2 * hostapd - IEEE 802.11r - Fast BSS Transition
3 * Copyright (c) 2004-2009, 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 "common/ieee802_11_defs.h"
13 #include "common/ieee802_11_common.h"
14 #include "crypto/aes_wrap.h"
15 #include "crypto/random.h"
16 #include "ap_config.h"
17 #include "ieee802_11.h"
20 #include "wpa_auth_i.h"
23 #ifdef CONFIG_IEEE80211R
25 static int wpa_ft_rrb_send(struct wpa_authenticator
*wpa_auth
, const u8
*dst
,
26 const u8
*data
, size_t data_len
)
28 if (wpa_auth
->cb
.send_ether
== NULL
)
30 wpa_printf(MSG_DEBUG
, "FT: RRB send to " MACSTR
, MAC2STR(dst
));
31 return wpa_auth
->cb
.send_ether(wpa_auth
->cb
.ctx
, dst
, ETH_P_RRB
,
36 static int wpa_ft_action_send(struct wpa_authenticator
*wpa_auth
,
37 const u8
*dst
, const u8
*data
, size_t data_len
)
39 if (wpa_auth
->cb
.send_ft_action
== NULL
)
41 return wpa_auth
->cb
.send_ft_action(wpa_auth
->cb
.ctx
, dst
,
46 static struct wpa_state_machine
*
47 wpa_ft_add_sta(struct wpa_authenticator
*wpa_auth
, const u8
*sta_addr
)
49 if (wpa_auth
->cb
.add_sta
== NULL
)
51 return wpa_auth
->cb
.add_sta(wpa_auth
->cb
.ctx
, sta_addr
);
55 int wpa_write_mdie(struct wpa_auth_config
*conf
, u8
*buf
, size_t len
)
59 if (len
< 2 + sizeof(struct rsn_mdie
))
62 *pos
++ = WLAN_EID_MOBILITY_DOMAIN
;
63 *pos
++ = MOBILITY_DOMAIN_ID_LEN
+ 1;
64 os_memcpy(pos
, conf
->mobility_domain
, MOBILITY_DOMAIN_ID_LEN
);
65 pos
+= MOBILITY_DOMAIN_ID_LEN
;
68 capab
|= RSN_FT_CAPAB_FT_OVER_DS
;
75 int wpa_write_ftie(struct wpa_auth_config
*conf
, const u8
*r0kh_id
,
77 const u8
*anonce
, const u8
*snonce
,
78 u8
*buf
, size_t len
, const u8
*subelem
,
81 u8
*pos
= buf
, *ielen
;
84 if (len
< 2 + sizeof(*hdr
) + 2 + FT_R1KH_ID_LEN
+ 2 + r0kh_id_len
+
88 *pos
++ = WLAN_EID_FAST_BSS_TRANSITION
;
91 hdr
= (struct rsn_ftie
*) pos
;
92 os_memset(hdr
, 0, sizeof(*hdr
));
94 WPA_PUT_LE16(hdr
->mic_control
, 0);
96 os_memcpy(hdr
->anonce
, anonce
, WPA_NONCE_LEN
);
98 os_memcpy(hdr
->snonce
, snonce
, WPA_NONCE_LEN
);
100 /* Optional Parameters */
101 *pos
++ = FTIE_SUBELEM_R1KH_ID
;
102 *pos
++ = FT_R1KH_ID_LEN
;
103 os_memcpy(pos
, conf
->r1_key_holder
, FT_R1KH_ID_LEN
);
104 pos
+= FT_R1KH_ID_LEN
;
107 *pos
++ = FTIE_SUBELEM_R0KH_ID
;
108 *pos
++ = r0kh_id_len
;
109 os_memcpy(pos
, r0kh_id
, r0kh_id_len
);
114 os_memcpy(pos
, subelem
, subelem_len
);
118 *ielen
= pos
- buf
- 2;
124 struct wpa_ft_pmk_r0_sa
{
125 struct wpa_ft_pmk_r0_sa
*next
;
127 u8 pmk_r0_name
[WPA_PMK_NAME_LEN
];
129 int pairwise
; /* Pairwise cipher suite, WPA_CIPHER_* */
130 /* TODO: expiration, identity, radius_class, EAP type, VLAN ID */
134 struct wpa_ft_pmk_r1_sa
{
135 struct wpa_ft_pmk_r1_sa
*next
;
137 u8 pmk_r1_name
[WPA_PMK_NAME_LEN
];
139 int pairwise
; /* Pairwise cipher suite, WPA_CIPHER_* */
140 /* TODO: expiration, identity, radius_class, EAP type, VLAN ID */
143 struct wpa_ft_pmk_cache
{
144 struct wpa_ft_pmk_r0_sa
*pmk_r0
;
145 struct wpa_ft_pmk_r1_sa
*pmk_r1
;
148 struct wpa_ft_pmk_cache
* wpa_ft_pmk_cache_init(void)
150 struct wpa_ft_pmk_cache
*cache
;
152 cache
= os_zalloc(sizeof(*cache
));
158 void wpa_ft_pmk_cache_deinit(struct wpa_ft_pmk_cache
*cache
)
160 struct wpa_ft_pmk_r0_sa
*r0
, *r0prev
;
161 struct wpa_ft_pmk_r1_sa
*r1
, *r1prev
;
167 os_memset(r0prev
->pmk_r0
, 0, PMK_LEN
);
175 os_memset(r1prev
->pmk_r1
, 0, PMK_LEN
);
183 static int wpa_ft_store_pmk_r0(struct wpa_authenticator
*wpa_auth
,
184 const u8
*spa
, const u8
*pmk_r0
,
185 const u8
*pmk_r0_name
, int pairwise
)
187 struct wpa_ft_pmk_cache
*cache
= wpa_auth
->ft_pmk_cache
;
188 struct wpa_ft_pmk_r0_sa
*r0
;
190 /* TODO: add expiration and limit on number of entries in cache */
192 r0
= os_zalloc(sizeof(*r0
));
196 os_memcpy(r0
->pmk_r0
, pmk_r0
, PMK_LEN
);
197 os_memcpy(r0
->pmk_r0_name
, pmk_r0_name
, WPA_PMK_NAME_LEN
);
198 os_memcpy(r0
->spa
, spa
, ETH_ALEN
);
199 r0
->pairwise
= pairwise
;
201 r0
->next
= cache
->pmk_r0
;
208 static int wpa_ft_fetch_pmk_r0(struct wpa_authenticator
*wpa_auth
,
209 const u8
*spa
, const u8
*pmk_r0_name
,
210 u8
*pmk_r0
, int *pairwise
)
212 struct wpa_ft_pmk_cache
*cache
= wpa_auth
->ft_pmk_cache
;
213 struct wpa_ft_pmk_r0_sa
*r0
;
217 if (os_memcmp(r0
->spa
, spa
, ETH_ALEN
) == 0 &&
218 os_memcmp(r0
->pmk_r0_name
, pmk_r0_name
, WPA_PMK_NAME_LEN
)
220 os_memcpy(pmk_r0
, r0
->pmk_r0
, PMK_LEN
);
222 *pairwise
= r0
->pairwise
;
233 static int wpa_ft_store_pmk_r1(struct wpa_authenticator
*wpa_auth
,
234 const u8
*spa
, const u8
*pmk_r1
,
235 const u8
*pmk_r1_name
, int pairwise
)
237 struct wpa_ft_pmk_cache
*cache
= wpa_auth
->ft_pmk_cache
;
238 struct wpa_ft_pmk_r1_sa
*r1
;
240 /* TODO: add expiration and limit on number of entries in cache */
242 r1
= os_zalloc(sizeof(*r1
));
246 os_memcpy(r1
->pmk_r1
, pmk_r1
, PMK_LEN
);
247 os_memcpy(r1
->pmk_r1_name
, pmk_r1_name
, WPA_PMK_NAME_LEN
);
248 os_memcpy(r1
->spa
, spa
, ETH_ALEN
);
249 r1
->pairwise
= pairwise
;
251 r1
->next
= cache
->pmk_r1
;
258 static int wpa_ft_fetch_pmk_r1(struct wpa_authenticator
*wpa_auth
,
259 const u8
*spa
, const u8
*pmk_r1_name
,
260 u8
*pmk_r1
, int *pairwise
)
262 struct wpa_ft_pmk_cache
*cache
= wpa_auth
->ft_pmk_cache
;
263 struct wpa_ft_pmk_r1_sa
*r1
;
267 if (os_memcmp(r1
->spa
, spa
, ETH_ALEN
) == 0 &&
268 os_memcmp(r1
->pmk_r1_name
, pmk_r1_name
, WPA_PMK_NAME_LEN
)
270 os_memcpy(pmk_r1
, r1
->pmk_r1
, PMK_LEN
);
272 *pairwise
= r1
->pairwise
;
283 static int wpa_ft_pull_pmk_r1(struct wpa_authenticator
*wpa_auth
,
284 const u8
*s1kh_id
, const u8
*r0kh_id
,
285 size_t r0kh_id_len
, const u8
*pmk_r0_name
)
287 struct ft_remote_r0kh
*r0kh
;
288 struct ft_r0kh_r1kh_pull_frame frame
, f
;
290 r0kh
= wpa_auth
->conf
.r0kh_list
;
292 if (r0kh
->id_len
== r0kh_id_len
&&
293 os_memcmp(r0kh
->id
, r0kh_id
, r0kh_id_len
) == 0)
300 wpa_printf(MSG_DEBUG
, "FT: Send PMK-R1 pull request to remote R0KH "
301 "address " MACSTR
, MAC2STR(r0kh
->addr
));
303 os_memset(&frame
, 0, sizeof(frame
));
304 frame
.frame_type
= RSN_REMOTE_FRAME_TYPE_FT_RRB
;
305 frame
.packet_type
= FT_PACKET_R0KH_R1KH_PULL
;
306 frame
.data_length
= host_to_le16(FT_R0KH_R1KH_PULL_DATA_LEN
);
307 os_memcpy(frame
.ap_address
, wpa_auth
->addr
, ETH_ALEN
);
309 /* aes_wrap() does not support inplace encryption, so use a temporary
310 * buffer for the data. */
311 if (random_get_bytes(f
.nonce
, sizeof(f
.nonce
))) {
312 wpa_printf(MSG_DEBUG
, "FT: Failed to get random data for "
316 os_memcpy(f
.pmk_r0_name
, pmk_r0_name
, WPA_PMK_NAME_LEN
);
317 os_memcpy(f
.r1kh_id
, wpa_auth
->conf
.r1_key_holder
, FT_R1KH_ID_LEN
);
318 os_memcpy(f
.s1kh_id
, s1kh_id
, ETH_ALEN
);
320 if (aes_wrap(r0kh
->key
, (FT_R0KH_R1KH_PULL_DATA_LEN
+ 7) / 8,
321 f
.nonce
, frame
.nonce
) < 0)
324 wpa_ft_rrb_send(wpa_auth
, r0kh
->addr
, (u8
*) &frame
, sizeof(frame
));
330 int wpa_auth_derive_ptk_ft(struct wpa_state_machine
*sm
, const u8
*pmk
,
331 struct wpa_ptk
*ptk
, size_t ptk_len
)
333 u8 pmk_r0
[PMK_LEN
], pmk_r0_name
[WPA_PMK_NAME_LEN
];
335 u8 ptk_name
[WPA_PMK_NAME_LEN
];
336 const u8
*mdid
= sm
->wpa_auth
->conf
.mobility_domain
;
337 const u8
*r0kh
= sm
->wpa_auth
->conf
.r0_key_holder
;
338 size_t r0kh_len
= sm
->wpa_auth
->conf
.r0_key_holder_len
;
339 const u8
*r1kh
= sm
->wpa_auth
->conf
.r1_key_holder
;
340 const u8
*ssid
= sm
->wpa_auth
->conf
.ssid
;
341 size_t ssid_len
= sm
->wpa_auth
->conf
.ssid_len
;
344 if (sm
->xxkey_len
== 0) {
345 wpa_printf(MSG_DEBUG
, "FT: XXKey not available for key "
350 wpa_derive_pmk_r0(sm
->xxkey
, sm
->xxkey_len
, ssid
, ssid_len
, mdid
,
351 r0kh
, r0kh_len
, sm
->addr
, pmk_r0
, pmk_r0_name
);
352 wpa_hexdump_key(MSG_DEBUG
, "FT: PMK-R0", pmk_r0
, PMK_LEN
);
353 wpa_hexdump(MSG_DEBUG
, "FT: PMKR0Name", pmk_r0_name
, WPA_PMK_NAME_LEN
);
354 wpa_ft_store_pmk_r0(sm
->wpa_auth
, sm
->addr
, pmk_r0
, pmk_r0_name
,
357 wpa_derive_pmk_r1(pmk_r0
, pmk_r0_name
, r1kh
, sm
->addr
,
358 pmk_r1
, sm
->pmk_r1_name
);
359 wpa_hexdump_key(MSG_DEBUG
, "FT: PMK-R1", pmk_r1
, PMK_LEN
);
360 wpa_hexdump(MSG_DEBUG
, "FT: PMKR1Name", sm
->pmk_r1_name
,
362 wpa_ft_store_pmk_r1(sm
->wpa_auth
, sm
->addr
, pmk_r1
, sm
->pmk_r1_name
,
365 wpa_pmk_r1_to_ptk(pmk_r1
, sm
->SNonce
, sm
->ANonce
, sm
->addr
,
366 sm
->wpa_auth
->addr
, sm
->pmk_r1_name
,
367 (u8
*) ptk
, ptk_len
, ptk_name
);
368 wpa_hexdump_key(MSG_DEBUG
, "FT: PTK", (u8
*) ptk
, ptk_len
);
369 wpa_hexdump(MSG_DEBUG
, "FT: PTKName", ptk_name
, WPA_PMK_NAME_LEN
);
375 static inline int wpa_auth_get_seqnum(struct wpa_authenticator
*wpa_auth
,
376 const u8
*addr
, int idx
, u8
*seq
)
378 if (wpa_auth
->cb
.get_seqnum
== NULL
)
380 return wpa_auth
->cb
.get_seqnum(wpa_auth
->cb
.ctx
, addr
, idx
, seq
);
384 static u8
* wpa_ft_gtk_subelem(struct wpa_state_machine
*sm
, size_t *len
)
387 struct wpa_group
*gsm
= sm
->group
;
388 size_t subelem_len
, pad_len
;
393 key_len
= gsm
->GTK_len
;
394 if (key_len
> sizeof(keybuf
))
398 * Pad key for AES Key Wrap if it is not multiple of 8 bytes or is less
401 pad_len
= key_len
% 8;
403 pad_len
= 8 - pad_len
;
404 if (key_len
+ pad_len
< 16)
407 os_memcpy(keybuf
, gsm
->GTK
[gsm
->GN
- 1], key_len
);
408 os_memset(keybuf
+ key_len
, 0, pad_len
);
409 keybuf
[key_len
] = 0xdd;
413 key
= gsm
->GTK
[gsm
->GN
- 1];
416 * Sub-elem ID[1] | Length[1] | Key Info[2] | Key Length[1] | RSC[8] |
419 subelem_len
= 13 + key_len
+ 8;
420 subelem
= os_zalloc(subelem_len
);
424 subelem
[0] = FTIE_SUBELEM_GTK
;
425 subelem
[1] = 11 + key_len
+ 8;
426 /* Key ID in B0-B1 of Key Info */
427 WPA_PUT_LE16(&subelem
[2], gsm
->GN
& 0x03);
428 subelem
[4] = gsm
->GTK_len
;
429 wpa_auth_get_seqnum(sm
->wpa_auth
, NULL
, gsm
->GN
, subelem
+ 5);
430 if (aes_wrap(sm
->PTK
.kek
, key_len
/ 8, key
, subelem
+ 13)) {
440 #ifdef CONFIG_IEEE80211W
441 static u8
* wpa_ft_igtk_subelem(struct wpa_state_machine
*sm
, size_t *len
)
444 struct wpa_group
*gsm
= sm
->group
;
447 /* Sub-elem ID[1] | Length[1] | KeyID[2] | IPN[6] | Key Length[1] |
449 subelem_len
= 1 + 1 + 2 + 6 + 1 + WPA_IGTK_LEN
+ 8;
450 subelem
= os_zalloc(subelem_len
);
455 *pos
++ = FTIE_SUBELEM_IGTK
;
456 *pos
++ = subelem_len
- 2;
457 WPA_PUT_LE16(pos
, gsm
->GN_igtk
);
459 wpa_auth_get_seqnum(sm
->wpa_auth
, NULL
, gsm
->GN_igtk
, pos
);
461 *pos
++ = WPA_IGTK_LEN
;
462 if (aes_wrap(sm
->PTK
.kek
, WPA_IGTK_LEN
/ 8,
463 gsm
->IGTK
[gsm
->GN_igtk
- 4], pos
)) {
471 #endif /* CONFIG_IEEE80211W */
474 static u8
* wpa_ft_process_rdie(u8
*pos
, u8
*end
, u8 id
, u8 descr_count
,
475 const u8
*ies
, size_t ies_len
)
477 struct ieee802_11_elems parse
;
478 struct rsn_rdie
*rdie
;
480 wpa_printf(MSG_DEBUG
, "FT: Resource Request: id=%d descr_count=%d",
482 wpa_hexdump(MSG_MSGDUMP
, "FT: Resource descriptor IE(s)",
485 if (end
- pos
< (int) sizeof(*rdie
)) {
486 wpa_printf(MSG_ERROR
, "FT: Not enough room for response RDIE");
490 *pos
++ = WLAN_EID_RIC_DATA
;
491 *pos
++ = sizeof(*rdie
);
492 rdie
= (struct rsn_rdie
*) pos
;
494 rdie
->descr_count
= 0;
495 rdie
->status_code
= host_to_le16(WLAN_STATUS_SUCCESS
);
496 pos
+= sizeof(*rdie
);
498 if (ieee802_11_parse_elems((u8
*) ies
, ies_len
, &parse
, 1) ==
500 wpa_printf(MSG_DEBUG
, "FT: Failed to parse request IEs");
502 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE
);
507 if (parse
.wmm_tspec
) {
508 struct wmm_tspec_element
*tspec
;
511 if (parse
.wmm_tspec_len
+ 2 < (int) sizeof(*tspec
)) {
512 wpa_printf(MSG_DEBUG
, "FT: Too short WMM TSPEC IE "
513 "(%d)", (int) parse
.wmm_tspec_len
);
515 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE
);
518 if (end
- pos
< (int) sizeof(*tspec
)) {
519 wpa_printf(MSG_ERROR
, "FT: Not enough room for "
522 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE
);
525 tspec
= (struct wmm_tspec_element
*) pos
;
526 os_memcpy(tspec
, parse
.wmm_tspec
- 2, sizeof(*tspec
));
527 res
= wmm_process_tspec(tspec
);
528 wpa_printf(MSG_DEBUG
, "FT: ADDTS processing result: %d", res
);
529 if (res
== WMM_ADDTS_STATUS_INVALID_PARAMETERS
)
531 host_to_le16(WLAN_STATUS_INVALID_PARAMETERS
);
532 else if (res
== WMM_ADDTS_STATUS_REFUSED
)
534 host_to_le16(WLAN_STATUS_REQUEST_DECLINED
);
536 /* TSPEC accepted; include updated TSPEC in response */
537 rdie
->descr_count
= 1;
538 pos
+= sizeof(*tspec
);
542 #endif /* NEED_AP_MLME */
544 wpa_printf(MSG_DEBUG
, "FT: No supported resource requested");
545 rdie
->status_code
= host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE
);
550 static u8
* wpa_ft_process_ric(u8
*pos
, u8
*end
, const u8
*ric
, size_t ric_len
)
552 const u8
*rpos
, *start
;
553 const struct rsn_rdie
*rdie
;
555 wpa_hexdump(MSG_MSGDUMP
, "FT: RIC Request", ric
, ric_len
);
558 while (rpos
+ sizeof(*rdie
) < ric
+ ric_len
) {
559 if (rpos
[0] != WLAN_EID_RIC_DATA
|| rpos
[1] < sizeof(*rdie
) ||
560 rpos
+ 2 + rpos
[1] > ric
+ ric_len
)
562 rdie
= (const struct rsn_rdie
*) (rpos
+ 2);
566 while (rpos
+ 2 <= ric
+ ric_len
&&
567 rpos
+ 2 + rpos
[1] <= ric
+ ric_len
) {
568 if (rpos
[0] == WLAN_EID_RIC_DATA
)
572 pos
= wpa_ft_process_rdie(pos
, end
, rdie
->id
,
574 start
, rpos
- start
);
581 u8
* wpa_sm_write_assoc_resp_ies(struct wpa_state_machine
*sm
, u8
*pos
,
582 size_t max_len
, int auth_alg
,
583 const u8
*req_ies
, size_t req_ies_len
)
585 u8
*end
, *mdie
, *ftie
, *rsnie
= NULL
, *r0kh_id
, *subelem
= NULL
;
586 size_t mdie_len
, ftie_len
, rsnie_len
= 0, r0kh_id_len
, subelem_len
= 0;
588 struct wpa_auth_config
*conf
;
589 struct rsn_ftie
*_ftie
;
590 struct wpa_ft_ies parse
;
597 conf
= &sm
->wpa_auth
->conf
;
599 if (sm
->wpa_key_mgmt
!= WPA_KEY_MGMT_FT_IEEE8021X
&&
600 sm
->wpa_key_mgmt
!= WPA_KEY_MGMT_FT_PSK
)
605 if (auth_alg
== WLAN_AUTH_FT
) {
607 * RSN (only present if this is a Reassociation Response and
608 * part of a fast BSS transition)
610 res
= wpa_write_rsn_ie(conf
, pos
, end
- pos
, sm
->pmk_r1_name
);
618 /* Mobility Domain Information */
619 res
= wpa_write_mdie(conf
, pos
, end
- pos
);
626 /* Fast BSS Transition Information */
627 if (auth_alg
== WLAN_AUTH_FT
) {
628 subelem
= wpa_ft_gtk_subelem(sm
, &subelem_len
);
629 r0kh_id
= sm
->r0kh_id
;
630 r0kh_id_len
= sm
->r0kh_id_len
;
633 #ifdef CONFIG_IEEE80211W
634 if (sm
->mgmt_frame_prot
) {
638 igtk
= wpa_ft_igtk_subelem(sm
, &igtk_len
);
643 nbuf
= os_realloc(subelem
, subelem_len
+ igtk_len
);
650 os_memcpy(subelem
+ subelem_len
, igtk
, igtk_len
);
651 subelem_len
+= igtk_len
;
654 #endif /* CONFIG_IEEE80211W */
656 r0kh_id
= conf
->r0_key_holder
;
657 r0kh_id_len
= conf
->r0_key_holder_len
;
661 res
= wpa_write_ftie(conf
, r0kh_id
, r0kh_id_len
, anonce
, snonce
, pos
,
662 end
- pos
, subelem
, subelem_len
);
670 os_free(sm
->assoc_resp_ftie
);
671 sm
->assoc_resp_ftie
= os_malloc(ftie_len
);
672 if (sm
->assoc_resp_ftie
)
673 os_memcpy(sm
->assoc_resp_ftie
, ftie
, ftie_len
);
675 _ftie
= (struct rsn_ftie
*) (ftie
+ 2);
676 if (auth_alg
== WLAN_AUTH_FT
)
677 _ftie
->mic_control
[1] = 3; /* Information element count */
680 if (wpa_ft_parse_ies(req_ies
, req_ies_len
, &parse
) == 0 && parse
.ric
) {
681 pos
= wpa_ft_process_ric(pos
, end
, parse
.ric
, parse
.ric_len
);
682 if (auth_alg
== WLAN_AUTH_FT
)
683 _ftie
->mic_control
[1] +=
684 ieee802_11_ie_count(ric_start
,
687 if (ric_start
== pos
)
690 if (auth_alg
== WLAN_AUTH_FT
&&
691 wpa_ft_mic(sm
->PTK
.kck
, sm
->addr
, sm
->wpa_auth
->addr
, 6,
692 mdie
, mdie_len
, ftie
, ftie_len
,
694 ric_start
, ric_start
? pos
- ric_start
: 0,
696 wpa_printf(MSG_DEBUG
, "FT: Failed to calculate MIC");
702 static inline int wpa_auth_set_key(struct wpa_authenticator
*wpa_auth
,
704 enum wpa_alg alg
, const u8
*addr
, int idx
,
705 u8
*key
, size_t key_len
)
707 if (wpa_auth
->cb
.set_key
== NULL
)
709 return wpa_auth
->cb
.set_key(wpa_auth
->cb
.ctx
, vlan_id
, alg
, addr
, idx
,
714 void wpa_ft_install_ptk(struct wpa_state_machine
*sm
)
719 /* MLME-SETKEYS.request(PTK) */
720 if (sm
->pairwise
== WPA_CIPHER_TKIP
) {
723 } else if (sm
->pairwise
== WPA_CIPHER_CCMP
) {
727 wpa_printf(MSG_DEBUG
, "FT: Unknown pairwise alg 0x%x - skip "
728 "PTK configuration", sm
->pairwise
);
732 /* FIX: add STA entry to kernel/driver here? The set_key will fail
733 * most likely without this.. At the moment, STA entry is added only
734 * after association has been completed. This function will be called
735 * again after association to get the PTK configured, but that could be
736 * optimized by adding the STA entry earlier.
738 if (wpa_auth_set_key(sm
->wpa_auth
, 0, alg
, sm
->addr
, 0,
742 /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
743 sm
->pairwise_set
= TRUE
;
747 static u16
wpa_ft_process_auth_req(struct wpa_state_machine
*sm
,
748 const u8
*ies
, size_t ies_len
,
749 u8
**resp_ies
, size_t *resp_ies_len
)
751 struct rsn_mdie
*mdie
;
752 struct rsn_ftie
*ftie
;
753 u8 pmk_r1
[PMK_LEN
], pmk_r1_name
[WPA_PMK_NAME_LEN
];
754 u8 ptk_name
[WPA_PMK_NAME_LEN
];
755 struct wpa_auth_config
*conf
;
756 struct wpa_ft_ies parse
;
757 size_t buflen
, ptk_len
;
765 sm
->pmk_r1_name_valid
= 0;
766 conf
= &sm
->wpa_auth
->conf
;
768 wpa_hexdump(MSG_DEBUG
, "FT: Received authentication frame IEs",
771 if (wpa_ft_parse_ies(ies
, ies_len
, &parse
) < 0) {
772 wpa_printf(MSG_DEBUG
, "FT: Failed to parse FT IEs");
773 return WLAN_STATUS_UNSPECIFIED_FAILURE
;
776 mdie
= (struct rsn_mdie
*) parse
.mdie
;
777 if (mdie
== NULL
|| parse
.mdie_len
< sizeof(*mdie
) ||
778 os_memcmp(mdie
->mobility_domain
,
779 sm
->wpa_auth
->conf
.mobility_domain
,
780 MOBILITY_DOMAIN_ID_LEN
) != 0) {
781 wpa_printf(MSG_DEBUG
, "FT: Invalid MDIE");
782 return WLAN_STATUS_INVALID_MDIE
;
785 ftie
= (struct rsn_ftie
*) parse
.ftie
;
786 if (ftie
== NULL
|| parse
.ftie_len
< sizeof(*ftie
)) {
787 wpa_printf(MSG_DEBUG
, "FT: Invalid FTIE");
788 return WLAN_STATUS_INVALID_FTIE
;
791 os_memcpy(sm
->SNonce
, ftie
->snonce
, WPA_NONCE_LEN
);
793 if (parse
.r0kh_id
== NULL
) {
794 wpa_printf(MSG_DEBUG
, "FT: Invalid FTIE - no R0KH-ID");
795 return WLAN_STATUS_INVALID_FTIE
;
798 wpa_hexdump(MSG_DEBUG
, "FT: STA R0KH-ID",
799 parse
.r0kh_id
, parse
.r0kh_id_len
);
800 os_memcpy(sm
->r0kh_id
, parse
.r0kh_id
, parse
.r0kh_id_len
);
801 sm
->r0kh_id_len
= parse
.r0kh_id_len
;
803 if (parse
.rsn_pmkid
== NULL
) {
804 wpa_printf(MSG_DEBUG
, "FT: No PMKID in RSNIE");
805 return WLAN_STATUS_INVALID_PMKID
;
808 wpa_hexdump(MSG_DEBUG
, "FT: Requested PMKR0Name",
809 parse
.rsn_pmkid
, WPA_PMK_NAME_LEN
);
810 wpa_derive_pmk_r1_name(parse
.rsn_pmkid
,
811 sm
->wpa_auth
->conf
.r1_key_holder
, sm
->addr
,
813 wpa_hexdump(MSG_DEBUG
, "FT: Derived requested PMKR1Name",
814 pmk_r1_name
, WPA_PMK_NAME_LEN
);
816 if (wpa_ft_fetch_pmk_r1(sm
->wpa_auth
, sm
->addr
, pmk_r1_name
, pmk_r1
,
818 if (wpa_ft_pull_pmk_r1(sm
->wpa_auth
, sm
->addr
, sm
->r0kh_id
,
819 sm
->r0kh_id_len
, parse
.rsn_pmkid
) < 0) {
820 wpa_printf(MSG_DEBUG
, "FT: Did not have matching "
821 "PMK-R1 and unknown R0KH-ID");
822 return WLAN_STATUS_INVALID_PMKID
;
826 * TODO: Should return "status pending" (and the caller should
827 * not send out response now). The real response will be sent
828 * once the response from R0KH is received.
830 return WLAN_STATUS_INVALID_PMKID
;
833 wpa_hexdump_key(MSG_DEBUG
, "FT: Selected PMK-R1", pmk_r1
, PMK_LEN
);
834 sm
->pmk_r1_name_valid
= 1;
835 os_memcpy(sm
->pmk_r1_name
, pmk_r1_name
, WPA_PMK_NAME_LEN
);
837 if (random_get_bytes(sm
->ANonce
, WPA_NONCE_LEN
)) {
838 wpa_printf(MSG_DEBUG
, "FT: Failed to get random data for "
840 return WLAN_STATUS_UNSPECIFIED_FAILURE
;
843 wpa_hexdump(MSG_DEBUG
, "FT: Received SNonce",
844 sm
->SNonce
, WPA_NONCE_LEN
);
845 wpa_hexdump(MSG_DEBUG
, "FT: Generated ANonce",
846 sm
->ANonce
, WPA_NONCE_LEN
);
848 ptk_len
= pairwise
!= WPA_CIPHER_CCMP
? 64 : 48;
849 wpa_pmk_r1_to_ptk(pmk_r1
, sm
->SNonce
, sm
->ANonce
, sm
->addr
,
850 sm
->wpa_auth
->addr
, pmk_r1_name
,
851 (u8
*) &sm
->PTK
, ptk_len
, ptk_name
);
852 wpa_hexdump_key(MSG_DEBUG
, "FT: PTK",
853 (u8
*) &sm
->PTK
, ptk_len
);
854 wpa_hexdump(MSG_DEBUG
, "FT: PTKName", ptk_name
, WPA_PMK_NAME_LEN
);
856 sm
->pairwise
= pairwise
;
857 wpa_ft_install_ptk(sm
);
859 buflen
= 2 + sizeof(struct rsn_mdie
) + 2 + sizeof(struct rsn_ftie
) +
860 2 + FT_R1KH_ID_LEN
+ 200;
861 *resp_ies
= os_zalloc(buflen
);
862 if (*resp_ies
== NULL
) {
863 return WLAN_STATUS_UNSPECIFIED_FAILURE
;
867 end
= *resp_ies
+ buflen
;
869 ret
= wpa_write_rsn_ie(conf
, pos
, end
- pos
, parse
.rsn_pmkid
);
873 return WLAN_STATUS_UNSPECIFIED_FAILURE
;
877 ret
= wpa_write_mdie(conf
, pos
, end
- pos
);
881 return WLAN_STATUS_UNSPECIFIED_FAILURE
;
885 ret
= wpa_write_ftie(conf
, parse
.r0kh_id
, parse
.r0kh_id_len
,
886 sm
->ANonce
, sm
->SNonce
, pos
, end
- pos
, NULL
, 0);
890 return WLAN_STATUS_UNSPECIFIED_FAILURE
;
894 *resp_ies_len
= pos
- *resp_ies
;
896 return WLAN_STATUS_SUCCESS
;
900 void wpa_ft_process_auth(struct wpa_state_machine
*sm
, const u8
*bssid
,
901 u16 auth_transaction
, const u8
*ies
, size_t ies_len
,
902 void (*cb
)(void *ctx
, const u8
*dst
, const u8
*bssid
,
903 u16 auth_transaction
, u16 status
,
904 const u8
*ies
, size_t ies_len
),
912 wpa_printf(MSG_DEBUG
, "FT: Received authentication frame, but "
913 "WPA SM not available");
917 wpa_printf(MSG_DEBUG
, "FT: Received authentication frame: STA=" MACSTR
918 " BSSID=" MACSTR
" transaction=%d",
919 MAC2STR(sm
->addr
), MAC2STR(bssid
), auth_transaction
);
920 status
= wpa_ft_process_auth_req(sm
, ies
, ies_len
, &resp_ies
,
923 wpa_printf(MSG_DEBUG
, "FT: FT authentication response: dst=" MACSTR
924 " auth_transaction=%d status=%d",
925 MAC2STR(sm
->addr
), auth_transaction
+ 1, status
);
926 wpa_hexdump(MSG_DEBUG
, "FT: Response IEs", resp_ies
, resp_ies_len
);
927 cb(ctx
, sm
->addr
, bssid
, auth_transaction
+ 1, status
,
928 resp_ies
, resp_ies_len
);
933 u16
wpa_ft_validate_reassoc(struct wpa_state_machine
*sm
, const u8
*ies
,
936 struct wpa_ft_ies parse
;
937 struct rsn_mdie
*mdie
;
938 struct rsn_ftie
*ftie
;
943 return WLAN_STATUS_UNSPECIFIED_FAILURE
;
945 wpa_hexdump(MSG_DEBUG
, "FT: Reassoc Req IEs", ies
, ies_len
);
947 if (wpa_ft_parse_ies(ies
, ies_len
, &parse
) < 0) {
948 wpa_printf(MSG_DEBUG
, "FT: Failed to parse FT IEs");
949 return WLAN_STATUS_UNSPECIFIED_FAILURE
;
952 if (parse
.rsn
== NULL
) {
953 wpa_printf(MSG_DEBUG
, "FT: No RSNIE in Reassoc Req");
954 return WLAN_STATUS_UNSPECIFIED_FAILURE
;
957 if (parse
.rsn_pmkid
== NULL
) {
958 wpa_printf(MSG_DEBUG
, "FT: No PMKID in RSNIE");
959 return WLAN_STATUS_INVALID_PMKID
;
962 if (os_memcmp(parse
.rsn_pmkid
, sm
->pmk_r1_name
, WPA_PMK_NAME_LEN
) != 0)
964 wpa_printf(MSG_DEBUG
, "FT: PMKID in Reassoc Req did not match "
965 "with the PMKR1Name derived from auth request");
966 return WLAN_STATUS_INVALID_PMKID
;
969 mdie
= (struct rsn_mdie
*) parse
.mdie
;
970 if (mdie
== NULL
|| parse
.mdie_len
< sizeof(*mdie
) ||
971 os_memcmp(mdie
->mobility_domain
,
972 sm
->wpa_auth
->conf
.mobility_domain
,
973 MOBILITY_DOMAIN_ID_LEN
) != 0) {
974 wpa_printf(MSG_DEBUG
, "FT: Invalid MDIE");
975 return WLAN_STATUS_INVALID_MDIE
;
978 ftie
= (struct rsn_ftie
*) parse
.ftie
;
979 if (ftie
== NULL
|| parse
.ftie_len
< sizeof(*ftie
)) {
980 wpa_printf(MSG_DEBUG
, "FT: Invalid FTIE");
981 return WLAN_STATUS_INVALID_FTIE
;
984 if (os_memcmp(ftie
->snonce
, sm
->SNonce
, WPA_NONCE_LEN
) != 0) {
985 wpa_printf(MSG_DEBUG
, "FT: SNonce mismatch in FTIE");
986 wpa_hexdump(MSG_DEBUG
, "FT: Received SNonce",
987 ftie
->snonce
, WPA_NONCE_LEN
);
988 wpa_hexdump(MSG_DEBUG
, "FT: Expected SNonce",
989 sm
->SNonce
, WPA_NONCE_LEN
);
993 if (os_memcmp(ftie
->anonce
, sm
->ANonce
, WPA_NONCE_LEN
) != 0) {
994 wpa_printf(MSG_DEBUG
, "FT: ANonce mismatch in FTIE");
995 wpa_hexdump(MSG_DEBUG
, "FT: Received ANonce",
996 ftie
->anonce
, WPA_NONCE_LEN
);
997 wpa_hexdump(MSG_DEBUG
, "FT: Expected ANonce",
998 sm
->ANonce
, WPA_NONCE_LEN
);
1003 if (parse
.r0kh_id
== NULL
) {
1004 wpa_printf(MSG_DEBUG
, "FT: No R0KH-ID subelem in FTIE");
1008 if (parse
.r0kh_id_len
!= sm
->r0kh_id_len
||
1009 os_memcmp(parse
.r0kh_id
, sm
->r0kh_id
, parse
.r0kh_id_len
) != 0) {
1010 wpa_printf(MSG_DEBUG
, "FT: R0KH-ID in FTIE did not match with "
1011 "the current R0KH-ID");
1012 wpa_hexdump(MSG_DEBUG
, "FT: R0KH-ID in FTIE",
1013 parse
.r0kh_id
, parse
.r0kh_id_len
);
1014 wpa_hexdump(MSG_DEBUG
, "FT: The current R0KH-ID",
1015 sm
->r0kh_id
, sm
->r0kh_id_len
);
1019 if (parse
.r1kh_id
== NULL
) {
1020 wpa_printf(MSG_DEBUG
, "FT: No R1KH-ID subelem in FTIE");
1024 if (os_memcmp(parse
.r1kh_id
, sm
->wpa_auth
->conf
.r1_key_holder
,
1025 FT_R1KH_ID_LEN
) != 0) {
1026 wpa_printf(MSG_DEBUG
, "FT: Unknown R1KH-ID used in "
1028 wpa_hexdump(MSG_DEBUG
, "FT: R1KH-ID in FTIE",
1029 parse
.r1kh_id
, FT_R1KH_ID_LEN
);
1030 wpa_hexdump(MSG_DEBUG
, "FT: Expected R1KH-ID",
1031 sm
->wpa_auth
->conf
.r1_key_holder
, FT_R1KH_ID_LEN
);
1035 if (parse
.rsn_pmkid
== NULL
||
1036 os_memcmp(parse
.rsn_pmkid
, sm
->pmk_r1_name
, WPA_PMK_NAME_LEN
)) {
1037 wpa_printf(MSG_DEBUG
, "FT: No matching PMKR1Name (PMKID) in "
1038 "RSNIE (pmkid=%d)", !!parse
.rsn_pmkid
);
1044 count
+= ieee802_11_ie_count(parse
.ric
, parse
.ric_len
);
1045 if (ftie
->mic_control
[1] != count
) {
1046 wpa_printf(MSG_DEBUG
, "FT: Unexpected IE count in MIC "
1047 "Control: received %u expected %u",
1048 ftie
->mic_control
[1], count
);
1052 if (wpa_ft_mic(sm
->PTK
.kck
, sm
->addr
, sm
->wpa_auth
->addr
, 5,
1053 parse
.mdie
- 2, parse
.mdie_len
+ 2,
1054 parse
.ftie
- 2, parse
.ftie_len
+ 2,
1055 parse
.rsn
- 2, parse
.rsn_len
+ 2,
1056 parse
.ric
, parse
.ric_len
,
1058 wpa_printf(MSG_DEBUG
, "FT: Failed to calculate MIC");
1059 return WLAN_STATUS_UNSPECIFIED_FAILURE
;
1062 if (os_memcmp(mic
, ftie
->mic
, 16) != 0) {
1063 wpa_printf(MSG_DEBUG
, "FT: Invalid MIC in FTIE");
1064 wpa_hexdump(MSG_MSGDUMP
, "FT: Received MIC", ftie
->mic
, 16);
1065 wpa_hexdump(MSG_MSGDUMP
, "FT: Calculated MIC", mic
, 16);
1066 return WLAN_STATUS_INVALID_FTIE
;
1069 return WLAN_STATUS_SUCCESS
;
1073 int wpa_ft_action_rx(struct wpa_state_machine
*sm
, const u8
*data
, size_t len
)
1075 const u8
*sta_addr
, *target_ap
;
1079 struct ft_rrb_frame
*frame
;
1085 * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6]
1086 * FT Request action frame body[variable]
1090 wpa_printf(MSG_DEBUG
, "FT: Too short FT Action frame "
1091 "(len=%lu)", (unsigned long) len
);
1096 sta_addr
= data
+ 2;
1097 target_ap
= data
+ 8;
1101 wpa_printf(MSG_DEBUG
, "FT: Received FT Action frame (STA=" MACSTR
1102 " Target AP=" MACSTR
" Action=%d)",
1103 MAC2STR(sta_addr
), MAC2STR(target_ap
), action
);
1105 if (os_memcmp(sta_addr
, sm
->addr
, ETH_ALEN
) != 0) {
1106 wpa_printf(MSG_DEBUG
, "FT: Mismatch in FT Action STA address: "
1107 "STA=" MACSTR
" STA-Address=" MACSTR
,
1108 MAC2STR(sm
->addr
), MAC2STR(sta_addr
));
1113 * Do some sanity checking on the target AP address (not own and not
1114 * broadcast. This could be extended to filter based on a list of known
1115 * APs in the MD (if such a list were configured).
1117 if ((target_ap
[0] & 0x01) ||
1118 os_memcmp(target_ap
, sm
->wpa_auth
->addr
, ETH_ALEN
) == 0) {
1119 wpa_printf(MSG_DEBUG
, "FT: Invalid Target AP in FT Action "
1124 wpa_hexdump(MSG_MSGDUMP
, "FT: Action frame body", ies
, ies_len
);
1126 /* RRB - Forward action frame to the target AP */
1127 frame
= os_malloc(sizeof(*frame
) + len
);
1128 frame
->frame_type
= RSN_REMOTE_FRAME_TYPE_FT_RRB
;
1129 frame
->packet_type
= FT_PACKET_REQUEST
;
1130 frame
->action_length
= host_to_le16(len
);
1131 os_memcpy(frame
->ap_address
, sm
->wpa_auth
->addr
, ETH_ALEN
);
1132 os_memcpy(frame
+ 1, data
, len
);
1134 wpa_ft_rrb_send(sm
->wpa_auth
, target_ap
, (u8
*) frame
,
1135 sizeof(*frame
) + len
);
1142 static int wpa_ft_rrb_rx_request(struct wpa_authenticator
*wpa_auth
,
1143 const u8
*current_ap
, const u8
*sta_addr
,
1144 const u8
*body
, size_t len
)
1146 struct wpa_state_machine
*sm
;
1149 size_t resp_ies_len
, rlen
;
1150 struct ft_rrb_frame
*frame
;
1152 sm
= wpa_ft_add_sta(wpa_auth
, sta_addr
);
1154 wpa_printf(MSG_DEBUG
, "FT: Failed to add new STA based on "
1159 wpa_hexdump(MSG_MSGDUMP
, "FT: RRB Request Frame body", body
, len
);
1161 status
= wpa_ft_process_auth_req(sm
, body
, len
, &resp_ies
,
1164 wpa_printf(MSG_DEBUG
, "FT: RRB authentication response: STA=" MACSTR
1165 " CurrentAP=" MACSTR
" status=%d",
1166 MAC2STR(sm
->addr
), MAC2STR(current_ap
), status
);
1167 wpa_hexdump(MSG_DEBUG
, "FT: Response IEs", resp_ies
, resp_ies_len
);
1169 /* RRB - Forward action frame response to the Current AP */
1172 * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6]
1173 * Status_Code[2] FT Request action frame body[variable]
1175 rlen
= 2 + 2 * ETH_ALEN
+ 2 + resp_ies_len
;
1177 frame
= os_malloc(sizeof(*frame
) + rlen
);
1178 frame
->frame_type
= RSN_REMOTE_FRAME_TYPE_FT_RRB
;
1179 frame
->packet_type
= FT_PACKET_RESPONSE
;
1180 frame
->action_length
= host_to_le16(rlen
);
1181 os_memcpy(frame
->ap_address
, wpa_auth
->addr
, ETH_ALEN
);
1182 pos
= (u8
*) (frame
+ 1);
1183 *pos
++ = WLAN_ACTION_FT
;
1184 *pos
++ = 2; /* Action: Response */
1185 os_memcpy(pos
, sta_addr
, ETH_ALEN
);
1187 os_memcpy(pos
, wpa_auth
->addr
, ETH_ALEN
);
1189 WPA_PUT_LE16(pos
, status
);
1192 os_memcpy(pos
, resp_ies
, resp_ies_len
);
1196 wpa_ft_rrb_send(wpa_auth
, current_ap
, (u8
*) frame
,
1197 sizeof(*frame
) + rlen
);
1204 static int wpa_ft_rrb_rx_pull(struct wpa_authenticator
*wpa_auth
,
1206 const u8
*data
, size_t data_len
)
1208 struct ft_r0kh_r1kh_pull_frame
*frame
, f
;
1209 struct ft_remote_r1kh
*r1kh
;
1210 struct ft_r0kh_r1kh_resp_frame resp
, r
;
1214 wpa_printf(MSG_DEBUG
, "FT: Received PMK-R1 pull");
1216 if (data_len
< sizeof(*frame
))
1219 r1kh
= wpa_auth
->conf
.r1kh_list
;
1221 if (os_memcmp(r1kh
->addr
, src_addr
, ETH_ALEN
) == 0)
1226 wpa_printf(MSG_DEBUG
, "FT: No matching R1KH address found for "
1227 "PMK-R1 pull source address " MACSTR
,
1232 frame
= (struct ft_r0kh_r1kh_pull_frame
*) data
;
1233 /* aes_unwrap() does not support inplace decryption, so use a temporary
1234 * buffer for the data. */
1235 if (aes_unwrap(r1kh
->key
, (FT_R0KH_R1KH_PULL_DATA_LEN
+ 7) / 8,
1236 frame
->nonce
, f
.nonce
) < 0) {
1237 wpa_printf(MSG_DEBUG
, "FT: Failed to decrypt PMK-R1 pull "
1238 "request from " MACSTR
, MAC2STR(src_addr
));
1242 wpa_hexdump(MSG_DEBUG
, "FT: PMK-R1 pull - nonce",
1243 f
.nonce
, sizeof(f
.nonce
));
1244 wpa_hexdump(MSG_DEBUG
, "FT: PMK-R1 pull - PMKR0Name",
1245 f
.pmk_r0_name
, WPA_PMK_NAME_LEN
);
1246 wpa_printf(MSG_DEBUG
, "FT: PMK-R1 pull - R1KH-ID=" MACSTR
"S1KH-ID="
1247 MACSTR
, MAC2STR(f
.r1kh_id
), MAC2STR(f
.s1kh_id
));
1249 os_memset(&resp
, 0, sizeof(resp
));
1250 resp
.frame_type
= RSN_REMOTE_FRAME_TYPE_FT_RRB
;
1251 resp
.packet_type
= FT_PACKET_R0KH_R1KH_RESP
;
1252 resp
.data_length
= host_to_le16(FT_R0KH_R1KH_RESP_DATA_LEN
);
1253 os_memcpy(resp
.ap_address
, wpa_auth
->addr
, ETH_ALEN
);
1255 /* aes_wrap() does not support inplace encryption, so use a temporary
1256 * buffer for the data. */
1257 os_memcpy(r
.nonce
, f
.nonce
, sizeof(f
.nonce
));
1258 os_memcpy(r
.r1kh_id
, f
.r1kh_id
, FT_R1KH_ID_LEN
);
1259 os_memcpy(r
.s1kh_id
, f
.s1kh_id
, ETH_ALEN
);
1260 if (wpa_ft_fetch_pmk_r0(wpa_auth
, f
.s1kh_id
, f
.pmk_r0_name
, pmk_r0
,
1262 wpa_printf(MSG_DEBUG
, "FT: No matching PMKR0Name found for "
1267 wpa_derive_pmk_r1(pmk_r0
, f
.pmk_r0_name
, f
.r1kh_id
, f
.s1kh_id
,
1268 r
.pmk_r1
, r
.pmk_r1_name
);
1269 wpa_hexdump_key(MSG_DEBUG
, "FT: PMK-R1", r
.pmk_r1
, PMK_LEN
);
1270 wpa_hexdump(MSG_DEBUG
, "FT: PMKR1Name", r
.pmk_r1_name
,
1272 r
.pairwise
= host_to_le16(pairwise
);
1274 if (aes_wrap(r1kh
->key
, (FT_R0KH_R1KH_RESP_DATA_LEN
+ 7) / 8,
1275 r
.nonce
, resp
.nonce
) < 0) {
1276 os_memset(pmk_r0
, 0, PMK_LEN
);
1280 os_memset(pmk_r0
, 0, PMK_LEN
);
1282 wpa_ft_rrb_send(wpa_auth
, src_addr
, (u8
*) &resp
, sizeof(resp
));
1288 static int wpa_ft_rrb_rx_resp(struct wpa_authenticator
*wpa_auth
,
1290 const u8
*data
, size_t data_len
)
1292 struct ft_r0kh_r1kh_resp_frame
*frame
, f
;
1293 struct ft_remote_r0kh
*r0kh
;
1296 wpa_printf(MSG_DEBUG
, "FT: Received PMK-R1 pull response");
1298 if (data_len
< sizeof(*frame
))
1301 r0kh
= wpa_auth
->conf
.r0kh_list
;
1303 if (os_memcmp(r0kh
->addr
, src_addr
, ETH_ALEN
) == 0)
1308 wpa_printf(MSG_DEBUG
, "FT: No matching R0KH address found for "
1309 "PMK-R0 pull response source address " MACSTR
,
1314 frame
= (struct ft_r0kh_r1kh_resp_frame
*) data
;
1315 /* aes_unwrap() does not support inplace decryption, so use a temporary
1316 * buffer for the data. */
1317 if (aes_unwrap(r0kh
->key
, (FT_R0KH_R1KH_RESP_DATA_LEN
+ 7) / 8,
1318 frame
->nonce
, f
.nonce
) < 0) {
1319 wpa_printf(MSG_DEBUG
, "FT: Failed to decrypt PMK-R1 pull "
1320 "response from " MACSTR
, MAC2STR(src_addr
));
1324 if (os_memcmp(f
.r1kh_id
, wpa_auth
->conf
.r1_key_holder
, FT_R1KH_ID_LEN
)
1326 wpa_printf(MSG_DEBUG
, "FT: PMK-R1 pull response did not use a "
1327 "matching R1KH-ID");
1331 /* TODO: verify that <nonce,s1kh_id> matches with a pending request
1332 * and call this requests callback function to finish request
1335 pairwise
= le_to_host16(f
.pairwise
);
1336 wpa_hexdump(MSG_DEBUG
, "FT: PMK-R1 pull - nonce",
1337 f
.nonce
, sizeof(f
.nonce
));
1338 wpa_printf(MSG_DEBUG
, "FT: PMK-R1 pull - R1KH-ID=" MACSTR
"S1KH-ID="
1339 MACSTR
" pairwise=0x%x",
1340 MAC2STR(f
.r1kh_id
), MAC2STR(f
.s1kh_id
), pairwise
);
1341 wpa_hexdump_key(MSG_DEBUG
, "FT: PMK-R1 pull - PMK-R1",
1343 wpa_hexdump(MSG_DEBUG
, "FT: PMK-R1 pull - PMKR1Name",
1344 f
.pmk_r1_name
, WPA_PMK_NAME_LEN
);
1346 wpa_ft_store_pmk_r1(wpa_auth
, f
.s1kh_id
, f
.pmk_r1
, f
.pmk_r1_name
,
1348 os_memset(f
.pmk_r1
, 0, PMK_LEN
);
1354 static int wpa_ft_rrb_rx_push(struct wpa_authenticator
*wpa_auth
,
1356 const u8
*data
, size_t data_len
)
1358 struct ft_r0kh_r1kh_push_frame
*frame
, f
;
1359 struct ft_remote_r0kh
*r0kh
;
1364 wpa_printf(MSG_DEBUG
, "FT: Received PMK-R1 push");
1366 if (data_len
< sizeof(*frame
))
1369 r0kh
= wpa_auth
->conf
.r0kh_list
;
1371 if (os_memcmp(r0kh
->addr
, src_addr
, ETH_ALEN
) == 0)
1376 wpa_printf(MSG_DEBUG
, "FT: No matching R0KH address found for "
1377 "PMK-R0 push source address " MACSTR
,
1382 frame
= (struct ft_r0kh_r1kh_push_frame
*) data
;
1383 /* aes_unwrap() does not support inplace decryption, so use a temporary
1384 * buffer for the data. */
1385 if (aes_unwrap(r0kh
->key
, (FT_R0KH_R1KH_PUSH_DATA_LEN
+ 7) / 8,
1386 frame
->timestamp
, f
.timestamp
) < 0) {
1387 wpa_printf(MSG_DEBUG
, "FT: Failed to decrypt PMK-R1 push from "
1388 MACSTR
, MAC2STR(src_addr
));
1393 tsend
= WPA_GET_LE32(f
.timestamp
);
1394 if ((now
.sec
> tsend
&& now
.sec
- tsend
> 60) ||
1395 (now
.sec
< tsend
&& tsend
- now
.sec
> 60)) {
1396 wpa_printf(MSG_DEBUG
, "FT: PMK-R1 push did not have a valid "
1397 "timestamp: sender time %d own time %d\n",
1398 (int) tsend
, (int) now
.sec
);
1402 if (os_memcmp(f
.r1kh_id
, wpa_auth
->conf
.r1_key_holder
, FT_R1KH_ID_LEN
)
1404 wpa_printf(MSG_DEBUG
, "FT: PMK-R1 push did not use a matching "
1405 "R1KH-ID (received " MACSTR
" own " MACSTR
")",
1407 MAC2STR(wpa_auth
->conf
.r1_key_holder
));
1411 pairwise
= le_to_host16(f
.pairwise
);
1412 wpa_printf(MSG_DEBUG
, "FT: PMK-R1 push - R1KH-ID=" MACSTR
" S1KH-ID="
1413 MACSTR
" pairwise=0x%x",
1414 MAC2STR(f
.r1kh_id
), MAC2STR(f
.s1kh_id
), pairwise
);
1415 wpa_hexdump_key(MSG_DEBUG
, "FT: PMK-R1 push - PMK-R1",
1417 wpa_hexdump(MSG_DEBUG
, "FT: PMK-R1 push - PMKR1Name",
1418 f
.pmk_r1_name
, WPA_PMK_NAME_LEN
);
1420 wpa_ft_store_pmk_r1(wpa_auth
, f
.s1kh_id
, f
.pmk_r1
, f
.pmk_r1_name
,
1422 os_memset(f
.pmk_r1
, 0, PMK_LEN
);
1428 int wpa_ft_rrb_rx(struct wpa_authenticator
*wpa_auth
, const u8
*src_addr
,
1429 const u8
*data
, size_t data_len
)
1431 struct ft_rrb_frame
*frame
;
1433 const u8
*pos
, *end
, *start
;
1435 const u8
*sta_addr
, *target_ap_addr
;
1437 wpa_printf(MSG_DEBUG
, "FT: RRB received frame from remote AP " MACSTR
,
1440 if (data_len
< sizeof(*frame
)) {
1441 wpa_printf(MSG_DEBUG
, "FT: Too short RRB frame (data_len=%lu)",
1442 (unsigned long) data_len
);
1447 frame
= (struct ft_rrb_frame
*) pos
;
1448 pos
+= sizeof(*frame
);
1450 alen
= le_to_host16(frame
->action_length
);
1451 wpa_printf(MSG_DEBUG
, "FT: RRB frame - frame_type=%d packet_type=%d "
1452 "action_length=%d ap_address=" MACSTR
,
1453 frame
->frame_type
, frame
->packet_type
, alen
,
1454 MAC2STR(frame
->ap_address
));
1456 if (frame
->frame_type
!= RSN_REMOTE_FRAME_TYPE_FT_RRB
) {
1457 /* Discard frame per IEEE Std 802.11r-2008, 11A.10.3 */
1458 wpa_printf(MSG_DEBUG
, "FT: RRB discarded frame with "
1459 "unrecognized type %d", frame
->frame_type
);
1463 if (alen
> data_len
- sizeof(*frame
)) {
1464 wpa_printf(MSG_DEBUG
, "FT: RRB frame too short for action "
1469 if (frame
->packet_type
== FT_PACKET_R0KH_R1KH_PULL
)
1470 return wpa_ft_rrb_rx_pull(wpa_auth
, src_addr
, data
, data_len
);
1471 if (frame
->packet_type
== FT_PACKET_R0KH_R1KH_RESP
)
1472 return wpa_ft_rrb_rx_resp(wpa_auth
, src_addr
, data
, data_len
);
1473 if (frame
->packet_type
== FT_PACKET_R0KH_R1KH_PUSH
)
1474 return wpa_ft_rrb_rx_push(wpa_auth
, src_addr
, data
, data_len
);
1476 wpa_hexdump(MSG_MSGDUMP
, "FT: RRB - FT Action frame", pos
, alen
);
1478 if (alen
< 1 + 1 + 2 * ETH_ALEN
) {
1479 wpa_printf(MSG_DEBUG
, "FT: Too short RRB frame (not enough "
1480 "room for Action Frame body); alen=%lu",
1481 (unsigned long) alen
);
1487 if (*pos
!= WLAN_ACTION_FT
) {
1488 wpa_printf(MSG_DEBUG
, "FT: Unexpected Action frame category "
1497 target_ap_addr
= pos
;
1499 wpa_printf(MSG_DEBUG
, "FT: RRB Action Frame: action=%d sta_addr="
1500 MACSTR
" target_ap_addr=" MACSTR
,
1501 action
, MAC2STR(sta_addr
), MAC2STR(target_ap_addr
));
1503 if (frame
->packet_type
== FT_PACKET_REQUEST
) {
1504 wpa_printf(MSG_DEBUG
, "FT: FT Packet Type - Request");
1507 wpa_printf(MSG_DEBUG
, "FT: Unexpected Action %d in "
1508 "RRB Request", action
);
1512 if (os_memcmp(target_ap_addr
, wpa_auth
->addr
, ETH_ALEN
) != 0) {
1513 wpa_printf(MSG_DEBUG
, "FT: Target AP address in the "
1514 "RRB Request does not match with own "
1519 if (wpa_ft_rrb_rx_request(wpa_auth
, frame
->ap_address
,
1520 sta_addr
, pos
, end
- pos
) < 0)
1522 } else if (frame
->packet_type
== FT_PACKET_RESPONSE
) {
1525 if (end
- pos
< 2) {
1526 wpa_printf(MSG_DEBUG
, "FT: Not enough room for status "
1527 "code in RRB Response");
1530 status_code
= WPA_GET_LE16(pos
);
1533 wpa_printf(MSG_DEBUG
, "FT: FT Packet Type - Response "
1534 "(status_code=%d)", status_code
);
1536 if (wpa_ft_action_send(wpa_auth
, sta_addr
, start
, alen
) < 0)
1539 wpa_printf(MSG_DEBUG
, "FT: RRB discarded frame with unknown "
1540 "packet_type %d", frame
->packet_type
);
1548 static void wpa_ft_generate_pmk_r1(struct wpa_authenticator
*wpa_auth
,
1549 struct wpa_ft_pmk_r0_sa
*pmk_r0
,
1550 struct ft_remote_r1kh
*r1kh
,
1551 const u8
*s1kh_id
, int pairwise
)
1553 struct ft_r0kh_r1kh_push_frame frame
, f
;
1556 os_memset(&frame
, 0, sizeof(frame
));
1557 frame
.frame_type
= RSN_REMOTE_FRAME_TYPE_FT_RRB
;
1558 frame
.packet_type
= FT_PACKET_R0KH_R1KH_PUSH
;
1559 frame
.data_length
= host_to_le16(FT_R0KH_R1KH_PUSH_DATA_LEN
);
1560 os_memcpy(frame
.ap_address
, wpa_auth
->addr
, ETH_ALEN
);
1562 /* aes_wrap() does not support inplace encryption, so use a temporary
1563 * buffer for the data. */
1564 os_memcpy(f
.r1kh_id
, r1kh
->id
, FT_R1KH_ID_LEN
);
1565 os_memcpy(f
.s1kh_id
, s1kh_id
, ETH_ALEN
);
1566 os_memcpy(f
.pmk_r0_name
, pmk_r0
->pmk_r0_name
, WPA_PMK_NAME_LEN
);
1567 wpa_derive_pmk_r1(pmk_r0
->pmk_r0
, pmk_r0
->pmk_r0_name
, r1kh
->id
,
1568 s1kh_id
, f
.pmk_r1
, f
.pmk_r1_name
);
1569 wpa_printf(MSG_DEBUG
, "FT: R1KH-ID " MACSTR
, MAC2STR(r1kh
->id
));
1570 wpa_hexdump_key(MSG_DEBUG
, "FT: PMK-R1", f
.pmk_r1
, PMK_LEN
);
1571 wpa_hexdump(MSG_DEBUG
, "FT: PMKR1Name", f
.pmk_r1_name
,
1574 WPA_PUT_LE32(f
.timestamp
, now
.sec
);
1575 f
.pairwise
= host_to_le16(pairwise
);
1576 if (aes_wrap(r1kh
->key
, (FT_R0KH_R1KH_PUSH_DATA_LEN
+ 7) / 8,
1577 f
.timestamp
, frame
.timestamp
) < 0)
1580 wpa_ft_rrb_send(wpa_auth
, r1kh
->addr
, (u8
*) &frame
, sizeof(frame
));
1584 void wpa_ft_push_pmk_r1(struct wpa_authenticator
*wpa_auth
, const u8
*addr
)
1586 struct wpa_ft_pmk_r0_sa
*r0
;
1587 struct ft_remote_r1kh
*r1kh
;
1589 if (!wpa_auth
->conf
.pmk_r1_push
)
1592 r0
= wpa_auth
->ft_pmk_cache
->pmk_r0
;
1594 if (os_memcmp(r0
->spa
, addr
, ETH_ALEN
) == 0)
1599 if (r0
== NULL
|| r0
->pmk_r1_pushed
)
1601 r0
->pmk_r1_pushed
= 1;
1603 wpa_printf(MSG_DEBUG
, "FT: Deriving and pushing PMK-R1 keys to R1KHs "
1604 "for STA " MACSTR
, MAC2STR(addr
));
1606 r1kh
= wpa_auth
->conf
.r1kh_list
;
1608 wpa_ft_generate_pmk_r1(wpa_auth
, r0
, r1kh
, addr
, r0
->pairwise
);
1613 #endif /* CONFIG_IEEE80211R */