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Move generic AP functionality implementation into src/ap
[thirdparty/hostap.git] / src / ap / ieee802_1x.c
CommitLineData
6fc6879b
JM		 1/*
2 * hostapd / IEEE 802.1X-2004 Authenticator
45cefa0b 3 * Copyright (c) 2002-2009, Jouni Malinen <j@w1.fi>
6fc6879b
JM		 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 "includes.h"
16
4dbfe5c5 17#include "common.h"
03da66bd
JM		 18#include "eloop.h"
19#include "crypto/md5.h"
20#include "crypto/crypto.h"
21#include "common/ieee802_11_defs.h"
22#include "common/wpa_ctrl.h"
6fc6879b
JM		 23#include "radius/radius.h"
24#include "radius/radius_client.h"
281c950b 25#include "eapol_auth/eapol_auth_sm.h"
e0e14a7b 26#include "eapol_auth/eapol_auth_sm_i.h"
03da66bd
JM		 27#include "hostapd.h"
28#include "ieee802_1x.h"
29#include "accounting.h"
6fc6879b
JM		 30#include "sta_info.h"
31#include "wpa.h"
32#include "preauth.h"
33#include "pmksa_cache.h"
45cefa0b 34#include "config.h"
6fc6879b
JM		 35#include "eap_server/eap.h"
36
37
38static void ieee802_1x_finished(struct hostapd_data *hapd,
39 struct sta_info *sta, int success);
40
41
42static void ieee802_1x_send(struct hostapd_data *hapd, struct sta_info *sta,
43 u8 type, const u8 *data, size_t datalen)
44{
45 u8 *buf;
46 struct ieee802_1x_hdr *xhdr;
47 size_t len;
48 int encrypt = 0;
49
50 len = sizeof(*xhdr) + datalen;
51 buf = os_zalloc(len);
52 if (buf == NULL) {
53 wpa_printf(MSG_ERROR, "malloc() failed for "
54 "ieee802_1x_send(len=%lu)",
55 (unsigned long) len);
56 return;
57 }
58
59 xhdr = (struct ieee802_1x_hdr *) buf;
60 xhdr->version = hapd->conf->eapol_version;
61 xhdr->type = type;
62 xhdr->length = host_to_be16(datalen);
63
64 if (datalen > 0 && data != NULL)
65 os_memcpy(xhdr + 1, data, datalen);
66
67 if (wpa_auth_pairwise_set(sta->wpa_sm))
68 encrypt = 1;
69 if (sta->flags & WLAN_STA_PREAUTH) {
70 rsn_preauth_send(hapd, sta, buf, len);
71 } else {
45cefa0b 72 hapd->drv.send_eapol(hapd, sta->addr, buf, len, encrypt);
6fc6879b
JM		 73 }
74
75 os_free(buf);
76}
77
78
79void ieee802_1x_set_sta_authorized(struct hostapd_data *hapd,
80 struct sta_info *sta, int authorized)
81{
82 int res;
83
84 if (sta->flags & WLAN_STA_PREAUTH)
85 return;
86
87 if (authorized) {
20bd9547
JM		 88 if (!(sta->flags & WLAN_STA_AUTHORIZED))
89 wpa_msg(hapd->msg_ctx, MSG_INFO,
90 AP_STA_CONNECTED MACSTR, MAC2STR(sta->addr));
6fc6879b 91 sta->flags |= WLAN_STA_AUTHORIZED;
45cefa0b 92 res = hapd->drv.set_authorized(hapd, sta, 1);
6fc6879b
JM		 93 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
94 HOSTAPD_LEVEL_DEBUG, "authorizing port");
95 } else {
20bd9547
JM		 96 if ((sta->flags & (WLAN_STA_AUTHORIZED | WLAN_STA_ASSOC)) ==
97 (WLAN_STA_AUTHORIZED | WLAN_STA_ASSOC))
98 wpa_msg(hapd->msg_ctx, MSG_INFO,
99 AP_STA_DISCONNECTED MACSTR,
100 MAC2STR(sta->addr));
6fc6879b 101 sta->flags &= ~WLAN_STA_AUTHORIZED;
45cefa0b 102 res = hapd->drv.set_authorized(hapd, sta, 0);
6fc6879b
JM		 103 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
104 HOSTAPD_LEVEL_DEBUG, "unauthorizing port");
105 }
106
107 if (res && errno != ENOENT) {
108 printf("Could not set station " MACSTR " flags for kernel "
109 "driver (errno=%d).\n", MAC2STR(sta->addr), errno);
110 }
111
112 if (authorized)
113 accounting_sta_start(hapd, sta);
114}
115
116
6fc6879b
JM		 117static void ieee802_1x_tx_key_one(struct hostapd_data *hapd,
118 struct sta_info *sta,
119 int idx, int broadcast,
120 u8 *key_data, size_t key_len)
121{
122 u8 *buf, *ekey;
123 struct ieee802_1x_hdr *hdr;
124 struct ieee802_1x_eapol_key *key;
125 size_t len, ekey_len;
126 struct eapol_state_machine *sm = sta->eapol_sm;
127
128 if (sm == NULL)
129 return;
130
131 len = sizeof(*key) + key_len;
132 buf = os_zalloc(sizeof(*hdr) + len);
133 if (buf == NULL)
134 return;
135
136 hdr = (struct ieee802_1x_hdr *) buf;
137 key = (struct ieee802_1x_eapol_key *) (hdr + 1);
138 key->type = EAPOL_KEY_TYPE_RC4;
139 key->key_length = htons(key_len);
140 wpa_get_ntp_timestamp(key->replay_counter);
141
142 if (os_get_random(key->key_iv, sizeof(key->key_iv))) {
143 wpa_printf(MSG_ERROR, "Could not get random numbers");
144 os_free(buf);
145 return;
146 }
147
148 key->key_index = idx | (broadcast ? 0 : BIT(7));
149 if (hapd->conf->eapol_key_index_workaround) {
150 /* According to some information, WinXP Supplicant seems to
151 * interpret bit7 as an indication whether the key is to be
152 * activated, so make it possible to enable workaround that
153 * sets this bit for all keys. */
154 key->key_index |= BIT(7);
155 }
156
157 /* Key is encrypted using "Key-IV + MSK[0..31]" as the RC4-key and
158 * MSK[32..63] is used to sign the message. */
159 if (sm->eap_if->eapKeyData == NULL || sm->eap_if->eapKeyDataLen < 64) {
160 wpa_printf(MSG_ERROR, "No eapKeyData available for encrypting "
161 "and signing EAPOL-Key");
162 os_free(buf);
163 return;
164 }
165 os_memcpy((u8 *) (key + 1), key_data, key_len);
166 ekey_len = sizeof(key->key_iv) + 32;
167 ekey = os_malloc(ekey_len);
168 if (ekey == NULL) {
169 wpa_printf(MSG_ERROR, "Could not encrypt key");
170 os_free(buf);
171 return;
172 }
173 os_memcpy(ekey, key->key_iv, sizeof(key->key_iv));
174 os_memcpy(ekey + sizeof(key->key_iv), sm->eap_if->eapKeyData, 32);
8ef16831 175 rc4_skip(ekey, ekey_len, 0, (u8 *) (key + 1), key_len);
6fc6879b
JM		 176 os_free(ekey);
177
178 /* This header is needed here for HMAC-MD5, but it will be regenerated
179 * in ieee802_1x_send() */
180 hdr->version = hapd->conf->eapol_version;
181 hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
182 hdr->length = host_to_be16(len);
183 hmac_md5(sm->eap_if->eapKeyData + 32, 32, buf, sizeof(*hdr) + len,
184 key->key_signature);
185
186 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key to " MACSTR
187 " (%s index=%d)", MAC2STR(sm->addr),
188 broadcast ? "broadcast" : "unicast", idx);
189 ieee802_1x_send(hapd, sta, IEEE802_1X_TYPE_EAPOL_KEY, (u8 *) key, len);
190 if (sta->eapol_sm)
191 sta->eapol_sm->dot1xAuthEapolFramesTx++;
192 os_free(buf);
193}
194
195
30b32314 196#ifndef CONFIG_NO_VLAN
6fc6879b
JM		 197static struct hostapd_wep_keys *
198ieee802_1x_group_alloc(struct hostapd_data *hapd, const char *ifname)
199{
200 struct hostapd_wep_keys *key;
201
202 key = os_zalloc(sizeof(*key));
203 if (key == NULL)
204 return NULL;
205
206 key->default_len = hapd->conf->default_wep_key_len;
207
208 if (key->idx >= hapd->conf->broadcast_key_idx_max ||
209 key->idx < hapd->conf->broadcast_key_idx_min)
210 key->idx = hapd->conf->broadcast_key_idx_min;
211 else
212 key->idx++;
213
214 if (!key->key[key->idx])
215 key->key[key->idx] = os_malloc(key->default_len);
216 if (key->key[key->idx] == NULL ||
217 os_get_random(key->key[key->idx], key->default_len)) {
218 printf("Could not generate random WEP key (dynamic VLAN).\n");
219 os_free(key->key[key->idx]);
220 key->key[key->idx] = NULL;
221 os_free(key);
222 return NULL;
223 }
224 key->len[key->idx] = key->default_len;
225
226 wpa_printf(MSG_DEBUG, "%s: Default WEP idx %d for dynamic VLAN\n",
227 ifname, key->idx);
228 wpa_hexdump_key(MSG_DEBUG, "Default WEP key (dynamic VLAN)",
229 key->key[key->idx], key->len[key->idx]);
230
45cefa0b
JM		 231 if (hapd->drv.set_key(ifname, hapd, WPA_ALG_WEP, NULL, key->idx, 1,
232 NULL, 0, key->key[key->idx], key->len[key->idx]))
6fc6879b
JM		 233 printf("Could not set dynamic VLAN WEP encryption key.\n");
234
010401fe 235 hapd->drv.set_drv_ieee8021x(hapd, ifname, 1);
6fc6879b
JM		 236
237 return key;
238}
239
240
241static struct hostapd_wep_keys *
242ieee802_1x_get_group(struct hostapd_data *hapd, struct hostapd_ssid *ssid,
243 size_t vlan_id)
244{
245 const char *ifname;
246
247 if (vlan_id == 0)
248 return &ssid->wep;
249
250 if (vlan_id <= ssid->max_dyn_vlan_keys && ssid->dyn_vlan_keys &&
251 ssid->dyn_vlan_keys[vlan_id])
252 return ssid->dyn_vlan_keys[vlan_id];
253
254 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Creating new group "
255 "state machine for VLAN ID %lu",
256 (unsigned long) vlan_id);
257
258 ifname = hostapd_get_vlan_id_ifname(hapd->conf->vlan, vlan_id);
259 if (ifname == NULL) {
260 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Unknown VLAN ID %lu - "
261 "cannot create group key state machine",
262 (unsigned long) vlan_id);
263 return NULL;
264 }
265
266 if (ssid->dyn_vlan_keys == NULL) {
267 int size = (vlan_id + 1) * sizeof(ssid->dyn_vlan_keys[0]);
268 ssid->dyn_vlan_keys = os_zalloc(size);
269 if (ssid->dyn_vlan_keys == NULL)
270 return NULL;
271 ssid->max_dyn_vlan_keys = vlan_id;
272 }
273
274 if (ssid->max_dyn_vlan_keys < vlan_id) {
275 struct hostapd_wep_keys **na;
276 int size = (vlan_id + 1) * sizeof(ssid->dyn_vlan_keys[0]);
277 na = os_realloc(ssid->dyn_vlan_keys, size);
278 if (na == NULL)
279 return NULL;
280 ssid->dyn_vlan_keys = na;
281 os_memset(&ssid->dyn_vlan_keys[ssid->max_dyn_vlan_keys + 1], 0,
282 (vlan_id - ssid->max_dyn_vlan_keys) *
283 sizeof(ssid->dyn_vlan_keys[0]));
284 ssid->max_dyn_vlan_keys = vlan_id;
285 }
286
287 ssid->dyn_vlan_keys[vlan_id] = ieee802_1x_group_alloc(hapd, ifname);
288
289 return ssid->dyn_vlan_keys[vlan_id];
290}
30b32314 291#endif /* CONFIG_NO_VLAN */
6fc6879b
JM		 292
293
294void ieee802_1x_tx_key(struct hostapd_data *hapd, struct sta_info *sta)
295{
f55802e8 296 struct eapol_authenticator *eapol = hapd->eapol_auth;
6fc6879b 297 struct eapol_state_machine *sm = sta->eapol_sm;
30b32314
JM		 298#ifndef CONFIG_NO_VLAN
299 struct hostapd_wep_keys *key = NULL;
6fc6879b 300 int vlan_id;
30b32314 301#endif /* CONFIG_NO_VLAN */
6fc6879b
JM		 302
303 if (sm == NULL || !sm->eap_if->eapKeyData)
304 return;
305
306 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key(s) to " MACSTR,
307 MAC2STR(sta->addr));
308
30b32314 309#ifndef CONFIG_NO_VLAN
6fc6879b
JM		 310 vlan_id = sta->vlan_id;
311 if (vlan_id < 0 || vlan_id > MAX_VLAN_ID)
312 vlan_id = 0;
313
314 if (vlan_id) {
315 key = ieee802_1x_get_group(hapd, sta->ssid, vlan_id);
316 if (key && key->key[key->idx])
317 ieee802_1x_tx_key_one(hapd, sta, key->idx, 1,
318 key->key[key->idx],
319 key->len[key->idx]);
30b32314
JM		 320 } else
321#endif /* CONFIG_NO_VLAN */
f55802e8
JM		 322 if (eapol->default_wep_key) {
323 ieee802_1x_tx_key_one(hapd, sta, eapol->default_wep_key_idx, 1,
324 eapol->default_wep_key,
6fc6879b
JM		 325 hapd->conf->default_wep_key_len);
326 }
327
328 if (hapd->conf->individual_wep_key_len > 0) {
329 u8 *ikey;
330 ikey = os_malloc(hapd->conf->individual_wep_key_len);
331 if (ikey == NULL ||
332 os_get_random(ikey, hapd->conf->individual_wep_key_len)) {
333 wpa_printf(MSG_ERROR, "Could not generate random "
334 "individual WEP key.");
335 os_free(ikey);
336 return;
337 }
338
339 wpa_hexdump_key(MSG_DEBUG, "Individual WEP key",
340 ikey, hapd->conf->individual_wep_key_len);
341
342 ieee802_1x_tx_key_one(hapd, sta, 0, 0, ikey,
343 hapd->conf->individual_wep_key_len);
344
345 /* TODO: set encryption in TX callback, i.e., only after STA
346 * has ACKed EAPOL-Key frame */
45cefa0b
JM		 347 if (hapd->drv.set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
348 sta->addr, 0, 1, NULL, 0, ikey,
349 hapd->conf->individual_wep_key_len)) {
6fc6879b
JM		 350 wpa_printf(MSG_ERROR, "Could not set individual WEP "
351 "encryption.");
352 }
353
354 os_free(ikey);
355 }
356}
357
358
359const char *radius_mode_txt(struct hostapd_data *hapd)
360{
45cefa0b 361 switch (hapd->iface->conf->hw_mode) {
6fc6879b
JM		 362 case HOSTAPD_MODE_IEEE80211A:
363 return "802.11a";
364 case HOSTAPD_MODE_IEEE80211G:
365 return "802.11g";
366 case HOSTAPD_MODE_IEEE80211B:
367 default:
368 return "802.11b";
369 }
370}
371
372
373int radius_sta_rate(struct hostapd_data *hapd, struct sta_info *sta)
374{
375 int i;
376 u8 rate = 0;
377
378 for (i = 0; i < sta->supported_rates_len; i++)
379 if ((sta->supported_rates[i] & 0x7f) > rate)
380 rate = sta->supported_rates[i] & 0x7f;
381
382 return rate;
383}
384
385
f88bd288 386#ifndef CONFIG_NO_RADIUS
6fc6879b
JM		 387static void ieee802_1x_learn_identity(struct hostapd_data *hapd,
388 struct eapol_state_machine *sm,
389 const u8 *eap, size_t len)
390{
391 const u8 *identity;
392 size_t identity_len;
393
394 if (len <= sizeof(struct eap_hdr) ||
395 eap[sizeof(struct eap_hdr)] != EAP_TYPE_IDENTITY)
396 return;
397
398 identity = eap_get_identity(sm->eap, &identity_len);
399 if (identity == NULL)
400 return;
401
402 /* Save station identity for future RADIUS packets */
403 os_free(sm->identity);
404 sm->identity = os_malloc(identity_len + 1);
405 if (sm->identity == NULL) {
406 sm->identity_len = 0;
407 return;
408 }
409
410 os_memcpy(sm->identity, identity, identity_len);
411 sm->identity_len = identity_len;
412 sm->identity[identity_len] = '\0';
413 hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
414 HOSTAPD_LEVEL_DEBUG, "STA identity '%s'", sm->identity);
415 sm->dot1xAuthEapolRespIdFramesRx++;
416}
417
418
419static void ieee802_1x_encapsulate_radius(struct hostapd_data *hapd,
420 struct sta_info *sta,
421 const u8 *eap, size_t len)
422{
423 struct radius_msg *msg;
424 char buf[128];
425 struct eapol_state_machine *sm = sta->eapol_sm;
426
427 if (sm == NULL)
428 return;
429
430 ieee802_1x_learn_identity(hapd, sm, eap, len);
431
432 wpa_printf(MSG_DEBUG, "Encapsulating EAP message into a RADIUS "
433 "packet");
434
435 sm->radius_identifier = radius_client_get_id(hapd->radius);
436 msg = radius_msg_new(RADIUS_CODE_ACCESS_REQUEST,
437 sm->radius_identifier);
438 if (msg == NULL) {
439 printf("Could not create net RADIUS packet\n");
440 return;
441 }
442
443 radius_msg_make_authenticator(msg, (u8 *) sta, sizeof(*sta));
444
445 if (sm->identity &&
446 !radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME,
447 sm->identity, sm->identity_len)) {
448 printf("Could not add User-Name\n");
449 goto fail;
450 }
451
452 if (hapd->conf->own_ip_addr.af == AF_INET &&
453 !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS,
454 (u8 *) &hapd->conf->own_ip_addr.u.v4, 4)) {
455 printf("Could not add NAS-IP-Address\n");
456 goto fail;
457 }
458
459#ifdef CONFIG_IPV6
460 if (hapd->conf->own_ip_addr.af == AF_INET6 &&
461 !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IPV6_ADDRESS,
462 (u8 *) &hapd->conf->own_ip_addr.u.v6, 16)) {
463 printf("Could not add NAS-IPv6-Address\n");
464 goto fail;
465 }
466#endif /* CONFIG_IPV6 */
467
468 if (hapd->conf->nas_identifier &&
469 !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IDENTIFIER,
470 (u8 *) hapd->conf->nas_identifier,
471 os_strlen(hapd->conf->nas_identifier))) {
472 printf("Could not add NAS-Identifier\n");
473 goto fail;
474 }
475
476 if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT, sta->aid)) {
477 printf("Could not add NAS-Port\n");
478 goto fail;
479 }
480
481 os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT ":%s",
482 MAC2STR(hapd->own_addr), hapd->conf->ssid.ssid);
483 buf[sizeof(buf) - 1] = '\0';
484 if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLED_STATION_ID,
485 (u8 *) buf, os_strlen(buf))) {
486 printf("Could not add Called-Station-Id\n");
487 goto fail;
488 }
489
490 os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
491 MAC2STR(sta->addr));
492 buf[sizeof(buf) - 1] = '\0';
493 if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID,
494 (u8 *) buf, os_strlen(buf))) {
495 printf("Could not add Calling-Station-Id\n");
496 goto fail;
497 }
498
499 /* TODO: should probably check MTU from driver config; 2304 is max for
500 * IEEE 802.11, but use 1400 to avoid problems with too large packets
501 */
502 if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_FRAMED_MTU, 1400)) {
503 printf("Could not add Framed-MTU\n");
504 goto fail;
505 }
506
507 if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT_TYPE,
508 RADIUS_NAS_PORT_TYPE_IEEE_802_11)) {
509 printf("Could not add NAS-Port-Type\n");
510 goto fail;
511 }
512
513 if (sta->flags & WLAN_STA_PREAUTH) {
514 os_strlcpy(buf, "IEEE 802.11i Pre-Authentication",
515 sizeof(buf));
516 } else {
517 os_snprintf(buf, sizeof(buf), "CONNECT %d%sMbps %s",
518 radius_sta_rate(hapd, sta) / 2,
519 (radius_sta_rate(hapd, sta) & 1) ? ".5" : "",
520 radius_mode_txt(hapd));
521 buf[sizeof(buf) - 1] = '\0';
522 }
523 if (!radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO,
524 (u8 *) buf, os_strlen(buf))) {
525 printf("Could not add Connect-Info\n");
526 goto fail;
527 }
528
529 if (eap && !radius_msg_add_eap(msg, eap, len)) {
530 printf("Could not add EAP-Message\n");
531 goto fail;
532 }
533
534 /* State attribute must be copied if and only if this packet is
535 * Access-Request reply to the previous Access-Challenge */
1489e11a
JM		 536 if (sm->last_recv_radius &&
537 radius_msg_get_hdr(sm->last_recv_radius)->code ==
6fc6879b
JM		 538 RADIUS_CODE_ACCESS_CHALLENGE) {
539 int res = radius_msg_copy_attr(msg, sm->last_recv_radius,
540 RADIUS_ATTR_STATE);
541 if (res < 0) {
542 printf("Could not copy State attribute from previous "
543 "Access-Challenge\n");
544 goto fail;
545 }
546 if (res > 0) {
547 wpa_printf(MSG_DEBUG, "Copied RADIUS State Attribute");
548 }
549 }
550
551 radius_client_send(hapd->radius, msg, RADIUS_AUTH, sta->addr);
552 return;
553
554 fail:
555 radius_msg_free(msg);
6fc6879b 556}
f88bd288 557#endif /* CONFIG_NO_RADIUS */
6fc6879b
JM		 558
559
6fc6879b
JM		 560static void handle_eap_response(struct hostapd_data *hapd,
561 struct sta_info *sta, struct eap_hdr *eap,
562 size_t len)
563{
564 u8 type, *data;
565 struct eapol_state_machine *sm = sta->eapol_sm;
566 if (sm == NULL)
567 return;
568
569 data = (u8 *) (eap + 1);
570
571 if (len < sizeof(*eap) + 1) {
572 printf("handle_eap_response: too short response data\n");
573 return;
574 }
575
576 sm->eap_type_supp = type = data[0];
6fc6879b
JM		 577
578 hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
579 HOSTAPD_LEVEL_DEBUG, "received EAP packet (code=%d "
580 "id=%d len=%d) from STA: EAP Response-%s (%d)",
581 eap->code, eap->identifier, be_to_host16(eap->length),
2773ca09 582 eap_server_get_name(0, type), type);
6fc6879b
JM		 583
584 sm->dot1xAuthEapolRespFramesRx++;
585
586 wpabuf_free(sm->eap_if->eapRespData);
587 sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len);
588 sm->eapolEap = TRUE;
589}
590
591
592/* Process incoming EAP packet from Supplicant */
593static void handle_eap(struct hostapd_data *hapd, struct sta_info *sta,
594 u8 *buf, size_t len)
595{
596 struct eap_hdr *eap;
597 u16 eap_len;
598
599 if (len < sizeof(*eap)) {
600 printf(" too short EAP packet\n");
601 return;
602 }
603
604 eap = (struct eap_hdr *) buf;
605
606 eap_len = be_to_host16(eap->length);
607 wpa_printf(MSG_DEBUG, "EAP: code=%d identifier=%d length=%d",
608 eap->code, eap->identifier, eap_len);
609 if (eap_len < sizeof(*eap)) {
610 wpa_printf(MSG_DEBUG, " Invalid EAP length");
611 return;
612 } else if (eap_len > len) {
613 wpa_printf(MSG_DEBUG, " Too short frame to contain this EAP "
614 "packet");
615 return;
616 } else if (eap_len < len) {
617 wpa_printf(MSG_DEBUG, " Ignoring %lu extra bytes after EAP "
618 "packet", (unsigned long) len - eap_len);
619 }
620
621 switch (eap->code) {
622 case EAP_CODE_REQUEST:
623 wpa_printf(MSG_DEBUG, " (request)");
624 return;
625 case EAP_CODE_RESPONSE:
626 wpa_printf(MSG_DEBUG, " (response)");
627 handle_eap_response(hapd, sta, eap, eap_len);
628 break;
629 case EAP_CODE_SUCCESS:
630 wpa_printf(MSG_DEBUG, " (success)");
631 return;
632 case EAP_CODE_FAILURE:
633 wpa_printf(MSG_DEBUG, " (failure)");
634 return;
635 default:
636 wpa_printf(MSG_DEBUG, " (unknown code)");
637 return;
638 }
639}
640
641
c02d52b4
JM		 642static struct eapol_state_machine *
643ieee802_1x_alloc_eapol_sm(struct hostapd_data *hapd, struct sta_info *sta)
644{
645 int flags = 0;
646 if (sta->flags & WLAN_STA_PREAUTH)
647 flags |= EAPOL_SM_PREAUTH;
648 if (sta->wpa_sm) {
649 if (wpa_auth_sta_get_pmksa(sta->wpa_sm))
650 flags |= EAPOL_SM_USES_WPA;
651 if (wpa_auth_sta_get_pmksa(sta->wpa_sm))
652 flags |= EAPOL_SM_FROM_PMKSA_CACHE;
653 }
d79b7792
JM		 654 return eapol_auth_alloc(hapd->eapol_auth, sta->addr, flags,
655 sta->wps_ie, sta);
c02d52b4
JM		 656}
657
658
1c6e69cc
JM		 659/**
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)
663 * @buf: EAPOL frame
664 * @len: Length of buf in octets
665 *
666 * This function is called for each incoming EAPOL frame from the interface
667 */
6fc6879b
JM		 668void ieee802_1x_receive(struct hostapd_data *hapd, const u8 *sa, const u8 *buf,
669 size_t len)
670{
671 struct sta_info *sta;
672 struct ieee802_1x_hdr *hdr;
673 struct ieee802_1x_eapol_key *key;
674 u16 datalen;
675 struct rsn_pmksa_cache_entry *pmksa;
676
ad08c363
JM		 677 if (!hapd->conf->ieee802_1x && !hapd->conf->wpa &&
678 !hapd->conf->wps_state)
6fc6879b
JM		 679 return;
680
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);
940a0ce9
JM		 684 if (!sta || !(sta->flags & WLAN_STA_ASSOC)) {
685 wpa_printf(MSG_DEBUG, "IEEE 802.1X data frame from not "
686 "associated STA");
6fc6879b
JM		 687 return;
688 }
689
690 if (len < sizeof(*hdr)) {
691 printf(" too short IEEE 802.1X packet\n");
692 return;
693 }
694
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);
699
700 if (len - sizeof(*hdr) < datalen) {
701 printf(" frame too short for this IEEE 802.1X packet\n");
702 if (sta->eapol_sm)
703 sta->eapol_sm->dot1xAuthEapLengthErrorFramesRx++;
704 return;
705 }
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);
710 }
711
712 if (sta->eapol_sm) {
713 sta->eapol_sm->dot1xAuthLastEapolFrameVersion = hdr->version;
714 sta->eapol_sm->dot1xAuthEapolFramesRx++;
715 }
716
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);
724 return;
725 }
726
ad08c363
JM		 727 if ((!hapd->conf->ieee802_1x &&
728 !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) ||
56586197 729 wpa_key_mgmt_wpa_psk(wpa_auth_sta_key_mgmt(sta->wpa_sm)))
6fc6879b
JM		 730 return;
731
732 if (!sta->eapol_sm) {
c02d52b4 733 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
6fc6879b
JM		 734 if (!sta->eapol_sm)
735 return;
ad08c363
JM		 736
737#ifdef CONFIG_WPS
738 if (!hapd->conf->ieee802_1x &&
739 ((sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) ==
740 WLAN_STA_MAYBE_WPS)) {
741 /*
742 * Delay EAPOL frame transmission until a possible WPS
743 * STA initiates the handshake with EAPOL-Start.
744 */
745 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
746 }
747#endif /* CONFIG_WPS */
a60e7213
JM		 748
749 sta->eapol_sm->eap_if->portEnabled = TRUE;
6fc6879b
JM		 750 }
751
752 /* since we support version 1, we can ignore version field and proceed
753 * as specified in version 1 standard [IEEE Std 802.1X-2001, 7.5.5] */
754 /* TODO: actually, we are not version 1 anymore.. However, Version 2
755 * does not change frame contents, so should be ok to process frames
756 * more or less identically. Some changes might be needed for
757 * verification of fields. */
758
759 switch (hdr->type) {
760 case IEEE802_1X_TYPE_EAP_PACKET:
761 handle_eap(hapd, sta, (u8 *) (hdr + 1), datalen);
762 break;
763
764 case IEEE802_1X_TYPE_EAPOL_START:
765 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
766 HOSTAPD_LEVEL_DEBUG, "received EAPOL-Start "
767 "from STA");
768 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
769 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
770 if (pmksa) {
771 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
772 HOSTAPD_LEVEL_DEBUG, "cached PMKSA "
773 "available - ignore it since "
774 "STA sent EAPOL-Start");
775 wpa_auth_sta_clear_pmksa(sta->wpa_sm, pmksa);
776 }
777 sta->eapol_sm->eapolStart = TRUE;
778 sta->eapol_sm->dot1xAuthEapolStartFramesRx++;
779 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
780 break;
781
782 case IEEE802_1X_TYPE_EAPOL_LOGOFF:
783 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
784 HOSTAPD_LEVEL_DEBUG, "received EAPOL-Logoff "
785 "from STA");
786 sta->acct_terminate_cause =
787 RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
b1fa8bf1 788 accounting_sta_stop(hapd, sta);
6fc6879b
JM		 789 sta->eapol_sm->eapolLogoff = TRUE;
790 sta->eapol_sm->dot1xAuthEapolLogoffFramesRx++;
791 break;
792
793 case IEEE802_1X_TYPE_EAPOL_KEY:
794 wpa_printf(MSG_DEBUG, " EAPOL-Key");
795 if (!(sta->flags & WLAN_STA_AUTHORIZED)) {
796 wpa_printf(MSG_DEBUG, " Dropped key data from "
797 "unauthorized Supplicant");
798 break;
799 }
800 break;
801
802 case IEEE802_1X_TYPE_EAPOL_ENCAPSULATED_ASF_ALERT:
803 wpa_printf(MSG_DEBUG, " EAPOL-Encapsulated-ASF-Alert");
804 /* TODO: implement support for this; show data */
805 break;
806
807 default:
808 wpa_printf(MSG_DEBUG, " unknown IEEE 802.1X packet type");
809 sta->eapol_sm->dot1xAuthInvalidEapolFramesRx++;
810 break;
811 }
812
813 eapol_auth_step(sta->eapol_sm);
814}
815
816
1c6e69cc
JM		 817/**
818 * ieee802_1x_new_station - Start IEEE 802.1X authentication
819 * @hapd: hostapd BSS data
820 * @sta: The station
821 *
822 * This function is called to start IEEE 802.1X authentication when a new
823 * station completes IEEE 802.11 association.
824 */
6fc6879b
JM		 825void ieee802_1x_new_station(struct hostapd_data *hapd, struct sta_info *sta)
826{
827 struct rsn_pmksa_cache_entry *pmksa;
828 int reassoc = 1;
829 int force_1x = 0;
830
ad08c363 831#ifdef CONFIG_WPS
a60e7213 832 if (hapd->conf->wps_state && hapd->conf->wpa &&
ad08c363
JM		 833 (sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) {
834 /*
835 * Need to enable IEEE 802.1X/EAPOL state machines for possible
836 * WPS handshake even if IEEE 802.1X/EAPOL is not used for
837 * authentication in this BSS.
838 */
839 force_1x = 1;
840 }
841#endif /* CONFIG_WPS */
842
6fc6879b 843 if ((!force_1x && !hapd->conf->ieee802_1x) ||
56586197 844 wpa_key_mgmt_wpa_psk(wpa_auth_sta_key_mgmt(sta->wpa_sm)))
6fc6879b
JM		 845 return;
846
847 if (sta->eapol_sm == NULL) {
848 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
849 HOSTAPD_LEVEL_DEBUG, "start authentication");
c02d52b4 850 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
6fc6879b
JM		 851 if (sta->eapol_sm == NULL) {
852 hostapd_logger(hapd, sta->addr,
853 HOSTAPD_MODULE_IEEE8021X,
854 HOSTAPD_LEVEL_INFO,
855 "failed to allocate state machine");
856 return;
857 }
858 reassoc = 0;
859 }
860
ad08c363 861#ifdef CONFIG_WPS
a8d05fca 862 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
ad08c363
JM		 863 if (!hapd->conf->ieee802_1x && !(sta->flags & WLAN_STA_WPS)) {
864 /*
865 * Delay EAPOL frame transmission until a possible WPS
866 * initiates the handshake with EAPOL-Start.
867 */
868 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
869 }
870#endif /* CONFIG_WPS */
871
6fc6879b
JM		 872 sta->eapol_sm->eap_if->portEnabled = TRUE;
873
874 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
875 if (pmksa) {
876 int old_vlanid;
877
878 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
879 HOSTAPD_LEVEL_DEBUG,
880 "PMK from PMKSA cache - skip IEEE 802.1X/EAP");
881 /* Setup EAPOL state machines to already authenticated state
882 * because of existing PMKSA information in the cache. */
883 sta->eapol_sm->keyRun = TRUE;
884 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
885 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
886 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
887 sta->eapol_sm->authSuccess = TRUE;
888 if (sta->eapol_sm->eap)
889 eap_sm_notify_cached(sta->eapol_sm->eap);
890 old_vlanid = sta->vlan_id;
891 pmksa_cache_to_eapol_data(pmksa, sta->eapol_sm);
892 if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
893 sta->vlan_id = 0;
894 ap_sta_bind_vlan(hapd, sta, old_vlanid);
895 } else {
896 if (reassoc) {
897 /*
898 * Force EAPOL state machines to start
899 * re-authentication without having to wait for the
900 * Supplicant to send EAPOL-Start.
901 */
902 sta->eapol_sm->reAuthenticate = TRUE;
903 }
904 eapol_auth_step(sta->eapol_sm);
905 }
906}
907
908
6fc6879b
JM		 909void ieee802_1x_free_station(struct sta_info *sta)
910{
911 struct eapol_state_machine *sm = sta->eapol_sm;
912
6fc6879b
JM		 913 if (sm == NULL)
914 return;
915
916 sta->eapol_sm = NULL;
917
f88bd288 918#ifndef CONFIG_NO_RADIUS
9e7245bd 919 radius_msg_free(sm->last_recv_radius);
010dc068 920 radius_free_class(&sm->radius_class);
f88bd288 921#endif /* CONFIG_NO_RADIUS */
6fc6879b
JM		 922
923 os_free(sm->identity);
6fc6879b
JM		 924 eapol_auth_free(sm);
925}
926
927
f88bd288 928#ifndef CONFIG_NO_RADIUS
6fc6879b
JM		 929static void ieee802_1x_decapsulate_radius(struct hostapd_data *hapd,
930 struct sta_info *sta)
931{
932 u8 *eap;
933 size_t len;
934 struct eap_hdr *hdr;
935 int eap_type = -1;
936 char buf[64];
937 struct radius_msg *msg;
938 struct eapol_state_machine *sm = sta->eapol_sm;
939
940 if (sm == NULL || sm->last_recv_radius == NULL) {
941 if (sm)
942 sm->eap_if->aaaEapNoReq = TRUE;
943 return;
944 }
945
946 msg = sm->last_recv_radius;
947
948 eap = radius_msg_get_eap(msg, &len);
949 if (eap == NULL) {
950 /* RFC 3579, Chap. 2.6.3:
951 * RADIUS server SHOULD NOT send Access-Reject/no EAP-Message
952 * attribute */
953 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
954 HOSTAPD_LEVEL_WARNING, "could not extract "
955 "EAP-Message from RADIUS message");
956 sm->eap_if->aaaEapNoReq = TRUE;
957 return;
958 }
959
960 if (len < sizeof(*hdr)) {
961 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
962 HOSTAPD_LEVEL_WARNING, "too short EAP packet "
963 "received from authentication server");
964 os_free(eap);
965 sm->eap_if->aaaEapNoReq = TRUE;
966 return;
967 }
968
969 if (len > sizeof(*hdr))
970 eap_type = eap[sizeof(*hdr)];
971
972 hdr = (struct eap_hdr *) eap;
973 switch (hdr->code) {
974 case EAP_CODE_REQUEST:
975 if (eap_type >= 0)
976 sm->eap_type_authsrv = eap_type;
977 os_snprintf(buf, sizeof(buf), "EAP-Request-%s (%d)",
2773ca09
JM		 978 eap_type >= 0 ? eap_server_get_name(0, eap_type) :
979 "??",
6fc6879b
JM		 980 eap_type);
981 break;
982 case EAP_CODE_RESPONSE:
983 os_snprintf(buf, sizeof(buf), "EAP Response-%s (%d)",
2773ca09
JM		 984 eap_type >= 0 ? eap_server_get_name(0, eap_type) :
985 "??",
6fc6879b
JM		 986 eap_type);
987 break;
988 case EAP_CODE_SUCCESS:
989 os_strlcpy(buf, "EAP Success", sizeof(buf));
990 break;
991 case EAP_CODE_FAILURE:
992 os_strlcpy(buf, "EAP Failure", sizeof(buf));
993 break;
994 default:
995 os_strlcpy(buf, "unknown EAP code", sizeof(buf));
996 break;
997 }
998 buf[sizeof(buf) - 1] = '\0';
999 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1000 HOSTAPD_LEVEL_DEBUG, "decapsulated EAP packet (code=%d "
1001 "id=%d len=%d) from RADIUS server: %s",
1002 hdr->code, hdr->identifier, be_to_host16(hdr->length),
1003 buf);
1004 sm->eap_if->aaaEapReq = TRUE;
1005
1006 wpabuf_free(sm->eap_if->aaaEapReqData);
1007 sm->eap_if->aaaEapReqData = wpabuf_alloc_ext_data(eap, len);
1008}
1009
1010
1011static void ieee802_1x_get_keys(struct hostapd_data *hapd,
1012 struct sta_info *sta, struct radius_msg *msg,
1013 struct radius_msg *req,
7d02e641
JM		 1014 const u8 *shared_secret,
1015 size_t shared_secret_len)
6fc6879b
JM		 1016{
1017 struct radius_ms_mppe_keys *keys;
1018 struct eapol_state_machine *sm = sta->eapol_sm;
1019 if (sm == NULL)
1020 return;
1021
1022 keys = radius_msg_get_ms_keys(msg, req, shared_secret,
1023 shared_secret_len);
1024
1025 if (keys && keys->send && keys->recv) {
1026 size_t len = keys->send_len + keys->recv_len;
1027 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Send-Key",
1028 keys->send, keys->send_len);
1029 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Recv-Key",
1030 keys->recv, keys->recv_len);
1031
1032 os_free(sm->eap_if->aaaEapKeyData);
1033 sm->eap_if->aaaEapKeyData = os_malloc(len);
1034 if (sm->eap_if->aaaEapKeyData) {
1035 os_memcpy(sm->eap_if->aaaEapKeyData, keys->recv,
1036 keys->recv_len);
1037 os_memcpy(sm->eap_if->aaaEapKeyData + keys->recv_len,
1038 keys->send, keys->send_len);
1039 sm->eap_if->aaaEapKeyDataLen = len;
1040 sm->eap_if->aaaEapKeyAvailable = TRUE;
1041 }
1042 }
1043
1044 if (keys) {
1045 os_free(keys->send);
1046 os_free(keys->recv);
1047 os_free(keys);
1048 }
1049}
1050
1051
1052static void ieee802_1x_store_radius_class(struct hostapd_data *hapd,
1053 struct sta_info *sta,
1054 struct radius_msg *msg)
1055{
1056 u8 *class;
1057 size_t class_len;
1058 struct eapol_state_machine *sm = sta->eapol_sm;
1059 int count, i;
1060 struct radius_attr_data *nclass;
1061 size_t nclass_count;
1062
1063 if (!hapd->conf->radius->acct_server || hapd->radius == NULL ||
1064 sm == NULL)
1065 return;
1066
010dc068 1067 radius_free_class(&sm->radius_class);
6fc6879b
JM		 1068 count = radius_msg_count_attr(msg, RADIUS_ATTR_CLASS, 1);
1069 if (count <= 0)
1070 return;
1071
1072 nclass = os_zalloc(count * sizeof(struct radius_attr_data));
1073 if (nclass == NULL)
1074 return;
1075
1076 nclass_count = 0;
1077
1078 class = NULL;
1079 for (i = 0; i < count; i++) {
1080 do {
1081 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CLASS,
1082 &class, &class_len,
1083 class) < 0) {
1084 i = count;
1085 break;
1086 }
1087 } while (class_len < 1);
1088
1089 nclass[nclass_count].data = os_malloc(class_len);
1090 if (nclass[nclass_count].data == NULL)
1091 break;
1092
1093 os_memcpy(nclass[nclass_count].data, class, class_len);
1094 nclass[nclass_count].len = class_len;
1095 nclass_count++;
1096 }
1097
1098 sm->radius_class.attr = nclass;
1099 sm->radius_class.count = nclass_count;
1100 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Stored %lu RADIUS Class "
1101 "attributes for " MACSTR,
1102 (unsigned long) sm->radius_class.count,
1103 MAC2STR(sta->addr));
1104}
1105
1106
1107/* Update sta->identity based on User-Name attribute in Access-Accept */
1108static void ieee802_1x_update_sta_identity(struct hostapd_data *hapd,
1109 struct sta_info *sta,
1110 struct radius_msg *msg)
1111{
1112 u8 *buf, *identity;
1113 size_t len;
1114 struct eapol_state_machine *sm = sta->eapol_sm;
1115
1116 if (sm == NULL)
1117 return;
1118
1119 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_USER_NAME, &buf, &len,
1120 NULL) < 0)
1121 return;
1122
1123 identity = os_malloc(len + 1);
1124 if (identity == NULL)
1125 return;
1126
1127 os_memcpy(identity, buf, len);
1128 identity[len] = '\0';
1129
1130 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1131 HOSTAPD_LEVEL_DEBUG, "old identity '%s' updated with "
1132 "User-Name from Access-Accept '%s'",
1133 sm->identity ? (char *) sm->identity : "N/A",
1134 (char *) identity);
1135
1136 os_free(sm->identity);
1137 sm->identity = identity;
1138 sm->identity_len = len;
1139}
1140
1141
1142struct sta_id_search {
1143 u8 identifier;
1144 struct eapol_state_machine *sm;
1145};
1146
1147
1148static int ieee802_1x_select_radius_identifier(struct hostapd_data *hapd,
1149 struct sta_info *sta,
1150 void *ctx)
1151{
1152 struct sta_id_search *id_search = ctx;
1153 struct eapol_state_machine *sm = sta->eapol_sm;
1154
1155 if (sm && sm->radius_identifier >= 0 &&
1156 sm->radius_identifier == id_search->identifier) {
1157 id_search->sm = sm;
1158 return 1;
1159 }
1160 return 0;
1161}
1162
1163
1164static struct eapol_state_machine *
1165ieee802_1x_search_radius_identifier(struct hostapd_data *hapd, u8 identifier)
1166{
1167 struct sta_id_search id_search;
1168 id_search.identifier = identifier;
1169 id_search.sm = NULL;
1170 ap_for_each_sta(hapd, ieee802_1x_select_radius_identifier, &id_search);
1171 return id_search.sm;
1172}
1173
1174
1c6e69cc
JM		 1175/**
1176 * ieee802_1x_receive_auth - Process RADIUS frames from Authentication Server
1177 * @msg: RADIUS response message
1178 * @req: RADIUS request message
1179 * @shared_secret: RADIUS shared secret
1180 * @shared_secret_len: Length of shared_secret in octets
1181 * @data: Context data (struct hostapd_data *)
1182 * Returns: Processing status
1183 */
6fc6879b
JM		 1184static RadiusRxResult
1185ieee802_1x_receive_auth(struct radius_msg *msg, struct radius_msg *req,
7d02e641 1186 const u8 *shared_secret, size_t shared_secret_len,
6fc6879b
JM		 1187 void *data)
1188{
1189 struct hostapd_data *hapd = data;
1190 struct sta_info *sta;
1191 u32 session_timeout = 0, termination_action, acct_interim_interval;
1192 int session_timeout_set, old_vlanid = 0;
6fc6879b
JM		 1193 struct eapol_state_machine *sm;
1194 int override_eapReq = 0;
1489e11a 1195 struct radius_hdr *hdr = radius_msg_get_hdr(msg);
6fc6879b 1196
1489e11a 1197 sm = ieee802_1x_search_radius_identifier(hapd, hdr->identifier);
6fc6879b
JM		 1198 if (sm == NULL) {
1199 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Could not find matching "
1200 "station for this RADIUS message");
1201 return RADIUS_RX_UNKNOWN;
1202 }
1203 sta = sm->sta;
1204
1205 /* RFC 2869, Ch. 5.13: valid Message-Authenticator attribute MUST be
1206 * present when packet contains an EAP-Message attribute */
1489e11a 1207 if (hdr->code == RADIUS_CODE_ACCESS_REJECT &&
6fc6879b
JM		 1208 radius_msg_get_attr(msg, RADIUS_ATTR_MESSAGE_AUTHENTICATOR, NULL,
1209 0) < 0 &&
1210 radius_msg_get_attr(msg, RADIUS_ATTR_EAP_MESSAGE, NULL, 0) < 0) {
1211 wpa_printf(MSG_DEBUG, "Allowing RADIUS Access-Reject without "
1212 "Message-Authenticator since it does not include "
1213 "EAP-Message");
1214 } else if (radius_msg_verify(msg, shared_secret, shared_secret_len,
1215 req, 1)) {
1216 printf("Incoming RADIUS packet did not have correct "
1217 "Message-Authenticator - dropped\n");
1218 return RADIUS_RX_INVALID_AUTHENTICATOR;
1219 }
1220
1489e11a
JM		 1221 if (hdr->code != RADIUS_CODE_ACCESS_ACCEPT &&
1222 hdr->code != RADIUS_CODE_ACCESS_REJECT &&
1223 hdr->code != RADIUS_CODE_ACCESS_CHALLENGE) {
6fc6879b
JM		 1224 printf("Unknown RADIUS message code\n");
1225 return RADIUS_RX_UNKNOWN;
1226 }
1227
1228 sm->radius_identifier = -1;
1229 wpa_printf(MSG_DEBUG, "RADIUS packet matching with station " MACSTR,
1230 MAC2STR(sta->addr));
1231
9e7245bd 1232 radius_msg_free(sm->last_recv_radius);
6fc6879b
JM		 1233 sm->last_recv_radius = msg;
1234
1235 session_timeout_set =
1236 !radius_msg_get_attr_int32(msg, RADIUS_ATTR_SESSION_TIMEOUT,
1237 &session_timeout);
1238 if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_TERMINATION_ACTION,
1239 &termination_action))
1240 termination_action = RADIUS_TERMINATION_ACTION_DEFAULT;
1241
5843e1c9 1242 if (hapd->conf->acct_interim_interval == 0 &&
1489e11a 1243 hdr->code == RADIUS_CODE_ACCESS_ACCEPT &&
6fc6879b
JM		 1244 radius_msg_get_attr_int32(msg, RADIUS_ATTR_ACCT_INTERIM_INTERVAL,
1245 &acct_interim_interval) == 0) {
1246 if (acct_interim_interval < 60) {
1247 hostapd_logger(hapd, sta->addr,
1248 HOSTAPD_MODULE_IEEE8021X,
1249 HOSTAPD_LEVEL_INFO,
1250 "ignored too small "
1251 "Acct-Interim-Interval %d",
1252 acct_interim_interval);
1253 } else
1254 sta->acct_interim_interval = acct_interim_interval;
1255 }
1256
1257
1489e11a 1258 switch (hdr->code) {
6fc6879b
JM		 1259 case RADIUS_CODE_ACCESS_ACCEPT:
1260 if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
1261 sta->vlan_id = 0;
30b32314 1262#ifndef CONFIG_NO_VLAN
6fc6879b
JM		 1263 else {
1264 old_vlanid = sta->vlan_id;
1265 sta->vlan_id = radius_msg_get_vlanid(msg);
1266 }
1267 if (sta->vlan_id > 0 &&
1268 hostapd_get_vlan_id_ifname(hapd->conf->vlan,
1269 sta->vlan_id)) {
1270 hostapd_logger(hapd, sta->addr,
1271 HOSTAPD_MODULE_RADIUS,
1272 HOSTAPD_LEVEL_INFO,
1273 "VLAN ID %d", sta->vlan_id);
1274 } else if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_REQUIRED) {
1275 sta->eapol_sm->authFail = TRUE;
1276 hostapd_logger(hapd, sta->addr,
1277 HOSTAPD_MODULE_IEEE8021X,
1278 HOSTAPD_LEVEL_INFO, "authentication "
1279 "server did not include required VLAN "
1280 "ID in Access-Accept");
1281 break;
1282 }
30b32314 1283#endif /* CONFIG_NO_VLAN */
6fc6879b
JM		 1284
1285 ap_sta_bind_vlan(hapd, sta, old_vlanid);
1286
1287 /* RFC 3580, Ch. 3.17 */
1288 if (session_timeout_set && termination_action ==
1289 RADIUS_TERMINATION_ACTION_RADIUS_REQUEST) {
1290 sm->reAuthPeriod = session_timeout;
1291 } else if (session_timeout_set)
1292 ap_sta_session_timeout(hapd, sta, session_timeout);
1293
1294 sm->eap_if->aaaSuccess = TRUE;
1295 override_eapReq = 1;
1296 ieee802_1x_get_keys(hapd, sta, msg, req, shared_secret,
1297 shared_secret_len);
1298 ieee802_1x_store_radius_class(hapd, sta, msg);
1299 ieee802_1x_update_sta_identity(hapd, sta, msg);
1300 if (sm->eap_if->eapKeyAvailable &&
1301 wpa_auth_pmksa_add(sta->wpa_sm, sm->eapol_key_crypt,
1302 session_timeout_set ?
1303 (int) session_timeout : -1, sm) == 0) {
1304 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
1305 HOSTAPD_LEVEL_DEBUG,
1306 "Added PMKSA cache entry");
1307 }
1308 break;
1309 case RADIUS_CODE_ACCESS_REJECT:
1310 sm->eap_if->aaaFail = TRUE;
1311 override_eapReq = 1;
1312 break;
1313 case RADIUS_CODE_ACCESS_CHALLENGE:
1314 sm->eap_if->aaaEapReq = TRUE;
1315 if (session_timeout_set) {
1316 /* RFC 2869, Ch. 2.3.2; RFC 3580, Ch. 3.17 */
8e09c6d2
JM		 1317 sm->eap_if->aaaMethodTimeout = session_timeout;
1318 hostapd_logger(hapd, sm->addr,
1319 HOSTAPD_MODULE_IEEE8021X,
1320 HOSTAPD_LEVEL_DEBUG,
1321 "using EAP timeout of %d seconds (from "
1322 "RADIUS)",
1323 sm->eap_if->aaaMethodTimeout);
1324 } else {
1325 /*
1326 * Use dynamic retransmission behavior per EAP
1327 * specification.
1328 */
1329 sm->eap_if->aaaMethodTimeout = 0;
1330 }
6fc6879b
JM		 1331 break;
1332 }
1333
1334 ieee802_1x_decapsulate_radius(hapd, sta);
1335 if (override_eapReq)
1336 sm->eap_if->aaaEapReq = FALSE;
1337
1338 eapol_auth_step(sm);
1339
1340 return RADIUS_RX_QUEUED;
1341}
f88bd288 1342#endif /* CONFIG_NO_RADIUS */
6fc6879b
JM		 1343
1344
1345void ieee802_1x_abort_auth(struct hostapd_data *hapd, struct sta_info *sta)
1346{
1347 struct eapol_state_machine *sm = sta->eapol_sm;
1348 if (sm == NULL)
1349 return;
1350
1351 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1352 HOSTAPD_LEVEL_DEBUG, "aborting authentication");
1353
f88bd288 1354#ifndef CONFIG_NO_RADIUS
9e7245bd
JM		 1355 radius_msg_free(sm->last_recv_radius);
1356 sm->last_recv_radius = NULL;
f88bd288 1357#endif /* CONFIG_NO_RADIUS */
805e6dc6
JM		 1358
1359 if (sm->eap_if->eapTimeout) {
1360 /*
1361 * Disconnect the STA since it did not reply to the last EAP
1362 * request and we cannot continue EAP processing (EAP-Failure
1363 * could only be sent if the EAP peer actually replied).
1364 */
1365 sm->eap_if->portEnabled = FALSE;
45cefa0b
JM		 1366 ap_sta_disconnect(hapd, sta, sta->addr,
1367 WLAN_REASON_PREV_AUTH_NOT_VALID);
805e6dc6 1368 }
6fc6879b
JM		 1369}
1370
1371
6fc6879b
JM		 1372static int ieee802_1x_rekey_broadcast(struct hostapd_data *hapd)
1373{
f55802e8
JM		 1374 struct eapol_authenticator *eapol = hapd->eapol_auth;
1375
6fc6879b
JM		 1376 if (hapd->conf->default_wep_key_len < 1)
1377 return 0;
1378
f55802e8
JM		 1379 os_free(eapol->default_wep_key);
1380 eapol->default_wep_key = os_malloc(hapd->conf->default_wep_key_len);
1381 if (eapol->default_wep_key == NULL ||
1382 os_get_random(eapol->default_wep_key,
6fc6879b
JM		 1383 hapd->conf->default_wep_key_len)) {
1384 printf("Could not generate random WEP key.\n");
f55802e8
JM		 1385 os_free(eapol->default_wep_key);
1386 eapol->default_wep_key = NULL;
6fc6879b
JM		 1387 return -1;
1388 }
1389
1390 wpa_hexdump_key(MSG_DEBUG, "IEEE 802.1X: New default WEP key",
f55802e8 1391 eapol->default_wep_key,
6fc6879b
JM		 1392 hapd->conf->default_wep_key_len);
1393
1394 return 0;
1395}
1396
1397
1398static int ieee802_1x_sta_key_available(struct hostapd_data *hapd,
1399 struct sta_info *sta, void *ctx)
1400{
1401 if (sta->eapol_sm) {
1402 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
1403 eapol_auth_step(sta->eapol_sm);
1404 }
1405 return 0;
1406}
1407
1408
1409static void ieee802_1x_rekey(void *eloop_ctx, void *timeout_ctx)
1410{
1411 struct hostapd_data *hapd = eloop_ctx;
f55802e8 1412 struct eapol_authenticator *eapol = hapd->eapol_auth;
6fc6879b 1413
f55802e8
JM		 1414 if (eapol->default_wep_key_idx >= 3)
1415 eapol->default_wep_key_idx =
6fc6879b
JM		 1416 hapd->conf->individual_wep_key_len > 0 ? 1 : 0;
1417 else
f55802e8 1418 eapol->default_wep_key_idx++;
6fc6879b
JM		 1419
1420 wpa_printf(MSG_DEBUG, "IEEE 802.1X: New default WEP key index %d",
f55802e8 1421 eapol->default_wep_key_idx);
6fc6879b
JM		 1422
1423 if (ieee802_1x_rekey_broadcast(hapd)) {
1424 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1425 HOSTAPD_LEVEL_WARNING, "failed to generate a "
1426 "new broadcast key");
f55802e8
JM		 1427 os_free(eapol->default_wep_key);
1428 eapol->default_wep_key = NULL;
6fc6879b
JM		 1429 return;
1430 }
1431
1432 /* TODO: Could setup key for RX here, but change default TX keyid only
1433 * after new broadcast key has been sent to all stations. */
45cefa0b
JM		 1434 if (hapd->drv.set_key(hapd->conf->iface, hapd, WPA_ALG_WEP, NULL,
1435 eapol->default_wep_key_idx, 1, NULL, 0,
1436 eapol->default_wep_key,
1437 hapd->conf->default_wep_key_len)) {
6fc6879b
JM		 1438 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1439 HOSTAPD_LEVEL_WARNING, "failed to configure a "
1440 "new broadcast key");
f55802e8
JM		 1441 os_free(eapol->default_wep_key);
1442 eapol->default_wep_key = NULL;
6fc6879b
JM		 1443 return;
1444 }
1445
1446 ap_for_each_sta(hapd, ieee802_1x_sta_key_available, NULL);
1447
1448 if (hapd->conf->wep_rekeying_period > 0) {
1449 eloop_register_timeout(hapd->conf->wep_rekeying_period, 0,
1450 ieee802_1x_rekey, hapd, NULL);
1451 }
1452}
1453
1454
1455static void ieee802_1x_eapol_send(void *ctx, void *sta_ctx, u8 type,
1456 const u8 *data, size_t datalen)
1457{
1458 ieee802_1x_send(ctx, sta_ctx, type, data, datalen);
1459}
1460
1461
1462static void ieee802_1x_aaa_send(void *ctx, void *sta_ctx,
1463 const u8 *data, size_t datalen)
1464{
f88bd288 1465#ifndef CONFIG_NO_RADIUS
6fc6879b
JM		 1466 struct hostapd_data *hapd = ctx;
1467 struct sta_info *sta = sta_ctx;
1468
1469 ieee802_1x_encapsulate_radius(hapd, sta, data, datalen);
f88bd288 1470#endif /* CONFIG_NO_RADIUS */
6fc6879b
JM		 1471}
1472
1473
1474static void _ieee802_1x_finished(void *ctx, void *sta_ctx, int success,
1475 int preauth)
1476{
1477 struct hostapd_data *hapd = ctx;
1478 struct sta_info *sta = sta_ctx;
1479 if (preauth)
1480 rsn_preauth_finished(hapd, sta, success);
1481 else
1482 ieee802_1x_finished(hapd, sta, success);
1483}
1484
1485
1486static int ieee802_1x_get_eap_user(void *ctx, const u8 *identity,
1487 size_t identity_len, int phase2,
1488 struct eap_user *user)
1489{
1490 struct hostapd_data *hapd = ctx;
1491 const struct hostapd_eap_user *eap_user;
1492 int i, count;
1493
1494 eap_user = hostapd_get_eap_user(hapd->conf, identity,
1495 identity_len, phase2);
1496 if (eap_user == NULL)
1497 return -1;
1498
1499 os_memset(user, 0, sizeof(*user));
1500 user->phase2 = phase2;
1501 count = EAP_USER_MAX_METHODS;
1502 if (count > EAP_MAX_METHODS)
1503 count = EAP_MAX_METHODS;
1504 for (i = 0; i < count; i++) {
1505 user->methods[i].vendor = eap_user->methods[i].vendor;
1506 user->methods[i].method = eap_user->methods[i].method;
1507 }
1508
1509 if (eap_user->password) {
1510 user->password = os_malloc(eap_user->password_len);
1511 if (user->password == NULL)
1512 return -1;
1513 os_memcpy(user->password, eap_user->password,
1514 eap_user->password_len);
1515 user->password_len = eap_user->password_len;
1516 }
1517 user->force_version = eap_user->force_version;
1518 user->ttls_auth = eap_user->ttls_auth;
1519
1520 return 0;
1521}
1522
1523
1524static int ieee802_1x_sta_entry_alive(void *ctx, const u8 *addr)
1525{
1526 struct hostapd_data *hapd = ctx;
1527 struct sta_info *sta;
1528 sta = ap_get_sta(hapd, addr);
1529 if (sta == NULL || sta->eapol_sm == NULL)
1530 return 0;
1531 return 1;
1532}
1533
1534
1535static void ieee802_1x_logger(void *ctx, const u8 *addr,
1536 eapol_logger_level level, const char *txt)
1537{
71f04b3c 1538#ifndef CONFIG_NO_HOSTAPD_LOGGER
6fc6879b
JM		 1539 struct hostapd_data *hapd = ctx;
1540 int hlevel;
1541
1542 switch (level) {
1543 case EAPOL_LOGGER_WARNING:
1544 hlevel = HOSTAPD_LEVEL_WARNING;
1545 break;
1546 case EAPOL_LOGGER_INFO:
1547 hlevel = HOSTAPD_LEVEL_INFO;
1548 break;
1549 case EAPOL_LOGGER_DEBUG:
1550 default:
1551 hlevel = HOSTAPD_LEVEL_DEBUG;
1552 break;
1553 }
1554
1555 hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE8021X, hlevel, "%s",
1556 txt);
71f04b3c 1557#endif /* CONFIG_NO_HOSTAPD_LOGGER */
6fc6879b
JM		 1558}
1559
1560
1561static void ieee802_1x_set_port_authorized(void *ctx, void *sta_ctx,
1562 int authorized)
1563{
1564 struct hostapd_data *hapd = ctx;
1565 struct sta_info *sta = sta_ctx;
1566 ieee802_1x_set_sta_authorized(hapd, sta, authorized);
1567}
1568
1569
1570static void _ieee802_1x_abort_auth(void *ctx, void *sta_ctx)
1571{
1572 struct hostapd_data *hapd = ctx;
1573 struct sta_info *sta = sta_ctx;
1574 ieee802_1x_abort_auth(hapd, sta);
1575}
1576
1577
1578static void _ieee802_1x_tx_key(void *ctx, void *sta_ctx)
1579{
1580 struct hostapd_data *hapd = ctx;
1581 struct sta_info *sta = sta_ctx;
1582 ieee802_1x_tx_key(hapd, sta);
1583}
1584
1585
38294200
JM		 1586static void ieee802_1x_eapol_event(void *ctx, void *sta_ctx,
1587 enum eapol_event type)
1588{
1589 /* struct hostapd_data *hapd = ctx; */
1590 struct sta_info *sta = sta_ctx;
1591 switch (type) {
1592 case EAPOL_AUTH_SM_CHANGE:
1593 wpa_auth_sm_notify(sta->wpa_sm);
1594 break;
1595 case EAPOL_AUTH_REAUTHENTICATE:
1596 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
1597 break;
1598 }
1599}
1600
1601
6fc6879b
JM		 1602int ieee802_1x_init(struct hostapd_data *hapd)
1603{
1604 int i;
1605 struct eapol_auth_config conf;
1606 struct eapol_auth_cb cb;
1607
1608 os_memset(&conf, 0, sizeof(conf));
a2befd37 1609 conf.ctx = hapd;
6fc6879b
JM		 1610 conf.eap_reauth_period = hapd->conf->eap_reauth_period;
1611 conf.wpa = hapd->conf->wpa;
1612 conf.individual_wep_key_len = hapd->conf->individual_wep_key_len;
1613 conf.eap_server = hapd->conf->eap_server;
1614 conf.ssl_ctx = hapd->ssl_ctx;
1615 conf.eap_sim_db_priv = hapd->eap_sim_db_priv;
1616 conf.eap_req_id_text = hapd->conf->eap_req_id_text;
1617 conf.eap_req_id_text_len = hapd->conf->eap_req_id_text_len;
1618 conf.pac_opaque_encr_key = hapd->conf->pac_opaque_encr_key;
1619 conf.eap_fast_a_id = hapd->conf->eap_fast_a_id;
2d867244
JM		 1620 conf.eap_fast_a_id_len = hapd->conf->eap_fast_a_id_len;
1621 conf.eap_fast_a_id_info = hapd->conf->eap_fast_a_id_info;
378eae5e 1622 conf.eap_fast_prov = hapd->conf->eap_fast_prov;
a11c90a6
JM		 1623 conf.pac_key_lifetime = hapd->conf->pac_key_lifetime;
1624 conf.pac_key_refresh_time = hapd->conf->pac_key_refresh_time;
6fc6879b 1625 conf.eap_sim_aka_result_ind = hapd->conf->eap_sim_aka_result_ind;
c3e258ae 1626 conf.tnc = hapd->conf->tnc;
ad08c363 1627 conf.wps = hapd->wps;
6fc6879b
JM		 1628
1629 os_memset(&cb, 0, sizeof(cb));
1630 cb.eapol_send = ieee802_1x_eapol_send;
1631 cb.aaa_send = ieee802_1x_aaa_send;
1632 cb.finished = _ieee802_1x_finished;
1633 cb.get_eap_user = ieee802_1x_get_eap_user;
1634 cb.sta_entry_alive = ieee802_1x_sta_entry_alive;
1635 cb.logger = ieee802_1x_logger;
1636 cb.set_port_authorized = ieee802_1x_set_port_authorized;
1637 cb.abort_auth = _ieee802_1x_abort_auth;
1638 cb.tx_key = _ieee802_1x_tx_key;
38294200 1639 cb.eapol_event = ieee802_1x_eapol_event;
6fc6879b
JM		 1640
1641 hapd->eapol_auth = eapol_auth_init(&conf, &cb);
1642 if (hapd->eapol_auth == NULL)
1643 return -1;
1644
1645 if ((hapd->conf->ieee802_1x || hapd->conf->wpa) &&
010401fe 1646 hapd->drv.set_drv_ieee8021x(hapd, hapd->conf->iface, 1))
6fc6879b
JM		 1647 return -1;
1648
f88bd288 1649#ifndef CONFIG_NO_RADIUS
6fc6879b
JM		 1650 if (radius_client_register(hapd->radius, RADIUS_AUTH,
1651 ieee802_1x_receive_auth, hapd))
1652 return -1;
f88bd288 1653#endif /* CONFIG_NO_RADIUS */
6fc6879b
JM		 1654
1655 if (hapd->conf->default_wep_key_len) {
6fc6879b 1656 for (i = 0; i < 4; i++)
45cefa0b
JM		 1657 hapd->drv.set_key(hapd->conf->iface, hapd,
1658 WPA_ALG_NONE, NULL, i, 0, NULL, 0,
1659 NULL, 0);
6fc6879b
JM		 1660
1661 ieee802_1x_rekey(hapd, NULL);
1662
f55802e8 1663 if (hapd->eapol_auth->default_wep_key == NULL)
6fc6879b
JM		 1664 return -1;
1665 }
1666
1667 return 0;
1668}
1669
1670
1671void ieee802_1x_deinit(struct hostapd_data *hapd)
1672{
1673 eloop_cancel_timeout(ieee802_1x_rekey, hapd, NULL);
1674
1675 if (hapd->driver != NULL &&
1676 (hapd->conf->ieee802_1x || hapd->conf->wpa))
010401fe 1677 hapd->drv.set_drv_ieee8021x(hapd, hapd->conf->iface, 0);
6fc6879b
JM		 1678
1679 eapol_auth_deinit(hapd->eapol_auth);
1680 hapd->eapol_auth = NULL;
1681}
1682
1683
6fc6879b 1684int ieee802_1x_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
8607f4c3 1685 const u8 *buf, size_t len, int ack)
6fc6879b
JM		 1686{
1687 struct ieee80211_hdr *hdr;
1688 struct ieee802_1x_hdr *xhdr;
1689 struct ieee802_1x_eapol_key *key;
1690 u8 *pos;
1691 const unsigned char rfc1042_hdr[ETH_ALEN] =
1692 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
1693
1694 if (sta == NULL)
1695 return -1;
1696 if (len < sizeof(*hdr) + sizeof(rfc1042_hdr) + 2 + sizeof(*xhdr))
1697 return 0;
1698
1699 hdr = (struct ieee80211_hdr *) buf;
1700 pos = (u8 *) (hdr + 1);
1701 if (os_memcmp(pos, rfc1042_hdr, sizeof(rfc1042_hdr)) != 0)
1702 return 0;
1703 pos += sizeof(rfc1042_hdr);
1704 if (WPA_GET_BE16(pos) != ETH_P_PAE)
1705 return 0;
1706 pos += 2;
1707
1708 xhdr = (struct ieee802_1x_hdr *) pos;
1709 pos += sizeof(*xhdr);
1710
1711 wpa_printf(MSG_DEBUG, "IEEE 802.1X: " MACSTR " TX status - version=%d "
1712 "type=%d length=%d - ack=%d",
1713 MAC2STR(sta->addr), xhdr->version, xhdr->type,
1714 be_to_host16(xhdr->length), ack);
1715
1716 /* EAPOL EAP-Packet packets are eventually re-sent by either Supplicant
1717 * or Authenticator state machines, but EAPOL-Key packets are not
1718 * retransmitted in case of failure. Try to re-sent failed EAPOL-Key
1719 * packets couple of times because otherwise STA keys become
1720 * unsynchronized with AP. */
1721 if (xhdr->type == IEEE802_1X_TYPE_EAPOL_KEY && !ack &&
1722 pos + sizeof(*key) <= buf + len) {
1723 key = (struct ieee802_1x_eapol_key *) pos;
1724 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1725 HOSTAPD_LEVEL_DEBUG, "did not Ack EAPOL-Key "
1726 "frame (%scast index=%d)",
1727 key->key_index & BIT(7) ? "uni" : "broad",
1728 key->key_index & ~BIT(7));
1729 /* TODO: re-send EAPOL-Key couple of times (with short delay
1730 * between them?). If all attempt fail, report error and
1731 * deauthenticate STA so that it will get new keys when
1732 * authenticating again (e.g., after returning in range).
1733 * Separate limit/transmit state needed both for unicast and
1734 * broadcast keys(?) */
1735 }
1736 /* TODO: could move unicast key configuration from ieee802_1x_tx_key()
1737 * to here and change the key only if the EAPOL-Key packet was Acked.
1738 */
1739
1740 return 1;
1741}
1742
1743
1744u8 * ieee802_1x_get_identity(struct eapol_state_machine *sm, size_t *len)
1745{
1746 if (sm == NULL || sm->identity == NULL)
1747 return NULL;
1748
1749 *len = sm->identity_len;
1750 return sm->identity;
1751}
1752
1753
1754u8 * ieee802_1x_get_radius_class(struct eapol_state_machine *sm, size_t *len,
1755 int idx)
1756{
1757 if (sm == NULL || sm->radius_class.attr == NULL ||
1758 idx >= (int) sm->radius_class.count)
1759 return NULL;
1760
1761 *len = sm->radius_class.attr[idx].len;
1762 return sm->radius_class.attr[idx].data;
1763}
1764
1765
1766const u8 * ieee802_1x_get_key(struct eapol_state_machine *sm, size_t *len)
1767{
1768 if (sm == NULL)
1769 return NULL;
1770
1771 *len = sm->eap_if->eapKeyDataLen;
1772 return sm->eap_if->eapKeyData;
1773}
1774
1775
1776void ieee802_1x_notify_port_enabled(struct eapol_state_machine *sm,
1777 int enabled)
1778{
1779 if (sm == NULL)
1780 return;
1781 sm->eap_if->portEnabled = enabled ? TRUE : FALSE;
1782 eapol_auth_step(sm);
1783}
1784
1785
1786void ieee802_1x_notify_port_valid(struct eapol_state_machine *sm,
1787 int valid)
1788{
1789 if (sm == NULL)
1790 return;
1791 sm->portValid = valid ? TRUE : FALSE;
1792 eapol_auth_step(sm);
1793}
1794
1795
1796void ieee802_1x_notify_pre_auth(struct eapol_state_machine *sm, int pre_auth)
1797{
1798 if (sm == NULL)
1799 return;
1800 if (pre_auth)
1801 sm->flags |= EAPOL_SM_PREAUTH;
1802 else
1803 sm->flags &= ~EAPOL_SM_PREAUTH;
1804}
1805
1806
1807static const char * bool_txt(Boolean bool)
1808{
1809 return bool ? "TRUE" : "FALSE";
1810}
1811
1812
1813int ieee802_1x_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
1814{
1815 /* TODO */
1816 return 0;
1817}
1818
1819
1820int ieee802_1x_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
1821 char *buf, size_t buflen)
1822{
1823 int len = 0, ret;
1824 struct eapol_state_machine *sm = sta->eapol_sm;
1825
1826 if (sm == NULL)
1827 return 0;
1828
1829 ret = os_snprintf(buf + len, buflen - len,
1830 "dot1xPaePortNumber=%d\n"
1831 "dot1xPaePortProtocolVersion=%d\n"
1832 "dot1xPaePortCapabilities=1\n"
1833 "dot1xPaePortInitialize=%d\n"
1834 "dot1xPaePortReauthenticate=FALSE\n",
1835 sta->aid,
1836 EAPOL_VERSION,
1837 sm->initialize);
1838 if (ret < 0 || (size_t) ret >= buflen - len)
1839 return len;
1840 len += ret;
1841
1842 /* dot1xAuthConfigTable */
1843 ret = os_snprintf(buf + len, buflen - len,
1844 "dot1xAuthPaeState=%d\n"
1845 "dot1xAuthBackendAuthState=%d\n"
1846 "dot1xAuthAdminControlledDirections=%d\n"
1847 "dot1xAuthOperControlledDirections=%d\n"
1848 "dot1xAuthAuthControlledPortStatus=%d\n"
1849 "dot1xAuthAuthControlledPortControl=%d\n"
1850 "dot1xAuthQuietPeriod=%u\n"
1851 "dot1xAuthServerTimeout=%u\n"
1852 "dot1xAuthReAuthPeriod=%u\n"
1853 "dot1xAuthReAuthEnabled=%s\n"
1854 "dot1xAuthKeyTxEnabled=%s\n",
1855 sm->auth_pae_state + 1,
1856 sm->be_auth_state + 1,
1857 sm->adminControlledDirections,
1858 sm->operControlledDirections,
1859 sm->authPortStatus,
1860 sm->portControl,
1861 sm->quietPeriod,
1862 sm->serverTimeout,
1863 sm->reAuthPeriod,
1864 bool_txt(sm->reAuthEnabled),
1865 bool_txt(sm->keyTxEnabled));
1866 if (ret < 0 || (size_t) ret >= buflen - len)
1867 return len;
1868 len += ret;
1869
1870 /* dot1xAuthStatsTable */
1871 ret = os_snprintf(buf + len, buflen - len,
1872 "dot1xAuthEapolFramesRx=%u\n"
1873 "dot1xAuthEapolFramesTx=%u\n"
1874 "dot1xAuthEapolStartFramesRx=%u\n"
1875 "dot1xAuthEapolLogoffFramesRx=%u\n"
1876 "dot1xAuthEapolRespIdFramesRx=%u\n"
1877 "dot1xAuthEapolRespFramesRx=%u\n"
1878 "dot1xAuthEapolReqIdFramesTx=%u\n"
1879 "dot1xAuthEapolReqFramesTx=%u\n"
1880 "dot1xAuthInvalidEapolFramesRx=%u\n"
1881 "dot1xAuthEapLengthErrorFramesRx=%u\n"
1882 "dot1xAuthLastEapolFrameVersion=%u\n"
1883 "dot1xAuthLastEapolFrameSource=" MACSTR "\n",
1884 sm->dot1xAuthEapolFramesRx,
1885 sm->dot1xAuthEapolFramesTx,
1886 sm->dot1xAuthEapolStartFramesRx,
1887 sm->dot1xAuthEapolLogoffFramesRx,
1888 sm->dot1xAuthEapolRespIdFramesRx,
1889 sm->dot1xAuthEapolRespFramesRx,
1890 sm->dot1xAuthEapolReqIdFramesTx,
1891 sm->dot1xAuthEapolReqFramesTx,
1892 sm->dot1xAuthInvalidEapolFramesRx,
1893 sm->dot1xAuthEapLengthErrorFramesRx,
1894 sm->dot1xAuthLastEapolFrameVersion,
1895 MAC2STR(sm->addr));
1896 if (ret < 0 || (size_t) ret >= buflen - len)
1897 return len;
1898 len += ret;
1899
1900 /* dot1xAuthDiagTable */
1901 ret = os_snprintf(buf + len, buflen - len,
1902 "dot1xAuthEntersConnecting=%u\n"
1903 "dot1xAuthEapLogoffsWhileConnecting=%u\n"
1904 "dot1xAuthEntersAuthenticating=%u\n"
1905 "dot1xAuthAuthSuccessesWhileAuthenticating=%u\n"
1906 "dot1xAuthAuthTimeoutsWhileAuthenticating=%u\n"
1907 "dot1xAuthAuthFailWhileAuthenticating=%u\n"
1908 "dot1xAuthAuthEapStartsWhileAuthenticating=%u\n"
1909 "dot1xAuthAuthEapLogoffWhileAuthenticating=%u\n"
1910 "dot1xAuthAuthReauthsWhileAuthenticated=%u\n"
1911 "dot1xAuthAuthEapStartsWhileAuthenticated=%u\n"
1912 "dot1xAuthAuthEapLogoffWhileAuthenticated=%u\n"
1913 "dot1xAuthBackendResponses=%u\n"
1914 "dot1xAuthBackendAccessChallenges=%u\n"
1915 "dot1xAuthBackendOtherRequestsToSupplicant=%u\n"
1916 "dot1xAuthBackendAuthSuccesses=%u\n"
1917 "dot1xAuthBackendAuthFails=%u\n",
1918 sm->authEntersConnecting,
1919 sm->authEapLogoffsWhileConnecting,
1920 sm->authEntersAuthenticating,
1921 sm->authAuthSuccessesWhileAuthenticating,
1922 sm->authAuthTimeoutsWhileAuthenticating,
1923 sm->authAuthFailWhileAuthenticating,
1924 sm->authAuthEapStartsWhileAuthenticating,
1925 sm->authAuthEapLogoffWhileAuthenticating,
1926 sm->authAuthReauthsWhileAuthenticated,
1927 sm->authAuthEapStartsWhileAuthenticated,
1928 sm->authAuthEapLogoffWhileAuthenticated,
1929 sm->backendResponses,
1930 sm->backendAccessChallenges,
1931 sm->backendOtherRequestsToSupplicant,
1932 sm->backendAuthSuccesses,
1933 sm->backendAuthFails);
1934 if (ret < 0 || (size_t) ret >= buflen - len)
1935 return len;
1936 len += ret;
1937
1938 /* dot1xAuthSessionStatsTable */
1939 ret = os_snprintf(buf + len, buflen - len,
1940 /* TODO: dot1xAuthSessionOctetsRx */
1941 /* TODO: dot1xAuthSessionOctetsTx */
1942 /* TODO: dot1xAuthSessionFramesRx */
1943 /* TODO: dot1xAuthSessionFramesTx */
1944 "dot1xAuthSessionId=%08X-%08X\n"
1945 "dot1xAuthSessionAuthenticMethod=%d\n"
1946 "dot1xAuthSessionTime=%u\n"
1947 "dot1xAuthSessionTerminateCause=999\n"
1948 "dot1xAuthSessionUserName=%s\n",
1949 sta->acct_session_id_hi, sta->acct_session_id_lo,
56586197
JM		 1950 (wpa_key_mgmt_wpa_ieee8021x(
1951 wpa_auth_sta_key_mgmt(sta->wpa_sm))) ?
1952 1 : 2,
6fc6879b
JM		 1953 (unsigned int) (time(NULL) -
1954 sta->acct_session_start),
1955 sm->identity);
1956 if (ret < 0 || (size_t) ret >= buflen - len)
1957 return len;
1958 len += ret;
1959
1960 return len;
1961}
1962
1963
1964static void ieee802_1x_finished(struct hostapd_data *hapd,
1965 struct sta_info *sta, int success)
1966{
1967 const u8 *key;
1968 size_t len;
1969 /* TODO: get PMKLifetime from WPA parameters */
1970 static const int dot11RSNAConfigPMKLifetime = 43200;
1971
1972 key = ieee802_1x_get_key(sta->eapol_sm, &len);
1973 if (success && key && len >= PMK_LEN &&
1974 wpa_auth_pmksa_add(sta->wpa_sm, key, dot11RSNAConfigPMKLifetime,
1975 sta->eapol_sm) == 0) {
1976 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
1977 HOSTAPD_LEVEL_DEBUG,
1978 "Added PMKSA cache entry (IEEE 802.1X)");
1979 }
1980}
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