blob: 292255c18c6adfbbe612d4b4e888304e4725fff5 [file] [log] [blame]
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -07001/*
2 * WPA Supplicant - WPA state machine and EAPOL-Key processing
Dmitry Shmidtc5ec7f52012-03-06 16:33:24 -08003 * Copyright (c) 2003-2012, Jouni Malinen <j@w1.fi>
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -07004 *
Dmitry Shmidtc5ec7f52012-03-06 16:33:24 -08005 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -07007 */
8
9#include "includes.h"
10
11#include "common.h"
12#include "crypto/aes_wrap.h"
13#include "crypto/crypto.h"
14#include "crypto/random.h"
15#include "common/ieee802_11_defs.h"
16#include "eapol_supp/eapol_supp_sm.h"
17#include "wpa.h"
18#include "eloop.h"
19#include "preauth.h"
20#include "pmksa_cache.h"
21#include "wpa_i.h"
22#include "wpa_ie.h"
23#include "peerkey.h"
24
25
26/**
27 * wpa_eapol_key_send - Send WPA/RSN EAPOL-Key message
28 * @sm: Pointer to WPA state machine data from wpa_sm_init()
29 * @kck: Key Confirmation Key (KCK, part of PTK)
30 * @ver: Version field from Key Info
31 * @dest: Destination address for the frame
32 * @proto: Ethertype (usually ETH_P_EAPOL)
33 * @msg: EAPOL-Key message
34 * @msg_len: Length of message
35 * @key_mic: Pointer to the buffer to which the EAPOL-Key MIC is written
36 */
37void wpa_eapol_key_send(struct wpa_sm *sm, const u8 *kck,
38 int ver, const u8 *dest, u16 proto,
39 u8 *msg, size_t msg_len, u8 *key_mic)
40{
41 if (is_zero_ether_addr(dest) && is_zero_ether_addr(sm->bssid)) {
42 /*
43 * Association event was not yet received; try to fetch
44 * BSSID from the driver.
45 */
46 if (wpa_sm_get_bssid(sm, sm->bssid) < 0) {
47 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
48 "WPA: Failed to read BSSID for "
49 "EAPOL-Key destination address");
50 } else {
51 dest = sm->bssid;
52 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
53 "WPA: Use BSSID (" MACSTR
54 ") as the destination for EAPOL-Key",
55 MAC2STR(dest));
56 }
57 }
58 if (key_mic &&
59 wpa_eapol_key_mic(kck, ver, msg, msg_len, key_mic)) {
60 wpa_msg(sm->ctx->msg_ctx, MSG_ERROR,
61 "WPA: Failed to generate EAPOL-Key "
62 "version %d MIC", ver);
63 goto out;
64 }
65 wpa_hexdump_key(MSG_DEBUG, "WPA: KCK", kck, 16);
66 wpa_hexdump(MSG_DEBUG, "WPA: Derived Key MIC", key_mic, 16);
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);
70out:
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 */
85void 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;
Dmitry Shmidt61d9df32012-08-29 16:22:06 -070094 else if (sm->pairwise_cipher != WPA_CIPHER_TKIP)
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -070095 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_msg(sm->ctx->msg_ctx, MSG_WARNING,
101 "Failed to read BSSID for EAPOL-Key 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_msg(sm->ctx->msg_ctx, MSG_INFO,
128 "WPA: Sending EAPOL-Key Request (error=%d "
129 "pairwise=%d ptk_set=%d len=%lu)",
130 error, pairwise, sm->ptk_set, (unsigned long) rlen);
131 wpa_eapol_key_send(sm, sm->ptk.kck, ver, bssid, ETH_P_EAPOL,
132 rbuf, rlen, key_info & WPA_KEY_INFO_MIC ?
133 reply->key_mic : NULL);
134}
135
136
137static int wpa_supplicant_get_pmk(struct wpa_sm *sm,
138 const unsigned char *src_addr,
139 const u8 *pmkid)
140{
141 int abort_cached = 0;
142
143 if (pmkid && !sm->cur_pmksa) {
144 /* When using drivers that generate RSN IE, wpa_supplicant may
145 * not have enough time to get the association information
146 * event before receiving this 1/4 message, so try to find a
147 * matching PMKSA cache entry here. */
Dmitry Shmidtc5ec7f52012-03-06 16:33:24 -0800148 sm->cur_pmksa = pmksa_cache_get(sm->pmksa, src_addr, pmkid,
149 NULL);
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700150 if (sm->cur_pmksa) {
151 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
152 "RSN: found matching PMKID from PMKSA cache");
153 } else {
154 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
155 "RSN: no matching PMKID found");
156 abort_cached = 1;
157 }
158 }
159
160 if (pmkid && sm->cur_pmksa &&
161 os_memcmp(pmkid, sm->cur_pmksa->pmkid, PMKID_LEN) == 0) {
162 wpa_hexdump(MSG_DEBUG, "RSN: matched PMKID", pmkid, PMKID_LEN);
163 wpa_sm_set_pmk_from_pmksa(sm);
164 wpa_hexdump_key(MSG_DEBUG, "RSN: PMK from PMKSA cache",
165 sm->pmk, sm->pmk_len);
166 eapol_sm_notify_cached(sm->eapol);
167#ifdef CONFIG_IEEE80211R
168 sm->xxkey_len = 0;
169#endif /* CONFIG_IEEE80211R */
170 } else if (wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt) && sm->eapol) {
171 int res, pmk_len;
172 pmk_len = PMK_LEN;
173 res = eapol_sm_get_key(sm->eapol, sm->pmk, PMK_LEN);
174 if (res) {
175 /*
176 * EAP-LEAP is an exception from other EAP methods: it
177 * uses only 16-byte PMK.
178 */
179 res = eapol_sm_get_key(sm->eapol, sm->pmk, 16);
180 pmk_len = 16;
181 } else {
182#ifdef CONFIG_IEEE80211R
183 u8 buf[2 * PMK_LEN];
184 if (eapol_sm_get_key(sm->eapol, buf, 2 * PMK_LEN) == 0)
185 {
186 os_memcpy(sm->xxkey, buf + PMK_LEN, PMK_LEN);
187 sm->xxkey_len = PMK_LEN;
188 os_memset(buf, 0, sizeof(buf));
189 }
190#endif /* CONFIG_IEEE80211R */
191 }
192 if (res == 0) {
Dmitry Shmidt61d9df32012-08-29 16:22:06 -0700193 struct rsn_pmksa_cache_entry *sa = NULL;
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700194 wpa_hexdump_key(MSG_DEBUG, "WPA: PMK from EAPOL state "
195 "machines", sm->pmk, pmk_len);
196 sm->pmk_len = pmk_len;
Dmitry Shmidtc55524a2011-07-07 11:18:38 -0700197 if (sm->proto == WPA_PROTO_RSN &&
198 !wpa_key_mgmt_ft(sm->key_mgmt)) {
Dmitry Shmidt61d9df32012-08-29 16:22:06 -0700199 sa = pmksa_cache_add(sm->pmksa,
200 sm->pmk, pmk_len,
201 src_addr, sm->own_addr,
202 sm->network_ctx,
203 sm->key_mgmt);
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700204 }
205 if (!sm->cur_pmksa && pmkid &&
Dmitry Shmidtc5ec7f52012-03-06 16:33:24 -0800206 pmksa_cache_get(sm->pmksa, src_addr, pmkid, NULL))
207 {
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700208 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
209 "RSN: the new PMK matches with the "
210 "PMKID");
211 abort_cached = 0;
212 }
Dmitry Shmidt61d9df32012-08-29 16:22:06 -0700213
214 if (!sm->cur_pmksa)
215 sm->cur_pmksa = sa;
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700216 } else {
217 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
218 "WPA: Failed to get master session key from "
219 "EAPOL state machines - key handshake "
220 "aborted");
221 if (sm->cur_pmksa) {
222 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
223 "RSN: Cancelled PMKSA caching "
224 "attempt");
225 sm->cur_pmksa = NULL;
226 abort_cached = 1;
227 } else if (!abort_cached) {
228 return -1;
229 }
230 }
231 }
232
Dmitry Shmidtc55524a2011-07-07 11:18:38 -0700233 if (abort_cached && wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt) &&
234 !wpa_key_mgmt_ft(sm->key_mgmt)) {
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700235 /* Send EAPOL-Start to trigger full EAP authentication. */
236 u8 *buf;
237 size_t buflen;
238
239 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
240 "RSN: no PMKSA entry found - trigger "
241 "full EAP authentication");
242 buf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_START,
243 NULL, 0, &buflen, NULL);
244 if (buf) {
245 wpa_sm_ether_send(sm, sm->bssid, ETH_P_EAPOL,
246 buf, buflen);
247 os_free(buf);
248 return -2;
249 }
250
251 return -1;
252 }
253
254 return 0;
255}
256
257
258/**
259 * wpa_supplicant_send_2_of_4 - Send message 2 of WPA/RSN 4-Way Handshake
260 * @sm: Pointer to WPA state machine data from wpa_sm_init()
261 * @dst: Destination address for the frame
262 * @key: Pointer to the EAPOL-Key frame header
263 * @ver: Version bits from EAPOL-Key Key Info
264 * @nonce: Nonce value for the EAPOL-Key frame
265 * @wpa_ie: WPA/RSN IE
266 * @wpa_ie_len: Length of the WPA/RSN IE
267 * @ptk: PTK to use for keyed hash and encryption
268 * Returns: 0 on success, -1 on failure
269 */
270int wpa_supplicant_send_2_of_4(struct wpa_sm *sm, const unsigned char *dst,
271 const struct wpa_eapol_key *key,
272 int ver, const u8 *nonce,
273 const u8 *wpa_ie, size_t wpa_ie_len,
274 struct wpa_ptk *ptk)
275{
276 size_t rlen;
277 struct wpa_eapol_key *reply;
278 u8 *rbuf;
279 u8 *rsn_ie_buf = NULL;
280
281 if (wpa_ie == NULL) {
282 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: No wpa_ie set - "
283 "cannot generate msg 2/4");
284 return -1;
285 }
286
287#ifdef CONFIG_IEEE80211R
288 if (wpa_key_mgmt_ft(sm->key_mgmt)) {
289 int res;
290
291 /*
292 * Add PMKR1Name into RSN IE (PMKID-List) and add MDIE and
293 * FTIE from (Re)Association Response.
294 */
295 rsn_ie_buf = os_malloc(wpa_ie_len + 2 + 2 + PMKID_LEN +
296 sm->assoc_resp_ies_len);
297 if (rsn_ie_buf == NULL)
298 return -1;
299 os_memcpy(rsn_ie_buf, wpa_ie, wpa_ie_len);
300 res = wpa_insert_pmkid(rsn_ie_buf, wpa_ie_len,
301 sm->pmk_r1_name);
302 if (res < 0) {
303 os_free(rsn_ie_buf);
304 return -1;
305 }
306 wpa_ie_len += res;
307
308 if (sm->assoc_resp_ies) {
309 os_memcpy(rsn_ie_buf + wpa_ie_len, sm->assoc_resp_ies,
310 sm->assoc_resp_ies_len);
311 wpa_ie_len += sm->assoc_resp_ies_len;
312 }
313
314 wpa_ie = rsn_ie_buf;
315 }
316#endif /* CONFIG_IEEE80211R */
317
318 wpa_hexdump(MSG_DEBUG, "WPA: WPA IE for msg 2/4", wpa_ie, wpa_ie_len);
319
320 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY,
321 NULL, sizeof(*reply) + wpa_ie_len,
322 &rlen, (void *) &reply);
323 if (rbuf == NULL) {
324 os_free(rsn_ie_buf);
325 return -1;
326 }
327
328 reply->type = sm->proto == WPA_PROTO_RSN ?
329 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
330 WPA_PUT_BE16(reply->key_info,
331 ver | WPA_KEY_INFO_KEY_TYPE | WPA_KEY_INFO_MIC);
332 if (sm->proto == WPA_PROTO_RSN)
333 WPA_PUT_BE16(reply->key_length, 0);
334 else
335 os_memcpy(reply->key_length, key->key_length, 2);
336 os_memcpy(reply->replay_counter, key->replay_counter,
337 WPA_REPLAY_COUNTER_LEN);
338 wpa_hexdump(MSG_DEBUG, "WPA: Replay Counter", reply->replay_counter,
339 WPA_REPLAY_COUNTER_LEN);
340
341 WPA_PUT_BE16(reply->key_data_length, wpa_ie_len);
342 os_memcpy(reply + 1, wpa_ie, wpa_ie_len);
343 os_free(rsn_ie_buf);
344
345 os_memcpy(reply->key_nonce, nonce, WPA_NONCE_LEN);
346
347 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 2/4");
348 wpa_eapol_key_send(sm, ptk->kck, ver, dst, ETH_P_EAPOL,
349 rbuf, rlen, reply->key_mic);
350
351 return 0;
352}
353
354
355static int wpa_derive_ptk(struct wpa_sm *sm, const unsigned char *src_addr,
356 const struct wpa_eapol_key *key,
357 struct wpa_ptk *ptk)
358{
Dmitry Shmidt61d9df32012-08-29 16:22:06 -0700359 size_t ptk_len = sm->pairwise_cipher != WPA_CIPHER_TKIP ? 48 : 64;
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700360#ifdef CONFIG_IEEE80211R
361 if (wpa_key_mgmt_ft(sm->key_mgmt))
362 return wpa_derive_ptk_ft(sm, src_addr, key, ptk, ptk_len);
363#endif /* CONFIG_IEEE80211R */
364
365 wpa_pmk_to_ptk(sm->pmk, sm->pmk_len, "Pairwise key expansion",
366 sm->own_addr, sm->bssid, sm->snonce, key->key_nonce,
367 (u8 *) ptk, ptk_len,
368 wpa_key_mgmt_sha256(sm->key_mgmt));
369 return 0;
370}
371
372
373static void wpa_supplicant_process_1_of_4(struct wpa_sm *sm,
374 const unsigned char *src_addr,
375 const struct wpa_eapol_key *key,
376 u16 ver)
377{
378 struct wpa_eapol_ie_parse ie;
379 struct wpa_ptk *ptk;
380 u8 buf[8];
381 int res;
382
383 if (wpa_sm_get_network_ctx(sm) == NULL) {
384 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: No SSID info "
385 "found (msg 1 of 4)");
386 return;
387 }
388
389 wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE);
390 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 1 of 4-Way "
391 "Handshake from " MACSTR " (ver=%d)", MAC2STR(src_addr), ver);
392
393 os_memset(&ie, 0, sizeof(ie));
394
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700395 if (sm->proto == WPA_PROTO_RSN) {
396 /* RSN: msg 1/4 should contain PMKID for the selected PMK */
397 const u8 *_buf = (const u8 *) (key + 1);
398 size_t len = WPA_GET_BE16(key->key_data_length);
399 wpa_hexdump(MSG_DEBUG, "RSN: msg 1/4 key data", _buf, len);
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800400 if (wpa_supplicant_parse_ies(_buf, len, &ie) < 0)
401 goto failed;
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700402 if (ie.pmkid) {
403 wpa_hexdump(MSG_DEBUG, "RSN: PMKID from "
404 "Authenticator", ie.pmkid, PMKID_LEN);
405 }
406 }
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700407
408 res = wpa_supplicant_get_pmk(sm, src_addr, ie.pmkid);
409 if (res == -2) {
410 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "RSN: Do not reply to "
411 "msg 1/4 - requesting full EAP authentication");
412 return;
413 }
414 if (res)
415 goto failed;
416
417 if (sm->renew_snonce) {
418 if (random_get_bytes(sm->snonce, WPA_NONCE_LEN)) {
419 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
420 "WPA: Failed to get random data for SNonce");
421 goto failed;
422 }
423 sm->renew_snonce = 0;
424 wpa_hexdump(MSG_DEBUG, "WPA: Renewed SNonce",
425 sm->snonce, WPA_NONCE_LEN);
426 }
427
428 /* Calculate PTK which will be stored as a temporary PTK until it has
429 * been verified when processing message 3/4. */
430 ptk = &sm->tptk;
431 wpa_derive_ptk(sm, src_addr, key, ptk);
432 /* Supplicant: swap tx/rx Mic keys */
433 os_memcpy(buf, ptk->u.auth.tx_mic_key, 8);
434 os_memcpy(ptk->u.auth.tx_mic_key, ptk->u.auth.rx_mic_key, 8);
435 os_memcpy(ptk->u.auth.rx_mic_key, buf, 8);
436 sm->tptk_set = 1;
437
438 if (wpa_supplicant_send_2_of_4(sm, sm->bssid, key, ver, sm->snonce,
439 sm->assoc_wpa_ie, sm->assoc_wpa_ie_len,
440 ptk))
441 goto failed;
442
443 os_memcpy(sm->anonce, key->key_nonce, WPA_NONCE_LEN);
444 return;
445
446failed:
447 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED);
448}
449
450
451static void wpa_sm_start_preauth(void *eloop_ctx, void *timeout_ctx)
452{
453 struct wpa_sm *sm = eloop_ctx;
454 rsn_preauth_candidate_process(sm);
455}
456
457
458static void wpa_supplicant_key_neg_complete(struct wpa_sm *sm,
459 const u8 *addr, int secure)
460{
461 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
462 "WPA: Key negotiation completed with "
463 MACSTR " [PTK=%s GTK=%s]", MAC2STR(addr),
464 wpa_cipher_txt(sm->pairwise_cipher),
465 wpa_cipher_txt(sm->group_cipher));
466 wpa_sm_cancel_auth_timeout(sm);
467 wpa_sm_set_state(sm, WPA_COMPLETED);
468
469 if (secure) {
470 wpa_sm_mlme_setprotection(
471 sm, addr, MLME_SETPROTECTION_PROTECT_TYPE_RX_TX,
472 MLME_SETPROTECTION_KEY_TYPE_PAIRWISE);
473 eapol_sm_notify_portValid(sm->eapol, TRUE);
474 if (wpa_key_mgmt_wpa_psk(sm->key_mgmt))
475 eapol_sm_notify_eap_success(sm->eapol, TRUE);
476 /*
477 * Start preauthentication after a short wait to avoid a
478 * possible race condition between the data receive and key
479 * configuration after the 4-Way Handshake. This increases the
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -0800480 * likelihood of the first preauth EAPOL-Start frame getting to
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700481 * the target AP.
482 */
483 eloop_register_timeout(1, 0, wpa_sm_start_preauth, sm, NULL);
484 }
485
486 if (sm->cur_pmksa && sm->cur_pmksa->opportunistic) {
487 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
488 "RSN: Authenticator accepted "
489 "opportunistic PMKSA entry - marking it valid");
490 sm->cur_pmksa->opportunistic = 0;
491 }
492
493#ifdef CONFIG_IEEE80211R
494 if (wpa_key_mgmt_ft(sm->key_mgmt)) {
495 /* Prepare for the next transition */
496 wpa_ft_prepare_auth_request(sm, NULL);
497 }
498#endif /* CONFIG_IEEE80211R */
499}
500
501
502static void wpa_sm_rekey_ptk(void *eloop_ctx, void *timeout_ctx)
503{
504 struct wpa_sm *sm = eloop_ctx;
505 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Request PTK rekeying");
506 wpa_sm_key_request(sm, 0, 1);
507}
508
509
510static int wpa_supplicant_install_ptk(struct wpa_sm *sm,
511 const struct wpa_eapol_key *key)
512{
513 int keylen, rsclen;
514 enum wpa_alg alg;
515 const u8 *key_rsc;
516 u8 null_rsc[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
517
518 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
519 "WPA: Installing PTK to the driver");
520
Dmitry Shmidt4530cfd2012-09-09 15:20:40 -0700521 if (sm->pairwise_cipher == WPA_CIPHER_NONE) {
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700522 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Pairwise Cipher "
523 "Suite: NONE - do not use pairwise keys");
524 return 0;
Dmitry Shmidt4530cfd2012-09-09 15:20:40 -0700525 }
526
527 if (!wpa_cipher_valid_pairwise(sm->pairwise_cipher)) {
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700528 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
529 "WPA: Unsupported pairwise cipher %d",
530 sm->pairwise_cipher);
531 return -1;
532 }
533
Dmitry Shmidt4530cfd2012-09-09 15:20:40 -0700534 alg = wpa_cipher_to_alg(sm->pairwise_cipher);
535 keylen = wpa_cipher_key_len(sm->pairwise_cipher);
536 rsclen = wpa_cipher_rsc_len(sm->pairwise_cipher);
537
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700538 if (sm->proto == WPA_PROTO_RSN) {
539 key_rsc = null_rsc;
540 } else {
541 key_rsc = key->key_rsc;
542 wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, rsclen);
543 }
544
545 if (wpa_sm_set_key(sm, alg, sm->bssid, 0, 1, key_rsc, rsclen,
546 (u8 *) sm->ptk.tk1, keylen) < 0) {
547 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
548 "WPA: Failed to set PTK to the "
549 "driver (alg=%d keylen=%d bssid=" MACSTR ")",
550 alg, keylen, MAC2STR(sm->bssid));
551 return -1;
552 }
553
554 if (sm->wpa_ptk_rekey) {
555 eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL);
556 eloop_register_timeout(sm->wpa_ptk_rekey, 0, wpa_sm_rekey_ptk,
557 sm, NULL);
558 }
559
560 return 0;
561}
562
563
564static int wpa_supplicant_check_group_cipher(struct wpa_sm *sm,
565 int group_cipher,
566 int keylen, int maxkeylen,
567 int *key_rsc_len,
568 enum wpa_alg *alg)
569{
Dmitry Shmidt4530cfd2012-09-09 15:20:40 -0700570 int klen;
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700571
Dmitry Shmidt4530cfd2012-09-09 15:20:40 -0700572 *alg = wpa_cipher_to_alg(group_cipher);
573 if (*alg == WPA_ALG_NONE) {
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700574 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
575 "WPA: Unsupported Group Cipher %d",
576 group_cipher);
577 return -1;
578 }
Dmitry Shmidt4530cfd2012-09-09 15:20:40 -0700579 *key_rsc_len = wpa_cipher_rsc_len(group_cipher);
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700580
Dmitry Shmidt4530cfd2012-09-09 15:20:40 -0700581 klen = wpa_cipher_key_len(group_cipher);
582 if (keylen != klen || maxkeylen < klen) {
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700583 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
584 "WPA: Unsupported %s Group Cipher key length %d (%d)",
585 wpa_cipher_txt(group_cipher), keylen, maxkeylen);
Dmitry Shmidt4530cfd2012-09-09 15:20:40 -0700586 return -1;
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700587 }
Dmitry Shmidt4530cfd2012-09-09 15:20:40 -0700588 return 0;
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700589}
590
591
592struct wpa_gtk_data {
593 enum wpa_alg alg;
594 int tx, key_rsc_len, keyidx;
595 u8 gtk[32];
596 int gtk_len;
597};
598
599
600static int wpa_supplicant_install_gtk(struct wpa_sm *sm,
601 const struct wpa_gtk_data *gd,
602 const u8 *key_rsc)
603{
604 const u8 *_gtk = gd->gtk;
605 u8 gtk_buf[32];
606
607 wpa_hexdump_key(MSG_DEBUG, "WPA: Group Key", gd->gtk, gd->gtk_len);
608 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
609 "WPA: Installing GTK to the driver (keyidx=%d tx=%d len=%d)",
610 gd->keyidx, gd->tx, gd->gtk_len);
611 wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, gd->key_rsc_len);
612 if (sm->group_cipher == WPA_CIPHER_TKIP) {
613 /* Swap Tx/Rx keys for Michael MIC */
614 os_memcpy(gtk_buf, gd->gtk, 16);
615 os_memcpy(gtk_buf + 16, gd->gtk + 24, 8);
616 os_memcpy(gtk_buf + 24, gd->gtk + 16, 8);
617 _gtk = gtk_buf;
618 }
619 if (sm->pairwise_cipher == WPA_CIPHER_NONE) {
620 if (wpa_sm_set_key(sm, gd->alg, NULL,
621 gd->keyidx, 1, key_rsc, gd->key_rsc_len,
622 _gtk, gd->gtk_len) < 0) {
623 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
624 "WPA: Failed to set GTK to the driver "
625 "(Group only)");
626 return -1;
627 }
628 } else if (wpa_sm_set_key(sm, gd->alg, broadcast_ether_addr,
629 gd->keyidx, gd->tx, key_rsc, gd->key_rsc_len,
630 _gtk, gd->gtk_len) < 0) {
631 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
632 "WPA: Failed to set GTK to "
633 "the driver (alg=%d keylen=%d keyidx=%d)",
634 gd->alg, gd->gtk_len, gd->keyidx);
635 return -1;
636 }
637
638 return 0;
639}
640
641
642static int wpa_supplicant_gtk_tx_bit_workaround(const struct wpa_sm *sm,
643 int tx)
644{
645 if (tx && sm->pairwise_cipher != WPA_CIPHER_NONE) {
646 /* Ignore Tx bit for GTK if a pairwise key is used. One AP
647 * seemed to set this bit (incorrectly, since Tx is only when
648 * doing Group Key only APs) and without this workaround, the
649 * data connection does not work because wpa_supplicant
650 * configured non-zero keyidx to be used for unicast. */
651 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
652 "WPA: Tx bit set for GTK, but pairwise "
653 "keys are used - ignore Tx bit");
654 return 0;
655 }
656 return tx;
657}
658
659
660static int wpa_supplicant_pairwise_gtk(struct wpa_sm *sm,
661 const struct wpa_eapol_key *key,
662 const u8 *gtk, size_t gtk_len,
663 int key_info)
664{
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700665 struct wpa_gtk_data gd;
666
667 /*
668 * IEEE Std 802.11i-2004 - 8.5.2 EAPOL-Key frames - Figure 43x
669 * GTK KDE format:
670 * KeyID[bits 0-1], Tx [bit 2], Reserved [bits 3-7]
671 * Reserved [bits 0-7]
672 * GTK
673 */
674
675 os_memset(&gd, 0, sizeof(gd));
676 wpa_hexdump_key(MSG_DEBUG, "RSN: received GTK in pairwise handshake",
677 gtk, gtk_len);
678
679 if (gtk_len < 2 || gtk_len - 2 > sizeof(gd.gtk))
680 return -1;
681
682 gd.keyidx = gtk[0] & 0x3;
683 gd.tx = wpa_supplicant_gtk_tx_bit_workaround(sm,
684 !!(gtk[0] & BIT(2)));
685 gtk += 2;
686 gtk_len -= 2;
687
688 os_memcpy(gd.gtk, gtk, gtk_len);
689 gd.gtk_len = gtk_len;
690
691 if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher,
692 gtk_len, gtk_len,
693 &gd.key_rsc_len, &gd.alg) ||
694 wpa_supplicant_install_gtk(sm, &gd, key->key_rsc)) {
695 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
696 "RSN: Failed to install GTK");
697 return -1;
698 }
699
700 wpa_supplicant_key_neg_complete(sm, sm->bssid,
701 key_info & WPA_KEY_INFO_SECURE);
702 return 0;
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700703}
704
705
706static int ieee80211w_set_keys(struct wpa_sm *sm,
707 struct wpa_eapol_ie_parse *ie)
708{
709#ifdef CONFIG_IEEE80211W
710 if (sm->mgmt_group_cipher != WPA_CIPHER_AES_128_CMAC)
711 return 0;
712
713 if (ie->igtk) {
714 const struct wpa_igtk_kde *igtk;
715 u16 keyidx;
716 if (ie->igtk_len != sizeof(*igtk))
717 return -1;
718 igtk = (const struct wpa_igtk_kde *) ie->igtk;
719 keyidx = WPA_GET_LE16(igtk->keyid);
720 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: IGTK keyid %d "
721 "pn %02x%02x%02x%02x%02x%02x",
722 keyidx, MAC2STR(igtk->pn));
723 wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK",
724 igtk->igtk, WPA_IGTK_LEN);
725 if (keyidx > 4095) {
726 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
727 "WPA: Invalid IGTK KeyID %d", keyidx);
728 return -1;
729 }
730 if (wpa_sm_set_key(sm, WPA_ALG_IGTK, broadcast_ether_addr,
731 keyidx, 0, igtk->pn, sizeof(igtk->pn),
732 igtk->igtk, WPA_IGTK_LEN) < 0) {
733 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
734 "WPA: Failed to configure IGTK to the driver");
735 return -1;
736 }
737 }
738
739 return 0;
740#else /* CONFIG_IEEE80211W */
741 return 0;
742#endif /* CONFIG_IEEE80211W */
743}
744
745
746static void wpa_report_ie_mismatch(struct wpa_sm *sm,
747 const char *reason, const u8 *src_addr,
748 const u8 *wpa_ie, size_t wpa_ie_len,
749 const u8 *rsn_ie, size_t rsn_ie_len)
750{
751 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: %s (src=" MACSTR ")",
752 reason, MAC2STR(src_addr));
753
754 if (sm->ap_wpa_ie) {
755 wpa_hexdump(MSG_INFO, "WPA: WPA IE in Beacon/ProbeResp",
756 sm->ap_wpa_ie, sm->ap_wpa_ie_len);
757 }
758 if (wpa_ie) {
759 if (!sm->ap_wpa_ie) {
760 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
761 "WPA: No WPA IE in Beacon/ProbeResp");
762 }
763 wpa_hexdump(MSG_INFO, "WPA: WPA IE in 3/4 msg",
764 wpa_ie, wpa_ie_len);
765 }
766
767 if (sm->ap_rsn_ie) {
768 wpa_hexdump(MSG_INFO, "WPA: RSN IE in Beacon/ProbeResp",
769 sm->ap_rsn_ie, sm->ap_rsn_ie_len);
770 }
771 if (rsn_ie) {
772 if (!sm->ap_rsn_ie) {
773 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
774 "WPA: No RSN IE in Beacon/ProbeResp");
775 }
776 wpa_hexdump(MSG_INFO, "WPA: RSN IE in 3/4 msg",
777 rsn_ie, rsn_ie_len);
778 }
779
Dmitry Shmidtd5e49232012-12-03 15:08:10 -0800780 wpa_sm_deauthenticate(sm, WLAN_REASON_IE_IN_4WAY_DIFFERS);
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -0700781}
782
783
784#ifdef CONFIG_IEEE80211R
785
786static int ft_validate_mdie(struct wpa_sm *sm,
787 const unsigned char *src_addr,
788 struct wpa_eapol_ie_parse *ie,
789 const u8 *assoc_resp_mdie)
790{
791 struct rsn_mdie *mdie;
792
793 mdie = (struct rsn_mdie *) (ie->mdie + 2);
794 if (ie->mdie == NULL || ie->mdie_len < 2 + sizeof(*mdie) ||
795 os_memcmp(mdie->mobility_domain, sm->mobility_domain,
796 MOBILITY_DOMAIN_ID_LEN) != 0) {
797 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: MDIE in msg 3/4 did "
798 "not match with the current mobility domain");
799 return -1;
800 }
801
802 if (assoc_resp_mdie &&
803 (assoc_resp_mdie[1] != ie->mdie[1] ||
804 os_memcmp(assoc_resp_mdie, ie->mdie, 2 + ie->mdie[1]) != 0)) {
805 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: MDIE mismatch");
806 wpa_hexdump(MSG_DEBUG, "FT: MDIE in EAPOL-Key msg 3/4",
807 ie->mdie, 2 + ie->mdie[1]);
808 wpa_hexdump(MSG_DEBUG, "FT: MDIE in (Re)Association Response",
809 assoc_resp_mdie, 2 + assoc_resp_mdie[1]);
810 return -1;
811 }
812
813 return 0;
814}
815
816
817static int ft_validate_ftie(struct wpa_sm *sm,
818 const unsigned char *src_addr,
819 struct wpa_eapol_ie_parse *ie,
820 const u8 *assoc_resp_ftie)
821{
822 if (ie->ftie == NULL) {
823 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
824 "FT: No FTIE in EAPOL-Key msg 3/4");
825 return -1;
826 }
827
828 if (assoc_resp_ftie == NULL)
829 return 0;
830
831 if (assoc_resp_ftie[1] != ie->ftie[1] ||
832 os_memcmp(assoc_resp_ftie, ie->ftie, 2 + ie->ftie[1]) != 0) {
833 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: FTIE mismatch");
834 wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 3/4",
835 ie->ftie, 2 + ie->ftie[1]);
836 wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)Association Response",
837 assoc_resp_ftie, 2 + assoc_resp_ftie[1]);
838 return -1;
839 }
840
841 return 0;
842}
843
844
845static int ft_validate_rsnie(struct wpa_sm *sm,
846 const unsigned char *src_addr,
847 struct wpa_eapol_ie_parse *ie)
848{
849 struct wpa_ie_data rsn;
850
851 if (!ie->rsn_ie)
852 return 0;
853
854 /*
855 * Verify that PMKR1Name from EAPOL-Key message 3/4
856 * matches with the value we derived.
857 */
858 if (wpa_parse_wpa_ie_rsn(ie->rsn_ie, ie->rsn_ie_len, &rsn) < 0 ||
859 rsn.num_pmkid != 1 || rsn.pmkid == NULL) {
860 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "FT: No PMKR1Name in "
861 "FT 4-way handshake message 3/4");
862 return -1;
863 }
864
865 if (os_memcmp(rsn.pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN) != 0) {
866 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
867 "FT: PMKR1Name mismatch in "
868 "FT 4-way handshake message 3/4");
869 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Authenticator",
870 rsn.pmkid, WPA_PMK_NAME_LEN);
871 wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name",
872 sm->pmk_r1_name, WPA_PMK_NAME_LEN);
873 return -1;
874 }
875
876 return 0;
877}
878
879
880static int wpa_supplicant_validate_ie_ft(struct wpa_sm *sm,
881 const unsigned char *src_addr,
882 struct wpa_eapol_ie_parse *ie)
883{
884 const u8 *pos, *end, *mdie = NULL, *ftie = NULL;
885
886 if (sm->assoc_resp_ies) {
887 pos = sm->assoc_resp_ies;
888 end = pos + sm->assoc_resp_ies_len;
889 while (pos + 2 < end) {
890 if (pos + 2 + pos[1] > end)
891 break;
892 switch (*pos) {
893 case WLAN_EID_MOBILITY_DOMAIN:
894 mdie = pos;
895 break;
896 case WLAN_EID_FAST_BSS_TRANSITION:
897 ftie = pos;
898 break;
899 }
900 pos += 2 + pos[1];
901 }
902 }
903
904 if (ft_validate_mdie(sm, src_addr, ie, mdie) < 0 ||
905 ft_validate_ftie(sm, src_addr, ie, ftie) < 0 ||
906 ft_validate_rsnie(sm, src_addr, ie) < 0)
907 return -1;
908
909 return 0;
910}
911
912#endif /* CONFIG_IEEE80211R */
913
914
915static int wpa_supplicant_validate_ie(struct wpa_sm *sm,
916 const unsigned char *src_addr,
917 struct wpa_eapol_ie_parse *ie)
918{
919 if (sm->ap_wpa_ie == NULL && sm->ap_rsn_ie == NULL) {
920 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
921 "WPA: No WPA/RSN IE for this AP known. "
922 "Trying to get from scan results");
923 if (wpa_sm_get_beacon_ie(sm) < 0) {
924 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
925 "WPA: Could not find AP from "
926 "the scan results");
927 } else {
928 wpa_msg(sm->ctx->msg_ctx, MSG_DEBUG,
929 "WPA: Found the current AP from "
930 "updated scan results");
931 }
932 }
933
934 if (ie->wpa_ie == NULL && ie->rsn_ie == NULL &&
935 (sm->ap_wpa_ie || sm->ap_rsn_ie)) {
936 wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match "
937 "with IE in Beacon/ProbeResp (no IE?)",
938 src_addr, ie->wpa_ie, ie->wpa_ie_len,
939 ie->rsn_ie, ie->rsn_ie_len);
940 return -1;
941 }
942
943 if ((ie->wpa_ie && sm->ap_wpa_ie &&
944 (ie->wpa_ie_len != sm->ap_wpa_ie_len ||
945 os_memcmp(ie->wpa_ie, sm->ap_wpa_ie, ie->wpa_ie_len) != 0)) ||
946 (ie->rsn_ie && sm->ap_rsn_ie &&
947 wpa_compare_rsn_ie(wpa_key_mgmt_ft(sm->key_mgmt),
948 sm->ap_rsn_ie, sm->ap_rsn_ie_len,
949 ie->rsn_ie, ie->rsn_ie_len))) {
950 wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match "
951 "with IE in Beacon/ProbeResp",
952 src_addr, ie->wpa_ie, ie->wpa_ie_len,
953 ie->rsn_ie, ie->rsn_ie_len);
954 return -1;
955 }
956
957 if (sm->proto == WPA_PROTO_WPA &&
958 ie->rsn_ie && sm->ap_rsn_ie == NULL && sm->rsn_enabled) {
959 wpa_report_ie_mismatch(sm, "Possible downgrade attack "
960 "detected - RSN was enabled and RSN IE "
961 "was in msg 3/4, but not in "
962 "Beacon/ProbeResp",
963 src_addr, ie->wpa_ie, ie->wpa_ie_len,
964 ie->rsn_ie, ie->rsn_ie_len);
965 return -1;
966 }
967
968#ifdef CONFIG_IEEE80211R
969 if (wpa_key_mgmt_ft(sm->key_mgmt) &&
970 wpa_supplicant_validate_ie_ft(sm, src_addr, ie) < 0)
971 return -1;
972#endif /* CONFIG_IEEE80211R */
973
974 return 0;
975}
976
977
978/**
979 * wpa_supplicant_send_4_of_4 - Send message 4 of WPA/RSN 4-Way Handshake
980 * @sm: Pointer to WPA state machine data from wpa_sm_init()
981 * @dst: Destination address for the frame
982 * @key: Pointer to the EAPOL-Key frame header
983 * @ver: Version bits from EAPOL-Key Key Info
984 * @key_info: Key Info
985 * @kde: KDEs to include the EAPOL-Key frame
986 * @kde_len: Length of KDEs
987 * @ptk: PTK to use for keyed hash and encryption
988 * Returns: 0 on success, -1 on failure
989 */
990int wpa_supplicant_send_4_of_4(struct wpa_sm *sm, const unsigned char *dst,
991 const struct wpa_eapol_key *key,
992 u16 ver, u16 key_info,
993 const u8 *kde, size_t kde_len,
994 struct wpa_ptk *ptk)
995{
996 size_t rlen;
997 struct wpa_eapol_key *reply;
998 u8 *rbuf;
999
1000 if (kde)
1001 wpa_hexdump(MSG_DEBUG, "WPA: KDE for msg 4/4", kde, kde_len);
1002
1003 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL,
1004 sizeof(*reply) + kde_len,
1005 &rlen, (void *) &reply);
1006 if (rbuf == NULL)
1007 return -1;
1008
1009 reply->type = sm->proto == WPA_PROTO_RSN ?
1010 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
1011 key_info &= WPA_KEY_INFO_SECURE;
1012 key_info |= ver | WPA_KEY_INFO_KEY_TYPE | WPA_KEY_INFO_MIC;
1013 WPA_PUT_BE16(reply->key_info, key_info);
1014 if (sm->proto == WPA_PROTO_RSN)
1015 WPA_PUT_BE16(reply->key_length, 0);
1016 else
1017 os_memcpy(reply->key_length, key->key_length, 2);
1018 os_memcpy(reply->replay_counter, key->replay_counter,
1019 WPA_REPLAY_COUNTER_LEN);
1020
1021 WPA_PUT_BE16(reply->key_data_length, kde_len);
1022 if (kde)
1023 os_memcpy(reply + 1, kde, kde_len);
1024
1025 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 4/4");
1026 wpa_eapol_key_send(sm, ptk->kck, ver, dst, ETH_P_EAPOL,
1027 rbuf, rlen, reply->key_mic);
1028
1029 return 0;
1030}
1031
1032
1033static void wpa_supplicant_process_3_of_4(struct wpa_sm *sm,
1034 const struct wpa_eapol_key *key,
1035 u16 ver)
1036{
1037 u16 key_info, keylen, len;
1038 const u8 *pos;
1039 struct wpa_eapol_ie_parse ie;
1040
1041 wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE);
1042 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 3 of 4-Way "
1043 "Handshake from " MACSTR " (ver=%d)", MAC2STR(sm->bssid), ver);
1044
1045 key_info = WPA_GET_BE16(key->key_info);
1046
1047 pos = (const u8 *) (key + 1);
1048 len = WPA_GET_BE16(key->key_data_length);
1049 wpa_hexdump(MSG_DEBUG, "WPA: IE KeyData", pos, len);
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -08001050 if (wpa_supplicant_parse_ies(pos, len, &ie) < 0)
1051 goto failed;
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -07001052 if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
1053 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1054 "WPA: GTK IE in unencrypted key data");
1055 goto failed;
1056 }
1057#ifdef CONFIG_IEEE80211W
1058 if (ie.igtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
1059 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1060 "WPA: IGTK KDE in unencrypted key data");
1061 goto failed;
1062 }
1063
1064 if (ie.igtk && ie.igtk_len != sizeof(struct wpa_igtk_kde)) {
1065 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1066 "WPA: Invalid IGTK KDE length %lu",
1067 (unsigned long) ie.igtk_len);
1068 goto failed;
1069 }
1070#endif /* CONFIG_IEEE80211W */
1071
1072 if (wpa_supplicant_validate_ie(sm, sm->bssid, &ie) < 0)
1073 goto failed;
1074
1075 if (os_memcmp(sm->anonce, key->key_nonce, WPA_NONCE_LEN) != 0) {
1076 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1077 "WPA: ANonce from message 1 of 4-Way Handshake "
1078 "differs from 3 of 4-Way Handshake - drop packet (src="
1079 MACSTR ")", MAC2STR(sm->bssid));
1080 goto failed;
1081 }
1082
1083 keylen = WPA_GET_BE16(key->key_length);
Dmitry Shmidt4530cfd2012-09-09 15:20:40 -07001084 if (keylen != wpa_cipher_key_len(sm->pairwise_cipher)) {
1085 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1086 "WPA: Invalid %s key length %d (src=" MACSTR
1087 ")", wpa_cipher_txt(sm->pairwise_cipher), keylen,
1088 MAC2STR(sm->bssid));
1089 goto failed;
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -07001090 }
1091
1092 if (wpa_supplicant_send_4_of_4(sm, sm->bssid, key, ver, key_info,
1093 NULL, 0, &sm->ptk)) {
1094 goto failed;
1095 }
1096
1097 /* SNonce was successfully used in msg 3/4, so mark it to be renewed
1098 * for the next 4-Way Handshake. If msg 3 is received again, the old
1099 * SNonce will still be used to avoid changing PTK. */
1100 sm->renew_snonce = 1;
1101
1102 if (key_info & WPA_KEY_INFO_INSTALL) {
1103 if (wpa_supplicant_install_ptk(sm, key))
1104 goto failed;
1105 }
1106
1107 if (key_info & WPA_KEY_INFO_SECURE) {
1108 wpa_sm_mlme_setprotection(
1109 sm, sm->bssid, MLME_SETPROTECTION_PROTECT_TYPE_RX,
1110 MLME_SETPROTECTION_KEY_TYPE_PAIRWISE);
1111 eapol_sm_notify_portValid(sm->eapol, TRUE);
1112 }
1113 wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE);
1114
1115 if (ie.gtk &&
1116 wpa_supplicant_pairwise_gtk(sm, key,
1117 ie.gtk, ie.gtk_len, key_info) < 0) {
1118 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1119 "RSN: Failed to configure GTK");
1120 goto failed;
1121 }
1122
1123 if (ieee80211w_set_keys(sm, &ie) < 0) {
1124 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1125 "RSN: Failed to configure IGTK");
1126 goto failed;
1127 }
1128
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -08001129 wpa_sm_set_rekey_offload(sm);
1130
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -07001131 return;
1132
1133failed:
1134 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED);
1135}
1136
1137
1138static int wpa_supplicant_process_1_of_2_rsn(struct wpa_sm *sm,
1139 const u8 *keydata,
1140 size_t keydatalen,
1141 u16 key_info,
1142 struct wpa_gtk_data *gd)
1143{
1144 int maxkeylen;
1145 struct wpa_eapol_ie_parse ie;
1146
1147 wpa_hexdump(MSG_DEBUG, "RSN: msg 1/2 key data", keydata, keydatalen);
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -08001148 if (wpa_supplicant_parse_ies(keydata, keydatalen, &ie) < 0)
1149 return -1;
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -07001150 if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
1151 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1152 "WPA: GTK IE in unencrypted key data");
1153 return -1;
1154 }
1155 if (ie.gtk == NULL) {
1156 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1157 "WPA: No GTK IE in Group Key msg 1/2");
1158 return -1;
1159 }
1160 maxkeylen = gd->gtk_len = ie.gtk_len - 2;
1161
1162 if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher,
1163 gd->gtk_len, maxkeylen,
1164 &gd->key_rsc_len, &gd->alg))
1165 return -1;
1166
1167 wpa_hexdump(MSG_DEBUG, "RSN: received GTK in group key handshake",
1168 ie.gtk, ie.gtk_len);
1169 gd->keyidx = ie.gtk[0] & 0x3;
1170 gd->tx = wpa_supplicant_gtk_tx_bit_workaround(sm,
1171 !!(ie.gtk[0] & BIT(2)));
1172 if (ie.gtk_len - 2 > sizeof(gd->gtk)) {
1173 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1174 "RSN: Too long GTK in GTK IE (len=%lu)",
1175 (unsigned long) ie.gtk_len - 2);
1176 return -1;
1177 }
1178 os_memcpy(gd->gtk, ie.gtk + 2, ie.gtk_len - 2);
1179
1180 if (ieee80211w_set_keys(sm, &ie) < 0)
1181 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1182 "RSN: Failed to configure IGTK");
1183
1184 return 0;
1185}
1186
1187
1188static int wpa_supplicant_process_1_of_2_wpa(struct wpa_sm *sm,
1189 const struct wpa_eapol_key *key,
1190 size_t keydatalen, int key_info,
1191 size_t extra_len, u16 ver,
1192 struct wpa_gtk_data *gd)
1193{
1194 size_t maxkeylen;
1195 u8 ek[32];
1196
1197 gd->gtk_len = WPA_GET_BE16(key->key_length);
1198 maxkeylen = keydatalen;
1199 if (keydatalen > extra_len) {
1200 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1201 "WPA: Truncated EAPOL-Key packet: "
1202 "key_data_length=%lu > extra_len=%lu",
1203 (unsigned long) keydatalen, (unsigned long) extra_len);
1204 return -1;
1205 }
1206 if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
1207 if (maxkeylen < 8) {
1208 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1209 "WPA: Too short maxkeylen (%lu)",
1210 (unsigned long) maxkeylen);
1211 return -1;
1212 }
1213 maxkeylen -= 8;
1214 }
1215
1216 if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher,
1217 gd->gtk_len, maxkeylen,
1218 &gd->key_rsc_len, &gd->alg))
1219 return -1;
1220
1221 gd->keyidx = (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >>
1222 WPA_KEY_INFO_KEY_INDEX_SHIFT;
1223 if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4) {
1224 os_memcpy(ek, key->key_iv, 16);
1225 os_memcpy(ek + 16, sm->ptk.kek, 16);
1226 if (keydatalen > sizeof(gd->gtk)) {
1227 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1228 "WPA: RC4 key data too long (%lu)",
1229 (unsigned long) keydatalen);
1230 return -1;
1231 }
1232 os_memcpy(gd->gtk, key + 1, keydatalen);
1233 if (rc4_skip(ek, 32, 256, gd->gtk, keydatalen)) {
1234 wpa_msg(sm->ctx->msg_ctx, MSG_ERROR,
1235 "WPA: RC4 failed");
1236 return -1;
1237 }
1238 } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
1239 if (keydatalen % 8) {
1240 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1241 "WPA: Unsupported AES-WRAP len %lu",
1242 (unsigned long) keydatalen);
1243 return -1;
1244 }
1245 if (maxkeylen > sizeof(gd->gtk)) {
1246 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1247 "WPA: AES-WRAP key data "
1248 "too long (keydatalen=%lu maxkeylen=%lu)",
1249 (unsigned long) keydatalen,
1250 (unsigned long) maxkeylen);
1251 return -1;
1252 }
1253 if (aes_unwrap(sm->ptk.kek, maxkeylen / 8,
1254 (const u8 *) (key + 1), gd->gtk)) {
1255 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1256 "WPA: AES unwrap failed - could not decrypt "
1257 "GTK");
1258 return -1;
1259 }
1260 } else {
1261 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1262 "WPA: Unsupported key_info type %d", ver);
1263 return -1;
1264 }
1265 gd->tx = wpa_supplicant_gtk_tx_bit_workaround(
1266 sm, !!(key_info & WPA_KEY_INFO_TXRX));
1267 return 0;
1268}
1269
1270
1271static int wpa_supplicant_send_2_of_2(struct wpa_sm *sm,
1272 const struct wpa_eapol_key *key,
1273 int ver, u16 key_info)
1274{
1275 size_t rlen;
1276 struct wpa_eapol_key *reply;
1277 u8 *rbuf;
1278
1279 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL,
1280 sizeof(*reply), &rlen, (void *) &reply);
1281 if (rbuf == NULL)
1282 return -1;
1283
1284 reply->type = sm->proto == WPA_PROTO_RSN ?
1285 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
1286 key_info &= WPA_KEY_INFO_KEY_INDEX_MASK;
1287 key_info |= ver | WPA_KEY_INFO_MIC | WPA_KEY_INFO_SECURE;
1288 WPA_PUT_BE16(reply->key_info, key_info);
1289 if (sm->proto == WPA_PROTO_RSN)
1290 WPA_PUT_BE16(reply->key_length, 0);
1291 else
1292 os_memcpy(reply->key_length, key->key_length, 2);
1293 os_memcpy(reply->replay_counter, key->replay_counter,
1294 WPA_REPLAY_COUNTER_LEN);
1295
1296 WPA_PUT_BE16(reply->key_data_length, 0);
1297
1298 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Sending EAPOL-Key 2/2");
1299 wpa_eapol_key_send(sm, sm->ptk.kck, ver, sm->bssid, ETH_P_EAPOL,
1300 rbuf, rlen, reply->key_mic);
1301
1302 return 0;
1303}
1304
1305
1306static void wpa_supplicant_process_1_of_2(struct wpa_sm *sm,
1307 const unsigned char *src_addr,
1308 const struct wpa_eapol_key *key,
1309 int extra_len, u16 ver)
1310{
1311 u16 key_info, keydatalen;
1312 int rekey, ret;
1313 struct wpa_gtk_data gd;
1314
1315 os_memset(&gd, 0, sizeof(gd));
1316
1317 rekey = wpa_sm_get_state(sm) == WPA_COMPLETED;
1318 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: RX message 1 of Group Key "
1319 "Handshake from " MACSTR " (ver=%d)", MAC2STR(src_addr), ver);
1320
1321 key_info = WPA_GET_BE16(key->key_info);
1322 keydatalen = WPA_GET_BE16(key->key_data_length);
1323
1324 if (sm->proto == WPA_PROTO_RSN) {
1325 ret = wpa_supplicant_process_1_of_2_rsn(sm,
1326 (const u8 *) (key + 1),
1327 keydatalen, key_info,
1328 &gd);
1329 } else {
1330 ret = wpa_supplicant_process_1_of_2_wpa(sm, key, keydatalen,
1331 key_info, extra_len,
1332 ver, &gd);
1333 }
1334
1335 wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE);
1336
1337 if (ret)
1338 goto failed;
1339
1340 if (wpa_supplicant_install_gtk(sm, &gd, key->key_rsc) ||
1341 wpa_supplicant_send_2_of_2(sm, key, ver, key_info))
1342 goto failed;
1343
1344 if (rekey) {
1345 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Group rekeying "
1346 "completed with " MACSTR " [GTK=%s]",
1347 MAC2STR(sm->bssid), wpa_cipher_txt(sm->group_cipher));
1348 wpa_sm_cancel_auth_timeout(sm);
1349 wpa_sm_set_state(sm, WPA_COMPLETED);
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -08001350
1351 wpa_sm_set_rekey_offload(sm);
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -07001352 } else {
1353 wpa_supplicant_key_neg_complete(sm, sm->bssid,
1354 key_info &
1355 WPA_KEY_INFO_SECURE);
1356 }
1357 return;
1358
1359failed:
1360 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED);
1361}
1362
1363
1364static int wpa_supplicant_verify_eapol_key_mic(struct wpa_sm *sm,
1365 struct wpa_eapol_key *key,
1366 u16 ver,
1367 const u8 *buf, size_t len)
1368{
1369 u8 mic[16];
1370 int ok = 0;
1371
1372 os_memcpy(mic, key->key_mic, 16);
1373 if (sm->tptk_set) {
1374 os_memset(key->key_mic, 0, 16);
1375 wpa_eapol_key_mic(sm->tptk.kck, ver, buf, len,
1376 key->key_mic);
1377 if (os_memcmp(mic, key->key_mic, 16) != 0) {
1378 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1379 "WPA: Invalid EAPOL-Key MIC "
1380 "when using TPTK - ignoring TPTK");
1381 } else {
1382 ok = 1;
1383 sm->tptk_set = 0;
1384 sm->ptk_set = 1;
1385 os_memcpy(&sm->ptk, &sm->tptk, sizeof(sm->ptk));
1386 }
1387 }
1388
1389 if (!ok && sm->ptk_set) {
1390 os_memset(key->key_mic, 0, 16);
1391 wpa_eapol_key_mic(sm->ptk.kck, ver, buf, len,
1392 key->key_mic);
1393 if (os_memcmp(mic, key->key_mic, 16) != 0) {
1394 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1395 "WPA: Invalid EAPOL-Key MIC - "
1396 "dropping packet");
1397 return -1;
1398 }
1399 ok = 1;
1400 }
1401
1402 if (!ok) {
1403 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1404 "WPA: Could not verify EAPOL-Key MIC - "
1405 "dropping packet");
1406 return -1;
1407 }
1408
1409 os_memcpy(sm->rx_replay_counter, key->replay_counter,
1410 WPA_REPLAY_COUNTER_LEN);
1411 sm->rx_replay_counter_set = 1;
1412 return 0;
1413}
1414
1415
1416/* Decrypt RSN EAPOL-Key key data (RC4 or AES-WRAP) */
1417static int wpa_supplicant_decrypt_key_data(struct wpa_sm *sm,
1418 struct wpa_eapol_key *key, u16 ver)
1419{
1420 u16 keydatalen = WPA_GET_BE16(key->key_data_length);
1421
1422 wpa_hexdump(MSG_DEBUG, "RSN: encrypted key data",
1423 (u8 *) (key + 1), keydatalen);
1424 if (!sm->ptk_set) {
1425 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1426 "WPA: PTK not available, cannot decrypt EAPOL-Key Key "
1427 "Data");
1428 return -1;
1429 }
1430
1431 /* Decrypt key data here so that this operation does not need
1432 * to be implemented separately for each message type. */
1433 if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4) {
1434 u8 ek[32];
1435 os_memcpy(ek, key->key_iv, 16);
1436 os_memcpy(ek + 16, sm->ptk.kek, 16);
1437 if (rc4_skip(ek, 32, 256, (u8 *) (key + 1), keydatalen)) {
1438 wpa_msg(sm->ctx->msg_ctx, MSG_ERROR,
1439 "WPA: RC4 failed");
1440 return -1;
1441 }
1442 } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
1443 ver == WPA_KEY_INFO_TYPE_AES_128_CMAC) {
1444 u8 *buf;
1445 if (keydatalen % 8) {
1446 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1447 "WPA: Unsupported AES-WRAP len %d",
1448 keydatalen);
1449 return -1;
1450 }
1451 keydatalen -= 8; /* AES-WRAP adds 8 bytes */
1452 buf = os_malloc(keydatalen);
1453 if (buf == NULL) {
1454 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1455 "WPA: No memory for AES-UNWRAP buffer");
1456 return -1;
1457 }
1458 if (aes_unwrap(sm->ptk.kek, keydatalen / 8,
1459 (u8 *) (key + 1), buf)) {
1460 os_free(buf);
1461 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1462 "WPA: AES unwrap failed - "
1463 "could not decrypt EAPOL-Key key data");
1464 return -1;
1465 }
1466 os_memcpy(key + 1, buf, keydatalen);
1467 os_free(buf);
1468 WPA_PUT_BE16(key->key_data_length, keydatalen);
1469 } else {
1470 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1471 "WPA: Unsupported key_info type %d", ver);
1472 return -1;
1473 }
1474 wpa_hexdump_key(MSG_DEBUG, "WPA: decrypted EAPOL-Key key data",
1475 (u8 *) (key + 1), keydatalen);
1476 return 0;
1477}
1478
1479
1480/**
1481 * wpa_sm_aborted_cached - Notify WPA that PMKSA caching was aborted
1482 * @sm: Pointer to WPA state machine data from wpa_sm_init()
1483 */
1484void wpa_sm_aborted_cached(struct wpa_sm *sm)
1485{
1486 if (sm && sm->cur_pmksa) {
1487 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
1488 "RSN: Cancelling PMKSA caching attempt");
1489 sm->cur_pmksa = NULL;
1490 }
1491}
1492
1493
1494static void wpa_eapol_key_dump(struct wpa_sm *sm,
1495 const struct wpa_eapol_key *key)
1496{
1497#ifndef CONFIG_NO_STDOUT_DEBUG
1498 u16 key_info = WPA_GET_BE16(key->key_info);
1499
1500 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, " EAPOL-Key type=%d", key->type);
1501 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
1502 " key_info 0x%x (ver=%d keyidx=%d rsvd=%d %s%s%s%s%s%s%s%s)",
1503 key_info, key_info & WPA_KEY_INFO_TYPE_MASK,
1504 (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >>
1505 WPA_KEY_INFO_KEY_INDEX_SHIFT,
1506 (key_info & (BIT(13) | BIT(14) | BIT(15))) >> 13,
1507 key_info & WPA_KEY_INFO_KEY_TYPE ? "Pairwise" : "Group",
1508 key_info & WPA_KEY_INFO_INSTALL ? " Install" : "",
1509 key_info & WPA_KEY_INFO_ACK ? " Ack" : "",
1510 key_info & WPA_KEY_INFO_MIC ? " MIC" : "",
1511 key_info & WPA_KEY_INFO_SECURE ? " Secure" : "",
1512 key_info & WPA_KEY_INFO_ERROR ? " Error" : "",
1513 key_info & WPA_KEY_INFO_REQUEST ? " Request" : "",
1514 key_info & WPA_KEY_INFO_ENCR_KEY_DATA ? " Encr" : "");
1515 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
1516 " key_length=%u key_data_length=%u",
1517 WPA_GET_BE16(key->key_length),
1518 WPA_GET_BE16(key->key_data_length));
1519 wpa_hexdump(MSG_DEBUG, " replay_counter",
1520 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
1521 wpa_hexdump(MSG_DEBUG, " key_nonce", key->key_nonce, WPA_NONCE_LEN);
1522 wpa_hexdump(MSG_DEBUG, " key_iv", key->key_iv, 16);
1523 wpa_hexdump(MSG_DEBUG, " key_rsc", key->key_rsc, 8);
1524 wpa_hexdump(MSG_DEBUG, " key_id (reserved)", key->key_id, 8);
1525 wpa_hexdump(MSG_DEBUG, " key_mic", key->key_mic, 16);
1526#endif /* CONFIG_NO_STDOUT_DEBUG */
1527}
1528
1529
1530/**
1531 * wpa_sm_rx_eapol - Process received WPA EAPOL frames
1532 * @sm: Pointer to WPA state machine data from wpa_sm_init()
1533 * @src_addr: Source MAC address of the EAPOL packet
1534 * @buf: Pointer to the beginning of the EAPOL data (EAPOL header)
1535 * @len: Length of the EAPOL frame
1536 * Returns: 1 = WPA EAPOL-Key processed, 0 = not a WPA EAPOL-Key, -1 failure
1537 *
1538 * This function is called for each received EAPOL frame. Other than EAPOL-Key
1539 * frames can be skipped if filtering is done elsewhere. wpa_sm_rx_eapol() is
1540 * only processing WPA and WPA2 EAPOL-Key frames.
1541 *
1542 * The received EAPOL-Key packets are validated and valid packets are replied
1543 * to. In addition, key material (PTK, GTK) is configured at the end of a
1544 * successful key handshake.
1545 */
1546int wpa_sm_rx_eapol(struct wpa_sm *sm, const u8 *src_addr,
1547 const u8 *buf, size_t len)
1548{
1549 size_t plen, data_len, extra_len;
1550 struct ieee802_1x_hdr *hdr;
1551 struct wpa_eapol_key *key;
1552 u16 key_info, ver;
1553 u8 *tmp;
1554 int ret = -1;
1555 struct wpa_peerkey *peerkey = NULL;
1556
1557#ifdef CONFIG_IEEE80211R
1558 sm->ft_completed = 0;
1559#endif /* CONFIG_IEEE80211R */
1560
1561 if (len < sizeof(*hdr) + sizeof(*key)) {
1562 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
1563 "WPA: EAPOL frame too short to be a WPA "
1564 "EAPOL-Key (len %lu, expecting at least %lu)",
1565 (unsigned long) len,
1566 (unsigned long) sizeof(*hdr) + sizeof(*key));
1567 return 0;
1568 }
1569
1570 tmp = os_malloc(len);
1571 if (tmp == NULL)
1572 return -1;
1573 os_memcpy(tmp, buf, len);
1574
1575 hdr = (struct ieee802_1x_hdr *) tmp;
1576 key = (struct wpa_eapol_key *) (hdr + 1);
1577 plen = be_to_host16(hdr->length);
1578 data_len = plen + sizeof(*hdr);
1579 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
1580 "IEEE 802.1X RX: version=%d type=%d length=%lu",
1581 hdr->version, hdr->type, (unsigned long) plen);
1582
1583 if (hdr->version < EAPOL_VERSION) {
1584 /* TODO: backwards compatibility */
1585 }
1586 if (hdr->type != IEEE802_1X_TYPE_EAPOL_KEY) {
1587 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
1588 "WPA: EAPOL frame (type %u) discarded, "
1589 "not a Key frame", hdr->type);
1590 ret = 0;
1591 goto out;
1592 }
1593 if (plen > len - sizeof(*hdr) || plen < sizeof(*key)) {
1594 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
1595 "WPA: EAPOL frame payload size %lu "
1596 "invalid (frame size %lu)",
1597 (unsigned long) plen, (unsigned long) len);
1598 ret = 0;
1599 goto out;
1600 }
1601
1602 if (key->type != EAPOL_KEY_TYPE_WPA && key->type != EAPOL_KEY_TYPE_RSN)
1603 {
1604 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
1605 "WPA: EAPOL-Key type (%d) unknown, discarded",
1606 key->type);
1607 ret = 0;
1608 goto out;
1609 }
1610 wpa_eapol_key_dump(sm, key);
1611
1612 eapol_sm_notify_lower_layer_success(sm->eapol, 0);
1613 wpa_hexdump(MSG_MSGDUMP, "WPA: RX EAPOL-Key", tmp, len);
1614 if (data_len < len) {
1615 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
1616 "WPA: ignoring %lu bytes after the IEEE 802.1X data",
1617 (unsigned long) len - data_len);
1618 }
1619 key_info = WPA_GET_BE16(key->key_info);
1620 ver = key_info & WPA_KEY_INFO_TYPE_MASK;
1621 if (ver != WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 &&
1622#if defined(CONFIG_IEEE80211R) || defined(CONFIG_IEEE80211W)
1623 ver != WPA_KEY_INFO_TYPE_AES_128_CMAC &&
1624#endif /* CONFIG_IEEE80211R || CONFIG_IEEE80211W */
1625 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
1626 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1627 "WPA: Unsupported EAPOL-Key descriptor version %d",
1628 ver);
1629 goto out;
1630 }
1631
1632#ifdef CONFIG_IEEE80211R
1633 if (wpa_key_mgmt_ft(sm->key_mgmt)) {
1634 /* IEEE 802.11r uses a new key_info type (AES-128-CMAC). */
1635 if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) {
1636 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1637 "FT: AP did not use AES-128-CMAC");
1638 goto out;
1639 }
1640 } else
1641#endif /* CONFIG_IEEE80211R */
1642#ifdef CONFIG_IEEE80211W
1643 if (wpa_key_mgmt_sha256(sm->key_mgmt)) {
1644 if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) {
1645 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1646 "WPA: AP did not use the "
1647 "negotiated AES-128-CMAC");
1648 goto out;
1649 }
1650 } else
1651#endif /* CONFIG_IEEE80211W */
1652 if (sm->pairwise_cipher == WPA_CIPHER_CCMP &&
1653 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
1654 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1655 "WPA: CCMP is used, but EAPOL-Key "
1656 "descriptor version (%d) is not 2", ver);
1657 if (sm->group_cipher != WPA_CIPHER_CCMP &&
1658 !(key_info & WPA_KEY_INFO_KEY_TYPE)) {
1659 /* Earlier versions of IEEE 802.11i did not explicitly
1660 * require version 2 descriptor for all EAPOL-Key
1661 * packets, so allow group keys to use version 1 if
1662 * CCMP is not used for them. */
1663 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1664 "WPA: Backwards compatibility: allow invalid "
1665 "version for non-CCMP group keys");
1666 } else
1667 goto out;
1668 }
Dmitry Shmidt61d9df32012-08-29 16:22:06 -07001669 if (sm->pairwise_cipher == WPA_CIPHER_GCMP &&
1670 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
1671 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1672 "WPA: GCMP is used, but EAPOL-Key "
1673 "descriptor version (%d) is not 2", ver);
1674 goto out;
1675 }
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -07001676
1677#ifdef CONFIG_PEERKEY
1678 for (peerkey = sm->peerkey; peerkey; peerkey = peerkey->next) {
1679 if (os_memcmp(peerkey->addr, src_addr, ETH_ALEN) == 0)
1680 break;
1681 }
1682
1683 if (!(key_info & WPA_KEY_INFO_SMK_MESSAGE) && peerkey) {
1684 if (!peerkey->initiator && peerkey->replay_counter_set &&
1685 os_memcmp(key->replay_counter, peerkey->replay_counter,
1686 WPA_REPLAY_COUNTER_LEN) <= 0) {
1687 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1688 "RSN: EAPOL-Key Replay Counter did not "
1689 "increase (STK) - dropping packet");
1690 goto out;
1691 } else if (peerkey->initiator) {
1692 u8 _tmp[WPA_REPLAY_COUNTER_LEN];
1693 os_memcpy(_tmp, key->replay_counter,
1694 WPA_REPLAY_COUNTER_LEN);
1695 inc_byte_array(_tmp, WPA_REPLAY_COUNTER_LEN);
1696 if (os_memcmp(_tmp, peerkey->replay_counter,
1697 WPA_REPLAY_COUNTER_LEN) != 0) {
1698 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
1699 "RSN: EAPOL-Key Replay "
1700 "Counter did not match (STK) - "
1701 "dropping packet");
1702 goto out;
1703 }
1704 }
1705 }
1706
1707 if (peerkey && peerkey->initiator && (key_info & WPA_KEY_INFO_ACK)) {
1708 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1709 "RSN: Ack bit in key_info from STK peer");
1710 goto out;
1711 }
1712#endif /* CONFIG_PEERKEY */
1713
1714 if (!peerkey && sm->rx_replay_counter_set &&
1715 os_memcmp(key->replay_counter, sm->rx_replay_counter,
1716 WPA_REPLAY_COUNTER_LEN) <= 0) {
1717 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1718 "WPA: EAPOL-Key Replay Counter did not increase - "
1719 "dropping packet");
1720 goto out;
1721 }
1722
1723 if (!(key_info & (WPA_KEY_INFO_ACK | WPA_KEY_INFO_SMK_MESSAGE))
1724#ifdef CONFIG_PEERKEY
1725 && (peerkey == NULL || !peerkey->initiator)
1726#endif /* CONFIG_PEERKEY */
1727 ) {
1728 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1729 "WPA: No Ack bit in key_info");
1730 goto out;
1731 }
1732
1733 if (key_info & WPA_KEY_INFO_REQUEST) {
1734 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
1735 "WPA: EAPOL-Key with Request bit - dropped");
1736 goto out;
1737 }
1738
1739 if ((key_info & WPA_KEY_INFO_MIC) && !peerkey &&
1740 wpa_supplicant_verify_eapol_key_mic(sm, key, ver, tmp, data_len))
1741 goto out;
1742
1743#ifdef CONFIG_PEERKEY
1744 if ((key_info & WPA_KEY_INFO_MIC) && peerkey &&
1745 peerkey_verify_eapol_key_mic(sm, peerkey, key, ver, tmp, data_len))
1746 goto out;
1747#endif /* CONFIG_PEERKEY */
1748
1749 extra_len = data_len - sizeof(*hdr) - sizeof(*key);
1750
1751 if (WPA_GET_BE16(key->key_data_length) > extra_len) {
1752 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Invalid EAPOL-Key "
1753 "frame - key_data overflow (%d > %lu)",
1754 WPA_GET_BE16(key->key_data_length),
1755 (unsigned long) extra_len);
1756 goto out;
1757 }
1758 extra_len = WPA_GET_BE16(key->key_data_length);
1759
1760 if (sm->proto == WPA_PROTO_RSN &&
1761 (key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
1762 if (wpa_supplicant_decrypt_key_data(sm, key, ver))
1763 goto out;
1764 extra_len = WPA_GET_BE16(key->key_data_length);
1765 }
1766
1767 if (key_info & WPA_KEY_INFO_KEY_TYPE) {
1768 if (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) {
1769 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1770 "WPA: Ignored EAPOL-Key (Pairwise) with "
1771 "non-zero key index");
1772 goto out;
1773 }
1774 if (peerkey) {
1775 /* PeerKey 4-Way Handshake */
1776 peerkey_rx_eapol_4way(sm, peerkey, key, key_info, ver);
1777 } else if (key_info & WPA_KEY_INFO_MIC) {
1778 /* 3/4 4-Way Handshake */
1779 wpa_supplicant_process_3_of_4(sm, key, ver);
1780 } else {
1781 /* 1/4 4-Way Handshake */
1782 wpa_supplicant_process_1_of_4(sm, src_addr, key,
1783 ver);
1784 }
1785 } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) {
1786 /* PeerKey SMK Handshake */
1787 peerkey_rx_eapol_smk(sm, src_addr, key, extra_len, key_info,
1788 ver);
1789 } else {
1790 if (key_info & WPA_KEY_INFO_MIC) {
1791 /* 1/2 Group Key Handshake */
1792 wpa_supplicant_process_1_of_2(sm, src_addr, key,
1793 extra_len, ver);
1794 } else {
1795 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1796 "WPA: EAPOL-Key (Group) without Mic bit - "
1797 "dropped");
1798 }
1799 }
1800
1801 ret = 1;
1802
1803out:
1804 os_free(tmp);
1805 return ret;
1806}
1807
1808
1809#ifdef CONFIG_CTRL_IFACE
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -07001810static u32 wpa_key_mgmt_suite(struct wpa_sm *sm)
1811{
1812 switch (sm->key_mgmt) {
1813 case WPA_KEY_MGMT_IEEE8021X:
1814 return (sm->proto == WPA_PROTO_RSN ?
1815 RSN_AUTH_KEY_MGMT_UNSPEC_802_1X :
1816 WPA_AUTH_KEY_MGMT_UNSPEC_802_1X);
1817 case WPA_KEY_MGMT_PSK:
1818 return (sm->proto == WPA_PROTO_RSN ?
1819 RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X :
1820 WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X);
1821#ifdef CONFIG_IEEE80211R
1822 case WPA_KEY_MGMT_FT_IEEE8021X:
1823 return RSN_AUTH_KEY_MGMT_FT_802_1X;
1824 case WPA_KEY_MGMT_FT_PSK:
1825 return RSN_AUTH_KEY_MGMT_FT_PSK;
1826#endif /* CONFIG_IEEE80211R */
1827#ifdef CONFIG_IEEE80211W
1828 case WPA_KEY_MGMT_IEEE8021X_SHA256:
1829 return RSN_AUTH_KEY_MGMT_802_1X_SHA256;
1830 case WPA_KEY_MGMT_PSK_SHA256:
1831 return RSN_AUTH_KEY_MGMT_PSK_SHA256;
1832#endif /* CONFIG_IEEE80211W */
Dmitry Shmidtd5e49232012-12-03 15:08:10 -08001833 case WPA_KEY_MGMT_CCKM:
1834 return (sm->proto == WPA_PROTO_RSN ?
1835 RSN_AUTH_KEY_MGMT_CCKM:
1836 WPA_AUTH_KEY_MGMT_CCKM);
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -07001837 case WPA_KEY_MGMT_WPA_NONE:
1838 return WPA_AUTH_KEY_MGMT_NONE;
1839 default:
1840 return 0;
1841 }
1842}
1843
1844
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -07001845#define RSN_SUITE "%02x-%02x-%02x-%d"
1846#define RSN_SUITE_ARG(s) \
1847((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff
1848
1849/**
1850 * wpa_sm_get_mib - Dump text list of MIB entries
1851 * @sm: Pointer to WPA state machine data from wpa_sm_init()
1852 * @buf: Buffer for the list
1853 * @buflen: Length of the buffer
1854 * Returns: Number of bytes written to buffer
1855 *
1856 * This function is used fetch dot11 MIB variables.
1857 */
1858int wpa_sm_get_mib(struct wpa_sm *sm, char *buf, size_t buflen)
1859{
1860 char pmkid_txt[PMKID_LEN * 2 + 1];
1861 int rsna, ret;
1862 size_t len;
1863
1864 if (sm->cur_pmksa) {
1865 wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt),
1866 sm->cur_pmksa->pmkid, PMKID_LEN);
1867 } else
1868 pmkid_txt[0] = '\0';
1869
1870 if ((wpa_key_mgmt_wpa_psk(sm->key_mgmt) ||
1871 wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt)) &&
1872 sm->proto == WPA_PROTO_RSN)
1873 rsna = 1;
1874 else
1875 rsna = 0;
1876
1877 ret = os_snprintf(buf, buflen,
1878 "dot11RSNAOptionImplemented=TRUE\n"
1879 "dot11RSNAPreauthenticationImplemented=TRUE\n"
1880 "dot11RSNAEnabled=%s\n"
1881 "dot11RSNAPreauthenticationEnabled=%s\n"
1882 "dot11RSNAConfigVersion=%d\n"
1883 "dot11RSNAConfigPairwiseKeysSupported=5\n"
1884 "dot11RSNAConfigGroupCipherSize=%d\n"
1885 "dot11RSNAConfigPMKLifetime=%d\n"
1886 "dot11RSNAConfigPMKReauthThreshold=%d\n"
1887 "dot11RSNAConfigNumberOfPTKSAReplayCounters=1\n"
1888 "dot11RSNAConfigSATimeout=%d\n",
1889 rsna ? "TRUE" : "FALSE",
1890 rsna ? "TRUE" : "FALSE",
1891 RSN_VERSION,
Dmitry Shmidt4530cfd2012-09-09 15:20:40 -07001892 wpa_cipher_key_len(sm->group_cipher) * 8,
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -07001893 sm->dot11RSNAConfigPMKLifetime,
1894 sm->dot11RSNAConfigPMKReauthThreshold,
1895 sm->dot11RSNAConfigSATimeout);
1896 if (ret < 0 || (size_t) ret >= buflen)
1897 return 0;
1898 len = ret;
1899
1900 ret = os_snprintf(
1901 buf + len, buflen - len,
1902 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n"
1903 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n"
1904 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n"
1905 "dot11RSNAPMKIDUsed=%s\n"
1906 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n"
1907 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n"
1908 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n"
1909 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n"
1910 "dot11RSNA4WayHandshakeFailures=%u\n",
1911 RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)),
Dmitry Shmidt4530cfd2012-09-09 15:20:40 -07001912 RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto,
1913 sm->pairwise_cipher)),
1914 RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto,
1915 sm->group_cipher)),
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -07001916 pmkid_txt,
1917 RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)),
Dmitry Shmidt4530cfd2012-09-09 15:20:40 -07001918 RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto,
1919 sm->pairwise_cipher)),
1920 RSN_SUITE_ARG(wpa_cipher_to_suite(sm->proto,
1921 sm->group_cipher)),
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -07001922 sm->dot11RSNA4WayHandshakeFailures);
1923 if (ret >= 0 && (size_t) ret < buflen)
1924 len += ret;
1925
1926 return (int) len;
1927}
1928#endif /* CONFIG_CTRL_IFACE */
1929
1930
1931static void wpa_sm_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry,
Dmitry Shmidtd5e49232012-12-03 15:08:10 -08001932 void *ctx, enum pmksa_free_reason reason)
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -07001933{
1934 struct wpa_sm *sm = ctx;
Dmitry Shmidtd5e49232012-12-03 15:08:10 -08001935 int deauth = 0;
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -07001936
Dmitry Shmidtd5e49232012-12-03 15:08:10 -08001937 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "RSN: PMKSA cache entry free_cb: "
1938 MACSTR " reason=%d", MAC2STR(entry->aa), reason);
1939
1940 if (sm->cur_pmksa == entry) {
1941 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
1942 "RSN: %s current PMKSA entry",
1943 reason == PMKSA_REPLACE ? "replaced" : "removed");
1944 pmksa_cache_clear_current(sm);
1945
1946 /*
1947 * If an entry is simply being replaced, there's no need to
1948 * deauthenticate because it will be immediately re-added.
1949 * This happens when EAP authentication is completed again
1950 * (reauth or failed PMKSA caching attempt).
1951 */
1952 if (reason != PMKSA_REPLACE)
1953 deauth = 1;
1954 }
1955
1956 if (reason == PMKSA_EXPIRE &&
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -07001957 (sm->pmk_len == entry->pmk_len &&
1958 os_memcmp(sm->pmk, entry->pmk, sm->pmk_len) == 0)) {
1959 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
Dmitry Shmidtd5e49232012-12-03 15:08:10 -08001960 "RSN: deauthenticating due to expired PMK");
1961 pmksa_cache_clear_current(sm);
1962 deauth = 1;
1963 }
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -07001964
Dmitry Shmidtd5e49232012-12-03 15:08:10 -08001965 if (deauth) {
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -07001966 os_memset(sm->pmk, 0, sizeof(sm->pmk));
1967 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED);
1968 }
1969}
1970
1971
1972/**
1973 * wpa_sm_init - Initialize WPA state machine
1974 * @ctx: Context pointer for callbacks; this needs to be an allocated buffer
1975 * Returns: Pointer to the allocated WPA state machine data
1976 *
1977 * This function is used to allocate a new WPA state machine and the returned
1978 * value is passed to all WPA state machine calls.
1979 */
1980struct wpa_sm * wpa_sm_init(struct wpa_sm_ctx *ctx)
1981{
1982 struct wpa_sm *sm;
1983
1984 sm = os_zalloc(sizeof(*sm));
1985 if (sm == NULL)
1986 return NULL;
1987 dl_list_init(&sm->pmksa_candidates);
1988 sm->renew_snonce = 1;
1989 sm->ctx = ctx;
1990
1991 sm->dot11RSNAConfigPMKLifetime = 43200;
1992 sm->dot11RSNAConfigPMKReauthThreshold = 70;
1993 sm->dot11RSNAConfigSATimeout = 60;
1994
1995 sm->pmksa = pmksa_cache_init(wpa_sm_pmksa_free_cb, sm, sm);
1996 if (sm->pmksa == NULL) {
1997 wpa_msg(sm->ctx->msg_ctx, MSG_ERROR,
1998 "RSN: PMKSA cache initialization failed");
1999 os_free(sm);
2000 return NULL;
2001 }
2002
2003 return sm;
2004}
2005
2006
2007/**
2008 * wpa_sm_deinit - Deinitialize WPA state machine
2009 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2010 */
2011void wpa_sm_deinit(struct wpa_sm *sm)
2012{
2013 if (sm == NULL)
2014 return;
2015 pmksa_cache_deinit(sm->pmksa);
2016 eloop_cancel_timeout(wpa_sm_start_preauth, sm, NULL);
2017 eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL);
2018 os_free(sm->assoc_wpa_ie);
2019 os_free(sm->ap_wpa_ie);
2020 os_free(sm->ap_rsn_ie);
2021 os_free(sm->ctx);
2022 peerkey_deinit(sm);
2023#ifdef CONFIG_IEEE80211R
2024 os_free(sm->assoc_resp_ies);
2025#endif /* CONFIG_IEEE80211R */
2026 os_free(sm);
2027}
2028
2029
2030/**
2031 * wpa_sm_notify_assoc - Notify WPA state machine about association
2032 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2033 * @bssid: The BSSID of the new association
2034 *
2035 * This function is called to let WPA state machine know that the connection
2036 * was established.
2037 */
2038void wpa_sm_notify_assoc(struct wpa_sm *sm, const u8 *bssid)
2039{
2040 int clear_ptk = 1;
2041
2042 if (sm == NULL)
2043 return;
2044
2045 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
2046 "WPA: Association event - clear replay counter");
2047 os_memcpy(sm->bssid, bssid, ETH_ALEN);
2048 os_memset(sm->rx_replay_counter, 0, WPA_REPLAY_COUNTER_LEN);
2049 sm->rx_replay_counter_set = 0;
2050 sm->renew_snonce = 1;
2051 if (os_memcmp(sm->preauth_bssid, bssid, ETH_ALEN) == 0)
2052 rsn_preauth_deinit(sm);
2053
2054#ifdef CONFIG_IEEE80211R
2055 if (wpa_ft_is_completed(sm)) {
2056 /*
2057 * Clear portValid to kick EAPOL state machine to re-enter
2058 * AUTHENTICATED state to get the EAPOL port Authorized.
2059 */
2060 eapol_sm_notify_portValid(sm->eapol, FALSE);
2061 wpa_supplicant_key_neg_complete(sm, sm->bssid, 1);
2062
2063 /* Prepare for the next transition */
2064 wpa_ft_prepare_auth_request(sm, NULL);
2065
2066 clear_ptk = 0;
2067 }
2068#endif /* CONFIG_IEEE80211R */
2069
2070 if (clear_ptk) {
2071 /*
2072 * IEEE 802.11, 8.4.10: Delete PTK SA on (re)association if
2073 * this is not part of a Fast BSS Transition.
2074 */
2075 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Clear old PTK");
2076 sm->ptk_set = 0;
2077 sm->tptk_set = 0;
2078 }
2079
2080#ifdef CONFIG_TDLS
2081 wpa_tdls_assoc(sm);
2082#endif /* CONFIG_TDLS */
2083}
2084
2085
2086/**
2087 * wpa_sm_notify_disassoc - Notify WPA state machine about disassociation
2088 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2089 *
2090 * This function is called to let WPA state machine know that the connection
2091 * was lost. This will abort any existing pre-authentication session.
2092 */
2093void wpa_sm_notify_disassoc(struct wpa_sm *sm)
2094{
2095 rsn_preauth_deinit(sm);
Dmitry Shmidtd5e49232012-12-03 15:08:10 -08002096 pmksa_cache_clear_current(sm);
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -07002097 if (wpa_sm_get_state(sm) == WPA_4WAY_HANDSHAKE)
2098 sm->dot11RSNA4WayHandshakeFailures++;
2099#ifdef CONFIG_TDLS
2100 wpa_tdls_disassoc(sm);
2101#endif /* CONFIG_TDLS */
2102}
2103
2104
2105/**
2106 * wpa_sm_set_pmk - Set PMK
2107 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2108 * @pmk: The new PMK
2109 * @pmk_len: The length of the new PMK in bytes
2110 *
2111 * Configure the PMK for WPA state machine.
2112 */
2113void wpa_sm_set_pmk(struct wpa_sm *sm, const u8 *pmk, size_t pmk_len)
2114{
2115 if (sm == NULL)
2116 return;
2117
2118 sm->pmk_len = pmk_len;
2119 os_memcpy(sm->pmk, pmk, pmk_len);
2120
2121#ifdef CONFIG_IEEE80211R
2122 /* Set XXKey to be PSK for FT key derivation */
2123 sm->xxkey_len = pmk_len;
2124 os_memcpy(sm->xxkey, pmk, pmk_len);
2125#endif /* CONFIG_IEEE80211R */
2126}
2127
2128
2129/**
2130 * wpa_sm_set_pmk_from_pmksa - Set PMK based on the current PMKSA
2131 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2132 *
2133 * Take the PMK from the current PMKSA into use. If no PMKSA is active, the PMK
2134 * will be cleared.
2135 */
2136void wpa_sm_set_pmk_from_pmksa(struct wpa_sm *sm)
2137{
2138 if (sm == NULL)
2139 return;
2140
2141 if (sm->cur_pmksa) {
2142 sm->pmk_len = sm->cur_pmksa->pmk_len;
2143 os_memcpy(sm->pmk, sm->cur_pmksa->pmk, sm->pmk_len);
2144 } else {
2145 sm->pmk_len = PMK_LEN;
2146 os_memset(sm->pmk, 0, PMK_LEN);
2147 }
2148}
2149
2150
2151/**
2152 * wpa_sm_set_fast_reauth - Set fast reauthentication (EAP) enabled/disabled
2153 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2154 * @fast_reauth: Whether fast reauthentication (EAP) is allowed
2155 */
2156void wpa_sm_set_fast_reauth(struct wpa_sm *sm, int fast_reauth)
2157{
2158 if (sm)
2159 sm->fast_reauth = fast_reauth;
2160}
2161
2162
2163/**
2164 * wpa_sm_set_scard_ctx - Set context pointer for smartcard callbacks
2165 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2166 * @scard_ctx: Context pointer for smartcard related callback functions
2167 */
2168void wpa_sm_set_scard_ctx(struct wpa_sm *sm, void *scard_ctx)
2169{
2170 if (sm == NULL)
2171 return;
2172 sm->scard_ctx = scard_ctx;
2173 if (sm->preauth_eapol)
2174 eapol_sm_register_scard_ctx(sm->preauth_eapol, scard_ctx);
2175}
2176
2177
2178/**
2179 * wpa_sm_set_config - Notification of current configration change
2180 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2181 * @config: Pointer to current network configuration
2182 *
2183 * Notify WPA state machine that configuration has changed. config will be
2184 * stored as a backpointer to network configuration. This can be %NULL to clear
2185 * the stored pointed.
2186 */
2187void wpa_sm_set_config(struct wpa_sm *sm, struct rsn_supp_config *config)
2188{
2189 if (!sm)
2190 return;
2191
2192 if (config) {
2193 sm->network_ctx = config->network_ctx;
2194 sm->peerkey_enabled = config->peerkey_enabled;
2195 sm->allowed_pairwise_cipher = config->allowed_pairwise_cipher;
2196 sm->proactive_key_caching = config->proactive_key_caching;
2197 sm->eap_workaround = config->eap_workaround;
2198 sm->eap_conf_ctx = config->eap_conf_ctx;
2199 if (config->ssid) {
2200 os_memcpy(sm->ssid, config->ssid, config->ssid_len);
2201 sm->ssid_len = config->ssid_len;
2202 } else
2203 sm->ssid_len = 0;
2204 sm->wpa_ptk_rekey = config->wpa_ptk_rekey;
2205 } else {
2206 sm->network_ctx = NULL;
2207 sm->peerkey_enabled = 0;
2208 sm->allowed_pairwise_cipher = 0;
2209 sm->proactive_key_caching = 0;
2210 sm->eap_workaround = 0;
2211 sm->eap_conf_ctx = NULL;
2212 sm->ssid_len = 0;
2213 sm->wpa_ptk_rekey = 0;
2214 }
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -07002215}
2216
2217
2218/**
2219 * wpa_sm_set_own_addr - Set own MAC address
2220 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2221 * @addr: Own MAC address
2222 */
2223void wpa_sm_set_own_addr(struct wpa_sm *sm, const u8 *addr)
2224{
2225 if (sm)
2226 os_memcpy(sm->own_addr, addr, ETH_ALEN);
2227}
2228
2229
2230/**
2231 * wpa_sm_set_ifname - Set network interface name
2232 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2233 * @ifname: Interface name
2234 * @bridge_ifname: Optional bridge interface name (for pre-auth)
2235 */
2236void wpa_sm_set_ifname(struct wpa_sm *sm, const char *ifname,
2237 const char *bridge_ifname)
2238{
2239 if (sm) {
2240 sm->ifname = ifname;
2241 sm->bridge_ifname = bridge_ifname;
2242 }
2243}
2244
2245
2246/**
2247 * wpa_sm_set_eapol - Set EAPOL state machine pointer
2248 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2249 * @eapol: Pointer to EAPOL state machine allocated with eapol_sm_init()
2250 */
2251void wpa_sm_set_eapol(struct wpa_sm *sm, struct eapol_sm *eapol)
2252{
2253 if (sm)
2254 sm->eapol = eapol;
2255}
2256
2257
2258/**
2259 * wpa_sm_set_param - Set WPA state machine parameters
2260 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2261 * @param: Parameter field
2262 * @value: Parameter value
2263 * Returns: 0 on success, -1 on failure
2264 */
2265int wpa_sm_set_param(struct wpa_sm *sm, enum wpa_sm_conf_params param,
2266 unsigned int value)
2267{
2268 int ret = 0;
2269
2270 if (sm == NULL)
2271 return -1;
2272
2273 switch (param) {
2274 case RSNA_PMK_LIFETIME:
2275 if (value > 0)
2276 sm->dot11RSNAConfigPMKLifetime = value;
2277 else
2278 ret = -1;
2279 break;
2280 case RSNA_PMK_REAUTH_THRESHOLD:
2281 if (value > 0 && value <= 100)
2282 sm->dot11RSNAConfigPMKReauthThreshold = value;
2283 else
2284 ret = -1;
2285 break;
2286 case RSNA_SA_TIMEOUT:
2287 if (value > 0)
2288 sm->dot11RSNAConfigSATimeout = value;
2289 else
2290 ret = -1;
2291 break;
2292 case WPA_PARAM_PROTO:
2293 sm->proto = value;
2294 break;
2295 case WPA_PARAM_PAIRWISE:
2296 sm->pairwise_cipher = value;
2297 break;
2298 case WPA_PARAM_GROUP:
2299 sm->group_cipher = value;
2300 break;
2301 case WPA_PARAM_KEY_MGMT:
2302 sm->key_mgmt = value;
2303 break;
2304#ifdef CONFIG_IEEE80211W
2305 case WPA_PARAM_MGMT_GROUP:
2306 sm->mgmt_group_cipher = value;
2307 break;
2308#endif /* CONFIG_IEEE80211W */
2309 case WPA_PARAM_RSN_ENABLED:
2310 sm->rsn_enabled = value;
2311 break;
2312 case WPA_PARAM_MFP:
2313 sm->mfp = value;
2314 break;
2315 default:
2316 break;
2317 }
2318
2319 return ret;
2320}
2321
2322
2323/**
2324 * wpa_sm_get_param - Get WPA state machine parameters
2325 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2326 * @param: Parameter field
2327 * Returns: Parameter value
2328 */
2329unsigned int wpa_sm_get_param(struct wpa_sm *sm, enum wpa_sm_conf_params param)
2330{
2331 if (sm == NULL)
2332 return 0;
2333
2334 switch (param) {
2335 case RSNA_PMK_LIFETIME:
2336 return sm->dot11RSNAConfigPMKLifetime;
2337 case RSNA_PMK_REAUTH_THRESHOLD:
2338 return sm->dot11RSNAConfigPMKReauthThreshold;
2339 case RSNA_SA_TIMEOUT:
2340 return sm->dot11RSNAConfigSATimeout;
2341 case WPA_PARAM_PROTO:
2342 return sm->proto;
2343 case WPA_PARAM_PAIRWISE:
2344 return sm->pairwise_cipher;
2345 case WPA_PARAM_GROUP:
2346 return sm->group_cipher;
2347 case WPA_PARAM_KEY_MGMT:
2348 return sm->key_mgmt;
2349#ifdef CONFIG_IEEE80211W
2350 case WPA_PARAM_MGMT_GROUP:
2351 return sm->mgmt_group_cipher;
2352#endif /* CONFIG_IEEE80211W */
2353 case WPA_PARAM_RSN_ENABLED:
2354 return sm->rsn_enabled;
2355 default:
2356 return 0;
2357 }
2358}
2359
2360
2361/**
2362 * wpa_sm_get_status - Get WPA state machine
2363 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2364 * @buf: Buffer for status information
2365 * @buflen: Maximum buffer length
2366 * @verbose: Whether to include verbose status information
2367 * Returns: Number of bytes written to buf.
2368 *
2369 * Query WPA state machine for status information. This function fills in
2370 * a text area with current status information. If the buffer (buf) is not
2371 * large enough, status information will be truncated to fit the buffer.
2372 */
2373int wpa_sm_get_status(struct wpa_sm *sm, char *buf, size_t buflen,
2374 int verbose)
2375{
2376 char *pos = buf, *end = buf + buflen;
2377 int ret;
2378
2379 ret = os_snprintf(pos, end - pos,
2380 "pairwise_cipher=%s\n"
2381 "group_cipher=%s\n"
2382 "key_mgmt=%s\n",
2383 wpa_cipher_txt(sm->pairwise_cipher),
2384 wpa_cipher_txt(sm->group_cipher),
2385 wpa_key_mgmt_txt(sm->key_mgmt, sm->proto));
2386 if (ret < 0 || ret >= end - pos)
2387 return pos - buf;
2388 pos += ret;
Dmitry Shmidtd5e49232012-12-03 15:08:10 -08002389
2390 if (sm->mfp != NO_MGMT_FRAME_PROTECTION && sm->ap_rsn_ie) {
2391 struct wpa_ie_data rsn;
2392 if (wpa_parse_wpa_ie_rsn(sm->ap_rsn_ie, sm->ap_rsn_ie_len, &rsn)
2393 >= 0 &&
2394 rsn.capabilities & (WPA_CAPABILITY_MFPR |
2395 WPA_CAPABILITY_MFPC)) {
2396 ret = os_snprintf(pos, end - pos, "pmf=%d\n",
2397 (rsn.capabilities &
2398 WPA_CAPABILITY_MFPR) ? 2 : 1);
2399 if (ret < 0 || ret >= end - pos)
2400 return pos - buf;
2401 pos += ret;
2402 }
2403 }
2404
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -07002405 return pos - buf;
2406}
2407
2408
Dmitry Shmidtf7e0a992013-05-23 11:03:10 -07002409int wpa_sm_pmf_enabled(struct wpa_sm *sm)
2410{
2411 struct wpa_ie_data rsn;
2412
2413 if (sm->mfp == NO_MGMT_FRAME_PROTECTION || !sm->ap_rsn_ie)
2414 return 0;
2415
2416 if (wpa_parse_wpa_ie_rsn(sm->ap_rsn_ie, sm->ap_rsn_ie_len, &rsn) >= 0 &&
2417 rsn.capabilities & (WPA_CAPABILITY_MFPR | WPA_CAPABILITY_MFPC))
2418 return 1;
2419
2420 return 0;
2421}
2422
2423
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -07002424/**
2425 * wpa_sm_set_assoc_wpa_ie_default - Generate own WPA/RSN IE from configuration
2426 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2427 * @wpa_ie: Pointer to buffer for WPA/RSN IE
2428 * @wpa_ie_len: Pointer to the length of the wpa_ie buffer
2429 * Returns: 0 on success, -1 on failure
2430 */
2431int wpa_sm_set_assoc_wpa_ie_default(struct wpa_sm *sm, u8 *wpa_ie,
2432 size_t *wpa_ie_len)
2433{
2434 int res;
2435
2436 if (sm == NULL)
2437 return -1;
2438
2439 res = wpa_gen_wpa_ie(sm, wpa_ie, *wpa_ie_len);
2440 if (res < 0)
2441 return -1;
2442 *wpa_ie_len = res;
2443
2444 wpa_hexdump(MSG_DEBUG, "WPA: Set own WPA IE default",
2445 wpa_ie, *wpa_ie_len);
2446
2447 if (sm->assoc_wpa_ie == NULL) {
2448 /*
2449 * Make a copy of the WPA/RSN IE so that 4-Way Handshake gets
2450 * the correct version of the IE even if PMKSA caching is
2451 * aborted (which would remove PMKID from IE generation).
2452 */
2453 sm->assoc_wpa_ie = os_malloc(*wpa_ie_len);
2454 if (sm->assoc_wpa_ie == NULL)
2455 return -1;
2456
2457 os_memcpy(sm->assoc_wpa_ie, wpa_ie, *wpa_ie_len);
2458 sm->assoc_wpa_ie_len = *wpa_ie_len;
2459 }
2460
2461 return 0;
2462}
2463
2464
2465/**
2466 * wpa_sm_set_assoc_wpa_ie - Set own WPA/RSN IE from (Re)AssocReq
2467 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2468 * @ie: Pointer to IE data (starting from id)
2469 * @len: IE length
2470 * Returns: 0 on success, -1 on failure
2471 *
2472 * Inform WPA state machine about the WPA/RSN IE used in (Re)Association
2473 * Request frame. The IE will be used to override the default value generated
2474 * with wpa_sm_set_assoc_wpa_ie_default().
2475 */
2476int wpa_sm_set_assoc_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len)
2477{
2478 if (sm == NULL)
2479 return -1;
2480
2481 os_free(sm->assoc_wpa_ie);
2482 if (ie == NULL || len == 0) {
2483 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
2484 "WPA: clearing own WPA/RSN IE");
2485 sm->assoc_wpa_ie = NULL;
2486 sm->assoc_wpa_ie_len = 0;
2487 } else {
2488 wpa_hexdump(MSG_DEBUG, "WPA: set own WPA/RSN IE", ie, len);
2489 sm->assoc_wpa_ie = os_malloc(len);
2490 if (sm->assoc_wpa_ie == NULL)
2491 return -1;
2492
2493 os_memcpy(sm->assoc_wpa_ie, ie, len);
2494 sm->assoc_wpa_ie_len = len;
2495 }
2496
2497 return 0;
2498}
2499
2500
2501/**
2502 * wpa_sm_set_ap_wpa_ie - Set AP WPA IE from Beacon/ProbeResp
2503 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2504 * @ie: Pointer to IE data (starting from id)
2505 * @len: IE length
2506 * Returns: 0 on success, -1 on failure
2507 *
2508 * Inform WPA state machine about the WPA IE used in Beacon / Probe Response
2509 * frame.
2510 */
2511int wpa_sm_set_ap_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len)
2512{
2513 if (sm == NULL)
2514 return -1;
2515
2516 os_free(sm->ap_wpa_ie);
2517 if (ie == NULL || len == 0) {
2518 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
2519 "WPA: clearing AP WPA IE");
2520 sm->ap_wpa_ie = NULL;
2521 sm->ap_wpa_ie_len = 0;
2522 } else {
2523 wpa_hexdump(MSG_DEBUG, "WPA: set AP WPA IE", ie, len);
2524 sm->ap_wpa_ie = os_malloc(len);
2525 if (sm->ap_wpa_ie == NULL)
2526 return -1;
2527
2528 os_memcpy(sm->ap_wpa_ie, ie, len);
2529 sm->ap_wpa_ie_len = len;
2530 }
2531
2532 return 0;
2533}
2534
2535
2536/**
2537 * wpa_sm_set_ap_rsn_ie - Set AP RSN IE from Beacon/ProbeResp
2538 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2539 * @ie: Pointer to IE data (starting from id)
2540 * @len: IE length
2541 * Returns: 0 on success, -1 on failure
2542 *
2543 * Inform WPA state machine about the RSN IE used in Beacon / Probe Response
2544 * frame.
2545 */
2546int wpa_sm_set_ap_rsn_ie(struct wpa_sm *sm, const u8 *ie, size_t len)
2547{
2548 if (sm == NULL)
2549 return -1;
2550
2551 os_free(sm->ap_rsn_ie);
2552 if (ie == NULL || len == 0) {
2553 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
2554 "WPA: clearing AP RSN IE");
2555 sm->ap_rsn_ie = NULL;
2556 sm->ap_rsn_ie_len = 0;
2557 } else {
2558 wpa_hexdump(MSG_DEBUG, "WPA: set AP RSN IE", ie, len);
2559 sm->ap_rsn_ie = os_malloc(len);
2560 if (sm->ap_rsn_ie == NULL)
2561 return -1;
2562
2563 os_memcpy(sm->ap_rsn_ie, ie, len);
2564 sm->ap_rsn_ie_len = len;
2565 }
2566
2567 return 0;
2568}
2569
2570
2571/**
2572 * wpa_sm_parse_own_wpa_ie - Parse own WPA/RSN IE
2573 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2574 * @data: Pointer to data area for parsing results
2575 * Returns: 0 on success, -1 if IE is not known, or -2 on parsing failure
2576 *
2577 * Parse the contents of the own WPA or RSN IE from (Re)AssocReq and write the
2578 * parsed data into data.
2579 */
2580int wpa_sm_parse_own_wpa_ie(struct wpa_sm *sm, struct wpa_ie_data *data)
2581{
2582 if (sm == NULL)
2583 return -1;
2584
2585 if (sm->assoc_wpa_ie == NULL) {
2586 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
2587 "WPA: No WPA/RSN IE available from association info");
2588 return -1;
2589 }
2590 if (wpa_parse_wpa_ie(sm->assoc_wpa_ie, sm->assoc_wpa_ie_len, data))
2591 return -2;
2592 return 0;
2593}
2594
2595
2596int wpa_sm_pmksa_cache_list(struct wpa_sm *sm, char *buf, size_t len)
2597{
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -07002598 return pmksa_cache_list(sm->pmksa, buf, len);
Dmitry Shmidt8d520ff2011-05-09 14:06:53 -07002599}
2600
2601
2602void wpa_sm_drop_sa(struct wpa_sm *sm)
2603{
2604 wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Clear old PMK and PTK");
2605 sm->ptk_set = 0;
2606 sm->tptk_set = 0;
2607 os_memset(sm->pmk, 0, sizeof(sm->pmk));
2608 os_memset(&sm->ptk, 0, sizeof(sm->ptk));
2609 os_memset(&sm->tptk, 0, sizeof(sm->tptk));
2610}
2611
2612
2613int wpa_sm_has_ptk(struct wpa_sm *sm)
2614{
2615 if (sm == NULL)
2616 return 0;
2617 return sm->ptk_set;
2618}
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -08002619
2620
2621void wpa_sm_update_replay_ctr(struct wpa_sm *sm, const u8 *replay_ctr)
2622{
2623 os_memcpy(sm->rx_replay_counter, replay_ctr, WPA_REPLAY_COUNTER_LEN);
2624}
2625
2626
2627void wpa_sm_pmksa_cache_flush(struct wpa_sm *sm, void *network_ctx)
2628{
Dmitry Shmidtf7e0a992013-05-23 11:03:10 -07002629 pmksa_cache_flush(sm->pmksa, network_ctx, NULL, 0);
Dmitry Shmidt1f69aa52012-01-24 16:10:04 -08002630}
Dmitry Shmidt61d9df32012-08-29 16:22:06 -07002631
2632
Dmitry Shmidta54fa5f2013-01-15 13:53:35 -08002633#ifdef CONFIG_WNM
Dmitry Shmidt61d9df32012-08-29 16:22:06 -07002634int wpa_wnmsleep_install_key(struct wpa_sm *sm, u8 subelem_id, u8 *buf)
2635{
2636 struct wpa_gtk_data gd;
2637#ifdef CONFIG_IEEE80211W
2638 struct wpa_igtk_kde igd;
2639 u16 keyidx;
2640#endif /* CONFIG_IEEE80211W */
2641 u16 keyinfo;
2642 u8 keylen; /* plaintext key len */
Dmitry Shmidt61d9df32012-08-29 16:22:06 -07002643 u8 *key_rsc;
2644
2645 os_memset(&gd, 0, sizeof(gd));
2646#ifdef CONFIG_IEEE80211W
2647 os_memset(&igd, 0, sizeof(igd));
2648#endif /* CONFIG_IEEE80211W */
2649
Dmitry Shmidt4530cfd2012-09-09 15:20:40 -07002650 keylen = wpa_cipher_key_len(sm->group_cipher);
2651 gd.key_rsc_len = wpa_cipher_rsc_len(sm->group_cipher);
2652 gd.alg = wpa_cipher_to_alg(sm->group_cipher);
2653 if (gd.alg == WPA_ALG_NONE) {
Dmitry Shmidt61d9df32012-08-29 16:22:06 -07002654 wpa_printf(MSG_DEBUG, "Unsupported group cipher suite");
2655 return -1;
2656 }
2657
2658 if (subelem_id == WNM_SLEEP_SUBELEM_GTK) {
2659 key_rsc = buf + 5;
Dmitry Shmidta54fa5f2013-01-15 13:53:35 -08002660 keyinfo = WPA_GET_LE16(buf + 2);
Dmitry Shmidt61d9df32012-08-29 16:22:06 -07002661 gd.gtk_len = keylen;
2662 if (gd.gtk_len != buf[4]) {
2663 wpa_printf(MSG_DEBUG, "GTK len mismatch len %d vs %d",
2664 gd.gtk_len, buf[4]);
2665 return -1;
2666 }
2667 gd.keyidx = keyinfo & 0x03; /* B0 - B1 */
2668 gd.tx = wpa_supplicant_gtk_tx_bit_workaround(
2669 sm, !!(keyinfo & WPA_KEY_INFO_TXRX));
2670
Dmitry Shmidta54fa5f2013-01-15 13:53:35 -08002671 os_memcpy(gd.gtk, buf + 13, gd.gtk_len);
Dmitry Shmidt61d9df32012-08-29 16:22:06 -07002672
2673 wpa_hexdump_key(MSG_DEBUG, "Install GTK (WNM SLEEP)",
2674 gd.gtk, gd.gtk_len);
2675 if (wpa_supplicant_install_gtk(sm, &gd, key_rsc)) {
2676 wpa_printf(MSG_DEBUG, "Failed to install the GTK in "
2677 "WNM mode");
2678 return -1;
2679 }
2680#ifdef CONFIG_IEEE80211W
2681 } else if (subelem_id == WNM_SLEEP_SUBELEM_IGTK) {
Dmitry Shmidt61d9df32012-08-29 16:22:06 -07002682 os_memcpy(igd.keyid, buf + 2, 2);
2683 os_memcpy(igd.pn, buf + 4, 6);
2684
2685 keyidx = WPA_GET_LE16(igd.keyid);
Dmitry Shmidta54fa5f2013-01-15 13:53:35 -08002686 os_memcpy(igd.igtk, buf + 10, WPA_IGTK_LEN);
Dmitry Shmidt61d9df32012-08-29 16:22:06 -07002687
2688 wpa_hexdump_key(MSG_DEBUG, "Install IGTK (WNM SLEEP)",
2689 igd.igtk, WPA_IGTK_LEN);
2690 if (wpa_sm_set_key(sm, WPA_ALG_IGTK, broadcast_ether_addr,
2691 keyidx, 0, igd.pn, sizeof(igd.pn),
2692 igd.igtk, WPA_IGTK_LEN) < 0) {
2693 wpa_printf(MSG_DEBUG, "Failed to install the IGTK in "
2694 "WNM mode");
2695 return -1;
2696 }
2697#endif /* CONFIG_IEEE80211W */
2698 } else {
2699 wpa_printf(MSG_DEBUG, "Unknown element id");
2700 return -1;
2701 }
2702
2703 return 0;
2704}
Dmitry Shmidta54fa5f2013-01-15 13:53:35 -08002705#endif /* CONFIG_WNM */