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WPS: Limit WPS ER event_id < 2^31 bits to avoid issues with atoi()
[thirdparty/hostap.git] / src / ap / wpa_auth_ft.c
CommitLineData
6fc6879b
JM		 1/*
2 * hostapd - IEEE 802.11r - Fast BSS Transition
6226e38d 3 * Copyright (c) 2004-2009, Jouni Malinen <j@w1.fi>
6fc6879b
JM		 4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * Alternatively, this software may be distributed under the terms of BSD
10 * license.
11 *
12 * See README and COPYING for more details.
13 */
14
6226e38d 15#include "utils/includes.h"
6fc6879b 16
6226e38d 17#include "utils/common.h"
81f4f619
JM		 18#include "common/ieee802_11_defs.h"
19#include "common/ieee802_11_common.h"
03da66bd 20#include "crypto/aes_wrap.h"
6226e38d 21#include "ap_config.h"
6fc6879b 22#include "ieee802_11.h"
1057d78e 23#include "wmm.h"
6226e38d 24#include "wpa_auth.h"
6fc6879b
JM		 25#include "wpa_auth_i.h"
26#include "wpa_auth_ie.h"
27
28
29#ifdef CONFIG_IEEE80211R
30
f238cf9f
JM		 31struct wpa_ft_ies {
32 const u8 *mdie;
33 size_t mdie_len;
34 const u8 *ftie;
35 size_t ftie_len;
36 const u8 *r1kh_id;
37 const u8 *gtk;
38 size_t gtk_len;
39 const u8 *r0kh_id;
40 size_t r0kh_id_len;
41 const u8 *rsn;
42 size_t rsn_len;
43 const u8 *rsn_pmkid;
44 const u8 *ric;
45 size_t ric_len;
46};
47
48
49static int wpa_ft_parse_ies(const u8 *ies, size_t ies_len,
50 struct wpa_ft_ies *parse);
51
52
6fc6879b
JM		 53static int wpa_ft_rrb_send(struct wpa_authenticator *wpa_auth, const u8 *dst,
54 const u8 *data, size_t data_len)
55{
56 if (wpa_auth->cb.send_ether == NULL)
57 return -1;
58 return wpa_auth->cb.send_ether(wpa_auth->cb.ctx, dst, ETH_P_RRB,
59 data, data_len);
60}
61
62
63static int wpa_ft_action_send(struct wpa_authenticator *wpa_auth,
64 const u8 *dst, const u8 *data, size_t data_len)
65{
66 if (wpa_auth->cb.send_ft_action == NULL)
67 return -1;
68 return wpa_auth->cb.send_ft_action(wpa_auth->cb.ctx, dst,
69 data, data_len);
70}
71
72
73static struct wpa_state_machine *
74wpa_ft_add_sta(struct wpa_authenticator *wpa_auth, const u8 *sta_addr)
75{
76 if (wpa_auth->cb.add_sta == NULL)
77 return NULL;
78 return wpa_auth->cb.add_sta(wpa_auth->cb.ctx, sta_addr);
79}
80
81
82int wpa_write_mdie(struct wpa_auth_config *conf, u8 *buf, size_t len)
83{
84 u8 *pos = buf;
85 u8 capab;
86 if (len < 2 + sizeof(struct rsn_mdie))
87 return -1;
88
89 *pos++ = WLAN_EID_MOBILITY_DOMAIN;
90 *pos++ = MOBILITY_DOMAIN_ID_LEN + 1;
91 os_memcpy(pos, conf->mobility_domain, MOBILITY_DOMAIN_ID_LEN);
92 pos += MOBILITY_DOMAIN_ID_LEN;
93 capab = RSN_FT_CAPAB_FT_OVER_DS;
94 *pos++ = capab;
95
96 return pos - buf;
97}
98
99
86dfabb8
JM		 100int wpa_write_ftie(struct wpa_auth_config *conf, const u8 *r0kh_id,
101 size_t r0kh_id_len,
102 const u8 *anonce, const u8 *snonce,
103 u8 *buf, size_t len, const u8 *subelem,
104 size_t subelem_len)
6fc6879b
JM		 105{
106 u8 *pos = buf, *ielen;
107 struct rsn_ftie *hdr;
108
109 if (len < 2 + sizeof(*hdr) + 2 + FT_R1KH_ID_LEN + 2 + r0kh_id_len +
110 subelem_len)
111 return -1;
112
113 *pos++ = WLAN_EID_FAST_BSS_TRANSITION;
114 ielen = pos++;
115
116 hdr = (struct rsn_ftie *) pos;
117 os_memset(hdr, 0, sizeof(*hdr));
118 pos += sizeof(*hdr);
119 WPA_PUT_LE16(hdr->mic_control, 0);
120 if (anonce)
121 os_memcpy(hdr->anonce, anonce, WPA_NONCE_LEN);
122 if (snonce)
123 os_memcpy(hdr->snonce, snonce, WPA_NONCE_LEN);
124
125 /* Optional Parameters */
126 *pos++ = FTIE_SUBELEM_R1KH_ID;
127 *pos++ = FT_R1KH_ID_LEN;
128 os_memcpy(pos, conf->r1_key_holder, FT_R1KH_ID_LEN);
129 pos += FT_R1KH_ID_LEN;
130
131 if (r0kh_id) {
132 *pos++ = FTIE_SUBELEM_R0KH_ID;
133 *pos++ = r0kh_id_len;
134 os_memcpy(pos, r0kh_id, r0kh_id_len);
135 pos += r0kh_id_len;
136 }
137
138 if (subelem) {
139 os_memcpy(pos, subelem, subelem_len);
140 pos += subelem_len;
141 }
142
143 *ielen = pos - buf - 2;
144
145 return pos - buf;
146}
147
148
149struct wpa_ft_pmk_r0_sa {
150 struct wpa_ft_pmk_r0_sa *next;
151 u8 pmk_r0[PMK_LEN];
152 u8 pmk_r0_name[WPA_PMK_NAME_LEN];
153 u8 spa[ETH_ALEN];
1b484d60 154 int pairwise; /* Pairwise cipher suite, WPA_CIPHER_* */
6fc6879b
JM		 155 /* TODO: expiration, identity, radius_class, EAP type, VLAN ID */
156 int pmk_r1_pushed;
157};
158
159struct wpa_ft_pmk_r1_sa {
160 struct wpa_ft_pmk_r1_sa *next;
161 u8 pmk_r1[PMK_LEN];
162 u8 pmk_r1_name[WPA_PMK_NAME_LEN];
163 u8 spa[ETH_ALEN];
1b484d60 164 int pairwise; /* Pairwise cipher suite, WPA_CIPHER_* */
6fc6879b
JM		 165 /* TODO: expiration, identity, radius_class, EAP type, VLAN ID */
166};
167
168struct wpa_ft_pmk_cache {
169 struct wpa_ft_pmk_r0_sa *pmk_r0;
170 struct wpa_ft_pmk_r1_sa *pmk_r1;
171};
172
173struct wpa_ft_pmk_cache * wpa_ft_pmk_cache_init(void)
174{
175 struct wpa_ft_pmk_cache *cache;
176
177 cache = os_zalloc(sizeof(*cache));
178
179 return cache;
180}
181
182
183void wpa_ft_pmk_cache_deinit(struct wpa_ft_pmk_cache *cache)
184{
185 struct wpa_ft_pmk_r0_sa *r0, *r0prev;
186 struct wpa_ft_pmk_r1_sa *r1, *r1prev;
187
188 r0 = cache->pmk_r0;
189 while (r0) {
190 r0prev = r0;
191 r0 = r0->next;
192 os_memset(r0prev->pmk_r0, 0, PMK_LEN);
193 os_free(r0prev);
194 }
195
196 r1 = cache->pmk_r1;
197 while (r1) {
198 r1prev = r1;
199 r1 = r1->next;
200 os_memset(r1prev->pmk_r1, 0, PMK_LEN);
201 os_free(r1prev);
202 }
203
204 os_free(cache);
205}
206
207
208static int wpa_ft_store_pmk_r0(struct wpa_authenticator *wpa_auth,
209 const u8 *spa, const u8 *pmk_r0,
1b484d60 210 const u8 *pmk_r0_name, int pairwise)
6fc6879b
JM		 211{
212 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
213 struct wpa_ft_pmk_r0_sa *r0;
214
215 /* TODO: add expiration and limit on number of entries in cache */
216
217 r0 = os_zalloc(sizeof(*r0));
218 if (r0 == NULL)
219 return -1;
220
221 os_memcpy(r0->pmk_r0, pmk_r0, PMK_LEN);
222 os_memcpy(r0->pmk_r0_name, pmk_r0_name, WPA_PMK_NAME_LEN);
223 os_memcpy(r0->spa, spa, ETH_ALEN);
1b484d60 224 r0->pairwise = pairwise;
6fc6879b
JM		 225
226 r0->next = cache->pmk_r0;
227 cache->pmk_r0 = r0;
228
229 return 0;
230}
231
232
233static int wpa_ft_fetch_pmk_r0(struct wpa_authenticator *wpa_auth,
234 const u8 *spa, const u8 *pmk_r0_name,
1b484d60 235 u8 *pmk_r0, int *pairwise)
6fc6879b
JM		 236{
237 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
238 struct wpa_ft_pmk_r0_sa *r0;
239
240 r0 = cache->pmk_r0;
241 while (r0) {
242 if (os_memcmp(r0->spa, spa, ETH_ALEN) == 0 &&
243 os_memcmp(r0->pmk_r0_name, pmk_r0_name, WPA_PMK_NAME_LEN)
244 == 0) {
245 os_memcpy(pmk_r0, r0->pmk_r0, PMK_LEN);
1b484d60
JM		 246 if (pairwise)
247 *pairwise = r0->pairwise;
6fc6879b
JM		 248 return 0;
249 }
250
251 r0 = r0->next;
252 }
253
254 return -1;
255}
256
257
258static int wpa_ft_store_pmk_r1(struct wpa_authenticator *wpa_auth,
259 const u8 *spa, const u8 *pmk_r1,
1b484d60 260 const u8 *pmk_r1_name, int pairwise)
6fc6879b
JM		 261{
262 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
263 struct wpa_ft_pmk_r1_sa *r1;
264
265 /* TODO: add expiration and limit on number of entries in cache */
266
267 r1 = os_zalloc(sizeof(*r1));
268 if (r1 == NULL)
269 return -1;
270
271 os_memcpy(r1->pmk_r1, pmk_r1, PMK_LEN);
272 os_memcpy(r1->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN);
273 os_memcpy(r1->spa, spa, ETH_ALEN);
1b484d60 274 r1->pairwise = pairwise;
6fc6879b
JM		 275
276 r1->next = cache->pmk_r1;
277 cache->pmk_r1 = r1;
278
279 return 0;
280}
281
282
283static int wpa_ft_fetch_pmk_r1(struct wpa_authenticator *wpa_auth,
284 const u8 *spa, const u8 *pmk_r1_name,
1b484d60 285 u8 *pmk_r1, int *pairwise)
6fc6879b
JM		 286{
287 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
288 struct wpa_ft_pmk_r1_sa *r1;
289
290 r1 = cache->pmk_r1;
291 while (r1) {
292 if (os_memcmp(r1->spa, spa, ETH_ALEN) == 0 &&
293 os_memcmp(r1->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN)
294 == 0) {
295 os_memcpy(pmk_r1, r1->pmk_r1, PMK_LEN);
1b484d60
JM		 296 if (pairwise)
297 *pairwise = r1->pairwise;
6fc6879b
JM		 298 return 0;
299 }
300
301 r1 = r1->next;
302 }
303
304 return -1;
305}
306
307
308static int wpa_ft_pull_pmk_r1(struct wpa_authenticator *wpa_auth,
309 const u8 *s1kh_id, const u8 *r0kh_id,
310 size_t r0kh_id_len, const u8 *pmk_r0_name)
311{
312 struct ft_remote_r0kh *r0kh;
313 struct ft_r0kh_r1kh_pull_frame frame, f;
314
315 r0kh = wpa_auth->conf.r0kh_list;
316 while (r0kh) {
317 if (r0kh->id_len == r0kh_id_len &&
318 os_memcmp(r0kh->id, r0kh_id, r0kh_id_len) == 0)
319 break;
320 r0kh = r0kh->next;
321 }
322 if (r0kh == NULL)
323 return -1;
324
325 wpa_printf(MSG_DEBUG, "FT: Send PMK-R1 pull request to remote R0KH "
326 "address " MACSTR, MAC2STR(r0kh->addr));
327
328 os_memset(&frame, 0, sizeof(frame));
329 frame.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
330 frame.packet_type = FT_PACKET_R0KH_R1KH_PULL;
331 frame.data_length = host_to_le16(FT_R0KH_R1KH_PULL_DATA_LEN);
332 os_memcpy(frame.ap_address, wpa_auth->addr, ETH_ALEN);
333
334 /* aes_wrap() does not support inplace encryption, so use a temporary
335 * buffer for the data. */
336 if (os_get_random(f.nonce, sizeof(f.nonce))) {
337 wpa_printf(MSG_DEBUG, "FT: Failed to get random data for "
338 "nonce");
339 return -1;
340 }
341 os_memcpy(f.pmk_r0_name, pmk_r0_name, WPA_PMK_NAME_LEN);
342 os_memcpy(f.r1kh_id, wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN);
343 os_memcpy(f.s1kh_id, s1kh_id, ETH_ALEN);
344
345 if (aes_wrap(r0kh->key, (FT_R0KH_R1KH_PULL_DATA_LEN + 7) / 8,
346 f.nonce, frame.nonce) < 0)
347 return -1;
348
349 wpa_ft_rrb_send(wpa_auth, r0kh->addr, (u8 *) &frame, sizeof(frame));
350
351 return 0;
352}
353
354
355int wpa_auth_derive_ptk_ft(struct wpa_state_machine *sm, const u8 *pmk,
c0a61908 356 struct wpa_ptk *ptk, size_t ptk_len)
6fc6879b
JM		 357{
358 u8 pmk_r0[PMK_LEN], pmk_r0_name[WPA_PMK_NAME_LEN];
26e23750 359 u8 pmk_r1[PMK_LEN];
6fc6879b
JM		 360 u8 ptk_name[WPA_PMK_NAME_LEN];
361 const u8 *mdid = sm->wpa_auth->conf.mobility_domain;
362 const u8 *r0kh = sm->wpa_auth->conf.r0_key_holder;
363 size_t r0kh_len = sm->wpa_auth->conf.r0_key_holder_len;
364 const u8 *r1kh = sm->wpa_auth->conf.r1_key_holder;
365 const u8 *ssid = sm->wpa_auth->conf.ssid;
366 size_t ssid_len = sm->wpa_auth->conf.ssid_len;
367
368
369 if (sm->xxkey_len == 0) {
370 wpa_printf(MSG_DEBUG, "FT: XXKey not available for key "
371 "derivation");
372 return -1;
373 }
374
375 wpa_derive_pmk_r0(sm->xxkey, sm->xxkey_len, ssid, ssid_len, mdid,
376 r0kh, r0kh_len, sm->addr, pmk_r0, pmk_r0_name);
377 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R0", pmk_r0, PMK_LEN);
378 wpa_hexdump(MSG_DEBUG, "FT: PMKR0Name", pmk_r0_name, WPA_PMK_NAME_LEN);
1b484d60
JM		 379 wpa_ft_store_pmk_r0(sm->wpa_auth, sm->addr, pmk_r0, pmk_r0_name,
380 sm->pairwise);
6fc6879b
JM		 381
382 wpa_derive_pmk_r1(pmk_r0, pmk_r0_name, r1kh, sm->addr,
26e23750 383 pmk_r1, sm->pmk_r1_name);
6fc6879b 384 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", pmk_r1, PMK_LEN);
26e23750
JM		 385 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", sm->pmk_r1_name,
386 WPA_PMK_NAME_LEN);
387 wpa_ft_store_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1, sm->pmk_r1_name,
1b484d60 388 sm->pairwise);
6fc6879b
JM		 389
390 wpa_pmk_r1_to_ptk(pmk_r1, sm->SNonce, sm->ANonce, sm->addr,
26e23750 391 sm->wpa_auth->addr, sm->pmk_r1_name,
c0a61908
JM		 392 (u8 *) ptk, ptk_len, ptk_name);
393 wpa_hexdump_key(MSG_DEBUG, "FT: PTK", (u8 *) ptk, ptk_len);
6fc6879b
JM		 394 wpa_hexdump(MSG_DEBUG, "FT: PTKName", ptk_name, WPA_PMK_NAME_LEN);
395
396 return 0;
397}
398
399
400static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
401 const u8 *addr, int idx, u8 *seq)
402{
403 if (wpa_auth->cb.get_seqnum == NULL)
404 return -1;
405 return wpa_auth->cb.get_seqnum(wpa_auth->cb.ctx, addr, idx, seq);
406}
407
408
409static u8 * wpa_ft_gtk_subelem(struct wpa_state_machine *sm, size_t *len)
410{
411 u8 *subelem;
412 struct wpa_group *gsm = sm->group;
413 size_t subelem_len, pad_len;
414 const u8 *key;
415 size_t key_len;
416 u8 keybuf[32];
417
418 key_len = gsm->GTK_len;
419 if (key_len > sizeof(keybuf))
420 return NULL;
421
422 /*
423 * Pad key for AES Key Wrap if it is not multiple of 8 bytes or is less
424 * than 16 bytes.
425 */
426 pad_len = key_len % 8;
427 if (pad_len)
428 pad_len = 8 - pad_len;
429 if (key_len + pad_len < 16)
430 pad_len += 8;
431 if (pad_len) {
432 os_memcpy(keybuf, gsm->GTK[gsm->GN - 1], key_len);
433 os_memset(keybuf + key_len, 0, pad_len);
434 keybuf[key_len] = 0xdd;
435 key_len += pad_len;
436 key = keybuf;
437 } else
438 key = gsm->GTK[gsm->GN - 1];
439
440 /*
39eb4d08 441 * Sub-elem ID[1] | Length[1] | Key Info[2] | Key Length[1] | RSC[8] |
6fc6879b
JM		 442 * Key[5..32].
443 */
39eb4d08 444 subelem_len = 13 + key_len + 8;
6fc6879b
JM		 445 subelem = os_zalloc(subelem_len);
446 if (subelem == NULL)
447 return NULL;
448
449 subelem[0] = FTIE_SUBELEM_GTK;
39eb4d08
JM		 450 subelem[1] = 11 + key_len + 8;
451 /* Key ID in B0-B1 of Key Info */
452 WPA_PUT_LE16(&subelem[2], gsm->GN & 0x03);
453 subelem[4] = gsm->GTK_len;
454 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, subelem + 5);
455 if (aes_wrap(sm->PTK.kek, key_len / 8, key, subelem + 13)) {
6fc6879b
JM		 456 os_free(subelem);
457 return NULL;
458 }
459
460 *len = subelem_len;
461 return subelem;
462}
463
464
b27f13ed
JM		 465#ifdef CONFIG_IEEE80211W
466static u8 * wpa_ft_igtk_subelem(struct wpa_state_machine *sm, size_t *len)
467{
468 u8 *subelem, *pos;
469 struct wpa_group *gsm = sm->group;
470 size_t subelem_len;
471
ff89afb7
JM		 472 /* Sub-elem ID[1] | Length[1] | KeyID[2] | IPN[6] | Key Length[1] |
473 * Key[16+8] */
474 subelem_len = 1 + 1 + 2 + 6 + 1 + WPA_IGTK_LEN + 8;
b27f13ed
JM		 475 subelem = os_zalloc(subelem_len);
476 if (subelem == NULL)
477 return NULL;
478
479 pos = subelem;
480 *pos++ = FTIE_SUBELEM_IGTK;
481 *pos++ = subelem_len - 2;
482 WPA_PUT_LE16(pos, gsm->GN_igtk);
483 pos += 2;
9008a3e4 484 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos);
b27f13ed 485 pos += 6;
ff89afb7 486 *pos++ = WPA_IGTK_LEN;
b27f13ed
JM		 487 if (aes_wrap(sm->PTK.kek, WPA_IGTK_LEN / 8,
488 gsm->IGTK[gsm->GN_igtk - 4], pos)) {
489 os_free(subelem);
490 return NULL;
491 }
492
493 *len = subelem_len;
494 return subelem;
495}
496#endif /* CONFIG_IEEE80211W */
497
498
f238cf9f
JM		 499static u8 * wpa_ft_process_rdie(u8 *pos, u8 *end, u8 id, u8 descr_count,
500 const u8 *ies, size_t ies_len)
501{
502 struct ieee802_11_elems parse;
503 struct rsn_rdie *rdie;
504
505 wpa_printf(MSG_DEBUG, "FT: Resource Request: id=%d descr_count=%d",
506 id, descr_count);
507 wpa_hexdump(MSG_MSGDUMP, "FT: Resource descriptor IE(s)",
508 ies, ies_len);
509
510 if (end - pos < (int) sizeof(*rdie)) {
511 wpa_printf(MSG_ERROR, "FT: Not enough room for response RDIE");
512 return pos;
513 }
514
515 *pos++ = WLAN_EID_RIC_DATA;
516 *pos++ = sizeof(*rdie);
517 rdie = (struct rsn_rdie *) pos;
518 rdie->id = id;
519 rdie->descr_count = 0;
520 rdie->status_code = host_to_le16(WLAN_STATUS_SUCCESS);
521 pos += sizeof(*rdie);
522
523 if (ieee802_11_parse_elems((u8 *) ies, ies_len, &parse, 1) ==
524 ParseFailed) {
525 wpa_printf(MSG_DEBUG, "FT: Failed to parse request IEs");
526 rdie->status_code =
527 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
528 return pos;
529 }
530
fe6bdb77 531#ifdef NEED_AP_MLME
f238cf9f
JM		 532 if (parse.wmm_tspec) {
533 struct wmm_tspec_element *tspec;
534 int res;
535
536 if (parse.wmm_tspec_len + 2 < (int) sizeof(*tspec)) {
537 wpa_printf(MSG_DEBUG, "FT: Too short WMM TSPEC IE "
538 "(%d)", (int) parse.wmm_tspec_len);
539 rdie->status_code =
540 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
541 return pos;
542 }
543 if (end - pos < (int) sizeof(*tspec)) {
544 wpa_printf(MSG_ERROR, "FT: Not enough room for "
545 "response TSPEC");
546 rdie->status_code =
547 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
548 return pos;
549 }
550 tspec = (struct wmm_tspec_element *) pos;
551 os_memcpy(tspec, parse.wmm_tspec - 2, sizeof(*tspec));
552 res = wmm_process_tspec(tspec);
553 wpa_printf(MSG_DEBUG, "FT: ADDTS processing result: %d", res);
554 if (res == WMM_ADDTS_STATUS_INVALID_PARAMETERS)
555 rdie->status_code =
556 host_to_le16(WLAN_STATUS_INVALID_PARAMETERS);
557 else if (res == WMM_ADDTS_STATUS_REFUSED)
558 rdie->status_code =
559 host_to_le16(WLAN_STATUS_REQUEST_DECLINED);
560 else {
561 /* TSPEC accepted; include updated TSPEC in response */
562 rdie->descr_count = 1;
563 pos += sizeof(*tspec);
564 }
565 return pos;
566 }
fe6bdb77 567#endif /* NEED_AP_MLME */
f238cf9f
JM		 568
569 wpa_printf(MSG_DEBUG, "FT: No supported resource requested");
570 rdie->status_code = host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
571 return pos;
572}
573
574
575static u8 * wpa_ft_process_ric(u8 *pos, u8 *end, const u8 *ric, size_t ric_len)
576{
577 const u8 *rpos, *start;
578 const struct rsn_rdie *rdie;
579
580 wpa_hexdump(MSG_MSGDUMP, "FT: RIC Request", ric, ric_len);
581
582 rpos = ric;
583 while (rpos + sizeof(*rdie) < ric + ric_len) {
584 if (rpos[0] != WLAN_EID_RIC_DATA || rpos[1] < sizeof(*rdie) ||
585 rpos + 2 + rpos[1] > ric + ric_len)
586 break;
587 rdie = (const struct rsn_rdie *) (rpos + 2);
588 rpos += 2 + rpos[1];
589 start = rpos;
590
591 while (rpos + 2 <= ric + ric_len &&
592 rpos + 2 + rpos[1] <= ric + ric_len) {
593 if (rpos[0] == WLAN_EID_RIC_DATA)
594 break;
595 rpos += 2 + rpos[1];
596 }
597 pos = wpa_ft_process_rdie(pos, end, rdie->id,
598 rdie->descr_count,
599 start, rpos - start);
600 }
601
602 return pos;
603}
604
605
6fc6879b 606u8 * wpa_sm_write_assoc_resp_ies(struct wpa_state_machine *sm, u8 *pos,
f238cf9f
JM		 607 size_t max_len, int auth_alg,
608 const u8 *req_ies, size_t req_ies_len)
6fc6879b 609{
738a1cb2
JM		 610 u8 *end, *mdie, *ftie, *rsnie = NULL, *r0kh_id, *subelem = NULL;
611 size_t mdie_len, ftie_len, rsnie_len = 0, r0kh_id_len, subelem_len = 0;
6fc6879b
JM		 612 int res;
613 struct wpa_auth_config *conf;
614 struct rsn_ftie *_ftie;
f238cf9f
JM		 615 struct wpa_ft_ies parse;
616 u8 *ric_start;
6e80516a 617 u8 *anonce, *snonce;
6fc6879b
JM		 618
619 if (sm == NULL)
620 return pos;
621
622 conf = &sm->wpa_auth->conf;
623
624 if (sm->wpa_key_mgmt != WPA_KEY_MGMT_FT_IEEE8021X &&
625 sm->wpa_key_mgmt != WPA_KEY_MGMT_FT_PSK)
626 return pos;
627
628 end = pos + max_len;
629
738a1cb2
JM		 630 if (auth_alg == WLAN_AUTH_FT) {
631 /*
632 * RSN (only present if this is a Reassociation Response and
633 * part of a fast BSS transition)
634 */
635 res = wpa_write_rsn_ie(conf, pos, end - pos, sm->pmk_r1_name);
636 if (res < 0)
637 return pos;
638 rsnie = pos;
639 rsnie_len = res;
640 pos += res;
641 }
6fc6879b
JM		 642
643 /* Mobility Domain Information */
644 res = wpa_write_mdie(conf, pos, end - pos);
645 if (res < 0)
646 return pos;
647 mdie = pos;
648 mdie_len = res;
649 pos += res;
650
651 /* Fast BSS Transition Information */
652 if (auth_alg == WLAN_AUTH_FT) {
653 subelem = wpa_ft_gtk_subelem(sm, &subelem_len);
654 r0kh_id = sm->r0kh_id;
655 r0kh_id_len = sm->r0kh_id_len;
6e80516a
JM		 656 anonce = sm->ANonce;
657 snonce = sm->SNonce;
b27f13ed
JM		 658#ifdef CONFIG_IEEE80211W
659 if (sm->mgmt_frame_prot) {
660 u8 *igtk;
661 size_t igtk_len;
662 u8 *nbuf;
663 igtk = wpa_ft_igtk_subelem(sm, &igtk_len);
664 if (igtk == NULL) {
665 os_free(subelem);
666 return pos;
667 }
668 nbuf = os_realloc(subelem, subelem_len + igtk_len);
669 if (nbuf == NULL) {
670 os_free(subelem);
671 os_free(igtk);
672 return pos;
673 }
674 subelem = nbuf;
675 os_memcpy(subelem + subelem_len, igtk, igtk_len);
676 subelem_len += igtk_len;
677 os_free(igtk);
678 }
679#endif /* CONFIG_IEEE80211W */
6fc6879b
JM		 680 } else {
681 r0kh_id = conf->r0_key_holder;
682 r0kh_id_len = conf->r0_key_holder_len;
6e80516a
JM		 683 anonce = NULL;
684 snonce = NULL;
6fc6879b 685 }
6e80516a 686 res = wpa_write_ftie(conf, r0kh_id, r0kh_id_len, anonce, snonce, pos,
6fc6879b
JM		 687 end - pos, subelem, subelem_len);
688 os_free(subelem);
689 if (res < 0)
690 return pos;
691 ftie = pos;
692 ftie_len = res;
693 pos += res;
694
0f857f43
JM		 695 os_free(sm->assoc_resp_ftie);
696 sm->assoc_resp_ftie = os_malloc(ftie_len);
697 if (sm->assoc_resp_ftie)
698 os_memcpy(sm->assoc_resp_ftie, ftie, ftie_len);
699
6fc6879b 700 _ftie = (struct rsn_ftie *) (ftie + 2);
1f6e69e0
JM		 701 if (auth_alg == WLAN_AUTH_FT)
702 _ftie->mic_control[1] = 3; /* Information element count */
f238cf9f
JM		 703
704 ric_start = pos;
705 if (wpa_ft_parse_ies(req_ies, req_ies_len, &parse) == 0 && parse.ric) {
706 pos = wpa_ft_process_ric(pos, end, parse.ric, parse.ric_len);
1f6e69e0
JM		 707 if (auth_alg == WLAN_AUTH_FT)
708 _ftie->mic_control[1] +=
709 ieee802_11_ie_count(ric_start,
710 pos - ric_start);
f238cf9f
JM		 711 }
712 if (ric_start == pos)
713 ric_start = NULL;
714
1f6e69e0
JM		 715 if (auth_alg == WLAN_AUTH_FT &&
716 wpa_ft_mic(sm->PTK.kck, sm->addr, sm->wpa_auth->addr, 6,
6fc6879b 717 mdie, mdie_len, ftie, ftie_len,
f238cf9f
JM		 718 rsnie, rsnie_len,
719 ric_start, ric_start ? pos - ric_start : 0,
720 _ftie->mic) < 0)
6fc6879b
JM		 721 wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC");
722
723 return pos;
724}
725
726
6fc6879b
JM		 727static int wpa_ft_parse_ftie(const u8 *ie, size_t ie_len,
728 struct wpa_ft_ies *parse)
729{
730 const u8 *end, *pos;
731
732 parse->ftie = ie;
733 parse->ftie_len = ie_len;
734
735 pos = ie + sizeof(struct rsn_ftie);
736 end = ie + ie_len;
737
738 while (pos + 2 <= end && pos + 2 + pos[1] <= end) {
739 switch (pos[0]) {
740 case FTIE_SUBELEM_R1KH_ID:
741 if (pos[1] != FT_R1KH_ID_LEN) {
742 wpa_printf(MSG_DEBUG, "FT: Invalid R1KH-ID "
743 "length in FTIE: %d", pos[1]);
744 return -1;
745 }
746 parse->r1kh_id = pos + 2;
747 break;
748 case FTIE_SUBELEM_GTK:
749 parse->gtk = pos + 2;
750 parse->gtk_len = pos[1];
751 break;
752 case FTIE_SUBELEM_R0KH_ID:
753 if (pos[1] < 1 || pos[1] > FT_R0KH_ID_MAX_LEN) {
754 wpa_printf(MSG_DEBUG, "FT: Invalid R0KH-ID "
755 "length in FTIE: %d", pos[1]);
756 return -1;
757 }
758 parse->r0kh_id = pos + 2;
759 parse->r0kh_id_len = pos[1];
760 break;
761 }
762
763 pos += 2 + pos[1];
764 }
765
766 return 0;
767}
768
769
770static int wpa_ft_parse_ies(const u8 *ies, size_t ies_len,
771 struct wpa_ft_ies *parse)
772{
773 const u8 *end, *pos;
774 struct wpa_ie_data data;
775 int ret;
babfbf15
JM		 776 const struct rsn_ftie *ftie;
777 int prot_ie_count = 0;
6fc6879b
JM		 778
779 os_memset(parse, 0, sizeof(*parse));
780 if (ies == NULL)
781 return 0;
782
783 pos = ies;
784 end = ies + ies_len;
785 while (pos + 2 <= end && pos + 2 + pos[1] <= end) {
786 switch (pos[0]) {
787 case WLAN_EID_RSN:
788 parse->rsn = pos + 2;
789 parse->rsn_len = pos[1];
790 ret = wpa_parse_wpa_ie_rsn(parse->rsn - 2,
791 parse->rsn_len + 2,
792 &data);
793 if (ret < 0) {
794 wpa_printf(MSG_DEBUG, "FT: Failed to parse "
795 "RSN IE: %d", ret);
796 return -1;
797 }
798 if (data.num_pmkid == 1 && data.pmkid)
799 parse->rsn_pmkid = data.pmkid;
800 break;
801 case WLAN_EID_MOBILITY_DOMAIN:
802 parse->mdie = pos + 2;
803 parse->mdie_len = pos[1];
804 break;
805 case WLAN_EID_FAST_BSS_TRANSITION:
babfbf15
JM		 806 if (pos[1] < sizeof(*ftie))
807 return -1;
808 ftie = (const struct rsn_ftie *) (pos + 2);
809 prot_ie_count = ftie->mic_control[1];
6fc6879b
JM		 810 if (wpa_ft_parse_ftie(pos + 2, pos[1], parse) < 0)
811 return -1;
812 break;
babfbf15
JM		 813 case WLAN_EID_RIC_DATA:
814 if (parse->ric == NULL)
815 parse->ric = pos;
6fc6879b
JM		 816 }
817
818 pos += 2 + pos[1];
819 }
820
babfbf15
JM		 821 if (prot_ie_count == 0)
822 return 0; /* no MIC */
823
824 /*
825 * Check that the protected IE count matches with IEs included in the
826 * frame.
827 */
828 if (parse->rsn)
829 prot_ie_count--;
830 if (parse->mdie)
831 prot_ie_count--;
832 if (parse->ftie)
833 prot_ie_count--;
834 if (prot_ie_count < 0) {
835 wpa_printf(MSG_DEBUG, "FT: Some required IEs not included in "
836 "the protected IE count");
837 return -1;
838 }
839
840 if (prot_ie_count == 0 && parse->ric) {
841 wpa_printf(MSG_DEBUG, "FT: RIC IE(s) in the frame, but not "
842 "included in protected IE count");
843 return -1;
844 }
845
846 /* Determine the end of the RIC IE(s) */
847 pos = parse->ric;
848 while (pos && pos + 2 <= end && pos + 2 + pos[1] <= end &&
849 prot_ie_count) {
850 prot_ie_count--;
851 pos += 2 + pos[1];
852 }
853 parse->ric_len = pos - parse->ric;
854 if (prot_ie_count) {
855 wpa_printf(MSG_DEBUG, "FT: %d protected IEs missing from "
856 "frame", (int) prot_ie_count);
857 return -1;
858 }
859
6fc6879b
JM		 860 return 0;
861}
862
863
864static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
865 int vlan_id,
71934751 866 enum wpa_alg alg, const u8 *addr, int idx,
6fc6879b
JM		 867 u8 *key, size_t key_len)
868{
869 if (wpa_auth->cb.set_key == NULL)
870 return -1;
871 return wpa_auth->cb.set_key(wpa_auth->cb.ctx, vlan_id, alg, addr, idx,
872 key, key_len);
873}
874
875
0e84c254 876void wpa_ft_install_ptk(struct wpa_state_machine *sm)
6fc6879b 877{
71934751 878 enum wpa_alg alg;
6fc6879b
JM		 879 int klen;
880
881 /* MLME-SETKEYS.request(PTK) */
882 if (sm->pairwise == WPA_CIPHER_TKIP) {
89d39d9d 883 alg = WPA_ALG_TKIP;
6fc6879b
JM		 884 klen = 32;
885 } else if (sm->pairwise == WPA_CIPHER_CCMP) {
89d39d9d 886 alg = WPA_ALG_CCMP;
6fc6879b 887 klen = 16;
0e84c254
JM		 888 } else {
889 wpa_printf(MSG_DEBUG, "FT: Unknown pairwise alg 0x%x - skip "
890 "PTK configuration", sm->pairwise);
6fc6879b 891 return;
0e84c254 892 }
6fc6879b
JM		 893
894 /* FIX: add STA entry to kernel/driver here? The set_key will fail
895 * most likely without this.. At the moment, STA entry is added only
0e84c254
JM		 896 * after association has been completed. This function will be called
897 * again after association to get the PTK configured, but that could be
898 * optimized by adding the STA entry earlier.
6fc6879b
JM		 899 */
900 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
901 sm->PTK.tk1, klen))
902 return;
903
904 /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
905 sm->pairwise_set = TRUE;
906}
907
908
909static u16 wpa_ft_process_auth_req(struct wpa_state_machine *sm,
910 const u8 *ies, size_t ies_len,
911 u8 **resp_ies, size_t *resp_ies_len)
912{
913 struct rsn_mdie *mdie;
914 struct rsn_ftie *ftie;
915 u8 pmk_r1[PMK_LEN], pmk_r1_name[WPA_PMK_NAME_LEN];
916 u8 ptk_name[WPA_PMK_NAME_LEN];
917 struct wpa_auth_config *conf;
918 struct wpa_ft_ies parse;
c0a61908 919 size_t buflen, ptk_len;
6fc6879b
JM		 920 int ret;
921 u8 *pos, *end;
1b484d60 922 int pairwise;
6fc6879b
JM		 923
924 *resp_ies = NULL;
925 *resp_ies_len = 0;
926
927 sm->pmk_r1_name_valid = 0;
928 conf = &sm->wpa_auth->conf;
929
930 wpa_hexdump(MSG_DEBUG, "FT: Received authentication frame IEs",
931 ies, ies_len);
932
933 if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) {
934 wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs");
935 return WLAN_STATUS_UNSPECIFIED_FAILURE;
936 }
937
938 mdie = (struct rsn_mdie *) parse.mdie;
939 if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
940 os_memcmp(mdie->mobility_domain,
941 sm->wpa_auth->conf.mobility_domain,
942 MOBILITY_DOMAIN_ID_LEN) != 0) {
943 wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
944 return WLAN_STATUS_INVALID_MDIE;
945 }
946
947 ftie = (struct rsn_ftie *) parse.ftie;
948 if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
949 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
950 return WLAN_STATUS_INVALID_FTIE;
951 }
952
953 os_memcpy(sm->SNonce, ftie->snonce, WPA_NONCE_LEN);
954
955 if (parse.r0kh_id == NULL) {
956 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE - no R0KH-ID");
957 return WLAN_STATUS_INVALID_FTIE;
958 }
959
960 wpa_hexdump(MSG_DEBUG, "FT: STA R0KH-ID",
961 parse.r0kh_id, parse.r0kh_id_len);
962 os_memcpy(sm->r0kh_id, parse.r0kh_id, parse.r0kh_id_len);
963 sm->r0kh_id_len = parse.r0kh_id_len;
964
965 if (parse.rsn_pmkid == NULL) {
966 wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE");
967 return WLAN_STATUS_INVALID_PMKID;
968 }
969
970 wpa_hexdump(MSG_DEBUG, "FT: Requested PMKR0Name",
971 parse.rsn_pmkid, WPA_PMK_NAME_LEN);
972 wpa_derive_pmk_r1_name(parse.rsn_pmkid,
973 sm->wpa_auth->conf.r1_key_holder, sm->addr,
974 pmk_r1_name);
975 wpa_hexdump(MSG_DEBUG, "FT: Derived requested PMKR1Name",
976 pmk_r1_name, WPA_PMK_NAME_LEN);
977
1b484d60
JM		 978 if (wpa_ft_fetch_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1_name, pmk_r1,
979 &pairwise) < 0) {
6fc6879b
JM		 980 if (wpa_ft_pull_pmk_r1(sm->wpa_auth, sm->addr, sm->r0kh_id,
981 sm->r0kh_id_len, parse.rsn_pmkid) < 0) {
982 wpa_printf(MSG_DEBUG, "FT: Did not have matching "
983 "PMK-R1 and unknown R0KH-ID");
984 return WLAN_STATUS_INVALID_PMKID;
985 }
986
987 /*
988 * TODO: Should return "status pending" (and the caller should
989 * not send out response now). The real response will be sent
990 * once the response from R0KH is received.
991 */
992 return WLAN_STATUS_INVALID_PMKID;
993 }
994
995 wpa_hexdump_key(MSG_DEBUG, "FT: Selected PMK-R1", pmk_r1, PMK_LEN);
996 sm->pmk_r1_name_valid = 1;
997 os_memcpy(sm->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN);
998
999 if (os_get_random(sm->ANonce, WPA_NONCE_LEN)) {
1000 wpa_printf(MSG_DEBUG, "FT: Failed to get random data for "
1001 "ANonce");
1002 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1003 }
1004
1005 wpa_hexdump(MSG_DEBUG, "FT: Received SNonce",
1006 sm->SNonce, WPA_NONCE_LEN);
1007 wpa_hexdump(MSG_DEBUG, "FT: Generated ANonce",
1008 sm->ANonce, WPA_NONCE_LEN);
1009
1b484d60 1010 ptk_len = pairwise != WPA_CIPHER_CCMP ? 64 : 48;
6fc6879b
JM		 1011 wpa_pmk_r1_to_ptk(pmk_r1, sm->SNonce, sm->ANonce, sm->addr,
1012 sm->wpa_auth->addr, pmk_r1_name,
c0a61908 1013 (u8 *) &sm->PTK, ptk_len, ptk_name);
6fc6879b 1014 wpa_hexdump_key(MSG_DEBUG, "FT: PTK",
c0a61908 1015 (u8 *) &sm->PTK, ptk_len);
6fc6879b
JM		 1016 wpa_hexdump(MSG_DEBUG, "FT: PTKName", ptk_name, WPA_PMK_NAME_LEN);
1017
0e84c254 1018 sm->pairwise = pairwise;
6fc6879b
JM		 1019 wpa_ft_install_ptk(sm);
1020
1021 buflen = 2 + sizeof(struct rsn_mdie) + 2 + sizeof(struct rsn_ftie) +
1022 2 + FT_R1KH_ID_LEN + 200;
1023 *resp_ies = os_zalloc(buflen);
1024 if (*resp_ies == NULL) {
1025 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1026 }
1027
1028 pos = *resp_ies;
1029 end = *resp_ies + buflen;
1030
1031 ret = wpa_write_rsn_ie(conf, pos, end - pos, parse.rsn_pmkid);
1032 if (ret < 0) {
1033 os_free(*resp_ies);
1034 *resp_ies = NULL;
1035 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1036 }
1037 pos += ret;
1038
1039 ret = wpa_write_mdie(conf, pos, end - pos);
1040 if (ret < 0) {
1041 os_free(*resp_ies);
1042 *resp_ies = NULL;
1043 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1044 }
1045 pos += ret;
1046
1047 ret = wpa_write_ftie(conf, parse.r0kh_id, parse.r0kh_id_len,
1048 sm->ANonce, sm->SNonce, pos, end - pos, NULL, 0);
1049 if (ret < 0) {
1050 os_free(*resp_ies);
1051 *resp_ies = NULL;
1052 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1053 }
1054 pos += ret;
1055
1056 *resp_ies_len = pos - *resp_ies;
1057
1058 return WLAN_STATUS_SUCCESS;
1059}
1060
1061
1062void wpa_ft_process_auth(struct wpa_state_machine *sm, const u8 *bssid,
1063 u16 auth_transaction, const u8 *ies, size_t ies_len,
1064 void (*cb)(void *ctx, const u8 *dst, const u8 *bssid,
1065 u16 auth_transaction, u16 status,
1066 const u8 *ies, size_t ies_len),
1067 void *ctx)
1068{
1069 u16 status;
1070 u8 *resp_ies;
1071 size_t resp_ies_len;
1072
1073 if (sm == NULL) {
1074 wpa_printf(MSG_DEBUG, "FT: Received authentication frame, but "
1075 "WPA SM not available");
1076 return;
1077 }
1078
1079 wpa_printf(MSG_DEBUG, "FT: Received authentication frame: STA=" MACSTR
1080 " BSSID=" MACSTR " transaction=%d",
1081 MAC2STR(sm->addr), MAC2STR(bssid), auth_transaction);
1082 status = wpa_ft_process_auth_req(sm, ies, ies_len, &resp_ies,
1083 &resp_ies_len);
1084
1085 wpa_printf(MSG_DEBUG, "FT: FT authentication response: dst=" MACSTR
1086 " auth_transaction=%d status=%d",
1087 MAC2STR(sm->addr), auth_transaction + 1, status);
1088 wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len);
1089 cb(ctx, sm->addr, bssid, auth_transaction + 1, status,
1090 resp_ies, resp_ies_len);
1091 os_free(resp_ies);
1092}
1093
1094
1095u16 wpa_ft_validate_reassoc(struct wpa_state_machine *sm, const u8 *ies,
1096 size_t ies_len)
1097{
1098 struct wpa_ft_ies parse;
1099 struct rsn_mdie *mdie;
1100 struct rsn_ftie *ftie;
1101 u8 mic[16];
8aaf894d 1102 unsigned int count;
6fc6879b
JM		 1103
1104 if (sm == NULL)
1105 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1106
1107 wpa_hexdump(MSG_DEBUG, "FT: Reassoc Req IEs", ies, ies_len);
1108
1109 if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) {
1110 wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs");
1111 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1112 }
1113
1114 if (parse.rsn == NULL) {
1115 wpa_printf(MSG_DEBUG, "FT: No RSNIE in Reassoc Req");
1116 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1117 }
1118
1119 if (parse.rsn_pmkid == NULL) {
1120 wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE");
1121 return WLAN_STATUS_INVALID_PMKID;
1122 }
1123
1124 if (os_memcmp(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN) != 0)
1125 {
1126 wpa_printf(MSG_DEBUG, "FT: PMKID in Reassoc Req did not match "
1127 "with the PMKR1Name derived from auth request");
1128 return WLAN_STATUS_INVALID_PMKID;
1129 }
1130
1131 mdie = (struct rsn_mdie *) parse.mdie;
1132 if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
1133 os_memcmp(mdie->mobility_domain,
1134 sm->wpa_auth->conf.mobility_domain,
1135 MOBILITY_DOMAIN_ID_LEN) != 0) {
1136 wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
1137 return WLAN_STATUS_INVALID_MDIE;
1138 }
1139
1140 ftie = (struct rsn_ftie *) parse.ftie;
1141 if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
1142 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
1143 return WLAN_STATUS_INVALID_FTIE;
1144 }
1145
0ae145cd
JM		 1146 if (os_memcmp(ftie->snonce, sm->SNonce, WPA_NONCE_LEN) != 0) {
1147 wpa_printf(MSG_DEBUG, "FT: SNonce mismatch in FTIE");
1148 wpa_hexdump(MSG_DEBUG, "FT: Received SNonce",
1149 ftie->snonce, WPA_NONCE_LEN);
1150 wpa_hexdump(MSG_DEBUG, "FT: Expected SNonce",
1151 sm->SNonce, WPA_NONCE_LEN);
1152 return -1;
1153 }
1154
1155 if (os_memcmp(ftie->anonce, sm->ANonce, WPA_NONCE_LEN) != 0) {
1156 wpa_printf(MSG_DEBUG, "FT: ANonce mismatch in FTIE");
1157 wpa_hexdump(MSG_DEBUG, "FT: Received ANonce",
1158 ftie->anonce, WPA_NONCE_LEN);
1159 wpa_hexdump(MSG_DEBUG, "FT: Expected ANonce",
1160 sm->ANonce, WPA_NONCE_LEN);
1161 return -1;
1162 }
1163
1164
1165 if (parse.r0kh_id == NULL) {
1166 wpa_printf(MSG_DEBUG, "FT: No R0KH-ID subelem in FTIE");
1167 return -1;
1168 }
1169
1170 if (parse.r0kh_id_len != sm->r0kh_id_len ||
1171 os_memcmp(parse.r0kh_id, sm->r0kh_id, parse.r0kh_id_len) != 0) {
1172 wpa_printf(MSG_DEBUG, "FT: R0KH-ID in FTIE did not match with "
1173 "the current R0KH-ID");
1174 wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID in FTIE",
1175 parse.r0kh_id, parse.r0kh_id_len);
1176 wpa_hexdump(MSG_DEBUG, "FT: The current R0KH-ID",
1177 sm->r0kh_id, sm->r0kh_id_len);
1178 return -1;
1179 }
1180
1181 if (parse.r1kh_id == NULL) {
1182 wpa_printf(MSG_DEBUG, "FT: No R1KH-ID subelem in FTIE");
1183 return -1;
1184 }
1185
1186 if (os_memcmp(parse.r1kh_id, sm->wpa_auth->conf.r1_key_holder,
1187 FT_R1KH_ID_LEN) != 0) {
1188 wpa_printf(MSG_DEBUG, "FT: Unknown R1KH-ID used in "
1189 "ReassocReq");
1190 wpa_hexdump(MSG_DEBUG, "FT: R1KH-ID in FTIE",
1191 parse.r1kh_id, FT_R1KH_ID_LEN);
1192 wpa_hexdump(MSG_DEBUG, "FT: Expected R1KH-ID",
1193 sm->wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN);
1194 return -1;
1195 }
1196
1197 if (parse.rsn_pmkid == NULL ||
1198 os_memcmp(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN)) {
1199 wpa_printf(MSG_DEBUG, "FT: No matching PMKR1Name (PMKID) in "
1200 "RSNIE (pmkid=%d)", !!parse.rsn_pmkid);
1201 return -1;
1202 }
1203
8aaf894d
JM		 1204 count = 3;
1205 if (parse.ric)
1206 count++;
1207 if (ftie->mic_control[1] != count) {
1208 wpa_printf(MSG_DEBUG, "FT: Unexpected IE count in MIC "
1209 "Control: received %u expected %u",
1210 ftie->mic_control[1], count);
1211 return -1;
1212 }
1213
6fc6879b
JM		 1214 if (wpa_ft_mic(sm->PTK.kck, sm->addr, sm->wpa_auth->addr, 5,
1215 parse.mdie - 2, parse.mdie_len + 2,
1216 parse.ftie - 2, parse.ftie_len + 2,
babfbf15
JM		 1217 parse.rsn - 2, parse.rsn_len + 2,
1218 parse.ric, parse.ric_len,
6fc6879b
JM		 1219 mic) < 0) {
1220 wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC");
1221 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1222 }
1223
1224 if (os_memcmp(mic, ftie->mic, 16) != 0) {
1225 wpa_printf(MSG_DEBUG, "FT: Invalid MIC in FTIE");
1226 wpa_hexdump(MSG_MSGDUMP, "FT: Received MIC", ftie->mic, 16);
1227 wpa_hexdump(MSG_MSGDUMP, "FT: Calculated MIC", mic, 16);
1228 return WLAN_STATUS_INVALID_FTIE;
1229 }
1230
1231 return WLAN_STATUS_SUCCESS;
1232}
1233
1234
1235int wpa_ft_action_rx(struct wpa_state_machine *sm, const u8 *data, size_t len)
1236{
1237 const u8 *sta_addr, *target_ap;
1238 const u8 *ies;
1239 size_t ies_len;
1240 u8 action;
1241 struct ft_rrb_frame *frame;
1242
1243 if (sm == NULL)
1244 return -1;
1245
1246 /*
1247 * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6]
1248 * FT Request action frame body[variable]
1249 */
1250
1251 if (len < 14) {
1252 wpa_printf(MSG_DEBUG, "FT: Too short FT Action frame "
1253 "(len=%lu)", (unsigned long) len);
1254 return -1;
1255 }
1256
1257 action = data[1];
1258 sta_addr = data + 2;
1259 target_ap = data + 8;
1260 ies = data + 14;
1261 ies_len = len - 14;
1262
1263 wpa_printf(MSG_DEBUG, "FT: Received FT Action frame (STA=" MACSTR
1264 " Target AP=" MACSTR " Action=%d)",
1265 MAC2STR(sta_addr), MAC2STR(target_ap), action);
1266
1267 if (os_memcmp(sta_addr, sm->addr, ETH_ALEN) != 0) {
1268 wpa_printf(MSG_DEBUG, "FT: Mismatch in FT Action STA address: "
1269 "STA=" MACSTR " STA-Address=" MACSTR,
1270 MAC2STR(sm->addr), MAC2STR(sta_addr));
1271 return -1;
1272 }
1273
1274 /*
1275 * Do some sanity checking on the target AP address (not own and not
1276 * broadcast. This could be extended to filter based on a list of known
1277 * APs in the MD (if such a list were configured).
1278 */
1279 if ((target_ap[0] & 0x01) ||
1280 os_memcmp(target_ap, sm->wpa_auth->addr, ETH_ALEN) == 0) {
1281 wpa_printf(MSG_DEBUG, "FT: Invalid Target AP in FT Action "
1282 "frame");
1283 return -1;
1284 }
1285
1286 wpa_hexdump(MSG_MSGDUMP, "FT: Action frame body", ies, ies_len);
1287
1288 /* RRB - Forward action frame to the target AP */
1289 frame = os_malloc(sizeof(*frame) + len);
1290 frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1291 frame->packet_type = FT_PACKET_REQUEST;
1292 frame->action_length = host_to_le16(len);
1293 os_memcpy(frame->ap_address, sm->wpa_auth->addr, ETH_ALEN);
1294 os_memcpy(frame + 1, data, len);
1295
1296 wpa_ft_rrb_send(sm->wpa_auth, target_ap, (u8 *) frame,
1297 sizeof(*frame) + len);
1298 os_free(frame);
1299
1300 return 0;
1301}
1302
1303
1304static int wpa_ft_rrb_rx_request(struct wpa_authenticator *wpa_auth,
1305 const u8 *current_ap, const u8 *sta_addr,
1306 const u8 *body, size_t len)
1307{
1308 struct wpa_state_machine *sm;
1309 u16 status;
1310 u8 *resp_ies, *pos;
1311 size_t resp_ies_len, rlen;
1312 struct ft_rrb_frame *frame;
1313
1314 sm = wpa_ft_add_sta(wpa_auth, sta_addr);
1315 if (sm == NULL) {
1316 wpa_printf(MSG_DEBUG, "FT: Failed to add new STA based on "
1317 "RRB Request");
1318 return -1;
1319 }
1320
1321 wpa_hexdump(MSG_MSGDUMP, "FT: RRB Request Frame body", body, len);
1322
1323 status = wpa_ft_process_auth_req(sm, body, len, &resp_ies,
1324 &resp_ies_len);
1325
1326 wpa_printf(MSG_DEBUG, "FT: RRB authentication response: STA=" MACSTR
1327 " CurrentAP=" MACSTR " status=%d",
1328 MAC2STR(sm->addr), MAC2STR(current_ap), status);
1329 wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len);
1330
1331 /* RRB - Forward action frame response to the Current AP */
1332
1333 /*
1334 * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6]
1335 * Status_Code[2] FT Request action frame body[variable]
1336 */
1337 rlen = 2 + 2 * ETH_ALEN + 2 + resp_ies_len;
1338
1339 frame = os_malloc(sizeof(*frame) + rlen);
1340 frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1341 frame->packet_type = FT_PACKET_RESPONSE;
1342 frame->action_length = host_to_le16(rlen);
1343 os_memcpy(frame->ap_address, wpa_auth->addr, ETH_ALEN);
1344 pos = (u8 *) (frame + 1);
1345 *pos++ = WLAN_ACTION_FT;
1346 *pos++ = 2; /* Action: Response */
1347 os_memcpy(pos, sta_addr, ETH_ALEN);
1348 pos += ETH_ALEN;
1349 os_memcpy(pos, wpa_auth->addr, ETH_ALEN);
1350 pos += ETH_ALEN;
1351 WPA_PUT_LE16(pos, status);
1352 pos += 2;
1353 if (resp_ies) {
1354 os_memcpy(pos, resp_ies, resp_ies_len);
1355 os_free(resp_ies);
1356 }
1357
1358 wpa_ft_rrb_send(wpa_auth, current_ap, (u8 *) frame,
1359 sizeof(*frame) + rlen);
1360 os_free(frame);
1361
1362 return 0;
1363}
1364
1365
1366static int wpa_ft_rrb_rx_pull(struct wpa_authenticator *wpa_auth,
1367 const u8 *src_addr,
1368 const u8 *data, size_t data_len)
1369{
1370 struct ft_r0kh_r1kh_pull_frame *frame, f;
1371 struct ft_remote_r1kh *r1kh;
1372 struct ft_r0kh_r1kh_resp_frame resp, r;
1373 u8 pmk_r0[PMK_LEN];
1b484d60 1374 int pairwise;
6fc6879b
JM		 1375
1376 wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull");
1377
1378 if (data_len < sizeof(*frame))
1379 return -1;
1380
1381 r1kh = wpa_auth->conf.r1kh_list;
1382 while (r1kh) {
1383 if (os_memcmp(r1kh->addr, src_addr, ETH_ALEN) == 0)
1384 break;
1385 r1kh = r1kh->next;
1386 }
1387 if (r1kh == NULL) {
1388 wpa_printf(MSG_DEBUG, "FT: No matching R1KH address found for "
1389 "PMK-R1 pull source address " MACSTR,
1390 MAC2STR(src_addr));
1391 return -1;
1392 }
1393
1394 frame = (struct ft_r0kh_r1kh_pull_frame *) data;
1395 /* aes_unwrap() does not support inplace decryption, so use a temporary
1396 * buffer for the data. */
1397 if (aes_unwrap(r1kh->key, (FT_R0KH_R1KH_PULL_DATA_LEN + 7) / 8,
1398 frame->nonce, f.nonce) < 0) {
1399 wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 pull "
1400 "request from " MACSTR, MAC2STR(src_addr));
1401 return -1;
1402 }
1403
1404 wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - nonce",
1405 f.nonce, sizeof(f.nonce));
1406 wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - PMKR0Name",
1407 f.pmk_r0_name, WPA_PMK_NAME_LEN);
1408 wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull - R1KH-ID=" MACSTR "S1KH-ID="
1409 MACSTR, MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id));
1410
1411 os_memset(&resp, 0, sizeof(resp));
1412 resp.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1413 resp.packet_type = FT_PACKET_R0KH_R1KH_RESP;
1414 resp.data_length = host_to_le16(FT_R0KH_R1KH_RESP_DATA_LEN);
1415 os_memcpy(resp.ap_address, wpa_auth->addr, ETH_ALEN);
1416
1417 /* aes_wrap() does not support inplace encryption, so use a temporary
1418 * buffer for the data. */
1419 os_memcpy(r.nonce, f.nonce, sizeof(f.nonce));
1420 os_memcpy(r.r1kh_id, f.r1kh_id, FT_R1KH_ID_LEN);
1421 os_memcpy(r.s1kh_id, f.s1kh_id, ETH_ALEN);
1b484d60
JM		 1422 if (wpa_ft_fetch_pmk_r0(wpa_auth, f.s1kh_id, f.pmk_r0_name, pmk_r0,
1423 &pairwise) < 0) {
6fc6879b
JM		 1424 wpa_printf(MSG_DEBUG, "FT: No matching PMKR0Name found for "
1425 "PMK-R1 pull");
1426 return -1;
1427 }
1428
1429 wpa_derive_pmk_r1(pmk_r0, f.pmk_r0_name, f.r1kh_id, f.s1kh_id,
1430 r.pmk_r1, r.pmk_r1_name);
1431 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", r.pmk_r1, PMK_LEN);
1432 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", r.pmk_r1_name,
1433 WPA_PMK_NAME_LEN);
e9501a07 1434 r.pairwise = host_to_le16(pairwise);
6fc6879b
JM		 1435
1436 if (aes_wrap(r1kh->key, (FT_R0KH_R1KH_RESP_DATA_LEN + 7) / 8,
1437 r.nonce, resp.nonce) < 0) {
1438 os_memset(pmk_r0, 0, PMK_LEN);
1439 return -1;
1440 }
1441
1442 os_memset(pmk_r0, 0, PMK_LEN);
1443
1444 wpa_ft_rrb_send(wpa_auth, src_addr, (u8 *) &resp, sizeof(resp));
1445
1446 return 0;
1447}
1448
1449
1450static int wpa_ft_rrb_rx_resp(struct wpa_authenticator *wpa_auth,
1451 const u8 *src_addr,
1452 const u8 *data, size_t data_len)
1453{
1454 struct ft_r0kh_r1kh_resp_frame *frame, f;
1455 struct ft_remote_r0kh *r0kh;
1b484d60 1456 int pairwise;
6fc6879b
JM		 1457
1458 wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull response");
1459
1460 if (data_len < sizeof(*frame))
1461 return -1;
1462
1463 r0kh = wpa_auth->conf.r0kh_list;
1464 while (r0kh) {
1465 if (os_memcmp(r0kh->addr, src_addr, ETH_ALEN) == 0)
1466 break;
1467 r0kh = r0kh->next;
1468 }
1469 if (r0kh == NULL) {
1470 wpa_printf(MSG_DEBUG, "FT: No matching R0KH address found for "
1471 "PMK-R0 pull response source address " MACSTR,
1472 MAC2STR(src_addr));
1473 return -1;
1474 }
1475
1476 frame = (struct ft_r0kh_r1kh_resp_frame *) data;
1477 /* aes_unwrap() does not support inplace decryption, so use a temporary
1478 * buffer for the data. */
1479 if (aes_unwrap(r0kh->key, (FT_R0KH_R1KH_RESP_DATA_LEN + 7) / 8,
1480 frame->nonce, f.nonce) < 0) {
1481 wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 pull "
1482 "response from " MACSTR, MAC2STR(src_addr));
1483 return -1;
1484 }
1485
1486 if (os_memcmp(f.r1kh_id, wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN)
1487 != 0) {
1488 wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull response did not use a "
1489 "matching R1KH-ID");
1490 return -1;
1491 }
1492
1493 /* TODO: verify that <nonce,s1kh_id> matches with a pending request
1494 * and call this requests callback function to finish request
1495 * processing */
1496
1b484d60 1497 pairwise = le_to_host16(f.pairwise);
6fc6879b
JM		 1498 wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - nonce",
1499 f.nonce, sizeof(f.nonce));
1500 wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull - R1KH-ID=" MACSTR "S1KH-ID="
1b484d60
JM		 1501 MACSTR " pairwise=0x%x",
1502 MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id), pairwise);
6fc6879b
JM		 1503 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1 pull - PMK-R1",
1504 f.pmk_r1, PMK_LEN);
1505 wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - PMKR1Name",
1506 f.pmk_r1_name, WPA_PMK_NAME_LEN);
1507
1b484d60
JM		 1508 wpa_ft_store_pmk_r1(wpa_auth, f.s1kh_id, f.pmk_r1, f.pmk_r1_name,
1509 pairwise);
6fc6879b
JM		 1510 os_memset(f.pmk_r1, 0, PMK_LEN);
1511
1512 return 0;
1513}
1514
1515
1516static int wpa_ft_rrb_rx_push(struct wpa_authenticator *wpa_auth,
1517 const u8 *src_addr,
1518 const u8 *data, size_t data_len)
1519{
1520 struct ft_r0kh_r1kh_push_frame *frame, f;
1521 struct ft_remote_r0kh *r0kh;
1522 struct os_time now;
1523 os_time_t tsend;
1b484d60 1524 int pairwise;
6fc6879b
JM		 1525
1526 wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 push");
1527
1528 if (data_len < sizeof(*frame))
1529 return -1;
1530
1531 r0kh = wpa_auth->conf.r0kh_list;
1532 while (r0kh) {
1533 if (os_memcmp(r0kh->addr, src_addr, ETH_ALEN) == 0)
1534 break;
1535 r0kh = r0kh->next;
1536 }
1537 if (r0kh == NULL) {
1538 wpa_printf(MSG_DEBUG, "FT: No matching R0KH address found for "
1539 "PMK-R0 push source address " MACSTR,
1540 MAC2STR(src_addr));
1541 return -1;
1542 }
1543
1544 frame = (struct ft_r0kh_r1kh_push_frame *) data;
1545 /* aes_unwrap() does not support inplace decryption, so use a temporary
1546 * buffer for the data. */
1547 if (aes_unwrap(r0kh->key, (FT_R0KH_R1KH_PUSH_DATA_LEN + 7) / 8,
1548 frame->timestamp, f.timestamp) < 0) {
1549 wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 push from "
1550 MACSTR, MAC2STR(src_addr));
1551 return -1;
1552 }
1553
1554 os_get_time(&now);
1555 tsend = WPA_GET_LE32(f.timestamp);
1556 if ((now.sec > tsend && now.sec - tsend > 60) ||
1557 (now.sec < tsend && tsend - now.sec > 60)) {
1558 wpa_printf(MSG_DEBUG, "FT: PMK-R1 push did not have a valid "
1559 "timestamp: sender time %d own time %d\n",
1560 (int) tsend, (int) now.sec);
1561 return -1;
1562 }
1563
1564 if (os_memcmp(f.r1kh_id, wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN)
1565 != 0) {
1566 wpa_printf(MSG_DEBUG, "FT: PMK-R1 push did not use a matching "
1567 "R1KH-ID (received " MACSTR " own " MACSTR ")",
1568 MAC2STR(f.r1kh_id),
1569 MAC2STR(wpa_auth->conf.r1_key_holder));
1570 return -1;
1571 }
1572
1b484d60 1573 pairwise = le_to_host16(f.pairwise);
6fc6879b 1574 wpa_printf(MSG_DEBUG, "FT: PMK-R1 push - R1KH-ID=" MACSTR " S1KH-ID="
1b484d60
JM		 1575 MACSTR " pairwise=0x%x",
1576 MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id), pairwise);
6fc6879b
JM		 1577 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1 push - PMK-R1",
1578 f.pmk_r1, PMK_LEN);
1579 wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 push - PMKR1Name",
1580 f.pmk_r1_name, WPA_PMK_NAME_LEN);
1581
1b484d60
JM		 1582 wpa_ft_store_pmk_r1(wpa_auth, f.s1kh_id, f.pmk_r1, f.pmk_r1_name,
1583 pairwise);
6fc6879b
JM		 1584 os_memset(f.pmk_r1, 0, PMK_LEN);
1585
1586 return 0;
1587}
1588
1589
1590int wpa_ft_rrb_rx(struct wpa_authenticator *wpa_auth, const u8 *src_addr,
1591 const u8 *data, size_t data_len)
1592{
1593 struct ft_rrb_frame *frame;
1594 u16 alen;
1595 const u8 *pos, *end, *start;
1596 u8 action;
1597 const u8 *sta_addr, *target_ap_addr;
1598
1599 wpa_printf(MSG_DEBUG, "FT: RRB received frame from remote AP " MACSTR,
1600 MAC2STR(src_addr));
1601
1602 if (data_len < sizeof(*frame)) {
1603 wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (data_len=%lu)",
1604 (unsigned long) data_len);
1605 return -1;
1606 }
1607
1608 pos = data;
1609 frame = (struct ft_rrb_frame *) pos;
1610 pos += sizeof(*frame);
1611
1612 alen = le_to_host16(frame->action_length);
1613 wpa_printf(MSG_DEBUG, "FT: RRB frame - frame_type=%d packet_type=%d "
1614 "action_length=%d ap_address=" MACSTR,
1615 frame->frame_type, frame->packet_type, alen,
1616 MAC2STR(frame->ap_address));
1617
1618 if (frame->frame_type != RSN_REMOTE_FRAME_TYPE_FT_RRB) {
c1e033b0 1619 /* Discard frame per IEEE Std 802.11r-2008, 11A.10.3 */
6fc6879b
JM		 1620 wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with "
1621 "unrecognized type %d", frame->frame_type);
1622 return -1;
1623 }
1624
1625 if (alen > data_len - sizeof(*frame)) {
1626 wpa_printf(MSG_DEBUG, "FT: RRB frame too short for action "
1627 "frame");
1628 return -1;
1629 }
1630
1631 if (frame->packet_type == FT_PACKET_R0KH_R1KH_PULL)
1632 return wpa_ft_rrb_rx_pull(wpa_auth, src_addr, data, data_len);
1633 if (frame->packet_type == FT_PACKET_R0KH_R1KH_RESP)
1634 return wpa_ft_rrb_rx_resp(wpa_auth, src_addr, data, data_len);
1635 if (frame->packet_type == FT_PACKET_R0KH_R1KH_PUSH)
1636 return wpa_ft_rrb_rx_push(wpa_auth, src_addr, data, data_len);
1637
1638 wpa_hexdump(MSG_MSGDUMP, "FT: RRB - FT Action frame", pos, alen);
1639
1640 if (alen < 1 + 1 + 2 * ETH_ALEN) {
1641 wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (not enough "
1642 "room for Action Frame body); alen=%lu",
1643 (unsigned long) alen);
1644 return -1;
1645 }
1646 start = pos;
1647 end = pos + alen;
1648
1649 if (*pos != WLAN_ACTION_FT) {
1650 wpa_printf(MSG_DEBUG, "FT: Unexpected Action frame category "
1651 "%d", *pos);
1652 return -1;
1653 }
1654
1655 pos++;
1656 action = *pos++;
1657 sta_addr = pos;
1658 pos += ETH_ALEN;
1659 target_ap_addr = pos;
1660 pos += ETH_ALEN;
1661 wpa_printf(MSG_DEBUG, "FT: RRB Action Frame: action=%d sta_addr="
1662 MACSTR " target_ap_addr=" MACSTR,
1663 action, MAC2STR(sta_addr), MAC2STR(target_ap_addr));
1664
1665 if (frame->packet_type == FT_PACKET_REQUEST) {
1666 wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Request");
1667
1668 if (action != 1) {
1669 wpa_printf(MSG_DEBUG, "FT: Unexpected Action %d in "
1670 "RRB Request", action);
1671 return -1;
1672 }
1673
1674 if (os_memcmp(target_ap_addr, wpa_auth->addr, ETH_ALEN) != 0) {
1675 wpa_printf(MSG_DEBUG, "FT: Target AP address in the "
1676 "RRB Request does not match with own "
1677 "address");
1678 return -1;
1679 }
1680
1681 if (wpa_ft_rrb_rx_request(wpa_auth, frame->ap_address,
1682 sta_addr, pos, end - pos) < 0)
1683 return -1;
1684 } else if (frame->packet_type == FT_PACKET_RESPONSE) {
1685 u16 status_code;
1686
1687 if (end - pos < 2) {
1688 wpa_printf(MSG_DEBUG, "FT: Not enough room for status "
1689 "code in RRB Response");
1690 return -1;
1691 }
1692 status_code = WPA_GET_LE16(pos);
1693 pos += 2;
1694
1695 wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Response "
1696 "(status_code=%d)", status_code);
1697
1698 if (wpa_ft_action_send(wpa_auth, sta_addr, start, alen) < 0)
1699 return -1;
1700 } else {
1701 wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with unknown "
1702 "packet_type %d", frame->packet_type);
1703 return -1;
1704 }
1705
1706 return 0;
1707}
1708
1709
1710static void wpa_ft_generate_pmk_r1(struct wpa_authenticator *wpa_auth,
1711 struct wpa_ft_pmk_r0_sa *pmk_r0,
1712 struct ft_remote_r1kh *r1kh,
1b484d60 1713 const u8 *s1kh_id, int pairwise)
6fc6879b
JM		 1714{
1715 struct ft_r0kh_r1kh_push_frame frame, f;
1716 struct os_time now;
1717
1718 os_memset(&frame, 0, sizeof(frame));
1719 frame.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1720 frame.packet_type = FT_PACKET_R0KH_R1KH_PUSH;
1721 frame.data_length = host_to_le16(FT_R0KH_R1KH_PUSH_DATA_LEN);
1722 os_memcpy(frame.ap_address, wpa_auth->addr, ETH_ALEN);
1723
1724 /* aes_wrap() does not support inplace encryption, so use a temporary
1725 * buffer for the data. */
1726 os_memcpy(f.r1kh_id, r1kh->id, FT_R1KH_ID_LEN);
1727 os_memcpy(f.s1kh_id, s1kh_id, ETH_ALEN);
1728 os_memcpy(f.pmk_r0_name, pmk_r0->pmk_r0_name, WPA_PMK_NAME_LEN);
1729 wpa_derive_pmk_r1(pmk_r0->pmk_r0, pmk_r0->pmk_r0_name, r1kh->id,
1730 s1kh_id, f.pmk_r1, f.pmk_r1_name);
1731 wpa_printf(MSG_DEBUG, "FT: R1KH-ID " MACSTR, MAC2STR(r1kh->id));
1732 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", f.pmk_r1, PMK_LEN);
1733 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", f.pmk_r1_name,
1734 WPA_PMK_NAME_LEN);
1735 os_get_time(&now);
1736 WPA_PUT_LE32(f.timestamp, now.sec);
e9501a07 1737 f.pairwise = host_to_le16(pairwise);
6fc6879b
JM		 1738 if (aes_wrap(r1kh->key, (FT_R0KH_R1KH_PUSH_DATA_LEN + 7) / 8,
1739 f.timestamp, frame.timestamp) < 0)
1740 return;
1741
1742 wpa_ft_rrb_send(wpa_auth, r1kh->addr, (u8 *) &frame, sizeof(frame));
1743}
1744
1745
1746void wpa_ft_push_pmk_r1(struct wpa_authenticator *wpa_auth, const u8 *addr)
1747{
1748 struct wpa_ft_pmk_r0_sa *r0;
1749 struct ft_remote_r1kh *r1kh;
1750
1751 if (!wpa_auth->conf.pmk_r1_push)
1752 return;
1753
1754 r0 = wpa_auth->ft_pmk_cache->pmk_r0;
1755 while (r0) {
1756 if (os_memcmp(r0->spa, addr, ETH_ALEN) == 0)
1757 break;
1758 r0 = r0->next;
1759 }
1760
1761 if (r0 == NULL || r0->pmk_r1_pushed)
1762 return;
1763 r0->pmk_r1_pushed = 1;
1764
1765 wpa_printf(MSG_DEBUG, "FT: Deriving and pushing PMK-R1 keys to R1KHs "
1766 "for STA " MACSTR, MAC2STR(addr));
1767
1768 r1kh = wpa_auth->conf.r1kh_list;
1769 while (r1kh) {
1b484d60 1770 wpa_ft_generate_pmk_r1(wpa_auth, r0, r1kh, addr, r0->pairwise);
6fc6879b
JM		 1771 r1kh = r1kh->next;
1772 }
1773}
1774
1775#endif /* CONFIG_IEEE80211R */
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