wpa_auth_glue.c revision fb79edc9df1f20461e90e478363d207348213d35
1/* 2 * hostapd / WPA authenticator glue code 3 * Copyright (c) 2002-2012, Jouni Malinen <j@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 "common/sae.h" 14#include "eapol_auth/eapol_auth_sm.h" 15#include "eapol_auth/eapol_auth_sm_i.h" 16#include "eap_server/eap.h" 17#include "l2_packet/l2_packet.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 29static void hostapd_wpa_auth_conf(struct hostapd_bss_config *conf, 30 struct hostapd_config *iconf, 31 struct wpa_auth_config *wconf) 32{ 33 os_memset(wconf, 0, sizeof(*wconf)); 34 wconf->wpa = conf->wpa; 35 wconf->wpa_key_mgmt = conf->wpa_key_mgmt; 36 wconf->wpa_pairwise = conf->wpa_pairwise; 37 wconf->wpa_group = conf->wpa_group; 38 wconf->wpa_group_rekey = conf->wpa_group_rekey; 39 wconf->wpa_strict_rekey = conf->wpa_strict_rekey; 40 wconf->wpa_gmk_rekey = conf->wpa_gmk_rekey; 41 wconf->wpa_ptk_rekey = conf->wpa_ptk_rekey; 42 wconf->rsn_pairwise = conf->rsn_pairwise; 43 wconf->rsn_preauth = conf->rsn_preauth; 44 wconf->eapol_version = conf->eapol_version; 45 wconf->peerkey = conf->peerkey; 46 wconf->wmm_enabled = conf->wmm_enabled; 47 wconf->wmm_uapsd = conf->wmm_uapsd; 48 wconf->disable_pmksa_caching = conf->disable_pmksa_caching; 49 wconf->okc = conf->okc; 50#ifdef CONFIG_IEEE80211W 51 wconf->ieee80211w = conf->ieee80211w; 52#endif /* CONFIG_IEEE80211W */ 53#ifdef CONFIG_IEEE80211R 54 wconf->ssid_len = conf->ssid.ssid_len; 55 if (wconf->ssid_len > SSID_LEN) 56 wconf->ssid_len = SSID_LEN; 57 os_memcpy(wconf->ssid, conf->ssid.ssid, wconf->ssid_len); 58 os_memcpy(wconf->mobility_domain, conf->mobility_domain, 59 MOBILITY_DOMAIN_ID_LEN); 60 if (conf->nas_identifier && 61 os_strlen(conf->nas_identifier) <= FT_R0KH_ID_MAX_LEN) { 62 wconf->r0_key_holder_len = os_strlen(conf->nas_identifier); 63 os_memcpy(wconf->r0_key_holder, conf->nas_identifier, 64 wconf->r0_key_holder_len); 65 } 66 os_memcpy(wconf->r1_key_holder, conf->r1_key_holder, FT_R1KH_ID_LEN); 67 wconf->r0_key_lifetime = conf->r0_key_lifetime; 68 wconf->reassociation_deadline = conf->reassociation_deadline; 69 wconf->r0kh_list = conf->r0kh_list; 70 wconf->r1kh_list = conf->r1kh_list; 71 wconf->pmk_r1_push = conf->pmk_r1_push; 72 wconf->ft_over_ds = conf->ft_over_ds; 73#endif /* CONFIG_IEEE80211R */ 74#ifdef CONFIG_HS20 75 wconf->disable_gtk = conf->disable_dgaf; 76#endif /* CONFIG_HS20 */ 77#ifdef CONFIG_TESTING_OPTIONS 78 wconf->corrupt_gtk_rekey_mic_probability = 79 iconf->corrupt_gtk_rekey_mic_probability; 80#endif /* CONFIG_TESTING_OPTIONS */ 81} 82 83 84static void hostapd_wpa_auth_logger(void *ctx, const u8 *addr, 85 logger_level level, const char *txt) 86{ 87#ifndef CONFIG_NO_HOSTAPD_LOGGER 88 struct hostapd_data *hapd = ctx; 89 int hlevel; 90 91 switch (level) { 92 case LOGGER_WARNING: 93 hlevel = HOSTAPD_LEVEL_WARNING; 94 break; 95 case LOGGER_INFO: 96 hlevel = HOSTAPD_LEVEL_INFO; 97 break; 98 case LOGGER_DEBUG: 99 default: 100 hlevel = HOSTAPD_LEVEL_DEBUG; 101 break; 102 } 103 104 hostapd_logger(hapd, addr, HOSTAPD_MODULE_WPA, hlevel, "%s", txt); 105#endif /* CONFIG_NO_HOSTAPD_LOGGER */ 106} 107 108 109static void hostapd_wpa_auth_disconnect(void *ctx, const u8 *addr, 110 u16 reason) 111{ 112 struct hostapd_data *hapd = ctx; 113 wpa_printf(MSG_DEBUG, "%s: WPA authenticator requests disconnect: " 114 "STA " MACSTR " reason %d", 115 __func__, MAC2STR(addr), reason); 116 ap_sta_disconnect(hapd, NULL, addr, reason); 117} 118 119 120static int hostapd_wpa_auth_mic_failure_report(void *ctx, const u8 *addr) 121{ 122 struct hostapd_data *hapd = ctx; 123 return michael_mic_failure(hapd, addr, 0); 124} 125 126 127static void hostapd_wpa_auth_set_eapol(void *ctx, const u8 *addr, 128 wpa_eapol_variable var, int value) 129{ 130 struct hostapd_data *hapd = ctx; 131 struct sta_info *sta = ap_get_sta(hapd, addr); 132 if (sta == NULL) 133 return; 134 switch (var) { 135 case WPA_EAPOL_portEnabled: 136 ieee802_1x_notify_port_enabled(sta->eapol_sm, value); 137 break; 138 case WPA_EAPOL_portValid: 139 ieee802_1x_notify_port_valid(sta->eapol_sm, value); 140 break; 141 case WPA_EAPOL_authorized: 142 ieee802_1x_set_sta_authorized(hapd, sta, value); 143 break; 144 case WPA_EAPOL_portControl_Auto: 145 if (sta->eapol_sm) 146 sta->eapol_sm->portControl = Auto; 147 break; 148 case WPA_EAPOL_keyRun: 149 if (sta->eapol_sm) 150 sta->eapol_sm->keyRun = value ? TRUE : FALSE; 151 break; 152 case WPA_EAPOL_keyAvailable: 153 if (sta->eapol_sm) 154 sta->eapol_sm->eap_if->eapKeyAvailable = 155 value ? TRUE : FALSE; 156 break; 157 case WPA_EAPOL_keyDone: 158 if (sta->eapol_sm) 159 sta->eapol_sm->keyDone = value ? TRUE : FALSE; 160 break; 161 case WPA_EAPOL_inc_EapolFramesTx: 162 if (sta->eapol_sm) 163 sta->eapol_sm->dot1xAuthEapolFramesTx++; 164 break; 165 } 166} 167 168 169static int hostapd_wpa_auth_get_eapol(void *ctx, const u8 *addr, 170 wpa_eapol_variable var) 171{ 172 struct hostapd_data *hapd = ctx; 173 struct sta_info *sta = ap_get_sta(hapd, addr); 174 if (sta == NULL || sta->eapol_sm == NULL) 175 return -1; 176 switch (var) { 177 case WPA_EAPOL_keyRun: 178 return sta->eapol_sm->keyRun; 179 case WPA_EAPOL_keyAvailable: 180 return sta->eapol_sm->eap_if->eapKeyAvailable; 181 default: 182 return -1; 183 } 184} 185 186 187static const u8 * hostapd_wpa_auth_get_psk(void *ctx, const u8 *addr, 188 const u8 *p2p_dev_addr, 189 const u8 *prev_psk) 190{ 191 struct hostapd_data *hapd = ctx; 192 struct sta_info *sta = ap_get_sta(hapd, addr); 193 const u8 *psk; 194 195#ifdef CONFIG_SAE 196 if (sta && sta->auth_alg == WLAN_AUTH_SAE) { 197 if (!sta->sae || prev_psk) 198 return NULL; 199 return sta->sae->pmk; 200 } 201#endif /* CONFIG_SAE */ 202 203 psk = hostapd_get_psk(hapd->conf, addr, p2p_dev_addr, prev_psk); 204 /* 205 * This is about to iterate over all psks, prev_psk gives the last 206 * returned psk which should not be returned again. 207 * logic list (all hostapd_get_psk; all sta->psk) 208 */ 209 if (sta && sta->psk && !psk) { 210 struct hostapd_sta_wpa_psk_short *pos; 211 psk = sta->psk->psk; 212 for (pos = sta->psk; pos; pos = pos->next) { 213 if (pos->psk == prev_psk) { 214 psk = pos->next ? pos->next->psk : NULL; 215 break; 216 } 217 } 218 } 219 return psk; 220} 221 222 223static int hostapd_wpa_auth_get_msk(void *ctx, const u8 *addr, u8 *msk, 224 size_t *len) 225{ 226 struct hostapd_data *hapd = ctx; 227 const u8 *key; 228 size_t keylen; 229 struct sta_info *sta; 230 231 sta = ap_get_sta(hapd, addr); 232 if (sta == NULL) 233 return -1; 234 235 key = ieee802_1x_get_key(sta->eapol_sm, &keylen); 236 if (key == NULL) 237 return -1; 238 239 if (keylen > *len) 240 keylen = *len; 241 os_memcpy(msk, key, keylen); 242 *len = keylen; 243 244 return 0; 245} 246 247 248static int hostapd_wpa_auth_set_key(void *ctx, int vlan_id, enum wpa_alg alg, 249 const u8 *addr, int idx, u8 *key, 250 size_t key_len) 251{ 252 struct hostapd_data *hapd = ctx; 253 const char *ifname = hapd->conf->iface; 254 255 if (vlan_id > 0) { 256 ifname = hostapd_get_vlan_id_ifname(hapd->conf->vlan, vlan_id); 257 if (ifname == NULL) 258 return -1; 259 } 260 261 return hostapd_drv_set_key(ifname, hapd, alg, addr, idx, 1, NULL, 0, 262 key, key_len); 263} 264 265 266static int hostapd_wpa_auth_get_seqnum(void *ctx, const u8 *addr, int idx, 267 u8 *seq) 268{ 269 struct hostapd_data *hapd = ctx; 270 return hostapd_get_seqnum(hapd->conf->iface, hapd, addr, idx, seq); 271} 272 273 274static int hostapd_wpa_auth_send_eapol(void *ctx, const u8 *addr, 275 const u8 *data, size_t data_len, 276 int encrypt) 277{ 278 struct hostapd_data *hapd = ctx; 279 struct sta_info *sta; 280 u32 flags = 0; 281 282 sta = ap_get_sta(hapd, addr); 283 if (sta) 284 flags = hostapd_sta_flags_to_drv(sta->flags); 285 286 return hostapd_drv_hapd_send_eapol(hapd, addr, data, data_len, 287 encrypt, flags); 288} 289 290 291static int hostapd_wpa_auth_for_each_sta( 292 void *ctx, int (*cb)(struct wpa_state_machine *sm, void *ctx), 293 void *cb_ctx) 294{ 295 struct hostapd_data *hapd = ctx; 296 struct sta_info *sta; 297 298 for (sta = hapd->sta_list; sta; sta = sta->next) { 299 if (sta->wpa_sm && cb(sta->wpa_sm, cb_ctx)) 300 return 1; 301 } 302 return 0; 303} 304 305 306struct wpa_auth_iface_iter_data { 307 int (*cb)(struct wpa_authenticator *sm, void *ctx); 308 void *cb_ctx; 309}; 310 311static int wpa_auth_iface_iter(struct hostapd_iface *iface, void *ctx) 312{ 313 struct wpa_auth_iface_iter_data *data = ctx; 314 size_t i; 315 for (i = 0; i < iface->num_bss; i++) { 316 if (iface->bss[i]->wpa_auth && 317 data->cb(iface->bss[i]->wpa_auth, data->cb_ctx)) 318 return 1; 319 } 320 return 0; 321} 322 323 324static int hostapd_wpa_auth_for_each_auth( 325 void *ctx, int (*cb)(struct wpa_authenticator *sm, void *ctx), 326 void *cb_ctx) 327{ 328 struct hostapd_data *hapd = ctx; 329 struct wpa_auth_iface_iter_data data; 330 if (hapd->iface->interfaces == NULL || 331 hapd->iface->interfaces->for_each_interface == NULL) 332 return -1; 333 data.cb = cb; 334 data.cb_ctx = cb_ctx; 335 return hapd->iface->interfaces->for_each_interface( 336 hapd->iface->interfaces, wpa_auth_iface_iter, &data); 337} 338 339 340#ifdef CONFIG_IEEE80211R 341 342struct wpa_auth_ft_iface_iter_data { 343 struct hostapd_data *src_hapd; 344 const u8 *dst; 345 const u8 *data; 346 size_t data_len; 347}; 348 349 350static int hostapd_wpa_auth_ft_iter(struct hostapd_iface *iface, void *ctx) 351{ 352 struct wpa_auth_ft_iface_iter_data *idata = ctx; 353 struct hostapd_data *hapd; 354 size_t j; 355 356 for (j = 0; j < iface->num_bss; j++) { 357 hapd = iface->bss[j]; 358 if (hapd == idata->src_hapd) 359 continue; 360 if (os_memcmp(hapd->own_addr, idata->dst, ETH_ALEN) == 0) { 361 wpa_printf(MSG_DEBUG, "FT: Send RRB data directly to " 362 "locally managed BSS " MACSTR "@%s -> " 363 MACSTR "@%s", 364 MAC2STR(idata->src_hapd->own_addr), 365 idata->src_hapd->conf->iface, 366 MAC2STR(hapd->own_addr), hapd->conf->iface); 367 wpa_ft_rrb_rx(hapd->wpa_auth, 368 idata->src_hapd->own_addr, 369 idata->data, idata->data_len); 370 return 1; 371 } 372 } 373 374 return 0; 375} 376 377#endif /* CONFIG_IEEE80211R */ 378 379 380static int hostapd_wpa_auth_send_ether(void *ctx, const u8 *dst, u16 proto, 381 const u8 *data, size_t data_len) 382{ 383 struct hostapd_data *hapd = ctx; 384 struct l2_ethhdr *buf; 385 int ret; 386 387#ifdef CONFIG_IEEE80211R 388 if (proto == ETH_P_RRB && hapd->iface->interfaces && 389 hapd->iface->interfaces->for_each_interface) { 390 int res; 391 struct wpa_auth_ft_iface_iter_data idata; 392 idata.src_hapd = hapd; 393 idata.dst = dst; 394 idata.data = data; 395 idata.data_len = data_len; 396 res = hapd->iface->interfaces->for_each_interface( 397 hapd->iface->interfaces, hostapd_wpa_auth_ft_iter, 398 &idata); 399 if (res == 1) 400 return data_len; 401 } 402#endif /* CONFIG_IEEE80211R */ 403 404 if (hapd->driver && hapd->driver->send_ether) 405 return hapd->driver->send_ether(hapd->drv_priv, dst, 406 hapd->own_addr, proto, 407 data, data_len); 408 if (hapd->l2 == NULL) 409 return -1; 410 411 buf = os_malloc(sizeof(*buf) + data_len); 412 if (buf == NULL) 413 return -1; 414 os_memcpy(buf->h_dest, dst, ETH_ALEN); 415 os_memcpy(buf->h_source, hapd->own_addr, ETH_ALEN); 416 buf->h_proto = host_to_be16(proto); 417 os_memcpy(buf + 1, data, data_len); 418 ret = l2_packet_send(hapd->l2, dst, proto, (u8 *) buf, 419 sizeof(*buf) + data_len); 420 os_free(buf); 421 return ret; 422} 423 424 425#ifdef CONFIG_IEEE80211R 426 427static int hostapd_wpa_auth_send_ft_action(void *ctx, const u8 *dst, 428 const u8 *data, size_t data_len) 429{ 430 struct hostapd_data *hapd = ctx; 431 int res; 432 struct ieee80211_mgmt *m; 433 size_t mlen; 434 struct sta_info *sta; 435 436 sta = ap_get_sta(hapd, dst); 437 if (sta == NULL || sta->wpa_sm == NULL) 438 return -1; 439 440 m = os_zalloc(sizeof(*m) + data_len); 441 if (m == NULL) 442 return -1; 443 mlen = ((u8 *) &m->u - (u8 *) m) + data_len; 444 m->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 445 WLAN_FC_STYPE_ACTION); 446 os_memcpy(m->da, dst, ETH_ALEN); 447 os_memcpy(m->sa, hapd->own_addr, ETH_ALEN); 448 os_memcpy(m->bssid, hapd->own_addr, ETH_ALEN); 449 os_memcpy(&m->u, data, data_len); 450 451 res = hostapd_drv_send_mlme(hapd, (u8 *) m, mlen, 0); 452 os_free(m); 453 return res; 454} 455 456 457static struct wpa_state_machine * 458hostapd_wpa_auth_add_sta(void *ctx, const u8 *sta_addr) 459{ 460 struct hostapd_data *hapd = ctx; 461 struct sta_info *sta; 462 463 if (hostapd_add_sta_node(hapd, sta_addr, WLAN_AUTH_FT) < 0) 464 return NULL; 465 466 sta = ap_sta_add(hapd, sta_addr); 467 if (sta == NULL) 468 return NULL; 469 if (sta->wpa_sm) { 470 sta->auth_alg = WLAN_AUTH_FT; 471 return sta->wpa_sm; 472 } 473 474 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth, sta->addr, NULL); 475 if (sta->wpa_sm == NULL) { 476 ap_free_sta(hapd, sta); 477 return NULL; 478 } 479 sta->auth_alg = WLAN_AUTH_FT; 480 481 return sta->wpa_sm; 482} 483 484 485static void hostapd_rrb_receive(void *ctx, const u8 *src_addr, const u8 *buf, 486 size_t len) 487{ 488 struct hostapd_data *hapd = ctx; 489 struct l2_ethhdr *ethhdr; 490 if (len < sizeof(*ethhdr)) 491 return; 492 ethhdr = (struct l2_ethhdr *) buf; 493 wpa_printf(MSG_DEBUG, "FT: RRB received packet " MACSTR " -> " 494 MACSTR, MAC2STR(ethhdr->h_source), MAC2STR(ethhdr->h_dest)); 495 wpa_ft_rrb_rx(hapd->wpa_auth, ethhdr->h_source, buf + sizeof(*ethhdr), 496 len - sizeof(*ethhdr)); 497} 498 499 500static int hostapd_wpa_auth_add_tspec(void *ctx, const u8 *sta_addr, 501 u8 *tspec_ie, size_t tspec_ielen) 502{ 503 struct hostapd_data *hapd = ctx; 504 return hostapd_add_tspec(hapd, sta_addr, tspec_ie, tspec_ielen); 505} 506 507#endif /* CONFIG_IEEE80211R */ 508 509 510int hostapd_setup_wpa(struct hostapd_data *hapd) 511{ 512 struct wpa_auth_config _conf; 513 struct wpa_auth_callbacks cb; 514 const u8 *wpa_ie; 515 size_t wpa_ie_len; 516 517 hostapd_wpa_auth_conf(hapd->conf, hapd->iconf, &_conf); 518 if (hapd->iface->drv_flags & WPA_DRIVER_FLAGS_EAPOL_TX_STATUS) 519 _conf.tx_status = 1; 520 if (hapd->iface->drv_flags & WPA_DRIVER_FLAGS_AP_MLME) 521 _conf.ap_mlme = 1; 522 os_memset(&cb, 0, sizeof(cb)); 523 cb.ctx = hapd; 524 cb.logger = hostapd_wpa_auth_logger; 525 cb.disconnect = hostapd_wpa_auth_disconnect; 526 cb.mic_failure_report = hostapd_wpa_auth_mic_failure_report; 527 cb.set_eapol = hostapd_wpa_auth_set_eapol; 528 cb.get_eapol = hostapd_wpa_auth_get_eapol; 529 cb.get_psk = hostapd_wpa_auth_get_psk; 530 cb.get_msk = hostapd_wpa_auth_get_msk; 531 cb.set_key = hostapd_wpa_auth_set_key; 532 cb.get_seqnum = hostapd_wpa_auth_get_seqnum; 533 cb.send_eapol = hostapd_wpa_auth_send_eapol; 534 cb.for_each_sta = hostapd_wpa_auth_for_each_sta; 535 cb.for_each_auth = hostapd_wpa_auth_for_each_auth; 536 cb.send_ether = hostapd_wpa_auth_send_ether; 537#ifdef CONFIG_IEEE80211R 538 cb.send_ft_action = hostapd_wpa_auth_send_ft_action; 539 cb.add_sta = hostapd_wpa_auth_add_sta; 540 cb.add_tspec = hostapd_wpa_auth_add_tspec; 541#endif /* CONFIG_IEEE80211R */ 542 hapd->wpa_auth = wpa_init(hapd->own_addr, &_conf, &cb); 543 if (hapd->wpa_auth == NULL) { 544 wpa_printf(MSG_ERROR, "WPA initialization failed."); 545 return -1; 546 } 547 548 if (hostapd_set_privacy(hapd, 1)) { 549 wpa_printf(MSG_ERROR, "Could not set PrivacyInvoked " 550 "for interface %s", hapd->conf->iface); 551 return -1; 552 } 553 554 wpa_ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &wpa_ie_len); 555 if (hostapd_set_generic_elem(hapd, wpa_ie, wpa_ie_len)) { 556 wpa_printf(MSG_ERROR, "Failed to configure WPA IE for " 557 "the kernel driver."); 558 return -1; 559 } 560 561 if (rsn_preauth_iface_init(hapd)) { 562 wpa_printf(MSG_ERROR, "Initialization of RSN " 563 "pre-authentication failed."); 564 return -1; 565 } 566 567#ifdef CONFIG_IEEE80211R 568 if (!hostapd_drv_none(hapd)) { 569 hapd->l2 = l2_packet_init(hapd->conf->bridge[0] ? 570 hapd->conf->bridge : 571 hapd->conf->iface, NULL, ETH_P_RRB, 572 hostapd_rrb_receive, hapd, 1); 573 if (hapd->l2 == NULL && 574 (hapd->driver == NULL || 575 hapd->driver->send_ether == NULL)) { 576 wpa_printf(MSG_ERROR, "Failed to open l2_packet " 577 "interface"); 578 return -1; 579 } 580 } 581#endif /* CONFIG_IEEE80211R */ 582 583 return 0; 584 585} 586 587 588void hostapd_reconfig_wpa(struct hostapd_data *hapd) 589{ 590 struct wpa_auth_config wpa_auth_conf; 591 hostapd_wpa_auth_conf(hapd->conf, hapd->iconf, &wpa_auth_conf); 592 wpa_reconfig(hapd->wpa_auth, &wpa_auth_conf); 593} 594 595 596void hostapd_deinit_wpa(struct hostapd_data *hapd) 597{ 598 ieee80211_tkip_countermeasures_deinit(hapd); 599 rsn_preauth_iface_deinit(hapd); 600 if (hapd->wpa_auth) { 601 wpa_deinit(hapd->wpa_auth); 602 hapd->wpa_auth = NULL; 603 604 if (hostapd_set_privacy(hapd, 0)) { 605 wpa_printf(MSG_DEBUG, "Could not disable " 606 "PrivacyInvoked for interface %s", 607 hapd->conf->iface); 608 } 609 610 if (hostapd_set_generic_elem(hapd, (u8 *) "", 0)) { 611 wpa_printf(MSG_DEBUG, "Could not remove generic " 612 "information element from interface %s", 613 hapd->conf->iface); 614 } 615 } 616 ieee802_1x_deinit(hapd); 617 618#ifdef CONFIG_IEEE80211R 619 l2_packet_deinit(hapd->l2); 620 hapd->l2 = NULL; 621#endif /* CONFIG_IEEE80211R */ 622} 623