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 #ifdef CONFIG_HS20 74 wconf->disable_gtk = conf->disable_dgaf; 75 #endif /* CONFIG_HS20 */ 76 } 77 78 79 static void hostapd_wpa_auth_logger(void *ctx, const u8 *addr, 80 logger_level level, const char *txt) 81 { 82 #ifndef CONFIG_NO_HOSTAPD_LOGGER 83 struct hostapd_data *hapd = ctx; 84 int hlevel; 85 86 switch (level) { 87 case LOGGER_WARNING: 88 hlevel = HOSTAPD_LEVEL_WARNING; 89 break; 90 case LOGGER_INFO: 91 hlevel = HOSTAPD_LEVEL_INFO; 92 break; 93 case LOGGER_DEBUG: 94 default: 95 hlevel = HOSTAPD_LEVEL_DEBUG; 96 break; 97 } 98 99 hostapd_logger(hapd, addr, HOSTAPD_MODULE_WPA, hlevel, "%s", txt); 100 #endif /* CONFIG_NO_HOSTAPD_LOGGER */ 101 } 102 103 104 static void hostapd_wpa_auth_disconnect(void *ctx, const u8 *addr, 105 u16 reason) 106 { 107 struct hostapd_data *hapd = ctx; 108 wpa_printf(MSG_DEBUG, "%s: WPA authenticator requests disconnect: " 109 "STA " MACSTR " reason %d", 110 __func__, MAC2STR(addr), reason); 111 ap_sta_disconnect(hapd, NULL, addr, reason); 112 } 113 114 115 static void hostapd_wpa_auth_mic_failure_report(void *ctx, const u8 *addr) 116 { 117 struct hostapd_data *hapd = ctx; 118 michael_mic_failure(hapd, addr, 0); 119 } 120 121 122 static void hostapd_wpa_auth_set_eapol(void *ctx, const u8 *addr, 123 wpa_eapol_variable var, int value) 124 { 125 struct hostapd_data *hapd = ctx; 126 struct sta_info *sta = ap_get_sta(hapd, addr); 127 if (sta == NULL) 128 return; 129 switch (var) { 130 case WPA_EAPOL_portEnabled: 131 ieee802_1x_notify_port_enabled(sta->eapol_sm, value); 132 break; 133 case WPA_EAPOL_portValid: 134 ieee802_1x_notify_port_valid(sta->eapol_sm, value); 135 break; 136 case WPA_EAPOL_authorized: 137 ieee802_1x_set_sta_authorized(hapd, sta, value); 138 break; 139 case WPA_EAPOL_portControl_Auto: 140 if (sta->eapol_sm) 141 sta->eapol_sm->portControl = Auto; 142 break; 143 case WPA_EAPOL_keyRun: 144 if (sta->eapol_sm) 145 sta->eapol_sm->keyRun = value ? TRUE : FALSE; 146 break; 147 case WPA_EAPOL_keyAvailable: 148 if (sta->eapol_sm) 149 sta->eapol_sm->eap_if->eapKeyAvailable = 150 value ? TRUE : FALSE; 151 break; 152 case WPA_EAPOL_keyDone: 153 if (sta->eapol_sm) 154 sta->eapol_sm->keyDone = value ? TRUE : FALSE; 155 break; 156 case WPA_EAPOL_inc_EapolFramesTx: 157 if (sta->eapol_sm) 158 sta->eapol_sm->dot1xAuthEapolFramesTx++; 159 break; 160 } 161 } 162 163 164 static int hostapd_wpa_auth_get_eapol(void *ctx, const u8 *addr, 165 wpa_eapol_variable var) 166 { 167 struct hostapd_data *hapd = ctx; 168 struct sta_info *sta = ap_get_sta(hapd, addr); 169 if (sta == NULL || sta->eapol_sm == NULL) 170 return -1; 171 switch (var) { 172 case WPA_EAPOL_keyRun: 173 return sta->eapol_sm->keyRun; 174 case WPA_EAPOL_keyAvailable: 175 return sta->eapol_sm->eap_if->eapKeyAvailable; 176 default: 177 return -1; 178 } 179 } 180 181 182 static const u8 * hostapd_wpa_auth_get_psk(void *ctx, const u8 *addr, 183 const u8 *prev_psk) 184 { 185 struct hostapd_data *hapd = ctx; 186 struct sta_info *sta = ap_get_sta(hapd, addr); 187 const u8 *psk = hostapd_get_psk(hapd->conf, addr, prev_psk); 188 /* 189 * This is about to iterate over all psks, prev_psk gives the last 190 * returned psk which should not be returned again. 191 * logic list (all hostapd_get_psk; sta->psk) 192 */ 193 if (sta && sta->psk && !psk && sta->psk != prev_psk) 194 psk = sta->psk; 195 return psk; 196 } 197 198 199 static int hostapd_wpa_auth_get_msk(void *ctx, const u8 *addr, u8 *msk, 200 size_t *len) 201 { 202 struct hostapd_data *hapd = ctx; 203 const u8 *key; 204 size_t keylen; 205 struct sta_info *sta; 206 207 sta = ap_get_sta(hapd, addr); 208 if (sta == NULL) 209 return -1; 210 211 key = ieee802_1x_get_key(sta->eapol_sm, &keylen); 212 if (key == NULL) 213 return -1; 214 215 if (keylen > *len) 216 keylen = *len; 217 os_memcpy(msk, key, keylen); 218 *len = keylen; 219 220 return 0; 221 } 222 223 224 static int hostapd_wpa_auth_set_key(void *ctx, int vlan_id, enum wpa_alg alg, 225 const u8 *addr, int idx, u8 *key, 226 size_t key_len) 227 { 228 struct hostapd_data *hapd = ctx; 229 const char *ifname = hapd->conf->iface; 230 231 if (vlan_id > 0) { 232 ifname = hostapd_get_vlan_id_ifname(hapd->conf->vlan, vlan_id); 233 if (ifname == NULL) 234 return -1; 235 } 236 237 return hostapd_drv_set_key(ifname, hapd, alg, addr, idx, 1, NULL, 0, 238 key, key_len); 239 } 240 241 242 static int hostapd_wpa_auth_get_seqnum(void *ctx, const u8 *addr, int idx, 243 u8 *seq) 244 { 245 struct hostapd_data *hapd = ctx; 246 return hostapd_get_seqnum(hapd->conf->iface, hapd, addr, idx, seq); 247 } 248 249 250 static int hostapd_wpa_auth_send_eapol(void *ctx, const u8 *addr, 251 const u8 *data, size_t data_len, 252 int encrypt) 253 { 254 struct hostapd_data *hapd = ctx; 255 struct sta_info *sta; 256 u32 flags = 0; 257 258 sta = ap_get_sta(hapd, addr); 259 if (sta) 260 flags = hostapd_sta_flags_to_drv(sta->flags); 261 262 return hostapd_drv_hapd_send_eapol(hapd, addr, data, data_len, 263 encrypt, flags); 264 } 265 266 267 static int hostapd_wpa_auth_for_each_sta( 268 void *ctx, int (*cb)(struct wpa_state_machine *sm, void *ctx), 269 void *cb_ctx) 270 { 271 struct hostapd_data *hapd = ctx; 272 struct sta_info *sta; 273 274 for (sta = hapd->sta_list; sta; sta = sta->next) { 275 if (sta->wpa_sm && cb(sta->wpa_sm, cb_ctx)) 276 return 1; 277 } 278 return 0; 279 } 280 281 282 struct wpa_auth_iface_iter_data { 283 int (*cb)(struct wpa_authenticator *sm, void *ctx); 284 void *cb_ctx; 285 }; 286 287 static int wpa_auth_iface_iter(struct hostapd_iface *iface, void *ctx) 288 { 289 struct wpa_auth_iface_iter_data *data = ctx; 290 size_t i; 291 for (i = 0; i < iface->num_bss; i++) { 292 if (iface->bss[i]->wpa_auth && 293 data->cb(iface->bss[i]->wpa_auth, data->cb_ctx)) 294 return 1; 295 } 296 return 0; 297 } 298 299 300 static int hostapd_wpa_auth_for_each_auth( 301 void *ctx, int (*cb)(struct wpa_authenticator *sm, void *ctx), 302 void *cb_ctx) 303 { 304 struct hostapd_data *hapd = ctx; 305 struct wpa_auth_iface_iter_data data; 306 if (hapd->iface->interfaces == NULL || 307 hapd->iface->interfaces->for_each_interface == NULL) 308 return -1; 309 data.cb = cb; 310 data.cb_ctx = cb_ctx; 311 return hapd->iface->interfaces->for_each_interface( 312 hapd->iface->interfaces, wpa_auth_iface_iter, &data); 313 } 314 315 316 #ifdef CONFIG_IEEE80211R 317 318 struct wpa_auth_ft_iface_iter_data { 319 struct hostapd_data *src_hapd; 320 const u8 *dst; 321 const u8 *data; 322 size_t data_len; 323 }; 324 325 326 static int hostapd_wpa_auth_ft_iter(struct hostapd_iface *iface, void *ctx) 327 { 328 struct wpa_auth_ft_iface_iter_data *idata = ctx; 329 struct hostapd_data *hapd; 330 size_t j; 331 332 for (j = 0; j < iface->num_bss; j++) { 333 hapd = iface->bss[j]; 334 if (hapd == idata->src_hapd) 335 continue; 336 if (os_memcmp(hapd->own_addr, idata->dst, ETH_ALEN) == 0) { 337 wpa_printf(MSG_DEBUG, "FT: Send RRB data directly to " 338 "locally managed BSS " MACSTR "@%s -> " 339 MACSTR "@%s", 340 MAC2STR(idata->src_hapd->own_addr), 341 idata->src_hapd->conf->iface, 342 MAC2STR(hapd->own_addr), hapd->conf->iface); 343 wpa_ft_rrb_rx(hapd->wpa_auth, 344 idata->src_hapd->own_addr, 345 idata->data, idata->data_len); 346 return 1; 347 } 348 } 349 350 return 0; 351 } 352 353 #endif /* CONFIG_IEEE80211R */ 354 355 356 static int hostapd_wpa_auth_send_ether(void *ctx, const u8 *dst, u16 proto, 357 const u8 *data, size_t data_len) 358 { 359 struct hostapd_data *hapd = ctx; 360 struct l2_ethhdr *buf; 361 int ret; 362 363 #ifdef CONFIG_IEEE80211R 364 if (proto == ETH_P_RRB && hapd->iface->interfaces && 365 hapd->iface->interfaces->for_each_interface) { 366 int res; 367 struct wpa_auth_ft_iface_iter_data idata; 368 idata.src_hapd = hapd; 369 idata.dst = dst; 370 idata.data = data; 371 idata.data_len = data_len; 372 res = hapd->iface->interfaces->for_each_interface( 373 hapd->iface->interfaces, hostapd_wpa_auth_ft_iter, 374 &idata); 375 if (res == 1) 376 return data_len; 377 } 378 #endif /* CONFIG_IEEE80211R */ 379 380 if (hapd->driver && hapd->driver->send_ether) 381 return hapd->driver->send_ether(hapd->drv_priv, dst, 382 hapd->own_addr, proto, 383 data, data_len); 384 if (hapd->l2 == NULL) 385 return -1; 386 387 buf = os_malloc(sizeof(*buf) + data_len); 388 if (buf == NULL) 389 return -1; 390 os_memcpy(buf->h_dest, dst, ETH_ALEN); 391 os_memcpy(buf->h_source, hapd->own_addr, ETH_ALEN); 392 buf->h_proto = host_to_be16(proto); 393 os_memcpy(buf + 1, data, data_len); 394 ret = l2_packet_send(hapd->l2, dst, proto, (u8 *) buf, 395 sizeof(*buf) + data_len); 396 os_free(buf); 397 return ret; 398 } 399 400 401 #ifdef CONFIG_IEEE80211R 402 403 static int hostapd_wpa_auth_send_ft_action(void *ctx, const u8 *dst, 404 const u8 *data, size_t data_len) 405 { 406 struct hostapd_data *hapd = ctx; 407 int res; 408 struct ieee80211_mgmt *m; 409 size_t mlen; 410 struct sta_info *sta; 411 412 sta = ap_get_sta(hapd, dst); 413 if (sta == NULL || sta->wpa_sm == NULL) 414 return -1; 415 416 m = os_zalloc(sizeof(*m) + data_len); 417 if (m == NULL) 418 return -1; 419 mlen = ((u8 *) &m->u - (u8 *) m) + data_len; 420 m->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 421 WLAN_FC_STYPE_ACTION); 422 os_memcpy(m->da, dst, ETH_ALEN); 423 os_memcpy(m->sa, hapd->own_addr, ETH_ALEN); 424 os_memcpy(m->bssid, hapd->own_addr, ETH_ALEN); 425 os_memcpy(&m->u, data, data_len); 426 427 res = hostapd_drv_send_mlme(hapd, (u8 *) m, mlen, 0); 428 os_free(m); 429 return res; 430 } 431 432 433 static struct wpa_state_machine * 434 hostapd_wpa_auth_add_sta(void *ctx, const u8 *sta_addr) 435 { 436 struct hostapd_data *hapd = ctx; 437 struct sta_info *sta; 438 439 if (hostapd_add_sta_node(hapd, sta_addr, WLAN_AUTH_FT) < 0) 440 return NULL; 441 442 sta = ap_sta_add(hapd, sta_addr); 443 if (sta == NULL) 444 return NULL; 445 if (sta->wpa_sm) { 446 sta->auth_alg = WLAN_AUTH_FT; 447 return sta->wpa_sm; 448 } 449 450 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth, sta->addr); 451 if (sta->wpa_sm == NULL) { 452 ap_free_sta(hapd, sta); 453 return NULL; 454 } 455 sta->auth_alg = WLAN_AUTH_FT; 456 457 return sta->wpa_sm; 458 } 459 460 461 static void hostapd_rrb_receive(void *ctx, const u8 *src_addr, const u8 *buf, 462 size_t len) 463 { 464 struct hostapd_data *hapd = ctx; 465 struct l2_ethhdr *ethhdr; 466 if (len < sizeof(*ethhdr)) 467 return; 468 ethhdr = (struct l2_ethhdr *) buf; 469 wpa_printf(MSG_DEBUG, "FT: RRB received packet " MACSTR " -> " 470 MACSTR, MAC2STR(ethhdr->h_source), MAC2STR(ethhdr->h_dest)); 471 wpa_ft_rrb_rx(hapd->wpa_auth, ethhdr->h_source, buf + sizeof(*ethhdr), 472 len - sizeof(*ethhdr)); 473 } 474 475 476 static int hostapd_wpa_auth_add_tspec(void *ctx, const u8 *sta_addr, 477 u8 *tspec_ie, size_t tspec_ielen) 478 { 479 struct hostapd_data *hapd = ctx; 480 return hostapd_add_tspec(hapd, sta_addr, tspec_ie, tspec_ielen); 481 } 482 483 #endif /* CONFIG_IEEE80211R */ 484 485 486 int hostapd_setup_wpa(struct hostapd_data *hapd) 487 { 488 struct wpa_auth_config _conf; 489 struct wpa_auth_callbacks cb; 490 const u8 *wpa_ie; 491 size_t wpa_ie_len; 492 493 hostapd_wpa_auth_conf(hapd->conf, &_conf); 494 if (hapd->iface->drv_flags & WPA_DRIVER_FLAGS_EAPOL_TX_STATUS) 495 _conf.tx_status = 1; 496 if (hapd->iface->drv_flags & WPA_DRIVER_FLAGS_AP_MLME) 497 _conf.ap_mlme = 1; 498 os_memset(&cb, 0, sizeof(cb)); 499 cb.ctx = hapd; 500 cb.logger = hostapd_wpa_auth_logger; 501 cb.disconnect = hostapd_wpa_auth_disconnect; 502 cb.mic_failure_report = hostapd_wpa_auth_mic_failure_report; 503 cb.set_eapol = hostapd_wpa_auth_set_eapol; 504 cb.get_eapol = hostapd_wpa_auth_get_eapol; 505 cb.get_psk = hostapd_wpa_auth_get_psk; 506 cb.get_msk = hostapd_wpa_auth_get_msk; 507 cb.set_key = hostapd_wpa_auth_set_key; 508 cb.get_seqnum = hostapd_wpa_auth_get_seqnum; 509 cb.send_eapol = hostapd_wpa_auth_send_eapol; 510 cb.for_each_sta = hostapd_wpa_auth_for_each_sta; 511 cb.for_each_auth = hostapd_wpa_auth_for_each_auth; 512 cb.send_ether = hostapd_wpa_auth_send_ether; 513 #ifdef CONFIG_IEEE80211R 514 cb.send_ft_action = hostapd_wpa_auth_send_ft_action; 515 cb.add_sta = hostapd_wpa_auth_add_sta; 516 cb.add_tspec = hostapd_wpa_auth_add_tspec; 517 #endif /* CONFIG_IEEE80211R */ 518 hapd->wpa_auth = wpa_init(hapd->own_addr, &_conf, &cb); 519 if (hapd->wpa_auth == NULL) { 520 wpa_printf(MSG_ERROR, "WPA initialization failed."); 521 return -1; 522 } 523 524 if (hostapd_set_privacy(hapd, 1)) { 525 wpa_printf(MSG_ERROR, "Could not set PrivacyInvoked " 526 "for interface %s", hapd->conf->iface); 527 return -1; 528 } 529 530 wpa_ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &wpa_ie_len); 531 if (hostapd_set_generic_elem(hapd, wpa_ie, wpa_ie_len)) { 532 wpa_printf(MSG_ERROR, "Failed to configure WPA IE for " 533 "the kernel driver."); 534 return -1; 535 } 536 537 if (rsn_preauth_iface_init(hapd)) { 538 wpa_printf(MSG_ERROR, "Initialization of RSN " 539 "pre-authentication failed."); 540 return -1; 541 } 542 543 #ifdef CONFIG_IEEE80211R 544 if (!hostapd_drv_none(hapd)) { 545 hapd->l2 = l2_packet_init(hapd->conf->bridge[0] ? 546 hapd->conf->bridge : 547 hapd->conf->iface, NULL, ETH_P_RRB, 548 hostapd_rrb_receive, hapd, 1); 549 if (hapd->l2 == NULL && 550 (hapd->driver == NULL || 551 hapd->driver->send_ether == NULL)) { 552 wpa_printf(MSG_ERROR, "Failed to open l2_packet " 553 "interface"); 554 return -1; 555 } 556 } 557 #endif /* CONFIG_IEEE80211R */ 558 559 return 0; 560 561 } 562 563 564 void hostapd_reconfig_wpa(struct hostapd_data *hapd) 565 { 566 struct wpa_auth_config wpa_auth_conf; 567 hostapd_wpa_auth_conf(hapd->conf, &wpa_auth_conf); 568 wpa_reconfig(hapd->wpa_auth, &wpa_auth_conf); 569 } 570 571 572 void hostapd_deinit_wpa(struct hostapd_data *hapd) 573 { 574 ieee80211_tkip_countermeasures_deinit(hapd); 575 rsn_preauth_iface_deinit(hapd); 576 if (hapd->wpa_auth) { 577 wpa_deinit(hapd->wpa_auth); 578 hapd->wpa_auth = NULL; 579 580 if (hostapd_set_privacy(hapd, 0)) { 581 wpa_printf(MSG_DEBUG, "Could not disable " 582 "PrivacyInvoked for interface %s", 583 hapd->conf->iface); 584 } 585 586 if (hostapd_set_generic_elem(hapd, (u8 *) "", 0)) { 587 wpa_printf(MSG_DEBUG, "Could not remove generic " 588 "information element from interface %s", 589 hapd->conf->iface); 590 } 591 } 592 ieee802_1x_deinit(hapd); 593 594 #ifdef CONFIG_IEEE80211R 595 l2_packet_deinit(hapd->l2); 596 #endif /* CONFIG_IEEE80211R */ 597 } 598
