www.project-moonshot.org Git - mech_eap.orig/blob - src/ap/wpa_auth_glue.c

   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
  35 static void hostapd_rrb_receive(void *ctx, const u8 *src_addr, const u8 *buf,
  36                                 size_t len);
  37 #endif /* CONFIG_IEEE80211R */
  38
  39
  40 static 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
  84 static 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
 109 static 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
 120 static 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
 127 static 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
 169 static 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
 187 static 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
 195 static 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
 220 static 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
 238 static 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
 246 static 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
 255 static 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
 270 struct wpa_auth_iface_iter_data {
 271         int (*cb)(struct wpa_authenticator *sm, void *ctx);
 272         void *cb_ctx;
 273 };
 274
 275 static 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
 288 static 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
 305 struct 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
 313 static 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
 342 static 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
 375 static 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
 405 static struct wpa_state_machine *
 406 hostapd_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
 430 static 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
 440 int 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
 513 void 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
 521 void 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 }