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 "ieee802_1x.h"
33
34
35 static void ieee802_1x_finished(struct hostapd_data *hapd,
36 struct sta_info *sta, int success);
37
38
ieee802_1x_send(struct hostapd_data * hapd,struct sta_info * sta,u8 type,const u8 * data,size_t datalen)39 static void ieee802_1x_send(struct hostapd_data *hapd, struct sta_info *sta,
40 u8 type, const u8 *data, size_t datalen)
41 {
42 u8 *buf;
43 struct ieee802_1x_hdr *xhdr;
44 size_t len;
45 int encrypt = 0;
46
47 len = sizeof(*xhdr) + datalen;
48 buf = os_zalloc(len);
49 if (buf == NULL) {
50 wpa_printf(MSG_ERROR, "malloc() failed for "
51 "ieee802_1x_send(len=%lu)",
52 (unsigned long) len);
53 return;
54 }
55
56 xhdr = (struct ieee802_1x_hdr *) buf;
57 xhdr->version = hapd->conf->eapol_version;
58 xhdr->type = type;
59 xhdr->length = host_to_be16(datalen);
60
61 if (datalen > 0 && data != NULL)
62 os_memcpy(xhdr + 1, data, datalen);
63
64 if (wpa_auth_pairwise_set(sta->wpa_sm))
65 encrypt = 1;
66 if (sta->flags & WLAN_STA_PREAUTH) {
67 rsn_preauth_send(hapd, sta, buf, len);
68 } else {
69 hostapd_drv_hapd_send_eapol(
70 hapd, sta->addr, buf, len,
71 encrypt, hostapd_sta_flags_to_drv(sta->flags));
72 }
73
74 os_free(buf);
75 }
76
77
ieee802_1x_set_sta_authorized(struct hostapd_data * hapd,struct sta_info * sta,int authorized)78 void ieee802_1x_set_sta_authorized(struct hostapd_data *hapd,
79 struct sta_info *sta, int authorized)
80 {
81 int res;
82
83 if (sta->flags & WLAN_STA_PREAUTH)
84 return;
85
86 if (authorized) {
87 ap_sta_set_authorized(hapd, sta, 1);
88 res = hostapd_set_authorized(hapd, sta, 1);
89 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
90 HOSTAPD_LEVEL_DEBUG, "authorizing port");
91 } else {
92 ap_sta_set_authorized(hapd, sta, 0);
93 res = hostapd_set_authorized(hapd, sta, 0);
94 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
95 HOSTAPD_LEVEL_DEBUG, "unauthorizing port");
96 }
97
98 if (res && errno != ENOENT) {
99 printf("Could not set station " MACSTR " flags for kernel "
100 "driver (errno=%d).\n", MAC2STR(sta->addr), errno);
101 }
102
103 if (authorized) {
104 os_get_time(&sta->connected_time);
105 accounting_sta_start(hapd, sta);
106 }
107 }
108
109
ieee802_1x_tx_key_one(struct hostapd_data * hapd,struct sta_info * sta,int idx,int broadcast,u8 * key_data,size_t key_len)110 static void ieee802_1x_tx_key_one(struct hostapd_data *hapd,
111 struct sta_info *sta,
112 int idx, int broadcast,
113 u8 *key_data, size_t key_len)
114 {
115 u8 *buf, *ekey;
116 struct ieee802_1x_hdr *hdr;
117 struct ieee802_1x_eapol_key *key;
118 size_t len, ekey_len;
119 struct eapol_state_machine *sm = sta->eapol_sm;
120
121 if (sm == NULL)
122 return;
123
124 len = sizeof(*key) + key_len;
125 buf = os_zalloc(sizeof(*hdr) + len);
126 if (buf == NULL)
127 return;
128
129 hdr = (struct ieee802_1x_hdr *) buf;
130 key = (struct ieee802_1x_eapol_key *) (hdr + 1);
131 key->type = EAPOL_KEY_TYPE_RC4;
132 WPA_PUT_BE16(key->key_length, key_len);
133 wpa_get_ntp_timestamp(key->replay_counter);
134
135 if (random_get_bytes(key->key_iv, sizeof(key->key_iv))) {
136 wpa_printf(MSG_ERROR, "Could not get random numbers");
137 os_free(buf);
138 return;
139 }
140
141 key->key_index = idx | (broadcast ? 0 : BIT(7));
142 if (hapd->conf->eapol_key_index_workaround) {
143 /* According to some information, WinXP Supplicant seems to
144 * interpret bit7 as an indication whether the key is to be
145 * activated, so make it possible to enable workaround that
146 * sets this bit for all keys. */
147 key->key_index |= BIT(7);
148 }
149
150 /* Key is encrypted using "Key-IV + MSK[0..31]" as the RC4-key and
151 * MSK[32..63] is used to sign the message. */
152 if (sm->eap_if->eapKeyData == NULL || sm->eap_if->eapKeyDataLen < 64) {
153 wpa_printf(MSG_ERROR, "No eapKeyData available for encrypting "
154 "and signing EAPOL-Key");
155 os_free(buf);
156 return;
157 }
158 os_memcpy((u8 *) (key + 1), key_data, key_len);
159 ekey_len = sizeof(key->key_iv) + 32;
160 ekey = os_malloc(ekey_len);
161 if (ekey == NULL) {
162 wpa_printf(MSG_ERROR, "Could not encrypt key");
163 os_free(buf);
164 return;
165 }
166 os_memcpy(ekey, key->key_iv, sizeof(key->key_iv));
167 os_memcpy(ekey + sizeof(key->key_iv), sm->eap_if->eapKeyData, 32);
168 rc4_skip(ekey, ekey_len, 0, (u8 *) (key + 1), key_len);
169 os_free(ekey);
170
171 /* This header is needed here for HMAC-MD5, but it will be regenerated
172 * in ieee802_1x_send() */
173 hdr->version = hapd->conf->eapol_version;
174 hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
175 hdr->length = host_to_be16(len);
176 hmac_md5(sm->eap_if->eapKeyData + 32, 32, buf, sizeof(*hdr) + len,
177 key->key_signature);
178
179 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key to " MACSTR
180 " (%s index=%d)", MAC2STR(sm->addr),
181 broadcast ? "broadcast" : "unicast", idx);
182 ieee802_1x_send(hapd, sta, IEEE802_1X_TYPE_EAPOL_KEY, (u8 *) key, len);
183 if (sta->eapol_sm)
184 sta->eapol_sm->dot1xAuthEapolFramesTx++;
185 os_free(buf);
186 }
187
188
ieee802_1x_tx_key(struct hostapd_data * hapd,struct sta_info * sta)189 void ieee802_1x_tx_key(struct hostapd_data *hapd, struct sta_info *sta)
190 {
191 struct eapol_authenticator *eapol = hapd->eapol_auth;
192 struct eapol_state_machine *sm = sta->eapol_sm;
193
194 if (sm == NULL || !sm->eap_if->eapKeyData)
195 return;
196
197 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key(s) to " MACSTR,
198 MAC2STR(sta->addr));
199
200 #ifndef CONFIG_NO_VLAN
201 if (sta->vlan_id > 0 && sta->vlan_id <= MAX_VLAN_ID) {
202 wpa_printf(MSG_ERROR, "Using WEP with vlans is not supported.");
203 return;
204 }
205 #endif /* CONFIG_NO_VLAN */
206
207 if (eapol->default_wep_key) {
208 ieee802_1x_tx_key_one(hapd, sta, eapol->default_wep_key_idx, 1,
209 eapol->default_wep_key,
210 hapd->conf->default_wep_key_len);
211 }
212
213 if (hapd->conf->individual_wep_key_len > 0) {
214 u8 *ikey;
215 ikey = os_malloc(hapd->conf->individual_wep_key_len);
216 if (ikey == NULL ||
217 random_get_bytes(ikey, hapd->conf->individual_wep_key_len))
218 {
219 wpa_printf(MSG_ERROR, "Could not generate random "
220 "individual WEP key.");
221 os_free(ikey);
222 return;
223 }
224
225 wpa_hexdump_key(MSG_DEBUG, "Individual WEP key",
226 ikey, hapd->conf->individual_wep_key_len);
227
228 ieee802_1x_tx_key_one(hapd, sta, 0, 0, ikey,
229 hapd->conf->individual_wep_key_len);
230
231 /* TODO: set encryption in TX callback, i.e., only after STA
232 * has ACKed EAPOL-Key frame */
233 if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
234 sta->addr, 0, 1, NULL, 0, ikey,
235 hapd->conf->individual_wep_key_len)) {
236 wpa_printf(MSG_ERROR, "Could not set individual WEP "
237 "encryption.");
238 }
239
240 os_free(ikey);
241 }
242 }
243
244
radius_mode_txt(struct hostapd_data * hapd)245 const char *radius_mode_txt(struct hostapd_data *hapd)
246 {
247 switch (hapd->iface->conf->hw_mode) {
248 case HOSTAPD_MODE_IEEE80211AD:
249 return "802.11ad";
250 case HOSTAPD_MODE_IEEE80211A:
251 return "802.11a";
252 case HOSTAPD_MODE_IEEE80211G:
253 return "802.11g";
254 case HOSTAPD_MODE_IEEE80211B:
255 default:
256 return "802.11b";
257 }
258 }
259
260
radius_sta_rate(struct hostapd_data * hapd,struct sta_info * sta)261 int radius_sta_rate(struct hostapd_data *hapd, struct sta_info *sta)
262 {
263 int i;
264 u8 rate = 0;
265
266 for (i = 0; i < sta->supported_rates_len; i++)
267 if ((sta->supported_rates[i] & 0x7f) > rate)
268 rate = sta->supported_rates[i] & 0x7f;
269
270 return rate;
271 }
272
273
274 #ifndef CONFIG_NO_RADIUS
ieee802_1x_learn_identity(struct hostapd_data * hapd,struct eapol_state_machine * sm,const u8 * eap,size_t len)275 static void ieee802_1x_learn_identity(struct hostapd_data *hapd,
276 struct eapol_state_machine *sm,
277 const u8 *eap, size_t len)
278 {
279 const u8 *identity;
280 size_t identity_len;
281
282 if (len <= sizeof(struct eap_hdr) ||
283 eap[sizeof(struct eap_hdr)] != EAP_TYPE_IDENTITY)
284 return;
285
286 identity = eap_get_identity(sm->eap, &identity_len);
287 if (identity == NULL)
288 return;
289
290 /* Save station identity for future RADIUS packets */
291 os_free(sm->identity);
292 sm->identity = (u8 *) dup_binstr(identity, identity_len);
293 if (sm->identity == NULL) {
294 sm->identity_len = 0;
295 return;
296 }
297
298 sm->identity_len = identity_len;
299 hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
300 HOSTAPD_LEVEL_DEBUG, "STA identity '%s'", sm->identity);
301 sm->dot1xAuthEapolRespIdFramesRx++;
302 }
303
304
add_common_radius_sta_attr(struct hostapd_data * hapd,struct hostapd_radius_attr * req_attr,struct sta_info * sta,struct radius_msg * msg)305 static int add_common_radius_sta_attr(struct hostapd_data *hapd,
306 struct hostapd_radius_attr *req_attr,
307 struct sta_info *sta,
308 struct radius_msg *msg)
309 {
310 char buf[128];
311
312 if (!hostapd_config_get_radius_attr(req_attr,
313 RADIUS_ATTR_NAS_PORT) &&
314 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT, sta->aid)) {
315 wpa_printf(MSG_ERROR, "Could not add NAS-Port");
316 return -1;
317 }
318
319 os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
320 MAC2STR(sta->addr));
321 buf[sizeof(buf) - 1] = '\0';
322 if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID,
323 (u8 *) buf, os_strlen(buf))) {
324 wpa_printf(MSG_ERROR, "Could not add Calling-Station-Id");
325 return -1;
326 }
327
328 if (sta->flags & WLAN_STA_PREAUTH) {
329 os_strlcpy(buf, "IEEE 802.11i Pre-Authentication",
330 sizeof(buf));
331 } else {
332 os_snprintf(buf, sizeof(buf), "CONNECT %d%sMbps %s",
333 radius_sta_rate(hapd, sta) / 2,
334 (radius_sta_rate(hapd, sta) & 1) ? ".5" : "",
335 radius_mode_txt(hapd));
336 buf[sizeof(buf) - 1] = '\0';
337 }
338 if (!hostapd_config_get_radius_attr(req_attr,
339 RADIUS_ATTR_CONNECT_INFO) &&
340 !radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO,
341 (u8 *) buf, os_strlen(buf))) {
342 wpa_printf(MSG_ERROR, "Could not add Connect-Info");
343 return -1;
344 }
345
346 if (sta->acct_session_id_hi || sta->acct_session_id_lo) {
347 os_snprintf(buf, sizeof(buf), "%08X-%08X",
348 sta->acct_session_id_hi, sta->acct_session_id_lo);
349 if (!radius_msg_add_attr(msg, RADIUS_ATTR_ACCT_SESSION_ID,
350 (u8 *) buf, os_strlen(buf))) {
351 wpa_printf(MSG_ERROR, "Could not add Acct-Session-Id");
352 return -1;
353 }
354 }
355
356 return 0;
357 }
358
359
add_common_radius_attr(struct hostapd_data * hapd,struct hostapd_radius_attr * req_attr,struct sta_info * sta,struct radius_msg * msg)360 int add_common_radius_attr(struct hostapd_data *hapd,
361 struct hostapd_radius_attr *req_attr,
362 struct sta_info *sta,
363 struct radius_msg *msg)
364 {
365 char buf[128];
366 struct hostapd_radius_attr *attr;
367
368 if (!hostapd_config_get_radius_attr(req_attr,
369 RADIUS_ATTR_NAS_IP_ADDRESS) &&
370 hapd->conf->own_ip_addr.af == AF_INET &&
371 !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS,
372 (u8 *) &hapd->conf->own_ip_addr.u.v4, 4)) {
373 wpa_printf(MSG_ERROR, "Could not add NAS-IP-Address");
374 return -1;
375 }
376
377 #ifdef CONFIG_IPV6
378 if (!hostapd_config_get_radius_attr(req_attr,
379 RADIUS_ATTR_NAS_IPV6_ADDRESS) &&
380 hapd->conf->own_ip_addr.af == AF_INET6 &&
381 !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IPV6_ADDRESS,
382 (u8 *) &hapd->conf->own_ip_addr.u.v6, 16)) {
383 wpa_printf(MSG_ERROR, "Could not add NAS-IPv6-Address");
384 return -1;
385 }
386 #endif /* CONFIG_IPV6 */
387
388 if (!hostapd_config_get_radius_attr(req_attr,
389 RADIUS_ATTR_NAS_IDENTIFIER) &&
390 hapd->conf->nas_identifier &&
391 !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IDENTIFIER,
392 (u8 *) hapd->conf->nas_identifier,
393 os_strlen(hapd->conf->nas_identifier))) {
394 wpa_printf(MSG_ERROR, "Could not add NAS-Identifier");
395 return -1;
396 }
397
398 os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT ":%s",
399 MAC2STR(hapd->own_addr),
400 wpa_ssid_txt(hapd->conf->ssid.ssid,
401 hapd->conf->ssid.ssid_len));
402 buf[sizeof(buf) - 1] = '\0';
403 if (!hostapd_config_get_radius_attr(req_attr,
404 RADIUS_ATTR_CALLED_STATION_ID) &&
405 !radius_msg_add_attr(msg, RADIUS_ATTR_CALLED_STATION_ID,
406 (u8 *) buf, os_strlen(buf))) {
407 wpa_printf(MSG_ERROR, "Could not add Called-Station-Id");
408 return -1;
409 }
410
411 if (!hostapd_config_get_radius_attr(req_attr,
412 RADIUS_ATTR_NAS_PORT_TYPE) &&
413 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT_TYPE,
414 RADIUS_NAS_PORT_TYPE_IEEE_802_11)) {
415 wpa_printf(MSG_ERROR, "Could not add NAS-Port-Type");
416 return -1;
417 }
418
419 if (sta && add_common_radius_sta_attr(hapd, req_attr, sta, msg) < 0)
420 return -1;
421
422 for (attr = req_attr; attr; attr = attr->next) {
423 if (!radius_msg_add_attr(msg, attr->type,
424 wpabuf_head(attr->val),
425 wpabuf_len(attr->val))) {
426 wpa_printf(MSG_ERROR, "Could not add RADIUS "
427 "attribute");
428 return -1;
429 }
430 }
431
432 return 0;
433 }
434
435
ieee802_1x_encapsulate_radius(struct hostapd_data * hapd,struct sta_info * sta,const u8 * eap,size_t len)436 static void ieee802_1x_encapsulate_radius(struct hostapd_data *hapd,
437 struct sta_info *sta,
438 const u8 *eap, size_t len)
439 {
440 struct radius_msg *msg;
441 struct eapol_state_machine *sm = sta->eapol_sm;
442
443 if (sm == NULL)
444 return;
445
446 ieee802_1x_learn_identity(hapd, sm, eap, len);
447
448 wpa_printf(MSG_DEBUG, "Encapsulating EAP message into a RADIUS "
449 "packet");
450
451 sm->radius_identifier = radius_client_get_id(hapd->radius);
452 msg = radius_msg_new(RADIUS_CODE_ACCESS_REQUEST,
453 sm->radius_identifier);
454 if (msg == NULL) {
455 printf("Could not create net RADIUS packet\n");
456 return;
457 }
458
459 radius_msg_make_authenticator(msg, (u8 *) sta, sizeof(*sta));
460
461 if (sm->identity &&
462 !radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME,
463 sm->identity, sm->identity_len)) {
464 printf("Could not add User-Name\n");
465 goto fail;
466 }
467
468 if (add_common_radius_attr(hapd, hapd->conf->radius_auth_req_attr, sta,
469 msg) < 0)
470 goto fail;
471
472 /* TODO: should probably check MTU from driver config; 2304 is max for
473 * IEEE 802.11, but use 1400 to avoid problems with too large packets
474 */
475 if (!hostapd_config_get_radius_attr(hapd->conf->radius_auth_req_attr,
476 RADIUS_ATTR_FRAMED_MTU) &&
477 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_FRAMED_MTU, 1400)) {
478 printf("Could not add Framed-MTU\n");
479 goto fail;
480 }
481
482 if (eap && !radius_msg_add_eap(msg, eap, len)) {
483 printf("Could not add EAP-Message\n");
484 goto fail;
485 }
486
487 /* State attribute must be copied if and only if this packet is
488 * Access-Request reply to the previous Access-Challenge */
489 if (sm->last_recv_radius &&
490 radius_msg_get_hdr(sm->last_recv_radius)->code ==
491 RADIUS_CODE_ACCESS_CHALLENGE) {
492 int res = radius_msg_copy_attr(msg, sm->last_recv_radius,
493 RADIUS_ATTR_STATE);
494 if (res < 0) {
495 printf("Could not copy State attribute from previous "
496 "Access-Challenge\n");
497 goto fail;
498 }
499 if (res > 0) {
500 wpa_printf(MSG_DEBUG, "Copied RADIUS State Attribute");
501 }
502 }
503
504 if (hapd->conf->radius_request_cui) {
505 const u8 *cui;
506 size_t cui_len;
507 /* Add previously learned CUI or nul CUI to request CUI */
508 if (sm->radius_cui) {
509 cui = wpabuf_head(sm->radius_cui);
510 cui_len = wpabuf_len(sm->radius_cui);
511 } else {
512 cui = (const u8 *) "\0";
513 cui_len = 1;
514 }
515 if (!radius_msg_add_attr(msg,
516 RADIUS_ATTR_CHARGEABLE_USER_IDENTITY,
517 cui, cui_len)) {
518 wpa_printf(MSG_ERROR, "Could not add CUI");
519 goto fail;
520 }
521 }
522
523 if (radius_client_send(hapd->radius, msg, RADIUS_AUTH, sta->addr) < 0)
524 goto fail;
525
526 return;
527
528 fail:
529 radius_msg_free(msg);
530 }
531 #endif /* CONFIG_NO_RADIUS */
532
533
handle_eap_response(struct hostapd_data * hapd,struct sta_info * sta,struct eap_hdr * eap,size_t len)534 static void handle_eap_response(struct hostapd_data *hapd,
535 struct sta_info *sta, struct eap_hdr *eap,
536 size_t len)
537 {
538 u8 type, *data;
539 struct eapol_state_machine *sm = sta->eapol_sm;
540 if (sm == NULL)
541 return;
542
543 data = (u8 *) (eap + 1);
544
545 if (len < sizeof(*eap) + 1) {
546 printf("handle_eap_response: too short response data\n");
547 return;
548 }
549
550 sm->eap_type_supp = type = data[0];
551
552 hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
553 HOSTAPD_LEVEL_DEBUG, "received EAP packet (code=%d "
554 "id=%d len=%d) from STA: EAP Response-%s (%d)",
555 eap->code, eap->identifier, be_to_host16(eap->length),
556 eap_server_get_name(0, type), type);
557
558 sm->dot1xAuthEapolRespFramesRx++;
559
560 wpabuf_free(sm->eap_if->eapRespData);
561 sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len);
562 sm->eapolEap = TRUE;
563 }
564
565
566 /* Process incoming EAP packet from Supplicant */
handle_eap(struct hostapd_data * hapd,struct sta_info * sta,u8 * buf,size_t len)567 static void handle_eap(struct hostapd_data *hapd, struct sta_info *sta,
568 u8 *buf, size_t len)
569 {
570 struct eap_hdr *eap;
571 u16 eap_len;
572
573 if (len < sizeof(*eap)) {
574 printf(" too short EAP packet\n");
575 return;
576 }
577
578 eap = (struct eap_hdr *) buf;
579
580 eap_len = be_to_host16(eap->length);
581 wpa_printf(MSG_DEBUG, "EAP: code=%d identifier=%d length=%d",
582 eap->code, eap->identifier, eap_len);
583 if (eap_len < sizeof(*eap)) {
584 wpa_printf(MSG_DEBUG, " Invalid EAP length");
585 return;
586 } else if (eap_len > len) {
587 wpa_printf(MSG_DEBUG, " Too short frame to contain this EAP "
588 "packet");
589 return;
590 } else if (eap_len < len) {
591 wpa_printf(MSG_DEBUG, " Ignoring %lu extra bytes after EAP "
592 "packet", (unsigned long) len - eap_len);
593 }
594
595 switch (eap->code) {
596 case EAP_CODE_REQUEST:
597 wpa_printf(MSG_DEBUG, " (request)");
598 return;
599 case EAP_CODE_RESPONSE:
600 wpa_printf(MSG_DEBUG, " (response)");
601 handle_eap_response(hapd, sta, eap, eap_len);
602 break;
603 case EAP_CODE_SUCCESS:
604 wpa_printf(MSG_DEBUG, " (success)");
605 return;
606 case EAP_CODE_FAILURE:
607 wpa_printf(MSG_DEBUG, " (failure)");
608 return;
609 default:
610 wpa_printf(MSG_DEBUG, " (unknown code)");
611 return;
612 }
613 }
614
615
616 static struct eapol_state_machine *
ieee802_1x_alloc_eapol_sm(struct hostapd_data * hapd,struct sta_info * sta)617 ieee802_1x_alloc_eapol_sm(struct hostapd_data *hapd, struct sta_info *sta)
618 {
619 int flags = 0;
620 if (sta->flags & WLAN_STA_PREAUTH)
621 flags |= EAPOL_SM_PREAUTH;
622 if (sta->wpa_sm) {
623 flags |= EAPOL_SM_USES_WPA;
624 if (wpa_auth_sta_get_pmksa(sta->wpa_sm))
625 flags |= EAPOL_SM_FROM_PMKSA_CACHE;
626 }
627 return eapol_auth_alloc(hapd->eapol_auth, sta->addr, flags,
628 sta->wps_ie, sta->p2p_ie, sta,
629 sta->identity, sta->radius_cui);
630 }
631
632
633 /**
634 * ieee802_1x_receive - Process the EAPOL frames from the Supplicant
635 * @hapd: hostapd BSS data
636 * @sa: Source address (sender of the EAPOL frame)
637 * @buf: EAPOL frame
638 * @len: Length of buf in octets
639 *
640 * This function is called for each incoming EAPOL frame from the interface
641 */
ieee802_1x_receive(struct hostapd_data * hapd,const u8 * sa,const u8 * buf,size_t len)642 void ieee802_1x_receive(struct hostapd_data *hapd, const u8 *sa, const u8 *buf,
643 size_t len)
644 {
645 struct sta_info *sta;
646 struct ieee802_1x_hdr *hdr;
647 struct ieee802_1x_eapol_key *key;
648 u16 datalen;
649 struct rsn_pmksa_cache_entry *pmksa;
650 int key_mgmt;
651
652 if (!hapd->conf->ieee802_1x && !hapd->conf->wpa &&
653 !hapd->conf->wps_state)
654 return;
655
656 wpa_printf(MSG_DEBUG, "IEEE 802.1X: %lu bytes from " MACSTR,
657 (unsigned long) len, MAC2STR(sa));
658 sta = ap_get_sta(hapd, sa);
659 if (!sta || (!(sta->flags & (WLAN_STA_ASSOC | WLAN_STA_PREAUTH)) &&
660 !(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_WIRED))) {
661 wpa_printf(MSG_DEBUG, "IEEE 802.1X data frame from not "
662 "associated/Pre-authenticating STA");
663 return;
664 }
665
666 if (len < sizeof(*hdr)) {
667 printf(" too short IEEE 802.1X packet\n");
668 return;
669 }
670
671 hdr = (struct ieee802_1x_hdr *) buf;
672 datalen = be_to_host16(hdr->length);
673 wpa_printf(MSG_DEBUG, " IEEE 802.1X: version=%d type=%d length=%d",
674 hdr->version, hdr->type, datalen);
675
676 if (len - sizeof(*hdr) < datalen) {
677 printf(" frame too short for this IEEE 802.1X packet\n");
678 if (sta->eapol_sm)
679 sta->eapol_sm->dot1xAuthEapLengthErrorFramesRx++;
680 return;
681 }
682 if (len - sizeof(*hdr) > datalen) {
683 wpa_printf(MSG_DEBUG, " ignoring %lu extra octets after "
684 "IEEE 802.1X packet",
685 (unsigned long) len - sizeof(*hdr) - datalen);
686 }
687
688 if (sta->eapol_sm) {
689 sta->eapol_sm->dot1xAuthLastEapolFrameVersion = hdr->version;
690 sta->eapol_sm->dot1xAuthEapolFramesRx++;
691 }
692
693 key = (struct ieee802_1x_eapol_key *) (hdr + 1);
694 if (datalen >= sizeof(struct ieee802_1x_eapol_key) &&
695 hdr->type == IEEE802_1X_TYPE_EAPOL_KEY &&
696 (key->type == EAPOL_KEY_TYPE_WPA ||
697 key->type == EAPOL_KEY_TYPE_RSN)) {
698 wpa_receive(hapd->wpa_auth, sta->wpa_sm, (u8 *) hdr,
699 sizeof(*hdr) + datalen);
700 return;
701 }
702
703 if (!hapd->conf->ieee802_1x &&
704 !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) {
705 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore EAPOL message - "
706 "802.1X not enabled and WPS not used");
707 return;
708 }
709
710 key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm);
711 if (key_mgmt != -1 && wpa_key_mgmt_wpa_psk(key_mgmt)) {
712 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore EAPOL message - "
713 "STA is using PSK");
714 return;
715 }
716
717 if (!sta->eapol_sm) {
718 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
719 if (!sta->eapol_sm)
720 return;
721
722 #ifdef CONFIG_WPS
723 if (!hapd->conf->ieee802_1x) {
724 u32 wflags = sta->flags & (WLAN_STA_WPS |
725 WLAN_STA_WPS2 |
726 WLAN_STA_MAYBE_WPS);
727 if (wflags == WLAN_STA_MAYBE_WPS ||
728 wflags == (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) {
729 /*
730 * Delay EAPOL frame transmission until a
731 * possible WPS STA initiates the handshake
732 * with EAPOL-Start. Only allow the wait to be
733 * skipped if the STA is known to support WPS
734 * 2.0.
735 */
736 wpa_printf(MSG_DEBUG, "WPS: Do not start "
737 "EAPOL until EAPOL-Start is "
738 "received");
739 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
740 }
741 }
742 #endif /* CONFIG_WPS */
743
744 sta->eapol_sm->eap_if->portEnabled = TRUE;
745 }
746
747 /* since we support version 1, we can ignore version field and proceed
748 * as specified in version 1 standard [IEEE Std 802.1X-2001, 7.5.5] */
749 /* TODO: actually, we are not version 1 anymore.. However, Version 2
750 * does not change frame contents, so should be ok to process frames
751 * more or less identically. Some changes might be needed for
752 * verification of fields. */
753
754 switch (hdr->type) {
755 case IEEE802_1X_TYPE_EAP_PACKET:
756 handle_eap(hapd, sta, (u8 *) (hdr + 1), datalen);
757 break;
758
759 case IEEE802_1X_TYPE_EAPOL_START:
760 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
761 HOSTAPD_LEVEL_DEBUG, "received EAPOL-Start "
762 "from STA");
763 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
764 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
765 if (pmksa) {
766 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
767 HOSTAPD_LEVEL_DEBUG, "cached PMKSA "
768 "available - ignore it since "
769 "STA sent EAPOL-Start");
770 wpa_auth_sta_clear_pmksa(sta->wpa_sm, pmksa);
771 }
772 sta->eapol_sm->eapolStart = TRUE;
773 sta->eapol_sm->dot1xAuthEapolStartFramesRx++;
774 eap_server_clear_identity(sta->eapol_sm->eap);
775 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
776 break;
777
778 case IEEE802_1X_TYPE_EAPOL_LOGOFF:
779 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
780 HOSTAPD_LEVEL_DEBUG, "received EAPOL-Logoff "
781 "from STA");
782 sta->acct_terminate_cause =
783 RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
784 accounting_sta_stop(hapd, sta);
785 sta->eapol_sm->eapolLogoff = TRUE;
786 sta->eapol_sm->dot1xAuthEapolLogoffFramesRx++;
787 eap_server_clear_identity(sta->eapol_sm->eap);
788 break;
789
790 case IEEE802_1X_TYPE_EAPOL_KEY:
791 wpa_printf(MSG_DEBUG, " EAPOL-Key");
792 if (!ap_sta_is_authorized(sta)) {
793 wpa_printf(MSG_DEBUG, " Dropped key data from "
794 "unauthorized Supplicant");
795 break;
796 }
797 break;
798
799 case IEEE802_1X_TYPE_EAPOL_ENCAPSULATED_ASF_ALERT:
800 wpa_printf(MSG_DEBUG, " EAPOL-Encapsulated-ASF-Alert");
801 /* TODO: implement support for this; show data */
802 break;
803
804 default:
805 wpa_printf(MSG_DEBUG, " unknown IEEE 802.1X packet type");
806 sta->eapol_sm->dot1xAuthInvalidEapolFramesRx++;
807 break;
808 }
809
810 eapol_auth_step(sta->eapol_sm);
811 }
812
813
814 /**
815 * ieee802_1x_new_station - Start IEEE 802.1X authentication
816 * @hapd: hostapd BSS data
817 * @sta: The station
818 *
819 * This function is called to start IEEE 802.1X authentication when a new
820 * station completes IEEE 802.11 association.
821 */
ieee802_1x_new_station(struct hostapd_data * hapd,struct sta_info * sta)822 void ieee802_1x_new_station(struct hostapd_data *hapd, struct sta_info *sta)
823 {
824 struct rsn_pmksa_cache_entry *pmksa;
825 int reassoc = 1;
826 int force_1x = 0;
827 int key_mgmt;
828
829 #ifdef CONFIG_WPS
830 if (hapd->conf->wps_state && hapd->conf->wpa &&
831 (sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) {
832 /*
833 * Need to enable IEEE 802.1X/EAPOL state machines for possible
834 * WPS handshake even if IEEE 802.1X/EAPOL is not used for
835 * authentication in this BSS.
836 */
837 force_1x = 1;
838 }
839 #endif /* CONFIG_WPS */
840
841 if (!force_1x && !hapd->conf->ieee802_1x) {
842 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - "
843 "802.1X not enabled or forced for WPS");
844 /*
845 * Clear any possible EAPOL authenticator state to support
846 * reassociation change from WPS to PSK.
847 */
848 ieee802_1x_free_station(sta);
849 return;
850 }
851
852 key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm);
853 if (key_mgmt != -1 && wpa_key_mgmt_wpa_psk(key_mgmt)) {
854 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - using PSK");
855 /*
856 * Clear any possible EAPOL authenticator state to support
857 * reassociation change from WPA-EAP to PSK.
858 */
859 ieee802_1x_free_station(sta);
860 return;
861 }
862
863 if (sta->eapol_sm == NULL) {
864 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
865 HOSTAPD_LEVEL_DEBUG, "start authentication");
866 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
867 if (sta->eapol_sm == NULL) {
868 hostapd_logger(hapd, sta->addr,
869 HOSTAPD_MODULE_IEEE8021X,
870 HOSTAPD_LEVEL_INFO,
871 "failed to allocate state machine");
872 return;
873 }
874 reassoc = 0;
875 }
876
877 #ifdef CONFIG_WPS
878 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
879 if (!hapd->conf->ieee802_1x && !(sta->flags & WLAN_STA_WPS2)) {
880 /*
881 * Delay EAPOL frame transmission until a possible WPS STA
882 * initiates the handshake with EAPOL-Start. Only allow the
883 * wait to be skipped if the STA is known to support WPS 2.0.
884 */
885 wpa_printf(MSG_DEBUG, "WPS: Do not start EAPOL until "
886 "EAPOL-Start is received");
887 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
888 }
889 #endif /* CONFIG_WPS */
890
891 sta->eapol_sm->eap_if->portEnabled = TRUE;
892
893 #ifdef CONFIG_IEEE80211R
894 if (sta->auth_alg == WLAN_AUTH_FT) {
895 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
896 HOSTAPD_LEVEL_DEBUG,
897 "PMK from FT - skip IEEE 802.1X/EAP");
898 /* Setup EAPOL state machines to already authenticated state
899 * because of existing FT information from R0KH. */
900 sta->eapol_sm->keyRun = TRUE;
901 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
902 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
903 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
904 sta->eapol_sm->authSuccess = TRUE;
905 sta->eapol_sm->authFail = FALSE;
906 if (sta->eapol_sm->eap)
907 eap_sm_notify_cached(sta->eapol_sm->eap);
908 /* TODO: get vlan_id from R0KH using RRB message */
909 return;
910 }
911 #endif /* CONFIG_IEEE80211R */
912
913 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
914 if (pmksa) {
915 int old_vlanid;
916
917 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
918 HOSTAPD_LEVEL_DEBUG,
919 "PMK from PMKSA cache - skip IEEE 802.1X/EAP");
920 /* Setup EAPOL state machines to already authenticated state
921 * because of existing PMKSA information in the cache. */
922 sta->eapol_sm->keyRun = TRUE;
923 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
924 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
925 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
926 sta->eapol_sm->authSuccess = TRUE;
927 sta->eapol_sm->authFail = FALSE;
928 if (sta->eapol_sm->eap)
929 eap_sm_notify_cached(sta->eapol_sm->eap);
930 old_vlanid = sta->vlan_id;
931 pmksa_cache_to_eapol_data(pmksa, sta->eapol_sm);
932 if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
933 sta->vlan_id = 0;
934 ap_sta_bind_vlan(hapd, sta, old_vlanid);
935 } else {
936 if (reassoc) {
937 /*
938 * Force EAPOL state machines to start
939 * re-authentication without having to wait for the
940 * Supplicant to send EAPOL-Start.
941 */
942 sta->eapol_sm->reAuthenticate = TRUE;
943 }
944 eapol_auth_step(sta->eapol_sm);
945 }
946 }
947
948
ieee802_1x_free_station(struct sta_info * sta)949 void ieee802_1x_free_station(struct sta_info *sta)
950 {
951 struct eapol_state_machine *sm = sta->eapol_sm;
952
953 if (sm == NULL)
954 return;
955
956 sta->eapol_sm = NULL;
957
958 #ifndef CONFIG_NO_RADIUS
959 radius_msg_free(sm->last_recv_radius);
960 radius_free_class(&sm->radius_class);
961 wpabuf_free(sm->radius_cui);
962 #endif /* CONFIG_NO_RADIUS */
963
964 os_free(sm->identity);
965 eapol_auth_free(sm);
966 }
967
968
969 #ifndef CONFIG_NO_RADIUS
ieee802_1x_decapsulate_radius(struct hostapd_data * hapd,struct sta_info * sta)970 static void ieee802_1x_decapsulate_radius(struct hostapd_data *hapd,
971 struct sta_info *sta)
972 {
973 struct wpabuf *eap;
974 const struct eap_hdr *hdr;
975 int eap_type = -1;
976 char buf[64];
977 struct radius_msg *msg;
978 struct eapol_state_machine *sm = sta->eapol_sm;
979
980 if (sm == NULL || sm->last_recv_radius == NULL) {
981 if (sm)
982 sm->eap_if->aaaEapNoReq = TRUE;
983 return;
984 }
985
986 msg = sm->last_recv_radius;
987
988 eap = radius_msg_get_eap(msg);
989 if (eap == NULL) {
990 /* RFC 3579, Chap. 2.6.3:
991 * RADIUS server SHOULD NOT send Access-Reject/no EAP-Message
992 * attribute */
993 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
994 HOSTAPD_LEVEL_WARNING, "could not extract "
995 "EAP-Message from RADIUS message");
996 sm->eap_if->aaaEapNoReq = TRUE;
997 return;
998 }
999
1000 if (wpabuf_len(eap) < sizeof(*hdr)) {
1001 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1002 HOSTAPD_LEVEL_WARNING, "too short EAP packet "
1003 "received from authentication server");
1004 wpabuf_free(eap);
1005 sm->eap_if->aaaEapNoReq = TRUE;
1006 return;
1007 }
1008
1009 if (wpabuf_len(eap) > sizeof(*hdr))
1010 eap_type = (wpabuf_head_u8(eap))[sizeof(*hdr)];
1011
1012 hdr = wpabuf_head(eap);
1013 switch (hdr->code) {
1014 case EAP_CODE_REQUEST:
1015 if (eap_type >= 0)
1016 sm->eap_type_authsrv = eap_type;
1017 os_snprintf(buf, sizeof(buf), "EAP-Request-%s (%d)",
1018 eap_type >= 0 ? eap_server_get_name(0, eap_type) :
1019 "??",
1020 eap_type);
1021 break;
1022 case EAP_CODE_RESPONSE:
1023 os_snprintf(buf, sizeof(buf), "EAP Response-%s (%d)",
1024 eap_type >= 0 ? eap_server_get_name(0, eap_type) :
1025 "??",
1026 eap_type);
1027 break;
1028 case EAP_CODE_SUCCESS:
1029 os_strlcpy(buf, "EAP Success", sizeof(buf));
1030 break;
1031 case EAP_CODE_FAILURE:
1032 os_strlcpy(buf, "EAP Failure", sizeof(buf));
1033 break;
1034 default:
1035 os_strlcpy(buf, "unknown EAP code", sizeof(buf));
1036 break;
1037 }
1038 buf[sizeof(buf) - 1] = '\0';
1039 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1040 HOSTAPD_LEVEL_DEBUG, "decapsulated EAP packet (code=%d "
1041 "id=%d len=%d) from RADIUS server: %s",
1042 hdr->code, hdr->identifier, be_to_host16(hdr->length),
1043 buf);
1044 sm->eap_if->aaaEapReq = TRUE;
1045
1046 wpabuf_free(sm->eap_if->aaaEapReqData);
1047 sm->eap_if->aaaEapReqData = eap;
1048 }
1049
1050
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)1051 static void ieee802_1x_get_keys(struct hostapd_data *hapd,
1052 struct sta_info *sta, struct radius_msg *msg,
1053 struct radius_msg *req,
1054 const u8 *shared_secret,
1055 size_t shared_secret_len)
1056 {
1057 struct radius_ms_mppe_keys *keys;
1058 struct eapol_state_machine *sm = sta->eapol_sm;
1059 if (sm == NULL)
1060 return;
1061
1062 keys = radius_msg_get_ms_keys(msg, req, shared_secret,
1063 shared_secret_len);
1064
1065 if (keys && keys->send && keys->recv) {
1066 size_t len = keys->send_len + keys->recv_len;
1067 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Send-Key",
1068 keys->send, keys->send_len);
1069 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Recv-Key",
1070 keys->recv, keys->recv_len);
1071
1072 os_free(sm->eap_if->aaaEapKeyData);
1073 sm->eap_if->aaaEapKeyData = os_malloc(len);
1074 if (sm->eap_if->aaaEapKeyData) {
1075 os_memcpy(sm->eap_if->aaaEapKeyData, keys->recv,
1076 keys->recv_len);
1077 os_memcpy(sm->eap_if->aaaEapKeyData + keys->recv_len,
1078 keys->send, keys->send_len);
1079 sm->eap_if->aaaEapKeyDataLen = len;
1080 sm->eap_if->aaaEapKeyAvailable = TRUE;
1081 }
1082 }
1083
1084 if (keys) {
1085 os_free(keys->send);
1086 os_free(keys->recv);
1087 os_free(keys);
1088 }
1089 }
1090
1091
ieee802_1x_store_radius_class(struct hostapd_data * hapd,struct sta_info * sta,struct radius_msg * msg)1092 static void ieee802_1x_store_radius_class(struct hostapd_data *hapd,
1093 struct sta_info *sta,
1094 struct radius_msg *msg)
1095 {
1096 u8 *class;
1097 size_t class_len;
1098 struct eapol_state_machine *sm = sta->eapol_sm;
1099 int count, i;
1100 struct radius_attr_data *nclass;
1101 size_t nclass_count;
1102
1103 if (!hapd->conf->radius->acct_server || hapd->radius == NULL ||
1104 sm == NULL)
1105 return;
1106
1107 radius_free_class(&sm->radius_class);
1108 count = radius_msg_count_attr(msg, RADIUS_ATTR_CLASS, 1);
1109 if (count <= 0)
1110 return;
1111
1112 nclass = os_calloc(count, sizeof(struct radius_attr_data));
1113 if (nclass == NULL)
1114 return;
1115
1116 nclass_count = 0;
1117
1118 class = NULL;
1119 for (i = 0; i < count; i++) {
1120 do {
1121 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CLASS,
1122 &class, &class_len,
1123 class) < 0) {
1124 i = count;
1125 break;
1126 }
1127 } while (class_len < 1);
1128
1129 nclass[nclass_count].data = os_malloc(class_len);
1130 if (nclass[nclass_count].data == NULL)
1131 break;
1132
1133 os_memcpy(nclass[nclass_count].data, class, class_len);
1134 nclass[nclass_count].len = class_len;
1135 nclass_count++;
1136 }
1137
1138 sm->radius_class.attr = nclass;
1139 sm->radius_class.count = nclass_count;
1140 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Stored %lu RADIUS Class "
1141 "attributes for " MACSTR,
1142 (unsigned long) sm->radius_class.count,
1143 MAC2STR(sta->addr));
1144 }
1145
1146
1147 /* 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)1148 static void ieee802_1x_update_sta_identity(struct hostapd_data *hapd,
1149 struct sta_info *sta,
1150 struct radius_msg *msg)
1151 {
1152 u8 *buf, *identity;
1153 size_t len;
1154 struct eapol_state_machine *sm = sta->eapol_sm;
1155
1156 if (sm == NULL)
1157 return;
1158
1159 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_USER_NAME, &buf, &len,
1160 NULL) < 0)
1161 return;
1162
1163 identity = (u8 *) dup_binstr(buf, len);
1164 if (identity == NULL)
1165 return;
1166
1167 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1168 HOSTAPD_LEVEL_DEBUG, "old identity '%s' updated with "
1169 "User-Name from Access-Accept '%s'",
1170 sm->identity ? (char *) sm->identity : "N/A",
1171 (char *) identity);
1172
1173 os_free(sm->identity);
1174 sm->identity = identity;
1175 sm->identity_len = len;
1176 }
1177
1178
1179 /* 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)1180 static void ieee802_1x_update_sta_cui(struct hostapd_data *hapd,
1181 struct sta_info *sta,
1182 struct radius_msg *msg)
1183 {
1184 struct eapol_state_machine *sm = sta->eapol_sm;
1185 struct wpabuf *cui;
1186 u8 *buf;
1187 size_t len;
1188
1189 if (sm == NULL)
1190 return;
1191
1192 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CHARGEABLE_USER_IDENTITY,
1193 &buf, &len, NULL) < 0)
1194 return;
1195
1196 cui = wpabuf_alloc_copy(buf, len);
1197 if (cui == NULL)
1198 return;
1199
1200 wpabuf_free(sm->radius_cui);
1201 sm->radius_cui = cui;
1202 }
1203
1204
1205 struct sta_id_search {
1206 u8 identifier;
1207 struct eapol_state_machine *sm;
1208 };
1209
1210
ieee802_1x_select_radius_identifier(struct hostapd_data * hapd,struct sta_info * sta,void * ctx)1211 static int ieee802_1x_select_radius_identifier(struct hostapd_data *hapd,
1212 struct sta_info *sta,
1213 void *ctx)
1214 {
1215 struct sta_id_search *id_search = ctx;
1216 struct eapol_state_machine *sm = sta->eapol_sm;
1217
1218 if (sm && sm->radius_identifier >= 0 &&
1219 sm->radius_identifier == id_search->identifier) {
1220 id_search->sm = sm;
1221 return 1;
1222 }
1223 return 0;
1224 }
1225
1226
1227 static struct eapol_state_machine *
ieee802_1x_search_radius_identifier(struct hostapd_data * hapd,u8 identifier)1228 ieee802_1x_search_radius_identifier(struct hostapd_data *hapd, u8 identifier)
1229 {
1230 struct sta_id_search id_search;
1231 id_search.identifier = identifier;
1232 id_search.sm = NULL;
1233 ap_for_each_sta(hapd, ieee802_1x_select_radius_identifier, &id_search);
1234 return id_search.sm;
1235 }
1236
1237
1238 /**
1239 * ieee802_1x_receive_auth - Process RADIUS frames from Authentication Server
1240 * @msg: RADIUS response message
1241 * @req: RADIUS request message
1242 * @shared_secret: RADIUS shared secret
1243 * @shared_secret_len: Length of shared_secret in octets
1244 * @data: Context data (struct hostapd_data *)
1245 * Returns: Processing status
1246 */
1247 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)1248 ieee802_1x_receive_auth(struct radius_msg *msg, struct radius_msg *req,
1249 const u8 *shared_secret, size_t shared_secret_len,
1250 void *data)
1251 {
1252 struct hostapd_data *hapd = data;
1253 struct sta_info *sta;
1254 u32 session_timeout = 0, termination_action, acct_interim_interval;
1255 int session_timeout_set, old_vlanid = 0;
1256 struct eapol_state_machine *sm;
1257 int override_eapReq = 0;
1258 struct radius_hdr *hdr = radius_msg_get_hdr(msg);
1259
1260 sm = ieee802_1x_search_radius_identifier(hapd, hdr->identifier);
1261 if (sm == NULL) {
1262 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Could not find matching "
1263 "station for this RADIUS message");
1264 return RADIUS_RX_UNKNOWN;
1265 }
1266 sta = sm->sta;
1267
1268 /* RFC 2869, Ch. 5.13: valid Message-Authenticator attribute MUST be
1269 * present when packet contains an EAP-Message attribute */
1270 if (hdr->code == RADIUS_CODE_ACCESS_REJECT &&
1271 radius_msg_get_attr(msg, RADIUS_ATTR_MESSAGE_AUTHENTICATOR, NULL,
1272 0) < 0 &&
1273 radius_msg_get_attr(msg, RADIUS_ATTR_EAP_MESSAGE, NULL, 0) < 0) {
1274 wpa_printf(MSG_DEBUG, "Allowing RADIUS Access-Reject without "
1275 "Message-Authenticator since it does not include "
1276 "EAP-Message");
1277 } else if (radius_msg_verify(msg, shared_secret, shared_secret_len,
1278 req, 1)) {
1279 printf("Incoming RADIUS packet did not have correct "
1280 "Message-Authenticator - dropped\n");
1281 return RADIUS_RX_INVALID_AUTHENTICATOR;
1282 }
1283
1284 if (hdr->code != RADIUS_CODE_ACCESS_ACCEPT &&
1285 hdr->code != RADIUS_CODE_ACCESS_REJECT &&
1286 hdr->code != RADIUS_CODE_ACCESS_CHALLENGE) {
1287 printf("Unknown RADIUS message code\n");
1288 return RADIUS_RX_UNKNOWN;
1289 }
1290
1291 sm->radius_identifier = -1;
1292 wpa_printf(MSG_DEBUG, "RADIUS packet matching with station " MACSTR,
1293 MAC2STR(sta->addr));
1294
1295 radius_msg_free(sm->last_recv_radius);
1296 sm->last_recv_radius = msg;
1297
1298 session_timeout_set =
1299 !radius_msg_get_attr_int32(msg, RADIUS_ATTR_SESSION_TIMEOUT,
1300 &session_timeout);
1301 if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_TERMINATION_ACTION,
1302 &termination_action))
1303 termination_action = RADIUS_TERMINATION_ACTION_DEFAULT;
1304
1305 if (hapd->conf->acct_interim_interval == 0 &&
1306 hdr->code == RADIUS_CODE_ACCESS_ACCEPT &&
1307 radius_msg_get_attr_int32(msg, RADIUS_ATTR_ACCT_INTERIM_INTERVAL,
1308 &acct_interim_interval) == 0) {
1309 if (acct_interim_interval < 60) {
1310 hostapd_logger(hapd, sta->addr,
1311 HOSTAPD_MODULE_IEEE8021X,
1312 HOSTAPD_LEVEL_INFO,
1313 "ignored too small "
1314 "Acct-Interim-Interval %d",
1315 acct_interim_interval);
1316 } else
1317 sta->acct_interim_interval = acct_interim_interval;
1318 }
1319
1320
1321 switch (hdr->code) {
1322 case RADIUS_CODE_ACCESS_ACCEPT:
1323 if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
1324 sta->vlan_id = 0;
1325 #ifndef CONFIG_NO_VLAN
1326 else {
1327 old_vlanid = sta->vlan_id;
1328 sta->vlan_id = radius_msg_get_vlanid(msg);
1329 }
1330 if (sta->vlan_id > 0 &&
1331 hostapd_vlan_id_valid(hapd->conf->vlan, sta->vlan_id)) {
1332 hostapd_logger(hapd, sta->addr,
1333 HOSTAPD_MODULE_RADIUS,
1334 HOSTAPD_LEVEL_INFO,
1335 "VLAN ID %d", sta->vlan_id);
1336 } else if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_REQUIRED) {
1337 sta->eapol_sm->authFail = TRUE;
1338 hostapd_logger(hapd, sta->addr,
1339 HOSTAPD_MODULE_IEEE8021X,
1340 HOSTAPD_LEVEL_INFO, "authentication "
1341 "server did not include required VLAN "
1342 "ID in Access-Accept");
1343 break;
1344 }
1345 #endif /* CONFIG_NO_VLAN */
1346
1347 if (ap_sta_bind_vlan(hapd, sta, old_vlanid) < 0)
1348 break;
1349
1350 /* RFC 3580, Ch. 3.17 */
1351 if (session_timeout_set && termination_action ==
1352 RADIUS_TERMINATION_ACTION_RADIUS_REQUEST) {
1353 sm->reAuthPeriod = session_timeout;
1354 } else if (session_timeout_set)
1355 ap_sta_session_timeout(hapd, sta, session_timeout);
1356
1357 sm->eap_if->aaaSuccess = TRUE;
1358 override_eapReq = 1;
1359 ieee802_1x_get_keys(hapd, sta, msg, req, shared_secret,
1360 shared_secret_len);
1361 ieee802_1x_store_radius_class(hapd, sta, msg);
1362 ieee802_1x_update_sta_identity(hapd, sta, msg);
1363 ieee802_1x_update_sta_cui(hapd, sta, msg);
1364 if (sm->eap_if->eapKeyAvailable &&
1365 wpa_auth_pmksa_add(sta->wpa_sm, sm->eapol_key_crypt,
1366 session_timeout_set ?
1367 (int) session_timeout : -1, sm) == 0) {
1368 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
1369 HOSTAPD_LEVEL_DEBUG,
1370 "Added PMKSA cache entry");
1371 }
1372 break;
1373 case RADIUS_CODE_ACCESS_REJECT:
1374 sm->eap_if->aaaFail = TRUE;
1375 override_eapReq = 1;
1376 break;
1377 case RADIUS_CODE_ACCESS_CHALLENGE:
1378 sm->eap_if->aaaEapReq = TRUE;
1379 if (session_timeout_set) {
1380 /* RFC 2869, Ch. 2.3.2; RFC 3580, Ch. 3.17 */
1381 sm->eap_if->aaaMethodTimeout = session_timeout;
1382 hostapd_logger(hapd, sm->addr,
1383 HOSTAPD_MODULE_IEEE8021X,
1384 HOSTAPD_LEVEL_DEBUG,
1385 "using EAP timeout of %d seconds (from "
1386 "RADIUS)",
1387 sm->eap_if->aaaMethodTimeout);
1388 } else {
1389 /*
1390 * Use dynamic retransmission behavior per EAP
1391 * specification.
1392 */
1393 sm->eap_if->aaaMethodTimeout = 0;
1394 }
1395 break;
1396 }
1397
1398 ieee802_1x_decapsulate_radius(hapd, sta);
1399 if (override_eapReq)
1400 sm->eap_if->aaaEapReq = FALSE;
1401
1402 eapol_auth_step(sm);
1403
1404 return RADIUS_RX_QUEUED;
1405 }
1406 #endif /* CONFIG_NO_RADIUS */
1407
1408
ieee802_1x_abort_auth(struct hostapd_data * hapd,struct sta_info * sta)1409 void ieee802_1x_abort_auth(struct hostapd_data *hapd, struct sta_info *sta)
1410 {
1411 struct eapol_state_machine *sm = sta->eapol_sm;
1412 if (sm == NULL)
1413 return;
1414
1415 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1416 HOSTAPD_LEVEL_DEBUG, "aborting authentication");
1417
1418 #ifndef CONFIG_NO_RADIUS
1419 radius_msg_free(sm->last_recv_radius);
1420 sm->last_recv_radius = NULL;
1421 #endif /* CONFIG_NO_RADIUS */
1422
1423 if (sm->eap_if->eapTimeout) {
1424 /*
1425 * Disconnect the STA since it did not reply to the last EAP
1426 * request and we cannot continue EAP processing (EAP-Failure
1427 * could only be sent if the EAP peer actually replied).
1428 */
1429 wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "EAP Timeout, STA " MACSTR,
1430 MAC2STR(sta->addr));
1431
1432 sm->eap_if->portEnabled = FALSE;
1433 ap_sta_disconnect(hapd, sta, sta->addr,
1434 WLAN_REASON_PREV_AUTH_NOT_VALID);
1435 }
1436 }
1437
1438
ieee802_1x_rekey_broadcast(struct hostapd_data * hapd)1439 static int ieee802_1x_rekey_broadcast(struct hostapd_data *hapd)
1440 {
1441 struct eapol_authenticator *eapol = hapd->eapol_auth;
1442
1443 if (hapd->conf->default_wep_key_len < 1)
1444 return 0;
1445
1446 os_free(eapol->default_wep_key);
1447 eapol->default_wep_key = os_malloc(hapd->conf->default_wep_key_len);
1448 if (eapol->default_wep_key == NULL ||
1449 random_get_bytes(eapol->default_wep_key,
1450 hapd->conf->default_wep_key_len)) {
1451 printf("Could not generate random WEP key.\n");
1452 os_free(eapol->default_wep_key);
1453 eapol->default_wep_key = NULL;
1454 return -1;
1455 }
1456
1457 wpa_hexdump_key(MSG_DEBUG, "IEEE 802.1X: New default WEP key",
1458 eapol->default_wep_key,
1459 hapd->conf->default_wep_key_len);
1460
1461 return 0;
1462 }
1463
1464
ieee802_1x_sta_key_available(struct hostapd_data * hapd,struct sta_info * sta,void * ctx)1465 static int ieee802_1x_sta_key_available(struct hostapd_data *hapd,
1466 struct sta_info *sta, void *ctx)
1467 {
1468 if (sta->eapol_sm) {
1469 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
1470 eapol_auth_step(sta->eapol_sm);
1471 }
1472 return 0;
1473 }
1474
1475
ieee802_1x_rekey(void * eloop_ctx,void * timeout_ctx)1476 static void ieee802_1x_rekey(void *eloop_ctx, void *timeout_ctx)
1477 {
1478 struct hostapd_data *hapd = eloop_ctx;
1479 struct eapol_authenticator *eapol = hapd->eapol_auth;
1480
1481 if (eapol->default_wep_key_idx >= 3)
1482 eapol->default_wep_key_idx =
1483 hapd->conf->individual_wep_key_len > 0 ? 1 : 0;
1484 else
1485 eapol->default_wep_key_idx++;
1486
1487 wpa_printf(MSG_DEBUG, "IEEE 802.1X: New default WEP key index %d",
1488 eapol->default_wep_key_idx);
1489
1490 if (ieee802_1x_rekey_broadcast(hapd)) {
1491 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1492 HOSTAPD_LEVEL_WARNING, "failed to generate a "
1493 "new broadcast key");
1494 os_free(eapol->default_wep_key);
1495 eapol->default_wep_key = NULL;
1496 return;
1497 }
1498
1499 /* TODO: Could setup key for RX here, but change default TX keyid only
1500 * after new broadcast key has been sent to all stations. */
1501 if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
1502 broadcast_ether_addr,
1503 eapol->default_wep_key_idx, 1, NULL, 0,
1504 eapol->default_wep_key,
1505 hapd->conf->default_wep_key_len)) {
1506 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1507 HOSTAPD_LEVEL_WARNING, "failed to configure a "
1508 "new broadcast key");
1509 os_free(eapol->default_wep_key);
1510 eapol->default_wep_key = NULL;
1511 return;
1512 }
1513
1514 ap_for_each_sta(hapd, ieee802_1x_sta_key_available, NULL);
1515
1516 if (hapd->conf->wep_rekeying_period > 0) {
1517 eloop_register_timeout(hapd->conf->wep_rekeying_period, 0,
1518 ieee802_1x_rekey, hapd, NULL);
1519 }
1520 }
1521
1522
ieee802_1x_eapol_send(void * ctx,void * sta_ctx,u8 type,const u8 * data,size_t datalen)1523 static void ieee802_1x_eapol_send(void *ctx, void *sta_ctx, u8 type,
1524 const u8 *data, size_t datalen)
1525 {
1526 #ifdef CONFIG_WPS
1527 struct sta_info *sta = sta_ctx;
1528
1529 if ((sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) ==
1530 WLAN_STA_MAYBE_WPS) {
1531 const u8 *identity;
1532 size_t identity_len;
1533 struct eapol_state_machine *sm = sta->eapol_sm;
1534
1535 identity = eap_get_identity(sm->eap, &identity_len);
1536 if (identity &&
1537 ((identity_len == WSC_ID_ENROLLEE_LEN &&
1538 os_memcmp(identity, WSC_ID_ENROLLEE,
1539 WSC_ID_ENROLLEE_LEN) == 0) ||
1540 (identity_len == WSC_ID_REGISTRAR_LEN &&
1541 os_memcmp(identity, WSC_ID_REGISTRAR,
1542 WSC_ID_REGISTRAR_LEN) == 0))) {
1543 wpa_printf(MSG_DEBUG, "WPS: WLAN_STA_MAYBE_WPS -> "
1544 "WLAN_STA_WPS");
1545 sta->flags |= WLAN_STA_WPS;
1546 }
1547 }
1548 #endif /* CONFIG_WPS */
1549
1550 ieee802_1x_send(ctx, sta_ctx, type, data, datalen);
1551 }
1552
1553
ieee802_1x_aaa_send(void * ctx,void * sta_ctx,const u8 * data,size_t datalen)1554 static void ieee802_1x_aaa_send(void *ctx, void *sta_ctx,
1555 const u8 *data, size_t datalen)
1556 {
1557 #ifndef CONFIG_NO_RADIUS
1558 struct hostapd_data *hapd = ctx;
1559 struct sta_info *sta = sta_ctx;
1560
1561 ieee802_1x_encapsulate_radius(hapd, sta, data, datalen);
1562 #endif /* CONFIG_NO_RADIUS */
1563 }
1564
1565
_ieee802_1x_finished(void * ctx,void * sta_ctx,int success,int preauth)1566 static void _ieee802_1x_finished(void *ctx, void *sta_ctx, int success,
1567 int preauth)
1568 {
1569 struct hostapd_data *hapd = ctx;
1570 struct sta_info *sta = sta_ctx;
1571 if (preauth)
1572 rsn_preauth_finished(hapd, sta, success);
1573 else
1574 ieee802_1x_finished(hapd, sta, success);
1575 }
1576
1577
ieee802_1x_get_eap_user(void * ctx,const u8 * identity,size_t identity_len,int phase2,struct eap_user * user)1578 static int ieee802_1x_get_eap_user(void *ctx, const u8 *identity,
1579 size_t identity_len, int phase2,
1580 struct eap_user *user)
1581 {
1582 struct hostapd_data *hapd = ctx;
1583 const struct hostapd_eap_user *eap_user;
1584 int i;
1585
1586 eap_user = hostapd_get_eap_user(hapd, identity, identity_len, phase2);
1587 if (eap_user == NULL)
1588 return -1;
1589
1590 os_memset(user, 0, sizeof(*user));
1591 user->phase2 = phase2;
1592 for (i = 0; i < EAP_MAX_METHODS; i++) {
1593 user->methods[i].vendor = eap_user->methods[i].vendor;
1594 user->methods[i].method = eap_user->methods[i].method;
1595 }
1596
1597 if (eap_user->password) {
1598 user->password = os_malloc(eap_user->password_len);
1599 if (user->password == NULL)
1600 return -1;
1601 os_memcpy(user->password, eap_user->password,
1602 eap_user->password_len);
1603 user->password_len = eap_user->password_len;
1604 user->password_hash = eap_user->password_hash;
1605 }
1606 user->force_version = eap_user->force_version;
1607 user->ttls_auth = eap_user->ttls_auth;
1608
1609 return 0;
1610 }
1611
1612
ieee802_1x_sta_entry_alive(void * ctx,const u8 * addr)1613 static int ieee802_1x_sta_entry_alive(void *ctx, const u8 *addr)
1614 {
1615 struct hostapd_data *hapd = ctx;
1616 struct sta_info *sta;
1617 sta = ap_get_sta(hapd, addr);
1618 if (sta == NULL || sta->eapol_sm == NULL)
1619 return 0;
1620 return 1;
1621 }
1622
1623
ieee802_1x_logger(void * ctx,const u8 * addr,eapol_logger_level level,const char * txt)1624 static void ieee802_1x_logger(void *ctx, const u8 *addr,
1625 eapol_logger_level level, const char *txt)
1626 {
1627 #ifndef CONFIG_NO_HOSTAPD_LOGGER
1628 struct hostapd_data *hapd = ctx;
1629 int hlevel;
1630
1631 switch (level) {
1632 case EAPOL_LOGGER_WARNING:
1633 hlevel = HOSTAPD_LEVEL_WARNING;
1634 break;
1635 case EAPOL_LOGGER_INFO:
1636 hlevel = HOSTAPD_LEVEL_INFO;
1637 break;
1638 case EAPOL_LOGGER_DEBUG:
1639 default:
1640 hlevel = HOSTAPD_LEVEL_DEBUG;
1641 break;
1642 }
1643
1644 hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE8021X, hlevel, "%s",
1645 txt);
1646 #endif /* CONFIG_NO_HOSTAPD_LOGGER */
1647 }
1648
1649
ieee802_1x_set_port_authorized(void * ctx,void * sta_ctx,int authorized)1650 static void ieee802_1x_set_port_authorized(void *ctx, void *sta_ctx,
1651 int authorized)
1652 {
1653 struct hostapd_data *hapd = ctx;
1654 struct sta_info *sta = sta_ctx;
1655 ieee802_1x_set_sta_authorized(hapd, sta, authorized);
1656 }
1657
1658
_ieee802_1x_abort_auth(void * ctx,void * sta_ctx)1659 static void _ieee802_1x_abort_auth(void *ctx, void *sta_ctx)
1660 {
1661 struct hostapd_data *hapd = ctx;
1662 struct sta_info *sta = sta_ctx;
1663 ieee802_1x_abort_auth(hapd, sta);
1664 }
1665
1666
_ieee802_1x_tx_key(void * ctx,void * sta_ctx)1667 static void _ieee802_1x_tx_key(void *ctx, void *sta_ctx)
1668 {
1669 struct hostapd_data *hapd = ctx;
1670 struct sta_info *sta = sta_ctx;
1671 ieee802_1x_tx_key(hapd, sta);
1672 }
1673
1674
ieee802_1x_eapol_event(void * ctx,void * sta_ctx,enum eapol_event type)1675 static void ieee802_1x_eapol_event(void *ctx, void *sta_ctx,
1676 enum eapol_event type)
1677 {
1678 /* struct hostapd_data *hapd = ctx; */
1679 struct sta_info *sta = sta_ctx;
1680 switch (type) {
1681 case EAPOL_AUTH_SM_CHANGE:
1682 wpa_auth_sm_notify(sta->wpa_sm);
1683 break;
1684 case EAPOL_AUTH_REAUTHENTICATE:
1685 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
1686 break;
1687 }
1688 }
1689
1690
ieee802_1x_init(struct hostapd_data * hapd)1691 int ieee802_1x_init(struct hostapd_data *hapd)
1692 {
1693 int i;
1694 struct eapol_auth_config conf;
1695 struct eapol_auth_cb cb;
1696
1697 os_memset(&conf, 0, sizeof(conf));
1698 conf.ctx = hapd;
1699 conf.eap_reauth_period = hapd->conf->eap_reauth_period;
1700 conf.wpa = hapd->conf->wpa;
1701 conf.individual_wep_key_len = hapd->conf->individual_wep_key_len;
1702 conf.eap_server = hapd->conf->eap_server;
1703 conf.ssl_ctx = hapd->ssl_ctx;
1704 conf.msg_ctx = hapd->msg_ctx;
1705 conf.eap_sim_db_priv = hapd->eap_sim_db_priv;
1706 conf.eap_req_id_text = hapd->conf->eap_req_id_text;
1707 conf.eap_req_id_text_len = hapd->conf->eap_req_id_text_len;
1708 conf.pac_opaque_encr_key = hapd->conf->pac_opaque_encr_key;
1709 conf.eap_fast_a_id = hapd->conf->eap_fast_a_id;
1710 conf.eap_fast_a_id_len = hapd->conf->eap_fast_a_id_len;
1711 conf.eap_fast_a_id_info = hapd->conf->eap_fast_a_id_info;
1712 conf.eap_fast_prov = hapd->conf->eap_fast_prov;
1713 conf.pac_key_lifetime = hapd->conf->pac_key_lifetime;
1714 conf.pac_key_refresh_time = hapd->conf->pac_key_refresh_time;
1715 conf.eap_sim_aka_result_ind = hapd->conf->eap_sim_aka_result_ind;
1716 conf.tnc = hapd->conf->tnc;
1717 conf.wps = hapd->wps;
1718 conf.fragment_size = hapd->conf->fragment_size;
1719 conf.pwd_group = hapd->conf->pwd_group;
1720 conf.pbc_in_m1 = hapd->conf->pbc_in_m1;
1721 if (hapd->conf->server_id) {
1722 conf.server_id = (const u8 *) hapd->conf->server_id;
1723 conf.server_id_len = os_strlen(hapd->conf->server_id);
1724 } else {
1725 conf.server_id = (const u8 *) "hostapd";
1726 conf.server_id_len = 7;
1727 }
1728
1729 os_memset(&cb, 0, sizeof(cb));
1730 cb.eapol_send = ieee802_1x_eapol_send;
1731 cb.aaa_send = ieee802_1x_aaa_send;
1732 cb.finished = _ieee802_1x_finished;
1733 cb.get_eap_user = ieee802_1x_get_eap_user;
1734 cb.sta_entry_alive = ieee802_1x_sta_entry_alive;
1735 cb.logger = ieee802_1x_logger;
1736 cb.set_port_authorized = ieee802_1x_set_port_authorized;
1737 cb.abort_auth = _ieee802_1x_abort_auth;
1738 cb.tx_key = _ieee802_1x_tx_key;
1739 cb.eapol_event = ieee802_1x_eapol_event;
1740
1741 hapd->eapol_auth = eapol_auth_init(&conf, &cb);
1742 if (hapd->eapol_auth == NULL)
1743 return -1;
1744
1745 if ((hapd->conf->ieee802_1x || hapd->conf->wpa) &&
1746 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 1))
1747 return -1;
1748
1749 #ifndef CONFIG_NO_RADIUS
1750 if (radius_client_register(hapd->radius, RADIUS_AUTH,
1751 ieee802_1x_receive_auth, hapd))
1752 return -1;
1753 #endif /* CONFIG_NO_RADIUS */
1754
1755 if (hapd->conf->default_wep_key_len) {
1756 for (i = 0; i < 4; i++)
1757 hostapd_drv_set_key(hapd->conf->iface, hapd,
1758 WPA_ALG_NONE, NULL, i, 0, NULL, 0,
1759 NULL, 0);
1760
1761 ieee802_1x_rekey(hapd, NULL);
1762
1763 if (hapd->eapol_auth->default_wep_key == NULL)
1764 return -1;
1765 }
1766
1767 return 0;
1768 }
1769
1770
ieee802_1x_deinit(struct hostapd_data * hapd)1771 void ieee802_1x_deinit(struct hostapd_data *hapd)
1772 {
1773 eloop_cancel_timeout(ieee802_1x_rekey, hapd, NULL);
1774
1775 if (hapd->driver != NULL &&
1776 (hapd->conf->ieee802_1x || hapd->conf->wpa))
1777 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0);
1778
1779 eapol_auth_deinit(hapd->eapol_auth);
1780 hapd->eapol_auth = NULL;
1781 }
1782
1783
ieee802_1x_tx_status(struct hostapd_data * hapd,struct sta_info * sta,const u8 * buf,size_t len,int ack)1784 int ieee802_1x_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
1785 const u8 *buf, size_t len, int ack)
1786 {
1787 struct ieee80211_hdr *hdr;
1788 u8 *pos;
1789 const unsigned char rfc1042_hdr[ETH_ALEN] =
1790 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
1791
1792 if (sta == NULL)
1793 return -1;
1794 if (len < sizeof(*hdr) + sizeof(rfc1042_hdr) + 2)
1795 return 0;
1796
1797 hdr = (struct ieee80211_hdr *) buf;
1798 pos = (u8 *) (hdr + 1);
1799 if (os_memcmp(pos, rfc1042_hdr, sizeof(rfc1042_hdr)) != 0)
1800 return 0;
1801 pos += sizeof(rfc1042_hdr);
1802 if (WPA_GET_BE16(pos) != ETH_P_PAE)
1803 return 0;
1804 pos += 2;
1805
1806 return ieee802_1x_eapol_tx_status(hapd, sta, pos, buf + len - pos,
1807 ack);
1808 }
1809
1810
ieee802_1x_eapol_tx_status(struct hostapd_data * hapd,struct sta_info * sta,const u8 * buf,int len,int ack)1811 int ieee802_1x_eapol_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
1812 const u8 *buf, int len, int ack)
1813 {
1814 const struct ieee802_1x_hdr *xhdr =
1815 (const struct ieee802_1x_hdr *) buf;
1816 const u8 *pos = buf + sizeof(*xhdr);
1817 struct ieee802_1x_eapol_key *key;
1818
1819 if (len < (int) sizeof(*xhdr))
1820 return 0;
1821 wpa_printf(MSG_DEBUG, "IEEE 802.1X: " MACSTR " TX status - version=%d "
1822 "type=%d length=%d - ack=%d",
1823 MAC2STR(sta->addr), xhdr->version, xhdr->type,
1824 be_to_host16(xhdr->length), ack);
1825
1826 if (xhdr->type != IEEE802_1X_TYPE_EAPOL_KEY)
1827 return 0;
1828
1829 if (pos + sizeof(struct wpa_eapol_key) <= buf + len) {
1830 const struct wpa_eapol_key *wpa;
1831 wpa = (const struct wpa_eapol_key *) pos;
1832 if (wpa->type == EAPOL_KEY_TYPE_RSN ||
1833 wpa->type == EAPOL_KEY_TYPE_WPA)
1834 wpa_auth_eapol_key_tx_status(hapd->wpa_auth,
1835 sta->wpa_sm, ack);
1836 }
1837
1838 /* EAPOL EAP-Packet packets are eventually re-sent by either Supplicant
1839 * or Authenticator state machines, but EAPOL-Key packets are not
1840 * retransmitted in case of failure. Try to re-send failed EAPOL-Key
1841 * packets couple of times because otherwise STA keys become
1842 * unsynchronized with AP. */
1843 if (!ack && pos + sizeof(*key) <= buf + len) {
1844 key = (struct ieee802_1x_eapol_key *) pos;
1845 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1846 HOSTAPD_LEVEL_DEBUG, "did not Ack EAPOL-Key "
1847 "frame (%scast index=%d)",
1848 key->key_index & BIT(7) ? "uni" : "broad",
1849 key->key_index & ~BIT(7));
1850 /* TODO: re-send EAPOL-Key couple of times (with short delay
1851 * between them?). If all attempt fail, report error and
1852 * deauthenticate STA so that it will get new keys when
1853 * authenticating again (e.g., after returning in range).
1854 * Separate limit/transmit state needed both for unicast and
1855 * broadcast keys(?) */
1856 }
1857 /* TODO: could move unicast key configuration from ieee802_1x_tx_key()
1858 * to here and change the key only if the EAPOL-Key packet was Acked.
1859 */
1860
1861 return 1;
1862 }
1863
1864
ieee802_1x_get_identity(struct eapol_state_machine * sm,size_t * len)1865 u8 * ieee802_1x_get_identity(struct eapol_state_machine *sm, size_t *len)
1866 {
1867 if (sm == NULL || sm->identity == NULL)
1868 return NULL;
1869
1870 *len = sm->identity_len;
1871 return sm->identity;
1872 }
1873
1874
ieee802_1x_get_radius_class(struct eapol_state_machine * sm,size_t * len,int idx)1875 u8 * ieee802_1x_get_radius_class(struct eapol_state_machine *sm, size_t *len,
1876 int idx)
1877 {
1878 if (sm == NULL || sm->radius_class.attr == NULL ||
1879 idx >= (int) sm->radius_class.count)
1880 return NULL;
1881
1882 *len = sm->radius_class.attr[idx].len;
1883 return sm->radius_class.attr[idx].data;
1884 }
1885
1886
ieee802_1x_get_radius_cui(struct eapol_state_machine * sm)1887 struct wpabuf * ieee802_1x_get_radius_cui(struct eapol_state_machine *sm)
1888 {
1889 if (sm == NULL)
1890 return NULL;
1891 return sm->radius_cui;
1892 }
1893
1894
ieee802_1x_get_key(struct eapol_state_machine * sm,size_t * len)1895 const u8 * ieee802_1x_get_key(struct eapol_state_machine *sm, size_t *len)
1896 {
1897 *len = 0;
1898 if (sm == NULL)
1899 return NULL;
1900
1901 *len = sm->eap_if->eapKeyDataLen;
1902 return sm->eap_if->eapKeyData;
1903 }
1904
1905
ieee802_1x_notify_port_enabled(struct eapol_state_machine * sm,int enabled)1906 void ieee802_1x_notify_port_enabled(struct eapol_state_machine *sm,
1907 int enabled)
1908 {
1909 if (sm == NULL)
1910 return;
1911 sm->eap_if->portEnabled = enabled ? TRUE : FALSE;
1912 eapol_auth_step(sm);
1913 }
1914
1915
ieee802_1x_notify_port_valid(struct eapol_state_machine * sm,int valid)1916 void ieee802_1x_notify_port_valid(struct eapol_state_machine *sm,
1917 int valid)
1918 {
1919 if (sm == NULL)
1920 return;
1921 sm->portValid = valid ? TRUE : FALSE;
1922 eapol_auth_step(sm);
1923 }
1924
1925
ieee802_1x_notify_pre_auth(struct eapol_state_machine * sm,int pre_auth)1926 void ieee802_1x_notify_pre_auth(struct eapol_state_machine *sm, int pre_auth)
1927 {
1928 if (sm == NULL)
1929 return;
1930 if (pre_auth)
1931 sm->flags |= EAPOL_SM_PREAUTH;
1932 else
1933 sm->flags &= ~EAPOL_SM_PREAUTH;
1934 }
1935
1936
bool_txt(Boolean bool)1937 static const char * bool_txt(Boolean bool)
1938 {
1939 return bool ? "TRUE" : "FALSE";
1940 }
1941
1942
ieee802_1x_get_mib(struct hostapd_data * hapd,char * buf,size_t buflen)1943 int ieee802_1x_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
1944 {
1945 /* TODO */
1946 return 0;
1947 }
1948
1949
ieee802_1x_get_mib_sta(struct hostapd_data * hapd,struct sta_info * sta,char * buf,size_t buflen)1950 int ieee802_1x_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
1951 char *buf, size_t buflen)
1952 {
1953 int len = 0, ret;
1954 struct eapol_state_machine *sm = sta->eapol_sm;
1955 struct os_time t;
1956
1957 if (sm == NULL)
1958 return 0;
1959
1960 ret = os_snprintf(buf + len, buflen - len,
1961 "dot1xPaePortNumber=%d\n"
1962 "dot1xPaePortProtocolVersion=%d\n"
1963 "dot1xPaePortCapabilities=1\n"
1964 "dot1xPaePortInitialize=%d\n"
1965 "dot1xPaePortReauthenticate=FALSE\n",
1966 sta->aid,
1967 EAPOL_VERSION,
1968 sm->initialize);
1969 if (ret < 0 || (size_t) ret >= buflen - len)
1970 return len;
1971 len += ret;
1972
1973 /* dot1xAuthConfigTable */
1974 ret = os_snprintf(buf + len, buflen - len,
1975 "dot1xAuthPaeState=%d\n"
1976 "dot1xAuthBackendAuthState=%d\n"
1977 "dot1xAuthAdminControlledDirections=%d\n"
1978 "dot1xAuthOperControlledDirections=%d\n"
1979 "dot1xAuthAuthControlledPortStatus=%d\n"
1980 "dot1xAuthAuthControlledPortControl=%d\n"
1981 "dot1xAuthQuietPeriod=%u\n"
1982 "dot1xAuthServerTimeout=%u\n"
1983 "dot1xAuthReAuthPeriod=%u\n"
1984 "dot1xAuthReAuthEnabled=%s\n"
1985 "dot1xAuthKeyTxEnabled=%s\n",
1986 sm->auth_pae_state + 1,
1987 sm->be_auth_state + 1,
1988 sm->adminControlledDirections,
1989 sm->operControlledDirections,
1990 sm->authPortStatus,
1991 sm->portControl,
1992 sm->quietPeriod,
1993 sm->serverTimeout,
1994 sm->reAuthPeriod,
1995 bool_txt(sm->reAuthEnabled),
1996 bool_txt(sm->keyTxEnabled));
1997 if (ret < 0 || (size_t) ret >= buflen - len)
1998 return len;
1999 len += ret;
2000
2001 /* dot1xAuthStatsTable */
2002 ret = os_snprintf(buf + len, buflen - len,
2003 "dot1xAuthEapolFramesRx=%u\n"
2004 "dot1xAuthEapolFramesTx=%u\n"
2005 "dot1xAuthEapolStartFramesRx=%u\n"
2006 "dot1xAuthEapolLogoffFramesRx=%u\n"
2007 "dot1xAuthEapolRespIdFramesRx=%u\n"
2008 "dot1xAuthEapolRespFramesRx=%u\n"
2009 "dot1xAuthEapolReqIdFramesTx=%u\n"
2010 "dot1xAuthEapolReqFramesTx=%u\n"
2011 "dot1xAuthInvalidEapolFramesRx=%u\n"
2012 "dot1xAuthEapLengthErrorFramesRx=%u\n"
2013 "dot1xAuthLastEapolFrameVersion=%u\n"
2014 "dot1xAuthLastEapolFrameSource=" MACSTR "\n",
2015 sm->dot1xAuthEapolFramesRx,
2016 sm->dot1xAuthEapolFramesTx,
2017 sm->dot1xAuthEapolStartFramesRx,
2018 sm->dot1xAuthEapolLogoffFramesRx,
2019 sm->dot1xAuthEapolRespIdFramesRx,
2020 sm->dot1xAuthEapolRespFramesRx,
2021 sm->dot1xAuthEapolReqIdFramesTx,
2022 sm->dot1xAuthEapolReqFramesTx,
2023 sm->dot1xAuthInvalidEapolFramesRx,
2024 sm->dot1xAuthEapLengthErrorFramesRx,
2025 sm->dot1xAuthLastEapolFrameVersion,
2026 MAC2STR(sm->addr));
2027 if (ret < 0 || (size_t) ret >= buflen - len)
2028 return len;
2029 len += ret;
2030
2031 /* dot1xAuthDiagTable */
2032 ret = os_snprintf(buf + len, buflen - len,
2033 "dot1xAuthEntersConnecting=%u\n"
2034 "dot1xAuthEapLogoffsWhileConnecting=%u\n"
2035 "dot1xAuthEntersAuthenticating=%u\n"
2036 "dot1xAuthAuthSuccessesWhileAuthenticating=%u\n"
2037 "dot1xAuthAuthTimeoutsWhileAuthenticating=%u\n"
2038 "dot1xAuthAuthFailWhileAuthenticating=%u\n"
2039 "dot1xAuthAuthEapStartsWhileAuthenticating=%u\n"
2040 "dot1xAuthAuthEapLogoffWhileAuthenticating=%u\n"
2041 "dot1xAuthAuthReauthsWhileAuthenticated=%u\n"
2042 "dot1xAuthAuthEapStartsWhileAuthenticated=%u\n"
2043 "dot1xAuthAuthEapLogoffWhileAuthenticated=%u\n"
2044 "dot1xAuthBackendResponses=%u\n"
2045 "dot1xAuthBackendAccessChallenges=%u\n"
2046 "dot1xAuthBackendOtherRequestsToSupplicant=%u\n"
2047 "dot1xAuthBackendAuthSuccesses=%u\n"
2048 "dot1xAuthBackendAuthFails=%u\n",
2049 sm->authEntersConnecting,
2050 sm->authEapLogoffsWhileConnecting,
2051 sm->authEntersAuthenticating,
2052 sm->authAuthSuccessesWhileAuthenticating,
2053 sm->authAuthTimeoutsWhileAuthenticating,
2054 sm->authAuthFailWhileAuthenticating,
2055 sm->authAuthEapStartsWhileAuthenticating,
2056 sm->authAuthEapLogoffWhileAuthenticating,
2057 sm->authAuthReauthsWhileAuthenticated,
2058 sm->authAuthEapStartsWhileAuthenticated,
2059 sm->authAuthEapLogoffWhileAuthenticated,
2060 sm->backendResponses,
2061 sm->backendAccessChallenges,
2062 sm->backendOtherRequestsToSupplicant,
2063 sm->backendAuthSuccesses,
2064 sm->backendAuthFails);
2065 if (ret < 0 || (size_t) ret >= buflen - len)
2066 return len;
2067 len += ret;
2068
2069 /* dot1xAuthSessionStatsTable */
2070 os_get_time(&t);
2071 ret = os_snprintf(buf + len, buflen - len,
2072 /* TODO: dot1xAuthSessionOctetsRx */
2073 /* TODO: dot1xAuthSessionOctetsTx */
2074 /* TODO: dot1xAuthSessionFramesRx */
2075 /* TODO: dot1xAuthSessionFramesTx */
2076 "dot1xAuthSessionId=%08X-%08X\n"
2077 "dot1xAuthSessionAuthenticMethod=%d\n"
2078 "dot1xAuthSessionTime=%u\n"
2079 "dot1xAuthSessionTerminateCause=999\n"
2080 "dot1xAuthSessionUserName=%s\n",
2081 sta->acct_session_id_hi, sta->acct_session_id_lo,
2082 (wpa_key_mgmt_wpa_ieee8021x(
2083 wpa_auth_sta_key_mgmt(sta->wpa_sm))) ?
2084 1 : 2,
2085 (unsigned int) (t.sec - sta->acct_session_start),
2086 sm->identity);
2087 if (ret < 0 || (size_t) ret >= buflen - len)
2088 return len;
2089 len += ret;
2090
2091 return len;
2092 }
2093
2094
ieee802_1x_finished(struct hostapd_data * hapd,struct sta_info * sta,int success)2095 static void ieee802_1x_finished(struct hostapd_data *hapd,
2096 struct sta_info *sta, int success)
2097 {
2098 const u8 *key;
2099 size_t len;
2100 /* TODO: get PMKLifetime from WPA parameters */
2101 static const int dot11RSNAConfigPMKLifetime = 43200;
2102
2103 key = ieee802_1x_get_key(sta->eapol_sm, &len);
2104 if (success && key && len >= PMK_LEN &&
2105 wpa_auth_pmksa_add(sta->wpa_sm, key, dot11RSNAConfigPMKLifetime,
2106 sta->eapol_sm) == 0) {
2107 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
2108 HOSTAPD_LEVEL_DEBUG,
2109 "Added PMKSA cache entry (IEEE 802.1X)");
2110 }
2111
2112 if (!success) {
2113 /*
2114 * Many devices require deauthentication after WPS provisioning
2115 * and some may not be be able to do that themselves, so
2116 * disconnect the client here. In addition, this may also
2117 * benefit IEEE 802.1X/EAPOL authentication cases, too since
2118 * the EAPOL PAE state machine would remain in HELD state for
2119 * considerable amount of time and some EAP methods, like
2120 * EAP-FAST with anonymous provisioning, may require another
2121 * EAPOL authentication to be started to complete connection.
2122 */
2123 wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "IEEE 802.1X: Force "
2124 "disconnection after EAP-Failure");
2125 /* Add a small sleep to increase likelihood of previously
2126 * requested EAP-Failure TX getting out before this should the
2127 * driver reorder operations.
2128 */
2129 os_sleep(0, 10000);
2130 #ifndef ANDROID_P2P
2131 /* We need not do this for driver. For AP-SME flags if we send this disassoc,
2132 * the p2p_client is gettig disassoc after it has completed the assoc
2133 */
2134 ap_sta_disconnect(hapd, sta, sta->addr,
2135 WLAN_REASON_IEEE_802_1X_AUTH_FAILED);
2136 #endif
2137 }
2138 }
2139