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 :
33 249 : static int wpa_ft_rrb_send(struct wpa_authenticator *wpa_auth, const u8 *dst,
34 : const u8 *data, size_t data_len)
35 : {
36 249 : if (wpa_auth->cb.send_ether == NULL)
37 0 : return -1;
38 249 : wpa_printf(MSG_DEBUG, "FT: RRB send to " MACSTR, MAC2STR(dst));
39 249 : return wpa_auth->cb.send_ether(wpa_auth->cb.ctx, dst, ETH_P_RRB,
40 : data, data_len);
41 : }
42 :
43 :
44 109 : static int wpa_ft_action_send(struct wpa_authenticator *wpa_auth,
45 : const u8 *dst, const u8 *data, size_t data_len)
46 : {
47 109 : if (wpa_auth->cb.send_ft_action == NULL)
48 0 : return -1;
49 109 : 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 :
76 510 : int wpa_write_mdie(struct wpa_auth_config *conf, u8 *buf, size_t len)
77 : {
78 510 : u8 *pos = buf;
79 : u8 capab;
80 510 : if (len < 2 + sizeof(struct rsn_mdie))
81 0 : return -1;
82 :
83 510 : *pos++ = WLAN_EID_MOBILITY_DOMAIN;
84 510 : *pos++ = MOBILITY_DOMAIN_ID_LEN + 1;
85 510 : os_memcpy(pos, conf->mobility_domain, MOBILITY_DOMAIN_ID_LEN);
86 510 : pos += MOBILITY_DOMAIN_ID_LEN;
87 510 : capab = 0;
88 510 : if (conf->ft_over_ds)
89 510 : capab |= RSN_FT_CAPAB_FT_OVER_DS;
90 510 : *pos++ = capab;
91 :
92 510 : return pos - buf;
93 : }
94 :
95 :
96 492 : 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 : {
102 492 : u8 *pos = buf, *ielen;
103 : struct rsn_ftie *hdr;
104 :
105 492 : if (len < 2 + sizeof(*hdr) + 2 + FT_R1KH_ID_LEN + 2 + r0kh_id_len +
106 : subelem_len)
107 0 : return -1;
108 :
109 492 : *pos++ = WLAN_EID_FAST_BSS_TRANSITION;
110 492 : ielen = pos++;
111 :
112 492 : hdr = (struct rsn_ftie *) pos;
113 492 : os_memset(hdr, 0, sizeof(*hdr));
114 492 : pos += sizeof(*hdr);
115 492 : WPA_PUT_LE16(hdr->mic_control, 0);
116 492 : if (anonce)
117 442 : os_memcpy(hdr->anonce, anonce, WPA_NONCE_LEN);
118 492 : if (snonce)
119 442 : os_memcpy(hdr->snonce, snonce, WPA_NONCE_LEN);
120 :
121 : /* Optional Parameters */
122 492 : *pos++ = FTIE_SUBELEM_R1KH_ID;
123 492 : *pos++ = FT_R1KH_ID_LEN;
124 492 : os_memcpy(pos, conf->r1_key_holder, FT_R1KH_ID_LEN);
125 492 : pos += FT_R1KH_ID_LEN;
126 :
127 492 : if (r0kh_id) {
128 492 : *pos++ = FTIE_SUBELEM_R0KH_ID;
129 492 : *pos++ = r0kh_id_len;
130 492 : os_memcpy(pos, r0kh_id, r0kh_id_len);
131 492 : pos += r0kh_id_len;
132 : }
133 :
134 492 : if (subelem) {
135 221 : os_memcpy(pos, subelem, subelem_len);
136 221 : pos += subelem_len;
137 : }
138 :
139 492 : *ielen = pos - buf - 2;
140 :
141 492 : 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 :
169 990 : struct wpa_ft_pmk_cache * wpa_ft_pmk_cache_init(void)
170 : {
171 : struct wpa_ft_pmk_cache *cache;
172 :
173 990 : cache = os_zalloc(sizeof(*cache));
174 :
175 990 : return cache;
176 : }
177 :
178 :
179 990 : 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 :
184 990 : r0 = cache->pmk_r0;
185 2005 : while (r0) {
186 25 : r0prev = r0;
187 25 : r0 = r0->next;
188 25 : os_memset(r0prev->pmk_r0, 0, PMK_LEN);
189 25 : os_free(r0prev);
190 : }
191 :
192 990 : r1 = cache->pmk_r1;
193 2020 : while (r1) {
194 40 : r1prev = r1;
195 40 : r1 = r1->next;
196 40 : os_memset(r1prev->pmk_r1, 0, PMK_LEN);
197 40 : os_free(r1prev);
198 : }
199 :
200 990 : os_free(cache);
201 990 : }
202 :
203 :
204 25 : 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 25 : 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 25 : r0 = os_zalloc(sizeof(*r0));
214 25 : if (r0 == NULL)
215 0 : return -1;
216 :
217 25 : os_memcpy(r0->pmk_r0, pmk_r0, PMK_LEN);
218 25 : os_memcpy(r0->pmk_r0_name, pmk_r0_name, WPA_PMK_NAME_LEN);
219 25 : os_memcpy(r0->spa, spa, ETH_ALEN);
220 25 : r0->pairwise = pairwise;
221 :
222 25 : r0->next = cache->pmk_r0;
223 25 : cache->pmk_r0 = r0;
224 :
225 25 : return 0;
226 : }
227 :
228 :
229 3 : 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 3 : struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
234 : struct wpa_ft_pmk_r0_sa *r0;
235 :
236 3 : r0 = cache->pmk_r0;
237 6 : while (r0) {
238 6 : if (os_memcmp(r0->spa, spa, ETH_ALEN) == 0 &&
239 3 : 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 0 : r0 = r0->next;
248 : }
249 :
250 0 : return -1;
251 : }
252 :
253 :
254 40 : 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 40 : 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 40 : r1 = os_zalloc(sizeof(*r1));
264 40 : if (r1 == NULL)
265 0 : return -1;
266 :
267 40 : os_memcpy(r1->pmk_r1, pmk_r1, PMK_LEN);
268 40 : os_memcpy(r1->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN);
269 40 : os_memcpy(r1->spa, spa, ETH_ALEN);
270 40 : r1->pairwise = pairwise;
271 :
272 40 : r1->next = cache->pmk_r1;
273 40 : cache->pmk_r1 = r1;
274 :
275 40 : return 0;
276 : }
277 :
278 :
279 229 : 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 : {
283 229 : struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
284 : struct wpa_ft_pmk_r1_sa *r1;
285 :
286 229 : r1 = cache->pmk_r1;
287 458 : while (r1) {
288 442 : if (os_memcmp(r1->spa, spa, ETH_ALEN) == 0 &&
289 221 : os_memcmp_const(r1->pmk_r1_name, pmk_r1_name,
290 : WPA_PMK_NAME_LEN) == 0) {
291 221 : os_memcpy(pmk_r1, r1->pmk_r1, PMK_LEN);
292 221 : if (pairwise)
293 221 : *pairwise = r1->pairwise;
294 221 : return 0;
295 : }
296 :
297 0 : r1 = r1->next;
298 : }
299 :
300 8 : return -1;
301 : }
302 :
303 :
304 8 : 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 8 : r0kh = sm->wpa_auth->conf.r0kh_list;
312 25 : while (r0kh) {
313 32 : if (r0kh->id_len == sm->r0kh_id_len &&
314 16 : os_memcmp_const(r0kh->id, sm->r0kh_id, sm->r0kh_id_len) ==
315 : 0)
316 7 : break;
317 9 : r0kh = r0kh->next;
318 : }
319 8 : 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 42 : wpa_printf(MSG_DEBUG, "FT: Send PMK-R1 pull request to remote R0KH "
326 42 : "address " MACSTR, MAC2STR(r0kh->addr));
327 :
328 7 : os_memset(&frame, 0, sizeof(frame));
329 7 : frame.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
330 7 : frame.packet_type = FT_PACKET_R0KH_R1KH_PULL;
331 7 : frame.data_length = host_to_le16(FT_R0KH_R1KH_PULL_DATA_LEN);
332 7 : 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 7 : 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 7 : os_memcpy(sm->ft_pending_pull_nonce, f.nonce,
342 : FT_R0KH_R1KH_PULL_NONCE_LEN);
343 7 : os_memcpy(f.pmk_r0_name, pmk_r0_name, WPA_PMK_NAME_LEN);
344 7 : os_memcpy(f.r1kh_id, sm->wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN);
345 7 : os_memcpy(f.s1kh_id, sm->addr, ETH_ALEN);
346 7 : os_memset(f.pad, 0, sizeof(f.pad));
347 :
348 7 : 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 7 : wpabuf_free(sm->ft_pending_req_ies);
354 7 : sm->ft_pending_req_ies = wpabuf_alloc_copy(ies, ies_len);
355 7 : if (sm->ft_pending_req_ies == NULL)
356 0 : return -1;
357 :
358 7 : wpa_ft_rrb_send(sm->wpa_auth, r0kh->addr, (u8 *) &frame, sizeof(frame));
359 :
360 7 : return 0;
361 : }
362 :
363 :
364 25 : 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 25 : const u8 *mdid = sm->wpa_auth->conf.mobility_domain;
371 25 : const u8 *r0kh = sm->wpa_auth->conf.r0_key_holder;
372 25 : size_t r0kh_len = sm->wpa_auth->conf.r0_key_holder_len;
373 25 : const u8 *r1kh = sm->wpa_auth->conf.r1_key_holder;
374 25 : const u8 *ssid = sm->wpa_auth->conf.ssid;
375 25 : size_t ssid_len = sm->wpa_auth->conf.ssid_len;
376 :
377 25 : 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 25 : wpa_derive_pmk_r0(sm->xxkey, sm->xxkey_len, ssid, ssid_len, mdid,
384 25 : r0kh, r0kh_len, sm->addr, pmk_r0, pmk_r0_name);
385 25 : wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R0", pmk_r0, PMK_LEN);
386 25 : wpa_hexdump(MSG_DEBUG, "FT: PMKR0Name", pmk_r0_name, WPA_PMK_NAME_LEN);
387 25 : wpa_ft_store_pmk_r0(sm->wpa_auth, sm->addr, pmk_r0, pmk_r0_name,
388 : sm->pairwise);
389 :
390 25 : wpa_derive_pmk_r1(pmk_r0, pmk_r0_name, r1kh, sm->addr,
391 25 : pmk_r1, sm->pmk_r1_name);
392 25 : wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", pmk_r1, PMK_LEN);
393 25 : wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", sm->pmk_r1_name,
394 : WPA_PMK_NAME_LEN);
395 25 : wpa_ft_store_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1, sm->pmk_r1_name,
396 : sm->pairwise);
397 :
398 50 : return wpa_pmk_r1_to_ptk(pmk_r1, sm->SNonce, sm->ANonce, sm->addr,
399 25 : sm->wpa_auth->addr, sm->pmk_r1_name,
400 : ptk, ptk_name, sm->wpa_key_mgmt, sm->pairwise);
401 : }
402 :
403 :
404 225 : static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
405 : const u8 *addr, int idx, u8 *seq)
406 : {
407 225 : if (wpa_auth->cb.get_seqnum == NULL)
408 0 : return -1;
409 225 : return wpa_auth->cb.get_seqnum(wpa_auth->cb.ctx, addr, idx, seq);
410 : }
411 :
412 :
413 221 : static u8 * wpa_ft_gtk_subelem(struct wpa_state_machine *sm, size_t *len)
414 : {
415 : u8 *subelem;
416 221 : 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 :
422 221 : key_len = gsm->GTK_len;
423 221 : 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 : */
430 221 : pad_len = key_len % 8;
431 221 : if (pad_len)
432 0 : pad_len = 8 - pad_len;
433 221 : if (key_len + pad_len < 16)
434 0 : pad_len += 8;
435 221 : 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
442 221 : 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 : */
448 221 : subelem_len = 13 + key_len + 8;
449 221 : subelem = os_zalloc(subelem_len);
450 221 : if (subelem == NULL)
451 0 : return NULL;
452 :
453 221 : subelem[0] = FTIE_SUBELEM_GTK;
454 221 : subelem[1] = 11 + key_len + 8;
455 : /* Key ID in B0-B1 of Key Info */
456 221 : WPA_PUT_LE16(&subelem[2], gsm->GN & 0x03);
457 221 : subelem[4] = gsm->GTK_len;
458 221 : wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, subelem + 5);
459 221 : 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 :
465 221 : *len = subelem_len;
466 221 : 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 : #ifdef NEED_AP_MLME
538 0 : if (parse.wmm_tspec && sm->wpa_auth->conf.ap_mlme) {
539 : struct wmm_tspec_element *tspec;
540 : int res;
541 :
542 0 : if (parse.wmm_tspec_len + 2 < (int) sizeof(*tspec)) {
543 0 : wpa_printf(MSG_DEBUG, "FT: Too short WMM TSPEC IE "
544 0 : "(%d)", (int) parse.wmm_tspec_len);
545 0 : rdie->status_code =
546 : host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
547 0 : return pos;
548 : }
549 0 : if (end - pos < (int) sizeof(*tspec)) {
550 0 : wpa_printf(MSG_ERROR, "FT: Not enough room for "
551 : "response TSPEC");
552 0 : rdie->status_code =
553 : host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
554 0 : return pos;
555 : }
556 0 : tspec = (struct wmm_tspec_element *) pos;
557 0 : os_memcpy(tspec, parse.wmm_tspec - 2, sizeof(*tspec));
558 0 : res = wmm_process_tspec(tspec);
559 0 : wpa_printf(MSG_DEBUG, "FT: ADDTS processing result: %d", res);
560 0 : if (res == WMM_ADDTS_STATUS_INVALID_PARAMETERS)
561 0 : rdie->status_code =
562 : host_to_le16(WLAN_STATUS_INVALID_PARAMETERS);
563 0 : else if (res == WMM_ADDTS_STATUS_REFUSED)
564 0 : rdie->status_code =
565 : host_to_le16(WLAN_STATUS_REQUEST_DECLINED);
566 : else {
567 : /* TSPEC accepted; include updated TSPEC in response */
568 0 : rdie->descr_count = 1;
569 0 : pos += sizeof(*tspec);
570 : }
571 0 : return pos;
572 : }
573 : #endif /* NEED_AP_MLME */
574 :
575 0 : if (parse.wmm_tspec && !sm->wpa_auth->conf.ap_mlme) {
576 : struct wmm_tspec_element *tspec;
577 : int res;
578 :
579 0 : tspec = (struct wmm_tspec_element *) pos;
580 0 : os_memcpy(tspec, parse.wmm_tspec - 2, sizeof(*tspec));
581 0 : res = wpa_ft_add_tspec(sm->wpa_auth, sm->addr, pos,
582 : sizeof(*tspec));
583 0 : if (res >= 0) {
584 0 : if (res)
585 0 : rdie->status_code = host_to_le16(res);
586 : else {
587 : /* TSPEC accepted; include updated TSPEC in
588 : * response */
589 0 : rdie->descr_count = 1;
590 0 : pos += sizeof(*tspec);
591 : }
592 0 : return pos;
593 : }
594 : }
595 :
596 0 : wpa_printf(MSG_DEBUG, "FT: No supported resource requested");
597 0 : rdie->status_code = host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
598 0 : return pos;
599 : }
600 :
601 :
602 0 : static u8 * wpa_ft_process_ric(struct wpa_state_machine *sm, u8 *pos, u8 *end,
603 : const u8 *ric, size_t ric_len)
604 : {
605 : const u8 *rpos, *start;
606 : const struct rsn_rdie *rdie;
607 :
608 0 : wpa_hexdump(MSG_MSGDUMP, "FT: RIC Request", ric, ric_len);
609 :
610 0 : rpos = ric;
611 0 : while (rpos + sizeof(*rdie) < ric + ric_len) {
612 0 : if (rpos[0] != WLAN_EID_RIC_DATA || rpos[1] < sizeof(*rdie) ||
613 0 : rpos + 2 + rpos[1] > ric + ric_len)
614 : break;
615 0 : rdie = (const struct rsn_rdie *) (rpos + 2);
616 0 : rpos += 2 + rpos[1];
617 0 : start = rpos;
618 :
619 0 : while (rpos + 2 <= ric + ric_len &&
620 0 : rpos + 2 + rpos[1] <= ric + ric_len) {
621 0 : if (rpos[0] == WLAN_EID_RIC_DATA)
622 0 : break;
623 0 : rpos += 2 + rpos[1];
624 : }
625 0 : pos = wpa_ft_process_rdie(sm, pos, end, rdie->id,
626 0 : rdie->descr_count,
627 0 : start, rpos - start);
628 : }
629 :
630 0 : return pos;
631 : }
632 :
633 :
634 2553 : u8 * wpa_sm_write_assoc_resp_ies(struct wpa_state_machine *sm, u8 *pos,
635 : size_t max_len, int auth_alg,
636 : const u8 *req_ies, size_t req_ies_len)
637 : {
638 2553 : u8 *end, *mdie, *ftie, *rsnie = NULL, *r0kh_id, *subelem = NULL;
639 2553 : size_t mdie_len, ftie_len, rsnie_len = 0, r0kh_id_len, subelem_len = 0;
640 : int res;
641 : struct wpa_auth_config *conf;
642 : struct rsn_ftie *_ftie;
643 : struct wpa_ft_ies parse;
644 : u8 *ric_start;
645 : u8 *anonce, *snonce;
646 :
647 2553 : if (sm == NULL)
648 634 : return pos;
649 :
650 1919 : conf = &sm->wpa_auth->conf;
651 :
652 1919 : if (!wpa_key_mgmt_ft(sm->wpa_key_mgmt))
653 1673 : return pos;
654 :
655 246 : end = pos + max_len;
656 :
657 246 : if (auth_alg == WLAN_AUTH_FT) {
658 : /*
659 : * RSN (only present if this is a Reassociation Response and
660 : * part of a fast BSS transition)
661 : */
662 221 : res = wpa_write_rsn_ie(conf, pos, end - pos, sm->pmk_r1_name);
663 221 : if (res < 0)
664 0 : return pos;
665 221 : rsnie = pos;
666 221 : rsnie_len = res;
667 221 : pos += res;
668 : }
669 :
670 : /* Mobility Domain Information */
671 246 : res = wpa_write_mdie(conf, pos, end - pos);
672 246 : if (res < 0)
673 0 : return pos;
674 246 : mdie = pos;
675 246 : mdie_len = res;
676 246 : pos += res;
677 :
678 : /* Fast BSS Transition Information */
679 246 : if (auth_alg == WLAN_AUTH_FT) {
680 221 : subelem = wpa_ft_gtk_subelem(sm, &subelem_len);
681 221 : r0kh_id = sm->r0kh_id;
682 221 : r0kh_id_len = sm->r0kh_id_len;
683 221 : anonce = sm->ANonce;
684 221 : snonce = sm->SNonce;
685 : #ifdef CONFIG_IEEE80211W
686 221 : if (sm->mgmt_frame_prot) {
687 : u8 *igtk;
688 : size_t igtk_len;
689 : u8 *nbuf;
690 4 : igtk = wpa_ft_igtk_subelem(sm, &igtk_len);
691 4 : if (igtk == NULL) {
692 0 : os_free(subelem);
693 0 : return pos;
694 : }
695 4 : nbuf = os_realloc(subelem, subelem_len + igtk_len);
696 4 : if (nbuf == NULL) {
697 0 : os_free(subelem);
698 0 : os_free(igtk);
699 0 : return pos;
700 : }
701 4 : subelem = nbuf;
702 4 : os_memcpy(subelem + subelem_len, igtk, igtk_len);
703 4 : subelem_len += igtk_len;
704 4 : os_free(igtk);
705 : }
706 : #endif /* CONFIG_IEEE80211W */
707 : } else {
708 25 : r0kh_id = conf->r0_key_holder;
709 25 : r0kh_id_len = conf->r0_key_holder_len;
710 25 : anonce = NULL;
711 25 : snonce = NULL;
712 : }
713 492 : res = wpa_write_ftie(conf, r0kh_id, r0kh_id_len, anonce, snonce, pos,
714 246 : end - pos, subelem, subelem_len);
715 246 : os_free(subelem);
716 246 : if (res < 0)
717 0 : return pos;
718 246 : ftie = pos;
719 246 : ftie_len = res;
720 246 : pos += res;
721 :
722 246 : os_free(sm->assoc_resp_ftie);
723 246 : sm->assoc_resp_ftie = os_malloc(ftie_len);
724 246 : if (sm->assoc_resp_ftie)
725 246 : os_memcpy(sm->assoc_resp_ftie, ftie, ftie_len);
726 :
727 246 : _ftie = (struct rsn_ftie *) (ftie + 2);
728 246 : if (auth_alg == WLAN_AUTH_FT)
729 221 : _ftie->mic_control[1] = 3; /* Information element count */
730 :
731 246 : ric_start = pos;
732 246 : if (wpa_ft_parse_ies(req_ies, req_ies_len, &parse) == 0 && parse.ric) {
733 0 : pos = wpa_ft_process_ric(sm, pos, end, parse.ric,
734 : parse.ric_len);
735 0 : if (auth_alg == WLAN_AUTH_FT)
736 0 : _ftie->mic_control[1] +=
737 0 : ieee802_11_ie_count(ric_start,
738 0 : pos - ric_start);
739 : }
740 246 : if (ric_start == pos)
741 246 : ric_start = NULL;
742 :
743 467 : if (auth_alg == WLAN_AUTH_FT &&
744 442 : wpa_ft_mic(sm->PTK.kck, sm->PTK.kck_len, sm->addr,
745 221 : sm->wpa_auth->addr, 6,
746 : mdie, mdie_len, ftie, ftie_len,
747 : rsnie, rsnie_len,
748 0 : ric_start, ric_start ? pos - ric_start : 0,
749 221 : _ftie->mic) < 0)
750 0 : wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC");
751 :
752 246 : return pos;
753 : }
754 :
755 :
756 442 : static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
757 : int vlan_id,
758 : enum wpa_alg alg, const u8 *addr, int idx,
759 : u8 *key, size_t key_len)
760 : {
761 442 : if (wpa_auth->cb.set_key == NULL)
762 0 : return -1;
763 442 : return wpa_auth->cb.set_key(wpa_auth->cb.ctx, vlan_id, alg, addr, idx,
764 : key, key_len);
765 : }
766 :
767 :
768 442 : void wpa_ft_install_ptk(struct wpa_state_machine *sm)
769 : {
770 : enum wpa_alg alg;
771 : int klen;
772 :
773 : /* MLME-SETKEYS.request(PTK) */
774 442 : alg = wpa_cipher_to_alg(sm->pairwise);
775 442 : klen = wpa_cipher_key_len(sm->pairwise);
776 442 : if (!wpa_cipher_valid_pairwise(sm->pairwise)) {
777 0 : wpa_printf(MSG_DEBUG, "FT: Unknown pairwise alg 0x%x - skip "
778 : "PTK configuration", sm->pairwise);
779 0 : return;
780 : }
781 :
782 : /* FIX: add STA entry to kernel/driver here? The set_key will fail
783 : * most likely without this.. At the moment, STA entry is added only
784 : * after association has been completed. This function will be called
785 : * again after association to get the PTK configured, but that could be
786 : * optimized by adding the STA entry earlier.
787 : */
788 884 : if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
789 442 : sm->PTK.tk, klen))
790 13 : return;
791 :
792 : /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
793 429 : sm->pairwise_set = TRUE;
794 : }
795 :
796 :
797 229 : static int wpa_ft_process_auth_req(struct wpa_state_machine *sm,
798 : const u8 *ies, size_t ies_len,
799 : u8 **resp_ies, size_t *resp_ies_len)
800 : {
801 : struct rsn_mdie *mdie;
802 : struct rsn_ftie *ftie;
803 : u8 pmk_r1[PMK_LEN], pmk_r1_name[WPA_PMK_NAME_LEN];
804 : u8 ptk_name[WPA_PMK_NAME_LEN];
805 : struct wpa_auth_config *conf;
806 : struct wpa_ft_ies parse;
807 : size_t buflen;
808 : int ret;
809 : u8 *pos, *end;
810 : int pairwise;
811 :
812 229 : *resp_ies = NULL;
813 229 : *resp_ies_len = 0;
814 :
815 229 : sm->pmk_r1_name_valid = 0;
816 229 : conf = &sm->wpa_auth->conf;
817 :
818 229 : wpa_hexdump(MSG_DEBUG, "FT: Received authentication frame IEs",
819 : ies, ies_len);
820 :
821 229 : if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) {
822 0 : wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs");
823 0 : return WLAN_STATUS_UNSPECIFIED_FAILURE;
824 : }
825 :
826 229 : mdie = (struct rsn_mdie *) parse.mdie;
827 458 : if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
828 229 : os_memcmp(mdie->mobility_domain,
829 : sm->wpa_auth->conf.mobility_domain,
830 : MOBILITY_DOMAIN_ID_LEN) != 0) {
831 0 : wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
832 0 : return WLAN_STATUS_INVALID_MDIE;
833 : }
834 :
835 229 : ftie = (struct rsn_ftie *) parse.ftie;
836 229 : if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
837 0 : wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
838 0 : return WLAN_STATUS_INVALID_FTIE;
839 : }
840 :
841 229 : os_memcpy(sm->SNonce, ftie->snonce, WPA_NONCE_LEN);
842 :
843 229 : if (parse.r0kh_id == NULL) {
844 0 : wpa_printf(MSG_DEBUG, "FT: Invalid FTIE - no R0KH-ID");
845 0 : return WLAN_STATUS_INVALID_FTIE;
846 : }
847 :
848 458 : wpa_hexdump(MSG_DEBUG, "FT: STA R0KH-ID",
849 229 : parse.r0kh_id, parse.r0kh_id_len);
850 229 : os_memcpy(sm->r0kh_id, parse.r0kh_id, parse.r0kh_id_len);
851 229 : sm->r0kh_id_len = parse.r0kh_id_len;
852 :
853 229 : if (parse.rsn_pmkid == NULL) {
854 0 : wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE");
855 0 : return WLAN_STATUS_INVALID_PMKID;
856 : }
857 :
858 229 : wpa_hexdump(MSG_DEBUG, "FT: Requested PMKR0Name",
859 229 : parse.rsn_pmkid, WPA_PMK_NAME_LEN);
860 229 : wpa_derive_pmk_r1_name(parse.rsn_pmkid,
861 229 : sm->wpa_auth->conf.r1_key_holder, sm->addr,
862 : pmk_r1_name);
863 229 : wpa_hexdump(MSG_DEBUG, "FT: Derived requested PMKR1Name",
864 : pmk_r1_name, WPA_PMK_NAME_LEN);
865 :
866 229 : if (wpa_ft_fetch_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1_name, pmk_r1,
867 : &pairwise) < 0) {
868 8 : if (wpa_ft_pull_pmk_r1(sm, ies, ies_len, parse.rsn_pmkid) < 0) {
869 1 : wpa_printf(MSG_DEBUG, "FT: Did not have matching "
870 : "PMK-R1 and unknown R0KH-ID");
871 1 : return WLAN_STATUS_INVALID_PMKID;
872 : }
873 :
874 7 : return -1; /* Status pending */
875 : }
876 :
877 221 : wpa_hexdump_key(MSG_DEBUG, "FT: Selected PMK-R1", pmk_r1, PMK_LEN);
878 221 : sm->pmk_r1_name_valid = 1;
879 221 : os_memcpy(sm->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN);
880 :
881 221 : if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) {
882 0 : wpa_printf(MSG_DEBUG, "FT: Failed to get random data for "
883 : "ANonce");
884 0 : return WLAN_STATUS_UNSPECIFIED_FAILURE;
885 : }
886 :
887 221 : wpa_hexdump(MSG_DEBUG, "FT: Received SNonce",
888 221 : sm->SNonce, WPA_NONCE_LEN);
889 221 : wpa_hexdump(MSG_DEBUG, "FT: Generated ANonce",
890 221 : sm->ANonce, WPA_NONCE_LEN);
891 :
892 442 : if (wpa_pmk_r1_to_ptk(pmk_r1, sm->SNonce, sm->ANonce, sm->addr,
893 221 : sm->wpa_auth->addr, pmk_r1_name,
894 : &sm->PTK, ptk_name, sm->wpa_key_mgmt,
895 : pairwise) < 0)
896 0 : return WLAN_STATUS_UNSPECIFIED_FAILURE;
897 :
898 221 : sm->pairwise = pairwise;
899 221 : sm->PTK_valid = TRUE;
900 221 : wpa_ft_install_ptk(sm);
901 :
902 221 : buflen = 2 + sizeof(struct rsn_mdie) + 2 + sizeof(struct rsn_ftie) +
903 : 2 + FT_R1KH_ID_LEN + 200;
904 221 : *resp_ies = os_zalloc(buflen);
905 221 : if (*resp_ies == NULL) {
906 0 : return WLAN_STATUS_UNSPECIFIED_FAILURE;
907 : }
908 :
909 221 : pos = *resp_ies;
910 221 : end = *resp_ies + buflen;
911 :
912 221 : ret = wpa_write_rsn_ie(conf, pos, end - pos, parse.rsn_pmkid);
913 221 : if (ret < 0) {
914 0 : os_free(*resp_ies);
915 0 : *resp_ies = NULL;
916 0 : return WLAN_STATUS_UNSPECIFIED_FAILURE;
917 : }
918 221 : pos += ret;
919 :
920 221 : ret = wpa_write_mdie(conf, pos, end - pos);
921 221 : if (ret < 0) {
922 0 : os_free(*resp_ies);
923 0 : *resp_ies = NULL;
924 0 : return WLAN_STATUS_UNSPECIFIED_FAILURE;
925 : }
926 221 : pos += ret;
927 :
928 442 : ret = wpa_write_ftie(conf, parse.r0kh_id, parse.r0kh_id_len,
929 442 : sm->ANonce, sm->SNonce, pos, end - pos, NULL, 0);
930 221 : if (ret < 0) {
931 0 : os_free(*resp_ies);
932 0 : *resp_ies = NULL;
933 0 : return WLAN_STATUS_UNSPECIFIED_FAILURE;
934 : }
935 221 : pos += ret;
936 :
937 221 : *resp_ies_len = pos - *resp_ies;
938 :
939 221 : return WLAN_STATUS_SUCCESS;
940 : }
941 :
942 :
943 113 : void wpa_ft_process_auth(struct wpa_state_machine *sm, const u8 *bssid,
944 : u16 auth_transaction, const u8 *ies, size_t ies_len,
945 : void (*cb)(void *ctx, const u8 *dst, const u8 *bssid,
946 : u16 auth_transaction, u16 status,
947 : const u8 *ies, size_t ies_len),
948 : void *ctx)
949 : {
950 : u16 status;
951 : u8 *resp_ies;
952 : size_t resp_ies_len;
953 : int res;
954 :
955 113 : if (sm == NULL) {
956 0 : wpa_printf(MSG_DEBUG, "FT: Received authentication frame, but "
957 : "WPA SM not available");
958 0 : return;
959 : }
960 :
961 1469 : wpa_printf(MSG_DEBUG, "FT: Received authentication frame: STA=" MACSTR
962 : " BSSID=" MACSTR " transaction=%d",
963 1356 : MAC2STR(sm->addr), MAC2STR(bssid), auth_transaction);
964 113 : sm->ft_pending_cb = cb;
965 113 : sm->ft_pending_cb_ctx = ctx;
966 113 : sm->ft_pending_auth_transaction = auth_transaction;
967 113 : res = wpa_ft_process_auth_req(sm, ies, ies_len, &resp_ies,
968 : &resp_ies_len);
969 113 : if (res < 0) {
970 2 : wpa_printf(MSG_DEBUG, "FT: Callback postponed until response is available");
971 2 : return;
972 : }
973 111 : status = res;
974 :
975 777 : wpa_printf(MSG_DEBUG, "FT: FT authentication response: dst=" MACSTR
976 : " auth_transaction=%d status=%d",
977 666 : MAC2STR(sm->addr), auth_transaction + 1, status);
978 111 : wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len);
979 111 : cb(ctx, sm->addr, bssid, auth_transaction + 1, status,
980 : resp_ies, resp_ies_len);
981 111 : os_free(resp_ies);
982 : }
983 :
984 :
985 221 : u16 wpa_ft_validate_reassoc(struct wpa_state_machine *sm, const u8 *ies,
986 : size_t ies_len)
987 : {
988 : struct wpa_ft_ies parse;
989 : struct rsn_mdie *mdie;
990 : struct rsn_ftie *ftie;
991 : u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN];
992 221 : size_t mic_len = 16;
993 : unsigned int count;
994 :
995 221 : if (sm == NULL)
996 0 : return WLAN_STATUS_UNSPECIFIED_FAILURE;
997 :
998 221 : wpa_hexdump(MSG_DEBUG, "FT: Reassoc Req IEs", ies, ies_len);
999 :
1000 221 : if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) {
1001 0 : wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs");
1002 0 : return WLAN_STATUS_UNSPECIFIED_FAILURE;
1003 : }
1004 :
1005 221 : if (parse.rsn == NULL) {
1006 0 : wpa_printf(MSG_DEBUG, "FT: No RSNIE in Reassoc Req");
1007 0 : return WLAN_STATUS_UNSPECIFIED_FAILURE;
1008 : }
1009 :
1010 221 : if (parse.rsn_pmkid == NULL) {
1011 0 : wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE");
1012 0 : return WLAN_STATUS_INVALID_PMKID;
1013 : }
1014 :
1015 221 : if (os_memcmp_const(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN)
1016 : != 0) {
1017 0 : wpa_printf(MSG_DEBUG, "FT: PMKID in Reassoc Req did not match "
1018 : "with the PMKR1Name derived from auth request");
1019 0 : return WLAN_STATUS_INVALID_PMKID;
1020 : }
1021 :
1022 221 : mdie = (struct rsn_mdie *) parse.mdie;
1023 442 : if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
1024 221 : os_memcmp(mdie->mobility_domain,
1025 : sm->wpa_auth->conf.mobility_domain,
1026 : MOBILITY_DOMAIN_ID_LEN) != 0) {
1027 0 : wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
1028 0 : return WLAN_STATUS_INVALID_MDIE;
1029 : }
1030 :
1031 221 : ftie = (struct rsn_ftie *) parse.ftie;
1032 221 : if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
1033 0 : wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
1034 0 : return WLAN_STATUS_INVALID_FTIE;
1035 : }
1036 :
1037 221 : if (os_memcmp(ftie->snonce, sm->SNonce, WPA_NONCE_LEN) != 0) {
1038 0 : wpa_printf(MSG_DEBUG, "FT: SNonce mismatch in FTIE");
1039 0 : wpa_hexdump(MSG_DEBUG, "FT: Received SNonce",
1040 0 : ftie->snonce, WPA_NONCE_LEN);
1041 0 : wpa_hexdump(MSG_DEBUG, "FT: Expected SNonce",
1042 0 : sm->SNonce, WPA_NONCE_LEN);
1043 0 : return -1;
1044 : }
1045 :
1046 221 : if (os_memcmp(ftie->anonce, sm->ANonce, WPA_NONCE_LEN) != 0) {
1047 0 : wpa_printf(MSG_DEBUG, "FT: ANonce mismatch in FTIE");
1048 0 : wpa_hexdump(MSG_DEBUG, "FT: Received ANonce",
1049 0 : ftie->anonce, WPA_NONCE_LEN);
1050 0 : wpa_hexdump(MSG_DEBUG, "FT: Expected ANonce",
1051 0 : sm->ANonce, WPA_NONCE_LEN);
1052 0 : return -1;
1053 : }
1054 :
1055 :
1056 221 : if (parse.r0kh_id == NULL) {
1057 0 : wpa_printf(MSG_DEBUG, "FT: No R0KH-ID subelem in FTIE");
1058 0 : return -1;
1059 : }
1060 :
1061 442 : if (parse.r0kh_id_len != sm->r0kh_id_len ||
1062 221 : os_memcmp_const(parse.r0kh_id, sm->r0kh_id, parse.r0kh_id_len) != 0)
1063 : {
1064 0 : wpa_printf(MSG_DEBUG, "FT: R0KH-ID in FTIE did not match with "
1065 : "the current R0KH-ID");
1066 0 : wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID in FTIE",
1067 0 : parse.r0kh_id, parse.r0kh_id_len);
1068 0 : wpa_hexdump(MSG_DEBUG, "FT: The current R0KH-ID",
1069 0 : sm->r0kh_id, sm->r0kh_id_len);
1070 0 : return -1;
1071 : }
1072 :
1073 221 : if (parse.r1kh_id == NULL) {
1074 0 : wpa_printf(MSG_DEBUG, "FT: No R1KH-ID subelem in FTIE");
1075 0 : return -1;
1076 : }
1077 :
1078 221 : if (os_memcmp_const(parse.r1kh_id, sm->wpa_auth->conf.r1_key_holder,
1079 : FT_R1KH_ID_LEN) != 0) {
1080 0 : wpa_printf(MSG_DEBUG, "FT: Unknown R1KH-ID used in "
1081 : "ReassocReq");
1082 0 : wpa_hexdump(MSG_DEBUG, "FT: R1KH-ID in FTIE",
1083 0 : parse.r1kh_id, FT_R1KH_ID_LEN);
1084 0 : wpa_hexdump(MSG_DEBUG, "FT: Expected R1KH-ID",
1085 0 : sm->wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN);
1086 0 : return -1;
1087 : }
1088 :
1089 442 : if (parse.rsn_pmkid == NULL ||
1090 221 : os_memcmp_const(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN))
1091 : {
1092 0 : wpa_printf(MSG_DEBUG, "FT: No matching PMKR1Name (PMKID) in "
1093 0 : "RSNIE (pmkid=%d)", !!parse.rsn_pmkid);
1094 0 : return -1;
1095 : }
1096 :
1097 221 : count = 3;
1098 221 : if (parse.ric)
1099 0 : count += ieee802_11_ie_count(parse.ric, parse.ric_len);
1100 221 : if (ftie->mic_control[1] != count) {
1101 0 : wpa_printf(MSG_DEBUG, "FT: Unexpected IE count in MIC "
1102 : "Control: received %u expected %u",
1103 0 : ftie->mic_control[1], count);
1104 0 : return -1;
1105 : }
1106 :
1107 1768 : if (wpa_ft_mic(sm->PTK.kck, sm->PTK.kck_len, sm->addr,
1108 221 : sm->wpa_auth->addr, 5,
1109 442 : parse.mdie - 2, parse.mdie_len + 2,
1110 442 : parse.ftie - 2, parse.ftie_len + 2,
1111 442 : parse.rsn - 2, parse.rsn_len + 2,
1112 : parse.ric, parse.ric_len,
1113 : mic) < 0) {
1114 0 : wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC");
1115 0 : return WLAN_STATUS_UNSPECIFIED_FAILURE;
1116 : }
1117 :
1118 221 : if (os_memcmp_const(mic, ftie->mic, mic_len) != 0) {
1119 0 : wpa_printf(MSG_DEBUG, "FT: Invalid MIC in FTIE");
1120 0 : wpa_printf(MSG_DEBUG, "FT: addr=" MACSTR " auth_addr=" MACSTR,
1121 0 : MAC2STR(sm->addr), MAC2STR(sm->wpa_auth->addr));
1122 0 : wpa_hexdump(MSG_MSGDUMP, "FT: Received MIC",
1123 0 : ftie->mic, mic_len);
1124 0 : wpa_hexdump(MSG_MSGDUMP, "FT: Calculated MIC", mic, mic_len);
1125 0 : wpa_hexdump(MSG_MSGDUMP, "FT: MDIE",
1126 0 : parse.mdie - 2, parse.mdie_len + 2);
1127 0 : wpa_hexdump(MSG_MSGDUMP, "FT: FTIE",
1128 0 : parse.ftie - 2, parse.ftie_len + 2);
1129 0 : wpa_hexdump(MSG_MSGDUMP, "FT: RSN",
1130 0 : parse.rsn - 2, parse.rsn_len + 2);
1131 0 : return WLAN_STATUS_INVALID_FTIE;
1132 : }
1133 :
1134 221 : return WLAN_STATUS_SUCCESS;
1135 : }
1136 :
1137 :
1138 114 : int wpa_ft_action_rx(struct wpa_state_machine *sm, const u8 *data, size_t len)
1139 : {
1140 : const u8 *sta_addr, *target_ap;
1141 : const u8 *ies;
1142 : size_t ies_len;
1143 : u8 action;
1144 : struct ft_rrb_frame *frame;
1145 :
1146 114 : if (sm == NULL)
1147 0 : return -1;
1148 :
1149 : /*
1150 : * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6]
1151 : * FT Request action frame body[variable]
1152 : */
1153 :
1154 114 : if (len < 14) {
1155 0 : wpa_printf(MSG_DEBUG, "FT: Too short FT Action frame "
1156 : "(len=%lu)", (unsigned long) len);
1157 0 : return -1;
1158 : }
1159 :
1160 114 : action = data[1];
1161 114 : sta_addr = data + 2;
1162 114 : target_ap = data + 8;
1163 114 : ies = data + 14;
1164 114 : ies_len = len - 14;
1165 :
1166 1482 : wpa_printf(MSG_DEBUG, "FT: Received FT Action frame (STA=" MACSTR
1167 : " Target AP=" MACSTR " Action=%d)",
1168 1368 : MAC2STR(sta_addr), MAC2STR(target_ap), action);
1169 :
1170 114 : if (os_memcmp(sta_addr, sm->addr, ETH_ALEN) != 0) {
1171 0 : wpa_printf(MSG_DEBUG, "FT: Mismatch in FT Action STA address: "
1172 : "STA=" MACSTR " STA-Address=" MACSTR,
1173 0 : MAC2STR(sm->addr), MAC2STR(sta_addr));
1174 0 : return -1;
1175 : }
1176 :
1177 : /*
1178 : * Do some sanity checking on the target AP address (not own and not
1179 : * broadcast. This could be extended to filter based on a list of known
1180 : * APs in the MD (if such a list were configured).
1181 : */
1182 228 : if ((target_ap[0] & 0x01) ||
1183 114 : os_memcmp(target_ap, sm->wpa_auth->addr, ETH_ALEN) == 0) {
1184 0 : wpa_printf(MSG_DEBUG, "FT: Invalid Target AP in FT Action "
1185 : "frame");
1186 0 : return -1;
1187 : }
1188 :
1189 114 : wpa_hexdump(MSG_MSGDUMP, "FT: Action frame body", ies, ies_len);
1190 :
1191 : /* RRB - Forward action frame to the target AP */
1192 114 : frame = os_malloc(sizeof(*frame) + len);
1193 114 : if (frame == NULL)
1194 0 : return -1;
1195 114 : frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1196 114 : frame->packet_type = FT_PACKET_REQUEST;
1197 114 : frame->action_length = host_to_le16(len);
1198 114 : os_memcpy(frame->ap_address, sm->wpa_auth->addr, ETH_ALEN);
1199 114 : os_memcpy(frame + 1, data, len);
1200 :
1201 114 : wpa_ft_rrb_send(sm->wpa_auth, target_ap, (u8 *) frame,
1202 : sizeof(*frame) + len);
1203 114 : os_free(frame);
1204 :
1205 114 : return 0;
1206 : }
1207 :
1208 :
1209 1 : static void wpa_ft_rrb_rx_request_cb(void *ctx, const u8 *dst, const u8 *bssid,
1210 : u16 auth_transaction, u16 resp,
1211 : const u8 *ies, size_t ies_len)
1212 : {
1213 1 : struct wpa_state_machine *sm = ctx;
1214 6 : wpa_printf(MSG_DEBUG, "FT: Over-the-DS RX request cb for " MACSTR,
1215 6 : MAC2STR(sm->addr));
1216 1 : wpa_ft_send_rrb_auth_resp(sm, sm->ft_pending_current_ap, sm->addr,
1217 : WLAN_STATUS_SUCCESS, ies, ies_len);
1218 1 : }
1219 :
1220 :
1221 113 : static int wpa_ft_rrb_rx_request(struct wpa_authenticator *wpa_auth,
1222 : const u8 *current_ap, const u8 *sta_addr,
1223 : const u8 *body, size_t len)
1224 : {
1225 : struct wpa_state_machine *sm;
1226 : u16 status;
1227 : u8 *resp_ies;
1228 : size_t resp_ies_len;
1229 : int res;
1230 :
1231 113 : sm = wpa_ft_add_sta(wpa_auth, sta_addr);
1232 113 : if (sm == NULL) {
1233 0 : wpa_printf(MSG_DEBUG, "FT: Failed to add new STA based on "
1234 : "RRB Request");
1235 0 : return -1;
1236 : }
1237 :
1238 113 : wpa_hexdump(MSG_MSGDUMP, "FT: RRB Request Frame body", body, len);
1239 :
1240 113 : sm->ft_pending_cb = wpa_ft_rrb_rx_request_cb;
1241 113 : sm->ft_pending_cb_ctx = sm;
1242 113 : os_memcpy(sm->ft_pending_current_ap, current_ap, ETH_ALEN);
1243 113 : res = wpa_ft_process_auth_req(sm, body, len, &resp_ies,
1244 : &resp_ies_len);
1245 113 : if (res < 0) {
1246 5 : wpa_printf(MSG_DEBUG, "FT: No immediate response available - wait for pull response");
1247 5 : return 0;
1248 : }
1249 108 : status = res;
1250 :
1251 108 : res = wpa_ft_send_rrb_auth_resp(sm, current_ap, sta_addr, status,
1252 : resp_ies, resp_ies_len);
1253 108 : os_free(resp_ies);
1254 108 : return res;
1255 : }
1256 :
1257 :
1258 109 : static int wpa_ft_send_rrb_auth_resp(struct wpa_state_machine *sm,
1259 : const u8 *current_ap, const u8 *sta_addr,
1260 : u16 status, const u8 *resp_ies,
1261 : size_t resp_ies_len)
1262 : {
1263 109 : struct wpa_authenticator *wpa_auth = sm->wpa_auth;
1264 : size_t rlen;
1265 : struct ft_rrb_frame *frame;
1266 : u8 *pos;
1267 :
1268 1417 : wpa_printf(MSG_DEBUG, "FT: RRB authentication response: STA=" MACSTR
1269 : " CurrentAP=" MACSTR " status=%d",
1270 1308 : MAC2STR(sm->addr), MAC2STR(current_ap), status);
1271 109 : wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len);
1272 :
1273 : /* RRB - Forward action frame response to the Current AP */
1274 :
1275 : /*
1276 : * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6]
1277 : * Status_Code[2] FT Request action frame body[variable]
1278 : */
1279 109 : rlen = 2 + 2 * ETH_ALEN + 2 + resp_ies_len;
1280 :
1281 109 : frame = os_malloc(sizeof(*frame) + rlen);
1282 109 : if (frame == NULL)
1283 0 : return -1;
1284 109 : frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1285 109 : frame->packet_type = FT_PACKET_RESPONSE;
1286 109 : frame->action_length = host_to_le16(rlen);
1287 109 : os_memcpy(frame->ap_address, wpa_auth->addr, ETH_ALEN);
1288 109 : pos = (u8 *) (frame + 1);
1289 109 : *pos++ = WLAN_ACTION_FT;
1290 109 : *pos++ = 2; /* Action: Response */
1291 109 : os_memcpy(pos, sta_addr, ETH_ALEN);
1292 109 : pos += ETH_ALEN;
1293 109 : os_memcpy(pos, wpa_auth->addr, ETH_ALEN);
1294 109 : pos += ETH_ALEN;
1295 109 : WPA_PUT_LE16(pos, status);
1296 109 : pos += 2;
1297 109 : if (resp_ies)
1298 108 : os_memcpy(pos, resp_ies, resp_ies_len);
1299 :
1300 109 : wpa_ft_rrb_send(wpa_auth, current_ap, (u8 *) frame,
1301 : sizeof(*frame) + rlen);
1302 109 : os_free(frame);
1303 :
1304 109 : return 0;
1305 : }
1306 :
1307 :
1308 6 : static int wpa_ft_rrb_rx_pull(struct wpa_authenticator *wpa_auth,
1309 : const u8 *src_addr,
1310 : const u8 *data, size_t data_len)
1311 : {
1312 : struct ft_r0kh_r1kh_pull_frame f;
1313 : const u8 *crypt;
1314 : u8 *plain;
1315 : struct ft_remote_r1kh *r1kh;
1316 : struct ft_r0kh_r1kh_resp_frame resp, r;
1317 : u8 pmk_r0[PMK_LEN];
1318 : int pairwise;
1319 :
1320 6 : wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull");
1321 :
1322 6 : if (data_len < sizeof(f))
1323 0 : return -1;
1324 :
1325 6 : r1kh = wpa_auth->conf.r1kh_list;
1326 13 : while (r1kh) {
1327 6 : if (os_memcmp(r1kh->addr, src_addr, ETH_ALEN) == 0)
1328 5 : break;
1329 1 : r1kh = r1kh->next;
1330 : }
1331 6 : if (r1kh == NULL) {
1332 6 : wpa_printf(MSG_DEBUG, "FT: No matching R1KH address found for "
1333 : "PMK-R1 pull source address " MACSTR,
1334 6 : MAC2STR(src_addr));
1335 1 : return -1;
1336 : }
1337 :
1338 5 : crypt = data + offsetof(struct ft_r0kh_r1kh_pull_frame, nonce);
1339 5 : os_memset(&f, 0, sizeof(f));
1340 5 : plain = ((u8 *) &f) + offsetof(struct ft_r0kh_r1kh_pull_frame, nonce);
1341 : /* aes_unwrap() does not support inplace decryption, so use a temporary
1342 : * buffer for the data. */
1343 5 : if (aes_unwrap(r1kh->key, sizeof(r1kh->key),
1344 : (FT_R0KH_R1KH_PULL_DATA_LEN + 7) / 8,
1345 : crypt, plain) < 0) {
1346 12 : wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 pull "
1347 12 : "request from " MACSTR, MAC2STR(src_addr));
1348 2 : return -1;
1349 : }
1350 :
1351 3 : wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - nonce",
1352 : f.nonce, sizeof(f.nonce));
1353 3 : wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - PMKR0Name",
1354 : f.pmk_r0_name, WPA_PMK_NAME_LEN);
1355 36 : wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull - R1KH-ID=" MACSTR " S1KH-ID="
1356 36 : MACSTR, MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id));
1357 :
1358 3 : os_memset(&resp, 0, sizeof(resp));
1359 3 : resp.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1360 3 : resp.packet_type = FT_PACKET_R0KH_R1KH_RESP;
1361 3 : resp.data_length = host_to_le16(FT_R0KH_R1KH_RESP_DATA_LEN);
1362 3 : os_memcpy(resp.ap_address, wpa_auth->addr, ETH_ALEN);
1363 :
1364 : /* aes_wrap() does not support inplace encryption, so use a temporary
1365 : * buffer for the data. */
1366 3 : os_memcpy(r.nonce, f.nonce, sizeof(f.nonce));
1367 3 : os_memcpy(r.r1kh_id, f.r1kh_id, FT_R1KH_ID_LEN);
1368 3 : os_memcpy(r.s1kh_id, f.s1kh_id, ETH_ALEN);
1369 3 : if (wpa_ft_fetch_pmk_r0(wpa_auth, f.s1kh_id, f.pmk_r0_name, pmk_r0,
1370 : &pairwise) < 0) {
1371 0 : wpa_printf(MSG_DEBUG, "FT: No matching PMKR0Name found for "
1372 : "PMK-R1 pull");
1373 0 : return -1;
1374 : }
1375 :
1376 3 : wpa_derive_pmk_r1(pmk_r0, f.pmk_r0_name, f.r1kh_id, f.s1kh_id,
1377 : r.pmk_r1, r.pmk_r1_name);
1378 3 : wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", r.pmk_r1, PMK_LEN);
1379 3 : wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", r.pmk_r1_name,
1380 : WPA_PMK_NAME_LEN);
1381 3 : r.pairwise = host_to_le16(pairwise);
1382 3 : os_memset(r.pad, 0, sizeof(r.pad));
1383 :
1384 3 : if (aes_wrap(r1kh->key, sizeof(r1kh->key),
1385 : (FT_R0KH_R1KH_RESP_DATA_LEN + 7) / 8,
1386 : r.nonce, resp.nonce) < 0) {
1387 0 : os_memset(pmk_r0, 0, PMK_LEN);
1388 0 : return -1;
1389 : }
1390 :
1391 3 : os_memset(pmk_r0, 0, PMK_LEN);
1392 :
1393 3 : wpa_ft_rrb_send(wpa_auth, src_addr, (u8 *) &resp, sizeof(resp));
1394 :
1395 3 : return 0;
1396 : }
1397 :
1398 :
1399 3 : static void ft_pull_resp_cb_finish(void *eloop_ctx, void *timeout_ctx)
1400 : {
1401 3 : struct wpa_state_machine *sm = eloop_ctx;
1402 : int res;
1403 : u8 *resp_ies;
1404 : size_t resp_ies_len;
1405 : u16 status;
1406 :
1407 3 : res = wpa_ft_process_auth_req(sm, wpabuf_head(sm->ft_pending_req_ies),
1408 3 : wpabuf_len(sm->ft_pending_req_ies),
1409 : &resp_ies, &resp_ies_len);
1410 3 : wpabuf_free(sm->ft_pending_req_ies);
1411 3 : sm->ft_pending_req_ies = NULL;
1412 3 : if (res < 0)
1413 0 : res = WLAN_STATUS_UNSPECIFIED_FAILURE;
1414 3 : status = res;
1415 21 : wpa_printf(MSG_DEBUG, "FT: Postponed auth callback result for " MACSTR
1416 18 : " - status %u", MAC2STR(sm->addr), status);
1417 :
1418 6 : sm->ft_pending_cb(sm->ft_pending_cb_ctx, sm->addr, sm->wpa_auth->addr,
1419 3 : sm->ft_pending_auth_transaction + 1, status,
1420 : resp_ies, resp_ies_len);
1421 3 : os_free(resp_ies);
1422 3 : }
1423 :
1424 :
1425 3 : static int ft_pull_resp_cb(struct wpa_state_machine *sm, void *ctx)
1426 : {
1427 3 : struct ft_r0kh_r1kh_resp_frame *frame = ctx;
1428 :
1429 3 : if (os_memcmp(frame->s1kh_id, sm->addr, ETH_ALEN) != 0)
1430 0 : return 0;
1431 3 : if (os_memcmp(frame->nonce, sm->ft_pending_pull_nonce,
1432 : FT_R0KH_R1KH_PULL_NONCE_LEN) != 0)
1433 0 : return 0;
1434 3 : if (sm->ft_pending_cb == NULL || sm->ft_pending_req_ies == NULL)
1435 0 : return 0;
1436 :
1437 18 : wpa_printf(MSG_DEBUG, "FT: Response to a pending pull request for "
1438 18 : MACSTR " - process from timeout", MAC2STR(sm->addr));
1439 3 : eloop_register_timeout(0, 0, ft_pull_resp_cb_finish, sm, NULL);
1440 3 : return 1;
1441 : }
1442 :
1443 :
1444 3 : static int wpa_ft_rrb_rx_resp(struct wpa_authenticator *wpa_auth,
1445 : const u8 *src_addr,
1446 : const u8 *data, size_t data_len)
1447 : {
1448 : struct ft_r0kh_r1kh_resp_frame f;
1449 : const u8 *crypt;
1450 : u8 *plain;
1451 : struct ft_remote_r0kh *r0kh;
1452 : int pairwise, res;
1453 :
1454 3 : wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull response");
1455 :
1456 3 : if (data_len < sizeof(f))
1457 0 : return -1;
1458 :
1459 3 : r0kh = wpa_auth->conf.r0kh_list;
1460 9 : while (r0kh) {
1461 6 : if (os_memcmp(r0kh->addr, src_addr, ETH_ALEN) == 0)
1462 3 : break;
1463 3 : r0kh = r0kh->next;
1464 : }
1465 3 : if (r0kh == NULL) {
1466 0 : wpa_printf(MSG_DEBUG, "FT: No matching R0KH address found for "
1467 : "PMK-R0 pull response source address " MACSTR,
1468 0 : MAC2STR(src_addr));
1469 0 : return -1;
1470 : }
1471 :
1472 3 : crypt = data + offsetof(struct ft_r0kh_r1kh_resp_frame, nonce);
1473 3 : os_memset(&f, 0, sizeof(f));
1474 3 : plain = ((u8 *) &f) + offsetof(struct ft_r0kh_r1kh_resp_frame, nonce);
1475 : /* aes_unwrap() does not support inplace decryption, so use a temporary
1476 : * buffer for the data. */
1477 3 : if (aes_unwrap(r0kh->key, sizeof(r0kh->key),
1478 : (FT_R0KH_R1KH_RESP_DATA_LEN + 7) / 8,
1479 : crypt, plain) < 0) {
1480 0 : wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 pull "
1481 0 : "response from " MACSTR, MAC2STR(src_addr));
1482 0 : return -1;
1483 : }
1484 :
1485 3 : if (os_memcmp_const(f.r1kh_id, wpa_auth->conf.r1_key_holder,
1486 : FT_R1KH_ID_LEN) != 0) {
1487 0 : wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull response did not use a "
1488 : "matching R1KH-ID");
1489 0 : return -1;
1490 : }
1491 :
1492 3 : pairwise = le_to_host16(f.pairwise);
1493 3 : wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - nonce",
1494 : f.nonce, sizeof(f.nonce));
1495 36 : wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull - R1KH-ID=" MACSTR " S1KH-ID="
1496 : MACSTR " pairwise=0x%x",
1497 36 : MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id), pairwise);
1498 3 : wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1 pull - PMK-R1",
1499 : f.pmk_r1, PMK_LEN);
1500 3 : wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - PMKR1Name",
1501 : f.pmk_r1_name, WPA_PMK_NAME_LEN);
1502 :
1503 3 : res = wpa_ft_store_pmk_r1(wpa_auth, f.s1kh_id, f.pmk_r1, f.pmk_r1_name,
1504 : pairwise);
1505 3 : wpa_printf(MSG_DEBUG, "FT: Look for pending pull request");
1506 3 : wpa_auth_for_each_sta(wpa_auth, ft_pull_resp_cb, &f);
1507 3 : os_memset(f.pmk_r1, 0, PMK_LEN);
1508 :
1509 3 : return res ? 0 : -1;
1510 : }
1511 :
1512 :
1513 14 : static int wpa_ft_rrb_rx_push(struct wpa_authenticator *wpa_auth,
1514 : const u8 *src_addr,
1515 : const u8 *data, size_t data_len)
1516 : {
1517 : struct ft_r0kh_r1kh_push_frame f;
1518 : const u8 *crypt;
1519 : u8 *plain;
1520 : struct ft_remote_r0kh *r0kh;
1521 : struct os_time now;
1522 : os_time_t tsend;
1523 : int pairwise;
1524 :
1525 14 : wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 push");
1526 :
1527 14 : if (data_len < sizeof(f))
1528 0 : return -1;
1529 :
1530 14 : r0kh = wpa_auth->conf.r0kh_list;
1531 43 : while (r0kh) {
1532 28 : if (os_memcmp(r0kh->addr, src_addr, ETH_ALEN) == 0)
1533 13 : break;
1534 15 : r0kh = r0kh->next;
1535 : }
1536 14 : if (r0kh == NULL) {
1537 6 : wpa_printf(MSG_DEBUG, "FT: No matching R0KH address found for "
1538 : "PMK-R0 push source address " MACSTR,
1539 6 : MAC2STR(src_addr));
1540 1 : return -1;
1541 : }
1542 :
1543 13 : crypt = data + offsetof(struct ft_r0kh_r1kh_push_frame, timestamp);
1544 13 : os_memset(&f, 0, sizeof(f));
1545 13 : plain = ((u8 *) &f) + offsetof(struct ft_r0kh_r1kh_push_frame,
1546 : timestamp);
1547 : /* aes_unwrap() does not support inplace decryption, so use a temporary
1548 : * buffer for the data. */
1549 13 : if (aes_unwrap(r0kh->key, sizeof(r0kh->key),
1550 : (FT_R0KH_R1KH_PUSH_DATA_LEN + 7) / 8,
1551 : crypt, plain) < 0) {
1552 6 : wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 push from "
1553 6 : MACSTR, MAC2STR(src_addr));
1554 1 : return -1;
1555 : }
1556 :
1557 12 : os_get_time(&now);
1558 12 : tsend = WPA_GET_LE32(f.timestamp);
1559 24 : if ((now.sec > tsend && now.sec - tsend > 60) ||
1560 12 : (now.sec < tsend && tsend - now.sec > 60)) {
1561 0 : wpa_printf(MSG_DEBUG, "FT: PMK-R1 push did not have a valid "
1562 : "timestamp: sender time %d own time %d\n",
1563 0 : (int) tsend, (int) now.sec);
1564 0 : return -1;
1565 : }
1566 :
1567 12 : if (os_memcmp_const(f.r1kh_id, wpa_auth->conf.r1_key_holder,
1568 : FT_R1KH_ID_LEN) != 0) {
1569 0 : wpa_printf(MSG_DEBUG, "FT: PMK-R1 push did not use a matching "
1570 : "R1KH-ID (received " MACSTR " own " MACSTR ")",
1571 0 : MAC2STR(f.r1kh_id),
1572 0 : MAC2STR(wpa_auth->conf.r1_key_holder));
1573 0 : return -1;
1574 : }
1575 :
1576 12 : pairwise = le_to_host16(f.pairwise);
1577 144 : wpa_printf(MSG_DEBUG, "FT: PMK-R1 push - R1KH-ID=" MACSTR " S1KH-ID="
1578 : MACSTR " pairwise=0x%x",
1579 144 : MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id), pairwise);
1580 12 : wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1 push - PMK-R1",
1581 : f.pmk_r1, PMK_LEN);
1582 12 : wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 push - PMKR1Name",
1583 : f.pmk_r1_name, WPA_PMK_NAME_LEN);
1584 :
1585 12 : wpa_ft_store_pmk_r1(wpa_auth, f.s1kh_id, f.pmk_r1, f.pmk_r1_name,
1586 : pairwise);
1587 12 : os_memset(f.pmk_r1, 0, PMK_LEN);
1588 :
1589 12 : return 0;
1590 : }
1591 :
1592 :
1593 246 : int wpa_ft_rrb_rx(struct wpa_authenticator *wpa_auth, const u8 *src_addr,
1594 : const u8 *data, size_t data_len)
1595 : {
1596 : struct ft_rrb_frame *frame;
1597 : u16 alen;
1598 : const u8 *pos, *end, *start;
1599 : u8 action;
1600 : const u8 *sta_addr, *target_ap_addr;
1601 :
1602 1476 : wpa_printf(MSG_DEBUG, "FT: RRB received frame from remote AP " MACSTR,
1603 1476 : MAC2STR(src_addr));
1604 :
1605 246 : if (data_len < sizeof(*frame)) {
1606 0 : wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (data_len=%lu)",
1607 : (unsigned long) data_len);
1608 0 : return -1;
1609 : }
1610 :
1611 246 : pos = data;
1612 246 : frame = (struct ft_rrb_frame *) pos;
1613 246 : pos += sizeof(*frame);
1614 :
1615 246 : alen = le_to_host16(frame->action_length);
1616 1968 : wpa_printf(MSG_DEBUG, "FT: RRB frame - frame_type=%d packet_type=%d "
1617 : "action_length=%d ap_address=" MACSTR,
1618 492 : frame->frame_type, frame->packet_type, alen,
1619 1476 : MAC2STR(frame->ap_address));
1620 :
1621 246 : if (frame->frame_type != RSN_REMOTE_FRAME_TYPE_FT_RRB) {
1622 : /* Discard frame per IEEE Std 802.11r-2008, 11A.10.3 */
1623 1 : wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with "
1624 1 : "unrecognized type %d", frame->frame_type);
1625 1 : return -1;
1626 : }
1627 :
1628 245 : if (alen > data_len - sizeof(*frame)) {
1629 0 : wpa_printf(MSG_DEBUG, "FT: RRB frame too short for action "
1630 : "frame");
1631 0 : return -1;
1632 : }
1633 :
1634 245 : if (frame->packet_type == FT_PACKET_R0KH_R1KH_PULL)
1635 6 : return wpa_ft_rrb_rx_pull(wpa_auth, src_addr, data, data_len);
1636 239 : if (frame->packet_type == FT_PACKET_R0KH_R1KH_RESP)
1637 3 : return wpa_ft_rrb_rx_resp(wpa_auth, src_addr, data, data_len);
1638 236 : if (frame->packet_type == FT_PACKET_R0KH_R1KH_PUSH)
1639 14 : return wpa_ft_rrb_rx_push(wpa_auth, src_addr, data, data_len);
1640 :
1641 222 : wpa_hexdump(MSG_MSGDUMP, "FT: RRB - FT Action frame", pos, alen);
1642 :
1643 222 : if (alen < 1 + 1 + 2 * ETH_ALEN) {
1644 0 : wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (not enough "
1645 : "room for Action Frame body); alen=%lu",
1646 : (unsigned long) alen);
1647 0 : return -1;
1648 : }
1649 222 : start = pos;
1650 222 : end = pos + alen;
1651 :
1652 222 : if (*pos != WLAN_ACTION_FT) {
1653 0 : wpa_printf(MSG_DEBUG, "FT: Unexpected Action frame category "
1654 0 : "%d", *pos);
1655 0 : return -1;
1656 : }
1657 :
1658 222 : pos++;
1659 222 : action = *pos++;
1660 222 : sta_addr = pos;
1661 222 : pos += ETH_ALEN;
1662 222 : target_ap_addr = pos;
1663 222 : pos += ETH_ALEN;
1664 2664 : wpa_printf(MSG_DEBUG, "FT: RRB Action Frame: action=%d sta_addr="
1665 : MACSTR " target_ap_addr=" MACSTR,
1666 2664 : action, MAC2STR(sta_addr), MAC2STR(target_ap_addr));
1667 :
1668 222 : if (frame->packet_type == FT_PACKET_REQUEST) {
1669 113 : wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Request");
1670 :
1671 113 : if (action != 1) {
1672 0 : wpa_printf(MSG_DEBUG, "FT: Unexpected Action %d in "
1673 : "RRB Request", action);
1674 0 : return -1;
1675 : }
1676 :
1677 113 : if (os_memcmp(target_ap_addr, wpa_auth->addr, ETH_ALEN) != 0) {
1678 0 : wpa_printf(MSG_DEBUG, "FT: Target AP address in the "
1679 : "RRB Request does not match with own "
1680 : "address");
1681 0 : return -1;
1682 : }
1683 :
1684 113 : if (wpa_ft_rrb_rx_request(wpa_auth, frame->ap_address,
1685 113 : sta_addr, pos, end - pos) < 0)
1686 0 : return -1;
1687 109 : } else if (frame->packet_type == FT_PACKET_RESPONSE) {
1688 : u16 status_code;
1689 :
1690 109 : if (end - pos < 2) {
1691 0 : wpa_printf(MSG_DEBUG, "FT: Not enough room for status "
1692 : "code in RRB Response");
1693 0 : return -1;
1694 : }
1695 109 : status_code = WPA_GET_LE16(pos);
1696 109 : pos += 2;
1697 :
1698 109 : wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Response "
1699 : "(status_code=%d)", status_code);
1700 :
1701 109 : if (wpa_ft_action_send(wpa_auth, sta_addr, start, alen) < 0)
1702 0 : return -1;
1703 : } else {
1704 0 : wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with unknown "
1705 0 : "packet_type %d", frame->packet_type);
1706 0 : return -1;
1707 : }
1708 :
1709 222 : if (end > pos) {
1710 221 : wpa_hexdump(MSG_DEBUG, "FT: Ignore extra data in end",
1711 221 : pos, end - pos);
1712 : }
1713 :
1714 222 : return 0;
1715 : }
1716 :
1717 :
1718 16 : static void wpa_ft_generate_pmk_r1(struct wpa_authenticator *wpa_auth,
1719 : struct wpa_ft_pmk_r0_sa *pmk_r0,
1720 : struct ft_remote_r1kh *r1kh,
1721 : const u8 *s1kh_id, int pairwise)
1722 : {
1723 : struct ft_r0kh_r1kh_push_frame frame, f;
1724 : struct os_time now;
1725 : const u8 *plain;
1726 : u8 *crypt;
1727 :
1728 16 : os_memset(&frame, 0, sizeof(frame));
1729 16 : frame.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1730 16 : frame.packet_type = FT_PACKET_R0KH_R1KH_PUSH;
1731 16 : frame.data_length = host_to_le16(FT_R0KH_R1KH_PUSH_DATA_LEN);
1732 16 : os_memcpy(frame.ap_address, wpa_auth->addr, ETH_ALEN);
1733 :
1734 : /* aes_wrap() does not support inplace encryption, so use a temporary
1735 : * buffer for the data. */
1736 16 : os_memcpy(f.r1kh_id, r1kh->id, FT_R1KH_ID_LEN);
1737 16 : os_memcpy(f.s1kh_id, s1kh_id, ETH_ALEN);
1738 16 : os_memcpy(f.pmk_r0_name, pmk_r0->pmk_r0_name, WPA_PMK_NAME_LEN);
1739 16 : wpa_derive_pmk_r1(pmk_r0->pmk_r0, pmk_r0->pmk_r0_name, r1kh->id,
1740 : s1kh_id, f.pmk_r1, f.pmk_r1_name);
1741 16 : wpa_printf(MSG_DEBUG, "FT: R1KH-ID " MACSTR, MAC2STR(r1kh->id));
1742 16 : wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", f.pmk_r1, PMK_LEN);
1743 16 : wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", f.pmk_r1_name,
1744 : WPA_PMK_NAME_LEN);
1745 16 : os_get_time(&now);
1746 16 : WPA_PUT_LE32(f.timestamp, now.sec);
1747 16 : f.pairwise = host_to_le16(pairwise);
1748 16 : os_memset(f.pad, 0, sizeof(f.pad));
1749 16 : plain = ((const u8 *) &f) + offsetof(struct ft_r0kh_r1kh_push_frame,
1750 : timestamp);
1751 16 : crypt = ((u8 *) &frame) + offsetof(struct ft_r0kh_r1kh_push_frame,
1752 : timestamp);
1753 16 : if (aes_wrap(r1kh->key, sizeof(r1kh->key),
1754 : (FT_R0KH_R1KH_PUSH_DATA_LEN + 7) / 8,
1755 : plain, crypt) < 0)
1756 16 : return;
1757 :
1758 16 : wpa_ft_rrb_send(wpa_auth, r1kh->addr, (u8 *) &frame, sizeof(frame));
1759 : }
1760 :
1761 :
1762 1346 : void wpa_ft_push_pmk_r1(struct wpa_authenticator *wpa_auth, const u8 *addr)
1763 : {
1764 : struct wpa_ft_pmk_r0_sa *r0;
1765 : struct ft_remote_r1kh *r1kh;
1766 :
1767 1346 : if (!wpa_auth->conf.pmk_r1_push)
1768 1330 : return;
1769 :
1770 16 : r0 = wpa_auth->ft_pmk_cache->pmk_r0;
1771 32 : while (r0) {
1772 16 : if (os_memcmp(r0->spa, addr, ETH_ALEN) == 0)
1773 16 : break;
1774 0 : r0 = r0->next;
1775 : }
1776 :
1777 16 : if (r0 == NULL || r0->pmk_r1_pushed)
1778 0 : return;
1779 16 : r0->pmk_r1_pushed = 1;
1780 :
1781 96 : wpa_printf(MSG_DEBUG, "FT: Deriving and pushing PMK-R1 keys to R1KHs "
1782 96 : "for STA " MACSTR, MAC2STR(addr));
1783 :
1784 16 : r1kh = wpa_auth->conf.r1kh_list;
1785 48 : while (r1kh) {
1786 16 : wpa_ft_generate_pmk_r1(wpa_auth, r0, r1kh, addr, r0->pairwise);
1787 16 : r1kh = r1kh->next;
1788 : }
1789 : }
1790 :
1791 : #endif /* CONFIG_IEEE80211R */
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