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[thirdparty/hostap.git] / src / ap / ieee802_1x.c
CommitLineData
6fc6879b
JM		 1/*
2 * hostapd / IEEE 802.1X-2004 Authenticator
55bce124 3 * Copyright (c) 2002-2011, 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
6226e38d 15#include "utils/includes.h"
6fc6879b 16
6226e38d
JM		 17#include "utils/common.h"
18#include "utils/eloop.h"
03da66bd
JM		 19#include "crypto/md5.h"
20#include "crypto/crypto.h"
3642c431 21#include "crypto/random.h"
03da66bd
JM		 22#include "common/ieee802_11_defs.h"
23#include "common/wpa_ctrl.h"
6fc6879b
JM		 24#include "radius/radius.h"
25#include "radius/radius_client.h"
6226e38d 26#include "eap_server/eap.h"
4e22adb4 27#include "eap_common/eap_wsc_common.h"
281c950b 28#include "eapol_auth/eapol_auth_sm.h"
e0e14a7b 29#include "eapol_auth/eapol_auth_sm_i.h"
03da66bd 30#include "hostapd.h"
03da66bd 31#include "accounting.h"
6fc6879b 32#include "sta_info.h"
6226e38d
JM		 33#include "wpa_auth.h"
34#include "preauth_auth.h"
35#include "pmksa_cache_auth.h"
36#include "ap_config.h"
3acdf771 37#include "ap_drv_ops.h"
6226e38d 38#include "ieee802_1x.h"
6fc6879b
JM		 39
40
41static void ieee802_1x_finished(struct hostapd_data *hapd,
42 struct sta_info *sta, int success);
43
44
45static void ieee802_1x_send(struct hostapd_data *hapd, struct sta_info *sta,
46 u8 type, const u8 *data, size_t datalen)
47{
48 u8 *buf;
49 struct ieee802_1x_hdr *xhdr;
50 size_t len;
51 int encrypt = 0;
52
53 len = sizeof(*xhdr) + datalen;
54 buf = os_zalloc(len);
55 if (buf == NULL) {
56 wpa_printf(MSG_ERROR, "malloc() failed for "
57 "ieee802_1x_send(len=%lu)",
58 (unsigned long) len);
59 return;
60 }
61
62 xhdr = (struct ieee802_1x_hdr *) buf;
63 xhdr->version = hapd->conf->eapol_version;
64 xhdr->type = type;
65 xhdr->length = host_to_be16(datalen);
66
67 if (datalen > 0 && data != NULL)
68 os_memcpy(xhdr + 1, data, datalen);
69
70 if (wpa_auth_pairwise_set(sta->wpa_sm))
71 encrypt = 1;
72 if (sta->flags & WLAN_STA_PREAUTH) {
73 rsn_preauth_send(hapd, sta, buf, len);
74 } else {
3acdf771 75 hostapd_drv_hapd_send_eapol(hapd, sta->addr, buf, len,
4378fc14 76 encrypt, sta->flags);
6fc6879b
JM		 77 }
78
79 os_free(buf);
80}
81
82
83void ieee802_1x_set_sta_authorized(struct hostapd_data *hapd,
84 struct sta_info *sta, int authorized)
85{
86 int res;
87
88 if (sta->flags & WLAN_STA_PREAUTH)
89 return;
90
91 if (authorized) {
6905dcb1 92 if (!ap_sta_is_authorized(sta))
20bd9547
JM		 93 wpa_msg(hapd->msg_ctx, MSG_INFO,
94 AP_STA_CONNECTED MACSTR, MAC2STR(sta->addr));
6905dcb1 95 ap_sta_set_authorized(hapd, sta, 1);
0e8a96a9 96 res = hostapd_set_authorized(hapd, sta, 1);
6fc6879b
JM		 97 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
98 HOSTAPD_LEVEL_DEBUG, "authorizing port");
99 } else {
6905dcb1 100 if (ap_sta_is_authorized(sta) && (sta->flags & WLAN_STA_ASSOC))
20bd9547
JM		 101 wpa_msg(hapd->msg_ctx, MSG_INFO,
102 AP_STA_DISCONNECTED MACSTR,
103 MAC2STR(sta->addr));
6905dcb1 104 ap_sta_set_authorized(hapd, sta, 0);
0e8a96a9 105 res = hostapd_set_authorized(hapd, sta, 0);
6fc6879b
JM		 106 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
107 HOSTAPD_LEVEL_DEBUG, "unauthorizing port");
108 }
109
110 if (res && errno != ENOENT) {
111 printf("Could not set station " MACSTR " flags for kernel "
112 "driver (errno=%d).\n", MAC2STR(sta->addr), errno);
113 }
114
115 if (authorized)
116 accounting_sta_start(hapd, sta);
117}
118
119
6fc6879b
JM		 120static void ieee802_1x_tx_key_one(struct hostapd_data *hapd,
121 struct sta_info *sta,
122 int idx, int broadcast,
123 u8 *key_data, size_t key_len)
124{
125 u8 *buf, *ekey;
126 struct ieee802_1x_hdr *hdr;
127 struct ieee802_1x_eapol_key *key;
128 size_t len, ekey_len;
129 struct eapol_state_machine *sm = sta->eapol_sm;
130
131 if (sm == NULL)
132 return;
133
134 len = sizeof(*key) + key_len;
135 buf = os_zalloc(sizeof(*hdr) + len);
136 if (buf == NULL)
137 return;
138
139 hdr = (struct ieee802_1x_hdr *) buf;
140 key = (struct ieee802_1x_eapol_key *) (hdr + 1);
141 key->type = EAPOL_KEY_TYPE_RC4;
142 key->key_length = htons(key_len);
143 wpa_get_ntp_timestamp(key->replay_counter);
144
3642c431 145 if (random_get_bytes(key->key_iv, sizeof(key->key_iv))) {
6fc6879b
JM		 146 wpa_printf(MSG_ERROR, "Could not get random numbers");
147 os_free(buf);
148 return;
149 }
150
151 key->key_index = idx | (broadcast ? 0 : BIT(7));
152 if (hapd->conf->eapol_key_index_workaround) {
153 /* According to some information, WinXP Supplicant seems to
154 * interpret bit7 as an indication whether the key is to be
155 * activated, so make it possible to enable workaround that
156 * sets this bit for all keys. */
157 key->key_index |= BIT(7);
158 }
159
160 /* Key is encrypted using "Key-IV + MSK[0..31]" as the RC4-key and
161 * MSK[32..63] is used to sign the message. */
162 if (sm->eap_if->eapKeyData == NULL || sm->eap_if->eapKeyDataLen < 64) {
163 wpa_printf(MSG_ERROR, "No eapKeyData available for encrypting "
164 "and signing EAPOL-Key");
165 os_free(buf);
166 return;
167 }
168 os_memcpy((u8 *) (key + 1), key_data, key_len);
169 ekey_len = sizeof(key->key_iv) + 32;
170 ekey = os_malloc(ekey_len);
171 if (ekey == NULL) {
172 wpa_printf(MSG_ERROR, "Could not encrypt key");
173 os_free(buf);
174 return;
175 }
176 os_memcpy(ekey, key->key_iv, sizeof(key->key_iv));
177 os_memcpy(ekey + sizeof(key->key_iv), sm->eap_if->eapKeyData, 32);
8ef16831 178 rc4_skip(ekey, ekey_len, 0, (u8 *) (key + 1), key_len);
6fc6879b
JM		 179 os_free(ekey);
180
181 /* This header is needed here for HMAC-MD5, but it will be regenerated
182 * in ieee802_1x_send() */
183 hdr->version = hapd->conf->eapol_version;
184 hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
185 hdr->length = host_to_be16(len);
186 hmac_md5(sm->eap_if->eapKeyData + 32, 32, buf, sizeof(*hdr) + len,
187 key->key_signature);
188
189 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key to " MACSTR
190 " (%s index=%d)", MAC2STR(sm->addr),
191 broadcast ? "broadcast" : "unicast", idx);
192 ieee802_1x_send(hapd, sta, IEEE802_1X_TYPE_EAPOL_KEY, (u8 *) key, len);
193 if (sta->eapol_sm)
194 sta->eapol_sm->dot1xAuthEapolFramesTx++;
195 os_free(buf);
196}
197
198
30b32314 199#ifndef CONFIG_NO_VLAN
6fc6879b
JM		 200static struct hostapd_wep_keys *
201ieee802_1x_group_alloc(struct hostapd_data *hapd, const char *ifname)
202{
203 struct hostapd_wep_keys *key;
204
205 key = os_zalloc(sizeof(*key));
206 if (key == NULL)
207 return NULL;
208
209 key->default_len = hapd->conf->default_wep_key_len;
210
211 if (key->idx >= hapd->conf->broadcast_key_idx_max ||
212 key->idx < hapd->conf->broadcast_key_idx_min)
213 key->idx = hapd->conf->broadcast_key_idx_min;
214 else
215 key->idx++;
216
217 if (!key->key[key->idx])
218 key->key[key->idx] = os_malloc(key->default_len);
219 if (key->key[key->idx] == NULL ||
3642c431 220 random_get_bytes(key->key[key->idx], key->default_len)) {
6fc6879b
JM		 221 printf("Could not generate random WEP key (dynamic VLAN).\n");
222 os_free(key->key[key->idx]);
223 key->key[key->idx] = NULL;
224 os_free(key);
225 return NULL;
226 }
227 key->len[key->idx] = key->default_len;
228
229 wpa_printf(MSG_DEBUG, "%s: Default WEP idx %d for dynamic VLAN\n",
230 ifname, key->idx);
231 wpa_hexdump_key(MSG_DEBUG, "Default WEP key (dynamic VLAN)",
232 key->key[key->idx], key->len[key->idx]);
233
0382097e
JM		 234 if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_WEP,
235 broadcast_ether_addr, key->idx, 1,
3acdf771
JM		 236 NULL, 0, key->key[key->idx],
237 key->len[key->idx]))
6fc6879b
JM		 238 printf("Could not set dynamic VLAN WEP encryption key.\n");
239
0e8a96a9 240 hostapd_set_drv_ieee8021x(hapd, ifname, 1);
6fc6879b
JM		 241
242 return key;
243}
244
245
246static struct hostapd_wep_keys *
247ieee802_1x_get_group(struct hostapd_data *hapd, struct hostapd_ssid *ssid,
248 size_t vlan_id)
249{
250 const char *ifname;
251
252 if (vlan_id == 0)
253 return &ssid->wep;
254
255 if (vlan_id <= ssid->max_dyn_vlan_keys && ssid->dyn_vlan_keys &&
256 ssid->dyn_vlan_keys[vlan_id])
257 return ssid->dyn_vlan_keys[vlan_id];
258
259 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Creating new group "
260 "state machine for VLAN ID %lu",
261 (unsigned long) vlan_id);
262
263 ifname = hostapd_get_vlan_id_ifname(hapd->conf->vlan, vlan_id);
264 if (ifname == NULL) {
265 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Unknown VLAN ID %lu - "
266 "cannot create group key state machine",
267 (unsigned long) vlan_id);
268 return NULL;
269 }
270
271 if (ssid->dyn_vlan_keys == NULL) {
272 int size = (vlan_id + 1) * sizeof(ssid->dyn_vlan_keys[0]);
273 ssid->dyn_vlan_keys = os_zalloc(size);
274 if (ssid->dyn_vlan_keys == NULL)
275 return NULL;
276 ssid->max_dyn_vlan_keys = vlan_id;
277 }
278
279 if (ssid->max_dyn_vlan_keys < vlan_id) {
280 struct hostapd_wep_keys **na;
281 int size = (vlan_id + 1) * sizeof(ssid->dyn_vlan_keys[0]);
282 na = os_realloc(ssid->dyn_vlan_keys, size);
283 if (na == NULL)
284 return NULL;
285 ssid->dyn_vlan_keys = na;
286 os_memset(&ssid->dyn_vlan_keys[ssid->max_dyn_vlan_keys + 1], 0,
287 (vlan_id - ssid->max_dyn_vlan_keys) *
288 sizeof(ssid->dyn_vlan_keys[0]));
289 ssid->max_dyn_vlan_keys = vlan_id;
290 }
291
292 ssid->dyn_vlan_keys[vlan_id] = ieee802_1x_group_alloc(hapd, ifname);
293
294 return ssid->dyn_vlan_keys[vlan_id];
295}
30b32314 296#endif /* CONFIG_NO_VLAN */
6fc6879b
JM		 297
298
299void ieee802_1x_tx_key(struct hostapd_data *hapd, struct sta_info *sta)
300{
f55802e8 301 struct eapol_authenticator *eapol = hapd->eapol_auth;
6fc6879b 302 struct eapol_state_machine *sm = sta->eapol_sm;
30b32314
JM		 303#ifndef CONFIG_NO_VLAN
304 struct hostapd_wep_keys *key = NULL;
6fc6879b 305 int vlan_id;
30b32314 306#endif /* CONFIG_NO_VLAN */
6fc6879b
JM		 307
308 if (sm == NULL || !sm->eap_if->eapKeyData)
309 return;
310
311 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key(s) to " MACSTR,
312 MAC2STR(sta->addr));
313
30b32314 314#ifndef CONFIG_NO_VLAN
6fc6879b
JM		 315 vlan_id = sta->vlan_id;
316 if (vlan_id < 0 || vlan_id > MAX_VLAN_ID)
317 vlan_id = 0;
318
319 if (vlan_id) {
320 key = ieee802_1x_get_group(hapd, sta->ssid, vlan_id);
321 if (key && key->key[key->idx])
322 ieee802_1x_tx_key_one(hapd, sta, key->idx, 1,
323 key->key[key->idx],
324 key->len[key->idx]);
30b32314
JM		 325 } else
326#endif /* CONFIG_NO_VLAN */
f55802e8
JM		 327 if (eapol->default_wep_key) {
328 ieee802_1x_tx_key_one(hapd, sta, eapol->default_wep_key_idx, 1,
329 eapol->default_wep_key,
6fc6879b
JM		 330 hapd->conf->default_wep_key_len);
331 }
332
333 if (hapd->conf->individual_wep_key_len > 0) {
334 u8 *ikey;
335 ikey = os_malloc(hapd->conf->individual_wep_key_len);
336 if (ikey == NULL ||
3642c431
JM		 337 random_get_bytes(ikey, hapd->conf->individual_wep_key_len))
338 {
6fc6879b
JM		 339 wpa_printf(MSG_ERROR, "Could not generate random "
340 "individual WEP key.");
341 os_free(ikey);
342 return;
343 }
344
345 wpa_hexdump_key(MSG_DEBUG, "Individual WEP key",
346 ikey, hapd->conf->individual_wep_key_len);
347
348 ieee802_1x_tx_key_one(hapd, sta, 0, 0, ikey,
349 hapd->conf->individual_wep_key_len);
350
351 /* TODO: set encryption in TX callback, i.e., only after STA
352 * has ACKed EAPOL-Key frame */
3acdf771
JM		 353 if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
354 sta->addr, 0, 1, NULL, 0, ikey,
355 hapd->conf->individual_wep_key_len)) {
6fc6879b
JM		 356 wpa_printf(MSG_ERROR, "Could not set individual WEP "
357 "encryption.");
358 }
359
360 os_free(ikey);
361 }
362}
363
364
365const char *radius_mode_txt(struct hostapd_data *hapd)
366{
45cefa0b 367 switch (hapd->iface->conf->hw_mode) {
6fc6879b
JM		 368 case HOSTAPD_MODE_IEEE80211A:
369 return "802.11a";
370 case HOSTAPD_MODE_IEEE80211G:
371 return "802.11g";
372 case HOSTAPD_MODE_IEEE80211B:
373 default:
374 return "802.11b";
375 }
376}
377
378
379int radius_sta_rate(struct hostapd_data *hapd, struct sta_info *sta)
380{
381 int i;
382 u8 rate = 0;
383
384 for (i = 0; i < sta->supported_rates_len; i++)
385 if ((sta->supported_rates[i] & 0x7f) > rate)
386 rate = sta->supported_rates[i] & 0x7f;
387
388 return rate;
389}
390
391
f88bd288 392#ifndef CONFIG_NO_RADIUS
6fc6879b
JM		 393static void ieee802_1x_learn_identity(struct hostapd_data *hapd,
394 struct eapol_state_machine *sm,
395 const u8 *eap, size_t len)
396{
397 const u8 *identity;
398 size_t identity_len;
399
400 if (len <= sizeof(struct eap_hdr) ||
401 eap[sizeof(struct eap_hdr)] != EAP_TYPE_IDENTITY)
402 return;
403
404 identity = eap_get_identity(sm->eap, &identity_len);
405 if (identity == NULL)
406 return;
407
408 /* Save station identity for future RADIUS packets */
409 os_free(sm->identity);
410 sm->identity = os_malloc(identity_len + 1);
411 if (sm->identity == NULL) {
412 sm->identity_len = 0;
413 return;
414 }
415
416 os_memcpy(sm->identity, identity, identity_len);
417 sm->identity_len = identity_len;
418 sm->identity[identity_len] = '\0';
419 hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
420 HOSTAPD_LEVEL_DEBUG, "STA identity '%s'", sm->identity);
421 sm->dot1xAuthEapolRespIdFramesRx++;
422}
423
424
425static void ieee802_1x_encapsulate_radius(struct hostapd_data *hapd,
426 struct sta_info *sta,
427 const u8 *eap, size_t len)
428{
429 struct radius_msg *msg;
430 char buf[128];
431 struct eapol_state_machine *sm = sta->eapol_sm;
432
433 if (sm == NULL)
434 return;
435
436 ieee802_1x_learn_identity(hapd, sm, eap, len);
437
438 wpa_printf(MSG_DEBUG, "Encapsulating EAP message into a RADIUS "
439 "packet");
440
441 sm->radius_identifier = radius_client_get_id(hapd->radius);
442 msg = radius_msg_new(RADIUS_CODE_ACCESS_REQUEST,
443 sm->radius_identifier);
444 if (msg == NULL) {
445 printf("Could not create net RADIUS packet\n");
446 return;
447 }
448
449 radius_msg_make_authenticator(msg, (u8 *) sta, sizeof(*sta));
450
451 if (sm->identity &&
452 !radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME,
453 sm->identity, sm->identity_len)) {
454 printf("Could not add User-Name\n");
455 goto fail;
456 }
457
458 if (hapd->conf->own_ip_addr.af == AF_INET &&
459 !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS,
460 (u8 *) &hapd->conf->own_ip_addr.u.v4, 4)) {
461 printf("Could not add NAS-IP-Address\n");
462 goto fail;
463 }
464
465#ifdef CONFIG_IPV6
466 if (hapd->conf->own_ip_addr.af == AF_INET6 &&
467 !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IPV6_ADDRESS,
468 (u8 *) &hapd->conf->own_ip_addr.u.v6, 16)) {
469 printf("Could not add NAS-IPv6-Address\n");
470 goto fail;
471 }
472#endif /* CONFIG_IPV6 */
473
474 if (hapd->conf->nas_identifier &&
475 !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IDENTIFIER,
476 (u8 *) hapd->conf->nas_identifier,
477 os_strlen(hapd->conf->nas_identifier))) {
478 printf("Could not add NAS-Identifier\n");
479 goto fail;
480 }
481
482 if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT, sta->aid)) {
483 printf("Could not add NAS-Port\n");
484 goto fail;
485 }
486
487 os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT ":%s",
488 MAC2STR(hapd->own_addr), hapd->conf->ssid.ssid);
489 buf[sizeof(buf) - 1] = '\0';
490 if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLED_STATION_ID,
491 (u8 *) buf, os_strlen(buf))) {
492 printf("Could not add Called-Station-Id\n");
493 goto fail;
494 }
495
496 os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
497 MAC2STR(sta->addr));
498 buf[sizeof(buf) - 1] = '\0';
499 if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID,
500 (u8 *) buf, os_strlen(buf))) {
501 printf("Could not add Calling-Station-Id\n");
502 goto fail;
503 }
504
505 /* TODO: should probably check MTU from driver config; 2304 is max for
506 * IEEE 802.11, but use 1400 to avoid problems with too large packets
507 */
508 if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_FRAMED_MTU, 1400)) {
509 printf("Could not add Framed-MTU\n");
510 goto fail;
511 }
512
513 if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT_TYPE,
514 RADIUS_NAS_PORT_TYPE_IEEE_802_11)) {
515 printf("Could not add NAS-Port-Type\n");
516 goto fail;
517 }
518
519 if (sta->flags & WLAN_STA_PREAUTH) {
520 os_strlcpy(buf, "IEEE 802.11i Pre-Authentication",
521 sizeof(buf));
522 } else {
523 os_snprintf(buf, sizeof(buf), "CONNECT %d%sMbps %s",
524 radius_sta_rate(hapd, sta) / 2,
525 (radius_sta_rate(hapd, sta) & 1) ? ".5" : "",
526 radius_mode_txt(hapd));
527 buf[sizeof(buf) - 1] = '\0';
528 }
529 if (!radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO,
530 (u8 *) buf, os_strlen(buf))) {
531 printf("Could not add Connect-Info\n");
532 goto fail;
533 }
534
535 if (eap && !radius_msg_add_eap(msg, eap, len)) {
536 printf("Could not add EAP-Message\n");
537 goto fail;
538 }
539
540 /* State attribute must be copied if and only if this packet is
541 * Access-Request reply to the previous Access-Challenge */
1489e11a
JM		 542 if (sm->last_recv_radius &&
543 radius_msg_get_hdr(sm->last_recv_radius)->code ==
6fc6879b
JM		 544 RADIUS_CODE_ACCESS_CHALLENGE) {
545 int res = radius_msg_copy_attr(msg, sm->last_recv_radius,
546 RADIUS_ATTR_STATE);
547 if (res < 0) {
548 printf("Could not copy State attribute from previous "
549 "Access-Challenge\n");
550 goto fail;
551 }
552 if (res > 0) {
553 wpa_printf(MSG_DEBUG, "Copied RADIUS State Attribute");
554 }
555 }
556
dbb6ed7e
MH		 557 if (radius_client_send(hapd->radius, msg, RADIUS_AUTH, sta->addr) < 0)
558 goto fail;
559
6fc6879b
JM		 560 return;
561
562 fail:
563 radius_msg_free(msg);
6fc6879b 564}
f88bd288 565#endif /* CONFIG_NO_RADIUS */
6fc6879b
JM		 566
567
6fc6879b
JM		 568static void handle_eap_response(struct hostapd_data *hapd,
569 struct sta_info *sta, struct eap_hdr *eap,
570 size_t len)
571{
572 u8 type, *data;
573 struct eapol_state_machine *sm = sta->eapol_sm;
574 if (sm == NULL)
575 return;
576
577 data = (u8 *) (eap + 1);
578
579 if (len < sizeof(*eap) + 1) {
580 printf("handle_eap_response: too short response data\n");
581 return;
582 }
583
584 sm->eap_type_supp = type = data[0];
6fc6879b
JM		 585
586 hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
587 HOSTAPD_LEVEL_DEBUG, "received EAP packet (code=%d "
588 "id=%d len=%d) from STA: EAP Response-%s (%d)",
589 eap->code, eap->identifier, be_to_host16(eap->length),
2773ca09 590 eap_server_get_name(0, type), type);
6fc6879b
JM		 591
592 sm->dot1xAuthEapolRespFramesRx++;
593
594 wpabuf_free(sm->eap_if->eapRespData);
595 sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len);
596 sm->eapolEap = TRUE;
597}
598
599
600/* Process incoming EAP packet from Supplicant */
601static void handle_eap(struct hostapd_data *hapd, struct sta_info *sta,
602 u8 *buf, size_t len)
603{
604 struct eap_hdr *eap;
605 u16 eap_len;
606
607 if (len < sizeof(*eap)) {
608 printf(" too short EAP packet\n");
609 return;
610 }
611
612 eap = (struct eap_hdr *) buf;
613
614 eap_len = be_to_host16(eap->length);
615 wpa_printf(MSG_DEBUG, "EAP: code=%d identifier=%d length=%d",
616 eap->code, eap->identifier, eap_len);
617 if (eap_len < sizeof(*eap)) {
618 wpa_printf(MSG_DEBUG, " Invalid EAP length");
619 return;
620 } else if (eap_len > len) {
621 wpa_printf(MSG_DEBUG, " Too short frame to contain this EAP "
622 "packet");
623 return;
624 } else if (eap_len < len) {
625 wpa_printf(MSG_DEBUG, " Ignoring %lu extra bytes after EAP "
626 "packet", (unsigned long) len - eap_len);
627 }
628
629 switch (eap->code) {
630 case EAP_CODE_REQUEST:
631 wpa_printf(MSG_DEBUG, " (request)");
632 return;
633 case EAP_CODE_RESPONSE:
634 wpa_printf(MSG_DEBUG, " (response)");
635 handle_eap_response(hapd, sta, eap, eap_len);
636 break;
637 case EAP_CODE_SUCCESS:
638 wpa_printf(MSG_DEBUG, " (success)");
639 return;
640 case EAP_CODE_FAILURE:
641 wpa_printf(MSG_DEBUG, " (failure)");
642 return;
643 default:
644 wpa_printf(MSG_DEBUG, " (unknown code)");
645 return;
646 }
647}
648
649
c02d52b4
JM		 650static struct eapol_state_machine *
651ieee802_1x_alloc_eapol_sm(struct hostapd_data *hapd, struct sta_info *sta)
652{
653 int flags = 0;
654 if (sta->flags & WLAN_STA_PREAUTH)
655 flags |= EAPOL_SM_PREAUTH;
656 if (sta->wpa_sm) {
439d4bf9 657 flags |= EAPOL_SM_USES_WPA;
c02d52b4
JM		 658 if (wpa_auth_sta_get_pmksa(sta->wpa_sm))
659 flags |= EAPOL_SM_FROM_PMKSA_CACHE;
660 }
d79b7792 661 return eapol_auth_alloc(hapd->eapol_auth, sta->addr, flags,
f684e608 662 sta->wps_ie, sta->p2p_ie, sta);
c02d52b4
JM		 663}
664
665
1c6e69cc
JM		 666/**
667 * ieee802_1x_receive - Process the EAPOL frames from the Supplicant
668 * @hapd: hostapd BSS data
669 * @sa: Source address (sender of the EAPOL frame)
670 * @buf: EAPOL frame
671 * @len: Length of buf in octets
672 *
673 * This function is called for each incoming EAPOL frame from the interface
674 */
6fc6879b
JM		 675void ieee802_1x_receive(struct hostapd_data *hapd, const u8 *sa, const u8 *buf,
676 size_t len)
677{
678 struct sta_info *sta;
679 struct ieee802_1x_hdr *hdr;
680 struct ieee802_1x_eapol_key *key;
681 u16 datalen;
682 struct rsn_pmksa_cache_entry *pmksa;
df13a1cd 683 int key_mgmt;
6fc6879b 684
ad08c363
JM		 685 if (!hapd->conf->ieee802_1x && !hapd->conf->wpa &&
686 !hapd->conf->wps_state)
6fc6879b
JM		 687 return;
688
689 wpa_printf(MSG_DEBUG, "IEEE 802.1X: %lu bytes from " MACSTR,
690 (unsigned long) len, MAC2STR(sa));
691 sta = ap_get_sta(hapd, sa);
c9265931 692 if (!sta || !(sta->flags & (WLAN_STA_ASSOC | WLAN_STA_PREAUTH))) {
940a0ce9 693 wpa_printf(MSG_DEBUG, "IEEE 802.1X data frame from not "
c9265931 694 "associated/Pre-authenticating STA");
6fc6879b
JM		 695 return;
696 }
697
698 if (len < sizeof(*hdr)) {
699 printf(" too short IEEE 802.1X packet\n");
700 return;
701 }
702
703 hdr = (struct ieee802_1x_hdr *) buf;
704 datalen = be_to_host16(hdr->length);
705 wpa_printf(MSG_DEBUG, " IEEE 802.1X: version=%d type=%d length=%d",
706 hdr->version, hdr->type, datalen);
707
708 if (len - sizeof(*hdr) < datalen) {
709 printf(" frame too short for this IEEE 802.1X packet\n");
710 if (sta->eapol_sm)
711 sta->eapol_sm->dot1xAuthEapLengthErrorFramesRx++;
712 return;
713 }
714 if (len - sizeof(*hdr) > datalen) {
715 wpa_printf(MSG_DEBUG, " ignoring %lu extra octets after "
716 "IEEE 802.1X packet",
717 (unsigned long) len - sizeof(*hdr) - datalen);
718 }
719
720 if (sta->eapol_sm) {
721 sta->eapol_sm->dot1xAuthLastEapolFrameVersion = hdr->version;
722 sta->eapol_sm->dot1xAuthEapolFramesRx++;
723 }
724
725 key = (struct ieee802_1x_eapol_key *) (hdr + 1);
726 if (datalen >= sizeof(struct ieee802_1x_eapol_key) &&
727 hdr->type == IEEE802_1X_TYPE_EAPOL_KEY &&
728 (key->type == EAPOL_KEY_TYPE_WPA ||
729 key->type == EAPOL_KEY_TYPE_RSN)) {
730 wpa_receive(hapd->wpa_auth, sta->wpa_sm, (u8 *) hdr,
731 sizeof(*hdr) + datalen);
732 return;
733 }
734
df13a1cd
JM		 735 if (!hapd->conf->ieee802_1x &&
736 !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) {
737 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore EAPOL message - "
738 "802.1X not enabled and WPS not used");
6fc6879b 739 return;
df13a1cd
JM		 740 }
741
742 key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm);
743 if (key_mgmt != -1 && wpa_key_mgmt_wpa_psk(key_mgmt)) {
744 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore EAPOL message - "
745 "STA is using PSK");
746 return;
747 }
6fc6879b
JM		 748
749 if (!sta->eapol_sm) {
c02d52b4 750 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
6fc6879b
JM		 751 if (!sta->eapol_sm)
752 return;
ad08c363
JM		 753
754#ifdef CONFIG_WPS
755 if (!hapd->conf->ieee802_1x &&
756 ((sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) ==
757 WLAN_STA_MAYBE_WPS)) {
758 /*
759 * Delay EAPOL frame transmission until a possible WPS
760 * STA initiates the handshake with EAPOL-Start.
761 */
762 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
763 }
764#endif /* CONFIG_WPS */
a60e7213
JM		 765
766 sta->eapol_sm->eap_if->portEnabled = TRUE;
6fc6879b
JM		 767 }
768
769 /* since we support version 1, we can ignore version field and proceed
770 * as specified in version 1 standard [IEEE Std 802.1X-2001, 7.5.5] */
771 /* TODO: actually, we are not version 1 anymore.. However, Version 2
772 * does not change frame contents, so should be ok to process frames
773 * more or less identically. Some changes might be needed for
774 * verification of fields. */
775
776 switch (hdr->type) {
777 case IEEE802_1X_TYPE_EAP_PACKET:
778 handle_eap(hapd, sta, (u8 *) (hdr + 1), datalen);
779 break;
780
781 case IEEE802_1X_TYPE_EAPOL_START:
782 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
783 HOSTAPD_LEVEL_DEBUG, "received EAPOL-Start "
784 "from STA");
785 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
786 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
787 if (pmksa) {
788 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
789 HOSTAPD_LEVEL_DEBUG, "cached PMKSA "
790 "available - ignore it since "
791 "STA sent EAPOL-Start");
792 wpa_auth_sta_clear_pmksa(sta->wpa_sm, pmksa);
793 }
794 sta->eapol_sm->eapolStart = TRUE;
795 sta->eapol_sm->dot1xAuthEapolStartFramesRx++;
6fc58a89 796 eap_server_clear_identity(sta->eapol_sm->eap);
6fc6879b
JM		 797 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
798 break;
799
800 case IEEE802_1X_TYPE_EAPOL_LOGOFF:
801 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
802 HOSTAPD_LEVEL_DEBUG, "received EAPOL-Logoff "
803 "from STA");
804 sta->acct_terminate_cause =
805 RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
b1fa8bf1 806 accounting_sta_stop(hapd, sta);
6fc6879b
JM		 807 sta->eapol_sm->eapolLogoff = TRUE;
808 sta->eapol_sm->dot1xAuthEapolLogoffFramesRx++;
6fc58a89 809 eap_server_clear_identity(sta->eapol_sm->eap);
6fc6879b
JM		 810 break;
811
812 case IEEE802_1X_TYPE_EAPOL_KEY:
813 wpa_printf(MSG_DEBUG, " EAPOL-Key");
6905dcb1 814 if (!ap_sta_is_authorized(sta)) {
6fc6879b
JM		 815 wpa_printf(MSG_DEBUG, " Dropped key data from "
816 "unauthorized Supplicant");
817 break;
818 }
819 break;
820
821 case IEEE802_1X_TYPE_EAPOL_ENCAPSULATED_ASF_ALERT:
822 wpa_printf(MSG_DEBUG, " EAPOL-Encapsulated-ASF-Alert");
823 /* TODO: implement support for this; show data */
824 break;
825
826 default:
827 wpa_printf(MSG_DEBUG, " unknown IEEE 802.1X packet type");
828 sta->eapol_sm->dot1xAuthInvalidEapolFramesRx++;
829 break;
830 }
831
832 eapol_auth_step(sta->eapol_sm);
833}
834
835
1c6e69cc
JM		 836/**
837 * ieee802_1x_new_station - Start IEEE 802.1X authentication
838 * @hapd: hostapd BSS data
839 * @sta: The station
840 *
841 * This function is called to start IEEE 802.1X authentication when a new
842 * station completes IEEE 802.11 association.
843 */
6fc6879b
JM		 844void ieee802_1x_new_station(struct hostapd_data *hapd, struct sta_info *sta)
845{
846 struct rsn_pmksa_cache_entry *pmksa;
847 int reassoc = 1;
848 int force_1x = 0;
df13a1cd 849 int key_mgmt;
6fc6879b 850
ad08c363 851#ifdef CONFIG_WPS
a60e7213 852 if (hapd->conf->wps_state && hapd->conf->wpa &&
ad08c363
JM		 853 (sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) {
854 /*
855 * Need to enable IEEE 802.1X/EAPOL state machines for possible
856 * WPS handshake even if IEEE 802.1X/EAPOL is not used for
857 * authentication in this BSS.
858 */
859 force_1x = 1;
860 }
861#endif /* CONFIG_WPS */
862
df13a1cd
JM		 863 if (!force_1x && !hapd->conf->ieee802_1x) {
864 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - "
865 "802.1X not enabled or forced for WPS");
6fc6879b 866 return;
df13a1cd
JM		 867 }
868
869 key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm);
870 if (key_mgmt != -1 && wpa_key_mgmt_wpa_psk(key_mgmt)) {
871 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - using PSK");
872 return;
873 }
6fc6879b
JM		 874
875 if (sta->eapol_sm == NULL) {
876 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
877 HOSTAPD_LEVEL_DEBUG, "start authentication");
c02d52b4 878 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
6fc6879b
JM		 879 if (sta->eapol_sm == NULL) {
880 hostapd_logger(hapd, sta->addr,
881 HOSTAPD_MODULE_IEEE8021X,
882 HOSTAPD_LEVEL_INFO,
883 "failed to allocate state machine");
884 return;
885 }
886 reassoc = 0;
887 }
888
ad08c363 889#ifdef CONFIG_WPS
a8d05fca 890 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
ad08c363
JM		 891 if (!hapd->conf->ieee802_1x && !(sta->flags & WLAN_STA_WPS)) {
892 /*
893 * Delay EAPOL frame transmission until a possible WPS
894 * initiates the handshake with EAPOL-Start.
895 */
896 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
897 }
898#endif /* CONFIG_WPS */
899
6fc6879b
JM		 900 sta->eapol_sm->eap_if->portEnabled = TRUE;
901
55bce124
JM		 902#ifdef CONFIG_IEEE80211R
903 if (sta->auth_alg == WLAN_AUTH_FT) {
904 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
905 HOSTAPD_LEVEL_DEBUG,
906 "PMK from FT - skip IEEE 802.1X/EAP");
907 /* Setup EAPOL state machines to already authenticated state
908 * because of existing FT information from R0KH. */
909 sta->eapol_sm->keyRun = TRUE;
910 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
911 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
912 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
913 sta->eapol_sm->authSuccess = TRUE;
914 if (sta->eapol_sm->eap)
915 eap_sm_notify_cached(sta->eapol_sm->eap);
916 /* TODO: get vlan_id from R0KH using RRB message */
917 return;
918 }
919#endif /* CONFIG_IEEE80211R */
920
6fc6879b
JM		 921 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
922 if (pmksa) {
923 int old_vlanid;
924
925 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
926 HOSTAPD_LEVEL_DEBUG,
927 "PMK from PMKSA cache - skip IEEE 802.1X/EAP");
928 /* Setup EAPOL state machines to already authenticated state
929 * because of existing PMKSA information in the cache. */
930 sta->eapol_sm->keyRun = TRUE;
931 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
932 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
933 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
934 sta->eapol_sm->authSuccess = TRUE;
935 if (sta->eapol_sm->eap)
936 eap_sm_notify_cached(sta->eapol_sm->eap);
937 old_vlanid = sta->vlan_id;
938 pmksa_cache_to_eapol_data(pmksa, sta->eapol_sm);
939 if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
940 sta->vlan_id = 0;
941 ap_sta_bind_vlan(hapd, sta, old_vlanid);
942 } else {
943 if (reassoc) {
944 /*
945 * Force EAPOL state machines to start
946 * re-authentication without having to wait for the
947 * Supplicant to send EAPOL-Start.
948 */
949 sta->eapol_sm->reAuthenticate = TRUE;
950 }
951 eapol_auth_step(sta->eapol_sm);
952 }
953}
954
955
6fc6879b
JM		 956void ieee802_1x_free_station(struct sta_info *sta)
957{
958 struct eapol_state_machine *sm = sta->eapol_sm;
959
6fc6879b
JM		 960 if (sm == NULL)
961 return;
962
963 sta->eapol_sm = NULL;
964
f88bd288 965#ifndef CONFIG_NO_RADIUS
9e7245bd 966 radius_msg_free(sm->last_recv_radius);
010dc068 967 radius_free_class(&sm->radius_class);
f88bd288 968#endif /* CONFIG_NO_RADIUS */
6fc6879b
JM		 969
970 os_free(sm->identity);
6fc6879b
JM		 971 eapol_auth_free(sm);
972}
973
974
f88bd288 975#ifndef CONFIG_NO_RADIUS
6fc6879b
JM		 976static void ieee802_1x_decapsulate_radius(struct hostapd_data *hapd,
977 struct sta_info *sta)
978{
979 u8 *eap;
980 size_t len;
981 struct eap_hdr *hdr;
982 int eap_type = -1;
983 char buf[64];
984 struct radius_msg *msg;
985 struct eapol_state_machine *sm = sta->eapol_sm;
986
987 if (sm == NULL || sm->last_recv_radius == NULL) {
988 if (sm)
989 sm->eap_if->aaaEapNoReq = TRUE;
990 return;
991 }
992
993 msg = sm->last_recv_radius;
994
995 eap = radius_msg_get_eap(msg, &len);
996 if (eap == NULL) {
997 /* RFC 3579, Chap. 2.6.3:
998 * RADIUS server SHOULD NOT send Access-Reject/no EAP-Message
999 * attribute */
1000 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1001 HOSTAPD_LEVEL_WARNING, "could not extract "
1002 "EAP-Message from RADIUS message");
1003 sm->eap_if->aaaEapNoReq = TRUE;
1004 return;
1005 }
1006
1007 if (len < sizeof(*hdr)) {
1008 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1009 HOSTAPD_LEVEL_WARNING, "too short EAP packet "
1010 "received from authentication server");
1011 os_free(eap);
1012 sm->eap_if->aaaEapNoReq = TRUE;
1013 return;
1014 }
1015
1016 if (len > sizeof(*hdr))
1017 eap_type = eap[sizeof(*hdr)];
1018
1019 hdr = (struct eap_hdr *) eap;
1020 switch (hdr->code) {
1021 case EAP_CODE_REQUEST:
1022 if (eap_type >= 0)
1023 sm->eap_type_authsrv = eap_type;
1024 os_snprintf(buf, sizeof(buf), "EAP-Request-%s (%d)",
2773ca09
JM		 1025 eap_type >= 0 ? eap_server_get_name(0, eap_type) :
1026 "??",
6fc6879b
JM		 1027 eap_type);
1028 break;
1029 case EAP_CODE_RESPONSE:
1030 os_snprintf(buf, sizeof(buf), "EAP Response-%s (%d)",
2773ca09
JM		 1031 eap_type >= 0 ? eap_server_get_name(0, eap_type) :
1032 "??",
6fc6879b
JM		 1033 eap_type);
1034 break;
1035 case EAP_CODE_SUCCESS:
1036 os_strlcpy(buf, "EAP Success", sizeof(buf));
1037 break;
1038 case EAP_CODE_FAILURE:
1039 os_strlcpy(buf, "EAP Failure", sizeof(buf));
1040 break;
1041 default:
1042 os_strlcpy(buf, "unknown EAP code", sizeof(buf));
1043 break;
1044 }
1045 buf[sizeof(buf) - 1] = '\0';
1046 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1047 HOSTAPD_LEVEL_DEBUG, "decapsulated EAP packet (code=%d "
1048 "id=%d len=%d) from RADIUS server: %s",
1049 hdr->code, hdr->identifier, be_to_host16(hdr->length),
1050 buf);
1051 sm->eap_if->aaaEapReq = TRUE;
1052
1053 wpabuf_free(sm->eap_if->aaaEapReqData);
1054 sm->eap_if->aaaEapReqData = wpabuf_alloc_ext_data(eap, len);
1055}
1056
1057
1058static void ieee802_1x_get_keys(struct hostapd_data *hapd,
1059 struct sta_info *sta, struct radius_msg *msg,
1060 struct radius_msg *req,
7d02e641
JM		 1061 const u8 *shared_secret,
1062 size_t shared_secret_len)
6fc6879b
JM		 1063{
1064 struct radius_ms_mppe_keys *keys;
1065 struct eapol_state_machine *sm = sta->eapol_sm;
1066 if (sm == NULL)
1067 return;
1068
1069 keys = radius_msg_get_ms_keys(msg, req, shared_secret,
1070 shared_secret_len);
1071
1072 if (keys && keys->send && keys->recv) {
1073 size_t len = keys->send_len + keys->recv_len;
1074 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Send-Key",
1075 keys->send, keys->send_len);
1076 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Recv-Key",
1077 keys->recv, keys->recv_len);
1078
1079 os_free(sm->eap_if->aaaEapKeyData);
1080 sm->eap_if->aaaEapKeyData = os_malloc(len);
1081 if (sm->eap_if->aaaEapKeyData) {
1082 os_memcpy(sm->eap_if->aaaEapKeyData, keys->recv,
1083 keys->recv_len);
1084 os_memcpy(sm->eap_if->aaaEapKeyData + keys->recv_len,
1085 keys->send, keys->send_len);
1086 sm->eap_if->aaaEapKeyDataLen = len;
1087 sm->eap_if->aaaEapKeyAvailable = TRUE;
1088 }
1089 }
1090
1091 if (keys) {
1092 os_free(keys->send);
1093 os_free(keys->recv);
1094 os_free(keys);
1095 }
1096}
1097
1098
1099static void ieee802_1x_store_radius_class(struct hostapd_data *hapd,
1100 struct sta_info *sta,
1101 struct radius_msg *msg)
1102{
1103 u8 *class;
1104 size_t class_len;
1105 struct eapol_state_machine *sm = sta->eapol_sm;
1106 int count, i;
1107 struct radius_attr_data *nclass;
1108 size_t nclass_count;
1109
1110 if (!hapd->conf->radius->acct_server || hapd->radius == NULL ||
1111 sm == NULL)
1112 return;
1113
010dc068 1114 radius_free_class(&sm->radius_class);
6fc6879b
JM		 1115 count = radius_msg_count_attr(msg, RADIUS_ATTR_CLASS, 1);
1116 if (count <= 0)
1117 return;
1118
1119 nclass = os_zalloc(count * sizeof(struct radius_attr_data));
1120 if (nclass == NULL)
1121 return;
1122
1123 nclass_count = 0;
1124
1125 class = NULL;
1126 for (i = 0; i < count; i++) {
1127 do {
1128 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CLASS,
1129 &class, &class_len,
1130 class) < 0) {
1131 i = count;
1132 break;
1133 }
1134 } while (class_len < 1);
1135
1136 nclass[nclass_count].data = os_malloc(class_len);
1137 if (nclass[nclass_count].data == NULL)
1138 break;
1139
1140 os_memcpy(nclass[nclass_count].data, class, class_len);
1141 nclass[nclass_count].len = class_len;
1142 nclass_count++;
1143 }
1144
1145 sm->radius_class.attr = nclass;
1146 sm->radius_class.count = nclass_count;
1147 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Stored %lu RADIUS Class "
1148 "attributes for " MACSTR,
1149 (unsigned long) sm->radius_class.count,
1150 MAC2STR(sta->addr));
1151}
1152
1153
1154/* Update sta->identity based on User-Name attribute in Access-Accept */
1155static void ieee802_1x_update_sta_identity(struct hostapd_data *hapd,
1156 struct sta_info *sta,
1157 struct radius_msg *msg)
1158{
1159 u8 *buf, *identity;
1160 size_t len;
1161 struct eapol_state_machine *sm = sta->eapol_sm;
1162
1163 if (sm == NULL)
1164 return;
1165
1166 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_USER_NAME, &buf, &len,
1167 NULL) < 0)
1168 return;
1169
1170 identity = os_malloc(len + 1);
1171 if (identity == NULL)
1172 return;
1173
1174 os_memcpy(identity, buf, len);
1175 identity[len] = '\0';
1176
1177 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1178 HOSTAPD_LEVEL_DEBUG, "old identity '%s' updated with "
1179 "User-Name from Access-Accept '%s'",
1180 sm->identity ? (char *) sm->identity : "N/A",
1181 (char *) identity);
1182
1183 os_free(sm->identity);
1184 sm->identity = identity;
1185 sm->identity_len = len;
1186}
1187
1188
1189struct sta_id_search {
1190 u8 identifier;
1191 struct eapol_state_machine *sm;
1192};
1193
1194
1195static int ieee802_1x_select_radius_identifier(struct hostapd_data *hapd,
1196 struct sta_info *sta,
1197 void *ctx)
1198{
1199 struct sta_id_search *id_search = ctx;
1200 struct eapol_state_machine *sm = sta->eapol_sm;
1201
1202 if (sm && sm->radius_identifier >= 0 &&
1203 sm->radius_identifier == id_search->identifier) {
1204 id_search->sm = sm;
1205 return 1;
1206 }
1207 return 0;
1208}
1209
1210
1211static struct eapol_state_machine *
1212ieee802_1x_search_radius_identifier(struct hostapd_data *hapd, u8 identifier)
1213{
1214 struct sta_id_search id_search;
1215 id_search.identifier = identifier;
1216 id_search.sm = NULL;
1217 ap_for_each_sta(hapd, ieee802_1x_select_radius_identifier, &id_search);
1218 return id_search.sm;
1219}
1220
1221
1c6e69cc
JM		 1222/**
1223 * ieee802_1x_receive_auth - Process RADIUS frames from Authentication Server
1224 * @msg: RADIUS response message
1225 * @req: RADIUS request message
1226 * @shared_secret: RADIUS shared secret
1227 * @shared_secret_len: Length of shared_secret in octets
1228 * @data: Context data (struct hostapd_data *)
1229 * Returns: Processing status
1230 */
6fc6879b
JM		 1231static RadiusRxResult
1232ieee802_1x_receive_auth(struct radius_msg *msg, struct radius_msg *req,
7d02e641 1233 const u8 *shared_secret, size_t shared_secret_len,
6fc6879b
JM		 1234 void *data)
1235{
1236 struct hostapd_data *hapd = data;
1237 struct sta_info *sta;
1238 u32 session_timeout = 0, termination_action, acct_interim_interval;
1239 int session_timeout_set, old_vlanid = 0;
6fc6879b
JM		 1240 struct eapol_state_machine *sm;
1241 int override_eapReq = 0;
1489e11a 1242 struct radius_hdr *hdr = radius_msg_get_hdr(msg);
6fc6879b 1243
1489e11a 1244 sm = ieee802_1x_search_radius_identifier(hapd, hdr->identifier);
6fc6879b
JM		 1245 if (sm == NULL) {
1246 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Could not find matching "
1247 "station for this RADIUS message");
1248 return RADIUS_RX_UNKNOWN;
1249 }
1250 sta = sm->sta;
1251
1252 /* RFC 2869, Ch. 5.13: valid Message-Authenticator attribute MUST be
1253 * present when packet contains an EAP-Message attribute */
1489e11a 1254 if (hdr->code == RADIUS_CODE_ACCESS_REJECT &&
6fc6879b
JM		 1255 radius_msg_get_attr(msg, RADIUS_ATTR_MESSAGE_AUTHENTICATOR, NULL,
1256 0) < 0 &&
1257 radius_msg_get_attr(msg, RADIUS_ATTR_EAP_MESSAGE, NULL, 0) < 0) {
1258 wpa_printf(MSG_DEBUG, "Allowing RADIUS Access-Reject without "
1259 "Message-Authenticator since it does not include "
1260 "EAP-Message");
1261 } else if (radius_msg_verify(msg, shared_secret, shared_secret_len,
1262 req, 1)) {
1263 printf("Incoming RADIUS packet did not have correct "
1264 "Message-Authenticator - dropped\n");
1265 return RADIUS_RX_INVALID_AUTHENTICATOR;
1266 }
1267
1489e11a
JM		 1268 if (hdr->code != RADIUS_CODE_ACCESS_ACCEPT &&
1269 hdr->code != RADIUS_CODE_ACCESS_REJECT &&
1270 hdr->code != RADIUS_CODE_ACCESS_CHALLENGE) {
6fc6879b
JM		 1271 printf("Unknown RADIUS message code\n");
1272 return RADIUS_RX_UNKNOWN;
1273 }
1274
1275 sm->radius_identifier = -1;
1276 wpa_printf(MSG_DEBUG, "RADIUS packet matching with station " MACSTR,
1277 MAC2STR(sta->addr));
1278
9e7245bd 1279 radius_msg_free(sm->last_recv_radius);
6fc6879b
JM		 1280 sm->last_recv_radius = msg;
1281
1282 session_timeout_set =
1283 !radius_msg_get_attr_int32(msg, RADIUS_ATTR_SESSION_TIMEOUT,
1284 &session_timeout);
1285 if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_TERMINATION_ACTION,
1286 &termination_action))
1287 termination_action = RADIUS_TERMINATION_ACTION_DEFAULT;
1288
5843e1c9 1289 if (hapd->conf->acct_interim_interval == 0 &&
1489e11a 1290 hdr->code == RADIUS_CODE_ACCESS_ACCEPT &&
6fc6879b
JM		 1291 radius_msg_get_attr_int32(msg, RADIUS_ATTR_ACCT_INTERIM_INTERVAL,
1292 &acct_interim_interval) == 0) {
1293 if (acct_interim_interval < 60) {
1294 hostapd_logger(hapd, sta->addr,
1295 HOSTAPD_MODULE_IEEE8021X,
1296 HOSTAPD_LEVEL_INFO,
1297 "ignored too small "
1298 "Acct-Interim-Interval %d",
1299 acct_interim_interval);
1300 } else
1301 sta->acct_interim_interval = acct_interim_interval;
1302 }
1303
1304
1489e11a 1305 switch (hdr->code) {
6fc6879b
JM		 1306 case RADIUS_CODE_ACCESS_ACCEPT:
1307 if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
1308 sta->vlan_id = 0;
30b32314 1309#ifndef CONFIG_NO_VLAN
6fc6879b
JM		 1310 else {
1311 old_vlanid = sta->vlan_id;
1312 sta->vlan_id = radius_msg_get_vlanid(msg);
1313 }
1314 if (sta->vlan_id > 0 &&
1315 hostapd_get_vlan_id_ifname(hapd->conf->vlan,
1316 sta->vlan_id)) {
1317 hostapd_logger(hapd, sta->addr,
1318 HOSTAPD_MODULE_RADIUS,
1319 HOSTAPD_LEVEL_INFO,
1320 "VLAN ID %d", sta->vlan_id);
1321 } else if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_REQUIRED) {
1322 sta->eapol_sm->authFail = TRUE;
1323 hostapd_logger(hapd, sta->addr,
1324 HOSTAPD_MODULE_IEEE8021X,
1325 HOSTAPD_LEVEL_INFO, "authentication "
1326 "server did not include required VLAN "
1327 "ID in Access-Accept");
1328 break;
1329 }
30b32314 1330#endif /* CONFIG_NO_VLAN */
6fc6879b 1331
4254100d
JM		 1332 if (ap_sta_bind_vlan(hapd, sta, old_vlanid) < 0)
1333 break;
6fc6879b
JM		 1334
1335 /* RFC 3580, Ch. 3.17 */
1336 if (session_timeout_set && termination_action ==
1337 RADIUS_TERMINATION_ACTION_RADIUS_REQUEST) {
1338 sm->reAuthPeriod = session_timeout;
1339 } else if (session_timeout_set)
1340 ap_sta_session_timeout(hapd, sta, session_timeout);
1341
1342 sm->eap_if->aaaSuccess = TRUE;
1343 override_eapReq = 1;
1344 ieee802_1x_get_keys(hapd, sta, msg, req, shared_secret,
1345 shared_secret_len);
1346 ieee802_1x_store_radius_class(hapd, sta, msg);
1347 ieee802_1x_update_sta_identity(hapd, sta, msg);
1348 if (sm->eap_if->eapKeyAvailable &&
1349 wpa_auth_pmksa_add(sta->wpa_sm, sm->eapol_key_crypt,
1350 session_timeout_set ?
1351 (int) session_timeout : -1, sm) == 0) {
1352 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
1353 HOSTAPD_LEVEL_DEBUG,
1354 "Added PMKSA cache entry");
1355 }
1356 break;
1357 case RADIUS_CODE_ACCESS_REJECT:
1358 sm->eap_if->aaaFail = TRUE;
1359 override_eapReq = 1;
1360 break;
1361 case RADIUS_CODE_ACCESS_CHALLENGE:
1362 sm->eap_if->aaaEapReq = TRUE;
1363 if (session_timeout_set) {
1364 /* RFC 2869, Ch. 2.3.2; RFC 3580, Ch. 3.17 */
8e09c6d2
JM		 1365 sm->eap_if->aaaMethodTimeout = session_timeout;
1366 hostapd_logger(hapd, sm->addr,
1367 HOSTAPD_MODULE_IEEE8021X,
1368 HOSTAPD_LEVEL_DEBUG,
1369 "using EAP timeout of %d seconds (from "
1370 "RADIUS)",
1371 sm->eap_if->aaaMethodTimeout);
1372 } else {
1373 /*
1374 * Use dynamic retransmission behavior per EAP
1375 * specification.
1376 */
1377 sm->eap_if->aaaMethodTimeout = 0;
1378 }
6fc6879b
JM		 1379 break;
1380 }
1381
1382 ieee802_1x_decapsulate_radius(hapd, sta);
1383 if (override_eapReq)
1384 sm->eap_if->aaaEapReq = FALSE;
1385
1386 eapol_auth_step(sm);
1387
1388 return RADIUS_RX_QUEUED;
1389}
f88bd288 1390#endif /* CONFIG_NO_RADIUS */
6fc6879b
JM		 1391
1392
1393void ieee802_1x_abort_auth(struct hostapd_data *hapd, struct sta_info *sta)
1394{
1395 struct eapol_state_machine *sm = sta->eapol_sm;
1396 if (sm == NULL)
1397 return;
1398
1399 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1400 HOSTAPD_LEVEL_DEBUG, "aborting authentication");
1401
f88bd288 1402#ifndef CONFIG_NO_RADIUS
9e7245bd
JM		 1403 radius_msg_free(sm->last_recv_radius);
1404 sm->last_recv_radius = NULL;
f88bd288 1405#endif /* CONFIG_NO_RADIUS */
805e6dc6
JM		 1406
1407 if (sm->eap_if->eapTimeout) {
1408 /*
1409 * Disconnect the STA since it did not reply to the last EAP
1410 * request and we cannot continue EAP processing (EAP-Failure
1411 * could only be sent if the EAP peer actually replied).
1412 */
1413 sm->eap_if->portEnabled = FALSE;
45cefa0b
JM		 1414 ap_sta_disconnect(hapd, sta, sta->addr,
1415 WLAN_REASON_PREV_AUTH_NOT_VALID);
805e6dc6 1416 }
6fc6879b
JM		 1417}
1418
1419
6fc6879b
JM		 1420static int ieee802_1x_rekey_broadcast(struct hostapd_data *hapd)
1421{
f55802e8
JM		 1422 struct eapol_authenticator *eapol = hapd->eapol_auth;
1423
6fc6879b
JM		 1424 if (hapd->conf->default_wep_key_len < 1)
1425 return 0;
1426
f55802e8
JM		 1427 os_free(eapol->default_wep_key);
1428 eapol->default_wep_key = os_malloc(hapd->conf->default_wep_key_len);
1429 if (eapol->default_wep_key == NULL ||
3642c431
JM		 1430 random_get_bytes(eapol->default_wep_key,
1431 hapd->conf->default_wep_key_len)) {
6fc6879b 1432 printf("Could not generate random WEP key.\n");
f55802e8
JM		 1433 os_free(eapol->default_wep_key);
1434 eapol->default_wep_key = NULL;
6fc6879b
JM		 1435 return -1;
1436 }
1437
1438 wpa_hexdump_key(MSG_DEBUG, "IEEE 802.1X: New default WEP key",
f55802e8 1439 eapol->default_wep_key,
6fc6879b
JM		 1440 hapd->conf->default_wep_key_len);
1441
1442 return 0;
1443}
1444
1445
1446static int ieee802_1x_sta_key_available(struct hostapd_data *hapd,
1447 struct sta_info *sta, void *ctx)
1448{
1449 if (sta->eapol_sm) {
1450 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
1451 eapol_auth_step(sta->eapol_sm);
1452 }
1453 return 0;
1454}
1455
1456
1457static void ieee802_1x_rekey(void *eloop_ctx, void *timeout_ctx)
1458{
1459 struct hostapd_data *hapd = eloop_ctx;
f55802e8 1460 struct eapol_authenticator *eapol = hapd->eapol_auth;
6fc6879b 1461
f55802e8
JM		 1462 if (eapol->default_wep_key_idx >= 3)
1463 eapol->default_wep_key_idx =
6fc6879b
JM		 1464 hapd->conf->individual_wep_key_len > 0 ? 1 : 0;
1465 else
f55802e8 1466 eapol->default_wep_key_idx++;
6fc6879b
JM		 1467
1468 wpa_printf(MSG_DEBUG, "IEEE 802.1X: New default WEP key index %d",
f55802e8 1469 eapol->default_wep_key_idx);
6fc6879b
JM		 1470
1471 if (ieee802_1x_rekey_broadcast(hapd)) {
1472 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1473 HOSTAPD_LEVEL_WARNING, "failed to generate a "
1474 "new broadcast key");
f55802e8
JM		 1475 os_free(eapol->default_wep_key);
1476 eapol->default_wep_key = NULL;
6fc6879b
JM		 1477 return;
1478 }
1479
1480 /* TODO: Could setup key for RX here, but change default TX keyid only
1481 * after new broadcast key has been sent to all stations. */
0382097e
JM		 1482 if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
1483 broadcast_ether_addr,
3acdf771
JM		 1484 eapol->default_wep_key_idx, 1, NULL, 0,
1485 eapol->default_wep_key,
1486 hapd->conf->default_wep_key_len)) {
6fc6879b
JM		 1487 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1488 HOSTAPD_LEVEL_WARNING, "failed to configure a "
1489 "new broadcast key");
f55802e8
JM		 1490 os_free(eapol->default_wep_key);
1491 eapol->default_wep_key = NULL;
6fc6879b
JM		 1492 return;
1493 }
1494
1495 ap_for_each_sta(hapd, ieee802_1x_sta_key_available, NULL);
1496
1497 if (hapd->conf->wep_rekeying_period > 0) {
1498 eloop_register_timeout(hapd->conf->wep_rekeying_period, 0,
1499 ieee802_1x_rekey, hapd, NULL);
1500 }
1501}
1502
1503
1504static void ieee802_1x_eapol_send(void *ctx, void *sta_ctx, u8 type,
1505 const u8 *data, size_t datalen)
1506{
4e22adb4
JM		 1507#ifdef CONFIG_WPS
1508 struct sta_info *sta = sta_ctx;
1509
1510 if ((sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) ==
1511 WLAN_STA_MAYBE_WPS) {
1512 const u8 *identity;
1513 size_t identity_len;
1514 struct eapol_state_machine *sm = sta->eapol_sm;
1515
1516 identity = eap_get_identity(sm->eap, &identity_len);
1517 if (identity &&
1518 ((identity_len == WSC_ID_ENROLLEE_LEN &&
1519 os_memcmp(identity, WSC_ID_ENROLLEE,
1520 WSC_ID_ENROLLEE_LEN) == 0) ||
1521 (identity_len == WSC_ID_REGISTRAR_LEN &&
1522 os_memcmp(identity, WSC_ID_REGISTRAR,
1523 WSC_ID_REGISTRAR_LEN) == 0))) {
1524 wpa_printf(MSG_DEBUG, "WPS: WLAN_STA_MAYBE_WPS -> "
1525 "WLAN_STA_WPS");
1526 sta->flags |= WLAN_STA_WPS;
1527 }
1528 }
1529#endif /* CONFIG_WPS */
1530
6fc6879b
JM		 1531 ieee802_1x_send(ctx, sta_ctx, type, data, datalen);
1532}
1533
1534
1535static void ieee802_1x_aaa_send(void *ctx, void *sta_ctx,
1536 const u8 *data, size_t datalen)
1537{
f88bd288 1538#ifndef CONFIG_NO_RADIUS
6fc6879b
JM		 1539 struct hostapd_data *hapd = ctx;
1540 struct sta_info *sta = sta_ctx;
1541
1542 ieee802_1x_encapsulate_radius(hapd, sta, data, datalen);
f88bd288 1543#endif /* CONFIG_NO_RADIUS */
6fc6879b
JM		 1544}
1545
1546
1547static void _ieee802_1x_finished(void *ctx, void *sta_ctx, int success,
1548 int preauth)
1549{
1550 struct hostapd_data *hapd = ctx;
1551 struct sta_info *sta = sta_ctx;
1552 if (preauth)
1553 rsn_preauth_finished(hapd, sta, success);
1554 else
1555 ieee802_1x_finished(hapd, sta, success);
1556}
1557
1558
1559static int ieee802_1x_get_eap_user(void *ctx, const u8 *identity,
1560 size_t identity_len, int phase2,
1561 struct eap_user *user)
1562{
1563 struct hostapd_data *hapd = ctx;
1564 const struct hostapd_eap_user *eap_user;
1565 int i, count;
1566
1567 eap_user = hostapd_get_eap_user(hapd->conf, identity,
1568 identity_len, phase2);
1569 if (eap_user == NULL)
1570 return -1;
1571
1572 os_memset(user, 0, sizeof(*user));
1573 user->phase2 = phase2;
1574 count = EAP_USER_MAX_METHODS;
1575 if (count > EAP_MAX_METHODS)
1576 count = EAP_MAX_METHODS;
1577 for (i = 0; i < count; i++) {
1578 user->methods[i].vendor = eap_user->methods[i].vendor;
1579 user->methods[i].method = eap_user->methods[i].method;
1580 }
1581
1582 if (eap_user->password) {
1583 user->password = os_malloc(eap_user->password_len);
1584 if (user->password == NULL)
1585 return -1;
1586 os_memcpy(user->password, eap_user->password,
1587 eap_user->password_len);
1588 user->password_len = eap_user->password_len;
1589 }
1590 user->force_version = eap_user->force_version;
1591 user->ttls_auth = eap_user->ttls_auth;
1592
1593 return 0;
1594}
1595
1596
1597static int ieee802_1x_sta_entry_alive(void *ctx, const u8 *addr)
1598{
1599 struct hostapd_data *hapd = ctx;
1600 struct sta_info *sta;
1601 sta = ap_get_sta(hapd, addr);
1602 if (sta == NULL || sta->eapol_sm == NULL)
1603 return 0;
1604 return 1;
1605}
1606
1607
1608static void ieee802_1x_logger(void *ctx, const u8 *addr,
1609 eapol_logger_level level, const char *txt)
1610{
71f04b3c 1611#ifndef CONFIG_NO_HOSTAPD_LOGGER
6fc6879b
JM		 1612 struct hostapd_data *hapd = ctx;
1613 int hlevel;
1614
1615 switch (level) {
1616 case EAPOL_LOGGER_WARNING:
1617 hlevel = HOSTAPD_LEVEL_WARNING;
1618 break;
1619 case EAPOL_LOGGER_INFO:
1620 hlevel = HOSTAPD_LEVEL_INFO;
1621 break;
1622 case EAPOL_LOGGER_DEBUG:
1623 default:
1624 hlevel = HOSTAPD_LEVEL_DEBUG;
1625 break;
1626 }
1627
1628 hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE8021X, hlevel, "%s",
1629 txt);
71f04b3c 1630#endif /* CONFIG_NO_HOSTAPD_LOGGER */
6fc6879b
JM		 1631}
1632
1633
1634static void ieee802_1x_set_port_authorized(void *ctx, void *sta_ctx,
1635 int authorized)
1636{
1637 struct hostapd_data *hapd = ctx;
1638 struct sta_info *sta = sta_ctx;
1639 ieee802_1x_set_sta_authorized(hapd, sta, authorized);
1640}
1641
1642
1643static void _ieee802_1x_abort_auth(void *ctx, void *sta_ctx)
1644{
1645 struct hostapd_data *hapd = ctx;
1646 struct sta_info *sta = sta_ctx;
1647 ieee802_1x_abort_auth(hapd, sta);
1648}
1649
1650
1651static void _ieee802_1x_tx_key(void *ctx, void *sta_ctx)
1652{
1653 struct hostapd_data *hapd = ctx;
1654 struct sta_info *sta = sta_ctx;
1655 ieee802_1x_tx_key(hapd, sta);
1656}
1657
1658
38294200
JM		 1659static void ieee802_1x_eapol_event(void *ctx, void *sta_ctx,
1660 enum eapol_event type)
1661{
1662 /* struct hostapd_data *hapd = ctx; */
1663 struct sta_info *sta = sta_ctx;
1664 switch (type) {
1665 case EAPOL_AUTH_SM_CHANGE:
1666 wpa_auth_sm_notify(sta->wpa_sm);
1667 break;
1668 case EAPOL_AUTH_REAUTHENTICATE:
1669 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
1670 break;
1671 }
1672}
1673
1674
6fc6879b
JM		 1675int ieee802_1x_init(struct hostapd_data *hapd)
1676{
1677 int i;
1678 struct eapol_auth_config conf;
1679 struct eapol_auth_cb cb;
1680
1681 os_memset(&conf, 0, sizeof(conf));
a2befd37 1682 conf.ctx = hapd;
6fc6879b
JM		 1683 conf.eap_reauth_period = hapd->conf->eap_reauth_period;
1684 conf.wpa = hapd->conf->wpa;
1685 conf.individual_wep_key_len = hapd->conf->individual_wep_key_len;
1686 conf.eap_server = hapd->conf->eap_server;
1687 conf.ssl_ctx = hapd->ssl_ctx;
bb437f28 1688 conf.msg_ctx = hapd->msg_ctx;
6fc6879b
JM		 1689 conf.eap_sim_db_priv = hapd->eap_sim_db_priv;
1690 conf.eap_req_id_text = hapd->conf->eap_req_id_text;
1691 conf.eap_req_id_text_len = hapd->conf->eap_req_id_text_len;
1692 conf.pac_opaque_encr_key = hapd->conf->pac_opaque_encr_key;
1693 conf.eap_fast_a_id = hapd->conf->eap_fast_a_id;
2d867244
JM		 1694 conf.eap_fast_a_id_len = hapd->conf->eap_fast_a_id_len;
1695 conf.eap_fast_a_id_info = hapd->conf->eap_fast_a_id_info;
378eae5e 1696 conf.eap_fast_prov = hapd->conf->eap_fast_prov;
a11c90a6
JM		 1697 conf.pac_key_lifetime = hapd->conf->pac_key_lifetime;
1698 conf.pac_key_refresh_time = hapd->conf->pac_key_refresh_time;
6fc6879b 1699 conf.eap_sim_aka_result_ind = hapd->conf->eap_sim_aka_result_ind;
c3e258ae 1700 conf.tnc = hapd->conf->tnc;
ad08c363 1701 conf.wps = hapd->wps;
7f6ec672 1702 conf.fragment_size = hapd->conf->fragment_size;
df684d82 1703 conf.pwd_group = hapd->conf->pwd_group;
fa516558 1704 conf.pbc_in_m1 = hapd->conf->pbc_in_m1;
6fc6879b
JM		 1705
1706 os_memset(&cb, 0, sizeof(cb));
1707 cb.eapol_send = ieee802_1x_eapol_send;
1708 cb.aaa_send = ieee802_1x_aaa_send;
1709 cb.finished = _ieee802_1x_finished;
1710 cb.get_eap_user = ieee802_1x_get_eap_user;
1711 cb.sta_entry_alive = ieee802_1x_sta_entry_alive;
1712 cb.logger = ieee802_1x_logger;
1713 cb.set_port_authorized = ieee802_1x_set_port_authorized;
1714 cb.abort_auth = _ieee802_1x_abort_auth;
1715 cb.tx_key = _ieee802_1x_tx_key;
38294200 1716 cb.eapol_event = ieee802_1x_eapol_event;
6fc6879b
JM		 1717
1718 hapd->eapol_auth = eapol_auth_init(&conf, &cb);
1719 if (hapd->eapol_auth == NULL)
1720 return -1;
1721
1722 if ((hapd->conf->ieee802_1x || hapd->conf->wpa) &&
0e8a96a9 1723 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 1))
6fc6879b
JM		 1724 return -1;
1725
f88bd288 1726#ifndef CONFIG_NO_RADIUS
6fc6879b
JM		 1727 if (radius_client_register(hapd->radius, RADIUS_AUTH,
1728 ieee802_1x_receive_auth, hapd))
1729 return -1;
f88bd288 1730#endif /* CONFIG_NO_RADIUS */
6fc6879b
JM		 1731
1732 if (hapd->conf->default_wep_key_len) {
6fc6879b 1733 for (i = 0; i < 4; i++)
3acdf771
JM		 1734 hostapd_drv_set_key(hapd->conf->iface, hapd,
1735 WPA_ALG_NONE, NULL, i, 0, NULL, 0,
1736 NULL, 0);
6fc6879b
JM		 1737
1738 ieee802_1x_rekey(hapd, NULL);
1739
f55802e8 1740 if (hapd->eapol_auth->default_wep_key == NULL)
6fc6879b
JM		 1741 return -1;
1742 }
1743
1744 return 0;
1745}
1746
1747
1748void ieee802_1x_deinit(struct hostapd_data *hapd)
1749{
1750 eloop_cancel_timeout(ieee802_1x_rekey, hapd, NULL);
1751
1752 if (hapd->driver != NULL &&
1753 (hapd->conf->ieee802_1x || hapd->conf->wpa))
0e8a96a9 1754 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0);
6fc6879b
JM		 1755
1756 eapol_auth_deinit(hapd->eapol_auth);
1757 hapd->eapol_auth = NULL;
1758}
1759
1760
6fc6879b 1761int ieee802_1x_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
8607f4c3 1762 const u8 *buf, size_t len, int ack)
6fc6879b
JM		 1763{
1764 struct ieee80211_hdr *hdr;
1765 struct ieee802_1x_hdr *xhdr;
1766 struct ieee802_1x_eapol_key *key;
1767 u8 *pos;
1768 const unsigned char rfc1042_hdr[ETH_ALEN] =
1769 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
1770
1771 if (sta == NULL)
1772 return -1;
1773 if (len < sizeof(*hdr) + sizeof(rfc1042_hdr) + 2 + sizeof(*xhdr))
1774 return 0;
1775
1776 hdr = (struct ieee80211_hdr *) buf;
1777 pos = (u8 *) (hdr + 1);
1778 if (os_memcmp(pos, rfc1042_hdr, sizeof(rfc1042_hdr)) != 0)
1779 return 0;
1780 pos += sizeof(rfc1042_hdr);
1781 if (WPA_GET_BE16(pos) != ETH_P_PAE)
1782 return 0;
1783 pos += 2;
1784
1785 xhdr = (struct ieee802_1x_hdr *) pos;
1786 pos += sizeof(*xhdr);
1787
1788 wpa_printf(MSG_DEBUG, "IEEE 802.1X: " MACSTR " TX status - version=%d "
1789 "type=%d length=%d - ack=%d",
1790 MAC2STR(sta->addr), xhdr->version, xhdr->type,
1791 be_to_host16(xhdr->length), ack);
1792
e4bf4db9
JM		 1793 if (xhdr->type == IEEE802_1X_TYPE_EAPOL_KEY &&
1794 pos + sizeof(struct wpa_eapol_key) <= buf + len) {
1795 const struct wpa_eapol_key *wpa;
1796 wpa = (const struct wpa_eapol_key *) pos;
1797 if (wpa->type == EAPOL_KEY_TYPE_RSN ||
1798 wpa->type == EAPOL_KEY_TYPE_WPA)
1799 wpa_auth_eapol_key_tx_status(hapd->wpa_auth,
1800 sta->wpa_sm, ack);
1801 }
1802
6fc6879b
JM		 1803 /* EAPOL EAP-Packet packets are eventually re-sent by either Supplicant
1804 * or Authenticator state machines, but EAPOL-Key packets are not
1805 * retransmitted in case of failure. Try to re-sent failed EAPOL-Key
1806 * packets couple of times because otherwise STA keys become
1807 * unsynchronized with AP. */
1808 if (xhdr->type == IEEE802_1X_TYPE_EAPOL_KEY && !ack &&
1809 pos + sizeof(*key) <= buf + len) {
1810 key = (struct ieee802_1x_eapol_key *) pos;
1811 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1812 HOSTAPD_LEVEL_DEBUG, "did not Ack EAPOL-Key "
1813 "frame (%scast index=%d)",
1814 key->key_index & BIT(7) ? "uni" : "broad",
1815 key->key_index & ~BIT(7));
1816 /* TODO: re-send EAPOL-Key couple of times (with short delay
1817 * between them?). If all attempt fail, report error and
1818 * deauthenticate STA so that it will get new keys when
1819 * authenticating again (e.g., after returning in range).
1820 * Separate limit/transmit state needed both for unicast and
1821 * broadcast keys(?) */
1822 }
1823 /* TODO: could move unicast key configuration from ieee802_1x_tx_key()
1824 * to here and change the key only if the EAPOL-Key packet was Acked.
1825 */
1826
1827 return 1;
1828}
1829
1830
1831u8 * ieee802_1x_get_identity(struct eapol_state_machine *sm, size_t *len)
1832{
1833 if (sm == NULL || sm->identity == NULL)
1834 return NULL;
1835
1836 *len = sm->identity_len;
1837 return sm->identity;
1838}
1839
1840
1841u8 * ieee802_1x_get_radius_class(struct eapol_state_machine *sm, size_t *len,
1842 int idx)
1843{
1844 if (sm == NULL || sm->radius_class.attr == NULL ||
1845 idx >= (int) sm->radius_class.count)
1846 return NULL;
1847
1848 *len = sm->radius_class.attr[idx].len;
1849 return sm->radius_class.attr[idx].data;
1850}
1851
1852
1853const u8 * ieee802_1x_get_key(struct eapol_state_machine *sm, size_t *len)
1854{
1855 if (sm == NULL)
1856 return NULL;
1857
1858 *len = sm->eap_if->eapKeyDataLen;
1859 return sm->eap_if->eapKeyData;
1860}
1861
1862
1863void ieee802_1x_notify_port_enabled(struct eapol_state_machine *sm,
1864 int enabled)
1865{
1866 if (sm == NULL)
1867 return;
1868 sm->eap_if->portEnabled = enabled ? TRUE : FALSE;
1869 eapol_auth_step(sm);
1870}
1871
1872
1873void ieee802_1x_notify_port_valid(struct eapol_state_machine *sm,
1874 int valid)
1875{
1876 if (sm == NULL)
1877 return;
1878 sm->portValid = valid ? TRUE : FALSE;
1879 eapol_auth_step(sm);
1880}
1881
1882
1883void ieee802_1x_notify_pre_auth(struct eapol_state_machine *sm, int pre_auth)
1884{
1885 if (sm == NULL)
1886 return;
1887 if (pre_auth)
1888 sm->flags |= EAPOL_SM_PREAUTH;
1889 else
1890 sm->flags &= ~EAPOL_SM_PREAUTH;
1891}
1892
1893
1894static const char * bool_txt(Boolean bool)
1895{
1896 return bool ? "TRUE" : "FALSE";
1897}
1898
1899
1900int ieee802_1x_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
1901{
1902 /* TODO */
1903 return 0;
1904}
1905
1906
1907int ieee802_1x_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
1908 char *buf, size_t buflen)
1909{
1910 int len = 0, ret;
1911 struct eapol_state_machine *sm = sta->eapol_sm;
1912
1913 if (sm == NULL)
1914 return 0;
1915
1916 ret = os_snprintf(buf + len, buflen - len,
1917 "dot1xPaePortNumber=%d\n"
1918 "dot1xPaePortProtocolVersion=%d\n"
1919 "dot1xPaePortCapabilities=1\n"
1920 "dot1xPaePortInitialize=%d\n"
1921 "dot1xPaePortReauthenticate=FALSE\n",
1922 sta->aid,
1923 EAPOL_VERSION,
1924 sm->initialize);
1925 if (ret < 0 || (size_t) ret >= buflen - len)
1926 return len;
1927 len += ret;
1928
1929 /* dot1xAuthConfigTable */
1930 ret = os_snprintf(buf + len, buflen - len,
1931 "dot1xAuthPaeState=%d\n"
1932 "dot1xAuthBackendAuthState=%d\n"
1933 "dot1xAuthAdminControlledDirections=%d\n"
1934 "dot1xAuthOperControlledDirections=%d\n"
1935 "dot1xAuthAuthControlledPortStatus=%d\n"
1936 "dot1xAuthAuthControlledPortControl=%d\n"
1937 "dot1xAuthQuietPeriod=%u\n"
1938 "dot1xAuthServerTimeout=%u\n"
1939 "dot1xAuthReAuthPeriod=%u\n"
1940 "dot1xAuthReAuthEnabled=%s\n"
1941 "dot1xAuthKeyTxEnabled=%s\n",
1942 sm->auth_pae_state + 1,
1943 sm->be_auth_state + 1,
1944 sm->adminControlledDirections,
1945 sm->operControlledDirections,
1946 sm->authPortStatus,
1947 sm->portControl,
1948 sm->quietPeriod,
1949 sm->serverTimeout,
1950 sm->reAuthPeriod,
1951 bool_txt(sm->reAuthEnabled),
1952 bool_txt(sm->keyTxEnabled));
1953 if (ret < 0 || (size_t) ret >= buflen - len)
1954 return len;
1955 len += ret;
1956
1957 /* dot1xAuthStatsTable */
1958 ret = os_snprintf(buf + len, buflen - len,
1959 "dot1xAuthEapolFramesRx=%u\n"
1960 "dot1xAuthEapolFramesTx=%u\n"
1961 "dot1xAuthEapolStartFramesRx=%u\n"
1962 "dot1xAuthEapolLogoffFramesRx=%u\n"
1963 "dot1xAuthEapolRespIdFramesRx=%u\n"
1964 "dot1xAuthEapolRespFramesRx=%u\n"
1965 "dot1xAuthEapolReqIdFramesTx=%u\n"
1966 "dot1xAuthEapolReqFramesTx=%u\n"
1967 "dot1xAuthInvalidEapolFramesRx=%u\n"
1968 "dot1xAuthEapLengthErrorFramesRx=%u\n"
1969 "dot1xAuthLastEapolFrameVersion=%u\n"
1970 "dot1xAuthLastEapolFrameSource=" MACSTR "\n",
1971 sm->dot1xAuthEapolFramesRx,
1972 sm->dot1xAuthEapolFramesTx,
1973 sm->dot1xAuthEapolStartFramesRx,
1974 sm->dot1xAuthEapolLogoffFramesRx,
1975 sm->dot1xAuthEapolRespIdFramesRx,
1976 sm->dot1xAuthEapolRespFramesRx,
1977 sm->dot1xAuthEapolReqIdFramesTx,
1978 sm->dot1xAuthEapolReqFramesTx,
1979 sm->dot1xAuthInvalidEapolFramesRx,
1980 sm->dot1xAuthEapLengthErrorFramesRx,
1981 sm->dot1xAuthLastEapolFrameVersion,
1982 MAC2STR(sm->addr));
1983 if (ret < 0 || (size_t) ret >= buflen - len)
1984 return len;
1985 len += ret;
1986
1987 /* dot1xAuthDiagTable */
1988 ret = os_snprintf(buf + len, buflen - len,
1989 "dot1xAuthEntersConnecting=%u\n"
1990 "dot1xAuthEapLogoffsWhileConnecting=%u\n"
1991 "dot1xAuthEntersAuthenticating=%u\n"
1992 "dot1xAuthAuthSuccessesWhileAuthenticating=%u\n"
1993 "dot1xAuthAuthTimeoutsWhileAuthenticating=%u\n"
1994 "dot1xAuthAuthFailWhileAuthenticating=%u\n"
1995 "dot1xAuthAuthEapStartsWhileAuthenticating=%u\n"
1996 "dot1xAuthAuthEapLogoffWhileAuthenticating=%u\n"
1997 "dot1xAuthAuthReauthsWhileAuthenticated=%u\n"
1998 "dot1xAuthAuthEapStartsWhileAuthenticated=%u\n"
1999 "dot1xAuthAuthEapLogoffWhileAuthenticated=%u\n"
2000 "dot1xAuthBackendResponses=%u\n"
2001 "dot1xAuthBackendAccessChallenges=%u\n"
2002 "dot1xAuthBackendOtherRequestsToSupplicant=%u\n"
2003 "dot1xAuthBackendAuthSuccesses=%u\n"
2004 "dot1xAuthBackendAuthFails=%u\n",
2005 sm->authEntersConnecting,
2006 sm->authEapLogoffsWhileConnecting,
2007 sm->authEntersAuthenticating,
2008 sm->authAuthSuccessesWhileAuthenticating,
2009 sm->authAuthTimeoutsWhileAuthenticating,
2010 sm->authAuthFailWhileAuthenticating,
2011 sm->authAuthEapStartsWhileAuthenticating,
2012 sm->authAuthEapLogoffWhileAuthenticating,
2013 sm->authAuthReauthsWhileAuthenticated,
2014 sm->authAuthEapStartsWhileAuthenticated,
2015 sm->authAuthEapLogoffWhileAuthenticated,
2016 sm->backendResponses,
2017 sm->backendAccessChallenges,
2018 sm->backendOtherRequestsToSupplicant,
2019 sm->backendAuthSuccesses,
2020 sm->backendAuthFails);
2021 if (ret < 0 || (size_t) ret >= buflen - len)
2022 return len;
2023 len += ret;
2024
2025 /* dot1xAuthSessionStatsTable */
2026 ret = os_snprintf(buf + len, buflen - len,
2027 /* TODO: dot1xAuthSessionOctetsRx */
2028 /* TODO: dot1xAuthSessionOctetsTx */
2029 /* TODO: dot1xAuthSessionFramesRx */
2030 /* TODO: dot1xAuthSessionFramesTx */
2031 "dot1xAuthSessionId=%08X-%08X\n"
2032 "dot1xAuthSessionAuthenticMethod=%d\n"
2033 "dot1xAuthSessionTime=%u\n"
2034 "dot1xAuthSessionTerminateCause=999\n"
2035 "dot1xAuthSessionUserName=%s\n",
2036 sta->acct_session_id_hi, sta->acct_session_id_lo,
56586197
JM		 2037 (wpa_key_mgmt_wpa_ieee8021x(
2038 wpa_auth_sta_key_mgmt(sta->wpa_sm))) ?
2039 1 : 2,
6fc6879b
JM		 2040 (unsigned int) (time(NULL) -
2041 sta->acct_session_start),
2042 sm->identity);
2043 if (ret < 0 || (size_t) ret >= buflen - len)
2044 return len;
2045 len += ret;
2046
2047 return len;
2048}
2049
2050
2051static void ieee802_1x_finished(struct hostapd_data *hapd,
2052 struct sta_info *sta, int success)
2053{
2054 const u8 *key;
2055 size_t len;
2056 /* TODO: get PMKLifetime from WPA parameters */
2057 static const int dot11RSNAConfigPMKLifetime = 43200;
2058
2059 key = ieee802_1x_get_key(sta->eapol_sm, &len);
2060 if (success && key && len >= PMK_LEN &&
2061 wpa_auth_pmksa_add(sta->wpa_sm, key, dot11RSNAConfigPMKLifetime,
2062 sta->eapol_sm) == 0) {
2063 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
2064 HOSTAPD_LEVEL_DEBUG,
2065 "Added PMKSA cache entry (IEEE 802.1X)");
2066 }
32397063
JM		 2067
2068#ifdef CONFIG_WPS
2069 if (!success && (sta->flags & WLAN_STA_WPS)) {
2070 /*
2071 * Many devices require deauthentication after WPS provisioning
2072 * and some may not be be able to do that themselves, so
2073 * disconnect the client here.
2074 */
2075 wpa_printf(MSG_DEBUG, "WPS: Force disconnection after "
2076 "EAP-Failure");
2077 /* Add a small sleep to increase likelihood of previously
2078 * requested EAP-Failure TX getting out before this should the
2079 * driver reorder operations.
2080 */
2081 os_sleep(0, 10000);
2082 ap_sta_disconnect(hapd, sta, sta->addr,
2083 WLAN_REASON_PREV_AUTH_NOT_VALID);
2084 }
2085#endif /* CONFIG_WPS */
6fc6879b 2086}
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