2 * hostapd - IEEE 802.11r - Fast BSS Transition
3 * Copyright (c) 2004-2015, Jouni Malinen <j@w1.fi>
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
9 #include "utils/includes.h"
11 #include "utils/common.h"
12 #include "utils/eloop.h"
13 #include "utils/list.h"
14 #include "common/ieee802_11_defs.h"
15 #include "common/ieee802_11_common.h"
16 #include "crypto/aes_wrap.h"
17 #include "crypto/random.h"
18 #include "ap_config.h"
19 #include "ieee802_11.h"
22 #include "wpa_auth_i.h"
25 #ifdef CONFIG_IEEE80211R
27 static int wpa_ft_send_rrb_auth_resp(struct wpa_state_machine *sm,
28 const u8 *current_ap, const u8 *sta_addr,
29 u16 status, const u8 *resp_ies,
33 static int wpa_ft_rrb_send(struct wpa_authenticator *wpa_auth, const u8 *dst,
34 const u8 *data, size_t data_len)
36 if (wpa_auth->cb.send_ether == NULL)
38 wpa_printf(MSG_DEBUG, "FT: RRB send to " MACSTR, MAC2STR(dst));
39 return wpa_auth->cb.send_ether(wpa_auth->cb.ctx, dst, ETH_P_RRB,
44 static int wpa_ft_action_send(struct wpa_authenticator *wpa_auth,
45 const u8 *dst, const u8 *data, size_t data_len)
47 if (wpa_auth->cb.send_ft_action == NULL)
49 return wpa_auth->cb.send_ft_action(wpa_auth->cb.ctx, dst,
54 static struct wpa_state_machine *
55 wpa_ft_add_sta(struct wpa_authenticator *wpa_auth, const u8 *sta_addr)
57 if (wpa_auth->cb.add_sta == NULL)
59 return wpa_auth->cb.add_sta(wpa_auth->cb.ctx, sta_addr);
63 static int wpa_ft_add_tspec(struct wpa_authenticator *wpa_auth,
65 u8 *tspec_ie, size_t tspec_ielen)
67 if (wpa_auth->cb.add_tspec == NULL) {
68 wpa_printf(MSG_DEBUG, "FT: add_tspec is not initialized");
71 return wpa_auth->cb.add_tspec(wpa_auth->cb.ctx, sta_addr, tspec_ie,
76 int wpa_write_mdie(struct wpa_auth_config *conf, u8 *buf, size_t len)
80 if (len < 2 + sizeof(struct rsn_mdie))
83 *pos++ = WLAN_EID_MOBILITY_DOMAIN;
84 *pos++ = MOBILITY_DOMAIN_ID_LEN + 1;
85 os_memcpy(pos, conf->mobility_domain, MOBILITY_DOMAIN_ID_LEN);
86 pos += MOBILITY_DOMAIN_ID_LEN;
89 capab |= RSN_FT_CAPAB_FT_OVER_DS;
96 int wpa_write_ftie(struct wpa_auth_config *conf, const u8 *r0kh_id,
98 const u8 *anonce, const u8 *snonce,
99 u8 *buf, size_t len, const u8 *subelem,
102 u8 *pos = buf, *ielen;
103 struct rsn_ftie *hdr;
105 if (len < 2 + sizeof(*hdr) + 2 + FT_R1KH_ID_LEN + 2 + r0kh_id_len +
109 *pos++ = WLAN_EID_FAST_BSS_TRANSITION;
112 hdr = (struct rsn_ftie *) pos;
113 os_memset(hdr, 0, sizeof(*hdr));
115 WPA_PUT_LE16(hdr->mic_control, 0);
117 os_memcpy(hdr->anonce, anonce, WPA_NONCE_LEN);
119 os_memcpy(hdr->snonce, snonce, WPA_NONCE_LEN);
121 /* Optional Parameters */
122 *pos++ = FTIE_SUBELEM_R1KH_ID;
123 *pos++ = FT_R1KH_ID_LEN;
124 os_memcpy(pos, conf->r1_key_holder, FT_R1KH_ID_LEN);
125 pos += FT_R1KH_ID_LEN;
128 *pos++ = FTIE_SUBELEM_R0KH_ID;
129 *pos++ = r0kh_id_len;
130 os_memcpy(pos, r0kh_id, r0kh_id_len);
135 os_memcpy(pos, subelem, subelem_len);
139 *ielen = pos - buf - 2;
145 struct wpa_ft_pmk_r0_sa {
146 struct wpa_ft_pmk_r0_sa *next;
148 u8 pmk_r0_name[WPA_PMK_NAME_LEN];
150 int pairwise; /* Pairwise cipher suite, WPA_CIPHER_* */
151 /* TODO: expiration, identity, radius_class, EAP type, VLAN ID */
155 struct wpa_ft_pmk_r1_sa {
156 struct wpa_ft_pmk_r1_sa *next;
158 u8 pmk_r1_name[WPA_PMK_NAME_LEN];
160 int pairwise; /* Pairwise cipher suite, WPA_CIPHER_* */
161 /* TODO: expiration, identity, radius_class, EAP type, VLAN ID */
164 struct wpa_ft_pmk_cache {
165 struct wpa_ft_pmk_r0_sa *pmk_r0;
166 struct wpa_ft_pmk_r1_sa *pmk_r1;
169 struct wpa_ft_pmk_cache * wpa_ft_pmk_cache_init(void)
171 struct wpa_ft_pmk_cache *cache;
173 cache = os_zalloc(sizeof(*cache));
179 void wpa_ft_pmk_cache_deinit(struct wpa_ft_pmk_cache *cache)
181 struct wpa_ft_pmk_r0_sa *r0, *r0prev;
182 struct wpa_ft_pmk_r1_sa *r1, *r1prev;
188 os_memset(r0prev->pmk_r0, 0, PMK_LEN);
196 os_memset(r1prev->pmk_r1, 0, PMK_LEN);
204 static int wpa_ft_store_pmk_r0(struct wpa_authenticator *wpa_auth,
205 const u8 *spa, const u8 *pmk_r0,
206 const u8 *pmk_r0_name, int pairwise)
208 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
209 struct wpa_ft_pmk_r0_sa *r0;
211 /* TODO: add expiration and limit on number of entries in cache */
213 r0 = os_zalloc(sizeof(*r0));
217 os_memcpy(r0->pmk_r0, pmk_r0, PMK_LEN);
218 os_memcpy(r0->pmk_r0_name, pmk_r0_name, WPA_PMK_NAME_LEN);
219 os_memcpy(r0->spa, spa, ETH_ALEN);
220 r0->pairwise = pairwise;
222 r0->next = cache->pmk_r0;
229 static int wpa_ft_fetch_pmk_r0(struct wpa_authenticator *wpa_auth,
230 const u8 *spa, const u8 *pmk_r0_name,
231 u8 *pmk_r0, int *pairwise)
233 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
234 struct wpa_ft_pmk_r0_sa *r0;
238 if (os_memcmp(r0->spa, spa, ETH_ALEN) == 0 &&
239 os_memcmp_const(r0->pmk_r0_name, pmk_r0_name,
240 WPA_PMK_NAME_LEN) == 0) {
241 os_memcpy(pmk_r0, r0->pmk_r0, PMK_LEN);
243 *pairwise = r0->pairwise;
254 static int wpa_ft_store_pmk_r1(struct wpa_authenticator *wpa_auth,
255 const u8 *spa, const u8 *pmk_r1,
256 const u8 *pmk_r1_name, int pairwise)
258 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
259 struct wpa_ft_pmk_r1_sa *r1;
261 /* TODO: add expiration and limit on number of entries in cache */
263 r1 = os_zalloc(sizeof(*r1));
267 os_memcpy(r1->pmk_r1, pmk_r1, PMK_LEN);
268 os_memcpy(r1->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN);
269 os_memcpy(r1->spa, spa, ETH_ALEN);
270 r1->pairwise = pairwise;
272 r1->next = cache->pmk_r1;
279 static int wpa_ft_fetch_pmk_r1(struct wpa_authenticator *wpa_auth,
280 const u8 *spa, const u8 *pmk_r1_name,
281 u8 *pmk_r1, int *pairwise)
283 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
284 struct wpa_ft_pmk_r1_sa *r1;
288 if (os_memcmp(r1->spa, spa, ETH_ALEN) == 0 &&
289 os_memcmp_const(r1->pmk_r1_name, pmk_r1_name,
290 WPA_PMK_NAME_LEN) == 0) {
291 os_memcpy(pmk_r1, r1->pmk_r1, PMK_LEN);
293 *pairwise = r1->pairwise;
304 static int wpa_ft_pull_pmk_r1(struct wpa_state_machine *sm,
305 const u8 *ies, size_t ies_len,
306 const u8 *pmk_r0_name)
308 struct ft_remote_r0kh *r0kh;
309 struct ft_r0kh_r1kh_pull_frame frame, f;
311 r0kh = sm->wpa_auth->conf.r0kh_list;
313 if (r0kh->id_len == sm->r0kh_id_len &&
314 os_memcmp_const(r0kh->id, sm->r0kh_id, sm->r0kh_id_len) ==
320 wpa_hexdump(MSG_DEBUG, "FT: Did not find R0KH-ID",
321 sm->r0kh_id, sm->r0kh_id_len);
325 wpa_printf(MSG_DEBUG, "FT: Send PMK-R1 pull request to remote R0KH "
326 "address " MACSTR, MAC2STR(r0kh->addr));
328 os_memset(&frame, 0, sizeof(frame));
329 frame.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
330 frame.packet_type = FT_PACKET_R0KH_R1KH_PULL;
331 frame.data_length = host_to_le16(FT_R0KH_R1KH_PULL_DATA_LEN);
332 os_memcpy(frame.ap_address, sm->wpa_auth->addr, ETH_ALEN);
334 /* aes_wrap() does not support inplace encryption, so use a temporary
335 * buffer for the data. */
336 if (random_get_bytes(f.nonce, FT_R0KH_R1KH_PULL_NONCE_LEN)) {
337 wpa_printf(MSG_DEBUG, "FT: Failed to get random data for "
341 os_memcpy(sm->ft_pending_pull_nonce, f.nonce,
342 FT_R0KH_R1KH_PULL_NONCE_LEN);
343 os_memcpy(f.pmk_r0_name, pmk_r0_name, WPA_PMK_NAME_LEN);
344 os_memcpy(f.r1kh_id, sm->wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN);
345 os_memcpy(f.s1kh_id, sm->addr, ETH_ALEN);
346 os_memset(f.pad, 0, sizeof(f.pad));
348 if (aes_wrap(r0kh->key, sizeof(r0kh->key),
349 (FT_R0KH_R1KH_PULL_DATA_LEN + 7) / 8,
350 f.nonce, frame.nonce) < 0)
353 wpabuf_free(sm->ft_pending_req_ies);
354 sm->ft_pending_req_ies = wpabuf_alloc_copy(ies, ies_len);
355 if (sm->ft_pending_req_ies == NULL)
358 wpa_ft_rrb_send(sm->wpa_auth, r0kh->addr, (u8 *) &frame, sizeof(frame));
364 int wpa_auth_derive_ptk_ft(struct wpa_state_machine *sm, const u8 *pmk,
367 u8 pmk_r0[PMK_LEN], pmk_r0_name[WPA_PMK_NAME_LEN];
369 u8 ptk_name[WPA_PMK_NAME_LEN];
370 const u8 *mdid = sm->wpa_auth->conf.mobility_domain;
371 const u8 *r0kh = sm->wpa_auth->conf.r0_key_holder;
372 size_t r0kh_len = sm->wpa_auth->conf.r0_key_holder_len;
373 const u8 *r1kh = sm->wpa_auth->conf.r1_key_holder;
374 const u8 *ssid = sm->wpa_auth->conf.ssid;
375 size_t ssid_len = sm->wpa_auth->conf.ssid_len;
377 if (sm->xxkey_len == 0) {
378 wpa_printf(MSG_DEBUG, "FT: XXKey not available for key "
383 wpa_derive_pmk_r0(sm->xxkey, sm->xxkey_len, ssid, ssid_len, mdid,
384 r0kh, r0kh_len, sm->addr, pmk_r0, pmk_r0_name);
385 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R0", pmk_r0, PMK_LEN);
386 wpa_hexdump(MSG_DEBUG, "FT: PMKR0Name", pmk_r0_name, WPA_PMK_NAME_LEN);
387 wpa_ft_store_pmk_r0(sm->wpa_auth, sm->addr, pmk_r0, pmk_r0_name,
390 wpa_derive_pmk_r1(pmk_r0, pmk_r0_name, r1kh, sm->addr,
391 pmk_r1, sm->pmk_r1_name);
392 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", pmk_r1, PMK_LEN);
393 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", sm->pmk_r1_name,
395 wpa_ft_store_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1, sm->pmk_r1_name,
398 return wpa_pmk_r1_to_ptk(pmk_r1, sm->SNonce, sm->ANonce, sm->addr,
399 sm->wpa_auth->addr, sm->pmk_r1_name,
400 ptk, ptk_name, sm->wpa_key_mgmt, sm->pairwise);
404 static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
405 const u8 *addr, int idx, u8 *seq)
407 if (wpa_auth->cb.get_seqnum == NULL)
409 return wpa_auth->cb.get_seqnum(wpa_auth->cb.ctx, addr, idx, seq);
413 static u8 * wpa_ft_gtk_subelem(struct wpa_state_machine *sm, size_t *len)
416 struct wpa_group *gsm = sm->group;
417 size_t subelem_len, pad_len;
422 key_len = gsm->GTK_len;
423 if (key_len > sizeof(keybuf))
427 * Pad key for AES Key Wrap if it is not multiple of 8 bytes or is less
430 pad_len = key_len % 8;
432 pad_len = 8 - pad_len;
433 if (key_len + pad_len < 16)
435 if (pad_len && key_len < sizeof(keybuf)) {
436 os_memcpy(keybuf, gsm->GTK[gsm->GN - 1], key_len);
437 os_memset(keybuf + key_len, 0, pad_len);
438 keybuf[key_len] = 0xdd;
442 key = gsm->GTK[gsm->GN - 1];
445 * Sub-elem ID[1] | Length[1] | Key Info[2] | Key Length[1] | RSC[8] |
448 subelem_len = 13 + key_len + 8;
449 subelem = os_zalloc(subelem_len);
453 subelem[0] = FTIE_SUBELEM_GTK;
454 subelem[1] = 11 + key_len + 8;
455 /* Key ID in B0-B1 of Key Info */
456 WPA_PUT_LE16(&subelem[2], gsm->GN & 0x03);
457 subelem[4] = gsm->GTK_len;
458 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, subelem + 5);
459 if (aes_wrap(sm->PTK.kek, sm->PTK.kek_len, key_len / 8, key,
470 #ifdef CONFIG_IEEE80211W
471 static u8 * wpa_ft_igtk_subelem(struct wpa_state_machine *sm, size_t *len)
474 struct wpa_group *gsm = sm->group;
477 /* Sub-elem ID[1] | Length[1] | KeyID[2] | IPN[6] | Key Length[1] |
479 subelem_len = 1 + 1 + 2 + 6 + 1 + WPA_IGTK_LEN + 8;
480 subelem = os_zalloc(subelem_len);
485 *pos++ = FTIE_SUBELEM_IGTK;
486 *pos++ = subelem_len - 2;
487 WPA_PUT_LE16(pos, gsm->GN_igtk);
489 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos);
491 *pos++ = WPA_IGTK_LEN;
492 if (aes_wrap(sm->PTK.kek, sm->PTK.kek_len, WPA_IGTK_LEN / 8,
493 gsm->IGTK[gsm->GN_igtk - 4], pos)) {
501 #endif /* CONFIG_IEEE80211W */
504 static u8 * wpa_ft_process_rdie(struct wpa_state_machine *sm,
505 u8 *pos, u8 *end, u8 id, u8 descr_count,
506 const u8 *ies, size_t ies_len)
508 struct ieee802_11_elems parse;
509 struct rsn_rdie *rdie;
511 wpa_printf(MSG_DEBUG, "FT: Resource Request: id=%d descr_count=%d",
513 wpa_hexdump(MSG_MSGDUMP, "FT: Resource descriptor IE(s)",
516 if (end - pos < (int) sizeof(*rdie)) {
517 wpa_printf(MSG_ERROR, "FT: Not enough room for response RDIE");
521 *pos++ = WLAN_EID_RIC_DATA;
522 *pos++ = sizeof(*rdie);
523 rdie = (struct rsn_rdie *) pos;
525 rdie->descr_count = 0;
526 rdie->status_code = host_to_le16(WLAN_STATUS_SUCCESS);
527 pos += sizeof(*rdie);
529 if (ieee802_11_parse_elems((u8 *) ies, ies_len, &parse, 1) ==
531 wpa_printf(MSG_DEBUG, "FT: Failed to parse request IEs");
533 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
537 if (parse.wmm_tspec) {
538 struct wmm_tspec_element *tspec;
540 if (parse.wmm_tspec_len + 2 < (int) sizeof(*tspec)) {
541 wpa_printf(MSG_DEBUG, "FT: Too short WMM TSPEC IE "
542 "(%d)", (int) parse.wmm_tspec_len);
544 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
547 if (end - pos < (int) sizeof(*tspec)) {
548 wpa_printf(MSG_ERROR, "FT: Not enough room for "
551 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
554 tspec = (struct wmm_tspec_element *) pos;
555 os_memcpy(tspec, parse.wmm_tspec - 2, sizeof(*tspec));
559 if (parse.wmm_tspec && sm->wpa_auth->conf.ap_mlme) {
562 res = wmm_process_tspec((struct wmm_tspec_element *) pos);
563 wpa_printf(MSG_DEBUG, "FT: ADDTS processing result: %d", res);
564 if (res == WMM_ADDTS_STATUS_INVALID_PARAMETERS)
566 host_to_le16(WLAN_STATUS_INVALID_PARAMETERS);
567 else if (res == WMM_ADDTS_STATUS_REFUSED)
569 host_to_le16(WLAN_STATUS_REQUEST_DECLINED);
571 /* TSPEC accepted; include updated TSPEC in response */
572 rdie->descr_count = 1;
573 pos += sizeof(struct wmm_tspec_element);
577 #endif /* NEED_AP_MLME */
579 if (parse.wmm_tspec && !sm->wpa_auth->conf.ap_mlme) {
582 res = wpa_ft_add_tspec(sm->wpa_auth, sm->addr, pos,
583 sizeof(struct wmm_tspec_element));
586 rdie->status_code = host_to_le16(res);
588 /* TSPEC accepted; include updated TSPEC in
590 rdie->descr_count = 1;
591 pos += sizeof(struct wmm_tspec_element);
597 wpa_printf(MSG_DEBUG, "FT: No supported resource requested");
598 rdie->status_code = host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
603 static u8 * wpa_ft_process_ric(struct wpa_state_machine *sm, u8 *pos, u8 *end,
604 const u8 *ric, size_t ric_len)
606 const u8 *rpos, *start;
607 const struct rsn_rdie *rdie;
609 wpa_hexdump(MSG_MSGDUMP, "FT: RIC Request", ric, ric_len);
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)
616 rdie = (const struct rsn_rdie *) (rpos + 2);
620 while (rpos + 2 <= ric + ric_len &&
621 rpos + 2 + rpos[1] <= ric + ric_len) {
622 if (rpos[0] == WLAN_EID_RIC_DATA)
626 pos = wpa_ft_process_rdie(sm, pos, end, rdie->id,
628 start, rpos - start);
635 u8 * wpa_sm_write_assoc_resp_ies(struct wpa_state_machine *sm, u8 *pos,
636 size_t max_len, int auth_alg,
637 const u8 *req_ies, size_t req_ies_len)
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;
642 struct wpa_auth_config *conf;
643 struct rsn_ftie *_ftie;
644 struct wpa_ft_ies parse;
651 conf = &sm->wpa_auth->conf;
653 if (!wpa_key_mgmt_ft(sm->wpa_key_mgmt))
658 if (auth_alg == WLAN_AUTH_FT) {
660 * RSN (only present if this is a Reassociation Response and
661 * part of a fast BSS transition)
663 res = wpa_write_rsn_ie(conf, pos, end - pos, sm->pmk_r1_name);
671 /* Mobility Domain Information */
672 res = wpa_write_mdie(conf, pos, end - pos);
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;
686 #ifdef CONFIG_IEEE80211W
687 if (sm->mgmt_frame_prot) {
691 igtk = wpa_ft_igtk_subelem(sm, &igtk_len);
696 nbuf = os_realloc(subelem, subelem_len + igtk_len);
703 os_memcpy(subelem + subelem_len, igtk, igtk_len);
704 subelem_len += igtk_len;
707 #endif /* CONFIG_IEEE80211W */
709 r0kh_id = conf->r0_key_holder;
710 r0kh_id_len = conf->r0_key_holder_len;
714 res = wpa_write_ftie(conf, r0kh_id, r0kh_id_len, anonce, snonce, pos,
715 end - pos, subelem, subelem_len);
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);
728 _ftie = (struct rsn_ftie *) (ftie + 2);
729 if (auth_alg == WLAN_AUTH_FT)
730 _ftie->mic_control[1] = 3; /* Information element count */
733 if (wpa_ft_parse_ies(req_ies, req_ies_len, &parse) == 0 && parse.ric) {
734 pos = wpa_ft_process_ric(sm, pos, end, parse.ric,
736 if (auth_alg == WLAN_AUTH_FT)
737 _ftie->mic_control[1] +=
738 ieee802_11_ie_count(ric_start,
741 if (ric_start == pos)
744 if (auth_alg == WLAN_AUTH_FT &&
745 wpa_ft_mic(sm->PTK.kck, sm->PTK.kck_len, sm->addr,
746 sm->wpa_auth->addr, 6,
747 mdie, mdie_len, ftie, ftie_len,
749 ric_start, ric_start ? pos - ric_start : 0,
751 wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC");
757 static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
759 enum wpa_alg alg, const u8 *addr, int idx,
760 u8 *key, size_t key_len)
762 if (wpa_auth->cb.set_key == NULL)
764 return wpa_auth->cb.set_key(wpa_auth->cb.ctx, vlan_id, alg, addr, idx,
769 void wpa_ft_install_ptk(struct wpa_state_machine *sm)
774 /* MLME-SETKEYS.request(PTK) */
775 alg = wpa_cipher_to_alg(sm->pairwise);
776 klen = wpa_cipher_key_len(sm->pairwise);
777 if (!wpa_cipher_valid_pairwise(sm->pairwise)) {
778 wpa_printf(MSG_DEBUG, "FT: Unknown pairwise alg 0x%x - skip "
779 "PTK configuration", sm->pairwise);
783 /* FIX: add STA entry to kernel/driver here? The set_key will fail
784 * most likely without this.. At the moment, STA entry is added only
785 * after association has been completed. This function will be called
786 * again after association to get the PTK configured, but that could be
787 * optimized by adding the STA entry earlier.
789 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
793 /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
794 sm->pairwise_set = TRUE;
798 static int wpa_ft_process_auth_req(struct wpa_state_machine *sm,
799 const u8 *ies, size_t ies_len,
800 u8 **resp_ies, size_t *resp_ies_len)
802 struct rsn_mdie *mdie;
803 struct rsn_ftie *ftie;
804 u8 pmk_r1[PMK_LEN], pmk_r1_name[WPA_PMK_NAME_LEN];
805 u8 ptk_name[WPA_PMK_NAME_LEN];
806 struct wpa_auth_config *conf;
807 struct wpa_ft_ies parse;
816 sm->pmk_r1_name_valid = 0;
817 conf = &sm->wpa_auth->conf;
819 wpa_hexdump(MSG_DEBUG, "FT: Received authentication frame IEs",
822 if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) {
823 wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs");
824 return WLAN_STATUS_UNSPECIFIED_FAILURE;
827 mdie = (struct rsn_mdie *) parse.mdie;
828 if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
829 os_memcmp(mdie->mobility_domain,
830 sm->wpa_auth->conf.mobility_domain,
831 MOBILITY_DOMAIN_ID_LEN) != 0) {
832 wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
833 return WLAN_STATUS_INVALID_MDIE;
836 ftie = (struct rsn_ftie *) parse.ftie;
837 if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
838 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
839 return WLAN_STATUS_INVALID_FTIE;
842 os_memcpy(sm->SNonce, ftie->snonce, WPA_NONCE_LEN);
844 if (parse.r0kh_id == NULL) {
845 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE - no R0KH-ID");
846 return WLAN_STATUS_INVALID_FTIE;
849 wpa_hexdump(MSG_DEBUG, "FT: STA R0KH-ID",
850 parse.r0kh_id, parse.r0kh_id_len);
851 os_memcpy(sm->r0kh_id, parse.r0kh_id, parse.r0kh_id_len);
852 sm->r0kh_id_len = parse.r0kh_id_len;
854 if (parse.rsn_pmkid == NULL) {
855 wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE");
856 return WLAN_STATUS_INVALID_PMKID;
859 wpa_hexdump(MSG_DEBUG, "FT: Requested PMKR0Name",
860 parse.rsn_pmkid, WPA_PMK_NAME_LEN);
861 wpa_derive_pmk_r1_name(parse.rsn_pmkid,
862 sm->wpa_auth->conf.r1_key_holder, sm->addr,
864 wpa_hexdump(MSG_DEBUG, "FT: Derived requested PMKR1Name",
865 pmk_r1_name, WPA_PMK_NAME_LEN);
867 if (wpa_ft_fetch_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1_name, pmk_r1,
869 if (wpa_ft_pull_pmk_r1(sm, ies, ies_len, parse.rsn_pmkid) < 0) {
870 wpa_printf(MSG_DEBUG, "FT: Did not have matching "
871 "PMK-R1 and unknown R0KH-ID");
872 return WLAN_STATUS_INVALID_PMKID;
875 return -1; /* Status pending */
878 wpa_hexdump_key(MSG_DEBUG, "FT: Selected PMK-R1", pmk_r1, PMK_LEN);
879 sm->pmk_r1_name_valid = 1;
880 os_memcpy(sm->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN);
882 if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) {
883 wpa_printf(MSG_DEBUG, "FT: Failed to get random data for "
885 return WLAN_STATUS_UNSPECIFIED_FAILURE;
888 wpa_hexdump(MSG_DEBUG, "FT: Received SNonce",
889 sm->SNonce, WPA_NONCE_LEN);
890 wpa_hexdump(MSG_DEBUG, "FT: Generated ANonce",
891 sm->ANonce, WPA_NONCE_LEN);
893 if (wpa_pmk_r1_to_ptk(pmk_r1, sm->SNonce, sm->ANonce, sm->addr,
894 sm->wpa_auth->addr, pmk_r1_name,
895 &sm->PTK, ptk_name, sm->wpa_key_mgmt,
897 return WLAN_STATUS_UNSPECIFIED_FAILURE;
899 sm->pairwise = pairwise;
900 sm->PTK_valid = TRUE;
901 wpa_ft_install_ptk(sm);
903 buflen = 2 + sizeof(struct rsn_mdie) + 2 + sizeof(struct rsn_ftie) +
904 2 + FT_R1KH_ID_LEN + 200;
905 *resp_ies = os_zalloc(buflen);
906 if (*resp_ies == NULL) {
907 return WLAN_STATUS_UNSPECIFIED_FAILURE;
911 end = *resp_ies + buflen;
913 ret = wpa_write_rsn_ie(conf, pos, end - pos, parse.rsn_pmkid);
917 return WLAN_STATUS_UNSPECIFIED_FAILURE;
921 ret = wpa_write_mdie(conf, pos, end - pos);
925 return WLAN_STATUS_UNSPECIFIED_FAILURE;
929 ret = wpa_write_ftie(conf, parse.r0kh_id, parse.r0kh_id_len,
930 sm->ANonce, sm->SNonce, pos, end - pos, NULL, 0);
934 return WLAN_STATUS_UNSPECIFIED_FAILURE;
938 *resp_ies_len = pos - *resp_ies;
940 return WLAN_STATUS_SUCCESS;
944 void wpa_ft_process_auth(struct wpa_state_machine *sm, const u8 *bssid,
945 u16 auth_transaction, const u8 *ies, size_t ies_len,
946 void (*cb)(void *ctx, const u8 *dst, const u8 *bssid,
947 u16 auth_transaction, u16 status,
948 const u8 *ies, size_t ies_len),
957 wpa_printf(MSG_DEBUG, "FT: Received authentication frame, but "
958 "WPA SM not available");
962 wpa_printf(MSG_DEBUG, "FT: Received authentication frame: STA=" MACSTR
963 " BSSID=" MACSTR " transaction=%d",
964 MAC2STR(sm->addr), MAC2STR(bssid), auth_transaction);
965 sm->ft_pending_cb = cb;
966 sm->ft_pending_cb_ctx = ctx;
967 sm->ft_pending_auth_transaction = auth_transaction;
968 res = wpa_ft_process_auth_req(sm, ies, ies_len, &resp_ies,
971 wpa_printf(MSG_DEBUG, "FT: Callback postponed until response is available");
976 wpa_printf(MSG_DEBUG, "FT: FT authentication response: dst=" MACSTR
977 " auth_transaction=%d status=%d",
978 MAC2STR(sm->addr), auth_transaction + 1, status);
979 wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len);
980 cb(ctx, sm->addr, bssid, auth_transaction + 1, status,
981 resp_ies, resp_ies_len);
986 u16 wpa_ft_validate_reassoc(struct wpa_state_machine *sm, const u8 *ies,
989 struct wpa_ft_ies parse;
990 struct rsn_mdie *mdie;
991 struct rsn_ftie *ftie;
992 u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN];
997 return WLAN_STATUS_UNSPECIFIED_FAILURE;
999 wpa_hexdump(MSG_DEBUG, "FT: Reassoc Req IEs", ies, ies_len);
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;
1006 if (parse.rsn == NULL) {
1007 wpa_printf(MSG_DEBUG, "FT: No RSNIE in Reassoc Req");
1008 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1011 if (parse.rsn_pmkid == NULL) {
1012 wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE");
1013 return WLAN_STATUS_INVALID_PMKID;
1016 if (os_memcmp_const(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN)
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;
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;
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;
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);
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);
1057 if (parse.r0kh_id == NULL) {
1058 wpa_printf(MSG_DEBUG, "FT: No R0KH-ID subelem in FTIE");
1062 if (parse.r0kh_id_len != sm->r0kh_id_len ||
1063 os_memcmp_const(parse.r0kh_id, sm->r0kh_id, parse.r0kh_id_len) != 0)
1065 wpa_printf(MSG_DEBUG, "FT: R0KH-ID in FTIE did not match with "
1066 "the current R0KH-ID");
1067 wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID in FTIE",
1068 parse.r0kh_id, parse.r0kh_id_len);
1069 wpa_hexdump(MSG_DEBUG, "FT: The current R0KH-ID",
1070 sm->r0kh_id, sm->r0kh_id_len);
1074 if (parse.r1kh_id == NULL) {
1075 wpa_printf(MSG_DEBUG, "FT: No R1KH-ID subelem in FTIE");
1079 if (os_memcmp_const(parse.r1kh_id, sm->wpa_auth->conf.r1_key_holder,
1080 FT_R1KH_ID_LEN) != 0) {
1081 wpa_printf(MSG_DEBUG, "FT: Unknown R1KH-ID used in "
1083 wpa_hexdump(MSG_DEBUG, "FT: R1KH-ID in FTIE",
1084 parse.r1kh_id, FT_R1KH_ID_LEN);
1085 wpa_hexdump(MSG_DEBUG, "FT: Expected R1KH-ID",
1086 sm->wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN);
1090 if (parse.rsn_pmkid == NULL ||
1091 os_memcmp_const(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN))
1093 wpa_printf(MSG_DEBUG, "FT: No matching PMKR1Name (PMKID) in "
1094 "RSNIE (pmkid=%d)", !!parse.rsn_pmkid);
1100 count += ieee802_11_ie_count(parse.ric, parse.ric_len);
1101 if (ftie->mic_control[1] != count) {
1102 wpa_printf(MSG_DEBUG, "FT: Unexpected IE count in MIC "
1103 "Control: received %u expected %u",
1104 ftie->mic_control[1], count);
1108 if (wpa_ft_mic(sm->PTK.kck, sm->PTK.kck_len, sm->addr,
1109 sm->wpa_auth->addr, 5,
1110 parse.mdie - 2, parse.mdie_len + 2,
1111 parse.ftie - 2, parse.ftie_len + 2,
1112 parse.rsn - 2, parse.rsn_len + 2,
1113 parse.ric, parse.ric_len,
1115 wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC");
1116 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1119 if (os_memcmp_const(mic, ftie->mic, mic_len) != 0) {
1120 wpa_printf(MSG_DEBUG, "FT: Invalid MIC in FTIE");
1121 wpa_printf(MSG_DEBUG, "FT: addr=" MACSTR " auth_addr=" MACSTR,
1122 MAC2STR(sm->addr), MAC2STR(sm->wpa_auth->addr));
1123 wpa_hexdump(MSG_MSGDUMP, "FT: Received MIC",
1124 ftie->mic, mic_len);
1125 wpa_hexdump(MSG_MSGDUMP, "FT: Calculated MIC", mic, mic_len);
1126 wpa_hexdump(MSG_MSGDUMP, "FT: MDIE",
1127 parse.mdie - 2, parse.mdie_len + 2);
1128 wpa_hexdump(MSG_MSGDUMP, "FT: FTIE",
1129 parse.ftie - 2, parse.ftie_len + 2);
1130 wpa_hexdump(MSG_MSGDUMP, "FT: RSN",
1131 parse.rsn - 2, parse.rsn_len + 2);
1132 return WLAN_STATUS_INVALID_FTIE;
1135 return WLAN_STATUS_SUCCESS;
1139 int wpa_ft_action_rx(struct wpa_state_machine *sm, const u8 *data, size_t len)
1141 const u8 *sta_addr, *target_ap;
1145 struct ft_rrb_frame *frame;
1151 * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6]
1152 * FT Request action frame body[variable]
1156 wpa_printf(MSG_DEBUG, "FT: Too short FT Action frame "
1157 "(len=%lu)", (unsigned long) len);
1162 sta_addr = data + 2;
1163 target_ap = data + 8;
1167 wpa_printf(MSG_DEBUG, "FT: Received FT Action frame (STA=" MACSTR
1168 " Target AP=" MACSTR " Action=%d)",
1169 MAC2STR(sta_addr), MAC2STR(target_ap), action);
1171 if (os_memcmp(sta_addr, sm->addr, ETH_ALEN) != 0) {
1172 wpa_printf(MSG_DEBUG, "FT: Mismatch in FT Action STA address: "
1173 "STA=" MACSTR " STA-Address=" MACSTR,
1174 MAC2STR(sm->addr), MAC2STR(sta_addr));
1179 * Do some sanity checking on the target AP address (not own and not
1180 * broadcast. This could be extended to filter based on a list of known
1181 * APs in the MD (if such a list were configured).
1183 if ((target_ap[0] & 0x01) ||
1184 os_memcmp(target_ap, sm->wpa_auth->addr, ETH_ALEN) == 0) {
1185 wpa_printf(MSG_DEBUG, "FT: Invalid Target AP in FT Action "
1190 wpa_hexdump(MSG_MSGDUMP, "FT: Action frame body", ies, ies_len);
1192 /* RRB - Forward action frame to the target AP */
1193 frame = os_malloc(sizeof(*frame) + len);
1196 frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1197 frame->packet_type = FT_PACKET_REQUEST;
1198 frame->action_length = host_to_le16(len);
1199 os_memcpy(frame->ap_address, sm->wpa_auth->addr, ETH_ALEN);
1200 os_memcpy(frame + 1, data, len);
1202 wpa_ft_rrb_send(sm->wpa_auth, target_ap, (u8 *) frame,
1203 sizeof(*frame) + len);
1210 static void wpa_ft_rrb_rx_request_cb(void *ctx, const u8 *dst, const u8 *bssid,
1211 u16 auth_transaction, u16 resp,
1212 const u8 *ies, size_t ies_len)
1214 struct wpa_state_machine *sm = ctx;
1215 wpa_printf(MSG_DEBUG, "FT: Over-the-DS RX request cb for " MACSTR,
1217 wpa_ft_send_rrb_auth_resp(sm, sm->ft_pending_current_ap, sm->addr,
1218 WLAN_STATUS_SUCCESS, ies, ies_len);
1222 static int wpa_ft_rrb_rx_request(struct wpa_authenticator *wpa_auth,
1223 const u8 *current_ap, const u8 *sta_addr,
1224 const u8 *body, size_t len)
1226 struct wpa_state_machine *sm;
1229 size_t resp_ies_len;
1232 sm = wpa_ft_add_sta(wpa_auth, sta_addr);
1234 wpa_printf(MSG_DEBUG, "FT: Failed to add new STA based on "
1239 wpa_hexdump(MSG_MSGDUMP, "FT: RRB Request Frame body", body, len);
1241 sm->ft_pending_cb = wpa_ft_rrb_rx_request_cb;
1242 sm->ft_pending_cb_ctx = sm;
1243 os_memcpy(sm->ft_pending_current_ap, current_ap, ETH_ALEN);
1244 res = wpa_ft_process_auth_req(sm, body, len, &resp_ies,
1247 wpa_printf(MSG_DEBUG, "FT: No immediate response available - wait for pull response");
1252 res = wpa_ft_send_rrb_auth_resp(sm, current_ap, sta_addr, status,
1253 resp_ies, resp_ies_len);
1259 static int wpa_ft_send_rrb_auth_resp(struct wpa_state_machine *sm,
1260 const u8 *current_ap, const u8 *sta_addr,
1261 u16 status, const u8 *resp_ies,
1262 size_t resp_ies_len)
1264 struct wpa_authenticator *wpa_auth = sm->wpa_auth;
1266 struct ft_rrb_frame *frame;
1269 wpa_printf(MSG_DEBUG, "FT: RRB authentication response: STA=" MACSTR
1270 " CurrentAP=" MACSTR " status=%d",
1271 MAC2STR(sm->addr), MAC2STR(current_ap), status);
1272 wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len);
1274 /* RRB - Forward action frame response to the Current AP */
1277 * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6]
1278 * Status_Code[2] FT Request action frame body[variable]
1280 rlen = 2 + 2 * ETH_ALEN + 2 + resp_ies_len;
1282 frame = os_malloc(sizeof(*frame) + rlen);
1285 frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1286 frame->packet_type = FT_PACKET_RESPONSE;
1287 frame->action_length = host_to_le16(rlen);
1288 os_memcpy(frame->ap_address, wpa_auth->addr, ETH_ALEN);
1289 pos = (u8 *) (frame + 1);
1290 *pos++ = WLAN_ACTION_FT;
1291 *pos++ = 2; /* Action: Response */
1292 os_memcpy(pos, sta_addr, ETH_ALEN);
1294 os_memcpy(pos, wpa_auth->addr, ETH_ALEN);
1296 WPA_PUT_LE16(pos, status);
1299 os_memcpy(pos, resp_ies, resp_ies_len);
1301 wpa_ft_rrb_send(wpa_auth, current_ap, (u8 *) frame,
1302 sizeof(*frame) + rlen);
1309 static int wpa_ft_rrb_rx_pull(struct wpa_authenticator *wpa_auth,
1311 const u8 *data, size_t data_len)
1313 struct ft_r0kh_r1kh_pull_frame f;
1316 struct ft_remote_r1kh *r1kh;
1317 struct ft_r0kh_r1kh_resp_frame resp, r;
1321 wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull");
1323 if (data_len < sizeof(f))
1326 r1kh = wpa_auth->conf.r1kh_list;
1328 if (os_memcmp(r1kh->addr, src_addr, ETH_ALEN) == 0)
1333 wpa_printf(MSG_DEBUG, "FT: No matching R1KH address found for "
1334 "PMK-R1 pull source address " MACSTR,
1339 crypt = data + offsetof(struct ft_r0kh_r1kh_pull_frame, nonce);
1340 os_memset(&f, 0, sizeof(f));
1341 plain = ((u8 *) &f) + offsetof(struct ft_r0kh_r1kh_pull_frame, nonce);
1342 /* aes_unwrap() does not support inplace decryption, so use a temporary
1343 * buffer for the data. */
1344 if (aes_unwrap(r1kh->key, sizeof(r1kh->key),
1345 (FT_R0KH_R1KH_PULL_DATA_LEN + 7) / 8,
1346 crypt, plain) < 0) {
1347 wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 pull "
1348 "request from " MACSTR, MAC2STR(src_addr));
1352 wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - nonce",
1353 f.nonce, sizeof(f.nonce));
1354 wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - PMKR0Name",
1355 f.pmk_r0_name, WPA_PMK_NAME_LEN);
1356 wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull - R1KH-ID=" MACSTR " S1KH-ID="
1357 MACSTR, MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id));
1359 os_memset(&resp, 0, sizeof(resp));
1360 resp.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1361 resp.packet_type = FT_PACKET_R0KH_R1KH_RESP;
1362 resp.data_length = host_to_le16(FT_R0KH_R1KH_RESP_DATA_LEN);
1363 os_memcpy(resp.ap_address, wpa_auth->addr, ETH_ALEN);
1365 /* aes_wrap() does not support inplace encryption, so use a temporary
1366 * buffer for the data. */
1367 os_memcpy(r.nonce, f.nonce, sizeof(f.nonce));
1368 os_memcpy(r.r1kh_id, f.r1kh_id, FT_R1KH_ID_LEN);
1369 os_memcpy(r.s1kh_id, f.s1kh_id, ETH_ALEN);
1370 if (wpa_ft_fetch_pmk_r0(wpa_auth, f.s1kh_id, f.pmk_r0_name, pmk_r0,
1372 wpa_printf(MSG_DEBUG, "FT: No matching PMKR0Name found for "
1377 wpa_derive_pmk_r1(pmk_r0, f.pmk_r0_name, f.r1kh_id, f.s1kh_id,
1378 r.pmk_r1, r.pmk_r1_name);
1379 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", r.pmk_r1, PMK_LEN);
1380 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", r.pmk_r1_name,
1382 r.pairwise = host_to_le16(pairwise);
1383 os_memset(r.pad, 0, sizeof(r.pad));
1385 if (aes_wrap(r1kh->key, sizeof(r1kh->key),
1386 (FT_R0KH_R1KH_RESP_DATA_LEN + 7) / 8,
1387 r.nonce, resp.nonce) < 0) {
1388 os_memset(pmk_r0, 0, PMK_LEN);
1392 os_memset(pmk_r0, 0, PMK_LEN);
1394 wpa_ft_rrb_send(wpa_auth, src_addr, (u8 *) &resp, sizeof(resp));
1400 static void ft_pull_resp_cb_finish(void *eloop_ctx, void *timeout_ctx)
1402 struct wpa_state_machine *sm = eloop_ctx;
1405 size_t resp_ies_len;
1408 res = wpa_ft_process_auth_req(sm, wpabuf_head(sm->ft_pending_req_ies),
1409 wpabuf_len(sm->ft_pending_req_ies),
1410 &resp_ies, &resp_ies_len);
1411 wpabuf_free(sm->ft_pending_req_ies);
1412 sm->ft_pending_req_ies = NULL;
1414 res = WLAN_STATUS_UNSPECIFIED_FAILURE;
1416 wpa_printf(MSG_DEBUG, "FT: Postponed auth callback result for " MACSTR
1417 " - status %u", MAC2STR(sm->addr), status);
1419 sm->ft_pending_cb(sm->ft_pending_cb_ctx, sm->addr, sm->wpa_auth->addr,
1420 sm->ft_pending_auth_transaction + 1, status,
1421 resp_ies, resp_ies_len);
1426 static int ft_pull_resp_cb(struct wpa_state_machine *sm, void *ctx)
1428 struct ft_r0kh_r1kh_resp_frame *frame = ctx;
1430 if (os_memcmp(frame->s1kh_id, sm->addr, ETH_ALEN) != 0)
1432 if (os_memcmp(frame->nonce, sm->ft_pending_pull_nonce,
1433 FT_R0KH_R1KH_PULL_NONCE_LEN) != 0)
1435 if (sm->ft_pending_cb == NULL || sm->ft_pending_req_ies == NULL)
1438 wpa_printf(MSG_DEBUG, "FT: Response to a pending pull request for "
1439 MACSTR " - process from timeout", MAC2STR(sm->addr));
1440 eloop_register_timeout(0, 0, ft_pull_resp_cb_finish, sm, NULL);
1445 static int wpa_ft_rrb_rx_resp(struct wpa_authenticator *wpa_auth,
1447 const u8 *data, size_t data_len)
1449 struct ft_r0kh_r1kh_resp_frame f;
1452 struct ft_remote_r0kh *r0kh;
1455 wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull response");
1457 if (data_len < sizeof(f))
1460 r0kh = wpa_auth->conf.r0kh_list;
1462 if (os_memcmp(r0kh->addr, src_addr, ETH_ALEN) == 0)
1467 wpa_printf(MSG_DEBUG, "FT: No matching R0KH address found for "
1468 "PMK-R0 pull response source address " MACSTR,
1473 crypt = data + offsetof(struct ft_r0kh_r1kh_resp_frame, nonce);
1474 os_memset(&f, 0, sizeof(f));
1475 plain = ((u8 *) &f) + offsetof(struct ft_r0kh_r1kh_resp_frame, nonce);
1476 /* aes_unwrap() does not support inplace decryption, so use a temporary
1477 * buffer for the data. */
1478 if (aes_unwrap(r0kh->key, sizeof(r0kh->key),
1479 (FT_R0KH_R1KH_RESP_DATA_LEN + 7) / 8,
1480 crypt, plain) < 0) {
1481 wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 pull "
1482 "response from " MACSTR, MAC2STR(src_addr));
1486 if (os_memcmp_const(f.r1kh_id, wpa_auth->conf.r1_key_holder,
1487 FT_R1KH_ID_LEN) != 0) {
1488 wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull response did not use a "
1489 "matching R1KH-ID");
1493 pairwise = le_to_host16(f.pairwise);
1494 wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - nonce",
1495 f.nonce, sizeof(f.nonce));
1496 wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull - R1KH-ID=" MACSTR " S1KH-ID="
1497 MACSTR " pairwise=0x%x",
1498 MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id), pairwise);
1499 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1 pull - PMK-R1",
1501 wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - PMKR1Name",
1502 f.pmk_r1_name, WPA_PMK_NAME_LEN);
1504 res = wpa_ft_store_pmk_r1(wpa_auth, f.s1kh_id, f.pmk_r1, f.pmk_r1_name,
1506 wpa_printf(MSG_DEBUG, "FT: Look for pending pull request");
1507 wpa_auth_for_each_sta(wpa_auth, ft_pull_resp_cb, &f);
1508 os_memset(f.pmk_r1, 0, PMK_LEN);
1510 return res ? 0 : -1;
1514 static int wpa_ft_rrb_rx_push(struct wpa_authenticator *wpa_auth,
1516 const u8 *data, size_t data_len)
1518 struct ft_r0kh_r1kh_push_frame f;
1521 struct ft_remote_r0kh *r0kh;
1526 wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 push");
1528 if (data_len < sizeof(f))
1531 r0kh = wpa_auth->conf.r0kh_list;
1533 if (os_memcmp(r0kh->addr, src_addr, ETH_ALEN) == 0)
1538 wpa_printf(MSG_DEBUG, "FT: No matching R0KH address found for "
1539 "PMK-R0 push source address " MACSTR,
1544 crypt = data + offsetof(struct ft_r0kh_r1kh_push_frame, timestamp);
1545 os_memset(&f, 0, sizeof(f));
1546 plain = ((u8 *) &f) + offsetof(struct ft_r0kh_r1kh_push_frame,
1548 /* aes_unwrap() does not support inplace decryption, so use a temporary
1549 * buffer for the data. */
1550 if (aes_unwrap(r0kh->key, sizeof(r0kh->key),
1551 (FT_R0KH_R1KH_PUSH_DATA_LEN + 7) / 8,
1552 crypt, plain) < 0) {
1553 wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 push from "
1554 MACSTR, MAC2STR(src_addr));
1559 tsend = WPA_GET_LE32(f.timestamp);
1560 if ((now.sec > tsend && now.sec - tsend > 60) ||
1561 (now.sec < tsend && tsend - now.sec > 60)) {
1562 wpa_printf(MSG_DEBUG, "FT: PMK-R1 push did not have a valid "
1563 "timestamp: sender time %d own time %d\n",
1564 (int) tsend, (int) now.sec);
1568 if (os_memcmp_const(f.r1kh_id, wpa_auth->conf.r1_key_holder,
1569 FT_R1KH_ID_LEN) != 0) {
1570 wpa_printf(MSG_DEBUG, "FT: PMK-R1 push did not use a matching "
1571 "R1KH-ID (received " MACSTR " own " MACSTR ")",
1573 MAC2STR(wpa_auth->conf.r1_key_holder));
1577 pairwise = le_to_host16(f.pairwise);
1578 wpa_printf(MSG_DEBUG, "FT: PMK-R1 push - R1KH-ID=" MACSTR " S1KH-ID="
1579 MACSTR " pairwise=0x%x",
1580 MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id), pairwise);
1581 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1 push - PMK-R1",
1583 wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 push - PMKR1Name",
1584 f.pmk_r1_name, WPA_PMK_NAME_LEN);
1586 wpa_ft_store_pmk_r1(wpa_auth, f.s1kh_id, f.pmk_r1, f.pmk_r1_name,
1588 os_memset(f.pmk_r1, 0, PMK_LEN);
1594 int wpa_ft_rrb_rx(struct wpa_authenticator *wpa_auth, const u8 *src_addr,
1595 const u8 *data, size_t data_len)
1597 struct ft_rrb_frame *frame;
1599 const u8 *pos, *end, *start;
1601 const u8 *sta_addr, *target_ap_addr;
1603 wpa_printf(MSG_DEBUG, "FT: RRB received frame from remote AP " MACSTR,
1606 if (data_len < sizeof(*frame)) {
1607 wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (data_len=%lu)",
1608 (unsigned long) data_len);
1613 frame = (struct ft_rrb_frame *) pos;
1614 pos += sizeof(*frame);
1616 alen = le_to_host16(frame->action_length);
1617 wpa_printf(MSG_DEBUG, "FT: RRB frame - frame_type=%d packet_type=%d "
1618 "action_length=%d ap_address=" MACSTR,
1619 frame->frame_type, frame->packet_type, alen,
1620 MAC2STR(frame->ap_address));
1622 if (frame->frame_type != RSN_REMOTE_FRAME_TYPE_FT_RRB) {
1623 /* Discard frame per IEEE Std 802.11r-2008, 11A.10.3 */
1624 wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with "
1625 "unrecognized type %d", frame->frame_type);
1629 if (alen > data_len - sizeof(*frame)) {
1630 wpa_printf(MSG_DEBUG, "FT: RRB frame too short for action "
1635 if (frame->packet_type == FT_PACKET_R0KH_R1KH_PULL)
1636 return wpa_ft_rrb_rx_pull(wpa_auth, src_addr, data, data_len);
1637 if (frame->packet_type == FT_PACKET_R0KH_R1KH_RESP)
1638 return wpa_ft_rrb_rx_resp(wpa_auth, src_addr, data, data_len);
1639 if (frame->packet_type == FT_PACKET_R0KH_R1KH_PUSH)
1640 return wpa_ft_rrb_rx_push(wpa_auth, src_addr, data, data_len);
1642 wpa_hexdump(MSG_MSGDUMP, "FT: RRB - FT Action frame", pos, alen);
1644 if (alen < 1 + 1 + 2 * ETH_ALEN) {
1645 wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (not enough "
1646 "room for Action Frame body); alen=%lu",
1647 (unsigned long) alen);
1653 if (*pos != WLAN_ACTION_FT) {
1654 wpa_printf(MSG_DEBUG, "FT: Unexpected Action frame category "
1663 target_ap_addr = pos;
1665 wpa_printf(MSG_DEBUG, "FT: RRB Action Frame: action=%d sta_addr="
1666 MACSTR " target_ap_addr=" MACSTR,
1667 action, MAC2STR(sta_addr), MAC2STR(target_ap_addr));
1669 if (frame->packet_type == FT_PACKET_REQUEST) {
1670 wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Request");
1673 wpa_printf(MSG_DEBUG, "FT: Unexpected Action %d in "
1674 "RRB Request", action);
1678 if (os_memcmp(target_ap_addr, wpa_auth->addr, ETH_ALEN) != 0) {
1679 wpa_printf(MSG_DEBUG, "FT: Target AP address in the "
1680 "RRB Request does not match with own "
1685 if (wpa_ft_rrb_rx_request(wpa_auth, frame->ap_address,
1686 sta_addr, pos, end - pos) < 0)
1688 } else if (frame->packet_type == FT_PACKET_RESPONSE) {
1691 if (end - pos < 2) {
1692 wpa_printf(MSG_DEBUG, "FT: Not enough room for status "
1693 "code in RRB Response");
1696 status_code = WPA_GET_LE16(pos);
1699 wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Response "
1700 "(status_code=%d)", status_code);
1702 if (wpa_ft_action_send(wpa_auth, sta_addr, start, alen) < 0)
1705 wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with unknown "
1706 "packet_type %d", frame->packet_type);
1711 wpa_hexdump(MSG_DEBUG, "FT: Ignore extra data in end",
1719 static void wpa_ft_generate_pmk_r1(struct wpa_authenticator *wpa_auth,
1720 struct wpa_ft_pmk_r0_sa *pmk_r0,
1721 struct ft_remote_r1kh *r1kh,
1722 const u8 *s1kh_id, int pairwise)
1724 struct ft_r0kh_r1kh_push_frame frame, f;
1729 os_memset(&frame, 0, sizeof(frame));
1730 frame.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1731 frame.packet_type = FT_PACKET_R0KH_R1KH_PUSH;
1732 frame.data_length = host_to_le16(FT_R0KH_R1KH_PUSH_DATA_LEN);
1733 os_memcpy(frame.ap_address, wpa_auth->addr, ETH_ALEN);
1735 /* aes_wrap() does not support inplace encryption, so use a temporary
1736 * buffer for the data. */
1737 os_memcpy(f.r1kh_id, r1kh->id, FT_R1KH_ID_LEN);
1738 os_memcpy(f.s1kh_id, s1kh_id, ETH_ALEN);
1739 os_memcpy(f.pmk_r0_name, pmk_r0->pmk_r0_name, WPA_PMK_NAME_LEN);
1740 wpa_derive_pmk_r1(pmk_r0->pmk_r0, pmk_r0->pmk_r0_name, r1kh->id,
1741 s1kh_id, f.pmk_r1, f.pmk_r1_name);
1742 wpa_printf(MSG_DEBUG, "FT: R1KH-ID " MACSTR, MAC2STR(r1kh->id));
1743 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", f.pmk_r1, PMK_LEN);
1744 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", f.pmk_r1_name,
1747 WPA_PUT_LE32(f.timestamp, now.sec);
1748 f.pairwise = host_to_le16(pairwise);
1749 os_memset(f.pad, 0, sizeof(f.pad));
1750 plain = ((const u8 *) &f) + offsetof(struct ft_r0kh_r1kh_push_frame,
1752 crypt = ((u8 *) &frame) + offsetof(struct ft_r0kh_r1kh_push_frame,
1754 if (aes_wrap(r1kh->key, sizeof(r1kh->key),
1755 (FT_R0KH_R1KH_PUSH_DATA_LEN + 7) / 8,
1759 wpa_ft_rrb_send(wpa_auth, r1kh->addr, (u8 *) &frame, sizeof(frame));
1763 void wpa_ft_push_pmk_r1(struct wpa_authenticator *wpa_auth, const u8 *addr)
1765 struct wpa_ft_pmk_r0_sa *r0;
1766 struct ft_remote_r1kh *r1kh;
1768 if (!wpa_auth->conf.pmk_r1_push)
1771 r0 = wpa_auth->ft_pmk_cache->pmk_r0;
1773 if (os_memcmp(r0->spa, addr, ETH_ALEN) == 0)
1778 if (r0 == NULL || r0->pmk_r1_pushed)
1780 r0->pmk_r1_pushed = 1;
1782 wpa_printf(MSG_DEBUG, "FT: Deriving and pushing PMK-R1 keys to R1KHs "
1783 "for STA " MACSTR, MAC2STR(addr));
1785 r1kh = wpa_auth->conf.r1kh_list;
1787 wpa_ft_generate_pmk_r1(wpa_auth, r0, r1kh, addr, r0->pairwise);
1792 #endif /* CONFIG_IEEE80211R */