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RSN supplicant: Use os_memcmp_const() for hash/password comparisons
[thirdparty/hostap.git] / src / ap / wpa_auth_ft.c
CommitLineData
6fc6879b
JM		 1/*
2 * hostapd - IEEE 802.11r - Fast BSS Transition
692ec305 3 * Copyright (c) 2004-2014, 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"
692ec305 12#include "utils/eloop.h"
81f4f619
JM		 13#include "common/ieee802_11_defs.h"
14#include "common/ieee802_11_common.h"
03da66bd 15#include "crypto/aes_wrap.h"
3642c431 16#include "crypto/random.h"
6226e38d 17#include "ap_config.h"
6fc6879b 18#include "ieee802_11.h"
1057d78e 19#include "wmm.h"
6226e38d 20#include "wpa_auth.h"
6fc6879b 21#include "wpa_auth_i.h"
6fc6879b
JM		 22
23
24#ifdef CONFIG_IEEE80211R
25
692ec305
JM		 26static int wpa_ft_send_rrb_auth_resp(struct wpa_state_machine *sm,
27 const u8 *current_ap, const u8 *sta_addr,
28 u16 status, const u8 *resp_ies,
29 size_t resp_ies_len);
30
31
6fc6879b
JM		 32static int wpa_ft_rrb_send(struct wpa_authenticator *wpa_auth, const u8 *dst,
33 const u8 *data, size_t data_len)
34{
35 if (wpa_auth->cb.send_ether == NULL)
36 return -1;
67ccef7e 37 wpa_printf(MSG_DEBUG, "FT: RRB send to " MACSTR, MAC2STR(dst));
6fc6879b
JM		 38 return wpa_auth->cb.send_ether(wpa_auth->cb.ctx, dst, ETH_P_RRB,
39 data, data_len);
40}
41
42
43static int wpa_ft_action_send(struct wpa_authenticator *wpa_auth,
44 const u8 *dst, const u8 *data, size_t data_len)
45{
46 if (wpa_auth->cb.send_ft_action == NULL)
47 return -1;
48 return wpa_auth->cb.send_ft_action(wpa_auth->cb.ctx, dst,
49 data, data_len);
50}
51
52
53static struct wpa_state_machine *
54wpa_ft_add_sta(struct wpa_authenticator *wpa_auth, const u8 *sta_addr)
55{
56 if (wpa_auth->cb.add_sta == NULL)
57 return NULL;
58 return wpa_auth->cb.add_sta(wpa_auth->cb.ctx, sta_addr);
59}
60
61
88b32a99
SP		 62static int wpa_ft_add_tspec(struct wpa_authenticator *wpa_auth,
63 const u8 *sta_addr,
64 u8 *tspec_ie, size_t tspec_ielen)
65{
66 if (wpa_auth->cb.add_tspec == NULL) {
006309b5 67 wpa_printf(MSG_DEBUG, "FT: add_tspec is not initialized");
88b32a99
SP		 68 return -1;
69 }
70 return wpa_auth->cb.add_tspec(wpa_auth->cb.ctx, sta_addr, tspec_ie,
71 tspec_ielen);
72}
73
74
6fc6879b
JM		 75int wpa_write_mdie(struct wpa_auth_config *conf, u8 *buf, size_t len)
76{
77 u8 *pos = buf;
78 u8 capab;
79 if (len < 2 + sizeof(struct rsn_mdie))
80 return -1;
81
82 *pos++ = WLAN_EID_MOBILITY_DOMAIN;
83 *pos++ = MOBILITY_DOMAIN_ID_LEN + 1;
84 os_memcpy(pos, conf->mobility_domain, MOBILITY_DOMAIN_ID_LEN);
85 pos += MOBILITY_DOMAIN_ID_LEN;
d7956add
SP		 86 capab = 0;
87 if (conf->ft_over_ds)
88 capab |= RSN_FT_CAPAB_FT_OVER_DS;
6fc6879b
JM		 89 *pos++ = capab;
90
91 return pos - buf;
92}
93
94
86dfabb8
JM		 95int wpa_write_ftie(struct wpa_auth_config *conf, const u8 *r0kh_id,
96 size_t r0kh_id_len,
97 const u8 *anonce, const u8 *snonce,
98 u8 *buf, size_t len, const u8 *subelem,
99 size_t subelem_len)
6fc6879b
JM		 100{
101 u8 *pos = buf, *ielen;
102 struct rsn_ftie *hdr;
103
104 if (len < 2 + sizeof(*hdr) + 2 + FT_R1KH_ID_LEN + 2 + r0kh_id_len +
105 subelem_len)
106 return -1;
107
108 *pos++ = WLAN_EID_FAST_BSS_TRANSITION;
109 ielen = pos++;
110
111 hdr = (struct rsn_ftie *) pos;
112 os_memset(hdr, 0, sizeof(*hdr));
113 pos += sizeof(*hdr);
114 WPA_PUT_LE16(hdr->mic_control, 0);
115 if (anonce)
116 os_memcpy(hdr->anonce, anonce, WPA_NONCE_LEN);
117 if (snonce)
118 os_memcpy(hdr->snonce, snonce, WPA_NONCE_LEN);
119
120 /* Optional Parameters */
121 *pos++ = FTIE_SUBELEM_R1KH_ID;
122 *pos++ = FT_R1KH_ID_LEN;
123 os_memcpy(pos, conf->r1_key_holder, FT_R1KH_ID_LEN);
124 pos += FT_R1KH_ID_LEN;
125
126 if (r0kh_id) {
127 *pos++ = FTIE_SUBELEM_R0KH_ID;
128 *pos++ = r0kh_id_len;
129 os_memcpy(pos, r0kh_id, r0kh_id_len);
130 pos += r0kh_id_len;
131 }
132
133 if (subelem) {
134 os_memcpy(pos, subelem, subelem_len);
135 pos += subelem_len;
136 }
137
138 *ielen = pos - buf - 2;
139
140 return pos - buf;
141}
142
143
144struct wpa_ft_pmk_r0_sa {
145 struct wpa_ft_pmk_r0_sa *next;
146 u8 pmk_r0[PMK_LEN];
147 u8 pmk_r0_name[WPA_PMK_NAME_LEN];
148 u8 spa[ETH_ALEN];
1b484d60 149 int pairwise; /* Pairwise cipher suite, WPA_CIPHER_* */
6fc6879b
JM		 150 /* TODO: expiration, identity, radius_class, EAP type, VLAN ID */
151 int pmk_r1_pushed;
152};
153
154struct wpa_ft_pmk_r1_sa {
155 struct wpa_ft_pmk_r1_sa *next;
156 u8 pmk_r1[PMK_LEN];
157 u8 pmk_r1_name[WPA_PMK_NAME_LEN];
158 u8 spa[ETH_ALEN];
1b484d60 159 int pairwise; /* Pairwise cipher suite, WPA_CIPHER_* */
6fc6879b
JM		 160 /* TODO: expiration, identity, radius_class, EAP type, VLAN ID */
161};
162
163struct wpa_ft_pmk_cache {
164 struct wpa_ft_pmk_r0_sa *pmk_r0;
165 struct wpa_ft_pmk_r1_sa *pmk_r1;
166};
167
168struct wpa_ft_pmk_cache * wpa_ft_pmk_cache_init(void)
169{
170 struct wpa_ft_pmk_cache *cache;
171
172 cache = os_zalloc(sizeof(*cache));
173
174 return cache;
175}
176
177
178void wpa_ft_pmk_cache_deinit(struct wpa_ft_pmk_cache *cache)
179{
180 struct wpa_ft_pmk_r0_sa *r0, *r0prev;
181 struct wpa_ft_pmk_r1_sa *r1, *r1prev;
182
183 r0 = cache->pmk_r0;
184 while (r0) {
185 r0prev = r0;
186 r0 = r0->next;
187 os_memset(r0prev->pmk_r0, 0, PMK_LEN);
188 os_free(r0prev);
189 }
190
191 r1 = cache->pmk_r1;
192 while (r1) {
193 r1prev = r1;
194 r1 = r1->next;
195 os_memset(r1prev->pmk_r1, 0, PMK_LEN);
196 os_free(r1prev);
197 }
198
199 os_free(cache);
200}
201
202
203static int wpa_ft_store_pmk_r0(struct wpa_authenticator *wpa_auth,
204 const u8 *spa, const u8 *pmk_r0,
1b484d60 205 const u8 *pmk_r0_name, int pairwise)
6fc6879b
JM		 206{
207 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
208 struct wpa_ft_pmk_r0_sa *r0;
209
210 /* TODO: add expiration and limit on number of entries in cache */
211
212 r0 = os_zalloc(sizeof(*r0));
213 if (r0 == NULL)
214 return -1;
215
216 os_memcpy(r0->pmk_r0, pmk_r0, PMK_LEN);
217 os_memcpy(r0->pmk_r0_name, pmk_r0_name, WPA_PMK_NAME_LEN);
218 os_memcpy(r0->spa, spa, ETH_ALEN);
1b484d60 219 r0->pairwise = pairwise;
6fc6879b
JM		 220
221 r0->next = cache->pmk_r0;
222 cache->pmk_r0 = r0;
223
224 return 0;
225}
226
227
228static int wpa_ft_fetch_pmk_r0(struct wpa_authenticator *wpa_auth,
229 const u8 *spa, const u8 *pmk_r0_name,
1b484d60 230 u8 *pmk_r0, int *pairwise)
6fc6879b
JM		 231{
232 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
233 struct wpa_ft_pmk_r0_sa *r0;
234
235 r0 = cache->pmk_r0;
236 while (r0) {
237 if (os_memcmp(r0->spa, spa, ETH_ALEN) == 0 &&
238 os_memcmp(r0->pmk_r0_name, pmk_r0_name, WPA_PMK_NAME_LEN)
239 == 0) {
240 os_memcpy(pmk_r0, r0->pmk_r0, PMK_LEN);
1b484d60
JM		 241 if (pairwise)
242 *pairwise = r0->pairwise;
6fc6879b
JM		 243 return 0;
244 }
245
246 r0 = r0->next;
247 }
248
249 return -1;
250}
251
252
253static int wpa_ft_store_pmk_r1(struct wpa_authenticator *wpa_auth,
254 const u8 *spa, const u8 *pmk_r1,
1b484d60 255 const u8 *pmk_r1_name, int pairwise)
6fc6879b
JM		 256{
257 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
258 struct wpa_ft_pmk_r1_sa *r1;
259
260 /* TODO: add expiration and limit on number of entries in cache */
261
262 r1 = os_zalloc(sizeof(*r1));
263 if (r1 == NULL)
264 return -1;
265
266 os_memcpy(r1->pmk_r1, pmk_r1, PMK_LEN);
267 os_memcpy(r1->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN);
268 os_memcpy(r1->spa, spa, ETH_ALEN);
1b484d60 269 r1->pairwise = pairwise;
6fc6879b
JM		 270
271 r1->next = cache->pmk_r1;
272 cache->pmk_r1 = r1;
273
274 return 0;
275}
276
277
278static int wpa_ft_fetch_pmk_r1(struct wpa_authenticator *wpa_auth,
279 const u8 *spa, const u8 *pmk_r1_name,
1b484d60 280 u8 *pmk_r1, int *pairwise)
6fc6879b
JM		 281{
282 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
283 struct wpa_ft_pmk_r1_sa *r1;
284
285 r1 = cache->pmk_r1;
286 while (r1) {
287 if (os_memcmp(r1->spa, spa, ETH_ALEN) == 0 &&
288 os_memcmp(r1->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN)
289 == 0) {
290 os_memcpy(pmk_r1, r1->pmk_r1, PMK_LEN);
1b484d60
JM		 291 if (pairwise)
292 *pairwise = r1->pairwise;
6fc6879b
JM		 293 return 0;
294 }
295
296 r1 = r1->next;
297 }
298
299 return -1;
300}
301
302
692ec305
JM		 303static int wpa_ft_pull_pmk_r1(struct wpa_state_machine *sm,
304 const u8 *ies, size_t ies_len,
305 const u8 *pmk_r0_name)
6fc6879b
JM		 306{
307 struct ft_remote_r0kh *r0kh;
308 struct ft_r0kh_r1kh_pull_frame frame, f;
309
692ec305 310 r0kh = sm->wpa_auth->conf.r0kh_list;
6fc6879b 311 while (r0kh) {
692ec305
JM		 312 if (r0kh->id_len == sm->r0kh_id_len &&
313 os_memcmp(r0kh->id, sm->r0kh_id, sm->r0kh_id_len) == 0)
6fc6879b
JM		 314 break;
315 r0kh = r0kh->next;
316 }
692ec305
JM		 317 if (r0kh == NULL) {
318 wpa_hexdump(MSG_DEBUG, "FT: Did not find R0KH-ID",
319 sm->r0kh_id, sm->r0kh_id_len);
6fc6879b 320 return -1;
692ec305 321 }
6fc6879b
JM		 322
323 wpa_printf(MSG_DEBUG, "FT: Send PMK-R1 pull request to remote R0KH "
324 "address " MACSTR, MAC2STR(r0kh->addr));
325
326 os_memset(&frame, 0, sizeof(frame));
327 frame.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
328 frame.packet_type = FT_PACKET_R0KH_R1KH_PULL;
329 frame.data_length = host_to_le16(FT_R0KH_R1KH_PULL_DATA_LEN);
692ec305 330 os_memcpy(frame.ap_address, sm->wpa_auth->addr, ETH_ALEN);
6fc6879b
JM		 331
332 /* aes_wrap() does not support inplace encryption, so use a temporary
333 * buffer for the data. */
692ec305 334 if (random_get_bytes(f.nonce, FT_R0KH_R1KH_PULL_NONCE_LEN)) {
6fc6879b
JM		 335 wpa_printf(MSG_DEBUG, "FT: Failed to get random data for "
336 "nonce");
337 return -1;
338 }
692ec305
JM		 339 os_memcpy(sm->ft_pending_pull_nonce, f.nonce,
340 FT_R0KH_R1KH_PULL_NONCE_LEN);
6fc6879b 341 os_memcpy(f.pmk_r0_name, pmk_r0_name, WPA_PMK_NAME_LEN);
692ec305
JM		 342 os_memcpy(f.r1kh_id, sm->wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN);
343 os_memcpy(f.s1kh_id, sm->addr, ETH_ALEN);
5bcd5c5a 344 os_memset(f.pad, 0, sizeof(f.pad));
6fc6879b
JM		 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
692ec305
JM		 350 wpabuf_free(sm->ft_pending_req_ies);
351 sm->ft_pending_req_ies = wpabuf_alloc_copy(ies, ies_len);
352 if (sm->ft_pending_req_ies == NULL)
353 return -1;
354
355 wpa_ft_rrb_send(sm->wpa_auth, r0kh->addr, (u8 *) &frame, sizeof(frame));
6fc6879b
JM		 356
357 return 0;
358}
359
360
361int wpa_auth_derive_ptk_ft(struct wpa_state_machine *sm, const u8 *pmk,
c0a61908 362 struct wpa_ptk *ptk, size_t ptk_len)
6fc6879b
JM		 363{
364 u8 pmk_r0[PMK_LEN], pmk_r0_name[WPA_PMK_NAME_LEN];
26e23750 365 u8 pmk_r1[PMK_LEN];
6fc6879b
JM		 366 u8 ptk_name[WPA_PMK_NAME_LEN];
367 const u8 *mdid = sm->wpa_auth->conf.mobility_domain;
368 const u8 *r0kh = sm->wpa_auth->conf.r0_key_holder;
369 size_t r0kh_len = sm->wpa_auth->conf.r0_key_holder_len;
370 const u8 *r1kh = sm->wpa_auth->conf.r1_key_holder;
371 const u8 *ssid = sm->wpa_auth->conf.ssid;
372 size_t ssid_len = sm->wpa_auth->conf.ssid_len;
373
374
375 if (sm->xxkey_len == 0) {
376 wpa_printf(MSG_DEBUG, "FT: XXKey not available for key "
377 "derivation");
378 return -1;
379 }
380
381 wpa_derive_pmk_r0(sm->xxkey, sm->xxkey_len, ssid, ssid_len, mdid,
382 r0kh, r0kh_len, sm->addr, pmk_r0, pmk_r0_name);
383 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R0", pmk_r0, PMK_LEN);
384 wpa_hexdump(MSG_DEBUG, "FT: PMKR0Name", pmk_r0_name, WPA_PMK_NAME_LEN);
1b484d60
JM		 385 wpa_ft_store_pmk_r0(sm->wpa_auth, sm->addr, pmk_r0, pmk_r0_name,
386 sm->pairwise);
6fc6879b
JM		 387
388 wpa_derive_pmk_r1(pmk_r0, pmk_r0_name, r1kh, sm->addr,
26e23750 389 pmk_r1, sm->pmk_r1_name);
6fc6879b 390 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", pmk_r1, PMK_LEN);
26e23750
JM		 391 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", sm->pmk_r1_name,
392 WPA_PMK_NAME_LEN);
393 wpa_ft_store_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1, sm->pmk_r1_name,
1b484d60 394 sm->pairwise);
6fc6879b
JM		 395
396 wpa_pmk_r1_to_ptk(pmk_r1, sm->SNonce, sm->ANonce, sm->addr,
26e23750 397 sm->wpa_auth->addr, sm->pmk_r1_name,
c0a61908
JM		 398 (u8 *) ptk, ptk_len, ptk_name);
399 wpa_hexdump_key(MSG_DEBUG, "FT: PTK", (u8 *) ptk, ptk_len);
6fc6879b
JM		 400 wpa_hexdump(MSG_DEBUG, "FT: PTKName", ptk_name, WPA_PMK_NAME_LEN);
401
402 return 0;
403}
404
405
406static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
407 const u8 *addr, int idx, u8 *seq)
408{
409 if (wpa_auth->cb.get_seqnum == NULL)
410 return -1;
411 return wpa_auth->cb.get_seqnum(wpa_auth->cb.ctx, addr, idx, seq);
412}
413
414
415static u8 * wpa_ft_gtk_subelem(struct wpa_state_machine *sm, size_t *len)
416{
417 u8 *subelem;
418 struct wpa_group *gsm = sm->group;
419 size_t subelem_len, pad_len;
420 const u8 *key;
421 size_t key_len;
422 u8 keybuf[32];
423
424 key_len = gsm->GTK_len;
425 if (key_len > sizeof(keybuf))
426 return NULL;
427
428 /*
429 * Pad key for AES Key Wrap if it is not multiple of 8 bytes or is less
430 * than 16 bytes.
431 */
432 pad_len = key_len % 8;
433 if (pad_len)
434 pad_len = 8 - pad_len;
435 if (key_len + pad_len < 16)
436 pad_len += 8;
5bfc46bb 437 if (pad_len && key_len < sizeof(keybuf)) {
6fc6879b
JM		 438 os_memcpy(keybuf, gsm->GTK[gsm->GN - 1], key_len);
439 os_memset(keybuf + key_len, 0, pad_len);
440 keybuf[key_len] = 0xdd;
441 key_len += pad_len;
442 key = keybuf;
443 } else
444 key = gsm->GTK[gsm->GN - 1];
445
446 /*
39eb4d08 447 * Sub-elem ID[1] | Length[1] | Key Info[2] | Key Length[1] | RSC[8] |
6fc6879b
JM		 448 * Key[5..32].
449 */
39eb4d08 450 subelem_len = 13 + key_len + 8;
6fc6879b
JM		 451 subelem = os_zalloc(subelem_len);
452 if (subelem == NULL)
453 return NULL;
454
455 subelem[0] = FTIE_SUBELEM_GTK;
39eb4d08
JM		 456 subelem[1] = 11 + key_len + 8;
457 /* Key ID in B0-B1 of Key Info */
458 WPA_PUT_LE16(&subelem[2], gsm->GN & 0x03);
459 subelem[4] = gsm->GTK_len;
460 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, subelem + 5);
461 if (aes_wrap(sm->PTK.kek, key_len / 8, key, subelem + 13)) {
6fc6879b
JM		 462 os_free(subelem);
463 return NULL;
464 }
465
466 *len = subelem_len;
467 return subelem;
468}
469
470
b27f13ed
JM		 471#ifdef CONFIG_IEEE80211W
472static u8 * wpa_ft_igtk_subelem(struct wpa_state_machine *sm, size_t *len)
473{
474 u8 *subelem, *pos;
475 struct wpa_group *gsm = sm->group;
476 size_t subelem_len;
477
ff89afb7
JM		 478 /* Sub-elem ID[1] | Length[1] | KeyID[2] | IPN[6] | Key Length[1] |
479 * Key[16+8] */
480 subelem_len = 1 + 1 + 2 + 6 + 1 + WPA_IGTK_LEN + 8;
b27f13ed
JM		 481 subelem = os_zalloc(subelem_len);
482 if (subelem == NULL)
483 return NULL;
484
485 pos = subelem;
486 *pos++ = FTIE_SUBELEM_IGTK;
487 *pos++ = subelem_len - 2;
488 WPA_PUT_LE16(pos, gsm->GN_igtk);
489 pos += 2;
9008a3e4 490 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos);
b27f13ed 491 pos += 6;
ff89afb7 492 *pos++ = WPA_IGTK_LEN;
b27f13ed
JM		 493 if (aes_wrap(sm->PTK.kek, WPA_IGTK_LEN / 8,
494 gsm->IGTK[gsm->GN_igtk - 4], pos)) {
495 os_free(subelem);
496 return NULL;
497 }
498
499 *len = subelem_len;
500 return subelem;
501}
502#endif /* CONFIG_IEEE80211W */
503
504
88b32a99
SP		 505static u8 * wpa_ft_process_rdie(struct wpa_state_machine *sm,
506 u8 *pos, u8 *end, u8 id, u8 descr_count,
f238cf9f
JM		 507 const u8 *ies, size_t ies_len)
508{
509 struct ieee802_11_elems parse;
510 struct rsn_rdie *rdie;
511
512 wpa_printf(MSG_DEBUG, "FT: Resource Request: id=%d descr_count=%d",
513 id, descr_count);
514 wpa_hexdump(MSG_MSGDUMP, "FT: Resource descriptor IE(s)",
515 ies, ies_len);
516
517 if (end - pos < (int) sizeof(*rdie)) {
518 wpa_printf(MSG_ERROR, "FT: Not enough room for response RDIE");
519 return pos;
520 }
521
522 *pos++ = WLAN_EID_RIC_DATA;
523 *pos++ = sizeof(*rdie);
524 rdie = (struct rsn_rdie *) pos;
525 rdie->id = id;
526 rdie->descr_count = 0;
527 rdie->status_code = host_to_le16(WLAN_STATUS_SUCCESS);
528 pos += sizeof(*rdie);
529
530 if (ieee802_11_parse_elems((u8 *) ies, ies_len, &parse, 1) ==
531 ParseFailed) {
532 wpa_printf(MSG_DEBUG, "FT: Failed to parse request IEs");
533 rdie->status_code =
534 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
535 return pos;
536 }
537
fe6bdb77 538#ifdef NEED_AP_MLME
88b32a99 539 if (parse.wmm_tspec && sm->wpa_auth->conf.ap_mlme) {
f238cf9f
JM		 540 struct wmm_tspec_element *tspec;
541 int res;
542
543 if (parse.wmm_tspec_len + 2 < (int) sizeof(*tspec)) {
544 wpa_printf(MSG_DEBUG, "FT: Too short WMM TSPEC IE "
545 "(%d)", (int) parse.wmm_tspec_len);
546 rdie->status_code =
547 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
548 return pos;
549 }
550 if (end - pos < (int) sizeof(*tspec)) {
551 wpa_printf(MSG_ERROR, "FT: Not enough room for "
552 "response TSPEC");
553 rdie->status_code =
554 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
555 return pos;
556 }
557 tspec = (struct wmm_tspec_element *) pos;
558 os_memcpy(tspec, parse.wmm_tspec - 2, sizeof(*tspec));
559 res = wmm_process_tspec(tspec);
560 wpa_printf(MSG_DEBUG, "FT: ADDTS processing result: %d", res);
561 if (res == WMM_ADDTS_STATUS_INVALID_PARAMETERS)
562 rdie->status_code =
563 host_to_le16(WLAN_STATUS_INVALID_PARAMETERS);
564 else if (res == WMM_ADDTS_STATUS_REFUSED)
565 rdie->status_code =
566 host_to_le16(WLAN_STATUS_REQUEST_DECLINED);
567 else {
568 /* TSPEC accepted; include updated TSPEC in response */
569 rdie->descr_count = 1;
570 pos += sizeof(*tspec);
571 }
572 return pos;
573 }
fe6bdb77 574#endif /* NEED_AP_MLME */
f238cf9f 575
88b32a99
SP		 576 if (parse.wmm_tspec && !sm->wpa_auth->conf.ap_mlme) {
577 struct wmm_tspec_element *tspec;
578 int res;
579
580 tspec = (struct wmm_tspec_element *) pos;
581 os_memcpy(tspec, parse.wmm_tspec - 2, sizeof(*tspec));
582 res = wpa_ft_add_tspec(sm->wpa_auth, sm->addr, pos,
583 sizeof(*tspec));
584 if (res >= 0) {
585 if (res)
586 rdie->status_code = host_to_le16(res);
587 else {
588 /* TSPEC accepted; include updated TSPEC in
589 * response */
006309b5
JM		 590 rdie->descr_count = 1;
591 pos += sizeof(*tspec);
88b32a99
SP		 592 }
593 return pos;
594 }
595 }
596
f238cf9f
JM		 597 wpa_printf(MSG_DEBUG, "FT: No supported resource requested");
598 rdie->status_code = host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
599 return pos;
600}
601
602
88b32a99
SP		 603static u8 * wpa_ft_process_ric(struct wpa_state_machine *sm, u8 *pos, u8 *end,
604 const u8 *ric, size_t ric_len)
f238cf9f
JM		 605{
606 const u8 *rpos, *start;
607 const struct rsn_rdie *rdie;
608
609 wpa_hexdump(MSG_MSGDUMP, "FT: RIC Request", ric, ric_len);
610
611 rpos = ric;
612 while (rpos + sizeof(*rdie) < ric + ric_len) {
613 if (rpos[0] != WLAN_EID_RIC_DATA || rpos[1] < sizeof(*rdie) ||
614 rpos + 2 + rpos[1] > ric + ric_len)
615 break;
616 rdie = (const struct rsn_rdie *) (rpos + 2);
617 rpos += 2 + rpos[1];
618 start = rpos;
619
620 while (rpos + 2 <= ric + ric_len &&
621 rpos + 2 + rpos[1] <= ric + ric_len) {
622 if (rpos[0] == WLAN_EID_RIC_DATA)
623 break;
624 rpos += 2 + rpos[1];
625 }
88b32a99 626 pos = wpa_ft_process_rdie(sm, pos, end, rdie->id,
f238cf9f
JM		 627 rdie->descr_count,
628 start, rpos - start);
629 }
630
631 return pos;
632}
633
634
6fc6879b 635u8 * wpa_sm_write_assoc_resp_ies(struct wpa_state_machine *sm, u8 *pos,
f238cf9f
JM		 636 size_t max_len, int auth_alg,
637 const u8 *req_ies, size_t req_ies_len)
6fc6879b 638{
738a1cb2
JM		 639 u8 *end, *mdie, *ftie, *rsnie = NULL, *r0kh_id, *subelem = NULL;
640 size_t mdie_len, ftie_len, rsnie_len = 0, r0kh_id_len, subelem_len = 0;
6fc6879b
JM		 641 int res;
642 struct wpa_auth_config *conf;
643 struct rsn_ftie *_ftie;
f238cf9f
JM		 644 struct wpa_ft_ies parse;
645 u8 *ric_start;
6e80516a 646 u8 *anonce, *snonce;
6fc6879b
JM		 647
648 if (sm == NULL)
649 return pos;
650
651 conf = &sm->wpa_auth->conf;
652
aa189ac9 653 if (!wpa_key_mgmt_ft(sm->wpa_key_mgmt))
6fc6879b
JM		 654 return pos;
655
656 end = pos + max_len;
657
738a1cb2
JM		 658 if (auth_alg == WLAN_AUTH_FT) {
659 /*
660 * RSN (only present if this is a Reassociation Response and
661 * part of a fast BSS transition)
662 */
663 res = wpa_write_rsn_ie(conf, pos, end - pos, sm->pmk_r1_name);
664 if (res < 0)
665 return pos;
666 rsnie = pos;
667 rsnie_len = res;
668 pos += res;
669 }
6fc6879b
JM		 670
671 /* Mobility Domain Information */
672 res = wpa_write_mdie(conf, pos, end - pos);
673 if (res < 0)
674 return pos;
675 mdie = pos;
676 mdie_len = res;
677 pos += res;
678
679 /* Fast BSS Transition Information */
680 if (auth_alg == WLAN_AUTH_FT) {
681 subelem = wpa_ft_gtk_subelem(sm, &subelem_len);
682 r0kh_id = sm->r0kh_id;
683 r0kh_id_len = sm->r0kh_id_len;
6e80516a
JM		 684 anonce = sm->ANonce;
685 snonce = sm->SNonce;
b27f13ed
JM		 686#ifdef CONFIG_IEEE80211W
687 if (sm->mgmt_frame_prot) {
688 u8 *igtk;
689 size_t igtk_len;
690 u8 *nbuf;
691 igtk = wpa_ft_igtk_subelem(sm, &igtk_len);
692 if (igtk == NULL) {
693 os_free(subelem);
694 return pos;
695 }
696 nbuf = os_realloc(subelem, subelem_len + igtk_len);
697 if (nbuf == NULL) {
698 os_free(subelem);
699 os_free(igtk);
700 return pos;
701 }
702 subelem = nbuf;
703 os_memcpy(subelem + subelem_len, igtk, igtk_len);
704 subelem_len += igtk_len;
705 os_free(igtk);
706 }
707#endif /* CONFIG_IEEE80211W */
6fc6879b
JM		 708 } else {
709 r0kh_id = conf->r0_key_holder;
710 r0kh_id_len = conf->r0_key_holder_len;
6e80516a
JM		 711 anonce = NULL;
712 snonce = NULL;
6fc6879b 713 }
6e80516a 714 res = wpa_write_ftie(conf, r0kh_id, r0kh_id_len, anonce, snonce, pos,
6fc6879b
JM		 715 end - pos, subelem, subelem_len);
716 os_free(subelem);
717 if (res < 0)
718 return pos;
719 ftie = pos;
720 ftie_len = res;
721 pos += res;
722
0f857f43
JM		 723 os_free(sm->assoc_resp_ftie);
724 sm->assoc_resp_ftie = os_malloc(ftie_len);
725 if (sm->assoc_resp_ftie)
726 os_memcpy(sm->assoc_resp_ftie, ftie, ftie_len);
727
6fc6879b 728 _ftie = (struct rsn_ftie *) (ftie + 2);
1f6e69e0
JM		 729 if (auth_alg == WLAN_AUTH_FT)
730 _ftie->mic_control[1] = 3; /* Information element count */
f238cf9f
JM		 731
732 ric_start = pos;
733 if (wpa_ft_parse_ies(req_ies, req_ies_len, &parse) == 0 && parse.ric) {
88b32a99
SP		 734 pos = wpa_ft_process_ric(sm, pos, end, parse.ric,
735 parse.ric_len);
1f6e69e0
JM		 736 if (auth_alg == WLAN_AUTH_FT)
737 _ftie->mic_control[1] +=
738 ieee802_11_ie_count(ric_start,
739 pos - ric_start);
f238cf9f
JM		 740 }
741 if (ric_start == pos)
742 ric_start = NULL;
743
1f6e69e0
JM		 744 if (auth_alg == WLAN_AUTH_FT &&
745 wpa_ft_mic(sm->PTK.kck, sm->addr, sm->wpa_auth->addr, 6,
6fc6879b 746 mdie, mdie_len, ftie, ftie_len,
f238cf9f
JM		 747 rsnie, rsnie_len,
748 ric_start, ric_start ? pos - ric_start : 0,
749 _ftie->mic) < 0)
6fc6879b
JM		 750 wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC");
751
752 return pos;
753}
754
755
6fc6879b
JM		 756static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
757 int vlan_id,
71934751 758 enum wpa_alg alg, const u8 *addr, int idx,
6fc6879b
JM		 759 u8 *key, size_t key_len)
760{
761 if (wpa_auth->cb.set_key == NULL)
762 return -1;
763 return wpa_auth->cb.set_key(wpa_auth->cb.ctx, vlan_id, alg, addr, idx,
764 key, key_len);
765}
766
767
0e84c254 768void wpa_ft_install_ptk(struct wpa_state_machine *sm)
6fc6879b 769{
71934751 770 enum wpa_alg alg;
6fc6879b
JM		 771 int klen;
772
773 /* MLME-SETKEYS.request(PTK) */
c3550295
JM		 774 alg = wpa_cipher_to_alg(sm->pairwise);
775 klen = wpa_cipher_key_len(sm->pairwise);
776 if (!wpa_cipher_valid_pairwise(sm->pairwise)) {
0e84c254
JM		 777 wpa_printf(MSG_DEBUG, "FT: Unknown pairwise alg 0x%x - skip "
778 "PTK configuration", sm->pairwise);
6fc6879b 779 return;
0e84c254 780 }
6fc6879b
JM		 781
782 /* FIX: add STA entry to kernel/driver here? The set_key will fail
783 * most likely without this.. At the moment, STA entry is added only
0e84c254
JM		 784 * after association has been completed. This function will be called
785 * again after association to get the PTK configured, but that could be
786 * optimized by adding the STA entry earlier.
6fc6879b
JM		 787 */
788 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
789 sm->PTK.tk1, klen))
790 return;
791
792 /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
793 sm->pairwise_set = TRUE;
794}
795
796
692ec305 797static int wpa_ft_process_auth_req(struct wpa_state_machine *sm,
6fc6879b
JM		 798 const u8 *ies, size_t ies_len,
799 u8 **resp_ies, size_t *resp_ies_len)
800{
801 struct rsn_mdie *mdie;
802 struct rsn_ftie *ftie;
803 u8 pmk_r1[PMK_LEN], pmk_r1_name[WPA_PMK_NAME_LEN];
804 u8 ptk_name[WPA_PMK_NAME_LEN];
805 struct wpa_auth_config *conf;
806 struct wpa_ft_ies parse;
c0a61908 807 size_t buflen, ptk_len;
6fc6879b
JM		 808 int ret;
809 u8 *pos, *end;
1b484d60 810 int pairwise;
6fc6879b
JM		 811
812 *resp_ies = NULL;
813 *resp_ies_len = 0;
814
815 sm->pmk_r1_name_valid = 0;
816 conf = &sm->wpa_auth->conf;
817
818 wpa_hexdump(MSG_DEBUG, "FT: Received authentication frame IEs",
819 ies, ies_len);
820
821 if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) {
822 wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs");
823 return WLAN_STATUS_UNSPECIFIED_FAILURE;
824 }
825
826 mdie = (struct rsn_mdie *) parse.mdie;
827 if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
828 os_memcmp(mdie->mobility_domain,
829 sm->wpa_auth->conf.mobility_domain,
830 MOBILITY_DOMAIN_ID_LEN) != 0) {
831 wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
832 return WLAN_STATUS_INVALID_MDIE;
833 }
834
835 ftie = (struct rsn_ftie *) parse.ftie;
836 if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
837 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
838 return WLAN_STATUS_INVALID_FTIE;
839 }
840
841 os_memcpy(sm->SNonce, ftie->snonce, WPA_NONCE_LEN);
842
843 if (parse.r0kh_id == NULL) {
844 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE - no R0KH-ID");
845 return WLAN_STATUS_INVALID_FTIE;
846 }
847
848 wpa_hexdump(MSG_DEBUG, "FT: STA R0KH-ID",
849 parse.r0kh_id, parse.r0kh_id_len);
850 os_memcpy(sm->r0kh_id, parse.r0kh_id, parse.r0kh_id_len);
851 sm->r0kh_id_len = parse.r0kh_id_len;
852
853 if (parse.rsn_pmkid == NULL) {
854 wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE");
855 return WLAN_STATUS_INVALID_PMKID;
856 }
857
858 wpa_hexdump(MSG_DEBUG, "FT: Requested PMKR0Name",
859 parse.rsn_pmkid, WPA_PMK_NAME_LEN);
860 wpa_derive_pmk_r1_name(parse.rsn_pmkid,
861 sm->wpa_auth->conf.r1_key_holder, sm->addr,
862 pmk_r1_name);
863 wpa_hexdump(MSG_DEBUG, "FT: Derived requested PMKR1Name",
864 pmk_r1_name, WPA_PMK_NAME_LEN);
865
1b484d60
JM		 866 if (wpa_ft_fetch_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1_name, pmk_r1,
867 &pairwise) < 0) {
692ec305 868 if (wpa_ft_pull_pmk_r1(sm, ies, ies_len, parse.rsn_pmkid) < 0) {
6fc6879b
JM		 869 wpa_printf(MSG_DEBUG, "FT: Did not have matching "
870 "PMK-R1 and unknown R0KH-ID");
871 return WLAN_STATUS_INVALID_PMKID;
872 }
873
692ec305 874 return -1; /* Status pending */
6fc6879b
JM		 875 }
876
877 wpa_hexdump_key(MSG_DEBUG, "FT: Selected PMK-R1", pmk_r1, PMK_LEN);
878 sm->pmk_r1_name_valid = 1;
879 os_memcpy(sm->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN);
880
3642c431 881 if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) {
6fc6879b
JM		 882 wpa_printf(MSG_DEBUG, "FT: Failed to get random data for "
883 "ANonce");
884 return WLAN_STATUS_UNSPECIFIED_FAILURE;
885 }
886
887 wpa_hexdump(MSG_DEBUG, "FT: Received SNonce",
888 sm->SNonce, WPA_NONCE_LEN);
889 wpa_hexdump(MSG_DEBUG, "FT: Generated ANonce",
890 sm->ANonce, WPA_NONCE_LEN);
891
eb7719ff 892 ptk_len = pairwise == WPA_CIPHER_TKIP ? 64 : 48;
6fc6879b
JM		 893 wpa_pmk_r1_to_ptk(pmk_r1, sm->SNonce, sm->ANonce, sm->addr,
894 sm->wpa_auth->addr, pmk_r1_name,
c0a61908 895 (u8 *) &sm->PTK, ptk_len, ptk_name);
6fc6879b 896 wpa_hexdump_key(MSG_DEBUG, "FT: PTK",
c0a61908 897 (u8 *) &sm->PTK, ptk_len);
6fc6879b
JM		 898 wpa_hexdump(MSG_DEBUG, "FT: PTKName", ptk_name, WPA_PMK_NAME_LEN);
899
0e84c254 900 sm->pairwise = pairwise;
3d4d2348 901 sm->PTK_valid = TRUE;
6fc6879b
JM		 902 wpa_ft_install_ptk(sm);
903
904 buflen = 2 + sizeof(struct rsn_mdie) + 2 + sizeof(struct rsn_ftie) +
905 2 + FT_R1KH_ID_LEN + 200;
906 *resp_ies = os_zalloc(buflen);
907 if (*resp_ies == NULL) {
908 return WLAN_STATUS_UNSPECIFIED_FAILURE;
909 }
910
911 pos = *resp_ies;
912 end = *resp_ies + buflen;
913
914 ret = wpa_write_rsn_ie(conf, pos, end - pos, parse.rsn_pmkid);
915 if (ret < 0) {
916 os_free(*resp_ies);
917 *resp_ies = NULL;
918 return WLAN_STATUS_UNSPECIFIED_FAILURE;
919 }
920 pos += ret;
921
922 ret = wpa_write_mdie(conf, pos, end - pos);
923 if (ret < 0) {
924 os_free(*resp_ies);
925 *resp_ies = NULL;
926 return WLAN_STATUS_UNSPECIFIED_FAILURE;
927 }
928 pos += ret;
929
930 ret = wpa_write_ftie(conf, parse.r0kh_id, parse.r0kh_id_len,
931 sm->ANonce, sm->SNonce, pos, end - pos, NULL, 0);
932 if (ret < 0) {
933 os_free(*resp_ies);
934 *resp_ies = NULL;
935 return WLAN_STATUS_UNSPECIFIED_FAILURE;
936 }
937 pos += ret;
938
939 *resp_ies_len = pos - *resp_ies;
940
941 return WLAN_STATUS_SUCCESS;
942}
943
944
945void wpa_ft_process_auth(struct wpa_state_machine *sm, const u8 *bssid,
946 u16 auth_transaction, const u8 *ies, size_t ies_len,
947 void (*cb)(void *ctx, const u8 *dst, const u8 *bssid,
948 u16 auth_transaction, u16 status,
949 const u8 *ies, size_t ies_len),
950 void *ctx)
951{
952 u16 status;
953 u8 *resp_ies;
954 size_t resp_ies_len;
692ec305 955 int res;
6fc6879b
JM		 956
957 if (sm == NULL) {
958 wpa_printf(MSG_DEBUG, "FT: Received authentication frame, but "
959 "WPA SM not available");
960 return;
961 }
962
963 wpa_printf(MSG_DEBUG, "FT: Received authentication frame: STA=" MACSTR
964 " BSSID=" MACSTR " transaction=%d",
965 MAC2STR(sm->addr), MAC2STR(bssid), auth_transaction);
692ec305
JM		 966 sm->ft_pending_cb = cb;
967 sm->ft_pending_cb_ctx = ctx;
968 sm->ft_pending_auth_transaction = auth_transaction;
969 res = wpa_ft_process_auth_req(sm, ies, ies_len, &resp_ies,
970 &resp_ies_len);
971 if (res < 0) {
972 wpa_printf(MSG_DEBUG, "FT: Callback postponed until response is available");
973 return;
974 }
975 status = res;
6fc6879b
JM		 976
977 wpa_printf(MSG_DEBUG, "FT: FT authentication response: dst=" MACSTR
978 " auth_transaction=%d status=%d",
979 MAC2STR(sm->addr), auth_transaction + 1, status);
980 wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len);
981 cb(ctx, sm->addr, bssid, auth_transaction + 1, status,
982 resp_ies, resp_ies_len);
983 os_free(resp_ies);
984}
985
986
987u16 wpa_ft_validate_reassoc(struct wpa_state_machine *sm, const u8 *ies,
988 size_t ies_len)
989{
990 struct wpa_ft_ies parse;
991 struct rsn_mdie *mdie;
992 struct rsn_ftie *ftie;
993 u8 mic[16];
8aaf894d 994 unsigned int count;
6fc6879b
JM		 995
996 if (sm == NULL)
997 return WLAN_STATUS_UNSPECIFIED_FAILURE;
998
999 wpa_hexdump(MSG_DEBUG, "FT: Reassoc Req IEs", ies, ies_len);
1000
1001 if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) {
1002 wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs");
1003 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1004 }
1005
1006 if (parse.rsn == NULL) {
1007 wpa_printf(MSG_DEBUG, "FT: No RSNIE in Reassoc Req");
1008 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1009 }
1010
1011 if (parse.rsn_pmkid == NULL) {
1012 wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE");
1013 return WLAN_STATUS_INVALID_PMKID;
1014 }
1015
1016 if (os_memcmp(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN) != 0)
1017 {
1018 wpa_printf(MSG_DEBUG, "FT: PMKID in Reassoc Req did not match "
1019 "with the PMKR1Name derived from auth request");
1020 return WLAN_STATUS_INVALID_PMKID;
1021 }
1022
1023 mdie = (struct rsn_mdie *) parse.mdie;
1024 if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
1025 os_memcmp(mdie->mobility_domain,
1026 sm->wpa_auth->conf.mobility_domain,
1027 MOBILITY_DOMAIN_ID_LEN) != 0) {
1028 wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
1029 return WLAN_STATUS_INVALID_MDIE;
1030 }
1031
1032 ftie = (struct rsn_ftie *) parse.ftie;
1033 if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
1034 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
1035 return WLAN_STATUS_INVALID_FTIE;
1036 }
1037
0ae145cd
JM		 1038 if (os_memcmp(ftie->snonce, sm->SNonce, WPA_NONCE_LEN) != 0) {
1039 wpa_printf(MSG_DEBUG, "FT: SNonce mismatch in FTIE");
1040 wpa_hexdump(MSG_DEBUG, "FT: Received SNonce",
1041 ftie->snonce, WPA_NONCE_LEN);
1042 wpa_hexdump(MSG_DEBUG, "FT: Expected SNonce",
1043 sm->SNonce, WPA_NONCE_LEN);
1044 return -1;
1045 }
1046
1047 if (os_memcmp(ftie->anonce, sm->ANonce, WPA_NONCE_LEN) != 0) {
1048 wpa_printf(MSG_DEBUG, "FT: ANonce mismatch in FTIE");
1049 wpa_hexdump(MSG_DEBUG, "FT: Received ANonce",
1050 ftie->anonce, WPA_NONCE_LEN);
1051 wpa_hexdump(MSG_DEBUG, "FT: Expected ANonce",
1052 sm->ANonce, WPA_NONCE_LEN);
1053 return -1;
1054 }
1055
1056
1057 if (parse.r0kh_id == NULL) {
1058 wpa_printf(MSG_DEBUG, "FT: No R0KH-ID subelem in FTIE");
1059 return -1;
1060 }
1061
1062 if (parse.r0kh_id_len != sm->r0kh_id_len ||
1063 os_memcmp(parse.r0kh_id, sm->r0kh_id, parse.r0kh_id_len) != 0) {
1064 wpa_printf(MSG_DEBUG, "FT: R0KH-ID in FTIE did not match with "
1065 "the current R0KH-ID");
1066 wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID in FTIE",
1067 parse.r0kh_id, parse.r0kh_id_len);
1068 wpa_hexdump(MSG_DEBUG, "FT: The current R0KH-ID",
1069 sm->r0kh_id, sm->r0kh_id_len);
1070 return -1;
1071 }
1072
1073 if (parse.r1kh_id == NULL) {
1074 wpa_printf(MSG_DEBUG, "FT: No R1KH-ID subelem in FTIE");
1075 return -1;
1076 }
1077
1078 if (os_memcmp(parse.r1kh_id, sm->wpa_auth->conf.r1_key_holder,
1079 FT_R1KH_ID_LEN) != 0) {
1080 wpa_printf(MSG_DEBUG, "FT: Unknown R1KH-ID used in "
1081 "ReassocReq");
1082 wpa_hexdump(MSG_DEBUG, "FT: R1KH-ID in FTIE",
1083 parse.r1kh_id, FT_R1KH_ID_LEN);
1084 wpa_hexdump(MSG_DEBUG, "FT: Expected R1KH-ID",
1085 sm->wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN);
1086 return -1;
1087 }
1088
1089 if (parse.rsn_pmkid == NULL ||
1090 os_memcmp(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN)) {
1091 wpa_printf(MSG_DEBUG, "FT: No matching PMKR1Name (PMKID) in "
1092 "RSNIE (pmkid=%d)", !!parse.rsn_pmkid);
1093 return -1;
1094 }
1095
8aaf894d
JM		 1096 count = 3;
1097 if (parse.ric)
c284b461 1098 count += ieee802_11_ie_count(parse.ric, parse.ric_len);
8aaf894d
JM		 1099 if (ftie->mic_control[1] != count) {
1100 wpa_printf(MSG_DEBUG, "FT: Unexpected IE count in MIC "
1101 "Control: received %u expected %u",
1102 ftie->mic_control[1], count);
1103 return -1;
1104 }
1105
6fc6879b
JM		 1106 if (wpa_ft_mic(sm->PTK.kck, sm->addr, sm->wpa_auth->addr, 5,
1107 parse.mdie - 2, parse.mdie_len + 2,
1108 parse.ftie - 2, parse.ftie_len + 2,
babfbf15
JM		 1109 parse.rsn - 2, parse.rsn_len + 2,
1110 parse.ric, parse.ric_len,
6fc6879b
JM		 1111 mic) < 0) {
1112 wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC");
1113 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1114 }
1115
1116 if (os_memcmp(mic, ftie->mic, 16) != 0) {
1117 wpa_printf(MSG_DEBUG, "FT: Invalid MIC in FTIE");
88b32a99
SP		 1118 wpa_printf(MSG_DEBUG, "FT: addr=" MACSTR " auth_addr=" MACSTR,
1119 MAC2STR(sm->addr), MAC2STR(sm->wpa_auth->addr));
6fc6879b
JM		 1120 wpa_hexdump(MSG_MSGDUMP, "FT: Received MIC", ftie->mic, 16);
1121 wpa_hexdump(MSG_MSGDUMP, "FT: Calculated MIC", mic, 16);
88b32a99
SP		 1122 wpa_hexdump(MSG_MSGDUMP, "FT: MDIE",
1123 parse.mdie - 2, parse.mdie_len + 2);
1124 wpa_hexdump(MSG_MSGDUMP, "FT: FTIE",
1125 parse.ftie - 2, parse.ftie_len + 2);
1126 wpa_hexdump(MSG_MSGDUMP, "FT: RSN",
1127 parse.rsn - 2, parse.rsn_len + 2);
6fc6879b
JM		 1128 return WLAN_STATUS_INVALID_FTIE;
1129 }
1130
1131 return WLAN_STATUS_SUCCESS;
1132}
1133
1134
1135int wpa_ft_action_rx(struct wpa_state_machine *sm, const u8 *data, size_t len)
1136{
1137 const u8 *sta_addr, *target_ap;
1138 const u8 *ies;
1139 size_t ies_len;
1140 u8 action;
1141 struct ft_rrb_frame *frame;
1142
1143 if (sm == NULL)
1144 return -1;
1145
1146 /*
1147 * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6]
1148 * FT Request action frame body[variable]
1149 */
1150
1151 if (len < 14) {
1152 wpa_printf(MSG_DEBUG, "FT: Too short FT Action frame "
1153 "(len=%lu)", (unsigned long) len);
1154 return -1;
1155 }
1156
1157 action = data[1];
1158 sta_addr = data + 2;
1159 target_ap = data + 8;
1160 ies = data + 14;
1161 ies_len = len - 14;
1162
1163 wpa_printf(MSG_DEBUG, "FT: Received FT Action frame (STA=" MACSTR
1164 " Target AP=" MACSTR " Action=%d)",
1165 MAC2STR(sta_addr), MAC2STR(target_ap), action);
1166
1167 if (os_memcmp(sta_addr, sm->addr, ETH_ALEN) != 0) {
1168 wpa_printf(MSG_DEBUG, "FT: Mismatch in FT Action STA address: "
1169 "STA=" MACSTR " STA-Address=" MACSTR,
1170 MAC2STR(sm->addr), MAC2STR(sta_addr));
1171 return -1;
1172 }
1173
1174 /*
1175 * Do some sanity checking on the target AP address (not own and not
1176 * broadcast. This could be extended to filter based on a list of known
1177 * APs in the MD (if such a list were configured).
1178 */
1179 if ((target_ap[0] & 0x01) ||
1180 os_memcmp(target_ap, sm->wpa_auth->addr, ETH_ALEN) == 0) {
1181 wpa_printf(MSG_DEBUG, "FT: Invalid Target AP in FT Action "
1182 "frame");
1183 return -1;
1184 }
1185
1186 wpa_hexdump(MSG_MSGDUMP, "FT: Action frame body", ies, ies_len);
1187
1188 /* RRB - Forward action frame to the target AP */
1189 frame = os_malloc(sizeof(*frame) + len);
2c48211c
JM		 1190 if (frame == NULL)
1191 return -1;
6fc6879b
JM		 1192 frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1193 frame->packet_type = FT_PACKET_REQUEST;
1194 frame->action_length = host_to_le16(len);
1195 os_memcpy(frame->ap_address, sm->wpa_auth->addr, ETH_ALEN);
1196 os_memcpy(frame + 1, data, len);
1197
1198 wpa_ft_rrb_send(sm->wpa_auth, target_ap, (u8 *) frame,
1199 sizeof(*frame) + len);
1200 os_free(frame);
1201
1202 return 0;
1203}
1204
1205
692ec305
JM		 1206static void wpa_ft_rrb_rx_request_cb(void *ctx, const u8 *dst, const u8 *bssid,
1207 u16 auth_transaction, u16 resp,
1208 const u8 *ies, size_t ies_len)
1209{
1210 struct wpa_state_machine *sm = ctx;
1211 wpa_printf(MSG_DEBUG, "FT: Over-the-DS RX request cb for " MACSTR,
1212 MAC2STR(sm->addr));
1213 wpa_ft_send_rrb_auth_resp(sm, sm->ft_pending_current_ap, sm->addr,
1214 WLAN_STATUS_SUCCESS, ies, ies_len);
1215}
1216
1217
6fc6879b
JM		 1218static int wpa_ft_rrb_rx_request(struct wpa_authenticator *wpa_auth,
1219 const u8 *current_ap, const u8 *sta_addr,
1220 const u8 *body, size_t len)
1221{
1222 struct wpa_state_machine *sm;
1223 u16 status;
692ec305
JM		 1224 u8 *resp_ies;
1225 size_t resp_ies_len;
1226 int res;
6fc6879b
JM		 1227
1228 sm = wpa_ft_add_sta(wpa_auth, sta_addr);
1229 if (sm == NULL) {
1230 wpa_printf(MSG_DEBUG, "FT: Failed to add new STA based on "
1231 "RRB Request");
1232 return -1;
1233 }
1234
1235 wpa_hexdump(MSG_MSGDUMP, "FT: RRB Request Frame body", body, len);
1236
692ec305
JM		 1237 sm->ft_pending_cb = wpa_ft_rrb_rx_request_cb;
1238 sm->ft_pending_cb_ctx = sm;
1239 os_memcpy(sm->ft_pending_current_ap, current_ap, ETH_ALEN);
1240 res = wpa_ft_process_auth_req(sm, body, len, &resp_ies,
1241 &resp_ies_len);
1242 if (res < 0) {
1243 wpa_printf(MSG_DEBUG, "FT: No immediate response available - wait for pull response");
1244 return 0;
1245 }
1246 status = res;
1247
1248 res = wpa_ft_send_rrb_auth_resp(sm, current_ap, sta_addr, status,
1249 resp_ies, resp_ies_len);
1250 os_free(resp_ies);
1251 return res;
1252}
1253
1254
1255static int wpa_ft_send_rrb_auth_resp(struct wpa_state_machine *sm,
1256 const u8 *current_ap, const u8 *sta_addr,
1257 u16 status, const u8 *resp_ies,
1258 size_t resp_ies_len)
1259{
1260 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
1261 size_t rlen;
1262 struct ft_rrb_frame *frame;
1263 u8 *pos;
6fc6879b
JM		 1264
1265 wpa_printf(MSG_DEBUG, "FT: RRB authentication response: STA=" MACSTR
1266 " CurrentAP=" MACSTR " status=%d",
1267 MAC2STR(sm->addr), MAC2STR(current_ap), status);
1268 wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len);
1269
1270 /* RRB - Forward action frame response to the Current AP */
1271
1272 /*
1273 * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6]
1274 * Status_Code[2] FT Request action frame body[variable]
1275 */
1276 rlen = 2 + 2 * ETH_ALEN + 2 + resp_ies_len;
1277
1278 frame = os_malloc(sizeof(*frame) + rlen);
692ec305 1279 if (frame == NULL)
2c48211c 1280 return -1;
6fc6879b
JM		 1281 frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1282 frame->packet_type = FT_PACKET_RESPONSE;
1283 frame->action_length = host_to_le16(rlen);
1284 os_memcpy(frame->ap_address, wpa_auth->addr, ETH_ALEN);
1285 pos = (u8 *) (frame + 1);
1286 *pos++ = WLAN_ACTION_FT;
1287 *pos++ = 2; /* Action: Response */
1288 os_memcpy(pos, sta_addr, ETH_ALEN);
1289 pos += ETH_ALEN;
1290 os_memcpy(pos, wpa_auth->addr, ETH_ALEN);
1291 pos += ETH_ALEN;
1292 WPA_PUT_LE16(pos, status);
1293 pos += 2;
692ec305 1294 if (resp_ies)
6fc6879b 1295 os_memcpy(pos, resp_ies, resp_ies_len);
6fc6879b
JM		 1296
1297 wpa_ft_rrb_send(wpa_auth, current_ap, (u8 *) frame,
1298 sizeof(*frame) + rlen);
1299 os_free(frame);
1300
1301 return 0;
1302}
1303
1304
1305static int wpa_ft_rrb_rx_pull(struct wpa_authenticator *wpa_auth,
1306 const u8 *src_addr,
1307 const u8 *data, size_t data_len)
1308{
1309 struct ft_r0kh_r1kh_pull_frame *frame, f;
1310 struct ft_remote_r1kh *r1kh;
1311 struct ft_r0kh_r1kh_resp_frame resp, r;
1312 u8 pmk_r0[PMK_LEN];
1b484d60 1313 int pairwise;
6fc6879b
JM		 1314
1315 wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull");
1316
1317 if (data_len < sizeof(*frame))
1318 return -1;
1319
1320 r1kh = wpa_auth->conf.r1kh_list;
1321 while (r1kh) {
1322 if (os_memcmp(r1kh->addr, src_addr, ETH_ALEN) == 0)
1323 break;
1324 r1kh = r1kh->next;
1325 }
1326 if (r1kh == NULL) {
1327 wpa_printf(MSG_DEBUG, "FT: No matching R1KH address found for "
1328 "PMK-R1 pull source address " MACSTR,
1329 MAC2STR(src_addr));
1330 return -1;
1331 }
1332
1333 frame = (struct ft_r0kh_r1kh_pull_frame *) data;
1334 /* aes_unwrap() does not support inplace decryption, so use a temporary
1335 * buffer for the data. */
1336 if (aes_unwrap(r1kh->key, (FT_R0KH_R1KH_PULL_DATA_LEN + 7) / 8,
1337 frame->nonce, f.nonce) < 0) {
1338 wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 pull "
1339 "request from " MACSTR, MAC2STR(src_addr));
1340 return -1;
1341 }
1342
1343 wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - nonce",
1344 f.nonce, sizeof(f.nonce));
1345 wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - PMKR0Name",
1346 f.pmk_r0_name, WPA_PMK_NAME_LEN);
692ec305 1347 wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull - R1KH-ID=" MACSTR " S1KH-ID="
6fc6879b
JM		 1348 MACSTR, MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id));
1349
1350 os_memset(&resp, 0, sizeof(resp));
1351 resp.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1352 resp.packet_type = FT_PACKET_R0KH_R1KH_RESP;
1353 resp.data_length = host_to_le16(FT_R0KH_R1KH_RESP_DATA_LEN);
1354 os_memcpy(resp.ap_address, wpa_auth->addr, ETH_ALEN);
1355
1356 /* aes_wrap() does not support inplace encryption, so use a temporary
1357 * buffer for the data. */
1358 os_memcpy(r.nonce, f.nonce, sizeof(f.nonce));
1359 os_memcpy(r.r1kh_id, f.r1kh_id, FT_R1KH_ID_LEN);
1360 os_memcpy(r.s1kh_id, f.s1kh_id, ETH_ALEN);
1b484d60
JM		 1361 if (wpa_ft_fetch_pmk_r0(wpa_auth, f.s1kh_id, f.pmk_r0_name, pmk_r0,
1362 &pairwise) < 0) {
6fc6879b
JM		 1363 wpa_printf(MSG_DEBUG, "FT: No matching PMKR0Name found for "
1364 "PMK-R1 pull");
1365 return -1;
1366 }
1367
1368 wpa_derive_pmk_r1(pmk_r0, f.pmk_r0_name, f.r1kh_id, f.s1kh_id,
1369 r.pmk_r1, r.pmk_r1_name);
1370 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", r.pmk_r1, PMK_LEN);
1371 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", r.pmk_r1_name,
1372 WPA_PMK_NAME_LEN);
e9501a07 1373 r.pairwise = host_to_le16(pairwise);
5bcd5c5a 1374 os_memset(r.pad, 0, sizeof(r.pad));
6fc6879b
JM		 1375
1376 if (aes_wrap(r1kh->key, (FT_R0KH_R1KH_RESP_DATA_LEN + 7) / 8,
1377 r.nonce, resp.nonce) < 0) {
1378 os_memset(pmk_r0, 0, PMK_LEN);
1379 return -1;
1380 }
1381
1382 os_memset(pmk_r0, 0, PMK_LEN);
1383
1384 wpa_ft_rrb_send(wpa_auth, src_addr, (u8 *) &resp, sizeof(resp));
1385
1386 return 0;
1387}
1388
1389
692ec305
JM		 1390static void ft_pull_resp_cb_finish(void *eloop_ctx, void *timeout_ctx)
1391{
1392 struct wpa_state_machine *sm = eloop_ctx;
1393 int res;
1394 u8 *resp_ies;
1395 size_t resp_ies_len;
1396 u16 status;
1397
1398 res = wpa_ft_process_auth_req(sm, wpabuf_head(sm->ft_pending_req_ies),
1399 wpabuf_len(sm->ft_pending_req_ies),
1400 &resp_ies, &resp_ies_len);
1401 wpabuf_free(sm->ft_pending_req_ies);
1402 sm->ft_pending_req_ies = NULL;
1403 if (res < 0)
1404 res = WLAN_STATUS_UNSPECIFIED_FAILURE;
1405 status = res;
1406 wpa_printf(MSG_DEBUG, "FT: Postponed auth callback result for " MACSTR
1407 " - status %u", MAC2STR(sm->addr), status);
1408
1409 sm->ft_pending_cb(sm->ft_pending_cb_ctx, sm->addr, sm->wpa_auth->addr,
1410 sm->ft_pending_auth_transaction + 1, status,
1411 resp_ies, resp_ies_len);
1412 os_free(resp_ies);
1413}
1414
1415
1416static int ft_pull_resp_cb(struct wpa_state_machine *sm, void *ctx)
1417{
1418 struct ft_r0kh_r1kh_resp_frame *frame = ctx;
1419
1420 if (os_memcmp(frame->s1kh_id, sm->addr, ETH_ALEN) != 0)
1421 return 0;
1422 if (os_memcmp(frame->nonce, sm->ft_pending_pull_nonce,
1423 FT_R0KH_R1KH_PULL_NONCE_LEN) != 0)
1424 return 0;
1425 if (sm->ft_pending_cb == NULL || sm->ft_pending_req_ies == NULL)
1426 return 0;
1427
1428 wpa_printf(MSG_DEBUG, "FT: Response to a pending pull request for "
1429 MACSTR " - process from timeout", MAC2STR(sm->addr));
1430 eloop_register_timeout(0, 0, ft_pull_resp_cb_finish, sm, NULL);
1431 return 1;
1432}
1433
1434
6fc6879b
JM		 1435static int wpa_ft_rrb_rx_resp(struct wpa_authenticator *wpa_auth,
1436 const u8 *src_addr,
1437 const u8 *data, size_t data_len)
1438{
1439 struct ft_r0kh_r1kh_resp_frame *frame, f;
1440 struct ft_remote_r0kh *r0kh;
692ec305 1441 int pairwise, res;
6fc6879b
JM		 1442
1443 wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull response");
1444
1445 if (data_len < sizeof(*frame))
1446 return -1;
1447
1448 r0kh = wpa_auth->conf.r0kh_list;
1449 while (r0kh) {
1450 if (os_memcmp(r0kh->addr, src_addr, ETH_ALEN) == 0)
1451 break;
1452 r0kh = r0kh->next;
1453 }
1454 if (r0kh == NULL) {
1455 wpa_printf(MSG_DEBUG, "FT: No matching R0KH address found for "
1456 "PMK-R0 pull response source address " MACSTR,
1457 MAC2STR(src_addr));
1458 return -1;
1459 }
1460
1461 frame = (struct ft_r0kh_r1kh_resp_frame *) data;
1462 /* aes_unwrap() does not support inplace decryption, so use a temporary
1463 * buffer for the data. */
1464 if (aes_unwrap(r0kh->key, (FT_R0KH_R1KH_RESP_DATA_LEN + 7) / 8,
1465 frame->nonce, f.nonce) < 0) {
1466 wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 pull "
1467 "response from " MACSTR, MAC2STR(src_addr));
1468 return -1;
1469 }
1470
1471 if (os_memcmp(f.r1kh_id, wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN)
1472 != 0) {
1473 wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull response did not use a "
1474 "matching R1KH-ID");
1475 return -1;
1476 }
1477
1b484d60 1478 pairwise = le_to_host16(f.pairwise);
6fc6879b
JM		 1479 wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - nonce",
1480 f.nonce, sizeof(f.nonce));
692ec305 1481 wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull - R1KH-ID=" MACSTR " S1KH-ID="
1b484d60
JM		 1482 MACSTR " pairwise=0x%x",
1483 MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id), pairwise);
6fc6879b
JM		 1484 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1 pull - PMK-R1",
1485 f.pmk_r1, PMK_LEN);
1486 wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - PMKR1Name",
1487 f.pmk_r1_name, WPA_PMK_NAME_LEN);
1488
692ec305
JM		 1489 res = wpa_ft_store_pmk_r1(wpa_auth, f.s1kh_id, f.pmk_r1, f.pmk_r1_name,
1490 pairwise);
1491 wpa_printf(MSG_DEBUG, "FT: Look for pending pull request");
1492 wpa_auth_for_each_sta(wpa_auth, ft_pull_resp_cb, &f);
6fc6879b
JM		 1493 os_memset(f.pmk_r1, 0, PMK_LEN);
1494
692ec305 1495 return res ? 0 : -1;
6fc6879b
JM		 1496}
1497
1498
1499static int wpa_ft_rrb_rx_push(struct wpa_authenticator *wpa_auth,
1500 const u8 *src_addr,
1501 const u8 *data, size_t data_len)
1502{
1503 struct ft_r0kh_r1kh_push_frame *frame, f;
1504 struct ft_remote_r0kh *r0kh;
1505 struct os_time now;
1506 os_time_t tsend;
1b484d60 1507 int pairwise;
6fc6879b
JM		 1508
1509 wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 push");
1510
1511 if (data_len < sizeof(*frame))
1512 return -1;
1513
1514 r0kh = wpa_auth->conf.r0kh_list;
1515 while (r0kh) {
1516 if (os_memcmp(r0kh->addr, src_addr, ETH_ALEN) == 0)
1517 break;
1518 r0kh = r0kh->next;
1519 }
1520 if (r0kh == NULL) {
1521 wpa_printf(MSG_DEBUG, "FT: No matching R0KH address found for "
1522 "PMK-R0 push source address " MACSTR,
1523 MAC2STR(src_addr));
1524 return -1;
1525 }
1526
1527 frame = (struct ft_r0kh_r1kh_push_frame *) data;
1528 /* aes_unwrap() does not support inplace decryption, so use a temporary
1529 * buffer for the data. */
1530 if (aes_unwrap(r0kh->key, (FT_R0KH_R1KH_PUSH_DATA_LEN + 7) / 8,
1531 frame->timestamp, f.timestamp) < 0) {
1532 wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 push from "
1533 MACSTR, MAC2STR(src_addr));
1534 return -1;
1535 }
1536
1537 os_get_time(&now);
1538 tsend = WPA_GET_LE32(f.timestamp);
1539 if ((now.sec > tsend && now.sec - tsend > 60) ||
1540 (now.sec < tsend && tsend - now.sec > 60)) {
1541 wpa_printf(MSG_DEBUG, "FT: PMK-R1 push did not have a valid "
1542 "timestamp: sender time %d own time %d\n",
1543 (int) tsend, (int) now.sec);
1544 return -1;
1545 }
1546
1547 if (os_memcmp(f.r1kh_id, wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN)
1548 != 0) {
1549 wpa_printf(MSG_DEBUG, "FT: PMK-R1 push did not use a matching "
1550 "R1KH-ID (received " MACSTR " own " MACSTR ")",
1551 MAC2STR(f.r1kh_id),
1552 MAC2STR(wpa_auth->conf.r1_key_holder));
1553 return -1;
1554 }
1555
1b484d60 1556 pairwise = le_to_host16(f.pairwise);
6fc6879b 1557 wpa_printf(MSG_DEBUG, "FT: PMK-R1 push - R1KH-ID=" MACSTR " S1KH-ID="
1b484d60
JM		 1558 MACSTR " pairwise=0x%x",
1559 MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id), pairwise);
6fc6879b
JM		 1560 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1 push - PMK-R1",
1561 f.pmk_r1, PMK_LEN);
1562 wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 push - PMKR1Name",
1563 f.pmk_r1_name, WPA_PMK_NAME_LEN);
1564
1b484d60
JM		 1565 wpa_ft_store_pmk_r1(wpa_auth, f.s1kh_id, f.pmk_r1, f.pmk_r1_name,
1566 pairwise);
6fc6879b
JM		 1567 os_memset(f.pmk_r1, 0, PMK_LEN);
1568
1569 return 0;
1570}
1571
1572
1573int wpa_ft_rrb_rx(struct wpa_authenticator *wpa_auth, const u8 *src_addr,
1574 const u8 *data, size_t data_len)
1575{
1576 struct ft_rrb_frame *frame;
1577 u16 alen;
1578 const u8 *pos, *end, *start;
1579 u8 action;
1580 const u8 *sta_addr, *target_ap_addr;
1581
1582 wpa_printf(MSG_DEBUG, "FT: RRB received frame from remote AP " MACSTR,
1583 MAC2STR(src_addr));
1584
1585 if (data_len < sizeof(*frame)) {
1586 wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (data_len=%lu)",
1587 (unsigned long) data_len);
1588 return -1;
1589 }
1590
1591 pos = data;
1592 frame = (struct ft_rrb_frame *) pos;
1593 pos += sizeof(*frame);
1594
1595 alen = le_to_host16(frame->action_length);
1596 wpa_printf(MSG_DEBUG, "FT: RRB frame - frame_type=%d packet_type=%d "
1597 "action_length=%d ap_address=" MACSTR,
1598 frame->frame_type, frame->packet_type, alen,
1599 MAC2STR(frame->ap_address));
1600
1601 if (frame->frame_type != RSN_REMOTE_FRAME_TYPE_FT_RRB) {
c1e033b0 1602 /* Discard frame per IEEE Std 802.11r-2008, 11A.10.3 */
6fc6879b
JM		 1603 wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with "
1604 "unrecognized type %d", frame->frame_type);
1605 return -1;
1606 }
1607
1608 if (alen > data_len - sizeof(*frame)) {
1609 wpa_printf(MSG_DEBUG, "FT: RRB frame too short for action "
1610 "frame");
1611 return -1;
1612 }
1613
1614 if (frame->packet_type == FT_PACKET_R0KH_R1KH_PULL)
1615 return wpa_ft_rrb_rx_pull(wpa_auth, src_addr, data, data_len);
1616 if (frame->packet_type == FT_PACKET_R0KH_R1KH_RESP)
1617 return wpa_ft_rrb_rx_resp(wpa_auth, src_addr, data, data_len);
1618 if (frame->packet_type == FT_PACKET_R0KH_R1KH_PUSH)
1619 return wpa_ft_rrb_rx_push(wpa_auth, src_addr, data, data_len);
1620
1621 wpa_hexdump(MSG_MSGDUMP, "FT: RRB - FT Action frame", pos, alen);
1622
1623 if (alen < 1 + 1 + 2 * ETH_ALEN) {
1624 wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (not enough "
1625 "room for Action Frame body); alen=%lu",
1626 (unsigned long) alen);
1627 return -1;
1628 }
1629 start = pos;
1630 end = pos + alen;
1631
1632 if (*pos != WLAN_ACTION_FT) {
1633 wpa_printf(MSG_DEBUG, "FT: Unexpected Action frame category "
1634 "%d", *pos);
1635 return -1;
1636 }
1637
1638 pos++;
1639 action = *pos++;
1640 sta_addr = pos;
1641 pos += ETH_ALEN;
1642 target_ap_addr = pos;
1643 pos += ETH_ALEN;
1644 wpa_printf(MSG_DEBUG, "FT: RRB Action Frame: action=%d sta_addr="
1645 MACSTR " target_ap_addr=" MACSTR,
1646 action, MAC2STR(sta_addr), MAC2STR(target_ap_addr));
1647
1648 if (frame->packet_type == FT_PACKET_REQUEST) {
1649 wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Request");
1650
1651 if (action != 1) {
1652 wpa_printf(MSG_DEBUG, "FT: Unexpected Action %d in "
1653 "RRB Request", action);
1654 return -1;
1655 }
1656
1657 if (os_memcmp(target_ap_addr, wpa_auth->addr, ETH_ALEN) != 0) {
1658 wpa_printf(MSG_DEBUG, "FT: Target AP address in the "
1659 "RRB Request does not match with own "
1660 "address");
1661 return -1;
1662 }
1663
1664 if (wpa_ft_rrb_rx_request(wpa_auth, frame->ap_address,
1665 sta_addr, pos, end - pos) < 0)
1666 return -1;
1667 } else if (frame->packet_type == FT_PACKET_RESPONSE) {
1668 u16 status_code;
1669
1670 if (end - pos < 2) {
1671 wpa_printf(MSG_DEBUG, "FT: Not enough room for status "
1672 "code in RRB Response");
1673 return -1;
1674 }
1675 status_code = WPA_GET_LE16(pos);
1676 pos += 2;
1677
1678 wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Response "
1679 "(status_code=%d)", status_code);
1680
1681 if (wpa_ft_action_send(wpa_auth, sta_addr, start, alen) < 0)
1682 return -1;
1683 } else {
1684 wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with unknown "
1685 "packet_type %d", frame->packet_type);
1686 return -1;
1687 }
1688
1689 return 0;
1690}
1691
1692
1693static void wpa_ft_generate_pmk_r1(struct wpa_authenticator *wpa_auth,
1694 struct wpa_ft_pmk_r0_sa *pmk_r0,
1695 struct ft_remote_r1kh *r1kh,
1b484d60 1696 const u8 *s1kh_id, int pairwise)
6fc6879b
JM		 1697{
1698 struct ft_r0kh_r1kh_push_frame frame, f;
1699 struct os_time now;
1700
1701 os_memset(&frame, 0, sizeof(frame));
1702 frame.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1703 frame.packet_type = FT_PACKET_R0KH_R1KH_PUSH;
1704 frame.data_length = host_to_le16(FT_R0KH_R1KH_PUSH_DATA_LEN);
1705 os_memcpy(frame.ap_address, wpa_auth->addr, ETH_ALEN);
1706
1707 /* aes_wrap() does not support inplace encryption, so use a temporary
1708 * buffer for the data. */
1709 os_memcpy(f.r1kh_id, r1kh->id, FT_R1KH_ID_LEN);
1710 os_memcpy(f.s1kh_id, s1kh_id, ETH_ALEN);
1711 os_memcpy(f.pmk_r0_name, pmk_r0->pmk_r0_name, WPA_PMK_NAME_LEN);
1712 wpa_derive_pmk_r1(pmk_r0->pmk_r0, pmk_r0->pmk_r0_name, r1kh->id,
1713 s1kh_id, f.pmk_r1, f.pmk_r1_name);
1714 wpa_printf(MSG_DEBUG, "FT: R1KH-ID " MACSTR, MAC2STR(r1kh->id));
1715 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", f.pmk_r1, PMK_LEN);
1716 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", f.pmk_r1_name,
1717 WPA_PMK_NAME_LEN);
1718 os_get_time(&now);
1719 WPA_PUT_LE32(f.timestamp, now.sec);
e9501a07 1720 f.pairwise = host_to_le16(pairwise);
5bcd5c5a 1721 os_memset(f.pad, 0, sizeof(f.pad));
6fc6879b
JM		 1722 if (aes_wrap(r1kh->key, (FT_R0KH_R1KH_PUSH_DATA_LEN + 7) / 8,
1723 f.timestamp, frame.timestamp) < 0)
1724 return;
1725
1726 wpa_ft_rrb_send(wpa_auth, r1kh->addr, (u8 *) &frame, sizeof(frame));
1727}
1728
1729
1730void wpa_ft_push_pmk_r1(struct wpa_authenticator *wpa_auth, const u8 *addr)
1731{
1732 struct wpa_ft_pmk_r0_sa *r0;
1733 struct ft_remote_r1kh *r1kh;
1734
1735 if (!wpa_auth->conf.pmk_r1_push)
1736 return;
1737
1738 r0 = wpa_auth->ft_pmk_cache->pmk_r0;
1739 while (r0) {
1740 if (os_memcmp(r0->spa, addr, ETH_ALEN) == 0)
1741 break;
1742 r0 = r0->next;
1743 }
1744
1745 if (r0 == NULL || r0->pmk_r1_pushed)
1746 return;
1747 r0->pmk_r1_pushed = 1;
1748
1749 wpa_printf(MSG_DEBUG, "FT: Deriving and pushing PMK-R1 keys to R1KHs "
1750 "for STA " MACSTR, MAC2STR(addr));
1751
1752 r1kh = wpa_auth->conf.r1kh_list;
1753 while (r1kh) {
1b484d60 1754 wpa_ft_generate_pmk_r1(wpa_auth, r0, r1kh, addr, r0->pairwise);
6fc6879b
JM		 1755 r1kh = r1kh->next;
1756 }
1757}
1758
1759#endif /* CONFIG_IEEE80211R */
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