1 /* 2 * hostapd / WPA authenticator glue code 3 * Copyright (c) 2002-2011, Jouni Malinen <j (at) w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9 #include "utils/includes.h" 10 11 #include "utils/common.h" 12 #include "common/ieee802_11_defs.h" 13 #include "eapol_auth/eapol_auth_sm.h" 14 #include "eapol_auth/eapol_auth_sm_i.h" 15 #include "eap_server/eap.h" 16 #include "l2_packet/l2_packet.h" 17 #include "drivers/driver.h" 18 #include "hostapd.h" 19 #include "ieee802_1x.h" 20 #include "preauth_auth.h" 21 #include "sta_info.h" 22 #include "tkip_countermeasures.h" 23 #include "ap_drv_ops.h" 24 #include "ap_config.h" 25 #include "wpa_auth.h" 26 #include "wpa_auth_glue.h" 27 28 29 static void hostapd_wpa_auth_conf(struct hostapd_bss_config *conf, 30 struct wpa_auth_config *wconf) 31 { 32 os_memset(wconf, 0, sizeof(*wconf)); 33 wconf->wpa = conf->wpa; 34 wconf->wpa_key_mgmt = conf->wpa_key_mgmt; 35 wconf->wpa_pairwise = conf->wpa_pairwise; 36 wconf->wpa_group = conf->wpa_group; 37 wconf->wpa_group_rekey = conf->wpa_group_rekey; 38 wconf->wpa_strict_rekey = conf->wpa_strict_rekey; 39 wconf->wpa_gmk_rekey = conf->wpa_gmk_rekey; 40 wconf->wpa_ptk_rekey = conf->wpa_ptk_rekey; 41 wconf->rsn_pairwise = conf->rsn_pairwise; 42 wconf->rsn_preauth = conf->rsn_preauth; 43 wconf->eapol_version = conf->eapol_version; 44 wconf->peerkey = conf->peerkey; 45 wconf->wmm_enabled = conf->wmm_enabled; 46 wconf->wmm_uapsd = conf->wmm_uapsd; 47 wconf->disable_pmksa_caching = conf->disable_pmksa_caching; 48 wconf->okc = conf->okc; 49 #ifdef CONFIG_IEEE80211W 50 wconf->ieee80211w = conf->ieee80211w; 51 #endif /* CONFIG_IEEE80211W */ 52 #ifdef CONFIG_IEEE80211R 53 wconf->ssid_len = conf->ssid.ssid_len; 54 if (wconf->ssid_len > SSID_LEN) 55 wconf->ssid_len = SSID_LEN; 56 os_memcpy(wconf->ssid, conf->ssid.ssid, wconf->ssid_len); 57 os_memcpy(wconf->mobility_domain, conf->mobility_domain, 58 MOBILITY_DOMAIN_ID_LEN); 59 if (conf->nas_identifier && 60 os_strlen(conf->nas_identifier) <= FT_R0KH_ID_MAX_LEN) { 61 wconf->r0_key_holder_len = os_strlen(conf->nas_identifier); 62 os_memcpy(wconf->r0_key_holder, conf->nas_identifier, 63 wconf->r0_key_holder_len); 64 } 65 os_memcpy(wconf->r1_key_holder, conf->r1_key_holder, FT_R1KH_ID_LEN); 66 wconf->r0_key_lifetime = conf->r0_key_lifetime; 67 wconf->reassociation_deadline = conf->reassociation_deadline; 68 wconf->r0kh_list = conf->r0kh_list; 69 wconf->r1kh_list = conf->r1kh_list; 70 wconf->pmk_r1_push = conf->pmk_r1_push; 71 wconf->ft_over_ds = conf->ft_over_ds; 72 #endif /* CONFIG_IEEE80211R */ 73 } 74 75 76 static void hostapd_wpa_auth_logger(void *ctx, const u8 *addr, 77 logger_level level, const char *txt) 78 { 79 #ifndef CONFIG_NO_HOSTAPD_LOGGER 80 struct hostapd_data *hapd = ctx; 81 int hlevel; 82 83 switch (level) { 84 case LOGGER_WARNING: 85 hlevel = HOSTAPD_LEVEL_WARNING; 86 break; 87 case LOGGER_INFO: 88 hlevel = HOSTAPD_LEVEL_INFO; 89 break; 90 case LOGGER_DEBUG: 91 default: 92 hlevel = HOSTAPD_LEVEL_DEBUG; 93 break; 94 } 95 96 hostapd_logger(hapd, addr, HOSTAPD_MODULE_WPA, hlevel, "%s", txt); 97 #endif /* CONFIG_NO_HOSTAPD_LOGGER */ 98 } 99 100 101 static void hostapd_wpa_auth_disconnect(void *ctx, const u8 *addr, 102 u16 reason) 103 { 104 struct hostapd_data *hapd = ctx; 105 wpa_printf(MSG_DEBUG, "%s: WPA authenticator requests disconnect: " 106 "STA " MACSTR " reason %d", 107 __func__, MAC2STR(addr), reason); 108 ap_sta_disconnect(hapd, NULL, addr, reason); 109 } 110 111 112 static void hostapd_wpa_auth_mic_failure_report(void *ctx, const u8 *addr) 113 { 114 struct hostapd_data *hapd = ctx; 115 michael_mic_failure(hapd, addr, 0); 116 } 117 118 119 static void hostapd_wpa_auth_set_eapol(void *ctx, const u8 *addr, 120 wpa_eapol_variable var, int value) 121 { 122 struct hostapd_data *hapd = ctx; 123 struct sta_info *sta = ap_get_sta(hapd, addr); 124 if (sta == NULL) 125 return; 126 switch (var) { 127 case WPA_EAPOL_portEnabled: 128 ieee802_1x_notify_port_enabled(sta->eapol_sm, value); 129 break; 130 case WPA_EAPOL_portValid: 131 ieee802_1x_notify_port_valid(sta->eapol_sm, value); 132 break; 133 case WPA_EAPOL_authorized: 134 ieee802_1x_set_sta_authorized(hapd, sta, value); 135 break; 136 case WPA_EAPOL_portControl_Auto: 137 if (sta->eapol_sm) 138 sta->eapol_sm->portControl = Auto; 139 break; 140 case WPA_EAPOL_keyRun: 141 if (sta->eapol_sm) 142 sta->eapol_sm->keyRun = value ? TRUE : FALSE; 143 break; 144 case WPA_EAPOL_keyAvailable: 145 if (sta->eapol_sm) 146 sta->eapol_sm->eap_if->eapKeyAvailable = 147 value ? TRUE : FALSE; 148 break; 149 case WPA_EAPOL_keyDone: 150 if (sta->eapol_sm) 151 sta->eapol_sm->keyDone = value ? TRUE : FALSE; 152 break; 153 case WPA_EAPOL_inc_EapolFramesTx: 154 if (sta->eapol_sm) 155 sta->eapol_sm->dot1xAuthEapolFramesTx++; 156 break; 157 } 158 } 159 160 161 static int hostapd_wpa_auth_get_eapol(void *ctx, const u8 *addr, 162 wpa_eapol_variable var) 163 { 164 struct hostapd_data *hapd = ctx; 165 struct sta_info *sta = ap_get_sta(hapd, addr); 166 if (sta == NULL || sta->eapol_sm == NULL) 167 return -1; 168 switch (var) { 169 case WPA_EAPOL_keyRun: 170 return sta->eapol_sm->keyRun; 171 case WPA_EAPOL_keyAvailable: 172 return sta->eapol_sm->eap_if->eapKeyAvailable; 173 default: 174 return -1; 175 } 176 } 177 178 179 static const u8 * hostapd_wpa_auth_get_psk(void *ctx, const u8 *addr, 180 const u8 *prev_psk) 181 { 182 struct hostapd_data *hapd = ctx; 183 struct sta_info *sta = ap_get_sta(hapd, addr); 184 if (sta && sta->psk) 185 return sta->psk; 186 return hostapd_get_psk(hapd->conf, addr, prev_psk); 187 } 188 189 190 static int hostapd_wpa_auth_get_msk(void *ctx, const u8 *addr, u8 *msk, 191 size_t *len) 192 { 193 struct hostapd_data *hapd = ctx; 194 const u8 *key; 195 size_t keylen; 196 struct sta_info *sta; 197 198 sta = ap_get_sta(hapd, addr); 199 if (sta == NULL) 200 return -1; 201 202 key = ieee802_1x_get_key(sta->eapol_sm, &keylen); 203 if (key == NULL) 204 return -1; 205 206 if (keylen > *len) 207 keylen = *len; 208 os_memcpy(msk, key, keylen); 209 *len = keylen; 210 211 return 0; 212 } 213 214 215 static int hostapd_wpa_auth_set_key(void *ctx, int vlan_id, enum wpa_alg alg, 216 const u8 *addr, int idx, u8 *key, 217 size_t key_len) 218 { 219 struct hostapd_data *hapd = ctx; 220 const char *ifname = hapd->conf->iface; 221 222 if (vlan_id > 0) { 223 ifname = hostapd_get_vlan_id_ifname(hapd->conf->vlan, vlan_id); 224 if (ifname == NULL) 225 return -1; 226 } 227 228 return hostapd_drv_set_key(ifname, hapd, alg, addr, idx, 1, NULL, 0, 229 key, key_len); 230 } 231 232 233 static int hostapd_wpa_auth_get_seqnum(void *ctx, const u8 *addr, int idx, 234 u8 *seq) 235 { 236 struct hostapd_data *hapd = ctx; 237 return hostapd_get_seqnum(hapd->conf->iface, hapd, addr, idx, seq); 238 } 239 240 241 static int hostapd_wpa_auth_send_eapol(void *ctx, const u8 *addr, 242 const u8 *data, size_t data_len, 243 int encrypt) 244 { 245 struct hostapd_data *hapd = ctx; 246 struct sta_info *sta; 247 u32 flags = 0; 248 249 sta = ap_get_sta(hapd, addr); 250 if (sta) 251 flags = hostapd_sta_flags_to_drv(sta->flags); 252 253 return hostapd_drv_hapd_send_eapol(hapd, addr, data, data_len, 254 encrypt, flags); 255 } 256 257 258 static int hostapd_wpa_auth_for_each_sta( 259 void *ctx, int (*cb)(struct wpa_state_machine *sm, void *ctx), 260 void *cb_ctx) 261 { 262 struct hostapd_data *hapd = ctx; 263 struct sta_info *sta; 264 265 for (sta = hapd->sta_list; sta; sta = sta->next) { 266 if (sta->wpa_sm && cb(sta->wpa_sm, cb_ctx)) 267 return 1; 268 } 269 return 0; 270 } 271 272 273 struct wpa_auth_iface_iter_data { 274 int (*cb)(struct wpa_authenticator *sm, void *ctx); 275 void *cb_ctx; 276 }; 277 278 static int wpa_auth_iface_iter(struct hostapd_iface *iface, void *ctx) 279 { 280 struct wpa_auth_iface_iter_data *data = ctx; 281 size_t i; 282 for (i = 0; i < iface->num_bss; i++) { 283 if (iface->bss[i]->wpa_auth && 284 data->cb(iface->bss[i]->wpa_auth, data->cb_ctx)) 285 return 1; 286 } 287 return 0; 288 } 289 290 291 static int hostapd_wpa_auth_for_each_auth( 292 void *ctx, int (*cb)(struct wpa_authenticator *sm, void *ctx), 293 void *cb_ctx) 294 { 295 struct hostapd_data *hapd = ctx; 296 struct wpa_auth_iface_iter_data data; 297 if (hapd->iface->for_each_interface == NULL) 298 return -1; 299 data.cb = cb; 300 data.cb_ctx = cb_ctx; 301 return hapd->iface->for_each_interface(hapd->iface->interfaces, 302 wpa_auth_iface_iter, &data); 303 } 304 305 306 #ifdef CONFIG_IEEE80211R 307 308 struct wpa_auth_ft_iface_iter_data { 309 struct hostapd_data *src_hapd; 310 const u8 *dst; 311 const u8 *data; 312 size_t data_len; 313 }; 314 315 316 static int hostapd_wpa_auth_ft_iter(struct hostapd_iface *iface, void *ctx) 317 { 318 struct wpa_auth_ft_iface_iter_data *idata = ctx; 319 struct hostapd_data *hapd; 320 size_t j; 321 322 for (j = 0; j < iface->num_bss; j++) { 323 hapd = iface->bss[j]; 324 if (hapd == idata->src_hapd) 325 continue; 326 if (os_memcmp(hapd->own_addr, idata->dst, ETH_ALEN) == 0) { 327 wpa_printf(MSG_DEBUG, "FT: Send RRB data directly to " 328 "locally managed BSS " MACSTR "@%s -> " 329 MACSTR "@%s", 330 MAC2STR(idata->src_hapd->own_addr), 331 idata->src_hapd->conf->iface, 332 MAC2STR(hapd->own_addr), hapd->conf->iface); 333 wpa_ft_rrb_rx(hapd->wpa_auth, 334 idata->src_hapd->own_addr, 335 idata->data, idata->data_len); 336 return 1; 337 } 338 } 339 340 return 0; 341 } 342 343 #endif /* CONFIG_IEEE80211R */ 344 345 346 static int hostapd_wpa_auth_send_ether(void *ctx, const u8 *dst, u16 proto, 347 const u8 *data, size_t data_len) 348 { 349 struct hostapd_data *hapd = ctx; 350 struct l2_ethhdr *buf; 351 int ret; 352 353 #ifdef CONFIG_IEEE80211R 354 if (proto == ETH_P_RRB && hapd->iface->for_each_interface) { 355 int res; 356 struct wpa_auth_ft_iface_iter_data idata; 357 idata.src_hapd = hapd; 358 idata.dst = dst; 359 idata.data = data; 360 idata.data_len = data_len; 361 res = hapd->iface->for_each_interface(hapd->iface->interfaces, 362 hostapd_wpa_auth_ft_iter, 363 &idata); 364 if (res == 1) 365 return data_len; 366 } 367 #endif /* CONFIG_IEEE80211R */ 368 369 if (hapd->driver && hapd->driver->send_ether) 370 return hapd->driver->send_ether(hapd->drv_priv, dst, 371 hapd->own_addr, proto, 372 data, data_len); 373 if (hapd->l2 == NULL) 374 return -1; 375 376 buf = os_malloc(sizeof(*buf) + data_len); 377 if (buf == NULL) 378 return -1; 379 os_memcpy(buf->h_dest, dst, ETH_ALEN); 380 os_memcpy(buf->h_source, hapd->own_addr, ETH_ALEN); 381 buf->h_proto = host_to_be16(proto); 382 os_memcpy(buf + 1, data, data_len); 383 ret = l2_packet_send(hapd->l2, dst, proto, (u8 *) buf, 384 sizeof(*buf) + data_len); 385 os_free(buf); 386 return ret; 387 } 388 389 390 #ifdef CONFIG_IEEE80211R 391 392 static int hostapd_wpa_auth_send_ft_action(void *ctx, const u8 *dst, 393 const u8 *data, size_t data_len) 394 { 395 struct hostapd_data *hapd = ctx; 396 int res; 397 struct ieee80211_mgmt *m; 398 size_t mlen; 399 struct sta_info *sta; 400 401 sta = ap_get_sta(hapd, dst); 402 if (sta == NULL || sta->wpa_sm == NULL) 403 return -1; 404 405 m = os_zalloc(sizeof(*m) + data_len); 406 if (m == NULL) 407 return -1; 408 mlen = ((u8 *) &m->u - (u8 *) m) + data_len; 409 m->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 410 WLAN_FC_STYPE_ACTION); 411 os_memcpy(m->da, dst, ETH_ALEN); 412 os_memcpy(m->sa, hapd->own_addr, ETH_ALEN); 413 os_memcpy(m->bssid, hapd->own_addr, ETH_ALEN); 414 os_memcpy(&m->u, data, data_len); 415 416 res = hostapd_drv_send_mlme(hapd, (u8 *) m, mlen, 0); 417 os_free(m); 418 return res; 419 } 420 421 422 static struct wpa_state_machine * 423 hostapd_wpa_auth_add_sta(void *ctx, const u8 *sta_addr) 424 { 425 struct hostapd_data *hapd = ctx; 426 struct sta_info *sta; 427 428 sta = ap_sta_add(hapd, sta_addr); 429 if (sta == NULL) 430 return NULL; 431 if (sta->wpa_sm) { 432 sta->auth_alg = WLAN_AUTH_FT; 433 return sta->wpa_sm; 434 } 435 436 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth, sta->addr); 437 if (sta->wpa_sm == NULL) { 438 ap_free_sta(hapd, sta); 439 return NULL; 440 } 441 sta->auth_alg = WLAN_AUTH_FT; 442 443 return sta->wpa_sm; 444 } 445 446 447 static void hostapd_rrb_receive(void *ctx, const u8 *src_addr, const u8 *buf, 448 size_t len) 449 { 450 struct hostapd_data *hapd = ctx; 451 struct l2_ethhdr *ethhdr; 452 if (len < sizeof(*ethhdr)) 453 return; 454 ethhdr = (struct l2_ethhdr *) buf; 455 wpa_printf(MSG_DEBUG, "FT: RRB received packet " MACSTR " -> " 456 MACSTR, MAC2STR(ethhdr->h_source), MAC2STR(ethhdr->h_dest)); 457 wpa_ft_rrb_rx(hapd->wpa_auth, ethhdr->h_source, buf + sizeof(*ethhdr), 458 len - sizeof(*ethhdr)); 459 } 460 461 #endif /* CONFIG_IEEE80211R */ 462 463 464 int hostapd_setup_wpa(struct hostapd_data *hapd) 465 { 466 struct wpa_auth_config _conf; 467 struct wpa_auth_callbacks cb; 468 const u8 *wpa_ie; 469 size_t wpa_ie_len; 470 471 hostapd_wpa_auth_conf(hapd->conf, &_conf); 472 if (hapd->iface->drv_flags & WPA_DRIVER_FLAGS_EAPOL_TX_STATUS) 473 _conf.tx_status = 1; 474 os_memset(&cb, 0, sizeof(cb)); 475 cb.ctx = hapd; 476 cb.logger = hostapd_wpa_auth_logger; 477 cb.disconnect = hostapd_wpa_auth_disconnect; 478 cb.mic_failure_report = hostapd_wpa_auth_mic_failure_report; 479 cb.set_eapol = hostapd_wpa_auth_set_eapol; 480 cb.get_eapol = hostapd_wpa_auth_get_eapol; 481 cb.get_psk = hostapd_wpa_auth_get_psk; 482 cb.get_msk = hostapd_wpa_auth_get_msk; 483 cb.set_key = hostapd_wpa_auth_set_key; 484 cb.get_seqnum = hostapd_wpa_auth_get_seqnum; 485 cb.send_eapol = hostapd_wpa_auth_send_eapol; 486 cb.for_each_sta = hostapd_wpa_auth_for_each_sta; 487 cb.for_each_auth = hostapd_wpa_auth_for_each_auth; 488 cb.send_ether = hostapd_wpa_auth_send_ether; 489 #ifdef CONFIG_IEEE80211R 490 cb.send_ft_action = hostapd_wpa_auth_send_ft_action; 491 cb.add_sta = hostapd_wpa_auth_add_sta; 492 #endif /* CONFIG_IEEE80211R */ 493 hapd->wpa_auth = wpa_init(hapd->own_addr, &_conf, &cb); 494 if (hapd->wpa_auth == NULL) { 495 wpa_printf(MSG_ERROR, "WPA initialization failed."); 496 return -1; 497 } 498 499 if (hostapd_set_privacy(hapd, 1)) { 500 wpa_printf(MSG_ERROR, "Could not set PrivacyInvoked " 501 "for interface %s", hapd->conf->iface); 502 return -1; 503 } 504 505 wpa_ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &wpa_ie_len); 506 if (hostapd_set_generic_elem(hapd, wpa_ie, wpa_ie_len)) { 507 wpa_printf(MSG_ERROR, "Failed to configure WPA IE for " 508 "the kernel driver."); 509 return -1; 510 } 511 512 if (rsn_preauth_iface_init(hapd)) { 513 wpa_printf(MSG_ERROR, "Initialization of RSN " 514 "pre-authentication failed."); 515 return -1; 516 } 517 518 #ifdef CONFIG_IEEE80211R 519 if (!hostapd_drv_none(hapd)) { 520 hapd->l2 = l2_packet_init(hapd->conf->bridge[0] ? 521 hapd->conf->bridge : 522 hapd->conf->iface, NULL, ETH_P_RRB, 523 hostapd_rrb_receive, hapd, 1); 524 if (hapd->l2 == NULL && 525 (hapd->driver == NULL || 526 hapd->driver->send_ether == NULL)) { 527 wpa_printf(MSG_ERROR, "Failed to open l2_packet " 528 "interface"); 529 return -1; 530 } 531 } 532 #endif /* CONFIG_IEEE80211R */ 533 534 return 0; 535 536 } 537 538 539 void hostapd_reconfig_wpa(struct hostapd_data *hapd) 540 { 541 struct wpa_auth_config wpa_auth_conf; 542 hostapd_wpa_auth_conf(hapd->conf, &wpa_auth_conf); 543 wpa_reconfig(hapd->wpa_auth, &wpa_auth_conf); 544 } 545 546 547 void hostapd_deinit_wpa(struct hostapd_data *hapd) 548 { 549 ieee80211_tkip_countermeasures_deinit(hapd); 550 rsn_preauth_iface_deinit(hapd); 551 if (hapd->wpa_auth) { 552 wpa_deinit(hapd->wpa_auth); 553 hapd->wpa_auth = NULL; 554 555 if (hostapd_set_privacy(hapd, 0)) { 556 wpa_printf(MSG_DEBUG, "Could not disable " 557 "PrivacyInvoked for interface %s", 558 hapd->conf->iface); 559 } 560 561 if (hostapd_set_generic_elem(hapd, (u8 *) "", 0)) { 562 wpa_printf(MSG_DEBUG, "Could not remove generic " 563 "information element from interface %s", 564 hapd->conf->iface); 565 } 566 } 567 ieee802_1x_deinit(hapd); 568 569 #ifdef CONFIG_IEEE80211R 570 l2_packet_deinit(hapd->l2); 571 #endif /* CONFIG_IEEE80211R */ 572 } 573
