hostapd/ieee802_1x.c

   1 /*
   2  * hostapd / IEEE 802.1X-2004 Authenticator
   3  * Copyright (c) 2002-2008, 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 "includes.h"
  16
  17 #include "common.h"
  18 #include "hostapd.h"
  19 #include "ieee802_1x.h"
  20 #include "accounting.h"
  21 #include "radius/radius.h"
  22 #include "radius/radius_client.h"
  23 #include "eapol_auth/eapol_auth_sm.h"
  24 #include "md5.h"
  25 #include "crypto.h"
  26 #include "eloop.h"
  27 #include "sta_flags.h"
  28 #include "sta_info.h"
  29 #include "wpa.h"
  30 #include "preauth.h"
  31 #include "pmksa_cache.h"
  32 #include "driver_i.h"
  33 #include "hw_features.h"
  34 #include "eap_server/eap.h"
  35 #include "common/ieee802_11_defs.h"
  36 #include "common/wpa_ctrl.h"
  37
  38
  39 static void ieee802_1x_finished(struct hostapd_data *hapd,
  40                                 struct sta_info *sta, int success);
  41
  42
  43 static void ieee802_1x_send(struct hostapd_data *hapd, struct sta_info *sta,
  44                             u8 type, const u8 *data, size_t datalen)
  45 {
  46         u8 *buf;
  47         struct ieee802_1x_hdr *xhdr;
  48         size_t len;
  49         int encrypt = 0;
  50
  51         len = sizeof(*xhdr) + datalen;
  52         buf = os_zalloc(len);
  53         if (buf == NULL) {
  54                 wpa_printf(MSG_ERROR, "malloc() failed for "
  55                            "ieee802_1x_send(len=%lu)",
  56                            (unsigned long) len);
  57                 return;
  58         }
  59
  60         xhdr = (struct ieee802_1x_hdr *) buf;
  61         xhdr->version = hapd->conf->eapol_version;
  62         xhdr->type = type;
  63         xhdr->length = host_to_be16(datalen);
  64
  65         if (datalen > 0 && data != NULL)
  66                 os_memcpy(xhdr + 1, data, datalen);
  67
  68         if (wpa_auth_pairwise_set(sta->wpa_sm))
  69                 encrypt = 1;
  70         if (sta->flags & WLAN_STA_PREAUTH) {
  71                 rsn_preauth_send(hapd, sta, buf, len);
  72         } else {
  73                 hostapd_send_eapol(hapd, sta->addr, buf, len, encrypt);
  74         }
  75
  76         os_free(buf);
  77 }
  78
  79
  80 void ieee802_1x_set_sta_authorized(struct hostapd_data *hapd,
  81                                    struct sta_info *sta, int authorized)
  82 {
  83         int res;
  84
  85         if (sta->flags & WLAN_STA_PREAUTH)
  86                 return;
  87
  88         if (authorized) {
  89                 if (!(sta->flags & WLAN_STA_AUTHORIZED))
  90                         wpa_msg(hapd->msg_ctx, MSG_INFO,
  91                                 AP_STA_CONNECTED MACSTR, MAC2STR(sta->addr));
  92                 sta->flags |= WLAN_STA_AUTHORIZED;
  93                 res = hostapd_sta_set_flags(hapd, sta->addr, sta->flags,
  94                                             WLAN_STA_AUTHORIZED, ~0);
  95                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
  96                                HOSTAPD_LEVEL_DEBUG, "authorizing port");
  97         } else {
  98                 if ((sta->flags & (WLAN_STA_AUTHORIZED | WLAN_STA_ASSOC)) ==
  99                     (WLAN_STA_AUTHORIZED | WLAN_STA_ASSOC))
 100                         wpa_msg(hapd->msg_ctx, MSG_INFO,
 101                                 AP_STA_DISCONNECTED MACSTR,
 102                                 MAC2STR(sta->addr));
 103                 sta->flags &= ~WLAN_STA_AUTHORIZED;
 104                 res = hostapd_sta_set_flags(hapd, sta->addr, sta->flags,
 105                                             0, ~WLAN_STA_AUTHORIZED);
 106                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 107                                HOSTAPD_LEVEL_DEBUG, "unauthorizing port");
 108         }
 109
 110         if (res && errno != ENOENT) {
 111                 printf("Could not set station " MACSTR " flags for kernel "
 112                        "driver (errno=%d).\n", MAC2STR(sta->addr), errno);
 113         }
 114
 115         if (authorized)
 116                 accounting_sta_start(hapd, sta);
 117 }
 118
 119
 120 static void ieee802_1x_tx_key_one(struct hostapd_data *hapd,
 121                                   struct sta_info *sta,
 122                                   int idx, int broadcast,
 123                                   u8 *key_data, size_t key_len)
 124 {
 125         u8 *buf, *ekey;
 126         struct ieee802_1x_hdr *hdr;
 127         struct ieee802_1x_eapol_key *key;
 128         size_t len, ekey_len;
 129         struct eapol_state_machine *sm = sta->eapol_sm;
 130
 131         if (sm == NULL)
 132                 return;
 133
 134         len = sizeof(*key) + key_len;
 135         buf = os_zalloc(sizeof(*hdr) + len);
 136         if (buf == NULL)
 137                 return;
 138
 139         hdr = (struct ieee802_1x_hdr *) buf;
 140         key = (struct ieee802_1x_eapol_key *) (hdr + 1);
 141         key->type = EAPOL_KEY_TYPE_RC4;
 142         key->key_length = htons(key_len);
 143         wpa_get_ntp_timestamp(key->replay_counter);
 144
 145         if (os_get_random(key->key_iv, sizeof(key->key_iv))) {
 146                 wpa_printf(MSG_ERROR, "Could not get random numbers");
 147                 os_free(buf);
 148                 return;
 149         }
 150
 151         key->key_index = idx | (broadcast ? 0 : BIT(7));
 152         if (hapd->conf->eapol_key_index_workaround) {
 153                 /* According to some information, WinXP Supplicant seems to
 154                  * interpret bit7 as an indication whether the key is to be
 155                  * activated, so make it possible to enable workaround that
 156                  * sets this bit for all keys. */
 157                 key->key_index |= BIT(7);
 158         }
 159
 160         /* Key is encrypted using "Key-IV + MSK[0..31]" as the RC4-key and
 161          * MSK[32..63] is used to sign the message. */
 162         if (sm->eap_if->eapKeyData == NULL || sm->eap_if->eapKeyDataLen < 64) {
 163                 wpa_printf(MSG_ERROR, "No eapKeyData available for encrypting "
 164                            "and signing EAPOL-Key");
 165                 os_free(buf);
 166                 return;
 167         }
 168         os_memcpy((u8 *) (key + 1), key_data, key_len);
 169         ekey_len = sizeof(key->key_iv) + 32;
 170         ekey = os_malloc(ekey_len);
 171         if (ekey == NULL) {
 172                 wpa_printf(MSG_ERROR, "Could not encrypt key");
 173                 os_free(buf);
 174                 return;
 175         }
 176         os_memcpy(ekey, key->key_iv, sizeof(key->key_iv));
 177         os_memcpy(ekey + sizeof(key->key_iv), sm->eap_if->eapKeyData, 32);
 178         rc4_skip(ekey, ekey_len, 0, (u8 *) (key + 1), key_len);
 179         os_free(ekey);
 180
 181         /* This header is needed here for HMAC-MD5, but it will be regenerated
 182          * in ieee802_1x_send() */
 183         hdr->version = hapd->conf->eapol_version;
 184         hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
 185         hdr->length = host_to_be16(len);
 186         hmac_md5(sm->eap_if->eapKeyData + 32, 32, buf, sizeof(*hdr) + len,
 187                  key->key_signature);
 188
 189         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key to " MACSTR
 190                    " (%s index=%d)", MAC2STR(sm->addr),
 191                    broadcast ? "broadcast" : "unicast", idx);
 192         ieee802_1x_send(hapd, sta, IEEE802_1X_TYPE_EAPOL_KEY, (u8 *) key, len);
 193         if (sta->eapol_sm)
 194                 sta->eapol_sm->dot1xAuthEapolFramesTx++;
 195         os_free(buf);
 196 }
 197
 198
 199 #ifndef CONFIG_NO_VLAN
 200 static struct hostapd_wep_keys *
 201 ieee802_1x_group_alloc(struct hostapd_data *hapd, const char *ifname)
 202 {
 203         struct hostapd_wep_keys *key;
 204
 205         key = os_zalloc(sizeof(*key));
 206         if (key == NULL)
 207                 return NULL;
 208
 209         key->default_len = hapd->conf->default_wep_key_len;
 210
 211         if (key->idx >= hapd->conf->broadcast_key_idx_max ||
 212             key->idx < hapd->conf->broadcast_key_idx_min)
 213                 key->idx = hapd->conf->broadcast_key_idx_min;
 214         else
 215                 key->idx++;
 216
 217         if (!key->key[key->idx])
 218                 key->key[key->idx] = os_malloc(key->default_len);
 219         if (key->key[key->idx] == NULL ||
 220             os_get_random(key->key[key->idx], key->default_len)) {
 221                 printf("Could not generate random WEP key (dynamic VLAN).\n");
 222                 os_free(key->key[key->idx]);
 223                 key->key[key->idx] = NULL;
 224                 os_free(key);
 225                 return NULL;
 226         }
 227         key->len[key->idx] = key->default_len;
 228
 229         wpa_printf(MSG_DEBUG, "%s: Default WEP idx %d for dynamic VLAN\n",
 230                    ifname, key->idx);
 231         wpa_hexdump_key(MSG_DEBUG, "Default WEP key (dynamic VLAN)",
 232                         key->key[key->idx], key->len[key->idx]);
 233
 234         if (hostapd_set_key(ifname, hapd, WPA_ALG_WEP, NULL, key->idx, 1,
 235                             NULL, 0, key->key[key->idx], key->len[key->idx]))
 236                 printf("Could not set dynamic VLAN WEP encryption key.\n");
 237
 238         hostapd_set_ieee8021x(ifname, hapd, 1);
 239
 240         return key;
 241 }
 242
 243
 244 static struct hostapd_wep_keys *
 245 ieee802_1x_get_group(struct hostapd_data *hapd, struct hostapd_ssid *ssid,
 246                      size_t vlan_id)
 247 {
 248         const char *ifname;
 249
 250         if (vlan_id == 0)
 251                 return &ssid->wep;
 252
 253         if (vlan_id <= ssid->max_dyn_vlan_keys && ssid->dyn_vlan_keys &&
 254             ssid->dyn_vlan_keys[vlan_id])
 255                 return ssid->dyn_vlan_keys[vlan_id];
 256
 257         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Creating new group "
 258                    "state machine for VLAN ID %lu",
 259                    (unsigned long) vlan_id);
 260
 261         ifname = hostapd_get_vlan_id_ifname(hapd->conf->vlan, vlan_id);
 262         if (ifname == NULL) {
 263                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Unknown VLAN ID %lu - "
 264                            "cannot create group key state machine",
 265                            (unsigned long) vlan_id);
 266                 return NULL;
 267         }
 268
 269         if (ssid->dyn_vlan_keys == NULL) {
 270                 int size = (vlan_id + 1) * sizeof(ssid->dyn_vlan_keys[0]);
 271                 ssid->dyn_vlan_keys = os_zalloc(size);
 272                 if (ssid->dyn_vlan_keys == NULL)
 273                         return NULL;
 274                 ssid->max_dyn_vlan_keys = vlan_id;
 275         }
 276
 277         if (ssid->max_dyn_vlan_keys < vlan_id) {
 278                 struct hostapd_wep_keys **na;
 279                 int size = (vlan_id + 1) * sizeof(ssid->dyn_vlan_keys[0]);
 280                 na = os_realloc(ssid->dyn_vlan_keys, size);
 281                 if (na == NULL)
 282                         return NULL;
 283                 ssid->dyn_vlan_keys = na;
 284                 os_memset(&ssid->dyn_vlan_keys[ssid->max_dyn_vlan_keys + 1], 0,
 285                           (vlan_id - ssid->max_dyn_vlan_keys) *
 286                           sizeof(ssid->dyn_vlan_keys[0]));
 287                 ssid->max_dyn_vlan_keys = vlan_id;
 288         }
 289
 290         ssid->dyn_vlan_keys[vlan_id] = ieee802_1x_group_alloc(hapd, ifname);
 291
 292         return ssid->dyn_vlan_keys[vlan_id];
 293 }
 294 #endif /* CONFIG_NO_VLAN */
 295
 296
 297 void ieee802_1x_tx_key(struct hostapd_data *hapd, struct sta_info *sta)
 298 {
 299         struct eapol_authenticator *eapol = hapd->eapol_auth;
 300         struct eapol_state_machine *sm = sta->eapol_sm;
 301 #ifndef CONFIG_NO_VLAN
 302         struct hostapd_wep_keys *key = NULL;
 303         int vlan_id;
 304 #endif /* CONFIG_NO_VLAN */
 305
 306         if (sm == NULL || !sm->eap_if->eapKeyData)
 307                 return;
 308
 309         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key(s) to " MACSTR,
 310                    MAC2STR(sta->addr));
 311
 312 #ifndef CONFIG_NO_VLAN
 313         vlan_id = sta->vlan_id;
 314         if (vlan_id < 0 || vlan_id > MAX_VLAN_ID)
 315                 vlan_id = 0;
 316
 317         if (vlan_id) {
 318                 key = ieee802_1x_get_group(hapd, sta->ssid, vlan_id);
 319                 if (key && key->key[key->idx])
 320                         ieee802_1x_tx_key_one(hapd, sta, key->idx, 1,
 321                                               key->key[key->idx],
 322                                               key->len[key->idx]);
 323         } else
 324 #endif /* CONFIG_NO_VLAN */
 325         if (eapol->default_wep_key) {
 326                 ieee802_1x_tx_key_one(hapd, sta, eapol->default_wep_key_idx, 1,
 327                                       eapol->default_wep_key,
 328                                       hapd->conf->default_wep_key_len);
 329         }
 330
 331         if (hapd->conf->individual_wep_key_len > 0) {
 332                 u8 *ikey;
 333                 ikey = os_malloc(hapd->conf->individual_wep_key_len);
 334                 if (ikey == NULL ||
 335                     os_get_random(ikey, hapd->conf->individual_wep_key_len)) {
 336                         wpa_printf(MSG_ERROR, "Could not generate random "
 337                                    "individual WEP key.");
 338                         os_free(ikey);
 339                         return;
 340                 }
 341
 342                 wpa_hexdump_key(MSG_DEBUG, "Individual WEP key",
 343                                 ikey, hapd->conf->individual_wep_key_len);
 344
 345                 ieee802_1x_tx_key_one(hapd, sta, 0, 0, ikey,
 346                                       hapd->conf->individual_wep_key_len);
 347
 348                 /* TODO: set encryption in TX callback, i.e., only after STA
 349                  * has ACKed EAPOL-Key frame */
 350                 if (hostapd_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
 351                                     sta->addr, 0, 1, NULL, 0, ikey,
 352                                     hapd->conf->individual_wep_key_len)) {
 353                         wpa_printf(MSG_ERROR, "Could not set individual WEP "
 354                                    "encryption.");
 355                 }
 356
 357                 os_free(ikey);
 358         }
 359 }
 360
 361
 362 const char *radius_mode_txt(struct hostapd_data *hapd)
 363 {
 364         if (hapd->iface->current_mode == NULL)
 365                 return "802.11";
 366
 367         switch (hapd->iface->current_mode->mode) {
 368         case HOSTAPD_MODE_IEEE80211A:
 369                 return "802.11a";
 370         case HOSTAPD_MODE_IEEE80211G:
 371                 return "802.11g";
 372         case HOSTAPD_MODE_IEEE80211B:
 373         default:
 374                 return "802.11b";
 375         }
 376 }
 377
 378
 379 int radius_sta_rate(struct hostapd_data *hapd, struct sta_info *sta)
 380 {
 381         int i;
 382         u8 rate = 0;
 383
 384         for (i = 0; i < sta->supported_rates_len; i++)
 385                 if ((sta->supported_rates[i] & 0x7f) > rate)
 386                         rate = sta->supported_rates[i] & 0x7f;
 387
 388         return rate;
 389 }
 390
 391
 392 #ifndef CONFIG_NO_RADIUS
 393 static void ieee802_1x_learn_identity(struct hostapd_data *hapd,
 394                                       struct eapol_state_machine *sm,
 395                                       const u8 *eap, size_t len)
 396 {
 397         const u8 *identity;
 398         size_t identity_len;
 399
 400         if (len <= sizeof(struct eap_hdr) ||
 401             eap[sizeof(struct eap_hdr)] != EAP_TYPE_IDENTITY)
 402                 return;
 403
 404         identity = eap_get_identity(sm->eap, &identity_len);
 405         if (identity == NULL)
 406                 return;
 407
 408         /* Save station identity for future RADIUS packets */
 409         os_free(sm->identity);
 410         sm->identity = os_malloc(identity_len + 1);
 411         if (sm->identity == NULL) {
 412                 sm->identity_len = 0;
 413                 return;
 414         }
 415
 416         os_memcpy(sm->identity, identity, identity_len);
 417         sm->identity_len = identity_len;
 418         sm->identity[identity_len] = '\0';
 419         hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
 420                        HOSTAPD_LEVEL_DEBUG, "STA identity '%s'", sm->identity);
 421         sm->dot1xAuthEapolRespIdFramesRx++;
 422 }
 423
 424
 425 static void ieee802_1x_encapsulate_radius(struct hostapd_data *hapd,
 426                                           struct sta_info *sta,
 427                                           const u8 *eap, size_t len)
 428 {
 429         struct radius_msg *msg;
 430         char buf[128];
 431         struct eapol_state_machine *sm = sta->eapol_sm;
 432
 433         if (sm == NULL)
 434                 return;
 435
 436         ieee802_1x_learn_identity(hapd, sm, eap, len);
 437
 438         wpa_printf(MSG_DEBUG, "Encapsulating EAP message into a RADIUS "
 439                    "packet");
 440
 441         sm->radius_identifier = radius_client_get_id(hapd->radius);
 442         msg = radius_msg_new(RADIUS_CODE_ACCESS_REQUEST,
 443                              sm->radius_identifier);
 444         if (msg == NULL) {
 445                 printf("Could not create net RADIUS packet\n");
 446                 return;
 447         }
 448
 449         radius_msg_make_authenticator(msg, (u8 *) sta, sizeof(*sta));
 450
 451         if (sm->identity &&
 452             !radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME,
 453                                  sm->identity, sm->identity_len)) {
 454                 printf("Could not add User-Name\n");
 455                 goto fail;
 456         }
 457
 458         if (hapd->conf->own_ip_addr.af == AF_INET &&
 459             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS,
 460                                  (u8 *) &hapd->conf->own_ip_addr.u.v4, 4)) {
 461                 printf("Could not add NAS-IP-Address\n");
 462                 goto fail;
 463         }
 464
 465 #ifdef CONFIG_IPV6
 466         if (hapd->conf->own_ip_addr.af == AF_INET6 &&
 467             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IPV6_ADDRESS,
 468                                  (u8 *) &hapd->conf->own_ip_addr.u.v6, 16)) {
 469                 printf("Could not add NAS-IPv6-Address\n");
 470                 goto fail;
 471         }
 472 #endif /* CONFIG_IPV6 */
 473
 474         if (hapd->conf->nas_identifier &&
 475             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IDENTIFIER,
 476                                  (u8 *) hapd->conf->nas_identifier,
 477                                  os_strlen(hapd->conf->nas_identifier))) {
 478                 printf("Could not add NAS-Identifier\n");
 479                 goto fail;
 480         }
 481
 482         if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT, sta->aid)) {
 483                 printf("Could not add NAS-Port\n");
 484                 goto fail;
 485         }
 486
 487         os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT ":%s",
 488                     MAC2STR(hapd->own_addr), hapd->conf->ssid.ssid);
 489         buf[sizeof(buf) - 1] = '\0';
 490         if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLED_STATION_ID,
 491                                  (u8 *) buf, os_strlen(buf))) {
 492                 printf("Could not add Called-Station-Id\n");
 493                 goto fail;
 494         }
 495
 496         os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
 497                     MAC2STR(sta->addr));
 498         buf[sizeof(buf) - 1] = '\0';
 499         if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID,
 500                                  (u8 *) buf, os_strlen(buf))) {
 501                 printf("Could not add Calling-Station-Id\n");
 502                 goto fail;
 503         }
 504
 505         /* TODO: should probably check MTU from driver config; 2304 is max for
 506          * IEEE 802.11, but use 1400 to avoid problems with too large packets
 507          */
 508         if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_FRAMED_MTU, 1400)) {
 509                 printf("Could not add Framed-MTU\n");
 510                 goto fail;
 511         }
 512
 513         if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT_TYPE,
 514                                        RADIUS_NAS_PORT_TYPE_IEEE_802_11)) {
 515                 printf("Could not add NAS-Port-Type\n");
 516                 goto fail;
 517         }
 518
 519         if (sta->flags & WLAN_STA_PREAUTH) {
 520                 os_strlcpy(buf, "IEEE 802.11i Pre-Authentication",
 521                            sizeof(buf));
 522         } else {
 523                 os_snprintf(buf, sizeof(buf), "CONNECT %d%sMbps %s",
 524                             radius_sta_rate(hapd, sta) / 2,
 525                             (radius_sta_rate(hapd, sta) & 1) ? ".5" : "",
 526                             radius_mode_txt(hapd));
 527                 buf[sizeof(buf) - 1] = '\0';
 528         }
 529         if (!radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO,
 530                                  (u8 *) buf, os_strlen(buf))) {
 531                 printf("Could not add Connect-Info\n");
 532                 goto fail;
 533         }
 534
 535         if (eap && !radius_msg_add_eap(msg, eap, len)) {
 536                 printf("Could not add EAP-Message\n");
 537                 goto fail;
 538         }
 539
 540         /* State attribute must be copied if and only if this packet is
 541          * Access-Request reply to the previous Access-Challenge */
 542         if (sm->last_recv_radius && sm->last_recv_radius->hdr->code ==
 543             RADIUS_CODE_ACCESS_CHALLENGE) {
 544                 int res = radius_msg_copy_attr(msg, sm->last_recv_radius,
 545                                                RADIUS_ATTR_STATE);
 546                 if (res < 0) {
 547                         printf("Could not copy State attribute from previous "
 548                                "Access-Challenge\n");
 549                         goto fail;
 550                 }
 551                 if (res > 0) {
 552                         wpa_printf(MSG_DEBUG, "Copied RADIUS State Attribute");
 553                 }
 554         }
 555
 556         radius_client_send(hapd->radius, msg, RADIUS_AUTH, sta->addr);
 557         return;
 558
 559  fail:
 560         radius_msg_free(msg);
 561         os_free(msg);
 562 }
 563 #endif /* CONFIG_NO_RADIUS */
 564
 565
 566 static void handle_eap_response(struct hostapd_data *hapd,
 567                                 struct sta_info *sta, struct eap_hdr *eap,
 568                                 size_t len)
 569 {
 570         u8 type, *data;
 571         struct eapol_state_machine *sm = sta->eapol_sm;
 572         if (sm == NULL)
 573                 return;
 574
 575         data = (u8 *) (eap + 1);
 576
 577         if (len < sizeof(*eap) + 1) {
 578                 printf("handle_eap_response: too short response data\n");
 579                 return;
 580         }
 581
 582         sm->eap_type_supp = type = data[0];
 583
 584         hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
 585                        HOSTAPD_LEVEL_DEBUG, "received EAP packet (code=%d "
 586                        "id=%d len=%d) from STA: EAP Response-%s (%d)",
 587                        eap->code, eap->identifier, be_to_host16(eap->length),
 588                        eap_server_get_name(0, type), type);
 589
 590         sm->dot1xAuthEapolRespFramesRx++;
 591
 592         wpabuf_free(sm->eap_if->eapRespData);
 593         sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len);
 594         sm->eapolEap = TRUE;
 595 }
 596
 597
 598 /* Process incoming EAP packet from Supplicant */
 599 static void handle_eap(struct hostapd_data *hapd, struct sta_info *sta,
 600                        u8 *buf, size_t len)
 601 {
 602         struct eap_hdr *eap;
 603         u16 eap_len;
 604
 605         if (len < sizeof(*eap)) {
 606                 printf("   too short EAP packet\n");
 607                 return;
 608         }
 609
 610         eap = (struct eap_hdr *) buf;
 611
 612         eap_len = be_to_host16(eap->length);
 613         wpa_printf(MSG_DEBUG, "EAP: code=%d identifier=%d length=%d",
 614                    eap->code, eap->identifier, eap_len);
 615         if (eap_len < sizeof(*eap)) {
 616                 wpa_printf(MSG_DEBUG, "   Invalid EAP length");
 617                 return;
 618         } else if (eap_len > len) {
 619                 wpa_printf(MSG_DEBUG, "   Too short frame to contain this EAP "
 620                            "packet");
 621                 return;
 622         } else if (eap_len < len) {
 623                 wpa_printf(MSG_DEBUG, "   Ignoring %lu extra bytes after EAP "
 624                            "packet", (unsigned long) len - eap_len);
 625         }
 626
 627         switch (eap->code) {
 628         case EAP_CODE_REQUEST:
 629                 wpa_printf(MSG_DEBUG, " (request)");
 630                 return;
 631         case EAP_CODE_RESPONSE:
 632                 wpa_printf(MSG_DEBUG, " (response)");
 633                 handle_eap_response(hapd, sta, eap, eap_len);
 634                 break;
 635         case EAP_CODE_SUCCESS:
 636                 wpa_printf(MSG_DEBUG, " (success)");
 637                 return;
 638         case EAP_CODE_FAILURE:
 639                 wpa_printf(MSG_DEBUG, " (failure)");
 640                 return;
 641         default:
 642                 wpa_printf(MSG_DEBUG, " (unknown code)");
 643                 return;
 644         }
 645 }
 646
 647
 648 static struct eapol_state_machine *
 649 ieee802_1x_alloc_eapol_sm(struct hostapd_data *hapd, struct sta_info *sta)
 650 {
 651         int flags = 0;
 652         if (sta->flags & WLAN_STA_PREAUTH)
 653                 flags |= EAPOL_SM_PREAUTH;
 654         if (sta->wpa_sm) {
 655                 if (wpa_auth_sta_get_pmksa(sta->wpa_sm))
 656                         flags |= EAPOL_SM_USES_WPA;
 657                 if (wpa_auth_sta_get_pmksa(sta->wpa_sm))
 658                         flags |= EAPOL_SM_FROM_PMKSA_CACHE;
 659         }
 660         return eapol_auth_alloc(hapd->eapol_auth, sta->addr, flags,
 661                                 sta->wps_ie, sta);
 662 }
 663
 664
 665 /**
 666  * ieee802_1x_receive - Process the EAPOL frames from the Supplicant
 667  * @hapd: hostapd BSS data
 668  * @sa: Source address (sender of the EAPOL frame)
 669  * @buf: EAPOL frame
 670  * @len: Length of buf in octets
 671  *
 672  * This function is called for each incoming EAPOL frame from the interface
 673  */
 674 void ieee802_1x_receive(struct hostapd_data *hapd, const u8 *sa, const u8 *buf,
 675                         size_t len)
 676 {
 677         struct sta_info *sta;
 678         struct ieee802_1x_hdr *hdr;
 679         struct ieee802_1x_eapol_key *key;
 680         u16 datalen;
 681         struct rsn_pmksa_cache_entry *pmksa;
 682
 683         if (!hapd->conf->ieee802_1x && !hapd->conf->wpa &&
 684             !hapd->conf->wps_state)
 685                 return;
 686
 687         wpa_printf(MSG_DEBUG, "IEEE 802.1X: %lu bytes from " MACSTR,
 688                    (unsigned long) len, MAC2STR(sa));
 689         sta = ap_get_sta(hapd, sa);
 690         if (!sta || !(sta->flags & WLAN_STA_ASSOC)) {
 691                 wpa_printf(MSG_DEBUG, "IEEE 802.1X data frame from not "
 692                            "associated STA");
 693                 return;
 694         }
 695
 696         if (len < sizeof(*hdr)) {
 697                 printf("   too short IEEE 802.1X packet\n");
 698                 return;
 699         }
 700
 701         hdr = (struct ieee802_1x_hdr *) buf;
 702         datalen = be_to_host16(hdr->length);
 703         wpa_printf(MSG_DEBUG, "   IEEE 802.1X: version=%d type=%d length=%d",
 704                    hdr->version, hdr->type, datalen);
 705
 706         if (len - sizeof(*hdr) < datalen) {
 707                 printf("   frame too short for this IEEE 802.1X packet\n");
 708                 if (sta->eapol_sm)
 709                         sta->eapol_sm->dot1xAuthEapLengthErrorFramesRx++;
 710                 return;
 711         }
 712         if (len - sizeof(*hdr) > datalen) {
 713                 wpa_printf(MSG_DEBUG, "   ignoring %lu extra octets after "
 714                            "IEEE 802.1X packet",
 715                            (unsigned long) len - sizeof(*hdr) - datalen);
 716         }
 717
 718         if (sta->eapol_sm) {
 719                 sta->eapol_sm->dot1xAuthLastEapolFrameVersion = hdr->version;
 720                 sta->eapol_sm->dot1xAuthEapolFramesRx++;
 721         }
 722
 723         key = (struct ieee802_1x_eapol_key *) (hdr + 1);
 724         if (datalen >= sizeof(struct ieee802_1x_eapol_key) &&
 725             hdr->type == IEEE802_1X_TYPE_EAPOL_KEY &&
 726             (key->type == EAPOL_KEY_TYPE_WPA ||
 727              key->type == EAPOL_KEY_TYPE_RSN)) {
 728                 wpa_receive(hapd->wpa_auth, sta->wpa_sm, (u8 *) hdr,
 729                             sizeof(*hdr) + datalen);
 730                 return;
 731         }
 732
 733         if ((!hapd->conf->ieee802_1x &&
 734              !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) ||
 735             wpa_key_mgmt_wpa_psk(wpa_auth_sta_key_mgmt(sta->wpa_sm)))
 736                 return;
 737
 738         if (!sta->eapol_sm) {
 739                 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
 740                 if (!sta->eapol_sm)
 741                         return;
 742
 743 #ifdef CONFIG_WPS
 744                 if (!hapd->conf->ieee802_1x &&
 745                     ((sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) ==
 746                      WLAN_STA_MAYBE_WPS)) {
 747                         /*
 748                          * Delay EAPOL frame transmission until a possible WPS
 749                          * STA initiates the handshake with EAPOL-Start.
 750                          */
 751                         sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
 752                 }
 753 #endif /* CONFIG_WPS */
 754
 755                 sta->eapol_sm->eap_if->portEnabled = TRUE;
 756         }
 757
 758         /* since we support version 1, we can ignore version field and proceed
 759          * as specified in version 1 standard [IEEE Std 802.1X-2001, 7.5.5] */
 760         /* TODO: actually, we are not version 1 anymore.. However, Version 2
 761          * does not change frame contents, so should be ok to process frames
 762          * more or less identically. Some changes might be needed for
 763          * verification of fields. */
 764
 765         switch (hdr->type) {
 766         case IEEE802_1X_TYPE_EAP_PACKET:
 767                 handle_eap(hapd, sta, (u8 *) (hdr + 1), datalen);
 768                 break;
 769
 770         case IEEE802_1X_TYPE_EAPOL_START:
 771                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 772                                HOSTAPD_LEVEL_DEBUG, "received EAPOL-Start "
 773                                "from STA");
 774                 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
 775                 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
 776                 if (pmksa) {
 777                         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
 778                                        HOSTAPD_LEVEL_DEBUG, "cached PMKSA "
 779                                        "available - ignore it since "
 780                                        "STA sent EAPOL-Start");
 781                         wpa_auth_sta_clear_pmksa(sta->wpa_sm, pmksa);
 782                 }
 783                 sta->eapol_sm->eapolStart = TRUE;
 784                 sta->eapol_sm->dot1xAuthEapolStartFramesRx++;
 785                 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
 786                 break;
 787
 788         case IEEE802_1X_TYPE_EAPOL_LOGOFF:
 789                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 790                                HOSTAPD_LEVEL_DEBUG, "received EAPOL-Logoff "
 791                                "from STA");
 792                 sta->acct_terminate_cause =
 793                         RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
 794                 accounting_sta_stop(hapd, sta);
 795                 sta->eapol_sm->eapolLogoff = TRUE;
 796                 sta->eapol_sm->dot1xAuthEapolLogoffFramesRx++;
 797                 break;
 798
 799         case IEEE802_1X_TYPE_EAPOL_KEY:
 800                 wpa_printf(MSG_DEBUG, "   EAPOL-Key");
 801                 if (!(sta->flags & WLAN_STA_AUTHORIZED)) {
 802                         wpa_printf(MSG_DEBUG, "   Dropped key data from "
 803                                    "unauthorized Supplicant");
 804                         break;
 805                 }
 806                 break;
 807
 808         case IEEE802_1X_TYPE_EAPOL_ENCAPSULATED_ASF_ALERT:
 809                 wpa_printf(MSG_DEBUG, "   EAPOL-Encapsulated-ASF-Alert");
 810                 /* TODO: implement support for this; show data */
 811                 break;
 812
 813         default:
 814                 wpa_printf(MSG_DEBUG, "   unknown IEEE 802.1X packet type");
 815                 sta->eapol_sm->dot1xAuthInvalidEapolFramesRx++;
 816                 break;
 817         }
 818
 819         eapol_auth_step(sta->eapol_sm);
 820 }
 821
 822
 823 /**
 824  * ieee802_1x_new_station - Start IEEE 802.1X authentication
 825  * @hapd: hostapd BSS data
 826  * @sta: The station
 827  *
 828  * This function is called to start IEEE 802.1X authentication when a new
 829  * station completes IEEE 802.11 association.
 830  */
 831 void ieee802_1x_new_station(struct hostapd_data *hapd, struct sta_info *sta)
 832 {
 833         struct rsn_pmksa_cache_entry *pmksa;
 834         int reassoc = 1;
 835         int force_1x = 0;
 836
 837 #ifdef CONFIG_WPS
 838         if (hapd->conf->wps_state && hapd->conf->wpa &&
 839             (sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) {
 840                 /*
 841                  * Need to enable IEEE 802.1X/EAPOL state machines for possible
 842                  * WPS handshake even if IEEE 802.1X/EAPOL is not used for
 843                  * authentication in this BSS.
 844                  */
 845                 force_1x = 1;
 846         }
 847 #endif /* CONFIG_WPS */
 848
 849         if ((!force_1x && !hapd->conf->ieee802_1x) ||
 850             wpa_key_mgmt_wpa_psk(wpa_auth_sta_key_mgmt(sta->wpa_sm)))
 851                 return;
 852
 853         if (sta->eapol_sm == NULL) {
 854                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 855                                HOSTAPD_LEVEL_DEBUG, "start authentication");
 856                 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
 857                 if (sta->eapol_sm == NULL) {
 858                         hostapd_logger(hapd, sta->addr,
 859                                        HOSTAPD_MODULE_IEEE8021X,
 860                                        HOSTAPD_LEVEL_INFO,
 861                                        "failed to allocate state machine");
 862                         return;
 863                 }
 864                 reassoc = 0;
 865         }
 866
 867 #ifdef CONFIG_WPS
 868         sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
 869         if (!hapd->conf->ieee802_1x && !(sta->flags & WLAN_STA_WPS)) {
 870                 /*
 871                  * Delay EAPOL frame transmission until a possible WPS
 872                  * initiates the handshake with EAPOL-Start.
 873                  */
 874                 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
 875         }
 876 #endif /* CONFIG_WPS */
 877
 878         sta->eapol_sm->eap_if->portEnabled = TRUE;
 879
 880         pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
 881         if (pmksa) {
 882                 int old_vlanid;
 883
 884                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 885                                HOSTAPD_LEVEL_DEBUG,
 886                                "PMK from PMKSA cache - skip IEEE 802.1X/EAP");
 887                 /* Setup EAPOL state machines to already authenticated state
 888                  * because of existing PMKSA information in the cache. */
 889                 sta->eapol_sm->keyRun = TRUE;
 890                 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
 891                 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
 892                 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
 893                 sta->eapol_sm->authSuccess = TRUE;
 894                 if (sta->eapol_sm->eap)
 895                         eap_sm_notify_cached(sta->eapol_sm->eap);
 896                 old_vlanid = sta->vlan_id;
 897                 pmksa_cache_to_eapol_data(pmksa, sta->eapol_sm);
 898                 if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
 899                         sta->vlan_id = 0;
 900                 ap_sta_bind_vlan(hapd, sta, old_vlanid);
 901         } else {
 902                 if (reassoc) {
 903                         /*
 904                          * Force EAPOL state machines to start
 905                          * re-authentication without having to wait for the
 906                          * Supplicant to send EAPOL-Start.
 907                          */
 908                         sta->eapol_sm->reAuthenticate = TRUE;
 909                 }
 910                 eapol_auth_step(sta->eapol_sm);
 911         }
 912 }
 913
 914
 915 void ieee802_1x_free_station(struct sta_info *sta)
 916 {
 917         struct eapol_state_machine *sm = sta->eapol_sm;
 918
 919         if (sm == NULL)
 920                 return;
 921
 922         sta->eapol_sm = NULL;
 923
 924 #ifndef CONFIG_NO_RADIUS
 925         if (sm->last_recv_radius) {
 926                 radius_msg_free(sm->last_recv_radius);
 927                 os_free(sm->last_recv_radius);
 928         }
 929         radius_free_class(&sm->radius_class);
 930 #endif /* CONFIG_NO_RADIUS */
 931
 932         os_free(sm->identity);
 933         eapol_auth_free(sm);
 934 }
 935
 936
 937 #ifndef CONFIG_NO_RADIUS
 938 static void ieee802_1x_decapsulate_radius(struct hostapd_data *hapd,
 939                                           struct sta_info *sta)
 940 {
 941         u8 *eap;
 942         size_t len;
 943         struct eap_hdr *hdr;
 944         int eap_type = -1;
 945         char buf[64];
 946         struct radius_msg *msg;
 947         struct eapol_state_machine *sm = sta->eapol_sm;
 948
 949         if (sm == NULL || sm->last_recv_radius == NULL) {
 950                 if (sm)
 951                         sm->eap_if->aaaEapNoReq = TRUE;
 952                 return;
 953         }
 954
 955         msg = sm->last_recv_radius;
 956
 957         eap = radius_msg_get_eap(msg, &len);
 958         if (eap == NULL) {
 959                 /* RFC 3579, Chap. 2.6.3:
 960                  * RADIUS server SHOULD NOT send Access-Reject/no EAP-Message
 961                  * attribute */
 962                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 963                                HOSTAPD_LEVEL_WARNING, "could not extract "
 964                                "EAP-Message from RADIUS message");
 965                 sm->eap_if->aaaEapNoReq = TRUE;
 966                 return;
 967         }
 968
 969         if (len < sizeof(*hdr)) {
 970                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 971                                HOSTAPD_LEVEL_WARNING, "too short EAP packet "
 972                                "received from authentication server");
 973                 os_free(eap);
 974                 sm->eap_if->aaaEapNoReq = TRUE;
 975                 return;
 976         }
 977
 978         if (len > sizeof(*hdr))
 979                 eap_type = eap[sizeof(*hdr)];
 980
 981         hdr = (struct eap_hdr *) eap;
 982         switch (hdr->code) {
 983         case EAP_CODE_REQUEST:
 984                 if (eap_type >= 0)
 985                         sm->eap_type_authsrv = eap_type;
 986                 os_snprintf(buf, sizeof(buf), "EAP-Request-%s (%d)",
 987                             eap_type >= 0 ? eap_server_get_name(0, eap_type) :
 988                             "??",
 989                             eap_type);
 990                 break;
 991         case EAP_CODE_RESPONSE:
 992                 os_snprintf(buf, sizeof(buf), "EAP Response-%s (%d)",
 993                             eap_type >= 0 ? eap_server_get_name(0, eap_type) :
 994                             "??",
 995                             eap_type);
 996                 break;
 997         case EAP_CODE_SUCCESS:
 998                 os_strlcpy(buf, "EAP Success", sizeof(buf));
 999                 break;
1000         case EAP_CODE_FAILURE:
1001                 os_strlcpy(buf, "EAP Failure", sizeof(buf));
1002                 break;
1003         default:
1004                 os_strlcpy(buf, "unknown EAP code", sizeof(buf));
1005                 break;
1006         }
1007         buf[sizeof(buf) - 1] = '\0';
1008         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1009                        HOSTAPD_LEVEL_DEBUG, "decapsulated EAP packet (code=%d "
1010                        "id=%d len=%d) from RADIUS server: %s",
1011                        hdr->code, hdr->identifier, be_to_host16(hdr->length),
1012                        buf);
1013         sm->eap_if->aaaEapReq = TRUE;
1014
1015         wpabuf_free(sm->eap_if->aaaEapReqData);
1016         sm->eap_if->aaaEapReqData = wpabuf_alloc_ext_data(eap, len);
1017 }
1018
1019
1020 static void ieee802_1x_get_keys(struct hostapd_data *hapd,
1021                                 struct sta_info *sta, struct radius_msg *msg,
1022                                 struct radius_msg *req,
1023                                 const u8 *shared_secret,
1024                                 size_t shared_secret_len)
1025 {
1026         struct radius_ms_mppe_keys *keys;
1027         struct eapol_state_machine *sm = sta->eapol_sm;
1028         if (sm == NULL)
1029                 return;
1030
1031         keys = radius_msg_get_ms_keys(msg, req, shared_secret,
1032                                       shared_secret_len);
1033
1034         if (keys && keys->send && keys->recv) {
1035                 size_t len = keys->send_len + keys->recv_len;
1036                 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Send-Key",
1037                                 keys->send, keys->send_len);
1038                 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Recv-Key",
1039                                 keys->recv, keys->recv_len);
1040
1041                 os_free(sm->eap_if->aaaEapKeyData);
1042                 sm->eap_if->aaaEapKeyData = os_malloc(len);
1043                 if (sm->eap_if->aaaEapKeyData) {
1044                         os_memcpy(sm->eap_if->aaaEapKeyData, keys->recv,
1045                                   keys->recv_len);
1046                         os_memcpy(sm->eap_if->aaaEapKeyData + keys->recv_len,
1047                                   keys->send, keys->send_len);
1048                         sm->eap_if->aaaEapKeyDataLen = len;
1049                         sm->eap_if->aaaEapKeyAvailable = TRUE;
1050                 }
1051         }
1052
1053         if (keys) {
1054                 os_free(keys->send);
1055                 os_free(keys->recv);
1056                 os_free(keys);
1057         }
1058 }
1059
1060
1061 static void ieee802_1x_store_radius_class(struct hostapd_data *hapd,
1062                                           struct sta_info *sta,
1063                                           struct radius_msg *msg)
1064 {
1065         u8 *class;
1066         size_t class_len;
1067         struct eapol_state_machine *sm = sta->eapol_sm;
1068         int count, i;
1069         struct radius_attr_data *nclass;
1070         size_t nclass_count;
1071
1072         if (!hapd->conf->radius->acct_server || hapd->radius == NULL ||
1073             sm == NULL)
1074                 return;
1075
1076         radius_free_class(&sm->radius_class);
1077         count = radius_msg_count_attr(msg, RADIUS_ATTR_CLASS, 1);
1078         if (count <= 0)
1079                 return;
1080
1081         nclass = os_zalloc(count * sizeof(struct radius_attr_data));
1082         if (nclass == NULL)
1083                 return;
1084
1085         nclass_count = 0;
1086
1087         class = NULL;
1088         for (i = 0; i < count; i++) {
1089                 do {
1090                         if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CLASS,
1091                                                     &class, &class_len,
1092                                                     class) < 0) {
1093                                 i = count;
1094                                 break;
1095                         }
1096                 } while (class_len < 1);
1097
1098                 nclass[nclass_count].data = os_malloc(class_len);
1099                 if (nclass[nclass_count].data == NULL)
1100                         break;
1101
1102                 os_memcpy(nclass[nclass_count].data, class, class_len);
1103                 nclass[nclass_count].len = class_len;
1104                 nclass_count++;
1105         }
1106
1107         sm->radius_class.attr = nclass;
1108         sm->radius_class.count = nclass_count;
1109         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Stored %lu RADIUS Class "
1110                    "attributes for " MACSTR,
1111                    (unsigned long) sm->radius_class.count,
1112                    MAC2STR(sta->addr));
1113 }
1114
1115
1116 /* Update sta->identity based on User-Name attribute in Access-Accept */
1117 static void ieee802_1x_update_sta_identity(struct hostapd_data *hapd,
1118                                            struct sta_info *sta,
1119                                            struct radius_msg *msg)
1120 {
1121         u8 *buf, *identity;
1122         size_t len;
1123         struct eapol_state_machine *sm = sta->eapol_sm;
1124
1125         if (sm == NULL)
1126                 return;
1127
1128         if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_USER_NAME, &buf, &len,
1129                                     NULL) < 0)
1130                 return;
1131
1132         identity = os_malloc(len + 1);
1133         if (identity == NULL)
1134                 return;
1135
1136         os_memcpy(identity, buf, len);
1137         identity[len] = '\0';
1138
1139         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1140                        HOSTAPD_LEVEL_DEBUG, "old identity '%s' updated with "
1141                        "User-Name from Access-Accept '%s'",
1142                        sm->identity ? (char *) sm->identity : "N/A",
1143                        (char *) identity);
1144
1145         os_free(sm->identity);
1146         sm->identity = identity;
1147         sm->identity_len = len;
1148 }
1149
1150
1151 struct sta_id_search {
1152         u8 identifier;
1153         struct eapol_state_machine *sm;
1154 };
1155
1156
1157 static int ieee802_1x_select_radius_identifier(struct hostapd_data *hapd,
1158                                                struct sta_info *sta,
1159                                                void *ctx)
1160 {
1161         struct sta_id_search *id_search = ctx;
1162         struct eapol_state_machine *sm = sta->eapol_sm;
1163
1164         if (sm && sm->radius_identifier >= 0 &&
1165             sm->radius_identifier == id_search->identifier) {
1166                 id_search->sm = sm;
1167                 return 1;
1168         }
1169         return 0;
1170 }
1171
1172
1173 static struct eapol_state_machine *
1174 ieee802_1x_search_radius_identifier(struct hostapd_data *hapd, u8 identifier)
1175 {
1176         struct sta_id_search id_search;
1177         id_search.identifier = identifier;
1178         id_search.sm = NULL;
1179         ap_for_each_sta(hapd, ieee802_1x_select_radius_identifier, &id_search);
1180         return id_search.sm;
1181 }
1182
1183
1184 /**
1185  * ieee802_1x_receive_auth - Process RADIUS frames from Authentication Server
1186  * @msg: RADIUS response message
1187  * @req: RADIUS request message
1188  * @shared_secret: RADIUS shared secret
1189  * @shared_secret_len: Length of shared_secret in octets
1190  * @data: Context data (struct hostapd_data *)
1191  * Returns: Processing status
1192  */
1193 static RadiusRxResult
1194 ieee802_1x_receive_auth(struct radius_msg *msg, struct radius_msg *req,
1195                         const u8 *shared_secret, size_t shared_secret_len,
1196                         void *data)
1197 {
1198         struct hostapd_data *hapd = data;
1199         struct sta_info *sta;
1200         u32 session_timeout = 0, termination_action, acct_interim_interval;
1201         int session_timeout_set, old_vlanid = 0;
1202         struct eapol_state_machine *sm;
1203         int override_eapReq = 0;
1204
1205         sm = ieee802_1x_search_radius_identifier(hapd, msg->hdr->identifier);
1206         if (sm == NULL) {
1207                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Could not find matching "
1208                            "station for this RADIUS message");
1209                 return RADIUS_RX_UNKNOWN;
1210         }
1211         sta = sm->sta;
1212
1213         /* RFC 2869, Ch. 5.13: valid Message-Authenticator attribute MUST be
1214          * present when packet contains an EAP-Message attribute */
1215         if (msg->hdr->code == RADIUS_CODE_ACCESS_REJECT &&
1216             radius_msg_get_attr(msg, RADIUS_ATTR_MESSAGE_AUTHENTICATOR, NULL,
1217                                 0) < 0 &&
1218             radius_msg_get_attr(msg, RADIUS_ATTR_EAP_MESSAGE, NULL, 0) < 0) {
1219                 wpa_printf(MSG_DEBUG, "Allowing RADIUS Access-Reject without "
1220                            "Message-Authenticator since it does not include "
1221                            "EAP-Message");
1222         } else if (radius_msg_verify(msg, shared_secret, shared_secret_len,
1223                                      req, 1)) {
1224                 printf("Incoming RADIUS packet did not have correct "
1225                        "Message-Authenticator - dropped\n");
1226                 return RADIUS_RX_INVALID_AUTHENTICATOR;
1227         }
1228
1229         if (msg->hdr->code != RADIUS_CODE_ACCESS_ACCEPT &&
1230             msg->hdr->code != RADIUS_CODE_ACCESS_REJECT &&
1231             msg->hdr->code != RADIUS_CODE_ACCESS_CHALLENGE) {
1232                 printf("Unknown RADIUS message code\n");
1233                 return RADIUS_RX_UNKNOWN;
1234         }
1235
1236         sm->radius_identifier = -1;
1237         wpa_printf(MSG_DEBUG, "RADIUS packet matching with station " MACSTR,
1238                    MAC2STR(sta->addr));
1239
1240         if (sm->last_recv_radius) {
1241                 radius_msg_free(sm->last_recv_radius);
1242                 os_free(sm->last_recv_radius);
1243         }
1244
1245         sm->last_recv_radius = msg;
1246
1247         session_timeout_set =
1248                 !radius_msg_get_attr_int32(msg, RADIUS_ATTR_SESSION_TIMEOUT,
1249                                            &session_timeout);
1250         if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_TERMINATION_ACTION,
1251                                       &termination_action))
1252                 termination_action = RADIUS_TERMINATION_ACTION_DEFAULT;
1253
1254         if (hapd->conf->acct_interim_interval == 0 &&
1255             msg->hdr->code == RADIUS_CODE_ACCESS_ACCEPT &&
1256             radius_msg_get_attr_int32(msg, RADIUS_ATTR_ACCT_INTERIM_INTERVAL,
1257                                       &acct_interim_interval) == 0) {
1258                 if (acct_interim_interval < 60) {
1259                         hostapd_logger(hapd, sta->addr,
1260                                        HOSTAPD_MODULE_IEEE8021X,
1261                                        HOSTAPD_LEVEL_INFO,
1262                                        "ignored too small "
1263                                        "Acct-Interim-Interval %d",
1264                                        acct_interim_interval);
1265                 } else
1266                         sta->acct_interim_interval = acct_interim_interval;
1267         }
1268
1269
1270         switch (msg->hdr->code) {
1271         case RADIUS_CODE_ACCESS_ACCEPT:
1272                 if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
1273                         sta->vlan_id = 0;
1274 #ifndef CONFIG_NO_VLAN
1275                 else {
1276                         old_vlanid = sta->vlan_id;
1277                         sta->vlan_id = radius_msg_get_vlanid(msg);
1278                 }
1279                 if (sta->vlan_id > 0 &&
1280                     hostapd_get_vlan_id_ifname(hapd->conf->vlan,
1281                                                sta->vlan_id)) {
1282                         hostapd_logger(hapd, sta->addr,
1283                                        HOSTAPD_MODULE_RADIUS,
1284                                        HOSTAPD_LEVEL_INFO,
1285                                        "VLAN ID %d", sta->vlan_id);
1286                 } else if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_REQUIRED) {
1287                         sta->eapol_sm->authFail = TRUE;
1288                         hostapd_logger(hapd, sta->addr,
1289                                        HOSTAPD_MODULE_IEEE8021X,
1290                                        HOSTAPD_LEVEL_INFO, "authentication "
1291                                        "server did not include required VLAN "
1292                                        "ID in Access-Accept");
1293                         break;
1294                 }
1295 #endif /* CONFIG_NO_VLAN */
1296
1297                 ap_sta_bind_vlan(hapd, sta, old_vlanid);
1298
1299                 /* RFC 3580, Ch. 3.17 */
1300                 if (session_timeout_set && termination_action ==
1301                     RADIUS_TERMINATION_ACTION_RADIUS_REQUEST) {
1302                         sm->reAuthPeriod = session_timeout;
1303                 } else if (session_timeout_set)
1304                         ap_sta_session_timeout(hapd, sta, session_timeout);
1305
1306                 sm->eap_if->aaaSuccess = TRUE;
1307                 override_eapReq = 1;
1308                 ieee802_1x_get_keys(hapd, sta, msg, req, shared_secret,
1309                                     shared_secret_len);
1310                 ieee802_1x_store_radius_class(hapd, sta, msg);
1311                 ieee802_1x_update_sta_identity(hapd, sta, msg);
1312                 if (sm->eap_if->eapKeyAvailable &&
1313                     wpa_auth_pmksa_add(sta->wpa_sm, sm->eapol_key_crypt,
1314                                        session_timeout_set ?
1315                                        (int) session_timeout : -1, sm) == 0) {
1316                         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
1317                                        HOSTAPD_LEVEL_DEBUG,
1318                                        "Added PMKSA cache entry");
1319                 }
1320                 break;
1321         case RADIUS_CODE_ACCESS_REJECT:
1322                 sm->eap_if->aaaFail = TRUE;
1323                 override_eapReq = 1;
1324                 break;
1325         case RADIUS_CODE_ACCESS_CHALLENGE:
1326                 sm->eap_if->aaaEapReq = TRUE;
1327                 if (session_timeout_set) {
1328                         /* RFC 2869, Ch. 2.3.2; RFC 3580, Ch. 3.17 */
1329                         sm->eap_if->aaaMethodTimeout = session_timeout;
1330                         hostapd_logger(hapd, sm->addr,
1331                                        HOSTAPD_MODULE_IEEE8021X,
1332                                        HOSTAPD_LEVEL_DEBUG,
1333                                        "using EAP timeout of %d seconds (from "
1334                                        "RADIUS)",
1335                                        sm->eap_if->aaaMethodTimeout);
1336                 } else {
1337                         /*
1338                          * Use dynamic retransmission behavior per EAP
1339                          * specification.
1340                          */
1341                         sm->eap_if->aaaMethodTimeout = 0;
1342                 }
1343                 break;
1344         }
1345
1346         ieee802_1x_decapsulate_radius(hapd, sta);
1347         if (override_eapReq)
1348                 sm->eap_if->aaaEapReq = FALSE;
1349
1350         eapol_auth_step(sm);
1351
1352         return RADIUS_RX_QUEUED;
1353 }
1354 #endif /* CONFIG_NO_RADIUS */
1355
1356
1357 void ieee802_1x_abort_auth(struct hostapd_data *hapd, struct sta_info *sta)
1358 {
1359         struct eapol_state_machine *sm = sta->eapol_sm;
1360         if (sm == NULL)
1361                 return;
1362
1363         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1364                        HOSTAPD_LEVEL_DEBUG, "aborting authentication");
1365
1366 #ifndef CONFIG_NO_RADIUS
1367         if (sm->last_recv_radius) {
1368                 radius_msg_free(sm->last_recv_radius);
1369                 os_free(sm->last_recv_radius);
1370                 sm->last_recv_radius = NULL;
1371         }
1372 #endif /* CONFIG_NO_RADIUS */
1373
1374         if (sm->eap_if->eapTimeout) {
1375                 /*
1376                  * Disconnect the STA since it did not reply to the last EAP
1377                  * request and we cannot continue EAP processing (EAP-Failure
1378                  * could only be sent if the EAP peer actually replied).
1379                  */
1380                 sm->eap_if->portEnabled = FALSE;
1381                 hostapd_sta_deauth(hapd, sta->addr,
1382                                    WLAN_REASON_PREV_AUTH_NOT_VALID);
1383                 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC |
1384                                 WLAN_STA_AUTHORIZED);
1385                 eloop_cancel_timeout(ap_handle_timer, hapd, sta);
1386                 eloop_register_timeout(0, 0, ap_handle_timer, hapd, sta);
1387                 sta->timeout_next = STA_REMOVE;
1388         }
1389 }
1390
1391
1392 static int ieee802_1x_rekey_broadcast(struct hostapd_data *hapd)
1393 {
1394         struct eapol_authenticator *eapol = hapd->eapol_auth;
1395
1396         if (hapd->conf->default_wep_key_len < 1)
1397                 return 0;
1398
1399         os_free(eapol->default_wep_key);
1400         eapol->default_wep_key = os_malloc(hapd->conf->default_wep_key_len);
1401         if (eapol->default_wep_key == NULL ||
1402             os_get_random(eapol->default_wep_key,
1403                           hapd->conf->default_wep_key_len)) {
1404                 printf("Could not generate random WEP key.\n");
1405                 os_free(eapol->default_wep_key);
1406                 eapol->default_wep_key = NULL;
1407                 return -1;
1408         }
1409
1410         wpa_hexdump_key(MSG_DEBUG, "IEEE 802.1X: New default WEP key",
1411                         eapol->default_wep_key,
1412                         hapd->conf->default_wep_key_len);
1413
1414         return 0;
1415 }
1416
1417
1418 static int ieee802_1x_sta_key_available(struct hostapd_data *hapd,
1419                                         struct sta_info *sta, void *ctx)
1420 {
1421         if (sta->eapol_sm) {
1422                 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
1423                 eapol_auth_step(sta->eapol_sm);
1424         }
1425         return 0;
1426 }
1427
1428
1429 static void ieee802_1x_rekey(void *eloop_ctx, void *timeout_ctx)
1430 {
1431         struct hostapd_data *hapd = eloop_ctx;
1432         struct eapol_authenticator *eapol = hapd->eapol_auth;
1433
1434         if (eapol->default_wep_key_idx >= 3)
1435                 eapol->default_wep_key_idx =
1436                         hapd->conf->individual_wep_key_len > 0 ? 1 : 0;
1437         else
1438                 eapol->default_wep_key_idx++;
1439
1440         wpa_printf(MSG_DEBUG, "IEEE 802.1X: New default WEP key index %d",
1441                    eapol->default_wep_key_idx);
1442
1443         if (ieee802_1x_rekey_broadcast(hapd)) {
1444                 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1445                                HOSTAPD_LEVEL_WARNING, "failed to generate a "
1446                                "new broadcast key");
1447                 os_free(eapol->default_wep_key);
1448                 eapol->default_wep_key = NULL;
1449                 return;
1450         }
1451
1452         /* TODO: Could setup key for RX here, but change default TX keyid only
1453          * after new broadcast key has been sent to all stations. */
1454         if (hostapd_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP, NULL,
1455                             eapol->default_wep_key_idx, 1, NULL, 0,
1456                             eapol->default_wep_key,
1457                             hapd->conf->default_wep_key_len)) {
1458                 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1459                                HOSTAPD_LEVEL_WARNING, "failed to configure a "
1460                                "new broadcast key");
1461                 os_free(eapol->default_wep_key);
1462                 eapol->default_wep_key = NULL;
1463                 return;
1464         }
1465
1466         ap_for_each_sta(hapd, ieee802_1x_sta_key_available, NULL);
1467
1468         if (hapd->conf->wep_rekeying_period > 0) {
1469                 eloop_register_timeout(hapd->conf->wep_rekeying_period, 0,
1470                                        ieee802_1x_rekey, hapd, NULL);
1471         }
1472 }
1473
1474
1475 static void ieee802_1x_eapol_send(void *ctx, void *sta_ctx, u8 type,
1476                                   const u8 *data, size_t datalen)
1477 {
1478         ieee802_1x_send(ctx, sta_ctx, type, data, datalen);
1479 }
1480
1481
1482 static void ieee802_1x_aaa_send(void *ctx, void *sta_ctx,
1483                                 const u8 *data, size_t datalen)
1484 {
1485 #ifndef CONFIG_NO_RADIUS
1486         struct hostapd_data *hapd = ctx;
1487         struct sta_info *sta = sta_ctx;
1488
1489         ieee802_1x_encapsulate_radius(hapd, sta, data, datalen);
1490 #endif /* CONFIG_NO_RADIUS */
1491 }
1492
1493
1494 static void _ieee802_1x_finished(void *ctx, void *sta_ctx, int success,
1495                                  int preauth)
1496 {
1497         struct hostapd_data *hapd = ctx;
1498         struct sta_info *sta = sta_ctx;
1499         if (preauth)
1500                 rsn_preauth_finished(hapd, sta, success);
1501         else
1502                 ieee802_1x_finished(hapd, sta, success);
1503 }
1504
1505
1506 static int ieee802_1x_get_eap_user(void *ctx, const u8 *identity,
1507                                    size_t identity_len, int phase2,
1508                                    struct eap_user *user)
1509 {
1510         struct hostapd_data *hapd = ctx;
1511         const struct hostapd_eap_user *eap_user;
1512         int i, count;
1513
1514         eap_user = hostapd_get_eap_user(hapd->conf, identity,
1515                                         identity_len, phase2);
1516         if (eap_user == NULL)
1517                 return -1;
1518
1519         os_memset(user, 0, sizeof(*user));
1520         user->phase2 = phase2;
1521         count = EAP_USER_MAX_METHODS;
1522         if (count > EAP_MAX_METHODS)
1523                 count = EAP_MAX_METHODS;
1524         for (i = 0; i < count; i++) {
1525                 user->methods[i].vendor = eap_user->methods[i].vendor;
1526                 user->methods[i].method = eap_user->methods[i].method;
1527         }
1528
1529         if (eap_user->password) {
1530                 user->password = os_malloc(eap_user->password_len);
1531                 if (user->password == NULL)
1532                         return -1;
1533                 os_memcpy(user->password, eap_user->password,
1534                           eap_user->password_len);
1535                 user->password_len = eap_user->password_len;
1536         }
1537         user->force_version = eap_user->force_version;
1538         user->ttls_auth = eap_user->ttls_auth;
1539
1540         return 0;
1541 }
1542
1543
1544 static int ieee802_1x_sta_entry_alive(void *ctx, const u8 *addr)
1545 {
1546         struct hostapd_data *hapd = ctx;
1547         struct sta_info *sta;
1548         sta = ap_get_sta(hapd, addr);
1549         if (sta == NULL || sta->eapol_sm == NULL)
1550                 return 0;
1551         return 1;
1552 }
1553
1554
1555 static void ieee802_1x_logger(void *ctx, const u8 *addr,
1556                               eapol_logger_level level, const char *txt)
1557 {
1558 #ifndef CONFIG_NO_HOSTAPD_LOGGER
1559         struct hostapd_data *hapd = ctx;
1560         int hlevel;
1561
1562         switch (level) {
1563         case EAPOL_LOGGER_WARNING:
1564                 hlevel = HOSTAPD_LEVEL_WARNING;
1565                 break;
1566         case EAPOL_LOGGER_INFO:
1567                 hlevel = HOSTAPD_LEVEL_INFO;
1568                 break;
1569         case EAPOL_LOGGER_DEBUG:
1570         default:
1571                 hlevel = HOSTAPD_LEVEL_DEBUG;
1572                 break;
1573         }
1574
1575         hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE8021X, hlevel, "%s",
1576                        txt);
1577 #endif /* CONFIG_NO_HOSTAPD_LOGGER */
1578 }
1579
1580
1581 static void ieee802_1x_set_port_authorized(void *ctx, void *sta_ctx,
1582                                            int authorized)
1583 {
1584         struct hostapd_data *hapd = ctx;
1585         struct sta_info *sta = sta_ctx;
1586         ieee802_1x_set_sta_authorized(hapd, sta, authorized);
1587 }
1588
1589
1590 static void _ieee802_1x_abort_auth(void *ctx, void *sta_ctx)
1591 {
1592         struct hostapd_data *hapd = ctx;
1593         struct sta_info *sta = sta_ctx;
1594         ieee802_1x_abort_auth(hapd, sta);
1595 }
1596
1597
1598 static void _ieee802_1x_tx_key(void *ctx, void *sta_ctx)
1599 {
1600         struct hostapd_data *hapd = ctx;
1601         struct sta_info *sta = sta_ctx;
1602         ieee802_1x_tx_key(hapd, sta);
1603 }
1604
1605
1606 static void ieee802_1x_eapol_event(void *ctx, void *sta_ctx,
1607                                    enum eapol_event type)
1608 {
1609         /* struct hostapd_data *hapd = ctx; */
1610         struct sta_info *sta = sta_ctx;
1611         switch (type) {
1612         case EAPOL_AUTH_SM_CHANGE:
1613                 wpa_auth_sm_notify(sta->wpa_sm);
1614                 break;
1615         case EAPOL_AUTH_REAUTHENTICATE:
1616                 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
1617                 break;
1618         }
1619 }
1620
1621
1622 int ieee802_1x_init(struct hostapd_data *hapd)
1623 {
1624         int i;
1625         struct eapol_auth_config conf;
1626         struct eapol_auth_cb cb;
1627
1628         os_memset(&conf, 0, sizeof(conf));
1629         conf.ctx = hapd;
1630         conf.eap_reauth_period = hapd->conf->eap_reauth_period;
1631         conf.wpa = hapd->conf->wpa;
1632         conf.individual_wep_key_len = hapd->conf->individual_wep_key_len;
1633         conf.eap_server = hapd->conf->eap_server;
1634         conf.ssl_ctx = hapd->ssl_ctx;
1635         conf.eap_sim_db_priv = hapd->eap_sim_db_priv;
1636         conf.eap_req_id_text = hapd->conf->eap_req_id_text;
1637         conf.eap_req_id_text_len = hapd->conf->eap_req_id_text_len;
1638         conf.pac_opaque_encr_key = hapd->conf->pac_opaque_encr_key;
1639         conf.eap_fast_a_id = hapd->conf->eap_fast_a_id;
1640         conf.eap_fast_a_id_len = hapd->conf->eap_fast_a_id_len;
1641         conf.eap_fast_a_id_info = hapd->conf->eap_fast_a_id_info;
1642         conf.eap_fast_prov = hapd->conf->eap_fast_prov;
1643         conf.pac_key_lifetime = hapd->conf->pac_key_lifetime;
1644         conf.pac_key_refresh_time = hapd->conf->pac_key_refresh_time;
1645         conf.eap_sim_aka_result_ind = hapd->conf->eap_sim_aka_result_ind;
1646         conf.tnc = hapd->conf->tnc;
1647         conf.wps = hapd->wps;
1648
1649         os_memset(&cb, 0, sizeof(cb));
1650         cb.eapol_send = ieee802_1x_eapol_send;
1651         cb.aaa_send = ieee802_1x_aaa_send;
1652         cb.finished = _ieee802_1x_finished;
1653         cb.get_eap_user = ieee802_1x_get_eap_user;
1654         cb.sta_entry_alive = ieee802_1x_sta_entry_alive;
1655         cb.logger = ieee802_1x_logger;
1656         cb.set_port_authorized = ieee802_1x_set_port_authorized;
1657         cb.abort_auth = _ieee802_1x_abort_auth;
1658         cb.tx_key = _ieee802_1x_tx_key;
1659         cb.eapol_event = ieee802_1x_eapol_event;
1660
1661         hapd->eapol_auth = eapol_auth_init(&conf, &cb);
1662         if (hapd->eapol_auth == NULL)
1663                 return -1;
1664
1665         if ((hapd->conf->ieee802_1x || hapd->conf->wpa) &&
1666             hostapd_set_ieee8021x(hapd->conf->iface, hapd, 1))
1667                 return -1;
1668
1669 #ifndef CONFIG_NO_RADIUS
1670         if (radius_client_register(hapd->radius, RADIUS_AUTH,
1671                                    ieee802_1x_receive_auth, hapd))
1672                 return -1;
1673 #endif /* CONFIG_NO_RADIUS */
1674
1675         if (hapd->conf->default_wep_key_len) {
1676                 hostapd_set_privacy(hapd, 1);
1677
1678                 for (i = 0; i < 4; i++)
1679                         hostapd_set_key(hapd->conf->iface, hapd, WPA_ALG_NONE,
1680                                         NULL, i, 0, NULL, 0, NULL, 0);
1681
1682                 ieee802_1x_rekey(hapd, NULL);
1683
1684                 if (hapd->eapol_auth->default_wep_key == NULL)
1685                         return -1;
1686         }
1687
1688         return 0;
1689 }
1690
1691
1692 void ieee802_1x_deinit(struct hostapd_data *hapd)
1693 {
1694         eloop_cancel_timeout(ieee802_1x_rekey, hapd, NULL);
1695
1696         if (hapd->driver != NULL &&
1697             (hapd->conf->ieee802_1x || hapd->conf->wpa))
1698                 hostapd_set_ieee8021x(hapd->conf->iface, hapd, 0);
1699
1700         eapol_auth_deinit(hapd->eapol_auth);
1701         hapd->eapol_auth = NULL;
1702 }
1703
1704
1705 int ieee802_1x_reconfig(struct hostapd_data *hapd,
1706                         struct hostapd_config *oldconf,
1707                         struct hostapd_bss_config *oldbss)
1708 {
1709         ieee802_1x_deinit(hapd);
1710         return ieee802_1x_init(hapd);
1711 }
1712
1713
1714 int ieee802_1x_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
1715                          const u8 *buf, size_t len, int ack)
1716 {
1717         struct ieee80211_hdr *hdr;
1718         struct ieee802_1x_hdr *xhdr;
1719         struct ieee802_1x_eapol_key *key;
1720         u8 *pos;
1721         const unsigned char rfc1042_hdr[ETH_ALEN] =
1722                 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
1723
1724         if (sta == NULL)
1725                 return -1;
1726         if (len < sizeof(*hdr) + sizeof(rfc1042_hdr) + 2 + sizeof(*xhdr))
1727                 return 0;
1728
1729         hdr = (struct ieee80211_hdr *) buf;
1730         pos = (u8 *) (hdr + 1);
1731         if (os_memcmp(pos, rfc1042_hdr, sizeof(rfc1042_hdr)) != 0)
1732                 return 0;
1733         pos += sizeof(rfc1042_hdr);
1734         if (WPA_GET_BE16(pos) != ETH_P_PAE)
1735                 return 0;
1736         pos += 2;
1737
1738         xhdr = (struct ieee802_1x_hdr *) pos;
1739         pos += sizeof(*xhdr);
1740
1741         wpa_printf(MSG_DEBUG, "IEEE 802.1X: " MACSTR " TX status - version=%d "
1742                    "type=%d length=%d - ack=%d",
1743                    MAC2STR(sta->addr), xhdr->version, xhdr->type,
1744                    be_to_host16(xhdr->length), ack);
1745
1746         /* EAPOL EAP-Packet packets are eventually re-sent by either Supplicant
1747          * or Authenticator state machines, but EAPOL-Key packets are not
1748          * retransmitted in case of failure. Try to re-sent failed EAPOL-Key
1749          * packets couple of times because otherwise STA keys become
1750          * unsynchronized with AP. */
1751         if (xhdr->type == IEEE802_1X_TYPE_EAPOL_KEY && !ack &&
1752             pos + sizeof(*key) <= buf + len) {
1753                 key = (struct ieee802_1x_eapol_key *) pos;
1754                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1755                                HOSTAPD_LEVEL_DEBUG, "did not Ack EAPOL-Key "
1756                                "frame (%scast index=%d)",
1757                                key->key_index & BIT(7) ? "uni" : "broad",
1758                                key->key_index & ~BIT(7));
1759                 /* TODO: re-send EAPOL-Key couple of times (with short delay
1760                  * between them?). If all attempt fail, report error and
1761                  * deauthenticate STA so that it will get new keys when
1762                  * authenticating again (e.g., after returning in range).
1763                  * Separate limit/transmit state needed both for unicast and
1764                  * broadcast keys(?) */
1765         }
1766         /* TODO: could move unicast key configuration from ieee802_1x_tx_key()
1767          * to here and change the key only if the EAPOL-Key packet was Acked.
1768          */
1769
1770         return 1;
1771 }
1772
1773
1774 u8 * ieee802_1x_get_identity(struct eapol_state_machine *sm, size_t *len)
1775 {
1776         if (sm == NULL || sm->identity == NULL)
1777                 return NULL;
1778
1779         *len = sm->identity_len;
1780         return sm->identity;
1781 }
1782
1783
1784 u8 * ieee802_1x_get_radius_class(struct eapol_state_machine *sm, size_t *len,
1785                                  int idx)
1786 {
1787         if (sm == NULL || sm->radius_class.attr == NULL ||
1788             idx >= (int) sm->radius_class.count)
1789                 return NULL;
1790
1791         *len = sm->radius_class.attr[idx].len;
1792         return sm->radius_class.attr[idx].data;
1793 }
1794
1795
1796 const u8 * ieee802_1x_get_key(struct eapol_state_machine *sm, size_t *len)
1797 {
1798         if (sm == NULL)
1799                 return NULL;
1800
1801         *len = sm->eap_if->eapKeyDataLen;
1802         return sm->eap_if->eapKeyData;
1803 }
1804
1805
1806 void ieee802_1x_notify_port_enabled(struct eapol_state_machine *sm,
1807                                     int enabled)
1808 {
1809         if (sm == NULL)
1810                 return;
1811         sm->eap_if->portEnabled = enabled ? TRUE : FALSE;
1812         eapol_auth_step(sm);
1813 }
1814
1815
1816 void ieee802_1x_notify_port_valid(struct eapol_state_machine *sm,
1817                                   int valid)
1818 {
1819         if (sm == NULL)
1820                 return;
1821         sm->portValid = valid ? TRUE : FALSE;
1822         eapol_auth_step(sm);
1823 }
1824
1825
1826 void ieee802_1x_notify_pre_auth(struct eapol_state_machine *sm, int pre_auth)
1827 {
1828         if (sm == NULL)
1829                 return;
1830         if (pre_auth)
1831                 sm->flags |= EAPOL_SM_PREAUTH;
1832         else
1833                 sm->flags &= ~EAPOL_SM_PREAUTH;
1834 }
1835
1836
1837 static const char * bool_txt(Boolean bool)
1838 {
1839         return bool ? "TRUE" : "FALSE";
1840 }
1841
1842
1843 int ieee802_1x_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
1844 {
1845         /* TODO */
1846         return 0;
1847 }
1848
1849
1850 int ieee802_1x_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
1851                            char *buf, size_t buflen)
1852 {
1853         int len = 0, ret;
1854         struct eapol_state_machine *sm = sta->eapol_sm;
1855
1856         if (sm == NULL)
1857                 return 0;
1858
1859         ret = os_snprintf(buf + len, buflen - len,
1860                           "dot1xPaePortNumber=%d\n"
1861                           "dot1xPaePortProtocolVersion=%d\n"
1862                           "dot1xPaePortCapabilities=1\n"
1863                           "dot1xPaePortInitialize=%d\n"
1864                           "dot1xPaePortReauthenticate=FALSE\n",
1865                           sta->aid,
1866                           EAPOL_VERSION,
1867                           sm->initialize);
1868         if (ret < 0 || (size_t) ret >= buflen - len)
1869                 return len;
1870         len += ret;
1871
1872         /* dot1xAuthConfigTable */
1873         ret = os_snprintf(buf + len, buflen - len,
1874                           "dot1xAuthPaeState=%d\n"
1875                           "dot1xAuthBackendAuthState=%d\n"
1876                           "dot1xAuthAdminControlledDirections=%d\n"
1877                           "dot1xAuthOperControlledDirections=%d\n"
1878                           "dot1xAuthAuthControlledPortStatus=%d\n"
1879                           "dot1xAuthAuthControlledPortControl=%d\n"
1880                           "dot1xAuthQuietPeriod=%u\n"
1881                           "dot1xAuthServerTimeout=%u\n"
1882                           "dot1xAuthReAuthPeriod=%u\n"
1883                           "dot1xAuthReAuthEnabled=%s\n"
1884                           "dot1xAuthKeyTxEnabled=%s\n",
1885                           sm->auth_pae_state + 1,
1886                           sm->be_auth_state + 1,
1887                           sm->adminControlledDirections,
1888                           sm->operControlledDirections,
1889                           sm->authPortStatus,
1890                           sm->portControl,
1891                           sm->quietPeriod,
1892                           sm->serverTimeout,
1893                           sm->reAuthPeriod,
1894                           bool_txt(sm->reAuthEnabled),
1895                           bool_txt(sm->keyTxEnabled));
1896         if (ret < 0 || (size_t) ret >= buflen - len)
1897                 return len;
1898         len += ret;
1899
1900         /* dot1xAuthStatsTable */
1901         ret = os_snprintf(buf + len, buflen - len,
1902                           "dot1xAuthEapolFramesRx=%u\n"
1903                           "dot1xAuthEapolFramesTx=%u\n"
1904                           "dot1xAuthEapolStartFramesRx=%u\n"
1905                           "dot1xAuthEapolLogoffFramesRx=%u\n"
1906                           "dot1xAuthEapolRespIdFramesRx=%u\n"
1907                           "dot1xAuthEapolRespFramesRx=%u\n"
1908                           "dot1xAuthEapolReqIdFramesTx=%u\n"
1909                           "dot1xAuthEapolReqFramesTx=%u\n"
1910                           "dot1xAuthInvalidEapolFramesRx=%u\n"
1911                           "dot1xAuthEapLengthErrorFramesRx=%u\n"
1912                           "dot1xAuthLastEapolFrameVersion=%u\n"
1913                           "dot1xAuthLastEapolFrameSource=" MACSTR "\n",
1914                           sm->dot1xAuthEapolFramesRx,
1915                           sm->dot1xAuthEapolFramesTx,
1916                           sm->dot1xAuthEapolStartFramesRx,
1917                           sm->dot1xAuthEapolLogoffFramesRx,
1918                           sm->dot1xAuthEapolRespIdFramesRx,
1919                           sm->dot1xAuthEapolRespFramesRx,
1920                           sm->dot1xAuthEapolReqIdFramesTx,
1921                           sm->dot1xAuthEapolReqFramesTx,
1922                           sm->dot1xAuthInvalidEapolFramesRx,
1923                           sm->dot1xAuthEapLengthErrorFramesRx,
1924                           sm->dot1xAuthLastEapolFrameVersion,
1925                           MAC2STR(sm->addr));
1926         if (ret < 0 || (size_t) ret >= buflen - len)
1927                 return len;
1928         len += ret;
1929
1930         /* dot1xAuthDiagTable */
1931         ret = os_snprintf(buf + len, buflen - len,
1932                           "dot1xAuthEntersConnecting=%u\n"
1933                           "dot1xAuthEapLogoffsWhileConnecting=%u\n"
1934                           "dot1xAuthEntersAuthenticating=%u\n"
1935                           "dot1xAuthAuthSuccessesWhileAuthenticating=%u\n"
1936                           "dot1xAuthAuthTimeoutsWhileAuthenticating=%u\n"
1937                           "dot1xAuthAuthFailWhileAuthenticating=%u\n"
1938                           "dot1xAuthAuthEapStartsWhileAuthenticating=%u\n"
1939                           "dot1xAuthAuthEapLogoffWhileAuthenticating=%u\n"
1940                           "dot1xAuthAuthReauthsWhileAuthenticated=%u\n"
1941                           "dot1xAuthAuthEapStartsWhileAuthenticated=%u\n"
1942                           "dot1xAuthAuthEapLogoffWhileAuthenticated=%u\n"
1943                           "dot1xAuthBackendResponses=%u\n"
1944                           "dot1xAuthBackendAccessChallenges=%u\n"
1945                           "dot1xAuthBackendOtherRequestsToSupplicant=%u\n"
1946                           "dot1xAuthBackendAuthSuccesses=%u\n"
1947                           "dot1xAuthBackendAuthFails=%u\n",
1948                           sm->authEntersConnecting,
1949                           sm->authEapLogoffsWhileConnecting,
1950                           sm->authEntersAuthenticating,
1951                           sm->authAuthSuccessesWhileAuthenticating,
1952                           sm->authAuthTimeoutsWhileAuthenticating,
1953                           sm->authAuthFailWhileAuthenticating,
1954                           sm->authAuthEapStartsWhileAuthenticating,
1955                           sm->authAuthEapLogoffWhileAuthenticating,
1956                           sm->authAuthReauthsWhileAuthenticated,
1957                           sm->authAuthEapStartsWhileAuthenticated,
1958                           sm->authAuthEapLogoffWhileAuthenticated,
1959                           sm->backendResponses,
1960                           sm->backendAccessChallenges,
1961                           sm->backendOtherRequestsToSupplicant,
1962                           sm->backendAuthSuccesses,
1963                           sm->backendAuthFails);
1964         if (ret < 0 || (size_t) ret >= buflen - len)
1965                 return len;
1966         len += ret;
1967
1968         /* dot1xAuthSessionStatsTable */
1969         ret = os_snprintf(buf + len, buflen - len,
1970                           /* TODO: dot1xAuthSessionOctetsRx */
1971                           /* TODO: dot1xAuthSessionOctetsTx */
1972                           /* TODO: dot1xAuthSessionFramesRx */
1973                           /* TODO: dot1xAuthSessionFramesTx */
1974                           "dot1xAuthSessionId=%08X-%08X\n"
1975                           "dot1xAuthSessionAuthenticMethod=%d\n"
1976                           "dot1xAuthSessionTime=%u\n"
1977                           "dot1xAuthSessionTerminateCause=999\n"
1978                           "dot1xAuthSessionUserName=%s\n",
1979                           sta->acct_session_id_hi, sta->acct_session_id_lo,
1980                           (wpa_key_mgmt_wpa_ieee8021x(
1981                                    wpa_auth_sta_key_mgmt(sta->wpa_sm))) ?
1982                           1 : 2,
1983                           (unsigned int) (time(NULL) -
1984                                           sta->acct_session_start),
1985                           sm->identity);
1986         if (ret < 0 || (size_t) ret >= buflen - len)
1987                 return len;
1988         len += ret;
1989
1990         return len;
1991 }
1992
1993
1994 static void ieee802_1x_finished(struct hostapd_data *hapd,
1995                                 struct sta_info *sta, int success)
1996 {
1997         const u8 *key;
1998         size_t len;
1999         /* TODO: get PMKLifetime from WPA parameters */
2000         static const int dot11RSNAConfigPMKLifetime = 43200;
2001
2002         key = ieee802_1x_get_key(sta->eapol_sm, &len);
2003         if (success && key && len >= PMK_LEN &&
2004             wpa_auth_pmksa_add(sta->wpa_sm, key, dot11RSNAConfigPMKLifetime,
2005                                sta->eapol_sm) == 0) {
2006                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
2007                                HOSTAPD_LEVEL_DEBUG,
2008                                "Added PMKSA cache entry (IEEE 802.1X)");
2009         }
2010 }