1 /*
2 * hostapd / IEEE 802.1X-2004 Authenticator
3 * Copyright (c) 2002-2012, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9 #include "utils/includes.h"
10
11 #include "utils/common.h"
12 #include "utils/eloop.h"
13 #include "crypto/md5.h"
14 #include "crypto/crypto.h"
15 #include "crypto/random.h"
16 #include "common/ieee802_11_defs.h"
17 #include "radius/radius.h"
18 #include "radius/radius_client.h"
19 #include "eap_server/eap.h"
20 #include "eap_common/eap_wsc_common.h"
21 #include "eapol_auth/eapol_auth_sm.h"
22 #include "eapol_auth/eapol_auth_sm_i.h"
23 #include "p2p/p2p.h"
24 #include "hostapd.h"
25 #include "accounting.h"
26 #include "sta_info.h"
27 #include "wpa_auth.h"
28 #include "preauth_auth.h"
29 #include "pmksa_cache_auth.h"
30 #include "ap_config.h"
31 #include "ap_drv_ops.h"
32 #include "wps_hostapd.h"
33 #include "hs20.h"
34 #include "ieee802_1x.h"
35
36
37 static void ieee802_1x_finished(struct hostapd_data *hapd,
38 struct sta_info *sta, int success,
39 int remediation);
40
41
ieee802_1x_send(struct hostapd_data * hapd,struct sta_info * sta,u8 type,const u8 * data,size_t datalen)42 static 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 {
72 hostapd_drv_hapd_send_eapol(
73 hapd, sta->addr, buf, len,
74 encrypt, hostapd_sta_flags_to_drv(sta->flags));
75 }
76
77 os_free(buf);
78 }
79
80
ieee802_1x_set_sta_authorized(struct hostapd_data * hapd,struct sta_info * sta,int authorized)81 void ieee802_1x_set_sta_authorized(struct hostapd_data *hapd,
82 struct sta_info *sta, int authorized)
83 {
84 int res;
85
86 if (sta->flags & WLAN_STA_PREAUTH)
87 return;
88
89 if (authorized) {
90 ap_sta_set_authorized(hapd, sta, 1);
91 res = hostapd_set_authorized(hapd, sta, 1);
92 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
93 HOSTAPD_LEVEL_DEBUG, "authorizing port");
94 } else {
95 ap_sta_set_authorized(hapd, sta, 0);
96 res = hostapd_set_authorized(hapd, sta, 0);
97 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
98 HOSTAPD_LEVEL_DEBUG, "unauthorizing port");
99 }
100
101 if (res && errno != ENOENT) {
102 wpa_printf(MSG_DEBUG, "Could not set station " MACSTR
103 " flags for kernel driver (errno=%d).",
104 MAC2STR(sta->addr), errno);
105 }
106
107 if (authorized) {
108 os_get_reltime(&sta->connected_time);
109 accounting_sta_start(hapd, sta);
110 }
111 }
112
113
ieee802_1x_tx_key_one(struct hostapd_data * hapd,struct sta_info * sta,int idx,int broadcast,u8 * key_data,size_t key_len)114 static void ieee802_1x_tx_key_one(struct hostapd_data *hapd,
115 struct sta_info *sta,
116 int idx, int broadcast,
117 u8 *key_data, size_t key_len)
118 {
119 u8 *buf, *ekey;
120 struct ieee802_1x_hdr *hdr;
121 struct ieee802_1x_eapol_key *key;
122 size_t len, ekey_len;
123 struct eapol_state_machine *sm = sta->eapol_sm;
124
125 if (sm == NULL)
126 return;
127
128 len = sizeof(*key) + key_len;
129 buf = os_zalloc(sizeof(*hdr) + len);
130 if (buf == NULL)
131 return;
132
133 hdr = (struct ieee802_1x_hdr *) buf;
134 key = (struct ieee802_1x_eapol_key *) (hdr + 1);
135 key->type = EAPOL_KEY_TYPE_RC4;
136 WPA_PUT_BE16(key->key_length, key_len);
137 wpa_get_ntp_timestamp(key->replay_counter);
138
139 if (random_get_bytes(key->key_iv, sizeof(key->key_iv))) {
140 wpa_printf(MSG_ERROR, "Could not get random numbers");
141 os_free(buf);
142 return;
143 }
144
145 key->key_index = idx | (broadcast ? 0 : BIT(7));
146 if (hapd->conf->eapol_key_index_workaround) {
147 /* According to some information, WinXP Supplicant seems to
148 * interpret bit7 as an indication whether the key is to be
149 * activated, so make it possible to enable workaround that
150 * sets this bit for all keys. */
151 key->key_index |= BIT(7);
152 }
153
154 /* Key is encrypted using "Key-IV + MSK[0..31]" as the RC4-key and
155 * MSK[32..63] is used to sign the message. */
156 if (sm->eap_if->eapKeyData == NULL || sm->eap_if->eapKeyDataLen < 64) {
157 wpa_printf(MSG_ERROR, "No eapKeyData available for encrypting "
158 "and signing EAPOL-Key");
159 os_free(buf);
160 return;
161 }
162 os_memcpy((u8 *) (key + 1), key_data, key_len);
163 ekey_len = sizeof(key->key_iv) + 32;
164 ekey = os_malloc(ekey_len);
165 if (ekey == NULL) {
166 wpa_printf(MSG_ERROR, "Could not encrypt key");
167 os_free(buf);
168 return;
169 }
170 os_memcpy(ekey, key->key_iv, sizeof(key->key_iv));
171 os_memcpy(ekey + sizeof(key->key_iv), sm->eap_if->eapKeyData, 32);
172 rc4_skip(ekey, ekey_len, 0, (u8 *) (key + 1), key_len);
173 os_free(ekey);
174
175 /* This header is needed here for HMAC-MD5, but it will be regenerated
176 * in ieee802_1x_send() */
177 hdr->version = hapd->conf->eapol_version;
178 hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
179 hdr->length = host_to_be16(len);
180 hmac_md5(sm->eap_if->eapKeyData + 32, 32, buf, sizeof(*hdr) + len,
181 key->key_signature);
182
183 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key to " MACSTR
184 " (%s index=%d)", MAC2STR(sm->addr),
185 broadcast ? "broadcast" : "unicast", idx);
186 ieee802_1x_send(hapd, sta, IEEE802_1X_TYPE_EAPOL_KEY, (u8 *) key, len);
187 if (sta->eapol_sm)
188 sta->eapol_sm->dot1xAuthEapolFramesTx++;
189 os_free(buf);
190 }
191
192
ieee802_1x_tx_key(struct hostapd_data * hapd,struct sta_info * sta)193 void ieee802_1x_tx_key(struct hostapd_data *hapd, struct sta_info *sta)
194 {
195 struct eapol_authenticator *eapol = hapd->eapol_auth;
196 struct eapol_state_machine *sm = sta->eapol_sm;
197
198 if (sm == NULL || !sm->eap_if->eapKeyData)
199 return;
200
201 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key(s) to " MACSTR,
202 MAC2STR(sta->addr));
203
204 #ifndef CONFIG_NO_VLAN
205 if (sta->vlan_id > 0 && sta->vlan_id <= MAX_VLAN_ID) {
206 wpa_printf(MSG_ERROR, "Using WEP with vlans is not supported.");
207 return;
208 }
209 #endif /* CONFIG_NO_VLAN */
210
211 if (eapol->default_wep_key) {
212 ieee802_1x_tx_key_one(hapd, sta, eapol->default_wep_key_idx, 1,
213 eapol->default_wep_key,
214 hapd->conf->default_wep_key_len);
215 }
216
217 if (hapd->conf->individual_wep_key_len > 0) {
218 u8 *ikey;
219 ikey = os_malloc(hapd->conf->individual_wep_key_len);
220 if (ikey == NULL ||
221 random_get_bytes(ikey, hapd->conf->individual_wep_key_len))
222 {
223 wpa_printf(MSG_ERROR, "Could not generate random "
224 "individual WEP key.");
225 os_free(ikey);
226 return;
227 }
228
229 wpa_hexdump_key(MSG_DEBUG, "Individual WEP key",
230 ikey, hapd->conf->individual_wep_key_len);
231
232 ieee802_1x_tx_key_one(hapd, sta, 0, 0, ikey,
233 hapd->conf->individual_wep_key_len);
234
235 /* TODO: set encryption in TX callback, i.e., only after STA
236 * has ACKed EAPOL-Key frame */
237 if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
238 sta->addr, 0, 1, NULL, 0, ikey,
239 hapd->conf->individual_wep_key_len)) {
240 wpa_printf(MSG_ERROR, "Could not set individual WEP "
241 "encryption.");
242 }
243
244 os_free(ikey);
245 }
246 }
247
248
radius_mode_txt(struct hostapd_data * hapd)249 const char *radius_mode_txt(struct hostapd_data *hapd)
250 {
251 switch (hapd->iface->conf->hw_mode) {
252 case HOSTAPD_MODE_IEEE80211AD:
253 return "802.11ad";
254 case HOSTAPD_MODE_IEEE80211A:
255 return "802.11a";
256 case HOSTAPD_MODE_IEEE80211G:
257 return "802.11g";
258 case HOSTAPD_MODE_IEEE80211B:
259 default:
260 return "802.11b";
261 }
262 }
263
264
radius_sta_rate(struct hostapd_data * hapd,struct sta_info * sta)265 int radius_sta_rate(struct hostapd_data *hapd, struct sta_info *sta)
266 {
267 int i;
268 u8 rate = 0;
269
270 for (i = 0; i < sta->supported_rates_len; i++)
271 if ((sta->supported_rates[i] & 0x7f) > rate)
272 rate = sta->supported_rates[i] & 0x7f;
273
274 return rate;
275 }
276
277
278 #ifndef CONFIG_NO_RADIUS
ieee802_1x_learn_identity(struct hostapd_data * hapd,struct eapol_state_machine * sm,const u8 * eap,size_t len)279 static void ieee802_1x_learn_identity(struct hostapd_data *hapd,
280 struct eapol_state_machine *sm,
281 const u8 *eap, size_t len)
282 {
283 const u8 *identity;
284 size_t identity_len;
285
286 if (len <= sizeof(struct eap_hdr) ||
287 eap[sizeof(struct eap_hdr)] != EAP_TYPE_IDENTITY)
288 return;
289
290 identity = eap_get_identity(sm->eap, &identity_len);
291 if (identity == NULL)
292 return;
293
294 /* Save station identity for future RADIUS packets */
295 os_free(sm->identity);
296 sm->identity = (u8 *) dup_binstr(identity, identity_len);
297 if (sm->identity == NULL) {
298 sm->identity_len = 0;
299 return;
300 }
301
302 sm->identity_len = identity_len;
303 hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
304 HOSTAPD_LEVEL_DEBUG, "STA identity '%s'", sm->identity);
305 sm->dot1xAuthEapolRespIdFramesRx++;
306 }
307
308
add_common_radius_sta_attr_rsn(struct hostapd_data * hapd,struct hostapd_radius_attr * req_attr,struct sta_info * sta,struct radius_msg * msg)309 static int add_common_radius_sta_attr_rsn(struct hostapd_data *hapd,
310 struct hostapd_radius_attr *req_attr,
311 struct sta_info *sta,
312 struct radius_msg *msg)
313 {
314 u32 suite;
315 int ver, val;
316
317 ver = wpa_auth_sta_wpa_version(sta->wpa_sm);
318 val = wpa_auth_get_pairwise(sta->wpa_sm);
319 suite = wpa_cipher_to_suite(ver, val);
320 if (val != -1 &&
321 !hostapd_config_get_radius_attr(req_attr,
322 RADIUS_ATTR_WLAN_PAIRWISE_CIPHER) &&
323 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_WLAN_PAIRWISE_CIPHER,
324 suite)) {
325 wpa_printf(MSG_ERROR, "Could not add WLAN-Pairwise-Cipher");
326 return -1;
327 }
328
329 suite = wpa_cipher_to_suite((hapd->conf->wpa & 0x2) ?
330 WPA_PROTO_RSN : WPA_PROTO_WPA,
331 hapd->conf->wpa_group);
332 if (!hostapd_config_get_radius_attr(req_attr,
333 RADIUS_ATTR_WLAN_GROUP_CIPHER) &&
334 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_WLAN_GROUP_CIPHER,
335 suite)) {
336 wpa_printf(MSG_ERROR, "Could not add WLAN-Group-Cipher");
337 return -1;
338 }
339
340 val = wpa_auth_sta_key_mgmt(sta->wpa_sm);
341 suite = wpa_akm_to_suite(val);
342 if (val != -1 &&
343 !hostapd_config_get_radius_attr(req_attr,
344 RADIUS_ATTR_WLAN_AKM_SUITE) &&
345 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_WLAN_AKM_SUITE,
346 suite)) {
347 wpa_printf(MSG_ERROR, "Could not add WLAN-AKM-Suite");
348 return -1;
349 }
350
351 #ifdef CONFIG_IEEE80211W
352 if (hapd->conf->ieee80211w != NO_MGMT_FRAME_PROTECTION) {
353 suite = wpa_cipher_to_suite(WPA_PROTO_RSN,
354 hapd->conf->group_mgmt_cipher);
355 if (!hostapd_config_get_radius_attr(
356 req_attr, RADIUS_ATTR_WLAN_GROUP_MGMT_CIPHER) &&
357 !radius_msg_add_attr_int32(
358 msg, RADIUS_ATTR_WLAN_GROUP_MGMT_CIPHER, suite)) {
359 wpa_printf(MSG_ERROR,
360 "Could not add WLAN-Group-Mgmt-Cipher");
361 return -1;
362 }
363 }
364 #endif /* CONFIG_IEEE80211W */
365
366 return 0;
367 }
368
369
add_common_radius_sta_attr(struct hostapd_data * hapd,struct hostapd_radius_attr * req_attr,struct sta_info * sta,struct radius_msg * msg)370 static int add_common_radius_sta_attr(struct hostapd_data *hapd,
371 struct hostapd_radius_attr *req_attr,
372 struct sta_info *sta,
373 struct radius_msg *msg)
374 {
375 char buf[128];
376
377 if (!hostapd_config_get_radius_attr(req_attr,
378 RADIUS_ATTR_NAS_PORT) &&
379 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT, sta->aid)) {
380 wpa_printf(MSG_ERROR, "Could not add NAS-Port");
381 return -1;
382 }
383
384 os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
385 MAC2STR(sta->addr));
386 buf[sizeof(buf) - 1] = '\0';
387 if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID,
388 (u8 *) buf, os_strlen(buf))) {
389 wpa_printf(MSG_ERROR, "Could not add Calling-Station-Id");
390 return -1;
391 }
392
393 if (sta->flags & WLAN_STA_PREAUTH) {
394 os_strlcpy(buf, "IEEE 802.11i Pre-Authentication",
395 sizeof(buf));
396 } else {
397 os_snprintf(buf, sizeof(buf), "CONNECT %d%sMbps %s",
398 radius_sta_rate(hapd, sta) / 2,
399 (radius_sta_rate(hapd, sta) & 1) ? ".5" : "",
400 radius_mode_txt(hapd));
401 buf[sizeof(buf) - 1] = '\0';
402 }
403 if (!hostapd_config_get_radius_attr(req_attr,
404 RADIUS_ATTR_CONNECT_INFO) &&
405 !radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO,
406 (u8 *) buf, os_strlen(buf))) {
407 wpa_printf(MSG_ERROR, "Could not add Connect-Info");
408 return -1;
409 }
410
411 if (sta->acct_session_id_hi || sta->acct_session_id_lo) {
412 os_snprintf(buf, sizeof(buf), "%08X-%08X",
413 sta->acct_session_id_hi, sta->acct_session_id_lo);
414 if (!radius_msg_add_attr(msg, RADIUS_ATTR_ACCT_SESSION_ID,
415 (u8 *) buf, os_strlen(buf))) {
416 wpa_printf(MSG_ERROR, "Could not add Acct-Session-Id");
417 return -1;
418 }
419 }
420
421 #ifdef CONFIG_IEEE80211R
422 if (hapd->conf->wpa && wpa_key_mgmt_ft(hapd->conf->wpa_key_mgmt) &&
423 sta->wpa_sm &&
424 (wpa_key_mgmt_ft(wpa_auth_sta_key_mgmt(sta->wpa_sm)) ||
425 sta->auth_alg == WLAN_AUTH_FT) &&
426 !hostapd_config_get_radius_attr(req_attr,
427 RADIUS_ATTR_MOBILITY_DOMAIN_ID) &&
428 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_MOBILITY_DOMAIN_ID,
429 WPA_GET_BE16(
430 hapd->conf->mobility_domain))) {
431 wpa_printf(MSG_ERROR, "Could not add Mobility-Domain-Id");
432 return -1;
433 }
434 #endif /* CONFIG_IEEE80211R */
435
436 if (hapd->conf->wpa && sta->wpa_sm &&
437 add_common_radius_sta_attr_rsn(hapd, req_attr, sta, msg) < 0)
438 return -1;
439
440 return 0;
441 }
442
443
add_common_radius_attr(struct hostapd_data * hapd,struct hostapd_radius_attr * req_attr,struct sta_info * sta,struct radius_msg * msg)444 int add_common_radius_attr(struct hostapd_data *hapd,
445 struct hostapd_radius_attr *req_attr,
446 struct sta_info *sta,
447 struct radius_msg *msg)
448 {
449 char buf[128];
450 struct hostapd_radius_attr *attr;
451
452 if (!hostapd_config_get_radius_attr(req_attr,
453 RADIUS_ATTR_NAS_IP_ADDRESS) &&
454 hapd->conf->own_ip_addr.af == AF_INET &&
455 !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS,
456 (u8 *) &hapd->conf->own_ip_addr.u.v4, 4)) {
457 wpa_printf(MSG_ERROR, "Could not add NAS-IP-Address");
458 return -1;
459 }
460
461 #ifdef CONFIG_IPV6
462 if (!hostapd_config_get_radius_attr(req_attr,
463 RADIUS_ATTR_NAS_IPV6_ADDRESS) &&
464 hapd->conf->own_ip_addr.af == AF_INET6 &&
465 !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IPV6_ADDRESS,
466 (u8 *) &hapd->conf->own_ip_addr.u.v6, 16)) {
467 wpa_printf(MSG_ERROR, "Could not add NAS-IPv6-Address");
468 return -1;
469 }
470 #endif /* CONFIG_IPV6 */
471
472 if (!hostapd_config_get_radius_attr(req_attr,
473 RADIUS_ATTR_NAS_IDENTIFIER) &&
474 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 wpa_printf(MSG_ERROR, "Could not add NAS-Identifier");
479 return -1;
480 }
481
482 os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT ":%s",
483 MAC2STR(hapd->own_addr),
484 wpa_ssid_txt(hapd->conf->ssid.ssid,
485 hapd->conf->ssid.ssid_len));
486 buf[sizeof(buf) - 1] = '\0';
487 if (!hostapd_config_get_radius_attr(req_attr,
488 RADIUS_ATTR_CALLED_STATION_ID) &&
489 !radius_msg_add_attr(msg, RADIUS_ATTR_CALLED_STATION_ID,
490 (u8 *) buf, os_strlen(buf))) {
491 wpa_printf(MSG_ERROR, "Could not add Called-Station-Id");
492 return -1;
493 }
494
495 if (!hostapd_config_get_radius_attr(req_attr,
496 RADIUS_ATTR_NAS_PORT_TYPE) &&
497 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT_TYPE,
498 RADIUS_NAS_PORT_TYPE_IEEE_802_11)) {
499 wpa_printf(MSG_ERROR, "Could not add NAS-Port-Type");
500 return -1;
501 }
502
503 #ifdef CONFIG_INTERWORKING
504 if (hapd->conf->interworking &&
505 !is_zero_ether_addr(hapd->conf->hessid)) {
506 os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
507 MAC2STR(hapd->conf->hessid));
508 buf[sizeof(buf) - 1] = '\0';
509 if (!hostapd_config_get_radius_attr(req_attr,
510 RADIUS_ATTR_WLAN_HESSID) &&
511 !radius_msg_add_attr(msg, RADIUS_ATTR_WLAN_HESSID,
512 (u8 *) buf, os_strlen(buf))) {
513 wpa_printf(MSG_ERROR, "Could not add WLAN-HESSID");
514 return -1;
515 }
516 }
517 #endif /* CONFIG_INTERWORKING */
518
519 if (sta && add_common_radius_sta_attr(hapd, req_attr, sta, msg) < 0)
520 return -1;
521
522 for (attr = req_attr; attr; attr = attr->next) {
523 if (!radius_msg_add_attr(msg, attr->type,
524 wpabuf_head(attr->val),
525 wpabuf_len(attr->val))) {
526 wpa_printf(MSG_ERROR, "Could not add RADIUS "
527 "attribute");
528 return -1;
529 }
530 }
531
532 return 0;
533 }
534
535
ieee802_1x_encapsulate_radius(struct hostapd_data * hapd,struct sta_info * sta,const u8 * eap,size_t len)536 static void ieee802_1x_encapsulate_radius(struct hostapd_data *hapd,
537 struct sta_info *sta,
538 const u8 *eap, size_t len)
539 {
540 struct radius_msg *msg;
541 struct eapol_state_machine *sm = sta->eapol_sm;
542
543 if (sm == NULL)
544 return;
545
546 ieee802_1x_learn_identity(hapd, sm, eap, len);
547
548 wpa_printf(MSG_DEBUG, "Encapsulating EAP message into a RADIUS "
549 "packet");
550
551 sm->radius_identifier = radius_client_get_id(hapd->radius);
552 msg = radius_msg_new(RADIUS_CODE_ACCESS_REQUEST,
553 sm->radius_identifier);
554 if (msg == NULL) {
555 wpa_printf(MSG_INFO, "Could not create new RADIUS packet");
556 return;
557 }
558
559 radius_msg_make_authenticator(msg, (u8 *) sta, sizeof(*sta));
560
561 if (sm->identity &&
562 !radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME,
563 sm->identity, sm->identity_len)) {
564 wpa_printf(MSG_INFO, "Could not add User-Name");
565 goto fail;
566 }
567
568 if (add_common_radius_attr(hapd, hapd->conf->radius_auth_req_attr, sta,
569 msg) < 0)
570 goto fail;
571
572 /* TODO: should probably check MTU from driver config; 2304 is max for
573 * IEEE 802.11, but use 1400 to avoid problems with too large packets
574 */
575 if (!hostapd_config_get_radius_attr(hapd->conf->radius_auth_req_attr,
576 RADIUS_ATTR_FRAMED_MTU) &&
577 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_FRAMED_MTU, 1400)) {
578 wpa_printf(MSG_INFO, "Could not add Framed-MTU");
579 goto fail;
580 }
581
582 if (eap && !radius_msg_add_eap(msg, eap, len)) {
583 wpa_printf(MSG_INFO, "Could not add EAP-Message");
584 goto fail;
585 }
586
587 /* State attribute must be copied if and only if this packet is
588 * Access-Request reply to the previous Access-Challenge */
589 if (sm->last_recv_radius &&
590 radius_msg_get_hdr(sm->last_recv_radius)->code ==
591 RADIUS_CODE_ACCESS_CHALLENGE) {
592 int res = radius_msg_copy_attr(msg, sm->last_recv_radius,
593 RADIUS_ATTR_STATE);
594 if (res < 0) {
595 wpa_printf(MSG_INFO, "Could not copy State attribute from previous Access-Challenge");
596 goto fail;
597 }
598 if (res > 0) {
599 wpa_printf(MSG_DEBUG, "Copied RADIUS State Attribute");
600 }
601 }
602
603 if (hapd->conf->radius_request_cui) {
604 const u8 *cui;
605 size_t cui_len;
606 /* Add previously learned CUI or nul CUI to request CUI */
607 if (sm->radius_cui) {
608 cui = wpabuf_head(sm->radius_cui);
609 cui_len = wpabuf_len(sm->radius_cui);
610 } else {
611 cui = (const u8 *) "\0";
612 cui_len = 1;
613 }
614 if (!radius_msg_add_attr(msg,
615 RADIUS_ATTR_CHARGEABLE_USER_IDENTITY,
616 cui, cui_len)) {
617 wpa_printf(MSG_ERROR, "Could not add CUI");
618 goto fail;
619 }
620 }
621
622 #ifdef CONFIG_HS20
623 if (hapd->conf->hs20) {
624 u8 ver = 1; /* Release 2 */
625 if (!radius_msg_add_wfa(
626 msg, RADIUS_VENDOR_ATTR_WFA_HS20_AP_VERSION,
627 &ver, 1)) {
628 wpa_printf(MSG_ERROR, "Could not add HS 2.0 AP "
629 "version");
630 goto fail;
631 }
632
633 if (sta->hs20_ie && wpabuf_len(sta->hs20_ie) > 0) {
634 const u8 *pos;
635 u8 buf[3];
636 u16 id;
637 pos = wpabuf_head_u8(sta->hs20_ie);
638 buf[0] = (*pos) >> 4;
639 if (((*pos) & HS20_PPS_MO_ID_PRESENT) &&
640 wpabuf_len(sta->hs20_ie) >= 3)
641 id = WPA_GET_LE16(pos + 1);
642 else
643 id = 0;
644 WPA_PUT_BE16(buf + 1, id);
645 if (!radius_msg_add_wfa(
646 msg,
647 RADIUS_VENDOR_ATTR_WFA_HS20_STA_VERSION,
648 buf, sizeof(buf))) {
649 wpa_printf(MSG_ERROR, "Could not add HS 2.0 "
650 "STA version");
651 goto fail;
652 }
653 }
654 }
655 #endif /* CONFIG_HS20 */
656
657 if (radius_client_send(hapd->radius, msg, RADIUS_AUTH, sta->addr) < 0)
658 goto fail;
659
660 return;
661
662 fail:
663 radius_msg_free(msg);
664 }
665 #endif /* CONFIG_NO_RADIUS */
666
667
handle_eap_response(struct hostapd_data * hapd,struct sta_info * sta,struct eap_hdr * eap,size_t len)668 static void handle_eap_response(struct hostapd_data *hapd,
669 struct sta_info *sta, struct eap_hdr *eap,
670 size_t len)
671 {
672 u8 type, *data;
673 struct eapol_state_machine *sm = sta->eapol_sm;
674 if (sm == NULL)
675 return;
676
677 data = (u8 *) (eap + 1);
678
679 if (len < sizeof(*eap) + 1) {
680 wpa_printf(MSG_INFO, "handle_eap_response: too short response data");
681 return;
682 }
683
684 sm->eap_type_supp = type = data[0];
685
686 hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
687 HOSTAPD_LEVEL_DEBUG, "received EAP packet (code=%d "
688 "id=%d len=%d) from STA: EAP Response-%s (%d)",
689 eap->code, eap->identifier, be_to_host16(eap->length),
690 eap_server_get_name(0, type), type);
691
692 sm->dot1xAuthEapolRespFramesRx++;
693
694 wpabuf_free(sm->eap_if->eapRespData);
695 sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len);
696 sm->eapolEap = TRUE;
697 }
698
699
700 /* Process incoming EAP packet from Supplicant */
handle_eap(struct hostapd_data * hapd,struct sta_info * sta,u8 * buf,size_t len)701 static void handle_eap(struct hostapd_data *hapd, struct sta_info *sta,
702 u8 *buf, size_t len)
703 {
704 struct eap_hdr *eap;
705 u16 eap_len;
706
707 if (len < sizeof(*eap)) {
708 wpa_printf(MSG_INFO, " too short EAP packet");
709 return;
710 }
711
712 eap = (struct eap_hdr *) buf;
713
714 eap_len = be_to_host16(eap->length);
715 wpa_printf(MSG_DEBUG, "EAP: code=%d identifier=%d length=%d",
716 eap->code, eap->identifier, eap_len);
717 if (eap_len < sizeof(*eap)) {
718 wpa_printf(MSG_DEBUG, " Invalid EAP length");
719 return;
720 } else if (eap_len > len) {
721 wpa_printf(MSG_DEBUG, " Too short frame to contain this EAP "
722 "packet");
723 return;
724 } else if (eap_len < len) {
725 wpa_printf(MSG_DEBUG, " Ignoring %lu extra bytes after EAP "
726 "packet", (unsigned long) len - eap_len);
727 }
728
729 switch (eap->code) {
730 case EAP_CODE_REQUEST:
731 wpa_printf(MSG_DEBUG, " (request)");
732 return;
733 case EAP_CODE_RESPONSE:
734 wpa_printf(MSG_DEBUG, " (response)");
735 handle_eap_response(hapd, sta, eap, eap_len);
736 break;
737 case EAP_CODE_SUCCESS:
738 wpa_printf(MSG_DEBUG, " (success)");
739 return;
740 case EAP_CODE_FAILURE:
741 wpa_printf(MSG_DEBUG, " (failure)");
742 return;
743 default:
744 wpa_printf(MSG_DEBUG, " (unknown code)");
745 return;
746 }
747 }
748
749
750 static struct eapol_state_machine *
ieee802_1x_alloc_eapol_sm(struct hostapd_data * hapd,struct sta_info * sta)751 ieee802_1x_alloc_eapol_sm(struct hostapd_data *hapd, struct sta_info *sta)
752 {
753 int flags = 0;
754 if (sta->flags & WLAN_STA_PREAUTH)
755 flags |= EAPOL_SM_PREAUTH;
756 if (sta->wpa_sm) {
757 flags |= EAPOL_SM_USES_WPA;
758 if (wpa_auth_sta_get_pmksa(sta->wpa_sm))
759 flags |= EAPOL_SM_FROM_PMKSA_CACHE;
760 }
761 return eapol_auth_alloc(hapd->eapol_auth, sta->addr, flags,
762 sta->wps_ie, sta->p2p_ie, sta,
763 sta->identity, sta->radius_cui);
764 }
765
766
767 /**
768 * ieee802_1x_receive - Process the EAPOL frames from the Supplicant
769 * @hapd: hostapd BSS data
770 * @sa: Source address (sender of the EAPOL frame)
771 * @buf: EAPOL frame
772 * @len: Length of buf in octets
773 *
774 * This function is called for each incoming EAPOL frame from the interface
775 */
ieee802_1x_receive(struct hostapd_data * hapd,const u8 * sa,const u8 * buf,size_t len)776 void ieee802_1x_receive(struct hostapd_data *hapd, const u8 *sa, const u8 *buf,
777 size_t len)
778 {
779 struct sta_info *sta;
780 struct ieee802_1x_hdr *hdr;
781 struct ieee802_1x_eapol_key *key;
782 u16 datalen;
783 struct rsn_pmksa_cache_entry *pmksa;
784 int key_mgmt;
785
786 if (!hapd->conf->ieee802_1x && !hapd->conf->wpa && !hapd->conf->osen &&
787 !hapd->conf->wps_state)
788 return;
789
790 wpa_printf(MSG_DEBUG, "IEEE 802.1X: %lu bytes from " MACSTR,
791 (unsigned long) len, MAC2STR(sa));
792 sta = ap_get_sta(hapd, sa);
793 if (!sta || (!(sta->flags & (WLAN_STA_ASSOC | WLAN_STA_PREAUTH)) &&
794 !(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_WIRED))) {
795 wpa_printf(MSG_DEBUG, "IEEE 802.1X data frame from not "
796 "associated/Pre-authenticating STA");
797 return;
798 }
799
800 if (len < sizeof(*hdr)) {
801 wpa_printf(MSG_INFO, " too short IEEE 802.1X packet");
802 return;
803 }
804
805 hdr = (struct ieee802_1x_hdr *) buf;
806 datalen = be_to_host16(hdr->length);
807 wpa_printf(MSG_DEBUG, " IEEE 802.1X: version=%d type=%d length=%d",
808 hdr->version, hdr->type, datalen);
809
810 if (len - sizeof(*hdr) < datalen) {
811 wpa_printf(MSG_INFO, " frame too short for this IEEE 802.1X packet");
812 if (sta->eapol_sm)
813 sta->eapol_sm->dot1xAuthEapLengthErrorFramesRx++;
814 return;
815 }
816 if (len - sizeof(*hdr) > datalen) {
817 wpa_printf(MSG_DEBUG, " ignoring %lu extra octets after "
818 "IEEE 802.1X packet",
819 (unsigned long) len - sizeof(*hdr) - datalen);
820 }
821
822 if (sta->eapol_sm) {
823 sta->eapol_sm->dot1xAuthLastEapolFrameVersion = hdr->version;
824 sta->eapol_sm->dot1xAuthEapolFramesRx++;
825 }
826
827 key = (struct ieee802_1x_eapol_key *) (hdr + 1);
828 if (datalen >= sizeof(struct ieee802_1x_eapol_key) &&
829 hdr->type == IEEE802_1X_TYPE_EAPOL_KEY &&
830 (key->type == EAPOL_KEY_TYPE_WPA ||
831 key->type == EAPOL_KEY_TYPE_RSN)) {
832 wpa_receive(hapd->wpa_auth, sta->wpa_sm, (u8 *) hdr,
833 sizeof(*hdr) + datalen);
834 return;
835 }
836
837 if (!hapd->conf->ieee802_1x && !hapd->conf->osen &&
838 !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) {
839 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore EAPOL message - "
840 "802.1X not enabled and WPS not used");
841 return;
842 }
843
844 key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm);
845 if (key_mgmt != -1 && wpa_key_mgmt_wpa_psk(key_mgmt)) {
846 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore EAPOL message - "
847 "STA is using PSK");
848 return;
849 }
850
851 if (!sta->eapol_sm) {
852 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
853 if (!sta->eapol_sm)
854 return;
855
856 #ifdef CONFIG_WPS
857 if (!hapd->conf->ieee802_1x && hapd->conf->wps_state) {
858 u32 wflags = sta->flags & (WLAN_STA_WPS |
859 WLAN_STA_WPS2 |
860 WLAN_STA_MAYBE_WPS);
861 if (wflags == WLAN_STA_MAYBE_WPS ||
862 wflags == (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) {
863 /*
864 * Delay EAPOL frame transmission until a
865 * possible WPS STA initiates the handshake
866 * with EAPOL-Start. Only allow the wait to be
867 * skipped if the STA is known to support WPS
868 * 2.0.
869 */
870 wpa_printf(MSG_DEBUG, "WPS: Do not start "
871 "EAPOL until EAPOL-Start is "
872 "received");
873 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
874 }
875 }
876 #endif /* CONFIG_WPS */
877
878 sta->eapol_sm->eap_if->portEnabled = TRUE;
879 }
880
881 /* since we support version 1, we can ignore version field and proceed
882 * as specified in version 1 standard [IEEE Std 802.1X-2001, 7.5.5] */
883 /* TODO: actually, we are not version 1 anymore.. However, Version 2
884 * does not change frame contents, so should be ok to process frames
885 * more or less identically. Some changes might be needed for
886 * verification of fields. */
887
888 switch (hdr->type) {
889 case IEEE802_1X_TYPE_EAP_PACKET:
890 handle_eap(hapd, sta, (u8 *) (hdr + 1), datalen);
891 break;
892
893 case IEEE802_1X_TYPE_EAPOL_START:
894 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
895 HOSTAPD_LEVEL_DEBUG, "received EAPOL-Start "
896 "from STA");
897 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
898 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
899 if (pmksa) {
900 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
901 HOSTAPD_LEVEL_DEBUG, "cached PMKSA "
902 "available - ignore it since "
903 "STA sent EAPOL-Start");
904 wpa_auth_sta_clear_pmksa(sta->wpa_sm, pmksa);
905 }
906 sta->eapol_sm->eapolStart = TRUE;
907 sta->eapol_sm->dot1xAuthEapolStartFramesRx++;
908 eap_server_clear_identity(sta->eapol_sm->eap);
909 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
910 break;
911
912 case IEEE802_1X_TYPE_EAPOL_LOGOFF:
913 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
914 HOSTAPD_LEVEL_DEBUG, "received EAPOL-Logoff "
915 "from STA");
916 sta->acct_terminate_cause =
917 RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
918 accounting_sta_stop(hapd, sta);
919 sta->eapol_sm->eapolLogoff = TRUE;
920 sta->eapol_sm->dot1xAuthEapolLogoffFramesRx++;
921 eap_server_clear_identity(sta->eapol_sm->eap);
922 break;
923
924 case IEEE802_1X_TYPE_EAPOL_KEY:
925 wpa_printf(MSG_DEBUG, " EAPOL-Key");
926 if (!ap_sta_is_authorized(sta)) {
927 wpa_printf(MSG_DEBUG, " Dropped key data from "
928 "unauthorized Supplicant");
929 break;
930 }
931 break;
932
933 case IEEE802_1X_TYPE_EAPOL_ENCAPSULATED_ASF_ALERT:
934 wpa_printf(MSG_DEBUG, " EAPOL-Encapsulated-ASF-Alert");
935 /* TODO: implement support for this; show data */
936 break;
937
938 default:
939 wpa_printf(MSG_DEBUG, " unknown IEEE 802.1X packet type");
940 sta->eapol_sm->dot1xAuthInvalidEapolFramesRx++;
941 break;
942 }
943
944 eapol_auth_step(sta->eapol_sm);
945 }
946
947
948 /**
949 * ieee802_1x_new_station - Start IEEE 802.1X authentication
950 * @hapd: hostapd BSS data
951 * @sta: The station
952 *
953 * This function is called to start IEEE 802.1X authentication when a new
954 * station completes IEEE 802.11 association.
955 */
ieee802_1x_new_station(struct hostapd_data * hapd,struct sta_info * sta)956 void ieee802_1x_new_station(struct hostapd_data *hapd, struct sta_info *sta)
957 {
958 struct rsn_pmksa_cache_entry *pmksa;
959 int reassoc = 1;
960 int force_1x = 0;
961 int key_mgmt;
962
963 #ifdef CONFIG_WPS
964 if (hapd->conf->wps_state && hapd->conf->wpa &&
965 (sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) {
966 /*
967 * Need to enable IEEE 802.1X/EAPOL state machines for possible
968 * WPS handshake even if IEEE 802.1X/EAPOL is not used for
969 * authentication in this BSS.
970 */
971 force_1x = 1;
972 }
973 #endif /* CONFIG_WPS */
974
975 if (!force_1x && !hapd->conf->ieee802_1x && !hapd->conf->osen) {
976 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - "
977 "802.1X not enabled or forced for WPS");
978 /*
979 * Clear any possible EAPOL authenticator state to support
980 * reassociation change from WPS to PSK.
981 */
982 ieee802_1x_free_station(sta);
983 return;
984 }
985
986 key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm);
987 if (key_mgmt != -1 && wpa_key_mgmt_wpa_psk(key_mgmt)) {
988 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - using PSK");
989 /*
990 * Clear any possible EAPOL authenticator state to support
991 * reassociation change from WPA-EAP to PSK.
992 */
993 ieee802_1x_free_station(sta);
994 return;
995 }
996
997 if (sta->eapol_sm == NULL) {
998 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
999 HOSTAPD_LEVEL_DEBUG, "start authentication");
1000 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
1001 if (sta->eapol_sm == NULL) {
1002 hostapd_logger(hapd, sta->addr,
1003 HOSTAPD_MODULE_IEEE8021X,
1004 HOSTAPD_LEVEL_INFO,
1005 "failed to allocate state machine");
1006 return;
1007 }
1008 reassoc = 0;
1009 }
1010
1011 #ifdef CONFIG_WPS
1012 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
1013 if (!hapd->conf->ieee802_1x && hapd->conf->wps_state &&
1014 !(sta->flags & WLAN_STA_WPS2)) {
1015 /*
1016 * Delay EAPOL frame transmission until a possible WPS STA
1017 * initiates the handshake with EAPOL-Start. Only allow the
1018 * wait to be skipped if the STA is known to support WPS 2.0.
1019 */
1020 wpa_printf(MSG_DEBUG, "WPS: Do not start EAPOL until "
1021 "EAPOL-Start is received");
1022 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
1023 }
1024 #endif /* CONFIG_WPS */
1025
1026 sta->eapol_sm->eap_if->portEnabled = TRUE;
1027
1028 #ifdef CONFIG_IEEE80211R
1029 if (sta->auth_alg == WLAN_AUTH_FT) {
1030 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1031 HOSTAPD_LEVEL_DEBUG,
1032 "PMK from FT - skip IEEE 802.1X/EAP");
1033 /* Setup EAPOL state machines to already authenticated state
1034 * because of existing FT information from R0KH. */
1035 sta->eapol_sm->keyRun = TRUE;
1036 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
1037 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
1038 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
1039 sta->eapol_sm->authSuccess = TRUE;
1040 sta->eapol_sm->authFail = FALSE;
1041 if (sta->eapol_sm->eap)
1042 eap_sm_notify_cached(sta->eapol_sm->eap);
1043 /* TODO: get vlan_id from R0KH using RRB message */
1044 return;
1045 }
1046 #endif /* CONFIG_IEEE80211R */
1047
1048 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
1049 if (pmksa) {
1050 int old_vlanid;
1051
1052 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1053 HOSTAPD_LEVEL_DEBUG,
1054 "PMK from PMKSA cache - skip IEEE 802.1X/EAP");
1055 /* Setup EAPOL state machines to already authenticated state
1056 * because of existing PMKSA information in the cache. */
1057 sta->eapol_sm->keyRun = TRUE;
1058 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
1059 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
1060 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
1061 sta->eapol_sm->authSuccess = TRUE;
1062 sta->eapol_sm->authFail = FALSE;
1063 if (sta->eapol_sm->eap)
1064 eap_sm_notify_cached(sta->eapol_sm->eap);
1065 old_vlanid = sta->vlan_id;
1066 pmksa_cache_to_eapol_data(pmksa, sta->eapol_sm);
1067 if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
1068 sta->vlan_id = 0;
1069 ap_sta_bind_vlan(hapd, sta, old_vlanid);
1070 } else {
1071 if (reassoc) {
1072 /*
1073 * Force EAPOL state machines to start
1074 * re-authentication without having to wait for the
1075 * Supplicant to send EAPOL-Start.
1076 */
1077 sta->eapol_sm->reAuthenticate = TRUE;
1078 }
1079 eapol_auth_step(sta->eapol_sm);
1080 }
1081 }
1082
1083
ieee802_1x_free_station(struct sta_info * sta)1084 void ieee802_1x_free_station(struct sta_info *sta)
1085 {
1086 struct eapol_state_machine *sm = sta->eapol_sm;
1087
1088 if (sm == NULL)
1089 return;
1090
1091 sta->eapol_sm = NULL;
1092
1093 #ifndef CONFIG_NO_RADIUS
1094 radius_msg_free(sm->last_recv_radius);
1095 radius_free_class(&sm->radius_class);
1096 wpabuf_free(sm->radius_cui);
1097 #endif /* CONFIG_NO_RADIUS */
1098
1099 os_free(sm->identity);
1100 eapol_auth_free(sm);
1101 }
1102
1103
1104 #ifndef CONFIG_NO_RADIUS
ieee802_1x_decapsulate_radius(struct hostapd_data * hapd,struct sta_info * sta)1105 static void ieee802_1x_decapsulate_radius(struct hostapd_data *hapd,
1106 struct sta_info *sta)
1107 {
1108 struct wpabuf *eap;
1109 const struct eap_hdr *hdr;
1110 int eap_type = -1;
1111 char buf[64];
1112 struct radius_msg *msg;
1113 struct eapol_state_machine *sm = sta->eapol_sm;
1114
1115 if (sm == NULL || sm->last_recv_radius == NULL) {
1116 if (sm)
1117 sm->eap_if->aaaEapNoReq = TRUE;
1118 return;
1119 }
1120
1121 msg = sm->last_recv_radius;
1122
1123 eap = radius_msg_get_eap(msg);
1124 if (eap == NULL) {
1125 /* RFC 3579, Chap. 2.6.3:
1126 * RADIUS server SHOULD NOT send Access-Reject/no EAP-Message
1127 * attribute */
1128 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1129 HOSTAPD_LEVEL_WARNING, "could not extract "
1130 "EAP-Message from RADIUS message");
1131 sm->eap_if->aaaEapNoReq = TRUE;
1132 return;
1133 }
1134
1135 if (wpabuf_len(eap) < sizeof(*hdr)) {
1136 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1137 HOSTAPD_LEVEL_WARNING, "too short EAP packet "
1138 "received from authentication server");
1139 wpabuf_free(eap);
1140 sm->eap_if->aaaEapNoReq = TRUE;
1141 return;
1142 }
1143
1144 if (wpabuf_len(eap) > sizeof(*hdr))
1145 eap_type = (wpabuf_head_u8(eap))[sizeof(*hdr)];
1146
1147 hdr = wpabuf_head(eap);
1148 switch (hdr->code) {
1149 case EAP_CODE_REQUEST:
1150 if (eap_type >= 0)
1151 sm->eap_type_authsrv = eap_type;
1152 os_snprintf(buf, sizeof(buf), "EAP-Request-%s (%d)",
1153 eap_type >= 0 ? eap_server_get_name(0, eap_type) :
1154 "??",
1155 eap_type);
1156 break;
1157 case EAP_CODE_RESPONSE:
1158 os_snprintf(buf, sizeof(buf), "EAP Response-%s (%d)",
1159 eap_type >= 0 ? eap_server_get_name(0, eap_type) :
1160 "??",
1161 eap_type);
1162 break;
1163 case EAP_CODE_SUCCESS:
1164 os_strlcpy(buf, "EAP Success", sizeof(buf));
1165 break;
1166 case EAP_CODE_FAILURE:
1167 os_strlcpy(buf, "EAP Failure", sizeof(buf));
1168 break;
1169 default:
1170 os_strlcpy(buf, "unknown EAP code", sizeof(buf));
1171 break;
1172 }
1173 buf[sizeof(buf) - 1] = '\0';
1174 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1175 HOSTAPD_LEVEL_DEBUG, "decapsulated EAP packet (code=%d "
1176 "id=%d len=%d) from RADIUS server: %s",
1177 hdr->code, hdr->identifier, be_to_host16(hdr->length),
1178 buf);
1179 sm->eap_if->aaaEapReq = TRUE;
1180
1181 wpabuf_free(sm->eap_if->aaaEapReqData);
1182 sm->eap_if->aaaEapReqData = eap;
1183 }
1184
1185
ieee802_1x_get_keys(struct hostapd_data * hapd,struct sta_info * sta,struct radius_msg * msg,struct radius_msg * req,const u8 * shared_secret,size_t shared_secret_len)1186 static void ieee802_1x_get_keys(struct hostapd_data *hapd,
1187 struct sta_info *sta, struct radius_msg *msg,
1188 struct radius_msg *req,
1189 const u8 *shared_secret,
1190 size_t shared_secret_len)
1191 {
1192 struct radius_ms_mppe_keys *keys;
1193 struct eapol_state_machine *sm = sta->eapol_sm;
1194 if (sm == NULL)
1195 return;
1196
1197 keys = radius_msg_get_ms_keys(msg, req, shared_secret,
1198 shared_secret_len);
1199
1200 if (keys && keys->send && keys->recv) {
1201 size_t len = keys->send_len + keys->recv_len;
1202 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Send-Key",
1203 keys->send, keys->send_len);
1204 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Recv-Key",
1205 keys->recv, keys->recv_len);
1206
1207 os_free(sm->eap_if->aaaEapKeyData);
1208 sm->eap_if->aaaEapKeyData = os_malloc(len);
1209 if (sm->eap_if->aaaEapKeyData) {
1210 os_memcpy(sm->eap_if->aaaEapKeyData, keys->recv,
1211 keys->recv_len);
1212 os_memcpy(sm->eap_if->aaaEapKeyData + keys->recv_len,
1213 keys->send, keys->send_len);
1214 sm->eap_if->aaaEapKeyDataLen = len;
1215 sm->eap_if->aaaEapKeyAvailable = TRUE;
1216 }
1217 }
1218
1219 if (keys) {
1220 os_free(keys->send);
1221 os_free(keys->recv);
1222 os_free(keys);
1223 }
1224 }
1225
1226
ieee802_1x_store_radius_class(struct hostapd_data * hapd,struct sta_info * sta,struct radius_msg * msg)1227 static void ieee802_1x_store_radius_class(struct hostapd_data *hapd,
1228 struct sta_info *sta,
1229 struct radius_msg *msg)
1230 {
1231 u8 *class;
1232 size_t class_len;
1233 struct eapol_state_machine *sm = sta->eapol_sm;
1234 int count, i;
1235 struct radius_attr_data *nclass;
1236 size_t nclass_count;
1237
1238 if (!hapd->conf->radius->acct_server || hapd->radius == NULL ||
1239 sm == NULL)
1240 return;
1241
1242 radius_free_class(&sm->radius_class);
1243 count = radius_msg_count_attr(msg, RADIUS_ATTR_CLASS, 1);
1244 if (count <= 0)
1245 return;
1246
1247 nclass = os_calloc(count, sizeof(struct radius_attr_data));
1248 if (nclass == NULL)
1249 return;
1250
1251 nclass_count = 0;
1252
1253 class = NULL;
1254 for (i = 0; i < count; i++) {
1255 do {
1256 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CLASS,
1257 &class, &class_len,
1258 class) < 0) {
1259 i = count;
1260 break;
1261 }
1262 } while (class_len < 1);
1263
1264 nclass[nclass_count].data = os_malloc(class_len);
1265 if (nclass[nclass_count].data == NULL)
1266 break;
1267
1268 os_memcpy(nclass[nclass_count].data, class, class_len);
1269 nclass[nclass_count].len = class_len;
1270 nclass_count++;
1271 }
1272
1273 sm->radius_class.attr = nclass;
1274 sm->radius_class.count = nclass_count;
1275 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Stored %lu RADIUS Class "
1276 "attributes for " MACSTR,
1277 (unsigned long) sm->radius_class.count,
1278 MAC2STR(sta->addr));
1279 }
1280
1281
1282 /* Update sta->identity based on User-Name attribute in Access-Accept */
ieee802_1x_update_sta_identity(struct hostapd_data * hapd,struct sta_info * sta,struct radius_msg * msg)1283 static void ieee802_1x_update_sta_identity(struct hostapd_data *hapd,
1284 struct sta_info *sta,
1285 struct radius_msg *msg)
1286 {
1287 u8 *buf, *identity;
1288 size_t len;
1289 struct eapol_state_machine *sm = sta->eapol_sm;
1290
1291 if (sm == NULL)
1292 return;
1293
1294 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_USER_NAME, &buf, &len,
1295 NULL) < 0)
1296 return;
1297
1298 identity = (u8 *) dup_binstr(buf, len);
1299 if (identity == NULL)
1300 return;
1301
1302 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1303 HOSTAPD_LEVEL_DEBUG, "old identity '%s' updated with "
1304 "User-Name from Access-Accept '%s'",
1305 sm->identity ? (char *) sm->identity : "N/A",
1306 (char *) identity);
1307
1308 os_free(sm->identity);
1309 sm->identity = identity;
1310 sm->identity_len = len;
1311 }
1312
1313
1314 /* Update CUI based on Chargeable-User-Identity attribute in Access-Accept */
ieee802_1x_update_sta_cui(struct hostapd_data * hapd,struct sta_info * sta,struct radius_msg * msg)1315 static void ieee802_1x_update_sta_cui(struct hostapd_data *hapd,
1316 struct sta_info *sta,
1317 struct radius_msg *msg)
1318 {
1319 struct eapol_state_machine *sm = sta->eapol_sm;
1320 struct wpabuf *cui;
1321 u8 *buf;
1322 size_t len;
1323
1324 if (sm == NULL)
1325 return;
1326
1327 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CHARGEABLE_USER_IDENTITY,
1328 &buf, &len, NULL) < 0)
1329 return;
1330
1331 cui = wpabuf_alloc_copy(buf, len);
1332 if (cui == NULL)
1333 return;
1334
1335 wpabuf_free(sm->radius_cui);
1336 sm->radius_cui = cui;
1337 }
1338
1339
1340 #ifdef CONFIG_HS20
1341
ieee802_1x_hs20_sub_rem(struct sta_info * sta,u8 * pos,size_t len)1342 static void ieee802_1x_hs20_sub_rem(struct sta_info *sta, u8 *pos, size_t len)
1343 {
1344 sta->remediation = 1;
1345 os_free(sta->remediation_url);
1346 if (len > 2) {
1347 sta->remediation_url = os_malloc(len);
1348 if (!sta->remediation_url)
1349 return;
1350 sta->remediation_method = pos[0];
1351 os_memcpy(sta->remediation_url, pos + 1, len - 1);
1352 sta->remediation_url[len - 1] = '\0';
1353 wpa_printf(MSG_DEBUG, "HS 2.0: Subscription remediation needed "
1354 "for " MACSTR " - server method %u URL %s",
1355 MAC2STR(sta->addr), sta->remediation_method,
1356 sta->remediation_url);
1357 } else {
1358 sta->remediation_url = NULL;
1359 wpa_printf(MSG_DEBUG, "HS 2.0: Subscription remediation needed "
1360 "for " MACSTR, MAC2STR(sta->addr));
1361 }
1362 /* TODO: assign the STA into remediation VLAN or add filtering */
1363 }
1364
1365
ieee802_1x_hs20_deauth_req(struct hostapd_data * hapd,struct sta_info * sta,u8 * pos,size_t len)1366 static void ieee802_1x_hs20_deauth_req(struct hostapd_data *hapd,
1367 struct sta_info *sta, u8 *pos,
1368 size_t len)
1369 {
1370 if (len < 3)
1371 return; /* Malformed information */
1372 sta->hs20_deauth_requested = 1;
1373 wpa_printf(MSG_DEBUG, "HS 2.0: Deauthentication request - Code %u "
1374 "Re-auth Delay %u",
1375 *pos, WPA_GET_LE16(pos + 1));
1376 wpabuf_free(sta->hs20_deauth_req);
1377 sta->hs20_deauth_req = wpabuf_alloc(len + 1);
1378 if (sta->hs20_deauth_req) {
1379 wpabuf_put_data(sta->hs20_deauth_req, pos, 3);
1380 wpabuf_put_u8(sta->hs20_deauth_req, len - 3);
1381 wpabuf_put_data(sta->hs20_deauth_req, pos + 3, len - 3);
1382 }
1383 ap_sta_session_timeout(hapd, sta, hapd->conf->hs20_deauth_req_timeout);
1384 }
1385
1386
ieee802_1x_hs20_session_info(struct hostapd_data * hapd,struct sta_info * sta,u8 * pos,size_t len,int session_timeout)1387 static void ieee802_1x_hs20_session_info(struct hostapd_data *hapd,
1388 struct sta_info *sta, u8 *pos,
1389 size_t len, int session_timeout)
1390 {
1391 unsigned int swt;
1392 int warning_time, beacon_int;
1393
1394 if (len < 1)
1395 return; /* Malformed information */
1396 os_free(sta->hs20_session_info_url);
1397 sta->hs20_session_info_url = os_malloc(len);
1398 if (sta->hs20_session_info_url == NULL)
1399 return;
1400 swt = pos[0];
1401 os_memcpy(sta->hs20_session_info_url, pos + 1, len - 1);
1402 sta->hs20_session_info_url[len - 1] = '\0';
1403 wpa_printf(MSG_DEBUG, "HS 2.0: Session Information URL='%s' SWT=%u "
1404 "(session_timeout=%d)",
1405 sta->hs20_session_info_url, swt, session_timeout);
1406 if (session_timeout < 0) {
1407 wpa_printf(MSG_DEBUG, "HS 2.0: No Session-Timeout set - ignore session info URL");
1408 return;
1409 }
1410 if (swt == 255)
1411 swt = 1; /* Use one minute as the AP selected value */
1412
1413 if ((unsigned int) session_timeout < swt * 60)
1414 warning_time = 0;
1415 else
1416 warning_time = session_timeout - swt * 60;
1417
1418 beacon_int = hapd->iconf->beacon_int;
1419 if (beacon_int < 1)
1420 beacon_int = 100; /* best guess */
1421 sta->hs20_disassoc_timer = swt * 60 * 1000 / beacon_int * 125 / 128;
1422 if (sta->hs20_disassoc_timer > 65535)
1423 sta->hs20_disassoc_timer = 65535;
1424
1425 ap_sta_session_warning_timeout(hapd, sta, warning_time);
1426 }
1427
1428 #endif /* CONFIG_HS20 */
1429
1430
ieee802_1x_check_hs20(struct hostapd_data * hapd,struct sta_info * sta,struct radius_msg * msg,int session_timeout)1431 static void ieee802_1x_check_hs20(struct hostapd_data *hapd,
1432 struct sta_info *sta,
1433 struct radius_msg *msg,
1434 int session_timeout)
1435 {
1436 #ifdef CONFIG_HS20
1437 u8 *buf, *pos, *end, type, sublen;
1438 size_t len;
1439
1440 buf = NULL;
1441 sta->remediation = 0;
1442 sta->hs20_deauth_requested = 0;
1443
1444 for (;;) {
1445 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_VENDOR_SPECIFIC,
1446 &buf, &len, buf) < 0)
1447 break;
1448 if (len < 6)
1449 continue;
1450 pos = buf;
1451 end = buf + len;
1452 if (WPA_GET_BE32(pos) != RADIUS_VENDOR_ID_WFA)
1453 continue;
1454 pos += 4;
1455
1456 type = *pos++;
1457 sublen = *pos++;
1458 if (sublen < 2)
1459 continue; /* invalid length */
1460 sublen -= 2; /* skip header */
1461 if (pos + sublen > end)
1462 continue; /* invalid WFA VSA */
1463
1464 switch (type) {
1465 case RADIUS_VENDOR_ATTR_WFA_HS20_SUBSCR_REMEDIATION:
1466 ieee802_1x_hs20_sub_rem(sta, pos, sublen);
1467 break;
1468 case RADIUS_VENDOR_ATTR_WFA_HS20_DEAUTH_REQ:
1469 ieee802_1x_hs20_deauth_req(hapd, sta, pos, sublen);
1470 break;
1471 case RADIUS_VENDOR_ATTR_WFA_HS20_SESSION_INFO_URL:
1472 ieee802_1x_hs20_session_info(hapd, sta, pos, sublen,
1473 session_timeout);
1474 break;
1475 }
1476 }
1477 #endif /* CONFIG_HS20 */
1478 }
1479
1480
1481 struct sta_id_search {
1482 u8 identifier;
1483 struct eapol_state_machine *sm;
1484 };
1485
1486
ieee802_1x_select_radius_identifier(struct hostapd_data * hapd,struct sta_info * sta,void * ctx)1487 static int ieee802_1x_select_radius_identifier(struct hostapd_data *hapd,
1488 struct sta_info *sta,
1489 void *ctx)
1490 {
1491 struct sta_id_search *id_search = ctx;
1492 struct eapol_state_machine *sm = sta->eapol_sm;
1493
1494 if (sm && sm->radius_identifier >= 0 &&
1495 sm->radius_identifier == id_search->identifier) {
1496 id_search->sm = sm;
1497 return 1;
1498 }
1499 return 0;
1500 }
1501
1502
1503 static struct eapol_state_machine *
ieee802_1x_search_radius_identifier(struct hostapd_data * hapd,u8 identifier)1504 ieee802_1x_search_radius_identifier(struct hostapd_data *hapd, u8 identifier)
1505 {
1506 struct sta_id_search id_search;
1507 id_search.identifier = identifier;
1508 id_search.sm = NULL;
1509 ap_for_each_sta(hapd, ieee802_1x_select_radius_identifier, &id_search);
1510 return id_search.sm;
1511 }
1512
1513
1514 /**
1515 * ieee802_1x_receive_auth - Process RADIUS frames from Authentication Server
1516 * @msg: RADIUS response message
1517 * @req: RADIUS request message
1518 * @shared_secret: RADIUS shared secret
1519 * @shared_secret_len: Length of shared_secret in octets
1520 * @data: Context data (struct hostapd_data *)
1521 * Returns: Processing status
1522 */
1523 static RadiusRxResult
ieee802_1x_receive_auth(struct radius_msg * msg,struct radius_msg * req,const u8 * shared_secret,size_t shared_secret_len,void * data)1524 ieee802_1x_receive_auth(struct radius_msg *msg, struct radius_msg *req,
1525 const u8 *shared_secret, size_t shared_secret_len,
1526 void *data)
1527 {
1528 struct hostapd_data *hapd = data;
1529 struct sta_info *sta;
1530 u32 session_timeout = 0, termination_action, acct_interim_interval;
1531 int session_timeout_set, old_vlanid = 0;
1532 struct eapol_state_machine *sm;
1533 int override_eapReq = 0;
1534 struct radius_hdr *hdr = radius_msg_get_hdr(msg);
1535
1536 sm = ieee802_1x_search_radius_identifier(hapd, hdr->identifier);
1537 if (sm == NULL) {
1538 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Could not find matching "
1539 "station for this RADIUS message");
1540 return RADIUS_RX_UNKNOWN;
1541 }
1542 sta = sm->sta;
1543
1544 /* RFC 2869, Ch. 5.13: valid Message-Authenticator attribute MUST be
1545 * present when packet contains an EAP-Message attribute */
1546 if (hdr->code == RADIUS_CODE_ACCESS_REJECT &&
1547 radius_msg_get_attr(msg, RADIUS_ATTR_MESSAGE_AUTHENTICATOR, NULL,
1548 0) < 0 &&
1549 radius_msg_get_attr(msg, RADIUS_ATTR_EAP_MESSAGE, NULL, 0) < 0) {
1550 wpa_printf(MSG_DEBUG, "Allowing RADIUS Access-Reject without "
1551 "Message-Authenticator since it does not include "
1552 "EAP-Message");
1553 } else if (radius_msg_verify(msg, shared_secret, shared_secret_len,
1554 req, 1)) {
1555 wpa_printf(MSG_INFO, "Incoming RADIUS packet did not have correct Message-Authenticator - dropped");
1556 return RADIUS_RX_INVALID_AUTHENTICATOR;
1557 }
1558
1559 if (hdr->code != RADIUS_CODE_ACCESS_ACCEPT &&
1560 hdr->code != RADIUS_CODE_ACCESS_REJECT &&
1561 hdr->code != RADIUS_CODE_ACCESS_CHALLENGE) {
1562 wpa_printf(MSG_INFO, "Unknown RADIUS message code");
1563 return RADIUS_RX_UNKNOWN;
1564 }
1565
1566 sm->radius_identifier = -1;
1567 wpa_printf(MSG_DEBUG, "RADIUS packet matching with station " MACSTR,
1568 MAC2STR(sta->addr));
1569
1570 radius_msg_free(sm->last_recv_radius);
1571 sm->last_recv_radius = msg;
1572
1573 session_timeout_set =
1574 !radius_msg_get_attr_int32(msg, RADIUS_ATTR_SESSION_TIMEOUT,
1575 &session_timeout);
1576 if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_TERMINATION_ACTION,
1577 &termination_action))
1578 termination_action = RADIUS_TERMINATION_ACTION_DEFAULT;
1579
1580 if (hapd->conf->acct_interim_interval == 0 &&
1581 hdr->code == RADIUS_CODE_ACCESS_ACCEPT &&
1582 radius_msg_get_attr_int32(msg, RADIUS_ATTR_ACCT_INTERIM_INTERVAL,
1583 &acct_interim_interval) == 0) {
1584 if (acct_interim_interval < 60) {
1585 hostapd_logger(hapd, sta->addr,
1586 HOSTAPD_MODULE_IEEE8021X,
1587 HOSTAPD_LEVEL_INFO,
1588 "ignored too small "
1589 "Acct-Interim-Interval %d",
1590 acct_interim_interval);
1591 } else
1592 sta->acct_interim_interval = acct_interim_interval;
1593 }
1594
1595
1596 switch (hdr->code) {
1597 case RADIUS_CODE_ACCESS_ACCEPT:
1598 if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
1599 sta->vlan_id = 0;
1600 #ifndef CONFIG_NO_VLAN
1601 else {
1602 old_vlanid = sta->vlan_id;
1603 sta->vlan_id = radius_msg_get_vlanid(msg);
1604 }
1605 if (sta->vlan_id > 0 &&
1606 hostapd_vlan_id_valid(hapd->conf->vlan, sta->vlan_id)) {
1607 hostapd_logger(hapd, sta->addr,
1608 HOSTAPD_MODULE_RADIUS,
1609 HOSTAPD_LEVEL_INFO,
1610 "VLAN ID %d", sta->vlan_id);
1611 } else if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_REQUIRED) {
1612 sta->eapol_sm->authFail = TRUE;
1613 hostapd_logger(hapd, sta->addr,
1614 HOSTAPD_MODULE_IEEE8021X,
1615 HOSTAPD_LEVEL_INFO, "authentication "
1616 "server did not include required VLAN "
1617 "ID in Access-Accept");
1618 break;
1619 }
1620 #endif /* CONFIG_NO_VLAN */
1621
1622 if (ap_sta_bind_vlan(hapd, sta, old_vlanid) < 0)
1623 break;
1624
1625 sta->session_timeout_set = !!session_timeout_set;
1626 sta->session_timeout = session_timeout;
1627
1628 /* RFC 3580, Ch. 3.17 */
1629 if (session_timeout_set && termination_action ==
1630 RADIUS_TERMINATION_ACTION_RADIUS_REQUEST) {
1631 sm->reAuthPeriod = session_timeout;
1632 } else if (session_timeout_set)
1633 ap_sta_session_timeout(hapd, sta, session_timeout);
1634
1635 sm->eap_if->aaaSuccess = TRUE;
1636 override_eapReq = 1;
1637 ieee802_1x_get_keys(hapd, sta, msg, req, shared_secret,
1638 shared_secret_len);
1639 ieee802_1x_store_radius_class(hapd, sta, msg);
1640 ieee802_1x_update_sta_identity(hapd, sta, msg);
1641 ieee802_1x_update_sta_cui(hapd, sta, msg);
1642 ieee802_1x_check_hs20(hapd, sta, msg,
1643 session_timeout_set ?
1644 (int) session_timeout : -1);
1645 if (sm->eap_if->eapKeyAvailable && !sta->remediation &&
1646 !sta->hs20_deauth_requested &&
1647 wpa_auth_pmksa_add(sta->wpa_sm, sm->eapol_key_crypt,
1648 session_timeout_set ?
1649 (int) session_timeout : -1, sm) == 0) {
1650 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
1651 HOSTAPD_LEVEL_DEBUG,
1652 "Added PMKSA cache entry");
1653 }
1654 break;
1655 case RADIUS_CODE_ACCESS_REJECT:
1656 sm->eap_if->aaaFail = TRUE;
1657 override_eapReq = 1;
1658 break;
1659 case RADIUS_CODE_ACCESS_CHALLENGE:
1660 sm->eap_if->aaaEapReq = TRUE;
1661 if (session_timeout_set) {
1662 /* RFC 2869, Ch. 2.3.2; RFC 3580, Ch. 3.17 */
1663 sm->eap_if->aaaMethodTimeout = session_timeout;
1664 hostapd_logger(hapd, sm->addr,
1665 HOSTAPD_MODULE_IEEE8021X,
1666 HOSTAPD_LEVEL_DEBUG,
1667 "using EAP timeout of %d seconds (from "
1668 "RADIUS)",
1669 sm->eap_if->aaaMethodTimeout);
1670 } else {
1671 /*
1672 * Use dynamic retransmission behavior per EAP
1673 * specification.
1674 */
1675 sm->eap_if->aaaMethodTimeout = 0;
1676 }
1677 break;
1678 }
1679
1680 ieee802_1x_decapsulate_radius(hapd, sta);
1681 if (override_eapReq)
1682 sm->eap_if->aaaEapReq = FALSE;
1683
1684 eapol_auth_step(sm);
1685
1686 return RADIUS_RX_QUEUED;
1687 }
1688 #endif /* CONFIG_NO_RADIUS */
1689
1690
ieee802_1x_abort_auth(struct hostapd_data * hapd,struct sta_info * sta)1691 void ieee802_1x_abort_auth(struct hostapd_data *hapd, struct sta_info *sta)
1692 {
1693 struct eapol_state_machine *sm = sta->eapol_sm;
1694 if (sm == NULL)
1695 return;
1696
1697 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1698 HOSTAPD_LEVEL_DEBUG, "aborting authentication");
1699
1700 #ifndef CONFIG_NO_RADIUS
1701 radius_msg_free(sm->last_recv_radius);
1702 sm->last_recv_radius = NULL;
1703 #endif /* CONFIG_NO_RADIUS */
1704
1705 if (sm->eap_if->eapTimeout) {
1706 /*
1707 * Disconnect the STA since it did not reply to the last EAP
1708 * request and we cannot continue EAP processing (EAP-Failure
1709 * could only be sent if the EAP peer actually replied).
1710 */
1711 wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "EAP Timeout, STA " MACSTR,
1712 MAC2STR(sta->addr));
1713
1714 sm->eap_if->portEnabled = FALSE;
1715 ap_sta_disconnect(hapd, sta, sta->addr,
1716 WLAN_REASON_PREV_AUTH_NOT_VALID);
1717 }
1718 }
1719
1720
ieee802_1x_rekey_broadcast(struct hostapd_data * hapd)1721 static int ieee802_1x_rekey_broadcast(struct hostapd_data *hapd)
1722 {
1723 struct eapol_authenticator *eapol = hapd->eapol_auth;
1724
1725 if (hapd->conf->default_wep_key_len < 1)
1726 return 0;
1727
1728 os_free(eapol->default_wep_key);
1729 eapol->default_wep_key = os_malloc(hapd->conf->default_wep_key_len);
1730 if (eapol->default_wep_key == NULL ||
1731 random_get_bytes(eapol->default_wep_key,
1732 hapd->conf->default_wep_key_len)) {
1733 wpa_printf(MSG_INFO, "Could not generate random WEP key");
1734 os_free(eapol->default_wep_key);
1735 eapol->default_wep_key = NULL;
1736 return -1;
1737 }
1738
1739 wpa_hexdump_key(MSG_DEBUG, "IEEE 802.1X: New default WEP key",
1740 eapol->default_wep_key,
1741 hapd->conf->default_wep_key_len);
1742
1743 return 0;
1744 }
1745
1746
ieee802_1x_sta_key_available(struct hostapd_data * hapd,struct sta_info * sta,void * ctx)1747 static int ieee802_1x_sta_key_available(struct hostapd_data *hapd,
1748 struct sta_info *sta, void *ctx)
1749 {
1750 if (sta->eapol_sm) {
1751 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
1752 eapol_auth_step(sta->eapol_sm);
1753 }
1754 return 0;
1755 }
1756
1757
ieee802_1x_rekey(void * eloop_ctx,void * timeout_ctx)1758 static void ieee802_1x_rekey(void *eloop_ctx, void *timeout_ctx)
1759 {
1760 struct hostapd_data *hapd = eloop_ctx;
1761 struct eapol_authenticator *eapol = hapd->eapol_auth;
1762
1763 if (eapol->default_wep_key_idx >= 3)
1764 eapol->default_wep_key_idx =
1765 hapd->conf->individual_wep_key_len > 0 ? 1 : 0;
1766 else
1767 eapol->default_wep_key_idx++;
1768
1769 wpa_printf(MSG_DEBUG, "IEEE 802.1X: New default WEP key index %d",
1770 eapol->default_wep_key_idx);
1771
1772 if (ieee802_1x_rekey_broadcast(hapd)) {
1773 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1774 HOSTAPD_LEVEL_WARNING, "failed to generate a "
1775 "new broadcast key");
1776 os_free(eapol->default_wep_key);
1777 eapol->default_wep_key = NULL;
1778 return;
1779 }
1780
1781 /* TODO: Could setup key for RX here, but change default TX keyid only
1782 * after new broadcast key has been sent to all stations. */
1783 if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
1784 broadcast_ether_addr,
1785 eapol->default_wep_key_idx, 1, NULL, 0,
1786 eapol->default_wep_key,
1787 hapd->conf->default_wep_key_len)) {
1788 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1789 HOSTAPD_LEVEL_WARNING, "failed to configure a "
1790 "new broadcast key");
1791 os_free(eapol->default_wep_key);
1792 eapol->default_wep_key = NULL;
1793 return;
1794 }
1795
1796 ap_for_each_sta(hapd, ieee802_1x_sta_key_available, NULL);
1797
1798 if (hapd->conf->wep_rekeying_period > 0) {
1799 eloop_register_timeout(hapd->conf->wep_rekeying_period, 0,
1800 ieee802_1x_rekey, hapd, NULL);
1801 }
1802 }
1803
1804
ieee802_1x_eapol_send(void * ctx,void * sta_ctx,u8 type,const u8 * data,size_t datalen)1805 static void ieee802_1x_eapol_send(void *ctx, void *sta_ctx, u8 type,
1806 const u8 *data, size_t datalen)
1807 {
1808 #ifdef CONFIG_WPS
1809 struct sta_info *sta = sta_ctx;
1810
1811 if ((sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) ==
1812 WLAN_STA_MAYBE_WPS) {
1813 const u8 *identity;
1814 size_t identity_len;
1815 struct eapol_state_machine *sm = sta->eapol_sm;
1816
1817 identity = eap_get_identity(sm->eap, &identity_len);
1818 if (identity &&
1819 ((identity_len == WSC_ID_ENROLLEE_LEN &&
1820 os_memcmp(identity, WSC_ID_ENROLLEE,
1821 WSC_ID_ENROLLEE_LEN) == 0) ||
1822 (identity_len == WSC_ID_REGISTRAR_LEN &&
1823 os_memcmp(identity, WSC_ID_REGISTRAR,
1824 WSC_ID_REGISTRAR_LEN) == 0))) {
1825 wpa_printf(MSG_DEBUG, "WPS: WLAN_STA_MAYBE_WPS -> "
1826 "WLAN_STA_WPS");
1827 sta->flags |= WLAN_STA_WPS;
1828 }
1829 }
1830 #endif /* CONFIG_WPS */
1831
1832 ieee802_1x_send(ctx, sta_ctx, type, data, datalen);
1833 }
1834
1835
ieee802_1x_aaa_send(void * ctx,void * sta_ctx,const u8 * data,size_t datalen)1836 static void ieee802_1x_aaa_send(void *ctx, void *sta_ctx,
1837 const u8 *data, size_t datalen)
1838 {
1839 #ifndef CONFIG_NO_RADIUS
1840 struct hostapd_data *hapd = ctx;
1841 struct sta_info *sta = sta_ctx;
1842
1843 ieee802_1x_encapsulate_radius(hapd, sta, data, datalen);
1844 #endif /* CONFIG_NO_RADIUS */
1845 }
1846
1847
_ieee802_1x_finished(void * ctx,void * sta_ctx,int success,int preauth,int remediation)1848 static void _ieee802_1x_finished(void *ctx, void *sta_ctx, int success,
1849 int preauth, int remediation)
1850 {
1851 struct hostapd_data *hapd = ctx;
1852 struct sta_info *sta = sta_ctx;
1853 if (preauth)
1854 rsn_preauth_finished(hapd, sta, success);
1855 else
1856 ieee802_1x_finished(hapd, sta, success, remediation);
1857 }
1858
1859
ieee802_1x_get_eap_user(void * ctx,const u8 * identity,size_t identity_len,int phase2,struct eap_user * user)1860 static int ieee802_1x_get_eap_user(void *ctx, const u8 *identity,
1861 size_t identity_len, int phase2,
1862 struct eap_user *user)
1863 {
1864 struct hostapd_data *hapd = ctx;
1865 const struct hostapd_eap_user *eap_user;
1866 int i;
1867
1868 eap_user = hostapd_get_eap_user(hapd, identity, identity_len, phase2);
1869 if (eap_user == NULL)
1870 return -1;
1871
1872 os_memset(user, 0, sizeof(*user));
1873 user->phase2 = phase2;
1874 for (i = 0; i < EAP_MAX_METHODS; i++) {
1875 user->methods[i].vendor = eap_user->methods[i].vendor;
1876 user->methods[i].method = eap_user->methods[i].method;
1877 }
1878
1879 if (eap_user->password) {
1880 user->password = os_malloc(eap_user->password_len);
1881 if (user->password == NULL)
1882 return -1;
1883 os_memcpy(user->password, eap_user->password,
1884 eap_user->password_len);
1885 user->password_len = eap_user->password_len;
1886 user->password_hash = eap_user->password_hash;
1887 }
1888 user->force_version = eap_user->force_version;
1889 user->macacl = eap_user->macacl;
1890 user->ttls_auth = eap_user->ttls_auth;
1891 user->remediation = eap_user->remediation;
1892
1893 return 0;
1894 }
1895
1896
ieee802_1x_sta_entry_alive(void * ctx,const u8 * addr)1897 static int ieee802_1x_sta_entry_alive(void *ctx, const u8 *addr)
1898 {
1899 struct hostapd_data *hapd = ctx;
1900 struct sta_info *sta;
1901 sta = ap_get_sta(hapd, addr);
1902 if (sta == NULL || sta->eapol_sm == NULL)
1903 return 0;
1904 return 1;
1905 }
1906
1907
ieee802_1x_logger(void * ctx,const u8 * addr,eapol_logger_level level,const char * txt)1908 static void ieee802_1x_logger(void *ctx, const u8 *addr,
1909 eapol_logger_level level, const char *txt)
1910 {
1911 #ifndef CONFIG_NO_HOSTAPD_LOGGER
1912 struct hostapd_data *hapd = ctx;
1913 int hlevel;
1914
1915 switch (level) {
1916 case EAPOL_LOGGER_WARNING:
1917 hlevel = HOSTAPD_LEVEL_WARNING;
1918 break;
1919 case EAPOL_LOGGER_INFO:
1920 hlevel = HOSTAPD_LEVEL_INFO;
1921 break;
1922 case EAPOL_LOGGER_DEBUG:
1923 default:
1924 hlevel = HOSTAPD_LEVEL_DEBUG;
1925 break;
1926 }
1927
1928 hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE8021X, hlevel, "%s",
1929 txt);
1930 #endif /* CONFIG_NO_HOSTAPD_LOGGER */
1931 }
1932
1933
ieee802_1x_set_port_authorized(void * ctx,void * sta_ctx,int authorized)1934 static void ieee802_1x_set_port_authorized(void *ctx, void *sta_ctx,
1935 int authorized)
1936 {
1937 struct hostapd_data *hapd = ctx;
1938 struct sta_info *sta = sta_ctx;
1939 ieee802_1x_set_sta_authorized(hapd, sta, authorized);
1940 }
1941
1942
_ieee802_1x_abort_auth(void * ctx,void * sta_ctx)1943 static void _ieee802_1x_abort_auth(void *ctx, void *sta_ctx)
1944 {
1945 struct hostapd_data *hapd = ctx;
1946 struct sta_info *sta = sta_ctx;
1947 ieee802_1x_abort_auth(hapd, sta);
1948 }
1949
1950
_ieee802_1x_tx_key(void * ctx,void * sta_ctx)1951 static void _ieee802_1x_tx_key(void *ctx, void *sta_ctx)
1952 {
1953 struct hostapd_data *hapd = ctx;
1954 struct sta_info *sta = sta_ctx;
1955 ieee802_1x_tx_key(hapd, sta);
1956 }
1957
1958
ieee802_1x_eapol_event(void * ctx,void * sta_ctx,enum eapol_event type)1959 static void ieee802_1x_eapol_event(void *ctx, void *sta_ctx,
1960 enum eapol_event type)
1961 {
1962 /* struct hostapd_data *hapd = ctx; */
1963 struct sta_info *sta = sta_ctx;
1964 switch (type) {
1965 case EAPOL_AUTH_SM_CHANGE:
1966 wpa_auth_sm_notify(sta->wpa_sm);
1967 break;
1968 case EAPOL_AUTH_REAUTHENTICATE:
1969 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
1970 break;
1971 }
1972 }
1973
1974
ieee802_1x_init(struct hostapd_data * hapd)1975 int ieee802_1x_init(struct hostapd_data *hapd)
1976 {
1977 int i;
1978 struct eapol_auth_config conf;
1979 struct eapol_auth_cb cb;
1980
1981 os_memset(&conf, 0, sizeof(conf));
1982 conf.ctx = hapd;
1983 conf.eap_reauth_period = hapd->conf->eap_reauth_period;
1984 conf.wpa = hapd->conf->wpa;
1985 conf.individual_wep_key_len = hapd->conf->individual_wep_key_len;
1986 conf.eap_server = hapd->conf->eap_server;
1987 conf.ssl_ctx = hapd->ssl_ctx;
1988 conf.msg_ctx = hapd->msg_ctx;
1989 conf.eap_sim_db_priv = hapd->eap_sim_db_priv;
1990 conf.eap_req_id_text = hapd->conf->eap_req_id_text;
1991 conf.eap_req_id_text_len = hapd->conf->eap_req_id_text_len;
1992 conf.pac_opaque_encr_key = hapd->conf->pac_opaque_encr_key;
1993 conf.eap_fast_a_id = hapd->conf->eap_fast_a_id;
1994 conf.eap_fast_a_id_len = hapd->conf->eap_fast_a_id_len;
1995 conf.eap_fast_a_id_info = hapd->conf->eap_fast_a_id_info;
1996 conf.eap_fast_prov = hapd->conf->eap_fast_prov;
1997 conf.pac_key_lifetime = hapd->conf->pac_key_lifetime;
1998 conf.pac_key_refresh_time = hapd->conf->pac_key_refresh_time;
1999 conf.eap_sim_aka_result_ind = hapd->conf->eap_sim_aka_result_ind;
2000 conf.tnc = hapd->conf->tnc;
2001 conf.wps = hapd->wps;
2002 conf.fragment_size = hapd->conf->fragment_size;
2003 conf.pwd_group = hapd->conf->pwd_group;
2004 conf.pbc_in_m1 = hapd->conf->pbc_in_m1;
2005 if (hapd->conf->server_id) {
2006 conf.server_id = (const u8 *) hapd->conf->server_id;
2007 conf.server_id_len = os_strlen(hapd->conf->server_id);
2008 } else {
2009 conf.server_id = (const u8 *) "hostapd";
2010 conf.server_id_len = 7;
2011 }
2012
2013 os_memset(&cb, 0, sizeof(cb));
2014 cb.eapol_send = ieee802_1x_eapol_send;
2015 cb.aaa_send = ieee802_1x_aaa_send;
2016 cb.finished = _ieee802_1x_finished;
2017 cb.get_eap_user = ieee802_1x_get_eap_user;
2018 cb.sta_entry_alive = ieee802_1x_sta_entry_alive;
2019 cb.logger = ieee802_1x_logger;
2020 cb.set_port_authorized = ieee802_1x_set_port_authorized;
2021 cb.abort_auth = _ieee802_1x_abort_auth;
2022 cb.tx_key = _ieee802_1x_tx_key;
2023 cb.eapol_event = ieee802_1x_eapol_event;
2024
2025 hapd->eapol_auth = eapol_auth_init(&conf, &cb);
2026 if (hapd->eapol_auth == NULL)
2027 return -1;
2028
2029 if ((hapd->conf->ieee802_1x || hapd->conf->wpa) &&
2030 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 1))
2031 return -1;
2032
2033 #ifndef CONFIG_NO_RADIUS
2034 if (radius_client_register(hapd->radius, RADIUS_AUTH,
2035 ieee802_1x_receive_auth, hapd))
2036 return -1;
2037 #endif /* CONFIG_NO_RADIUS */
2038
2039 if (hapd->conf->default_wep_key_len) {
2040 for (i = 0; i < 4; i++)
2041 hostapd_drv_set_key(hapd->conf->iface, hapd,
2042 WPA_ALG_NONE, NULL, i, 0, NULL, 0,
2043 NULL, 0);
2044
2045 ieee802_1x_rekey(hapd, NULL);
2046
2047 if (hapd->eapol_auth->default_wep_key == NULL)
2048 return -1;
2049 }
2050
2051 return 0;
2052 }
2053
2054
ieee802_1x_deinit(struct hostapd_data * hapd)2055 void ieee802_1x_deinit(struct hostapd_data *hapd)
2056 {
2057 eloop_cancel_timeout(ieee802_1x_rekey, hapd, NULL);
2058
2059 if (hapd->driver != NULL &&
2060 (hapd->conf->ieee802_1x || hapd->conf->wpa))
2061 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0);
2062
2063 eapol_auth_deinit(hapd->eapol_auth);
2064 hapd->eapol_auth = NULL;
2065 }
2066
2067
ieee802_1x_tx_status(struct hostapd_data * hapd,struct sta_info * sta,const u8 * buf,size_t len,int ack)2068 int ieee802_1x_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
2069 const u8 *buf, size_t len, int ack)
2070 {
2071 struct ieee80211_hdr *hdr;
2072 u8 *pos;
2073 const unsigned char rfc1042_hdr[ETH_ALEN] =
2074 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
2075
2076 if (sta == NULL)
2077 return -1;
2078 if (len < sizeof(*hdr) + sizeof(rfc1042_hdr) + 2)
2079 return 0;
2080
2081 hdr = (struct ieee80211_hdr *) buf;
2082 pos = (u8 *) (hdr + 1);
2083 if (os_memcmp(pos, rfc1042_hdr, sizeof(rfc1042_hdr)) != 0)
2084 return 0;
2085 pos += sizeof(rfc1042_hdr);
2086 if (WPA_GET_BE16(pos) != ETH_P_PAE)
2087 return 0;
2088 pos += 2;
2089
2090 return ieee802_1x_eapol_tx_status(hapd, sta, pos, buf + len - pos,
2091 ack);
2092 }
2093
2094
ieee802_1x_eapol_tx_status(struct hostapd_data * hapd,struct sta_info * sta,const u8 * buf,int len,int ack)2095 int ieee802_1x_eapol_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
2096 const u8 *buf, int len, int ack)
2097 {
2098 const struct ieee802_1x_hdr *xhdr =
2099 (const struct ieee802_1x_hdr *) buf;
2100 const u8 *pos = buf + sizeof(*xhdr);
2101 struct ieee802_1x_eapol_key *key;
2102
2103 if (len < (int) sizeof(*xhdr))
2104 return 0;
2105 wpa_printf(MSG_DEBUG, "IEEE 802.1X: " MACSTR " TX status - version=%d "
2106 "type=%d length=%d - ack=%d",
2107 MAC2STR(sta->addr), xhdr->version, xhdr->type,
2108 be_to_host16(xhdr->length), ack);
2109
2110 if (xhdr->type != IEEE802_1X_TYPE_EAPOL_KEY)
2111 return 0;
2112
2113 if (pos + sizeof(struct wpa_eapol_key) <= buf + len) {
2114 const struct wpa_eapol_key *wpa;
2115 wpa = (const struct wpa_eapol_key *) pos;
2116 if (wpa->type == EAPOL_KEY_TYPE_RSN ||
2117 wpa->type == EAPOL_KEY_TYPE_WPA)
2118 wpa_auth_eapol_key_tx_status(hapd->wpa_auth,
2119 sta->wpa_sm, ack);
2120 }
2121
2122 /* EAPOL EAP-Packet packets are eventually re-sent by either Supplicant
2123 * or Authenticator state machines, but EAPOL-Key packets are not
2124 * retransmitted in case of failure. Try to re-send failed EAPOL-Key
2125 * packets couple of times because otherwise STA keys become
2126 * unsynchronized with AP. */
2127 if (!ack && pos + sizeof(*key) <= buf + len) {
2128 key = (struct ieee802_1x_eapol_key *) pos;
2129 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
2130 HOSTAPD_LEVEL_DEBUG, "did not Ack EAPOL-Key "
2131 "frame (%scast index=%d)",
2132 key->key_index & BIT(7) ? "uni" : "broad",
2133 key->key_index & ~BIT(7));
2134 /* TODO: re-send EAPOL-Key couple of times (with short delay
2135 * between them?). If all attempt fail, report error and
2136 * deauthenticate STA so that it will get new keys when
2137 * authenticating again (e.g., after returning in range).
2138 * Separate limit/transmit state needed both for unicast and
2139 * broadcast keys(?) */
2140 }
2141 /* TODO: could move unicast key configuration from ieee802_1x_tx_key()
2142 * to here and change the key only if the EAPOL-Key packet was Acked.
2143 */
2144
2145 return 1;
2146 }
2147
2148
ieee802_1x_get_identity(struct eapol_state_machine * sm,size_t * len)2149 u8 * ieee802_1x_get_identity(struct eapol_state_machine *sm, size_t *len)
2150 {
2151 if (sm == NULL || sm->identity == NULL)
2152 return NULL;
2153
2154 *len = sm->identity_len;
2155 return sm->identity;
2156 }
2157
2158
ieee802_1x_get_radius_class(struct eapol_state_machine * sm,size_t * len,int idx)2159 u8 * ieee802_1x_get_radius_class(struct eapol_state_machine *sm, size_t *len,
2160 int idx)
2161 {
2162 if (sm == NULL || sm->radius_class.attr == NULL ||
2163 idx >= (int) sm->radius_class.count)
2164 return NULL;
2165
2166 *len = sm->radius_class.attr[idx].len;
2167 return sm->radius_class.attr[idx].data;
2168 }
2169
2170
ieee802_1x_get_radius_cui(struct eapol_state_machine * sm)2171 struct wpabuf * ieee802_1x_get_radius_cui(struct eapol_state_machine *sm)
2172 {
2173 if (sm == NULL)
2174 return NULL;
2175 return sm->radius_cui;
2176 }
2177
2178
ieee802_1x_get_key(struct eapol_state_machine * sm,size_t * len)2179 const u8 * ieee802_1x_get_key(struct eapol_state_machine *sm, size_t *len)
2180 {
2181 *len = 0;
2182 if (sm == NULL)
2183 return NULL;
2184
2185 *len = sm->eap_if->eapKeyDataLen;
2186 return sm->eap_if->eapKeyData;
2187 }
2188
2189
ieee802_1x_notify_port_enabled(struct eapol_state_machine * sm,int enabled)2190 void ieee802_1x_notify_port_enabled(struct eapol_state_machine *sm,
2191 int enabled)
2192 {
2193 if (sm == NULL)
2194 return;
2195 sm->eap_if->portEnabled = enabled ? TRUE : FALSE;
2196 eapol_auth_step(sm);
2197 }
2198
2199
ieee802_1x_notify_port_valid(struct eapol_state_machine * sm,int valid)2200 void ieee802_1x_notify_port_valid(struct eapol_state_machine *sm,
2201 int valid)
2202 {
2203 if (sm == NULL)
2204 return;
2205 sm->portValid = valid ? TRUE : FALSE;
2206 eapol_auth_step(sm);
2207 }
2208
2209
ieee802_1x_notify_pre_auth(struct eapol_state_machine * sm,int pre_auth)2210 void ieee802_1x_notify_pre_auth(struct eapol_state_machine *sm, int pre_auth)
2211 {
2212 if (sm == NULL)
2213 return;
2214 if (pre_auth)
2215 sm->flags |= EAPOL_SM_PREAUTH;
2216 else
2217 sm->flags &= ~EAPOL_SM_PREAUTH;
2218 }
2219
2220
bool_txt(Boolean bool)2221 static const char * bool_txt(Boolean bool)
2222 {
2223 return bool ? "TRUE" : "FALSE";
2224 }
2225
2226
ieee802_1x_get_mib(struct hostapd_data * hapd,char * buf,size_t buflen)2227 int ieee802_1x_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
2228 {
2229 /* TODO */
2230 return 0;
2231 }
2232
2233
ieee802_1x_get_mib_sta(struct hostapd_data * hapd,struct sta_info * sta,char * buf,size_t buflen)2234 int ieee802_1x_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
2235 char *buf, size_t buflen)
2236 {
2237 int len = 0, ret;
2238 struct eapol_state_machine *sm = sta->eapol_sm;
2239 struct os_reltime diff;
2240 const char *name1;
2241 const char *name2;
2242
2243 if (sm == NULL)
2244 return 0;
2245
2246 ret = os_snprintf(buf + len, buflen - len,
2247 "dot1xPaePortNumber=%d\n"
2248 "dot1xPaePortProtocolVersion=%d\n"
2249 "dot1xPaePortCapabilities=1\n"
2250 "dot1xPaePortInitialize=%d\n"
2251 "dot1xPaePortReauthenticate=FALSE\n",
2252 sta->aid,
2253 EAPOL_VERSION,
2254 sm->initialize);
2255 if (ret < 0 || (size_t) ret >= buflen - len)
2256 return len;
2257 len += ret;
2258
2259 /* dot1xAuthConfigTable */
2260 ret = os_snprintf(buf + len, buflen - len,
2261 "dot1xAuthPaeState=%d\n"
2262 "dot1xAuthBackendAuthState=%d\n"
2263 "dot1xAuthAdminControlledDirections=%d\n"
2264 "dot1xAuthOperControlledDirections=%d\n"
2265 "dot1xAuthAuthControlledPortStatus=%d\n"
2266 "dot1xAuthAuthControlledPortControl=%d\n"
2267 "dot1xAuthQuietPeriod=%u\n"
2268 "dot1xAuthServerTimeout=%u\n"
2269 "dot1xAuthReAuthPeriod=%u\n"
2270 "dot1xAuthReAuthEnabled=%s\n"
2271 "dot1xAuthKeyTxEnabled=%s\n",
2272 sm->auth_pae_state + 1,
2273 sm->be_auth_state + 1,
2274 sm->adminControlledDirections,
2275 sm->operControlledDirections,
2276 sm->authPortStatus,
2277 sm->portControl,
2278 sm->quietPeriod,
2279 sm->serverTimeout,
2280 sm->reAuthPeriod,
2281 bool_txt(sm->reAuthEnabled),
2282 bool_txt(sm->keyTxEnabled));
2283 if (ret < 0 || (size_t) ret >= buflen - len)
2284 return len;
2285 len += ret;
2286
2287 /* dot1xAuthStatsTable */
2288 ret = os_snprintf(buf + len, buflen - len,
2289 "dot1xAuthEapolFramesRx=%u\n"
2290 "dot1xAuthEapolFramesTx=%u\n"
2291 "dot1xAuthEapolStartFramesRx=%u\n"
2292 "dot1xAuthEapolLogoffFramesRx=%u\n"
2293 "dot1xAuthEapolRespIdFramesRx=%u\n"
2294 "dot1xAuthEapolRespFramesRx=%u\n"
2295 "dot1xAuthEapolReqIdFramesTx=%u\n"
2296 "dot1xAuthEapolReqFramesTx=%u\n"
2297 "dot1xAuthInvalidEapolFramesRx=%u\n"
2298 "dot1xAuthEapLengthErrorFramesRx=%u\n"
2299 "dot1xAuthLastEapolFrameVersion=%u\n"
2300 "dot1xAuthLastEapolFrameSource=" MACSTR "\n",
2301 sm->dot1xAuthEapolFramesRx,
2302 sm->dot1xAuthEapolFramesTx,
2303 sm->dot1xAuthEapolStartFramesRx,
2304 sm->dot1xAuthEapolLogoffFramesRx,
2305 sm->dot1xAuthEapolRespIdFramesRx,
2306 sm->dot1xAuthEapolRespFramesRx,
2307 sm->dot1xAuthEapolReqIdFramesTx,
2308 sm->dot1xAuthEapolReqFramesTx,
2309 sm->dot1xAuthInvalidEapolFramesRx,
2310 sm->dot1xAuthEapLengthErrorFramesRx,
2311 sm->dot1xAuthLastEapolFrameVersion,
2312 MAC2STR(sm->addr));
2313 if (ret < 0 || (size_t) ret >= buflen - len)
2314 return len;
2315 len += ret;
2316
2317 /* dot1xAuthDiagTable */
2318 ret = os_snprintf(buf + len, buflen - len,
2319 "dot1xAuthEntersConnecting=%u\n"
2320 "dot1xAuthEapLogoffsWhileConnecting=%u\n"
2321 "dot1xAuthEntersAuthenticating=%u\n"
2322 "dot1xAuthAuthSuccessesWhileAuthenticating=%u\n"
2323 "dot1xAuthAuthTimeoutsWhileAuthenticating=%u\n"
2324 "dot1xAuthAuthFailWhileAuthenticating=%u\n"
2325 "dot1xAuthAuthEapStartsWhileAuthenticating=%u\n"
2326 "dot1xAuthAuthEapLogoffWhileAuthenticating=%u\n"
2327 "dot1xAuthAuthReauthsWhileAuthenticated=%u\n"
2328 "dot1xAuthAuthEapStartsWhileAuthenticated=%u\n"
2329 "dot1xAuthAuthEapLogoffWhileAuthenticated=%u\n"
2330 "dot1xAuthBackendResponses=%u\n"
2331 "dot1xAuthBackendAccessChallenges=%u\n"
2332 "dot1xAuthBackendOtherRequestsToSupplicant=%u\n"
2333 "dot1xAuthBackendAuthSuccesses=%u\n"
2334 "dot1xAuthBackendAuthFails=%u\n",
2335 sm->authEntersConnecting,
2336 sm->authEapLogoffsWhileConnecting,
2337 sm->authEntersAuthenticating,
2338 sm->authAuthSuccessesWhileAuthenticating,
2339 sm->authAuthTimeoutsWhileAuthenticating,
2340 sm->authAuthFailWhileAuthenticating,
2341 sm->authAuthEapStartsWhileAuthenticating,
2342 sm->authAuthEapLogoffWhileAuthenticating,
2343 sm->authAuthReauthsWhileAuthenticated,
2344 sm->authAuthEapStartsWhileAuthenticated,
2345 sm->authAuthEapLogoffWhileAuthenticated,
2346 sm->backendResponses,
2347 sm->backendAccessChallenges,
2348 sm->backendOtherRequestsToSupplicant,
2349 sm->backendAuthSuccesses,
2350 sm->backendAuthFails);
2351 if (ret < 0 || (size_t) ret >= buflen - len)
2352 return len;
2353 len += ret;
2354
2355 /* dot1xAuthSessionStatsTable */
2356 os_reltime_age(&sta->acct_session_start, &diff);
2357 ret = os_snprintf(buf + len, buflen - len,
2358 /* TODO: dot1xAuthSessionOctetsRx */
2359 /* TODO: dot1xAuthSessionOctetsTx */
2360 /* TODO: dot1xAuthSessionFramesRx */
2361 /* TODO: dot1xAuthSessionFramesTx */
2362 "dot1xAuthSessionId=%08X-%08X\n"
2363 "dot1xAuthSessionAuthenticMethod=%d\n"
2364 "dot1xAuthSessionTime=%u\n"
2365 "dot1xAuthSessionTerminateCause=999\n"
2366 "dot1xAuthSessionUserName=%s\n",
2367 sta->acct_session_id_hi, sta->acct_session_id_lo,
2368 (wpa_key_mgmt_wpa_ieee8021x(
2369 wpa_auth_sta_key_mgmt(sta->wpa_sm))) ?
2370 1 : 2,
2371 (unsigned int) diff.sec,
2372 sm->identity);
2373 if (ret < 0 || (size_t) ret >= buflen - len)
2374 return len;
2375 len += ret;
2376
2377 name1 = eap_server_get_name(0, sm->eap_type_authsrv);
2378 name2 = eap_server_get_name(0, sm->eap_type_supp);
2379 ret = os_snprintf(buf + len, buflen - len,
2380 "last_eap_type_as=%d (%s)\n"
2381 "last_eap_type_sta=%d (%s)\n",
2382 sm->eap_type_authsrv,
2383 name1 ? name1 : "",
2384 sm->eap_type_supp,
2385 name2 ? name2 : "");
2386 if (ret < 0 || (size_t) ret >= buflen - len)
2387 return len;
2388 len += ret;
2389
2390 return len;
2391 }
2392
2393
ieee802_1x_finished(struct hostapd_data * hapd,struct sta_info * sta,int success,int remediation)2394 static void ieee802_1x_finished(struct hostapd_data *hapd,
2395 struct sta_info *sta, int success,
2396 int remediation)
2397 {
2398 const u8 *key;
2399 size_t len;
2400 /* TODO: get PMKLifetime from WPA parameters */
2401 static const int dot11RSNAConfigPMKLifetime = 43200;
2402 unsigned int session_timeout;
2403
2404 #ifdef CONFIG_HS20
2405 if (remediation && !sta->remediation) {
2406 sta->remediation = 1;
2407 os_free(sta->remediation_url);
2408 sta->remediation_url =
2409 os_strdup(hapd->conf->subscr_remediation_url);
2410 sta->remediation_method = 1; /* SOAP-XML SPP */
2411 }
2412
2413 if (success) {
2414 if (sta->remediation) {
2415 wpa_printf(MSG_DEBUG, "HS 2.0: Send WNM-Notification "
2416 "to " MACSTR " to indicate Subscription "
2417 "Remediation",
2418 MAC2STR(sta->addr));
2419 hs20_send_wnm_notification(hapd, sta->addr,
2420 sta->remediation_method,
2421 sta->remediation_url);
2422 os_free(sta->remediation_url);
2423 sta->remediation_url = NULL;
2424 }
2425
2426 if (sta->hs20_deauth_req) {
2427 wpa_printf(MSG_DEBUG, "HS 2.0: Send WNM-Notification "
2428 "to " MACSTR " to indicate imminent "
2429 "deauthentication", MAC2STR(sta->addr));
2430 hs20_send_wnm_notification_deauth_req(
2431 hapd, sta->addr, sta->hs20_deauth_req);
2432 }
2433 }
2434 #endif /* CONFIG_HS20 */
2435
2436 key = ieee802_1x_get_key(sta->eapol_sm, &len);
2437 if (sta->session_timeout_set)
2438 session_timeout = sta->session_timeout;
2439 else
2440 session_timeout = dot11RSNAConfigPMKLifetime;
2441 if (success && key && len >= PMK_LEN && !sta->remediation &&
2442 !sta->hs20_deauth_requested &&
2443 wpa_auth_pmksa_add(sta->wpa_sm, key, session_timeout,
2444 sta->eapol_sm) == 0) {
2445 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
2446 HOSTAPD_LEVEL_DEBUG,
2447 "Added PMKSA cache entry (IEEE 802.1X)");
2448 }
2449
2450 if (!success) {
2451 /*
2452 * Many devices require deauthentication after WPS provisioning
2453 * and some may not be be able to do that themselves, so
2454 * disconnect the client here. In addition, this may also
2455 * benefit IEEE 802.1X/EAPOL authentication cases, too since
2456 * the EAPOL PAE state machine would remain in HELD state for
2457 * considerable amount of time and some EAP methods, like
2458 * EAP-FAST with anonymous provisioning, may require another
2459 * EAPOL authentication to be started to complete connection.
2460 */
2461 wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "IEEE 802.1X: Force "
2462 "disconnection after EAP-Failure");
2463 /* Add a small sleep to increase likelihood of previously
2464 * requested EAP-Failure TX getting out before this should the
2465 * driver reorder operations.
2466 */
2467 os_sleep(0, 10000);
2468 ap_sta_disconnect(hapd, sta, sta->addr,
2469 WLAN_REASON_IEEE_802_1X_AUTH_FAILED);
2470 hostapd_wps_eap_completed(hapd);
2471 }
2472 }
2473