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dbus: Share the same function for type to type-as-string conversion
[hostap-gosc2009.git] / src / rsn_supp / wpa.c
blob78ec079c85214d4d0310be48383554c4359f5caa
1 /*
2 * WPA Supplicant - WPA state machine and EAPOL-Key processing
3 * Copyright (c) 2003-2008, 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 "common.h"
18 #include "crypto/aes_wrap.h"
19 #include "crypto/crypto.h"
20 #include "common/ieee802_11_defs.h"
21 #include "eapol_supp/eapol_supp_sm.h"
22 #include "wpa.h"
23 #include "eloop.h"
24 #include "preauth.h"
25 #include "pmksa_cache.h"
26 #include "wpa_i.h"
27 #include "wpa_ie.h"
28 #include "peerkey.h"
29
30
31 /**
32 * wpa_eapol_key_send - Send WPA/RSN EAPOL-Key message
33 * @sm: Pointer to WPA state machine data from wpa_sm_init()
34 * @kck: Key Confirmation Key (KCK, part of PTK)
35 * @ver: Version field from Key Info
36 * @dest: Destination address for the frame
37 * @proto: Ethertype (usually ETH_P_EAPOL)
38 * @msg: EAPOL-Key message
39 * @msg_len: Length of message
40 * @key_mic: Pointer to the buffer to which the EAPOL-Key MIC is written
41 */
42 void wpa_eapol_key_send(struct wpa_sm *sm, const u8 *kck,
43 int ver, const u8 *dest, u16 proto,
44 u8 *msg, size_t msg_len, u8 *key_mic)
45 {
46 if (is_zero_ether_addr(dest) && is_zero_ether_addr(sm->bssid)) {
47 /*
48 * Association event was not yet received; try to fetch
49 * BSSID from the driver.
50 */
51 if (wpa_sm_get_bssid(sm, sm->bssid) < 0) {
52 wpa_printf(MSG_DEBUG, "WPA: Failed to read BSSID for "
53 "EAPOL-Key destination address");
54 } else {
55 dest = sm->bssid;
56 wpa_printf(MSG_DEBUG, "WPA: Use BSSID (" MACSTR
57 ") as the destination for EAPOL-Key",
58 MAC2STR(dest));
59 }
60 }
61 if (key_mic &&
62 wpa_eapol_key_mic(kck, ver, msg, msg_len, key_mic)) {
63 wpa_printf(MSG_ERROR, "WPA: Failed to generate EAPOL-Key "
64 "version %d MIC", ver);
65 goto out;
66 }
67 wpa_hexdump(MSG_MSGDUMP, "WPA: TX EAPOL-Key", msg, msg_len);
68 wpa_sm_ether_send(sm, dest, proto, msg, msg_len);
69 eapol_sm_notify_tx_eapol_key(sm->eapol);
70 out:
71 os_free(msg);
72 }
73
74
75 /**
76 * wpa_sm_key_request - Send EAPOL-Key Request
77 * @sm: Pointer to WPA state machine data from wpa_sm_init()
78 * @error: Indicate whether this is an Michael MIC error report
79 * @pairwise: 1 = error report for pairwise packet, 0 = for group packet
80 *
81 * Send an EAPOL-Key Request to the current authenticator. This function is
82 * used to request rekeying and it is usually called when a local Michael MIC
83 * failure is detected.
84 */
85 void wpa_sm_key_request(struct wpa_sm *sm, int error, int pairwise)
86 {
87 size_t rlen;
88 struct wpa_eapol_key *reply;
89 int key_info, ver;
90 u8 bssid[ETH_ALEN], *rbuf;
91
92 if (wpa_key_mgmt_ft(sm->key_mgmt) || wpa_key_mgmt_sha256(sm->key_mgmt))
93 ver = WPA_KEY_INFO_TYPE_AES_128_CMAC;
94 else if (sm->pairwise_cipher == WPA_CIPHER_CCMP)
95 ver = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES;
96 else
97 ver = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4;
98
99 if (wpa_sm_get_bssid(sm, bssid) < 0) {
100 wpa_printf(MSG_WARNING, "Failed to read BSSID for EAPOL-Key "
101 "request");
102 return;
103 }
104
105 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL,
106 sizeof(*reply), &rlen, (void *) &reply);
107 if (rbuf == NULL)
108 return;
109
110 reply->type = sm->proto == WPA_PROTO_RSN ?
111 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
112 key_info = WPA_KEY_INFO_REQUEST | ver;
113 if (sm->ptk_set)
114 key_info |= WPA_KEY_INFO_MIC;
115 if (error)
116 key_info |= WPA_KEY_INFO_ERROR;
117 if (pairwise)
118 key_info |= WPA_KEY_INFO_KEY_TYPE;
119 WPA_PUT_BE16(reply->key_info, key_info);
120 WPA_PUT_BE16(reply->key_length, 0);
121 os_memcpy(reply->replay_counter, sm->request_counter,
122 WPA_REPLAY_COUNTER_LEN);
123 inc_byte_array(sm->request_counter, WPA_REPLAY_COUNTER_LEN);
124
125 WPA_PUT_BE16(reply->key_data_length, 0);
126
127 wpa_printf(MSG_INFO, "WPA: Sending EAPOL-Key Request (error=%d "
128 "pairwise=%d ptk_set=%d len=%lu)",
129 error, pairwise, sm->ptk_set, (unsigned long) rlen);
130 wpa_eapol_key_send(sm, sm->ptk.kck, ver, bssid, ETH_P_EAPOL,
131 rbuf, rlen, key_info & WPA_KEY_INFO_MIC ?
132 reply->key_mic : NULL);
133 }
134
135
136 static int wpa_supplicant_get_pmk(struct wpa_sm *sm,
137 const unsigned char *src_addr,
138 const u8 *pmkid)
139 {
140 int abort_cached = 0;
141
142 if (pmkid && !sm->cur_pmksa) {
143 /* When using drivers that generate RSN IE, wpa_supplicant may
144 * not have enough time to get the association information
145 * event before receiving this 1/4 message, so try to find a
146 * matching PMKSA cache entry here. */
147 sm->cur_pmksa = pmksa_cache_get(sm->pmksa, src_addr, pmkid);
148 if (sm->cur_pmksa) {
149 wpa_printf(MSG_DEBUG, "RSN: found matching PMKID from "
150 "PMKSA cache");
151 } else {
152 wpa_printf(MSG_DEBUG, "RSN: no matching PMKID found");
153 abort_cached = 1;
154 }
155 }
156
157 if (pmkid && sm->cur_pmksa &&
158 os_memcmp(pmkid, sm->cur_pmksa->pmkid, PMKID_LEN) == 0) {
159 wpa_hexdump(MSG_DEBUG, "RSN: matched PMKID", pmkid, PMKID_LEN);
160 wpa_sm_set_pmk_from_pmksa(sm);
161 wpa_hexdump_key(MSG_DEBUG, "RSN: PMK from PMKSA cache",
162 sm->pmk, sm->pmk_len);
163 eapol_sm_notify_cached(sm->eapol);
164 #ifdef CONFIG_IEEE80211R
165 sm->xxkey_len = 0;
166 #endif /* CONFIG_IEEE80211R */
167 } else if (wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt) && sm->eapol) {
168 int res, pmk_len;
169 pmk_len = PMK_LEN;
170 res = eapol_sm_get_key(sm->eapol, sm->pmk, PMK_LEN);
171 if (res) {
172 /*
173 * EAP-LEAP is an exception from other EAP methods: it
174 * uses only 16-byte PMK.
175 */
176 res = eapol_sm_get_key(sm->eapol, sm->pmk, 16);
177 pmk_len = 16;
178 } else {
179 #ifdef CONFIG_IEEE80211R
180 u8 buf[2 * PMK_LEN];
181 if (eapol_sm_get_key(sm->eapol, buf, 2 * PMK_LEN) == 0)
182 {
183 os_memcpy(sm->xxkey, buf + PMK_LEN, PMK_LEN);
184 sm->xxkey_len = PMK_LEN;
185 os_memset(buf, 0, sizeof(buf));
186 }
187 #endif /* CONFIG_IEEE80211R */
188 }
189 if (res == 0) {
190 wpa_hexdump_key(MSG_DEBUG, "WPA: PMK from EAPOL state "
191 "machines", sm->pmk, pmk_len);
192 sm->pmk_len = pmk_len;
193 if (sm->proto == WPA_PROTO_RSN) {
194 pmksa_cache_add(sm->pmksa, sm->pmk, pmk_len,
195 src_addr, sm->own_addr,
196 sm->network_ctx, sm->key_mgmt);
197 }
198 if (!sm->cur_pmksa && pmkid &&
199 pmksa_cache_get(sm->pmksa, src_addr, pmkid)) {
200 wpa_printf(MSG_DEBUG, "RSN: the new PMK "
201 "matches with the PMKID");
202 abort_cached = 0;
203 }
204 } else {
205 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
206 "WPA: Failed to get master session key from "
207 "EAPOL state machines");
208 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
209 "WPA: Key handshake aborted");
210 if (sm->cur_pmksa) {
211 wpa_printf(MSG_DEBUG, "RSN: Cancelled PMKSA "
212 "caching attempt");
213 sm->cur_pmksa = NULL;
214 abort_cached = 1;
215 } else if (!abort_cached) {
216 return -1;
217 }
218 }
219 }
220
221 if (abort_cached && wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt)) {
222 /* Send EAPOL-Start to trigger full EAP authentication. */
223 u8 *buf;
224 size_t buflen;
225
226 wpa_printf(MSG_DEBUG, "RSN: no PMKSA entry found - trigger "
227 "full EAP authentication");
228 buf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_START,
229 NULL, 0, &buflen, NULL);
230 if (buf) {
231 wpa_sm_ether_send(sm, sm->bssid, ETH_P_EAPOL,
232 buf, buflen);
233 os_free(buf);
234 }
235
236 return -1;
237 }
238
239 return 0;
240 }
241
242
243 /**
244 * wpa_supplicant_send_2_of_4 - Send message 2 of WPA/RSN 4-Way Handshake
245 * @sm: Pointer to WPA state machine data from wpa_sm_init()
246 * @dst: Destination address for the frame
247 * @key: Pointer to the EAPOL-Key frame header
248 * @ver: Version bits from EAPOL-Key Key Info
249 * @nonce: Nonce value for the EAPOL-Key frame
250 * @wpa_ie: WPA/RSN IE
251 * @wpa_ie_len: Length of the WPA/RSN IE
252 * @ptk: PTK to use for keyed hash and encryption
253 * Returns: 0 on success, -1 on failure
254 */
255 int wpa_supplicant_send_2_of_4(struct wpa_sm *sm, const unsigned char *dst,
256 const struct wpa_eapol_key *key,
257 int ver, const u8 *nonce,
258 const u8 *wpa_ie, size_t wpa_ie_len,
259 struct wpa_ptk *ptk)
260 {
261 size_t rlen;
262 struct wpa_eapol_key *reply;
263 u8 *rbuf;
264
265 if (wpa_ie == NULL) {
266 wpa_printf(MSG_WARNING, "WPA: No wpa_ie set - cannot "
267 "generate msg 2/4");
268 return -1;
269 }
270
271 wpa_hexdump(MSG_DEBUG, "WPA: WPA IE for msg 2/4", wpa_ie, wpa_ie_len);
272
273 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY,
274 NULL, sizeof(*reply) + wpa_ie_len,
275 &rlen, (void *) &reply);
276 if (rbuf == NULL)
277 return -1;
278
279 reply->type = sm->proto == WPA_PROTO_RSN ?
280 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
281 WPA_PUT_BE16(reply->key_info,
282 ver | WPA_KEY_INFO_KEY_TYPE | WPA_KEY_INFO_MIC);
283 if (sm->proto == WPA_PROTO_RSN)
284 WPA_PUT_BE16(reply->key_length, 0);
285 else
286 os_memcpy(reply->key_length, key->key_length, 2);
287 os_memcpy(reply->replay_counter, key->replay_counter,
288 WPA_REPLAY_COUNTER_LEN);
289
290 WPA_PUT_BE16(reply->key_data_length, wpa_ie_len);
291 os_memcpy(reply + 1, wpa_ie, wpa_ie_len);
292
293 os_memcpy(reply->key_nonce, nonce, WPA_NONCE_LEN);
294
295 wpa_printf(MSG_DEBUG, "WPA: Sending EAPOL-Key 2/4");
296 wpa_eapol_key_send(sm, ptk->kck, ver, dst, ETH_P_EAPOL,
297 rbuf, rlen, reply->key_mic);
298
299 return 0;
300 }
301
302
303 static int wpa_derive_ptk(struct wpa_sm *sm, const unsigned char *src_addr,
304 const struct wpa_eapol_key *key,
305 struct wpa_ptk *ptk)
306 {
307 size_t ptk_len = sm->pairwise_cipher == WPA_CIPHER_CCMP ? 48 : 64;
308 #ifdef CONFIG_IEEE80211R
309 if (wpa_key_mgmt_ft(sm->key_mgmt))
310 return wpa_derive_ptk_ft(sm, src_addr, key, ptk, ptk_len);
311 #endif /* CONFIG_IEEE80211R */
312
313 wpa_pmk_to_ptk(sm->pmk, sm->pmk_len, "Pairwise key expansion",
314 sm->own_addr, sm->bssid, sm->snonce, key->key_nonce,
315 (u8 *) ptk, ptk_len,
316 wpa_key_mgmt_sha256(sm->key_mgmt));
317 return 0;
318 }
319
320
321 static void wpa_supplicant_process_1_of_4(struct wpa_sm *sm,
322 const unsigned char *src_addr,
323 const struct wpa_eapol_key *key,
324 u16 ver)
325 {
326 struct wpa_eapol_ie_parse ie;
327 struct wpa_ptk *ptk;
328 u8 buf[8];
329
330 if (wpa_sm_get_network_ctx(sm) == NULL) {
331 wpa_printf(MSG_WARNING, "WPA: No SSID info found (msg 1 of "
332 "4).");
333 return;
334 }
335
336 wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE);
337 wpa_printf(MSG_DEBUG, "WPA: RX message 1 of 4-Way Handshake from "
338 MACSTR " (ver=%d)", MAC2STR(src_addr), ver);
339
340 os_memset(&ie, 0, sizeof(ie));
341
342 #ifndef CONFIG_NO_WPA2
343 if (sm->proto == WPA_PROTO_RSN) {
344 /* RSN: msg 1/4 should contain PMKID for the selected PMK */
345 const u8 *_buf = (const u8 *) (key + 1);
346 size_t len = WPA_GET_BE16(key->key_data_length);
347 wpa_hexdump(MSG_DEBUG, "RSN: msg 1/4 key data", _buf, len);
348 wpa_supplicant_parse_ies(_buf, len, &ie);
349 if (ie.pmkid) {
350 wpa_hexdump(MSG_DEBUG, "RSN: PMKID from "
351 "Authenticator", ie.pmkid, PMKID_LEN);
352 }
353 }
354 #endif /* CONFIG_NO_WPA2 */
355
356 if (wpa_supplicant_get_pmk(sm, src_addr, ie.pmkid))
357 goto failed;
358
359 if (sm->renew_snonce) {
360 if (os_get_random(sm->snonce, WPA_NONCE_LEN)) {
361 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
362 "WPA: Failed to get random data for SNonce");
363 goto failed;
364 }
365 sm->renew_snonce = 0;
366 wpa_hexdump(MSG_DEBUG, "WPA: Renewed SNonce",
367 sm->snonce, WPA_NONCE_LEN);
368 }
369
370 /* Calculate PTK which will be stored as a temporary PTK until it has
371 * been verified when processing message 3/4. */
372 ptk = &sm->tptk;
373 wpa_derive_ptk(sm, src_addr, key, ptk);
374 /* Supplicant: swap tx/rx Mic keys */
375 os_memcpy(buf, ptk->u.auth.tx_mic_key, 8);
376 os_memcpy(ptk->u.auth.tx_mic_key, ptk->u.auth.rx_mic_key, 8);
377 os_memcpy(ptk->u.auth.rx_mic_key, buf, 8);
378 sm->tptk_set = 1;
379
380 if (wpa_supplicant_send_2_of_4(sm, sm->bssid, key, ver, sm->snonce,
381 sm->assoc_wpa_ie, sm->assoc_wpa_ie_len,
382 ptk))
383 goto failed;
384
385 os_memcpy(sm->anonce, key->key_nonce, WPA_NONCE_LEN);
386 return;
387
388 failed:
389 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED);
390 }
391
392
393 static void wpa_sm_start_preauth(void *eloop_ctx, void *timeout_ctx)
394 {
395 struct wpa_sm *sm = eloop_ctx;
396 rsn_preauth_candidate_process(sm);
397 }
398
399
400 static void wpa_supplicant_key_neg_complete(struct wpa_sm *sm,
401 const u8 *addr, int secure)
402 {
403 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
404 "WPA: Key negotiation completed with "
405 MACSTR " [PTK=%s GTK=%s]", MAC2STR(addr),
406 wpa_cipher_txt(sm->pairwise_cipher),
407 wpa_cipher_txt(sm->group_cipher));
408 wpa_sm_cancel_auth_timeout(sm);
409 wpa_sm_set_state(sm, WPA_COMPLETED);
410
411 if (secure) {
412 wpa_sm_mlme_setprotection(
413 sm, addr, MLME_SETPROTECTION_PROTECT_TYPE_RX_TX,
414 MLME_SETPROTECTION_KEY_TYPE_PAIRWISE);
415 eapol_sm_notify_portValid(sm->eapol, TRUE);
416 if (wpa_key_mgmt_wpa_psk(sm->key_mgmt))
417 eapol_sm_notify_eap_success(sm->eapol, TRUE);
418 /*
419 * Start preauthentication after a short wait to avoid a
420 * possible race condition between the data receive and key
421 * configuration after the 4-Way Handshake. This increases the
422 * likelyhood of the first preauth EAPOL-Start frame getting to
423 * the target AP.
424 */
425 eloop_register_timeout(1, 0, wpa_sm_start_preauth, sm, NULL);
426 }
427
428 if (sm->cur_pmksa && sm->cur_pmksa->opportunistic) {
429 wpa_printf(MSG_DEBUG, "RSN: Authenticator accepted "
430 "opportunistic PMKSA entry - marking it valid");
431 sm->cur_pmksa->opportunistic = 0;
432 }
433
434 #ifdef CONFIG_IEEE80211R
435 if (wpa_key_mgmt_ft(sm->key_mgmt)) {
436 /* Prepare for the next transition */
437 wpa_ft_prepare_auth_request(sm);
438 }
439 #endif /* CONFIG_IEEE80211R */
440 }
441
442
443 static void wpa_sm_rekey_ptk(void *eloop_ctx, void *timeout_ctx)
444 {
445 struct wpa_sm *sm = eloop_ctx;
446 wpa_printf(MSG_DEBUG, "WPA: Request PTK rekeying");
447 wpa_sm_key_request(sm, 0, 1);
448 }
449
450
451 static int wpa_supplicant_install_ptk(struct wpa_sm *sm,
452 const struct wpa_eapol_key *key)
453 {
454 int keylen, rsclen;
455 enum wpa_alg alg;
456 const u8 *key_rsc;
457 u8 null_rsc[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
458
459 wpa_printf(MSG_DEBUG, "WPA: Installing PTK to the driver.");
460
461 switch (sm->pairwise_cipher) {
462 case WPA_CIPHER_CCMP:
463 alg = WPA_ALG_CCMP;
464 keylen = 16;
465 rsclen = 6;
466 break;
467 case WPA_CIPHER_TKIP:
468 alg = WPA_ALG_TKIP;
469 keylen = 32;
470 rsclen = 6;
471 break;
472 case WPA_CIPHER_NONE:
473 wpa_printf(MSG_DEBUG, "WPA: Pairwise Cipher Suite: "
474 "NONE - do not use pairwise keys");
475 return 0;
476 default:
477 wpa_printf(MSG_WARNING, "WPA: Unsupported pairwise cipher %d",
478 sm->pairwise_cipher);
479 return -1;
480 }
481
482 if (sm->proto == WPA_PROTO_RSN) {
483 key_rsc = null_rsc;
484 } else {
485 key_rsc = key->key_rsc;
486 wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, rsclen);
487 }
488
489 if (wpa_sm_set_key(sm, alg, sm->bssid, 0, 1, key_rsc, rsclen,
490 (u8 *) sm->ptk.tk1, keylen) < 0) {
491 wpa_printf(MSG_WARNING, "WPA: Failed to set PTK to the "
492 "driver (alg=%d keylen=%d bssid=" MACSTR ")",
493 alg, keylen, MAC2STR(sm->bssid));
494 return -1;
495 }
496
497 if (sm->wpa_ptk_rekey) {
498 eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL);
499 eloop_register_timeout(sm->wpa_ptk_rekey, 0, wpa_sm_rekey_ptk,
500 sm, NULL);
501 }
502
503 return 0;
504 }
505
506
507 static int wpa_supplicant_check_group_cipher(int group_cipher,
508 int keylen, int maxkeylen,
509 int *key_rsc_len,
510 enum wpa_alg *alg)
511 {
512 int ret = 0;
513
514 switch (group_cipher) {
515 case WPA_CIPHER_CCMP:
516 if (keylen != 16 || maxkeylen < 16) {
517 ret = -1;
518 break;
519 }
520 *key_rsc_len = 6;
521 *alg = WPA_ALG_CCMP;
522 break;
523 case WPA_CIPHER_TKIP:
524 if (keylen != 32 || maxkeylen < 32) {
525 ret = -1;
526 break;
527 }
528 *key_rsc_len = 6;
529 *alg = WPA_ALG_TKIP;
530 break;
531 case WPA_CIPHER_WEP104:
532 if (keylen != 13 || maxkeylen < 13) {
533 ret = -1;
534 break;
535 }
536 *key_rsc_len = 0;
537 *alg = WPA_ALG_WEP;
538 break;
539 case WPA_CIPHER_WEP40:
540 if (keylen != 5 || maxkeylen < 5) {
541 ret = -1;
542 break;
543 }
544 *key_rsc_len = 0;
545 *alg = WPA_ALG_WEP;
546 break;
547 default:
548 wpa_printf(MSG_WARNING, "WPA: Unsupported Group Cipher %d",
549 group_cipher);
550 return -1;
551 }
552
553 if (ret < 0 ) {
554 wpa_printf(MSG_WARNING, "WPA: Unsupported %s Group Cipher key "
555 "length %d (%d).",
556 wpa_cipher_txt(group_cipher), keylen, maxkeylen);
557 }
558
559 return ret;
560 }
561
562
563 struct wpa_gtk_data {
564 enum wpa_alg alg;
565 int tx, key_rsc_len, keyidx;
566 u8 gtk[32];
567 int gtk_len;
568 };
569
570
571 static int wpa_supplicant_install_gtk(struct wpa_sm *sm,
572 const struct wpa_gtk_data *gd,
573 const u8 *key_rsc)
574 {
575 const u8 *_gtk = gd->gtk;
576 u8 gtk_buf[32];
577
578 wpa_hexdump_key(MSG_DEBUG, "WPA: Group Key", gd->gtk, gd->gtk_len);
579 wpa_printf(MSG_DEBUG, "WPA: Installing GTK to the driver "
580 "(keyidx=%d tx=%d len=%d).", gd->keyidx, gd->tx,
581 gd->gtk_len);
582 wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, gd->key_rsc_len);
583 if (sm->group_cipher == WPA_CIPHER_TKIP) {
584 /* Swap Tx/Rx keys for Michael MIC */
585 os_memcpy(gtk_buf, gd->gtk, 16);
586 os_memcpy(gtk_buf + 16, gd->gtk + 24, 8);
587 os_memcpy(gtk_buf + 24, gd->gtk + 16, 8);
588 _gtk = gtk_buf;
589 }
590 if (sm->pairwise_cipher == WPA_CIPHER_NONE) {
591 if (wpa_sm_set_key(sm, gd->alg,
592 (u8 *) "\xff\xff\xff\xff\xff\xff",
593 gd->keyidx, 1, key_rsc, gd->key_rsc_len,
594 _gtk, gd->gtk_len) < 0) {
595 wpa_printf(MSG_WARNING, "WPA: Failed to set "
596 "GTK to the driver (Group only).");
597 return -1;
598 }
599 } else if (wpa_sm_set_key(sm, gd->alg,
600 (u8 *) "\xff\xff\xff\xff\xff\xff",
601 gd->keyidx, gd->tx, key_rsc, gd->key_rsc_len,
602 _gtk, gd->gtk_len) < 0) {
603 wpa_printf(MSG_WARNING, "WPA: Failed to set GTK to "
604 "the driver (alg=%d keylen=%d keyidx=%d)",
605 gd->alg, gd->gtk_len, gd->keyidx);
606 return -1;
607 }
608
609 return 0;
610 }
611
612
613 static int wpa_supplicant_gtk_tx_bit_workaround(const struct wpa_sm *sm,
614 int tx)
615 {
616 if (tx && sm->pairwise_cipher != WPA_CIPHER_NONE) {
617 /* Ignore Tx bit for GTK if a pairwise key is used. One AP
618 * seemed to set this bit (incorrectly, since Tx is only when
619 * doing Group Key only APs) and without this workaround, the
620 * data connection does not work because wpa_supplicant
621 * configured non-zero keyidx to be used for unicast. */
622 wpa_printf(MSG_INFO, "WPA: Tx bit set for GTK, but pairwise "
623 "keys are used - ignore Tx bit");
624 return 0;
625 }
626 return tx;
627 }
628
629
630 static int wpa_supplicant_pairwise_gtk(struct wpa_sm *sm,
631 const struct wpa_eapol_key *key,
632 const u8 *gtk, size_t gtk_len,
633 int key_info)
634 {
635 #ifndef CONFIG_NO_WPA2
636 struct wpa_gtk_data gd;
637
638 /*
639 * IEEE Std 802.11i-2004 - 8.5.2 EAPOL-Key frames - Figure 43x
640 * GTK KDE format:
641 * KeyID[bits 0-1], Tx [bit 2], Reserved [bits 3-7]
642 * Reserved [bits 0-7]
643 * GTK
644 */
645
646 os_memset(&gd, 0, sizeof(gd));
647 wpa_hexdump_key(MSG_DEBUG, "RSN: received GTK in pairwise handshake",
648 gtk, gtk_len);
649
650 if (gtk_len < 2 || gtk_len - 2 > sizeof(gd.gtk))
651 return -1;
652
653 gd.keyidx = gtk[0] & 0x3;
654 gd.tx = wpa_supplicant_gtk_tx_bit_workaround(sm,
655 !!(gtk[0] & BIT(2)));
656 gtk += 2;
657 gtk_len -= 2;
658
659 os_memcpy(gd.gtk, gtk, gtk_len);
660 gd.gtk_len = gtk_len;
661
662 if (wpa_supplicant_check_group_cipher(sm->group_cipher,
663 gtk_len, gtk_len,
664 &gd.key_rsc_len, &gd.alg) ||
665 wpa_supplicant_install_gtk(sm, &gd, key->key_rsc)) {
666 wpa_printf(MSG_DEBUG, "RSN: Failed to install GTK");
667 return -1;
668 }
669
670 wpa_supplicant_key_neg_complete(sm, sm->bssid,
671 key_info & WPA_KEY_INFO_SECURE);
672 return 0;
673 #else /* CONFIG_NO_WPA2 */
674 return -1;
675 #endif /* CONFIG_NO_WPA2 */
676 }
677
678
679 static int ieee80211w_set_keys(struct wpa_sm *sm,
680 struct wpa_eapol_ie_parse *ie)
681 {
682 #ifdef CONFIG_IEEE80211W
683 if (sm->mgmt_group_cipher != WPA_CIPHER_AES_128_CMAC)
684 return 0;
685
686 if (ie->igtk) {
687 const struct wpa_igtk_kde *igtk;
688 u16 keyidx;
689 if (ie->igtk_len != sizeof(*igtk))
690 return -1;
691 igtk = (const struct wpa_igtk_kde *) ie->igtk;
692 keyidx = WPA_GET_LE16(igtk->keyid);
693 wpa_printf(MSG_DEBUG, "WPA: IGTK keyid %d "
694 "pn %02x%02x%02x%02x%02x%02x",
695 keyidx, MAC2STR(igtk->pn));
696 wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK",
697 igtk->igtk, WPA_IGTK_LEN);
698 if (keyidx > 4095) {
699 wpa_printf(MSG_WARNING, "WPA: Invalid IGTK KeyID %d",
700 keyidx);
701 return -1;
702 }
703 if (wpa_sm_set_key(sm, WPA_ALG_IGTK,
704 (u8 *) "\xff\xff\xff\xff\xff\xff",
705 keyidx, 0, igtk->pn, sizeof(igtk->pn),
706 igtk->igtk, WPA_IGTK_LEN) < 0) {
707 wpa_printf(MSG_WARNING, "WPA: Failed to configure IGTK"
708 " to the driver");
709 return -1;
710 }
711 }
712
713 return 0;
714 #else /* CONFIG_IEEE80211W */
715 return 0;
716 #endif /* CONFIG_IEEE80211W */
717 }
718
719
720 static void wpa_report_ie_mismatch(struct wpa_sm *sm,
721 const char *reason, const u8 *src_addr,
722 const u8 *wpa_ie, size_t wpa_ie_len,
723 const u8 *rsn_ie, size_t rsn_ie_len)
724 {
725 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: %s (src=" MACSTR ")",
726 reason, MAC2STR(src_addr));
727
728 if (sm->ap_wpa_ie) {
729 wpa_hexdump(MSG_INFO, "WPA: WPA IE in Beacon/ProbeResp",
730 sm->ap_wpa_ie, sm->ap_wpa_ie_len);
731 }
732 if (wpa_ie) {
733 if (!sm->ap_wpa_ie) {
734 wpa_printf(MSG_INFO, "WPA: No WPA IE in "
735 "Beacon/ProbeResp");
736 }
737 wpa_hexdump(MSG_INFO, "WPA: WPA IE in 3/4 msg",
738 wpa_ie, wpa_ie_len);
739 }
740
741 if (sm->ap_rsn_ie) {
742 wpa_hexdump(MSG_INFO, "WPA: RSN IE in Beacon/ProbeResp",
743 sm->ap_rsn_ie, sm->ap_rsn_ie_len);
744 }
745 if (rsn_ie) {
746 if (!sm->ap_rsn_ie) {
747 wpa_printf(MSG_INFO, "WPA: No RSN IE in "
748 "Beacon/ProbeResp");
749 }
750 wpa_hexdump(MSG_INFO, "WPA: RSN IE in 3/4 msg",
751 rsn_ie, rsn_ie_len);
752 }
753
754 wpa_sm_disassociate(sm, WLAN_REASON_IE_IN_4WAY_DIFFERS);
755 }
756
757
758 static int wpa_supplicant_validate_ie(struct wpa_sm *sm,
759 const unsigned char *src_addr,
760 struct wpa_eapol_ie_parse *ie)
761 {
762 if (sm->ap_wpa_ie == NULL && sm->ap_rsn_ie == NULL) {
763 wpa_printf(MSG_DEBUG, "WPA: No WPA/RSN IE for this AP known. "
764 "Trying to get from scan results");
765 if (wpa_sm_get_beacon_ie(sm) < 0) {
766 wpa_printf(MSG_WARNING, "WPA: Could not find AP from "
767 "the scan results");
768 } else {
769 wpa_printf(MSG_DEBUG, "WPA: Found the current AP from "
770 "updated scan results");
771 }
772 }
773
774 if (ie->wpa_ie == NULL && ie->rsn_ie == NULL &&
775 (sm->ap_wpa_ie || sm->ap_rsn_ie)) {
776 wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match "
777 "with IE in Beacon/ProbeResp (no IE?)",
778 src_addr, ie->wpa_ie, ie->wpa_ie_len,
779 ie->rsn_ie, ie->rsn_ie_len);
780 return -1;
781 }
782
783 if ((ie->wpa_ie && sm->ap_wpa_ie &&
784 (ie->wpa_ie_len != sm->ap_wpa_ie_len ||
785 os_memcmp(ie->wpa_ie, sm->ap_wpa_ie, ie->wpa_ie_len) != 0)) ||
786 (ie->rsn_ie && sm->ap_rsn_ie &&
787 (ie->rsn_ie_len != sm->ap_rsn_ie_len ||
788 os_memcmp(ie->rsn_ie, sm->ap_rsn_ie, ie->rsn_ie_len) != 0))) {
789 wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match "
790 "with IE in Beacon/ProbeResp",
791 src_addr, ie->wpa_ie, ie->wpa_ie_len,
792 ie->rsn_ie, ie->rsn_ie_len);
793 return -1;
794 }
795
796 if (sm->proto == WPA_PROTO_WPA &&
797 ie->rsn_ie && sm->ap_rsn_ie == NULL && sm->rsn_enabled) {
798 wpa_report_ie_mismatch(sm, "Possible downgrade attack "
799 "detected - RSN was enabled and RSN IE "
800 "was in msg 3/4, but not in "
801 "Beacon/ProbeResp",
802 src_addr, ie->wpa_ie, ie->wpa_ie_len,
803 ie->rsn_ie, ie->rsn_ie_len);
804 return -1;
805 }
806
807 #ifdef CONFIG_IEEE80211R
808 if (wpa_key_mgmt_ft(sm->key_mgmt)) {
809 struct rsn_mdie *mdie;
810 /* TODO: verify that full MDIE matches with the one from scan
811 * results, not only mobility domain */
812 mdie = (struct rsn_mdie *) (ie->mdie + 2);
813 if (ie->mdie == NULL || ie->mdie_len < 2 + sizeof(*mdie) ||
814 os_memcmp(mdie->mobility_domain, sm->mobility_domain,
815 MOBILITY_DOMAIN_ID_LEN) != 0) {
816 wpa_printf(MSG_DEBUG, "FT: MDIE in msg 3/4 did not "
817 "match with the current mobility domain");
818 return -1;
819 }
820 }
821 #endif /* CONFIG_IEEE80211R */
822
823 return 0;
824 }
825
826
827 /**
828 * wpa_supplicant_send_4_of_4 - Send message 4 of WPA/RSN 4-Way Handshake
829 * @sm: Pointer to WPA state machine data from wpa_sm_init()
830 * @dst: Destination address for the frame
831 * @key: Pointer to the EAPOL-Key frame header
832 * @ver: Version bits from EAPOL-Key Key Info
833 * @key_info: Key Info
834 * @kde: KDEs to include the EAPOL-Key frame
835 * @kde_len: Length of KDEs
836 * @ptk: PTK to use for keyed hash and encryption
837 * Returns: 0 on success, -1 on failure
838 */
839 int wpa_supplicant_send_4_of_4(struct wpa_sm *sm, const unsigned char *dst,
840 const struct wpa_eapol_key *key,
841 u16 ver, u16 key_info,
842 const u8 *kde, size_t kde_len,
843 struct wpa_ptk *ptk)
844 {
845 size_t rlen;
846 struct wpa_eapol_key *reply;
847 u8 *rbuf;
848
849 if (kde)
850 wpa_hexdump(MSG_DEBUG, "WPA: KDE for msg 4/4", kde, kde_len);
851
852 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL,
853 sizeof(*reply) + kde_len,
854 &rlen, (void *) &reply);
855 if (rbuf == NULL)
856 return -1;
857
858 reply->type = sm->proto == WPA_PROTO_RSN ?
859 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
860 key_info &= WPA_KEY_INFO_SECURE;
861 key_info |= ver | WPA_KEY_INFO_KEY_TYPE | WPA_KEY_INFO_MIC;
862 WPA_PUT_BE16(reply->key_info, key_info);
863 if (sm->proto == WPA_PROTO_RSN)
864 WPA_PUT_BE16(reply->key_length, 0);
865 else
866 os_memcpy(reply->key_length, key->key_length, 2);
867 os_memcpy(reply->replay_counter, key->replay_counter,
868 WPA_REPLAY_COUNTER_LEN);
869
870 WPA_PUT_BE16(reply->key_data_length, kde_len);
871 if (kde)
872 os_memcpy(reply + 1, kde, kde_len);
873
874 wpa_printf(MSG_DEBUG, "WPA: Sending EAPOL-Key 4/4");
875 wpa_eapol_key_send(sm, ptk->kck, ver, dst, ETH_P_EAPOL,
876 rbuf, rlen, reply->key_mic);
877
878 return 0;
879 }
880
881
882 static void wpa_supplicant_process_3_of_4(struct wpa_sm *sm,
883 const struct wpa_eapol_key *key,
884 u16 ver)
885 {
886 u16 key_info, keylen, len;
887 const u8 *pos;
888 struct wpa_eapol_ie_parse ie;
889
890 wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE);
891 wpa_printf(MSG_DEBUG, "WPA: RX message 3 of 4-Way Handshake from "
892 MACSTR " (ver=%d)", MAC2STR(sm->bssid), ver);
893
894 key_info = WPA_GET_BE16(key->key_info);
895
896 pos = (const u8 *) (key + 1);
897 len = WPA_GET_BE16(key->key_data_length);
898 wpa_hexdump(MSG_DEBUG, "WPA: IE KeyData", pos, len);
899 wpa_supplicant_parse_ies(pos, len, &ie);
900 if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
901 wpa_printf(MSG_WARNING, "WPA: GTK IE in unencrypted key data");
902 goto failed;
903 }
904 #ifdef CONFIG_IEEE80211W
905 if (ie.igtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
906 wpa_printf(MSG_WARNING, "WPA: IGTK KDE in unencrypted key "
907 "data");
908 goto failed;
909 }
910
911 if (ie.igtk && ie.igtk_len != sizeof(struct wpa_igtk_kde)) {
912 wpa_printf(MSG_WARNING, "WPA: Invalid IGTK KDE length %lu",
913 (unsigned long) ie.igtk_len);
914 goto failed;
915 }
916 #endif /* CONFIG_IEEE80211W */
917
918 if (wpa_supplicant_validate_ie(sm, sm->bssid, &ie) < 0)
919 goto failed;
920
921 if (os_memcmp(sm->anonce, key->key_nonce, WPA_NONCE_LEN) != 0) {
922 wpa_printf(MSG_WARNING, "WPA: ANonce from message 1 of 4-Way "
923 "Handshake differs from 3 of 4-Way Handshake - drop"
924 " packet (src=" MACSTR ")", MAC2STR(sm->bssid));
925 goto failed;
926 }
927
928 keylen = WPA_GET_BE16(key->key_length);
929 switch (sm->pairwise_cipher) {
930 case WPA_CIPHER_CCMP:
931 if (keylen != 16) {
932 wpa_printf(MSG_WARNING, "WPA: Invalid CCMP key length "
933 "%d (src=" MACSTR ")",
934 keylen, MAC2STR(sm->bssid));
935 goto failed;
936 }
937 break;
938 case WPA_CIPHER_TKIP:
939 if (keylen != 32) {
940 wpa_printf(MSG_WARNING, "WPA: Invalid TKIP key length "
941 "%d (src=" MACSTR ")",
942 keylen, MAC2STR(sm->bssid));
943 goto failed;
944 }
945 break;
946 }
947
948 if (wpa_supplicant_send_4_of_4(sm, sm->bssid, key, ver, key_info,
949 NULL, 0, &sm->ptk)) {
950 goto failed;
951 }
952
953 /* SNonce was successfully used in msg 3/4, so mark it to be renewed
954 * for the next 4-Way Handshake. If msg 3 is received again, the old
955 * SNonce will still be used to avoid changing PTK. */
956 sm->renew_snonce = 1;
957
958 if (key_info & WPA_KEY_INFO_INSTALL) {
959 if (wpa_supplicant_install_ptk(sm, key))
960 goto failed;
961 }
962
963 if (key_info & WPA_KEY_INFO_SECURE) {
964 wpa_sm_mlme_setprotection(
965 sm, sm->bssid, MLME_SETPROTECTION_PROTECT_TYPE_RX,
966 MLME_SETPROTECTION_KEY_TYPE_PAIRWISE);
967 eapol_sm_notify_portValid(sm->eapol, TRUE);
968 }
969 wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE);
970
971 if (ie.gtk &&
972 wpa_supplicant_pairwise_gtk(sm, key,
973 ie.gtk, ie.gtk_len, key_info) < 0) {
974 wpa_printf(MSG_INFO, "RSN: Failed to configure GTK");
975 goto failed;
976 }
977
978 if (ieee80211w_set_keys(sm, &ie) < 0) {
979 wpa_printf(MSG_INFO, "RSN: Failed to configure IGTK");
980 goto failed;
981 }
982
983 return;
984
985 failed:
986 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED);
987 }
988
989
990 static int wpa_supplicant_process_1_of_2_rsn(struct wpa_sm *sm,
991 const u8 *keydata,
992 size_t keydatalen,
993 u16 key_info,
994 struct wpa_gtk_data *gd)
995 {
996 int maxkeylen;
997 struct wpa_eapol_ie_parse ie;
998
999 wpa_hexdump(MSG_DEBUG, "RSN: msg 1/2 key data", keydata, keydatalen);
1000 wpa_supplicant_parse_ies(keydata, keydatalen, &ie);
1001 if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
1002 wpa_printf(MSG_WARNING, "WPA: GTK IE in unencrypted key data");
1003 return -1;
1004 }
1005 if (ie.gtk == NULL) {
1006 wpa_printf(MSG_INFO, "WPA: No GTK IE in Group Key msg 1/2");
1007 return -1;
1008 }
1009 maxkeylen = gd->gtk_len = ie.gtk_len - 2;
1010
1011 if (wpa_supplicant_check_group_cipher(sm->group_cipher,
1012 gd->gtk_len, maxkeylen,
1013 &gd->key_rsc_len, &gd->alg))
1014 return -1;
1015
1016 wpa_hexdump(MSG_DEBUG, "RSN: received GTK in group key handshake",
1017 ie.gtk, ie.gtk_len);
1018 gd->keyidx = ie.gtk[0] & 0x3;
1019 gd->tx = wpa_supplicant_gtk_tx_bit_workaround(sm,
1020 !!(ie.gtk[0] & BIT(2)));
1021 if (ie.gtk_len - 2 > sizeof(gd->gtk)) {
1022 wpa_printf(MSG_INFO, "RSN: Too long GTK in GTK IE "
1023 "(len=%lu)", (unsigned long) ie.gtk_len - 2);
1024 return -1;
1025 }
1026 os_memcpy(gd->gtk, ie.gtk + 2, ie.gtk_len - 2);
1027
1028 if (ieee80211w_set_keys(sm, &ie) < 0)
1029 wpa_printf(MSG_INFO, "RSN: Failed to configure IGTK");
1030
1031 return 0;
1032 }
1033
1034
1035 static int wpa_supplicant_process_1_of_2_wpa(struct wpa_sm *sm,
1036 const struct wpa_eapol_key *key,
1037 size_t keydatalen, int key_info,
1038 size_t extra_len, u16 ver,
1039 struct wpa_gtk_data *gd)
1040 {
1041 size_t maxkeylen;
1042 u8 ek[32];
1043
1044 gd->gtk_len = WPA_GET_BE16(key->key_length);
1045 maxkeylen = keydatalen;
1046 if (keydatalen > extra_len) {
1047 wpa_printf(MSG_INFO, "WPA: Truncated EAPOL-Key packet:"
1048 " key_data_length=%lu > extra_len=%lu",
1049 (unsigned long) keydatalen,
1050 (unsigned long) extra_len);
1051 return -1;
1052 }
1053 if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
1054 if (maxkeylen < 8) {
1055 wpa_printf(MSG_INFO, "WPA: Too short maxkeylen (%lu)",
1056 (unsigned long) maxkeylen);
1057 return -1;
1058 }
1059 maxkeylen -= 8;
1060 }
1061
1062 if (wpa_supplicant_check_group_cipher(sm->group_cipher,
1063 gd->gtk_len, maxkeylen,
1064 &gd->key_rsc_len, &gd->alg))
1065 return -1;
1066
1067 gd->keyidx = (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >>
1068 WPA_KEY_INFO_KEY_INDEX_SHIFT;
1069 if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4) {
1070 os_memcpy(ek, key->key_iv, 16);
1071 os_memcpy(ek + 16, sm->ptk.kek, 16);
1072 if (keydatalen > sizeof(gd->gtk)) {
1073 wpa_printf(MSG_WARNING, "WPA: RC4 key data "
1074 "too long (%lu)",
1075 (unsigned long) keydatalen);
1076 return -1;
1077 }
1078 os_memcpy(gd->gtk, key + 1, keydatalen);
1079 if (rc4_skip(ek, 32, 256, gd->gtk, keydatalen)) {
1080 wpa_printf(MSG_ERROR, "WPA: RC4 failed");
1081 return -1;
1082 }
1083 } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
1084 if (keydatalen % 8) {
1085 wpa_printf(MSG_WARNING, "WPA: Unsupported AES-WRAP "
1086 "len %lu", (unsigned long) keydatalen);
1087 return -1;
1088 }
1089 if (maxkeylen > sizeof(gd->gtk)) {
1090 wpa_printf(MSG_WARNING, "WPA: AES-WRAP key data "
1091 "too long (keydatalen=%lu maxkeylen=%lu)",
1092 (unsigned long) keydatalen,
1093 (unsigned long) maxkeylen);
1094 return -1;
1095 }
1096 if (aes_unwrap(sm->ptk.kek, maxkeylen / 8,
1097 (const u8 *) (key + 1), gd->gtk)) {
1098 wpa_printf(MSG_WARNING, "WPA: AES unwrap "
1099 "failed - could not decrypt GTK");
1100 return -1;
1101 }
1102 } else {
1103 wpa_printf(MSG_WARNING, "WPA: Unsupported key_info type %d",
1104 ver);
1105 return -1;
1106 }
1107 gd->tx = wpa_supplicant_gtk_tx_bit_workaround(
1108 sm, !!(key_info & WPA_KEY_INFO_TXRX));
1109 return 0;
1110 }
1111
1112
1113 static int wpa_supplicant_send_2_of_2(struct wpa_sm *sm,
1114 const struct wpa_eapol_key *key,
1115 int ver, u16 key_info)
1116 {
1117 size_t rlen;
1118 struct wpa_eapol_key *reply;
1119 u8 *rbuf;
1120
1121 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL,
1122 sizeof(*reply), &rlen, (void *) &reply);
1123 if (rbuf == NULL)
1124 return -1;
1125
1126 reply->type = sm->proto == WPA_PROTO_RSN ?
1127 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
1128 key_info &= WPA_KEY_INFO_KEY_INDEX_MASK;
1129 key_info |= ver | WPA_KEY_INFO_MIC | WPA_KEY_INFO_SECURE;
1130 WPA_PUT_BE16(reply->key_info, key_info);
1131 if (sm->proto == WPA_PROTO_RSN)
1132 WPA_PUT_BE16(reply->key_length, 0);
1133 else
1134 os_memcpy(reply->key_length, key->key_length, 2);
1135 os_memcpy(reply->replay_counter, key->replay_counter,
1136 WPA_REPLAY_COUNTER_LEN);
1137
1138 WPA_PUT_BE16(reply->key_data_length, 0);
1139
1140 wpa_printf(MSG_DEBUG, "WPA: Sending EAPOL-Key 2/2");
1141 wpa_eapol_key_send(sm, sm->ptk.kck, ver, sm->bssid, ETH_P_EAPOL,
1142 rbuf, rlen, reply->key_mic);
1143
1144 return 0;
1145 }
1146
1147
1148 static void wpa_supplicant_process_1_of_2(struct wpa_sm *sm,
1149 const unsigned char *src_addr,
1150 const struct wpa_eapol_key *key,
1151 int extra_len, u16 ver)
1152 {
1153 u16 key_info, keydatalen;
1154 int rekey, ret;
1155 struct wpa_gtk_data gd;
1156
1157 os_memset(&gd, 0, sizeof(gd));
1158
1159 rekey = wpa_sm_get_state(sm) == WPA_COMPLETED;
1160 wpa_printf(MSG_DEBUG, "WPA: RX message 1 of Group Key Handshake from "
1161 MACSTR " (ver=%d)", MAC2STR(src_addr), ver);
1162
1163 key_info = WPA_GET_BE16(key->key_info);
1164 keydatalen = WPA_GET_BE16(key->key_data_length);
1165
1166 if (sm->proto == WPA_PROTO_RSN) {
1167 ret = wpa_supplicant_process_1_of_2_rsn(sm,
1168 (const u8 *) (key + 1),
1169 keydatalen, key_info,
1170 &gd);
1171 } else {
1172 ret = wpa_supplicant_process_1_of_2_wpa(sm, key, keydatalen,
1173 key_info, extra_len,
1174 ver, &gd);
1175 }
1176
1177 wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE);
1178
1179 if (ret)
1180 goto failed;
1181
1182 if (wpa_supplicant_install_gtk(sm, &gd, key->key_rsc) ||
1183 wpa_supplicant_send_2_of_2(sm, key, ver, key_info))
1184 goto failed;
1185
1186 if (rekey) {
1187 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Group rekeying "
1188 "completed with " MACSTR " [GTK=%s]",
1189 MAC2STR(sm->bssid), wpa_cipher_txt(sm->group_cipher));
1190 wpa_sm_cancel_auth_timeout(sm);
1191 wpa_sm_set_state(sm, WPA_COMPLETED);
1192 } else {
1193 wpa_supplicant_key_neg_complete(sm, sm->bssid,
1194 key_info &
1195 WPA_KEY_INFO_SECURE);
1196 }
1197 return;
1198
1199 failed:
1200 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED);
1201 }
1202
1203
1204 static int wpa_supplicant_verify_eapol_key_mic(struct wpa_sm *sm,
1205 struct wpa_eapol_key *key,
1206 u16 ver,
1207 const u8 *buf, size_t len)
1208 {
1209 u8 mic[16];
1210 int ok = 0;
1211
1212 os_memcpy(mic, key->key_mic, 16);
1213 if (sm->tptk_set) {
1214 os_memset(key->key_mic, 0, 16);
1215 wpa_eapol_key_mic(sm->tptk.kck, ver, buf, len,
1216 key->key_mic);
1217 if (os_memcmp(mic, key->key_mic, 16) != 0) {
1218 wpa_printf(MSG_WARNING, "WPA: Invalid EAPOL-Key MIC "
1219 "when using TPTK - ignoring TPTK");
1220 } else {
1221 ok = 1;
1222 sm->tptk_set = 0;
1223 sm->ptk_set = 1;
1224 os_memcpy(&sm->ptk, &sm->tptk, sizeof(sm->ptk));
1225 }
1226 }
1227
1228 if (!ok && sm->ptk_set) {
1229 os_memset(key->key_mic, 0, 16);
1230 wpa_eapol_key_mic(sm->ptk.kck, ver, buf, len,
1231 key->key_mic);
1232 if (os_memcmp(mic, key->key_mic, 16) != 0) {
1233 wpa_printf(MSG_WARNING, "WPA: Invalid EAPOL-Key MIC "
1234 "- dropping packet");
1235 return -1;
1236 }
1237 ok = 1;
1238 }
1239
1240 if (!ok) {
1241 wpa_printf(MSG_WARNING, "WPA: Could not verify EAPOL-Key MIC "
1242 "- dropping packet");
1243 return -1;
1244 }
1245
1246 os_memcpy(sm->rx_replay_counter, key->replay_counter,
1247 WPA_REPLAY_COUNTER_LEN);
1248 sm->rx_replay_counter_set = 1;
1249 return 0;
1250 }
1251
1252
1253 /* Decrypt RSN EAPOL-Key key data (RC4 or AES-WRAP) */
1254 static int wpa_supplicant_decrypt_key_data(struct wpa_sm *sm,
1255 struct wpa_eapol_key *key, u16 ver)
1256 {
1257 u16 keydatalen = WPA_GET_BE16(key->key_data_length);
1258
1259 wpa_hexdump(MSG_DEBUG, "RSN: encrypted key data",
1260 (u8 *) (key + 1), keydatalen);
1261 if (!sm->ptk_set) {
1262 wpa_printf(MSG_WARNING, "WPA: PTK not available, "
1263 "cannot decrypt EAPOL-Key key data.");
1264 return -1;
1265 }
1266
1267 /* Decrypt key data here so that this operation does not need
1268 * to be implemented separately for each message type. */
1269 if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4) {
1270 u8 ek[32];
1271 os_memcpy(ek, key->key_iv, 16);
1272 os_memcpy(ek + 16, sm->ptk.kek, 16);
1273 if (rc4_skip(ek, 32, 256, (u8 *) (key + 1), keydatalen)) {
1274 wpa_printf(MSG_ERROR, "WPA: RC4 failed");
1275 return -1;
1276 }
1277 } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
1278 ver == WPA_KEY_INFO_TYPE_AES_128_CMAC) {
1279 u8 *buf;
1280 if (keydatalen % 8) {
1281 wpa_printf(MSG_WARNING, "WPA: Unsupported "
1282 "AES-WRAP len %d", keydatalen);
1283 return -1;
1284 }
1285 keydatalen -= 8; /* AES-WRAP adds 8 bytes */
1286 buf = os_malloc(keydatalen);
1287 if (buf == NULL) {
1288 wpa_printf(MSG_WARNING, "WPA: No memory for "
1289 "AES-UNWRAP buffer");
1290 return -1;
1291 }
1292 if (aes_unwrap(sm->ptk.kek, keydatalen / 8,
1293 (u8 *) (key + 1), buf)) {
1294 os_free(buf);
1295 wpa_printf(MSG_WARNING, "WPA: AES unwrap failed - "
1296 "could not decrypt EAPOL-Key key data");
1297 return -1;
1298 }
1299 os_memcpy(key + 1, buf, keydatalen);
1300 os_free(buf);
1301 WPA_PUT_BE16(key->key_data_length, keydatalen);
1302 } else {
1303 wpa_printf(MSG_WARNING, "WPA: Unsupported key_info type %d",
1304 ver);
1305 return -1;
1306 }
1307 wpa_hexdump_key(MSG_DEBUG, "WPA: decrypted EAPOL-Key key data",
1308 (u8 *) (key + 1), keydatalen);
1309 return 0;
1310 }
1311
1312
1313 /**
1314 * wpa_sm_aborted_cached - Notify WPA that PMKSA caching was aborted
1315 * @sm: Pointer to WPA state machine data from wpa_sm_init()
1316 */
1317 void wpa_sm_aborted_cached(struct wpa_sm *sm)
1318 {
1319 if (sm && sm->cur_pmksa) {
1320 wpa_printf(MSG_DEBUG, "RSN: Cancelling PMKSA caching attempt");
1321 sm->cur_pmksa = NULL;
1322 }
1323 }
1324
1325
1326 static void wpa_eapol_key_dump(const struct wpa_eapol_key *key)
1327 {
1328 #ifndef CONFIG_NO_STDOUT_DEBUG
1329 u16 key_info = WPA_GET_BE16(key->key_info);
1330
1331 wpa_printf(MSG_DEBUG, " EAPOL-Key type=%d", key->type);
1332 wpa_printf(MSG_DEBUG, " key_info 0x%x (ver=%d keyidx=%d rsvd=%d %s"
1333 "%s%s%s%s%s%s%s)",
1334 key_info, key_info & WPA_KEY_INFO_TYPE_MASK,
1335 (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >>
1336 WPA_KEY_INFO_KEY_INDEX_SHIFT,
1337 (key_info & (BIT(13) | BIT(14) | BIT(15))) >> 13,
1338 key_info & WPA_KEY_INFO_KEY_TYPE ? "Pairwise" : "Group",
1339 key_info & WPA_KEY_INFO_INSTALL ? " Install" : "",
1340 key_info & WPA_KEY_INFO_ACK ? " Ack" : "",
1341 key_info & WPA_KEY_INFO_MIC ? " MIC" : "",
1342 key_info & WPA_KEY_INFO_SECURE ? " Secure" : "",
1343 key_info & WPA_KEY_INFO_ERROR ? " Error" : "",
1344 key_info & WPA_KEY_INFO_REQUEST ? " Request" : "",
1345 key_info & WPA_KEY_INFO_ENCR_KEY_DATA ? " Encr" : "");
1346 wpa_printf(MSG_DEBUG, " key_length=%u key_data_length=%u",
1347 WPA_GET_BE16(key->key_length),
1348 WPA_GET_BE16(key->key_data_length));
1349 wpa_hexdump(MSG_DEBUG, " replay_counter",
1350 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
1351 wpa_hexdump(MSG_DEBUG, " key_nonce", key->key_nonce, WPA_NONCE_LEN);
1352 wpa_hexdump(MSG_DEBUG, " key_iv", key->key_iv, 16);
1353 wpa_hexdump(MSG_DEBUG, " key_rsc", key->key_rsc, 8);
1354 wpa_hexdump(MSG_DEBUG, " key_id (reserved)", key->key_id, 8);
1355 wpa_hexdump(MSG_DEBUG, " key_mic", key->key_mic, 16);
1356 #endif /* CONFIG_NO_STDOUT_DEBUG */
1357 }
1358
1359
1360 /**
1361 * wpa_sm_rx_eapol - Process received WPA EAPOL frames
1362 * @sm: Pointer to WPA state machine data from wpa_sm_init()
1363 * @src_addr: Source MAC address of the EAPOL packet
1364 * @buf: Pointer to the beginning of the EAPOL data (EAPOL header)
1365 * @len: Length of the EAPOL frame
1366 * Returns: 1 = WPA EAPOL-Key processed, 0 = not a WPA EAPOL-Key, -1 failure
1367 *
1368 * This function is called for each received EAPOL frame. Other than EAPOL-Key
1369 * frames can be skipped if filtering is done elsewhere. wpa_sm_rx_eapol() is
1370 * only processing WPA and WPA2 EAPOL-Key frames.
1371 *
1372 * The received EAPOL-Key packets are validated and valid packets are replied
1373 * to. In addition, key material (PTK, GTK) is configured at the end of a
1374 * successful key handshake.
1375 */
1376 int wpa_sm_rx_eapol(struct wpa_sm *sm, const u8 *src_addr,
1377 const u8 *buf, size_t len)
1378 {
1379 size_t plen, data_len, extra_len;
1380 struct ieee802_1x_hdr *hdr;
1381 struct wpa_eapol_key *key;
1382 u16 key_info, ver;
1383 u8 *tmp;
1384 int ret = -1;
1385 struct wpa_peerkey *peerkey = NULL;
1386
1387 #ifdef CONFIG_IEEE80211R
1388 sm->ft_completed = 0;
1389 #endif /* CONFIG_IEEE80211R */
1390
1391 if (len < sizeof(*hdr) + sizeof(*key)) {
1392 wpa_printf(MSG_DEBUG, "WPA: EAPOL frame too short to be a WPA "
1393 "EAPOL-Key (len %lu, expecting at least %lu)",
1394 (unsigned long) len,
1395 (unsigned long) sizeof(*hdr) + sizeof(*key));
1396 return 0;
1397 }
1398
1399 tmp = os_malloc(len);
1400 if (tmp == NULL)
1401 return -1;
1402 os_memcpy(tmp, buf, len);
1403
1404 hdr = (struct ieee802_1x_hdr *) tmp;
1405 key = (struct wpa_eapol_key *) (hdr + 1);
1406 plen = be_to_host16(hdr->length);
1407 data_len = plen + sizeof(*hdr);
1408 wpa_printf(MSG_DEBUG, "IEEE 802.1X RX: version=%d type=%d length=%lu",
1409 hdr->version, hdr->type, (unsigned long) plen);
1410
1411 if (hdr->version < EAPOL_VERSION) {
1412 /* TODO: backwards compatibility */
1413 }
1414 if (hdr->type != IEEE802_1X_TYPE_EAPOL_KEY) {
1415 wpa_printf(MSG_DEBUG, "WPA: EAPOL frame (type %u) discarded, "
1416 "not a Key frame", hdr->type);
1417 ret = 0;
1418 goto out;
1419 }
1420 if (plen > len - sizeof(*hdr) || plen < sizeof(*key)) {
1421 wpa_printf(MSG_DEBUG, "WPA: EAPOL frame payload size %lu "
1422 "invalid (frame size %lu)",
1423 (unsigned long) plen, (unsigned long) len);
1424 ret = 0;
1425 goto out;
1426 }
1427
1428 if (key->type != EAPOL_KEY_TYPE_WPA && key->type != EAPOL_KEY_TYPE_RSN)
1429 {
1430 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key type (%d) unknown, "
1431 "discarded", key->type);
1432 ret = 0;
1433 goto out;
1434 }
1435 wpa_eapol_key_dump(key);
1436
1437 eapol_sm_notify_lower_layer_success(sm->eapol, 0);
1438 wpa_hexdump(MSG_MSGDUMP, "WPA: RX EAPOL-Key", tmp, len);
1439 if (data_len < len) {
1440 wpa_printf(MSG_DEBUG, "WPA: ignoring %lu bytes after the IEEE "
1441 "802.1X data", (unsigned long) len - data_len);
1442 }
1443 key_info = WPA_GET_BE16(key->key_info);
1444 ver = key_info & WPA_KEY_INFO_TYPE_MASK;
1445 if (ver != WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 &&
1446 #if defined(CONFIG_IEEE80211R) || defined(CONFIG_IEEE80211W)
1447 ver != WPA_KEY_INFO_TYPE_AES_128_CMAC &&
1448 #endif /* CONFIG_IEEE80211R || CONFIG_IEEE80211W */
1449 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
1450 wpa_printf(MSG_INFO, "WPA: Unsupported EAPOL-Key descriptor "
1451 "version %d.", ver);
1452 goto out;
1453 }
1454
1455 #ifdef CONFIG_IEEE80211R
1456 if (wpa_key_mgmt_ft(sm->key_mgmt)) {
1457 /* IEEE 802.11r uses a new key_info type (AES-128-CMAC). */
1458 if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) {
1459 wpa_printf(MSG_INFO, "FT: AP did not use "
1460 "AES-128-CMAC.");
1461 goto out;
1462 }
1463 } else
1464 #endif /* CONFIG_IEEE80211R */
1465 #ifdef CONFIG_IEEE80211W
1466 if (wpa_key_mgmt_sha256(sm->key_mgmt)) {
1467 if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) {
1468 wpa_printf(MSG_INFO, "WPA: AP did not use the "
1469 "negotiated AES-128-CMAC.");
1470 goto out;
1471 }
1472 } else
1473 #endif /* CONFIG_IEEE80211W */
1474 if (sm->pairwise_cipher == WPA_CIPHER_CCMP &&
1475 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
1476 wpa_printf(MSG_INFO, "WPA: CCMP is used, but EAPOL-Key "
1477 "descriptor version (%d) is not 2.", ver);
1478 if (sm->group_cipher != WPA_CIPHER_CCMP &&
1479 !(key_info & WPA_KEY_INFO_KEY_TYPE)) {
1480 /* Earlier versions of IEEE 802.11i did not explicitly
1481 * require version 2 descriptor for all EAPOL-Key
1482 * packets, so allow group keys to use version 1 if
1483 * CCMP is not used for them. */
1484 wpa_printf(MSG_INFO, "WPA: Backwards compatibility: "
1485 "allow invalid version for non-CCMP group "
1486 "keys");
1487 } else
1488 goto out;
1489 }
1490
1491 #ifdef CONFIG_PEERKEY
1492 for (peerkey = sm->peerkey; peerkey; peerkey = peerkey->next) {
1493 if (os_memcmp(peerkey->addr, src_addr, ETH_ALEN) == 0)
1494 break;
1495 }
1496
1497 if (!(key_info & WPA_KEY_INFO_SMK_MESSAGE) && peerkey) {
1498 if (!peerkey->initiator && peerkey->replay_counter_set &&
1499 os_memcmp(key->replay_counter, peerkey->replay_counter,
1500 WPA_REPLAY_COUNTER_LEN) <= 0) {
1501 wpa_printf(MSG_WARNING, "RSN: EAPOL-Key Replay "
1502 "Counter did not increase (STK) - dropping "
1503 "packet");
1504 goto out;
1505 } else if (peerkey->initiator) {
1506 u8 _tmp[WPA_REPLAY_COUNTER_LEN];
1507 os_memcpy(_tmp, key->replay_counter,
1508 WPA_REPLAY_COUNTER_LEN);
1509 inc_byte_array(_tmp, WPA_REPLAY_COUNTER_LEN);
1510 if (os_memcmp(_tmp, peerkey->replay_counter,
1511 WPA_REPLAY_COUNTER_LEN) != 0) {
1512 wpa_printf(MSG_DEBUG, "RSN: EAPOL-Key Replay "
1513 "Counter did not match (STK) - "
1514 "dropping packet");
1515 goto out;
1516 }
1517 }
1518 }
1519
1520 if (peerkey && peerkey->initiator && (key_info & WPA_KEY_INFO_ACK)) {
1521 wpa_printf(MSG_INFO, "RSN: Ack bit in key_info from STK peer");
1522 goto out;
1523 }
1524 #endif /* CONFIG_PEERKEY */
1525
1526 if (!peerkey && sm->rx_replay_counter_set &&
1527 os_memcmp(key->replay_counter, sm->rx_replay_counter,
1528 WPA_REPLAY_COUNTER_LEN) <= 0) {
1529 wpa_printf(MSG_WARNING, "WPA: EAPOL-Key Replay Counter did not"
1530 " increase - dropping packet");
1531 goto out;
1532 }
1533
1534 if (!(key_info & (WPA_KEY_INFO_ACK | WPA_KEY_INFO_SMK_MESSAGE))
1535 #ifdef CONFIG_PEERKEY
1536 && (peerkey == NULL || !peerkey->initiator)
1537 #endif /* CONFIG_PEERKEY */
1538 ) {
1539 wpa_printf(MSG_INFO, "WPA: No Ack bit in key_info");
1540 goto out;
1541 }
1542
1543 if (key_info & WPA_KEY_INFO_REQUEST) {
1544 wpa_printf(MSG_INFO, "WPA: EAPOL-Key with Request bit - "
1545 "dropped");
1546 goto out;
1547 }
1548
1549 if ((key_info & WPA_KEY_INFO_MIC) && !peerkey &&
1550 wpa_supplicant_verify_eapol_key_mic(sm, key, ver, tmp, data_len))
1551 goto out;
1552
1553 #ifdef CONFIG_PEERKEY
1554 if ((key_info & WPA_KEY_INFO_MIC) && peerkey &&
1555 peerkey_verify_eapol_key_mic(sm, peerkey, key, ver, tmp, data_len))
1556 goto out;
1557 #endif /* CONFIG_PEERKEY */
1558
1559 extra_len = data_len - sizeof(*hdr) - sizeof(*key);
1560
1561 if (WPA_GET_BE16(key->key_data_length) > extra_len) {
1562 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Invalid EAPOL-Key "
1563 "frame - key_data overflow (%d > %lu)",
1564 WPA_GET_BE16(key->key_data_length),
1565 (unsigned long) extra_len);
1566 goto out;
1567 }
1568 extra_len = WPA_GET_BE16(key->key_data_length);
1569
1570 if (sm->proto == WPA_PROTO_RSN &&
1571 (key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
1572 if (wpa_supplicant_decrypt_key_data(sm, key, ver))
1573 goto out;
1574 extra_len = WPA_GET_BE16(key->key_data_length);
1575 }
1576
1577 if (key_info & WPA_KEY_INFO_KEY_TYPE) {
1578 if (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) {
1579 wpa_printf(MSG_WARNING, "WPA: Ignored EAPOL-Key "
1580 "(Pairwise) with non-zero key index");
1581 goto out;
1582 }
1583 if (peerkey) {
1584 /* PeerKey 4-Way Handshake */
1585 peerkey_rx_eapol_4way(sm, peerkey, key, key_info, ver);
1586 } else if (key_info & WPA_KEY_INFO_MIC) {
1587 /* 3/4 4-Way Handshake */
1588 wpa_supplicant_process_3_of_4(sm, key, ver);
1589 } else {
1590 /* 1/4 4-Way Handshake */
1591 wpa_supplicant_process_1_of_4(sm, src_addr, key,
1592 ver);
1593 }
1594 } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) {
1595 /* PeerKey SMK Handshake */
1596 peerkey_rx_eapol_smk(sm, src_addr, key, extra_len, key_info,
1597 ver);
1598 } else {
1599 if (key_info & WPA_KEY_INFO_MIC) {
1600 /* 1/2 Group Key Handshake */
1601 wpa_supplicant_process_1_of_2(sm, src_addr, key,
1602 extra_len, ver);
1603 } else {
1604 wpa_printf(MSG_WARNING, "WPA: EAPOL-Key (Group) "
1605 "without Mic bit - dropped");
1606 }
1607 }
1608
1609 ret = 1;
1610
1611 out:
1612 os_free(tmp);
1613 return ret;
1614 }
1615
1616
1617 #ifdef CONFIG_CTRL_IFACE
1618 static int wpa_cipher_bits(int cipher)
1619 {
1620 switch (cipher) {
1621 case WPA_CIPHER_CCMP:
1622 return 128;
1623 case WPA_CIPHER_TKIP:
1624 return 256;
1625 case WPA_CIPHER_WEP104:
1626 return 104;
1627 case WPA_CIPHER_WEP40:
1628 return 40;
1629 default:
1630 return 0;
1631 }
1632 }
1633
1634
1635 static u32 wpa_key_mgmt_suite(struct wpa_sm *sm)
1636 {
1637 switch (sm->key_mgmt) {
1638 case WPA_KEY_MGMT_IEEE8021X:
1639 return (sm->proto == WPA_PROTO_RSN ?
1640 RSN_AUTH_KEY_MGMT_UNSPEC_802_1X :
1641 WPA_AUTH_KEY_MGMT_UNSPEC_802_1X);
1642 case WPA_KEY_MGMT_PSK:
1643 return (sm->proto == WPA_PROTO_RSN ?
1644 RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X :
1645 WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X);
1646 #ifdef CONFIG_IEEE80211R
1647 case WPA_KEY_MGMT_FT_IEEE8021X:
1648 return RSN_AUTH_KEY_MGMT_FT_802_1X;
1649 case WPA_KEY_MGMT_FT_PSK:
1650 return RSN_AUTH_KEY_MGMT_FT_PSK;
1651 #endif /* CONFIG_IEEE80211R */
1652 #ifdef CONFIG_IEEE80211W
1653 case WPA_KEY_MGMT_IEEE8021X_SHA256:
1654 return RSN_AUTH_KEY_MGMT_802_1X_SHA256;
1655 case WPA_KEY_MGMT_PSK_SHA256:
1656 return RSN_AUTH_KEY_MGMT_PSK_SHA256;
1657 #endif /* CONFIG_IEEE80211W */
1658 case WPA_KEY_MGMT_WPA_NONE:
1659 return WPA_AUTH_KEY_MGMT_NONE;
1660 default:
1661 return 0;
1662 }
1663 }
1664
1665
1666 static u32 wpa_cipher_suite(struct wpa_sm *sm, int cipher)
1667 {
1668 switch (cipher) {
1669 case WPA_CIPHER_CCMP:
1670 return (sm->proto == WPA_PROTO_RSN ?
1671 RSN_CIPHER_SUITE_CCMP : WPA_CIPHER_SUITE_CCMP);
1672 case WPA_CIPHER_TKIP:
1673 return (sm->proto == WPA_PROTO_RSN ?
1674 RSN_CIPHER_SUITE_TKIP : WPA_CIPHER_SUITE_TKIP);
1675 case WPA_CIPHER_WEP104:
1676 return (sm->proto == WPA_PROTO_RSN ?
1677 RSN_CIPHER_SUITE_WEP104 : WPA_CIPHER_SUITE_WEP104);
1678 case WPA_CIPHER_WEP40:
1679 return (sm->proto == WPA_PROTO_RSN ?
1680 RSN_CIPHER_SUITE_WEP40 : WPA_CIPHER_SUITE_WEP40);
1681 case WPA_CIPHER_NONE:
1682 return (sm->proto == WPA_PROTO_RSN ?
1683 RSN_CIPHER_SUITE_NONE : WPA_CIPHER_SUITE_NONE);
1684 default:
1685 return 0;
1686 }
1687 }
1688
1689
1690 #define RSN_SUITE "%02x-%02x-%02x-%d"
1691 #define RSN_SUITE_ARG(s) \
1692 ((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff
1693
1694 /**
1695 * wpa_sm_get_mib - Dump text list of MIB entries
1696 * @sm: Pointer to WPA state machine data from wpa_sm_init()
1697 * @buf: Buffer for the list
1698 * @buflen: Length of the buffer
1699 * Returns: Number of bytes written to buffer
1700 *
1701 * This function is used fetch dot11 MIB variables.
1702 */
1703 int wpa_sm_get_mib(struct wpa_sm *sm, char *buf, size_t buflen)
1704 {
1705 char pmkid_txt[PMKID_LEN * 2 + 1];
1706 int rsna, ret;
1707 size_t len;
1708
1709 if (sm->cur_pmksa) {
1710 wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt),
1711 sm->cur_pmksa->pmkid, PMKID_LEN);
1712 } else
1713 pmkid_txt[0] = '\0';
1714
1715 if ((wpa_key_mgmt_wpa_psk(sm->key_mgmt) ||
1716 wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt)) &&
1717 sm->proto == WPA_PROTO_RSN)
1718 rsna = 1;
1719 else
1720 rsna = 0;
1721
1722 ret = os_snprintf(buf, buflen,
1723 "dot11RSNAOptionImplemented=TRUE\n"
1724 "dot11RSNAPreauthenticationImplemented=TRUE\n"
1725 "dot11RSNAEnabled=%s\n"
1726 "dot11RSNAPreauthenticationEnabled=%s\n"
1727 "dot11RSNAConfigVersion=%d\n"
1728 "dot11RSNAConfigPairwiseKeysSupported=5\n"
1729 "dot11RSNAConfigGroupCipherSize=%d\n"
1730 "dot11RSNAConfigPMKLifetime=%d\n"
1731 "dot11RSNAConfigPMKReauthThreshold=%d\n"
1732 "dot11RSNAConfigNumberOfPTKSAReplayCounters=1\n"
1733 "dot11RSNAConfigSATimeout=%d\n",
1734 rsna ? "TRUE" : "FALSE",
1735 rsna ? "TRUE" : "FALSE",
1736 RSN_VERSION,
1737 wpa_cipher_bits(sm->group_cipher),
1738 sm->dot11RSNAConfigPMKLifetime,
1739 sm->dot11RSNAConfigPMKReauthThreshold,
1740 sm->dot11RSNAConfigSATimeout);
1741 if (ret < 0 || (size_t) ret >= buflen)
1742 return 0;
1743 len = ret;
1744
1745 ret = os_snprintf(
1746 buf + len, buflen - len,
1747 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n"
1748 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n"
1749 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n"
1750 "dot11RSNAPMKIDUsed=%s\n"
1751 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n"
1752 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n"
1753 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n"
1754 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n"
1755 "dot11RSNA4WayHandshakeFailures=%u\n",
1756 RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)),
1757 RSN_SUITE_ARG(wpa_cipher_suite(sm, sm->pairwise_cipher)),
1758 RSN_SUITE_ARG(wpa_cipher_suite(sm, sm->group_cipher)),
1759 pmkid_txt,
1760 RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)),
1761 RSN_SUITE_ARG(wpa_cipher_suite(sm, sm->pairwise_cipher)),
1762 RSN_SUITE_ARG(wpa_cipher_suite(sm, sm->group_cipher)),
1763 sm->dot11RSNA4WayHandshakeFailures);
1764 if (ret >= 0 && (size_t) ret < buflen)
1765 len += ret;
1766
1767 return (int) len;
1768 }
1769 #endif /* CONFIG_CTRL_IFACE */
1770
1771
1772 static void wpa_sm_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry,
1773 void *ctx, int replace)
1774 {
1775 struct wpa_sm *sm = ctx;
1776
1777 if (sm->cur_pmksa == entry ||
1778 (sm->pmk_len == entry->pmk_len &&
1779 os_memcmp(sm->pmk, entry->pmk, sm->pmk_len) == 0)) {
1780 wpa_printf(MSG_DEBUG, "RSN: removed current PMKSA entry");
1781 sm->cur_pmksa = NULL;
1782
1783 if (replace) {
1784 /* A new entry is being added, so no need to
1785 * deauthenticate in this case. This happens when EAP
1786 * authentication is completed again (reauth or failed
1787 * PMKSA caching attempt). */
1788 return;
1789 }
1790
1791 os_memset(sm->pmk, 0, sizeof(sm->pmk));
1792 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED);
1793 }
1794 }
1795
1796
1797 /**
1798 * wpa_sm_init - Initialize WPA state machine
1799 * @ctx: Context pointer for callbacks; this needs to be an allocated buffer
1800 * Returns: Pointer to the allocated WPA state machine data
1801 *
1802 * This function is used to allocate a new WPA state machine and the returned
1803 * value is passed to all WPA state machine calls.
1804 */
1805 struct wpa_sm * wpa_sm_init(struct wpa_sm_ctx *ctx)
1806 {
1807 struct wpa_sm *sm;
1808
1809 sm = os_zalloc(sizeof(*sm));
1810 if (sm == NULL)
1811 return NULL;
1812 sm->renew_snonce = 1;
1813 sm->ctx = ctx;
1814
1815 sm->dot11RSNAConfigPMKLifetime = 43200;
1816 sm->dot11RSNAConfigPMKReauthThreshold = 70;
1817 sm->dot11RSNAConfigSATimeout = 60;
1818
1819 sm->pmksa = pmksa_cache_init(wpa_sm_pmksa_free_cb, sm, sm);
1820 if (sm->pmksa == NULL) {
1821 wpa_printf(MSG_ERROR, "RSN: PMKSA cache initialization "
1822 "failed");
1823 os_free(sm);
1824 return NULL;
1825 }
1826
1827 return sm;
1828 }
1829
1830
1831 /**
1832 * wpa_sm_deinit - Deinitialize WPA state machine
1833 * @sm: Pointer to WPA state machine data from wpa_sm_init()
1834 */
1835 void wpa_sm_deinit(struct wpa_sm *sm)
1836 {
1837 if (sm == NULL)
1838 return;
1839 pmksa_cache_deinit(sm->pmksa);
1840 eloop_cancel_timeout(wpa_sm_start_preauth, sm, NULL);
1841 eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL);
1842 os_free(sm->assoc_wpa_ie);
1843 os_free(sm->ap_wpa_ie);
1844 os_free(sm->ap_rsn_ie);
1845 os_free(sm->ctx);
1846 peerkey_deinit(sm);
1847 os_free(sm);
1848 }
1849
1850
1851 /**
1852 * wpa_sm_notify_assoc - Notify WPA state machine about association
1853 * @sm: Pointer to WPA state machine data from wpa_sm_init()
1854 * @bssid: The BSSID of the new association
1855 *
1856 * This function is called to let WPA state machine know that the connection
1857 * was established.
1858 */
1859 void wpa_sm_notify_assoc(struct wpa_sm *sm, const u8 *bssid)
1860 {
1861 int clear_ptk = 1;
1862
1863 if (sm == NULL)
1864 return;
1865
1866 wpa_printf(MSG_DEBUG, "WPA: Association event - clear replay counter");
1867 os_memcpy(sm->bssid, bssid, ETH_ALEN);
1868 os_memset(sm->rx_replay_counter, 0, WPA_REPLAY_COUNTER_LEN);
1869 sm->rx_replay_counter_set = 0;
1870 sm->renew_snonce = 1;
1871 if (os_memcmp(sm->preauth_bssid, bssid, ETH_ALEN) == 0)
1872 rsn_preauth_deinit(sm);
1873
1874 #ifdef CONFIG_IEEE80211R
1875 if (wpa_ft_is_completed(sm)) {
1876 wpa_supplicant_key_neg_complete(sm, sm->bssid, 1);
1877
1878 /* Prepare for the next transition */
1879 wpa_ft_prepare_auth_request(sm);
1880
1881 clear_ptk = 0;
1882 }
1883 #endif /* CONFIG_IEEE80211R */
1884
1885 if (clear_ptk) {
1886 /*
1887 * IEEE 802.11, 8.4.10: Delete PTK SA on (re)association if
1888 * this is not part of a Fast BSS Transition.
1889 */
1890 wpa_printf(MSG_DEBUG, "WPA: Clear old PTK");
1891 sm->ptk_set = 0;
1892 sm->tptk_set = 0;
1893 }
1894 }
1895
1896
1897 /**
1898 * wpa_sm_notify_disassoc - Notify WPA state machine about disassociation
1899 * @sm: Pointer to WPA state machine data from wpa_sm_init()
1900 *
1901 * This function is called to let WPA state machine know that the connection
1902 * was lost. This will abort any existing pre-authentication session.
1903 */
1904 void wpa_sm_notify_disassoc(struct wpa_sm *sm)
1905 {
1906 rsn_preauth_deinit(sm);
1907 if (wpa_sm_get_state(sm) == WPA_4WAY_HANDSHAKE)
1908 sm->dot11RSNA4WayHandshakeFailures++;
1909 }
1910
1911
1912 /**
1913 * wpa_sm_set_pmk - Set PMK
1914 * @sm: Pointer to WPA state machine data from wpa_sm_init()
1915 * @pmk: The new PMK
1916 * @pmk_len: The length of the new PMK in bytes
1917 *
1918 * Configure the PMK for WPA state machine.
1919 */
1920 void wpa_sm_set_pmk(struct wpa_sm *sm, const u8 *pmk, size_t pmk_len)
1921 {
1922 if (sm == NULL)
1923 return;
1924
1925 sm->pmk_len = pmk_len;
1926 os_memcpy(sm->pmk, pmk, pmk_len);
1927
1928 #ifdef CONFIG_IEEE80211R
1929 /* Set XXKey to be PSK for FT key derivation */
1930 sm->xxkey_len = pmk_len;
1931 os_memcpy(sm->xxkey, pmk, pmk_len);
1932 #endif /* CONFIG_IEEE80211R */
1933 }
1934
1935
1936 /**
1937 * wpa_sm_set_pmk_from_pmksa - Set PMK based on the current PMKSA
1938 * @sm: Pointer to WPA state machine data from wpa_sm_init()
1939 *
1940 * Take the PMK from the current PMKSA into use. If no PMKSA is active, the PMK
1941 * will be cleared.
1942 */
1943 void wpa_sm_set_pmk_from_pmksa(struct wpa_sm *sm)
1944 {
1945 if (sm == NULL)
1946 return;
1947
1948 if (sm->cur_pmksa) {
1949 sm->pmk_len = sm->cur_pmksa->pmk_len;
1950 os_memcpy(sm->pmk, sm->cur_pmksa->pmk, sm->pmk_len);
1951 } else {
1952 sm->pmk_len = PMK_LEN;
1953 os_memset(sm->pmk, 0, PMK_LEN);
1954 }
1955 }
1956
1957
1958 /**
1959 * wpa_sm_set_fast_reauth - Set fast reauthentication (EAP) enabled/disabled
1960 * @sm: Pointer to WPA state machine data from wpa_sm_init()
1961 * @fast_reauth: Whether fast reauthentication (EAP) is allowed
1962 */
1963 void wpa_sm_set_fast_reauth(struct wpa_sm *sm, int fast_reauth)
1964 {
1965 if (sm)
1966 sm->fast_reauth = fast_reauth;
1967 }
1968
1969
1970 /**
1971 * wpa_sm_set_scard_ctx - Set context pointer for smartcard callbacks
1972 * @sm: Pointer to WPA state machine data from wpa_sm_init()
1973 * @scard_ctx: Context pointer for smartcard related callback functions
1974 */
1975 void wpa_sm_set_scard_ctx(struct wpa_sm *sm, void *scard_ctx)
1976 {
1977 if (sm == NULL)
1978 return;
1979 sm->scard_ctx = scard_ctx;
1980 if (sm->preauth_eapol)
1981 eapol_sm_register_scard_ctx(sm->preauth_eapol, scard_ctx);
1982 }
1983
1984
1985 /**
1986 * wpa_sm_set_config - Notification of current configration change
1987 * @sm: Pointer to WPA state machine data from wpa_sm_init()
1988 * @config: Pointer to current network configuration
1989 *
1990 * Notify WPA state machine that configuration has changed. config will be
1991 * stored as a backpointer to network configuration. This can be %NULL to clear
1992 * the stored pointed.
1993 */
1994 void wpa_sm_set_config(struct wpa_sm *sm, struct rsn_supp_config *config)
1995 {
1996 if (!sm)
1997 return;
1998
1999 if (config) {
2000 sm->network_ctx = config->network_ctx;
2001 sm->peerkey_enabled = config->peerkey_enabled;
2002 sm->allowed_pairwise_cipher = config->allowed_pairwise_cipher;
2003 sm->proactive_key_caching = config->proactive_key_caching;
2004 sm->eap_workaround = config->eap_workaround;
2005 sm->eap_conf_ctx = config->eap_conf_ctx;
2006 if (config->ssid) {
2007 os_memcpy(sm->ssid, config->ssid, config->ssid_len);
2008 sm->ssid_len = config->ssid_len;
2009 } else
2010 sm->ssid_len = 0;
2011 sm->wpa_ptk_rekey = config->wpa_ptk_rekey;
2012 } else {
2013 sm->network_ctx = NULL;
2014 sm->peerkey_enabled = 0;
2015 sm->allowed_pairwise_cipher = 0;
2016 sm->proactive_key_caching = 0;
2017 sm->eap_workaround = 0;
2018 sm->eap_conf_ctx = NULL;
2019 sm->ssid_len = 0;
2020 sm->wpa_ptk_rekey = 0;
2021 }
2022 if (config == NULL || config->network_ctx != sm->network_ctx)
2023 pmksa_cache_notify_reconfig(sm->pmksa);
2024 }
2025
2026
2027 /**
2028 * wpa_sm_set_own_addr - Set own MAC address
2029 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2030 * @addr: Own MAC address
2031 */
2032 void wpa_sm_set_own_addr(struct wpa_sm *sm, const u8 *addr)
2033 {
2034 if (sm)
2035 os_memcpy(sm->own_addr, addr, ETH_ALEN);
2036 }
2037
2038
2039 /**
2040 * wpa_sm_set_ifname - Set network interface name
2041 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2042 * @ifname: Interface name
2043 * @bridge_ifname: Optional bridge interface name (for pre-auth)
2044 */
2045 void wpa_sm_set_ifname(struct wpa_sm *sm, const char *ifname,
2046 const char *bridge_ifname)
2047 {
2048 if (sm) {
2049 sm->ifname = ifname;
2050 sm->bridge_ifname = bridge_ifname;
2051 }
2052 }
2053
2054
2055 /**
2056 * wpa_sm_set_eapol - Set EAPOL state machine pointer
2057 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2058 * @eapol: Pointer to EAPOL state machine allocated with eapol_sm_init()
2059 */
2060 void wpa_sm_set_eapol(struct wpa_sm *sm, struct eapol_sm *eapol)
2061 {
2062 if (sm)
2063 sm->eapol = eapol;
2064 }
2065
2066
2067 /**
2068 * wpa_sm_set_param - Set WPA state machine parameters
2069 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2070 * @param: Parameter field
2071 * @value: Parameter value
2072 * Returns: 0 on success, -1 on failure
2073 */
2074 int wpa_sm_set_param(struct wpa_sm *sm, enum wpa_sm_conf_params param,
2075 unsigned int value)
2076 {
2077 int ret = 0;
2078
2079 if (sm == NULL)
2080 return -1;
2081
2082 switch (param) {
2083 case RSNA_PMK_LIFETIME:
2084 if (value > 0)
2085 sm->dot11RSNAConfigPMKLifetime = value;
2086 else
2087 ret = -1;
2088 break;
2089 case RSNA_PMK_REAUTH_THRESHOLD:
2090 if (value > 0 && value <= 100)
2091 sm->dot11RSNAConfigPMKReauthThreshold = value;
2092 else
2093 ret = -1;
2094 break;
2095 case RSNA_SA_TIMEOUT:
2096 if (value > 0)
2097 sm->dot11RSNAConfigSATimeout = value;
2098 else
2099 ret = -1;
2100 break;
2101 case WPA_PARAM_PROTO:
2102 sm->proto = value;
2103 break;
2104 case WPA_PARAM_PAIRWISE:
2105 sm->pairwise_cipher = value;
2106 break;
2107 case WPA_PARAM_GROUP:
2108 sm->group_cipher = value;
2109 break;
2110 case WPA_PARAM_KEY_MGMT:
2111 sm->key_mgmt = value;
2112 break;
2113 #ifdef CONFIG_IEEE80211W
2114 case WPA_PARAM_MGMT_GROUP:
2115 sm->mgmt_group_cipher = value;
2116 break;
2117 #endif /* CONFIG_IEEE80211W */
2118 case WPA_PARAM_RSN_ENABLED:
2119 sm->rsn_enabled = value;
2120 break;
2121 default:
2122 break;
2123 }
2124
2125 return ret;
2126 }
2127
2128
2129 /**
2130 * wpa_sm_get_param - Get WPA state machine parameters
2131 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2132 * @param: Parameter field
2133 * Returns: Parameter value
2134 */
2135 unsigned int wpa_sm_get_param(struct wpa_sm *sm, enum wpa_sm_conf_params param)
2136 {
2137 if (sm == NULL)
2138 return 0;
2139
2140 switch (param) {
2141 case RSNA_PMK_LIFETIME:
2142 return sm->dot11RSNAConfigPMKLifetime;
2143 case RSNA_PMK_REAUTH_THRESHOLD:
2144 return sm->dot11RSNAConfigPMKReauthThreshold;
2145 case RSNA_SA_TIMEOUT:
2146 return sm->dot11RSNAConfigSATimeout;
2147 case WPA_PARAM_PROTO:
2148 return sm->proto;
2149 case WPA_PARAM_PAIRWISE:
2150 return sm->pairwise_cipher;
2151 case WPA_PARAM_GROUP:
2152 return sm->group_cipher;
2153 case WPA_PARAM_KEY_MGMT:
2154 return sm->key_mgmt;
2155 #ifdef CONFIG_IEEE80211W
2156 case WPA_PARAM_MGMT_GROUP:
2157 return sm->mgmt_group_cipher;
2158 #endif /* CONFIG_IEEE80211W */
2159 case WPA_PARAM_RSN_ENABLED:
2160 return sm->rsn_enabled;
2161 default:
2162 return 0;
2163 }
2164 }
2165
2166
2167 /**
2168 * wpa_sm_get_status - Get WPA state machine
2169 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2170 * @buf: Buffer for status information
2171 * @buflen: Maximum buffer length
2172 * @verbose: Whether to include verbose status information
2173 * Returns: Number of bytes written to buf.
2174 *
2175 * Query WPA state machine for status information. This function fills in
2176 * a text area with current status information. If the buffer (buf) is not
2177 * large enough, status information will be truncated to fit the buffer.
2178 */
2179 int wpa_sm_get_status(struct wpa_sm *sm, char *buf, size_t buflen,
2180 int verbose)
2181 {
2182 char *pos = buf, *end = buf + buflen;
2183 int ret;
2184
2185 ret = os_snprintf(pos, end - pos,
2186 "pairwise_cipher=%s\n"
2187 "group_cipher=%s\n"
2188 "key_mgmt=%s\n",
2189 wpa_cipher_txt(sm->pairwise_cipher),
2190 wpa_cipher_txt(sm->group_cipher),
2191 wpa_key_mgmt_txt(sm->key_mgmt, sm->proto));
2192 if (ret < 0 || ret >= end - pos)
2193 return pos - buf;
2194 pos += ret;
2195 return pos - buf;
2196 }
2197
2198
2199 /**
2200 * wpa_sm_set_assoc_wpa_ie_default - Generate own WPA/RSN IE from configuration
2201 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2202 * @wpa_ie: Pointer to buffer for WPA/RSN IE
2203 * @wpa_ie_len: Pointer to the length of the wpa_ie buffer
2204 * Returns: 0 on success, -1 on failure
2205 */
2206 int wpa_sm_set_assoc_wpa_ie_default(struct wpa_sm *sm, u8 *wpa_ie,
2207 size_t *wpa_ie_len)
2208 {
2209 int res;
2210
2211 if (sm == NULL)
2212 return -1;
2213
2214 res = wpa_gen_wpa_ie(sm, wpa_ie, *wpa_ie_len);
2215 if (res < 0)
2216 return -1;
2217 *wpa_ie_len = res;
2218
2219 wpa_hexdump(MSG_DEBUG, "WPA: Set own WPA IE default",
2220 wpa_ie, *wpa_ie_len);
2221
2222 if (sm->assoc_wpa_ie == NULL) {
2223 /*
2224 * Make a copy of the WPA/RSN IE so that 4-Way Handshake gets
2225 * the correct version of the IE even if PMKSA caching is
2226 * aborted (which would remove PMKID from IE generation).
2227 */
2228 sm->assoc_wpa_ie = os_malloc(*wpa_ie_len);
2229 if (sm->assoc_wpa_ie == NULL)
2230 return -1;
2231
2232 os_memcpy(sm->assoc_wpa_ie, wpa_ie, *wpa_ie_len);
2233 sm->assoc_wpa_ie_len = *wpa_ie_len;
2234 }
2235
2236 return 0;
2237 }
2238
2239
2240 /**
2241 * wpa_sm_set_assoc_wpa_ie - Set own WPA/RSN IE from (Re)AssocReq
2242 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2243 * @ie: Pointer to IE data (starting from id)
2244 * @len: IE length
2245 * Returns: 0 on success, -1 on failure
2246 *
2247 * Inform WPA state machine about the WPA/RSN IE used in (Re)Association
2248 * Request frame. The IE will be used to override the default value generated
2249 * with wpa_sm_set_assoc_wpa_ie_default().
2250 */
2251 int wpa_sm_set_assoc_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len)
2252 {
2253 if (sm == NULL)
2254 return -1;
2255
2256 os_free(sm->assoc_wpa_ie);
2257 if (ie == NULL || len == 0) {
2258 wpa_printf(MSG_DEBUG, "WPA: clearing own WPA/RSN IE");
2259 sm->assoc_wpa_ie = NULL;
2260 sm->assoc_wpa_ie_len = 0;
2261 } else {
2262 wpa_hexdump(MSG_DEBUG, "WPA: set own WPA/RSN IE", ie, len);
2263 sm->assoc_wpa_ie = os_malloc(len);
2264 if (sm->assoc_wpa_ie == NULL)
2265 return -1;
2266
2267 os_memcpy(sm->assoc_wpa_ie, ie, len);
2268 sm->assoc_wpa_ie_len = len;
2269 }
2270
2271 return 0;
2272 }
2273
2274
2275 /**
2276 * wpa_sm_set_ap_wpa_ie - Set AP WPA IE from Beacon/ProbeResp
2277 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2278 * @ie: Pointer to IE data (starting from id)
2279 * @len: IE length
2280 * Returns: 0 on success, -1 on failure
2281 *
2282 * Inform WPA state machine about the WPA IE used in Beacon / Probe Response
2283 * frame.
2284 */
2285 int wpa_sm_set_ap_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len)
2286 {
2287 if (sm == NULL)
2288 return -1;
2289
2290 os_free(sm->ap_wpa_ie);
2291 if (ie == NULL || len == 0) {
2292 wpa_printf(MSG_DEBUG, "WPA: clearing AP WPA IE");
2293 sm->ap_wpa_ie = NULL;
2294 sm->ap_wpa_ie_len = 0;
2295 } else {
2296 wpa_hexdump(MSG_DEBUG, "WPA: set AP WPA IE", ie, len);
2297 sm->ap_wpa_ie = os_malloc(len);
2298 if (sm->ap_wpa_ie == NULL)
2299 return -1;
2300
2301 os_memcpy(sm->ap_wpa_ie, ie, len);
2302 sm->ap_wpa_ie_len = len;
2303 }
2304
2305 return 0;
2306 }
2307
2308
2309 /**
2310 * wpa_sm_set_ap_rsn_ie - Set AP RSN IE from Beacon/ProbeResp
2311 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2312 * @ie: Pointer to IE data (starting from id)
2313 * @len: IE length
2314 * Returns: 0 on success, -1 on failure
2315 *
2316 * Inform WPA state machine about the RSN IE used in Beacon / Probe Response
2317 * frame.
2318 */
2319 int wpa_sm_set_ap_rsn_ie(struct wpa_sm *sm, const u8 *ie, size_t len)
2320 {
2321 if (sm == NULL)
2322 return -1;
2323
2324 os_free(sm->ap_rsn_ie);
2325 if (ie == NULL || len == 0) {
2326 wpa_printf(MSG_DEBUG, "WPA: clearing AP RSN IE");
2327 sm->ap_rsn_ie = NULL;
2328 sm->ap_rsn_ie_len = 0;
2329 } else {
2330 wpa_hexdump(MSG_DEBUG, "WPA: set AP RSN IE", ie, len);
2331 sm->ap_rsn_ie = os_malloc(len);
2332 if (sm->ap_rsn_ie == NULL)
2333 return -1;
2334
2335 os_memcpy(sm->ap_rsn_ie, ie, len);
2336 sm->ap_rsn_ie_len = len;
2337 }
2338
2339 return 0;
2340 }
2341
2342
2343 /**
2344 * wpa_sm_parse_own_wpa_ie - Parse own WPA/RSN IE
2345 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2346 * @data: Pointer to data area for parsing results
2347 * Returns: 0 on success, -1 if IE is not known, or -2 on parsing failure
2348 *
2349 * Parse the contents of the own WPA or RSN IE from (Re)AssocReq and write the
2350 * parsed data into data.
2351 */
2352 int wpa_sm_parse_own_wpa_ie(struct wpa_sm *sm, struct wpa_ie_data *data)
2353 {
2354 if (sm == NULL || sm->assoc_wpa_ie == NULL) {
2355 wpa_printf(MSG_DEBUG, "WPA: No WPA/RSN IE available from "
2356 "association info");
2357 return -1;
2358 }
2359 if (wpa_parse_wpa_ie(sm->assoc_wpa_ie, sm->assoc_wpa_ie_len, data))
2360 return -2;
2361 return 0;
2362 }
2363
2364
2365 int wpa_sm_pmksa_cache_list(struct wpa_sm *sm, char *buf, size_t len)
2366 {
2367 #ifndef CONFIG_NO_WPA2
2368 return pmksa_cache_list(sm->pmksa, buf, len);
2369 #else /* CONFIG_NO_WPA2 */
2370 return -1;
2371 #endif /* CONFIG_NO_WPA2 */
2372 }