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 #ifdef CONFIG_TESTING_OPTIONS
70 if (hapd->ext_eapol_frame_io) {
71 size_t hex_len = 2 * len + 1;
72 char *hex = os_malloc(hex_len);
73
74 if (hex) {
75 wpa_snprintf_hex(hex, hex_len, buf, len);
76 wpa_msg(hapd->msg_ctx, MSG_INFO,
77 "EAPOL-TX " MACSTR " %s",
78 MAC2STR(sta->addr), hex);
79 os_free(hex);
80 }
81 } else
82 #endif /* CONFIG_TESTING_OPTIONS */
83 if (sta->flags & WLAN_STA_PREAUTH) {
84 rsn_preauth_send(hapd, sta, buf, len);
85 } else {
86 hostapd_drv_hapd_send_eapol(
87 hapd, sta->addr, buf, len,
88 encrypt, hostapd_sta_flags_to_drv(sta->flags));
89 }
90
91 os_free(buf);
92 }
93
94
ieee802_1x_set_sta_authorized(struct hostapd_data * hapd,struct sta_info * sta,int authorized)95 void ieee802_1x_set_sta_authorized(struct hostapd_data *hapd,
96 struct sta_info *sta, int authorized)
97 {
98 int res;
99
100 if (sta->flags & WLAN_STA_PREAUTH)
101 return;
102
103 if (authorized) {
104 ap_sta_set_authorized(hapd, sta, 1);
105 res = hostapd_set_authorized(hapd, sta, 1);
106 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
107 HOSTAPD_LEVEL_DEBUG, "authorizing port");
108 } else {
109 ap_sta_set_authorized(hapd, sta, 0);
110 res = hostapd_set_authorized(hapd, sta, 0);
111 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
112 HOSTAPD_LEVEL_DEBUG, "unauthorizing port");
113 }
114
115 if (res && errno != ENOENT) {
116 wpa_printf(MSG_DEBUG, "Could not set station " MACSTR
117 " flags for kernel driver (errno=%d).",
118 MAC2STR(sta->addr), errno);
119 }
120
121 if (authorized) {
122 os_get_reltime(&sta->connected_time);
123 accounting_sta_start(hapd, sta);
124 }
125 }
126
127
ieee802_1x_tx_key_one(struct hostapd_data * hapd,struct sta_info * sta,int idx,int broadcast,u8 * key_data,size_t key_len)128 static void ieee802_1x_tx_key_one(struct hostapd_data *hapd,
129 struct sta_info *sta,
130 int idx, int broadcast,
131 u8 *key_data, size_t key_len)
132 {
133 u8 *buf, *ekey;
134 struct ieee802_1x_hdr *hdr;
135 struct ieee802_1x_eapol_key *key;
136 size_t len, ekey_len;
137 struct eapol_state_machine *sm = sta->eapol_sm;
138
139 if (sm == NULL)
140 return;
141
142 len = sizeof(*key) + key_len;
143 buf = os_zalloc(sizeof(*hdr) + len);
144 if (buf == NULL)
145 return;
146
147 hdr = (struct ieee802_1x_hdr *) buf;
148 key = (struct ieee802_1x_eapol_key *) (hdr + 1);
149 key->type = EAPOL_KEY_TYPE_RC4;
150 WPA_PUT_BE16(key->key_length, key_len);
151 wpa_get_ntp_timestamp(key->replay_counter);
152
153 if (random_get_bytes(key->key_iv, sizeof(key->key_iv))) {
154 wpa_printf(MSG_ERROR, "Could not get random numbers");
155 os_free(buf);
156 return;
157 }
158
159 key->key_index = idx | (broadcast ? 0 : BIT(7));
160 if (hapd->conf->eapol_key_index_workaround) {
161 /* According to some information, WinXP Supplicant seems to
162 * interpret bit7 as an indication whether the key is to be
163 * activated, so make it possible to enable workaround that
164 * sets this bit for all keys. */
165 key->key_index |= BIT(7);
166 }
167
168 /* Key is encrypted using "Key-IV + MSK[0..31]" as the RC4-key and
169 * MSK[32..63] is used to sign the message. */
170 if (sm->eap_if->eapKeyData == NULL || sm->eap_if->eapKeyDataLen < 64) {
171 wpa_printf(MSG_ERROR, "No eapKeyData available for encrypting "
172 "and signing EAPOL-Key");
173 os_free(buf);
174 return;
175 }
176 os_memcpy((u8 *) (key + 1), key_data, key_len);
177 ekey_len = sizeof(key->key_iv) + 32;
178 ekey = os_malloc(ekey_len);
179 if (ekey == NULL) {
180 wpa_printf(MSG_ERROR, "Could not encrypt key");
181 os_free(buf);
182 return;
183 }
184 os_memcpy(ekey, key->key_iv, sizeof(key->key_iv));
185 os_memcpy(ekey + sizeof(key->key_iv), sm->eap_if->eapKeyData, 32);
186 rc4_skip(ekey, ekey_len, 0, (u8 *) (key + 1), key_len);
187 os_free(ekey);
188
189 /* This header is needed here for HMAC-MD5, but it will be regenerated
190 * in ieee802_1x_send() */
191 hdr->version = hapd->conf->eapol_version;
192 hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
193 hdr->length = host_to_be16(len);
194 hmac_md5(sm->eap_if->eapKeyData + 32, 32, buf, sizeof(*hdr) + len,
195 key->key_signature);
196
197 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key to " MACSTR
198 " (%s index=%d)", MAC2STR(sm->addr),
199 broadcast ? "broadcast" : "unicast", idx);
200 ieee802_1x_send(hapd, sta, IEEE802_1X_TYPE_EAPOL_KEY, (u8 *) key, len);
201 if (sta->eapol_sm)
202 sta->eapol_sm->dot1xAuthEapolFramesTx++;
203 os_free(buf);
204 }
205
206
ieee802_1x_tx_key(struct hostapd_data * hapd,struct sta_info * sta)207 void ieee802_1x_tx_key(struct hostapd_data *hapd, struct sta_info *sta)
208 {
209 struct eapol_authenticator *eapol = hapd->eapol_auth;
210 struct eapol_state_machine *sm = sta->eapol_sm;
211
212 if (sm == NULL || !sm->eap_if->eapKeyData)
213 return;
214
215 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key(s) to " MACSTR,
216 MAC2STR(sta->addr));
217
218 #ifndef CONFIG_NO_VLAN
219 if (sta->vlan_id > 0 && sta->vlan_id <= MAX_VLAN_ID) {
220 wpa_printf(MSG_ERROR, "Using WEP with vlans is not supported.");
221 return;
222 }
223 #endif /* CONFIG_NO_VLAN */
224
225 if (eapol->default_wep_key) {
226 ieee802_1x_tx_key_one(hapd, sta, eapol->default_wep_key_idx, 1,
227 eapol->default_wep_key,
228 hapd->conf->default_wep_key_len);
229 }
230
231 if (hapd->conf->individual_wep_key_len > 0) {
232 u8 *ikey;
233 ikey = os_malloc(hapd->conf->individual_wep_key_len);
234 if (ikey == NULL ||
235 random_get_bytes(ikey, hapd->conf->individual_wep_key_len))
236 {
237 wpa_printf(MSG_ERROR, "Could not generate random "
238 "individual WEP key.");
239 os_free(ikey);
240 return;
241 }
242
243 wpa_hexdump_key(MSG_DEBUG, "Individual WEP key",
244 ikey, hapd->conf->individual_wep_key_len);
245
246 ieee802_1x_tx_key_one(hapd, sta, 0, 0, ikey,
247 hapd->conf->individual_wep_key_len);
248
249 /* TODO: set encryption in TX callback, i.e., only after STA
250 * has ACKed EAPOL-Key frame */
251 if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
252 sta->addr, 0, 1, NULL, 0, ikey,
253 hapd->conf->individual_wep_key_len)) {
254 wpa_printf(MSG_ERROR, "Could not set individual WEP "
255 "encryption.");
256 }
257
258 os_free(ikey);
259 }
260 }
261
262
radius_mode_txt(struct hostapd_data * hapd)263 const char *radius_mode_txt(struct hostapd_data *hapd)
264 {
265 switch (hapd->iface->conf->hw_mode) {
266 case HOSTAPD_MODE_IEEE80211AD:
267 return "802.11ad";
268 case HOSTAPD_MODE_IEEE80211A:
269 return "802.11a";
270 case HOSTAPD_MODE_IEEE80211G:
271 return "802.11g";
272 case HOSTAPD_MODE_IEEE80211B:
273 default:
274 return "802.11b";
275 }
276 }
277
278
radius_sta_rate(struct hostapd_data * hapd,struct sta_info * sta)279 int radius_sta_rate(struct hostapd_data *hapd, struct sta_info *sta)
280 {
281 int i;
282 u8 rate = 0;
283
284 for (i = 0; i < sta->supported_rates_len; i++)
285 if ((sta->supported_rates[i] & 0x7f) > rate)
286 rate = sta->supported_rates[i] & 0x7f;
287
288 return rate;
289 }
290
291
292 #ifndef CONFIG_NO_RADIUS
ieee802_1x_learn_identity(struct hostapd_data * hapd,struct eapol_state_machine * sm,const u8 * eap,size_t len)293 static void ieee802_1x_learn_identity(struct hostapd_data *hapd,
294 struct eapol_state_machine *sm,
295 const u8 *eap, size_t len)
296 {
297 const u8 *identity;
298 size_t identity_len;
299 const struct eap_hdr *hdr = (const struct eap_hdr *) eap;
300
301 if (len <= sizeof(struct eap_hdr) ||
302 (hdr->code == EAP_CODE_RESPONSE &&
303 eap[sizeof(struct eap_hdr)] != EAP_TYPE_IDENTITY) ||
304 (hdr->code == EAP_CODE_INITIATE &&
305 eap[sizeof(struct eap_hdr)] != EAP_ERP_TYPE_REAUTH) ||
306 (hdr->code != EAP_CODE_RESPONSE &&
307 hdr->code != EAP_CODE_INITIATE))
308 return;
309
310 identity = eap_get_identity(sm->eap, &identity_len);
311 if (identity == NULL)
312 return;
313
314 /* Save station identity for future RADIUS packets */
315 os_free(sm->identity);
316 sm->identity = (u8 *) dup_binstr(identity, identity_len);
317 if (sm->identity == NULL) {
318 sm->identity_len = 0;
319 return;
320 }
321
322 sm->identity_len = identity_len;
323 hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
324 HOSTAPD_LEVEL_DEBUG, "STA identity '%s'", sm->identity);
325 sm->dot1xAuthEapolRespIdFramesRx++;
326 }
327
328
add_common_radius_sta_attr_rsn(struct hostapd_data * hapd,struct hostapd_radius_attr * req_attr,struct sta_info * sta,struct radius_msg * msg)329 static int add_common_radius_sta_attr_rsn(struct hostapd_data *hapd,
330 struct hostapd_radius_attr *req_attr,
331 struct sta_info *sta,
332 struct radius_msg *msg)
333 {
334 u32 suite;
335 int ver, val;
336
337 ver = wpa_auth_sta_wpa_version(sta->wpa_sm);
338 val = wpa_auth_get_pairwise(sta->wpa_sm);
339 suite = wpa_cipher_to_suite(ver, val);
340 if (val != -1 &&
341 !hostapd_config_get_radius_attr(req_attr,
342 RADIUS_ATTR_WLAN_PAIRWISE_CIPHER) &&
343 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_WLAN_PAIRWISE_CIPHER,
344 suite)) {
345 wpa_printf(MSG_ERROR, "Could not add WLAN-Pairwise-Cipher");
346 return -1;
347 }
348
349 suite = wpa_cipher_to_suite(((hapd->conf->wpa & 0x2) ||
350 hapd->conf->osen) ?
351 WPA_PROTO_RSN : WPA_PROTO_WPA,
352 hapd->conf->wpa_group);
353 if (!hostapd_config_get_radius_attr(req_attr,
354 RADIUS_ATTR_WLAN_GROUP_CIPHER) &&
355 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_WLAN_GROUP_CIPHER,
356 suite)) {
357 wpa_printf(MSG_ERROR, "Could not add WLAN-Group-Cipher");
358 return -1;
359 }
360
361 val = wpa_auth_sta_key_mgmt(sta->wpa_sm);
362 suite = wpa_akm_to_suite(val);
363 if (val != -1 &&
364 !hostapd_config_get_radius_attr(req_attr,
365 RADIUS_ATTR_WLAN_AKM_SUITE) &&
366 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_WLAN_AKM_SUITE,
367 suite)) {
368 wpa_printf(MSG_ERROR, "Could not add WLAN-AKM-Suite");
369 return -1;
370 }
371
372 #ifdef CONFIG_IEEE80211W
373 if (hapd->conf->ieee80211w != NO_MGMT_FRAME_PROTECTION) {
374 suite = wpa_cipher_to_suite(WPA_PROTO_RSN,
375 hapd->conf->group_mgmt_cipher);
376 if (!hostapd_config_get_radius_attr(
377 req_attr, RADIUS_ATTR_WLAN_GROUP_MGMT_CIPHER) &&
378 !radius_msg_add_attr_int32(
379 msg, RADIUS_ATTR_WLAN_GROUP_MGMT_CIPHER, suite)) {
380 wpa_printf(MSG_ERROR,
381 "Could not add WLAN-Group-Mgmt-Cipher");
382 return -1;
383 }
384 }
385 #endif /* CONFIG_IEEE80211W */
386
387 return 0;
388 }
389
390
add_common_radius_sta_attr(struct hostapd_data * hapd,struct hostapd_radius_attr * req_attr,struct sta_info * sta,struct radius_msg * msg)391 static int add_common_radius_sta_attr(struct hostapd_data *hapd,
392 struct hostapd_radius_attr *req_attr,
393 struct sta_info *sta,
394 struct radius_msg *msg)
395 {
396 char buf[128];
397
398 if (!hostapd_config_get_radius_attr(req_attr,
399 RADIUS_ATTR_NAS_PORT) &&
400 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT, sta->aid)) {
401 wpa_printf(MSG_ERROR, "Could not add NAS-Port");
402 return -1;
403 }
404
405 os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
406 MAC2STR(sta->addr));
407 buf[sizeof(buf) - 1] = '\0';
408 if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID,
409 (u8 *) buf, os_strlen(buf))) {
410 wpa_printf(MSG_ERROR, "Could not add Calling-Station-Id");
411 return -1;
412 }
413
414 if (sta->flags & WLAN_STA_PREAUTH) {
415 os_strlcpy(buf, "IEEE 802.11i Pre-Authentication",
416 sizeof(buf));
417 } else {
418 os_snprintf(buf, sizeof(buf), "CONNECT %d%sMbps %s",
419 radius_sta_rate(hapd, sta) / 2,
420 (radius_sta_rate(hapd, sta) & 1) ? ".5" : "",
421 radius_mode_txt(hapd));
422 buf[sizeof(buf) - 1] = '\0';
423 }
424 if (!hostapd_config_get_radius_attr(req_attr,
425 RADIUS_ATTR_CONNECT_INFO) &&
426 !radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO,
427 (u8 *) buf, os_strlen(buf))) {
428 wpa_printf(MSG_ERROR, "Could not add Connect-Info");
429 return -1;
430 }
431
432 if (sta->acct_session_id_hi || sta->acct_session_id_lo) {
433 os_snprintf(buf, sizeof(buf), "%08X-%08X",
434 sta->acct_session_id_hi, sta->acct_session_id_lo);
435 if (!radius_msg_add_attr(msg, RADIUS_ATTR_ACCT_SESSION_ID,
436 (u8 *) buf, os_strlen(buf))) {
437 wpa_printf(MSG_ERROR, "Could not add Acct-Session-Id");
438 return -1;
439 }
440 }
441
442 #ifdef CONFIG_IEEE80211R
443 if (hapd->conf->wpa && wpa_key_mgmt_ft(hapd->conf->wpa_key_mgmt) &&
444 sta->wpa_sm &&
445 (wpa_key_mgmt_ft(wpa_auth_sta_key_mgmt(sta->wpa_sm)) ||
446 sta->auth_alg == WLAN_AUTH_FT) &&
447 !hostapd_config_get_radius_attr(req_attr,
448 RADIUS_ATTR_MOBILITY_DOMAIN_ID) &&
449 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_MOBILITY_DOMAIN_ID,
450 WPA_GET_BE16(
451 hapd->conf->mobility_domain))) {
452 wpa_printf(MSG_ERROR, "Could not add Mobility-Domain-Id");
453 return -1;
454 }
455 #endif /* CONFIG_IEEE80211R */
456
457 if ((hapd->conf->wpa || hapd->conf->osen) && sta->wpa_sm &&
458 add_common_radius_sta_attr_rsn(hapd, req_attr, sta, msg) < 0)
459 return -1;
460
461 return 0;
462 }
463
464
add_common_radius_attr(struct hostapd_data * hapd,struct hostapd_radius_attr * req_attr,struct sta_info * sta,struct radius_msg * msg)465 int add_common_radius_attr(struct hostapd_data *hapd,
466 struct hostapd_radius_attr *req_attr,
467 struct sta_info *sta,
468 struct radius_msg *msg)
469 {
470 char buf[128];
471 struct hostapd_radius_attr *attr;
472
473 if (!hostapd_config_get_radius_attr(req_attr,
474 RADIUS_ATTR_NAS_IP_ADDRESS) &&
475 hapd->conf->own_ip_addr.af == AF_INET &&
476 !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS,
477 (u8 *) &hapd->conf->own_ip_addr.u.v4, 4)) {
478 wpa_printf(MSG_ERROR, "Could not add NAS-IP-Address");
479 return -1;
480 }
481
482 #ifdef CONFIG_IPV6
483 if (!hostapd_config_get_radius_attr(req_attr,
484 RADIUS_ATTR_NAS_IPV6_ADDRESS) &&
485 hapd->conf->own_ip_addr.af == AF_INET6 &&
486 !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IPV6_ADDRESS,
487 (u8 *) &hapd->conf->own_ip_addr.u.v6, 16)) {
488 wpa_printf(MSG_ERROR, "Could not add NAS-IPv6-Address");
489 return -1;
490 }
491 #endif /* CONFIG_IPV6 */
492
493 if (!hostapd_config_get_radius_attr(req_attr,
494 RADIUS_ATTR_NAS_IDENTIFIER) &&
495 hapd->conf->nas_identifier &&
496 !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IDENTIFIER,
497 (u8 *) hapd->conf->nas_identifier,
498 os_strlen(hapd->conf->nas_identifier))) {
499 wpa_printf(MSG_ERROR, "Could not add NAS-Identifier");
500 return -1;
501 }
502
503 os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT ":%s",
504 MAC2STR(hapd->own_addr),
505 wpa_ssid_txt(hapd->conf->ssid.ssid,
506 hapd->conf->ssid.ssid_len));
507 buf[sizeof(buf) - 1] = '\0';
508 if (!hostapd_config_get_radius_attr(req_attr,
509 RADIUS_ATTR_CALLED_STATION_ID) &&
510 !radius_msg_add_attr(msg, RADIUS_ATTR_CALLED_STATION_ID,
511 (u8 *) buf, os_strlen(buf))) {
512 wpa_printf(MSG_ERROR, "Could not add Called-Station-Id");
513 return -1;
514 }
515
516 if (!hostapd_config_get_radius_attr(req_attr,
517 RADIUS_ATTR_NAS_PORT_TYPE) &&
518 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT_TYPE,
519 RADIUS_NAS_PORT_TYPE_IEEE_802_11)) {
520 wpa_printf(MSG_ERROR, "Could not add NAS-Port-Type");
521 return -1;
522 }
523
524 #ifdef CONFIG_INTERWORKING
525 if (hapd->conf->interworking &&
526 !is_zero_ether_addr(hapd->conf->hessid)) {
527 os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
528 MAC2STR(hapd->conf->hessid));
529 buf[sizeof(buf) - 1] = '\0';
530 if (!hostapd_config_get_radius_attr(req_attr,
531 RADIUS_ATTR_WLAN_HESSID) &&
532 !radius_msg_add_attr(msg, RADIUS_ATTR_WLAN_HESSID,
533 (u8 *) buf, os_strlen(buf))) {
534 wpa_printf(MSG_ERROR, "Could not add WLAN-HESSID");
535 return -1;
536 }
537 }
538 #endif /* CONFIG_INTERWORKING */
539
540 if (sta && add_common_radius_sta_attr(hapd, req_attr, sta, msg) < 0)
541 return -1;
542
543 for (attr = req_attr; attr; attr = attr->next) {
544 if (!radius_msg_add_attr(msg, attr->type,
545 wpabuf_head(attr->val),
546 wpabuf_len(attr->val))) {
547 wpa_printf(MSG_ERROR, "Could not add RADIUS "
548 "attribute");
549 return -1;
550 }
551 }
552
553 return 0;
554 }
555
556
ieee802_1x_encapsulate_radius(struct hostapd_data * hapd,struct sta_info * sta,const u8 * eap,size_t len)557 static void ieee802_1x_encapsulate_radius(struct hostapd_data *hapd,
558 struct sta_info *sta,
559 const u8 *eap, size_t len)
560 {
561 struct radius_msg *msg;
562 struct eapol_state_machine *sm = sta->eapol_sm;
563
564 if (sm == NULL)
565 return;
566
567 ieee802_1x_learn_identity(hapd, sm, eap, len);
568
569 wpa_printf(MSG_DEBUG, "Encapsulating EAP message into a RADIUS "
570 "packet");
571
572 sm->radius_identifier = radius_client_get_id(hapd->radius);
573 msg = radius_msg_new(RADIUS_CODE_ACCESS_REQUEST,
574 sm->radius_identifier);
575 if (msg == NULL) {
576 wpa_printf(MSG_INFO, "Could not create new RADIUS packet");
577 return;
578 }
579
580 radius_msg_make_authenticator(msg, (u8 *) sta, sizeof(*sta));
581
582 if (sm->identity &&
583 !radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME,
584 sm->identity, sm->identity_len)) {
585 wpa_printf(MSG_INFO, "Could not add User-Name");
586 goto fail;
587 }
588
589 if (add_common_radius_attr(hapd, hapd->conf->radius_auth_req_attr, sta,
590 msg) < 0)
591 goto fail;
592
593 /* TODO: should probably check MTU from driver config; 2304 is max for
594 * IEEE 802.11, but use 1400 to avoid problems with too large packets
595 */
596 if (!hostapd_config_get_radius_attr(hapd->conf->radius_auth_req_attr,
597 RADIUS_ATTR_FRAMED_MTU) &&
598 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_FRAMED_MTU, 1400)) {
599 wpa_printf(MSG_INFO, "Could not add Framed-MTU");
600 goto fail;
601 }
602
603 if (!radius_msg_add_eap(msg, eap, len)) {
604 wpa_printf(MSG_INFO, "Could not add EAP-Message");
605 goto fail;
606 }
607
608 /* State attribute must be copied if and only if this packet is
609 * Access-Request reply to the previous Access-Challenge */
610 if (sm->last_recv_radius &&
611 radius_msg_get_hdr(sm->last_recv_radius)->code ==
612 RADIUS_CODE_ACCESS_CHALLENGE) {
613 int res = radius_msg_copy_attr(msg, sm->last_recv_radius,
614 RADIUS_ATTR_STATE);
615 if (res < 0) {
616 wpa_printf(MSG_INFO, "Could not copy State attribute from previous Access-Challenge");
617 goto fail;
618 }
619 if (res > 0) {
620 wpa_printf(MSG_DEBUG, "Copied RADIUS State Attribute");
621 }
622 }
623
624 if (hapd->conf->radius_request_cui) {
625 const u8 *cui;
626 size_t cui_len;
627 /* Add previously learned CUI or nul CUI to request CUI */
628 if (sm->radius_cui) {
629 cui = wpabuf_head(sm->radius_cui);
630 cui_len = wpabuf_len(sm->radius_cui);
631 } else {
632 cui = (const u8 *) "\0";
633 cui_len = 1;
634 }
635 if (!radius_msg_add_attr(msg,
636 RADIUS_ATTR_CHARGEABLE_USER_IDENTITY,
637 cui, cui_len)) {
638 wpa_printf(MSG_ERROR, "Could not add CUI");
639 goto fail;
640 }
641 }
642
643 #ifdef CONFIG_HS20
644 if (hapd->conf->hs20) {
645 u8 ver = 1; /* Release 2 */
646 if (!radius_msg_add_wfa(
647 msg, RADIUS_VENDOR_ATTR_WFA_HS20_AP_VERSION,
648 &ver, 1)) {
649 wpa_printf(MSG_ERROR, "Could not add HS 2.0 AP "
650 "version");
651 goto fail;
652 }
653
654 if (sta->hs20_ie && wpabuf_len(sta->hs20_ie) > 0) {
655 const u8 *pos;
656 u8 buf[3];
657 u16 id;
658 pos = wpabuf_head_u8(sta->hs20_ie);
659 buf[0] = (*pos) >> 4;
660 if (((*pos) & HS20_PPS_MO_ID_PRESENT) &&
661 wpabuf_len(sta->hs20_ie) >= 3)
662 id = WPA_GET_LE16(pos + 1);
663 else
664 id = 0;
665 WPA_PUT_BE16(buf + 1, id);
666 if (!radius_msg_add_wfa(
667 msg,
668 RADIUS_VENDOR_ATTR_WFA_HS20_STA_VERSION,
669 buf, sizeof(buf))) {
670 wpa_printf(MSG_ERROR, "Could not add HS 2.0 "
671 "STA version");
672 goto fail;
673 }
674 }
675 }
676 #endif /* CONFIG_HS20 */
677
678 if (radius_client_send(hapd->radius, msg, RADIUS_AUTH, sta->addr) < 0)
679 goto fail;
680
681 return;
682
683 fail:
684 radius_msg_free(msg);
685 }
686 #endif /* CONFIG_NO_RADIUS */
687
688
handle_eap_response(struct hostapd_data * hapd,struct sta_info * sta,struct eap_hdr * eap,size_t len)689 static void handle_eap_response(struct hostapd_data *hapd,
690 struct sta_info *sta, struct eap_hdr *eap,
691 size_t len)
692 {
693 u8 type, *data;
694 struct eapol_state_machine *sm = sta->eapol_sm;
695 if (sm == NULL)
696 return;
697
698 data = (u8 *) (eap + 1);
699
700 if (len < sizeof(*eap) + 1) {
701 wpa_printf(MSG_INFO, "handle_eap_response: too short response data");
702 return;
703 }
704
705 sm->eap_type_supp = type = data[0];
706
707 hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
708 HOSTAPD_LEVEL_DEBUG, "received EAP packet (code=%d "
709 "id=%d len=%d) from STA: EAP Response-%s (%d)",
710 eap->code, eap->identifier, be_to_host16(eap->length),
711 eap_server_get_name(0, type), type);
712
713 sm->dot1xAuthEapolRespFramesRx++;
714
715 wpabuf_free(sm->eap_if->eapRespData);
716 sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len);
717 sm->eapolEap = TRUE;
718 }
719
720
handle_eap_initiate(struct hostapd_data * hapd,struct sta_info * sta,struct eap_hdr * eap,size_t len)721 static void handle_eap_initiate(struct hostapd_data *hapd,
722 struct sta_info *sta, struct eap_hdr *eap,
723 size_t len)
724 {
725 #ifdef CONFIG_ERP
726 u8 type, *data;
727 struct eapol_state_machine *sm = sta->eapol_sm;
728
729 if (sm == NULL)
730 return;
731
732 if (len < sizeof(*eap) + 1) {
733 wpa_printf(MSG_INFO,
734 "handle_eap_initiate: too short response data");
735 return;
736 }
737
738 data = (u8 *) (eap + 1);
739 type = data[0];
740
741 hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
742 HOSTAPD_LEVEL_DEBUG, "received EAP packet (code=%d "
743 "id=%d len=%d) from STA: EAP Initiate type %u",
744 eap->code, eap->identifier, be_to_host16(eap->length),
745 type);
746
747 wpabuf_free(sm->eap_if->eapRespData);
748 sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len);
749 sm->eapolEap = TRUE;
750 #endif /* CONFIG_ERP */
751 }
752
753
754 /* Process incoming EAP packet from Supplicant */
handle_eap(struct hostapd_data * hapd,struct sta_info * sta,u8 * buf,size_t len)755 static void handle_eap(struct hostapd_data *hapd, struct sta_info *sta,
756 u8 *buf, size_t len)
757 {
758 struct eap_hdr *eap;
759 u16 eap_len;
760
761 if (len < sizeof(*eap)) {
762 wpa_printf(MSG_INFO, " too short EAP packet");
763 return;
764 }
765
766 eap = (struct eap_hdr *) buf;
767
768 eap_len = be_to_host16(eap->length);
769 wpa_printf(MSG_DEBUG, "EAP: code=%d identifier=%d length=%d",
770 eap->code, eap->identifier, eap_len);
771 if (eap_len < sizeof(*eap)) {
772 wpa_printf(MSG_DEBUG, " Invalid EAP length");
773 return;
774 } else if (eap_len > len) {
775 wpa_printf(MSG_DEBUG, " Too short frame to contain this EAP "
776 "packet");
777 return;
778 } else if (eap_len < len) {
779 wpa_printf(MSG_DEBUG, " Ignoring %lu extra bytes after EAP "
780 "packet", (unsigned long) len - eap_len);
781 }
782
783 switch (eap->code) {
784 case EAP_CODE_REQUEST:
785 wpa_printf(MSG_DEBUG, " (request)");
786 return;
787 case EAP_CODE_RESPONSE:
788 wpa_printf(MSG_DEBUG, " (response)");
789 handle_eap_response(hapd, sta, eap, eap_len);
790 break;
791 case EAP_CODE_SUCCESS:
792 wpa_printf(MSG_DEBUG, " (success)");
793 return;
794 case EAP_CODE_FAILURE:
795 wpa_printf(MSG_DEBUG, " (failure)");
796 return;
797 case EAP_CODE_INITIATE:
798 wpa_printf(MSG_DEBUG, " (initiate)");
799 handle_eap_initiate(hapd, sta, eap, eap_len);
800 break;
801 case EAP_CODE_FINISH:
802 wpa_printf(MSG_DEBUG, " (finish)");
803 break;
804 default:
805 wpa_printf(MSG_DEBUG, " (unknown code)");
806 return;
807 }
808 }
809
810
811 static struct eapol_state_machine *
ieee802_1x_alloc_eapol_sm(struct hostapd_data * hapd,struct sta_info * sta)812 ieee802_1x_alloc_eapol_sm(struct hostapd_data *hapd, struct sta_info *sta)
813 {
814 int flags = 0;
815 if (sta->flags & WLAN_STA_PREAUTH)
816 flags |= EAPOL_SM_PREAUTH;
817 if (sta->wpa_sm) {
818 flags |= EAPOL_SM_USES_WPA;
819 if (wpa_auth_sta_get_pmksa(sta->wpa_sm))
820 flags |= EAPOL_SM_FROM_PMKSA_CACHE;
821 }
822 return eapol_auth_alloc(hapd->eapol_auth, sta->addr, flags,
823 sta->wps_ie, sta->p2p_ie, sta,
824 sta->identity, sta->radius_cui);
825 }
826
827
828 /**
829 * ieee802_1x_receive - Process the EAPOL frames from the Supplicant
830 * @hapd: hostapd BSS data
831 * @sa: Source address (sender of the EAPOL frame)
832 * @buf: EAPOL frame
833 * @len: Length of buf in octets
834 *
835 * This function is called for each incoming EAPOL frame from the interface
836 */
ieee802_1x_receive(struct hostapd_data * hapd,const u8 * sa,const u8 * buf,size_t len)837 void ieee802_1x_receive(struct hostapd_data *hapd, const u8 *sa, const u8 *buf,
838 size_t len)
839 {
840 struct sta_info *sta;
841 struct ieee802_1x_hdr *hdr;
842 struct ieee802_1x_eapol_key *key;
843 u16 datalen;
844 struct rsn_pmksa_cache_entry *pmksa;
845 int key_mgmt;
846
847 if (!hapd->conf->ieee802_1x && !hapd->conf->wpa && !hapd->conf->osen &&
848 !hapd->conf->wps_state)
849 return;
850
851 wpa_printf(MSG_DEBUG, "IEEE 802.1X: %lu bytes from " MACSTR,
852 (unsigned long) len, MAC2STR(sa));
853 sta = ap_get_sta(hapd, sa);
854 if (!sta || (!(sta->flags & (WLAN_STA_ASSOC | WLAN_STA_PREAUTH)) &&
855 !(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_WIRED))) {
856 wpa_printf(MSG_DEBUG, "IEEE 802.1X data frame from not "
857 "associated/Pre-authenticating STA");
858 return;
859 }
860
861 if (len < sizeof(*hdr)) {
862 wpa_printf(MSG_INFO, " too short IEEE 802.1X packet");
863 return;
864 }
865
866 hdr = (struct ieee802_1x_hdr *) buf;
867 datalen = be_to_host16(hdr->length);
868 wpa_printf(MSG_DEBUG, " IEEE 802.1X: version=%d type=%d length=%d",
869 hdr->version, hdr->type, datalen);
870
871 if (len - sizeof(*hdr) < datalen) {
872 wpa_printf(MSG_INFO, " frame too short for this IEEE 802.1X packet");
873 if (sta->eapol_sm)
874 sta->eapol_sm->dot1xAuthEapLengthErrorFramesRx++;
875 return;
876 }
877 if (len - sizeof(*hdr) > datalen) {
878 wpa_printf(MSG_DEBUG, " ignoring %lu extra octets after "
879 "IEEE 802.1X packet",
880 (unsigned long) len - sizeof(*hdr) - datalen);
881 }
882
883 if (sta->eapol_sm) {
884 sta->eapol_sm->dot1xAuthLastEapolFrameVersion = hdr->version;
885 sta->eapol_sm->dot1xAuthEapolFramesRx++;
886 }
887
888 key = (struct ieee802_1x_eapol_key *) (hdr + 1);
889 if (datalen >= sizeof(struct ieee802_1x_eapol_key) &&
890 hdr->type == IEEE802_1X_TYPE_EAPOL_KEY &&
891 (key->type == EAPOL_KEY_TYPE_WPA ||
892 key->type == EAPOL_KEY_TYPE_RSN)) {
893 wpa_receive(hapd->wpa_auth, sta->wpa_sm, (u8 *) hdr,
894 sizeof(*hdr) + datalen);
895 return;
896 }
897
898 if (!hapd->conf->ieee802_1x && !hapd->conf->osen &&
899 !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) {
900 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore EAPOL message - "
901 "802.1X not enabled and WPS not used");
902 return;
903 }
904
905 key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm);
906 if (key_mgmt != -1 && wpa_key_mgmt_wpa_psk(key_mgmt)) {
907 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore EAPOL message - "
908 "STA is using PSK");
909 return;
910 }
911
912 if (!sta->eapol_sm) {
913 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
914 if (!sta->eapol_sm)
915 return;
916
917 #ifdef CONFIG_WPS
918 if (!hapd->conf->ieee802_1x && hapd->conf->wps_state) {
919 u32 wflags = sta->flags & (WLAN_STA_WPS |
920 WLAN_STA_WPS2 |
921 WLAN_STA_MAYBE_WPS);
922 if (wflags == WLAN_STA_MAYBE_WPS ||
923 wflags == (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) {
924 /*
925 * Delay EAPOL frame transmission until a
926 * possible WPS STA initiates the handshake
927 * with EAPOL-Start. Only allow the wait to be
928 * skipped if the STA is known to support WPS
929 * 2.0.
930 */
931 wpa_printf(MSG_DEBUG, "WPS: Do not start "
932 "EAPOL until EAPOL-Start is "
933 "received");
934 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
935 }
936 }
937 #endif /* CONFIG_WPS */
938
939 sta->eapol_sm->eap_if->portEnabled = TRUE;
940 }
941
942 /* since we support version 1, we can ignore version field and proceed
943 * as specified in version 1 standard [IEEE Std 802.1X-2001, 7.5.5] */
944 /* TODO: actually, we are not version 1 anymore.. However, Version 2
945 * does not change frame contents, so should be ok to process frames
946 * more or less identically. Some changes might be needed for
947 * verification of fields. */
948
949 switch (hdr->type) {
950 case IEEE802_1X_TYPE_EAP_PACKET:
951 handle_eap(hapd, sta, (u8 *) (hdr + 1), datalen);
952 break;
953
954 case IEEE802_1X_TYPE_EAPOL_START:
955 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
956 HOSTAPD_LEVEL_DEBUG, "received EAPOL-Start "
957 "from STA");
958 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
959 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
960 if (pmksa) {
961 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
962 HOSTAPD_LEVEL_DEBUG, "cached PMKSA "
963 "available - ignore it since "
964 "STA sent EAPOL-Start");
965 wpa_auth_sta_clear_pmksa(sta->wpa_sm, pmksa);
966 }
967 sta->eapol_sm->eapolStart = TRUE;
968 sta->eapol_sm->dot1xAuthEapolStartFramesRx++;
969 eap_server_clear_identity(sta->eapol_sm->eap);
970 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
971 break;
972
973 case IEEE802_1X_TYPE_EAPOL_LOGOFF:
974 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
975 HOSTAPD_LEVEL_DEBUG, "received EAPOL-Logoff "
976 "from STA");
977 sta->acct_terminate_cause =
978 RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
979 accounting_sta_stop(hapd, sta);
980 sta->eapol_sm->eapolLogoff = TRUE;
981 sta->eapol_sm->dot1xAuthEapolLogoffFramesRx++;
982 eap_server_clear_identity(sta->eapol_sm->eap);
983 break;
984
985 case IEEE802_1X_TYPE_EAPOL_KEY:
986 wpa_printf(MSG_DEBUG, " EAPOL-Key");
987 if (!ap_sta_is_authorized(sta)) {
988 wpa_printf(MSG_DEBUG, " Dropped key data from "
989 "unauthorized Supplicant");
990 break;
991 }
992 break;
993
994 case IEEE802_1X_TYPE_EAPOL_ENCAPSULATED_ASF_ALERT:
995 wpa_printf(MSG_DEBUG, " EAPOL-Encapsulated-ASF-Alert");
996 /* TODO: implement support for this; show data */
997 break;
998
999 default:
1000 wpa_printf(MSG_DEBUG, " unknown IEEE 802.1X packet type");
1001 sta->eapol_sm->dot1xAuthInvalidEapolFramesRx++;
1002 break;
1003 }
1004
1005 eapol_auth_step(sta->eapol_sm);
1006 }
1007
1008
1009 /**
1010 * ieee802_1x_new_station - Start IEEE 802.1X authentication
1011 * @hapd: hostapd BSS data
1012 * @sta: The station
1013 *
1014 * This function is called to start IEEE 802.1X authentication when a new
1015 * station completes IEEE 802.11 association.
1016 */
ieee802_1x_new_station(struct hostapd_data * hapd,struct sta_info * sta)1017 void ieee802_1x_new_station(struct hostapd_data *hapd, struct sta_info *sta)
1018 {
1019 struct rsn_pmksa_cache_entry *pmksa;
1020 int reassoc = 1;
1021 int force_1x = 0;
1022 int key_mgmt;
1023
1024 #ifdef CONFIG_WPS
1025 if (hapd->conf->wps_state &&
1026 ((hapd->conf->wpa && (sta->flags & WLAN_STA_MAYBE_WPS)) ||
1027 (sta->flags & WLAN_STA_WPS))) {
1028 /*
1029 * Need to enable IEEE 802.1X/EAPOL state machines for possible
1030 * WPS handshake even if IEEE 802.1X/EAPOL is not used for
1031 * authentication in this BSS.
1032 */
1033 force_1x = 1;
1034 }
1035 #endif /* CONFIG_WPS */
1036
1037 if (!force_1x && !hapd->conf->ieee802_1x && !hapd->conf->osen) {
1038 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - "
1039 "802.1X not enabled or forced for WPS");
1040 /*
1041 * Clear any possible EAPOL authenticator state to support
1042 * reassociation change from WPS to PSK.
1043 */
1044 ieee802_1x_free_station(sta);
1045 return;
1046 }
1047
1048 key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm);
1049 if (key_mgmt != -1 && wpa_key_mgmt_wpa_psk(key_mgmt)) {
1050 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - using PSK");
1051 /*
1052 * Clear any possible EAPOL authenticator state to support
1053 * reassociation change from WPA-EAP to PSK.
1054 */
1055 ieee802_1x_free_station(sta);
1056 return;
1057 }
1058
1059 if (sta->eapol_sm == NULL) {
1060 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1061 HOSTAPD_LEVEL_DEBUG, "start authentication");
1062 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
1063 if (sta->eapol_sm == NULL) {
1064 hostapd_logger(hapd, sta->addr,
1065 HOSTAPD_MODULE_IEEE8021X,
1066 HOSTAPD_LEVEL_INFO,
1067 "failed to allocate state machine");
1068 return;
1069 }
1070 reassoc = 0;
1071 }
1072
1073 #ifdef CONFIG_WPS
1074 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
1075 if (!hapd->conf->ieee802_1x && hapd->conf->wps_state &&
1076 !(sta->flags & WLAN_STA_WPS2)) {
1077 /*
1078 * Delay EAPOL frame transmission until a possible WPS STA
1079 * initiates the handshake with EAPOL-Start. Only allow the
1080 * wait to be skipped if the STA is known to support WPS 2.0.
1081 */
1082 wpa_printf(MSG_DEBUG, "WPS: Do not start EAPOL until "
1083 "EAPOL-Start is received");
1084 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
1085 }
1086 #endif /* CONFIG_WPS */
1087
1088 sta->eapol_sm->eap_if->portEnabled = TRUE;
1089
1090 #ifdef CONFIG_IEEE80211R
1091 if (sta->auth_alg == WLAN_AUTH_FT) {
1092 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1093 HOSTAPD_LEVEL_DEBUG,
1094 "PMK from FT - skip IEEE 802.1X/EAP");
1095 /* Setup EAPOL state machines to already authenticated state
1096 * because of existing FT information from R0KH. */
1097 sta->eapol_sm->keyRun = TRUE;
1098 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
1099 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
1100 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
1101 sta->eapol_sm->authSuccess = TRUE;
1102 sta->eapol_sm->authFail = FALSE;
1103 if (sta->eapol_sm->eap)
1104 eap_sm_notify_cached(sta->eapol_sm->eap);
1105 /* TODO: get vlan_id from R0KH using RRB message */
1106 return;
1107 }
1108 #endif /* CONFIG_IEEE80211R */
1109
1110 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
1111 if (pmksa) {
1112 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1113 HOSTAPD_LEVEL_DEBUG,
1114 "PMK from PMKSA cache - skip IEEE 802.1X/EAP");
1115 /* Setup EAPOL state machines to already authenticated state
1116 * because of existing PMKSA information in the cache. */
1117 sta->eapol_sm->keyRun = TRUE;
1118 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
1119 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
1120 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
1121 sta->eapol_sm->authSuccess = TRUE;
1122 sta->eapol_sm->authFail = FALSE;
1123 if (sta->eapol_sm->eap)
1124 eap_sm_notify_cached(sta->eapol_sm->eap);
1125 pmksa_cache_to_eapol_data(pmksa, sta->eapol_sm);
1126 ap_sta_bind_vlan(hapd, sta);
1127 } else {
1128 if (reassoc) {
1129 /*
1130 * Force EAPOL state machines to start
1131 * re-authentication without having to wait for the
1132 * Supplicant to send EAPOL-Start.
1133 */
1134 sta->eapol_sm->reAuthenticate = TRUE;
1135 }
1136 eapol_auth_step(sta->eapol_sm);
1137 }
1138 }
1139
1140
ieee802_1x_free_station(struct sta_info * sta)1141 void ieee802_1x_free_station(struct sta_info *sta)
1142 {
1143 struct eapol_state_machine *sm = sta->eapol_sm;
1144
1145 if (sm == NULL)
1146 return;
1147
1148 sta->eapol_sm = NULL;
1149
1150 #ifndef CONFIG_NO_RADIUS
1151 radius_msg_free(sm->last_recv_radius);
1152 radius_free_class(&sm->radius_class);
1153 wpabuf_free(sm->radius_cui);
1154 #endif /* CONFIG_NO_RADIUS */
1155
1156 os_free(sm->identity);
1157 eapol_auth_free(sm);
1158 }
1159
1160
1161 #ifndef CONFIG_NO_RADIUS
ieee802_1x_decapsulate_radius(struct hostapd_data * hapd,struct sta_info * sta)1162 static void ieee802_1x_decapsulate_radius(struct hostapd_data *hapd,
1163 struct sta_info *sta)
1164 {
1165 struct wpabuf *eap;
1166 const struct eap_hdr *hdr;
1167 int eap_type = -1;
1168 char buf[64];
1169 struct radius_msg *msg;
1170 struct eapol_state_machine *sm = sta->eapol_sm;
1171
1172 if (sm == NULL || sm->last_recv_radius == NULL) {
1173 if (sm)
1174 sm->eap_if->aaaEapNoReq = TRUE;
1175 return;
1176 }
1177
1178 msg = sm->last_recv_radius;
1179
1180 eap = radius_msg_get_eap(msg);
1181 if (eap == NULL) {
1182 /* RFC 3579, Chap. 2.6.3:
1183 * RADIUS server SHOULD NOT send Access-Reject/no EAP-Message
1184 * attribute */
1185 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1186 HOSTAPD_LEVEL_WARNING, "could not extract "
1187 "EAP-Message from RADIUS message");
1188 sm->eap_if->aaaEapNoReq = TRUE;
1189 return;
1190 }
1191
1192 if (wpabuf_len(eap) < sizeof(*hdr)) {
1193 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1194 HOSTAPD_LEVEL_WARNING, "too short EAP packet "
1195 "received from authentication server");
1196 wpabuf_free(eap);
1197 sm->eap_if->aaaEapNoReq = TRUE;
1198 return;
1199 }
1200
1201 if (wpabuf_len(eap) > sizeof(*hdr))
1202 eap_type = (wpabuf_head_u8(eap))[sizeof(*hdr)];
1203
1204 hdr = wpabuf_head(eap);
1205 switch (hdr->code) {
1206 case EAP_CODE_REQUEST:
1207 if (eap_type >= 0)
1208 sm->eap_type_authsrv = eap_type;
1209 os_snprintf(buf, sizeof(buf), "EAP-Request-%s (%d)",
1210 eap_server_get_name(0, eap_type), eap_type);
1211 break;
1212 case EAP_CODE_RESPONSE:
1213 os_snprintf(buf, sizeof(buf), "EAP Response-%s (%d)",
1214 eap_server_get_name(0, eap_type), eap_type);
1215 break;
1216 case EAP_CODE_SUCCESS:
1217 os_strlcpy(buf, "EAP Success", sizeof(buf));
1218 break;
1219 case EAP_CODE_FAILURE:
1220 os_strlcpy(buf, "EAP Failure", sizeof(buf));
1221 break;
1222 default:
1223 os_strlcpy(buf, "unknown EAP code", sizeof(buf));
1224 break;
1225 }
1226 buf[sizeof(buf) - 1] = '\0';
1227 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1228 HOSTAPD_LEVEL_DEBUG, "decapsulated EAP packet (code=%d "
1229 "id=%d len=%d) from RADIUS server: %s",
1230 hdr->code, hdr->identifier, be_to_host16(hdr->length),
1231 buf);
1232 sm->eap_if->aaaEapReq = TRUE;
1233
1234 wpabuf_free(sm->eap_if->aaaEapReqData);
1235 sm->eap_if->aaaEapReqData = eap;
1236 }
1237
1238
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)1239 static void ieee802_1x_get_keys(struct hostapd_data *hapd,
1240 struct sta_info *sta, struct radius_msg *msg,
1241 struct radius_msg *req,
1242 const u8 *shared_secret,
1243 size_t shared_secret_len)
1244 {
1245 struct radius_ms_mppe_keys *keys;
1246 struct eapol_state_machine *sm = sta->eapol_sm;
1247 if (sm == NULL)
1248 return;
1249
1250 keys = radius_msg_get_ms_keys(msg, req, shared_secret,
1251 shared_secret_len);
1252
1253 if (keys && keys->send && keys->recv) {
1254 size_t len = keys->send_len + keys->recv_len;
1255 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Send-Key",
1256 keys->send, keys->send_len);
1257 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Recv-Key",
1258 keys->recv, keys->recv_len);
1259
1260 os_free(sm->eap_if->aaaEapKeyData);
1261 sm->eap_if->aaaEapKeyData = os_malloc(len);
1262 if (sm->eap_if->aaaEapKeyData) {
1263 os_memcpy(sm->eap_if->aaaEapKeyData, keys->recv,
1264 keys->recv_len);
1265 os_memcpy(sm->eap_if->aaaEapKeyData + keys->recv_len,
1266 keys->send, keys->send_len);
1267 sm->eap_if->aaaEapKeyDataLen = len;
1268 sm->eap_if->aaaEapKeyAvailable = TRUE;
1269 }
1270 } else {
1271 wpa_printf(MSG_DEBUG,
1272 "MS-MPPE: 1x_get_keys, could not get keys: %p send: %p recv: %p",
1273 keys, keys ? keys->send : NULL,
1274 keys ? keys->recv : NULL);
1275 }
1276
1277 if (keys) {
1278 os_free(keys->send);
1279 os_free(keys->recv);
1280 os_free(keys);
1281 }
1282 }
1283
1284
ieee802_1x_store_radius_class(struct hostapd_data * hapd,struct sta_info * sta,struct radius_msg * msg)1285 static void ieee802_1x_store_radius_class(struct hostapd_data *hapd,
1286 struct sta_info *sta,
1287 struct radius_msg *msg)
1288 {
1289 u8 *attr_class;
1290 size_t class_len;
1291 struct eapol_state_machine *sm = sta->eapol_sm;
1292 int count, i;
1293 struct radius_attr_data *nclass;
1294 size_t nclass_count;
1295
1296 if (!hapd->conf->radius->acct_server || hapd->radius == NULL ||
1297 sm == NULL)
1298 return;
1299
1300 radius_free_class(&sm->radius_class);
1301 count = radius_msg_count_attr(msg, RADIUS_ATTR_CLASS, 1);
1302 if (count <= 0)
1303 return;
1304
1305 nclass = os_calloc(count, sizeof(struct radius_attr_data));
1306 if (nclass == NULL)
1307 return;
1308
1309 nclass_count = 0;
1310
1311 attr_class = NULL;
1312 for (i = 0; i < count; i++) {
1313 do {
1314 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CLASS,
1315 &attr_class, &class_len,
1316 attr_class) < 0) {
1317 i = count;
1318 break;
1319 }
1320 } while (class_len < 1);
1321
1322 nclass[nclass_count].data = os_malloc(class_len);
1323 if (nclass[nclass_count].data == NULL)
1324 break;
1325
1326 os_memcpy(nclass[nclass_count].data, attr_class, class_len);
1327 nclass[nclass_count].len = class_len;
1328 nclass_count++;
1329 }
1330
1331 sm->radius_class.attr = nclass;
1332 sm->radius_class.count = nclass_count;
1333 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Stored %lu RADIUS Class "
1334 "attributes for " MACSTR,
1335 (unsigned long) sm->radius_class.count,
1336 MAC2STR(sta->addr));
1337 }
1338
1339
1340 /* 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)1341 static void ieee802_1x_update_sta_identity(struct hostapd_data *hapd,
1342 struct sta_info *sta,
1343 struct radius_msg *msg)
1344 {
1345 u8 *buf, *identity;
1346 size_t len;
1347 struct eapol_state_machine *sm = sta->eapol_sm;
1348
1349 if (sm == NULL)
1350 return;
1351
1352 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_USER_NAME, &buf, &len,
1353 NULL) < 0)
1354 return;
1355
1356 identity = (u8 *) dup_binstr(buf, len);
1357 if (identity == NULL)
1358 return;
1359
1360 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1361 HOSTAPD_LEVEL_DEBUG, "old identity '%s' updated with "
1362 "User-Name from Access-Accept '%s'",
1363 sm->identity ? (char *) sm->identity : "N/A",
1364 (char *) identity);
1365
1366 os_free(sm->identity);
1367 sm->identity = identity;
1368 sm->identity_len = len;
1369 }
1370
1371
1372 /* 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)1373 static void ieee802_1x_update_sta_cui(struct hostapd_data *hapd,
1374 struct sta_info *sta,
1375 struct radius_msg *msg)
1376 {
1377 struct eapol_state_machine *sm = sta->eapol_sm;
1378 struct wpabuf *cui;
1379 u8 *buf;
1380 size_t len;
1381
1382 if (sm == NULL)
1383 return;
1384
1385 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CHARGEABLE_USER_IDENTITY,
1386 &buf, &len, NULL) < 0)
1387 return;
1388
1389 cui = wpabuf_alloc_copy(buf, len);
1390 if (cui == NULL)
1391 return;
1392
1393 wpabuf_free(sm->radius_cui);
1394 sm->radius_cui = cui;
1395 }
1396
1397
1398 #ifdef CONFIG_HS20
1399
ieee802_1x_hs20_sub_rem(struct sta_info * sta,u8 * pos,size_t len)1400 static void ieee802_1x_hs20_sub_rem(struct sta_info *sta, u8 *pos, size_t len)
1401 {
1402 sta->remediation = 1;
1403 os_free(sta->remediation_url);
1404 if (len > 2) {
1405 sta->remediation_url = os_malloc(len);
1406 if (!sta->remediation_url)
1407 return;
1408 sta->remediation_method = pos[0];
1409 os_memcpy(sta->remediation_url, pos + 1, len - 1);
1410 sta->remediation_url[len - 1] = '\0';
1411 wpa_printf(MSG_DEBUG, "HS 2.0: Subscription remediation needed "
1412 "for " MACSTR " - server method %u URL %s",
1413 MAC2STR(sta->addr), sta->remediation_method,
1414 sta->remediation_url);
1415 } else {
1416 sta->remediation_url = NULL;
1417 wpa_printf(MSG_DEBUG, "HS 2.0: Subscription remediation needed "
1418 "for " MACSTR, MAC2STR(sta->addr));
1419 }
1420 /* TODO: assign the STA into remediation VLAN or add filtering */
1421 }
1422
1423
ieee802_1x_hs20_deauth_req(struct hostapd_data * hapd,struct sta_info * sta,u8 * pos,size_t len)1424 static void ieee802_1x_hs20_deauth_req(struct hostapd_data *hapd,
1425 struct sta_info *sta, u8 *pos,
1426 size_t len)
1427 {
1428 if (len < 3)
1429 return; /* Malformed information */
1430 sta->hs20_deauth_requested = 1;
1431 wpa_printf(MSG_DEBUG, "HS 2.0: Deauthentication request - Code %u "
1432 "Re-auth Delay %u",
1433 *pos, WPA_GET_LE16(pos + 1));
1434 wpabuf_free(sta->hs20_deauth_req);
1435 sta->hs20_deauth_req = wpabuf_alloc(len + 1);
1436 if (sta->hs20_deauth_req) {
1437 wpabuf_put_data(sta->hs20_deauth_req, pos, 3);
1438 wpabuf_put_u8(sta->hs20_deauth_req, len - 3);
1439 wpabuf_put_data(sta->hs20_deauth_req, pos + 3, len - 3);
1440 }
1441 ap_sta_session_timeout(hapd, sta, hapd->conf->hs20_deauth_req_timeout);
1442 }
1443
1444
ieee802_1x_hs20_session_info(struct hostapd_data * hapd,struct sta_info * sta,u8 * pos,size_t len,int session_timeout)1445 static void ieee802_1x_hs20_session_info(struct hostapd_data *hapd,
1446 struct sta_info *sta, u8 *pos,
1447 size_t len, int session_timeout)
1448 {
1449 unsigned int swt;
1450 int warning_time, beacon_int;
1451
1452 if (len < 1)
1453 return; /* Malformed information */
1454 os_free(sta->hs20_session_info_url);
1455 sta->hs20_session_info_url = os_malloc(len);
1456 if (sta->hs20_session_info_url == NULL)
1457 return;
1458 swt = pos[0];
1459 os_memcpy(sta->hs20_session_info_url, pos + 1, len - 1);
1460 sta->hs20_session_info_url[len - 1] = '\0';
1461 wpa_printf(MSG_DEBUG, "HS 2.0: Session Information URL='%s' SWT=%u "
1462 "(session_timeout=%d)",
1463 sta->hs20_session_info_url, swt, session_timeout);
1464 if (session_timeout < 0) {
1465 wpa_printf(MSG_DEBUG, "HS 2.0: No Session-Timeout set - ignore session info URL");
1466 return;
1467 }
1468 if (swt == 255)
1469 swt = 1; /* Use one minute as the AP selected value */
1470
1471 if ((unsigned int) session_timeout < swt * 60)
1472 warning_time = 0;
1473 else
1474 warning_time = session_timeout - swt * 60;
1475
1476 beacon_int = hapd->iconf->beacon_int;
1477 if (beacon_int < 1)
1478 beacon_int = 100; /* best guess */
1479 sta->hs20_disassoc_timer = swt * 60 * 1000 / beacon_int * 125 / 128;
1480 if (sta->hs20_disassoc_timer > 65535)
1481 sta->hs20_disassoc_timer = 65535;
1482
1483 ap_sta_session_warning_timeout(hapd, sta, warning_time);
1484 }
1485
1486 #endif /* CONFIG_HS20 */
1487
1488
ieee802_1x_check_hs20(struct hostapd_data * hapd,struct sta_info * sta,struct radius_msg * msg,int session_timeout)1489 static void ieee802_1x_check_hs20(struct hostapd_data *hapd,
1490 struct sta_info *sta,
1491 struct radius_msg *msg,
1492 int session_timeout)
1493 {
1494 #ifdef CONFIG_HS20
1495 u8 *buf, *pos, *end, type, sublen;
1496 size_t len;
1497
1498 buf = NULL;
1499 sta->remediation = 0;
1500 sta->hs20_deauth_requested = 0;
1501
1502 for (;;) {
1503 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_VENDOR_SPECIFIC,
1504 &buf, &len, buf) < 0)
1505 break;
1506 if (len < 6)
1507 continue;
1508 pos = buf;
1509 end = buf + len;
1510 if (WPA_GET_BE32(pos) != RADIUS_VENDOR_ID_WFA)
1511 continue;
1512 pos += 4;
1513
1514 type = *pos++;
1515 sublen = *pos++;
1516 if (sublen < 2)
1517 continue; /* invalid length */
1518 sublen -= 2; /* skip header */
1519 if (pos + sublen > end)
1520 continue; /* invalid WFA VSA */
1521
1522 switch (type) {
1523 case RADIUS_VENDOR_ATTR_WFA_HS20_SUBSCR_REMEDIATION:
1524 ieee802_1x_hs20_sub_rem(sta, pos, sublen);
1525 break;
1526 case RADIUS_VENDOR_ATTR_WFA_HS20_DEAUTH_REQ:
1527 ieee802_1x_hs20_deauth_req(hapd, sta, pos, sublen);
1528 break;
1529 case RADIUS_VENDOR_ATTR_WFA_HS20_SESSION_INFO_URL:
1530 ieee802_1x_hs20_session_info(hapd, sta, pos, sublen,
1531 session_timeout);
1532 break;
1533 }
1534 }
1535 #endif /* CONFIG_HS20 */
1536 }
1537
1538
1539 struct sta_id_search {
1540 u8 identifier;
1541 struct eapol_state_machine *sm;
1542 };
1543
1544
ieee802_1x_select_radius_identifier(struct hostapd_data * hapd,struct sta_info * sta,void * ctx)1545 static int ieee802_1x_select_radius_identifier(struct hostapd_data *hapd,
1546 struct sta_info *sta,
1547 void *ctx)
1548 {
1549 struct sta_id_search *id_search = ctx;
1550 struct eapol_state_machine *sm = sta->eapol_sm;
1551
1552 if (sm && sm->radius_identifier >= 0 &&
1553 sm->radius_identifier == id_search->identifier) {
1554 id_search->sm = sm;
1555 return 1;
1556 }
1557 return 0;
1558 }
1559
1560
1561 static struct eapol_state_machine *
ieee802_1x_search_radius_identifier(struct hostapd_data * hapd,u8 identifier)1562 ieee802_1x_search_radius_identifier(struct hostapd_data *hapd, u8 identifier)
1563 {
1564 struct sta_id_search id_search;
1565 id_search.identifier = identifier;
1566 id_search.sm = NULL;
1567 ap_for_each_sta(hapd, ieee802_1x_select_radius_identifier, &id_search);
1568 return id_search.sm;
1569 }
1570
1571
1572 /**
1573 * ieee802_1x_receive_auth - Process RADIUS frames from Authentication Server
1574 * @msg: RADIUS response message
1575 * @req: RADIUS request message
1576 * @shared_secret: RADIUS shared secret
1577 * @shared_secret_len: Length of shared_secret in octets
1578 * @data: Context data (struct hostapd_data *)
1579 * Returns: Processing status
1580 */
1581 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)1582 ieee802_1x_receive_auth(struct radius_msg *msg, struct radius_msg *req,
1583 const u8 *shared_secret, size_t shared_secret_len,
1584 void *data)
1585 {
1586 struct hostapd_data *hapd = data;
1587 struct sta_info *sta;
1588 u32 session_timeout = 0, termination_action, acct_interim_interval;
1589 int session_timeout_set, vlan_id = 0;
1590 struct eapol_state_machine *sm;
1591 int override_eapReq = 0;
1592 struct radius_hdr *hdr = radius_msg_get_hdr(msg);
1593
1594 sm = ieee802_1x_search_radius_identifier(hapd, hdr->identifier);
1595 if (sm == NULL) {
1596 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Could not find matching "
1597 "station for this RADIUS message");
1598 return RADIUS_RX_UNKNOWN;
1599 }
1600 sta = sm->sta;
1601
1602 /* RFC 2869, Ch. 5.13: valid Message-Authenticator attribute MUST be
1603 * present when packet contains an EAP-Message attribute */
1604 if (hdr->code == RADIUS_CODE_ACCESS_REJECT &&
1605 radius_msg_get_attr(msg, RADIUS_ATTR_MESSAGE_AUTHENTICATOR, NULL,
1606 0) < 0 &&
1607 radius_msg_get_attr(msg, RADIUS_ATTR_EAP_MESSAGE, NULL, 0) < 0) {
1608 wpa_printf(MSG_DEBUG, "Allowing RADIUS Access-Reject without "
1609 "Message-Authenticator since it does not include "
1610 "EAP-Message");
1611 } else if (radius_msg_verify(msg, shared_secret, shared_secret_len,
1612 req, 1)) {
1613 wpa_printf(MSG_INFO, "Incoming RADIUS packet did not have correct Message-Authenticator - dropped");
1614 return RADIUS_RX_INVALID_AUTHENTICATOR;
1615 }
1616
1617 if (hdr->code != RADIUS_CODE_ACCESS_ACCEPT &&
1618 hdr->code != RADIUS_CODE_ACCESS_REJECT &&
1619 hdr->code != RADIUS_CODE_ACCESS_CHALLENGE) {
1620 wpa_printf(MSG_INFO, "Unknown RADIUS message code");
1621 return RADIUS_RX_UNKNOWN;
1622 }
1623
1624 sm->radius_identifier = -1;
1625 wpa_printf(MSG_DEBUG, "RADIUS packet matching with station " MACSTR,
1626 MAC2STR(sta->addr));
1627
1628 radius_msg_free(sm->last_recv_radius);
1629 sm->last_recv_radius = msg;
1630
1631 session_timeout_set =
1632 !radius_msg_get_attr_int32(msg, RADIUS_ATTR_SESSION_TIMEOUT,
1633 &session_timeout);
1634 if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_TERMINATION_ACTION,
1635 &termination_action))
1636 termination_action = RADIUS_TERMINATION_ACTION_DEFAULT;
1637
1638 if (hapd->conf->acct_interim_interval == 0 &&
1639 hdr->code == RADIUS_CODE_ACCESS_ACCEPT &&
1640 radius_msg_get_attr_int32(msg, RADIUS_ATTR_ACCT_INTERIM_INTERVAL,
1641 &acct_interim_interval) == 0) {
1642 if (acct_interim_interval < 60) {
1643 hostapd_logger(hapd, sta->addr,
1644 HOSTAPD_MODULE_IEEE8021X,
1645 HOSTAPD_LEVEL_INFO,
1646 "ignored too small "
1647 "Acct-Interim-Interval %d",
1648 acct_interim_interval);
1649 } else
1650 sta->acct_interim_interval = acct_interim_interval;
1651 }
1652
1653
1654 switch (hdr->code) {
1655 case RADIUS_CODE_ACCESS_ACCEPT:
1656 if (hapd->conf->ssid.dynamic_vlan == DYNAMIC_VLAN_DISABLED)
1657 vlan_id = 0;
1658 #ifndef CONFIG_NO_VLAN
1659 else
1660 vlan_id = radius_msg_get_vlanid(msg);
1661 if (vlan_id > 0 &&
1662 hostapd_vlan_id_valid(hapd->conf->vlan, vlan_id)) {
1663 hostapd_logger(hapd, sta->addr,
1664 HOSTAPD_MODULE_RADIUS,
1665 HOSTAPD_LEVEL_INFO,
1666 "VLAN ID %d", vlan_id);
1667 } else if (vlan_id > 0) {
1668 sta->eapol_sm->authFail = TRUE;
1669 hostapd_logger(hapd, sta->addr,
1670 HOSTAPD_MODULE_RADIUS,
1671 HOSTAPD_LEVEL_INFO,
1672 "Invalid VLAN ID %d received from RADIUS server",
1673 vlan_id);
1674 break;
1675 } else if (hapd->conf->ssid.dynamic_vlan ==
1676 DYNAMIC_VLAN_REQUIRED) {
1677 sta->eapol_sm->authFail = TRUE;
1678 hostapd_logger(hapd, sta->addr,
1679 HOSTAPD_MODULE_IEEE8021X,
1680 HOSTAPD_LEVEL_INFO, "authentication "
1681 "server did not include required VLAN "
1682 "ID in Access-Accept");
1683 break;
1684 }
1685 #endif /* CONFIG_NO_VLAN */
1686
1687 sta->vlan_id = vlan_id;
1688 if ((sta->flags & WLAN_STA_ASSOC) &&
1689 ap_sta_bind_vlan(hapd, sta) < 0)
1690 break;
1691
1692 sta->session_timeout_set = !!session_timeout_set;
1693 sta->session_timeout = session_timeout;
1694
1695 /* RFC 3580, Ch. 3.17 */
1696 if (session_timeout_set && termination_action ==
1697 RADIUS_TERMINATION_ACTION_RADIUS_REQUEST) {
1698 sm->reAuthPeriod = session_timeout;
1699 } else if (session_timeout_set)
1700 ap_sta_session_timeout(hapd, sta, session_timeout);
1701
1702 sm->eap_if->aaaSuccess = TRUE;
1703 override_eapReq = 1;
1704 ieee802_1x_get_keys(hapd, sta, msg, req, shared_secret,
1705 shared_secret_len);
1706 ieee802_1x_store_radius_class(hapd, sta, msg);
1707 ieee802_1x_update_sta_identity(hapd, sta, msg);
1708 ieee802_1x_update_sta_cui(hapd, sta, msg);
1709 ieee802_1x_check_hs20(hapd, sta, msg,
1710 session_timeout_set ?
1711 (int) session_timeout : -1);
1712 if (sm->eap_if->eapKeyAvailable && !sta->remediation &&
1713 !sta->hs20_deauth_requested &&
1714 wpa_auth_pmksa_add(sta->wpa_sm, sm->eapol_key_crypt,
1715 session_timeout_set ?
1716 (int) session_timeout : -1, sm) == 0) {
1717 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
1718 HOSTAPD_LEVEL_DEBUG,
1719 "Added PMKSA cache entry");
1720 }
1721 break;
1722 case RADIUS_CODE_ACCESS_REJECT:
1723 sm->eap_if->aaaFail = TRUE;
1724 override_eapReq = 1;
1725 break;
1726 case RADIUS_CODE_ACCESS_CHALLENGE:
1727 sm->eap_if->aaaEapReq = TRUE;
1728 if (session_timeout_set) {
1729 /* RFC 2869, Ch. 2.3.2; RFC 3580, Ch. 3.17 */
1730 sm->eap_if->aaaMethodTimeout = session_timeout;
1731 hostapd_logger(hapd, sm->addr,
1732 HOSTAPD_MODULE_IEEE8021X,
1733 HOSTAPD_LEVEL_DEBUG,
1734 "using EAP timeout of %d seconds (from "
1735 "RADIUS)",
1736 sm->eap_if->aaaMethodTimeout);
1737 } else {
1738 /*
1739 * Use dynamic retransmission behavior per EAP
1740 * specification.
1741 */
1742 sm->eap_if->aaaMethodTimeout = 0;
1743 }
1744 break;
1745 }
1746
1747 ieee802_1x_decapsulate_radius(hapd, sta);
1748 if (override_eapReq)
1749 sm->eap_if->aaaEapReq = FALSE;
1750
1751 eapol_auth_step(sm);
1752
1753 return RADIUS_RX_QUEUED;
1754 }
1755 #endif /* CONFIG_NO_RADIUS */
1756
1757
ieee802_1x_abort_auth(struct hostapd_data * hapd,struct sta_info * sta)1758 void ieee802_1x_abort_auth(struct hostapd_data *hapd, struct sta_info *sta)
1759 {
1760 struct eapol_state_machine *sm = sta->eapol_sm;
1761 if (sm == NULL)
1762 return;
1763
1764 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1765 HOSTAPD_LEVEL_DEBUG, "aborting authentication");
1766
1767 #ifndef CONFIG_NO_RADIUS
1768 radius_msg_free(sm->last_recv_radius);
1769 sm->last_recv_radius = NULL;
1770 #endif /* CONFIG_NO_RADIUS */
1771
1772 if (sm->eap_if->eapTimeout) {
1773 /*
1774 * Disconnect the STA since it did not reply to the last EAP
1775 * request and we cannot continue EAP processing (EAP-Failure
1776 * could only be sent if the EAP peer actually replied).
1777 */
1778 wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "EAP Timeout, STA " MACSTR,
1779 MAC2STR(sta->addr));
1780
1781 sm->eap_if->portEnabled = FALSE;
1782 ap_sta_disconnect(hapd, sta, sta->addr,
1783 WLAN_REASON_PREV_AUTH_NOT_VALID);
1784 }
1785 }
1786
1787
ieee802_1x_rekey_broadcast(struct hostapd_data * hapd)1788 static int ieee802_1x_rekey_broadcast(struct hostapd_data *hapd)
1789 {
1790 struct eapol_authenticator *eapol = hapd->eapol_auth;
1791
1792 if (hapd->conf->default_wep_key_len < 1)
1793 return 0;
1794
1795 os_free(eapol->default_wep_key);
1796 eapol->default_wep_key = os_malloc(hapd->conf->default_wep_key_len);
1797 if (eapol->default_wep_key == NULL ||
1798 random_get_bytes(eapol->default_wep_key,
1799 hapd->conf->default_wep_key_len)) {
1800 wpa_printf(MSG_INFO, "Could not generate random WEP key");
1801 os_free(eapol->default_wep_key);
1802 eapol->default_wep_key = NULL;
1803 return -1;
1804 }
1805
1806 wpa_hexdump_key(MSG_DEBUG, "IEEE 802.1X: New default WEP key",
1807 eapol->default_wep_key,
1808 hapd->conf->default_wep_key_len);
1809
1810 return 0;
1811 }
1812
1813
ieee802_1x_sta_key_available(struct hostapd_data * hapd,struct sta_info * sta,void * ctx)1814 static int ieee802_1x_sta_key_available(struct hostapd_data *hapd,
1815 struct sta_info *sta, void *ctx)
1816 {
1817 if (sta->eapol_sm) {
1818 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
1819 eapol_auth_step(sta->eapol_sm);
1820 }
1821 return 0;
1822 }
1823
1824
ieee802_1x_rekey(void * eloop_ctx,void * timeout_ctx)1825 static void ieee802_1x_rekey(void *eloop_ctx, void *timeout_ctx)
1826 {
1827 struct hostapd_data *hapd = eloop_ctx;
1828 struct eapol_authenticator *eapol = hapd->eapol_auth;
1829
1830 if (eapol->default_wep_key_idx >= 3)
1831 eapol->default_wep_key_idx =
1832 hapd->conf->individual_wep_key_len > 0 ? 1 : 0;
1833 else
1834 eapol->default_wep_key_idx++;
1835
1836 wpa_printf(MSG_DEBUG, "IEEE 802.1X: New default WEP key index %d",
1837 eapol->default_wep_key_idx);
1838
1839 if (ieee802_1x_rekey_broadcast(hapd)) {
1840 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1841 HOSTAPD_LEVEL_WARNING, "failed to generate a "
1842 "new broadcast key");
1843 os_free(eapol->default_wep_key);
1844 eapol->default_wep_key = NULL;
1845 return;
1846 }
1847
1848 /* TODO: Could setup key for RX here, but change default TX keyid only
1849 * after new broadcast key has been sent to all stations. */
1850 if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
1851 broadcast_ether_addr,
1852 eapol->default_wep_key_idx, 1, NULL, 0,
1853 eapol->default_wep_key,
1854 hapd->conf->default_wep_key_len)) {
1855 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1856 HOSTAPD_LEVEL_WARNING, "failed to configure a "
1857 "new broadcast key");
1858 os_free(eapol->default_wep_key);
1859 eapol->default_wep_key = NULL;
1860 return;
1861 }
1862
1863 ap_for_each_sta(hapd, ieee802_1x_sta_key_available, NULL);
1864
1865 if (hapd->conf->wep_rekeying_period > 0) {
1866 eloop_register_timeout(hapd->conf->wep_rekeying_period, 0,
1867 ieee802_1x_rekey, hapd, NULL);
1868 }
1869 }
1870
1871
ieee802_1x_eapol_send(void * ctx,void * sta_ctx,u8 type,const u8 * data,size_t datalen)1872 static void ieee802_1x_eapol_send(void *ctx, void *sta_ctx, u8 type,
1873 const u8 *data, size_t datalen)
1874 {
1875 #ifdef CONFIG_WPS
1876 struct sta_info *sta = sta_ctx;
1877
1878 if ((sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) ==
1879 WLAN_STA_MAYBE_WPS) {
1880 const u8 *identity;
1881 size_t identity_len;
1882 struct eapol_state_machine *sm = sta->eapol_sm;
1883
1884 identity = eap_get_identity(sm->eap, &identity_len);
1885 if (identity &&
1886 ((identity_len == WSC_ID_ENROLLEE_LEN &&
1887 os_memcmp(identity, WSC_ID_ENROLLEE,
1888 WSC_ID_ENROLLEE_LEN) == 0) ||
1889 (identity_len == WSC_ID_REGISTRAR_LEN &&
1890 os_memcmp(identity, WSC_ID_REGISTRAR,
1891 WSC_ID_REGISTRAR_LEN) == 0))) {
1892 wpa_printf(MSG_DEBUG, "WPS: WLAN_STA_MAYBE_WPS -> "
1893 "WLAN_STA_WPS");
1894 sta->flags |= WLAN_STA_WPS;
1895 }
1896 }
1897 #endif /* CONFIG_WPS */
1898
1899 ieee802_1x_send(ctx, sta_ctx, type, data, datalen);
1900 }
1901
1902
ieee802_1x_aaa_send(void * ctx,void * sta_ctx,const u8 * data,size_t datalen)1903 static void ieee802_1x_aaa_send(void *ctx, void *sta_ctx,
1904 const u8 *data, size_t datalen)
1905 {
1906 #ifndef CONFIG_NO_RADIUS
1907 struct hostapd_data *hapd = ctx;
1908 struct sta_info *sta = sta_ctx;
1909
1910 ieee802_1x_encapsulate_radius(hapd, sta, data, datalen);
1911 #endif /* CONFIG_NO_RADIUS */
1912 }
1913
1914
_ieee802_1x_finished(void * ctx,void * sta_ctx,int success,int preauth,int remediation)1915 static void _ieee802_1x_finished(void *ctx, void *sta_ctx, int success,
1916 int preauth, int remediation)
1917 {
1918 struct hostapd_data *hapd = ctx;
1919 struct sta_info *sta = sta_ctx;
1920 if (preauth)
1921 rsn_preauth_finished(hapd, sta, success);
1922 else
1923 ieee802_1x_finished(hapd, sta, success, remediation);
1924 }
1925
1926
ieee802_1x_get_eap_user(void * ctx,const u8 * identity,size_t identity_len,int phase2,struct eap_user * user)1927 static int ieee802_1x_get_eap_user(void *ctx, const u8 *identity,
1928 size_t identity_len, int phase2,
1929 struct eap_user *user)
1930 {
1931 struct hostapd_data *hapd = ctx;
1932 const struct hostapd_eap_user *eap_user;
1933 int i;
1934 int rv = -1;
1935
1936 eap_user = hostapd_get_eap_user(hapd, identity, identity_len, phase2);
1937 if (eap_user == NULL)
1938 goto out;
1939
1940 os_memset(user, 0, sizeof(*user));
1941 user->phase2 = phase2;
1942 for (i = 0; i < EAP_MAX_METHODS; i++) {
1943 user->methods[i].vendor = eap_user->methods[i].vendor;
1944 user->methods[i].method = eap_user->methods[i].method;
1945 }
1946
1947 if (eap_user->password) {
1948 user->password = os_malloc(eap_user->password_len);
1949 if (user->password == NULL)
1950 goto out;
1951 os_memcpy(user->password, eap_user->password,
1952 eap_user->password_len);
1953 user->password_len = eap_user->password_len;
1954 user->password_hash = eap_user->password_hash;
1955 }
1956 user->force_version = eap_user->force_version;
1957 user->macacl = eap_user->macacl;
1958 user->ttls_auth = eap_user->ttls_auth;
1959 user->remediation = eap_user->remediation;
1960 rv = 0;
1961
1962 out:
1963 if (rv)
1964 wpa_printf(MSG_DEBUG, "%s: Failed to find user", __func__);
1965
1966 return rv;
1967 }
1968
1969
ieee802_1x_sta_entry_alive(void * ctx,const u8 * addr)1970 static int ieee802_1x_sta_entry_alive(void *ctx, const u8 *addr)
1971 {
1972 struct hostapd_data *hapd = ctx;
1973 struct sta_info *sta;
1974 sta = ap_get_sta(hapd, addr);
1975 if (sta == NULL || sta->eapol_sm == NULL)
1976 return 0;
1977 return 1;
1978 }
1979
1980
ieee802_1x_logger(void * ctx,const u8 * addr,eapol_logger_level level,const char * txt)1981 static void ieee802_1x_logger(void *ctx, const u8 *addr,
1982 eapol_logger_level level, const char *txt)
1983 {
1984 #ifndef CONFIG_NO_HOSTAPD_LOGGER
1985 struct hostapd_data *hapd = ctx;
1986 int hlevel;
1987
1988 switch (level) {
1989 case EAPOL_LOGGER_WARNING:
1990 hlevel = HOSTAPD_LEVEL_WARNING;
1991 break;
1992 case EAPOL_LOGGER_INFO:
1993 hlevel = HOSTAPD_LEVEL_INFO;
1994 break;
1995 case EAPOL_LOGGER_DEBUG:
1996 default:
1997 hlevel = HOSTAPD_LEVEL_DEBUG;
1998 break;
1999 }
2000
2001 hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE8021X, hlevel, "%s",
2002 txt);
2003 #endif /* CONFIG_NO_HOSTAPD_LOGGER */
2004 }
2005
2006
ieee802_1x_set_port_authorized(void * ctx,void * sta_ctx,int authorized)2007 static void ieee802_1x_set_port_authorized(void *ctx, void *sta_ctx,
2008 int authorized)
2009 {
2010 struct hostapd_data *hapd = ctx;
2011 struct sta_info *sta = sta_ctx;
2012 ieee802_1x_set_sta_authorized(hapd, sta, authorized);
2013 }
2014
2015
_ieee802_1x_abort_auth(void * ctx,void * sta_ctx)2016 static void _ieee802_1x_abort_auth(void *ctx, void *sta_ctx)
2017 {
2018 struct hostapd_data *hapd = ctx;
2019 struct sta_info *sta = sta_ctx;
2020 ieee802_1x_abort_auth(hapd, sta);
2021 }
2022
2023
_ieee802_1x_tx_key(void * ctx,void * sta_ctx)2024 static void _ieee802_1x_tx_key(void *ctx, void *sta_ctx)
2025 {
2026 struct hostapd_data *hapd = ctx;
2027 struct sta_info *sta = sta_ctx;
2028 ieee802_1x_tx_key(hapd, sta);
2029 }
2030
2031
ieee802_1x_eapol_event(void * ctx,void * sta_ctx,enum eapol_event type)2032 static void ieee802_1x_eapol_event(void *ctx, void *sta_ctx,
2033 enum eapol_event type)
2034 {
2035 /* struct hostapd_data *hapd = ctx; */
2036 struct sta_info *sta = sta_ctx;
2037 switch (type) {
2038 case EAPOL_AUTH_SM_CHANGE:
2039 wpa_auth_sm_notify(sta->wpa_sm);
2040 break;
2041 case EAPOL_AUTH_REAUTHENTICATE:
2042 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
2043 break;
2044 }
2045 }
2046
2047
2048 #ifdef CONFIG_ERP
2049
2050 static struct eap_server_erp_key *
ieee802_1x_erp_get_key(void * ctx,const char * keyname)2051 ieee802_1x_erp_get_key(void *ctx, const char *keyname)
2052 {
2053 struct hostapd_data *hapd = ctx;
2054 struct eap_server_erp_key *erp;
2055
2056 dl_list_for_each(erp, &hapd->erp_keys, struct eap_server_erp_key,
2057 list) {
2058 if (os_strcmp(erp->keyname_nai, keyname) == 0)
2059 return erp;
2060 }
2061
2062 return NULL;
2063 }
2064
2065
ieee802_1x_erp_add_key(void * ctx,struct eap_server_erp_key * erp)2066 static int ieee802_1x_erp_add_key(void *ctx, struct eap_server_erp_key *erp)
2067 {
2068 struct hostapd_data *hapd = ctx;
2069
2070 dl_list_add(&hapd->erp_keys, &erp->list);
2071 return 0;
2072 }
2073
2074 #endif /* CONFIG_ERP */
2075
2076
ieee802_1x_init(struct hostapd_data * hapd)2077 int ieee802_1x_init(struct hostapd_data *hapd)
2078 {
2079 int i;
2080 struct eapol_auth_config conf;
2081 struct eapol_auth_cb cb;
2082
2083 dl_list_init(&hapd->erp_keys);
2084
2085 os_memset(&conf, 0, sizeof(conf));
2086 conf.ctx = hapd;
2087 conf.eap_reauth_period = hapd->conf->eap_reauth_period;
2088 conf.wpa = hapd->conf->wpa;
2089 conf.individual_wep_key_len = hapd->conf->individual_wep_key_len;
2090 conf.eap_server = hapd->conf->eap_server;
2091 conf.ssl_ctx = hapd->ssl_ctx;
2092 conf.msg_ctx = hapd->msg_ctx;
2093 conf.eap_sim_db_priv = hapd->eap_sim_db_priv;
2094 conf.eap_req_id_text = hapd->conf->eap_req_id_text;
2095 conf.eap_req_id_text_len = hapd->conf->eap_req_id_text_len;
2096 conf.erp_send_reauth_start = hapd->conf->erp_send_reauth_start;
2097 conf.erp_domain = hapd->conf->erp_domain;
2098 conf.erp = hapd->conf->eap_server_erp;
2099 conf.pac_opaque_encr_key = hapd->conf->pac_opaque_encr_key;
2100 conf.eap_fast_a_id = hapd->conf->eap_fast_a_id;
2101 conf.eap_fast_a_id_len = hapd->conf->eap_fast_a_id_len;
2102 conf.eap_fast_a_id_info = hapd->conf->eap_fast_a_id_info;
2103 conf.eap_fast_prov = hapd->conf->eap_fast_prov;
2104 conf.pac_key_lifetime = hapd->conf->pac_key_lifetime;
2105 conf.pac_key_refresh_time = hapd->conf->pac_key_refresh_time;
2106 conf.eap_sim_aka_result_ind = hapd->conf->eap_sim_aka_result_ind;
2107 conf.tnc = hapd->conf->tnc;
2108 conf.wps = hapd->wps;
2109 conf.fragment_size = hapd->conf->fragment_size;
2110 conf.pwd_group = hapd->conf->pwd_group;
2111 conf.pbc_in_m1 = hapd->conf->pbc_in_m1;
2112 if (hapd->conf->server_id) {
2113 conf.server_id = (const u8 *) hapd->conf->server_id;
2114 conf.server_id_len = os_strlen(hapd->conf->server_id);
2115 } else {
2116 conf.server_id = (const u8 *) "hostapd";
2117 conf.server_id_len = 7;
2118 }
2119
2120 os_memset(&cb, 0, sizeof(cb));
2121 cb.eapol_send = ieee802_1x_eapol_send;
2122 cb.aaa_send = ieee802_1x_aaa_send;
2123 cb.finished = _ieee802_1x_finished;
2124 cb.get_eap_user = ieee802_1x_get_eap_user;
2125 cb.sta_entry_alive = ieee802_1x_sta_entry_alive;
2126 cb.logger = ieee802_1x_logger;
2127 cb.set_port_authorized = ieee802_1x_set_port_authorized;
2128 cb.abort_auth = _ieee802_1x_abort_auth;
2129 cb.tx_key = _ieee802_1x_tx_key;
2130 cb.eapol_event = ieee802_1x_eapol_event;
2131 #ifdef CONFIG_ERP
2132 cb.erp_get_key = ieee802_1x_erp_get_key;
2133 cb.erp_add_key = ieee802_1x_erp_add_key;
2134 #endif /* CONFIG_ERP */
2135
2136 hapd->eapol_auth = eapol_auth_init(&conf, &cb);
2137 if (hapd->eapol_auth == NULL)
2138 return -1;
2139
2140 if ((hapd->conf->ieee802_1x || hapd->conf->wpa) &&
2141 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 1))
2142 return -1;
2143
2144 #ifndef CONFIG_NO_RADIUS
2145 if (radius_client_register(hapd->radius, RADIUS_AUTH,
2146 ieee802_1x_receive_auth, hapd))
2147 return -1;
2148 #endif /* CONFIG_NO_RADIUS */
2149
2150 if (hapd->conf->default_wep_key_len) {
2151 for (i = 0; i < 4; i++)
2152 hostapd_drv_set_key(hapd->conf->iface, hapd,
2153 WPA_ALG_NONE, NULL, i, 0, NULL, 0,
2154 NULL, 0);
2155
2156 ieee802_1x_rekey(hapd, NULL);
2157
2158 if (hapd->eapol_auth->default_wep_key == NULL)
2159 return -1;
2160 }
2161
2162 return 0;
2163 }
2164
2165
ieee802_1x_erp_flush(struct hostapd_data * hapd)2166 void ieee802_1x_erp_flush(struct hostapd_data *hapd)
2167 {
2168 struct eap_server_erp_key *erp;
2169
2170 while ((erp = dl_list_first(&hapd->erp_keys, struct eap_server_erp_key,
2171 list)) != NULL) {
2172 dl_list_del(&erp->list);
2173 bin_clear_free(erp, sizeof(*erp));
2174 }
2175 }
2176
2177
ieee802_1x_deinit(struct hostapd_data * hapd)2178 void ieee802_1x_deinit(struct hostapd_data *hapd)
2179 {
2180 eloop_cancel_timeout(ieee802_1x_rekey, hapd, NULL);
2181
2182 if (hapd->driver != NULL &&
2183 (hapd->conf->ieee802_1x || hapd->conf->wpa))
2184 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0);
2185
2186 eapol_auth_deinit(hapd->eapol_auth);
2187 hapd->eapol_auth = NULL;
2188
2189 ieee802_1x_erp_flush(hapd);
2190 }
2191
2192
ieee802_1x_tx_status(struct hostapd_data * hapd,struct sta_info * sta,const u8 * buf,size_t len,int ack)2193 int ieee802_1x_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
2194 const u8 *buf, size_t len, int ack)
2195 {
2196 struct ieee80211_hdr *hdr;
2197 u8 *pos;
2198 const unsigned char rfc1042_hdr[ETH_ALEN] =
2199 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
2200
2201 if (sta == NULL)
2202 return -1;
2203 if (len < sizeof(*hdr) + sizeof(rfc1042_hdr) + 2)
2204 return 0;
2205
2206 hdr = (struct ieee80211_hdr *) buf;
2207 pos = (u8 *) (hdr + 1);
2208 if (os_memcmp(pos, rfc1042_hdr, sizeof(rfc1042_hdr)) != 0)
2209 return 0;
2210 pos += sizeof(rfc1042_hdr);
2211 if (WPA_GET_BE16(pos) != ETH_P_PAE)
2212 return 0;
2213 pos += 2;
2214
2215 return ieee802_1x_eapol_tx_status(hapd, sta, pos, buf + len - pos,
2216 ack);
2217 }
2218
2219
ieee802_1x_eapol_tx_status(struct hostapd_data * hapd,struct sta_info * sta,const u8 * buf,int len,int ack)2220 int ieee802_1x_eapol_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
2221 const u8 *buf, int len, int ack)
2222 {
2223 const struct ieee802_1x_hdr *xhdr =
2224 (const struct ieee802_1x_hdr *) buf;
2225 const u8 *pos = buf + sizeof(*xhdr);
2226 struct ieee802_1x_eapol_key *key;
2227
2228 if (len < (int) sizeof(*xhdr))
2229 return 0;
2230 wpa_printf(MSG_DEBUG, "IEEE 802.1X: " MACSTR " TX status - version=%d "
2231 "type=%d length=%d - ack=%d",
2232 MAC2STR(sta->addr), xhdr->version, xhdr->type,
2233 be_to_host16(xhdr->length), ack);
2234
2235 if (xhdr->type != IEEE802_1X_TYPE_EAPOL_KEY)
2236 return 0;
2237
2238 if (pos + sizeof(struct wpa_eapol_key) <= buf + len) {
2239 const struct wpa_eapol_key *wpa;
2240 wpa = (const struct wpa_eapol_key *) pos;
2241 if (wpa->type == EAPOL_KEY_TYPE_RSN ||
2242 wpa->type == EAPOL_KEY_TYPE_WPA)
2243 wpa_auth_eapol_key_tx_status(hapd->wpa_auth,
2244 sta->wpa_sm, ack);
2245 }
2246
2247 /* EAPOL EAP-Packet packets are eventually re-sent by either Supplicant
2248 * or Authenticator state machines, but EAPOL-Key packets are not
2249 * retransmitted in case of failure. Try to re-send failed EAPOL-Key
2250 * packets couple of times because otherwise STA keys become
2251 * unsynchronized with AP. */
2252 if (!ack && pos + sizeof(*key) <= buf + len) {
2253 key = (struct ieee802_1x_eapol_key *) pos;
2254 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
2255 HOSTAPD_LEVEL_DEBUG, "did not Ack EAPOL-Key "
2256 "frame (%scast index=%d)",
2257 key->key_index & BIT(7) ? "uni" : "broad",
2258 key->key_index & ~BIT(7));
2259 /* TODO: re-send EAPOL-Key couple of times (with short delay
2260 * between them?). If all attempt fail, report error and
2261 * deauthenticate STA so that it will get new keys when
2262 * authenticating again (e.g., after returning in range).
2263 * Separate limit/transmit state needed both for unicast and
2264 * broadcast keys(?) */
2265 }
2266 /* TODO: could move unicast key configuration from ieee802_1x_tx_key()
2267 * to here and change the key only if the EAPOL-Key packet was Acked.
2268 */
2269
2270 return 1;
2271 }
2272
2273
ieee802_1x_get_identity(struct eapol_state_machine * sm,size_t * len)2274 u8 * ieee802_1x_get_identity(struct eapol_state_machine *sm, size_t *len)
2275 {
2276 if (sm == NULL || sm->identity == NULL)
2277 return NULL;
2278
2279 *len = sm->identity_len;
2280 return sm->identity;
2281 }
2282
2283
ieee802_1x_get_radius_class(struct eapol_state_machine * sm,size_t * len,int idx)2284 u8 * ieee802_1x_get_radius_class(struct eapol_state_machine *sm, size_t *len,
2285 int idx)
2286 {
2287 if (sm == NULL || sm->radius_class.attr == NULL ||
2288 idx >= (int) sm->radius_class.count)
2289 return NULL;
2290
2291 *len = sm->radius_class.attr[idx].len;
2292 return sm->radius_class.attr[idx].data;
2293 }
2294
2295
ieee802_1x_get_radius_cui(struct eapol_state_machine * sm)2296 struct wpabuf * ieee802_1x_get_radius_cui(struct eapol_state_machine *sm)
2297 {
2298 if (sm == NULL)
2299 return NULL;
2300 return sm->radius_cui;
2301 }
2302
2303
ieee802_1x_get_key(struct eapol_state_machine * sm,size_t * len)2304 const u8 * ieee802_1x_get_key(struct eapol_state_machine *sm, size_t *len)
2305 {
2306 *len = 0;
2307 if (sm == NULL)
2308 return NULL;
2309
2310 *len = sm->eap_if->eapKeyDataLen;
2311 return sm->eap_if->eapKeyData;
2312 }
2313
2314
ieee802_1x_notify_port_enabled(struct eapol_state_machine * sm,int enabled)2315 void ieee802_1x_notify_port_enabled(struct eapol_state_machine *sm,
2316 int enabled)
2317 {
2318 if (sm == NULL)
2319 return;
2320 sm->eap_if->portEnabled = enabled ? TRUE : FALSE;
2321 eapol_auth_step(sm);
2322 }
2323
2324
ieee802_1x_notify_port_valid(struct eapol_state_machine * sm,int valid)2325 void ieee802_1x_notify_port_valid(struct eapol_state_machine *sm,
2326 int valid)
2327 {
2328 if (sm == NULL)
2329 return;
2330 sm->portValid = valid ? TRUE : FALSE;
2331 eapol_auth_step(sm);
2332 }
2333
2334
ieee802_1x_notify_pre_auth(struct eapol_state_machine * sm,int pre_auth)2335 void ieee802_1x_notify_pre_auth(struct eapol_state_machine *sm, int pre_auth)
2336 {
2337 if (sm == NULL)
2338 return;
2339 if (pre_auth)
2340 sm->flags |= EAPOL_SM_PREAUTH;
2341 else
2342 sm->flags &= ~EAPOL_SM_PREAUTH;
2343 }
2344
2345
bool_txt(Boolean val)2346 static const char * bool_txt(Boolean val)
2347 {
2348 return val ? "TRUE" : "FALSE";
2349 }
2350
2351
ieee802_1x_get_mib(struct hostapd_data * hapd,char * buf,size_t buflen)2352 int ieee802_1x_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
2353 {
2354 /* TODO */
2355 return 0;
2356 }
2357
2358
ieee802_1x_get_mib_sta(struct hostapd_data * hapd,struct sta_info * sta,char * buf,size_t buflen)2359 int ieee802_1x_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
2360 char *buf, size_t buflen)
2361 {
2362 int len = 0, ret;
2363 struct eapol_state_machine *sm = sta->eapol_sm;
2364 struct os_reltime diff;
2365 const char *name1;
2366 const char *name2;
2367
2368 if (sm == NULL)
2369 return 0;
2370
2371 ret = os_snprintf(buf + len, buflen - len,
2372 "dot1xPaePortNumber=%d\n"
2373 "dot1xPaePortProtocolVersion=%d\n"
2374 "dot1xPaePortCapabilities=1\n"
2375 "dot1xPaePortInitialize=%d\n"
2376 "dot1xPaePortReauthenticate=FALSE\n",
2377 sta->aid,
2378 EAPOL_VERSION,
2379 sm->initialize);
2380 if (os_snprintf_error(buflen - len, ret))
2381 return len;
2382 len += ret;
2383
2384 /* dot1xAuthConfigTable */
2385 ret = os_snprintf(buf + len, buflen - len,
2386 "dot1xAuthPaeState=%d\n"
2387 "dot1xAuthBackendAuthState=%d\n"
2388 "dot1xAuthAdminControlledDirections=%d\n"
2389 "dot1xAuthOperControlledDirections=%d\n"
2390 "dot1xAuthAuthControlledPortStatus=%d\n"
2391 "dot1xAuthAuthControlledPortControl=%d\n"
2392 "dot1xAuthQuietPeriod=%u\n"
2393 "dot1xAuthServerTimeout=%u\n"
2394 "dot1xAuthReAuthPeriod=%u\n"
2395 "dot1xAuthReAuthEnabled=%s\n"
2396 "dot1xAuthKeyTxEnabled=%s\n",
2397 sm->auth_pae_state + 1,
2398 sm->be_auth_state + 1,
2399 sm->adminControlledDirections,
2400 sm->operControlledDirections,
2401 sm->authPortStatus,
2402 sm->portControl,
2403 sm->quietPeriod,
2404 sm->serverTimeout,
2405 sm->reAuthPeriod,
2406 bool_txt(sm->reAuthEnabled),
2407 bool_txt(sm->keyTxEnabled));
2408 if (os_snprintf_error(buflen - len, ret))
2409 return len;
2410 len += ret;
2411
2412 /* dot1xAuthStatsTable */
2413 ret = os_snprintf(buf + len, buflen - len,
2414 "dot1xAuthEapolFramesRx=%u\n"
2415 "dot1xAuthEapolFramesTx=%u\n"
2416 "dot1xAuthEapolStartFramesRx=%u\n"
2417 "dot1xAuthEapolLogoffFramesRx=%u\n"
2418 "dot1xAuthEapolRespIdFramesRx=%u\n"
2419 "dot1xAuthEapolRespFramesRx=%u\n"
2420 "dot1xAuthEapolReqIdFramesTx=%u\n"
2421 "dot1xAuthEapolReqFramesTx=%u\n"
2422 "dot1xAuthInvalidEapolFramesRx=%u\n"
2423 "dot1xAuthEapLengthErrorFramesRx=%u\n"
2424 "dot1xAuthLastEapolFrameVersion=%u\n"
2425 "dot1xAuthLastEapolFrameSource=" MACSTR "\n",
2426 sm->dot1xAuthEapolFramesRx,
2427 sm->dot1xAuthEapolFramesTx,
2428 sm->dot1xAuthEapolStartFramesRx,
2429 sm->dot1xAuthEapolLogoffFramesRx,
2430 sm->dot1xAuthEapolRespIdFramesRx,
2431 sm->dot1xAuthEapolRespFramesRx,
2432 sm->dot1xAuthEapolReqIdFramesTx,
2433 sm->dot1xAuthEapolReqFramesTx,
2434 sm->dot1xAuthInvalidEapolFramesRx,
2435 sm->dot1xAuthEapLengthErrorFramesRx,
2436 sm->dot1xAuthLastEapolFrameVersion,
2437 MAC2STR(sm->addr));
2438 if (os_snprintf_error(buflen - len, ret))
2439 return len;
2440 len += ret;
2441
2442 /* dot1xAuthDiagTable */
2443 ret = os_snprintf(buf + len, buflen - len,
2444 "dot1xAuthEntersConnecting=%u\n"
2445 "dot1xAuthEapLogoffsWhileConnecting=%u\n"
2446 "dot1xAuthEntersAuthenticating=%u\n"
2447 "dot1xAuthAuthSuccessesWhileAuthenticating=%u\n"
2448 "dot1xAuthAuthTimeoutsWhileAuthenticating=%u\n"
2449 "dot1xAuthAuthFailWhileAuthenticating=%u\n"
2450 "dot1xAuthAuthEapStartsWhileAuthenticating=%u\n"
2451 "dot1xAuthAuthEapLogoffWhileAuthenticating=%u\n"
2452 "dot1xAuthAuthReauthsWhileAuthenticated=%u\n"
2453 "dot1xAuthAuthEapStartsWhileAuthenticated=%u\n"
2454 "dot1xAuthAuthEapLogoffWhileAuthenticated=%u\n"
2455 "dot1xAuthBackendResponses=%u\n"
2456 "dot1xAuthBackendAccessChallenges=%u\n"
2457 "dot1xAuthBackendOtherRequestsToSupplicant=%u\n"
2458 "dot1xAuthBackendAuthSuccesses=%u\n"
2459 "dot1xAuthBackendAuthFails=%u\n",
2460 sm->authEntersConnecting,
2461 sm->authEapLogoffsWhileConnecting,
2462 sm->authEntersAuthenticating,
2463 sm->authAuthSuccessesWhileAuthenticating,
2464 sm->authAuthTimeoutsWhileAuthenticating,
2465 sm->authAuthFailWhileAuthenticating,
2466 sm->authAuthEapStartsWhileAuthenticating,
2467 sm->authAuthEapLogoffWhileAuthenticating,
2468 sm->authAuthReauthsWhileAuthenticated,
2469 sm->authAuthEapStartsWhileAuthenticated,
2470 sm->authAuthEapLogoffWhileAuthenticated,
2471 sm->backendResponses,
2472 sm->backendAccessChallenges,
2473 sm->backendOtherRequestsToSupplicant,
2474 sm->backendAuthSuccesses,
2475 sm->backendAuthFails);
2476 if (os_snprintf_error(buflen - len, ret))
2477 return len;
2478 len += ret;
2479
2480 /* dot1xAuthSessionStatsTable */
2481 os_reltime_age(&sta->acct_session_start, &diff);
2482 ret = os_snprintf(buf + len, buflen - len,
2483 /* TODO: dot1xAuthSessionOctetsRx */
2484 /* TODO: dot1xAuthSessionOctetsTx */
2485 /* TODO: dot1xAuthSessionFramesRx */
2486 /* TODO: dot1xAuthSessionFramesTx */
2487 "dot1xAuthSessionId=%08X-%08X\n"
2488 "dot1xAuthSessionAuthenticMethod=%d\n"
2489 "dot1xAuthSessionTime=%u\n"
2490 "dot1xAuthSessionTerminateCause=999\n"
2491 "dot1xAuthSessionUserName=%s\n",
2492 sta->acct_session_id_hi, sta->acct_session_id_lo,
2493 (wpa_key_mgmt_wpa_ieee8021x(
2494 wpa_auth_sta_key_mgmt(sta->wpa_sm))) ?
2495 1 : 2,
2496 (unsigned int) diff.sec,
2497 sm->identity);
2498 if (os_snprintf_error(buflen - len, ret))
2499 return len;
2500 len += ret;
2501
2502 if (sm->acct_multi_session_id_hi) {
2503 ret = os_snprintf(buf + len, buflen - len,
2504 "authMultiSessionId=%08X+%08X\n",
2505 sm->acct_multi_session_id_hi,
2506 sm->acct_multi_session_id_lo);
2507 if (os_snprintf_error(buflen - len, ret))
2508 return len;
2509 len += ret;
2510 }
2511
2512 name1 = eap_server_get_name(0, sm->eap_type_authsrv);
2513 name2 = eap_server_get_name(0, sm->eap_type_supp);
2514 ret = os_snprintf(buf + len, buflen - len,
2515 "last_eap_type_as=%d (%s)\n"
2516 "last_eap_type_sta=%d (%s)\n",
2517 sm->eap_type_authsrv, name1,
2518 sm->eap_type_supp, name2);
2519 if (os_snprintf_error(buflen - len, ret))
2520 return len;
2521 len += ret;
2522
2523 return len;
2524 }
2525
2526
ieee802_1x_finished(struct hostapd_data * hapd,struct sta_info * sta,int success,int remediation)2527 static void ieee802_1x_finished(struct hostapd_data *hapd,
2528 struct sta_info *sta, int success,
2529 int remediation)
2530 {
2531 const u8 *key;
2532 size_t len;
2533 /* TODO: get PMKLifetime from WPA parameters */
2534 static const int dot11RSNAConfigPMKLifetime = 43200;
2535 unsigned int session_timeout;
2536
2537 #ifdef CONFIG_HS20
2538 if (remediation && !sta->remediation) {
2539 sta->remediation = 1;
2540 os_free(sta->remediation_url);
2541 sta->remediation_url =
2542 os_strdup(hapd->conf->subscr_remediation_url);
2543 sta->remediation_method = 1; /* SOAP-XML SPP */
2544 }
2545
2546 if (success) {
2547 if (sta->remediation) {
2548 wpa_printf(MSG_DEBUG, "HS 2.0: Send WNM-Notification "
2549 "to " MACSTR " to indicate Subscription "
2550 "Remediation",
2551 MAC2STR(sta->addr));
2552 hs20_send_wnm_notification(hapd, sta->addr,
2553 sta->remediation_method,
2554 sta->remediation_url);
2555 os_free(sta->remediation_url);
2556 sta->remediation_url = NULL;
2557 }
2558
2559 if (sta->hs20_deauth_req) {
2560 wpa_printf(MSG_DEBUG, "HS 2.0: Send WNM-Notification "
2561 "to " MACSTR " to indicate imminent "
2562 "deauthentication", MAC2STR(sta->addr));
2563 hs20_send_wnm_notification_deauth_req(
2564 hapd, sta->addr, sta->hs20_deauth_req);
2565 }
2566 }
2567 #endif /* CONFIG_HS20 */
2568
2569 key = ieee802_1x_get_key(sta->eapol_sm, &len);
2570 if (sta->session_timeout_set)
2571 session_timeout = sta->session_timeout;
2572 else
2573 session_timeout = dot11RSNAConfigPMKLifetime;
2574 if (success && key && len >= PMK_LEN && !sta->remediation &&
2575 !sta->hs20_deauth_requested &&
2576 wpa_auth_pmksa_add(sta->wpa_sm, key, session_timeout,
2577 sta->eapol_sm) == 0) {
2578 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
2579 HOSTAPD_LEVEL_DEBUG,
2580 "Added PMKSA cache entry (IEEE 802.1X)");
2581 }
2582
2583 if (!success) {
2584 /*
2585 * Many devices require deauthentication after WPS provisioning
2586 * and some may not be be able to do that themselves, so
2587 * disconnect the client here. In addition, this may also
2588 * benefit IEEE 802.1X/EAPOL authentication cases, too since
2589 * the EAPOL PAE state machine would remain in HELD state for
2590 * considerable amount of time and some EAP methods, like
2591 * EAP-FAST with anonymous provisioning, may require another
2592 * EAPOL authentication to be started to complete connection.
2593 */
2594 wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "IEEE 802.1X: Force "
2595 "disconnection after EAP-Failure");
2596 /* Add a small sleep to increase likelihood of previously
2597 * requested EAP-Failure TX getting out before this should the
2598 * driver reorder operations.
2599 */
2600 os_sleep(0, 10000);
2601 ap_sta_disconnect(hapd, sta, sta->addr,
2602 WLAN_REASON_IEEE_802_1X_AUTH_FAILED);
2603 hostapd_wps_eap_completed(hapd);
2604 }
2605 }
2606