2 * hostapd / IEEE 802.1X-2004 Authenticator
3 * Copyright (c) 2002-2008, Jouni Malinen <j@w1.fi>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 * Alternatively, this software may be distributed under the terms of BSD
12 * See README and COPYING for more details.
18 #include "ieee802_1x.h"
19 #include "accounting.h"
20 #include "radius/radius.h"
21 #include "radius/radius_client.h"
29 #include "pmksa_cache.h"
31 #include "hw_features.h"
32 #include "eap_server/eap.h"
33 #include "ieee802_11_defs.h"
36 static void ieee802_1x_finished(struct hostapd_data *hapd,
37 struct sta_info *sta, int success);
40 static void ieee802_1x_send(struct hostapd_data *hapd, struct sta_info *sta,
41 u8 type, const u8 *data, size_t datalen)
44 struct ieee802_1x_hdr *xhdr;
48 len = sizeof(*xhdr) + datalen;
51 wpa_printf(MSG_ERROR, "malloc() failed for "
52 "ieee802_1x_send(len=%lu)",
57 xhdr = (struct ieee802_1x_hdr *) buf;
58 xhdr->version = hapd->conf->eapol_version;
60 xhdr->length = host_to_be16(datalen);
62 if (datalen > 0 && data != NULL)
63 os_memcpy(xhdr + 1, data, datalen);
65 if (wpa_auth_pairwise_set(sta->wpa_sm))
67 if (sta->flags & WLAN_STA_PREAUTH) {
68 rsn_preauth_send(hapd, sta, buf, len);
70 hostapd_send_eapol(hapd, sta->addr, buf, len, encrypt);
77 void ieee802_1x_set_sta_authorized(struct hostapd_data *hapd,
78 struct sta_info *sta, int authorized)
82 if (sta->flags & WLAN_STA_PREAUTH)
86 sta->flags |= WLAN_STA_AUTHORIZED;
87 res = hostapd_sta_set_flags(hapd, sta->addr, sta->flags,
88 WLAN_STA_AUTHORIZED, ~0);
89 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
90 HOSTAPD_LEVEL_DEBUG, "authorizing port");
92 sta->flags &= ~WLAN_STA_AUTHORIZED;
93 res = hostapd_sta_set_flags(hapd, sta->addr, sta->flags,
94 0, ~WLAN_STA_AUTHORIZED);
95 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
96 HOSTAPD_LEVEL_DEBUG, "unauthorizing port");
99 if (res && errno != ENOENT) {
100 printf("Could not set station " MACSTR " flags for kernel "
101 "driver (errno=%d).\n", MAC2STR(sta->addr), errno);
105 accounting_sta_start(hapd, sta);
109 static void ieee802_1x_tx_key_one(struct hostapd_data *hapd,
110 struct sta_info *sta,
111 int idx, int broadcast,
112 u8 *key_data, size_t key_len)
115 struct ieee802_1x_hdr *hdr;
116 struct ieee802_1x_eapol_key *key;
117 size_t len, ekey_len;
118 struct eapol_state_machine *sm = sta->eapol_sm;
123 len = sizeof(*key) + key_len;
124 buf = os_zalloc(sizeof(*hdr) + len);
128 hdr = (struct ieee802_1x_hdr *) buf;
129 key = (struct ieee802_1x_eapol_key *) (hdr + 1);
130 key->type = EAPOL_KEY_TYPE_RC4;
131 key->key_length = htons(key_len);
132 wpa_get_ntp_timestamp(key->replay_counter);
134 if (os_get_random(key->key_iv, sizeof(key->key_iv))) {
135 wpa_printf(MSG_ERROR, "Could not get random numbers");
140 key->key_index = idx | (broadcast ? 0 : BIT(7));
141 if (hapd->conf->eapol_key_index_workaround) {
142 /* According to some information, WinXP Supplicant seems to
143 * interpret bit7 as an indication whether the key is to be
144 * activated, so make it possible to enable workaround that
145 * sets this bit for all keys. */
146 key->key_index |= BIT(7);
149 /* Key is encrypted using "Key-IV + MSK[0..31]" as the RC4-key and
150 * MSK[32..63] is used to sign the message. */
151 if (sm->eap_if->eapKeyData == NULL || sm->eap_if->eapKeyDataLen < 64) {
152 wpa_printf(MSG_ERROR, "No eapKeyData available for encrypting "
153 "and signing EAPOL-Key");
157 os_memcpy((u8 *) (key + 1), key_data, key_len);
158 ekey_len = sizeof(key->key_iv) + 32;
159 ekey = os_malloc(ekey_len);
161 wpa_printf(MSG_ERROR, "Could not encrypt key");
165 os_memcpy(ekey, key->key_iv, sizeof(key->key_iv));
166 os_memcpy(ekey + sizeof(key->key_iv), sm->eap_if->eapKeyData, 32);
167 rc4((u8 *) (key + 1), key_len, ekey, ekey_len);
170 /* This header is needed here for HMAC-MD5, but it will be regenerated
171 * in ieee802_1x_send() */
172 hdr->version = hapd->conf->eapol_version;
173 hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
174 hdr->length = host_to_be16(len);
175 hmac_md5(sm->eap_if->eapKeyData + 32, 32, buf, sizeof(*hdr) + len,
178 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key to " MACSTR
179 " (%s index=%d)", MAC2STR(sm->addr),
180 broadcast ? "broadcast" : "unicast", idx);
181 ieee802_1x_send(hapd, sta, IEEE802_1X_TYPE_EAPOL_KEY, (u8 *) key, len);
183 sta->eapol_sm->dot1xAuthEapolFramesTx++;
188 #ifndef CONFIG_NO_VLAN
189 static struct hostapd_wep_keys *
190 ieee802_1x_group_alloc(struct hostapd_data *hapd, const char *ifname)
192 struct hostapd_wep_keys *key;
194 key = os_zalloc(sizeof(*key));
198 key->default_len = hapd->conf->default_wep_key_len;
200 if (key->idx >= hapd->conf->broadcast_key_idx_max ||
201 key->idx < hapd->conf->broadcast_key_idx_min)
202 key->idx = hapd->conf->broadcast_key_idx_min;
206 if (!key->key[key->idx])
207 key->key[key->idx] = os_malloc(key->default_len);
208 if (key->key[key->idx] == NULL ||
209 os_get_random(key->key[key->idx], key->default_len)) {
210 printf("Could not generate random WEP key (dynamic VLAN).\n");
211 os_free(key->key[key->idx]);
212 key->key[key->idx] = NULL;
216 key->len[key->idx] = key->default_len;
218 wpa_printf(MSG_DEBUG, "%s: Default WEP idx %d for dynamic VLAN\n",
220 wpa_hexdump_key(MSG_DEBUG, "Default WEP key (dynamic VLAN)",
221 key->key[key->idx], key->len[key->idx]);
223 if (hostapd_set_key(ifname, hapd, WPA_ALG_WEP, NULL, key->idx, 1,
224 NULL, 0, key->key[key->idx], key->len[key->idx]))
225 printf("Could not set dynamic VLAN WEP encryption key.\n");
227 hostapd_set_ieee8021x(ifname, hapd, 1);
233 static struct hostapd_wep_keys *
234 ieee802_1x_get_group(struct hostapd_data *hapd, struct hostapd_ssid *ssid,
242 if (vlan_id <= ssid->max_dyn_vlan_keys && ssid->dyn_vlan_keys &&
243 ssid->dyn_vlan_keys[vlan_id])
244 return ssid->dyn_vlan_keys[vlan_id];
246 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Creating new group "
247 "state machine for VLAN ID %lu",
248 (unsigned long) vlan_id);
250 ifname = hostapd_get_vlan_id_ifname(hapd->conf->vlan, vlan_id);
251 if (ifname == NULL) {
252 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Unknown VLAN ID %lu - "
253 "cannot create group key state machine",
254 (unsigned long) vlan_id);
258 if (ssid->dyn_vlan_keys == NULL) {
259 int size = (vlan_id + 1) * sizeof(ssid->dyn_vlan_keys[0]);
260 ssid->dyn_vlan_keys = os_zalloc(size);
261 if (ssid->dyn_vlan_keys == NULL)
263 ssid->max_dyn_vlan_keys = vlan_id;
266 if (ssid->max_dyn_vlan_keys < vlan_id) {
267 struct hostapd_wep_keys **na;
268 int size = (vlan_id + 1) * sizeof(ssid->dyn_vlan_keys[0]);
269 na = os_realloc(ssid->dyn_vlan_keys, size);
272 ssid->dyn_vlan_keys = na;
273 os_memset(&ssid->dyn_vlan_keys[ssid->max_dyn_vlan_keys + 1], 0,
274 (vlan_id - ssid->max_dyn_vlan_keys) *
275 sizeof(ssid->dyn_vlan_keys[0]));
276 ssid->max_dyn_vlan_keys = vlan_id;
279 ssid->dyn_vlan_keys[vlan_id] = ieee802_1x_group_alloc(hapd, ifname);
281 return ssid->dyn_vlan_keys[vlan_id];
283 #endif /* CONFIG_NO_VLAN */
286 void ieee802_1x_tx_key(struct hostapd_data *hapd, struct sta_info *sta)
288 struct eapol_state_machine *sm = sta->eapol_sm;
289 #ifndef CONFIG_NO_VLAN
290 struct hostapd_wep_keys *key = NULL;
292 #endif /* CONFIG_NO_VLAN */
294 if (sm == NULL || !sm->eap_if->eapKeyData)
297 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key(s) to " MACSTR,
300 #ifndef CONFIG_NO_VLAN
301 vlan_id = sta->vlan_id;
302 if (vlan_id < 0 || vlan_id > MAX_VLAN_ID)
306 key = ieee802_1x_get_group(hapd, sta->ssid, vlan_id);
307 if (key && key->key[key->idx])
308 ieee802_1x_tx_key_one(hapd, sta, key->idx, 1,
312 #endif /* CONFIG_NO_VLAN */
313 if (hapd->default_wep_key) {
314 ieee802_1x_tx_key_one(hapd, sta, hapd->default_wep_key_idx, 1,
315 hapd->default_wep_key,
316 hapd->conf->default_wep_key_len);
319 if (hapd->conf->individual_wep_key_len > 0) {
321 ikey = os_malloc(hapd->conf->individual_wep_key_len);
323 os_get_random(ikey, hapd->conf->individual_wep_key_len)) {
324 wpa_printf(MSG_ERROR, "Could not generate random "
325 "individual WEP key.");
330 wpa_hexdump_key(MSG_DEBUG, "Individual WEP key",
331 ikey, hapd->conf->individual_wep_key_len);
333 ieee802_1x_tx_key_one(hapd, sta, 0, 0, ikey,
334 hapd->conf->individual_wep_key_len);
336 /* TODO: set encryption in TX callback, i.e., only after STA
337 * has ACKed EAPOL-Key frame */
338 if (hostapd_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
339 sta->addr, 0, 1, NULL, 0, ikey,
340 hapd->conf->individual_wep_key_len)) {
341 wpa_printf(MSG_ERROR, "Could not set individual WEP "
350 const char *radius_mode_txt(struct hostapd_data *hapd)
352 if (hapd->iface->current_mode == NULL)
355 switch (hapd->iface->current_mode->mode) {
356 case HOSTAPD_MODE_IEEE80211A:
358 case HOSTAPD_MODE_IEEE80211G:
360 case HOSTAPD_MODE_IEEE80211B:
367 int radius_sta_rate(struct hostapd_data *hapd, struct sta_info *sta)
372 for (i = 0; i < sta->supported_rates_len; i++)
373 if ((sta->supported_rates[i] & 0x7f) > rate)
374 rate = sta->supported_rates[i] & 0x7f;
380 #ifndef CONFIG_NO_RADIUS
381 static void ieee802_1x_learn_identity(struct hostapd_data *hapd,
382 struct eapol_state_machine *sm,
383 const u8 *eap, size_t len)
388 if (len <= sizeof(struct eap_hdr) ||
389 eap[sizeof(struct eap_hdr)] != EAP_TYPE_IDENTITY)
392 identity = eap_get_identity(sm->eap, &identity_len);
393 if (identity == NULL)
396 /* Save station identity for future RADIUS packets */
397 os_free(sm->identity);
398 sm->identity = os_malloc(identity_len + 1);
399 if (sm->identity == NULL) {
400 sm->identity_len = 0;
404 os_memcpy(sm->identity, identity, identity_len);
405 sm->identity_len = identity_len;
406 sm->identity[identity_len] = '\0';
407 hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
408 HOSTAPD_LEVEL_DEBUG, "STA identity '%s'", sm->identity);
409 sm->dot1xAuthEapolRespIdFramesRx++;
413 static void ieee802_1x_encapsulate_radius(struct hostapd_data *hapd,
414 struct sta_info *sta,
415 const u8 *eap, size_t len)
417 struct radius_msg *msg;
419 struct eapol_state_machine *sm = sta->eapol_sm;
424 ieee802_1x_learn_identity(hapd, sm, eap, len);
426 wpa_printf(MSG_DEBUG, "Encapsulating EAP message into a RADIUS "
429 sm->radius_identifier = radius_client_get_id(hapd->radius);
430 msg = radius_msg_new(RADIUS_CODE_ACCESS_REQUEST,
431 sm->radius_identifier);
433 printf("Could not create net RADIUS packet\n");
437 radius_msg_make_authenticator(msg, (u8 *) sta, sizeof(*sta));
440 !radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME,
441 sm->identity, sm->identity_len)) {
442 printf("Could not add User-Name\n");
446 if (hapd->conf->own_ip_addr.af == AF_INET &&
447 !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS,
448 (u8 *) &hapd->conf->own_ip_addr.u.v4, 4)) {
449 printf("Could not add NAS-IP-Address\n");
454 if (hapd->conf->own_ip_addr.af == AF_INET6 &&
455 !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IPV6_ADDRESS,
456 (u8 *) &hapd->conf->own_ip_addr.u.v6, 16)) {
457 printf("Could not add NAS-IPv6-Address\n");
460 #endif /* CONFIG_IPV6 */
462 if (hapd->conf->nas_identifier &&
463 !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IDENTIFIER,
464 (u8 *) hapd->conf->nas_identifier,
465 os_strlen(hapd->conf->nas_identifier))) {
466 printf("Could not add NAS-Identifier\n");
470 if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT, sta->aid)) {
471 printf("Could not add NAS-Port\n");
475 os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT ":%s",
476 MAC2STR(hapd->own_addr), hapd->conf->ssid.ssid);
477 buf[sizeof(buf) - 1] = '\0';
478 if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLED_STATION_ID,
479 (u8 *) buf, os_strlen(buf))) {
480 printf("Could not add Called-Station-Id\n");
484 os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
486 buf[sizeof(buf) - 1] = '\0';
487 if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID,
488 (u8 *) buf, os_strlen(buf))) {
489 printf("Could not add Calling-Station-Id\n");
493 /* TODO: should probably check MTU from driver config; 2304 is max for
494 * IEEE 802.11, but use 1400 to avoid problems with too large packets
496 if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_FRAMED_MTU, 1400)) {
497 printf("Could not add Framed-MTU\n");
501 if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT_TYPE,
502 RADIUS_NAS_PORT_TYPE_IEEE_802_11)) {
503 printf("Could not add NAS-Port-Type\n");
507 if (sta->flags & WLAN_STA_PREAUTH) {
508 os_strlcpy(buf, "IEEE 802.11i Pre-Authentication",
511 os_snprintf(buf, sizeof(buf), "CONNECT %d%sMbps %s",
512 radius_sta_rate(hapd, sta) / 2,
513 (radius_sta_rate(hapd, sta) & 1) ? ".5" : "",
514 radius_mode_txt(hapd));
515 buf[sizeof(buf) - 1] = '\0';
517 if (!radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO,
518 (u8 *) buf, os_strlen(buf))) {
519 printf("Could not add Connect-Info\n");
523 if (eap && !radius_msg_add_eap(msg, eap, len)) {
524 printf("Could not add EAP-Message\n");
528 /* State attribute must be copied if and only if this packet is
529 * Access-Request reply to the previous Access-Challenge */
530 if (sm->last_recv_radius && sm->last_recv_radius->hdr->code ==
531 RADIUS_CODE_ACCESS_CHALLENGE) {
532 int res = radius_msg_copy_attr(msg, sm->last_recv_radius,
535 printf("Could not copy State attribute from previous "
536 "Access-Challenge\n");
540 wpa_printf(MSG_DEBUG, "Copied RADIUS State Attribute");
544 radius_client_send(hapd->radius, msg, RADIUS_AUTH, sta->addr);
548 radius_msg_free(msg);
551 #endif /* CONFIG_NO_RADIUS */
554 char *eap_type_text(u8 type)
557 case EAP_TYPE_IDENTITY: return "Identity";
558 case EAP_TYPE_NOTIFICATION: return "Notification";
559 case EAP_TYPE_NAK: return "Nak";
560 case EAP_TYPE_MD5: return "MD5-Challenge";
561 case EAP_TYPE_OTP: return "One-Time Password";
562 case EAP_TYPE_GTC: return "Generic Token Card";
563 case EAP_TYPE_TLS: return "TLS";
564 case EAP_TYPE_TTLS: return "TTLS";
565 case EAP_TYPE_PEAP: return "PEAP";
566 case EAP_TYPE_SIM: return "SIM";
567 case EAP_TYPE_FAST: return "FAST";
568 case EAP_TYPE_SAKE: return "SAKE";
569 case EAP_TYPE_PSK: return "PSK";
570 case EAP_TYPE_PAX: return "PAX";
571 default: return "Unknown";
576 static void handle_eap_response(struct hostapd_data *hapd,
577 struct sta_info *sta, struct eap_hdr *eap,
581 struct eapol_state_machine *sm = sta->eapol_sm;
585 data = (u8 *) (eap + 1);
587 if (len < sizeof(*eap) + 1) {
588 printf("handle_eap_response: too short response data\n");
592 sm->eap_type_supp = type = data[0];
594 hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
595 HOSTAPD_LEVEL_DEBUG, "received EAP packet (code=%d "
596 "id=%d len=%d) from STA: EAP Response-%s (%d)",
597 eap->code, eap->identifier, be_to_host16(eap->length),
598 eap_type_text(type), type);
600 sm->dot1xAuthEapolRespFramesRx++;
602 wpabuf_free(sm->eap_if->eapRespData);
603 sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len);
608 /* Process incoming EAP packet from Supplicant */
609 static void handle_eap(struct hostapd_data *hapd, struct sta_info *sta,
615 if (len < sizeof(*eap)) {
616 printf(" too short EAP packet\n");
620 eap = (struct eap_hdr *) buf;
622 eap_len = be_to_host16(eap->length);
623 wpa_printf(MSG_DEBUG, "EAP: code=%d identifier=%d length=%d",
624 eap->code, eap->identifier, eap_len);
625 if (eap_len < sizeof(*eap)) {
626 wpa_printf(MSG_DEBUG, " Invalid EAP length");
628 } else if (eap_len > len) {
629 wpa_printf(MSG_DEBUG, " Too short frame to contain this EAP "
632 } else if (eap_len < len) {
633 wpa_printf(MSG_DEBUG, " Ignoring %lu extra bytes after EAP "
634 "packet", (unsigned long) len - eap_len);
638 case EAP_CODE_REQUEST:
639 wpa_printf(MSG_DEBUG, " (request)");
641 case EAP_CODE_RESPONSE:
642 wpa_printf(MSG_DEBUG, " (response)");
643 handle_eap_response(hapd, sta, eap, eap_len);
645 case EAP_CODE_SUCCESS:
646 wpa_printf(MSG_DEBUG, " (success)");
648 case EAP_CODE_FAILURE:
649 wpa_printf(MSG_DEBUG, " (failure)");
652 wpa_printf(MSG_DEBUG, " (unknown code)");
659 * ieee802_1x_receive - Process the EAPOL frames from the Supplicant
660 * @hapd: hostapd BSS data
661 * @sa: Source address (sender of the EAPOL frame)
663 * @len: Length of buf in octets
665 * This function is called for each incoming EAPOL frame from the interface
667 void ieee802_1x_receive(struct hostapd_data *hapd, const u8 *sa, const u8 *buf,
670 struct sta_info *sta;
671 struct ieee802_1x_hdr *hdr;
672 struct ieee802_1x_eapol_key *key;
674 struct rsn_pmksa_cache_entry *pmksa;
676 if (!hapd->conf->ieee802_1x && !hapd->conf->wpa &&
677 !hapd->conf->wps_state)
680 wpa_printf(MSG_DEBUG, "IEEE 802.1X: %lu bytes from " MACSTR,
681 (unsigned long) len, MAC2STR(sa));
682 sta = ap_get_sta(hapd, sa);
683 if (!sta || !(sta->flags & WLAN_STA_ASSOC)) {
684 wpa_printf(MSG_DEBUG, "IEEE 802.1X data frame from not "
689 if (len < sizeof(*hdr)) {
690 printf(" too short IEEE 802.1X packet\n");
694 hdr = (struct ieee802_1x_hdr *) buf;
695 datalen = be_to_host16(hdr->length);
696 wpa_printf(MSG_DEBUG, " IEEE 802.1X: version=%d type=%d length=%d",
697 hdr->version, hdr->type, datalen);
699 if (len - sizeof(*hdr) < datalen) {
700 printf(" frame too short for this IEEE 802.1X packet\n");
702 sta->eapol_sm->dot1xAuthEapLengthErrorFramesRx++;
705 if (len - sizeof(*hdr) > datalen) {
706 wpa_printf(MSG_DEBUG, " ignoring %lu extra octets after "
707 "IEEE 802.1X packet",
708 (unsigned long) len - sizeof(*hdr) - datalen);
712 sta->eapol_sm->dot1xAuthLastEapolFrameVersion = hdr->version;
713 sta->eapol_sm->dot1xAuthEapolFramesRx++;
716 key = (struct ieee802_1x_eapol_key *) (hdr + 1);
717 if (datalen >= sizeof(struct ieee802_1x_eapol_key) &&
718 hdr->type == IEEE802_1X_TYPE_EAPOL_KEY &&
719 (key->type == EAPOL_KEY_TYPE_WPA ||
720 key->type == EAPOL_KEY_TYPE_RSN)) {
721 wpa_receive(hapd->wpa_auth, sta->wpa_sm, (u8 *) hdr,
722 sizeof(*hdr) + datalen);
726 if ((!hapd->conf->ieee802_1x &&
727 !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) ||
728 wpa_key_mgmt_wpa_psk(wpa_auth_sta_key_mgmt(sta->wpa_sm)))
731 if (!sta->eapol_sm) {
732 sta->eapol_sm = eapol_auth_alloc(hapd->eapol_auth, sta->addr,
733 sta->flags & WLAN_STA_PREAUTH,
739 if (!hapd->conf->ieee802_1x &&
740 ((sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) ==
741 WLAN_STA_MAYBE_WPS)) {
743 * Delay EAPOL frame transmission until a possible WPS
744 * STA initiates the handshake with EAPOL-Start.
746 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
748 #endif /* CONFIG_WPS */
750 sta->eapol_sm->eap_if->portEnabled = TRUE;
753 /* since we support version 1, we can ignore version field and proceed
754 * as specified in version 1 standard [IEEE Std 802.1X-2001, 7.5.5] */
755 /* TODO: actually, we are not version 1 anymore.. However, Version 2
756 * does not change frame contents, so should be ok to process frames
757 * more or less identically. Some changes might be needed for
758 * verification of fields. */
761 case IEEE802_1X_TYPE_EAP_PACKET:
762 handle_eap(hapd, sta, (u8 *) (hdr + 1), datalen);
765 case IEEE802_1X_TYPE_EAPOL_START:
766 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
767 HOSTAPD_LEVEL_DEBUG, "received EAPOL-Start "
769 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
770 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
772 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
773 HOSTAPD_LEVEL_DEBUG, "cached PMKSA "
774 "available - ignore it since "
775 "STA sent EAPOL-Start");
776 wpa_auth_sta_clear_pmksa(sta->wpa_sm, pmksa);
778 sta->eapol_sm->eapolStart = TRUE;
779 sta->eapol_sm->dot1xAuthEapolStartFramesRx++;
780 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
783 case IEEE802_1X_TYPE_EAPOL_LOGOFF:
784 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
785 HOSTAPD_LEVEL_DEBUG, "received EAPOL-Logoff "
787 sta->acct_terminate_cause =
788 RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
789 accounting_sta_stop(hapd, sta);
790 sta->eapol_sm->eapolLogoff = TRUE;
791 sta->eapol_sm->dot1xAuthEapolLogoffFramesRx++;
794 case IEEE802_1X_TYPE_EAPOL_KEY:
795 wpa_printf(MSG_DEBUG, " EAPOL-Key");
796 if (!(sta->flags & WLAN_STA_AUTHORIZED)) {
797 wpa_printf(MSG_DEBUG, " Dropped key data from "
798 "unauthorized Supplicant");
803 case IEEE802_1X_TYPE_EAPOL_ENCAPSULATED_ASF_ALERT:
804 wpa_printf(MSG_DEBUG, " EAPOL-Encapsulated-ASF-Alert");
805 /* TODO: implement support for this; show data */
809 wpa_printf(MSG_DEBUG, " unknown IEEE 802.1X packet type");
810 sta->eapol_sm->dot1xAuthInvalidEapolFramesRx++;
814 eapol_auth_step(sta->eapol_sm);
819 * ieee802_1x_new_station - Start IEEE 802.1X authentication
820 * @hapd: hostapd BSS data
823 * This function is called to start IEEE 802.1X authentication when a new
824 * station completes IEEE 802.11 association.
826 void ieee802_1x_new_station(struct hostapd_data *hapd, struct sta_info *sta)
828 struct rsn_pmksa_cache_entry *pmksa;
833 if (hapd->conf->wps_state && hapd->conf->wpa &&
834 (sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) {
836 * Need to enable IEEE 802.1X/EAPOL state machines for possible
837 * WPS handshake even if IEEE 802.1X/EAPOL is not used for
838 * authentication in this BSS.
842 #endif /* CONFIG_WPS */
844 if ((!force_1x && !hapd->conf->ieee802_1x) ||
845 wpa_key_mgmt_wpa_psk(wpa_auth_sta_key_mgmt(sta->wpa_sm)))
848 if (sta->eapol_sm == NULL) {
849 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
850 HOSTAPD_LEVEL_DEBUG, "start authentication");
851 sta->eapol_sm = eapol_auth_alloc(hapd->eapol_auth, sta->addr,
852 sta->flags & WLAN_STA_PREAUTH,
854 if (sta->eapol_sm == NULL) {
855 hostapd_logger(hapd, sta->addr,
856 HOSTAPD_MODULE_IEEE8021X,
858 "failed to allocate state machine");
865 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
866 if (!hapd->conf->ieee802_1x && !(sta->flags & WLAN_STA_WPS)) {
868 * Delay EAPOL frame transmission until a possible WPS
869 * initiates the handshake with EAPOL-Start.
871 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
873 #endif /* CONFIG_WPS */
875 sta->eapol_sm->eap_if->portEnabled = TRUE;
877 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
881 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
883 "PMK from PMKSA cache - skip IEEE 802.1X/EAP");
884 /* Setup EAPOL state machines to already authenticated state
885 * because of existing PMKSA information in the cache. */
886 sta->eapol_sm->keyRun = TRUE;
887 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
888 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
889 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
890 sta->eapol_sm->authSuccess = TRUE;
891 if (sta->eapol_sm->eap)
892 eap_sm_notify_cached(sta->eapol_sm->eap);
893 old_vlanid = sta->vlan_id;
894 pmksa_cache_to_eapol_data(pmksa, sta->eapol_sm);
895 if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
897 ap_sta_bind_vlan(hapd, sta, old_vlanid);
901 * Force EAPOL state machines to start
902 * re-authentication without having to wait for the
903 * Supplicant to send EAPOL-Start.
905 sta->eapol_sm->reAuthenticate = TRUE;
907 eapol_auth_step(sta->eapol_sm);
912 void ieee802_1x_free_station(struct sta_info *sta)
914 struct eapol_state_machine *sm = sta->eapol_sm;
919 sta->eapol_sm = NULL;
921 #ifndef CONFIG_NO_RADIUS
922 if (sm->last_recv_radius) {
923 radius_msg_free(sm->last_recv_radius);
924 os_free(sm->last_recv_radius);
926 radius_free_class(&sm->radius_class);
927 #endif /* CONFIG_NO_RADIUS */
929 os_free(sm->identity);
934 #ifndef CONFIG_NO_RADIUS
935 static void ieee802_1x_decapsulate_radius(struct hostapd_data *hapd,
936 struct sta_info *sta)
943 struct radius_msg *msg;
944 struct eapol_state_machine *sm = sta->eapol_sm;
946 if (sm == NULL || sm->last_recv_radius == NULL) {
948 sm->eap_if->aaaEapNoReq = TRUE;
952 msg = sm->last_recv_radius;
954 eap = radius_msg_get_eap(msg, &len);
956 /* RFC 3579, Chap. 2.6.3:
957 * RADIUS server SHOULD NOT send Access-Reject/no EAP-Message
959 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
960 HOSTAPD_LEVEL_WARNING, "could not extract "
961 "EAP-Message from RADIUS message");
962 sm->eap_if->aaaEapNoReq = TRUE;
966 if (len < sizeof(*hdr)) {
967 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
968 HOSTAPD_LEVEL_WARNING, "too short EAP packet "
969 "received from authentication server");
971 sm->eap_if->aaaEapNoReq = TRUE;
975 if (len > sizeof(*hdr))
976 eap_type = eap[sizeof(*hdr)];
978 hdr = (struct eap_hdr *) eap;
980 case EAP_CODE_REQUEST:
982 sm->eap_type_authsrv = eap_type;
983 os_snprintf(buf, sizeof(buf), "EAP-Request-%s (%d)",
984 eap_type >= 0 ? eap_type_text(eap_type) : "??",
987 case EAP_CODE_RESPONSE:
988 os_snprintf(buf, sizeof(buf), "EAP Response-%s (%d)",
989 eap_type >= 0 ? eap_type_text(eap_type) : "??",
992 case EAP_CODE_SUCCESS:
993 os_strlcpy(buf, "EAP Success", sizeof(buf));
995 case EAP_CODE_FAILURE:
996 os_strlcpy(buf, "EAP Failure", sizeof(buf));
999 os_strlcpy(buf, "unknown EAP code", sizeof(buf));
1002 buf[sizeof(buf) - 1] = '\0';
1003 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1004 HOSTAPD_LEVEL_DEBUG, "decapsulated EAP packet (code=%d "
1005 "id=%d len=%d) from RADIUS server: %s",
1006 hdr->code, hdr->identifier, be_to_host16(hdr->length),
1008 sm->eap_if->aaaEapReq = TRUE;
1010 wpabuf_free(sm->eap_if->aaaEapReqData);
1011 sm->eap_if->aaaEapReqData = wpabuf_alloc_ext_data(eap, len);
1015 static void ieee802_1x_get_keys(struct hostapd_data *hapd,
1016 struct sta_info *sta, struct radius_msg *msg,
1017 struct radius_msg *req,
1018 const u8 *shared_secret,
1019 size_t shared_secret_len)
1021 struct radius_ms_mppe_keys *keys;
1022 struct eapol_state_machine *sm = sta->eapol_sm;
1026 keys = radius_msg_get_ms_keys(msg, req, shared_secret,
1029 if (keys && keys->send && keys->recv) {
1030 size_t len = keys->send_len + keys->recv_len;
1031 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Send-Key",
1032 keys->send, keys->send_len);
1033 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Recv-Key",
1034 keys->recv, keys->recv_len);
1036 os_free(sm->eap_if->aaaEapKeyData);
1037 sm->eap_if->aaaEapKeyData = os_malloc(len);
1038 if (sm->eap_if->aaaEapKeyData) {
1039 os_memcpy(sm->eap_if->aaaEapKeyData, keys->recv,
1041 os_memcpy(sm->eap_if->aaaEapKeyData + keys->recv_len,
1042 keys->send, keys->send_len);
1043 sm->eap_if->aaaEapKeyDataLen = len;
1044 sm->eap_if->aaaEapKeyAvailable = TRUE;
1049 os_free(keys->send);
1050 os_free(keys->recv);
1056 static void ieee802_1x_store_radius_class(struct hostapd_data *hapd,
1057 struct sta_info *sta,
1058 struct radius_msg *msg)
1062 struct eapol_state_machine *sm = sta->eapol_sm;
1064 struct radius_attr_data *nclass;
1065 size_t nclass_count;
1067 if (!hapd->conf->radius->acct_server || hapd->radius == NULL ||
1071 radius_free_class(&sm->radius_class);
1072 count = radius_msg_count_attr(msg, RADIUS_ATTR_CLASS, 1);
1076 nclass = os_zalloc(count * sizeof(struct radius_attr_data));
1083 for (i = 0; i < count; i++) {
1085 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CLASS,
1091 } while (class_len < 1);
1093 nclass[nclass_count].data = os_malloc(class_len);
1094 if (nclass[nclass_count].data == NULL)
1097 os_memcpy(nclass[nclass_count].data, class, class_len);
1098 nclass[nclass_count].len = class_len;
1102 sm->radius_class.attr = nclass;
1103 sm->radius_class.count = nclass_count;
1104 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Stored %lu RADIUS Class "
1105 "attributes for " MACSTR,
1106 (unsigned long) sm->radius_class.count,
1107 MAC2STR(sta->addr));
1111 /* Update sta->identity based on User-Name attribute in Access-Accept */
1112 static void ieee802_1x_update_sta_identity(struct hostapd_data *hapd,
1113 struct sta_info *sta,
1114 struct radius_msg *msg)
1118 struct eapol_state_machine *sm = sta->eapol_sm;
1123 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_USER_NAME, &buf, &len,
1127 identity = os_malloc(len + 1);
1128 if (identity == NULL)
1131 os_memcpy(identity, buf, len);
1132 identity[len] = '\0';
1134 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1135 HOSTAPD_LEVEL_DEBUG, "old identity '%s' updated with "
1136 "User-Name from Access-Accept '%s'",
1137 sm->identity ? (char *) sm->identity : "N/A",
1140 os_free(sm->identity);
1141 sm->identity = identity;
1142 sm->identity_len = len;
1146 struct sta_id_search {
1148 struct eapol_state_machine *sm;
1152 static int ieee802_1x_select_radius_identifier(struct hostapd_data *hapd,
1153 struct sta_info *sta,
1156 struct sta_id_search *id_search = ctx;
1157 struct eapol_state_machine *sm = sta->eapol_sm;
1159 if (sm && sm->radius_identifier >= 0 &&
1160 sm->radius_identifier == id_search->identifier) {
1168 static struct eapol_state_machine *
1169 ieee802_1x_search_radius_identifier(struct hostapd_data *hapd, u8 identifier)
1171 struct sta_id_search id_search;
1172 id_search.identifier = identifier;
1173 id_search.sm = NULL;
1174 ap_for_each_sta(hapd, ieee802_1x_select_radius_identifier, &id_search);
1175 return id_search.sm;
1180 * ieee802_1x_receive_auth - Process RADIUS frames from Authentication Server
1181 * @msg: RADIUS response message
1182 * @req: RADIUS request message
1183 * @shared_secret: RADIUS shared secret
1184 * @shared_secret_len: Length of shared_secret in octets
1185 * @data: Context data (struct hostapd_data *)
1186 * Returns: Processing status
1188 static RadiusRxResult
1189 ieee802_1x_receive_auth(struct radius_msg *msg, struct radius_msg *req,
1190 const u8 *shared_secret, size_t shared_secret_len,
1193 struct hostapd_data *hapd = data;
1194 struct sta_info *sta;
1195 u32 session_timeout = 0, termination_action, acct_interim_interval;
1196 int session_timeout_set, old_vlanid = 0;
1197 struct eapol_state_machine *sm;
1198 int override_eapReq = 0;
1200 sm = ieee802_1x_search_radius_identifier(hapd, msg->hdr->identifier);
1202 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Could not find matching "
1203 "station for this RADIUS message");
1204 return RADIUS_RX_UNKNOWN;
1208 /* RFC 2869, Ch. 5.13: valid Message-Authenticator attribute MUST be
1209 * present when packet contains an EAP-Message attribute */
1210 if (msg->hdr->code == RADIUS_CODE_ACCESS_REJECT &&
1211 radius_msg_get_attr(msg, RADIUS_ATTR_MESSAGE_AUTHENTICATOR, NULL,
1213 radius_msg_get_attr(msg, RADIUS_ATTR_EAP_MESSAGE, NULL, 0) < 0) {
1214 wpa_printf(MSG_DEBUG, "Allowing RADIUS Access-Reject without "
1215 "Message-Authenticator since it does not include "
1217 } else if (radius_msg_verify(msg, shared_secret, shared_secret_len,
1219 printf("Incoming RADIUS packet did not have correct "
1220 "Message-Authenticator - dropped\n");
1221 return RADIUS_RX_INVALID_AUTHENTICATOR;
1224 if (msg->hdr->code != RADIUS_CODE_ACCESS_ACCEPT &&
1225 msg->hdr->code != RADIUS_CODE_ACCESS_REJECT &&
1226 msg->hdr->code != RADIUS_CODE_ACCESS_CHALLENGE) {
1227 printf("Unknown RADIUS message code\n");
1228 return RADIUS_RX_UNKNOWN;
1231 sm->radius_identifier = -1;
1232 wpa_printf(MSG_DEBUG, "RADIUS packet matching with station " MACSTR,
1233 MAC2STR(sta->addr));
1235 if (sm->last_recv_radius) {
1236 radius_msg_free(sm->last_recv_radius);
1237 os_free(sm->last_recv_radius);
1240 sm->last_recv_radius = msg;
1242 session_timeout_set =
1243 !radius_msg_get_attr_int32(msg, RADIUS_ATTR_SESSION_TIMEOUT,
1245 if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_TERMINATION_ACTION,
1246 &termination_action))
1247 termination_action = RADIUS_TERMINATION_ACTION_DEFAULT;
1249 if (hapd->conf->radius->acct_interim_interval == 0 &&
1250 msg->hdr->code == RADIUS_CODE_ACCESS_ACCEPT &&
1251 radius_msg_get_attr_int32(msg, RADIUS_ATTR_ACCT_INTERIM_INTERVAL,
1252 &acct_interim_interval) == 0) {
1253 if (acct_interim_interval < 60) {
1254 hostapd_logger(hapd, sta->addr,
1255 HOSTAPD_MODULE_IEEE8021X,
1257 "ignored too small "
1258 "Acct-Interim-Interval %d",
1259 acct_interim_interval);
1261 sta->acct_interim_interval = acct_interim_interval;
1265 switch (msg->hdr->code) {
1266 case RADIUS_CODE_ACCESS_ACCEPT:
1267 if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
1269 #ifndef CONFIG_NO_VLAN
1271 old_vlanid = sta->vlan_id;
1272 sta->vlan_id = radius_msg_get_vlanid(msg);
1274 if (sta->vlan_id > 0 &&
1275 hostapd_get_vlan_id_ifname(hapd->conf->vlan,
1277 hostapd_logger(hapd, sta->addr,
1278 HOSTAPD_MODULE_RADIUS,
1280 "VLAN ID %d", sta->vlan_id);
1281 } else if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_REQUIRED) {
1282 sta->eapol_sm->authFail = TRUE;
1283 hostapd_logger(hapd, sta->addr,
1284 HOSTAPD_MODULE_IEEE8021X,
1285 HOSTAPD_LEVEL_INFO, "authentication "
1286 "server did not include required VLAN "
1287 "ID in Access-Accept");
1290 #endif /* CONFIG_NO_VLAN */
1292 ap_sta_bind_vlan(hapd, sta, old_vlanid);
1294 /* RFC 3580, Ch. 3.17 */
1295 if (session_timeout_set && termination_action ==
1296 RADIUS_TERMINATION_ACTION_RADIUS_REQUEST) {
1297 sm->reAuthPeriod = session_timeout;
1298 } else if (session_timeout_set)
1299 ap_sta_session_timeout(hapd, sta, session_timeout);
1301 sm->eap_if->aaaSuccess = TRUE;
1302 override_eapReq = 1;
1303 ieee802_1x_get_keys(hapd, sta, msg, req, shared_secret,
1305 ieee802_1x_store_radius_class(hapd, sta, msg);
1306 ieee802_1x_update_sta_identity(hapd, sta, msg);
1307 if (sm->eap_if->eapKeyAvailable &&
1308 wpa_auth_pmksa_add(sta->wpa_sm, sm->eapol_key_crypt,
1309 session_timeout_set ?
1310 (int) session_timeout : -1, sm) == 0) {
1311 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
1312 HOSTAPD_LEVEL_DEBUG,
1313 "Added PMKSA cache entry");
1316 case RADIUS_CODE_ACCESS_REJECT:
1317 sm->eap_if->aaaFail = TRUE;
1318 override_eapReq = 1;
1320 case RADIUS_CODE_ACCESS_CHALLENGE:
1321 sm->eap_if->aaaEapReq = TRUE;
1322 if (session_timeout_set) {
1323 /* RFC 2869, Ch. 2.3.2; RFC 3580, Ch. 3.17 */
1324 sm->eap_if->aaaMethodTimeout = session_timeout;
1325 hostapd_logger(hapd, sm->addr,
1326 HOSTAPD_MODULE_IEEE8021X,
1327 HOSTAPD_LEVEL_DEBUG,
1328 "using EAP timeout of %d seconds (from "
1330 sm->eap_if->aaaMethodTimeout);
1333 * Use dynamic retransmission behavior per EAP
1336 sm->eap_if->aaaMethodTimeout = 0;
1341 ieee802_1x_decapsulate_radius(hapd, sta);
1342 if (override_eapReq)
1343 sm->eap_if->aaaEapReq = FALSE;
1345 eapol_auth_step(sm);
1347 return RADIUS_RX_QUEUED;
1349 #endif /* CONFIG_NO_RADIUS */
1352 void ieee802_1x_abort_auth(struct hostapd_data *hapd, struct sta_info *sta)
1354 struct eapol_state_machine *sm = sta->eapol_sm;
1358 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1359 HOSTAPD_LEVEL_DEBUG, "aborting authentication");
1361 #ifndef CONFIG_NO_RADIUS
1362 if (sm->last_recv_radius) {
1363 radius_msg_free(sm->last_recv_radius);
1364 os_free(sm->last_recv_radius);
1365 sm->last_recv_radius = NULL;
1367 #endif /* CONFIG_NO_RADIUS */
1369 if (sm->eap_if->eapTimeout) {
1371 * Disconnect the STA since it did not reply to the last EAP
1372 * request and we cannot continue EAP processing (EAP-Failure
1373 * could only be sent if the EAP peer actually replied).
1375 sm->eap_if->portEnabled = FALSE;
1376 hostapd_sta_deauth(hapd, sta->addr,
1377 WLAN_REASON_PREV_AUTH_NOT_VALID);
1378 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC |
1379 WLAN_STA_AUTHORIZED);
1380 eloop_cancel_timeout(ap_handle_timer, hapd, sta);
1381 eloop_register_timeout(0, 0, ap_handle_timer, hapd, sta);
1382 sta->timeout_next = STA_REMOVE;
1387 #ifdef HOSTAPD_DUMP_STATE
1388 static void fprint_char(FILE *f, char c)
1390 if (c >= 32 && c < 127)
1391 fprintf(f, "%c", c);
1393 fprintf(f, "<%02x>", c);
1397 void ieee802_1x_dump_state(FILE *f, const char *prefix, struct sta_info *sta)
1399 struct eapol_state_machine *sm = sta->eapol_sm;
1403 fprintf(f, "%sIEEE 802.1X:\n", prefix);
1407 fprintf(f, "%sidentity=", prefix);
1408 for (i = 0; i < sm->identity_len; i++)
1409 fprint_char(f, sm->identity[i]);
1413 fprintf(f, "%slast EAP type: Authentication Server: %d (%s) "
1414 "Supplicant: %d (%s)\n", prefix,
1415 sm->eap_type_authsrv, eap_type_text(sm->eap_type_authsrv),
1416 sm->eap_type_supp, eap_type_text(sm->eap_type_supp));
1418 fprintf(f, "%scached_packets=%s\n", prefix,
1419 sm->last_recv_radius ? "[RX RADIUS]" : "");
1421 eapol_auth_dump_state(f, prefix, sm);
1423 #endif /* HOSTAPD_DUMP_STATE */
1426 static int ieee802_1x_rekey_broadcast(struct hostapd_data *hapd)
1428 if (hapd->conf->default_wep_key_len < 1)
1431 os_free(hapd->default_wep_key);
1432 hapd->default_wep_key = os_malloc(hapd->conf->default_wep_key_len);
1433 if (hapd->default_wep_key == NULL ||
1434 os_get_random(hapd->default_wep_key,
1435 hapd->conf->default_wep_key_len)) {
1436 printf("Could not generate random WEP key.\n");
1437 os_free(hapd->default_wep_key);
1438 hapd->default_wep_key = NULL;
1442 wpa_hexdump_key(MSG_DEBUG, "IEEE 802.1X: New default WEP key",
1443 hapd->default_wep_key,
1444 hapd->conf->default_wep_key_len);
1450 static int ieee802_1x_sta_key_available(struct hostapd_data *hapd,
1451 struct sta_info *sta, void *ctx)
1453 if (sta->eapol_sm) {
1454 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
1455 eapol_auth_step(sta->eapol_sm);
1461 static void ieee802_1x_rekey(void *eloop_ctx, void *timeout_ctx)
1463 struct hostapd_data *hapd = eloop_ctx;
1465 if (hapd->default_wep_key_idx >= 3)
1466 hapd->default_wep_key_idx =
1467 hapd->conf->individual_wep_key_len > 0 ? 1 : 0;
1469 hapd->default_wep_key_idx++;
1471 wpa_printf(MSG_DEBUG, "IEEE 802.1X: New default WEP key index %d",
1472 hapd->default_wep_key_idx);
1474 if (ieee802_1x_rekey_broadcast(hapd)) {
1475 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1476 HOSTAPD_LEVEL_WARNING, "failed to generate a "
1477 "new broadcast key");
1478 os_free(hapd->default_wep_key);
1479 hapd->default_wep_key = NULL;
1483 /* TODO: Could setup key for RX here, but change default TX keyid only
1484 * after new broadcast key has been sent to all stations. */
1485 if (hostapd_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP, NULL,
1486 hapd->default_wep_key_idx, 1, NULL, 0,
1487 hapd->default_wep_key,
1488 hapd->conf->default_wep_key_len)) {
1489 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1490 HOSTAPD_LEVEL_WARNING, "failed to configure a "
1491 "new broadcast key");
1492 os_free(hapd->default_wep_key);
1493 hapd->default_wep_key = NULL;
1497 ap_for_each_sta(hapd, ieee802_1x_sta_key_available, NULL);
1499 if (hapd->conf->wep_rekeying_period > 0) {
1500 eloop_register_timeout(hapd->conf->wep_rekeying_period, 0,
1501 ieee802_1x_rekey, hapd, NULL);
1506 static void ieee802_1x_eapol_send(void *ctx, void *sta_ctx, u8 type,
1507 const u8 *data, size_t datalen)
1509 ieee802_1x_send(ctx, sta_ctx, type, data, datalen);
1513 static void ieee802_1x_aaa_send(void *ctx, void *sta_ctx,
1514 const u8 *data, size_t datalen)
1516 #ifndef CONFIG_NO_RADIUS
1517 struct hostapd_data *hapd = ctx;
1518 struct sta_info *sta = sta_ctx;
1520 ieee802_1x_encapsulate_radius(hapd, sta, data, datalen);
1521 #endif /* CONFIG_NO_RADIUS */
1525 static void _ieee802_1x_finished(void *ctx, void *sta_ctx, int success,
1528 struct hostapd_data *hapd = ctx;
1529 struct sta_info *sta = sta_ctx;
1531 rsn_preauth_finished(hapd, sta, success);
1533 ieee802_1x_finished(hapd, sta, success);
1537 static int ieee802_1x_get_eap_user(void *ctx, const u8 *identity,
1538 size_t identity_len, int phase2,
1539 struct eap_user *user)
1541 struct hostapd_data *hapd = ctx;
1542 const struct hostapd_eap_user *eap_user;
1545 eap_user = hostapd_get_eap_user(hapd->conf, identity,
1546 identity_len, phase2);
1547 if (eap_user == NULL)
1550 os_memset(user, 0, sizeof(*user));
1551 user->phase2 = phase2;
1552 count = EAP_USER_MAX_METHODS;
1553 if (count > EAP_MAX_METHODS)
1554 count = EAP_MAX_METHODS;
1555 for (i = 0; i < count; i++) {
1556 user->methods[i].vendor = eap_user->methods[i].vendor;
1557 user->methods[i].method = eap_user->methods[i].method;
1560 if (eap_user->password) {
1561 user->password = os_malloc(eap_user->password_len);
1562 if (user->password == NULL)
1564 os_memcpy(user->password, eap_user->password,
1565 eap_user->password_len);
1566 user->password_len = eap_user->password_len;
1568 user->force_version = eap_user->force_version;
1569 user->ttls_auth = eap_user->ttls_auth;
1575 static int ieee802_1x_sta_entry_alive(void *ctx, const u8 *addr)
1577 struct hostapd_data *hapd = ctx;
1578 struct sta_info *sta;
1579 sta = ap_get_sta(hapd, addr);
1580 if (sta == NULL || sta->eapol_sm == NULL)
1586 static void ieee802_1x_logger(void *ctx, const u8 *addr,
1587 eapol_logger_level level, const char *txt)
1589 #ifndef CONFIG_NO_HOSTAPD_LOGGER
1590 struct hostapd_data *hapd = ctx;
1594 case EAPOL_LOGGER_WARNING:
1595 hlevel = HOSTAPD_LEVEL_WARNING;
1597 case EAPOL_LOGGER_INFO:
1598 hlevel = HOSTAPD_LEVEL_INFO;
1600 case EAPOL_LOGGER_DEBUG:
1602 hlevel = HOSTAPD_LEVEL_DEBUG;
1606 hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE8021X, hlevel, "%s",
1608 #endif /* CONFIG_NO_HOSTAPD_LOGGER */
1612 static void ieee802_1x_set_port_authorized(void *ctx, void *sta_ctx,
1615 struct hostapd_data *hapd = ctx;
1616 struct sta_info *sta = sta_ctx;
1617 ieee802_1x_set_sta_authorized(hapd, sta, authorized);
1621 static void _ieee802_1x_abort_auth(void *ctx, void *sta_ctx)
1623 struct hostapd_data *hapd = ctx;
1624 struct sta_info *sta = sta_ctx;
1625 ieee802_1x_abort_auth(hapd, sta);
1629 static void _ieee802_1x_tx_key(void *ctx, void *sta_ctx)
1631 struct hostapd_data *hapd = ctx;
1632 struct sta_info *sta = sta_ctx;
1633 ieee802_1x_tx_key(hapd, sta);
1637 int ieee802_1x_init(struct hostapd_data *hapd)
1640 struct eapol_auth_config conf;
1641 struct eapol_auth_cb cb;
1643 os_memset(&conf, 0, sizeof(conf));
1645 conf.eap_reauth_period = hapd->conf->eap_reauth_period;
1646 conf.wpa = hapd->conf->wpa;
1647 conf.individual_wep_key_len = hapd->conf->individual_wep_key_len;
1648 conf.eap_server = hapd->conf->eap_server;
1649 conf.ssl_ctx = hapd->ssl_ctx;
1650 conf.eap_sim_db_priv = hapd->eap_sim_db_priv;
1651 conf.eap_req_id_text = hapd->conf->eap_req_id_text;
1652 conf.eap_req_id_text_len = hapd->conf->eap_req_id_text_len;
1653 conf.pac_opaque_encr_key = hapd->conf->pac_opaque_encr_key;
1654 conf.eap_fast_a_id = hapd->conf->eap_fast_a_id;
1655 conf.eap_fast_a_id_len = hapd->conf->eap_fast_a_id_len;
1656 conf.eap_fast_a_id_info = hapd->conf->eap_fast_a_id_info;
1657 conf.eap_fast_prov = hapd->conf->eap_fast_prov;
1658 conf.pac_key_lifetime = hapd->conf->pac_key_lifetime;
1659 conf.pac_key_refresh_time = hapd->conf->pac_key_refresh_time;
1660 conf.eap_sim_aka_result_ind = hapd->conf->eap_sim_aka_result_ind;
1661 conf.tnc = hapd->conf->tnc;
1662 conf.wps = hapd->wps;
1664 os_memset(&cb, 0, sizeof(cb));
1665 cb.eapol_send = ieee802_1x_eapol_send;
1666 cb.aaa_send = ieee802_1x_aaa_send;
1667 cb.finished = _ieee802_1x_finished;
1668 cb.get_eap_user = ieee802_1x_get_eap_user;
1669 cb.sta_entry_alive = ieee802_1x_sta_entry_alive;
1670 cb.logger = ieee802_1x_logger;
1671 cb.set_port_authorized = ieee802_1x_set_port_authorized;
1672 cb.abort_auth = _ieee802_1x_abort_auth;
1673 cb.tx_key = _ieee802_1x_tx_key;
1675 hapd->eapol_auth = eapol_auth_init(&conf, &cb);
1676 if (hapd->eapol_auth == NULL)
1679 if ((hapd->conf->ieee802_1x || hapd->conf->wpa) &&
1680 hostapd_set_ieee8021x(hapd->conf->iface, hapd, 1))
1683 #ifndef CONFIG_NO_RADIUS
1684 if (radius_client_register(hapd->radius, RADIUS_AUTH,
1685 ieee802_1x_receive_auth, hapd))
1687 #endif /* CONFIG_NO_RADIUS */
1689 if (hapd->conf->default_wep_key_len) {
1690 hostapd_set_privacy(hapd, 1);
1692 for (i = 0; i < 4; i++)
1693 hostapd_set_key(hapd->conf->iface, hapd, WPA_ALG_NONE,
1694 NULL, i, 0, NULL, 0, NULL, 0);
1696 ieee802_1x_rekey(hapd, NULL);
1698 if (hapd->default_wep_key == NULL)
1706 void ieee802_1x_deinit(struct hostapd_data *hapd)
1708 eloop_cancel_timeout(ieee802_1x_rekey, hapd, NULL);
1710 if (hapd->driver != NULL &&
1711 (hapd->conf->ieee802_1x || hapd->conf->wpa))
1712 hostapd_set_ieee8021x(hapd->conf->iface, hapd, 0);
1714 eapol_auth_deinit(hapd->eapol_auth);
1715 hapd->eapol_auth = NULL;
1719 int ieee802_1x_reconfig(struct hostapd_data *hapd,
1720 struct hostapd_config *oldconf,
1721 struct hostapd_bss_config *oldbss)
1723 ieee802_1x_deinit(hapd);
1724 return ieee802_1x_init(hapd);
1728 int ieee802_1x_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
1729 const u8 *buf, size_t len, int ack)
1731 struct ieee80211_hdr *hdr;
1732 struct ieee802_1x_hdr *xhdr;
1733 struct ieee802_1x_eapol_key *key;
1735 const unsigned char rfc1042_hdr[ETH_ALEN] =
1736 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
1740 if (len < sizeof(*hdr) + sizeof(rfc1042_hdr) + 2 + sizeof(*xhdr))
1743 hdr = (struct ieee80211_hdr *) buf;
1744 pos = (u8 *) (hdr + 1);
1745 if (os_memcmp(pos, rfc1042_hdr, sizeof(rfc1042_hdr)) != 0)
1747 pos += sizeof(rfc1042_hdr);
1748 if (WPA_GET_BE16(pos) != ETH_P_PAE)
1752 xhdr = (struct ieee802_1x_hdr *) pos;
1753 pos += sizeof(*xhdr);
1755 wpa_printf(MSG_DEBUG, "IEEE 802.1X: " MACSTR " TX status - version=%d "
1756 "type=%d length=%d - ack=%d",
1757 MAC2STR(sta->addr), xhdr->version, xhdr->type,
1758 be_to_host16(xhdr->length), ack);
1760 /* EAPOL EAP-Packet packets are eventually re-sent by either Supplicant
1761 * or Authenticator state machines, but EAPOL-Key packets are not
1762 * retransmitted in case of failure. Try to re-sent failed EAPOL-Key
1763 * packets couple of times because otherwise STA keys become
1764 * unsynchronized with AP. */
1765 if (xhdr->type == IEEE802_1X_TYPE_EAPOL_KEY && !ack &&
1766 pos + sizeof(*key) <= buf + len) {
1767 key = (struct ieee802_1x_eapol_key *) pos;
1768 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1769 HOSTAPD_LEVEL_DEBUG, "did not Ack EAPOL-Key "
1770 "frame (%scast index=%d)",
1771 key->key_index & BIT(7) ? "uni" : "broad",
1772 key->key_index & ~BIT(7));
1773 /* TODO: re-send EAPOL-Key couple of times (with short delay
1774 * between them?). If all attempt fail, report error and
1775 * deauthenticate STA so that it will get new keys when
1776 * authenticating again (e.g., after returning in range).
1777 * Separate limit/transmit state needed both for unicast and
1778 * broadcast keys(?) */
1780 /* TODO: could move unicast key configuration from ieee802_1x_tx_key()
1781 * to here and change the key only if the EAPOL-Key packet was Acked.
1788 u8 * ieee802_1x_get_identity(struct eapol_state_machine *sm, size_t *len)
1790 if (sm == NULL || sm->identity == NULL)
1793 *len = sm->identity_len;
1794 return sm->identity;
1798 u8 * ieee802_1x_get_radius_class(struct eapol_state_machine *sm, size_t *len,
1801 if (sm == NULL || sm->radius_class.attr == NULL ||
1802 idx >= (int) sm->radius_class.count)
1805 *len = sm->radius_class.attr[idx].len;
1806 return sm->radius_class.attr[idx].data;
1810 const u8 * ieee802_1x_get_key(struct eapol_state_machine *sm, size_t *len)
1815 *len = sm->eap_if->eapKeyDataLen;
1816 return sm->eap_if->eapKeyData;
1820 void ieee802_1x_notify_port_enabled(struct eapol_state_machine *sm,
1825 sm->eap_if->portEnabled = enabled ? TRUE : FALSE;
1826 eapol_auth_step(sm);
1830 void ieee802_1x_notify_port_valid(struct eapol_state_machine *sm,
1835 sm->portValid = valid ? TRUE : FALSE;
1836 eapol_auth_step(sm);
1840 void ieee802_1x_notify_pre_auth(struct eapol_state_machine *sm, int pre_auth)
1845 sm->flags |= EAPOL_SM_PREAUTH;
1847 sm->flags &= ~EAPOL_SM_PREAUTH;
1851 static const char * bool_txt(Boolean bool)
1853 return bool ? "TRUE" : "FALSE";
1857 int ieee802_1x_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
1864 int ieee802_1x_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
1865 char *buf, size_t buflen)
1868 struct eapol_state_machine *sm = sta->eapol_sm;
1873 ret = os_snprintf(buf + len, buflen - len,
1874 "dot1xPaePortNumber=%d\n"
1875 "dot1xPaePortProtocolVersion=%d\n"
1876 "dot1xPaePortCapabilities=1\n"
1877 "dot1xPaePortInitialize=%d\n"
1878 "dot1xPaePortReauthenticate=FALSE\n",
1882 if (ret < 0 || (size_t) ret >= buflen - len)
1886 /* dot1xAuthConfigTable */
1887 ret = os_snprintf(buf + len, buflen - len,
1888 "dot1xAuthPaeState=%d\n"
1889 "dot1xAuthBackendAuthState=%d\n"
1890 "dot1xAuthAdminControlledDirections=%d\n"
1891 "dot1xAuthOperControlledDirections=%d\n"
1892 "dot1xAuthAuthControlledPortStatus=%d\n"
1893 "dot1xAuthAuthControlledPortControl=%d\n"
1894 "dot1xAuthQuietPeriod=%u\n"
1895 "dot1xAuthServerTimeout=%u\n"
1896 "dot1xAuthReAuthPeriod=%u\n"
1897 "dot1xAuthReAuthEnabled=%s\n"
1898 "dot1xAuthKeyTxEnabled=%s\n",
1899 sm->auth_pae_state + 1,
1900 sm->be_auth_state + 1,
1901 sm->adminControlledDirections,
1902 sm->operControlledDirections,
1908 bool_txt(sm->reAuthEnabled),
1909 bool_txt(sm->keyTxEnabled));
1910 if (ret < 0 || (size_t) ret >= buflen - len)
1914 /* dot1xAuthStatsTable */
1915 ret = os_snprintf(buf + len, buflen - len,
1916 "dot1xAuthEapolFramesRx=%u\n"
1917 "dot1xAuthEapolFramesTx=%u\n"
1918 "dot1xAuthEapolStartFramesRx=%u\n"
1919 "dot1xAuthEapolLogoffFramesRx=%u\n"
1920 "dot1xAuthEapolRespIdFramesRx=%u\n"
1921 "dot1xAuthEapolRespFramesRx=%u\n"
1922 "dot1xAuthEapolReqIdFramesTx=%u\n"
1923 "dot1xAuthEapolReqFramesTx=%u\n"
1924 "dot1xAuthInvalidEapolFramesRx=%u\n"
1925 "dot1xAuthEapLengthErrorFramesRx=%u\n"
1926 "dot1xAuthLastEapolFrameVersion=%u\n"
1927 "dot1xAuthLastEapolFrameSource=" MACSTR "\n",
1928 sm->dot1xAuthEapolFramesRx,
1929 sm->dot1xAuthEapolFramesTx,
1930 sm->dot1xAuthEapolStartFramesRx,
1931 sm->dot1xAuthEapolLogoffFramesRx,
1932 sm->dot1xAuthEapolRespIdFramesRx,
1933 sm->dot1xAuthEapolRespFramesRx,
1934 sm->dot1xAuthEapolReqIdFramesTx,
1935 sm->dot1xAuthEapolReqFramesTx,
1936 sm->dot1xAuthInvalidEapolFramesRx,
1937 sm->dot1xAuthEapLengthErrorFramesRx,
1938 sm->dot1xAuthLastEapolFrameVersion,
1940 if (ret < 0 || (size_t) ret >= buflen - len)
1944 /* dot1xAuthDiagTable */
1945 ret = os_snprintf(buf + len, buflen - len,
1946 "dot1xAuthEntersConnecting=%u\n"
1947 "dot1xAuthEapLogoffsWhileConnecting=%u\n"
1948 "dot1xAuthEntersAuthenticating=%u\n"
1949 "dot1xAuthAuthSuccessesWhileAuthenticating=%u\n"
1950 "dot1xAuthAuthTimeoutsWhileAuthenticating=%u\n"
1951 "dot1xAuthAuthFailWhileAuthenticating=%u\n"
1952 "dot1xAuthAuthEapStartsWhileAuthenticating=%u\n"
1953 "dot1xAuthAuthEapLogoffWhileAuthenticating=%u\n"
1954 "dot1xAuthAuthReauthsWhileAuthenticated=%u\n"
1955 "dot1xAuthAuthEapStartsWhileAuthenticated=%u\n"
1956 "dot1xAuthAuthEapLogoffWhileAuthenticated=%u\n"
1957 "dot1xAuthBackendResponses=%u\n"
1958 "dot1xAuthBackendAccessChallenges=%u\n"
1959 "dot1xAuthBackendOtherRequestsToSupplicant=%u\n"
1960 "dot1xAuthBackendAuthSuccesses=%u\n"
1961 "dot1xAuthBackendAuthFails=%u\n",
1962 sm->authEntersConnecting,
1963 sm->authEapLogoffsWhileConnecting,
1964 sm->authEntersAuthenticating,
1965 sm->authAuthSuccessesWhileAuthenticating,
1966 sm->authAuthTimeoutsWhileAuthenticating,
1967 sm->authAuthFailWhileAuthenticating,
1968 sm->authAuthEapStartsWhileAuthenticating,
1969 sm->authAuthEapLogoffWhileAuthenticating,
1970 sm->authAuthReauthsWhileAuthenticated,
1971 sm->authAuthEapStartsWhileAuthenticated,
1972 sm->authAuthEapLogoffWhileAuthenticated,
1973 sm->backendResponses,
1974 sm->backendAccessChallenges,
1975 sm->backendOtherRequestsToSupplicant,
1976 sm->backendAuthSuccesses,
1977 sm->backendAuthFails);
1978 if (ret < 0 || (size_t) ret >= buflen - len)
1982 /* dot1xAuthSessionStatsTable */
1983 ret = os_snprintf(buf + len, buflen - len,
1984 /* TODO: dot1xAuthSessionOctetsRx */
1985 /* TODO: dot1xAuthSessionOctetsTx */
1986 /* TODO: dot1xAuthSessionFramesRx */
1987 /* TODO: dot1xAuthSessionFramesTx */
1988 "dot1xAuthSessionId=%08X-%08X\n"
1989 "dot1xAuthSessionAuthenticMethod=%d\n"
1990 "dot1xAuthSessionTime=%u\n"
1991 "dot1xAuthSessionTerminateCause=999\n"
1992 "dot1xAuthSessionUserName=%s\n",
1993 sta->acct_session_id_hi, sta->acct_session_id_lo,
1994 (wpa_key_mgmt_wpa_ieee8021x(
1995 wpa_auth_sta_key_mgmt(sta->wpa_sm))) ?
1997 (unsigned int) (time(NULL) -
1998 sta->acct_session_start),
2000 if (ret < 0 || (size_t) ret >= buflen - len)
2008 static void ieee802_1x_finished(struct hostapd_data *hapd,
2009 struct sta_info *sta, int success)
2013 /* TODO: get PMKLifetime from WPA parameters */
2014 static const int dot11RSNAConfigPMKLifetime = 43200;
2016 key = ieee802_1x_get_key(sta->eapol_sm, &len);
2017 if (success && key && len >= PMK_LEN &&
2018 wpa_auth_pmksa_add(sta->wpa_sm, key, dot11RSNAConfigPMKLifetime,
2019 sta->eapol_sm) == 0) {
2020 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
2021 HOSTAPD_LEVEL_DEBUG,
2022 "Added PMKSA cache entry (IEEE 802.1X)");