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List.mui: Update entries count prior to range change
[AROS.git] / workbench / network / WirelessManager / src / ap / wpa_auth_ft.c
blobc9871d9a61bf999678fa27b778c51b98f39bdd30
1 /*
2 * hostapd - IEEE 802.11r - Fast BSS Transition
3 * Copyright (c) 2004-2009, Jouni Malinen <j@w1.fi>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * Alternatively, this software may be distributed under the terms of BSD
10 * license.
11 *
12 * See README and COPYING for more details.
13 */
14
15 #include "utils/includes.h"
16
17 #include "utils/common.h"
18 #include "common/ieee802_11_defs.h"
19 #include "common/ieee802_11_common.h"
20 #include "crypto/aes_wrap.h"
21 #include "ap_config.h"
22 #include "ieee802_11.h"
23 #include "wmm.h"
24 #include "wpa_auth.h"
25 #include "wpa_auth_i.h"
26 #include "wpa_auth_ie.h"
27
28
29 #ifdef CONFIG_IEEE80211R
30
31 struct 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
49 static int wpa_ft_parse_ies(const u8 *ies, size_t ies_len,
50 struct wpa_ft_ies *parse);
51
52
53 static 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 wpa_printf(MSG_DEBUG, "FT: RRB send to " MACSTR, MAC2STR(dst));
59 return wpa_auth->cb.send_ether(wpa_auth->cb.ctx, dst, ETH_P_RRB,
60 data, data_len);
61 }
62
63
64 static int wpa_ft_action_send(struct wpa_authenticator *wpa_auth,
65 const u8 *dst, const u8 *data, size_t data_len)
66 {
67 if (wpa_auth->cb.send_ft_action == NULL)
68 return -1;
69 return wpa_auth->cb.send_ft_action(wpa_auth->cb.ctx, dst,
70 data, data_len);
71 }
72
73
74 static struct wpa_state_machine *
75 wpa_ft_add_sta(struct wpa_authenticator *wpa_auth, const u8 *sta_addr)
76 {
77 if (wpa_auth->cb.add_sta == NULL)
78 return NULL;
79 return wpa_auth->cb.add_sta(wpa_auth->cb.ctx, sta_addr);
80 }
81
82
83 int wpa_write_mdie(struct wpa_auth_config *conf, u8 *buf, size_t len)
84 {
85 u8 *pos = buf;
86 u8 capab;
87 if (len < 2 + sizeof(struct rsn_mdie))
88 return -1;
89
90 *pos++ = WLAN_EID_MOBILITY_DOMAIN;
91 *pos++ = MOBILITY_DOMAIN_ID_LEN + 1;
92 os_memcpy(pos, conf->mobility_domain, MOBILITY_DOMAIN_ID_LEN);
93 pos += MOBILITY_DOMAIN_ID_LEN;
94 capab = RSN_FT_CAPAB_FT_OVER_DS;
95 *pos++ = capab;
96
97 return pos - buf;
98 }
99
100
101 int wpa_write_ftie(struct wpa_auth_config *conf, const u8 *r0kh_id,
102 size_t r0kh_id_len,
103 const u8 *anonce, const u8 *snonce,
104 u8 *buf, size_t len, const u8 *subelem,
105 size_t subelem_len)
106 {
107 u8 *pos = buf, *ielen;
108 struct rsn_ftie *hdr;
109
110 if (len < 2 + sizeof(*hdr) + 2 + FT_R1KH_ID_LEN + 2 + r0kh_id_len +
111 subelem_len)
112 return -1;
113
114 *pos++ = WLAN_EID_FAST_BSS_TRANSITION;
115 ielen = pos++;
116
117 hdr = (struct rsn_ftie *) pos;
118 os_memset(hdr, 0, sizeof(*hdr));
119 pos += sizeof(*hdr);
120 WPA_PUT_LE16(hdr->mic_control, 0);
121 if (anonce)
122 os_memcpy(hdr->anonce, anonce, WPA_NONCE_LEN);
123 if (snonce)
124 os_memcpy(hdr->snonce, snonce, WPA_NONCE_LEN);
125
126 /* Optional Parameters */
127 *pos++ = FTIE_SUBELEM_R1KH_ID;
128 *pos++ = FT_R1KH_ID_LEN;
129 os_memcpy(pos, conf->r1_key_holder, FT_R1KH_ID_LEN);
130 pos += FT_R1KH_ID_LEN;
131
132 if (r0kh_id) {
133 *pos++ = FTIE_SUBELEM_R0KH_ID;
134 *pos++ = r0kh_id_len;
135 os_memcpy(pos, r0kh_id, r0kh_id_len);
136 pos += r0kh_id_len;
137 }
138
139 if (subelem) {
140 os_memcpy(pos, subelem, subelem_len);
141 pos += subelem_len;
142 }
143
144 *ielen = pos - buf - 2;
145
146 return pos - buf;
147 }
148
149
150 struct wpa_ft_pmk_r0_sa {
151 struct wpa_ft_pmk_r0_sa *next;
152 u8 pmk_r0[PMK_LEN];
153 u8 pmk_r0_name[WPA_PMK_NAME_LEN];
154 u8 spa[ETH_ALEN];
155 int pairwise; /* Pairwise cipher suite, WPA_CIPHER_* */
156 /* TODO: expiration, identity, radius_class, EAP type, VLAN ID */
157 int pmk_r1_pushed;
158 };
159
160 struct wpa_ft_pmk_r1_sa {
161 struct wpa_ft_pmk_r1_sa *next;
162 u8 pmk_r1[PMK_LEN];
163 u8 pmk_r1_name[WPA_PMK_NAME_LEN];
164 u8 spa[ETH_ALEN];
165 int pairwise; /* Pairwise cipher suite, WPA_CIPHER_* */
166 /* TODO: expiration, identity, radius_class, EAP type, VLAN ID */
167 };
168
169 struct wpa_ft_pmk_cache {
170 struct wpa_ft_pmk_r0_sa *pmk_r0;
171 struct wpa_ft_pmk_r1_sa *pmk_r1;
172 };
173
174 struct wpa_ft_pmk_cache * wpa_ft_pmk_cache_init(void)
175 {
176 struct wpa_ft_pmk_cache *cache;
177
178 cache = os_zalloc(sizeof(*cache));
179
180 return cache;
181 }
182
183
184 void wpa_ft_pmk_cache_deinit(struct wpa_ft_pmk_cache *cache)
185 {
186 struct wpa_ft_pmk_r0_sa *r0, *r0prev;
187 struct wpa_ft_pmk_r1_sa *r1, *r1prev;
188
189 r0 = cache->pmk_r0;
190 while (r0) {
191 r0prev = r0;
192 r0 = r0->next;
193 os_memset(r0prev->pmk_r0, 0, PMK_LEN);
194 os_free(r0prev);
195 }
196
197 r1 = cache->pmk_r1;
198 while (r1) {
199 r1prev = r1;
200 r1 = r1->next;
201 os_memset(r1prev->pmk_r1, 0, PMK_LEN);
202 os_free(r1prev);
203 }
204
205 os_free(cache);
206 }
207
208
209 static int wpa_ft_store_pmk_r0(struct wpa_authenticator *wpa_auth,
210 const u8 *spa, const u8 *pmk_r0,
211 const u8 *pmk_r0_name, int pairwise)
212 {
213 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
214 struct wpa_ft_pmk_r0_sa *r0;
215
216 /* TODO: add expiration and limit on number of entries in cache */
217
218 r0 = os_zalloc(sizeof(*r0));
219 if (r0 == NULL)
220 return -1;
221
222 os_memcpy(r0->pmk_r0, pmk_r0, PMK_LEN);
223 os_memcpy(r0->pmk_r0_name, pmk_r0_name, WPA_PMK_NAME_LEN);
224 os_memcpy(r0->spa, spa, ETH_ALEN);
225 r0->pairwise = pairwise;
226
227 r0->next = cache->pmk_r0;
228 cache->pmk_r0 = r0;
229
230 return 0;
231 }
232
233
234 static int wpa_ft_fetch_pmk_r0(struct wpa_authenticator *wpa_auth,
235 const u8 *spa, const u8 *pmk_r0_name,
236 u8 *pmk_r0, int *pairwise)
237 {
238 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
239 struct wpa_ft_pmk_r0_sa *r0;
240
241 r0 = cache->pmk_r0;
242 while (r0) {
243 if (os_memcmp(r0->spa, spa, ETH_ALEN) == 0 &&
244 os_memcmp(r0->pmk_r0_name, pmk_r0_name, WPA_PMK_NAME_LEN)
245 == 0) {
246 os_memcpy(pmk_r0, r0->pmk_r0, PMK_LEN);
247 if (pairwise)
248 *pairwise = r0->pairwise;
249 return 0;
250 }
251
252 r0 = r0->next;
253 }
254
255 return -1;
256 }
257
258
259 static int wpa_ft_store_pmk_r1(struct wpa_authenticator *wpa_auth,
260 const u8 *spa, const u8 *pmk_r1,
261 const u8 *pmk_r1_name, int pairwise)
262 {
263 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
264 struct wpa_ft_pmk_r1_sa *r1;
265
266 /* TODO: add expiration and limit on number of entries in cache */
267
268 r1 = os_zalloc(sizeof(*r1));
269 if (r1 == NULL)
270 return -1;
271
272 os_memcpy(r1->pmk_r1, pmk_r1, PMK_LEN);
273 os_memcpy(r1->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN);
274 os_memcpy(r1->spa, spa, ETH_ALEN);
275 r1->pairwise = pairwise;
276
277 r1->next = cache->pmk_r1;
278 cache->pmk_r1 = r1;
279
280 return 0;
281 }
282
283
284 static int wpa_ft_fetch_pmk_r1(struct wpa_authenticator *wpa_auth,
285 const u8 *spa, const u8 *pmk_r1_name,
286 u8 *pmk_r1, int *pairwise)
287 {
288 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
289 struct wpa_ft_pmk_r1_sa *r1;
290
291 r1 = cache->pmk_r1;
292 while (r1) {
293 if (os_memcmp(r1->spa, spa, ETH_ALEN) == 0 &&
294 os_memcmp(r1->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN)
295 == 0) {
296 os_memcpy(pmk_r1, r1->pmk_r1, PMK_LEN);
297 if (pairwise)
298 *pairwise = r1->pairwise;
299 return 0;
300 }
301
302 r1 = r1->next;
303 }
304
305 return -1;
306 }
307
308
309 static int wpa_ft_pull_pmk_r1(struct wpa_authenticator *wpa_auth,
310 const u8 *s1kh_id, const u8 *r0kh_id,
311 size_t r0kh_id_len, const u8 *pmk_r0_name)
312 {
313 struct ft_remote_r0kh *r0kh;
314 struct ft_r0kh_r1kh_pull_frame frame, f;
315
316 r0kh = wpa_auth->conf.r0kh_list;
317 while (r0kh) {
318 if (r0kh->id_len == r0kh_id_len &&
319 os_memcmp(r0kh->id, r0kh_id, r0kh_id_len) == 0)
320 break;
321 r0kh = r0kh->next;
322 }
323 if (r0kh == NULL)
324 return -1;
325
326 wpa_printf(MSG_DEBUG, "FT: Send PMK-R1 pull request to remote R0KH "
327 "address " MACSTR, MAC2STR(r0kh->addr));
328
329 os_memset(&frame, 0, sizeof(frame));
330 frame.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
331 frame.packet_type = FT_PACKET_R0KH_R1KH_PULL;
332 frame.data_length = host_to_le16(FT_R0KH_R1KH_PULL_DATA_LEN);
333 os_memcpy(frame.ap_address, wpa_auth->addr, ETH_ALEN);
334
335 /* aes_wrap() does not support inplace encryption, so use a temporary
336 * buffer for the data. */
337 if (os_get_random(f.nonce, sizeof(f.nonce))) {
338 wpa_printf(MSG_DEBUG, "FT: Failed to get random data for "
339 "nonce");
340 return -1;
341 }
342 os_memcpy(f.pmk_r0_name, pmk_r0_name, WPA_PMK_NAME_LEN);
343 os_memcpy(f.r1kh_id, wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN);
344 os_memcpy(f.s1kh_id, s1kh_id, ETH_ALEN);
345
346 if (aes_wrap(r0kh->key, (FT_R0KH_R1KH_PULL_DATA_LEN + 7) / 8,
347 f.nonce, frame.nonce) < 0)
348 return -1;
349
350 wpa_ft_rrb_send(wpa_auth, r0kh->addr, (u8 *) &frame, sizeof(frame));
351
352 return 0;
353 }
354
355
356 int wpa_auth_derive_ptk_ft(struct wpa_state_machine *sm, const u8 *pmk,
357 struct wpa_ptk *ptk, size_t ptk_len)
358 {
359 u8 pmk_r0[PMK_LEN], pmk_r0_name[WPA_PMK_NAME_LEN];
360 u8 pmk_r1[PMK_LEN];
361 u8 ptk_name[WPA_PMK_NAME_LEN];
362 const u8 *mdid = sm->wpa_auth->conf.mobility_domain;
363 const u8 *r0kh = sm->wpa_auth->conf.r0_key_holder;
364 size_t r0kh_len = sm->wpa_auth->conf.r0_key_holder_len;
365 const u8 *r1kh = sm->wpa_auth->conf.r1_key_holder;
366 const u8 *ssid = sm->wpa_auth->conf.ssid;
367 size_t ssid_len = sm->wpa_auth->conf.ssid_len;
368
369
370 if (sm->xxkey_len == 0) {
371 wpa_printf(MSG_DEBUG, "FT: XXKey not available for key "
372 "derivation");
373 return -1;
374 }
375
376 wpa_derive_pmk_r0(sm->xxkey, sm->xxkey_len, ssid, ssid_len, mdid,
377 r0kh, r0kh_len, sm->addr, pmk_r0, pmk_r0_name);
378 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R0", pmk_r0, PMK_LEN);
379 wpa_hexdump(MSG_DEBUG, "FT: PMKR0Name", pmk_r0_name, WPA_PMK_NAME_LEN);
380 wpa_ft_store_pmk_r0(sm->wpa_auth, sm->addr, pmk_r0, pmk_r0_name,
381 sm->pairwise);
382
383 wpa_derive_pmk_r1(pmk_r0, pmk_r0_name, r1kh, sm->addr,
384 pmk_r1, sm->pmk_r1_name);
385 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", pmk_r1, PMK_LEN);
386 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", sm->pmk_r1_name,
387 WPA_PMK_NAME_LEN);
388 wpa_ft_store_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1, sm->pmk_r1_name,
389 sm->pairwise);
390
391 wpa_pmk_r1_to_ptk(pmk_r1, sm->SNonce, sm->ANonce, sm->addr,
392 sm->wpa_auth->addr, sm->pmk_r1_name,
393 (u8 *) ptk, ptk_len, ptk_name);
394 wpa_hexdump_key(MSG_DEBUG, "FT: PTK", (u8 *) ptk, ptk_len);
395 wpa_hexdump(MSG_DEBUG, "FT: PTKName", ptk_name, WPA_PMK_NAME_LEN);
396
397 return 0;
398 }
399
400
401 static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
402 const u8 *addr, int idx, u8 *seq)
403 {
404 if (wpa_auth->cb.get_seqnum == NULL)
405 return -1;
406 return wpa_auth->cb.get_seqnum(wpa_auth->cb.ctx, addr, idx, seq);
407 }
408
409
410 static u8 * wpa_ft_gtk_subelem(struct wpa_state_machine *sm, size_t *len)
411 {
412 u8 *subelem;
413 struct wpa_group *gsm = sm->group;
414 size_t subelem_len, pad_len;
415 const u8 *key;
416 size_t key_len;
417 u8 keybuf[32];
418
419 key_len = gsm->GTK_len;
420 if (key_len > sizeof(keybuf))
421 return NULL;
422
423 /*
424 * Pad key for AES Key Wrap if it is not multiple of 8 bytes or is less
425 * than 16 bytes.
426 */
427 pad_len = key_len % 8;
428 if (pad_len)
429 pad_len = 8 - pad_len;
430 if (key_len + pad_len < 16)
431 pad_len += 8;
432 if (pad_len) {
433 os_memcpy(keybuf, gsm->GTK[gsm->GN - 1], key_len);
434 os_memset(keybuf + key_len, 0, pad_len);
435 keybuf[key_len] = 0xdd;
436 key_len += pad_len;
437 key = keybuf;
438 } else
439 key = gsm->GTK[gsm->GN - 1];
440
441 /*
442 * Sub-elem ID[1] | Length[1] | Key Info[2] | Key Length[1] | RSC[8] |
443 * Key[5..32].
444 */
445 subelem_len = 13 + key_len + 8;
446 subelem = os_zalloc(subelem_len);
447 if (subelem == NULL)
448 return NULL;
449
450 subelem[0] = FTIE_SUBELEM_GTK;
451 subelem[1] = 11 + key_len + 8;
452 /* Key ID in B0-B1 of Key Info */
453 WPA_PUT_LE16(&subelem[2], gsm->GN & 0x03);
454 subelem[4] = gsm->GTK_len;
455 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, subelem + 5);
456 if (aes_wrap(sm->PTK.kek, key_len / 8, key, subelem + 13)) {
457 os_free(subelem);
458 return NULL;
459 }
460
461 *len = subelem_len;
462 return subelem;
463 }
464
465
466 #ifdef CONFIG_IEEE80211W
467 static u8 * wpa_ft_igtk_subelem(struct wpa_state_machine *sm, size_t *len)
468 {
469 u8 *subelem, *pos;
470 struct wpa_group *gsm = sm->group;
471 size_t subelem_len;
472
473 /* Sub-elem ID[1] | Length[1] | KeyID[2] | IPN[6] | Key Length[1] |
474 * Key[16+8] */
475 subelem_len = 1 + 1 + 2 + 6 + 1 + WPA_IGTK_LEN + 8;
476 subelem = os_zalloc(subelem_len);
477 if (subelem == NULL)
478 return NULL;
479
480 pos = subelem;
481 *pos++ = FTIE_SUBELEM_IGTK;
482 *pos++ = subelem_len - 2;
483 WPA_PUT_LE16(pos, gsm->GN_igtk);
484 pos += 2;
485 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos);
486 pos += 6;
487 *pos++ = WPA_IGTK_LEN;
488 if (aes_wrap(sm->PTK.kek, WPA_IGTK_LEN / 8,
489 gsm->IGTK[gsm->GN_igtk - 4], pos)) {
490 os_free(subelem);
491 return NULL;
492 }
493
494 *len = subelem_len;
495 return subelem;
496 }
497 #endif /* CONFIG_IEEE80211W */
498
499
500 static u8 * wpa_ft_process_rdie(u8 *pos, u8 *end, u8 id, u8 descr_count,
501 const u8 *ies, size_t ies_len)
502 {
503 struct ieee802_11_elems parse;
504 struct rsn_rdie *rdie;
505
506 wpa_printf(MSG_DEBUG, "FT: Resource Request: id=%d descr_count=%d",
507 id, descr_count);
508 wpa_hexdump(MSG_MSGDUMP, "FT: Resource descriptor IE(s)",
509 ies, ies_len);
510
511 if (end - pos < (int) sizeof(*rdie)) {
512 wpa_printf(MSG_ERROR, "FT: Not enough room for response RDIE");
513 return pos;
514 }
515
516 *pos++ = WLAN_EID_RIC_DATA;
517 *pos++ = sizeof(*rdie);
518 rdie = (struct rsn_rdie *) pos;
519 rdie->id = id;
520 rdie->descr_count = 0;
521 rdie->status_code = host_to_le16(WLAN_STATUS_SUCCESS);
522 pos += sizeof(*rdie);
523
524 if (ieee802_11_parse_elems((u8 *) ies, ies_len, &parse, 1) ==
525 ParseFailed) {
526 wpa_printf(MSG_DEBUG, "FT: Failed to parse request IEs");
527 rdie->status_code =
528 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
529 return pos;
530 }
531
532 #ifdef NEED_AP_MLME
533 if (parse.wmm_tspec) {
534 struct wmm_tspec_element *tspec;
535 int res;
536
537 if (parse.wmm_tspec_len + 2 < (int) sizeof(*tspec)) {
538 wpa_printf(MSG_DEBUG, "FT: Too short WMM TSPEC IE "
539 "(%d)", (int) parse.wmm_tspec_len);
540 rdie->status_code =
541 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
542 return pos;
543 }
544 if (end - pos < (int) sizeof(*tspec)) {
545 wpa_printf(MSG_ERROR, "FT: Not enough room for "
546 "response TSPEC");
547 rdie->status_code =
548 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
549 return pos;
550 }
551 tspec = (struct wmm_tspec_element *) pos;
552 os_memcpy(tspec, parse.wmm_tspec - 2, sizeof(*tspec));
553 res = wmm_process_tspec(tspec);
554 wpa_printf(MSG_DEBUG, "FT: ADDTS processing result: %d", res);
555 if (res == WMM_ADDTS_STATUS_INVALID_PARAMETERS)
556 rdie->status_code =
557 host_to_le16(WLAN_STATUS_INVALID_PARAMETERS);
558 else if (res == WMM_ADDTS_STATUS_REFUSED)
559 rdie->status_code =
560 host_to_le16(WLAN_STATUS_REQUEST_DECLINED);
561 else {
562 /* TSPEC accepted; include updated TSPEC in response */
563 rdie->descr_count = 1;
564 pos += sizeof(*tspec);
565 }
566 return pos;
567 }
568 #endif /* NEED_AP_MLME */
569
570 wpa_printf(MSG_DEBUG, "FT: No supported resource requested");
571 rdie->status_code = host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
572 return pos;
573 }
574
575
576 static u8 * wpa_ft_process_ric(u8 *pos, u8 *end, const u8 *ric, size_t ric_len)
577 {
578 const u8 *rpos, *start;
579 const struct rsn_rdie *rdie;
580
581 wpa_hexdump(MSG_MSGDUMP, "FT: RIC Request", ric, ric_len);
582
583 rpos = ric;
584 while (rpos + sizeof(*rdie) < ric + ric_len) {
585 if (rpos[0] != WLAN_EID_RIC_DATA || rpos[1] < sizeof(*rdie) ||
586 rpos + 2 + rpos[1] > ric + ric_len)
587 break;
588 rdie = (const struct rsn_rdie *) (rpos + 2);
589 rpos += 2 + rpos[1];
590 start = rpos;
591
592 while (rpos + 2 <= ric + ric_len &&
593 rpos + 2 + rpos[1] <= ric + ric_len) {
594 if (rpos[0] == WLAN_EID_RIC_DATA)
595 break;
596 rpos += 2 + rpos[1];
597 }
598 pos = wpa_ft_process_rdie(pos, end, rdie->id,
599 rdie->descr_count,
600 start, rpos - start);
601 }
602
603 return pos;
604 }
605
606
607 u8 * wpa_sm_write_assoc_resp_ies(struct wpa_state_machine *sm, u8 *pos,
608 size_t max_len, int auth_alg,
609 const u8 *req_ies, size_t req_ies_len)
610 {
611 u8 *end, *mdie, *ftie, *rsnie = NULL, *r0kh_id, *subelem = NULL;
612 size_t mdie_len, ftie_len, rsnie_len = 0, r0kh_id_len, subelem_len = 0;
613 int res;
614 struct wpa_auth_config *conf;
615 struct rsn_ftie *_ftie;
616 struct wpa_ft_ies parse;
617 u8 *ric_start;
618 u8 *anonce, *snonce;
619
620 if (sm == NULL)
621 return pos;
622
623 conf = &sm->wpa_auth->conf;
624
625 if (sm->wpa_key_mgmt != WPA_KEY_MGMT_FT_IEEE8021X &&
626 sm->wpa_key_mgmt != WPA_KEY_MGMT_FT_PSK)
627 return pos;
628
629 end = pos + max_len;
630
631 if (auth_alg == WLAN_AUTH_FT) {
632 /*
633 * RSN (only present if this is a Reassociation Response and
634 * part of a fast BSS transition)
635 */
636 res = wpa_write_rsn_ie(conf, pos, end - pos, sm->pmk_r1_name);
637 if (res < 0)
638 return pos;
639 rsnie = pos;
640 rsnie_len = res;
641 pos += res;
642 }
643
644 /* Mobility Domain Information */
645 res = wpa_write_mdie(conf, pos, end - pos);
646 if (res < 0)
647 return pos;
648 mdie = pos;
649 mdie_len = res;
650 pos += res;
651
652 /* Fast BSS Transition Information */
653 if (auth_alg == WLAN_AUTH_FT) {
654 subelem = wpa_ft_gtk_subelem(sm, &subelem_len);
655 r0kh_id = sm->r0kh_id;
656 r0kh_id_len = sm->r0kh_id_len;
657 anonce = sm->ANonce;
658 snonce = sm->SNonce;
659 #ifdef CONFIG_IEEE80211W
660 if (sm->mgmt_frame_prot) {
661 u8 *igtk;
662 size_t igtk_len;
663 u8 *nbuf;
664 igtk = wpa_ft_igtk_subelem(sm, &igtk_len);
665 if (igtk == NULL) {
666 os_free(subelem);
667 return pos;
668 }
669 nbuf = os_realloc(subelem, subelem_len + igtk_len);
670 if (nbuf == NULL) {
671 os_free(subelem);
672 os_free(igtk);
673 return pos;
674 }
675 subelem = nbuf;
676 os_memcpy(subelem + subelem_len, igtk, igtk_len);
677 subelem_len += igtk_len;
678 os_free(igtk);
679 }
680 #endif /* CONFIG_IEEE80211W */
681 } else {
682 r0kh_id = conf->r0_key_holder;
683 r0kh_id_len = conf->r0_key_holder_len;
684 anonce = NULL;
685 snonce = NULL;
686 }
687 res = wpa_write_ftie(conf, r0kh_id, r0kh_id_len, anonce, snonce, pos,
688 end - pos, subelem, subelem_len);
689 os_free(subelem);
690 if (res < 0)
691 return pos;
692 ftie = pos;
693 ftie_len = res;
694 pos += res;
695
696 os_free(sm->assoc_resp_ftie);
697 sm->assoc_resp_ftie = os_malloc(ftie_len);
698 if (sm->assoc_resp_ftie)
699 os_memcpy(sm->assoc_resp_ftie, ftie, ftie_len);
700
701 _ftie = (struct rsn_ftie *) (ftie + 2);
702 if (auth_alg == WLAN_AUTH_FT)
703 _ftie->mic_control[1] = 3; /* Information element count */
704
705 ric_start = pos;
706 if (wpa_ft_parse_ies(req_ies, req_ies_len, &parse) == 0 && parse.ric) {
707 pos = wpa_ft_process_ric(pos, end, parse.ric, parse.ric_len);
708 if (auth_alg == WLAN_AUTH_FT)
709 _ftie->mic_control[1] +=
710 ieee802_11_ie_count(ric_start,
711 pos - ric_start);
712 }
713 if (ric_start == pos)
714 ric_start = NULL;
715
716 if (auth_alg == WLAN_AUTH_FT &&
717 wpa_ft_mic(sm->PTK.kck, sm->addr, sm->wpa_auth->addr, 6,
718 mdie, mdie_len, ftie, ftie_len,
719 rsnie, rsnie_len,
720 ric_start, ric_start ? pos - ric_start : 0,
721 _ftie->mic) < 0)
722 wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC");
723
724 return pos;
725 }
726
727
728 static int wpa_ft_parse_ftie(const u8 *ie, size_t ie_len,
729 struct wpa_ft_ies *parse)
730 {
731 const u8 *end, *pos;
732
733 parse->ftie = ie;
734 parse->ftie_len = ie_len;
735
736 pos = ie + sizeof(struct rsn_ftie);
737 end = ie + ie_len;
738
739 while (pos + 2 <= end && pos + 2 + pos[1] <= end) {
740 switch (pos[0]) {
741 case FTIE_SUBELEM_R1KH_ID:
742 if (pos[1] != FT_R1KH_ID_LEN) {
743 wpa_printf(MSG_DEBUG, "FT: Invalid R1KH-ID "
744 "length in FTIE: %d", pos[1]);
745 return -1;
746 }
747 parse->r1kh_id = pos + 2;
748 break;
749 case FTIE_SUBELEM_GTK:
750 parse->gtk = pos + 2;
751 parse->gtk_len = pos[1];
752 break;
753 case FTIE_SUBELEM_R0KH_ID:
754 if (pos[1] < 1 || pos[1] > FT_R0KH_ID_MAX_LEN) {
755 wpa_printf(MSG_DEBUG, "FT: Invalid R0KH-ID "
756 "length in FTIE: %d", pos[1]);
757 return -1;
758 }
759 parse->r0kh_id = pos + 2;
760 parse->r0kh_id_len = pos[1];
761 break;
762 }
763
764 pos += 2 + pos[1];
765 }
766
767 return 0;
768 }
769
770
771 static int wpa_ft_parse_ies(const u8 *ies, size_t ies_len,
772 struct wpa_ft_ies *parse)
773 {
774 const u8 *end, *pos;
775 struct wpa_ie_data data;
776 int ret;
777 const struct rsn_ftie *ftie;
778 int prot_ie_count = 0;
779
780 os_memset(parse, 0, sizeof(*parse));
781 if (ies == NULL)
782 return 0;
783
784 pos = ies;
785 end = ies + ies_len;
786 while (pos + 2 <= end && pos + 2 + pos[1] <= end) {
787 switch (pos[0]) {
788 case WLAN_EID_RSN:
789 parse->rsn = pos + 2;
790 parse->rsn_len = pos[1];
791 ret = wpa_parse_wpa_ie_rsn(parse->rsn - 2,
792 parse->rsn_len + 2,
793 &data);
794 if (ret < 0) {
795 wpa_printf(MSG_DEBUG, "FT: Failed to parse "
796 "RSN IE: %d", ret);
797 return -1;
798 }
799 if (data.num_pmkid == 1 && data.pmkid)
800 parse->rsn_pmkid = data.pmkid;
801 break;
802 case WLAN_EID_MOBILITY_DOMAIN:
803 parse->mdie = pos + 2;
804 parse->mdie_len = pos[1];
805 break;
806 case WLAN_EID_FAST_BSS_TRANSITION:
807 if (pos[1] < sizeof(*ftie))
808 return -1;
809 ftie = (const struct rsn_ftie *) (pos + 2);
810 prot_ie_count = ftie->mic_control[1];
811 if (wpa_ft_parse_ftie(pos + 2, pos[1], parse) < 0)
812 return -1;
813 break;
814 case WLAN_EID_RIC_DATA:
815 if (parse->ric == NULL)
816 parse->ric = pos;
817 }
818
819 pos += 2 + pos[1];
820 }
821
822 if (prot_ie_count == 0)
823 return 0; /* no MIC */
824
825 /*
826 * Check that the protected IE count matches with IEs included in the
827 * frame.
828 */
829 if (parse->rsn)
830 prot_ie_count--;
831 if (parse->mdie)
832 prot_ie_count--;
833 if (parse->ftie)
834 prot_ie_count--;
835 if (prot_ie_count < 0) {
836 wpa_printf(MSG_DEBUG, "FT: Some required IEs not included in "
837 "the protected IE count");
838 return -1;
839 }
840
841 if (prot_ie_count == 0 && parse->ric) {
842 wpa_printf(MSG_DEBUG, "FT: RIC IE(s) in the frame, but not "
843 "included in protected IE count");
844 return -1;
845 }
846
847 /* Determine the end of the RIC IE(s) */
848 pos = parse->ric;
849 while (pos && pos + 2 <= end && pos + 2 + pos[1] <= end &&
850 prot_ie_count) {
851 prot_ie_count--;
852 pos += 2 + pos[1];
853 }
854 parse->ric_len = pos - parse->ric;
855 if (prot_ie_count) {
856 wpa_printf(MSG_DEBUG, "FT: %d protected IEs missing from "
857 "frame", (int) prot_ie_count);
858 return -1;
859 }
860
861 return 0;
862 }
863
864
865 static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
866 int vlan_id,
867 enum wpa_alg alg, const u8 *addr, int idx,
868 u8 *key, size_t key_len)
869 {
870 if (wpa_auth->cb.set_key == NULL)
871 return -1;
872 return wpa_auth->cb.set_key(wpa_auth->cb.ctx, vlan_id, alg, addr, idx,
873 key, key_len);
874 }
875
876
877 void wpa_ft_install_ptk(struct wpa_state_machine *sm)
878 {
879 enum wpa_alg alg;
880 int klen;
881
882 /* MLME-SETKEYS.request(PTK) */
883 if (sm->pairwise == WPA_CIPHER_TKIP) {
884 alg = WPA_ALG_TKIP;
885 klen = 32;
886 } else if (sm->pairwise == WPA_CIPHER_CCMP) {
887 alg = WPA_ALG_CCMP;
888 klen = 16;
889 } else {
890 wpa_printf(MSG_DEBUG, "FT: Unknown pairwise alg 0x%x - skip "
891 "PTK configuration", sm->pairwise);
892 return;
893 }
894
895 /* FIX: add STA entry to kernel/driver here? The set_key will fail
896 * most likely without this.. At the moment, STA entry is added only
897 * after association has been completed. This function will be called
898 * again after association to get the PTK configured, but that could be
899 * optimized by adding the STA entry earlier.
900 */
901 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
902 sm->PTK.tk1, klen))
903 return;
904
905 /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
906 sm->pairwise_set = TRUE;
907 }
908
909
910 static u16 wpa_ft_process_auth_req(struct wpa_state_machine *sm,
911 const u8 *ies, size_t ies_len,
912 u8 **resp_ies, size_t *resp_ies_len)
913 {
914 struct rsn_mdie *mdie;
915 struct rsn_ftie *ftie;
916 u8 pmk_r1[PMK_LEN], pmk_r1_name[WPA_PMK_NAME_LEN];
917 u8 ptk_name[WPA_PMK_NAME_LEN];
918 struct wpa_auth_config *conf;
919 struct wpa_ft_ies parse;
920 size_t buflen, ptk_len;
921 int ret;
922 u8 *pos, *end;
923 int pairwise;
924
925 *resp_ies = NULL;
926 *resp_ies_len = 0;
927
928 sm->pmk_r1_name_valid = 0;
929 conf = &sm->wpa_auth->conf;
930
931 wpa_hexdump(MSG_DEBUG, "FT: Received authentication frame IEs",
932 ies, ies_len);
933
934 if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) {
935 wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs");
936 return WLAN_STATUS_UNSPECIFIED_FAILURE;
937 }
938
939 mdie = (struct rsn_mdie *) parse.mdie;
940 if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
941 os_memcmp(mdie->mobility_domain,
942 sm->wpa_auth->conf.mobility_domain,
943 MOBILITY_DOMAIN_ID_LEN) != 0) {
944 wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
945 return WLAN_STATUS_INVALID_MDIE;
946 }
947
948 ftie = (struct rsn_ftie *) parse.ftie;
949 if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
950 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
951 return WLAN_STATUS_INVALID_FTIE;
952 }
953
954 os_memcpy(sm->SNonce, ftie->snonce, WPA_NONCE_LEN);
955
956 if (parse.r0kh_id == NULL) {
957 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE - no R0KH-ID");
958 return WLAN_STATUS_INVALID_FTIE;
959 }
960
961 wpa_hexdump(MSG_DEBUG, "FT: STA R0KH-ID",
962 parse.r0kh_id, parse.r0kh_id_len);
963 os_memcpy(sm->r0kh_id, parse.r0kh_id, parse.r0kh_id_len);
964 sm->r0kh_id_len = parse.r0kh_id_len;
965
966 if (parse.rsn_pmkid == NULL) {
967 wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE");
968 return WLAN_STATUS_INVALID_PMKID;
969 }
970
971 wpa_hexdump(MSG_DEBUG, "FT: Requested PMKR0Name",
972 parse.rsn_pmkid, WPA_PMK_NAME_LEN);
973 wpa_derive_pmk_r1_name(parse.rsn_pmkid,
974 sm->wpa_auth->conf.r1_key_holder, sm->addr,
975 pmk_r1_name);
976 wpa_hexdump(MSG_DEBUG, "FT: Derived requested PMKR1Name",
977 pmk_r1_name, WPA_PMK_NAME_LEN);
978
979 if (wpa_ft_fetch_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1_name, pmk_r1,
980 &pairwise) < 0) {
981 if (wpa_ft_pull_pmk_r1(sm->wpa_auth, sm->addr, sm->r0kh_id,
982 sm->r0kh_id_len, parse.rsn_pmkid) < 0) {
983 wpa_printf(MSG_DEBUG, "FT: Did not have matching "
984 "PMK-R1 and unknown R0KH-ID");
985 return WLAN_STATUS_INVALID_PMKID;
986 }
987
988 /*
989 * TODO: Should return "status pending" (and the caller should
990 * not send out response now). The real response will be sent
991 * once the response from R0KH is received.
992 */
993 return WLAN_STATUS_INVALID_PMKID;
994 }
995
996 wpa_hexdump_key(MSG_DEBUG, "FT: Selected PMK-R1", pmk_r1, PMK_LEN);
997 sm->pmk_r1_name_valid = 1;
998 os_memcpy(sm->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN);
999
1000 if (os_get_random(sm->ANonce, WPA_NONCE_LEN)) {
1001 wpa_printf(MSG_DEBUG, "FT: Failed to get random data for "
1002 "ANonce");
1003 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1004 }
1005
1006 wpa_hexdump(MSG_DEBUG, "FT: Received SNonce",
1007 sm->SNonce, WPA_NONCE_LEN);
1008 wpa_hexdump(MSG_DEBUG, "FT: Generated ANonce",
1009 sm->ANonce, WPA_NONCE_LEN);
1010
1011 ptk_len = pairwise != WPA_CIPHER_CCMP ? 64 : 48;
1012 wpa_pmk_r1_to_ptk(pmk_r1, sm->SNonce, sm->ANonce, sm->addr,
1013 sm->wpa_auth->addr, pmk_r1_name,
1014 (u8 *) &sm->PTK, ptk_len, ptk_name);
1015 wpa_hexdump_key(MSG_DEBUG, "FT: PTK",
1016 (u8 *) &sm->PTK, ptk_len);
1017 wpa_hexdump(MSG_DEBUG, "FT: PTKName", ptk_name, WPA_PMK_NAME_LEN);
1018
1019 sm->pairwise = pairwise;
1020 wpa_ft_install_ptk(sm);
1021
1022 buflen = 2 + sizeof(struct rsn_mdie) + 2 + sizeof(struct rsn_ftie) +
1023 2 + FT_R1KH_ID_LEN + 200;
1024 *resp_ies = os_zalloc(buflen);
1025 if (*resp_ies == NULL) {
1026 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1027 }
1028
1029 pos = *resp_ies;
1030 end = *resp_ies + buflen;
1031
1032 ret = wpa_write_rsn_ie(conf, pos, end - pos, parse.rsn_pmkid);
1033 if (ret < 0) {
1034 os_free(*resp_ies);
1035 *resp_ies = NULL;
1036 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1037 }
1038 pos += ret;
1039
1040 ret = wpa_write_mdie(conf, pos, end - pos);
1041 if (ret < 0) {
1042 os_free(*resp_ies);
1043 *resp_ies = NULL;
1044 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1045 }
1046 pos += ret;
1047
1048 ret = wpa_write_ftie(conf, parse.r0kh_id, parse.r0kh_id_len,
1049 sm->ANonce, sm->SNonce, pos, end - pos, NULL, 0);
1050 if (ret < 0) {
1051 os_free(*resp_ies);
1052 *resp_ies = NULL;
1053 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1054 }
1055 pos += ret;
1056
1057 *resp_ies_len = pos - *resp_ies;
1058
1059 return WLAN_STATUS_SUCCESS;
1060 }
1061
1062
1063 void wpa_ft_process_auth(struct wpa_state_machine *sm, const u8 *bssid,
1064 u16 auth_transaction, const u8 *ies, size_t ies_len,
1065 void (*cb)(void *ctx, const u8 *dst, const u8 *bssid,
1066 u16 auth_transaction, u16 status,
1067 const u8 *ies, size_t ies_len),
1068 void *ctx)
1069 {
1070 u16 status;
1071 u8 *resp_ies;
1072 size_t resp_ies_len;
1073
1074 if (sm == NULL) {
1075 wpa_printf(MSG_DEBUG, "FT: Received authentication frame, but "
1076 "WPA SM not available");
1077 return;
1078 }
1079
1080 wpa_printf(MSG_DEBUG, "FT: Received authentication frame: STA=" MACSTR
1081 " BSSID=" MACSTR " transaction=%d",
1082 MAC2STR(sm->addr), MAC2STR(bssid), auth_transaction);
1083 status = wpa_ft_process_auth_req(sm, ies, ies_len, &resp_ies,
1084 &resp_ies_len);
1085
1086 wpa_printf(MSG_DEBUG, "FT: FT authentication response: dst=" MACSTR
1087 " auth_transaction=%d status=%d",
1088 MAC2STR(sm->addr), auth_transaction + 1, status);
1089 wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len);
1090 cb(ctx, sm->addr, bssid, auth_transaction + 1, status,
1091 resp_ies, resp_ies_len);
1092 os_free(resp_ies);
1093 }
1094
1095
1096 u16 wpa_ft_validate_reassoc(struct wpa_state_machine *sm, const u8 *ies,
1097 size_t ies_len)
1098 {
1099 struct wpa_ft_ies parse;
1100 struct rsn_mdie *mdie;
1101 struct rsn_ftie *ftie;
1102 u8 mic[16];
1103 unsigned int count;
1104
1105 if (sm == NULL)
1106 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1107
1108 wpa_hexdump(MSG_DEBUG, "FT: Reassoc Req IEs", ies, ies_len);
1109
1110 if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) {
1111 wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs");
1112 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1113 }
1114
1115 if (parse.rsn == NULL) {
1116 wpa_printf(MSG_DEBUG, "FT: No RSNIE in Reassoc Req");
1117 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1118 }
1119
1120 if (parse.rsn_pmkid == NULL) {
1121 wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE");
1122 return WLAN_STATUS_INVALID_PMKID;
1123 }
1124
1125 if (os_memcmp(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN) != 0)
1126 {
1127 wpa_printf(MSG_DEBUG, "FT: PMKID in Reassoc Req did not match "
1128 "with the PMKR1Name derived from auth request");
1129 return WLAN_STATUS_INVALID_PMKID;
1130 }
1131
1132 mdie = (struct rsn_mdie *) parse.mdie;
1133 if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
1134 os_memcmp(mdie->mobility_domain,
1135 sm->wpa_auth->conf.mobility_domain,
1136 MOBILITY_DOMAIN_ID_LEN) != 0) {
1137 wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
1138 return WLAN_STATUS_INVALID_MDIE;
1139 }
1140
1141 ftie = (struct rsn_ftie *) parse.ftie;
1142 if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
1143 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
1144 return WLAN_STATUS_INVALID_FTIE;
1145 }
1146
1147 if (os_memcmp(ftie->snonce, sm->SNonce, WPA_NONCE_LEN) != 0) {
1148 wpa_printf(MSG_DEBUG, "FT: SNonce mismatch in FTIE");
1149 wpa_hexdump(MSG_DEBUG, "FT: Received SNonce",
1150 ftie->snonce, WPA_NONCE_LEN);
1151 wpa_hexdump(MSG_DEBUG, "FT: Expected SNonce",
1152 sm->SNonce, WPA_NONCE_LEN);
1153 return -1;
1154 }
1155
1156 if (os_memcmp(ftie->anonce, sm->ANonce, WPA_NONCE_LEN) != 0) {
1157 wpa_printf(MSG_DEBUG, "FT: ANonce mismatch in FTIE");
1158 wpa_hexdump(MSG_DEBUG, "FT: Received ANonce",
1159 ftie->anonce, WPA_NONCE_LEN);
1160 wpa_hexdump(MSG_DEBUG, "FT: Expected ANonce",
1161 sm->ANonce, WPA_NONCE_LEN);
1162 return -1;
1163 }
1164
1165
1166 if (parse.r0kh_id == NULL) {
1167 wpa_printf(MSG_DEBUG, "FT: No R0KH-ID subelem in FTIE");
1168 return -1;
1169 }
1170
1171 if (parse.r0kh_id_len != sm->r0kh_id_len ||
1172 os_memcmp(parse.r0kh_id, sm->r0kh_id, parse.r0kh_id_len) != 0) {
1173 wpa_printf(MSG_DEBUG, "FT: R0KH-ID in FTIE did not match with "
1174 "the current R0KH-ID");
1175 wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID in FTIE",
1176 parse.r0kh_id, parse.r0kh_id_len);
1177 wpa_hexdump(MSG_DEBUG, "FT: The current R0KH-ID",
1178 sm->r0kh_id, sm->r0kh_id_len);
1179 return -1;
1180 }
1181
1182 if (parse.r1kh_id == NULL) {
1183 wpa_printf(MSG_DEBUG, "FT: No R1KH-ID subelem in FTIE");
1184 return -1;
1185 }
1186
1187 if (os_memcmp(parse.r1kh_id, sm->wpa_auth->conf.r1_key_holder,
1188 FT_R1KH_ID_LEN) != 0) {
1189 wpa_printf(MSG_DEBUG, "FT: Unknown R1KH-ID used in "
1190 "ReassocReq");
1191 wpa_hexdump(MSG_DEBUG, "FT: R1KH-ID in FTIE",
1192 parse.r1kh_id, FT_R1KH_ID_LEN);
1193 wpa_hexdump(MSG_DEBUG, "FT: Expected R1KH-ID",
1194 sm->wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN);
1195 return -1;
1196 }
1197
1198 if (parse.rsn_pmkid == NULL ||
1199 os_memcmp(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN)) {
1200 wpa_printf(MSG_DEBUG, "FT: No matching PMKR1Name (PMKID) in "
1201 "RSNIE (pmkid=%d)", !!parse.rsn_pmkid);
1202 return -1;
1203 }
1204
1205 count = 3;
1206 if (parse.ric)
1207 count++;
1208 if (ftie->mic_control[1] != count) {
1209 wpa_printf(MSG_DEBUG, "FT: Unexpected IE count in MIC "
1210 "Control: received %u expected %u",
1211 ftie->mic_control[1], count);
1212 return -1;
1213 }
1214
1215 if (wpa_ft_mic(sm->PTK.kck, sm->addr, sm->wpa_auth->addr, 5,
1216 parse.mdie - 2, parse.mdie_len + 2,
1217 parse.ftie - 2, parse.ftie_len + 2,
1218 parse.rsn - 2, parse.rsn_len + 2,
1219 parse.ric, parse.ric_len,
1220 mic) < 0) {
1221 wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC");
1222 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1223 }
1224
1225 if (os_memcmp(mic, ftie->mic, 16) != 0) {
1226 wpa_printf(MSG_DEBUG, "FT: Invalid MIC in FTIE");
1227 wpa_hexdump(MSG_MSGDUMP, "FT: Received MIC", ftie->mic, 16);
1228 wpa_hexdump(MSG_MSGDUMP, "FT: Calculated MIC", mic, 16);
1229 return WLAN_STATUS_INVALID_FTIE;
1230 }
1231
1232 return WLAN_STATUS_SUCCESS;
1233 }
1234
1235
1236 int wpa_ft_action_rx(struct wpa_state_machine *sm, const u8 *data, size_t len)
1237 {
1238 const u8 *sta_addr, *target_ap;
1239 const u8 *ies;
1240 size_t ies_len;
1241 u8 action;
1242 struct ft_rrb_frame *frame;
1243
1244 if (sm == NULL)
1245 return -1;
1246
1247 /*
1248 * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6]
1249 * FT Request action frame body[variable]
1250 */
1251
1252 if (len < 14) {
1253 wpa_printf(MSG_DEBUG, "FT: Too short FT Action frame "
1254 "(len=%lu)", (unsigned long) len);
1255 return -1;
1256 }
1257
1258 action = data[1];
1259 sta_addr = data + 2;
1260 target_ap = data + 8;
1261 ies = data + 14;
1262 ies_len = len - 14;
1263
1264 wpa_printf(MSG_DEBUG, "FT: Received FT Action frame (STA=" MACSTR
1265 " Target AP=" MACSTR " Action=%d)",
1266 MAC2STR(sta_addr), MAC2STR(target_ap), action);
1267
1268 if (os_memcmp(sta_addr, sm->addr, ETH_ALEN) != 0) {
1269 wpa_printf(MSG_DEBUG, "FT: Mismatch in FT Action STA address: "
1270 "STA=" MACSTR " STA-Address=" MACSTR,
1271 MAC2STR(sm->addr), MAC2STR(sta_addr));
1272 return -1;
1273 }
1274
1275 /*
1276 * Do some sanity checking on the target AP address (not own and not
1277 * broadcast. This could be extended to filter based on a list of known
1278 * APs in the MD (if such a list were configured).
1279 */
1280 if ((target_ap[0] & 0x01) ||
1281 os_memcmp(target_ap, sm->wpa_auth->addr, ETH_ALEN) == 0) {
1282 wpa_printf(MSG_DEBUG, "FT: Invalid Target AP in FT Action "
1283 "frame");
1284 return -1;
1285 }
1286
1287 wpa_hexdump(MSG_MSGDUMP, "FT: Action frame body", ies, ies_len);
1288
1289 /* RRB - Forward action frame to the target AP */
1290 frame = os_malloc(sizeof(*frame) + len);
1291 frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1292 frame->packet_type = FT_PACKET_REQUEST;
1293 frame->action_length = host_to_le16(len);
1294 os_memcpy(frame->ap_address, sm->wpa_auth->addr, ETH_ALEN);
1295 os_memcpy(frame + 1, data, len);
1296
1297 wpa_ft_rrb_send(sm->wpa_auth, target_ap, (u8 *) frame,
1298 sizeof(*frame) + len);
1299 os_free(frame);
1300
1301 return 0;
1302 }
1303
1304
1305 static int wpa_ft_rrb_rx_request(struct wpa_authenticator *wpa_auth,
1306 const u8 *current_ap, const u8 *sta_addr,
1307 const u8 *body, size_t len)
1308 {
1309 struct wpa_state_machine *sm;
1310 u16 status;
1311 u8 *resp_ies, *pos;
1312 size_t resp_ies_len, rlen;
1313 struct ft_rrb_frame *frame;
1314
1315 sm = wpa_ft_add_sta(wpa_auth, sta_addr);
1316 if (sm == NULL) {
1317 wpa_printf(MSG_DEBUG, "FT: Failed to add new STA based on "
1318 "RRB Request");
1319 return -1;
1320 }
1321
1322 wpa_hexdump(MSG_MSGDUMP, "FT: RRB Request Frame body", body, len);
1323
1324 status = wpa_ft_process_auth_req(sm, body, len, &resp_ies,
1325 &resp_ies_len);
1326
1327 wpa_printf(MSG_DEBUG, "FT: RRB authentication response: STA=" MACSTR
1328 " CurrentAP=" MACSTR " status=%d",
1329 MAC2STR(sm->addr), MAC2STR(current_ap), status);
1330 wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len);
1331
1332 /* RRB - Forward action frame response to the Current AP */
1333
1334 /*
1335 * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6]
1336 * Status_Code[2] FT Request action frame body[variable]
1337 */
1338 rlen = 2 + 2 * ETH_ALEN + 2 + resp_ies_len;
1339
1340 frame = os_malloc(sizeof(*frame) + rlen);
1341 frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1342 frame->packet_type = FT_PACKET_RESPONSE;
1343 frame->action_length = host_to_le16(rlen);
1344 os_memcpy(frame->ap_address, wpa_auth->addr, ETH_ALEN);
1345 pos = (u8 *) (frame + 1);
1346 *pos++ = WLAN_ACTION_FT;
1347 *pos++ = 2; /* Action: Response */
1348 os_memcpy(pos, sta_addr, ETH_ALEN);
1349 pos += ETH_ALEN;
1350 os_memcpy(pos, wpa_auth->addr, ETH_ALEN);
1351 pos += ETH_ALEN;
1352 WPA_PUT_LE16(pos, status);
1353 pos += 2;
1354 if (resp_ies) {
1355 os_memcpy(pos, resp_ies, resp_ies_len);
1356 os_free(resp_ies);
1357 }
1358
1359 wpa_ft_rrb_send(wpa_auth, current_ap, (u8 *) frame,
1360 sizeof(*frame) + rlen);
1361 os_free(frame);
1362
1363 return 0;
1364 }
1365
1366
1367 static int wpa_ft_rrb_rx_pull(struct wpa_authenticator *wpa_auth,
1368 const u8 *src_addr,
1369 const u8 *data, size_t data_len)
1370 {
1371 struct ft_r0kh_r1kh_pull_frame *frame, f;
1372 struct ft_remote_r1kh *r1kh;
1373 struct ft_r0kh_r1kh_resp_frame resp, r;
1374 u8 pmk_r0[PMK_LEN];
1375 int pairwise;
1376
1377 wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull");
1378
1379 if (data_len < sizeof(*frame))
1380 return -1;
1381
1382 r1kh = wpa_auth->conf.r1kh_list;
1383 while (r1kh) {
1384 if (os_memcmp(r1kh->addr, src_addr, ETH_ALEN) == 0)
1385 break;
1386 r1kh = r1kh->next;
1387 }
1388 if (r1kh == NULL) {
1389 wpa_printf(MSG_DEBUG, "FT: No matching R1KH address found for "
1390 "PMK-R1 pull source address " MACSTR,
1391 MAC2STR(src_addr));
1392 return -1;
1393 }
1394
1395 frame = (struct ft_r0kh_r1kh_pull_frame *) data;
1396 /* aes_unwrap() does not support inplace decryption, so use a temporary
1397 * buffer for the data. */
1398 if (aes_unwrap(r1kh->key, (FT_R0KH_R1KH_PULL_DATA_LEN + 7) / 8,
1399 frame->nonce, f.nonce) < 0) {
1400 wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 pull "
1401 "request from " MACSTR, MAC2STR(src_addr));
1402 return -1;
1403 }
1404
1405 wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - nonce",
1406 f.nonce, sizeof(f.nonce));
1407 wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - PMKR0Name",
1408 f.pmk_r0_name, WPA_PMK_NAME_LEN);
1409 wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull - R1KH-ID=" MACSTR "S1KH-ID="
1410 MACSTR, MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id));
1411
1412 os_memset(&resp, 0, sizeof(resp));
1413 resp.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1414 resp.packet_type = FT_PACKET_R0KH_R1KH_RESP;
1415 resp.data_length = host_to_le16(FT_R0KH_R1KH_RESP_DATA_LEN);
1416 os_memcpy(resp.ap_address, wpa_auth->addr, ETH_ALEN);
1417
1418 /* aes_wrap() does not support inplace encryption, so use a temporary
1419 * buffer for the data. */
1420 os_memcpy(r.nonce, f.nonce, sizeof(f.nonce));
1421 os_memcpy(r.r1kh_id, f.r1kh_id, FT_R1KH_ID_LEN);
1422 os_memcpy(r.s1kh_id, f.s1kh_id, ETH_ALEN);
1423 if (wpa_ft_fetch_pmk_r0(wpa_auth, f.s1kh_id, f.pmk_r0_name, pmk_r0,
1424 &pairwise) < 0) {
1425 wpa_printf(MSG_DEBUG, "FT: No matching PMKR0Name found for "
1426 "PMK-R1 pull");
1427 return -1;
1428 }
1429
1430 wpa_derive_pmk_r1(pmk_r0, f.pmk_r0_name, f.r1kh_id, f.s1kh_id,
1431 r.pmk_r1, r.pmk_r1_name);
1432 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", r.pmk_r1, PMK_LEN);
1433 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", r.pmk_r1_name,
1434 WPA_PMK_NAME_LEN);
1435 r.pairwise = host_to_le16(pairwise);
1436
1437 if (aes_wrap(r1kh->key, (FT_R0KH_R1KH_RESP_DATA_LEN + 7) / 8,
1438 r.nonce, resp.nonce) < 0) {
1439 os_memset(pmk_r0, 0, PMK_LEN);
1440 return -1;
1441 }
1442
1443 os_memset(pmk_r0, 0, PMK_LEN);
1444
1445 wpa_ft_rrb_send(wpa_auth, src_addr, (u8 *) &resp, sizeof(resp));
1446
1447 return 0;
1448 }
1449
1450
1451 static int wpa_ft_rrb_rx_resp(struct wpa_authenticator *wpa_auth,
1452 const u8 *src_addr,
1453 const u8 *data, size_t data_len)
1454 {
1455 struct ft_r0kh_r1kh_resp_frame *frame, f;
1456 struct ft_remote_r0kh *r0kh;
1457 int pairwise;
1458
1459 wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull response");
1460
1461 if (data_len < sizeof(*frame))
1462 return -1;
1463
1464 r0kh = wpa_auth->conf.r0kh_list;
1465 while (r0kh) {
1466 if (os_memcmp(r0kh->addr, src_addr, ETH_ALEN) == 0)
1467 break;
1468 r0kh = r0kh->next;
1469 }
1470 if (r0kh == NULL) {
1471 wpa_printf(MSG_DEBUG, "FT: No matching R0KH address found for "
1472 "PMK-R0 pull response source address " MACSTR,
1473 MAC2STR(src_addr));
1474 return -1;
1475 }
1476
1477 frame = (struct ft_r0kh_r1kh_resp_frame *) data;
1478 /* aes_unwrap() does not support inplace decryption, so use a temporary
1479 * buffer for the data. */
1480 if (aes_unwrap(r0kh->key, (FT_R0KH_R1KH_RESP_DATA_LEN + 7) / 8,
1481 frame->nonce, f.nonce) < 0) {
1482 wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 pull "
1483 "response from " MACSTR, MAC2STR(src_addr));
1484 return -1;
1485 }
1486
1487 if (os_memcmp(f.r1kh_id, wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN)
1488 != 0) {
1489 wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull response did not use a "
1490 "matching R1KH-ID");
1491 return -1;
1492 }
1493
1494 /* TODO: verify that <nonce,s1kh_id> matches with a pending request
1495 * and call this requests callback function to finish request
1496 * processing */
1497
1498 pairwise = le_to_host16(f.pairwise);
1499 wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - nonce",
1500 f.nonce, sizeof(f.nonce));
1501 wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull - R1KH-ID=" MACSTR "S1KH-ID="
1502 MACSTR " pairwise=0x%x",
1503 MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id), pairwise);
1504 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1 pull - PMK-R1",
1505 f.pmk_r1, PMK_LEN);
1506 wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - PMKR1Name",
1507 f.pmk_r1_name, WPA_PMK_NAME_LEN);
1508
1509 wpa_ft_store_pmk_r1(wpa_auth, f.s1kh_id, f.pmk_r1, f.pmk_r1_name,
1510 pairwise);
1511 os_memset(f.pmk_r1, 0, PMK_LEN);
1512
1513 return 0;
1514 }
1515
1516
1517 static int wpa_ft_rrb_rx_push(struct wpa_authenticator *wpa_auth,
1518 const u8 *src_addr,
1519 const u8 *data, size_t data_len)
1520 {
1521 struct ft_r0kh_r1kh_push_frame *frame, f;
1522 struct ft_remote_r0kh *r0kh;
1523 struct os_time now;
1524 os_time_t tsend;
1525 int pairwise;
1526
1527 wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 push");
1528
1529 if (data_len < sizeof(*frame))
1530 return -1;
1531
1532 r0kh = wpa_auth->conf.r0kh_list;
1533 while (r0kh) {
1534 if (os_memcmp(r0kh->addr, src_addr, ETH_ALEN) == 0)
1535 break;
1536 r0kh = r0kh->next;
1537 }
1538 if (r0kh == NULL) {
1539 wpa_printf(MSG_DEBUG, "FT: No matching R0KH address found for "
1540 "PMK-R0 push source address " MACSTR,
1541 MAC2STR(src_addr));
1542 return -1;
1543 }
1544
1545 frame = (struct ft_r0kh_r1kh_push_frame *) data;
1546 /* aes_unwrap() does not support inplace decryption, so use a temporary
1547 * buffer for the data. */
1548 if (aes_unwrap(r0kh->key, (FT_R0KH_R1KH_PUSH_DATA_LEN + 7) / 8,
1549 frame->timestamp, f.timestamp) < 0) {
1550 wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 push from "
1551 MACSTR, MAC2STR(src_addr));
1552 return -1;
1553 }
1554
1555 os_get_time(&now);
1556 tsend = WPA_GET_LE32(f.timestamp);
1557 if ((now.sec > tsend && now.sec - tsend > 60) ||
1558 (now.sec < tsend && tsend - now.sec > 60)) {
1559 wpa_printf(MSG_DEBUG, "FT: PMK-R1 push did not have a valid "
1560 "timestamp: sender time %d own time %d\n",
1561 (int) tsend, (int) now.sec);
1562 return -1;
1563 }
1564
1565 if (os_memcmp(f.r1kh_id, wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN)
1566 != 0) {
1567 wpa_printf(MSG_DEBUG, "FT: PMK-R1 push did not use a matching "
1568 "R1KH-ID (received " MACSTR " own " MACSTR ")",
1569 MAC2STR(f.r1kh_id),
1570 MAC2STR(wpa_auth->conf.r1_key_holder));
1571 return -1;
1572 }
1573
1574 pairwise = le_to_host16(f.pairwise);
1575 wpa_printf(MSG_DEBUG, "FT: PMK-R1 push - R1KH-ID=" MACSTR " S1KH-ID="
1576 MACSTR " pairwise=0x%x",
1577 MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id), pairwise);
1578 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1 push - PMK-R1",
1579 f.pmk_r1, PMK_LEN);
1580 wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 push - PMKR1Name",
1581 f.pmk_r1_name, WPA_PMK_NAME_LEN);
1582
1583 wpa_ft_store_pmk_r1(wpa_auth, f.s1kh_id, f.pmk_r1, f.pmk_r1_name,
1584 pairwise);
1585 os_memset(f.pmk_r1, 0, PMK_LEN);
1586
1587 return 0;
1588 }
1589
1590
1591 int wpa_ft_rrb_rx(struct wpa_authenticator *wpa_auth, const u8 *src_addr,
1592 const u8 *data, size_t data_len)
1593 {
1594 struct ft_rrb_frame *frame;
1595 u16 alen;
1596 const u8 *pos, *end, *start;
1597 u8 action;
1598 const u8 *sta_addr, *target_ap_addr;
1599
1600 wpa_printf(MSG_DEBUG, "FT: RRB received frame from remote AP " MACSTR,
1601 MAC2STR(src_addr));
1602
1603 if (data_len < sizeof(*frame)) {
1604 wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (data_len=%lu)",
1605 (unsigned long) data_len);
1606 return -1;
1607 }
1608
1609 pos = data;
1610 frame = (struct ft_rrb_frame *) pos;
1611 pos += sizeof(*frame);
1612
1613 alen = le_to_host16(frame->action_length);
1614 wpa_printf(MSG_DEBUG, "FT: RRB frame - frame_type=%d packet_type=%d "
1615 "action_length=%d ap_address=" MACSTR,
1616 frame->frame_type, frame->packet_type, alen,
1617 MAC2STR(frame->ap_address));
1618
1619 if (frame->frame_type != RSN_REMOTE_FRAME_TYPE_FT_RRB) {
1620 /* Discard frame per IEEE Std 802.11r-2008, 11A.10.3 */
1621 wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with "
1622 "unrecognized type %d", frame->frame_type);
1623 return -1;
1624 }
1625
1626 if (alen > data_len - sizeof(*frame)) {
1627 wpa_printf(MSG_DEBUG, "FT: RRB frame too short for action "
1628 "frame");
1629 return -1;
1630 }
1631
1632 if (frame->packet_type == FT_PACKET_R0KH_R1KH_PULL)
1633 return wpa_ft_rrb_rx_pull(wpa_auth, src_addr, data, data_len);
1634 if (frame->packet_type == FT_PACKET_R0KH_R1KH_RESP)
1635 return wpa_ft_rrb_rx_resp(wpa_auth, src_addr, data, data_len);
1636 if (frame->packet_type == FT_PACKET_R0KH_R1KH_PUSH)
1637 return wpa_ft_rrb_rx_push(wpa_auth, src_addr, data, data_len);
1638
1639 wpa_hexdump(MSG_MSGDUMP, "FT: RRB - FT Action frame", pos, alen);
1640
1641 if (alen < 1 + 1 + 2 * ETH_ALEN) {
1642 wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (not enough "
1643 "room for Action Frame body); alen=%lu",
1644 (unsigned long) alen);
1645 return -1;
1646 }
1647 start = pos;
1648 end = pos + alen;
1649
1650 if (*pos != WLAN_ACTION_FT) {
1651 wpa_printf(MSG_DEBUG, "FT: Unexpected Action frame category "
1652 "%d", *pos);
1653 return -1;
1654 }
1655
1656 pos++;
1657 action = *pos++;
1658 sta_addr = pos;
1659 pos += ETH_ALEN;
1660 target_ap_addr = pos;
1661 pos += ETH_ALEN;
1662 wpa_printf(MSG_DEBUG, "FT: RRB Action Frame: action=%d sta_addr="
1663 MACSTR " target_ap_addr=" MACSTR,
1664 action, MAC2STR(sta_addr), MAC2STR(target_ap_addr));
1665
1666 if (frame->packet_type == FT_PACKET_REQUEST) {
1667 wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Request");
1668
1669 if (action != 1) {
1670 wpa_printf(MSG_DEBUG, "FT: Unexpected Action %d in "
1671 "RRB Request", action);
1672 return -1;
1673 }
1674
1675 if (os_memcmp(target_ap_addr, wpa_auth->addr, ETH_ALEN) != 0) {
1676 wpa_printf(MSG_DEBUG, "FT: Target AP address in the "
1677 "RRB Request does not match with own "
1678 "address");
1679 return -1;
1680 }
1681
1682 if (wpa_ft_rrb_rx_request(wpa_auth, frame->ap_address,
1683 sta_addr, pos, end - pos) < 0)
1684 return -1;
1685 } else if (frame->packet_type == FT_PACKET_RESPONSE) {
1686 u16 status_code;
1687
1688 if (end - pos < 2) {
1689 wpa_printf(MSG_DEBUG, "FT: Not enough room for status "
1690 "code in RRB Response");
1691 return -1;
1692 }
1693 status_code = WPA_GET_LE16(pos);
1694 pos += 2;
1695
1696 wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Response "
1697 "(status_code=%d)", status_code);
1698
1699 if (wpa_ft_action_send(wpa_auth, sta_addr, start, alen) < 0)
1700 return -1;
1701 } else {
1702 wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with unknown "
1703 "packet_type %d", frame->packet_type);
1704 return -1;
1705 }
1706
1707 return 0;
1708 }
1709
1710
1711 static void wpa_ft_generate_pmk_r1(struct wpa_authenticator *wpa_auth,
1712 struct wpa_ft_pmk_r0_sa *pmk_r0,
1713 struct ft_remote_r1kh *r1kh,
1714 const u8 *s1kh_id, int pairwise)
1715 {
1716 struct ft_r0kh_r1kh_push_frame frame, f;
1717 struct os_time now;
1718
1719 os_memset(&frame, 0, sizeof(frame));
1720 frame.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1721 frame.packet_type = FT_PACKET_R0KH_R1KH_PUSH;
1722 frame.data_length = host_to_le16(FT_R0KH_R1KH_PUSH_DATA_LEN);
1723 os_memcpy(frame.ap_address, wpa_auth->addr, ETH_ALEN);
1724
1725 /* aes_wrap() does not support inplace encryption, so use a temporary
1726 * buffer for the data. */
1727 os_memcpy(f.r1kh_id, r1kh->id, FT_R1KH_ID_LEN);
1728 os_memcpy(f.s1kh_id, s1kh_id, ETH_ALEN);
1729 os_memcpy(f.pmk_r0_name, pmk_r0->pmk_r0_name, WPA_PMK_NAME_LEN);
1730 wpa_derive_pmk_r1(pmk_r0->pmk_r0, pmk_r0->pmk_r0_name, r1kh->id,
1731 s1kh_id, f.pmk_r1, f.pmk_r1_name);
1732 wpa_printf(MSG_DEBUG, "FT: R1KH-ID " MACSTR, MAC2STR(r1kh->id));
1733 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", f.pmk_r1, PMK_LEN);
1734 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", f.pmk_r1_name,
1735 WPA_PMK_NAME_LEN);
1736 os_get_time(&now);
1737 WPA_PUT_LE32(f.timestamp, now.sec);
1738 f.pairwise = host_to_le16(pairwise);
1739 if (aes_wrap(r1kh->key, (FT_R0KH_R1KH_PUSH_DATA_LEN + 7) / 8,
1740 f.timestamp, frame.timestamp) < 0)
1741 return;
1742
1743 wpa_ft_rrb_send(wpa_auth, r1kh->addr, (u8 *) &frame, sizeof(frame));
1744 }
1745
1746
1747 void wpa_ft_push_pmk_r1(struct wpa_authenticator *wpa_auth, const u8 *addr)
1748 {
1749 struct wpa_ft_pmk_r0_sa *r0;
1750 struct ft_remote_r1kh *r1kh;
1751
1752 if (!wpa_auth->conf.pmk_r1_push)
1753 return;
1754
1755 r0 = wpa_auth->ft_pmk_cache->pmk_r0;
1756 while (r0) {
1757 if (os_memcmp(r0->spa, addr, ETH_ALEN) == 0)
1758 break;
1759 r0 = r0->next;
1760 }
1761
1762 if (r0 == NULL || r0->pmk_r1_pushed)
1763 return;
1764 r0->pmk_r1_pushed = 1;
1765
1766 wpa_printf(MSG_DEBUG, "FT: Deriving and pushing PMK-R1 keys to R1KHs "
1767 "for STA " MACSTR, MAC2STR(addr));
1768
1769 r1kh = wpa_auth->conf.r1kh_list;
1770 while (r1kh) {
1771 wpa_ft_generate_pmk_r1(wpa_auth, r0, r1kh, addr, r0->pairwise);
1772 r1kh = r1kh->next;
1773 }
1774 }
1775
1776 #endif /* CONFIG_IEEE80211R */
Mirror of AROS' svn.