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 "hs20.h"
  34 #include "ieee802_1x.h"
  35
  36
  37 #ifdef CONFIG_HS20
  38 static void ieee802_1x_wnm_notif_send(void *eloop_ctx, void *timeout_ctx);
  39 #endif /* CONFIG_HS20 */
  40 static void ieee802_1x_finished(struct hostapd_data *hapd,
  41                                 struct sta_info *sta, int success,
  42                                 int remediation);
  43
  44
  45 static void ieee802_1x_send(struct hostapd_data *hapd, struct sta_info *sta,
  46                             u8 type, const u8 *data, size_t datalen)
  47 {
  48         u8 *buf;
  49         struct ieee802_1x_hdr *xhdr;
  50         size_t len;
  51         int encrypt = 0;
  52
  53         len = sizeof(*xhdr) + datalen;
  54         buf = os_zalloc(len);
  55         if (buf == NULL) {
  56                 wpa_printf(MSG_ERROR, "malloc() failed for "
  57                            "ieee802_1x_send(len=%lu)",
  58                            (unsigned long) len);
  59                 return;
  60         }
  61
  62         xhdr = (struct ieee802_1x_hdr *) buf;
  63         xhdr->version = hapd->conf->eapol_version;
  64         xhdr->type = type;
  65         xhdr->length = host_to_be16(datalen);
  66
  67         if (datalen > 0 && data != NULL)
  68                 os_memcpy(xhdr + 1, data, datalen);
  69
  70         if (wpa_auth_pairwise_set(sta->wpa_sm))
  71                 encrypt = 1;
  72 #ifdef CONFIG_TESTING_OPTIONS
  73         if (hapd->ext_eapol_frame_io) {
  74                 size_t hex_len = 2 * len + 1;
  75                 char *hex = os_malloc(hex_len);
  76
  77                 if (hex) {
  78                         wpa_snprintf_hex(hex, hex_len, buf, len);
  79                         wpa_msg(hapd->msg_ctx, MSG_INFO,
  80                                 "EAPOL-TX " MACSTR " %s",
  81                                 MAC2STR(sta->addr), hex);
  82                         os_free(hex);
  83                 }
  84         } else
  85 #endif /* CONFIG_TESTING_OPTIONS */
  86         if (sta->flags & WLAN_STA_PREAUTH) {
  87                 rsn_preauth_send(hapd, sta, buf, len);
  88         } else {
  89                 hostapd_drv_hapd_send_eapol(
  90                         hapd, sta->addr, buf, len,
  91                         encrypt, hostapd_sta_flags_to_drv(sta->flags));
  92         }
  93
  94         os_free(buf);
  95 }
  96
  97
  98 void ieee802_1x_set_sta_authorized(struct hostapd_data *hapd,
  99                                    struct sta_info *sta, int authorized)
 100 {
 101         int res;
 102
 103         if (sta->flags & WLAN_STA_PREAUTH)
 104                 return;
 105
 106         if (authorized) {
 107                 ap_sta_set_authorized(hapd, sta, 1);
 108                 res = hostapd_set_authorized(hapd, sta, 1);
 109                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 110                                HOSTAPD_LEVEL_DEBUG, "authorizing port");
 111         } else {
 112                 ap_sta_set_authorized(hapd, sta, 0);
 113                 res = hostapd_set_authorized(hapd, sta, 0);
 114                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 115                                HOSTAPD_LEVEL_DEBUG, "unauthorizing port");
 116         }
 117
 118         if (res && errno != ENOENT) {
 119                 wpa_printf(MSG_DEBUG, "Could not set station " MACSTR
 120                            " flags for kernel driver (errno=%d).",
 121                            MAC2STR(sta->addr), errno);
 122         }
 123
 124         if (authorized) {
 125                 os_get_reltime(&sta->connected_time);
 126                 accounting_sta_start(hapd, sta);
 127         }
 128 }
 129
 130
 131 #ifndef CONFIG_FIPS
 132 #ifndef CONFIG_NO_RC4
 133
 134 static void ieee802_1x_tx_key_one(struct hostapd_data *hapd,
 135                                   struct sta_info *sta,
 136                                   int idx, int broadcast,
 137                                   u8 *key_data, size_t key_len)
 138 {
 139         u8 *buf, *ekey;
 140         struct ieee802_1x_hdr *hdr;
 141         struct ieee802_1x_eapol_key *key;
 142         size_t len, ekey_len;
 143         struct eapol_state_machine *sm = sta->eapol_sm;
 144
 145         if (sm == NULL)
 146                 return;
 147
 148         len = sizeof(*key) + key_len;
 149         buf = os_zalloc(sizeof(*hdr) + len);
 150         if (buf == NULL)
 151                 return;
 152
 153         hdr = (struct ieee802_1x_hdr *) buf;
 154         key = (struct ieee802_1x_eapol_key *) (hdr + 1);
 155         key->type = EAPOL_KEY_TYPE_RC4;
 156         WPA_PUT_BE16(key->key_length, key_len);
 157         wpa_get_ntp_timestamp(key->replay_counter);
 158
 159         if (random_get_bytes(key->key_iv, sizeof(key->key_iv))) {
 160                 wpa_printf(MSG_ERROR, "Could not get random numbers");
 161                 os_free(buf);
 162                 return;
 163         }
 164
 165         key->key_index = idx | (broadcast ? 0 : BIT(7));
 166         if (hapd->conf->eapol_key_index_workaround) {
 167                 /* According to some information, WinXP Supplicant seems to
 168                  * interpret bit7 as an indication whether the key is to be
 169                  * activated, so make it possible to enable workaround that
 170                  * sets this bit for all keys. */
 171                 key->key_index |= BIT(7);
 172         }
 173
 174         /* Key is encrypted using "Key-IV + MSK[0..31]" as the RC4-key and
 175          * MSK[32..63] is used to sign the message. */
 176         if (sm->eap_if->eapKeyData == NULL || sm->eap_if->eapKeyDataLen < 64) {
 177                 wpa_printf(MSG_ERROR, "No eapKeyData available for encrypting "
 178                            "and signing EAPOL-Key");
 179                 os_free(buf);
 180                 return;
 181         }
 182         os_memcpy((u8 *) (key + 1), key_data, key_len);
 183         ekey_len = sizeof(key->key_iv) + 32;
 184         ekey = os_malloc(ekey_len);
 185         if (ekey == NULL) {
 186                 wpa_printf(MSG_ERROR, "Could not encrypt key");
 187                 os_free(buf);
 188                 return;
 189         }
 190         os_memcpy(ekey, key->key_iv, sizeof(key->key_iv));
 191         os_memcpy(ekey + sizeof(key->key_iv), sm->eap_if->eapKeyData, 32);
 192         rc4_skip(ekey, ekey_len, 0, (u8 *) (key + 1), key_len);
 193         os_free(ekey);
 194
 195         /* This header is needed here for HMAC-MD5, but it will be regenerated
 196          * in ieee802_1x_send() */
 197         hdr->version = hapd->conf->eapol_version;
 198         hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
 199         hdr->length = host_to_be16(len);
 200         hmac_md5(sm->eap_if->eapKeyData + 32, 32, buf, sizeof(*hdr) + len,
 201                  key->key_signature);
 202
 203         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key to " MACSTR
 204                    " (%s index=%d)", MAC2STR(sm->addr),
 205                    broadcast ? "broadcast" : "unicast", idx);
 206         ieee802_1x_send(hapd, sta, IEEE802_1X_TYPE_EAPOL_KEY, (u8 *) key, len);
 207         if (sta->eapol_sm)
 208                 sta->eapol_sm->dot1xAuthEapolFramesTx++;
 209         os_free(buf);
 210 }
 211
 212
 213 static void ieee802_1x_tx_key(struct hostapd_data *hapd, struct sta_info *sta)
 214 {
 215         struct eapol_authenticator *eapol = hapd->eapol_auth;
 216         struct eapol_state_machine *sm = sta->eapol_sm;
 217
 218         if (sm == NULL || !sm->eap_if->eapKeyData)
 219                 return;
 220
 221         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key(s) to " MACSTR,
 222                    MAC2STR(sta->addr));
 223
 224 #ifndef CONFIG_NO_VLAN
 225         if (sta->vlan_id > 0) {
 226                 wpa_printf(MSG_ERROR, "Using WEP with vlans is not supported.");
 227                 return;
 228         }
 229 #endif /* CONFIG_NO_VLAN */
 230
 231         if (eapol->default_wep_key) {
 232                 ieee802_1x_tx_key_one(hapd, sta, eapol->default_wep_key_idx, 1,
 233                                       eapol->default_wep_key,
 234                                       hapd->conf->default_wep_key_len);
 235         }
 236
 237         if (hapd->conf->individual_wep_key_len > 0) {
 238                 u8 *ikey;
 239                 ikey = os_malloc(hapd->conf->individual_wep_key_len);
 240                 if (ikey == NULL ||
 241                     random_get_bytes(ikey, hapd->conf->individual_wep_key_len))
 242                 {
 243                         wpa_printf(MSG_ERROR, "Could not generate random "
 244                                    "individual WEP key.");
 245                         os_free(ikey);
 246                         return;
 247                 }
 248
 249                 wpa_hexdump_key(MSG_DEBUG, "Individual WEP key",
 250                                 ikey, hapd->conf->individual_wep_key_len);
 251
 252                 ieee802_1x_tx_key_one(hapd, sta, 0, 0, ikey,
 253                                       hapd->conf->individual_wep_key_len);
 254
 255                 /* TODO: set encryption in TX callback, i.e., only after STA
 256                  * has ACKed EAPOL-Key frame */
 257                 if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
 258                                         sta->addr, 0, 1, NULL, 0, ikey,
 259                                         hapd->conf->individual_wep_key_len)) {
 260                         wpa_printf(MSG_ERROR, "Could not set individual WEP "
 261                                    "encryption.");
 262                 }
 263
 264                 os_free(ikey);
 265         }
 266 }
 267
 268 #endif /* CONFIG_NO_RC4 */
 269 #endif /* CONFIG_FIPS */
 270
 271
 272 const char *radius_mode_txt(struct hostapd_data *hapd)
 273 {
 274         switch (hapd->iface->conf->hw_mode) {
 275         case HOSTAPD_MODE_IEEE80211AD:
 276                 return "802.11ad";
 277         case HOSTAPD_MODE_IEEE80211A:
 278                 return "802.11a";
 279         case HOSTAPD_MODE_IEEE80211G:
 280                 return "802.11g";
 281         case HOSTAPD_MODE_IEEE80211B:
 282         default:
 283                 return "802.11b";
 284         }
 285 }
 286
 287
 288 int radius_sta_rate(struct hostapd_data *hapd, struct sta_info *sta)
 289 {
 290         int i;
 291         u8 rate = 0;
 292
 293         for (i = 0; i < sta->supported_rates_len; i++)
 294                 if ((sta->supported_rates[i] & 0x7f) > rate)
 295                         rate = sta->supported_rates[i] & 0x7f;
 296
 297         return rate;
 298 }
 299
 300
 301 #ifndef CONFIG_NO_RADIUS
 302 static void ieee802_1x_learn_identity(struct hostapd_data *hapd,
 303                                       struct eapol_state_machine *sm,
 304                                       const u8 *eap, size_t len)
 305 {
 306         const u8 *identity;
 307         size_t identity_len;
 308         const struct eap_hdr *hdr = (const struct eap_hdr *) eap;
 309
 310         if (len <= sizeof(struct eap_hdr) ||
 311             (hdr->code == EAP_CODE_RESPONSE &&
 312              eap[sizeof(struct eap_hdr)] != EAP_TYPE_IDENTITY) ||
 313             (hdr->code == EAP_CODE_INITIATE &&
 314              eap[sizeof(struct eap_hdr)] != EAP_ERP_TYPE_REAUTH) ||
 315             (hdr->code != EAP_CODE_RESPONSE &&
 316              hdr->code != EAP_CODE_INITIATE))
 317                 return;
 318
 319         identity = eap_get_identity(sm->eap, &identity_len);
 320         if (identity == NULL)
 321                 return;
 322
 323         /* Save station identity for future RADIUS packets */
 324         os_free(sm->identity);
 325         sm->identity = (u8 *) dup_binstr(identity, identity_len);
 326         if (sm->identity == NULL) {
 327                 sm->identity_len = 0;
 328                 return;
 329         }
 330
 331         sm->identity_len = identity_len;
 332         hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
 333                        HOSTAPD_LEVEL_DEBUG, "STA identity '%s'", sm->identity);
 334         sm->dot1xAuthEapolRespIdFramesRx++;
 335 }
 336
 337
 338 static int add_common_radius_sta_attr_rsn(struct hostapd_data *hapd,
 339                                           struct hostapd_radius_attr *req_attr,
 340                                           struct sta_info *sta,
 341                                           struct radius_msg *msg)
 342 {
 343         u32 suite;
 344         int ver, val;
 345
 346         ver = wpa_auth_sta_wpa_version(sta->wpa_sm);
 347         val = wpa_auth_get_pairwise(sta->wpa_sm);
 348         suite = wpa_cipher_to_suite(ver, val);
 349         if (val != -1 &&
 350             !hostapd_config_get_radius_attr(req_attr,
 351                                             RADIUS_ATTR_WLAN_PAIRWISE_CIPHER) &&
 352             !radius_msg_add_attr_int32(msg, RADIUS_ATTR_WLAN_PAIRWISE_CIPHER,
 353                                        suite)) {
 354                 wpa_printf(MSG_ERROR, "Could not add WLAN-Pairwise-Cipher");
 355                 return -1;
 356         }
 357
 358         suite = wpa_cipher_to_suite(((hapd->conf->wpa & 0x2) ||
 359                                      hapd->conf->osen) ?
 360                                     WPA_PROTO_RSN : WPA_PROTO_WPA,
 361                                     hapd->conf->wpa_group);
 362         if (!hostapd_config_get_radius_attr(req_attr,
 363                                             RADIUS_ATTR_WLAN_GROUP_CIPHER) &&
 364             !radius_msg_add_attr_int32(msg, RADIUS_ATTR_WLAN_GROUP_CIPHER,
 365                                        suite)) {
 366                 wpa_printf(MSG_ERROR, "Could not add WLAN-Group-Cipher");
 367                 return -1;
 368         }
 369
 370         val = wpa_auth_sta_key_mgmt(sta->wpa_sm);
 371         suite = wpa_akm_to_suite(val);
 372         if (val != -1 &&
 373             !hostapd_config_get_radius_attr(req_attr,
 374                                             RADIUS_ATTR_WLAN_AKM_SUITE) &&
 375             !radius_msg_add_attr_int32(msg, RADIUS_ATTR_WLAN_AKM_SUITE,
 376                                        suite)) {
 377                 wpa_printf(MSG_ERROR, "Could not add WLAN-AKM-Suite");
 378                 return -1;
 379         }
 380
 381 #ifdef CONFIG_IEEE80211W
 382         if (hapd->conf->ieee80211w != NO_MGMT_FRAME_PROTECTION) {
 383                 suite = wpa_cipher_to_suite(WPA_PROTO_RSN,
 384                                             hapd->conf->group_mgmt_cipher);
 385                 if (!hostapd_config_get_radius_attr(
 386                             req_attr, RADIUS_ATTR_WLAN_GROUP_MGMT_CIPHER) &&
 387                     !radius_msg_add_attr_int32(
 388                             msg, RADIUS_ATTR_WLAN_GROUP_MGMT_CIPHER, suite)) {
 389                         wpa_printf(MSG_ERROR,
 390                                    "Could not add WLAN-Group-Mgmt-Cipher");
 391                         return -1;
 392                 }
 393         }
 394 #endif /* CONFIG_IEEE80211W */
 395
 396         return 0;
 397 }
 398
 399
 400 static int add_common_radius_sta_attr(struct hostapd_data *hapd,
 401                                       struct hostapd_radius_attr *req_attr,
 402                                       struct sta_info *sta,
 403                                       struct radius_msg *msg)
 404 {
 405         char buf[128];
 406
 407         if (!hostapd_config_get_radius_attr(req_attr,
 408                                             RADIUS_ATTR_SERVICE_TYPE) &&
 409             !radius_msg_add_attr_int32(msg, RADIUS_ATTR_SERVICE_TYPE,
 410                                        RADIUS_SERVICE_TYPE_FRAMED)) {
 411                 wpa_printf(MSG_ERROR, "Could not add Service-Type");
 412                 return -1;
 413         }
 414
 415         if (!hostapd_config_get_radius_attr(req_attr,
 416                                             RADIUS_ATTR_NAS_PORT) &&
 417             !radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT, sta->aid)) {
 418                 wpa_printf(MSG_ERROR, "Could not add NAS-Port");
 419                 return -1;
 420         }
 421
 422         os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
 423                     MAC2STR(sta->addr));
 424         buf[sizeof(buf) - 1] = '\0';
 425         if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID,
 426                                  (u8 *) buf, os_strlen(buf))) {
 427                 wpa_printf(MSG_ERROR, "Could not add Calling-Station-Id");
 428                 return -1;
 429         }
 430
 431         if (sta->flags & WLAN_STA_PREAUTH) {
 432                 os_strlcpy(buf, "IEEE 802.11i Pre-Authentication",
 433                            sizeof(buf));
 434         } else {
 435                 os_snprintf(buf, sizeof(buf), "CONNECT %d%sMbps %s",
 436                             radius_sta_rate(hapd, sta) / 2,
 437                             (radius_sta_rate(hapd, sta) & 1) ? ".5" : "",
 438                             radius_mode_txt(hapd));
 439                 buf[sizeof(buf) - 1] = '\0';
 440         }
 441         if (!hostapd_config_get_radius_attr(req_attr,
 442                                             RADIUS_ATTR_CONNECT_INFO) &&
 443             !radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO,
 444                                  (u8 *) buf, os_strlen(buf))) {
 445                 wpa_printf(MSG_ERROR, "Could not add Connect-Info");
 446                 return -1;
 447         }
 448
 449         if (sta->acct_session_id) {
 450                 os_snprintf(buf, sizeof(buf), "%016llX",
 451                             (unsigned long long) sta->acct_session_id);
 452                 if (!radius_msg_add_attr(msg, RADIUS_ATTR_ACCT_SESSION_ID,
 453                                          (u8 *) buf, os_strlen(buf))) {
 454                         wpa_printf(MSG_ERROR, "Could not add Acct-Session-Id");
 455                         return -1;
 456                 }
 457         }
 458
 459         if ((hapd->conf->wpa & 2) &&
 460             !hapd->conf->disable_pmksa_caching &&
 461             sta->eapol_sm && sta->eapol_sm->acct_multi_session_id) {
 462                 os_snprintf(buf, sizeof(buf), "%016llX",
 463                             (unsigned long long)
 464                             sta->eapol_sm->acct_multi_session_id);
 465                 if (!radius_msg_add_attr(
 466                             msg, RADIUS_ATTR_ACCT_MULTI_SESSION_ID,
 467                             (u8 *) buf, os_strlen(buf))) {
 468                         wpa_printf(MSG_INFO,
 469                                    "Could not add Acct-Multi-Session-Id");
 470                         return -1;
 471                 }
 472         }
 473
 474 #ifdef CONFIG_IEEE80211R
 475         if (hapd->conf->wpa && wpa_key_mgmt_ft(hapd->conf->wpa_key_mgmt) &&
 476             sta->wpa_sm &&
 477             (wpa_key_mgmt_ft(wpa_auth_sta_key_mgmt(sta->wpa_sm)) ||
 478              sta->auth_alg == WLAN_AUTH_FT) &&
 479             !hostapd_config_get_radius_attr(req_attr,
 480                                             RADIUS_ATTR_MOBILITY_DOMAIN_ID) &&
 481             !radius_msg_add_attr_int32(msg, RADIUS_ATTR_MOBILITY_DOMAIN_ID,
 482                                        WPA_GET_BE16(
 483                                                hapd->conf->mobility_domain))) {
 484                 wpa_printf(MSG_ERROR, "Could not add Mobility-Domain-Id");
 485                 return -1;
 486         }
 487 #endif /* CONFIG_IEEE80211R */
 488
 489         if ((hapd->conf->wpa || hapd->conf->osen) && sta->wpa_sm &&
 490             add_common_radius_sta_attr_rsn(hapd, req_attr, sta, msg) < 0)
 491                 return -1;
 492
 493         return 0;
 494 }
 495
 496
 497 int add_common_radius_attr(struct hostapd_data *hapd,
 498                            struct hostapd_radius_attr *req_attr,
 499                            struct sta_info *sta,
 500                            struct radius_msg *msg)
 501 {
 502         char buf[128];
 503         struct hostapd_radius_attr *attr;
 504         int len;
 505
 506         if (!hostapd_config_get_radius_attr(req_attr,
 507                                             RADIUS_ATTR_NAS_IP_ADDRESS) &&
 508             hapd->conf->own_ip_addr.af == AF_INET &&
 509             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS,
 510                                  (u8 *) &hapd->conf->own_ip_addr.u.v4, 4)) {
 511                 wpa_printf(MSG_ERROR, "Could not add NAS-IP-Address");
 512                 return -1;
 513         }
 514
 515 #ifdef CONFIG_IPV6
 516         if (!hostapd_config_get_radius_attr(req_attr,
 517                                             RADIUS_ATTR_NAS_IPV6_ADDRESS) &&
 518             hapd->conf->own_ip_addr.af == AF_INET6 &&
 519             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IPV6_ADDRESS,
 520                                  (u8 *) &hapd->conf->own_ip_addr.u.v6, 16)) {
 521                 wpa_printf(MSG_ERROR, "Could not add NAS-IPv6-Address");
 522                 return -1;
 523         }
 524 #endif /* CONFIG_IPV6 */
 525
 526         if (!hostapd_config_get_radius_attr(req_attr,
 527                                             RADIUS_ATTR_NAS_IDENTIFIER) &&
 528             hapd->conf->nas_identifier &&
 529             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IDENTIFIER,
 530                                  (u8 *) hapd->conf->nas_identifier,
 531                                  os_strlen(hapd->conf->nas_identifier))) {
 532                 wpa_printf(MSG_ERROR, "Could not add NAS-Identifier");
 533                 return -1;
 534         }
 535
 536         len = os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT ":",
 537                           MAC2STR(hapd->own_addr));
 538         os_memcpy(&buf[len], hapd->conf->ssid.ssid,
 539                   hapd->conf->ssid.ssid_len);
 540         len += hapd->conf->ssid.ssid_len;
 541         if (!hostapd_config_get_radius_attr(req_attr,
 542                                             RADIUS_ATTR_CALLED_STATION_ID) &&
 543             !radius_msg_add_attr(msg, RADIUS_ATTR_CALLED_STATION_ID,
 544                                  (u8 *) buf, len)) {
 545                 wpa_printf(MSG_ERROR, "Could not add Called-Station-Id");
 546                 return -1;
 547         }
 548
 549         if (!hostapd_config_get_radius_attr(req_attr,
 550                                             RADIUS_ATTR_NAS_PORT_TYPE) &&
 551             !radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT_TYPE,
 552                                        RADIUS_NAS_PORT_TYPE_IEEE_802_11)) {
 553                 wpa_printf(MSG_ERROR, "Could not add NAS-Port-Type");
 554                 return -1;
 555         }
 556
 557 #ifdef CONFIG_INTERWORKING
 558         if (hapd->conf->interworking &&
 559             !is_zero_ether_addr(hapd->conf->hessid)) {
 560                 os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
 561                             MAC2STR(hapd->conf->hessid));
 562                 buf[sizeof(buf) - 1] = '\0';
 563                 if (!hostapd_config_get_radius_attr(req_attr,
 564                                                     RADIUS_ATTR_WLAN_HESSID) &&
 565                     !radius_msg_add_attr(msg, RADIUS_ATTR_WLAN_HESSID,
 566                                          (u8 *) buf, os_strlen(buf))) {
 567                         wpa_printf(MSG_ERROR, "Could not add WLAN-HESSID");
 568                         return -1;
 569                 }
 570         }
 571 #endif /* CONFIG_INTERWORKING */
 572
 573         if (sta && add_common_radius_sta_attr(hapd, req_attr, sta, msg) < 0)
 574                 return -1;
 575
 576         for (attr = req_attr; attr; attr = attr->next) {
 577                 if (!radius_msg_add_attr(msg, attr->type,
 578                                          wpabuf_head(attr->val),
 579                                          wpabuf_len(attr->val))) {
 580                         wpa_printf(MSG_ERROR, "Could not add RADIUS "
 581                                    "attribute");
 582                         return -1;
 583                 }
 584         }
 585
 586         return 0;
 587 }
 588
 589
 590 static void ieee802_1x_encapsulate_radius(struct hostapd_data *hapd,
 591                                           struct sta_info *sta,
 592                                           const u8 *eap, size_t len)
 593 {
 594         struct radius_msg *msg;
 595         struct eapol_state_machine *sm = sta->eapol_sm;
 596
 597         if (sm == NULL)
 598                 return;
 599
 600         ieee802_1x_learn_identity(hapd, sm, eap, len);
 601
 602         wpa_printf(MSG_DEBUG, "Encapsulating EAP message into a RADIUS "
 603                    "packet");
 604
 605         sm->radius_identifier = radius_client_get_id(hapd->radius);
 606         msg = radius_msg_new(RADIUS_CODE_ACCESS_REQUEST,
 607                              sm->radius_identifier);
 608         if (msg == NULL) {
 609                 wpa_printf(MSG_INFO, "Could not create new RADIUS packet");
 610                 return;
 611         }
 612
 613         if (radius_msg_make_authenticator(msg) < 0) {
 614                 wpa_printf(MSG_INFO, "Could not make Request Authenticator");
 615                 goto fail;
 616         }
 617
 618         if (sm->identity &&
 619             !radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME,
 620                                  sm->identity, sm->identity_len)) {
 621                 wpa_printf(MSG_INFO, "Could not add User-Name");
 622                 goto fail;
 623         }
 624
 625         if (add_common_radius_attr(hapd, hapd->conf->radius_auth_req_attr, sta,
 626                                    msg) < 0)
 627                 goto fail;
 628
 629         /* TODO: should probably check MTU from driver config; 2304 is max for
 630          * IEEE 802.11, but use 1400 to avoid problems with too large packets
 631          */
 632         if (!hostapd_config_get_radius_attr(hapd->conf->radius_auth_req_attr,
 633                                             RADIUS_ATTR_FRAMED_MTU) &&
 634             !radius_msg_add_attr_int32(msg, RADIUS_ATTR_FRAMED_MTU, 1400)) {
 635                 wpa_printf(MSG_INFO, "Could not add Framed-MTU");
 636                 goto fail;
 637         }
 638
 639         if (!radius_msg_add_eap(msg, eap, len)) {
 640                 wpa_printf(MSG_INFO, "Could not add EAP-Message");
 641                 goto fail;
 642         }
 643
 644         /* State attribute must be copied if and only if this packet is
 645          * Access-Request reply to the previous Access-Challenge */
 646         if (sm->last_recv_radius &&
 647             radius_msg_get_hdr(sm->last_recv_radius)->code ==
 648             RADIUS_CODE_ACCESS_CHALLENGE) {
 649                 int res = radius_msg_copy_attr(msg, sm->last_recv_radius,
 650                                                RADIUS_ATTR_STATE);
 651                 if (res < 0) {
 652                         wpa_printf(MSG_INFO, "Could not copy State attribute from previous Access-Challenge");
 653                         goto fail;
 654                 }
 655                 if (res > 0) {
 656                         wpa_printf(MSG_DEBUG, "Copied RADIUS State Attribute");
 657                 }
 658         }
 659
 660         if (hapd->conf->radius_request_cui) {
 661                 const u8 *cui;
 662                 size_t cui_len;
 663                 /* Add previously learned CUI or nul CUI to request CUI */
 664                 if (sm->radius_cui) {
 665                         cui = wpabuf_head(sm->radius_cui);
 666                         cui_len = wpabuf_len(sm->radius_cui);
 667                 } else {
 668                         cui = (const u8 *) "\0";
 669                         cui_len = 1;
 670                 }
 671                 if (!radius_msg_add_attr(msg,
 672                                          RADIUS_ATTR_CHARGEABLE_USER_IDENTITY,
 673                                          cui, cui_len)) {
 674                         wpa_printf(MSG_ERROR, "Could not add CUI");
 675                         goto fail;
 676                 }
 677         }
 678
 679 #ifdef CONFIG_HS20
 680         if (hapd->conf->hs20) {
 681                 u8 ver = 1; /* Release 2 */
 682                 if (!radius_msg_add_wfa(
 683                             msg, RADIUS_VENDOR_ATTR_WFA_HS20_AP_VERSION,
 684                             &ver, 1)) {
 685                         wpa_printf(MSG_ERROR, "Could not add HS 2.0 AP "
 686                                    "version");
 687                         goto fail;
 688                 }
 689
 690                 if (sta->hs20_ie && wpabuf_len(sta->hs20_ie) > 0) {
 691                         const u8 *pos;
 692                         u8 buf[3];
 693                         u16 id;
 694                         pos = wpabuf_head_u8(sta->hs20_ie);
 695                         buf[0] = (*pos) >> 4;
 696                         if (((*pos) & HS20_PPS_MO_ID_PRESENT) &&
 697                             wpabuf_len(sta->hs20_ie) >= 3)
 698                                 id = WPA_GET_LE16(pos + 1);
 699                         else
 700                                 id = 0;
 701                         WPA_PUT_BE16(buf + 1, id);
 702                         if (!radius_msg_add_wfa(
 703                                     msg,
 704                                     RADIUS_VENDOR_ATTR_WFA_HS20_STA_VERSION,
 705                                     buf, sizeof(buf))) {
 706                                 wpa_printf(MSG_ERROR, "Could not add HS 2.0 "
 707                                            "STA version");
 708                                 goto fail;
 709                         }
 710                 }
 711         }
 712 #endif /* CONFIG_HS20 */
 713
 714         if (radius_client_send(hapd->radius, msg, RADIUS_AUTH, sta->addr) < 0)
 715                 goto fail;
 716
 717         return;
 718
 719  fail:
 720         radius_msg_free(msg);
 721 }
 722 #endif /* CONFIG_NO_RADIUS */
 723
 724
 725 static void handle_eap_response(struct hostapd_data *hapd,
 726                                 struct sta_info *sta, struct eap_hdr *eap,
 727                                 size_t len)
 728 {
 729         u8 type, *data;
 730         struct eapol_state_machine *sm = sta->eapol_sm;
 731         if (sm == NULL)
 732                 return;
 733
 734         data = (u8 *) (eap + 1);
 735
 736         if (len < sizeof(*eap) + 1) {
 737                 wpa_printf(MSG_INFO, "handle_eap_response: too short response data");
 738                 return;
 739         }
 740
 741         sm->eap_type_supp = type = data[0];
 742
 743         hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
 744                        HOSTAPD_LEVEL_DEBUG, "received EAP packet (code=%d "
 745                        "id=%d len=%d) from STA: EAP Response-%s (%d)",
 746                        eap->code, eap->identifier, be_to_host16(eap->length),
 747                        eap_server_get_name(0, type), type);
 748
 749         sm->dot1xAuthEapolRespFramesRx++;
 750
 751         wpabuf_free(sm->eap_if->eapRespData);
 752         sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len);
 753         sm->eapolEap = TRUE;
 754 }
 755
 756
 757 static void handle_eap_initiate(struct hostapd_data *hapd,
 758                                 struct sta_info *sta, struct eap_hdr *eap,
 759                                 size_t len)
 760 {
 761 #ifdef CONFIG_ERP
 762         u8 type, *data;
 763         struct eapol_state_machine *sm = sta->eapol_sm;
 764
 765         if (sm == NULL)
 766                 return;
 767
 768         if (len < sizeof(*eap) + 1) {
 769                 wpa_printf(MSG_INFO,
 770                            "handle_eap_initiate: too short response data");
 771                 return;
 772         }
 773
 774         data = (u8 *) (eap + 1);
 775         type = data[0];
 776
 777         hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
 778                        HOSTAPD_LEVEL_DEBUG, "received EAP packet (code=%d "
 779                        "id=%d len=%d) from STA: EAP Initiate type %u",
 780                        eap->code, eap->identifier, be_to_host16(eap->length),
 781                        type);
 782
 783         wpabuf_free(sm->eap_if->eapRespData);
 784         sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len);
 785         sm->eapolEap = TRUE;
 786 #endif /* CONFIG_ERP */
 787 }
 788
 789
 790 /* Process incoming EAP packet from Supplicant */
 791 static void handle_eap(struct hostapd_data *hapd, struct sta_info *sta,
 792                        u8 *buf, size_t len)
 793 {
 794         struct eap_hdr *eap;
 795         u16 eap_len;
 796
 797         if (len < sizeof(*eap)) {
 798                 wpa_printf(MSG_INFO, "   too short EAP packet");
 799                 return;
 800         }
 801
 802         eap = (struct eap_hdr *) buf;
 803
 804         eap_len = be_to_host16(eap->length);
 805         wpa_printf(MSG_DEBUG, "EAP: code=%d identifier=%d length=%d",
 806                    eap->code, eap->identifier, eap_len);
 807         if (eap_len < sizeof(*eap)) {
 808                 wpa_printf(MSG_DEBUG, "   Invalid EAP length");
 809                 return;
 810         } else if (eap_len > len) {
 811                 wpa_printf(MSG_DEBUG, "   Too short frame to contain this EAP "
 812                            "packet");
 813                 return;
 814         } else if (eap_len < len) {
 815                 wpa_printf(MSG_DEBUG, "   Ignoring %lu extra bytes after EAP "
 816                            "packet", (unsigned long) len - eap_len);
 817         }
 818
 819         switch (eap->code) {
 820         case EAP_CODE_REQUEST:
 821                 wpa_printf(MSG_DEBUG, " (request)");
 822                 return;
 823         case EAP_CODE_RESPONSE:
 824                 wpa_printf(MSG_DEBUG, " (response)");
 825                 handle_eap_response(hapd, sta, eap, eap_len);
 826                 break;
 827         case EAP_CODE_SUCCESS:
 828                 wpa_printf(MSG_DEBUG, " (success)");
 829                 return;
 830         case EAP_CODE_FAILURE:
 831                 wpa_printf(MSG_DEBUG, " (failure)");
 832                 return;
 833         case EAP_CODE_INITIATE:
 834                 wpa_printf(MSG_DEBUG, " (initiate)");
 835                 handle_eap_initiate(hapd, sta, eap, eap_len);
 836                 break;
 837         case EAP_CODE_FINISH:
 838                 wpa_printf(MSG_DEBUG, " (finish)");
 839                 break;
 840         default:
 841                 wpa_printf(MSG_DEBUG, " (unknown code)");
 842                 return;
 843         }
 844 }
 845
 846
 847 static struct eapol_state_machine *
 848 ieee802_1x_alloc_eapol_sm(struct hostapd_data *hapd, struct sta_info *sta)
 849 {
 850         int flags = 0;
 851         if (sta->flags & WLAN_STA_PREAUTH)
 852                 flags |= EAPOL_SM_PREAUTH;
 853         if (sta->wpa_sm) {
 854                 flags |= EAPOL_SM_USES_WPA;
 855                 if (wpa_auth_sta_get_pmksa(sta->wpa_sm))
 856                         flags |= EAPOL_SM_FROM_PMKSA_CACHE;
 857         }
 858         return eapol_auth_alloc(hapd->eapol_auth, sta->addr, flags,
 859                                 sta->wps_ie, sta->p2p_ie, sta,
 860                                 sta->identity, sta->radius_cui);
 861 }
 862
 863
 864 static void ieee802_1x_save_eapol(struct sta_info *sta, const u8 *buf,
 865                                   size_t len)
 866 {
 867         if (sta->pending_eapol_rx) {
 868                 wpabuf_free(sta->pending_eapol_rx->buf);
 869         } else {
 870                 sta->pending_eapol_rx =
 871                         os_malloc(sizeof(*sta->pending_eapol_rx));
 872                 if (!sta->pending_eapol_rx)
 873                         return;
 874         }
 875
 876         sta->pending_eapol_rx->buf = wpabuf_alloc_copy(buf, len);
 877         if (!sta->pending_eapol_rx->buf) {
 878                 os_free(sta->pending_eapol_rx);
 879                 sta->pending_eapol_rx = NULL;
 880                 return;
 881         }
 882
 883         os_get_reltime(&sta->pending_eapol_rx->rx_time);
 884 }
 885
 886
 887 /**
 888  * ieee802_1x_receive - Process the EAPOL frames from the Supplicant
 889  * @hapd: hostapd BSS data
 890  * @sa: Source address (sender of the EAPOL frame)
 891  * @buf: EAPOL frame
 892  * @len: Length of buf in octets
 893  *
 894  * This function is called for each incoming EAPOL frame from the interface
 895  */
 896 void ieee802_1x_receive(struct hostapd_data *hapd, const u8 *sa, const u8 *buf,
 897                         size_t len)
 898 {
 899         struct sta_info *sta;
 900         struct ieee802_1x_hdr *hdr;
 901         struct ieee802_1x_eapol_key *key;
 902         u16 datalen;
 903         struct rsn_pmksa_cache_entry *pmksa;
 904         int key_mgmt;
 905
 906         if (!hapd->conf->ieee802_1x && !hapd->conf->wpa && !hapd->conf->osen &&
 907             !hapd->conf->wps_state)
 908                 return;
 909
 910         wpa_printf(MSG_DEBUG, "IEEE 802.1X: %lu bytes from " MACSTR,
 911                    (unsigned long) len, MAC2STR(sa));
 912         sta = ap_get_sta(hapd, sa);
 913         if (!sta || (!(sta->flags & (WLAN_STA_ASSOC | WLAN_STA_PREAUTH)) &&
 914                      !(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_WIRED))) {
 915                 wpa_printf(MSG_DEBUG, "IEEE 802.1X data frame from not "
 916                            "associated/Pre-authenticating STA");
 917
 918                 if (sta && (sta->flags & WLAN_STA_AUTH)) {
 919                         wpa_printf(MSG_DEBUG, "Saving EAPOL frame from " MACSTR
 920                                    " for later use", MAC2STR(sta->addr));
 921                         ieee802_1x_save_eapol(sta, buf, len);
 922                 }
 923
 924                 return;
 925         }
 926
 927         if (len < sizeof(*hdr)) {
 928                 wpa_printf(MSG_INFO, "   too short IEEE 802.1X packet");
 929                 return;
 930         }
 931
 932         hdr = (struct ieee802_1x_hdr *) buf;
 933         datalen = be_to_host16(hdr->length);
 934         wpa_printf(MSG_DEBUG, "   IEEE 802.1X: version=%d type=%d length=%d",
 935                    hdr->version, hdr->type, datalen);
 936
 937         if (len - sizeof(*hdr) < datalen) {
 938                 wpa_printf(MSG_INFO, "   frame too short for this IEEE 802.1X packet");
 939                 if (sta->eapol_sm)
 940                         sta->eapol_sm->dot1xAuthEapLengthErrorFramesRx++;
 941                 return;
 942         }
 943         if (len - sizeof(*hdr) > datalen) {
 944                 wpa_printf(MSG_DEBUG, "   ignoring %lu extra octets after "
 945                            "IEEE 802.1X packet",
 946                            (unsigned long) len - sizeof(*hdr) - datalen);
 947         }
 948
 949         if (sta->eapol_sm) {
 950                 sta->eapol_sm->dot1xAuthLastEapolFrameVersion = hdr->version;
 951                 sta->eapol_sm->dot1xAuthEapolFramesRx++;
 952         }
 953
 954         key = (struct ieee802_1x_eapol_key *) (hdr + 1);
 955         if (datalen >= sizeof(struct ieee802_1x_eapol_key) &&
 956             hdr->type == IEEE802_1X_TYPE_EAPOL_KEY &&
 957             (key->type == EAPOL_KEY_TYPE_WPA ||
 958              key->type == EAPOL_KEY_TYPE_RSN)) {
 959                 wpa_receive(hapd->wpa_auth, sta->wpa_sm, (u8 *) hdr,
 960                             sizeof(*hdr) + datalen);
 961                 return;
 962         }
 963
 964         if (!hapd->conf->ieee802_1x && !hapd->conf->osen &&
 965             !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) {
 966                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore EAPOL message - "
 967                            "802.1X not enabled and WPS not used");
 968                 return;
 969         }
 970
 971         key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm);
 972         if (key_mgmt != -1 && wpa_key_mgmt_wpa_psk(key_mgmt)) {
 973                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore EAPOL message - "
 974                            "STA is using PSK");
 975                 return;
 976         }
 977
 978         if (!sta->eapol_sm) {
 979                 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
 980                 if (!sta->eapol_sm)
 981                         return;
 982
 983 #ifdef CONFIG_WPS
 984                 if (!hapd->conf->ieee802_1x && hapd->conf->wps_state) {
 985                         u32 wflags = sta->flags & (WLAN_STA_WPS |
 986                                                    WLAN_STA_WPS2 |
 987                                                    WLAN_STA_MAYBE_WPS);
 988                         if (wflags == WLAN_STA_MAYBE_WPS ||
 989                             wflags == (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) {
 990                                 /*
 991                                  * Delay EAPOL frame transmission until a
 992                                  * possible WPS STA initiates the handshake
 993                                  * with EAPOL-Start. Only allow the wait to be
 994                                  * skipped if the STA is known to support WPS
 995                                  * 2.0.
 996                                  */
 997                                 wpa_printf(MSG_DEBUG, "WPS: Do not start "
 998                                            "EAPOL until EAPOL-Start is "
 999                                            "received");
1000                                 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
1001                         }
1002                 }
1003 #endif /* CONFIG_WPS */
1004
1005                 sta->eapol_sm->eap_if->portEnabled = TRUE;
1006         }
1007
1008         /* since we support version 1, we can ignore version field and proceed
1009          * as specified in version 1 standard [IEEE Std 802.1X-2001, 7.5.5] */
1010         /* TODO: actually, we are not version 1 anymore.. However, Version 2
1011          * does not change frame contents, so should be ok to process frames
1012          * more or less identically. Some changes might be needed for
1013          * verification of fields. */
1014
1015         switch (hdr->type) {
1016         case IEEE802_1X_TYPE_EAP_PACKET:
1017                 handle_eap(hapd, sta, (u8 *) (hdr + 1), datalen);
1018                 break;
1019
1020         case IEEE802_1X_TYPE_EAPOL_START:
1021                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1022                                HOSTAPD_LEVEL_DEBUG, "received EAPOL-Start "
1023                                "from STA");
1024                 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
1025                 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
1026                 if (pmksa) {
1027                         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
1028                                        HOSTAPD_LEVEL_DEBUG, "cached PMKSA "
1029                                        "available - ignore it since "
1030                                        "STA sent EAPOL-Start");
1031                         wpa_auth_sta_clear_pmksa(sta->wpa_sm, pmksa);
1032                 }
1033                 sta->eapol_sm->eapolStart = TRUE;
1034                 sta->eapol_sm->dot1xAuthEapolStartFramesRx++;
1035                 eap_server_clear_identity(sta->eapol_sm->eap);
1036                 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
1037                 break;
1038
1039         case IEEE802_1X_TYPE_EAPOL_LOGOFF:
1040                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1041                                HOSTAPD_LEVEL_DEBUG, "received EAPOL-Logoff "
1042                                "from STA");
1043                 sta->acct_terminate_cause =
1044                         RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
1045                 accounting_sta_stop(hapd, sta);
1046                 sta->eapol_sm->eapolLogoff = TRUE;
1047                 sta->eapol_sm->dot1xAuthEapolLogoffFramesRx++;
1048                 eap_server_clear_identity(sta->eapol_sm->eap);
1049                 break;
1050
1051         case IEEE802_1X_TYPE_EAPOL_KEY:
1052                 wpa_printf(MSG_DEBUG, "   EAPOL-Key");
1053                 if (!ap_sta_is_authorized(sta)) {
1054                         wpa_printf(MSG_DEBUG, "   Dropped key data from "
1055                                    "unauthorized Supplicant");
1056                         break;
1057                 }
1058                 break;
1059
1060         case IEEE802_1X_TYPE_EAPOL_ENCAPSULATED_ASF_ALERT:
1061                 wpa_printf(MSG_DEBUG, "   EAPOL-Encapsulated-ASF-Alert");
1062                 /* TODO: implement support for this; show data */
1063                 break;
1064
1065         default:
1066                 wpa_printf(MSG_DEBUG, "   unknown IEEE 802.1X packet type");
1067                 sta->eapol_sm->dot1xAuthInvalidEapolFramesRx++;
1068                 break;
1069         }
1070
1071         eapol_auth_step(sta->eapol_sm);
1072 }
1073
1074
1075 /**
1076  * ieee802_1x_new_station - Start IEEE 802.1X authentication
1077  * @hapd: hostapd BSS data
1078  * @sta: The station
1079  *
1080  * This function is called to start IEEE 802.1X authentication when a new
1081  * station completes IEEE 802.11 association.
1082  */
1083 void ieee802_1x_new_station(struct hostapd_data *hapd, struct sta_info *sta)
1084 {
1085         struct rsn_pmksa_cache_entry *pmksa;
1086         int reassoc = 1;
1087         int force_1x = 0;
1088         int key_mgmt;
1089
1090 #ifdef CONFIG_WPS
1091         if (hapd->conf->wps_state &&
1092             ((hapd->conf->wpa && (sta->flags & WLAN_STA_MAYBE_WPS)) ||
1093              (sta->flags & WLAN_STA_WPS))) {
1094                 /*
1095                  * Need to enable IEEE 802.1X/EAPOL state machines for possible
1096                  * WPS handshake even if IEEE 802.1X/EAPOL is not used for
1097                  * authentication in this BSS.
1098                  */
1099                 force_1x = 1;
1100         }
1101 #endif /* CONFIG_WPS */
1102
1103         if (!force_1x && !hapd->conf->ieee802_1x && !hapd->conf->osen) {
1104                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - "
1105                            "802.1X not enabled or forced for WPS");
1106                 /*
1107                  * Clear any possible EAPOL authenticator state to support
1108                  * reassociation change from WPS to PSK.
1109                  */
1110                 ieee802_1x_free_station(hapd, sta);
1111                 return;
1112         }
1113
1114         key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm);
1115         if (key_mgmt != -1 && wpa_key_mgmt_wpa_psk(key_mgmt)) {
1116                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - using PSK");
1117                 /*
1118                  * Clear any possible EAPOL authenticator state to support
1119                  * reassociation change from WPA-EAP to PSK.
1120                  */
1121                 ieee802_1x_free_station(hapd, sta);
1122                 return;
1123         }
1124
1125         if (sta->eapol_sm == NULL) {
1126                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1127                                HOSTAPD_LEVEL_DEBUG, "start authentication");
1128                 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
1129                 if (sta->eapol_sm == NULL) {
1130                         hostapd_logger(hapd, sta->addr,
1131                                        HOSTAPD_MODULE_IEEE8021X,
1132                                        HOSTAPD_LEVEL_INFO,
1133                                        "failed to allocate state machine");
1134                         return;
1135                 }
1136                 reassoc = 0;
1137         }
1138
1139 #ifdef CONFIG_WPS
1140         sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
1141         if (!hapd->conf->ieee802_1x && hapd->conf->wps_state &&
1142             !(sta->flags & WLAN_STA_WPS2)) {
1143                 /*
1144                  * Delay EAPOL frame transmission until a possible WPS STA
1145                  * initiates the handshake with EAPOL-Start. Only allow the
1146                  * wait to be skipped if the STA is known to support WPS 2.0.
1147                  */
1148                 wpa_printf(MSG_DEBUG, "WPS: Do not start EAPOL until "
1149                            "EAPOL-Start is received");
1150                 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
1151         }
1152 #endif /* CONFIG_WPS */
1153
1154         sta->eapol_sm->eap_if->portEnabled = TRUE;
1155
1156 #ifdef CONFIG_IEEE80211R
1157         if (sta->auth_alg == WLAN_AUTH_FT) {
1158                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1159                                HOSTAPD_LEVEL_DEBUG,
1160                                "PMK from FT - skip IEEE 802.1X/EAP");
1161                 /* Setup EAPOL state machines to already authenticated state
1162                  * because of existing FT information from R0KH. */
1163                 sta->eapol_sm->keyRun = TRUE;
1164                 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
1165                 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
1166                 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
1167                 sta->eapol_sm->authSuccess = TRUE;
1168                 sta->eapol_sm->authFail = FALSE;
1169                 sta->eapol_sm->portValid = TRUE;
1170                 if (sta->eapol_sm->eap)
1171                         eap_sm_notify_cached(sta->eapol_sm->eap);
1172                 /* TODO: get vlan_id from R0KH using RRB message */
1173                 return;
1174         }
1175 #endif /* CONFIG_IEEE80211R */
1176
1177         pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
1178         if (pmksa) {
1179                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1180                                HOSTAPD_LEVEL_DEBUG,
1181                                "PMK from PMKSA cache - skip IEEE 802.1X/EAP");
1182                 /* Setup EAPOL state machines to already authenticated state
1183                  * because of existing PMKSA information in the cache. */
1184                 sta->eapol_sm->keyRun = TRUE;
1185                 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
1186                 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
1187                 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
1188                 sta->eapol_sm->authSuccess = TRUE;
1189                 sta->eapol_sm->authFail = FALSE;
1190                 if (sta->eapol_sm->eap)
1191                         eap_sm_notify_cached(sta->eapol_sm->eap);
1192                 pmksa_cache_to_eapol_data(hapd, pmksa, sta->eapol_sm);
1193                 ap_sta_bind_vlan(hapd, sta);
1194         } else {
1195                 if (reassoc) {
1196                         /*
1197                          * Force EAPOL state machines to start
1198                          * re-authentication without having to wait for the
1199                          * Supplicant to send EAPOL-Start.
1200                          */
1201                         sta->eapol_sm->reAuthenticate = TRUE;
1202                 }
1203                 eapol_auth_step(sta->eapol_sm);
1204         }
1205 }
1206
1207
1208 void ieee802_1x_free_station(struct hostapd_data *hapd, struct sta_info *sta)
1209 {
1210         struct eapol_state_machine *sm = sta->eapol_sm;
1211
1212 #ifdef CONFIG_HS20
1213         eloop_cancel_timeout(ieee802_1x_wnm_notif_send, hapd, sta);
1214 #endif /* CONFIG_HS20 */
1215
1216         if (sta->pending_eapol_rx) {
1217                 wpabuf_free(sta->pending_eapol_rx->buf);
1218                 os_free(sta->pending_eapol_rx);
1219                 sta->pending_eapol_rx = NULL;
1220         }
1221
1222         if (sm == NULL)
1223                 return;
1224
1225         sta->eapol_sm = NULL;
1226
1227 #ifndef CONFIG_NO_RADIUS
1228         radius_msg_free(sm->last_recv_radius);
1229         radius_free_class(&sm->radius_class);
1230 #endif /* CONFIG_NO_RADIUS */
1231
1232         eapol_auth_free(sm);
1233 }
1234
1235
1236 #ifndef CONFIG_NO_RADIUS
1237 static void ieee802_1x_decapsulate_radius(struct hostapd_data *hapd,
1238                                           struct sta_info *sta)
1239 {
1240         struct wpabuf *eap;
1241         const struct eap_hdr *hdr;
1242         int eap_type = -1;
1243         char buf[64];
1244         struct radius_msg *msg;
1245         struct eapol_state_machine *sm = sta->eapol_sm;
1246
1247         if (sm == NULL || sm->last_recv_radius == NULL) {
1248                 if (sm)
1249                         sm->eap_if->aaaEapNoReq = TRUE;
1250                 return;
1251         }
1252
1253         msg = sm->last_recv_radius;
1254
1255         eap = radius_msg_get_eap(msg);
1256         if (eap == NULL) {
1257                 /* RFC 3579, Chap. 2.6.3:
1258                  * RADIUS server SHOULD NOT send Access-Reject/no EAP-Message
1259                  * attribute */
1260                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1261                                HOSTAPD_LEVEL_WARNING, "could not extract "
1262                                "EAP-Message from RADIUS message");
1263                 sm->eap_if->aaaEapNoReq = TRUE;
1264                 return;
1265         }
1266
1267         if (wpabuf_len(eap) < sizeof(*hdr)) {
1268                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1269                                HOSTAPD_LEVEL_WARNING, "too short EAP packet "
1270                                "received from authentication server");
1271                 wpabuf_free(eap);
1272                 sm->eap_if->aaaEapNoReq = TRUE;
1273                 return;
1274         }
1275
1276         if (wpabuf_len(eap) > sizeof(*hdr))
1277                 eap_type = (wpabuf_head_u8(eap))[sizeof(*hdr)];
1278
1279         hdr = wpabuf_head(eap);
1280         switch (hdr->code) {
1281         case EAP_CODE_REQUEST:
1282                 if (eap_type >= 0)
1283                         sm->eap_type_authsrv = eap_type;
1284                 os_snprintf(buf, sizeof(buf), "EAP-Request-%s (%d)",
1285                             eap_server_get_name(0, eap_type), eap_type);
1286                 break;
1287         case EAP_CODE_RESPONSE:
1288                 os_snprintf(buf, sizeof(buf), "EAP Response-%s (%d)",
1289                             eap_server_get_name(0, eap_type), eap_type);
1290                 break;
1291         case EAP_CODE_SUCCESS:
1292                 os_strlcpy(buf, "EAP Success", sizeof(buf));
1293                 break;
1294         case EAP_CODE_FAILURE:
1295                 os_strlcpy(buf, "EAP Failure", sizeof(buf));
1296                 break;
1297         default:
1298                 os_strlcpy(buf, "unknown EAP code", sizeof(buf));
1299                 break;
1300         }
1301         buf[sizeof(buf) - 1] = '\0';
1302         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1303                        HOSTAPD_LEVEL_DEBUG, "decapsulated EAP packet (code=%d "
1304                        "id=%d len=%d) from RADIUS server: %s",
1305                        hdr->code, hdr->identifier, be_to_host16(hdr->length),
1306                        buf);
1307         sm->eap_if->aaaEapReq = TRUE;
1308
1309         wpabuf_free(sm->eap_if->aaaEapReqData);
1310         sm->eap_if->aaaEapReqData = eap;
1311 }
1312
1313
1314 static void ieee802_1x_get_keys(struct hostapd_data *hapd,
1315                                 struct sta_info *sta, struct radius_msg *msg,
1316                                 struct radius_msg *req,
1317                                 const u8 *shared_secret,
1318                                 size_t shared_secret_len)
1319 {
1320         struct radius_ms_mppe_keys *keys;
1321         struct eapol_state_machine *sm = sta->eapol_sm;
1322         if (sm == NULL)
1323                 return;
1324
1325         keys = radius_msg_get_ms_keys(msg, req, shared_secret,
1326                                       shared_secret_len);
1327
1328         if (keys && keys->send && keys->recv) {
1329                 size_t len = keys->send_len + keys->recv_len;
1330                 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Send-Key",
1331                                 keys->send, keys->send_len);
1332                 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Recv-Key",
1333                                 keys->recv, keys->recv_len);
1334
1335                 os_free(sm->eap_if->aaaEapKeyData);
1336                 sm->eap_if->aaaEapKeyData = os_malloc(len);
1337                 if (sm->eap_if->aaaEapKeyData) {
1338                         os_memcpy(sm->eap_if->aaaEapKeyData, keys->recv,
1339                                   keys->recv_len);
1340                         os_memcpy(sm->eap_if->aaaEapKeyData + keys->recv_len,
1341                                   keys->send, keys->send_len);
1342                         sm->eap_if->aaaEapKeyDataLen = len;
1343                         sm->eap_if->aaaEapKeyAvailable = TRUE;
1344                 }
1345         } else {
1346                 wpa_printf(MSG_DEBUG,
1347                            "MS-MPPE: 1x_get_keys, could not get keys: %p  send: %p  recv: %p",
1348                            keys, keys ? keys->send : NULL,
1349                            keys ? keys->recv : NULL);
1350         }
1351
1352         if (keys) {
1353                 os_free(keys->send);
1354                 os_free(keys->recv);
1355                 os_free(keys);
1356         }
1357 }
1358
1359
1360 static void ieee802_1x_store_radius_class(struct hostapd_data *hapd,
1361                                           struct sta_info *sta,
1362                                           struct radius_msg *msg)
1363 {
1364         u8 *attr_class;
1365         size_t class_len;
1366         struct eapol_state_machine *sm = sta->eapol_sm;
1367         int count, i;
1368         struct radius_attr_data *nclass;
1369         size_t nclass_count;
1370
1371         if (!hapd->conf->radius->acct_server || hapd->radius == NULL ||
1372             sm == NULL)
1373                 return;
1374
1375         radius_free_class(&sm->radius_class);
1376         count = radius_msg_count_attr(msg, RADIUS_ATTR_CLASS, 1);
1377         if (count <= 0)
1378                 return;
1379
1380         nclass = os_calloc(count, sizeof(struct radius_attr_data));
1381         if (nclass == NULL)
1382                 return;
1383
1384         nclass_count = 0;
1385
1386         attr_class = NULL;
1387         for (i = 0; i < count; i++) {
1388                 do {
1389                         if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CLASS,
1390                                                     &attr_class, &class_len,
1391                                                     attr_class) < 0) {
1392                                 i = count;
1393                                 break;
1394                         }
1395                 } while (class_len < 1);
1396
1397                 nclass[nclass_count].data = os_malloc(class_len);
1398                 if (nclass[nclass_count].data == NULL)
1399                         break;
1400
1401                 os_memcpy(nclass[nclass_count].data, attr_class, class_len);
1402                 nclass[nclass_count].len = class_len;
1403                 nclass_count++;
1404         }
1405
1406         sm->radius_class.attr = nclass;
1407         sm->radius_class.count = nclass_count;
1408         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Stored %lu RADIUS Class "
1409                    "attributes for " MACSTR,
1410                    (unsigned long) sm->radius_class.count,
1411                    MAC2STR(sta->addr));
1412 }
1413
1414
1415 /* Update sta->identity based on User-Name attribute in Access-Accept */
1416 static void ieee802_1x_update_sta_identity(struct hostapd_data *hapd,
1417                                            struct sta_info *sta,
1418                                            struct radius_msg *msg)
1419 {
1420         u8 *buf, *identity;
1421         size_t len;
1422         struct eapol_state_machine *sm = sta->eapol_sm;
1423
1424         if (sm == NULL)
1425                 return;
1426
1427         if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_USER_NAME, &buf, &len,
1428                                     NULL) < 0)
1429                 return;
1430
1431         identity = (u8 *) dup_binstr(buf, len);
1432         if (identity == NULL)
1433                 return;
1434
1435         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1436                        HOSTAPD_LEVEL_DEBUG, "old identity '%s' updated with "
1437                        "User-Name from Access-Accept '%s'",
1438                        sm->identity ? (char *) sm->identity : "N/A",
1439                        (char *) identity);
1440
1441         os_free(sm->identity);
1442         sm->identity = identity;
1443         sm->identity_len = len;
1444 }
1445
1446
1447 /* Update CUI based on Chargeable-User-Identity attribute in Access-Accept */
1448 static void ieee802_1x_update_sta_cui(struct hostapd_data *hapd,
1449                                       struct sta_info *sta,
1450                                       struct radius_msg *msg)
1451 {
1452         struct eapol_state_machine *sm = sta->eapol_sm;
1453         struct wpabuf *cui;
1454         u8 *buf;
1455         size_t len;
1456
1457         if (sm == NULL)
1458                 return;
1459
1460         if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CHARGEABLE_USER_IDENTITY,
1461                                     &buf, &len, NULL) < 0)
1462                 return;
1463
1464         cui = wpabuf_alloc_copy(buf, len);
1465         if (cui == NULL)
1466                 return;
1467
1468         wpabuf_free(sm->radius_cui);
1469         sm->radius_cui = cui;
1470 }
1471
1472
1473 #ifdef CONFIG_HS20
1474
1475 static void ieee802_1x_hs20_sub_rem(struct sta_info *sta, u8 *pos, size_t len)
1476 {
1477         sta->remediation = 1;
1478         os_free(sta->remediation_url);
1479         if (len > 2) {
1480                 sta->remediation_url = os_malloc(len);
1481                 if (!sta->remediation_url)
1482                         return;
1483                 sta->remediation_method = pos[0];
1484                 os_memcpy(sta->remediation_url, pos + 1, len - 1);
1485                 sta->remediation_url[len - 1] = '\0';
1486                 wpa_printf(MSG_DEBUG, "HS 2.0: Subscription remediation needed "
1487                            "for " MACSTR " - server method %u URL %s",
1488                            MAC2STR(sta->addr), sta->remediation_method,
1489                            sta->remediation_url);
1490         } else {
1491                 sta->remediation_url = NULL;
1492                 wpa_printf(MSG_DEBUG, "HS 2.0: Subscription remediation needed "
1493                            "for " MACSTR, MAC2STR(sta->addr));
1494         }
1495         /* TODO: assign the STA into remediation VLAN or add filtering */
1496 }
1497
1498
1499 static void ieee802_1x_hs20_deauth_req(struct hostapd_data *hapd,
1500                                        struct sta_info *sta, u8 *pos,
1501                                        size_t len)
1502 {
1503         if (len < 3)
1504                 return; /* Malformed information */
1505         sta->hs20_deauth_requested = 1;
1506         wpa_printf(MSG_DEBUG, "HS 2.0: Deauthentication request - Code %u  "
1507                    "Re-auth Delay %u",
1508                    *pos, WPA_GET_LE16(pos + 1));
1509         wpabuf_free(sta->hs20_deauth_req);
1510         sta->hs20_deauth_req = wpabuf_alloc(len + 1);
1511         if (sta->hs20_deauth_req) {
1512                 wpabuf_put_data(sta->hs20_deauth_req, pos, 3);
1513                 wpabuf_put_u8(sta->hs20_deauth_req, len - 3);
1514                 wpabuf_put_data(sta->hs20_deauth_req, pos + 3, len - 3);
1515         }
1516         ap_sta_session_timeout(hapd, sta, hapd->conf->hs20_deauth_req_timeout);
1517 }
1518
1519
1520 static void ieee802_1x_hs20_session_info(struct hostapd_data *hapd,
1521                                          struct sta_info *sta, u8 *pos,
1522                                          size_t len, int session_timeout)
1523 {
1524         unsigned int swt;
1525         int warning_time, beacon_int;
1526
1527         if (len < 1)
1528                 return; /* Malformed information */
1529         os_free(sta->hs20_session_info_url);
1530         sta->hs20_session_info_url = os_malloc(len);
1531         if (sta->hs20_session_info_url == NULL)
1532                 return;
1533         swt = pos[0];
1534         os_memcpy(sta->hs20_session_info_url, pos + 1, len - 1);
1535         sta->hs20_session_info_url[len - 1] = '\0';
1536         wpa_printf(MSG_DEBUG, "HS 2.0: Session Information URL='%s' SWT=%u "
1537                    "(session_timeout=%d)",
1538                    sta->hs20_session_info_url, swt, session_timeout);
1539         if (session_timeout < 0) {
1540                 wpa_printf(MSG_DEBUG, "HS 2.0: No Session-Timeout set - ignore session info URL");
1541                 return;
1542         }
1543         if (swt == 255)
1544                 swt = 1; /* Use one minute as the AP selected value */
1545
1546         if ((unsigned int) session_timeout < swt * 60)
1547                 warning_time = 0;
1548         else
1549                 warning_time = session_timeout - swt * 60;
1550
1551         beacon_int = hapd->iconf->beacon_int;
1552         if (beacon_int < 1)
1553                 beacon_int = 100; /* best guess */
1554         sta->hs20_disassoc_timer = swt * 60 * 1000 / beacon_int * 125 / 128;
1555         if (sta->hs20_disassoc_timer > 65535)
1556                 sta->hs20_disassoc_timer = 65535;
1557
1558         ap_sta_session_warning_timeout(hapd, sta, warning_time);
1559 }
1560
1561 #endif /* CONFIG_HS20 */
1562
1563
1564 static void ieee802_1x_check_hs20(struct hostapd_data *hapd,
1565                                   struct sta_info *sta,
1566                                   struct radius_msg *msg,
1567                                   int session_timeout)
1568 {
1569 #ifdef CONFIG_HS20
1570         u8 *buf, *pos, *end, type, sublen;
1571         size_t len;
1572
1573         buf = NULL;
1574         sta->remediation = 0;
1575         sta->hs20_deauth_requested = 0;
1576
1577         for (;;) {
1578                 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_VENDOR_SPECIFIC,
1579                                             &buf, &len, buf) < 0)
1580                         break;
1581                 if (len < 6)
1582                         continue;
1583                 pos = buf;
1584                 end = buf + len;
1585                 if (WPA_GET_BE32(pos) != RADIUS_VENDOR_ID_WFA)
1586                         continue;
1587                 pos += 4;
1588
1589                 type = *pos++;
1590                 sublen = *pos++;
1591                 if (sublen < 2)
1592                         continue; /* invalid length */
1593                 sublen -= 2; /* skip header */
1594                 if (pos + sublen > end)
1595                         continue; /* invalid WFA VSA */
1596
1597                 switch (type) {
1598                 case RADIUS_VENDOR_ATTR_WFA_HS20_SUBSCR_REMEDIATION:
1599                         ieee802_1x_hs20_sub_rem(sta, pos, sublen);
1600                         break;
1601                 case RADIUS_VENDOR_ATTR_WFA_HS20_DEAUTH_REQ:
1602                         ieee802_1x_hs20_deauth_req(hapd, sta, pos, sublen);
1603                         break;
1604                 case RADIUS_VENDOR_ATTR_WFA_HS20_SESSION_INFO_URL:
1605                         ieee802_1x_hs20_session_info(hapd, sta, pos, sublen,
1606                                                      session_timeout);
1607                         break;
1608                 }
1609         }
1610 #endif /* CONFIG_HS20 */
1611 }
1612
1613
1614 struct sta_id_search {
1615         u8 identifier;
1616         struct eapol_state_machine *sm;
1617 };
1618
1619
1620 static int ieee802_1x_select_radius_identifier(struct hostapd_data *hapd,
1621                                                struct sta_info *sta,
1622                                                void *ctx)
1623 {
1624         struct sta_id_search *id_search = ctx;
1625         struct eapol_state_machine *sm = sta->eapol_sm;
1626
1627         if (sm && sm->radius_identifier >= 0 &&
1628             sm->radius_identifier == id_search->identifier) {
1629                 id_search->sm = sm;
1630                 return 1;
1631         }
1632         return 0;
1633 }
1634
1635
1636 static struct eapol_state_machine *
1637 ieee802_1x_search_radius_identifier(struct hostapd_data *hapd, u8 identifier)
1638 {
1639         struct sta_id_search id_search;
1640         id_search.identifier = identifier;
1641         id_search.sm = NULL;
1642         ap_for_each_sta(hapd, ieee802_1x_select_radius_identifier, &id_search);
1643         return id_search.sm;
1644 }
1645
1646
1647 /**
1648  * ieee802_1x_receive_auth - Process RADIUS frames from Authentication Server
1649  * @msg: RADIUS response message
1650  * @req: RADIUS request message
1651  * @shared_secret: RADIUS shared secret
1652  * @shared_secret_len: Length of shared_secret in octets
1653  * @data: Context data (struct hostapd_data *)
1654  * Returns: Processing status
1655  */
1656 static RadiusRxResult
1657 ieee802_1x_receive_auth(struct radius_msg *msg, struct radius_msg *req,
1658                         const u8 *shared_secret, size_t shared_secret_len,
1659                         void *data)
1660 {
1661         struct hostapd_data *hapd = data;
1662         struct sta_info *sta;
1663         u32 session_timeout = 0, termination_action, acct_interim_interval;
1664         int session_timeout_set;
1665         struct eapol_state_machine *sm;
1666         int override_eapReq = 0;
1667         struct radius_hdr *hdr = radius_msg_get_hdr(msg);
1668         struct vlan_description vlan_desc;
1669 #ifndef CONFIG_NO_VLAN
1670         int *untagged, *tagged, *notempty;
1671 #endif /* CONFIG_NO_VLAN */
1672
1673         os_memset(&vlan_desc, 0, sizeof(vlan_desc));
1674
1675         sm = ieee802_1x_search_radius_identifier(hapd, hdr->identifier);
1676         if (sm == NULL) {
1677                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Could not find matching "
1678                            "station for this RADIUS message");
1679                 return RADIUS_RX_UNKNOWN;
1680         }
1681         sta = sm->sta;
1682
1683         /* RFC 2869, Ch. 5.13: valid Message-Authenticator attribute MUST be
1684          * present when packet contains an EAP-Message attribute */
1685         if (hdr->code == RADIUS_CODE_ACCESS_REJECT &&
1686             radius_msg_get_attr(msg, RADIUS_ATTR_MESSAGE_AUTHENTICATOR, NULL,
1687                                 0) < 0 &&
1688             radius_msg_get_attr(msg, RADIUS_ATTR_EAP_MESSAGE, NULL, 0) < 0) {
1689                 wpa_printf(MSG_DEBUG, "Allowing RADIUS Access-Reject without "
1690                            "Message-Authenticator since it does not include "
1691                            "EAP-Message");
1692         } else if (radius_msg_verify(msg, shared_secret, shared_secret_len,
1693                                      req, 1)) {
1694                 wpa_printf(MSG_INFO, "Incoming RADIUS packet did not have correct Message-Authenticator - dropped");
1695                 return RADIUS_RX_INVALID_AUTHENTICATOR;
1696         }
1697
1698         if (hdr->code != RADIUS_CODE_ACCESS_ACCEPT &&
1699             hdr->code != RADIUS_CODE_ACCESS_REJECT &&
1700             hdr->code != RADIUS_CODE_ACCESS_CHALLENGE) {
1701                 wpa_printf(MSG_INFO, "Unknown RADIUS message code");
1702                 return RADIUS_RX_UNKNOWN;
1703         }
1704
1705         sm->radius_identifier = -1;
1706         wpa_printf(MSG_DEBUG, "RADIUS packet matching with station " MACSTR,
1707                    MAC2STR(sta->addr));
1708
1709         radius_msg_free(sm->last_recv_radius);
1710         sm->last_recv_radius = msg;
1711
1712         session_timeout_set =
1713                 !radius_msg_get_attr_int32(msg, RADIUS_ATTR_SESSION_TIMEOUT,
1714                                            &session_timeout);
1715         if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_TERMINATION_ACTION,
1716                                       &termination_action))
1717                 termination_action = RADIUS_TERMINATION_ACTION_DEFAULT;
1718
1719         if (hapd->conf->acct_interim_interval == 0 &&
1720             hdr->code == RADIUS_CODE_ACCESS_ACCEPT &&
1721             radius_msg_get_attr_int32(msg, RADIUS_ATTR_ACCT_INTERIM_INTERVAL,
1722                                       &acct_interim_interval) == 0) {
1723                 if (acct_interim_interval < 60) {
1724                         hostapd_logger(hapd, sta->addr,
1725                                        HOSTAPD_MODULE_IEEE8021X,
1726                                        HOSTAPD_LEVEL_INFO,
1727                                        "ignored too small "
1728                                        "Acct-Interim-Interval %d",
1729                                        acct_interim_interval);
1730                 } else
1731                         sta->acct_interim_interval = acct_interim_interval;
1732         }
1733
1734
1735         switch (hdr->code) {
1736         case RADIUS_CODE_ACCESS_ACCEPT:
1737 #ifndef CONFIG_NO_VLAN
1738                 if (hapd->conf->ssid.dynamic_vlan != DYNAMIC_VLAN_DISABLED) {
1739                         notempty = &vlan_desc.notempty;
1740                         untagged = &vlan_desc.untagged;
1741                         tagged = vlan_desc.tagged;
1742                         *notempty = !!radius_msg_get_vlanid(msg, untagged,
1743                                                             MAX_NUM_TAGGED_VLAN,
1744                                                             tagged);
1745                 }
1746
1747                 if (vlan_desc.notempty &&
1748                     !hostapd_vlan_valid(hapd->conf->vlan, &vlan_desc)) {
1749                         sta->eapol_sm->authFail = TRUE;
1750                         hostapd_logger(hapd, sta->addr,
1751                                        HOSTAPD_MODULE_RADIUS,
1752                                        HOSTAPD_LEVEL_INFO,
1753                                        "Invalid VLAN %d%s received from RADIUS server",
1754                                        vlan_desc.untagged,
1755                                        vlan_desc.tagged[0] ? "+" : "");
1756                         os_memset(&vlan_desc, 0, sizeof(vlan_desc));
1757                         ap_sta_set_vlan(hapd, sta, &vlan_desc);
1758                         break;
1759                 }
1760
1761                 if (hapd->conf->ssid.dynamic_vlan == DYNAMIC_VLAN_REQUIRED &&
1762                     !vlan_desc.notempty) {
1763                         sta->eapol_sm->authFail = TRUE;
1764                         hostapd_logger(hapd, sta->addr,
1765                                        HOSTAPD_MODULE_IEEE8021X,
1766                                        HOSTAPD_LEVEL_INFO, "authentication "
1767                                        "server did not include required VLAN "
1768                                        "ID in Access-Accept");
1769                         break;
1770                 }
1771 #endif /* CONFIG_NO_VLAN */
1772
1773                 if (ap_sta_set_vlan(hapd, sta, &vlan_desc) < 0)
1774                         break;
1775
1776 #ifndef CONFIG_NO_VLAN
1777                 if (sta->vlan_id > 0) {
1778                         hostapd_logger(hapd, sta->addr,
1779                                        HOSTAPD_MODULE_RADIUS,
1780                                        HOSTAPD_LEVEL_INFO,
1781                                        "VLAN ID %d", sta->vlan_id);
1782                 }
1783 #endif /* CONFIG_NO_VLAN */
1784
1785                 if ((sta->flags & WLAN_STA_ASSOC) &&
1786                     ap_sta_bind_vlan(hapd, sta) < 0)
1787                         break;
1788
1789                 sta->session_timeout_set = !!session_timeout_set;
1790                 sta->session_timeout = session_timeout;
1791
1792                 /* RFC 3580, Ch. 3.17 */
1793                 if (session_timeout_set && termination_action ==
1794                     RADIUS_TERMINATION_ACTION_RADIUS_REQUEST) {
1795                         sm->reAuthPeriod = session_timeout;
1796                 } else if (session_timeout_set)
1797                         ap_sta_session_timeout(hapd, sta, session_timeout);
1798
1799                 sm->eap_if->aaaSuccess = TRUE;
1800                 override_eapReq = 1;
1801                 ieee802_1x_get_keys(hapd, sta, msg, req, shared_secret,
1802                                     shared_secret_len);
1803                 ieee802_1x_store_radius_class(hapd, sta, msg);
1804                 ieee802_1x_update_sta_identity(hapd, sta, msg);
1805                 ieee802_1x_update_sta_cui(hapd, sta, msg);
1806                 ieee802_1x_check_hs20(hapd, sta, msg,
1807                                       session_timeout_set ?
1808                                       (int) session_timeout : -1);
1809                 break;
1810         case RADIUS_CODE_ACCESS_REJECT:
1811                 sm->eap_if->aaaFail = TRUE;
1812                 override_eapReq = 1;
1813                 break;
1814         case RADIUS_CODE_ACCESS_CHALLENGE:
1815                 sm->eap_if->aaaEapReq = TRUE;
1816                 if (session_timeout_set) {
1817                         /* RFC 2869, Ch. 2.3.2; RFC 3580, Ch. 3.17 */
1818                         sm->eap_if->aaaMethodTimeout = session_timeout;
1819                         hostapd_logger(hapd, sm->addr,
1820                                        HOSTAPD_MODULE_IEEE8021X,
1821                                        HOSTAPD_LEVEL_DEBUG,
1822                                        "using EAP timeout of %d seconds (from "
1823                                        "RADIUS)",
1824                                        sm->eap_if->aaaMethodTimeout);
1825                 } else {
1826                         /*
1827                          * Use dynamic retransmission behavior per EAP
1828                          * specification.
1829                          */
1830                         sm->eap_if->aaaMethodTimeout = 0;
1831                 }
1832                 break;
1833         }
1834
1835         ieee802_1x_decapsulate_radius(hapd, sta);
1836         if (override_eapReq)
1837                 sm->eap_if->aaaEapReq = FALSE;
1838
1839         eapol_auth_step(sm);
1840
1841         return RADIUS_RX_QUEUED;
1842 }
1843 #endif /* CONFIG_NO_RADIUS */
1844
1845
1846 void ieee802_1x_abort_auth(struct hostapd_data *hapd, struct sta_info *sta)
1847 {
1848         struct eapol_state_machine *sm = sta->eapol_sm;
1849         if (sm == NULL)
1850                 return;
1851
1852         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1853                        HOSTAPD_LEVEL_DEBUG, "aborting authentication");
1854
1855 #ifndef CONFIG_NO_RADIUS
1856         radius_msg_free(sm->last_recv_radius);
1857         sm->last_recv_radius = NULL;
1858 #endif /* CONFIG_NO_RADIUS */
1859
1860         if (sm->eap_if->eapTimeout) {
1861                 /*
1862                  * Disconnect the STA since it did not reply to the last EAP
1863                  * request and we cannot continue EAP processing (EAP-Failure
1864                  * could only be sent if the EAP peer actually replied).
1865                  */
1866                 wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "EAP Timeout, STA " MACSTR,
1867                         MAC2STR(sta->addr));
1868
1869                 sm->eap_if->portEnabled = FALSE;
1870                 ap_sta_disconnect(hapd, sta, sta->addr,
1871                                   WLAN_REASON_PREV_AUTH_NOT_VALID);
1872         }
1873 }
1874
1875
1876 static int ieee802_1x_rekey_broadcast(struct hostapd_data *hapd)
1877 {
1878         struct eapol_authenticator *eapol = hapd->eapol_auth;
1879
1880         if (hapd->conf->default_wep_key_len < 1)
1881                 return 0;
1882
1883         os_free(eapol->default_wep_key);
1884         eapol->default_wep_key = os_malloc(hapd->conf->default_wep_key_len);
1885         if (eapol->default_wep_key == NULL ||
1886             random_get_bytes(eapol->default_wep_key,
1887                              hapd->conf->default_wep_key_len)) {
1888                 wpa_printf(MSG_INFO, "Could not generate random WEP key");
1889                 os_free(eapol->default_wep_key);
1890                 eapol->default_wep_key = NULL;
1891                 return -1;
1892         }
1893
1894         wpa_hexdump_key(MSG_DEBUG, "IEEE 802.1X: New default WEP key",
1895                         eapol->default_wep_key,
1896                         hapd->conf->default_wep_key_len);
1897
1898         return 0;
1899 }
1900
1901
1902 static int ieee802_1x_sta_key_available(struct hostapd_data *hapd,
1903                                         struct sta_info *sta, void *ctx)
1904 {
1905         if (sta->eapol_sm) {
1906                 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
1907                 eapol_auth_step(sta->eapol_sm);
1908         }
1909         return 0;
1910 }
1911
1912
1913 static void ieee802_1x_rekey(void *eloop_ctx, void *timeout_ctx)
1914 {
1915         struct hostapd_data *hapd = eloop_ctx;
1916         struct eapol_authenticator *eapol = hapd->eapol_auth;
1917
1918         if (eapol->default_wep_key_idx >= 3)
1919                 eapol->default_wep_key_idx =
1920                         hapd->conf->individual_wep_key_len > 0 ? 1 : 0;
1921         else
1922                 eapol->default_wep_key_idx++;
1923
1924         wpa_printf(MSG_DEBUG, "IEEE 802.1X: New default WEP key index %d",
1925                    eapol->default_wep_key_idx);
1926
1927         if (ieee802_1x_rekey_broadcast(hapd)) {
1928                 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1929                                HOSTAPD_LEVEL_WARNING, "failed to generate a "
1930                                "new broadcast key");
1931                 os_free(eapol->default_wep_key);
1932                 eapol->default_wep_key = NULL;
1933                 return;
1934         }
1935
1936         /* TODO: Could setup key for RX here, but change default TX keyid only
1937          * after new broadcast key has been sent to all stations. */
1938         if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
1939                                 broadcast_ether_addr,
1940                                 eapol->default_wep_key_idx, 1, NULL, 0,
1941                                 eapol->default_wep_key,
1942                                 hapd->conf->default_wep_key_len)) {
1943                 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1944                                HOSTAPD_LEVEL_WARNING, "failed to configure a "
1945                                "new broadcast key");
1946                 os_free(eapol->default_wep_key);
1947                 eapol->default_wep_key = NULL;
1948                 return;
1949         }
1950
1951         ap_for_each_sta(hapd, ieee802_1x_sta_key_available, NULL);
1952
1953         if (hapd->conf->wep_rekeying_period > 0) {
1954                 eloop_register_timeout(hapd->conf->wep_rekeying_period, 0,
1955                                        ieee802_1x_rekey, hapd, NULL);
1956         }
1957 }
1958
1959
1960 static void ieee802_1x_eapol_send(void *ctx, void *sta_ctx, u8 type,
1961                                   const u8 *data, size_t datalen)
1962 {
1963 #ifdef CONFIG_WPS
1964         struct sta_info *sta = sta_ctx;
1965
1966         if ((sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) ==
1967             WLAN_STA_MAYBE_WPS) {
1968                 const u8 *identity;
1969                 size_t identity_len;
1970                 struct eapol_state_machine *sm = sta->eapol_sm;
1971
1972                 identity = eap_get_identity(sm->eap, &identity_len);
1973                 if (identity &&
1974                     ((identity_len == WSC_ID_ENROLLEE_LEN &&
1975                       os_memcmp(identity, WSC_ID_ENROLLEE,
1976                                 WSC_ID_ENROLLEE_LEN) == 0) ||
1977                      (identity_len == WSC_ID_REGISTRAR_LEN &&
1978                       os_memcmp(identity, WSC_ID_REGISTRAR,
1979                                 WSC_ID_REGISTRAR_LEN) == 0))) {
1980                         wpa_printf(MSG_DEBUG, "WPS: WLAN_STA_MAYBE_WPS -> "
1981                                    "WLAN_STA_WPS");
1982                         sta->flags |= WLAN_STA_WPS;
1983                 }
1984         }
1985 #endif /* CONFIG_WPS */
1986
1987         ieee802_1x_send(ctx, sta_ctx, type, data, datalen);
1988 }
1989
1990
1991 static void ieee802_1x_aaa_send(void *ctx, void *sta_ctx,
1992                                 const u8 *data, size_t datalen)
1993 {
1994 #ifndef CONFIG_NO_RADIUS
1995         struct hostapd_data *hapd = ctx;
1996         struct sta_info *sta = sta_ctx;
1997
1998         ieee802_1x_encapsulate_radius(hapd, sta, data, datalen);
1999 #endif /* CONFIG_NO_RADIUS */
2000 }
2001
2002
2003 static void _ieee802_1x_finished(void *ctx, void *sta_ctx, int success,
2004                                  int preauth, int remediation)
2005 {
2006         struct hostapd_data *hapd = ctx;
2007         struct sta_info *sta = sta_ctx;
2008         if (preauth)
2009                 rsn_preauth_finished(hapd, sta, success);
2010         else
2011                 ieee802_1x_finished(hapd, sta, success, remediation);
2012 }
2013
2014
2015 static int ieee802_1x_get_eap_user(void *ctx, const u8 *identity,
2016                                    size_t identity_len, int phase2,
2017                                    struct eap_user *user)
2018 {
2019         struct hostapd_data *hapd = ctx;
2020         const struct hostapd_eap_user *eap_user;
2021         int i;
2022         int rv = -1;
2023
2024         eap_user = hostapd_get_eap_user(hapd, identity, identity_len, phase2);
2025         if (eap_user == NULL)
2026                 goto out;
2027
2028         os_memset(user, 0, sizeof(*user));
2029         user->phase2 = phase2;
2030         for (i = 0; i < EAP_MAX_METHODS; i++) {
2031                 user->methods[i].vendor = eap_user->methods[i].vendor;
2032                 user->methods[i].method = eap_user->methods[i].method;
2033         }
2034
2035         if (eap_user->password) {
2036                 user->password = os_malloc(eap_user->password_len);
2037                 if (user->password == NULL)
2038                         goto out;
2039                 os_memcpy(user->password, eap_user->password,
2040                           eap_user->password_len);
2041                 user->password_len = eap_user->password_len;
2042                 user->password_hash = eap_user->password_hash;
2043         }
2044         user->force_version = eap_user->force_version;
2045         user->macacl = eap_user->macacl;
2046         user->ttls_auth = eap_user->ttls_auth;
2047         user->remediation = eap_user->remediation;
2048         rv = 0;
2049
2050 out:
2051         if (rv)
2052                 wpa_printf(MSG_DEBUG, "%s: Failed to find user", __func__);
2053
2054         return rv;
2055 }
2056
2057
2058 static int ieee802_1x_sta_entry_alive(void *ctx, const u8 *addr)
2059 {
2060         struct hostapd_data *hapd = ctx;
2061         struct sta_info *sta;
2062         sta = ap_get_sta(hapd, addr);
2063         if (sta == NULL || sta->eapol_sm == NULL)
2064                 return 0;
2065         return 1;
2066 }
2067
2068
2069 static void ieee802_1x_logger(void *ctx, const u8 *addr,
2070                               eapol_logger_level level, const char *txt)
2071 {
2072 #ifndef CONFIG_NO_HOSTAPD_LOGGER
2073         struct hostapd_data *hapd = ctx;
2074         int hlevel;
2075
2076         switch (level) {
2077         case EAPOL_LOGGER_WARNING:
2078                 hlevel = HOSTAPD_LEVEL_WARNING;
2079                 break;
2080         case EAPOL_LOGGER_INFO:
2081                 hlevel = HOSTAPD_LEVEL_INFO;
2082                 break;
2083         case EAPOL_LOGGER_DEBUG:
2084         default:
2085                 hlevel = HOSTAPD_LEVEL_DEBUG;
2086                 break;
2087         }
2088
2089         hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE8021X, hlevel, "%s",
2090                        txt);
2091 #endif /* CONFIG_NO_HOSTAPD_LOGGER */
2092 }
2093
2094
2095 static void ieee802_1x_set_port_authorized(void *ctx, void *sta_ctx,
2096                                            int authorized)
2097 {
2098         struct hostapd_data *hapd = ctx;
2099         struct sta_info *sta = sta_ctx;
2100         ieee802_1x_set_sta_authorized(hapd, sta, authorized);
2101 }
2102
2103
2104 static void _ieee802_1x_abort_auth(void *ctx, void *sta_ctx)
2105 {
2106         struct hostapd_data *hapd = ctx;
2107         struct sta_info *sta = sta_ctx;
2108         ieee802_1x_abort_auth(hapd, sta);
2109 }
2110
2111
2112 static void _ieee802_1x_tx_key(void *ctx, void *sta_ctx)
2113 {
2114 #ifndef CONFIG_FIPS
2115 #ifndef CONFIG_NO_RC4
2116         struct hostapd_data *hapd = ctx;
2117         struct sta_info *sta = sta_ctx;
2118         ieee802_1x_tx_key(hapd, sta);
2119 #endif /* CONFIG_NO_RC4 */
2120 #endif /* CONFIG_FIPS */
2121 }
2122
2123
2124 static void ieee802_1x_eapol_event(void *ctx, void *sta_ctx,
2125                                    enum eapol_event type)
2126 {
2127         /* struct hostapd_data *hapd = ctx; */
2128         struct sta_info *sta = sta_ctx;
2129         switch (type) {
2130         case EAPOL_AUTH_SM_CHANGE:
2131                 wpa_auth_sm_notify(sta->wpa_sm);
2132                 break;
2133         case EAPOL_AUTH_REAUTHENTICATE:
2134                 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
2135                 break;
2136         }
2137 }
2138
2139
2140 #ifdef CONFIG_ERP
2141
2142 static struct eap_server_erp_key *
2143 ieee802_1x_erp_get_key(void *ctx, const char *keyname)
2144 {
2145         struct hostapd_data *hapd = ctx;
2146         struct eap_server_erp_key *erp;
2147
2148         dl_list_for_each(erp, &hapd->erp_keys, struct eap_server_erp_key,
2149                          list) {
2150                 if (os_strcmp(erp->keyname_nai, keyname) == 0)
2151                         return erp;
2152         }
2153
2154         return NULL;
2155 }
2156
2157
2158 static int ieee802_1x_erp_add_key(void *ctx, struct eap_server_erp_key *erp)
2159 {
2160         struct hostapd_data *hapd = ctx;
2161
2162         dl_list_add(&hapd->erp_keys, &erp->list);
2163         return 0;
2164 }
2165
2166 #endif /* CONFIG_ERP */
2167
2168
2169 int ieee802_1x_init(struct hostapd_data *hapd)
2170 {
2171         int i;
2172         struct eapol_auth_config conf;
2173         struct eapol_auth_cb cb;
2174
2175         dl_list_init(&hapd->erp_keys);
2176
2177         os_memset(&conf, 0, sizeof(conf));
2178         conf.ctx = hapd;
2179         conf.eap_reauth_period = hapd->conf->eap_reauth_period;
2180         conf.wpa = hapd->conf->wpa;
2181         conf.individual_wep_key_len = hapd->conf->individual_wep_key_len;
2182         conf.eap_server = hapd->conf->eap_server;
2183         conf.ssl_ctx = hapd->ssl_ctx;
2184         conf.msg_ctx = hapd->msg_ctx;
2185         conf.eap_sim_db_priv = hapd->eap_sim_db_priv;
2186         conf.eap_req_id_text = hapd->conf->eap_req_id_text;
2187         conf.eap_req_id_text_len = hapd->conf->eap_req_id_text_len;
2188         conf.erp_send_reauth_start = hapd->conf->erp_send_reauth_start;
2189         conf.erp_domain = hapd->conf->erp_domain;
2190         conf.erp = hapd->conf->eap_server_erp;
2191         conf.tls_session_lifetime = hapd->conf->tls_session_lifetime;
2192         conf.pac_opaque_encr_key = hapd->conf->pac_opaque_encr_key;
2193         conf.eap_fast_a_id = hapd->conf->eap_fast_a_id;
2194         conf.eap_fast_a_id_len = hapd->conf->eap_fast_a_id_len;
2195         conf.eap_fast_a_id_info = hapd->conf->eap_fast_a_id_info;
2196         conf.eap_fast_prov = hapd->conf->eap_fast_prov;
2197         conf.pac_key_lifetime = hapd->conf->pac_key_lifetime;
2198         conf.pac_key_refresh_time = hapd->conf->pac_key_refresh_time;
2199         conf.eap_sim_aka_result_ind = hapd->conf->eap_sim_aka_result_ind;
2200         conf.tnc = hapd->conf->tnc;
2201         conf.wps = hapd->wps;
2202         conf.fragment_size = hapd->conf->fragment_size;
2203         conf.pwd_group = hapd->conf->pwd_group;
2204         conf.pbc_in_m1 = hapd->conf->pbc_in_m1;
2205         if (hapd->conf->server_id) {
2206                 conf.server_id = (const u8 *) hapd->conf->server_id;
2207                 conf.server_id_len = os_strlen(hapd->conf->server_id);
2208         } else {
2209                 conf.server_id = (const u8 *) "hostapd";
2210                 conf.server_id_len = 7;
2211         }
2212
2213         os_memset(&cb, 0, sizeof(cb));
2214         cb.eapol_send = ieee802_1x_eapol_send;
2215         cb.aaa_send = ieee802_1x_aaa_send;
2216         cb.finished = _ieee802_1x_finished;
2217         cb.get_eap_user = ieee802_1x_get_eap_user;
2218         cb.sta_entry_alive = ieee802_1x_sta_entry_alive;
2219         cb.logger = ieee802_1x_logger;
2220         cb.set_port_authorized = ieee802_1x_set_port_authorized;
2221         cb.abort_auth = _ieee802_1x_abort_auth;
2222         cb.tx_key = _ieee802_1x_tx_key;
2223         cb.eapol_event = ieee802_1x_eapol_event;
2224 #ifdef CONFIG_ERP
2225         cb.erp_get_key = ieee802_1x_erp_get_key;
2226         cb.erp_add_key = ieee802_1x_erp_add_key;
2227 #endif /* CONFIG_ERP */
2228
2229         hapd->eapol_auth = eapol_auth_init(&conf, &cb);
2230         if (hapd->eapol_auth == NULL)
2231                 return -1;
2232
2233         if ((hapd->conf->ieee802_1x || hapd->conf->wpa) &&
2234             hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 1))
2235                 return -1;
2236
2237 #ifndef CONFIG_NO_RADIUS
2238         if (radius_client_register(hapd->radius, RADIUS_AUTH,
2239                                    ieee802_1x_receive_auth, hapd))
2240                 return -1;
2241 #endif /* CONFIG_NO_RADIUS */
2242
2243         if (hapd->conf->default_wep_key_len) {
2244                 for (i = 0; i < 4; i++)
2245                         hostapd_drv_set_key(hapd->conf->iface, hapd,
2246                                             WPA_ALG_NONE, NULL, i, 0, NULL, 0,
2247                                             NULL, 0);
2248
2249                 ieee802_1x_rekey(hapd, NULL);
2250
2251                 if (hapd->eapol_auth->default_wep_key == NULL)
2252                         return -1;
2253         }
2254
2255         return 0;
2256 }
2257
2258
2259 void ieee802_1x_erp_flush(struct hostapd_data *hapd)
2260 {
2261         struct eap_server_erp_key *erp;
2262
2263         while ((erp = dl_list_first(&hapd->erp_keys, struct eap_server_erp_key,
2264                                     list)) != NULL) {
2265                 dl_list_del(&erp->list);
2266                 bin_clear_free(erp, sizeof(*erp));
2267         }
2268 }
2269
2270
2271 void ieee802_1x_deinit(struct hostapd_data *hapd)
2272 {
2273         eloop_cancel_timeout(ieee802_1x_rekey, hapd, NULL);
2274
2275         if (hapd->driver && hapd->drv_priv &&
2276             (hapd->conf->ieee802_1x || hapd->conf->wpa))
2277                 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0);
2278
2279         eapol_auth_deinit(hapd->eapol_auth);
2280         hapd->eapol_auth = NULL;
2281
2282         ieee802_1x_erp_flush(hapd);
2283 }
2284
2285
2286 int ieee802_1x_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
2287                          const u8 *buf, size_t len, int ack)
2288 {
2289         struct ieee80211_hdr *hdr;
2290         u8 *pos;
2291         const unsigned char rfc1042_hdr[ETH_ALEN] =
2292                 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
2293
2294         if (sta == NULL)
2295                 return -1;
2296         if (len < sizeof(*hdr) + sizeof(rfc1042_hdr) + 2)
2297                 return 0;
2298
2299         hdr = (struct ieee80211_hdr *) buf;
2300         pos = (u8 *) (hdr + 1);
2301         if (os_memcmp(pos, rfc1042_hdr, sizeof(rfc1042_hdr)) != 0)
2302                 return 0;
2303         pos += sizeof(rfc1042_hdr);
2304         if (WPA_GET_BE16(pos) != ETH_P_PAE)
2305                 return 0;
2306         pos += 2;
2307
2308         return ieee802_1x_eapol_tx_status(hapd, sta, pos, buf + len - pos,
2309                                           ack);
2310 }
2311
2312
2313 int ieee802_1x_eapol_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
2314                                const u8 *buf, int len, int ack)
2315 {
2316         const struct ieee802_1x_hdr *xhdr =
2317                 (const struct ieee802_1x_hdr *) buf;
2318         const u8 *pos = buf + sizeof(*xhdr);
2319         struct ieee802_1x_eapol_key *key;
2320
2321         if (len < (int) sizeof(*xhdr))
2322                 return 0;
2323         wpa_printf(MSG_DEBUG, "IEEE 802.1X: " MACSTR " TX status - version=%d "
2324                    "type=%d length=%d - ack=%d",
2325                    MAC2STR(sta->addr), xhdr->version, xhdr->type,
2326                    be_to_host16(xhdr->length), ack);
2327
2328         if (xhdr->type != IEEE802_1X_TYPE_EAPOL_KEY)
2329                 return 0;
2330
2331         if (pos + sizeof(struct wpa_eapol_key) <= buf + len) {
2332                 const struct wpa_eapol_key *wpa;
2333                 wpa = (const struct wpa_eapol_key *) pos;
2334                 if (wpa->type == EAPOL_KEY_TYPE_RSN ||
2335                     wpa->type == EAPOL_KEY_TYPE_WPA)
2336                         wpa_auth_eapol_key_tx_status(hapd->wpa_auth,
2337                                                      sta->wpa_sm, ack);
2338         }
2339
2340         /* EAPOL EAP-Packet packets are eventually re-sent by either Supplicant
2341          * or Authenticator state machines, but EAPOL-Key packets are not
2342          * retransmitted in case of failure. Try to re-send failed EAPOL-Key
2343          * packets couple of times because otherwise STA keys become
2344          * unsynchronized with AP. */
2345         if (!ack && pos + sizeof(*key) <= buf + len) {
2346                 key = (struct ieee802_1x_eapol_key *) pos;
2347                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
2348                                HOSTAPD_LEVEL_DEBUG, "did not Ack EAPOL-Key "
2349                                "frame (%scast index=%d)",
2350                                key->key_index & BIT(7) ? "uni" : "broad",
2351                                key->key_index & ~BIT(7));
2352                 /* TODO: re-send EAPOL-Key couple of times (with short delay
2353                  * between them?). If all attempt fail, report error and
2354                  * deauthenticate STA so that it will get new keys when
2355                  * authenticating again (e.g., after returning in range).
2356                  * Separate limit/transmit state needed both for unicast and
2357                  * broadcast keys(?) */
2358         }
2359         /* TODO: could move unicast key configuration from ieee802_1x_tx_key()
2360          * to here and change the key only if the EAPOL-Key packet was Acked.
2361          */
2362
2363         return 1;
2364 }
2365
2366
2367 u8 * ieee802_1x_get_identity(struct eapol_state_machine *sm, size_t *len)
2368 {
2369         if (sm == NULL || sm->identity == NULL)
2370                 return NULL;
2371
2372         *len = sm->identity_len;
2373         return sm->identity;
2374 }
2375
2376
2377 u8 * ieee802_1x_get_radius_class(struct eapol_state_machine *sm, size_t *len,
2378                                  int idx)
2379 {
2380         if (sm == NULL || sm->radius_class.attr == NULL ||
2381             idx >= (int) sm->radius_class.count)
2382                 return NULL;
2383
2384         *len = sm->radius_class.attr[idx].len;
2385         return sm->radius_class.attr[idx].data;
2386 }
2387
2388
2389 struct wpabuf * ieee802_1x_get_radius_cui(struct eapol_state_machine *sm)
2390 {
2391         if (sm == NULL)
2392                 return NULL;
2393         return sm->radius_cui;
2394 }
2395
2396
2397 const u8 * ieee802_1x_get_key(struct eapol_state_machine *sm, size_t *len)
2398 {
2399         *len = 0;
2400         if (sm == NULL)
2401                 return NULL;
2402
2403         *len = sm->eap_if->eapKeyDataLen;
2404         return sm->eap_if->eapKeyData;
2405 }
2406
2407
2408 void ieee802_1x_notify_port_enabled(struct eapol_state_machine *sm,
2409                                     int enabled)
2410 {
2411         if (sm == NULL)
2412                 return;
2413         sm->eap_if->portEnabled = enabled ? TRUE : FALSE;
2414         eapol_auth_step(sm);
2415 }
2416
2417
2418 void ieee802_1x_notify_port_valid(struct eapol_state_machine *sm,
2419                                   int valid)
2420 {
2421         if (sm == NULL)
2422                 return;
2423         sm->portValid = valid ? TRUE : FALSE;
2424         eapol_auth_step(sm);
2425 }
2426
2427
2428 void ieee802_1x_notify_pre_auth(struct eapol_state_machine *sm, int pre_auth)
2429 {
2430         if (sm == NULL)
2431                 return;
2432         if (pre_auth)
2433                 sm->flags |= EAPOL_SM_PREAUTH;
2434         else
2435                 sm->flags &= ~EAPOL_SM_PREAUTH;
2436 }
2437
2438
2439 static const char * bool_txt(Boolean val)
2440 {
2441         return val ? "TRUE" : "FALSE";
2442 }
2443
2444
2445 int ieee802_1x_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
2446 {
2447         /* TODO */
2448         return 0;
2449 }
2450
2451
2452 int ieee802_1x_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
2453                            char *buf, size_t buflen)
2454 {
2455         int len = 0, ret;
2456         struct eapol_state_machine *sm = sta->eapol_sm;
2457         struct os_reltime diff;
2458         const char *name1;
2459         const char *name2;
2460
2461         if (sm == NULL)
2462                 return 0;
2463
2464         ret = os_snprintf(buf + len, buflen - len,
2465                           "dot1xPaePortNumber=%d\n"
2466                           "dot1xPaePortProtocolVersion=%d\n"
2467                           "dot1xPaePortCapabilities=1\n"
2468                           "dot1xPaePortInitialize=%d\n"
2469                           "dot1xPaePortReauthenticate=FALSE\n",
2470                           sta->aid,
2471                           EAPOL_VERSION,
2472                           sm->initialize);
2473         if (os_snprintf_error(buflen - len, ret))
2474                 return len;
2475         len += ret;
2476
2477         /* dot1xAuthConfigTable */
2478         ret = os_snprintf(buf + len, buflen - len,
2479                           "dot1xAuthPaeState=%d\n"
2480                           "dot1xAuthBackendAuthState=%d\n"
2481                           "dot1xAuthAdminControlledDirections=%d\n"
2482                           "dot1xAuthOperControlledDirections=%d\n"
2483                           "dot1xAuthAuthControlledPortStatus=%d\n"
2484                           "dot1xAuthAuthControlledPortControl=%d\n"
2485                           "dot1xAuthQuietPeriod=%u\n"
2486                           "dot1xAuthServerTimeout=%u\n"
2487                           "dot1xAuthReAuthPeriod=%u\n"
2488                           "dot1xAuthReAuthEnabled=%s\n"
2489                           "dot1xAuthKeyTxEnabled=%s\n",
2490                           sm->auth_pae_state + 1,
2491                           sm->be_auth_state + 1,
2492                           sm->adminControlledDirections,
2493                           sm->operControlledDirections,
2494                           sm->authPortStatus,
2495                           sm->portControl,
2496                           sm->quietPeriod,
2497                           sm->serverTimeout,
2498                           sm->reAuthPeriod,
2499                           bool_txt(sm->reAuthEnabled),
2500                           bool_txt(sm->keyTxEnabled));
2501         if (os_snprintf_error(buflen - len, ret))
2502                 return len;
2503         len += ret;
2504
2505         /* dot1xAuthStatsTable */
2506         ret = os_snprintf(buf + len, buflen - len,
2507                           "dot1xAuthEapolFramesRx=%u\n"
2508                           "dot1xAuthEapolFramesTx=%u\n"
2509                           "dot1xAuthEapolStartFramesRx=%u\n"
2510                           "dot1xAuthEapolLogoffFramesRx=%u\n"
2511                           "dot1xAuthEapolRespIdFramesRx=%u\n"
2512                           "dot1xAuthEapolRespFramesRx=%u\n"
2513                           "dot1xAuthEapolReqIdFramesTx=%u\n"
2514                           "dot1xAuthEapolReqFramesTx=%u\n"
2515                           "dot1xAuthInvalidEapolFramesRx=%u\n"
2516                           "dot1xAuthEapLengthErrorFramesRx=%u\n"
2517                           "dot1xAuthLastEapolFrameVersion=%u\n"
2518                           "dot1xAuthLastEapolFrameSource=" MACSTR "\n",
2519                           sm->dot1xAuthEapolFramesRx,
2520                           sm->dot1xAuthEapolFramesTx,
2521                           sm->dot1xAuthEapolStartFramesRx,
2522                           sm->dot1xAuthEapolLogoffFramesRx,
2523                           sm->dot1xAuthEapolRespIdFramesRx,
2524                           sm->dot1xAuthEapolRespFramesRx,
2525                           sm->dot1xAuthEapolReqIdFramesTx,
2526                           sm->dot1xAuthEapolReqFramesTx,
2527                           sm->dot1xAuthInvalidEapolFramesRx,
2528                           sm->dot1xAuthEapLengthErrorFramesRx,
2529                           sm->dot1xAuthLastEapolFrameVersion,
2530                           MAC2STR(sm->addr));
2531         if (os_snprintf_error(buflen - len, ret))
2532                 return len;
2533         len += ret;
2534
2535         /* dot1xAuthDiagTable */
2536         ret = os_snprintf(buf + len, buflen - len,
2537                           "dot1xAuthEntersConnecting=%u\n"
2538                           "dot1xAuthEapLogoffsWhileConnecting=%u\n"
2539                           "dot1xAuthEntersAuthenticating=%u\n"
2540                           "dot1xAuthAuthSuccessesWhileAuthenticating=%u\n"
2541                           "dot1xAuthAuthTimeoutsWhileAuthenticating=%u\n"
2542                           "dot1xAuthAuthFailWhileAuthenticating=%u\n"
2543                           "dot1xAuthAuthEapStartsWhileAuthenticating=%u\n"
2544                           "dot1xAuthAuthEapLogoffWhileAuthenticating=%u\n"
2545                           "dot1xAuthAuthReauthsWhileAuthenticated=%u\n"
2546                           "dot1xAuthAuthEapStartsWhileAuthenticated=%u\n"
2547                           "dot1xAuthAuthEapLogoffWhileAuthenticated=%u\n"
2548                           "dot1xAuthBackendResponses=%u\n"
2549                           "dot1xAuthBackendAccessChallenges=%u\n"
2550                           "dot1xAuthBackendOtherRequestsToSupplicant=%u\n"
2551                           "dot1xAuthBackendAuthSuccesses=%u\n"
2552                           "dot1xAuthBackendAuthFails=%u\n",
2553                           sm->authEntersConnecting,
2554                           sm->authEapLogoffsWhileConnecting,
2555                           sm->authEntersAuthenticating,
2556                           sm->authAuthSuccessesWhileAuthenticating,
2557                           sm->authAuthTimeoutsWhileAuthenticating,
2558                           sm->authAuthFailWhileAuthenticating,
2559                           sm->authAuthEapStartsWhileAuthenticating,
2560                           sm->authAuthEapLogoffWhileAuthenticating,
2561                           sm->authAuthReauthsWhileAuthenticated,
2562                           sm->authAuthEapStartsWhileAuthenticated,
2563                           sm->authAuthEapLogoffWhileAuthenticated,
2564                           sm->backendResponses,
2565                           sm->backendAccessChallenges,
2566                           sm->backendOtherRequestsToSupplicant,
2567                           sm->backendAuthSuccesses,
2568                           sm->backendAuthFails);
2569         if (os_snprintf_error(buflen - len, ret))
2570                 return len;
2571         len += ret;
2572
2573         /* dot1xAuthSessionStatsTable */
2574         os_reltime_age(&sta->acct_session_start, &diff);
2575         ret = os_snprintf(buf + len, buflen - len,
2576                           /* TODO: dot1xAuthSessionOctetsRx */
2577                           /* TODO: dot1xAuthSessionOctetsTx */
2578                           /* TODO: dot1xAuthSessionFramesRx */
2579                           /* TODO: dot1xAuthSessionFramesTx */
2580                           "dot1xAuthSessionId=%016llX\n"
2581                           "dot1xAuthSessionAuthenticMethod=%d\n"
2582                           "dot1xAuthSessionTime=%u\n"
2583                           "dot1xAuthSessionTerminateCause=999\n"
2584                           "dot1xAuthSessionUserName=%s\n",
2585                           (unsigned long long) sta->acct_session_id,
2586                           (wpa_key_mgmt_wpa_ieee8021x(
2587                                    wpa_auth_sta_key_mgmt(sta->wpa_sm))) ?
2588                           1 : 2,
2589                           (unsigned int) diff.sec,
2590                           sm->identity);
2591         if (os_snprintf_error(buflen - len, ret))
2592                 return len;
2593         len += ret;
2594
2595         if (sm->acct_multi_session_id) {
2596                 ret = os_snprintf(buf + len, buflen - len,
2597                                   "authMultiSessionId=%016llX\n",
2598                                   (unsigned long long)
2599                                   sm->acct_multi_session_id);
2600                 if (os_snprintf_error(buflen - len, ret))
2601                         return len;
2602                 len += ret;
2603         }
2604
2605         name1 = eap_server_get_name(0, sm->eap_type_authsrv);
2606         name2 = eap_server_get_name(0, sm->eap_type_supp);
2607         ret = os_snprintf(buf + len, buflen - len,
2608                           "last_eap_type_as=%d (%s)\n"
2609                           "last_eap_type_sta=%d (%s)\n",
2610                           sm->eap_type_authsrv, name1,
2611                           sm->eap_type_supp, name2);
2612         if (os_snprintf_error(buflen - len, ret))
2613                 return len;
2614         len += ret;
2615
2616         return len;
2617 }
2618
2619
2620 #ifdef CONFIG_HS20
2621 static void ieee802_1x_wnm_notif_send(void *eloop_ctx, void *timeout_ctx)
2622 {
2623         struct hostapd_data *hapd = eloop_ctx;
2624         struct sta_info *sta = timeout_ctx;
2625
2626         if (sta->remediation) {
2627                 wpa_printf(MSG_DEBUG, "HS 2.0: Send WNM-Notification to "
2628                            MACSTR " to indicate Subscription Remediation",
2629                            MAC2STR(sta->addr));
2630                 hs20_send_wnm_notification(hapd, sta->addr,
2631                                            sta->remediation_method,
2632                                            sta->remediation_url);
2633                 os_free(sta->remediation_url);
2634                 sta->remediation_url = NULL;
2635         }
2636
2637         if (sta->hs20_deauth_req) {
2638                 wpa_printf(MSG_DEBUG, "HS 2.0: Send WNM-Notification to "
2639                            MACSTR " to indicate imminent deauthentication",
2640                            MAC2STR(sta->addr));
2641                 hs20_send_wnm_notification_deauth_req(hapd, sta->addr,
2642                                                       sta->hs20_deauth_req);
2643         }
2644 }
2645 #endif /* CONFIG_HS20 */
2646
2647
2648 static void ieee802_1x_finished(struct hostapd_data *hapd,
2649                                 struct sta_info *sta, int success,
2650                                 int remediation)
2651 {
2652         const u8 *key;
2653         size_t len;
2654         /* TODO: get PMKLifetime from WPA parameters */
2655         static const int dot11RSNAConfigPMKLifetime = 43200;
2656         unsigned int session_timeout;
2657
2658 #ifdef CONFIG_HS20
2659         if (remediation && !sta->remediation) {
2660                 sta->remediation = 1;
2661                 os_free(sta->remediation_url);
2662                 sta->remediation_url =
2663                         os_strdup(hapd->conf->subscr_remediation_url);
2664                 sta->remediation_method = 1; /* SOAP-XML SPP */
2665         }
2666
2667         if (success && (sta->remediation || sta->hs20_deauth_req)) {
2668                 wpa_printf(MSG_DEBUG, "HS 2.0: Schedule WNM-Notification to "
2669                            MACSTR " in 100 ms", MAC2STR(sta->addr));
2670                 eloop_cancel_timeout(ieee802_1x_wnm_notif_send, hapd, sta);
2671                 eloop_register_timeout(0, 100000, ieee802_1x_wnm_notif_send,
2672                                        hapd, sta);
2673         }
2674 #endif /* CONFIG_HS20 */
2675
2676         key = ieee802_1x_get_key(sta->eapol_sm, &len);
2677         if (sta->session_timeout_set)
2678                 session_timeout = sta->session_timeout;
2679         else
2680                 session_timeout = dot11RSNAConfigPMKLifetime;
2681         if (success && key && len >= PMK_LEN && !sta->remediation &&
2682             !sta->hs20_deauth_requested &&
2683             wpa_auth_pmksa_add(sta->wpa_sm, key, len, session_timeout,
2684                                sta->eapol_sm) == 0) {
2685                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
2686                                HOSTAPD_LEVEL_DEBUG,
2687                                "Added PMKSA cache entry (IEEE 802.1X)");
2688         }
2689
2690         if (!success) {
2691                 /*
2692                  * Many devices require deauthentication after WPS provisioning
2693                  * and some may not be be able to do that themselves, so
2694                  * disconnect the client here. In addition, this may also
2695                  * benefit IEEE 802.1X/EAPOL authentication cases, too since
2696                  * the EAPOL PAE state machine would remain in HELD state for
2697                  * considerable amount of time and some EAP methods, like
2698                  * EAP-FAST with anonymous provisioning, may require another
2699                  * EAPOL authentication to be started to complete connection.
2700                  */
2701                 wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "IEEE 802.1X: Force "
2702                         "disconnection after EAP-Failure");
2703                 /* Add a small sleep to increase likelihood of previously
2704                  * requested EAP-Failure TX getting out before this should the
2705                  * driver reorder operations.
2706                  */
2707                 os_sleep(0, 10000);
2708                 ap_sta_disconnect(hapd, sta, sta->addr,
2709                                   WLAN_REASON_IEEE_802_1X_AUTH_FAILED);
2710                 hostapd_wps_eap_completed(hapd);
2711         }
2712 }