1 /*
2 * hostapd / IEEE 802.1X-2004 Authenticator
3 * Copyright (c) 2002-2011, Jouni Malinen <j@w1.fi>
4 *
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.
8 *
9 * Alternatively, this software may be distributed under the terms of BSD
10 * license.
11 *
12 * See README and COPYING for more details.
13 */
14
15 #include "utils/includes.h"
16
17 #include "utils/common.h"
18 #include "utils/eloop.h"
19 #include "crypto/md5.h"
20 #include "crypto/crypto.h"
21 #include "crypto/random.h"
22 #include "common/ieee802_11_defs.h"
23 #include "common/wpa_ctrl.h"
24 #include "radius/radius.h"
25 #include "radius/radius_client.h"
26 #include "eap_server/eap.h"
27 #include "eap_common/eap_wsc_common.h"
28 #include "eapol_auth/eapol_auth_sm.h"
29 #include "eapol_auth/eapol_auth_sm_i.h"
30 #include "hostapd.h"
31 #include "accounting.h"
32 #include "sta_info.h"
33 #include "wpa_auth.h"
34 #include "preauth_auth.h"
35 #include "pmksa_cache_auth.h"
36 #include "ap_config.h"
37 #include "ap_drv_ops.h"
38 #include "ieee802_1x.h"
39 #ifdef ANDROID_BRCM_P2P_PATCH
40 #include "p2p/p2p_i.h"
41 #endif
42
43
44 static void ieee802_1x_finished(struct hostapd_data *hapd,
45 struct sta_info *sta, int success);
46
47
ieee802_1x_send(struct hostapd_data * hapd,struct sta_info * sta,u8 type,const u8 * data,size_t datalen)48 static void ieee802_1x_send(struct hostapd_data *hapd, struct sta_info *sta,
49 u8 type, const u8 *data, size_t datalen)
50 {
51 u8 *buf;
52 struct ieee802_1x_hdr *xhdr;
53 size_t len;
54 int encrypt = 0;
55
56 len = sizeof(*xhdr) + datalen;
57 buf = os_zalloc(len);
58 if (buf == NULL) {
59 wpa_printf(MSG_ERROR, "malloc() failed for "
60 "ieee802_1x_send(len=%lu)",
61 (unsigned long) len);
62 return;
63 }
64
65 xhdr = (struct ieee802_1x_hdr *) buf;
66 xhdr->version = hapd->conf->eapol_version;
67 xhdr->type = type;
68 xhdr->length = host_to_be16(datalen);
69
70 if (datalen > 0 && data != NULL)
71 os_memcpy(xhdr + 1, data, datalen);
72
73 if (wpa_auth_pairwise_set(sta->wpa_sm))
74 encrypt = 1;
75 if (sta->flags & WLAN_STA_PREAUTH) {
76 rsn_preauth_send(hapd, sta, buf, len);
77 } else {
78 hostapd_drv_hapd_send_eapol(hapd, sta->addr, buf, len,
79 encrypt, sta->flags);
80 }
81
82 os_free(buf);
83 }
84
85
ieee802_1x_set_sta_authorized(struct hostapd_data * hapd,struct sta_info * sta,int authorized)86 void ieee802_1x_set_sta_authorized(struct hostapd_data *hapd,
87 struct sta_info *sta, int authorized)
88 {
89 int res;
90 #ifdef ANDROID_BRCM_P2P_PATCH
91 u8 *dev_addr = NULL;
92 #endif
93
94 if (sta->flags & WLAN_STA_PREAUTH)
95 return;
96
97 if (authorized) {
98 if (!ap_sta_is_authorized(sta)) {
99 #if defined(ANDROID_BRCM_P2P_PATCH) && defined(CONFIG_P2P)
100 if((dev_addr = p2p_group_get_dev_addr(hapd->p2p_group, sta->addr)))
101 wpa_msg(hapd->msg_ctx, MSG_INFO,
102 AP_STA_CONNECTED MACSTR " dev_addr="MACSTR, MAC2STR(sta->addr), MAC2STR(dev_addr));
103 else
104 #endif /*ANDROID_BRCM_P2P_PATCH*/
105 wpa_msg(hapd->msg_ctx, MSG_INFO,
106 AP_STA_CONNECTED MACSTR, MAC2STR(sta->addr));
107
108 #ifdef ANDROID_BRCM_P2P_PATCH
109 /* Sending the event to parent is required as SSL listens on parent ctrl iface */
110 if(hapd->msg_ctx_parent) {
111 if(dev_addr)
112 wpa_msg(hapd->msg_ctx_parent, MSG_INFO,
113 AP_STA_CONNECTED MACSTR " dev_addr="MACSTR, MAC2STR(sta->addr), MAC2STR(dev_addr));
114 else
115 wpa_msg(hapd->msg_ctx_parent, MSG_INFO,
116 AP_STA_CONNECTED MACSTR , MAC2STR(sta->addr));
117 }
118 #endif /* ANDROID_BRCM_P2P_PATCH */
119 }
120
121 ap_sta_set_authorized(hapd, sta, 1);
122 res = hostapd_set_authorized(hapd, sta, 1);
123 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
124 HOSTAPD_LEVEL_DEBUG, "authorizing port");
125 } else {
126 if (ap_sta_is_authorized(sta) && (sta->flags & WLAN_STA_ASSOC)) {
127 wpa_msg(hapd->msg_ctx, MSG_INFO,
128 AP_STA_DISCONNECTED MACSTR,
129 MAC2STR(sta->addr));
130 #ifdef ANDROID_BRCM_P2P_PATCH
131 if(hapd->msg_ctx_parent)
132 wpa_msg(hapd->msg_ctx_parent, MSG_INFO,
133 AP_STA_DISCONNECTED MACSTR,
134 MAC2STR(sta->addr));
135 #endif /* ANDROID_BRCM_P2P_PATCH */
136 }
137 ap_sta_set_authorized(hapd, sta, 0);
138 res = hostapd_set_authorized(hapd, sta, 0);
139 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
140 HOSTAPD_LEVEL_DEBUG, "unauthorizing port");
141 }
142
143 if (res && errno != ENOENT) {
144 printf("Could not set station " MACSTR " flags for kernel "
145 "driver (errno=%d).\n", MAC2STR(sta->addr), errno);
146 }
147
148 if (authorized)
149 accounting_sta_start(hapd, sta);
150 }
151
152
ieee802_1x_tx_key_one(struct hostapd_data * hapd,struct sta_info * sta,int idx,int broadcast,u8 * key_data,size_t key_len)153 static void ieee802_1x_tx_key_one(struct hostapd_data *hapd,
154 struct sta_info *sta,
155 int idx, int broadcast,
156 u8 *key_data, size_t key_len)
157 {
158 u8 *buf, *ekey;
159 struct ieee802_1x_hdr *hdr;
160 struct ieee802_1x_eapol_key *key;
161 size_t len, ekey_len;
162 struct eapol_state_machine *sm = sta->eapol_sm;
163
164 if (sm == NULL)
165 return;
166
167 len = sizeof(*key) + key_len;
168 buf = os_zalloc(sizeof(*hdr) + len);
169 if (buf == NULL)
170 return;
171
172 hdr = (struct ieee802_1x_hdr *) buf;
173 key = (struct ieee802_1x_eapol_key *) (hdr + 1);
174 key->type = EAPOL_KEY_TYPE_RC4;
175 key->key_length = htons(key_len);
176 wpa_get_ntp_timestamp(key->replay_counter);
177
178 if (random_get_bytes(key->key_iv, sizeof(key->key_iv))) {
179 wpa_printf(MSG_ERROR, "Could not get random numbers");
180 os_free(buf);
181 return;
182 }
183
184 key->key_index = idx | (broadcast ? 0 : BIT(7));
185 if (hapd->conf->eapol_key_index_workaround) {
186 /* According to some information, WinXP Supplicant seems to
187 * interpret bit7 as an indication whether the key is to be
188 * activated, so make it possible to enable workaround that
189 * sets this bit for all keys. */
190 key->key_index |= BIT(7);
191 }
192
193 /* Key is encrypted using "Key-IV + MSK[0..31]" as the RC4-key and
194 * MSK[32..63] is used to sign the message. */
195 if (sm->eap_if->eapKeyData == NULL || sm->eap_if->eapKeyDataLen < 64) {
196 wpa_printf(MSG_ERROR, "No eapKeyData available for encrypting "
197 "and signing EAPOL-Key");
198 os_free(buf);
199 return;
200 }
201 os_memcpy((u8 *) (key + 1), key_data, key_len);
202 ekey_len = sizeof(key->key_iv) + 32;
203 ekey = os_malloc(ekey_len);
204 if (ekey == NULL) {
205 wpa_printf(MSG_ERROR, "Could not encrypt key");
206 os_free(buf);
207 return;
208 }
209 os_memcpy(ekey, key->key_iv, sizeof(key->key_iv));
210 os_memcpy(ekey + sizeof(key->key_iv), sm->eap_if->eapKeyData, 32);
211 rc4_skip(ekey, ekey_len, 0, (u8 *) (key + 1), key_len);
212 os_free(ekey);
213
214 /* This header is needed here for HMAC-MD5, but it will be regenerated
215 * in ieee802_1x_send() */
216 hdr->version = hapd->conf->eapol_version;
217 hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
218 hdr->length = host_to_be16(len);
219 hmac_md5(sm->eap_if->eapKeyData + 32, 32, buf, sizeof(*hdr) + len,
220 key->key_signature);
221
222 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key to " MACSTR
223 " (%s index=%d)", MAC2STR(sm->addr),
224 broadcast ? "broadcast" : "unicast", idx);
225 ieee802_1x_send(hapd, sta, IEEE802_1X_TYPE_EAPOL_KEY, (u8 *) key, len);
226 if (sta->eapol_sm)
227 sta->eapol_sm->dot1xAuthEapolFramesTx++;
228 os_free(buf);
229 }
230
231
232 #ifndef CONFIG_NO_VLAN
233 static struct hostapd_wep_keys *
ieee802_1x_group_alloc(struct hostapd_data * hapd,const char * ifname)234 ieee802_1x_group_alloc(struct hostapd_data *hapd, const char *ifname)
235 {
236 struct hostapd_wep_keys *key;
237
238 key = os_zalloc(sizeof(*key));
239 if (key == NULL)
240 return NULL;
241
242 key->default_len = hapd->conf->default_wep_key_len;
243
244 if (key->idx >= hapd->conf->broadcast_key_idx_max ||
245 key->idx < hapd->conf->broadcast_key_idx_min)
246 key->idx = hapd->conf->broadcast_key_idx_min;
247 else
248 key->idx++;
249
250 if (!key->key[key->idx])
251 key->key[key->idx] = os_malloc(key->default_len);
252 if (key->key[key->idx] == NULL ||
253 random_get_bytes(key->key[key->idx], key->default_len)) {
254 printf("Could not generate random WEP key (dynamic VLAN).\n");
255 os_free(key->key[key->idx]);
256 key->key[key->idx] = NULL;
257 os_free(key);
258 return NULL;
259 }
260 key->len[key->idx] = key->default_len;
261
262 wpa_printf(MSG_DEBUG, "%s: Default WEP idx %d for dynamic VLAN\n",
263 ifname, key->idx);
264 wpa_hexdump_key(MSG_DEBUG, "Default WEP key (dynamic VLAN)",
265 key->key[key->idx], key->len[key->idx]);
266
267 if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_WEP,
268 broadcast_ether_addr, key->idx, 1,
269 NULL, 0, key->key[key->idx],
270 key->len[key->idx]))
271 printf("Could not set dynamic VLAN WEP encryption key.\n");
272
273 hostapd_set_drv_ieee8021x(hapd, ifname, 1);
274
275 return key;
276 }
277
278
279 static struct hostapd_wep_keys *
ieee802_1x_get_group(struct hostapd_data * hapd,struct hostapd_ssid * ssid,size_t vlan_id)280 ieee802_1x_get_group(struct hostapd_data *hapd, struct hostapd_ssid *ssid,
281 size_t vlan_id)
282 {
283 const char *ifname;
284
285 if (vlan_id == 0)
286 return &ssid->wep;
287
288 if (vlan_id <= ssid->max_dyn_vlan_keys && ssid->dyn_vlan_keys &&
289 ssid->dyn_vlan_keys[vlan_id])
290 return ssid->dyn_vlan_keys[vlan_id];
291
292 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Creating new group "
293 "state machine for VLAN ID %lu",
294 (unsigned long) vlan_id);
295
296 ifname = hostapd_get_vlan_id_ifname(hapd->conf->vlan, vlan_id);
297 if (ifname == NULL) {
298 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Unknown VLAN ID %lu - "
299 "cannot create group key state machine",
300 (unsigned long) vlan_id);
301 return NULL;
302 }
303
304 if (ssid->dyn_vlan_keys == NULL) {
305 int size = (vlan_id + 1) * sizeof(ssid->dyn_vlan_keys[0]);
306 ssid->dyn_vlan_keys = os_zalloc(size);
307 if (ssid->dyn_vlan_keys == NULL)
308 return NULL;
309 ssid->max_dyn_vlan_keys = vlan_id;
310 }
311
312 if (ssid->max_dyn_vlan_keys < vlan_id) {
313 struct hostapd_wep_keys **na;
314 int size = (vlan_id + 1) * sizeof(ssid->dyn_vlan_keys[0]);
315 na = os_realloc(ssid->dyn_vlan_keys, size);
316 if (na == NULL)
317 return NULL;
318 ssid->dyn_vlan_keys = na;
319 os_memset(&ssid->dyn_vlan_keys[ssid->max_dyn_vlan_keys + 1], 0,
320 (vlan_id - ssid->max_dyn_vlan_keys) *
321 sizeof(ssid->dyn_vlan_keys[0]));
322 ssid->max_dyn_vlan_keys = vlan_id;
323 }
324
325 ssid->dyn_vlan_keys[vlan_id] = ieee802_1x_group_alloc(hapd, ifname);
326
327 return ssid->dyn_vlan_keys[vlan_id];
328 }
329 #endif /* CONFIG_NO_VLAN */
330
331
ieee802_1x_tx_key(struct hostapd_data * hapd,struct sta_info * sta)332 void ieee802_1x_tx_key(struct hostapd_data *hapd, struct sta_info *sta)
333 {
334 struct eapol_authenticator *eapol = hapd->eapol_auth;
335 struct eapol_state_machine *sm = sta->eapol_sm;
336 #ifndef CONFIG_NO_VLAN
337 struct hostapd_wep_keys *key = NULL;
338 int vlan_id;
339 #endif /* CONFIG_NO_VLAN */
340
341 if (sm == NULL || !sm->eap_if->eapKeyData)
342 return;
343
344 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key(s) to " MACSTR,
345 MAC2STR(sta->addr));
346
347 #ifndef CONFIG_NO_VLAN
348 vlan_id = sta->vlan_id;
349 if (vlan_id < 0 || vlan_id > MAX_VLAN_ID)
350 vlan_id = 0;
351
352 if (vlan_id) {
353 key = ieee802_1x_get_group(hapd, sta->ssid, vlan_id);
354 if (key && key->key[key->idx])
355 ieee802_1x_tx_key_one(hapd, sta, key->idx, 1,
356 key->key[key->idx],
357 key->len[key->idx]);
358 } else
359 #endif /* CONFIG_NO_VLAN */
360 if (eapol->default_wep_key) {
361 ieee802_1x_tx_key_one(hapd, sta, eapol->default_wep_key_idx, 1,
362 eapol->default_wep_key,
363 hapd->conf->default_wep_key_len);
364 }
365
366 if (hapd->conf->individual_wep_key_len > 0) {
367 u8 *ikey;
368 ikey = os_malloc(hapd->conf->individual_wep_key_len);
369 if (ikey == NULL ||
370 random_get_bytes(ikey, hapd->conf->individual_wep_key_len))
371 {
372 wpa_printf(MSG_ERROR, "Could not generate random "
373 "individual WEP key.");
374 os_free(ikey);
375 return;
376 }
377
378 wpa_hexdump_key(MSG_DEBUG, "Individual WEP key",
379 ikey, hapd->conf->individual_wep_key_len);
380
381 ieee802_1x_tx_key_one(hapd, sta, 0, 0, ikey,
382 hapd->conf->individual_wep_key_len);
383
384 /* TODO: set encryption in TX callback, i.e., only after STA
385 * has ACKed EAPOL-Key frame */
386 if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
387 sta->addr, 0, 1, NULL, 0, ikey,
388 hapd->conf->individual_wep_key_len)) {
389 wpa_printf(MSG_ERROR, "Could not set individual WEP "
390 "encryption.");
391 }
392
393 os_free(ikey);
394 }
395 }
396
397
radius_mode_txt(struct hostapd_data * hapd)398 const char *radius_mode_txt(struct hostapd_data *hapd)
399 {
400 switch (hapd->iface->conf->hw_mode) {
401 case HOSTAPD_MODE_IEEE80211A:
402 return "802.11a";
403 case HOSTAPD_MODE_IEEE80211G:
404 return "802.11g";
405 case HOSTAPD_MODE_IEEE80211B:
406 default:
407 return "802.11b";
408 }
409 }
410
411
radius_sta_rate(struct hostapd_data * hapd,struct sta_info * sta)412 int radius_sta_rate(struct hostapd_data *hapd, struct sta_info *sta)
413 {
414 int i;
415 u8 rate = 0;
416
417 for (i = 0; i < sta->supported_rates_len; i++)
418 if ((sta->supported_rates[i] & 0x7f) > rate)
419 rate = sta->supported_rates[i] & 0x7f;
420
421 return rate;
422 }
423
424
425 #ifndef CONFIG_NO_RADIUS
ieee802_1x_learn_identity(struct hostapd_data * hapd,struct eapol_state_machine * sm,const u8 * eap,size_t len)426 static void ieee802_1x_learn_identity(struct hostapd_data *hapd,
427 struct eapol_state_machine *sm,
428 const u8 *eap, size_t len)
429 {
430 const u8 *identity;
431 size_t identity_len;
432
433 if (len <= sizeof(struct eap_hdr) ||
434 eap[sizeof(struct eap_hdr)] != EAP_TYPE_IDENTITY)
435 return;
436
437 identity = eap_get_identity(sm->eap, &identity_len);
438 if (identity == NULL)
439 return;
440
441 /* Save station identity for future RADIUS packets */
442 os_free(sm->identity);
443 sm->identity = os_malloc(identity_len + 1);
444 if (sm->identity == NULL) {
445 sm->identity_len = 0;
446 return;
447 }
448
449 os_memcpy(sm->identity, identity, identity_len);
450 sm->identity_len = identity_len;
451 sm->identity[identity_len] = '\0';
452 hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
453 HOSTAPD_LEVEL_DEBUG, "STA identity '%s'", sm->identity);
454 sm->dot1xAuthEapolRespIdFramesRx++;
455 }
456
457
ieee802_1x_encapsulate_radius(struct hostapd_data * hapd,struct sta_info * sta,const u8 * eap,size_t len)458 static void ieee802_1x_encapsulate_radius(struct hostapd_data *hapd,
459 struct sta_info *sta,
460 const u8 *eap, size_t len)
461 {
462 struct radius_msg *msg;
463 char buf[128];
464 struct eapol_state_machine *sm = sta->eapol_sm;
465
466 if (sm == NULL)
467 return;
468
469 ieee802_1x_learn_identity(hapd, sm, eap, len);
470
471 wpa_printf(MSG_DEBUG, "Encapsulating EAP message into a RADIUS "
472 "packet");
473
474 sm->radius_identifier = radius_client_get_id(hapd->radius);
475 msg = radius_msg_new(RADIUS_CODE_ACCESS_REQUEST,
476 sm->radius_identifier);
477 if (msg == NULL) {
478 printf("Could not create net RADIUS packet\n");
479 return;
480 }
481
482 radius_msg_make_authenticator(msg, (u8 *) sta, sizeof(*sta));
483
484 if (sm->identity &&
485 !radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME,
486 sm->identity, sm->identity_len)) {
487 printf("Could not add User-Name\n");
488 goto fail;
489 }
490
491 if (hapd->conf->own_ip_addr.af == AF_INET &&
492 !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS,
493 (u8 *) &hapd->conf->own_ip_addr.u.v4, 4)) {
494 printf("Could not add NAS-IP-Address\n");
495 goto fail;
496 }
497
498 #ifdef CONFIG_IPV6
499 if (hapd->conf->own_ip_addr.af == AF_INET6 &&
500 !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IPV6_ADDRESS,
501 (u8 *) &hapd->conf->own_ip_addr.u.v6, 16)) {
502 printf("Could not add NAS-IPv6-Address\n");
503 goto fail;
504 }
505 #endif /* CONFIG_IPV6 */
506
507 if (hapd->conf->nas_identifier &&
508 !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IDENTIFIER,
509 (u8 *) hapd->conf->nas_identifier,
510 os_strlen(hapd->conf->nas_identifier))) {
511 printf("Could not add NAS-Identifier\n");
512 goto fail;
513 }
514
515 if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT, sta->aid)) {
516 printf("Could not add NAS-Port\n");
517 goto fail;
518 }
519
520 os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT ":%s",
521 MAC2STR(hapd->own_addr), hapd->conf->ssid.ssid);
522 buf[sizeof(buf) - 1] = '\0';
523 if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLED_STATION_ID,
524 (u8 *) buf, os_strlen(buf))) {
525 printf("Could not add Called-Station-Id\n");
526 goto fail;
527 }
528
529 os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
530 MAC2STR(sta->addr));
531 buf[sizeof(buf) - 1] = '\0';
532 if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID,
533 (u8 *) buf, os_strlen(buf))) {
534 printf("Could not add Calling-Station-Id\n");
535 goto fail;
536 }
537
538 /* TODO: should probably check MTU from driver config; 2304 is max for
539 * IEEE 802.11, but use 1400 to avoid problems with too large packets
540 */
541 if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_FRAMED_MTU, 1400)) {
542 printf("Could not add Framed-MTU\n");
543 goto fail;
544 }
545
546 if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT_TYPE,
547 RADIUS_NAS_PORT_TYPE_IEEE_802_11)) {
548 printf("Could not add NAS-Port-Type\n");
549 goto fail;
550 }
551
552 if (sta->flags & WLAN_STA_PREAUTH) {
553 os_strlcpy(buf, "IEEE 802.11i Pre-Authentication",
554 sizeof(buf));
555 } else {
556 os_snprintf(buf, sizeof(buf), "CONNECT %d%sMbps %s",
557 radius_sta_rate(hapd, sta) / 2,
558 (radius_sta_rate(hapd, sta) & 1) ? ".5" : "",
559 radius_mode_txt(hapd));
560 buf[sizeof(buf) - 1] = '\0';
561 }
562 if (!radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO,
563 (u8 *) buf, os_strlen(buf))) {
564 printf("Could not add Connect-Info\n");
565 goto fail;
566 }
567
568 if (eap && !radius_msg_add_eap(msg, eap, len)) {
569 printf("Could not add EAP-Message\n");
570 goto fail;
571 }
572
573 /* State attribute must be copied if and only if this packet is
574 * Access-Request reply to the previous Access-Challenge */
575 if (sm->last_recv_radius &&
576 radius_msg_get_hdr(sm->last_recv_radius)->code ==
577 RADIUS_CODE_ACCESS_CHALLENGE) {
578 int res = radius_msg_copy_attr(msg, sm->last_recv_radius,
579 RADIUS_ATTR_STATE);
580 if (res < 0) {
581 printf("Could not copy State attribute from previous "
582 "Access-Challenge\n");
583 goto fail;
584 }
585 if (res > 0) {
586 wpa_printf(MSG_DEBUG, "Copied RADIUS State Attribute");
587 }
588 }
589
590 if (radius_client_send(hapd->radius, msg, RADIUS_AUTH, sta->addr) < 0)
591 goto fail;
592
593 return;
594
595 fail:
596 radius_msg_free(msg);
597 }
598 #endif /* CONFIG_NO_RADIUS */
599
600
handle_eap_response(struct hostapd_data * hapd,struct sta_info * sta,struct eap_hdr * eap,size_t len)601 static void handle_eap_response(struct hostapd_data *hapd,
602 struct sta_info *sta, struct eap_hdr *eap,
603 size_t len)
604 {
605 u8 type, *data;
606 struct eapol_state_machine *sm = sta->eapol_sm;
607 if (sm == NULL)
608 return;
609
610 data = (u8 *) (eap + 1);
611
612 if (len < sizeof(*eap) + 1) {
613 printf("handle_eap_response: too short response data\n");
614 return;
615 }
616
617 sm->eap_type_supp = type = data[0];
618
619 hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
620 HOSTAPD_LEVEL_DEBUG, "received EAP packet (code=%d "
621 "id=%d len=%d) from STA: EAP Response-%s (%d)",
622 eap->code, eap->identifier, be_to_host16(eap->length),
623 eap_server_get_name(0, type), type);
624
625 sm->dot1xAuthEapolRespFramesRx++;
626
627 wpabuf_free(sm->eap_if->eapRespData);
628 sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len);
629 sm->eapolEap = TRUE;
630 }
631
632
633 /* Process incoming EAP packet from Supplicant */
handle_eap(struct hostapd_data * hapd,struct sta_info * sta,u8 * buf,size_t len)634 static void handle_eap(struct hostapd_data *hapd, struct sta_info *sta,
635 u8 *buf, size_t len)
636 {
637 struct eap_hdr *eap;
638 u16 eap_len;
639
640 if (len < sizeof(*eap)) {
641 printf(" too short EAP packet\n");
642 return;
643 }
644
645 eap = (struct eap_hdr *) buf;
646
647 eap_len = be_to_host16(eap->length);
648 wpa_printf(MSG_DEBUG, "EAP: code=%d identifier=%d length=%d",
649 eap->code, eap->identifier, eap_len);
650 if (eap_len < sizeof(*eap)) {
651 wpa_printf(MSG_DEBUG, " Invalid EAP length");
652 return;
653 } else if (eap_len > len) {
654 wpa_printf(MSG_DEBUG, " Too short frame to contain this EAP "
655 "packet");
656 return;
657 } else if (eap_len < len) {
658 wpa_printf(MSG_DEBUG, " Ignoring %lu extra bytes after EAP "
659 "packet", (unsigned long) len - eap_len);
660 }
661
662 switch (eap->code) {
663 case EAP_CODE_REQUEST:
664 wpa_printf(MSG_DEBUG, " (request)");
665 return;
666 case EAP_CODE_RESPONSE:
667 wpa_printf(MSG_DEBUG, " (response)");
668 handle_eap_response(hapd, sta, eap, eap_len);
669 break;
670 case EAP_CODE_SUCCESS:
671 wpa_printf(MSG_DEBUG, " (success)");
672 return;
673 case EAP_CODE_FAILURE:
674 wpa_printf(MSG_DEBUG, " (failure)");
675 return;
676 default:
677 wpa_printf(MSG_DEBUG, " (unknown code)");
678 return;
679 }
680 }
681
682
683 static struct eapol_state_machine *
ieee802_1x_alloc_eapol_sm(struct hostapd_data * hapd,struct sta_info * sta)684 ieee802_1x_alloc_eapol_sm(struct hostapd_data *hapd, struct sta_info *sta)
685 {
686 int flags = 0;
687 if (sta->flags & WLAN_STA_PREAUTH)
688 flags |= EAPOL_SM_PREAUTH;
689 if (sta->wpa_sm) {
690 flags |= EAPOL_SM_USES_WPA;
691 if (wpa_auth_sta_get_pmksa(sta->wpa_sm))
692 flags |= EAPOL_SM_FROM_PMKSA_CACHE;
693 }
694 return eapol_auth_alloc(hapd->eapol_auth, sta->addr, flags,
695 sta->wps_ie, sta->p2p_ie, sta);
696 }
697
698
699 /**
700 * ieee802_1x_receive - Process the EAPOL frames from the Supplicant
701 * @hapd: hostapd BSS data
702 * @sa: Source address (sender of the EAPOL frame)
703 * @buf: EAPOL frame
704 * @len: Length of buf in octets
705 *
706 * This function is called for each incoming EAPOL frame from the interface
707 */
ieee802_1x_receive(struct hostapd_data * hapd,const u8 * sa,const u8 * buf,size_t len)708 void ieee802_1x_receive(struct hostapd_data *hapd, const u8 *sa, const u8 *buf,
709 size_t len)
710 {
711 struct sta_info *sta;
712 struct ieee802_1x_hdr *hdr;
713 struct ieee802_1x_eapol_key *key;
714 u16 datalen;
715 struct rsn_pmksa_cache_entry *pmksa;
716 int key_mgmt;
717
718 if (!hapd->conf->ieee802_1x && !hapd->conf->wpa &&
719 !hapd->conf->wps_state)
720 return;
721
722 wpa_printf(MSG_DEBUG, "IEEE 802.1X: %lu bytes from " MACSTR,
723 (unsigned long) len, MAC2STR(sa));
724 sta = ap_get_sta(hapd, sa);
725 if (!sta || !(sta->flags & (WLAN_STA_ASSOC | WLAN_STA_PREAUTH))) {
726 wpa_printf(MSG_DEBUG, "IEEE 802.1X data frame from not "
727 "associated/Pre-authenticating STA");
728 return;
729 }
730
731 if (len < sizeof(*hdr)) {
732 printf(" too short IEEE 802.1X packet\n");
733 return;
734 }
735
736 hdr = (struct ieee802_1x_hdr *) buf;
737 datalen = be_to_host16(hdr->length);
738 wpa_printf(MSG_DEBUG, " IEEE 802.1X: version=%d type=%d length=%d",
739 hdr->version, hdr->type, datalen);
740
741 if (len - sizeof(*hdr) < datalen) {
742 printf(" frame too short for this IEEE 802.1X packet\n");
743 if (sta->eapol_sm)
744 sta->eapol_sm->dot1xAuthEapLengthErrorFramesRx++;
745 return;
746 }
747 if (len - sizeof(*hdr) > datalen) {
748 wpa_printf(MSG_DEBUG, " ignoring %lu extra octets after "
749 "IEEE 802.1X packet",
750 (unsigned long) len - sizeof(*hdr) - datalen);
751 }
752
753 if (sta->eapol_sm) {
754 sta->eapol_sm->dot1xAuthLastEapolFrameVersion = hdr->version;
755 sta->eapol_sm->dot1xAuthEapolFramesRx++;
756 }
757
758 key = (struct ieee802_1x_eapol_key *) (hdr + 1);
759 if (datalen >= sizeof(struct ieee802_1x_eapol_key) &&
760 hdr->type == IEEE802_1X_TYPE_EAPOL_KEY &&
761 (key->type == EAPOL_KEY_TYPE_WPA ||
762 key->type == EAPOL_KEY_TYPE_RSN)) {
763 wpa_receive(hapd->wpa_auth, sta->wpa_sm, (u8 *) hdr,
764 sizeof(*hdr) + datalen);
765 return;
766 }
767
768 if (!hapd->conf->ieee802_1x &&
769 !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) {
770 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore EAPOL message - "
771 "802.1X not enabled and WPS not used");
772 return;
773 }
774
775 key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm);
776 if (key_mgmt != -1 && wpa_key_mgmt_wpa_psk(key_mgmt)) {
777 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore EAPOL message - "
778 "STA is using PSK");
779 return;
780 }
781
782 if (!sta->eapol_sm) {
783 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
784 if (!sta->eapol_sm)
785 return;
786
787 #ifdef CONFIG_WPS
788 if (!hapd->conf->ieee802_1x &&
789 ((sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) ==
790 WLAN_STA_MAYBE_WPS)) {
791 /*
792 * Delay EAPOL frame transmission until a possible WPS
793 * STA initiates the handshake with EAPOL-Start.
794 */
795 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
796 }
797 #endif /* CONFIG_WPS */
798
799 sta->eapol_sm->eap_if->portEnabled = TRUE;
800 }
801
802 /* since we support version 1, we can ignore version field and proceed
803 * as specified in version 1 standard [IEEE Std 802.1X-2001, 7.5.5] */
804 /* TODO: actually, we are not version 1 anymore.. However, Version 2
805 * does not change frame contents, so should be ok to process frames
806 * more or less identically. Some changes might be needed for
807 * verification of fields. */
808
809 switch (hdr->type) {
810 case IEEE802_1X_TYPE_EAP_PACKET:
811 handle_eap(hapd, sta, (u8 *) (hdr + 1), datalen);
812 break;
813
814 case IEEE802_1X_TYPE_EAPOL_START:
815 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
816 HOSTAPD_LEVEL_DEBUG, "received EAPOL-Start "
817 "from STA");
818 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
819 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
820 if (pmksa) {
821 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
822 HOSTAPD_LEVEL_DEBUG, "cached PMKSA "
823 "available - ignore it since "
824 "STA sent EAPOL-Start");
825 wpa_auth_sta_clear_pmksa(sta->wpa_sm, pmksa);
826 }
827 sta->eapol_sm->eapolStart = TRUE;
828 sta->eapol_sm->dot1xAuthEapolStartFramesRx++;
829 eap_server_clear_identity(sta->eapol_sm->eap);
830 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
831 break;
832
833 case IEEE802_1X_TYPE_EAPOL_LOGOFF:
834 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
835 HOSTAPD_LEVEL_DEBUG, "received EAPOL-Logoff "
836 "from STA");
837 sta->acct_terminate_cause =
838 RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
839 accounting_sta_stop(hapd, sta);
840 sta->eapol_sm->eapolLogoff = TRUE;
841 sta->eapol_sm->dot1xAuthEapolLogoffFramesRx++;
842 eap_server_clear_identity(sta->eapol_sm->eap);
843 break;
844
845 case IEEE802_1X_TYPE_EAPOL_KEY:
846 wpa_printf(MSG_DEBUG, " EAPOL-Key");
847 if (!ap_sta_is_authorized(sta)) {
848 wpa_printf(MSG_DEBUG, " Dropped key data from "
849 "unauthorized Supplicant");
850 break;
851 }
852 break;
853
854 case IEEE802_1X_TYPE_EAPOL_ENCAPSULATED_ASF_ALERT:
855 wpa_printf(MSG_DEBUG, " EAPOL-Encapsulated-ASF-Alert");
856 /* TODO: implement support for this; show data */
857 break;
858
859 default:
860 wpa_printf(MSG_DEBUG, " unknown IEEE 802.1X packet type");
861 sta->eapol_sm->dot1xAuthInvalidEapolFramesRx++;
862 break;
863 }
864
865 eapol_auth_step(sta->eapol_sm);
866 }
867
868
869 /**
870 * ieee802_1x_new_station - Start IEEE 802.1X authentication
871 * @hapd: hostapd BSS data
872 * @sta: The station
873 *
874 * This function is called to start IEEE 802.1X authentication when a new
875 * station completes IEEE 802.11 association.
876 */
ieee802_1x_new_station(struct hostapd_data * hapd,struct sta_info * sta)877 void ieee802_1x_new_station(struct hostapd_data *hapd, struct sta_info *sta)
878 {
879 struct rsn_pmksa_cache_entry *pmksa;
880 int reassoc = 1;
881 int force_1x = 0;
882 int key_mgmt;
883
884 #ifdef CONFIG_WPS
885 if (hapd->conf->wps_state && hapd->conf->wpa &&
886 (sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) {
887 /*
888 * Need to enable IEEE 802.1X/EAPOL state machines for possible
889 * WPS handshake even if IEEE 802.1X/EAPOL is not used for
890 * authentication in this BSS.
891 */
892 force_1x = 1;
893 }
894 #endif /* CONFIG_WPS */
895
896 if (!force_1x && !hapd->conf->ieee802_1x) {
897 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - "
898 "802.1X not enabled or forced for WPS");
899 return;
900 }
901
902 key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm);
903 if (key_mgmt != -1 && wpa_key_mgmt_wpa_psk(key_mgmt)) {
904 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - using PSK");
905 return;
906 }
907
908 if (sta->eapol_sm == NULL) {
909 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
910 HOSTAPD_LEVEL_DEBUG, "start authentication");
911 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
912 if (sta->eapol_sm == NULL) {
913 hostapd_logger(hapd, sta->addr,
914 HOSTAPD_MODULE_IEEE8021X,
915 HOSTAPD_LEVEL_INFO,
916 "failed to allocate state machine");
917 return;
918 }
919 reassoc = 0;
920 }
921
922 #ifdef CONFIG_WPS
923 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
924 if (!hapd->conf->ieee802_1x && !(sta->flags & WLAN_STA_WPS)) {
925 /*
926 * Delay EAPOL frame transmission until a possible WPS
927 * initiates the handshake with EAPOL-Start.
928 */
929 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
930 }
931 #endif /* CONFIG_WPS */
932
933 sta->eapol_sm->eap_if->portEnabled = TRUE;
934
935 #ifdef CONFIG_IEEE80211R
936 if (sta->auth_alg == WLAN_AUTH_FT) {
937 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
938 HOSTAPD_LEVEL_DEBUG,
939 "PMK from FT - skip IEEE 802.1X/EAP");
940 /* Setup EAPOL state machines to already authenticated state
941 * because of existing FT information from R0KH. */
942 sta->eapol_sm->keyRun = TRUE;
943 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
944 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
945 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
946 sta->eapol_sm->authSuccess = TRUE;
947 if (sta->eapol_sm->eap)
948 eap_sm_notify_cached(sta->eapol_sm->eap);
949 /* TODO: get vlan_id from R0KH using RRB message */
950 return;
951 }
952 #endif /* CONFIG_IEEE80211R */
953
954 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
955 if (pmksa) {
956 int old_vlanid;
957
958 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
959 HOSTAPD_LEVEL_DEBUG,
960 "PMK from PMKSA cache - skip IEEE 802.1X/EAP");
961 /* Setup EAPOL state machines to already authenticated state
962 * because of existing PMKSA information in the cache. */
963 sta->eapol_sm->keyRun = TRUE;
964 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
965 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
966 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
967 sta->eapol_sm->authSuccess = TRUE;
968 if (sta->eapol_sm->eap)
969 eap_sm_notify_cached(sta->eapol_sm->eap);
970 old_vlanid = sta->vlan_id;
971 pmksa_cache_to_eapol_data(pmksa, sta->eapol_sm);
972 if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
973 sta->vlan_id = 0;
974 ap_sta_bind_vlan(hapd, sta, old_vlanid);
975 } else {
976 if (reassoc) {
977 /*
978 * Force EAPOL state machines to start
979 * re-authentication without having to wait for the
980 * Supplicant to send EAPOL-Start.
981 */
982 sta->eapol_sm->reAuthenticate = TRUE;
983 }
984 eapol_auth_step(sta->eapol_sm);
985 }
986 }
987
988
ieee802_1x_free_station(struct sta_info * sta)989 void ieee802_1x_free_station(struct sta_info *sta)
990 {
991 struct eapol_state_machine *sm = sta->eapol_sm;
992
993 if (sm == NULL)
994 return;
995
996 sta->eapol_sm = NULL;
997
998 #ifndef CONFIG_NO_RADIUS
999 radius_msg_free(sm->last_recv_radius);
1000 radius_free_class(&sm->radius_class);
1001 #endif /* CONFIG_NO_RADIUS */
1002
1003 os_free(sm->identity);
1004 eapol_auth_free(sm);
1005 }
1006
1007
1008 #ifndef CONFIG_NO_RADIUS
ieee802_1x_decapsulate_radius(struct hostapd_data * hapd,struct sta_info * sta)1009 static void ieee802_1x_decapsulate_radius(struct hostapd_data *hapd,
1010 struct sta_info *sta)
1011 {
1012 u8 *eap;
1013 size_t len;
1014 struct eap_hdr *hdr;
1015 int eap_type = -1;
1016 char buf[64];
1017 struct radius_msg *msg;
1018 struct eapol_state_machine *sm = sta->eapol_sm;
1019
1020 if (sm == NULL || sm->last_recv_radius == NULL) {
1021 if (sm)
1022 sm->eap_if->aaaEapNoReq = TRUE;
1023 return;
1024 }
1025
1026 msg = sm->last_recv_radius;
1027
1028 eap = radius_msg_get_eap(msg, &len);
1029 if (eap == NULL) {
1030 /* RFC 3579, Chap. 2.6.3:
1031 * RADIUS server SHOULD NOT send Access-Reject/no EAP-Message
1032 * attribute */
1033 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1034 HOSTAPD_LEVEL_WARNING, "could not extract "
1035 "EAP-Message from RADIUS message");
1036 sm->eap_if->aaaEapNoReq = TRUE;
1037 return;
1038 }
1039
1040 if (len < sizeof(*hdr)) {
1041 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1042 HOSTAPD_LEVEL_WARNING, "too short EAP packet "
1043 "received from authentication server");
1044 os_free(eap);
1045 sm->eap_if->aaaEapNoReq = TRUE;
1046 return;
1047 }
1048
1049 if (len > sizeof(*hdr))
1050 eap_type = eap[sizeof(*hdr)];
1051
1052 hdr = (struct eap_hdr *) eap;
1053 switch (hdr->code) {
1054 case EAP_CODE_REQUEST:
1055 if (eap_type >= 0)
1056 sm->eap_type_authsrv = eap_type;
1057 os_snprintf(buf, sizeof(buf), "EAP-Request-%s (%d)",
1058 eap_type >= 0 ? eap_server_get_name(0, eap_type) :
1059 "??",
1060 eap_type);
1061 break;
1062 case EAP_CODE_RESPONSE:
1063 os_snprintf(buf, sizeof(buf), "EAP Response-%s (%d)",
1064 eap_type >= 0 ? eap_server_get_name(0, eap_type) :
1065 "??",
1066 eap_type);
1067 break;
1068 case EAP_CODE_SUCCESS:
1069 os_strlcpy(buf, "EAP Success", sizeof(buf));
1070 break;
1071 case EAP_CODE_FAILURE:
1072 os_strlcpy(buf, "EAP Failure", sizeof(buf));
1073 break;
1074 default:
1075 os_strlcpy(buf, "unknown EAP code", sizeof(buf));
1076 break;
1077 }
1078 buf[sizeof(buf) - 1] = '\0';
1079 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1080 HOSTAPD_LEVEL_DEBUG, "decapsulated EAP packet (code=%d "
1081 "id=%d len=%d) from RADIUS server: %s",
1082 hdr->code, hdr->identifier, be_to_host16(hdr->length),
1083 buf);
1084 sm->eap_if->aaaEapReq = TRUE;
1085
1086 wpabuf_free(sm->eap_if->aaaEapReqData);
1087 sm->eap_if->aaaEapReqData = wpabuf_alloc_ext_data(eap, len);
1088 }
1089
1090
ieee802_1x_get_keys(struct hostapd_data * hapd,struct sta_info * sta,struct radius_msg * msg,struct radius_msg * req,const u8 * shared_secret,size_t shared_secret_len)1091 static void ieee802_1x_get_keys(struct hostapd_data *hapd,
1092 struct sta_info *sta, struct radius_msg *msg,
1093 struct radius_msg *req,
1094 const u8 *shared_secret,
1095 size_t shared_secret_len)
1096 {
1097 struct radius_ms_mppe_keys *keys;
1098 struct eapol_state_machine *sm = sta->eapol_sm;
1099 if (sm == NULL)
1100 return;
1101
1102 keys = radius_msg_get_ms_keys(msg, req, shared_secret,
1103 shared_secret_len);
1104
1105 if (keys && keys->send && keys->recv) {
1106 size_t len = keys->send_len + keys->recv_len;
1107 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Send-Key",
1108 keys->send, keys->send_len);
1109 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Recv-Key",
1110 keys->recv, keys->recv_len);
1111
1112 os_free(sm->eap_if->aaaEapKeyData);
1113 sm->eap_if->aaaEapKeyData = os_malloc(len);
1114 if (sm->eap_if->aaaEapKeyData) {
1115 os_memcpy(sm->eap_if->aaaEapKeyData, keys->recv,
1116 keys->recv_len);
1117 os_memcpy(sm->eap_if->aaaEapKeyData + keys->recv_len,
1118 keys->send, keys->send_len);
1119 sm->eap_if->aaaEapKeyDataLen = len;
1120 sm->eap_if->aaaEapKeyAvailable = TRUE;
1121 }
1122 }
1123
1124 if (keys) {
1125 os_free(keys->send);
1126 os_free(keys->recv);
1127 os_free(keys);
1128 }
1129 }
1130
1131
ieee802_1x_store_radius_class(struct hostapd_data * hapd,struct sta_info * sta,struct radius_msg * msg)1132 static void ieee802_1x_store_radius_class(struct hostapd_data *hapd,
1133 struct sta_info *sta,
1134 struct radius_msg *msg)
1135 {
1136 u8 *class;
1137 size_t class_len;
1138 struct eapol_state_machine *sm = sta->eapol_sm;
1139 int count, i;
1140 struct radius_attr_data *nclass;
1141 size_t nclass_count;
1142
1143 if (!hapd->conf->radius->acct_server || hapd->radius == NULL ||
1144 sm == NULL)
1145 return;
1146
1147 radius_free_class(&sm->radius_class);
1148 count = radius_msg_count_attr(msg, RADIUS_ATTR_CLASS, 1);
1149 if (count <= 0)
1150 return;
1151
1152 nclass = os_zalloc(count * sizeof(struct radius_attr_data));
1153 if (nclass == NULL)
1154 return;
1155
1156 nclass_count = 0;
1157
1158 class = NULL;
1159 for (i = 0; i < count; i++) {
1160 do {
1161 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CLASS,
1162 &class, &class_len,
1163 class) < 0) {
1164 i = count;
1165 break;
1166 }
1167 } while (class_len < 1);
1168
1169 nclass[nclass_count].data = os_malloc(class_len);
1170 if (nclass[nclass_count].data == NULL)
1171 break;
1172
1173 os_memcpy(nclass[nclass_count].data, class, class_len);
1174 nclass[nclass_count].len = class_len;
1175 nclass_count++;
1176 }
1177
1178 sm->radius_class.attr = nclass;
1179 sm->radius_class.count = nclass_count;
1180 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Stored %lu RADIUS Class "
1181 "attributes for " MACSTR,
1182 (unsigned long) sm->radius_class.count,
1183 MAC2STR(sta->addr));
1184 }
1185
1186
1187 /* Update sta->identity based on User-Name attribute in Access-Accept */
ieee802_1x_update_sta_identity(struct hostapd_data * hapd,struct sta_info * sta,struct radius_msg * msg)1188 static void ieee802_1x_update_sta_identity(struct hostapd_data *hapd,
1189 struct sta_info *sta,
1190 struct radius_msg *msg)
1191 {
1192 u8 *buf, *identity;
1193 size_t len;
1194 struct eapol_state_machine *sm = sta->eapol_sm;
1195
1196 if (sm == NULL)
1197 return;
1198
1199 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_USER_NAME, &buf, &len,
1200 NULL) < 0)
1201 return;
1202
1203 identity = os_malloc(len + 1);
1204 if (identity == NULL)
1205 return;
1206
1207 os_memcpy(identity, buf, len);
1208 identity[len] = '\0';
1209
1210 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1211 HOSTAPD_LEVEL_DEBUG, "old identity '%s' updated with "
1212 "User-Name from Access-Accept '%s'",
1213 sm->identity ? (char *) sm->identity : "N/A",
1214 (char *) identity);
1215
1216 os_free(sm->identity);
1217 sm->identity = identity;
1218 sm->identity_len = len;
1219 }
1220
1221
1222 struct sta_id_search {
1223 u8 identifier;
1224 struct eapol_state_machine *sm;
1225 };
1226
1227
ieee802_1x_select_radius_identifier(struct hostapd_data * hapd,struct sta_info * sta,void * ctx)1228 static int ieee802_1x_select_radius_identifier(struct hostapd_data *hapd,
1229 struct sta_info *sta,
1230 void *ctx)
1231 {
1232 struct sta_id_search *id_search = ctx;
1233 struct eapol_state_machine *sm = sta->eapol_sm;
1234
1235 if (sm && sm->radius_identifier >= 0 &&
1236 sm->radius_identifier == id_search->identifier) {
1237 id_search->sm = sm;
1238 return 1;
1239 }
1240 return 0;
1241 }
1242
1243
1244 static struct eapol_state_machine *
ieee802_1x_search_radius_identifier(struct hostapd_data * hapd,u8 identifier)1245 ieee802_1x_search_radius_identifier(struct hostapd_data *hapd, u8 identifier)
1246 {
1247 struct sta_id_search id_search;
1248 id_search.identifier = identifier;
1249 id_search.sm = NULL;
1250 ap_for_each_sta(hapd, ieee802_1x_select_radius_identifier, &id_search);
1251 return id_search.sm;
1252 }
1253
1254
1255 /**
1256 * ieee802_1x_receive_auth - Process RADIUS frames from Authentication Server
1257 * @msg: RADIUS response message
1258 * @req: RADIUS request message
1259 * @shared_secret: RADIUS shared secret
1260 * @shared_secret_len: Length of shared_secret in octets
1261 * @data: Context data (struct hostapd_data *)
1262 * Returns: Processing status
1263 */
1264 static RadiusRxResult
ieee802_1x_receive_auth(struct radius_msg * msg,struct radius_msg * req,const u8 * shared_secret,size_t shared_secret_len,void * data)1265 ieee802_1x_receive_auth(struct radius_msg *msg, struct radius_msg *req,
1266 const u8 *shared_secret, size_t shared_secret_len,
1267 void *data)
1268 {
1269 struct hostapd_data *hapd = data;
1270 struct sta_info *sta;
1271 u32 session_timeout = 0, termination_action, acct_interim_interval;
1272 int session_timeout_set, old_vlanid = 0;
1273 struct eapol_state_machine *sm;
1274 int override_eapReq = 0;
1275 struct radius_hdr *hdr = radius_msg_get_hdr(msg);
1276
1277 sm = ieee802_1x_search_radius_identifier(hapd, hdr->identifier);
1278 if (sm == NULL) {
1279 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Could not find matching "
1280 "station for this RADIUS message");
1281 return RADIUS_RX_UNKNOWN;
1282 }
1283 sta = sm->sta;
1284
1285 /* RFC 2869, Ch. 5.13: valid Message-Authenticator attribute MUST be
1286 * present when packet contains an EAP-Message attribute */
1287 if (hdr->code == RADIUS_CODE_ACCESS_REJECT &&
1288 radius_msg_get_attr(msg, RADIUS_ATTR_MESSAGE_AUTHENTICATOR, NULL,
1289 0) < 0 &&
1290 radius_msg_get_attr(msg, RADIUS_ATTR_EAP_MESSAGE, NULL, 0) < 0) {
1291 wpa_printf(MSG_DEBUG, "Allowing RADIUS Access-Reject without "
1292 "Message-Authenticator since it does not include "
1293 "EAP-Message");
1294 } else if (radius_msg_verify(msg, shared_secret, shared_secret_len,
1295 req, 1)) {
1296 printf("Incoming RADIUS packet did not have correct "
1297 "Message-Authenticator - dropped\n");
1298 return RADIUS_RX_INVALID_AUTHENTICATOR;
1299 }
1300
1301 if (hdr->code != RADIUS_CODE_ACCESS_ACCEPT &&
1302 hdr->code != RADIUS_CODE_ACCESS_REJECT &&
1303 hdr->code != RADIUS_CODE_ACCESS_CHALLENGE) {
1304 printf("Unknown RADIUS message code\n");
1305 return RADIUS_RX_UNKNOWN;
1306 }
1307
1308 sm->radius_identifier = -1;
1309 wpa_printf(MSG_DEBUG, "RADIUS packet matching with station " MACSTR,
1310 MAC2STR(sta->addr));
1311
1312 radius_msg_free(sm->last_recv_radius);
1313 sm->last_recv_radius = msg;
1314
1315 session_timeout_set =
1316 !radius_msg_get_attr_int32(msg, RADIUS_ATTR_SESSION_TIMEOUT,
1317 &session_timeout);
1318 if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_TERMINATION_ACTION,
1319 &termination_action))
1320 termination_action = RADIUS_TERMINATION_ACTION_DEFAULT;
1321
1322 if (hapd->conf->acct_interim_interval == 0 &&
1323 hdr->code == RADIUS_CODE_ACCESS_ACCEPT &&
1324 radius_msg_get_attr_int32(msg, RADIUS_ATTR_ACCT_INTERIM_INTERVAL,
1325 &acct_interim_interval) == 0) {
1326 if (acct_interim_interval < 60) {
1327 hostapd_logger(hapd, sta->addr,
1328 HOSTAPD_MODULE_IEEE8021X,
1329 HOSTAPD_LEVEL_INFO,
1330 "ignored too small "
1331 "Acct-Interim-Interval %d",
1332 acct_interim_interval);
1333 } else
1334 sta->acct_interim_interval = acct_interim_interval;
1335 }
1336
1337
1338 switch (hdr->code) {
1339 case RADIUS_CODE_ACCESS_ACCEPT:
1340 if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
1341 sta->vlan_id = 0;
1342 #ifndef CONFIG_NO_VLAN
1343 else {
1344 old_vlanid = sta->vlan_id;
1345 sta->vlan_id = radius_msg_get_vlanid(msg);
1346 }
1347 if (sta->vlan_id > 0 &&
1348 hostapd_get_vlan_id_ifname(hapd->conf->vlan,
1349 sta->vlan_id)) {
1350 hostapd_logger(hapd, sta->addr,
1351 HOSTAPD_MODULE_RADIUS,
1352 HOSTAPD_LEVEL_INFO,
1353 "VLAN ID %d", sta->vlan_id);
1354 } else if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_REQUIRED) {
1355 sta->eapol_sm->authFail = TRUE;
1356 hostapd_logger(hapd, sta->addr,
1357 HOSTAPD_MODULE_IEEE8021X,
1358 HOSTAPD_LEVEL_INFO, "authentication "
1359 "server did not include required VLAN "
1360 "ID in Access-Accept");
1361 break;
1362 }
1363 #endif /* CONFIG_NO_VLAN */
1364
1365 if (ap_sta_bind_vlan(hapd, sta, old_vlanid) < 0)
1366 break;
1367
1368 /* RFC 3580, Ch. 3.17 */
1369 if (session_timeout_set && termination_action ==
1370 RADIUS_TERMINATION_ACTION_RADIUS_REQUEST) {
1371 sm->reAuthPeriod = session_timeout;
1372 } else if (session_timeout_set)
1373 ap_sta_session_timeout(hapd, sta, session_timeout);
1374
1375 sm->eap_if->aaaSuccess = TRUE;
1376 override_eapReq = 1;
1377 ieee802_1x_get_keys(hapd, sta, msg, req, shared_secret,
1378 shared_secret_len);
1379 ieee802_1x_store_radius_class(hapd, sta, msg);
1380 ieee802_1x_update_sta_identity(hapd, sta, msg);
1381 if (sm->eap_if->eapKeyAvailable &&
1382 wpa_auth_pmksa_add(sta->wpa_sm, sm->eapol_key_crypt,
1383 session_timeout_set ?
1384 (int) session_timeout : -1, sm) == 0) {
1385 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
1386 HOSTAPD_LEVEL_DEBUG,
1387 "Added PMKSA cache entry");
1388 }
1389 break;
1390 case RADIUS_CODE_ACCESS_REJECT:
1391 sm->eap_if->aaaFail = TRUE;
1392 override_eapReq = 1;
1393 break;
1394 case RADIUS_CODE_ACCESS_CHALLENGE:
1395 sm->eap_if->aaaEapReq = TRUE;
1396 if (session_timeout_set) {
1397 /* RFC 2869, Ch. 2.3.2; RFC 3580, Ch. 3.17 */
1398 sm->eap_if->aaaMethodTimeout = session_timeout;
1399 hostapd_logger(hapd, sm->addr,
1400 HOSTAPD_MODULE_IEEE8021X,
1401 HOSTAPD_LEVEL_DEBUG,
1402 "using EAP timeout of %d seconds (from "
1403 "RADIUS)",
1404 sm->eap_if->aaaMethodTimeout);
1405 } else {
1406 /*
1407 * Use dynamic retransmission behavior per EAP
1408 * specification.
1409 */
1410 sm->eap_if->aaaMethodTimeout = 0;
1411 }
1412 break;
1413 }
1414
1415 ieee802_1x_decapsulate_radius(hapd, sta);
1416 if (override_eapReq)
1417 sm->eap_if->aaaEapReq = FALSE;
1418
1419 eapol_auth_step(sm);
1420
1421 return RADIUS_RX_QUEUED;
1422 }
1423 #endif /* CONFIG_NO_RADIUS */
1424
1425
ieee802_1x_abort_auth(struct hostapd_data * hapd,struct sta_info * sta)1426 void ieee802_1x_abort_auth(struct hostapd_data *hapd, struct sta_info *sta)
1427 {
1428 struct eapol_state_machine *sm = sta->eapol_sm;
1429 if (sm == NULL)
1430 return;
1431
1432 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1433 HOSTAPD_LEVEL_DEBUG, "aborting authentication");
1434
1435 #ifndef CONFIG_NO_RADIUS
1436 radius_msg_free(sm->last_recv_radius);
1437 sm->last_recv_radius = NULL;
1438 #endif /* CONFIG_NO_RADIUS */
1439
1440 if (sm->eap_if->eapTimeout) {
1441 /*
1442 * Disconnect the STA since it did not reply to the last EAP
1443 * request and we cannot continue EAP processing (EAP-Failure
1444 * could only be sent if the EAP peer actually replied).
1445 */
1446 sm->eap_if->portEnabled = FALSE;
1447 ap_sta_disconnect(hapd, sta, sta->addr,
1448 WLAN_REASON_PREV_AUTH_NOT_VALID);
1449 }
1450 }
1451
1452
ieee802_1x_rekey_broadcast(struct hostapd_data * hapd)1453 static int ieee802_1x_rekey_broadcast(struct hostapd_data *hapd)
1454 {
1455 struct eapol_authenticator *eapol = hapd->eapol_auth;
1456
1457 if (hapd->conf->default_wep_key_len < 1)
1458 return 0;
1459
1460 os_free(eapol->default_wep_key);
1461 eapol->default_wep_key = os_malloc(hapd->conf->default_wep_key_len);
1462 if (eapol->default_wep_key == NULL ||
1463 random_get_bytes(eapol->default_wep_key,
1464 hapd->conf->default_wep_key_len)) {
1465 printf("Could not generate random WEP key.\n");
1466 os_free(eapol->default_wep_key);
1467 eapol->default_wep_key = NULL;
1468 return -1;
1469 }
1470
1471 wpa_hexdump_key(MSG_DEBUG, "IEEE 802.1X: New default WEP key",
1472 eapol->default_wep_key,
1473 hapd->conf->default_wep_key_len);
1474
1475 return 0;
1476 }
1477
1478
ieee802_1x_sta_key_available(struct hostapd_data * hapd,struct sta_info * sta,void * ctx)1479 static int ieee802_1x_sta_key_available(struct hostapd_data *hapd,
1480 struct sta_info *sta, void *ctx)
1481 {
1482 if (sta->eapol_sm) {
1483 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
1484 eapol_auth_step(sta->eapol_sm);
1485 }
1486 return 0;
1487 }
1488
1489
ieee802_1x_rekey(void * eloop_ctx,void * timeout_ctx)1490 static void ieee802_1x_rekey(void *eloop_ctx, void *timeout_ctx)
1491 {
1492 struct hostapd_data *hapd = eloop_ctx;
1493 struct eapol_authenticator *eapol = hapd->eapol_auth;
1494
1495 if (eapol->default_wep_key_idx >= 3)
1496 eapol->default_wep_key_idx =
1497 hapd->conf->individual_wep_key_len > 0 ? 1 : 0;
1498 else
1499 eapol->default_wep_key_idx++;
1500
1501 wpa_printf(MSG_DEBUG, "IEEE 802.1X: New default WEP key index %d",
1502 eapol->default_wep_key_idx);
1503
1504 if (ieee802_1x_rekey_broadcast(hapd)) {
1505 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1506 HOSTAPD_LEVEL_WARNING, "failed to generate a "
1507 "new broadcast key");
1508 os_free(eapol->default_wep_key);
1509 eapol->default_wep_key = NULL;
1510 return;
1511 }
1512
1513 /* TODO: Could setup key for RX here, but change default TX keyid only
1514 * after new broadcast key has been sent to all stations. */
1515 if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
1516 broadcast_ether_addr,
1517 eapol->default_wep_key_idx, 1, NULL, 0,
1518 eapol->default_wep_key,
1519 hapd->conf->default_wep_key_len)) {
1520 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1521 HOSTAPD_LEVEL_WARNING, "failed to configure a "
1522 "new broadcast key");
1523 os_free(eapol->default_wep_key);
1524 eapol->default_wep_key = NULL;
1525 return;
1526 }
1527
1528 ap_for_each_sta(hapd, ieee802_1x_sta_key_available, NULL);
1529
1530 if (hapd->conf->wep_rekeying_period > 0) {
1531 eloop_register_timeout(hapd->conf->wep_rekeying_period, 0,
1532 ieee802_1x_rekey, hapd, NULL);
1533 }
1534 }
1535
1536
ieee802_1x_eapol_send(void * ctx,void * sta_ctx,u8 type,const u8 * data,size_t datalen)1537 static void ieee802_1x_eapol_send(void *ctx, void *sta_ctx, u8 type,
1538 const u8 *data, size_t datalen)
1539 {
1540 #ifdef CONFIG_WPS
1541 struct sta_info *sta = sta_ctx;
1542
1543 if ((sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) ==
1544 WLAN_STA_MAYBE_WPS) {
1545 const u8 *identity;
1546 size_t identity_len;
1547 struct eapol_state_machine *sm = sta->eapol_sm;
1548
1549 identity = eap_get_identity(sm->eap, &identity_len);
1550 if (identity &&
1551 ((identity_len == WSC_ID_ENROLLEE_LEN &&
1552 os_memcmp(identity, WSC_ID_ENROLLEE,
1553 WSC_ID_ENROLLEE_LEN) == 0) ||
1554 (identity_len == WSC_ID_REGISTRAR_LEN &&
1555 os_memcmp(identity, WSC_ID_REGISTRAR,
1556 WSC_ID_REGISTRAR_LEN) == 0))) {
1557 wpa_printf(MSG_DEBUG, "WPS: WLAN_STA_MAYBE_WPS -> "
1558 "WLAN_STA_WPS");
1559 sta->flags |= WLAN_STA_WPS;
1560 }
1561 }
1562 #endif /* CONFIG_WPS */
1563
1564 ieee802_1x_send(ctx, sta_ctx, type, data, datalen);
1565 }
1566
1567
ieee802_1x_aaa_send(void * ctx,void * sta_ctx,const u8 * data,size_t datalen)1568 static void ieee802_1x_aaa_send(void *ctx, void *sta_ctx,
1569 const u8 *data, size_t datalen)
1570 {
1571 #ifndef CONFIG_NO_RADIUS
1572 struct hostapd_data *hapd = ctx;
1573 struct sta_info *sta = sta_ctx;
1574
1575 ieee802_1x_encapsulate_radius(hapd, sta, data, datalen);
1576 #endif /* CONFIG_NO_RADIUS */
1577 }
1578
1579
_ieee802_1x_finished(void * ctx,void * sta_ctx,int success,int preauth)1580 static void _ieee802_1x_finished(void *ctx, void *sta_ctx, int success,
1581 int preauth)
1582 {
1583 struct hostapd_data *hapd = ctx;
1584 struct sta_info *sta = sta_ctx;
1585 if (preauth)
1586 rsn_preauth_finished(hapd, sta, success);
1587 else
1588 ieee802_1x_finished(hapd, sta, success);
1589 }
1590
1591
ieee802_1x_get_eap_user(void * ctx,const u8 * identity,size_t identity_len,int phase2,struct eap_user * user)1592 static int ieee802_1x_get_eap_user(void *ctx, const u8 *identity,
1593 size_t identity_len, int phase2,
1594 struct eap_user *user)
1595 {
1596 struct hostapd_data *hapd = ctx;
1597 const struct hostapd_eap_user *eap_user;
1598 int i, count;
1599
1600 eap_user = hostapd_get_eap_user(hapd->conf, identity,
1601 identity_len, phase2);
1602 if (eap_user == NULL)
1603 return -1;
1604
1605 os_memset(user, 0, sizeof(*user));
1606 user->phase2 = phase2;
1607 count = EAP_USER_MAX_METHODS;
1608 if (count > EAP_MAX_METHODS)
1609 count = EAP_MAX_METHODS;
1610 for (i = 0; i < count; i++) {
1611 user->methods[i].vendor = eap_user->methods[i].vendor;
1612 user->methods[i].method = eap_user->methods[i].method;
1613 }
1614
1615 if (eap_user->password) {
1616 user->password = os_malloc(eap_user->password_len);
1617 if (user->password == NULL)
1618 return -1;
1619 os_memcpy(user->password, eap_user->password,
1620 eap_user->password_len);
1621 user->password_len = eap_user->password_len;
1622 }
1623 user->force_version = eap_user->force_version;
1624 user->ttls_auth = eap_user->ttls_auth;
1625
1626 return 0;
1627 }
1628
1629
ieee802_1x_sta_entry_alive(void * ctx,const u8 * addr)1630 static int ieee802_1x_sta_entry_alive(void *ctx, const u8 *addr)
1631 {
1632 struct hostapd_data *hapd = ctx;
1633 struct sta_info *sta;
1634 sta = ap_get_sta(hapd, addr);
1635 if (sta == NULL || sta->eapol_sm == NULL)
1636 return 0;
1637 return 1;
1638 }
1639
1640
ieee802_1x_logger(void * ctx,const u8 * addr,eapol_logger_level level,const char * txt)1641 static void ieee802_1x_logger(void *ctx, const u8 *addr,
1642 eapol_logger_level level, const char *txt)
1643 {
1644 #ifndef CONFIG_NO_HOSTAPD_LOGGER
1645 struct hostapd_data *hapd = ctx;
1646 int hlevel;
1647
1648 switch (level) {
1649 case EAPOL_LOGGER_WARNING:
1650 hlevel = HOSTAPD_LEVEL_WARNING;
1651 break;
1652 case EAPOL_LOGGER_INFO:
1653 hlevel = HOSTAPD_LEVEL_INFO;
1654 break;
1655 case EAPOL_LOGGER_DEBUG:
1656 default:
1657 hlevel = HOSTAPD_LEVEL_DEBUG;
1658 break;
1659 }
1660
1661 hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE8021X, hlevel, "%s",
1662 txt);
1663 #endif /* CONFIG_NO_HOSTAPD_LOGGER */
1664 }
1665
1666
ieee802_1x_set_port_authorized(void * ctx,void * sta_ctx,int authorized)1667 static void ieee802_1x_set_port_authorized(void *ctx, void *sta_ctx,
1668 int authorized)
1669 {
1670 struct hostapd_data *hapd = ctx;
1671 struct sta_info *sta = sta_ctx;
1672 ieee802_1x_set_sta_authorized(hapd, sta, authorized);
1673 }
1674
1675
_ieee802_1x_abort_auth(void * ctx,void * sta_ctx)1676 static void _ieee802_1x_abort_auth(void *ctx, void *sta_ctx)
1677 {
1678 struct hostapd_data *hapd = ctx;
1679 struct sta_info *sta = sta_ctx;
1680 ieee802_1x_abort_auth(hapd, sta);
1681 }
1682
1683
_ieee802_1x_tx_key(void * ctx,void * sta_ctx)1684 static void _ieee802_1x_tx_key(void *ctx, void *sta_ctx)
1685 {
1686 struct hostapd_data *hapd = ctx;
1687 struct sta_info *sta = sta_ctx;
1688 ieee802_1x_tx_key(hapd, sta);
1689 }
1690
1691
ieee802_1x_eapol_event(void * ctx,void * sta_ctx,enum eapol_event type)1692 static void ieee802_1x_eapol_event(void *ctx, void *sta_ctx,
1693 enum eapol_event type)
1694 {
1695 /* struct hostapd_data *hapd = ctx; */
1696 struct sta_info *sta = sta_ctx;
1697 switch (type) {
1698 case EAPOL_AUTH_SM_CHANGE:
1699 wpa_auth_sm_notify(sta->wpa_sm);
1700 break;
1701 case EAPOL_AUTH_REAUTHENTICATE:
1702 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
1703 break;
1704 }
1705 }
1706
1707
ieee802_1x_init(struct hostapd_data * hapd)1708 int ieee802_1x_init(struct hostapd_data *hapd)
1709 {
1710 int i;
1711 struct eapol_auth_config conf;
1712 struct eapol_auth_cb cb;
1713
1714 os_memset(&conf, 0, sizeof(conf));
1715 conf.ctx = hapd;
1716 conf.eap_reauth_period = hapd->conf->eap_reauth_period;
1717 conf.wpa = hapd->conf->wpa;
1718 conf.individual_wep_key_len = hapd->conf->individual_wep_key_len;
1719 conf.eap_server = hapd->conf->eap_server;
1720 conf.ssl_ctx = hapd->ssl_ctx;
1721 conf.msg_ctx = hapd->msg_ctx;
1722 conf.eap_sim_db_priv = hapd->eap_sim_db_priv;
1723 conf.eap_req_id_text = hapd->conf->eap_req_id_text;
1724 conf.eap_req_id_text_len = hapd->conf->eap_req_id_text_len;
1725 conf.pac_opaque_encr_key = hapd->conf->pac_opaque_encr_key;
1726 conf.eap_fast_a_id = hapd->conf->eap_fast_a_id;
1727 conf.eap_fast_a_id_len = hapd->conf->eap_fast_a_id_len;
1728 conf.eap_fast_a_id_info = hapd->conf->eap_fast_a_id_info;
1729 conf.eap_fast_prov = hapd->conf->eap_fast_prov;
1730 conf.pac_key_lifetime = hapd->conf->pac_key_lifetime;
1731 conf.pac_key_refresh_time = hapd->conf->pac_key_refresh_time;
1732 conf.eap_sim_aka_result_ind = hapd->conf->eap_sim_aka_result_ind;
1733 conf.tnc = hapd->conf->tnc;
1734 conf.wps = hapd->wps;
1735 conf.fragment_size = hapd->conf->fragment_size;
1736 conf.pwd_group = hapd->conf->pwd_group;
1737 conf.pbc_in_m1 = hapd->conf->pbc_in_m1;
1738
1739 os_memset(&cb, 0, sizeof(cb));
1740 cb.eapol_send = ieee802_1x_eapol_send;
1741 cb.aaa_send = ieee802_1x_aaa_send;
1742 cb.finished = _ieee802_1x_finished;
1743 cb.get_eap_user = ieee802_1x_get_eap_user;
1744 cb.sta_entry_alive = ieee802_1x_sta_entry_alive;
1745 cb.logger = ieee802_1x_logger;
1746 cb.set_port_authorized = ieee802_1x_set_port_authorized;
1747 cb.abort_auth = _ieee802_1x_abort_auth;
1748 cb.tx_key = _ieee802_1x_tx_key;
1749 cb.eapol_event = ieee802_1x_eapol_event;
1750
1751 hapd->eapol_auth = eapol_auth_init(&conf, &cb);
1752 if (hapd->eapol_auth == NULL)
1753 return -1;
1754
1755 if ((hapd->conf->ieee802_1x || hapd->conf->wpa) &&
1756 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 1))
1757 return -1;
1758
1759 #ifndef CONFIG_NO_RADIUS
1760 if (radius_client_register(hapd->radius, RADIUS_AUTH,
1761 ieee802_1x_receive_auth, hapd))
1762 return -1;
1763 #endif /* CONFIG_NO_RADIUS */
1764
1765 if (hapd->conf->default_wep_key_len) {
1766 for (i = 0; i < 4; i++)
1767 hostapd_drv_set_key(hapd->conf->iface, hapd,
1768 WPA_ALG_NONE, NULL, i, 0, NULL, 0,
1769 NULL, 0);
1770
1771 ieee802_1x_rekey(hapd, NULL);
1772
1773 if (hapd->eapol_auth->default_wep_key == NULL)
1774 return -1;
1775 }
1776
1777 return 0;
1778 }
1779
1780
ieee802_1x_deinit(struct hostapd_data * hapd)1781 void ieee802_1x_deinit(struct hostapd_data *hapd)
1782 {
1783 eloop_cancel_timeout(ieee802_1x_rekey, hapd, NULL);
1784
1785 if (hapd->driver != NULL &&
1786 (hapd->conf->ieee802_1x || hapd->conf->wpa))
1787 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0);
1788
1789 eapol_auth_deinit(hapd->eapol_auth);
1790 hapd->eapol_auth = NULL;
1791 }
1792
1793
ieee802_1x_tx_status(struct hostapd_data * hapd,struct sta_info * sta,const u8 * buf,size_t len,int ack)1794 int ieee802_1x_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
1795 const u8 *buf, size_t len, int ack)
1796 {
1797 struct ieee80211_hdr *hdr;
1798 struct ieee802_1x_hdr *xhdr;
1799 struct ieee802_1x_eapol_key *key;
1800 u8 *pos;
1801 const unsigned char rfc1042_hdr[ETH_ALEN] =
1802 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
1803
1804 if (sta == NULL)
1805 return -1;
1806 if (len < sizeof(*hdr) + sizeof(rfc1042_hdr) + 2 + sizeof(*xhdr))
1807 return 0;
1808
1809 hdr = (struct ieee80211_hdr *) buf;
1810 pos = (u8 *) (hdr + 1);
1811 if (os_memcmp(pos, rfc1042_hdr, sizeof(rfc1042_hdr)) != 0)
1812 return 0;
1813 pos += sizeof(rfc1042_hdr);
1814 if (WPA_GET_BE16(pos) != ETH_P_PAE)
1815 return 0;
1816 pos += 2;
1817
1818 xhdr = (struct ieee802_1x_hdr *) pos;
1819 pos += sizeof(*xhdr);
1820
1821 wpa_printf(MSG_DEBUG, "IEEE 802.1X: " MACSTR " TX status - version=%d "
1822 "type=%d length=%d - ack=%d",
1823 MAC2STR(sta->addr), xhdr->version, xhdr->type,
1824 be_to_host16(xhdr->length), ack);
1825
1826 if (xhdr->type == IEEE802_1X_TYPE_EAPOL_KEY &&
1827 pos + sizeof(struct wpa_eapol_key) <= buf + len) {
1828 const struct wpa_eapol_key *wpa;
1829 wpa = (const struct wpa_eapol_key *) pos;
1830 if (wpa->type == EAPOL_KEY_TYPE_RSN ||
1831 wpa->type == EAPOL_KEY_TYPE_WPA)
1832 wpa_auth_eapol_key_tx_status(hapd->wpa_auth,
1833 sta->wpa_sm, ack);
1834 }
1835
1836 /* EAPOL EAP-Packet packets are eventually re-sent by either Supplicant
1837 * or Authenticator state machines, but EAPOL-Key packets are not
1838 * retransmitted in case of failure. Try to re-sent failed EAPOL-Key
1839 * packets couple of times because otherwise STA keys become
1840 * unsynchronized with AP. */
1841 if (xhdr->type == IEEE802_1X_TYPE_EAPOL_KEY && !ack &&
1842 pos + sizeof(*key) <= buf + len) {
1843 key = (struct ieee802_1x_eapol_key *) pos;
1844 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1845 HOSTAPD_LEVEL_DEBUG, "did not Ack EAPOL-Key "
1846 "frame (%scast index=%d)",
1847 key->key_index & BIT(7) ? "uni" : "broad",
1848 key->key_index & ~BIT(7));
1849 /* TODO: re-send EAPOL-Key couple of times (with short delay
1850 * between them?). If all attempt fail, report error and
1851 * deauthenticate STA so that it will get new keys when
1852 * authenticating again (e.g., after returning in range).
1853 * Separate limit/transmit state needed both for unicast and
1854 * broadcast keys(?) */
1855 }
1856 /* TODO: could move unicast key configuration from ieee802_1x_tx_key()
1857 * to here and change the key only if the EAPOL-Key packet was Acked.
1858 */
1859
1860 return 1;
1861 }
1862
1863
ieee802_1x_get_identity(struct eapol_state_machine * sm,size_t * len)1864 u8 * ieee802_1x_get_identity(struct eapol_state_machine *sm, size_t *len)
1865 {
1866 if (sm == NULL || sm->identity == NULL)
1867 return NULL;
1868
1869 *len = sm->identity_len;
1870 return sm->identity;
1871 }
1872
1873
ieee802_1x_get_radius_class(struct eapol_state_machine * sm,size_t * len,int idx)1874 u8 * ieee802_1x_get_radius_class(struct eapol_state_machine *sm, size_t *len,
1875 int idx)
1876 {
1877 if (sm == NULL || sm->radius_class.attr == NULL ||
1878 idx >= (int) sm->radius_class.count)
1879 return NULL;
1880
1881 *len = sm->radius_class.attr[idx].len;
1882 return sm->radius_class.attr[idx].data;
1883 }
1884
1885
ieee802_1x_get_key(struct eapol_state_machine * sm,size_t * len)1886 const u8 * ieee802_1x_get_key(struct eapol_state_machine *sm, size_t *len)
1887 {
1888 *len = 0;
1889 if (sm == NULL)
1890 return NULL;
1891
1892 *len = sm->eap_if->eapKeyDataLen;
1893 return sm->eap_if->eapKeyData;
1894 }
1895
1896
ieee802_1x_notify_port_enabled(struct eapol_state_machine * sm,int enabled)1897 void ieee802_1x_notify_port_enabled(struct eapol_state_machine *sm,
1898 int enabled)
1899 {
1900 if (sm == NULL)
1901 return;
1902 sm->eap_if->portEnabled = enabled ? TRUE : FALSE;
1903 eapol_auth_step(sm);
1904 }
1905
1906
ieee802_1x_notify_port_valid(struct eapol_state_machine * sm,int valid)1907 void ieee802_1x_notify_port_valid(struct eapol_state_machine *sm,
1908 int valid)
1909 {
1910 if (sm == NULL)
1911 return;
1912 sm->portValid = valid ? TRUE : FALSE;
1913 eapol_auth_step(sm);
1914 }
1915
1916
ieee802_1x_notify_pre_auth(struct eapol_state_machine * sm,int pre_auth)1917 void ieee802_1x_notify_pre_auth(struct eapol_state_machine *sm, int pre_auth)
1918 {
1919 if (sm == NULL)
1920 return;
1921 if (pre_auth)
1922 sm->flags |= EAPOL_SM_PREAUTH;
1923 else
1924 sm->flags &= ~EAPOL_SM_PREAUTH;
1925 }
1926
1927
bool_txt(Boolean bool)1928 static const char * bool_txt(Boolean bool)
1929 {
1930 return bool ? "TRUE" : "FALSE";
1931 }
1932
1933
ieee802_1x_get_mib(struct hostapd_data * hapd,char * buf,size_t buflen)1934 int ieee802_1x_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
1935 {
1936 /* TODO */
1937 return 0;
1938 }
1939
1940
ieee802_1x_get_mib_sta(struct hostapd_data * hapd,struct sta_info * sta,char * buf,size_t buflen)1941 int ieee802_1x_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
1942 char *buf, size_t buflen)
1943 {
1944 int len = 0, ret;
1945 struct eapol_state_machine *sm = sta->eapol_sm;
1946
1947 if (sm == NULL)
1948 return 0;
1949
1950 ret = os_snprintf(buf + len, buflen - len,
1951 "dot1xPaePortNumber=%d\n"
1952 "dot1xPaePortProtocolVersion=%d\n"
1953 "dot1xPaePortCapabilities=1\n"
1954 "dot1xPaePortInitialize=%d\n"
1955 "dot1xPaePortReauthenticate=FALSE\n",
1956 sta->aid,
1957 EAPOL_VERSION,
1958 sm->initialize);
1959 if (ret < 0 || (size_t) ret >= buflen - len)
1960 return len;
1961 len += ret;
1962
1963 /* dot1xAuthConfigTable */
1964 ret = os_snprintf(buf + len, buflen - len,
1965 "dot1xAuthPaeState=%d\n"
1966 "dot1xAuthBackendAuthState=%d\n"
1967 "dot1xAuthAdminControlledDirections=%d\n"
1968 "dot1xAuthOperControlledDirections=%d\n"
1969 "dot1xAuthAuthControlledPortStatus=%d\n"
1970 "dot1xAuthAuthControlledPortControl=%d\n"
1971 "dot1xAuthQuietPeriod=%u\n"
1972 "dot1xAuthServerTimeout=%u\n"
1973 "dot1xAuthReAuthPeriod=%u\n"
1974 "dot1xAuthReAuthEnabled=%s\n"
1975 "dot1xAuthKeyTxEnabled=%s\n",
1976 sm->auth_pae_state + 1,
1977 sm->be_auth_state + 1,
1978 sm->adminControlledDirections,
1979 sm->operControlledDirections,
1980 sm->authPortStatus,
1981 sm->portControl,
1982 sm->quietPeriod,
1983 sm->serverTimeout,
1984 sm->reAuthPeriod,
1985 bool_txt(sm->reAuthEnabled),
1986 bool_txt(sm->keyTxEnabled));
1987 if (ret < 0 || (size_t) ret >= buflen - len)
1988 return len;
1989 len += ret;
1990
1991 /* dot1xAuthStatsTable */
1992 ret = os_snprintf(buf + len, buflen - len,
1993 "dot1xAuthEapolFramesRx=%u\n"
1994 "dot1xAuthEapolFramesTx=%u\n"
1995 "dot1xAuthEapolStartFramesRx=%u\n"
1996 "dot1xAuthEapolLogoffFramesRx=%u\n"
1997 "dot1xAuthEapolRespIdFramesRx=%u\n"
1998 "dot1xAuthEapolRespFramesRx=%u\n"
1999 "dot1xAuthEapolReqIdFramesTx=%u\n"
2000 "dot1xAuthEapolReqFramesTx=%u\n"
2001 "dot1xAuthInvalidEapolFramesRx=%u\n"
2002 "dot1xAuthEapLengthErrorFramesRx=%u\n"
2003 "dot1xAuthLastEapolFrameVersion=%u\n"
2004 "dot1xAuthLastEapolFrameSource=" MACSTR "\n",
2005 sm->dot1xAuthEapolFramesRx,
2006 sm->dot1xAuthEapolFramesTx,
2007 sm->dot1xAuthEapolStartFramesRx,
2008 sm->dot1xAuthEapolLogoffFramesRx,
2009 sm->dot1xAuthEapolRespIdFramesRx,
2010 sm->dot1xAuthEapolRespFramesRx,
2011 sm->dot1xAuthEapolReqIdFramesTx,
2012 sm->dot1xAuthEapolReqFramesTx,
2013 sm->dot1xAuthInvalidEapolFramesRx,
2014 sm->dot1xAuthEapLengthErrorFramesRx,
2015 sm->dot1xAuthLastEapolFrameVersion,
2016 MAC2STR(sm->addr));
2017 if (ret < 0 || (size_t) ret >= buflen - len)
2018 return len;
2019 len += ret;
2020
2021 /* dot1xAuthDiagTable */
2022 ret = os_snprintf(buf + len, buflen - len,
2023 "dot1xAuthEntersConnecting=%u\n"
2024 "dot1xAuthEapLogoffsWhileConnecting=%u\n"
2025 "dot1xAuthEntersAuthenticating=%u\n"
2026 "dot1xAuthAuthSuccessesWhileAuthenticating=%u\n"
2027 "dot1xAuthAuthTimeoutsWhileAuthenticating=%u\n"
2028 "dot1xAuthAuthFailWhileAuthenticating=%u\n"
2029 "dot1xAuthAuthEapStartsWhileAuthenticating=%u\n"
2030 "dot1xAuthAuthEapLogoffWhileAuthenticating=%u\n"
2031 "dot1xAuthAuthReauthsWhileAuthenticated=%u\n"
2032 "dot1xAuthAuthEapStartsWhileAuthenticated=%u\n"
2033 "dot1xAuthAuthEapLogoffWhileAuthenticated=%u\n"
2034 "dot1xAuthBackendResponses=%u\n"
2035 "dot1xAuthBackendAccessChallenges=%u\n"
2036 "dot1xAuthBackendOtherRequestsToSupplicant=%u\n"
2037 "dot1xAuthBackendAuthSuccesses=%u\n"
2038 "dot1xAuthBackendAuthFails=%u\n",
2039 sm->authEntersConnecting,
2040 sm->authEapLogoffsWhileConnecting,
2041 sm->authEntersAuthenticating,
2042 sm->authAuthSuccessesWhileAuthenticating,
2043 sm->authAuthTimeoutsWhileAuthenticating,
2044 sm->authAuthFailWhileAuthenticating,
2045 sm->authAuthEapStartsWhileAuthenticating,
2046 sm->authAuthEapLogoffWhileAuthenticating,
2047 sm->authAuthReauthsWhileAuthenticated,
2048 sm->authAuthEapStartsWhileAuthenticated,
2049 sm->authAuthEapLogoffWhileAuthenticated,
2050 sm->backendResponses,
2051 sm->backendAccessChallenges,
2052 sm->backendOtherRequestsToSupplicant,
2053 sm->backendAuthSuccesses,
2054 sm->backendAuthFails);
2055 if (ret < 0 || (size_t) ret >= buflen - len)
2056 return len;
2057 len += ret;
2058
2059 /* dot1xAuthSessionStatsTable */
2060 ret = os_snprintf(buf + len, buflen - len,
2061 /* TODO: dot1xAuthSessionOctetsRx */
2062 /* TODO: dot1xAuthSessionOctetsTx */
2063 /* TODO: dot1xAuthSessionFramesRx */
2064 /* TODO: dot1xAuthSessionFramesTx */
2065 "dot1xAuthSessionId=%08X-%08X\n"
2066 "dot1xAuthSessionAuthenticMethod=%d\n"
2067 "dot1xAuthSessionTime=%u\n"
2068 "dot1xAuthSessionTerminateCause=999\n"
2069 "dot1xAuthSessionUserName=%s\n",
2070 sta->acct_session_id_hi, sta->acct_session_id_lo,
2071 (wpa_key_mgmt_wpa_ieee8021x(
2072 wpa_auth_sta_key_mgmt(sta->wpa_sm))) ?
2073 1 : 2,
2074 (unsigned int) (time(NULL) -
2075 sta->acct_session_start),
2076 sm->identity);
2077 if (ret < 0 || (size_t) ret >= buflen - len)
2078 return len;
2079 len += ret;
2080
2081 return len;
2082 }
2083
2084
ieee802_1x_finished(struct hostapd_data * hapd,struct sta_info * sta,int success)2085 static void ieee802_1x_finished(struct hostapd_data *hapd,
2086 struct sta_info *sta, int success)
2087 {
2088 const u8 *key;
2089 size_t len;
2090 /* TODO: get PMKLifetime from WPA parameters */
2091 static const int dot11RSNAConfigPMKLifetime = 43200;
2092
2093 key = ieee802_1x_get_key(sta->eapol_sm, &len);
2094 if (success && key && len >= PMK_LEN &&
2095 wpa_auth_pmksa_add(sta->wpa_sm, key, dot11RSNAConfigPMKLifetime,
2096 sta->eapol_sm) == 0) {
2097 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
2098 HOSTAPD_LEVEL_DEBUG,
2099 "Added PMKSA cache entry (IEEE 802.1X)");
2100 }
2101
2102 #ifdef CONFIG_WPS
2103 if (!success && (sta->flags & WLAN_STA_WPS)) {
2104 /*
2105 * Many devices require deauthentication after WPS provisioning
2106 * and some may not be be able to do that themselves, so
2107 * disconnect the client here.
2108 */
2109 wpa_printf(MSG_DEBUG, "WPS: Force disconnection after "
2110 "EAP-Failure");
2111 /* Add a small sleep to increase likelihood of previously
2112 * requested EAP-Failure TX getting out before this should the
2113 * driver reorder operations.
2114 */
2115 os_sleep(0, 10000);
2116 ap_sta_disconnect(hapd, sta, sta->addr,
2117 WLAN_REASON_PREV_AUTH_NOT_VALID);
2118 }
2119 #endif /* CONFIG_WPS */
2120 }
2121