Line data Source code
1 : /*
2 : * hostapd - IEEE 802.11r - Fast BSS Transition
3 : * Copyright (c) 2004-2015, Jouni Malinen <j@w1.fi>
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 "utils/list.h"
14 : #include "common/ieee802_11_defs.h"
15 : #include "common/ieee802_11_common.h"
16 : #include "crypto/aes_wrap.h"
17 : #include "crypto/random.h"
18 : #include "ap_config.h"
19 : #include "ieee802_11.h"
20 : #include "wmm.h"
21 : #include "wpa_auth.h"
22 : #include "wpa_auth_i.h"
23 :
24 :
25 : #ifdef CONFIG_IEEE80211R
26 :
27 : static int wpa_ft_send_rrb_auth_resp(struct wpa_state_machine *sm,
28 : const u8 *current_ap, const u8 *sta_addr,
29 : u16 status, const u8 *resp_ies,
30 : size_t resp_ies_len);
31 :
32 :
33 271 : static int wpa_ft_rrb_send(struct wpa_authenticator *wpa_auth, const u8 *dst,
34 : const u8 *data, size_t data_len)
35 : {
36 271 : if (wpa_auth->cb.send_ether == NULL)
37 0 : return -1;
38 271 : wpa_printf(MSG_DEBUG, "FT: RRB send to " MACSTR, MAC2STR(dst));
39 271 : return wpa_auth->cb.send_ether(wpa_auth->cb.ctx, dst, ETH_P_RRB,
40 : data, data_len);
41 : }
42 :
43 :
44 111 : static int wpa_ft_action_send(struct wpa_authenticator *wpa_auth,
45 : const u8 *dst, const u8 *data, size_t data_len)
46 : {
47 111 : if (wpa_auth->cb.send_ft_action == NULL)
48 0 : return -1;
49 111 : return wpa_auth->cb.send_ft_action(wpa_auth->cb.ctx, dst,
50 : data, data_len);
51 : }
52 :
53 :
54 : static struct wpa_state_machine *
55 113 : wpa_ft_add_sta(struct wpa_authenticator *wpa_auth, const u8 *sta_addr)
56 : {
57 113 : if (wpa_auth->cb.add_sta == NULL)
58 0 : return NULL;
59 113 : return wpa_auth->cb.add_sta(wpa_auth->cb.ctx, sta_addr);
60 : }
61 :
62 :
63 0 : static int wpa_ft_add_tspec(struct wpa_authenticator *wpa_auth,
64 : const u8 *sta_addr,
65 : u8 *tspec_ie, size_t tspec_ielen)
66 : {
67 0 : if (wpa_auth->cb.add_tspec == NULL) {
68 0 : wpa_printf(MSG_DEBUG, "FT: add_tspec is not initialized");
69 0 : return -1;
70 : }
71 0 : return wpa_auth->cb.add_tspec(wpa_auth->cb.ctx, sta_addr, tspec_ie,
72 : tspec_ielen);
73 : }
74 :
75 :
76 548 : int wpa_write_mdie(struct wpa_auth_config *conf, u8 *buf, size_t len)
77 : {
78 548 : u8 *pos = buf;
79 : u8 capab;
80 548 : if (len < 2 + sizeof(struct rsn_mdie))
81 0 : return -1;
82 :
83 548 : *pos++ = WLAN_EID_MOBILITY_DOMAIN;
84 548 : *pos++ = MOBILITY_DOMAIN_ID_LEN + 1;
85 548 : os_memcpy(pos, conf->mobility_domain, MOBILITY_DOMAIN_ID_LEN);
86 548 : pos += MOBILITY_DOMAIN_ID_LEN;
87 548 : capab = 0;
88 548 : if (conf->ft_over_ds)
89 548 : capab |= RSN_FT_CAPAB_FT_OVER_DS;
90 548 : *pos++ = capab;
91 :
92 548 : return pos - buf;
93 : }
94 :
95 :
96 540 : int wpa_write_ftie(struct wpa_auth_config *conf, const u8 *r0kh_id,
97 : size_t r0kh_id_len,
98 : const u8 *anonce, const u8 *snonce,
99 : u8 *buf, size_t len, const u8 *subelem,
100 : size_t subelem_len)
101 : {
102 540 : u8 *pos = buf, *ielen;
103 : struct rsn_ftie *hdr;
104 :
105 540 : if (len < 2 + sizeof(*hdr) + 2 + FT_R1KH_ID_LEN + 2 + r0kh_id_len +
106 : subelem_len)
107 0 : return -1;
108 :
109 540 : *pos++ = WLAN_EID_FAST_BSS_TRANSITION;
110 540 : ielen = pos++;
111 :
112 540 : hdr = (struct rsn_ftie *) pos;
113 540 : os_memset(hdr, 0, sizeof(*hdr));
114 540 : pos += sizeof(*hdr);
115 540 : WPA_PUT_LE16(hdr->mic_control, 0);
116 540 : if (anonce)
117 450 : os_memcpy(hdr->anonce, anonce, WPA_NONCE_LEN);
118 540 : if (snonce)
119 450 : os_memcpy(hdr->snonce, snonce, WPA_NONCE_LEN);
120 :
121 : /* Optional Parameters */
122 540 : *pos++ = FTIE_SUBELEM_R1KH_ID;
123 540 : *pos++ = FT_R1KH_ID_LEN;
124 540 : os_memcpy(pos, conf->r1_key_holder, FT_R1KH_ID_LEN);
125 540 : pos += FT_R1KH_ID_LEN;
126 :
127 540 : if (r0kh_id) {
128 540 : *pos++ = FTIE_SUBELEM_R0KH_ID;
129 540 : *pos++ = r0kh_id_len;
130 540 : os_memcpy(pos, r0kh_id, r0kh_id_len);
131 540 : pos += r0kh_id_len;
132 : }
133 :
134 540 : if (subelem) {
135 223 : os_memcpy(pos, subelem, subelem_len);
136 223 : pos += subelem_len;
137 : }
138 :
139 540 : *ielen = pos - buf - 2;
140 :
141 540 : return pos - buf;
142 : }
143 :
144 :
145 : struct wpa_ft_pmk_r0_sa {
146 : struct wpa_ft_pmk_r0_sa *next;
147 : u8 pmk_r0[PMK_LEN];
148 : u8 pmk_r0_name[WPA_PMK_NAME_LEN];
149 : u8 spa[ETH_ALEN];
150 : int pairwise; /* Pairwise cipher suite, WPA_CIPHER_* */
151 : /* TODO: expiration, identity, radius_class, EAP type, VLAN ID */
152 : int pmk_r1_pushed;
153 : };
154 :
155 : struct wpa_ft_pmk_r1_sa {
156 : struct wpa_ft_pmk_r1_sa *next;
157 : u8 pmk_r1[PMK_LEN];
158 : u8 pmk_r1_name[WPA_PMK_NAME_LEN];
159 : u8 spa[ETH_ALEN];
160 : int pairwise; /* Pairwise cipher suite, WPA_CIPHER_* */
161 : /* TODO: expiration, identity, radius_class, EAP type, VLAN ID */
162 : };
163 :
164 : struct wpa_ft_pmk_cache {
165 : struct wpa_ft_pmk_r0_sa *pmk_r0;
166 : struct wpa_ft_pmk_r1_sa *pmk_r1;
167 : };
168 :
169 1293 : struct wpa_ft_pmk_cache * wpa_ft_pmk_cache_init(void)
170 : {
171 : struct wpa_ft_pmk_cache *cache;
172 :
173 1293 : cache = os_zalloc(sizeof(*cache));
174 :
175 1293 : return cache;
176 : }
177 :
178 :
179 1293 : void wpa_ft_pmk_cache_deinit(struct wpa_ft_pmk_cache *cache)
180 : {
181 : struct wpa_ft_pmk_r0_sa *r0, *r0prev;
182 : struct wpa_ft_pmk_r1_sa *r1, *r1prev;
183 :
184 1293 : r0 = cache->pmk_r0;
185 2632 : while (r0) {
186 46 : r0prev = r0;
187 46 : r0 = r0->next;
188 46 : os_memset(r0prev->pmk_r0, 0, PMK_LEN);
189 46 : os_free(r0prev);
190 : }
191 :
192 1293 : r1 = cache->pmk_r1;
193 2657 : while (r1) {
194 71 : r1prev = r1;
195 71 : r1 = r1->next;
196 71 : os_memset(r1prev->pmk_r1, 0, PMK_LEN);
197 71 : os_free(r1prev);
198 : }
199 :
200 1293 : os_free(cache);
201 1293 : }
202 :
203 :
204 46 : static int wpa_ft_store_pmk_r0(struct wpa_authenticator *wpa_auth,
205 : const u8 *spa, const u8 *pmk_r0,
206 : const u8 *pmk_r0_name, int pairwise)
207 : {
208 46 : struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
209 : struct wpa_ft_pmk_r0_sa *r0;
210 :
211 : /* TODO: add expiration and limit on number of entries in cache */
212 :
213 46 : r0 = os_zalloc(sizeof(*r0));
214 46 : if (r0 == NULL)
215 0 : return -1;
216 :
217 46 : os_memcpy(r0->pmk_r0, pmk_r0, PMK_LEN);
218 46 : os_memcpy(r0->pmk_r0_name, pmk_r0_name, WPA_PMK_NAME_LEN);
219 46 : os_memcpy(r0->spa, spa, ETH_ALEN);
220 46 : r0->pairwise = pairwise;
221 :
222 46 : r0->next = cache->pmk_r0;
223 46 : cache->pmk_r0 = r0;
224 :
225 46 : return 0;
226 : }
227 :
228 :
229 6 : static int wpa_ft_fetch_pmk_r0(struct wpa_authenticator *wpa_auth,
230 : const u8 *spa, const u8 *pmk_r0_name,
231 : u8 *pmk_r0, int *pairwise)
232 : {
233 6 : struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
234 : struct wpa_ft_pmk_r0_sa *r0;
235 :
236 6 : r0 = cache->pmk_r0;
237 18 : while (r0) {
238 18 : if (os_memcmp(r0->spa, spa, ETH_ALEN) == 0 &&
239 9 : os_memcmp_const(r0->pmk_r0_name, pmk_r0_name,
240 : WPA_PMK_NAME_LEN) == 0) {
241 3 : os_memcpy(pmk_r0, r0->pmk_r0, PMK_LEN);
242 3 : if (pairwise)
243 3 : *pairwise = r0->pairwise;
244 3 : return 0;
245 : }
246 :
247 6 : r0 = r0->next;
248 : }
249 :
250 3 : return -1;
251 : }
252 :
253 :
254 71 : static int wpa_ft_store_pmk_r1(struct wpa_authenticator *wpa_auth,
255 : const u8 *spa, const u8 *pmk_r1,
256 : const u8 *pmk_r1_name, int pairwise)
257 : {
258 71 : struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
259 : struct wpa_ft_pmk_r1_sa *r1;
260 :
261 : /* TODO: add expiration and limit on number of entries in cache */
262 :
263 71 : r1 = os_zalloc(sizeof(*r1));
264 71 : if (r1 == NULL)
265 0 : return -1;
266 :
267 71 : os_memcpy(r1->pmk_r1, pmk_r1, PMK_LEN);
268 71 : os_memcpy(r1->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN);
269 71 : os_memcpy(r1->spa, spa, ETH_ALEN);
270 71 : r1->pairwise = pairwise;
271 :
272 71 : r1->next = cache->pmk_r1;
273 71 : cache->pmk_r1 = r1;
274 :
275 71 : return 0;
276 : }
277 :
278 :
279 238 : static int wpa_ft_fetch_pmk_r1(struct wpa_authenticator *wpa_auth,
280 : const u8 *spa, const u8 *pmk_r1_name,
281 : u8 *pmk_r1, int *pairwise)
282 : {
283 238 : struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
284 : struct wpa_ft_pmk_r1_sa *r1;
285 :
286 238 : r1 = cache->pmk_r1;
287 482 : while (r1) {
288 466 : if (os_memcmp(r1->spa, spa, ETH_ALEN) == 0 &&
289 233 : os_memcmp_const(r1->pmk_r1_name, pmk_r1_name,
290 : WPA_PMK_NAME_LEN) == 0) {
291 227 : os_memcpy(pmk_r1, r1->pmk_r1, PMK_LEN);
292 227 : if (pairwise)
293 227 : *pairwise = r1->pairwise;
294 227 : return 0;
295 : }
296 :
297 6 : r1 = r1->next;
298 : }
299 :
300 11 : return -1;
301 : }
302 :
303 :
304 11 : static int wpa_ft_pull_pmk_r1(struct wpa_state_machine *sm,
305 : const u8 *ies, size_t ies_len,
306 : const u8 *pmk_r0_name)
307 : {
308 : struct ft_remote_r0kh *r0kh;
309 : struct ft_r0kh_r1kh_pull_frame frame, f;
310 :
311 11 : r0kh = sm->wpa_auth->conf.r0kh_list;
312 34 : while (r0kh) {
313 44 : if (r0kh->id_len == sm->r0kh_id_len &&
314 22 : os_memcmp_const(r0kh->id, sm->r0kh_id, sm->r0kh_id_len) ==
315 : 0)
316 10 : break;
317 12 : r0kh = r0kh->next;
318 : }
319 11 : if (r0kh == NULL) {
320 2 : wpa_hexdump(MSG_DEBUG, "FT: Did not find R0KH-ID",
321 1 : sm->r0kh_id, sm->r0kh_id_len);
322 1 : return -1;
323 : }
324 :
325 60 : wpa_printf(MSG_DEBUG, "FT: Send PMK-R1 pull request to remote R0KH "
326 60 : "address " MACSTR, MAC2STR(r0kh->addr));
327 :
328 10 : os_memset(&frame, 0, sizeof(frame));
329 10 : frame.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
330 10 : frame.packet_type = FT_PACKET_R0KH_R1KH_PULL;
331 10 : frame.data_length = host_to_le16(FT_R0KH_R1KH_PULL_DATA_LEN);
332 10 : os_memcpy(frame.ap_address, sm->wpa_auth->addr, ETH_ALEN);
333 :
334 : /* aes_wrap() does not support inplace encryption, so use a temporary
335 : * buffer for the data. */
336 10 : if (random_get_bytes(f.nonce, FT_R0KH_R1KH_PULL_NONCE_LEN)) {
337 0 : wpa_printf(MSG_DEBUG, "FT: Failed to get random data for "
338 : "nonce");
339 0 : return -1;
340 : }
341 10 : os_memcpy(sm->ft_pending_pull_nonce, f.nonce,
342 : FT_R0KH_R1KH_PULL_NONCE_LEN);
343 10 : os_memcpy(f.pmk_r0_name, pmk_r0_name, WPA_PMK_NAME_LEN);
344 10 : os_memcpy(f.r1kh_id, sm->wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN);
345 10 : os_memcpy(f.s1kh_id, sm->addr, ETH_ALEN);
346 10 : os_memset(f.pad, 0, sizeof(f.pad));
347 :
348 10 : if (aes_wrap(r0kh->key, sizeof(r0kh->key),
349 : (FT_R0KH_R1KH_PULL_DATA_LEN + 7) / 8,
350 : f.nonce, frame.nonce) < 0)
351 0 : return -1;
352 :
353 10 : wpabuf_free(sm->ft_pending_req_ies);
354 10 : sm->ft_pending_req_ies = wpabuf_alloc_copy(ies, ies_len);
355 10 : if (sm->ft_pending_req_ies == NULL)
356 0 : return -1;
357 :
358 10 : wpa_ft_rrb_send(sm->wpa_auth, r0kh->addr, (u8 *) &frame, sizeof(frame));
359 :
360 10 : return 0;
361 : }
362 :
363 :
364 46 : int wpa_auth_derive_ptk_ft(struct wpa_state_machine *sm, const u8 *pmk,
365 : struct wpa_ptk *ptk)
366 : {
367 : u8 pmk_r0[PMK_LEN], pmk_r0_name[WPA_PMK_NAME_LEN];
368 : u8 pmk_r1[PMK_LEN];
369 : u8 ptk_name[WPA_PMK_NAME_LEN];
370 46 : const u8 *mdid = sm->wpa_auth->conf.mobility_domain;
371 46 : const u8 *r0kh = sm->wpa_auth->conf.r0_key_holder;
372 46 : size_t r0kh_len = sm->wpa_auth->conf.r0_key_holder_len;
373 46 : const u8 *r1kh = sm->wpa_auth->conf.r1_key_holder;
374 46 : const u8 *ssid = sm->wpa_auth->conf.ssid;
375 46 : size_t ssid_len = sm->wpa_auth->conf.ssid_len;
376 :
377 46 : if (sm->xxkey_len == 0) {
378 0 : wpa_printf(MSG_DEBUG, "FT: XXKey not available for key "
379 : "derivation");
380 0 : return -1;
381 : }
382 :
383 46 : wpa_derive_pmk_r0(sm->xxkey, sm->xxkey_len, ssid, ssid_len, mdid,
384 46 : r0kh, r0kh_len, sm->addr, pmk_r0, pmk_r0_name);
385 46 : wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R0", pmk_r0, PMK_LEN);
386 46 : wpa_hexdump(MSG_DEBUG, "FT: PMKR0Name", pmk_r0_name, WPA_PMK_NAME_LEN);
387 46 : wpa_ft_store_pmk_r0(sm->wpa_auth, sm->addr, pmk_r0, pmk_r0_name,
388 : sm->pairwise);
389 :
390 46 : wpa_derive_pmk_r1(pmk_r0, pmk_r0_name, r1kh, sm->addr,
391 46 : pmk_r1, sm->pmk_r1_name);
392 46 : wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", pmk_r1, PMK_LEN);
393 46 : wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", sm->pmk_r1_name,
394 : WPA_PMK_NAME_LEN);
395 46 : wpa_ft_store_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1, sm->pmk_r1_name,
396 : sm->pairwise);
397 :
398 92 : return wpa_pmk_r1_to_ptk(pmk_r1, sm->SNonce, sm->ANonce, sm->addr,
399 46 : sm->wpa_auth->addr, sm->pmk_r1_name,
400 : ptk, ptk_name, sm->wpa_key_mgmt, sm->pairwise);
401 : }
402 :
403 :
404 227 : static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
405 : const u8 *addr, int idx, u8 *seq)
406 : {
407 227 : if (wpa_auth->cb.get_seqnum == NULL)
408 0 : return -1;
409 227 : return wpa_auth->cb.get_seqnum(wpa_auth->cb.ctx, addr, idx, seq);
410 : }
411 :
412 :
413 223 : static u8 * wpa_ft_gtk_subelem(struct wpa_state_machine *sm, size_t *len)
414 : {
415 : u8 *subelem;
416 223 : struct wpa_group *gsm = sm->group;
417 : size_t subelem_len, pad_len;
418 : const u8 *key;
419 : size_t key_len;
420 : u8 keybuf[32];
421 :
422 223 : key_len = gsm->GTK_len;
423 223 : if (key_len > sizeof(keybuf))
424 0 : return NULL;
425 :
426 : /*
427 : * Pad key for AES Key Wrap if it is not multiple of 8 bytes or is less
428 : * than 16 bytes.
429 : */
430 223 : pad_len = key_len % 8;
431 223 : if (pad_len)
432 0 : pad_len = 8 - pad_len;
433 223 : if (key_len + pad_len < 16)
434 0 : pad_len += 8;
435 223 : if (pad_len && key_len < sizeof(keybuf)) {
436 0 : os_memcpy(keybuf, gsm->GTK[gsm->GN - 1], key_len);
437 0 : os_memset(keybuf + key_len, 0, pad_len);
438 0 : keybuf[key_len] = 0xdd;
439 0 : key_len += pad_len;
440 0 : key = keybuf;
441 : } else
442 223 : key = gsm->GTK[gsm->GN - 1];
443 :
444 : /*
445 : * Sub-elem ID[1] | Length[1] | Key Info[2] | Key Length[1] | RSC[8] |
446 : * Key[5..32].
447 : */
448 223 : subelem_len = 13 + key_len + 8;
449 223 : subelem = os_zalloc(subelem_len);
450 223 : if (subelem == NULL)
451 0 : return NULL;
452 :
453 223 : subelem[0] = FTIE_SUBELEM_GTK;
454 223 : subelem[1] = 11 + key_len + 8;
455 : /* Key ID in B0-B1 of Key Info */
456 223 : WPA_PUT_LE16(&subelem[2], gsm->GN & 0x03);
457 223 : subelem[4] = gsm->GTK_len;
458 223 : wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, subelem + 5);
459 223 : if (aes_wrap(sm->PTK.kek, sm->PTK.kek_len, key_len / 8, key,
460 : subelem + 13)) {
461 0 : os_free(subelem);
462 0 : return NULL;
463 : }
464 :
465 223 : *len = subelem_len;
466 223 : return subelem;
467 : }
468 :
469 :
470 : #ifdef CONFIG_IEEE80211W
471 4 : static u8 * wpa_ft_igtk_subelem(struct wpa_state_machine *sm, size_t *len)
472 : {
473 : u8 *subelem, *pos;
474 4 : struct wpa_group *gsm = sm->group;
475 : size_t subelem_len;
476 :
477 : /* Sub-elem ID[1] | Length[1] | KeyID[2] | IPN[6] | Key Length[1] |
478 : * Key[16+8] */
479 4 : subelem_len = 1 + 1 + 2 + 6 + 1 + WPA_IGTK_LEN + 8;
480 4 : subelem = os_zalloc(subelem_len);
481 4 : if (subelem == NULL)
482 0 : return NULL;
483 :
484 4 : pos = subelem;
485 4 : *pos++ = FTIE_SUBELEM_IGTK;
486 4 : *pos++ = subelem_len - 2;
487 4 : WPA_PUT_LE16(pos, gsm->GN_igtk);
488 4 : pos += 2;
489 4 : wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos);
490 4 : pos += 6;
491 4 : *pos++ = WPA_IGTK_LEN;
492 4 : if (aes_wrap(sm->PTK.kek, sm->PTK.kek_len, WPA_IGTK_LEN / 8,
493 4 : gsm->IGTK[gsm->GN_igtk - 4], pos)) {
494 0 : os_free(subelem);
495 0 : return NULL;
496 : }
497 :
498 4 : *len = subelem_len;
499 4 : return subelem;
500 : }
501 : #endif /* CONFIG_IEEE80211W */
502 :
503 :
504 0 : static u8 * wpa_ft_process_rdie(struct wpa_state_machine *sm,
505 : u8 *pos, u8 *end, u8 id, u8 descr_count,
506 : const u8 *ies, size_t ies_len)
507 : {
508 : struct ieee802_11_elems parse;
509 : struct rsn_rdie *rdie;
510 :
511 0 : wpa_printf(MSG_DEBUG, "FT: Resource Request: id=%d descr_count=%d",
512 : id, descr_count);
513 0 : wpa_hexdump(MSG_MSGDUMP, "FT: Resource descriptor IE(s)",
514 : ies, ies_len);
515 :
516 0 : if (end - pos < (int) sizeof(*rdie)) {
517 0 : wpa_printf(MSG_ERROR, "FT: Not enough room for response RDIE");
518 0 : return pos;
519 : }
520 :
521 0 : *pos++ = WLAN_EID_RIC_DATA;
522 0 : *pos++ = sizeof(*rdie);
523 0 : rdie = (struct rsn_rdie *) pos;
524 0 : rdie->id = id;
525 0 : rdie->descr_count = 0;
526 0 : rdie->status_code = host_to_le16(WLAN_STATUS_SUCCESS);
527 0 : pos += sizeof(*rdie);
528 :
529 0 : if (ieee802_11_parse_elems((u8 *) ies, ies_len, &parse, 1) ==
530 : ParseFailed) {
531 0 : wpa_printf(MSG_DEBUG, "FT: Failed to parse request IEs");
532 0 : rdie->status_code =
533 : host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
534 0 : return pos;
535 : }
536 :
537 0 : if (parse.wmm_tspec) {
538 : struct wmm_tspec_element *tspec;
539 :
540 0 : if (parse.wmm_tspec_len + 2 < (int) sizeof(*tspec)) {
541 0 : wpa_printf(MSG_DEBUG, "FT: Too short WMM TSPEC IE "
542 0 : "(%d)", (int) parse.wmm_tspec_len);
543 0 : rdie->status_code =
544 : host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
545 0 : return pos;
546 : }
547 0 : if (end - pos < (int) sizeof(*tspec)) {
548 0 : wpa_printf(MSG_ERROR, "FT: Not enough room for "
549 : "response TSPEC");
550 0 : rdie->status_code =
551 : host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
552 0 : return pos;
553 : }
554 0 : tspec = (struct wmm_tspec_element *) pos;
555 0 : os_memcpy(tspec, parse.wmm_tspec - 2, sizeof(*tspec));
556 : }
557 :
558 : #ifdef NEED_AP_MLME
559 0 : if (parse.wmm_tspec && sm->wpa_auth->conf.ap_mlme) {
560 : int res;
561 :
562 0 : res = wmm_process_tspec((struct wmm_tspec_element *) pos);
563 0 : wpa_printf(MSG_DEBUG, "FT: ADDTS processing result: %d", res);
564 0 : if (res == WMM_ADDTS_STATUS_INVALID_PARAMETERS)
565 0 : rdie->status_code =
566 : host_to_le16(WLAN_STATUS_INVALID_PARAMETERS);
567 0 : else if (res == WMM_ADDTS_STATUS_REFUSED)
568 0 : rdie->status_code =
569 : host_to_le16(WLAN_STATUS_REQUEST_DECLINED);
570 : else {
571 : /* TSPEC accepted; include updated TSPEC in response */
572 0 : rdie->descr_count = 1;
573 0 : pos += sizeof(struct wmm_tspec_element);
574 : }
575 0 : return pos;
576 : }
577 : #endif /* NEED_AP_MLME */
578 :
579 0 : if (parse.wmm_tspec && !sm->wpa_auth->conf.ap_mlme) {
580 : int res;
581 :
582 0 : res = wpa_ft_add_tspec(sm->wpa_auth, sm->addr, pos,
583 : sizeof(struct wmm_tspec_element));
584 0 : if (res >= 0) {
585 0 : if (res)
586 0 : rdie->status_code = host_to_le16(res);
587 : else {
588 : /* TSPEC accepted; include updated TSPEC in
589 : * response */
590 0 : rdie->descr_count = 1;
591 0 : pos += sizeof(struct wmm_tspec_element);
592 : }
593 0 : return pos;
594 : }
595 : }
596 :
597 0 : wpa_printf(MSG_DEBUG, "FT: No supported resource requested");
598 0 : rdie->status_code = host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
599 0 : return pos;
600 : }
601 :
602 :
603 0 : static u8 * wpa_ft_process_ric(struct wpa_state_machine *sm, u8 *pos, u8 *end,
604 : const u8 *ric, size_t ric_len)
605 : {
606 : const u8 *rpos, *start;
607 : const struct rsn_rdie *rdie;
608 :
609 0 : wpa_hexdump(MSG_MSGDUMP, "FT: RIC Request", ric, ric_len);
610 :
611 0 : rpos = ric;
612 0 : while (rpos + sizeof(*rdie) < ric + ric_len) {
613 0 : if (rpos[0] != WLAN_EID_RIC_DATA || rpos[1] < sizeof(*rdie) ||
614 0 : rpos + 2 + rpos[1] > ric + ric_len)
615 : break;
616 0 : rdie = (const struct rsn_rdie *) (rpos + 2);
617 0 : rpos += 2 + rpos[1];
618 0 : start = rpos;
619 :
620 0 : while (rpos + 2 <= ric + ric_len &&
621 0 : rpos + 2 + rpos[1] <= ric + ric_len) {
622 0 : if (rpos[0] == WLAN_EID_RIC_DATA)
623 0 : break;
624 0 : rpos += 2 + rpos[1];
625 : }
626 0 : pos = wpa_ft_process_rdie(sm, pos, end, rdie->id,
627 0 : rdie->descr_count,
628 0 : start, rpos - start);
629 : }
630 :
631 0 : return pos;
632 : }
633 :
634 :
635 3306 : u8 * wpa_sm_write_assoc_resp_ies(struct wpa_state_machine *sm, u8 *pos,
636 : size_t max_len, int auth_alg,
637 : const u8 *req_ies, size_t req_ies_len)
638 : {
639 3306 : u8 *end, *mdie, *ftie, *rsnie = NULL, *r0kh_id, *subelem = NULL;
640 3306 : size_t mdie_len, ftie_len, rsnie_len = 0, r0kh_id_len, subelem_len = 0;
641 : int res;
642 : struct wpa_auth_config *conf;
643 : struct rsn_ftie *_ftie;
644 : struct wpa_ft_ies parse;
645 : u8 *ric_start;
646 : u8 *anonce, *snonce;
647 :
648 3306 : if (sm == NULL)
649 1106 : return pos;
650 :
651 2200 : conf = &sm->wpa_auth->conf;
652 :
653 2200 : if (!wpa_key_mgmt_ft(sm->wpa_key_mgmt))
654 1931 : return pos;
655 :
656 269 : end = pos + max_len;
657 :
658 269 : if (auth_alg == WLAN_AUTH_FT) {
659 : /*
660 : * RSN (only present if this is a Reassociation Response and
661 : * part of a fast BSS transition)
662 : */
663 223 : res = wpa_write_rsn_ie(conf, pos, end - pos, sm->pmk_r1_name);
664 223 : if (res < 0)
665 0 : return pos;
666 223 : rsnie = pos;
667 223 : rsnie_len = res;
668 223 : pos += res;
669 : }
670 :
671 : /* Mobility Domain Information */
672 269 : res = wpa_write_mdie(conf, pos, end - pos);
673 269 : if (res < 0)
674 0 : return pos;
675 269 : mdie = pos;
676 269 : mdie_len = res;
677 269 : pos += res;
678 :
679 : /* Fast BSS Transition Information */
680 269 : if (auth_alg == WLAN_AUTH_FT) {
681 223 : subelem = wpa_ft_gtk_subelem(sm, &subelem_len);
682 223 : r0kh_id = sm->r0kh_id;
683 223 : r0kh_id_len = sm->r0kh_id_len;
684 223 : anonce = sm->ANonce;
685 223 : snonce = sm->SNonce;
686 : #ifdef CONFIG_IEEE80211W
687 223 : if (sm->mgmt_frame_prot) {
688 : u8 *igtk;
689 : size_t igtk_len;
690 : u8 *nbuf;
691 4 : igtk = wpa_ft_igtk_subelem(sm, &igtk_len);
692 4 : if (igtk == NULL) {
693 0 : os_free(subelem);
694 0 : return pos;
695 : }
696 4 : nbuf = os_realloc(subelem, subelem_len + igtk_len);
697 4 : if (nbuf == NULL) {
698 0 : os_free(subelem);
699 0 : os_free(igtk);
700 0 : return pos;
701 : }
702 4 : subelem = nbuf;
703 4 : os_memcpy(subelem + subelem_len, igtk, igtk_len);
704 4 : subelem_len += igtk_len;
705 4 : os_free(igtk);
706 : }
707 : #endif /* CONFIG_IEEE80211W */
708 : } else {
709 46 : r0kh_id = conf->r0_key_holder;
710 46 : r0kh_id_len = conf->r0_key_holder_len;
711 46 : anonce = NULL;
712 46 : snonce = NULL;
713 : }
714 538 : res = wpa_write_ftie(conf, r0kh_id, r0kh_id_len, anonce, snonce, pos,
715 269 : end - pos, subelem, subelem_len);
716 269 : os_free(subelem);
717 269 : if (res < 0)
718 0 : return pos;
719 269 : ftie = pos;
720 269 : ftie_len = res;
721 269 : pos += res;
722 :
723 269 : os_free(sm->assoc_resp_ftie);
724 269 : sm->assoc_resp_ftie = os_malloc(ftie_len);
725 269 : if (sm->assoc_resp_ftie)
726 269 : os_memcpy(sm->assoc_resp_ftie, ftie, ftie_len);
727 :
728 269 : _ftie = (struct rsn_ftie *) (ftie + 2);
729 269 : if (auth_alg == WLAN_AUTH_FT)
730 223 : _ftie->mic_control[1] = 3; /* Information element count */
731 :
732 269 : ric_start = pos;
733 269 : if (wpa_ft_parse_ies(req_ies, req_ies_len, &parse) == 0 && parse.ric) {
734 0 : pos = wpa_ft_process_ric(sm, pos, end, parse.ric,
735 : parse.ric_len);
736 0 : if (auth_alg == WLAN_AUTH_FT)
737 0 : _ftie->mic_control[1] +=
738 0 : ieee802_11_ie_count(ric_start,
739 0 : pos - ric_start);
740 : }
741 269 : if (ric_start == pos)
742 269 : ric_start = NULL;
743 :
744 492 : if (auth_alg == WLAN_AUTH_FT &&
745 446 : wpa_ft_mic(sm->PTK.kck, sm->PTK.kck_len, sm->addr,
746 223 : sm->wpa_auth->addr, 6,
747 : mdie, mdie_len, ftie, ftie_len,
748 : rsnie, rsnie_len,
749 0 : ric_start, ric_start ? pos - ric_start : 0,
750 223 : _ftie->mic) < 0)
751 0 : wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC");
752 :
753 269 : return pos;
754 : }
755 :
756 :
757 450 : static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
758 : int vlan_id,
759 : enum wpa_alg alg, const u8 *addr, int idx,
760 : u8 *key, size_t key_len)
761 : {
762 450 : if (wpa_auth->cb.set_key == NULL)
763 0 : return -1;
764 450 : return wpa_auth->cb.set_key(wpa_auth->cb.ctx, vlan_id, alg, addr, idx,
765 : key, key_len);
766 : }
767 :
768 :
769 450 : void wpa_ft_install_ptk(struct wpa_state_machine *sm)
770 : {
771 : enum wpa_alg alg;
772 : int klen;
773 :
774 : /* MLME-SETKEYS.request(PTK) */
775 450 : alg = wpa_cipher_to_alg(sm->pairwise);
776 450 : klen = wpa_cipher_key_len(sm->pairwise);
777 450 : if (!wpa_cipher_valid_pairwise(sm->pairwise)) {
778 0 : wpa_printf(MSG_DEBUG, "FT: Unknown pairwise alg 0x%x - skip "
779 : "PTK configuration", sm->pairwise);
780 0 : return;
781 : }
782 :
783 : /* FIX: add STA entry to kernel/driver here? The set_key will fail
784 : * most likely without this.. At the moment, STA entry is added only
785 : * after association has been completed. This function will be called
786 : * again after association to get the PTK configured, but that could be
787 : * optimized by adding the STA entry earlier.
788 : */
789 900 : if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
790 450 : sm->PTK.tk, klen))
791 16 : return;
792 :
793 : /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
794 434 : sm->pairwise_set = TRUE;
795 : }
796 :
797 :
798 238 : static int wpa_ft_process_auth_req(struct wpa_state_machine *sm,
799 : const u8 *ies, size_t ies_len,
800 : u8 **resp_ies, size_t *resp_ies_len)
801 : {
802 : struct rsn_mdie *mdie;
803 : struct rsn_ftie *ftie;
804 : u8 pmk_r1[PMK_LEN], pmk_r1_name[WPA_PMK_NAME_LEN];
805 : u8 ptk_name[WPA_PMK_NAME_LEN];
806 : struct wpa_auth_config *conf;
807 : struct wpa_ft_ies parse;
808 : size_t buflen;
809 : int ret;
810 : u8 *pos, *end;
811 : int pairwise;
812 :
813 238 : *resp_ies = NULL;
814 238 : *resp_ies_len = 0;
815 :
816 238 : sm->pmk_r1_name_valid = 0;
817 238 : conf = &sm->wpa_auth->conf;
818 :
819 238 : wpa_hexdump(MSG_DEBUG, "FT: Received authentication frame IEs",
820 : ies, ies_len);
821 :
822 238 : if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) {
823 0 : wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs");
824 0 : return WLAN_STATUS_UNSPECIFIED_FAILURE;
825 : }
826 :
827 238 : mdie = (struct rsn_mdie *) parse.mdie;
828 476 : if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
829 238 : os_memcmp(mdie->mobility_domain,
830 : sm->wpa_auth->conf.mobility_domain,
831 : MOBILITY_DOMAIN_ID_LEN) != 0) {
832 0 : wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
833 0 : return WLAN_STATUS_INVALID_MDIE;
834 : }
835 :
836 238 : ftie = (struct rsn_ftie *) parse.ftie;
837 238 : if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
838 0 : wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
839 0 : return WLAN_STATUS_INVALID_FTIE;
840 : }
841 :
842 238 : os_memcpy(sm->SNonce, ftie->snonce, WPA_NONCE_LEN);
843 :
844 238 : if (parse.r0kh_id == NULL) {
845 0 : wpa_printf(MSG_DEBUG, "FT: Invalid FTIE - no R0KH-ID");
846 0 : return WLAN_STATUS_INVALID_FTIE;
847 : }
848 :
849 476 : wpa_hexdump(MSG_DEBUG, "FT: STA R0KH-ID",
850 238 : parse.r0kh_id, parse.r0kh_id_len);
851 238 : os_memcpy(sm->r0kh_id, parse.r0kh_id, parse.r0kh_id_len);
852 238 : sm->r0kh_id_len = parse.r0kh_id_len;
853 :
854 238 : if (parse.rsn_pmkid == NULL) {
855 0 : wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE");
856 0 : return WLAN_STATUS_INVALID_PMKID;
857 : }
858 :
859 238 : wpa_hexdump(MSG_DEBUG, "FT: Requested PMKR0Name",
860 238 : parse.rsn_pmkid, WPA_PMK_NAME_LEN);
861 238 : wpa_derive_pmk_r1_name(parse.rsn_pmkid,
862 238 : sm->wpa_auth->conf.r1_key_holder, sm->addr,
863 : pmk_r1_name);
864 238 : wpa_hexdump(MSG_DEBUG, "FT: Derived requested PMKR1Name",
865 : pmk_r1_name, WPA_PMK_NAME_LEN);
866 :
867 238 : if (wpa_ft_fetch_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1_name, pmk_r1,
868 : &pairwise) < 0) {
869 11 : if (wpa_ft_pull_pmk_r1(sm, ies, ies_len, parse.rsn_pmkid) < 0) {
870 1 : wpa_printf(MSG_DEBUG, "FT: Did not have matching "
871 : "PMK-R1 and unknown R0KH-ID");
872 1 : return WLAN_STATUS_INVALID_PMKID;
873 : }
874 :
875 10 : return -1; /* Status pending */
876 : }
877 :
878 227 : wpa_hexdump_key(MSG_DEBUG, "FT: Selected PMK-R1", pmk_r1, PMK_LEN);
879 227 : sm->pmk_r1_name_valid = 1;
880 227 : os_memcpy(sm->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN);
881 :
882 227 : if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) {
883 0 : wpa_printf(MSG_DEBUG, "FT: Failed to get random data for "
884 : "ANonce");
885 0 : return WLAN_STATUS_UNSPECIFIED_FAILURE;
886 : }
887 :
888 227 : wpa_hexdump(MSG_DEBUG, "FT: Received SNonce",
889 227 : sm->SNonce, WPA_NONCE_LEN);
890 227 : wpa_hexdump(MSG_DEBUG, "FT: Generated ANonce",
891 227 : sm->ANonce, WPA_NONCE_LEN);
892 :
893 454 : if (wpa_pmk_r1_to_ptk(pmk_r1, sm->SNonce, sm->ANonce, sm->addr,
894 227 : sm->wpa_auth->addr, pmk_r1_name,
895 : &sm->PTK, ptk_name, sm->wpa_key_mgmt,
896 : pairwise) < 0)
897 0 : return WLAN_STATUS_UNSPECIFIED_FAILURE;
898 :
899 227 : sm->pairwise = pairwise;
900 227 : sm->PTK_valid = TRUE;
901 227 : wpa_ft_install_ptk(sm);
902 :
903 227 : buflen = 2 + sizeof(struct rsn_mdie) + 2 + sizeof(struct rsn_ftie) +
904 : 2 + FT_R1KH_ID_LEN + 200;
905 227 : *resp_ies = os_zalloc(buflen);
906 227 : if (*resp_ies == NULL) {
907 0 : return WLAN_STATUS_UNSPECIFIED_FAILURE;
908 : }
909 :
910 227 : pos = *resp_ies;
911 227 : end = *resp_ies + buflen;
912 :
913 227 : ret = wpa_write_rsn_ie(conf, pos, end - pos, parse.rsn_pmkid);
914 227 : if (ret < 0) {
915 0 : os_free(*resp_ies);
916 0 : *resp_ies = NULL;
917 0 : return WLAN_STATUS_UNSPECIFIED_FAILURE;
918 : }
919 227 : pos += ret;
920 :
921 227 : ret = wpa_write_mdie(conf, pos, end - pos);
922 227 : if (ret < 0) {
923 0 : os_free(*resp_ies);
924 0 : *resp_ies = NULL;
925 0 : return WLAN_STATUS_UNSPECIFIED_FAILURE;
926 : }
927 227 : pos += ret;
928 :
929 454 : ret = wpa_write_ftie(conf, parse.r0kh_id, parse.r0kh_id_len,
930 454 : sm->ANonce, sm->SNonce, pos, end - pos, NULL, 0);
931 227 : if (ret < 0) {
932 0 : os_free(*resp_ies);
933 0 : *resp_ies = NULL;
934 0 : return WLAN_STATUS_UNSPECIFIED_FAILURE;
935 : }
936 227 : pos += ret;
937 :
938 227 : *resp_ies_len = pos - *resp_ies;
939 :
940 227 : return WLAN_STATUS_SUCCESS;
941 : }
942 :
943 :
944 122 : void wpa_ft_process_auth(struct wpa_state_machine *sm, const u8 *bssid,
945 : u16 auth_transaction, const u8 *ies, size_t ies_len,
946 : void (*cb)(void *ctx, const u8 *dst, const u8 *bssid,
947 : u16 auth_transaction, u16 status,
948 : const u8 *ies, size_t ies_len),
949 : void *ctx)
950 : {
951 : u16 status;
952 : u8 *resp_ies;
953 : size_t resp_ies_len;
954 : int res;
955 :
956 122 : if (sm == NULL) {
957 0 : wpa_printf(MSG_DEBUG, "FT: Received authentication frame, but "
958 : "WPA SM not available");
959 0 : return;
960 : }
961 :
962 1586 : wpa_printf(MSG_DEBUG, "FT: Received authentication frame: STA=" MACSTR
963 : " BSSID=" MACSTR " transaction=%d",
964 1464 : MAC2STR(sm->addr), MAC2STR(bssid), auth_transaction);
965 122 : sm->ft_pending_cb = cb;
966 122 : sm->ft_pending_cb_ctx = ctx;
967 122 : sm->ft_pending_auth_transaction = auth_transaction;
968 122 : res = wpa_ft_process_auth_req(sm, ies, ies_len, &resp_ies,
969 : &resp_ies_len);
970 122 : if (res < 0) {
971 5 : wpa_printf(MSG_DEBUG, "FT: Callback postponed until response is available");
972 5 : return;
973 : }
974 117 : status = res;
975 :
976 819 : wpa_printf(MSG_DEBUG, "FT: FT authentication response: dst=" MACSTR
977 : " auth_transaction=%d status=%d",
978 702 : MAC2STR(sm->addr), auth_transaction + 1, status);
979 117 : wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len);
980 117 : cb(ctx, sm->addr, bssid, auth_transaction + 1, status,
981 : resp_ies, resp_ies_len);
982 117 : os_free(resp_ies);
983 : }
984 :
985 :
986 224 : u16 wpa_ft_validate_reassoc(struct wpa_state_machine *sm, const u8 *ies,
987 : size_t ies_len)
988 : {
989 : struct wpa_ft_ies parse;
990 : struct rsn_mdie *mdie;
991 : struct rsn_ftie *ftie;
992 : u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN];
993 224 : size_t mic_len = 16;
994 : unsigned int count;
995 :
996 224 : if (sm == NULL)
997 0 : return WLAN_STATUS_UNSPECIFIED_FAILURE;
998 :
999 224 : wpa_hexdump(MSG_DEBUG, "FT: Reassoc Req IEs", ies, ies_len);
1000 :
1001 224 : if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) {
1002 0 : wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs");
1003 0 : return WLAN_STATUS_UNSPECIFIED_FAILURE;
1004 : }
1005 :
1006 224 : if (parse.rsn == NULL) {
1007 0 : wpa_printf(MSG_DEBUG, "FT: No RSNIE in Reassoc Req");
1008 0 : return WLAN_STATUS_UNSPECIFIED_FAILURE;
1009 : }
1010 :
1011 224 : if (parse.rsn_pmkid == NULL) {
1012 0 : wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE");
1013 0 : return WLAN_STATUS_INVALID_PMKID;
1014 : }
1015 :
1016 224 : if (os_memcmp_const(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN)
1017 : != 0) {
1018 1 : wpa_printf(MSG_DEBUG, "FT: PMKID in Reassoc Req did not match "
1019 : "with the PMKR1Name derived from auth request");
1020 1 : return WLAN_STATUS_INVALID_PMKID;
1021 : }
1022 :
1023 223 : mdie = (struct rsn_mdie *) parse.mdie;
1024 446 : if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
1025 223 : os_memcmp(mdie->mobility_domain,
1026 : sm->wpa_auth->conf.mobility_domain,
1027 : MOBILITY_DOMAIN_ID_LEN) != 0) {
1028 0 : wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
1029 0 : return WLAN_STATUS_INVALID_MDIE;
1030 : }
1031 :
1032 223 : ftie = (struct rsn_ftie *) parse.ftie;
1033 223 : if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
1034 0 : wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
1035 0 : return WLAN_STATUS_INVALID_FTIE;
1036 : }
1037 :
1038 223 : if (os_memcmp(ftie->snonce, sm->SNonce, WPA_NONCE_LEN) != 0) {
1039 0 : wpa_printf(MSG_DEBUG, "FT: SNonce mismatch in FTIE");
1040 0 : wpa_hexdump(MSG_DEBUG, "FT: Received SNonce",
1041 0 : ftie->snonce, WPA_NONCE_LEN);
1042 0 : wpa_hexdump(MSG_DEBUG, "FT: Expected SNonce",
1043 0 : sm->SNonce, WPA_NONCE_LEN);
1044 0 : return -1;
1045 : }
1046 :
1047 223 : if (os_memcmp(ftie->anonce, sm->ANonce, WPA_NONCE_LEN) != 0) {
1048 0 : wpa_printf(MSG_DEBUG, "FT: ANonce mismatch in FTIE");
1049 0 : wpa_hexdump(MSG_DEBUG, "FT: Received ANonce",
1050 0 : ftie->anonce, WPA_NONCE_LEN);
1051 0 : wpa_hexdump(MSG_DEBUG, "FT: Expected ANonce",
1052 0 : sm->ANonce, WPA_NONCE_LEN);
1053 0 : return -1;
1054 : }
1055 :
1056 :
1057 223 : if (parse.r0kh_id == NULL) {
1058 0 : wpa_printf(MSG_DEBUG, "FT: No R0KH-ID subelem in FTIE");
1059 0 : return -1;
1060 : }
1061 :
1062 446 : if (parse.r0kh_id_len != sm->r0kh_id_len ||
1063 223 : os_memcmp_const(parse.r0kh_id, sm->r0kh_id, parse.r0kh_id_len) != 0)
1064 : {
1065 0 : wpa_printf(MSG_DEBUG, "FT: R0KH-ID in FTIE did not match with "
1066 : "the current R0KH-ID");
1067 0 : wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID in FTIE",
1068 0 : parse.r0kh_id, parse.r0kh_id_len);
1069 0 : wpa_hexdump(MSG_DEBUG, "FT: The current R0KH-ID",
1070 0 : sm->r0kh_id, sm->r0kh_id_len);
1071 0 : return -1;
1072 : }
1073 :
1074 223 : if (parse.r1kh_id == NULL) {
1075 0 : wpa_printf(MSG_DEBUG, "FT: No R1KH-ID subelem in FTIE");
1076 0 : return -1;
1077 : }
1078 :
1079 223 : if (os_memcmp_const(parse.r1kh_id, sm->wpa_auth->conf.r1_key_holder,
1080 : FT_R1KH_ID_LEN) != 0) {
1081 0 : wpa_printf(MSG_DEBUG, "FT: Unknown R1KH-ID used in "
1082 : "ReassocReq");
1083 0 : wpa_hexdump(MSG_DEBUG, "FT: R1KH-ID in FTIE",
1084 0 : parse.r1kh_id, FT_R1KH_ID_LEN);
1085 0 : wpa_hexdump(MSG_DEBUG, "FT: Expected R1KH-ID",
1086 0 : sm->wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN);
1087 0 : return -1;
1088 : }
1089 :
1090 446 : if (parse.rsn_pmkid == NULL ||
1091 223 : os_memcmp_const(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN))
1092 : {
1093 0 : wpa_printf(MSG_DEBUG, "FT: No matching PMKR1Name (PMKID) in "
1094 0 : "RSNIE (pmkid=%d)", !!parse.rsn_pmkid);
1095 0 : return -1;
1096 : }
1097 :
1098 223 : count = 3;
1099 223 : if (parse.ric)
1100 0 : count += ieee802_11_ie_count(parse.ric, parse.ric_len);
1101 223 : if (ftie->mic_control[1] != count) {
1102 0 : wpa_printf(MSG_DEBUG, "FT: Unexpected IE count in MIC "
1103 : "Control: received %u expected %u",
1104 0 : ftie->mic_control[1], count);
1105 0 : return -1;
1106 : }
1107 :
1108 1784 : if (wpa_ft_mic(sm->PTK.kck, sm->PTK.kck_len, sm->addr,
1109 223 : sm->wpa_auth->addr, 5,
1110 446 : parse.mdie - 2, parse.mdie_len + 2,
1111 446 : parse.ftie - 2, parse.ftie_len + 2,
1112 446 : parse.rsn - 2, parse.rsn_len + 2,
1113 : parse.ric, parse.ric_len,
1114 : mic) < 0) {
1115 0 : wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC");
1116 0 : return WLAN_STATUS_UNSPECIFIED_FAILURE;
1117 : }
1118 :
1119 223 : if (os_memcmp_const(mic, ftie->mic, mic_len) != 0) {
1120 0 : wpa_printf(MSG_DEBUG, "FT: Invalid MIC in FTIE");
1121 0 : wpa_printf(MSG_DEBUG, "FT: addr=" MACSTR " auth_addr=" MACSTR,
1122 0 : MAC2STR(sm->addr), MAC2STR(sm->wpa_auth->addr));
1123 0 : wpa_hexdump(MSG_MSGDUMP, "FT: Received MIC",
1124 0 : ftie->mic, mic_len);
1125 0 : wpa_hexdump(MSG_MSGDUMP, "FT: Calculated MIC", mic, mic_len);
1126 0 : wpa_hexdump(MSG_MSGDUMP, "FT: MDIE",
1127 0 : parse.mdie - 2, parse.mdie_len + 2);
1128 0 : wpa_hexdump(MSG_MSGDUMP, "FT: FTIE",
1129 0 : parse.ftie - 2, parse.ftie_len + 2);
1130 0 : wpa_hexdump(MSG_MSGDUMP, "FT: RSN",
1131 0 : parse.rsn - 2, parse.rsn_len + 2);
1132 0 : return WLAN_STATUS_INVALID_FTIE;
1133 : }
1134 :
1135 223 : return WLAN_STATUS_SUCCESS;
1136 : }
1137 :
1138 :
1139 114 : int wpa_ft_action_rx(struct wpa_state_machine *sm, const u8 *data, size_t len)
1140 : {
1141 : const u8 *sta_addr, *target_ap;
1142 : const u8 *ies;
1143 : size_t ies_len;
1144 : u8 action;
1145 : struct ft_rrb_frame *frame;
1146 :
1147 114 : if (sm == NULL)
1148 0 : return -1;
1149 :
1150 : /*
1151 : * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6]
1152 : * FT Request action frame body[variable]
1153 : */
1154 :
1155 114 : if (len < 14) {
1156 0 : wpa_printf(MSG_DEBUG, "FT: Too short FT Action frame "
1157 : "(len=%lu)", (unsigned long) len);
1158 0 : return -1;
1159 : }
1160 :
1161 114 : action = data[1];
1162 114 : sta_addr = data + 2;
1163 114 : target_ap = data + 8;
1164 114 : ies = data + 14;
1165 114 : ies_len = len - 14;
1166 :
1167 1482 : wpa_printf(MSG_DEBUG, "FT: Received FT Action frame (STA=" MACSTR
1168 : " Target AP=" MACSTR " Action=%d)",
1169 1368 : MAC2STR(sta_addr), MAC2STR(target_ap), action);
1170 :
1171 114 : if (os_memcmp(sta_addr, sm->addr, ETH_ALEN) != 0) {
1172 0 : wpa_printf(MSG_DEBUG, "FT: Mismatch in FT Action STA address: "
1173 : "STA=" MACSTR " STA-Address=" MACSTR,
1174 0 : MAC2STR(sm->addr), MAC2STR(sta_addr));
1175 0 : return -1;
1176 : }
1177 :
1178 : /*
1179 : * Do some sanity checking on the target AP address (not own and not
1180 : * broadcast. This could be extended to filter based on a list of known
1181 : * APs in the MD (if such a list were configured).
1182 : */
1183 228 : if ((target_ap[0] & 0x01) ||
1184 114 : os_memcmp(target_ap, sm->wpa_auth->addr, ETH_ALEN) == 0) {
1185 0 : wpa_printf(MSG_DEBUG, "FT: Invalid Target AP in FT Action "
1186 : "frame");
1187 0 : return -1;
1188 : }
1189 :
1190 114 : wpa_hexdump(MSG_MSGDUMP, "FT: Action frame body", ies, ies_len);
1191 :
1192 : /* RRB - Forward action frame to the target AP */
1193 114 : frame = os_malloc(sizeof(*frame) + len);
1194 114 : if (frame == NULL)
1195 0 : return -1;
1196 114 : frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1197 114 : frame->packet_type = FT_PACKET_REQUEST;
1198 114 : frame->action_length = host_to_le16(len);
1199 114 : os_memcpy(frame->ap_address, sm->wpa_auth->addr, ETH_ALEN);
1200 114 : os_memcpy(frame + 1, data, len);
1201 :
1202 114 : wpa_ft_rrb_send(sm->wpa_auth, target_ap, (u8 *) frame,
1203 : sizeof(*frame) + len);
1204 114 : os_free(frame);
1205 :
1206 114 : return 0;
1207 : }
1208 :
1209 :
1210 1 : static void wpa_ft_rrb_rx_request_cb(void *ctx, const u8 *dst, const u8 *bssid,
1211 : u16 auth_transaction, u16 resp,
1212 : const u8 *ies, size_t ies_len)
1213 : {
1214 1 : struct wpa_state_machine *sm = ctx;
1215 6 : wpa_printf(MSG_DEBUG, "FT: Over-the-DS RX request cb for " MACSTR,
1216 6 : MAC2STR(sm->addr));
1217 1 : wpa_ft_send_rrb_auth_resp(sm, sm->ft_pending_current_ap, sm->addr,
1218 : WLAN_STATUS_SUCCESS, ies, ies_len);
1219 1 : }
1220 :
1221 :
1222 113 : static int wpa_ft_rrb_rx_request(struct wpa_authenticator *wpa_auth,
1223 : const u8 *current_ap, const u8 *sta_addr,
1224 : const u8 *body, size_t len)
1225 : {
1226 : struct wpa_state_machine *sm;
1227 : u16 status;
1228 : u8 *resp_ies;
1229 : size_t resp_ies_len;
1230 : int res;
1231 :
1232 113 : sm = wpa_ft_add_sta(wpa_auth, sta_addr);
1233 113 : if (sm == NULL) {
1234 0 : wpa_printf(MSG_DEBUG, "FT: Failed to add new STA based on "
1235 : "RRB Request");
1236 0 : return -1;
1237 : }
1238 :
1239 113 : wpa_hexdump(MSG_MSGDUMP, "FT: RRB Request Frame body", body, len);
1240 :
1241 113 : sm->ft_pending_cb = wpa_ft_rrb_rx_request_cb;
1242 113 : sm->ft_pending_cb_ctx = sm;
1243 113 : os_memcpy(sm->ft_pending_current_ap, current_ap, ETH_ALEN);
1244 113 : res = wpa_ft_process_auth_req(sm, body, len, &resp_ies,
1245 : &resp_ies_len);
1246 113 : if (res < 0) {
1247 5 : wpa_printf(MSG_DEBUG, "FT: No immediate response available - wait for pull response");
1248 5 : return 0;
1249 : }
1250 108 : status = res;
1251 :
1252 108 : res = wpa_ft_send_rrb_auth_resp(sm, current_ap, sta_addr, status,
1253 : resp_ies, resp_ies_len);
1254 108 : os_free(resp_ies);
1255 108 : return res;
1256 : }
1257 :
1258 :
1259 109 : static int wpa_ft_send_rrb_auth_resp(struct wpa_state_machine *sm,
1260 : const u8 *current_ap, const u8 *sta_addr,
1261 : u16 status, const u8 *resp_ies,
1262 : size_t resp_ies_len)
1263 : {
1264 109 : struct wpa_authenticator *wpa_auth = sm->wpa_auth;
1265 : size_t rlen;
1266 : struct ft_rrb_frame *frame;
1267 : u8 *pos;
1268 :
1269 1417 : wpa_printf(MSG_DEBUG, "FT: RRB authentication response: STA=" MACSTR
1270 : " CurrentAP=" MACSTR " status=%d",
1271 1308 : MAC2STR(sm->addr), MAC2STR(current_ap), status);
1272 109 : wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len);
1273 :
1274 : /* RRB - Forward action frame response to the Current AP */
1275 :
1276 : /*
1277 : * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6]
1278 : * Status_Code[2] FT Request action frame body[variable]
1279 : */
1280 109 : rlen = 2 + 2 * ETH_ALEN + 2 + resp_ies_len;
1281 :
1282 109 : frame = os_malloc(sizeof(*frame) + rlen);
1283 109 : if (frame == NULL)
1284 0 : return -1;
1285 109 : frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1286 109 : frame->packet_type = FT_PACKET_RESPONSE;
1287 109 : frame->action_length = host_to_le16(rlen);
1288 109 : os_memcpy(frame->ap_address, wpa_auth->addr, ETH_ALEN);
1289 109 : pos = (u8 *) (frame + 1);
1290 109 : *pos++ = WLAN_ACTION_FT;
1291 109 : *pos++ = 2; /* Action: Response */
1292 109 : os_memcpy(pos, sta_addr, ETH_ALEN);
1293 109 : pos += ETH_ALEN;
1294 109 : os_memcpy(pos, wpa_auth->addr, ETH_ALEN);
1295 109 : pos += ETH_ALEN;
1296 109 : WPA_PUT_LE16(pos, status);
1297 109 : pos += 2;
1298 109 : if (resp_ies)
1299 108 : os_memcpy(pos, resp_ies, resp_ies_len);
1300 :
1301 109 : wpa_ft_rrb_send(wpa_auth, current_ap, (u8 *) frame,
1302 : sizeof(*frame) + rlen);
1303 109 : os_free(frame);
1304 :
1305 109 : return 0;
1306 : }
1307 :
1308 :
1309 10 : static int wpa_ft_rrb_rx_pull(struct wpa_authenticator *wpa_auth,
1310 : const u8 *src_addr,
1311 : const u8 *data, size_t data_len)
1312 : {
1313 : struct ft_r0kh_r1kh_pull_frame f;
1314 : const u8 *crypt;
1315 : u8 *plain;
1316 : struct ft_remote_r1kh *r1kh;
1317 : struct ft_r0kh_r1kh_resp_frame resp, r;
1318 : u8 pmk_r0[PMK_LEN];
1319 : int pairwise;
1320 :
1321 10 : wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull");
1322 :
1323 10 : if (data_len < sizeof(f))
1324 1 : return -1;
1325 :
1326 9 : r1kh = wpa_auth->conf.r1kh_list;
1327 19 : while (r1kh) {
1328 9 : if (os_memcmp(r1kh->addr, src_addr, ETH_ALEN) == 0)
1329 8 : break;
1330 1 : r1kh = r1kh->next;
1331 : }
1332 9 : if (r1kh == NULL) {
1333 6 : wpa_printf(MSG_DEBUG, "FT: No matching R1KH address found for "
1334 : "PMK-R1 pull source address " MACSTR,
1335 6 : MAC2STR(src_addr));
1336 1 : return -1;
1337 : }
1338 :
1339 8 : crypt = data + offsetof(struct ft_r0kh_r1kh_pull_frame, nonce);
1340 8 : os_memset(&f, 0, sizeof(f));
1341 8 : plain = ((u8 *) &f) + offsetof(struct ft_r0kh_r1kh_pull_frame, nonce);
1342 : /* aes_unwrap() does not support inplace decryption, so use a temporary
1343 : * buffer for the data. */
1344 8 : if (aes_unwrap(r1kh->key, sizeof(r1kh->key),
1345 : (FT_R0KH_R1KH_PULL_DATA_LEN + 7) / 8,
1346 : crypt, plain) < 0) {
1347 12 : wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 pull "
1348 12 : "request from " MACSTR, MAC2STR(src_addr));
1349 2 : return -1;
1350 : }
1351 :
1352 6 : wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - nonce",
1353 : f.nonce, sizeof(f.nonce));
1354 6 : wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - PMKR0Name",
1355 : f.pmk_r0_name, WPA_PMK_NAME_LEN);
1356 72 : wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull - R1KH-ID=" MACSTR " S1KH-ID="
1357 72 : MACSTR, MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id));
1358 :
1359 6 : os_memset(&resp, 0, sizeof(resp));
1360 6 : resp.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1361 6 : resp.packet_type = FT_PACKET_R0KH_R1KH_RESP;
1362 6 : resp.data_length = host_to_le16(FT_R0KH_R1KH_RESP_DATA_LEN);
1363 6 : os_memcpy(resp.ap_address, wpa_auth->addr, ETH_ALEN);
1364 :
1365 : /* aes_wrap() does not support inplace encryption, so use a temporary
1366 : * buffer for the data. */
1367 6 : os_memcpy(r.nonce, f.nonce, sizeof(f.nonce));
1368 6 : os_memcpy(r.r1kh_id, f.r1kh_id, FT_R1KH_ID_LEN);
1369 6 : os_memcpy(r.s1kh_id, f.s1kh_id, ETH_ALEN);
1370 6 : if (wpa_ft_fetch_pmk_r0(wpa_auth, f.s1kh_id, f.pmk_r0_name, pmk_r0,
1371 : &pairwise) < 0) {
1372 3 : wpa_printf(MSG_DEBUG, "FT: No matching PMKR0Name found for "
1373 : "PMK-R1 pull");
1374 3 : return -1;
1375 : }
1376 :
1377 3 : wpa_derive_pmk_r1(pmk_r0, f.pmk_r0_name, f.r1kh_id, f.s1kh_id,
1378 : r.pmk_r1, r.pmk_r1_name);
1379 3 : wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", r.pmk_r1, PMK_LEN);
1380 3 : wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", r.pmk_r1_name,
1381 : WPA_PMK_NAME_LEN);
1382 3 : r.pairwise = host_to_le16(pairwise);
1383 3 : os_memset(r.pad, 0, sizeof(r.pad));
1384 :
1385 3 : if (aes_wrap(r1kh->key, sizeof(r1kh->key),
1386 : (FT_R0KH_R1KH_RESP_DATA_LEN + 7) / 8,
1387 : r.nonce, resp.nonce) < 0) {
1388 0 : os_memset(pmk_r0, 0, PMK_LEN);
1389 0 : return -1;
1390 : }
1391 :
1392 3 : os_memset(pmk_r0, 0, PMK_LEN);
1393 :
1394 3 : wpa_ft_rrb_send(wpa_auth, src_addr, (u8 *) &resp, sizeof(resp));
1395 :
1396 3 : return 0;
1397 : }
1398 :
1399 :
1400 3 : static void ft_pull_resp_cb_finish(void *eloop_ctx, void *timeout_ctx)
1401 : {
1402 3 : struct wpa_state_machine *sm = eloop_ctx;
1403 : int res;
1404 : u8 *resp_ies;
1405 : size_t resp_ies_len;
1406 : u16 status;
1407 :
1408 3 : res = wpa_ft_process_auth_req(sm, wpabuf_head(sm->ft_pending_req_ies),
1409 3 : wpabuf_len(sm->ft_pending_req_ies),
1410 : &resp_ies, &resp_ies_len);
1411 3 : wpabuf_free(sm->ft_pending_req_ies);
1412 3 : sm->ft_pending_req_ies = NULL;
1413 3 : if (res < 0)
1414 0 : res = WLAN_STATUS_UNSPECIFIED_FAILURE;
1415 3 : status = res;
1416 21 : wpa_printf(MSG_DEBUG, "FT: Postponed auth callback result for " MACSTR
1417 18 : " - status %u", MAC2STR(sm->addr), status);
1418 :
1419 6 : sm->ft_pending_cb(sm->ft_pending_cb_ctx, sm->addr, sm->wpa_auth->addr,
1420 3 : sm->ft_pending_auth_transaction + 1, status,
1421 : resp_ies, resp_ies_len);
1422 3 : os_free(resp_ies);
1423 3 : }
1424 :
1425 :
1426 3 : static int ft_pull_resp_cb(struct wpa_state_machine *sm, void *ctx)
1427 : {
1428 3 : struct ft_r0kh_r1kh_resp_frame *frame = ctx;
1429 :
1430 3 : if (os_memcmp(frame->s1kh_id, sm->addr, ETH_ALEN) != 0)
1431 0 : return 0;
1432 3 : if (os_memcmp(frame->nonce, sm->ft_pending_pull_nonce,
1433 : FT_R0KH_R1KH_PULL_NONCE_LEN) != 0)
1434 0 : return 0;
1435 3 : if (sm->ft_pending_cb == NULL || sm->ft_pending_req_ies == NULL)
1436 0 : return 0;
1437 :
1438 18 : wpa_printf(MSG_DEBUG, "FT: Response to a pending pull request for "
1439 18 : MACSTR " - process from timeout", MAC2STR(sm->addr));
1440 3 : eloop_register_timeout(0, 0, ft_pull_resp_cb_finish, sm, NULL);
1441 3 : return 1;
1442 : }
1443 :
1444 :
1445 5 : static int wpa_ft_rrb_rx_resp(struct wpa_authenticator *wpa_auth,
1446 : const u8 *src_addr,
1447 : const u8 *data, size_t data_len)
1448 : {
1449 : struct ft_r0kh_r1kh_resp_frame f;
1450 : const u8 *crypt;
1451 : u8 *plain;
1452 : struct ft_remote_r0kh *r0kh;
1453 : int pairwise, res;
1454 :
1455 5 : wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull response");
1456 :
1457 5 : if (data_len < sizeof(f))
1458 1 : return -1;
1459 :
1460 4 : r0kh = wpa_auth->conf.r0kh_list;
1461 13 : while (r0kh) {
1462 8 : if (os_memcmp(r0kh->addr, src_addr, ETH_ALEN) == 0)
1463 3 : break;
1464 5 : r0kh = r0kh->next;
1465 : }
1466 4 : if (r0kh == NULL) {
1467 6 : wpa_printf(MSG_DEBUG, "FT: No matching R0KH address found for "
1468 : "PMK-R0 pull response source address " MACSTR,
1469 6 : MAC2STR(src_addr));
1470 1 : return -1;
1471 : }
1472 :
1473 3 : crypt = data + offsetof(struct ft_r0kh_r1kh_resp_frame, nonce);
1474 3 : os_memset(&f, 0, sizeof(f));
1475 3 : plain = ((u8 *) &f) + offsetof(struct ft_r0kh_r1kh_resp_frame, nonce);
1476 : /* aes_unwrap() does not support inplace decryption, so use a temporary
1477 : * buffer for the data. */
1478 3 : if (aes_unwrap(r0kh->key, sizeof(r0kh->key),
1479 : (FT_R0KH_R1KH_RESP_DATA_LEN + 7) / 8,
1480 : crypt, plain) < 0) {
1481 0 : wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 pull "
1482 0 : "response from " MACSTR, MAC2STR(src_addr));
1483 0 : return -1;
1484 : }
1485 :
1486 3 : if (os_memcmp_const(f.r1kh_id, wpa_auth->conf.r1_key_holder,
1487 : FT_R1KH_ID_LEN) != 0) {
1488 0 : wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull response did not use a "
1489 : "matching R1KH-ID");
1490 0 : return -1;
1491 : }
1492 :
1493 3 : pairwise = le_to_host16(f.pairwise);
1494 3 : wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - nonce",
1495 : f.nonce, sizeof(f.nonce));
1496 36 : wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull - R1KH-ID=" MACSTR " S1KH-ID="
1497 : MACSTR " pairwise=0x%x",
1498 36 : MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id), pairwise);
1499 3 : wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1 pull - PMK-R1",
1500 : f.pmk_r1, PMK_LEN);
1501 3 : wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - PMKR1Name",
1502 : f.pmk_r1_name, WPA_PMK_NAME_LEN);
1503 :
1504 3 : res = wpa_ft_store_pmk_r1(wpa_auth, f.s1kh_id, f.pmk_r1, f.pmk_r1_name,
1505 : pairwise);
1506 3 : wpa_printf(MSG_DEBUG, "FT: Look for pending pull request");
1507 3 : wpa_auth_for_each_sta(wpa_auth, ft_pull_resp_cb, &f);
1508 3 : os_memset(f.pmk_r1, 0, PMK_LEN);
1509 :
1510 3 : return res ? 0 : -1;
1511 : }
1512 :
1513 :
1514 25 : static int wpa_ft_rrb_rx_push(struct wpa_authenticator *wpa_auth,
1515 : const u8 *src_addr,
1516 : const u8 *data, size_t data_len)
1517 : {
1518 : struct ft_r0kh_r1kh_push_frame f;
1519 : const u8 *crypt;
1520 : u8 *plain;
1521 : struct ft_remote_r0kh *r0kh;
1522 : struct os_time now;
1523 : os_time_t tsend;
1524 : int pairwise;
1525 :
1526 25 : wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 push");
1527 :
1528 25 : if (data_len < sizeof(f))
1529 1 : return -1;
1530 :
1531 24 : r0kh = wpa_auth->conf.r0kh_list;
1532 73 : while (r0kh) {
1533 48 : if (os_memcmp(r0kh->addr, src_addr, ETH_ALEN) == 0)
1534 23 : break;
1535 25 : r0kh = r0kh->next;
1536 : }
1537 24 : if (r0kh == NULL) {
1538 6 : wpa_printf(MSG_DEBUG, "FT: No matching R0KH address found for "
1539 : "PMK-R0 push source address " MACSTR,
1540 6 : MAC2STR(src_addr));
1541 1 : return -1;
1542 : }
1543 :
1544 23 : crypt = data + offsetof(struct ft_r0kh_r1kh_push_frame, timestamp);
1545 23 : os_memset(&f, 0, sizeof(f));
1546 23 : plain = ((u8 *) &f) + offsetof(struct ft_r0kh_r1kh_push_frame,
1547 : timestamp);
1548 : /* aes_unwrap() does not support inplace decryption, so use a temporary
1549 : * buffer for the data. */
1550 23 : if (aes_unwrap(r0kh->key, sizeof(r0kh->key),
1551 : (FT_R0KH_R1KH_PUSH_DATA_LEN + 7) / 8,
1552 : crypt, plain) < 0) {
1553 6 : wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 push from "
1554 6 : MACSTR, MAC2STR(src_addr));
1555 1 : return -1;
1556 : }
1557 :
1558 22 : os_get_time(&now);
1559 22 : tsend = WPA_GET_LE32(f.timestamp);
1560 44 : if ((now.sec > tsend && now.sec - tsend > 60) ||
1561 22 : (now.sec < tsend && tsend - now.sec > 60)) {
1562 0 : wpa_printf(MSG_DEBUG, "FT: PMK-R1 push did not have a valid "
1563 : "timestamp: sender time %d own time %d\n",
1564 0 : (int) tsend, (int) now.sec);
1565 0 : return -1;
1566 : }
1567 :
1568 22 : if (os_memcmp_const(f.r1kh_id, wpa_auth->conf.r1_key_holder,
1569 : FT_R1KH_ID_LEN) != 0) {
1570 0 : wpa_printf(MSG_DEBUG, "FT: PMK-R1 push did not use a matching "
1571 : "R1KH-ID (received " MACSTR " own " MACSTR ")",
1572 0 : MAC2STR(f.r1kh_id),
1573 0 : MAC2STR(wpa_auth->conf.r1_key_holder));
1574 0 : return -1;
1575 : }
1576 :
1577 22 : pairwise = le_to_host16(f.pairwise);
1578 264 : wpa_printf(MSG_DEBUG, "FT: PMK-R1 push - R1KH-ID=" MACSTR " S1KH-ID="
1579 : MACSTR " pairwise=0x%x",
1580 264 : MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id), pairwise);
1581 22 : wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1 push - PMK-R1",
1582 : f.pmk_r1, PMK_LEN);
1583 22 : wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 push - PMKR1Name",
1584 : f.pmk_r1_name, WPA_PMK_NAME_LEN);
1585 :
1586 22 : wpa_ft_store_pmk_r1(wpa_auth, f.s1kh_id, f.pmk_r1, f.pmk_r1_name,
1587 : pairwise);
1588 22 : os_memset(f.pmk_r1, 0, PMK_LEN);
1589 :
1590 22 : return 0;
1591 : }
1592 :
1593 :
1594 273 : int wpa_ft_rrb_rx(struct wpa_authenticator *wpa_auth, const u8 *src_addr,
1595 : const u8 *data, size_t data_len)
1596 : {
1597 : struct ft_rrb_frame *frame;
1598 : u16 alen;
1599 : const u8 *pos, *end, *start;
1600 : u8 action;
1601 : const u8 *sta_addr, *target_ap_addr;
1602 :
1603 1638 : wpa_printf(MSG_DEBUG, "FT: RRB received frame from remote AP " MACSTR,
1604 1638 : MAC2STR(src_addr));
1605 :
1606 273 : if (data_len < sizeof(*frame)) {
1607 1 : wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (data_len=%lu)",
1608 : (unsigned long) data_len);
1609 1 : return -1;
1610 : }
1611 :
1612 272 : pos = data;
1613 272 : frame = (struct ft_rrb_frame *) pos;
1614 272 : pos += sizeof(*frame);
1615 :
1616 272 : alen = le_to_host16(frame->action_length);
1617 2176 : wpa_printf(MSG_DEBUG, "FT: RRB frame - frame_type=%d packet_type=%d "
1618 : "action_length=%d ap_address=" MACSTR,
1619 544 : frame->frame_type, frame->packet_type, alen,
1620 1632 : MAC2STR(frame->ap_address));
1621 :
1622 272 : if (frame->frame_type != RSN_REMOTE_FRAME_TYPE_FT_RRB) {
1623 : /* Discard frame per IEEE Std 802.11r-2008, 11A.10.3 */
1624 1 : wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with "
1625 1 : "unrecognized type %d", frame->frame_type);
1626 1 : return -1;
1627 : }
1628 :
1629 271 : if (alen > data_len - sizeof(*frame)) {
1630 1 : wpa_printf(MSG_DEBUG, "FT: RRB frame too short for action "
1631 : "frame");
1632 1 : return -1;
1633 : }
1634 :
1635 270 : if (frame->packet_type == FT_PACKET_R0KH_R1KH_PULL)
1636 10 : return wpa_ft_rrb_rx_pull(wpa_auth, src_addr, data, data_len);
1637 260 : if (frame->packet_type == FT_PACKET_R0KH_R1KH_RESP)
1638 5 : return wpa_ft_rrb_rx_resp(wpa_auth, src_addr, data, data_len);
1639 255 : if (frame->packet_type == FT_PACKET_R0KH_R1KH_PUSH)
1640 25 : return wpa_ft_rrb_rx_push(wpa_auth, src_addr, data, data_len);
1641 :
1642 230 : wpa_hexdump(MSG_MSGDUMP, "FT: RRB - FT Action frame", pos, alen);
1643 :
1644 230 : if (alen < 1 + 1 + 2 * ETH_ALEN) {
1645 1 : wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (not enough "
1646 : "room for Action Frame body); alen=%lu",
1647 : (unsigned long) alen);
1648 1 : return -1;
1649 : }
1650 229 : start = pos;
1651 229 : end = pos + alen;
1652 :
1653 229 : if (*pos != WLAN_ACTION_FT) {
1654 1 : wpa_printf(MSG_DEBUG, "FT: Unexpected Action frame category "
1655 1 : "%d", *pos);
1656 1 : return -1;
1657 : }
1658 :
1659 228 : pos++;
1660 228 : action = *pos++;
1661 228 : sta_addr = pos;
1662 228 : pos += ETH_ALEN;
1663 228 : target_ap_addr = pos;
1664 228 : pos += ETH_ALEN;
1665 2736 : wpa_printf(MSG_DEBUG, "FT: RRB Action Frame: action=%d sta_addr="
1666 : MACSTR " target_ap_addr=" MACSTR,
1667 2736 : action, MAC2STR(sta_addr), MAC2STR(target_ap_addr));
1668 :
1669 228 : if (frame->packet_type == FT_PACKET_REQUEST) {
1670 115 : wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Request");
1671 :
1672 115 : if (action != 1) {
1673 1 : wpa_printf(MSG_DEBUG, "FT: Unexpected Action %d in "
1674 : "RRB Request", action);
1675 1 : return -1;
1676 : }
1677 :
1678 114 : if (os_memcmp(target_ap_addr, wpa_auth->addr, ETH_ALEN) != 0) {
1679 1 : wpa_printf(MSG_DEBUG, "FT: Target AP address in the "
1680 : "RRB Request does not match with own "
1681 : "address");
1682 1 : return -1;
1683 : }
1684 :
1685 113 : if (wpa_ft_rrb_rx_request(wpa_auth, frame->ap_address,
1686 113 : sta_addr, pos, end - pos) < 0)
1687 0 : return -1;
1688 113 : } else if (frame->packet_type == FT_PACKET_RESPONSE) {
1689 : u16 status_code;
1690 :
1691 112 : if (end - pos < 2) {
1692 1 : wpa_printf(MSG_DEBUG, "FT: Not enough room for status "
1693 : "code in RRB Response");
1694 1 : return -1;
1695 : }
1696 111 : status_code = WPA_GET_LE16(pos);
1697 111 : pos += 2;
1698 :
1699 111 : wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Response "
1700 : "(status_code=%d)", status_code);
1701 :
1702 111 : if (wpa_ft_action_send(wpa_auth, sta_addr, start, alen) < 0)
1703 1 : return -1;
1704 : } else {
1705 1 : wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with unknown "
1706 1 : "packet_type %d", frame->packet_type);
1707 1 : return -1;
1708 : }
1709 :
1710 223 : if (end > pos) {
1711 222 : wpa_hexdump(MSG_DEBUG, "FT: Ignore extra data in end",
1712 222 : pos, end - pos);
1713 : }
1714 :
1715 223 : return 0;
1716 : }
1717 :
1718 :
1719 35 : static void wpa_ft_generate_pmk_r1(struct wpa_authenticator *wpa_auth,
1720 : struct wpa_ft_pmk_r0_sa *pmk_r0,
1721 : struct ft_remote_r1kh *r1kh,
1722 : const u8 *s1kh_id, int pairwise)
1723 : {
1724 : struct ft_r0kh_r1kh_push_frame frame, f;
1725 : struct os_time now;
1726 : const u8 *plain;
1727 : u8 *crypt;
1728 :
1729 35 : os_memset(&frame, 0, sizeof(frame));
1730 35 : frame.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1731 35 : frame.packet_type = FT_PACKET_R0KH_R1KH_PUSH;
1732 35 : frame.data_length = host_to_le16(FT_R0KH_R1KH_PUSH_DATA_LEN);
1733 35 : os_memcpy(frame.ap_address, wpa_auth->addr, ETH_ALEN);
1734 :
1735 : /* aes_wrap() does not support inplace encryption, so use a temporary
1736 : * buffer for the data. */
1737 35 : os_memcpy(f.r1kh_id, r1kh->id, FT_R1KH_ID_LEN);
1738 35 : os_memcpy(f.s1kh_id, s1kh_id, ETH_ALEN);
1739 35 : os_memcpy(f.pmk_r0_name, pmk_r0->pmk_r0_name, WPA_PMK_NAME_LEN);
1740 35 : wpa_derive_pmk_r1(pmk_r0->pmk_r0, pmk_r0->pmk_r0_name, r1kh->id,
1741 : s1kh_id, f.pmk_r1, f.pmk_r1_name);
1742 35 : wpa_printf(MSG_DEBUG, "FT: R1KH-ID " MACSTR, MAC2STR(r1kh->id));
1743 35 : wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", f.pmk_r1, PMK_LEN);
1744 35 : wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", f.pmk_r1_name,
1745 : WPA_PMK_NAME_LEN);
1746 35 : os_get_time(&now);
1747 35 : WPA_PUT_LE32(f.timestamp, now.sec);
1748 35 : f.pairwise = host_to_le16(pairwise);
1749 35 : os_memset(f.pad, 0, sizeof(f.pad));
1750 35 : plain = ((const u8 *) &f) + offsetof(struct ft_r0kh_r1kh_push_frame,
1751 : timestamp);
1752 35 : crypt = ((u8 *) &frame) + offsetof(struct ft_r0kh_r1kh_push_frame,
1753 : timestamp);
1754 35 : if (aes_wrap(r1kh->key, sizeof(r1kh->key),
1755 : (FT_R0KH_R1KH_PUSH_DATA_LEN + 7) / 8,
1756 : plain, crypt) < 0)
1757 35 : return;
1758 :
1759 35 : wpa_ft_rrb_send(wpa_auth, r1kh->addr, (u8 *) &frame, sizeof(frame));
1760 : }
1761 :
1762 :
1763 1559 : void wpa_ft_push_pmk_r1(struct wpa_authenticator *wpa_auth, const u8 *addr)
1764 : {
1765 : struct wpa_ft_pmk_r0_sa *r0;
1766 : struct ft_remote_r1kh *r1kh;
1767 :
1768 1559 : if (!wpa_auth->conf.pmk_r1_push)
1769 1524 : return;
1770 :
1771 35 : r0 = wpa_auth->ft_pmk_cache->pmk_r0;
1772 70 : while (r0) {
1773 35 : if (os_memcmp(r0->spa, addr, ETH_ALEN) == 0)
1774 35 : break;
1775 0 : r0 = r0->next;
1776 : }
1777 :
1778 35 : if (r0 == NULL || r0->pmk_r1_pushed)
1779 0 : return;
1780 35 : r0->pmk_r1_pushed = 1;
1781 :
1782 210 : wpa_printf(MSG_DEBUG, "FT: Deriving and pushing PMK-R1 keys to R1KHs "
1783 210 : "for STA " MACSTR, MAC2STR(addr));
1784 :
1785 35 : r1kh = wpa_auth->conf.r1kh_list;
1786 105 : while (r1kh) {
1787 35 : wpa_ft_generate_pmk_r1(wpa_auth, r0, r1kh, addr, r0->pairwise);
1788 35 : r1kh = r1kh->next;
1789 : }
1790 : }
1791 :
1792 : #endif /* CONFIG_IEEE80211R */
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