ieee802_1x.c revision 9657139ca0bbea9a84e0a3c7e9438d1f53c9ed24 
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		wpa_printf(MSG_DEBUG, "Could not set station " MACSTR
100			   " flags for kernel driver (errno=%d).",
101			   MAC2STR(sta->addr), errno);
102	}
103
104	if (authorized) {
105		os_get_time(&sta->connected_time);
106		accounting_sta_start(hapd, sta);
107	}
108}
109
110
111static void ieee802_1x_tx_key_one(struct hostapd_data *hapd,
112				  struct sta_info *sta,
113				  int idx, int broadcast,
114				  u8 *key_data, size_t key_len)
115{
116	u8 *buf, *ekey;
117	struct ieee802_1x_hdr *hdr;
118	struct ieee802_1x_eapol_key *key;
119	size_t len, ekey_len;
120	struct eapol_state_machine *sm = sta->eapol_sm;
121
122	if (sm == NULL)
123		return;
124
125	len = sizeof(*key) + key_len;
126	buf = os_zalloc(sizeof(*hdr) + len);
127	if (buf == NULL)
128		return;
129
130	hdr = (struct ieee802_1x_hdr *) buf;
131	key = (struct ieee802_1x_eapol_key *) (hdr + 1);
132	key->type = EAPOL_KEY_TYPE_RC4;
133	WPA_PUT_BE16(key->key_length, key_len);
134	wpa_get_ntp_timestamp(key->replay_counter);
135
136	if (random_get_bytes(key->key_iv, sizeof(key->key_iv))) {
137		wpa_printf(MSG_ERROR, "Could not get random numbers");
138		os_free(buf);
139		return;
140	}
141
142	key->key_index = idx | (broadcast ? 0 : BIT(7));
143	if (hapd->conf->eapol_key_index_workaround) {
144		/* According to some information, WinXP Supplicant seems to
145		 * interpret bit7 as an indication whether the key is to be
146		 * activated, so make it possible to enable workaround that
147		 * sets this bit for all keys. */
148		key->key_index |= BIT(7);
149	}
150
151	/* Key is encrypted using "Key-IV + MSK[0..31]" as the RC4-key and
152	 * MSK[32..63] is used to sign the message. */
153	if (sm->eap_if->eapKeyData == NULL || sm->eap_if->eapKeyDataLen < 64) {
154		wpa_printf(MSG_ERROR, "No eapKeyData available for encrypting "
155			   "and signing EAPOL-Key");
156		os_free(buf);
157		return;
158	}
159	os_memcpy((u8 *) (key + 1), key_data, key_len);
160	ekey_len = sizeof(key->key_iv) + 32;
161	ekey = os_malloc(ekey_len);
162	if (ekey == NULL) {
163		wpa_printf(MSG_ERROR, "Could not encrypt key");
164		os_free(buf);
165		return;
166	}
167	os_memcpy(ekey, key->key_iv, sizeof(key->key_iv));
168	os_memcpy(ekey + sizeof(key->key_iv), sm->eap_if->eapKeyData, 32);
169	rc4_skip(ekey, ekey_len, 0, (u8 *) (key + 1), key_len);
170	os_free(ekey);
171
172	/* This header is needed here for HMAC-MD5, but it will be regenerated
173	 * in ieee802_1x_send() */
174	hdr->version = hapd->conf->eapol_version;
175	hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
176	hdr->length = host_to_be16(len);
177	hmac_md5(sm->eap_if->eapKeyData + 32, 32, buf, sizeof(*hdr) + len,
178		 key->key_signature);
179
180	wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key to " MACSTR
181		   " (%s index=%d)", MAC2STR(sm->addr),
182		   broadcast ? "broadcast" : "unicast", idx);
183	ieee802_1x_send(hapd, sta, IEEE802_1X_TYPE_EAPOL_KEY, (u8 *) key, len);
184	if (sta->eapol_sm)
185		sta->eapol_sm->dot1xAuthEapolFramesTx++;
186	os_free(buf);
187}
188
189
190void ieee802_1x_tx_key(struct hostapd_data *hapd, struct sta_info *sta)
191{
192	struct eapol_authenticator *eapol = hapd->eapol_auth;
193	struct eapol_state_machine *sm = sta->eapol_sm;
194
195	if (sm == NULL || !sm->eap_if->eapKeyData)
196		return;
197
198	wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key(s) to " MACSTR,
199		   MAC2STR(sta->addr));
200
201#ifndef CONFIG_NO_VLAN
202	if (sta->vlan_id > 0 && sta->vlan_id <= MAX_VLAN_ID) {
203		wpa_printf(MSG_ERROR, "Using WEP with vlans is not supported.");
204		return;
205	}
206#endif /* CONFIG_NO_VLAN */
207
208	if (eapol->default_wep_key) {
209		ieee802_1x_tx_key_one(hapd, sta, eapol->default_wep_key_idx, 1,
210				      eapol->default_wep_key,
211				      hapd->conf->default_wep_key_len);
212	}
213
214	if (hapd->conf->individual_wep_key_len > 0) {
215		u8 *ikey;
216		ikey = os_malloc(hapd->conf->individual_wep_key_len);
217		if (ikey == NULL ||
218		    random_get_bytes(ikey, hapd->conf->individual_wep_key_len))
219		{
220			wpa_printf(MSG_ERROR, "Could not generate random "
221				   "individual WEP key.");
222			os_free(ikey);
223			return;
224		}
225
226		wpa_hexdump_key(MSG_DEBUG, "Individual WEP key",
227				ikey, hapd->conf->individual_wep_key_len);
228
229		ieee802_1x_tx_key_one(hapd, sta, 0, 0, ikey,
230				      hapd->conf->individual_wep_key_len);
231
232		/* TODO: set encryption in TX callback, i.e., only after STA
233		 * has ACKed EAPOL-Key frame */
234		if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
235					sta->addr, 0, 1, NULL, 0, ikey,
236					hapd->conf->individual_wep_key_len)) {
237			wpa_printf(MSG_ERROR, "Could not set individual WEP "
238				   "encryption.");
239		}
240
241		os_free(ikey);
242	}
243}
244
245
246const char *radius_mode_txt(struct hostapd_data *hapd)
247{
248	switch (hapd->iface->conf->hw_mode) {
249	case HOSTAPD_MODE_IEEE80211AD:
250		return "802.11ad";
251	case HOSTAPD_MODE_IEEE80211A:
252		return "802.11a";
253	case HOSTAPD_MODE_IEEE80211G:
254		return "802.11g";
255	case HOSTAPD_MODE_IEEE80211B:
256	default:
257		return "802.11b";
258	}
259}
260
261
262int radius_sta_rate(struct hostapd_data *hapd, struct sta_info *sta)
263{
264	int i;
265	u8 rate = 0;
266
267	for (i = 0; i < sta->supported_rates_len; i++)
268		if ((sta->supported_rates[i] & 0x7f) > rate)
269			rate = sta->supported_rates[i] & 0x7f;
270
271	return rate;
272}
273
274
275#ifndef CONFIG_NO_RADIUS
276static void ieee802_1x_learn_identity(struct hostapd_data *hapd,
277				      struct eapol_state_machine *sm,
278				      const u8 *eap, size_t len)
279{
280	const u8 *identity;
281	size_t identity_len;
282
283	if (len <= sizeof(struct eap_hdr) ||
284	    eap[sizeof(struct eap_hdr)] != EAP_TYPE_IDENTITY)
285		return;
286
287	identity = eap_get_identity(sm->eap, &identity_len);
288	if (identity == NULL)
289		return;
290
291	/* Save station identity for future RADIUS packets */
292	os_free(sm->identity);
293	sm->identity = (u8 *) dup_binstr(identity, identity_len);
294	if (sm->identity == NULL) {
295		sm->identity_len = 0;
296		return;
297	}
298
299	sm->identity_len = identity_len;
300	hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
301		       HOSTAPD_LEVEL_DEBUG, "STA identity '%s'", sm->identity);
302	sm->dot1xAuthEapolRespIdFramesRx++;
303}
304
305
306static int add_common_radius_sta_attr(struct hostapd_data *hapd,
307				      struct hostapd_radius_attr *req_attr,
308				      struct sta_info *sta,
309				      struct radius_msg *msg)
310{
311	char buf[128];
312
313	if (!hostapd_config_get_radius_attr(req_attr,
314					    RADIUS_ATTR_NAS_PORT) &&
315	    !radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT, sta->aid)) {
316		wpa_printf(MSG_ERROR, "Could not add NAS-Port");
317		return -1;
318	}
319
320	os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
321		    MAC2STR(sta->addr));
322	buf[sizeof(buf) - 1] = '\0';
323	if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID,
324				 (u8 *) buf, os_strlen(buf))) {
325		wpa_printf(MSG_ERROR, "Could not add Calling-Station-Id");
326		return -1;
327	}
328
329	if (sta->flags & WLAN_STA_PREAUTH) {
330		os_strlcpy(buf, "IEEE 802.11i Pre-Authentication",
331			   sizeof(buf));
332	} else {
333		os_snprintf(buf, sizeof(buf), "CONNECT %d%sMbps %s",
334			    radius_sta_rate(hapd, sta) / 2,
335			    (radius_sta_rate(hapd, sta) & 1) ? ".5" : "",
336			    radius_mode_txt(hapd));
337		buf[sizeof(buf) - 1] = '\0';
338	}
339	if (!hostapd_config_get_radius_attr(req_attr,
340					    RADIUS_ATTR_CONNECT_INFO) &&
341	    !radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO,
342				 (u8 *) buf, os_strlen(buf))) {
343		wpa_printf(MSG_ERROR, "Could not add Connect-Info");
344		return -1;
345	}
346
347	if (sta->acct_session_id_hi || sta->acct_session_id_lo) {
348		os_snprintf(buf, sizeof(buf), "%08X-%08X",
349			    sta->acct_session_id_hi, sta->acct_session_id_lo);
350		if (!radius_msg_add_attr(msg, RADIUS_ATTR_ACCT_SESSION_ID,
351					 (u8 *) buf, os_strlen(buf))) {
352			wpa_printf(MSG_ERROR, "Could not add Acct-Session-Id");
353			return -1;
354		}
355	}
356
357	return 0;
358}
359
360
361int add_common_radius_attr(struct hostapd_data *hapd,
362			   struct hostapd_radius_attr *req_attr,
363			   struct sta_info *sta,
364			   struct radius_msg *msg)
365{
366	char buf[128];
367	struct hostapd_radius_attr *attr;
368
369	if (!hostapd_config_get_radius_attr(req_attr,
370					    RADIUS_ATTR_NAS_IP_ADDRESS) &&
371	    hapd->conf->own_ip_addr.af == AF_INET &&
372	    !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS,
373				 (u8 *) &hapd->conf->own_ip_addr.u.v4, 4)) {
374		wpa_printf(MSG_ERROR, "Could not add NAS-IP-Address");
375		return -1;
376	}
377
378#ifdef CONFIG_IPV6
379	if (!hostapd_config_get_radius_attr(req_attr,
380					    RADIUS_ATTR_NAS_IPV6_ADDRESS) &&
381	    hapd->conf->own_ip_addr.af == AF_INET6 &&
382	    !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IPV6_ADDRESS,
383				 (u8 *) &hapd->conf->own_ip_addr.u.v6, 16)) {
384		wpa_printf(MSG_ERROR, "Could not add NAS-IPv6-Address");
385		return -1;
386	}
387#endif /* CONFIG_IPV6 */
388
389	if (!hostapd_config_get_radius_attr(req_attr,
390					    RADIUS_ATTR_NAS_IDENTIFIER) &&
391	    hapd->conf->nas_identifier &&
392	    !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IDENTIFIER,
393				 (u8 *) hapd->conf->nas_identifier,
394				 os_strlen(hapd->conf->nas_identifier))) {
395		wpa_printf(MSG_ERROR, "Could not add NAS-Identifier");
396		return -1;
397	}
398
399	os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT ":%s",
400		    MAC2STR(hapd->own_addr),
401		    wpa_ssid_txt(hapd->conf->ssid.ssid,
402				 hapd->conf->ssid.ssid_len));
403	buf[sizeof(buf) - 1] = '\0';
404	if (!hostapd_config_get_radius_attr(req_attr,
405					    RADIUS_ATTR_CALLED_STATION_ID) &&
406	    !radius_msg_add_attr(msg, RADIUS_ATTR_CALLED_STATION_ID,
407				 (u8 *) buf, os_strlen(buf))) {
408		wpa_printf(MSG_ERROR, "Could not add Called-Station-Id");
409		return -1;
410	}
411
412	if (!hostapd_config_get_radius_attr(req_attr,
413					    RADIUS_ATTR_NAS_PORT_TYPE) &&
414	    !radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT_TYPE,
415				       RADIUS_NAS_PORT_TYPE_IEEE_802_11)) {
416		wpa_printf(MSG_ERROR, "Could not add NAS-Port-Type");
417		return -1;
418	}
419
420	if (sta && add_common_radius_sta_attr(hapd, req_attr, sta, msg) < 0)
421		return -1;
422
423	for (attr = req_attr; attr; attr = attr->next) {
424		if (!radius_msg_add_attr(msg, attr->type,
425					 wpabuf_head(attr->val),
426					 wpabuf_len(attr->val))) {
427			wpa_printf(MSG_ERROR, "Could not add RADIUS "
428				   "attribute");
429			return -1;
430		}
431	}
432
433	return 0;
434}
435
436
437static void ieee802_1x_encapsulate_radius(struct hostapd_data *hapd,
438					  struct sta_info *sta,
439					  const u8 *eap, size_t len)
440{
441	struct radius_msg *msg;
442	struct eapol_state_machine *sm = sta->eapol_sm;
443
444	if (sm == NULL)
445		return;
446
447	ieee802_1x_learn_identity(hapd, sm, eap, len);
448
449	wpa_printf(MSG_DEBUG, "Encapsulating EAP message into a RADIUS "
450		   "packet");
451
452	sm->radius_identifier = radius_client_get_id(hapd->radius);
453	msg = radius_msg_new(RADIUS_CODE_ACCESS_REQUEST,
454			     sm->radius_identifier);
455	if (msg == NULL) {
456		printf("Could not create net RADIUS packet\n");
457		return;
458	}
459
460	radius_msg_make_authenticator(msg, (u8 *) sta, sizeof(*sta));
461
462	if (sm->identity &&
463	    !radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME,
464				 sm->identity, sm->identity_len)) {
465		printf("Could not add User-Name\n");
466		goto fail;
467	}
468
469	if (add_common_radius_attr(hapd, hapd->conf->radius_auth_req_attr, sta,
470				   msg) < 0)
471		goto fail;
472
473	/* TODO: should probably check MTU from driver config; 2304 is max for
474	 * IEEE 802.11, but use 1400 to avoid problems with too large packets
475	 */
476	if (!hostapd_config_get_radius_attr(hapd->conf->radius_auth_req_attr,
477					    RADIUS_ATTR_FRAMED_MTU) &&
478	    !radius_msg_add_attr_int32(msg, RADIUS_ATTR_FRAMED_MTU, 1400)) {
479		printf("Could not add Framed-MTU\n");
480		goto fail;
481	}
482
483	if (eap && !radius_msg_add_eap(msg, eap, len)) {
484		printf("Could not add EAP-Message\n");
485		goto fail;
486	}
487
488	/* State attribute must be copied if and only if this packet is
489	 * Access-Request reply to the previous Access-Challenge */
490	if (sm->last_recv_radius &&
491	    radius_msg_get_hdr(sm->last_recv_radius)->code ==
492	    RADIUS_CODE_ACCESS_CHALLENGE) {
493		int res = radius_msg_copy_attr(msg, sm->last_recv_radius,
494					       RADIUS_ATTR_STATE);
495		if (res < 0) {
496			printf("Could not copy State attribute from previous "
497			       "Access-Challenge\n");
498			goto fail;
499		}
500		if (res > 0) {
501			wpa_printf(MSG_DEBUG, "Copied RADIUS State Attribute");
502		}
503	}
504
505	if (hapd->conf->radius_request_cui) {
506		const u8 *cui;
507		size_t cui_len;
508		/* Add previously learned CUI or nul CUI to request CUI */
509		if (sm->radius_cui) {
510			cui = wpabuf_head(sm->radius_cui);
511			cui_len = wpabuf_len(sm->radius_cui);
512		} else {
513			cui = (const u8 *) "\0";
514			cui_len = 1;
515		}
516		if (!radius_msg_add_attr(msg,
517					 RADIUS_ATTR_CHARGEABLE_USER_IDENTITY,
518					 cui, cui_len)) {
519			wpa_printf(MSG_ERROR, "Could not add CUI");
520			goto fail;
521		}
522	}
523
524	if (radius_client_send(hapd->radius, msg, RADIUS_AUTH, sta->addr) < 0)
525		goto fail;
526
527	return;
528
529 fail:
530	radius_msg_free(msg);
531}
532#endif /* CONFIG_NO_RADIUS */
533
534
535static void handle_eap_response(struct hostapd_data *hapd,
536				struct sta_info *sta, struct eap_hdr *eap,
537				size_t len)
538{
539	u8 type, *data;
540	struct eapol_state_machine *sm = sta->eapol_sm;
541	if (sm == NULL)
542		return;
543
544	data = (u8 *) (eap + 1);
545
546	if (len < sizeof(*eap) + 1) {
547		printf("handle_eap_response: too short response data\n");
548		return;
549	}
550
551	sm->eap_type_supp = type = data[0];
552
553	hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
554		       HOSTAPD_LEVEL_DEBUG, "received EAP packet (code=%d "
555		       "id=%d len=%d) from STA: EAP Response-%s (%d)",
556		       eap->code, eap->identifier, be_to_host16(eap->length),
557		       eap_server_get_name(0, type), type);
558
559	sm->dot1xAuthEapolRespFramesRx++;
560
561	wpabuf_free(sm->eap_if->eapRespData);
562	sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len);
563	sm->eapolEap = TRUE;
564}
565
566
567/* Process incoming EAP packet from Supplicant */
568static void handle_eap(struct hostapd_data *hapd, struct sta_info *sta,
569		       u8 *buf, size_t len)
570{
571	struct eap_hdr *eap;
572	u16 eap_len;
573
574	if (len < sizeof(*eap)) {
575		printf("   too short EAP packet\n");
576		return;
577	}
578
579	eap = (struct eap_hdr *) buf;
580
581	eap_len = be_to_host16(eap->length);
582	wpa_printf(MSG_DEBUG, "EAP: code=%d identifier=%d length=%d",
583		   eap->code, eap->identifier, eap_len);
584	if (eap_len < sizeof(*eap)) {
585		wpa_printf(MSG_DEBUG, "   Invalid EAP length");
586		return;
587	} else if (eap_len > len) {
588		wpa_printf(MSG_DEBUG, "   Too short frame to contain this EAP "
589			   "packet");
590		return;
591	} else if (eap_len < len) {
592		wpa_printf(MSG_DEBUG, "   Ignoring %lu extra bytes after EAP "
593			   "packet", (unsigned long) len - eap_len);
594	}
595
596	switch (eap->code) {
597	case EAP_CODE_REQUEST:
598		wpa_printf(MSG_DEBUG, " (request)");
599		return;
600	case EAP_CODE_RESPONSE:
601		wpa_printf(MSG_DEBUG, " (response)");
602		handle_eap_response(hapd, sta, eap, eap_len);
603		break;
604	case EAP_CODE_SUCCESS:
605		wpa_printf(MSG_DEBUG, " (success)");
606		return;
607	case EAP_CODE_FAILURE:
608		wpa_printf(MSG_DEBUG, " (failure)");
609		return;
610	default:
611		wpa_printf(MSG_DEBUG, " (unknown code)");
612		return;
613	}
614}
615
616
617static struct eapol_state_machine *
618ieee802_1x_alloc_eapol_sm(struct hostapd_data *hapd, struct sta_info *sta)
619{
620	int flags = 0;
621	if (sta->flags & WLAN_STA_PREAUTH)
622		flags |= EAPOL_SM_PREAUTH;
623	if (sta->wpa_sm) {
624		flags |= EAPOL_SM_USES_WPA;
625		if (wpa_auth_sta_get_pmksa(sta->wpa_sm))
626			flags |= EAPOL_SM_FROM_PMKSA_CACHE;
627	}
628	return eapol_auth_alloc(hapd->eapol_auth, sta->addr, flags,
629				sta->wps_ie, sta->p2p_ie, sta,
630				sta->identity, sta->radius_cui);
631}
632
633
634/**
635 * ieee802_1x_receive - Process the EAPOL frames from the Supplicant
636 * @hapd: hostapd BSS data
637 * @sa: Source address (sender of the EAPOL frame)
638 * @buf: EAPOL frame
639 * @len: Length of buf in octets
640 *
641 * This function is called for each incoming EAPOL frame from the interface
642 */
643void ieee802_1x_receive(struct hostapd_data *hapd, const u8 *sa, const u8 *buf,
644			size_t len)
645{
646	struct sta_info *sta;
647	struct ieee802_1x_hdr *hdr;
648	struct ieee802_1x_eapol_key *key;
649	u16 datalen;
650	struct rsn_pmksa_cache_entry *pmksa;
651	int key_mgmt;
652
653	if (!hapd->conf->ieee802_1x && !hapd->conf->wpa &&
654	    !hapd->conf->wps_state)
655		return;
656
657	wpa_printf(MSG_DEBUG, "IEEE 802.1X: %lu bytes from " MACSTR,
658		   (unsigned long) len, MAC2STR(sa));
659	sta = ap_get_sta(hapd, sa);
660	if (!sta || (!(sta->flags & (WLAN_STA_ASSOC | WLAN_STA_PREAUTH)) &&
661		     !(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_WIRED))) {
662		wpa_printf(MSG_DEBUG, "IEEE 802.1X data frame from not "
663			   "associated/Pre-authenticating STA");
664		return;
665	}
666
667	if (len < sizeof(*hdr)) {
668		printf("   too short IEEE 802.1X packet\n");
669		return;
670	}
671
672	hdr = (struct ieee802_1x_hdr *) buf;
673	datalen = be_to_host16(hdr->length);
674	wpa_printf(MSG_DEBUG, "   IEEE 802.1X: version=%d type=%d length=%d",
675		   hdr->version, hdr->type, datalen);
676
677	if (len - sizeof(*hdr) < datalen) {
678		printf("   frame too short for this IEEE 802.1X packet\n");
679		if (sta->eapol_sm)
680			sta->eapol_sm->dot1xAuthEapLengthErrorFramesRx++;
681		return;
682	}
683	if (len - sizeof(*hdr) > datalen) {
684		wpa_printf(MSG_DEBUG, "   ignoring %lu extra octets after "
685			   "IEEE 802.1X packet",
686			   (unsigned long) len - sizeof(*hdr) - datalen);
687	}
688
689	if (sta->eapol_sm) {
690		sta->eapol_sm->dot1xAuthLastEapolFrameVersion = hdr->version;
691		sta->eapol_sm->dot1xAuthEapolFramesRx++;
692	}
693
694	key = (struct ieee802_1x_eapol_key *) (hdr + 1);
695	if (datalen >= sizeof(struct ieee802_1x_eapol_key) &&
696	    hdr->type == IEEE802_1X_TYPE_EAPOL_KEY &&
697	    (key->type == EAPOL_KEY_TYPE_WPA ||
698	     key->type == EAPOL_KEY_TYPE_RSN)) {
699		wpa_receive(hapd->wpa_auth, sta->wpa_sm, (u8 *) hdr,
700			    sizeof(*hdr) + datalen);
701		return;
702	}
703
704	if (!hapd->conf->ieee802_1x &&
705	    !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) {
706		wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore EAPOL message - "
707			   "802.1X not enabled and WPS not used");
708		return;
709	}
710
711	key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm);
712	if (key_mgmt != -1 && wpa_key_mgmt_wpa_psk(key_mgmt)) {
713		wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore EAPOL message - "
714			   "STA is using PSK");
715		return;
716	}
717
718	if (!sta->eapol_sm) {
719		sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
720		if (!sta->eapol_sm)
721			return;
722
723#ifdef CONFIG_WPS
724		if (!hapd->conf->ieee802_1x) {
725			u32 wflags = sta->flags & (WLAN_STA_WPS |
726						   WLAN_STA_WPS2 |
727						   WLAN_STA_MAYBE_WPS);
728			if (wflags == WLAN_STA_MAYBE_WPS ||
729			    wflags == (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) {
730				/*
731				 * Delay EAPOL frame transmission until a
732				 * possible WPS STA initiates the handshake
733				 * with EAPOL-Start. Only allow the wait to be
734				 * skipped if the STA is known to support WPS
735				 * 2.0.
736				 */
737				wpa_printf(MSG_DEBUG, "WPS: Do not start "
738					   "EAPOL until EAPOL-Start is "
739					   "received");
740				sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
741			}
742		}
743#endif /* CONFIG_WPS */
744
745		sta->eapol_sm->eap_if->portEnabled = TRUE;
746	}
747
748	/* since we support version 1, we can ignore version field and proceed
749	 * as specified in version 1 standard [IEEE Std 802.1X-2001, 7.5.5] */
750	/* TODO: actually, we are not version 1 anymore.. However, Version 2
751	 * does not change frame contents, so should be ok to process frames
752	 * more or less identically. Some changes might be needed for
753	 * verification of fields. */
754
755	switch (hdr->type) {
756	case IEEE802_1X_TYPE_EAP_PACKET:
757		handle_eap(hapd, sta, (u8 *) (hdr + 1), datalen);
758		break;
759
760	case IEEE802_1X_TYPE_EAPOL_START:
761		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
762			       HOSTAPD_LEVEL_DEBUG, "received EAPOL-Start "
763			       "from STA");
764		sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
765		pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
766		if (pmksa) {
767			hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
768				       HOSTAPD_LEVEL_DEBUG, "cached PMKSA "
769				       "available - ignore it since "
770				       "STA sent EAPOL-Start");
771			wpa_auth_sta_clear_pmksa(sta->wpa_sm, pmksa);
772		}
773		sta->eapol_sm->eapolStart = TRUE;
774		sta->eapol_sm->dot1xAuthEapolStartFramesRx++;
775		eap_server_clear_identity(sta->eapol_sm->eap);
776		wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
777		break;
778
779	case IEEE802_1X_TYPE_EAPOL_LOGOFF:
780		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
781			       HOSTAPD_LEVEL_DEBUG, "received EAPOL-Logoff "
782			       "from STA");
783		sta->acct_terminate_cause =
784			RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
785		accounting_sta_stop(hapd, sta);
786		sta->eapol_sm->eapolLogoff = TRUE;
787		sta->eapol_sm->dot1xAuthEapolLogoffFramesRx++;
788		eap_server_clear_identity(sta->eapol_sm->eap);
789		break;
790
791	case IEEE802_1X_TYPE_EAPOL_KEY:
792		wpa_printf(MSG_DEBUG, "   EAPOL-Key");
793		if (!ap_sta_is_authorized(sta)) {
794			wpa_printf(MSG_DEBUG, "   Dropped key data from "
795				   "unauthorized Supplicant");
796			break;
797		}
798		break;
799
800	case IEEE802_1X_TYPE_EAPOL_ENCAPSULATED_ASF_ALERT:
801		wpa_printf(MSG_DEBUG, "   EAPOL-Encapsulated-ASF-Alert");
802		/* TODO: implement support for this; show data */
803		break;
804
805	default:
806		wpa_printf(MSG_DEBUG, "   unknown IEEE 802.1X packet type");
807		sta->eapol_sm->dot1xAuthInvalidEapolFramesRx++;
808		break;
809	}
810
811	eapol_auth_step(sta->eapol_sm);
812}
813
814
815/**
816 * ieee802_1x_new_station - Start IEEE 802.1X authentication
817 * @hapd: hostapd BSS data
818 * @sta: The station
819 *
820 * This function is called to start IEEE 802.1X authentication when a new
821 * station completes IEEE 802.11 association.
822 */
823void ieee802_1x_new_station(struct hostapd_data *hapd, struct sta_info *sta)
824{
825	struct rsn_pmksa_cache_entry *pmksa;
826	int reassoc = 1;
827	int force_1x = 0;
828	int key_mgmt;
829
830#ifdef CONFIG_WPS
831	if (hapd->conf->wps_state && hapd->conf->wpa &&
832	    (sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) {
833		/*
834		 * Need to enable IEEE 802.1X/EAPOL state machines for possible
835		 * WPS handshake even if IEEE 802.1X/EAPOL is not used for
836		 * authentication in this BSS.
837		 */
838		force_1x = 1;
839	}
840#endif /* CONFIG_WPS */
841
842	if (!force_1x && !hapd->conf->ieee802_1x) {
843		wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - "
844			   "802.1X not enabled or forced for WPS");
845		/*
846		 * Clear any possible EAPOL authenticator state to support
847		 * reassociation change from WPS to PSK.
848		 */
849		ieee802_1x_free_station(sta);
850		return;
851	}
852
853	key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm);
854	if (key_mgmt != -1 && wpa_key_mgmt_wpa_psk(key_mgmt)) {
855		wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - using PSK");
856		/*
857		 * Clear any possible EAPOL authenticator state to support
858		 * reassociation change from WPA-EAP to PSK.
859		 */
860		ieee802_1x_free_station(sta);
861		return;
862	}
863
864	if (sta->eapol_sm == NULL) {
865		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
866			       HOSTAPD_LEVEL_DEBUG, "start authentication");
867		sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
868		if (sta->eapol_sm == NULL) {
869			hostapd_logger(hapd, sta->addr,
870				       HOSTAPD_MODULE_IEEE8021X,
871				       HOSTAPD_LEVEL_INFO,
872				       "failed to allocate state machine");
873			return;
874		}
875		reassoc = 0;
876	}
877
878#ifdef CONFIG_WPS
879	sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
880	if (!hapd->conf->ieee802_1x && !(sta->flags & WLAN_STA_WPS2)) {
881		/*
882		 * Delay EAPOL frame transmission until a possible WPS STA
883		 * initiates the handshake with EAPOL-Start. Only allow the
884		 * wait to be skipped if the STA is known to support WPS 2.0.
885		 */
886		wpa_printf(MSG_DEBUG, "WPS: Do not start EAPOL until "
887			   "EAPOL-Start is received");
888		sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
889	}
890#endif /* CONFIG_WPS */
891
892	sta->eapol_sm->eap_if->portEnabled = TRUE;
893
894#ifdef CONFIG_IEEE80211R
895	if (sta->auth_alg == WLAN_AUTH_FT) {
896		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
897			       HOSTAPD_LEVEL_DEBUG,
898			       "PMK from FT - skip IEEE 802.1X/EAP");
899		/* Setup EAPOL state machines to already authenticated state
900		 * because of existing FT information from R0KH. */
901		sta->eapol_sm->keyRun = TRUE;
902		sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
903		sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
904		sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
905		sta->eapol_sm->authSuccess = TRUE;
906		sta->eapol_sm->authFail = FALSE;
907		if (sta->eapol_sm->eap)
908			eap_sm_notify_cached(sta->eapol_sm->eap);
909		/* TODO: get vlan_id from R0KH using RRB message */
910		return;
911	}
912#endif /* CONFIG_IEEE80211R */
913
914	pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
915	if (pmksa) {
916		int old_vlanid;
917
918		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
919			       HOSTAPD_LEVEL_DEBUG,
920			       "PMK from PMKSA cache - skip IEEE 802.1X/EAP");
921		/* Setup EAPOL state machines to already authenticated state
922		 * because of existing PMKSA information in the cache. */
923		sta->eapol_sm->keyRun = TRUE;
924		sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
925		sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
926		sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
927		sta->eapol_sm->authSuccess = TRUE;
928		sta->eapol_sm->authFail = FALSE;
929		if (sta->eapol_sm->eap)
930			eap_sm_notify_cached(sta->eapol_sm->eap);
931		old_vlanid = sta->vlan_id;
932		pmksa_cache_to_eapol_data(pmksa, sta->eapol_sm);
933		if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
934			sta->vlan_id = 0;
935		ap_sta_bind_vlan(hapd, sta, old_vlanid);
936	} else {
937		if (reassoc) {
938			/*
939			 * Force EAPOL state machines to start
940			 * re-authentication without having to wait for the
941			 * Supplicant to send EAPOL-Start.
942			 */
943			sta->eapol_sm->reAuthenticate = TRUE;
944		}
945		eapol_auth_step(sta->eapol_sm);
946	}
947}
948
949
950void ieee802_1x_free_station(struct sta_info *sta)
951{
952	struct eapol_state_machine *sm = sta->eapol_sm;
953
954	if (sm == NULL)
955		return;
956
957	sta->eapol_sm = NULL;
958
959#ifndef CONFIG_NO_RADIUS
960	radius_msg_free(sm->last_recv_radius);
961	radius_free_class(&sm->radius_class);
962	wpabuf_free(sm->radius_cui);
963#endif /* CONFIG_NO_RADIUS */
964
965	os_free(sm->identity);
966	eapol_auth_free(sm);
967}
968
969
970#ifndef CONFIG_NO_RADIUS
971static void ieee802_1x_decapsulate_radius(struct hostapd_data *hapd,
972					  struct sta_info *sta)
973{
974	struct wpabuf *eap;
975	const struct eap_hdr *hdr;
976	int eap_type = -1;
977	char buf[64];
978	struct radius_msg *msg;
979	struct eapol_state_machine *sm = sta->eapol_sm;
980
981	if (sm == NULL || sm->last_recv_radius == NULL) {
982		if (sm)
983			sm->eap_if->aaaEapNoReq = TRUE;
984		return;
985	}
986
987	msg = sm->last_recv_radius;
988
989	eap = radius_msg_get_eap(msg);
990	if (eap == NULL) {
991		/* RFC 3579, Chap. 2.6.3:
992		 * RADIUS server SHOULD NOT send Access-Reject/no EAP-Message
993		 * attribute */
994		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
995			       HOSTAPD_LEVEL_WARNING, "could not extract "
996			       "EAP-Message from RADIUS message");
997		sm->eap_if->aaaEapNoReq = TRUE;
998		return;
999	}
1000
1001	if (wpabuf_len(eap) < sizeof(*hdr)) {
1002		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1003			       HOSTAPD_LEVEL_WARNING, "too short EAP packet "
1004			       "received from authentication server");
1005		wpabuf_free(eap);
1006		sm->eap_if->aaaEapNoReq = TRUE;
1007		return;
1008	}
1009
1010	if (wpabuf_len(eap) > sizeof(*hdr))
1011		eap_type = (wpabuf_head_u8(eap))[sizeof(*hdr)];
1012
1013	hdr = wpabuf_head(eap);
1014	switch (hdr->code) {
1015	case EAP_CODE_REQUEST:
1016		if (eap_type >= 0)
1017			sm->eap_type_authsrv = eap_type;
1018		os_snprintf(buf, sizeof(buf), "EAP-Request-%s (%d)",
1019			    eap_type >= 0 ? eap_server_get_name(0, eap_type) :
1020			    "??",
1021			    eap_type);
1022		break;
1023	case EAP_CODE_RESPONSE:
1024		os_snprintf(buf, sizeof(buf), "EAP Response-%s (%d)",
1025			    eap_type >= 0 ? eap_server_get_name(0, eap_type) :
1026			    "??",
1027			    eap_type);
1028		break;
1029	case EAP_CODE_SUCCESS:
1030		os_strlcpy(buf, "EAP Success", sizeof(buf));
1031		break;
1032	case EAP_CODE_FAILURE:
1033		os_strlcpy(buf, "EAP Failure", sizeof(buf));
1034		break;
1035	default:
1036		os_strlcpy(buf, "unknown EAP code", sizeof(buf));
1037		break;
1038	}
1039	buf[sizeof(buf) - 1] = '\0';
1040	hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1041		       HOSTAPD_LEVEL_DEBUG, "decapsulated EAP packet (code=%d "
1042		       "id=%d len=%d) from RADIUS server: %s",
1043		       hdr->code, hdr->identifier, be_to_host16(hdr->length),
1044		       buf);
1045	sm->eap_if->aaaEapReq = TRUE;
1046
1047	wpabuf_free(sm->eap_if->aaaEapReqData);
1048	sm->eap_if->aaaEapReqData = eap;
1049}
1050
1051
1052static void ieee802_1x_get_keys(struct hostapd_data *hapd,
1053				struct sta_info *sta, struct radius_msg *msg,
1054				struct radius_msg *req,
1055				const u8 *shared_secret,
1056				size_t shared_secret_len)
1057{
1058	struct radius_ms_mppe_keys *keys;
1059	struct eapol_state_machine *sm = sta->eapol_sm;
1060	if (sm == NULL)
1061		return;
1062
1063	keys = radius_msg_get_ms_keys(msg, req, shared_secret,
1064				      shared_secret_len);
1065
1066	if (keys && keys->send && keys->recv) {
1067		size_t len = keys->send_len + keys->recv_len;
1068		wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Send-Key",
1069				keys->send, keys->send_len);
1070		wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Recv-Key",
1071				keys->recv, keys->recv_len);
1072
1073		os_free(sm->eap_if->aaaEapKeyData);
1074		sm->eap_if->aaaEapKeyData = os_malloc(len);
1075		if (sm->eap_if->aaaEapKeyData) {
1076			os_memcpy(sm->eap_if->aaaEapKeyData, keys->recv,
1077				  keys->recv_len);
1078			os_memcpy(sm->eap_if->aaaEapKeyData + keys->recv_len,
1079				  keys->send, keys->send_len);
1080			sm->eap_if->aaaEapKeyDataLen = len;
1081			sm->eap_if->aaaEapKeyAvailable = TRUE;
1082		}
1083	}
1084
1085	if (keys) {
1086		os_free(keys->send);
1087		os_free(keys->recv);
1088		os_free(keys);
1089	}
1090}
1091
1092
1093static void ieee802_1x_store_radius_class(struct hostapd_data *hapd,
1094					  struct sta_info *sta,
1095					  struct radius_msg *msg)
1096{
1097	u8 *class;
1098	size_t class_len;
1099	struct eapol_state_machine *sm = sta->eapol_sm;
1100	int count, i;
1101	struct radius_attr_data *nclass;
1102	size_t nclass_count;
1103
1104	if (!hapd->conf->radius->acct_server || hapd->radius == NULL ||
1105	    sm == NULL)
1106		return;
1107
1108	radius_free_class(&sm->radius_class);
1109	count = radius_msg_count_attr(msg, RADIUS_ATTR_CLASS, 1);
1110	if (count <= 0)
1111		return;
1112
1113	nclass = os_calloc(count, sizeof(struct radius_attr_data));
1114	if (nclass == NULL)
1115		return;
1116
1117	nclass_count = 0;
1118
1119	class = NULL;
1120	for (i = 0; i < count; i++) {
1121		do {
1122			if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CLASS,
1123						    &class, &class_len,
1124						    class) < 0) {
1125				i = count;
1126				break;
1127			}
1128		} while (class_len < 1);
1129
1130		nclass[nclass_count].data = os_malloc(class_len);
1131		if (nclass[nclass_count].data == NULL)
1132			break;
1133
1134		os_memcpy(nclass[nclass_count].data, class, class_len);
1135		nclass[nclass_count].len = class_len;
1136		nclass_count++;
1137	}
1138
1139	sm->radius_class.attr = nclass;
1140	sm->radius_class.count = nclass_count;
1141	wpa_printf(MSG_DEBUG, "IEEE 802.1X: Stored %lu RADIUS Class "
1142		   "attributes for " MACSTR,
1143		   (unsigned long) sm->radius_class.count,
1144		   MAC2STR(sta->addr));
1145}
1146
1147
1148/* Update sta->identity based on User-Name attribute in Access-Accept */
1149static void ieee802_1x_update_sta_identity(struct hostapd_data *hapd,
1150					   struct sta_info *sta,
1151					   struct radius_msg *msg)
1152{
1153	u8 *buf, *identity;
1154	size_t len;
1155	struct eapol_state_machine *sm = sta->eapol_sm;
1156
1157	if (sm == NULL)
1158		return;
1159
1160	if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_USER_NAME, &buf, &len,
1161				    NULL) < 0)
1162		return;
1163
1164	identity = (u8 *) dup_binstr(buf, len);
1165	if (identity == NULL)
1166		return;
1167
1168	hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1169		       HOSTAPD_LEVEL_DEBUG, "old identity '%s' updated with "
1170		       "User-Name from Access-Accept '%s'",
1171		       sm->identity ? (char *) sm->identity : "N/A",
1172		       (char *) identity);
1173
1174	os_free(sm->identity);
1175	sm->identity = identity;
1176	sm->identity_len = len;
1177}
1178
1179
1180/* Update CUI based on Chargeable-User-Identity attribute in Access-Accept */
1181static void ieee802_1x_update_sta_cui(struct hostapd_data *hapd,
1182				      struct sta_info *sta,
1183				      struct radius_msg *msg)
1184{
1185	struct eapol_state_machine *sm = sta->eapol_sm;
1186	struct wpabuf *cui;
1187	u8 *buf;
1188	size_t len;
1189
1190	if (sm == NULL)
1191		return;
1192
1193	if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CHARGEABLE_USER_IDENTITY,
1194				    &buf, &len, NULL) < 0)
1195		return;
1196
1197	cui = wpabuf_alloc_copy(buf, len);
1198	if (cui == NULL)
1199		return;
1200
1201	wpabuf_free(sm->radius_cui);
1202	sm->radius_cui = cui;
1203}
1204
1205
1206struct sta_id_search {
1207	u8 identifier;
1208	struct eapol_state_machine *sm;
1209};
1210
1211
1212static int ieee802_1x_select_radius_identifier(struct hostapd_data *hapd,
1213					       struct sta_info *sta,
1214					       void *ctx)
1215{
1216	struct sta_id_search *id_search = ctx;
1217	struct eapol_state_machine *sm = sta->eapol_sm;
1218
1219	if (sm && sm->radius_identifier >= 0 &&
1220	    sm->radius_identifier == id_search->identifier) {
1221		id_search->sm = sm;
1222		return 1;
1223	}
1224	return 0;
1225}
1226
1227
1228static struct eapol_state_machine *
1229ieee802_1x_search_radius_identifier(struct hostapd_data *hapd, u8 identifier)
1230{
1231	struct sta_id_search id_search;
1232	id_search.identifier = identifier;
1233	id_search.sm = NULL;
1234	ap_for_each_sta(hapd, ieee802_1x_select_radius_identifier, &id_search);
1235	return id_search.sm;
1236}
1237
1238
1239/**
1240 * ieee802_1x_receive_auth - Process RADIUS frames from Authentication Server
1241 * @msg: RADIUS response message
1242 * @req: RADIUS request message
1243 * @shared_secret: RADIUS shared secret
1244 * @shared_secret_len: Length of shared_secret in octets
1245 * @data: Context data (struct hostapd_data *)
1246 * Returns: Processing status
1247 */
1248static RadiusRxResult
1249ieee802_1x_receive_auth(struct radius_msg *msg, struct radius_msg *req,
1250			const u8 *shared_secret, size_t shared_secret_len,
1251			void *data)
1252{
1253	struct hostapd_data *hapd = data;
1254	struct sta_info *sta;
1255	u32 session_timeout = 0, termination_action, acct_interim_interval;
1256	int session_timeout_set, old_vlanid = 0;
1257	struct eapol_state_machine *sm;
1258	int override_eapReq = 0;
1259	struct radius_hdr *hdr = radius_msg_get_hdr(msg);
1260
1261	sm = ieee802_1x_search_radius_identifier(hapd, hdr->identifier);
1262	if (sm == NULL) {
1263		wpa_printf(MSG_DEBUG, "IEEE 802.1X: Could not find matching "
1264			   "station for this RADIUS message");
1265		return RADIUS_RX_UNKNOWN;
1266	}
1267	sta = sm->sta;
1268
1269	/* RFC 2869, Ch. 5.13: valid Message-Authenticator attribute MUST be
1270	 * present when packet contains an EAP-Message attribute */
1271	if (hdr->code == RADIUS_CODE_ACCESS_REJECT &&
1272	    radius_msg_get_attr(msg, RADIUS_ATTR_MESSAGE_AUTHENTICATOR, NULL,
1273				0) < 0 &&
1274	    radius_msg_get_attr(msg, RADIUS_ATTR_EAP_MESSAGE, NULL, 0) < 0) {
1275		wpa_printf(MSG_DEBUG, "Allowing RADIUS Access-Reject without "
1276			   "Message-Authenticator since it does not include "
1277			   "EAP-Message");
1278	} else if (radius_msg_verify(msg, shared_secret, shared_secret_len,
1279				     req, 1)) {
1280		printf("Incoming RADIUS packet did not have correct "
1281		       "Message-Authenticator - dropped\n");
1282		return RADIUS_RX_INVALID_AUTHENTICATOR;
1283	}
1284
1285	if (hdr->code != RADIUS_CODE_ACCESS_ACCEPT &&
1286	    hdr->code != RADIUS_CODE_ACCESS_REJECT &&
1287	    hdr->code != RADIUS_CODE_ACCESS_CHALLENGE) {
1288		printf("Unknown RADIUS message code\n");
1289		return RADIUS_RX_UNKNOWN;
1290	}
1291
1292	sm->radius_identifier = -1;
1293	wpa_printf(MSG_DEBUG, "RADIUS packet matching with station " MACSTR,
1294		   MAC2STR(sta->addr));
1295
1296	radius_msg_free(sm->last_recv_radius);
1297	sm->last_recv_radius = msg;
1298
1299	session_timeout_set =
1300		!radius_msg_get_attr_int32(msg, RADIUS_ATTR_SESSION_TIMEOUT,
1301					   &session_timeout);
1302	if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_TERMINATION_ACTION,
1303				      &termination_action))
1304		termination_action = RADIUS_TERMINATION_ACTION_DEFAULT;
1305
1306	if (hapd->conf->acct_interim_interval == 0 &&
1307	    hdr->code == RADIUS_CODE_ACCESS_ACCEPT &&
1308	    radius_msg_get_attr_int32(msg, RADIUS_ATTR_ACCT_INTERIM_INTERVAL,
1309				      &acct_interim_interval) == 0) {
1310		if (acct_interim_interval < 60) {
1311			hostapd_logger(hapd, sta->addr,
1312				       HOSTAPD_MODULE_IEEE8021X,
1313				       HOSTAPD_LEVEL_INFO,
1314				       "ignored too small "
1315				       "Acct-Interim-Interval %d",
1316				       acct_interim_interval);
1317		} else
1318			sta->acct_interim_interval = acct_interim_interval;
1319	}
1320
1321
1322	switch (hdr->code) {
1323	case RADIUS_CODE_ACCESS_ACCEPT:
1324		if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
1325			sta->vlan_id = 0;
1326#ifndef CONFIG_NO_VLAN
1327		else {
1328			old_vlanid = sta->vlan_id;
1329			sta->vlan_id = radius_msg_get_vlanid(msg);
1330		}
1331		if (sta->vlan_id > 0 &&
1332		    hostapd_vlan_id_valid(hapd->conf->vlan, sta->vlan_id)) {
1333			hostapd_logger(hapd, sta->addr,
1334				       HOSTAPD_MODULE_RADIUS,
1335				       HOSTAPD_LEVEL_INFO,
1336				       "VLAN ID %d", sta->vlan_id);
1337		} else if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_REQUIRED) {
1338			sta->eapol_sm->authFail = TRUE;
1339			hostapd_logger(hapd, sta->addr,
1340				       HOSTAPD_MODULE_IEEE8021X,
1341				       HOSTAPD_LEVEL_INFO, "authentication "
1342				       "server did not include required VLAN "
1343				       "ID in Access-Accept");
1344			break;
1345		}
1346#endif /* CONFIG_NO_VLAN */
1347
1348		if (ap_sta_bind_vlan(hapd, sta, old_vlanid) < 0)
1349			break;
1350
1351		/* RFC 3580, Ch. 3.17 */
1352		if (session_timeout_set && termination_action ==
1353		    RADIUS_TERMINATION_ACTION_RADIUS_REQUEST) {
1354			sm->reAuthPeriod = session_timeout;
1355		} else if (session_timeout_set)
1356			ap_sta_session_timeout(hapd, sta, session_timeout);
1357
1358		sm->eap_if->aaaSuccess = TRUE;
1359		override_eapReq = 1;
1360		ieee802_1x_get_keys(hapd, sta, msg, req, shared_secret,
1361				    shared_secret_len);
1362		ieee802_1x_store_radius_class(hapd, sta, msg);
1363		ieee802_1x_update_sta_identity(hapd, sta, msg);
1364		ieee802_1x_update_sta_cui(hapd, sta, msg);
1365		if (sm->eap_if->eapKeyAvailable &&
1366		    wpa_auth_pmksa_add(sta->wpa_sm, sm->eapol_key_crypt,
1367				       session_timeout_set ?
1368				       (int) session_timeout : -1, sm) == 0) {
1369			hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
1370				       HOSTAPD_LEVEL_DEBUG,
1371				       "Added PMKSA cache entry");
1372		}
1373		break;
1374	case RADIUS_CODE_ACCESS_REJECT:
1375		sm->eap_if->aaaFail = TRUE;
1376		override_eapReq = 1;
1377		break;
1378	case RADIUS_CODE_ACCESS_CHALLENGE:
1379		sm->eap_if->aaaEapReq = TRUE;
1380		if (session_timeout_set) {
1381			/* RFC 2869, Ch. 2.3.2; RFC 3580, Ch. 3.17 */
1382			sm->eap_if->aaaMethodTimeout = session_timeout;
1383			hostapd_logger(hapd, sm->addr,
1384				       HOSTAPD_MODULE_IEEE8021X,
1385				       HOSTAPD_LEVEL_DEBUG,
1386				       "using EAP timeout of %d seconds (from "
1387				       "RADIUS)",
1388				       sm->eap_if->aaaMethodTimeout);
1389		} else {
1390			/*
1391			 * Use dynamic retransmission behavior per EAP
1392			 * specification.
1393			 */
1394			sm->eap_if->aaaMethodTimeout = 0;
1395		}
1396		break;
1397	}
1398
1399	ieee802_1x_decapsulate_radius(hapd, sta);
1400	if (override_eapReq)
1401		sm->eap_if->aaaEapReq = FALSE;
1402
1403	eapol_auth_step(sm);
1404
1405	return RADIUS_RX_QUEUED;
1406}
1407#endif /* CONFIG_NO_RADIUS */
1408
1409
1410void ieee802_1x_abort_auth(struct hostapd_data *hapd, struct sta_info *sta)
1411{
1412	struct eapol_state_machine *sm = sta->eapol_sm;
1413	if (sm == NULL)
1414		return;
1415
1416	hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1417		       HOSTAPD_LEVEL_DEBUG, "aborting authentication");
1418
1419#ifndef CONFIG_NO_RADIUS
1420	radius_msg_free(sm->last_recv_radius);
1421	sm->last_recv_radius = NULL;
1422#endif /* CONFIG_NO_RADIUS */
1423
1424	if (sm->eap_if->eapTimeout) {
1425		/*
1426		 * Disconnect the STA since it did not reply to the last EAP
1427		 * request and we cannot continue EAP processing (EAP-Failure
1428		 * could only be sent if the EAP peer actually replied).
1429		 */
1430		wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "EAP Timeout, STA " MACSTR,
1431			MAC2STR(sta->addr));
1432
1433		sm->eap_if->portEnabled = FALSE;
1434		ap_sta_disconnect(hapd, sta, sta->addr,
1435				  WLAN_REASON_PREV_AUTH_NOT_VALID);
1436	}
1437}
1438
1439
1440static int ieee802_1x_rekey_broadcast(struct hostapd_data *hapd)
1441{
1442	struct eapol_authenticator *eapol = hapd->eapol_auth;
1443
1444	if (hapd->conf->default_wep_key_len < 1)
1445		return 0;
1446
1447	os_free(eapol->default_wep_key);
1448	eapol->default_wep_key = os_malloc(hapd->conf->default_wep_key_len);
1449	if (eapol->default_wep_key == NULL ||
1450	    random_get_bytes(eapol->default_wep_key,
1451			     hapd->conf->default_wep_key_len)) {
1452		printf("Could not generate random WEP key.\n");
1453		os_free(eapol->default_wep_key);
1454		eapol->default_wep_key = NULL;
1455		return -1;
1456	}
1457
1458	wpa_hexdump_key(MSG_DEBUG, "IEEE 802.1X: New default WEP key",
1459			eapol->default_wep_key,
1460			hapd->conf->default_wep_key_len);
1461
1462	return 0;
1463}
1464
1465
1466static int ieee802_1x_sta_key_available(struct hostapd_data *hapd,
1467					struct sta_info *sta, void *ctx)
1468{
1469	if (sta->eapol_sm) {
1470		sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
1471		eapol_auth_step(sta->eapol_sm);
1472	}
1473	return 0;
1474}
1475
1476
1477static void ieee802_1x_rekey(void *eloop_ctx, void *timeout_ctx)
1478{
1479	struct hostapd_data *hapd = eloop_ctx;
1480	struct eapol_authenticator *eapol = hapd->eapol_auth;
1481
1482	if (eapol->default_wep_key_idx >= 3)
1483		eapol->default_wep_key_idx =
1484			hapd->conf->individual_wep_key_len > 0 ? 1 : 0;
1485	else
1486		eapol->default_wep_key_idx++;
1487
1488	wpa_printf(MSG_DEBUG, "IEEE 802.1X: New default WEP key index %d",
1489		   eapol->default_wep_key_idx);
1490
1491	if (ieee802_1x_rekey_broadcast(hapd)) {
1492		hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1493			       HOSTAPD_LEVEL_WARNING, "failed to generate a "
1494			       "new broadcast key");
1495		os_free(eapol->default_wep_key);
1496		eapol->default_wep_key = NULL;
1497		return;
1498	}
1499
1500	/* TODO: Could setup key for RX here, but change default TX keyid only
1501	 * after new broadcast key has been sent to all stations. */
1502	if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
1503				broadcast_ether_addr,
1504				eapol->default_wep_key_idx, 1, NULL, 0,
1505				eapol->default_wep_key,
1506				hapd->conf->default_wep_key_len)) {
1507		hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1508			       HOSTAPD_LEVEL_WARNING, "failed to configure a "
1509			       "new broadcast key");
1510		os_free(eapol->default_wep_key);
1511		eapol->default_wep_key = NULL;
1512		return;
1513	}
1514
1515	ap_for_each_sta(hapd, ieee802_1x_sta_key_available, NULL);
1516
1517	if (hapd->conf->wep_rekeying_period > 0) {
1518		eloop_register_timeout(hapd->conf->wep_rekeying_period, 0,
1519				       ieee802_1x_rekey, hapd, NULL);
1520	}
1521}
1522
1523
1524static void ieee802_1x_eapol_send(void *ctx, void *sta_ctx, u8 type,
1525				  const u8 *data, size_t datalen)
1526{
1527#ifdef CONFIG_WPS
1528	struct sta_info *sta = sta_ctx;
1529
1530	if ((sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) ==
1531	    WLAN_STA_MAYBE_WPS) {
1532		const u8 *identity;
1533		size_t identity_len;
1534		struct eapol_state_machine *sm = sta->eapol_sm;
1535
1536		identity = eap_get_identity(sm->eap, &identity_len);
1537		if (identity &&
1538		    ((identity_len == WSC_ID_ENROLLEE_LEN &&
1539		      os_memcmp(identity, WSC_ID_ENROLLEE,
1540				WSC_ID_ENROLLEE_LEN) == 0) ||
1541		     (identity_len == WSC_ID_REGISTRAR_LEN &&
1542		      os_memcmp(identity, WSC_ID_REGISTRAR,
1543				WSC_ID_REGISTRAR_LEN) == 0))) {
1544			wpa_printf(MSG_DEBUG, "WPS: WLAN_STA_MAYBE_WPS -> "
1545				   "WLAN_STA_WPS");
1546			sta->flags |= WLAN_STA_WPS;
1547		}
1548	}
1549#endif /* CONFIG_WPS */
1550
1551	ieee802_1x_send(ctx, sta_ctx, type, data, datalen);
1552}
1553
1554
1555static void ieee802_1x_aaa_send(void *ctx, void *sta_ctx,
1556				const u8 *data, size_t datalen)
1557{
1558#ifndef CONFIG_NO_RADIUS
1559	struct hostapd_data *hapd = ctx;
1560	struct sta_info *sta = sta_ctx;
1561
1562	ieee802_1x_encapsulate_radius(hapd, sta, data, datalen);
1563#endif /* CONFIG_NO_RADIUS */
1564}
1565
1566
1567static void _ieee802_1x_finished(void *ctx, void *sta_ctx, int success,
1568				 int preauth)
1569{
1570	struct hostapd_data *hapd = ctx;
1571	struct sta_info *sta = sta_ctx;
1572	if (preauth)
1573		rsn_preauth_finished(hapd, sta, success);
1574	else
1575		ieee802_1x_finished(hapd, sta, success);
1576}
1577
1578
1579static int ieee802_1x_get_eap_user(void *ctx, const u8 *identity,
1580				   size_t identity_len, int phase2,
1581				   struct eap_user *user)
1582{
1583	struct hostapd_data *hapd = ctx;
1584	const struct hostapd_eap_user *eap_user;
1585	int i;
1586
1587	eap_user = hostapd_get_eap_user(hapd, identity, identity_len, phase2);
1588	if (eap_user == NULL)
1589		return -1;
1590
1591	os_memset(user, 0, sizeof(*user));
1592	user->phase2 = phase2;
1593	for (i = 0; i < EAP_MAX_METHODS; i++) {
1594		user->methods[i].vendor = eap_user->methods[i].vendor;
1595		user->methods[i].method = eap_user->methods[i].method;
1596	}
1597
1598	if (eap_user->password) {
1599		user->password = os_malloc(eap_user->password_len);
1600		if (user->password == NULL)
1601			return -1;
1602		os_memcpy(user->password, eap_user->password,
1603			  eap_user->password_len);
1604		user->password_len = eap_user->password_len;
1605		user->password_hash = eap_user->password_hash;
1606	}
1607	user->force_version = eap_user->force_version;
1608	user->ttls_auth = eap_user->ttls_auth;
1609
1610	return 0;
1611}
1612
1613
1614static int ieee802_1x_sta_entry_alive(void *ctx, const u8 *addr)
1615{
1616	struct hostapd_data *hapd = ctx;
1617	struct sta_info *sta;
1618	sta = ap_get_sta(hapd, addr);
1619	if (sta == NULL || sta->eapol_sm == NULL)
1620		return 0;
1621	return 1;
1622}
1623
1624
1625static void ieee802_1x_logger(void *ctx, const u8 *addr,
1626			      eapol_logger_level level, const char *txt)
1627{
1628#ifndef CONFIG_NO_HOSTAPD_LOGGER
1629	struct hostapd_data *hapd = ctx;
1630	int hlevel;
1631
1632	switch (level) {
1633	case EAPOL_LOGGER_WARNING:
1634		hlevel = HOSTAPD_LEVEL_WARNING;
1635		break;
1636	case EAPOL_LOGGER_INFO:
1637		hlevel = HOSTAPD_LEVEL_INFO;
1638		break;
1639	case EAPOL_LOGGER_DEBUG:
1640	default:
1641		hlevel = HOSTAPD_LEVEL_DEBUG;
1642		break;
1643	}
1644
1645	hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE8021X, hlevel, "%s",
1646		       txt);
1647#endif /* CONFIG_NO_HOSTAPD_LOGGER */
1648}
1649
1650
1651static void ieee802_1x_set_port_authorized(void *ctx, void *sta_ctx,
1652					   int authorized)
1653{
1654	struct hostapd_data *hapd = ctx;
1655	struct sta_info *sta = sta_ctx;
1656	ieee802_1x_set_sta_authorized(hapd, sta, authorized);
1657}
1658
1659
1660static void _ieee802_1x_abort_auth(void *ctx, void *sta_ctx)
1661{
1662	struct hostapd_data *hapd = ctx;
1663	struct sta_info *sta = sta_ctx;
1664	ieee802_1x_abort_auth(hapd, sta);
1665}
1666
1667
1668static void _ieee802_1x_tx_key(void *ctx, void *sta_ctx)
1669{
1670	struct hostapd_data *hapd = ctx;
1671	struct sta_info *sta = sta_ctx;
1672	ieee802_1x_tx_key(hapd, sta);
1673}
1674
1675
1676static void ieee802_1x_eapol_event(void *ctx, void *sta_ctx,
1677				   enum eapol_event type)
1678{
1679	/* struct hostapd_data *hapd = ctx; */
1680	struct sta_info *sta = sta_ctx;
1681	switch (type) {
1682	case EAPOL_AUTH_SM_CHANGE:
1683		wpa_auth_sm_notify(sta->wpa_sm);
1684		break;
1685	case EAPOL_AUTH_REAUTHENTICATE:
1686		wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
1687		break;
1688	}
1689}
1690
1691
1692int ieee802_1x_init(struct hostapd_data *hapd)
1693{
1694	int i;
1695	struct eapol_auth_config conf;
1696	struct eapol_auth_cb cb;
1697
1698	os_memset(&conf, 0, sizeof(conf));
1699	conf.ctx = hapd;
1700	conf.eap_reauth_period = hapd->conf->eap_reauth_period;
1701	conf.wpa = hapd->conf->wpa;
1702	conf.individual_wep_key_len = hapd->conf->individual_wep_key_len;
1703	conf.eap_server = hapd->conf->eap_server;
1704	conf.ssl_ctx = hapd->ssl_ctx;
1705	conf.msg_ctx = hapd->msg_ctx;
1706	conf.eap_sim_db_priv = hapd->eap_sim_db_priv;
1707	conf.eap_req_id_text = hapd->conf->eap_req_id_text;
1708	conf.eap_req_id_text_len = hapd->conf->eap_req_id_text_len;
1709	conf.pac_opaque_encr_key = hapd->conf->pac_opaque_encr_key;
1710	conf.eap_fast_a_id = hapd->conf->eap_fast_a_id;
1711	conf.eap_fast_a_id_len = hapd->conf->eap_fast_a_id_len;
1712	conf.eap_fast_a_id_info = hapd->conf->eap_fast_a_id_info;
1713	conf.eap_fast_prov = hapd->conf->eap_fast_prov;
1714	conf.pac_key_lifetime = hapd->conf->pac_key_lifetime;
1715	conf.pac_key_refresh_time = hapd->conf->pac_key_refresh_time;
1716	conf.eap_sim_aka_result_ind = hapd->conf->eap_sim_aka_result_ind;
1717	conf.tnc = hapd->conf->tnc;
1718	conf.wps = hapd->wps;
1719	conf.fragment_size = hapd->conf->fragment_size;
1720	conf.pwd_group = hapd->conf->pwd_group;
1721	conf.pbc_in_m1 = hapd->conf->pbc_in_m1;
1722	if (hapd->conf->server_id) {
1723		conf.server_id = (const u8 *) hapd->conf->server_id;
1724		conf.server_id_len = os_strlen(hapd->conf->server_id);
1725	} else {
1726		conf.server_id = (const u8 *) "hostapd";
1727		conf.server_id_len = 7;
1728	}
1729
1730	os_memset(&cb, 0, sizeof(cb));
1731	cb.eapol_send = ieee802_1x_eapol_send;
1732	cb.aaa_send = ieee802_1x_aaa_send;
1733	cb.finished = _ieee802_1x_finished;
1734	cb.get_eap_user = ieee802_1x_get_eap_user;
1735	cb.sta_entry_alive = ieee802_1x_sta_entry_alive;
1736	cb.logger = ieee802_1x_logger;
1737	cb.set_port_authorized = ieee802_1x_set_port_authorized;
1738	cb.abort_auth = _ieee802_1x_abort_auth;
1739	cb.tx_key = _ieee802_1x_tx_key;
1740	cb.eapol_event = ieee802_1x_eapol_event;
1741
1742	hapd->eapol_auth = eapol_auth_init(&conf, &cb);
1743	if (hapd->eapol_auth == NULL)
1744		return -1;
1745
1746	if ((hapd->conf->ieee802_1x || hapd->conf->wpa) &&
1747	    hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 1))
1748		return -1;
1749
1750#ifndef CONFIG_NO_RADIUS
1751	if (radius_client_register(hapd->radius, RADIUS_AUTH,
1752				   ieee802_1x_receive_auth, hapd))
1753		return -1;
1754#endif /* CONFIG_NO_RADIUS */
1755
1756	if (hapd->conf->default_wep_key_len) {
1757		for (i = 0; i < 4; i++)
1758			hostapd_drv_set_key(hapd->conf->iface, hapd,
1759					    WPA_ALG_NONE, NULL, i, 0, NULL, 0,
1760					    NULL, 0);
1761
1762		ieee802_1x_rekey(hapd, NULL);
1763
1764		if (hapd->eapol_auth->default_wep_key == NULL)
1765			return -1;
1766	}
1767
1768	return 0;
1769}
1770
1771
1772void ieee802_1x_deinit(struct hostapd_data *hapd)
1773{
1774	eloop_cancel_timeout(ieee802_1x_rekey, hapd, NULL);
1775
1776	if (hapd->driver != NULL &&
1777	    (hapd->conf->ieee802_1x || hapd->conf->wpa))
1778		hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0);
1779
1780	eapol_auth_deinit(hapd->eapol_auth);
1781	hapd->eapol_auth = NULL;
1782}
1783
1784
1785int ieee802_1x_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
1786			 const u8 *buf, size_t len, int ack)
1787{
1788	struct ieee80211_hdr *hdr;
1789	u8 *pos;
1790	const unsigned char rfc1042_hdr[ETH_ALEN] =
1791		{ 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
1792
1793	if (sta == NULL)
1794		return -1;
1795	if (len < sizeof(*hdr) + sizeof(rfc1042_hdr) + 2)
1796		return 0;
1797
1798	hdr = (struct ieee80211_hdr *) buf;
1799	pos = (u8 *) (hdr + 1);
1800	if (os_memcmp(pos, rfc1042_hdr, sizeof(rfc1042_hdr)) != 0)
1801		return 0;
1802	pos += sizeof(rfc1042_hdr);
1803	if (WPA_GET_BE16(pos) != ETH_P_PAE)
1804		return 0;
1805	pos += 2;
1806
1807	return ieee802_1x_eapol_tx_status(hapd, sta, pos, buf + len - pos,
1808					  ack);
1809}
1810
1811
1812int ieee802_1x_eapol_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
1813			       const u8 *buf, int len, int ack)
1814{
1815	const struct ieee802_1x_hdr *xhdr =
1816		(const struct ieee802_1x_hdr *) buf;
1817	const u8 *pos = buf + sizeof(*xhdr);
1818	struct ieee802_1x_eapol_key *key;
1819
1820	if (len < (int) sizeof(*xhdr))
1821		return 0;
1822	wpa_printf(MSG_DEBUG, "IEEE 802.1X: " MACSTR " TX status - version=%d "
1823		   "type=%d length=%d - ack=%d",
1824		   MAC2STR(sta->addr), xhdr->version, xhdr->type,
1825		   be_to_host16(xhdr->length), ack);
1826
1827	if (xhdr->type != IEEE802_1X_TYPE_EAPOL_KEY)
1828		return 0;
1829
1830	if (pos + sizeof(struct wpa_eapol_key) <= buf + len) {
1831		const struct wpa_eapol_key *wpa;
1832		wpa = (const struct wpa_eapol_key *) pos;
1833		if (wpa->type == EAPOL_KEY_TYPE_RSN ||
1834		    wpa->type == EAPOL_KEY_TYPE_WPA)
1835			wpa_auth_eapol_key_tx_status(hapd->wpa_auth,
1836						     sta->wpa_sm, ack);
1837	}
1838
1839	/* EAPOL EAP-Packet packets are eventually re-sent by either Supplicant
1840	 * or Authenticator state machines, but EAPOL-Key packets are not
1841	 * retransmitted in case of failure. Try to re-send failed EAPOL-Key
1842	 * packets couple of times because otherwise STA keys become
1843	 * unsynchronized with AP. */
1844	if (!ack && pos + sizeof(*key) <= buf + len) {
1845		key = (struct ieee802_1x_eapol_key *) pos;
1846		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1847			       HOSTAPD_LEVEL_DEBUG, "did not Ack EAPOL-Key "
1848			       "frame (%scast index=%d)",
1849			       key->key_index & BIT(7) ? "uni" : "broad",
1850			       key->key_index & ~BIT(7));
1851		/* TODO: re-send EAPOL-Key couple of times (with short delay
1852		 * between them?). If all attempt fail, report error and
1853		 * deauthenticate STA so that it will get new keys when
1854		 * authenticating again (e.g., after returning in range).
1855		 * Separate limit/transmit state needed both for unicast and
1856		 * broadcast keys(?) */
1857	}
1858	/* TODO: could move unicast key configuration from ieee802_1x_tx_key()
1859	 * to here and change the key only if the EAPOL-Key packet was Acked.
1860	 */
1861
1862	return 1;
1863}
1864
1865
1866u8 * ieee802_1x_get_identity(struct eapol_state_machine *sm, size_t *len)
1867{
1868	if (sm == NULL || sm->identity == NULL)
1869		return NULL;
1870
1871	*len = sm->identity_len;
1872	return sm->identity;
1873}
1874
1875
1876u8 * ieee802_1x_get_radius_class(struct eapol_state_machine *sm, size_t *len,
1877				 int idx)
1878{
1879	if (sm == NULL || sm->radius_class.attr == NULL ||
1880	    idx >= (int) sm->radius_class.count)
1881		return NULL;
1882
1883	*len = sm->radius_class.attr[idx].len;
1884	return sm->radius_class.attr[idx].data;
1885}
1886
1887
1888struct wpabuf * ieee802_1x_get_radius_cui(struct eapol_state_machine *sm)
1889{
1890	if (sm == NULL)
1891		return NULL;
1892	return sm->radius_cui;
1893}
1894
1895
1896const u8 * ieee802_1x_get_key(struct eapol_state_machine *sm, size_t *len)
1897{
1898	*len = 0;
1899	if (sm == NULL)
1900		return NULL;
1901
1902	*len = sm->eap_if->eapKeyDataLen;
1903	return sm->eap_if->eapKeyData;
1904}
1905
1906
1907void ieee802_1x_notify_port_enabled(struct eapol_state_machine *sm,
1908				    int enabled)
1909{
1910	if (sm == NULL)
1911		return;
1912	sm->eap_if->portEnabled = enabled ? TRUE : FALSE;
1913	eapol_auth_step(sm);
1914}
1915
1916
1917void ieee802_1x_notify_port_valid(struct eapol_state_machine *sm,
1918				  int valid)
1919{
1920	if (sm == NULL)
1921		return;
1922	sm->portValid = valid ? TRUE : FALSE;
1923	eapol_auth_step(sm);
1924}
1925
1926
1927void ieee802_1x_notify_pre_auth(struct eapol_state_machine *sm, int pre_auth)
1928{
1929	if (sm == NULL)
1930		return;
1931	if (pre_auth)
1932		sm->flags |= EAPOL_SM_PREAUTH;
1933	else
1934		sm->flags &= ~EAPOL_SM_PREAUTH;
1935}
1936
1937
1938static const char * bool_txt(Boolean bool)
1939{
1940	return bool ? "TRUE" : "FALSE";
1941}
1942
1943
1944int ieee802_1x_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
1945{
1946	/* TODO */
1947	return 0;
1948}
1949
1950
1951int ieee802_1x_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
1952			   char *buf, size_t buflen)
1953{
1954	int len = 0, ret;
1955	struct eapol_state_machine *sm = sta->eapol_sm;
1956	struct os_time t;
1957
1958	if (sm == NULL)
1959		return 0;
1960
1961	ret = os_snprintf(buf + len, buflen - len,
1962			  "dot1xPaePortNumber=%d\n"
1963			  "dot1xPaePortProtocolVersion=%d\n"
1964			  "dot1xPaePortCapabilities=1\n"
1965			  "dot1xPaePortInitialize=%d\n"
1966			  "dot1xPaePortReauthenticate=FALSE\n",
1967			  sta->aid,
1968			  EAPOL_VERSION,
1969			  sm->initialize);
1970	if (ret < 0 || (size_t) ret >= buflen - len)
1971		return len;
1972	len += ret;
1973
1974	/* dot1xAuthConfigTable */
1975	ret = os_snprintf(buf + len, buflen - len,
1976			  "dot1xAuthPaeState=%d\n"
1977			  "dot1xAuthBackendAuthState=%d\n"
1978			  "dot1xAuthAdminControlledDirections=%d\n"
1979			  "dot1xAuthOperControlledDirections=%d\n"
1980			  "dot1xAuthAuthControlledPortStatus=%d\n"
1981			  "dot1xAuthAuthControlledPortControl=%d\n"
1982			  "dot1xAuthQuietPeriod=%u\n"
1983			  "dot1xAuthServerTimeout=%u\n"
1984			  "dot1xAuthReAuthPeriod=%u\n"
1985			  "dot1xAuthReAuthEnabled=%s\n"
1986			  "dot1xAuthKeyTxEnabled=%s\n",
1987			  sm->auth_pae_state + 1,
1988			  sm->be_auth_state + 1,
1989			  sm->adminControlledDirections,
1990			  sm->operControlledDirections,
1991			  sm->authPortStatus,
1992			  sm->portControl,
1993			  sm->quietPeriod,
1994			  sm->serverTimeout,
1995			  sm->reAuthPeriod,
1996			  bool_txt(sm->reAuthEnabled),
1997			  bool_txt(sm->keyTxEnabled));
1998	if (ret < 0 || (size_t) ret >= buflen - len)
1999		return len;
2000	len += ret;
2001
2002	/* dot1xAuthStatsTable */
2003	ret = os_snprintf(buf + len, buflen - len,
2004			  "dot1xAuthEapolFramesRx=%u\n"
2005			  "dot1xAuthEapolFramesTx=%u\n"
2006			  "dot1xAuthEapolStartFramesRx=%u\n"
2007			  "dot1xAuthEapolLogoffFramesRx=%u\n"
2008			  "dot1xAuthEapolRespIdFramesRx=%u\n"
2009			  "dot1xAuthEapolRespFramesRx=%u\n"
2010			  "dot1xAuthEapolReqIdFramesTx=%u\n"
2011			  "dot1xAuthEapolReqFramesTx=%u\n"
2012			  "dot1xAuthInvalidEapolFramesRx=%u\n"
2013			  "dot1xAuthEapLengthErrorFramesRx=%u\n"
2014			  "dot1xAuthLastEapolFrameVersion=%u\n"
2015			  "dot1xAuthLastEapolFrameSource=" MACSTR "\n",
2016			  sm->dot1xAuthEapolFramesRx,
2017			  sm->dot1xAuthEapolFramesTx,
2018			  sm->dot1xAuthEapolStartFramesRx,
2019			  sm->dot1xAuthEapolLogoffFramesRx,
2020			  sm->dot1xAuthEapolRespIdFramesRx,
2021			  sm->dot1xAuthEapolRespFramesRx,
2022			  sm->dot1xAuthEapolReqIdFramesTx,
2023			  sm->dot1xAuthEapolReqFramesTx,
2024			  sm->dot1xAuthInvalidEapolFramesRx,
2025			  sm->dot1xAuthEapLengthErrorFramesRx,
2026			  sm->dot1xAuthLastEapolFrameVersion,
2027			  MAC2STR(sm->addr));
2028	if (ret < 0 || (size_t) ret >= buflen - len)
2029		return len;
2030	len += ret;
2031
2032	/* dot1xAuthDiagTable */
2033	ret = os_snprintf(buf + len, buflen - len,
2034			  "dot1xAuthEntersConnecting=%u\n"
2035			  "dot1xAuthEapLogoffsWhileConnecting=%u\n"
2036			  "dot1xAuthEntersAuthenticating=%u\n"
2037			  "dot1xAuthAuthSuccessesWhileAuthenticating=%u\n"
2038			  "dot1xAuthAuthTimeoutsWhileAuthenticating=%u\n"
2039			  "dot1xAuthAuthFailWhileAuthenticating=%u\n"
2040			  "dot1xAuthAuthEapStartsWhileAuthenticating=%u\n"
2041			  "dot1xAuthAuthEapLogoffWhileAuthenticating=%u\n"
2042			  "dot1xAuthAuthReauthsWhileAuthenticated=%u\n"
2043			  "dot1xAuthAuthEapStartsWhileAuthenticated=%u\n"
2044			  "dot1xAuthAuthEapLogoffWhileAuthenticated=%u\n"
2045			  "dot1xAuthBackendResponses=%u\n"
2046			  "dot1xAuthBackendAccessChallenges=%u\n"
2047			  "dot1xAuthBackendOtherRequestsToSupplicant=%u\n"
2048			  "dot1xAuthBackendAuthSuccesses=%u\n"
2049			  "dot1xAuthBackendAuthFails=%u\n",
2050			  sm->authEntersConnecting,
2051			  sm->authEapLogoffsWhileConnecting,
2052			  sm->authEntersAuthenticating,
2053			  sm->authAuthSuccessesWhileAuthenticating,
2054			  sm->authAuthTimeoutsWhileAuthenticating,
2055			  sm->authAuthFailWhileAuthenticating,
2056			  sm->authAuthEapStartsWhileAuthenticating,
2057			  sm->authAuthEapLogoffWhileAuthenticating,
2058			  sm->authAuthReauthsWhileAuthenticated,
2059			  sm->authAuthEapStartsWhileAuthenticated,
2060			  sm->authAuthEapLogoffWhileAuthenticated,
2061			  sm->backendResponses,
2062			  sm->backendAccessChallenges,
2063			  sm->backendOtherRequestsToSupplicant,
2064			  sm->backendAuthSuccesses,
2065			  sm->backendAuthFails);
2066	if (ret < 0 || (size_t) ret >= buflen - len)
2067		return len;
2068	len += ret;
2069
2070	/* dot1xAuthSessionStatsTable */
2071	os_get_time(&t);
2072	ret = os_snprintf(buf + len, buflen - len,
2073			  /* TODO: dot1xAuthSessionOctetsRx */
2074			  /* TODO: dot1xAuthSessionOctetsTx */
2075			  /* TODO: dot1xAuthSessionFramesRx */
2076			  /* TODO: dot1xAuthSessionFramesTx */
2077			  "dot1xAuthSessionId=%08X-%08X\n"
2078			  "dot1xAuthSessionAuthenticMethod=%d\n"
2079			  "dot1xAuthSessionTime=%u\n"
2080			  "dot1xAuthSessionTerminateCause=999\n"
2081			  "dot1xAuthSessionUserName=%s\n",
2082			  sta->acct_session_id_hi, sta->acct_session_id_lo,
2083			  (wpa_key_mgmt_wpa_ieee8021x(
2084				   wpa_auth_sta_key_mgmt(sta->wpa_sm))) ?
2085			  1 : 2,
2086			  (unsigned int) (t.sec - sta->acct_session_start),
2087			  sm->identity);
2088	if (ret < 0 || (size_t) ret >= buflen - len)
2089		return len;
2090	len += ret;
2091
2092	return len;
2093}
2094
2095
2096static void ieee802_1x_finished(struct hostapd_data *hapd,
2097				struct sta_info *sta, int success)
2098{
2099	const u8 *key;
2100	size_t len;
2101	/* TODO: get PMKLifetime from WPA parameters */
2102	static const int dot11RSNAConfigPMKLifetime = 43200;
2103
2104	key = ieee802_1x_get_key(sta->eapol_sm, &len);
2105	if (success && key && len >= PMK_LEN &&
2106	    wpa_auth_pmksa_add(sta->wpa_sm, key, dot11RSNAConfigPMKLifetime,
2107			       sta->eapol_sm) == 0) {
2108		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
2109			       HOSTAPD_LEVEL_DEBUG,
2110			       "Added PMKSA cache entry (IEEE 802.1X)");
2111	}
2112
2113	if (!success) {
2114		/*
2115		 * Many devices require deauthentication after WPS provisioning
2116		 * and some may not be be able to do that themselves, so
2117		 * disconnect the client here. In addition, this may also
2118		 * benefit IEEE 802.1X/EAPOL authentication cases, too since
2119		 * the EAPOL PAE state machine would remain in HELD state for
2120		 * considerable amount of time and some EAP methods, like
2121		 * EAP-FAST with anonymous provisioning, may require another
2122		 * EAPOL authentication to be started to complete connection.
2123		 */
2124		wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "IEEE 802.1X: Force "
2125			"disconnection after EAP-Failure");
2126		/* Add a small sleep to increase likelihood of previously
2127		 * requested EAP-Failure TX getting out before this should the
2128		 * driver reorder operations.
2129		 */
2130		os_sleep(0, 10000);
2131#ifndef ANDROID_P2P
2132		/* We need not do this for driver. For AP-SME flags if we send this disassoc,
2133		  * the p2p_client is gettig disassoc after it has completed the assoc
2134		  */
2135		ap_sta_disconnect(hapd, sta, sta->addr,
2136				  WLAN_REASON_IEEE_802_1X_AUTH_FAILED);
2137#endif
2138	}
2139}
2140