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Added WirelessManager, a port of wpa_supplicant.
[AROS.git] / workbench / network / WirelessManager / src / rsn_supp / wpa.c
blob45124d4f236b55f14394698a2113418de2badfc3
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 "common/ieee802_11_defs.h"
21 #include "eapol_supp/eapol_supp_sm.h"
22 #include "wpa.h"
23 #include "eloop.h"
24 #include "preauth.h"
25 #include "pmksa_cache.h"
26 #include "wpa_i.h"
27 #include "wpa_ie.h"
28 #include "peerkey.h"
29
30
31 /**
32 * wpa_eapol_key_send - Send WPA/RSN EAPOL-Key message
33 * @sm: Pointer to WPA state machine data from wpa_sm_init()
34 * @kck: Key Confirmation Key (KCK, part of PTK)
35 * @ver: Version field from Key Info
36 * @dest: Destination address for the frame
37 * @proto: Ethertype (usually ETH_P_EAPOL)
38 * @msg: EAPOL-Key message
39 * @msg_len: Length of message
40 * @key_mic: Pointer to the buffer to which the EAPOL-Key MIC is written
41 */
42 void wpa_eapol_key_send(struct wpa_sm *sm, const u8 *kck,
43 int ver, const u8 *dest, u16 proto,
44 u8 *msg, size_t msg_len, u8 *key_mic)
45 {
46 if (is_zero_ether_addr(dest) && is_zero_ether_addr(sm->bssid)) {
47 /*
48 * Association event was not yet received; try to fetch
49 * BSSID from the driver.
50 */
51 if (wpa_sm_get_bssid(sm, sm->bssid) < 0) {
52 wpa_printf(MSG_DEBUG, "WPA: Failed to read BSSID for "
53 "EAPOL-Key destination address");
54 } else {
55 dest = sm->bssid;
56 wpa_printf(MSG_DEBUG, "WPA: Use BSSID (" MACSTR
57 ") as the destination for EAPOL-Key",
58 MAC2STR(dest));
59 }
60 }
61 if (key_mic &&
62 wpa_eapol_key_mic(kck, ver, msg, msg_len, key_mic)) {
63 wpa_printf(MSG_ERROR, "WPA: Failed to generate EAPOL-Key "
64 "version %d MIC", ver);
65 goto out;
66 }
67 wpa_hexdump(MSG_MSGDUMP, "WPA: TX EAPOL-Key", msg, msg_len);
68 wpa_sm_ether_send(sm, dest, proto, msg, msg_len);
69 eapol_sm_notify_tx_eapol_key(sm->eapol);
70 out:
71 os_free(msg);
72 }
73
74
75 /**
76 * wpa_sm_key_request - Send EAPOL-Key Request
77 * @sm: Pointer to WPA state machine data from wpa_sm_init()
78 * @error: Indicate whether this is an Michael MIC error report
79 * @pairwise: 1 = error report for pairwise packet, 0 = for group packet
80 *
81 * Send an EAPOL-Key Request to the current authenticator. This function is
82 * used to request rekeying and it is usually called when a local Michael MIC
83 * failure is detected.
84 */
85 void wpa_sm_key_request(struct wpa_sm *sm, int error, int pairwise)
86 {
87 size_t rlen;
88 struct wpa_eapol_key *reply;
89 int key_info, ver;
90 u8 bssid[ETH_ALEN], *rbuf;
91
92 if (wpa_key_mgmt_ft(sm->key_mgmt) || wpa_key_mgmt_sha256(sm->key_mgmt))
93 ver = WPA_KEY_INFO_TYPE_AES_128_CMAC;
94 else if (sm->pairwise_cipher == WPA_CIPHER_CCMP)
95 ver = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES;
96 else
97 ver = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4;
98
99 if (wpa_sm_get_bssid(sm, bssid) < 0) {
100 wpa_printf(MSG_WARNING, "Failed to read BSSID for EAPOL-Key "
101 "request");
102 return;
103 }
104
105 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL,
106 sizeof(*reply), &rlen, (void *) &reply);
107 if (rbuf == NULL)
108 return;
109
110 reply->type = sm->proto == WPA_PROTO_RSN ?
111 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
112 key_info = WPA_KEY_INFO_REQUEST | ver;
113 if (sm->ptk_set)
114 key_info |= WPA_KEY_INFO_MIC;
115 if (error)
116 key_info |= WPA_KEY_INFO_ERROR;
117 if (pairwise)
118 key_info |= WPA_KEY_INFO_KEY_TYPE;
119 WPA_PUT_BE16(reply->key_info, key_info);
120 WPA_PUT_BE16(reply->key_length, 0);
121 os_memcpy(reply->replay_counter, sm->request_counter,
122 WPA_REPLAY_COUNTER_LEN);
123 inc_byte_array(sm->request_counter, WPA_REPLAY_COUNTER_LEN);
124
125 WPA_PUT_BE16(reply->key_data_length, 0);
126
127 wpa_printf(MSG_INFO, "WPA: Sending EAPOL-Key Request (error=%d "
128 "pairwise=%d ptk_set=%d len=%lu)",
129 error, pairwise, sm->ptk_set, (unsigned long) rlen);
130 wpa_eapol_key_send(sm, sm->ptk.kck, ver, bssid, ETH_P_EAPOL,
131 rbuf, rlen, key_info & WPA_KEY_INFO_MIC ?
132 reply->key_mic : NULL);
133 }
134
135
136 static int wpa_supplicant_get_pmk(struct wpa_sm *sm,
137 const unsigned char *src_addr,
138 const u8 *pmkid)
139 {
140 int abort_cached = 0;
141
142 if (pmkid && !sm->cur_pmksa) {
143 /* When using drivers that generate RSN IE, wpa_supplicant may
144 * not have enough time to get the association information
145 * event before receiving this 1/4 message, so try to find a
146 * matching PMKSA cache entry here. */
147 sm->cur_pmksa = pmksa_cache_get(sm->pmksa, src_addr, pmkid);
148 if (sm->cur_pmksa) {
149 wpa_printf(MSG_DEBUG, "RSN: found matching PMKID from "
150 "PMKSA cache");
151 } else {
152 wpa_printf(MSG_DEBUG, "RSN: no matching PMKID found");
153 abort_cached = 1;
154 }
155 }
156
157 if (pmkid && sm->cur_pmksa &&
158 os_memcmp(pmkid, sm->cur_pmksa->pmkid, PMKID_LEN) == 0) {
159 wpa_hexdump(MSG_DEBUG, "RSN: matched PMKID", pmkid, PMKID_LEN);
160 wpa_sm_set_pmk_from_pmksa(sm);
161 wpa_hexdump_key(MSG_DEBUG, "RSN: PMK from PMKSA cache",
162 sm->pmk, sm->pmk_len);
163 eapol_sm_notify_cached(sm->eapol);
164 #ifdef CONFIG_IEEE80211R
165 sm->xxkey_len = 0;
166 #endif /* CONFIG_IEEE80211R */
167 } else if (wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt) && sm->eapol) {
168 int res, pmk_len;
169 pmk_len = PMK_LEN;
170 res = eapol_sm_get_key(sm->eapol, sm->pmk, PMK_LEN);
171 if (res) {
172 /*
173 * EAP-LEAP is an exception from other EAP methods: it
174 * uses only 16-byte PMK.
175 */
176 res = eapol_sm_get_key(sm->eapol, sm->pmk, 16);
177 pmk_len = 16;
178 } else {
179 #ifdef CONFIG_IEEE80211R
180 u8 buf[2 * PMK_LEN];
181 if (eapol_sm_get_key(sm->eapol, buf, 2 * PMK_LEN) == 0)
182 {
183 os_memcpy(sm->xxkey, buf + PMK_LEN, PMK_LEN);
184 sm->xxkey_len = PMK_LEN;
185 os_memset(buf, 0, sizeof(buf));
186 }
187 #endif /* CONFIG_IEEE80211R */
188 }
189 if (res == 0) {
190 wpa_hexdump_key(MSG_DEBUG, "WPA: PMK from EAPOL state "
191 "machines", sm->pmk, pmk_len);
192 sm->pmk_len = pmk_len;
193 if (sm->proto == WPA_PROTO_RSN) {
194 pmksa_cache_add(sm->pmksa, sm->pmk, pmk_len,
195 src_addr, sm->own_addr,
196 sm->network_ctx, sm->key_mgmt);
197 }
198 if (!sm->cur_pmksa && pmkid &&
199 pmksa_cache_get(sm->pmksa, src_addr, pmkid)) {
200 wpa_printf(MSG_DEBUG, "RSN: the new PMK "
201 "matches with the PMKID");
202 abort_cached = 0;
203 }
204 } else {
205 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
206 "WPA: Failed to get master session key from "
207 "EAPOL state machines");
208 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
209 "WPA: Key handshake aborted");
210 if (sm->cur_pmksa) {
211 wpa_printf(MSG_DEBUG, "RSN: Cancelled PMKSA "
212 "caching attempt");
213 sm->cur_pmksa = NULL;
214 abort_cached = 1;
215 } else if (!abort_cached) {
216 return -1;
217 }
218 }
219 }
220
221 if (abort_cached && wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt)) {
222 /* Send EAPOL-Start to trigger full EAP authentication. */
223 u8 *buf;
224 size_t buflen;
225
226 wpa_printf(MSG_DEBUG, "RSN: no PMKSA entry found - trigger "
227 "full EAP authentication");
228 buf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_START,
229 NULL, 0, &buflen, NULL);
230 if (buf) {
231 wpa_sm_ether_send(sm, sm->bssid, ETH_P_EAPOL,
232 buf, buflen);
233 os_free(buf);
234 return -2;
235 }
236
237 return -1;
238 }
239
240 return 0;
241 }
242
243
244 /**
245 * wpa_supplicant_send_2_of_4 - Send message 2 of WPA/RSN 4-Way Handshake
246 * @sm: Pointer to WPA state machine data from wpa_sm_init()
247 * @dst: Destination address for the frame
248 * @key: Pointer to the EAPOL-Key frame header
249 * @ver: Version bits from EAPOL-Key Key Info
250 * @nonce: Nonce value for the EAPOL-Key frame
251 * @wpa_ie: WPA/RSN IE
252 * @wpa_ie_len: Length of the WPA/RSN IE
253 * @ptk: PTK to use for keyed hash and encryption
254 * Returns: 0 on success, -1 on failure
255 */
256 int wpa_supplicant_send_2_of_4(struct wpa_sm *sm, const unsigned char *dst,
257 const struct wpa_eapol_key *key,
258 int ver, const u8 *nonce,
259 const u8 *wpa_ie, size_t wpa_ie_len,
260 struct wpa_ptk *ptk)
261 {
262 size_t rlen;
263 struct wpa_eapol_key *reply;
264 u8 *rbuf;
265 u8 *rsn_ie_buf = NULL;
266
267 if (wpa_ie == NULL) {
268 wpa_printf(MSG_WARNING, "WPA: No wpa_ie set - cannot "
269 "generate msg 2/4");
270 return -1;
271 }
272
273 #ifdef CONFIG_IEEE80211R
274 if (wpa_key_mgmt_ft(sm->key_mgmt)) {
275 int res;
276
277 /*
278 * Add PMKR1Name into RSN IE (PMKID-List) and add MDIE and
279 * FTIE from (Re)Association Response.
280 */
281 rsn_ie_buf = os_malloc(wpa_ie_len + 2 + 2 + PMKID_LEN +
282 sm->assoc_resp_ies_len);
283 if (rsn_ie_buf == NULL)
284 return -1;
285 os_memcpy(rsn_ie_buf, wpa_ie, wpa_ie_len);
286 res = wpa_insert_pmkid(rsn_ie_buf, wpa_ie_len,
287 sm->pmk_r1_name);
288 if (res < 0) {
289 os_free(rsn_ie_buf);
290 return -1;
291 }
292 wpa_ie_len += res;
293
294 if (sm->assoc_resp_ies) {
295 os_memcpy(rsn_ie_buf + wpa_ie_len, sm->assoc_resp_ies,
296 sm->assoc_resp_ies_len);
297 wpa_ie_len += sm->assoc_resp_ies_len;
298 }
299
300 wpa_ie = rsn_ie_buf;
301 }
302 #endif /* CONFIG_IEEE80211R */
303
304 wpa_hexdump(MSG_DEBUG, "WPA: WPA IE for msg 2/4", wpa_ie, wpa_ie_len);
305
306 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY,
307 NULL, sizeof(*reply) + wpa_ie_len,
308 &rlen, (void *) &reply);
309 if (rbuf == NULL) {
310 os_free(rsn_ie_buf);
311 return -1;
312 }
313
314 reply->type = sm->proto == WPA_PROTO_RSN ?
315 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
316 WPA_PUT_BE16(reply->key_info,
317 ver | WPA_KEY_INFO_KEY_TYPE | WPA_KEY_INFO_MIC);
318 if (sm->proto == WPA_PROTO_RSN)
319 WPA_PUT_BE16(reply->key_length, 0);
320 else
321 os_memcpy(reply->key_length, key->key_length, 2);
322 os_memcpy(reply->replay_counter, key->replay_counter,
323 WPA_REPLAY_COUNTER_LEN);
324
325 WPA_PUT_BE16(reply->key_data_length, wpa_ie_len);
326 os_memcpy(reply + 1, wpa_ie, wpa_ie_len);
327 os_free(rsn_ie_buf);
328
329 os_memcpy(reply->key_nonce, nonce, WPA_NONCE_LEN);
330
331 wpa_printf(MSG_DEBUG, "WPA: Sending EAPOL-Key 2/4");
332 wpa_eapol_key_send(sm, ptk->kck, ver, dst, ETH_P_EAPOL,
333 rbuf, rlen, reply->key_mic);
334
335 return 0;
336 }
337
338
339 static int wpa_derive_ptk(struct wpa_sm *sm, const unsigned char *src_addr,
340 const struct wpa_eapol_key *key,
341 struct wpa_ptk *ptk)
342 {
343 size_t ptk_len = sm->pairwise_cipher == WPA_CIPHER_CCMP ? 48 : 64;
344 #ifdef CONFIG_IEEE80211R
345 if (wpa_key_mgmt_ft(sm->key_mgmt))
346 return wpa_derive_ptk_ft(sm, src_addr, key, ptk, ptk_len);
347 #endif /* CONFIG_IEEE80211R */
348
349 wpa_pmk_to_ptk(sm->pmk, sm->pmk_len, "Pairwise key expansion",
350 sm->own_addr, sm->bssid, sm->snonce, key->key_nonce,
351 (u8 *) ptk, ptk_len,
352 wpa_key_mgmt_sha256(sm->key_mgmt));
353 return 0;
354 }
355
356
357 static void wpa_supplicant_process_1_of_4(struct wpa_sm *sm,
358 const unsigned char *src_addr,
359 const struct wpa_eapol_key *key,
360 u16 ver)
361 {
362 struct wpa_eapol_ie_parse ie;
363 struct wpa_ptk *ptk;
364 u8 buf[8];
365 int res;
366
367 if (wpa_sm_get_network_ctx(sm) == NULL) {
368 wpa_printf(MSG_WARNING, "WPA: No SSID info found (msg 1 of "
369 "4).");
370 return;
371 }
372
373 wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE);
374 wpa_printf(MSG_DEBUG, "WPA: RX message 1 of 4-Way Handshake from "
375 MACSTR " (ver=%d)", MAC2STR(src_addr), ver);
376
377 os_memset(&ie, 0, sizeof(ie));
378
379 #ifndef CONFIG_NO_WPA2
380 if (sm->proto == WPA_PROTO_RSN) {
381 /* RSN: msg 1/4 should contain PMKID for the selected PMK */
382 const u8 *_buf = (const u8 *) (key + 1);
383 size_t len = WPA_GET_BE16(key->key_data_length);
384 wpa_hexdump(MSG_DEBUG, "RSN: msg 1/4 key data", _buf, len);
385 wpa_supplicant_parse_ies(_buf, len, &ie);
386 if (ie.pmkid) {
387 wpa_hexdump(MSG_DEBUG, "RSN: PMKID from "
388 "Authenticator", ie.pmkid, PMKID_LEN);
389 }
390 }
391 #endif /* CONFIG_NO_WPA2 */
392
393 res = wpa_supplicant_get_pmk(sm, src_addr, ie.pmkid);
394 if (res == -2) {
395 wpa_printf(MSG_DEBUG, "RSN: Do not reply to msg 1/4 - "
396 "requesting full EAP authentication");
397 return;
398 }
399 if (res)
400 goto failed;
401
402 if (sm->renew_snonce) {
403 if (os_get_random(sm->snonce, WPA_NONCE_LEN)) {
404 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
405 "WPA: Failed to get random data for SNonce");
406 goto failed;
407 }
408 sm->renew_snonce = 0;
409 wpa_hexdump(MSG_DEBUG, "WPA: Renewed SNonce",
410 sm->snonce, WPA_NONCE_LEN);
411 }
412
413 /* Calculate PTK which will be stored as a temporary PTK until it has
414 * been verified when processing message 3/4. */
415 ptk = &sm->tptk;
416 wpa_derive_ptk(sm, src_addr, key, ptk);
417 /* Supplicant: swap tx/rx Mic keys */
418 os_memcpy(buf, ptk->u.auth.tx_mic_key, 8);
419 os_memcpy(ptk->u.auth.tx_mic_key, ptk->u.auth.rx_mic_key, 8);
420 os_memcpy(ptk->u.auth.rx_mic_key, buf, 8);
421 sm->tptk_set = 1;
422
423 if (wpa_supplicant_send_2_of_4(sm, sm->bssid, key, ver, sm->snonce,
424 sm->assoc_wpa_ie, sm->assoc_wpa_ie_len,
425 ptk))
426 goto failed;
427
428 os_memcpy(sm->anonce, key->key_nonce, WPA_NONCE_LEN);
429 return;
430
431 failed:
432 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED);
433 }
434
435
436 static void wpa_sm_start_preauth(void *eloop_ctx, void *timeout_ctx)
437 {
438 struct wpa_sm *sm = eloop_ctx;
439 rsn_preauth_candidate_process(sm);
440 }
441
442
443 static void wpa_supplicant_key_neg_complete(struct wpa_sm *sm,
444 const u8 *addr, int secure)
445 {
446 wpa_msg(sm->ctx->msg_ctx, MSG_INFO,
447 "WPA: Key negotiation completed with "
448 MACSTR " [PTK=%s GTK=%s]", MAC2STR(addr),
449 wpa_cipher_txt(sm->pairwise_cipher),
450 wpa_cipher_txt(sm->group_cipher));
451 wpa_sm_cancel_auth_timeout(sm);
452 wpa_sm_set_state(sm, WPA_COMPLETED);
453
454 if (secure) {
455 wpa_sm_mlme_setprotection(
456 sm, addr, MLME_SETPROTECTION_PROTECT_TYPE_RX_TX,
457 MLME_SETPROTECTION_KEY_TYPE_PAIRWISE);
458 eapol_sm_notify_portValid(sm->eapol, TRUE);
459 if (wpa_key_mgmt_wpa_psk(sm->key_mgmt))
460 eapol_sm_notify_eap_success(sm->eapol, TRUE);
461 /*
462 * Start preauthentication after a short wait to avoid a
463 * possible race condition between the data receive and key
464 * configuration after the 4-Way Handshake. This increases the
465 * likelyhood of the first preauth EAPOL-Start frame getting to
466 * the target AP.
467 */
468 eloop_register_timeout(1, 0, wpa_sm_start_preauth, sm, NULL);
469 }
470
471 if (sm->cur_pmksa && sm->cur_pmksa->opportunistic) {
472 wpa_printf(MSG_DEBUG, "RSN: Authenticator accepted "
473 "opportunistic PMKSA entry - marking it valid");
474 sm->cur_pmksa->opportunistic = 0;
475 }
476
477 #ifdef CONFIG_IEEE80211R
478 if (wpa_key_mgmt_ft(sm->key_mgmt)) {
479 /* Prepare for the next transition */
480 wpa_ft_prepare_auth_request(sm, NULL);
481 }
482 #endif /* CONFIG_IEEE80211R */
483 }
484
485
486 static void wpa_sm_rekey_ptk(void *eloop_ctx, void *timeout_ctx)
487 {
488 struct wpa_sm *sm = eloop_ctx;
489 wpa_printf(MSG_DEBUG, "WPA: Request PTK rekeying");
490 wpa_sm_key_request(sm, 0, 1);
491 }
492
493
494 static int wpa_supplicant_install_ptk(struct wpa_sm *sm,
495 const struct wpa_eapol_key *key)
496 {
497 int keylen, rsclen;
498 enum wpa_alg alg;
499 const u8 *key_rsc;
500 u8 null_rsc[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
501
502 wpa_printf(MSG_DEBUG, "WPA: Installing PTK to the driver.");
503
504 switch (sm->pairwise_cipher) {
505 case WPA_CIPHER_CCMP:
506 alg = WPA_ALG_CCMP;
507 keylen = 16;
508 rsclen = 6;
509 break;
510 case WPA_CIPHER_TKIP:
511 alg = WPA_ALG_TKIP;
512 keylen = 32;
513 rsclen = 6;
514 break;
515 case WPA_CIPHER_NONE:
516 wpa_printf(MSG_DEBUG, "WPA: Pairwise Cipher Suite: "
517 "NONE - do not use pairwise keys");
518 return 0;
519 default:
520 wpa_printf(MSG_WARNING, "WPA: Unsupported pairwise cipher %d",
521 sm->pairwise_cipher);
522 return -1;
523 }
524
525 if (sm->proto == WPA_PROTO_RSN) {
526 key_rsc = null_rsc;
527 } else {
528 key_rsc = key->key_rsc;
529 wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, rsclen);
530 }
531
532 if (wpa_sm_set_key(sm, alg, sm->bssid, 0, 1, key_rsc, rsclen,
533 (u8 *) sm->ptk.tk1, keylen) < 0) {
534 wpa_printf(MSG_WARNING, "WPA: Failed to set PTK to the "
535 "driver (alg=%d keylen=%d bssid=" MACSTR ")",
536 alg, keylen, MAC2STR(sm->bssid));
537 return -1;
538 }
539
540 if (sm->wpa_ptk_rekey) {
541 eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL);
542 eloop_register_timeout(sm->wpa_ptk_rekey, 0, wpa_sm_rekey_ptk,
543 sm, NULL);
544 }
545
546 return 0;
547 }
548
549
550 static int wpa_supplicant_check_group_cipher(int group_cipher,
551 int keylen, int maxkeylen,
552 int *key_rsc_len,
553 enum wpa_alg *alg)
554 {
555 int ret = 0;
556
557 switch (group_cipher) {
558 case WPA_CIPHER_CCMP:
559 if (keylen != 16 || maxkeylen < 16) {
560 ret = -1;
561 break;
562 }
563 *key_rsc_len = 6;
564 *alg = WPA_ALG_CCMP;
565 break;
566 case WPA_CIPHER_TKIP:
567 if (keylen != 32 || maxkeylen < 32) {
568 ret = -1;
569 break;
570 }
571 *key_rsc_len = 6;
572 *alg = WPA_ALG_TKIP;
573 break;
574 case WPA_CIPHER_WEP104:
575 if (keylen != 13 || maxkeylen < 13) {
576 ret = -1;
577 break;
578 }
579 *key_rsc_len = 0;
580 *alg = WPA_ALG_WEP;
581 break;
582 case WPA_CIPHER_WEP40:
583 if (keylen != 5 || maxkeylen < 5) {
584 ret = -1;
585 break;
586 }
587 *key_rsc_len = 0;
588 *alg = WPA_ALG_WEP;
589 break;
590 default:
591 wpa_printf(MSG_WARNING, "WPA: Unsupported Group Cipher %d",
592 group_cipher);
593 return -1;
594 }
595
596 if (ret < 0 ) {
597 wpa_printf(MSG_WARNING, "WPA: Unsupported %s Group Cipher key "
598 "length %d (%d).",
599 wpa_cipher_txt(group_cipher), keylen, maxkeylen);
600 }
601
602 return ret;
603 }
604
605
606 struct wpa_gtk_data {
607 enum wpa_alg alg;
608 int tx, key_rsc_len, keyidx;
609 u8 gtk[32];
610 int gtk_len;
611 };
612
613
614 static int wpa_supplicant_install_gtk(struct wpa_sm *sm,
615 const struct wpa_gtk_data *gd,
616 const u8 *key_rsc)
617 {
618 const u8 *_gtk = gd->gtk;
619 u8 gtk_buf[32];
620
621 wpa_hexdump_key(MSG_DEBUG, "WPA: Group Key", gd->gtk, gd->gtk_len);
622 wpa_printf(MSG_DEBUG, "WPA: Installing GTK to the driver "
623 "(keyidx=%d tx=%d len=%d).", gd->keyidx, gd->tx,
624 gd->gtk_len);
625 wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, gd->key_rsc_len);
626 if (sm->group_cipher == WPA_CIPHER_TKIP) {
627 /* Swap Tx/Rx keys for Michael MIC */
628 os_memcpy(gtk_buf, gd->gtk, 16);
629 os_memcpy(gtk_buf + 16, gd->gtk + 24, 8);
630 os_memcpy(gtk_buf + 24, gd->gtk + 16, 8);
631 _gtk = gtk_buf;
632 }
633 if (sm->pairwise_cipher == WPA_CIPHER_NONE) {
634 if (wpa_sm_set_key(sm, gd->alg,
635 (u8 *) "\xff\xff\xff\xff\xff\xff",
636 gd->keyidx, 1, key_rsc, gd->key_rsc_len,
637 _gtk, gd->gtk_len) < 0) {
638 wpa_printf(MSG_WARNING, "WPA: Failed to set "
639 "GTK to the driver (Group only).");
640 return -1;
641 }
642 } else if (wpa_sm_set_key(sm, gd->alg,
643 (u8 *) "\xff\xff\xff\xff\xff\xff",
644 gd->keyidx, gd->tx, key_rsc, gd->key_rsc_len,
645 _gtk, gd->gtk_len) < 0) {
646 wpa_printf(MSG_WARNING, "WPA: Failed to set GTK to "
647 "the driver (alg=%d keylen=%d keyidx=%d)",
648 gd->alg, gd->gtk_len, gd->keyidx);
649 return -1;
650 }
651
652 return 0;
653 }
654
655
656 static int wpa_supplicant_gtk_tx_bit_workaround(const struct wpa_sm *sm,
657 int tx)
658 {
659 if (tx && sm->pairwise_cipher != WPA_CIPHER_NONE) {
660 /* Ignore Tx bit for GTK if a pairwise key is used. One AP
661 * seemed to set this bit (incorrectly, since Tx is only when
662 * doing Group Key only APs) and without this workaround, the
663 * data connection does not work because wpa_supplicant
664 * configured non-zero keyidx to be used for unicast. */
665 wpa_printf(MSG_INFO, "WPA: Tx bit set for GTK, but pairwise "
666 "keys are used - ignore Tx bit");
667 return 0;
668 }
669 return tx;
670 }
671
672
673 static int wpa_supplicant_pairwise_gtk(struct wpa_sm *sm,
674 const struct wpa_eapol_key *key,
675 const u8 *gtk, size_t gtk_len,
676 int key_info)
677 {
678 #ifndef CONFIG_NO_WPA2
679 struct wpa_gtk_data gd;
680
681 /*
682 * IEEE Std 802.11i-2004 - 8.5.2 EAPOL-Key frames - Figure 43x
683 * GTK KDE format:
684 * KeyID[bits 0-1], Tx [bit 2], Reserved [bits 3-7]
685 * Reserved [bits 0-7]
686 * GTK
687 */
688
689 os_memset(&gd, 0, sizeof(gd));
690 wpa_hexdump_key(MSG_DEBUG, "RSN: received GTK in pairwise handshake",
691 gtk, gtk_len);
692
693 if (gtk_len < 2 || gtk_len - 2 > sizeof(gd.gtk))
694 return -1;
695
696 gd.keyidx = gtk[0] & 0x3;
697 gd.tx = wpa_supplicant_gtk_tx_bit_workaround(sm,
698 !!(gtk[0] & BIT(2)));
699 gtk += 2;
700 gtk_len -= 2;
701
702 os_memcpy(gd.gtk, gtk, gtk_len);
703 gd.gtk_len = gtk_len;
704
705 if (wpa_supplicant_check_group_cipher(sm->group_cipher,
706 gtk_len, gtk_len,
707 &gd.key_rsc_len, &gd.alg) ||
708 wpa_supplicant_install_gtk(sm, &gd, key->key_rsc)) {
709 wpa_printf(MSG_DEBUG, "RSN: Failed to install GTK");
710 return -1;
711 }
712
713 wpa_supplicant_key_neg_complete(sm, sm->bssid,
714 key_info & WPA_KEY_INFO_SECURE);
715 return 0;
716 #else /* CONFIG_NO_WPA2 */
717 return -1;
718 #endif /* CONFIG_NO_WPA2 */
719 }
720
721
722 static int ieee80211w_set_keys(struct wpa_sm *sm,
723 struct wpa_eapol_ie_parse *ie)
724 {
725 #ifdef CONFIG_IEEE80211W
726 if (sm->mgmt_group_cipher != WPA_CIPHER_AES_128_CMAC)
727 return 0;
728
729 if (ie->igtk) {
730 const struct wpa_igtk_kde *igtk;
731 u16 keyidx;
732 if (ie->igtk_len != sizeof(*igtk))
733 return -1;
734 igtk = (const struct wpa_igtk_kde *) ie->igtk;
735 keyidx = WPA_GET_LE16(igtk->keyid);
736 wpa_printf(MSG_DEBUG, "WPA: IGTK keyid %d "
737 "pn %02x%02x%02x%02x%02x%02x",
738 keyidx, MAC2STR(igtk->pn));
739 wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK",
740 igtk->igtk, WPA_IGTK_LEN);
741 if (keyidx > 4095) {
742 wpa_printf(MSG_WARNING, "WPA: Invalid IGTK KeyID %d",
743 keyidx);
744 return -1;
745 }
746 if (wpa_sm_set_key(sm, WPA_ALG_IGTK,
747 (u8 *) "\xff\xff\xff\xff\xff\xff",
748 keyidx, 0, igtk->pn, sizeof(igtk->pn),
749 igtk->igtk, WPA_IGTK_LEN) < 0) {
750 wpa_printf(MSG_WARNING, "WPA: Failed to configure IGTK"
751 " to the driver");
752 return -1;
753 }
754 }
755
756 return 0;
757 #else /* CONFIG_IEEE80211W */
758 return 0;
759 #endif /* CONFIG_IEEE80211W */
760 }
761
762
763 static void wpa_report_ie_mismatch(struct wpa_sm *sm,
764 const char *reason, const u8 *src_addr,
765 const u8 *wpa_ie, size_t wpa_ie_len,
766 const u8 *rsn_ie, size_t rsn_ie_len)
767 {
768 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, "WPA: %s (src=" MACSTR ")",
769 reason, MAC2STR(src_addr));
770
771 if (sm->ap_wpa_ie) {
772 wpa_hexdump(MSG_INFO, "WPA: WPA IE in Beacon/ProbeResp",
773 sm->ap_wpa_ie, sm->ap_wpa_ie_len);
774 }
775 if (wpa_ie) {
776 if (!sm->ap_wpa_ie) {
777 wpa_printf(MSG_INFO, "WPA: No WPA IE in "
778 "Beacon/ProbeResp");
779 }
780 wpa_hexdump(MSG_INFO, "WPA: WPA IE in 3/4 msg",
781 wpa_ie, wpa_ie_len);
782 }
783
784 if (sm->ap_rsn_ie) {
785 wpa_hexdump(MSG_INFO, "WPA: RSN IE in Beacon/ProbeResp",
786 sm->ap_rsn_ie, sm->ap_rsn_ie_len);
787 }
788 if (rsn_ie) {
789 if (!sm->ap_rsn_ie) {
790 wpa_printf(MSG_INFO, "WPA: No RSN IE in "
791 "Beacon/ProbeResp");
792 }
793 wpa_hexdump(MSG_INFO, "WPA: RSN IE in 3/4 msg",
794 rsn_ie, rsn_ie_len);
795 }
796
797 wpa_sm_disassociate(sm, WLAN_REASON_IE_IN_4WAY_DIFFERS);
798 }
799
800
801 #ifdef CONFIG_IEEE80211R
802
803 static int ft_validate_mdie(struct wpa_sm *sm,
804 const unsigned char *src_addr,
805 struct wpa_eapol_ie_parse *ie,
806 const u8 *assoc_resp_mdie)
807 {
808 struct rsn_mdie *mdie;
809
810 mdie = (struct rsn_mdie *) (ie->mdie + 2);
811 if (ie->mdie == NULL || ie->mdie_len < 2 + sizeof(*mdie) ||
812 os_memcmp(mdie->mobility_domain, sm->mobility_domain,
813 MOBILITY_DOMAIN_ID_LEN) != 0) {
814 wpa_printf(MSG_DEBUG, "FT: MDIE in msg 3/4 did not "
815 "match with the current mobility domain");
816 return -1;
817 }
818
819 if (assoc_resp_mdie &&
820 (assoc_resp_mdie[1] != ie->mdie[1] ||
821 os_memcmp(assoc_resp_mdie, ie->mdie, 2 + ie->mdie[1]) != 0)) {
822 wpa_printf(MSG_DEBUG, "FT: MDIE mismatch");
823 wpa_hexdump(MSG_DEBUG, "FT: MDIE in EAPOL-Key msg 3/4",
824 ie->mdie, 2 + ie->mdie[1]);
825 wpa_hexdump(MSG_DEBUG, "FT: MDIE in (Re)Association Response",
826 assoc_resp_mdie, 2 + assoc_resp_mdie[1]);
827 return -1;
828 }
829
830 return 0;
831 }
832
833
834 static int ft_validate_ftie(struct wpa_sm *sm,
835 const unsigned char *src_addr,
836 struct wpa_eapol_ie_parse *ie,
837 const u8 *assoc_resp_ftie)
838 {
839 if (ie->ftie == NULL) {
840 wpa_printf(MSG_DEBUG, "FT: No FTIE in EAPOL-Key msg 3/4");
841 return -1;
842 }
843
844 if (assoc_resp_ftie == NULL)
845 return 0;
846
847 if (assoc_resp_ftie[1] != ie->ftie[1] ||
848 os_memcmp(assoc_resp_ftie, ie->ftie, 2 + ie->ftie[1]) != 0) {
849 wpa_printf(MSG_DEBUG, "FT: FTIE mismatch");
850 wpa_hexdump(MSG_DEBUG, "FT: FTIE in EAPOL-Key msg 3/4",
851 ie->ftie, 2 + ie->ftie[1]);
852 wpa_hexdump(MSG_DEBUG, "FT: FTIE in (Re)Association Response",
853 assoc_resp_ftie, 2 + assoc_resp_ftie[1]);
854 return -1;
855 }
856
857 return 0;
858 }
859
860
861 static int ft_validate_rsnie(struct wpa_sm *sm,
862 const unsigned char *src_addr,
863 struct wpa_eapol_ie_parse *ie)
864 {
865 struct wpa_ie_data rsn;
866
867 if (!ie->rsn_ie)
868 return 0;
869
870 /*
871 * Verify that PMKR1Name from EAPOL-Key message 3/4
872 * matches with the value we derived.
873 */
874 if (wpa_parse_wpa_ie_rsn(ie->rsn_ie, ie->rsn_ie_len, &rsn) < 0 ||
875 rsn.num_pmkid != 1 || rsn.pmkid == NULL) {
876 wpa_printf(MSG_DEBUG, "FT: No PMKR1Name in "
877 "FT 4-way handshake message 3/4");
878 return -1;
879 }
880
881 if (os_memcmp(rsn.pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN) != 0) {
882 wpa_printf(MSG_DEBUG, "FT: PMKR1Name mismatch in "
883 "FT 4-way handshake message 3/4");
884 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name from Authenticator",
885 rsn.pmkid, WPA_PMK_NAME_LEN);
886 wpa_hexdump(MSG_DEBUG, "FT: Derived PMKR1Name",
887 sm->pmk_r1_name, WPA_PMK_NAME_LEN);
888 return -1;
889 }
890
891 return 0;
892 }
893
894
895 static int wpa_supplicant_validate_ie_ft(struct wpa_sm *sm,
896 const unsigned char *src_addr,
897 struct wpa_eapol_ie_parse *ie)
898 {
899 const u8 *pos, *end, *mdie = NULL, *ftie = NULL;
900
901 if (sm->assoc_resp_ies) {
902 pos = sm->assoc_resp_ies;
903 end = pos + sm->assoc_resp_ies_len;
904 while (pos + 2 < end) {
905 if (pos + 2 + pos[1] > end)
906 break;
907 switch (*pos) {
908 case WLAN_EID_MOBILITY_DOMAIN:
909 mdie = pos;
910 break;
911 case WLAN_EID_FAST_BSS_TRANSITION:
912 ftie = pos;
913 break;
914 }
915 pos += 2 + pos[1];
916 }
917 }
918
919 if (ft_validate_mdie(sm, src_addr, ie, mdie) < 0 ||
920 ft_validate_ftie(sm, src_addr, ie, ftie) < 0 ||
921 ft_validate_rsnie(sm, src_addr, ie) < 0)
922 return -1;
923
924 return 0;
925 }
926
927 #endif /* CONFIG_IEEE80211R */
928
929
930 static int wpa_supplicant_validate_ie(struct wpa_sm *sm,
931 const unsigned char *src_addr,
932 struct wpa_eapol_ie_parse *ie)
933 {
934 if (sm->ap_wpa_ie == NULL && sm->ap_rsn_ie == NULL) {
935 wpa_printf(MSG_DEBUG, "WPA: No WPA/RSN IE for this AP known. "
936 "Trying to get from scan results");
937 if (wpa_sm_get_beacon_ie(sm) < 0) {
938 wpa_printf(MSG_WARNING, "WPA: Could not find AP from "
939 "the scan results");
940 } else {
941 wpa_printf(MSG_DEBUG, "WPA: Found the current AP from "
942 "updated scan results");
943 }
944 }
945
946 if (ie->wpa_ie == NULL && ie->rsn_ie == NULL &&
947 (sm->ap_wpa_ie || sm->ap_rsn_ie)) {
948 wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match "
949 "with IE in Beacon/ProbeResp (no IE?)",
950 src_addr, ie->wpa_ie, ie->wpa_ie_len,
951 ie->rsn_ie, ie->rsn_ie_len);
952 return -1;
953 }
954
955 if ((ie->wpa_ie && sm->ap_wpa_ie &&
956 (ie->wpa_ie_len != sm->ap_wpa_ie_len ||
957 os_memcmp(ie->wpa_ie, sm->ap_wpa_ie, ie->wpa_ie_len) != 0)) ||
958 (ie->rsn_ie && sm->ap_rsn_ie &&
959 wpa_compare_rsn_ie(wpa_key_mgmt_ft(sm->key_mgmt),
960 sm->ap_rsn_ie, sm->ap_rsn_ie_len,
961 ie->rsn_ie, ie->rsn_ie_len))) {
962 wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match "
963 "with IE in Beacon/ProbeResp",
964 src_addr, ie->wpa_ie, ie->wpa_ie_len,
965 ie->rsn_ie, ie->rsn_ie_len);
966 return -1;
967 }
968
969 if (sm->proto == WPA_PROTO_WPA &&
970 ie->rsn_ie && sm->ap_rsn_ie == NULL && sm->rsn_enabled) {
971 wpa_report_ie_mismatch(sm, "Possible downgrade attack "
972 "detected - RSN was enabled and RSN IE "
973 "was in msg 3/4, but not in "
974 "Beacon/ProbeResp",
975 src_addr, ie->wpa_ie, ie->wpa_ie_len,
976 ie->rsn_ie, ie->rsn_ie_len);
977 return -1;
978 }
979
980 #ifdef CONFIG_IEEE80211R
981 if (wpa_key_mgmt_ft(sm->key_mgmt) &&
982 wpa_supplicant_validate_ie_ft(sm, src_addr, ie) < 0)
983 return -1;
984 #endif /* CONFIG_IEEE80211R */
985
986 return 0;
987 }
988
989
990 /**
991 * wpa_supplicant_send_4_of_4 - Send message 4 of WPA/RSN 4-Way Handshake
992 * @sm: Pointer to WPA state machine data from wpa_sm_init()
993 * @dst: Destination address for the frame
994 * @key: Pointer to the EAPOL-Key frame header
995 * @ver: Version bits from EAPOL-Key Key Info
996 * @key_info: Key Info
997 * @kde: KDEs to include the EAPOL-Key frame
998 * @kde_len: Length of KDEs
999 * @ptk: PTK to use for keyed hash and encryption
1000 * Returns: 0 on success, -1 on failure
1001 */
1002 int wpa_supplicant_send_4_of_4(struct wpa_sm *sm, const unsigned char *dst,
1003 const struct wpa_eapol_key *key,
1004 u16 ver, u16 key_info,
1005 const u8 *kde, size_t kde_len,
1006 struct wpa_ptk *ptk)
1007 {
1008 size_t rlen;
1009 struct wpa_eapol_key *reply;
1010 u8 *rbuf;
1011
1012 if (kde)
1013 wpa_hexdump(MSG_DEBUG, "WPA: KDE for msg 4/4", kde, kde_len);
1014
1015 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL,
1016 sizeof(*reply) + kde_len,
1017 &rlen, (void *) &reply);
1018 if (rbuf == NULL)
1019 return -1;
1020
1021 reply->type = sm->proto == WPA_PROTO_RSN ?
1022 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
1023 key_info &= WPA_KEY_INFO_SECURE;
1024 key_info |= ver | WPA_KEY_INFO_KEY_TYPE | WPA_KEY_INFO_MIC;
1025 WPA_PUT_BE16(reply->key_info, key_info);
1026 if (sm->proto == WPA_PROTO_RSN)
1027 WPA_PUT_BE16(reply->key_length, 0);
1028 else
1029 os_memcpy(reply->key_length, key->key_length, 2);
1030 os_memcpy(reply->replay_counter, key->replay_counter,
1031 WPA_REPLAY_COUNTER_LEN);
1032
1033 WPA_PUT_BE16(reply->key_data_length, kde_len);
1034 if (kde)
1035 os_memcpy(reply + 1, kde, kde_len);
1036
1037 wpa_printf(MSG_DEBUG, "WPA: Sending EAPOL-Key 4/4");
1038 wpa_eapol_key_send(sm, ptk->kck, ver, dst, ETH_P_EAPOL,
1039 rbuf, rlen, reply->key_mic);
1040
1041 return 0;
1042 }
1043
1044
1045 static void wpa_supplicant_process_3_of_4(struct wpa_sm *sm,
1046 const struct wpa_eapol_key *key,
1047 u16 ver)
1048 {
1049 u16 key_info, keylen, len;
1050 const u8 *pos;
1051 struct wpa_eapol_ie_parse ie;
1052
1053 wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE);
1054 wpa_printf(MSG_DEBUG, "WPA: RX message 3 of 4-Way Handshake from "
1055 MACSTR " (ver=%d)", MAC2STR(sm->bssid), ver);
1056
1057 key_info = WPA_GET_BE16(key->key_info);
1058
1059 pos = (const u8 *) (key + 1);
1060 len = WPA_GET_BE16(key->key_data_length);
1061 wpa_hexdump(MSG_DEBUG, "WPA: IE KeyData", pos, len);
1062 wpa_supplicant_parse_ies(pos, len, &ie);
1063 if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
1064 wpa_printf(MSG_WARNING, "WPA: GTK IE in unencrypted key data");
1065 goto failed;
1066 }
1067 #ifdef CONFIG_IEEE80211W
1068 if (ie.igtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
1069 wpa_printf(MSG_WARNING, "WPA: IGTK KDE in unencrypted key "
1070 "data");
1071 goto failed;
1072 }
1073
1074 if (ie.igtk && ie.igtk_len != sizeof(struct wpa_igtk_kde)) {
1075 wpa_printf(MSG_WARNING, "WPA: Invalid IGTK KDE length %lu",
1076 (unsigned long) ie.igtk_len);
1077 goto failed;
1078 }
1079 #endif /* CONFIG_IEEE80211W */
1080
1081 if (wpa_supplicant_validate_ie(sm, sm->bssid, &ie) < 0)
1082 goto failed;
1083
1084 if (os_memcmp(sm->anonce, key->key_nonce, WPA_NONCE_LEN) != 0) {
1085 wpa_printf(MSG_WARNING, "WPA: ANonce from message 1 of 4-Way "
1086 "Handshake differs from 3 of 4-Way Handshake - drop"
1087 " packet (src=" MACSTR ")", MAC2STR(sm->bssid));
1088 goto failed;
1089 }
1090
1091 keylen = WPA_GET_BE16(key->key_length);
1092 switch (sm->pairwise_cipher) {
1093 case WPA_CIPHER_CCMP:
1094 if (keylen != 16) {
1095 wpa_printf(MSG_WARNING, "WPA: Invalid CCMP key length "
1096 "%d (src=" MACSTR ")",
1097 keylen, MAC2STR(sm->bssid));
1098 goto failed;
1099 }
1100 break;
1101 case WPA_CIPHER_TKIP:
1102 if (keylen != 32) {
1103 wpa_printf(MSG_WARNING, "WPA: Invalid TKIP key length "
1104 "%d (src=" MACSTR ")",
1105 keylen, MAC2STR(sm->bssid));
1106 goto failed;
1107 }
1108 break;
1109 }
1110
1111 if (wpa_supplicant_send_4_of_4(sm, sm->bssid, key, ver, key_info,
1112 NULL, 0, &sm->ptk)) {
1113 goto failed;
1114 }
1115
1116 /* SNonce was successfully used in msg 3/4, so mark it to be renewed
1117 * for the next 4-Way Handshake. If msg 3 is received again, the old
1118 * SNonce will still be used to avoid changing PTK. */
1119 sm->renew_snonce = 1;
1120
1121 if (key_info & WPA_KEY_INFO_INSTALL) {
1122 if (wpa_supplicant_install_ptk(sm, key))
1123 goto failed;
1124 }
1125
1126 if (key_info & WPA_KEY_INFO_SECURE) {
1127 wpa_sm_mlme_setprotection(
1128 sm, sm->bssid, MLME_SETPROTECTION_PROTECT_TYPE_RX,
1129 MLME_SETPROTECTION_KEY_TYPE_PAIRWISE);
1130 eapol_sm_notify_portValid(sm->eapol, TRUE);
1131 }
1132 wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE);
1133
1134 if (ie.gtk &&
1135 wpa_supplicant_pairwise_gtk(sm, key,
1136 ie.gtk, ie.gtk_len, key_info) < 0) {
1137 wpa_printf(MSG_INFO, "RSN: Failed to configure GTK");
1138 goto failed;
1139 }
1140
1141 if (ieee80211w_set_keys(sm, &ie) < 0) {
1142 wpa_printf(MSG_INFO, "RSN: Failed to configure IGTK");
1143 goto failed;
1144 }
1145
1146 return;
1147
1148 failed:
1149 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED);
1150 }
1151
1152
1153 static int wpa_supplicant_process_1_of_2_rsn(struct wpa_sm *sm,
1154 const u8 *keydata,
1155 size_t keydatalen,
1156 u16 key_info,
1157 struct wpa_gtk_data *gd)
1158 {
1159 int maxkeylen;
1160 struct wpa_eapol_ie_parse ie;
1161
1162 wpa_hexdump(MSG_DEBUG, "RSN: msg 1/2 key data", keydata, keydatalen);
1163 wpa_supplicant_parse_ies(keydata, keydatalen, &ie);
1164 if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
1165 wpa_printf(MSG_WARNING, "WPA: GTK IE in unencrypted key data");
1166 return -1;
1167 }
1168 if (ie.gtk == NULL) {
1169 wpa_printf(MSG_INFO, "WPA: No GTK IE in Group Key msg 1/2");
1170 return -1;
1171 }
1172 maxkeylen = gd->gtk_len = ie.gtk_len - 2;
1173
1174 if (wpa_supplicant_check_group_cipher(sm->group_cipher,
1175 gd->gtk_len, maxkeylen,
1176 &gd->key_rsc_len, &gd->alg))
1177 return -1;
1178
1179 wpa_hexdump(MSG_DEBUG, "RSN: received GTK in group key handshake",
1180 ie.gtk, ie.gtk_len);
1181 gd->keyidx = ie.gtk[0] & 0x3;
1182 gd->tx = wpa_supplicant_gtk_tx_bit_workaround(sm,
1183 !!(ie.gtk[0] & BIT(2)));
1184 if (ie.gtk_len - 2 > sizeof(gd->gtk)) {
1185 wpa_printf(MSG_INFO, "RSN: Too long GTK in GTK IE "
1186 "(len=%lu)", (unsigned long) ie.gtk_len - 2);
1187 return -1;
1188 }
1189 os_memcpy(gd->gtk, ie.gtk + 2, ie.gtk_len - 2);
1190
1191 if (ieee80211w_set_keys(sm, &ie) < 0)
1192 wpa_printf(MSG_INFO, "RSN: Failed to configure IGTK");
1193
1194 return 0;
1195 }
1196
1197
1198 static int wpa_supplicant_process_1_of_2_wpa(struct wpa_sm *sm,
1199 const struct wpa_eapol_key *key,
1200 size_t keydatalen, int key_info,
1201 size_t extra_len, u16 ver,
1202 struct wpa_gtk_data *gd)
1203 {
1204 size_t maxkeylen;
1205 u8 ek[32];
1206
1207 gd->gtk_len = WPA_GET_BE16(key->key_length);
1208 maxkeylen = keydatalen;
1209 if (keydatalen > extra_len) {
1210 wpa_printf(MSG_INFO, "WPA: Truncated EAPOL-Key packet:"
1211 " key_data_length=%lu > extra_len=%lu",
1212 (unsigned long) keydatalen,
1213 (unsigned long) extra_len);
1214 return -1;
1215 }
1216 if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
1217 if (maxkeylen < 8) {
1218 wpa_printf(MSG_INFO, "WPA: Too short maxkeylen (%lu)",
1219 (unsigned long) maxkeylen);
1220 return -1;
1221 }
1222 maxkeylen -= 8;
1223 }
1224
1225 if (wpa_supplicant_check_group_cipher(sm->group_cipher,
1226 gd->gtk_len, maxkeylen,
1227 &gd->key_rsc_len, &gd->alg))
1228 return -1;
1229
1230 gd->keyidx = (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >>
1231 WPA_KEY_INFO_KEY_INDEX_SHIFT;
1232 if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4) {
1233 os_memcpy(ek, key->key_iv, 16);
1234 os_memcpy(ek + 16, sm->ptk.kek, 16);
1235 if (keydatalen > sizeof(gd->gtk)) {
1236 wpa_printf(MSG_WARNING, "WPA: RC4 key data "
1237 "too long (%lu)",
1238 (unsigned long) keydatalen);
1239 return -1;
1240 }
1241 os_memcpy(gd->gtk, key + 1, keydatalen);
1242 if (rc4_skip(ek, 32, 256, gd->gtk, keydatalen)) {
1243 wpa_printf(MSG_ERROR, "WPA: RC4 failed");
1244 return -1;
1245 }
1246 } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
1247 if (keydatalen % 8) {
1248 wpa_printf(MSG_WARNING, "WPA: Unsupported AES-WRAP "
1249 "len %lu", (unsigned long) keydatalen);
1250 return -1;
1251 }
1252 if (maxkeylen > sizeof(gd->gtk)) {
1253 wpa_printf(MSG_WARNING, "WPA: AES-WRAP key data "
1254 "too long (keydatalen=%lu maxkeylen=%lu)",
1255 (unsigned long) keydatalen,
1256 (unsigned long) maxkeylen);
1257 return -1;
1258 }
1259 if (aes_unwrap(sm->ptk.kek, maxkeylen / 8,
1260 (const u8 *) (key + 1), gd->gtk)) {
1261 wpa_printf(MSG_WARNING, "WPA: AES unwrap "
1262 "failed - could not decrypt GTK");
1263 return -1;
1264 }
1265 } else {
1266 wpa_printf(MSG_WARNING, "WPA: Unsupported key_info type %d",
1267 ver);
1268 return -1;
1269 }
1270 gd->tx = wpa_supplicant_gtk_tx_bit_workaround(
1271 sm, !!(key_info & WPA_KEY_INFO_TXRX));
1272 return 0;
1273 }
1274
1275
1276 static int wpa_supplicant_send_2_of_2(struct wpa_sm *sm,
1277 const struct wpa_eapol_key *key,
1278 int ver, u16 key_info)
1279 {
1280 size_t rlen;
1281 struct wpa_eapol_key *reply;
1282 u8 *rbuf;
1283
1284 rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL,
1285 sizeof(*reply), &rlen, (void *) &reply);
1286 if (rbuf == NULL)
1287 return -1;
1288
1289 reply->type = sm->proto == WPA_PROTO_RSN ?
1290 EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
1291 key_info &= WPA_KEY_INFO_KEY_INDEX_MASK;
1292 key_info |= ver | WPA_KEY_INFO_MIC | WPA_KEY_INFO_SECURE;
1293 WPA_PUT_BE16(reply->key_info, key_info);
1294 if (sm->proto == WPA_PROTO_RSN)
1295 WPA_PUT_BE16(reply->key_length, 0);
1296 else
1297 os_memcpy(reply->key_length, key->key_length, 2);
1298 os_memcpy(reply->replay_counter, key->replay_counter,
1299 WPA_REPLAY_COUNTER_LEN);
1300
1301 WPA_PUT_BE16(reply->key_data_length, 0);
1302
1303 wpa_printf(MSG_DEBUG, "WPA: Sending EAPOL-Key 2/2");
1304 wpa_eapol_key_send(sm, sm->ptk.kck, ver, sm->bssid, ETH_P_EAPOL,
1305 rbuf, rlen, reply->key_mic);
1306
1307 return 0;
1308 }
1309
1310
1311 static void wpa_supplicant_process_1_of_2(struct wpa_sm *sm,
1312 const unsigned char *src_addr,
1313 const struct wpa_eapol_key *key,
1314 int extra_len, u16 ver)
1315 {
1316 u16 key_info, keydatalen;
1317 int rekey, ret;
1318 struct wpa_gtk_data gd;
1319
1320 os_memset(&gd, 0, sizeof(gd));
1321
1322 rekey = wpa_sm_get_state(sm) == WPA_COMPLETED;
1323 wpa_printf(MSG_DEBUG, "WPA: RX message 1 of Group Key Handshake from "
1324 MACSTR " (ver=%d)", MAC2STR(src_addr), ver);
1325
1326 key_info = WPA_GET_BE16(key->key_info);
1327 keydatalen = WPA_GET_BE16(key->key_data_length);
1328
1329 if (sm->proto == WPA_PROTO_RSN) {
1330 ret = wpa_supplicant_process_1_of_2_rsn(sm,
1331 (const u8 *) (key + 1),
1332 keydatalen, key_info,
1333 &gd);
1334 } else {
1335 ret = wpa_supplicant_process_1_of_2_wpa(sm, key, keydatalen,
1336 key_info, extra_len,
1337 ver, &gd);
1338 }
1339
1340 wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE);
1341
1342 if (ret)
1343 goto failed;
1344
1345 if (wpa_supplicant_install_gtk(sm, &gd, key->key_rsc) ||
1346 wpa_supplicant_send_2_of_2(sm, key, ver, key_info))
1347 goto failed;
1348
1349 if (rekey) {
1350 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Group rekeying "
1351 "completed with " MACSTR " [GTK=%s]",
1352 MAC2STR(sm->bssid), wpa_cipher_txt(sm->group_cipher));
1353 wpa_sm_cancel_auth_timeout(sm);
1354 wpa_sm_set_state(sm, WPA_COMPLETED);
1355 } else {
1356 wpa_supplicant_key_neg_complete(sm, sm->bssid,
1357 key_info &
1358 WPA_KEY_INFO_SECURE);
1359 }
1360 return;
1361
1362 failed:
1363 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED);
1364 }
1365
1366
1367 static int wpa_supplicant_verify_eapol_key_mic(struct wpa_sm *sm,
1368 struct wpa_eapol_key *key,
1369 u16 ver,
1370 const u8 *buf, size_t len)
1371 {
1372 u8 mic[16];
1373 int ok = 0;
1374
1375 os_memcpy(mic, key->key_mic, 16);
1376 if (sm->tptk_set) {
1377 os_memset(key->key_mic, 0, 16);
1378 wpa_eapol_key_mic(sm->tptk.kck, ver, buf, len,
1379 key->key_mic);
1380 if (os_memcmp(mic, key->key_mic, 16) != 0) {
1381 wpa_printf(MSG_WARNING, "WPA: Invalid EAPOL-Key MIC "
1382 "when using TPTK - ignoring TPTK");
1383 } else {
1384 ok = 1;
1385 sm->tptk_set = 0;
1386 sm->ptk_set = 1;
1387 os_memcpy(&sm->ptk, &sm->tptk, sizeof(sm->ptk));
1388 }
1389 }
1390
1391 if (!ok && sm->ptk_set) {
1392 os_memset(key->key_mic, 0, 16);
1393 wpa_eapol_key_mic(sm->ptk.kck, ver, buf, len,
1394 key->key_mic);
1395 if (os_memcmp(mic, key->key_mic, 16) != 0) {
1396 wpa_printf(MSG_WARNING, "WPA: Invalid EAPOL-Key MIC "
1397 "- dropping packet");
1398 return -1;
1399 }
1400 ok = 1;
1401 }
1402
1403 if (!ok) {
1404 wpa_printf(MSG_WARNING, "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) */
1417 static 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_printf(MSG_WARNING, "WPA: PTK not available, "
1426 "cannot decrypt EAPOL-Key key data.");
1427 return -1;
1428 }
1429
1430 /* Decrypt key data here so that this operation does not need
1431 * to be implemented separately for each message type. */
1432 if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4) {
1433 u8 ek[32];
1434 os_memcpy(ek, key->key_iv, 16);
1435 os_memcpy(ek + 16, sm->ptk.kek, 16);
1436 if (rc4_skip(ek, 32, 256, (u8 *) (key + 1), keydatalen)) {
1437 wpa_printf(MSG_ERROR, "WPA: RC4 failed");
1438 return -1;
1439 }
1440 } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
1441 ver == WPA_KEY_INFO_TYPE_AES_128_CMAC) {
1442 u8 *buf;
1443 if (keydatalen % 8) {
1444 wpa_printf(MSG_WARNING, "WPA: Unsupported "
1445 "AES-WRAP len %d", keydatalen);
1446 return -1;
1447 }
1448 keydatalen -= 8; /* AES-WRAP adds 8 bytes */
1449 buf = os_malloc(keydatalen);
1450 if (buf == NULL) {
1451 wpa_printf(MSG_WARNING, "WPA: No memory for "
1452 "AES-UNWRAP buffer");
1453 return -1;
1454 }
1455 if (aes_unwrap(sm->ptk.kek, keydatalen / 8,
1456 (u8 *) (key + 1), buf)) {
1457 os_free(buf);
1458 wpa_printf(MSG_WARNING, "WPA: AES unwrap failed - "
1459 "could not decrypt EAPOL-Key key data");
1460 return -1;
1461 }
1462 os_memcpy(key + 1, buf, keydatalen);
1463 os_free(buf);
1464 WPA_PUT_BE16(key->key_data_length, keydatalen);
1465 } else {
1466 wpa_printf(MSG_WARNING, "WPA: Unsupported key_info type %d",
1467 ver);
1468 return -1;
1469 }
1470 wpa_hexdump_key(MSG_DEBUG, "WPA: decrypted EAPOL-Key key data",
1471 (u8 *) (key + 1), keydatalen);
1472 return 0;
1473 }
1474
1475
1476 /**
1477 * wpa_sm_aborted_cached - Notify WPA that PMKSA caching was aborted
1478 * @sm: Pointer to WPA state machine data from wpa_sm_init()
1479 */
1480 void wpa_sm_aborted_cached(struct wpa_sm *sm)
1481 {
1482 if (sm && sm->cur_pmksa) {
1483 wpa_printf(MSG_DEBUG, "RSN: Cancelling PMKSA caching attempt");
1484 sm->cur_pmksa = NULL;
1485 }
1486 }
1487
1488
1489 static void wpa_eapol_key_dump(const struct wpa_eapol_key *key)
1490 {
1491 #ifndef CONFIG_NO_STDOUT_DEBUG
1492 u16 key_info = WPA_GET_BE16(key->key_info);
1493
1494 wpa_printf(MSG_DEBUG, " EAPOL-Key type=%d", key->type);
1495 wpa_printf(MSG_DEBUG, " key_info 0x%x (ver=%d keyidx=%d rsvd=%d %s"
1496 "%s%s%s%s%s%s%s)",
1497 key_info, key_info & WPA_KEY_INFO_TYPE_MASK,
1498 (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >>
1499 WPA_KEY_INFO_KEY_INDEX_SHIFT,
1500 (key_info & (BIT(13) | BIT(14) | BIT(15))) >> 13,
1501 key_info & WPA_KEY_INFO_KEY_TYPE ? "Pairwise" : "Group",
1502 key_info & WPA_KEY_INFO_INSTALL ? " Install" : "",
1503 key_info & WPA_KEY_INFO_ACK ? " Ack" : "",
1504 key_info & WPA_KEY_INFO_MIC ? " MIC" : "",
1505 key_info & WPA_KEY_INFO_SECURE ? " Secure" : "",
1506 key_info & WPA_KEY_INFO_ERROR ? " Error" : "",
1507 key_info & WPA_KEY_INFO_REQUEST ? " Request" : "",
1508 key_info & WPA_KEY_INFO_ENCR_KEY_DATA ? " Encr" : "");
1509 wpa_printf(MSG_DEBUG, " key_length=%u key_data_length=%u",
1510 WPA_GET_BE16(key->key_length),
1511 WPA_GET_BE16(key->key_data_length));
1512 wpa_hexdump(MSG_DEBUG, " replay_counter",
1513 key->replay_counter, WPA_REPLAY_COUNTER_LEN);
1514 wpa_hexdump(MSG_DEBUG, " key_nonce", key->key_nonce, WPA_NONCE_LEN);
1515 wpa_hexdump(MSG_DEBUG, " key_iv", key->key_iv, 16);
1516 wpa_hexdump(MSG_DEBUG, " key_rsc", key->key_rsc, 8);
1517 wpa_hexdump(MSG_DEBUG, " key_id (reserved)", key->key_id, 8);
1518 wpa_hexdump(MSG_DEBUG, " key_mic", key->key_mic, 16);
1519 #endif /* CONFIG_NO_STDOUT_DEBUG */
1520 }
1521
1522
1523 /**
1524 * wpa_sm_rx_eapol - Process received WPA EAPOL frames
1525 * @sm: Pointer to WPA state machine data from wpa_sm_init()
1526 * @src_addr: Source MAC address of the EAPOL packet
1527 * @buf: Pointer to the beginning of the EAPOL data (EAPOL header)
1528 * @len: Length of the EAPOL frame
1529 * Returns: 1 = WPA EAPOL-Key processed, 0 = not a WPA EAPOL-Key, -1 failure
1530 *
1531 * This function is called for each received EAPOL frame. Other than EAPOL-Key
1532 * frames can be skipped if filtering is done elsewhere. wpa_sm_rx_eapol() is
1533 * only processing WPA and WPA2 EAPOL-Key frames.
1534 *
1535 * The received EAPOL-Key packets are validated and valid packets are replied
1536 * to. In addition, key material (PTK, GTK) is configured at the end of a
1537 * successful key handshake.
1538 */
1539 int wpa_sm_rx_eapol(struct wpa_sm *sm, const u8 *src_addr,
1540 const u8 *buf, size_t len)
1541 {
1542 size_t plen, data_len, extra_len;
1543 struct ieee802_1x_hdr *hdr;
1544 struct wpa_eapol_key *key;
1545 u16 key_info, ver;
1546 u8 *tmp;
1547 int ret = -1;
1548 struct wpa_peerkey *peerkey = NULL;
1549
1550 #ifdef CONFIG_IEEE80211R
1551 sm->ft_completed = 0;
1552 #endif /* CONFIG_IEEE80211R */
1553
1554 if (len < sizeof(*hdr) + sizeof(*key)) {
1555 wpa_printf(MSG_DEBUG, "WPA: EAPOL frame too short to be a WPA "
1556 "EAPOL-Key (len %lu, expecting at least %lu)",
1557 (unsigned long) len,
1558 (unsigned long) sizeof(*hdr) + sizeof(*key));
1559 return 0;
1560 }
1561
1562 tmp = os_malloc(len);
1563 if (tmp == NULL)
1564 return -1;
1565 os_memcpy(tmp, buf, len);
1566
1567 hdr = (struct ieee802_1x_hdr *) tmp;
1568 key = (struct wpa_eapol_key *) (hdr + 1);
1569 plen = be_to_host16(hdr->length);
1570 data_len = plen + sizeof(*hdr);
1571 wpa_printf(MSG_DEBUG, "IEEE 802.1X RX: version=%d type=%d length=%lu",
1572 hdr->version, hdr->type, (unsigned long) plen);
1573
1574 if (hdr->version < EAPOL_VERSION) {
1575 /* TODO: backwards compatibility */
1576 }
1577 if (hdr->type != IEEE802_1X_TYPE_EAPOL_KEY) {
1578 wpa_printf(MSG_DEBUG, "WPA: EAPOL frame (type %u) discarded, "
1579 "not a Key frame", hdr->type);
1580 ret = 0;
1581 goto out;
1582 }
1583 if (plen > len - sizeof(*hdr) || plen < sizeof(*key)) {
1584 wpa_printf(MSG_DEBUG, "WPA: EAPOL frame payload size %lu "
1585 "invalid (frame size %lu)",
1586 (unsigned long) plen, (unsigned long) len);
1587 ret = 0;
1588 goto out;
1589 }
1590
1591 if (key->type != EAPOL_KEY_TYPE_WPA && key->type != EAPOL_KEY_TYPE_RSN)
1592 {
1593 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key type (%d) unknown, "
1594 "discarded", key->type);
1595 ret = 0;
1596 goto out;
1597 }
1598 wpa_eapol_key_dump(key);
1599
1600 eapol_sm_notify_lower_layer_success(sm->eapol, 0);
1601 wpa_hexdump(MSG_MSGDUMP, "WPA: RX EAPOL-Key", tmp, len);
1602 if (data_len < len) {
1603 wpa_printf(MSG_DEBUG, "WPA: ignoring %lu bytes after the IEEE "
1604 "802.1X data", (unsigned long) len - data_len);
1605 }
1606 key_info = WPA_GET_BE16(key->key_info);
1607 ver = key_info & WPA_KEY_INFO_TYPE_MASK;
1608 if (ver != WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 &&
1609 #if defined(CONFIG_IEEE80211R) || defined(CONFIG_IEEE80211W)
1610 ver != WPA_KEY_INFO_TYPE_AES_128_CMAC &&
1611 #endif /* CONFIG_IEEE80211R || CONFIG_IEEE80211W */
1612 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
1613 wpa_printf(MSG_INFO, "WPA: Unsupported EAPOL-Key descriptor "
1614 "version %d.", ver);
1615 goto out;
1616 }
1617
1618 #ifdef CONFIG_IEEE80211R
1619 if (wpa_key_mgmt_ft(sm->key_mgmt)) {
1620 /* IEEE 802.11r uses a new key_info type (AES-128-CMAC). */
1621 if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) {
1622 wpa_printf(MSG_INFO, "FT: AP did not use "
1623 "AES-128-CMAC.");
1624 goto out;
1625 }
1626 } else
1627 #endif /* CONFIG_IEEE80211R */
1628 #ifdef CONFIG_IEEE80211W
1629 if (wpa_key_mgmt_sha256(sm->key_mgmt)) {
1630 if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) {
1631 wpa_printf(MSG_INFO, "WPA: AP did not use the "
1632 "negotiated AES-128-CMAC.");
1633 goto out;
1634 }
1635 } else
1636 #endif /* CONFIG_IEEE80211W */
1637 if (sm->pairwise_cipher == WPA_CIPHER_CCMP &&
1638 ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
1639 wpa_printf(MSG_INFO, "WPA: CCMP is used, but EAPOL-Key "
1640 "descriptor version (%d) is not 2.", ver);
1641 if (sm->group_cipher != WPA_CIPHER_CCMP &&
1642 !(key_info & WPA_KEY_INFO_KEY_TYPE)) {
1643 /* Earlier versions of IEEE 802.11i did not explicitly
1644 * require version 2 descriptor for all EAPOL-Key
1645 * packets, so allow group keys to use version 1 if
1646 * CCMP is not used for them. */
1647 wpa_printf(MSG_INFO, "WPA: Backwards compatibility: "
1648 "allow invalid version for non-CCMP group "
1649 "keys");
1650 } else
1651 goto out;
1652 }
1653
1654 #ifdef CONFIG_PEERKEY
1655 for (peerkey = sm->peerkey; peerkey; peerkey = peerkey->next) {
1656 if (os_memcmp(peerkey->addr, src_addr, ETH_ALEN) == 0)
1657 break;
1658 }
1659
1660 if (!(key_info & WPA_KEY_INFO_SMK_MESSAGE) && peerkey) {
1661 if (!peerkey->initiator && peerkey->replay_counter_set &&
1662 os_memcmp(key->replay_counter, peerkey->replay_counter,
1663 WPA_REPLAY_COUNTER_LEN) <= 0) {
1664 wpa_printf(MSG_WARNING, "RSN: EAPOL-Key Replay "
1665 "Counter did not increase (STK) - dropping "
1666 "packet");
1667 goto out;
1668 } else if (peerkey->initiator) {
1669 u8 _tmp[WPA_REPLAY_COUNTER_LEN];
1670 os_memcpy(_tmp, key->replay_counter,
1671 WPA_REPLAY_COUNTER_LEN);
1672 inc_byte_array(_tmp, WPA_REPLAY_COUNTER_LEN);
1673 if (os_memcmp(_tmp, peerkey->replay_counter,
1674 WPA_REPLAY_COUNTER_LEN) != 0) {
1675 wpa_printf(MSG_DEBUG, "RSN: EAPOL-Key Replay "
1676 "Counter did not match (STK) - "
1677 "dropping packet");
1678 goto out;
1679 }
1680 }
1681 }
1682
1683 if (peerkey && peerkey->initiator && (key_info & WPA_KEY_INFO_ACK)) {
1684 wpa_printf(MSG_INFO, "RSN: Ack bit in key_info from STK peer");
1685 goto out;
1686 }
1687 #endif /* CONFIG_PEERKEY */
1688
1689 if (!peerkey && sm->rx_replay_counter_set &&
1690 os_memcmp(key->replay_counter, sm->rx_replay_counter,
1691 WPA_REPLAY_COUNTER_LEN) <= 0) {
1692 wpa_printf(MSG_WARNING, "WPA: EAPOL-Key Replay Counter did not"
1693 " increase - dropping packet");
1694 goto out;
1695 }
1696
1697 if (!(key_info & (WPA_KEY_INFO_ACK | WPA_KEY_INFO_SMK_MESSAGE))
1698 #ifdef CONFIG_PEERKEY
1699 && (peerkey == NULL || !peerkey->initiator)
1700 #endif /* CONFIG_PEERKEY */
1701 ) {
1702 wpa_printf(MSG_INFO, "WPA: No Ack bit in key_info");
1703 goto out;
1704 }
1705
1706 if (key_info & WPA_KEY_INFO_REQUEST) {
1707 wpa_printf(MSG_INFO, "WPA: EAPOL-Key with Request bit - "
1708 "dropped");
1709 goto out;
1710 }
1711
1712 if ((key_info & WPA_KEY_INFO_MIC) && !peerkey &&
1713 wpa_supplicant_verify_eapol_key_mic(sm, key, ver, tmp, data_len))
1714 goto out;
1715
1716 #ifdef CONFIG_PEERKEY
1717 if ((key_info & WPA_KEY_INFO_MIC) && peerkey &&
1718 peerkey_verify_eapol_key_mic(sm, peerkey, key, ver, tmp, data_len))
1719 goto out;
1720 #endif /* CONFIG_PEERKEY */
1721
1722 extra_len = data_len - sizeof(*hdr) - sizeof(*key);
1723
1724 if (WPA_GET_BE16(key->key_data_length) > extra_len) {
1725 wpa_msg(sm->ctx->msg_ctx, MSG_INFO, "WPA: Invalid EAPOL-Key "
1726 "frame - key_data overflow (%d > %lu)",
1727 WPA_GET_BE16(key->key_data_length),
1728 (unsigned long) extra_len);
1729 goto out;
1730 }
1731 extra_len = WPA_GET_BE16(key->key_data_length);
1732
1733 if (sm->proto == WPA_PROTO_RSN &&
1734 (key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
1735 if (wpa_supplicant_decrypt_key_data(sm, key, ver))
1736 goto out;
1737 extra_len = WPA_GET_BE16(key->key_data_length);
1738 }
1739
1740 if (key_info & WPA_KEY_INFO_KEY_TYPE) {
1741 if (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) {
1742 wpa_printf(MSG_WARNING, "WPA: Ignored EAPOL-Key "
1743 "(Pairwise) with non-zero key index");
1744 goto out;
1745 }
1746 if (peerkey) {
1747 /* PeerKey 4-Way Handshake */
1748 peerkey_rx_eapol_4way(sm, peerkey, key, key_info, ver);
1749 } else if (key_info & WPA_KEY_INFO_MIC) {
1750 /* 3/4 4-Way Handshake */
1751 wpa_supplicant_process_3_of_4(sm, key, ver);
1752 } else {
1753 /* 1/4 4-Way Handshake */
1754 wpa_supplicant_process_1_of_4(sm, src_addr, key,
1755 ver);
1756 }
1757 } else if (key_info & WPA_KEY_INFO_SMK_MESSAGE) {
1758 /* PeerKey SMK Handshake */
1759 peerkey_rx_eapol_smk(sm, src_addr, key, extra_len, key_info,
1760 ver);
1761 } else {
1762 if (key_info & WPA_KEY_INFO_MIC) {
1763 /* 1/2 Group Key Handshake */
1764 wpa_supplicant_process_1_of_2(sm, src_addr, key,
1765 extra_len, ver);
1766 } else {
1767 wpa_printf(MSG_WARNING, "WPA: EAPOL-Key (Group) "
1768 "without Mic bit - dropped");
1769 }
1770 }
1771
1772 ret = 1;
1773
1774 out:
1775 os_free(tmp);
1776 return ret;
1777 }
1778
1779
1780 #ifdef CONFIG_CTRL_IFACE
1781 static int wpa_cipher_bits(int cipher)
1782 {
1783 switch (cipher) {
1784 case WPA_CIPHER_CCMP:
1785 return 128;
1786 case WPA_CIPHER_TKIP:
1787 return 256;
1788 case WPA_CIPHER_WEP104:
1789 return 104;
1790 case WPA_CIPHER_WEP40:
1791 return 40;
1792 default:
1793 return 0;
1794 }
1795 }
1796
1797
1798 static u32 wpa_key_mgmt_suite(struct wpa_sm *sm)
1799 {
1800 switch (sm->key_mgmt) {
1801 case WPA_KEY_MGMT_IEEE8021X:
1802 return (sm->proto == WPA_PROTO_RSN ?
1803 RSN_AUTH_KEY_MGMT_UNSPEC_802_1X :
1804 WPA_AUTH_KEY_MGMT_UNSPEC_802_1X);
1805 case WPA_KEY_MGMT_PSK:
1806 return (sm->proto == WPA_PROTO_RSN ?
1807 RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X :
1808 WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X);
1809 #ifdef CONFIG_IEEE80211R
1810 case WPA_KEY_MGMT_FT_IEEE8021X:
1811 return RSN_AUTH_KEY_MGMT_FT_802_1X;
1812 case WPA_KEY_MGMT_FT_PSK:
1813 return RSN_AUTH_KEY_MGMT_FT_PSK;
1814 #endif /* CONFIG_IEEE80211R */
1815 #ifdef CONFIG_IEEE80211W
1816 case WPA_KEY_MGMT_IEEE8021X_SHA256:
1817 return RSN_AUTH_KEY_MGMT_802_1X_SHA256;
1818 case WPA_KEY_MGMT_PSK_SHA256:
1819 return RSN_AUTH_KEY_MGMT_PSK_SHA256;
1820 #endif /* CONFIG_IEEE80211W */
1821 case WPA_KEY_MGMT_WPA_NONE:
1822 return WPA_AUTH_KEY_MGMT_NONE;
1823 default:
1824 return 0;
1825 }
1826 }
1827
1828
1829 static u32 wpa_cipher_suite(struct wpa_sm *sm, int cipher)
1830 {
1831 switch (cipher) {
1832 case WPA_CIPHER_CCMP:
1833 return (sm->proto == WPA_PROTO_RSN ?
1834 RSN_CIPHER_SUITE_CCMP : WPA_CIPHER_SUITE_CCMP);
1835 case WPA_CIPHER_TKIP:
1836 return (sm->proto == WPA_PROTO_RSN ?
1837 RSN_CIPHER_SUITE_TKIP : WPA_CIPHER_SUITE_TKIP);
1838 case WPA_CIPHER_WEP104:
1839 return (sm->proto == WPA_PROTO_RSN ?
1840 RSN_CIPHER_SUITE_WEP104 : WPA_CIPHER_SUITE_WEP104);
1841 case WPA_CIPHER_WEP40:
1842 return (sm->proto == WPA_PROTO_RSN ?
1843 RSN_CIPHER_SUITE_WEP40 : WPA_CIPHER_SUITE_WEP40);
1844 case WPA_CIPHER_NONE:
1845 return (sm->proto == WPA_PROTO_RSN ?
1846 RSN_CIPHER_SUITE_NONE : WPA_CIPHER_SUITE_NONE);
1847 default:
1848 return 0;
1849 }
1850 }
1851
1852
1853 #define RSN_SUITE "%02x-%02x-%02x-%d"
1854 #define RSN_SUITE_ARG(s) \
1855 ((s) >> 24) & 0xff, ((s) >> 16) & 0xff, ((s) >> 8) & 0xff, (s) & 0xff
1856
1857 /**
1858 * wpa_sm_get_mib - Dump text list of MIB entries
1859 * @sm: Pointer to WPA state machine data from wpa_sm_init()
1860 * @buf: Buffer for the list
1861 * @buflen: Length of the buffer
1862 * Returns: Number of bytes written to buffer
1863 *
1864 * This function is used fetch dot11 MIB variables.
1865 */
1866 int wpa_sm_get_mib(struct wpa_sm *sm, char *buf, size_t buflen)
1867 {
1868 char pmkid_txt[PMKID_LEN * 2 + 1];
1869 int rsna, ret;
1870 size_t len;
1871
1872 if (sm->cur_pmksa) {
1873 wpa_snprintf_hex(pmkid_txt, sizeof(pmkid_txt),
1874 sm->cur_pmksa->pmkid, PMKID_LEN);
1875 } else
1876 pmkid_txt[0] = '\0';
1877
1878 if ((wpa_key_mgmt_wpa_psk(sm->key_mgmt) ||
1879 wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt)) &&
1880 sm->proto == WPA_PROTO_RSN)
1881 rsna = 1;
1882 else
1883 rsna = 0;
1884
1885 ret = os_snprintf(buf, buflen,
1886 "dot11RSNAOptionImplemented=TRUE\n"
1887 "dot11RSNAPreauthenticationImplemented=TRUE\n"
1888 "dot11RSNAEnabled=%s\n"
1889 "dot11RSNAPreauthenticationEnabled=%s\n"
1890 "dot11RSNAConfigVersion=%d\n"
1891 "dot11RSNAConfigPairwiseKeysSupported=5\n"
1892 "dot11RSNAConfigGroupCipherSize=%d\n"
1893 "dot11RSNAConfigPMKLifetime=%d\n"
1894 "dot11RSNAConfigPMKReauthThreshold=%d\n"
1895 "dot11RSNAConfigNumberOfPTKSAReplayCounters=1\n"
1896 "dot11RSNAConfigSATimeout=%d\n",
1897 rsna ? "TRUE" : "FALSE",
1898 rsna ? "TRUE" : "FALSE",
1899 RSN_VERSION,
1900 wpa_cipher_bits(sm->group_cipher),
1901 sm->dot11RSNAConfigPMKLifetime,
1902 sm->dot11RSNAConfigPMKReauthThreshold,
1903 sm->dot11RSNAConfigSATimeout);
1904 if (ret < 0 || (size_t) ret >= buflen)
1905 return 0;
1906 len = ret;
1907
1908 ret = os_snprintf(
1909 buf + len, buflen - len,
1910 "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n"
1911 "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n"
1912 "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n"
1913 "dot11RSNAPMKIDUsed=%s\n"
1914 "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n"
1915 "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n"
1916 "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n"
1917 "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n"
1918 "dot11RSNA4WayHandshakeFailures=%u\n",
1919 RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)),
1920 RSN_SUITE_ARG(wpa_cipher_suite(sm, sm->pairwise_cipher)),
1921 RSN_SUITE_ARG(wpa_cipher_suite(sm, sm->group_cipher)),
1922 pmkid_txt,
1923 RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)),
1924 RSN_SUITE_ARG(wpa_cipher_suite(sm, sm->pairwise_cipher)),
1925 RSN_SUITE_ARG(wpa_cipher_suite(sm, sm->group_cipher)),
1926 sm->dot11RSNA4WayHandshakeFailures);
1927 if (ret >= 0 && (size_t) ret < buflen)
1928 len += ret;
1929
1930 return (int) len;
1931 }
1932 #endif /* CONFIG_CTRL_IFACE */
1933
1934
1935 static void wpa_sm_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry,
1936 void *ctx, int replace)
1937 {
1938 struct wpa_sm *sm = ctx;
1939
1940 if (sm->cur_pmksa == entry ||
1941 (sm->pmk_len == entry->pmk_len &&
1942 os_memcmp(sm->pmk, entry->pmk, sm->pmk_len) == 0)) {
1943 wpa_printf(MSG_DEBUG, "RSN: removed current PMKSA entry");
1944 sm->cur_pmksa = NULL;
1945
1946 if (replace) {
1947 /* A new entry is being added, so no need to
1948 * deauthenticate in this case. This happens when EAP
1949 * authentication is completed again (reauth or failed
1950 * PMKSA caching attempt). */
1951 return;
1952 }
1953
1954 os_memset(sm->pmk, 0, sizeof(sm->pmk));
1955 wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED);
1956 }
1957 }
1958
1959
1960 /**
1961 * wpa_sm_init - Initialize WPA state machine
1962 * @ctx: Context pointer for callbacks; this needs to be an allocated buffer
1963 * Returns: Pointer to the allocated WPA state machine data
1964 *
1965 * This function is used to allocate a new WPA state machine and the returned
1966 * value is passed to all WPA state machine calls.
1967 */
1968 struct wpa_sm * wpa_sm_init(struct wpa_sm_ctx *ctx)
1969 {
1970 struct wpa_sm *sm;
1971
1972 sm = os_zalloc(sizeof(*sm));
1973 if (sm == NULL)
1974 return NULL;
1975 dl_list_init(&sm->pmksa_candidates);
1976 sm->renew_snonce = 1;
1977 sm->ctx = ctx;
1978
1979 sm->dot11RSNAConfigPMKLifetime = 43200;
1980 sm->dot11RSNAConfigPMKReauthThreshold = 70;
1981 sm->dot11RSNAConfigSATimeout = 60;
1982
1983 sm->pmksa = pmksa_cache_init(wpa_sm_pmksa_free_cb, sm, sm);
1984 // Next line fixes compiler bug? Or is it a race?
1985 wpa_printf(MSG_DEBUG, "*** [wpa_sm_init] sm->pmksa=%p ***", sm->pmksa);
1986 if (sm->pmksa == NULL) {
1987 wpa_printf(MSG_ERROR, "RSN: PMKSA cache initialization "
1988 "failed");
1989 os_free(sm);
1990 return NULL;
1991 }
1992
1993 return sm;
1994 }
1995
1996
1997 /**
1998 * wpa_sm_deinit - Deinitialize WPA state machine
1999 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2000 */
2001 void wpa_sm_deinit(struct wpa_sm *sm)
2002 {
2003 if (sm == NULL)
2004 return;
2005 pmksa_cache_deinit(sm->pmksa);
2006 eloop_cancel_timeout(wpa_sm_start_preauth, sm, NULL);
2007 eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL);
2008 os_free(sm->assoc_wpa_ie);
2009 os_free(sm->ap_wpa_ie);
2010 os_free(sm->ap_rsn_ie);
2011 os_free(sm->ctx);
2012 peerkey_deinit(sm);
2013 #ifdef CONFIG_IEEE80211R
2014 os_free(sm->assoc_resp_ies);
2015 #endif /* CONFIG_IEEE80211R */
2016 os_free(sm);
2017 }
2018
2019
2020 /**
2021 * wpa_sm_notify_assoc - Notify WPA state machine about association
2022 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2023 * @bssid: The BSSID of the new association
2024 *
2025 * This function is called to let WPA state machine know that the connection
2026 * was established.
2027 */
2028 void wpa_sm_notify_assoc(struct wpa_sm *sm, const u8 *bssid)
2029 {
2030 int clear_ptk = 1;
2031
2032 if (sm == NULL)
2033 return;
2034
2035 wpa_printf(MSG_DEBUG, "WPA: Association event - clear replay counter");
2036 os_memcpy(sm->bssid, bssid, ETH_ALEN);
2037 os_memset(sm->rx_replay_counter, 0, WPA_REPLAY_COUNTER_LEN);
2038 sm->rx_replay_counter_set = 0;
2039 sm->renew_snonce = 1;
2040 if (os_memcmp(sm->preauth_bssid, bssid, ETH_ALEN) == 0)
2041 rsn_preauth_deinit(sm);
2042
2043 #ifdef CONFIG_IEEE80211R
2044 if (wpa_ft_is_completed(sm)) {
2045 /*
2046 * Clear portValid to kick EAPOL state machine to re-enter
2047 * AUTHENTICATED state to get the EAPOL port Authorized.
2048 */
2049 eapol_sm_notify_portValid(sm->eapol, FALSE);
2050 wpa_supplicant_key_neg_complete(sm, sm->bssid, 1);
2051
2052 /* Prepare for the next transition */
2053 wpa_ft_prepare_auth_request(sm, NULL);
2054
2055 clear_ptk = 0;
2056 }
2057 #endif /* CONFIG_IEEE80211R */
2058
2059 if (clear_ptk) {
2060 /*
2061 * IEEE 802.11, 8.4.10: Delete PTK SA on (re)association if
2062 * this is not part of a Fast BSS Transition.
2063 */
2064 wpa_printf(MSG_DEBUG, "WPA: Clear old PTK");
2065 sm->ptk_set = 0;
2066 sm->tptk_set = 0;
2067 }
2068 }
2069
2070
2071 /**
2072 * wpa_sm_notify_disassoc - Notify WPA state machine about disassociation
2073 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2074 *
2075 * This function is called to let WPA state machine know that the connection
2076 * was lost. This will abort any existing pre-authentication session.
2077 */
2078 void wpa_sm_notify_disassoc(struct wpa_sm *sm)
2079 {
2080 rsn_preauth_deinit(sm);
2081 if (wpa_sm_get_state(sm) == WPA_4WAY_HANDSHAKE)
2082 sm->dot11RSNA4WayHandshakeFailures++;
2083 }
2084
2085
2086 /**
2087 * wpa_sm_set_pmk - Set PMK
2088 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2089 * @pmk: The new PMK
2090 * @pmk_len: The length of the new PMK in bytes
2091 *
2092 * Configure the PMK for WPA state machine.
2093 */
2094 void wpa_sm_set_pmk(struct wpa_sm *sm, const u8 *pmk, size_t pmk_len)
2095 {
2096 if (sm == NULL)
2097 return;
2098
2099 sm->pmk_len = pmk_len;
2100 os_memcpy(sm->pmk, pmk, pmk_len);
2101
2102 #ifdef CONFIG_IEEE80211R
2103 /* Set XXKey to be PSK for FT key derivation */
2104 sm->xxkey_len = pmk_len;
2105 os_memcpy(sm->xxkey, pmk, pmk_len);
2106 #endif /* CONFIG_IEEE80211R */
2107 }
2108
2109
2110 /**
2111 * wpa_sm_set_pmk_from_pmksa - Set PMK based on the current PMKSA
2112 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2113 *
2114 * Take the PMK from the current PMKSA into use. If no PMKSA is active, the PMK
2115 * will be cleared.
2116 */
2117 void wpa_sm_set_pmk_from_pmksa(struct wpa_sm *sm)
2118 {
2119 if (sm == NULL)
2120 return;
2121
2122 if (sm->cur_pmksa) {
2123 sm->pmk_len = sm->cur_pmksa->pmk_len;
2124 os_memcpy(sm->pmk, sm->cur_pmksa->pmk, sm->pmk_len);
2125 } else {
2126 sm->pmk_len = PMK_LEN;
2127 os_memset(sm->pmk, 0, PMK_LEN);
2128 }
2129 }
2130
2131
2132 /**
2133 * wpa_sm_set_fast_reauth - Set fast reauthentication (EAP) enabled/disabled
2134 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2135 * @fast_reauth: Whether fast reauthentication (EAP) is allowed
2136 */
2137 void wpa_sm_set_fast_reauth(struct wpa_sm *sm, int fast_reauth)
2138 {
2139 if (sm)
2140 sm->fast_reauth = fast_reauth;
2141 }
2142
2143
2144 /**
2145 * wpa_sm_set_scard_ctx - Set context pointer for smartcard callbacks
2146 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2147 * @scard_ctx: Context pointer for smartcard related callback functions
2148 */
2149 void wpa_sm_set_scard_ctx(struct wpa_sm *sm, void *scard_ctx)
2150 {
2151 if (sm == NULL)
2152 return;
2153 sm->scard_ctx = scard_ctx;
2154 if (sm->preauth_eapol)
2155 eapol_sm_register_scard_ctx(sm->preauth_eapol, scard_ctx);
2156 }
2157
2158
2159 /**
2160 * wpa_sm_set_config - Notification of current configration change
2161 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2162 * @config: Pointer to current network configuration
2163 *
2164 * Notify WPA state machine that configuration has changed. config will be
2165 * stored as a backpointer to network configuration. This can be %NULL to clear
2166 * the stored pointed.
2167 */
2168 void wpa_sm_set_config(struct wpa_sm *sm, struct rsn_supp_config *config)
2169 {
2170 if (!sm)
2171 return;
2172
2173 if (config) {
2174 sm->network_ctx = config->network_ctx;
2175 sm->peerkey_enabled = config->peerkey_enabled;
2176 sm->allowed_pairwise_cipher = config->allowed_pairwise_cipher;
2177 sm->proactive_key_caching = config->proactive_key_caching;
2178 sm->eap_workaround = config->eap_workaround;
2179 sm->eap_conf_ctx = config->eap_conf_ctx;
2180 if (config->ssid) {
2181 os_memcpy(sm->ssid, config->ssid, config->ssid_len);
2182 sm->ssid_len = config->ssid_len;
2183 } else
2184 sm->ssid_len = 0;
2185 sm->wpa_ptk_rekey = config->wpa_ptk_rekey;
2186 } else {
2187 sm->network_ctx = NULL;
2188 sm->peerkey_enabled = 0;
2189 sm->allowed_pairwise_cipher = 0;
2190 sm->proactive_key_caching = 0;
2191 sm->eap_workaround = 0;
2192 sm->eap_conf_ctx = NULL;
2193 sm->ssid_len = 0;
2194 sm->wpa_ptk_rekey = 0;
2195 }
2196 if (config == NULL || config->network_ctx != sm->network_ctx)
2197 pmksa_cache_notify_reconfig(sm->pmksa);
2198 }
2199
2200
2201 /**
2202 * wpa_sm_set_own_addr - Set own MAC address
2203 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2204 * @addr: Own MAC address
2205 */
2206 void wpa_sm_set_own_addr(struct wpa_sm *sm, const u8 *addr)
2207 {
2208 if (sm)
2209 os_memcpy(sm->own_addr, addr, ETH_ALEN);
2210 }
2211
2212
2213 /**
2214 * wpa_sm_set_ifname - Set network interface name
2215 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2216 * @ifname: Interface name
2217 * @bridge_ifname: Optional bridge interface name (for pre-auth)
2218 */
2219 void wpa_sm_set_ifname(struct wpa_sm *sm, const char *ifname,
2220 const char *bridge_ifname)
2221 {
2222 if (sm) {
2223 sm->ifname = ifname;
2224 sm->bridge_ifname = bridge_ifname;
2225 }
2226 }
2227
2228
2229 /**
2230 * wpa_sm_set_eapol - Set EAPOL state machine pointer
2231 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2232 * @eapol: Pointer to EAPOL state machine allocated with eapol_sm_init()
2233 */
2234 void wpa_sm_set_eapol(struct wpa_sm *sm, struct eapol_sm *eapol)
2235 {
2236 if (sm)
2237 sm->eapol = eapol;
2238 }
2239
2240
2241 /**
2242 * wpa_sm_set_param - Set WPA state machine parameters
2243 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2244 * @param: Parameter field
2245 * @value: Parameter value
2246 * Returns: 0 on success, -1 on failure
2247 */
2248 int wpa_sm_set_param(struct wpa_sm *sm, enum wpa_sm_conf_params param,
2249 unsigned int value)
2250 {
2251 int ret = 0;
2252
2253 if (sm == NULL)
2254 return -1;
2255
2256 switch (param) {
2257 case RSNA_PMK_LIFETIME:
2258 if (value > 0)
2259 sm->dot11RSNAConfigPMKLifetime = value;
2260 else
2261 ret = -1;
2262 break;
2263 case RSNA_PMK_REAUTH_THRESHOLD:
2264 if (value > 0 && value <= 100)
2265 sm->dot11RSNAConfigPMKReauthThreshold = value;
2266 else
2267 ret = -1;
2268 break;
2269 case RSNA_SA_TIMEOUT:
2270 if (value > 0)
2271 sm->dot11RSNAConfigSATimeout = value;
2272 else
2273 ret = -1;
2274 break;
2275 case WPA_PARAM_PROTO:
2276 sm->proto = value;
2277 break;
2278 case WPA_PARAM_PAIRWISE:
2279 sm->pairwise_cipher = value;
2280 break;
2281 case WPA_PARAM_GROUP:
2282 sm->group_cipher = value;
2283 break;
2284 case WPA_PARAM_KEY_MGMT:
2285 sm->key_mgmt = value;
2286 break;
2287 #ifdef CONFIG_IEEE80211W
2288 case WPA_PARAM_MGMT_GROUP:
2289 sm->mgmt_group_cipher = value;
2290 break;
2291 #endif /* CONFIG_IEEE80211W */
2292 case WPA_PARAM_RSN_ENABLED:
2293 sm->rsn_enabled = value;
2294 break;
2295 case WPA_PARAM_MFP:
2296 sm->mfp = value;
2297 break;
2298 default:
2299 break;
2300 }
2301
2302 return ret;
2303 }
2304
2305
2306 /**
2307 * wpa_sm_get_param - Get WPA state machine parameters
2308 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2309 * @param: Parameter field
2310 * Returns: Parameter value
2311 */
2312 unsigned int wpa_sm_get_param(struct wpa_sm *sm, enum wpa_sm_conf_params param)
2313 {
2314 if (sm == NULL)
2315 return 0;
2316
2317 switch (param) {
2318 case RSNA_PMK_LIFETIME:
2319 return sm->dot11RSNAConfigPMKLifetime;
2320 case RSNA_PMK_REAUTH_THRESHOLD:
2321 return sm->dot11RSNAConfigPMKReauthThreshold;
2322 case RSNA_SA_TIMEOUT:
2323 return sm->dot11RSNAConfigSATimeout;
2324 case WPA_PARAM_PROTO:
2325 return sm->proto;
2326 case WPA_PARAM_PAIRWISE:
2327 return sm->pairwise_cipher;
2328 case WPA_PARAM_GROUP:
2329 return sm->group_cipher;
2330 case WPA_PARAM_KEY_MGMT:
2331 return sm->key_mgmt;
2332 #ifdef CONFIG_IEEE80211W
2333 case WPA_PARAM_MGMT_GROUP:
2334 return sm->mgmt_group_cipher;
2335 #endif /* CONFIG_IEEE80211W */
2336 case WPA_PARAM_RSN_ENABLED:
2337 return sm->rsn_enabled;
2338 default:
2339 return 0;
2340 }
2341 }
2342
2343
2344 /**
2345 * wpa_sm_get_status - Get WPA state machine
2346 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2347 * @buf: Buffer for status information
2348 * @buflen: Maximum buffer length
2349 * @verbose: Whether to include verbose status information
2350 * Returns: Number of bytes written to buf.
2351 *
2352 * Query WPA state machine for status information. This function fills in
2353 * a text area with current status information. If the buffer (buf) is not
2354 * large enough, status information will be truncated to fit the buffer.
2355 */
2356 int wpa_sm_get_status(struct wpa_sm *sm, char *buf, size_t buflen,
2357 int verbose)
2358 {
2359 char *pos = buf, *end = buf + buflen;
2360 int ret;
2361
2362 ret = os_snprintf(pos, end - pos,
2363 "pairwise_cipher=%s\n"
2364 "group_cipher=%s\n"
2365 "key_mgmt=%s\n",
2366 wpa_cipher_txt(sm->pairwise_cipher),
2367 wpa_cipher_txt(sm->group_cipher),
2368 wpa_key_mgmt_txt(sm->key_mgmt, sm->proto));
2369 if (ret < 0 || ret >= end - pos)
2370 return pos - buf;
2371 pos += ret;
2372 return pos - buf;
2373 }
2374
2375
2376 /**
2377 * wpa_sm_set_assoc_wpa_ie_default - Generate own WPA/RSN IE from configuration
2378 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2379 * @wpa_ie: Pointer to buffer for WPA/RSN IE
2380 * @wpa_ie_len: Pointer to the length of the wpa_ie buffer
2381 * Returns: 0 on success, -1 on failure
2382 */
2383 int wpa_sm_set_assoc_wpa_ie_default(struct wpa_sm *sm, u8 *wpa_ie,
2384 size_t *wpa_ie_len)
2385 {
2386 int res;
2387
2388 if (sm == NULL)
2389 return -1;
2390
2391 res = wpa_gen_wpa_ie(sm, wpa_ie, *wpa_ie_len);
2392 if (res < 0)
2393 return -1;
2394 *wpa_ie_len = res;
2395
2396 wpa_hexdump(MSG_DEBUG, "WPA: Set own WPA IE default",
2397 wpa_ie, *wpa_ie_len);
2398
2399 if (sm->assoc_wpa_ie == NULL) {
2400 /*
2401 * Make a copy of the WPA/RSN IE so that 4-Way Handshake gets
2402 * the correct version of the IE even if PMKSA caching is
2403 * aborted (which would remove PMKID from IE generation).
2404 */
2405 sm->assoc_wpa_ie = os_malloc(*wpa_ie_len);
2406 if (sm->assoc_wpa_ie == NULL)
2407 return -1;
2408
2409 os_memcpy(sm->assoc_wpa_ie, wpa_ie, *wpa_ie_len);
2410 sm->assoc_wpa_ie_len = *wpa_ie_len;
2411 }
2412
2413 return 0;
2414 }
2415
2416
2417 /**
2418 * wpa_sm_set_assoc_wpa_ie - Set own WPA/RSN IE from (Re)AssocReq
2419 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2420 * @ie: Pointer to IE data (starting from id)
2421 * @len: IE length
2422 * Returns: 0 on success, -1 on failure
2423 *
2424 * Inform WPA state machine about the WPA/RSN IE used in (Re)Association
2425 * Request frame. The IE will be used to override the default value generated
2426 * with wpa_sm_set_assoc_wpa_ie_default().
2427 */
2428 int wpa_sm_set_assoc_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len)
2429 {
2430 if (sm == NULL)
2431 return -1;
2432
2433 os_free(sm->assoc_wpa_ie);
2434 if (ie == NULL || len == 0) {
2435 wpa_printf(MSG_DEBUG, "WPA: clearing own WPA/RSN IE");
2436 sm->assoc_wpa_ie = NULL;
2437 sm->assoc_wpa_ie_len = 0;
2438 } else {
2439 wpa_hexdump(MSG_DEBUG, "WPA: set own WPA/RSN IE", ie, len);
2440 sm->assoc_wpa_ie = os_malloc(len);
2441 if (sm->assoc_wpa_ie == NULL)
2442 return -1;
2443
2444 os_memcpy(sm->assoc_wpa_ie, ie, len);
2445 sm->assoc_wpa_ie_len = len;
2446 }
2447
2448 return 0;
2449 }
2450
2451
2452 /**
2453 * wpa_sm_set_ap_wpa_ie - Set AP WPA IE from Beacon/ProbeResp
2454 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2455 * @ie: Pointer to IE data (starting from id)
2456 * @len: IE length
2457 * Returns: 0 on success, -1 on failure
2458 *
2459 * Inform WPA state machine about the WPA IE used in Beacon / Probe Response
2460 * frame.
2461 */
2462 int wpa_sm_set_ap_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len)
2463 {
2464 if (sm == NULL)
2465 return -1;
2466
2467 os_free(sm->ap_wpa_ie);
2468 if (ie == NULL || len == 0) {
2469 wpa_printf(MSG_DEBUG, "WPA: clearing AP WPA IE");
2470 sm->ap_wpa_ie = NULL;
2471 sm->ap_wpa_ie_len = 0;
2472 } else {
2473 wpa_hexdump(MSG_DEBUG, "WPA: set AP WPA IE", ie, len);
2474 sm->ap_wpa_ie = os_malloc(len);
2475 if (sm->ap_wpa_ie == NULL)
2476 return -1;
2477
2478 os_memcpy(sm->ap_wpa_ie, ie, len);
2479 sm->ap_wpa_ie_len = len;
2480 }
2481
2482 return 0;
2483 }
2484
2485
2486 /**
2487 * wpa_sm_set_ap_rsn_ie - Set AP RSN IE from Beacon/ProbeResp
2488 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2489 * @ie: Pointer to IE data (starting from id)
2490 * @len: IE length
2491 * Returns: 0 on success, -1 on failure
2492 *
2493 * Inform WPA state machine about the RSN IE used in Beacon / Probe Response
2494 * frame.
2495 */
2496 int wpa_sm_set_ap_rsn_ie(struct wpa_sm *sm, const u8 *ie, size_t len)
2497 {
2498 if (sm == NULL)
2499 return -1;
2500
2501 os_free(sm->ap_rsn_ie);
2502 if (ie == NULL || len == 0) {
2503 wpa_printf(MSG_DEBUG, "WPA: clearing AP RSN IE");
2504 sm->ap_rsn_ie = NULL;
2505 sm->ap_rsn_ie_len = 0;
2506 } else {
2507 wpa_hexdump(MSG_DEBUG, "WPA: set AP RSN IE", ie, len);
2508 sm->ap_rsn_ie = os_malloc(len);
2509 if (sm->ap_rsn_ie == NULL)
2510 return -1;
2511
2512 os_memcpy(sm->ap_rsn_ie, ie, len);
2513 sm->ap_rsn_ie_len = len;
2514 }
2515
2516 return 0;
2517 }
2518
2519
2520 /**
2521 * wpa_sm_parse_own_wpa_ie - Parse own WPA/RSN IE
2522 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2523 * @data: Pointer to data area for parsing results
2524 * Returns: 0 on success, -1 if IE is not known, or -2 on parsing failure
2525 *
2526 * Parse the contents of the own WPA or RSN IE from (Re)AssocReq and write the
2527 * parsed data into data.
2528 */
2529 int wpa_sm_parse_own_wpa_ie(struct wpa_sm *sm, struct wpa_ie_data *data)
2530 {
2531 if (sm == NULL || sm->assoc_wpa_ie == NULL) {
2532 wpa_printf(MSG_DEBUG, "WPA: No WPA/RSN IE available from "
2533 "association info");
2534 return -1;
2535 }
2536 if (wpa_parse_wpa_ie(sm->assoc_wpa_ie, sm->assoc_wpa_ie_len, data))
2537 return -2;
2538 return 0;
2539 }
2540
2541
2542 int wpa_sm_pmksa_cache_list(struct wpa_sm *sm, char *buf, size_t len)
2543 {
2544 #ifndef CONFIG_NO_WPA2
2545 return pmksa_cache_list(sm->pmksa, buf, len);
2546 #else /* CONFIG_NO_WPA2 */
2547 return -1;
2548 #endif /* CONFIG_NO_WPA2 */
2549 }
2550
2551
2552 void wpa_sm_drop_sa(struct wpa_sm *sm)
2553 {
2554 wpa_printf(MSG_DEBUG, "WPA: Clear old PMK and PTK");
2555 sm->ptk_set = 0;
2556 sm->tptk_set = 0;
2557 os_memset(sm->pmk, 0, sizeof(sm->pmk));
2558 os_memset(&sm->ptk, 0, sizeof(sm->ptk));
2559 os_memset(&sm->tptk, 0, sizeof(sm->tptk));
2560 }
2561
2562
2563 int wpa_sm_has_ptk(struct wpa_sm *sm)
2564 {
2565 if (sm == NULL)
2566 return 0;
2567 return sm->ptk_set;
2568 }
Mirror of AROS' svn.