2 * hostapd - IEEE 802.11r - Fast BSS Transition
3 * Copyright (c) 2004-2009, Jouni Malinen <j@w1.fi>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 * Alternatively, this software may be distributed under the terms of BSD
12 * See README and COPYING for more details.
15 #include "utils/includes.h"
17 #include "utils/common.h"
18 #include "common/ieee802_11_defs.h"
19 #include "common/ieee802_11_common.h"
20 #include "crypto/aes_wrap.h"
21 #include "ap_config.h"
22 #include "ieee802_11.h"
25 #include "wpa_auth_i.h"
26 #include "wpa_auth_ie.h"
29 #ifdef CONFIG_IEEE80211R
49 static int wpa_ft_parse_ies(const u8 *ies, size_t ies_len,
50 struct wpa_ft_ies *parse);
53 static int wpa_ft_rrb_send(struct wpa_authenticator *wpa_auth, const u8 *dst,
54 const u8 *data, size_t data_len)
56 if (wpa_auth->cb.send_ether == NULL)
58 return wpa_auth->cb.send_ether(wpa_auth->cb.ctx, dst, ETH_P_RRB,
63 static int wpa_ft_action_send(struct wpa_authenticator *wpa_auth,
64 const u8 *dst, const u8 *data, size_t data_len)
66 if (wpa_auth->cb.send_ft_action == NULL)
68 return wpa_auth->cb.send_ft_action(wpa_auth->cb.ctx, dst,
73 static struct wpa_state_machine *
74 wpa_ft_add_sta(struct wpa_authenticator *wpa_auth, const u8 *sta_addr)
76 if (wpa_auth->cb.add_sta == NULL)
78 return wpa_auth->cb.add_sta(wpa_auth->cb.ctx, sta_addr);
82 int wpa_write_mdie(struct wpa_auth_config *conf, u8 *buf, size_t len)
86 if (len < 2 + sizeof(struct rsn_mdie))
89 *pos++ = WLAN_EID_MOBILITY_DOMAIN;
90 *pos++ = MOBILITY_DOMAIN_ID_LEN + 1;
91 os_memcpy(pos, conf->mobility_domain, MOBILITY_DOMAIN_ID_LEN);
92 pos += MOBILITY_DOMAIN_ID_LEN;
93 capab = RSN_FT_CAPAB_FT_OVER_DS;
100 int wpa_write_ftie(struct wpa_auth_config *conf, const u8 *r0kh_id,
102 const u8 *anonce, const u8 *snonce,
103 u8 *buf, size_t len, const u8 *subelem,
106 u8 *pos = buf, *ielen;
107 struct rsn_ftie *hdr;
109 if (len < 2 + sizeof(*hdr) + 2 + FT_R1KH_ID_LEN + 2 + r0kh_id_len +
113 *pos++ = WLAN_EID_FAST_BSS_TRANSITION;
116 hdr = (struct rsn_ftie *) pos;
117 os_memset(hdr, 0, sizeof(*hdr));
119 WPA_PUT_LE16(hdr->mic_control, 0);
121 os_memcpy(hdr->anonce, anonce, WPA_NONCE_LEN);
123 os_memcpy(hdr->snonce, snonce, WPA_NONCE_LEN);
125 /* Optional Parameters */
126 *pos++ = FTIE_SUBELEM_R1KH_ID;
127 *pos++ = FT_R1KH_ID_LEN;
128 os_memcpy(pos, conf->r1_key_holder, FT_R1KH_ID_LEN);
129 pos += FT_R1KH_ID_LEN;
132 *pos++ = FTIE_SUBELEM_R0KH_ID;
133 *pos++ = r0kh_id_len;
134 os_memcpy(pos, r0kh_id, r0kh_id_len);
139 os_memcpy(pos, subelem, subelem_len);
143 *ielen = pos - buf - 2;
149 struct wpa_ft_pmk_r0_sa {
150 struct wpa_ft_pmk_r0_sa *next;
152 u8 pmk_r0_name[WPA_PMK_NAME_LEN];
154 int pairwise; /* Pairwise cipher suite, WPA_CIPHER_* */
155 /* TODO: expiration, identity, radius_class, EAP type, VLAN ID */
159 struct wpa_ft_pmk_r1_sa {
160 struct wpa_ft_pmk_r1_sa *next;
162 u8 pmk_r1_name[WPA_PMK_NAME_LEN];
164 int pairwise; /* Pairwise cipher suite, WPA_CIPHER_* */
165 /* TODO: expiration, identity, radius_class, EAP type, VLAN ID */
168 struct wpa_ft_pmk_cache {
169 struct wpa_ft_pmk_r0_sa *pmk_r0;
170 struct wpa_ft_pmk_r1_sa *pmk_r1;
173 struct wpa_ft_pmk_cache * wpa_ft_pmk_cache_init(void)
175 struct wpa_ft_pmk_cache *cache;
177 cache = os_zalloc(sizeof(*cache));
183 void wpa_ft_pmk_cache_deinit(struct wpa_ft_pmk_cache *cache)
185 struct wpa_ft_pmk_r0_sa *r0, *r0prev;
186 struct wpa_ft_pmk_r1_sa *r1, *r1prev;
192 os_memset(r0prev->pmk_r0, 0, PMK_LEN);
200 os_memset(r1prev->pmk_r1, 0, PMK_LEN);
208 static int wpa_ft_store_pmk_r0(struct wpa_authenticator *wpa_auth,
209 const u8 *spa, const u8 *pmk_r0,
210 const u8 *pmk_r0_name, int pairwise)
212 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
213 struct wpa_ft_pmk_r0_sa *r0;
215 /* TODO: add expiration and limit on number of entries in cache */
217 r0 = os_zalloc(sizeof(*r0));
221 os_memcpy(r0->pmk_r0, pmk_r0, PMK_LEN);
222 os_memcpy(r0->pmk_r0_name, pmk_r0_name, WPA_PMK_NAME_LEN);
223 os_memcpy(r0->spa, spa, ETH_ALEN);
224 r0->pairwise = pairwise;
226 r0->next = cache->pmk_r0;
233 static int wpa_ft_fetch_pmk_r0(struct wpa_authenticator *wpa_auth,
234 const u8 *spa, const u8 *pmk_r0_name,
235 u8 *pmk_r0, int *pairwise)
237 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
238 struct wpa_ft_pmk_r0_sa *r0;
242 if (os_memcmp(r0->spa, spa, ETH_ALEN) == 0 &&
243 os_memcmp(r0->pmk_r0_name, pmk_r0_name, WPA_PMK_NAME_LEN)
245 os_memcpy(pmk_r0, r0->pmk_r0, PMK_LEN);
247 *pairwise = r0->pairwise;
258 static int wpa_ft_store_pmk_r1(struct wpa_authenticator *wpa_auth,
259 const u8 *spa, const u8 *pmk_r1,
260 const u8 *pmk_r1_name, int pairwise)
262 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
263 struct wpa_ft_pmk_r1_sa *r1;
265 /* TODO: add expiration and limit on number of entries in cache */
267 r1 = os_zalloc(sizeof(*r1));
271 os_memcpy(r1->pmk_r1, pmk_r1, PMK_LEN);
272 os_memcpy(r1->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN);
273 os_memcpy(r1->spa, spa, ETH_ALEN);
274 r1->pairwise = pairwise;
276 r1->next = cache->pmk_r1;
283 static int wpa_ft_fetch_pmk_r1(struct wpa_authenticator *wpa_auth,
284 const u8 *spa, const u8 *pmk_r1_name,
285 u8 *pmk_r1, int *pairwise)
287 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
288 struct wpa_ft_pmk_r1_sa *r1;
292 if (os_memcmp(r1->spa, spa, ETH_ALEN) == 0 &&
293 os_memcmp(r1->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN)
295 os_memcpy(pmk_r1, r1->pmk_r1, PMK_LEN);
297 *pairwise = r1->pairwise;
308 static int wpa_ft_pull_pmk_r1(struct wpa_authenticator *wpa_auth,
309 const u8 *s1kh_id, const u8 *r0kh_id,
310 size_t r0kh_id_len, const u8 *pmk_r0_name)
312 struct ft_remote_r0kh *r0kh;
313 struct ft_r0kh_r1kh_pull_frame frame, f;
315 r0kh = wpa_auth->conf.r0kh_list;
317 if (r0kh->id_len == r0kh_id_len &&
318 os_memcmp(r0kh->id, r0kh_id, r0kh_id_len) == 0)
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, wpa_auth->addr, ETH_ALEN);
334 /* aes_wrap() does not support inplace encryption, so use a temporary
335 * buffer for the data. */
336 if (os_get_random(f.nonce, sizeof(f.nonce))) {
337 wpa_printf(MSG_DEBUG, "FT: Failed to get random data for "
341 os_memcpy(f.pmk_r0_name, pmk_r0_name, WPA_PMK_NAME_LEN);
342 os_memcpy(f.r1kh_id, wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN);
343 os_memcpy(f.s1kh_id, s1kh_id, ETH_ALEN);
345 if (aes_wrap(r0kh->key, (FT_R0KH_R1KH_PULL_DATA_LEN + 7) / 8,
346 f.nonce, frame.nonce) < 0)
349 wpa_ft_rrb_send(wpa_auth, r0kh->addr, (u8 *) &frame, sizeof(frame));
355 int wpa_auth_derive_ptk_ft(struct wpa_state_machine *sm, const u8 *pmk,
356 struct wpa_ptk *ptk, size_t ptk_len)
358 u8 pmk_r0[PMK_LEN], pmk_r0_name[WPA_PMK_NAME_LEN];
360 u8 ptk_name[WPA_PMK_NAME_LEN];
361 const u8 *mdid = sm->wpa_auth->conf.mobility_domain;
362 const u8 *r0kh = sm->wpa_auth->conf.r0_key_holder;
363 size_t r0kh_len = sm->wpa_auth->conf.r0_key_holder_len;
364 const u8 *r1kh = sm->wpa_auth->conf.r1_key_holder;
365 const u8 *ssid = sm->wpa_auth->conf.ssid;
366 size_t ssid_len = sm->wpa_auth->conf.ssid_len;
369 if (sm->xxkey_len == 0) {
370 wpa_printf(MSG_DEBUG, "FT: XXKey not available for key "
375 wpa_derive_pmk_r0(sm->xxkey, sm->xxkey_len, ssid, ssid_len, mdid,
376 r0kh, r0kh_len, sm->addr, pmk_r0, pmk_r0_name);
377 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R0", pmk_r0, PMK_LEN);
378 wpa_hexdump(MSG_DEBUG, "FT: PMKR0Name", pmk_r0_name, WPA_PMK_NAME_LEN);
379 wpa_ft_store_pmk_r0(sm->wpa_auth, sm->addr, pmk_r0, pmk_r0_name,
382 wpa_derive_pmk_r1(pmk_r0, pmk_r0_name, r1kh, sm->addr,
383 pmk_r1, sm->pmk_r1_name);
384 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", pmk_r1, PMK_LEN);
385 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", sm->pmk_r1_name,
387 wpa_ft_store_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1, sm->pmk_r1_name,
390 wpa_pmk_r1_to_ptk(pmk_r1, sm->SNonce, sm->ANonce, sm->addr,
391 sm->wpa_auth->addr, sm->pmk_r1_name,
392 (u8 *) ptk, ptk_len, ptk_name);
393 wpa_hexdump_key(MSG_DEBUG, "FT: PTK", (u8 *) ptk, ptk_len);
394 wpa_hexdump(MSG_DEBUG, "FT: PTKName", ptk_name, WPA_PMK_NAME_LEN);
400 static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
401 const u8 *addr, int idx, u8 *seq)
403 if (wpa_auth->cb.get_seqnum == NULL)
405 return wpa_auth->cb.get_seqnum(wpa_auth->cb.ctx, addr, idx, seq);
409 static u8 * wpa_ft_gtk_subelem(struct wpa_state_machine *sm, size_t *len)
412 struct wpa_group *gsm = sm->group;
413 size_t subelem_len, pad_len;
418 key_len = gsm->GTK_len;
419 if (key_len > sizeof(keybuf))
423 * Pad key for AES Key Wrap if it is not multiple of 8 bytes or is less
426 pad_len = key_len % 8;
428 pad_len = 8 - pad_len;
429 if (key_len + pad_len < 16)
432 os_memcpy(keybuf, gsm->GTK[gsm->GN - 1], key_len);
433 os_memset(keybuf + key_len, 0, pad_len);
434 keybuf[key_len] = 0xdd;
438 key = gsm->GTK[gsm->GN - 1];
441 * Sub-elem ID[1] | Length[1] | Key Info[2] | Key Length[1] | RSC[8] |
444 subelem_len = 13 + key_len + 8;
445 subelem = os_zalloc(subelem_len);
449 subelem[0] = FTIE_SUBELEM_GTK;
450 subelem[1] = 11 + key_len + 8;
451 /* Key ID in B0-B1 of Key Info */
452 WPA_PUT_LE16(&subelem[2], gsm->GN & 0x03);
453 subelem[4] = gsm->GTK_len;
454 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, subelem + 5);
455 if (aes_wrap(sm->PTK.kek, key_len / 8, key, subelem + 13)) {
465 #ifdef CONFIG_IEEE80211W
466 static u8 * wpa_ft_igtk_subelem(struct wpa_state_machine *sm, size_t *len)
469 struct wpa_group *gsm = sm->group;
472 /* Sub-elem ID[1] | Length[1] | KeyID[2] | IPN[6] | Key Length[1] |
474 subelem_len = 1 + 1 + 2 + 6 + 1 + WPA_IGTK_LEN + 8;
475 subelem = os_zalloc(subelem_len);
480 *pos++ = FTIE_SUBELEM_IGTK;
481 *pos++ = subelem_len - 2;
482 WPA_PUT_LE16(pos, gsm->GN_igtk);
484 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos);
486 *pos++ = WPA_IGTK_LEN;
487 if (aes_wrap(sm->PTK.kek, WPA_IGTK_LEN / 8,
488 gsm->IGTK[gsm->GN_igtk - 4], pos)) {
496 #endif /* CONFIG_IEEE80211W */
499 static u8 * wpa_ft_process_rdie(u8 *pos, u8 *end, u8 id, u8 descr_count,
500 const u8 *ies, size_t ies_len)
502 struct ieee802_11_elems parse;
503 struct rsn_rdie *rdie;
505 wpa_printf(MSG_DEBUG, "FT: Resource Request: id=%d descr_count=%d",
507 wpa_hexdump(MSG_MSGDUMP, "FT: Resource descriptor IE(s)",
510 if (end - pos < (int) sizeof(*rdie)) {
511 wpa_printf(MSG_ERROR, "FT: Not enough room for response RDIE");
515 *pos++ = WLAN_EID_RIC_DATA;
516 *pos++ = sizeof(*rdie);
517 rdie = (struct rsn_rdie *) pos;
519 rdie->descr_count = 0;
520 rdie->status_code = host_to_le16(WLAN_STATUS_SUCCESS);
521 pos += sizeof(*rdie);
523 if (ieee802_11_parse_elems((u8 *) ies, ies_len, &parse, 1) ==
525 wpa_printf(MSG_DEBUG, "FT: Failed to parse request IEs");
527 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
532 if (parse.wmm_tspec) {
533 struct wmm_tspec_element *tspec;
536 if (parse.wmm_tspec_len + 2 < (int) sizeof(*tspec)) {
537 wpa_printf(MSG_DEBUG, "FT: Too short WMM TSPEC IE "
538 "(%d)", (int) parse.wmm_tspec_len);
540 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
543 if (end - pos < (int) sizeof(*tspec)) {
544 wpa_printf(MSG_ERROR, "FT: Not enough room for "
547 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
550 tspec = (struct wmm_tspec_element *) pos;
551 os_memcpy(tspec, parse.wmm_tspec - 2, sizeof(*tspec));
552 res = wmm_process_tspec(tspec);
553 wpa_printf(MSG_DEBUG, "FT: ADDTS processing result: %d", res);
554 if (res == WMM_ADDTS_STATUS_INVALID_PARAMETERS)
556 host_to_le16(WLAN_STATUS_INVALID_PARAMETERS);
557 else if (res == WMM_ADDTS_STATUS_REFUSED)
559 host_to_le16(WLAN_STATUS_REQUEST_DECLINED);
561 /* TSPEC accepted; include updated TSPEC in response */
562 rdie->descr_count = 1;
563 pos += sizeof(*tspec);
567 #endif /* NEED_AP_MLME */
569 wpa_printf(MSG_DEBUG, "FT: No supported resource requested");
570 rdie->status_code = host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
575 static u8 * wpa_ft_process_ric(u8 *pos, u8 *end, const u8 *ric, size_t ric_len)
577 const u8 *rpos, *start;
578 const struct rsn_rdie *rdie;
580 wpa_hexdump(MSG_MSGDUMP, "FT: RIC Request", ric, ric_len);
583 while (rpos + sizeof(*rdie) < ric + ric_len) {
584 if (rpos[0] != WLAN_EID_RIC_DATA || rpos[1] < sizeof(*rdie) ||
585 rpos + 2 + rpos[1] > ric + ric_len)
587 rdie = (const struct rsn_rdie *) (rpos + 2);
591 while (rpos + 2 <= ric + ric_len &&
592 rpos + 2 + rpos[1] <= ric + ric_len) {
593 if (rpos[0] == WLAN_EID_RIC_DATA)
597 pos = wpa_ft_process_rdie(pos, end, rdie->id,
599 start, rpos - start);
606 u8 * wpa_sm_write_assoc_resp_ies(struct wpa_state_machine *sm, u8 *pos,
607 size_t max_len, int auth_alg,
608 const u8 *req_ies, size_t req_ies_len)
610 u8 *end, *mdie, *ftie, *rsnie = NULL, *r0kh_id, *subelem = NULL;
611 size_t mdie_len, ftie_len, rsnie_len = 0, r0kh_id_len, subelem_len = 0;
613 struct wpa_auth_config *conf;
614 struct rsn_ftie *_ftie;
615 struct wpa_ft_ies parse;
622 conf = &sm->wpa_auth->conf;
624 if (sm->wpa_key_mgmt != WPA_KEY_MGMT_FT_IEEE8021X &&
625 sm->wpa_key_mgmt != WPA_KEY_MGMT_FT_PSK)
630 if (auth_alg == WLAN_AUTH_FT) {
632 * RSN (only present if this is a Reassociation Response and
633 * part of a fast BSS transition)
635 res = wpa_write_rsn_ie(conf, pos, end - pos, sm->pmk_r1_name);
643 /* Mobility Domain Information */
644 res = wpa_write_mdie(conf, pos, end - pos);
651 /* Fast BSS Transition Information */
652 if (auth_alg == WLAN_AUTH_FT) {
653 subelem = wpa_ft_gtk_subelem(sm, &subelem_len);
654 r0kh_id = sm->r0kh_id;
655 r0kh_id_len = sm->r0kh_id_len;
658 #ifdef CONFIG_IEEE80211W
659 if (sm->mgmt_frame_prot) {
663 igtk = wpa_ft_igtk_subelem(sm, &igtk_len);
668 nbuf = os_realloc(subelem, subelem_len + igtk_len);
675 os_memcpy(subelem + subelem_len, igtk, igtk_len);
676 subelem_len += igtk_len;
679 #endif /* CONFIG_IEEE80211W */
681 r0kh_id = conf->r0_key_holder;
682 r0kh_id_len = conf->r0_key_holder_len;
686 res = wpa_write_ftie(conf, r0kh_id, r0kh_id_len, anonce, snonce, pos,
687 end - pos, subelem, subelem_len);
695 _ftie = (struct rsn_ftie *) (ftie + 2);
696 if (auth_alg == WLAN_AUTH_FT)
697 _ftie->mic_control[1] = 3; /* Information element count */
700 if (wpa_ft_parse_ies(req_ies, req_ies_len, &parse) == 0 && parse.ric) {
701 pos = wpa_ft_process_ric(pos, end, parse.ric, parse.ric_len);
702 if (auth_alg == WLAN_AUTH_FT)
703 _ftie->mic_control[1] +=
704 ieee802_11_ie_count(ric_start,
707 if (ric_start == pos)
710 if (auth_alg == WLAN_AUTH_FT &&
711 wpa_ft_mic(sm->PTK.kck, sm->addr, sm->wpa_auth->addr, 6,
712 mdie, mdie_len, ftie, ftie_len,
714 ric_start, ric_start ? pos - ric_start : 0,
716 wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC");
722 static int wpa_ft_parse_ftie(const u8 *ie, size_t ie_len,
723 struct wpa_ft_ies *parse)
728 parse->ftie_len = ie_len;
730 pos = ie + sizeof(struct rsn_ftie);
733 while (pos + 2 <= end && pos + 2 + pos[1] <= end) {
735 case FTIE_SUBELEM_R1KH_ID:
736 if (pos[1] != FT_R1KH_ID_LEN) {
737 wpa_printf(MSG_DEBUG, "FT: Invalid R1KH-ID "
738 "length in FTIE: %d", pos[1]);
741 parse->r1kh_id = pos + 2;
743 case FTIE_SUBELEM_GTK:
744 parse->gtk = pos + 2;
745 parse->gtk_len = pos[1];
747 case FTIE_SUBELEM_R0KH_ID:
748 if (pos[1] < 1 || pos[1] > FT_R0KH_ID_MAX_LEN) {
749 wpa_printf(MSG_DEBUG, "FT: Invalid R0KH-ID "
750 "length in FTIE: %d", pos[1]);
753 parse->r0kh_id = pos + 2;
754 parse->r0kh_id_len = pos[1];
765 static int wpa_ft_parse_ies(const u8 *ies, size_t ies_len,
766 struct wpa_ft_ies *parse)
769 struct wpa_ie_data data;
771 const struct rsn_ftie *ftie;
772 int prot_ie_count = 0;
774 os_memset(parse, 0, sizeof(*parse));
780 while (pos + 2 <= end && pos + 2 + pos[1] <= end) {
783 parse->rsn = pos + 2;
784 parse->rsn_len = pos[1];
785 ret = wpa_parse_wpa_ie_rsn(parse->rsn - 2,
789 wpa_printf(MSG_DEBUG, "FT: Failed to parse "
793 if (data.num_pmkid == 1 && data.pmkid)
794 parse->rsn_pmkid = data.pmkid;
796 case WLAN_EID_MOBILITY_DOMAIN:
797 parse->mdie = pos + 2;
798 parse->mdie_len = pos[1];
800 case WLAN_EID_FAST_BSS_TRANSITION:
801 if (pos[1] < sizeof(*ftie))
803 ftie = (const struct rsn_ftie *) (pos + 2);
804 prot_ie_count = ftie->mic_control[1];
805 if (wpa_ft_parse_ftie(pos + 2, pos[1], parse) < 0)
808 case WLAN_EID_RIC_DATA:
809 if (parse->ric == NULL)
816 if (prot_ie_count == 0)
817 return 0; /* no MIC */
820 * Check that the protected IE count matches with IEs included in the
829 if (prot_ie_count < 0) {
830 wpa_printf(MSG_DEBUG, "FT: Some required IEs not included in "
831 "the protected IE count");
835 if (prot_ie_count == 0 && parse->ric) {
836 wpa_printf(MSG_DEBUG, "FT: RIC IE(s) in the frame, but not "
837 "included in protected IE count");
841 /* Determine the end of the RIC IE(s) */
843 while (pos && pos + 2 <= end && pos + 2 + pos[1] <= end &&
848 parse->ric_len = pos - parse->ric;
850 wpa_printf(MSG_DEBUG, "FT: %d protected IEs missing from "
851 "frame", (int) prot_ie_count);
859 static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
861 enum wpa_alg alg, const u8 *addr, int idx,
862 u8 *key, size_t key_len)
864 if (wpa_auth->cb.set_key == NULL)
866 return wpa_auth->cb.set_key(wpa_auth->cb.ctx, vlan_id, alg, addr, idx,
871 void wpa_ft_install_ptk(struct wpa_state_machine *sm)
876 /* MLME-SETKEYS.request(PTK) */
877 if (sm->pairwise == WPA_CIPHER_TKIP) {
880 } else if (sm->pairwise == WPA_CIPHER_CCMP) {
884 wpa_printf(MSG_DEBUG, "FT: Unknown pairwise alg 0x%x - skip "
885 "PTK configuration", sm->pairwise);
889 /* FIX: add STA entry to kernel/driver here? The set_key will fail
890 * most likely without this.. At the moment, STA entry is added only
891 * after association has been completed. This function will be called
892 * again after association to get the PTK configured, but that could be
893 * optimized by adding the STA entry earlier.
895 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
899 /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
900 sm->pairwise_set = TRUE;
904 static u16 wpa_ft_process_auth_req(struct wpa_state_machine *sm,
905 const u8 *ies, size_t ies_len,
906 u8 **resp_ies, size_t *resp_ies_len)
908 struct rsn_mdie *mdie;
909 struct rsn_ftie *ftie;
910 u8 pmk_r1[PMK_LEN], pmk_r1_name[WPA_PMK_NAME_LEN];
911 u8 ptk_name[WPA_PMK_NAME_LEN];
912 struct wpa_auth_config *conf;
913 struct wpa_ft_ies parse;
914 size_t buflen, ptk_len;
922 sm->pmk_r1_name_valid = 0;
923 conf = &sm->wpa_auth->conf;
925 wpa_hexdump(MSG_DEBUG, "FT: Received authentication frame IEs",
928 if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) {
929 wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs");
930 return WLAN_STATUS_UNSPECIFIED_FAILURE;
933 mdie = (struct rsn_mdie *) parse.mdie;
934 if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
935 os_memcmp(mdie->mobility_domain,
936 sm->wpa_auth->conf.mobility_domain,
937 MOBILITY_DOMAIN_ID_LEN) != 0) {
938 wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
939 return WLAN_STATUS_INVALID_MDIE;
942 ftie = (struct rsn_ftie *) parse.ftie;
943 if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
944 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
945 return WLAN_STATUS_INVALID_FTIE;
948 os_memcpy(sm->SNonce, ftie->snonce, WPA_NONCE_LEN);
950 if (parse.r0kh_id == NULL) {
951 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE - no R0KH-ID");
952 return WLAN_STATUS_INVALID_FTIE;
955 wpa_hexdump(MSG_DEBUG, "FT: STA R0KH-ID",
956 parse.r0kh_id, parse.r0kh_id_len);
957 os_memcpy(sm->r0kh_id, parse.r0kh_id, parse.r0kh_id_len);
958 sm->r0kh_id_len = parse.r0kh_id_len;
960 if (parse.rsn_pmkid == NULL) {
961 wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE");
962 return WLAN_STATUS_INVALID_PMKID;
965 wpa_hexdump(MSG_DEBUG, "FT: Requested PMKR0Name",
966 parse.rsn_pmkid, WPA_PMK_NAME_LEN);
967 wpa_derive_pmk_r1_name(parse.rsn_pmkid,
968 sm->wpa_auth->conf.r1_key_holder, sm->addr,
970 wpa_hexdump(MSG_DEBUG, "FT: Derived requested PMKR1Name",
971 pmk_r1_name, WPA_PMK_NAME_LEN);
973 if (wpa_ft_fetch_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1_name, pmk_r1,
975 if (wpa_ft_pull_pmk_r1(sm->wpa_auth, sm->addr, sm->r0kh_id,
976 sm->r0kh_id_len, parse.rsn_pmkid) < 0) {
977 wpa_printf(MSG_DEBUG, "FT: Did not have matching "
978 "PMK-R1 and unknown R0KH-ID");
979 return WLAN_STATUS_INVALID_PMKID;
983 * TODO: Should return "status pending" (and the caller should
984 * not send out response now). The real response will be sent
985 * once the response from R0KH is received.
987 return WLAN_STATUS_INVALID_PMKID;
990 wpa_hexdump_key(MSG_DEBUG, "FT: Selected PMK-R1", pmk_r1, PMK_LEN);
991 sm->pmk_r1_name_valid = 1;
992 os_memcpy(sm->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN);
994 if (os_get_random(sm->ANonce, WPA_NONCE_LEN)) {
995 wpa_printf(MSG_DEBUG, "FT: Failed to get random data for "
997 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1000 wpa_hexdump(MSG_DEBUG, "FT: Received SNonce",
1001 sm->SNonce, WPA_NONCE_LEN);
1002 wpa_hexdump(MSG_DEBUG, "FT: Generated ANonce",
1003 sm->ANonce, WPA_NONCE_LEN);
1005 ptk_len = pairwise != WPA_CIPHER_CCMP ? 64 : 48;
1006 wpa_pmk_r1_to_ptk(pmk_r1, sm->SNonce, sm->ANonce, sm->addr,
1007 sm->wpa_auth->addr, pmk_r1_name,
1008 (u8 *) &sm->PTK, ptk_len, ptk_name);
1009 wpa_hexdump_key(MSG_DEBUG, "FT: PTK",
1010 (u8 *) &sm->PTK, ptk_len);
1011 wpa_hexdump(MSG_DEBUG, "FT: PTKName", ptk_name, WPA_PMK_NAME_LEN);
1013 sm->pairwise = pairwise;
1014 wpa_ft_install_ptk(sm);
1016 buflen = 2 + sizeof(struct rsn_mdie) + 2 + sizeof(struct rsn_ftie) +
1017 2 + FT_R1KH_ID_LEN + 200;
1018 *resp_ies = os_zalloc(buflen);
1019 if (*resp_ies == NULL) {
1020 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1024 end = *resp_ies + buflen;
1026 ret = wpa_write_rsn_ie(conf, pos, end - pos, parse.rsn_pmkid);
1030 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1034 ret = wpa_write_mdie(conf, pos, end - pos);
1038 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1042 ret = wpa_write_ftie(conf, parse.r0kh_id, parse.r0kh_id_len,
1043 sm->ANonce, sm->SNonce, pos, end - pos, NULL, 0);
1047 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1051 *resp_ies_len = pos - *resp_ies;
1053 return WLAN_STATUS_SUCCESS;
1057 void wpa_ft_process_auth(struct wpa_state_machine *sm, const u8 *bssid,
1058 u16 auth_transaction, const u8 *ies, size_t ies_len,
1059 void (*cb)(void *ctx, const u8 *dst, const u8 *bssid,
1060 u16 auth_transaction, u16 status,
1061 const u8 *ies, size_t ies_len),
1066 size_t resp_ies_len;
1069 wpa_printf(MSG_DEBUG, "FT: Received authentication frame, but "
1070 "WPA SM not available");
1074 wpa_printf(MSG_DEBUG, "FT: Received authentication frame: STA=" MACSTR
1075 " BSSID=" MACSTR " transaction=%d",
1076 MAC2STR(sm->addr), MAC2STR(bssid), auth_transaction);
1077 status = wpa_ft_process_auth_req(sm, ies, ies_len, &resp_ies,
1080 wpa_printf(MSG_DEBUG, "FT: FT authentication response: dst=" MACSTR
1081 " auth_transaction=%d status=%d",
1082 MAC2STR(sm->addr), auth_transaction + 1, status);
1083 wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len);
1084 cb(ctx, sm->addr, bssid, auth_transaction + 1, status,
1085 resp_ies, resp_ies_len);
1090 u16 wpa_ft_validate_reassoc(struct wpa_state_machine *sm, const u8 *ies,
1093 struct wpa_ft_ies parse;
1094 struct rsn_mdie *mdie;
1095 struct rsn_ftie *ftie;
1100 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1102 wpa_hexdump(MSG_DEBUG, "FT: Reassoc Req IEs", ies, ies_len);
1104 if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) {
1105 wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs");
1106 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1109 if (parse.rsn == NULL) {
1110 wpa_printf(MSG_DEBUG, "FT: No RSNIE in Reassoc Req");
1111 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1114 if (parse.rsn_pmkid == NULL) {
1115 wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE");
1116 return WLAN_STATUS_INVALID_PMKID;
1119 if (os_memcmp(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN) != 0)
1121 wpa_printf(MSG_DEBUG, "FT: PMKID in Reassoc Req did not match "
1122 "with the PMKR1Name derived from auth request");
1123 return WLAN_STATUS_INVALID_PMKID;
1126 mdie = (struct rsn_mdie *) parse.mdie;
1127 if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
1128 os_memcmp(mdie->mobility_domain,
1129 sm->wpa_auth->conf.mobility_domain,
1130 MOBILITY_DOMAIN_ID_LEN) != 0) {
1131 wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
1132 return WLAN_STATUS_INVALID_MDIE;
1135 ftie = (struct rsn_ftie *) parse.ftie;
1136 if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
1137 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
1138 return WLAN_STATUS_INVALID_FTIE;
1141 if (os_memcmp(ftie->snonce, sm->SNonce, WPA_NONCE_LEN) != 0) {
1142 wpa_printf(MSG_DEBUG, "FT: SNonce mismatch in FTIE");
1143 wpa_hexdump(MSG_DEBUG, "FT: Received SNonce",
1144 ftie->snonce, WPA_NONCE_LEN);
1145 wpa_hexdump(MSG_DEBUG, "FT: Expected SNonce",
1146 sm->SNonce, WPA_NONCE_LEN);
1150 if (os_memcmp(ftie->anonce, sm->ANonce, WPA_NONCE_LEN) != 0) {
1151 wpa_printf(MSG_DEBUG, "FT: ANonce mismatch in FTIE");
1152 wpa_hexdump(MSG_DEBUG, "FT: Received ANonce",
1153 ftie->anonce, WPA_NONCE_LEN);
1154 wpa_hexdump(MSG_DEBUG, "FT: Expected ANonce",
1155 sm->ANonce, WPA_NONCE_LEN);
1160 if (parse.r0kh_id == NULL) {
1161 wpa_printf(MSG_DEBUG, "FT: No R0KH-ID subelem in FTIE");
1165 if (parse.r0kh_id_len != sm->r0kh_id_len ||
1166 os_memcmp(parse.r0kh_id, sm->r0kh_id, parse.r0kh_id_len) != 0) {
1167 wpa_printf(MSG_DEBUG, "FT: R0KH-ID in FTIE did not match with "
1168 "the current R0KH-ID");
1169 wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID in FTIE",
1170 parse.r0kh_id, parse.r0kh_id_len);
1171 wpa_hexdump(MSG_DEBUG, "FT: The current R0KH-ID",
1172 sm->r0kh_id, sm->r0kh_id_len);
1176 if (parse.r1kh_id == NULL) {
1177 wpa_printf(MSG_DEBUG, "FT: No R1KH-ID subelem in FTIE");
1181 if (os_memcmp(parse.r1kh_id, sm->wpa_auth->conf.r1_key_holder,
1182 FT_R1KH_ID_LEN) != 0) {
1183 wpa_printf(MSG_DEBUG, "FT: Unknown R1KH-ID used in "
1185 wpa_hexdump(MSG_DEBUG, "FT: R1KH-ID in FTIE",
1186 parse.r1kh_id, FT_R1KH_ID_LEN);
1187 wpa_hexdump(MSG_DEBUG, "FT: Expected R1KH-ID",
1188 sm->wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN);
1192 if (parse.rsn_pmkid == NULL ||
1193 os_memcmp(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN)) {
1194 wpa_printf(MSG_DEBUG, "FT: No matching PMKR1Name (PMKID) in "
1195 "RSNIE (pmkid=%d)", !!parse.rsn_pmkid);
1202 if (ftie->mic_control[1] != count) {
1203 wpa_printf(MSG_DEBUG, "FT: Unexpected IE count in MIC "
1204 "Control: received %u expected %u",
1205 ftie->mic_control[1], count);
1209 if (wpa_ft_mic(sm->PTK.kck, sm->addr, sm->wpa_auth->addr, 5,
1210 parse.mdie - 2, parse.mdie_len + 2,
1211 parse.ftie - 2, parse.ftie_len + 2,
1212 parse.rsn - 2, parse.rsn_len + 2,
1213 parse.ric, parse.ric_len,
1215 wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC");
1216 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1219 if (os_memcmp(mic, ftie->mic, 16) != 0) {
1220 wpa_printf(MSG_DEBUG, "FT: Invalid MIC in FTIE");
1221 wpa_hexdump(MSG_MSGDUMP, "FT: Received MIC", ftie->mic, 16);
1222 wpa_hexdump(MSG_MSGDUMP, "FT: Calculated MIC", mic, 16);
1223 return WLAN_STATUS_INVALID_FTIE;
1226 return WLAN_STATUS_SUCCESS;
1230 int wpa_ft_action_rx(struct wpa_state_machine *sm, const u8 *data, size_t len)
1232 const u8 *sta_addr, *target_ap;
1236 struct ft_rrb_frame *frame;
1242 * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6]
1243 * FT Request action frame body[variable]
1247 wpa_printf(MSG_DEBUG, "FT: Too short FT Action frame "
1248 "(len=%lu)", (unsigned long) len);
1253 sta_addr = data + 2;
1254 target_ap = data + 8;
1258 wpa_printf(MSG_DEBUG, "FT: Received FT Action frame (STA=" MACSTR
1259 " Target AP=" MACSTR " Action=%d)",
1260 MAC2STR(sta_addr), MAC2STR(target_ap), action);
1262 if (os_memcmp(sta_addr, sm->addr, ETH_ALEN) != 0) {
1263 wpa_printf(MSG_DEBUG, "FT: Mismatch in FT Action STA address: "
1264 "STA=" MACSTR " STA-Address=" MACSTR,
1265 MAC2STR(sm->addr), MAC2STR(sta_addr));
1270 * Do some sanity checking on the target AP address (not own and not
1271 * broadcast. This could be extended to filter based on a list of known
1272 * APs in the MD (if such a list were configured).
1274 if ((target_ap[0] & 0x01) ||
1275 os_memcmp(target_ap, sm->wpa_auth->addr, ETH_ALEN) == 0) {
1276 wpa_printf(MSG_DEBUG, "FT: Invalid Target AP in FT Action "
1281 wpa_hexdump(MSG_MSGDUMP, "FT: Action frame body", ies, ies_len);
1283 /* RRB - Forward action frame to the target AP */
1284 frame = os_malloc(sizeof(*frame) + len);
1285 frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1286 frame->packet_type = FT_PACKET_REQUEST;
1287 frame->action_length = host_to_le16(len);
1288 os_memcpy(frame->ap_address, sm->wpa_auth->addr, ETH_ALEN);
1289 os_memcpy(frame + 1, data, len);
1291 wpa_ft_rrb_send(sm->wpa_auth, target_ap, (u8 *) frame,
1292 sizeof(*frame) + len);
1299 static int wpa_ft_rrb_rx_request(struct wpa_authenticator *wpa_auth,
1300 const u8 *current_ap, const u8 *sta_addr,
1301 const u8 *body, size_t len)
1303 struct wpa_state_machine *sm;
1306 size_t resp_ies_len, rlen;
1307 struct ft_rrb_frame *frame;
1309 sm = wpa_ft_add_sta(wpa_auth, sta_addr);
1311 wpa_printf(MSG_DEBUG, "FT: Failed to add new STA based on "
1316 wpa_hexdump(MSG_MSGDUMP, "FT: RRB Request Frame body", body, len);
1318 status = wpa_ft_process_auth_req(sm, body, len, &resp_ies,
1321 wpa_printf(MSG_DEBUG, "FT: RRB authentication response: STA=" MACSTR
1322 " CurrentAP=" MACSTR " status=%d",
1323 MAC2STR(sm->addr), MAC2STR(current_ap), status);
1324 wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len);
1326 /* RRB - Forward action frame response to the Current AP */
1329 * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6]
1330 * Status_Code[2] FT Request action frame body[variable]
1332 rlen = 2 + 2 * ETH_ALEN + 2 + resp_ies_len;
1334 frame = os_malloc(sizeof(*frame) + rlen);
1335 frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1336 frame->packet_type = FT_PACKET_RESPONSE;
1337 frame->action_length = host_to_le16(rlen);
1338 os_memcpy(frame->ap_address, wpa_auth->addr, ETH_ALEN);
1339 pos = (u8 *) (frame + 1);
1340 *pos++ = WLAN_ACTION_FT;
1341 *pos++ = 2; /* Action: Response */
1342 os_memcpy(pos, sta_addr, ETH_ALEN);
1344 os_memcpy(pos, wpa_auth->addr, ETH_ALEN);
1346 WPA_PUT_LE16(pos, status);
1349 os_memcpy(pos, resp_ies, resp_ies_len);
1353 wpa_ft_rrb_send(wpa_auth, current_ap, (u8 *) frame,
1354 sizeof(*frame) + rlen);
1361 static int wpa_ft_rrb_rx_pull(struct wpa_authenticator *wpa_auth,
1363 const u8 *data, size_t data_len)
1365 struct ft_r0kh_r1kh_pull_frame *frame, f;
1366 struct ft_remote_r1kh *r1kh;
1367 struct ft_r0kh_r1kh_resp_frame resp, r;
1371 wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull");
1373 if (data_len < sizeof(*frame))
1376 r1kh = wpa_auth->conf.r1kh_list;
1378 if (os_memcmp(r1kh->addr, src_addr, ETH_ALEN) == 0)
1383 wpa_printf(MSG_DEBUG, "FT: No matching R1KH address found for "
1384 "PMK-R1 pull source address " MACSTR,
1389 frame = (struct ft_r0kh_r1kh_pull_frame *) data;
1390 /* aes_unwrap() does not support inplace decryption, so use a temporary
1391 * buffer for the data. */
1392 if (aes_unwrap(r1kh->key, (FT_R0KH_R1KH_PULL_DATA_LEN + 7) / 8,
1393 frame->nonce, f.nonce) < 0) {
1394 wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 pull "
1395 "request from " MACSTR, MAC2STR(src_addr));
1399 wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - nonce",
1400 f.nonce, sizeof(f.nonce));
1401 wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - PMKR0Name",
1402 f.pmk_r0_name, WPA_PMK_NAME_LEN);
1403 wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull - R1KH-ID=" MACSTR "S1KH-ID="
1404 MACSTR, MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id));
1406 os_memset(&resp, 0, sizeof(resp));
1407 resp.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1408 resp.packet_type = FT_PACKET_R0KH_R1KH_RESP;
1409 resp.data_length = host_to_le16(FT_R0KH_R1KH_RESP_DATA_LEN);
1410 os_memcpy(resp.ap_address, wpa_auth->addr, ETH_ALEN);
1412 /* aes_wrap() does not support inplace encryption, so use a temporary
1413 * buffer for the data. */
1414 os_memcpy(r.nonce, f.nonce, sizeof(f.nonce));
1415 os_memcpy(r.r1kh_id, f.r1kh_id, FT_R1KH_ID_LEN);
1416 os_memcpy(r.s1kh_id, f.s1kh_id, ETH_ALEN);
1417 if (wpa_ft_fetch_pmk_r0(wpa_auth, f.s1kh_id, f.pmk_r0_name, pmk_r0,
1419 wpa_printf(MSG_DEBUG, "FT: No matching PMKR0Name found for "
1424 wpa_derive_pmk_r1(pmk_r0, f.pmk_r0_name, f.r1kh_id, f.s1kh_id,
1425 r.pmk_r1, r.pmk_r1_name);
1426 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", r.pmk_r1, PMK_LEN);
1427 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", r.pmk_r1_name,
1429 r.pairwise = pairwise;
1431 if (aes_wrap(r1kh->key, (FT_R0KH_R1KH_RESP_DATA_LEN + 7) / 8,
1432 r.nonce, resp.nonce) < 0) {
1433 os_memset(pmk_r0, 0, PMK_LEN);
1437 os_memset(pmk_r0, 0, PMK_LEN);
1439 wpa_ft_rrb_send(wpa_auth, src_addr, (u8 *) &resp, sizeof(resp));
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 *frame, f;
1450 struct ft_remote_r0kh *r0kh;
1453 wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull response");
1455 if (data_len < sizeof(*frame))
1458 r0kh = wpa_auth->conf.r0kh_list;
1460 if (os_memcmp(r0kh->addr, src_addr, ETH_ALEN) == 0)
1465 wpa_printf(MSG_DEBUG, "FT: No matching R0KH address found for "
1466 "PMK-R0 pull response source address " MACSTR,
1471 frame = (struct ft_r0kh_r1kh_resp_frame *) data;
1472 /* aes_unwrap() does not support inplace decryption, so use a temporary
1473 * buffer for the data. */
1474 if (aes_unwrap(r0kh->key, (FT_R0KH_R1KH_RESP_DATA_LEN + 7) / 8,
1475 frame->nonce, f.nonce) < 0) {
1476 wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 pull "
1477 "response from " MACSTR, MAC2STR(src_addr));
1481 if (os_memcmp(f.r1kh_id, wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN)
1483 wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull response did not use a "
1484 "matching R1KH-ID");
1488 /* TODO: verify that <nonce,s1kh_id> matches with a pending request
1489 * and call this requests callback function to finish request
1492 pairwise = le_to_host16(f.pairwise);
1493 wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - nonce",
1494 f.nonce, sizeof(f.nonce));
1495 wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull - R1KH-ID=" MACSTR "S1KH-ID="
1496 MACSTR " pairwise=0x%x",
1497 MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id), pairwise);
1498 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1 pull - PMK-R1",
1500 wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - PMKR1Name",
1501 f.pmk_r1_name, WPA_PMK_NAME_LEN);
1503 wpa_ft_store_pmk_r1(wpa_auth, f.s1kh_id, f.pmk_r1, f.pmk_r1_name,
1505 os_memset(f.pmk_r1, 0, PMK_LEN);
1511 static int wpa_ft_rrb_rx_push(struct wpa_authenticator *wpa_auth,
1513 const u8 *data, size_t data_len)
1515 struct ft_r0kh_r1kh_push_frame *frame, f;
1516 struct ft_remote_r0kh *r0kh;
1521 wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 push");
1523 if (data_len < sizeof(*frame))
1526 r0kh = wpa_auth->conf.r0kh_list;
1528 if (os_memcmp(r0kh->addr, src_addr, ETH_ALEN) == 0)
1533 wpa_printf(MSG_DEBUG, "FT: No matching R0KH address found for "
1534 "PMK-R0 push source address " MACSTR,
1539 frame = (struct ft_r0kh_r1kh_push_frame *) data;
1540 /* aes_unwrap() does not support inplace decryption, so use a temporary
1541 * buffer for the data. */
1542 if (aes_unwrap(r0kh->key, (FT_R0KH_R1KH_PUSH_DATA_LEN + 7) / 8,
1543 frame->timestamp, f.timestamp) < 0) {
1544 wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 push from "
1545 MACSTR, MAC2STR(src_addr));
1550 tsend = WPA_GET_LE32(f.timestamp);
1551 if ((now.sec > tsend && now.sec - tsend > 60) ||
1552 (now.sec < tsend && tsend - now.sec > 60)) {
1553 wpa_printf(MSG_DEBUG, "FT: PMK-R1 push did not have a valid "
1554 "timestamp: sender time %d own time %d\n",
1555 (int) tsend, (int) now.sec);
1559 if (os_memcmp(f.r1kh_id, wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN)
1561 wpa_printf(MSG_DEBUG, "FT: PMK-R1 push did not use a matching "
1562 "R1KH-ID (received " MACSTR " own " MACSTR ")",
1564 MAC2STR(wpa_auth->conf.r1_key_holder));
1568 pairwise = le_to_host16(f.pairwise);
1569 wpa_printf(MSG_DEBUG, "FT: PMK-R1 push - R1KH-ID=" MACSTR " S1KH-ID="
1570 MACSTR " pairwise=0x%x",
1571 MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id), pairwise);
1572 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1 push - PMK-R1",
1574 wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 push - PMKR1Name",
1575 f.pmk_r1_name, WPA_PMK_NAME_LEN);
1577 wpa_ft_store_pmk_r1(wpa_auth, f.s1kh_id, f.pmk_r1, f.pmk_r1_name,
1579 os_memset(f.pmk_r1, 0, PMK_LEN);
1585 int wpa_ft_rrb_rx(struct wpa_authenticator *wpa_auth, const u8 *src_addr,
1586 const u8 *data, size_t data_len)
1588 struct ft_rrb_frame *frame;
1590 const u8 *pos, *end, *start;
1592 const u8 *sta_addr, *target_ap_addr;
1594 wpa_printf(MSG_DEBUG, "FT: RRB received frame from remote AP " MACSTR,
1597 if (data_len < sizeof(*frame)) {
1598 wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (data_len=%lu)",
1599 (unsigned long) data_len);
1604 frame = (struct ft_rrb_frame *) pos;
1605 pos += sizeof(*frame);
1607 alen = le_to_host16(frame->action_length);
1608 wpa_printf(MSG_DEBUG, "FT: RRB frame - frame_type=%d packet_type=%d "
1609 "action_length=%d ap_address=" MACSTR,
1610 frame->frame_type, frame->packet_type, alen,
1611 MAC2STR(frame->ap_address));
1613 if (frame->frame_type != RSN_REMOTE_FRAME_TYPE_FT_RRB) {
1614 /* Discard frame per IEEE Std 802.11r-2008, 11A.10.3 */
1615 wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with "
1616 "unrecognized type %d", frame->frame_type);
1620 if (alen > data_len - sizeof(*frame)) {
1621 wpa_printf(MSG_DEBUG, "FT: RRB frame too short for action "
1626 if (frame->packet_type == FT_PACKET_R0KH_R1KH_PULL)
1627 return wpa_ft_rrb_rx_pull(wpa_auth, src_addr, data, data_len);
1628 if (frame->packet_type == FT_PACKET_R0KH_R1KH_RESP)
1629 return wpa_ft_rrb_rx_resp(wpa_auth, src_addr, data, data_len);
1630 if (frame->packet_type == FT_PACKET_R0KH_R1KH_PUSH)
1631 return wpa_ft_rrb_rx_push(wpa_auth, src_addr, data, data_len);
1633 wpa_hexdump(MSG_MSGDUMP, "FT: RRB - FT Action frame", pos, alen);
1635 if (alen < 1 + 1 + 2 * ETH_ALEN) {
1636 wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (not enough "
1637 "room for Action Frame body); alen=%lu",
1638 (unsigned long) alen);
1644 if (*pos != WLAN_ACTION_FT) {
1645 wpa_printf(MSG_DEBUG, "FT: Unexpected Action frame category "
1654 target_ap_addr = pos;
1656 wpa_printf(MSG_DEBUG, "FT: RRB Action Frame: action=%d sta_addr="
1657 MACSTR " target_ap_addr=" MACSTR,
1658 action, MAC2STR(sta_addr), MAC2STR(target_ap_addr));
1660 if (frame->packet_type == FT_PACKET_REQUEST) {
1661 wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Request");
1664 wpa_printf(MSG_DEBUG, "FT: Unexpected Action %d in "
1665 "RRB Request", action);
1669 if (os_memcmp(target_ap_addr, wpa_auth->addr, ETH_ALEN) != 0) {
1670 wpa_printf(MSG_DEBUG, "FT: Target AP address in the "
1671 "RRB Request does not match with own "
1676 if (wpa_ft_rrb_rx_request(wpa_auth, frame->ap_address,
1677 sta_addr, pos, end - pos) < 0)
1679 } else if (frame->packet_type == FT_PACKET_RESPONSE) {
1682 if (end - pos < 2) {
1683 wpa_printf(MSG_DEBUG, "FT: Not enough room for status "
1684 "code in RRB Response");
1687 status_code = WPA_GET_LE16(pos);
1690 wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Response "
1691 "(status_code=%d)", status_code);
1693 if (wpa_ft_action_send(wpa_auth, sta_addr, start, alen) < 0)
1696 wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with unknown "
1697 "packet_type %d", frame->packet_type);
1705 static void wpa_ft_generate_pmk_r1(struct wpa_authenticator *wpa_auth,
1706 struct wpa_ft_pmk_r0_sa *pmk_r0,
1707 struct ft_remote_r1kh *r1kh,
1708 const u8 *s1kh_id, int pairwise)
1710 struct ft_r0kh_r1kh_push_frame frame, f;
1713 os_memset(&frame, 0, sizeof(frame));
1714 frame.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1715 frame.packet_type = FT_PACKET_R0KH_R1KH_PUSH;
1716 frame.data_length = host_to_le16(FT_R0KH_R1KH_PUSH_DATA_LEN);
1717 os_memcpy(frame.ap_address, wpa_auth->addr, ETH_ALEN);
1719 /* aes_wrap() does not support inplace encryption, so use a temporary
1720 * buffer for the data. */
1721 os_memcpy(f.r1kh_id, r1kh->id, FT_R1KH_ID_LEN);
1722 os_memcpy(f.s1kh_id, s1kh_id, ETH_ALEN);
1723 os_memcpy(f.pmk_r0_name, pmk_r0->pmk_r0_name, WPA_PMK_NAME_LEN);
1724 wpa_derive_pmk_r1(pmk_r0->pmk_r0, pmk_r0->pmk_r0_name, r1kh->id,
1725 s1kh_id, f.pmk_r1, f.pmk_r1_name);
1726 wpa_printf(MSG_DEBUG, "FT: R1KH-ID " MACSTR, MAC2STR(r1kh->id));
1727 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", f.pmk_r1, PMK_LEN);
1728 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", f.pmk_r1_name,
1731 WPA_PUT_LE32(f.timestamp, now.sec);
1732 f.pairwise = pairwise;
1733 if (aes_wrap(r1kh->key, (FT_R0KH_R1KH_PUSH_DATA_LEN + 7) / 8,
1734 f.timestamp, frame.timestamp) < 0)
1737 wpa_ft_rrb_send(wpa_auth, r1kh->addr, (u8 *) &frame, sizeof(frame));
1741 void wpa_ft_push_pmk_r1(struct wpa_authenticator *wpa_auth, const u8 *addr)
1743 struct wpa_ft_pmk_r0_sa *r0;
1744 struct ft_remote_r1kh *r1kh;
1746 if (!wpa_auth->conf.pmk_r1_push)
1749 r0 = wpa_auth->ft_pmk_cache->pmk_r0;
1751 if (os_memcmp(r0->spa, addr, ETH_ALEN) == 0)
1756 if (r0 == NULL || r0->pmk_r1_pushed)
1758 r0->pmk_r1_pushed = 1;
1760 wpa_printf(MSG_DEBUG, "FT: Deriving and pushing PMK-R1 keys to R1KHs "
1761 "for STA " MACSTR, MAC2STR(addr));
1763 r1kh = wpa_auth->conf.r1kh_list;
1765 wpa_ft_generate_pmk_r1(wpa_auth, r0, r1kh, addr, r0->pairwise);
1770 #endif /* CONFIG_IEEE80211R */