%d\n"
2739 			  "dot1xPaePortCapabilities=1\n"
2740 			  "dot1xPaePortInitialize=%d\n"
2741 			  "dot1xPaePortReauthenticate=FALSE\n",
2742 			  sta->aid,
2743 			  EAPOL_VERSION,
2744 			  sm->initialize);
2745 	if (os_snprintf_error(buflen - len, ret))
2746 		return len;
2747 	len += ret;
2748 
2749 	/* dot1xAuthConfigTable */
2750 	ret = os_snprintf(buf + len, buflen - len,
2751 			  "dot1xAuthPaeState=%d\n"
2752 			  "dot1xAuthBackendAuthState=%d\n"
2753 			  "dot1xAuthAdminControlledDirections=%d\n"
2754 			  "dot1xAuthOperControlledDirections=%d\n"
2755 			  "dot1xAuthAuthControlledPortStatus=%d\n"
2756 			  "dot1xAuthAuthControlledPortControl=%d\n"
2757 			  "dot1xAuthQuietPeriod=%u\n"
2758 			  "dot1xAuthServerTimeout=%u\n"
2759 			  "dot1xAuthReAuthPeriod=%u\n"
2760 			  "dot1xAuthReAuthEnabled=%s\n"
2761 			  "dot1xAuthKeyTxEnabled=%s\n",
2762 			  sm->auth_pae_state + 1,
2763 			  sm->be_auth_state + 1,
2764 			  sm->adminControlledDirections,
2765 			  sm->operControlledDirections,
2766 			  sm->authPortStatus,
2767 			  sm->portControl,
2768 			  sm->quietPeriod,
2769 			  sm->serverTimeout,
2770 			  sm->reAuthPeriod,
2771 			  bool_txt(sm->reAuthEnabled),
2772 			  bool_txt(sm->keyTxEnabled));
2773 	if (os_snprintf_error(buflen - len, ret))
2774 		return len;
2775 	len += ret;
2776 
2777 	/* dot1xAuthStatsTable */
2778 	ret = os_snprintf(buf + len, buflen - len,
2779 			  "dot1xAuthEapolFramesRx=%u\n"
2780 			  "dot1xAuthEapolFramesTx=%u\n"
2781 			  "dot1xAuthEapolStartFramesRx=%u\n"
2782 			  "dot1xAuthEapolLogoffFramesRx=%u\n"
2783 			  "dot1xAuthEapolRespIdFramesRx=%u\n"
2784 			  "dot1xAuthEapolRespFramesRx=%u\n"
2785 			  "dot1xAuthEapolReqIdFramesTx=%u\n"
2786 			  "dot1xAuthEapolReqFramesTx=%u\n"
2787 			  "dot1xAuthInvalidEapolFramesRx=%u\n"
2788 			  "dot1xAuthEapLengthErrorFramesRx=%u\n"
2789 			  "dot1xAuthLastEapolFrameVersion=%u\n"
2790 			  "dot1xAuthLastEapolFrameSource=" MACSTR "\n",
2791 			  sm->dot1xAuthEapolFramesRx,
2792 			  sm->dot1xAuthEapolFramesTx,
2793 			  sm->dot1xAuthEapolStartFramesRx,
2794 			  sm->dot1xAuthEapolLogoffFramesRx,
2795 			  sm->dot1xAuthEapolRespIdFramesRx,
2796 			  sm->dot1xAuthEapolRespFramesRx,
2797 			  sm->dot1xAuthEapolReqIdFramesTx,
2798 			  sm->dot1xAuthEapolReqFramesTx,
2799 			  sm->dot1xAuthInvalidEapolFramesRx,
2800 			  sm->dot1xAuthEapLengthErrorFramesRx,
2801 			  sm->dot1xAuthLastEapolFrameVersion,
2802 			  MAC2STR(sm->addr));
2803 	if (os_snprintf_error(buflen - len, ret))
2804 		return len;
2805 	len += ret;
2806 
2807 	/* dot1xAuthDiagTable */
2808 	ret = os_snprintf(buf + len, buflen - len,
2809 			  "dot1xAuthEntersConnecting=%u\n"
2810 			  "dot1xAuthEapLogoffsWhileConnecting=%u\n"
2811 			  "dot1xAuthEntersAuthenticating=%u\n"
2812 			  "dot1xAuthAuthSuccessesWhileAuthenticating=%u\n"
2813 			  "dot1xAuthAuthTimeoutsWhileAuthenticating=%u\n"
2814 			  "dot1xAuthAuthFailWhileAuthenticating=%u\n"
2815 			  "dot1xAuthAuthEapStartsWhileAuthenticating=%u\n"
2816 			  "dot1xAuthAuthEapLogoffWhileAuthenticating=%u\n"
2817 			  "dot1xAuthAuthReauthsWhileAuthenticated=%u\n"
2818 			  "dot1xAuthAuthEapStartsWhileAuthenticated=%u\n"
2819 			  "dot1xAuthAuthEapLogoffWhileAuthenticated=%u\n"
2820 			  "dot1xAuthBackendResponses=%u\n"
2821 			  "dot1xAuthBackendAccessChallenges=%u\n"
2822 			  "dot1xAuthBackendOtherRequestsToSupplicant=%u\n"
2823 			  "dot1xAuthBackendAuthSuccesses=%u\n"
2824 			  "dot1xAuthBackendAuthFails=%u\n",
2825 			  sm->authEntersConnecting,
2826 			  sm->authEapLogoffsWhileConnecting,
2827 			  sm->authEntersAuthenticating,
2828 			  sm->authAuthSuccessesWhileAuthenticating,
2829 			  sm->authAuthTimeoutsWhileAuthenticating,
2830 			  sm->authAuthFailWhileAuthenticating,
2831 			  sm->authAuthEapStartsWhileAuthenticating,
2832 			  sm->authAuthEapLogoffWhileAuthenticating,
2833 			  sm->authAuthReauthsWhileAuthenticated,
2834 			  sm->authAuthEapStartsWhileAuthenticated,
2835 			  sm->authAuthEapLogoffWhileAuthenticated,
2836 			  sm->backendResponses,
2837 			  sm->backendAccessChallenges,
2838 			  sm->backendOtherRequestsToSupplicant,
2839 			  sm->backendAuthSuccesses,
2840 			  sm->backendAuthFails);
2841 	if (os_snprintf_error(buflen - len, ret))
2842 		return len;
2843 	len += ret;
2844 
2845 	/* dot1xAuthSessionStatsTable */
2846 	os_reltime_age(&sta->acct_session_start, &diff);
2847 	if (sm->eap && !sm->identity) {
2848 		const u8 *id;
2849 		size_t id_len;
2850 
2851 		id = eap_get_identity(sm->eap, &id_len);
2852 		if (id)
2853 			identity_buf = dup_binstr(id, id_len);
2854 	}
2855 	ret = os_snprintf(buf + len, buflen - len,
2856 			  /* TODO: dot1xAuthSessionOctetsRx */
2857 			  /* TODO: dot1xAuthSessionOctetsTx */
2858 			  /* TODO: dot1xAuthSessionFramesRx */
2859 			  /* TODO: dot1xAuthSessionFramesTx */
2860 			  "dot1xAuthSessionId=%016llX\n"
2861 			  "dot1xAuthSessionAuthenticMethod=%d\n"
2862 			  "dot1xAuthSessionTime=%u\n"
2863 			  "dot1xAuthSessionTerminateCause=999\n"
2864 			  "dot1xAuthSessionUserName=%s\n",
2865 			  (unsigned long long) sta->acct_session_id,
2866 			  (wpa_key_mgmt_wpa_ieee8021x(
2867 				   wpa_auth_sta_key_mgmt(sta->wpa_sm))) ?
2868 			  1 : 2,
2869 			  (unsigned int) diff.sec,
2870 			  sm->identity ? (char *) sm->identity :
2871 					 (identity_buf ? identity_buf : "N/A"));
2872 	os_free(identity_buf);
2873 	if (os_snprintf_error(buflen - len, ret))
2874 		return len;
2875 	len += ret;
2876 
2877 	if (sm->acct_multi_session_id) {
2878 		ret = os_snprintf(buf + len, buflen - len,
2879 				  "authMultiSessionId=%016llX\n",
2880 				  (unsigned long long)
2881 				  sm->acct_multi_session_id);
2882 		if (os_snprintf_error(buflen - len, ret))
2883 			return len;
2884 		len += ret;
2885 	}
2886 
2887 	name1 = eap_server_get_name(0, sm->eap_type_authsrv);
2888 	name2 = eap_server_get_name(0, sm->eap_type_supp);
2889 	ret = os_snprintf(buf + len, buflen - len,
2890 			  "last_eap_type_as=%d (%s)\n"
2891 			  "last_eap_type_sta=%d (%s)\n",
2892 			  sm->eap_type_authsrv, name1,
2893 			  sm->eap_type_supp, name2);
2894 	if (os_snprintf_error(buflen - len, ret))
2895 		return len;
2896 	len += ret;
2897 
2898 	return len;
2899 }
2900 
2901 
2902 #ifdef CONFIG_HS20
ieee802_1x_wnm_notif_send(void * eloop_ctx,void * timeout_ctx)2903 static void ieee802_1x_wnm_notif_send(void *eloop_ctx, void *timeout_ctx)
2904 {
2905 	struct hostapd_data *hapd = eloop_ctx;
2906 	struct sta_info *sta = timeout_ctx;
2907 
2908 	if (sta->remediation) {
2909 		wpa_printf(MSG_DEBUG, "HS 2.0: Send WNM-Notification to "
2910 			   MACSTR " to indicate Subscription Remediation",
2911 			   MAC2STR(sta->addr));
2912 		hs20_send_wnm_notification(hapd, sta->addr,
2913 					   sta->remediation_method,
2914 					   sta->remediation_url);
2915 		os_free(sta->remediation_url);
2916 		sta->remediation_url = NULL;
2917 	}
2918 
2919 	if (sta->hs20_deauth_req) {
2920 		wpa_printf(MSG_DEBUG, "HS 2.0: Send WNM-Notification to "
2921 			   MACSTR " to indicate imminent deauthentication",
2922 			   MAC2STR(sta->addr));
2923 		hs20_send_wnm_notification_deauth_req(hapd, sta->addr,
2924 						      sta->hs20_deauth_req);
2925 	}
2926 
2927 	if (sta->hs20_t_c_filtering) {
2928 		wpa_printf(MSG_DEBUG, "HS 2.0: Send WNM-Notification to "
2929 			   MACSTR " to indicate Terms and Conditions filtering",
2930 			   MAC2STR(sta->addr));
2931 		hs20_send_wnm_notification_t_c(hapd, sta->addr, sta->t_c_url);
2932 		os_free(sta->t_c_url);
2933 		sta->t_c_url = NULL;
2934 	}
2935 }
2936 #endif /* CONFIG_HS20 */
2937 
2938 
ieee802_1x_finished(struct hostapd_data * hapd,struct sta_info * sta,int success,int remediation)2939 static void ieee802_1x_finished(struct hostapd_data *hapd,
2940 				struct sta_info *sta, int success,
2941 				int remediation)
2942 {
2943 	const u8 *key;
2944 	size_t len;
2945 	/* TODO: get PMKLifetime from WPA parameters */
2946 	static const int dot11RSNAConfigPMKLifetime = 43200;
2947 	unsigned int session_timeout;
2948 	struct os_reltime now, remaining;
2949 
2950 #ifdef CONFIG_HS20
2951 	if (remediation && !sta->remediation) {
2952 		sta->remediation = 1;
2953 		os_free(sta->remediation_url);
2954 		sta->remediation_url =
2955 			os_strdup(hapd->conf->subscr_remediation_url);
2956 		sta->remediation_method = 1; /* SOAP-XML SPP */
2957 	}
2958 
2959 	if (success && (sta->remediation || sta->hs20_deauth_req ||
2960 			sta->hs20_t_c_filtering)) {
2961 		wpa_printf(MSG_DEBUG, "HS 2.0: Schedule WNM-Notification to "
2962 			   MACSTR " in 100 ms", MAC2STR(sta->addr));
2963 		eloop_cancel_timeout(ieee802_1x_wnm_notif_send, hapd, sta);
2964 		eloop_register_timeout(0, 100000, ieee802_1x_wnm_notif_send,
2965 				       hapd, sta);
2966 	}
2967 #endif /* CONFIG_HS20 */
2968 
2969 #ifdef CONFIG_MACSEC
2970 	ieee802_1x_notify_create_actor_hapd(hapd, sta);
2971 #endif /* CONFIG_MACSEC */
2972 
2973 	key = ieee802_1x_get_key(sta->eapol_sm, &len);
2974 	if (sta->session_timeout_set) {
2975 		os_get_reltime(&now);
2976 		os_reltime_sub(&sta->session_timeout, &now, &remaining);
2977 		session_timeout = (remaining.sec > 0) ? remaining.sec : 1;
2978 	} else {
2979 		session_timeout = dot11RSNAConfigPMKLifetime;
2980 	}
2981 	if (success && key && len >= PMK_LEN && !sta->remediation &&
2982 	    !sta->hs20_deauth_requested &&
2983 	    wpa_auth_pmksa_add(sta->wpa_sm, key, len, session_timeout,
2984 			       sta->eapol_sm) == 0) {
2985 		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
2986 			       HOSTAPD_LEVEL_DEBUG,
2987 			       "Added PMKSA cache entry (IEEE 802.1X)");
2988 	}
2989 
2990 	if (!success) {
2991 		/*
2992 		 * Many devices require deauthentication after WPS provisioning
2993 		 * and some may not be be able to do that themselves, so
2994 		 * disconnect the client here. In addition, this may also
2995 		 * benefit IEEE 802.1X/EAPOL authentication cases, too since
2996 		 * the EAPOL PAE state machine would remain in HELD state for
2997 		 * considerable amount of time and some EAP methods, like
2998 		 * EAP-FAST with anonymous provisioning, may require another
2999 		 * EAPOL authentication to be started to complete connection.
3000 		 */
3001 		ap_sta_delayed_1x_auth_fail_disconnect(hapd, sta);
3002 	}
3003 }
3004