1 /* 2 * hostapd / WPA authenticator glue code 3 * Copyright (c) 2002-2012, 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 "utils/eloop.h" 13 #include "utils/list.h" 14 #include "common/ieee802_11_defs.h" 15 #include "common/sae.h" 16 #include "common/wpa_ctrl.h" 17 #include "crypto/sha1.h" 18 #include "eapol_auth/eapol_auth_sm.h" 19 #include "eapol_auth/eapol_auth_sm_i.h" 20 #include "eap_server/eap.h" 21 #include "l2_packet/l2_packet.h" 22 #include "eth_p_oui.h" 23 #include "hostapd.h" 24 #include "ieee802_1x.h" 25 #include "preauth_auth.h" 26 #include "sta_info.h" 27 #include "tkip_countermeasures.h" 28 #include "ap_drv_ops.h" 29 #include "ap_config.h" 30 #include "pmksa_cache_auth.h" 31 #include "wpa_auth.h" 32 #include "wpa_auth_glue.h" 33 34 35 static void hostapd_wpa_auth_conf(struct hostapd_bss_config *conf, 36 struct hostapd_config *iconf, 37 struct wpa_auth_config *wconf) 38 { 39 os_memset(wconf, 0, sizeof(*wconf)); 40 wconf->wpa = conf->wpa; 41 wconf->wpa_key_mgmt = conf->wpa_key_mgmt; 42 wconf->wpa_pairwise = conf->wpa_pairwise; 43 wconf->wpa_group = conf->wpa_group; 44 wconf->wpa_group_rekey = conf->wpa_group_rekey; 45 wconf->wpa_strict_rekey = conf->wpa_strict_rekey; 46 wconf->wpa_gmk_rekey = conf->wpa_gmk_rekey; 47 wconf->wpa_ptk_rekey = conf->wpa_ptk_rekey; 48 wconf->wpa_group_update_count = conf->wpa_group_update_count; 49 wconf->wpa_disable_eapol_key_retries = 50 conf->wpa_disable_eapol_key_retries; 51 wconf->wpa_pairwise_update_count = conf->wpa_pairwise_update_count; 52 wconf->rsn_pairwise = conf->rsn_pairwise; 53 wconf->rsn_preauth = conf->rsn_preauth; 54 wconf->eapol_version = conf->eapol_version; 55 wconf->wmm_enabled = conf->wmm_enabled; 56 wconf->wmm_uapsd = conf->wmm_uapsd; 57 wconf->disable_pmksa_caching = conf->disable_pmksa_caching; 58 wconf->okc = conf->okc; 59 #ifdef CONFIG_IEEE80211W 60 wconf->ieee80211w = conf->ieee80211w; 61 wconf->group_mgmt_cipher = conf->group_mgmt_cipher; 62 #endif /* CONFIG_IEEE80211W */ 63 #ifdef CONFIG_IEEE80211R_AP 64 wconf->ssid_len = conf->ssid.ssid_len; 65 if (wconf->ssid_len > SSID_MAX_LEN) 66 wconf->ssid_len = SSID_MAX_LEN; 67 os_memcpy(wconf->ssid, conf->ssid.ssid, wconf->ssid_len); 68 os_memcpy(wconf->mobility_domain, conf->mobility_domain, 69 MOBILITY_DOMAIN_ID_LEN); 70 if (conf->nas_identifier && 71 os_strlen(conf->nas_identifier) <= FT_R0KH_ID_MAX_LEN) { 72 wconf->r0_key_holder_len = os_strlen(conf->nas_identifier); 73 os_memcpy(wconf->r0_key_holder, conf->nas_identifier, 74 wconf->r0_key_holder_len); 75 } 76 os_memcpy(wconf->r1_key_holder, conf->r1_key_holder, FT_R1KH_ID_LEN); 77 wconf->r0_key_lifetime = conf->r0_key_lifetime; 78 wconf->reassociation_deadline = conf->reassociation_deadline; 79 wconf->rkh_pos_timeout = conf->rkh_pos_timeout; 80 wconf->rkh_neg_timeout = conf->rkh_neg_timeout; 81 wconf->rkh_pull_timeout = conf->rkh_pull_timeout; 82 wconf->rkh_pull_retries = conf->rkh_pull_retries; 83 wconf->r0kh_list = &conf->r0kh_list; 84 wconf->r1kh_list = &conf->r1kh_list; 85 wconf->pmk_r1_push = conf->pmk_r1_push; 86 wconf->ft_over_ds = conf->ft_over_ds; 87 wconf->ft_psk_generate_local = conf->ft_psk_generate_local; 88 #endif /* CONFIG_IEEE80211R_AP */ 89 #ifdef CONFIG_HS20 90 wconf->disable_gtk = conf->disable_dgaf; 91 if (conf->osen) { 92 wconf->disable_gtk = 1; 93 wconf->wpa = WPA_PROTO_OSEN; 94 wconf->wpa_key_mgmt = WPA_KEY_MGMT_OSEN; 95 wconf->wpa_pairwise = 0; 96 wconf->wpa_group = WPA_CIPHER_CCMP; 97 wconf->rsn_pairwise = WPA_CIPHER_CCMP; 98 wconf->rsn_preauth = 0; 99 wconf->disable_pmksa_caching = 1; 100 #ifdef CONFIG_IEEE80211W 101 wconf->ieee80211w = 1; 102 #endif /* CONFIG_IEEE80211W */ 103 } 104 #endif /* CONFIG_HS20 */ 105 #ifdef CONFIG_TESTING_OPTIONS 106 wconf->corrupt_gtk_rekey_mic_probability = 107 iconf->corrupt_gtk_rekey_mic_probability; 108 if (conf->own_ie_override && 109 wpabuf_len(conf->own_ie_override) <= MAX_OWN_IE_OVERRIDE) { 110 wconf->own_ie_override_len = wpabuf_len(conf->own_ie_override); 111 os_memcpy(wconf->own_ie_override, 112 wpabuf_head(conf->own_ie_override), 113 wconf->own_ie_override_len); 114 } 115 #endif /* CONFIG_TESTING_OPTIONS */ 116 #ifdef CONFIG_P2P 117 os_memcpy(wconf->ip_addr_go, conf->ip_addr_go, 4); 118 os_memcpy(wconf->ip_addr_mask, conf->ip_addr_mask, 4); 119 os_memcpy(wconf->ip_addr_start, conf->ip_addr_start, 4); 120 os_memcpy(wconf->ip_addr_end, conf->ip_addr_end, 4); 121 #endif /* CONFIG_P2P */ 122 #ifdef CONFIG_FILS 123 wconf->fils_cache_id_set = conf->fils_cache_id_set; 124 os_memcpy(wconf->fils_cache_id, conf->fils_cache_id, 125 FILS_CACHE_ID_LEN); 126 #endif /* CONFIG_FILS */ 127 } 128 129 130 static void hostapd_wpa_auth_logger(void *ctx, const u8 *addr, 131 logger_level level, const char *txt) 132 { 133 #ifndef CONFIG_NO_HOSTAPD_LOGGER 134 struct hostapd_data *hapd = ctx; 135 int hlevel; 136 137 switch (level) { 138 case LOGGER_WARNING: 139 hlevel = HOSTAPD_LEVEL_WARNING; 140 break; 141 case LOGGER_INFO: 142 hlevel = HOSTAPD_LEVEL_INFO; 143 break; 144 case LOGGER_DEBUG: 145 default: 146 hlevel = HOSTAPD_LEVEL_DEBUG; 147 break; 148 } 149 150 hostapd_logger(hapd, addr, HOSTAPD_MODULE_WPA, hlevel, "%s", txt); 151 #endif /* CONFIG_NO_HOSTAPD_LOGGER */ 152 } 153 154 155 static void hostapd_wpa_auth_disconnect(void *ctx, const u8 *addr, 156 u16 reason) 157 { 158 struct hostapd_data *hapd = ctx; 159 wpa_printf(MSG_DEBUG, "%s: WPA authenticator requests disconnect: " 160 "STA " MACSTR " reason %d", 161 __func__, MAC2STR(addr), reason); 162 ap_sta_disconnect(hapd, NULL, addr, reason); 163 } 164 165 166 static int hostapd_wpa_auth_mic_failure_report(void *ctx, const u8 *addr) 167 { 168 struct hostapd_data *hapd = ctx; 169 return michael_mic_failure(hapd, addr, 0); 170 } 171 172 173 static void hostapd_wpa_auth_psk_failure_report(void *ctx, const u8 *addr) 174 { 175 struct hostapd_data *hapd = ctx; 176 wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_POSSIBLE_PSK_MISMATCH MACSTR, 177 MAC2STR(addr)); 178 } 179 180 181 static void hostapd_wpa_auth_set_eapol(void *ctx, const u8 *addr, 182 wpa_eapol_variable var, int value) 183 { 184 struct hostapd_data *hapd = ctx; 185 struct sta_info *sta = ap_get_sta(hapd, addr); 186 if (sta == NULL) 187 return; 188 switch (var) { 189 case WPA_EAPOL_portEnabled: 190 ieee802_1x_notify_port_enabled(sta->eapol_sm, value); 191 break; 192 case WPA_EAPOL_portValid: 193 ieee802_1x_notify_port_valid(sta->eapol_sm, value); 194 break; 195 case WPA_EAPOL_authorized: 196 ieee802_1x_set_sta_authorized(hapd, sta, value); 197 break; 198 case WPA_EAPOL_portControl_Auto: 199 if (sta->eapol_sm) 200 sta->eapol_sm->portControl = Auto; 201 break; 202 case WPA_EAPOL_keyRun: 203 if (sta->eapol_sm) 204 sta->eapol_sm->keyRun = value ? TRUE : FALSE; 205 break; 206 case WPA_EAPOL_keyAvailable: 207 if (sta->eapol_sm) 208 sta->eapol_sm->eap_if->eapKeyAvailable = 209 value ? TRUE : FALSE; 210 break; 211 case WPA_EAPOL_keyDone: 212 if (sta->eapol_sm) 213 sta->eapol_sm->keyDone = value ? TRUE : FALSE; 214 break; 215 case WPA_EAPOL_inc_EapolFramesTx: 216 if (sta->eapol_sm) 217 sta->eapol_sm->dot1xAuthEapolFramesTx++; 218 break; 219 } 220 } 221 222 223 static int hostapd_wpa_auth_get_eapol(void *ctx, const u8 *addr, 224 wpa_eapol_variable var) 225 { 226 struct hostapd_data *hapd = ctx; 227 struct sta_info *sta = ap_get_sta(hapd, addr); 228 if (sta == NULL || sta->eapol_sm == NULL) 229 return -1; 230 switch (var) { 231 case WPA_EAPOL_keyRun: 232 return sta->eapol_sm->keyRun; 233 case WPA_EAPOL_keyAvailable: 234 return sta->eapol_sm->eap_if->eapKeyAvailable; 235 default: 236 return -1; 237 } 238 } 239 240 241 static const u8 * hostapd_wpa_auth_get_psk(void *ctx, const u8 *addr, 242 const u8 *p2p_dev_addr, 243 const u8 *prev_psk, size_t *psk_len) 244 { 245 struct hostapd_data *hapd = ctx; 246 struct sta_info *sta = ap_get_sta(hapd, addr); 247 const u8 *psk; 248 249 if (psk_len) 250 *psk_len = PMK_LEN; 251 252 #ifdef CONFIG_SAE 253 if (sta && sta->auth_alg == WLAN_AUTH_SAE) { 254 if (!sta->sae || prev_psk) 255 return NULL; 256 return sta->sae->pmk; 257 } 258 if (sta && wpa_auth_uses_sae(sta->wpa_sm)) { 259 wpa_printf(MSG_DEBUG, 260 "No PSK for STA trying to use SAE with PMKSA caching"); 261 return NULL; 262 } 263 #endif /* CONFIG_SAE */ 264 265 #ifdef CONFIG_OWE 266 if ((hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_OWE) && 267 sta && sta->owe_pmk) { 268 if (psk_len) 269 *psk_len = sta->owe_pmk_len; 270 return sta->owe_pmk; 271 } 272 if ((hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_OWE) && sta) { 273 struct rsn_pmksa_cache_entry *sa; 274 275 sa = wpa_auth_sta_get_pmksa(sta->wpa_sm); 276 if (sa && sa->akmp == WPA_KEY_MGMT_OWE) { 277 if (psk_len) 278 *psk_len = sa->pmk_len; 279 return sa->pmk; 280 } 281 } 282 #endif /* CONFIG_OWE */ 283 284 psk = hostapd_get_psk(hapd->conf, addr, p2p_dev_addr, prev_psk); 285 /* 286 * This is about to iterate over all psks, prev_psk gives the last 287 * returned psk which should not be returned again. 288 * logic list (all hostapd_get_psk; all sta->psk) 289 */ 290 if (sta && sta->psk && !psk) { 291 struct hostapd_sta_wpa_psk_short *pos; 292 psk = sta->psk->psk; 293 for (pos = sta->psk; pos; pos = pos->next) { 294 if (pos->is_passphrase) { 295 pbkdf2_sha1(pos->passphrase, 296 hapd->conf->ssid.ssid, 297 hapd->conf->ssid.ssid_len, 4096, 298 pos->psk, PMK_LEN); 299 pos->is_passphrase = 0; 300 } 301 if (pos->psk == prev_psk) { 302 psk = pos->next ? pos->next->psk : NULL; 303 break; 304 } 305 } 306 } 307 return psk; 308 } 309 310 311 static int hostapd_wpa_auth_get_msk(void *ctx, const u8 *addr, u8 *msk, 312 size_t *len) 313 { 314 struct hostapd_data *hapd = ctx; 315 const u8 *key; 316 size_t keylen; 317 struct sta_info *sta; 318 319 sta = ap_get_sta(hapd, addr); 320 if (sta == NULL) { 321 wpa_printf(MSG_DEBUG, "AUTH_GET_MSK: Cannot find STA"); 322 return -1; 323 } 324 325 key = ieee802_1x_get_key(sta->eapol_sm, &keylen); 326 if (key == NULL) { 327 wpa_printf(MSG_DEBUG, "AUTH_GET_MSK: Key is null, eapol_sm: %p", 328 sta->eapol_sm); 329 return -1; 330 } 331 332 if (keylen > *len) 333 keylen = *len; 334 os_memcpy(msk, key, keylen); 335 *len = keylen; 336 337 return 0; 338 } 339 340 341 static int hostapd_wpa_auth_set_key(void *ctx, int vlan_id, enum wpa_alg alg, 342 const u8 *addr, int idx, u8 *key, 343 size_t key_len) 344 { 345 struct hostapd_data *hapd = ctx; 346 const char *ifname = hapd->conf->iface; 347 348 if (vlan_id > 0) { 349 ifname = hostapd_get_vlan_id_ifname(hapd->conf->vlan, vlan_id); 350 if (ifname == NULL) 351 return -1; 352 } 353 354 #ifdef CONFIG_TESTING_OPTIONS 355 if (addr && !is_broadcast_ether_addr(addr)) { 356 struct sta_info *sta; 357 358 sta = ap_get_sta(hapd, addr); 359 if (sta) { 360 sta->last_tk_alg = alg; 361 sta->last_tk_key_idx = idx; 362 if (key) 363 os_memcpy(sta->last_tk, key, key_len); 364 sta->last_tk_len = key_len; 365 } 366 #ifdef CONFIG_IEEE80211W 367 } else if (alg == WPA_CIPHER_AES_128_CMAC || 368 alg == WPA_CIPHER_BIP_GMAC_128 || 369 alg == WPA_CIPHER_BIP_GMAC_256 || 370 alg == WPA_CIPHER_BIP_CMAC_256) { 371 hapd->last_igtk_alg = alg; 372 hapd->last_igtk_key_idx = idx; 373 if (key) 374 os_memcpy(hapd->last_igtk, key, key_len); 375 hapd->last_igtk_len = key_len; 376 #endif /* CONFIG_IEEE80211W */ 377 } else { 378 hapd->last_gtk_alg = alg; 379 hapd->last_gtk_key_idx = idx; 380 if (key) 381 os_memcpy(hapd->last_gtk, key, key_len); 382 hapd->last_gtk_len = key_len; 383 } 384 #endif /* CONFIG_TESTING_OPTIONS */ 385 return hostapd_drv_set_key(ifname, hapd, alg, addr, idx, 1, NULL, 0, 386 key, key_len); 387 } 388 389 390 static int hostapd_wpa_auth_get_seqnum(void *ctx, const u8 *addr, int idx, 391 u8 *seq) 392 { 393 struct hostapd_data *hapd = ctx; 394 return hostapd_get_seqnum(hapd->conf->iface, hapd, addr, idx, seq); 395 } 396 397 398 static int hostapd_wpa_auth_send_eapol(void *ctx, const u8 *addr, 399 const u8 *data, size_t data_len, 400 int encrypt) 401 { 402 struct hostapd_data *hapd = ctx; 403 struct sta_info *sta; 404 u32 flags = 0; 405 406 #ifdef CONFIG_TESTING_OPTIONS 407 if (hapd->ext_eapol_frame_io) { 408 size_t hex_len = 2 * data_len + 1; 409 char *hex = os_malloc(hex_len); 410 411 if (hex == NULL) 412 return -1; 413 wpa_snprintf_hex(hex, hex_len, data, data_len); 414 wpa_msg(hapd->msg_ctx, MSG_INFO, "EAPOL-TX " MACSTR " %s", 415 MAC2STR(addr), hex); 416 os_free(hex); 417 return 0; 418 } 419 #endif /* CONFIG_TESTING_OPTIONS */ 420 421 sta = ap_get_sta(hapd, addr); 422 if (sta) 423 flags = hostapd_sta_flags_to_drv(sta->flags); 424 425 return hostapd_drv_hapd_send_eapol(hapd, addr, data, data_len, 426 encrypt, flags); 427 } 428 429 430 static int hostapd_wpa_auth_for_each_sta( 431 void *ctx, int (*cb)(struct wpa_state_machine *sm, void *ctx), 432 void *cb_ctx) 433 { 434 struct hostapd_data *hapd = ctx; 435 struct sta_info *sta; 436 437 for (sta = hapd->sta_list; sta; sta = sta->next) { 438 if (sta->wpa_sm && cb(sta->wpa_sm, cb_ctx)) 439 return 1; 440 } 441 return 0; 442 } 443 444 445 struct wpa_auth_iface_iter_data { 446 int (*cb)(struct wpa_authenticator *sm, void *ctx); 447 void *cb_ctx; 448 }; 449 450 static int wpa_auth_iface_iter(struct hostapd_iface *iface, void *ctx) 451 { 452 struct wpa_auth_iface_iter_data *data = ctx; 453 size_t i; 454 for (i = 0; i < iface->num_bss; i++) { 455 if (iface->bss[i]->wpa_auth && 456 data->cb(iface->bss[i]->wpa_auth, data->cb_ctx)) 457 return 1; 458 } 459 return 0; 460 } 461 462 463 static int hostapd_wpa_auth_for_each_auth( 464 void *ctx, int (*cb)(struct wpa_authenticator *sm, void *ctx), 465 void *cb_ctx) 466 { 467 struct hostapd_data *hapd = ctx; 468 struct wpa_auth_iface_iter_data data; 469 if (hapd->iface->interfaces == NULL || 470 hapd->iface->interfaces->for_each_interface == NULL) 471 return -1; 472 data.cb = cb; 473 data.cb_ctx = cb_ctx; 474 return hapd->iface->interfaces->for_each_interface( 475 hapd->iface->interfaces, wpa_auth_iface_iter, &data); 476 } 477 478 479 #ifdef CONFIG_IEEE80211R_AP 480 481 struct wpa_ft_rrb_rx_later_data { 482 struct dl_list list; 483 u8 addr[ETH_ALEN]; 484 size_t data_len; 485 /* followed by data_len octets of data */ 486 }; 487 488 static void hostapd_wpa_ft_rrb_rx_later(void *eloop_ctx, void *timeout_ctx) 489 { 490 struct hostapd_data *hapd = eloop_ctx; 491 struct wpa_ft_rrb_rx_later_data *data, *n; 492 493 dl_list_for_each_safe(data, n, &hapd->l2_queue, 494 struct wpa_ft_rrb_rx_later_data, list) { 495 if (hapd->wpa_auth) { 496 wpa_ft_rrb_rx(hapd->wpa_auth, data->addr, 497 (const u8 *) (data + 1), 498 data->data_len); 499 } 500 dl_list_del(&data->list); 501 os_free(data); 502 } 503 } 504 505 506 struct wpa_auth_ft_iface_iter_data { 507 struct hostapd_data *src_hapd; 508 const u8 *dst; 509 const u8 *data; 510 size_t data_len; 511 }; 512 513 514 static int hostapd_wpa_auth_ft_iter(struct hostapd_iface *iface, void *ctx) 515 { 516 struct wpa_auth_ft_iface_iter_data *idata = ctx; 517 struct wpa_ft_rrb_rx_later_data *data; 518 struct hostapd_data *hapd; 519 size_t j; 520 521 for (j = 0; j < iface->num_bss; j++) { 522 hapd = iface->bss[j]; 523 if (hapd == idata->src_hapd || 524 !hapd->wpa_auth || 525 os_memcmp(hapd->own_addr, idata->dst, ETH_ALEN) != 0) 526 continue; 527 528 wpa_printf(MSG_DEBUG, 529 "FT: Send RRB data directly to locally managed BSS " 530 MACSTR "@%s -> " MACSTR "@%s", 531 MAC2STR(idata->src_hapd->own_addr), 532 idata->src_hapd->conf->iface, 533 MAC2STR(hapd->own_addr), hapd->conf->iface); 534 535 /* Defer wpa_ft_rrb_rx() until next eloop step as this is 536 * when it would be triggered when reading from a socket. 537 * This avoids 538 * hapd0:send -> hapd1:recv -> hapd1:send -> hapd0:recv, 539 * that is calling hapd0:recv handler from within 540 * hapd0:send directly. 541 */ 542 data = os_zalloc(sizeof(*data) + idata->data_len); 543 if (!data) 544 return 1; 545 546 os_memcpy(data->addr, idata->src_hapd->own_addr, ETH_ALEN); 547 os_memcpy(data + 1, idata->data, idata->data_len); 548 data->data_len = idata->data_len; 549 550 dl_list_add(&hapd->l2_queue, &data->list); 551 552 if (!eloop_is_timeout_registered(hostapd_wpa_ft_rrb_rx_later, 553 hapd, NULL)) 554 eloop_register_timeout(0, 0, 555 hostapd_wpa_ft_rrb_rx_later, 556 hapd, NULL); 557 558 return 1; 559 } 560 561 return 0; 562 } 563 564 #endif /* CONFIG_IEEE80211R_AP */ 565 566 567 static int hostapd_wpa_auth_send_ether(void *ctx, const u8 *dst, u16 proto, 568 const u8 *data, size_t data_len) 569 { 570 struct hostapd_data *hapd = ctx; 571 struct l2_ethhdr *buf; 572 int ret; 573 574 #ifdef CONFIG_TESTING_OPTIONS 575 if (hapd->ext_eapol_frame_io && proto == ETH_P_EAPOL) { 576 size_t hex_len = 2 * data_len + 1; 577 char *hex = os_malloc(hex_len); 578 579 if (hex == NULL) 580 return -1; 581 wpa_snprintf_hex(hex, hex_len, data, data_len); 582 wpa_msg(hapd->msg_ctx, MSG_INFO, "EAPOL-TX " MACSTR " %s", 583 MAC2STR(dst), hex); 584 os_free(hex); 585 return 0; 586 } 587 #endif /* CONFIG_TESTING_OPTIONS */ 588 589 #ifdef CONFIG_IEEE80211R_AP 590 if (proto == ETH_P_RRB && hapd->iface->interfaces && 591 hapd->iface->interfaces->for_each_interface) { 592 int res; 593 struct wpa_auth_ft_iface_iter_data idata; 594 idata.src_hapd = hapd; 595 idata.dst = dst; 596 idata.data = data; 597 idata.data_len = data_len; 598 res = hapd->iface->interfaces->for_each_interface( 599 hapd->iface->interfaces, hostapd_wpa_auth_ft_iter, 600 &idata); 601 if (res == 1) 602 return data_len; 603 } 604 #endif /* CONFIG_IEEE80211R_AP */ 605 606 if (hapd->driver && hapd->driver->send_ether) 607 return hapd->driver->send_ether(hapd->drv_priv, dst, 608 hapd->own_addr, proto, 609 data, data_len); 610 if (hapd->l2 == NULL) 611 return -1; 612 613 buf = os_malloc(sizeof(*buf) + data_len); 614 if (buf == NULL) 615 return -1; 616 os_memcpy(buf->h_dest, dst, ETH_ALEN); 617 os_memcpy(buf->h_source, hapd->own_addr, ETH_ALEN); 618 buf->h_proto = host_to_be16(proto); 619 os_memcpy(buf + 1, data, data_len); 620 ret = l2_packet_send(hapd->l2, dst, proto, (u8 *) buf, 621 sizeof(*buf) + data_len); 622 os_free(buf); 623 return ret; 624 } 625 626 627 #ifdef CONFIG_ETH_P_OUI 628 static struct eth_p_oui_ctx * hostapd_wpa_get_oui(struct hostapd_data *hapd, 629 u8 oui_suffix) 630 { 631 switch (oui_suffix) { 632 #ifdef CONFIG_IEEE80211R_AP 633 case FT_PACKET_R0KH_R1KH_PULL: 634 return hapd->oui_pull; 635 case FT_PACKET_R0KH_R1KH_RESP: 636 return hapd->oui_resp; 637 case FT_PACKET_R0KH_R1KH_PUSH: 638 return hapd->oui_push; 639 case FT_PACKET_R0KH_R1KH_SEQ_REQ: 640 return hapd->oui_sreq; 641 case FT_PACKET_R0KH_R1KH_SEQ_RESP: 642 return hapd->oui_sresp; 643 #endif /* CONFIG_IEEE80211R_AP */ 644 default: 645 return NULL; 646 } 647 } 648 #endif /* CONFIG_ETH_P_OUI */ 649 650 651 #ifdef CONFIG_IEEE80211R_AP 652 653 struct oui_deliver_later_data { 654 struct dl_list list; 655 u8 src_addr[ETH_ALEN]; 656 u8 dst_addr[ETH_ALEN]; 657 size_t data_len; 658 u8 oui_suffix; 659 /* followed by data_len octets of data */ 660 }; 661 662 static void hostapd_oui_deliver_later(void *eloop_ctx, void *timeout_ctx) 663 { 664 struct hostapd_data *hapd = eloop_ctx; 665 struct oui_deliver_later_data *data, *n; 666 struct eth_p_oui_ctx *oui_ctx; 667 668 dl_list_for_each_safe(data, n, &hapd->l2_oui_queue, 669 struct oui_deliver_later_data, list) { 670 oui_ctx = hostapd_wpa_get_oui(hapd, data->oui_suffix); 671 if (hapd->wpa_auth && oui_ctx) { 672 eth_p_oui_deliver(oui_ctx, data->src_addr, 673 data->dst_addr, 674 (const u8 *) (data + 1), 675 data->data_len); 676 } 677 dl_list_del(&data->list); 678 os_free(data); 679 } 680 } 681 682 683 struct wpa_auth_oui_iface_iter_data { 684 struct hostapd_data *src_hapd; 685 const u8 *dst_addr; 686 const u8 *data; 687 size_t data_len; 688 u8 oui_suffix; 689 }; 690 691 static int hostapd_wpa_auth_oui_iter(struct hostapd_iface *iface, void *ctx) 692 { 693 struct wpa_auth_oui_iface_iter_data *idata = ctx; 694 struct oui_deliver_later_data *data; 695 struct hostapd_data *hapd; 696 size_t j; 697 698 for (j = 0; j < iface->num_bss; j++) { 699 hapd = iface->bss[j]; 700 if (hapd == idata->src_hapd) 701 continue; 702 if (!is_multicast_ether_addr(idata->dst_addr) && 703 os_memcmp(hapd->own_addr, idata->dst_addr, ETH_ALEN) != 0) 704 continue; 705 706 /* defer eth_p_oui_deliver until next eloop step as this is 707 * when it would be triggerd from reading from sock 708 * This avoids 709 * hapd0:send -> hapd1:recv -> hapd1:send -> hapd0:recv, 710 * that is calling hapd0:recv handler from within 711 * hapd0:send directly. 712 */ 713 data = os_zalloc(sizeof(*data) + idata->data_len); 714 if (!data) 715 return 1; 716 717 os_memcpy(data->src_addr, idata->src_hapd->own_addr, ETH_ALEN); 718 os_memcpy(data->dst_addr, idata->dst_addr, ETH_ALEN); 719 os_memcpy(data + 1, idata->data, idata->data_len); 720 data->data_len = idata->data_len; 721 data->oui_suffix = idata->oui_suffix; 722 723 dl_list_add(&hapd->l2_oui_queue, &data->list); 724 725 if (!eloop_is_timeout_registered(hostapd_oui_deliver_later, 726 hapd, NULL)) 727 eloop_register_timeout(0, 0, 728 hostapd_oui_deliver_later, 729 hapd, NULL); 730 731 return 1; 732 } 733 734 return 0; 735 } 736 737 #endif /* CONFIG_IEEE80211R_AP */ 738 739 740 static int hostapd_wpa_auth_send_oui(void *ctx, const u8 *dst, u8 oui_suffix, 741 const u8 *data, size_t data_len) 742 { 743 #ifdef CONFIG_ETH_P_OUI 744 struct hostapd_data *hapd = ctx; 745 struct eth_p_oui_ctx *oui_ctx; 746 747 #ifdef CONFIG_IEEE80211R_AP 748 if (hapd->iface->interfaces && 749 hapd->iface->interfaces->for_each_interface) { 750 struct wpa_auth_oui_iface_iter_data idata; 751 int res; 752 753 idata.src_hapd = hapd; 754 idata.dst_addr = dst; 755 idata.data = data; 756 idata.data_len = data_len; 757 idata.oui_suffix = oui_suffix; 758 res = hapd->iface->interfaces->for_each_interface( 759 hapd->iface->interfaces, hostapd_wpa_auth_oui_iter, 760 &idata); 761 if (res == 1) 762 return data_len; 763 } 764 #endif /* CONFIG_IEEE80211R_AP */ 765 766 oui_ctx = hostapd_wpa_get_oui(hapd, oui_suffix); 767 if (!oui_ctx) 768 return -1; 769 770 return eth_p_oui_send(oui_ctx, hapd->own_addr, dst, data, data_len); 771 #else /* CONFIG_ETH_P_OUI */ 772 return -1; 773 #endif /* CONFIG_ETH_P_OUI */ 774 } 775 776 777 #ifdef CONFIG_IEEE80211R_AP 778 779 static int hostapd_wpa_auth_send_ft_action(void *ctx, const u8 *dst, 780 const u8 *data, size_t data_len) 781 { 782 struct hostapd_data *hapd = ctx; 783 int res; 784 struct ieee80211_mgmt *m; 785 size_t mlen; 786 struct sta_info *sta; 787 788 sta = ap_get_sta(hapd, dst); 789 if (sta == NULL || sta->wpa_sm == NULL) 790 return -1; 791 792 m = os_zalloc(sizeof(*m) + data_len); 793 if (m == NULL) 794 return -1; 795 mlen = ((u8 *) &m->u - (u8 *) m) + data_len; 796 m->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 797 WLAN_FC_STYPE_ACTION); 798 os_memcpy(m->da, dst, ETH_ALEN); 799 os_memcpy(m->sa, hapd->own_addr, ETH_ALEN); 800 os_memcpy(m->bssid, hapd->own_addr, ETH_ALEN); 801 os_memcpy(&m->u, data, data_len); 802 803 res = hostapd_drv_send_mlme(hapd, (u8 *) m, mlen, 0); 804 os_free(m); 805 return res; 806 } 807 808 809 static struct wpa_state_machine * 810 hostapd_wpa_auth_add_sta(void *ctx, const u8 *sta_addr) 811 { 812 struct hostapd_data *hapd = ctx; 813 struct sta_info *sta; 814 815 if (hostapd_add_sta_node(hapd, sta_addr, WLAN_AUTH_FT) < 0) 816 return NULL; 817 818 sta = ap_sta_add(hapd, sta_addr); 819 if (sta == NULL) 820 return NULL; 821 if (sta->wpa_sm) { 822 sta->auth_alg = WLAN_AUTH_FT; 823 return sta->wpa_sm; 824 } 825 826 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth, sta->addr, NULL); 827 if (sta->wpa_sm == NULL) { 828 ap_free_sta(hapd, sta); 829 return NULL; 830 } 831 sta->auth_alg = WLAN_AUTH_FT; 832 833 return sta->wpa_sm; 834 } 835 836 837 static void hostapd_rrb_receive(void *ctx, const u8 *src_addr, const u8 *buf, 838 size_t len) 839 { 840 struct hostapd_data *hapd = ctx; 841 struct l2_ethhdr *ethhdr; 842 if (len < sizeof(*ethhdr)) 843 return; 844 ethhdr = (struct l2_ethhdr *) buf; 845 wpa_printf(MSG_DEBUG, "FT: RRB received packet " MACSTR " -> " 846 MACSTR, MAC2STR(ethhdr->h_source), MAC2STR(ethhdr->h_dest)); 847 if (!is_multicast_ether_addr(ethhdr->h_dest) && 848 os_memcmp(hapd->own_addr, ethhdr->h_dest, ETH_ALEN) != 0) 849 return; 850 wpa_ft_rrb_rx(hapd->wpa_auth, ethhdr->h_source, buf + sizeof(*ethhdr), 851 len - sizeof(*ethhdr)); 852 } 853 854 855 static void hostapd_rrb_oui_receive(void *ctx, const u8 *src_addr, 856 const u8 *dst_addr, u8 oui_suffix, 857 const u8 *buf, size_t len) 858 { 859 struct hostapd_data *hapd = ctx; 860 861 wpa_printf(MSG_DEBUG, "FT: RRB received packet " MACSTR " -> " 862 MACSTR, MAC2STR(src_addr), MAC2STR(dst_addr)); 863 if (!is_multicast_ether_addr(dst_addr) && 864 os_memcmp(hapd->own_addr, dst_addr, ETH_ALEN) != 0) 865 return; 866 wpa_ft_rrb_oui_rx(hapd->wpa_auth, src_addr, dst_addr, oui_suffix, buf, 867 len); 868 } 869 870 871 static int hostapd_wpa_auth_add_tspec(void *ctx, const u8 *sta_addr, 872 u8 *tspec_ie, size_t tspec_ielen) 873 { 874 struct hostapd_data *hapd = ctx; 875 return hostapd_add_tspec(hapd, sta_addr, tspec_ie, tspec_ielen); 876 } 877 878 879 880 static int hostapd_wpa_register_ft_oui(struct hostapd_data *hapd, 881 const char *ft_iface) 882 { 883 hapd->oui_pull = eth_p_oui_register(hapd, ft_iface, 884 FT_PACKET_R0KH_R1KH_PULL, 885 hostapd_rrb_oui_receive, hapd); 886 if (!hapd->oui_pull) 887 return -1; 888 889 hapd->oui_resp = eth_p_oui_register(hapd, ft_iface, 890 FT_PACKET_R0KH_R1KH_RESP, 891 hostapd_rrb_oui_receive, hapd); 892 if (!hapd->oui_resp) 893 return -1; 894 895 hapd->oui_push = eth_p_oui_register(hapd, ft_iface, 896 FT_PACKET_R0KH_R1KH_PUSH, 897 hostapd_rrb_oui_receive, hapd); 898 if (!hapd->oui_push) 899 return -1; 900 901 hapd->oui_sreq = eth_p_oui_register(hapd, ft_iface, 902 FT_PACKET_R0KH_R1KH_SEQ_REQ, 903 hostapd_rrb_oui_receive, hapd); 904 if (!hapd->oui_sreq) 905 return -1; 906 907 hapd->oui_sresp = eth_p_oui_register(hapd, ft_iface, 908 FT_PACKET_R0KH_R1KH_SEQ_RESP, 909 hostapd_rrb_oui_receive, hapd); 910 if (!hapd->oui_sresp) 911 return -1; 912 913 return 0; 914 } 915 916 917 static void hostapd_wpa_unregister_ft_oui(struct hostapd_data *hapd) 918 { 919 eth_p_oui_unregister(hapd->oui_pull); 920 hapd->oui_pull = NULL; 921 eth_p_oui_unregister(hapd->oui_resp); 922 hapd->oui_resp = NULL; 923 eth_p_oui_unregister(hapd->oui_push); 924 hapd->oui_push = NULL; 925 eth_p_oui_unregister(hapd->oui_sreq); 926 hapd->oui_sreq = NULL; 927 eth_p_oui_unregister(hapd->oui_sresp); 928 hapd->oui_sresp = NULL; 929 } 930 #endif /* CONFIG_IEEE80211R_AP */ 931 932 933 int hostapd_setup_wpa(struct hostapd_data *hapd) 934 { 935 struct wpa_auth_config _conf; 936 static const struct wpa_auth_callbacks cb = { 937 .logger = hostapd_wpa_auth_logger, 938 .disconnect = hostapd_wpa_auth_disconnect, 939 .mic_failure_report = hostapd_wpa_auth_mic_failure_report, 940 .psk_failure_report = hostapd_wpa_auth_psk_failure_report, 941 .set_eapol = hostapd_wpa_auth_set_eapol, 942 .get_eapol = hostapd_wpa_auth_get_eapol, 943 .get_psk = hostapd_wpa_auth_get_psk, 944 .get_msk = hostapd_wpa_auth_get_msk, 945 .set_key = hostapd_wpa_auth_set_key, 946 .get_seqnum = hostapd_wpa_auth_get_seqnum, 947 .send_eapol = hostapd_wpa_auth_send_eapol, 948 .for_each_sta = hostapd_wpa_auth_for_each_sta, 949 .for_each_auth = hostapd_wpa_auth_for_each_auth, 950 .send_ether = hostapd_wpa_auth_send_ether, 951 .send_oui = hostapd_wpa_auth_send_oui, 952 #ifdef CONFIG_IEEE80211R_AP 953 .send_ft_action = hostapd_wpa_auth_send_ft_action, 954 .add_sta = hostapd_wpa_auth_add_sta, 955 .add_tspec = hostapd_wpa_auth_add_tspec, 956 #endif /* CONFIG_IEEE80211R_AP */ 957 }; 958 const u8 *wpa_ie; 959 size_t wpa_ie_len; 960 961 hostapd_wpa_auth_conf(hapd->conf, hapd->iconf, &_conf); 962 if (hapd->iface->drv_flags & WPA_DRIVER_FLAGS_EAPOL_TX_STATUS) 963 _conf.tx_status = 1; 964 if (hapd->iface->drv_flags & WPA_DRIVER_FLAGS_AP_MLME) 965 _conf.ap_mlme = 1; 966 hapd->wpa_auth = wpa_init(hapd->own_addr, &_conf, &cb, hapd); 967 if (hapd->wpa_auth == NULL) { 968 wpa_printf(MSG_ERROR, "WPA initialization failed."); 969 return -1; 970 } 971 972 if (hostapd_set_privacy(hapd, 1)) { 973 wpa_printf(MSG_ERROR, "Could not set PrivacyInvoked " 974 "for interface %s", hapd->conf->iface); 975 return -1; 976 } 977 978 wpa_ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &wpa_ie_len); 979 if (hostapd_set_generic_elem(hapd, wpa_ie, wpa_ie_len)) { 980 wpa_printf(MSG_ERROR, "Failed to configure WPA IE for " 981 "the kernel driver."); 982 return -1; 983 } 984 985 if (rsn_preauth_iface_init(hapd)) { 986 wpa_printf(MSG_ERROR, "Initialization of RSN " 987 "pre-authentication failed."); 988 return -1; 989 } 990 991 #ifdef CONFIG_IEEE80211R_AP 992 if (!hostapd_drv_none(hapd) && 993 wpa_key_mgmt_ft(hapd->conf->wpa_key_mgmt)) { 994 const char *ft_iface; 995 996 ft_iface = hapd->conf->bridge[0] ? hapd->conf->bridge : 997 hapd->conf->iface; 998 hapd->l2 = l2_packet_init(ft_iface, NULL, ETH_P_RRB, 999 hostapd_rrb_receive, hapd, 1); 1000 if (hapd->l2 == NULL && 1001 (hapd->driver == NULL || 1002 hapd->driver->send_ether == NULL)) { 1003 wpa_printf(MSG_ERROR, "Failed to open l2_packet " 1004 "interface"); 1005 return -1; 1006 } 1007 1008 if (hostapd_wpa_register_ft_oui(hapd, ft_iface)) { 1009 wpa_printf(MSG_ERROR, 1010 "Failed to open ETH_P_OUI interface"); 1011 return -1; 1012 } 1013 } 1014 #endif /* CONFIG_IEEE80211R_AP */ 1015 1016 return 0; 1017 1018 } 1019 1020 1021 void hostapd_reconfig_wpa(struct hostapd_data *hapd) 1022 { 1023 struct wpa_auth_config wpa_auth_conf; 1024 hostapd_wpa_auth_conf(hapd->conf, hapd->iconf, &wpa_auth_conf); 1025 wpa_reconfig(hapd->wpa_auth, &wpa_auth_conf); 1026 } 1027 1028 1029 void hostapd_deinit_wpa(struct hostapd_data *hapd) 1030 { 1031 ieee80211_tkip_countermeasures_deinit(hapd); 1032 rsn_preauth_iface_deinit(hapd); 1033 if (hapd->wpa_auth) { 1034 wpa_deinit(hapd->wpa_auth); 1035 hapd->wpa_auth = NULL; 1036 1037 if (hapd->drv_priv && hostapd_set_privacy(hapd, 0)) { 1038 wpa_printf(MSG_DEBUG, "Could not disable " 1039 "PrivacyInvoked for interface %s", 1040 hapd->conf->iface); 1041 } 1042 1043 if (hapd->drv_priv && 1044 hostapd_set_generic_elem(hapd, (u8 *) "", 0)) { 1045 wpa_printf(MSG_DEBUG, "Could not remove generic " 1046 "information element from interface %s", 1047 hapd->conf->iface); 1048 } 1049 } 1050 ieee802_1x_deinit(hapd); 1051 1052 #ifdef CONFIG_IEEE80211R_AP 1053 eloop_cancel_timeout(hostapd_wpa_ft_rrb_rx_later, hapd, ELOOP_ALL_CTX); 1054 hostapd_wpa_ft_rrb_rx_later(hapd, NULL); /* flush without delivering */ 1055 eloop_cancel_timeout(hostapd_oui_deliver_later, hapd, ELOOP_ALL_CTX); 1056 hostapd_oui_deliver_later(hapd, NULL); /* flush without delivering */ 1057 l2_packet_deinit(hapd->l2); 1058 hapd->l2 = NULL; 1059 hostapd_wpa_unregister_ft_oui(hapd); 1060 #endif /* CONFIG_IEEE80211R_AP */ 1061 } 1062
