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 static void ieee802_1x_finished(struct hostapd_data *hapd,
  38                                 struct sta_info *sta, int success,
  39                                 int remediation);
  40
  41
  42 static void ieee802_1x_send(struct hostapd_data *hapd, struct sta_info *sta,
  43                             u8 type, const u8 *data, size_t datalen)
  44 {
  45         u8 *buf;
  46         struct ieee802_1x_hdr *xhdr;
  47         size_t len;
  48         int encrypt = 0;
  49
  50         len = sizeof(*xhdr) + datalen;
  51         buf = os_zalloc(len);
  52         if (buf == NULL) {
  53                 wpa_printf(MSG_ERROR, "malloc() failed for "
  54                            "ieee802_1x_send(len=%lu)",
  55                            (unsigned long) len);
  56                 return;
  57         }
  58
  59         xhdr = (struct ieee802_1x_hdr *) buf;
  60         xhdr->version = hapd->conf->eapol_version;
  61         xhdr->type = type;
  62         xhdr->length = host_to_be16(datalen);
  63
  64         if (datalen > 0 && data != NULL)
  65                 os_memcpy(xhdr + 1, data, datalen);
  66
  67         if (wpa_auth_pairwise_set(sta->wpa_sm))
  68                 encrypt = 1;
  69         if (sta->flags & WLAN_STA_PREAUTH) {
  70                 rsn_preauth_send(hapd, sta, buf, len);
  71         } else {
  72                 hostapd_drv_hapd_send_eapol(
  73                         hapd, sta->addr, buf, len,
  74                         encrypt, hostapd_sta_flags_to_drv(sta->flags));
  75         }
  76
  77         os_free(buf);
  78 }
  79
  80
  81 void ieee802_1x_set_sta_authorized(struct hostapd_data *hapd,
  82                                    struct sta_info *sta, int authorized)
  83 {
  84         int res;
  85
  86         if (sta->flags & WLAN_STA_PREAUTH)
  87                 return;
  88
  89         if (authorized) {
  90                 ap_sta_set_authorized(hapd, sta, 1);
  91                 res = hostapd_set_authorized(hapd, sta, 1);
  92                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
  93                                HOSTAPD_LEVEL_DEBUG, "authorizing port");
  94         } else {
  95                 ap_sta_set_authorized(hapd, sta, 0);
  96                 res = hostapd_set_authorized(hapd, sta, 0);
  97                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
  98                                HOSTAPD_LEVEL_DEBUG, "unauthorizing port");
  99         }
 100
 101         if (res && errno != ENOENT) {
 102                 wpa_printf(MSG_DEBUG, "Could not set station " MACSTR
 103                            " flags for kernel driver (errno=%d).",
 104                            MAC2STR(sta->addr), errno);
 105         }
 106
 107         if (authorized) {
 108                 os_get_reltime(&sta->connected_time);
 109                 accounting_sta_start(hapd, sta);
 110         }
 111 }
 112
 113
 114 static void ieee802_1x_tx_key_one(struct hostapd_data *hapd,
 115                                   struct sta_info *sta,
 116                                   int idx, int broadcast,
 117                                   u8 *key_data, size_t key_len)
 118 {
 119         u8 *buf, *ekey;
 120         struct ieee802_1x_hdr *hdr;
 121         struct ieee802_1x_eapol_key *key;
 122         size_t len, ekey_len;
 123         struct eapol_state_machine *sm = sta->eapol_sm;
 124
 125         if (sm == NULL)
 126                 return;
 127
 128         len = sizeof(*key) + key_len;
 129         buf = os_zalloc(sizeof(*hdr) + len);
 130         if (buf == NULL)
 131                 return;
 132
 133         hdr = (struct ieee802_1x_hdr *) buf;
 134         key = (struct ieee802_1x_eapol_key *) (hdr + 1);
 135         key->type = EAPOL_KEY_TYPE_RC4;
 136         WPA_PUT_BE16(key->key_length, key_len);
 137         wpa_get_ntp_timestamp(key->replay_counter);
 138
 139         if (random_get_bytes(key->key_iv, sizeof(key->key_iv))) {
 140                 wpa_printf(MSG_ERROR, "Could not get random numbers");
 141                 os_free(buf);
 142                 return;
 143         }
 144
 145         key->key_index = idx | (broadcast ? 0 : BIT(7));
 146         if (hapd->conf->eapol_key_index_workaround) {
 147                 /* According to some information, WinXP Supplicant seems to
 148                  * interpret bit7 as an indication whether the key is to be
 149                  * activated, so make it possible to enable workaround that
 150                  * sets this bit for all keys. */
 151                 key->key_index |= BIT(7);
 152         }
 153
 154         /* Key is encrypted using "Key-IV + MSK[0..31]" as the RC4-key and
 155          * MSK[32..63] is used to sign the message. */
 156         if (sm->eap_if->eapKeyData == NULL || sm->eap_if->eapKeyDataLen < 64) {
 157                 wpa_printf(MSG_ERROR, "No eapKeyData available for encrypting "
 158                            "and signing EAPOL-Key");
 159                 os_free(buf);
 160                 return;
 161         }
 162         os_memcpy((u8 *) (key + 1), key_data, key_len);
 163         ekey_len = sizeof(key->key_iv) + 32;
 164         ekey = os_malloc(ekey_len);
 165         if (ekey == NULL) {
 166                 wpa_printf(MSG_ERROR, "Could not encrypt key");
 167                 os_free(buf);
 168                 return;
 169         }
 170         os_memcpy(ekey, key->key_iv, sizeof(key->key_iv));
 171         os_memcpy(ekey + sizeof(key->key_iv), sm->eap_if->eapKeyData, 32);
 172         rc4_skip(ekey, ekey_len, 0, (u8 *) (key + 1), key_len);
 173         os_free(ekey);
 174
 175         /* This header is needed here for HMAC-MD5, but it will be regenerated
 176          * in ieee802_1x_send() */
 177         hdr->version = hapd->conf->eapol_version;
 178         hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
 179         hdr->length = host_to_be16(len);
 180         hmac_md5(sm->eap_if->eapKeyData + 32, 32, buf, sizeof(*hdr) + len,
 181                  key->key_signature);
 182
 183         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key to " MACSTR
 184                    " (%s index=%d)", MAC2STR(sm->addr),
 185                    broadcast ? "broadcast" : "unicast", idx);
 186         ieee802_1x_send(hapd, sta, IEEE802_1X_TYPE_EAPOL_KEY, (u8 *) key, len);
 187         if (sta->eapol_sm)
 188                 sta->eapol_sm->dot1xAuthEapolFramesTx++;
 189         os_free(buf);
 190 }
 191
 192
 193 void ieee802_1x_tx_key(struct hostapd_data *hapd, struct sta_info *sta)
 194 {
 195         struct eapol_authenticator *eapol = hapd->eapol_auth;
 196         struct eapol_state_machine *sm = sta->eapol_sm;
 197
 198         if (sm == NULL || !sm->eap_if->eapKeyData)
 199                 return;
 200
 201         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key(s) to " MACSTR,
 202                    MAC2STR(sta->addr));
 203
 204 #ifndef CONFIG_NO_VLAN
 205         if (sta->vlan_id > 0 && sta->vlan_id <= MAX_VLAN_ID) {
 206                 wpa_printf(MSG_ERROR, "Using WEP with vlans is not supported.");
 207                 return;
 208         }
 209 #endif /* CONFIG_NO_VLAN */
 210
 211         if (eapol->default_wep_key) {
 212                 ieee802_1x_tx_key_one(hapd, sta, eapol->default_wep_key_idx, 1,
 213                                       eapol->default_wep_key,
 214                                       hapd->conf->default_wep_key_len);
 215         }
 216
 217         if (hapd->conf->individual_wep_key_len > 0) {
 218                 u8 *ikey;
 219                 ikey = os_malloc(hapd->conf->individual_wep_key_len);
 220                 if (ikey == NULL ||
 221                     random_get_bytes(ikey, hapd->conf->individual_wep_key_len))
 222                 {
 223                         wpa_printf(MSG_ERROR, "Could not generate random "
 224                                    "individual WEP key.");
 225                         os_free(ikey);
 226                         return;
 227                 }
 228
 229                 wpa_hexdump_key(MSG_DEBUG, "Individual WEP key",
 230                                 ikey, hapd->conf->individual_wep_key_len);
 231
 232                 ieee802_1x_tx_key_one(hapd, sta, 0, 0, ikey,
 233                                       hapd->conf->individual_wep_key_len);
 234
 235                 /* TODO: set encryption in TX callback, i.e., only after STA
 236                  * has ACKed EAPOL-Key frame */
 237                 if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
 238                                         sta->addr, 0, 1, NULL, 0, ikey,
 239                                         hapd->conf->individual_wep_key_len)) {
 240                         wpa_printf(MSG_ERROR, "Could not set individual WEP "
 241                                    "encryption.");
 242                 }
 243
 244                 os_free(ikey);
 245         }
 246 }
 247
 248
 249 const char *radius_mode_txt(struct hostapd_data *hapd)
 250 {
 251         switch (hapd->iface->conf->hw_mode) {
 252         case HOSTAPD_MODE_IEEE80211AD:
 253                 return "802.11ad";
 254         case HOSTAPD_MODE_IEEE80211A:
 255                 return "802.11a";
 256         case HOSTAPD_MODE_IEEE80211G:
 257                 return "802.11g";
 258         case HOSTAPD_MODE_IEEE80211B:
 259         default:
 260                 return "802.11b";
 261         }
 262 }
 263
 264
 265 int radius_sta_rate(struct hostapd_data *hapd, struct sta_info *sta)
 266 {
 267         int i;
 268         u8 rate = 0;
 269
 270         for (i = 0; i < sta->supported_rates_len; i++)
 271                 if ((sta->supported_rates[i] & 0x7f) > rate)
 272                         rate = sta->supported_rates[i] & 0x7f;
 273
 274         return rate;
 275 }
 276
 277
 278 #ifndef CONFIG_NO_RADIUS
 279 static void ieee802_1x_learn_identity(struct hostapd_data *hapd,
 280                                       struct eapol_state_machine *sm,
 281                                       const u8 *eap, size_t len)
 282 {
 283         const u8 *identity;
 284         size_t identity_len;
 285
 286         if (len <= sizeof(struct eap_hdr) ||
 287             eap[sizeof(struct eap_hdr)] != EAP_TYPE_IDENTITY)
 288                 return;
 289
 290         identity = eap_get_identity(sm->eap, &identity_len);
 291         if (identity == NULL)
 292                 return;
 293
 294         /* Save station identity for future RADIUS packets */
 295         os_free(sm->identity);
 296         sm->identity = (u8 *) dup_binstr(identity, identity_len);
 297         if (sm->identity == NULL) {
 298                 sm->identity_len = 0;
 299                 return;
 300         }
 301
 302         sm->identity_len = identity_len;
 303         hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
 304                        HOSTAPD_LEVEL_DEBUG, "STA identity '%s'", sm->identity);
 305         sm->dot1xAuthEapolRespIdFramesRx++;
 306 }
 307
 308
 309 static int add_common_radius_sta_attr_rsn(struct hostapd_data *hapd,
 310                                           struct hostapd_radius_attr *req_attr,
 311                                           struct sta_info *sta,
 312                                           struct radius_msg *msg)
 313 {
 314         u32 suite;
 315         int ver, val;
 316
 317         ver = wpa_auth_sta_wpa_version(sta->wpa_sm);
 318         val = wpa_auth_get_pairwise(sta->wpa_sm);
 319         suite = wpa_cipher_to_suite(ver, val);
 320         if (val != -1 &&
 321             !hostapd_config_get_radius_attr(req_attr,
 322                                             RADIUS_ATTR_WLAN_PAIRWISE_CIPHER) &&
 323             !radius_msg_add_attr_int32(msg, RADIUS_ATTR_WLAN_PAIRWISE_CIPHER,
 324                                        suite)) {
 325                 wpa_printf(MSG_ERROR, "Could not add WLAN-Pairwise-Cipher");
 326                 return -1;
 327         }
 328
 329         suite = wpa_cipher_to_suite((hapd->conf->wpa & 0x2) ?
 330                                     WPA_PROTO_RSN : WPA_PROTO_WPA,
 331                                     hapd->conf->wpa_group);
 332         if (!hostapd_config_get_radius_attr(req_attr,
 333                                             RADIUS_ATTR_WLAN_GROUP_CIPHER) &&
 334             !radius_msg_add_attr_int32(msg, RADIUS_ATTR_WLAN_GROUP_CIPHER,
 335                                        suite)) {
 336                 wpa_printf(MSG_ERROR, "Could not add WLAN-Group-Cipher");
 337                 return -1;
 338         }
 339
 340         val = wpa_auth_sta_key_mgmt(sta->wpa_sm);
 341         suite = wpa_akm_to_suite(val);
 342         if (val != -1 &&
 343             !hostapd_config_get_radius_attr(req_attr,
 344                                             RADIUS_ATTR_WLAN_AKM_SUITE) &&
 345             !radius_msg_add_attr_int32(msg, RADIUS_ATTR_WLAN_AKM_SUITE,
 346                                        suite)) {
 347                 wpa_printf(MSG_ERROR, "Could not add WLAN-AKM-Suite");
 348                 return -1;
 349         }
 350
 351 #ifdef CONFIG_IEEE80211W
 352         if (hapd->conf->ieee80211w != NO_MGMT_FRAME_PROTECTION) {
 353                 suite = wpa_cipher_to_suite(WPA_PROTO_RSN,
 354                                             hapd->conf->group_mgmt_cipher);
 355                 if (!hostapd_config_get_radius_attr(
 356                             req_attr, RADIUS_ATTR_WLAN_GROUP_MGMT_CIPHER) &&
 357                     !radius_msg_add_attr_int32(
 358                             msg, RADIUS_ATTR_WLAN_GROUP_MGMT_CIPHER, suite)) {
 359                         wpa_printf(MSG_ERROR,
 360                                    "Could not add WLAN-Group-Mgmt-Cipher");
 361                         return -1;
 362                 }
 363         }
 364 #endif /* CONFIG_IEEE80211W */
 365
 366         return 0;
 367 }
 368
 369
 370 static int add_common_radius_sta_attr(struct hostapd_data *hapd,
 371                                       struct hostapd_radius_attr *req_attr,
 372                                       struct sta_info *sta,
 373                                       struct radius_msg *msg)
 374 {
 375         char buf[128];
 376
 377         if (!hostapd_config_get_radius_attr(req_attr,
 378                                             RADIUS_ATTR_NAS_PORT) &&
 379             !radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT, sta->aid)) {
 380                 wpa_printf(MSG_ERROR, "Could not add NAS-Port");
 381                 return -1;
 382         }
 383
 384         os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
 385                     MAC2STR(sta->addr));
 386         buf[sizeof(buf) - 1] = '\0';
 387         if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID,
 388                                  (u8 *) buf, os_strlen(buf))) {
 389                 wpa_printf(MSG_ERROR, "Could not add Calling-Station-Id");
 390                 return -1;
 391         }
 392
 393         if (sta->flags & WLAN_STA_PREAUTH) {
 394                 os_strlcpy(buf, "IEEE 802.11i Pre-Authentication",
 395                            sizeof(buf));
 396         } else {
 397                 os_snprintf(buf, sizeof(buf), "CONNECT %d%sMbps %s",
 398                             radius_sta_rate(hapd, sta) / 2,
 399                             (radius_sta_rate(hapd, sta) & 1) ? ".5" : "",
 400                             radius_mode_txt(hapd));
 401                 buf[sizeof(buf) - 1] = '\0';
 402         }
 403         if (!hostapd_config_get_radius_attr(req_attr,
 404                                             RADIUS_ATTR_CONNECT_INFO) &&
 405             !radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO,
 406                                  (u8 *) buf, os_strlen(buf))) {
 407                 wpa_printf(MSG_ERROR, "Could not add Connect-Info");
 408                 return -1;
 409         }
 410
 411         if (sta->acct_session_id_hi || sta->acct_session_id_lo) {
 412                 os_snprintf(buf, sizeof(buf), "%08X-%08X",
 413                             sta->acct_session_id_hi, sta->acct_session_id_lo);
 414                 if (!radius_msg_add_attr(msg, RADIUS_ATTR_ACCT_SESSION_ID,
 415                                          (u8 *) buf, os_strlen(buf))) {
 416                         wpa_printf(MSG_ERROR, "Could not add Acct-Session-Id");
 417                         return -1;
 418                 }
 419         }
 420
 421 #ifdef CONFIG_IEEE80211R
 422         if (hapd->conf->wpa && wpa_key_mgmt_ft(hapd->conf->wpa_key_mgmt) &&
 423             sta->wpa_sm &&
 424             (wpa_key_mgmt_ft(wpa_auth_sta_key_mgmt(sta->wpa_sm)) ||
 425              sta->auth_alg == WLAN_AUTH_FT) &&
 426             !hostapd_config_get_radius_attr(req_attr,
 427                                             RADIUS_ATTR_MOBILITY_DOMAIN_ID) &&
 428             !radius_msg_add_attr_int32(msg, RADIUS_ATTR_MOBILITY_DOMAIN_ID,
 429                                        WPA_GET_BE16(
 430                                                hapd->conf->mobility_domain))) {
 431                 wpa_printf(MSG_ERROR, "Could not add Mobility-Domain-Id");
 432                 return -1;
 433         }
 434 #endif /* CONFIG_IEEE80211R */
 435
 436         if (hapd->conf->wpa && sta->wpa_sm &&
 437             add_common_radius_sta_attr_rsn(hapd, req_attr, sta, msg) < 0)
 438                 return -1;
 439
 440         return 0;
 441 }
 442
 443
 444 int add_common_radius_attr(struct hostapd_data *hapd,
 445                            struct hostapd_radius_attr *req_attr,
 446                            struct sta_info *sta,
 447                            struct radius_msg *msg)
 448 {
 449         char buf[128];
 450         struct hostapd_radius_attr *attr;
 451
 452         if (!hostapd_config_get_radius_attr(req_attr,
 453                                             RADIUS_ATTR_NAS_IP_ADDRESS) &&
 454             hapd->conf->own_ip_addr.af == AF_INET &&
 455             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS,
 456                                  (u8 *) &hapd->conf->own_ip_addr.u.v4, 4)) {
 457                 wpa_printf(MSG_ERROR, "Could not add NAS-IP-Address");
 458                 return -1;
 459         }
 460
 461 #ifdef CONFIG_IPV6
 462         if (!hostapd_config_get_radius_attr(req_attr,
 463                                             RADIUS_ATTR_NAS_IPV6_ADDRESS) &&
 464             hapd->conf->own_ip_addr.af == AF_INET6 &&
 465             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IPV6_ADDRESS,
 466                                  (u8 *) &hapd->conf->own_ip_addr.u.v6, 16)) {
 467                 wpa_printf(MSG_ERROR, "Could not add NAS-IPv6-Address");
 468                 return -1;
 469         }
 470 #endif /* CONFIG_IPV6 */
 471
 472         if (!hostapd_config_get_radius_attr(req_attr,
 473                                             RADIUS_ATTR_NAS_IDENTIFIER) &&
 474             hapd->conf->nas_identifier &&
 475             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IDENTIFIER,
 476                                  (u8 *) hapd->conf->nas_identifier,
 477                                  os_strlen(hapd->conf->nas_identifier))) {
 478                 wpa_printf(MSG_ERROR, "Could not add NAS-Identifier");
 479                 return -1;
 480         }
 481
 482         os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT ":%s",
 483                     MAC2STR(hapd->own_addr),
 484                     wpa_ssid_txt(hapd->conf->ssid.ssid,
 485                                  hapd->conf->ssid.ssid_len));
 486         buf[sizeof(buf) - 1] = '\0';
 487         if (!hostapd_config_get_radius_attr(req_attr,
 488                                             RADIUS_ATTR_CALLED_STATION_ID) &&
 489             !radius_msg_add_attr(msg, RADIUS_ATTR_CALLED_STATION_ID,
 490                                  (u8 *) buf, os_strlen(buf))) {
 491                 wpa_printf(MSG_ERROR, "Could not add Called-Station-Id");
 492                 return -1;
 493         }
 494
 495         if (!hostapd_config_get_radius_attr(req_attr,
 496                                             RADIUS_ATTR_NAS_PORT_TYPE) &&
 497             !radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT_TYPE,
 498                                        RADIUS_NAS_PORT_TYPE_IEEE_802_11)) {
 499                 wpa_printf(MSG_ERROR, "Could not add NAS-Port-Type");
 500                 return -1;
 501         }
 502
 503 #ifdef CONFIG_INTERWORKING
 504         if (hapd->conf->interworking &&
 505             !is_zero_ether_addr(hapd->conf->hessid)) {
 506                 os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
 507                             MAC2STR(hapd->conf->hessid));
 508                 buf[sizeof(buf) - 1] = '\0';
 509                 if (!hostapd_config_get_radius_attr(req_attr,
 510                                                     RADIUS_ATTR_WLAN_HESSID) &&
 511                     !radius_msg_add_attr(msg, RADIUS_ATTR_WLAN_HESSID,
 512                                          (u8 *) buf, os_strlen(buf))) {
 513                         wpa_printf(MSG_ERROR, "Could not add WLAN-HESSID");
 514                         return -1;
 515                 }
 516         }
 517 #endif /* CONFIG_INTERWORKING */
 518
 519         if (sta && add_common_radius_sta_attr(hapd, req_attr, sta, msg) < 0)
 520                 return -1;
 521
 522         for (attr = req_attr; attr; attr = attr->next) {
 523                 if (!radius_msg_add_attr(msg, attr->type,
 524                                          wpabuf_head(attr->val),
 525                                          wpabuf_len(attr->val))) {
 526                         wpa_printf(MSG_ERROR, "Could not add RADIUS "
 527                                    "attribute");
 528                         return -1;
 529                 }
 530         }
 531
 532         return 0;
 533 }
 534
 535
 536 static void ieee802_1x_encapsulate_radius(struct hostapd_data *hapd,
 537                                           struct sta_info *sta,
 538                                           const u8 *eap, size_t len)
 539 {
 540         struct radius_msg *msg;
 541         struct eapol_state_machine *sm = sta->eapol_sm;
 542
 543         if (sm == NULL)
 544                 return;
 545
 546         ieee802_1x_learn_identity(hapd, sm, eap, len);
 547
 548         wpa_printf(MSG_DEBUG, "Encapsulating EAP message into a RADIUS "
 549                    "packet");
 550
 551         sm->radius_identifier = radius_client_get_id(hapd->radius);
 552         msg = radius_msg_new(RADIUS_CODE_ACCESS_REQUEST,
 553                              sm->radius_identifier);
 554         if (msg == NULL) {
 555                 wpa_printf(MSG_INFO, "Could not create new RADIUS packet");
 556                 return;
 557         }
 558
 559         radius_msg_make_authenticator(msg, (u8 *) sta, sizeof(*sta));
 560
 561         if (sm->identity &&
 562             !radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME,
 563                                  sm->identity, sm->identity_len)) {
 564                 wpa_printf(MSG_INFO, "Could not add User-Name");
 565                 goto fail;
 566         }
 567
 568         if (add_common_radius_attr(hapd, hapd->conf->radius_auth_req_attr, sta,
 569                                    msg) < 0)
 570                 goto fail;
 571
 572         /* TODO: should probably check MTU from driver config; 2304 is max for
 573          * IEEE 802.11, but use 1400 to avoid problems with too large packets
 574          */
 575         if (!hostapd_config_get_radius_attr(hapd->conf->radius_auth_req_attr,
 576                                             RADIUS_ATTR_FRAMED_MTU) &&
 577             !radius_msg_add_attr_int32(msg, RADIUS_ATTR_FRAMED_MTU, 1400)) {
 578                 wpa_printf(MSG_INFO, "Could not add Framed-MTU");
 579                 goto fail;
 580         }
 581
 582         if (eap && !radius_msg_add_eap(msg, eap, len)) {
 583                 wpa_printf(MSG_INFO, "Could not add EAP-Message");
 584                 goto fail;
 585         }
 586
 587         /* State attribute must be copied if and only if this packet is
 588          * Access-Request reply to the previous Access-Challenge */
 589         if (sm->last_recv_radius &&
 590             radius_msg_get_hdr(sm->last_recv_radius)->code ==
 591             RADIUS_CODE_ACCESS_CHALLENGE) {
 592                 int res = radius_msg_copy_attr(msg, sm->last_recv_radius,
 593                                                RADIUS_ATTR_STATE);
 594                 if (res < 0) {
 595                         wpa_printf(MSG_INFO, "Could not copy State attribute from previous Access-Challenge");
 596                         goto fail;
 597                 }
 598                 if (res > 0) {
 599                         wpa_printf(MSG_DEBUG, "Copied RADIUS State Attribute");
 600                 }
 601         }
 602
 603         if (hapd->conf->radius_request_cui) {
 604                 const u8 *cui;
 605                 size_t cui_len;
 606                 /* Add previously learned CUI or nul CUI to request CUI */
 607                 if (sm->radius_cui) {
 608                         cui = wpabuf_head(sm->radius_cui);
 609                         cui_len = wpabuf_len(sm->radius_cui);
 610                 } else {
 611                         cui = (const u8 *) "\0";
 612                         cui_len = 1;
 613                 }
 614                 if (!radius_msg_add_attr(msg,
 615                                          RADIUS_ATTR_CHARGEABLE_USER_IDENTITY,
 616                                          cui, cui_len)) {
 617                         wpa_printf(MSG_ERROR, "Could not add CUI");
 618                         goto fail;
 619                 }
 620         }
 621
 622 #ifdef CONFIG_HS20
 623         if (hapd->conf->hs20) {
 624                 u8 ver = 1; /* Release 2 */
 625                 if (!radius_msg_add_wfa(
 626                             msg, RADIUS_VENDOR_ATTR_WFA_HS20_AP_VERSION,
 627                             &ver, 1)) {
 628                         wpa_printf(MSG_ERROR, "Could not add HS 2.0 AP "
 629                                    "version");
 630                         goto fail;
 631                 }
 632
 633                 if (sta->hs20_ie && wpabuf_len(sta->hs20_ie) > 0) {
 634                         const u8 *pos;
 635                         u8 buf[3];
 636                         u16 id;
 637                         pos = wpabuf_head_u8(sta->hs20_ie);
 638                         buf[0] = (*pos) >> 4;
 639                         if (((*pos) & HS20_PPS_MO_ID_PRESENT) &&
 640                             wpabuf_len(sta->hs20_ie) >= 3)
 641                                 id = WPA_GET_LE16(pos + 1);
 642                         else
 643                                 id = 0;
 644                         WPA_PUT_BE16(buf + 1, id);
 645                         if (!radius_msg_add_wfa(
 646                                     msg,
 647                                     RADIUS_VENDOR_ATTR_WFA_HS20_STA_VERSION,
 648                                     buf, sizeof(buf))) {
 649                                 wpa_printf(MSG_ERROR, "Could not add HS 2.0 "
 650                                            "STA version");
 651                                 goto fail;
 652                         }
 653                 }
 654         }
 655 #endif /* CONFIG_HS20 */
 656
 657         if (radius_client_send(hapd->radius, msg, RADIUS_AUTH, sta->addr) < 0)
 658                 goto fail;
 659
 660         return;
 661
 662  fail:
 663         radius_msg_free(msg);
 664 }
 665 #endif /* CONFIG_NO_RADIUS */
 666
 667
 668 static void handle_eap_response(struct hostapd_data *hapd,
 669                                 struct sta_info *sta, struct eap_hdr *eap,
 670                                 size_t len)
 671 {
 672         u8 type, *data;
 673         struct eapol_state_machine *sm = sta->eapol_sm;
 674         if (sm == NULL)
 675                 return;
 676
 677         data = (u8 *) (eap + 1);
 678
 679         if (len < sizeof(*eap) + 1) {
 680                 wpa_printf(MSG_INFO, "handle_eap_response: too short response data");
 681                 return;
 682         }
 683
 684         sm->eap_type_supp = type = data[0];
 685
 686         hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
 687                        HOSTAPD_LEVEL_DEBUG, "received EAP packet (code=%d "
 688                        "id=%d len=%d) from STA: EAP Response-%s (%d)",
 689                        eap->code, eap->identifier, be_to_host16(eap->length),
 690                        eap_server_get_name(0, type), type);
 691
 692         sm->dot1xAuthEapolRespFramesRx++;
 693
 694         wpabuf_free(sm->eap_if->eapRespData);
 695         sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len);
 696         sm->eapolEap = TRUE;
 697 }
 698
 699
 700 /* Process incoming EAP packet from Supplicant */
 701 static void handle_eap(struct hostapd_data *hapd, struct sta_info *sta,
 702                        u8 *buf, size_t len)
 703 {
 704         struct eap_hdr *eap;
 705         u16 eap_len;
 706
 707         if (len < sizeof(*eap)) {
 708                 wpa_printf(MSG_INFO, "   too short EAP packet");
 709                 return;
 710         }
 711
 712         eap = (struct eap_hdr *) buf;
 713
 714         eap_len = be_to_host16(eap->length);
 715         wpa_printf(MSG_DEBUG, "EAP: code=%d identifier=%d length=%d",
 716                    eap->code, eap->identifier, eap_len);
 717         if (eap_len < sizeof(*eap)) {
 718                 wpa_printf(MSG_DEBUG, "   Invalid EAP length");
 719                 return;
 720         } else if (eap_len > len) {
 721                 wpa_printf(MSG_DEBUG, "   Too short frame to contain this EAP "
 722                            "packet");
 723                 return;
 724         } else if (eap_len < len) {
 725                 wpa_printf(MSG_DEBUG, "   Ignoring %lu extra bytes after EAP "
 726                            "packet", (unsigned long) len - eap_len);
 727         }
 728
 729         switch (eap->code) {
 730         case EAP_CODE_REQUEST:
 731                 wpa_printf(MSG_DEBUG, " (request)");
 732                 return;
 733         case EAP_CODE_RESPONSE:
 734                 wpa_printf(MSG_DEBUG, " (response)");
 735                 handle_eap_response(hapd, sta, eap, eap_len);
 736                 break;
 737         case EAP_CODE_SUCCESS:
 738                 wpa_printf(MSG_DEBUG, " (success)");
 739                 return;
 740         case EAP_CODE_FAILURE:
 741                 wpa_printf(MSG_DEBUG, " (failure)");
 742                 return;
 743         default:
 744                 wpa_printf(MSG_DEBUG, " (unknown code)");
 745                 return;
 746         }
 747 }
 748
 749
 750 static struct eapol_state_machine *
 751 ieee802_1x_alloc_eapol_sm(struct hostapd_data *hapd, struct sta_info *sta)
 752 {
 753         int flags = 0;
 754         if (sta->flags & WLAN_STA_PREAUTH)
 755                 flags |= EAPOL_SM_PREAUTH;
 756         if (sta->wpa_sm) {
 757                 flags |= EAPOL_SM_USES_WPA;
 758                 if (wpa_auth_sta_get_pmksa(sta->wpa_sm))
 759                         flags |= EAPOL_SM_FROM_PMKSA_CACHE;
 760         }
 761         return eapol_auth_alloc(hapd->eapol_auth, sta->addr, flags,
 762                                 sta->wps_ie, sta->p2p_ie, sta,
 763                                 sta->identity, sta->radius_cui);
 764 }
 765
 766
 767 /**
 768  * ieee802_1x_receive - Process the EAPOL frames from the Supplicant
 769  * @hapd: hostapd BSS data
 770  * @sa: Source address (sender of the EAPOL frame)
 771  * @buf: EAPOL frame
 772  * @len: Length of buf in octets
 773  *
 774  * This function is called for each incoming EAPOL frame from the interface
 775  */
 776 void ieee802_1x_receive(struct hostapd_data *hapd, const u8 *sa, const u8 *buf,
 777                         size_t len)
 778 {
 779         struct sta_info *sta;
 780         struct ieee802_1x_hdr *hdr;
 781         struct ieee802_1x_eapol_key *key;
 782         u16 datalen;
 783         struct rsn_pmksa_cache_entry *pmksa;
 784         int key_mgmt;
 785
 786         if (!hapd->conf->ieee802_1x && !hapd->conf->wpa && !hapd->conf->osen &&
 787             !hapd->conf->wps_state)
 788                 return;
 789
 790         wpa_printf(MSG_DEBUG, "IEEE 802.1X: %lu bytes from " MACSTR,
 791                    (unsigned long) len, MAC2STR(sa));
 792         sta = ap_get_sta(hapd, sa);
 793         if (!sta || (!(sta->flags & (WLAN_STA_ASSOC | WLAN_STA_PREAUTH)) &&
 794                      !(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_WIRED))) {
 795                 wpa_printf(MSG_DEBUG, "IEEE 802.1X data frame from not "
 796                            "associated/Pre-authenticating STA");
 797                 return;
 798         }
 799
 800         if (len < sizeof(*hdr)) {
 801                 wpa_printf(MSG_INFO, "   too short IEEE 802.1X packet");
 802                 return;
 803         }
 804
 805         hdr = (struct ieee802_1x_hdr *) buf;
 806         datalen = be_to_host16(hdr->length);
 807         wpa_printf(MSG_DEBUG, "   IEEE 802.1X: version=%d type=%d length=%d",
 808                    hdr->version, hdr->type, datalen);
 809
 810         if (len - sizeof(*hdr) < datalen) {
 811                 wpa_printf(MSG_INFO, "   frame too short for this IEEE 802.1X packet");
 812                 if (sta->eapol_sm)
 813                         sta->eapol_sm->dot1xAuthEapLengthErrorFramesRx++;
 814                 return;
 815         }
 816         if (len - sizeof(*hdr) > datalen) {
 817                 wpa_printf(MSG_DEBUG, "   ignoring %lu extra octets after "
 818                            "IEEE 802.1X packet",
 819                            (unsigned long) len - sizeof(*hdr) - datalen);
 820         }
 821
 822         if (sta->eapol_sm) {
 823                 sta->eapol_sm->dot1xAuthLastEapolFrameVersion = hdr->version;
 824                 sta->eapol_sm->dot1xAuthEapolFramesRx++;
 825         }
 826
 827         key = (struct ieee802_1x_eapol_key *) (hdr + 1);
 828         if (datalen >= sizeof(struct ieee802_1x_eapol_key) &&
 829             hdr->type == IEEE802_1X_TYPE_EAPOL_KEY &&
 830             (key->type == EAPOL_KEY_TYPE_WPA ||
 831              key->type == EAPOL_KEY_TYPE_RSN)) {
 832                 wpa_receive(hapd->wpa_auth, sta->wpa_sm, (u8 *) hdr,
 833                             sizeof(*hdr) + datalen);
 834                 return;
 835         }
 836
 837         if (!hapd->conf->ieee802_1x && !hapd->conf->osen &&
 838             !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) {
 839                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore EAPOL message - "
 840                            "802.1X not enabled and WPS not used");
 841                 return;
 842         }
 843
 844         key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm);
 845         if (key_mgmt != -1 && wpa_key_mgmt_wpa_psk(key_mgmt)) {
 846                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore EAPOL message - "
 847                            "STA is using PSK");
 848                 return;
 849         }
 850
 851         if (!sta->eapol_sm) {
 852                 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
 853                 if (!sta->eapol_sm)
 854                         return;
 855
 856 #ifdef CONFIG_WPS
 857                 if (!hapd->conf->ieee802_1x && hapd->conf->wps_state) {
 858                         u32 wflags = sta->flags & (WLAN_STA_WPS |
 859                                                    WLAN_STA_WPS2 |
 860                                                    WLAN_STA_MAYBE_WPS);
 861                         if (wflags == WLAN_STA_MAYBE_WPS ||
 862                             wflags == (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) {
 863                                 /*
 864                                  * Delay EAPOL frame transmission until a
 865                                  * possible WPS STA initiates the handshake
 866                                  * with EAPOL-Start. Only allow the wait to be
 867                                  * skipped if the STA is known to support WPS
 868                                  * 2.0.
 869                                  */
 870                                 wpa_printf(MSG_DEBUG, "WPS: Do not start "
 871                                            "EAPOL until EAPOL-Start is "
 872                                            "received");
 873                                 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
 874                         }
 875                 }
 876 #endif /* CONFIG_WPS */
 877
 878                 sta->eapol_sm->eap_if->portEnabled = TRUE;
 879         }
 880
 881         /* since we support version 1, we can ignore version field and proceed
 882          * as specified in version 1 standard [IEEE Std 802.1X-2001, 7.5.5] */
 883         /* TODO: actually, we are not version 1 anymore.. However, Version 2
 884          * does not change frame contents, so should be ok to process frames
 885          * more or less identically. Some changes might be needed for
 886          * verification of fields. */
 887
 888         switch (hdr->type) {
 889         case IEEE802_1X_TYPE_EAP_PACKET:
 890                 handle_eap(hapd, sta, (u8 *) (hdr + 1), datalen);
 891                 break;
 892
 893         case IEEE802_1X_TYPE_EAPOL_START:
 894                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 895                                HOSTAPD_LEVEL_DEBUG, "received EAPOL-Start "
 896                                "from STA");
 897                 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
 898                 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
 899                 if (pmksa) {
 900                         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
 901                                        HOSTAPD_LEVEL_DEBUG, "cached PMKSA "
 902                                        "available - ignore it since "
 903                                        "STA sent EAPOL-Start");
 904                         wpa_auth_sta_clear_pmksa(sta->wpa_sm, pmksa);
 905                 }
 906                 sta->eapol_sm->eapolStart = TRUE;
 907                 sta->eapol_sm->dot1xAuthEapolStartFramesRx++;
 908                 eap_server_clear_identity(sta->eapol_sm->eap);
 909                 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
 910                 break;
 911
 912         case IEEE802_1X_TYPE_EAPOL_LOGOFF:
 913                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 914                                HOSTAPD_LEVEL_DEBUG, "received EAPOL-Logoff "
 915                                "from STA");
 916                 sta->acct_terminate_cause =
 917                         RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
 918                 accounting_sta_stop(hapd, sta);
 919                 sta->eapol_sm->eapolLogoff = TRUE;
 920                 sta->eapol_sm->dot1xAuthEapolLogoffFramesRx++;
 921                 eap_server_clear_identity(sta->eapol_sm->eap);
 922                 break;
 923
 924         case IEEE802_1X_TYPE_EAPOL_KEY:
 925                 wpa_printf(MSG_DEBUG, "   EAPOL-Key");
 926                 if (!ap_sta_is_authorized(sta)) {
 927                         wpa_printf(MSG_DEBUG, "   Dropped key data from "
 928                                    "unauthorized Supplicant");
 929                         break;
 930                 }
 931                 break;
 932
 933         case IEEE802_1X_TYPE_EAPOL_ENCAPSULATED_ASF_ALERT:
 934                 wpa_printf(MSG_DEBUG, "   EAPOL-Encapsulated-ASF-Alert");
 935                 /* TODO: implement support for this; show data */
 936                 break;
 937
 938         default:
 939                 wpa_printf(MSG_DEBUG, "   unknown IEEE 802.1X packet type");
 940                 sta->eapol_sm->dot1xAuthInvalidEapolFramesRx++;
 941                 break;
 942         }
 943
 944         eapol_auth_step(sta->eapol_sm);
 945 }
 946
 947
 948 /**
 949  * ieee802_1x_new_station - Start IEEE 802.1X authentication
 950  * @hapd: hostapd BSS data
 951  * @sta: The station
 952  *
 953  * This function is called to start IEEE 802.1X authentication when a new
 954  * station completes IEEE 802.11 association.
 955  */
 956 void ieee802_1x_new_station(struct hostapd_data *hapd, struct sta_info *sta)
 957 {
 958         struct rsn_pmksa_cache_entry *pmksa;
 959         int reassoc = 1;
 960         int force_1x = 0;
 961         int key_mgmt;
 962
 963 #ifdef CONFIG_WPS
 964         if (hapd->conf->wps_state && hapd->conf->wpa &&
 965             (sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) {
 966                 /*
 967                  * Need to enable IEEE 802.1X/EAPOL state machines for possible
 968                  * WPS handshake even if IEEE 802.1X/EAPOL is not used for
 969                  * authentication in this BSS.
 970                  */
 971                 force_1x = 1;
 972         }
 973 #endif /* CONFIG_WPS */
 974
 975         if (!force_1x && !hapd->conf->ieee802_1x && !hapd->conf->osen) {
 976                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - "
 977                            "802.1X not enabled or forced for WPS");
 978                 /*
 979                  * Clear any possible EAPOL authenticator state to support
 980                  * reassociation change from WPS to PSK.
 981                  */
 982                 ieee802_1x_free_station(sta);
 983                 return;
 984         }
 985
 986         key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm);
 987         if (key_mgmt != -1 && wpa_key_mgmt_wpa_psk(key_mgmt)) {
 988                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - using PSK");
 989                 /*
 990                  * Clear any possible EAPOL authenticator state to support
 991                  * reassociation change from WPA-EAP to PSK.
 992                  */
 993                 ieee802_1x_free_station(sta);
 994                 return;
 995         }
 996
 997         if (sta->eapol_sm == NULL) {
 998                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 999                                HOSTAPD_LEVEL_DEBUG, "start authentication");
1000                 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
1001                 if (sta->eapol_sm == NULL) {
1002                         hostapd_logger(hapd, sta->addr,
1003                                        HOSTAPD_MODULE_IEEE8021X,
1004                                        HOSTAPD_LEVEL_INFO,
1005                                        "failed to allocate state machine");
1006                         return;
1007                 }
1008                 reassoc = 0;
1009         }
1010
1011 #ifdef CONFIG_WPS
1012         sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
1013         if (!hapd->conf->ieee802_1x && hapd->conf->wps_state &&
1014             !(sta->flags & WLAN_STA_WPS2)) {
1015                 /*
1016                  * Delay EAPOL frame transmission until a possible WPS STA
1017                  * initiates the handshake with EAPOL-Start. Only allow the
1018                  * wait to be skipped if the STA is known to support WPS 2.0.
1019                  */
1020                 wpa_printf(MSG_DEBUG, "WPS: Do not start EAPOL until "
1021                            "EAPOL-Start is received");
1022                 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
1023         }
1024 #endif /* CONFIG_WPS */
1025
1026         sta->eapol_sm->eap_if->portEnabled = TRUE;
1027
1028 #ifdef CONFIG_IEEE80211R
1029         if (sta->auth_alg == WLAN_AUTH_FT) {
1030                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1031                                HOSTAPD_LEVEL_DEBUG,
1032                                "PMK from FT - skip IEEE 802.1X/EAP");
1033                 /* Setup EAPOL state machines to already authenticated state
1034                  * because of existing FT information from R0KH. */
1035                 sta->eapol_sm->keyRun = TRUE;
1036                 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
1037                 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
1038                 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
1039                 sta->eapol_sm->authSuccess = TRUE;
1040                 sta->eapol_sm->authFail = FALSE;
1041                 if (sta->eapol_sm->eap)
1042                         eap_sm_notify_cached(sta->eapol_sm->eap);
1043                 /* TODO: get vlan_id from R0KH using RRB message */
1044                 return;
1045         }
1046 #endif /* CONFIG_IEEE80211R */
1047
1048         pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
1049         if (pmksa) {
1050                 int old_vlanid;
1051
1052                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1053                                HOSTAPD_LEVEL_DEBUG,
1054                                "PMK from PMKSA cache - skip IEEE 802.1X/EAP");
1055                 /* Setup EAPOL state machines to already authenticated state
1056                  * because of existing PMKSA information in the cache. */
1057                 sta->eapol_sm->keyRun = TRUE;
1058                 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
1059                 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
1060                 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
1061                 sta->eapol_sm->authSuccess = TRUE;
1062                 sta->eapol_sm->authFail = FALSE;
1063                 if (sta->eapol_sm->eap)
1064                         eap_sm_notify_cached(sta->eapol_sm->eap);
1065                 old_vlanid = sta->vlan_id;
1066                 pmksa_cache_to_eapol_data(pmksa, sta->eapol_sm);
1067                 if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
1068                         sta->vlan_id = 0;
1069                 ap_sta_bind_vlan(hapd, sta, old_vlanid);
1070         } else {
1071                 if (reassoc) {
1072                         /*
1073                          * Force EAPOL state machines to start
1074                          * re-authentication without having to wait for the
1075                          * Supplicant to send EAPOL-Start.
1076                          */
1077                         sta->eapol_sm->reAuthenticate = TRUE;
1078                 }
1079                 eapol_auth_step(sta->eapol_sm);
1080         }
1081 }
1082
1083
1084 void ieee802_1x_free_station(struct sta_info *sta)
1085 {
1086         struct eapol_state_machine *sm = sta->eapol_sm;
1087
1088         if (sm == NULL)
1089                 return;
1090
1091         sta->eapol_sm = NULL;
1092
1093 #ifndef CONFIG_NO_RADIUS
1094         radius_msg_free(sm->last_recv_radius);
1095         radius_free_class(&sm->radius_class);
1096         wpabuf_free(sm->radius_cui);
1097 #endif /* CONFIG_NO_RADIUS */
1098
1099         os_free(sm->identity);
1100         eapol_auth_free(sm);
1101 }
1102
1103
1104 #ifndef CONFIG_NO_RADIUS
1105 static void ieee802_1x_decapsulate_radius(struct hostapd_data *hapd,
1106                                           struct sta_info *sta)
1107 {
1108         struct wpabuf *eap;
1109         const struct eap_hdr *hdr;
1110         int eap_type = -1;
1111         char buf[64];
1112         struct radius_msg *msg;
1113         struct eapol_state_machine *sm = sta->eapol_sm;
1114
1115         if (sm == NULL || sm->last_recv_radius == NULL) {
1116                 if (sm)
1117                         sm->eap_if->aaaEapNoReq = TRUE;
1118                 return;
1119         }
1120
1121         msg = sm->last_recv_radius;
1122
1123         eap = radius_msg_get_eap(msg);
1124         if (eap == NULL) {
1125                 /* RFC 3579, Chap. 2.6.3:
1126                  * RADIUS server SHOULD NOT send Access-Reject/no EAP-Message
1127                  * attribute */
1128                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1129                                HOSTAPD_LEVEL_WARNING, "could not extract "
1130                                "EAP-Message from RADIUS message");
1131                 sm->eap_if->aaaEapNoReq = TRUE;
1132                 return;
1133         }
1134
1135         if (wpabuf_len(eap) < sizeof(*hdr)) {
1136                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1137                                HOSTAPD_LEVEL_WARNING, "too short EAP packet "
1138                                "received from authentication server");
1139                 wpabuf_free(eap);
1140                 sm->eap_if->aaaEapNoReq = TRUE;
1141                 return;
1142         }
1143
1144         if (wpabuf_len(eap) > sizeof(*hdr))
1145                 eap_type = (wpabuf_head_u8(eap))[sizeof(*hdr)];
1146
1147         hdr = wpabuf_head(eap);
1148         switch (hdr->code) {
1149         case EAP_CODE_REQUEST:
1150                 if (eap_type >= 0)
1151                         sm->eap_type_authsrv = eap_type;
1152                 os_snprintf(buf, sizeof(buf), "EAP-Request-%s (%d)",
1153                             eap_type >= 0 ? eap_server_get_name(0, eap_type) :
1154                             "??",
1155                             eap_type);
1156                 break;
1157         case EAP_CODE_RESPONSE:
1158                 os_snprintf(buf, sizeof(buf), "EAP Response-%s (%d)",
1159                             eap_type >= 0 ? eap_server_get_name(0, eap_type) :
1160                             "??",
1161                             eap_type);
1162                 break;
1163         case EAP_CODE_SUCCESS:
1164                 os_strlcpy(buf, "EAP Success", sizeof(buf));
1165                 break;
1166         case EAP_CODE_FAILURE:
1167                 os_strlcpy(buf, "EAP Failure", sizeof(buf));
1168                 break;
1169         default:
1170                 os_strlcpy(buf, "unknown EAP code", sizeof(buf));
1171                 break;
1172         }
1173         buf[sizeof(buf) - 1] = '\0';
1174         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1175                        HOSTAPD_LEVEL_DEBUG, "decapsulated EAP packet (code=%d "
1176                        "id=%d len=%d) from RADIUS server: %s",
1177                        hdr->code, hdr->identifier, be_to_host16(hdr->length),
1178                        buf);
1179         sm->eap_if->aaaEapReq = TRUE;
1180
1181         wpabuf_free(sm->eap_if->aaaEapReqData);
1182         sm->eap_if->aaaEapReqData = eap;
1183 }
1184
1185
1186 static void ieee802_1x_get_keys(struct hostapd_data *hapd,
1187                                 struct sta_info *sta, struct radius_msg *msg,
1188                                 struct radius_msg *req,
1189                                 const u8 *shared_secret,
1190                                 size_t shared_secret_len)
1191 {
1192         struct radius_ms_mppe_keys *keys;
1193         struct eapol_state_machine *sm = sta->eapol_sm;
1194         if (sm == NULL)
1195                 return;
1196
1197         keys = radius_msg_get_ms_keys(msg, req, shared_secret,
1198                                       shared_secret_len);
1199
1200         if (keys && keys->send && keys->recv) {
1201                 size_t len = keys->send_len + keys->recv_len;
1202                 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Send-Key",
1203                                 keys->send, keys->send_len);
1204                 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Recv-Key",
1205                                 keys->recv, keys->recv_len);
1206
1207                 os_free(sm->eap_if->aaaEapKeyData);
1208                 sm->eap_if->aaaEapKeyData = os_malloc(len);
1209                 if (sm->eap_if->aaaEapKeyData) {
1210                         os_memcpy(sm->eap_if->aaaEapKeyData, keys->recv,
1211                                   keys->recv_len);
1212                         os_memcpy(sm->eap_if->aaaEapKeyData + keys->recv_len,
1213                                   keys->send, keys->send_len);
1214                         sm->eap_if->aaaEapKeyDataLen = len;
1215                         sm->eap_if->aaaEapKeyAvailable = TRUE;
1216                 }
1217         }
1218
1219         if (keys) {
1220                 os_free(keys->send);
1221                 os_free(keys->recv);
1222                 os_free(keys);
1223         }
1224 }
1225
1226
1227 static void ieee802_1x_store_radius_class(struct hostapd_data *hapd,
1228                                           struct sta_info *sta,
1229                                           struct radius_msg *msg)
1230 {
1231         u8 *class;
1232         size_t class_len;
1233         struct eapol_state_machine *sm = sta->eapol_sm;
1234         int count, i;
1235         struct radius_attr_data *nclass;
1236         size_t nclass_count;
1237
1238         if (!hapd->conf->radius->acct_server || hapd->radius == NULL ||
1239             sm == NULL)
1240                 return;
1241
1242         radius_free_class(&sm->radius_class);
1243         count = radius_msg_count_attr(msg, RADIUS_ATTR_CLASS, 1);
1244         if (count <= 0)
1245                 return;
1246
1247         nclass = os_calloc(count, sizeof(struct radius_attr_data));
1248         if (nclass == NULL)
1249                 return;
1250
1251         nclass_count = 0;
1252
1253         class = NULL;
1254         for (i = 0; i < count; i++) {
1255                 do {
1256                         if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CLASS,
1257                                                     &class, &class_len,
1258                                                     class) < 0) {
1259                                 i = count;
1260                                 break;
1261                         }
1262                 } while (class_len < 1);
1263
1264                 nclass[nclass_count].data = os_malloc(class_len);
1265                 if (nclass[nclass_count].data == NULL)
1266                         break;
1267
1268                 os_memcpy(nclass[nclass_count].data, class, class_len);
1269                 nclass[nclass_count].len = class_len;
1270                 nclass_count++;
1271         }
1272
1273         sm->radius_class.attr = nclass;
1274         sm->radius_class.count = nclass_count;
1275         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Stored %lu RADIUS Class "
1276                    "attributes for " MACSTR,
1277                    (unsigned long) sm->radius_class.count,
1278                    MAC2STR(sta->addr));
1279 }
1280
1281
1282 /* Update sta->identity based on User-Name attribute in Access-Accept */
1283 static void ieee802_1x_update_sta_identity(struct hostapd_data *hapd,
1284                                            struct sta_info *sta,
1285                                            struct radius_msg *msg)
1286 {
1287         u8 *buf, *identity;
1288         size_t len;
1289         struct eapol_state_machine *sm = sta->eapol_sm;
1290
1291         if (sm == NULL)
1292                 return;
1293
1294         if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_USER_NAME, &buf, &len,
1295                                     NULL) < 0)
1296                 return;
1297
1298         identity = (u8 *) dup_binstr(buf, len);
1299         if (identity == NULL)
1300                 return;
1301
1302         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1303                        HOSTAPD_LEVEL_DEBUG, "old identity '%s' updated with "
1304                        "User-Name from Access-Accept '%s'",
1305                        sm->identity ? (char *) sm->identity : "N/A",
1306                        (char *) identity);
1307
1308         os_free(sm->identity);
1309         sm->identity = identity;
1310         sm->identity_len = len;
1311 }
1312
1313
1314 /* Update CUI based on Chargeable-User-Identity attribute in Access-Accept */
1315 static void ieee802_1x_update_sta_cui(struct hostapd_data *hapd,
1316                                       struct sta_info *sta,
1317                                       struct radius_msg *msg)
1318 {
1319         struct eapol_state_machine *sm = sta->eapol_sm;
1320         struct wpabuf *cui;
1321         u8 *buf;
1322         size_t len;
1323
1324         if (sm == NULL)
1325                 return;
1326
1327         if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CHARGEABLE_USER_IDENTITY,
1328                                     &buf, &len, NULL) < 0)
1329                 return;
1330
1331         cui = wpabuf_alloc_copy(buf, len);
1332         if (cui == NULL)
1333                 return;
1334
1335         wpabuf_free(sm->radius_cui);
1336         sm->radius_cui = cui;
1337 }
1338
1339
1340 #ifdef CONFIG_HS20
1341
1342 static void ieee802_1x_hs20_sub_rem(struct sta_info *sta, u8 *pos, size_t len)
1343 {
1344         sta->remediation = 1;
1345         os_free(sta->remediation_url);
1346         if (len > 2) {
1347                 sta->remediation_url = os_malloc(len);
1348                 if (!sta->remediation_url)
1349                         return;
1350                 sta->remediation_method = pos[0];
1351                 os_memcpy(sta->remediation_url, pos + 1, len - 1);
1352                 sta->remediation_url[len - 1] = '\0';
1353                 wpa_printf(MSG_DEBUG, "HS 2.0: Subscription remediation needed "
1354                            "for " MACSTR " - server method %u URL %s",
1355                            MAC2STR(sta->addr), sta->remediation_method,
1356                            sta->remediation_url);
1357         } else {
1358                 sta->remediation_url = NULL;
1359                 wpa_printf(MSG_DEBUG, "HS 2.0: Subscription remediation needed "
1360                            "for " MACSTR, MAC2STR(sta->addr));
1361         }
1362         /* TODO: assign the STA into remediation VLAN or add filtering */
1363 }
1364
1365
1366 static void ieee802_1x_hs20_deauth_req(struct hostapd_data *hapd,
1367                                        struct sta_info *sta, u8 *pos,
1368                                        size_t len)
1369 {
1370         if (len < 3)
1371                 return; /* Malformed information */
1372         sta->hs20_deauth_requested = 1;
1373         wpa_printf(MSG_DEBUG, "HS 2.0: Deauthentication request - Code %u  "
1374                    "Re-auth Delay %u",
1375                    *pos, WPA_GET_LE16(pos + 1));
1376         wpabuf_free(sta->hs20_deauth_req);
1377         sta->hs20_deauth_req = wpabuf_alloc(len + 1);
1378         if (sta->hs20_deauth_req) {
1379                 wpabuf_put_data(sta->hs20_deauth_req, pos, 3);
1380                 wpabuf_put_u8(sta->hs20_deauth_req, len - 3);
1381                 wpabuf_put_data(sta->hs20_deauth_req, pos + 3, len - 3);
1382         }
1383         ap_sta_session_timeout(hapd, sta, hapd->conf->hs20_deauth_req_timeout);
1384 }
1385
1386
1387 static void ieee802_1x_hs20_session_info(struct hostapd_data *hapd,
1388                                          struct sta_info *sta, u8 *pos,
1389                                          size_t len, int session_timeout)
1390 {
1391         unsigned int swt;
1392         int warning_time, beacon_int;
1393
1394         if (len < 1)
1395                 return; /* Malformed information */
1396         os_free(sta->hs20_session_info_url);
1397         sta->hs20_session_info_url = os_malloc(len);
1398         if (sta->hs20_session_info_url == NULL)
1399                 return;
1400         swt = pos[0];
1401         os_memcpy(sta->hs20_session_info_url, pos + 1, len - 1);
1402         sta->hs20_session_info_url[len - 1] = '\0';
1403         wpa_printf(MSG_DEBUG, "HS 2.0: Session Information URL='%s' SWT=%u "
1404                    "(session_timeout=%d)",
1405                    sta->hs20_session_info_url, swt, session_timeout);
1406         if (session_timeout < 0) {
1407                 wpa_printf(MSG_DEBUG, "HS 2.0: No Session-Timeout set - ignore session info URL");
1408                 return;
1409         }
1410         if (swt == 255)
1411                 swt = 1; /* Use one minute as the AP selected value */
1412
1413         if ((unsigned int) session_timeout < swt * 60)
1414                 warning_time = 0;
1415         else
1416                 warning_time = session_timeout - swt * 60;
1417
1418         beacon_int = hapd->iconf->beacon_int;
1419         if (beacon_int < 1)
1420                 beacon_int = 100; /* best guess */
1421         sta->hs20_disassoc_timer = swt * 60 * 1000 / beacon_int * 125 / 128;
1422         if (sta->hs20_disassoc_timer > 65535)
1423                 sta->hs20_disassoc_timer = 65535;
1424
1425         ap_sta_session_warning_timeout(hapd, sta, warning_time);
1426 }
1427
1428 #endif /* CONFIG_HS20 */
1429
1430
1431 static void ieee802_1x_check_hs20(struct hostapd_data *hapd,
1432                                   struct sta_info *sta,
1433                                   struct radius_msg *msg,
1434                                   int session_timeout)
1435 {
1436 #ifdef CONFIG_HS20
1437         u8 *buf, *pos, *end, type, sublen;
1438         size_t len;
1439
1440         buf = NULL;
1441         sta->remediation = 0;
1442         sta->hs20_deauth_requested = 0;
1443
1444         for (;;) {
1445                 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_VENDOR_SPECIFIC,
1446                                             &buf, &len, buf) < 0)
1447                         break;
1448                 if (len < 6)
1449                         continue;
1450                 pos = buf;
1451                 end = buf + len;
1452                 if (WPA_GET_BE32(pos) != RADIUS_VENDOR_ID_WFA)
1453                         continue;
1454                 pos += 4;
1455
1456                 type = *pos++;
1457                 sublen = *pos++;
1458                 if (sublen < 2)
1459                         continue; /* invalid length */
1460                 sublen -= 2; /* skip header */
1461                 if (pos + sublen > end)
1462                         continue; /* invalid WFA VSA */
1463
1464                 switch (type) {
1465                 case RADIUS_VENDOR_ATTR_WFA_HS20_SUBSCR_REMEDIATION:
1466                         ieee802_1x_hs20_sub_rem(sta, pos, sublen);
1467                         break;
1468                 case RADIUS_VENDOR_ATTR_WFA_HS20_DEAUTH_REQ:
1469                         ieee802_1x_hs20_deauth_req(hapd, sta, pos, sublen);
1470                         break;
1471                 case RADIUS_VENDOR_ATTR_WFA_HS20_SESSION_INFO_URL:
1472                         ieee802_1x_hs20_session_info(hapd, sta, pos, sublen,
1473                                                      session_timeout);
1474                         break;
1475                 }
1476         }
1477 #endif /* CONFIG_HS20 */
1478 }
1479
1480
1481 struct sta_id_search {
1482         u8 identifier;
1483         struct eapol_state_machine *sm;
1484 };
1485
1486
1487 static int ieee802_1x_select_radius_identifier(struct hostapd_data *hapd,
1488                                                struct sta_info *sta,
1489                                                void *ctx)
1490 {
1491         struct sta_id_search *id_search = ctx;
1492         struct eapol_state_machine *sm = sta->eapol_sm;
1493
1494         if (sm && sm->radius_identifier >= 0 &&
1495             sm->radius_identifier == id_search->identifier) {
1496                 id_search->sm = sm;
1497                 return 1;
1498         }
1499         return 0;
1500 }
1501
1502
1503 static struct eapol_state_machine *
1504 ieee802_1x_search_radius_identifier(struct hostapd_data *hapd, u8 identifier)
1505 {
1506         struct sta_id_search id_search;
1507         id_search.identifier = identifier;
1508         id_search.sm = NULL;
1509         ap_for_each_sta(hapd, ieee802_1x_select_radius_identifier, &id_search);
1510         return id_search.sm;
1511 }
1512
1513
1514 /**
1515  * ieee802_1x_receive_auth - Process RADIUS frames from Authentication Server
1516  * @msg: RADIUS response message
1517  * @req: RADIUS request message
1518  * @shared_secret: RADIUS shared secret
1519  * @shared_secret_len: Length of shared_secret in octets
1520  * @data: Context data (struct hostapd_data *)
1521  * Returns: Processing status
1522  */
1523 static RadiusRxResult
1524 ieee802_1x_receive_auth(struct radius_msg *msg, struct radius_msg *req,
1525                         const u8 *shared_secret, size_t shared_secret_len,
1526                         void *data)
1527 {
1528         struct hostapd_data *hapd = data;
1529         struct sta_info *sta;
1530         u32 session_timeout = 0, termination_action, acct_interim_interval;
1531         int session_timeout_set, old_vlanid = 0;
1532         struct eapol_state_machine *sm;
1533         int override_eapReq = 0;
1534         struct radius_hdr *hdr = radius_msg_get_hdr(msg);
1535
1536         sm = ieee802_1x_search_radius_identifier(hapd, hdr->identifier);
1537         if (sm == NULL) {
1538                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Could not find matching "
1539                            "station for this RADIUS message");
1540                 return RADIUS_RX_UNKNOWN;
1541         }
1542         sta = sm->sta;
1543
1544         /* RFC 2869, Ch. 5.13: valid Message-Authenticator attribute MUST be
1545          * present when packet contains an EAP-Message attribute */
1546         if (hdr->code == RADIUS_CODE_ACCESS_REJECT &&
1547             radius_msg_get_attr(msg, RADIUS_ATTR_MESSAGE_AUTHENTICATOR, NULL,
1548                                 0) < 0 &&
1549             radius_msg_get_attr(msg, RADIUS_ATTR_EAP_MESSAGE, NULL, 0) < 0) {
1550                 wpa_printf(MSG_DEBUG, "Allowing RADIUS Access-Reject without "
1551                            "Message-Authenticator since it does not include "
1552                            "EAP-Message");
1553         } else if (radius_msg_verify(msg, shared_secret, shared_secret_len,
1554                                      req, 1)) {
1555                 wpa_printf(MSG_INFO, "Incoming RADIUS packet did not have correct Message-Authenticator - dropped");
1556                 return RADIUS_RX_INVALID_AUTHENTICATOR;
1557         }
1558
1559         if (hdr->code != RADIUS_CODE_ACCESS_ACCEPT &&
1560             hdr->code != RADIUS_CODE_ACCESS_REJECT &&
1561             hdr->code != RADIUS_CODE_ACCESS_CHALLENGE) {
1562                 wpa_printf(MSG_INFO, "Unknown RADIUS message code");
1563                 return RADIUS_RX_UNKNOWN;
1564         }
1565
1566         sm->radius_identifier = -1;
1567         wpa_printf(MSG_DEBUG, "RADIUS packet matching with station " MACSTR,
1568                    MAC2STR(sta->addr));
1569
1570         radius_msg_free(sm->last_recv_radius);
1571         sm->last_recv_radius = msg;
1572
1573         session_timeout_set =
1574                 !radius_msg_get_attr_int32(msg, RADIUS_ATTR_SESSION_TIMEOUT,
1575                                            &session_timeout);
1576         if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_TERMINATION_ACTION,
1577                                       &termination_action))
1578                 termination_action = RADIUS_TERMINATION_ACTION_DEFAULT;
1579
1580         if (hapd->conf->acct_interim_interval == 0 &&
1581             hdr->code == RADIUS_CODE_ACCESS_ACCEPT &&
1582             radius_msg_get_attr_int32(msg, RADIUS_ATTR_ACCT_INTERIM_INTERVAL,
1583                                       &acct_interim_interval) == 0) {
1584                 if (acct_interim_interval < 60) {
1585                         hostapd_logger(hapd, sta->addr,
1586                                        HOSTAPD_MODULE_IEEE8021X,
1587                                        HOSTAPD_LEVEL_INFO,
1588                                        "ignored too small "
1589                                        "Acct-Interim-Interval %d",
1590                                        acct_interim_interval);
1591                 } else
1592                         sta->acct_interim_interval = acct_interim_interval;
1593         }
1594
1595
1596         switch (hdr->code) {
1597         case RADIUS_CODE_ACCESS_ACCEPT:
1598                 if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
1599                         sta->vlan_id = 0;
1600 #ifndef CONFIG_NO_VLAN
1601                 else {
1602                         old_vlanid = sta->vlan_id;
1603                         sta->vlan_id = radius_msg_get_vlanid(msg);
1604                 }
1605                 if (sta->vlan_id > 0 &&
1606                     hostapd_vlan_id_valid(hapd->conf->vlan, sta->vlan_id)) {
1607                         hostapd_logger(hapd, sta->addr,
1608                                        HOSTAPD_MODULE_RADIUS,
1609                                        HOSTAPD_LEVEL_INFO,
1610                                        "VLAN ID %d", sta->vlan_id);
1611                 } else if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_REQUIRED) {
1612                         sta->eapol_sm->authFail = TRUE;
1613                         hostapd_logger(hapd, sta->addr,
1614                                        HOSTAPD_MODULE_IEEE8021X,
1615                                        HOSTAPD_LEVEL_INFO, "authentication "
1616                                        "server did not include required VLAN "
1617                                        "ID in Access-Accept");
1618                         break;
1619                 }
1620 #endif /* CONFIG_NO_VLAN */
1621
1622                 if (ap_sta_bind_vlan(hapd, sta, old_vlanid) < 0)
1623                         break;
1624
1625                 sta->session_timeout_set = !!session_timeout_set;
1626                 sta->session_timeout = session_timeout;
1627
1628                 /* RFC 3580, Ch. 3.17 */
1629                 if (session_timeout_set && termination_action ==
1630                     RADIUS_TERMINATION_ACTION_RADIUS_REQUEST) {
1631                         sm->reAuthPeriod = session_timeout;
1632                 } else if (session_timeout_set)
1633                         ap_sta_session_timeout(hapd, sta, session_timeout);
1634
1635                 sm->eap_if->aaaSuccess = TRUE;
1636                 override_eapReq = 1;
1637                 ieee802_1x_get_keys(hapd, sta, msg, req, shared_secret,
1638                                     shared_secret_len);
1639                 ieee802_1x_store_radius_class(hapd, sta, msg);
1640                 ieee802_1x_update_sta_identity(hapd, sta, msg);
1641                 ieee802_1x_update_sta_cui(hapd, sta, msg);
1642                 ieee802_1x_check_hs20(hapd, sta, msg,
1643                                       session_timeout_set ?
1644                                       (int) session_timeout : -1);
1645                 if (sm->eap_if->eapKeyAvailable && !sta->remediation &&
1646                     !sta->hs20_deauth_requested &&
1647                     wpa_auth_pmksa_add(sta->wpa_sm, sm->eapol_key_crypt,
1648                                        session_timeout_set ?
1649                                        (int) session_timeout : -1, sm) == 0) {
1650                         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
1651                                        HOSTAPD_LEVEL_DEBUG,
1652                                        "Added PMKSA cache entry");
1653                 }
1654                 break;
1655         case RADIUS_CODE_ACCESS_REJECT:
1656                 sm->eap_if->aaaFail = TRUE;
1657                 override_eapReq = 1;
1658                 break;
1659         case RADIUS_CODE_ACCESS_CHALLENGE:
1660                 sm->eap_if->aaaEapReq = TRUE;
1661                 if (session_timeout_set) {
1662                         /* RFC 2869, Ch. 2.3.2; RFC 3580, Ch. 3.17 */
1663                         sm->eap_if->aaaMethodTimeout = session_timeout;
1664                         hostapd_logger(hapd, sm->addr,
1665                                        HOSTAPD_MODULE_IEEE8021X,
1666                                        HOSTAPD_LEVEL_DEBUG,
1667                                        "using EAP timeout of %d seconds (from "
1668                                        "RADIUS)",
1669                                        sm->eap_if->aaaMethodTimeout);
1670                 } else {
1671                         /*
1672                          * Use dynamic retransmission behavior per EAP
1673                          * specification.
1674                          */
1675                         sm->eap_if->aaaMethodTimeout = 0;
1676                 }
1677                 break;
1678         }
1679
1680         ieee802_1x_decapsulate_radius(hapd, sta);
1681         if (override_eapReq)
1682                 sm->eap_if->aaaEapReq = FALSE;
1683
1684         eapol_auth_step(sm);
1685
1686         return RADIUS_RX_QUEUED;
1687 }
1688 #endif /* CONFIG_NO_RADIUS */
1689
1690
1691 void ieee802_1x_abort_auth(struct hostapd_data *hapd, struct sta_info *sta)
1692 {
1693         struct eapol_state_machine *sm = sta->eapol_sm;
1694         if (sm == NULL)
1695                 return;
1696
1697         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1698                        HOSTAPD_LEVEL_DEBUG, "aborting authentication");
1699
1700 #ifndef CONFIG_NO_RADIUS
1701         radius_msg_free(sm->last_recv_radius);
1702         sm->last_recv_radius = NULL;
1703 #endif /* CONFIG_NO_RADIUS */
1704
1705         if (sm->eap_if->eapTimeout) {
1706                 /*
1707                  * Disconnect the STA since it did not reply to the last EAP
1708                  * request and we cannot continue EAP processing (EAP-Failure
1709                  * could only be sent if the EAP peer actually replied).
1710                  */
1711                 wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "EAP Timeout, STA " MACSTR,
1712                         MAC2STR(sta->addr));
1713
1714                 sm->eap_if->portEnabled = FALSE;
1715                 ap_sta_disconnect(hapd, sta, sta->addr,
1716                                   WLAN_REASON_PREV_AUTH_NOT_VALID);
1717         }
1718 }
1719
1720
1721 static int ieee802_1x_rekey_broadcast(struct hostapd_data *hapd)
1722 {
1723         struct eapol_authenticator *eapol = hapd->eapol_auth;
1724
1725         if (hapd->conf->default_wep_key_len < 1)
1726                 return 0;
1727
1728         os_free(eapol->default_wep_key);
1729         eapol->default_wep_key = os_malloc(hapd->conf->default_wep_key_len);
1730         if (eapol->default_wep_key == NULL ||
1731             random_get_bytes(eapol->default_wep_key,
1732                              hapd->conf->default_wep_key_len)) {
1733                 wpa_printf(MSG_INFO, "Could not generate random WEP key");
1734                 os_free(eapol->default_wep_key);
1735                 eapol->default_wep_key = NULL;
1736                 return -1;
1737         }
1738
1739         wpa_hexdump_key(MSG_DEBUG, "IEEE 802.1X: New default WEP key",
1740                         eapol->default_wep_key,
1741                         hapd->conf->default_wep_key_len);
1742
1743         return 0;
1744 }
1745
1746
1747 static int ieee802_1x_sta_key_available(struct hostapd_data *hapd,
1748                                         struct sta_info *sta, void *ctx)
1749 {
1750         if (sta->eapol_sm) {
1751                 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
1752                 eapol_auth_step(sta->eapol_sm);
1753         }
1754         return 0;
1755 }
1756
1757
1758 static void ieee802_1x_rekey(void *eloop_ctx, void *timeout_ctx)
1759 {
1760         struct hostapd_data *hapd = eloop_ctx;
1761         struct eapol_authenticator *eapol = hapd->eapol_auth;
1762
1763         if (eapol->default_wep_key_idx >= 3)
1764                 eapol->default_wep_key_idx =
1765                         hapd->conf->individual_wep_key_len > 0 ? 1 : 0;
1766         else
1767                 eapol->default_wep_key_idx++;
1768
1769         wpa_printf(MSG_DEBUG, "IEEE 802.1X: New default WEP key index %d",
1770                    eapol->default_wep_key_idx);
1771
1772         if (ieee802_1x_rekey_broadcast(hapd)) {
1773                 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1774                                HOSTAPD_LEVEL_WARNING, "failed to generate a "
1775                                "new broadcast key");
1776                 os_free(eapol->default_wep_key);
1777                 eapol->default_wep_key = NULL;
1778                 return;
1779         }
1780
1781         /* TODO: Could setup key for RX here, but change default TX keyid only
1782          * after new broadcast key has been sent to all stations. */
1783         if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
1784                                 broadcast_ether_addr,
1785                                 eapol->default_wep_key_idx, 1, NULL, 0,
1786                                 eapol->default_wep_key,
1787                                 hapd->conf->default_wep_key_len)) {
1788                 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1789                                HOSTAPD_LEVEL_WARNING, "failed to configure a "
1790                                "new broadcast key");
1791                 os_free(eapol->default_wep_key);
1792                 eapol->default_wep_key = NULL;
1793                 return;
1794         }
1795
1796         ap_for_each_sta(hapd, ieee802_1x_sta_key_available, NULL);
1797
1798         if (hapd->conf->wep_rekeying_period > 0) {
1799                 eloop_register_timeout(hapd->conf->wep_rekeying_period, 0,
1800                                        ieee802_1x_rekey, hapd, NULL);
1801         }
1802 }
1803
1804
1805 static void ieee802_1x_eapol_send(void *ctx, void *sta_ctx, u8 type,
1806                                   const u8 *data, size_t datalen)
1807 {
1808 #ifdef CONFIG_WPS
1809         struct sta_info *sta = sta_ctx;
1810
1811         if ((sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) ==
1812             WLAN_STA_MAYBE_WPS) {
1813                 const u8 *identity;
1814                 size_t identity_len;
1815                 struct eapol_state_machine *sm = sta->eapol_sm;
1816
1817                 identity = eap_get_identity(sm->eap, &identity_len);
1818                 if (identity &&
1819                     ((identity_len == WSC_ID_ENROLLEE_LEN &&
1820                       os_memcmp(identity, WSC_ID_ENROLLEE,
1821                                 WSC_ID_ENROLLEE_LEN) == 0) ||
1822                      (identity_len == WSC_ID_REGISTRAR_LEN &&
1823                       os_memcmp(identity, WSC_ID_REGISTRAR,
1824                                 WSC_ID_REGISTRAR_LEN) == 0))) {
1825                         wpa_printf(MSG_DEBUG, "WPS: WLAN_STA_MAYBE_WPS -> "
1826                                    "WLAN_STA_WPS");
1827                         sta->flags |= WLAN_STA_WPS;
1828                 }
1829         }
1830 #endif /* CONFIG_WPS */
1831
1832         ieee802_1x_send(ctx, sta_ctx, type, data, datalen);
1833 }
1834
1835
1836 static void ieee802_1x_aaa_send(void *ctx, void *sta_ctx,
1837                                 const u8 *data, size_t datalen)
1838 {
1839 #ifndef CONFIG_NO_RADIUS
1840         struct hostapd_data *hapd = ctx;
1841         struct sta_info *sta = sta_ctx;
1842
1843         ieee802_1x_encapsulate_radius(hapd, sta, data, datalen);
1844 #endif /* CONFIG_NO_RADIUS */
1845 }
1846
1847
1848 static void _ieee802_1x_finished(void *ctx, void *sta_ctx, int success,
1849                                  int preauth, int remediation)
1850 {
1851         struct hostapd_data *hapd = ctx;
1852         struct sta_info *sta = sta_ctx;
1853         if (preauth)
1854                 rsn_preauth_finished(hapd, sta, success);
1855         else
1856                 ieee802_1x_finished(hapd, sta, success, remediation);
1857 }
1858
1859
1860 static int ieee802_1x_get_eap_user(void *ctx, const u8 *identity,
1861                                    size_t identity_len, int phase2,
1862                                    struct eap_user *user)
1863 {
1864         struct hostapd_data *hapd = ctx;
1865         const struct hostapd_eap_user *eap_user;
1866         int i;
1867
1868         eap_user = hostapd_get_eap_user(hapd, identity, identity_len, phase2);
1869         if (eap_user == NULL)
1870                 return -1;
1871
1872         os_memset(user, 0, sizeof(*user));
1873         user->phase2 = phase2;
1874         for (i = 0; i < EAP_MAX_METHODS; i++) {
1875                 user->methods[i].vendor = eap_user->methods[i].vendor;
1876                 user->methods[i].method = eap_user->methods[i].method;
1877         }
1878
1879         if (eap_user->password) {
1880                 user->password = os_malloc(eap_user->password_len);
1881                 if (user->password == NULL)
1882                         return -1;
1883                 os_memcpy(user->password, eap_user->password,
1884                           eap_user->password_len);
1885                 user->password_len = eap_user->password_len;
1886                 user->password_hash = eap_user->password_hash;
1887         }
1888         user->force_version = eap_user->force_version;
1889         user->macacl = eap_user->macacl;
1890         user->ttls_auth = eap_user->ttls_auth;
1891         user->remediation = eap_user->remediation;
1892
1893         return 0;
1894 }
1895
1896
1897 static int ieee802_1x_sta_entry_alive(void *ctx, const u8 *addr)
1898 {
1899         struct hostapd_data *hapd = ctx;
1900         struct sta_info *sta;
1901         sta = ap_get_sta(hapd, addr);
1902         if (sta == NULL || sta->eapol_sm == NULL)
1903                 return 0;
1904         return 1;
1905 }
1906
1907
1908 static void ieee802_1x_logger(void *ctx, const u8 *addr,
1909                               eapol_logger_level level, const char *txt)
1910 {
1911 #ifndef CONFIG_NO_HOSTAPD_LOGGER
1912         struct hostapd_data *hapd = ctx;
1913         int hlevel;
1914
1915         switch (level) {
1916         case EAPOL_LOGGER_WARNING:
1917                 hlevel = HOSTAPD_LEVEL_WARNING;
1918                 break;
1919         case EAPOL_LOGGER_INFO:
1920                 hlevel = HOSTAPD_LEVEL_INFO;
1921                 break;
1922         case EAPOL_LOGGER_DEBUG:
1923         default:
1924                 hlevel = HOSTAPD_LEVEL_DEBUG;
1925                 break;
1926         }
1927
1928         hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE8021X, hlevel, "%s",
1929                        txt);
1930 #endif /* CONFIG_NO_HOSTAPD_LOGGER */
1931 }
1932
1933
1934 static void ieee802_1x_set_port_authorized(void *ctx, void *sta_ctx,
1935                                            int authorized)
1936 {
1937         struct hostapd_data *hapd = ctx;
1938         struct sta_info *sta = sta_ctx;
1939         ieee802_1x_set_sta_authorized(hapd, sta, authorized);
1940 }
1941
1942
1943 static void _ieee802_1x_abort_auth(void *ctx, void *sta_ctx)
1944 {
1945         struct hostapd_data *hapd = ctx;
1946         struct sta_info *sta = sta_ctx;
1947         ieee802_1x_abort_auth(hapd, sta);
1948 }
1949
1950
1951 static void _ieee802_1x_tx_key(void *ctx, void *sta_ctx)
1952 {
1953         struct hostapd_data *hapd = ctx;
1954         struct sta_info *sta = sta_ctx;
1955         ieee802_1x_tx_key(hapd, sta);
1956 }
1957
1958
1959 static void ieee802_1x_eapol_event(void *ctx, void *sta_ctx,
1960                                    enum eapol_event type)
1961 {
1962         /* struct hostapd_data *hapd = ctx; */
1963         struct sta_info *sta = sta_ctx;
1964         switch (type) {
1965         case EAPOL_AUTH_SM_CHANGE:
1966                 wpa_auth_sm_notify(sta->wpa_sm);
1967                 break;
1968         case EAPOL_AUTH_REAUTHENTICATE:
1969                 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
1970                 break;
1971         }
1972 }
1973
1974
1975 int ieee802_1x_init(struct hostapd_data *hapd)
1976 {
1977         int i;
1978         struct eapol_auth_config conf;
1979         struct eapol_auth_cb cb;
1980
1981         os_memset(&conf, 0, sizeof(conf));
1982         conf.ctx = hapd;
1983         conf.eap_reauth_period = hapd->conf->eap_reauth_period;
1984         conf.wpa = hapd->conf->wpa;
1985         conf.individual_wep_key_len = hapd->conf->individual_wep_key_len;
1986         conf.eap_server = hapd->conf->eap_server;
1987         conf.ssl_ctx = hapd->ssl_ctx;
1988         conf.msg_ctx = hapd->msg_ctx;
1989         conf.eap_sim_db_priv = hapd->eap_sim_db_priv;
1990         conf.eap_req_id_text = hapd->conf->eap_req_id_text;
1991         conf.eap_req_id_text_len = hapd->conf->eap_req_id_text_len;
1992         conf.pac_opaque_encr_key = hapd->conf->pac_opaque_encr_key;
1993         conf.eap_fast_a_id = hapd->conf->eap_fast_a_id;
1994         conf.eap_fast_a_id_len = hapd->conf->eap_fast_a_id_len;
1995         conf.eap_fast_a_id_info = hapd->conf->eap_fast_a_id_info;
1996         conf.eap_fast_prov = hapd->conf->eap_fast_prov;
1997         conf.pac_key_lifetime = hapd->conf->pac_key_lifetime;
1998         conf.pac_key_refresh_time = hapd->conf->pac_key_refresh_time;
1999         conf.eap_sim_aka_result_ind = hapd->conf->eap_sim_aka_result_ind;
2000         conf.tnc = hapd->conf->tnc;
2001         conf.wps = hapd->wps;
2002         conf.fragment_size = hapd->conf->fragment_size;
2003         conf.pwd_group = hapd->conf->pwd_group;
2004         conf.pbc_in_m1 = hapd->conf->pbc_in_m1;
2005         if (hapd->conf->server_id) {
2006                 conf.server_id = (const u8 *) hapd->conf->server_id;
2007                 conf.server_id_len = os_strlen(hapd->conf->server_id);
2008         } else {
2009                 conf.server_id = (const u8 *) "hostapd";
2010                 conf.server_id_len = 7;
2011         }
2012
2013         os_memset(&cb, 0, sizeof(cb));
2014         cb.eapol_send = ieee802_1x_eapol_send;
2015         cb.aaa_send = ieee802_1x_aaa_send;
2016         cb.finished = _ieee802_1x_finished;
2017         cb.get_eap_user = ieee802_1x_get_eap_user;
2018         cb.sta_entry_alive = ieee802_1x_sta_entry_alive;
2019         cb.logger = ieee802_1x_logger;
2020         cb.set_port_authorized = ieee802_1x_set_port_authorized;
2021         cb.abort_auth = _ieee802_1x_abort_auth;
2022         cb.tx_key = _ieee802_1x_tx_key;
2023         cb.eapol_event = ieee802_1x_eapol_event;
2024
2025         hapd->eapol_auth = eapol_auth_init(&conf, &cb);
2026         if (hapd->eapol_auth == NULL)
2027                 return -1;
2028
2029         if ((hapd->conf->ieee802_1x || hapd->conf->wpa) &&
2030             hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 1))
2031                 return -1;
2032
2033 #ifndef CONFIG_NO_RADIUS
2034         if (radius_client_register(hapd->radius, RADIUS_AUTH,
2035                                    ieee802_1x_receive_auth, hapd))
2036                 return -1;
2037 #endif /* CONFIG_NO_RADIUS */
2038
2039         if (hapd->conf->default_wep_key_len) {
2040                 for (i = 0; i < 4; i++)
2041                         hostapd_drv_set_key(hapd->conf->iface, hapd,
2042                                             WPA_ALG_NONE, NULL, i, 0, NULL, 0,
2043                                             NULL, 0);
2044
2045                 ieee802_1x_rekey(hapd, NULL);
2046
2047                 if (hapd->eapol_auth->default_wep_key == NULL)
2048                         return -1;
2049         }
2050
2051         return 0;
2052 }
2053
2054
2055 void ieee802_1x_deinit(struct hostapd_data *hapd)
2056 {
2057         eloop_cancel_timeout(ieee802_1x_rekey, hapd, NULL);
2058
2059         if (hapd->driver != NULL &&
2060             (hapd->conf->ieee802_1x || hapd->conf->wpa))
2061                 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0);
2062
2063         eapol_auth_deinit(hapd->eapol_auth);
2064         hapd->eapol_auth = NULL;
2065 }
2066
2067
2068 int ieee802_1x_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
2069                          const u8 *buf, size_t len, int ack)
2070 {
2071         struct ieee80211_hdr *hdr;
2072         u8 *pos;
2073         const unsigned char rfc1042_hdr[ETH_ALEN] =
2074                 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
2075
2076         if (sta == NULL)
2077                 return -1;
2078         if (len < sizeof(*hdr) + sizeof(rfc1042_hdr) + 2)
2079                 return 0;
2080
2081         hdr = (struct ieee80211_hdr *) buf;
2082         pos = (u8 *) (hdr + 1);
2083         if (os_memcmp(pos, rfc1042_hdr, sizeof(rfc1042_hdr)) != 0)
2084                 return 0;
2085         pos += sizeof(rfc1042_hdr);
2086         if (WPA_GET_BE16(pos) != ETH_P_PAE)
2087                 return 0;
2088         pos += 2;
2089
2090         return ieee802_1x_eapol_tx_status(hapd, sta, pos, buf + len - pos,
2091                                           ack);
2092 }
2093
2094
2095 int ieee802_1x_eapol_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
2096                                const u8 *buf, int len, int ack)
2097 {
2098         const struct ieee802_1x_hdr *xhdr =
2099                 (const struct ieee802_1x_hdr *) buf;
2100         const u8 *pos = buf + sizeof(*xhdr);
2101         struct ieee802_1x_eapol_key *key;
2102
2103         if (len < (int) sizeof(*xhdr))
2104                 return 0;
2105         wpa_printf(MSG_DEBUG, "IEEE 802.1X: " MACSTR " TX status - version=%d "
2106                    "type=%d length=%d - ack=%d",
2107                    MAC2STR(sta->addr), xhdr->version, xhdr->type,
2108                    be_to_host16(xhdr->length), ack);
2109
2110         if (xhdr->type != IEEE802_1X_TYPE_EAPOL_KEY)
2111                 return 0;
2112
2113         if (pos + sizeof(struct wpa_eapol_key) <= buf + len) {
2114                 const struct wpa_eapol_key *wpa;
2115                 wpa = (const struct wpa_eapol_key *) pos;
2116                 if (wpa->type == EAPOL_KEY_TYPE_RSN ||
2117                     wpa->type == EAPOL_KEY_TYPE_WPA)
2118                         wpa_auth_eapol_key_tx_status(hapd->wpa_auth,
2119                                                      sta->wpa_sm, ack);
2120         }
2121
2122         /* EAPOL EAP-Packet packets are eventually re-sent by either Supplicant
2123          * or Authenticator state machines, but EAPOL-Key packets are not
2124          * retransmitted in case of failure. Try to re-send failed EAPOL-Key
2125          * packets couple of times because otherwise STA keys become
2126          * unsynchronized with AP. */
2127         if (!ack && pos + sizeof(*key) <= buf + len) {
2128                 key = (struct ieee802_1x_eapol_key *) pos;
2129                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
2130                                HOSTAPD_LEVEL_DEBUG, "did not Ack EAPOL-Key "
2131                                "frame (%scast index=%d)",
2132                                key->key_index & BIT(7) ? "uni" : "broad",
2133                                key->key_index & ~BIT(7));
2134                 /* TODO: re-send EAPOL-Key couple of times (with short delay
2135                  * between them?). If all attempt fail, report error and
2136                  * deauthenticate STA so that it will get new keys when
2137                  * authenticating again (e.g., after returning in range).
2138                  * Separate limit/transmit state needed both for unicast and
2139                  * broadcast keys(?) */
2140         }
2141         /* TODO: could move unicast key configuration from ieee802_1x_tx_key()
2142          * to here and change the key only if the EAPOL-Key packet was Acked.
2143          */
2144
2145         return 1;
2146 }
2147
2148
2149 u8 * ieee802_1x_get_identity(struct eapol_state_machine *sm, size_t *len)
2150 {
2151         if (sm == NULL || sm->identity == NULL)
2152                 return NULL;
2153
2154         *len = sm->identity_len;
2155         return sm->identity;
2156 }
2157
2158
2159 u8 * ieee802_1x_get_radius_class(struct eapol_state_machine *sm, size_t *len,
2160                                  int idx)
2161 {
2162         if (sm == NULL || sm->radius_class.attr == NULL ||
2163             idx >= (int) sm->radius_class.count)
2164                 return NULL;
2165
2166         *len = sm->radius_class.attr[idx].len;
2167         return sm->radius_class.attr[idx].data;
2168 }
2169
2170
2171 struct wpabuf * ieee802_1x_get_radius_cui(struct eapol_state_machine *sm)
2172 {
2173         if (sm == NULL)
2174                 return NULL;
2175         return sm->radius_cui;
2176 }
2177
2178
2179 const u8 * ieee802_1x_get_key(struct eapol_state_machine *sm, size_t *len)
2180 {
2181         *len = 0;
2182         if (sm == NULL)
2183                 return NULL;
2184
2185         *len = sm->eap_if->eapKeyDataLen;
2186         return sm->eap_if->eapKeyData;
2187 }
2188
2189
2190 void ieee802_1x_notify_port_enabled(struct eapol_state_machine *sm,
2191                                     int enabled)
2192 {
2193         if (sm == NULL)
2194                 return;
2195         sm->eap_if->portEnabled = enabled ? TRUE : FALSE;
2196         eapol_auth_step(sm);
2197 }
2198
2199
2200 void ieee802_1x_notify_port_valid(struct eapol_state_machine *sm,
2201                                   int valid)
2202 {
2203         if (sm == NULL)
2204                 return;
2205         sm->portValid = valid ? TRUE : FALSE;
2206         eapol_auth_step(sm);
2207 }
2208
2209
2210 void ieee802_1x_notify_pre_auth(struct eapol_state_machine *sm, int pre_auth)
2211 {
2212         if (sm == NULL)
2213                 return;
2214         if (pre_auth)
2215                 sm->flags |= EAPOL_SM_PREAUTH;
2216         else
2217                 sm->flags &= ~EAPOL_SM_PREAUTH;
2218 }
2219
2220
2221 static const char * bool_txt(Boolean bool)
2222 {
2223         return bool ? "TRUE" : "FALSE";
2224 }
2225
2226
2227 int ieee802_1x_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
2228 {
2229         /* TODO */
2230         return 0;
2231 }
2232
2233
2234 int ieee802_1x_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
2235                            char *buf, size_t buflen)
2236 {
2237         int len = 0, ret;
2238         struct eapol_state_machine *sm = sta->eapol_sm;
2239         struct os_reltime diff;
2240         const char *name1;
2241         const char *name2;
2242
2243         if (sm == NULL)
2244                 return 0;
2245
2246         ret = os_snprintf(buf + len, buflen - len,
2247                           "dot1xPaePortNumber=%d\n"
2248                           "dot1xPaePortProtocolVersion=%d\n"
2249                           "dot1xPaePortCapabilities=1\n"
2250                           "dot1xPaePortInitialize=%d\n"
2251                           "dot1xPaePortReauthenticate=FALSE\n",
2252                           sta->aid,
2253                           EAPOL_VERSION,
2254                           sm->initialize);
2255         if (ret < 0 || (size_t) ret >= buflen - len)
2256                 return len;
2257         len += ret;
2258
2259         /* dot1xAuthConfigTable */
2260         ret = os_snprintf(buf + len, buflen - len,
2261                           "dot1xAuthPaeState=%d\n"
2262                           "dot1xAuthBackendAuthState=%d\n"
2263                           "dot1xAuthAdminControlledDirections=%d\n"
2264                           "dot1xAuthOperControlledDirections=%d\n"
2265                           "dot1xAuthAuthControlledPortStatus=%d\n"
2266                           "dot1xAuthAuthControlledPortControl=%d\n"
2267                           "dot1xAuthQuietPeriod=%u\n"
2268                           "dot1xAuthServerTimeout=%u\n"
2269                           "dot1xAuthReAuthPeriod=%u\n"
2270                           "dot1xAuthReAuthEnabled=%s\n"
2271                           "dot1xAuthKeyTxEnabled=%s\n",
2272                           sm->auth_pae_state + 1,
2273                           sm->be_auth_state + 1,
2274                           sm->adminControlledDirections,
2275                           sm->operControlledDirections,
2276                           sm->authPortStatus,
2277                           sm->portControl,
2278                           sm->quietPeriod,
2279                           sm->serverTimeout,
2280                           sm->reAuthPeriod,
2281                           bool_txt(sm->reAuthEnabled),
2282                           bool_txt(sm->keyTxEnabled));
2283         if (ret < 0 || (size_t) ret >= buflen - len)
2284                 return len;
2285         len += ret;
2286
2287         /* dot1xAuthStatsTable */
2288         ret = os_snprintf(buf + len, buflen - len,
2289                           "dot1xAuthEapolFramesRx=%u\n"
2290                           "dot1xAuthEapolFramesTx=%u\n"
2291                           "dot1xAuthEapolStartFramesRx=%u\n"
2292                           "dot1xAuthEapolLogoffFramesRx=%u\n"
2293                           "dot1xAuthEapolRespIdFramesRx=%u\n"
2294                           "dot1xAuthEapolRespFramesRx=%u\n"
2295                           "dot1xAuthEapolReqIdFramesTx=%u\n"
2296                           "dot1xAuthEapolReqFramesTx=%u\n"
2297                           "dot1xAuthInvalidEapolFramesRx=%u\n"
2298                           "dot1xAuthEapLengthErrorFramesRx=%u\n"
2299                           "dot1xAuthLastEapolFrameVersion=%u\n"
2300                           "dot1xAuthLastEapolFrameSource=" MACSTR "\n",
2301                           sm->dot1xAuthEapolFramesRx,
2302                           sm->dot1xAuthEapolFramesTx,
2303                           sm->dot1xAuthEapolStartFramesRx,
2304                           sm->dot1xAuthEapolLogoffFramesRx,
2305                           sm->dot1xAuthEapolRespIdFramesRx,
2306                           sm->dot1xAuthEapolRespFramesRx,
2307                           sm->dot1xAuthEapolReqIdFramesTx,
2308                           sm->dot1xAuthEapolReqFramesTx,
2309                           sm->dot1xAuthInvalidEapolFramesRx,
2310                           sm->dot1xAuthEapLengthErrorFramesRx,
2311                           sm->dot1xAuthLastEapolFrameVersion,
2312                           MAC2STR(sm->addr));
2313         if (ret < 0 || (size_t) ret >= buflen - len)
2314                 return len;
2315         len += ret;
2316
2317         /* dot1xAuthDiagTable */
2318         ret = os_snprintf(buf + len, buflen - len,
2319                           "dot1xAuthEntersConnecting=%u\n"
2320                           "dot1xAuthEapLogoffsWhileConnecting=%u\n"
2321                           "dot1xAuthEntersAuthenticating=%u\n"
2322                           "dot1xAuthAuthSuccessesWhileAuthenticating=%u\n"
2323                           "dot1xAuthAuthTimeoutsWhileAuthenticating=%u\n"
2324                           "dot1xAuthAuthFailWhileAuthenticating=%u\n"
2325                           "dot1xAuthAuthEapStartsWhileAuthenticating=%u\n"
2326                           "dot1xAuthAuthEapLogoffWhileAuthenticating=%u\n"
2327                           "dot1xAuthAuthReauthsWhileAuthenticated=%u\n"
2328                           "dot1xAuthAuthEapStartsWhileAuthenticated=%u\n"
2329                           "dot1xAuthAuthEapLogoffWhileAuthenticated=%u\n"
2330                           "dot1xAuthBackendResponses=%u\n"
2331                           "dot1xAuthBackendAccessChallenges=%u\n"
2332                           "dot1xAuthBackendOtherRequestsToSupplicant=%u\n"
2333                           "dot1xAuthBackendAuthSuccesses=%u\n"
2334                           "dot1xAuthBackendAuthFails=%u\n",
2335                           sm->authEntersConnecting,
2336                           sm->authEapLogoffsWhileConnecting,
2337                           sm->authEntersAuthenticating,
2338                           sm->authAuthSuccessesWhileAuthenticating,
2339                           sm->authAuthTimeoutsWhileAuthenticating,
2340                           sm->authAuthFailWhileAuthenticating,
2341                           sm->authAuthEapStartsWhileAuthenticating,
2342                           sm->authAuthEapLogoffWhileAuthenticating,
2343                           sm->authAuthReauthsWhileAuthenticated,
2344                           sm->authAuthEapStartsWhileAuthenticated,
2345                           sm->authAuthEapLogoffWhileAuthenticated,
2346                           sm->backendResponses,
2347                           sm->backendAccessChallenges,
2348                           sm->backendOtherRequestsToSupplicant,
2349                           sm->backendAuthSuccesses,
2350                           sm->backendAuthFails);
2351         if (ret < 0 || (size_t) ret >= buflen - len)
2352                 return len;
2353         len += ret;
2354
2355         /* dot1xAuthSessionStatsTable */
2356         os_reltime_age(&sta->acct_session_start, &diff);
2357         ret = os_snprintf(buf + len, buflen - len,
2358                           /* TODO: dot1xAuthSessionOctetsRx */
2359                           /* TODO: dot1xAuthSessionOctetsTx */
2360                           /* TODO: dot1xAuthSessionFramesRx */
2361                           /* TODO: dot1xAuthSessionFramesTx */
2362                           "dot1xAuthSessionId=%08X-%08X\n"
2363                           "dot1xAuthSessionAuthenticMethod=%d\n"
2364                           "dot1xAuthSessionTime=%u\n"
2365                           "dot1xAuthSessionTerminateCause=999\n"
2366                           "dot1xAuthSessionUserName=%s\n",
2367                           sta->acct_session_id_hi, sta->acct_session_id_lo,
2368                           (wpa_key_mgmt_wpa_ieee8021x(
2369                                    wpa_auth_sta_key_mgmt(sta->wpa_sm))) ?
2370                           1 : 2,
2371                           (unsigned int) diff.sec,
2372                           sm->identity);
2373         if (ret < 0 || (size_t) ret >= buflen - len)
2374                 return len;
2375         len += ret;
2376
2377         name1 = eap_server_get_name(0, sm->eap_type_authsrv);
2378         name2 = eap_server_get_name(0, sm->eap_type_supp);
2379         ret = os_snprintf(buf + len, buflen - len,
2380                           "last_eap_type_as=%d (%s)\n"
2381                           "last_eap_type_sta=%d (%s)\n",
2382                           sm->eap_type_authsrv,
2383                           name1 ? name1 : "",
2384                           sm->eap_type_supp,
2385                           name2 ? name2 : "");
2386         if (ret < 0 || (size_t) ret >= buflen - len)
2387                 return len;
2388         len += ret;
2389
2390         return len;
2391 }
2392
2393
2394 static void ieee802_1x_finished(struct hostapd_data *hapd,
2395                                 struct sta_info *sta, int success,
2396                                 int remediation)
2397 {
2398         const u8 *key;
2399         size_t len;
2400         /* TODO: get PMKLifetime from WPA parameters */
2401         static const int dot11RSNAConfigPMKLifetime = 43200;
2402         unsigned int session_timeout;
2403
2404 #ifdef CONFIG_HS20
2405         if (remediation && !sta->remediation) {
2406                 sta->remediation = 1;
2407                 os_free(sta->remediation_url);
2408                 sta->remediation_url =
2409                         os_strdup(hapd->conf->subscr_remediation_url);
2410                 sta->remediation_method = 1; /* SOAP-XML SPP */
2411         }
2412
2413         if (success) {
2414                 if (sta->remediation) {
2415                         wpa_printf(MSG_DEBUG, "HS 2.0: Send WNM-Notification "
2416                                    "to " MACSTR " to indicate Subscription "
2417                                    "Remediation",
2418                                    MAC2STR(sta->addr));
2419                         hs20_send_wnm_notification(hapd, sta->addr,
2420                                                    sta->remediation_method,
2421                                                    sta->remediation_url);
2422                         os_free(sta->remediation_url);
2423                         sta->remediation_url = NULL;
2424                 }
2425
2426                 if (sta->hs20_deauth_req) {
2427                         wpa_printf(MSG_DEBUG, "HS 2.0: Send WNM-Notification "
2428                                    "to " MACSTR " to indicate imminent "
2429                                    "deauthentication", MAC2STR(sta->addr));
2430                         hs20_send_wnm_notification_deauth_req(
2431                                 hapd, sta->addr, sta->hs20_deauth_req);
2432                 }
2433         }
2434 #endif /* CONFIG_HS20 */
2435
2436         key = ieee802_1x_get_key(sta->eapol_sm, &len);
2437         if (sta->session_timeout_set)
2438                 session_timeout = sta->session_timeout;
2439         else
2440                 session_timeout = dot11RSNAConfigPMKLifetime;
2441         if (success && key && len >= PMK_LEN && !sta->remediation &&
2442             !sta->hs20_deauth_requested &&
2443             wpa_auth_pmksa_add(sta->wpa_sm, key, session_timeout,
2444                                sta->eapol_sm) == 0) {
2445                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
2446                                HOSTAPD_LEVEL_DEBUG,
2447                                "Added PMKSA cache entry (IEEE 802.1X)");
2448         }
2449
2450         if (!success) {
2451                 /*
2452                  * Many devices require deauthentication after WPS provisioning
2453                  * and some may not be be able to do that themselves, so
2454                  * disconnect the client here. In addition, this may also
2455                  * benefit IEEE 802.1X/EAPOL authentication cases, too since
2456                  * the EAPOL PAE state machine would remain in HELD state for
2457                  * considerable amount of time and some EAP methods, like
2458                  * EAP-FAST with anonymous provisioning, may require another
2459                  * EAPOL authentication to be started to complete connection.
2460                  */
2461                 wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "IEEE 802.1X: Force "
2462                         "disconnection after EAP-Failure");
2463                 /* Add a small sleep to increase likelihood of previously
2464                  * requested EAP-Failure TX getting out before this should the
2465                  * driver reorder operations.
2466                  */
2467                 os_sleep(0, 10000);
2468                 ap_sta_disconnect(hapd, sta, sta->addr,
2469                                   WLAN_REASON_IEEE_802_1X_AUTH_FAILED);
2470                 hostapd_wps_eap_completed(hapd);
2471         }
2472 }