wpa_auth_glue.c revision 1f69aa52ea2e0a73ac502565df8c666ee49cab6a
1/* 2 * hostapd / WPA authenticator glue code 3 * Copyright (c) 2002-2011, Jouni Malinen <j@w1.fi> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License version 2 as 7 * published by the Free Software Foundation. 8 * 9 * Alternatively, this software may be distributed under the terms of BSD 10 * license. 11 * 12 * See README and COPYING for more details. 13 */ 14 15#include "utils/includes.h" 16 17#include "utils/common.h" 18#include "common/ieee802_11_defs.h" 19#include "eapol_auth/eapol_auth_sm.h" 20#include "eapol_auth/eapol_auth_sm_i.h" 21#include "eap_server/eap.h" 22#include "l2_packet/l2_packet.h" 23#include "drivers/driver.h" 24#include "hostapd.h" 25#include "ieee802_1x.h" 26#include "preauth_auth.h" 27#include "sta_info.h" 28#include "tkip_countermeasures.h" 29#include "ap_drv_ops.h" 30#include "ap_config.h" 31#include "wpa_auth.h" 32#include "wpa_auth_glue.h" 33 34 35static void hostapd_wpa_auth_conf(struct hostapd_bss_config *conf, 36 struct wpa_auth_config *wconf) 37{ 38 os_memset(wconf, 0, sizeof(*wconf)); 39 wconf->wpa = conf->wpa; 40 wconf->wpa_key_mgmt = conf->wpa_key_mgmt; 41 wconf->wpa_pairwise = conf->wpa_pairwise; 42 wconf->wpa_group = conf->wpa_group; 43 wconf->wpa_group_rekey = conf->wpa_group_rekey; 44 wconf->wpa_strict_rekey = conf->wpa_strict_rekey; 45 wconf->wpa_gmk_rekey = conf->wpa_gmk_rekey; 46 wconf->wpa_ptk_rekey = conf->wpa_ptk_rekey; 47 wconf->rsn_pairwise = conf->rsn_pairwise; 48 wconf->rsn_preauth = conf->rsn_preauth; 49 wconf->eapol_version = conf->eapol_version; 50 wconf->peerkey = conf->peerkey; 51 wconf->wmm_enabled = conf->wmm_enabled; 52 wconf->wmm_uapsd = conf->wmm_uapsd; 53 wconf->disable_pmksa_caching = conf->disable_pmksa_caching; 54 wconf->okc = conf->okc; 55#ifdef CONFIG_IEEE80211W 56 wconf->ieee80211w = conf->ieee80211w; 57#endif /* CONFIG_IEEE80211W */ 58#ifdef CONFIG_IEEE80211R 59 wconf->ssid_len = conf->ssid.ssid_len; 60 if (wconf->ssid_len > SSID_LEN) 61 wconf->ssid_len = SSID_LEN; 62 os_memcpy(wconf->ssid, conf->ssid.ssid, wconf->ssid_len); 63 os_memcpy(wconf->mobility_domain, conf->mobility_domain, 64 MOBILITY_DOMAIN_ID_LEN); 65 if (conf->nas_identifier && 66 os_strlen(conf->nas_identifier) <= FT_R0KH_ID_MAX_LEN) { 67 wconf->r0_key_holder_len = os_strlen(conf->nas_identifier); 68 os_memcpy(wconf->r0_key_holder, conf->nas_identifier, 69 wconf->r0_key_holder_len); 70 } 71 os_memcpy(wconf->r1_key_holder, conf->r1_key_holder, FT_R1KH_ID_LEN); 72 wconf->r0_key_lifetime = conf->r0_key_lifetime; 73 wconf->reassociation_deadline = conf->reassociation_deadline; 74 wconf->r0kh_list = conf->r0kh_list; 75 wconf->r1kh_list = conf->r1kh_list; 76 wconf->pmk_r1_push = conf->pmk_r1_push; 77 wconf->ft_over_ds = conf->ft_over_ds; 78#endif /* CONFIG_IEEE80211R */ 79} 80 81 82static void hostapd_wpa_auth_logger(void *ctx, const u8 *addr, 83 logger_level level, const char *txt) 84{ 85#ifndef CONFIG_NO_HOSTAPD_LOGGER 86 struct hostapd_data *hapd = ctx; 87 int hlevel; 88 89 switch (level) { 90 case LOGGER_WARNING: 91 hlevel = HOSTAPD_LEVEL_WARNING; 92 break; 93 case LOGGER_INFO: 94 hlevel = HOSTAPD_LEVEL_INFO; 95 break; 96 case LOGGER_DEBUG: 97 default: 98 hlevel = HOSTAPD_LEVEL_DEBUG; 99 break; 100 } 101 102 hostapd_logger(hapd, addr, HOSTAPD_MODULE_WPA, hlevel, "%s", txt); 103#endif /* CONFIG_NO_HOSTAPD_LOGGER */ 104} 105 106 107static void hostapd_wpa_auth_disconnect(void *ctx, const u8 *addr, 108 u16 reason) 109{ 110 struct hostapd_data *hapd = ctx; 111 wpa_printf(MSG_DEBUG, "%s: WPA authenticator requests disconnect: " 112 "STA " MACSTR " reason %d", 113 __func__, MAC2STR(addr), reason); 114 ap_sta_disconnect(hapd, NULL, addr, reason); 115} 116 117 118static void hostapd_wpa_auth_mic_failure_report(void *ctx, const u8 *addr) 119{ 120 struct hostapd_data *hapd = ctx; 121 michael_mic_failure(hapd, addr, 0); 122} 123 124 125static void hostapd_wpa_auth_set_eapol(void *ctx, const u8 *addr, 126 wpa_eapol_variable var, int value) 127{ 128 struct hostapd_data *hapd = ctx; 129 struct sta_info *sta = ap_get_sta(hapd, addr); 130 if (sta == NULL) 131 return; 132 switch (var) { 133 case WPA_EAPOL_portEnabled: 134 ieee802_1x_notify_port_enabled(sta->eapol_sm, value); 135 break; 136 case WPA_EAPOL_portValid: 137 ieee802_1x_notify_port_valid(sta->eapol_sm, value); 138 break; 139 case WPA_EAPOL_authorized: 140 ieee802_1x_set_sta_authorized(hapd, sta, value); 141 break; 142 case WPA_EAPOL_portControl_Auto: 143 if (sta->eapol_sm) 144 sta->eapol_sm->portControl = Auto; 145 break; 146 case WPA_EAPOL_keyRun: 147 if (sta->eapol_sm) 148 sta->eapol_sm->keyRun = value ? TRUE : FALSE; 149 break; 150 case WPA_EAPOL_keyAvailable: 151 if (sta->eapol_sm) 152 sta->eapol_sm->eap_if->eapKeyAvailable = 153 value ? TRUE : FALSE; 154 break; 155 case WPA_EAPOL_keyDone: 156 if (sta->eapol_sm) 157 sta->eapol_sm->keyDone = value ? TRUE : FALSE; 158 break; 159 case WPA_EAPOL_inc_EapolFramesTx: 160 if (sta->eapol_sm) 161 sta->eapol_sm->dot1xAuthEapolFramesTx++; 162 break; 163 } 164} 165 166 167static int hostapd_wpa_auth_get_eapol(void *ctx, const u8 *addr, 168 wpa_eapol_variable var) 169{ 170 struct hostapd_data *hapd = ctx; 171 struct sta_info *sta = ap_get_sta(hapd, addr); 172 if (sta == NULL || sta->eapol_sm == NULL) 173 return -1; 174 switch (var) { 175 case WPA_EAPOL_keyRun: 176 return sta->eapol_sm->keyRun; 177 case WPA_EAPOL_keyAvailable: 178 return sta->eapol_sm->eap_if->eapKeyAvailable; 179 default: 180 return -1; 181 } 182} 183 184 185static const u8 * hostapd_wpa_auth_get_psk(void *ctx, const u8 *addr, 186 const u8 *prev_psk) 187{ 188 struct hostapd_data *hapd = ctx; 189 struct sta_info *sta = ap_get_sta(hapd, addr); 190 if (sta && sta->psk) 191 return sta->psk; 192 return hostapd_get_psk(hapd->conf, addr, prev_psk); 193} 194 195 196static int hostapd_wpa_auth_get_msk(void *ctx, const u8 *addr, u8 *msk, 197 size_t *len) 198{ 199 struct hostapd_data *hapd = ctx; 200 const u8 *key; 201 size_t keylen; 202 struct sta_info *sta; 203 204 sta = ap_get_sta(hapd, addr); 205 if (sta == NULL) 206 return -1; 207 208 key = ieee802_1x_get_key(sta->eapol_sm, &keylen); 209 if (key == NULL) 210 return -1; 211 212 if (keylen > *len) 213 keylen = *len; 214 os_memcpy(msk, key, keylen); 215 *len = keylen; 216 217 return 0; 218} 219 220 221static int hostapd_wpa_auth_set_key(void *ctx, int vlan_id, enum wpa_alg alg, 222 const u8 *addr, int idx, u8 *key, 223 size_t key_len) 224{ 225 struct hostapd_data *hapd = ctx; 226 const char *ifname = hapd->conf->iface; 227 228 if (vlan_id > 0) { 229 ifname = hostapd_get_vlan_id_ifname(hapd->conf->vlan, vlan_id); 230 if (ifname == NULL) 231 return -1; 232 } 233 234 return hostapd_drv_set_key(ifname, hapd, alg, addr, idx, 1, NULL, 0, 235 key, key_len); 236} 237 238 239static int hostapd_wpa_auth_get_seqnum(void *ctx, const u8 *addr, int idx, 240 u8 *seq) 241{ 242 struct hostapd_data *hapd = ctx; 243 return hostapd_get_seqnum(hapd->conf->iface, hapd, addr, idx, seq); 244} 245 246 247static int hostapd_wpa_auth_send_eapol(void *ctx, const u8 *addr, 248 const u8 *data, size_t data_len, 249 int encrypt) 250{ 251 struct hostapd_data *hapd = ctx; 252 struct sta_info *sta; 253 u32 flags = 0; 254 255 sta = ap_get_sta(hapd, addr); 256 if (sta) 257 flags = hostapd_sta_flags_to_drv(sta->flags); 258 259 return hostapd_drv_hapd_send_eapol(hapd, addr, data, data_len, 260 encrypt, flags); 261} 262 263 264static int hostapd_wpa_auth_for_each_sta( 265 void *ctx, int (*cb)(struct wpa_state_machine *sm, void *ctx), 266 void *cb_ctx) 267{ 268 struct hostapd_data *hapd = ctx; 269 struct sta_info *sta; 270 271 for (sta = hapd->sta_list; sta; sta = sta->next) { 272 if (sta->wpa_sm && cb(sta->wpa_sm, cb_ctx)) 273 return 1; 274 } 275 return 0; 276} 277 278 279struct wpa_auth_iface_iter_data { 280 int (*cb)(struct wpa_authenticator *sm, void *ctx); 281 void *cb_ctx; 282}; 283 284static int wpa_auth_iface_iter(struct hostapd_iface *iface, void *ctx) 285{ 286 struct wpa_auth_iface_iter_data *data = ctx; 287 size_t i; 288 for (i = 0; i < iface->num_bss; i++) { 289 if (iface->bss[i]->wpa_auth && 290 data->cb(iface->bss[i]->wpa_auth, data->cb_ctx)) 291 return 1; 292 } 293 return 0; 294} 295 296 297static int hostapd_wpa_auth_for_each_auth( 298 void *ctx, int (*cb)(struct wpa_authenticator *sm, void *ctx), 299 void *cb_ctx) 300{ 301 struct hostapd_data *hapd = ctx; 302 struct wpa_auth_iface_iter_data data; 303 if (hapd->iface->for_each_interface == NULL) 304 return -1; 305 data.cb = cb; 306 data.cb_ctx = cb_ctx; 307 return hapd->iface->for_each_interface(hapd->iface->interfaces, 308 wpa_auth_iface_iter, &data); 309} 310 311 312#ifdef CONFIG_IEEE80211R 313 314struct wpa_auth_ft_iface_iter_data { 315 struct hostapd_data *src_hapd; 316 const u8 *dst; 317 const u8 *data; 318 size_t data_len; 319}; 320 321 322static int hostapd_wpa_auth_ft_iter(struct hostapd_iface *iface, void *ctx) 323{ 324 struct wpa_auth_ft_iface_iter_data *idata = ctx; 325 struct hostapd_data *hapd; 326 size_t j; 327 328 for (j = 0; j < iface->num_bss; j++) { 329 hapd = iface->bss[j]; 330 if (hapd == idata->src_hapd) 331 continue; 332 if (os_memcmp(hapd->own_addr, idata->dst, ETH_ALEN) == 0) { 333 wpa_printf(MSG_DEBUG, "FT: Send RRB data directly to " 334 "locally managed BSS " MACSTR "@%s -> " 335 MACSTR "@%s", 336 MAC2STR(idata->src_hapd->own_addr), 337 idata->src_hapd->conf->iface, 338 MAC2STR(hapd->own_addr), hapd->conf->iface); 339 wpa_ft_rrb_rx(hapd->wpa_auth, 340 idata->src_hapd->own_addr, 341 idata->data, idata->data_len); 342 return 1; 343 } 344 } 345 346 return 0; 347} 348 349#endif /* CONFIG_IEEE80211R */ 350 351 352static int hostapd_wpa_auth_send_ether(void *ctx, const u8 *dst, u16 proto, 353 const u8 *data, size_t data_len) 354{ 355 struct hostapd_data *hapd = ctx; 356 struct l2_ethhdr *buf; 357 int ret; 358 359#ifdef CONFIG_IEEE80211R 360 if (proto == ETH_P_RRB && hapd->iface->for_each_interface) { 361 int res; 362 struct wpa_auth_ft_iface_iter_data idata; 363 idata.src_hapd = hapd; 364 idata.dst = dst; 365 idata.data = data; 366 idata.data_len = data_len; 367 res = hapd->iface->for_each_interface(hapd->iface->interfaces, 368 hostapd_wpa_auth_ft_iter, 369 &idata); 370 if (res == 1) 371 return data_len; 372 } 373#endif /* CONFIG_IEEE80211R */ 374 375 if (hapd->driver && hapd->driver->send_ether) 376 return hapd->driver->send_ether(hapd->drv_priv, dst, 377 hapd->own_addr, proto, 378 data, data_len); 379 if (hapd->l2 == NULL) 380 return -1; 381 382 buf = os_malloc(sizeof(*buf) + data_len); 383 if (buf == NULL) 384 return -1; 385 os_memcpy(buf->h_dest, dst, ETH_ALEN); 386 os_memcpy(buf->h_source, hapd->own_addr, ETH_ALEN); 387 buf->h_proto = host_to_be16(proto); 388 os_memcpy(buf + 1, data, data_len); 389 ret = l2_packet_send(hapd->l2, dst, proto, (u8 *) buf, 390 sizeof(*buf) + data_len); 391 os_free(buf); 392 return ret; 393} 394 395 396#ifdef CONFIG_IEEE80211R 397 398static int hostapd_wpa_auth_send_ft_action(void *ctx, const u8 *dst, 399 const u8 *data, size_t data_len) 400{ 401 struct hostapd_data *hapd = ctx; 402 int res; 403 struct ieee80211_mgmt *m; 404 size_t mlen; 405 struct sta_info *sta; 406 407 sta = ap_get_sta(hapd, dst); 408 if (sta == NULL || sta->wpa_sm == NULL) 409 return -1; 410 411 m = os_zalloc(sizeof(*m) + data_len); 412 if (m == NULL) 413 return -1; 414 mlen = ((u8 *) &m->u - (u8 *) m) + data_len; 415 m->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 416 WLAN_FC_STYPE_ACTION); 417 os_memcpy(m->da, dst, ETH_ALEN); 418 os_memcpy(m->sa, hapd->own_addr, ETH_ALEN); 419 os_memcpy(m->bssid, hapd->own_addr, ETH_ALEN); 420 os_memcpy(&m->u, data, data_len); 421 422 res = hostapd_drv_send_mlme(hapd, (u8 *) m, mlen, 0); 423 os_free(m); 424 return res; 425} 426 427 428static struct wpa_state_machine * 429hostapd_wpa_auth_add_sta(void *ctx, const u8 *sta_addr) 430{ 431 struct hostapd_data *hapd = ctx; 432 struct sta_info *sta; 433 434 sta = ap_sta_add(hapd, sta_addr); 435 if (sta == NULL) 436 return NULL; 437 if (sta->wpa_sm) { 438 sta->auth_alg = WLAN_AUTH_FT; 439 return sta->wpa_sm; 440 } 441 442 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth, sta->addr); 443 if (sta->wpa_sm == NULL) { 444 ap_free_sta(hapd, sta); 445 return NULL; 446 } 447 sta->auth_alg = WLAN_AUTH_FT; 448 449 return sta->wpa_sm; 450} 451 452 453static void hostapd_rrb_receive(void *ctx, const u8 *src_addr, const u8 *buf, 454 size_t len) 455{ 456 struct hostapd_data *hapd = ctx; 457 struct l2_ethhdr *ethhdr; 458 if (len < sizeof(*ethhdr)) 459 return; 460 ethhdr = (struct l2_ethhdr *) buf; 461 wpa_printf(MSG_DEBUG, "FT: RRB received packet " MACSTR " -> " 462 MACSTR, MAC2STR(ethhdr->h_source), MAC2STR(ethhdr->h_dest)); 463 wpa_ft_rrb_rx(hapd->wpa_auth, ethhdr->h_source, buf + sizeof(*ethhdr), 464 len - sizeof(*ethhdr)); 465} 466 467#endif /* CONFIG_IEEE80211R */ 468 469 470int hostapd_setup_wpa(struct hostapd_data *hapd) 471{ 472 struct wpa_auth_config _conf; 473 struct wpa_auth_callbacks cb; 474 const u8 *wpa_ie; 475 size_t wpa_ie_len; 476 477 hostapd_wpa_auth_conf(hapd->conf, &_conf); 478 if (hapd->iface->drv_flags & WPA_DRIVER_FLAGS_EAPOL_TX_STATUS) 479 _conf.tx_status = 1; 480 os_memset(&cb, 0, sizeof(cb)); 481 cb.ctx = hapd; 482 cb.logger = hostapd_wpa_auth_logger; 483 cb.disconnect = hostapd_wpa_auth_disconnect; 484 cb.mic_failure_report = hostapd_wpa_auth_mic_failure_report; 485 cb.set_eapol = hostapd_wpa_auth_set_eapol; 486 cb.get_eapol = hostapd_wpa_auth_get_eapol; 487 cb.get_psk = hostapd_wpa_auth_get_psk; 488 cb.get_msk = hostapd_wpa_auth_get_msk; 489 cb.set_key = hostapd_wpa_auth_set_key; 490 cb.get_seqnum = hostapd_wpa_auth_get_seqnum; 491 cb.send_eapol = hostapd_wpa_auth_send_eapol; 492 cb.for_each_sta = hostapd_wpa_auth_for_each_sta; 493 cb.for_each_auth = hostapd_wpa_auth_for_each_auth; 494 cb.send_ether = hostapd_wpa_auth_send_ether; 495#ifdef CONFIG_IEEE80211R 496 cb.send_ft_action = hostapd_wpa_auth_send_ft_action; 497 cb.add_sta = hostapd_wpa_auth_add_sta; 498#endif /* CONFIG_IEEE80211R */ 499 hapd->wpa_auth = wpa_init(hapd->own_addr, &_conf, &cb); 500 if (hapd->wpa_auth == NULL) { 501 wpa_printf(MSG_ERROR, "WPA initialization failed."); 502 return -1; 503 } 504 505 if (hostapd_set_privacy(hapd, 1)) { 506 wpa_printf(MSG_ERROR, "Could not set PrivacyInvoked " 507 "for interface %s", hapd->conf->iface); 508 return -1; 509 } 510 511 wpa_ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &wpa_ie_len); 512 if (hostapd_set_generic_elem(hapd, wpa_ie, wpa_ie_len)) { 513 wpa_printf(MSG_ERROR, "Failed to configure WPA IE for " 514 "the kernel driver."); 515 return -1; 516 } 517 518 if (rsn_preauth_iface_init(hapd)) { 519 wpa_printf(MSG_ERROR, "Initialization of RSN " 520 "pre-authentication failed."); 521 return -1; 522 } 523 524#ifdef CONFIG_IEEE80211R 525 if (!hostapd_drv_none(hapd)) { 526 hapd->l2 = l2_packet_init(hapd->conf->bridge[0] ? 527 hapd->conf->bridge : 528 hapd->conf->iface, NULL, ETH_P_RRB, 529 hostapd_rrb_receive, hapd, 1); 530 if (hapd->l2 == NULL && 531 (hapd->driver == NULL || 532 hapd->driver->send_ether == NULL)) { 533 wpa_printf(MSG_ERROR, "Failed to open l2_packet " 534 "interface"); 535 return -1; 536 } 537 } 538#endif /* CONFIG_IEEE80211R */ 539 540 return 0; 541 542} 543 544 545void hostapd_reconfig_wpa(struct hostapd_data *hapd) 546{ 547 struct wpa_auth_config wpa_auth_conf; 548 hostapd_wpa_auth_conf(hapd->conf, &wpa_auth_conf); 549 wpa_reconfig(hapd->wpa_auth, &wpa_auth_conf); 550} 551 552 553void hostapd_deinit_wpa(struct hostapd_data *hapd) 554{ 555 ieee80211_tkip_countermeasures_deinit(hapd); 556 rsn_preauth_iface_deinit(hapd); 557 if (hapd->wpa_auth) { 558 wpa_deinit(hapd->wpa_auth); 559 hapd->wpa_auth = NULL; 560 561 if (hostapd_set_privacy(hapd, 0)) { 562 wpa_printf(MSG_DEBUG, "Could not disable " 563 "PrivacyInvoked for interface %s", 564 hapd->conf->iface); 565 } 566 567 if (hostapd_set_generic_elem(hapd, (u8 *) "", 0)) { 568 wpa_printf(MSG_DEBUG, "Could not remove generic " 569 "information element from interface %s", 570 hapd->conf->iface); 571 } 572 } 573 ieee802_1x_deinit(hapd); 574 575#ifdef CONFIG_IEEE80211R 576 l2_packet_deinit(hapd->l2); 577#endif /* CONFIG_IEEE80211R */ 578} 579