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00015 #include "includes.h"
00016
00017 #include "common.h"
00018 #include "l2_packet/l2_packet.h"
00019 #include "rsn_supp/wpa.h"
00020 #include "rsn_supp/wpa_ie.h"
00021 #include "ap/wpa_auth.h"
00022 #include "wpa_supplicant_i.h"
00023 #include "driver_i.h"
00024 #include "ibss_rsn.h"
00025
00026
00027 static void ibss_rsn_free(struct ibss_rsn_peer *peer)
00028 {
00029 wpa_auth_sta_deinit(peer->auth);
00030 wpa_sm_deinit(peer->supp);
00031 os_free(peer);
00032 }
00033
00034
00035 static void supp_set_state(void *ctx, enum wpa_states state)
00036 {
00037 struct ibss_rsn_peer *peer = ctx;
00038 peer->supp_state = state;
00039 }
00040
00041
00042 static int supp_ether_send(void *ctx, const u8 *dest, u16 proto, const u8 *buf,
00043 size_t len)
00044 {
00045 struct ibss_rsn_peer *peer = ctx;
00046 struct wpa_supplicant *wpa_s = peer->ibss_rsn->wpa_s;
00047
00048 wpa_printf(MSG_DEBUG, "SUPP: %s(dest=" MACSTR " proto=0x%04x "
00049 "len=%lu)",
00050 __func__, MAC2STR(dest), proto, (unsigned long) len);
00051
00052 if (wpa_s->l2)
00053 return l2_packet_send(wpa_s->l2, dest, proto, buf, len);
00054
00055 return wpa_drv_send_eapol(wpa_s, dest, proto, buf, len);
00056 }
00057
00058
00059 static u8 * supp_alloc_eapol(void *ctx, u8 type, const void *data,
00060 u16 data_len, size_t *msg_len, void **data_pos)
00061 {
00062 struct ieee802_1x_hdr *hdr;
00063
00064 wpa_printf(MSG_DEBUG, "SUPP: %s(type=%d data_len=%d)",
00065 __func__, type, data_len);
00066
00067 *msg_len = sizeof(*hdr) + data_len;
00068 hdr = os_malloc(*msg_len);
00069 if (hdr == NULL)
00070 return NULL;
00071
00072 hdr->version = 2;
00073 hdr->type = type;
00074 hdr->length = host_to_be16(data_len);
00075
00076 if (data)
00077 os_memcpy(hdr + 1, data, data_len);
00078 else
00079 os_memset(hdr + 1, 0, data_len);
00080
00081 if (data_pos)
00082 *data_pos = hdr + 1;
00083
00084 return (u8 *) hdr;
00085 }
00086
00087
00088 static int supp_get_beacon_ie(void *ctx)
00089 {
00090 struct ibss_rsn_peer *peer = ctx;
00091
00092 wpa_printf(MSG_DEBUG, "SUPP: %s", __func__);
00093
00094 return wpa_sm_set_ap_rsn_ie(peer->supp,
00095 (u8 *) "\x30\x14\x01\x00"
00096 "\x00\x0f\xac\x04"
00097 "\x01\x00\x00\x0f\xac\x04"
00098 "\x01\x00\x00\x0f\xac\x02"
00099 "\x00\x00", 22);
00100 }
00101
00102
00103 static int supp_set_key(void *ctx, enum wpa_alg alg,
00104 const u8 *addr, int key_idx, int set_tx,
00105 const u8 *seq, size_t seq_len,
00106 const u8 *key, size_t key_len)
00107 {
00108 struct ibss_rsn_peer *peer = ctx;
00109
00110 wpa_printf(MSG_DEBUG, "SUPP: %s(alg=%d addr=" MACSTR " key_idx=%d "
00111 "set_tx=%d)",
00112 __func__, alg, MAC2STR(addr), key_idx, set_tx);
00113 wpa_hexdump(MSG_DEBUG, "SUPP: set_key - seq", seq, seq_len);
00114 wpa_hexdump_key(MSG_DEBUG, "SUPP: set_key - key", key, key_len);
00115
00116 if (key_idx == 0) {
00117
00118
00119
00120
00121 if (os_memcmp(peer->ibss_rsn->wpa_s->own_addr, peer->addr,
00122 ETH_ALEN) > 0) {
00123 wpa_printf(MSG_DEBUG, "SUPP: Do not use this PTK");
00124 return 0;
00125 }
00126 }
00127
00128 return wpa_drv_set_key(peer->ibss_rsn->wpa_s, alg, addr, key_idx,
00129 set_tx, seq, seq_len, key, key_len);
00130 }
00131
00132
00133 static void * supp_get_network_ctx(void *ctx)
00134 {
00135 struct ibss_rsn_peer *peer = ctx;
00136 return wpa_supplicant_get_ssid(peer->ibss_rsn->wpa_s);
00137 }
00138
00139
00140 static int supp_mlme_setprotection(void *ctx, const u8 *addr,
00141 int protection_type, int key_type)
00142 {
00143 wpa_printf(MSG_DEBUG, "SUPP: %s(addr=" MACSTR " protection_type=%d "
00144 "key_type=%d)",
00145 __func__, MAC2STR(addr), protection_type, key_type);
00146 return 0;
00147 }
00148
00149
00150 static void supp_cancel_auth_timeout(void *ctx)
00151 {
00152 wpa_printf(MSG_DEBUG, "SUPP: %s", __func__);
00153 }
00154
00155
00156 int ibss_rsn_supp_init(struct ibss_rsn_peer *peer, const u8 *own_addr,
00157 const u8 *psk)
00158 {
00159 struct wpa_sm_ctx *ctx = os_zalloc(sizeof(*ctx));
00160 if (ctx == NULL)
00161 return -1;
00162
00163 ctx->ctx = peer;
00164 ctx->msg_ctx = peer->ibss_rsn->wpa_s;
00165 ctx->set_state = supp_set_state;
00166 ctx->ether_send = supp_ether_send;
00167 ctx->get_beacon_ie = supp_get_beacon_ie;
00168 ctx->alloc_eapol = supp_alloc_eapol;
00169 ctx->set_key = supp_set_key;
00170 ctx->get_network_ctx = supp_get_network_ctx;
00171 ctx->mlme_setprotection = supp_mlme_setprotection;
00172 ctx->cancel_auth_timeout = supp_cancel_auth_timeout;
00173 peer->supp = wpa_sm_init(ctx);
00174 if (peer->supp == NULL) {
00175 wpa_printf(MSG_DEBUG, "SUPP: wpa_sm_init() failed");
00176 return -1;
00177 }
00178
00179 wpa_sm_set_own_addr(peer->supp, own_addr);
00180 wpa_sm_set_param(peer->supp, WPA_PARAM_RSN_ENABLED, 1);
00181 wpa_sm_set_param(peer->supp, WPA_PARAM_PROTO, WPA_PROTO_RSN);
00182 wpa_sm_set_param(peer->supp, WPA_PARAM_PAIRWISE, WPA_CIPHER_CCMP);
00183 wpa_sm_set_param(peer->supp, WPA_PARAM_GROUP, WPA_CIPHER_CCMP);
00184 wpa_sm_set_param(peer->supp, WPA_PARAM_KEY_MGMT, WPA_KEY_MGMT_PSK);
00185 wpa_sm_set_pmk(peer->supp, psk, PMK_LEN);
00186
00187 peer->supp_ie_len = sizeof(peer->supp_ie);
00188 if (wpa_sm_set_assoc_wpa_ie_default(peer->supp, peer->supp_ie,
00189 &peer->supp_ie_len) < 0) {
00190 wpa_printf(MSG_DEBUG, "SUPP: wpa_sm_set_assoc_wpa_ie_default()"
00191 " failed");
00192 return -1;
00193 }
00194
00195 wpa_sm_notify_assoc(peer->supp, peer->addr);
00196
00197 return 0;
00198 }
00199
00200
00201 static void auth_logger(void *ctx, const u8 *addr, logger_level level,
00202 const char *txt)
00203 {
00204 if (addr)
00205 wpa_printf(MSG_DEBUG, "AUTH: " MACSTR " - %s",
00206 MAC2STR(addr), txt);
00207 else
00208 wpa_printf(MSG_DEBUG, "AUTH: %s", txt);
00209 }
00210
00211
00212 static const u8 * auth_get_psk(void *ctx, const u8 *addr, const u8 *prev_psk)
00213 {
00214 struct ibss_rsn *ibss_rsn = ctx;
00215 wpa_printf(MSG_DEBUG, "AUTH: %s (addr=" MACSTR " prev_psk=%p)",
00216 __func__, MAC2STR(addr), prev_psk);
00217 if (prev_psk)
00218 return NULL;
00219 return ibss_rsn->psk;
00220 }
00221
00222
00223 static int auth_send_eapol(void *ctx, const u8 *addr, const u8 *data,
00224 size_t data_len, int encrypt)
00225 {
00226 struct ibss_rsn *ibss_rsn = ctx;
00227 struct wpa_supplicant *wpa_s = ibss_rsn->wpa_s;
00228
00229 wpa_printf(MSG_DEBUG, "AUTH: %s(addr=" MACSTR " data_len=%lu "
00230 "encrypt=%d)",
00231 __func__, MAC2STR(addr), (unsigned long) data_len, encrypt);
00232
00233 if (wpa_s->l2)
00234 return l2_packet_send(wpa_s->l2, addr, ETH_P_EAPOL, data,
00235 data_len);
00236
00237 return wpa_drv_send_eapol(wpa_s, addr, ETH_P_EAPOL, data, data_len);
00238 }
00239
00240
00241 static int auth_set_key(void *ctx, int vlan_id, enum wpa_alg alg,
00242 const u8 *addr, int idx, u8 *key, size_t key_len)
00243 {
00244 struct ibss_rsn *ibss_rsn = ctx;
00245 u8 seq[6];
00246
00247 os_memset(seq, 0, sizeof(seq));
00248
00249 if (addr) {
00250 wpa_printf(MSG_DEBUG, "AUTH: %s(alg=%d addr=" MACSTR
00251 " key_idx=%d)",
00252 __func__, alg, MAC2STR(addr), idx);
00253 } else {
00254 wpa_printf(MSG_DEBUG, "AUTH: %s(alg=%d key_idx=%d)",
00255 __func__, alg, idx);
00256 }
00257 wpa_hexdump_key(MSG_DEBUG, "AUTH: set_key - key", key, key_len);
00258
00259 if (idx == 0) {
00260
00261
00262
00263
00264 if (addr == NULL ||
00265 os_memcmp(ibss_rsn->wpa_s->own_addr, addr, ETH_ALEN) < 0) {
00266 wpa_printf(MSG_DEBUG, "AUTH: Do not use this PTK");
00267 return 0;
00268 }
00269 }
00270
00271 return wpa_drv_set_key(ibss_rsn->wpa_s, alg, addr, idx,
00272 1, seq, 6, key, key_len);
00273 }
00274
00275
00276 static int ibss_rsn_auth_init_group(struct ibss_rsn *ibss_rsn,
00277 const u8 *own_addr)
00278 {
00279 struct wpa_auth_config conf;
00280 struct wpa_auth_callbacks cb;
00281
00282 wpa_printf(MSG_DEBUG, "AUTH: Initializing group state machine");
00283
00284 os_memset(&conf, 0, sizeof(conf));
00285 conf.wpa = 2;
00286 conf.wpa_key_mgmt = WPA_KEY_MGMT_PSK;
00287 conf.wpa_pairwise = WPA_CIPHER_CCMP;
00288 conf.rsn_pairwise = WPA_CIPHER_CCMP;
00289 conf.wpa_group = WPA_CIPHER_CCMP;
00290 conf.eapol_version = 2;
00291
00292 os_memset(&cb, 0, sizeof(cb));
00293 cb.ctx = ibss_rsn;
00294 cb.logger = auth_logger;
00295 cb.send_eapol = auth_send_eapol;
00296 cb.get_psk = auth_get_psk;
00297 cb.set_key = auth_set_key;
00298
00299 ibss_rsn->auth_group = wpa_init(own_addr, &conf, &cb);
00300 if (ibss_rsn->auth_group == NULL) {
00301 wpa_printf(MSG_DEBUG, "AUTH: wpa_init() failed");
00302 return -1;
00303 }
00304
00305 return 0;
00306 }
00307
00308
00309 static int ibss_rsn_auth_init(struct ibss_rsn *ibss_rsn,
00310 struct ibss_rsn_peer *peer)
00311 {
00312 peer->auth = wpa_auth_sta_init(ibss_rsn->auth_group, peer->addr);
00313 if (peer->auth == NULL) {
00314 wpa_printf(MSG_DEBUG, "AUTH: wpa_auth_sta_init() failed");
00315 return -1;
00316 }
00317
00318
00319 if (wpa_validate_wpa_ie(ibss_rsn->auth_group, peer->auth,
00320 (u8 *) "\x30\x14\x01\x00"
00321 "\x00\x0f\xac\x04"
00322 "\x01\x00\x00\x0f\xac\x04"
00323 "\x01\x00\x00\x0f\xac\x02"
00324 "\x00\x00", 22, NULL, 0) !=
00325 WPA_IE_OK) {
00326 wpa_printf(MSG_DEBUG, "AUTH: wpa_validate_wpa_ie() failed");
00327 return -1;
00328 }
00329
00330 if (wpa_auth_sm_event(peer->auth, WPA_ASSOC))
00331 return -1;
00332
00333 if (wpa_auth_sta_associated(ibss_rsn->auth_group, peer->auth))
00334 return -1;
00335
00336 return 0;
00337 }
00338
00339
00340 int ibss_rsn_start(struct ibss_rsn *ibss_rsn, const u8 *addr)
00341 {
00342 struct ibss_rsn_peer *peer;
00343
00344 wpa_printf(MSG_DEBUG, "RSN: Starting IBSS Authenticator and "
00345 "Supplicant for peer " MACSTR, MAC2STR(addr));
00346
00347 peer = os_zalloc(sizeof(*peer));
00348 if (peer == NULL)
00349 return -1;
00350
00351 peer->ibss_rsn = ibss_rsn;
00352 os_memcpy(peer->addr, addr, ETH_ALEN);
00353
00354 if (ibss_rsn_supp_init(peer, ibss_rsn->wpa_s->own_addr, ibss_rsn->psk)
00355 < 0) {
00356 ibss_rsn_free(peer);
00357 return -1;
00358 }
00359
00360 if (ibss_rsn_auth_init(ibss_rsn, peer) < 0) {
00361 ibss_rsn_free(peer);
00362 return -1;
00363 }
00364
00365 peer->next = ibss_rsn->peers;
00366 ibss_rsn->peers = peer;
00367
00368 return 0;
00369 }
00370
00371
00372 struct ibss_rsn * ibss_rsn_init(struct wpa_supplicant *wpa_s)
00373 {
00374 struct ibss_rsn *ibss_rsn;
00375
00376 ibss_rsn = os_zalloc(sizeof(*ibss_rsn));
00377 if (ibss_rsn == NULL)
00378 return NULL;
00379 ibss_rsn->wpa_s = wpa_s;
00380
00381 if (ibss_rsn_auth_init_group(ibss_rsn, wpa_s->own_addr) < 0) {
00382 ibss_rsn_deinit(ibss_rsn);
00383 return NULL;
00384 }
00385
00386 return ibss_rsn;
00387 }
00388
00389
00390 void ibss_rsn_deinit(struct ibss_rsn *ibss_rsn)
00391 {
00392 struct ibss_rsn_peer *peer, *prev;
00393
00394 if (ibss_rsn == NULL)
00395 return;
00396
00397 peer = ibss_rsn->peers;
00398 while (peer) {
00399 prev = peer;
00400 peer = peer->next;
00401 ibss_rsn_free(prev);
00402 }
00403
00404 wpa_deinit(ibss_rsn->auth_group);
00405 os_free(ibss_rsn);
00406
00407 }
00408
00409
00410 static int ibss_rsn_eapol_dst_supp(const u8 *buf, size_t len)
00411 {
00412 const struct ieee802_1x_hdr *hdr;
00413 const struct wpa_eapol_key *key;
00414 u16 key_info;
00415 size_t plen;
00416
00417
00418
00419 if (len < sizeof(*hdr) + sizeof(*key))
00420 return -1;
00421
00422 hdr = (const struct ieee802_1x_hdr *) buf;
00423 key = (const struct wpa_eapol_key *) (hdr + 1);
00424 plen = be_to_host16(hdr->length);
00425
00426 if (hdr->version < EAPOL_VERSION) {
00427
00428 }
00429 if (hdr->type != IEEE802_1X_TYPE_EAPOL_KEY) {
00430 wpa_printf(MSG_DEBUG, "RSN: EAPOL frame (type %u) discarded, "
00431 "not a Key frame", hdr->type);
00432 return -1;
00433 }
00434 if (plen > len - sizeof(*hdr) || plen < sizeof(*key)) {
00435 wpa_printf(MSG_DEBUG, "RSN: EAPOL frame payload size %lu "
00436 "invalid (frame size %lu)",
00437 (unsigned long) plen, (unsigned long) len);
00438 return -1;
00439 }
00440
00441 if (key->type != EAPOL_KEY_TYPE_RSN) {
00442 wpa_printf(MSG_DEBUG, "RSN: EAPOL-Key type (%d) unknown, "
00443 "discarded", key->type);
00444 return -1;
00445 }
00446
00447 key_info = WPA_GET_BE16(key->key_info);
00448
00449 return !!(key_info & WPA_KEY_INFO_ACK);
00450 }
00451
00452
00453 static int ibss_rsn_process_rx_eapol(struct ibss_rsn *ibss_rsn,
00454 struct ibss_rsn_peer *peer,
00455 const u8 *buf, size_t len)
00456 {
00457 int supp;
00458 u8 *tmp;
00459
00460 supp = ibss_rsn_eapol_dst_supp(buf, len);
00461 if (supp < 0)
00462 return -1;
00463
00464 tmp = os_malloc(len);
00465 if (tmp == NULL)
00466 return -1;
00467 os_memcpy(tmp, buf, len);
00468 if (supp) {
00469 wpa_printf(MSG_DEBUG, "RSN: IBSS RX EAPOL for Supplicant");
00470 wpa_sm_rx_eapol(peer->supp, peer->addr, tmp, len);
00471 } else {
00472 wpa_printf(MSG_DEBUG, "RSN: IBSS RX EAPOL for Authenticator");
00473 wpa_receive(ibss_rsn->auth_group, peer->auth, tmp, len);
00474 }
00475 os_free(tmp);
00476
00477 return 1;
00478 }
00479
00480
00481 int ibss_rsn_rx_eapol(struct ibss_rsn *ibss_rsn, const u8 *src_addr,
00482 const u8 *buf, size_t len)
00483 {
00484 struct ibss_rsn_peer *peer;
00485
00486 for (peer = ibss_rsn->peers; peer; peer = peer->next) {
00487 if (os_memcmp(src_addr, peer->addr, ETH_ALEN) == 0)
00488 return ibss_rsn_process_rx_eapol(ibss_rsn, peer,
00489 buf, len);
00490 }
00491
00492 if (ibss_rsn_eapol_dst_supp(buf, len) > 0) {
00493
00494
00495
00496
00497 if (ibss_rsn_start(ibss_rsn, src_addr) < 0)
00498 return -1;
00499 return ibss_rsn_process_rx_eapol(ibss_rsn, ibss_rsn->peers,
00500 buf, len);
00501 }
00502
00503 return 0;
00504 }
00505
00506
00507 void ibss_rsn_set_psk(struct ibss_rsn *ibss_rsn, const u8 *psk)
00508 {
00509 os_memcpy(ibss_rsn->psk, psk, PMK_LEN);
00510 }