src/ap/ieee802_1x.c

   1 /*
   2  * hostapd / IEEE 802.1X-2004 Authenticator
   3  * Copyright (c) 2002-2011, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #include "utils/includes.h"
  16
  17 #include "utils/common.h"
  18 #include "utils/eloop.h"
  19 #include "crypto/md5.h"
  20 #include "crypto/crypto.h"
  21 #include "crypto/random.h"
  22 #include "common/ieee802_11_defs.h"
  23 #include "common/wpa_ctrl.h"
  24 #include "radius/radius.h"
  25 #include "radius/radius_client.h"
  26 #include "eap_server/eap.h"
  27 #include "eap_common/eap_wsc_common.h"
  28 #include "eapol_auth/eapol_auth_sm.h"
  29 #include "eapol_auth/eapol_auth_sm_i.h"
  30 #include "hostapd.h"
  31 #include "accounting.h"
  32 #include "sta_info.h"
  33 #include "wpa_auth.h"
  34 #include "preauth_auth.h"
  35 #include "pmksa_cache_auth.h"
  36 #include "ap_config.h"
  37 #include "ap_drv_ops.h"
  38 #include "ieee802_1x.h"
  39
  40
  41 static void ieee802_1x_finished(struct hostapd_data *hapd,
  42                                 struct sta_info *sta, int success);
  43
  44
  45 static void ieee802_1x_send(struct hostapd_data *hapd, struct sta_info *sta,
  46                             u8 type, const u8 *data, size_t datalen)
  47 {
  48         u8 *buf;
  49         struct ieee802_1x_hdr *xhdr;
  50         size_t len;
  51         int encrypt = 0;
  52
  53         len = sizeof(*xhdr) + datalen;
  54         buf = os_zalloc(len);
  55         if (buf == NULL) {
  56                 wpa_printf(MSG_ERROR, "malloc() failed for "
  57                            "ieee802_1x_send(len=%lu)",
  58                            (unsigned long) len);
  59                 return;
  60         }
  61
  62         xhdr = (struct ieee802_1x_hdr *) buf;
  63         xhdr->version = hapd->conf->eapol_version;
  64         xhdr->type = type;
  65         xhdr->length = host_to_be16(datalen);
  66
  67         if (datalen > 0 && data != NULL)
  68                 os_memcpy(xhdr + 1, data, datalen);
  69
  70         if (wpa_auth_pairwise_set(sta->wpa_sm))
  71                 encrypt = 1;
  72         if (sta->flags & WLAN_STA_PREAUTH) {
  73                 rsn_preauth_send(hapd, sta, buf, len);
  74         } else {
  75                 hostapd_drv_hapd_send_eapol(hapd, sta->addr, buf, len,
  76                                             encrypt, sta->flags);
  77         }
  78
  79         os_free(buf);
  80 }
  81
  82
  83 void ieee802_1x_set_sta_authorized(struct hostapd_data *hapd,
  84                                    struct sta_info *sta, int authorized)
  85 {
  86         int res;
  87
  88         if (sta->flags & WLAN_STA_PREAUTH)
  89                 return;
  90
  91         if (authorized) {
  92                 if (!ap_sta_is_authorized(sta))
  93                         wpa_msg(hapd->msg_ctx, MSG_INFO,
  94                                 AP_STA_CONNECTED MACSTR, MAC2STR(sta->addr));
  95                 ap_sta_set_authorized(hapd, sta, 1);
  96                 res = hostapd_set_authorized(hapd, sta, 1);
  97                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
  98                                HOSTAPD_LEVEL_DEBUG, "authorizing port");
  99         } else {
 100                 if (ap_sta_is_authorized(sta) && (sta->flags & WLAN_STA_ASSOC))
 101                         wpa_msg(hapd->msg_ctx, MSG_INFO,
 102                                 AP_STA_DISCONNECTED MACSTR,
 103                                 MAC2STR(sta->addr));
 104                 ap_sta_set_authorized(hapd, sta, 0);
 105                 res = hostapd_set_authorized(hapd, sta, 0);
 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 (random_get_bytes(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             random_get_bytes(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_drv_set_key(ifname, hapd, WPA_ALG_WEP,
 235                                 broadcast_ether_addr, key->idx, 1,
 236                                 NULL, 0, key->key[key->idx],
 237                                 key->len[key->idx]))
 238                 printf("Could not set dynamic VLAN WEP encryption key.\n");
 239
 240         hostapd_set_drv_ieee8021x(hapd, ifname, 1);
 241
 242         return key;
 243 }
 244
 245
 246 static struct hostapd_wep_keys *
 247 ieee802_1x_get_group(struct hostapd_data *hapd, struct hostapd_ssid *ssid,
 248                      size_t vlan_id)
 249 {
 250         const char *ifname;
 251
 252         if (vlan_id == 0)
 253                 return &ssid->wep;
 254
 255         if (vlan_id <= ssid->max_dyn_vlan_keys && ssid->dyn_vlan_keys &&
 256             ssid->dyn_vlan_keys[vlan_id])
 257                 return ssid->dyn_vlan_keys[vlan_id];
 258
 259         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Creating new group "
 260                    "state machine for VLAN ID %lu",
 261                    (unsigned long) vlan_id);
 262
 263         ifname = hostapd_get_vlan_id_ifname(hapd->conf->vlan, vlan_id);
 264         if (ifname == NULL) {
 265                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Unknown VLAN ID %lu - "
 266                            "cannot create group key state machine",
 267                            (unsigned long) vlan_id);
 268                 return NULL;
 269         }
 270
 271         if (ssid->dyn_vlan_keys == NULL) {
 272                 int size = (vlan_id + 1) * sizeof(ssid->dyn_vlan_keys[0]);
 273                 ssid->dyn_vlan_keys = os_zalloc(size);
 274                 if (ssid->dyn_vlan_keys == NULL)
 275                         return NULL;
 276                 ssid->max_dyn_vlan_keys = vlan_id;
 277         }
 278
 279         if (ssid->max_dyn_vlan_keys < vlan_id) {
 280                 struct hostapd_wep_keys **na;
 281                 int size = (vlan_id + 1) * sizeof(ssid->dyn_vlan_keys[0]);
 282                 na = os_realloc(ssid->dyn_vlan_keys, size);
 283                 if (na == NULL)
 284                         return NULL;
 285                 ssid->dyn_vlan_keys = na;
 286                 os_memset(&ssid->dyn_vlan_keys[ssid->max_dyn_vlan_keys + 1], 0,
 287                           (vlan_id - ssid->max_dyn_vlan_keys) *
 288                           sizeof(ssid->dyn_vlan_keys[0]));
 289                 ssid->max_dyn_vlan_keys = vlan_id;
 290         }
 291
 292         ssid->dyn_vlan_keys[vlan_id] = ieee802_1x_group_alloc(hapd, ifname);
 293
 294         return ssid->dyn_vlan_keys[vlan_id];
 295 }
 296 #endif /* CONFIG_NO_VLAN */
 297
 298
 299 void ieee802_1x_tx_key(struct hostapd_data *hapd, struct sta_info *sta)
 300 {
 301         struct eapol_authenticator *eapol = hapd->eapol_auth;
 302         struct eapol_state_machine *sm = sta->eapol_sm;
 303 #ifndef CONFIG_NO_VLAN
 304         struct hostapd_wep_keys *key = NULL;
 305         int vlan_id;
 306 #endif /* CONFIG_NO_VLAN */
 307
 308         if (sm == NULL || !sm->eap_if->eapKeyData)
 309                 return;
 310
 311         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key(s) to " MACSTR,
 312                    MAC2STR(sta->addr));
 313
 314 #ifndef CONFIG_NO_VLAN
 315         vlan_id = sta->vlan_id;
 316         if (vlan_id < 0 || vlan_id > MAX_VLAN_ID)
 317                 vlan_id = 0;
 318
 319         if (vlan_id) {
 320                 key = ieee802_1x_get_group(hapd, sta->ssid, vlan_id);
 321                 if (key && key->key[key->idx])
 322                         ieee802_1x_tx_key_one(hapd, sta, key->idx, 1,
 323                                               key->key[key->idx],
 324                                               key->len[key->idx]);
 325         } else
 326 #endif /* CONFIG_NO_VLAN */
 327         if (eapol->default_wep_key) {
 328                 ieee802_1x_tx_key_one(hapd, sta, eapol->default_wep_key_idx, 1,
 329                                       eapol->default_wep_key,
 330                                       hapd->conf->default_wep_key_len);
 331         }
 332
 333         if (hapd->conf->individual_wep_key_len > 0) {
 334                 u8 *ikey;
 335                 ikey = os_malloc(hapd->conf->individual_wep_key_len);
 336                 if (ikey == NULL ||
 337                     random_get_bytes(ikey, hapd->conf->individual_wep_key_len))
 338                 {
 339                         wpa_printf(MSG_ERROR, "Could not generate random "
 340                                    "individual WEP key.");
 341                         os_free(ikey);
 342                         return;
 343                 }
 344
 345                 wpa_hexdump_key(MSG_DEBUG, "Individual WEP key",
 346                                 ikey, hapd->conf->individual_wep_key_len);
 347
 348                 ieee802_1x_tx_key_one(hapd, sta, 0, 0, ikey,
 349                                       hapd->conf->individual_wep_key_len);
 350
 351                 /* TODO: set encryption in TX callback, i.e., only after STA
 352                  * has ACKed EAPOL-Key frame */
 353                 if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
 354                                         sta->addr, 0, 1, NULL, 0, ikey,
 355                                         hapd->conf->individual_wep_key_len)) {
 356                         wpa_printf(MSG_ERROR, "Could not set individual WEP "
 357                                    "encryption.");
 358                 }
 359
 360                 os_free(ikey);
 361         }
 362 }
 363
 364
 365 const char *radius_mode_txt(struct hostapd_data *hapd)
 366 {
 367         switch (hapd->iface->conf->hw_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 &&
 543             radius_msg_get_hdr(sm->last_recv_radius)->code ==
 544             RADIUS_CODE_ACCESS_CHALLENGE) {
 545                 int res = radius_msg_copy_attr(msg, sm->last_recv_radius,
 546                                                RADIUS_ATTR_STATE);
 547                 if (res < 0) {
 548                         printf("Could not copy State attribute from previous "
 549                                "Access-Challenge\n");
 550                         goto fail;
 551                 }
 552                 if (res > 0) {
 553                         wpa_printf(MSG_DEBUG, "Copied RADIUS State Attribute");
 554                 }
 555         }
 556
 557         if (radius_client_send(hapd->radius, msg, RADIUS_AUTH, sta->addr) < 0)
 558                 goto fail;
 559
 560         return;
 561
 562  fail:
 563         radius_msg_free(msg);
 564 }
 565 #endif /* CONFIG_NO_RADIUS */
 566
 567
 568 static void handle_eap_response(struct hostapd_data *hapd,
 569                                 struct sta_info *sta, struct eap_hdr *eap,
 570                                 size_t len)
 571 {
 572         u8 type, *data;
 573         struct eapol_state_machine *sm = sta->eapol_sm;
 574         if (sm == NULL)
 575                 return;
 576
 577         data = (u8 *) (eap + 1);
 578
 579         if (len < sizeof(*eap) + 1) {
 580                 printf("handle_eap_response: too short response data\n");
 581                 return;
 582         }
 583
 584         sm->eap_type_supp = type = data[0];
 585
 586         hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
 587                        HOSTAPD_LEVEL_DEBUG, "received EAP packet (code=%d "
 588                        "id=%d len=%d) from STA: EAP Response-%s (%d)",
 589                        eap->code, eap->identifier, be_to_host16(eap->length),
 590                        eap_server_get_name(0, type), type);
 591
 592         sm->dot1xAuthEapolRespFramesRx++;
 593
 594         wpabuf_free(sm->eap_if->eapRespData);
 595         sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len);
 596         sm->eapolEap = TRUE;
 597 }
 598
 599
 600 /* Process incoming EAP packet from Supplicant */
 601 static void handle_eap(struct hostapd_data *hapd, struct sta_info *sta,
 602                        u8 *buf, size_t len)
 603 {
 604         struct eap_hdr *eap;
 605         u16 eap_len;
 606
 607         if (len < sizeof(*eap)) {
 608                 printf("   too short EAP packet\n");
 609                 return;
 610         }
 611
 612         eap = (struct eap_hdr *) buf;
 613
 614         eap_len = be_to_host16(eap->length);
 615         wpa_printf(MSG_DEBUG, "EAP: code=%d identifier=%d length=%d",
 616                    eap->code, eap->identifier, eap_len);
 617         if (eap_len < sizeof(*eap)) {
 618                 wpa_printf(MSG_DEBUG, "   Invalid EAP length");
 619                 return;
 620         } else if (eap_len > len) {
 621                 wpa_printf(MSG_DEBUG, "   Too short frame to contain this EAP "
 622                            "packet");
 623                 return;
 624         } else if (eap_len < len) {
 625                 wpa_printf(MSG_DEBUG, "   Ignoring %lu extra bytes after EAP "
 626                            "packet", (unsigned long) len - eap_len);
 627         }
 628
 629         switch (eap->code) {
 630         case EAP_CODE_REQUEST:
 631                 wpa_printf(MSG_DEBUG, " (request)");
 632                 return;
 633         case EAP_CODE_RESPONSE:
 634                 wpa_printf(MSG_DEBUG, " (response)");
 635                 handle_eap_response(hapd, sta, eap, eap_len);
 636                 break;
 637         case EAP_CODE_SUCCESS:
 638                 wpa_printf(MSG_DEBUG, " (success)");
 639                 return;
 640         case EAP_CODE_FAILURE:
 641                 wpa_printf(MSG_DEBUG, " (failure)");
 642                 return;
 643         default:
 644                 wpa_printf(MSG_DEBUG, " (unknown code)");
 645                 return;
 646         }
 647 }
 648
 649
 650 static struct eapol_state_machine *
 651 ieee802_1x_alloc_eapol_sm(struct hostapd_data *hapd, struct sta_info *sta)
 652 {
 653         int flags = 0;
 654         if (sta->flags & WLAN_STA_PREAUTH)
 655                 flags |= EAPOL_SM_PREAUTH;
 656         if (sta->wpa_sm) {
 657                 flags |= EAPOL_SM_USES_WPA;
 658                 if (wpa_auth_sta_get_pmksa(sta->wpa_sm))
 659                         flags |= EAPOL_SM_FROM_PMKSA_CACHE;
 660         }
 661         return eapol_auth_alloc(hapd->eapol_auth, sta->addr, flags,
 662                                 sta->wps_ie, sta->p2p_ie, sta);
 663 }
 664
 665
 666 /**
 667  * ieee802_1x_receive - Process the EAPOL frames from the Supplicant
 668  * @hapd: hostapd BSS data
 669  * @sa: Source address (sender of the EAPOL frame)
 670  * @buf: EAPOL frame
 671  * @len: Length of buf in octets
 672  *
 673  * This function is called for each incoming EAPOL frame from the interface
 674  */
 675 void ieee802_1x_receive(struct hostapd_data *hapd, const u8 *sa, const u8 *buf,
 676                         size_t len)
 677 {
 678         struct sta_info *sta;
 679         struct ieee802_1x_hdr *hdr;
 680         struct ieee802_1x_eapol_key *key;
 681         u16 datalen;
 682         struct rsn_pmksa_cache_entry *pmksa;
 683         int key_mgmt;
 684
 685         if (!hapd->conf->ieee802_1x && !hapd->conf->wpa &&
 686             !hapd->conf->wps_state)
 687                 return;
 688
 689         wpa_printf(MSG_DEBUG, "IEEE 802.1X: %lu bytes from " MACSTR,
 690                    (unsigned long) len, MAC2STR(sa));
 691         sta = ap_get_sta(hapd, sa);
 692         if (!sta || !(sta->flags & (WLAN_STA_ASSOC | WLAN_STA_PREAUTH))) {
 693                 wpa_printf(MSG_DEBUG, "IEEE 802.1X data frame from not "
 694                            "associated/Pre-authenticating STA");
 695                 return;
 696         }
 697
 698         if (len < sizeof(*hdr)) {
 699                 printf("   too short IEEE 802.1X packet\n");
 700                 return;
 701         }
 702
 703         hdr = (struct ieee802_1x_hdr *) buf;
 704         datalen = be_to_host16(hdr->length);
 705         wpa_printf(MSG_DEBUG, "   IEEE 802.1X: version=%d type=%d length=%d",
 706                    hdr->version, hdr->type, datalen);
 707
 708         if (len - sizeof(*hdr) < datalen) {
 709                 printf("   frame too short for this IEEE 802.1X packet\n");
 710                 if (sta->eapol_sm)
 711                         sta->eapol_sm->dot1xAuthEapLengthErrorFramesRx++;
 712                 return;
 713         }
 714         if (len - sizeof(*hdr) > datalen) {
 715                 wpa_printf(MSG_DEBUG, "   ignoring %lu extra octets after "
 716                            "IEEE 802.1X packet",
 717                            (unsigned long) len - sizeof(*hdr) - datalen);
 718         }
 719
 720         if (sta->eapol_sm) {
 721                 sta->eapol_sm->dot1xAuthLastEapolFrameVersion = hdr->version;
 722                 sta->eapol_sm->dot1xAuthEapolFramesRx++;
 723         }
 724
 725         key = (struct ieee802_1x_eapol_key *) (hdr + 1);
 726         if (datalen >= sizeof(struct ieee802_1x_eapol_key) &&
 727             hdr->type == IEEE802_1X_TYPE_EAPOL_KEY &&
 728             (key->type == EAPOL_KEY_TYPE_WPA ||
 729              key->type == EAPOL_KEY_TYPE_RSN)) {
 730                 wpa_receive(hapd->wpa_auth, sta->wpa_sm, (u8 *) hdr,
 731                             sizeof(*hdr) + datalen);
 732                 return;
 733         }
 734
 735         if (!hapd->conf->ieee802_1x &&
 736             !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) {
 737                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore EAPOL message - "
 738                            "802.1X not enabled and WPS not used");
 739                 return;
 740         }
 741
 742         key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm);
 743         if (key_mgmt != -1 && wpa_key_mgmt_wpa_psk(key_mgmt)) {
 744                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore EAPOL message - "
 745                            "STA is using PSK");
 746                 return;
 747         }
 748
 749         if (!sta->eapol_sm) {
 750                 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
 751                 if (!sta->eapol_sm)
 752                         return;
 753
 754 #ifdef CONFIG_WPS
 755                 if (!hapd->conf->ieee802_1x &&
 756                     ((sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) ==
 757                      WLAN_STA_MAYBE_WPS)) {
 758                         /*
 759                          * Delay EAPOL frame transmission until a possible WPS
 760                          * STA initiates the handshake with EAPOL-Start.
 761                          */
 762                         sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
 763                 }
 764 #endif /* CONFIG_WPS */
 765
 766                 sta->eapol_sm->eap_if->portEnabled = TRUE;
 767         }
 768
 769         /* since we support version 1, we can ignore version field and proceed
 770          * as specified in version 1 standard [IEEE Std 802.1X-2001, 7.5.5] */
 771         /* TODO: actually, we are not version 1 anymore.. However, Version 2
 772          * does not change frame contents, so should be ok to process frames
 773          * more or less identically. Some changes might be needed for
 774          * verification of fields. */
 775
 776         switch (hdr->type) {
 777         case IEEE802_1X_TYPE_EAP_PACKET:
 778                 handle_eap(hapd, sta, (u8 *) (hdr + 1), datalen);
 779                 break;
 780
 781         case IEEE802_1X_TYPE_EAPOL_START:
 782                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 783                                HOSTAPD_LEVEL_DEBUG, "received EAPOL-Start "
 784                                "from STA");
 785                 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
 786                 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
 787                 if (pmksa) {
 788                         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
 789                                        HOSTAPD_LEVEL_DEBUG, "cached PMKSA "
 790                                        "available - ignore it since "
 791                                        "STA sent EAPOL-Start");
 792                         wpa_auth_sta_clear_pmksa(sta->wpa_sm, pmksa);
 793                 }
 794                 sta->eapol_sm->eapolStart = TRUE;
 795                 sta->eapol_sm->dot1xAuthEapolStartFramesRx++;
 796                 eap_server_clear_identity(sta->eapol_sm->eap);
 797                 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
 798                 break;
 799
 800         case IEEE802_1X_TYPE_EAPOL_LOGOFF:
 801                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 802                                HOSTAPD_LEVEL_DEBUG, "received EAPOL-Logoff "
 803                                "from STA");
 804                 sta->acct_terminate_cause =
 805                         RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
 806                 accounting_sta_stop(hapd, sta);
 807                 sta->eapol_sm->eapolLogoff = TRUE;
 808                 sta->eapol_sm->dot1xAuthEapolLogoffFramesRx++;
 809                 eap_server_clear_identity(sta->eapol_sm->eap);
 810                 break;
 811
 812         case IEEE802_1X_TYPE_EAPOL_KEY:
 813                 wpa_printf(MSG_DEBUG, "   EAPOL-Key");
 814                 if (!ap_sta_is_authorized(sta)) {
 815                         wpa_printf(MSG_DEBUG, "   Dropped key data from "
 816                                    "unauthorized Supplicant");
 817                         break;
 818                 }
 819                 break;
 820
 821         case IEEE802_1X_TYPE_EAPOL_ENCAPSULATED_ASF_ALERT:
 822                 wpa_printf(MSG_DEBUG, "   EAPOL-Encapsulated-ASF-Alert");
 823                 /* TODO: implement support for this; show data */
 824                 break;
 825
 826         default:
 827                 wpa_printf(MSG_DEBUG, "   unknown IEEE 802.1X packet type");
 828                 sta->eapol_sm->dot1xAuthInvalidEapolFramesRx++;
 829                 break;
 830         }
 831
 832         eapol_auth_step(sta->eapol_sm);
 833 }
 834
 835
 836 /**
 837  * ieee802_1x_new_station - Start IEEE 802.1X authentication
 838  * @hapd: hostapd BSS data
 839  * @sta: The station
 840  *
 841  * This function is called to start IEEE 802.1X authentication when a new
 842  * station completes IEEE 802.11 association.
 843  */
 844 void ieee802_1x_new_station(struct hostapd_data *hapd, struct sta_info *sta)
 845 {
 846         struct rsn_pmksa_cache_entry *pmksa;
 847         int reassoc = 1;
 848         int force_1x = 0;
 849         int key_mgmt;
 850
 851 #ifdef CONFIG_WPS
 852         if (hapd->conf->wps_state && hapd->conf->wpa &&
 853             (sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) {
 854                 /*
 855                  * Need to enable IEEE 802.1X/EAPOL state machines for possible
 856                  * WPS handshake even if IEEE 802.1X/EAPOL is not used for
 857                  * authentication in this BSS.
 858                  */
 859                 force_1x = 1;
 860         }
 861 #endif /* CONFIG_WPS */
 862
 863         if (!force_1x && !hapd->conf->ieee802_1x) {
 864                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - "
 865                            "802.1X not enabled or forced for WPS");
 866                 return;
 867         }
 868
 869         key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm);
 870         if (key_mgmt != -1 && wpa_key_mgmt_wpa_psk(key_mgmt)) {
 871                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - using PSK");
 872                 return;
 873         }
 874
 875         if (sta->eapol_sm == NULL) {
 876                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 877                                HOSTAPD_LEVEL_DEBUG, "start authentication");
 878                 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
 879                 if (sta->eapol_sm == NULL) {
 880                         hostapd_logger(hapd, sta->addr,
 881                                        HOSTAPD_MODULE_IEEE8021X,
 882                                        HOSTAPD_LEVEL_INFO,
 883                                        "failed to allocate state machine");
 884                         return;
 885                 }
 886                 reassoc = 0;
 887         }
 888
 889 #ifdef CONFIG_WPS
 890         sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
 891         if (!hapd->conf->ieee802_1x && !(sta->flags & WLAN_STA_WPS)) {
 892                 /*
 893                  * Delay EAPOL frame transmission until a possible WPS
 894                  * initiates the handshake with EAPOL-Start.
 895                  */
 896                 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
 897         }
 898 #endif /* CONFIG_WPS */
 899
 900         sta->eapol_sm->eap_if->portEnabled = TRUE;
 901
 902 #ifdef CONFIG_IEEE80211R
 903         if (sta->auth_alg == WLAN_AUTH_FT) {
 904                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 905                                HOSTAPD_LEVEL_DEBUG,
 906                                "PMK from FT - skip IEEE 802.1X/EAP");
 907                 /* Setup EAPOL state machines to already authenticated state
 908                  * because of existing FT information from R0KH. */
 909                 sta->eapol_sm->keyRun = TRUE;
 910                 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
 911                 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
 912                 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
 913                 sta->eapol_sm->authSuccess = TRUE;
 914                 if (sta->eapol_sm->eap)
 915                         eap_sm_notify_cached(sta->eapol_sm->eap);
 916                 /* TODO: get vlan_id from R0KH using RRB message */
 917                 return;
 918         }
 919 #endif /* CONFIG_IEEE80211R */
 920
 921         pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
 922         if (pmksa) {
 923                 int old_vlanid;
 924
 925                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 926                                HOSTAPD_LEVEL_DEBUG,
 927                                "PMK from PMKSA cache - skip IEEE 802.1X/EAP");
 928                 /* Setup EAPOL state machines to already authenticated state
 929                  * because of existing PMKSA information in the cache. */
 930                 sta->eapol_sm->keyRun = TRUE;
 931                 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
 932                 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
 933                 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
 934                 sta->eapol_sm->authSuccess = TRUE;
 935                 if (sta->eapol_sm->eap)
 936                         eap_sm_notify_cached(sta->eapol_sm->eap);
 937                 old_vlanid = sta->vlan_id;
 938                 pmksa_cache_to_eapol_data(pmksa, sta->eapol_sm);
 939                 if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
 940                         sta->vlan_id = 0;
 941                 ap_sta_bind_vlan(hapd, sta, old_vlanid);
 942         } else {
 943                 if (reassoc) {
 944                         /*
 945                          * Force EAPOL state machines to start
 946                          * re-authentication without having to wait for the
 947                          * Supplicant to send EAPOL-Start.
 948                          */
 949                         sta->eapol_sm->reAuthenticate = TRUE;
 950                 }
 951                 eapol_auth_step(sta->eapol_sm);
 952         }
 953 }
 954
 955
 956 void ieee802_1x_free_station(struct sta_info *sta)
 957 {
 958         struct eapol_state_machine *sm = sta->eapol_sm;
 959
 960         if (sm == NULL)
 961                 return;
 962
 963         sta->eapol_sm = NULL;
 964
 965 #ifndef CONFIG_NO_RADIUS
 966         radius_msg_free(sm->last_recv_radius);
 967         radius_free_class(&sm->radius_class);
 968 #endif /* CONFIG_NO_RADIUS */
 969
 970         os_free(sm->identity);
 971         eapol_auth_free(sm);
 972 }
 973
 974
 975 #ifndef CONFIG_NO_RADIUS
 976 static void ieee802_1x_decapsulate_radius(struct hostapd_data *hapd,
 977                                           struct sta_info *sta)
 978 {
 979         u8 *eap;
 980         size_t len;
 981         struct eap_hdr *hdr;
 982         int eap_type = -1;
 983         char buf[64];
 984         struct radius_msg *msg;
 985         struct eapol_state_machine *sm = sta->eapol_sm;
 986
 987         if (sm == NULL || sm->last_recv_radius == NULL) {
 988                 if (sm)
 989                         sm->eap_if->aaaEapNoReq = TRUE;
 990                 return;
 991         }
 992
 993         msg = sm->last_recv_radius;
 994
 995         eap = radius_msg_get_eap(msg, &len);
 996         if (eap == NULL) {
 997                 /* RFC 3579, Chap. 2.6.3:
 998                  * RADIUS server SHOULD NOT send Access-Reject/no EAP-Message
 999                  * attribute */
1000                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1001                                HOSTAPD_LEVEL_WARNING, "could not extract "
1002                                "EAP-Message from RADIUS message");
1003                 sm->eap_if->aaaEapNoReq = TRUE;
1004                 return;
1005         }
1006
1007         if (len < sizeof(*hdr)) {
1008                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1009                                HOSTAPD_LEVEL_WARNING, "too short EAP packet "
1010                                "received from authentication server");
1011                 os_free(eap);
1012                 sm->eap_if->aaaEapNoReq = TRUE;
1013                 return;
1014         }
1015
1016         if (len > sizeof(*hdr))
1017                 eap_type = eap[sizeof(*hdr)];
1018
1019         hdr = (struct eap_hdr *) eap;
1020         switch (hdr->code) {
1021         case EAP_CODE_REQUEST:
1022                 if (eap_type >= 0)
1023                         sm->eap_type_authsrv = eap_type;
1024                 os_snprintf(buf, sizeof(buf), "EAP-Request-%s (%d)",
1025                             eap_type >= 0 ? eap_server_get_name(0, eap_type) :
1026                             "??",
1027                             eap_type);
1028                 break;
1029         case EAP_CODE_RESPONSE:
1030                 os_snprintf(buf, sizeof(buf), "EAP Response-%s (%d)",
1031                             eap_type >= 0 ? eap_server_get_name(0, eap_type) :
1032                             "??",
1033                             eap_type);
1034                 break;
1035         case EAP_CODE_SUCCESS:
1036                 os_strlcpy(buf, "EAP Success", sizeof(buf));
1037                 break;
1038         case EAP_CODE_FAILURE:
1039                 os_strlcpy(buf, "EAP Failure", sizeof(buf));
1040                 break;
1041         default:
1042                 os_strlcpy(buf, "unknown EAP code", sizeof(buf));
1043                 break;
1044         }
1045         buf[sizeof(buf) - 1] = '\0';
1046         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1047                        HOSTAPD_LEVEL_DEBUG, "decapsulated EAP packet (code=%d "
1048                        "id=%d len=%d) from RADIUS server: %s",
1049                        hdr->code, hdr->identifier, be_to_host16(hdr->length),
1050                        buf);
1051         sm->eap_if->aaaEapReq = TRUE;
1052
1053         wpabuf_free(sm->eap_if->aaaEapReqData);
1054         sm->eap_if->aaaEapReqData = wpabuf_alloc_ext_data(eap, len);
1055 }
1056
1057
1058 static void ieee802_1x_get_keys(struct hostapd_data *hapd,
1059                                 struct sta_info *sta, struct radius_msg *msg,
1060                                 struct radius_msg *req,
1061                                 const u8 *shared_secret,
1062                                 size_t shared_secret_len)
1063 {
1064         struct radius_ms_mppe_keys *keys;
1065         struct eapol_state_machine *sm = sta->eapol_sm;
1066         if (sm == NULL)
1067                 return;
1068
1069         keys = radius_msg_get_ms_keys(msg, req, shared_secret,
1070                                       shared_secret_len);
1071
1072         if (keys && keys->send && keys->recv) {
1073                 size_t len = keys->send_len + keys->recv_len;
1074                 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Send-Key",
1075                                 keys->send, keys->send_len);
1076                 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Recv-Key",
1077                                 keys->recv, keys->recv_len);
1078
1079                 os_free(sm->eap_if->aaaEapKeyData);
1080                 sm->eap_if->aaaEapKeyData = os_malloc(len);
1081                 if (sm->eap_if->aaaEapKeyData) {
1082                         os_memcpy(sm->eap_if->aaaEapKeyData, keys->recv,
1083                                   keys->recv_len);
1084                         os_memcpy(sm->eap_if->aaaEapKeyData + keys->recv_len,
1085                                   keys->send, keys->send_len);
1086                         sm->eap_if->aaaEapKeyDataLen = len;
1087                         sm->eap_if->aaaEapKeyAvailable = TRUE;
1088                 }
1089         }
1090
1091         if (keys) {
1092                 os_free(keys->send);
1093                 os_free(keys->recv);
1094                 os_free(keys);
1095         }
1096 }
1097
1098
1099 static void ieee802_1x_store_radius_class(struct hostapd_data *hapd,
1100                                           struct sta_info *sta,
1101                                           struct radius_msg *msg)
1102 {
1103         u8 *class;
1104         size_t class_len;
1105         struct eapol_state_machine *sm = sta->eapol_sm;
1106         int count, i;
1107         struct radius_attr_data *nclass;
1108         size_t nclass_count;
1109
1110         if (!hapd->conf->radius->acct_server || hapd->radius == NULL ||
1111             sm == NULL)
1112                 return;
1113
1114         radius_free_class(&sm->radius_class);
1115         count = radius_msg_count_attr(msg, RADIUS_ATTR_CLASS, 1);
1116         if (count <= 0)
1117                 return;
1118
1119         nclass = os_zalloc(count * sizeof(struct radius_attr_data));
1120         if (nclass == NULL)
1121                 return;
1122
1123         nclass_count = 0;
1124
1125         class = NULL;
1126         for (i = 0; i < count; i++) {
1127                 do {
1128                         if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CLASS,
1129                                                     &class, &class_len,
1130                                                     class) < 0) {
1131                                 i = count;
1132                                 break;
1133                         }
1134                 } while (class_len < 1);
1135
1136                 nclass[nclass_count].data = os_malloc(class_len);
1137                 if (nclass[nclass_count].data == NULL)
1138                         break;
1139
1140                 os_memcpy(nclass[nclass_count].data, class, class_len);
1141                 nclass[nclass_count].len = class_len;
1142                 nclass_count++;
1143         }
1144
1145         sm->radius_class.attr = nclass;
1146         sm->radius_class.count = nclass_count;
1147         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Stored %lu RADIUS Class "
1148                    "attributes for " MACSTR,
1149                    (unsigned long) sm->radius_class.count,
1150                    MAC2STR(sta->addr));
1151 }
1152
1153
1154 /* Update sta->identity based on User-Name attribute in Access-Accept */
1155 static void ieee802_1x_update_sta_identity(struct hostapd_data *hapd,
1156                                            struct sta_info *sta,
1157                                            struct radius_msg *msg)
1158 {
1159         u8 *buf, *identity;
1160         size_t len;
1161         struct eapol_state_machine *sm = sta->eapol_sm;
1162
1163         if (sm == NULL)
1164                 return;
1165
1166         if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_USER_NAME, &buf, &len,
1167                                     NULL) < 0)
1168                 return;
1169
1170         identity = os_malloc(len + 1);
1171         if (identity == NULL)
1172                 return;
1173
1174         os_memcpy(identity, buf, len);
1175         identity[len] = '\0';
1176
1177         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1178                        HOSTAPD_LEVEL_DEBUG, "old identity '%s' updated with "
1179                        "User-Name from Access-Accept '%s'",
1180                        sm->identity ? (char *) sm->identity : "N/A",
1181                        (char *) identity);
1182
1183         os_free(sm->identity);
1184         sm->identity = identity;
1185         sm->identity_len = len;
1186 }
1187
1188
1189 struct sta_id_search {
1190         u8 identifier;
1191         struct eapol_state_machine *sm;
1192 };
1193
1194
1195 static int ieee802_1x_select_radius_identifier(struct hostapd_data *hapd,
1196                                                struct sta_info *sta,
1197                                                void *ctx)
1198 {
1199         struct sta_id_search *id_search = ctx;
1200         struct eapol_state_machine *sm = sta->eapol_sm;
1201
1202         if (sm && sm->radius_identifier >= 0 &&
1203             sm->radius_identifier == id_search->identifier) {
1204                 id_search->sm = sm;
1205                 return 1;
1206         }
1207         return 0;
1208 }
1209
1210
1211 static struct eapol_state_machine *
1212 ieee802_1x_search_radius_identifier(struct hostapd_data *hapd, u8 identifier)
1213 {
1214         struct sta_id_search id_search;
1215         id_search.identifier = identifier;
1216         id_search.sm = NULL;
1217         ap_for_each_sta(hapd, ieee802_1x_select_radius_identifier, &id_search);
1218         return id_search.sm;
1219 }
1220
1221
1222 /**
1223  * ieee802_1x_receive_auth - Process RADIUS frames from Authentication Server
1224  * @msg: RADIUS response message
1225  * @req: RADIUS request message
1226  * @shared_secret: RADIUS shared secret
1227  * @shared_secret_len: Length of shared_secret in octets
1228  * @data: Context data (struct hostapd_data *)
1229  * Returns: Processing status
1230  */
1231 static RadiusRxResult
1232 ieee802_1x_receive_auth(struct radius_msg *msg, struct radius_msg *req,
1233                         const u8 *shared_secret, size_t shared_secret_len,
1234                         void *data)
1235 {
1236         struct hostapd_data *hapd = data;
1237         struct sta_info *sta;
1238         u32 session_timeout = 0, termination_action, acct_interim_interval;
1239         int session_timeout_set, old_vlanid = 0;
1240         struct eapol_state_machine *sm;
1241         int override_eapReq = 0;
1242         struct radius_hdr *hdr = radius_msg_get_hdr(msg);
1243
1244         sm = ieee802_1x_search_radius_identifier(hapd, hdr->identifier);
1245         if (sm == NULL) {
1246                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Could not find matching "
1247                            "station for this RADIUS message");
1248                 return RADIUS_RX_UNKNOWN;
1249         }
1250         sta = sm->sta;
1251
1252         /* RFC 2869, Ch. 5.13: valid Message-Authenticator attribute MUST be
1253          * present when packet contains an EAP-Message attribute */
1254         if (hdr->code == RADIUS_CODE_ACCESS_REJECT &&
1255             radius_msg_get_attr(msg, RADIUS_ATTR_MESSAGE_AUTHENTICATOR, NULL,
1256                                 0) < 0 &&
1257             radius_msg_get_attr(msg, RADIUS_ATTR_EAP_MESSAGE, NULL, 0) < 0) {
1258                 wpa_printf(MSG_DEBUG, "Allowing RADIUS Access-Reject without "
1259                            "Message-Authenticator since it does not include "
1260                            "EAP-Message");
1261         } else if (radius_msg_verify(msg, shared_secret, shared_secret_len,
1262                                      req, 1)) {
1263                 printf("Incoming RADIUS packet did not have correct "
1264                        "Message-Authenticator - dropped\n");
1265                 return RADIUS_RX_INVALID_AUTHENTICATOR;
1266         }
1267
1268         if (hdr->code != RADIUS_CODE_ACCESS_ACCEPT &&
1269             hdr->code != RADIUS_CODE_ACCESS_REJECT &&
1270             hdr->code != RADIUS_CODE_ACCESS_CHALLENGE) {
1271                 printf("Unknown RADIUS message code\n");
1272                 return RADIUS_RX_UNKNOWN;
1273         }
1274
1275         sm->radius_identifier = -1;
1276         wpa_printf(MSG_DEBUG, "RADIUS packet matching with station " MACSTR,
1277                    MAC2STR(sta->addr));
1278
1279         radius_msg_free(sm->last_recv_radius);
1280         sm->last_recv_radius = msg;
1281
1282         session_timeout_set =
1283                 !radius_msg_get_attr_int32(msg, RADIUS_ATTR_SESSION_TIMEOUT,
1284                                            &session_timeout);
1285         if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_TERMINATION_ACTION,
1286                                       &termination_action))
1287                 termination_action = RADIUS_TERMINATION_ACTION_DEFAULT;
1288
1289         if (hapd->conf->acct_interim_interval == 0 &&
1290             hdr->code == RADIUS_CODE_ACCESS_ACCEPT &&
1291             radius_msg_get_attr_int32(msg, RADIUS_ATTR_ACCT_INTERIM_INTERVAL,
1292                                       &acct_interim_interval) == 0) {
1293                 if (acct_interim_interval < 60) {
1294                         hostapd_logger(hapd, sta->addr,
1295                                        HOSTAPD_MODULE_IEEE8021X,
1296                                        HOSTAPD_LEVEL_INFO,
1297                                        "ignored too small "
1298                                        "Acct-Interim-Interval %d",
1299                                        acct_interim_interval);
1300                 } else
1301                         sta->acct_interim_interval = acct_interim_interval;
1302         }
1303
1304
1305         switch (hdr->code) {
1306         case RADIUS_CODE_ACCESS_ACCEPT:
1307                 if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
1308                         sta->vlan_id = 0;
1309 #ifndef CONFIG_NO_VLAN
1310                 else {
1311                         old_vlanid = sta->vlan_id;
1312                         sta->vlan_id = radius_msg_get_vlanid(msg);
1313                 }
1314                 if (sta->vlan_id > 0 &&
1315                     hostapd_get_vlan_id_ifname(hapd->conf->vlan,
1316                                                sta->vlan_id)) {
1317                         hostapd_logger(hapd, sta->addr,
1318                                        HOSTAPD_MODULE_RADIUS,
1319                                        HOSTAPD_LEVEL_INFO,
1320                                        "VLAN ID %d", sta->vlan_id);
1321                 } else if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_REQUIRED) {
1322                         sta->eapol_sm->authFail = TRUE;
1323                         hostapd_logger(hapd, sta->addr,
1324                                        HOSTAPD_MODULE_IEEE8021X,
1325                                        HOSTAPD_LEVEL_INFO, "authentication "
1326                                        "server did not include required VLAN "
1327                                        "ID in Access-Accept");
1328                         break;
1329                 }
1330 #endif /* CONFIG_NO_VLAN */
1331
1332                 if (ap_sta_bind_vlan(hapd, sta, old_vlanid) < 0)
1333                         break;
1334
1335                 /* RFC 3580, Ch. 3.17 */
1336                 if (session_timeout_set && termination_action ==
1337                     RADIUS_TERMINATION_ACTION_RADIUS_REQUEST) {
1338                         sm->reAuthPeriod = session_timeout;
1339                 } else if (session_timeout_set)
1340                         ap_sta_session_timeout(hapd, sta, session_timeout);
1341
1342                 sm->eap_if->aaaSuccess = TRUE;
1343                 override_eapReq = 1;
1344                 ieee802_1x_get_keys(hapd, sta, msg, req, shared_secret,
1345                                     shared_secret_len);
1346                 ieee802_1x_store_radius_class(hapd, sta, msg);
1347                 ieee802_1x_update_sta_identity(hapd, sta, msg);
1348                 if (sm->eap_if->eapKeyAvailable &&
1349                     wpa_auth_pmksa_add(sta->wpa_sm, sm->eapol_key_crypt,
1350                                        session_timeout_set ?
1351                                        (int) session_timeout : -1, sm) == 0) {
1352                         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
1353                                        HOSTAPD_LEVEL_DEBUG,
1354                                        "Added PMKSA cache entry");
1355                 }
1356                 break;
1357         case RADIUS_CODE_ACCESS_REJECT:
1358                 sm->eap_if->aaaFail = TRUE;
1359                 override_eapReq = 1;
1360                 break;
1361         case RADIUS_CODE_ACCESS_CHALLENGE:
1362                 sm->eap_if->aaaEapReq = TRUE;
1363                 if (session_timeout_set) {
1364                         /* RFC 2869, Ch. 2.3.2; RFC 3580, Ch. 3.17 */
1365                         sm->eap_if->aaaMethodTimeout = session_timeout;
1366                         hostapd_logger(hapd, sm->addr,
1367                                        HOSTAPD_MODULE_IEEE8021X,
1368                                        HOSTAPD_LEVEL_DEBUG,
1369                                        "using EAP timeout of %d seconds (from "
1370                                        "RADIUS)",
1371                                        sm->eap_if->aaaMethodTimeout);
1372                 } else {
1373                         /*
1374                          * Use dynamic retransmission behavior per EAP
1375                          * specification.
1376                          */
1377                         sm->eap_if->aaaMethodTimeout = 0;
1378                 }
1379                 break;
1380         }
1381
1382         ieee802_1x_decapsulate_radius(hapd, sta);
1383         if (override_eapReq)
1384                 sm->eap_if->aaaEapReq = FALSE;
1385
1386         eapol_auth_step(sm);
1387
1388         return RADIUS_RX_QUEUED;
1389 }
1390 #endif /* CONFIG_NO_RADIUS */
1391
1392
1393 void ieee802_1x_abort_auth(struct hostapd_data *hapd, struct sta_info *sta)
1394 {
1395         struct eapol_state_machine *sm = sta->eapol_sm;
1396         if (sm == NULL)
1397                 return;
1398
1399         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1400                        HOSTAPD_LEVEL_DEBUG, "aborting authentication");
1401
1402 #ifndef CONFIG_NO_RADIUS
1403         radius_msg_free(sm->last_recv_radius);
1404         sm->last_recv_radius = NULL;
1405 #endif /* CONFIG_NO_RADIUS */
1406
1407         if (sm->eap_if->eapTimeout) {
1408                 /*
1409                  * Disconnect the STA since it did not reply to the last EAP
1410                  * request and we cannot continue EAP processing (EAP-Failure
1411                  * could only be sent if the EAP peer actually replied).
1412                  */
1413                 sm->eap_if->portEnabled = FALSE;
1414                 ap_sta_disconnect(hapd, sta, sta->addr,
1415                                   WLAN_REASON_PREV_AUTH_NOT_VALID);
1416         }
1417 }
1418
1419
1420 static int ieee802_1x_rekey_broadcast(struct hostapd_data *hapd)
1421 {
1422         struct eapol_authenticator *eapol = hapd->eapol_auth;
1423
1424         if (hapd->conf->default_wep_key_len < 1)
1425                 return 0;
1426
1427         os_free(eapol->default_wep_key);
1428         eapol->default_wep_key = os_malloc(hapd->conf->default_wep_key_len);
1429         if (eapol->default_wep_key == NULL ||
1430             random_get_bytes(eapol->default_wep_key,
1431                              hapd->conf->default_wep_key_len)) {
1432                 printf("Could not generate random WEP key.\n");
1433                 os_free(eapol->default_wep_key);
1434                 eapol->default_wep_key = NULL;
1435                 return -1;
1436         }
1437
1438         wpa_hexdump_key(MSG_DEBUG, "IEEE 802.1X: New default WEP key",
1439                         eapol->default_wep_key,
1440                         hapd->conf->default_wep_key_len);
1441
1442         return 0;
1443 }
1444
1445
1446 static int ieee802_1x_sta_key_available(struct hostapd_data *hapd,
1447                                         struct sta_info *sta, void *ctx)
1448 {
1449         if (sta->eapol_sm) {
1450                 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
1451                 eapol_auth_step(sta->eapol_sm);
1452         }
1453         return 0;
1454 }
1455
1456
1457 static void ieee802_1x_rekey(void *eloop_ctx, void *timeout_ctx)
1458 {
1459         struct hostapd_data *hapd = eloop_ctx;
1460         struct eapol_authenticator *eapol = hapd->eapol_auth;
1461
1462         if (eapol->default_wep_key_idx >= 3)
1463                 eapol->default_wep_key_idx =
1464                         hapd->conf->individual_wep_key_len > 0 ? 1 : 0;
1465         else
1466                 eapol->default_wep_key_idx++;
1467
1468         wpa_printf(MSG_DEBUG, "IEEE 802.1X: New default WEP key index %d",
1469                    eapol->default_wep_key_idx);
1470
1471         if (ieee802_1x_rekey_broadcast(hapd)) {
1472                 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1473                                HOSTAPD_LEVEL_WARNING, "failed to generate a "
1474                                "new broadcast key");
1475                 os_free(eapol->default_wep_key);
1476                 eapol->default_wep_key = NULL;
1477                 return;
1478         }
1479
1480         /* TODO: Could setup key for RX here, but change default TX keyid only
1481          * after new broadcast key has been sent to all stations. */
1482         if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
1483                                 broadcast_ether_addr,
1484                                 eapol->default_wep_key_idx, 1, NULL, 0,
1485                                 eapol->default_wep_key,
1486                                 hapd->conf->default_wep_key_len)) {
1487                 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1488                                HOSTAPD_LEVEL_WARNING, "failed to configure a "
1489                                "new broadcast key");
1490                 os_free(eapol->default_wep_key);
1491                 eapol->default_wep_key = NULL;
1492                 return;
1493         }
1494
1495         ap_for_each_sta(hapd, ieee802_1x_sta_key_available, NULL);
1496
1497         if (hapd->conf->wep_rekeying_period > 0) {
1498                 eloop_register_timeout(hapd->conf->wep_rekeying_period, 0,
1499                                        ieee802_1x_rekey, hapd, NULL);
1500         }
1501 }
1502
1503
1504 static void ieee802_1x_eapol_send(void *ctx, void *sta_ctx, u8 type,
1505                                   const u8 *data, size_t datalen)
1506 {
1507 #ifdef CONFIG_WPS
1508         struct sta_info *sta = sta_ctx;
1509
1510         if ((sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) ==
1511             WLAN_STA_MAYBE_WPS) {
1512                 const u8 *identity;
1513                 size_t identity_len;
1514                 struct eapol_state_machine *sm = sta->eapol_sm;
1515
1516                 identity = eap_get_identity(sm->eap, &identity_len);
1517                 if (identity &&
1518                     ((identity_len == WSC_ID_ENROLLEE_LEN &&
1519                       os_memcmp(identity, WSC_ID_ENROLLEE,
1520                                 WSC_ID_ENROLLEE_LEN) == 0) ||
1521                      (identity_len == WSC_ID_REGISTRAR_LEN &&
1522                       os_memcmp(identity, WSC_ID_REGISTRAR,
1523                                 WSC_ID_REGISTRAR_LEN) == 0))) {
1524                         wpa_printf(MSG_DEBUG, "WPS: WLAN_STA_MAYBE_WPS -> "
1525                                    "WLAN_STA_WPS");
1526                         sta->flags |= WLAN_STA_WPS;
1527                 }
1528         }
1529 #endif /* CONFIG_WPS */
1530
1531         ieee802_1x_send(ctx, sta_ctx, type, data, datalen);
1532 }
1533
1534
1535 static void ieee802_1x_aaa_send(void *ctx, void *sta_ctx,
1536                                 const u8 *data, size_t datalen)
1537 {
1538 #ifndef CONFIG_NO_RADIUS
1539         struct hostapd_data *hapd = ctx;
1540         struct sta_info *sta = sta_ctx;
1541
1542         ieee802_1x_encapsulate_radius(hapd, sta, data, datalen);
1543 #endif /* CONFIG_NO_RADIUS */
1544 }
1545
1546
1547 static void _ieee802_1x_finished(void *ctx, void *sta_ctx, int success,
1548                                  int preauth)
1549 {
1550         struct hostapd_data *hapd = ctx;
1551         struct sta_info *sta = sta_ctx;
1552         if (preauth)
1553                 rsn_preauth_finished(hapd, sta, success);
1554         else
1555                 ieee802_1x_finished(hapd, sta, success);
1556 }
1557
1558
1559 static int ieee802_1x_get_eap_user(void *ctx, const u8 *identity,
1560                                    size_t identity_len, int phase2,
1561                                    struct eap_user *user)
1562 {
1563         struct hostapd_data *hapd = ctx;
1564         const struct hostapd_eap_user *eap_user;
1565         int i, count;
1566
1567         eap_user = hostapd_get_eap_user(hapd->conf, identity,
1568                                         identity_len, phase2);
1569         if (eap_user == NULL)
1570                 return -1;
1571
1572         os_memset(user, 0, sizeof(*user));
1573         user->phase2 = phase2;
1574         count = EAP_USER_MAX_METHODS;
1575         if (count > EAP_MAX_METHODS)
1576                 count = EAP_MAX_METHODS;
1577         for (i = 0; i < count; i++) {
1578                 user->methods[i].vendor = eap_user->methods[i].vendor;
1579                 user->methods[i].method = eap_user->methods[i].method;
1580         }
1581
1582         if (eap_user->password) {
1583                 user->password = os_malloc(eap_user->password_len);
1584                 if (user->password == NULL)
1585                         return -1;
1586                 os_memcpy(user->password, eap_user->password,
1587                           eap_user->password_len);
1588                 user->password_len = eap_user->password_len;
1589         }
1590         user->force_version = eap_user->force_version;
1591         user->ttls_auth = eap_user->ttls_auth;
1592
1593         return 0;
1594 }
1595
1596
1597 static int ieee802_1x_sta_entry_alive(void *ctx, const u8 *addr)
1598 {
1599         struct hostapd_data *hapd = ctx;
1600         struct sta_info *sta;
1601         sta = ap_get_sta(hapd, addr);
1602         if (sta == NULL || sta->eapol_sm == NULL)
1603                 return 0;
1604         return 1;
1605 }
1606
1607
1608 static void ieee802_1x_logger(void *ctx, const u8 *addr,
1609                               eapol_logger_level level, const char *txt)
1610 {
1611 #ifndef CONFIG_NO_HOSTAPD_LOGGER
1612         struct hostapd_data *hapd = ctx;
1613         int hlevel;
1614
1615         switch (level) {
1616         case EAPOL_LOGGER_WARNING:
1617                 hlevel = HOSTAPD_LEVEL_WARNING;
1618                 break;
1619         case EAPOL_LOGGER_INFO:
1620                 hlevel = HOSTAPD_LEVEL_INFO;
1621                 break;
1622         case EAPOL_LOGGER_DEBUG:
1623         default:
1624                 hlevel = HOSTAPD_LEVEL_DEBUG;
1625                 break;
1626         }
1627
1628         hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE8021X, hlevel, "%s",
1629                        txt);
1630 #endif /* CONFIG_NO_HOSTAPD_LOGGER */
1631 }
1632
1633
1634 static void ieee802_1x_set_port_authorized(void *ctx, void *sta_ctx,
1635                                            int authorized)
1636 {
1637         struct hostapd_data *hapd = ctx;
1638         struct sta_info *sta = sta_ctx;
1639         ieee802_1x_set_sta_authorized(hapd, sta, authorized);
1640 }
1641
1642
1643 static void _ieee802_1x_abort_auth(void *ctx, void *sta_ctx)
1644 {
1645         struct hostapd_data *hapd = ctx;
1646         struct sta_info *sta = sta_ctx;
1647         ieee802_1x_abort_auth(hapd, sta);
1648 }
1649
1650
1651 static void _ieee802_1x_tx_key(void *ctx, void *sta_ctx)
1652 {
1653         struct hostapd_data *hapd = ctx;
1654         struct sta_info *sta = sta_ctx;
1655         ieee802_1x_tx_key(hapd, sta);
1656 }
1657
1658
1659 static void ieee802_1x_eapol_event(void *ctx, void *sta_ctx,
1660                                    enum eapol_event type)
1661 {
1662         /* struct hostapd_data *hapd = ctx; */
1663         struct sta_info *sta = sta_ctx;
1664         switch (type) {
1665         case EAPOL_AUTH_SM_CHANGE:
1666                 wpa_auth_sm_notify(sta->wpa_sm);
1667                 break;
1668         case EAPOL_AUTH_REAUTHENTICATE:
1669                 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
1670                 break;
1671         }
1672 }
1673
1674
1675 int ieee802_1x_init(struct hostapd_data *hapd)
1676 {
1677         int i;
1678         struct eapol_auth_config conf;
1679         struct eapol_auth_cb cb;
1680
1681         os_memset(&conf, 0, sizeof(conf));
1682         conf.ctx = hapd;
1683         conf.eap_reauth_period = hapd->conf->eap_reauth_period;
1684         conf.wpa = hapd->conf->wpa;
1685         conf.individual_wep_key_len = hapd->conf->individual_wep_key_len;
1686         conf.eap_server = hapd->conf->eap_server;
1687         conf.ssl_ctx = hapd->ssl_ctx;
1688         conf.msg_ctx = hapd->msg_ctx;
1689         conf.eap_sim_db_priv = hapd->eap_sim_db_priv;
1690         conf.eap_req_id_text = hapd->conf->eap_req_id_text;
1691         conf.eap_req_id_text_len = hapd->conf->eap_req_id_text_len;
1692         conf.pac_opaque_encr_key = hapd->conf->pac_opaque_encr_key;
1693         conf.eap_fast_a_id = hapd->conf->eap_fast_a_id;
1694         conf.eap_fast_a_id_len = hapd->conf->eap_fast_a_id_len;
1695         conf.eap_fast_a_id_info = hapd->conf->eap_fast_a_id_info;
1696         conf.eap_fast_prov = hapd->conf->eap_fast_prov;
1697         conf.pac_key_lifetime = hapd->conf->pac_key_lifetime;
1698         conf.pac_key_refresh_time = hapd->conf->pac_key_refresh_time;
1699         conf.eap_sim_aka_result_ind = hapd->conf->eap_sim_aka_result_ind;
1700         conf.tnc = hapd->conf->tnc;
1701         conf.wps = hapd->wps;
1702         conf.fragment_size = hapd->conf->fragment_size;
1703         conf.pwd_group = hapd->conf->pwd_group;
1704         conf.pbc_in_m1 = hapd->conf->pbc_in_m1;
1705
1706         os_memset(&cb, 0, sizeof(cb));
1707         cb.eapol_send = ieee802_1x_eapol_send;
1708         cb.aaa_send = ieee802_1x_aaa_send;
1709         cb.finished = _ieee802_1x_finished;
1710         cb.get_eap_user = ieee802_1x_get_eap_user;
1711         cb.sta_entry_alive = ieee802_1x_sta_entry_alive;
1712         cb.logger = ieee802_1x_logger;
1713         cb.set_port_authorized = ieee802_1x_set_port_authorized;
1714         cb.abort_auth = _ieee802_1x_abort_auth;
1715         cb.tx_key = _ieee802_1x_tx_key;
1716         cb.eapol_event = ieee802_1x_eapol_event;
1717
1718         hapd->eapol_auth = eapol_auth_init(&conf, &cb);
1719         if (hapd->eapol_auth == NULL)
1720                 return -1;
1721
1722         if ((hapd->conf->ieee802_1x || hapd->conf->wpa) &&
1723             hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 1))
1724                 return -1;
1725
1726 #ifndef CONFIG_NO_RADIUS
1727         if (radius_client_register(hapd->radius, RADIUS_AUTH,
1728                                    ieee802_1x_receive_auth, hapd))
1729                 return -1;
1730 #endif /* CONFIG_NO_RADIUS */
1731
1732         if (hapd->conf->default_wep_key_len) {
1733                 for (i = 0; i < 4; i++)
1734                         hostapd_drv_set_key(hapd->conf->iface, hapd,
1735                                             WPA_ALG_NONE, NULL, i, 0, NULL, 0,
1736                                             NULL, 0);
1737
1738                 ieee802_1x_rekey(hapd, NULL);
1739
1740                 if (hapd->eapol_auth->default_wep_key == NULL)
1741                         return -1;
1742         }
1743
1744         return 0;
1745 }
1746
1747
1748 void ieee802_1x_deinit(struct hostapd_data *hapd)
1749 {
1750         eloop_cancel_timeout(ieee802_1x_rekey, hapd, NULL);
1751
1752         if (hapd->driver != NULL &&
1753             (hapd->conf->ieee802_1x || hapd->conf->wpa))
1754                 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0);
1755
1756         eapol_auth_deinit(hapd->eapol_auth);
1757         hapd->eapol_auth = NULL;
1758 }
1759
1760
1761 int ieee802_1x_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
1762                          const u8 *buf, size_t len, int ack)
1763 {
1764         struct ieee80211_hdr *hdr;
1765         struct ieee802_1x_hdr *xhdr;
1766         struct ieee802_1x_eapol_key *key;
1767         u8 *pos;
1768         const unsigned char rfc1042_hdr[ETH_ALEN] =
1769                 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
1770
1771         if (sta == NULL)
1772                 return -1;
1773         if (len < sizeof(*hdr) + sizeof(rfc1042_hdr) + 2 + sizeof(*xhdr))
1774                 return 0;
1775
1776         hdr = (struct ieee80211_hdr *) buf;
1777         pos = (u8 *) (hdr + 1);
1778         if (os_memcmp(pos, rfc1042_hdr, sizeof(rfc1042_hdr)) != 0)
1779                 return 0;
1780         pos += sizeof(rfc1042_hdr);
1781         if (WPA_GET_BE16(pos) != ETH_P_PAE)
1782                 return 0;
1783         pos += 2;
1784
1785         xhdr = (struct ieee802_1x_hdr *) pos;
1786         pos += sizeof(*xhdr);
1787
1788         wpa_printf(MSG_DEBUG, "IEEE 802.1X: " MACSTR " TX status - version=%d "
1789                    "type=%d length=%d - ack=%d",
1790                    MAC2STR(sta->addr), xhdr->version, xhdr->type,
1791                    be_to_host16(xhdr->length), ack);
1792
1793         if (xhdr->type == IEEE802_1X_TYPE_EAPOL_KEY &&
1794             pos + sizeof(struct wpa_eapol_key) <= buf + len) {
1795                 const struct wpa_eapol_key *wpa;
1796                 wpa = (const struct wpa_eapol_key *) pos;
1797                 if (wpa->type == EAPOL_KEY_TYPE_RSN ||
1798                     wpa->type == EAPOL_KEY_TYPE_WPA)
1799                         wpa_auth_eapol_key_tx_status(hapd->wpa_auth,
1800                                                      sta->wpa_sm, ack);
1801         }
1802
1803         /* EAPOL EAP-Packet packets are eventually re-sent by either Supplicant
1804          * or Authenticator state machines, but EAPOL-Key packets are not
1805          * retransmitted in case of failure. Try to re-sent failed EAPOL-Key
1806          * packets couple of times because otherwise STA keys become
1807          * unsynchronized with AP. */
1808         if (xhdr->type == IEEE802_1X_TYPE_EAPOL_KEY && !ack &&
1809             pos + sizeof(*key) <= buf + len) {
1810                 key = (struct ieee802_1x_eapol_key *) pos;
1811                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1812                                HOSTAPD_LEVEL_DEBUG, "did not Ack EAPOL-Key "
1813                                "frame (%scast index=%d)",
1814                                key->key_index & BIT(7) ? "uni" : "broad",
1815                                key->key_index & ~BIT(7));
1816                 /* TODO: re-send EAPOL-Key couple of times (with short delay
1817                  * between them?). If all attempt fail, report error and
1818                  * deauthenticate STA so that it will get new keys when
1819                  * authenticating again (e.g., after returning in range).
1820                  * Separate limit/transmit state needed both for unicast and
1821                  * broadcast keys(?) */
1822         }
1823         /* TODO: could move unicast key configuration from ieee802_1x_tx_key()
1824          * to here and change the key only if the EAPOL-Key packet was Acked.
1825          */
1826
1827         return 1;
1828 }
1829
1830
1831 u8 * ieee802_1x_get_identity(struct eapol_state_machine *sm, size_t *len)
1832 {
1833         if (sm == NULL || sm->identity == NULL)
1834                 return NULL;
1835
1836         *len = sm->identity_len;
1837         return sm->identity;
1838 }
1839
1840
1841 u8 * ieee802_1x_get_radius_class(struct eapol_state_machine *sm, size_t *len,
1842                                  int idx)
1843 {
1844         if (sm == NULL || sm->radius_class.attr == NULL ||
1845             idx >= (int) sm->radius_class.count)
1846                 return NULL;
1847
1848         *len = sm->radius_class.attr[idx].len;
1849         return sm->radius_class.attr[idx].data;
1850 }
1851
1852
1853 const u8 * ieee802_1x_get_key(struct eapol_state_machine *sm, size_t *len)
1854 {
1855         *len = 0;
1856         if (sm == NULL)
1857                 return NULL;
1858
1859         *len = sm->eap_if->eapKeyDataLen;
1860         return sm->eap_if->eapKeyData;
1861 }
1862
1863
1864 void ieee802_1x_notify_port_enabled(struct eapol_state_machine *sm,
1865                                     int enabled)
1866 {
1867         if (sm == NULL)
1868                 return;
1869         sm->eap_if->portEnabled = enabled ? TRUE : FALSE;
1870         eapol_auth_step(sm);
1871 }
1872
1873
1874 void ieee802_1x_notify_port_valid(struct eapol_state_machine *sm,
1875                                   int valid)
1876 {
1877         if (sm == NULL)
1878                 return;
1879         sm->portValid = valid ? TRUE : FALSE;
1880         eapol_auth_step(sm);
1881 }
1882
1883
1884 void ieee802_1x_notify_pre_auth(struct eapol_state_machine *sm, int pre_auth)
1885 {
1886         if (sm == NULL)
1887                 return;
1888         if (pre_auth)
1889                 sm->flags |= EAPOL_SM_PREAUTH;
1890         else
1891                 sm->flags &= ~EAPOL_SM_PREAUTH;
1892 }
1893
1894
1895 static const char * bool_txt(Boolean bool)
1896 {
1897         return bool ? "TRUE" : "FALSE";
1898 }
1899
1900
1901 int ieee802_1x_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
1902 {
1903         /* TODO */
1904         return 0;
1905 }
1906
1907
1908 int ieee802_1x_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
1909                            char *buf, size_t buflen)
1910 {
1911         int len = 0, ret;
1912         struct eapol_state_machine *sm = sta->eapol_sm;
1913
1914         if (sm == NULL)
1915                 return 0;
1916
1917         ret = os_snprintf(buf + len, buflen - len,
1918                           "dot1xPaePortNumber=%d\n"
1919                           "dot1xPaePortProtocolVersion=%d\n"
1920                           "dot1xPaePortCapabilities=1\n"
1921                           "dot1xPaePortInitialize=%d\n"
1922                           "dot1xPaePortReauthenticate=FALSE\n",
1923                           sta->aid,
1924                           EAPOL_VERSION,
1925                           sm->initialize);
1926         if (ret < 0 || (size_t) ret >= buflen - len)
1927                 return len;
1928         len += ret;
1929
1930         /* dot1xAuthConfigTable */
1931         ret = os_snprintf(buf + len, buflen - len,
1932                           "dot1xAuthPaeState=%d\n"
1933                           "dot1xAuthBackendAuthState=%d\n"
1934                           "dot1xAuthAdminControlledDirections=%d\n"
1935                           "dot1xAuthOperControlledDirections=%d\n"
1936                           "dot1xAuthAuthControlledPortStatus=%d\n"
1937                           "dot1xAuthAuthControlledPortControl=%d\n"
1938                           "dot1xAuthQuietPeriod=%u\n"
1939                           "dot1xAuthServerTimeout=%u\n"
1940                           "dot1xAuthReAuthPeriod=%u\n"
1941                           "dot1xAuthReAuthEnabled=%s\n"
1942                           "dot1xAuthKeyTxEnabled=%s\n",
1943                           sm->auth_pae_state + 1,
1944                           sm->be_auth_state + 1,
1945                           sm->adminControlledDirections,
1946                           sm->operControlledDirections,
1947                           sm->authPortStatus,
1948                           sm->portControl,
1949                           sm->quietPeriod,
1950                           sm->serverTimeout,
1951                           sm->reAuthPeriod,
1952                           bool_txt(sm->reAuthEnabled),
1953                           bool_txt(sm->keyTxEnabled));
1954         if (ret < 0 || (size_t) ret >= buflen - len)
1955                 return len;
1956         len += ret;
1957
1958         /* dot1xAuthStatsTable */
1959         ret = os_snprintf(buf + len, buflen - len,
1960                           "dot1xAuthEapolFramesRx=%u\n"
1961                           "dot1xAuthEapolFramesTx=%u\n"
1962                           "dot1xAuthEapolStartFramesRx=%u\n"
1963                           "dot1xAuthEapolLogoffFramesRx=%u\n"
1964                           "dot1xAuthEapolRespIdFramesRx=%u\n"
1965                           "dot1xAuthEapolRespFramesRx=%u\n"
1966                           "dot1xAuthEapolReqIdFramesTx=%u\n"
1967                           "dot1xAuthEapolReqFramesTx=%u\n"
1968                           "dot1xAuthInvalidEapolFramesRx=%u\n"
1969                           "dot1xAuthEapLengthErrorFramesRx=%u\n"
1970                           "dot1xAuthLastEapolFrameVersion=%u\n"
1971                           "dot1xAuthLastEapolFrameSource=" MACSTR "\n",
1972                           sm->dot1xAuthEapolFramesRx,
1973                           sm->dot1xAuthEapolFramesTx,
1974                           sm->dot1xAuthEapolStartFramesRx,
1975                           sm->dot1xAuthEapolLogoffFramesRx,
1976                           sm->dot1xAuthEapolRespIdFramesRx,
1977                           sm->dot1xAuthEapolRespFramesRx,
1978                           sm->dot1xAuthEapolReqIdFramesTx,
1979                           sm->dot1xAuthEapolReqFramesTx,
1980                           sm->dot1xAuthInvalidEapolFramesRx,
1981                           sm->dot1xAuthEapLengthErrorFramesRx,
1982                           sm->dot1xAuthLastEapolFrameVersion,
1983                           MAC2STR(sm->addr));
1984         if (ret < 0 || (size_t) ret >= buflen - len)
1985                 return len;
1986         len += ret;
1987
1988         /* dot1xAuthDiagTable */
1989         ret = os_snprintf(buf + len, buflen - len,
1990                           "dot1xAuthEntersConnecting=%u\n"
1991                           "dot1xAuthEapLogoffsWhileConnecting=%u\n"
1992                           "dot1xAuthEntersAuthenticating=%u\n"
1993                           "dot1xAuthAuthSuccessesWhileAuthenticating=%u\n"
1994                           "dot1xAuthAuthTimeoutsWhileAuthenticating=%u\n"
1995                           "dot1xAuthAuthFailWhileAuthenticating=%u\n"
1996                           "dot1xAuthAuthEapStartsWhileAuthenticating=%u\n"
1997                           "dot1xAuthAuthEapLogoffWhileAuthenticating=%u\n"
1998                           "dot1xAuthAuthReauthsWhileAuthenticated=%u\n"
1999                           "dot1xAuthAuthEapStartsWhileAuthenticated=%u\n"
2000                           "dot1xAuthAuthEapLogoffWhileAuthenticated=%u\n"
2001                           "dot1xAuthBackendResponses=%u\n"
2002                           "dot1xAuthBackendAccessChallenges=%u\n"
2003                           "dot1xAuthBackendOtherRequestsToSupplicant=%u\n"
2004                           "dot1xAuthBackendAuthSuccesses=%u\n"
2005                           "dot1xAuthBackendAuthFails=%u\n",
2006                           sm->authEntersConnecting,
2007                           sm->authEapLogoffsWhileConnecting,
2008                           sm->authEntersAuthenticating,
2009                           sm->authAuthSuccessesWhileAuthenticating,
2010                           sm->authAuthTimeoutsWhileAuthenticating,
2011                           sm->authAuthFailWhileAuthenticating,
2012                           sm->authAuthEapStartsWhileAuthenticating,
2013                           sm->authAuthEapLogoffWhileAuthenticating,
2014                           sm->authAuthReauthsWhileAuthenticated,
2015                           sm->authAuthEapStartsWhileAuthenticated,
2016                           sm->authAuthEapLogoffWhileAuthenticated,
2017                           sm->backendResponses,
2018                           sm->backendAccessChallenges,
2019                           sm->backendOtherRequestsToSupplicant,
2020                           sm->backendAuthSuccesses,
2021                           sm->backendAuthFails);
2022         if (ret < 0 || (size_t) ret >= buflen - len)
2023                 return len;
2024         len += ret;
2025
2026         /* dot1xAuthSessionStatsTable */
2027         ret = os_snprintf(buf + len, buflen - len,
2028                           /* TODO: dot1xAuthSessionOctetsRx */
2029                           /* TODO: dot1xAuthSessionOctetsTx */
2030                           /* TODO: dot1xAuthSessionFramesRx */
2031                           /* TODO: dot1xAuthSessionFramesTx */
2032                           "dot1xAuthSessionId=%08X-%08X\n"
2033                           "dot1xAuthSessionAuthenticMethod=%d\n"
2034                           "dot1xAuthSessionTime=%u\n"
2035                           "dot1xAuthSessionTerminateCause=999\n"
2036                           "dot1xAuthSessionUserName=%s\n",
2037                           sta->acct_session_id_hi, sta->acct_session_id_lo,
2038                           (wpa_key_mgmt_wpa_ieee8021x(
2039                                    wpa_auth_sta_key_mgmt(sta->wpa_sm))) ?
2040                           1 : 2,
2041                           (unsigned int) (time(NULL) -
2042                                           sta->acct_session_start),
2043                           sm->identity);
2044         if (ret < 0 || (size_t) ret >= buflen - len)
2045                 return len;
2046         len += ret;
2047
2048         return len;
2049 }
2050
2051
2052 static void ieee802_1x_finished(struct hostapd_data *hapd,
2053                                 struct sta_info *sta, int success)
2054 {
2055         const u8 *key;
2056         size_t len;
2057         /* TODO: get PMKLifetime from WPA parameters */
2058         static const int dot11RSNAConfigPMKLifetime = 43200;
2059
2060         key = ieee802_1x_get_key(sta->eapol_sm, &len);
2061         if (success && key && len >= PMK_LEN &&
2062             wpa_auth_pmksa_add(sta->wpa_sm, key, dot11RSNAConfigPMKLifetime,
2063                                sta->eapol_sm) == 0) {
2064                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
2065                                HOSTAPD_LEVEL_DEBUG,
2066                                "Added PMKSA cache entry (IEEE 802.1X)");
2067         }
2068
2069 #ifdef CONFIG_WPS
2070         if (!success && (sta->flags & WLAN_STA_WPS)) {
2071                 /*
2072                  * Many devices require deauthentication after WPS provisioning
2073                  * and some may not be be able to do that themselves, so
2074                  * disconnect the client here.
2075                  */
2076                 wpa_printf(MSG_DEBUG, "WPS: Force disconnection after "
2077                            "EAP-Failure");
2078                 /* Add a small sleep to increase likelihood of previously
2079                  * requested EAP-Failure TX getting out before this should the
2080                  * driver reorder operations.
2081                  */
2082                 os_sleep(0, 10000);
2083                 ap_sta_disconnect(hapd, sta, sta->addr,
2084                                   WLAN_REASON_PREV_AUTH_NOT_VALID);
2085         }
2086 #endif /* CONFIG_WPS */
2087 }