contrib/hostapd/src/ap/ieee802_1x.c

   1 /*
   2  * hostapd / IEEE 802.1X-2004 Authenticator
   3  * Copyright (c) 2002-2012, Jouni Malinen <j@w1.fi>
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "utils/includes.h"
  10
  11 #include "utils/common.h"
  12 #include "utils/eloop.h"
  13 #include "crypto/md5.h"
  14 #include "crypto/crypto.h"
  15 #include "crypto/random.h"
  16 #include "common/ieee802_11_defs.h"
  17 #include "radius/radius.h"
  18 #include "radius/radius_client.h"
  19 #include "eap_server/eap.h"
  20 #include "eap_common/eap_wsc_common.h"
  21 #include "eapol_auth/eapol_auth_sm.h"
  22 #include "eapol_auth/eapol_auth_sm_i.h"
  23 #include "p2p/p2p.h"
  24 #include "hostapd.h"
  25 #include "accounting.h"
  26 #include "sta_info.h"
  27 #include "wpa_auth.h"
  28 #include "preauth_auth.h"
  29 #include "pmksa_cache_auth.h"
  30 #include "ap_config.h"
  31 #include "ap_drv_ops.h"
  32 #include "wps_hostapd.h"
  33 #include "ieee802_1x.h"
  34
  35
  36 static void ieee802_1x_finished(struct hostapd_data *hapd,
  37                                 struct sta_info *sta, int success);
  38
  39
  40 static void ieee802_1x_send(struct hostapd_data *hapd, struct sta_info *sta,
  41                             u8 type, const u8 *data, size_t datalen)
  42 {
  43         u8 *buf;
  44         struct ieee802_1x_hdr *xhdr;
  45         size_t len;
  46         int encrypt = 0;
  47
  48         len = sizeof(*xhdr) + datalen;
  49         buf = os_zalloc(len);
  50         if (buf == NULL) {
  51                 wpa_printf(MSG_ERROR, "malloc() failed for "
  52                            "ieee802_1x_send(len=%lu)",
  53                            (unsigned long) len);
  54                 return;
  55         }
  56
  57         xhdr = (struct ieee802_1x_hdr *) buf;
  58         xhdr->version = hapd->conf->eapol_version;
  59         xhdr->type = type;
  60         xhdr->length = host_to_be16(datalen);
  61
  62         if (datalen > 0 && data != NULL)
  63                 os_memcpy(xhdr + 1, data, datalen);
  64
  65         if (wpa_auth_pairwise_set(sta->wpa_sm))
  66                 encrypt = 1;
  67         if (sta->flags & WLAN_STA_PREAUTH) {
  68                 rsn_preauth_send(hapd, sta, buf, len);
  69         } else {
  70                 hostapd_drv_hapd_send_eapol(
  71                         hapd, sta->addr, buf, len,
  72                         encrypt, hostapd_sta_flags_to_drv(sta->flags));
  73         }
  74
  75         os_free(buf);
  76 }
  77
  78
  79 void ieee802_1x_set_sta_authorized(struct hostapd_data *hapd,
  80                                    struct sta_info *sta, int authorized)
  81 {
  82         int res;
  83
  84         if (sta->flags & WLAN_STA_PREAUTH)
  85                 return;
  86
  87         if (authorized) {
  88                 ap_sta_set_authorized(hapd, sta, 1);
  89                 res = hostapd_set_authorized(hapd, sta, 1);
  90                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
  91                                HOSTAPD_LEVEL_DEBUG, "authorizing port");
  92         } else {
  93                 ap_sta_set_authorized(hapd, sta, 0);
  94                 res = hostapd_set_authorized(hapd, sta, 0);
  95                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
  96                                HOSTAPD_LEVEL_DEBUG, "unauthorizing port");
  97         }
  98
  99         if (res && errno != ENOENT) {
 100                 wpa_printf(MSG_DEBUG, "Could not set station " MACSTR
 101                            " flags for kernel driver (errno=%d).",
 102                            MAC2STR(sta->addr), errno);
 103         }
 104
 105         if (authorized) {
 106                 os_get_reltime(&sta->connected_time);
 107                 accounting_sta_start(hapd, sta);
 108         }
 109 }
 110
 111
 112 static void ieee802_1x_tx_key_one(struct hostapd_data *hapd,
 113                                   struct sta_info *sta,
 114                                   int idx, int broadcast,
 115                                   u8 *key_data, size_t key_len)
 116 {
 117         u8 *buf, *ekey;
 118         struct ieee802_1x_hdr *hdr;
 119         struct ieee802_1x_eapol_key *key;
 120         size_t len, ekey_len;
 121         struct eapol_state_machine *sm = sta->eapol_sm;
 122
 123         if (sm == NULL)
 124                 return;
 125
 126         len = sizeof(*key) + key_len;
 127         buf = os_zalloc(sizeof(*hdr) + len);
 128         if (buf == NULL)
 129                 return;
 130
 131         hdr = (struct ieee802_1x_hdr *) buf;
 132         key = (struct ieee802_1x_eapol_key *) (hdr + 1);
 133         key->type = EAPOL_KEY_TYPE_RC4;
 134         WPA_PUT_BE16(key->key_length, key_len);
 135         wpa_get_ntp_timestamp(key->replay_counter);
 136
 137         if (random_get_bytes(key->key_iv, sizeof(key->key_iv))) {
 138                 wpa_printf(MSG_ERROR, "Could not get random numbers");
 139                 os_free(buf);
 140                 return;
 141         }
 142
 143         key->key_index = idx | (broadcast ? 0 : BIT(7));
 144         if (hapd->conf->eapol_key_index_workaround) {
 145                 /* According to some information, WinXP Supplicant seems to
 146                  * interpret bit7 as an indication whether the key is to be
 147                  * activated, so make it possible to enable workaround that
 148                  * sets this bit for all keys. */
 149                 key->key_index |= BIT(7);
 150         }
 151
 152         /* Key is encrypted using "Key-IV + MSK[0..31]" as the RC4-key and
 153          * MSK[32..63] is used to sign the message. */
 154         if (sm->eap_if->eapKeyData == NULL || sm->eap_if->eapKeyDataLen < 64) {
 155                 wpa_printf(MSG_ERROR, "No eapKeyData available for encrypting "
 156                            "and signing EAPOL-Key");
 157                 os_free(buf);
 158                 return;
 159         }
 160         os_memcpy((u8 *) (key + 1), key_data, key_len);
 161         ekey_len = sizeof(key->key_iv) + 32;
 162         ekey = os_malloc(ekey_len);
 163         if (ekey == NULL) {
 164                 wpa_printf(MSG_ERROR, "Could not encrypt key");
 165                 os_free(buf);
 166                 return;
 167         }
 168         os_memcpy(ekey, key->key_iv, sizeof(key->key_iv));
 169         os_memcpy(ekey + sizeof(key->key_iv), sm->eap_if->eapKeyData, 32);
 170         rc4_skip(ekey, ekey_len, 0, (u8 *) (key + 1), key_len);
 171         os_free(ekey);
 172
 173         /* This header is needed here for HMAC-MD5, but it will be regenerated
 174          * in ieee802_1x_send() */
 175         hdr->version = hapd->conf->eapol_version;
 176         hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
 177         hdr->length = host_to_be16(len);
 178         hmac_md5(sm->eap_if->eapKeyData + 32, 32, buf, sizeof(*hdr) + len,
 179                  key->key_signature);
 180
 181         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key to " MACSTR
 182                    " (%s index=%d)", MAC2STR(sm->addr),
 183                    broadcast ? "broadcast" : "unicast", idx);
 184         ieee802_1x_send(hapd, sta, IEEE802_1X_TYPE_EAPOL_KEY, (u8 *) key, len);
 185         if (sta->eapol_sm)
 186                 sta->eapol_sm->dot1xAuthEapolFramesTx++;
 187         os_free(buf);
 188 }
 189
 190
 191 void ieee802_1x_tx_key(struct hostapd_data *hapd, struct sta_info *sta)
 192 {
 193         struct eapol_authenticator *eapol = hapd->eapol_auth;
 194         struct eapol_state_machine *sm = sta->eapol_sm;
 195
 196         if (sm == NULL || !sm->eap_if->eapKeyData)
 197                 return;
 198
 199         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key(s) to " MACSTR,
 200                    MAC2STR(sta->addr));
 201
 202 #ifndef CONFIG_NO_VLAN
 203         if (sta->vlan_id > 0 && sta->vlan_id <= MAX_VLAN_ID) {
 204                 wpa_printf(MSG_ERROR, "Using WEP with vlans is not supported.");
 205                 return;
 206         }
 207 #endif /* CONFIG_NO_VLAN */
 208
 209         if (eapol->default_wep_key) {
 210                 ieee802_1x_tx_key_one(hapd, sta, eapol->default_wep_key_idx, 1,
 211                                       eapol->default_wep_key,
 212                                       hapd->conf->default_wep_key_len);
 213         }
 214
 215         if (hapd->conf->individual_wep_key_len > 0) {
 216                 u8 *ikey;
 217                 ikey = os_malloc(hapd->conf->individual_wep_key_len);
 218                 if (ikey == NULL ||
 219                     random_get_bytes(ikey, hapd->conf->individual_wep_key_len))
 220                 {
 221                         wpa_printf(MSG_ERROR, "Could not generate random "
 222                                    "individual WEP key.");
 223                         os_free(ikey);
 224                         return;
 225                 }
 226
 227                 wpa_hexdump_key(MSG_DEBUG, "Individual WEP key",
 228                                 ikey, hapd->conf->individual_wep_key_len);
 229
 230                 ieee802_1x_tx_key_one(hapd, sta, 0, 0, ikey,
 231                                       hapd->conf->individual_wep_key_len);
 232
 233                 /* TODO: set encryption in TX callback, i.e., only after STA
 234                  * has ACKed EAPOL-Key frame */
 235                 if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
 236                                         sta->addr, 0, 1, NULL, 0, ikey,
 237                                         hapd->conf->individual_wep_key_len)) {
 238                         wpa_printf(MSG_ERROR, "Could not set individual WEP "
 239                                    "encryption.");
 240                 }
 241
 242                 os_free(ikey);
 243         }
 244 }
 245
 246
 247 const char *radius_mode_txt(struct hostapd_data *hapd)
 248 {
 249         switch (hapd->iface->conf->hw_mode) {
 250         case HOSTAPD_MODE_IEEE80211AD:
 251                 return "802.11ad";
 252         case HOSTAPD_MODE_IEEE80211A:
 253                 return "802.11a";
 254         case HOSTAPD_MODE_IEEE80211G:
 255                 return "802.11g";
 256         case HOSTAPD_MODE_IEEE80211B:
 257         default:
 258                 return "802.11b";
 259         }
 260 }
 261
 262
 263 int radius_sta_rate(struct hostapd_data *hapd, struct sta_info *sta)
 264 {
 265         int i;
 266         u8 rate = 0;
 267
 268         for (i = 0; i < sta->supported_rates_len; i++)
 269                 if ((sta->supported_rates[i] & 0x7f) > rate)
 270                         rate = sta->supported_rates[i] & 0x7f;
 271
 272         return rate;
 273 }
 274
 275
 276 #ifndef CONFIG_NO_RADIUS
 277 static void ieee802_1x_learn_identity(struct hostapd_data *hapd,
 278                                       struct eapol_state_machine *sm,
 279                                       const u8 *eap, size_t len)
 280 {
 281         const u8 *identity;
 282         size_t identity_len;
 283
 284         if (len <= sizeof(struct eap_hdr) ||
 285             eap[sizeof(struct eap_hdr)] != EAP_TYPE_IDENTITY)
 286                 return;
 287
 288         identity = eap_get_identity(sm->eap, &identity_len);
 289         if (identity == NULL)
 290                 return;
 291
 292         /* Save station identity for future RADIUS packets */
 293         os_free(sm->identity);
 294         sm->identity = (u8 *) dup_binstr(identity, identity_len);
 295         if (sm->identity == NULL) {
 296                 sm->identity_len = 0;
 297                 return;
 298         }
 299
 300         sm->identity_len = identity_len;
 301         hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
 302                        HOSTAPD_LEVEL_DEBUG, "STA identity '%s'", sm->identity);
 303         sm->dot1xAuthEapolRespIdFramesRx++;
 304 }
 305
 306
 307 static int add_common_radius_sta_attr(struct hostapd_data *hapd,
 308                                       struct hostapd_radius_attr *req_attr,
 309                                       struct sta_info *sta,
 310                                       struct radius_msg *msg)
 311 {
 312         char buf[128];
 313
 314         if (!hostapd_config_get_radius_attr(req_attr,
 315                                             RADIUS_ATTR_NAS_PORT) &&
 316             !radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT, sta->aid)) {
 317                 wpa_printf(MSG_ERROR, "Could not add NAS-Port");
 318                 return -1;
 319         }
 320
 321         os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
 322                     MAC2STR(sta->addr));
 323         buf[sizeof(buf) - 1] = '\0';
 324         if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID,
 325                                  (u8 *) buf, os_strlen(buf))) {
 326                 wpa_printf(MSG_ERROR, "Could not add Calling-Station-Id");
 327                 return -1;
 328         }
 329
 330         if (sta->flags & WLAN_STA_PREAUTH) {
 331                 os_strlcpy(buf, "IEEE 802.11i Pre-Authentication",
 332                            sizeof(buf));
 333         } else {
 334                 os_snprintf(buf, sizeof(buf), "CONNECT %d%sMbps %s",
 335                             radius_sta_rate(hapd, sta) / 2,
 336                             (radius_sta_rate(hapd, sta) & 1) ? ".5" : "",
 337                             radius_mode_txt(hapd));
 338                 buf[sizeof(buf) - 1] = '\0';
 339         }
 340         if (!hostapd_config_get_radius_attr(req_attr,
 341                                             RADIUS_ATTR_CONNECT_INFO) &&
 342             !radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO,
 343                                  (u8 *) buf, os_strlen(buf))) {
 344                 wpa_printf(MSG_ERROR, "Could not add Connect-Info");
 345                 return -1;
 346         }
 347
 348         if (sta->acct_session_id_hi || sta->acct_session_id_lo) {
 349                 os_snprintf(buf, sizeof(buf), "%08X-%08X",
 350                             sta->acct_session_id_hi, sta->acct_session_id_lo);
 351                 if (!radius_msg_add_attr(msg, RADIUS_ATTR_ACCT_SESSION_ID,
 352                                          (u8 *) buf, os_strlen(buf))) {
 353                         wpa_printf(MSG_ERROR, "Could not add Acct-Session-Id");
 354                         return -1;
 355                 }
 356         }
 357
 358         return 0;
 359 }
 360
 361
 362 int add_common_radius_attr(struct hostapd_data *hapd,
 363                            struct hostapd_radius_attr *req_attr,
 364                            struct sta_info *sta,
 365                            struct radius_msg *msg)
 366 {
 367         char buf[128];
 368         struct hostapd_radius_attr *attr;
 369
 370         if (!hostapd_config_get_radius_attr(req_attr,
 371                                             RADIUS_ATTR_NAS_IP_ADDRESS) &&
 372             hapd->conf->own_ip_addr.af == AF_INET &&
 373             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS,
 374                                  (u8 *) &hapd->conf->own_ip_addr.u.v4, 4)) {
 375                 wpa_printf(MSG_ERROR, "Could not add NAS-IP-Address");
 376                 return -1;
 377         }
 378
 379 #ifdef CONFIG_IPV6
 380         if (!hostapd_config_get_radius_attr(req_attr,
 381                                             RADIUS_ATTR_NAS_IPV6_ADDRESS) &&
 382             hapd->conf->own_ip_addr.af == AF_INET6 &&
 383             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IPV6_ADDRESS,
 384                                  (u8 *) &hapd->conf->own_ip_addr.u.v6, 16)) {
 385                 wpa_printf(MSG_ERROR, "Could not add NAS-IPv6-Address");
 386                 return -1;
 387         }
 388 #endif /* CONFIG_IPV6 */
 389
 390         if (!hostapd_config_get_radius_attr(req_attr,
 391                                             RADIUS_ATTR_NAS_IDENTIFIER) &&
 392             hapd->conf->nas_identifier &&
 393             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IDENTIFIER,
 394                                  (u8 *) hapd->conf->nas_identifier,
 395                                  os_strlen(hapd->conf->nas_identifier))) {
 396                 wpa_printf(MSG_ERROR, "Could not add NAS-Identifier");
 397                 return -1;
 398         }
 399
 400         os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT ":%s",
 401                     MAC2STR(hapd->own_addr),
 402                     wpa_ssid_txt(hapd->conf->ssid.ssid,
 403                                  hapd->conf->ssid.ssid_len));
 404         buf[sizeof(buf) - 1] = '\0';
 405         if (!hostapd_config_get_radius_attr(req_attr,
 406                                             RADIUS_ATTR_CALLED_STATION_ID) &&
 407             !radius_msg_add_attr(msg, RADIUS_ATTR_CALLED_STATION_ID,
 408                                  (u8 *) buf, os_strlen(buf))) {
 409                 wpa_printf(MSG_ERROR, "Could not add Called-Station-Id");
 410                 return -1;
 411         }
 412
 413         if (!hostapd_config_get_radius_attr(req_attr,
 414                                             RADIUS_ATTR_NAS_PORT_TYPE) &&
 415             !radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT_TYPE,
 416                                        RADIUS_NAS_PORT_TYPE_IEEE_802_11)) {
 417                 wpa_printf(MSG_ERROR, "Could not add NAS-Port-Type");
 418                 return -1;
 419         }
 420
 421         if (sta && add_common_radius_sta_attr(hapd, req_attr, sta, msg) < 0)
 422                 return -1;
 423
 424         for (attr = req_attr; attr; attr = attr->next) {
 425                 if (!radius_msg_add_attr(msg, attr->type,
 426                                          wpabuf_head(attr->val),
 427                                          wpabuf_len(attr->val))) {
 428                         wpa_printf(MSG_ERROR, "Could not add RADIUS "
 429                                    "attribute");
 430                         return -1;
 431                 }
 432         }
 433
 434         return 0;
 435 }
 436
 437
 438 static void ieee802_1x_encapsulate_radius(struct hostapd_data *hapd,
 439                                           struct sta_info *sta,
 440                                           const u8 *eap, size_t len)
 441 {
 442         struct radius_msg *msg;
 443         struct eapol_state_machine *sm = sta->eapol_sm;
 444
 445         if (sm == NULL)
 446                 return;
 447
 448         ieee802_1x_learn_identity(hapd, sm, eap, len);
 449
 450         wpa_printf(MSG_DEBUG, "Encapsulating EAP message into a RADIUS "
 451                    "packet");
 452
 453         sm->radius_identifier = radius_client_get_id(hapd->radius);
 454         msg = radius_msg_new(RADIUS_CODE_ACCESS_REQUEST,
 455                              sm->radius_identifier);
 456         if (msg == NULL) {
 457                 wpa_printf(MSG_INFO, "Could not create new RADIUS packet");
 458                 return;
 459         }
 460
 461         radius_msg_make_authenticator(msg, (u8 *) sta, sizeof(*sta));
 462
 463         if (sm->identity &&
 464             !radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME,
 465                                  sm->identity, sm->identity_len)) {
 466                 wpa_printf(MSG_INFO, "Could not add User-Name");
 467                 goto fail;
 468         }
 469
 470         if (add_common_radius_attr(hapd, hapd->conf->radius_auth_req_attr, sta,
 471                                    msg) < 0)
 472                 goto fail;
 473
 474         /* TODO: should probably check MTU from driver config; 2304 is max for
 475          * IEEE 802.11, but use 1400 to avoid problems with too large packets
 476          */
 477         if (!hostapd_config_get_radius_attr(hapd->conf->radius_auth_req_attr,
 478                                             RADIUS_ATTR_FRAMED_MTU) &&
 479             !radius_msg_add_attr_int32(msg, RADIUS_ATTR_FRAMED_MTU, 1400)) {
 480                 wpa_printf(MSG_INFO, "Could not add Framed-MTU");
 481                 goto fail;
 482         }
 483
 484         if (eap && !radius_msg_add_eap(msg, eap, len)) {
 485                 wpa_printf(MSG_INFO, "Could not add EAP-Message");
 486                 goto fail;
 487         }
 488
 489         /* State attribute must be copied if and only if this packet is
 490          * Access-Request reply to the previous Access-Challenge */
 491         if (sm->last_recv_radius &&
 492             radius_msg_get_hdr(sm->last_recv_radius)->code ==
 493             RADIUS_CODE_ACCESS_CHALLENGE) {
 494                 int res = radius_msg_copy_attr(msg, sm->last_recv_radius,
 495                                                RADIUS_ATTR_STATE);
 496                 if (res < 0) {
 497                         wpa_printf(MSG_INFO, "Could not copy State attribute from previous Access-Challenge");
 498                         goto fail;
 499                 }
 500                 if (res > 0) {
 501                         wpa_printf(MSG_DEBUG, "Copied RADIUS State Attribute");
 502                 }
 503         }
 504
 505         if (hapd->conf->radius_request_cui) {
 506                 const u8 *cui;
 507                 size_t cui_len;
 508                 /* Add previously learned CUI or nul CUI to request CUI */
 509                 if (sm->radius_cui) {
 510                         cui = wpabuf_head(sm->radius_cui);
 511                         cui_len = wpabuf_len(sm->radius_cui);
 512                 } else {
 513                         cui = (const u8 *) "\0";
 514                         cui_len = 1;
 515                 }
 516                 if (!radius_msg_add_attr(msg,
 517                                          RADIUS_ATTR_CHARGEABLE_USER_IDENTITY,
 518                                          cui, cui_len)) {
 519                         wpa_printf(MSG_ERROR, "Could not add CUI");
 520                         goto fail;
 521                 }
 522         }
 523
 524         if (radius_client_send(hapd->radius, msg, RADIUS_AUTH, sta->addr) < 0)
 525                 goto fail;
 526
 527         return;
 528
 529  fail:
 530         radius_msg_free(msg);
 531 }
 532 #endif /* CONFIG_NO_RADIUS */
 533
 534
 535 static void handle_eap_response(struct hostapd_data *hapd,
 536                                 struct sta_info *sta, struct eap_hdr *eap,
 537                                 size_t len)
 538 {
 539         u8 type, *data;
 540         struct eapol_state_machine *sm = sta->eapol_sm;
 541         if (sm == NULL)
 542                 return;
 543
 544         data = (u8 *) (eap + 1);
 545
 546         if (len < sizeof(*eap) + 1) {
 547                 wpa_printf(MSG_INFO, "handle_eap_response: too short response data");
 548                 return;
 549         }
 550
 551         sm->eap_type_supp = type = data[0];
 552
 553         hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
 554                        HOSTAPD_LEVEL_DEBUG, "received EAP packet (code=%d "
 555                        "id=%d len=%d) from STA: EAP Response-%s (%d)",
 556                        eap->code, eap->identifier, be_to_host16(eap->length),
 557                        eap_server_get_name(0, type), type);
 558
 559         sm->dot1xAuthEapolRespFramesRx++;
 560
 561         wpabuf_free(sm->eap_if->eapRespData);
 562         sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len);
 563         sm->eapolEap = TRUE;
 564 }
 565
 566
 567 /* Process incoming EAP packet from Supplicant */
 568 static void handle_eap(struct hostapd_data *hapd, struct sta_info *sta,
 569                        u8 *buf, size_t len)
 570 {
 571         struct eap_hdr *eap;
 572         u16 eap_len;
 573
 574         if (len < sizeof(*eap)) {
 575                 wpa_printf(MSG_INFO, "   too short EAP packet");
 576                 return;
 577         }
 578
 579         eap = (struct eap_hdr *) buf;
 580
 581         eap_len = be_to_host16(eap->length);
 582         wpa_printf(MSG_DEBUG, "EAP: code=%d identifier=%d length=%d",
 583                    eap->code, eap->identifier, eap_len);
 584         if (eap_len < sizeof(*eap)) {
 585                 wpa_printf(MSG_DEBUG, "   Invalid EAP length");
 586                 return;
 587         } else if (eap_len > len) {
 588                 wpa_printf(MSG_DEBUG, "   Too short frame to contain this EAP "
 589                            "packet");
 590                 return;
 591         } else if (eap_len < len) {
 592                 wpa_printf(MSG_DEBUG, "   Ignoring %lu extra bytes after EAP "
 593                            "packet", (unsigned long) len - eap_len);
 594         }
 595
 596         switch (eap->code) {
 597         case EAP_CODE_REQUEST:
 598                 wpa_printf(MSG_DEBUG, " (request)");
 599                 return;
 600         case EAP_CODE_RESPONSE:
 601                 wpa_printf(MSG_DEBUG, " (response)");
 602                 handle_eap_response(hapd, sta, eap, eap_len);
 603                 break;
 604         case EAP_CODE_SUCCESS:
 605                 wpa_printf(MSG_DEBUG, " (success)");
 606                 return;
 607         case EAP_CODE_FAILURE:
 608                 wpa_printf(MSG_DEBUG, " (failure)");
 609                 return;
 610         default:
 611                 wpa_printf(MSG_DEBUG, " (unknown code)");
 612                 return;
 613         }
 614 }
 615
 616
 617 static struct eapol_state_machine *
 618 ieee802_1x_alloc_eapol_sm(struct hostapd_data *hapd, struct sta_info *sta)
 619 {
 620         int flags = 0;
 621         if (sta->flags & WLAN_STA_PREAUTH)
 622                 flags |= EAPOL_SM_PREAUTH;
 623         if (sta->wpa_sm) {
 624                 flags |= EAPOL_SM_USES_WPA;
 625                 if (wpa_auth_sta_get_pmksa(sta->wpa_sm))
 626                         flags |= EAPOL_SM_FROM_PMKSA_CACHE;
 627         }
 628         return eapol_auth_alloc(hapd->eapol_auth, sta->addr, flags,
 629                                 sta->wps_ie, sta->p2p_ie, sta,
 630                                 sta->identity, sta->radius_cui);
 631 }
 632
 633
 634 /**
 635  * ieee802_1x_receive - Process the EAPOL frames from the Supplicant
 636  * @hapd: hostapd BSS data
 637  * @sa: Source address (sender of the EAPOL frame)
 638  * @buf: EAPOL frame
 639  * @len: Length of buf in octets
 640  *
 641  * This function is called for each incoming EAPOL frame from the interface
 642  */
 643 void ieee802_1x_receive(struct hostapd_data *hapd, const u8 *sa, const u8 *buf,
 644                         size_t len)
 645 {
 646         struct sta_info *sta;
 647         struct ieee802_1x_hdr *hdr;
 648         struct ieee802_1x_eapol_key *key;
 649         u16 datalen;
 650         struct rsn_pmksa_cache_entry *pmksa;
 651         int key_mgmt;
 652
 653         if (!hapd->conf->ieee802_1x && !hapd->conf->wpa &&
 654             !hapd->conf->wps_state)
 655                 return;
 656
 657         wpa_printf(MSG_DEBUG, "IEEE 802.1X: %lu bytes from " MACSTR,
 658                    (unsigned long) len, MAC2STR(sa));
 659         sta = ap_get_sta(hapd, sa);
 660         if (!sta || (!(sta->flags & (WLAN_STA_ASSOC | WLAN_STA_PREAUTH)) &&
 661                      !(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_WIRED))) {
 662                 wpa_printf(MSG_DEBUG, "IEEE 802.1X data frame from not "
 663                            "associated/Pre-authenticating STA");
 664                 return;
 665         }
 666
 667         if (len < sizeof(*hdr)) {
 668                 wpa_printf(MSG_INFO, "   too short IEEE 802.1X packet");
 669                 return;
 670         }
 671
 672         hdr = (struct ieee802_1x_hdr *) buf;
 673         datalen = be_to_host16(hdr->length);
 674         wpa_printf(MSG_DEBUG, "   IEEE 802.1X: version=%d type=%d length=%d",
 675                    hdr->version, hdr->type, datalen);
 676
 677         if (len - sizeof(*hdr) < datalen) {
 678                 wpa_printf(MSG_INFO, "   frame too short for this IEEE 802.1X packet");
 679                 if (sta->eapol_sm)
 680                         sta->eapol_sm->dot1xAuthEapLengthErrorFramesRx++;
 681                 return;
 682         }
 683         if (len - sizeof(*hdr) > datalen) {
 684                 wpa_printf(MSG_DEBUG, "   ignoring %lu extra octets after "
 685                            "IEEE 802.1X packet",
 686                            (unsigned long) len - sizeof(*hdr) - datalen);
 687         }
 688
 689         if (sta->eapol_sm) {
 690                 sta->eapol_sm->dot1xAuthLastEapolFrameVersion = hdr->version;
 691                 sta->eapol_sm->dot1xAuthEapolFramesRx++;
 692         }
 693
 694         key = (struct ieee802_1x_eapol_key *) (hdr + 1);
 695         if (datalen >= sizeof(struct ieee802_1x_eapol_key) &&
 696             hdr->type == IEEE802_1X_TYPE_EAPOL_KEY &&
 697             (key->type == EAPOL_KEY_TYPE_WPA ||
 698              key->type == EAPOL_KEY_TYPE_RSN)) {
 699                 wpa_receive(hapd->wpa_auth, sta->wpa_sm, (u8 *) hdr,
 700                             sizeof(*hdr) + datalen);
 701                 return;
 702         }
 703
 704         if (!hapd->conf->ieee802_1x &&
 705             !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) {
 706                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore EAPOL message - "
 707                            "802.1X not enabled and WPS not used");
 708                 return;
 709         }
 710
 711         key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm);
 712         if (key_mgmt != -1 && wpa_key_mgmt_wpa_psk(key_mgmt)) {
 713                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore EAPOL message - "
 714                            "STA is using PSK");
 715                 return;
 716         }
 717
 718         if (!sta->eapol_sm) {
 719                 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
 720                 if (!sta->eapol_sm)
 721                         return;
 722
 723 #ifdef CONFIG_WPS
 724                 if (!hapd->conf->ieee802_1x) {
 725                         u32 wflags = sta->flags & (WLAN_STA_WPS |
 726                                                    WLAN_STA_WPS2 |
 727                                                    WLAN_STA_MAYBE_WPS);
 728                         if (wflags == WLAN_STA_MAYBE_WPS ||
 729                             wflags == (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) {
 730                                 /*
 731                                  * Delay EAPOL frame transmission until a
 732                                  * possible WPS STA initiates the handshake
 733                                  * with EAPOL-Start. Only allow the wait to be
 734                                  * skipped if the STA is known to support WPS
 735                                  * 2.0.
 736                                  */
 737                                 wpa_printf(MSG_DEBUG, "WPS: Do not start "
 738                                            "EAPOL until EAPOL-Start is "
 739                                            "received");
 740                                 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
 741                         }
 742                 }
 743 #endif /* CONFIG_WPS */
 744
 745                 sta->eapol_sm->eap_if->portEnabled = TRUE;
 746         }
 747
 748         /* since we support version 1, we can ignore version field and proceed
 749          * as specified in version 1 standard [IEEE Std 802.1X-2001, 7.5.5] */
 750         /* TODO: actually, we are not version 1 anymore.. However, Version 2
 751          * does not change frame contents, so should be ok to process frames
 752          * more or less identically. Some changes might be needed for
 753          * verification of fields. */
 754
 755         switch (hdr->type) {
 756         case IEEE802_1X_TYPE_EAP_PACKET:
 757                 handle_eap(hapd, sta, (u8 *) (hdr + 1), datalen);
 758                 break;
 759
 760         case IEEE802_1X_TYPE_EAPOL_START:
 761                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 762                                HOSTAPD_LEVEL_DEBUG, "received EAPOL-Start "
 763                                "from STA");
 764                 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
 765                 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
 766                 if (pmksa) {
 767                         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
 768                                        HOSTAPD_LEVEL_DEBUG, "cached PMKSA "
 769                                        "available - ignore it since "
 770                                        "STA sent EAPOL-Start");
 771                         wpa_auth_sta_clear_pmksa(sta->wpa_sm, pmksa);
 772                 }
 773                 sta->eapol_sm->eapolStart = TRUE;
 774                 sta->eapol_sm->dot1xAuthEapolStartFramesRx++;
 775                 eap_server_clear_identity(sta->eapol_sm->eap);
 776                 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
 777                 break;
 778
 779         case IEEE802_1X_TYPE_EAPOL_LOGOFF:
 780                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 781                                HOSTAPD_LEVEL_DEBUG, "received EAPOL-Logoff "
 782                                "from STA");
 783                 sta->acct_terminate_cause =
 784                         RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
 785                 accounting_sta_stop(hapd, sta);
 786                 sta->eapol_sm->eapolLogoff = TRUE;
 787                 sta->eapol_sm->dot1xAuthEapolLogoffFramesRx++;
 788                 eap_server_clear_identity(sta->eapol_sm->eap);
 789                 break;
 790
 791         case IEEE802_1X_TYPE_EAPOL_KEY:
 792                 wpa_printf(MSG_DEBUG, "   EAPOL-Key");
 793                 if (!ap_sta_is_authorized(sta)) {
 794                         wpa_printf(MSG_DEBUG, "   Dropped key data from "
 795                                    "unauthorized Supplicant");
 796                         break;
 797                 }
 798                 break;
 799
 800         case IEEE802_1X_TYPE_EAPOL_ENCAPSULATED_ASF_ALERT:
 801                 wpa_printf(MSG_DEBUG, "   EAPOL-Encapsulated-ASF-Alert");
 802                 /* TODO: implement support for this; show data */
 803                 break;
 804
 805         default:
 806                 wpa_printf(MSG_DEBUG, "   unknown IEEE 802.1X packet type");
 807                 sta->eapol_sm->dot1xAuthInvalidEapolFramesRx++;
 808                 break;
 809         }
 810
 811         eapol_auth_step(sta->eapol_sm);
 812 }
 813
 814
 815 /**
 816  * ieee802_1x_new_station - Start IEEE 802.1X authentication
 817  * @hapd: hostapd BSS data
 818  * @sta: The station
 819  *
 820  * This function is called to start IEEE 802.1X authentication when a new
 821  * station completes IEEE 802.11 association.
 822  */
 823 void ieee802_1x_new_station(struct hostapd_data *hapd, struct sta_info *sta)
 824 {
 825         struct rsn_pmksa_cache_entry *pmksa;
 826         int reassoc = 1;
 827         int force_1x = 0;
 828         int key_mgmt;
 829
 830 #ifdef CONFIG_WPS
 831         if (hapd->conf->wps_state && hapd->conf->wpa &&
 832             (sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) {
 833                 /*
 834                  * Need to enable IEEE 802.1X/EAPOL state machines for possible
 835                  * WPS handshake even if IEEE 802.1X/EAPOL is not used for
 836                  * authentication in this BSS.
 837                  */
 838                 force_1x = 1;
 839         }
 840 #endif /* CONFIG_WPS */
 841
 842         if (!force_1x && !hapd->conf->ieee802_1x) {
 843                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - "
 844                            "802.1X not enabled or forced for WPS");
 845                 /*
 846                  * Clear any possible EAPOL authenticator state to support
 847                  * reassociation change from WPS to PSK.
 848                  */
 849                 ieee802_1x_free_station(sta);
 850                 return;
 851         }
 852
 853         key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm);
 854         if (key_mgmt != -1 && wpa_key_mgmt_wpa_psk(key_mgmt)) {
 855                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - using PSK");
 856                 /*
 857                  * Clear any possible EAPOL authenticator state to support
 858                  * reassociation change from WPA-EAP to PSK.
 859                  */
 860                 ieee802_1x_free_station(sta);
 861                 return;
 862         }
 863
 864         if (sta->eapol_sm == NULL) {
 865                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 866                                HOSTAPD_LEVEL_DEBUG, "start authentication");
 867                 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
 868                 if (sta->eapol_sm == NULL) {
 869                         hostapd_logger(hapd, sta->addr,
 870                                        HOSTAPD_MODULE_IEEE8021X,
 871                                        HOSTAPD_LEVEL_INFO,
 872                                        "failed to allocate state machine");
 873                         return;
 874                 }
 875                 reassoc = 0;
 876         }
 877
 878 #ifdef CONFIG_WPS
 879         sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
 880         if (!hapd->conf->ieee802_1x && !(sta->flags & WLAN_STA_WPS2)) {
 881                 /*
 882                  * Delay EAPOL frame transmission until a possible WPS STA
 883                  * initiates the handshake with EAPOL-Start. Only allow the
 884                  * wait to be skipped if the STA is known to support WPS 2.0.
 885                  */
 886                 wpa_printf(MSG_DEBUG, "WPS: Do not start EAPOL until "
 887                            "EAPOL-Start is received");
 888                 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
 889         }
 890 #endif /* CONFIG_WPS */
 891
 892         sta->eapol_sm->eap_if->portEnabled = TRUE;
 893
 894 #ifdef CONFIG_IEEE80211R
 895         if (sta->auth_alg == WLAN_AUTH_FT) {
 896                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 897                                HOSTAPD_LEVEL_DEBUG,
 898                                "PMK from FT - skip IEEE 802.1X/EAP");
 899                 /* Setup EAPOL state machines to already authenticated state
 900                  * because of existing FT information from R0KH. */
 901                 sta->eapol_sm->keyRun = TRUE;
 902                 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
 903                 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
 904                 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
 905                 sta->eapol_sm->authSuccess = TRUE;
 906                 sta->eapol_sm->authFail = FALSE;
 907                 if (sta->eapol_sm->eap)
 908                         eap_sm_notify_cached(sta->eapol_sm->eap);
 909                 /* TODO: get vlan_id from R0KH using RRB message */
 910                 return;
 911         }
 912 #endif /* CONFIG_IEEE80211R */
 913
 914         pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
 915         if (pmksa) {
 916                 int old_vlanid;
 917
 918                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 919                                HOSTAPD_LEVEL_DEBUG,
 920                                "PMK from PMKSA cache - skip IEEE 802.1X/EAP");
 921                 /* Setup EAPOL state machines to already authenticated state
 922                  * because of existing PMKSA information in the cache. */
 923                 sta->eapol_sm->keyRun = TRUE;
 924                 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
 925                 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
 926                 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
 927                 sta->eapol_sm->authSuccess = TRUE;
 928                 sta->eapol_sm->authFail = FALSE;
 929                 if (sta->eapol_sm->eap)
 930                         eap_sm_notify_cached(sta->eapol_sm->eap);
 931                 old_vlanid = sta->vlan_id;
 932                 pmksa_cache_to_eapol_data(pmksa, sta->eapol_sm);
 933                 if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
 934                         sta->vlan_id = 0;
 935                 ap_sta_bind_vlan(hapd, sta, old_vlanid);
 936         } else {
 937                 if (reassoc) {
 938                         /*
 939                          * Force EAPOL state machines to start
 940                          * re-authentication without having to wait for the
 941                          * Supplicant to send EAPOL-Start.
 942                          */
 943                         sta->eapol_sm->reAuthenticate = TRUE;
 944                 }
 945                 eapol_auth_step(sta->eapol_sm);
 946         }
 947 }
 948
 949
 950 void ieee802_1x_free_station(struct sta_info *sta)
 951 {
 952         struct eapol_state_machine *sm = sta->eapol_sm;
 953
 954         if (sm == NULL)
 955                 return;
 956
 957         sta->eapol_sm = NULL;
 958
 959 #ifndef CONFIG_NO_RADIUS
 960         radius_msg_free(sm->last_recv_radius);
 961         radius_free_class(&sm->radius_class);
 962         wpabuf_free(sm->radius_cui);
 963 #endif /* CONFIG_NO_RADIUS */
 964
 965         os_free(sm->identity);
 966         eapol_auth_free(sm);
 967 }
 968
 969
 970 #ifndef CONFIG_NO_RADIUS
 971 static void ieee802_1x_decapsulate_radius(struct hostapd_data *hapd,
 972                                           struct sta_info *sta)
 973 {
 974         struct wpabuf *eap;
 975         const struct eap_hdr *hdr;
 976         int eap_type = -1;
 977         char buf[64];
 978         struct radius_msg *msg;
 979         struct eapol_state_machine *sm = sta->eapol_sm;
 980
 981         if (sm == NULL || sm->last_recv_radius == NULL) {
 982                 if (sm)
 983                         sm->eap_if->aaaEapNoReq = TRUE;
 984                 return;
 985         }
 986
 987         msg = sm->last_recv_radius;
 988
 989         eap = radius_msg_get_eap(msg);
 990         if (eap == NULL) {
 991                 /* RFC 3579, Chap. 2.6.3:
 992                  * RADIUS server SHOULD NOT send Access-Reject/no EAP-Message
 993                  * attribute */
 994                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 995                                HOSTAPD_LEVEL_WARNING, "could not extract "
 996                                "EAP-Message from RADIUS message");
 997                 sm->eap_if->aaaEapNoReq = TRUE;
 998                 return;
 999         }
1000
1001         if (wpabuf_len(eap) < sizeof(*hdr)) {
1002                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1003                                HOSTAPD_LEVEL_WARNING, "too short EAP packet "
1004                                "received from authentication server");
1005                 wpabuf_free(eap);
1006                 sm->eap_if->aaaEapNoReq = TRUE;
1007                 return;
1008         }
1009
1010         if (wpabuf_len(eap) > sizeof(*hdr))
1011                 eap_type = (wpabuf_head_u8(eap))[sizeof(*hdr)];
1012
1013         hdr = wpabuf_head(eap);
1014         switch (hdr->code) {
1015         case EAP_CODE_REQUEST:
1016                 if (eap_type >= 0)
1017                         sm->eap_type_authsrv = eap_type;
1018                 os_snprintf(buf, sizeof(buf), "EAP-Request-%s (%d)",
1019                             eap_type >= 0 ? eap_server_get_name(0, eap_type) :
1020                             "??",
1021                             eap_type);
1022                 break;
1023         case EAP_CODE_RESPONSE:
1024                 os_snprintf(buf, sizeof(buf), "EAP Response-%s (%d)",
1025                             eap_type >= 0 ? eap_server_get_name(0, eap_type) :
1026                             "??",
1027                             eap_type);
1028                 break;
1029         case EAP_CODE_SUCCESS:
1030                 os_strlcpy(buf, "EAP Success", sizeof(buf));
1031                 break;
1032         case EAP_CODE_FAILURE:
1033                 os_strlcpy(buf, "EAP Failure", sizeof(buf));
1034                 break;
1035         default:
1036                 os_strlcpy(buf, "unknown EAP code", sizeof(buf));
1037                 break;
1038         }
1039         buf[sizeof(buf) - 1] = '\0';
1040         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1041                        HOSTAPD_LEVEL_DEBUG, "decapsulated EAP packet (code=%d "
1042                        "id=%d len=%d) from RADIUS server: %s",
1043                        hdr->code, hdr->identifier, be_to_host16(hdr->length),
1044                        buf);
1045         sm->eap_if->aaaEapReq = TRUE;
1046
1047         wpabuf_free(sm->eap_if->aaaEapReqData);
1048         sm->eap_if->aaaEapReqData = eap;
1049 }
1050
1051
1052 static void ieee802_1x_get_keys(struct hostapd_data *hapd,
1053                                 struct sta_info *sta, struct radius_msg *msg,
1054                                 struct radius_msg *req,
1055                                 const u8 *shared_secret,
1056                                 size_t shared_secret_len)
1057 {
1058         struct radius_ms_mppe_keys *keys;
1059         struct eapol_state_machine *sm = sta->eapol_sm;
1060         if (sm == NULL)
1061                 return;
1062
1063         keys = radius_msg_get_ms_keys(msg, req, shared_secret,
1064                                       shared_secret_len);
1065
1066         if (keys && keys->send && keys->recv) {
1067                 size_t len = keys->send_len + keys->recv_len;
1068                 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Send-Key",
1069                                 keys->send, keys->send_len);
1070                 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Recv-Key",
1071                                 keys->recv, keys->recv_len);
1072
1073                 os_free(sm->eap_if->aaaEapKeyData);
1074                 sm->eap_if->aaaEapKeyData = os_malloc(len);
1075                 if (sm->eap_if->aaaEapKeyData) {
1076                         os_memcpy(sm->eap_if->aaaEapKeyData, keys->recv,
1077                                   keys->recv_len);
1078                         os_memcpy(sm->eap_if->aaaEapKeyData + keys->recv_len,
1079                                   keys->send, keys->send_len);
1080                         sm->eap_if->aaaEapKeyDataLen = len;
1081                         sm->eap_if->aaaEapKeyAvailable = TRUE;
1082                 }
1083         }
1084
1085         if (keys) {
1086                 os_free(keys->send);
1087                 os_free(keys->recv);
1088                 os_free(keys);
1089         }
1090 }
1091
1092
1093 static void ieee802_1x_store_radius_class(struct hostapd_data *hapd,
1094                                           struct sta_info *sta,
1095                                           struct radius_msg *msg)
1096 {
1097         u8 *class;
1098         size_t class_len;
1099         struct eapol_state_machine *sm = sta->eapol_sm;
1100         int count, i;
1101         struct radius_attr_data *nclass;
1102         size_t nclass_count;
1103
1104         if (!hapd->conf->radius->acct_server || hapd->radius == NULL ||
1105             sm == NULL)
1106                 return;
1107
1108         radius_free_class(&sm->radius_class);
1109         count = radius_msg_count_attr(msg, RADIUS_ATTR_CLASS, 1);
1110         if (count <= 0)
1111                 return;
1112
1113         nclass = os_calloc(count, sizeof(struct radius_attr_data));
1114         if (nclass == NULL)
1115                 return;
1116
1117         nclass_count = 0;
1118
1119         class = NULL;
1120         for (i = 0; i < count; i++) {
1121                 do {
1122                         if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CLASS,
1123                                                     &class, &class_len,
1124                                                     class) < 0) {
1125                                 i = count;
1126                                 break;
1127                         }
1128                 } while (class_len < 1);
1129
1130                 nclass[nclass_count].data = os_malloc(class_len);
1131                 if (nclass[nclass_count].data == NULL)
1132                         break;
1133
1134                 os_memcpy(nclass[nclass_count].data, class, class_len);
1135                 nclass[nclass_count].len = class_len;
1136                 nclass_count++;
1137         }
1138
1139         sm->radius_class.attr = nclass;
1140         sm->radius_class.count = nclass_count;
1141         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Stored %lu RADIUS Class "
1142                    "attributes for " MACSTR,
1143                    (unsigned long) sm->radius_class.count,
1144                    MAC2STR(sta->addr));
1145 }
1146
1147
1148 /* Update sta->identity based on User-Name attribute in Access-Accept */
1149 static void ieee802_1x_update_sta_identity(struct hostapd_data *hapd,
1150                                            struct sta_info *sta,
1151                                            struct radius_msg *msg)
1152 {
1153         u8 *buf, *identity;
1154         size_t len;
1155         struct eapol_state_machine *sm = sta->eapol_sm;
1156
1157         if (sm == NULL)
1158                 return;
1159
1160         if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_USER_NAME, &buf, &len,
1161                                     NULL) < 0)
1162                 return;
1163
1164         identity = (u8 *) dup_binstr(buf, len);
1165         if (identity == NULL)
1166                 return;
1167
1168         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1169                        HOSTAPD_LEVEL_DEBUG, "old identity '%s' updated with "
1170                        "User-Name from Access-Accept '%s'",
1171                        sm->identity ? (char *) sm->identity : "N/A",
1172                        (char *) identity);
1173
1174         os_free(sm->identity);
1175         sm->identity = identity;
1176         sm->identity_len = len;
1177 }
1178
1179
1180 /* Update CUI based on Chargeable-User-Identity attribute in Access-Accept */
1181 static void ieee802_1x_update_sta_cui(struct hostapd_data *hapd,
1182                                       struct sta_info *sta,
1183                                       struct radius_msg *msg)
1184 {
1185         struct eapol_state_machine *sm = sta->eapol_sm;
1186         struct wpabuf *cui;
1187         u8 *buf;
1188         size_t len;
1189
1190         if (sm == NULL)
1191                 return;
1192
1193         if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CHARGEABLE_USER_IDENTITY,
1194                                     &buf, &len, NULL) < 0)
1195                 return;
1196
1197         cui = wpabuf_alloc_copy(buf, len);
1198         if (cui == NULL)
1199                 return;
1200
1201         wpabuf_free(sm->radius_cui);
1202         sm->radius_cui = cui;
1203 }
1204
1205
1206 struct sta_id_search {
1207         u8 identifier;
1208         struct eapol_state_machine *sm;
1209 };
1210
1211
1212 static int ieee802_1x_select_radius_identifier(struct hostapd_data *hapd,
1213                                                struct sta_info *sta,
1214                                                void *ctx)
1215 {
1216         struct sta_id_search *id_search = ctx;
1217         struct eapol_state_machine *sm = sta->eapol_sm;
1218
1219         if (sm && sm->radius_identifier >= 0 &&
1220             sm->radius_identifier == id_search->identifier) {
1221                 id_search->sm = sm;
1222                 return 1;
1223         }
1224         return 0;
1225 }
1226
1227
1228 static struct eapol_state_machine *
1229 ieee802_1x_search_radius_identifier(struct hostapd_data *hapd, u8 identifier)
1230 {
1231         struct sta_id_search id_search;
1232         id_search.identifier = identifier;
1233         id_search.sm = NULL;
1234         ap_for_each_sta(hapd, ieee802_1x_select_radius_identifier, &id_search);
1235         return id_search.sm;
1236 }
1237
1238
1239 /**
1240  * ieee802_1x_receive_auth - Process RADIUS frames from Authentication Server
1241  * @msg: RADIUS response message
1242  * @req: RADIUS request message
1243  * @shared_secret: RADIUS shared secret
1244  * @shared_secret_len: Length of shared_secret in octets
1245  * @data: Context data (struct hostapd_data *)
1246  * Returns: Processing status
1247  */
1248 static RadiusRxResult
1249 ieee802_1x_receive_auth(struct radius_msg *msg, struct radius_msg *req,
1250                         const u8 *shared_secret, size_t shared_secret_len,
1251                         void *data)
1252 {
1253         struct hostapd_data *hapd = data;
1254         struct sta_info *sta;
1255         u32 session_timeout = 0, termination_action, acct_interim_interval;
1256         int session_timeout_set, old_vlanid = 0;
1257         struct eapol_state_machine *sm;
1258         int override_eapReq = 0;
1259         struct radius_hdr *hdr = radius_msg_get_hdr(msg);
1260
1261         sm = ieee802_1x_search_radius_identifier(hapd, hdr->identifier);
1262         if (sm == NULL) {
1263                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Could not find matching "
1264                            "station for this RADIUS message");
1265                 return RADIUS_RX_UNKNOWN;
1266         }
1267         sta = sm->sta;
1268
1269         /* RFC 2869, Ch. 5.13: valid Message-Authenticator attribute MUST be
1270          * present when packet contains an EAP-Message attribute */
1271         if (hdr->code == RADIUS_CODE_ACCESS_REJECT &&
1272             radius_msg_get_attr(msg, RADIUS_ATTR_MESSAGE_AUTHENTICATOR, NULL,
1273                                 0) < 0 &&
1274             radius_msg_get_attr(msg, RADIUS_ATTR_EAP_MESSAGE, NULL, 0) < 0) {
1275                 wpa_printf(MSG_DEBUG, "Allowing RADIUS Access-Reject without "
1276                            "Message-Authenticator since it does not include "
1277                            "EAP-Message");
1278         } else if (radius_msg_verify(msg, shared_secret, shared_secret_len,
1279                                      req, 1)) {
1280                 wpa_printf(MSG_INFO, "Incoming RADIUS packet did not have correct Message-Authenticator - dropped");
1281                 return RADIUS_RX_INVALID_AUTHENTICATOR;
1282         }
1283
1284         if (hdr->code != RADIUS_CODE_ACCESS_ACCEPT &&
1285             hdr->code != RADIUS_CODE_ACCESS_REJECT &&
1286             hdr->code != RADIUS_CODE_ACCESS_CHALLENGE) {
1287                 wpa_printf(MSG_INFO, "Unknown RADIUS message code");
1288                 return RADIUS_RX_UNKNOWN;
1289         }
1290
1291         sm->radius_identifier = -1;
1292         wpa_printf(MSG_DEBUG, "RADIUS packet matching with station " MACSTR,
1293                    MAC2STR(sta->addr));
1294
1295         radius_msg_free(sm->last_recv_radius);
1296         sm->last_recv_radius = msg;
1297
1298         session_timeout_set =
1299                 !radius_msg_get_attr_int32(msg, RADIUS_ATTR_SESSION_TIMEOUT,
1300                                            &session_timeout);
1301         if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_TERMINATION_ACTION,
1302                                       &termination_action))
1303                 termination_action = RADIUS_TERMINATION_ACTION_DEFAULT;
1304
1305         if (hapd->conf->acct_interim_interval == 0 &&
1306             hdr->code == RADIUS_CODE_ACCESS_ACCEPT &&
1307             radius_msg_get_attr_int32(msg, RADIUS_ATTR_ACCT_INTERIM_INTERVAL,
1308                                       &acct_interim_interval) == 0) {
1309                 if (acct_interim_interval < 60) {
1310                         hostapd_logger(hapd, sta->addr,
1311                                        HOSTAPD_MODULE_IEEE8021X,
1312                                        HOSTAPD_LEVEL_INFO,
1313                                        "ignored too small "
1314                                        "Acct-Interim-Interval %d",
1315                                        acct_interim_interval);
1316                 } else
1317                         sta->acct_interim_interval = acct_interim_interval;
1318         }
1319
1320
1321         switch (hdr->code) {
1322         case RADIUS_CODE_ACCESS_ACCEPT:
1323                 if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
1324                         sta->vlan_id = 0;
1325 #ifndef CONFIG_NO_VLAN
1326                 else {
1327                         old_vlanid = sta->vlan_id;
1328                         sta->vlan_id = radius_msg_get_vlanid(msg);
1329                 }
1330                 if (sta->vlan_id > 0 &&
1331                     hostapd_vlan_id_valid(hapd->conf->vlan, sta->vlan_id)) {
1332                         hostapd_logger(hapd, sta->addr,
1333                                        HOSTAPD_MODULE_RADIUS,
1334                                        HOSTAPD_LEVEL_INFO,
1335                                        "VLAN ID %d", sta->vlan_id);
1336                 } else if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_REQUIRED) {
1337                         sta->eapol_sm->authFail = TRUE;
1338                         hostapd_logger(hapd, sta->addr,
1339                                        HOSTAPD_MODULE_IEEE8021X,
1340                                        HOSTAPD_LEVEL_INFO, "authentication "
1341                                        "server did not include required VLAN "
1342                                        "ID in Access-Accept");
1343                         break;
1344                 }
1345 #endif /* CONFIG_NO_VLAN */
1346
1347                 if (ap_sta_bind_vlan(hapd, sta, old_vlanid) < 0)
1348                         break;
1349
1350                 /* RFC 3580, Ch. 3.17 */
1351                 if (session_timeout_set && termination_action ==
1352                     RADIUS_TERMINATION_ACTION_RADIUS_REQUEST) {
1353                         sm->reAuthPeriod = session_timeout;
1354                 } else if (session_timeout_set)
1355                         ap_sta_session_timeout(hapd, sta, session_timeout);
1356
1357                 sm->eap_if->aaaSuccess = TRUE;
1358                 override_eapReq = 1;
1359                 ieee802_1x_get_keys(hapd, sta, msg, req, shared_secret,
1360                                     shared_secret_len);
1361                 ieee802_1x_store_radius_class(hapd, sta, msg);
1362                 ieee802_1x_update_sta_identity(hapd, sta, msg);
1363                 ieee802_1x_update_sta_cui(hapd, sta, msg);
1364                 if (sm->eap_if->eapKeyAvailable &&
1365                     wpa_auth_pmksa_add(sta->wpa_sm, sm->eapol_key_crypt,
1366                                        session_timeout_set ?
1367                                        (int) session_timeout : -1, sm) == 0) {
1368                         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
1369                                        HOSTAPD_LEVEL_DEBUG,
1370                                        "Added PMKSA cache entry");
1371                 }
1372                 break;
1373         case RADIUS_CODE_ACCESS_REJECT:
1374                 sm->eap_if->aaaFail = TRUE;
1375                 override_eapReq = 1;
1376                 break;
1377         case RADIUS_CODE_ACCESS_CHALLENGE:
1378                 sm->eap_if->aaaEapReq = TRUE;
1379                 if (session_timeout_set) {
1380                         /* RFC 2869, Ch. 2.3.2; RFC 3580, Ch. 3.17 */
1381                         sm->eap_if->aaaMethodTimeout = session_timeout;
1382                         hostapd_logger(hapd, sm->addr,
1383                                        HOSTAPD_MODULE_IEEE8021X,
1384                                        HOSTAPD_LEVEL_DEBUG,
1385                                        "using EAP timeout of %d seconds (from "
1386                                        "RADIUS)",
1387                                        sm->eap_if->aaaMethodTimeout);
1388                 } else {
1389                         /*
1390                          * Use dynamic retransmission behavior per EAP
1391                          * specification.
1392                          */
1393                         sm->eap_if->aaaMethodTimeout = 0;
1394                 }
1395                 break;
1396         }
1397
1398         ieee802_1x_decapsulate_radius(hapd, sta);
1399         if (override_eapReq)
1400                 sm->eap_if->aaaEapReq = FALSE;
1401
1402         eapol_auth_step(sm);
1403
1404         return RADIUS_RX_QUEUED;
1405 }
1406 #endif /* CONFIG_NO_RADIUS */
1407
1408
1409 void ieee802_1x_abort_auth(struct hostapd_data *hapd, struct sta_info *sta)
1410 {
1411         struct eapol_state_machine *sm = sta->eapol_sm;
1412         if (sm == NULL)
1413                 return;
1414
1415         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1416                        HOSTAPD_LEVEL_DEBUG, "aborting authentication");
1417
1418 #ifndef CONFIG_NO_RADIUS
1419         radius_msg_free(sm->last_recv_radius);
1420         sm->last_recv_radius = NULL;
1421 #endif /* CONFIG_NO_RADIUS */
1422
1423         if (sm->eap_if->eapTimeout) {
1424                 /*
1425                  * Disconnect the STA since it did not reply to the last EAP
1426                  * request and we cannot continue EAP processing (EAP-Failure
1427                  * could only be sent if the EAP peer actually replied).
1428                  */
1429                 wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "EAP Timeout, STA " MACSTR,
1430                         MAC2STR(sta->addr));
1431
1432                 sm->eap_if->portEnabled = FALSE;
1433                 ap_sta_disconnect(hapd, sta, sta->addr,
1434                                   WLAN_REASON_PREV_AUTH_NOT_VALID);
1435         }
1436 }
1437
1438
1439 static int ieee802_1x_rekey_broadcast(struct hostapd_data *hapd)
1440 {
1441         struct eapol_authenticator *eapol = hapd->eapol_auth;
1442
1443         if (hapd->conf->default_wep_key_len < 1)
1444                 return 0;
1445
1446         os_free(eapol->default_wep_key);
1447         eapol->default_wep_key = os_malloc(hapd->conf->default_wep_key_len);
1448         if (eapol->default_wep_key == NULL ||
1449             random_get_bytes(eapol->default_wep_key,
1450                              hapd->conf->default_wep_key_len)) {
1451                 wpa_printf(MSG_INFO, "Could not generate random WEP key");
1452                 os_free(eapol->default_wep_key);
1453                 eapol->default_wep_key = NULL;
1454                 return -1;
1455         }
1456
1457         wpa_hexdump_key(MSG_DEBUG, "IEEE 802.1X: New default WEP key",
1458                         eapol->default_wep_key,
1459                         hapd->conf->default_wep_key_len);
1460
1461         return 0;
1462 }
1463
1464
1465 static int ieee802_1x_sta_key_available(struct hostapd_data *hapd,
1466                                         struct sta_info *sta, void *ctx)
1467 {
1468         if (sta->eapol_sm) {
1469                 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
1470                 eapol_auth_step(sta->eapol_sm);
1471         }
1472         return 0;
1473 }
1474
1475
1476 static void ieee802_1x_rekey(void *eloop_ctx, void *timeout_ctx)
1477 {
1478         struct hostapd_data *hapd = eloop_ctx;
1479         struct eapol_authenticator *eapol = hapd->eapol_auth;
1480
1481         if (eapol->default_wep_key_idx >= 3)
1482                 eapol->default_wep_key_idx =
1483                         hapd->conf->individual_wep_key_len > 0 ? 1 : 0;
1484         else
1485                 eapol->default_wep_key_idx++;
1486
1487         wpa_printf(MSG_DEBUG, "IEEE 802.1X: New default WEP key index %d",
1488                    eapol->default_wep_key_idx);
1489
1490         if (ieee802_1x_rekey_broadcast(hapd)) {
1491                 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1492                                HOSTAPD_LEVEL_WARNING, "failed to generate a "
1493                                "new broadcast key");
1494                 os_free(eapol->default_wep_key);
1495                 eapol->default_wep_key = NULL;
1496                 return;
1497         }
1498
1499         /* TODO: Could setup key for RX here, but change default TX keyid only
1500          * after new broadcast key has been sent to all stations. */
1501         if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
1502                                 broadcast_ether_addr,
1503                                 eapol->default_wep_key_idx, 1, NULL, 0,
1504                                 eapol->default_wep_key,
1505                                 hapd->conf->default_wep_key_len)) {
1506                 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1507                                HOSTAPD_LEVEL_WARNING, "failed to configure a "
1508                                "new broadcast key");
1509                 os_free(eapol->default_wep_key);
1510                 eapol->default_wep_key = NULL;
1511                 return;
1512         }
1513
1514         ap_for_each_sta(hapd, ieee802_1x_sta_key_available, NULL);
1515
1516         if (hapd->conf->wep_rekeying_period > 0) {
1517                 eloop_register_timeout(hapd->conf->wep_rekeying_period, 0,
1518                                        ieee802_1x_rekey, hapd, NULL);
1519         }
1520 }
1521
1522
1523 static void ieee802_1x_eapol_send(void *ctx, void *sta_ctx, u8 type,
1524                                   const u8 *data, size_t datalen)
1525 {
1526 #ifdef CONFIG_WPS
1527         struct sta_info *sta = sta_ctx;
1528
1529         if ((sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) ==
1530             WLAN_STA_MAYBE_WPS) {
1531                 const u8 *identity;
1532                 size_t identity_len;
1533                 struct eapol_state_machine *sm = sta->eapol_sm;
1534
1535                 identity = eap_get_identity(sm->eap, &identity_len);
1536                 if (identity &&
1537                     ((identity_len == WSC_ID_ENROLLEE_LEN &&
1538                       os_memcmp(identity, WSC_ID_ENROLLEE,
1539                                 WSC_ID_ENROLLEE_LEN) == 0) ||
1540                      (identity_len == WSC_ID_REGISTRAR_LEN &&
1541                       os_memcmp(identity, WSC_ID_REGISTRAR,
1542                                 WSC_ID_REGISTRAR_LEN) == 0))) {
1543                         wpa_printf(MSG_DEBUG, "WPS: WLAN_STA_MAYBE_WPS -> "
1544                                    "WLAN_STA_WPS");
1545                         sta->flags |= WLAN_STA_WPS;
1546                 }
1547         }
1548 #endif /* CONFIG_WPS */
1549
1550         ieee802_1x_send(ctx, sta_ctx, type, data, datalen);
1551 }
1552
1553
1554 static void ieee802_1x_aaa_send(void *ctx, void *sta_ctx,
1555                                 const u8 *data, size_t datalen)
1556 {
1557 #ifndef CONFIG_NO_RADIUS
1558         struct hostapd_data *hapd = ctx;
1559         struct sta_info *sta = sta_ctx;
1560
1561         ieee802_1x_encapsulate_radius(hapd, sta, data, datalen);
1562 #endif /* CONFIG_NO_RADIUS */
1563 }
1564
1565
1566 static void _ieee802_1x_finished(void *ctx, void *sta_ctx, int success,
1567                                  int preauth)
1568 {
1569         struct hostapd_data *hapd = ctx;
1570         struct sta_info *sta = sta_ctx;
1571         if (preauth)
1572                 rsn_preauth_finished(hapd, sta, success);
1573         else
1574                 ieee802_1x_finished(hapd, sta, success);
1575 }
1576
1577
1578 static int ieee802_1x_get_eap_user(void *ctx, const u8 *identity,
1579                                    size_t identity_len, int phase2,
1580                                    struct eap_user *user)
1581 {
1582         struct hostapd_data *hapd = ctx;
1583         const struct hostapd_eap_user *eap_user;
1584         int i;
1585
1586         eap_user = hostapd_get_eap_user(hapd, identity, identity_len, phase2);
1587         if (eap_user == NULL)
1588                 return -1;
1589
1590         os_memset(user, 0, sizeof(*user));
1591         user->phase2 = phase2;
1592         for (i = 0; i < EAP_MAX_METHODS; i++) {
1593                 user->methods[i].vendor = eap_user->methods[i].vendor;
1594                 user->methods[i].method = eap_user->methods[i].method;
1595         }
1596
1597         if (eap_user->password) {
1598                 user->password = os_malloc(eap_user->password_len);
1599                 if (user->password == NULL)
1600                         return -1;
1601                 os_memcpy(user->password, eap_user->password,
1602                           eap_user->password_len);
1603                 user->password_len = eap_user->password_len;
1604                 user->password_hash = eap_user->password_hash;
1605         }
1606         user->force_version = eap_user->force_version;
1607         user->ttls_auth = eap_user->ttls_auth;
1608
1609         return 0;
1610 }
1611
1612
1613 static int ieee802_1x_sta_entry_alive(void *ctx, const u8 *addr)
1614 {
1615         struct hostapd_data *hapd = ctx;
1616         struct sta_info *sta;
1617         sta = ap_get_sta(hapd, addr);
1618         if (sta == NULL || sta->eapol_sm == NULL)
1619                 return 0;
1620         return 1;
1621 }
1622
1623
1624 static void ieee802_1x_logger(void *ctx, const u8 *addr,
1625                               eapol_logger_level level, const char *txt)
1626 {
1627 #ifndef CONFIG_NO_HOSTAPD_LOGGER
1628         struct hostapd_data *hapd = ctx;
1629         int hlevel;
1630
1631         switch (level) {
1632         case EAPOL_LOGGER_WARNING:
1633                 hlevel = HOSTAPD_LEVEL_WARNING;
1634                 break;
1635         case EAPOL_LOGGER_INFO:
1636                 hlevel = HOSTAPD_LEVEL_INFO;
1637                 break;
1638         case EAPOL_LOGGER_DEBUG:
1639         default:
1640                 hlevel = HOSTAPD_LEVEL_DEBUG;
1641                 break;
1642         }
1643
1644         hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE8021X, hlevel, "%s",
1645                        txt);
1646 #endif /* CONFIG_NO_HOSTAPD_LOGGER */
1647 }
1648
1649
1650 static void ieee802_1x_set_port_authorized(void *ctx, void *sta_ctx,
1651                                            int authorized)
1652 {
1653         struct hostapd_data *hapd = ctx;
1654         struct sta_info *sta = sta_ctx;
1655         ieee802_1x_set_sta_authorized(hapd, sta, authorized);
1656 }
1657
1658
1659 static void _ieee802_1x_abort_auth(void *ctx, void *sta_ctx)
1660 {
1661         struct hostapd_data *hapd = ctx;
1662         struct sta_info *sta = sta_ctx;
1663         ieee802_1x_abort_auth(hapd, sta);
1664 }
1665
1666
1667 static void _ieee802_1x_tx_key(void *ctx, void *sta_ctx)
1668 {
1669         struct hostapd_data *hapd = ctx;
1670         struct sta_info *sta = sta_ctx;
1671         ieee802_1x_tx_key(hapd, sta);
1672 }
1673
1674
1675 static void ieee802_1x_eapol_event(void *ctx, void *sta_ctx,
1676                                    enum eapol_event type)
1677 {
1678         /* struct hostapd_data *hapd = ctx; */
1679         struct sta_info *sta = sta_ctx;
1680         switch (type) {
1681         case EAPOL_AUTH_SM_CHANGE:
1682                 wpa_auth_sm_notify(sta->wpa_sm);
1683                 break;
1684         case EAPOL_AUTH_REAUTHENTICATE:
1685                 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
1686                 break;
1687         }
1688 }
1689
1690
1691 int ieee802_1x_init(struct hostapd_data *hapd)
1692 {
1693         int i;
1694         struct eapol_auth_config conf;
1695         struct eapol_auth_cb cb;
1696
1697         os_memset(&conf, 0, sizeof(conf));
1698         conf.ctx = hapd;
1699         conf.eap_reauth_period = hapd->conf->eap_reauth_period;
1700         conf.wpa = hapd->conf->wpa;
1701         conf.individual_wep_key_len = hapd->conf->individual_wep_key_len;
1702         conf.eap_server = hapd->conf->eap_server;
1703         conf.ssl_ctx = hapd->ssl_ctx;
1704         conf.msg_ctx = hapd->msg_ctx;
1705         conf.eap_sim_db_priv = hapd->eap_sim_db_priv;
1706         conf.eap_req_id_text = hapd->conf->eap_req_id_text;
1707         conf.eap_req_id_text_len = hapd->conf->eap_req_id_text_len;
1708         conf.pac_opaque_encr_key = hapd->conf->pac_opaque_encr_key;
1709         conf.eap_fast_a_id = hapd->conf->eap_fast_a_id;
1710         conf.eap_fast_a_id_len = hapd->conf->eap_fast_a_id_len;
1711         conf.eap_fast_a_id_info = hapd->conf->eap_fast_a_id_info;
1712         conf.eap_fast_prov = hapd->conf->eap_fast_prov;
1713         conf.pac_key_lifetime = hapd->conf->pac_key_lifetime;
1714         conf.pac_key_refresh_time = hapd->conf->pac_key_refresh_time;
1715         conf.eap_sim_aka_result_ind = hapd->conf->eap_sim_aka_result_ind;
1716         conf.tnc = hapd->conf->tnc;
1717         conf.wps = hapd->wps;
1718         conf.fragment_size = hapd->conf->fragment_size;
1719         conf.pwd_group = hapd->conf->pwd_group;
1720         conf.pbc_in_m1 = hapd->conf->pbc_in_m1;
1721         if (hapd->conf->server_id) {
1722                 conf.server_id = (const u8 *) hapd->conf->server_id;
1723                 conf.server_id_len = os_strlen(hapd->conf->server_id);
1724         } else {
1725                 conf.server_id = (const u8 *) "hostapd";
1726                 conf.server_id_len = 7;
1727         }
1728
1729         os_memset(&cb, 0, sizeof(cb));
1730         cb.eapol_send = ieee802_1x_eapol_send;
1731         cb.aaa_send = ieee802_1x_aaa_send;
1732         cb.finished = _ieee802_1x_finished;
1733         cb.get_eap_user = ieee802_1x_get_eap_user;
1734         cb.sta_entry_alive = ieee802_1x_sta_entry_alive;
1735         cb.logger = ieee802_1x_logger;
1736         cb.set_port_authorized = ieee802_1x_set_port_authorized;
1737         cb.abort_auth = _ieee802_1x_abort_auth;
1738         cb.tx_key = _ieee802_1x_tx_key;
1739         cb.eapol_event = ieee802_1x_eapol_event;
1740
1741         hapd->eapol_auth = eapol_auth_init(&conf, &cb);
1742         if (hapd->eapol_auth == NULL)
1743                 return -1;
1744
1745         if ((hapd->conf->ieee802_1x || hapd->conf->wpa) &&
1746             hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 1))
1747                 return -1;
1748
1749 #ifndef CONFIG_NO_RADIUS
1750         if (radius_client_register(hapd->radius, RADIUS_AUTH,
1751                                    ieee802_1x_receive_auth, hapd))
1752                 return -1;
1753 #endif /* CONFIG_NO_RADIUS */
1754
1755         if (hapd->conf->default_wep_key_len) {
1756                 for (i = 0; i < 4; i++)
1757                         hostapd_drv_set_key(hapd->conf->iface, hapd,
1758                                             WPA_ALG_NONE, NULL, i, 0, NULL, 0,
1759                                             NULL, 0);
1760
1761                 ieee802_1x_rekey(hapd, NULL);
1762
1763                 if (hapd->eapol_auth->default_wep_key == NULL)
1764                         return -1;
1765         }
1766
1767         return 0;
1768 }
1769
1770
1771 void ieee802_1x_deinit(struct hostapd_data *hapd)
1772 {
1773         eloop_cancel_timeout(ieee802_1x_rekey, hapd, NULL);
1774
1775         if (hapd->driver != NULL &&
1776             (hapd->conf->ieee802_1x || hapd->conf->wpa))
1777                 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0);
1778
1779         eapol_auth_deinit(hapd->eapol_auth);
1780         hapd->eapol_auth = NULL;
1781 }
1782
1783
1784 int ieee802_1x_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
1785                          const u8 *buf, size_t len, int ack)
1786 {
1787         struct ieee80211_hdr *hdr;
1788         u8 *pos;
1789         const unsigned char rfc1042_hdr[ETH_ALEN] =
1790                 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
1791
1792         if (sta == NULL)
1793                 return -1;
1794         if (len < sizeof(*hdr) + sizeof(rfc1042_hdr) + 2)
1795                 return 0;
1796
1797         hdr = (struct ieee80211_hdr *) buf;
1798         pos = (u8 *) (hdr + 1);
1799         if (os_memcmp(pos, rfc1042_hdr, sizeof(rfc1042_hdr)) != 0)
1800                 return 0;
1801         pos += sizeof(rfc1042_hdr);
1802         if (WPA_GET_BE16(pos) != ETH_P_PAE)
1803                 return 0;
1804         pos += 2;
1805
1806         return ieee802_1x_eapol_tx_status(hapd, sta, pos, buf + len - pos,
1807                                           ack);
1808 }
1809
1810
1811 int ieee802_1x_eapol_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
1812                                const u8 *buf, int len, int ack)
1813 {
1814         const struct ieee802_1x_hdr *xhdr =
1815                 (const struct ieee802_1x_hdr *) buf;
1816         const u8 *pos = buf + sizeof(*xhdr);
1817         struct ieee802_1x_eapol_key *key;
1818
1819         if (len < (int) sizeof(*xhdr))
1820                 return 0;
1821         wpa_printf(MSG_DEBUG, "IEEE 802.1X: " MACSTR " TX status - version=%d "
1822                    "type=%d length=%d - ack=%d",
1823                    MAC2STR(sta->addr), xhdr->version, xhdr->type,
1824                    be_to_host16(xhdr->length), ack);
1825
1826         if (xhdr->type != IEEE802_1X_TYPE_EAPOL_KEY)
1827                 return 0;
1828
1829         if (pos + sizeof(struct wpa_eapol_key) <= buf + len) {
1830                 const struct wpa_eapol_key *wpa;
1831                 wpa = (const struct wpa_eapol_key *) pos;
1832                 if (wpa->type == EAPOL_KEY_TYPE_RSN ||
1833                     wpa->type == EAPOL_KEY_TYPE_WPA)
1834                         wpa_auth_eapol_key_tx_status(hapd->wpa_auth,
1835                                                      sta->wpa_sm, ack);
1836         }
1837
1838         /* EAPOL EAP-Packet packets are eventually re-sent by either Supplicant
1839          * or Authenticator state machines, but EAPOL-Key packets are not
1840          * retransmitted in case of failure. Try to re-send failed EAPOL-Key
1841          * packets couple of times because otherwise STA keys become
1842          * unsynchronized with AP. */
1843         if (!ack && pos + sizeof(*key) <= buf + len) {
1844                 key = (struct ieee802_1x_eapol_key *) pos;
1845                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1846                                HOSTAPD_LEVEL_DEBUG, "did not Ack EAPOL-Key "
1847                                "frame (%scast index=%d)",
1848                                key->key_index & BIT(7) ? "uni" : "broad",
1849                                key->key_index & ~BIT(7));
1850                 /* TODO: re-send EAPOL-Key couple of times (with short delay
1851                  * between them?). If all attempt fail, report error and
1852                  * deauthenticate STA so that it will get new keys when
1853                  * authenticating again (e.g., after returning in range).
1854                  * Separate limit/transmit state needed both for unicast and
1855                  * broadcast keys(?) */
1856         }
1857         /* TODO: could move unicast key configuration from ieee802_1x_tx_key()
1858          * to here and change the key only if the EAPOL-Key packet was Acked.
1859          */
1860
1861         return 1;
1862 }
1863
1864
1865 u8 * ieee802_1x_get_identity(struct eapol_state_machine *sm, size_t *len)
1866 {
1867         if (sm == NULL || sm->identity == NULL)
1868                 return NULL;
1869
1870         *len = sm->identity_len;
1871         return sm->identity;
1872 }
1873
1874
1875 u8 * ieee802_1x_get_radius_class(struct eapol_state_machine *sm, size_t *len,
1876                                  int idx)
1877 {
1878         if (sm == NULL || sm->radius_class.attr == NULL ||
1879             idx >= (int) sm->radius_class.count)
1880                 return NULL;
1881
1882         *len = sm->radius_class.attr[idx].len;
1883         return sm->radius_class.attr[idx].data;
1884 }
1885
1886
1887 struct wpabuf * ieee802_1x_get_radius_cui(struct eapol_state_machine *sm)
1888 {
1889         if (sm == NULL)
1890                 return NULL;
1891         return sm->radius_cui;
1892 }
1893
1894
1895 const u8 * ieee802_1x_get_key(struct eapol_state_machine *sm, size_t *len)
1896 {
1897         *len = 0;
1898         if (sm == NULL)
1899                 return NULL;
1900
1901         *len = sm->eap_if->eapKeyDataLen;
1902         return sm->eap_if->eapKeyData;
1903 }
1904
1905
1906 void ieee802_1x_notify_port_enabled(struct eapol_state_machine *sm,
1907                                     int enabled)
1908 {
1909         if (sm == NULL)
1910                 return;
1911         sm->eap_if->portEnabled = enabled ? TRUE : FALSE;
1912         eapol_auth_step(sm);
1913 }
1914
1915
1916 void ieee802_1x_notify_port_valid(struct eapol_state_machine *sm,
1917                                   int valid)
1918 {
1919         if (sm == NULL)
1920                 return;
1921         sm->portValid = valid ? TRUE : FALSE;
1922         eapol_auth_step(sm);
1923 }
1924
1925
1926 void ieee802_1x_notify_pre_auth(struct eapol_state_machine *sm, int pre_auth)
1927 {
1928         if (sm == NULL)
1929                 return;
1930         if (pre_auth)
1931                 sm->flags |= EAPOL_SM_PREAUTH;
1932         else
1933                 sm->flags &= ~EAPOL_SM_PREAUTH;
1934 }
1935
1936
1937 static const char * bool_txt(Boolean bool)
1938 {
1939         return bool ? "TRUE" : "FALSE";
1940 }
1941
1942
1943 int ieee802_1x_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
1944 {
1945         /* TODO */
1946         return 0;
1947 }
1948
1949
1950 int ieee802_1x_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
1951                            char *buf, size_t buflen)
1952 {
1953         int len = 0, ret;
1954         struct eapol_state_machine *sm = sta->eapol_sm;
1955         struct os_reltime diff;
1956
1957         if (sm == NULL)
1958                 return 0;
1959
1960         ret = os_snprintf(buf + len, buflen - len,
1961                           "dot1xPaePortNumber=%d\n"
1962                           "dot1xPaePortProtocolVersion=%d\n"
1963                           "dot1xPaePortCapabilities=1\n"
1964                           "dot1xPaePortInitialize=%d\n"
1965                           "dot1xPaePortReauthenticate=FALSE\n",
1966                           sta->aid,
1967                           EAPOL_VERSION,
1968                           sm->initialize);
1969         if (ret < 0 || (size_t) ret >= buflen - len)
1970                 return len;
1971         len += ret;
1972
1973         /* dot1xAuthConfigTable */
1974         ret = os_snprintf(buf + len, buflen - len,
1975                           "dot1xAuthPaeState=%d\n"
1976                           "dot1xAuthBackendAuthState=%d\n"
1977                           "dot1xAuthAdminControlledDirections=%d\n"
1978                           "dot1xAuthOperControlledDirections=%d\n"
1979                           "dot1xAuthAuthControlledPortStatus=%d\n"
1980                           "dot1xAuthAuthControlledPortControl=%d\n"
1981                           "dot1xAuthQuietPeriod=%u\n"
1982                           "dot1xAuthServerTimeout=%u\n"
1983                           "dot1xAuthReAuthPeriod=%u\n"
1984                           "dot1xAuthReAuthEnabled=%s\n"
1985                           "dot1xAuthKeyTxEnabled=%s\n",
1986                           sm->auth_pae_state + 1,
1987                           sm->be_auth_state + 1,
1988                           sm->adminControlledDirections,
1989                           sm->operControlledDirections,
1990                           sm->authPortStatus,
1991                           sm->portControl,
1992                           sm->quietPeriod,
1993                           sm->serverTimeout,
1994                           sm->reAuthPeriod,
1995                           bool_txt(sm->reAuthEnabled),
1996                           bool_txt(sm->keyTxEnabled));
1997         if (ret < 0 || (size_t) ret >= buflen - len)
1998                 return len;
1999         len += ret;
2000
2001         /* dot1xAuthStatsTable */
2002         ret = os_snprintf(buf + len, buflen - len,
2003                           "dot1xAuthEapolFramesRx=%u\n"
2004                           "dot1xAuthEapolFramesTx=%u\n"
2005                           "dot1xAuthEapolStartFramesRx=%u\n"
2006                           "dot1xAuthEapolLogoffFramesRx=%u\n"
2007                           "dot1xAuthEapolRespIdFramesRx=%u\n"
2008                           "dot1xAuthEapolRespFramesRx=%u\n"
2009                           "dot1xAuthEapolReqIdFramesTx=%u\n"
2010                           "dot1xAuthEapolReqFramesTx=%u\n"
2011                           "dot1xAuthInvalidEapolFramesRx=%u\n"
2012                           "dot1xAuthEapLengthErrorFramesRx=%u\n"
2013                           "dot1xAuthLastEapolFrameVersion=%u\n"
2014                           "dot1xAuthLastEapolFrameSource=" MACSTR "\n",
2015                           sm->dot1xAuthEapolFramesRx,
2016                           sm->dot1xAuthEapolFramesTx,
2017                           sm->dot1xAuthEapolStartFramesRx,
2018                           sm->dot1xAuthEapolLogoffFramesRx,
2019                           sm->dot1xAuthEapolRespIdFramesRx,
2020                           sm->dot1xAuthEapolRespFramesRx,
2021                           sm->dot1xAuthEapolReqIdFramesTx,
2022                           sm->dot1xAuthEapolReqFramesTx,
2023                           sm->dot1xAuthInvalidEapolFramesRx,
2024                           sm->dot1xAuthEapLengthErrorFramesRx,
2025                           sm->dot1xAuthLastEapolFrameVersion,
2026                           MAC2STR(sm->addr));
2027         if (ret < 0 || (size_t) ret >= buflen - len)
2028                 return len;
2029         len += ret;
2030
2031         /* dot1xAuthDiagTable */
2032         ret = os_snprintf(buf + len, buflen - len,
2033                           "dot1xAuthEntersConnecting=%u\n"
2034                           "dot1xAuthEapLogoffsWhileConnecting=%u\n"
2035                           "dot1xAuthEntersAuthenticating=%u\n"
2036                           "dot1xAuthAuthSuccessesWhileAuthenticating=%u\n"
2037                           "dot1xAuthAuthTimeoutsWhileAuthenticating=%u\n"
2038                           "dot1xAuthAuthFailWhileAuthenticating=%u\n"
2039                           "dot1xAuthAuthEapStartsWhileAuthenticating=%u\n"
2040                           "dot1xAuthAuthEapLogoffWhileAuthenticating=%u\n"
2041                           "dot1xAuthAuthReauthsWhileAuthenticated=%u\n"
2042                           "dot1xAuthAuthEapStartsWhileAuthenticated=%u\n"
2043                           "dot1xAuthAuthEapLogoffWhileAuthenticated=%u\n"
2044                           "dot1xAuthBackendResponses=%u\n"
2045                           "dot1xAuthBackendAccessChallenges=%u\n"
2046                           "dot1xAuthBackendOtherRequestsToSupplicant=%u\n"
2047                           "dot1xAuthBackendAuthSuccesses=%u\n"
2048                           "dot1xAuthBackendAuthFails=%u\n",
2049                           sm->authEntersConnecting,
2050                           sm->authEapLogoffsWhileConnecting,
2051                           sm->authEntersAuthenticating,
2052                           sm->authAuthSuccessesWhileAuthenticating,
2053                           sm->authAuthTimeoutsWhileAuthenticating,
2054                           sm->authAuthFailWhileAuthenticating,
2055                           sm->authAuthEapStartsWhileAuthenticating,
2056                           sm->authAuthEapLogoffWhileAuthenticating,
2057                           sm->authAuthReauthsWhileAuthenticated,
2058                           sm->authAuthEapStartsWhileAuthenticated,
2059                           sm->authAuthEapLogoffWhileAuthenticated,
2060                           sm->backendResponses,
2061                           sm->backendAccessChallenges,
2062                           sm->backendOtherRequestsToSupplicant,
2063                           sm->backendAuthSuccesses,
2064                           sm->backendAuthFails);
2065         if (ret < 0 || (size_t) ret >= buflen - len)
2066                 return len;
2067         len += ret;
2068
2069         /* dot1xAuthSessionStatsTable */
2070         os_reltime_age(&sta->acct_session_start, &diff);
2071         ret = os_snprintf(buf + len, buflen - len,
2072                           /* TODO: dot1xAuthSessionOctetsRx */
2073                           /* TODO: dot1xAuthSessionOctetsTx */
2074                           /* TODO: dot1xAuthSessionFramesRx */
2075                           /* TODO: dot1xAuthSessionFramesTx */
2076                           "dot1xAuthSessionId=%08X-%08X\n"
2077                           "dot1xAuthSessionAuthenticMethod=%d\n"
2078                           "dot1xAuthSessionTime=%u\n"
2079                           "dot1xAuthSessionTerminateCause=999\n"
2080                           "dot1xAuthSessionUserName=%s\n",
2081                           sta->acct_session_id_hi, sta->acct_session_id_lo,
2082                           (wpa_key_mgmt_wpa_ieee8021x(
2083                                    wpa_auth_sta_key_mgmt(sta->wpa_sm))) ?
2084                           1 : 2,
2085                           (unsigned int) diff.sec,
2086                           sm->identity);
2087         if (ret < 0 || (size_t) ret >= buflen - len)
2088                 return len;
2089         len += ret;
2090
2091         ret = os_snprintf(buf + len, buflen - len,
2092                           "last_eap_type_as=%d (%s)\n"
2093                           "last_eap_type_sta=%d (%s)\n",
2094                           sm->eap_type_authsrv,
2095                           eap_server_get_name(0, sm->eap_type_authsrv),
2096                           sm->eap_type_supp,
2097                           eap_server_get_name(0, sm->eap_type_supp));
2098         if (ret < 0 || (size_t) ret >= buflen - len)
2099                 return len;
2100         len += ret;
2101
2102         return len;
2103 }
2104
2105
2106 static void ieee802_1x_finished(struct hostapd_data *hapd,
2107                                 struct sta_info *sta, int success)
2108 {
2109         const u8 *key;
2110         size_t len;
2111         /* TODO: get PMKLifetime from WPA parameters */
2112         static const int dot11RSNAConfigPMKLifetime = 43200;
2113
2114         key = ieee802_1x_get_key(sta->eapol_sm, &len);
2115         if (success && key && len >= PMK_LEN &&
2116             wpa_auth_pmksa_add(sta->wpa_sm, key, dot11RSNAConfigPMKLifetime,
2117                                sta->eapol_sm) == 0) {
2118                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
2119                                HOSTAPD_LEVEL_DEBUG,
2120                                "Added PMKSA cache entry (IEEE 802.1X)");
2121         }
2122
2123         if (!success) {
2124                 /*
2125                  * Many devices require deauthentication after WPS provisioning
2126                  * and some may not be be able to do that themselves, so
2127                  * disconnect the client here. In addition, this may also
2128                  * benefit IEEE 802.1X/EAPOL authentication cases, too since
2129                  * the EAPOL PAE state machine would remain in HELD state for
2130                  * considerable amount of time and some EAP methods, like
2131                  * EAP-FAST with anonymous provisioning, may require another
2132                  * EAPOL authentication to be started to complete connection.
2133                  */
2134                 wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "IEEE 802.1X: Force "
2135                         "disconnection after EAP-Failure");
2136                 /* Add a small sleep to increase likelihood of previously
2137                  * requested EAP-Failure TX getting out before this should the
2138                  * driver reorder operations.
2139                  */
2140                 os_sleep(0, 10000);
2141                 ap_sta_disconnect(hapd, sta, sta->addr,
2142                                   WLAN_REASON_IEEE_802_1X_AUTH_FAILED);
2143                 hostapd_wps_eap_completed(hapd);
2144         }
2145 }