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Remove the GPL notification from files contributed by Jouni Malinen
[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 4 *
0f3d578e
JM		 5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
6fc6879b
JM		 7 */
8
6226e38d 9#include "utils/includes.h"
6fc6879b 10
6226e38d 11#include "utils/common.h"
81f4f619
JM		 12#include "common/ieee802_11_defs.h"
13#include "common/ieee802_11_common.h"
03da66bd 14#include "crypto/aes_wrap.h"
3642c431 15#include "crypto/random.h"
6226e38d 16#include "ap_config.h"
6fc6879b 17#include "ieee802_11.h"
1057d78e 18#include "wmm.h"
6226e38d 19#include "wpa_auth.h"
6fc6879b 20#include "wpa_auth_i.h"
6fc6879b
JM		 21
22
23#ifdef CONFIG_IEEE80211R
24
25static int wpa_ft_rrb_send(struct wpa_authenticator *wpa_auth, const u8 *dst,
26 const u8 *data, size_t data_len)
27{
28 if (wpa_auth->cb.send_ether == NULL)
29 return -1;
67ccef7e 30 wpa_printf(MSG_DEBUG, "FT: RRB send to " MACSTR, MAC2STR(dst));
6fc6879b
JM		 31 return wpa_auth->cb.send_ether(wpa_auth->cb.ctx, dst, ETH_P_RRB,
32 data, data_len);
33}
34
35
36static int wpa_ft_action_send(struct wpa_authenticator *wpa_auth,
37 const u8 *dst, const u8 *data, size_t data_len)
38{
39 if (wpa_auth->cb.send_ft_action == NULL)
40 return -1;
41 return wpa_auth->cb.send_ft_action(wpa_auth->cb.ctx, dst,
42 data, data_len);
43}
44
45
46static struct wpa_state_machine *
47wpa_ft_add_sta(struct wpa_authenticator *wpa_auth, const u8 *sta_addr)
48{
49 if (wpa_auth->cb.add_sta == NULL)
50 return NULL;
51 return wpa_auth->cb.add_sta(wpa_auth->cb.ctx, sta_addr);
52}
53
54
55int wpa_write_mdie(struct wpa_auth_config *conf, u8 *buf, size_t len)
56{
57 u8 *pos = buf;
58 u8 capab;
59 if (len < 2 + sizeof(struct rsn_mdie))
60 return -1;
61
62 *pos++ = WLAN_EID_MOBILITY_DOMAIN;
63 *pos++ = MOBILITY_DOMAIN_ID_LEN + 1;
64 os_memcpy(pos, conf->mobility_domain, MOBILITY_DOMAIN_ID_LEN);
65 pos += MOBILITY_DOMAIN_ID_LEN;
d7956add
SP		 66 capab = 0;
67 if (conf->ft_over_ds)
68 capab |= RSN_FT_CAPAB_FT_OVER_DS;
6fc6879b
JM		 69 *pos++ = capab;
70
71 return pos - buf;
72}
73
74
86dfabb8
JM		 75int wpa_write_ftie(struct wpa_auth_config *conf, const u8 *r0kh_id,
76 size_t r0kh_id_len,
77 const u8 *anonce, const u8 *snonce,
78 u8 *buf, size_t len, const u8 *subelem,
79 size_t subelem_len)
6fc6879b
JM		 80{
81 u8 *pos = buf, *ielen;
82 struct rsn_ftie *hdr;
83
84 if (len < 2 + sizeof(*hdr) + 2 + FT_R1KH_ID_LEN + 2 + r0kh_id_len +
85 subelem_len)
86 return -1;
87
88 *pos++ = WLAN_EID_FAST_BSS_TRANSITION;
89 ielen = pos++;
90
91 hdr = (struct rsn_ftie *) pos;
92 os_memset(hdr, 0, sizeof(*hdr));
93 pos += sizeof(*hdr);
94 WPA_PUT_LE16(hdr->mic_control, 0);
95 if (anonce)
96 os_memcpy(hdr->anonce, anonce, WPA_NONCE_LEN);
97 if (snonce)
98 os_memcpy(hdr->snonce, snonce, WPA_NONCE_LEN);
99
100 /* Optional Parameters */
101 *pos++ = FTIE_SUBELEM_R1KH_ID;
102 *pos++ = FT_R1KH_ID_LEN;
103 os_memcpy(pos, conf->r1_key_holder, FT_R1KH_ID_LEN);
104 pos += FT_R1KH_ID_LEN;
105
106 if (r0kh_id) {
107 *pos++ = FTIE_SUBELEM_R0KH_ID;
108 *pos++ = r0kh_id_len;
109 os_memcpy(pos, r0kh_id, r0kh_id_len);
110 pos += r0kh_id_len;
111 }
112
113 if (subelem) {
114 os_memcpy(pos, subelem, subelem_len);
115 pos += subelem_len;
116 }
117
118 *ielen = pos - buf - 2;
119
120 return pos - buf;
121}
122
123
124struct wpa_ft_pmk_r0_sa {
125 struct wpa_ft_pmk_r0_sa *next;
126 u8 pmk_r0[PMK_LEN];
127 u8 pmk_r0_name[WPA_PMK_NAME_LEN];
128 u8 spa[ETH_ALEN];
1b484d60 129 int pairwise; /* Pairwise cipher suite, WPA_CIPHER_* */
6fc6879b
JM		 130 /* TODO: expiration, identity, radius_class, EAP type, VLAN ID */
131 int pmk_r1_pushed;
132};
133
134struct wpa_ft_pmk_r1_sa {
135 struct wpa_ft_pmk_r1_sa *next;
136 u8 pmk_r1[PMK_LEN];
137 u8 pmk_r1_name[WPA_PMK_NAME_LEN];
138 u8 spa[ETH_ALEN];
1b484d60 139 int pairwise; /* Pairwise cipher suite, WPA_CIPHER_* */
6fc6879b
JM		 140 /* TODO: expiration, identity, radius_class, EAP type, VLAN ID */
141};
142
143struct wpa_ft_pmk_cache {
144 struct wpa_ft_pmk_r0_sa *pmk_r0;
145 struct wpa_ft_pmk_r1_sa *pmk_r1;
146};
147
148struct wpa_ft_pmk_cache * wpa_ft_pmk_cache_init(void)
149{
150 struct wpa_ft_pmk_cache *cache;
151
152 cache = os_zalloc(sizeof(*cache));
153
154 return cache;
155}
156
157
158void wpa_ft_pmk_cache_deinit(struct wpa_ft_pmk_cache *cache)
159{
160 struct wpa_ft_pmk_r0_sa *r0, *r0prev;
161 struct wpa_ft_pmk_r1_sa *r1, *r1prev;
162
163 r0 = cache->pmk_r0;
164 while (r0) {
165 r0prev = r0;
166 r0 = r0->next;
167 os_memset(r0prev->pmk_r0, 0, PMK_LEN);
168 os_free(r0prev);
169 }
170
171 r1 = cache->pmk_r1;
172 while (r1) {
173 r1prev = r1;
174 r1 = r1->next;
175 os_memset(r1prev->pmk_r1, 0, PMK_LEN);
176 os_free(r1prev);
177 }
178
179 os_free(cache);
180}
181
182
183static int wpa_ft_store_pmk_r0(struct wpa_authenticator *wpa_auth,
184 const u8 *spa, const u8 *pmk_r0,
1b484d60 185 const u8 *pmk_r0_name, int pairwise)
6fc6879b
JM		 186{
187 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
188 struct wpa_ft_pmk_r0_sa *r0;
189
190 /* TODO: add expiration and limit on number of entries in cache */
191
192 r0 = os_zalloc(sizeof(*r0));
193 if (r0 == NULL)
194 return -1;
195
196 os_memcpy(r0->pmk_r0, pmk_r0, PMK_LEN);
197 os_memcpy(r0->pmk_r0_name, pmk_r0_name, WPA_PMK_NAME_LEN);
198 os_memcpy(r0->spa, spa, ETH_ALEN);
1b484d60 199 r0->pairwise = pairwise;
6fc6879b
JM		 200
201 r0->next = cache->pmk_r0;
202 cache->pmk_r0 = r0;
203
204 return 0;
205}
206
207
208static int wpa_ft_fetch_pmk_r0(struct wpa_authenticator *wpa_auth,
209 const u8 *spa, const u8 *pmk_r0_name,
1b484d60 210 u8 *pmk_r0, 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 r0 = cache->pmk_r0;
216 while (r0) {
217 if (os_memcmp(r0->spa, spa, ETH_ALEN) == 0 &&
218 os_memcmp(r0->pmk_r0_name, pmk_r0_name, WPA_PMK_NAME_LEN)
219 == 0) {
220 os_memcpy(pmk_r0, r0->pmk_r0, PMK_LEN);
1b484d60
JM		 221 if (pairwise)
222 *pairwise = r0->pairwise;
6fc6879b
JM		 223 return 0;
224 }
225
226 r0 = r0->next;
227 }
228
229 return -1;
230}
231
232
233static int wpa_ft_store_pmk_r1(struct wpa_authenticator *wpa_auth,
234 const u8 *spa, const u8 *pmk_r1,
1b484d60 235 const u8 *pmk_r1_name, int pairwise)
6fc6879b
JM		 236{
237 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
238 struct wpa_ft_pmk_r1_sa *r1;
239
240 /* TODO: add expiration and limit on number of entries in cache */
241
242 r1 = os_zalloc(sizeof(*r1));
243 if (r1 == NULL)
244 return -1;
245
246 os_memcpy(r1->pmk_r1, pmk_r1, PMK_LEN);
247 os_memcpy(r1->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN);
248 os_memcpy(r1->spa, spa, ETH_ALEN);
1b484d60 249 r1->pairwise = pairwise;
6fc6879b
JM		 250
251 r1->next = cache->pmk_r1;
252 cache->pmk_r1 = r1;
253
254 return 0;
255}
256
257
258static int wpa_ft_fetch_pmk_r1(struct wpa_authenticator *wpa_auth,
259 const u8 *spa, const u8 *pmk_r1_name,
1b484d60 260 u8 *pmk_r1, 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 r1 = cache->pmk_r1;
266 while (r1) {
267 if (os_memcmp(r1->spa, spa, ETH_ALEN) == 0 &&
268 os_memcmp(r1->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN)
269 == 0) {
270 os_memcpy(pmk_r1, r1->pmk_r1, PMK_LEN);
1b484d60
JM		 271 if (pairwise)
272 *pairwise = r1->pairwise;
6fc6879b
JM		 273 return 0;
274 }
275
276 r1 = r1->next;
277 }
278
279 return -1;
280}
281
282
283static int wpa_ft_pull_pmk_r1(struct wpa_authenticator *wpa_auth,
284 const u8 *s1kh_id, const u8 *r0kh_id,
285 size_t r0kh_id_len, const u8 *pmk_r0_name)
286{
287 struct ft_remote_r0kh *r0kh;
288 struct ft_r0kh_r1kh_pull_frame frame, f;
289
290 r0kh = wpa_auth->conf.r0kh_list;
291 while (r0kh) {
292 if (r0kh->id_len == r0kh_id_len &&
293 os_memcmp(r0kh->id, r0kh_id, r0kh_id_len) == 0)
294 break;
295 r0kh = r0kh->next;
296 }
297 if (r0kh == NULL)
298 return -1;
299
300 wpa_printf(MSG_DEBUG, "FT: Send PMK-R1 pull request to remote R0KH "
301 "address " MACSTR, MAC2STR(r0kh->addr));
302
303 os_memset(&frame, 0, sizeof(frame));
304 frame.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
305 frame.packet_type = FT_PACKET_R0KH_R1KH_PULL;
306 frame.data_length = host_to_le16(FT_R0KH_R1KH_PULL_DATA_LEN);
307 os_memcpy(frame.ap_address, wpa_auth->addr, ETH_ALEN);
308
309 /* aes_wrap() does not support inplace encryption, so use a temporary
310 * buffer for the data. */
3642c431 311 if (random_get_bytes(f.nonce, sizeof(f.nonce))) {
6fc6879b
JM		 312 wpa_printf(MSG_DEBUG, "FT: Failed to get random data for "
313 "nonce");
314 return -1;
315 }
316 os_memcpy(f.pmk_r0_name, pmk_r0_name, WPA_PMK_NAME_LEN);
317 os_memcpy(f.r1kh_id, wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN);
318 os_memcpy(f.s1kh_id, s1kh_id, ETH_ALEN);
319
320 if (aes_wrap(r0kh->key, (FT_R0KH_R1KH_PULL_DATA_LEN + 7) / 8,
321 f.nonce, frame.nonce) < 0)
322 return -1;
323
324 wpa_ft_rrb_send(wpa_auth, r0kh->addr, (u8 *) &frame, sizeof(frame));
325
326 return 0;
327}
328
329
330int wpa_auth_derive_ptk_ft(struct wpa_state_machine *sm, const u8 *pmk,
c0a61908 331 struct wpa_ptk *ptk, size_t ptk_len)
6fc6879b
JM		 332{
333 u8 pmk_r0[PMK_LEN], pmk_r0_name[WPA_PMK_NAME_LEN];
26e23750 334 u8 pmk_r1[PMK_LEN];
6fc6879b
JM		 335 u8 ptk_name[WPA_PMK_NAME_LEN];
336 const u8 *mdid = sm->wpa_auth->conf.mobility_domain;
337 const u8 *r0kh = sm->wpa_auth->conf.r0_key_holder;
338 size_t r0kh_len = sm->wpa_auth->conf.r0_key_holder_len;
339 const u8 *r1kh = sm->wpa_auth->conf.r1_key_holder;
340 const u8 *ssid = sm->wpa_auth->conf.ssid;
341 size_t ssid_len = sm->wpa_auth->conf.ssid_len;
342
343
344 if (sm->xxkey_len == 0) {
345 wpa_printf(MSG_DEBUG, "FT: XXKey not available for key "
346 "derivation");
347 return -1;
348 }
349
350 wpa_derive_pmk_r0(sm->xxkey, sm->xxkey_len, ssid, ssid_len, mdid,
351 r0kh, r0kh_len, sm->addr, pmk_r0, pmk_r0_name);
352 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R0", pmk_r0, PMK_LEN);
353 wpa_hexdump(MSG_DEBUG, "FT: PMKR0Name", pmk_r0_name, WPA_PMK_NAME_LEN);
1b484d60
JM		 354 wpa_ft_store_pmk_r0(sm->wpa_auth, sm->addr, pmk_r0, pmk_r0_name,
355 sm->pairwise);
6fc6879b
JM		 356
357 wpa_derive_pmk_r1(pmk_r0, pmk_r0_name, r1kh, sm->addr,
26e23750 358 pmk_r1, sm->pmk_r1_name);
6fc6879b 359 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", pmk_r1, PMK_LEN);
26e23750
JM		 360 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", sm->pmk_r1_name,
361 WPA_PMK_NAME_LEN);
362 wpa_ft_store_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1, sm->pmk_r1_name,
1b484d60 363 sm->pairwise);
6fc6879b
JM		 364
365 wpa_pmk_r1_to_ptk(pmk_r1, sm->SNonce, sm->ANonce, sm->addr,
26e23750 366 sm->wpa_auth->addr, sm->pmk_r1_name,
c0a61908
JM		 367 (u8 *) ptk, ptk_len, ptk_name);
368 wpa_hexdump_key(MSG_DEBUG, "FT: PTK", (u8 *) ptk, ptk_len);
6fc6879b
JM		 369 wpa_hexdump(MSG_DEBUG, "FT: PTKName", ptk_name, WPA_PMK_NAME_LEN);
370
371 return 0;
372}
373
374
375static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
376 const u8 *addr, int idx, u8 *seq)
377{
378 if (wpa_auth->cb.get_seqnum == NULL)
379 return -1;
380 return wpa_auth->cb.get_seqnum(wpa_auth->cb.ctx, addr, idx, seq);
381}
382
383
384static u8 * wpa_ft_gtk_subelem(struct wpa_state_machine *sm, size_t *len)
385{
386 u8 *subelem;
387 struct wpa_group *gsm = sm->group;
388 size_t subelem_len, pad_len;
389 const u8 *key;
390 size_t key_len;
391 u8 keybuf[32];
392
393 key_len = gsm->GTK_len;
394 if (key_len > sizeof(keybuf))
395 return NULL;
396
397 /*
398 * Pad key for AES Key Wrap if it is not multiple of 8 bytes or is less
399 * than 16 bytes.
400 */
401 pad_len = key_len % 8;
402 if (pad_len)
403 pad_len = 8 - pad_len;
404 if (key_len + pad_len < 16)
405 pad_len += 8;
406 if (pad_len) {
407 os_memcpy(keybuf, gsm->GTK[gsm->GN - 1], key_len);
408 os_memset(keybuf + key_len, 0, pad_len);
409 keybuf[key_len] = 0xdd;
410 key_len += pad_len;
411 key = keybuf;
412 } else
413 key = gsm->GTK[gsm->GN - 1];
414
415 /*
39eb4d08 416 * Sub-elem ID[1] | Length[1] | Key Info[2] | Key Length[1] | RSC[8] |
6fc6879b
JM		 417 * Key[5..32].
418 */
39eb4d08 419 subelem_len = 13 + key_len + 8;
6fc6879b
JM		 420 subelem = os_zalloc(subelem_len);
421 if (subelem == NULL)
422 return NULL;
423
424 subelem[0] = FTIE_SUBELEM_GTK;
39eb4d08
JM		 425 subelem[1] = 11 + key_len + 8;
426 /* Key ID in B0-B1 of Key Info */
427 WPA_PUT_LE16(&subelem[2], gsm->GN & 0x03);
428 subelem[4] = gsm->GTK_len;
429 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, subelem + 5);
430 if (aes_wrap(sm->PTK.kek, key_len / 8, key, subelem + 13)) {
6fc6879b
JM		 431 os_free(subelem);
432 return NULL;
433 }
434
435 *len = subelem_len;
436 return subelem;
437}
438
439
b27f13ed
JM		 440#ifdef CONFIG_IEEE80211W
441static u8 * wpa_ft_igtk_subelem(struct wpa_state_machine *sm, size_t *len)
442{
443 u8 *subelem, *pos;
444 struct wpa_group *gsm = sm->group;
445 size_t subelem_len;
446
ff89afb7
JM		 447 /* Sub-elem ID[1] | Length[1] | KeyID[2] | IPN[6] | Key Length[1] |
448 * Key[16+8] */
449 subelem_len = 1 + 1 + 2 + 6 + 1 + WPA_IGTK_LEN + 8;
b27f13ed
JM		 450 subelem = os_zalloc(subelem_len);
451 if (subelem == NULL)
452 return NULL;
453
454 pos = subelem;
455 *pos++ = FTIE_SUBELEM_IGTK;
456 *pos++ = subelem_len - 2;
457 WPA_PUT_LE16(pos, gsm->GN_igtk);
458 pos += 2;
9008a3e4 459 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos);
b27f13ed 460 pos += 6;
ff89afb7 461 *pos++ = WPA_IGTK_LEN;
b27f13ed
JM		 462 if (aes_wrap(sm->PTK.kek, WPA_IGTK_LEN / 8,
463 gsm->IGTK[gsm->GN_igtk - 4], pos)) {
464 os_free(subelem);
465 return NULL;
466 }
467
468 *len = subelem_len;
469 return subelem;
470}
471#endif /* CONFIG_IEEE80211W */
472
473
f238cf9f
JM		 474static u8 * wpa_ft_process_rdie(u8 *pos, u8 *end, u8 id, u8 descr_count,
475 const u8 *ies, size_t ies_len)
476{
477 struct ieee802_11_elems parse;
478 struct rsn_rdie *rdie;
479
480 wpa_printf(MSG_DEBUG, "FT: Resource Request: id=%d descr_count=%d",
481 id, descr_count);
482 wpa_hexdump(MSG_MSGDUMP, "FT: Resource descriptor IE(s)",
483 ies, ies_len);
484
485 if (end - pos < (int) sizeof(*rdie)) {
486 wpa_printf(MSG_ERROR, "FT: Not enough room for response RDIE");
487 return pos;
488 }
489
490 *pos++ = WLAN_EID_RIC_DATA;
491 *pos++ = sizeof(*rdie);
492 rdie = (struct rsn_rdie *) pos;
493 rdie->id = id;
494 rdie->descr_count = 0;
495 rdie->status_code = host_to_le16(WLAN_STATUS_SUCCESS);
496 pos += sizeof(*rdie);
497
498 if (ieee802_11_parse_elems((u8 *) ies, ies_len, &parse, 1) ==
499 ParseFailed) {
500 wpa_printf(MSG_DEBUG, "FT: Failed to parse request IEs");
501 rdie->status_code =
502 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
503 return pos;
504 }
505
fe6bdb77 506#ifdef NEED_AP_MLME
f238cf9f
JM		 507 if (parse.wmm_tspec) {
508 struct wmm_tspec_element *tspec;
509 int res;
510
511 if (parse.wmm_tspec_len + 2 < (int) sizeof(*tspec)) {
512 wpa_printf(MSG_DEBUG, "FT: Too short WMM TSPEC IE "
513 "(%d)", (int) parse.wmm_tspec_len);
514 rdie->status_code =
515 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
516 return pos;
517 }
518 if (end - pos < (int) sizeof(*tspec)) {
519 wpa_printf(MSG_ERROR, "FT: Not enough room for "
520 "response TSPEC");
521 rdie->status_code =
522 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
523 return pos;
524 }
525 tspec = (struct wmm_tspec_element *) pos;
526 os_memcpy(tspec, parse.wmm_tspec - 2, sizeof(*tspec));
527 res = wmm_process_tspec(tspec);
528 wpa_printf(MSG_DEBUG, "FT: ADDTS processing result: %d", res);
529 if (res == WMM_ADDTS_STATUS_INVALID_PARAMETERS)
530 rdie->status_code =
531 host_to_le16(WLAN_STATUS_INVALID_PARAMETERS);
532 else if (res == WMM_ADDTS_STATUS_REFUSED)
533 rdie->status_code =
534 host_to_le16(WLAN_STATUS_REQUEST_DECLINED);
535 else {
536 /* TSPEC accepted; include updated TSPEC in response */
537 rdie->descr_count = 1;
538 pos += sizeof(*tspec);
539 }
540 return pos;
541 }
fe6bdb77 542#endif /* NEED_AP_MLME */
f238cf9f
JM		 543
544 wpa_printf(MSG_DEBUG, "FT: No supported resource requested");
545 rdie->status_code = host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
546 return pos;
547}
548
549
550static u8 * wpa_ft_process_ric(u8 *pos, u8 *end, const u8 *ric, size_t ric_len)
551{
552 const u8 *rpos, *start;
553 const struct rsn_rdie *rdie;
554
555 wpa_hexdump(MSG_MSGDUMP, "FT: RIC Request", ric, ric_len);
556
557 rpos = ric;
558 while (rpos + sizeof(*rdie) < ric + ric_len) {
559 if (rpos[0] != WLAN_EID_RIC_DATA || rpos[1] < sizeof(*rdie) ||
560 rpos + 2 + rpos[1] > ric + ric_len)
561 break;
562 rdie = (const struct rsn_rdie *) (rpos + 2);
563 rpos += 2 + rpos[1];
564 start = rpos;
565
566 while (rpos + 2 <= ric + ric_len &&
567 rpos + 2 + rpos[1] <= ric + ric_len) {
568 if (rpos[0] == WLAN_EID_RIC_DATA)
569 break;
570 rpos += 2 + rpos[1];
571 }
572 pos = wpa_ft_process_rdie(pos, end, rdie->id,
573 rdie->descr_count,
574 start, rpos - start);
575 }
576
577 return pos;
578}
579
580
6fc6879b 581u8 * wpa_sm_write_assoc_resp_ies(struct wpa_state_machine *sm, u8 *pos,
f238cf9f
JM		 582 size_t max_len, int auth_alg,
583 const u8 *req_ies, size_t req_ies_len)
6fc6879b 584{
738a1cb2
JM		 585 u8 *end, *mdie, *ftie, *rsnie = NULL, *r0kh_id, *subelem = NULL;
586 size_t mdie_len, ftie_len, rsnie_len = 0, r0kh_id_len, subelem_len = 0;
6fc6879b
JM		 587 int res;
588 struct wpa_auth_config *conf;
589 struct rsn_ftie *_ftie;
f238cf9f
JM		 590 struct wpa_ft_ies parse;
591 u8 *ric_start;
6e80516a 592 u8 *anonce, *snonce;
6fc6879b
JM		 593
594 if (sm == NULL)
595 return pos;
596
597 conf = &sm->wpa_auth->conf;
598
599 if (sm->wpa_key_mgmt != WPA_KEY_MGMT_FT_IEEE8021X &&
600 sm->wpa_key_mgmt != WPA_KEY_MGMT_FT_PSK)
601 return pos;
602
603 end = pos + max_len;
604
738a1cb2
JM		 605 if (auth_alg == WLAN_AUTH_FT) {
606 /*
607 * RSN (only present if this is a Reassociation Response and
608 * part of a fast BSS transition)
609 */
610 res = wpa_write_rsn_ie(conf, pos, end - pos, sm->pmk_r1_name);
611 if (res < 0)
612 return pos;
613 rsnie = pos;
614 rsnie_len = res;
615 pos += res;
616 }
6fc6879b
JM		 617
618 /* Mobility Domain Information */
619 res = wpa_write_mdie(conf, pos, end - pos);
620 if (res < 0)
621 return pos;
622 mdie = pos;
623 mdie_len = res;
624 pos += res;
625
626 /* Fast BSS Transition Information */
627 if (auth_alg == WLAN_AUTH_FT) {
628 subelem = wpa_ft_gtk_subelem(sm, &subelem_len);
629 r0kh_id = sm->r0kh_id;
630 r0kh_id_len = sm->r0kh_id_len;
6e80516a
JM		 631 anonce = sm->ANonce;
632 snonce = sm->SNonce;
b27f13ed
JM		 633#ifdef CONFIG_IEEE80211W
634 if (sm->mgmt_frame_prot) {
635 u8 *igtk;
636 size_t igtk_len;
637 u8 *nbuf;
638 igtk = wpa_ft_igtk_subelem(sm, &igtk_len);
639 if (igtk == NULL) {
640 os_free(subelem);
641 return pos;
642 }
643 nbuf = os_realloc(subelem, subelem_len + igtk_len);
644 if (nbuf == NULL) {
645 os_free(subelem);
646 os_free(igtk);
647 return pos;
648 }
649 subelem = nbuf;
650 os_memcpy(subelem + subelem_len, igtk, igtk_len);
651 subelem_len += igtk_len;
652 os_free(igtk);
653 }
654#endif /* CONFIG_IEEE80211W */
6fc6879b
JM		 655 } else {
656 r0kh_id = conf->r0_key_holder;
657 r0kh_id_len = conf->r0_key_holder_len;
6e80516a
JM		 658 anonce = NULL;
659 snonce = NULL;
6fc6879b 660 }
6e80516a 661 res = wpa_write_ftie(conf, r0kh_id, r0kh_id_len, anonce, snonce, pos,
6fc6879b
JM		 662 end - pos, subelem, subelem_len);
663 os_free(subelem);
664 if (res < 0)
665 return pos;
666 ftie = pos;
667 ftie_len = res;
668 pos += res;
669
0f857f43
JM		 670 os_free(sm->assoc_resp_ftie);
671 sm->assoc_resp_ftie = os_malloc(ftie_len);
672 if (sm->assoc_resp_ftie)
673 os_memcpy(sm->assoc_resp_ftie, ftie, ftie_len);
674
6fc6879b 675 _ftie = (struct rsn_ftie *) (ftie + 2);
1f6e69e0
JM		 676 if (auth_alg == WLAN_AUTH_FT)
677 _ftie->mic_control[1] = 3; /* Information element count */
f238cf9f
JM		 678
679 ric_start = pos;
680 if (wpa_ft_parse_ies(req_ies, req_ies_len, &parse) == 0 && parse.ric) {
681 pos = wpa_ft_process_ric(pos, end, parse.ric, parse.ric_len);
1f6e69e0
JM		 682 if (auth_alg == WLAN_AUTH_FT)
683 _ftie->mic_control[1] +=
684 ieee802_11_ie_count(ric_start,
685 pos - ric_start);
f238cf9f
JM		 686 }
687 if (ric_start == pos)
688 ric_start = NULL;
689
1f6e69e0
JM		 690 if (auth_alg == WLAN_AUTH_FT &&
691 wpa_ft_mic(sm->PTK.kck, sm->addr, sm->wpa_auth->addr, 6,
6fc6879b 692 mdie, mdie_len, ftie, ftie_len,
f238cf9f
JM		 693 rsnie, rsnie_len,
694 ric_start, ric_start ? pos - ric_start : 0,
695 _ftie->mic) < 0)
6fc6879b
JM		 696 wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC");
697
698 return pos;
699}
700
701
6fc6879b
JM		 702static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
703 int vlan_id,
71934751 704 enum wpa_alg alg, const u8 *addr, int idx,
6fc6879b
JM		 705 u8 *key, size_t key_len)
706{
707 if (wpa_auth->cb.set_key == NULL)
708 return -1;
709 return wpa_auth->cb.set_key(wpa_auth->cb.ctx, vlan_id, alg, addr, idx,
710 key, key_len);
711}
712
713
0e84c254 714void wpa_ft_install_ptk(struct wpa_state_machine *sm)
6fc6879b 715{
71934751 716 enum wpa_alg alg;
6fc6879b
JM		 717 int klen;
718
719 /* MLME-SETKEYS.request(PTK) */
720 if (sm->pairwise == WPA_CIPHER_TKIP) {
89d39d9d 721 alg = WPA_ALG_TKIP;
6fc6879b
JM		 722 klen = 32;
723 } else if (sm->pairwise == WPA_CIPHER_CCMP) {
89d39d9d 724 alg = WPA_ALG_CCMP;
6fc6879b 725 klen = 16;
0e84c254
JM		 726 } else {
727 wpa_printf(MSG_DEBUG, "FT: Unknown pairwise alg 0x%x - skip "
728 "PTK configuration", sm->pairwise);
6fc6879b 729 return;
0e84c254 730 }
6fc6879b
JM		 731
732 /* FIX: add STA entry to kernel/driver here? The set_key will fail
733 * most likely without this.. At the moment, STA entry is added only
0e84c254
JM		 734 * after association has been completed. This function will be called
735 * again after association to get the PTK configured, but that could be
736 * optimized by adding the STA entry earlier.
6fc6879b
JM		 737 */
738 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
739 sm->PTK.tk1, klen))
740 return;
741
742 /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
743 sm->pairwise_set = TRUE;
744}
745
746
747static u16 wpa_ft_process_auth_req(struct wpa_state_machine *sm,
748 const u8 *ies, size_t ies_len,
749 u8 **resp_ies, size_t *resp_ies_len)
750{
751 struct rsn_mdie *mdie;
752 struct rsn_ftie *ftie;
753 u8 pmk_r1[PMK_LEN], pmk_r1_name[WPA_PMK_NAME_LEN];
754 u8 ptk_name[WPA_PMK_NAME_LEN];
755 struct wpa_auth_config *conf;
756 struct wpa_ft_ies parse;
c0a61908 757 size_t buflen, ptk_len;
6fc6879b
JM		 758 int ret;
759 u8 *pos, *end;
1b484d60 760 int pairwise;
6fc6879b
JM		 761
762 *resp_ies = NULL;
763 *resp_ies_len = 0;
764
765 sm->pmk_r1_name_valid = 0;
766 conf = &sm->wpa_auth->conf;
767
768 wpa_hexdump(MSG_DEBUG, "FT: Received authentication frame IEs",
769 ies, ies_len);
770
771 if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) {
772 wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs");
773 return WLAN_STATUS_UNSPECIFIED_FAILURE;
774 }
775
776 mdie = (struct rsn_mdie *) parse.mdie;
777 if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
778 os_memcmp(mdie->mobility_domain,
779 sm->wpa_auth->conf.mobility_domain,
780 MOBILITY_DOMAIN_ID_LEN) != 0) {
781 wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
782 return WLAN_STATUS_INVALID_MDIE;
783 }
784
785 ftie = (struct rsn_ftie *) parse.ftie;
786 if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
787 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
788 return WLAN_STATUS_INVALID_FTIE;
789 }
790
791 os_memcpy(sm->SNonce, ftie->snonce, WPA_NONCE_LEN);
792
793 if (parse.r0kh_id == NULL) {
794 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE - no R0KH-ID");
795 return WLAN_STATUS_INVALID_FTIE;
796 }
797
798 wpa_hexdump(MSG_DEBUG, "FT: STA R0KH-ID",
799 parse.r0kh_id, parse.r0kh_id_len);
800 os_memcpy(sm->r0kh_id, parse.r0kh_id, parse.r0kh_id_len);
801 sm->r0kh_id_len = parse.r0kh_id_len;
802
803 if (parse.rsn_pmkid == NULL) {
804 wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE");
805 return WLAN_STATUS_INVALID_PMKID;
806 }
807
808 wpa_hexdump(MSG_DEBUG, "FT: Requested PMKR0Name",
809 parse.rsn_pmkid, WPA_PMK_NAME_LEN);
810 wpa_derive_pmk_r1_name(parse.rsn_pmkid,
811 sm->wpa_auth->conf.r1_key_holder, sm->addr,
812 pmk_r1_name);
813 wpa_hexdump(MSG_DEBUG, "FT: Derived requested PMKR1Name",
814 pmk_r1_name, WPA_PMK_NAME_LEN);
815
1b484d60
JM		 816 if (wpa_ft_fetch_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1_name, pmk_r1,
817 &pairwise) < 0) {
6fc6879b
JM		 818 if (wpa_ft_pull_pmk_r1(sm->wpa_auth, sm->addr, sm->r0kh_id,
819 sm->r0kh_id_len, parse.rsn_pmkid) < 0) {
820 wpa_printf(MSG_DEBUG, "FT: Did not have matching "
821 "PMK-R1 and unknown R0KH-ID");
822 return WLAN_STATUS_INVALID_PMKID;
823 }
824
825 /*
826 * TODO: Should return "status pending" (and the caller should
827 * not send out response now). The real response will be sent
828 * once the response from R0KH is received.
829 */
830 return WLAN_STATUS_INVALID_PMKID;
831 }
832
833 wpa_hexdump_key(MSG_DEBUG, "FT: Selected PMK-R1", pmk_r1, PMK_LEN);
834 sm->pmk_r1_name_valid = 1;
835 os_memcpy(sm->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN);
836
3642c431 837 if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) {
6fc6879b
JM		 838 wpa_printf(MSG_DEBUG, "FT: Failed to get random data for "
839 "ANonce");
840 return WLAN_STATUS_UNSPECIFIED_FAILURE;
841 }
842
843 wpa_hexdump(MSG_DEBUG, "FT: Received SNonce",
844 sm->SNonce, WPA_NONCE_LEN);
845 wpa_hexdump(MSG_DEBUG, "FT: Generated ANonce",
846 sm->ANonce, WPA_NONCE_LEN);
847
1b484d60 848 ptk_len = pairwise != WPA_CIPHER_CCMP ? 64 : 48;
6fc6879b
JM		 849 wpa_pmk_r1_to_ptk(pmk_r1, sm->SNonce, sm->ANonce, sm->addr,
850 sm->wpa_auth->addr, pmk_r1_name,
c0a61908 851 (u8 *) &sm->PTK, ptk_len, ptk_name);
6fc6879b 852 wpa_hexdump_key(MSG_DEBUG, "FT: PTK",
c0a61908 853 (u8 *) &sm->PTK, ptk_len);
6fc6879b
JM		 854 wpa_hexdump(MSG_DEBUG, "FT: PTKName", ptk_name, WPA_PMK_NAME_LEN);
855
0e84c254 856 sm->pairwise = pairwise;
6fc6879b
JM		 857 wpa_ft_install_ptk(sm);
858
859 buflen = 2 + sizeof(struct rsn_mdie) + 2 + sizeof(struct rsn_ftie) +
860 2 + FT_R1KH_ID_LEN + 200;
861 *resp_ies = os_zalloc(buflen);
862 if (*resp_ies == NULL) {
863 return WLAN_STATUS_UNSPECIFIED_FAILURE;
864 }
865
866 pos = *resp_ies;
867 end = *resp_ies + buflen;
868
869 ret = wpa_write_rsn_ie(conf, pos, end - pos, parse.rsn_pmkid);
870 if (ret < 0) {
871 os_free(*resp_ies);
872 *resp_ies = NULL;
873 return WLAN_STATUS_UNSPECIFIED_FAILURE;
874 }
875 pos += ret;
876
877 ret = wpa_write_mdie(conf, pos, end - pos);
878 if (ret < 0) {
879 os_free(*resp_ies);
880 *resp_ies = NULL;
881 return WLAN_STATUS_UNSPECIFIED_FAILURE;
882 }
883 pos += ret;
884
885 ret = wpa_write_ftie(conf, parse.r0kh_id, parse.r0kh_id_len,
886 sm->ANonce, sm->SNonce, pos, end - pos, NULL, 0);
887 if (ret < 0) {
888 os_free(*resp_ies);
889 *resp_ies = NULL;
890 return WLAN_STATUS_UNSPECIFIED_FAILURE;
891 }
892 pos += ret;
893
894 *resp_ies_len = pos - *resp_ies;
895
896 return WLAN_STATUS_SUCCESS;
897}
898
899
900void wpa_ft_process_auth(struct wpa_state_machine *sm, const u8 *bssid,
901 u16 auth_transaction, const u8 *ies, size_t ies_len,
902 void (*cb)(void *ctx, const u8 *dst, const u8 *bssid,
903 u16 auth_transaction, u16 status,
904 const u8 *ies, size_t ies_len),
905 void *ctx)
906{
907 u16 status;
908 u8 *resp_ies;
909 size_t resp_ies_len;
910
911 if (sm == NULL) {
912 wpa_printf(MSG_DEBUG, "FT: Received authentication frame, but "
913 "WPA SM not available");
914 return;
915 }
916
917 wpa_printf(MSG_DEBUG, "FT: Received authentication frame: STA=" MACSTR
918 " BSSID=" MACSTR " transaction=%d",
919 MAC2STR(sm->addr), MAC2STR(bssid), auth_transaction);
920 status = wpa_ft_process_auth_req(sm, ies, ies_len, &resp_ies,
921 &resp_ies_len);
922
923 wpa_printf(MSG_DEBUG, "FT: FT authentication response: dst=" MACSTR
924 " auth_transaction=%d status=%d",
925 MAC2STR(sm->addr), auth_transaction + 1, status);
926 wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len);
927 cb(ctx, sm->addr, bssid, auth_transaction + 1, status,
928 resp_ies, resp_ies_len);
929 os_free(resp_ies);
930}
931
932
933u16 wpa_ft_validate_reassoc(struct wpa_state_machine *sm, const u8 *ies,
934 size_t ies_len)
935{
936 struct wpa_ft_ies parse;
937 struct rsn_mdie *mdie;
938 struct rsn_ftie *ftie;
939 u8 mic[16];
8aaf894d 940 unsigned int count;
6fc6879b
JM		 941
942 if (sm == NULL)
943 return WLAN_STATUS_UNSPECIFIED_FAILURE;
944
945 wpa_hexdump(MSG_DEBUG, "FT: Reassoc Req IEs", ies, ies_len);
946
947 if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) {
948 wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs");
949 return WLAN_STATUS_UNSPECIFIED_FAILURE;
950 }
951
952 if (parse.rsn == NULL) {
953 wpa_printf(MSG_DEBUG, "FT: No RSNIE in Reassoc Req");
954 return WLAN_STATUS_UNSPECIFIED_FAILURE;
955 }
956
957 if (parse.rsn_pmkid == NULL) {
958 wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE");
959 return WLAN_STATUS_INVALID_PMKID;
960 }
961
962 if (os_memcmp(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN) != 0)
963 {
964 wpa_printf(MSG_DEBUG, "FT: PMKID in Reassoc Req did not match "
965 "with the PMKR1Name derived from auth request");
966 return WLAN_STATUS_INVALID_PMKID;
967 }
968
969 mdie = (struct rsn_mdie *) parse.mdie;
970 if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
971 os_memcmp(mdie->mobility_domain,
972 sm->wpa_auth->conf.mobility_domain,
973 MOBILITY_DOMAIN_ID_LEN) != 0) {
974 wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
975 return WLAN_STATUS_INVALID_MDIE;
976 }
977
978 ftie = (struct rsn_ftie *) parse.ftie;
979 if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
980 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
981 return WLAN_STATUS_INVALID_FTIE;
982 }
983
0ae145cd
JM		 984 if (os_memcmp(ftie->snonce, sm->SNonce, WPA_NONCE_LEN) != 0) {
985 wpa_printf(MSG_DEBUG, "FT: SNonce mismatch in FTIE");
986 wpa_hexdump(MSG_DEBUG, "FT: Received SNonce",
987 ftie->snonce, WPA_NONCE_LEN);
988 wpa_hexdump(MSG_DEBUG, "FT: Expected SNonce",
989 sm->SNonce, WPA_NONCE_LEN);
990 return -1;
991 }
992
993 if (os_memcmp(ftie->anonce, sm->ANonce, WPA_NONCE_LEN) != 0) {
994 wpa_printf(MSG_DEBUG, "FT: ANonce mismatch in FTIE");
995 wpa_hexdump(MSG_DEBUG, "FT: Received ANonce",
996 ftie->anonce, WPA_NONCE_LEN);
997 wpa_hexdump(MSG_DEBUG, "FT: Expected ANonce",
998 sm->ANonce, WPA_NONCE_LEN);
999 return -1;
1000 }
1001
1002
1003 if (parse.r0kh_id == NULL) {
1004 wpa_printf(MSG_DEBUG, "FT: No R0KH-ID subelem in FTIE");
1005 return -1;
1006 }
1007
1008 if (parse.r0kh_id_len != sm->r0kh_id_len ||
1009 os_memcmp(parse.r0kh_id, sm->r0kh_id, parse.r0kh_id_len) != 0) {
1010 wpa_printf(MSG_DEBUG, "FT: R0KH-ID in FTIE did not match with "
1011 "the current R0KH-ID");
1012 wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID in FTIE",
1013 parse.r0kh_id, parse.r0kh_id_len);
1014 wpa_hexdump(MSG_DEBUG, "FT: The current R0KH-ID",
1015 sm->r0kh_id, sm->r0kh_id_len);
1016 return -1;
1017 }
1018
1019 if (parse.r1kh_id == NULL) {
1020 wpa_printf(MSG_DEBUG, "FT: No R1KH-ID subelem in FTIE");
1021 return -1;
1022 }
1023
1024 if (os_memcmp(parse.r1kh_id, sm->wpa_auth->conf.r1_key_holder,
1025 FT_R1KH_ID_LEN) != 0) {
1026 wpa_printf(MSG_DEBUG, "FT: Unknown R1KH-ID used in "
1027 "ReassocReq");
1028 wpa_hexdump(MSG_DEBUG, "FT: R1KH-ID in FTIE",
1029 parse.r1kh_id, FT_R1KH_ID_LEN);
1030 wpa_hexdump(MSG_DEBUG, "FT: Expected R1KH-ID",
1031 sm->wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN);
1032 return -1;
1033 }
1034
1035 if (parse.rsn_pmkid == NULL ||
1036 os_memcmp(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN)) {
1037 wpa_printf(MSG_DEBUG, "FT: No matching PMKR1Name (PMKID) in "
1038 "RSNIE (pmkid=%d)", !!parse.rsn_pmkid);
1039 return -1;
1040 }
1041
8aaf894d
JM		 1042 count = 3;
1043 if (parse.ric)
c284b461 1044 count += ieee802_11_ie_count(parse.ric, parse.ric_len);
8aaf894d
JM		 1045 if (ftie->mic_control[1] != count) {
1046 wpa_printf(MSG_DEBUG, "FT: Unexpected IE count in MIC "
1047 "Control: received %u expected %u",
1048 ftie->mic_control[1], count);
1049 return -1;
1050 }
1051
6fc6879b
JM		 1052 if (wpa_ft_mic(sm->PTK.kck, sm->addr, sm->wpa_auth->addr, 5,
1053 parse.mdie - 2, parse.mdie_len + 2,
1054 parse.ftie - 2, parse.ftie_len + 2,
babfbf15
JM		 1055 parse.rsn - 2, parse.rsn_len + 2,
1056 parse.ric, parse.ric_len,
6fc6879b
JM		 1057 mic) < 0) {
1058 wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC");
1059 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1060 }
1061
1062 if (os_memcmp(mic, ftie->mic, 16) != 0) {
1063 wpa_printf(MSG_DEBUG, "FT: Invalid MIC in FTIE");
1064 wpa_hexdump(MSG_MSGDUMP, "FT: Received MIC", ftie->mic, 16);
1065 wpa_hexdump(MSG_MSGDUMP, "FT: Calculated MIC", mic, 16);
1066 return WLAN_STATUS_INVALID_FTIE;
1067 }
1068
1069 return WLAN_STATUS_SUCCESS;
1070}
1071
1072
1073int wpa_ft_action_rx(struct wpa_state_machine *sm, const u8 *data, size_t len)
1074{
1075 const u8 *sta_addr, *target_ap;
1076 const u8 *ies;
1077 size_t ies_len;
1078 u8 action;
1079 struct ft_rrb_frame *frame;
1080
1081 if (sm == NULL)
1082 return -1;
1083
1084 /*
1085 * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6]
1086 * FT Request action frame body[variable]
1087 */
1088
1089 if (len < 14) {
1090 wpa_printf(MSG_DEBUG, "FT: Too short FT Action frame "
1091 "(len=%lu)", (unsigned long) len);
1092 return -1;
1093 }
1094
1095 action = data[1];
1096 sta_addr = data + 2;
1097 target_ap = data + 8;
1098 ies = data + 14;
1099 ies_len = len - 14;
1100
1101 wpa_printf(MSG_DEBUG, "FT: Received FT Action frame (STA=" MACSTR
1102 " Target AP=" MACSTR " Action=%d)",
1103 MAC2STR(sta_addr), MAC2STR(target_ap), action);
1104
1105 if (os_memcmp(sta_addr, sm->addr, ETH_ALEN) != 0) {
1106 wpa_printf(MSG_DEBUG, "FT: Mismatch in FT Action STA address: "
1107 "STA=" MACSTR " STA-Address=" MACSTR,
1108 MAC2STR(sm->addr), MAC2STR(sta_addr));
1109 return -1;
1110 }
1111
1112 /*
1113 * Do some sanity checking on the target AP address (not own and not
1114 * broadcast. This could be extended to filter based on a list of known
1115 * APs in the MD (if such a list were configured).
1116 */
1117 if ((target_ap[0] & 0x01) ||
1118 os_memcmp(target_ap, sm->wpa_auth->addr, ETH_ALEN) == 0) {
1119 wpa_printf(MSG_DEBUG, "FT: Invalid Target AP in FT Action "
1120 "frame");
1121 return -1;
1122 }
1123
1124 wpa_hexdump(MSG_MSGDUMP, "FT: Action frame body", ies, ies_len);
1125
1126 /* RRB - Forward action frame to the target AP */
1127 frame = os_malloc(sizeof(*frame) + len);
1128 frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1129 frame->packet_type = FT_PACKET_REQUEST;
1130 frame->action_length = host_to_le16(len);
1131 os_memcpy(frame->ap_address, sm->wpa_auth->addr, ETH_ALEN);
1132 os_memcpy(frame + 1, data, len);
1133
1134 wpa_ft_rrb_send(sm->wpa_auth, target_ap, (u8 *) frame,
1135 sizeof(*frame) + len);
1136 os_free(frame);
1137
1138 return 0;
1139}
1140
1141
1142static int wpa_ft_rrb_rx_request(struct wpa_authenticator *wpa_auth,
1143 const u8 *current_ap, const u8 *sta_addr,
1144 const u8 *body, size_t len)
1145{
1146 struct wpa_state_machine *sm;
1147 u16 status;
1148 u8 *resp_ies, *pos;
1149 size_t resp_ies_len, rlen;
1150 struct ft_rrb_frame *frame;
1151
1152 sm = wpa_ft_add_sta(wpa_auth, sta_addr);
1153 if (sm == NULL) {
1154 wpa_printf(MSG_DEBUG, "FT: Failed to add new STA based on "
1155 "RRB Request");
1156 return -1;
1157 }
1158
1159 wpa_hexdump(MSG_MSGDUMP, "FT: RRB Request Frame body", body, len);
1160
1161 status = wpa_ft_process_auth_req(sm, body, len, &resp_ies,
1162 &resp_ies_len);
1163
1164 wpa_printf(MSG_DEBUG, "FT: RRB authentication response: STA=" MACSTR
1165 " CurrentAP=" MACSTR " status=%d",
1166 MAC2STR(sm->addr), MAC2STR(current_ap), status);
1167 wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len);
1168
1169 /* RRB - Forward action frame response to the Current AP */
1170
1171 /*
1172 * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6]
1173 * Status_Code[2] FT Request action frame body[variable]
1174 */
1175 rlen = 2 + 2 * ETH_ALEN + 2 + resp_ies_len;
1176
1177 frame = os_malloc(sizeof(*frame) + rlen);
1178 frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1179 frame->packet_type = FT_PACKET_RESPONSE;
1180 frame->action_length = host_to_le16(rlen);
1181 os_memcpy(frame->ap_address, wpa_auth->addr, ETH_ALEN);
1182 pos = (u8 *) (frame + 1);
1183 *pos++ = WLAN_ACTION_FT;
1184 *pos++ = 2; /* Action: Response */
1185 os_memcpy(pos, sta_addr, ETH_ALEN);
1186 pos += ETH_ALEN;
1187 os_memcpy(pos, wpa_auth->addr, ETH_ALEN);
1188 pos += ETH_ALEN;
1189 WPA_PUT_LE16(pos, status);
1190 pos += 2;
1191 if (resp_ies) {
1192 os_memcpy(pos, resp_ies, resp_ies_len);
1193 os_free(resp_ies);
1194 }
1195
1196 wpa_ft_rrb_send(wpa_auth, current_ap, (u8 *) frame,
1197 sizeof(*frame) + rlen);
1198 os_free(frame);
1199
1200 return 0;
1201}
1202
1203
1204static int wpa_ft_rrb_rx_pull(struct wpa_authenticator *wpa_auth,
1205 const u8 *src_addr,
1206 const u8 *data, size_t data_len)
1207{
1208 struct ft_r0kh_r1kh_pull_frame *frame, f;
1209 struct ft_remote_r1kh *r1kh;
1210 struct ft_r0kh_r1kh_resp_frame resp, r;
1211 u8 pmk_r0[PMK_LEN];
1b484d60 1212 int pairwise;
6fc6879b
JM		 1213
1214 wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull");
1215
1216 if (data_len < sizeof(*frame))
1217 return -1;
1218
1219 r1kh = wpa_auth->conf.r1kh_list;
1220 while (r1kh) {
1221 if (os_memcmp(r1kh->addr, src_addr, ETH_ALEN) == 0)
1222 break;
1223 r1kh = r1kh->next;
1224 }
1225 if (r1kh == NULL) {
1226 wpa_printf(MSG_DEBUG, "FT: No matching R1KH address found for "
1227 "PMK-R1 pull source address " MACSTR,
1228 MAC2STR(src_addr));
1229 return -1;
1230 }
1231
1232 frame = (struct ft_r0kh_r1kh_pull_frame *) data;
1233 /* aes_unwrap() does not support inplace decryption, so use a temporary
1234 * buffer for the data. */
1235 if (aes_unwrap(r1kh->key, (FT_R0KH_R1KH_PULL_DATA_LEN + 7) / 8,
1236 frame->nonce, f.nonce) < 0) {
1237 wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 pull "
1238 "request from " MACSTR, MAC2STR(src_addr));
1239 return -1;
1240 }
1241
1242 wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - nonce",
1243 f.nonce, sizeof(f.nonce));
1244 wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - PMKR0Name",
1245 f.pmk_r0_name, WPA_PMK_NAME_LEN);
1246 wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull - R1KH-ID=" MACSTR "S1KH-ID="
1247 MACSTR, MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id));
1248
1249 os_memset(&resp, 0, sizeof(resp));
1250 resp.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1251 resp.packet_type = FT_PACKET_R0KH_R1KH_RESP;
1252 resp.data_length = host_to_le16(FT_R0KH_R1KH_RESP_DATA_LEN);
1253 os_memcpy(resp.ap_address, wpa_auth->addr, ETH_ALEN);
1254
1255 /* aes_wrap() does not support inplace encryption, so use a temporary
1256 * buffer for the data. */
1257 os_memcpy(r.nonce, f.nonce, sizeof(f.nonce));
1258 os_memcpy(r.r1kh_id, f.r1kh_id, FT_R1KH_ID_LEN);
1259 os_memcpy(r.s1kh_id, f.s1kh_id, ETH_ALEN);
1b484d60
JM		 1260 if (wpa_ft_fetch_pmk_r0(wpa_auth, f.s1kh_id, f.pmk_r0_name, pmk_r0,
1261 &pairwise) < 0) {
6fc6879b
JM		 1262 wpa_printf(MSG_DEBUG, "FT: No matching PMKR0Name found for "
1263 "PMK-R1 pull");
1264 return -1;
1265 }
1266
1267 wpa_derive_pmk_r1(pmk_r0, f.pmk_r0_name, f.r1kh_id, f.s1kh_id,
1268 r.pmk_r1, r.pmk_r1_name);
1269 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", r.pmk_r1, PMK_LEN);
1270 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", r.pmk_r1_name,
1271 WPA_PMK_NAME_LEN);
e9501a07 1272 r.pairwise = host_to_le16(pairwise);
6fc6879b
JM		 1273
1274 if (aes_wrap(r1kh->key, (FT_R0KH_R1KH_RESP_DATA_LEN + 7) / 8,
1275 r.nonce, resp.nonce) < 0) {
1276 os_memset(pmk_r0, 0, PMK_LEN);
1277 return -1;
1278 }
1279
1280 os_memset(pmk_r0, 0, PMK_LEN);
1281
1282 wpa_ft_rrb_send(wpa_auth, src_addr, (u8 *) &resp, sizeof(resp));
1283
1284 return 0;
1285}
1286
1287
1288static int wpa_ft_rrb_rx_resp(struct wpa_authenticator *wpa_auth,
1289 const u8 *src_addr,
1290 const u8 *data, size_t data_len)
1291{
1292 struct ft_r0kh_r1kh_resp_frame *frame, f;
1293 struct ft_remote_r0kh *r0kh;
1b484d60 1294 int pairwise;
6fc6879b
JM		 1295
1296 wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull response");
1297
1298 if (data_len < sizeof(*frame))
1299 return -1;
1300
1301 r0kh = wpa_auth->conf.r0kh_list;
1302 while (r0kh) {
1303 if (os_memcmp(r0kh->addr, src_addr, ETH_ALEN) == 0)
1304 break;
1305 r0kh = r0kh->next;
1306 }
1307 if (r0kh == NULL) {
1308 wpa_printf(MSG_DEBUG, "FT: No matching R0KH address found for "
1309 "PMK-R0 pull response source address " MACSTR,
1310 MAC2STR(src_addr));
1311 return -1;
1312 }
1313
1314 frame = (struct ft_r0kh_r1kh_resp_frame *) data;
1315 /* aes_unwrap() does not support inplace decryption, so use a temporary
1316 * buffer for the data. */
1317 if (aes_unwrap(r0kh->key, (FT_R0KH_R1KH_RESP_DATA_LEN + 7) / 8,
1318 frame->nonce, f.nonce) < 0) {
1319 wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 pull "
1320 "response from " MACSTR, MAC2STR(src_addr));
1321 return -1;
1322 }
1323
1324 if (os_memcmp(f.r1kh_id, wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN)
1325 != 0) {
1326 wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull response did not use a "
1327 "matching R1KH-ID");
1328 return -1;
1329 }
1330
1331 /* TODO: verify that <nonce,s1kh_id> matches with a pending request
1332 * and call this requests callback function to finish request
1333 * processing */
1334
1b484d60 1335 pairwise = le_to_host16(f.pairwise);
6fc6879b
JM		 1336 wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - nonce",
1337 f.nonce, sizeof(f.nonce));
1338 wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull - R1KH-ID=" MACSTR "S1KH-ID="
1b484d60
JM		 1339 MACSTR " pairwise=0x%x",
1340 MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id), pairwise);
6fc6879b
JM		 1341 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1 pull - PMK-R1",
1342 f.pmk_r1, PMK_LEN);
1343 wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - PMKR1Name",
1344 f.pmk_r1_name, WPA_PMK_NAME_LEN);
1345
1b484d60
JM		 1346 wpa_ft_store_pmk_r1(wpa_auth, f.s1kh_id, f.pmk_r1, f.pmk_r1_name,
1347 pairwise);
6fc6879b
JM		 1348 os_memset(f.pmk_r1, 0, PMK_LEN);
1349
1350 return 0;
1351}
1352
1353
1354static int wpa_ft_rrb_rx_push(struct wpa_authenticator *wpa_auth,
1355 const u8 *src_addr,
1356 const u8 *data, size_t data_len)
1357{
1358 struct ft_r0kh_r1kh_push_frame *frame, f;
1359 struct ft_remote_r0kh *r0kh;
1360 struct os_time now;
1361 os_time_t tsend;
1b484d60 1362 int pairwise;
6fc6879b
JM		 1363
1364 wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 push");
1365
1366 if (data_len < sizeof(*frame))
1367 return -1;
1368
1369 r0kh = wpa_auth->conf.r0kh_list;
1370 while (r0kh) {
1371 if (os_memcmp(r0kh->addr, src_addr, ETH_ALEN) == 0)
1372 break;
1373 r0kh = r0kh->next;
1374 }
1375 if (r0kh == NULL) {
1376 wpa_printf(MSG_DEBUG, "FT: No matching R0KH address found for "
1377 "PMK-R0 push source address " MACSTR,
1378 MAC2STR(src_addr));
1379 return -1;
1380 }
1381
1382 frame = (struct ft_r0kh_r1kh_push_frame *) data;
1383 /* aes_unwrap() does not support inplace decryption, so use a temporary
1384 * buffer for the data. */
1385 if (aes_unwrap(r0kh->key, (FT_R0KH_R1KH_PUSH_DATA_LEN + 7) / 8,
1386 frame->timestamp, f.timestamp) < 0) {
1387 wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 push from "
1388 MACSTR, MAC2STR(src_addr));
1389 return -1;
1390 }
1391
1392 os_get_time(&now);
1393 tsend = WPA_GET_LE32(f.timestamp);
1394 if ((now.sec > tsend && now.sec - tsend > 60) ||
1395 (now.sec < tsend && tsend - now.sec > 60)) {
1396 wpa_printf(MSG_DEBUG, "FT: PMK-R1 push did not have a valid "
1397 "timestamp: sender time %d own time %d\n",
1398 (int) tsend, (int) now.sec);
1399 return -1;
1400 }
1401
1402 if (os_memcmp(f.r1kh_id, wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN)
1403 != 0) {
1404 wpa_printf(MSG_DEBUG, "FT: PMK-R1 push did not use a matching "
1405 "R1KH-ID (received " MACSTR " own " MACSTR ")",
1406 MAC2STR(f.r1kh_id),
1407 MAC2STR(wpa_auth->conf.r1_key_holder));
1408 return -1;
1409 }
1410
1b484d60 1411 pairwise = le_to_host16(f.pairwise);
6fc6879b 1412 wpa_printf(MSG_DEBUG, "FT: PMK-R1 push - R1KH-ID=" MACSTR " S1KH-ID="
1b484d60
JM		 1413 MACSTR " pairwise=0x%x",
1414 MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id), pairwise);
6fc6879b
JM		 1415 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1 push - PMK-R1",
1416 f.pmk_r1, PMK_LEN);
1417 wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 push - PMKR1Name",
1418 f.pmk_r1_name, WPA_PMK_NAME_LEN);
1419
1b484d60
JM		 1420 wpa_ft_store_pmk_r1(wpa_auth, f.s1kh_id, f.pmk_r1, f.pmk_r1_name,
1421 pairwise);
6fc6879b
JM		 1422 os_memset(f.pmk_r1, 0, PMK_LEN);
1423
1424 return 0;
1425}
1426
1427
1428int wpa_ft_rrb_rx(struct wpa_authenticator *wpa_auth, const u8 *src_addr,
1429 const u8 *data, size_t data_len)
1430{
1431 struct ft_rrb_frame *frame;
1432 u16 alen;
1433 const u8 *pos, *end, *start;
1434 u8 action;
1435 const u8 *sta_addr, *target_ap_addr;
1436
1437 wpa_printf(MSG_DEBUG, "FT: RRB received frame from remote AP " MACSTR,
1438 MAC2STR(src_addr));
1439
1440 if (data_len < sizeof(*frame)) {
1441 wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (data_len=%lu)",
1442 (unsigned long) data_len);
1443 return -1;
1444 }
1445
1446 pos = data;
1447 frame = (struct ft_rrb_frame *) pos;
1448 pos += sizeof(*frame);
1449
1450 alen = le_to_host16(frame->action_length);
1451 wpa_printf(MSG_DEBUG, "FT: RRB frame - frame_type=%d packet_type=%d "
1452 "action_length=%d ap_address=" MACSTR,
1453 frame->frame_type, frame->packet_type, alen,
1454 MAC2STR(frame->ap_address));
1455
1456 if (frame->frame_type != RSN_REMOTE_FRAME_TYPE_FT_RRB) {
c1e033b0 1457 /* Discard frame per IEEE Std 802.11r-2008, 11A.10.3 */
6fc6879b
JM		 1458 wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with "
1459 "unrecognized type %d", frame->frame_type);
1460 return -1;
1461 }
1462
1463 if (alen > data_len - sizeof(*frame)) {
1464 wpa_printf(MSG_DEBUG, "FT: RRB frame too short for action "
1465 "frame");
1466 return -1;
1467 }
1468
1469 if (frame->packet_type == FT_PACKET_R0KH_R1KH_PULL)
1470 return wpa_ft_rrb_rx_pull(wpa_auth, src_addr, data, data_len);
1471 if (frame->packet_type == FT_PACKET_R0KH_R1KH_RESP)
1472 return wpa_ft_rrb_rx_resp(wpa_auth, src_addr, data, data_len);
1473 if (frame->packet_type == FT_PACKET_R0KH_R1KH_PUSH)
1474 return wpa_ft_rrb_rx_push(wpa_auth, src_addr, data, data_len);
1475
1476 wpa_hexdump(MSG_MSGDUMP, "FT: RRB - FT Action frame", pos, alen);
1477
1478 if (alen < 1 + 1 + 2 * ETH_ALEN) {
1479 wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (not enough "
1480 "room for Action Frame body); alen=%lu",
1481 (unsigned long) alen);
1482 return -1;
1483 }
1484 start = pos;
1485 end = pos + alen;
1486
1487 if (*pos != WLAN_ACTION_FT) {
1488 wpa_printf(MSG_DEBUG, "FT: Unexpected Action frame category "
1489 "%d", *pos);
1490 return -1;
1491 }
1492
1493 pos++;
1494 action = *pos++;
1495 sta_addr = pos;
1496 pos += ETH_ALEN;
1497 target_ap_addr = pos;
1498 pos += ETH_ALEN;
1499 wpa_printf(MSG_DEBUG, "FT: RRB Action Frame: action=%d sta_addr="
1500 MACSTR " target_ap_addr=" MACSTR,
1501 action, MAC2STR(sta_addr), MAC2STR(target_ap_addr));
1502
1503 if (frame->packet_type == FT_PACKET_REQUEST) {
1504 wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Request");
1505
1506 if (action != 1) {
1507 wpa_printf(MSG_DEBUG, "FT: Unexpected Action %d in "
1508 "RRB Request", action);
1509 return -1;
1510 }
1511
1512 if (os_memcmp(target_ap_addr, wpa_auth->addr, ETH_ALEN) != 0) {
1513 wpa_printf(MSG_DEBUG, "FT: Target AP address in the "
1514 "RRB Request does not match with own "
1515 "address");
1516 return -1;
1517 }
1518
1519 if (wpa_ft_rrb_rx_request(wpa_auth, frame->ap_address,
1520 sta_addr, pos, end - pos) < 0)
1521 return -1;
1522 } else if (frame->packet_type == FT_PACKET_RESPONSE) {
1523 u16 status_code;
1524
1525 if (end - pos < 2) {
1526 wpa_printf(MSG_DEBUG, "FT: Not enough room for status "
1527 "code in RRB Response");
1528 return -1;
1529 }
1530 status_code = WPA_GET_LE16(pos);
1531 pos += 2;
1532
1533 wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Response "
1534 "(status_code=%d)", status_code);
1535
1536 if (wpa_ft_action_send(wpa_auth, sta_addr, start, alen) < 0)
1537 return -1;
1538 } else {
1539 wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with unknown "
1540 "packet_type %d", frame->packet_type);
1541 return -1;
1542 }
1543
1544 return 0;
1545}
1546
1547
1548static void wpa_ft_generate_pmk_r1(struct wpa_authenticator *wpa_auth,
1549 struct wpa_ft_pmk_r0_sa *pmk_r0,
1550 struct ft_remote_r1kh *r1kh,
1b484d60 1551 const u8 *s1kh_id, int pairwise)
6fc6879b
JM		 1552{
1553 struct ft_r0kh_r1kh_push_frame frame, f;
1554 struct os_time now;
1555
1556 os_memset(&frame, 0, sizeof(frame));
1557 frame.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1558 frame.packet_type = FT_PACKET_R0KH_R1KH_PUSH;
1559 frame.data_length = host_to_le16(FT_R0KH_R1KH_PUSH_DATA_LEN);
1560 os_memcpy(frame.ap_address, wpa_auth->addr, ETH_ALEN);
1561
1562 /* aes_wrap() does not support inplace encryption, so use a temporary
1563 * buffer for the data. */
1564 os_memcpy(f.r1kh_id, r1kh->id, FT_R1KH_ID_LEN);
1565 os_memcpy(f.s1kh_id, s1kh_id, ETH_ALEN);
1566 os_memcpy(f.pmk_r0_name, pmk_r0->pmk_r0_name, WPA_PMK_NAME_LEN);
1567 wpa_derive_pmk_r1(pmk_r0->pmk_r0, pmk_r0->pmk_r0_name, r1kh->id,
1568 s1kh_id, f.pmk_r1, f.pmk_r1_name);
1569 wpa_printf(MSG_DEBUG, "FT: R1KH-ID " MACSTR, MAC2STR(r1kh->id));
1570 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", f.pmk_r1, PMK_LEN);
1571 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", f.pmk_r1_name,
1572 WPA_PMK_NAME_LEN);
1573 os_get_time(&now);
1574 WPA_PUT_LE32(f.timestamp, now.sec);
e9501a07 1575 f.pairwise = host_to_le16(pairwise);
6fc6879b
JM		 1576 if (aes_wrap(r1kh->key, (FT_R0KH_R1KH_PUSH_DATA_LEN + 7) / 8,
1577 f.timestamp, frame.timestamp) < 0)
1578 return;
1579
1580 wpa_ft_rrb_send(wpa_auth, r1kh->addr, (u8 *) &frame, sizeof(frame));
1581}
1582
1583
1584void wpa_ft_push_pmk_r1(struct wpa_authenticator *wpa_auth, const u8 *addr)
1585{
1586 struct wpa_ft_pmk_r0_sa *r0;
1587 struct ft_remote_r1kh *r1kh;
1588
1589 if (!wpa_auth->conf.pmk_r1_push)
1590 return;
1591
1592 r0 = wpa_auth->ft_pmk_cache->pmk_r0;
1593 while (r0) {
1594 if (os_memcmp(r0->spa, addr, ETH_ALEN) == 0)
1595 break;
1596 r0 = r0->next;
1597 }
1598
1599 if (r0 == NULL || r0->pmk_r1_pushed)
1600 return;
1601 r0->pmk_r1_pushed = 1;
1602
1603 wpa_printf(MSG_DEBUG, "FT: Deriving and pushing PMK-R1 keys to R1KHs "
1604 "for STA " MACSTR, MAC2STR(addr));
1605
1606 r1kh = wpa_auth->conf.r1kh_list;
1607 while (r1kh) {
1b484d60 1608 wpa_ft_generate_pmk_r1(wpa_auth, r0, r1kh, addr, r0->pairwise);
6fc6879b
JM		 1609 r1kh = r1kh->next;
1610 }
1611}
1612
1613#endif /* CONFIG_IEEE80211R */
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