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 static void ieee802_1x_finished(struct hostapd_data *hapd,
  38                                 struct sta_info *sta, int success,
  39                                 int remediation);
  40
  41
  42 static void ieee802_1x_send(struct hostapd_data *hapd, struct sta_info *sta,
  43                             u8 type, const u8 *data, size_t datalen)
  44 {
  45         u8 *buf;
  46         struct ieee802_1x_hdr *xhdr;
  47         size_t len;
  48         int encrypt = 0;
  49
  50         len = sizeof(*xhdr) + datalen;
  51         buf = os_zalloc(len);
  52         if (buf == NULL) {
  53                 wpa_printf(MSG_ERROR, "malloc() failed for "
  54                            "ieee802_1x_send(len=%lu)",
  55                            (unsigned long) len);
  56                 return;
  57         }
  58
  59         xhdr = (struct ieee802_1x_hdr *) buf;
  60         xhdr->version = hapd->conf->eapol_version;
  61         xhdr->type = type;
  62         xhdr->length = host_to_be16(datalen);
  63
  64         if (datalen > 0 && data != NULL)
  65                 os_memcpy(xhdr + 1, data, datalen);
  66
  67         if (wpa_auth_pairwise_set(sta->wpa_sm))
  68                 encrypt = 1;
  69 #ifdef CONFIG_TESTING_OPTIONS
  70         if (hapd->ext_eapol_frame_io) {
  71                 size_t hex_len = 2 * len + 1;
  72                 char *hex = os_malloc(hex_len);
  73
  74                 if (hex) {
  75                         wpa_snprintf_hex(hex, hex_len, buf, len);
  76                         wpa_msg(hapd->msg_ctx, MSG_INFO,
  77                                 "EAPOL-TX " MACSTR " %s",
  78                                 MAC2STR(sta->addr), hex);
  79                         os_free(hex);
  80                 }
  81         } else
  82 #endif /* CONFIG_TESTING_OPTIONS */
  83         if (sta->flags & WLAN_STA_PREAUTH) {
  84                 rsn_preauth_send(hapd, sta, buf, len);
  85         } else {
  86                 hostapd_drv_hapd_send_eapol(
  87                         hapd, sta->addr, buf, len,
  88                         encrypt, hostapd_sta_flags_to_drv(sta->flags));
  89         }
  90
  91         os_free(buf);
  92 }
  93
  94
  95 void ieee802_1x_set_sta_authorized(struct hostapd_data *hapd,
  96                                    struct sta_info *sta, int authorized)
  97 {
  98         int res;
  99
 100         if (sta->flags & WLAN_STA_PREAUTH)
 101                 return;
 102
 103         if (authorized) {
 104                 ap_sta_set_authorized(hapd, sta, 1);
 105                 res = hostapd_set_authorized(hapd, sta, 1);
 106                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 107                                HOSTAPD_LEVEL_DEBUG, "authorizing port");
 108         } else {
 109                 ap_sta_set_authorized(hapd, sta, 0);
 110                 res = hostapd_set_authorized(hapd, sta, 0);
 111                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 112                                HOSTAPD_LEVEL_DEBUG, "unauthorizing port");
 113         }
 114
 115         if (res && errno != ENOENT) {
 116                 wpa_printf(MSG_DEBUG, "Could not set station " MACSTR
 117                            " flags for kernel driver (errno=%d).",
 118                            MAC2STR(sta->addr), errno);
 119         }
 120
 121         if (authorized) {
 122                 os_get_reltime(&sta->connected_time);
 123                 accounting_sta_start(hapd, sta);
 124         }
 125 }
 126
 127
 128 #ifndef CONFIG_FIPS
 129 #ifndef CONFIG_NO_RC4
 130
 131 static void ieee802_1x_tx_key_one(struct hostapd_data *hapd,
 132                                   struct sta_info *sta,
 133                                   int idx, int broadcast,
 134                                   u8 *key_data, size_t key_len)
 135 {
 136         u8 *buf, *ekey;
 137         struct ieee802_1x_hdr *hdr;
 138         struct ieee802_1x_eapol_key *key;
 139         size_t len, ekey_len;
 140         struct eapol_state_machine *sm = sta->eapol_sm;
 141
 142         if (sm == NULL)
 143                 return;
 144
 145         len = sizeof(*key) + key_len;
 146         buf = os_zalloc(sizeof(*hdr) + len);
 147         if (buf == NULL)
 148                 return;
 149
 150         hdr = (struct ieee802_1x_hdr *) buf;
 151         key = (struct ieee802_1x_eapol_key *) (hdr + 1);
 152         key->type = EAPOL_KEY_TYPE_RC4;
 153         WPA_PUT_BE16(key->key_length, key_len);
 154         wpa_get_ntp_timestamp(key->replay_counter);
 155
 156         if (random_get_bytes(key->key_iv, sizeof(key->key_iv))) {
 157                 wpa_printf(MSG_ERROR, "Could not get random numbers");
 158                 os_free(buf);
 159                 return;
 160         }
 161
 162         key->key_index = idx | (broadcast ? 0 : BIT(7));
 163         if (hapd->conf->eapol_key_index_workaround) {
 164                 /* According to some information, WinXP Supplicant seems to
 165                  * interpret bit7 as an indication whether the key is to be
 166                  * activated, so make it possible to enable workaround that
 167                  * sets this bit for all keys. */
 168                 key->key_index |= BIT(7);
 169         }
 170
 171         /* Key is encrypted using "Key-IV + MSK[0..31]" as the RC4-key and
 172          * MSK[32..63] is used to sign the message. */
 173         if (sm->eap_if->eapKeyData == NULL || sm->eap_if->eapKeyDataLen < 64) {
 174                 wpa_printf(MSG_ERROR, "No eapKeyData available for encrypting "
 175                            "and signing EAPOL-Key");
 176                 os_free(buf);
 177                 return;
 178         }
 179         os_memcpy((u8 *) (key + 1), key_data, key_len);
 180         ekey_len = sizeof(key->key_iv) + 32;
 181         ekey = os_malloc(ekey_len);
 182         if (ekey == NULL) {
 183                 wpa_printf(MSG_ERROR, "Could not encrypt key");
 184                 os_free(buf);
 185                 return;
 186         }
 187         os_memcpy(ekey, key->key_iv, sizeof(key->key_iv));
 188         os_memcpy(ekey + sizeof(key->key_iv), sm->eap_if->eapKeyData, 32);
 189         rc4_skip(ekey, ekey_len, 0, (u8 *) (key + 1), key_len);
 190         os_free(ekey);
 191
 192         /* This header is needed here for HMAC-MD5, but it will be regenerated
 193          * in ieee802_1x_send() */
 194         hdr->version = hapd->conf->eapol_version;
 195         hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
 196         hdr->length = host_to_be16(len);
 197         hmac_md5(sm->eap_if->eapKeyData + 32, 32, buf, sizeof(*hdr) + len,
 198                  key->key_signature);
 199
 200         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key to " MACSTR
 201                    " (%s index=%d)", MAC2STR(sm->addr),
 202                    broadcast ? "broadcast" : "unicast", idx);
 203         ieee802_1x_send(hapd, sta, IEEE802_1X_TYPE_EAPOL_KEY, (u8 *) key, len);
 204         if (sta->eapol_sm)
 205                 sta->eapol_sm->dot1xAuthEapolFramesTx++;
 206         os_free(buf);
 207 }
 208
 209
 210 static void ieee802_1x_tx_key(struct hostapd_data *hapd, struct sta_info *sta)
 211 {
 212         struct eapol_authenticator *eapol = hapd->eapol_auth;
 213         struct eapol_state_machine *sm = sta->eapol_sm;
 214
 215         if (sm == NULL || !sm->eap_if->eapKeyData)
 216                 return;
 217
 218         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key(s) to " MACSTR,
 219                    MAC2STR(sta->addr));
 220
 221 #ifndef CONFIG_NO_VLAN
 222         if (sta->vlan_id > 0 && sta->vlan_id <= MAX_VLAN_ID) {
 223                 wpa_printf(MSG_ERROR, "Using WEP with vlans is not supported.");
 224                 return;
 225         }
 226 #endif /* CONFIG_NO_VLAN */
 227
 228         if (eapol->default_wep_key) {
 229                 ieee802_1x_tx_key_one(hapd, sta, eapol->default_wep_key_idx, 1,
 230                                       eapol->default_wep_key,
 231                                       hapd->conf->default_wep_key_len);
 232         }
 233
 234         if (hapd->conf->individual_wep_key_len > 0) {
 235                 u8 *ikey;
 236                 ikey = os_malloc(hapd->conf->individual_wep_key_len);
 237                 if (ikey == NULL ||
 238                     random_get_bytes(ikey, hapd->conf->individual_wep_key_len))
 239                 {
 240                         wpa_printf(MSG_ERROR, "Could not generate random "
 241                                    "individual WEP key.");
 242                         os_free(ikey);
 243                         return;
 244                 }
 245
 246                 wpa_hexdump_key(MSG_DEBUG, "Individual WEP key",
 247                                 ikey, hapd->conf->individual_wep_key_len);
 248
 249                 ieee802_1x_tx_key_one(hapd, sta, 0, 0, ikey,
 250                                       hapd->conf->individual_wep_key_len);
 251
 252                 /* TODO: set encryption in TX callback, i.e., only after STA
 253                  * has ACKed EAPOL-Key frame */
 254                 if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
 255                                         sta->addr, 0, 1, NULL, 0, ikey,
 256                                         hapd->conf->individual_wep_key_len)) {
 257                         wpa_printf(MSG_ERROR, "Could not set individual WEP "
 258                                    "encryption.");
 259                 }
 260
 261                 os_free(ikey);
 262         }
 263 }
 264
 265 #endif /* CONFIG_NO_RC4 */
 266 #endif /* CONFIG_FIPS */
 267
 268
 269 const char *radius_mode_txt(struct hostapd_data *hapd)
 270 {
 271         switch (hapd->iface->conf->hw_mode) {
 272         case HOSTAPD_MODE_IEEE80211AD:
 273                 return "802.11ad";
 274         case HOSTAPD_MODE_IEEE80211A:
 275                 return "802.11a";
 276         case HOSTAPD_MODE_IEEE80211G:
 277                 return "802.11g";
 278         case HOSTAPD_MODE_IEEE80211B:
 279         default:
 280                 return "802.11b";
 281         }
 282 }
 283
 284
 285 int radius_sta_rate(struct hostapd_data *hapd, struct sta_info *sta)
 286 {
 287         int i;
 288         u8 rate = 0;
 289
 290         for (i = 0; i < sta->supported_rates_len; i++)
 291                 if ((sta->supported_rates[i] & 0x7f) > rate)
 292                         rate = sta->supported_rates[i] & 0x7f;
 293
 294         return rate;
 295 }
 296
 297
 298 #ifndef CONFIG_NO_RADIUS
 299 static void ieee802_1x_learn_identity(struct hostapd_data *hapd,
 300                                       struct eapol_state_machine *sm,
 301                                       const u8 *eap, size_t len)
 302 {
 303         const u8 *identity;
 304         size_t identity_len;
 305         const struct eap_hdr *hdr = (const struct eap_hdr *) eap;
 306
 307         if (len <= sizeof(struct eap_hdr) ||
 308             (hdr->code == EAP_CODE_RESPONSE &&
 309              eap[sizeof(struct eap_hdr)] != EAP_TYPE_IDENTITY) ||
 310             (hdr->code == EAP_CODE_INITIATE &&
 311              eap[sizeof(struct eap_hdr)] != EAP_ERP_TYPE_REAUTH) ||
 312             (hdr->code != EAP_CODE_RESPONSE &&
 313              hdr->code != EAP_CODE_INITIATE))
 314                 return;
 315
 316         identity = eap_get_identity(sm->eap, &identity_len);
 317         if (identity == NULL)
 318                 return;
 319
 320         /* Save station identity for future RADIUS packets */
 321         os_free(sm->identity);
 322         sm->identity = (u8 *) dup_binstr(identity, identity_len);
 323         if (sm->identity == NULL) {
 324                 sm->identity_len = 0;
 325                 return;
 326         }
 327
 328         sm->identity_len = identity_len;
 329         hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
 330                        HOSTAPD_LEVEL_DEBUG, "STA identity '%s'", sm->identity);
 331         sm->dot1xAuthEapolRespIdFramesRx++;
 332 }
 333
 334
 335 static int add_common_radius_sta_attr_rsn(struct hostapd_data *hapd,
 336                                           struct hostapd_radius_attr *req_attr,
 337                                           struct sta_info *sta,
 338                                           struct radius_msg *msg)
 339 {
 340         u32 suite;
 341         int ver, val;
 342
 343         ver = wpa_auth_sta_wpa_version(sta->wpa_sm);
 344         val = wpa_auth_get_pairwise(sta->wpa_sm);
 345         suite = wpa_cipher_to_suite(ver, val);
 346         if (val != -1 &&
 347             !hostapd_config_get_radius_attr(req_attr,
 348                                             RADIUS_ATTR_WLAN_PAIRWISE_CIPHER) &&
 349             !radius_msg_add_attr_int32(msg, RADIUS_ATTR_WLAN_PAIRWISE_CIPHER,
 350                                        suite)) {
 351                 wpa_printf(MSG_ERROR, "Could not add WLAN-Pairwise-Cipher");
 352                 return -1;
 353         }
 354
 355         suite = wpa_cipher_to_suite(((hapd->conf->wpa & 0x2) ||
 356                                      hapd->conf->osen) ?
 357                                     WPA_PROTO_RSN : WPA_PROTO_WPA,
 358                                     hapd->conf->wpa_group);
 359         if (!hostapd_config_get_radius_attr(req_attr,
 360                                             RADIUS_ATTR_WLAN_GROUP_CIPHER) &&
 361             !radius_msg_add_attr_int32(msg, RADIUS_ATTR_WLAN_GROUP_CIPHER,
 362                                        suite)) {
 363                 wpa_printf(MSG_ERROR, "Could not add WLAN-Group-Cipher");
 364                 return -1;
 365         }
 366
 367         val = wpa_auth_sta_key_mgmt(sta->wpa_sm);
 368         suite = wpa_akm_to_suite(val);
 369         if (val != -1 &&
 370             !hostapd_config_get_radius_attr(req_attr,
 371                                             RADIUS_ATTR_WLAN_AKM_SUITE) &&
 372             !radius_msg_add_attr_int32(msg, RADIUS_ATTR_WLAN_AKM_SUITE,
 373                                        suite)) {
 374                 wpa_printf(MSG_ERROR, "Could not add WLAN-AKM-Suite");
 375                 return -1;
 376         }
 377
 378 #ifdef CONFIG_IEEE80211W
 379         if (hapd->conf->ieee80211w != NO_MGMT_FRAME_PROTECTION) {
 380                 suite = wpa_cipher_to_suite(WPA_PROTO_RSN,
 381                                             hapd->conf->group_mgmt_cipher);
 382                 if (!hostapd_config_get_radius_attr(
 383                             req_attr, RADIUS_ATTR_WLAN_GROUP_MGMT_CIPHER) &&
 384                     !radius_msg_add_attr_int32(
 385                             msg, RADIUS_ATTR_WLAN_GROUP_MGMT_CIPHER, suite)) {
 386                         wpa_printf(MSG_ERROR,
 387                                    "Could not add WLAN-Group-Mgmt-Cipher");
 388                         return -1;
 389                 }
 390         }
 391 #endif /* CONFIG_IEEE80211W */
 392
 393         return 0;
 394 }
 395
 396
 397 static int add_common_radius_sta_attr(struct hostapd_data *hapd,
 398                                       struct hostapd_radius_attr *req_attr,
 399                                       struct sta_info *sta,
 400                                       struct radius_msg *msg)
 401 {
 402         char buf[128];
 403
 404         if (!hostapd_config_get_radius_attr(req_attr,
 405                                             RADIUS_ATTR_NAS_PORT) &&
 406             !radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT, sta->aid)) {
 407                 wpa_printf(MSG_ERROR, "Could not add NAS-Port");
 408                 return -1;
 409         }
 410
 411         os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
 412                     MAC2STR(sta->addr));
 413         buf[sizeof(buf) - 1] = '\0';
 414         if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID,
 415                                  (u8 *) buf, os_strlen(buf))) {
 416                 wpa_printf(MSG_ERROR, "Could not add Calling-Station-Id");
 417                 return -1;
 418         }
 419
 420         if (sta->flags & WLAN_STA_PREAUTH) {
 421                 os_strlcpy(buf, "IEEE 802.11i Pre-Authentication",
 422                            sizeof(buf));
 423         } else {
 424                 os_snprintf(buf, sizeof(buf), "CONNECT %d%sMbps %s",
 425                             radius_sta_rate(hapd, sta) / 2,
 426                             (radius_sta_rate(hapd, sta) & 1) ? ".5" : "",
 427                             radius_mode_txt(hapd));
 428                 buf[sizeof(buf) - 1] = '\0';
 429         }
 430         if (!hostapd_config_get_radius_attr(req_attr,
 431                                             RADIUS_ATTR_CONNECT_INFO) &&
 432             !radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO,
 433                                  (u8 *) buf, os_strlen(buf))) {
 434                 wpa_printf(MSG_ERROR, "Could not add Connect-Info");
 435                 return -1;
 436         }
 437
 438         if (sta->acct_session_id_hi || sta->acct_session_id_lo) {
 439                 os_snprintf(buf, sizeof(buf), "%08X-%08X",
 440                             sta->acct_session_id_hi, sta->acct_session_id_lo);
 441                 if (!radius_msg_add_attr(msg, RADIUS_ATTR_ACCT_SESSION_ID,
 442                                          (u8 *) buf, os_strlen(buf))) {
 443                         wpa_printf(MSG_ERROR, "Could not add Acct-Session-Id");
 444                         return -1;
 445                 }
 446         }
 447
 448 #ifdef CONFIG_IEEE80211R
 449         if (hapd->conf->wpa && wpa_key_mgmt_ft(hapd->conf->wpa_key_mgmt) &&
 450             sta->wpa_sm &&
 451             (wpa_key_mgmt_ft(wpa_auth_sta_key_mgmt(sta->wpa_sm)) ||
 452              sta->auth_alg == WLAN_AUTH_FT) &&
 453             !hostapd_config_get_radius_attr(req_attr,
 454                                             RADIUS_ATTR_MOBILITY_DOMAIN_ID) &&
 455             !radius_msg_add_attr_int32(msg, RADIUS_ATTR_MOBILITY_DOMAIN_ID,
 456                                        WPA_GET_BE16(
 457                                                hapd->conf->mobility_domain))) {
 458                 wpa_printf(MSG_ERROR, "Could not add Mobility-Domain-Id");
 459                 return -1;
 460         }
 461 #endif /* CONFIG_IEEE80211R */
 462
 463         if ((hapd->conf->wpa || hapd->conf->osen) && sta->wpa_sm &&
 464             add_common_radius_sta_attr_rsn(hapd, req_attr, sta, msg) < 0)
 465                 return -1;
 466
 467         return 0;
 468 }
 469
 470
 471 int add_common_radius_attr(struct hostapd_data *hapd,
 472                            struct hostapd_radius_attr *req_attr,
 473                            struct sta_info *sta,
 474                            struct radius_msg *msg)
 475 {
 476         char buf[128];
 477         struct hostapd_radius_attr *attr;
 478
 479         if (!hostapd_config_get_radius_attr(req_attr,
 480                                             RADIUS_ATTR_NAS_IP_ADDRESS) &&
 481             hapd->conf->own_ip_addr.af == AF_INET &&
 482             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS,
 483                                  (u8 *) &hapd->conf->own_ip_addr.u.v4, 4)) {
 484                 wpa_printf(MSG_ERROR, "Could not add NAS-IP-Address");
 485                 return -1;
 486         }
 487
 488 #ifdef CONFIG_IPV6
 489         if (!hostapd_config_get_radius_attr(req_attr,
 490                                             RADIUS_ATTR_NAS_IPV6_ADDRESS) &&
 491             hapd->conf->own_ip_addr.af == AF_INET6 &&
 492             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IPV6_ADDRESS,
 493                                  (u8 *) &hapd->conf->own_ip_addr.u.v6, 16)) {
 494                 wpa_printf(MSG_ERROR, "Could not add NAS-IPv6-Address");
 495                 return -1;
 496         }
 497 #endif /* CONFIG_IPV6 */
 498
 499         if (!hostapd_config_get_radius_attr(req_attr,
 500                                             RADIUS_ATTR_NAS_IDENTIFIER) &&
 501             hapd->conf->nas_identifier &&
 502             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IDENTIFIER,
 503                                  (u8 *) hapd->conf->nas_identifier,
 504                                  os_strlen(hapd->conf->nas_identifier))) {
 505                 wpa_printf(MSG_ERROR, "Could not add NAS-Identifier");
 506                 return -1;
 507         }
 508
 509         os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT ":%s",
 510                     MAC2STR(hapd->own_addr),
 511                     wpa_ssid_txt(hapd->conf->ssid.ssid,
 512                                  hapd->conf->ssid.ssid_len));
 513         buf[sizeof(buf) - 1] = '\0';
 514         if (!hostapd_config_get_radius_attr(req_attr,
 515                                             RADIUS_ATTR_CALLED_STATION_ID) &&
 516             !radius_msg_add_attr(msg, RADIUS_ATTR_CALLED_STATION_ID,
 517                                  (u8 *) buf, os_strlen(buf))) {
 518                 wpa_printf(MSG_ERROR, "Could not add Called-Station-Id");
 519                 return -1;
 520         }
 521
 522         if (!hostapd_config_get_radius_attr(req_attr,
 523                                             RADIUS_ATTR_NAS_PORT_TYPE) &&
 524             !radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT_TYPE,
 525                                        RADIUS_NAS_PORT_TYPE_IEEE_802_11)) {
 526                 wpa_printf(MSG_ERROR, "Could not add NAS-Port-Type");
 527                 return -1;
 528         }
 529
 530 #ifdef CONFIG_INTERWORKING
 531         if (hapd->conf->interworking &&
 532             !is_zero_ether_addr(hapd->conf->hessid)) {
 533                 os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
 534                             MAC2STR(hapd->conf->hessid));
 535                 buf[sizeof(buf) - 1] = '\0';
 536                 if (!hostapd_config_get_radius_attr(req_attr,
 537                                                     RADIUS_ATTR_WLAN_HESSID) &&
 538                     !radius_msg_add_attr(msg, RADIUS_ATTR_WLAN_HESSID,
 539                                          (u8 *) buf, os_strlen(buf))) {
 540                         wpa_printf(MSG_ERROR, "Could not add WLAN-HESSID");
 541                         return -1;
 542                 }
 543         }
 544 #endif /* CONFIG_INTERWORKING */
 545
 546         if (sta && add_common_radius_sta_attr(hapd, req_attr, sta, msg) < 0)
 547                 return -1;
 548
 549         for (attr = req_attr; attr; attr = attr->next) {
 550                 if (!radius_msg_add_attr(msg, attr->type,
 551                                          wpabuf_head(attr->val),
 552                                          wpabuf_len(attr->val))) {
 553                         wpa_printf(MSG_ERROR, "Could not add RADIUS "
 554                                    "attribute");
 555                         return -1;
 556                 }
 557         }
 558
 559         return 0;
 560 }
 561
 562
 563 static void ieee802_1x_encapsulate_radius(struct hostapd_data *hapd,
 564                                           struct sta_info *sta,
 565                                           const u8 *eap, size_t len)
 566 {
 567         struct radius_msg *msg;
 568         struct eapol_state_machine *sm = sta->eapol_sm;
 569
 570         if (sm == NULL)
 571                 return;
 572
 573         ieee802_1x_learn_identity(hapd, sm, eap, len);
 574
 575         wpa_printf(MSG_DEBUG, "Encapsulating EAP message into a RADIUS "
 576                    "packet");
 577
 578         sm->radius_identifier = radius_client_get_id(hapd->radius);
 579         msg = radius_msg_new(RADIUS_CODE_ACCESS_REQUEST,
 580                              sm->radius_identifier);
 581         if (msg == NULL) {
 582                 wpa_printf(MSG_INFO, "Could not create new RADIUS packet");
 583                 return;
 584         }
 585
 586         radius_msg_make_authenticator(msg, (u8 *) sta, sizeof(*sta));
 587
 588         if (sm->identity &&
 589             !radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME,
 590                                  sm->identity, sm->identity_len)) {
 591                 wpa_printf(MSG_INFO, "Could not add User-Name");
 592                 goto fail;
 593         }
 594
 595         if (add_common_radius_attr(hapd, hapd->conf->radius_auth_req_attr, sta,
 596                                    msg) < 0)
 597                 goto fail;
 598
 599         /* TODO: should probably check MTU from driver config; 2304 is max for
 600          * IEEE 802.11, but use 1400 to avoid problems with too large packets
 601          */
 602         if (!hostapd_config_get_radius_attr(hapd->conf->radius_auth_req_attr,
 603                                             RADIUS_ATTR_FRAMED_MTU) &&
 604             !radius_msg_add_attr_int32(msg, RADIUS_ATTR_FRAMED_MTU, 1400)) {
 605                 wpa_printf(MSG_INFO, "Could not add Framed-MTU");
 606                 goto fail;
 607         }
 608
 609         if (!radius_msg_add_eap(msg, eap, len)) {
 610                 wpa_printf(MSG_INFO, "Could not add EAP-Message");
 611                 goto fail;
 612         }
 613
 614         /* State attribute must be copied if and only if this packet is
 615          * Access-Request reply to the previous Access-Challenge */
 616         if (sm->last_recv_radius &&
 617             radius_msg_get_hdr(sm->last_recv_radius)->code ==
 618             RADIUS_CODE_ACCESS_CHALLENGE) {
 619                 int res = radius_msg_copy_attr(msg, sm->last_recv_radius,
 620                                                RADIUS_ATTR_STATE);
 621                 if (res < 0) {
 622                         wpa_printf(MSG_INFO, "Could not copy State attribute from previous Access-Challenge");
 623                         goto fail;
 624                 }
 625                 if (res > 0) {
 626                         wpa_printf(MSG_DEBUG, "Copied RADIUS State Attribute");
 627                 }
 628         }
 629
 630         if (hapd->conf->radius_request_cui) {
 631                 const u8 *cui;
 632                 size_t cui_len;
 633                 /* Add previously learned CUI or nul CUI to request CUI */
 634                 if (sm->radius_cui) {
 635                         cui = wpabuf_head(sm->radius_cui);
 636                         cui_len = wpabuf_len(sm->radius_cui);
 637                 } else {
 638                         cui = (const u8 *) "\0";
 639                         cui_len = 1;
 640                 }
 641                 if (!radius_msg_add_attr(msg,
 642                                          RADIUS_ATTR_CHARGEABLE_USER_IDENTITY,
 643                                          cui, cui_len)) {
 644                         wpa_printf(MSG_ERROR, "Could not add CUI");
 645                         goto fail;
 646                 }
 647         }
 648
 649 #ifdef CONFIG_HS20
 650         if (hapd->conf->hs20) {
 651                 u8 ver = 1; /* Release 2 */
 652                 if (!radius_msg_add_wfa(
 653                             msg, RADIUS_VENDOR_ATTR_WFA_HS20_AP_VERSION,
 654                             &ver, 1)) {
 655                         wpa_printf(MSG_ERROR, "Could not add HS 2.0 AP "
 656                                    "version");
 657                         goto fail;
 658                 }
 659
 660                 if (sta->hs20_ie && wpabuf_len(sta->hs20_ie) > 0) {
 661                         const u8 *pos;
 662                         u8 buf[3];
 663                         u16 id;
 664                         pos = wpabuf_head_u8(sta->hs20_ie);
 665                         buf[0] = (*pos) >> 4;
 666                         if (((*pos) & HS20_PPS_MO_ID_PRESENT) &&
 667                             wpabuf_len(sta->hs20_ie) >= 3)
 668                                 id = WPA_GET_LE16(pos + 1);
 669                         else
 670                                 id = 0;
 671                         WPA_PUT_BE16(buf + 1, id);
 672                         if (!radius_msg_add_wfa(
 673                                     msg,
 674                                     RADIUS_VENDOR_ATTR_WFA_HS20_STA_VERSION,
 675                                     buf, sizeof(buf))) {
 676                                 wpa_printf(MSG_ERROR, "Could not add HS 2.0 "
 677                                            "STA version");
 678                                 goto fail;
 679                         }
 680                 }
 681         }
 682 #endif /* CONFIG_HS20 */
 683
 684         if (radius_client_send(hapd->radius, msg, RADIUS_AUTH, sta->addr) < 0)
 685                 goto fail;
 686
 687         return;
 688
 689  fail:
 690         radius_msg_free(msg);
 691 }
 692 #endif /* CONFIG_NO_RADIUS */
 693
 694
 695 static void handle_eap_response(struct hostapd_data *hapd,
 696                                 struct sta_info *sta, struct eap_hdr *eap,
 697                                 size_t len)
 698 {
 699         u8 type, *data;
 700         struct eapol_state_machine *sm = sta->eapol_sm;
 701         if (sm == NULL)
 702                 return;
 703
 704         data = (u8 *) (eap + 1);
 705
 706         if (len < sizeof(*eap) + 1) {
 707                 wpa_printf(MSG_INFO, "handle_eap_response: too short response data");
 708                 return;
 709         }
 710
 711         sm->eap_type_supp = type = data[0];
 712
 713         hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
 714                        HOSTAPD_LEVEL_DEBUG, "received EAP packet (code=%d "
 715                        "id=%d len=%d) from STA: EAP Response-%s (%d)",
 716                        eap->code, eap->identifier, be_to_host16(eap->length),
 717                        eap_server_get_name(0, type), type);
 718
 719         sm->dot1xAuthEapolRespFramesRx++;
 720
 721         wpabuf_free(sm->eap_if->eapRespData);
 722         sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len);
 723         sm->eapolEap = TRUE;
 724 }
 725
 726
 727 static void handle_eap_initiate(struct hostapd_data *hapd,
 728                                 struct sta_info *sta, struct eap_hdr *eap,
 729                                 size_t len)
 730 {
 731 #ifdef CONFIG_ERP
 732         u8 type, *data;
 733         struct eapol_state_machine *sm = sta->eapol_sm;
 734
 735         if (sm == NULL)
 736                 return;
 737
 738         if (len < sizeof(*eap) + 1) {
 739                 wpa_printf(MSG_INFO,
 740                            "handle_eap_initiate: too short response data");
 741                 return;
 742         }
 743
 744         data = (u8 *) (eap + 1);
 745         type = data[0];
 746
 747         hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
 748                        HOSTAPD_LEVEL_DEBUG, "received EAP packet (code=%d "
 749                        "id=%d len=%d) from STA: EAP Initiate type %u",
 750                        eap->code, eap->identifier, be_to_host16(eap->length),
 751                        type);
 752
 753         wpabuf_free(sm->eap_if->eapRespData);
 754         sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len);
 755         sm->eapolEap = TRUE;
 756 #endif /* CONFIG_ERP */
 757 }
 758
 759
 760 /* Process incoming EAP packet from Supplicant */
 761 static void handle_eap(struct hostapd_data *hapd, struct sta_info *sta,
 762                        u8 *buf, size_t len)
 763 {
 764         struct eap_hdr *eap;
 765         u16 eap_len;
 766
 767         if (len < sizeof(*eap)) {
 768                 wpa_printf(MSG_INFO, "   too short EAP packet");
 769                 return;
 770         }
 771
 772         eap = (struct eap_hdr *) buf;
 773
 774         eap_len = be_to_host16(eap->length);
 775         wpa_printf(MSG_DEBUG, "EAP: code=%d identifier=%d length=%d",
 776                    eap->code, eap->identifier, eap_len);
 777         if (eap_len < sizeof(*eap)) {
 778                 wpa_printf(MSG_DEBUG, "   Invalid EAP length");
 779                 return;
 780         } else if (eap_len > len) {
 781                 wpa_printf(MSG_DEBUG, "   Too short frame to contain this EAP "
 782                            "packet");
 783                 return;
 784         } else if (eap_len < len) {
 785                 wpa_printf(MSG_DEBUG, "   Ignoring %lu extra bytes after EAP "
 786                            "packet", (unsigned long) len - eap_len);
 787         }
 788
 789         switch (eap->code) {
 790         case EAP_CODE_REQUEST:
 791                 wpa_printf(MSG_DEBUG, " (request)");
 792                 return;
 793         case EAP_CODE_RESPONSE:
 794                 wpa_printf(MSG_DEBUG, " (response)");
 795                 handle_eap_response(hapd, sta, eap, eap_len);
 796                 break;
 797         case EAP_CODE_SUCCESS:
 798                 wpa_printf(MSG_DEBUG, " (success)");
 799                 return;
 800         case EAP_CODE_FAILURE:
 801                 wpa_printf(MSG_DEBUG, " (failure)");
 802                 return;
 803         case EAP_CODE_INITIATE:
 804                 wpa_printf(MSG_DEBUG, " (initiate)");
 805                 handle_eap_initiate(hapd, sta, eap, eap_len);
 806                 break;
 807         case EAP_CODE_FINISH:
 808                 wpa_printf(MSG_DEBUG, " (finish)");
 809                 break;
 810         default:
 811                 wpa_printf(MSG_DEBUG, " (unknown code)");
 812                 return;
 813         }
 814 }
 815
 816
 817 static struct eapol_state_machine *
 818 ieee802_1x_alloc_eapol_sm(struct hostapd_data *hapd, struct sta_info *sta)
 819 {
 820         int flags = 0;
 821         if (sta->flags & WLAN_STA_PREAUTH)
 822                 flags |= EAPOL_SM_PREAUTH;
 823         if (sta->wpa_sm) {
 824                 flags |= EAPOL_SM_USES_WPA;
 825                 if (wpa_auth_sta_get_pmksa(sta->wpa_sm))
 826                         flags |= EAPOL_SM_FROM_PMKSA_CACHE;
 827         }
 828         return eapol_auth_alloc(hapd->eapol_auth, sta->addr, flags,
 829                                 sta->wps_ie, sta->p2p_ie, sta,
 830                                 sta->identity, sta->radius_cui);
 831 }
 832
 833
 834 /**
 835  * ieee802_1x_receive - Process the EAPOL frames from the Supplicant
 836  * @hapd: hostapd BSS data
 837  * @sa: Source address (sender of the EAPOL frame)
 838  * @buf: EAPOL frame
 839  * @len: Length of buf in octets
 840  *
 841  * This function is called for each incoming EAPOL frame from the interface
 842  */
 843 void ieee802_1x_receive(struct hostapd_data *hapd, const u8 *sa, const u8 *buf,
 844                         size_t len)
 845 {
 846         struct sta_info *sta;
 847         struct ieee802_1x_hdr *hdr;
 848         struct ieee802_1x_eapol_key *key;
 849         u16 datalen;
 850         struct rsn_pmksa_cache_entry *pmksa;
 851         int key_mgmt;
 852
 853         if (!hapd->conf->ieee802_1x && !hapd->conf->wpa && !hapd->conf->osen &&
 854             !hapd->conf->wps_state)
 855                 return;
 856
 857         wpa_printf(MSG_DEBUG, "IEEE 802.1X: %lu bytes from " MACSTR,
 858                    (unsigned long) len, MAC2STR(sa));
 859         sta = ap_get_sta(hapd, sa);
 860         if (!sta || (!(sta->flags & (WLAN_STA_ASSOC | WLAN_STA_PREAUTH)) &&
 861                      !(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_WIRED))) {
 862                 wpa_printf(MSG_DEBUG, "IEEE 802.1X data frame from not "
 863                            "associated/Pre-authenticating STA");
 864                 return;
 865         }
 866
 867         if (len < sizeof(*hdr)) {
 868                 wpa_printf(MSG_INFO, "   too short IEEE 802.1X packet");
 869                 return;
 870         }
 871
 872         hdr = (struct ieee802_1x_hdr *) buf;
 873         datalen = be_to_host16(hdr->length);
 874         wpa_printf(MSG_DEBUG, "   IEEE 802.1X: version=%d type=%d length=%d",
 875                    hdr->version, hdr->type, datalen);
 876
 877         if (len - sizeof(*hdr) < datalen) {
 878                 wpa_printf(MSG_INFO, "   frame too short for this IEEE 802.1X packet");
 879                 if (sta->eapol_sm)
 880                         sta->eapol_sm->dot1xAuthEapLengthErrorFramesRx++;
 881                 return;
 882         }
 883         if (len - sizeof(*hdr) > datalen) {
 884                 wpa_printf(MSG_DEBUG, "   ignoring %lu extra octets after "
 885                            "IEEE 802.1X packet",
 886                            (unsigned long) len - sizeof(*hdr) - datalen);
 887         }
 888
 889         if (sta->eapol_sm) {
 890                 sta->eapol_sm->dot1xAuthLastEapolFrameVersion = hdr->version;
 891                 sta->eapol_sm->dot1xAuthEapolFramesRx++;
 892         }
 893
 894         key = (struct ieee802_1x_eapol_key *) (hdr + 1);
 895         if (datalen >= sizeof(struct ieee802_1x_eapol_key) &&
 896             hdr->type == IEEE802_1X_TYPE_EAPOL_KEY &&
 897             (key->type == EAPOL_KEY_TYPE_WPA ||
 898              key->type == EAPOL_KEY_TYPE_RSN)) {
 899                 wpa_receive(hapd->wpa_auth, sta->wpa_sm, (u8 *) hdr,
 900                             sizeof(*hdr) + datalen);
 901                 return;
 902         }
 903
 904         if (!hapd->conf->ieee802_1x && !hapd->conf->osen &&
 905             !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) {
 906                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore EAPOL message - "
 907                            "802.1X not enabled and WPS not used");
 908                 return;
 909         }
 910
 911         key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm);
 912         if (key_mgmt != -1 && wpa_key_mgmt_wpa_psk(key_mgmt)) {
 913                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore EAPOL message - "
 914                            "STA is using PSK");
 915                 return;
 916         }
 917
 918         if (!sta->eapol_sm) {
 919                 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
 920                 if (!sta->eapol_sm)
 921                         return;
 922
 923 #ifdef CONFIG_WPS
 924                 if (!hapd->conf->ieee802_1x && hapd->conf->wps_state) {
 925                         u32 wflags = sta->flags & (WLAN_STA_WPS |
 926                                                    WLAN_STA_WPS2 |
 927                                                    WLAN_STA_MAYBE_WPS);
 928                         if (wflags == WLAN_STA_MAYBE_WPS ||
 929                             wflags == (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) {
 930                                 /*
 931                                  * Delay EAPOL frame transmission until a
 932                                  * possible WPS STA initiates the handshake
 933                                  * with EAPOL-Start. Only allow the wait to be
 934                                  * skipped if the STA is known to support WPS
 935                                  * 2.0.
 936                                  */
 937                                 wpa_printf(MSG_DEBUG, "WPS: Do not start "
 938                                            "EAPOL until EAPOL-Start is "
 939                                            "received");
 940                                 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
 941                         }
 942                 }
 943 #endif /* CONFIG_WPS */
 944
 945                 sta->eapol_sm->eap_if->portEnabled = TRUE;
 946         }
 947
 948         /* since we support version 1, we can ignore version field and proceed
 949          * as specified in version 1 standard [IEEE Std 802.1X-2001, 7.5.5] */
 950         /* TODO: actually, we are not version 1 anymore.. However, Version 2
 951          * does not change frame contents, so should be ok to process frames
 952          * more or less identically. Some changes might be needed for
 953          * verification of fields. */
 954
 955         switch (hdr->type) {
 956         case IEEE802_1X_TYPE_EAP_PACKET:
 957                 handle_eap(hapd, sta, (u8 *) (hdr + 1), datalen);
 958                 break;
 959
 960         case IEEE802_1X_TYPE_EAPOL_START:
 961                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 962                                HOSTAPD_LEVEL_DEBUG, "received EAPOL-Start "
 963                                "from STA");
 964                 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
 965                 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
 966                 if (pmksa) {
 967                         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
 968                                        HOSTAPD_LEVEL_DEBUG, "cached PMKSA "
 969                                        "available - ignore it since "
 970                                        "STA sent EAPOL-Start");
 971                         wpa_auth_sta_clear_pmksa(sta->wpa_sm, pmksa);
 972                 }
 973                 sta->eapol_sm->eapolStart = TRUE;
 974                 sta->eapol_sm->dot1xAuthEapolStartFramesRx++;
 975                 eap_server_clear_identity(sta->eapol_sm->eap);
 976                 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
 977                 break;
 978
 979         case IEEE802_1X_TYPE_EAPOL_LOGOFF:
 980                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 981                                HOSTAPD_LEVEL_DEBUG, "received EAPOL-Logoff "
 982                                "from STA");
 983                 sta->acct_terminate_cause =
 984                         RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
 985                 accounting_sta_stop(hapd, sta);
 986                 sta->eapol_sm->eapolLogoff = TRUE;
 987                 sta->eapol_sm->dot1xAuthEapolLogoffFramesRx++;
 988                 eap_server_clear_identity(sta->eapol_sm->eap);
 989                 break;
 990
 991         case IEEE802_1X_TYPE_EAPOL_KEY:
 992                 wpa_printf(MSG_DEBUG, "   EAPOL-Key");
 993                 if (!ap_sta_is_authorized(sta)) {
 994                         wpa_printf(MSG_DEBUG, "   Dropped key data from "
 995                                    "unauthorized Supplicant");
 996                         break;
 997                 }
 998                 break;
 999
1000         case IEEE802_1X_TYPE_EAPOL_ENCAPSULATED_ASF_ALERT:
1001                 wpa_printf(MSG_DEBUG, "   EAPOL-Encapsulated-ASF-Alert");
1002                 /* TODO: implement support for this; show data */
1003                 break;
1004
1005         default:
1006                 wpa_printf(MSG_DEBUG, "   unknown IEEE 802.1X packet type");
1007                 sta->eapol_sm->dot1xAuthInvalidEapolFramesRx++;
1008                 break;
1009         }
1010
1011         eapol_auth_step(sta->eapol_sm);
1012 }
1013
1014
1015 /**
1016  * ieee802_1x_new_station - Start IEEE 802.1X authentication
1017  * @hapd: hostapd BSS data
1018  * @sta: The station
1019  *
1020  * This function is called to start IEEE 802.1X authentication when a new
1021  * station completes IEEE 802.11 association.
1022  */
1023 void ieee802_1x_new_station(struct hostapd_data *hapd, struct sta_info *sta)
1024 {
1025         struct rsn_pmksa_cache_entry *pmksa;
1026         int reassoc = 1;
1027         int force_1x = 0;
1028         int key_mgmt;
1029
1030 #ifdef CONFIG_WPS
1031         if (hapd->conf->wps_state &&
1032             ((hapd->conf->wpa && (sta->flags & WLAN_STA_MAYBE_WPS)) ||
1033              (sta->flags & WLAN_STA_WPS))) {
1034                 /*
1035                  * Need to enable IEEE 802.1X/EAPOL state machines for possible
1036                  * WPS handshake even if IEEE 802.1X/EAPOL is not used for
1037                  * authentication in this BSS.
1038                  */
1039                 force_1x = 1;
1040         }
1041 #endif /* CONFIG_WPS */
1042
1043         if (!force_1x && !hapd->conf->ieee802_1x && !hapd->conf->osen) {
1044                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - "
1045                            "802.1X not enabled or forced for WPS");
1046                 /*
1047                  * Clear any possible EAPOL authenticator state to support
1048                  * reassociation change from WPS to PSK.
1049                  */
1050                 ieee802_1x_free_station(sta);
1051                 return;
1052         }
1053
1054         key_mgmt = wpa_auth_sta_key_mgmt(sta->wpa_sm);
1055         if (key_mgmt != -1 && wpa_key_mgmt_wpa_psk(key_mgmt)) {
1056                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Ignore STA - using PSK");
1057                 /*
1058                  * Clear any possible EAPOL authenticator state to support
1059                  * reassociation change from WPA-EAP to PSK.
1060                  */
1061                 ieee802_1x_free_station(sta);
1062                 return;
1063         }
1064
1065         if (sta->eapol_sm == NULL) {
1066                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1067                                HOSTAPD_LEVEL_DEBUG, "start authentication");
1068                 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
1069                 if (sta->eapol_sm == NULL) {
1070                         hostapd_logger(hapd, sta->addr,
1071                                        HOSTAPD_MODULE_IEEE8021X,
1072                                        HOSTAPD_LEVEL_INFO,
1073                                        "failed to allocate state machine");
1074                         return;
1075                 }
1076                 reassoc = 0;
1077         }
1078
1079 #ifdef CONFIG_WPS
1080         sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
1081         if (!hapd->conf->ieee802_1x && hapd->conf->wps_state &&
1082             !(sta->flags & WLAN_STA_WPS2)) {
1083                 /*
1084                  * Delay EAPOL frame transmission until a possible WPS STA
1085                  * initiates the handshake with EAPOL-Start. Only allow the
1086                  * wait to be skipped if the STA is known to support WPS 2.0.
1087                  */
1088                 wpa_printf(MSG_DEBUG, "WPS: Do not start EAPOL until "
1089                            "EAPOL-Start is received");
1090                 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
1091         }
1092 #endif /* CONFIG_WPS */
1093
1094         sta->eapol_sm->eap_if->portEnabled = TRUE;
1095
1096 #ifdef CONFIG_IEEE80211R
1097         if (sta->auth_alg == WLAN_AUTH_FT) {
1098                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1099                                HOSTAPD_LEVEL_DEBUG,
1100                                "PMK from FT - skip IEEE 802.1X/EAP");
1101                 /* Setup EAPOL state machines to already authenticated state
1102                  * because of existing FT information from R0KH. */
1103                 sta->eapol_sm->keyRun = TRUE;
1104                 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
1105                 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
1106                 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
1107                 sta->eapol_sm->authSuccess = TRUE;
1108                 sta->eapol_sm->authFail = FALSE;
1109                 if (sta->eapol_sm->eap)
1110                         eap_sm_notify_cached(sta->eapol_sm->eap);
1111                 /* TODO: get vlan_id from R0KH using RRB message */
1112                 return;
1113         }
1114 #endif /* CONFIG_IEEE80211R */
1115
1116         pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
1117         if (pmksa) {
1118                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1119                                HOSTAPD_LEVEL_DEBUG,
1120                                "PMK from PMKSA cache - skip IEEE 802.1X/EAP");
1121                 /* Setup EAPOL state machines to already authenticated state
1122                  * because of existing PMKSA information in the cache. */
1123                 sta->eapol_sm->keyRun = TRUE;
1124                 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
1125                 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
1126                 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
1127                 sta->eapol_sm->authSuccess = TRUE;
1128                 sta->eapol_sm->authFail = FALSE;
1129                 if (sta->eapol_sm->eap)
1130                         eap_sm_notify_cached(sta->eapol_sm->eap);
1131                 pmksa_cache_to_eapol_data(pmksa, sta->eapol_sm);
1132                 ap_sta_bind_vlan(hapd, sta);
1133         } else {
1134                 if (reassoc) {
1135                         /*
1136                          * Force EAPOL state machines to start
1137                          * re-authentication without having to wait for the
1138                          * Supplicant to send EAPOL-Start.
1139                          */
1140                         sta->eapol_sm->reAuthenticate = TRUE;
1141                 }
1142                 eapol_auth_step(sta->eapol_sm);
1143         }
1144 }
1145
1146
1147 void ieee802_1x_free_station(struct sta_info *sta)
1148 {
1149         struct eapol_state_machine *sm = sta->eapol_sm;
1150
1151         if (sm == NULL)
1152                 return;
1153
1154         sta->eapol_sm = NULL;
1155
1156 #ifndef CONFIG_NO_RADIUS
1157         radius_msg_free(sm->last_recv_radius);
1158         radius_free_class(&sm->radius_class);
1159         wpabuf_free(sm->radius_cui);
1160 #endif /* CONFIG_NO_RADIUS */
1161
1162         os_free(sm->identity);
1163         eapol_auth_free(sm);
1164 }
1165
1166
1167 #ifndef CONFIG_NO_RADIUS
1168 static void ieee802_1x_decapsulate_radius(struct hostapd_data *hapd,
1169                                           struct sta_info *sta)
1170 {
1171         struct wpabuf *eap;
1172         const struct eap_hdr *hdr;
1173         int eap_type = -1;
1174         char buf[64];
1175         struct radius_msg *msg;
1176         struct eapol_state_machine *sm = sta->eapol_sm;
1177
1178         if (sm == NULL || sm->last_recv_radius == NULL) {
1179                 if (sm)
1180                         sm->eap_if->aaaEapNoReq = TRUE;
1181                 return;
1182         }
1183
1184         msg = sm->last_recv_radius;
1185
1186         eap = radius_msg_get_eap(msg);
1187         if (eap == NULL) {
1188                 /* RFC 3579, Chap. 2.6.3:
1189                  * RADIUS server SHOULD NOT send Access-Reject/no EAP-Message
1190                  * attribute */
1191                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1192                                HOSTAPD_LEVEL_WARNING, "could not extract "
1193                                "EAP-Message from RADIUS message");
1194                 sm->eap_if->aaaEapNoReq = TRUE;
1195                 return;
1196         }
1197
1198         if (wpabuf_len(eap) < sizeof(*hdr)) {
1199                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1200                                HOSTAPD_LEVEL_WARNING, "too short EAP packet "
1201                                "received from authentication server");
1202                 wpabuf_free(eap);
1203                 sm->eap_if->aaaEapNoReq = TRUE;
1204                 return;
1205         }
1206
1207         if (wpabuf_len(eap) > sizeof(*hdr))
1208                 eap_type = (wpabuf_head_u8(eap))[sizeof(*hdr)];
1209
1210         hdr = wpabuf_head(eap);
1211         switch (hdr->code) {
1212         case EAP_CODE_REQUEST:
1213                 if (eap_type >= 0)
1214                         sm->eap_type_authsrv = eap_type;
1215                 os_snprintf(buf, sizeof(buf), "EAP-Request-%s (%d)",
1216                             eap_server_get_name(0, eap_type), eap_type);
1217                 break;
1218         case EAP_CODE_RESPONSE:
1219                 os_snprintf(buf, sizeof(buf), "EAP Response-%s (%d)",
1220                             eap_server_get_name(0, eap_type), eap_type);
1221                 break;
1222         case EAP_CODE_SUCCESS:
1223                 os_strlcpy(buf, "EAP Success", sizeof(buf));
1224                 break;
1225         case EAP_CODE_FAILURE:
1226                 os_strlcpy(buf, "EAP Failure", sizeof(buf));
1227                 break;
1228         default:
1229                 os_strlcpy(buf, "unknown EAP code", sizeof(buf));
1230                 break;
1231         }
1232         buf[sizeof(buf) - 1] = '\0';
1233         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1234                        HOSTAPD_LEVEL_DEBUG, "decapsulated EAP packet (code=%d "
1235                        "id=%d len=%d) from RADIUS server: %s",
1236                        hdr->code, hdr->identifier, be_to_host16(hdr->length),
1237                        buf);
1238         sm->eap_if->aaaEapReq = TRUE;
1239
1240         wpabuf_free(sm->eap_if->aaaEapReqData);
1241         sm->eap_if->aaaEapReqData = eap;
1242 }
1243
1244
1245 static void ieee802_1x_get_keys(struct hostapd_data *hapd,
1246                                 struct sta_info *sta, struct radius_msg *msg,
1247                                 struct radius_msg *req,
1248                                 const u8 *shared_secret,
1249                                 size_t shared_secret_len)
1250 {
1251         struct radius_ms_mppe_keys *keys;
1252         struct eapol_state_machine *sm = sta->eapol_sm;
1253         if (sm == NULL)
1254                 return;
1255
1256         keys = radius_msg_get_ms_keys(msg, req, shared_secret,
1257                                       shared_secret_len);
1258
1259         if (keys && keys->send && keys->recv) {
1260                 size_t len = keys->send_len + keys->recv_len;
1261                 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Send-Key",
1262                                 keys->send, keys->send_len);
1263                 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Recv-Key",
1264                                 keys->recv, keys->recv_len);
1265
1266                 os_free(sm->eap_if->aaaEapKeyData);
1267                 sm->eap_if->aaaEapKeyData = os_malloc(len);
1268                 if (sm->eap_if->aaaEapKeyData) {
1269                         os_memcpy(sm->eap_if->aaaEapKeyData, keys->recv,
1270                                   keys->recv_len);
1271                         os_memcpy(sm->eap_if->aaaEapKeyData + keys->recv_len,
1272                                   keys->send, keys->send_len);
1273                         sm->eap_if->aaaEapKeyDataLen = len;
1274                         sm->eap_if->aaaEapKeyAvailable = TRUE;
1275                 }
1276         } else {
1277                 wpa_printf(MSG_DEBUG,
1278                            "MS-MPPE: 1x_get_keys, could not get keys: %p  send: %p  recv: %p",
1279                            keys, keys ? keys->send : NULL,
1280                            keys ? keys->recv : NULL);
1281         }
1282
1283         if (keys) {
1284                 os_free(keys->send);
1285                 os_free(keys->recv);
1286                 os_free(keys);
1287         }
1288 }
1289
1290
1291 static void ieee802_1x_store_radius_class(struct hostapd_data *hapd,
1292                                           struct sta_info *sta,
1293                                           struct radius_msg *msg)
1294 {
1295         u8 *attr_class;
1296         size_t class_len;
1297         struct eapol_state_machine *sm = sta->eapol_sm;
1298         int count, i;
1299         struct radius_attr_data *nclass;
1300         size_t nclass_count;
1301
1302         if (!hapd->conf->radius->acct_server || hapd->radius == NULL ||
1303             sm == NULL)
1304                 return;
1305
1306         radius_free_class(&sm->radius_class);
1307         count = radius_msg_count_attr(msg, RADIUS_ATTR_CLASS, 1);
1308         if (count <= 0)
1309                 return;
1310
1311         nclass = os_calloc(count, sizeof(struct radius_attr_data));
1312         if (nclass == NULL)
1313                 return;
1314
1315         nclass_count = 0;
1316
1317         attr_class = NULL;
1318         for (i = 0; i < count; i++) {
1319                 do {
1320                         if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CLASS,
1321                                                     &attr_class, &class_len,
1322                                                     attr_class) < 0) {
1323                                 i = count;
1324                                 break;
1325                         }
1326                 } while (class_len < 1);
1327
1328                 nclass[nclass_count].data = os_malloc(class_len);
1329                 if (nclass[nclass_count].data == NULL)
1330                         break;
1331
1332                 os_memcpy(nclass[nclass_count].data, attr_class, class_len);
1333                 nclass[nclass_count].len = class_len;
1334                 nclass_count++;
1335         }
1336
1337         sm->radius_class.attr = nclass;
1338         sm->radius_class.count = nclass_count;
1339         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Stored %lu RADIUS Class "
1340                    "attributes for " MACSTR,
1341                    (unsigned long) sm->radius_class.count,
1342                    MAC2STR(sta->addr));
1343 }
1344
1345
1346 /* Update sta->identity based on User-Name attribute in Access-Accept */
1347 static void ieee802_1x_update_sta_identity(struct hostapd_data *hapd,
1348                                            struct sta_info *sta,
1349                                            struct radius_msg *msg)
1350 {
1351         u8 *buf, *identity;
1352         size_t len;
1353         struct eapol_state_machine *sm = sta->eapol_sm;
1354
1355         if (sm == NULL)
1356                 return;
1357
1358         if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_USER_NAME, &buf, &len,
1359                                     NULL) < 0)
1360                 return;
1361
1362         identity = (u8 *) dup_binstr(buf, len);
1363         if (identity == NULL)
1364                 return;
1365
1366         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1367                        HOSTAPD_LEVEL_DEBUG, "old identity '%s' updated with "
1368                        "User-Name from Access-Accept '%s'",
1369                        sm->identity ? (char *) sm->identity : "N/A",
1370                        (char *) identity);
1371
1372         os_free(sm->identity);
1373         sm->identity = identity;
1374         sm->identity_len = len;
1375 }
1376
1377
1378 /* Update CUI based on Chargeable-User-Identity attribute in Access-Accept */
1379 static void ieee802_1x_update_sta_cui(struct hostapd_data *hapd,
1380                                       struct sta_info *sta,
1381                                       struct radius_msg *msg)
1382 {
1383         struct eapol_state_machine *sm = sta->eapol_sm;
1384         struct wpabuf *cui;
1385         u8 *buf;
1386         size_t len;
1387
1388         if (sm == NULL)
1389                 return;
1390
1391         if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CHARGEABLE_USER_IDENTITY,
1392                                     &buf, &len, NULL) < 0)
1393                 return;
1394
1395         cui = wpabuf_alloc_copy(buf, len);
1396         if (cui == NULL)
1397                 return;
1398
1399         wpabuf_free(sm->radius_cui);
1400         sm->radius_cui = cui;
1401 }
1402
1403
1404 #ifdef CONFIG_HS20
1405
1406 static void ieee802_1x_hs20_sub_rem(struct sta_info *sta, u8 *pos, size_t len)
1407 {
1408         sta->remediation = 1;
1409         os_free(sta->remediation_url);
1410         if (len > 2) {
1411                 sta->remediation_url = os_malloc(len);
1412                 if (!sta->remediation_url)
1413                         return;
1414                 sta->remediation_method = pos[0];
1415                 os_memcpy(sta->remediation_url, pos + 1, len - 1);
1416                 sta->remediation_url[len - 1] = '\0';
1417                 wpa_printf(MSG_DEBUG, "HS 2.0: Subscription remediation needed "
1418                            "for " MACSTR " - server method %u URL %s",
1419                            MAC2STR(sta->addr), sta->remediation_method,
1420                            sta->remediation_url);
1421         } else {
1422                 sta->remediation_url = NULL;
1423                 wpa_printf(MSG_DEBUG, "HS 2.0: Subscription remediation needed "
1424                            "for " MACSTR, MAC2STR(sta->addr));
1425         }
1426         /* TODO: assign the STA into remediation VLAN or add filtering */
1427 }
1428
1429
1430 static void ieee802_1x_hs20_deauth_req(struct hostapd_data *hapd,
1431                                        struct sta_info *sta, u8 *pos,
1432                                        size_t len)
1433 {
1434         if (len < 3)
1435                 return; /* Malformed information */
1436         sta->hs20_deauth_requested = 1;
1437         wpa_printf(MSG_DEBUG, "HS 2.0: Deauthentication request - Code %u  "
1438                    "Re-auth Delay %u",
1439                    *pos, WPA_GET_LE16(pos + 1));
1440         wpabuf_free(sta->hs20_deauth_req);
1441         sta->hs20_deauth_req = wpabuf_alloc(len + 1);
1442         if (sta->hs20_deauth_req) {
1443                 wpabuf_put_data(sta->hs20_deauth_req, pos, 3);
1444                 wpabuf_put_u8(sta->hs20_deauth_req, len - 3);
1445                 wpabuf_put_data(sta->hs20_deauth_req, pos + 3, len - 3);
1446         }
1447         ap_sta_session_timeout(hapd, sta, hapd->conf->hs20_deauth_req_timeout);
1448 }
1449
1450
1451 static void ieee802_1x_hs20_session_info(struct hostapd_data *hapd,
1452                                          struct sta_info *sta, u8 *pos,
1453                                          size_t len, int session_timeout)
1454 {
1455         unsigned int swt;
1456         int warning_time, beacon_int;
1457
1458         if (len < 1)
1459                 return; /* Malformed information */
1460         os_free(sta->hs20_session_info_url);
1461         sta->hs20_session_info_url = os_malloc(len);
1462         if (sta->hs20_session_info_url == NULL)
1463                 return;
1464         swt = pos[0];
1465         os_memcpy(sta->hs20_session_info_url, pos + 1, len - 1);
1466         sta->hs20_session_info_url[len - 1] = '\0';
1467         wpa_printf(MSG_DEBUG, "HS 2.0: Session Information URL='%s' SWT=%u "
1468                    "(session_timeout=%d)",
1469                    sta->hs20_session_info_url, swt, session_timeout);
1470         if (session_timeout < 0) {
1471                 wpa_printf(MSG_DEBUG, "HS 2.0: No Session-Timeout set - ignore session info URL");
1472                 return;
1473         }
1474         if (swt == 255)
1475                 swt = 1; /* Use one minute as the AP selected value */
1476
1477         if ((unsigned int) session_timeout < swt * 60)
1478                 warning_time = 0;
1479         else
1480                 warning_time = session_timeout - swt * 60;
1481
1482         beacon_int = hapd->iconf->beacon_int;
1483         if (beacon_int < 1)
1484                 beacon_int = 100; /* best guess */
1485         sta->hs20_disassoc_timer = swt * 60 * 1000 / beacon_int * 125 / 128;
1486         if (sta->hs20_disassoc_timer > 65535)
1487                 sta->hs20_disassoc_timer = 65535;
1488
1489         ap_sta_session_warning_timeout(hapd, sta, warning_time);
1490 }
1491
1492 #endif /* CONFIG_HS20 */
1493
1494
1495 static void ieee802_1x_check_hs20(struct hostapd_data *hapd,
1496                                   struct sta_info *sta,
1497                                   struct radius_msg *msg,
1498                                   int session_timeout)
1499 {
1500 #ifdef CONFIG_HS20
1501         u8 *buf, *pos, *end, type, sublen;
1502         size_t len;
1503
1504         buf = NULL;
1505         sta->remediation = 0;
1506         sta->hs20_deauth_requested = 0;
1507
1508         for (;;) {
1509                 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_VENDOR_SPECIFIC,
1510                                             &buf, &len, buf) < 0)
1511                         break;
1512                 if (len < 6)
1513                         continue;
1514                 pos = buf;
1515                 end = buf + len;
1516                 if (WPA_GET_BE32(pos) != RADIUS_VENDOR_ID_WFA)
1517                         continue;
1518                 pos += 4;
1519
1520                 type = *pos++;
1521                 sublen = *pos++;
1522                 if (sublen < 2)
1523                         continue; /* invalid length */
1524                 sublen -= 2; /* skip header */
1525                 if (pos + sublen > end)
1526                         continue; /* invalid WFA VSA */
1527
1528                 switch (type) {
1529                 case RADIUS_VENDOR_ATTR_WFA_HS20_SUBSCR_REMEDIATION:
1530                         ieee802_1x_hs20_sub_rem(sta, pos, sublen);
1531                         break;
1532                 case RADIUS_VENDOR_ATTR_WFA_HS20_DEAUTH_REQ:
1533                         ieee802_1x_hs20_deauth_req(hapd, sta, pos, sublen);
1534                         break;
1535                 case RADIUS_VENDOR_ATTR_WFA_HS20_SESSION_INFO_URL:
1536                         ieee802_1x_hs20_session_info(hapd, sta, pos, sublen,
1537                                                      session_timeout);
1538                         break;
1539                 }
1540         }
1541 #endif /* CONFIG_HS20 */
1542 }
1543
1544
1545 struct sta_id_search {
1546         u8 identifier;
1547         struct eapol_state_machine *sm;
1548 };
1549
1550
1551 static int ieee802_1x_select_radius_identifier(struct hostapd_data *hapd,
1552                                                struct sta_info *sta,
1553                                                void *ctx)
1554 {
1555         struct sta_id_search *id_search = ctx;
1556         struct eapol_state_machine *sm = sta->eapol_sm;
1557
1558         if (sm && sm->radius_identifier >= 0 &&
1559             sm->radius_identifier == id_search->identifier) {
1560                 id_search->sm = sm;
1561                 return 1;
1562         }
1563         return 0;
1564 }
1565
1566
1567 static struct eapol_state_machine *
1568 ieee802_1x_search_radius_identifier(struct hostapd_data *hapd, u8 identifier)
1569 {
1570         struct sta_id_search id_search;
1571         id_search.identifier = identifier;
1572         id_search.sm = NULL;
1573         ap_for_each_sta(hapd, ieee802_1x_select_radius_identifier, &id_search);
1574         return id_search.sm;
1575 }
1576
1577
1578 /**
1579  * ieee802_1x_receive_auth - Process RADIUS frames from Authentication Server
1580  * @msg: RADIUS response message
1581  * @req: RADIUS request message
1582  * @shared_secret: RADIUS shared secret
1583  * @shared_secret_len: Length of shared_secret in octets
1584  * @data: Context data (struct hostapd_data *)
1585  * Returns: Processing status
1586  */
1587 static RadiusRxResult
1588 ieee802_1x_receive_auth(struct radius_msg *msg, struct radius_msg *req,
1589                         const u8 *shared_secret, size_t shared_secret_len,
1590                         void *data)
1591 {
1592         struct hostapd_data *hapd = data;
1593         struct sta_info *sta;
1594         u32 session_timeout = 0, termination_action, acct_interim_interval;
1595         int session_timeout_set, vlan_id = 0;
1596         struct eapol_state_machine *sm;
1597         int override_eapReq = 0;
1598         struct radius_hdr *hdr = radius_msg_get_hdr(msg);
1599
1600         sm = ieee802_1x_search_radius_identifier(hapd, hdr->identifier);
1601         if (sm == NULL) {
1602                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Could not find matching "
1603                            "station for this RADIUS message");
1604                 return RADIUS_RX_UNKNOWN;
1605         }
1606         sta = sm->sta;
1607
1608         /* RFC 2869, Ch. 5.13: valid Message-Authenticator attribute MUST be
1609          * present when packet contains an EAP-Message attribute */
1610         if (hdr->code == RADIUS_CODE_ACCESS_REJECT &&
1611             radius_msg_get_attr(msg, RADIUS_ATTR_MESSAGE_AUTHENTICATOR, NULL,
1612                                 0) < 0 &&
1613             radius_msg_get_attr(msg, RADIUS_ATTR_EAP_MESSAGE, NULL, 0) < 0) {
1614                 wpa_printf(MSG_DEBUG, "Allowing RADIUS Access-Reject without "
1615                            "Message-Authenticator since it does not include "
1616                            "EAP-Message");
1617         } else if (radius_msg_verify(msg, shared_secret, shared_secret_len,
1618                                      req, 1)) {
1619                 wpa_printf(MSG_INFO, "Incoming RADIUS packet did not have correct Message-Authenticator - dropped");
1620                 return RADIUS_RX_INVALID_AUTHENTICATOR;
1621         }
1622
1623         if (hdr->code != RADIUS_CODE_ACCESS_ACCEPT &&
1624             hdr->code != RADIUS_CODE_ACCESS_REJECT &&
1625             hdr->code != RADIUS_CODE_ACCESS_CHALLENGE) {
1626                 wpa_printf(MSG_INFO, "Unknown RADIUS message code");
1627                 return RADIUS_RX_UNKNOWN;
1628         }
1629
1630         sm->radius_identifier = -1;
1631         wpa_printf(MSG_DEBUG, "RADIUS packet matching with station " MACSTR,
1632                    MAC2STR(sta->addr));
1633
1634         radius_msg_free(sm->last_recv_radius);
1635         sm->last_recv_radius = msg;
1636
1637         session_timeout_set =
1638                 !radius_msg_get_attr_int32(msg, RADIUS_ATTR_SESSION_TIMEOUT,
1639                                            &session_timeout);
1640         if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_TERMINATION_ACTION,
1641                                       &termination_action))
1642                 termination_action = RADIUS_TERMINATION_ACTION_DEFAULT;
1643
1644         if (hapd->conf->acct_interim_interval == 0 &&
1645             hdr->code == RADIUS_CODE_ACCESS_ACCEPT &&
1646             radius_msg_get_attr_int32(msg, RADIUS_ATTR_ACCT_INTERIM_INTERVAL,
1647                                       &acct_interim_interval) == 0) {
1648                 if (acct_interim_interval < 60) {
1649                         hostapd_logger(hapd, sta->addr,
1650                                        HOSTAPD_MODULE_IEEE8021X,
1651                                        HOSTAPD_LEVEL_INFO,
1652                                        "ignored too small "
1653                                        "Acct-Interim-Interval %d",
1654                                        acct_interim_interval);
1655                 } else
1656                         sta->acct_interim_interval = acct_interim_interval;
1657         }
1658
1659
1660         switch (hdr->code) {
1661         case RADIUS_CODE_ACCESS_ACCEPT:
1662                 if (hapd->conf->ssid.dynamic_vlan == DYNAMIC_VLAN_DISABLED)
1663                         vlan_id = 0;
1664 #ifndef CONFIG_NO_VLAN
1665                 else
1666                         vlan_id = radius_msg_get_vlanid(msg);
1667                 if (vlan_id > 0 &&
1668                     hostapd_vlan_id_valid(hapd->conf->vlan, vlan_id)) {
1669                         hostapd_logger(hapd, sta->addr,
1670                                        HOSTAPD_MODULE_RADIUS,
1671                                        HOSTAPD_LEVEL_INFO,
1672                                        "VLAN ID %d", vlan_id);
1673                 } else if (vlan_id > 0) {
1674                         sta->eapol_sm->authFail = TRUE;
1675                         hostapd_logger(hapd, sta->addr,
1676                                        HOSTAPD_MODULE_RADIUS,
1677                                        HOSTAPD_LEVEL_INFO,
1678                                        "Invalid VLAN ID %d received from RADIUS server",
1679                                        vlan_id);
1680                         break;
1681                 } else if (hapd->conf->ssid.dynamic_vlan ==
1682                            DYNAMIC_VLAN_REQUIRED) {
1683                         sta->eapol_sm->authFail = TRUE;
1684                         hostapd_logger(hapd, sta->addr,
1685                                        HOSTAPD_MODULE_IEEE8021X,
1686                                        HOSTAPD_LEVEL_INFO, "authentication "
1687                                        "server did not include required VLAN "
1688                                        "ID in Access-Accept");
1689                         break;
1690                 }
1691 #endif /* CONFIG_NO_VLAN */
1692
1693                 sta->vlan_id = vlan_id;
1694                 if ((sta->flags & WLAN_STA_ASSOC) &&
1695                     ap_sta_bind_vlan(hapd, sta) < 0)
1696                         break;
1697
1698                 sta->session_timeout_set = !!session_timeout_set;
1699                 sta->session_timeout = session_timeout;
1700
1701                 /* RFC 3580, Ch. 3.17 */
1702                 if (session_timeout_set && termination_action ==
1703                     RADIUS_TERMINATION_ACTION_RADIUS_REQUEST) {
1704                         sm->reAuthPeriod = session_timeout;
1705                 } else if (session_timeout_set)
1706                         ap_sta_session_timeout(hapd, sta, session_timeout);
1707
1708                 sm->eap_if->aaaSuccess = TRUE;
1709                 override_eapReq = 1;
1710                 ieee802_1x_get_keys(hapd, sta, msg, req, shared_secret,
1711                                     shared_secret_len);
1712                 ieee802_1x_store_radius_class(hapd, sta, msg);
1713                 ieee802_1x_update_sta_identity(hapd, sta, msg);
1714                 ieee802_1x_update_sta_cui(hapd, sta, msg);
1715                 ieee802_1x_check_hs20(hapd, sta, msg,
1716                                       session_timeout_set ?
1717                                       (int) session_timeout : -1);
1718                 if (sm->eap_if->eapKeyAvailable && !sta->remediation &&
1719                     !sta->hs20_deauth_requested &&
1720                     wpa_auth_pmksa_add(sta->wpa_sm, sm->eapol_key_crypt,
1721                                        session_timeout_set ?
1722                                        (int) session_timeout : -1, sm) == 0) {
1723                         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
1724                                        HOSTAPD_LEVEL_DEBUG,
1725                                        "Added PMKSA cache entry");
1726                 }
1727                 break;
1728         case RADIUS_CODE_ACCESS_REJECT:
1729                 sm->eap_if->aaaFail = TRUE;
1730                 override_eapReq = 1;
1731                 break;
1732         case RADIUS_CODE_ACCESS_CHALLENGE:
1733                 sm->eap_if->aaaEapReq = TRUE;
1734                 if (session_timeout_set) {
1735                         /* RFC 2869, Ch. 2.3.2; RFC 3580, Ch. 3.17 */
1736                         sm->eap_if->aaaMethodTimeout = session_timeout;
1737                         hostapd_logger(hapd, sm->addr,
1738                                        HOSTAPD_MODULE_IEEE8021X,
1739                                        HOSTAPD_LEVEL_DEBUG,
1740                                        "using EAP timeout of %d seconds (from "
1741                                        "RADIUS)",
1742                                        sm->eap_if->aaaMethodTimeout);
1743                 } else {
1744                         /*
1745                          * Use dynamic retransmission behavior per EAP
1746                          * specification.
1747                          */
1748                         sm->eap_if->aaaMethodTimeout = 0;
1749                 }
1750                 break;
1751         }
1752
1753         ieee802_1x_decapsulate_radius(hapd, sta);
1754         if (override_eapReq)
1755                 sm->eap_if->aaaEapReq = FALSE;
1756
1757         eapol_auth_step(sm);
1758
1759         return RADIUS_RX_QUEUED;
1760 }
1761 #endif /* CONFIG_NO_RADIUS */
1762
1763
1764 void ieee802_1x_abort_auth(struct hostapd_data *hapd, struct sta_info *sta)
1765 {
1766         struct eapol_state_machine *sm = sta->eapol_sm;
1767         if (sm == NULL)
1768                 return;
1769
1770         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1771                        HOSTAPD_LEVEL_DEBUG, "aborting authentication");
1772
1773 #ifndef CONFIG_NO_RADIUS
1774         radius_msg_free(sm->last_recv_radius);
1775         sm->last_recv_radius = NULL;
1776 #endif /* CONFIG_NO_RADIUS */
1777
1778         if (sm->eap_if->eapTimeout) {
1779                 /*
1780                  * Disconnect the STA since it did not reply to the last EAP
1781                  * request and we cannot continue EAP processing (EAP-Failure
1782                  * could only be sent if the EAP peer actually replied).
1783                  */
1784                 wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "EAP Timeout, STA " MACSTR,
1785                         MAC2STR(sta->addr));
1786
1787                 sm->eap_if->portEnabled = FALSE;
1788                 ap_sta_disconnect(hapd, sta, sta->addr,
1789                                   WLAN_REASON_PREV_AUTH_NOT_VALID);
1790         }
1791 }
1792
1793
1794 static int ieee802_1x_rekey_broadcast(struct hostapd_data *hapd)
1795 {
1796         struct eapol_authenticator *eapol = hapd->eapol_auth;
1797
1798         if (hapd->conf->default_wep_key_len < 1)
1799                 return 0;
1800
1801         os_free(eapol->default_wep_key);
1802         eapol->default_wep_key = os_malloc(hapd->conf->default_wep_key_len);
1803         if (eapol->default_wep_key == NULL ||
1804             random_get_bytes(eapol->default_wep_key,
1805                              hapd->conf->default_wep_key_len)) {
1806                 wpa_printf(MSG_INFO, "Could not generate random WEP key");
1807                 os_free(eapol->default_wep_key);
1808                 eapol->default_wep_key = NULL;
1809                 return -1;
1810         }
1811
1812         wpa_hexdump_key(MSG_DEBUG, "IEEE 802.1X: New default WEP key",
1813                         eapol->default_wep_key,
1814                         hapd->conf->default_wep_key_len);
1815
1816         return 0;
1817 }
1818
1819
1820 static int ieee802_1x_sta_key_available(struct hostapd_data *hapd,
1821                                         struct sta_info *sta, void *ctx)
1822 {
1823         if (sta->eapol_sm) {
1824                 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
1825                 eapol_auth_step(sta->eapol_sm);
1826         }
1827         return 0;
1828 }
1829
1830
1831 static void ieee802_1x_rekey(void *eloop_ctx, void *timeout_ctx)
1832 {
1833         struct hostapd_data *hapd = eloop_ctx;
1834         struct eapol_authenticator *eapol = hapd->eapol_auth;
1835
1836         if (eapol->default_wep_key_idx >= 3)
1837                 eapol->default_wep_key_idx =
1838                         hapd->conf->individual_wep_key_len > 0 ? 1 : 0;
1839         else
1840                 eapol->default_wep_key_idx++;
1841
1842         wpa_printf(MSG_DEBUG, "IEEE 802.1X: New default WEP key index %d",
1843                    eapol->default_wep_key_idx);
1844
1845         if (ieee802_1x_rekey_broadcast(hapd)) {
1846                 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1847                                HOSTAPD_LEVEL_WARNING, "failed to generate a "
1848                                "new broadcast key");
1849                 os_free(eapol->default_wep_key);
1850                 eapol->default_wep_key = NULL;
1851                 return;
1852         }
1853
1854         /* TODO: Could setup key for RX here, but change default TX keyid only
1855          * after new broadcast key has been sent to all stations. */
1856         if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
1857                                 broadcast_ether_addr,
1858                                 eapol->default_wep_key_idx, 1, NULL, 0,
1859                                 eapol->default_wep_key,
1860                                 hapd->conf->default_wep_key_len)) {
1861                 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1862                                HOSTAPD_LEVEL_WARNING, "failed to configure a "
1863                                "new broadcast key");
1864                 os_free(eapol->default_wep_key);
1865                 eapol->default_wep_key = NULL;
1866                 return;
1867         }
1868
1869         ap_for_each_sta(hapd, ieee802_1x_sta_key_available, NULL);
1870
1871         if (hapd->conf->wep_rekeying_period > 0) {
1872                 eloop_register_timeout(hapd->conf->wep_rekeying_period, 0,
1873                                        ieee802_1x_rekey, hapd, NULL);
1874         }
1875 }
1876
1877
1878 static void ieee802_1x_eapol_send(void *ctx, void *sta_ctx, u8 type,
1879                                   const u8 *data, size_t datalen)
1880 {
1881 #ifdef CONFIG_WPS
1882         struct sta_info *sta = sta_ctx;
1883
1884         if ((sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) ==
1885             WLAN_STA_MAYBE_WPS) {
1886                 const u8 *identity;
1887                 size_t identity_len;
1888                 struct eapol_state_machine *sm = sta->eapol_sm;
1889
1890                 identity = eap_get_identity(sm->eap, &identity_len);
1891                 if (identity &&
1892                     ((identity_len == WSC_ID_ENROLLEE_LEN &&
1893                       os_memcmp(identity, WSC_ID_ENROLLEE,
1894                                 WSC_ID_ENROLLEE_LEN) == 0) ||
1895                      (identity_len == WSC_ID_REGISTRAR_LEN &&
1896                       os_memcmp(identity, WSC_ID_REGISTRAR,
1897                                 WSC_ID_REGISTRAR_LEN) == 0))) {
1898                         wpa_printf(MSG_DEBUG, "WPS: WLAN_STA_MAYBE_WPS -> "
1899                                    "WLAN_STA_WPS");
1900                         sta->flags |= WLAN_STA_WPS;
1901                 }
1902         }
1903 #endif /* CONFIG_WPS */
1904
1905         ieee802_1x_send(ctx, sta_ctx, type, data, datalen);
1906 }
1907
1908
1909 static void ieee802_1x_aaa_send(void *ctx, void *sta_ctx,
1910                                 const u8 *data, size_t datalen)
1911 {
1912 #ifndef CONFIG_NO_RADIUS
1913         struct hostapd_data *hapd = ctx;
1914         struct sta_info *sta = sta_ctx;
1915
1916         ieee802_1x_encapsulate_radius(hapd, sta, data, datalen);
1917 #endif /* CONFIG_NO_RADIUS */
1918 }
1919
1920
1921 static void _ieee802_1x_finished(void *ctx, void *sta_ctx, int success,
1922                                  int preauth, int remediation)
1923 {
1924         struct hostapd_data *hapd = ctx;
1925         struct sta_info *sta = sta_ctx;
1926         if (preauth)
1927                 rsn_preauth_finished(hapd, sta, success);
1928         else
1929                 ieee802_1x_finished(hapd, sta, success, remediation);
1930 }
1931
1932
1933 static int ieee802_1x_get_eap_user(void *ctx, const u8 *identity,
1934                                    size_t identity_len, int phase2,
1935                                    struct eap_user *user)
1936 {
1937         struct hostapd_data *hapd = ctx;
1938         const struct hostapd_eap_user *eap_user;
1939         int i;
1940         int rv = -1;
1941
1942         eap_user = hostapd_get_eap_user(hapd, identity, identity_len, phase2);
1943         if (eap_user == NULL)
1944                 goto out;
1945
1946         os_memset(user, 0, sizeof(*user));
1947         user->phase2 = phase2;
1948         for (i = 0; i < EAP_MAX_METHODS; i++) {
1949                 user->methods[i].vendor = eap_user->methods[i].vendor;
1950                 user->methods[i].method = eap_user->methods[i].method;
1951         }
1952
1953         if (eap_user->password) {
1954                 user->password = os_malloc(eap_user->password_len);
1955                 if (user->password == NULL)
1956                         goto out;
1957                 os_memcpy(user->password, eap_user->password,
1958                           eap_user->password_len);
1959                 user->password_len = eap_user->password_len;
1960                 user->password_hash = eap_user->password_hash;
1961         }
1962         user->force_version = eap_user->force_version;
1963         user->macacl = eap_user->macacl;
1964         user->ttls_auth = eap_user->ttls_auth;
1965         user->remediation = eap_user->remediation;
1966         rv = 0;
1967
1968 out:
1969         if (rv)
1970                 wpa_printf(MSG_DEBUG, "%s: Failed to find user", __func__);
1971
1972         return rv;
1973 }
1974
1975
1976 static int ieee802_1x_sta_entry_alive(void *ctx, const u8 *addr)
1977 {
1978         struct hostapd_data *hapd = ctx;
1979         struct sta_info *sta;
1980         sta = ap_get_sta(hapd, addr);
1981         if (sta == NULL || sta->eapol_sm == NULL)
1982                 return 0;
1983         return 1;
1984 }
1985
1986
1987 static void ieee802_1x_logger(void *ctx, const u8 *addr,
1988                               eapol_logger_level level, const char *txt)
1989 {
1990 #ifndef CONFIG_NO_HOSTAPD_LOGGER
1991         struct hostapd_data *hapd = ctx;
1992         int hlevel;
1993
1994         switch (level) {
1995         case EAPOL_LOGGER_WARNING:
1996                 hlevel = HOSTAPD_LEVEL_WARNING;
1997                 break;
1998         case EAPOL_LOGGER_INFO:
1999                 hlevel = HOSTAPD_LEVEL_INFO;
2000                 break;
2001         case EAPOL_LOGGER_DEBUG:
2002         default:
2003                 hlevel = HOSTAPD_LEVEL_DEBUG;
2004                 break;
2005         }
2006
2007         hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE8021X, hlevel, "%s",
2008                        txt);
2009 #endif /* CONFIG_NO_HOSTAPD_LOGGER */
2010 }
2011
2012
2013 static void ieee802_1x_set_port_authorized(void *ctx, void *sta_ctx,
2014                                            int authorized)
2015 {
2016         struct hostapd_data *hapd = ctx;
2017         struct sta_info *sta = sta_ctx;
2018         ieee802_1x_set_sta_authorized(hapd, sta, authorized);
2019 }
2020
2021
2022 static void _ieee802_1x_abort_auth(void *ctx, void *sta_ctx)
2023 {
2024         struct hostapd_data *hapd = ctx;
2025         struct sta_info *sta = sta_ctx;
2026         ieee802_1x_abort_auth(hapd, sta);
2027 }
2028
2029
2030 static void _ieee802_1x_tx_key(void *ctx, void *sta_ctx)
2031 {
2032 #ifndef CONFIG_FIPS
2033 #ifndef CONFIG_NO_RC4
2034         struct hostapd_data *hapd = ctx;
2035         struct sta_info *sta = sta_ctx;
2036         ieee802_1x_tx_key(hapd, sta);
2037 #endif /* CONFIG_NO_RC4 */
2038 #endif /* CONFIG_FIPS */
2039 }
2040
2041
2042 static void ieee802_1x_eapol_event(void *ctx, void *sta_ctx,
2043                                    enum eapol_event type)
2044 {
2045         /* struct hostapd_data *hapd = ctx; */
2046         struct sta_info *sta = sta_ctx;
2047         switch (type) {
2048         case EAPOL_AUTH_SM_CHANGE:
2049                 wpa_auth_sm_notify(sta->wpa_sm);
2050                 break;
2051         case EAPOL_AUTH_REAUTHENTICATE:
2052                 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
2053                 break;
2054         }
2055 }
2056
2057
2058 #ifdef CONFIG_ERP
2059
2060 static struct eap_server_erp_key *
2061 ieee802_1x_erp_get_key(void *ctx, const char *keyname)
2062 {
2063         struct hostapd_data *hapd = ctx;
2064         struct eap_server_erp_key *erp;
2065
2066         dl_list_for_each(erp, &hapd->erp_keys, struct eap_server_erp_key,
2067                          list) {
2068                 if (os_strcmp(erp->keyname_nai, keyname) == 0)
2069                         return erp;
2070         }
2071
2072         return NULL;
2073 }
2074
2075
2076 static int ieee802_1x_erp_add_key(void *ctx, struct eap_server_erp_key *erp)
2077 {
2078         struct hostapd_data *hapd = ctx;
2079
2080         dl_list_add(&hapd->erp_keys, &erp->list);
2081         return 0;
2082 }
2083
2084 #endif /* CONFIG_ERP */
2085
2086
2087 int ieee802_1x_init(struct hostapd_data *hapd)
2088 {
2089         int i;
2090         struct eapol_auth_config conf;
2091         struct eapol_auth_cb cb;
2092
2093         dl_list_init(&hapd->erp_keys);
2094
2095         os_memset(&conf, 0, sizeof(conf));
2096         conf.ctx = hapd;
2097         conf.eap_reauth_period = hapd->conf->eap_reauth_period;
2098         conf.wpa = hapd->conf->wpa;
2099         conf.individual_wep_key_len = hapd->conf->individual_wep_key_len;
2100         conf.eap_server = hapd->conf->eap_server;
2101         conf.ssl_ctx = hapd->ssl_ctx;
2102         conf.msg_ctx = hapd->msg_ctx;
2103         conf.eap_sim_db_priv = hapd->eap_sim_db_priv;
2104         conf.eap_req_id_text = hapd->conf->eap_req_id_text;
2105         conf.eap_req_id_text_len = hapd->conf->eap_req_id_text_len;
2106         conf.erp_send_reauth_start = hapd->conf->erp_send_reauth_start;
2107         conf.erp_domain = hapd->conf->erp_domain;
2108         conf.erp = hapd->conf->eap_server_erp;
2109         conf.tls_session_lifetime = hapd->conf->tls_session_lifetime;
2110         conf.pac_opaque_encr_key = hapd->conf->pac_opaque_encr_key;
2111         conf.eap_fast_a_id = hapd->conf->eap_fast_a_id;
2112         conf.eap_fast_a_id_len = hapd->conf->eap_fast_a_id_len;
2113         conf.eap_fast_a_id_info = hapd->conf->eap_fast_a_id_info;
2114         conf.eap_fast_prov = hapd->conf->eap_fast_prov;
2115         conf.pac_key_lifetime = hapd->conf->pac_key_lifetime;
2116         conf.pac_key_refresh_time = hapd->conf->pac_key_refresh_time;
2117         conf.eap_sim_aka_result_ind = hapd->conf->eap_sim_aka_result_ind;
2118         conf.tnc = hapd->conf->tnc;
2119         conf.wps = hapd->wps;
2120         conf.fragment_size = hapd->conf->fragment_size;
2121         conf.pwd_group = hapd->conf->pwd_group;
2122         conf.pbc_in_m1 = hapd->conf->pbc_in_m1;
2123         if (hapd->conf->server_id) {
2124                 conf.server_id = (const u8 *) hapd->conf->server_id;
2125                 conf.server_id_len = os_strlen(hapd->conf->server_id);
2126         } else {
2127                 conf.server_id = (const u8 *) "hostapd";
2128                 conf.server_id_len = 7;
2129         }
2130
2131         os_memset(&cb, 0, sizeof(cb));
2132         cb.eapol_send = ieee802_1x_eapol_send;
2133         cb.aaa_send = ieee802_1x_aaa_send;
2134         cb.finished = _ieee802_1x_finished;
2135         cb.get_eap_user = ieee802_1x_get_eap_user;
2136         cb.sta_entry_alive = ieee802_1x_sta_entry_alive;
2137         cb.logger = ieee802_1x_logger;
2138         cb.set_port_authorized = ieee802_1x_set_port_authorized;
2139         cb.abort_auth = _ieee802_1x_abort_auth;
2140         cb.tx_key = _ieee802_1x_tx_key;
2141         cb.eapol_event = ieee802_1x_eapol_event;
2142 #ifdef CONFIG_ERP
2143         cb.erp_get_key = ieee802_1x_erp_get_key;
2144         cb.erp_add_key = ieee802_1x_erp_add_key;
2145 #endif /* CONFIG_ERP */
2146
2147         hapd->eapol_auth = eapol_auth_init(&conf, &cb);
2148         if (hapd->eapol_auth == NULL)
2149                 return -1;
2150
2151         if ((hapd->conf->ieee802_1x || hapd->conf->wpa) &&
2152             hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 1))
2153                 return -1;
2154
2155 #ifndef CONFIG_NO_RADIUS
2156         if (radius_client_register(hapd->radius, RADIUS_AUTH,
2157                                    ieee802_1x_receive_auth, hapd))
2158                 return -1;
2159 #endif /* CONFIG_NO_RADIUS */
2160
2161         if (hapd->conf->default_wep_key_len) {
2162                 for (i = 0; i < 4; i++)
2163                         hostapd_drv_set_key(hapd->conf->iface, hapd,
2164                                             WPA_ALG_NONE, NULL, i, 0, NULL, 0,
2165                                             NULL, 0);
2166
2167                 ieee802_1x_rekey(hapd, NULL);
2168
2169                 if (hapd->eapol_auth->default_wep_key == NULL)
2170                         return -1;
2171         }
2172
2173         return 0;
2174 }
2175
2176
2177 void ieee802_1x_erp_flush(struct hostapd_data *hapd)
2178 {
2179         struct eap_server_erp_key *erp;
2180
2181         while ((erp = dl_list_first(&hapd->erp_keys, struct eap_server_erp_key,
2182                                     list)) != NULL) {
2183                 dl_list_del(&erp->list);
2184                 bin_clear_free(erp, sizeof(*erp));
2185         }
2186 }
2187
2188
2189 void ieee802_1x_deinit(struct hostapd_data *hapd)
2190 {
2191         eloop_cancel_timeout(ieee802_1x_rekey, hapd, NULL);
2192
2193         if (hapd->driver != NULL &&
2194             (hapd->conf->ieee802_1x || hapd->conf->wpa))
2195                 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0);
2196
2197         eapol_auth_deinit(hapd->eapol_auth);
2198         hapd->eapol_auth = NULL;
2199
2200         ieee802_1x_erp_flush(hapd);
2201 }
2202
2203
2204 int ieee802_1x_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
2205                          const u8 *buf, size_t len, int ack)
2206 {
2207         struct ieee80211_hdr *hdr;
2208         u8 *pos;
2209         const unsigned char rfc1042_hdr[ETH_ALEN] =
2210                 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
2211
2212         if (sta == NULL)
2213                 return -1;
2214         if (len < sizeof(*hdr) + sizeof(rfc1042_hdr) + 2)
2215                 return 0;
2216
2217         hdr = (struct ieee80211_hdr *) buf;
2218         pos = (u8 *) (hdr + 1);
2219         if (os_memcmp(pos, rfc1042_hdr, sizeof(rfc1042_hdr)) != 0)
2220                 return 0;
2221         pos += sizeof(rfc1042_hdr);
2222         if (WPA_GET_BE16(pos) != ETH_P_PAE)
2223                 return 0;
2224         pos += 2;
2225
2226         return ieee802_1x_eapol_tx_status(hapd, sta, pos, buf + len - pos,
2227                                           ack);
2228 }
2229
2230
2231 int ieee802_1x_eapol_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
2232                                const u8 *buf, int len, int ack)
2233 {
2234         const struct ieee802_1x_hdr *xhdr =
2235                 (const struct ieee802_1x_hdr *) buf;
2236         const u8 *pos = buf + sizeof(*xhdr);
2237         struct ieee802_1x_eapol_key *key;
2238
2239         if (len < (int) sizeof(*xhdr))
2240                 return 0;
2241         wpa_printf(MSG_DEBUG, "IEEE 802.1X: " MACSTR " TX status - version=%d "
2242                    "type=%d length=%d - ack=%d",
2243                    MAC2STR(sta->addr), xhdr->version, xhdr->type,
2244                    be_to_host16(xhdr->length), ack);
2245
2246         if (xhdr->type != IEEE802_1X_TYPE_EAPOL_KEY)
2247                 return 0;
2248
2249         if (pos + sizeof(struct wpa_eapol_key) <= buf + len) {
2250                 const struct wpa_eapol_key *wpa;
2251                 wpa = (const struct wpa_eapol_key *) pos;
2252                 if (wpa->type == EAPOL_KEY_TYPE_RSN ||
2253                     wpa->type == EAPOL_KEY_TYPE_WPA)
2254                         wpa_auth_eapol_key_tx_status(hapd->wpa_auth,
2255                                                      sta->wpa_sm, ack);
2256         }
2257
2258         /* EAPOL EAP-Packet packets are eventually re-sent by either Supplicant
2259          * or Authenticator state machines, but EAPOL-Key packets are not
2260          * retransmitted in case of failure. Try to re-send failed EAPOL-Key
2261          * packets couple of times because otherwise STA keys become
2262          * unsynchronized with AP. */
2263         if (!ack && pos + sizeof(*key) <= buf + len) {
2264                 key = (struct ieee802_1x_eapol_key *) pos;
2265                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
2266                                HOSTAPD_LEVEL_DEBUG, "did not Ack EAPOL-Key "
2267                                "frame (%scast index=%d)",
2268                                key->key_index & BIT(7) ? "uni" : "broad",
2269                                key->key_index & ~BIT(7));
2270                 /* TODO: re-send EAPOL-Key couple of times (with short delay
2271                  * between them?). If all attempt fail, report error and
2272                  * deauthenticate STA so that it will get new keys when
2273                  * authenticating again (e.g., after returning in range).
2274                  * Separate limit/transmit state needed both for unicast and
2275                  * broadcast keys(?) */
2276         }
2277         /* TODO: could move unicast key configuration from ieee802_1x_tx_key()
2278          * to here and change the key only if the EAPOL-Key packet was Acked.
2279          */
2280
2281         return 1;
2282 }
2283
2284
2285 u8 * ieee802_1x_get_identity(struct eapol_state_machine *sm, size_t *len)
2286 {
2287         if (sm == NULL || sm->identity == NULL)
2288                 return NULL;
2289
2290         *len = sm->identity_len;
2291         return sm->identity;
2292 }
2293
2294
2295 u8 * ieee802_1x_get_radius_class(struct eapol_state_machine *sm, size_t *len,
2296                                  int idx)
2297 {
2298         if (sm == NULL || sm->radius_class.attr == NULL ||
2299             idx >= (int) sm->radius_class.count)
2300                 return NULL;
2301
2302         *len = sm->radius_class.attr[idx].len;
2303         return sm->radius_class.attr[idx].data;
2304 }
2305
2306
2307 struct wpabuf * ieee802_1x_get_radius_cui(struct eapol_state_machine *sm)
2308 {
2309         if (sm == NULL)
2310                 return NULL;
2311         return sm->radius_cui;
2312 }
2313
2314
2315 const u8 * ieee802_1x_get_key(struct eapol_state_machine *sm, size_t *len)
2316 {
2317         *len = 0;
2318         if (sm == NULL)
2319                 return NULL;
2320
2321         *len = sm->eap_if->eapKeyDataLen;
2322         return sm->eap_if->eapKeyData;
2323 }
2324
2325
2326 void ieee802_1x_notify_port_enabled(struct eapol_state_machine *sm,
2327                                     int enabled)
2328 {
2329         if (sm == NULL)
2330                 return;
2331         sm->eap_if->portEnabled = enabled ? TRUE : FALSE;
2332         eapol_auth_step(sm);
2333 }
2334
2335
2336 void ieee802_1x_notify_port_valid(struct eapol_state_machine *sm,
2337                                   int valid)
2338 {
2339         if (sm == NULL)
2340                 return;
2341         sm->portValid = valid ? TRUE : FALSE;
2342         eapol_auth_step(sm);
2343 }
2344
2345
2346 void ieee802_1x_notify_pre_auth(struct eapol_state_machine *sm, int pre_auth)
2347 {
2348         if (sm == NULL)
2349                 return;
2350         if (pre_auth)
2351                 sm->flags |= EAPOL_SM_PREAUTH;
2352         else
2353                 sm->flags &= ~EAPOL_SM_PREAUTH;
2354 }
2355
2356
2357 static const char * bool_txt(Boolean val)
2358 {
2359         return val ? "TRUE" : "FALSE";
2360 }
2361
2362
2363 int ieee802_1x_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
2364 {
2365         /* TODO */
2366         return 0;
2367 }
2368
2369
2370 int ieee802_1x_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
2371                            char *buf, size_t buflen)
2372 {
2373         int len = 0, ret;
2374         struct eapol_state_machine *sm = sta->eapol_sm;
2375         struct os_reltime diff;
2376         const char *name1;
2377         const char *name2;
2378
2379         if (sm == NULL)
2380                 return 0;
2381
2382         ret = os_snprintf(buf + len, buflen - len,
2383                           "dot1xPaePortNumber=%d\n"
2384                           "dot1xPaePortProtocolVersion=%d\n"
2385                           "dot1xPaePortCapabilities=1\n"
2386                           "dot1xPaePortInitialize=%d\n"
2387                           "dot1xPaePortReauthenticate=FALSE\n",
2388                           sta->aid,
2389                           EAPOL_VERSION,
2390                           sm->initialize);
2391         if (os_snprintf_error(buflen - len, ret))
2392                 return len;
2393         len += ret;
2394
2395         /* dot1xAuthConfigTable */
2396         ret = os_snprintf(buf + len, buflen - len,
2397                           "dot1xAuthPaeState=%d\n"
2398                           "dot1xAuthBackendAuthState=%d\n"
2399                           "dot1xAuthAdminControlledDirections=%d\n"
2400                           "dot1xAuthOperControlledDirections=%d\n"
2401                           "dot1xAuthAuthControlledPortStatus=%d\n"
2402                           "dot1xAuthAuthControlledPortControl=%d\n"
2403                           "dot1xAuthQuietPeriod=%u\n"
2404                           "dot1xAuthServerTimeout=%u\n"
2405                           "dot1xAuthReAuthPeriod=%u\n"
2406                           "dot1xAuthReAuthEnabled=%s\n"
2407                           "dot1xAuthKeyTxEnabled=%s\n",
2408                           sm->auth_pae_state + 1,
2409                           sm->be_auth_state + 1,
2410                           sm->adminControlledDirections,
2411                           sm->operControlledDirections,
2412                           sm->authPortStatus,
2413                           sm->portControl,
2414                           sm->quietPeriod,
2415                           sm->serverTimeout,
2416                           sm->reAuthPeriod,
2417                           bool_txt(sm->reAuthEnabled),
2418                           bool_txt(sm->keyTxEnabled));
2419         if (os_snprintf_error(buflen - len, ret))
2420                 return len;
2421         len += ret;
2422
2423         /* dot1xAuthStatsTable */
2424         ret = os_snprintf(buf + len, buflen - len,
2425                           "dot1xAuthEapolFramesRx=%u\n"
2426                           "dot1xAuthEapolFramesTx=%u\n"
2427                           "dot1xAuthEapolStartFramesRx=%u\n"
2428                           "dot1xAuthEapolLogoffFramesRx=%u\n"
2429                           "dot1xAuthEapolRespIdFramesRx=%u\n"
2430                           "dot1xAuthEapolRespFramesRx=%u\n"
2431                           "dot1xAuthEapolReqIdFramesTx=%u\n"
2432                           "dot1xAuthEapolReqFramesTx=%u\n"
2433                           "dot1xAuthInvalidEapolFramesRx=%u\n"
2434                           "dot1xAuthEapLengthErrorFramesRx=%u\n"
2435                           "dot1xAuthLastEapolFrameVersion=%u\n"
2436                           "dot1xAuthLastEapolFrameSource=" MACSTR "\n",
2437                           sm->dot1xAuthEapolFramesRx,
2438                           sm->dot1xAuthEapolFramesTx,
2439                           sm->dot1xAuthEapolStartFramesRx,
2440                           sm->dot1xAuthEapolLogoffFramesRx,
2441                           sm->dot1xAuthEapolRespIdFramesRx,
2442                           sm->dot1xAuthEapolRespFramesRx,
2443                           sm->dot1xAuthEapolReqIdFramesTx,
2444                           sm->dot1xAuthEapolReqFramesTx,
2445                           sm->dot1xAuthInvalidEapolFramesRx,
2446                           sm->dot1xAuthEapLengthErrorFramesRx,
2447                           sm->dot1xAuthLastEapolFrameVersion,
2448                           MAC2STR(sm->addr));
2449         if (os_snprintf_error(buflen - len, ret))
2450                 return len;
2451         len += ret;
2452
2453         /* dot1xAuthDiagTable */
2454         ret = os_snprintf(buf + len, buflen - len,
2455                           "dot1xAuthEntersConnecting=%u\n"
2456                           "dot1xAuthEapLogoffsWhileConnecting=%u\n"
2457                           "dot1xAuthEntersAuthenticating=%u\n"
2458                           "dot1xAuthAuthSuccessesWhileAuthenticating=%u\n"
2459                           "dot1xAuthAuthTimeoutsWhileAuthenticating=%u\n"
2460                           "dot1xAuthAuthFailWhileAuthenticating=%u\n"
2461                           "dot1xAuthAuthEapStartsWhileAuthenticating=%u\n"
2462                           "dot1xAuthAuthEapLogoffWhileAuthenticating=%u\n"
2463                           "dot1xAuthAuthReauthsWhileAuthenticated=%u\n"
2464                           "dot1xAuthAuthEapStartsWhileAuthenticated=%u\n"
2465                           "dot1xAuthAuthEapLogoffWhileAuthenticated=%u\n"
2466                           "dot1xAuthBackendResponses=%u\n"
2467                           "dot1xAuthBackendAccessChallenges=%u\n"
2468                           "dot1xAuthBackendOtherRequestsToSupplicant=%u\n"
2469                           "dot1xAuthBackendAuthSuccesses=%u\n"
2470                           "dot1xAuthBackendAuthFails=%u\n",
2471                           sm->authEntersConnecting,
2472                           sm->authEapLogoffsWhileConnecting,
2473                           sm->authEntersAuthenticating,
2474                           sm->authAuthSuccessesWhileAuthenticating,
2475                           sm->authAuthTimeoutsWhileAuthenticating,
2476                           sm->authAuthFailWhileAuthenticating,
2477                           sm->authAuthEapStartsWhileAuthenticating,
2478                           sm->authAuthEapLogoffWhileAuthenticating,
2479                           sm->authAuthReauthsWhileAuthenticated,
2480                           sm->authAuthEapStartsWhileAuthenticated,
2481                           sm->authAuthEapLogoffWhileAuthenticated,
2482                           sm->backendResponses,
2483                           sm->backendAccessChallenges,
2484                           sm->backendOtherRequestsToSupplicant,
2485                           sm->backendAuthSuccesses,
2486                           sm->backendAuthFails);
2487         if (os_snprintf_error(buflen - len, ret))
2488                 return len;
2489         len += ret;
2490
2491         /* dot1xAuthSessionStatsTable */
2492         os_reltime_age(&sta->acct_session_start, &diff);
2493         ret = os_snprintf(buf + len, buflen - len,
2494                           /* TODO: dot1xAuthSessionOctetsRx */
2495                           /* TODO: dot1xAuthSessionOctetsTx */
2496                           /* TODO: dot1xAuthSessionFramesRx */
2497                           /* TODO: dot1xAuthSessionFramesTx */
2498                           "dot1xAuthSessionId=%08X-%08X\n"
2499                           "dot1xAuthSessionAuthenticMethod=%d\n"
2500                           "dot1xAuthSessionTime=%u\n"
2501                           "dot1xAuthSessionTerminateCause=999\n"
2502                           "dot1xAuthSessionUserName=%s\n",
2503                           sta->acct_session_id_hi, sta->acct_session_id_lo,
2504                           (wpa_key_mgmt_wpa_ieee8021x(
2505                                    wpa_auth_sta_key_mgmt(sta->wpa_sm))) ?
2506                           1 : 2,
2507                           (unsigned int) diff.sec,
2508                           sm->identity);
2509         if (os_snprintf_error(buflen - len, ret))
2510                 return len;
2511         len += ret;
2512
2513         if (sm->acct_multi_session_id_hi) {
2514                 ret = os_snprintf(buf + len, buflen - len,
2515                                   "authMultiSessionId=%08X+%08X\n",
2516                                   sm->acct_multi_session_id_hi,
2517                                   sm->acct_multi_session_id_lo);
2518                 if (os_snprintf_error(buflen - len, ret))
2519                         return len;
2520                 len += ret;
2521         }
2522
2523         name1 = eap_server_get_name(0, sm->eap_type_authsrv);
2524         name2 = eap_server_get_name(0, sm->eap_type_supp);
2525         ret = os_snprintf(buf + len, buflen - len,
2526                           "last_eap_type_as=%d (%s)\n"
2527                           "last_eap_type_sta=%d (%s)\n",
2528                           sm->eap_type_authsrv, name1,
2529                           sm->eap_type_supp, name2);
2530         if (os_snprintf_error(buflen - len, ret))
2531                 return len;
2532         len += ret;
2533
2534         return len;
2535 }
2536
2537
2538 static void ieee802_1x_finished(struct hostapd_data *hapd,
2539                                 struct sta_info *sta, int success,
2540                                 int remediation)
2541 {
2542         const u8 *key;
2543         size_t len;
2544         /* TODO: get PMKLifetime from WPA parameters */
2545         static const int dot11RSNAConfigPMKLifetime = 43200;
2546         unsigned int session_timeout;
2547
2548 #ifdef CONFIG_HS20
2549         if (remediation && !sta->remediation) {
2550                 sta->remediation = 1;
2551                 os_free(sta->remediation_url);
2552                 sta->remediation_url =
2553                         os_strdup(hapd->conf->subscr_remediation_url);
2554                 sta->remediation_method = 1; /* SOAP-XML SPP */
2555         }
2556
2557         if (success) {
2558                 if (sta->remediation) {
2559                         wpa_printf(MSG_DEBUG, "HS 2.0: Send WNM-Notification "
2560                                    "to " MACSTR " to indicate Subscription "
2561                                    "Remediation",
2562                                    MAC2STR(sta->addr));
2563                         hs20_send_wnm_notification(hapd, sta->addr,
2564                                                    sta->remediation_method,
2565                                                    sta->remediation_url);
2566                         os_free(sta->remediation_url);
2567                         sta->remediation_url = NULL;
2568                 }
2569
2570                 if (sta->hs20_deauth_req) {
2571                         wpa_printf(MSG_DEBUG, "HS 2.0: Send WNM-Notification "
2572                                    "to " MACSTR " to indicate imminent "
2573                                    "deauthentication", MAC2STR(sta->addr));
2574                         hs20_send_wnm_notification_deauth_req(
2575                                 hapd, sta->addr, sta->hs20_deauth_req);
2576                 }
2577         }
2578 #endif /* CONFIG_HS20 */
2579
2580         key = ieee802_1x_get_key(sta->eapol_sm, &len);
2581         if (sta->session_timeout_set)
2582                 session_timeout = sta->session_timeout;
2583         else
2584                 session_timeout = dot11RSNAConfigPMKLifetime;
2585         if (success && key && len >= PMK_LEN && !sta->remediation &&
2586             !sta->hs20_deauth_requested &&
2587             wpa_auth_pmksa_add(sta->wpa_sm, key, session_timeout,
2588                                sta->eapol_sm) == 0) {
2589                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
2590                                HOSTAPD_LEVEL_DEBUG,
2591                                "Added PMKSA cache entry (IEEE 802.1X)");
2592         }
2593
2594         if (!success) {
2595                 /*
2596                  * Many devices require deauthentication after WPS provisioning
2597                  * and some may not be be able to do that themselves, so
2598                  * disconnect the client here. In addition, this may also
2599                  * benefit IEEE 802.1X/EAPOL authentication cases, too since
2600                  * the EAPOL PAE state machine would remain in HELD state for
2601                  * considerable amount of time and some EAP methods, like
2602                  * EAP-FAST with anonymous provisioning, may require another
2603                  * EAPOL authentication to be started to complete connection.
2604                  */
2605                 wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "IEEE 802.1X: Force "
2606                         "disconnection after EAP-Failure");
2607                 /* Add a small sleep to increase likelihood of previously
2608                  * requested EAP-Failure TX getting out before this should the
2609                  * driver reorder operations.
2610                  */
2611                 os_sleep(0, 10000);
2612                 ap_sta_disconnect(hapd, sta, sta->addr,
2613                                   WLAN_REASON_IEEE_802_1X_AUTH_FAILED);
2614                 hostapd_wps_eap_completed(hapd);
2615         }
2616 }