libeap/src/ap/ieee802_1x.c

   1 /*
   2  * hostapd / IEEE 802.1X-2004 Authenticator
   3  * Copyright (c) 2002-2012, Jouni Malinen <j@w1.fi>
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "utils/includes.h"
  10
  11 #include "utils/common.h"
  12 #include "utils/eloop.h"
  13 #include "crypto/md5.h"
  14 #include "crypto/crypto.h"
  15 #include "crypto/random.h"
  16 #include "common/ieee802_11_defs.h"
  17 #include "radius/radius.h"
  18 #include "radius/radius_client.h"
  19 #include "eap_server/eap.h"
  20 #include "eap_common/eap_wsc_common.h"
  21 #include "eapol_auth/eapol_auth_sm.h"
  22 #include "eapol_auth/eapol_auth_sm_i.h"
  23 #include "p2p/p2p.h"
  24 #include "hostapd.h"
  25 #include "accounting.h"
  26 #include "sta_info.h"
  27 #include "wpa_auth.h"
  28 #include "preauth_auth.h"
  29 #include "pmksa_cache_auth.h"
  30 #include "ap_config.h"
  31 #include "ap_drv_ops.h"
  32 #include "wps_hostapd.h"
  33 #include "hs20.h"
  34 #include "ieee802_1x.h"
  35
  36
  37 #ifdef CONFIG_HS20
  38 static void ieee802_1x_wnm_notif_send(void *eloop_ctx, void *timeout_ctx);
  39 #endif /* CONFIG_HS20 */
  40 static void ieee802_1x_finished(struct hostapd_data *hapd,
  41                                 struct sta_info *sta, int success,
  42                                 int remediation);
  43
  44
  45 static void ieee802_1x_send(struct hostapd_data *hapd, struct sta_info *sta,
  46                             u8 type, const u8 *data, size_t datalen)
  47 {
  48         u8 *buf;
  49         struct ieee802_1x_hdr *xhdr;
  50         size_t len;
  51         int encrypt = 0;
  52
  53         len = sizeof(*xhdr) + datalen;
  54         buf = os_zalloc(len);
  55         if (buf == NULL) {
  56                 wpa_printf(MSG_ERROR, "malloc() failed for "
  57                            "ieee802_1x_send(len=%lu)",
  58                            (unsigned long) len);
  59                 return;
  60         }
  61
  62         xhdr = (struct ieee802_1x_hdr *) buf;
  63         xhdr->version = hapd->conf->eapol_version;
  64         xhdr->type = type;
  65         xhdr->length = host_to_be16(datalen);
  66
  67         if (datalen > 0 && data != NULL)
  68                 os_memcpy(xhdr + 1, data, datalen);
  69
  70         if (wpa_auth_pairwise_set(sta->wpa_sm))
  71                 encrypt = 1;
  72 #ifdef CONFIG_TESTING_OPTIONS
  73         if (hapd->ext_eapol_frame_io) {
  74                 size_t hex_len = 2 * len + 1;
  75                 char *hex = os_malloc(hex_len);
  76
  77                 if (hex) {
  78                         wpa_snprintf_hex(hex, hex_len, buf, len);
  79                         wpa_msg(hapd->msg_ctx, MSG_INFO,
  80                                 "EAPOL-TX " MACSTR " %s",
  81                                 MAC2STR(sta->addr), hex);
  82                         os_free(hex);
  83                 }
  84         } else
  85 #endif /* CONFIG_TESTING_OPTIONS */
  86         if (sta->flags & WLAN_STA_PREAUTH) {
  87                 rsn_preauth_send(hapd, sta, buf, len);
  88         } else {
  89                 hostapd_drv_hapd_send_eapol(
  90                         hapd, sta->addr, buf, len,
  91                         encrypt, hostapd_sta_flags_to_drv(sta->flags));
  92         }
  93
  94         os_free(buf);
  95 }
  96
  97
  98 void ieee802_1x_set_sta_authorized(struct hostapd_data *hapd,
  99                                    struct sta_info *sta, int authorized)
 100 {
 101         int res;
 102
 103         if (sta->flags & WLAN_STA_PREAUTH)
 104                 return;
 105
 106         if (authorized) {
 107                 ap_sta_set_authorized(hapd, sta, 1);
 108                 res = hostapd_set_authorized(hapd, sta, 1);
 109                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 110                                HOSTAPD_LEVEL_DEBUG, "authorizing port");
 111         } else {
 112                 ap_sta_set_authorized(hapd, sta, 0);
 113                 res = hostapd_set_authorized(hapd, sta, 0);
 114                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 115                                HOSTAPD_LEVEL_DEBUG, "unauthorizing port");
 116         }
 117
 118         if (res && errno != ENOENT) {
 119                 wpa_printf(MSG_DEBUG, "Could not set station " MACSTR
 120                            " flags for kernel driver (errno=%d).",
 121                            MAC2STR(sta->addr), errno);
 122         }
 123
 124         if (authorized) {
 125                 os_get_reltime(&sta->connected_time);
 126                 accounting_sta_start(hapd, sta);
 127         }
 128 }
 129
 130
 131 #ifndef CONFIG_FIPS
 132 #ifndef CONFIG_NO_RC4
 133
 134 static void ieee802_1x_tx_key_one(struct hostapd_data *hapd,
 135                                   struct sta_info *sta,
 136                                   int idx, int broadcast,
 137                                   u8 *key_data, size_t key_len)
 138 {
 139         u8 *buf, *ekey;
 140         struct ieee802_1x_hdr *hdr;
 141         struct ieee802_1x_eapol_key *key;
 142         size_t len, ekey_len;
 143         struct eapol_state_machine *sm = sta->eapol_sm;
 144
 145         if (sm == NULL)
 146                 return;
 147
 148         len = sizeof(*key) + key_len;
 149         buf = os_zalloc(sizeof(*hdr) + len);
 150         if (buf == NULL)
 151                 return;
 152
 153         hdr = (struct ieee802_1x_hdr *) buf;
 154         key = (struct ieee802_1x_eapol_key *) (hdr + 1);
 155         key->type = EAPOL_KEY_TYPE_RC4;
 156         WPA_PUT_BE16(key->key_length, key_len);
 157         wpa_get_ntp_timestamp(key->replay_counter);
 158
 159         if (random_get_bytes(key->key_iv, sizeof(key->key_iv))) {
 160                 wpa_printf(MSG_ERROR, "Could not get random numbers");
 161                 os_free(buf);
 162                 return;
 163         }
 164
 165         key->key_index = idx | (broadcast ? 0 : BIT(7));
 166         if (hapd->conf->eapol_key_index_workaround) {
 167                 /* According to some information, WinXP Supplicant seems to
 168                  * interpret bit7 as an indication whether the key is to be
 169                  * activated, so make it possible to enable workaround that
 170                  * sets this bit for all keys. */
 171                 key->key_index |= BIT(7);
 172         }
 173
 174         /* Key is encrypted using "Key-IV + MSK[0..31]" as the RC4-key and
 175          * MSK[32..63] is used to sign the message. */
 176         if (sm->eap_if->eapKeyData == NULL || sm->eap_if->eapKeyDataLen < 64) {
 177                 wpa_printf(MSG_ERROR, "No eapKeyData available for encrypting "
 178                            "and signing EAPOL-Key");
 179                 os_free(buf);
 180                 return;
 181         }
 182         os_memcpy((u8 *) (key + 1), key_data, key_len);
 183         ekey_len = sizeof(key->key_iv) + 32;
 184         ekey = os_malloc(ekey_len);
 185         if (ekey == NULL) {
 186                 wpa_printf(MSG_ERROR, "Could not encrypt key");
 187                 os_free(buf);
 188                 return;
 189         }
 190         os_memcpy(ekey, key->key_iv, sizeof(key->key_iv));
 191         os_memcpy(ekey + sizeof(key->key_iv), sm->eap_if->eapKeyData, 32);
 192         rc4_skip(ekey, ekey_len, 0, (u8 *) (key + 1), key_len);
 193         os_free(ekey);
 194
 195         /* This header is needed here for HMAC-MD5, but it will be regenerated
 196          * in ieee802_1x_send() */
 197         hdr->version = hapd->conf->eapol_version;
 198         hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
 199         hdr->length = host_to_be16(len);
 200         hmac_md5(sm->eap_if->eapKeyData + 32, 32, buf, sizeof(*hdr) + len,
 201                  key->key_signature);
 202
 203         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key to " MACSTR
 204                    " (%s index=%d)", MAC2STR(sm->addr),
 205                    broadcast ? "broadcast" : "unicast", idx);
 206         ieee802_1x_send(hapd, sta, IEEE802_1X_TYPE_EAPOL_KEY, (u8 *) key, len);
 207         if (sta->eapol_sm)
 208                 sta->eapol_sm->dot1xAuthEapolFramesTx++;
 209         os_free(buf);
 210 }
 211
 212
 213 static void ieee802_1x_tx_key(struct hostapd_data *hapd, struct sta_info *sta)
 214 {
 215         struct eapol_authenticator *eapol = hapd->eapol_auth;
 216         struct eapol_state_machine *sm = sta->eapol_sm;
 217
 218         if (sm == NULL || !sm->eap_if->eapKeyData)
 219                 return;
 220
 221         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key(s) to " MACSTR,
 222                    MAC2STR(sta->addr));
 223
 224 #ifndef CONFIG_NO_VLAN
 225         if (sta->vlan_id > 0) {
 226                 wpa_printf(MSG_ERROR, "Using WEP with vlans is not supported.");
 227                 return;
 228         }
 229 #endif /* CONFIG_NO_VLAN */
 230
 231         if (eapol->default_wep_key) {
 232                 ieee802_1x_tx_key_one(hapd, sta, eapol->default_wep_key_idx, 1,
 233                                       eapol->default_wep_key,
 234                                       hapd->conf->default_wep_key_len);
 235         }
 236
 237         if (hapd->conf->individual_wep_key_len > 0) {
 238                 u8 *ikey;
 239                 ikey = os_malloc(hapd->conf->individual_wep_key_len);
 240                 if (ikey == NULL ||
 241                     random_get_bytes(ikey, hapd->conf->individual_wep_key_len))
 242                 {
 243                         wpa_printf(MSG_ERROR, "Could not generate random "
 244                                    "individual WEP key.");
 245                         os_free(ikey);
 246                         return;
 247                 }
 248
 249                 wpa_hexdump_key(MSG_DEBUG, "Individual WEP key",
 250                                 ikey, hapd->conf->individual_wep_key_len);
 251
 252                 ieee802_1x_tx_key_one(hapd, sta, 0, 0, ikey,
 253                                       hapd->conf->individual_wep_key_len);
 254
 255                 /* TODO: set encryption in TX callback, i.e., only after STA
 256                  * has ACKed EAPOL-Key frame */
 257                 if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
 258                                         sta->addr, 0, 1, NULL, 0, ikey,
 259                                         hapd->conf->individual_wep_key_len)) {
 260                         wpa_printf(MSG_ERROR, "Could not set individual WEP "
 261                                    "encryption.");
 262                 }
 263
 264                 os_free(ikey);
 265         }
 266 }
 267
 268 #endif /* CONFIG_NO_RC4 */
 269 #endif /* CONFIG_FIPS */
 270
 271
 272 const char *radius_mode_txt(struct hostapd_data *hapd)
 273 {
 274         switch (hapd->iface->conf->hw_mode) {
 275         case HOSTAPD_MODE_IEEE80211AD:
 276                 return "802.11ad";
 277         case HOSTAPD_MODE_IEEE80211A:
 278                 return "802.11a";
 279         case HOSTAPD_MODE_IEEE80211G:
 280                 return "802.11g";
 281         case HOSTAPD_MODE_IEEE80211B:
 282         default:
 283                 return "802.11b";
 284         }
 285 }
 286
 287
 288 int radius_sta_rate(struct hostapd_data *hapd, struct sta_info *sta)
 289 {
 290         int i;
 291         u8 rate = 0;
 292
 293         for (i = 0; i < sta->supported_rates_len; i++)
 294                 if ((sta->supported_rates[i] & 0x7f) > rate)
 295                         rate = sta->supported_rates[i] & 0x7f;
 296
 297         return rate;
 298 }
 299
 300
 301 #ifndef CONFIG_NO_RADIUS
 302 static void ieee802_1x_learn_identity(struct hostapd_data *hapd,
 303                                       struct eapol_state_machine *sm,
 304                                       const u8 *eap, size_t len)
 305 {
 306         const u8 *identity;
 307         size_t identity_len;
 308         const struct eap_hdr *hdr = (const struct eap_hdr *) eap;
 309
 310         if (len <= sizeof(struct eap_hdr) ||
 311             (hdr->code == EAP_CODE_RESPONSE &&
 312              eap[sizeof(struct eap_hdr)] != EAP_TYPE_IDENTITY) ||
 313             (hdr->code == EAP_CODE_INITIATE &&
 314              eap[sizeof(struct eap_hdr)] != EAP_ERP_TYPE_REAUTH) ||
 315             (hdr->code != EAP_CODE_RESPONSE &&
 316              hdr->code != EAP_CODE_INITIATE))
 317                 return;
 318
 319         identity = eap_get_identity(sm->eap, &identity_len);
 320         if (identity == NULL)
 321                 return;
 322
 323         /* Save station identity for future RADIUS packets */
 324         os_free(sm->identity);
 325         sm->identity = (u8 *) dup_binstr(identity, identity_len);
 326         if (sm->identity == NULL) {
 327                 sm->identity_len = 0;
 328                 return;
 329         }
 330
 331         sm->identity_len = identity_len;
 332         hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
 333                        HOSTAPD_LEVEL_DEBUG, "STA identity '%s'", sm->identity);
 334         sm->dot1xAuthEapolRespIdFramesRx++;
 335 }
 336
 337
 338 static int add_common_radius_sta_attr_rsn(struct hostapd_data *hapd,
 339                                           struct hostapd_radius_attr *req_attr,
 340                                           struct sta_info *sta,
 341                                           struct radius_msg *msg)
 342 {
 343         u32 suite;
 344         int ver, val;
 345
 346         ver = wpa_auth_sta_wpa_version(sta->wpa_sm);
 347         val = wpa_auth_get_pairwise(sta->wpa_sm);
 348         suite = wpa_cipher_to_suite(ver, val);
 349         if (val != -1 &&
 350             !hostapd_config_get_radius_attr(req_attr,
 351                                             RADIUS_ATTR_WLAN_PAIRWISE_CIPHER) &&
 352             !radius_msg_add_attr_int32(msg, RADIUS_ATTR_WLAN_PAIRWISE_CIPHER,
 353                                        suite)) {
 354                 wpa_printf(MSG_ERROR, "Could not add WLAN-Pairwise-Cipher");
 355                 return -1;
 356         }
 357
 358         suite = wpa_cipher_to_suite(((hapd->conf->wpa & 0x2) ||
 359                                      hapd->conf->osen) ?
 360                                     WPA_PROTO_RSN : WPA_PROTO_WPA,
 361                                     hapd->conf->wpa_group);
 362         if (!hostapd_config_get_radius_attr(req_attr,
 363                                             RADIUS_ATTR_WLAN_GROUP_CIPHER) &&
 364             !radius_msg_add_attr_int32(msg, RADIUS_ATTR_WLAN_GROUP_CIPHER,
 365                                        suite)) {
 366                 wpa_printf(MSG_ERROR, "Could not add WLAN-Group-Cipher");
 367                 return -1;
 368         }
 369
 370         val = wpa_auth_sta_key_mgmt(sta->wpa_sm);
 371         suite = wpa_akm_to_suite(val);
 372         if (val != -1 &&
 373             !hostapd_config_get_radius_attr(req_attr,
 374                                             RADIUS_ATTR_WLAN_AKM_SUITE) &&
 375             !radius_msg_add_attr_int32(msg, RADIUS_ATTR_WLAN_AKM_SUITE,
 376                                        suite)) {
 377                 wpa_printf(MSG_ERROR, "Could not add WLAN-AKM-Suite");
 378                 return -1;
 379         }
 380
 381 #ifdef CONFIG_IEEE80211W
 382         if (hapd->conf->ieee80211w != NO_MGMT_FRAME_PROTECTION) {
 383                 suite = wpa_cipher_to_suite(WPA_PROTO_RSN,
 384                                             hapd->conf->group_mgmt_cipher);
 385                 if (!hostapd_config_get_radius_attr(
 386                             req_attr, RADIUS_ATTR_WLAN_GROUP_MGMT_CIPHER) &&
 387                     !radius_msg_add_attr_int32(
 388                             msg, RADIUS_ATTR_WLAN_GROUP_MGMT_CIPHER, suite)) {
 389                         wpa_printf(MSG_ERROR,
 390                                    "Could not add WLAN-Group-Mgmt-Cipher");
 391                         return -1;
 392                 }
 393         }
 394 #endif /* CONFIG_IEEE80211W */
 395
 396         return 0;
 397 }
 398
 399
 400 static int add_common_radius_sta_attr(struct hostapd_data *hapd,
 401                                       struct hostapd_radius_attr *req_attr,
 402                                       struct sta_info *sta,
 403                                       struct radius_msg *msg)
 404 {
 405         char buf[128];
 406
 407         if (!hostapd_config_get_radius_attr(req_attr,
 408                                             RADIUS_ATTR_SERVICE_TYPE) &&
 409             !radius_msg_add_attr_int32(msg, RADIUS_ATTR_SERVICE_TYPE,
 410                                        RADIUS_SERVICE_TYPE_FRAMED)) {
 411                 wpa_printf(MSG_ERROR, "Could not add Service-Type");
 412                 return -1;
 413         }
 414
 415         if (!hostapd_config_get_radius_attr(req_attr,
 416                                             RADIUS_ATTR_NAS_PORT) &&
 417             sta->aid > 0 &&
 418             !radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT, sta->aid)) {
 419                 wpa_printf(MSG_ERROR, "Could not add NAS-Port");
 420                 return -1;
 421         }
 422
 423         os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
 424                     MAC2STR(sta->addr));
 425         buf[sizeof(buf) - 1] = '\0';
 426         if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID,
 427                                  (u8 *) buf, os_strlen(buf))) {
 428                 wpa_printf(MSG_ERROR, "Could not add Calling-Station-Id");
 429                 return -1;
 430         }
 431
 432         if (sta->flags & WLAN_STA_PREAUTH) {
 433                 os_strlcpy(buf, "IEEE 802.11i Pre-Authentication",
 434                            sizeof(buf));
 435         } else {
 436                 os_snprintf(buf, sizeof(buf), "CONNECT %d%sMbps %s",
 437                             radius_sta_rate(hapd, sta) / 2,
 438                             (radius_sta_rate(hapd, sta) & 1) ? ".5" : "",
 439                             radius_mode_txt(hapd));
 440                 buf[sizeof(buf) - 1] = '\0';
 441         }
 442         if (!hostapd_config_get_radius_attr(req_attr,
 443                                             RADIUS_ATTR_CONNECT_INFO) &&
 444             !radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO,
 445                                  (u8 *) buf, os_strlen(buf))) {
 446                 wpa_printf(MSG_ERROR, "Could not add Connect-Info");
 447                 return -1;
 448         }
 449
 450         if (sta->acct_session_id) {
 451                 os_snprintf(buf, sizeof(buf), "%016llX",
 452                             (unsigned long long) sta->acct_session_id);
 453                 if (!radius_msg_add_attr(msg, RADIUS_ATTR_ACCT_SESSION_ID,
 454                                          (u8 *) buf, os_strlen(buf))) {
 455                         wpa_printf(MSG_ERROR, "Could not add Acct-Session-Id");
 456                         return -1;
 457                 }
 458         }
 459
 460         if ((hapd->conf->wpa & 2) &&
 461             !hapd->conf->disable_pmksa_caching &&
 462             sta->eapol_sm && sta->eapol_sm->acct_multi_session_id) {
 463                 os_snprintf(buf, sizeof(buf), "%016llX",
 464                             (unsigned long long)
 465                             sta->eapol_sm->acct_multi_session_id);
 466                 if (!radius_msg_add_attr(
 467                             msg, RADIUS_ATTR_ACCT_MULTI_SESSION_ID,
 468                             (u8 *) buf, os_strlen(buf))) {
 469                         wpa_printf(MSG_INFO,
 470                                    "Could not add Acct-Multi-Session-Id");
 471                         return -1;
 472                 }
 473         }
 474
 475 #ifdef CONFIG_IEEE80211R
 476         if (hapd->conf->wpa && wpa_key_mgmt_ft(hapd->conf->wpa_key_mgmt) &&
 477             sta->wpa_sm &&
 478             (wpa_key_mgmt_ft(wpa_auth_sta_key_mgmt(sta->wpa_sm)) ||
 479              sta->auth_alg == WLAN_AUTH_FT) &&
 480             !hostapd_config_get_radius_attr(req_attr,
 481                                             RADIUS_ATTR_MOBILITY_DOMAIN_ID) &&
 482             !radius_msg_add_attr_int32(msg, RADIUS_ATTR_MOBILITY_DOMAIN_ID,
 483                                        WPA_GET_BE16(
 484                                                hapd->conf->mobility_domain))) {
 485                 wpa_printf(MSG_ERROR, "Could not add Mobility-Domain-Id");
 486                 return -1;
 487         }
 488 #endif /* CONFIG_IEEE80211R */
 489
 490         if ((hapd->conf->wpa || hapd->conf->osen) && sta->wpa_sm &&
 491             add_common_radius_sta_attr_rsn(hapd, req_attr, sta, msg) < 0)
 492                 return -1;
 493
 494         return 0;
 495 }
 496
 497
 498 int add_common_radius_attr(struct hostapd_data *hapd,
 499                            struct hostapd_radius_attr *req_attr,
 500                            struct sta_info *sta,
 501                            struct radius_msg *msg)
 502 {
 503         char buf[128];
 504         struct hostapd_radius_attr *attr;
 505         int len;
 506
 507         if (!hostapd_config_get_radius_attr(req_attr,
 508                                             RADIUS_ATTR_NAS_IP_ADDRESS) &&
 509             hapd->conf->own_ip_addr.af == AF_INET &&
 510             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS,
 511                                  (u8 *) &hapd->conf->own_ip_addr.u.v4, 4)) {
 512                 wpa_printf(MSG_ERROR, "Could not add NAS-IP-Address");
 513                 return -1;
 514         }
 515
 516 #ifdef CONFIG_IPV6
 517         if (!hostapd_config_get_radius_attr(req_attr,
 518                                             RADIUS_ATTR_NAS_IPV6_ADDRESS) &&
 519             hapd->conf->own_ip_addr.af == AF_INET6 &&
 520             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IPV6_ADDRESS,
 521                                  (u8 *) &hapd->conf->own_ip_addr.u.v6, 16)) {
 522                 wpa_printf(MSG_ERROR, "Could not add NAS-IPv6-Address");
 523                 return -1;
 524         }
 525 #endif /* CONFIG_IPV6 */
 526
 527         if (!hostapd_config_get_radius_attr(req_attr,
 528                                             RADIUS_ATTR_NAS_IDENTIFIER) &&
 529             hapd->conf->nas_identifier &&
 530             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IDENTIFIER,
 531                                  (u8 *) hapd->conf->nas_identifier,
 532                                  os_strlen(hapd->conf->nas_identifier))) {
 533                 wpa_printf(MSG_ERROR, "Could not add NAS-Identifier");
 534                 return -1;
 535         }
 536
 537         len = os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT ":",
 538                           MAC2STR(hapd->own_addr));
 539         os_memcpy(&buf[len], hapd->conf->ssid.ssid,
 540                   hapd->conf->ssid.ssid_len);
 541         len += hapd->conf->ssid.ssid_len;
 542         if (!hostapd_config_get_radius_attr(req_attr,
 543                                             RADIUS_ATTR_CALLED_STATION_ID) &&
 544             !radius_msg_add_attr(msg, RADIUS_ATTR_CALLED_STATION_ID,
 545                                  (u8 *) buf, len)) {
 546                 wpa_printf(MSG_ERROR, "Could not add Called-Station-Id");
 547                 return -1;
 548         }
 549
 550         if (!hostapd_config_get_radius_attr(req_attr,
 551                                             RADIUS_ATTR_NAS_PORT_TYPE) &&
 552             !radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT_TYPE,
 553                                        RADIUS_NAS_PORT_TYPE_IEEE_802_11)) {
 554                 wpa_printf(MSG_ERROR, "Could not add NAS-Port-Type");
 555                 return -1;
 556         }
 557
 558 #ifdef CONFIG_INTERWORKING
 559         if (hapd->conf->interworking &&
 560             !is_zero_ether_addr(hapd->conf->hessid)) {
 561                 os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
 562                             MAC2STR(hapd->conf->hessid));
 563                 buf[sizeof(buf) - 1] = '\0';
 564                 if (!hostapd_config_get_radius_attr(req_attr,
 565                                                     RADIUS_ATTR_WLAN_HESSID) &&
 566                     !radius_msg_add_attr(msg, RADIUS_ATTR_WLAN_HESSID,
 567                                          (u8 *) buf, os_strlen(buf))) {
 568                         wpa_printf(MSG_ERROR, "Could not add WLAN-HESSID");
 569                         return -1;
 570                 }
 571         }
 572 #endif /* CONFIG_INTERWORKING */
 573
 574         if (sta && add_common_radius_sta_attr(hapd, req_attr, sta, msg) < 0)
 575                 return -1;
 576
 577         for (attr = req_attr; attr; attr = attr->next) {
 578                 if (!radius_msg_add_attr(msg, attr->type,
 579                                          wpabuf_head(attr->val),
 580                                          wpabuf_len(attr->val))) {
 581                         wpa_printf(MSG_ERROR, "Could not add RADIUS "
 582                                    "attribute");
 583                         return -1;
 584                 }
 585         }
 586
 587         return 0;
 588 }
 589
 590
 591 static void ieee802_1x_encapsulate_radius(struct hostapd_data *hapd,
 592                                           struct sta_info *sta,
 593                                           const u8 *eap, size_t len)
 594 {
 595         struct radius_msg *msg;
 596         struct eapol_state_machine *sm = sta->eapol_sm;
 597
 598         if (sm == NULL)
 599                 return;
 600
 601         ieee802_1x_learn_identity(hapd, sm, eap, len);
 602
 603         wpa_printf(MSG_DEBUG, "Encapsulating EAP message into a RADIUS "
 604                    "packet");
 605
 606         sm->radius_identifier = radius_client_get_id(hapd->radius);
 607         msg = radius_msg_new(RADIUS_CODE_ACCESS_REQUEST,
 608                              sm->radius_identifier);
 609         if (msg == NULL) {
 610                 wpa_printf(MSG_INFO, "Could not create new RADIUS packet");
 611                 return;
 612         }
 613
 614         if (radius_msg_make_authenticator(msg) < 0) {
 615                 wpa_printf(MSG_INFO, "Could not make Request Authenticator");
 616                 goto fail;
 617         }
 618
 619         if (sm->identity &&
 620             !radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME,
 621                                  sm->identity, sm->identity_len)) {
 622                 wpa_printf(MSG_INFO, "Could not add User-Name");
 623                 goto fail;
 624         }
 625
 626         if (add_common_radius_attr(hapd, hapd->conf->radius_auth_req_attr, sta,
 627                                    msg) < 0)
 628                 goto fail;
 629
 630         /* TODO: should probably check MTU from driver config; 2304 is max for
 631          * IEEE 802.11, but use 1400 to avoid problems with too large packets
 632          */
 633         if (!hostapd_config_get_radius_attr(hapd->conf->radius_auth_req_attr,
 634                                             RADIUS_ATTR_FRAMED_MTU) &&
 635             !radius_msg_add_attr_int32(msg, RADIUS_ATTR_FRAMED_MTU, 1400)) {
 636                 wpa_printf(MSG_INFO, "Could not add Framed-MTU");
 637                 goto fail;
 638         }
 639
 640         if (!radius_msg_add_eap(msg, eap, len)) {
 641                 wpa_printf(MSG_INFO, "Could not add EAP-Message");
 642                 goto fail;
 643         }
 644
 645         /* State attribute must be copied if and only if this packet is
 646          * Access-Request reply to the previous Access-Challenge */
 647         if (sm->last_recv_radius &&
 648             radius_msg_get_hdr(sm->last_recv_radius)->code ==
 649             RADIUS_CODE_ACCESS_CHALLENGE) {
 650                 int res = radius_msg_copy_attr(msg, sm->last_recv_radius,
 651                                                RADIUS_ATTR_STATE);
 652                 if (res < 0) {
 653                         wpa_printf(MSG_INFO, "Could not copy State attribute from previous Access-Challenge");
 654                         goto fail;
 655                 }
 656                 if (res > 0) {
 657                         wpa_printf(MSG_DEBUG, "Copied RADIUS State Attribute");
 658                 }
 659         }
 660
 661         if (hapd->conf->radius_request_cui) {
 662                 const u8 *cui;
 663                 size_t cui_len;
 664                 /* Add previously learned CUI or nul CUI to request CUI */
 665                 if (sm->radius_cui) {
 666                         cui = wpabuf_head(sm->radius_cui);
 667                         cui_len = wpabuf_len(sm->radius_cui);
 668                 } else {
 669                         cui = (const u8 *) "\0";
 670                         cui_len = 1;
 671                 }
 672                 if (!radius_msg_add_attr(msg,
 673                                          RADIUS_ATTR_CHARGEABLE_USER_IDENTITY,
 674                                          cui, cui_len)) {
 675                         wpa_printf(MSG_ERROR, "Could not add CUI");
 676                         goto fail;
 677                 }
 678         }
 679
 680 #ifdef CONFIG_HS20
 681         if (hapd->conf->hs20) {
 682                 u8 ver = 1; /* Release 2 */
 683                 if (!radius_msg_add_wfa(
 684                             msg, RADIUS_VENDOR_ATTR_WFA_HS20_AP_VERSION,
 685                             &ver, 1)) {
 686                         wpa_printf(MSG_ERROR, "Could not add HS 2.0 AP "
 687                                    "version");
 688                         goto fail;
 689                 }
 690
 691                 if (sta->hs20_ie && wpabuf_len(sta->hs20_ie) > 0) {
 692                         const u8 *pos;
 693                         u8 buf[3];
 694                         u16 id;
 695                         pos = wpabuf_head_u8(sta->hs20_ie);
 696                         buf[0] = (*pos) >> 4;
 697                         if (((*pos) & HS20_PPS_MO_ID_PRESENT) &&
 698                             wpabuf_len(sta->hs20_ie) >= 3)
 699                                 id = WPA_GET_LE16(pos + 1);
 700                         else
 701                                 id = 0;
 702                         WPA_PUT_BE16(buf + 1, id);
 703                         if (!radius_msg_add_wfa(
 704                                     msg,
 705                                     RADIUS_VENDOR_ATTR_WFA_HS20_STA_VERSION,
 706                                     buf, sizeof(buf))) {
 707                                 wpa_printf(MSG_ERROR, "Could not add HS 2.0 "
 708                                            "STA version");
 709                                 goto fail;
 710                         }
 711                 }
 712         }
 713 #endif /* CONFIG_HS20 */
 714
 715         if (radius_client_send(hapd->radius, msg, RADIUS_AUTH, sta->addr) < 0)
 716                 goto fail;
 717
 718         return;
 719
 720  fail:
 721         radius_msg_free(msg);
 722 }
 723 #endif /* CONFIG_NO_RADIUS */
 724
 725
 726 static void handle_eap_response(struct hostapd_data *hapd,
 727                                 struct sta_info *sta, struct eap_hdr *eap,
 728                                 size_t len)
 729 {
 730         u8 type, *data;
 731         struct eapol_state_machine *sm = sta->eapol_sm;
 732         if (sm == NULL)
 733                 return;
 734
 735         data = (u8 *) (eap + 1);
 736
 737         if (len < sizeof(*eap) + 1) {
 738                 wpa_printf(MSG_INFO, "handle_eap_response: too short response data");
 739                 return;
 740         }
 741
 742         sm->eap_type_supp = type = data[0];
 743
 744         hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
 745                        HOSTAPD_LEVEL_DEBUG, "received EAP packet (code=%d "
 746                        "id=%d len=%d) from STA: EAP Response-%s (%d)",
 747                        eap->code, eap->identifier, be_to_host16(eap->length),
 748                        eap_server_get_name(0, type), type);
 749
 750         sm->dot1xAuthEapolRespFramesRx++;
 751
 752         wpabuf_free(sm->eap_if->eapRespData);
 753         sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len);
 754         sm->eapolEap = TRUE;
 755 }
 756
 757
 758 static void handle_eap_initiate(struct hostapd_data *hapd,
 759                                 struct sta_info *sta, struct eap_hdr *eap,
 760                                 size_t len)
 761 {
 762 #ifdef CONFIG_ERP
 763         u8 type, *data;
 764         struct eapol_state_machine *sm = sta->eapol_sm;
 765
 766         if (sm == NULL)
 767                 return;
 768
 769         if (len < sizeof(*eap) + 1) {
 770                 wpa_printf(MSG_INFO,
 771                            "handle_eap_initiate: too short response data");
 772                 return;
 773         }
 774
 775         data = (u8 *) (eap + 1);
 776         type = data[0];
 777
 778         hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
 779                        HOSTAPD_LEVEL_DEBUG, "received EAP packet (code=%d "
 780                        "id=%d len=%d) from STA: EAP Initiate type %u",
 781                        eap->code, eap->identifier, be_to_host16(eap->length),
 782                        type);
 783
 784         wpabuf_free(sm->eap_if->eapRespData);
 785         sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len);
 786         sm->eapolEap = TRUE;
 787 #endif /* CONFIG_ERP */
 788 }
 789
 790
 791 /* Process incoming EAP packet from Supplicant */
 792 static void handle_eap(struct hostapd_data *hapd, struct sta_info *sta,
 793                        u8 *buf, size_t len)
 794 {
 795         struct eap_hdr *eap;
 796         u16 eap_len;
 797
 798         if (len < sizeof(*eap)) {
 799                 wpa_printf(MSG_INFO, "   too short EAP packet");
 800                 return;
 801         }
 802
 803         eap = (struct eap_hdr *) buf;
 804
 805         eap_len = be_to_host16(eap->length);
 806         wpa_printf(MSG_DEBUG, "EAP: code=%d identifier=%d length=%d",
 807                    eap->code, eap->identifier, eap_len);
 808         if (eap_len < sizeof(*eap)) {
 809                 wpa_printf(MSG_DEBUG, "   Invalid EAP length");
 810                 return;
 811         } else if (eap_len > len) {
 812                 wpa_printf(MSG_DEBUG, "   Too short frame to contain this EAP "
 813                            "packet");
 814                 return;
 815         } else if (eap_len < len) {
 816                 wpa_printf(MSG_DEBUG, "   Ignoring %lu extra bytes after EAP "
 817                            "packet", (unsigned long) len - eap_len);
 818         }
 819
 820         switch (eap->code) {
 821         case EAP_CODE_REQUEST:
 822                 wpa_printf(MSG_DEBUG, " (request)");
 823                 return;
 824         case EAP_CODE_RESPONSE:
 825                 wpa_printf(MSG_DEBUG, " (response)");
 826                 handle_eap_response(hapd, sta, eap, eap_len);
 827                 break;
 828         case EAP_CODE_SUCCESS:
 829                 wpa_printf(MSG_DEBUG, " (success)");
 830                 return;
 831         case EAP_CODE_FAILURE:
 832                 wpa_printf(MSG_DEBUG, " (failure)");
 833                 return;
 834         case EAP_CODE_INITIATE:
 835                 wpa_printf(MSG_DEBUG, " (initiate)");
 836                 handle_eap_initiate(hapd, sta, eap, eap_len);
 837                 break;
 838         case EAP_CODE_FINISH:
 839                 wpa_printf(MSG_DEBUG, " (finish)");
 840                 break;
 841         default:
 842                 wpa_printf(MSG_DEBUG, " (unknown code)");
 843                 return;
 844         }
 845 }
 846
 847
 848 static struct eapol_state_machine *
 849 ieee802_1x_alloc_eapol_sm(struct hostapd_data *hapd, struct sta_info *sta)
 850 {
 851         int flags = 0;
 852         if (sta->flags & WLAN_STA_PREAUTH)
 853                 flags |= EAPOL_SM_PREAUTH;
 854         if (sta->wpa_sm) {
 855                 flags |= EAPOL_SM_USES_WPA;
 856                 if (wpa_auth_sta_get_pmksa(sta->wpa_sm))
 857                         flags |= EAPOL_SM_FROM_PMKSA_CACHE;
 858         }
 859         return eapol_auth_alloc(hapd->eapol_auth, sta->addr, flags,
 860                                 sta->wps_ie, sta->p2p_ie, sta,
 861                                 sta->identity, sta->radius_cui);
 862 }
 863
 864
 865 static void ieee802_1x_save_eapol(struct sta_info *sta, const u8 *buf,
 866                                   size_t len)
 867 {
 868         if (sta->pending_eapol_rx) {
 869                 wpabuf_free(sta->pending_eapol_rx->buf);
 870         } else {
 871                 sta->pending_eapol_rx =
 872                         os_malloc(sizeof(*sta->pending_eapol_rx));
 873                 if (!sta->pending_eapol_rx)
 874                         return;
 875         }
 876
 877         sta->pending_eapol_rx->buf = wpabuf_alloc_copy(buf, len);
 878         if (!sta->pending_eapol_rx->buf) {
 879                 os_free(sta->pending_eapol_rx);
 880                 sta->pending_eapol_rx = NULL;
 881                 return;
 882         }
 883
 884         os_get_reltime(&sta->pending_eapol_rx->rx_time);
 885 }
 886
 887
 888 /**
 889  * ieee802_1x_receive - Process the EAPOL frames from the Supplicant
 890  * @hapd: hostapd BSS data
 891  * @sa: Source address (sender of the EAPOL frame)
 892  * @buf: EAPOL frame
 893  * @len: Length of buf in octets
 894  *
 895  * This function is called for each incoming EAPOL frame from the interface
 896  */
 897 void ieee802_1x_receive(struct hostapd_data *hapd, const u8 *sa, const u8 *buf,
 898                         size_t len)
 899 {
 900         struct sta_info *sta;
 901         struct ieee802_1x_hdr *hdr;
 902         struct ieee802_1x_eapol_key *key;
 903         u16 datalen;
 904         struct rsn_pmksa_cache_entry *pmksa;
 905         int key_mgmt;
 906
 907         if (!hapd->conf->ieee802_1x && !hapd->conf->wpa && !hapd->conf->osen &&
 908             !hapd->conf->wps_state)
 909                 return;
 910
 911         wpa_printf(MSG_DEBUG, "IEEE 802.1X: %lu bytes from " MACSTR,
 912                    (unsigned long) len, MAC2STR(sa));
 913         sta = ap_get_sta(hapd, sa);
 914         if (!sta || (!(sta->flags & (WLAN_STA_ASSOC | WLAN_STA_PREAUTH)) &&
 915                      !(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_WIRED))) {
 916                 wpa_printf(MSG_DEBUG, "IEEE 802.1X data frame from not "
 917                            "associated/Pre-authenticating STA");
 918
 919                 if (sta && (sta->flags & WLAN_STA_AUTH)) {
 920                         wpa_printf(MSG_DEBUG, "Saving EAPOL frame from " MACSTR
 921                                    " for later use", MAC2STR(sta->addr));
 922                         ieee802_1x_save_eapol(sta, buf, len);
 923                 }
 924
 925                 return;
 926         }
 927
 928         if (len < sizeof(*hdr)) {
 929                 wpa_printf(MSG_INFO, "   too short IEEE 802.1X packet");
 930                 return;
 931         }
 932
 933         hdr = (struct ieee802_1x_hdr *) buf;
 934         datalen = be_to_host16(hdr->length);
 935         wpa_printf(MSG_DEBUG, "   IEEE 802.1X: version=%d type=%d length=%d",
 936                    hdr->version, hdr->type, datalen);
 937
 938         if (len - sizeof(*hdr) < datalen) {
 939                 wpa_printf(MSG_INFO, "   frame too short for this IEEE 802.1X packet");
 940                 if (sta->eapol_sm)
 941                         sta->eapol_sm->dot1xAuthEapLengthErrorFramesRx++;
 942                 return;
 943         }
 944         if (len - sizeof(*hdr) > datalen) {
 945                 wpa_printf(MSG_DEBUG, "   ignoring %lu extra octets after "
 946                            "IEEE 802.1X packet",
 947                            (unsigned long) len - sizeof(*hdr) - datalen);
 948         }
 949
 950         if (sta->eapol_sm) {
 951                 sta->eapol_sm->dot1xAuthLastEapolFrameVersion = hdr->version;
 952                 sta->eapol_sm->dot1xAuthEapolFramesRx++;
 953         }
 954
 955         key = (struct ieee802_1x_eapol_key *) (hdr + 1);
 956         if (datalen >= sizeof(struct ieee802_1x_eapol_key) &&
 957             hdr->type == IEEE802_1X_TYPE_EAPOL_KEY &&
 958             (key->type == EAPOL_KEY_TYPE_WPA ||
 959              key->type == EAPOL_KEY_TYPE_RSN)) {
 960                 wpa_receive(hapd->wpa_auth, sta->wpa_sm, (u8 *) hdr,
 961                             sizeof(*hdr) + datalen);
 962                 return;
 963         }
 964
 965         if (!hapd->conf->ieee802_1x && !hapd->conf->osen &&
 966             !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) {
 967                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore EAPOL message - "
 968                            "802.1X not enabled and WPS not used");
 969                 return;
 970         }
 971
 972         key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm);
 973         if (key_mgmt != -1 && wpa_key_mgmt_wpa_psk(key_mgmt)) {
 974                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore EAPOL message - "
 975                            "STA is using PSK");
 976                 return;
 977         }
 978
 979         if (!sta->eapol_sm) {
 980                 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
 981                 if (!sta->eapol_sm)
 982                         return;
 983
 984 #ifdef CONFIG_WPS
 985                 if (!hapd->conf->ieee802_1x && hapd->conf->wps_state) {
 986                         u32 wflags = sta->flags & (WLAN_STA_WPS |
 987                                                    WLAN_STA_WPS2 |
 988                                                    WLAN_STA_MAYBE_WPS);
 989                         if (wflags == WLAN_STA_MAYBE_WPS ||
 990                             wflags == (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) {
 991                                 /*
 992                                  * Delay EAPOL frame transmission until a
 993                                  * possible WPS STA initiates the handshake
 994                                  * with EAPOL-Start. Only allow the wait to be
 995                                  * skipped if the STA is known to support WPS
 996                                  * 2.0.
 997                                  */
 998                                 wpa_printf(MSG_DEBUG, "WPS: Do not start "
 999                                            "EAPOL until EAPOL-Start is "
1000                                            "received");
1001                                 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
1002                         }
1003                 }
1004 #endif /* CONFIG_WPS */
1005
1006                 sta->eapol_sm->eap_if->portEnabled = TRUE;
1007         }
1008
1009         /* since we support version 1, we can ignore version field and proceed
1010          * as specified in version 1 standard [IEEE Std 802.1X-2001, 7.5.5] */
1011         /* TODO: actually, we are not version 1 anymore.. However, Version 2
1012          * does not change frame contents, so should be ok to process frames
1013          * more or less identically. Some changes might be needed for
1014          * verification of fields. */
1015
1016         switch (hdr->type) {
1017         case IEEE802_1X_TYPE_EAP_PACKET:
1018                 handle_eap(hapd, sta, (u8 *) (hdr + 1), datalen);
1019                 break;
1020
1021         case IEEE802_1X_TYPE_EAPOL_START:
1022                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1023                                HOSTAPD_LEVEL_DEBUG, "received EAPOL-Start "
1024                                "from STA");
1025                 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
1026                 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
1027                 if (pmksa) {
1028                         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
1029                                        HOSTAPD_LEVEL_DEBUG, "cached PMKSA "
1030                                        "available - ignore it since "
1031                                        "STA sent EAPOL-Start");
1032                         wpa_auth_sta_clear_pmksa(sta->wpa_sm, pmksa);
1033                 }
1034                 sta->eapol_sm->eapolStart = TRUE;
1035                 sta->eapol_sm->dot1xAuthEapolStartFramesRx++;
1036                 eap_server_clear_identity(sta->eapol_sm->eap);
1037                 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
1038                 break;
1039
1040         case IEEE802_1X_TYPE_EAPOL_LOGOFF:
1041                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1042                                HOSTAPD_LEVEL_DEBUG, "received EAPOL-Logoff "
1043                                "from STA");
1044                 sta->acct_terminate_cause =
1045                         RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
1046                 accounting_sta_stop(hapd, sta);
1047                 sta->eapol_sm->eapolLogoff = TRUE;
1048                 sta->eapol_sm->dot1xAuthEapolLogoffFramesRx++;
1049                 eap_server_clear_identity(sta->eapol_sm->eap);
1050                 break;
1051
1052         case IEEE802_1X_TYPE_EAPOL_KEY:
1053                 wpa_printf(MSG_DEBUG, "   EAPOL-Key");
1054                 if (!ap_sta_is_authorized(sta)) {
1055                         wpa_printf(MSG_DEBUG, "   Dropped key data from "
1056                                    "unauthorized Supplicant");
1057                         break;
1058                 }
1059                 break;
1060
1061         case IEEE802_1X_TYPE_EAPOL_ENCAPSULATED_ASF_ALERT:
1062                 wpa_printf(MSG_DEBUG, "   EAPOL-Encapsulated-ASF-Alert");
1063                 /* TODO: implement support for this; show data */
1064                 break;
1065
1066         default:
1067                 wpa_printf(MSG_DEBUG, "   unknown IEEE 802.1X packet type");
1068                 sta->eapol_sm->dot1xAuthInvalidEapolFramesRx++;
1069                 break;
1070         }
1071
1072         eapol_auth_step(sta->eapol_sm);
1073 }
1074
1075
1076 /**
1077  * ieee802_1x_new_station - Start IEEE 802.1X authentication
1078  * @hapd: hostapd BSS data
1079  * @sta: The station
1080  *
1081  * This function is called to start IEEE 802.1X authentication when a new
1082  * station completes IEEE 802.11 association.
1083  */
1084 void ieee802_1x_new_station(struct hostapd_data *hapd, struct sta_info *sta)
1085 {
1086         struct rsn_pmksa_cache_entry *pmksa;
1087         int reassoc = 1;
1088         int force_1x = 0;
1089         int key_mgmt;
1090
1091 #ifdef CONFIG_WPS
1092         if (hapd->conf->wps_state &&
1093             ((hapd->conf->wpa && (sta->flags & WLAN_STA_MAYBE_WPS)) ||
1094              (sta->flags & WLAN_STA_WPS))) {
1095                 /*
1096                  * Need to enable IEEE 802.1X/EAPOL state machines for possible
1097                  * WPS handshake even if IEEE 802.1X/EAPOL is not used for
1098                  * authentication in this BSS.
1099                  */
1100                 force_1x = 1;
1101         }
1102 #endif /* CONFIG_WPS */
1103
1104         if (!force_1x && !hapd->conf->ieee802_1x && !hapd->conf->osen) {
1105                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - "
1106                            "802.1X not enabled or forced for WPS");
1107                 /*
1108                  * Clear any possible EAPOL authenticator state to support
1109                  * reassociation change from WPS to PSK.
1110                  */
1111                 ieee802_1x_free_station(hapd, sta);
1112                 return;
1113         }
1114
1115         key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm);
1116         if (key_mgmt != -1 && wpa_key_mgmt_wpa_psk(key_mgmt)) {
1117                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - using PSK");
1118                 /*
1119                  * Clear any possible EAPOL authenticator state to support
1120                  * reassociation change from WPA-EAP to PSK.
1121                  */
1122                 ieee802_1x_free_station(hapd, sta);
1123                 return;
1124         }
1125
1126         if (sta->eapol_sm == NULL) {
1127                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1128                                HOSTAPD_LEVEL_DEBUG, "start authentication");
1129                 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
1130                 if (sta->eapol_sm == NULL) {
1131                         hostapd_logger(hapd, sta->addr,
1132                                        HOSTAPD_MODULE_IEEE8021X,
1133                                        HOSTAPD_LEVEL_INFO,
1134                                        "failed to allocate state machine");
1135                         return;
1136                 }
1137                 reassoc = 0;
1138         }
1139
1140 #ifdef CONFIG_WPS
1141         sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
1142         if (!hapd->conf->ieee802_1x && hapd->conf->wps_state &&
1143             !(sta->flags & WLAN_STA_WPS2)) {
1144                 /*
1145                  * Delay EAPOL frame transmission until a possible WPS STA
1146                  * initiates the handshake with EAPOL-Start. Only allow the
1147                  * wait to be skipped if the STA is known to support WPS 2.0.
1148                  */
1149                 wpa_printf(MSG_DEBUG, "WPS: Do not start EAPOL until "
1150                            "EAPOL-Start is received");
1151                 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
1152         }
1153 #endif /* CONFIG_WPS */
1154
1155         sta->eapol_sm->eap_if->portEnabled = TRUE;
1156
1157 #ifdef CONFIG_IEEE80211R
1158         if (sta->auth_alg == WLAN_AUTH_FT) {
1159                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1160                                HOSTAPD_LEVEL_DEBUG,
1161                                "PMK from FT - skip IEEE 802.1X/EAP");
1162                 /* Setup EAPOL state machines to already authenticated state
1163                  * because of existing FT information from R0KH. */
1164                 sta->eapol_sm->keyRun = TRUE;
1165                 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
1166                 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
1167                 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
1168                 sta->eapol_sm->authSuccess = TRUE;
1169                 sta->eapol_sm->authFail = FALSE;
1170                 sta->eapol_sm->portValid = TRUE;
1171                 if (sta->eapol_sm->eap)
1172                         eap_sm_notify_cached(sta->eapol_sm->eap);
1173                 /* TODO: get vlan_id from R0KH using RRB message */
1174                 return;
1175         }
1176 #endif /* CONFIG_IEEE80211R */
1177
1178         pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
1179         if (pmksa) {
1180                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1181                                HOSTAPD_LEVEL_DEBUG,
1182                                "PMK from PMKSA cache - skip IEEE 802.1X/EAP");
1183                 /* Setup EAPOL state machines to already authenticated state
1184                  * because of existing PMKSA information in the cache. */
1185                 sta->eapol_sm->keyRun = TRUE;
1186                 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
1187                 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
1188                 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
1189                 sta->eapol_sm->authSuccess = TRUE;
1190                 sta->eapol_sm->authFail = FALSE;
1191                 if (sta->eapol_sm->eap)
1192                         eap_sm_notify_cached(sta->eapol_sm->eap);
1193                 pmksa_cache_to_eapol_data(hapd, pmksa, sta->eapol_sm);
1194                 ap_sta_bind_vlan(hapd, sta);
1195         } else {
1196                 if (reassoc) {
1197                         /*
1198                          * Force EAPOL state machines to start
1199                          * re-authentication without having to wait for the
1200                          * Supplicant to send EAPOL-Start.
1201                          */
1202                         sta->eapol_sm->reAuthenticate = TRUE;
1203                 }
1204                 eapol_auth_step(sta->eapol_sm);
1205         }
1206 }
1207
1208
1209 void ieee802_1x_free_station(struct hostapd_data *hapd, struct sta_info *sta)
1210 {
1211         struct eapol_state_machine *sm = sta->eapol_sm;
1212
1213 #ifdef CONFIG_HS20
1214         eloop_cancel_timeout(ieee802_1x_wnm_notif_send, hapd, sta);
1215 #endif /* CONFIG_HS20 */
1216
1217         if (sta->pending_eapol_rx) {
1218                 wpabuf_free(sta->pending_eapol_rx->buf);
1219                 os_free(sta->pending_eapol_rx);
1220                 sta->pending_eapol_rx = NULL;
1221         }
1222
1223         if (sm == NULL)
1224                 return;
1225
1226         sta->eapol_sm = NULL;
1227
1228 #ifndef CONFIG_NO_RADIUS
1229         radius_msg_free(sm->last_recv_radius);
1230         radius_free_class(&sm->radius_class);
1231 #endif /* CONFIG_NO_RADIUS */
1232
1233         eapol_auth_free(sm);
1234 }
1235
1236
1237 #ifndef CONFIG_NO_RADIUS
1238 static void ieee802_1x_decapsulate_radius(struct hostapd_data *hapd,
1239                                           struct sta_info *sta)
1240 {
1241         struct wpabuf *eap;
1242         const struct eap_hdr *hdr;
1243         int eap_type = -1;
1244         char buf[64];
1245         struct radius_msg *msg;
1246         struct eapol_state_machine *sm = sta->eapol_sm;
1247
1248         if (sm == NULL || sm->last_recv_radius == NULL) {
1249                 if (sm)
1250                         sm->eap_if->aaaEapNoReq = TRUE;
1251                 return;
1252         }
1253
1254         msg = sm->last_recv_radius;
1255
1256         eap = radius_msg_get_eap(msg);
1257         if (eap == NULL) {
1258                 /* RFC 3579, Chap. 2.6.3:
1259                  * RADIUS server SHOULD NOT send Access-Reject/no EAP-Message
1260                  * attribute */
1261                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1262                                HOSTAPD_LEVEL_WARNING, "could not extract "
1263                                "EAP-Message from RADIUS message");
1264                 sm->eap_if->aaaEapNoReq = TRUE;
1265                 return;
1266         }
1267
1268         if (wpabuf_len(eap) < sizeof(*hdr)) {
1269                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1270                                HOSTAPD_LEVEL_WARNING, "too short EAP packet "
1271                                "received from authentication server");
1272                 wpabuf_free(eap);
1273                 sm->eap_if->aaaEapNoReq = TRUE;
1274                 return;
1275         }
1276
1277         if (wpabuf_len(eap) > sizeof(*hdr))
1278                 eap_type = (wpabuf_head_u8(eap))[sizeof(*hdr)];
1279
1280         hdr = wpabuf_head(eap);
1281         switch (hdr->code) {
1282         case EAP_CODE_REQUEST:
1283                 if (eap_type >= 0)
1284                         sm->eap_type_authsrv = eap_type;
1285                 os_snprintf(buf, sizeof(buf), "EAP-Request-%s (%d)",
1286                             eap_server_get_name(0, eap_type), eap_type);
1287                 break;
1288         case EAP_CODE_RESPONSE:
1289                 os_snprintf(buf, sizeof(buf), "EAP Response-%s (%d)",
1290                             eap_server_get_name(0, eap_type), eap_type);
1291                 break;
1292         case EAP_CODE_SUCCESS:
1293                 os_strlcpy(buf, "EAP Success", sizeof(buf));
1294                 break;
1295         case EAP_CODE_FAILURE:
1296                 os_strlcpy(buf, "EAP Failure", sizeof(buf));
1297                 break;
1298         default:
1299                 os_strlcpy(buf, "unknown EAP code", sizeof(buf));
1300                 break;
1301         }
1302         buf[sizeof(buf) - 1] = '\0';
1303         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1304                        HOSTAPD_LEVEL_DEBUG, "decapsulated EAP packet (code=%d "
1305                        "id=%d len=%d) from RADIUS server: %s",
1306                        hdr->code, hdr->identifier, be_to_host16(hdr->length),
1307                        buf);
1308         sm->eap_if->aaaEapReq = TRUE;
1309
1310         wpabuf_free(sm->eap_if->aaaEapReqData);
1311         sm->eap_if->aaaEapReqData = eap;
1312 }
1313
1314
1315 static void ieee802_1x_get_keys(struct hostapd_data *hapd,
1316                                 struct sta_info *sta, struct radius_msg *msg,
1317                                 struct radius_msg *req,
1318                                 const u8 *shared_secret,
1319                                 size_t shared_secret_len)
1320 {
1321         struct radius_ms_mppe_keys *keys;
1322         struct eapol_state_machine *sm = sta->eapol_sm;
1323         if (sm == NULL)
1324                 return;
1325
1326         keys = radius_msg_get_ms_keys(msg, req, shared_secret,
1327                                       shared_secret_len);
1328
1329         if (keys && keys->send && keys->recv) {
1330                 size_t len = keys->send_len + keys->recv_len;
1331                 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Send-Key",
1332                                 keys->send, keys->send_len);
1333                 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Recv-Key",
1334                                 keys->recv, keys->recv_len);
1335
1336                 os_free(sm->eap_if->aaaEapKeyData);
1337                 sm->eap_if->aaaEapKeyData = os_malloc(len);
1338                 if (sm->eap_if->aaaEapKeyData) {
1339                         os_memcpy(sm->eap_if->aaaEapKeyData, keys->recv,
1340                                   keys->recv_len);
1341                         os_memcpy(sm->eap_if->aaaEapKeyData + keys->recv_len,
1342                                   keys->send, keys->send_len);
1343                         sm->eap_if->aaaEapKeyDataLen = len;
1344                         sm->eap_if->aaaEapKeyAvailable = TRUE;
1345                 }
1346         } else {
1347                 wpa_printf(MSG_DEBUG,
1348                            "MS-MPPE: 1x_get_keys, could not get keys: %p  send: %p  recv: %p",
1349                            keys, keys ? keys->send : NULL,
1350                            keys ? keys->recv : NULL);
1351         }
1352
1353         if (keys) {
1354                 os_free(keys->send);
1355                 os_free(keys->recv);
1356                 os_free(keys);
1357         }
1358 }
1359
1360
1361 static void ieee802_1x_store_radius_class(struct hostapd_data *hapd,
1362                                           struct sta_info *sta,
1363                                           struct radius_msg *msg)
1364 {
1365         u8 *attr_class;
1366         size_t class_len;
1367         struct eapol_state_machine *sm = sta->eapol_sm;
1368         int count, i;
1369         struct radius_attr_data *nclass;
1370         size_t nclass_count;
1371
1372         if (!hapd->conf->radius->acct_server || hapd->radius == NULL ||
1373             sm == NULL)
1374                 return;
1375
1376         radius_free_class(&sm->radius_class);
1377         count = radius_msg_count_attr(msg, RADIUS_ATTR_CLASS, 1);
1378         if (count <= 0)
1379                 return;
1380
1381         nclass = os_calloc(count, sizeof(struct radius_attr_data));
1382         if (nclass == NULL)
1383                 return;
1384
1385         nclass_count = 0;
1386
1387         attr_class = NULL;
1388         for (i = 0; i < count; i++) {
1389                 do {
1390                         if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CLASS,
1391                                                     &attr_class, &class_len,
1392                                                     attr_class) < 0) {
1393                                 i = count;
1394                                 break;
1395                         }
1396                 } while (class_len < 1);
1397
1398                 nclass[nclass_count].data = os_malloc(class_len);
1399                 if (nclass[nclass_count].data == NULL)
1400                         break;
1401
1402                 os_memcpy(nclass[nclass_count].data, attr_class, class_len);
1403                 nclass[nclass_count].len = class_len;
1404                 nclass_count++;
1405         }
1406
1407         sm->radius_class.attr = nclass;
1408         sm->radius_class.count = nclass_count;
1409         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Stored %lu RADIUS Class "
1410                    "attributes for " MACSTR,
1411                    (unsigned long) sm->radius_class.count,
1412                    MAC2STR(sta->addr));
1413 }
1414
1415
1416 /* Update sta->identity based on User-Name attribute in Access-Accept */
1417 static void ieee802_1x_update_sta_identity(struct hostapd_data *hapd,
1418                                            struct sta_info *sta,
1419                                            struct radius_msg *msg)
1420 {
1421         u8 *buf, *identity;
1422         size_t len;
1423         struct eapol_state_machine *sm = sta->eapol_sm;
1424
1425         if (sm == NULL)
1426                 return;
1427
1428         if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_USER_NAME, &buf, &len,
1429                                     NULL) < 0)
1430                 return;
1431
1432         identity = (u8 *) dup_binstr(buf, len);
1433         if (identity == NULL)
1434                 return;
1435
1436         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1437                        HOSTAPD_LEVEL_DEBUG, "old identity '%s' updated with "
1438                        "User-Name from Access-Accept '%s'",
1439                        sm->identity ? (char *) sm->identity : "N/A",
1440                        (char *) identity);
1441
1442         os_free(sm->identity);
1443         sm->identity = identity;
1444         sm->identity_len = len;
1445 }
1446
1447
1448 /* Update CUI based on Chargeable-User-Identity attribute in Access-Accept */
1449 static void ieee802_1x_update_sta_cui(struct hostapd_data *hapd,
1450                                       struct sta_info *sta,
1451                                       struct radius_msg *msg)
1452 {
1453         struct eapol_state_machine *sm = sta->eapol_sm;
1454         struct wpabuf *cui;
1455         u8 *buf;
1456         size_t len;
1457
1458         if (sm == NULL)
1459                 return;
1460
1461         if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CHARGEABLE_USER_IDENTITY,
1462                                     &buf, &len, NULL) < 0)
1463                 return;
1464
1465         cui = wpabuf_alloc_copy(buf, len);
1466         if (cui == NULL)
1467                 return;
1468
1469         wpabuf_free(sm->radius_cui);
1470         sm->radius_cui = cui;
1471 }
1472
1473
1474 #ifdef CONFIG_HS20
1475
1476 static void ieee802_1x_hs20_sub_rem(struct sta_info *sta, u8 *pos, size_t len)
1477 {
1478         sta->remediation = 1;
1479         os_free(sta->remediation_url);
1480         if (len > 2) {
1481                 sta->remediation_url = os_malloc(len);
1482                 if (!sta->remediation_url)
1483                         return;
1484                 sta->remediation_method = pos[0];
1485                 os_memcpy(sta->remediation_url, pos + 1, len - 1);
1486                 sta->remediation_url[len - 1] = '\0';
1487                 wpa_printf(MSG_DEBUG, "HS 2.0: Subscription remediation needed "
1488                            "for " MACSTR " - server method %u URL %s",
1489                            MAC2STR(sta->addr), sta->remediation_method,
1490                            sta->remediation_url);
1491         } else {
1492                 sta->remediation_url = NULL;
1493                 wpa_printf(MSG_DEBUG, "HS 2.0: Subscription remediation needed "
1494                            "for " MACSTR, MAC2STR(sta->addr));
1495         }
1496         /* TODO: assign the STA into remediation VLAN or add filtering */
1497 }
1498
1499
1500 static void ieee802_1x_hs20_deauth_req(struct hostapd_data *hapd,
1501                                        struct sta_info *sta, u8 *pos,
1502                                        size_t len)
1503 {
1504         if (len < 3)
1505                 return; /* Malformed information */
1506         sta->hs20_deauth_requested = 1;
1507         wpa_printf(MSG_DEBUG, "HS 2.0: Deauthentication request - Code %u  "
1508                    "Re-auth Delay %u",
1509                    *pos, WPA_GET_LE16(pos + 1));
1510         wpabuf_free(sta->hs20_deauth_req);
1511         sta->hs20_deauth_req = wpabuf_alloc(len + 1);
1512         if (sta->hs20_deauth_req) {
1513                 wpabuf_put_data(sta->hs20_deauth_req, pos, 3);
1514                 wpabuf_put_u8(sta->hs20_deauth_req, len - 3);
1515                 wpabuf_put_data(sta->hs20_deauth_req, pos + 3, len - 3);
1516         }
1517         ap_sta_session_timeout(hapd, sta, hapd->conf->hs20_deauth_req_timeout);
1518 }
1519
1520
1521 static void ieee802_1x_hs20_session_info(struct hostapd_data *hapd,
1522                                          struct sta_info *sta, u8 *pos,
1523                                          size_t len, int session_timeout)
1524 {
1525         unsigned int swt;
1526         int warning_time, beacon_int;
1527
1528         if (len < 1)
1529                 return; /* Malformed information */
1530         os_free(sta->hs20_session_info_url);
1531         sta->hs20_session_info_url = os_malloc(len);
1532         if (sta->hs20_session_info_url == NULL)
1533                 return;
1534         swt = pos[0];
1535         os_memcpy(sta->hs20_session_info_url, pos + 1, len - 1);
1536         sta->hs20_session_info_url[len - 1] = '\0';
1537         wpa_printf(MSG_DEBUG, "HS 2.0: Session Information URL='%s' SWT=%u "
1538                    "(session_timeout=%d)",
1539                    sta->hs20_session_info_url, swt, session_timeout);
1540         if (session_timeout < 0) {
1541                 wpa_printf(MSG_DEBUG, "HS 2.0: No Session-Timeout set - ignore session info URL");
1542                 return;
1543         }
1544         if (swt == 255)
1545                 swt = 1; /* Use one minute as the AP selected value */
1546
1547         if ((unsigned int) session_timeout < swt * 60)
1548                 warning_time = 0;
1549         else
1550                 warning_time = session_timeout - swt * 60;
1551
1552         beacon_int = hapd->iconf->beacon_int;
1553         if (beacon_int < 1)
1554                 beacon_int = 100; /* best guess */
1555         sta->hs20_disassoc_timer = swt * 60 * 1000 / beacon_int * 125 / 128;
1556         if (sta->hs20_disassoc_timer > 65535)
1557                 sta->hs20_disassoc_timer = 65535;
1558
1559         ap_sta_session_warning_timeout(hapd, sta, warning_time);
1560 }
1561
1562 #endif /* CONFIG_HS20 */
1563
1564
1565 static void ieee802_1x_check_hs20(struct hostapd_data *hapd,
1566                                   struct sta_info *sta,
1567                                   struct radius_msg *msg,
1568                                   int session_timeout)
1569 {
1570 #ifdef CONFIG_HS20
1571         u8 *buf, *pos, *end, type, sublen;
1572         size_t len;
1573
1574         buf = NULL;
1575         sta->remediation = 0;
1576         sta->hs20_deauth_requested = 0;
1577
1578         for (;;) {
1579                 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_VENDOR_SPECIFIC,
1580                                             &buf, &len, buf) < 0)
1581                         break;
1582                 if (len < 6)
1583                         continue;
1584                 pos = buf;
1585                 end = buf + len;
1586                 if (WPA_GET_BE32(pos) != RADIUS_VENDOR_ID_WFA)
1587                         continue;
1588                 pos += 4;
1589
1590                 type = *pos++;
1591                 sublen = *pos++;
1592                 if (sublen < 2)
1593                         continue; /* invalid length */
1594                 sublen -= 2; /* skip header */
1595                 if (pos + sublen > end)
1596                         continue; /* invalid WFA VSA */
1597
1598                 switch (type) {
1599                 case RADIUS_VENDOR_ATTR_WFA_HS20_SUBSCR_REMEDIATION:
1600                         ieee802_1x_hs20_sub_rem(sta, pos, sublen);
1601                         break;
1602                 case RADIUS_VENDOR_ATTR_WFA_HS20_DEAUTH_REQ:
1603                         ieee802_1x_hs20_deauth_req(hapd, sta, pos, sublen);
1604                         break;
1605                 case RADIUS_VENDOR_ATTR_WFA_HS20_SESSION_INFO_URL:
1606                         ieee802_1x_hs20_session_info(hapd, sta, pos, sublen,
1607                                                      session_timeout);
1608                         break;
1609                 }
1610         }
1611 #endif /* CONFIG_HS20 */
1612 }
1613
1614
1615 struct sta_id_search {
1616         u8 identifier;
1617         struct eapol_state_machine *sm;
1618 };
1619
1620
1621 static int ieee802_1x_select_radius_identifier(struct hostapd_data *hapd,
1622                                                struct sta_info *sta,
1623                                                void *ctx)
1624 {
1625         struct sta_id_search *id_search = ctx;
1626         struct eapol_state_machine *sm = sta->eapol_sm;
1627
1628         if (sm && sm->radius_identifier >= 0 &&
1629             sm->radius_identifier == id_search->identifier) {
1630                 id_search->sm = sm;
1631                 return 1;
1632         }
1633         return 0;
1634 }
1635
1636
1637 static struct eapol_state_machine *
1638 ieee802_1x_search_radius_identifier(struct hostapd_data *hapd, u8 identifier)
1639 {
1640         struct sta_id_search id_search;
1641         id_search.identifier = identifier;
1642         id_search.sm = NULL;
1643         ap_for_each_sta(hapd, ieee802_1x_select_radius_identifier, &id_search);
1644         return id_search.sm;
1645 }
1646
1647
1648 /**
1649  * ieee802_1x_receive_auth - Process RADIUS frames from Authentication Server
1650  * @msg: RADIUS response message
1651  * @req: RADIUS request message
1652  * @shared_secret: RADIUS shared secret
1653  * @shared_secret_len: Length of shared_secret in octets
1654  * @data: Context data (struct hostapd_data *)
1655  * Returns: Processing status
1656  */
1657 static RadiusRxResult
1658 ieee802_1x_receive_auth(struct radius_msg *msg, struct radius_msg *req,
1659                         const u8 *shared_secret, size_t shared_secret_len,
1660                         void *data)
1661 {
1662         struct hostapd_data *hapd = data;
1663         struct sta_info *sta;
1664         u32 session_timeout = 0, termination_action, acct_interim_interval;
1665         int session_timeout_set;
1666         struct eapol_state_machine *sm;
1667         int override_eapReq = 0;
1668         struct radius_hdr *hdr = radius_msg_get_hdr(msg);
1669         struct vlan_description vlan_desc;
1670 #ifndef CONFIG_NO_VLAN
1671         int *untagged, *tagged, *notempty;
1672 #endif /* CONFIG_NO_VLAN */
1673
1674         os_memset(&vlan_desc, 0, sizeof(vlan_desc));
1675
1676         sm = ieee802_1x_search_radius_identifier(hapd, hdr->identifier);
1677         if (sm == NULL) {
1678                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Could not find matching "
1679                            "station for this RADIUS message");
1680                 return RADIUS_RX_UNKNOWN;
1681         }
1682         sta = sm->sta;
1683
1684         /* RFC 2869, Ch. 5.13: valid Message-Authenticator attribute MUST be
1685          * present when packet contains an EAP-Message attribute */
1686         if (hdr->code == RADIUS_CODE_ACCESS_REJECT &&
1687             radius_msg_get_attr(msg, RADIUS_ATTR_MESSAGE_AUTHENTICATOR, NULL,
1688                                 0) < 0 &&
1689             radius_msg_get_attr(msg, RADIUS_ATTR_EAP_MESSAGE, NULL, 0) < 0) {
1690                 wpa_printf(MSG_DEBUG, "Allowing RADIUS Access-Reject without "
1691                            "Message-Authenticator since it does not include "
1692                            "EAP-Message");
1693         } else if (radius_msg_verify(msg, shared_secret, shared_secret_len,
1694                                      req, 1)) {
1695                 wpa_printf(MSG_INFO, "Incoming RADIUS packet did not have correct Message-Authenticator - dropped");
1696                 return RADIUS_RX_INVALID_AUTHENTICATOR;
1697         }
1698
1699         if (hdr->code != RADIUS_CODE_ACCESS_ACCEPT &&
1700             hdr->code != RADIUS_CODE_ACCESS_REJECT &&
1701             hdr->code != RADIUS_CODE_ACCESS_CHALLENGE) {
1702                 wpa_printf(MSG_INFO, "Unknown RADIUS message code");
1703                 return RADIUS_RX_UNKNOWN;
1704         }
1705
1706         sm->radius_identifier = -1;
1707         wpa_printf(MSG_DEBUG, "RADIUS packet matching with station " MACSTR,
1708                    MAC2STR(sta->addr));
1709
1710         radius_msg_free(sm->last_recv_radius);
1711         sm->last_recv_radius = msg;
1712
1713         session_timeout_set =
1714                 !radius_msg_get_attr_int32(msg, RADIUS_ATTR_SESSION_TIMEOUT,
1715                                            &session_timeout);
1716         if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_TERMINATION_ACTION,
1717                                       &termination_action))
1718                 termination_action = RADIUS_TERMINATION_ACTION_DEFAULT;
1719
1720         if (hapd->conf->acct_interim_interval == 0 &&
1721             hdr->code == RADIUS_CODE_ACCESS_ACCEPT &&
1722             radius_msg_get_attr_int32(msg, RADIUS_ATTR_ACCT_INTERIM_INTERVAL,
1723                                       &acct_interim_interval) == 0) {
1724                 if (acct_interim_interval < 60) {
1725                         hostapd_logger(hapd, sta->addr,
1726                                        HOSTAPD_MODULE_IEEE8021X,
1727                                        HOSTAPD_LEVEL_INFO,
1728                                        "ignored too small "
1729                                        "Acct-Interim-Interval %d",
1730                                        acct_interim_interval);
1731                 } else
1732                         sta->acct_interim_interval = acct_interim_interval;
1733         }
1734
1735
1736         switch (hdr->code) {
1737         case RADIUS_CODE_ACCESS_ACCEPT:
1738 #ifndef CONFIG_NO_VLAN
1739                 if (hapd->conf->ssid.dynamic_vlan != DYNAMIC_VLAN_DISABLED) {
1740                         notempty = &vlan_desc.notempty;
1741                         untagged = &vlan_desc.untagged;
1742                         tagged = vlan_desc.tagged;
1743                         *notempty = !!radius_msg_get_vlanid(msg, untagged,
1744                                                             MAX_NUM_TAGGED_VLAN,
1745                                                             tagged);
1746                 }
1747
1748                 if (vlan_desc.notempty &&
1749                     !hostapd_vlan_valid(hapd->conf->vlan, &vlan_desc)) {
1750                         sta->eapol_sm->authFail = TRUE;
1751                         hostapd_logger(hapd, sta->addr,
1752                                        HOSTAPD_MODULE_RADIUS,
1753                                        HOSTAPD_LEVEL_INFO,
1754                                        "Invalid VLAN %d%s received from RADIUS server",
1755                                        vlan_desc.untagged,
1756                                        vlan_desc.tagged[0] ? "+" : "");
1757                         os_memset(&vlan_desc, 0, sizeof(vlan_desc));
1758                         ap_sta_set_vlan(hapd, sta, &vlan_desc);
1759                         break;
1760                 }
1761
1762                 if (hapd->conf->ssid.dynamic_vlan == DYNAMIC_VLAN_REQUIRED &&
1763                     !vlan_desc.notempty) {
1764                         sta->eapol_sm->authFail = TRUE;
1765                         hostapd_logger(hapd, sta->addr,
1766                                        HOSTAPD_MODULE_IEEE8021X,
1767                                        HOSTAPD_LEVEL_INFO, "authentication "
1768                                        "server did not include required VLAN "
1769                                        "ID in Access-Accept");
1770                         break;
1771                 }
1772 #endif /* CONFIG_NO_VLAN */
1773
1774                 if (ap_sta_set_vlan(hapd, sta, &vlan_desc) < 0)
1775                         break;
1776
1777 #ifndef CONFIG_NO_VLAN
1778                 if (sta->vlan_id > 0) {
1779                         hostapd_logger(hapd, sta->addr,
1780                                        HOSTAPD_MODULE_RADIUS,
1781                                        HOSTAPD_LEVEL_INFO,
1782                                        "VLAN ID %d", sta->vlan_id);
1783                 }
1784 #endif /* CONFIG_NO_VLAN */
1785
1786                 if ((sta->flags & WLAN_STA_ASSOC) &&
1787                     ap_sta_bind_vlan(hapd, sta) < 0)
1788                         break;
1789
1790                 sta->session_timeout_set = !!session_timeout_set;
1791                 sta->session_timeout = session_timeout;
1792
1793                 /* RFC 3580, Ch. 3.17 */
1794                 if (session_timeout_set && termination_action ==
1795                     RADIUS_TERMINATION_ACTION_RADIUS_REQUEST) {
1796                         sm->reAuthPeriod = session_timeout;
1797                 } else if (session_timeout_set)
1798                         ap_sta_session_timeout(hapd, sta, session_timeout);
1799
1800                 sm->eap_if->aaaSuccess = TRUE;
1801                 override_eapReq = 1;
1802                 ieee802_1x_get_keys(hapd, sta, msg, req, shared_secret,
1803                                     shared_secret_len);
1804                 ieee802_1x_store_radius_class(hapd, sta, msg);
1805                 ieee802_1x_update_sta_identity(hapd, sta, msg);
1806                 ieee802_1x_update_sta_cui(hapd, sta, msg);
1807                 ieee802_1x_check_hs20(hapd, sta, msg,
1808                                       session_timeout_set ?
1809                                       (int) session_timeout : -1);
1810                 break;
1811         case RADIUS_CODE_ACCESS_REJECT:
1812                 sm->eap_if->aaaFail = TRUE;
1813                 override_eapReq = 1;
1814                 break;
1815         case RADIUS_CODE_ACCESS_CHALLENGE:
1816                 sm->eap_if->aaaEapReq = TRUE;
1817                 if (session_timeout_set) {
1818                         /* RFC 2869, Ch. 2.3.2; RFC 3580, Ch. 3.17 */
1819                         sm->eap_if->aaaMethodTimeout = session_timeout;
1820                         hostapd_logger(hapd, sm->addr,
1821                                        HOSTAPD_MODULE_IEEE8021X,
1822                                        HOSTAPD_LEVEL_DEBUG,
1823                                        "using EAP timeout of %d seconds (from "
1824                                        "RADIUS)",
1825                                        sm->eap_if->aaaMethodTimeout);
1826                 } else {
1827                         /*
1828                          * Use dynamic retransmission behavior per EAP
1829                          * specification.
1830                          */
1831                         sm->eap_if->aaaMethodTimeout = 0;
1832                 }
1833                 break;
1834         }
1835
1836         ieee802_1x_decapsulate_radius(hapd, sta);
1837         if (override_eapReq)
1838                 sm->eap_if->aaaEapReq = FALSE;
1839
1840         eapol_auth_step(sm);
1841
1842         return RADIUS_RX_QUEUED;
1843 }
1844 #endif /* CONFIG_NO_RADIUS */
1845
1846
1847 void ieee802_1x_abort_auth(struct hostapd_data *hapd, struct sta_info *sta)
1848 {
1849         struct eapol_state_machine *sm = sta->eapol_sm;
1850         if (sm == NULL)
1851                 return;
1852
1853         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1854                        HOSTAPD_LEVEL_DEBUG, "aborting authentication");
1855
1856 #ifndef CONFIG_NO_RADIUS
1857         radius_msg_free(sm->last_recv_radius);
1858         sm->last_recv_radius = NULL;
1859 #endif /* CONFIG_NO_RADIUS */
1860
1861         if (sm->eap_if->eapTimeout) {
1862                 /*
1863                  * Disconnect the STA since it did not reply to the last EAP
1864                  * request and we cannot continue EAP processing (EAP-Failure
1865                  * could only be sent if the EAP peer actually replied).
1866                  */
1867                 wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "EAP Timeout, STA " MACSTR,
1868                         MAC2STR(sta->addr));
1869
1870                 sm->eap_if->portEnabled = FALSE;
1871                 ap_sta_disconnect(hapd, sta, sta->addr,
1872                                   WLAN_REASON_PREV_AUTH_NOT_VALID);
1873         }
1874 }
1875
1876
1877 static int ieee802_1x_rekey_broadcast(struct hostapd_data *hapd)
1878 {
1879         struct eapol_authenticator *eapol = hapd->eapol_auth;
1880
1881         if (hapd->conf->default_wep_key_len < 1)
1882                 return 0;
1883
1884         os_free(eapol->default_wep_key);
1885         eapol->default_wep_key = os_malloc(hapd->conf->default_wep_key_len);
1886         if (eapol->default_wep_key == NULL ||
1887             random_get_bytes(eapol->default_wep_key,
1888                              hapd->conf->default_wep_key_len)) {
1889                 wpa_printf(MSG_INFO, "Could not generate random WEP key");
1890                 os_free(eapol->default_wep_key);
1891                 eapol->default_wep_key = NULL;
1892                 return -1;
1893         }
1894
1895         wpa_hexdump_key(MSG_DEBUG, "IEEE 802.1X: New default WEP key",
1896                         eapol->default_wep_key,
1897                         hapd->conf->default_wep_key_len);
1898
1899         return 0;
1900 }
1901
1902
1903 static int ieee802_1x_sta_key_available(struct hostapd_data *hapd,
1904                                         struct sta_info *sta, void *ctx)
1905 {
1906         if (sta->eapol_sm) {
1907                 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
1908                 eapol_auth_step(sta->eapol_sm);
1909         }
1910         return 0;
1911 }
1912
1913
1914 static void ieee802_1x_rekey(void *eloop_ctx, void *timeout_ctx)
1915 {
1916         struct hostapd_data *hapd = eloop_ctx;
1917         struct eapol_authenticator *eapol = hapd->eapol_auth;
1918
1919         if (eapol->default_wep_key_idx >= 3)
1920                 eapol->default_wep_key_idx =
1921                         hapd->conf->individual_wep_key_len > 0 ? 1 : 0;
1922         else
1923                 eapol->default_wep_key_idx++;
1924
1925         wpa_printf(MSG_DEBUG, "IEEE 802.1X: New default WEP key index %d",
1926                    eapol->default_wep_key_idx);
1927
1928         if (ieee802_1x_rekey_broadcast(hapd)) {
1929                 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1930                                HOSTAPD_LEVEL_WARNING, "failed to generate a "
1931                                "new broadcast key");
1932                 os_free(eapol->default_wep_key);
1933                 eapol->default_wep_key = NULL;
1934                 return;
1935         }
1936
1937         /* TODO: Could setup key for RX here, but change default TX keyid only
1938          * after new broadcast key has been sent to all stations. */
1939         if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
1940                                 broadcast_ether_addr,
1941                                 eapol->default_wep_key_idx, 1, NULL, 0,
1942                                 eapol->default_wep_key,
1943                                 hapd->conf->default_wep_key_len)) {
1944                 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1945                                HOSTAPD_LEVEL_WARNING, "failed to configure a "
1946                                "new broadcast key");
1947                 os_free(eapol->default_wep_key);
1948                 eapol->default_wep_key = NULL;
1949                 return;
1950         }
1951
1952         ap_for_each_sta(hapd, ieee802_1x_sta_key_available, NULL);
1953
1954         if (hapd->conf->wep_rekeying_period > 0) {
1955                 eloop_register_timeout(hapd->conf->wep_rekeying_period, 0,
1956                                        ieee802_1x_rekey, hapd, NULL);
1957         }
1958 }
1959
1960
1961 static void ieee802_1x_eapol_send(void *ctx, void *sta_ctx, u8 type,
1962                                   const u8 *data, size_t datalen)
1963 {
1964 #ifdef CONFIG_WPS
1965         struct sta_info *sta = sta_ctx;
1966
1967         if ((sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) ==
1968             WLAN_STA_MAYBE_WPS) {
1969                 const u8 *identity;
1970                 size_t identity_len;
1971                 struct eapol_state_machine *sm = sta->eapol_sm;
1972
1973                 identity = eap_get_identity(sm->eap, &identity_len);
1974                 if (identity &&
1975                     ((identity_len == WSC_ID_ENROLLEE_LEN &&
1976                       os_memcmp(identity, WSC_ID_ENROLLEE,
1977                                 WSC_ID_ENROLLEE_LEN) == 0) ||
1978                      (identity_len == WSC_ID_REGISTRAR_LEN &&
1979                       os_memcmp(identity, WSC_ID_REGISTRAR,
1980                                 WSC_ID_REGISTRAR_LEN) == 0))) {
1981                         wpa_printf(MSG_DEBUG, "WPS: WLAN_STA_MAYBE_WPS -> "
1982                                    "WLAN_STA_WPS");
1983                         sta->flags |= WLAN_STA_WPS;
1984                 }
1985         }
1986 #endif /* CONFIG_WPS */
1987
1988         ieee802_1x_send(ctx, sta_ctx, type, data, datalen);
1989 }
1990
1991
1992 static void ieee802_1x_aaa_send(void *ctx, void *sta_ctx,
1993                                 const u8 *data, size_t datalen)
1994 {
1995 #ifndef CONFIG_NO_RADIUS
1996         struct hostapd_data *hapd = ctx;
1997         struct sta_info *sta = sta_ctx;
1998
1999         ieee802_1x_encapsulate_radius(hapd, sta, data, datalen);
2000 #endif /* CONFIG_NO_RADIUS */
2001 }
2002
2003
2004 static void _ieee802_1x_finished(void *ctx, void *sta_ctx, int success,
2005                                  int preauth, int remediation)
2006 {
2007         struct hostapd_data *hapd = ctx;
2008         struct sta_info *sta = sta_ctx;
2009         if (preauth)
2010                 rsn_preauth_finished(hapd, sta, success);
2011         else
2012                 ieee802_1x_finished(hapd, sta, success, remediation);
2013 }
2014
2015
2016 static int ieee802_1x_get_eap_user(void *ctx, const u8 *identity,
2017                                    size_t identity_len, int phase2,
2018                                    struct eap_user *user)
2019 {
2020         struct hostapd_data *hapd = ctx;
2021         const struct hostapd_eap_user *eap_user;
2022         int i;
2023         int rv = -1;
2024
2025         eap_user = hostapd_get_eap_user(hapd, identity, identity_len, phase2);
2026         if (eap_user == NULL)
2027                 goto out;
2028
2029         os_memset(user, 0, sizeof(*user));
2030         user->phase2 = phase2;
2031         for (i = 0; i < EAP_MAX_METHODS; i++) {
2032                 user->methods[i].vendor = eap_user->methods[i].vendor;
2033                 user->methods[i].method = eap_user->methods[i].method;
2034         }
2035
2036         if (eap_user->password) {
2037                 user->password = os_malloc(eap_user->password_len);
2038                 if (user->password == NULL)
2039                         goto out;
2040                 os_memcpy(user->password, eap_user->password,
2041                           eap_user->password_len);
2042                 user->password_len = eap_user->password_len;
2043                 user->password_hash = eap_user->password_hash;
2044         }
2045         user->force_version = eap_user->force_version;
2046         user->macacl = eap_user->macacl;
2047         user->ttls_auth = eap_user->ttls_auth;
2048         user->remediation = eap_user->remediation;
2049         rv = 0;
2050
2051 out:
2052         if (rv)
2053                 wpa_printf(MSG_DEBUG, "%s: Failed to find user", __func__);
2054
2055         return rv;
2056 }
2057
2058
2059 static int ieee802_1x_sta_entry_alive(void *ctx, const u8 *addr)
2060 {
2061         struct hostapd_data *hapd = ctx;
2062         struct sta_info *sta;
2063         sta = ap_get_sta(hapd, addr);
2064         if (sta == NULL || sta->eapol_sm == NULL)
2065                 return 0;
2066         return 1;
2067 }
2068
2069
2070 static void ieee802_1x_logger(void *ctx, const u8 *addr,
2071                               eapol_logger_level level, const char *txt)
2072 {
2073 #ifndef CONFIG_NO_HOSTAPD_LOGGER
2074         struct hostapd_data *hapd = ctx;
2075         int hlevel;
2076
2077         switch (level) {
2078         case EAPOL_LOGGER_WARNING:
2079                 hlevel = HOSTAPD_LEVEL_WARNING;
2080                 break;
2081         case EAPOL_LOGGER_INFO:
2082                 hlevel = HOSTAPD_LEVEL_INFO;
2083                 break;
2084         case EAPOL_LOGGER_DEBUG:
2085         default:
2086                 hlevel = HOSTAPD_LEVEL_DEBUG;
2087                 break;
2088         }
2089
2090         hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE8021X, hlevel, "%s",
2091                        txt);
2092 #endif /* CONFIG_NO_HOSTAPD_LOGGER */
2093 }
2094
2095
2096 static void ieee802_1x_set_port_authorized(void *ctx, void *sta_ctx,
2097                                            int authorized)
2098 {
2099         struct hostapd_data *hapd = ctx;
2100         struct sta_info *sta = sta_ctx;
2101         ieee802_1x_set_sta_authorized(hapd, sta, authorized);
2102 }
2103
2104
2105 static void _ieee802_1x_abort_auth(void *ctx, void *sta_ctx)
2106 {
2107         struct hostapd_data *hapd = ctx;
2108         struct sta_info *sta = sta_ctx;
2109         ieee802_1x_abort_auth(hapd, sta);
2110 }
2111
2112
2113 static void _ieee802_1x_tx_key(void *ctx, void *sta_ctx)
2114 {
2115 #ifndef CONFIG_FIPS
2116 #ifndef CONFIG_NO_RC4
2117         struct hostapd_data *hapd = ctx;
2118         struct sta_info *sta = sta_ctx;
2119         ieee802_1x_tx_key(hapd, sta);
2120 #endif /* CONFIG_NO_RC4 */
2121 #endif /* CONFIG_FIPS */
2122 }
2123
2124
2125 static void ieee802_1x_eapol_event(void *ctx, void *sta_ctx,
2126                                    enum eapol_event type)
2127 {
2128         /* struct hostapd_data *hapd = ctx; */
2129         struct sta_info *sta = sta_ctx;
2130         switch (type) {
2131         case EAPOL_AUTH_SM_CHANGE:
2132                 wpa_auth_sm_notify(sta->wpa_sm);
2133                 break;
2134         case EAPOL_AUTH_REAUTHENTICATE:
2135                 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
2136                 break;
2137         }
2138 }
2139
2140
2141 #ifdef CONFIG_ERP
2142
2143 static struct eap_server_erp_key *
2144 ieee802_1x_erp_get_key(void *ctx, const char *keyname)
2145 {
2146         struct hostapd_data *hapd = ctx;
2147         struct eap_server_erp_key *erp;
2148
2149         dl_list_for_each(erp, &hapd->erp_keys, struct eap_server_erp_key,
2150                          list) {
2151                 if (os_strcmp(erp->keyname_nai, keyname) == 0)
2152                         return erp;
2153         }
2154
2155         return NULL;
2156 }
2157
2158
2159 static int ieee802_1x_erp_add_key(void *ctx, struct eap_server_erp_key *erp)
2160 {
2161         struct hostapd_data *hapd = ctx;
2162
2163         dl_list_add(&hapd->erp_keys, &erp->list);
2164         return 0;
2165 }
2166
2167 #endif /* CONFIG_ERP */
2168
2169
2170 int ieee802_1x_init(struct hostapd_data *hapd)
2171 {
2172         int i;
2173         struct eapol_auth_config conf;
2174         struct eapol_auth_cb cb;
2175
2176         dl_list_init(&hapd->erp_keys);
2177
2178         os_memset(&conf, 0, sizeof(conf));
2179         conf.ctx = hapd;
2180         conf.eap_reauth_period = hapd->conf->eap_reauth_period;
2181         conf.wpa = hapd->conf->wpa;
2182         conf.individual_wep_key_len = hapd->conf->individual_wep_key_len;
2183         conf.eap_server = hapd->conf->eap_server;
2184         conf.ssl_ctx = hapd->ssl_ctx;
2185         conf.msg_ctx = hapd->msg_ctx;
2186         conf.eap_sim_db_priv = hapd->eap_sim_db_priv;
2187         conf.eap_req_id_text = hapd->conf->eap_req_id_text;
2188         conf.eap_req_id_text_len = hapd->conf->eap_req_id_text_len;
2189         conf.erp_send_reauth_start = hapd->conf->erp_send_reauth_start;
2190         conf.erp_domain = hapd->conf->erp_domain;
2191         conf.erp = hapd->conf->eap_server_erp;
2192         conf.tls_session_lifetime = hapd->conf->tls_session_lifetime;
2193         conf.pac_opaque_encr_key = hapd->conf->pac_opaque_encr_key;
2194         conf.eap_fast_a_id = hapd->conf->eap_fast_a_id;
2195         conf.eap_fast_a_id_len = hapd->conf->eap_fast_a_id_len;
2196         conf.eap_fast_a_id_info = hapd->conf->eap_fast_a_id_info;
2197         conf.eap_fast_prov = hapd->conf->eap_fast_prov;
2198         conf.pac_key_lifetime = hapd->conf->pac_key_lifetime;
2199         conf.pac_key_refresh_time = hapd->conf->pac_key_refresh_time;
2200         conf.eap_sim_aka_result_ind = hapd->conf->eap_sim_aka_result_ind;
2201         conf.tnc = hapd->conf->tnc;
2202         conf.wps = hapd->wps;
2203         conf.fragment_size = hapd->conf->fragment_size;
2204         conf.pwd_group = hapd->conf->pwd_group;
2205         conf.pbc_in_m1 = hapd->conf->pbc_in_m1;
2206         if (hapd->conf->server_id) {
2207                 conf.server_id = (const u8 *) hapd->conf->server_id;
2208                 conf.server_id_len = os_strlen(hapd->conf->server_id);
2209         } else {
2210                 conf.server_id = (const u8 *) "hostapd";
2211                 conf.server_id_len = 7;
2212         }
2213
2214         os_memset(&cb, 0, sizeof(cb));
2215         cb.eapol_send = ieee802_1x_eapol_send;
2216         cb.aaa_send = ieee802_1x_aaa_send;
2217         cb.finished = _ieee802_1x_finished;
2218         cb.get_eap_user = ieee802_1x_get_eap_user;
2219         cb.sta_entry_alive = ieee802_1x_sta_entry_alive;
2220         cb.logger = ieee802_1x_logger;
2221         cb.set_port_authorized = ieee802_1x_set_port_authorized;
2222         cb.abort_auth = _ieee802_1x_abort_auth;
2223         cb.tx_key = _ieee802_1x_tx_key;
2224         cb.eapol_event = ieee802_1x_eapol_event;
2225 #ifdef CONFIG_ERP
2226         cb.erp_get_key = ieee802_1x_erp_get_key;
2227         cb.erp_add_key = ieee802_1x_erp_add_key;
2228 #endif /* CONFIG_ERP */
2229
2230         hapd->eapol_auth = eapol_auth_init(&conf, &cb);
2231         if (hapd->eapol_auth == NULL)
2232                 return -1;
2233
2234         if ((hapd->conf->ieee802_1x || hapd->conf->wpa) &&
2235             hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 1))
2236                 return -1;
2237
2238 #ifndef CONFIG_NO_RADIUS
2239         if (radius_client_register(hapd->radius, RADIUS_AUTH,
2240                                    ieee802_1x_receive_auth, hapd))
2241                 return -1;
2242 #endif /* CONFIG_NO_RADIUS */
2243
2244         if (hapd->conf->default_wep_key_len) {
2245                 for (i = 0; i < 4; i++)
2246                         hostapd_drv_set_key(hapd->conf->iface, hapd,
2247                                             WPA_ALG_NONE, NULL, i, 0, NULL, 0,
2248                                             NULL, 0);
2249
2250                 ieee802_1x_rekey(hapd, NULL);
2251
2252                 if (hapd->eapol_auth->default_wep_key == NULL)
2253                         return -1;
2254         }
2255
2256         return 0;
2257 }
2258
2259
2260 void ieee802_1x_erp_flush(struct hostapd_data *hapd)
2261 {
2262         struct eap_server_erp_key *erp;
2263
2264         while ((erp = dl_list_first(&hapd->erp_keys, struct eap_server_erp_key,
2265                                     list)) != NULL) {
2266                 dl_list_del(&erp->list);
2267                 bin_clear_free(erp, sizeof(*erp));
2268         }
2269 }
2270
2271
2272 void ieee802_1x_deinit(struct hostapd_data *hapd)
2273 {
2274         eloop_cancel_timeout(ieee802_1x_rekey, hapd, NULL);
2275
2276         if (hapd->driver && hapd->drv_priv &&
2277             (hapd->conf->ieee802_1x || hapd->conf->wpa))
2278                 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0);
2279
2280         eapol_auth_deinit(hapd->eapol_auth);
2281         hapd->eapol_auth = NULL;
2282
2283         ieee802_1x_erp_flush(hapd);
2284 }
2285
2286
2287 int ieee802_1x_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
2288                          const u8 *buf, size_t len, int ack)
2289 {
2290         struct ieee80211_hdr *hdr;
2291         u8 *pos;
2292         const unsigned char rfc1042_hdr[ETH_ALEN] =
2293                 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
2294
2295         if (sta == NULL)
2296                 return -1;
2297         if (len < sizeof(*hdr) + sizeof(rfc1042_hdr) + 2)
2298                 return 0;
2299
2300         hdr = (struct ieee80211_hdr *) buf;
2301         pos = (u8 *) (hdr + 1);
2302         if (os_memcmp(pos, rfc1042_hdr, sizeof(rfc1042_hdr)) != 0)
2303                 return 0;
2304         pos += sizeof(rfc1042_hdr);
2305         if (WPA_GET_BE16(pos) != ETH_P_PAE)
2306                 return 0;
2307         pos += 2;
2308
2309         return ieee802_1x_eapol_tx_status(hapd, sta, pos, buf + len - pos,
2310                                           ack);
2311 }
2312
2313
2314 int ieee802_1x_eapol_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
2315                                const u8 *buf, int len, int ack)
2316 {
2317         const struct ieee802_1x_hdr *xhdr =
2318                 (const struct ieee802_1x_hdr *) buf;
2319         const u8 *pos = buf + sizeof(*xhdr);
2320         struct ieee802_1x_eapol_key *key;
2321
2322         if (len < (int) sizeof(*xhdr))
2323                 return 0;
2324         wpa_printf(MSG_DEBUG, "IEEE 802.1X: " MACSTR " TX status - version=%d "
2325                    "type=%d length=%d - ack=%d",
2326                    MAC2STR(sta->addr), xhdr->version, xhdr->type,
2327                    be_to_host16(xhdr->length), ack);
2328
2329         if (xhdr->type != IEEE802_1X_TYPE_EAPOL_KEY)
2330                 return 0;
2331
2332         if (pos + sizeof(struct wpa_eapol_key) <= buf + len) {
2333                 const struct wpa_eapol_key *wpa;
2334                 wpa = (const struct wpa_eapol_key *) pos;
2335                 if (wpa->type == EAPOL_KEY_TYPE_RSN ||
2336                     wpa->type == EAPOL_KEY_TYPE_WPA)
2337                         wpa_auth_eapol_key_tx_status(hapd->wpa_auth,
2338                                                      sta->wpa_sm, ack);
2339         }
2340
2341         /* EAPOL EAP-Packet packets are eventually re-sent by either Supplicant
2342          * or Authenticator state machines, but EAPOL-Key packets are not
2343          * retransmitted in case of failure. Try to re-send failed EAPOL-Key
2344          * packets couple of times because otherwise STA keys become
2345          * unsynchronized with AP. */
2346         if (!ack && pos + sizeof(*key) <= buf + len) {
2347                 key = (struct ieee802_1x_eapol_key *) pos;
2348                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
2349                                HOSTAPD_LEVEL_DEBUG, "did not Ack EAPOL-Key "
2350                                "frame (%scast index=%d)",
2351                                key->key_index & BIT(7) ? "uni" : "broad",
2352                                key->key_index & ~BIT(7));
2353                 /* TODO: re-send EAPOL-Key couple of times (with short delay
2354                  * between them?). If all attempt fail, report error and
2355                  * deauthenticate STA so that it will get new keys when
2356                  * authenticating again (e.g., after returning in range).
2357                  * Separate limit/transmit state needed both for unicast and
2358                  * broadcast keys(?) */
2359         }
2360         /* TODO: could move unicast key configuration from ieee802_1x_tx_key()
2361          * to here and change the key only if the EAPOL-Key packet was Acked.
2362          */
2363
2364         return 1;
2365 }
2366
2367
2368 u8 * ieee802_1x_get_identity(struct eapol_state_machine *sm, size_t *len)
2369 {
2370         if (sm == NULL || sm->identity == NULL)
2371                 return NULL;
2372
2373         *len = sm->identity_len;
2374         return sm->identity;
2375 }
2376
2377
2378 u8 * ieee802_1x_get_radius_class(struct eapol_state_machine *sm, size_t *len,
2379                                  int idx)
2380 {
2381         if (sm == NULL || sm->radius_class.attr == NULL ||
2382             idx >= (int) sm->radius_class.count)
2383                 return NULL;
2384
2385         *len = sm->radius_class.attr[idx].len;
2386         return sm->radius_class.attr[idx].data;
2387 }
2388
2389
2390 struct wpabuf * ieee802_1x_get_radius_cui(struct eapol_state_machine *sm)
2391 {
2392         if (sm == NULL)
2393                 return NULL;
2394         return sm->radius_cui;
2395 }
2396
2397
2398 const u8 * ieee802_1x_get_key(struct eapol_state_machine *sm, size_t *len)
2399 {
2400         *len = 0;
2401         if (sm == NULL)
2402                 return NULL;
2403
2404         *len = sm->eap_if->eapKeyDataLen;
2405         return sm->eap_if->eapKeyData;
2406 }
2407
2408
2409 void ieee802_1x_notify_port_enabled(struct eapol_state_machine *sm,
2410                                     int enabled)
2411 {
2412         if (sm == NULL)
2413                 return;
2414         sm->eap_if->portEnabled = enabled ? TRUE : FALSE;
2415         eapol_auth_step(sm);
2416 }
2417
2418
2419 void ieee802_1x_notify_port_valid(struct eapol_state_machine *sm,
2420                                   int valid)
2421 {
2422         if (sm == NULL)
2423                 return;
2424         sm->portValid = valid ? TRUE : FALSE;
2425         eapol_auth_step(sm);
2426 }
2427
2428
2429 void ieee802_1x_notify_pre_auth(struct eapol_state_machine *sm, int pre_auth)
2430 {
2431         if (sm == NULL)
2432                 return;
2433         if (pre_auth)
2434                 sm->flags |= EAPOL_SM_PREAUTH;
2435         else
2436                 sm->flags &= ~EAPOL_SM_PREAUTH;
2437 }
2438
2439
2440 static const char * bool_txt(Boolean val)
2441 {
2442         return val ? "TRUE" : "FALSE";
2443 }
2444
2445
2446 int ieee802_1x_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
2447 {
2448         /* TODO */
2449         return 0;
2450 }
2451
2452
2453 int ieee802_1x_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
2454                            char *buf, size_t buflen)
2455 {
2456         int len = 0, ret;
2457         struct eapol_state_machine *sm = sta->eapol_sm;
2458         struct os_reltime diff;
2459         const char *name1;
2460         const char *name2;
2461
2462         if (sm == NULL)
2463                 return 0;
2464
2465         ret = os_snprintf(buf + len, buflen - len,
2466                           "dot1xPaePortNumber=%d\n"
2467                           "dot1xPaePortProtocolVersion=%d\n"
2468                           "dot1xPaePortCapabilities=1\n"
2469                           "dot1xPaePortInitialize=%d\n"
2470                           "dot1xPaePortReauthenticate=FALSE\n",
2471                           sta->aid,
2472                           EAPOL_VERSION,
2473                           sm->initialize);
2474         if (os_snprintf_error(buflen - len, ret))
2475                 return len;
2476         len += ret;
2477
2478         /* dot1xAuthConfigTable */
2479         ret = os_snprintf(buf + len, buflen - len,
2480                           "dot1xAuthPaeState=%d\n"
2481                           "dot1xAuthBackendAuthState=%d\n"
2482                           "dot1xAuthAdminControlledDirections=%d\n"
2483                           "dot1xAuthOperControlledDirections=%d\n"
2484                           "dot1xAuthAuthControlledPortStatus=%d\n"
2485                           "dot1xAuthAuthControlledPortControl=%d\n"
2486                           "dot1xAuthQuietPeriod=%u\n"
2487                           "dot1xAuthServerTimeout=%u\n"
2488                           "dot1xAuthReAuthPeriod=%u\n"
2489                           "dot1xAuthReAuthEnabled=%s\n"
2490                           "dot1xAuthKeyTxEnabled=%s\n",
2491                           sm->auth_pae_state + 1,
2492                           sm->be_auth_state + 1,
2493                           sm->adminControlledDirections,
2494                           sm->operControlledDirections,
2495                           sm->authPortStatus,
2496                           sm->portControl,
2497                           sm->quietPeriod,
2498                           sm->serverTimeout,
2499                           sm->reAuthPeriod,
2500                           bool_txt(sm->reAuthEnabled),
2501                           bool_txt(sm->keyTxEnabled));
2502         if (os_snprintf_error(buflen - len, ret))
2503                 return len;
2504         len += ret;
2505
2506         /* dot1xAuthStatsTable */
2507         ret = os_snprintf(buf + len, buflen - len,
2508                           "dot1xAuthEapolFramesRx=%u\n"
2509                           "dot1xAuthEapolFramesTx=%u\n"
2510                           "dot1xAuthEapolStartFramesRx=%u\n"
2511                           "dot1xAuthEapolLogoffFramesRx=%u\n"
2512                           "dot1xAuthEapolRespIdFramesRx=%u\n"
2513                           "dot1xAuthEapolRespFramesRx=%u\n"
2514                           "dot1xAuthEapolReqIdFramesTx=%u\n"
2515                           "dot1xAuthEapolReqFramesTx=%u\n"
2516                           "dot1xAuthInvalidEapolFramesRx=%u\n"
2517                           "dot1xAuthEapLengthErrorFramesRx=%u\n"
2518                           "dot1xAuthLastEapolFrameVersion=%u\n"
2519                           "dot1xAuthLastEapolFrameSource=" MACSTR "\n",
2520                           sm->dot1xAuthEapolFramesRx,
2521                           sm->dot1xAuthEapolFramesTx,
2522                           sm->dot1xAuthEapolStartFramesRx,
2523                           sm->dot1xAuthEapolLogoffFramesRx,
2524                           sm->dot1xAuthEapolRespIdFramesRx,
2525                           sm->dot1xAuthEapolRespFramesRx,
2526                           sm->dot1xAuthEapolReqIdFramesTx,
2527                           sm->dot1xAuthEapolReqFramesTx,
2528                           sm->dot1xAuthInvalidEapolFramesRx,
2529                           sm->dot1xAuthEapLengthErrorFramesRx,
2530                           sm->dot1xAuthLastEapolFrameVersion,
2531                           MAC2STR(sm->addr));
2532         if (os_snprintf_error(buflen - len, ret))
2533                 return len;
2534         len += ret;
2535
2536         /* dot1xAuthDiagTable */
2537         ret = os_snprintf(buf + len, buflen - len,
2538                           "dot1xAuthEntersConnecting=%u\n"
2539                           "dot1xAuthEapLogoffsWhileConnecting=%u\n"
2540                           "dot1xAuthEntersAuthenticating=%u\n"
2541                           "dot1xAuthAuthSuccessesWhileAuthenticating=%u\n"
2542                           "dot1xAuthAuthTimeoutsWhileAuthenticating=%u\n"
2543                           "dot1xAuthAuthFailWhileAuthenticating=%u\n"
2544                           "dot1xAuthAuthEapStartsWhileAuthenticating=%u\n"
2545                           "dot1xAuthAuthEapLogoffWhileAuthenticating=%u\n"
2546                           "dot1xAuthAuthReauthsWhileAuthenticated=%u\n"
2547                           "dot1xAuthAuthEapStartsWhileAuthenticated=%u\n"
2548                           "dot1xAuthAuthEapLogoffWhileAuthenticated=%u\n"
2549                           "dot1xAuthBackendResponses=%u\n"
2550                           "dot1xAuthBackendAccessChallenges=%u\n"
2551                           "dot1xAuthBackendOtherRequestsToSupplicant=%u\n"
2552                           "dot1xAuthBackendAuthSuccesses=%u\n"
2553                           "dot1xAuthBackendAuthFails=%u\n",
2554                           sm->authEntersConnecting,
2555                           sm->authEapLogoffsWhileConnecting,
2556                           sm->authEntersAuthenticating,
2557                           sm->authAuthSuccessesWhileAuthenticating,
2558                           sm->authAuthTimeoutsWhileAuthenticating,
2559                           sm->authAuthFailWhileAuthenticating,
2560                           sm->authAuthEapStartsWhileAuthenticating,
2561                           sm->authAuthEapLogoffWhileAuthenticating,
2562                           sm->authAuthReauthsWhileAuthenticated,
2563                           sm->authAuthEapStartsWhileAuthenticated,
2564                           sm->authAuthEapLogoffWhileAuthenticated,
2565                           sm->backendResponses,
2566                           sm->backendAccessChallenges,
2567                           sm->backendOtherRequestsToSupplicant,
2568                           sm->backendAuthSuccesses,
2569                           sm->backendAuthFails);
2570         if (os_snprintf_error(buflen - len, ret))
2571                 return len;
2572         len += ret;
2573
2574         /* dot1xAuthSessionStatsTable */
2575         os_reltime_age(&sta->acct_session_start, &diff);
2576         ret = os_snprintf(buf + len, buflen - len,
2577                           /* TODO: dot1xAuthSessionOctetsRx */
2578                           /* TODO: dot1xAuthSessionOctetsTx */
2579                           /* TODO: dot1xAuthSessionFramesRx */
2580                           /* TODO: dot1xAuthSessionFramesTx */
2581                           "dot1xAuthSessionId=%016llX\n"
2582                           "dot1xAuthSessionAuthenticMethod=%d\n"
2583                           "dot1xAuthSessionTime=%u\n"
2584                           "dot1xAuthSessionTerminateCause=999\n"
2585                           "dot1xAuthSessionUserName=%s\n",
2586                           (unsigned long long) sta->acct_session_id,
2587                           (wpa_key_mgmt_wpa_ieee8021x(
2588                                    wpa_auth_sta_key_mgmt(sta->wpa_sm))) ?
2589                           1 : 2,
2590                           (unsigned int) diff.sec,
2591                           sm->identity);
2592         if (os_snprintf_error(buflen - len, ret))
2593                 return len;
2594         len += ret;
2595
2596         if (sm->acct_multi_session_id) {
2597                 ret = os_snprintf(buf + len, buflen - len,
2598                                   "authMultiSessionId=%016llX\n",
2599                                   (unsigned long long)
2600                                   sm->acct_multi_session_id);
2601                 if (os_snprintf_error(buflen - len, ret))
2602                         return len;
2603                 len += ret;
2604         }
2605
2606         name1 = eap_server_get_name(0, sm->eap_type_authsrv);
2607         name2 = eap_server_get_name(0, sm->eap_type_supp);
2608         ret = os_snprintf(buf + len, buflen - len,
2609                           "last_eap_type_as=%d (%s)\n"
2610                           "last_eap_type_sta=%d (%s)\n",
2611                           sm->eap_type_authsrv, name1,
2612                           sm->eap_type_supp, name2);
2613         if (os_snprintf_error(buflen - len, ret))
2614                 return len;
2615         len += ret;
2616
2617         return len;
2618 }
2619
2620
2621 #ifdef CONFIG_HS20
2622 static void ieee802_1x_wnm_notif_send(void *eloop_ctx, void *timeout_ctx)
2623 {
2624         struct hostapd_data *hapd = eloop_ctx;
2625         struct sta_info *sta = timeout_ctx;
2626
2627         if (sta->remediation) {
2628                 wpa_printf(MSG_DEBUG, "HS 2.0: Send WNM-Notification to "
2629                            MACSTR " to indicate Subscription Remediation",
2630                            MAC2STR(sta->addr));
2631                 hs20_send_wnm_notification(hapd, sta->addr,
2632                                            sta->remediation_method,
2633                                            sta->remediation_url);
2634                 os_free(sta->remediation_url);
2635                 sta->remediation_url = NULL;
2636         }
2637
2638         if (sta->hs20_deauth_req) {
2639                 wpa_printf(MSG_DEBUG, "HS 2.0: Send WNM-Notification to "
2640                            MACSTR " to indicate imminent deauthentication",
2641                            MAC2STR(sta->addr));
2642                 hs20_send_wnm_notification_deauth_req(hapd, sta->addr,
2643                                                       sta->hs20_deauth_req);
2644         }
2645 }
2646 #endif /* CONFIG_HS20 */
2647
2648
2649 static void ieee802_1x_finished(struct hostapd_data *hapd,
2650                                 struct sta_info *sta, int success,
2651                                 int remediation)
2652 {
2653         const u8 *key;
2654         size_t len;
2655         /* TODO: get PMKLifetime from WPA parameters */
2656         static const int dot11RSNAConfigPMKLifetime = 43200;
2657         unsigned int session_timeout;
2658
2659 #ifdef CONFIG_HS20
2660         if (remediation && !sta->remediation) {
2661                 sta->remediation = 1;
2662                 os_free(sta->remediation_url);
2663                 sta->remediation_url =
2664                         os_strdup(hapd->conf->subscr_remediation_url);
2665                 sta->remediation_method = 1; /* SOAP-XML SPP */
2666         }
2667
2668         if (success && (sta->remediation || sta->hs20_deauth_req)) {
2669                 wpa_printf(MSG_DEBUG, "HS 2.0: Schedule WNM-Notification to "
2670                            MACSTR " in 100 ms", MAC2STR(sta->addr));
2671                 eloop_cancel_timeout(ieee802_1x_wnm_notif_send, hapd, sta);
2672                 eloop_register_timeout(0, 100000, ieee802_1x_wnm_notif_send,
2673                                        hapd, sta);
2674         }
2675 #endif /* CONFIG_HS20 */
2676
2677         key = ieee802_1x_get_key(sta->eapol_sm, &len);
2678         if (sta->session_timeout_set)
2679                 session_timeout = sta->session_timeout;
2680         else
2681                 session_timeout = dot11RSNAConfigPMKLifetime;
2682         if (success && key && len >= PMK_LEN && !sta->remediation &&
2683             !sta->hs20_deauth_requested &&
2684             wpa_auth_pmksa_add(sta->wpa_sm, key, len, session_timeout,
2685                                sta->eapol_sm) == 0) {
2686                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
2687                                HOSTAPD_LEVEL_DEBUG,
2688                                "Added PMKSA cache entry (IEEE 802.1X)");
2689         }
2690
2691         if (!success) {
2692                 /*
2693                  * Many devices require deauthentication after WPS provisioning
2694                  * and some may not be be able to do that themselves, so
2695                  * disconnect the client here. In addition, this may also
2696                  * benefit IEEE 802.1X/EAPOL authentication cases, too since
2697                  * the EAPOL PAE state machine would remain in HELD state for
2698                  * considerable amount of time and some EAP methods, like
2699                  * EAP-FAST with anonymous provisioning, may require another
2700                  * EAPOL authentication to be started to complete connection.
2701                  */
2702                 wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "IEEE 802.1X: Force "
2703                         "disconnection after EAP-Failure");
2704                 /* Add a small sleep to increase likelihood of previously
2705                  * requested EAP-Failure TX getting out before this should the
2706                  * driver reorder operations.
2707                  */
2708                 os_sleep(0, 10000);
2709                 ap_sta_disconnect(hapd, sta, sta->addr,
2710                                   WLAN_REASON_IEEE_802_1X_AUTH_FAILED);
2711                 hostapd_wps_eap_completed(hapd);
2712         }
2713 }