1 /*
2 * WPA Supplicant - WPA state machine and EAPOL-Key processing
3 * Copyright (c) 2003-2010, 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 "crypto/random.h"
21 #include "common/ieee802_11_defs.h"
22 #include "eapol_supp/eapol_supp_sm.h"
23 #include "wpa.h"
24 #include "eloop.h"
25 #include "preauth.h"
26 #include "pmksa_cache.h"
27 #include "wpa_i.h"
28 #include "wpa_ie.h"
29 #include "peerkey.h"
30
31
32 /**
33 * wpa_eapol_key_send - Send WPA/RSN EAPOL-Key message
34 * @sm: Pointer to WPA state machine data from wpa_sm_init()
35 * @kck: Key Confirmation Key (KCK, part of PTK)
36 * @ver: Version field from Key Info
37 * @dest: Destination address for the frame
38 * @proto: Ethertype (usually ETH_P_EAPOL)
39 * @msg: EAPOL-Key message
40 * @msg_len: Length of message
41 * @key_mic: Pointer to the buffer to which the EAPOL-Key MIC is written
42 */
wpa_eapol_key_send(struct wpa_sm * sm,const u8 * kck,int ver,const u8 * dest,u16 proto,u8 * msg,size_t msg_len,u8 * key_mic)43 void wpa_eapol_key_send(struct wpa_sm *sm, const u8 *kck,
44 int ver, const u8 *dest, u16 proto,
45 u8 *msg, size_t msg_len, u8 *key_mic)
46 {
47 if (is_zero_ether_addr(dest) && is_zero_ether_addr(sm->bssid)) {
48 /*
49 * Association event was not yet received; try to fetch
50 * BSSID from the driver.
51 */
52 if (wpa_sm_get_bssid(sm, sm->bssid) < 0) {
53 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
54 "WPA: Failed to read BSSID for "
55 "EAPOL-Key destination address");
56 } else {
57 dest = sm->bssid;
58 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
59 "WPA: Use BSSID (" MACSTR
60 ") as the destination for EAPOL-Key",
61 MAC2STR(dest));
62 }
63 }
64 if (key_mic &&
65 wpa_eapol_key_mic(kck, ver, msg, msg_len, key_mic)) {
66 wpa_msg(sm->ctx->msg_ctx, MSG_ERROR,
67 "WPA: Failed to generate EAPOL-Key "
68 "version %d MIC", ver);
69 goto out;
70 }
71 wpa_hexdump_key(MSG_DEBUG, "WPA: KCK", kck, 16);
72 wpa_hexdump(MSG_DEBUG, "WPA: Derived Key MIC", key_mic, 16);
73 wpa_hexdump(MSG_MSGDUMP, "WPA: TX EAPOL-Key", msg, msg_len);
74 wpa_sm_ether_send(sm, dest, proto, msg, msg_len);
75 eapol_sm_notify_tx_eapol_key(sm->eapol);
76 out:
77 os_free(msg);
78 }
79
80
81 /**
82 * wpa_sm_key_request - Send EAPOL-Key Request
83 * @sm: Pointer to WPA state machine data from wpa_sm_init()
84 * @error: Indicate whether this is an Michael MIC error report
85 * @pairwise: 1 = error report for pairwise packet, 0 = for group packet
86 *
87 * Send an EAPOL-Key Request to the current authenticator. This function is
88 * used to request rekeying and it is usually called when a local Michael MIC
89 * failure is detected.
90 */
wpa_sm_key_request(struct wpa_sm * sm,int error,int pairwise)91 void wpa_sm_key_request(struct wpa_sm *sm, int error, int pairwise)
92 {
93 size_t rlen;
94 struct wpa_eapol_key *reply;
95 int key_info, ver;
96 u8 bssid[ETH_ALEN], *rbuf;
97
98 if (wpa_key_mgmt_ft(sm->key_mgmt) || wpa_key_mgmt_sha256(sm->key_mgmt))
99 ver = WPA_KEY_INFO_TYPE_AES_128_CMAC;
100 else if (sm->pairwise_cipher == WPA_CIPHER_CCMP)
101 ver = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES;
102 else
103 ver = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4;
104
105 if (wpa_sm_get_bssid(sm, bssid) < 0) {
106 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
107 "Failed to read BSSID for EAPOL-Key request");
108 return;
109 }
110
111 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL,
112 sizeof(*reply), &rlen, (void *) &reply);
113 if (rbuf == NULL)
114 return;
115
116 reply->type = sm->proto == WPA_PROTO_RSN ?
117 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
118 key_info = WPA_KEY_INFO_REQUEST | ver;
119 if (sm->ptk_set)
120 key_info |= WPA_KEY_INFO_MIC;
121 if (error)
122 key_info |= WPA_KEY_INFO_ERROR;
123 if (pairwise)
124 key_info |= WPA_KEY_INFO_KEY_TYPE;
125 WPA_PUT_BE16(reply->key_info, key_info);
126 WPA_PUT_BE16(reply->key_length, 0);
127 os_memcpy(reply->replay_counter, sm->request_counter,
128 WPA_REPLAY_COUNTER_LEN);
129 inc_byte_array(sm->request_counter, WPA_REPLAY_COUNTER_LEN);
130
131 WPA_PUT_BE16(reply->key_data_length, 0);
132
133 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
134 "WPA: Sending EAPOL-Key Request (error=%d "
135 "pairwise=%d ptk_set=%d len=%lu)",
136 error, pairwise, sm->ptk_set, (unsigned long) rlen);
137 wpa_eapol_key_send(sm, sm->ptk.kck, ver, bssid, ETH_P_EAPOL,
138 rbuf, rlen, key_info & WPA_KEY_INFO_MIC ?
139 reply->key_mic : NULL);
140 }
141
142
wpa_supplicant_get_pmk(struct wpa_sm * sm,const unsigned char * src_addr,const u8 * pmkid)143 static int wpa_supplicant_get_pmk(struct wpa_sm *sm,
144 const unsigned char *src_addr,
145 const u8 *pmkid)
146 {
147 int abort_cached = 0;
148
149 if (pmkid && !sm->cur_pmksa) {
150 /* When using drivers that generate RSN IE, wpa_supplicant may
151 * not have enough time to get the association information
152 * event before receiving this 1/4 message, so try to find a
153 * matching PMKSA cache entry here. */
154 sm->cur_pmksa = pmksa_cache_get(sm->pmksa, src_addr, pmkid);
155 if (sm->cur_pmksa) {
156 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
157 "RSN: found matching PMKID from PMKSA cache");
158 } else {
159 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
160 "RSN: no matching PMKID found");
161 abort_cached = 1;
162 }
163 }
164
165 if (pmkid && sm->cur_pmksa &&
166 os_memcmp(pmkid, sm->cur_pmksa->pmkid, PMKID_LEN) == 0) {
167 wpa_hexdump(MSG_DEBUG, "RSN: matched PMKID", pmkid, PMKID_LEN);
168 wpa_sm_set_pmk_from_pmksa(sm);
169 wpa_hexdump_key(MSG_DEBUG, "RSN: PMK from PMKSA cache",
170 sm->pmk, sm->pmk_len);
171 eapol_sm_notify_cached(sm->eapol);
172 #ifdef CONFIG_IEEE80211R
173 sm->xxkey_len = 0;
174 #endif /* CONFIG_IEEE80211R */
175 } else if (wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt) && sm->eapol) {
176 int res, pmk_len;
177 pmk_len = PMK_LEN;
178 res = eapol_sm_get_key(sm->eapol, sm->pmk, PMK_LEN);
179 if (res) {
180 /*
181 * EAP-LEAP is an exception from other EAP methods: it
182 * uses only 16-byte PMK.
183 */
184 res = eapol_sm_get_key(sm->eapol, sm->pmk, 16);
185 pmk_len = 16;
186 } else {
187 #ifdef CONFIG_IEEE80211R
188 u8 buf[2 * PMK_LEN];
189 if (eapol_sm_get_key(sm->eapol, buf, 2 * PMK_LEN) == 0)
190 {
191 os_memcpy(sm->xxkey, buf + PMK_LEN, PMK_LEN);
192 sm->xxkey_len = PMK_LEN;
193 os_memset(buf, 0, sizeof(buf));
194 }
195 #endif /* CONFIG_IEEE80211R */
196 }
197 if (res == 0) {
198 wpa_hexdump_key(MSG_DEBUG, "WPA: PMK from EAPOL state "
199 "machines", sm->pmk, pmk_len);
200 sm->pmk_len = pmk_len;
201 if (sm->proto == WPA_PROTO_RSN &&
202 !wpa_key_mgmt_ft(sm->key_mgmt)) {
203 pmksa_cache_add(sm->pmksa, sm->pmk, pmk_len,
204 src_addr, sm->own_addr,
205 sm->network_ctx, sm->key_mgmt);
206 }
207 if (!sm->cur_pmksa && pmkid &&
208 pmksa_cache_get(sm->pmksa, src_addr, pmkid)) {
209 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
210 "RSN: the new PMK matches with the "
211 "PMKID");
212 abort_cached = 0;
213 }
214 } else {
215 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
216 "WPA: Failed to get master session key from "
217 "EAPOL state machines - key handshake "
218 "aborted");
219 if (sm->cur_pmksa) {
220 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
221 "RSN: Cancelled PMKSA caching "
222 "attempt");
223 sm->cur_pmksa = NULL;
224 abort_cached = 1;
225 } else if (!abort_cached) {
226 return -1;
227 }
228 }
229 }
230
231 if (abort_cached && wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt) &&
232 !wpa_key_mgmt_ft(sm->key_mgmt)) {
233 /* Send EAPOL-Start to trigger full EAP authentication. */
234 u8 *buf;
235 size_t buflen;
236
237 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
238 "RSN: no PMKSA entry found - trigger "
239 "full EAP authentication");
240 buf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_START,
241 NULL, 0, &buflen, NULL);
242 if (buf) {
243 wpa_sm_ether_send(sm, sm->bssid, ETH_P_EAPOL,
244 buf, buflen);
245 os_free(buf);
246 return -2;
247 }
248
249 return -1;
250 }
251
252 return 0;
253 }
254
255
256 /**
257 * wpa_supplicant_send_2_of_4 - Send message 2 of WPA/RSN 4-Way Handshake
258 * @sm: Pointer to WPA state machine data from wpa_sm_init()
259 * @dst: Destination address for the frame
260 * @key: Pointer to the EAPOL-Key frame header
261 * @ver: Version bits from EAPOL-Key Key Info
262 * @nonce: Nonce value for the EAPOL-Key frame
263 * @wpa_ie: WPA/RSN IE
264 * @wpa_ie_len: Length of the WPA/RSN IE
265 * @ptk: PTK to use for keyed hash and encryption
266 * Returns: 0 on success, -1 on failure
267 */
wpa_supplicant_send_2_of_4(struct wpa_sm * sm,const unsigned char * dst,const struct wpa_eapol_key * key,int ver,const u8 * nonce,const u8 * wpa_ie,size_t wpa_ie_len,struct wpa_ptk * ptk)268 int wpa_supplicant_send_2_of_4(struct wpa_sm *sm, const unsigned char *dst,
269 const struct wpa_eapol_key *key,
270 int ver, const u8 *nonce,
271 const u8 *wpa_ie, size_t wpa_ie_len,
272 struct wpa_ptk *ptk)
273 {
274 size_t rlen;
275 struct wpa_eapol_key *reply;
276 u8 *rbuf;
277 u8 *rsn_ie_buf = NULL;
278
279 if (wpa_ie == NULL) {
280 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: No wpa_ie set - "
281 "cannot generate msg 2/4");
282 return -1;
283 }
284
285 #ifdef CONFIG_IEEE80211R
286 if (wpa_key_mgmt_ft(sm->key_mgmt)) {
287 int res;
288
289 /*
290 * Add PMKR1Name into RSN IE (PMKID-List) and add MDIE and
291 * FTIE from (Re)Association Response.
292 */
293 rsn_ie_buf = os_malloc(wpa_ie_len + 2 + 2 + PMKID_LEN +
294 sm->assoc_resp_ies_len);
295 if (rsn_ie_buf == NULL)
296 return -1;
297 os_memcpy(rsn_ie_buf, wpa_ie, wpa_ie_len);
298 res = wpa_insert_pmkid(rsn_ie_buf, wpa_ie_len,
299 sm->pmk_r1_name);
300 if (res < 0) {
301 os_free(rsn_ie_buf);
302 return -1;
303 }
304 wpa_ie_len += res;
305
306 if (sm->assoc_resp_ies) {
307 os_memcpy(rsn_ie_buf + wpa_ie_len, sm->assoc_resp_ies,
308 sm->assoc_resp_ies_len);
309 wpa_ie_len += sm->assoc_resp_ies_len;
310 }
311
312 wpa_ie = rsn_ie_buf;
313 }
314 #endif /* CONFIG_IEEE80211R */
315
316 wpa_hexdump(MSG_DEBUG, "WPA: WPA IE for msg 2/4", wpa_ie, wpa_ie_len);
317
318 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY,
319 NULL, sizeof(*reply) + wpa_ie_len,
320 &rlen, (void *) &reply);
321 if (rbuf == NULL) {
322 os_free(rsn_ie_buf);
323 return -1;
324 }
325
326 reply->type = sm->proto == WPA_PROTO_RSN ?
327 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
328 WPA_PUT_BE16(reply->key_info,
329 ver | WPA_KEY_INFO_KEY_TYPE | WPA_KEY_INFO_MIC);
330 if (sm->proto == WPA_PROTO_RSN)
331 WPA_PUT_BE16(reply->key_length, 0);
332 else
333 os_memcpy(reply->key_length, key->key_length, 2);
334 os_memcpy(reply->replay_counter, key->replay_counter,
335 WPA_REPLAY_COUNTER_LEN);
336 wpa_hexdump(MSG_DEBUG, "WPA: Replay Counter", reply->replay_counter,
337 WPA_REPLAY_COUNTER_LEN);
338
339 WPA_PUT_BE16(reply->key_data_length, wpa_ie_len);
340 os_memcpy(reply + 1, wpa_ie, wpa_ie_len);
341 os_free(rsn_ie_buf);
342
343 os_memcpy(reply->key_nonce, nonce, WPA_NONCE_LEN);
344
345 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 2/4");
346 wpa_eapol_key_send(sm, ptk->kck, ver, dst, ETH_P_EAPOL,
347 rbuf, rlen, reply->key_mic);
348
349 return 0;
350 }
351
352
wpa_derive_ptk(struct wpa_sm * sm,const unsigned char * src_addr,const struct wpa_eapol_key * key,struct wpa_ptk * ptk)353 static int wpa_derive_ptk(struct wpa_sm *sm, const unsigned char *src_addr,
354 const struct wpa_eapol_key *key,
355 struct wpa_ptk *ptk)
356 {
357 size_t ptk_len = sm->pairwise_cipher == WPA_CIPHER_CCMP ? 48 : 64;
358 #ifdef CONFIG_IEEE80211R
359 if (wpa_key_mgmt_ft(sm->key_mgmt))
360 return wpa_derive_ptk_ft(sm, src_addr, key, ptk, ptk_len);
361 #endif /* CONFIG_IEEE80211R */
362
363 wpa_pmk_to_ptk(sm->pmk, sm->pmk_len, "Pairwise key expansion",
364 sm->own_addr, sm->bssid, sm->snonce, key->key_nonce,
365 (u8 *) ptk, ptk_len,
366 wpa_key_mgmt_sha256(sm->key_mgmt));
367 return 0;
368 }
369
370
wpa_supplicant_process_1_of_4(struct wpa_sm * sm,const unsigned char * src_addr,const struct wpa_eapol_key * key,u16 ver)371 static void wpa_supplicant_process_1_of_4(struct wpa_sm *sm,
372 const unsigned char *src_addr,
373 const struct wpa_eapol_key *key,
374 u16 ver)
375 {
376 struct wpa_eapol_ie_parse ie;
377 struct wpa_ptk *ptk;
378 u8 buf[8];
379 int res;
380
381 if (wpa_sm_get_network_ctx(sm) == NULL) {
382 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: No SSID info "
383 "found (msg 1 of 4)");
384 return;
385 }
386
387 wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE);
388 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 1 of 4-Way "
389 "Handshake from " MACSTR " (ver=%d)", MAC2STR(src_addr), ver);
390
391 os_memset(&ie, 0, sizeof(ie));
392
393 #ifndef CONFIG_NO_WPA2
394 if (sm->proto == WPA_PROTO_RSN) {
395 /* RSN: msg 1/4 should contain PMKID for the selected PMK */
396 const u8 *_buf = (const u8 *) (key + 1);
397 size_t len = WPA_GET_BE16(key->key_data_length);
398 wpa_hexdump(MSG_DEBUG, "RSN: msg 1/4 key data", _buf, len);
399 wpa_supplicant_parse_ies(_buf, len, &ie);
400 if (ie.pmkid) {
401 wpa_hexdump(MSG_DEBUG, "RSN: PMKID from "
402 "Authenticator", ie.pmkid, PMKID_LEN);
403 }
404 }
405 #endif /* CONFIG_NO_WPA2 */
406
407 res = wpa_supplicant_get_pmk(sm, src_addr, ie.pmkid);
408 if (res == -2) {
409 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "RSN: Do not reply to "
410 "msg 1/4 - requesting full EAP authentication");
411 return;
412 }
413 if (res)
414 goto failed;
415
416 if (sm->renew_snonce) {
417 if (random_get_bytes(sm->snonce, WPA_NONCE_LEN)) {
418 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
419 "WPA: Failed to get random data for SNonce");
420 goto failed;
421 }
422 sm->renew_snonce = 0;
423 wpa_hexdump(MSG_DEBUG, "WPA: Renewed SNonce",
424 sm->snonce, WPA_NONCE_LEN);
425 }
426
427 /* Calculate PTK which will be stored as a temporary PTK until it has
428 * been verified when processing message 3/4. */
429 ptk = &sm->tptk;
430 wpa_derive_ptk(sm, src_addr, key, ptk);
431 /* Supplicant: swap tx/rx Mic keys */
432 os_memcpy(buf, ptk->u.auth.tx_mic_key, 8);
433 os_memcpy(ptk->u.auth.tx_mic_key, ptk->u.auth.rx_mic_key, 8);
434 os_memcpy(ptk->u.auth.rx_mic_key, buf, 8);
435 sm->tptk_set = 1;
436
437 if (wpa_supplicant_send_2_of_4(sm, sm->bssid, key, ver, sm->snonce,
438 sm->assoc_wpa_ie, sm->assoc_wpa_ie_len,
439 ptk))
440 goto failed;
441
442 os_memcpy(sm->anonce, key->key_nonce, WPA_NONCE_LEN);
443 return;
444
445 failed:
446 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED);
447 }
448
449
wpa_sm_start_preauth(void * eloop_ctx,void * timeout_ctx)450 static void wpa_sm_start_preauth(void *eloop_ctx, void *timeout_ctx)
451 {
452 struct wpa_sm *sm = eloop_ctx;
453 rsn_preauth_candidate_process(sm);
454 }
455
456
wpa_supplicant_key_neg_complete(struct wpa_sm * sm,const u8 * addr,int secure)457 static void wpa_supplicant_key_neg_complete(struct wpa_sm *sm,
458 const u8 *addr, int secure)
459 {
460 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
461 "WPA: Key negotiation completed with "
462 MACSTR " [PTK=%s GTK=%s]", MAC2STR(addr),
463 wpa_cipher_txt(sm->pairwise_cipher),
464 wpa_cipher_txt(sm->group_cipher));
465 wpa_sm_cancel_auth_timeout(sm);
466 wpa_sm_set_state(sm, WPA_COMPLETED);
467
468 if (secure) {
469 wpa_sm_mlme_setprotection(
470 sm, addr, MLME_SETPROTECTION_PROTECT_TYPE_RX_TX,
471 MLME_SETPROTECTION_KEY_TYPE_PAIRWISE);
472 eapol_sm_notify_portValid(sm->eapol, TRUE);
473 if (wpa_key_mgmt_wpa_psk(sm->key_mgmt))
474 eapol_sm_notify_eap_success(sm->eapol, TRUE);
475 /*
476 * Start preauthentication after a short wait to avoid a
477 * possible race condition between the data receive and key
478 * configuration after the 4-Way Handshake. This increases the
479 * likelyhood of the first preauth EAPOL-Start frame getting to
480 * the target AP.
481 */
482 eloop_register_timeout(1, 0, wpa_sm_start_preauth, sm, NULL);
483 }
484
485 if (sm->cur_pmksa && sm->cur_pmksa->opportunistic) {
486 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
487 "RSN: Authenticator accepted "
488 "opportunistic PMKSA entry - marking it valid");
489 sm->cur_pmksa->opportunistic = 0;
490 }
491
492 #ifdef CONFIG_IEEE80211R
493 if (wpa_key_mgmt_ft(sm->key_mgmt)) {
494 /* Prepare for the next transition */
495 wpa_ft_prepare_auth_request(sm, NULL);
496 }
497 #endif /* CONFIG_IEEE80211R */
498 }
499
500
wpa_sm_rekey_ptk(void * eloop_ctx,void * timeout_ctx)501 static void wpa_sm_rekey_ptk(void *eloop_ctx, void *timeout_ctx)
502 {
503 struct wpa_sm *sm = eloop_ctx;
504 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Request PTK rekeying");
505 wpa_sm_key_request(sm, 0, 1);
506 }
507
508
wpa_supplicant_install_ptk(struct wpa_sm * sm,const struct wpa_eapol_key * key)509 static int wpa_supplicant_install_ptk(struct wpa_sm *sm,
510 const struct wpa_eapol_key *key)
511 {
512 int keylen, rsclen;
513 enum wpa_alg alg;
514 const u8 *key_rsc;
515 u8 null_rsc[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
516
517 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
518 "WPA: Installing PTK to the driver");
519
520 switch (sm->pairwise_cipher) {
521 case WPA_CIPHER_CCMP:
522 alg = WPA_ALG_CCMP;
523 keylen = 16;
524 rsclen = 6;
525 break;
526 case WPA_CIPHER_TKIP:
527 alg = WPA_ALG_TKIP;
528 keylen = 32;
529 rsclen = 6;
530 break;
531 case WPA_CIPHER_NONE:
532 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Pairwise Cipher "
533 "Suite: NONE - do not use pairwise keys");
534 return 0;
535 default:
536 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
537 "WPA: Unsupported pairwise cipher %d",
538 sm->pairwise_cipher);
539 return -1;
540 }
541
542 if (sm->proto == WPA_PROTO_RSN) {
543 key_rsc = null_rsc;
544 } else {
545 key_rsc = key->key_rsc;
546 wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, rsclen);
547 }
548
549 if (wpa_sm_set_key(sm, alg, sm->bssid, 0, 1, key_rsc, rsclen,
550 (u8 *) sm->ptk.tk1, keylen) < 0) {
551 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
552 "WPA: Failed to set PTK to the "
553 "driver (alg=%d keylen=%d bssid=" MACSTR ")",
554 alg, keylen, MAC2STR(sm->bssid));
555 return -1;
556 }
557
558 if (sm->wpa_ptk_rekey) {
559 eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL);
560 eloop_register_timeout(sm->wpa_ptk_rekey, 0, wpa_sm_rekey_ptk,
561 sm, NULL);
562 }
563
564 return 0;
565 }
566
567
wpa_supplicant_check_group_cipher(struct wpa_sm * sm,int group_cipher,int keylen,int maxkeylen,int * key_rsc_len,enum wpa_alg * alg)568 static int wpa_supplicant_check_group_cipher(struct wpa_sm *sm,
569 int group_cipher,
570 int keylen, int maxkeylen,
571 int *key_rsc_len,
572 enum wpa_alg *alg)
573 {
574 int ret = 0;
575
576 switch (group_cipher) {
577 case WPA_CIPHER_CCMP:
578 if (keylen != 16 || maxkeylen < 16) {
579 ret = -1;
580 break;
581 }
582 *key_rsc_len = 6;
583 *alg = WPA_ALG_CCMP;
584 break;
585 case WPA_CIPHER_TKIP:
586 if (keylen != 32 || maxkeylen < 32) {
587 ret = -1;
588 break;
589 }
590 *key_rsc_len = 6;
591 *alg = WPA_ALG_TKIP;
592 break;
593 case WPA_CIPHER_WEP104:
594 if (keylen != 13 || maxkeylen < 13) {
595 ret = -1;
596 break;
597 }
598 *key_rsc_len = 0;
599 *alg = WPA_ALG_WEP;
600 break;
601 case WPA_CIPHER_WEP40:
602 if (keylen != 5 || maxkeylen < 5) {
603 ret = -1;
604 break;
605 }
606 *key_rsc_len = 0;
607 *alg = WPA_ALG_WEP;
608 break;
609 default:
610 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
611 "WPA: Unsupported Group Cipher %d",
612 group_cipher);
613 return -1;
614 }
615
616 if (ret < 0 ) {
617 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
618 "WPA: Unsupported %s Group Cipher key length %d (%d)",
619 wpa_cipher_txt(group_cipher), keylen, maxkeylen);
620 }
621
622 return ret;
623 }
624
625
626 struct wpa_gtk_data {
627 enum wpa_alg alg;
628 int tx, key_rsc_len, keyidx;
629 u8 gtk[32];
630 int gtk_len;
631 };
632
633
wpa_supplicant_install_gtk(struct wpa_sm * sm,const struct wpa_gtk_data * gd,const u8 * key_rsc)634 static int wpa_supplicant_install_gtk(struct wpa_sm *sm,
635 const struct wpa_gtk_data *gd,
636 const u8 *key_rsc)
637 {
638 const u8 *_gtk = gd->gtk;
639 u8 gtk_buf[32];
640
641 wpa_hexdump_key(MSG_DEBUG, "WPA: Group Key", gd->gtk, gd->gtk_len);
642 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
643 "WPA: Installing GTK to the driver (keyidx=%d tx=%d len=%d)",
644 gd->keyidx, gd->tx, gd->gtk_len);
645 wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, gd->key_rsc_len);
646 if (sm->group_cipher == WPA_CIPHER_TKIP) {
647 /* Swap Tx/Rx keys for Michael MIC */
648 os_memcpy(gtk_buf, gd->gtk, 16);
649 os_memcpy(gtk_buf + 16, gd->gtk + 24, 8);
650 os_memcpy(gtk_buf + 24, gd->gtk + 16, 8);
651 _gtk = gtk_buf;
652 }
653 if (sm->pairwise_cipher == WPA_CIPHER_NONE) {
654 if (wpa_sm_set_key(sm, gd->alg, NULL,
655 gd->keyidx, 1, key_rsc, gd->key_rsc_len,
656 _gtk, gd->gtk_len) < 0) {
657 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
658 "WPA: Failed to set GTK to the driver "
659 "(Group only)");
660 return -1;
661 }
662 } else if (wpa_sm_set_key(sm, gd->alg, broadcast_ether_addr,
663 gd->keyidx, gd->tx, key_rsc, gd->key_rsc_len,
664 _gtk, gd->gtk_len) < 0) {
665 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
666 "WPA: Failed to set GTK to "
667 "the driver (alg=%d keylen=%d keyidx=%d)",
668 gd->alg, gd->gtk_len, gd->keyidx);
669 return -1;
670 }
671
672 return 0;
673 }
674
675
wpa_supplicant_gtk_tx_bit_workaround(const struct wpa_sm * sm,int tx)676 static int wpa_supplicant_gtk_tx_bit_workaround(const struct wpa_sm *sm,
677 int tx)
678 {
679 if (tx && sm->pairwise_cipher != WPA_CIPHER_NONE) {
680 /* Ignore Tx bit for GTK if a pairwise key is used. One AP
681 * seemed to set this bit (incorrectly, since Tx is only when
682 * doing Group Key only APs) and without this workaround, the
683 * data connection does not work because wpa_supplicant
684 * configured non-zero keyidx to be used for unicast. */
685 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
686 "WPA: Tx bit set for GTK, but pairwise "
687 "keys are used - ignore Tx bit");
688 return 0;
689 }
690 return tx;
691 }
692
693
wpa_supplicant_pairwise_gtk(struct wpa_sm * sm,const struct wpa_eapol_key * key,const u8 * gtk,size_t gtk_len,int key_info)694 static int wpa_supplicant_pairwise_gtk(struct wpa_sm *sm,
695 const struct wpa_eapol_key *key,
696 const u8 *gtk, size_t gtk_len,
697 int key_info)
698 {
699 #ifndef CONFIG_NO_WPA2
700 struct wpa_gtk_data gd;
701
702 /*
703 * IEEE Std 802.11i-2004 - 8.5.2 EAPOL-Key frames - Figure 43x
704 * GTK KDE format:
705 * KeyID[bits 0-1], Tx [bit 2], Reserved [bits 3-7]
706 * Reserved [bits 0-7]
707 * GTK
708 */
709
710 os_memset(&gd, 0, sizeof(gd));
711 wpa_hexdump_key(MSG_DEBUG, "RSN: received GTK in pairwise handshake",
712 gtk, gtk_len);
713
714 if (gtk_len < 2 || gtk_len - 2 > sizeof(gd.gtk))
715 return -1;
716
717 gd.keyidx = gtk[0] & 0x3;
718 gd.tx = wpa_supplicant_gtk_tx_bit_workaround(sm,
719 !!(gtk[0] & BIT(2)));
720 gtk += 2;
721 gtk_len -= 2;
722
723 os_memcpy(gd.gtk, gtk, gtk_len);
724 gd.gtk_len = gtk_len;
725
726 if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher,
727 gtk_len, gtk_len,
728 &gd.key_rsc_len, &gd.alg) ||
729 wpa_supplicant_install_gtk(sm, &gd, key->key_rsc)) {
730 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
731 "RSN: Failed to install GTK");
732 return -1;
733 }
734
735 wpa_supplicant_key_neg_complete(sm, sm->bssid,
736 key_info & WPA_KEY_INFO_SECURE);
737 return 0;
738 #else /* CONFIG_NO_WPA2 */
739 return -1;
740 #endif /* CONFIG_NO_WPA2 */
741 }
742
743
ieee80211w_set_keys(struct wpa_sm * sm,struct wpa_eapol_ie_parse * ie)744 static int ieee80211w_set_keys(struct wpa_sm *sm,
745 struct wpa_eapol_ie_parse *ie)
746 {
747 #ifdef CONFIG_IEEE80211W
748 if (sm->mgmt_group_cipher != WPA_CIPHER_AES_128_CMAC)
749 return 0;
750
751 if (ie->igtk) {
752 const struct wpa_igtk_kde *igtk;
753 u16 keyidx;
754 if (ie->igtk_len != sizeof(*igtk))
755 return -1;
756 igtk = (const struct wpa_igtk_kde *) ie->igtk;
757 keyidx = WPA_GET_LE16(igtk->keyid);
758 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: IGTK keyid %d "
759 "pn %02x%02x%02x%02x%02x%02x",
760 keyidx, MAC2STR(igtk->pn));
761 wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK",
762 igtk->igtk, WPA_IGTK_LEN);
763 if (keyidx > 4095) {
764 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
765 "WPA: Invalid IGTK KeyID %d", keyidx);
766 return -1;
767 }
768 if (wpa_sm_set_key(sm, WPA_ALG_IGTK, broadcast_ether_addr,
769 keyidx, 0, igtk->pn, sizeof(igtk->pn),
770 igtk->igtk, WPA_IGTK_LEN) < 0) {
771 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
772 "WPA: Failed to configure IGTK to the driver");
773 return -1;
774 }
775 }
776
777 return 0;
778 #else /* CONFIG_IEEE80211W */
779 return 0;
780 #endif /* CONFIG_IEEE80211W */
781 }
782
783
wpa_report_ie_mismatch(struct wpa_sm * sm,const char * reason,const u8 * src_addr,const u8 * wpa_ie,size_t wpa_ie_len,const u8 * rsn_ie,size_t rsn_ie_len)784 static void wpa_report_ie_mismatch(struct wpa_sm *sm,
785 const char *reason, const u8 *src_addr,
786 const u8 *wpa_ie, size_t wpa_ie_len,
787 const u8 *rsn_ie, size_t rsn_ie_len)
788 {
789 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: %s (src=" MACSTR ")",
790 reason, MAC2STR(src_addr));
791
792 if (sm->ap_wpa_ie) {
793 wpa_hexdump(MSG_INFO, "WPA: WPA IE in Beacon/ProbeResp",
794 sm->ap_wpa_ie, sm->ap_wpa_ie_len);
795 }
796 if (wpa_ie) {
797 if (!sm->ap_wpa_ie) {
798 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
799 "WPA: No WPA IE in Beacon/ProbeResp");
800 }
801 wpa_hexdump(MSG_INFO, "WPA: WPA IE in 3/4 msg",
802 wpa_ie, wpa_ie_len);
803 }
804
805 if (sm->ap_rsn_ie) {
806 wpa_hexdump(MSG_INFO, "WPA: RSN IE in Beacon/ProbeResp",
807 sm->ap_rsn_ie, sm->ap_rsn_ie_len);
808 }
809 if (rsn_ie) {
810 if (!sm->ap_rsn_ie) {
811 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
812 "WPA: No RSN IE in Beacon/ProbeResp");
813 }
814 wpa_hexdump(MSG_INFO, "WPA: RSN IE in 3/4 msg",
815 rsn_ie, rsn_ie_len);
816 }
817
818 wpa_sm_disassociate(sm, WLAN_REASON_IE_IN_4WAY_DIFFERS);
819 }
820
821
822 #ifdef CONFIG_IEEE80211R
823
ft_validate_mdie(struct wpa_sm * sm,const unsigned char * src_addr,struct wpa_eapol_ie_parse * ie,const u8 * assoc_resp_mdie)824 static int ft_validate_mdie(struct wpa_sm *sm,
825 const unsigned char *src_addr,
826 struct wpa_eapol_ie_parse *ie,
827 const u8 *assoc_resp_mdie)
828 {
829 struct rsn_mdie *mdie;
830
831 mdie = (struct rsn_mdie *) (ie->mdie + 2);
832 if (ie->mdie == NULL || ie->mdie_len < 2 + sizeof(*mdie) ||
833 os_memcmp(mdie->mobility_domain, sm->mobility_domain,
834 MOBILITY_DOMAIN_ID_LEN) != 0) {
835 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: MDIE in msg 3/4 did "
836 "not match with the current mobility domain");
837 return -1;
838 }
839
840 if (assoc_resp_mdie &&
841 (assoc_resp_mdie[1] != ie->mdie[1] ||
842 os_memcmp(assoc_resp_mdie, ie->mdie, 2 + ie->mdie[1]) != 0)) {
843 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: MDIE mismatch");
844 wpa_hexdump(MSG_DEBUG, "FT: MDIE in EAPOL-Key msg 3/4",
845 ie->mdie, 2 + ie->mdie[1]);
846 wpa_hexdump(MSG_DEBUG, "FT: MDIE in (Re)Association Response",
847 assoc_resp_mdie, 2 + assoc_resp_mdie[1]);
848 return -1;
849 }
850
851 return 0;
852 }
853
854
ft_validate_ftie(struct wpa_sm * sm,const unsigned char * src_addr,struct wpa_eapol_ie_parse * ie,const u8 * assoc_resp_ftie)855 static int ft_validate_ftie(struct wpa_sm *sm,
856 const unsigned char *src_addr,
857 struct wpa_eapol_ie_parse *ie,
858 const u8 *assoc_resp_ftie)
859 {
860 if (ie->ftie == NULL) {
861 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
862 "FT: No FTIE in EAPOL-Key msg 3/4");
863 return -1;
864 }
865
866 if (assoc_resp_ftie == NULL)
867 return 0;
868
869 if (assoc_resp_ftie[1] != ie->ftie[1] ||
870 os_memcmp(assoc_resp_ftie, ie->ftie, 2 + ie->ftie[1]) != 0) {
871 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: FTIE mismatch");
872 wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 3/4",
873 ie->ftie, 2 + ie->ftie[1]);
874 wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)Association Response",
875 assoc_resp_ftie, 2 + assoc_resp_ftie[1]);
876 return -1;
877 }
878
879 return 0;
880 }
881
882
ft_validate_rsnie(struct wpa_sm * sm,const unsigned char * src_addr,struct wpa_eapol_ie_parse * ie)883 static int ft_validate_rsnie(struct wpa_sm *sm,
884 const unsigned char *src_addr,
885 struct wpa_eapol_ie_parse *ie)
886 {
887 struct wpa_ie_data rsn;
888
889 if (!ie->rsn_ie)
890 return 0;
891
892 /*
893 * Verify that PMKR1Name from EAPOL-Key message 3/4
894 * matches with the value we derived.
895 */
896 if (wpa_parse_wpa_ie_rsn(ie->rsn_ie, ie->rsn_ie_len, &rsn) < 0 ||
897 rsn.num_pmkid != 1 || rsn.pmkid == NULL) {
898 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: No PMKR1Name in "
899 "FT 4-way handshake message 3/4");
900 return -1;
901 }
902
903 if (os_memcmp(rsn.pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN) != 0) {
904 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
905 "FT: PMKR1Name mismatch in "
906 "FT 4-way handshake message 3/4");
907 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Authenticator",
908 rsn.pmkid, WPA_PMK_NAME_LEN);
909 wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name",
910 sm->pmk_r1_name, WPA_PMK_NAME_LEN);
911 return -1;
912 }
913
914 return 0;
915 }
916
917
wpa_supplicant_validate_ie_ft(struct wpa_sm * sm,const unsigned char * src_addr,struct wpa_eapol_ie_parse * ie)918 static int wpa_supplicant_validate_ie_ft(struct wpa_sm *sm,
919 const unsigned char *src_addr,
920 struct wpa_eapol_ie_parse *ie)
921 {
922 const u8 *pos, *end, *mdie = NULL, *ftie = NULL;
923
924 if (sm->assoc_resp_ies) {
925 pos = sm->assoc_resp_ies;
926 end = pos + sm->assoc_resp_ies_len;
927 while (pos + 2 < end) {
928 if (pos + 2 + pos[1] > end)
929 break;
930 switch (*pos) {
931 case WLAN_EID_MOBILITY_DOMAIN:
932 mdie = pos;
933 break;
934 case WLAN_EID_FAST_BSS_TRANSITION:
935 ftie = pos;
936 break;
937 }
938 pos += 2 + pos[1];
939 }
940 }
941
942 if (ft_validate_mdie(sm, src_addr, ie, mdie) < 0 ||
943 ft_validate_ftie(sm, src_addr, ie, ftie) < 0 ||
944 ft_validate_rsnie(sm, src_addr, ie) < 0)
945 return -1;
946
947 return 0;
948 }
949
950 #endif /* CONFIG_IEEE80211R */
951
952
wpa_supplicant_validate_ie(struct wpa_sm * sm,const unsigned char * src_addr,struct wpa_eapol_ie_parse * ie)953 static int wpa_supplicant_validate_ie(struct wpa_sm *sm,
954 const unsigned char *src_addr,
955 struct wpa_eapol_ie_parse *ie)
956 {
957 if (sm->ap_wpa_ie == NULL && sm->ap_rsn_ie == NULL) {
958 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
959 "WPA: No WPA/RSN IE for this AP known. "
960 "Trying to get from scan results");
961 if (wpa_sm_get_beacon_ie(sm) < 0) {
962 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
963 "WPA: Could not find AP from "
964 "the scan results");
965 } else {
966 wpa_msg(sm->ctx->msg_ctx, MSG_DEBUG,
967 "WPA: Found the current AP from "
968 "updated scan results");
969 }
970 }
971
972 if (ie->wpa_ie == NULL && ie->rsn_ie == NULL &&
973 (sm->ap_wpa_ie || sm->ap_rsn_ie)) {
974 wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match "
975 "with IE in Beacon/ProbeResp (no IE?)",
976 src_addr, ie->wpa_ie, ie->wpa_ie_len,
977 ie->rsn_ie, ie->rsn_ie_len);
978 return -1;
979 }
980
981 if ((ie->wpa_ie && sm->ap_wpa_ie &&
982 (ie->wpa_ie_len != sm->ap_wpa_ie_len ||
983 os_memcmp(ie->wpa_ie, sm->ap_wpa_ie, ie->wpa_ie_len) != 0)) ||
984 (ie->rsn_ie && sm->ap_rsn_ie &&
985 wpa_compare_rsn_ie(wpa_key_mgmt_ft(sm->key_mgmt),
986 sm->ap_rsn_ie, sm->ap_rsn_ie_len,
987 ie->rsn_ie, ie->rsn_ie_len))) {
988 wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match "
989 "with IE in Beacon/ProbeResp",
990 src_addr, ie->wpa_ie, ie->wpa_ie_len,
991 ie->rsn_ie, ie->rsn_ie_len);
992 return -1;
993 }
994
995 if (sm->proto == WPA_PROTO_WPA &&
996 ie->rsn_ie && sm->ap_rsn_ie == NULL && sm->rsn_enabled) {
997 wpa_report_ie_mismatch(sm, "Possible downgrade attack "
998 "detected - RSN was enabled and RSN IE "
999 "was in msg 3/4, but not in "
1000 "Beacon/ProbeResp",
1001 src_addr, ie->wpa_ie, ie->wpa_ie_len,
1002 ie->rsn_ie, ie->rsn_ie_len);
1003 return -1;
1004 }
1005
1006 #ifdef CONFIG_IEEE80211R
1007 if (wpa_key_mgmt_ft(sm->key_mgmt) &&
1008 wpa_supplicant_validate_ie_ft(sm, src_addr, ie) < 0)
1009 return -1;
1010 #endif /* CONFIG_IEEE80211R */
1011
1012 return 0;
1013 }
1014
1015
1016 /**
1017 * wpa_supplicant_send_4_of_4 - Send message 4 of WPA/RSN 4-Way Handshake
1018 * @sm: Pointer to WPA state machine data from wpa_sm_init()
1019 * @dst: Destination address for the frame
1020 * @key: Pointer to the EAPOL-Key frame header
1021 * @ver: Version bits from EAPOL-Key Key Info
1022 * @key_info: Key Info
1023 * @kde: KDEs to include the EAPOL-Key frame
1024 * @kde_len: Length of KDEs
1025 * @ptk: PTK to use for keyed hash and encryption
1026 * Returns: 0 on success, -1 on failure
1027 */
wpa_supplicant_send_4_of_4(struct wpa_sm * sm,const unsigned char * dst,const struct wpa_eapol_key * key,u16 ver,u16 key_info,const u8 * kde,size_t kde_len,struct wpa_ptk * ptk)1028 int wpa_supplicant_send_4_of_4(struct wpa_sm *sm, const unsigned char *dst,
1029 const struct wpa_eapol_key *key,
1030 u16 ver, u16 key_info,
1031 const u8 *kde, size_t kde_len,
1032 struct wpa_ptk *ptk)
1033 {
1034 size_t rlen;
1035 struct wpa_eapol_key *reply;
1036 u8 *rbuf;
1037
1038 if (kde)
1039 wpa_hexdump(MSG_DEBUG, "WPA: KDE for msg 4/4", kde, kde_len);
1040
1041 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL,
1042 sizeof(*reply) + kde_len,
1043 &rlen, (void *) &reply);
1044 if (rbuf == NULL)
1045 return -1;
1046
1047 reply->type = sm->proto == WPA_PROTO_RSN ?
1048 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
1049 key_info &= WPA_KEY_INFO_SECURE;
1050 key_info |= ver | WPA_KEY_INFO_KEY_TYPE | WPA_KEY_INFO_MIC;
1051 WPA_PUT_BE16(reply->key_info, key_info);
1052 if (sm->proto == WPA_PROTO_RSN)
1053 WPA_PUT_BE16(reply->key_length, 0);
1054 else
1055 os_memcpy(reply->key_length, key->key_length, 2);
1056 os_memcpy(reply->replay_counter, key->replay_counter,
1057 WPA_REPLAY_COUNTER_LEN);
1058
1059 WPA_PUT_BE16(reply->key_data_length, kde_len);
1060 if (kde)
1061 os_memcpy(reply + 1, kde, kde_len);
1062
1063 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 4/4");
1064 wpa_eapol_key_send(sm, ptk->kck, ver, dst, ETH_P_EAPOL,
1065 rbuf, rlen, reply->key_mic);
1066
1067 return 0;
1068 }
1069
1070
wpa_supplicant_process_3_of_4(struct wpa_sm * sm,const struct wpa_eapol_key * key,u16 ver)1071 static void wpa_supplicant_process_3_of_4(struct wpa_sm *sm,
1072 const struct wpa_eapol_key *key,
1073 u16 ver)
1074 {
1075 u16 key_info, keylen, len;
1076 const u8 *pos;
1077 struct wpa_eapol_ie_parse ie;
1078
1079 wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE);
1080 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 3 of 4-Way "
1081 "Handshake from " MACSTR " (ver=%d)", MAC2STR(sm->bssid), ver);
1082
1083 key_info = WPA_GET_BE16(key->key_info);
1084
1085 pos = (const u8 *) (key + 1);
1086 len = WPA_GET_BE16(key->key_data_length);
1087 wpa_hexdump(MSG_DEBUG, "WPA: IE KeyData", pos, len);
1088 wpa_supplicant_parse_ies(pos, len, &ie);
1089 if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
1090 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1091 "WPA: GTK IE in unencrypted key data");
1092 goto failed;
1093 }
1094 #ifdef CONFIG_IEEE80211W
1095 if (ie.igtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
1096 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1097 "WPA: IGTK KDE in unencrypted key data");
1098 goto failed;
1099 }
1100
1101 if (ie.igtk && ie.igtk_len != sizeof(struct wpa_igtk_kde)) {
1102 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1103 "WPA: Invalid IGTK KDE length %lu",
1104 (unsigned long) ie.igtk_len);
1105 goto failed;
1106 }
1107 #endif /* CONFIG_IEEE80211W */
1108
1109 if (wpa_supplicant_validate_ie(sm, sm->bssid, &ie) < 0)
1110 goto failed;
1111
1112 if (os_memcmp(sm->anonce, key->key_nonce, WPA_NONCE_LEN) != 0) {
1113 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1114 "WPA: ANonce from message 1 of 4-Way Handshake "
1115 "differs from 3 of 4-Way Handshake - drop packet (src="
1116 MACSTR ")", MAC2STR(sm->bssid));
1117 goto failed;
1118 }
1119
1120 keylen = WPA_GET_BE16(key->key_length);
1121 switch (sm->pairwise_cipher) {
1122 case WPA_CIPHER_CCMP:
1123 if (keylen != 16) {
1124 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1125 "WPA: Invalid CCMP key length %d (src=" MACSTR
1126 ")", keylen, MAC2STR(sm->bssid));
1127 goto failed;
1128 }
1129 break;
1130 case WPA_CIPHER_TKIP:
1131 if (keylen != 32) {
1132 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1133 "WPA: Invalid TKIP key length %d (src=" MACSTR
1134 ")", keylen, MAC2STR(sm->bssid));
1135 goto failed;
1136 }
1137 break;
1138 }
1139
1140 if (wpa_supplicant_send_4_of_4(sm, sm->bssid, key, ver, key_info,
1141 NULL, 0, &sm->ptk)) {
1142 goto failed;
1143 }
1144
1145 /* SNonce was successfully used in msg 3/4, so mark it to be renewed
1146 * for the next 4-Way Handshake. If msg 3 is received again, the old
1147 * SNonce will still be used to avoid changing PTK. */
1148 sm->renew_snonce = 1;
1149
1150 if (key_info & WPA_KEY_INFO_INSTALL) {
1151 if (wpa_supplicant_install_ptk(sm, key))
1152 goto failed;
1153 }
1154
1155 if (key_info & WPA_KEY_INFO_SECURE) {
1156 wpa_sm_mlme_setprotection(
1157 sm, sm->bssid, MLME_SETPROTECTION_PROTECT_TYPE_RX,
1158 MLME_SETPROTECTION_KEY_TYPE_PAIRWISE);
1159 eapol_sm_notify_portValid(sm->eapol, TRUE);
1160 }
1161 wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE);
1162
1163 if (ie.gtk &&
1164 wpa_supplicant_pairwise_gtk(sm, key,
1165 ie.gtk, ie.gtk_len, key_info) < 0) {
1166 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1167 "RSN: Failed to configure GTK");
1168 goto failed;
1169 }
1170
1171 if (ieee80211w_set_keys(sm, &ie) < 0) {
1172 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1173 "RSN: Failed to configure IGTK");
1174 goto failed;
1175 }
1176
1177 return;
1178
1179 failed:
1180 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED);
1181 }
1182
1183
wpa_supplicant_process_1_of_2_rsn(struct wpa_sm * sm,const u8 * keydata,size_t keydatalen,u16 key_info,struct wpa_gtk_data * gd)1184 static int wpa_supplicant_process_1_of_2_rsn(struct wpa_sm *sm,
1185 const u8 *keydata,
1186 size_t keydatalen,
1187 u16 key_info,
1188 struct wpa_gtk_data *gd)
1189 {
1190 int maxkeylen;
1191 struct wpa_eapol_ie_parse ie;
1192
1193 wpa_hexdump(MSG_DEBUG, "RSN: msg 1/2 key data", keydata, keydatalen);
1194 wpa_supplicant_parse_ies(keydata, keydatalen, &ie);
1195 if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
1196 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1197 "WPA: GTK IE in unencrypted key data");
1198 return -1;
1199 }
1200 if (ie.gtk == NULL) {
1201 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1202 "WPA: No GTK IE in Group Key msg 1/2");
1203 return -1;
1204 }
1205 maxkeylen = gd->gtk_len = ie.gtk_len - 2;
1206
1207 if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher,
1208 gd->gtk_len, maxkeylen,
1209 &gd->key_rsc_len, &gd->alg))
1210 return -1;
1211
1212 wpa_hexdump(MSG_DEBUG, "RSN: received GTK in group key handshake",
1213 ie.gtk, ie.gtk_len);
1214 gd->keyidx = ie.gtk[0] & 0x3;
1215 gd->tx = wpa_supplicant_gtk_tx_bit_workaround(sm,
1216 !!(ie.gtk[0] & BIT(2)));
1217 if (ie.gtk_len - 2 > sizeof(gd->gtk)) {
1218 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1219 "RSN: Too long GTK in GTK IE (len=%lu)",
1220 (unsigned long) ie.gtk_len - 2);
1221 return -1;
1222 }
1223 os_memcpy(gd->gtk, ie.gtk + 2, ie.gtk_len - 2);
1224
1225 if (ieee80211w_set_keys(sm, &ie) < 0)
1226 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1227 "RSN: Failed to configure IGTK");
1228
1229 return 0;
1230 }
1231
1232
wpa_supplicant_process_1_of_2_wpa(struct wpa_sm * sm,const struct wpa_eapol_key * key,size_t keydatalen,int key_info,size_t extra_len,u16 ver,struct wpa_gtk_data * gd)1233 static int wpa_supplicant_process_1_of_2_wpa(struct wpa_sm *sm,
1234 const struct wpa_eapol_key *key,
1235 size_t keydatalen, int key_info,
1236 size_t extra_len, u16 ver,
1237 struct wpa_gtk_data *gd)
1238 {
1239 size_t maxkeylen;
1240 u8 ek[32];
1241
1242 gd->gtk_len = WPA_GET_BE16(key->key_length);
1243 maxkeylen = keydatalen;
1244 if (keydatalen > extra_len) {
1245 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1246 "WPA: Truncated EAPOL-Key packet: "
1247 "key_data_length=%lu > extra_len=%lu",
1248 (unsigned long) keydatalen, (unsigned long) extra_len);
1249 return -1;
1250 }
1251 if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
1252 if (maxkeylen < 8) {
1253 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1254 "WPA: Too short maxkeylen (%lu)",
1255 (unsigned long) maxkeylen);
1256 return -1;
1257 }
1258 maxkeylen -= 8;
1259 }
1260
1261 if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher,
1262 gd->gtk_len, maxkeylen,
1263 &gd->key_rsc_len, &gd->alg))
1264 return -1;
1265
1266 gd->keyidx = (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >>
1267 WPA_KEY_INFO_KEY_INDEX_SHIFT;
1268 if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4) {
1269 os_memcpy(ek, key->key_iv, 16);
1270 os_memcpy(ek + 16, sm->ptk.kek, 16);
1271 if (keydatalen > sizeof(gd->gtk)) {
1272 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1273 "WPA: RC4 key data too long (%lu)",
1274 (unsigned long) keydatalen);
1275 return -1;
1276 }
1277 os_memcpy(gd->gtk, key + 1, keydatalen);
1278 if (rc4_skip(ek, 32, 256, gd->gtk, keydatalen)) {
1279 wpa_msg(sm->ctx->msg_ctx, MSG_ERROR,
1280 "WPA: RC4 failed");
1281 return -1;
1282 }
1283 } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
1284 if (keydatalen % 8) {
1285 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1286 "WPA: Unsupported AES-WRAP len %lu",
1287 (unsigned long) keydatalen);
1288 return -1;
1289 }
1290 if (maxkeylen > sizeof(gd->gtk)) {
1291 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1292 "WPA: AES-WRAP key data "
1293 "too long (keydatalen=%lu maxkeylen=%lu)",
1294 (unsigned long) keydatalen,
1295 (unsigned long) maxkeylen);
1296 return -1;
1297 }
1298 if (aes_unwrap(sm->ptk.kek, maxkeylen / 8,
1299 (const u8 *) (key + 1), gd->gtk)) {
1300 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1301 "WPA: AES unwrap failed - could not decrypt "
1302 "GTK");
1303 return -1;
1304 }
1305 } else {
1306 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1307 "WPA: Unsupported key_info type %d", ver);
1308 return -1;
1309 }
1310 gd->tx = wpa_supplicant_gtk_tx_bit_workaround(
1311 sm, !!(key_info & WPA_KEY_INFO_TXRX));
1312 return 0;
1313 }
1314
1315
wpa_supplicant_send_2_of_2(struct wpa_sm * sm,const struct wpa_eapol_key * key,int ver,u16 key_info)1316 static int wpa_supplicant_send_2_of_2(struct wpa_sm *sm,
1317 const struct wpa_eapol_key *key,
1318 int ver, u16 key_info)
1319 {
1320 size_t rlen;
1321 struct wpa_eapol_key *reply;
1322 u8 *rbuf;
1323
1324 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL,
1325 sizeof(*reply), &rlen, (void *) &reply);
1326 if (rbuf == NULL)
1327 return -1;
1328
1329 reply->type = sm->proto == WPA_PROTO_RSN ?
1330 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
1331 key_info &= WPA_KEY_INFO_KEY_INDEX_MASK;
1332 key_info |= ver | WPA_KEY_INFO_MIC | WPA_KEY_INFO_SECURE;
1333 WPA_PUT_BE16(reply->key_info, key_info);
1334 if (sm->proto == WPA_PROTO_RSN)
1335 WPA_PUT_BE16(reply->key_length, 0);
1336 else
1337 os_memcpy(reply->key_length, key->key_length, 2);
1338 os_memcpy(reply->replay_counter, key->replay_counter,
1339 WPA_REPLAY_COUNTER_LEN);
1340
1341 WPA_PUT_BE16(reply->key_data_length, 0);
1342
1343 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 2/2");
1344 wpa_eapol_key_send(sm, sm->ptk.kck, ver, sm->bssid, ETH_P_EAPOL,
1345 rbuf, rlen, reply->key_mic);
1346
1347 return 0;
1348 }
1349
1350
wpa_supplicant_process_1_of_2(struct wpa_sm * sm,const unsigned char * src_addr,const struct wpa_eapol_key * key,int extra_len,u16 ver)1351 static void wpa_supplicant_process_1_of_2(struct wpa_sm *sm,
1352 const unsigned char *src_addr,
1353 const struct wpa_eapol_key *key,
1354 int extra_len, u16 ver)
1355 {
1356 u16 key_info, keydatalen;
1357 int rekey, ret;
1358 struct wpa_gtk_data gd;
1359
1360 os_memset(&gd, 0, sizeof(gd));
1361
1362 rekey = wpa_sm_get_state(sm) == WPA_COMPLETED;
1363 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 1 of Group Key "
1364 "Handshake from " MACSTR " (ver=%d)", MAC2STR(src_addr), ver);
1365
1366 key_info = WPA_GET_BE16(key->key_info);
1367 keydatalen = WPA_GET_BE16(key->key_data_length);
1368
1369 if (sm->proto == WPA_PROTO_RSN) {
1370 ret = wpa_supplicant_process_1_of_2_rsn(sm,
1371 (const u8 *) (key + 1),
1372 keydatalen, key_info,
1373 &gd);
1374 } else {
1375 ret = wpa_supplicant_process_1_of_2_wpa(sm, key, keydatalen,
1376 key_info, extra_len,
1377 ver, &gd);
1378 }
1379
1380 wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE);
1381
1382 if (ret)
1383 goto failed;
1384
1385 if (wpa_supplicant_install_gtk(sm, &gd, key->key_rsc) ||
1386 wpa_supplicant_send_2_of_2(sm, key, ver, key_info))
1387 goto failed;
1388
1389 if (rekey) {
1390 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Group rekeying "
1391 "completed with " MACSTR " [GTK=%s]",
1392 MAC2STR(sm->bssid), wpa_cipher_txt(sm->group_cipher));
1393 wpa_sm_cancel_auth_timeout(sm);
1394 wpa_sm_set_state(sm, WPA_COMPLETED);
1395 } else {
1396 wpa_supplicant_key_neg_complete(sm, sm->bssid,
1397 key_info &
1398 WPA_KEY_INFO_SECURE);
1399 }
1400 return;
1401
1402 failed:
1403 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED);
1404 }
1405
1406
wpa_supplicant_verify_eapol_key_mic(struct wpa_sm * sm,struct wpa_eapol_key * key,u16 ver,const u8 * buf,size_t len)1407 static int wpa_supplicant_verify_eapol_key_mic(struct wpa_sm *sm,
1408 struct wpa_eapol_key *key,
1409 u16 ver,
1410 const u8 *buf, size_t len)
1411 {
1412 u8 mic[16];
1413 int ok = 0;
1414
1415 os_memcpy(mic, key->key_mic, 16);
1416 if (sm->tptk_set) {
1417 os_memset(key->key_mic, 0, 16);
1418 wpa_eapol_key_mic(sm->tptk.kck, ver, buf, len,
1419 key->key_mic);
1420 if (os_memcmp(mic, key->key_mic, 16) != 0) {
1421 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1422 "WPA: Invalid EAPOL-Key MIC "
1423 "when using TPTK - ignoring TPTK");
1424 } else {
1425 ok = 1;
1426 sm->tptk_set = 0;
1427 sm->ptk_set = 1;
1428 os_memcpy(&sm->ptk, &sm->tptk, sizeof(sm->ptk));
1429 }
1430 }
1431
1432 if (!ok && sm->ptk_set) {
1433 os_memset(key->key_mic, 0, 16);
1434 wpa_eapol_key_mic(sm->ptk.kck, ver, buf, len,
1435 key->key_mic);
1436 if (os_memcmp(mic, key->key_mic, 16) != 0) {
1437 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1438 "WPA: Invalid EAPOL-Key MIC - "
1439 "dropping packet");
1440 return -1;
1441 }
1442 ok = 1;
1443 }
1444
1445 if (!ok) {
1446 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1447 "WPA: Could not verify EAPOL-Key MIC - "
1448 "dropping packet");
1449 return -1;
1450 }
1451
1452 os_memcpy(sm->rx_replay_counter, key->replay_counter,
1453 WPA_REPLAY_COUNTER_LEN);
1454 sm->rx_replay_counter_set = 1;
1455 return 0;
1456 }
1457
1458
1459 /* Decrypt RSN EAPOL-Key key data (RC4 or AES-WRAP) */
wpa_supplicant_decrypt_key_data(struct wpa_sm * sm,struct wpa_eapol_key * key,u16 ver)1460 static int wpa_supplicant_decrypt_key_data(struct wpa_sm *sm,
1461 struct wpa_eapol_key *key, u16 ver)
1462 {
1463 u16 keydatalen = WPA_GET_BE16(key->key_data_length);
1464
1465 wpa_hexdump(MSG_DEBUG, "RSN: encrypted key data",
1466 (u8 *) (key + 1), keydatalen);
1467 if (!sm->ptk_set) {
1468 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1469 "WPA: PTK not available, cannot decrypt EAPOL-Key Key "
1470 "Data");
1471 return -1;
1472 }
1473
1474 /* Decrypt key data here so that this operation does not need
1475 * to be implemented separately for each message type. */
1476 if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4) {
1477 u8 ek[32];
1478 os_memcpy(ek, key->key_iv, 16);
1479 os_memcpy(ek + 16, sm->ptk.kek, 16);
1480 if (rc4_skip(ek, 32, 256, (u8 *) (key + 1), keydatalen)) {
1481 wpa_msg(sm->ctx->msg_ctx, MSG_ERROR,
1482 "WPA: RC4 failed");
1483 return -1;
1484 }
1485 } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
1486 ver == WPA_KEY_INFO_TYPE_AES_128_CMAC) {
1487 u8 *buf;
1488 if (keydatalen % 8) {
1489 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1490 "WPA: Unsupported AES-WRAP len %d",
1491 keydatalen);
1492 return -1;
1493 }
1494 keydatalen -= 8; /* AES-WRAP adds 8 bytes */
1495 buf = os_malloc(keydatalen);
1496 if (buf == NULL) {
1497 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1498 "WPA: No memory for AES-UNWRAP buffer");
1499 return -1;
1500 }
1501 if (aes_unwrap(sm->ptk.kek, keydatalen / 8,
1502 (u8 *) (key + 1), buf)) {
1503 os_free(buf);
1504 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1505 "WPA: AES unwrap failed - "
1506 "could not decrypt EAPOL-Key key data");
1507 return -1;
1508 }
1509 os_memcpy(key + 1, buf, keydatalen);
1510 os_free(buf);
1511 WPA_PUT_BE16(key->key_data_length, keydatalen);
1512 } else {
1513 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1514 "WPA: Unsupported key_info type %d", ver);
1515 return -1;
1516 }
1517 wpa_hexdump_key(MSG_DEBUG, "WPA: decrypted EAPOL-Key key data",
1518 (u8 *) (key + 1), keydatalen);
1519 return 0;
1520 }
1521
1522
1523 /**
1524 * wpa_sm_aborted_cached - Notify WPA that PMKSA caching was aborted
1525 * @sm: Pointer to WPA state machine data from wpa_sm_init()
1526 */
wpa_sm_aborted_cached(struct wpa_sm * sm)1527 void wpa_sm_aborted_cached(struct wpa_sm *sm)
1528 {
1529 if (sm && sm->cur_pmksa) {
1530 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
1531 "RSN: Cancelling PMKSA caching attempt");
1532 sm->cur_pmksa = NULL;
1533 }
1534 }
1535
1536
wpa_eapol_key_dump(struct wpa_sm * sm,const struct wpa_eapol_key * key)1537 static void wpa_eapol_key_dump(struct wpa_sm *sm,
1538 const struct wpa_eapol_key *key)
1539 {
1540 #ifndef CONFIG_NO_STDOUT_DEBUG
1541 u16 key_info = WPA_GET_BE16(key->key_info);
1542
1543 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, " EAPOL-Key type=%d", key->type);
1544 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
1545 " key_info 0x%x (ver=%d keyidx=%d rsvd=%d %s%s%s%s%s%s%s%s)",
1546 key_info, key_info & WPA_KEY_INFO_TYPE_MASK,
1547 (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >>
1548 WPA_KEY_INFO_KEY_INDEX_SHIFT,
1549 (key_info & (BIT(13) | BIT(14) | BIT(15))) >> 13,
1550 key_info & WPA_KEY_INFO_KEY_TYPE ? "Pairwise" : "Group",
1551 key_info & WPA_KEY_INFO_INSTALL ? " Install" : "",
1552 key_info & WPA_KEY_INFO_ACK ? " Ack" : "",
1553 key_info & WPA_KEY_INFO_MIC ? " MIC" : "",
1554 key_info & WPA_KEY_INFO_SECURE ? " Secure" : "",
1555 key_info & WPA_KEY_INFO_ERROR ? " Error" : "",
1556 key_info & WPA_KEY_INFO_REQUEST ? " Request" : "",
1557 key_info & WPA_KEY_INFO_ENCR_KEY_DATA ? " Encr" : "");
1558 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
1559 " key_length=%u key_data_length=%u",
1560 WPA_GET_BE16(key->key_length),
1561 WPA_GET_BE16(key->key_data_length));
1562 wpa_hexdump(MSG_DEBUG, " replay_counter",
1563 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
1564 wpa_hexdump(MSG_DEBUG, " key_nonce", key->key_nonce, WPA_NONCE_LEN);
1565 wpa_hexdump(MSG_DEBUG, " key_iv", key->key_iv, 16);
1566 wpa_hexdump(MSG_DEBUG, " key_rsc", key->key_rsc, 8);
1567 wpa_hexdump(MSG_DEBUG, " key_id (reserved)", key->key_id, 8);
1568 wpa_hexdump(MSG_DEBUG, " key_mic", key->key_mic, 16);
1569 #endif /* CONFIG_NO_STDOUT_DEBUG */
1570 }
1571
1572
1573 /**
1574 * wpa_sm_rx_eapol - Process received WPA EAPOL frames
1575 * @sm: Pointer to WPA state machine data from wpa_sm_init()
1576 * @src_addr: Source MAC address of the EAPOL packet
1577 * @buf: Pointer to the beginning of the EAPOL data (EAPOL header)
1578 * @len: Length of the EAPOL frame
1579 * Returns: 1 = WPA EAPOL-Key processed, 0 = not a WPA EAPOL-Key, -1 failure
1580 *
1581 * This function is called for each received EAPOL frame. Other than EAPOL-Key
1582 * frames can be skipped if filtering is done elsewhere. wpa_sm_rx_eapol() is
1583 * only processing WPA and WPA2 EAPOL-Key frames.
1584 *
1585 * The received EAPOL-Key packets are validated and valid packets are replied
1586 * to. In addition, key material (PTK, GTK) is configured at the end of a
1587 * successful key handshake.
1588 */
wpa_sm_rx_eapol(struct wpa_sm * sm,const u8 * src_addr,const u8 * buf,size_t len)1589 int wpa_sm_rx_eapol(struct wpa_sm *sm, const u8 *src_addr,
1590 const u8 *buf, size_t len)
1591 {
1592 size_t plen, data_len, extra_len;
1593 struct ieee802_1x_hdr *hdr;
1594 struct wpa_eapol_key *key;
1595 u16 key_info, ver;
1596 u8 *tmp;
1597 int ret = -1;
1598 struct wpa_peerkey *peerkey = NULL;
1599
1600 #ifdef CONFIG_IEEE80211R
1601 sm->ft_completed = 0;
1602 #endif /* CONFIG_IEEE80211R */
1603
1604 if (len < sizeof(*hdr) + sizeof(*key)) {
1605 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
1606 "WPA: EAPOL frame too short to be a WPA "
1607 "EAPOL-Key (len %lu, expecting at least %lu)",
1608 (unsigned long) len,
1609 (unsigned long) sizeof(*hdr) + sizeof(*key));
1610 return 0;
1611 }
1612
1613 tmp = os_malloc(len);
1614 if (tmp == NULL)
1615 return -1;
1616 os_memcpy(tmp, buf, len);
1617
1618 hdr = (struct ieee802_1x_hdr *) tmp;
1619 key = (struct wpa_eapol_key *) (hdr + 1);
1620 plen = be_to_host16(hdr->length);
1621 data_len = plen + sizeof(*hdr);
1622 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
1623 "IEEE 802.1X RX: version=%d type=%d length=%lu",
1624 hdr->version, hdr->type, (unsigned long) plen);
1625
1626 if (hdr->version < EAPOL_VERSION) {
1627 /* TODO: backwards compatibility */
1628 }
1629 if (hdr->type != IEEE802_1X_TYPE_EAPOL_KEY) {
1630 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
1631 "WPA: EAPOL frame (type %u) discarded, "
1632 "not a Key frame", hdr->type);
1633 ret = 0;
1634 goto out;
1635 }
1636 if (plen > len - sizeof(*hdr) || plen < sizeof(*key)) {
1637 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
1638 "WPA: EAPOL frame payload size %lu "
1639 "invalid (frame size %lu)",
1640 (unsigned long) plen, (unsigned long) len);
1641 ret = 0;
1642 goto out;
1643 }
1644
1645 if (key->type != EAPOL_KEY_TYPE_WPA && key->type != EAPOL_KEY_TYPE_RSN)
1646 {
1647 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
1648 "WPA: EAPOL-Key type (%d) unknown, discarded",
1649 key->type);
1650 ret = 0;
1651 goto out;
1652 }
1653 wpa_eapol_key_dump(sm, key);
1654
1655 eapol_sm_notify_lower_layer_success(sm->eapol, 0);
1656 wpa_hexdump(MSG_MSGDUMP, "WPA: RX EAPOL-Key", tmp, len);
1657 if (data_len < len) {
1658 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
1659 "WPA: ignoring %lu bytes after the IEEE 802.1X data",
1660 (unsigned long) len - data_len);
1661 }
1662 key_info = WPA_GET_BE16(key->key_info);
1663 ver = key_info & WPA_KEY_INFO_TYPE_MASK;
1664 if (ver != WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 &&
1665 #if defined(CONFIG_IEEE80211R) || defined(CONFIG_IEEE80211W)
1666 ver != WPA_KEY_INFO_TYPE_AES_128_CMAC &&
1667 #endif /* CONFIG_IEEE80211R || CONFIG_IEEE80211W */
1668 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
1669 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1670 "WPA: Unsupported EAPOL-Key descriptor version %d",
1671 ver);
1672 goto out;
1673 }
1674
1675 #ifdef CONFIG_IEEE80211R
1676 if (wpa_key_mgmt_ft(sm->key_mgmt)) {
1677 /* IEEE 802.11r uses a new key_info type (AES-128-CMAC). */
1678 if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) {
1679 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1680 "FT: AP did not use AES-128-CMAC");
1681 goto out;
1682 }
1683 } else
1684 #endif /* CONFIG_IEEE80211R */
1685 #ifdef CONFIG_IEEE80211W
1686 if (wpa_key_mgmt_sha256(sm->key_mgmt)) {
1687 if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) {
1688 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1689 "WPA: AP did not use the "
1690 "negotiated AES-128-CMAC");
1691 goto out;
1692 }
1693 } else
1694 #endif /* CONFIG_IEEE80211W */
1695 if (sm->pairwise_cipher == WPA_CIPHER_CCMP &&
1696 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
1697 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1698 "WPA: CCMP is used, but EAPOL-Key "
1699 "descriptor version (%d) is not 2", ver);
1700 if (sm->group_cipher != WPA_CIPHER_CCMP &&
1701 !(key_info & WPA_KEY_INFO_KEY_TYPE)) {
1702 /* Earlier versions of IEEE 802.11i did not explicitly
1703 * require version 2 descriptor for all EAPOL-Key
1704 * packets, so allow group keys to use version 1 if
1705 * CCMP is not used for them. */
1706 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1707 "WPA: Backwards compatibility: allow invalid "
1708 "version for non-CCMP group keys");
1709 } else
1710 goto out;
1711 }
1712
1713 #ifdef CONFIG_PEERKEY
1714 for (peerkey = sm->peerkey; peerkey; peerkey = peerkey->next) {
1715 if (os_memcmp(peerkey->addr, src_addr, ETH_ALEN) == 0)
1716 break;
1717 }
1718
1719 if (!(key_info & WPA_KEY_INFO_SMK_MESSAGE) && peerkey) {
1720 if (!peerkey->initiator && peerkey->replay_counter_set &&
1721 os_memcmp(key->replay_counter, peerkey->replay_counter,
1722 WPA_REPLAY_COUNTER_LEN) <= 0) {
1723 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1724 "RSN: EAPOL-Key Replay Counter did not "
1725 "increase (STK) - dropping packet");
1726 goto out;
1727 } else if (peerkey->initiator) {
1728 u8 _tmp[WPA_REPLAY_COUNTER_LEN];
1729 os_memcpy(_tmp, key->replay_counter,
1730 WPA_REPLAY_COUNTER_LEN);
1731 inc_byte_array(_tmp, WPA_REPLAY_COUNTER_LEN);
1732 if (os_memcmp(_tmp, peerkey->replay_counter,
1733 WPA_REPLAY_COUNTER_LEN) != 0) {
1734 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
1735 "RSN: EAPOL-Key Replay "
1736 "Counter did not match (STK) - "
1737 "dropping packet");
1738 goto out;
1739 }
1740 }
1741 }
1742
1743 if (peerkey && peerkey->initiator && (key_info & WPA_KEY_INFO_ACK)) {
1744 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1745 "RSN: Ack bit in key_info from STK peer");
1746 goto out;
1747 }
1748 #endif /* CONFIG_PEERKEY */
1749
1750 if (!peerkey && sm->rx_replay_counter_set &&
1751 os_memcmp(key->replay_counter, sm->rx_replay_counter,
1752 WPA_REPLAY_COUNTER_LEN) <= 0) {
1753 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1754 "WPA: EAPOL-Key Replay Counter did not increase - "
1755 "dropping packet");
1756 goto out;
1757 }
1758
1759 if (!(key_info & (WPA_KEY_INFO_ACK | WPA_KEY_INFO_SMK_MESSAGE))
1760 #ifdef CONFIG_PEERKEY
1761 && (peerkey == NULL || !peerkey->initiator)
1762 #endif /* CONFIG_PEERKEY */
1763 ) {
1764 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1765 "WPA: No Ack bit in key_info");
1766 goto out;
1767 }
1768
1769 if (key_info & WPA_KEY_INFO_REQUEST) {
1770 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1771 "WPA: EAPOL-Key with Request bit - dropped");
1772 goto out;
1773 }
1774
1775 if ((key_info & WPA_KEY_INFO_MIC) && !peerkey &&
1776 wpa_supplicant_verify_eapol_key_mic(sm, key, ver, tmp, data_len))
1777 goto out;
1778
1779 #ifdef CONFIG_PEERKEY
1780 if ((key_info & WPA_KEY_INFO_MIC) && peerkey &&
1781 peerkey_verify_eapol_key_mic(sm, peerkey, key, ver, tmp, data_len))
1782 goto out;
1783 #endif /* CONFIG_PEERKEY */
1784
1785 extra_len = data_len - sizeof(*hdr) - sizeof(*key);
1786
1787 if (WPA_GET_BE16(key->key_data_length) > extra_len) {
1788 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Invalid EAPOL-Key "
1789 "frame - key_data overflow (%d > %lu)",
1790 WPA_GET_BE16(key->key_data_length),
1791 (unsigned long) extra_len);
1792 goto out;
1793 }
1794 extra_len = WPA_GET_BE16(key->key_data_length);
1795
1796 if (sm->proto == WPA_PROTO_RSN &&
1797 (key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
1798 if (wpa_supplicant_decrypt_key_data(sm, key, ver))
1799 goto out;
1800 extra_len = WPA_GET_BE16(key->key_data_length);
1801 }
1802
1803 if (key_info & WPA_KEY_INFO_KEY_TYPE) {
1804 if (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) {
1805 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1806 "WPA: Ignored EAPOL-Key (Pairwise) with "
1807 "non-zero key index");
1808 goto out;
1809 }
1810 if (peerkey) {
1811 /* PeerKey 4-Way Handshake */
1812 peerkey_rx_eapol_4way(sm, peerkey, key, key_info, ver);
1813 } else if (key_info & WPA_KEY_INFO_MIC) {
1814 /* 3/4 4-Way Handshake */
1815 wpa_supplicant_process_3_of_4(sm, key, ver);
1816 } else {
1817 /* 1/4 4-Way Handshake */
1818 wpa_supplicant_process_1_of_4(sm, src_addr, key,
1819 ver);
1820 }
1821 } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) {
1822 /* PeerKey SMK Handshake */
1823 peerkey_rx_eapol_smk(sm, src_addr, key, extra_len, key_info,
1824 ver);
1825 } else {
1826 if (key_info & WPA_KEY_INFO_MIC) {
1827 /* 1/2 Group Key Handshake */
1828 wpa_supplicant_process_1_of_2(sm, src_addr, key,
1829 extra_len, ver);
1830 } else {
1831 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1832 "WPA: EAPOL-Key (Group) without Mic bit - "
1833 "dropped");
1834 }
1835 }
1836
1837 ret = 1;
1838
1839 out:
1840 os_free(tmp);
1841 return ret;
1842 }
1843
1844
1845 #ifdef CONFIG_CTRL_IFACE
wpa_cipher_bits(int cipher)1846 static int wpa_cipher_bits(int cipher)
1847 {
1848 switch (cipher) {
1849 case WPA_CIPHER_CCMP:
1850 return 128;
1851 case WPA_CIPHER_TKIP:
1852 return 256;
1853 case WPA_CIPHER_WEP104:
1854 return 104;
1855 case WPA_CIPHER_WEP40:
1856 return 40;
1857 default:
1858 return 0;
1859 }
1860 }
1861
1862
wpa_key_mgmt_suite(struct wpa_sm * sm)1863 static u32 wpa_key_mgmt_suite(struct wpa_sm *sm)
1864 {
1865 switch (sm->key_mgmt) {
1866 case WPA_KEY_MGMT_IEEE8021X:
1867 return (sm->proto == WPA_PROTO_RSN ?
1868 RSN_AUTH_KEY_MGMT_UNSPEC_802_1X :
1869 WPA_AUTH_KEY_MGMT_UNSPEC_802_1X);
1870 case WPA_KEY_MGMT_PSK:
1871 return (sm->proto == WPA_PROTO_RSN ?
1872 RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X :
1873 WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X);
1874 #ifdef CONFIG_IEEE80211R
1875 case WPA_KEY_MGMT_FT_IEEE8021X:
1876 return RSN_AUTH_KEY_MGMT_FT_802_1X;
1877 case WPA_KEY_MGMT_FT_PSK:
1878 return RSN_AUTH_KEY_MGMT_FT_PSK;
1879 #endif /* CONFIG_IEEE80211R */
1880 #ifdef CONFIG_IEEE80211W
1881 case WPA_KEY_MGMT_IEEE8021X_SHA256:
1882 return RSN_AUTH_KEY_MGMT_802_1X_SHA256;
1883 case WPA_KEY_MGMT_PSK_SHA256:
1884 return RSN_AUTH_KEY_MGMT_PSK_SHA256;
1885 #endif /* CONFIG_IEEE80211W */
1886 case WPA_KEY_MGMT_WPA_NONE:
1887 return WPA_AUTH_KEY_MGMT_NONE;
1888 default:
1889 return 0;
1890 }
1891 }
1892
1893
wpa_cipher_suite(struct wpa_sm * sm,int cipher)1894 static u32 wpa_cipher_suite(struct wpa_sm *sm, int cipher)
1895 {
1896 switch (cipher) {
1897 case WPA_CIPHER_CCMP:
1898 return (sm->proto == WPA_PROTO_RSN ?
1899 RSN_CIPHER_SUITE_CCMP : WPA_CIPHER_SUITE_CCMP);
1900 case WPA_CIPHER_TKIP:
1901 return (sm->proto == WPA_PROTO_RSN ?
1902 RSN_CIPHER_SUITE_TKIP : WPA_CIPHER_SUITE_TKIP);
1903 case WPA_CIPHER_WEP104:
1904 return (sm->proto == WPA_PROTO_RSN ?
1905 RSN_CIPHER_SUITE_WEP104 : WPA_CIPHER_SUITE_WEP104);
1906 case WPA_CIPHER_WEP40:
1907 return (sm->proto == WPA_PROTO_RSN ?
1908 RSN_CIPHER_SUITE_WEP40 : WPA_CIPHER_SUITE_WEP40);
1909 case WPA_CIPHER_NONE:
1910 return (sm->proto == WPA_PROTO_RSN ?
1911 RSN_CIPHER_SUITE_NONE : WPA_CIPHER_SUITE_NONE);
1912 default:
1913 return 0;
1914 }
1915 }
1916
1917
1918 #define RSN_SUITE "%02x-%02x-%02x-%d"
1919 #define RSN_SUITE_ARG(s) \
1920 ((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff
1921
1922 /**
1923 * wpa_sm_get_mib - Dump text list of MIB entries
1924 * @sm: Pointer to WPA state machine data from wpa_sm_init()
1925 * @buf: Buffer for the list
1926 * @buflen: Length of the buffer
1927 * Returns: Number of bytes written to buffer
1928 *
1929 * This function is used fetch dot11 MIB variables.
1930 */
wpa_sm_get_mib(struct wpa_sm * sm,char * buf,size_t buflen)1931 int wpa_sm_get_mib(struct wpa_sm *sm, char *buf, size_t buflen)
1932 {
1933 char pmkid_txt[PMKID_LEN * 2 + 1];
1934 int rsna, ret;
1935 size_t len;
1936
1937 if (sm->cur_pmksa) {
1938 wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt),
1939 sm->cur_pmksa->pmkid, PMKID_LEN);
1940 } else
1941 pmkid_txt[0] = '\0';
1942
1943 if ((wpa_key_mgmt_wpa_psk(sm->key_mgmt) ||
1944 wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt)) &&
1945 sm->proto == WPA_PROTO_RSN)
1946 rsna = 1;
1947 else
1948 rsna = 0;
1949
1950 ret = os_snprintf(buf, buflen,
1951 "dot11RSNAOptionImplemented=TRUE\n"
1952 "dot11RSNAPreauthenticationImplemented=TRUE\n"
1953 "dot11RSNAEnabled=%s\n"
1954 "dot11RSNAPreauthenticationEnabled=%s\n"
1955 "dot11RSNAConfigVersion=%d\n"
1956 "dot11RSNAConfigPairwiseKeysSupported=5\n"
1957 "dot11RSNAConfigGroupCipherSize=%d\n"
1958 "dot11RSNAConfigPMKLifetime=%d\n"
1959 "dot11RSNAConfigPMKReauthThreshold=%d\n"
1960 "dot11RSNAConfigNumberOfPTKSAReplayCounters=1\n"
1961 "dot11RSNAConfigSATimeout=%d\n",
1962 rsna ? "TRUE" : "FALSE",
1963 rsna ? "TRUE" : "FALSE",
1964 RSN_VERSION,
1965 wpa_cipher_bits(sm->group_cipher),
1966 sm->dot11RSNAConfigPMKLifetime,
1967 sm->dot11RSNAConfigPMKReauthThreshold,
1968 sm->dot11RSNAConfigSATimeout);
1969 if (ret < 0 || (size_t) ret >= buflen)
1970 return 0;
1971 len = ret;
1972
1973 ret = os_snprintf(
1974 buf + len, buflen - len,
1975 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n"
1976 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n"
1977 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n"
1978 "dot11RSNAPMKIDUsed=%s\n"
1979 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n"
1980 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n"
1981 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n"
1982 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n"
1983 "dot11RSNA4WayHandshakeFailures=%u\n",
1984 RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)),
1985 RSN_SUITE_ARG(wpa_cipher_suite(sm, sm->pairwise_cipher)),
1986 RSN_SUITE_ARG(wpa_cipher_suite(sm, sm->group_cipher)),
1987 pmkid_txt,
1988 RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)),
1989 RSN_SUITE_ARG(wpa_cipher_suite(sm, sm->pairwise_cipher)),
1990 RSN_SUITE_ARG(wpa_cipher_suite(sm, sm->group_cipher)),
1991 sm->dot11RSNA4WayHandshakeFailures);
1992 if (ret >= 0 && (size_t) ret < buflen)
1993 len += ret;
1994
1995 return (int) len;
1996 }
1997 #endif /* CONFIG_CTRL_IFACE */
1998
1999
wpa_sm_pmksa_free_cb(struct rsn_pmksa_cache_entry * entry,void * ctx,int replace)2000 static void wpa_sm_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry,
2001 void *ctx, int replace)
2002 {
2003 struct wpa_sm *sm = ctx;
2004
2005 if (sm->cur_pmksa == entry ||
2006 (sm->pmk_len == entry->pmk_len &&
2007 os_memcmp(sm->pmk, entry->pmk, sm->pmk_len) == 0)) {
2008 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
2009 "RSN: removed current PMKSA entry");
2010 sm->cur_pmksa = NULL;
2011
2012 if (replace) {
2013 /* A new entry is being added, so no need to
2014 * deauthenticate in this case. This happens when EAP
2015 * authentication is completed again (reauth or failed
2016 * PMKSA caching attempt). */
2017 return;
2018 }
2019
2020 os_memset(sm->pmk, 0, sizeof(sm->pmk));
2021 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED);
2022 }
2023 }
2024
2025
2026 /**
2027 * wpa_sm_init - Initialize WPA state machine
2028 * @ctx: Context pointer for callbacks; this needs to be an allocated buffer
2029 * Returns: Pointer to the allocated WPA state machine data
2030 *
2031 * This function is used to allocate a new WPA state machine and the returned
2032 * value is passed to all WPA state machine calls.
2033 */
wpa_sm_init(struct wpa_sm_ctx * ctx)2034 struct wpa_sm * wpa_sm_init(struct wpa_sm_ctx *ctx)
2035 {
2036 struct wpa_sm *sm;
2037
2038 sm = os_zalloc(sizeof(*sm));
2039 if (sm == NULL)
2040 return NULL;
2041 dl_list_init(&sm->pmksa_candidates);
2042 sm->renew_snonce = 1;
2043 sm->ctx = ctx;
2044
2045 sm->dot11RSNAConfigPMKLifetime = 43200;
2046 sm->dot11RSNAConfigPMKReauthThreshold = 70;
2047 sm->dot11RSNAConfigSATimeout = 60;
2048
2049 sm->pmksa = pmksa_cache_init(wpa_sm_pmksa_free_cb, sm, sm);
2050 if (sm->pmksa == NULL) {
2051 wpa_msg(sm->ctx->msg_ctx, MSG_ERROR,
2052 "RSN: PMKSA cache initialization failed");
2053 os_free(sm);
2054 return NULL;
2055 }
2056
2057 return sm;
2058 }
2059
2060
2061 /**
2062 * wpa_sm_deinit - Deinitialize WPA state machine
2063 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2064 */
wpa_sm_deinit(struct wpa_sm * sm)2065 void wpa_sm_deinit(struct wpa_sm *sm)
2066 {
2067 if (sm == NULL)
2068 return;
2069 pmksa_cache_deinit(sm->pmksa);
2070 eloop_cancel_timeout(wpa_sm_start_preauth, sm, NULL);
2071 eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL);
2072 os_free(sm->assoc_wpa_ie);
2073 os_free(sm->ap_wpa_ie);
2074 os_free(sm->ap_rsn_ie);
2075 os_free(sm->ctx);
2076 peerkey_deinit(sm);
2077 #ifdef CONFIG_IEEE80211R
2078 os_free(sm->assoc_resp_ies);
2079 #endif /* CONFIG_IEEE80211R */
2080 os_free(sm);
2081 }
2082
2083
2084 /**
2085 * wpa_sm_notify_assoc - Notify WPA state machine about association
2086 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2087 * @bssid: The BSSID of the new association
2088 *
2089 * This function is called to let WPA state machine know that the connection
2090 * was established.
2091 */
wpa_sm_notify_assoc(struct wpa_sm * sm,const u8 * bssid)2092 void wpa_sm_notify_assoc(struct wpa_sm *sm, const u8 *bssid)
2093 {
2094 int clear_ptk = 1;
2095
2096 if (sm == NULL)
2097 return;
2098
2099 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
2100 "WPA: Association event - clear replay counter");
2101 os_memcpy(sm->bssid, bssid, ETH_ALEN);
2102 os_memset(sm->rx_replay_counter, 0, WPA_REPLAY_COUNTER_LEN);
2103 sm->rx_replay_counter_set = 0;
2104 sm->renew_snonce = 1;
2105 if (os_memcmp(sm->preauth_bssid, bssid, ETH_ALEN) == 0)
2106 rsn_preauth_deinit(sm);
2107
2108 #ifdef CONFIG_IEEE80211R
2109 if (wpa_ft_is_completed(sm)) {
2110 /*
2111 * Clear portValid to kick EAPOL state machine to re-enter
2112 * AUTHENTICATED state to get the EAPOL port Authorized.
2113 */
2114 eapol_sm_notify_portValid(sm->eapol, FALSE);
2115 wpa_supplicant_key_neg_complete(sm, sm->bssid, 1);
2116
2117 /* Prepare for the next transition */
2118 wpa_ft_prepare_auth_request(sm, NULL);
2119
2120 clear_ptk = 0;
2121 }
2122 #endif /* CONFIG_IEEE80211R */
2123
2124 if (clear_ptk) {
2125 /*
2126 * IEEE 802.11, 8.4.10: Delete PTK SA on (re)association if
2127 * this is not part of a Fast BSS Transition.
2128 */
2129 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Clear old PTK");
2130 sm->ptk_set = 0;
2131 sm->tptk_set = 0;
2132 }
2133
2134 #ifdef CONFIG_TDLS
2135 wpa_tdls_assoc(sm);
2136 #endif /* CONFIG_TDLS */
2137 }
2138
2139
2140 /**
2141 * wpa_sm_notify_disassoc - Notify WPA state machine about disassociation
2142 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2143 *
2144 * This function is called to let WPA state machine know that the connection
2145 * was lost. This will abort any existing pre-authentication session.
2146 */
wpa_sm_notify_disassoc(struct wpa_sm * sm)2147 void wpa_sm_notify_disassoc(struct wpa_sm *sm)
2148 {
2149 rsn_preauth_deinit(sm);
2150 if (wpa_sm_get_state(sm) == WPA_4WAY_HANDSHAKE)
2151 sm->dot11RSNA4WayHandshakeFailures++;
2152 #ifdef CONFIG_TDLS
2153 wpa_tdls_disassoc(sm);
2154 #endif /* CONFIG_TDLS */
2155 }
2156
2157
2158 /**
2159 * wpa_sm_set_pmk - Set PMK
2160 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2161 * @pmk: The new PMK
2162 * @pmk_len: The length of the new PMK in bytes
2163 *
2164 * Configure the PMK for WPA state machine.
2165 */
wpa_sm_set_pmk(struct wpa_sm * sm,const u8 * pmk,size_t pmk_len)2166 void wpa_sm_set_pmk(struct wpa_sm *sm, const u8 *pmk, size_t pmk_len)
2167 {
2168 if (sm == NULL)
2169 return;
2170
2171 sm->pmk_len = pmk_len;
2172 os_memcpy(sm->pmk, pmk, pmk_len);
2173
2174 #ifdef CONFIG_IEEE80211R
2175 /* Set XXKey to be PSK for FT key derivation */
2176 sm->xxkey_len = pmk_len;
2177 os_memcpy(sm->xxkey, pmk, pmk_len);
2178 #endif /* CONFIG_IEEE80211R */
2179 }
2180
2181
2182 /**
2183 * wpa_sm_set_pmk_from_pmksa - Set PMK based on the current PMKSA
2184 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2185 *
2186 * Take the PMK from the current PMKSA into use. If no PMKSA is active, the PMK
2187 * will be cleared.
2188 */
wpa_sm_set_pmk_from_pmksa(struct wpa_sm * sm)2189 void wpa_sm_set_pmk_from_pmksa(struct wpa_sm *sm)
2190 {
2191 if (sm == NULL)
2192 return;
2193
2194 if (sm->cur_pmksa) {
2195 sm->pmk_len = sm->cur_pmksa->pmk_len;
2196 os_memcpy(sm->pmk, sm->cur_pmksa->pmk, sm->pmk_len);
2197 } else {
2198 sm->pmk_len = PMK_LEN;
2199 os_memset(sm->pmk, 0, PMK_LEN);
2200 }
2201 }
2202
2203
2204 /**
2205 * wpa_sm_set_fast_reauth - Set fast reauthentication (EAP) enabled/disabled
2206 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2207 * @fast_reauth: Whether fast reauthentication (EAP) is allowed
2208 */
wpa_sm_set_fast_reauth(struct wpa_sm * sm,int fast_reauth)2209 void wpa_sm_set_fast_reauth(struct wpa_sm *sm, int fast_reauth)
2210 {
2211 if (sm)
2212 sm->fast_reauth = fast_reauth;
2213 }
2214
2215
2216 /**
2217 * wpa_sm_set_scard_ctx - Set context pointer for smartcard callbacks
2218 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2219 * @scard_ctx: Context pointer for smartcard related callback functions
2220 */
wpa_sm_set_scard_ctx(struct wpa_sm * sm,void * scard_ctx)2221 void wpa_sm_set_scard_ctx(struct wpa_sm *sm, void *scard_ctx)
2222 {
2223 if (sm == NULL)
2224 return;
2225 sm->scard_ctx = scard_ctx;
2226 if (sm->preauth_eapol)
2227 eapol_sm_register_scard_ctx(sm->preauth_eapol, scard_ctx);
2228 }
2229
2230
2231 /**
2232 * wpa_sm_set_config - Notification of current configration change
2233 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2234 * @config: Pointer to current network configuration
2235 *
2236 * Notify WPA state machine that configuration has changed. config will be
2237 * stored as a backpointer to network configuration. This can be %NULL to clear
2238 * the stored pointed.
2239 */
wpa_sm_set_config(struct wpa_sm * sm,struct rsn_supp_config * config)2240 void wpa_sm_set_config(struct wpa_sm *sm, struct rsn_supp_config *config)
2241 {
2242 if (!sm)
2243 return;
2244
2245 if (config) {
2246 sm->network_ctx = config->network_ctx;
2247 sm->peerkey_enabled = config->peerkey_enabled;
2248 sm->allowed_pairwise_cipher = config->allowed_pairwise_cipher;
2249 sm->proactive_key_caching = config->proactive_key_caching;
2250 sm->eap_workaround = config->eap_workaround;
2251 sm->eap_conf_ctx = config->eap_conf_ctx;
2252 if (config->ssid) {
2253 os_memcpy(sm->ssid, config->ssid, config->ssid_len);
2254 sm->ssid_len = config->ssid_len;
2255 } else
2256 sm->ssid_len = 0;
2257 sm->wpa_ptk_rekey = config->wpa_ptk_rekey;
2258 } else {
2259 sm->network_ctx = NULL;
2260 sm->peerkey_enabled = 0;
2261 sm->allowed_pairwise_cipher = 0;
2262 sm->proactive_key_caching = 0;
2263 sm->eap_workaround = 0;
2264 sm->eap_conf_ctx = NULL;
2265 sm->ssid_len = 0;
2266 sm->wpa_ptk_rekey = 0;
2267 }
2268 if (config == NULL || config->network_ctx != sm->network_ctx)
2269 pmksa_cache_notify_reconfig(sm->pmksa);
2270 }
2271
2272
2273 /**
2274 * wpa_sm_set_own_addr - Set own MAC address
2275 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2276 * @addr: Own MAC address
2277 */
wpa_sm_set_own_addr(struct wpa_sm * sm,const u8 * addr)2278 void wpa_sm_set_own_addr(struct wpa_sm *sm, const u8 *addr)
2279 {
2280 if (sm)
2281 os_memcpy(sm->own_addr, addr, ETH_ALEN);
2282 }
2283
2284
2285 /**
2286 * wpa_sm_set_ifname - Set network interface name
2287 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2288 * @ifname: Interface name
2289 * @bridge_ifname: Optional bridge interface name (for pre-auth)
2290 */
wpa_sm_set_ifname(struct wpa_sm * sm,const char * ifname,const char * bridge_ifname)2291 void wpa_sm_set_ifname(struct wpa_sm *sm, const char *ifname,
2292 const char *bridge_ifname)
2293 {
2294 if (sm) {
2295 sm->ifname = ifname;
2296 sm->bridge_ifname = bridge_ifname;
2297 }
2298 }
2299
2300
2301 /**
2302 * wpa_sm_set_eapol - Set EAPOL state machine pointer
2303 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2304 * @eapol: Pointer to EAPOL state machine allocated with eapol_sm_init()
2305 */
wpa_sm_set_eapol(struct wpa_sm * sm,struct eapol_sm * eapol)2306 void wpa_sm_set_eapol(struct wpa_sm *sm, struct eapol_sm *eapol)
2307 {
2308 if (sm)
2309 sm->eapol = eapol;
2310 }
2311
2312
2313 /**
2314 * wpa_sm_set_param - Set WPA state machine parameters
2315 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2316 * @param: Parameter field
2317 * @value: Parameter value
2318 * Returns: 0 on success, -1 on failure
2319 */
wpa_sm_set_param(struct wpa_sm * sm,enum wpa_sm_conf_params param,unsigned int value)2320 int wpa_sm_set_param(struct wpa_sm *sm, enum wpa_sm_conf_params param,
2321 unsigned int value)
2322 {
2323 int ret = 0;
2324
2325 if (sm == NULL)
2326 return -1;
2327
2328 switch (param) {
2329 case RSNA_PMK_LIFETIME:
2330 if (value > 0)
2331 sm->dot11RSNAConfigPMKLifetime = value;
2332 else
2333 ret = -1;
2334 break;
2335 case RSNA_PMK_REAUTH_THRESHOLD:
2336 if (value > 0 && value <= 100)
2337 sm->dot11RSNAConfigPMKReauthThreshold = value;
2338 else
2339 ret = -1;
2340 break;
2341 case RSNA_SA_TIMEOUT:
2342 if (value > 0)
2343 sm->dot11RSNAConfigSATimeout = value;
2344 else
2345 ret = -1;
2346 break;
2347 case WPA_PARAM_PROTO:
2348 sm->proto = value;
2349 break;
2350 case WPA_PARAM_PAIRWISE:
2351 sm->pairwise_cipher = value;
2352 break;
2353 case WPA_PARAM_GROUP:
2354 sm->group_cipher = value;
2355 break;
2356 case WPA_PARAM_KEY_MGMT:
2357 sm->key_mgmt = value;
2358 break;
2359 #ifdef CONFIG_IEEE80211W
2360 case WPA_PARAM_MGMT_GROUP:
2361 sm->mgmt_group_cipher = value;
2362 break;
2363 #endif /* CONFIG_IEEE80211W */
2364 case WPA_PARAM_RSN_ENABLED:
2365 sm->rsn_enabled = value;
2366 break;
2367 case WPA_PARAM_MFP:
2368 sm->mfp = value;
2369 break;
2370 default:
2371 break;
2372 }
2373
2374 return ret;
2375 }
2376
2377
2378 /**
2379 * wpa_sm_get_param - Get WPA state machine parameters
2380 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2381 * @param: Parameter field
2382 * Returns: Parameter value
2383 */
wpa_sm_get_param(struct wpa_sm * sm,enum wpa_sm_conf_params param)2384 unsigned int wpa_sm_get_param(struct wpa_sm *sm, enum wpa_sm_conf_params param)
2385 {
2386 if (sm == NULL)
2387 return 0;
2388
2389 switch (param) {
2390 case RSNA_PMK_LIFETIME:
2391 return sm->dot11RSNAConfigPMKLifetime;
2392 case RSNA_PMK_REAUTH_THRESHOLD:
2393 return sm->dot11RSNAConfigPMKReauthThreshold;
2394 case RSNA_SA_TIMEOUT:
2395 return sm->dot11RSNAConfigSATimeout;
2396 case WPA_PARAM_PROTO:
2397 return sm->proto;
2398 case WPA_PARAM_PAIRWISE:
2399 return sm->pairwise_cipher;
2400 case WPA_PARAM_GROUP:
2401 return sm->group_cipher;
2402 case WPA_PARAM_KEY_MGMT:
2403 return sm->key_mgmt;
2404 #ifdef CONFIG_IEEE80211W
2405 case WPA_PARAM_MGMT_GROUP:
2406 return sm->mgmt_group_cipher;
2407 #endif /* CONFIG_IEEE80211W */
2408 case WPA_PARAM_RSN_ENABLED:
2409 return sm->rsn_enabled;
2410 default:
2411 return 0;
2412 }
2413 }
2414
2415
2416 /**
2417 * wpa_sm_get_status - Get WPA state machine
2418 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2419 * @buf: Buffer for status information
2420 * @buflen: Maximum buffer length
2421 * @verbose: Whether to include verbose status information
2422 * Returns: Number of bytes written to buf.
2423 *
2424 * Query WPA state machine for status information. This function fills in
2425 * a text area with current status information. If the buffer (buf) is not
2426 * large enough, status information will be truncated to fit the buffer.
2427 */
wpa_sm_get_status(struct wpa_sm * sm,char * buf,size_t buflen,int verbose)2428 int wpa_sm_get_status(struct wpa_sm *sm, char *buf, size_t buflen,
2429 int verbose)
2430 {
2431 char *pos = buf, *end = buf + buflen;
2432 int ret;
2433
2434 ret = os_snprintf(pos, end - pos,
2435 "pairwise_cipher=%s\n"
2436 "group_cipher=%s\n"
2437 "key_mgmt=%s\n",
2438 wpa_cipher_txt(sm->pairwise_cipher),
2439 wpa_cipher_txt(sm->group_cipher),
2440 wpa_key_mgmt_txt(sm->key_mgmt, sm->proto));
2441 if (ret < 0 || ret >= end - pos)
2442 return pos - buf;
2443 pos += ret;
2444 return pos - buf;
2445 }
2446
2447
2448 /**
2449 * wpa_sm_set_assoc_wpa_ie_default - Generate own WPA/RSN IE from configuration
2450 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2451 * @wpa_ie: Pointer to buffer for WPA/RSN IE
2452 * @wpa_ie_len: Pointer to the length of the wpa_ie buffer
2453 * Returns: 0 on success, -1 on failure
2454 */
wpa_sm_set_assoc_wpa_ie_default(struct wpa_sm * sm,u8 * wpa_ie,size_t * wpa_ie_len)2455 int wpa_sm_set_assoc_wpa_ie_default(struct wpa_sm *sm, u8 *wpa_ie,
2456 size_t *wpa_ie_len)
2457 {
2458 int res;
2459
2460 if (sm == NULL)
2461 return -1;
2462
2463 res = wpa_gen_wpa_ie(sm, wpa_ie, *wpa_ie_len);
2464 if (res < 0)
2465 return -1;
2466 *wpa_ie_len = res;
2467
2468 wpa_hexdump(MSG_DEBUG, "WPA: Set own WPA IE default",
2469 wpa_ie, *wpa_ie_len);
2470
2471 if (sm->assoc_wpa_ie == NULL) {
2472 /*
2473 * Make a copy of the WPA/RSN IE so that 4-Way Handshake gets
2474 * the correct version of the IE even if PMKSA caching is
2475 * aborted (which would remove PMKID from IE generation).
2476 */
2477 sm->assoc_wpa_ie = os_malloc(*wpa_ie_len);
2478 if (sm->assoc_wpa_ie == NULL)
2479 return -1;
2480
2481 os_memcpy(sm->assoc_wpa_ie, wpa_ie, *wpa_ie_len);
2482 sm->assoc_wpa_ie_len = *wpa_ie_len;
2483 }
2484
2485 return 0;
2486 }
2487
2488
2489 /**
2490 * wpa_sm_set_assoc_wpa_ie - Set own WPA/RSN IE from (Re)AssocReq
2491 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2492 * @ie: Pointer to IE data (starting from id)
2493 * @len: IE length
2494 * Returns: 0 on success, -1 on failure
2495 *
2496 * Inform WPA state machine about the WPA/RSN IE used in (Re)Association
2497 * Request frame. The IE will be used to override the default value generated
2498 * with wpa_sm_set_assoc_wpa_ie_default().
2499 */
wpa_sm_set_assoc_wpa_ie(struct wpa_sm * sm,const u8 * ie,size_t len)2500 int wpa_sm_set_assoc_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len)
2501 {
2502 if (sm == NULL)
2503 return -1;
2504
2505 os_free(sm->assoc_wpa_ie);
2506 if (ie == NULL || len == 0) {
2507 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
2508 "WPA: clearing own WPA/RSN IE");
2509 sm->assoc_wpa_ie = NULL;
2510 sm->assoc_wpa_ie_len = 0;
2511 } else {
2512 wpa_hexdump(MSG_DEBUG, "WPA: set own WPA/RSN IE", ie, len);
2513 sm->assoc_wpa_ie = os_malloc(len);
2514 if (sm->assoc_wpa_ie == NULL)
2515 return -1;
2516
2517 os_memcpy(sm->assoc_wpa_ie, ie, len);
2518 sm->assoc_wpa_ie_len = len;
2519 }
2520
2521 return 0;
2522 }
2523
2524
2525 /**
2526 * wpa_sm_set_ap_wpa_ie - Set AP WPA IE from Beacon/ProbeResp
2527 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2528 * @ie: Pointer to IE data (starting from id)
2529 * @len: IE length
2530 * Returns: 0 on success, -1 on failure
2531 *
2532 * Inform WPA state machine about the WPA IE used in Beacon / Probe Response
2533 * frame.
2534 */
wpa_sm_set_ap_wpa_ie(struct wpa_sm * sm,const u8 * ie,size_t len)2535 int wpa_sm_set_ap_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len)
2536 {
2537 if (sm == NULL)
2538 return -1;
2539
2540 os_free(sm->ap_wpa_ie);
2541 if (ie == NULL || len == 0) {
2542 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
2543 "WPA: clearing AP WPA IE");
2544 sm->ap_wpa_ie = NULL;
2545 sm->ap_wpa_ie_len = 0;
2546 } else {
2547 wpa_hexdump(MSG_DEBUG, "WPA: set AP WPA IE", ie, len);
2548 sm->ap_wpa_ie = os_malloc(len);
2549 if (sm->ap_wpa_ie == NULL)
2550 return -1;
2551
2552 os_memcpy(sm->ap_wpa_ie, ie, len);
2553 sm->ap_wpa_ie_len = len;
2554 }
2555
2556 return 0;
2557 }
2558
2559
2560 /**
2561 * wpa_sm_set_ap_rsn_ie - Set AP RSN IE from Beacon/ProbeResp
2562 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2563 * @ie: Pointer to IE data (starting from id)
2564 * @len: IE length
2565 * Returns: 0 on success, -1 on failure
2566 *
2567 * Inform WPA state machine about the RSN IE used in Beacon / Probe Response
2568 * frame.
2569 */
wpa_sm_set_ap_rsn_ie(struct wpa_sm * sm,const u8 * ie,size_t len)2570 int wpa_sm_set_ap_rsn_ie(struct wpa_sm *sm, const u8 *ie, size_t len)
2571 {
2572 if (sm == NULL)
2573 return -1;
2574
2575 os_free(sm->ap_rsn_ie);
2576 if (ie == NULL || len == 0) {
2577 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
2578 "WPA: clearing AP RSN IE");
2579 sm->ap_rsn_ie = NULL;
2580 sm->ap_rsn_ie_len = 0;
2581 } else {
2582 wpa_hexdump(MSG_DEBUG, "WPA: set AP RSN IE", ie, len);
2583 sm->ap_rsn_ie = os_malloc(len);
2584 if (sm->ap_rsn_ie == NULL)
2585 return -1;
2586
2587 os_memcpy(sm->ap_rsn_ie, ie, len);
2588 sm->ap_rsn_ie_len = len;
2589 }
2590
2591 return 0;
2592 }
2593
2594
2595 /**
2596 * wpa_sm_parse_own_wpa_ie - Parse own WPA/RSN IE
2597 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2598 * @data: Pointer to data area for parsing results
2599 * Returns: 0 on success, -1 if IE is not known, or -2 on parsing failure
2600 *
2601 * Parse the contents of the own WPA or RSN IE from (Re)AssocReq and write the
2602 * parsed data into data.
2603 */
wpa_sm_parse_own_wpa_ie(struct wpa_sm * sm,struct wpa_ie_data * data)2604 int wpa_sm_parse_own_wpa_ie(struct wpa_sm *sm, struct wpa_ie_data *data)
2605 {
2606 if (sm == NULL)
2607 return -1;
2608
2609 if (sm->assoc_wpa_ie == NULL) {
2610 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
2611 "WPA: No WPA/RSN IE available from association info");
2612 return -1;
2613 }
2614 if (wpa_parse_wpa_ie(sm->assoc_wpa_ie, sm->assoc_wpa_ie_len, data))
2615 return -2;
2616 return 0;
2617 }
2618
2619
wpa_sm_pmksa_cache_list(struct wpa_sm * sm,char * buf,size_t len)2620 int wpa_sm_pmksa_cache_list(struct wpa_sm *sm, char *buf, size_t len)
2621 {
2622 #ifndef CONFIG_NO_WPA2
2623 return pmksa_cache_list(sm->pmksa, buf, len);
2624 #else /* CONFIG_NO_WPA2 */
2625 return -1;
2626 #endif /* CONFIG_NO_WPA2 */
2627 }
2628
2629
wpa_sm_drop_sa(struct wpa_sm * sm)2630 void wpa_sm_drop_sa(struct wpa_sm *sm)
2631 {
2632 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Clear old PMK and PTK");
2633 sm->ptk_set = 0;
2634 sm->tptk_set = 0;
2635 os_memset(sm->pmk, 0, sizeof(sm->pmk));
2636 os_memset(&sm->ptk, 0, sizeof(sm->ptk));
2637 os_memset(&sm->tptk, 0, sizeof(sm->tptk));
2638 }
2639
2640
wpa_sm_has_ptk(struct wpa_sm * sm)2641 int wpa_sm_has_ptk(struct wpa_sm *sm)
2642 {
2643 if (sm == NULL)
2644 return 0;
2645 return sm->ptk_set;
2646 }
2647