1/*
2 * hostapd / IEEE 802.1X-2004 Authenticator
3 * Copyright (c) 2002-2012, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9#include "utils/includes.h"
10
11#include "utils/common.h"
12#include "utils/eloop.h"
13#include "crypto/md5.h"
14#include "crypto/crypto.h"
15#include "crypto/random.h"
16#include "common/ieee802_11_defs.h"
17#include "radius/radius.h"
18#include "radius/radius_client.h"
19#include "eap_server/eap.h"
20#include "eap_common/eap_wsc_common.h"
21#include "eapol_auth/eapol_auth_sm.h"
22#include "eapol_auth/eapol_auth_sm_i.h"
23#include "p2p/p2p.h"
24#include "hostapd.h"
25#include "accounting.h"
26#include "sta_info.h"
27#include "wpa_auth.h"
28#include "preauth_auth.h"
29#include "pmksa_cache_auth.h"
30#include "ap_config.h"
31#include "ap_drv_ops.h"
32#include "ieee802_1x.h"
33
34
35static void ieee802_1x_finished(struct hostapd_data *hapd,
36				struct sta_info *sta, int success);
37
38
39static void ieee802_1x_send(struct hostapd_data *hapd, struct sta_info *sta,
40			    u8 type, const u8 *data, size_t datalen)
41{
42	u8 *buf;
43	struct ieee802_1x_hdr *xhdr;
44	size_t len;
45	int encrypt = 0;
46
47	len = sizeof(*xhdr) + datalen;
48	buf = os_zalloc(len);
49	if (buf == NULL) {
50		wpa_printf(MSG_ERROR, "malloc() failed for "
51			   "ieee802_1x_send(len=%lu)",
52			   (unsigned long) len);
53		return;
54	}
55
56	xhdr = (struct ieee802_1x_hdr *) buf;
57	xhdr->version = hapd->conf->eapol_version;
58	xhdr->type = type;
59	xhdr->length = host_to_be16(datalen);
60
61	if (datalen > 0 && data != NULL)
62		os_memcpy(xhdr + 1, data, datalen);
63
64	if (wpa_auth_pairwise_set(sta->wpa_sm))
65		encrypt = 1;
66	if (sta->flags & WLAN_STA_PREAUTH) {
67		rsn_preauth_send(hapd, sta, buf, len);
68	} else {
69		hostapd_drv_hapd_send_eapol(
70			hapd, sta->addr, buf, len,
71			encrypt, hostapd_sta_flags_to_drv(sta->flags));
72	}
73
74	os_free(buf);
75}
76
77
78void ieee802_1x_set_sta_authorized(struct hostapd_data *hapd,
79				   struct sta_info *sta, int authorized)
80{
81	int res;
82
83	if (sta->flags & WLAN_STA_PREAUTH)
84		return;
85
86	if (authorized) {
87		ap_sta_set_authorized(hapd, sta, 1);
88		res = hostapd_set_authorized(hapd, sta, 1);
89		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
90			       HOSTAPD_LEVEL_DEBUG, "authorizing port");
91	} else {
92		ap_sta_set_authorized(hapd, sta, 0);
93		res = hostapd_set_authorized(hapd, sta, 0);
94		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
95			       HOSTAPD_LEVEL_DEBUG, "unauthorizing port");
96	}
97
98	if (res && errno != ENOENT) {
99		printf("Could not set station " MACSTR " flags for kernel "
100		       "driver (errno=%d).\n", MAC2STR(sta->addr), errno);
101	}
102
103	if (authorized) {
104		os_get_time(&sta->connected_time);
105		accounting_sta_start(hapd, sta);
106	}
107}
108
109
110static void ieee802_1x_tx_key_one(struct hostapd_data *hapd,
111				  struct sta_info *sta,
112				  int idx, int broadcast,
113				  u8 *key_data, size_t key_len)
114{
115	u8 *buf, *ekey;
116	struct ieee802_1x_hdr *hdr;
117	struct ieee802_1x_eapol_key *key;
118	size_t len, ekey_len;
119	struct eapol_state_machine *sm = sta->eapol_sm;
120
121	if (sm == NULL)
122		return;
123
124	len = sizeof(*key) + key_len;
125	buf = os_zalloc(sizeof(*hdr) + len);
126	if (buf == NULL)
127		return;
128
129	hdr = (struct ieee802_1x_hdr *) buf;
130	key = (struct ieee802_1x_eapol_key *) (hdr + 1);
131	key->type = EAPOL_KEY_TYPE_RC4;
132	WPA_PUT_BE16(key->key_length, key_len);
133	wpa_get_ntp_timestamp(key->replay_counter);
134
135	if (random_get_bytes(key->key_iv, sizeof(key->key_iv))) {
136		wpa_printf(MSG_ERROR, "Could not get random numbers");
137		os_free(buf);
138		return;
139	}
140
141	key->key_index = idx | (broadcast ? 0 : BIT(7));
142	if (hapd->conf->eapol_key_index_workaround) {
143		/* According to some information, WinXP Supplicant seems to
144		 * interpret bit7 as an indication whether the key is to be
145		 * activated, so make it possible to enable workaround that
146		 * sets this bit for all keys. */
147		key->key_index |= BIT(7);
148	}
149
150	/* Key is encrypted using "Key-IV + MSK[0..31]" as the RC4-key and
151	 * MSK[32..63] is used to sign the message. */
152	if (sm->eap_if->eapKeyData == NULL || sm->eap_if->eapKeyDataLen < 64) {
153		wpa_printf(MSG_ERROR, "No eapKeyData available for encrypting "
154			   "and signing EAPOL-Key");
155		os_free(buf);
156		return;
157	}
158	os_memcpy((u8 *) (key + 1), key_data, key_len);
159	ekey_len = sizeof(key->key_iv) + 32;
160	ekey = os_malloc(ekey_len);
161	if (ekey == NULL) {
162		wpa_printf(MSG_ERROR, "Could not encrypt key");
163		os_free(buf);
164		return;
165	}
166	os_memcpy(ekey, key->key_iv, sizeof(key->key_iv));
167	os_memcpy(ekey + sizeof(key->key_iv), sm->eap_if->eapKeyData, 32);
168	rc4_skip(ekey, ekey_len, 0, (u8 *) (key + 1), key_len);
169	os_free(ekey);
170
171	/* This header is needed here for HMAC-MD5, but it will be regenerated
172	 * in ieee802_1x_send() */
173	hdr->version = hapd->conf->eapol_version;
174	hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
175	hdr->length = host_to_be16(len);
176	hmac_md5(sm->eap_if->eapKeyData + 32, 32, buf, sizeof(*hdr) + len,
177		 key->key_signature);
178
179	wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key to " MACSTR
180		   " (%s index=%d)", MAC2STR(sm->addr),
181		   broadcast ? "broadcast" : "unicast", idx);
182	ieee802_1x_send(hapd, sta, IEEE802_1X_TYPE_EAPOL_KEY, (u8 *) key, len);
183	if (sta->eapol_sm)
184		sta->eapol_sm->dot1xAuthEapolFramesTx++;
185	os_free(buf);
186}
187
188
189void ieee802_1x_tx_key(struct hostapd_data *hapd, struct sta_info *sta)
190{
191	struct eapol_authenticator *eapol = hapd->eapol_auth;
192	struct eapol_state_machine *sm = sta->eapol_sm;
193
194	if (sm == NULL || !sm->eap_if->eapKeyData)
195		return;
196
197	wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key(s) to " MACSTR,
198		   MAC2STR(sta->addr));
199
200#ifndef CONFIG_NO_VLAN
201	if (sta->vlan_id > 0 && sta->vlan_id <= MAX_VLAN_ID) {
202		wpa_printf(MSG_ERROR, "Using WEP with vlans is not supported.");
203		return;
204	}
205#endif /* CONFIG_NO_VLAN */
206
207	if (eapol->default_wep_key) {
208		ieee802_1x_tx_key_one(hapd, sta, eapol->default_wep_key_idx, 1,
209				      eapol->default_wep_key,
210				      hapd->conf->default_wep_key_len);
211	}
212
213	if (hapd->conf->individual_wep_key_len > 0) {
214		u8 *ikey;
215		ikey = os_malloc(hapd->conf->individual_wep_key_len);
216		if (ikey == NULL ||
217		    random_get_bytes(ikey, hapd->conf->individual_wep_key_len))
218		{
219			wpa_printf(MSG_ERROR, "Could not generate random "
220				   "individual WEP key.");
221			os_free(ikey);
222			return;
223		}
224
225		wpa_hexdump_key(MSG_DEBUG, "Individual WEP key",
226				ikey, hapd->conf->individual_wep_key_len);
227
228		ieee802_1x_tx_key_one(hapd, sta, 0, 0, ikey,
229				      hapd->conf->individual_wep_key_len);
230
231		/* TODO: set encryption in TX callback, i.e., only after STA
232		 * has ACKed EAPOL-Key frame */
233		if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
234					sta->addr, 0, 1, NULL, 0, ikey,
235					hapd->conf->individual_wep_key_len)) {
236			wpa_printf(MSG_ERROR, "Could not set individual WEP "
237				   "encryption.");
238		}
239
240		os_free(ikey);
241	}
242}
243
244
245const char *radius_mode_txt(struct hostapd_data *hapd)
246{
247	switch (hapd->iface->conf->hw_mode) {
248	case HOSTAPD_MODE_IEEE80211AD:
249		return "802.11ad";
250	case HOSTAPD_MODE_IEEE80211A:
251		return "802.11a";
252	case HOSTAPD_MODE_IEEE80211G:
253		return "802.11g";
254	case HOSTAPD_MODE_IEEE80211B:
255	default:
256		return "802.11b";
257	}
258}
259
260
261int radius_sta_rate(struct hostapd_data *hapd, struct sta_info *sta)
262{
263	int i;
264	u8 rate = 0;
265
266	for (i = 0; i < sta->supported_rates_len; i++)
267		if ((sta->supported_rates[i] & 0x7f) > rate)
268			rate = sta->supported_rates[i] & 0x7f;
269
270	return rate;
271}
272
273
274#ifndef CONFIG_NO_RADIUS
275static void ieee802_1x_learn_identity(struct hostapd_data *hapd,
276				      struct eapol_state_machine *sm,
277				      const u8 *eap, size_t len)
278{
279	const u8 *identity;
280	size_t identity_len;
281
282	if (len <= sizeof(struct eap_hdr) ||
283	    eap[sizeof(struct eap_hdr)] != EAP_TYPE_IDENTITY)
284		return;
285
286	identity = eap_get_identity(sm->eap, &identity_len);
287	if (identity == NULL)
288		return;
289
290	/* Save station identity for future RADIUS packets */
291	os_free(sm->identity);
292	sm->identity = (u8 *) dup_binstr(identity, identity_len);
293	if (sm->identity == NULL) {
294		sm->identity_len = 0;
295		return;
296	}
297
298	sm->identity_len = identity_len;
299	hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
300		       HOSTAPD_LEVEL_DEBUG, "STA identity '%s'", sm->identity);
301	sm->dot1xAuthEapolRespIdFramesRx++;
302}
303
304
305static int add_common_radius_sta_attr(struct hostapd_data *hapd,
306				      struct hostapd_radius_attr *req_attr,
307				      struct sta_info *sta,
308				      struct radius_msg *msg)
309{
310	char buf[128];
311
312	if (!hostapd_config_get_radius_attr(req_attr,
313					    RADIUS_ATTR_NAS_PORT) &&
314	    !radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT, sta->aid)) {
315		wpa_printf(MSG_ERROR, "Could not add NAS-Port");
316		return -1;
317	}
318
319	os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
320		    MAC2STR(sta->addr));
321	buf[sizeof(buf) - 1] = '\0';
322	if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID,
323				 (u8 *) buf, os_strlen(buf))) {
324		wpa_printf(MSG_ERROR, "Could not add Calling-Station-Id");
325		return -1;
326	}
327
328	if (sta->flags & WLAN_STA_PREAUTH) {
329		os_strlcpy(buf, "IEEE 802.11i Pre-Authentication",
330			   sizeof(buf));
331	} else {
332		os_snprintf(buf, sizeof(buf), "CONNECT %d%sMbps %s",
333			    radius_sta_rate(hapd, sta) / 2,
334			    (radius_sta_rate(hapd, sta) & 1) ? ".5" : "",
335			    radius_mode_txt(hapd));
336		buf[sizeof(buf) - 1] = '\0';
337	}
338	if (!hostapd_config_get_radius_attr(req_attr,
339					    RADIUS_ATTR_CONNECT_INFO) &&
340	    !radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO,
341				 (u8 *) buf, os_strlen(buf))) {
342		wpa_printf(MSG_ERROR, "Could not add Connect-Info");
343		return -1;
344	}
345
346	if (sta->acct_session_id_hi || sta->acct_session_id_lo) {
347		os_snprintf(buf, sizeof(buf), "%08X-%08X",
348			    sta->acct_session_id_hi, sta->acct_session_id_lo);
349		if (!radius_msg_add_attr(msg, RADIUS_ATTR_ACCT_SESSION_ID,
350					 (u8 *) buf, os_strlen(buf))) {
351			wpa_printf(MSG_ERROR, "Could not add Acct-Session-Id");
352			return -1;
353		}
354	}
355
356	return 0;
357}
358
359
360int add_common_radius_attr(struct hostapd_data *hapd,
361			   struct hostapd_radius_attr *req_attr,
362			   struct sta_info *sta,
363			   struct radius_msg *msg)
364{
365	char buf[128];
366	struct hostapd_radius_attr *attr;
367
368	if (!hostapd_config_get_radius_attr(req_attr,
369					    RADIUS_ATTR_NAS_IP_ADDRESS) &&
370	    hapd->conf->own_ip_addr.af == AF_INET &&
371	    !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS,
372				 (u8 *) &hapd->conf->own_ip_addr.u.v4, 4)) {
373		wpa_printf(MSG_ERROR, "Could not add NAS-IP-Address");
374		return -1;
375	}
376
377#ifdef CONFIG_IPV6
378	if (!hostapd_config_get_radius_attr(req_attr,
379					    RADIUS_ATTR_NAS_IPV6_ADDRESS) &&
380	    hapd->conf->own_ip_addr.af == AF_INET6 &&
381	    !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IPV6_ADDRESS,
382				 (u8 *) &hapd->conf->own_ip_addr.u.v6, 16)) {
383		wpa_printf(MSG_ERROR, "Could not add NAS-IPv6-Address");
384		return -1;
385	}
386#endif /* CONFIG_IPV6 */
387
388	if (!hostapd_config_get_radius_attr(req_attr,
389					    RADIUS_ATTR_NAS_IDENTIFIER) &&
390	    hapd->conf->nas_identifier &&
391	    !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IDENTIFIER,
392				 (u8 *) hapd->conf->nas_identifier,
393				 os_strlen(hapd->conf->nas_identifier))) {
394		wpa_printf(MSG_ERROR, "Could not add NAS-Identifier");
395		return -1;
396	}
397
398	os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT ":%s",
399		    MAC2STR(hapd->own_addr),
400		    wpa_ssid_txt(hapd->conf->ssid.ssid,
401				 hapd->conf->ssid.ssid_len));
402	buf[sizeof(buf) - 1] = '\0';
403	if (!hostapd_config_get_radius_attr(req_attr,
404					    RADIUS_ATTR_CALLED_STATION_ID) &&
405	    !radius_msg_add_attr(msg, RADIUS_ATTR_CALLED_STATION_ID,
406				 (u8 *) buf, os_strlen(buf))) {
407		wpa_printf(MSG_ERROR, "Could not add Called-Station-Id");
408		return -1;
409	}
410
411	if (!hostapd_config_get_radius_attr(req_attr,
412					    RADIUS_ATTR_NAS_PORT_TYPE) &&
413	    !radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT_TYPE,
414				       RADIUS_NAS_PORT_TYPE_IEEE_802_11)) {
415		wpa_printf(MSG_ERROR, "Could not add NAS-Port-Type");
416		return -1;
417	}
418
419	if (sta && add_common_radius_sta_attr(hapd, req_attr, sta, msg) < 0)
420		return -1;
421
422	for (attr = req_attr; attr; attr = attr->next) {
423		if (!radius_msg_add_attr(msg, attr->type,
424					 wpabuf_head(attr->val),
425					 wpabuf_len(attr->val))) {
426			wpa_printf(MSG_ERROR, "Could not add RADIUS "
427				   "attribute");
428			return -1;
429		}
430	}
431
432	return 0;
433}
434
435
436static void ieee802_1x_encapsulate_radius(struct hostapd_data *hapd,
437					  struct sta_info *sta,
438					  const u8 *eap, size_t len)
439{
440	struct radius_msg *msg;
441	struct eapol_state_machine *sm = sta->eapol_sm;
442
443	if (sm == NULL)
444		return;
445
446	ieee802_1x_learn_identity(hapd, sm, eap, len);
447
448	wpa_printf(MSG_DEBUG, "Encapsulating EAP message into a RADIUS "
449		   "packet");
450
451	sm->radius_identifier = radius_client_get_id(hapd->radius);
452	msg = radius_msg_new(RADIUS_CODE_ACCESS_REQUEST,
453			     sm->radius_identifier);
454	if (msg == NULL) {
455		printf("Could not create net RADIUS packet\n");
456		return;
457	}
458
459	radius_msg_make_authenticator(msg, (u8 *) sta, sizeof(*sta));
460
461	if (sm->identity &&
462	    !radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME,
463				 sm->identity, sm->identity_len)) {
464		printf("Could not add User-Name\n");
465		goto fail;
466	}
467
468	if (add_common_radius_attr(hapd, hapd->conf->radius_auth_req_attr, sta,
469				   msg) < 0)
470		goto fail;
471
472	/* TODO: should probably check MTU from driver config; 2304 is max for
473	 * IEEE 802.11, but use 1400 to avoid problems with too large packets
474	 */
475	if (!hostapd_config_get_radius_attr(hapd->conf->radius_auth_req_attr,
476					    RADIUS_ATTR_FRAMED_MTU) &&
477	    !radius_msg_add_attr_int32(msg, RADIUS_ATTR_FRAMED_MTU, 1400)) {
478		printf("Could not add Framed-MTU\n");
479		goto fail;
480	}
481
482	if (eap && !radius_msg_add_eap(msg, eap, len)) {
483		printf("Could not add EAP-Message\n");
484		goto fail;
485	}
486
487	/* State attribute must be copied if and only if this packet is
488	 * Access-Request reply to the previous Access-Challenge */
489	if (sm->last_recv_radius &&
490	    radius_msg_get_hdr(sm->last_recv_radius)->code ==
491	    RADIUS_CODE_ACCESS_CHALLENGE) {
492		int res = radius_msg_copy_attr(msg, sm->last_recv_radius,
493					       RADIUS_ATTR_STATE);
494		if (res < 0) {
495			printf("Could not copy State attribute from previous "
496			       "Access-Challenge\n");
497			goto fail;
498		}
499		if (res > 0) {
500			wpa_printf(MSG_DEBUG, "Copied RADIUS State Attribute");
501		}
502	}
503
504	if (hapd->conf->radius_request_cui) {
505		const u8 *cui;
506		size_t cui_len;
507		/* Add previously learned CUI or nul CUI to request CUI */
508		if (sm->radius_cui) {
509			cui = wpabuf_head(sm->radius_cui);
510			cui_len = wpabuf_len(sm->radius_cui);
511		} else {
512			cui = (const u8 *) "\0";
513			cui_len = 1;
514		}
515		if (!radius_msg_add_attr(msg,
516					 RADIUS_ATTR_CHARGEABLE_USER_IDENTITY,
517					 cui, cui_len)) {
518			wpa_printf(MSG_ERROR, "Could not add CUI");
519			goto fail;
520		}
521	}
522
523	if (radius_client_send(hapd->radius, msg, RADIUS_AUTH, sta->addr) < 0)
524		goto fail;
525
526	return;
527
528 fail:
529	radius_msg_free(msg);
530}
531#endif /* CONFIG_NO_RADIUS */
532
533
534static void handle_eap_response(struct hostapd_data *hapd,
535				struct sta_info *sta, struct eap_hdr *eap,
536				size_t len)
537{
538	u8 type, *data;
539	struct eapol_state_machine *sm = sta->eapol_sm;
540	if (sm == NULL)
541		return;
542
543	data = (u8 *) (eap + 1);
544
545	if (len < sizeof(*eap) + 1) {
546		printf("handle_eap_response: too short response data\n");
547		return;
548	}
549
550	sm->eap_type_supp = type = data[0];
551
552	hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
553		       HOSTAPD_LEVEL_DEBUG, "received EAP packet (code=%d "
554		       "id=%d len=%d) from STA: EAP Response-%s (%d)",
555		       eap->code, eap->identifier, be_to_host16(eap->length),
556		       eap_server_get_name(0, type), type);
557
558	sm->dot1xAuthEapolRespFramesRx++;
559
560	wpabuf_free(sm->eap_if->eapRespData);
561	sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len);
562	sm->eapolEap = TRUE;
563}
564
565
566/* Process incoming EAP packet from Supplicant */
567static void handle_eap(struct hostapd_data *hapd, struct sta_info *sta,
568		       u8 *buf, size_t len)
569{
570	struct eap_hdr *eap;
571	u16 eap_len;
572
573	if (len < sizeof(*eap)) {
574		printf("   too short EAP packet\n");
575		return;
576	}
577
578	eap = (struct eap_hdr *) buf;
579
580	eap_len = be_to_host16(eap->length);
581	wpa_printf(MSG_DEBUG, "EAP: code=%d identifier=%d length=%d",
582		   eap->code, eap->identifier, eap_len);
583	if (eap_len < sizeof(*eap)) {
584		wpa_printf(MSG_DEBUG, "   Invalid EAP length");
585		return;
586	} else if (eap_len > len) {
587		wpa_printf(MSG_DEBUG, "   Too short frame to contain this EAP "
588			   "packet");
589		return;
590	} else if (eap_len < len) {
591		wpa_printf(MSG_DEBUG, "   Ignoring %lu extra bytes after EAP "
592			   "packet", (unsigned long) len - eap_len);
593	}
594
595	switch (eap->code) {
596	case EAP_CODE_REQUEST:
597		wpa_printf(MSG_DEBUG, " (request)");
598		return;
599	case EAP_CODE_RESPONSE:
600		wpa_printf(MSG_DEBUG, " (response)");
601		handle_eap_response(hapd, sta, eap, eap_len);
602		break;
603	case EAP_CODE_SUCCESS:
604		wpa_printf(MSG_DEBUG, " (success)");
605		return;
606	case EAP_CODE_FAILURE:
607		wpa_printf(MSG_DEBUG, " (failure)");
608		return;
609	default:
610		wpa_printf(MSG_DEBUG, " (unknown code)");
611		return;
612	}
613}
614
615
616static struct eapol_state_machine *
617ieee802_1x_alloc_eapol_sm(struct hostapd_data *hapd, struct sta_info *sta)
618{
619	int flags = 0;
620	if (sta->flags & WLAN_STA_PREAUTH)
621		flags |= EAPOL_SM_PREAUTH;
622	if (sta->wpa_sm) {
623		flags |= EAPOL_SM_USES_WPA;
624		if (wpa_auth_sta_get_pmksa(sta->wpa_sm))
625			flags |= EAPOL_SM_FROM_PMKSA_CACHE;
626	}
627	return eapol_auth_alloc(hapd->eapol_auth, sta->addr, flags,
628				sta->wps_ie, sta->p2p_ie, sta,
629				sta->identity, sta->radius_cui);
630}
631
632
633/**
634 * ieee802_1x_receive - Process the EAPOL frames from the Supplicant
635 * @hapd: hostapd BSS data
636 * @sa: Source address (sender of the EAPOL frame)
637 * @buf: EAPOL frame
638 * @len: Length of buf in octets
639 *
640 * This function is called for each incoming EAPOL frame from the interface
641 */
642void ieee802_1x_receive(struct hostapd_data *hapd, const u8 *sa, const u8 *buf,
643			size_t len)
644{
645	struct sta_info *sta;
646	struct ieee802_1x_hdr *hdr;
647	struct ieee802_1x_eapol_key *key;
648	u16 datalen;
649	struct rsn_pmksa_cache_entry *pmksa;
650	int key_mgmt;
651
652	if (!hapd->conf->ieee802_1x && !hapd->conf->wpa &&
653	    !hapd->conf->wps_state)
654		return;
655
656	wpa_printf(MSG_DEBUG, "IEEE 802.1X: %lu bytes from " MACSTR,
657		   (unsigned long) len, MAC2STR(sa));
658	sta = ap_get_sta(hapd, sa);
659	if (!sta || (!(sta->flags & (WLAN_STA_ASSOC | WLAN_STA_PREAUTH)) &&
660		     !(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_WIRED))) {
661		wpa_printf(MSG_DEBUG, "IEEE 802.1X data frame from not "
662			   "associated/Pre-authenticating STA");
663		return;
664	}
665
666	if (len < sizeof(*hdr)) {
667		printf("   too short IEEE 802.1X packet\n");
668		return;
669	}
670
671	hdr = (struct ieee802_1x_hdr *) buf;
672	datalen = be_to_host16(hdr->length);
673	wpa_printf(MSG_DEBUG, "   IEEE 802.1X: version=%d type=%d length=%d",
674		   hdr->version, hdr->type, datalen);
675
676	if (len - sizeof(*hdr) < datalen) {
677		printf("   frame too short for this IEEE 802.1X packet\n");
678		if (sta->eapol_sm)
679			sta->eapol_sm->dot1xAuthEapLengthErrorFramesRx++;
680		return;
681	}
682	if (len - sizeof(*hdr) > datalen) {
683		wpa_printf(MSG_DEBUG, "   ignoring %lu extra octets after "
684			   "IEEE 802.1X packet",
685			   (unsigned long) len - sizeof(*hdr) - datalen);
686	}
687
688	if (sta->eapol_sm) {
689		sta->eapol_sm->dot1xAuthLastEapolFrameVersion = hdr->version;
690		sta->eapol_sm->dot1xAuthEapolFramesRx++;
691	}
692
693	key = (struct ieee802_1x_eapol_key *) (hdr + 1);
694	if (datalen >= sizeof(struct ieee802_1x_eapol_key) &&
695	    hdr->type == IEEE802_1X_TYPE_EAPOL_KEY &&
696	    (key->type == EAPOL_KEY_TYPE_WPA ||
697	     key->type == EAPOL_KEY_TYPE_RSN)) {
698		wpa_receive(hapd->wpa_auth, sta->wpa_sm, (u8 *) hdr,
699			    sizeof(*hdr) + datalen);
700		return;
701	}
702
703	if (!hapd->conf->ieee802_1x &&
704	    !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) {
705		wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore EAPOL message - "
706			   "802.1X not enabled and WPS not used");
707		return;
708	}
709
710	key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm);
711	if (key_mgmt != -1 && wpa_key_mgmt_wpa_psk(key_mgmt)) {
712		wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore EAPOL message - "
713			   "STA is using PSK");
714		return;
715	}
716
717	if (!sta->eapol_sm) {
718		sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
719		if (!sta->eapol_sm)
720			return;
721
722#ifdef CONFIG_WPS
723		if (!hapd->conf->ieee802_1x) {
724			u32 wflags = sta->flags & (WLAN_STA_WPS |
725						   WLAN_STA_WPS2 |
726						   WLAN_STA_MAYBE_WPS);
727			if (wflags == WLAN_STA_MAYBE_WPS ||
728			    wflags == (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) {
729				/*
730				 * Delay EAPOL frame transmission until a
731				 * possible WPS STA initiates the handshake
732				 * with EAPOL-Start. Only allow the wait to be
733				 * skipped if the STA is known to support WPS
734				 * 2.0.
735				 */
736				wpa_printf(MSG_DEBUG, "WPS: Do not start "
737					   "EAPOL until EAPOL-Start is "
738					   "received");
739				sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
740			}
741		}
742#endif /* CONFIG_WPS */
743
744		sta->eapol_sm->eap_if->portEnabled = TRUE;
745	}
746
747	/* since we support version 1, we can ignore version field and proceed
748	 * as specified in version 1 standard [IEEE Std 802.1X-2001, 7.5.5] */
749	/* TODO: actually, we are not version 1 anymore.. However, Version 2
750	 * does not change frame contents, so should be ok to process frames
751	 * more or less identically. Some changes might be needed for
752	 * verification of fields. */
753
754	switch (hdr->type) {
755	case IEEE802_1X_TYPE_EAP_PACKET:
756		handle_eap(hapd, sta, (u8 *) (hdr + 1), datalen);
757		break;
758
759	case IEEE802_1X_TYPE_EAPOL_START:
760		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
761			       HOSTAPD_LEVEL_DEBUG, "received EAPOL-Start "
762			       "from STA");
763		sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
764		pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
765		if (pmksa) {
766			hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
767				       HOSTAPD_LEVEL_DEBUG, "cached PMKSA "
768				       "available - ignore it since "
769				       "STA sent EAPOL-Start");
770			wpa_auth_sta_clear_pmksa(sta->wpa_sm, pmksa);
771		}
772		sta->eapol_sm->eapolStart = TRUE;
773		sta->eapol_sm->dot1xAuthEapolStartFramesRx++;
774		eap_server_clear_identity(sta->eapol_sm->eap);
775		wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
776		break;
777
778	case IEEE802_1X_TYPE_EAPOL_LOGOFF:
779		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
780			       HOSTAPD_LEVEL_DEBUG, "received EAPOL-Logoff "
781			       "from STA");
782		sta->acct_terminate_cause =
783			RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
784		accounting_sta_stop(hapd, sta);
785		sta->eapol_sm->eapolLogoff = TRUE;
786		sta->eapol_sm->dot1xAuthEapolLogoffFramesRx++;
787		eap_server_clear_identity(sta->eapol_sm->eap);
788		break;
789
790	case IEEE802_1X_TYPE_EAPOL_KEY:
791		wpa_printf(MSG_DEBUG, "   EAPOL-Key");
792		if (!ap_sta_is_authorized(sta)) {
793			wpa_printf(MSG_DEBUG, "   Dropped key data from "
794				   "unauthorized Supplicant");
795			break;
796		}
797		break;
798
799	case IEEE802_1X_TYPE_EAPOL_ENCAPSULATED_ASF_ALERT:
800		wpa_printf(MSG_DEBUG, "   EAPOL-Encapsulated-ASF-Alert");
801		/* TODO: implement support for this; show data */
802		break;
803
804	default:
805		wpa_printf(MSG_DEBUG, "   unknown IEEE 802.1X packet type");
806		sta->eapol_sm->dot1xAuthInvalidEapolFramesRx++;
807		break;
808	}
809
810	eapol_auth_step(sta->eapol_sm);
811}
812
813
814/**
815 * ieee802_1x_new_station - Start IEEE 802.1X authentication
816 * @hapd: hostapd BSS data
817 * @sta: The station
818 *
819 * This function is called to start IEEE 802.1X authentication when a new
820 * station completes IEEE 802.11 association.
821 */
822void ieee802_1x_new_station(struct hostapd_data *hapd, struct sta_info *sta)
823{
824	struct rsn_pmksa_cache_entry *pmksa;
825	int reassoc = 1;
826	int force_1x = 0;
827	int key_mgmt;
828
829#ifdef CONFIG_WPS
830	if (hapd->conf->wps_state && hapd->conf->wpa &&
831	    (sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) {
832		/*
833		 * Need to enable IEEE 802.1X/EAPOL state machines for possible
834		 * WPS handshake even if IEEE 802.1X/EAPOL is not used for
835		 * authentication in this BSS.
836		 */
837		force_1x = 1;
838	}
839#endif /* CONFIG_WPS */
840
841	if (!force_1x && !hapd->conf->ieee802_1x) {
842		wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - "
843			   "802.1X not enabled or forced for WPS");
844		/*
845		 * Clear any possible EAPOL authenticator state to support
846		 * reassociation change from WPS to PSK.
847		 */
848		ieee802_1x_free_station(sta);
849		return;
850	}
851
852	key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm);
853	if (key_mgmt != -1 && wpa_key_mgmt_wpa_psk(key_mgmt)) {
854		wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - using PSK");
855		/*
856		 * Clear any possible EAPOL authenticator state to support
857		 * reassociation change from WPA-EAP to PSK.
858		 */
859		ieee802_1x_free_station(sta);
860		return;
861	}
862
863	if (sta->eapol_sm == NULL) {
864		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
865			       HOSTAPD_LEVEL_DEBUG, "start authentication");
866		sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
867		if (sta->eapol_sm == NULL) {
868			hostapd_logger(hapd, sta->addr,
869				       HOSTAPD_MODULE_IEEE8021X,
870				       HOSTAPD_LEVEL_INFO,
871				       "failed to allocate state machine");
872			return;
873		}
874		reassoc = 0;
875	}
876
877#ifdef CONFIG_WPS
878	sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
879	if (!hapd->conf->ieee802_1x && !(sta->flags & WLAN_STA_WPS2)) {
880		/*
881		 * Delay EAPOL frame transmission until a possible WPS STA
882		 * initiates the handshake with EAPOL-Start. Only allow the
883		 * wait to be skipped if the STA is known to support WPS 2.0.
884		 */
885		wpa_printf(MSG_DEBUG, "WPS: Do not start EAPOL until "
886			   "EAPOL-Start is received");
887		sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
888	}
889#endif /* CONFIG_WPS */
890
891	sta->eapol_sm->eap_if->portEnabled = TRUE;
892
893#ifdef CONFIG_IEEE80211R
894	if (sta->auth_alg == WLAN_AUTH_FT) {
895		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
896			       HOSTAPD_LEVEL_DEBUG,
897			       "PMK from FT - skip IEEE 802.1X/EAP");
898		/* Setup EAPOL state machines to already authenticated state
899		 * because of existing FT information from R0KH. */
900		sta->eapol_sm->keyRun = TRUE;
901		sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
902		sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
903		sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
904		sta->eapol_sm->authSuccess = TRUE;
905		sta->eapol_sm->authFail = FALSE;
906		if (sta->eapol_sm->eap)
907			eap_sm_notify_cached(sta->eapol_sm->eap);
908		/* TODO: get vlan_id from R0KH using RRB message */
909		return;
910	}
911#endif /* CONFIG_IEEE80211R */
912
913	pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
914	if (pmksa) {
915		int old_vlanid;
916
917		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
918			       HOSTAPD_LEVEL_DEBUG,
919			       "PMK from PMKSA cache - skip IEEE 802.1X/EAP");
920		/* Setup EAPOL state machines to already authenticated state
921		 * because of existing PMKSA information in the cache. */
922		sta->eapol_sm->keyRun = TRUE;
923		sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
924		sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
925		sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
926		sta->eapol_sm->authSuccess = TRUE;
927		sta->eapol_sm->authFail = FALSE;
928		if (sta->eapol_sm->eap)
929			eap_sm_notify_cached(sta->eapol_sm->eap);
930		old_vlanid = sta->vlan_id;
931		pmksa_cache_to_eapol_data(pmksa, sta->eapol_sm);
932		if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
933			sta->vlan_id = 0;
934		ap_sta_bind_vlan(hapd, sta, old_vlanid);
935	} else {
936		if (reassoc) {
937			/*
938			 * Force EAPOL state machines to start
939			 * re-authentication without having to wait for the
940			 * Supplicant to send EAPOL-Start.
941			 */
942			sta->eapol_sm->reAuthenticate = TRUE;
943		}
944		eapol_auth_step(sta->eapol_sm);
945	}
946}
947
948
949void ieee802_1x_free_station(struct sta_info *sta)
950{
951	struct eapol_state_machine *sm = sta->eapol_sm;
952
953	if (sm == NULL)
954		return;
955
956	sta->eapol_sm = NULL;
957
958#ifndef CONFIG_NO_RADIUS
959	radius_msg_free(sm->last_recv_radius);
960	radius_free_class(&sm->radius_class);
961	wpabuf_free(sm->radius_cui);
962#endif /* CONFIG_NO_RADIUS */
963
964	os_free(sm->identity);
965	eapol_auth_free(sm);
966}
967
968
969#ifndef CONFIG_NO_RADIUS
970static void ieee802_1x_decapsulate_radius(struct hostapd_data *hapd,
971					  struct sta_info *sta)
972{
973	struct wpabuf *eap;
974	const struct eap_hdr *hdr;
975	int eap_type = -1;
976	char buf[64];
977	struct radius_msg *msg;
978	struct eapol_state_machine *sm = sta->eapol_sm;
979
980	if (sm == NULL || sm->last_recv_radius == NULL) {
981		if (sm)
982			sm->eap_if->aaaEapNoReq = TRUE;
983		return;
984	}
985
986	msg = sm->last_recv_radius;
987
988	eap = radius_msg_get_eap(msg);
989	if (eap == NULL) {
990		/* RFC 3579, Chap. 2.6.3:
991		 * RADIUS server SHOULD NOT send Access-Reject/no EAP-Message
992		 * attribute */
993		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
994			       HOSTAPD_LEVEL_WARNING, "could not extract "
995			       "EAP-Message from RADIUS message");
996		sm->eap_if->aaaEapNoReq = TRUE;
997		return;
998	}
999
1000	if (wpabuf_len(eap) < sizeof(*hdr)) {
1001		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1002			       HOSTAPD_LEVEL_WARNING, "too short EAP packet "
1003			       "received from authentication server");
1004		wpabuf_free(eap);
1005		sm->eap_if->aaaEapNoReq = TRUE;
1006		return;
1007	}
1008
1009	if (wpabuf_len(eap) > sizeof(*hdr))
1010		eap_type = (wpabuf_head_u8(eap))[sizeof(*hdr)];
1011
1012	hdr = wpabuf_head(eap);
1013	switch (hdr->code) {
1014	case EAP_CODE_REQUEST:
1015		if (eap_type >= 0)
1016			sm->eap_type_authsrv = eap_type;
1017		os_snprintf(buf, sizeof(buf), "EAP-Request-%s (%d)",
1018			    eap_type >= 0 ? eap_server_get_name(0, eap_type) :
1019			    "??",
1020			    eap_type);
1021		break;
1022	case EAP_CODE_RESPONSE:
1023		os_snprintf(buf, sizeof(buf), "EAP Response-%s (%d)",
1024			    eap_type >= 0 ? eap_server_get_name(0, eap_type) :
1025			    "??",
1026			    eap_type);
1027		break;
1028	case EAP_CODE_SUCCESS:
1029		os_strlcpy(buf, "EAP Success", sizeof(buf));
1030		break;
1031	case EAP_CODE_FAILURE:
1032		os_strlcpy(buf, "EAP Failure", sizeof(buf));
1033		break;
1034	default:
1035		os_strlcpy(buf, "unknown EAP code", sizeof(buf));
1036		break;
1037	}
1038	buf[sizeof(buf) - 1] = '\0';
1039	hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1040		       HOSTAPD_LEVEL_DEBUG, "decapsulated EAP packet (code=%d "
1041		       "id=%d len=%d) from RADIUS server: %s",
1042		       hdr->code, hdr->identifier, be_to_host16(hdr->length),
1043		       buf);
1044	sm->eap_if->aaaEapReq = TRUE;
1045
1046	wpabuf_free(sm->eap_if->aaaEapReqData);
1047	sm->eap_if->aaaEapReqData = eap;
1048}
1049
1050
1051static void ieee802_1x_get_keys(struct hostapd_data *hapd,
1052				struct sta_info *sta, struct radius_msg *msg,
1053				struct radius_msg *req,
1054				const u8 *shared_secret,
1055				size_t shared_secret_len)
1056{
1057	struct radius_ms_mppe_keys *keys;
1058	struct eapol_state_machine *sm = sta->eapol_sm;
1059	if (sm == NULL)
1060		return;
1061
1062	keys = radius_msg_get_ms_keys(msg, req, shared_secret,
1063				      shared_secret_len);
1064
1065	if (keys && keys->send && keys->recv) {
1066		size_t len = keys->send_len + keys->recv_len;
1067		wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Send-Key",
1068				keys->send, keys->send_len);
1069		wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Recv-Key",
1070				keys->recv, keys->recv_len);
1071
1072		os_free(sm->eap_if->aaaEapKeyData);
1073		sm->eap_if->aaaEapKeyData = os_malloc(len);
1074		if (sm->eap_if->aaaEapKeyData) {
1075			os_memcpy(sm->eap_if->aaaEapKeyData, keys->recv,
1076				  keys->recv_len);
1077			os_memcpy(sm->eap_if->aaaEapKeyData + keys->recv_len,
1078				  keys->send, keys->send_len);
1079			sm->eap_if->aaaEapKeyDataLen = len;
1080			sm->eap_if->aaaEapKeyAvailable = TRUE;
1081		}
1082	}
1083
1084	if (keys) {
1085		os_free(keys->send);
1086		os_free(keys->recv);
1087		os_free(keys);
1088	}
1089}
1090
1091
1092static void ieee802_1x_store_radius_class(struct hostapd_data *hapd,
1093					  struct sta_info *sta,
1094					  struct radius_msg *msg)
1095{
1096	u8 *class;
1097	size_t class_len;
1098	struct eapol_state_machine *sm = sta->eapol_sm;
1099	int count, i;
1100	struct radius_attr_data *nclass;
1101	size_t nclass_count;
1102
1103	if (!hapd->conf->radius->acct_server || hapd->radius == NULL ||
1104	    sm == NULL)
1105		return;
1106
1107	radius_free_class(&sm->radius_class);
1108	count = radius_msg_count_attr(msg, RADIUS_ATTR_CLASS, 1);
1109	if (count <= 0)
1110		return;
1111
1112	nclass = os_calloc(count, sizeof(struct radius_attr_data));
1113	if (nclass == NULL)
1114		return;
1115
1116	nclass_count = 0;
1117
1118	class = NULL;
1119	for (i = 0; i < count; i++) {
1120		do {
1121			if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CLASS,
1122						    &class, &class_len,
1123						    class) < 0) {
1124				i = count;
1125				break;
1126			}
1127		} while (class_len < 1);
1128
1129		nclass[nclass_count].data = os_malloc(class_len);
1130		if (nclass[nclass_count].data == NULL)
1131			break;
1132
1133		os_memcpy(nclass[nclass_count].data, class, class_len);
1134		nclass[nclass_count].len = class_len;
1135		nclass_count++;
1136	}
1137
1138	sm->radius_class.attr = nclass;
1139	sm->radius_class.count = nclass_count;
1140	wpa_printf(MSG_DEBUG, "IEEE 802.1X: Stored %lu RADIUS Class "
1141		   "attributes for " MACSTR,
1142		   (unsigned long) sm->radius_class.count,
1143		   MAC2STR(sta->addr));
1144}
1145
1146
1147/* Update sta->identity based on User-Name attribute in Access-Accept */
1148static void ieee802_1x_update_sta_identity(struct hostapd_data *hapd,
1149					   struct sta_info *sta,
1150					   struct radius_msg *msg)
1151{
1152	u8 *buf, *identity;
1153	size_t len;
1154	struct eapol_state_machine *sm = sta->eapol_sm;
1155
1156	if (sm == NULL)
1157		return;
1158
1159	if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_USER_NAME, &buf, &len,
1160				    NULL) < 0)
1161		return;
1162
1163	identity = (u8 *) dup_binstr(buf, len);
1164	if (identity == NULL)
1165		return;
1166
1167	hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1168		       HOSTAPD_LEVEL_DEBUG, "old identity '%s' updated with "
1169		       "User-Name from Access-Accept '%s'",
1170		       sm->identity ? (char *) sm->identity : "N/A",
1171		       (char *) identity);
1172
1173	os_free(sm->identity);
1174	sm->identity = identity;
1175	sm->identity_len = len;
1176}
1177
1178
1179/* Update CUI based on Chargeable-User-Identity attribute in Access-Accept */
1180static void ieee802_1x_update_sta_cui(struct hostapd_data *hapd,
1181				      struct sta_info *sta,
1182				      struct radius_msg *msg)
1183{
1184	struct eapol_state_machine *sm = sta->eapol_sm;
1185	struct wpabuf *cui;
1186	u8 *buf;
1187	size_t len;
1188
1189	if (sm == NULL)
1190		return;
1191
1192	if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CHARGEABLE_USER_IDENTITY,
1193				    &buf, &len, NULL) < 0)
1194		return;
1195
1196	cui = wpabuf_alloc_copy(buf, len);
1197	if (cui == NULL)
1198		return;
1199
1200	wpabuf_free(sm->radius_cui);
1201	sm->radius_cui = cui;
1202}
1203
1204
1205struct sta_id_search {
1206	u8 identifier;
1207	struct eapol_state_machine *sm;
1208};
1209
1210
1211static int ieee802_1x_select_radius_identifier(struct hostapd_data *hapd,
1212					       struct sta_info *sta,
1213					       void *ctx)
1214{
1215	struct sta_id_search *id_search = ctx;
1216	struct eapol_state_machine *sm = sta->eapol_sm;
1217
1218	if (sm && sm->radius_identifier >= 0 &&
1219	    sm->radius_identifier == id_search->identifier) {
1220		id_search->sm = sm;
1221		return 1;
1222	}
1223	return 0;
1224}
1225
1226
1227static struct eapol_state_machine *
1228ieee802_1x_search_radius_identifier(struct hostapd_data *hapd, u8 identifier)
1229{
1230	struct sta_id_search id_search;
1231	id_search.identifier = identifier;
1232	id_search.sm = NULL;
1233	ap_for_each_sta(hapd, ieee802_1x_select_radius_identifier, &id_search);
1234	return id_search.sm;
1235}
1236
1237
1238/**
1239 * ieee802_1x_receive_auth - Process RADIUS frames from Authentication Server
1240 * @msg: RADIUS response message
1241 * @req: RADIUS request message
1242 * @shared_secret: RADIUS shared secret
1243 * @shared_secret_len: Length of shared_secret in octets
1244 * @data: Context data (struct hostapd_data *)
1245 * Returns: Processing status
1246 */
1247static RadiusRxResult
1248ieee802_1x_receive_auth(struct radius_msg *msg, struct radius_msg *req,
1249			const u8 *shared_secret, size_t shared_secret_len,
1250			void *data)
1251{
1252	struct hostapd_data *hapd = data;
1253	struct sta_info *sta;
1254	u32 session_timeout = 0, termination_action, acct_interim_interval;
1255	int session_timeout_set, old_vlanid = 0;
1256	struct eapol_state_machine *sm;
1257	int override_eapReq = 0;
1258	struct radius_hdr *hdr = radius_msg_get_hdr(msg);
1259
1260	sm = ieee802_1x_search_radius_identifier(hapd, hdr->identifier);
1261	if (sm == NULL) {
1262		wpa_printf(MSG_DEBUG, "IEEE 802.1X: Could not find matching "
1263			   "station for this RADIUS message");
1264		return RADIUS_RX_UNKNOWN;
1265	}
1266	sta = sm->sta;
1267
1268	/* RFC 2869, Ch. 5.13: valid Message-Authenticator attribute MUST be
1269	 * present when packet contains an EAP-Message attribute */
1270	if (hdr->code == RADIUS_CODE_ACCESS_REJECT &&
1271	    radius_msg_get_attr(msg, RADIUS_ATTR_MESSAGE_AUTHENTICATOR, NULL,
1272				0) < 0 &&
1273	    radius_msg_get_attr(msg, RADIUS_ATTR_EAP_MESSAGE, NULL, 0) < 0) {
1274		wpa_printf(MSG_DEBUG, "Allowing RADIUS Access-Reject without "
1275			   "Message-Authenticator since it does not include "
1276			   "EAP-Message");
1277	} else if (radius_msg_verify(msg, shared_secret, shared_secret_len,
1278				     req, 1)) {
1279		printf("Incoming RADIUS packet did not have correct "
1280		       "Message-Authenticator - dropped\n");
1281		return RADIUS_RX_INVALID_AUTHENTICATOR;
1282	}
1283
1284	if (hdr->code != RADIUS_CODE_ACCESS_ACCEPT &&
1285	    hdr->code != RADIUS_CODE_ACCESS_REJECT &&
1286	    hdr->code != RADIUS_CODE_ACCESS_CHALLENGE) {
1287		printf("Unknown RADIUS message code\n");
1288		return RADIUS_RX_UNKNOWN;
1289	}
1290
1291	sm->radius_identifier = -1;
1292	wpa_printf(MSG_DEBUG, "RADIUS packet matching with station " MACSTR,
1293		   MAC2STR(sta->addr));
1294
1295	radius_msg_free(sm->last_recv_radius);
1296	sm->last_recv_radius = msg;
1297
1298	session_timeout_set =
1299		!radius_msg_get_attr_int32(msg, RADIUS_ATTR_SESSION_TIMEOUT,
1300					   &session_timeout);
1301	if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_TERMINATION_ACTION,
1302				      &termination_action))
1303		termination_action = RADIUS_TERMINATION_ACTION_DEFAULT;
1304
1305	if (hapd->conf->acct_interim_interval == 0 &&
1306	    hdr->code == RADIUS_CODE_ACCESS_ACCEPT &&
1307	    radius_msg_get_attr_int32(msg, RADIUS_ATTR_ACCT_INTERIM_INTERVAL,
1308				      &acct_interim_interval) == 0) {
1309		if (acct_interim_interval < 60) {
1310			hostapd_logger(hapd, sta->addr,
1311				       HOSTAPD_MODULE_IEEE8021X,
1312				       HOSTAPD_LEVEL_INFO,
1313				       "ignored too small "
1314				       "Acct-Interim-Interval %d",
1315				       acct_interim_interval);
1316		} else
1317			sta->acct_interim_interval = acct_interim_interval;
1318	}
1319
1320
1321	switch (hdr->code) {
1322	case RADIUS_CODE_ACCESS_ACCEPT:
1323		if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
1324			sta->vlan_id = 0;
1325#ifndef CONFIG_NO_VLAN
1326		else {
1327			old_vlanid = sta->vlan_id;
1328			sta->vlan_id = radius_msg_get_vlanid(msg);
1329		}
1330		if (sta->vlan_id > 0 &&
1331		    hostapd_vlan_id_valid(hapd->conf->vlan, sta->vlan_id)) {
1332			hostapd_logger(hapd, sta->addr,
1333				       HOSTAPD_MODULE_RADIUS,
1334				       HOSTAPD_LEVEL_INFO,
1335				       "VLAN ID %d", sta->vlan_id);
1336		} else if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_REQUIRED) {
1337			sta->eapol_sm->authFail = TRUE;
1338			hostapd_logger(hapd, sta->addr,
1339				       HOSTAPD_MODULE_IEEE8021X,
1340				       HOSTAPD_LEVEL_INFO, "authentication "
1341				       "server did not include required VLAN "
1342				       "ID in Access-Accept");
1343			break;
1344		}
1345#endif /* CONFIG_NO_VLAN */
1346
1347		if (ap_sta_bind_vlan(hapd, sta, old_vlanid) < 0)
1348			break;
1349
1350		/* RFC 3580, Ch. 3.17 */
1351		if (session_timeout_set && termination_action ==
1352		    RADIUS_TERMINATION_ACTION_RADIUS_REQUEST) {
1353			sm->reAuthPeriod = session_timeout;
1354		} else if (session_timeout_set)
1355			ap_sta_session_timeout(hapd, sta, session_timeout);
1356
1357		sm->eap_if->aaaSuccess = TRUE;
1358		override_eapReq = 1;
1359		ieee802_1x_get_keys(hapd, sta, msg, req, shared_secret,
1360				    shared_secret_len);
1361		ieee802_1x_store_radius_class(hapd, sta, msg);
1362		ieee802_1x_update_sta_identity(hapd, sta, msg);
1363		ieee802_1x_update_sta_cui(hapd, sta, msg);
1364		if (sm->eap_if->eapKeyAvailable &&
1365		    wpa_auth_pmksa_add(sta->wpa_sm, sm->eapol_key_crypt,
1366				       session_timeout_set ?
1367				       (int) session_timeout : -1, sm) == 0) {
1368			hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
1369				       HOSTAPD_LEVEL_DEBUG,
1370				       "Added PMKSA cache entry");
1371		}
1372		break;
1373	case RADIUS_CODE_ACCESS_REJECT:
1374		sm->eap_if->aaaFail = TRUE;
1375		override_eapReq = 1;
1376		break;
1377	case RADIUS_CODE_ACCESS_CHALLENGE:
1378		sm->eap_if->aaaEapReq = TRUE;
1379		if (session_timeout_set) {
1380			/* RFC 2869, Ch. 2.3.2; RFC 3580, Ch. 3.17 */
1381			sm->eap_if->aaaMethodTimeout = session_timeout;
1382			hostapd_logger(hapd, sm->addr,
1383				       HOSTAPD_MODULE_IEEE8021X,
1384				       HOSTAPD_LEVEL_DEBUG,
1385				       "using EAP timeout of %d seconds (from "
1386				       "RADIUS)",
1387				       sm->eap_if->aaaMethodTimeout);
1388		} else {
1389			/*
1390			 * Use dynamic retransmission behavior per EAP
1391			 * specification.
1392			 */
1393			sm->eap_if->aaaMethodTimeout = 0;
1394		}
1395		break;
1396	}
1397
1398	ieee802_1x_decapsulate_radius(hapd, sta);
1399	if (override_eapReq)
1400		sm->eap_if->aaaEapReq = FALSE;
1401
1402	eapol_auth_step(sm);
1403
1404	return RADIUS_RX_QUEUED;
1405}
1406#endif /* CONFIG_NO_RADIUS */
1407
1408
1409void ieee802_1x_abort_auth(struct hostapd_data *hapd, struct sta_info *sta)
1410{
1411	struct eapol_state_machine *sm = sta->eapol_sm;
1412	if (sm == NULL)
1413		return;
1414
1415	hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1416		       HOSTAPD_LEVEL_DEBUG, "aborting authentication");
1417
1418#ifndef CONFIG_NO_RADIUS
1419	radius_msg_free(sm->last_recv_radius);
1420	sm->last_recv_radius = NULL;
1421#endif /* CONFIG_NO_RADIUS */
1422
1423	if (sm->eap_if->eapTimeout) {
1424		/*
1425		 * Disconnect the STA since it did not reply to the last EAP
1426		 * request and we cannot continue EAP processing (EAP-Failure
1427		 * could only be sent if the EAP peer actually replied).
1428		 */
1429		wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "EAP Timeout, STA " MACSTR,
1430			MAC2STR(sta->addr));
1431
1432		sm->eap_if->portEnabled = FALSE;
1433		ap_sta_disconnect(hapd, sta, sta->addr,
1434				  WLAN_REASON_PREV_AUTH_NOT_VALID);
1435	}
1436}
1437
1438
1439static int ieee802_1x_rekey_broadcast(struct hostapd_data *hapd)
1440{
1441	struct eapol_authenticator *eapol = hapd->eapol_auth;
1442
1443	if (hapd->conf->default_wep_key_len < 1)
1444		return 0;
1445
1446	os_free(eapol->default_wep_key);
1447	eapol->default_wep_key = os_malloc(hapd->conf->default_wep_key_len);
1448	if (eapol->default_wep_key == NULL ||
1449	    random_get_bytes(eapol->default_wep_key,
1450			     hapd->conf->default_wep_key_len)) {
1451		printf("Could not generate random WEP key.\n");
1452		os_free(eapol->default_wep_key);
1453		eapol->default_wep_key = NULL;
1454		return -1;
1455	}
1456
1457	wpa_hexdump_key(MSG_DEBUG, "IEEE 802.1X: New default WEP key",
1458			eapol->default_wep_key,
1459			hapd->conf->default_wep_key_len);
1460
1461	return 0;
1462}
1463
1464
1465static int ieee802_1x_sta_key_available(struct hostapd_data *hapd,
1466					struct sta_info *sta, void *ctx)
1467{
1468	if (sta->eapol_sm) {
1469		sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
1470		eapol_auth_step(sta->eapol_sm);
1471	}
1472	return 0;
1473}
1474
1475
1476static void ieee802_1x_rekey(void *eloop_ctx, void *timeout_ctx)
1477{
1478	struct hostapd_data *hapd = eloop_ctx;
1479	struct eapol_authenticator *eapol = hapd->eapol_auth;
1480
1481	if (eapol->default_wep_key_idx >= 3)
1482		eapol->default_wep_key_idx =
1483			hapd->conf->individual_wep_key_len > 0 ? 1 : 0;
1484	else
1485		eapol->default_wep_key_idx++;
1486
1487	wpa_printf(MSG_DEBUG, "IEEE 802.1X: New default WEP key index %d",
1488		   eapol->default_wep_key_idx);
1489
1490	if (ieee802_1x_rekey_broadcast(hapd)) {
1491		hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1492			       HOSTAPD_LEVEL_WARNING, "failed to generate a "
1493			       "new broadcast key");
1494		os_free(eapol->default_wep_key);
1495		eapol->default_wep_key = NULL;
1496		return;
1497	}
1498
1499	/* TODO: Could setup key for RX here, but change default TX keyid only
1500	 * after new broadcast key has been sent to all stations. */
1501	if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
1502				broadcast_ether_addr,
1503				eapol->default_wep_key_idx, 1, NULL, 0,
1504				eapol->default_wep_key,
1505				hapd->conf->default_wep_key_len)) {
1506		hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1507			       HOSTAPD_LEVEL_WARNING, "failed to configure a "
1508			       "new broadcast key");
1509		os_free(eapol->default_wep_key);
1510		eapol->default_wep_key = NULL;
1511		return;
1512	}
1513
1514	ap_for_each_sta(hapd, ieee802_1x_sta_key_available, NULL);
1515
1516	if (hapd->conf->wep_rekeying_period > 0) {
1517		eloop_register_timeout(hapd->conf->wep_rekeying_period, 0,
1518				       ieee802_1x_rekey, hapd, NULL);
1519	}
1520}
1521
1522
1523static void ieee802_1x_eapol_send(void *ctx, void *sta_ctx, u8 type,
1524				  const u8 *data, size_t datalen)
1525{
1526#ifdef CONFIG_WPS
1527	struct sta_info *sta = sta_ctx;
1528
1529	if ((sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) ==
1530	    WLAN_STA_MAYBE_WPS) {
1531		const u8 *identity;
1532		size_t identity_len;
1533		struct eapol_state_machine *sm = sta->eapol_sm;
1534
1535		identity = eap_get_identity(sm->eap, &identity_len);
1536		if (identity &&
1537		    ((identity_len == WSC_ID_ENROLLEE_LEN &&
1538		      os_memcmp(identity, WSC_ID_ENROLLEE,
1539				WSC_ID_ENROLLEE_LEN) == 0) ||
1540		     (identity_len == WSC_ID_REGISTRAR_LEN &&
1541		      os_memcmp(identity, WSC_ID_REGISTRAR,
1542				WSC_ID_REGISTRAR_LEN) == 0))) {
1543			wpa_printf(MSG_DEBUG, "WPS: WLAN_STA_MAYBE_WPS -> "
1544				   "WLAN_STA_WPS");
1545			sta->flags |= WLAN_STA_WPS;
1546		}
1547	}
1548#endif /* CONFIG_WPS */
1549
1550	ieee802_1x_send(ctx, sta_ctx, type, data, datalen);
1551}
1552
1553
1554static void ieee802_1x_aaa_send(void *ctx, void *sta_ctx,
1555				const u8 *data, size_t datalen)
1556{
1557#ifndef CONFIG_NO_RADIUS
1558	struct hostapd_data *hapd = ctx;
1559	struct sta_info *sta = sta_ctx;
1560
1561	ieee802_1x_encapsulate_radius(hapd, sta, data, datalen);
1562#endif /* CONFIG_NO_RADIUS */
1563}
1564
1565
1566static void _ieee802_1x_finished(void *ctx, void *sta_ctx, int success,
1567				 int preauth)
1568{
1569	struct hostapd_data *hapd = ctx;
1570	struct sta_info *sta = sta_ctx;
1571	if (preauth)
1572		rsn_preauth_finished(hapd, sta, success);
1573	else
1574		ieee802_1x_finished(hapd, sta, success);
1575}
1576
1577
1578static int ieee802_1x_get_eap_user(void *ctx, const u8 *identity,
1579				   size_t identity_len, int phase2,
1580				   struct eap_user *user)
1581{
1582	struct hostapd_data *hapd = ctx;
1583	const struct hostapd_eap_user *eap_user;
1584	int i;
1585
1586	eap_user = hostapd_get_eap_user(hapd, identity, identity_len, phase2);
1587	if (eap_user == NULL)
1588		return -1;
1589
1590	os_memset(user, 0, sizeof(*user));
1591	user->phase2 = phase2;
1592	for (i = 0; i < EAP_MAX_METHODS; i++) {
1593		user->methods[i].vendor = eap_user->methods[i].vendor;
1594		user->methods[i].method = eap_user->methods[i].method;
1595	}
1596
1597	if (eap_user->password) {
1598		user->password = os_malloc(eap_user->password_len);
1599		if (user->password == NULL)
1600			return -1;
1601		os_memcpy(user->password, eap_user->password,
1602			  eap_user->password_len);
1603		user->password_len = eap_user->password_len;
1604		user->password_hash = eap_user->password_hash;
1605	}
1606	user->force_version = eap_user->force_version;
1607	user->ttls_auth = eap_user->ttls_auth;
1608
1609	return 0;
1610}
1611
1612
1613static int ieee802_1x_sta_entry_alive(void *ctx, const u8 *addr)
1614{
1615	struct hostapd_data *hapd = ctx;
1616	struct sta_info *sta;
1617	sta = ap_get_sta(hapd, addr);
1618	if (sta == NULL || sta->eapol_sm == NULL)
1619		return 0;
1620	return 1;
1621}
1622
1623
1624static void ieee802_1x_logger(void *ctx, const u8 *addr,
1625			      eapol_logger_level level, const char *txt)
1626{
1627#ifndef CONFIG_NO_HOSTAPD_LOGGER
1628	struct hostapd_data *hapd = ctx;
1629	int hlevel;
1630
1631	switch (level) {
1632	case EAPOL_LOGGER_WARNING:
1633		hlevel = HOSTAPD_LEVEL_WARNING;
1634		break;
1635	case EAPOL_LOGGER_INFO:
1636		hlevel = HOSTAPD_LEVEL_INFO;
1637		break;
1638	case EAPOL_LOGGER_DEBUG:
1639	default:
1640		hlevel = HOSTAPD_LEVEL_DEBUG;
1641		break;
1642	}
1643
1644	hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE8021X, hlevel, "%s",
1645		       txt);
1646#endif /* CONFIG_NO_HOSTAPD_LOGGER */
1647}
1648
1649
1650static void ieee802_1x_set_port_authorized(void *ctx, void *sta_ctx,
1651					   int authorized)
1652{
1653	struct hostapd_data *hapd = ctx;
1654	struct sta_info *sta = sta_ctx;
1655	ieee802_1x_set_sta_authorized(hapd, sta, authorized);
1656}
1657
1658
1659static void _ieee802_1x_abort_auth(void *ctx, void *sta_ctx)
1660{
1661	struct hostapd_data *hapd = ctx;
1662	struct sta_info *sta = sta_ctx;
1663	ieee802_1x_abort_auth(hapd, sta);
1664}
1665
1666
1667static void _ieee802_1x_tx_key(void *ctx, void *sta_ctx)
1668{
1669	struct hostapd_data *hapd = ctx;
1670	struct sta_info *sta = sta_ctx;
1671	ieee802_1x_tx_key(hapd, sta);
1672}
1673
1674
1675static void ieee802_1x_eapol_event(void *ctx, void *sta_ctx,
1676				   enum eapol_event type)
1677{
1678	/* struct hostapd_data *hapd = ctx; */
1679	struct sta_info *sta = sta_ctx;
1680	switch (type) {
1681	case EAPOL_AUTH_SM_CHANGE:
1682		wpa_auth_sm_notify(sta->wpa_sm);
1683		break;
1684	case EAPOL_AUTH_REAUTHENTICATE:
1685		wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
1686		break;
1687	}
1688}
1689
1690
1691int ieee802_1x_init(struct hostapd_data *hapd)
1692{
1693	int i;
1694	struct eapol_auth_config conf;
1695	struct eapol_auth_cb cb;
1696
1697	os_memset(&conf, 0, sizeof(conf));
1698	conf.ctx = hapd;
1699	conf.eap_reauth_period = hapd->conf->eap_reauth_period;
1700	conf.wpa = hapd->conf->wpa;
1701	conf.individual_wep_key_len = hapd->conf->individual_wep_key_len;
1702	conf.eap_server = hapd->conf->eap_server;
1703	conf.ssl_ctx = hapd->ssl_ctx;
1704	conf.msg_ctx = hapd->msg_ctx;
1705	conf.eap_sim_db_priv = hapd->eap_sim_db_priv;
1706	conf.eap_req_id_text = hapd->conf->eap_req_id_text;
1707	conf.eap_req_id_text_len = hapd->conf->eap_req_id_text_len;
1708	conf.pac_opaque_encr_key = hapd->conf->pac_opaque_encr_key;
1709	conf.eap_fast_a_id = hapd->conf->eap_fast_a_id;
1710	conf.eap_fast_a_id_len = hapd->conf->eap_fast_a_id_len;
1711	conf.eap_fast_a_id_info = hapd->conf->eap_fast_a_id_info;
1712	conf.eap_fast_prov = hapd->conf->eap_fast_prov;
1713	conf.pac_key_lifetime = hapd->conf->pac_key_lifetime;
1714	conf.pac_key_refresh_time = hapd->conf->pac_key_refresh_time;
1715	conf.eap_sim_aka_result_ind = hapd->conf->eap_sim_aka_result_ind;
1716	conf.tnc = hapd->conf->tnc;
1717	conf.wps = hapd->wps;
1718	conf.fragment_size = hapd->conf->fragment_size;
1719	conf.pwd_group = hapd->conf->pwd_group;
1720	conf.pbc_in_m1 = hapd->conf->pbc_in_m1;
1721	if (hapd->conf->server_id) {
1722		conf.server_id = (const u8 *) hapd->conf->server_id;
1723		conf.server_id_len = os_strlen(hapd->conf->server_id);
1724	} else {
1725		conf.server_id = (const u8 *) "hostapd";
1726		conf.server_id_len = 7;
1727	}
1728
1729	os_memset(&cb, 0, sizeof(cb));
1730	cb.eapol_send = ieee802_1x_eapol_send;
1731	cb.aaa_send = ieee802_1x_aaa_send;
1732	cb.finished = _ieee802_1x_finished;
1733	cb.get_eap_user = ieee802_1x_get_eap_user;
1734	cb.sta_entry_alive = ieee802_1x_sta_entry_alive;
1735	cb.logger = ieee802_1x_logger;
1736	cb.set_port_authorized = ieee802_1x_set_port_authorized;
1737	cb.abort_auth = _ieee802_1x_abort_auth;
1738	cb.tx_key = _ieee802_1x_tx_key;
1739	cb.eapol_event = ieee802_1x_eapol_event;
1740
1741	hapd->eapol_auth = eapol_auth_init(&conf, &cb);
1742	if (hapd->eapol_auth == NULL)
1743		return -1;
1744
1745	if ((hapd->conf->ieee802_1x || hapd->conf->wpa) &&
1746	    hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 1))
1747		return -1;
1748
1749#ifndef CONFIG_NO_RADIUS
1750	if (radius_client_register(hapd->radius, RADIUS_AUTH,
1751				   ieee802_1x_receive_auth, hapd))
1752		return -1;
1753#endif /* CONFIG_NO_RADIUS */
1754
1755	if (hapd->conf->default_wep_key_len) {
1756		for (i = 0; i < 4; i++)
1757			hostapd_drv_set_key(hapd->conf->iface, hapd,
1758					    WPA_ALG_NONE, NULL, i, 0, NULL, 0,
1759					    NULL, 0);
1760
1761		ieee802_1x_rekey(hapd, NULL);
1762
1763		if (hapd->eapol_auth->default_wep_key == NULL)
1764			return -1;
1765	}
1766
1767	return 0;
1768}
1769
1770
1771void ieee802_1x_deinit(struct hostapd_data *hapd)
1772{
1773	eloop_cancel_timeout(ieee802_1x_rekey, hapd, NULL);
1774
1775	if (hapd->driver != NULL &&
1776	    (hapd->conf->ieee802_1x || hapd->conf->wpa))
1777		hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0);
1778
1779	eapol_auth_deinit(hapd->eapol_auth);
1780	hapd->eapol_auth = NULL;
1781}
1782
1783
1784int ieee802_1x_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
1785			 const u8 *buf, size_t len, int ack)
1786{
1787	struct ieee80211_hdr *hdr;
1788	u8 *pos;
1789	const unsigned char rfc1042_hdr[ETH_ALEN] =
1790		{ 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
1791
1792	if (sta == NULL)
1793		return -1;
1794	if (len < sizeof(*hdr) + sizeof(rfc1042_hdr) + 2)
1795		return 0;
1796
1797	hdr = (struct ieee80211_hdr *) buf;
1798	pos = (u8 *) (hdr + 1);
1799	if (os_memcmp(pos, rfc1042_hdr, sizeof(rfc1042_hdr)) != 0)
1800		return 0;
1801	pos += sizeof(rfc1042_hdr);
1802	if (WPA_GET_BE16(pos) != ETH_P_PAE)
1803		return 0;
1804	pos += 2;
1805
1806	return ieee802_1x_eapol_tx_status(hapd, sta, pos, buf + len - pos,
1807					  ack);
1808}
1809
1810
1811int ieee802_1x_eapol_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
1812			       const u8 *buf, int len, int ack)
1813{
1814	const struct ieee802_1x_hdr *xhdr =
1815		(const struct ieee802_1x_hdr *) buf;
1816	const u8 *pos = buf + sizeof(*xhdr);
1817	struct ieee802_1x_eapol_key *key;
1818
1819	if (len < (int) sizeof(*xhdr))
1820		return 0;
1821	wpa_printf(MSG_DEBUG, "IEEE 802.1X: " MACSTR " TX status - version=%d "
1822		   "type=%d length=%d - ack=%d",
1823		   MAC2STR(sta->addr), xhdr->version, xhdr->type,
1824		   be_to_host16(xhdr->length), ack);
1825
1826	if (xhdr->type != IEEE802_1X_TYPE_EAPOL_KEY)
1827		return 0;
1828
1829	if (pos + sizeof(struct wpa_eapol_key) <= buf + len) {
1830		const struct wpa_eapol_key *wpa;
1831		wpa = (const struct wpa_eapol_key *) pos;
1832		if (wpa->type == EAPOL_KEY_TYPE_RSN ||
1833		    wpa->type == EAPOL_KEY_TYPE_WPA)
1834			wpa_auth_eapol_key_tx_status(hapd->wpa_auth,
1835						     sta->wpa_sm, ack);
1836	}
1837
1838	/* EAPOL EAP-Packet packets are eventually re-sent by either Supplicant
1839	 * or Authenticator state machines, but EAPOL-Key packets are not
1840	 * retransmitted in case of failure. Try to re-send failed EAPOL-Key
1841	 * packets couple of times because otherwise STA keys become
1842	 * unsynchronized with AP. */
1843	if (!ack && pos + sizeof(*key) <= buf + len) {
1844		key = (struct ieee802_1x_eapol_key *) pos;
1845		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1846			       HOSTAPD_LEVEL_DEBUG, "did not Ack EAPOL-Key "
1847			       "frame (%scast index=%d)",
1848			       key->key_index & BIT(7) ? "uni" : "broad",
1849			       key->key_index & ~BIT(7));
1850		/* TODO: re-send EAPOL-Key couple of times (with short delay
1851		 * between them?). If all attempt fail, report error and
1852		 * deauthenticate STA so that it will get new keys when
1853		 * authenticating again (e.g., after returning in range).
1854		 * Separate limit/transmit state needed both for unicast and
1855		 * broadcast keys(?) */
1856	}
1857	/* TODO: could move unicast key configuration from ieee802_1x_tx_key()
1858	 * to here and change the key only if the EAPOL-Key packet was Acked.
1859	 */
1860
1861	return 1;
1862}
1863
1864
1865u8 * ieee802_1x_get_identity(struct eapol_state_machine *sm, size_t *len)
1866{
1867	if (sm == NULL || sm->identity == NULL)
1868		return NULL;
1869
1870	*len = sm->identity_len;
1871	return sm->identity;
1872}
1873
1874
1875u8 * ieee802_1x_get_radius_class(struct eapol_state_machine *sm, size_t *len,
1876				 int idx)
1877{
1878	if (sm == NULL || sm->radius_class.attr == NULL ||
1879	    idx >= (int) sm->radius_class.count)
1880		return NULL;
1881
1882	*len = sm->radius_class.attr[idx].len;
1883	return sm->radius_class.attr[idx].data;
1884}
1885
1886
1887struct wpabuf * ieee802_1x_get_radius_cui(struct eapol_state_machine *sm)
1888{
1889	if (sm == NULL)
1890		return NULL;
1891	return sm->radius_cui;
1892}
1893
1894
1895const u8 * ieee802_1x_get_key(struct eapol_state_machine *sm, size_t *len)
1896{
1897	*len = 0;
1898	if (sm == NULL)
1899		return NULL;
1900
1901	*len = sm->eap_if->eapKeyDataLen;
1902	return sm->eap_if->eapKeyData;
1903}
1904
1905
1906void ieee802_1x_notify_port_enabled(struct eapol_state_machine *sm,
1907				    int enabled)
1908{
1909	if (sm == NULL)
1910		return;
1911	sm->eap_if->portEnabled = enabled ? TRUE : FALSE;
1912	eapol_auth_step(sm);
1913}
1914
1915
1916void ieee802_1x_notify_port_valid(struct eapol_state_machine *sm,
1917				  int valid)
1918{
1919	if (sm == NULL)
1920		return;
1921	sm->portValid = valid ? TRUE : FALSE;
1922	eapol_auth_step(sm);
1923}
1924
1925
1926void ieee802_1x_notify_pre_auth(struct eapol_state_machine *sm, int pre_auth)
1927{
1928	if (sm == NULL)
1929		return;
1930	if (pre_auth)
1931		sm->flags |= EAPOL_SM_PREAUTH;
1932	else
1933		sm->flags &= ~EAPOL_SM_PREAUTH;
1934}
1935
1936
1937static const char * bool_txt(Boolean bool)
1938{
1939	return bool ? "TRUE" : "FALSE";
1940}
1941
1942
1943int ieee802_1x_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
1944{
1945	/* TODO */
1946	return 0;
1947}
1948
1949
1950int ieee802_1x_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
1951			   char *buf, size_t buflen)
1952{
1953	int len = 0, ret;
1954	struct eapol_state_machine *sm = sta->eapol_sm;
1955	struct os_time t;
1956
1957	if (sm == NULL)
1958		return 0;
1959
1960	ret = os_snprintf(buf + len, buflen - len,
1961			  "dot1xPaePortNumber=%d\n"
1962			  "dot1xPaePortProtocolVersion=%d\n"
1963			  "dot1xPaePortCapabilities=1\n"
1964			  "dot1xPaePortInitialize=%d\n"
1965			  "dot1xPaePortReauthenticate=FALSE\n",
1966			  sta->aid,
1967			  EAPOL_VERSION,
1968			  sm->initialize);
1969	if (ret < 0 || (size_t) ret >= buflen - len)
1970		return len;
1971	len += ret;
1972
1973	/* dot1xAuthConfigTable */
1974	ret = os_snprintf(buf + len, buflen - len,
1975			  "dot1xAuthPaeState=%d\n"
1976			  "dot1xAuthBackendAuthState=%d\n"
1977			  "dot1xAuthAdminControlledDirections=%d\n"
1978			  "dot1xAuthOperControlledDirections=%d\n"
1979			  "dot1xAuthAuthControlledPortStatus=%d\n"
1980			  "dot1xAuthAuthControlledPortControl=%d\n"
1981			  "dot1xAuthQuietPeriod=%u\n"
1982			  "dot1xAuthServerTimeout=%u\n"
1983			  "dot1xAuthReAuthPeriod=%u\n"
1984			  "dot1xAuthReAuthEnabled=%s\n"
1985			  "dot1xAuthKeyTxEnabled=%s\n",
1986			  sm->auth_pae_state + 1,
1987			  sm->be_auth_state + 1,
1988			  sm->adminControlledDirections,
1989			  sm->operControlledDirections,
1990			  sm->authPortStatus,
1991			  sm->portControl,
1992			  sm->quietPeriod,
1993			  sm->serverTimeout,
1994			  sm->reAuthPeriod,
1995			  bool_txt(sm->reAuthEnabled),
1996			  bool_txt(sm->keyTxEnabled));
1997	if (ret < 0 || (size_t) ret >= buflen - len)
1998		return len;
1999	len += ret;
2000
2001	/* dot1xAuthStatsTable */
2002	ret = os_snprintf(buf + len, buflen - len,
2003			  "dot1xAuthEapolFramesRx=%u\n"
2004			  "dot1xAuthEapolFramesTx=%u\n"
2005			  "dot1xAuthEapolStartFramesRx=%u\n"
2006			  "dot1xAuthEapolLogoffFramesRx=%u\n"
2007			  "dot1xAuthEapolRespIdFramesRx=%u\n"
2008			  "dot1xAuthEapolRespFramesRx=%u\n"
2009			  "dot1xAuthEapolReqIdFramesTx=%u\n"
2010			  "dot1xAuthEapolReqFramesTx=%u\n"
2011			  "dot1xAuthInvalidEapolFramesRx=%u\n"
2012			  "dot1xAuthEapLengthErrorFramesRx=%u\n"
2013			  "dot1xAuthLastEapolFrameVersion=%u\n"
2014			  "dot1xAuthLastEapolFrameSource=" MACSTR "\n",
2015			  sm->dot1xAuthEapolFramesRx,
2016			  sm->dot1xAuthEapolFramesTx,
2017			  sm->dot1xAuthEapolStartFramesRx,
2018			  sm->dot1xAuthEapolLogoffFramesRx,
2019			  sm->dot1xAuthEapolRespIdFramesRx,
2020			  sm->dot1xAuthEapolRespFramesRx,
2021			  sm->dot1xAuthEapolReqIdFramesTx,
2022			  sm->dot1xAuthEapolReqFramesTx,
2023			  sm->dot1xAuthInvalidEapolFramesRx,
2024			  sm->dot1xAuthEapLengthErrorFramesRx,
2025			  sm->dot1xAuthLastEapolFrameVersion,
2026			  MAC2STR(sm->addr));
2027	if (ret < 0 || (size_t) ret >= buflen - len)
2028		return len;
2029	len += ret;
2030
2031	/* dot1xAuthDiagTable */
2032	ret = os_snprintf(buf + len, buflen - len,
2033			  "dot1xAuthEntersConnecting=%u\n"
2034			  "dot1xAuthEapLogoffsWhileConnecting=%u\n"
2035			  "dot1xAuthEntersAuthenticating=%u\n"
2036			  "dot1xAuthAuthSuccessesWhileAuthenticating=%u\n"
2037			  "dot1xAuthAuthTimeoutsWhileAuthenticating=%u\n"
2038			  "dot1xAuthAuthFailWhileAuthenticating=%u\n"
2039			  "dot1xAuthAuthEapStartsWhileAuthenticating=%u\n"
2040			  "dot1xAuthAuthEapLogoffWhileAuthenticating=%u\n"
2041			  "dot1xAuthAuthReauthsWhileAuthenticated=%u\n"
2042			  "dot1xAuthAuthEapStartsWhileAuthenticated=%u\n"
2043			  "dot1xAuthAuthEapLogoffWhileAuthenticated=%u\n"
2044			  "dot1xAuthBackendResponses=%u\n"
2045			  "dot1xAuthBackendAccessChallenges=%u\n"
2046			  "dot1xAuthBackendOtherRequestsToSupplicant=%u\n"
2047			  "dot1xAuthBackendAuthSuccesses=%u\n"
2048			  "dot1xAuthBackendAuthFails=%u\n",
2049			  sm->authEntersConnecting,
2050			  sm->authEapLogoffsWhileConnecting,
2051			  sm->authEntersAuthenticating,
2052			  sm->authAuthSuccessesWhileAuthenticating,
2053			  sm->authAuthTimeoutsWhileAuthenticating,
2054			  sm->authAuthFailWhileAuthenticating,
2055			  sm->authAuthEapStartsWhileAuthenticating,
2056			  sm->authAuthEapLogoffWhileAuthenticating,
2057			  sm->authAuthReauthsWhileAuthenticated,
2058			  sm->authAuthEapStartsWhileAuthenticated,
2059			  sm->authAuthEapLogoffWhileAuthenticated,
2060			  sm->backendResponses,
2061			  sm->backendAccessChallenges,
2062			  sm->backendOtherRequestsToSupplicant,
2063			  sm->backendAuthSuccesses,
2064			  sm->backendAuthFails);
2065	if (ret < 0 || (size_t) ret >= buflen - len)
2066		return len;
2067	len += ret;
2068
2069	/* dot1xAuthSessionStatsTable */
2070	os_get_time(&t);
2071	ret = os_snprintf(buf + len, buflen - len,
2072			  /* TODO: dot1xAuthSessionOctetsRx */
2073			  /* TODO: dot1xAuthSessionOctetsTx */
2074			  /* TODO: dot1xAuthSessionFramesRx */
2075			  /* TODO: dot1xAuthSessionFramesTx */
2076			  "dot1xAuthSessionId=%08X-%08X\n"
2077			  "dot1xAuthSessionAuthenticMethod=%d\n"
2078			  "dot1xAuthSessionTime=%u\n"
2079			  "dot1xAuthSessionTerminateCause=999\n"
2080			  "dot1xAuthSessionUserName=%s\n",
2081			  sta->acct_session_id_hi, sta->acct_session_id_lo,
2082			  (wpa_key_mgmt_wpa_ieee8021x(
2083				   wpa_auth_sta_key_mgmt(sta->wpa_sm))) ?
2084			  1 : 2,
2085			  (unsigned int) (t.sec - sta->acct_session_start),
2086			  sm->identity);
2087	if (ret < 0 || (size_t) ret >= buflen - len)
2088		return len;
2089	len += ret;
2090
2091	return len;
2092}
2093
2094
2095static void ieee802_1x_finished(struct hostapd_data *hapd,
2096				struct sta_info *sta, int success)
2097{
2098	const u8 *key;
2099	size_t len;
2100	/* TODO: get PMKLifetime from WPA parameters */
2101	static const int dot11RSNAConfigPMKLifetime = 43200;
2102
2103	key = ieee802_1x_get_key(sta->eapol_sm, &len);
2104	if (success && key && len >= PMK_LEN &&
2105	    wpa_auth_pmksa_add(sta->wpa_sm, key, dot11RSNAConfigPMKLifetime,
2106			       sta->eapol_sm) == 0) {
2107		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
2108			       HOSTAPD_LEVEL_DEBUG,
2109			       "Added PMKSA cache entry (IEEE 802.1X)");
2110	}
2111
2112	if (!success) {
2113		/*
2114		 * Many devices require deauthentication after WPS provisioning
2115		 * and some may not be be able to do that themselves, so
2116		 * disconnect the client here. In addition, this may also
2117		 * benefit IEEE 802.1X/EAPOL authentication cases, too since
2118		 * the EAPOL PAE state machine would remain in HELD state for
2119		 * considerable amount of time and some EAP methods, like
2120		 * EAP-FAST with anonymous provisioning, may require another
2121		 * EAPOL authentication to be started to complete connection.
2122		 */
2123		wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "IEEE 802.1X: Force "
2124			"disconnection after EAP-Failure");
2125		/* Add a small sleep to increase likelihood of previously
2126		 * requested EAP-Failure TX getting out before this should the
2127		 * driver reorder operations.
2128		 */
2129		os_sleep(0, 10000);
2130#ifndef ANDROID_P2P
2131		/* We need not do this for driver. For AP-SME flags if we send this disassoc,
2132		  * the p2p_client is gettig disassoc after it has completed the assoc
2133		  */
2134		ap_sta_disconnect(hapd, sta, sta->addr,
2135				  WLAN_REASON_IEEE_802_1X_AUTH_FAILED);
2136#endif
2137	}
2138}
2139