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 wpa_printf(MSG_DEBUG, "RSN: Starting IBSS Authenticator and "
365 "Supplicant for peer " MACSTR, MAC2STR(addr));
367 peer = os_zalloc(sizeof(*peer));
371 peer->ibss_rsn = ibss_rsn;
372 os_memcpy(peer->addr, addr, ETH_ALEN);
374 if (ibss_rsn_supp_init(peer, ibss_rsn->wpa_s->own_addr, ibss_rsn->psk)
380 if (ibss_rsn_auth_init(ibss_rsn, peer) < 0) {
385 peer->next = ibss_rsn->peers;
386 ibss_rsn->peers = peer;
392 struct ibss_rsn * ibss_rsn_init(struct wpa_supplicant *wpa_s)
394 struct ibss_rsn *ibss_rsn;
396 ibss_rsn = os_zalloc(sizeof(*ibss_rsn));
397 if (ibss_rsn == NULL)
399 ibss_rsn->wpa_s = wpa_s;
401 if (ibss_rsn_auth_init_group(ibss_rsn, wpa_s->own_addr) < 0) {
402 ibss_rsn_deinit(ibss_rsn);
410 void ibss_rsn_deinit(struct ibss_rsn *ibss_rsn)
412 struct ibss_rsn_peer *peer, *prev;
414 if (ibss_rsn == NULL)
417 peer = ibss_rsn->peers;
424 wpa_deinit(ibss_rsn->auth_group);
430 static int ibss_rsn_eapol_dst_supp(const u8 *buf, size_t len)
432 const struct ieee802_1x_hdr *hdr;
433 const struct wpa_eapol_key *key;
437 /* TODO: Support other EAPOL packets than just EAPOL-Key */
439 if (len < sizeof(*hdr) + sizeof(*key))
442 hdr = (const struct ieee802_1x_hdr *) buf;
443 key = (const struct wpa_eapol_key *) (hdr + 1);
444 plen = be_to_host16(hdr->length);
446 if (hdr->version < EAPOL_VERSION) {
447 /* TODO: backwards compatibility */
449 if (hdr->type != IEEE802_1X_TYPE_EAPOL_KEY) {
450 wpa_printf(MSG_DEBUG, "RSN: EAPOL frame (type %u) discarded, "
451 "not a Key frame", hdr->type);
454 if (plen > len - sizeof(*hdr) || plen < sizeof(*key)) {
455 wpa_printf(MSG_DEBUG, "RSN: EAPOL frame payload size %lu "
456 "invalid (frame size %lu)",
457 (unsigned long) plen, (unsigned long) len);
461 if (key->type != EAPOL_KEY_TYPE_RSN) {
462 wpa_printf(MSG_DEBUG, "RSN: EAPOL-Key type (%d) unknown, "
463 "discarded", key->type);
467 key_info = WPA_GET_BE16(key->key_info);
469 return !!(key_info & WPA_KEY_INFO_ACK);
473 static int ibss_rsn_process_rx_eapol(struct ibss_rsn *ibss_rsn,
474 struct ibss_rsn_peer *peer,
475 const u8 *buf, size_t len)
480 supp = ibss_rsn_eapol_dst_supp(buf, len);
484 tmp = os_malloc(len);
487 os_memcpy(tmp, buf, len);
489 wpa_printf(MSG_DEBUG, "RSN: IBSS RX EAPOL for Supplicant");
490 wpa_sm_rx_eapol(peer->supp, peer->addr, tmp, len);
492 wpa_printf(MSG_DEBUG, "RSN: IBSS RX EAPOL for Authenticator");
493 wpa_receive(ibss_rsn->auth_group, peer->auth, tmp, len);
501 int ibss_rsn_rx_eapol(struct ibss_rsn *ibss_rsn, const u8 *src_addr,
502 const u8 *buf, size_t len)
504 struct ibss_rsn_peer *peer;
506 for (peer = ibss_rsn->peers; peer; peer = peer->next) {
507 if (os_memcmp(src_addr, peer->addr, ETH_ALEN) == 0)
508 return ibss_rsn_process_rx_eapol(ibss_rsn, peer,
512 if (ibss_rsn_eapol_dst_supp(buf, len) > 0) {
514 * Create new IBSS peer based on an EAPOL message from the peer
517 if (ibss_rsn_start(ibss_rsn, src_addr) < 0)
519 return ibss_rsn_process_rx_eapol(ibss_rsn, ibss_rsn->peers,
527 void ibss_rsn_set_psk(struct ibss_rsn *ibss_rsn, const u8 *psk)
529 os_memcpy(ibss_rsn->psk, psk, PMK_LEN);
533 void ibss_rsn_connected(struct ibss_rsn *ibss_rsn)
536 wpa_printf(MSG_DEBUG, "RSN: IBSS connected notification");
537 if (ibss_rsn->init_gtk_idx) {
538 wpa_printf(MSG_DEBUG, "RSN: Set initial IBSS TX GTK");
539 os_memset(seq, 0, sizeof(seq));
540 if (wpa_drv_set_key(ibss_rsn->wpa_s, WPA_ALG_CCMP,
541 broadcast_ether_addr,
542 ibss_rsn->init_gtk_idx,
543 1, seq, sizeof(seq), ibss_rsn->init_gtk,
545 wpa_printf(MSG_INFO, "RSN: Failed to set IBSS TX GTK");
546 ibss_rsn->init_gtk_idx = 0;
547 os_memset(ibss_rsn->init_gtk, 0, sizeof(ibss_rsn->init_gtk));