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_encryption(ifname, hapd, "WEP", NULL, key->idx,
224 key->key[key->idx], key->len[key->idx], 1))
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_encryption(hapd->conf->iface, hapd, "WEP",
340 hapd->conf->individual_wep_key_len,
342 wpa_printf(MSG_ERROR, "Could not set individual WEP "
351 const char *radius_mode_txt(struct hostapd_data *hapd)
353 if (hapd->iface->current_mode == NULL)
356 switch (hapd->iface->current_mode->mode) {
357 case HOSTAPD_MODE_IEEE80211A:
359 case HOSTAPD_MODE_IEEE80211G:
361 case HOSTAPD_MODE_IEEE80211B:
368 int radius_sta_rate(struct hostapd_data *hapd, struct sta_info *sta)
373 for (i = 0; i < sta->supported_rates_len; i++)
374 if ((sta->supported_rates[i] & 0x7f) > rate)
375 rate = sta->supported_rates[i] & 0x7f;
381 #ifndef CONFIG_NO_RADIUS
382 static void ieee802_1x_learn_identity(struct hostapd_data *hapd,
383 struct eapol_state_machine *sm,
384 const u8 *eap, size_t len)
389 if (len <= sizeof(struct eap_hdr) ||
390 eap[sizeof(struct eap_hdr)] != EAP_TYPE_IDENTITY)
393 identity = eap_get_identity(sm->eap, &identity_len);
394 if (identity == NULL)
397 /* Save station identity for future RADIUS packets */
398 os_free(sm->identity);
399 sm->identity = os_malloc(identity_len + 1);
400 if (sm->identity == NULL) {
401 sm->identity_len = 0;
405 os_memcpy(sm->identity, identity, identity_len);
406 sm->identity_len = identity_len;
407 sm->identity[identity_len] = '\0';
408 hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
409 HOSTAPD_LEVEL_DEBUG, "STA identity '%s'", sm->identity);
410 sm->dot1xAuthEapolRespIdFramesRx++;
414 static void ieee802_1x_encapsulate_radius(struct hostapd_data *hapd,
415 struct sta_info *sta,
416 const u8 *eap, size_t len)
418 struct radius_msg *msg;
420 struct eapol_state_machine *sm = sta->eapol_sm;
425 ieee802_1x_learn_identity(hapd, sm, eap, len);
427 wpa_printf(MSG_DEBUG, "Encapsulating EAP message into a RADIUS "
430 sm->radius_identifier = radius_client_get_id(hapd->radius);
431 msg = radius_msg_new(RADIUS_CODE_ACCESS_REQUEST,
432 sm->radius_identifier);
434 printf("Could not create net RADIUS packet\n");
438 radius_msg_make_authenticator(msg, (u8 *) sta, sizeof(*sta));
441 !radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME,
442 sm->identity, sm->identity_len)) {
443 printf("Could not add User-Name\n");
447 if (hapd->conf->own_ip_addr.af == AF_INET &&
448 !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS,
449 (u8 *) &hapd->conf->own_ip_addr.u.v4, 4)) {
450 printf("Could not add NAS-IP-Address\n");
455 if (hapd->conf->own_ip_addr.af == AF_INET6 &&
456 !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IPV6_ADDRESS,
457 (u8 *) &hapd->conf->own_ip_addr.u.v6, 16)) {
458 printf("Could not add NAS-IPv6-Address\n");
461 #endif /* CONFIG_IPV6 */
463 if (hapd->conf->nas_identifier &&
464 !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IDENTIFIER,
465 (u8 *) hapd->conf->nas_identifier,
466 os_strlen(hapd->conf->nas_identifier))) {
467 printf("Could not add NAS-Identifier\n");
471 if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT, sta->aid)) {
472 printf("Could not add NAS-Port\n");
476 os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT ":%s",
477 MAC2STR(hapd->own_addr), hapd->conf->ssid.ssid);
478 buf[sizeof(buf) - 1] = '\0';
479 if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLED_STATION_ID,
480 (u8 *) buf, os_strlen(buf))) {
481 printf("Could not add Called-Station-Id\n");
485 os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
487 buf[sizeof(buf) - 1] = '\0';
488 if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID,
489 (u8 *) buf, os_strlen(buf))) {
490 printf("Could not add Calling-Station-Id\n");
494 /* TODO: should probably check MTU from driver config; 2304 is max for
495 * IEEE 802.11, but use 1400 to avoid problems with too large packets
497 if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_FRAMED_MTU, 1400)) {
498 printf("Could not add Framed-MTU\n");
502 if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT_TYPE,
503 RADIUS_NAS_PORT_TYPE_IEEE_802_11)) {
504 printf("Could not add NAS-Port-Type\n");
508 if (sta->flags & WLAN_STA_PREAUTH) {
509 os_strlcpy(buf, "IEEE 802.11i Pre-Authentication",
512 os_snprintf(buf, sizeof(buf), "CONNECT %d%sMbps %s",
513 radius_sta_rate(hapd, sta) / 2,
514 (radius_sta_rate(hapd, sta) & 1) ? ".5" : "",
515 radius_mode_txt(hapd));
516 buf[sizeof(buf) - 1] = '\0';
518 if (!radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO,
519 (u8 *) buf, os_strlen(buf))) {
520 printf("Could not add Connect-Info\n");
524 if (eap && !radius_msg_add_eap(msg, eap, len)) {
525 printf("Could not add EAP-Message\n");
529 /* State attribute must be copied if and only if this packet is
530 * Access-Request reply to the previous Access-Challenge */
531 if (sm->last_recv_radius && sm->last_recv_radius->hdr->code ==
532 RADIUS_CODE_ACCESS_CHALLENGE) {
533 int res = radius_msg_copy_attr(msg, sm->last_recv_radius,
536 printf("Could not copy State attribute from previous "
537 "Access-Challenge\n");
541 wpa_printf(MSG_DEBUG, "Copied RADIUS State Attribute");
545 radius_client_send(hapd->radius, msg, RADIUS_AUTH, sta->addr);
549 radius_msg_free(msg);
552 #endif /* CONFIG_NO_RADIUS */
555 char *eap_type_text(u8 type)
558 case EAP_TYPE_IDENTITY: return "Identity";
559 case EAP_TYPE_NOTIFICATION: return "Notification";
560 case EAP_TYPE_NAK: return "Nak";
561 case EAP_TYPE_MD5: return "MD5-Challenge";
562 case EAP_TYPE_OTP: return "One-Time Password";
563 case EAP_TYPE_GTC: return "Generic Token Card";
564 case EAP_TYPE_TLS: return "TLS";
565 case EAP_TYPE_TTLS: return "TTLS";
566 case EAP_TYPE_PEAP: return "PEAP";
567 case EAP_TYPE_SIM: return "SIM";
568 case EAP_TYPE_FAST: return "FAST";
569 case EAP_TYPE_SAKE: return "SAKE";
570 case EAP_TYPE_PSK: return "PSK";
571 case EAP_TYPE_PAX: return "PAX";
572 default: return "Unknown";
577 static void handle_eap_response(struct hostapd_data *hapd,
578 struct sta_info *sta, struct eap_hdr *eap,
582 struct eapol_state_machine *sm = sta->eapol_sm;
586 data = (u8 *) (eap + 1);
588 if (len < sizeof(*eap) + 1) {
589 printf("handle_eap_response: too short response data\n");
593 sm->eap_type_supp = type = data[0];
595 hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
596 HOSTAPD_LEVEL_DEBUG, "received EAP packet (code=%d "
597 "id=%d len=%d) from STA: EAP Response-%s (%d)",
598 eap->code, eap->identifier, be_to_host16(eap->length),
599 eap_type_text(type), type);
601 sm->dot1xAuthEapolRespFramesRx++;
603 wpabuf_free(sm->eap_if->eapRespData);
604 sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len);
609 /* Process incoming EAP packet from Supplicant */
610 static void handle_eap(struct hostapd_data *hapd, struct sta_info *sta,
616 if (len < sizeof(*eap)) {
617 printf(" too short EAP packet\n");
621 eap = (struct eap_hdr *) buf;
623 eap_len = be_to_host16(eap->length);
624 wpa_printf(MSG_DEBUG, "EAP: code=%d identifier=%d length=%d",
625 eap->code, eap->identifier, eap_len);
626 if (eap_len < sizeof(*eap)) {
627 wpa_printf(MSG_DEBUG, " Invalid EAP length");
629 } else if (eap_len > len) {
630 wpa_printf(MSG_DEBUG, " Too short frame to contain this EAP "
633 } else if (eap_len < len) {
634 wpa_printf(MSG_DEBUG, " Ignoring %lu extra bytes after EAP "
635 "packet", (unsigned long) len - eap_len);
639 case EAP_CODE_REQUEST:
640 wpa_printf(MSG_DEBUG, " (request)");
642 case EAP_CODE_RESPONSE:
643 wpa_printf(MSG_DEBUG, " (response)");
644 handle_eap_response(hapd, sta, eap, eap_len);
646 case EAP_CODE_SUCCESS:
647 wpa_printf(MSG_DEBUG, " (success)");
649 case EAP_CODE_FAILURE:
650 wpa_printf(MSG_DEBUG, " (failure)");
653 wpa_printf(MSG_DEBUG, " (unknown code)");
660 * ieee802_1x_receive - Process the EAPOL frames from the Supplicant
661 * @hapd: hostapd BSS data
662 * @sa: Source address (sender of the EAPOL frame)
664 * @len: Length of buf in octets
666 * This function is called for each incoming EAPOL frame from the interface
668 void ieee802_1x_receive(struct hostapd_data *hapd, const u8 *sa, const u8 *buf,
671 struct sta_info *sta;
672 struct ieee802_1x_hdr *hdr;
673 struct ieee802_1x_eapol_key *key;
675 struct rsn_pmksa_cache_entry *pmksa;
677 if (!hapd->conf->ieee802_1x && !hapd->conf->wpa &&
678 !hapd->conf->wps_state)
681 wpa_printf(MSG_DEBUG, "IEEE 802.1X: %lu bytes from " MACSTR,
682 (unsigned long) len, MAC2STR(sa));
683 sta = ap_get_sta(hapd, sa);
684 if (!sta || !(sta->flags & WLAN_STA_ASSOC)) {
685 wpa_printf(MSG_DEBUG, "IEEE 802.1X data frame from not "
690 if (len < sizeof(*hdr)) {
691 printf(" too short IEEE 802.1X packet\n");
695 hdr = (struct ieee802_1x_hdr *) buf;
696 datalen = be_to_host16(hdr->length);
697 wpa_printf(MSG_DEBUG, " IEEE 802.1X: version=%d type=%d length=%d",
698 hdr->version, hdr->type, datalen);
700 if (len - sizeof(*hdr) < datalen) {
701 printf(" frame too short for this IEEE 802.1X packet\n");
703 sta->eapol_sm->dot1xAuthEapLengthErrorFramesRx++;
706 if (len - sizeof(*hdr) > datalen) {
707 wpa_printf(MSG_DEBUG, " ignoring %lu extra octets after "
708 "IEEE 802.1X packet",
709 (unsigned long) len - sizeof(*hdr) - datalen);
713 sta->eapol_sm->dot1xAuthLastEapolFrameVersion = hdr->version;
714 sta->eapol_sm->dot1xAuthEapolFramesRx++;
717 key = (struct ieee802_1x_eapol_key *) (hdr + 1);
718 if (datalen >= sizeof(struct ieee802_1x_eapol_key) &&
719 hdr->type == IEEE802_1X_TYPE_EAPOL_KEY &&
720 (key->type == EAPOL_KEY_TYPE_WPA ||
721 key->type == EAPOL_KEY_TYPE_RSN)) {
722 wpa_receive(hapd->wpa_auth, sta->wpa_sm, (u8 *) hdr,
723 sizeof(*hdr) + datalen);
727 if ((!hapd->conf->ieee802_1x &&
728 !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) ||
729 wpa_key_mgmt_wpa_psk(wpa_auth_sta_key_mgmt(sta->wpa_sm)))
732 if (!sta->eapol_sm) {
733 sta->eapol_sm = eapol_auth_alloc(hapd->eapol_auth, sta->addr,
734 sta->flags & WLAN_STA_PREAUTH,
740 if (!hapd->conf->ieee802_1x &&
741 ((sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) ==
742 WLAN_STA_MAYBE_WPS)) {
744 * Delay EAPOL frame transmission until a possible WPS
745 * STA initiates the handshake with EAPOL-Start.
747 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
749 #endif /* CONFIG_WPS */
751 sta->eapol_sm->eap_if->portEnabled = TRUE;
754 /* since we support version 1, we can ignore version field and proceed
755 * as specified in version 1 standard [IEEE Std 802.1X-2001, 7.5.5] */
756 /* TODO: actually, we are not version 1 anymore.. However, Version 2
757 * does not change frame contents, so should be ok to process frames
758 * more or less identically. Some changes might be needed for
759 * verification of fields. */
762 case IEEE802_1X_TYPE_EAP_PACKET:
763 handle_eap(hapd, sta, (u8 *) (hdr + 1), datalen);
766 case IEEE802_1X_TYPE_EAPOL_START:
767 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
768 HOSTAPD_LEVEL_DEBUG, "received EAPOL-Start "
770 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
771 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
773 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
774 HOSTAPD_LEVEL_DEBUG, "cached PMKSA "
775 "available - ignore it since "
776 "STA sent EAPOL-Start");
777 wpa_auth_sta_clear_pmksa(sta->wpa_sm, pmksa);
779 sta->eapol_sm->eapolStart = TRUE;
780 sta->eapol_sm->dot1xAuthEapolStartFramesRx++;
781 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
784 case IEEE802_1X_TYPE_EAPOL_LOGOFF:
785 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
786 HOSTAPD_LEVEL_DEBUG, "received EAPOL-Logoff "
788 sta->acct_terminate_cause =
789 RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
790 accounting_sta_stop(hapd, sta);
791 sta->eapol_sm->eapolLogoff = TRUE;
792 sta->eapol_sm->dot1xAuthEapolLogoffFramesRx++;
795 case IEEE802_1X_TYPE_EAPOL_KEY:
796 wpa_printf(MSG_DEBUG, " EAPOL-Key");
797 if (!(sta->flags & WLAN_STA_AUTHORIZED)) {
798 wpa_printf(MSG_DEBUG, " Dropped key data from "
799 "unauthorized Supplicant");
804 case IEEE802_1X_TYPE_EAPOL_ENCAPSULATED_ASF_ALERT:
805 wpa_printf(MSG_DEBUG, " EAPOL-Encapsulated-ASF-Alert");
806 /* TODO: implement support for this; show data */
810 wpa_printf(MSG_DEBUG, " unknown IEEE 802.1X packet type");
811 sta->eapol_sm->dot1xAuthInvalidEapolFramesRx++;
815 eapol_auth_step(sta->eapol_sm);
820 * ieee802_1x_new_station - Start IEEE 802.1X authentication
821 * @hapd: hostapd BSS data
824 * This function is called to start IEEE 802.1X authentication when a new
825 * station completes IEEE 802.11 association.
827 void ieee802_1x_new_station(struct hostapd_data *hapd, struct sta_info *sta)
829 struct rsn_pmksa_cache_entry *pmksa;
834 if (hapd->conf->wps_state && hapd->conf->wpa &&
835 (sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) {
837 * Need to enable IEEE 802.1X/EAPOL state machines for possible
838 * WPS handshake even if IEEE 802.1X/EAPOL is not used for
839 * authentication in this BSS.
843 #endif /* CONFIG_WPS */
845 if ((!force_1x && !hapd->conf->ieee802_1x) ||
846 wpa_key_mgmt_wpa_psk(wpa_auth_sta_key_mgmt(sta->wpa_sm)))
849 if (sta->eapol_sm == NULL) {
850 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
851 HOSTAPD_LEVEL_DEBUG, "start authentication");
852 sta->eapol_sm = eapol_auth_alloc(hapd->eapol_auth, sta->addr,
853 sta->flags & WLAN_STA_PREAUTH,
855 if (sta->eapol_sm == NULL) {
856 hostapd_logger(hapd, sta->addr,
857 HOSTAPD_MODULE_IEEE8021X,
859 "failed to allocate state machine");
866 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
867 if (!hapd->conf->ieee802_1x && !(sta->flags & WLAN_STA_WPS)) {
869 * Delay EAPOL frame transmission until a possible WPS
870 * initiates the handshake with EAPOL-Start.
872 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
874 #endif /* CONFIG_WPS */
876 sta->eapol_sm->eap_if->portEnabled = TRUE;
878 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
882 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
884 "PMK from PMKSA cache - skip IEEE 802.1X/EAP");
885 /* Setup EAPOL state machines to already authenticated state
886 * because of existing PMKSA information in the cache. */
887 sta->eapol_sm->keyRun = TRUE;
888 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
889 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
890 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
891 sta->eapol_sm->authSuccess = TRUE;
892 if (sta->eapol_sm->eap)
893 eap_sm_notify_cached(sta->eapol_sm->eap);
894 old_vlanid = sta->vlan_id;
895 pmksa_cache_to_eapol_data(pmksa, sta->eapol_sm);
896 if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
898 ap_sta_bind_vlan(hapd, sta, old_vlanid);
902 * Force EAPOL state machines to start
903 * re-authentication without having to wait for the
904 * Supplicant to send EAPOL-Start.
906 sta->eapol_sm->reAuthenticate = TRUE;
908 eapol_auth_step(sta->eapol_sm);
913 void ieee802_1x_free_station(struct sta_info *sta)
915 struct eapol_state_machine *sm = sta->eapol_sm;
920 sta->eapol_sm = NULL;
922 #ifndef CONFIG_NO_RADIUS
923 if (sm->last_recv_radius) {
924 radius_msg_free(sm->last_recv_radius);
925 os_free(sm->last_recv_radius);
927 radius_free_class(&sm->radius_class);
928 #endif /* CONFIG_NO_RADIUS */
930 os_free(sm->identity);
935 #ifndef CONFIG_NO_RADIUS
936 static void ieee802_1x_decapsulate_radius(struct hostapd_data *hapd,
937 struct sta_info *sta)
944 struct radius_msg *msg;
945 struct eapol_state_machine *sm = sta->eapol_sm;
947 if (sm == NULL || sm->last_recv_radius == NULL) {
949 sm->eap_if->aaaEapNoReq = TRUE;
953 msg = sm->last_recv_radius;
955 eap = radius_msg_get_eap(msg, &len);
957 /* RFC 3579, Chap. 2.6.3:
958 * RADIUS server SHOULD NOT send Access-Reject/no EAP-Message
960 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
961 HOSTAPD_LEVEL_WARNING, "could not extract "
962 "EAP-Message from RADIUS message");
963 sm->eap_if->aaaEapNoReq = TRUE;
967 if (len < sizeof(*hdr)) {
968 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
969 HOSTAPD_LEVEL_WARNING, "too short EAP packet "
970 "received from authentication server");
972 sm->eap_if->aaaEapNoReq = TRUE;
976 if (len > sizeof(*hdr))
977 eap_type = eap[sizeof(*hdr)];
979 hdr = (struct eap_hdr *) eap;
981 case EAP_CODE_REQUEST:
983 sm->eap_type_authsrv = eap_type;
984 os_snprintf(buf, sizeof(buf), "EAP-Request-%s (%d)",
985 eap_type >= 0 ? eap_type_text(eap_type) : "??",
988 case EAP_CODE_RESPONSE:
989 os_snprintf(buf, sizeof(buf), "EAP Response-%s (%d)",
990 eap_type >= 0 ? eap_type_text(eap_type) : "??",
993 case EAP_CODE_SUCCESS:
994 os_strlcpy(buf, "EAP Success", sizeof(buf));
996 case EAP_CODE_FAILURE:
997 os_strlcpy(buf, "EAP Failure", sizeof(buf));
1000 os_strlcpy(buf, "unknown EAP code", sizeof(buf));
1003 buf[sizeof(buf) - 1] = '\0';
1004 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1005 HOSTAPD_LEVEL_DEBUG, "decapsulated EAP packet (code=%d "
1006 "id=%d len=%d) from RADIUS server: %s",
1007 hdr->code, hdr->identifier, be_to_host16(hdr->length),
1009 sm->eap_if->aaaEapReq = TRUE;
1011 wpabuf_free(sm->eap_if->aaaEapReqData);
1012 sm->eap_if->aaaEapReqData = wpabuf_alloc_ext_data(eap, len);
1016 static void ieee802_1x_get_keys(struct hostapd_data *hapd,
1017 struct sta_info *sta, struct radius_msg *msg,
1018 struct radius_msg *req,
1019 const u8 *shared_secret,
1020 size_t shared_secret_len)
1022 struct radius_ms_mppe_keys *keys;
1023 struct eapol_state_machine *sm = sta->eapol_sm;
1027 keys = radius_msg_get_ms_keys(msg, req, shared_secret,
1030 if (keys && keys->send && keys->recv) {
1031 size_t len = keys->send_len + keys->recv_len;
1032 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Send-Key",
1033 keys->send, keys->send_len);
1034 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Recv-Key",
1035 keys->recv, keys->recv_len);
1037 os_free(sm->eap_if->aaaEapKeyData);
1038 sm->eap_if->aaaEapKeyData = os_malloc(len);
1039 if (sm->eap_if->aaaEapKeyData) {
1040 os_memcpy(sm->eap_if->aaaEapKeyData, keys->recv,
1042 os_memcpy(sm->eap_if->aaaEapKeyData + keys->recv_len,
1043 keys->send, keys->send_len);
1044 sm->eap_if->aaaEapKeyDataLen = len;
1045 sm->eap_if->aaaEapKeyAvailable = TRUE;
1050 os_free(keys->send);
1051 os_free(keys->recv);
1057 static void ieee802_1x_store_radius_class(struct hostapd_data *hapd,
1058 struct sta_info *sta,
1059 struct radius_msg *msg)
1063 struct eapol_state_machine *sm = sta->eapol_sm;
1065 struct radius_attr_data *nclass;
1066 size_t nclass_count;
1068 if (!hapd->conf->radius->acct_server || hapd->radius == NULL ||
1072 radius_free_class(&sm->radius_class);
1073 count = radius_msg_count_attr(msg, RADIUS_ATTR_CLASS, 1);
1077 nclass = os_zalloc(count * sizeof(struct radius_attr_data));
1084 for (i = 0; i < count; i++) {
1086 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CLASS,
1092 } while (class_len < 1);
1094 nclass[nclass_count].data = os_malloc(class_len);
1095 if (nclass[nclass_count].data == NULL)
1098 os_memcpy(nclass[nclass_count].data, class, class_len);
1099 nclass[nclass_count].len = class_len;
1103 sm->radius_class.attr = nclass;
1104 sm->radius_class.count = nclass_count;
1105 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Stored %lu RADIUS Class "
1106 "attributes for " MACSTR,
1107 (unsigned long) sm->radius_class.count,
1108 MAC2STR(sta->addr));
1112 /* Update sta->identity based on User-Name attribute in Access-Accept */
1113 static void ieee802_1x_update_sta_identity(struct hostapd_data *hapd,
1114 struct sta_info *sta,
1115 struct radius_msg *msg)
1119 struct eapol_state_machine *sm = sta->eapol_sm;
1124 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_USER_NAME, &buf, &len,
1128 identity = os_malloc(len + 1);
1129 if (identity == NULL)
1132 os_memcpy(identity, buf, len);
1133 identity[len] = '\0';
1135 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1136 HOSTAPD_LEVEL_DEBUG, "old identity '%s' updated with "
1137 "User-Name from Access-Accept '%s'",
1138 sm->identity ? (char *) sm->identity : "N/A",
1141 os_free(sm->identity);
1142 sm->identity = identity;
1143 sm->identity_len = len;
1147 struct sta_id_search {
1149 struct eapol_state_machine *sm;
1153 static int ieee802_1x_select_radius_identifier(struct hostapd_data *hapd,
1154 struct sta_info *sta,
1157 struct sta_id_search *id_search = ctx;
1158 struct eapol_state_machine *sm = sta->eapol_sm;
1160 if (sm && sm->radius_identifier >= 0 &&
1161 sm->radius_identifier == id_search->identifier) {
1169 static struct eapol_state_machine *
1170 ieee802_1x_search_radius_identifier(struct hostapd_data *hapd, u8 identifier)
1172 struct sta_id_search id_search;
1173 id_search.identifier = identifier;
1174 id_search.sm = NULL;
1175 ap_for_each_sta(hapd, ieee802_1x_select_radius_identifier, &id_search);
1176 return id_search.sm;
1181 * ieee802_1x_receive_auth - Process RADIUS frames from Authentication Server
1182 * @msg: RADIUS response message
1183 * @req: RADIUS request message
1184 * @shared_secret: RADIUS shared secret
1185 * @shared_secret_len: Length of shared_secret in octets
1186 * @data: Context data (struct hostapd_data *)
1187 * Returns: Processing status
1189 static RadiusRxResult
1190 ieee802_1x_receive_auth(struct radius_msg *msg, struct radius_msg *req,
1191 const u8 *shared_secret, size_t shared_secret_len,
1194 struct hostapd_data *hapd = data;
1195 struct sta_info *sta;
1196 u32 session_timeout = 0, termination_action, acct_interim_interval;
1197 int session_timeout_set, old_vlanid = 0;
1198 struct eapol_state_machine *sm;
1199 int override_eapReq = 0;
1201 sm = ieee802_1x_search_radius_identifier(hapd, msg->hdr->identifier);
1203 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Could not find matching "
1204 "station for this RADIUS message");
1205 return RADIUS_RX_UNKNOWN;
1209 /* RFC 2869, Ch. 5.13: valid Message-Authenticator attribute MUST be
1210 * present when packet contains an EAP-Message attribute */
1211 if (msg->hdr->code == RADIUS_CODE_ACCESS_REJECT &&
1212 radius_msg_get_attr(msg, RADIUS_ATTR_MESSAGE_AUTHENTICATOR, NULL,
1214 radius_msg_get_attr(msg, RADIUS_ATTR_EAP_MESSAGE, NULL, 0) < 0) {
1215 wpa_printf(MSG_DEBUG, "Allowing RADIUS Access-Reject without "
1216 "Message-Authenticator since it does not include "
1218 } else if (radius_msg_verify(msg, shared_secret, shared_secret_len,
1220 printf("Incoming RADIUS packet did not have correct "
1221 "Message-Authenticator - dropped\n");
1222 return RADIUS_RX_INVALID_AUTHENTICATOR;
1225 if (msg->hdr->code != RADIUS_CODE_ACCESS_ACCEPT &&
1226 msg->hdr->code != RADIUS_CODE_ACCESS_REJECT &&
1227 msg->hdr->code != RADIUS_CODE_ACCESS_CHALLENGE) {
1228 printf("Unknown RADIUS message code\n");
1229 return RADIUS_RX_UNKNOWN;
1232 sm->radius_identifier = -1;
1233 wpa_printf(MSG_DEBUG, "RADIUS packet matching with station " MACSTR,
1234 MAC2STR(sta->addr));
1236 if (sm->last_recv_radius) {
1237 radius_msg_free(sm->last_recv_radius);
1238 os_free(sm->last_recv_radius);
1241 sm->last_recv_radius = msg;
1243 session_timeout_set =
1244 !radius_msg_get_attr_int32(msg, RADIUS_ATTR_SESSION_TIMEOUT,
1246 if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_TERMINATION_ACTION,
1247 &termination_action))
1248 termination_action = RADIUS_TERMINATION_ACTION_DEFAULT;
1250 if (hapd->conf->radius->acct_interim_interval == 0 &&
1251 msg->hdr->code == RADIUS_CODE_ACCESS_ACCEPT &&
1252 radius_msg_get_attr_int32(msg, RADIUS_ATTR_ACCT_INTERIM_INTERVAL,
1253 &acct_interim_interval) == 0) {
1254 if (acct_interim_interval < 60) {
1255 hostapd_logger(hapd, sta->addr,
1256 HOSTAPD_MODULE_IEEE8021X,
1258 "ignored too small "
1259 "Acct-Interim-Interval %d",
1260 acct_interim_interval);
1262 sta->acct_interim_interval = acct_interim_interval;
1266 switch (msg->hdr->code) {
1267 case RADIUS_CODE_ACCESS_ACCEPT:
1268 if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
1270 #ifndef CONFIG_NO_VLAN
1272 old_vlanid = sta->vlan_id;
1273 sta->vlan_id = radius_msg_get_vlanid(msg);
1275 if (sta->vlan_id > 0 &&
1276 hostapd_get_vlan_id_ifname(hapd->conf->vlan,
1278 hostapd_logger(hapd, sta->addr,
1279 HOSTAPD_MODULE_RADIUS,
1281 "VLAN ID %d", sta->vlan_id);
1282 } else if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_REQUIRED) {
1283 sta->eapol_sm->authFail = TRUE;
1284 hostapd_logger(hapd, sta->addr,
1285 HOSTAPD_MODULE_IEEE8021X,
1286 HOSTAPD_LEVEL_INFO, "authentication "
1287 "server did not include required VLAN "
1288 "ID in Access-Accept");
1291 #endif /* CONFIG_NO_VLAN */
1293 ap_sta_bind_vlan(hapd, sta, old_vlanid);
1295 /* RFC 3580, Ch. 3.17 */
1296 if (session_timeout_set && termination_action ==
1297 RADIUS_TERMINATION_ACTION_RADIUS_REQUEST) {
1298 sm->reAuthPeriod = session_timeout;
1299 } else if (session_timeout_set)
1300 ap_sta_session_timeout(hapd, sta, session_timeout);
1302 sm->eap_if->aaaSuccess = TRUE;
1303 override_eapReq = 1;
1304 ieee802_1x_get_keys(hapd, sta, msg, req, shared_secret,
1306 ieee802_1x_store_radius_class(hapd, sta, msg);
1307 ieee802_1x_update_sta_identity(hapd, sta, msg);
1308 if (sm->eap_if->eapKeyAvailable &&
1309 wpa_auth_pmksa_add(sta->wpa_sm, sm->eapol_key_crypt,
1310 session_timeout_set ?
1311 (int) session_timeout : -1, sm) == 0) {
1312 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
1313 HOSTAPD_LEVEL_DEBUG,
1314 "Added PMKSA cache entry");
1317 case RADIUS_CODE_ACCESS_REJECT:
1318 sm->eap_if->aaaFail = TRUE;
1319 override_eapReq = 1;
1321 case RADIUS_CODE_ACCESS_CHALLENGE:
1322 sm->eap_if->aaaEapReq = TRUE;
1323 if (session_timeout_set) {
1324 /* RFC 2869, Ch. 2.3.2; RFC 3580, Ch. 3.17 */
1325 sm->eap_if->aaaMethodTimeout = session_timeout;
1326 hostapd_logger(hapd, sm->addr,
1327 HOSTAPD_MODULE_IEEE8021X,
1328 HOSTAPD_LEVEL_DEBUG,
1329 "using EAP timeout of %d seconds (from "
1331 sm->eap_if->aaaMethodTimeout);
1334 * Use dynamic retransmission behavior per EAP
1337 sm->eap_if->aaaMethodTimeout = 0;
1342 ieee802_1x_decapsulate_radius(hapd, sta);
1343 if (override_eapReq)
1344 sm->eap_if->aaaEapReq = FALSE;
1346 eapol_auth_step(sm);
1348 return RADIUS_RX_QUEUED;
1350 #endif /* CONFIG_NO_RADIUS */
1353 void ieee802_1x_abort_auth(struct hostapd_data *hapd, struct sta_info *sta)
1355 struct eapol_state_machine *sm = sta->eapol_sm;
1359 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1360 HOSTAPD_LEVEL_DEBUG, "aborting authentication");
1362 #ifndef CONFIG_NO_RADIUS
1363 if (sm->last_recv_radius) {
1364 radius_msg_free(sm->last_recv_radius);
1365 os_free(sm->last_recv_radius);
1366 sm->last_recv_radius = NULL;
1368 #endif /* CONFIG_NO_RADIUS */
1370 if (sm->eap_if->eapTimeout) {
1372 * Disconnect the STA since it did not reply to the last EAP
1373 * request and we cannot continue EAP processing (EAP-Failure
1374 * could only be sent if the EAP peer actually replied).
1376 sm->eap_if->portEnabled = FALSE;
1377 hostapd_sta_deauth(hapd, sta->addr,
1378 WLAN_REASON_PREV_AUTH_NOT_VALID);
1379 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC |
1380 WLAN_STA_AUTHORIZED);
1381 eloop_cancel_timeout(ap_handle_timer, hapd, sta);
1382 eloop_register_timeout(0, 0, ap_handle_timer, hapd, sta);
1383 sta->timeout_next = STA_REMOVE;
1388 #ifdef HOSTAPD_DUMP_STATE
1389 static void fprint_char(FILE *f, char c)
1391 if (c >= 32 && c < 127)
1392 fprintf(f, "%c", c);
1394 fprintf(f, "<%02x>", c);
1398 void ieee802_1x_dump_state(FILE *f, const char *prefix, struct sta_info *sta)
1400 struct eapol_state_machine *sm = sta->eapol_sm;
1404 fprintf(f, "%sIEEE 802.1X:\n", prefix);
1408 fprintf(f, "%sidentity=", prefix);
1409 for (i = 0; i < sm->identity_len; i++)
1410 fprint_char(f, sm->identity[i]);
1414 fprintf(f, "%slast EAP type: Authentication Server: %d (%s) "
1415 "Supplicant: %d (%s)\n", prefix,
1416 sm->eap_type_authsrv, eap_type_text(sm->eap_type_authsrv),
1417 sm->eap_type_supp, eap_type_text(sm->eap_type_supp));
1419 fprintf(f, "%scached_packets=%s\n", prefix,
1420 sm->last_recv_radius ? "[RX RADIUS]" : "");
1422 eapol_auth_dump_state(f, prefix, sm);
1424 #endif /* HOSTAPD_DUMP_STATE */
1427 static int ieee802_1x_rekey_broadcast(struct hostapd_data *hapd)
1429 if (hapd->conf->default_wep_key_len < 1)
1432 os_free(hapd->default_wep_key);
1433 hapd->default_wep_key = os_malloc(hapd->conf->default_wep_key_len);
1434 if (hapd->default_wep_key == NULL ||
1435 os_get_random(hapd->default_wep_key,
1436 hapd->conf->default_wep_key_len)) {
1437 printf("Could not generate random WEP key.\n");
1438 os_free(hapd->default_wep_key);
1439 hapd->default_wep_key = NULL;
1443 wpa_hexdump_key(MSG_DEBUG, "IEEE 802.1X: New default WEP key",
1444 hapd->default_wep_key,
1445 hapd->conf->default_wep_key_len);
1451 static int ieee802_1x_sta_key_available(struct hostapd_data *hapd,
1452 struct sta_info *sta, void *ctx)
1454 if (sta->eapol_sm) {
1455 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
1456 eapol_auth_step(sta->eapol_sm);
1462 static void ieee802_1x_rekey(void *eloop_ctx, void *timeout_ctx)
1464 struct hostapd_data *hapd = eloop_ctx;
1466 if (hapd->default_wep_key_idx >= 3)
1467 hapd->default_wep_key_idx =
1468 hapd->conf->individual_wep_key_len > 0 ? 1 : 0;
1470 hapd->default_wep_key_idx++;
1472 wpa_printf(MSG_DEBUG, "IEEE 802.1X: New default WEP key index %d",
1473 hapd->default_wep_key_idx);
1475 if (ieee802_1x_rekey_broadcast(hapd)) {
1476 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1477 HOSTAPD_LEVEL_WARNING, "failed to generate a "
1478 "new broadcast key");
1479 os_free(hapd->default_wep_key);
1480 hapd->default_wep_key = NULL;
1484 /* TODO: Could setup key for RX here, but change default TX keyid only
1485 * after new broadcast key has been sent to all stations. */
1486 if (hostapd_set_encryption(hapd->conf->iface, hapd, "WEP", NULL,
1487 hapd->default_wep_key_idx,
1488 hapd->default_wep_key,
1489 hapd->conf->default_wep_key_len, 1)) {
1490 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1491 HOSTAPD_LEVEL_WARNING, "failed to configure a "
1492 "new broadcast key");
1493 os_free(hapd->default_wep_key);
1494 hapd->default_wep_key = NULL;
1498 ap_for_each_sta(hapd, ieee802_1x_sta_key_available, NULL);
1500 if (hapd->conf->wep_rekeying_period > 0) {
1501 eloop_register_timeout(hapd->conf->wep_rekeying_period, 0,
1502 ieee802_1x_rekey, hapd, NULL);
1507 static void ieee802_1x_eapol_send(void *ctx, void *sta_ctx, u8 type,
1508 const u8 *data, size_t datalen)
1510 ieee802_1x_send(ctx, sta_ctx, type, data, datalen);
1514 static void ieee802_1x_aaa_send(void *ctx, void *sta_ctx,
1515 const u8 *data, size_t datalen)
1517 #ifndef CONFIG_NO_RADIUS
1518 struct hostapd_data *hapd = ctx;
1519 struct sta_info *sta = sta_ctx;
1521 ieee802_1x_encapsulate_radius(hapd, sta, data, datalen);
1522 #endif /* CONFIG_NO_RADIUS */
1526 static void _ieee802_1x_finished(void *ctx, void *sta_ctx, int success,
1529 struct hostapd_data *hapd = ctx;
1530 struct sta_info *sta = sta_ctx;
1532 rsn_preauth_finished(hapd, sta, success);
1534 ieee802_1x_finished(hapd, sta, success);
1538 static int ieee802_1x_get_eap_user(void *ctx, const u8 *identity,
1539 size_t identity_len, int phase2,
1540 struct eap_user *user)
1542 struct hostapd_data *hapd = ctx;
1543 const struct hostapd_eap_user *eap_user;
1546 eap_user = hostapd_get_eap_user(hapd->conf, identity,
1547 identity_len, phase2);
1548 if (eap_user == NULL)
1551 os_memset(user, 0, sizeof(*user));
1552 user->phase2 = phase2;
1553 count = EAP_USER_MAX_METHODS;
1554 if (count > EAP_MAX_METHODS)
1555 count = EAP_MAX_METHODS;
1556 for (i = 0; i < count; i++) {
1557 user->methods[i].vendor = eap_user->methods[i].vendor;
1558 user->methods[i].method = eap_user->methods[i].method;
1561 if (eap_user->password) {
1562 user->password = os_malloc(eap_user->password_len);
1563 if (user->password == NULL)
1565 os_memcpy(user->password, eap_user->password,
1566 eap_user->password_len);
1567 user->password_len = eap_user->password_len;
1569 user->force_version = eap_user->force_version;
1570 user->ttls_auth = eap_user->ttls_auth;
1576 static int ieee802_1x_sta_entry_alive(void *ctx, const u8 *addr)
1578 struct hostapd_data *hapd = ctx;
1579 struct sta_info *sta;
1580 sta = ap_get_sta(hapd, addr);
1581 if (sta == NULL || sta->eapol_sm == NULL)
1587 static void ieee802_1x_logger(void *ctx, const u8 *addr,
1588 eapol_logger_level level, const char *txt)
1590 #ifndef CONFIG_NO_HOSTAPD_LOGGER
1591 struct hostapd_data *hapd = ctx;
1595 case EAPOL_LOGGER_WARNING:
1596 hlevel = HOSTAPD_LEVEL_WARNING;
1598 case EAPOL_LOGGER_INFO:
1599 hlevel = HOSTAPD_LEVEL_INFO;
1601 case EAPOL_LOGGER_DEBUG:
1603 hlevel = HOSTAPD_LEVEL_DEBUG;
1607 hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE8021X, hlevel, "%s",
1609 #endif /* CONFIG_NO_HOSTAPD_LOGGER */
1613 static void ieee802_1x_set_port_authorized(void *ctx, void *sta_ctx,
1616 struct hostapd_data *hapd = ctx;
1617 struct sta_info *sta = sta_ctx;
1618 ieee802_1x_set_sta_authorized(hapd, sta, authorized);
1622 static void _ieee802_1x_abort_auth(void *ctx, void *sta_ctx)
1624 struct hostapd_data *hapd = ctx;
1625 struct sta_info *sta = sta_ctx;
1626 ieee802_1x_abort_auth(hapd, sta);
1630 static void _ieee802_1x_tx_key(void *ctx, void *sta_ctx)
1632 struct hostapd_data *hapd = ctx;
1633 struct sta_info *sta = sta_ctx;
1634 ieee802_1x_tx_key(hapd, sta);
1638 int ieee802_1x_init(struct hostapd_data *hapd)
1641 struct eapol_auth_config conf;
1642 struct eapol_auth_cb cb;
1644 os_memset(&conf, 0, sizeof(conf));
1646 conf.eap_reauth_period = hapd->conf->eap_reauth_period;
1647 conf.wpa = hapd->conf->wpa;
1648 conf.individual_wep_key_len = hapd->conf->individual_wep_key_len;
1649 conf.eap_server = hapd->conf->eap_server;
1650 conf.ssl_ctx = hapd->ssl_ctx;
1651 conf.eap_sim_db_priv = hapd->eap_sim_db_priv;
1652 conf.eap_req_id_text = hapd->conf->eap_req_id_text;
1653 conf.eap_req_id_text_len = hapd->conf->eap_req_id_text_len;
1654 conf.pac_opaque_encr_key = hapd->conf->pac_opaque_encr_key;
1655 conf.eap_fast_a_id = hapd->conf->eap_fast_a_id;
1656 conf.eap_fast_a_id_len = hapd->conf->eap_fast_a_id_len;
1657 conf.eap_fast_a_id_info = hapd->conf->eap_fast_a_id_info;
1658 conf.eap_fast_prov = hapd->conf->eap_fast_prov;
1659 conf.pac_key_lifetime = hapd->conf->pac_key_lifetime;
1660 conf.pac_key_refresh_time = hapd->conf->pac_key_refresh_time;
1661 conf.eap_sim_aka_result_ind = hapd->conf->eap_sim_aka_result_ind;
1662 conf.tnc = hapd->conf->tnc;
1663 conf.wps = hapd->wps;
1665 os_memset(&cb, 0, sizeof(cb));
1666 cb.eapol_send = ieee802_1x_eapol_send;
1667 cb.aaa_send = ieee802_1x_aaa_send;
1668 cb.finished = _ieee802_1x_finished;
1669 cb.get_eap_user = ieee802_1x_get_eap_user;
1670 cb.sta_entry_alive = ieee802_1x_sta_entry_alive;
1671 cb.logger = ieee802_1x_logger;
1672 cb.set_port_authorized = ieee802_1x_set_port_authorized;
1673 cb.abort_auth = _ieee802_1x_abort_auth;
1674 cb.tx_key = _ieee802_1x_tx_key;
1676 hapd->eapol_auth = eapol_auth_init(&conf, &cb);
1677 if (hapd->eapol_auth == NULL)
1680 if ((hapd->conf->ieee802_1x || hapd->conf->wpa) &&
1681 hostapd_set_ieee8021x(hapd->conf->iface, hapd, 1))
1684 #ifndef CONFIG_NO_RADIUS
1685 if (radius_client_register(hapd->radius, RADIUS_AUTH,
1686 ieee802_1x_receive_auth, hapd))
1688 #endif /* CONFIG_NO_RADIUS */
1690 if (hapd->conf->default_wep_key_len) {
1691 hostapd_set_privacy(hapd, 1);
1693 for (i = 0; i < 4; i++)
1694 hostapd_set_encryption(hapd->conf->iface, hapd,
1695 "none", NULL, i, NULL, 0, 0);
1697 ieee802_1x_rekey(hapd, NULL);
1699 if (hapd->default_wep_key == NULL)
1707 void ieee802_1x_deinit(struct hostapd_data *hapd)
1709 eloop_cancel_timeout(ieee802_1x_rekey, hapd, NULL);
1711 if (hapd->driver != NULL &&
1712 (hapd->conf->ieee802_1x || hapd->conf->wpa))
1713 hostapd_set_ieee8021x(hapd->conf->iface, hapd, 0);
1715 eapol_auth_deinit(hapd->eapol_auth);
1716 hapd->eapol_auth = NULL;
1720 int ieee802_1x_reconfig(struct hostapd_data *hapd,
1721 struct hostapd_config *oldconf,
1722 struct hostapd_bss_config *oldbss)
1724 ieee802_1x_deinit(hapd);
1725 return ieee802_1x_init(hapd);
1729 int ieee802_1x_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
1730 const u8 *buf, size_t len, int ack)
1732 struct ieee80211_hdr *hdr;
1733 struct ieee802_1x_hdr *xhdr;
1734 struct ieee802_1x_eapol_key *key;
1736 const unsigned char rfc1042_hdr[ETH_ALEN] =
1737 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
1741 if (len < sizeof(*hdr) + sizeof(rfc1042_hdr) + 2 + sizeof(*xhdr))
1744 hdr = (struct ieee80211_hdr *) buf;
1745 pos = (u8 *) (hdr + 1);
1746 if (os_memcmp(pos, rfc1042_hdr, sizeof(rfc1042_hdr)) != 0)
1748 pos += sizeof(rfc1042_hdr);
1749 if (WPA_GET_BE16(pos) != ETH_P_PAE)
1753 xhdr = (struct ieee802_1x_hdr *) pos;
1754 pos += sizeof(*xhdr);
1756 wpa_printf(MSG_DEBUG, "IEEE 802.1X: " MACSTR " TX status - version=%d "
1757 "type=%d length=%d - ack=%d",
1758 MAC2STR(sta->addr), xhdr->version, xhdr->type,
1759 be_to_host16(xhdr->length), ack);
1761 /* EAPOL EAP-Packet packets are eventually re-sent by either Supplicant
1762 * or Authenticator state machines, but EAPOL-Key packets are not
1763 * retransmitted in case of failure. Try to re-sent failed EAPOL-Key
1764 * packets couple of times because otherwise STA keys become
1765 * unsynchronized with AP. */
1766 if (xhdr->type == IEEE802_1X_TYPE_EAPOL_KEY && !ack &&
1767 pos + sizeof(*key) <= buf + len) {
1768 key = (struct ieee802_1x_eapol_key *) pos;
1769 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1770 HOSTAPD_LEVEL_DEBUG, "did not Ack EAPOL-Key "
1771 "frame (%scast index=%d)",
1772 key->key_index & BIT(7) ? "uni" : "broad",
1773 key->key_index & ~BIT(7));
1774 /* TODO: re-send EAPOL-Key couple of times (with short delay
1775 * between them?). If all attempt fail, report error and
1776 * deauthenticate STA so that it will get new keys when
1777 * authenticating again (e.g., after returning in range).
1778 * Separate limit/transmit state needed both for unicast and
1779 * broadcast keys(?) */
1781 /* TODO: could move unicast key configuration from ieee802_1x_tx_key()
1782 * to here and change the key only if the EAPOL-Key packet was Acked.
1789 u8 * ieee802_1x_get_identity(struct eapol_state_machine *sm, size_t *len)
1791 if (sm == NULL || sm->identity == NULL)
1794 *len = sm->identity_len;
1795 return sm->identity;
1799 u8 * ieee802_1x_get_radius_class(struct eapol_state_machine *sm, size_t *len,
1802 if (sm == NULL || sm->radius_class.attr == NULL ||
1803 idx >= (int) sm->radius_class.count)
1806 *len = sm->radius_class.attr[idx].len;
1807 return sm->radius_class.attr[idx].data;
1811 const u8 * ieee802_1x_get_key(struct eapol_state_machine *sm, size_t *len)
1816 *len = sm->eap_if->eapKeyDataLen;
1817 return sm->eap_if->eapKeyData;
1821 void ieee802_1x_notify_port_enabled(struct eapol_state_machine *sm,
1826 sm->eap_if->portEnabled = enabled ? TRUE : FALSE;
1827 eapol_auth_step(sm);
1831 void ieee802_1x_notify_port_valid(struct eapol_state_machine *sm,
1836 sm->portValid = valid ? TRUE : FALSE;
1837 eapol_auth_step(sm);
1841 void ieee802_1x_notify_pre_auth(struct eapol_state_machine *sm, int pre_auth)
1846 sm->flags |= EAPOL_SM_PREAUTH;
1848 sm->flags &= ~EAPOL_SM_PREAUTH;
1852 static const char * bool_txt(Boolean bool)
1854 return bool ? "TRUE" : "FALSE";
1858 int ieee802_1x_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
1865 int ieee802_1x_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
1866 char *buf, size_t buflen)
1869 struct eapol_state_machine *sm = sta->eapol_sm;
1874 ret = os_snprintf(buf + len, buflen - len,
1875 "dot1xPaePortNumber=%d\n"
1876 "dot1xPaePortProtocolVersion=%d\n"
1877 "dot1xPaePortCapabilities=1\n"
1878 "dot1xPaePortInitialize=%d\n"
1879 "dot1xPaePortReauthenticate=FALSE\n",
1883 if (ret < 0 || (size_t) ret >= buflen - len)
1887 /* dot1xAuthConfigTable */
1888 ret = os_snprintf(buf + len, buflen - len,
1889 "dot1xAuthPaeState=%d\n"
1890 "dot1xAuthBackendAuthState=%d\n"
1891 "dot1xAuthAdminControlledDirections=%d\n"
1892 "dot1xAuthOperControlledDirections=%d\n"
1893 "dot1xAuthAuthControlledPortStatus=%d\n"
1894 "dot1xAuthAuthControlledPortControl=%d\n"
1895 "dot1xAuthQuietPeriod=%u\n"
1896 "dot1xAuthServerTimeout=%u\n"
1897 "dot1xAuthReAuthPeriod=%u\n"
1898 "dot1xAuthReAuthEnabled=%s\n"
1899 "dot1xAuthKeyTxEnabled=%s\n",
1900 sm->auth_pae_state + 1,
1901 sm->be_auth_state + 1,
1902 sm->adminControlledDirections,
1903 sm->operControlledDirections,
1909 bool_txt(sm->reAuthEnabled),
1910 bool_txt(sm->keyTxEnabled));
1911 if (ret < 0 || (size_t) ret >= buflen - len)
1915 /* dot1xAuthStatsTable */
1916 ret = os_snprintf(buf + len, buflen - len,
1917 "dot1xAuthEapolFramesRx=%u\n"
1918 "dot1xAuthEapolFramesTx=%u\n"
1919 "dot1xAuthEapolStartFramesRx=%u\n"
1920 "dot1xAuthEapolLogoffFramesRx=%u\n"
1921 "dot1xAuthEapolRespIdFramesRx=%u\n"
1922 "dot1xAuthEapolRespFramesRx=%u\n"
1923 "dot1xAuthEapolReqIdFramesTx=%u\n"
1924 "dot1xAuthEapolReqFramesTx=%u\n"
1925 "dot1xAuthInvalidEapolFramesRx=%u\n"
1926 "dot1xAuthEapLengthErrorFramesRx=%u\n"
1927 "dot1xAuthLastEapolFrameVersion=%u\n"
1928 "dot1xAuthLastEapolFrameSource=" MACSTR "\n",
1929 sm->dot1xAuthEapolFramesRx,
1930 sm->dot1xAuthEapolFramesTx,
1931 sm->dot1xAuthEapolStartFramesRx,
1932 sm->dot1xAuthEapolLogoffFramesRx,
1933 sm->dot1xAuthEapolRespIdFramesRx,
1934 sm->dot1xAuthEapolRespFramesRx,
1935 sm->dot1xAuthEapolReqIdFramesTx,
1936 sm->dot1xAuthEapolReqFramesTx,
1937 sm->dot1xAuthInvalidEapolFramesRx,
1938 sm->dot1xAuthEapLengthErrorFramesRx,
1939 sm->dot1xAuthLastEapolFrameVersion,
1941 if (ret < 0 || (size_t) ret >= buflen - len)
1945 /* dot1xAuthDiagTable */
1946 ret = os_snprintf(buf + len, buflen - len,
1947 "dot1xAuthEntersConnecting=%u\n"
1948 "dot1xAuthEapLogoffsWhileConnecting=%u\n"
1949 "dot1xAuthEntersAuthenticating=%u\n"
1950 "dot1xAuthAuthSuccessesWhileAuthenticating=%u\n"
1951 "dot1xAuthAuthTimeoutsWhileAuthenticating=%u\n"
1952 "dot1xAuthAuthFailWhileAuthenticating=%u\n"
1953 "dot1xAuthAuthEapStartsWhileAuthenticating=%u\n"
1954 "dot1xAuthAuthEapLogoffWhileAuthenticating=%u\n"
1955 "dot1xAuthAuthReauthsWhileAuthenticated=%u\n"
1956 "dot1xAuthAuthEapStartsWhileAuthenticated=%u\n"
1957 "dot1xAuthAuthEapLogoffWhileAuthenticated=%u\n"
1958 "dot1xAuthBackendResponses=%u\n"
1959 "dot1xAuthBackendAccessChallenges=%u\n"
1960 "dot1xAuthBackendOtherRequestsToSupplicant=%u\n"
1961 "dot1xAuthBackendAuthSuccesses=%u\n"
1962 "dot1xAuthBackendAuthFails=%u\n",
1963 sm->authEntersConnecting,
1964 sm->authEapLogoffsWhileConnecting,
1965 sm->authEntersAuthenticating,
1966 sm->authAuthSuccessesWhileAuthenticating,
1967 sm->authAuthTimeoutsWhileAuthenticating,
1968 sm->authAuthFailWhileAuthenticating,
1969 sm->authAuthEapStartsWhileAuthenticating,
1970 sm->authAuthEapLogoffWhileAuthenticating,
1971 sm->authAuthReauthsWhileAuthenticated,
1972 sm->authAuthEapStartsWhileAuthenticated,
1973 sm->authAuthEapLogoffWhileAuthenticated,
1974 sm->backendResponses,
1975 sm->backendAccessChallenges,
1976 sm->backendOtherRequestsToSupplicant,
1977 sm->backendAuthSuccesses,
1978 sm->backendAuthFails);
1979 if (ret < 0 || (size_t) ret >= buflen - len)
1983 /* dot1xAuthSessionStatsTable */
1984 ret = os_snprintf(buf + len, buflen - len,
1985 /* TODO: dot1xAuthSessionOctetsRx */
1986 /* TODO: dot1xAuthSessionOctetsTx */
1987 /* TODO: dot1xAuthSessionFramesRx */
1988 /* TODO: dot1xAuthSessionFramesTx */
1989 "dot1xAuthSessionId=%08X-%08X\n"
1990 "dot1xAuthSessionAuthenticMethod=%d\n"
1991 "dot1xAuthSessionTime=%u\n"
1992 "dot1xAuthSessionTerminateCause=999\n"
1993 "dot1xAuthSessionUserName=%s\n",
1994 sta->acct_session_id_hi, sta->acct_session_id_lo,
1995 (wpa_key_mgmt_wpa_ieee8021x(
1996 wpa_auth_sta_key_mgmt(sta->wpa_sm))) ?
1998 (unsigned int) (time(NULL) -
1999 sta->acct_session_start),
2001 if (ret < 0 || (size_t) ret >= buflen - len)
2009 static void ieee802_1x_finished(struct hostapd_data *hapd,
2010 struct sta_info *sta, int success)
2014 /* TODO: get PMKLifetime from WPA parameters */
2015 static const int dot11RSNAConfigPMKLifetime = 43200;
2017 key = ieee802_1x_get_key(sta->eapol_sm, &len);
2018 if (success && key && len >= PMK_LEN &&
2019 wpa_auth_pmksa_add(sta->wpa_sm, key, dot11RSNAConfigPMKLifetime,
2020 sta->eapol_sm) == 0) {
2021 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
2022 HOSTAPD_LEVEL_DEBUG,
2023 "Added PMKSA cache entry (IEEE 802.1X)");