2 * wpa_supplicant - IBSS RSN
3 * Copyright (c) 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.
18 #include "l2_packet/l2_packet.h"
19 #include "rsn_supp/wpa.h"
20 #include "rsn_supp/wpa_ie.h"
21 #include "ap/wpa_auth.h"
22 #include "wpa_supplicant_i.h"
27 static void ibss_rsn_free(struct ibss_rsn_peer
*peer
)
29 wpa_auth_sta_deinit(peer
->auth
);
30 wpa_sm_deinit(peer
->supp
);
35 static void supp_set_state(void *ctx
, enum wpa_states state
)
37 struct ibss_rsn_peer
*peer
= ctx
;
38 peer
->supp_state
= state
;
42 static int supp_ether_send(void *ctx
, const u8
*dest
, u16 proto
, const u8
*buf
,
45 struct ibss_rsn_peer
*peer
= ctx
;
46 struct wpa_supplicant
*wpa_s
= peer
->ibss_rsn
->wpa_s
;
48 wpa_printf(MSG_DEBUG
, "SUPP: %s(dest=" MACSTR
" proto=0x%04x "
50 __func__
, MAC2STR(dest
), proto
, (unsigned long) len
);
53 return l2_packet_send(wpa_s
->l2
, dest
, proto
, buf
, len
);
55 return wpa_drv_send_eapol(wpa_s
, dest
, proto
, buf
, len
);
59 static u8
* supp_alloc_eapol(void *ctx
, u8 type
, const void *data
,
60 u16 data_len
, size_t *msg_len
, void **data_pos
)
62 struct ieee802_1x_hdr
*hdr
;
64 wpa_printf(MSG_DEBUG
, "SUPP: %s(type=%d data_len=%d)",
65 __func__
, type
, data_len
);
67 *msg_len
= sizeof(*hdr
) + data_len
;
68 hdr
= os_malloc(*msg_len
);
74 hdr
->length
= host_to_be16(data_len
);
77 os_memcpy(hdr
+ 1, data
, data_len
);
79 os_memset(hdr
+ 1, 0, data_len
);
88 static int supp_get_beacon_ie(void *ctx
)
90 struct ibss_rsn_peer
*peer
= ctx
;
92 wpa_printf(MSG_DEBUG
, "SUPP: %s", __func__
);
93 /* TODO: get correct RSN IE */
94 return wpa_sm_set_ap_rsn_ie(peer
->supp
,
95 (u8
*) "\x30\x14\x01\x00"
97 "\x01\x00\x00\x0f\xac\x04"
98 "\x01\x00\x00\x0f\xac\x02"
103 static int supp_set_key(void *ctx
, enum wpa_alg alg
,
104 const u8
*addr
, int key_idx
, int set_tx
,
105 const u8
*seq
, size_t seq_len
,
106 const u8
*key
, size_t key_len
)
108 struct ibss_rsn_peer
*peer
= ctx
;
110 wpa_printf(MSG_DEBUG
, "SUPP: %s(alg=%d addr=" MACSTR
" key_idx=%d "
112 __func__
, alg
, MAC2STR(addr
), key_idx
, set_tx
);
113 wpa_hexdump(MSG_DEBUG
, "SUPP: set_key - seq", seq
, seq_len
);
114 wpa_hexdump_key(MSG_DEBUG
, "SUPP: set_key - key", key
, key_len
);
118 * In IBSS RSN, the pairwise key from the 4-way handshake
119 * initiated by the peer with highest MAC address is used.
121 if (os_memcmp(peer
->ibss_rsn
->wpa_s
->own_addr
, peer
->addr
,
123 wpa_printf(MSG_DEBUG
, "SUPP: Do not use this PTK");
128 if (is_broadcast_ether_addr(addr
) && peer
->addr
)
130 return wpa_drv_set_key(peer
->ibss_rsn
->wpa_s
, alg
, addr
, key_idx
,
131 set_tx
, seq
, seq_len
, key
, key_len
);
135 static void * supp_get_network_ctx(void *ctx
)
137 struct ibss_rsn_peer
*peer
= ctx
;
138 return wpa_supplicant_get_ssid(peer
->ibss_rsn
->wpa_s
);
142 static int supp_mlme_setprotection(void *ctx
, const u8
*addr
,
143 int protection_type
, int key_type
)
145 wpa_printf(MSG_DEBUG
, "SUPP: %s(addr=" MACSTR
" protection_type=%d "
147 __func__
, MAC2STR(addr
), protection_type
, key_type
);
152 static void supp_cancel_auth_timeout(void *ctx
)
154 wpa_printf(MSG_DEBUG
, "SUPP: %s", __func__
);
158 static void supp_deauthenticate(void * ctx
, int reason_code
)
160 wpa_printf(MSG_DEBUG
, "SUPP: %s (TODO)", __func__
);
164 int ibss_rsn_supp_init(struct ibss_rsn_peer
*peer
, const u8
*own_addr
,
167 struct wpa_sm_ctx
*ctx
= os_zalloc(sizeof(*ctx
));
172 ctx
->msg_ctx
= peer
->ibss_rsn
->wpa_s
;
173 ctx
->set_state
= supp_set_state
;
174 ctx
->ether_send
= supp_ether_send
;
175 ctx
->get_beacon_ie
= supp_get_beacon_ie
;
176 ctx
->alloc_eapol
= supp_alloc_eapol
;
177 ctx
->set_key
= supp_set_key
;
178 ctx
->get_network_ctx
= supp_get_network_ctx
;
179 ctx
->mlme_setprotection
= supp_mlme_setprotection
;
180 ctx
->cancel_auth_timeout
= supp_cancel_auth_timeout
;
181 ctx
->deauthenticate
= supp_deauthenticate
;
182 peer
->supp
= wpa_sm_init(ctx
);
183 if (peer
->supp
== NULL
) {
184 wpa_printf(MSG_DEBUG
, "SUPP: wpa_sm_init() failed");
188 wpa_sm_set_own_addr(peer
->supp
, own_addr
);
189 wpa_sm_set_param(peer
->supp
, WPA_PARAM_RSN_ENABLED
, 1);
190 wpa_sm_set_param(peer
->supp
, WPA_PARAM_PROTO
, WPA_PROTO_RSN
);
191 wpa_sm_set_param(peer
->supp
, WPA_PARAM_PAIRWISE
, WPA_CIPHER_CCMP
);
192 wpa_sm_set_param(peer
->supp
, WPA_PARAM_GROUP
, WPA_CIPHER_CCMP
);
193 wpa_sm_set_param(peer
->supp
, WPA_PARAM_KEY_MGMT
, WPA_KEY_MGMT_PSK
);
194 wpa_sm_set_pmk(peer
->supp
, psk
, PMK_LEN
);
196 peer
->supp_ie_len
= sizeof(peer
->supp_ie
);
197 if (wpa_sm_set_assoc_wpa_ie_default(peer
->supp
, peer
->supp_ie
,
198 &peer
->supp_ie_len
) < 0) {
199 wpa_printf(MSG_DEBUG
, "SUPP: wpa_sm_set_assoc_wpa_ie_default()"
204 wpa_sm_notify_assoc(peer
->supp
, peer
->addr
);
210 static void auth_logger(void *ctx
, const u8
*addr
, logger_level level
,
214 wpa_printf(MSG_DEBUG
, "AUTH: " MACSTR
" - %s",
217 wpa_printf(MSG_DEBUG
, "AUTH: %s", txt
);
221 static const u8
* auth_get_psk(void *ctx
, const u8
*addr
, const u8
*prev_psk
)
223 struct ibss_rsn
*ibss_rsn
= ctx
;
224 wpa_printf(MSG_DEBUG
, "AUTH: %s (addr=" MACSTR
" prev_psk=%p)",
225 __func__
, MAC2STR(addr
), prev_psk
);
228 return ibss_rsn
->psk
;
232 static int auth_send_eapol(void *ctx
, const u8
*addr
, const u8
*data
,
233 size_t data_len
, int encrypt
)
235 struct ibss_rsn
*ibss_rsn
= ctx
;
236 struct wpa_supplicant
*wpa_s
= ibss_rsn
->wpa_s
;
238 wpa_printf(MSG_DEBUG
, "AUTH: %s(addr=" MACSTR
" data_len=%lu "
240 __func__
, MAC2STR(addr
), (unsigned long) data_len
, encrypt
);
243 return l2_packet_send(wpa_s
->l2
, addr
, ETH_P_EAPOL
, data
,
246 return wpa_drv_send_eapol(wpa_s
, addr
, ETH_P_EAPOL
, data
, data_len
);
250 static int auth_set_key(void *ctx
, int vlan_id
, enum wpa_alg alg
,
251 const u8
*addr
, int idx
, u8
*key
, size_t key_len
)
253 struct ibss_rsn
*ibss_rsn
= ctx
;
256 os_memset(seq
, 0, sizeof(seq
));
259 wpa_printf(MSG_DEBUG
, "AUTH: %s(alg=%d addr=" MACSTR
261 __func__
, alg
, MAC2STR(addr
), idx
);
263 wpa_printf(MSG_DEBUG
, "AUTH: %s(alg=%d key_idx=%d)",
266 wpa_hexdump_key(MSG_DEBUG
, "AUTH: set_key - key", key
, key_len
);
270 * In IBSS RSN, the pairwise key from the 4-way handshake
271 * initiated by the peer with highest MAC address is used.
274 os_memcmp(ibss_rsn
->wpa_s
->own_addr
, addr
, ETH_ALEN
) < 0) {
275 wpa_printf(MSG_DEBUG
, "AUTH: Do not use this PTK");
280 if (ibss_rsn
->init_in_progress
&& key_len
<=
281 sizeof(ibss_rsn
->init_gtk
)) {
282 wpa_printf(MSG_DEBUG
, "AUTH: Delay setting of initial TX GTK "
283 "until RSN IBSS is connected");
284 ibss_rsn
->init_gtk_idx
= idx
;
285 os_memcpy(ibss_rsn
->init_gtk
, key
, key_len
);
289 return wpa_drv_set_key(ibss_rsn
->wpa_s
, alg
, addr
, idx
,
290 1, seq
, 6, key
, key_len
);
294 static int ibss_rsn_auth_init_group(struct ibss_rsn
*ibss_rsn
,
297 struct wpa_auth_config conf
;
298 struct wpa_auth_callbacks cb
;
300 wpa_printf(MSG_DEBUG
, "AUTH: Initializing group state machine");
302 os_memset(&conf
, 0, sizeof(conf
));
304 conf
.wpa_key_mgmt
= WPA_KEY_MGMT_PSK
;
305 conf
.wpa_pairwise
= WPA_CIPHER_CCMP
;
306 conf
.rsn_pairwise
= WPA_CIPHER_CCMP
;
307 conf
.wpa_group
= WPA_CIPHER_CCMP
;
308 conf
.eapol_version
= 2;
310 os_memset(&cb
, 0, sizeof(cb
));
312 cb
.logger
= auth_logger
;
313 cb
.send_eapol
= auth_send_eapol
;
314 cb
.get_psk
= auth_get_psk
;
315 cb
.set_key
= auth_set_key
;
317 ibss_rsn
->init_in_progress
= 1;
318 ibss_rsn
->auth_group
= wpa_init(own_addr
, &conf
, &cb
);
319 ibss_rsn
->init_in_progress
= 0;
320 if (ibss_rsn
->auth_group
== NULL
) {
321 wpa_printf(MSG_DEBUG
, "AUTH: wpa_init() failed");
329 static int ibss_rsn_auth_init(struct ibss_rsn
*ibss_rsn
,
330 struct ibss_rsn_peer
*peer
)
332 peer
->auth
= wpa_auth_sta_init(ibss_rsn
->auth_group
, peer
->addr
);
333 if (peer
->auth
== NULL
) {
334 wpa_printf(MSG_DEBUG
, "AUTH: wpa_auth_sta_init() failed");
338 /* TODO: get peer RSN IE with Probe Request */
339 if (wpa_validate_wpa_ie(ibss_rsn
->auth_group
, peer
->auth
,
340 (u8
*) "\x30\x14\x01\x00"
342 "\x01\x00\x00\x0f\xac\x04"
343 "\x01\x00\x00\x0f\xac\x02"
344 "\x00\x00", 22, NULL
, 0) !=
346 wpa_printf(MSG_DEBUG
, "AUTH: wpa_validate_wpa_ie() failed");
350 if (wpa_auth_sm_event(peer
->auth
, WPA_ASSOC
))
353 if (wpa_auth_sta_associated(ibss_rsn
->auth_group
, peer
->auth
))
360 int ibss_rsn_start(struct ibss_rsn
*ibss_rsn
, const u8
*addr
)
362 struct ibss_rsn_peer
*peer
;
364 for (peer
= ibss_rsn
->peers
; peer
; peer
= peer
->next
) {
365 if (os_memcmp(addr
, peer
->addr
, ETH_ALEN
) == 0) {
366 wpa_printf(MSG_DEBUG
, "RSN: IBSS Authenticator and "
367 "Supplicant for peer " MACSTR
" already "
368 "running", MAC2STR(addr
));
373 wpa_printf(MSG_DEBUG
, "RSN: Starting IBSS Authenticator and "
374 "Supplicant for peer " MACSTR
, MAC2STR(addr
));
376 peer
= os_zalloc(sizeof(*peer
));
380 peer
->ibss_rsn
= ibss_rsn
;
381 os_memcpy(peer
->addr
, addr
, ETH_ALEN
);
383 if (ibss_rsn_supp_init(peer
, ibss_rsn
->wpa_s
->own_addr
, ibss_rsn
->psk
)
389 if (ibss_rsn_auth_init(ibss_rsn
, peer
) < 0) {
394 peer
->next
= ibss_rsn
->peers
;
395 ibss_rsn
->peers
= peer
;
401 struct ibss_rsn
* ibss_rsn_init(struct wpa_supplicant
*wpa_s
)
403 struct ibss_rsn
*ibss_rsn
;
405 ibss_rsn
= os_zalloc(sizeof(*ibss_rsn
));
406 if (ibss_rsn
== NULL
)
408 ibss_rsn
->wpa_s
= wpa_s
;
410 if (ibss_rsn_auth_init_group(ibss_rsn
, wpa_s
->own_addr
) < 0) {
411 ibss_rsn_deinit(ibss_rsn
);
419 void ibss_rsn_deinit(struct ibss_rsn
*ibss_rsn
)
421 struct ibss_rsn_peer
*peer
, *prev
;
423 if (ibss_rsn
== NULL
)
426 peer
= ibss_rsn
->peers
;
433 wpa_deinit(ibss_rsn
->auth_group
);
439 static int ibss_rsn_eapol_dst_supp(const u8
*buf
, size_t len
)
441 const struct ieee802_1x_hdr
*hdr
;
442 const struct wpa_eapol_key
*key
;
446 /* TODO: Support other EAPOL packets than just EAPOL-Key */
448 if (len
< sizeof(*hdr
) + sizeof(*key
))
451 hdr
= (const struct ieee802_1x_hdr
*) buf
;
452 key
= (const struct wpa_eapol_key
*) (hdr
+ 1);
453 plen
= be_to_host16(hdr
->length
);
455 if (hdr
->version
< EAPOL_VERSION
) {
456 /* TODO: backwards compatibility */
458 if (hdr
->type
!= IEEE802_1X_TYPE_EAPOL_KEY
) {
459 wpa_printf(MSG_DEBUG
, "RSN: EAPOL frame (type %u) discarded, "
460 "not a Key frame", hdr
->type
);
463 if (plen
> len
- sizeof(*hdr
) || plen
< sizeof(*key
)) {
464 wpa_printf(MSG_DEBUG
, "RSN: EAPOL frame payload size %lu "
465 "invalid (frame size %lu)",
466 (unsigned long) plen
, (unsigned long) len
);
470 if (key
->type
!= EAPOL_KEY_TYPE_RSN
) {
471 wpa_printf(MSG_DEBUG
, "RSN: EAPOL-Key type (%d) unknown, "
472 "discarded", key
->type
);
476 key_info
= WPA_GET_BE16(key
->key_info
);
478 return !!(key_info
& WPA_KEY_INFO_ACK
);
482 static int ibss_rsn_process_rx_eapol(struct ibss_rsn
*ibss_rsn
,
483 struct ibss_rsn_peer
*peer
,
484 const u8
*buf
, size_t len
)
489 supp
= ibss_rsn_eapol_dst_supp(buf
, len
);
493 tmp
= os_malloc(len
);
496 os_memcpy(tmp
, buf
, len
);
498 wpa_printf(MSG_DEBUG
, "RSN: IBSS RX EAPOL for Supplicant");
499 wpa_sm_rx_eapol(peer
->supp
, peer
->addr
, tmp
, len
);
501 wpa_printf(MSG_DEBUG
, "RSN: IBSS RX EAPOL for Authenticator");
502 wpa_receive(ibss_rsn
->auth_group
, peer
->auth
, tmp
, len
);
510 int ibss_rsn_rx_eapol(struct ibss_rsn
*ibss_rsn
, const u8
*src_addr
,
511 const u8
*buf
, size_t len
)
513 struct ibss_rsn_peer
*peer
;
515 for (peer
= ibss_rsn
->peers
; peer
; peer
= peer
->next
) {
516 if (os_memcmp(src_addr
, peer
->addr
, ETH_ALEN
) == 0)
517 return ibss_rsn_process_rx_eapol(ibss_rsn
, peer
,
521 if (ibss_rsn_eapol_dst_supp(buf
, len
) > 0) {
523 * Create new IBSS peer based on an EAPOL message from the peer
526 if (ibss_rsn_start(ibss_rsn
, src_addr
) < 0)
528 return ibss_rsn_process_rx_eapol(ibss_rsn
, ibss_rsn
->peers
,
536 void ibss_rsn_set_psk(struct ibss_rsn
*ibss_rsn
, const u8
*psk
)
538 os_memcpy(ibss_rsn
->psk
, psk
, PMK_LEN
);
542 void ibss_rsn_connected(struct ibss_rsn
*ibss_rsn
)
545 wpa_printf(MSG_DEBUG
, "RSN: IBSS connected notification");
546 if (ibss_rsn
->init_gtk_idx
) {
547 wpa_printf(MSG_DEBUG
, "RSN: Set initial IBSS TX GTK");
548 os_memset(seq
, 0, sizeof(seq
));
549 if (wpa_drv_set_key(ibss_rsn
->wpa_s
, WPA_ALG_CCMP
,
550 broadcast_ether_addr
,
551 ibss_rsn
->init_gtk_idx
,
552 1, seq
, sizeof(seq
), ibss_rsn
->init_gtk
,
554 wpa_printf(MSG_INFO
, "RSN: Failed to set IBSS TX GTK");
555 ibss_rsn
->init_gtk_idx
= 0;
556 os_memset(ibss_rsn
->init_gtk
, 0, sizeof(ibss_rsn
->init_gtk
));