wpa_auth_glue.c revision 214501
1/* 2 * hostapd / WPA authenticator glue code 3 * Copyright (c) 2002-2009, 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 33 34#ifdef CONFIG_IEEE80211R 35static void hostapd_rrb_receive(void *ctx, const u8 *src_addr, const u8 *buf, 36 size_t len); 37#endif /* CONFIG_IEEE80211R */ 38 39 40static void hostapd_wpa_auth_conf(struct hostapd_bss_config *conf, 41 struct wpa_auth_config *wconf) 42{ 43 wconf->wpa = conf->wpa; 44 wconf->wpa_key_mgmt = conf->wpa_key_mgmt; 45 wconf->wpa_pairwise = conf->wpa_pairwise; 46 wconf->wpa_group = conf->wpa_group; 47 wconf->wpa_group_rekey = conf->wpa_group_rekey; 48 wconf->wpa_strict_rekey = conf->wpa_strict_rekey; 49 wconf->wpa_gmk_rekey = conf->wpa_gmk_rekey; 50 wconf->wpa_ptk_rekey = conf->wpa_ptk_rekey; 51 wconf->rsn_pairwise = conf->rsn_pairwise; 52 wconf->rsn_preauth = conf->rsn_preauth; 53 wconf->eapol_version = conf->eapol_version; 54 wconf->peerkey = conf->peerkey; 55 wconf->wmm_enabled = conf->wmm_enabled; 56 wconf->wmm_uapsd = conf->wmm_uapsd; 57 wconf->okc = conf->okc; 58#ifdef CONFIG_IEEE80211W 59 wconf->ieee80211w = conf->ieee80211w; 60#endif /* CONFIG_IEEE80211W */ 61#ifdef CONFIG_IEEE80211R 62 wconf->ssid_len = conf->ssid.ssid_len; 63 if (wconf->ssid_len > SSID_LEN) 64 wconf->ssid_len = SSID_LEN; 65 os_memcpy(wconf->ssid, conf->ssid.ssid, wconf->ssid_len); 66 os_memcpy(wconf->mobility_domain, conf->mobility_domain, 67 MOBILITY_DOMAIN_ID_LEN); 68 if (conf->nas_identifier && 69 os_strlen(conf->nas_identifier) <= FT_R0KH_ID_MAX_LEN) { 70 wconf->r0_key_holder_len = os_strlen(conf->nas_identifier); 71 os_memcpy(wconf->r0_key_holder, conf->nas_identifier, 72 wconf->r0_key_holder_len); 73 } 74 os_memcpy(wconf->r1_key_holder, conf->r1_key_holder, FT_R1KH_ID_LEN); 75 wconf->r0_key_lifetime = conf->r0_key_lifetime; 76 wconf->reassociation_deadline = conf->reassociation_deadline; 77 wconf->r0kh_list = conf->r0kh_list; 78 wconf->r1kh_list = conf->r1kh_list; 79 wconf->pmk_r1_push = conf->pmk_r1_push; 80#endif /* CONFIG_IEEE80211R */ 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 void hostapd_wpa_auth_mic_failure_report(void *ctx, const u8 *addr) 121{ 122 struct hostapd_data *hapd = ctx; 123 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 *prev_psk) 189{ 190 struct hostapd_data *hapd = ctx; 191 return hostapd_get_psk(hapd->conf, addr, prev_psk); 192} 193 194 195static int hostapd_wpa_auth_get_msk(void *ctx, const u8 *addr, u8 *msk, 196 size_t *len) 197{ 198 struct hostapd_data *hapd = ctx; 199 const u8 *key; 200 size_t keylen; 201 struct sta_info *sta; 202 203 sta = ap_get_sta(hapd, addr); 204 if (sta == NULL) 205 return -1; 206 207 key = ieee802_1x_get_key(sta->eapol_sm, &keylen); 208 if (key == NULL) 209 return -1; 210 211 if (keylen > *len) 212 keylen = *len; 213 os_memcpy(msk, key, keylen); 214 *len = keylen; 215 216 return 0; 217} 218 219 220static int hostapd_wpa_auth_set_key(void *ctx, int vlan_id, enum wpa_alg alg, 221 const u8 *addr, int idx, u8 *key, 222 size_t key_len) 223{ 224 struct hostapd_data *hapd = ctx; 225 const char *ifname = hapd->conf->iface; 226 227 if (vlan_id > 0) { 228 ifname = hostapd_get_vlan_id_ifname(hapd->conf->vlan, vlan_id); 229 if (ifname == NULL) 230 return -1; 231 } 232 233 return hapd->drv.set_key(ifname, hapd, alg, addr, idx, 1, NULL, 0, 234 key, key_len); 235} 236 237 238static int hostapd_wpa_auth_get_seqnum(void *ctx, const u8 *addr, int idx, 239 u8 *seq) 240{ 241 struct hostapd_data *hapd = ctx; 242 return hostapd_get_seqnum(hapd->conf->iface, hapd, addr, idx, seq); 243} 244 245 246static int hostapd_wpa_auth_send_eapol(void *ctx, const u8 *addr, 247 const u8 *data, size_t data_len, 248 int encrypt) 249{ 250 struct hostapd_data *hapd = ctx; 251 return hapd->drv.send_eapol(hapd, addr, data, data_len, encrypt); 252} 253 254 255static int hostapd_wpa_auth_for_each_sta( 256 void *ctx, int (*cb)(struct wpa_state_machine *sm, void *ctx), 257 void *cb_ctx) 258{ 259 struct hostapd_data *hapd = ctx; 260 struct sta_info *sta; 261 262 for (sta = hapd->sta_list; sta; sta = sta->next) { 263 if (sta->wpa_sm && cb(sta->wpa_sm, cb_ctx)) 264 return 1; 265 } 266 return 0; 267} 268 269 270struct wpa_auth_iface_iter_data { 271 int (*cb)(struct wpa_authenticator *sm, void *ctx); 272 void *cb_ctx; 273}; 274 275static int wpa_auth_iface_iter(struct hostapd_iface *iface, void *ctx) 276{ 277 struct wpa_auth_iface_iter_data *data = ctx; 278 size_t i; 279 for (i = 0; i < iface->num_bss; i++) { 280 if (iface->bss[i]->wpa_auth && 281 data->cb(iface->bss[i]->wpa_auth, data->cb_ctx)) 282 return 1; 283 } 284 return 0; 285} 286 287 288static int hostapd_wpa_auth_for_each_auth( 289 void *ctx, int (*cb)(struct wpa_authenticator *sm, void *ctx), 290 void *cb_ctx) 291{ 292 struct hostapd_data *hapd = ctx; 293 struct wpa_auth_iface_iter_data data; 294 if (hapd->iface->for_each_interface == NULL) 295 return -1; 296 data.cb = cb; 297 data.cb_ctx = cb_ctx; 298 return hapd->iface->for_each_interface(hapd->iface->interfaces, 299 wpa_auth_iface_iter, &data); 300} 301 302 303#ifdef CONFIG_IEEE80211R 304 305struct wpa_auth_ft_iface_iter_data { 306 struct hostapd_data *src_hapd; 307 const u8 *dst; 308 const u8 *data; 309 size_t data_len; 310}; 311 312 313static int hostapd_wpa_auth_ft_iter(struct hostapd_iface *iface, void *ctx) 314{ 315 struct wpa_auth_ft_iface_iter_data *idata = ctx; 316 struct hostapd_data *hapd; 317 size_t j; 318 319 for (j = 0; j < iface->num_bss; j++) { 320 hapd = iface->bss[j]; 321 if (hapd == idata->src_hapd) 322 continue; 323 if (os_memcmp(hapd->own_addr, idata->dst, ETH_ALEN) == 0) { 324 wpa_printf(MSG_DEBUG, "FT: Send RRB data directly to " 325 "locally managed BSS " MACSTR "@%s -> " 326 MACSTR "@%s", 327 MAC2STR(idata->src_hapd->own_addr), 328 idata->src_hapd->conf->iface, 329 MAC2STR(hapd->own_addr), hapd->conf->iface); 330 hostapd_rrb_receive(hapd, idata->src_hapd->own_addr, 331 idata->data, idata->data_len); 332 return 1; 333 } 334 } 335 336 return 0; 337} 338 339#endif /* CONFIG_IEEE80211R */ 340 341 342static int hostapd_wpa_auth_send_ether(void *ctx, const u8 *dst, u16 proto, 343 const u8 *data, size_t data_len) 344{ 345 struct hostapd_data *hapd = ctx; 346 347#ifdef CONFIG_IEEE80211R 348 if (proto == ETH_P_RRB && hapd->iface->for_each_interface) { 349 int res; 350 struct wpa_auth_ft_iface_iter_data idata; 351 idata.src_hapd = hapd; 352 idata.dst = dst; 353 idata.data = data; 354 idata.data_len = data_len; 355 res = hapd->iface->for_each_interface(hapd->iface->interfaces, 356 hostapd_wpa_auth_ft_iter, 357 &idata); 358 if (res == 1) 359 return data_len; 360 } 361#endif /* CONFIG_IEEE80211R */ 362 363 if (hapd->driver && hapd->driver->send_ether) 364 return hapd->driver->send_ether(hapd->drv_priv, dst, 365 hapd->own_addr, proto, 366 data, data_len); 367 if (hapd->l2 == NULL) 368 return -1; 369 return l2_packet_send(hapd->l2, dst, proto, data, data_len); 370} 371 372 373#ifdef CONFIG_IEEE80211R 374 375static int hostapd_wpa_auth_send_ft_action(void *ctx, const u8 *dst, 376 const u8 *data, size_t data_len) 377{ 378 struct hostapd_data *hapd = ctx; 379 int res; 380 struct ieee80211_mgmt *m; 381 size_t mlen; 382 struct sta_info *sta; 383 384 sta = ap_get_sta(hapd, dst); 385 if (sta == NULL || sta->wpa_sm == NULL) 386 return -1; 387 388 m = os_zalloc(sizeof(*m) + data_len); 389 if (m == NULL) 390 return -1; 391 mlen = ((u8 *) &m->u - (u8 *) m) + data_len; 392 m->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 393 WLAN_FC_STYPE_ACTION); 394 os_memcpy(m->da, dst, ETH_ALEN); 395 os_memcpy(m->sa, hapd->own_addr, ETH_ALEN); 396 os_memcpy(m->bssid, hapd->own_addr, ETH_ALEN); 397 os_memcpy(&m->u, data, data_len); 398 399 res = hapd->drv.send_mgmt_frame(hapd, (u8 *) m, mlen); 400 os_free(m); 401 return res; 402} 403 404 405static struct wpa_state_machine * 406hostapd_wpa_auth_add_sta(void *ctx, const u8 *sta_addr) 407{ 408 struct hostapd_data *hapd = ctx; 409 struct sta_info *sta; 410 411 sta = ap_sta_add(hapd, sta_addr); 412 if (sta == NULL) 413 return NULL; 414 if (sta->wpa_sm) { 415 sta->auth_alg = WLAN_AUTH_FT; 416 return sta->wpa_sm; 417 } 418 419 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth, sta->addr); 420 if (sta->wpa_sm == NULL) { 421 ap_free_sta(hapd, sta); 422 return NULL; 423 } 424 sta->auth_alg = WLAN_AUTH_FT; 425 426 return sta->wpa_sm; 427} 428 429 430static void hostapd_rrb_receive(void *ctx, const u8 *src_addr, const u8 *buf, 431 size_t len) 432{ 433 struct hostapd_data *hapd = ctx; 434 wpa_ft_rrb_rx(hapd->wpa_auth, src_addr, buf, len); 435} 436 437#endif /* CONFIG_IEEE80211R */ 438 439 440int hostapd_setup_wpa(struct hostapd_data *hapd) 441{ 442 struct wpa_auth_config _conf; 443 struct wpa_auth_callbacks cb; 444 const u8 *wpa_ie; 445 size_t wpa_ie_len; 446 447 hostapd_wpa_auth_conf(hapd->conf, &_conf); 448 os_memset(&cb, 0, sizeof(cb)); 449 cb.ctx = hapd; 450 cb.logger = hostapd_wpa_auth_logger; 451 cb.disconnect = hostapd_wpa_auth_disconnect; 452 cb.mic_failure_report = hostapd_wpa_auth_mic_failure_report; 453 cb.set_eapol = hostapd_wpa_auth_set_eapol; 454 cb.get_eapol = hostapd_wpa_auth_get_eapol; 455 cb.get_psk = hostapd_wpa_auth_get_psk; 456 cb.get_msk = hostapd_wpa_auth_get_msk; 457 cb.set_key = hostapd_wpa_auth_set_key; 458 cb.get_seqnum = hostapd_wpa_auth_get_seqnum; 459 cb.send_eapol = hostapd_wpa_auth_send_eapol; 460 cb.for_each_sta = hostapd_wpa_auth_for_each_sta; 461 cb.for_each_auth = hostapd_wpa_auth_for_each_auth; 462 cb.send_ether = hostapd_wpa_auth_send_ether; 463#ifdef CONFIG_IEEE80211R 464 cb.send_ft_action = hostapd_wpa_auth_send_ft_action; 465 cb.add_sta = hostapd_wpa_auth_add_sta; 466#endif /* CONFIG_IEEE80211R */ 467 hapd->wpa_auth = wpa_init(hapd->own_addr, &_conf, &cb); 468 if (hapd->wpa_auth == NULL) { 469 wpa_printf(MSG_ERROR, "WPA initialization failed."); 470 return -1; 471 } 472 473 if (hostapd_set_privacy(hapd, 1)) { 474 wpa_printf(MSG_ERROR, "Could not set PrivacyInvoked " 475 "for interface %s", hapd->conf->iface); 476 return -1; 477 } 478 479 wpa_ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &wpa_ie_len); 480 if (hostapd_set_generic_elem(hapd, wpa_ie, wpa_ie_len)) { 481 wpa_printf(MSG_ERROR, "Failed to configure WPA IE for " 482 "the kernel driver."); 483 return -1; 484 } 485 486 if (rsn_preauth_iface_init(hapd)) { 487 wpa_printf(MSG_ERROR, "Initialization of RSN " 488 "pre-authentication failed."); 489 return -1; 490 } 491 492#ifdef CONFIG_IEEE80211R 493 if (!hostapd_drv_none(hapd)) { 494 hapd->l2 = l2_packet_init(hapd->conf->bridge[0] ? 495 hapd->conf->bridge : 496 hapd->conf->iface, NULL, ETH_P_RRB, 497 hostapd_rrb_receive, hapd, 0); 498 if (hapd->l2 == NULL && 499 (hapd->driver == NULL || 500 hapd->driver->send_ether == NULL)) { 501 wpa_printf(MSG_ERROR, "Failed to open l2_packet " 502 "interface"); 503 return -1; 504 } 505 } 506#endif /* CONFIG_IEEE80211R */ 507 508 return 0; 509 510} 511 512 513void hostapd_reconfig_wpa(struct hostapd_data *hapd) 514{ 515 struct wpa_auth_config wpa_auth_conf; 516 hostapd_wpa_auth_conf(hapd->conf, &wpa_auth_conf); 517 wpa_reconfig(hapd->wpa_auth, &wpa_auth_conf); 518} 519 520 521void hostapd_deinit_wpa(struct hostapd_data *hapd) 522{ 523 rsn_preauth_iface_deinit(hapd); 524 if (hapd->wpa_auth) { 525 wpa_deinit(hapd->wpa_auth); 526 hapd->wpa_auth = NULL; 527 528 if (hostapd_set_privacy(hapd, 0)) { 529 wpa_printf(MSG_DEBUG, "Could not disable " 530 "PrivacyInvoked for interface %s", 531 hapd->conf->iface); 532 } 533 534 if (hostapd_set_generic_elem(hapd, (u8 *) "", 0)) { 535 wpa_printf(MSG_DEBUG, "Could not remove generic " 536 "information element from interface %s", 537 hapd->conf->iface); 538 } 539 } 540 ieee802_1x_deinit(hapd); 541 542#ifdef CONFIG_IEEE80211R 543 l2_packet_deinit(hapd->l2); 544#endif /* CONFIG_IEEE80211R */ 545} 546