Line data Source code
1 : /*
2 : * WPA Supplicant - Mesh RSN routines
3 : * Copyright (c) 2013-2014, cozybit, Inc. All rights reserved.
4 : *
5 : * This software may be distributed under the terms of the BSD license.
6 : * See README for more details.
7 : */
8 :
9 : #include "utils/includes.h"
10 :
11 : #include "utils/common.h"
12 : #include "utils/eloop.h"
13 : #include "crypto/sha256.h"
14 : #include "crypto/random.h"
15 : #include "crypto/aes.h"
16 : #include "crypto/aes_siv.h"
17 : #include "rsn_supp/wpa.h"
18 : #include "ap/hostapd.h"
19 : #include "ap/wpa_auth.h"
20 : #include "ap/sta_info.h"
21 : #include "ap/ieee802_11.h"
22 : #include "wpa_supplicant_i.h"
23 : #include "driver_i.h"
24 : #include "wpas_glue.h"
25 : #include "mesh_mpm.h"
26 : #include "mesh_rsn.h"
27 :
28 : #define MESH_AUTH_TIMEOUT 10
29 : #define MESH_AUTH_RETRY 3
30 : #define MESH_AUTH_BLOCK_DURATION 3600
31 :
32 12 : void mesh_auth_timer(void *eloop_ctx, void *user_data)
33 : {
34 12 : struct wpa_supplicant *wpa_s = eloop_ctx;
35 12 : struct sta_info *sta = user_data;
36 :
37 12 : if (sta->sae->state != SAE_ACCEPTED) {
38 84 : wpa_printf(MSG_DEBUG, "AUTH: Re-authenticate with " MACSTR
39 : " (attempt %d) ",
40 84 : MAC2STR(sta->addr), sta->sae_auth_retry);
41 72 : wpa_msg(wpa_s, MSG_INFO, MESH_SAE_AUTH_FAILURE "addr=" MACSTR,
42 72 : MAC2STR(sta->addr));
43 12 : if (sta->sae_auth_retry < MESH_AUTH_RETRY) {
44 10 : mesh_rsn_auth_sae_sta(wpa_s, sta);
45 : } else {
46 2 : if (sta->sae_auth_retry > MESH_AUTH_RETRY) {
47 0 : ap_free_sta(wpa_s->ifmsh->bss[0], sta);
48 12 : return;
49 : }
50 :
51 : /* block the STA if exceeded the number of attempts */
52 2 : wpa_mesh_set_plink_state(wpa_s, sta, PLINK_BLOCKED);
53 2 : sta->sae->state = SAE_NOTHING;
54 2 : if (wpa_s->mesh_auth_block_duration <
55 : MESH_AUTH_BLOCK_DURATION)
56 2 : wpa_s->mesh_auth_block_duration += 60;
57 2 : eloop_register_timeout(wpa_s->mesh_auth_block_duration,
58 : 0, mesh_auth_timer, wpa_s, sta);
59 14 : wpa_msg(wpa_s, MSG_INFO, MESH_SAE_AUTH_BLOCKED "addr="
60 : MACSTR " duration=%d",
61 12 : MAC2STR(sta->addr),
62 : wpa_s->mesh_auth_block_duration);
63 : }
64 12 : sta->sae_auth_retry++;
65 : }
66 : }
67 :
68 :
69 8 : static void auth_logger(void *ctx, const u8 *addr, logger_level level,
70 : const char *txt)
71 : {
72 8 : if (addr)
73 48 : wpa_printf(MSG_DEBUG, "AUTH: " MACSTR " - %s",
74 48 : MAC2STR(addr), txt);
75 : else
76 0 : wpa_printf(MSG_DEBUG, "AUTH: %s", txt);
77 8 : }
78 :
79 :
80 0 : static const u8 *auth_get_psk(void *ctx, const u8 *addr,
81 : const u8 *p2p_dev_addr, const u8 *prev_psk)
82 : {
83 0 : struct mesh_rsn *mesh_rsn = ctx;
84 0 : struct hostapd_data *hapd = mesh_rsn->wpa_s->ifmsh->bss[0];
85 0 : struct sta_info *sta = ap_get_sta(hapd, addr);
86 :
87 0 : wpa_printf(MSG_DEBUG, "AUTH: %s (addr=" MACSTR " prev_psk=%p)",
88 0 : __func__, MAC2STR(addr), prev_psk);
89 :
90 0 : if (sta && sta->auth_alg == WLAN_AUTH_SAE) {
91 0 : if (!sta->sae || prev_psk)
92 0 : return NULL;
93 0 : return sta->sae->pmk;
94 : }
95 :
96 0 : return NULL;
97 : }
98 :
99 :
100 8 : static int auth_set_key(void *ctx, int vlan_id, enum wpa_alg alg,
101 : const u8 *addr, int idx, u8 *key, size_t key_len)
102 : {
103 8 : struct mesh_rsn *mesh_rsn = ctx;
104 : u8 seq[6];
105 :
106 8 : os_memset(seq, 0, sizeof(seq));
107 :
108 8 : if (addr) {
109 48 : wpa_printf(MSG_DEBUG, "AUTH: %s(alg=%d addr=" MACSTR
110 : " key_idx=%d)",
111 48 : __func__, alg, MAC2STR(addr), idx);
112 : } else {
113 0 : wpa_printf(MSG_DEBUG, "AUTH: %s(alg=%d key_idx=%d)",
114 : __func__, alg, idx);
115 : }
116 8 : wpa_hexdump_key(MSG_DEBUG, "AUTH: set_key - key", key, key_len);
117 :
118 8 : return wpa_drv_set_key(mesh_rsn->wpa_s, alg, addr, idx,
119 : 1, seq, 6, key, key_len);
120 : }
121 :
122 :
123 8 : static int auth_start_ampe(void *ctx, const u8 *addr)
124 : {
125 8 : struct mesh_rsn *mesh_rsn = ctx;
126 : struct hostapd_data *hapd;
127 : struct sta_info *sta;
128 :
129 8 : if (mesh_rsn->wpa_s->current_ssid->mode != WPAS_MODE_MESH)
130 0 : return -1;
131 :
132 8 : hapd = mesh_rsn->wpa_s->ifmsh->bss[0];
133 8 : sta = ap_get_sta(hapd, addr);
134 8 : if (sta)
135 8 : eloop_cancel_timeout(mesh_auth_timer, mesh_rsn->wpa_s, sta);
136 :
137 8 : mesh_mpm_auth_peer(mesh_rsn->wpa_s, addr);
138 8 : return 0;
139 : }
140 :
141 :
142 13 : static int __mesh_rsn_auth_init(struct mesh_rsn *rsn, const u8 *addr)
143 : {
144 : struct wpa_auth_config conf;
145 : struct wpa_auth_callbacks cb;
146 13 : u8 seq[6] = {};
147 :
148 13 : wpa_printf(MSG_DEBUG, "AUTH: Initializing group state machine");
149 :
150 13 : os_memset(&conf, 0, sizeof(conf));
151 13 : conf.wpa = 2;
152 13 : conf.wpa_key_mgmt = WPA_KEY_MGMT_SAE;
153 13 : conf.wpa_pairwise = WPA_CIPHER_CCMP;
154 13 : conf.rsn_pairwise = WPA_CIPHER_CCMP;
155 13 : conf.wpa_group = WPA_CIPHER_CCMP;
156 13 : conf.eapol_version = 0;
157 13 : conf.wpa_group_rekey = -1;
158 :
159 13 : os_memset(&cb, 0, sizeof(cb));
160 13 : cb.ctx = rsn;
161 13 : cb.logger = auth_logger;
162 13 : cb.get_psk = auth_get_psk;
163 13 : cb.set_key = auth_set_key;
164 13 : cb.start_ampe = auth_start_ampe;
165 :
166 13 : rsn->auth = wpa_init(addr, &conf, &cb);
167 13 : if (rsn->auth == NULL) {
168 1 : wpa_printf(MSG_DEBUG, "AUTH: wpa_init() failed");
169 1 : return -1;
170 : }
171 :
172 : /* TODO: support rekeying */
173 12 : if (random_get_bytes(rsn->mgtk, 16) < 0) {
174 0 : wpa_deinit(rsn->auth);
175 0 : return -1;
176 : }
177 :
178 : /* group mgmt */
179 12 : wpa_drv_set_key(rsn->wpa_s, WPA_ALG_IGTK, NULL, 4, 1,
180 12 : seq, sizeof(seq), rsn->mgtk, sizeof(rsn->mgtk));
181 :
182 : /* group privacy / data frames */
183 12 : wpa_drv_set_key(rsn->wpa_s, WPA_ALG_CCMP, NULL, 1, 1,
184 12 : seq, sizeof(seq), rsn->mgtk, sizeof(rsn->mgtk));
185 :
186 12 : return 0;
187 : }
188 :
189 :
190 1 : static void mesh_rsn_deinit(struct mesh_rsn *rsn)
191 : {
192 1 : os_memset(rsn->mgtk, 0, sizeof(rsn->mgtk));
193 1 : if (rsn->auth)
194 0 : wpa_deinit(rsn->auth);
195 1 : }
196 :
197 :
198 13 : struct mesh_rsn *mesh_rsn_auth_init(struct wpa_supplicant *wpa_s,
199 : struct mesh_conf *conf)
200 : {
201 : struct mesh_rsn *mesh_rsn;
202 13 : struct hostapd_data *bss = wpa_s->ifmsh->bss[0];
203 : const u8 *ie;
204 : size_t ie_len;
205 :
206 13 : mesh_rsn = os_zalloc(sizeof(*mesh_rsn));
207 13 : if (mesh_rsn == NULL)
208 0 : return NULL;
209 13 : mesh_rsn->wpa_s = wpa_s;
210 :
211 13 : if (__mesh_rsn_auth_init(mesh_rsn, wpa_s->own_addr) < 0) {
212 1 : mesh_rsn_deinit(mesh_rsn);
213 1 : os_free(mesh_rsn);
214 1 : return NULL;
215 : }
216 :
217 12 : bss->wpa_auth = mesh_rsn->auth;
218 :
219 12 : ie = wpa_auth_get_wpa_ie(mesh_rsn->auth, &ie_len);
220 12 : conf->rsn_ie = (u8 *) ie;
221 12 : conf->rsn_ie_len = ie_len;
222 :
223 12 : wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
224 :
225 12 : return mesh_rsn;
226 : }
227 :
228 :
229 27 : static int index_within_array(const int *array, int idx)
230 : {
231 : int i;
232 :
233 27 : for (i = 0; i < idx; i++) {
234 0 : if (array[i] == -1)
235 0 : return 0;
236 : }
237 :
238 27 : return 1;
239 : }
240 :
241 :
242 27 : static int mesh_rsn_sae_group(struct wpa_supplicant *wpa_s,
243 : struct sae_data *sae)
244 : {
245 27 : int *groups = wpa_s->ifmsh->bss[0]->conf->sae_groups;
246 :
247 : /* Configuration may have changed, so validate current index */
248 27 : if (!index_within_array(groups, wpa_s->mesh_rsn->sae_group_index))
249 0 : return -1;
250 :
251 : for (;;) {
252 27 : int group = groups[wpa_s->mesh_rsn->sae_group_index];
253 :
254 27 : if (group <= 0)
255 0 : break;
256 27 : if (sae_set_group(sae, group) == 0) {
257 27 : wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected SAE group %d",
258 : sae->group);
259 27 : return 0;
260 : }
261 0 : wpa_s->mesh_rsn->sae_group_index++;
262 0 : }
263 :
264 0 : return -1;
265 : }
266 :
267 :
268 27 : static int mesh_rsn_build_sae_commit(struct wpa_supplicant *wpa_s,
269 : struct wpa_ssid *ssid,
270 : struct sta_info *sta)
271 : {
272 27 : if (ssid->passphrase == NULL) {
273 0 : wpa_msg(wpa_s, MSG_DEBUG, "SAE: No password available");
274 0 : return -1;
275 : }
276 :
277 27 : if (mesh_rsn_sae_group(wpa_s, sta->sae) < 0) {
278 0 : wpa_msg(wpa_s, MSG_DEBUG, "SAE: Failed to select group");
279 0 : return -1;
280 : }
281 :
282 81 : return sae_prepare_commit(wpa_s->own_addr, sta->addr,
283 27 : (u8 *) ssid->passphrase,
284 27 : os_strlen(ssid->passphrase), sta->sae);
285 : }
286 :
287 :
288 : /* initiate new SAE authentication with sta */
289 27 : int mesh_rsn_auth_sae_sta(struct wpa_supplicant *wpa_s,
290 : struct sta_info *sta)
291 : {
292 27 : struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
293 27 : struct wpa_ssid *ssid = wpa_s->current_ssid;
294 : unsigned int rnd;
295 : int ret;
296 :
297 27 : if (!ssid) {
298 0 : wpa_msg(wpa_s, MSG_DEBUG,
299 : "AUTH: No current_ssid known to initiate new SAE");
300 0 : return -1;
301 : }
302 :
303 27 : if (!sta->sae) {
304 17 : sta->sae = os_zalloc(sizeof(*sta->sae));
305 17 : if (sta->sae == NULL)
306 0 : return -1;
307 : }
308 :
309 27 : if (mesh_rsn_build_sae_commit(wpa_s, ssid, sta))
310 0 : return -1;
311 :
312 162 : wpa_msg(wpa_s, MSG_DEBUG,
313 : "AUTH: started authentication with SAE peer: " MACSTR,
314 162 : MAC2STR(sta->addr));
315 :
316 27 : wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
317 27 : ret = auth_sae_init_committed(hapd, sta);
318 27 : if (ret)
319 0 : return ret;
320 :
321 27 : eloop_cancel_timeout(mesh_auth_timer, wpa_s, sta);
322 27 : rnd = rand() % MESH_AUTH_TIMEOUT;
323 27 : eloop_register_timeout(MESH_AUTH_TIMEOUT + rnd, 0, mesh_auth_timer,
324 : wpa_s, sta);
325 27 : return 0;
326 : }
327 :
328 :
329 38 : void mesh_rsn_get_pmkid(struct mesh_rsn *rsn, struct sta_info *sta, u8 *pmkid)
330 : {
331 : /* don't expect wpa auth to cache the pmkid for now */
332 76 : rsn_pmkid(sta->sae->pmk, PMK_LEN, rsn->wpa_s->own_addr,
333 38 : sta->addr, pmkid,
334 : wpa_key_mgmt_sha256(wpa_auth_sta_key_mgmt(sta->wpa_sm)));
335 38 : }
336 :
337 :
338 : static void
339 8 : mesh_rsn_derive_aek(struct mesh_rsn *rsn, struct sta_info *sta)
340 : {
341 8 : u8 *myaddr = rsn->wpa_s->own_addr;
342 8 : u8 *peer = sta->addr;
343 8 : u8 *addr1 = peer, *addr2 = myaddr;
344 : u8 context[AES_BLOCK_SIZE];
345 :
346 : /* SAE */
347 8 : RSN_SELECTOR_PUT(context, wpa_cipher_to_suite(0, WPA_CIPHER_GCMP));
348 :
349 8 : if (os_memcmp(myaddr, peer, ETH_ALEN) < 0) {
350 4 : addr1 = myaddr;
351 4 : addr2 = peer;
352 : }
353 8 : os_memcpy(context + 4, addr1, ETH_ALEN);
354 8 : os_memcpy(context + 10, addr2, ETH_ALEN);
355 :
356 8 : sha256_prf(sta->sae->pmk, sizeof(sta->sae->pmk), "AEK Derivation",
357 8 : context, sizeof(context), sta->aek, sizeof(sta->aek));
358 8 : }
359 :
360 :
361 : /* derive mesh temporal key from pmk */
362 8 : int mesh_rsn_derive_mtk(struct wpa_supplicant *wpa_s, struct sta_info *sta)
363 : {
364 : u8 *ptr;
365 : u8 *min, *max;
366 : u16 min_lid, max_lid;
367 8 : size_t nonce_len = sizeof(sta->my_nonce);
368 8 : size_t lid_len = sizeof(sta->my_lid);
369 8 : u8 *myaddr = wpa_s->own_addr;
370 8 : u8 *peer = sta->addr;
371 : /* 2 nonces, 2 linkids, akm suite, 2 mac addrs */
372 : u8 context[64 + 4 + 4 + 12];
373 :
374 8 : ptr = context;
375 8 : if (os_memcmp(sta->my_nonce, sta->peer_nonce, nonce_len) < 0) {
376 4 : min = sta->my_nonce;
377 4 : max = sta->peer_nonce;
378 : } else {
379 4 : min = sta->peer_nonce;
380 4 : max = sta->my_nonce;
381 : }
382 8 : os_memcpy(ptr, min, nonce_len);
383 8 : os_memcpy(ptr + nonce_len, max, nonce_len);
384 8 : ptr += 2 * nonce_len;
385 :
386 8 : if (sta->my_lid < sta->peer_lid) {
387 4 : min_lid = host_to_le16(sta->my_lid);
388 4 : max_lid = host_to_le16(sta->peer_lid);
389 : } else {
390 4 : min_lid = host_to_le16(sta->peer_lid);
391 4 : max_lid = host_to_le16(sta->my_lid);
392 : }
393 8 : os_memcpy(ptr, &min_lid, lid_len);
394 8 : os_memcpy(ptr + lid_len, &max_lid, lid_len);
395 8 : ptr += 2 * lid_len;
396 :
397 : /* SAE */
398 8 : RSN_SELECTOR_PUT(ptr, wpa_cipher_to_suite(0, WPA_CIPHER_GCMP));
399 8 : ptr += 4;
400 :
401 8 : if (os_memcmp(myaddr, peer, ETH_ALEN) < 0) {
402 4 : min = myaddr;
403 4 : max = peer;
404 : } else {
405 4 : min = peer;
406 4 : max = myaddr;
407 : }
408 8 : os_memcpy(ptr, min, ETH_ALEN);
409 8 : os_memcpy(ptr + ETH_ALEN, max, ETH_ALEN);
410 :
411 8 : sha256_prf(sta->sae->pmk, sizeof(sta->sae->pmk),
412 : "Temporal Key Derivation", context, sizeof(context),
413 8 : sta->mtk, sizeof(sta->mtk));
414 8 : return 0;
415 : }
416 :
417 :
418 8 : void mesh_rsn_init_ampe_sta(struct wpa_supplicant *wpa_s, struct sta_info *sta)
419 : {
420 8 : if (random_get_bytes(sta->my_nonce, 32) < 0) {
421 0 : wpa_printf(MSG_INFO, "mesh: Failed to derive random nonce");
422 : /* TODO: How to handle this more cleanly? */
423 : }
424 8 : os_memset(sta->peer_nonce, 0, 32);
425 8 : mesh_rsn_derive_aek(wpa_s->mesh_rsn, sta);
426 8 : }
427 :
428 :
429 : /* insert AMPE and encrypted MIC at @ie.
430 : * @mesh_rsn: mesh RSN context
431 : * @sta: STA we're sending to
432 : * @cat: pointer to category code in frame header.
433 : * @buf: wpabuf to add encrypted AMPE and MIC to.
434 : * */
435 38 : int mesh_rsn_protect_frame(struct mesh_rsn *rsn, struct sta_info *sta,
436 : const u8 *cat, struct wpabuf *buf)
437 : {
438 : struct ieee80211_ampe_ie *ampe;
439 38 : u8 const *ie = wpabuf_head_u8(buf) + wpabuf_len(buf);
440 38 : u8 *ampe_ie = NULL, *mic_ie = NULL, *mic_payload;
441 38 : const u8 *aad[] = { rsn->wpa_s->own_addr, sta->addr, cat };
442 38 : const size_t aad_len[] = { ETH_ALEN, ETH_ALEN, ie - cat };
443 38 : int ret = 0;
444 :
445 38 : if (AES_BLOCK_SIZE + 2 + sizeof(*ampe) + 2 > wpabuf_tailroom(buf)) {
446 0 : wpa_printf(MSG_ERROR, "protect frame: buffer too small");
447 0 : return -EINVAL;
448 : }
449 :
450 38 : ampe_ie = os_zalloc(2 + sizeof(*ampe));
451 38 : if (!ampe_ie) {
452 0 : wpa_printf(MSG_ERROR, "protect frame: out of memory");
453 0 : return -ENOMEM;
454 : }
455 :
456 38 : mic_ie = os_zalloc(2 + AES_BLOCK_SIZE);
457 38 : if (!mic_ie) {
458 0 : wpa_printf(MSG_ERROR, "protect frame: out of memory");
459 0 : ret = -ENOMEM;
460 0 : goto free;
461 : }
462 :
463 : /* IE: AMPE */
464 38 : ampe_ie[0] = WLAN_EID_AMPE;
465 38 : ampe_ie[1] = sizeof(*ampe);
466 38 : ampe = (struct ieee80211_ampe_ie *) (ampe_ie + 2);
467 :
468 38 : RSN_SELECTOR_PUT(ampe->selected_pairwise_suite,
469 : wpa_cipher_to_suite(WPA_PROTO_RSN, WPA_CIPHER_CCMP));
470 38 : os_memcpy(ampe->local_nonce, sta->my_nonce, 32);
471 38 : os_memcpy(ampe->peer_nonce, sta->peer_nonce, 32);
472 : /* incomplete: see 13.5.4 */
473 : /* TODO: static mgtk for now since we don't support rekeying! */
474 38 : os_memcpy(ampe->mgtk, rsn->mgtk, 16);
475 : /* TODO: Populate Key RSC */
476 : /* expire in 13 decades or so */
477 38 : os_memset(ampe->key_expiration, 0xff, 4);
478 :
479 : /* IE: MIC */
480 38 : mic_ie[0] = WLAN_EID_MIC;
481 38 : mic_ie[1] = AES_BLOCK_SIZE;
482 38 : wpabuf_put_data(buf, mic_ie, 2);
483 : /* MIC field is output ciphertext */
484 :
485 : /* encrypt after MIC */
486 38 : mic_payload = (u8 *) wpabuf_put(buf, 2 + sizeof(*ampe) +
487 : AES_BLOCK_SIZE);
488 :
489 38 : if (aes_siv_encrypt(sta->aek, ampe_ie, 2 + sizeof(*ampe), 3,
490 : aad, aad_len, mic_payload)) {
491 0 : wpa_printf(MSG_ERROR, "protect frame: failed to encrypt");
492 0 : ret = -ENOMEM;
493 0 : goto free;
494 : }
495 :
496 : free:
497 38 : os_free(ampe_ie);
498 38 : os_free(mic_ie);
499 :
500 38 : return ret;
501 : }
502 :
503 :
504 20 : int mesh_rsn_process_ampe(struct wpa_supplicant *wpa_s, struct sta_info *sta,
505 : struct ieee802_11_elems *elems, const u8 *cat,
506 : const u8 *start, size_t elems_len)
507 : {
508 20 : int ret = 0;
509 : struct ieee80211_ampe_ie *ampe;
510 20 : u8 null_nonce[32] = {};
511 : u8 ampe_eid;
512 : u8 ampe_ie_len;
513 20 : u8 *ampe_buf, *crypt = NULL;
514 : size_t crypt_len;
515 20 : const u8 *aad[] = { sta->addr, wpa_s->own_addr, cat };
516 40 : const size_t aad_len[] = { ETH_ALEN, ETH_ALEN,
517 20 : (elems->mic - 2) - cat };
518 :
519 20 : if (!elems->mic || elems->mic_len < AES_BLOCK_SIZE) {
520 0 : wpa_msg(wpa_s, MSG_DEBUG, "Mesh RSN: missing mic ie");
521 0 : return -1;
522 : }
523 :
524 20 : ampe_buf = (u8 *) elems->mic + elems->mic_len;
525 20 : if ((int) elems_len < ampe_buf - start)
526 0 : return -1;
527 :
528 20 : crypt_len = elems_len - (elems->mic - start);
529 20 : if (crypt_len < 2) {
530 0 : wpa_msg(wpa_s, MSG_DEBUG, "Mesh RSN: missing ampe ie");
531 0 : return -1;
532 : }
533 :
534 : /* crypt is modified by siv_decrypt */
535 20 : crypt = os_zalloc(crypt_len);
536 20 : if (!crypt) {
537 0 : wpa_printf(MSG_ERROR, "Mesh RSN: out of memory");
538 0 : ret = -ENOMEM;
539 0 : goto free;
540 : }
541 :
542 20 : os_memcpy(crypt, elems->mic, crypt_len);
543 :
544 20 : if (aes_siv_decrypt(sta->aek, crypt, crypt_len, 3,
545 : aad, aad_len, ampe_buf)) {
546 0 : wpa_printf(MSG_ERROR, "Mesh RSN: frame verification failed!");
547 0 : ret = -1;
548 0 : goto free;
549 : }
550 :
551 20 : ampe_eid = *ampe_buf++;
552 20 : ampe_ie_len = *ampe_buf++;
553 :
554 20 : if (ampe_eid != WLAN_EID_AMPE ||
555 : ampe_ie_len < sizeof(struct ieee80211_ampe_ie)) {
556 0 : wpa_msg(wpa_s, MSG_DEBUG, "Mesh RSN: invalid ampe ie");
557 0 : ret = -1;
558 0 : goto free;
559 : }
560 :
561 20 : ampe = (struct ieee80211_ampe_ie *) ampe_buf;
562 32 : if (os_memcmp(ampe->peer_nonce, null_nonce, 32) != 0 &&
563 12 : os_memcmp(ampe->peer_nonce, sta->my_nonce, 32) != 0) {
564 0 : wpa_msg(wpa_s, MSG_DEBUG, "Mesh RSN: invalid peer nonce");
565 0 : ret = -1;
566 0 : goto free;
567 : }
568 20 : os_memcpy(sta->peer_nonce, ampe->local_nonce,
569 : sizeof(ampe->local_nonce));
570 20 : os_memcpy(sta->mgtk, ampe->mgtk, sizeof(ampe->mgtk));
571 :
572 : /* todo parse mgtk expiration */
573 : free:
574 20 : os_free(crypt);
575 20 : return ret;
576 : }
|
