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 static 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
;
1099 return WLAN_STATUS_UNSPECIFIED_FAILURE
;
1101 wpa_hexdump(MSG_DEBUG
, "FT: Reassoc Req IEs", ies
, ies_len
);
1103 if (wpa_ft_parse_ies(ies
, ies_len
, &parse
) < 0) {
1104 wpa_printf(MSG_DEBUG
, "FT: Failed to parse FT IEs");
1105 return WLAN_STATUS_UNSPECIFIED_FAILURE
;
1108 if (parse
.rsn
== NULL
) {
1109 wpa_printf(MSG_DEBUG
, "FT: No RSNIE in Reassoc Req");
1110 return WLAN_STATUS_UNSPECIFIED_FAILURE
;
1113 if (parse
.rsn_pmkid
== NULL
) {
1114 wpa_printf(MSG_DEBUG
, "FT: No PMKID in RSNIE");
1115 return WLAN_STATUS_INVALID_PMKID
;
1118 if (os_memcmp(parse
.rsn_pmkid
, sm
->pmk_r1_name
, WPA_PMK_NAME_LEN
) != 0)
1120 wpa_printf(MSG_DEBUG
, "FT: PMKID in Reassoc Req did not match "
1121 "with the PMKR1Name derived from auth request");
1122 return WLAN_STATUS_INVALID_PMKID
;
1125 mdie
= (struct rsn_mdie
*) parse
.mdie
;
1126 if (mdie
== NULL
|| parse
.mdie_len
< sizeof(*mdie
) ||
1127 os_memcmp(mdie
->mobility_domain
,
1128 sm
->wpa_auth
->conf
.mobility_domain
,
1129 MOBILITY_DOMAIN_ID_LEN
) != 0) {
1130 wpa_printf(MSG_DEBUG
, "FT: Invalid MDIE");
1131 return WLAN_STATUS_INVALID_MDIE
;
1134 ftie
= (struct rsn_ftie
*) parse
.ftie
;
1135 if (ftie
== NULL
|| parse
.ftie_len
< sizeof(*ftie
)) {
1136 wpa_printf(MSG_DEBUG
, "FT: Invalid FTIE");
1137 return WLAN_STATUS_INVALID_FTIE
;
1140 if (wpa_ft_mic(sm
->PTK
.kck
, sm
->addr
, sm
->wpa_auth
->addr
, 5,
1141 parse
.mdie
- 2, parse
.mdie_len
+ 2,
1142 parse
.ftie
- 2, parse
.ftie_len
+ 2,
1143 parse
.rsn
- 2, parse
.rsn_len
+ 2,
1144 parse
.ric
, parse
.ric_len
,
1146 wpa_printf(MSG_DEBUG
, "FT: Failed to calculate MIC");
1147 return WLAN_STATUS_UNSPECIFIED_FAILURE
;
1150 if (os_memcmp(mic
, ftie
->mic
, 16) != 0) {
1151 wpa_printf(MSG_DEBUG
, "FT: Invalid MIC in FTIE");
1152 wpa_hexdump(MSG_MSGDUMP
, "FT: Received MIC", ftie
->mic
, 16);
1153 wpa_hexdump(MSG_MSGDUMP
, "FT: Calculated MIC", mic
, 16);
1154 return WLAN_STATUS_INVALID_FTIE
;
1157 return WLAN_STATUS_SUCCESS
;
1161 int wpa_ft_action_rx(struct wpa_state_machine
*sm
, const u8
*data
, size_t len
)
1163 const u8
*sta_addr
, *target_ap
;
1167 struct ft_rrb_frame
*frame
;
1173 * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6]
1174 * FT Request action frame body[variable]
1178 wpa_printf(MSG_DEBUG
, "FT: Too short FT Action frame "
1179 "(len=%lu)", (unsigned long) len
);
1184 sta_addr
= data
+ 2;
1185 target_ap
= data
+ 8;
1189 wpa_printf(MSG_DEBUG
, "FT: Received FT Action frame (STA=" MACSTR
1190 " Target AP=" MACSTR
" Action=%d)",
1191 MAC2STR(sta_addr
), MAC2STR(target_ap
), action
);
1193 if (os_memcmp(sta_addr
, sm
->addr
, ETH_ALEN
) != 0) {
1194 wpa_printf(MSG_DEBUG
, "FT: Mismatch in FT Action STA address: "
1195 "STA=" MACSTR
" STA-Address=" MACSTR
,
1196 MAC2STR(sm
->addr
), MAC2STR(sta_addr
));
1201 * Do some sanity checking on the target AP address (not own and not
1202 * broadcast. This could be extended to filter based on a list of known
1203 * APs in the MD (if such a list were configured).
1205 if ((target_ap
[0] & 0x01) ||
1206 os_memcmp(target_ap
, sm
->wpa_auth
->addr
, ETH_ALEN
) == 0) {
1207 wpa_printf(MSG_DEBUG
, "FT: Invalid Target AP in FT Action "
1212 wpa_hexdump(MSG_MSGDUMP
, "FT: Action frame body", ies
, ies_len
);
1214 /* RRB - Forward action frame to the target AP */
1215 frame
= os_malloc(sizeof(*frame
) + len
);
1216 frame
->frame_type
= RSN_REMOTE_FRAME_TYPE_FT_RRB
;
1217 frame
->packet_type
= FT_PACKET_REQUEST
;
1218 frame
->action_length
= host_to_le16(len
);
1219 os_memcpy(frame
->ap_address
, sm
->wpa_auth
->addr
, ETH_ALEN
);
1220 os_memcpy(frame
+ 1, data
, len
);
1222 wpa_ft_rrb_send(sm
->wpa_auth
, target_ap
, (u8
*) frame
,
1223 sizeof(*frame
) + len
);
1230 static int wpa_ft_rrb_rx_request(struct wpa_authenticator
*wpa_auth
,
1231 const u8
*current_ap
, const u8
*sta_addr
,
1232 const u8
*body
, size_t len
)
1234 struct wpa_state_machine
*sm
;
1237 size_t resp_ies_len
, rlen
;
1238 struct ft_rrb_frame
*frame
;
1240 sm
= wpa_ft_add_sta(wpa_auth
, sta_addr
);
1242 wpa_printf(MSG_DEBUG
, "FT: Failed to add new STA based on "
1247 wpa_hexdump(MSG_MSGDUMP
, "FT: RRB Request Frame body", body
, len
);
1249 status
= wpa_ft_process_auth_req(sm
, body
, len
, &resp_ies
,
1252 wpa_printf(MSG_DEBUG
, "FT: RRB authentication response: STA=" MACSTR
1253 " CurrentAP=" MACSTR
" status=%d",
1254 MAC2STR(sm
->addr
), MAC2STR(current_ap
), status
);
1255 wpa_hexdump(MSG_DEBUG
, "FT: Response IEs", resp_ies
, resp_ies_len
);
1257 /* RRB - Forward action frame response to the Current AP */
1260 * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6]
1261 * Status_Code[2] FT Request action frame body[variable]
1263 rlen
= 2 + 2 * ETH_ALEN
+ 2 + resp_ies_len
;
1265 frame
= os_malloc(sizeof(*frame
) + rlen
);
1266 frame
->frame_type
= RSN_REMOTE_FRAME_TYPE_FT_RRB
;
1267 frame
->packet_type
= FT_PACKET_RESPONSE
;
1268 frame
->action_length
= host_to_le16(rlen
);
1269 os_memcpy(frame
->ap_address
, wpa_auth
->addr
, ETH_ALEN
);
1270 pos
= (u8
*) (frame
+ 1);
1271 *pos
++ = WLAN_ACTION_FT
;
1272 *pos
++ = 2; /* Action: Response */
1273 os_memcpy(pos
, sta_addr
, ETH_ALEN
);
1275 os_memcpy(pos
, wpa_auth
->addr
, ETH_ALEN
);
1277 WPA_PUT_LE16(pos
, status
);
1280 os_memcpy(pos
, resp_ies
, resp_ies_len
);
1284 wpa_ft_rrb_send(wpa_auth
, current_ap
, (u8
*) frame
,
1285 sizeof(*frame
) + rlen
);
1292 static int wpa_ft_rrb_rx_pull(struct wpa_authenticator
*wpa_auth
,
1294 const u8
*data
, size_t data_len
)
1296 struct ft_r0kh_r1kh_pull_frame
*frame
, f
;
1297 struct ft_remote_r1kh
*r1kh
;
1298 struct ft_r0kh_r1kh_resp_frame resp
, r
;
1302 wpa_printf(MSG_DEBUG
, "FT: Received PMK-R1 pull");
1304 if (data_len
< sizeof(*frame
))
1307 r1kh
= wpa_auth
->conf
.r1kh_list
;
1309 if (os_memcmp(r1kh
->addr
, src_addr
, ETH_ALEN
) == 0)
1314 wpa_printf(MSG_DEBUG
, "FT: No matching R1KH address found for "
1315 "PMK-R1 pull source address " MACSTR
,
1320 frame
= (struct ft_r0kh_r1kh_pull_frame
*) data
;
1321 /* aes_unwrap() does not support inplace decryption, so use a temporary
1322 * buffer for the data. */
1323 if (aes_unwrap(r1kh
->key
, (FT_R0KH_R1KH_PULL_DATA_LEN
+ 7) / 8,
1324 frame
->nonce
, f
.nonce
) < 0) {
1325 wpa_printf(MSG_DEBUG
, "FT: Failed to decrypt PMK-R1 pull "
1326 "request from " MACSTR
, MAC2STR(src_addr
));
1330 wpa_hexdump(MSG_DEBUG
, "FT: PMK-R1 pull - nonce",
1331 f
.nonce
, sizeof(f
.nonce
));
1332 wpa_hexdump(MSG_DEBUG
, "FT: PMK-R1 pull - PMKR0Name",
1333 f
.pmk_r0_name
, WPA_PMK_NAME_LEN
);
1334 wpa_printf(MSG_DEBUG
, "FT: PMK-R1 pull - R1KH-ID=" MACSTR
"S1KH-ID="
1335 MACSTR
, MAC2STR(f
.r1kh_id
), MAC2STR(f
.s1kh_id
));
1337 os_memset(&resp
, 0, sizeof(resp
));
1338 resp
.frame_type
= RSN_REMOTE_FRAME_TYPE_FT_RRB
;
1339 resp
.packet_type
= FT_PACKET_R0KH_R1KH_RESP
;
1340 resp
.data_length
= host_to_le16(FT_R0KH_R1KH_RESP_DATA_LEN
);
1341 os_memcpy(resp
.ap_address
, wpa_auth
->addr
, ETH_ALEN
);
1343 /* aes_wrap() does not support inplace encryption, so use a temporary
1344 * buffer for the data. */
1345 os_memcpy(r
.nonce
, f
.nonce
, sizeof(f
.nonce
));
1346 os_memcpy(r
.r1kh_id
, f
.r1kh_id
, FT_R1KH_ID_LEN
);
1347 os_memcpy(r
.s1kh_id
, f
.s1kh_id
, ETH_ALEN
);
1348 if (wpa_ft_fetch_pmk_r0(wpa_auth
, f
.s1kh_id
, f
.pmk_r0_name
, pmk_r0
,
1350 wpa_printf(MSG_DEBUG
, "FT: No matching PMKR0Name found for "
1355 wpa_derive_pmk_r1(pmk_r0
, f
.pmk_r0_name
, f
.r1kh_id
, f
.s1kh_id
,
1356 r
.pmk_r1
, r
.pmk_r1_name
);
1357 wpa_hexdump_key(MSG_DEBUG
, "FT: PMK-R1", r
.pmk_r1
, PMK_LEN
);
1358 wpa_hexdump(MSG_DEBUG
, "FT: PMKR1Name", r
.pmk_r1_name
,
1360 r
.pairwise
= pairwise
;
1362 if (aes_wrap(r1kh
->key
, (FT_R0KH_R1KH_RESP_DATA_LEN
+ 7) / 8,
1363 r
.nonce
, resp
.nonce
) < 0) {
1364 os_memset(pmk_r0
, 0, PMK_LEN
);
1368 os_memset(pmk_r0
, 0, PMK_LEN
);
1370 wpa_ft_rrb_send(wpa_auth
, src_addr
, (u8
*) &resp
, sizeof(resp
));
1376 static int wpa_ft_rrb_rx_resp(struct wpa_authenticator
*wpa_auth
,
1378 const u8
*data
, size_t data_len
)
1380 struct ft_r0kh_r1kh_resp_frame
*frame
, f
;
1381 struct ft_remote_r0kh
*r0kh
;
1384 wpa_printf(MSG_DEBUG
, "FT: Received PMK-R1 pull response");
1386 if (data_len
< sizeof(*frame
))
1389 r0kh
= wpa_auth
->conf
.r0kh_list
;
1391 if (os_memcmp(r0kh
->addr
, src_addr
, ETH_ALEN
) == 0)
1396 wpa_printf(MSG_DEBUG
, "FT: No matching R0KH address found for "
1397 "PMK-R0 pull response source address " MACSTR
,
1402 frame
= (struct ft_r0kh_r1kh_resp_frame
*) data
;
1403 /* aes_unwrap() does not support inplace decryption, so use a temporary
1404 * buffer for the data. */
1405 if (aes_unwrap(r0kh
->key
, (FT_R0KH_R1KH_RESP_DATA_LEN
+ 7) / 8,
1406 frame
->nonce
, f
.nonce
) < 0) {
1407 wpa_printf(MSG_DEBUG
, "FT: Failed to decrypt PMK-R1 pull "
1408 "response from " MACSTR
, MAC2STR(src_addr
));
1412 if (os_memcmp(f
.r1kh_id
, wpa_auth
->conf
.r1_key_holder
, FT_R1KH_ID_LEN
)
1414 wpa_printf(MSG_DEBUG
, "FT: PMK-R1 pull response did not use a "
1415 "matching R1KH-ID");
1419 /* TODO: verify that <nonce,s1kh_id> matches with a pending request
1420 * and call this requests callback function to finish request
1423 pairwise
= le_to_host16(f
.pairwise
);
1424 wpa_hexdump(MSG_DEBUG
, "FT: PMK-R1 pull - nonce",
1425 f
.nonce
, sizeof(f
.nonce
));
1426 wpa_printf(MSG_DEBUG
, "FT: PMK-R1 pull - R1KH-ID=" MACSTR
"S1KH-ID="
1427 MACSTR
" pairwise=0x%x",
1428 MAC2STR(f
.r1kh_id
), MAC2STR(f
.s1kh_id
), pairwise
);
1429 wpa_hexdump_key(MSG_DEBUG
, "FT: PMK-R1 pull - PMK-R1",
1431 wpa_hexdump(MSG_DEBUG
, "FT: PMK-R1 pull - PMKR1Name",
1432 f
.pmk_r1_name
, WPA_PMK_NAME_LEN
);
1434 wpa_ft_store_pmk_r1(wpa_auth
, f
.s1kh_id
, f
.pmk_r1
, f
.pmk_r1_name
,
1436 os_memset(f
.pmk_r1
, 0, PMK_LEN
);
1442 static int wpa_ft_rrb_rx_push(struct wpa_authenticator
*wpa_auth
,
1444 const u8
*data
, size_t data_len
)
1446 struct ft_r0kh_r1kh_push_frame
*frame
, f
;
1447 struct ft_remote_r0kh
*r0kh
;
1452 wpa_printf(MSG_DEBUG
, "FT: Received PMK-R1 push");
1454 if (data_len
< sizeof(*frame
))
1457 r0kh
= wpa_auth
->conf
.r0kh_list
;
1459 if (os_memcmp(r0kh
->addr
, src_addr
, ETH_ALEN
) == 0)
1464 wpa_printf(MSG_DEBUG
, "FT: No matching R0KH address found for "
1465 "PMK-R0 push source address " MACSTR
,
1470 frame
= (struct ft_r0kh_r1kh_push_frame
*) data
;
1471 /* aes_unwrap() does not support inplace decryption, so use a temporary
1472 * buffer for the data. */
1473 if (aes_unwrap(r0kh
->key
, (FT_R0KH_R1KH_PUSH_DATA_LEN
+ 7) / 8,
1474 frame
->timestamp
, f
.timestamp
) < 0) {
1475 wpa_printf(MSG_DEBUG
, "FT: Failed to decrypt PMK-R1 push from "
1476 MACSTR
, MAC2STR(src_addr
));
1481 tsend
= WPA_GET_LE32(f
.timestamp
);
1482 if ((now
.sec
> tsend
&& now
.sec
- tsend
> 60) ||
1483 (now
.sec
< tsend
&& tsend
- now
.sec
> 60)) {
1484 wpa_printf(MSG_DEBUG
, "FT: PMK-R1 push did not have a valid "
1485 "timestamp: sender time %d own time %d\n",
1486 (int) tsend
, (int) now
.sec
);
1490 if (os_memcmp(f
.r1kh_id
, wpa_auth
->conf
.r1_key_holder
, FT_R1KH_ID_LEN
)
1492 wpa_printf(MSG_DEBUG
, "FT: PMK-R1 push did not use a matching "
1493 "R1KH-ID (received " MACSTR
" own " MACSTR
")",
1495 MAC2STR(wpa_auth
->conf
.r1_key_holder
));
1499 pairwise
= le_to_host16(f
.pairwise
);
1500 wpa_printf(MSG_DEBUG
, "FT: PMK-R1 push - R1KH-ID=" MACSTR
" S1KH-ID="
1501 MACSTR
" pairwise=0x%x",
1502 MAC2STR(f
.r1kh_id
), MAC2STR(f
.s1kh_id
), pairwise
);
1503 wpa_hexdump_key(MSG_DEBUG
, "FT: PMK-R1 push - PMK-R1",
1505 wpa_hexdump(MSG_DEBUG
, "FT: PMK-R1 push - PMKR1Name",
1506 f
.pmk_r1_name
, WPA_PMK_NAME_LEN
);
1508 wpa_ft_store_pmk_r1(wpa_auth
, f
.s1kh_id
, f
.pmk_r1
, f
.pmk_r1_name
,
1510 os_memset(f
.pmk_r1
, 0, PMK_LEN
);
1516 int wpa_ft_rrb_rx(struct wpa_authenticator
*wpa_auth
, const u8
*src_addr
,
1517 const u8
*data
, size_t data_len
)
1519 struct ft_rrb_frame
*frame
;
1521 const u8
*pos
, *end
, *start
;
1523 const u8
*sta_addr
, *target_ap_addr
;
1525 wpa_printf(MSG_DEBUG
, "FT: RRB received frame from remote AP " MACSTR
,
1528 if (data_len
< sizeof(*frame
)) {
1529 wpa_printf(MSG_DEBUG
, "FT: Too short RRB frame (data_len=%lu)",
1530 (unsigned long) data_len
);
1535 frame
= (struct ft_rrb_frame
*) pos
;
1536 pos
+= sizeof(*frame
);
1538 alen
= le_to_host16(frame
->action_length
);
1539 wpa_printf(MSG_DEBUG
, "FT: RRB frame - frame_type=%d packet_type=%d "
1540 "action_length=%d ap_address=" MACSTR
,
1541 frame
->frame_type
, frame
->packet_type
, alen
,
1542 MAC2STR(frame
->ap_address
));
1544 if (frame
->frame_type
!= RSN_REMOTE_FRAME_TYPE_FT_RRB
) {
1545 /* Discard frame per IEEE Std 802.11r-2008, 11A.10.3 */
1546 wpa_printf(MSG_DEBUG
, "FT: RRB discarded frame with "
1547 "unrecognized type %d", frame
->frame_type
);
1551 if (alen
> data_len
- sizeof(*frame
)) {
1552 wpa_printf(MSG_DEBUG
, "FT: RRB frame too short for action "
1557 if (frame
->packet_type
== FT_PACKET_R0KH_R1KH_PULL
)
1558 return wpa_ft_rrb_rx_pull(wpa_auth
, src_addr
, data
, data_len
);
1559 if (frame
->packet_type
== FT_PACKET_R0KH_R1KH_RESP
)
1560 return wpa_ft_rrb_rx_resp(wpa_auth
, src_addr
, data
, data_len
);
1561 if (frame
->packet_type
== FT_PACKET_R0KH_R1KH_PUSH
)
1562 return wpa_ft_rrb_rx_push(wpa_auth
, src_addr
, data
, data_len
);
1564 wpa_hexdump(MSG_MSGDUMP
, "FT: RRB - FT Action frame", pos
, alen
);
1566 if (alen
< 1 + 1 + 2 * ETH_ALEN
) {
1567 wpa_printf(MSG_DEBUG
, "FT: Too short RRB frame (not enough "
1568 "room for Action Frame body); alen=%lu",
1569 (unsigned long) alen
);
1575 if (*pos
!= WLAN_ACTION_FT
) {
1576 wpa_printf(MSG_DEBUG
, "FT: Unexpected Action frame category "
1585 target_ap_addr
= pos
;
1587 wpa_printf(MSG_DEBUG
, "FT: RRB Action Frame: action=%d sta_addr="
1588 MACSTR
" target_ap_addr=" MACSTR
,
1589 action
, MAC2STR(sta_addr
), MAC2STR(target_ap_addr
));
1591 if (frame
->packet_type
== FT_PACKET_REQUEST
) {
1592 wpa_printf(MSG_DEBUG
, "FT: FT Packet Type - Request");
1595 wpa_printf(MSG_DEBUG
, "FT: Unexpected Action %d in "
1596 "RRB Request", action
);
1600 if (os_memcmp(target_ap_addr
, wpa_auth
->addr
, ETH_ALEN
) != 0) {
1601 wpa_printf(MSG_DEBUG
, "FT: Target AP address in the "
1602 "RRB Request does not match with own "
1607 if (wpa_ft_rrb_rx_request(wpa_auth
, frame
->ap_address
,
1608 sta_addr
, pos
, end
- pos
) < 0)
1610 } else if (frame
->packet_type
== FT_PACKET_RESPONSE
) {
1613 if (end
- pos
< 2) {
1614 wpa_printf(MSG_DEBUG
, "FT: Not enough room for status "
1615 "code in RRB Response");
1618 status_code
= WPA_GET_LE16(pos
);
1621 wpa_printf(MSG_DEBUG
, "FT: FT Packet Type - Response "
1622 "(status_code=%d)", status_code
);
1624 if (wpa_ft_action_send(wpa_auth
, sta_addr
, start
, alen
) < 0)
1627 wpa_printf(MSG_DEBUG
, "FT: RRB discarded frame with unknown "
1628 "packet_type %d", frame
->packet_type
);
1636 static void wpa_ft_generate_pmk_r1(struct wpa_authenticator
*wpa_auth
,
1637 struct wpa_ft_pmk_r0_sa
*pmk_r0
,
1638 struct ft_remote_r1kh
*r1kh
,
1639 const u8
*s1kh_id
, int pairwise
)
1641 struct ft_r0kh_r1kh_push_frame frame
, f
;
1644 os_memset(&frame
, 0, sizeof(frame
));
1645 frame
.frame_type
= RSN_REMOTE_FRAME_TYPE_FT_RRB
;
1646 frame
.packet_type
= FT_PACKET_R0KH_R1KH_PUSH
;
1647 frame
.data_length
= host_to_le16(FT_R0KH_R1KH_PUSH_DATA_LEN
);
1648 os_memcpy(frame
.ap_address
, wpa_auth
->addr
, ETH_ALEN
);
1650 /* aes_wrap() does not support inplace encryption, so use a temporary
1651 * buffer for the data. */
1652 os_memcpy(f
.r1kh_id
, r1kh
->id
, FT_R1KH_ID_LEN
);
1653 os_memcpy(f
.s1kh_id
, s1kh_id
, ETH_ALEN
);
1654 os_memcpy(f
.pmk_r0_name
, pmk_r0
->pmk_r0_name
, WPA_PMK_NAME_LEN
);
1655 wpa_derive_pmk_r1(pmk_r0
->pmk_r0
, pmk_r0
->pmk_r0_name
, r1kh
->id
,
1656 s1kh_id
, f
.pmk_r1
, f
.pmk_r1_name
);
1657 wpa_printf(MSG_DEBUG
, "FT: R1KH-ID " MACSTR
, MAC2STR(r1kh
->id
));
1658 wpa_hexdump_key(MSG_DEBUG
, "FT: PMK-R1", f
.pmk_r1
, PMK_LEN
);
1659 wpa_hexdump(MSG_DEBUG
, "FT: PMKR1Name", f
.pmk_r1_name
,
1662 WPA_PUT_LE32(f
.timestamp
, now
.sec
);
1663 f
.pairwise
= pairwise
;
1664 if (aes_wrap(r1kh
->key
, (FT_R0KH_R1KH_PUSH_DATA_LEN
+ 7) / 8,
1665 f
.timestamp
, frame
.timestamp
) < 0)
1668 wpa_ft_rrb_send(wpa_auth
, r1kh
->addr
, (u8
*) &frame
, sizeof(frame
));
1672 void wpa_ft_push_pmk_r1(struct wpa_authenticator
*wpa_auth
, const u8
*addr
)
1674 struct wpa_ft_pmk_r0_sa
*r0
;
1675 struct ft_remote_r1kh
*r1kh
;
1677 if (!wpa_auth
->conf
.pmk_r1_push
)
1680 r0
= wpa_auth
->ft_pmk_cache
->pmk_r0
;
1682 if (os_memcmp(r0
->spa
, addr
, ETH_ALEN
) == 0)
1687 if (r0
== NULL
|| r0
->pmk_r1_pushed
)
1689 r0
->pmk_r1_pushed
= 1;
1691 wpa_printf(MSG_DEBUG
, "FT: Deriving and pushing PMK-R1 keys to R1KHs "
1692 "for STA " MACSTR
, MAC2STR(addr
));
1694 r1kh
= wpa_auth
->conf
.r1kh_list
;
1696 wpa_ft_generate_pmk_r1(wpa_auth
, r0
, r1kh
, addr
, r0
->pairwise
);
1701 #endif /* CONFIG_IEEE80211R */