1e28a4053SRui Paulo /*
2e28a4053SRui Paulo * wpa_supplicant - IBSS RSN
35b9c547cSRui Paulo * Copyright (c) 2009-2013, Jouni Malinen <j@w1.fi>
4e28a4053SRui Paulo *
5f05cddf9SRui Paulo * This software may be distributed under the terms of the BSD license.
6f05cddf9SRui Paulo * See README for more details.
7e28a4053SRui Paulo */
8e28a4053SRui Paulo
9e28a4053SRui Paulo #include "includes.h"
10e28a4053SRui Paulo
11e28a4053SRui Paulo #include "common.h"
125b9c547cSRui Paulo #include "common/wpa_ctrl.h"
135b9c547cSRui Paulo #include "utils/eloop.h"
14e28a4053SRui Paulo #include "l2_packet/l2_packet.h"
15e28a4053SRui Paulo #include "rsn_supp/wpa.h"
16e28a4053SRui Paulo #include "rsn_supp/wpa_ie.h"
17e28a4053SRui Paulo #include "ap/wpa_auth.h"
18e28a4053SRui Paulo #include "wpa_supplicant_i.h"
19e28a4053SRui Paulo #include "driver_i.h"
205b9c547cSRui Paulo #include "common/ieee802_11_defs.h"
21e28a4053SRui Paulo #include "ibss_rsn.h"
22e28a4053SRui Paulo
23e28a4053SRui Paulo
245b9c547cSRui Paulo static void ibss_rsn_auth_timeout(void *eloop_ctx, void *timeout_ctx);
255b9c547cSRui Paulo
265b9c547cSRui Paulo
ibss_rsn_get_peer(struct ibss_rsn * ibss_rsn,const u8 * addr)27f05cddf9SRui Paulo static struct ibss_rsn_peer * ibss_rsn_get_peer(struct ibss_rsn *ibss_rsn,
28f05cddf9SRui Paulo const u8 *addr)
29f05cddf9SRui Paulo {
30f05cddf9SRui Paulo struct ibss_rsn_peer *peer;
31f05cddf9SRui Paulo
32f05cddf9SRui Paulo for (peer = ibss_rsn->peers; peer; peer = peer->next)
33f05cddf9SRui Paulo if (os_memcmp(addr, peer->addr, ETH_ALEN) == 0)
34f05cddf9SRui Paulo break;
35f05cddf9SRui Paulo return peer;
36f05cddf9SRui Paulo }
37f05cddf9SRui Paulo
38f05cddf9SRui Paulo
ibss_rsn_free(struct ibss_rsn_peer * peer)39e28a4053SRui Paulo static void ibss_rsn_free(struct ibss_rsn_peer *peer)
40e28a4053SRui Paulo {
415b9c547cSRui Paulo eloop_cancel_timeout(ibss_rsn_auth_timeout, peer, NULL);
42e28a4053SRui Paulo wpa_auth_sta_deinit(peer->auth);
43e28a4053SRui Paulo wpa_sm_deinit(peer->supp);
44e28a4053SRui Paulo os_free(peer);
45e28a4053SRui Paulo }
46e28a4053SRui Paulo
47e28a4053SRui Paulo
supp_set_state(void * ctx,enum wpa_states state)48e28a4053SRui Paulo static void supp_set_state(void *ctx, enum wpa_states state)
49e28a4053SRui Paulo {
50e28a4053SRui Paulo struct ibss_rsn_peer *peer = ctx;
51e28a4053SRui Paulo peer->supp_state = state;
52e28a4053SRui Paulo }
53e28a4053SRui Paulo
54e28a4053SRui Paulo
supp_get_state(void * ctx)55f05cddf9SRui Paulo static enum wpa_states supp_get_state(void *ctx)
56f05cddf9SRui Paulo {
57f05cddf9SRui Paulo struct ibss_rsn_peer *peer = ctx;
58f05cddf9SRui Paulo return peer->supp_state;
59f05cddf9SRui Paulo }
60f05cddf9SRui Paulo
61f05cddf9SRui Paulo
supp_ether_send(void * ctx,const u8 * dest,u16 proto,const u8 * buf,size_t len)62e28a4053SRui Paulo static int supp_ether_send(void *ctx, const u8 *dest, u16 proto, const u8 *buf,
63e28a4053SRui Paulo size_t len)
64e28a4053SRui Paulo {
65e28a4053SRui Paulo struct ibss_rsn_peer *peer = ctx;
66e28a4053SRui Paulo struct wpa_supplicant *wpa_s = peer->ibss_rsn->wpa_s;
67*c1d255d3SCy Schubert int encrypt = peer->authentication_status & IBSS_RSN_REPORTED_PTK;
68e28a4053SRui Paulo
69*c1d255d3SCy Schubert wpa_printf(MSG_DEBUG, "SUPP: %s(dest=" MACSTR
70*c1d255d3SCy Schubert " proto=0x%04x len=%lu no_encrypt=%d)",
71*c1d255d3SCy Schubert __func__, MAC2STR(dest), proto, (unsigned long) len,
72*c1d255d3SCy Schubert !encrypt);
73*c1d255d3SCy Schubert
74*c1d255d3SCy Schubert if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_CONTROL_PORT)
75*c1d255d3SCy Schubert return wpa_drv_tx_control_port(wpa_s, dest, proto, buf, len,
76*c1d255d3SCy Schubert !encrypt);
77e28a4053SRui Paulo
78e28a4053SRui Paulo if (wpa_s->l2)
79e28a4053SRui Paulo return l2_packet_send(wpa_s->l2, dest, proto, buf, len);
80e28a4053SRui Paulo
815b9c547cSRui Paulo return -1;
82e28a4053SRui Paulo }
83e28a4053SRui Paulo
84e28a4053SRui Paulo
supp_alloc_eapol(void * ctx,u8 type,const void * data,u16 data_len,size_t * msg_len,void ** data_pos)85e28a4053SRui Paulo static u8 * supp_alloc_eapol(void *ctx, u8 type, const void *data,
86e28a4053SRui Paulo u16 data_len, size_t *msg_len, void **data_pos)
87e28a4053SRui Paulo {
88e28a4053SRui Paulo struct ieee802_1x_hdr *hdr;
89e28a4053SRui Paulo
90e28a4053SRui Paulo wpa_printf(MSG_DEBUG, "SUPP: %s(type=%d data_len=%d)",
91e28a4053SRui Paulo __func__, type, data_len);
92e28a4053SRui Paulo
93e28a4053SRui Paulo *msg_len = sizeof(*hdr) + data_len;
94e28a4053SRui Paulo hdr = os_malloc(*msg_len);
95e28a4053SRui Paulo if (hdr == NULL)
96e28a4053SRui Paulo return NULL;
97e28a4053SRui Paulo
98e28a4053SRui Paulo hdr->version = 2;
99e28a4053SRui Paulo hdr->type = type;
100e28a4053SRui Paulo hdr->length = host_to_be16(data_len);
101e28a4053SRui Paulo
102e28a4053SRui Paulo if (data)
103e28a4053SRui Paulo os_memcpy(hdr + 1, data, data_len);
104e28a4053SRui Paulo else
105e28a4053SRui Paulo os_memset(hdr + 1, 0, data_len);
106e28a4053SRui Paulo
107e28a4053SRui Paulo if (data_pos)
108e28a4053SRui Paulo *data_pos = hdr + 1;
109e28a4053SRui Paulo
110e28a4053SRui Paulo return (u8 *) hdr;
111e28a4053SRui Paulo }
112e28a4053SRui Paulo
113e28a4053SRui Paulo
supp_get_beacon_ie(void * ctx)114e28a4053SRui Paulo static int supp_get_beacon_ie(void *ctx)
115e28a4053SRui Paulo {
116e28a4053SRui Paulo struct ibss_rsn_peer *peer = ctx;
117e28a4053SRui Paulo
118e28a4053SRui Paulo wpa_printf(MSG_DEBUG, "SUPP: %s", __func__);
119e28a4053SRui Paulo /* TODO: get correct RSN IE */
120*c1d255d3SCy Schubert wpa_sm_set_ap_rsnxe(peer->supp, NULL, 0);
121e28a4053SRui Paulo return wpa_sm_set_ap_rsn_ie(peer->supp,
122e28a4053SRui Paulo (u8 *) "\x30\x14\x01\x00"
123e28a4053SRui Paulo "\x00\x0f\xac\x04"
124e28a4053SRui Paulo "\x01\x00\x00\x0f\xac\x04"
125e28a4053SRui Paulo "\x01\x00\x00\x0f\xac\x02"
126e28a4053SRui Paulo "\x00\x00", 22);
127e28a4053SRui Paulo }
128e28a4053SRui Paulo
129e28a4053SRui Paulo
ibss_check_rsn_completed(struct ibss_rsn_peer * peer)1305b9c547cSRui Paulo static void ibss_check_rsn_completed(struct ibss_rsn_peer *peer)
1315b9c547cSRui Paulo {
1325b9c547cSRui Paulo struct wpa_supplicant *wpa_s = peer->ibss_rsn->wpa_s;
1335b9c547cSRui Paulo
1345b9c547cSRui Paulo if ((peer->authentication_status &
1355b9c547cSRui Paulo (IBSS_RSN_SET_PTK_SUPP | IBSS_RSN_SET_PTK_AUTH)) !=
1365b9c547cSRui Paulo (IBSS_RSN_SET_PTK_SUPP | IBSS_RSN_SET_PTK_AUTH))
1375b9c547cSRui Paulo return;
1385b9c547cSRui Paulo if (peer->authentication_status & IBSS_RSN_REPORTED_PTK)
1395b9c547cSRui Paulo return;
1405b9c547cSRui Paulo peer->authentication_status |= IBSS_RSN_REPORTED_PTK;
1415b9c547cSRui Paulo wpa_msg(wpa_s, MSG_INFO, IBSS_RSN_COMPLETED MACSTR,
1425b9c547cSRui Paulo MAC2STR(peer->addr));
1435b9c547cSRui Paulo }
1445b9c547cSRui Paulo
1455b9c547cSRui Paulo
supp_set_key(void * ctx,enum wpa_alg alg,const u8 * addr,int key_idx,int set_tx,const u8 * seq,size_t seq_len,const u8 * key,size_t key_len,enum key_flag key_flag)146e28a4053SRui Paulo static int supp_set_key(void *ctx, enum wpa_alg alg,
147e28a4053SRui Paulo const u8 *addr, int key_idx, int set_tx,
148e28a4053SRui Paulo const u8 *seq, size_t seq_len,
149*c1d255d3SCy Schubert const u8 *key, size_t key_len, enum key_flag key_flag)
150e28a4053SRui Paulo {
151e28a4053SRui Paulo struct ibss_rsn_peer *peer = ctx;
152e28a4053SRui Paulo
153e28a4053SRui Paulo wpa_printf(MSG_DEBUG, "SUPP: %s(alg=%d addr=" MACSTR " key_idx=%d "
154e28a4053SRui Paulo "set_tx=%d)",
155e28a4053SRui Paulo __func__, alg, MAC2STR(addr), key_idx, set_tx);
156e28a4053SRui Paulo wpa_hexdump(MSG_DEBUG, "SUPP: set_key - seq", seq, seq_len);
157e28a4053SRui Paulo wpa_hexdump_key(MSG_DEBUG, "SUPP: set_key - key", key, key_len);
158e28a4053SRui Paulo
159e28a4053SRui Paulo if (key_idx == 0) {
1605b9c547cSRui Paulo peer->authentication_status |= IBSS_RSN_SET_PTK_SUPP;
1615b9c547cSRui Paulo ibss_check_rsn_completed(peer);
162e28a4053SRui Paulo /*
163e28a4053SRui Paulo * In IBSS RSN, the pairwise key from the 4-way handshake
164e28a4053SRui Paulo * initiated by the peer with highest MAC address is used.
165e28a4053SRui Paulo */
166e28a4053SRui Paulo if (os_memcmp(peer->ibss_rsn->wpa_s->own_addr, peer->addr,
167e28a4053SRui Paulo ETH_ALEN) > 0) {
168e28a4053SRui Paulo wpa_printf(MSG_DEBUG, "SUPP: Do not use this PTK");
169e28a4053SRui Paulo return 0;
170e28a4053SRui Paulo }
171e28a4053SRui Paulo }
172e28a4053SRui Paulo
173f05cddf9SRui Paulo if (is_broadcast_ether_addr(addr))
174f05cddf9SRui Paulo addr = peer->addr;
175e28a4053SRui Paulo return wpa_drv_set_key(peer->ibss_rsn->wpa_s, alg, addr, key_idx,
176*c1d255d3SCy Schubert set_tx, seq, seq_len, key, key_len, key_flag);
177e28a4053SRui Paulo }
178e28a4053SRui Paulo
179e28a4053SRui Paulo
supp_get_network_ctx(void * ctx)180e28a4053SRui Paulo static void * supp_get_network_ctx(void *ctx)
181e28a4053SRui Paulo {
182e28a4053SRui Paulo struct ibss_rsn_peer *peer = ctx;
183e28a4053SRui Paulo return wpa_supplicant_get_ssid(peer->ibss_rsn->wpa_s);
184e28a4053SRui Paulo }
185e28a4053SRui Paulo
186e28a4053SRui Paulo
supp_mlme_setprotection(void * ctx,const u8 * addr,int protection_type,int key_type)187e28a4053SRui Paulo static int supp_mlme_setprotection(void *ctx, const u8 *addr,
188e28a4053SRui Paulo int protection_type, int key_type)
189e28a4053SRui Paulo {
190e28a4053SRui Paulo wpa_printf(MSG_DEBUG, "SUPP: %s(addr=" MACSTR " protection_type=%d "
191e28a4053SRui Paulo "key_type=%d)",
192e28a4053SRui Paulo __func__, MAC2STR(addr), protection_type, key_type);
193e28a4053SRui Paulo return 0;
194e28a4053SRui Paulo }
195e28a4053SRui Paulo
196e28a4053SRui Paulo
supp_cancel_auth_timeout(void * ctx)197e28a4053SRui Paulo static void supp_cancel_auth_timeout(void *ctx)
198e28a4053SRui Paulo {
199e28a4053SRui Paulo wpa_printf(MSG_DEBUG, "SUPP: %s", __func__);
200e28a4053SRui Paulo }
201e28a4053SRui Paulo
202e28a4053SRui Paulo
supp_deauthenticate(void * ctx,u16 reason_code)203206b73d0SCy Schubert static void supp_deauthenticate(void *ctx, u16 reason_code)
204f05cddf9SRui Paulo {
205f05cddf9SRui Paulo wpa_printf(MSG_DEBUG, "SUPP: %s (TODO)", __func__);
206f05cddf9SRui Paulo }
207f05cddf9SRui Paulo
208f05cddf9SRui Paulo
supp_reconnect(void * ctx)209*c1d255d3SCy Schubert static void supp_reconnect(void *ctx)
210*c1d255d3SCy Schubert {
211*c1d255d3SCy Schubert wpa_printf(MSG_DEBUG, "SUPP: %s (TODO)", __func__);
212*c1d255d3SCy Schubert }
213*c1d255d3SCy Schubert
214*c1d255d3SCy Schubert
ibss_rsn_supp_init(struct ibss_rsn_peer * peer,const u8 * own_addr,const u8 * psk)215f05cddf9SRui Paulo static int ibss_rsn_supp_init(struct ibss_rsn_peer *peer, const u8 *own_addr,
216e28a4053SRui Paulo const u8 *psk)
217e28a4053SRui Paulo {
218e28a4053SRui Paulo struct wpa_sm_ctx *ctx = os_zalloc(sizeof(*ctx));
219e28a4053SRui Paulo if (ctx == NULL)
220e28a4053SRui Paulo return -1;
221e28a4053SRui Paulo
222e28a4053SRui Paulo ctx->ctx = peer;
223e28a4053SRui Paulo ctx->msg_ctx = peer->ibss_rsn->wpa_s;
224e28a4053SRui Paulo ctx->set_state = supp_set_state;
225f05cddf9SRui Paulo ctx->get_state = supp_get_state;
226e28a4053SRui Paulo ctx->ether_send = supp_ether_send;
227e28a4053SRui Paulo ctx->get_beacon_ie = supp_get_beacon_ie;
228e28a4053SRui Paulo ctx->alloc_eapol = supp_alloc_eapol;
229e28a4053SRui Paulo ctx->set_key = supp_set_key;
230e28a4053SRui Paulo ctx->get_network_ctx = supp_get_network_ctx;
231e28a4053SRui Paulo ctx->mlme_setprotection = supp_mlme_setprotection;
232e28a4053SRui Paulo ctx->cancel_auth_timeout = supp_cancel_auth_timeout;
233f05cddf9SRui Paulo ctx->deauthenticate = supp_deauthenticate;
234*c1d255d3SCy Schubert ctx->reconnect = supp_reconnect;
235e28a4053SRui Paulo peer->supp = wpa_sm_init(ctx);
236e28a4053SRui Paulo if (peer->supp == NULL) {
237e28a4053SRui Paulo wpa_printf(MSG_DEBUG, "SUPP: wpa_sm_init() failed");
238780fb4a2SCy Schubert os_free(ctx);
239e28a4053SRui Paulo return -1;
240e28a4053SRui Paulo }
241e28a4053SRui Paulo
242e28a4053SRui Paulo wpa_sm_set_own_addr(peer->supp, own_addr);
243e28a4053SRui Paulo wpa_sm_set_param(peer->supp, WPA_PARAM_RSN_ENABLED, 1);
244e28a4053SRui Paulo wpa_sm_set_param(peer->supp, WPA_PARAM_PROTO, WPA_PROTO_RSN);
245e28a4053SRui Paulo wpa_sm_set_param(peer->supp, WPA_PARAM_PAIRWISE, WPA_CIPHER_CCMP);
246e28a4053SRui Paulo wpa_sm_set_param(peer->supp, WPA_PARAM_GROUP, WPA_CIPHER_CCMP);
247e28a4053SRui Paulo wpa_sm_set_param(peer->supp, WPA_PARAM_KEY_MGMT, WPA_KEY_MGMT_PSK);
248780fb4a2SCy Schubert wpa_sm_set_pmk(peer->supp, psk, PMK_LEN, NULL, NULL);
249e28a4053SRui Paulo
250e28a4053SRui Paulo peer->supp_ie_len = sizeof(peer->supp_ie);
251e28a4053SRui Paulo if (wpa_sm_set_assoc_wpa_ie_default(peer->supp, peer->supp_ie,
252e28a4053SRui Paulo &peer->supp_ie_len) < 0) {
253e28a4053SRui Paulo wpa_printf(MSG_DEBUG, "SUPP: wpa_sm_set_assoc_wpa_ie_default()"
254e28a4053SRui Paulo " failed");
255e28a4053SRui Paulo return -1;
256e28a4053SRui Paulo }
257e28a4053SRui Paulo
258e28a4053SRui Paulo wpa_sm_notify_assoc(peer->supp, peer->addr);
259e28a4053SRui Paulo
260e28a4053SRui Paulo return 0;
261e28a4053SRui Paulo }
262e28a4053SRui Paulo
263e28a4053SRui Paulo
auth_logger(void * ctx,const u8 * addr,logger_level level,const char * txt)264e28a4053SRui Paulo static void auth_logger(void *ctx, const u8 *addr, logger_level level,
265e28a4053SRui Paulo const char *txt)
266e28a4053SRui Paulo {
267e28a4053SRui Paulo if (addr)
268e28a4053SRui Paulo wpa_printf(MSG_DEBUG, "AUTH: " MACSTR " - %s",
269e28a4053SRui Paulo MAC2STR(addr), txt);
270e28a4053SRui Paulo else
271e28a4053SRui Paulo wpa_printf(MSG_DEBUG, "AUTH: %s", txt);
272e28a4053SRui Paulo }
273e28a4053SRui Paulo
274e28a4053SRui Paulo
auth_get_psk(void * ctx,const u8 * addr,const u8 * p2p_dev_addr,const u8 * prev_psk,size_t * psk_len,int * vlan_id)2755b9c547cSRui Paulo static const u8 * auth_get_psk(void *ctx, const u8 *addr,
27685732ac8SCy Schubert const u8 *p2p_dev_addr, const u8 *prev_psk,
2774bc52338SCy Schubert size_t *psk_len, int *vlan_id)
278e28a4053SRui Paulo {
279e28a4053SRui Paulo struct ibss_rsn *ibss_rsn = ctx;
28085732ac8SCy Schubert
28185732ac8SCy Schubert if (psk_len)
28285732ac8SCy Schubert *psk_len = PMK_LEN;
2834bc52338SCy Schubert if (vlan_id)
2844bc52338SCy Schubert *vlan_id = 0;
285e28a4053SRui Paulo wpa_printf(MSG_DEBUG, "AUTH: %s (addr=" MACSTR " prev_psk=%p)",
286e28a4053SRui Paulo __func__, MAC2STR(addr), prev_psk);
287e28a4053SRui Paulo if (prev_psk)
288e28a4053SRui Paulo return NULL;
289e28a4053SRui Paulo return ibss_rsn->psk;
290e28a4053SRui Paulo }
291e28a4053SRui Paulo
292e28a4053SRui Paulo
auth_send_eapol(void * ctx,const u8 * addr,const u8 * data,size_t data_len,int encrypt)293e28a4053SRui Paulo static int auth_send_eapol(void *ctx, const u8 *addr, const u8 *data,
294e28a4053SRui Paulo size_t data_len, int encrypt)
295e28a4053SRui Paulo {
296e28a4053SRui Paulo struct ibss_rsn *ibss_rsn = ctx;
297e28a4053SRui Paulo struct wpa_supplicant *wpa_s = ibss_rsn->wpa_s;
298e28a4053SRui Paulo
299e28a4053SRui Paulo wpa_printf(MSG_DEBUG, "AUTH: %s(addr=" MACSTR " data_len=%lu "
300e28a4053SRui Paulo "encrypt=%d)",
301e28a4053SRui Paulo __func__, MAC2STR(addr), (unsigned long) data_len, encrypt);
302e28a4053SRui Paulo
303*c1d255d3SCy Schubert if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_CONTROL_PORT)
304*c1d255d3SCy Schubert return wpa_drv_tx_control_port(wpa_s, addr, ETH_P_EAPOL,
305*c1d255d3SCy Schubert data, data_len, !encrypt);
306*c1d255d3SCy Schubert
307e28a4053SRui Paulo if (wpa_s->l2)
308e28a4053SRui Paulo return l2_packet_send(wpa_s->l2, addr, ETH_P_EAPOL, data,
309e28a4053SRui Paulo data_len);
310e28a4053SRui Paulo
3115b9c547cSRui Paulo return -1;
312e28a4053SRui Paulo }
313e28a4053SRui Paulo
314e28a4053SRui Paulo
auth_set_key(void * ctx,int vlan_id,enum wpa_alg alg,const u8 * addr,int idx,u8 * key,size_t key_len,enum key_flag key_flag)315e28a4053SRui Paulo static int auth_set_key(void *ctx, int vlan_id, enum wpa_alg alg,
316*c1d255d3SCy Schubert const u8 *addr, int idx, u8 *key, size_t key_len,
317*c1d255d3SCy Schubert enum key_flag key_flag)
318e28a4053SRui Paulo {
319e28a4053SRui Paulo struct ibss_rsn *ibss_rsn = ctx;
320e28a4053SRui Paulo u8 seq[6];
321e28a4053SRui Paulo
322e28a4053SRui Paulo os_memset(seq, 0, sizeof(seq));
323e28a4053SRui Paulo
324e28a4053SRui Paulo if (addr) {
325e28a4053SRui Paulo wpa_printf(MSG_DEBUG, "AUTH: %s(alg=%d addr=" MACSTR
326e28a4053SRui Paulo " key_idx=%d)",
327e28a4053SRui Paulo __func__, alg, MAC2STR(addr), idx);
328e28a4053SRui Paulo } else {
329e28a4053SRui Paulo wpa_printf(MSG_DEBUG, "AUTH: %s(alg=%d key_idx=%d)",
330e28a4053SRui Paulo __func__, alg, idx);
331e28a4053SRui Paulo }
332e28a4053SRui Paulo wpa_hexdump_key(MSG_DEBUG, "AUTH: set_key - key", key, key_len);
333e28a4053SRui Paulo
334e28a4053SRui Paulo if (idx == 0) {
3355b9c547cSRui Paulo if (addr) {
3365b9c547cSRui Paulo struct ibss_rsn_peer *peer;
3375b9c547cSRui Paulo peer = ibss_rsn_get_peer(ibss_rsn, addr);
3385b9c547cSRui Paulo if (peer) {
3395b9c547cSRui Paulo peer->authentication_status |=
3405b9c547cSRui Paulo IBSS_RSN_SET_PTK_AUTH;
3415b9c547cSRui Paulo ibss_check_rsn_completed(peer);
3425b9c547cSRui Paulo }
3435b9c547cSRui Paulo }
344e28a4053SRui Paulo /*
345e28a4053SRui Paulo * In IBSS RSN, the pairwise key from the 4-way handshake
346e28a4053SRui Paulo * initiated by the peer with highest MAC address is used.
347e28a4053SRui Paulo */
348e28a4053SRui Paulo if (addr == NULL ||
349e28a4053SRui Paulo os_memcmp(ibss_rsn->wpa_s->own_addr, addr, ETH_ALEN) < 0) {
350e28a4053SRui Paulo wpa_printf(MSG_DEBUG, "AUTH: Do not use this PTK");
351e28a4053SRui Paulo return 0;
352e28a4053SRui Paulo }
353e28a4053SRui Paulo }
354e28a4053SRui Paulo
355e28a4053SRui Paulo return wpa_drv_set_key(ibss_rsn->wpa_s, alg, addr, idx,
356*c1d255d3SCy Schubert 1, seq, 6, key, key_len, key_flag);
357e28a4053SRui Paulo }
358e28a4053SRui Paulo
359e28a4053SRui Paulo
ibss_rsn_disconnect(void * ctx,const u8 * addr,u16 reason)3605b9c547cSRui Paulo static void ibss_rsn_disconnect(void *ctx, const u8 *addr, u16 reason)
3615b9c547cSRui Paulo {
3625b9c547cSRui Paulo struct ibss_rsn *ibss_rsn = ctx;
3635b9c547cSRui Paulo wpa_drv_sta_deauth(ibss_rsn->wpa_s, addr, reason);
3645b9c547cSRui Paulo }
3655b9c547cSRui Paulo
3665b9c547cSRui Paulo
auth_for_each_sta(void * ctx,int (* cb)(struct wpa_state_machine * sm,void * ctx),void * cb_ctx)367f05cddf9SRui Paulo static int auth_for_each_sta(void *ctx, int (*cb)(struct wpa_state_machine *sm,
368f05cddf9SRui Paulo void *ctx),
369f05cddf9SRui Paulo void *cb_ctx)
370f05cddf9SRui Paulo {
371f05cddf9SRui Paulo struct ibss_rsn *ibss_rsn = ctx;
372f05cddf9SRui Paulo struct ibss_rsn_peer *peer;
373f05cddf9SRui Paulo
374f05cddf9SRui Paulo wpa_printf(MSG_DEBUG, "AUTH: for_each_sta");
375f05cddf9SRui Paulo
376f05cddf9SRui Paulo for (peer = ibss_rsn->peers; peer; peer = peer->next) {
377f05cddf9SRui Paulo if (peer->auth && cb(peer->auth, cb_ctx))
378f05cddf9SRui Paulo return 1;
379f05cddf9SRui Paulo }
380f05cddf9SRui Paulo
381f05cddf9SRui Paulo return 0;
382f05cddf9SRui Paulo }
383f05cddf9SRui Paulo
384f05cddf9SRui Paulo
ibss_set_sta_authorized(struct ibss_rsn * ibss_rsn,struct ibss_rsn_peer * peer,int authorized)385f05cddf9SRui Paulo static void ibss_set_sta_authorized(struct ibss_rsn *ibss_rsn,
386f05cddf9SRui Paulo struct ibss_rsn_peer *peer, int authorized)
387f05cddf9SRui Paulo {
388f05cddf9SRui Paulo int res;
389f05cddf9SRui Paulo
390f05cddf9SRui Paulo if (authorized) {
391f05cddf9SRui Paulo res = wpa_drv_sta_set_flags(ibss_rsn->wpa_s, peer->addr,
392f05cddf9SRui Paulo WPA_STA_AUTHORIZED,
393f05cddf9SRui Paulo WPA_STA_AUTHORIZED, ~0);
394f05cddf9SRui Paulo wpa_printf(MSG_DEBUG, "AUTH: " MACSTR " authorizing port",
395f05cddf9SRui Paulo MAC2STR(peer->addr));
396f05cddf9SRui Paulo } else {
397f05cddf9SRui Paulo res = wpa_drv_sta_set_flags(ibss_rsn->wpa_s, peer->addr,
398f05cddf9SRui Paulo 0, 0, ~WPA_STA_AUTHORIZED);
399f05cddf9SRui Paulo wpa_printf(MSG_DEBUG, "AUTH: " MACSTR " unauthorizing port",
400f05cddf9SRui Paulo MAC2STR(peer->addr));
401f05cddf9SRui Paulo }
402f05cddf9SRui Paulo
403f05cddf9SRui Paulo if (res && errno != ENOENT) {
404f05cddf9SRui Paulo wpa_printf(MSG_DEBUG, "Could not set station " MACSTR " flags "
405f05cddf9SRui Paulo "for kernel driver (errno=%d)",
406f05cddf9SRui Paulo MAC2STR(peer->addr), errno);
407f05cddf9SRui Paulo }
408f05cddf9SRui Paulo }
409f05cddf9SRui Paulo
410f05cddf9SRui Paulo
auth_set_eapol(void * ctx,const u8 * addr,wpa_eapol_variable var,int value)411f05cddf9SRui Paulo static void auth_set_eapol(void *ctx, const u8 *addr,
412f05cddf9SRui Paulo wpa_eapol_variable var, int value)
413f05cddf9SRui Paulo {
414f05cddf9SRui Paulo struct ibss_rsn *ibss_rsn = ctx;
415f05cddf9SRui Paulo struct ibss_rsn_peer *peer = ibss_rsn_get_peer(ibss_rsn, addr);
416f05cddf9SRui Paulo
417f05cddf9SRui Paulo if (peer == NULL)
418f05cddf9SRui Paulo return;
419f05cddf9SRui Paulo
420f05cddf9SRui Paulo switch (var) {
421f05cddf9SRui Paulo case WPA_EAPOL_authorized:
422f05cddf9SRui Paulo ibss_set_sta_authorized(ibss_rsn, peer, value);
423f05cddf9SRui Paulo break;
424f05cddf9SRui Paulo default:
425f05cddf9SRui Paulo /* do not handle any other event */
426f05cddf9SRui Paulo wpa_printf(MSG_DEBUG, "AUTH: eapol event not handled %d", var);
427f05cddf9SRui Paulo break;
428f05cddf9SRui Paulo }
429f05cddf9SRui Paulo }
430f05cddf9SRui Paulo
431f05cddf9SRui Paulo
ibss_rsn_auth_init_group(struct ibss_rsn * ibss_rsn,const u8 * own_addr,struct wpa_ssid * ssid)432e28a4053SRui Paulo static int ibss_rsn_auth_init_group(struct ibss_rsn *ibss_rsn,
433780fb4a2SCy Schubert const u8 *own_addr, struct wpa_ssid *ssid)
434e28a4053SRui Paulo {
435e28a4053SRui Paulo struct wpa_auth_config conf;
43685732ac8SCy Schubert static const struct wpa_auth_callbacks cb = {
43785732ac8SCy Schubert .logger = auth_logger,
43885732ac8SCy Schubert .set_eapol = auth_set_eapol,
43985732ac8SCy Schubert .send_eapol = auth_send_eapol,
44085732ac8SCy Schubert .get_psk = auth_get_psk,
44185732ac8SCy Schubert .set_key = auth_set_key,
44285732ac8SCy Schubert .for_each_sta = auth_for_each_sta,
44385732ac8SCy Schubert .disconnect = ibss_rsn_disconnect,
44485732ac8SCy Schubert };
445e28a4053SRui Paulo
446e28a4053SRui Paulo wpa_printf(MSG_DEBUG, "AUTH: Initializing group state machine");
447e28a4053SRui Paulo
448e28a4053SRui Paulo os_memset(&conf, 0, sizeof(conf));
449e28a4053SRui Paulo conf.wpa = 2;
450e28a4053SRui Paulo conf.wpa_key_mgmt = WPA_KEY_MGMT_PSK;
451e28a4053SRui Paulo conf.wpa_pairwise = WPA_CIPHER_CCMP;
452e28a4053SRui Paulo conf.rsn_pairwise = WPA_CIPHER_CCMP;
453e28a4053SRui Paulo conf.wpa_group = WPA_CIPHER_CCMP;
454e28a4053SRui Paulo conf.eapol_version = 2;
455780fb4a2SCy Schubert conf.wpa_group_rekey = ssid->group_rekey ? ssid->group_rekey : 600;
45685732ac8SCy Schubert conf.wpa_group_update_count = 4;
45785732ac8SCy Schubert conf.wpa_pairwise_update_count = 4;
458e28a4053SRui Paulo
45985732ac8SCy Schubert ibss_rsn->auth_group = wpa_init(own_addr, &conf, &cb, ibss_rsn);
460e28a4053SRui Paulo if (ibss_rsn->auth_group == NULL) {
461e28a4053SRui Paulo wpa_printf(MSG_DEBUG, "AUTH: wpa_init() failed");
462e28a4053SRui Paulo return -1;
463e28a4053SRui Paulo }
464e28a4053SRui Paulo
465f05cddf9SRui Paulo wpa_init_keys(ibss_rsn->auth_group);
466f05cddf9SRui Paulo
467e28a4053SRui Paulo return 0;
468e28a4053SRui Paulo }
469e28a4053SRui Paulo
470e28a4053SRui Paulo
ibss_rsn_auth_init(struct ibss_rsn * ibss_rsn,struct ibss_rsn_peer * peer)471e28a4053SRui Paulo static int ibss_rsn_auth_init(struct ibss_rsn *ibss_rsn,
472e28a4053SRui Paulo struct ibss_rsn_peer *peer)
473e28a4053SRui Paulo {
4745b9c547cSRui Paulo peer->auth = wpa_auth_sta_init(ibss_rsn->auth_group, peer->addr, NULL);
475e28a4053SRui Paulo if (peer->auth == NULL) {
476e28a4053SRui Paulo wpa_printf(MSG_DEBUG, "AUTH: wpa_auth_sta_init() failed");
477e28a4053SRui Paulo return -1;
478e28a4053SRui Paulo }
479e28a4053SRui Paulo
480e28a4053SRui Paulo /* TODO: get peer RSN IE with Probe Request */
4814bc52338SCy Schubert if (wpa_validate_wpa_ie(ibss_rsn->auth_group, peer->auth, 0,
482e28a4053SRui Paulo (u8 *) "\x30\x14\x01\x00"
483e28a4053SRui Paulo "\x00\x0f\xac\x04"
484e28a4053SRui Paulo "\x01\x00\x00\x0f\xac\x04"
485e28a4053SRui Paulo "\x01\x00\x00\x0f\xac\x02"
486*c1d255d3SCy Schubert "\x00\x00", 22, NULL, 0, NULL, 0, NULL, 0) !=
487e28a4053SRui Paulo WPA_IE_OK) {
488e28a4053SRui Paulo wpa_printf(MSG_DEBUG, "AUTH: wpa_validate_wpa_ie() failed");
489e28a4053SRui Paulo return -1;
490e28a4053SRui Paulo }
491e28a4053SRui Paulo
492e28a4053SRui Paulo if (wpa_auth_sm_event(peer->auth, WPA_ASSOC))
493e28a4053SRui Paulo return -1;
494e28a4053SRui Paulo
495e28a4053SRui Paulo if (wpa_auth_sta_associated(ibss_rsn->auth_group, peer->auth))
496e28a4053SRui Paulo return -1;
497e28a4053SRui Paulo
498e28a4053SRui Paulo return 0;
499e28a4053SRui Paulo }
500e28a4053SRui Paulo
501e28a4053SRui Paulo
ibss_rsn_send_auth(struct ibss_rsn * ibss_rsn,const u8 * da,int seq)5025b9c547cSRui Paulo static int ibss_rsn_send_auth(struct ibss_rsn *ibss_rsn, const u8 *da, int seq)
503e28a4053SRui Paulo {
5045b9c547cSRui Paulo struct ieee80211_mgmt auth;
5055b9c547cSRui Paulo const size_t auth_length = IEEE80211_HDRLEN + sizeof(auth.u.auth);
5065b9c547cSRui Paulo struct wpa_supplicant *wpa_s = ibss_rsn->wpa_s;
507e28a4053SRui Paulo
5085b9c547cSRui Paulo os_memset(&auth, 0, sizeof(auth));
5095b9c547cSRui Paulo
5105b9c547cSRui Paulo auth.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
5115b9c547cSRui Paulo WLAN_FC_STYPE_AUTH);
5125b9c547cSRui Paulo os_memcpy(auth.da, da, ETH_ALEN);
5135b9c547cSRui Paulo os_memcpy(auth.sa, wpa_s->own_addr, ETH_ALEN);
5145b9c547cSRui Paulo os_memcpy(auth.bssid, wpa_s->bssid, ETH_ALEN);
5155b9c547cSRui Paulo
5165b9c547cSRui Paulo auth.u.auth.auth_alg = host_to_le16(WLAN_AUTH_OPEN);
5175b9c547cSRui Paulo auth.u.auth.auth_transaction = host_to_le16(seq);
5185b9c547cSRui Paulo auth.u.auth.status_code = host_to_le16(WLAN_STATUS_SUCCESS);
5195b9c547cSRui Paulo
5205b9c547cSRui Paulo wpa_printf(MSG_DEBUG, "RSN: IBSS TX Auth frame (SEQ %d) to " MACSTR,
5215b9c547cSRui Paulo seq, MAC2STR(da));
5225b9c547cSRui Paulo
523*c1d255d3SCy Schubert return wpa_drv_send_mlme(wpa_s, (u8 *) &auth, auth_length, 0, 0, 0);
524f05cddf9SRui Paulo }
525f05cddf9SRui Paulo
5265b9c547cSRui Paulo
ibss_rsn_is_auth_started(struct ibss_rsn_peer * peer)5275b9c547cSRui Paulo static int ibss_rsn_is_auth_started(struct ibss_rsn_peer * peer)
5285b9c547cSRui Paulo {
5295b9c547cSRui Paulo return peer->authentication_status &
5305b9c547cSRui Paulo (IBSS_RSN_AUTH_BY_US | IBSS_RSN_AUTH_EAPOL_BY_US);
5315b9c547cSRui Paulo }
5325b9c547cSRui Paulo
5335b9c547cSRui Paulo
5345b9c547cSRui Paulo static struct ibss_rsn_peer *
ibss_rsn_peer_init(struct ibss_rsn * ibss_rsn,const u8 * addr)5355b9c547cSRui Paulo ibss_rsn_peer_init(struct ibss_rsn *ibss_rsn, const u8 *addr)
5365b9c547cSRui Paulo {
5375b9c547cSRui Paulo struct ibss_rsn_peer *peer;
5385b9c547cSRui Paulo if (ibss_rsn == NULL)
5395b9c547cSRui Paulo return NULL;
5405b9c547cSRui Paulo
5415b9c547cSRui Paulo peer = ibss_rsn_get_peer(ibss_rsn, addr);
5425b9c547cSRui Paulo if (peer) {
5435b9c547cSRui Paulo wpa_printf(MSG_DEBUG, "RSN: IBSS Supplicant for peer "MACSTR
5445b9c547cSRui Paulo " already running", MAC2STR(addr));
5455b9c547cSRui Paulo return peer;
5465b9c547cSRui Paulo }
5475b9c547cSRui Paulo
5485b9c547cSRui Paulo wpa_printf(MSG_DEBUG, "RSN: Starting IBSS Supplicant for peer "MACSTR,
5495b9c547cSRui Paulo MAC2STR(addr));
550e28a4053SRui Paulo
551e28a4053SRui Paulo peer = os_zalloc(sizeof(*peer));
5525b9c547cSRui Paulo if (peer == NULL) {
5535b9c547cSRui Paulo wpa_printf(MSG_DEBUG, "RSN: Could not allocate memory.");
5545b9c547cSRui Paulo return NULL;
5555b9c547cSRui Paulo }
556e28a4053SRui Paulo
557e28a4053SRui Paulo peer->ibss_rsn = ibss_rsn;
558e28a4053SRui Paulo os_memcpy(peer->addr, addr, ETH_ALEN);
5595b9c547cSRui Paulo peer->authentication_status = IBSS_RSN_AUTH_NOT_AUTHENTICATED;
560e28a4053SRui Paulo
5615b9c547cSRui Paulo if (ibss_rsn_supp_init(peer, ibss_rsn->wpa_s->own_addr,
5625b9c547cSRui Paulo ibss_rsn->psk) < 0) {
563e28a4053SRui Paulo ibss_rsn_free(peer);
5645b9c547cSRui Paulo return NULL;
565e28a4053SRui Paulo }
566e28a4053SRui Paulo
567e28a4053SRui Paulo peer->next = ibss_rsn->peers;
568e28a4053SRui Paulo ibss_rsn->peers = peer;
569e28a4053SRui Paulo
5705b9c547cSRui Paulo return peer;
5715b9c547cSRui Paulo }
5725b9c547cSRui Paulo
5735b9c547cSRui Paulo
ibss_rsn_auth_timeout(void * eloop_ctx,void * timeout_ctx)5745b9c547cSRui Paulo static void ibss_rsn_auth_timeout(void *eloop_ctx, void *timeout_ctx)
5755b9c547cSRui Paulo {
5765b9c547cSRui Paulo struct ibss_rsn_peer *peer = eloop_ctx;
5775b9c547cSRui Paulo
5785b9c547cSRui Paulo /*
5795b9c547cSRui Paulo * Assume peer does not support Authentication exchange or the frame was
5805b9c547cSRui Paulo * lost somewhere - start EAPOL Authenticator.
5815b9c547cSRui Paulo */
5825b9c547cSRui Paulo wpa_printf(MSG_DEBUG,
5835b9c547cSRui Paulo "RSN: Timeout on waiting Authentication frame response from "
5845b9c547cSRui Paulo MACSTR " - start authenticator", MAC2STR(peer->addr));
5855b9c547cSRui Paulo
5865b9c547cSRui Paulo peer->authentication_status |= IBSS_RSN_AUTH_BY_US;
5875b9c547cSRui Paulo ibss_rsn_auth_init(peer->ibss_rsn, peer);
5885b9c547cSRui Paulo }
5895b9c547cSRui Paulo
5905b9c547cSRui Paulo
ibss_rsn_start(struct ibss_rsn * ibss_rsn,const u8 * addr)5915b9c547cSRui Paulo int ibss_rsn_start(struct ibss_rsn *ibss_rsn, const u8 *addr)
5925b9c547cSRui Paulo {
5935b9c547cSRui Paulo struct ibss_rsn_peer *peer;
5945b9c547cSRui Paulo int res;
5955b9c547cSRui Paulo
596325151a3SRui Paulo if (!ibss_rsn)
597325151a3SRui Paulo return -1;
598325151a3SRui Paulo
5995b9c547cSRui Paulo /* if the peer already exists, exit immediately */
6005b9c547cSRui Paulo peer = ibss_rsn_get_peer(ibss_rsn, addr);
6015b9c547cSRui Paulo if (peer)
602e28a4053SRui Paulo return 0;
6035b9c547cSRui Paulo
6045b9c547cSRui Paulo peer = ibss_rsn_peer_init(ibss_rsn, addr);
6055b9c547cSRui Paulo if (peer == NULL)
6065b9c547cSRui Paulo return -1;
6075b9c547cSRui Paulo
6085b9c547cSRui Paulo /* Open Authentication: send first Authentication frame */
6095b9c547cSRui Paulo res = ibss_rsn_send_auth(ibss_rsn, addr, 1);
6105b9c547cSRui Paulo if (res) {
6115b9c547cSRui Paulo /*
6125b9c547cSRui Paulo * The driver may not support Authentication frame exchange in
6135b9c547cSRui Paulo * IBSS. Ignore authentication and go through EAPOL exchange.
6145b9c547cSRui Paulo */
6155b9c547cSRui Paulo peer->authentication_status |= IBSS_RSN_AUTH_BY_US;
6165b9c547cSRui Paulo return ibss_rsn_auth_init(ibss_rsn, peer);
6175b9c547cSRui Paulo } else {
6185b9c547cSRui Paulo os_get_reltime(&peer->own_auth_tx);
6195b9c547cSRui Paulo eloop_register_timeout(1, 0, ibss_rsn_auth_timeout, peer, NULL);
6205b9c547cSRui Paulo }
6215b9c547cSRui Paulo
6225b9c547cSRui Paulo return 0;
6235b9c547cSRui Paulo }
6245b9c547cSRui Paulo
6255b9c547cSRui Paulo
ibss_rsn_peer_authenticated(struct ibss_rsn * ibss_rsn,struct ibss_rsn_peer * peer,int reason)6265b9c547cSRui Paulo static int ibss_rsn_peer_authenticated(struct ibss_rsn *ibss_rsn,
6275b9c547cSRui Paulo struct ibss_rsn_peer *peer, int reason)
6285b9c547cSRui Paulo {
6295b9c547cSRui Paulo int already_started;
6305b9c547cSRui Paulo
6315b9c547cSRui Paulo if (ibss_rsn == NULL || peer == NULL)
6325b9c547cSRui Paulo return -1;
6335b9c547cSRui Paulo
6345b9c547cSRui Paulo already_started = ibss_rsn_is_auth_started(peer);
6355b9c547cSRui Paulo peer->authentication_status |= reason;
6365b9c547cSRui Paulo
6375b9c547cSRui Paulo if (already_started) {
6385b9c547cSRui Paulo wpa_printf(MSG_DEBUG, "RSN: IBSS Authenticator already "
6395b9c547cSRui Paulo "started for peer " MACSTR, MAC2STR(peer->addr));
6405b9c547cSRui Paulo return 0;
6415b9c547cSRui Paulo }
6425b9c547cSRui Paulo
6435b9c547cSRui Paulo wpa_printf(MSG_DEBUG, "RSN: Starting IBSS Authenticator "
6445b9c547cSRui Paulo "for now-authenticated peer " MACSTR, MAC2STR(peer->addr));
6455b9c547cSRui Paulo
6465b9c547cSRui Paulo return ibss_rsn_auth_init(ibss_rsn, peer);
647e28a4053SRui Paulo }
648e28a4053SRui Paulo
649e28a4053SRui Paulo
ibss_rsn_stop(struct ibss_rsn * ibss_rsn,const u8 * peermac)650f05cddf9SRui Paulo void ibss_rsn_stop(struct ibss_rsn *ibss_rsn, const u8 *peermac)
651f05cddf9SRui Paulo {
652f05cddf9SRui Paulo struct ibss_rsn_peer *peer, *prev;
653f05cddf9SRui Paulo
654f05cddf9SRui Paulo if (ibss_rsn == NULL)
655f05cddf9SRui Paulo return;
656f05cddf9SRui Paulo
657f05cddf9SRui Paulo if (peermac == NULL) {
658f05cddf9SRui Paulo /* remove all peers */
659f05cddf9SRui Paulo wpa_printf(MSG_DEBUG, "%s: Remove all peers", __func__);
660f05cddf9SRui Paulo peer = ibss_rsn->peers;
661f05cddf9SRui Paulo while (peer) {
662f05cddf9SRui Paulo prev = peer;
663f05cddf9SRui Paulo peer = peer->next;
664f05cddf9SRui Paulo ibss_rsn_free(prev);
665f05cddf9SRui Paulo ibss_rsn->peers = peer;
666f05cddf9SRui Paulo }
667f05cddf9SRui Paulo } else {
668f05cddf9SRui Paulo /* remove specific peer */
669f05cddf9SRui Paulo wpa_printf(MSG_DEBUG, "%s: Remove specific peer " MACSTR,
670f05cddf9SRui Paulo __func__, MAC2STR(peermac));
671f05cddf9SRui Paulo
672f05cddf9SRui Paulo for (prev = NULL, peer = ibss_rsn->peers; peer != NULL;
673f05cddf9SRui Paulo prev = peer, peer = peer->next) {
674f05cddf9SRui Paulo if (os_memcmp(peermac, peer->addr, ETH_ALEN) == 0) {
675f05cddf9SRui Paulo if (prev == NULL)
676f05cddf9SRui Paulo ibss_rsn->peers = peer->next;
677f05cddf9SRui Paulo else
678f05cddf9SRui Paulo prev->next = peer->next;
679f05cddf9SRui Paulo ibss_rsn_free(peer);
680f05cddf9SRui Paulo wpa_printf(MSG_DEBUG, "%s: Successfully "
681f05cddf9SRui Paulo "removed a specific peer",
682f05cddf9SRui Paulo __func__);
683f05cddf9SRui Paulo break;
684f05cddf9SRui Paulo }
685f05cddf9SRui Paulo }
686f05cddf9SRui Paulo }
687f05cddf9SRui Paulo }
688f05cddf9SRui Paulo
689f05cddf9SRui Paulo
ibss_rsn_init(struct wpa_supplicant * wpa_s,struct wpa_ssid * ssid)690780fb4a2SCy Schubert struct ibss_rsn * ibss_rsn_init(struct wpa_supplicant *wpa_s,
691780fb4a2SCy Schubert struct wpa_ssid *ssid)
692e28a4053SRui Paulo {
693e28a4053SRui Paulo struct ibss_rsn *ibss_rsn;
694e28a4053SRui Paulo
695e28a4053SRui Paulo ibss_rsn = os_zalloc(sizeof(*ibss_rsn));
696e28a4053SRui Paulo if (ibss_rsn == NULL)
697e28a4053SRui Paulo return NULL;
698e28a4053SRui Paulo ibss_rsn->wpa_s = wpa_s;
699e28a4053SRui Paulo
700780fb4a2SCy Schubert if (ibss_rsn_auth_init_group(ibss_rsn, wpa_s->own_addr, ssid) < 0) {
701e28a4053SRui Paulo ibss_rsn_deinit(ibss_rsn);
702e28a4053SRui Paulo return NULL;
703e28a4053SRui Paulo }
704e28a4053SRui Paulo
705e28a4053SRui Paulo return ibss_rsn;
706e28a4053SRui Paulo }
707e28a4053SRui Paulo
708e28a4053SRui Paulo
ibss_rsn_deinit(struct ibss_rsn * ibss_rsn)709e28a4053SRui Paulo void ibss_rsn_deinit(struct ibss_rsn *ibss_rsn)
710e28a4053SRui Paulo {
711e28a4053SRui Paulo struct ibss_rsn_peer *peer, *prev;
712e28a4053SRui Paulo
713e28a4053SRui Paulo if (ibss_rsn == NULL)
714e28a4053SRui Paulo return;
715e28a4053SRui Paulo
716e28a4053SRui Paulo peer = ibss_rsn->peers;
717e28a4053SRui Paulo while (peer) {
718e28a4053SRui Paulo prev = peer;
719e28a4053SRui Paulo peer = peer->next;
720e28a4053SRui Paulo ibss_rsn_free(prev);
721e28a4053SRui Paulo }
722e28a4053SRui Paulo
723325151a3SRui Paulo if (ibss_rsn->auth_group)
724e28a4053SRui Paulo wpa_deinit(ibss_rsn->auth_group);
725e28a4053SRui Paulo os_free(ibss_rsn);
726e28a4053SRui Paulo
727e28a4053SRui Paulo }
728e28a4053SRui Paulo
729e28a4053SRui Paulo
ibss_rsn_eapol_dst_supp(const u8 * buf,size_t len)730e28a4053SRui Paulo static int ibss_rsn_eapol_dst_supp(const u8 *buf, size_t len)
731e28a4053SRui Paulo {
732e28a4053SRui Paulo const struct ieee802_1x_hdr *hdr;
733e28a4053SRui Paulo const struct wpa_eapol_key *key;
734e28a4053SRui Paulo u16 key_info;
735e28a4053SRui Paulo size_t plen;
736e28a4053SRui Paulo
737e28a4053SRui Paulo /* TODO: Support other EAPOL packets than just EAPOL-Key */
738e28a4053SRui Paulo
739e28a4053SRui Paulo if (len < sizeof(*hdr) + sizeof(*key))
740e28a4053SRui Paulo return -1;
741e28a4053SRui Paulo
742e28a4053SRui Paulo hdr = (const struct ieee802_1x_hdr *) buf;
743e28a4053SRui Paulo key = (const struct wpa_eapol_key *) (hdr + 1);
744e28a4053SRui Paulo plen = be_to_host16(hdr->length);
745e28a4053SRui Paulo
746e28a4053SRui Paulo if (hdr->version < EAPOL_VERSION) {
747e28a4053SRui Paulo /* TODO: backwards compatibility */
748e28a4053SRui Paulo }
749e28a4053SRui Paulo if (hdr->type != IEEE802_1X_TYPE_EAPOL_KEY) {
750e28a4053SRui Paulo wpa_printf(MSG_DEBUG, "RSN: EAPOL frame (type %u) discarded, "
751e28a4053SRui Paulo "not a Key frame", hdr->type);
752e28a4053SRui Paulo return -1;
753e28a4053SRui Paulo }
754e28a4053SRui Paulo if (plen > len - sizeof(*hdr) || plen < sizeof(*key)) {
755e28a4053SRui Paulo wpa_printf(MSG_DEBUG, "RSN: EAPOL frame payload size %lu "
756e28a4053SRui Paulo "invalid (frame size %lu)",
757e28a4053SRui Paulo (unsigned long) plen, (unsigned long) len);
758e28a4053SRui Paulo return -1;
759e28a4053SRui Paulo }
760e28a4053SRui Paulo
761e28a4053SRui Paulo if (key->type != EAPOL_KEY_TYPE_RSN) {
762e28a4053SRui Paulo wpa_printf(MSG_DEBUG, "RSN: EAPOL-Key type (%d) unknown, "
763e28a4053SRui Paulo "discarded", key->type);
764e28a4053SRui Paulo return -1;
765e28a4053SRui Paulo }
766e28a4053SRui Paulo
767e28a4053SRui Paulo key_info = WPA_GET_BE16(key->key_info);
768e28a4053SRui Paulo
769e28a4053SRui Paulo return !!(key_info & WPA_KEY_INFO_ACK);
770e28a4053SRui Paulo }
771e28a4053SRui Paulo
772e28a4053SRui Paulo
ibss_rsn_process_rx_eapol(struct ibss_rsn * ibss_rsn,struct ibss_rsn_peer * peer,const u8 * buf,size_t len)773e28a4053SRui Paulo static int ibss_rsn_process_rx_eapol(struct ibss_rsn *ibss_rsn,
774e28a4053SRui Paulo struct ibss_rsn_peer *peer,
775e28a4053SRui Paulo const u8 *buf, size_t len)
776e28a4053SRui Paulo {
777e28a4053SRui Paulo int supp;
778e28a4053SRui Paulo u8 *tmp;
779e28a4053SRui Paulo
780e28a4053SRui Paulo supp = ibss_rsn_eapol_dst_supp(buf, len);
781e28a4053SRui Paulo if (supp < 0)
782e28a4053SRui Paulo return -1;
783e28a4053SRui Paulo
78485732ac8SCy Schubert tmp = os_memdup(buf, len);
785e28a4053SRui Paulo if (tmp == NULL)
786e28a4053SRui Paulo return -1;
787e28a4053SRui Paulo if (supp) {
7885b9c547cSRui Paulo peer->authentication_status |= IBSS_RSN_AUTH_EAPOL_BY_PEER;
7895b9c547cSRui Paulo wpa_printf(MSG_DEBUG, "RSN: IBSS RX EAPOL for Supplicant from "
7905b9c547cSRui Paulo MACSTR, MAC2STR(peer->addr));
791e28a4053SRui Paulo wpa_sm_rx_eapol(peer->supp, peer->addr, tmp, len);
792e28a4053SRui Paulo } else {
7935b9c547cSRui Paulo if (ibss_rsn_is_auth_started(peer) == 0) {
7945b9c547cSRui Paulo wpa_printf(MSG_DEBUG, "RSN: IBSS EAPOL for "
7955b9c547cSRui Paulo "Authenticator dropped as " MACSTR " is not "
7965b9c547cSRui Paulo "authenticated", MAC2STR(peer->addr));
7975b9c547cSRui Paulo os_free(tmp);
7985b9c547cSRui Paulo return -1;
7995b9c547cSRui Paulo }
8005b9c547cSRui Paulo
8015b9c547cSRui Paulo wpa_printf(MSG_DEBUG, "RSN: IBSS RX EAPOL for Authenticator "
8025b9c547cSRui Paulo "from "MACSTR, MAC2STR(peer->addr));
803e28a4053SRui Paulo wpa_receive(ibss_rsn->auth_group, peer->auth, tmp, len);
804e28a4053SRui Paulo }
805e28a4053SRui Paulo os_free(tmp);
806e28a4053SRui Paulo
807e28a4053SRui Paulo return 1;
808e28a4053SRui Paulo }
809e28a4053SRui Paulo
810e28a4053SRui Paulo
ibss_rsn_rx_eapol(struct ibss_rsn * ibss_rsn,const u8 * src_addr,const u8 * buf,size_t len)811e28a4053SRui Paulo int ibss_rsn_rx_eapol(struct ibss_rsn *ibss_rsn, const u8 *src_addr,
812e28a4053SRui Paulo const u8 *buf, size_t len)
813e28a4053SRui Paulo {
814e28a4053SRui Paulo struct ibss_rsn_peer *peer;
815e28a4053SRui Paulo
816f05cddf9SRui Paulo if (ibss_rsn == NULL)
817f05cddf9SRui Paulo return -1;
818f05cddf9SRui Paulo
819f05cddf9SRui Paulo peer = ibss_rsn_get_peer(ibss_rsn, src_addr);
820f05cddf9SRui Paulo if (peer)
821f05cddf9SRui Paulo return ibss_rsn_process_rx_eapol(ibss_rsn, peer, buf, len);
822e28a4053SRui Paulo
823e28a4053SRui Paulo if (ibss_rsn_eapol_dst_supp(buf, len) > 0) {
824e28a4053SRui Paulo /*
825e28a4053SRui Paulo * Create new IBSS peer based on an EAPOL message from the peer
826e28a4053SRui Paulo * Authenticator.
827e28a4053SRui Paulo */
8285b9c547cSRui Paulo peer = ibss_rsn_peer_init(ibss_rsn, src_addr);
8295b9c547cSRui Paulo if (peer == NULL)
830e28a4053SRui Paulo return -1;
8315b9c547cSRui Paulo
8325b9c547cSRui Paulo /* assume the peer is authenticated already */
8335b9c547cSRui Paulo wpa_printf(MSG_DEBUG, "RSN: IBSS Not using IBSS Auth for peer "
8345b9c547cSRui Paulo MACSTR, MAC2STR(src_addr));
8355b9c547cSRui Paulo ibss_rsn_peer_authenticated(ibss_rsn, peer,
8365b9c547cSRui Paulo IBSS_RSN_AUTH_EAPOL_BY_US);
8375b9c547cSRui Paulo
838e28a4053SRui Paulo return ibss_rsn_process_rx_eapol(ibss_rsn, ibss_rsn->peers,
839e28a4053SRui Paulo buf, len);
840e28a4053SRui Paulo }
841e28a4053SRui Paulo
842e28a4053SRui Paulo return 0;
843e28a4053SRui Paulo }
844e28a4053SRui Paulo
ibss_rsn_set_psk(struct ibss_rsn * ibss_rsn,const u8 * psk)845e28a4053SRui Paulo void ibss_rsn_set_psk(struct ibss_rsn *ibss_rsn, const u8 *psk)
846e28a4053SRui Paulo {
847f05cddf9SRui Paulo if (ibss_rsn == NULL)
848f05cddf9SRui Paulo return;
849e28a4053SRui Paulo os_memcpy(ibss_rsn->psk, psk, PMK_LEN);
850e28a4053SRui Paulo }
8515b9c547cSRui Paulo
8525b9c547cSRui Paulo
ibss_rsn_handle_auth_1_of_2(struct ibss_rsn * ibss_rsn,struct ibss_rsn_peer * peer,const u8 * addr)8535b9c547cSRui Paulo static void ibss_rsn_handle_auth_1_of_2(struct ibss_rsn *ibss_rsn,
8545b9c547cSRui Paulo struct ibss_rsn_peer *peer,
8555b9c547cSRui Paulo const u8* addr)
8565b9c547cSRui Paulo {
8575b9c547cSRui Paulo wpa_printf(MSG_DEBUG, "RSN: IBSS RX Auth frame (SEQ 1) from " MACSTR,
8585b9c547cSRui Paulo MAC2STR(addr));
8595b9c547cSRui Paulo
8605b9c547cSRui Paulo if (peer &&
86185732ac8SCy Schubert peer->authentication_status & (IBSS_RSN_SET_PTK_SUPP |
86285732ac8SCy Schubert IBSS_RSN_SET_PTK_AUTH)) {
86385732ac8SCy Schubert /* Clear the TK for this pair to allow recovery from the case
86485732ac8SCy Schubert * where the peer STA has restarted and lost its key while we
86585732ac8SCy Schubert * still have a pairwise key configured. */
86685732ac8SCy Schubert wpa_printf(MSG_DEBUG, "RSN: Clear pairwise key for peer "
86785732ac8SCy Schubert MACSTR, MAC2STR(addr));
86885732ac8SCy Schubert wpa_drv_set_key(ibss_rsn->wpa_s, WPA_ALG_NONE, addr, 0, 0,
869*c1d255d3SCy Schubert NULL, 0, NULL, 0, KEY_FLAG_PAIRWISE);
87085732ac8SCy Schubert }
87185732ac8SCy Schubert
87285732ac8SCy Schubert if (peer &&
8735b9c547cSRui Paulo peer->authentication_status & IBSS_RSN_AUTH_EAPOL_BY_PEER) {
8745b9c547cSRui Paulo if (peer->own_auth_tx.sec) {
8755b9c547cSRui Paulo struct os_reltime now, diff;
8765b9c547cSRui Paulo os_get_reltime(&now);
8775b9c547cSRui Paulo os_reltime_sub(&now, &peer->own_auth_tx, &diff);
8785b9c547cSRui Paulo if (diff.sec == 0 && diff.usec < 500000) {
8795b9c547cSRui Paulo wpa_printf(MSG_DEBUG, "RSN: Skip IBSS reinit since only %u usec from own Auth frame TX",
8805b9c547cSRui Paulo (int) diff.usec);
8815b9c547cSRui Paulo goto skip_reinit;
8825b9c547cSRui Paulo }
8835b9c547cSRui Paulo }
8845b9c547cSRui Paulo /*
8855b9c547cSRui Paulo * A peer sent us an Authentication frame even though it already
8865b9c547cSRui Paulo * started an EAPOL session. We should reinit state machines
8875b9c547cSRui Paulo * here, but it's much more complicated than just deleting and
8885b9c547cSRui Paulo * recreating the state machine
8895b9c547cSRui Paulo */
8905b9c547cSRui Paulo wpa_printf(MSG_DEBUG, "RSN: IBSS Reinitializing station "
8915b9c547cSRui Paulo MACSTR, MAC2STR(addr));
8925b9c547cSRui Paulo
8935b9c547cSRui Paulo ibss_rsn_stop(ibss_rsn, addr);
8945b9c547cSRui Paulo peer = NULL;
8955b9c547cSRui Paulo }
8965b9c547cSRui Paulo
8975b9c547cSRui Paulo if (!peer) {
8985b9c547cSRui Paulo peer = ibss_rsn_peer_init(ibss_rsn, addr);
8995b9c547cSRui Paulo if (!peer)
9005b9c547cSRui Paulo return;
9015b9c547cSRui Paulo
9025b9c547cSRui Paulo wpa_printf(MSG_DEBUG, "RSN: IBSS Auth started by peer " MACSTR,
9035b9c547cSRui Paulo MAC2STR(addr));
9045b9c547cSRui Paulo }
9055b9c547cSRui Paulo
9065b9c547cSRui Paulo skip_reinit:
9075b9c547cSRui Paulo /* reply with an Authentication frame now, before sending an EAPOL */
9085b9c547cSRui Paulo ibss_rsn_send_auth(ibss_rsn, addr, 2);
9095b9c547cSRui Paulo /* no need to start another AUTH challenge in the other way.. */
9105b9c547cSRui Paulo ibss_rsn_peer_authenticated(ibss_rsn, peer, IBSS_RSN_AUTH_EAPOL_BY_US);
9115b9c547cSRui Paulo }
9125b9c547cSRui Paulo
9135b9c547cSRui Paulo
ibss_rsn_handle_auth(struct ibss_rsn * ibss_rsn,const u8 * auth_frame,size_t len)9145b9c547cSRui Paulo void ibss_rsn_handle_auth(struct ibss_rsn *ibss_rsn, const u8 *auth_frame,
9155b9c547cSRui Paulo size_t len)
9165b9c547cSRui Paulo {
9175b9c547cSRui Paulo const struct ieee80211_mgmt *header;
9185b9c547cSRui Paulo struct ibss_rsn_peer *peer;
9195b9c547cSRui Paulo size_t auth_length;
9205b9c547cSRui Paulo
9215b9c547cSRui Paulo header = (const struct ieee80211_mgmt *) auth_frame;
9225b9c547cSRui Paulo auth_length = IEEE80211_HDRLEN + sizeof(header->u.auth);
9235b9c547cSRui Paulo
9245b9c547cSRui Paulo if (ibss_rsn == NULL || len < auth_length)
9255b9c547cSRui Paulo return;
9265b9c547cSRui Paulo
9275b9c547cSRui Paulo if (le_to_host16(header->u.auth.auth_alg) != WLAN_AUTH_OPEN ||
9285b9c547cSRui Paulo le_to_host16(header->u.auth.status_code) != WLAN_STATUS_SUCCESS)
9295b9c547cSRui Paulo return;
9305b9c547cSRui Paulo
9315b9c547cSRui Paulo peer = ibss_rsn_get_peer(ibss_rsn, header->sa);
9325b9c547cSRui Paulo
9335b9c547cSRui Paulo switch (le_to_host16(header->u.auth.auth_transaction)) {
9345b9c547cSRui Paulo case 1:
9355b9c547cSRui Paulo ibss_rsn_handle_auth_1_of_2(ibss_rsn, peer, header->sa);
9365b9c547cSRui Paulo break;
9375b9c547cSRui Paulo case 2:
9385b9c547cSRui Paulo wpa_printf(MSG_DEBUG, "RSN: IBSS RX Auth frame (SEQ 2) from "
9395b9c547cSRui Paulo MACSTR, MAC2STR(header->sa));
9405b9c547cSRui Paulo if (!peer) {
9415b9c547cSRui Paulo wpa_printf(MSG_DEBUG, "RSN: Received Auth seq 2 from "
9425b9c547cSRui Paulo "unknown STA " MACSTR, MAC2STR(header->sa));
9435b9c547cSRui Paulo break;
9445b9c547cSRui Paulo }
9455b9c547cSRui Paulo
9465b9c547cSRui Paulo /* authentication has been completed */
9475b9c547cSRui Paulo eloop_cancel_timeout(ibss_rsn_auth_timeout, peer, NULL);
9485b9c547cSRui Paulo wpa_printf(MSG_DEBUG, "RSN: IBSS Auth completed with " MACSTR,
9495b9c547cSRui Paulo MAC2STR(header->sa));
9505b9c547cSRui Paulo ibss_rsn_peer_authenticated(ibss_rsn, peer,
9515b9c547cSRui Paulo IBSS_RSN_AUTH_BY_US);
9525b9c547cSRui Paulo break;
9535b9c547cSRui Paulo }
9545b9c547cSRui Paulo }
955