Added an option to add (or override) Credential attribute(s) in M8
[wpasupplicant] / hostapd / ieee802_1x.c
1 /*
2  * hostapd / IEEE 802.1X-2004 Authenticator
3  * Copyright (c) 2002-2008, Jouni Malinen <j@w1.fi>
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License version 2 as
7  * published by the Free Software Foundation.
8  *
9  * Alternatively, this software may be distributed under the terms of BSD
10  * license.
11  *
12  * See README and COPYING for more details.
13  */
14
15 #include "includes.h"
16
17 #include "hostapd.h"
18 #include "ieee802_1x.h"
19 #include "accounting.h"
20 #include "radius/radius.h"
21 #include "radius/radius_client.h"
22 #include "eapol_sm.h"
23 #include "md5.h"
24 #include "rc4.h"
25 #include "eloop.h"
26 #include "sta_info.h"
27 #include "wpa.h"
28 #include "preauth.h"
29 #include "pmksa_cache.h"
30 #include "driver_i.h"
31 #include "hw_features.h"
32 #include "eap_server/eap.h"
33 #include "ieee802_11_defs.h"
34
35
36 static void ieee802_1x_finished(struct hostapd_data *hapd,
37                                 struct sta_info *sta, int success);
38
39
40 static void ieee802_1x_send(struct hostapd_data *hapd, struct sta_info *sta,
41                             u8 type, const u8 *data, size_t datalen)
42 {
43         u8 *buf;
44         struct ieee802_1x_hdr *xhdr;
45         size_t len;
46         int encrypt = 0;
47
48         len = sizeof(*xhdr) + datalen;
49         buf = os_zalloc(len);
50         if (buf == NULL) {
51                 wpa_printf(MSG_ERROR, "malloc() failed for "
52                            "ieee802_1x_send(len=%lu)",
53                            (unsigned long) len);
54                 return;
55         }
56
57         xhdr = (struct ieee802_1x_hdr *) buf;
58         xhdr->version = hapd->conf->eapol_version;
59         xhdr->type = type;
60         xhdr->length = host_to_be16(datalen);
61
62         if (datalen > 0 && data != NULL)
63                 os_memcpy(xhdr + 1, data, datalen);
64
65         if (wpa_auth_pairwise_set(sta->wpa_sm))
66                 encrypt = 1;
67         if (sta->flags & WLAN_STA_PREAUTH) {
68                 rsn_preauth_send(hapd, sta, buf, len);
69         } else {
70                 hostapd_send_eapol(hapd, sta->addr, buf, len, encrypt);
71         }
72
73         os_free(buf);
74 }
75
76
77 void ieee802_1x_set_sta_authorized(struct hostapd_data *hapd,
78                                    struct sta_info *sta, int authorized)
79 {
80         int res;
81
82         if (sta->flags & WLAN_STA_PREAUTH)
83                 return;
84
85         if (authorized) {
86                 sta->flags |= WLAN_STA_AUTHORIZED;
87                 res = hostapd_sta_set_flags(hapd, sta->addr, sta->flags,
88                                             WLAN_STA_AUTHORIZED, ~0);
89                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
90                                HOSTAPD_LEVEL_DEBUG, "authorizing port");
91         } else {
92                 sta->flags &= ~WLAN_STA_AUTHORIZED;
93                 res = hostapd_sta_set_flags(hapd, sta->addr, sta->flags,
94                                             0, ~WLAN_STA_AUTHORIZED);
95                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
96                                HOSTAPD_LEVEL_DEBUG, "unauthorizing port");
97         }
98
99         if (res && errno != ENOENT) {
100                 printf("Could not set station " MACSTR " flags for kernel "
101                        "driver (errno=%d).\n", MAC2STR(sta->addr), errno);
102         }
103
104         if (authorized)
105                 accounting_sta_start(hapd, sta);
106 }
107
108
109 static void ieee802_1x_tx_key_one(struct hostapd_data *hapd,
110                                   struct sta_info *sta,
111                                   int idx, int broadcast,
112                                   u8 *key_data, size_t key_len)
113 {
114         u8 *buf, *ekey;
115         struct ieee802_1x_hdr *hdr;
116         struct ieee802_1x_eapol_key *key;
117         size_t len, ekey_len;
118         struct eapol_state_machine *sm = sta->eapol_sm;
119
120         if (sm == NULL)
121                 return;
122
123         len = sizeof(*key) + key_len;
124         buf = os_zalloc(sizeof(*hdr) + len);
125         if (buf == NULL)
126                 return;
127
128         hdr = (struct ieee802_1x_hdr *) buf;
129         key = (struct ieee802_1x_eapol_key *) (hdr + 1);
130         key->type = EAPOL_KEY_TYPE_RC4;
131         key->key_length = htons(key_len);
132         wpa_get_ntp_timestamp(key->replay_counter);
133
134         if (os_get_random(key->key_iv, sizeof(key->key_iv))) {
135                 wpa_printf(MSG_ERROR, "Could not get random numbers");
136                 os_free(buf);
137                 return;
138         }
139
140         key->key_index = idx | (broadcast ? 0 : BIT(7));
141         if (hapd->conf->eapol_key_index_workaround) {
142                 /* According to some information, WinXP Supplicant seems to
143                  * interpret bit7 as an indication whether the key is to be
144                  * activated, so make it possible to enable workaround that
145                  * sets this bit for all keys. */
146                 key->key_index |= BIT(7);
147         }
148
149         /* Key is encrypted using "Key-IV + MSK[0..31]" as the RC4-key and
150          * MSK[32..63] is used to sign the message. */
151         if (sm->eap_if->eapKeyData == NULL || sm->eap_if->eapKeyDataLen < 64) {
152                 wpa_printf(MSG_ERROR, "No eapKeyData available for encrypting "
153                            "and signing EAPOL-Key");
154                 os_free(buf);
155                 return;
156         }
157         os_memcpy((u8 *) (key + 1), key_data, key_len);
158         ekey_len = sizeof(key->key_iv) + 32;
159         ekey = os_malloc(ekey_len);
160         if (ekey == NULL) {
161                 wpa_printf(MSG_ERROR, "Could not encrypt key");
162                 os_free(buf);
163                 return;
164         }
165         os_memcpy(ekey, key->key_iv, sizeof(key->key_iv));
166         os_memcpy(ekey + sizeof(key->key_iv), sm->eap_if->eapKeyData, 32);
167         rc4((u8 *) (key + 1), key_len, ekey, ekey_len);
168         os_free(ekey);
169
170         /* This header is needed here for HMAC-MD5, but it will be regenerated
171          * in ieee802_1x_send() */
172         hdr->version = hapd->conf->eapol_version;
173         hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
174         hdr->length = host_to_be16(len);
175         hmac_md5(sm->eap_if->eapKeyData + 32, 32, buf, sizeof(*hdr) + len,
176                  key->key_signature);
177
178         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key to " MACSTR
179                    " (%s index=%d)", MAC2STR(sm->addr),
180                    broadcast ? "broadcast" : "unicast", idx);
181         ieee802_1x_send(hapd, sta, IEEE802_1X_TYPE_EAPOL_KEY, (u8 *) key, len);
182         if (sta->eapol_sm)
183                 sta->eapol_sm->dot1xAuthEapolFramesTx++;
184         os_free(buf);
185 }
186
187
188 #ifndef CONFIG_NO_VLAN
189 static struct hostapd_wep_keys *
190 ieee802_1x_group_alloc(struct hostapd_data *hapd, const char *ifname)
191 {
192         struct hostapd_wep_keys *key;
193
194         key = os_zalloc(sizeof(*key));
195         if (key == NULL)
196                 return NULL;
197
198         key->default_len = hapd->conf->default_wep_key_len;
199
200         if (key->idx >= hapd->conf->broadcast_key_idx_max ||
201             key->idx < hapd->conf->broadcast_key_idx_min)
202                 key->idx = hapd->conf->broadcast_key_idx_min;
203         else
204                 key->idx++;
205
206         if (!key->key[key->idx])
207                 key->key[key->idx] = os_malloc(key->default_len);
208         if (key->key[key->idx] == NULL ||
209             os_get_random(key->key[key->idx], key->default_len)) {
210                 printf("Could not generate random WEP key (dynamic VLAN).\n");
211                 os_free(key->key[key->idx]);
212                 key->key[key->idx] = NULL;
213                 os_free(key);
214                 return NULL;
215         }
216         key->len[key->idx] = key->default_len;
217
218         wpa_printf(MSG_DEBUG, "%s: Default WEP idx %d for dynamic VLAN\n",
219                    ifname, key->idx);
220         wpa_hexdump_key(MSG_DEBUG, "Default WEP key (dynamic VLAN)",
221                         key->key[key->idx], key->len[key->idx]);
222
223         if (hostapd_set_encryption(ifname, hapd, "WEP", NULL, key->idx,
224                                    key->key[key->idx], key->len[key->idx], 1))
225                 printf("Could not set dynamic VLAN WEP encryption key.\n");
226
227         hostapd_set_ieee8021x(ifname, hapd, 1);
228
229         return key;
230 }
231
232
233 static struct hostapd_wep_keys *
234 ieee802_1x_get_group(struct hostapd_data *hapd, struct hostapd_ssid *ssid,
235                      size_t vlan_id)
236 {
237         const char *ifname;
238
239         if (vlan_id == 0)
240                 return &ssid->wep;
241
242         if (vlan_id <= ssid->max_dyn_vlan_keys && ssid->dyn_vlan_keys &&
243             ssid->dyn_vlan_keys[vlan_id])
244                 return ssid->dyn_vlan_keys[vlan_id];
245
246         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Creating new group "
247                    "state machine for VLAN ID %lu",
248                    (unsigned long) vlan_id);
249
250         ifname = hostapd_get_vlan_id_ifname(hapd->conf->vlan, vlan_id);
251         if (ifname == NULL) {
252                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Unknown VLAN ID %lu - "
253                            "cannot create group key state machine",
254                            (unsigned long) vlan_id);
255                 return NULL;
256         }
257
258         if (ssid->dyn_vlan_keys == NULL) {
259                 int size = (vlan_id + 1) * sizeof(ssid->dyn_vlan_keys[0]);
260                 ssid->dyn_vlan_keys = os_zalloc(size);
261                 if (ssid->dyn_vlan_keys == NULL)
262                         return NULL;
263                 ssid->max_dyn_vlan_keys = vlan_id;
264         }
265
266         if (ssid->max_dyn_vlan_keys < vlan_id) {
267                 struct hostapd_wep_keys **na;
268                 int size = (vlan_id + 1) * sizeof(ssid->dyn_vlan_keys[0]);
269                 na = os_realloc(ssid->dyn_vlan_keys, size);
270                 if (na == NULL)
271                         return NULL;
272                 ssid->dyn_vlan_keys = na;
273                 os_memset(&ssid->dyn_vlan_keys[ssid->max_dyn_vlan_keys + 1], 0,
274                           (vlan_id - ssid->max_dyn_vlan_keys) *
275                           sizeof(ssid->dyn_vlan_keys[0]));
276                 ssid->max_dyn_vlan_keys = vlan_id;
277         }
278
279         ssid->dyn_vlan_keys[vlan_id] = ieee802_1x_group_alloc(hapd, ifname);
280
281         return ssid->dyn_vlan_keys[vlan_id];
282 }
283 #endif /* CONFIG_NO_VLAN */
284
285
286 void ieee802_1x_tx_key(struct hostapd_data *hapd, struct sta_info *sta)
287 {
288         struct eapol_state_machine *sm = sta->eapol_sm;
289 #ifndef CONFIG_NO_VLAN
290         struct hostapd_wep_keys *key = NULL;
291         int vlan_id;
292 #endif /* CONFIG_NO_VLAN */
293
294         if (sm == NULL || !sm->eap_if->eapKeyData)
295                 return;
296
297         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key(s) to " MACSTR,
298                    MAC2STR(sta->addr));
299
300 #ifndef CONFIG_NO_VLAN
301         vlan_id = sta->vlan_id;
302         if (vlan_id < 0 || vlan_id > MAX_VLAN_ID)
303                 vlan_id = 0;
304
305         if (vlan_id) {
306                 key = ieee802_1x_get_group(hapd, sta->ssid, vlan_id);
307                 if (key && key->key[key->idx])
308                         ieee802_1x_tx_key_one(hapd, sta, key->idx, 1,
309                                               key->key[key->idx],
310                                               key->len[key->idx]);
311         } else
312 #endif /* CONFIG_NO_VLAN */
313         if (hapd->default_wep_key) {
314                 ieee802_1x_tx_key_one(hapd, sta, hapd->default_wep_key_idx, 1,
315                                       hapd->default_wep_key,
316                                       hapd->conf->default_wep_key_len);
317         }
318
319         if (hapd->conf->individual_wep_key_len > 0) {
320                 u8 *ikey;
321                 ikey = os_malloc(hapd->conf->individual_wep_key_len);
322                 if (ikey == NULL ||
323                     os_get_random(ikey, hapd->conf->individual_wep_key_len)) {
324                         wpa_printf(MSG_ERROR, "Could not generate random "
325                                    "individual WEP key.");
326                         os_free(ikey);
327                         return;
328                 }
329
330                 wpa_hexdump_key(MSG_DEBUG, "Individual WEP key",
331                                 ikey, hapd->conf->individual_wep_key_len);
332
333                 ieee802_1x_tx_key_one(hapd, sta, 0, 0, ikey,
334                                       hapd->conf->individual_wep_key_len);
335
336                 /* TODO: set encryption in TX callback, i.e., only after STA
337                  * has ACKed EAPOL-Key frame */
338                 if (hostapd_set_encryption(hapd->conf->iface, hapd, "WEP",
339                                            sta->addr, 0, ikey,
340                                            hapd->conf->individual_wep_key_len,
341                                            1)) {
342                         wpa_printf(MSG_ERROR, "Could not set individual WEP "
343                                    "encryption.");
344                 }
345
346                 os_free(ikey);
347         }
348 }
349
350
351 const char *radius_mode_txt(struct hostapd_data *hapd)
352 {
353         if (hapd->iface->current_mode == NULL)
354                 return "802.11";
355
356         switch (hapd->iface->current_mode->mode) {
357         case HOSTAPD_MODE_IEEE80211A:
358                 return "802.11a";
359         case HOSTAPD_MODE_IEEE80211G:
360                 return "802.11g";
361         case HOSTAPD_MODE_IEEE80211B:
362         default:
363                 return "802.11b";
364         }
365 }
366
367
368 int radius_sta_rate(struct hostapd_data *hapd, struct sta_info *sta)
369 {
370         int i;
371         u8 rate = 0;
372
373         for (i = 0; i < sta->supported_rates_len; i++)
374                 if ((sta->supported_rates[i] & 0x7f) > rate)
375                         rate = sta->supported_rates[i] & 0x7f;
376
377         return rate;
378 }
379
380
381 #ifndef CONFIG_NO_RADIUS
382 static void ieee802_1x_learn_identity(struct hostapd_data *hapd,
383                                       struct eapol_state_machine *sm,
384                                       const u8 *eap, size_t len)
385 {
386         const u8 *identity;
387         size_t identity_len;
388
389         if (len <= sizeof(struct eap_hdr) ||
390             eap[sizeof(struct eap_hdr)] != EAP_TYPE_IDENTITY)
391                 return;
392
393         identity = eap_get_identity(sm->eap, &identity_len);
394         if (identity == NULL)
395                 return;
396
397         /* Save station identity for future RADIUS packets */
398         os_free(sm->identity);
399         sm->identity = os_malloc(identity_len + 1);
400         if (sm->identity == NULL) {
401                 sm->identity_len = 0;
402                 return;
403         }
404
405         os_memcpy(sm->identity, identity, identity_len);
406         sm->identity_len = identity_len;
407         sm->identity[identity_len] = '\0';
408         hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
409                        HOSTAPD_LEVEL_DEBUG, "STA identity '%s'", sm->identity);
410         sm->dot1xAuthEapolRespIdFramesRx++;
411 }
412
413
414 static void ieee802_1x_encapsulate_radius(struct hostapd_data *hapd,
415                                           struct sta_info *sta,
416                                           const u8 *eap, size_t len)
417 {
418         struct radius_msg *msg;
419         char buf[128];
420         struct eapol_state_machine *sm = sta->eapol_sm;
421
422         if (sm == NULL)
423                 return;
424
425         ieee802_1x_learn_identity(hapd, sm, eap, len);
426
427         wpa_printf(MSG_DEBUG, "Encapsulating EAP message into a RADIUS "
428                    "packet");
429
430         sm->radius_identifier = radius_client_get_id(hapd->radius);
431         msg = radius_msg_new(RADIUS_CODE_ACCESS_REQUEST,
432                              sm->radius_identifier);
433         if (msg == NULL) {
434                 printf("Could not create net RADIUS packet\n");
435                 return;
436         }
437
438         radius_msg_make_authenticator(msg, (u8 *) sta, sizeof(*sta));
439
440         if (sm->identity &&
441             !radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME,
442                                  sm->identity, sm->identity_len)) {
443                 printf("Could not add User-Name\n");
444                 goto fail;
445         }
446
447         if (hapd->conf->own_ip_addr.af == AF_INET &&
448             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS,
449                                  (u8 *) &hapd->conf->own_ip_addr.u.v4, 4)) {
450                 printf("Could not add NAS-IP-Address\n");
451                 goto fail;
452         }
453
454 #ifdef CONFIG_IPV6
455         if (hapd->conf->own_ip_addr.af == AF_INET6 &&
456             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IPV6_ADDRESS,
457                                  (u8 *) &hapd->conf->own_ip_addr.u.v6, 16)) {
458                 printf("Could not add NAS-IPv6-Address\n");
459                 goto fail;
460         }
461 #endif /* CONFIG_IPV6 */
462
463         if (hapd->conf->nas_identifier &&
464             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IDENTIFIER,
465                                  (u8 *) hapd->conf->nas_identifier,
466                                  os_strlen(hapd->conf->nas_identifier))) {
467                 printf("Could not add NAS-Identifier\n");
468                 goto fail;
469         }
470
471         if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT, sta->aid)) {
472                 printf("Could not add NAS-Port\n");
473                 goto fail;
474         }
475
476         os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT ":%s",
477                     MAC2STR(hapd->own_addr), hapd->conf->ssid.ssid);
478         buf[sizeof(buf) - 1] = '\0';
479         if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLED_STATION_ID,
480                                  (u8 *) buf, os_strlen(buf))) {
481                 printf("Could not add Called-Station-Id\n");
482                 goto fail;
483         }
484
485         os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
486                     MAC2STR(sta->addr));
487         buf[sizeof(buf) - 1] = '\0';
488         if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID,
489                                  (u8 *) buf, os_strlen(buf))) {
490                 printf("Could not add Calling-Station-Id\n");
491                 goto fail;
492         }
493
494         /* TODO: should probably check MTU from driver config; 2304 is max for
495          * IEEE 802.11, but use 1400 to avoid problems with too large packets
496          */
497         if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_FRAMED_MTU, 1400)) {
498                 printf("Could not add Framed-MTU\n");
499                 goto fail;
500         }
501
502         if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT_TYPE,
503                                        RADIUS_NAS_PORT_TYPE_IEEE_802_11)) {
504                 printf("Could not add NAS-Port-Type\n");
505                 goto fail;
506         }
507
508         if (sta->flags & WLAN_STA_PREAUTH) {
509                 os_strlcpy(buf, "IEEE 802.11i Pre-Authentication",
510                            sizeof(buf));
511         } else {
512                 os_snprintf(buf, sizeof(buf), "CONNECT %d%sMbps %s",
513                             radius_sta_rate(hapd, sta) / 2,
514                             (radius_sta_rate(hapd, sta) & 1) ? ".5" : "",
515                             radius_mode_txt(hapd));
516                 buf[sizeof(buf) - 1] = '\0';
517         }
518         if (!radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO,
519                                  (u8 *) buf, os_strlen(buf))) {
520                 printf("Could not add Connect-Info\n");
521                 goto fail;
522         }
523
524         if (eap && !radius_msg_add_eap(msg, eap, len)) {
525                 printf("Could not add EAP-Message\n");
526                 goto fail;
527         }
528
529         /* State attribute must be copied if and only if this packet is
530          * Access-Request reply to the previous Access-Challenge */
531         if (sm->last_recv_radius && sm->last_recv_radius->hdr->code ==
532             RADIUS_CODE_ACCESS_CHALLENGE) {
533                 int res = radius_msg_copy_attr(msg, sm->last_recv_radius,
534                                                RADIUS_ATTR_STATE);
535                 if (res < 0) {
536                         printf("Could not copy State attribute from previous "
537                                "Access-Challenge\n");
538                         goto fail;
539                 }
540                 if (res > 0) {
541                         wpa_printf(MSG_DEBUG, "Copied RADIUS State Attribute");
542                 }
543         }
544
545         radius_client_send(hapd->radius, msg, RADIUS_AUTH, sta->addr);
546         return;
547
548  fail:
549         radius_msg_free(msg);
550         os_free(msg);
551 }
552 #endif /* CONFIG_NO_RADIUS */
553
554
555 char *eap_type_text(u8 type)
556 {
557         switch (type) {
558         case EAP_TYPE_IDENTITY: return "Identity";
559         case EAP_TYPE_NOTIFICATION: return "Notification";
560         case EAP_TYPE_NAK: return "Nak";
561         case EAP_TYPE_MD5: return "MD5-Challenge";
562         case EAP_TYPE_OTP: return "One-Time Password";
563         case EAP_TYPE_GTC: return "Generic Token Card";
564         case EAP_TYPE_TLS: return "TLS";
565         case EAP_TYPE_TTLS: return "TTLS";
566         case EAP_TYPE_PEAP: return "PEAP";
567         case EAP_TYPE_SIM: return "SIM";
568         case EAP_TYPE_FAST: return "FAST";
569         case EAP_TYPE_SAKE: return "SAKE";
570         case EAP_TYPE_PSK: return "PSK";
571         case EAP_TYPE_PAX: return "PAX";
572         default: return "Unknown";
573         }
574 }
575
576
577 static void handle_eap_response(struct hostapd_data *hapd,
578                                 struct sta_info *sta, struct eap_hdr *eap,
579                                 size_t len)
580 {
581         u8 type, *data;
582         struct eapol_state_machine *sm = sta->eapol_sm;
583         if (sm == NULL)
584                 return;
585
586         data = (u8 *) (eap + 1);
587
588         if (len < sizeof(*eap) + 1) {
589                 printf("handle_eap_response: too short response data\n");
590                 return;
591         }
592
593         sm->eap_type_supp = type = data[0];
594
595         hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
596                        HOSTAPD_LEVEL_DEBUG, "received EAP packet (code=%d "
597                        "id=%d len=%d) from STA: EAP Response-%s (%d)",
598                        eap->code, eap->identifier, be_to_host16(eap->length),
599                        eap_type_text(type), type);
600
601         sm->dot1xAuthEapolRespFramesRx++;
602
603         wpabuf_free(sm->eap_if->eapRespData);
604         sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len);
605         sm->eapolEap = TRUE;
606 }
607
608
609 /* Process incoming EAP packet from Supplicant */
610 static void handle_eap(struct hostapd_data *hapd, struct sta_info *sta,
611                        u8 *buf, size_t len)
612 {
613         struct eap_hdr *eap;
614         u16 eap_len;
615
616         if (len < sizeof(*eap)) {
617                 printf("   too short EAP packet\n");
618                 return;
619         }
620
621         eap = (struct eap_hdr *) buf;
622
623         eap_len = be_to_host16(eap->length);
624         wpa_printf(MSG_DEBUG, "EAP: code=%d identifier=%d length=%d",
625                    eap->code, eap->identifier, eap_len);
626         if (eap_len < sizeof(*eap)) {
627                 wpa_printf(MSG_DEBUG, "   Invalid EAP length");
628                 return;
629         } else if (eap_len > len) {
630                 wpa_printf(MSG_DEBUG, "   Too short frame to contain this EAP "
631                            "packet");
632                 return;
633         } else if (eap_len < len) {
634                 wpa_printf(MSG_DEBUG, "   Ignoring %lu extra bytes after EAP "
635                            "packet", (unsigned long) len - eap_len);
636         }
637
638         switch (eap->code) {
639         case EAP_CODE_REQUEST:
640                 wpa_printf(MSG_DEBUG, " (request)");
641                 return;
642         case EAP_CODE_RESPONSE:
643                 wpa_printf(MSG_DEBUG, " (response)");
644                 handle_eap_response(hapd, sta, eap, eap_len);
645                 break;
646         case EAP_CODE_SUCCESS:
647                 wpa_printf(MSG_DEBUG, " (success)");
648                 return;
649         case EAP_CODE_FAILURE:
650                 wpa_printf(MSG_DEBUG, " (failure)");
651                 return;
652         default:
653                 wpa_printf(MSG_DEBUG, " (unknown code)");
654                 return;
655         }
656 }
657
658
659 /**
660  * ieee802_1x_receive - Process the EAPOL frames from the Supplicant
661  * @hapd: hostapd BSS data
662  * @sa: Source address (sender of the EAPOL frame)
663  * @buf: EAPOL frame
664  * @len: Length of buf in octets
665  *
666  * This function is called for each incoming EAPOL frame from the interface
667  */
668 void ieee802_1x_receive(struct hostapd_data *hapd, const u8 *sa, const u8 *buf,
669                         size_t len)
670 {
671         struct sta_info *sta;
672         struct ieee802_1x_hdr *hdr;
673         struct ieee802_1x_eapol_key *key;
674         u16 datalen;
675         struct rsn_pmksa_cache_entry *pmksa;
676
677         if (!hapd->conf->ieee802_1x && !hapd->conf->wpa &&
678             !hapd->conf->wps_state)
679                 return;
680
681         wpa_printf(MSG_DEBUG, "IEEE 802.1X: %lu bytes from " MACSTR,
682                    (unsigned long) len, MAC2STR(sa));
683         sta = ap_get_sta(hapd, sa);
684         if (!sta || !(sta->flags & WLAN_STA_ASSOC)) {
685                 wpa_printf(MSG_DEBUG, "IEEE 802.1X data frame from not "
686                            "associated STA");
687                 return;
688         }
689
690         if (len < sizeof(*hdr)) {
691                 printf("   too short IEEE 802.1X packet\n");
692                 return;
693         }
694
695         hdr = (struct ieee802_1x_hdr *) buf;
696         datalen = be_to_host16(hdr->length);
697         wpa_printf(MSG_DEBUG, "   IEEE 802.1X: version=%d type=%d length=%d",
698                    hdr->version, hdr->type, datalen);
699
700         if (len - sizeof(*hdr) < datalen) {
701                 printf("   frame too short for this IEEE 802.1X packet\n");
702                 if (sta->eapol_sm)
703                         sta->eapol_sm->dot1xAuthEapLengthErrorFramesRx++;
704                 return;
705         }
706         if (len - sizeof(*hdr) > datalen) {
707                 wpa_printf(MSG_DEBUG, "   ignoring %lu extra octets after "
708                            "IEEE 802.1X packet",
709                            (unsigned long) len - sizeof(*hdr) - datalen);
710         }
711
712         if (sta->eapol_sm) {
713                 sta->eapol_sm->dot1xAuthLastEapolFrameVersion = hdr->version;
714                 sta->eapol_sm->dot1xAuthEapolFramesRx++;
715         }
716
717         key = (struct ieee802_1x_eapol_key *) (hdr + 1);
718         if (datalen >= sizeof(struct ieee802_1x_eapol_key) &&
719             hdr->type == IEEE802_1X_TYPE_EAPOL_KEY &&
720             (key->type == EAPOL_KEY_TYPE_WPA ||
721              key->type == EAPOL_KEY_TYPE_RSN)) {
722                 wpa_receive(hapd->wpa_auth, sta->wpa_sm, (u8 *) hdr,
723                             sizeof(*hdr) + datalen);
724                 return;
725         }
726
727         if ((!hapd->conf->ieee802_1x &&
728              !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) ||
729             wpa_key_mgmt_wpa_psk(wpa_auth_sta_key_mgmt(sta->wpa_sm)))
730                 return;
731
732         if (!sta->eapol_sm) {
733                 sta->eapol_sm = eapol_auth_alloc(hapd->eapol_auth, sta->addr,
734                                                  sta->flags & WLAN_STA_PREAUTH,
735                                                  sta);
736                 if (!sta->eapol_sm)
737                         return;
738
739 #ifdef CONFIG_WPS
740                 if (!hapd->conf->ieee802_1x &&
741                     ((sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) ==
742                      WLAN_STA_MAYBE_WPS)) {
743                         /*
744                          * Delay EAPOL frame transmission until a possible WPS
745                          * STA initiates the handshake with EAPOL-Start.
746                          */
747                         sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
748                 }
749 #endif /* CONFIG_WPS */
750         }
751
752         /* since we support version 1, we can ignore version field and proceed
753          * as specified in version 1 standard [IEEE Std 802.1X-2001, 7.5.5] */
754         /* TODO: actually, we are not version 1 anymore.. However, Version 2
755          * does not change frame contents, so should be ok to process frames
756          * more or less identically. Some changes might be needed for
757          * verification of fields. */
758
759         switch (hdr->type) {
760         case IEEE802_1X_TYPE_EAP_PACKET:
761                 handle_eap(hapd, sta, (u8 *) (hdr + 1), datalen);
762                 break;
763
764         case IEEE802_1X_TYPE_EAPOL_START:
765                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
766                                HOSTAPD_LEVEL_DEBUG, "received EAPOL-Start "
767                                "from STA");
768                 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
769                 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
770                 if (pmksa) {
771                         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
772                                        HOSTAPD_LEVEL_DEBUG, "cached PMKSA "
773                                        "available - ignore it since "
774                                        "STA sent EAPOL-Start");
775                         wpa_auth_sta_clear_pmksa(sta->wpa_sm, pmksa);
776                 }
777                 sta->eapol_sm->eapolStart = TRUE;
778                 sta->eapol_sm->dot1xAuthEapolStartFramesRx++;
779                 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
780                 break;
781
782         case IEEE802_1X_TYPE_EAPOL_LOGOFF:
783                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
784                                HOSTAPD_LEVEL_DEBUG, "received EAPOL-Logoff "
785                                "from STA");
786                 sta->acct_terminate_cause =
787                         RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
788                 accounting_sta_stop(hapd, sta);
789                 sta->eapol_sm->eapolLogoff = TRUE;
790                 sta->eapol_sm->dot1xAuthEapolLogoffFramesRx++;
791                 break;
792
793         case IEEE802_1X_TYPE_EAPOL_KEY:
794                 wpa_printf(MSG_DEBUG, "   EAPOL-Key");
795                 if (!(sta->flags & WLAN_STA_AUTHORIZED)) {
796                         wpa_printf(MSG_DEBUG, "   Dropped key data from "
797                                    "unauthorized Supplicant");
798                         break;
799                 }
800                 break;
801
802         case IEEE802_1X_TYPE_EAPOL_ENCAPSULATED_ASF_ALERT:
803                 wpa_printf(MSG_DEBUG, "   EAPOL-Encapsulated-ASF-Alert");
804                 /* TODO: implement support for this; show data */
805                 break;
806
807         default:
808                 wpa_printf(MSG_DEBUG, "   unknown IEEE 802.1X packet type");
809                 sta->eapol_sm->dot1xAuthInvalidEapolFramesRx++;
810                 break;
811         }
812
813         eapol_auth_step(sta->eapol_sm);
814 }
815
816
817 /**
818  * ieee802_1x_new_station - Start IEEE 802.1X authentication
819  * @hapd: hostapd BSS data
820  * @sta: The station
821  *
822  * This function is called to start IEEE 802.1X authentication when a new
823  * station completes IEEE 802.11 association.
824  */
825 void ieee802_1x_new_station(struct hostapd_data *hapd, struct sta_info *sta)
826 {
827         struct rsn_pmksa_cache_entry *pmksa;
828         int reassoc = 1;
829         int force_1x = 0;
830
831 #ifdef CONFIG_WPS
832         if (hapd->conf->wps_state &&
833             (sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) {
834                 /*
835                  * Need to enable IEEE 802.1X/EAPOL state machines for possible
836                  * WPS handshake even if IEEE 802.1X/EAPOL is not used for
837                  * authentication in this BSS.
838                  */
839                 force_1x = 1;
840         }
841 #endif /* CONFIG_WPS */
842
843         if ((!force_1x && !hapd->conf->ieee802_1x) ||
844             wpa_key_mgmt_wpa_psk(wpa_auth_sta_key_mgmt(sta->wpa_sm)))
845                 return;
846
847         if (sta->eapol_sm == NULL) {
848                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
849                                HOSTAPD_LEVEL_DEBUG, "start authentication");
850                 sta->eapol_sm = eapol_auth_alloc(hapd->eapol_auth, sta->addr,
851                                                  sta->flags & WLAN_STA_PREAUTH,
852                                                  sta);
853                 if (sta->eapol_sm == NULL) {
854                         hostapd_logger(hapd, sta->addr,
855                                        HOSTAPD_MODULE_IEEE8021X,
856                                        HOSTAPD_LEVEL_INFO,
857                                        "failed to allocate state machine");
858                         return;
859                 }
860                 reassoc = 0;
861         }
862
863 #ifdef CONFIG_WPS
864         sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
865         if (!hapd->conf->ieee802_1x && !(sta->flags & WLAN_STA_WPS)) {
866                 /*
867                  * Delay EAPOL frame transmission until a possible WPS
868                  * initiates the handshake with EAPOL-Start.
869                  */
870                 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
871         }
872 #endif /* CONFIG_WPS */
873
874         sta->eapol_sm->eap_if->portEnabled = TRUE;
875
876         pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
877         if (pmksa) {
878                 int old_vlanid;
879
880                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
881                                HOSTAPD_LEVEL_DEBUG,
882                                "PMK from PMKSA cache - skip IEEE 802.1X/EAP");
883                 /* Setup EAPOL state machines to already authenticated state
884                  * because of existing PMKSA information in the cache. */
885                 sta->eapol_sm->keyRun = TRUE;
886                 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
887                 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
888                 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
889                 sta->eapol_sm->authSuccess = TRUE;
890                 if (sta->eapol_sm->eap)
891                         eap_sm_notify_cached(sta->eapol_sm->eap);
892                 old_vlanid = sta->vlan_id;
893                 pmksa_cache_to_eapol_data(pmksa, sta->eapol_sm);
894                 if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
895                         sta->vlan_id = 0;
896                 ap_sta_bind_vlan(hapd, sta, old_vlanid);
897         } else {
898                 if (reassoc) {
899                         /*
900                          * Force EAPOL state machines to start
901                          * re-authentication without having to wait for the
902                          * Supplicant to send EAPOL-Start.
903                          */
904                         sta->eapol_sm->reAuthenticate = TRUE;
905                 }
906                 eapol_auth_step(sta->eapol_sm);
907         }
908 }
909
910
911 void ieee802_1x_free_station(struct sta_info *sta)
912 {
913         struct eapol_state_machine *sm = sta->eapol_sm;
914
915         if (sm == NULL)
916                 return;
917
918         sta->eapol_sm = NULL;
919
920 #ifndef CONFIG_NO_RADIUS
921         if (sm->last_recv_radius) {
922                 radius_msg_free(sm->last_recv_radius);
923                 os_free(sm->last_recv_radius);
924         }
925         radius_free_class(&sm->radius_class);
926 #endif /* CONFIG_NO_RADIUS */
927
928         os_free(sm->identity);
929         eapol_auth_free(sm);
930 }
931
932
933 #ifndef CONFIG_NO_RADIUS
934 static void ieee802_1x_decapsulate_radius(struct hostapd_data *hapd,
935                                           struct sta_info *sta)
936 {
937         u8 *eap;
938         size_t len;
939         struct eap_hdr *hdr;
940         int eap_type = -1;
941         char buf[64];
942         struct radius_msg *msg;
943         struct eapol_state_machine *sm = sta->eapol_sm;
944
945         if (sm == NULL || sm->last_recv_radius == NULL) {
946                 if (sm)
947                         sm->eap_if->aaaEapNoReq = TRUE;
948                 return;
949         }
950
951         msg = sm->last_recv_radius;
952
953         eap = radius_msg_get_eap(msg, &len);
954         if (eap == NULL) {
955                 /* RFC 3579, Chap. 2.6.3:
956                  * RADIUS server SHOULD NOT send Access-Reject/no EAP-Message
957                  * attribute */
958                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
959                                HOSTAPD_LEVEL_WARNING, "could not extract "
960                                "EAP-Message from RADIUS message");
961                 sm->eap_if->aaaEapNoReq = TRUE;
962                 return;
963         }
964
965         if (len < sizeof(*hdr)) {
966                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
967                                HOSTAPD_LEVEL_WARNING, "too short EAP packet "
968                                "received from authentication server");
969                 os_free(eap);
970                 sm->eap_if->aaaEapNoReq = TRUE;
971                 return;
972         }
973
974         if (len > sizeof(*hdr))
975                 eap_type = eap[sizeof(*hdr)];
976
977         hdr = (struct eap_hdr *) eap;
978         switch (hdr->code) {
979         case EAP_CODE_REQUEST:
980                 if (eap_type >= 0)
981                         sm->eap_type_authsrv = eap_type;
982                 os_snprintf(buf, sizeof(buf), "EAP-Request-%s (%d)",
983                             eap_type >= 0 ? eap_type_text(eap_type) : "??",
984                             eap_type);
985                 break;
986         case EAP_CODE_RESPONSE:
987                 os_snprintf(buf, sizeof(buf), "EAP Response-%s (%d)",
988                             eap_type >= 0 ? eap_type_text(eap_type) : "??",
989                             eap_type);
990                 break;
991         case EAP_CODE_SUCCESS:
992                 os_strlcpy(buf, "EAP Success", sizeof(buf));
993                 break;
994         case EAP_CODE_FAILURE:
995                 os_strlcpy(buf, "EAP Failure", sizeof(buf));
996                 break;
997         default:
998                 os_strlcpy(buf, "unknown EAP code", sizeof(buf));
999                 break;
1000         }
1001         buf[sizeof(buf) - 1] = '\0';
1002         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1003                        HOSTAPD_LEVEL_DEBUG, "decapsulated EAP packet (code=%d "
1004                        "id=%d len=%d) from RADIUS server: %s",
1005                        hdr->code, hdr->identifier, be_to_host16(hdr->length),
1006                        buf);
1007         sm->eap_if->aaaEapReq = TRUE;
1008
1009         wpabuf_free(sm->eap_if->aaaEapReqData);
1010         sm->eap_if->aaaEapReqData = wpabuf_alloc_ext_data(eap, len);
1011 }
1012
1013
1014 static void ieee802_1x_get_keys(struct hostapd_data *hapd,
1015                                 struct sta_info *sta, struct radius_msg *msg,
1016                                 struct radius_msg *req,
1017                                 const u8 *shared_secret,
1018                                 size_t shared_secret_len)
1019 {
1020         struct radius_ms_mppe_keys *keys;
1021         struct eapol_state_machine *sm = sta->eapol_sm;
1022         if (sm == NULL)
1023                 return;
1024
1025         keys = radius_msg_get_ms_keys(msg, req, shared_secret,
1026                                       shared_secret_len);
1027
1028         if (keys && keys->send && keys->recv) {
1029                 size_t len = keys->send_len + keys->recv_len;
1030                 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Send-Key",
1031                                 keys->send, keys->send_len);
1032                 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Recv-Key",
1033                                 keys->recv, keys->recv_len);
1034
1035                 os_free(sm->eap_if->aaaEapKeyData);
1036                 sm->eap_if->aaaEapKeyData = os_malloc(len);
1037                 if (sm->eap_if->aaaEapKeyData) {
1038                         os_memcpy(sm->eap_if->aaaEapKeyData, keys->recv,
1039                                   keys->recv_len);
1040                         os_memcpy(sm->eap_if->aaaEapKeyData + keys->recv_len,
1041                                   keys->send, keys->send_len);
1042                         sm->eap_if->aaaEapKeyDataLen = len;
1043                         sm->eap_if->aaaEapKeyAvailable = TRUE;
1044                 }
1045         }
1046
1047         if (keys) {
1048                 os_free(keys->send);
1049                 os_free(keys->recv);
1050                 os_free(keys);
1051         }
1052 }
1053
1054
1055 static void ieee802_1x_store_radius_class(struct hostapd_data *hapd,
1056                                           struct sta_info *sta,
1057                                           struct radius_msg *msg)
1058 {
1059         u8 *class;
1060         size_t class_len;
1061         struct eapol_state_machine *sm = sta->eapol_sm;
1062         int count, i;
1063         struct radius_attr_data *nclass;
1064         size_t nclass_count;
1065
1066         if (!hapd->conf->radius->acct_server || hapd->radius == NULL ||
1067             sm == NULL)
1068                 return;
1069
1070         radius_free_class(&sm->radius_class);
1071         count = radius_msg_count_attr(msg, RADIUS_ATTR_CLASS, 1);
1072         if (count <= 0)
1073                 return;
1074
1075         nclass = os_zalloc(count * sizeof(struct radius_attr_data));
1076         if (nclass == NULL)
1077                 return;
1078
1079         nclass_count = 0;
1080
1081         class = NULL;
1082         for (i = 0; i < count; i++) {
1083                 do {
1084                         if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CLASS,
1085                                                     &class, &class_len,
1086                                                     class) < 0) {
1087                                 i = count;
1088                                 break;
1089                         }
1090                 } while (class_len < 1);
1091
1092                 nclass[nclass_count].data = os_malloc(class_len);
1093                 if (nclass[nclass_count].data == NULL)
1094                         break;
1095
1096                 os_memcpy(nclass[nclass_count].data, class, class_len);
1097                 nclass[nclass_count].len = class_len;
1098                 nclass_count++;
1099         }
1100
1101         sm->radius_class.attr = nclass;
1102         sm->radius_class.count = nclass_count;
1103         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Stored %lu RADIUS Class "
1104                    "attributes for " MACSTR,
1105                    (unsigned long) sm->radius_class.count,
1106                    MAC2STR(sta->addr));
1107 }
1108
1109
1110 /* Update sta->identity based on User-Name attribute in Access-Accept */
1111 static void ieee802_1x_update_sta_identity(struct hostapd_data *hapd,
1112                                            struct sta_info *sta,
1113                                            struct radius_msg *msg)
1114 {
1115         u8 *buf, *identity;
1116         size_t len;
1117         struct eapol_state_machine *sm = sta->eapol_sm;
1118
1119         if (sm == NULL)
1120                 return;
1121
1122         if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_USER_NAME, &buf, &len,
1123                                     NULL) < 0)
1124                 return;
1125
1126         identity = os_malloc(len + 1);
1127         if (identity == NULL)
1128                 return;
1129
1130         os_memcpy(identity, buf, len);
1131         identity[len] = '\0';
1132
1133         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1134                        HOSTAPD_LEVEL_DEBUG, "old identity '%s' updated with "
1135                        "User-Name from Access-Accept '%s'",
1136                        sm->identity ? (char *) sm->identity : "N/A",
1137                        (char *) identity);
1138
1139         os_free(sm->identity);
1140         sm->identity = identity;
1141         sm->identity_len = len;
1142 }
1143
1144
1145 struct sta_id_search {
1146         u8 identifier;
1147         struct eapol_state_machine *sm;
1148 };
1149
1150
1151 static int ieee802_1x_select_radius_identifier(struct hostapd_data *hapd,
1152                                                struct sta_info *sta,
1153                                                void *ctx)
1154 {
1155         struct sta_id_search *id_search = ctx;
1156         struct eapol_state_machine *sm = sta->eapol_sm;
1157
1158         if (sm && sm->radius_identifier >= 0 &&
1159             sm->radius_identifier == id_search->identifier) {
1160                 id_search->sm = sm;
1161                 return 1;
1162         }
1163         return 0;
1164 }
1165
1166
1167 static struct eapol_state_machine *
1168 ieee802_1x_search_radius_identifier(struct hostapd_data *hapd, u8 identifier)
1169 {
1170         struct sta_id_search id_search;
1171         id_search.identifier = identifier;
1172         id_search.sm = NULL;
1173         ap_for_each_sta(hapd, ieee802_1x_select_radius_identifier, &id_search);
1174         return id_search.sm;
1175 }
1176
1177
1178 /**
1179  * ieee802_1x_receive_auth - Process RADIUS frames from Authentication Server
1180  * @msg: RADIUS response message
1181  * @req: RADIUS request message
1182  * @shared_secret: RADIUS shared secret
1183  * @shared_secret_len: Length of shared_secret in octets
1184  * @data: Context data (struct hostapd_data *)
1185  * Returns: Processing status
1186  */
1187 static RadiusRxResult
1188 ieee802_1x_receive_auth(struct radius_msg *msg, struct radius_msg *req,
1189                         const u8 *shared_secret, size_t shared_secret_len,
1190                         void *data)
1191 {
1192         struct hostapd_data *hapd = data;
1193         struct sta_info *sta;
1194         u32 session_timeout = 0, termination_action, acct_interim_interval;
1195         int session_timeout_set, old_vlanid = 0;
1196         struct eapol_state_machine *sm;
1197         int override_eapReq = 0;
1198
1199         sm = ieee802_1x_search_radius_identifier(hapd, msg->hdr->identifier);
1200         if (sm == NULL) {
1201                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Could not find matching "
1202                            "station for this RADIUS message");
1203                 return RADIUS_RX_UNKNOWN;
1204         }
1205         sta = sm->sta;
1206
1207         /* RFC 2869, Ch. 5.13: valid Message-Authenticator attribute MUST be
1208          * present when packet contains an EAP-Message attribute */
1209         if (msg->hdr->code == RADIUS_CODE_ACCESS_REJECT &&
1210             radius_msg_get_attr(msg, RADIUS_ATTR_MESSAGE_AUTHENTICATOR, NULL,
1211                                 0) < 0 &&
1212             radius_msg_get_attr(msg, RADIUS_ATTR_EAP_MESSAGE, NULL, 0) < 0) {
1213                 wpa_printf(MSG_DEBUG, "Allowing RADIUS Access-Reject without "
1214                            "Message-Authenticator since it does not include "
1215                            "EAP-Message");
1216         } else if (radius_msg_verify(msg, shared_secret, shared_secret_len,
1217                                      req, 1)) {
1218                 printf("Incoming RADIUS packet did not have correct "
1219                        "Message-Authenticator - dropped\n");
1220                 return RADIUS_RX_INVALID_AUTHENTICATOR;
1221         }
1222
1223         if (msg->hdr->code != RADIUS_CODE_ACCESS_ACCEPT &&
1224             msg->hdr->code != RADIUS_CODE_ACCESS_REJECT &&
1225             msg->hdr->code != RADIUS_CODE_ACCESS_CHALLENGE) {
1226                 printf("Unknown RADIUS message code\n");
1227                 return RADIUS_RX_UNKNOWN;
1228         }
1229
1230         sm->radius_identifier = -1;
1231         wpa_printf(MSG_DEBUG, "RADIUS packet matching with station " MACSTR,
1232                    MAC2STR(sta->addr));
1233
1234         if (sm->last_recv_radius) {
1235                 radius_msg_free(sm->last_recv_radius);
1236                 os_free(sm->last_recv_radius);
1237         }
1238
1239         sm->last_recv_radius = msg;
1240
1241         session_timeout_set =
1242                 !radius_msg_get_attr_int32(msg, RADIUS_ATTR_SESSION_TIMEOUT,
1243                                            &session_timeout);
1244         if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_TERMINATION_ACTION,
1245                                       &termination_action))
1246                 termination_action = RADIUS_TERMINATION_ACTION_DEFAULT;
1247
1248         if (hapd->conf->radius->acct_interim_interval == 0 &&
1249             msg->hdr->code == RADIUS_CODE_ACCESS_ACCEPT &&
1250             radius_msg_get_attr_int32(msg, RADIUS_ATTR_ACCT_INTERIM_INTERVAL,
1251                                       &acct_interim_interval) == 0) {
1252                 if (acct_interim_interval < 60) {
1253                         hostapd_logger(hapd, sta->addr,
1254                                        HOSTAPD_MODULE_IEEE8021X,
1255                                        HOSTAPD_LEVEL_INFO,
1256                                        "ignored too small "
1257                                        "Acct-Interim-Interval %d",
1258                                        acct_interim_interval);
1259                 } else
1260                         sta->acct_interim_interval = acct_interim_interval;
1261         }
1262
1263
1264         switch (msg->hdr->code) {
1265         case RADIUS_CODE_ACCESS_ACCEPT:
1266                 if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
1267                         sta->vlan_id = 0;
1268 #ifndef CONFIG_NO_VLAN
1269                 else {
1270                         old_vlanid = sta->vlan_id;
1271                         sta->vlan_id = radius_msg_get_vlanid(msg);
1272                 }
1273                 if (sta->vlan_id > 0 &&
1274                     hostapd_get_vlan_id_ifname(hapd->conf->vlan,
1275                                                sta->vlan_id)) {
1276                         hostapd_logger(hapd, sta->addr,
1277                                        HOSTAPD_MODULE_RADIUS,
1278                                        HOSTAPD_LEVEL_INFO,
1279                                        "VLAN ID %d", sta->vlan_id);
1280                 } else if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_REQUIRED) {
1281                         sta->eapol_sm->authFail = TRUE;
1282                         hostapd_logger(hapd, sta->addr,
1283                                        HOSTAPD_MODULE_IEEE8021X,
1284                                        HOSTAPD_LEVEL_INFO, "authentication "
1285                                        "server did not include required VLAN "
1286                                        "ID in Access-Accept");
1287                         break;
1288                 }
1289 #endif /* CONFIG_NO_VLAN */
1290
1291                 ap_sta_bind_vlan(hapd, sta, old_vlanid);
1292
1293                 /* RFC 3580, Ch. 3.17 */
1294                 if (session_timeout_set && termination_action ==
1295                     RADIUS_TERMINATION_ACTION_RADIUS_REQUEST) {
1296                         sm->reAuthPeriod = session_timeout;
1297                 } else if (session_timeout_set)
1298                         ap_sta_session_timeout(hapd, sta, session_timeout);
1299
1300                 sm->eap_if->aaaSuccess = TRUE;
1301                 override_eapReq = 1;
1302                 ieee802_1x_get_keys(hapd, sta, msg, req, shared_secret,
1303                                     shared_secret_len);
1304                 ieee802_1x_store_radius_class(hapd, sta, msg);
1305                 ieee802_1x_update_sta_identity(hapd, sta, msg);
1306                 if (sm->eap_if->eapKeyAvailable &&
1307                     wpa_auth_pmksa_add(sta->wpa_sm, sm->eapol_key_crypt,
1308                                        session_timeout_set ?
1309                                        (int) session_timeout : -1, sm) == 0) {
1310                         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
1311                                        HOSTAPD_LEVEL_DEBUG,
1312                                        "Added PMKSA cache entry");
1313                 }
1314                 break;
1315         case RADIUS_CODE_ACCESS_REJECT:
1316                 sm->eap_if->aaaFail = TRUE;
1317                 override_eapReq = 1;
1318                 break;
1319         case RADIUS_CODE_ACCESS_CHALLENGE:
1320                 sm->eap_if->aaaEapReq = TRUE;
1321                 if (session_timeout_set) {
1322                         /* RFC 2869, Ch. 2.3.2; RFC 3580, Ch. 3.17 */
1323                         sm->eap_if->aaaMethodTimeout = session_timeout;
1324                         hostapd_logger(hapd, sm->addr,
1325                                        HOSTAPD_MODULE_IEEE8021X,
1326                                        HOSTAPD_LEVEL_DEBUG,
1327                                        "using EAP timeout of %d seconds (from "
1328                                        "RADIUS)",
1329                                        sm->eap_if->aaaMethodTimeout);
1330                 } else {
1331                         /*
1332                          * Use dynamic retransmission behavior per EAP
1333                          * specification.
1334                          */
1335                         sm->eap_if->aaaMethodTimeout = 0;
1336                 }
1337                 break;
1338         }
1339
1340         ieee802_1x_decapsulate_radius(hapd, sta);
1341         if (override_eapReq)
1342                 sm->eap_if->aaaEapReq = FALSE;
1343
1344         eapol_auth_step(sm);
1345
1346         return RADIUS_RX_QUEUED;
1347 }
1348 #endif /* CONFIG_NO_RADIUS */
1349
1350
1351 void ieee802_1x_abort_auth(struct hostapd_data *hapd, struct sta_info *sta)
1352 {
1353         struct eapol_state_machine *sm = sta->eapol_sm;
1354         if (sm == NULL)
1355                 return;
1356
1357         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1358                        HOSTAPD_LEVEL_DEBUG, "aborting authentication");
1359
1360 #ifndef CONFIG_NO_RADIUS
1361         if (sm->last_recv_radius) {
1362                 radius_msg_free(sm->last_recv_radius);
1363                 os_free(sm->last_recv_radius);
1364                 sm->last_recv_radius = NULL;
1365         }
1366 #endif /* CONFIG_NO_RADIUS */
1367
1368         if (sm->eap_if->eapTimeout) {
1369                 /*
1370                  * Disconnect the STA since it did not reply to the last EAP
1371                  * request and we cannot continue EAP processing (EAP-Failure
1372                  * could only be sent if the EAP peer actually replied).
1373                  */
1374                 sm->eap_if->portEnabled = FALSE;
1375                 hostapd_sta_deauth(hapd, sta->addr,
1376                                    WLAN_REASON_PREV_AUTH_NOT_VALID);
1377                 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC |
1378                                 WLAN_STA_AUTHORIZED);
1379                 eloop_cancel_timeout(ap_handle_timer, hapd, sta);
1380                 eloop_register_timeout(0, 0, ap_handle_timer, hapd, sta);
1381                 sta->timeout_next = STA_REMOVE;
1382         }
1383 }
1384
1385
1386 #ifdef HOSTAPD_DUMP_STATE
1387 static void fprint_char(FILE *f, char c)
1388 {
1389         if (c >= 32 && c < 127)
1390                 fprintf(f, "%c", c);
1391         else
1392                 fprintf(f, "<%02x>", c);
1393 }
1394
1395
1396 void ieee802_1x_dump_state(FILE *f, const char *prefix, struct sta_info *sta)
1397 {
1398         struct eapol_state_machine *sm = sta->eapol_sm;
1399         if (sm == NULL)
1400                 return;
1401
1402         fprintf(f, "%sIEEE 802.1X:\n", prefix);
1403
1404         if (sm->identity) {
1405                 size_t i;
1406                 fprintf(f, "%sidentity=", prefix);
1407                 for (i = 0; i < sm->identity_len; i++)
1408                         fprint_char(f, sm->identity[i]);
1409                 fprintf(f, "\n");
1410         }
1411
1412         fprintf(f, "%slast EAP type: Authentication Server: %d (%s) "
1413                 "Supplicant: %d (%s)\n", prefix,
1414                 sm->eap_type_authsrv, eap_type_text(sm->eap_type_authsrv),
1415                 sm->eap_type_supp, eap_type_text(sm->eap_type_supp));
1416
1417         fprintf(f, "%scached_packets=%s\n", prefix,
1418                 sm->last_recv_radius ? "[RX RADIUS]" : "");
1419
1420         eapol_auth_dump_state(f, prefix, sm);
1421 }
1422 #endif /* HOSTAPD_DUMP_STATE */
1423
1424
1425 static int ieee802_1x_rekey_broadcast(struct hostapd_data *hapd)
1426 {
1427         if (hapd->conf->default_wep_key_len < 1)
1428                 return 0;
1429
1430         os_free(hapd->default_wep_key);
1431         hapd->default_wep_key = os_malloc(hapd->conf->default_wep_key_len);
1432         if (hapd->default_wep_key == NULL ||
1433             os_get_random(hapd->default_wep_key,
1434                           hapd->conf->default_wep_key_len)) {
1435                 printf("Could not generate random WEP key.\n");
1436                 os_free(hapd->default_wep_key);
1437                 hapd->default_wep_key = NULL;
1438                 return -1;
1439         }
1440
1441         wpa_hexdump_key(MSG_DEBUG, "IEEE 802.1X: New default WEP key",
1442                         hapd->default_wep_key,
1443                         hapd->conf->default_wep_key_len);
1444
1445         return 0;
1446 }
1447
1448
1449 static int ieee802_1x_sta_key_available(struct hostapd_data *hapd,
1450                                         struct sta_info *sta, void *ctx)
1451 {
1452         if (sta->eapol_sm) {
1453                 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
1454                 eapol_auth_step(sta->eapol_sm);
1455         }
1456         return 0;
1457 }
1458
1459
1460 static void ieee802_1x_rekey(void *eloop_ctx, void *timeout_ctx)
1461 {
1462         struct hostapd_data *hapd = eloop_ctx;
1463
1464         if (hapd->default_wep_key_idx >= 3)
1465                 hapd->default_wep_key_idx =
1466                         hapd->conf->individual_wep_key_len > 0 ? 1 : 0;
1467         else
1468                 hapd->default_wep_key_idx++;
1469
1470         wpa_printf(MSG_DEBUG, "IEEE 802.1X: New default WEP key index %d",
1471                    hapd->default_wep_key_idx);
1472                       
1473         if (ieee802_1x_rekey_broadcast(hapd)) {
1474                 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1475                                HOSTAPD_LEVEL_WARNING, "failed to generate a "
1476                                "new broadcast key");
1477                 os_free(hapd->default_wep_key);
1478                 hapd->default_wep_key = NULL;
1479                 return;
1480         }
1481
1482         /* TODO: Could setup key for RX here, but change default TX keyid only
1483          * after new broadcast key has been sent to all stations. */
1484         if (hostapd_set_encryption(hapd->conf->iface, hapd, "WEP", NULL,
1485                                    hapd->default_wep_key_idx,
1486                                    hapd->default_wep_key,
1487                                    hapd->conf->default_wep_key_len, 1)) {
1488                 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1489                                HOSTAPD_LEVEL_WARNING, "failed to configure a "
1490                                "new broadcast key");
1491                 os_free(hapd->default_wep_key);
1492                 hapd->default_wep_key = NULL;
1493                 return;
1494         }
1495
1496         ap_for_each_sta(hapd, ieee802_1x_sta_key_available, NULL);
1497
1498         if (hapd->conf->wep_rekeying_period > 0) {
1499                 eloop_register_timeout(hapd->conf->wep_rekeying_period, 0,
1500                                        ieee802_1x_rekey, hapd, NULL);
1501         }
1502 }
1503
1504
1505 static void ieee802_1x_eapol_send(void *ctx, void *sta_ctx, u8 type,
1506                                   const u8 *data, size_t datalen)
1507 {
1508         ieee802_1x_send(ctx, sta_ctx, type, data, datalen);
1509 }
1510
1511
1512 static void ieee802_1x_aaa_send(void *ctx, void *sta_ctx,
1513                                 const u8 *data, size_t datalen)
1514 {
1515 #ifndef CONFIG_NO_RADIUS
1516         struct hostapd_data *hapd = ctx;
1517         struct sta_info *sta = sta_ctx;
1518
1519         ieee802_1x_encapsulate_radius(hapd, sta, data, datalen);
1520 #endif /* CONFIG_NO_RADIUS */
1521 }
1522
1523
1524 static void _ieee802_1x_finished(void *ctx, void *sta_ctx, int success,
1525                                  int preauth)
1526 {
1527         struct hostapd_data *hapd = ctx;
1528         struct sta_info *sta = sta_ctx;
1529         if (preauth)
1530                 rsn_preauth_finished(hapd, sta, success);
1531         else
1532                 ieee802_1x_finished(hapd, sta, success);
1533 }
1534
1535
1536 static int ieee802_1x_get_eap_user(void *ctx, const u8 *identity,
1537                                    size_t identity_len, int phase2,
1538                                    struct eap_user *user)
1539 {
1540         struct hostapd_data *hapd = ctx;
1541         const struct hostapd_eap_user *eap_user;
1542         int i, count;
1543
1544         eap_user = hostapd_get_eap_user(hapd->conf, identity,
1545                                         identity_len, phase2);
1546         if (eap_user == NULL)
1547                 return -1;
1548
1549         os_memset(user, 0, sizeof(*user));
1550         user->phase2 = phase2;
1551         count = EAP_USER_MAX_METHODS;
1552         if (count > EAP_MAX_METHODS)
1553                 count = EAP_MAX_METHODS;
1554         for (i = 0; i < count; i++) {
1555                 user->methods[i].vendor = eap_user->methods[i].vendor;
1556                 user->methods[i].method = eap_user->methods[i].method;
1557         }
1558
1559         if (eap_user->password) {
1560                 user->password = os_malloc(eap_user->password_len);
1561                 if (user->password == NULL)
1562                         return -1;
1563                 os_memcpy(user->password, eap_user->password,
1564                           eap_user->password_len);
1565                 user->password_len = eap_user->password_len;
1566         }
1567         user->force_version = eap_user->force_version;
1568         user->ttls_auth = eap_user->ttls_auth;
1569
1570         return 0;
1571 }
1572
1573
1574 static int ieee802_1x_sta_entry_alive(void *ctx, const u8 *addr)
1575 {
1576         struct hostapd_data *hapd = ctx;
1577         struct sta_info *sta;
1578         sta = ap_get_sta(hapd, addr);
1579         if (sta == NULL || sta->eapol_sm == NULL)
1580                 return 0;
1581         return 1;
1582 }
1583
1584
1585 static void ieee802_1x_logger(void *ctx, const u8 *addr,
1586                               eapol_logger_level level, const char *txt)
1587 {
1588 #ifndef CONFIG_NO_HOSTAPD_LOGGER
1589         struct hostapd_data *hapd = ctx;
1590         int hlevel;
1591
1592         switch (level) {
1593         case EAPOL_LOGGER_WARNING:
1594                 hlevel = HOSTAPD_LEVEL_WARNING;
1595                 break;
1596         case EAPOL_LOGGER_INFO:
1597                 hlevel = HOSTAPD_LEVEL_INFO;
1598                 break;
1599         case EAPOL_LOGGER_DEBUG:
1600         default:
1601                 hlevel = HOSTAPD_LEVEL_DEBUG;
1602                 break;
1603         }
1604
1605         hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE8021X, hlevel, "%s",
1606                        txt);
1607 #endif /* CONFIG_NO_HOSTAPD_LOGGER */
1608 }
1609
1610
1611 static void ieee802_1x_set_port_authorized(void *ctx, void *sta_ctx,
1612                                            int authorized)
1613 {
1614         struct hostapd_data *hapd = ctx;
1615         struct sta_info *sta = sta_ctx;
1616         ieee802_1x_set_sta_authorized(hapd, sta, authorized);
1617 }
1618
1619
1620 static void _ieee802_1x_abort_auth(void *ctx, void *sta_ctx)
1621 {
1622         struct hostapd_data *hapd = ctx;
1623         struct sta_info *sta = sta_ctx;
1624         ieee802_1x_abort_auth(hapd, sta);
1625 }
1626
1627
1628 static void _ieee802_1x_tx_key(void *ctx, void *sta_ctx)
1629 {
1630         struct hostapd_data *hapd = ctx;
1631         struct sta_info *sta = sta_ctx;
1632         ieee802_1x_tx_key(hapd, sta);
1633 }
1634
1635
1636 int ieee802_1x_init(struct hostapd_data *hapd)
1637 {
1638         int i;
1639         struct eapol_auth_config conf;
1640         struct eapol_auth_cb cb;
1641
1642         os_memset(&conf, 0, sizeof(conf));
1643         conf.hapd = hapd;
1644         conf.eap_reauth_period = hapd->conf->eap_reauth_period;
1645         conf.wpa = hapd->conf->wpa;
1646         conf.individual_wep_key_len = hapd->conf->individual_wep_key_len;
1647         conf.eap_server = hapd->conf->eap_server;
1648         conf.ssl_ctx = hapd->ssl_ctx;
1649         conf.eap_sim_db_priv = hapd->eap_sim_db_priv;
1650         conf.eap_req_id_text = hapd->conf->eap_req_id_text;
1651         conf.eap_req_id_text_len = hapd->conf->eap_req_id_text_len;
1652         conf.pac_opaque_encr_key = hapd->conf->pac_opaque_encr_key;
1653         conf.eap_fast_a_id = hapd->conf->eap_fast_a_id;
1654         conf.eap_fast_a_id_len = hapd->conf->eap_fast_a_id_len;
1655         conf.eap_fast_a_id_info = hapd->conf->eap_fast_a_id_info;
1656         conf.eap_fast_prov = hapd->conf->eap_fast_prov;
1657         conf.pac_key_lifetime = hapd->conf->pac_key_lifetime;
1658         conf.pac_key_refresh_time = hapd->conf->pac_key_refresh_time;
1659         conf.eap_sim_aka_result_ind = hapd->conf->eap_sim_aka_result_ind;
1660         conf.tnc = hapd->conf->tnc;
1661         conf.wps = hapd->wps;
1662
1663         os_memset(&cb, 0, sizeof(cb));
1664         cb.eapol_send = ieee802_1x_eapol_send;
1665         cb.aaa_send = ieee802_1x_aaa_send;
1666         cb.finished = _ieee802_1x_finished;
1667         cb.get_eap_user = ieee802_1x_get_eap_user;
1668         cb.sta_entry_alive = ieee802_1x_sta_entry_alive;
1669         cb.logger = ieee802_1x_logger;
1670         cb.set_port_authorized = ieee802_1x_set_port_authorized;
1671         cb.abort_auth = _ieee802_1x_abort_auth;
1672         cb.tx_key = _ieee802_1x_tx_key;
1673
1674         hapd->eapol_auth = eapol_auth_init(&conf, &cb);
1675         if (hapd->eapol_auth == NULL)
1676                 return -1;
1677
1678         if ((hapd->conf->ieee802_1x || hapd->conf->wpa) &&
1679             hostapd_set_ieee8021x(hapd->conf->iface, hapd, 1))
1680                 return -1;
1681
1682 #ifndef CONFIG_NO_RADIUS
1683         if (radius_client_register(hapd->radius, RADIUS_AUTH,
1684                                    ieee802_1x_receive_auth, hapd))
1685                 return -1;
1686 #endif /* CONFIG_NO_RADIUS */
1687
1688         if (hapd->conf->default_wep_key_len) {
1689                 hostapd_set_privacy(hapd, 1);
1690
1691                 for (i = 0; i < 4; i++)
1692                         hostapd_set_encryption(hapd->conf->iface, hapd,
1693                                                "none", NULL, i, NULL, 0, 0);
1694
1695                 ieee802_1x_rekey(hapd, NULL);
1696
1697                 if (hapd->default_wep_key == NULL)
1698                         return -1;
1699         }
1700
1701         return 0;
1702 }
1703
1704
1705 void ieee802_1x_deinit(struct hostapd_data *hapd)
1706 {
1707         eloop_cancel_timeout(ieee802_1x_rekey, hapd, NULL);
1708
1709         if (hapd->driver != NULL &&
1710             (hapd->conf->ieee802_1x || hapd->conf->wpa))
1711                 hostapd_set_ieee8021x(hapd->conf->iface, hapd, 0);
1712
1713         eapol_auth_deinit(hapd->eapol_auth);
1714         hapd->eapol_auth = NULL;
1715 }
1716
1717
1718 int ieee802_1x_reconfig(struct hostapd_data *hapd, 
1719                         struct hostapd_config *oldconf,
1720                         struct hostapd_bss_config *oldbss)
1721 {
1722         ieee802_1x_deinit(hapd);
1723         return ieee802_1x_init(hapd);
1724 }
1725
1726
1727 int ieee802_1x_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
1728                          const u8 *buf, size_t len, int ack)
1729 {
1730         struct ieee80211_hdr *hdr;
1731         struct ieee802_1x_hdr *xhdr;
1732         struct ieee802_1x_eapol_key *key;
1733         u8 *pos;
1734         const unsigned char rfc1042_hdr[ETH_ALEN] =
1735                 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
1736
1737         if (sta == NULL)
1738                 return -1;
1739         if (len < sizeof(*hdr) + sizeof(rfc1042_hdr) + 2 + sizeof(*xhdr))
1740                 return 0;
1741
1742         hdr = (struct ieee80211_hdr *) buf;
1743         pos = (u8 *) (hdr + 1);
1744         if (os_memcmp(pos, rfc1042_hdr, sizeof(rfc1042_hdr)) != 0)
1745                 return 0;
1746         pos += sizeof(rfc1042_hdr);
1747         if (WPA_GET_BE16(pos) != ETH_P_PAE)
1748                 return 0;
1749         pos += 2;
1750
1751         xhdr = (struct ieee802_1x_hdr *) pos;
1752         pos += sizeof(*xhdr);
1753
1754         wpa_printf(MSG_DEBUG, "IEEE 802.1X: " MACSTR " TX status - version=%d "
1755                    "type=%d length=%d - ack=%d",
1756                    MAC2STR(sta->addr), xhdr->version, xhdr->type,
1757                    be_to_host16(xhdr->length), ack);
1758
1759         /* EAPOL EAP-Packet packets are eventually re-sent by either Supplicant
1760          * or Authenticator state machines, but EAPOL-Key packets are not
1761          * retransmitted in case of failure. Try to re-sent failed EAPOL-Key
1762          * packets couple of times because otherwise STA keys become
1763          * unsynchronized with AP. */
1764         if (xhdr->type == IEEE802_1X_TYPE_EAPOL_KEY && !ack &&
1765             pos + sizeof(*key) <= buf + len) {
1766                 key = (struct ieee802_1x_eapol_key *) pos;
1767                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1768                                HOSTAPD_LEVEL_DEBUG, "did not Ack EAPOL-Key "
1769                                "frame (%scast index=%d)",
1770                                key->key_index & BIT(7) ? "uni" : "broad",
1771                                key->key_index & ~BIT(7));
1772                 /* TODO: re-send EAPOL-Key couple of times (with short delay
1773                  * between them?). If all attempt fail, report error and
1774                  * deauthenticate STA so that it will get new keys when
1775                  * authenticating again (e.g., after returning in range).
1776                  * Separate limit/transmit state needed both for unicast and
1777                  * broadcast keys(?) */
1778         }
1779         /* TODO: could move unicast key configuration from ieee802_1x_tx_key()
1780          * to here and change the key only if the EAPOL-Key packet was Acked.
1781          */
1782
1783         return 1;
1784 }
1785
1786
1787 u8 * ieee802_1x_get_identity(struct eapol_state_machine *sm, size_t *len)
1788 {
1789         if (sm == NULL || sm->identity == NULL)
1790                 return NULL;
1791
1792         *len = sm->identity_len;
1793         return sm->identity;
1794 }
1795
1796
1797 u8 * ieee802_1x_get_radius_class(struct eapol_state_machine *sm, size_t *len,
1798                                  int idx)
1799 {
1800         if (sm == NULL || sm->radius_class.attr == NULL ||
1801             idx >= (int) sm->radius_class.count)
1802                 return NULL;
1803
1804         *len = sm->radius_class.attr[idx].len;
1805         return sm->radius_class.attr[idx].data;
1806 }
1807
1808
1809 const u8 * ieee802_1x_get_key(struct eapol_state_machine *sm, size_t *len)
1810 {
1811         if (sm == NULL)
1812                 return NULL;
1813
1814         *len = sm->eap_if->eapKeyDataLen;
1815         return sm->eap_if->eapKeyData;
1816 }
1817
1818
1819 void ieee802_1x_notify_port_enabled(struct eapol_state_machine *sm,
1820                                     int enabled)
1821 {
1822         if (sm == NULL)
1823                 return;
1824         sm->eap_if->portEnabled = enabled ? TRUE : FALSE;
1825         eapol_auth_step(sm);
1826 }
1827
1828
1829 void ieee802_1x_notify_port_valid(struct eapol_state_machine *sm,
1830                                   int valid)
1831 {
1832         if (sm == NULL)
1833                 return;
1834         sm->portValid = valid ? TRUE : FALSE;
1835         eapol_auth_step(sm);
1836 }
1837
1838
1839 void ieee802_1x_notify_pre_auth(struct eapol_state_machine *sm, int pre_auth)
1840 {
1841         if (sm == NULL)
1842                 return;
1843         if (pre_auth)
1844                 sm->flags |= EAPOL_SM_PREAUTH;
1845         else
1846                 sm->flags &= ~EAPOL_SM_PREAUTH;
1847 }
1848
1849
1850 static const char * bool_txt(Boolean bool)
1851 {
1852         return bool ? "TRUE" : "FALSE";
1853 }
1854
1855
1856 int ieee802_1x_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
1857 {
1858         /* TODO */
1859         return 0;
1860 }
1861
1862
1863 int ieee802_1x_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
1864                            char *buf, size_t buflen)
1865 {
1866         int len = 0, ret;
1867         struct eapol_state_machine *sm = sta->eapol_sm;
1868
1869         if (sm == NULL)
1870                 return 0;
1871
1872         ret = os_snprintf(buf + len, buflen - len,
1873                           "dot1xPaePortNumber=%d\n"
1874                           "dot1xPaePortProtocolVersion=%d\n"
1875                           "dot1xPaePortCapabilities=1\n"
1876                           "dot1xPaePortInitialize=%d\n"
1877                           "dot1xPaePortReauthenticate=FALSE\n",
1878                           sta->aid,
1879                           EAPOL_VERSION,
1880                           sm->initialize);
1881         if (ret < 0 || (size_t) ret >= buflen - len)
1882                 return len;
1883         len += ret;
1884
1885         /* dot1xAuthConfigTable */
1886         ret = os_snprintf(buf + len, buflen - len,
1887                           "dot1xAuthPaeState=%d\n"
1888                           "dot1xAuthBackendAuthState=%d\n"
1889                           "dot1xAuthAdminControlledDirections=%d\n"
1890                           "dot1xAuthOperControlledDirections=%d\n"
1891                           "dot1xAuthAuthControlledPortStatus=%d\n"
1892                           "dot1xAuthAuthControlledPortControl=%d\n"
1893                           "dot1xAuthQuietPeriod=%u\n"
1894                           "dot1xAuthServerTimeout=%u\n"
1895                           "dot1xAuthReAuthPeriod=%u\n"
1896                           "dot1xAuthReAuthEnabled=%s\n"
1897                           "dot1xAuthKeyTxEnabled=%s\n",
1898                           sm->auth_pae_state + 1,
1899                           sm->be_auth_state + 1,
1900                           sm->adminControlledDirections,
1901                           sm->operControlledDirections,
1902                           sm->authPortStatus,
1903                           sm->portControl,
1904                           sm->quietPeriod,
1905                           sm->serverTimeout,
1906                           sm->reAuthPeriod,
1907                           bool_txt(sm->reAuthEnabled),
1908                           bool_txt(sm->keyTxEnabled));
1909         if (ret < 0 || (size_t) ret >= buflen - len)
1910                 return len;
1911         len += ret;
1912
1913         /* dot1xAuthStatsTable */
1914         ret = os_snprintf(buf + len, buflen - len,
1915                           "dot1xAuthEapolFramesRx=%u\n"
1916                           "dot1xAuthEapolFramesTx=%u\n"
1917                           "dot1xAuthEapolStartFramesRx=%u\n"
1918                           "dot1xAuthEapolLogoffFramesRx=%u\n"
1919                           "dot1xAuthEapolRespIdFramesRx=%u\n"
1920                           "dot1xAuthEapolRespFramesRx=%u\n"
1921                           "dot1xAuthEapolReqIdFramesTx=%u\n"
1922                           "dot1xAuthEapolReqFramesTx=%u\n"
1923                           "dot1xAuthInvalidEapolFramesRx=%u\n"
1924                           "dot1xAuthEapLengthErrorFramesRx=%u\n"
1925                           "dot1xAuthLastEapolFrameVersion=%u\n"
1926                           "dot1xAuthLastEapolFrameSource=" MACSTR "\n",
1927                           sm->dot1xAuthEapolFramesRx,
1928                           sm->dot1xAuthEapolFramesTx,
1929                           sm->dot1xAuthEapolStartFramesRx,
1930                           sm->dot1xAuthEapolLogoffFramesRx,
1931                           sm->dot1xAuthEapolRespIdFramesRx,
1932                           sm->dot1xAuthEapolRespFramesRx,
1933                           sm->dot1xAuthEapolReqIdFramesTx,
1934                           sm->dot1xAuthEapolReqFramesTx,
1935                           sm->dot1xAuthInvalidEapolFramesRx,
1936                           sm->dot1xAuthEapLengthErrorFramesRx,
1937                           sm->dot1xAuthLastEapolFrameVersion,
1938                           MAC2STR(sm->addr));
1939         if (ret < 0 || (size_t) ret >= buflen - len)
1940                 return len;
1941         len += ret;
1942
1943         /* dot1xAuthDiagTable */
1944         ret = os_snprintf(buf + len, buflen - len,
1945                           "dot1xAuthEntersConnecting=%u\n"
1946                           "dot1xAuthEapLogoffsWhileConnecting=%u\n"
1947                           "dot1xAuthEntersAuthenticating=%u\n"
1948                           "dot1xAuthAuthSuccessesWhileAuthenticating=%u\n"
1949                           "dot1xAuthAuthTimeoutsWhileAuthenticating=%u\n"
1950                           "dot1xAuthAuthFailWhileAuthenticating=%u\n"
1951                           "dot1xAuthAuthEapStartsWhileAuthenticating=%u\n"
1952                           "dot1xAuthAuthEapLogoffWhileAuthenticating=%u\n"
1953                           "dot1xAuthAuthReauthsWhileAuthenticated=%u\n"
1954                           "dot1xAuthAuthEapStartsWhileAuthenticated=%u\n"
1955                           "dot1xAuthAuthEapLogoffWhileAuthenticated=%u\n"
1956                           "dot1xAuthBackendResponses=%u\n"
1957                           "dot1xAuthBackendAccessChallenges=%u\n"
1958                           "dot1xAuthBackendOtherRequestsToSupplicant=%u\n"
1959                           "dot1xAuthBackendAuthSuccesses=%u\n"
1960                           "dot1xAuthBackendAuthFails=%u\n",
1961                           sm->authEntersConnecting,
1962                           sm->authEapLogoffsWhileConnecting,
1963                           sm->authEntersAuthenticating,
1964                           sm->authAuthSuccessesWhileAuthenticating,
1965                           sm->authAuthTimeoutsWhileAuthenticating,
1966                           sm->authAuthFailWhileAuthenticating,
1967                           sm->authAuthEapStartsWhileAuthenticating,
1968                           sm->authAuthEapLogoffWhileAuthenticating,
1969                           sm->authAuthReauthsWhileAuthenticated,
1970                           sm->authAuthEapStartsWhileAuthenticated,
1971                           sm->authAuthEapLogoffWhileAuthenticated,
1972                           sm->backendResponses,
1973                           sm->backendAccessChallenges,
1974                           sm->backendOtherRequestsToSupplicant,
1975                           sm->backendAuthSuccesses,
1976                           sm->backendAuthFails);
1977         if (ret < 0 || (size_t) ret >= buflen - len)
1978                 return len;
1979         len += ret;
1980
1981         /* dot1xAuthSessionStatsTable */
1982         ret = os_snprintf(buf + len, buflen - len,
1983                           /* TODO: dot1xAuthSessionOctetsRx */
1984                           /* TODO: dot1xAuthSessionOctetsTx */
1985                           /* TODO: dot1xAuthSessionFramesRx */
1986                           /* TODO: dot1xAuthSessionFramesTx */
1987                           "dot1xAuthSessionId=%08X-%08X\n"
1988                           "dot1xAuthSessionAuthenticMethod=%d\n"
1989                           "dot1xAuthSessionTime=%u\n"
1990                           "dot1xAuthSessionTerminateCause=999\n"
1991                           "dot1xAuthSessionUserName=%s\n",
1992                           sta->acct_session_id_hi, sta->acct_session_id_lo,
1993                           (wpa_key_mgmt_wpa_ieee8021x(
1994                                    wpa_auth_sta_key_mgmt(sta->wpa_sm))) ?
1995                           1 : 2,
1996                           (unsigned int) (time(NULL) -
1997                                           sta->acct_session_start),
1998                           sm->identity);
1999         if (ret < 0 || (size_t) ret >= buflen - len)
2000                 return len;
2001         len += ret;
2002
2003         return len;
2004 }
2005
2006
2007 static void ieee802_1x_finished(struct hostapd_data *hapd,
2008                                 struct sta_info *sta, int success)
2009 {
2010         const u8 *key;
2011         size_t len;
2012         /* TODO: get PMKLifetime from WPA parameters */
2013         static const int dot11RSNAConfigPMKLifetime = 43200;
2014
2015         key = ieee802_1x_get_key(sta->eapol_sm, &len);
2016         if (success && key && len >= PMK_LEN &&
2017             wpa_auth_pmksa_add(sta->wpa_sm, key, dot11RSNAConfigPMKLifetime,
2018                                sta->eapol_sm) == 0) {
2019                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
2020                                HOSTAPD_LEVEL_DEBUG,
2021                                "Added PMKSA cache entry (IEEE 802.1X)");
2022         }
2023 }