hostapd/ieee802_1x.c

   1 /*
   2  * hostapd / IEEE 802.1X-2004 Authenticator
   3  * Copyright (c) 2002-2008, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #include "includes.h"
  16
  17 #include "common.h"
  18 #include "eloop.h"
  19 #include "crypto/md5.h"
  20 #include "crypto/crypto.h"
  21 #include "common/ieee802_11_defs.h"
  22 #include "common/wpa_ctrl.h"
  23 #include "radius/radius.h"
  24 #include "radius/radius_client.h"
  25 #include "eapol_auth/eapol_auth_sm.h"
  26 #include "eapol_auth/eapol_auth_sm_i.h"
  27 #include "hostapd.h"
  28 #include "ieee802_1x.h"
  29 #include "accounting.h"
  30 #include "sta_info.h"
  31 #include "wpa.h"
  32 #include "preauth.h"
  33 #include "pmksa_cache.h"
  34 #include "driver_i.h"
  35 #include "hw_features.h"
  36 #include "eap_server/eap.h"
  37
  38
  39 static void ieee802_1x_finished(struct hostapd_data *hapd,
  40                                 struct sta_info *sta, int success);
  41
  42
  43 static void ieee802_1x_send(struct hostapd_data *hapd, struct sta_info *sta,
  44                             u8 type, const u8 *data, size_t datalen)
  45 {
  46         u8 *buf;
  47         struct ieee802_1x_hdr *xhdr;
  48         size_t len;
  49         int encrypt = 0;
  50
  51         len = sizeof(*xhdr) + datalen;
  52         buf = os_zalloc(len);
  53         if (buf == NULL) {
  54                 wpa_printf(MSG_ERROR, "malloc() failed for "
  55                            "ieee802_1x_send(len=%lu)",
  56                            (unsigned long) len);
  57                 return;
  58         }
  59
  60         xhdr = (struct ieee802_1x_hdr *) buf;
  61         xhdr->version = hapd->conf->eapol_version;
  62         xhdr->type = type;
  63         xhdr->length = host_to_be16(datalen);
  64
  65         if (datalen > 0 && data != NULL)
  66                 os_memcpy(xhdr + 1, data, datalen);
  67
  68         if (wpa_auth_pairwise_set(sta->wpa_sm))
  69                 encrypt = 1;
  70         if (sta->flags & WLAN_STA_PREAUTH) {
  71                 rsn_preauth_send(hapd, sta, buf, len);
  72         } else {
  73                 hostapd_send_eapol(hapd, sta->addr, buf, len, encrypt);
  74         }
  75
  76         os_free(buf);
  77 }
  78
  79
  80 void ieee802_1x_set_sta_authorized(struct hostapd_data *hapd,
  81                                    struct sta_info *sta, int authorized)
  82 {
  83         int res;
  84
  85         if (sta->flags & WLAN_STA_PREAUTH)
  86                 return;
  87
  88         if (authorized) {
  89                 if (!(sta->flags & WLAN_STA_AUTHORIZED))
  90                         wpa_msg(hapd->msg_ctx, MSG_INFO,
  91                                 AP_STA_CONNECTED MACSTR, MAC2STR(sta->addr));
  92                 sta->flags |= WLAN_STA_AUTHORIZED;
  93                 res = hostapd_sta_set_flags(hapd, sta->addr,
  94                                             hostapd_sta_flags_to_drv(
  95                                                     sta->flags),
  96                                             WPA_STA_AUTHORIZED, ~0);
  97                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
  98                                HOSTAPD_LEVEL_DEBUG, "authorizing port");
  99         } else {
 100                 if ((sta->flags & (WLAN_STA_AUTHORIZED | WLAN_STA_ASSOC)) ==
 101                     (WLAN_STA_AUTHORIZED | WLAN_STA_ASSOC))
 102                         wpa_msg(hapd->msg_ctx, MSG_INFO,
 103                                 AP_STA_DISCONNECTED MACSTR,
 104                                 MAC2STR(sta->addr));
 105                 sta->flags &= ~WLAN_STA_AUTHORIZED;
 106                 res = hostapd_sta_set_flags(hapd, sta->addr,
 107                                             hostapd_sta_flags_to_drv(
 108                                                     sta->flags),
 109                                             0, ~WPA_STA_AUTHORIZED);
 110                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 111                                HOSTAPD_LEVEL_DEBUG, "unauthorizing port");
 112         }
 113
 114         if (res && errno != ENOENT) {
 115                 printf("Could not set station " MACSTR " flags for kernel "
 116                        "driver (errno=%d).\n", MAC2STR(sta->addr), errno);
 117         }
 118
 119         if (authorized)
 120                 accounting_sta_start(hapd, sta);
 121 }
 122
 123
 124 static void ieee802_1x_tx_key_one(struct hostapd_data *hapd,
 125                                   struct sta_info *sta,
 126                                   int idx, int broadcast,
 127                                   u8 *key_data, size_t key_len)
 128 {
 129         u8 *buf, *ekey;
 130         struct ieee802_1x_hdr *hdr;
 131         struct ieee802_1x_eapol_key *key;
 132         size_t len, ekey_len;
 133         struct eapol_state_machine *sm = sta->eapol_sm;
 134
 135         if (sm == NULL)
 136                 return;
 137
 138         len = sizeof(*key) + key_len;
 139         buf = os_zalloc(sizeof(*hdr) + len);
 140         if (buf == NULL)
 141                 return;
 142
 143         hdr = (struct ieee802_1x_hdr *) buf;
 144         key = (struct ieee802_1x_eapol_key *) (hdr + 1);
 145         key->type = EAPOL_KEY_TYPE_RC4;
 146         key->key_length = htons(key_len);
 147         wpa_get_ntp_timestamp(key->replay_counter);
 148
 149         if (os_get_random(key->key_iv, sizeof(key->key_iv))) {
 150                 wpa_printf(MSG_ERROR, "Could not get random numbers");
 151                 os_free(buf);
 152                 return;
 153         }
 154
 155         key->key_index = idx | (broadcast ? 0 : BIT(7));
 156         if (hapd->conf->eapol_key_index_workaround) {
 157                 /* According to some information, WinXP Supplicant seems to
 158                  * interpret bit7 as an indication whether the key is to be
 159                  * activated, so make it possible to enable workaround that
 160                  * sets this bit for all keys. */
 161                 key->key_index |= BIT(7);
 162         }
 163
 164         /* Key is encrypted using "Key-IV + MSK[0..31]" as the RC4-key and
 165          * MSK[32..63] is used to sign the message. */
 166         if (sm->eap_if->eapKeyData == NULL || sm->eap_if->eapKeyDataLen < 64) {
 167                 wpa_printf(MSG_ERROR, "No eapKeyData available for encrypting "
 168                            "and signing EAPOL-Key");
 169                 os_free(buf);
 170                 return;
 171         }
 172         os_memcpy((u8 *) (key + 1), key_data, key_len);
 173         ekey_len = sizeof(key->key_iv) + 32;
 174         ekey = os_malloc(ekey_len);
 175         if (ekey == NULL) {
 176                 wpa_printf(MSG_ERROR, "Could not encrypt key");
 177                 os_free(buf);
 178                 return;
 179         }
 180         os_memcpy(ekey, key->key_iv, sizeof(key->key_iv));
 181         os_memcpy(ekey + sizeof(key->key_iv), sm->eap_if->eapKeyData, 32);
 182         rc4_skip(ekey, ekey_len, 0, (u8 *) (key + 1), key_len);
 183         os_free(ekey);
 184
 185         /* This header is needed here for HMAC-MD5, but it will be regenerated
 186          * in ieee802_1x_send() */
 187         hdr->version = hapd->conf->eapol_version;
 188         hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
 189         hdr->length = host_to_be16(len);
 190         hmac_md5(sm->eap_if->eapKeyData + 32, 32, buf, sizeof(*hdr) + len,
 191                  key->key_signature);
 192
 193         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key to " MACSTR
 194                    " (%s index=%d)", MAC2STR(sm->addr),
 195                    broadcast ? "broadcast" : "unicast", idx);
 196         ieee802_1x_send(hapd, sta, IEEE802_1X_TYPE_EAPOL_KEY, (u8 *) key, len);
 197         if (sta->eapol_sm)
 198                 sta->eapol_sm->dot1xAuthEapolFramesTx++;
 199         os_free(buf);
 200 }
 201
 202
 203 #ifndef CONFIG_NO_VLAN
 204 static struct hostapd_wep_keys *
 205 ieee802_1x_group_alloc(struct hostapd_data *hapd, const char *ifname)
 206 {
 207         struct hostapd_wep_keys *key;
 208
 209         key = os_zalloc(sizeof(*key));
 210         if (key == NULL)
 211                 return NULL;
 212
 213         key->default_len = hapd->conf->default_wep_key_len;
 214
 215         if (key->idx >= hapd->conf->broadcast_key_idx_max ||
 216             key->idx < hapd->conf->broadcast_key_idx_min)
 217                 key->idx = hapd->conf->broadcast_key_idx_min;
 218         else
 219                 key->idx++;
 220
 221         if (!key->key[key->idx])
 222                 key->key[key->idx] = os_malloc(key->default_len);
 223         if (key->key[key->idx] == NULL ||
 224             os_get_random(key->key[key->idx], key->default_len)) {
 225                 printf("Could not generate random WEP key (dynamic VLAN).\n");
 226                 os_free(key->key[key->idx]);
 227                 key->key[key->idx] = NULL;
 228                 os_free(key);
 229                 return NULL;
 230         }
 231         key->len[key->idx] = key->default_len;
 232
 233         wpa_printf(MSG_DEBUG, "%s: Default WEP idx %d for dynamic VLAN\n",
 234                    ifname, key->idx);
 235         wpa_hexdump_key(MSG_DEBUG, "Default WEP key (dynamic VLAN)",
 236                         key->key[key->idx], key->len[key->idx]);
 237
 238         if (hostapd_set_key(ifname, hapd, WPA_ALG_WEP, NULL, key->idx, 1,
 239                             NULL, 0, key->key[key->idx], key->len[key->idx]))
 240                 printf("Could not set dynamic VLAN WEP encryption key.\n");
 241
 242         hostapd_set_drv_ieee8021x(hapd, ifname, 1);
 243
 244         return key;
 245 }
 246
 247
 248 static struct hostapd_wep_keys *
 249 ieee802_1x_get_group(struct hostapd_data *hapd, struct hostapd_ssid *ssid,
 250                      size_t vlan_id)
 251 {
 252         const char *ifname;
 253
 254         if (vlan_id == 0)
 255                 return &ssid->wep;
 256
 257         if (vlan_id <= ssid->max_dyn_vlan_keys && ssid->dyn_vlan_keys &&
 258             ssid->dyn_vlan_keys[vlan_id])
 259                 return ssid->dyn_vlan_keys[vlan_id];
 260
 261         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Creating new group "
 262                    "state machine for VLAN ID %lu",
 263                    (unsigned long) vlan_id);
 264
 265         ifname = hostapd_get_vlan_id_ifname(hapd->conf->vlan, vlan_id);
 266         if (ifname == NULL) {
 267                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Unknown VLAN ID %lu - "
 268                            "cannot create group key state machine",
 269                            (unsigned long) vlan_id);
 270                 return NULL;
 271         }
 272
 273         if (ssid->dyn_vlan_keys == NULL) {
 274                 int size = (vlan_id + 1) * sizeof(ssid->dyn_vlan_keys[0]);
 275                 ssid->dyn_vlan_keys = os_zalloc(size);
 276                 if (ssid->dyn_vlan_keys == NULL)
 277                         return NULL;
 278                 ssid->max_dyn_vlan_keys = vlan_id;
 279         }
 280
 281         if (ssid->max_dyn_vlan_keys < vlan_id) {
 282                 struct hostapd_wep_keys **na;
 283                 int size = (vlan_id + 1) * sizeof(ssid->dyn_vlan_keys[0]);
 284                 na = os_realloc(ssid->dyn_vlan_keys, size);
 285                 if (na == NULL)
 286                         return NULL;
 287                 ssid->dyn_vlan_keys = na;
 288                 os_memset(&ssid->dyn_vlan_keys[ssid->max_dyn_vlan_keys + 1], 0,
 289                           (vlan_id - ssid->max_dyn_vlan_keys) *
 290                           sizeof(ssid->dyn_vlan_keys[0]));
 291                 ssid->max_dyn_vlan_keys = vlan_id;
 292         }
 293
 294         ssid->dyn_vlan_keys[vlan_id] = ieee802_1x_group_alloc(hapd, ifname);
 295
 296         return ssid->dyn_vlan_keys[vlan_id];
 297 }
 298 #endif /* CONFIG_NO_VLAN */
 299
 300
 301 void ieee802_1x_tx_key(struct hostapd_data *hapd, struct sta_info *sta)
 302 {
 303         struct eapol_authenticator *eapol = hapd->eapol_auth;
 304         struct eapol_state_machine *sm = sta->eapol_sm;
 305 #ifndef CONFIG_NO_VLAN
 306         struct hostapd_wep_keys *key = NULL;
 307         int vlan_id;
 308 #endif /* CONFIG_NO_VLAN */
 309
 310         if (sm == NULL || !sm->eap_if->eapKeyData)
 311                 return;
 312
 313         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key(s) to " MACSTR,
 314                    MAC2STR(sta->addr));
 315
 316 #ifndef CONFIG_NO_VLAN
 317         vlan_id = sta->vlan_id;
 318         if (vlan_id < 0 || vlan_id > MAX_VLAN_ID)
 319                 vlan_id = 0;
 320
 321         if (vlan_id) {
 322                 key = ieee802_1x_get_group(hapd, sta->ssid, vlan_id);
 323                 if (key && key->key[key->idx])
 324                         ieee802_1x_tx_key_one(hapd, sta, key->idx, 1,
 325                                               key->key[key->idx],
 326                                               key->len[key->idx]);
 327         } else
 328 #endif /* CONFIG_NO_VLAN */
 329         if (eapol->default_wep_key) {
 330                 ieee802_1x_tx_key_one(hapd, sta, eapol->default_wep_key_idx, 1,
 331                                       eapol->default_wep_key,
 332                                       hapd->conf->default_wep_key_len);
 333         }
 334
 335         if (hapd->conf->individual_wep_key_len > 0) {
 336                 u8 *ikey;
 337                 ikey = os_malloc(hapd->conf->individual_wep_key_len);
 338                 if (ikey == NULL ||
 339                     os_get_random(ikey, hapd->conf->individual_wep_key_len)) {
 340                         wpa_printf(MSG_ERROR, "Could not generate random "
 341                                    "individual WEP key.");
 342                         os_free(ikey);
 343                         return;
 344                 }
 345
 346                 wpa_hexdump_key(MSG_DEBUG, "Individual WEP key",
 347                                 ikey, hapd->conf->individual_wep_key_len);
 348
 349                 ieee802_1x_tx_key_one(hapd, sta, 0, 0, ikey,
 350                                       hapd->conf->individual_wep_key_len);
 351
 352                 /* TODO: set encryption in TX callback, i.e., only after STA
 353                  * has ACKed EAPOL-Key frame */
 354                 if (hostapd_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
 355                                     sta->addr, 0, 1, NULL, 0, ikey,
 356                                     hapd->conf->individual_wep_key_len)) {
 357                         wpa_printf(MSG_ERROR, "Could not set individual WEP "
 358                                    "encryption.");
 359                 }
 360
 361                 os_free(ikey);
 362         }
 363 }
 364
 365
 366 const char *radius_mode_txt(struct hostapd_data *hapd)
 367 {
 368         if (hapd->iface->current_mode == NULL)
 369                 return "802.11";
 370
 371         switch (hapd->iface->current_mode->mode) {
 372         case HOSTAPD_MODE_IEEE80211A:
 373                 return "802.11a";
 374         case HOSTAPD_MODE_IEEE80211G:
 375                 return "802.11g";
 376         case HOSTAPD_MODE_IEEE80211B:
 377         default:
 378                 return "802.11b";
 379         }
 380 }
 381
 382
 383 int radius_sta_rate(struct hostapd_data *hapd, struct sta_info *sta)
 384 {
 385         int i;
 386         u8 rate = 0;
 387
 388         for (i = 0; i < sta->supported_rates_len; i++)
 389                 if ((sta->supported_rates[i] & 0x7f) > rate)
 390                         rate = sta->supported_rates[i] & 0x7f;
 391
 392         return rate;
 393 }
 394
 395
 396 #ifndef CONFIG_NO_RADIUS
 397 static void ieee802_1x_learn_identity(struct hostapd_data *hapd,
 398                                       struct eapol_state_machine *sm,
 399                                       const u8 *eap, size_t len)
 400 {
 401         const u8 *identity;
 402         size_t identity_len;
 403
 404         if (len <= sizeof(struct eap_hdr) ||
 405             eap[sizeof(struct eap_hdr)] != EAP_TYPE_IDENTITY)
 406                 return;
 407
 408         identity = eap_get_identity(sm->eap, &identity_len);
 409         if (identity == NULL)
 410                 return;
 411
 412         /* Save station identity for future RADIUS packets */
 413         os_free(sm->identity);
 414         sm->identity = os_malloc(identity_len + 1);
 415         if (sm->identity == NULL) {
 416                 sm->identity_len = 0;
 417                 return;
 418         }
 419
 420         os_memcpy(sm->identity, identity, identity_len);
 421         sm->identity_len = identity_len;
 422         sm->identity[identity_len] = '\0';
 423         hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
 424                        HOSTAPD_LEVEL_DEBUG, "STA identity '%s'", sm->identity);
 425         sm->dot1xAuthEapolRespIdFramesRx++;
 426 }
 427
 428
 429 static void ieee802_1x_encapsulate_radius(struct hostapd_data *hapd,
 430                                           struct sta_info *sta,
 431                                           const u8 *eap, size_t len)
 432 {
 433         struct radius_msg *msg;
 434         char buf[128];
 435         struct eapol_state_machine *sm = sta->eapol_sm;
 436
 437         if (sm == NULL)
 438                 return;
 439
 440         ieee802_1x_learn_identity(hapd, sm, eap, len);
 441
 442         wpa_printf(MSG_DEBUG, "Encapsulating EAP message into a RADIUS "
 443                    "packet");
 444
 445         sm->radius_identifier = radius_client_get_id(hapd->radius);
 446         msg = radius_msg_new(RADIUS_CODE_ACCESS_REQUEST,
 447                              sm->radius_identifier);
 448         if (msg == NULL) {
 449                 printf("Could not create net RADIUS packet\n");
 450                 return;
 451         }
 452
 453         radius_msg_make_authenticator(msg, (u8 *) sta, sizeof(*sta));
 454
 455         if (sm->identity &&
 456             !radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME,
 457                                  sm->identity, sm->identity_len)) {
 458                 printf("Could not add User-Name\n");
 459                 goto fail;
 460         }
 461
 462         if (hapd->conf->own_ip_addr.af == AF_INET &&
 463             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS,
 464                                  (u8 *) &hapd->conf->own_ip_addr.u.v4, 4)) {
 465                 printf("Could not add NAS-IP-Address\n");
 466                 goto fail;
 467         }
 468
 469 #ifdef CONFIG_IPV6
 470         if (hapd->conf->own_ip_addr.af == AF_INET6 &&
 471             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IPV6_ADDRESS,
 472                                  (u8 *) &hapd->conf->own_ip_addr.u.v6, 16)) {
 473                 printf("Could not add NAS-IPv6-Address\n");
 474                 goto fail;
 475         }
 476 #endif /* CONFIG_IPV6 */
 477
 478         if (hapd->conf->nas_identifier &&
 479             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IDENTIFIER,
 480                                  (u8 *) hapd->conf->nas_identifier,
 481                                  os_strlen(hapd->conf->nas_identifier))) {
 482                 printf("Could not add NAS-Identifier\n");
 483                 goto fail;
 484         }
 485
 486         if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT, sta->aid)) {
 487                 printf("Could not add NAS-Port\n");
 488                 goto fail;
 489         }
 490
 491         os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT ":%s",
 492                     MAC2STR(hapd->own_addr), hapd->conf->ssid.ssid);
 493         buf[sizeof(buf) - 1] = '\0';
 494         if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLED_STATION_ID,
 495                                  (u8 *) buf, os_strlen(buf))) {
 496                 printf("Could not add Called-Station-Id\n");
 497                 goto fail;
 498         }
 499
 500         os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
 501                     MAC2STR(sta->addr));
 502         buf[sizeof(buf) - 1] = '\0';
 503         if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID,
 504                                  (u8 *) buf, os_strlen(buf))) {
 505                 printf("Could not add Calling-Station-Id\n");
 506                 goto fail;
 507         }
 508
 509         /* TODO: should probably check MTU from driver config; 2304 is max for
 510          * IEEE 802.11, but use 1400 to avoid problems with too large packets
 511          */
 512         if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_FRAMED_MTU, 1400)) {
 513                 printf("Could not add Framed-MTU\n");
 514                 goto fail;
 515         }
 516
 517         if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT_TYPE,
 518                                        RADIUS_NAS_PORT_TYPE_IEEE_802_11)) {
 519                 printf("Could not add NAS-Port-Type\n");
 520                 goto fail;
 521         }
 522
 523         if (sta->flags & WLAN_STA_PREAUTH) {
 524                 os_strlcpy(buf, "IEEE 802.11i Pre-Authentication",
 525                            sizeof(buf));
 526         } else {
 527                 os_snprintf(buf, sizeof(buf), "CONNECT %d%sMbps %s",
 528                             radius_sta_rate(hapd, sta) / 2,
 529                             (radius_sta_rate(hapd, sta) & 1) ? ".5" : "",
 530                             radius_mode_txt(hapd));
 531                 buf[sizeof(buf) - 1] = '\0';
 532         }
 533         if (!radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO,
 534                                  (u8 *) buf, os_strlen(buf))) {
 535                 printf("Could not add Connect-Info\n");
 536                 goto fail;
 537         }
 538
 539         if (eap && !radius_msg_add_eap(msg, eap, len)) {
 540                 printf("Could not add EAP-Message\n");
 541                 goto fail;
 542         }
 543
 544         /* State attribute must be copied if and only if this packet is
 545          * Access-Request reply to the previous Access-Challenge */
 546         if (sm->last_recv_radius &&
 547             radius_msg_get_hdr(sm->last_recv_radius)->code ==
 548             RADIUS_CODE_ACCESS_CHALLENGE) {
 549                 int res = radius_msg_copy_attr(msg, sm->last_recv_radius,
 550                                                RADIUS_ATTR_STATE);
 551                 if (res < 0) {
 552                         printf("Could not copy State attribute from previous "
 553                                "Access-Challenge\n");
 554                         goto fail;
 555                 }
 556                 if (res > 0) {
 557                         wpa_printf(MSG_DEBUG, "Copied RADIUS State Attribute");
 558                 }
 559         }
 560
 561         radius_client_send(hapd->radius, msg, RADIUS_AUTH, sta->addr);
 562         return;
 563
 564  fail:
 565         radius_msg_free(msg);
 566 }
 567 #endif /* CONFIG_NO_RADIUS */
 568
 569
 570 static void handle_eap_response(struct hostapd_data *hapd,
 571                                 struct sta_info *sta, struct eap_hdr *eap,
 572                                 size_t len)
 573 {
 574         u8 type, *data;
 575         struct eapol_state_machine *sm = sta->eapol_sm;
 576         if (sm == NULL)
 577                 return;
 578
 579         data = (u8 *) (eap + 1);
 580
 581         if (len < sizeof(*eap) + 1) {
 582                 printf("handle_eap_response: too short response data\n");
 583                 return;
 584         }
 585
 586         sm->eap_type_supp = type = data[0];
 587
 588         hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
 589                        HOSTAPD_LEVEL_DEBUG, "received EAP packet (code=%d "
 590                        "id=%d len=%d) from STA: EAP Response-%s (%d)",
 591                        eap->code, eap->identifier, be_to_host16(eap->length),
 592                        eap_server_get_name(0, type), type);
 593
 594         sm->dot1xAuthEapolRespFramesRx++;
 595
 596         wpabuf_free(sm->eap_if->eapRespData);
 597         sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len);
 598         sm->eapolEap = TRUE;
 599 }
 600
 601
 602 /* Process incoming EAP packet from Supplicant */
 603 static void handle_eap(struct hostapd_data *hapd, struct sta_info *sta,
 604                        u8 *buf, size_t len)
 605 {
 606         struct eap_hdr *eap;
 607         u16 eap_len;
 608
 609         if (len < sizeof(*eap)) {
 610                 printf("   too short EAP packet\n");
 611                 return;
 612         }
 613
 614         eap = (struct eap_hdr *) buf;
 615
 616         eap_len = be_to_host16(eap->length);
 617         wpa_printf(MSG_DEBUG, "EAP: code=%d identifier=%d length=%d",
 618                    eap->code, eap->identifier, eap_len);
 619         if (eap_len < sizeof(*eap)) {
 620                 wpa_printf(MSG_DEBUG, "   Invalid EAP length");
 621                 return;
 622         } else if (eap_len > len) {
 623                 wpa_printf(MSG_DEBUG, "   Too short frame to contain this EAP "
 624                            "packet");
 625                 return;
 626         } else if (eap_len < len) {
 627                 wpa_printf(MSG_DEBUG, "   Ignoring %lu extra bytes after EAP "
 628                            "packet", (unsigned long) len - eap_len);
 629         }
 630
 631         switch (eap->code) {
 632         case EAP_CODE_REQUEST:
 633                 wpa_printf(MSG_DEBUG, " (request)");
 634                 return;
 635         case EAP_CODE_RESPONSE:
 636                 wpa_printf(MSG_DEBUG, " (response)");
 637                 handle_eap_response(hapd, sta, eap, eap_len);
 638                 break;
 639         case EAP_CODE_SUCCESS:
 640                 wpa_printf(MSG_DEBUG, " (success)");
 641                 return;
 642         case EAP_CODE_FAILURE:
 643                 wpa_printf(MSG_DEBUG, " (failure)");
 644                 return;
 645         default:
 646                 wpa_printf(MSG_DEBUG, " (unknown code)");
 647                 return;
 648         }
 649 }
 650
 651
 652 static struct eapol_state_machine *
 653 ieee802_1x_alloc_eapol_sm(struct hostapd_data *hapd, struct sta_info *sta)
 654 {
 655         int flags = 0;
 656         if (sta->flags & WLAN_STA_PREAUTH)
 657                 flags |= EAPOL_SM_PREAUTH;
 658         if (sta->wpa_sm) {
 659                 if (wpa_auth_sta_get_pmksa(sta->wpa_sm))
 660                         flags |= EAPOL_SM_USES_WPA;
 661                 if (wpa_auth_sta_get_pmksa(sta->wpa_sm))
 662                         flags |= EAPOL_SM_FROM_PMKSA_CACHE;
 663         }
 664         return eapol_auth_alloc(hapd->eapol_auth, sta->addr, flags,
 665                                 sta->wps_ie, sta);
 666 }
 667
 668
 669 /**
 670  * ieee802_1x_receive - Process the EAPOL frames from the Supplicant
 671  * @hapd: hostapd BSS data
 672  * @sa: Source address (sender of the EAPOL frame)
 673  * @buf: EAPOL frame
 674  * @len: Length of buf in octets
 675  *
 676  * This function is called for each incoming EAPOL frame from the interface
 677  */
 678 void ieee802_1x_receive(struct hostapd_data *hapd, const u8 *sa, const u8 *buf,
 679                         size_t len)
 680 {
 681         struct sta_info *sta;
 682         struct ieee802_1x_hdr *hdr;
 683         struct ieee802_1x_eapol_key *key;
 684         u16 datalen;
 685         struct rsn_pmksa_cache_entry *pmksa;
 686
 687         if (!hapd->conf->ieee802_1x && !hapd->conf->wpa &&
 688             !hapd->conf->wps_state)
 689                 return;
 690
 691         wpa_printf(MSG_DEBUG, "IEEE 802.1X: %lu bytes from " MACSTR,
 692                    (unsigned long) len, MAC2STR(sa));
 693         sta = ap_get_sta(hapd, sa);
 694         if (!sta || !(sta->flags & WLAN_STA_ASSOC)) {
 695                 wpa_printf(MSG_DEBUG, "IEEE 802.1X data frame from not "
 696                            "associated STA");
 697                 return;
 698         }
 699
 700         if (len < sizeof(*hdr)) {
 701                 printf("   too short IEEE 802.1X packet\n");
 702                 return;
 703         }
 704
 705         hdr = (struct ieee802_1x_hdr *) buf;
 706         datalen = be_to_host16(hdr->length);
 707         wpa_printf(MSG_DEBUG, "   IEEE 802.1X: version=%d type=%d length=%d",
 708                    hdr->version, hdr->type, datalen);
 709
 710         if (len - sizeof(*hdr) < datalen) {
 711                 printf("   frame too short for this IEEE 802.1X packet\n");
 712                 if (sta->eapol_sm)
 713                         sta->eapol_sm->dot1xAuthEapLengthErrorFramesRx++;
 714                 return;
 715         }
 716         if (len - sizeof(*hdr) > datalen) {
 717                 wpa_printf(MSG_DEBUG, "   ignoring %lu extra octets after "
 718                            "IEEE 802.1X packet",
 719                            (unsigned long) len - sizeof(*hdr) - datalen);
 720         }
 721
 722         if (sta->eapol_sm) {
 723                 sta->eapol_sm->dot1xAuthLastEapolFrameVersion = hdr->version;
 724                 sta->eapol_sm->dot1xAuthEapolFramesRx++;
 725         }
 726
 727         key = (struct ieee802_1x_eapol_key *) (hdr + 1);
 728         if (datalen >= sizeof(struct ieee802_1x_eapol_key) &&
 729             hdr->type == IEEE802_1X_TYPE_EAPOL_KEY &&
 730             (key->type == EAPOL_KEY_TYPE_WPA ||
 731              key->type == EAPOL_KEY_TYPE_RSN)) {
 732                 wpa_receive(hapd->wpa_auth, sta->wpa_sm, (u8 *) hdr,
 733                             sizeof(*hdr) + datalen);
 734                 return;
 735         }
 736
 737         if ((!hapd->conf->ieee802_1x &&
 738              !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) ||
 739             wpa_key_mgmt_wpa_psk(wpa_auth_sta_key_mgmt(sta->wpa_sm)))
 740                 return;
 741
 742         if (!sta->eapol_sm) {
 743                 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
 744                 if (!sta->eapol_sm)
 745                         return;
 746
 747 #ifdef CONFIG_WPS
 748                 if (!hapd->conf->ieee802_1x &&
 749                     ((sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) ==
 750                      WLAN_STA_MAYBE_WPS)) {
 751                         /*
 752                          * Delay EAPOL frame transmission until a possible WPS
 753                          * STA initiates the handshake with EAPOL-Start.
 754                          */
 755                         sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
 756                 }
 757 #endif /* CONFIG_WPS */
 758
 759                 sta->eapol_sm->eap_if->portEnabled = TRUE;
 760         }
 761
 762         /* since we support version 1, we can ignore version field and proceed
 763          * as specified in version 1 standard [IEEE Std 802.1X-2001, 7.5.5] */
 764         /* TODO: actually, we are not version 1 anymore.. However, Version 2
 765          * does not change frame contents, so should be ok to process frames
 766          * more or less identically. Some changes might be needed for
 767          * verification of fields. */
 768
 769         switch (hdr->type) {
 770         case IEEE802_1X_TYPE_EAP_PACKET:
 771                 handle_eap(hapd, sta, (u8 *) (hdr + 1), datalen);
 772                 break;
 773
 774         case IEEE802_1X_TYPE_EAPOL_START:
 775                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 776                                HOSTAPD_LEVEL_DEBUG, "received EAPOL-Start "
 777                                "from STA");
 778                 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
 779                 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
 780                 if (pmksa) {
 781                         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
 782                                        HOSTAPD_LEVEL_DEBUG, "cached PMKSA "
 783                                        "available - ignore it since "
 784                                        "STA sent EAPOL-Start");
 785                         wpa_auth_sta_clear_pmksa(sta->wpa_sm, pmksa);
 786                 }
 787                 sta->eapol_sm->eapolStart = TRUE;
 788                 sta->eapol_sm->dot1xAuthEapolStartFramesRx++;
 789                 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
 790                 break;
 791
 792         case IEEE802_1X_TYPE_EAPOL_LOGOFF:
 793                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 794                                HOSTAPD_LEVEL_DEBUG, "received EAPOL-Logoff "
 795                                "from STA");
 796                 sta->acct_terminate_cause =
 797                         RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
 798                 accounting_sta_stop(hapd, sta);
 799                 sta->eapol_sm->eapolLogoff = TRUE;
 800                 sta->eapol_sm->dot1xAuthEapolLogoffFramesRx++;
 801                 break;
 802
 803         case IEEE802_1X_TYPE_EAPOL_KEY:
 804                 wpa_printf(MSG_DEBUG, "   EAPOL-Key");
 805                 if (!(sta->flags & WLAN_STA_AUTHORIZED)) {
 806                         wpa_printf(MSG_DEBUG, "   Dropped key data from "
 807                                    "unauthorized Supplicant");
 808                         break;
 809                 }
 810                 break;
 811
 812         case IEEE802_1X_TYPE_EAPOL_ENCAPSULATED_ASF_ALERT:
 813                 wpa_printf(MSG_DEBUG, "   EAPOL-Encapsulated-ASF-Alert");
 814                 /* TODO: implement support for this; show data */
 815                 break;
 816
 817         default:
 818                 wpa_printf(MSG_DEBUG, "   unknown IEEE 802.1X packet type");
 819                 sta->eapol_sm->dot1xAuthInvalidEapolFramesRx++;
 820                 break;
 821         }
 822
 823         eapol_auth_step(sta->eapol_sm);
 824 }
 825
 826
 827 /**
 828  * ieee802_1x_new_station - Start IEEE 802.1X authentication
 829  * @hapd: hostapd BSS data
 830  * @sta: The station
 831  *
 832  * This function is called to start IEEE 802.1X authentication when a new
 833  * station completes IEEE 802.11 association.
 834  */
 835 void ieee802_1x_new_station(struct hostapd_data *hapd, struct sta_info *sta)
 836 {
 837         struct rsn_pmksa_cache_entry *pmksa;
 838         int reassoc = 1;
 839         int force_1x = 0;
 840
 841 #ifdef CONFIG_WPS
 842         if (hapd->conf->wps_state && hapd->conf->wpa &&
 843             (sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) {
 844                 /*
 845                  * Need to enable IEEE 802.1X/EAPOL state machines for possible
 846                  * WPS handshake even if IEEE 802.1X/EAPOL is not used for
 847                  * authentication in this BSS.
 848                  */
 849                 force_1x = 1;
 850         }
 851 #endif /* CONFIG_WPS */
 852
 853         if ((!force_1x && !hapd->conf->ieee802_1x) ||
 854             wpa_key_mgmt_wpa_psk(wpa_auth_sta_key_mgmt(sta->wpa_sm)))
 855                 return;
 856
 857         if (sta->eapol_sm == NULL) {
 858                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 859                                HOSTAPD_LEVEL_DEBUG, "start authentication");
 860                 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
 861                 if (sta->eapol_sm == NULL) {
 862                         hostapd_logger(hapd, sta->addr,
 863                                        HOSTAPD_MODULE_IEEE8021X,
 864                                        HOSTAPD_LEVEL_INFO,
 865                                        "failed to allocate state machine");
 866                         return;
 867                 }
 868                 reassoc = 0;
 869         }
 870
 871 #ifdef CONFIG_WPS
 872         sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
 873         if (!hapd->conf->ieee802_1x && !(sta->flags & WLAN_STA_WPS)) {
 874                 /*
 875                  * Delay EAPOL frame transmission until a possible WPS
 876                  * initiates the handshake with EAPOL-Start.
 877                  */
 878                 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
 879         }
 880 #endif /* CONFIG_WPS */
 881
 882         sta->eapol_sm->eap_if->portEnabled = TRUE;
 883
 884         pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
 885         if (pmksa) {
 886                 int old_vlanid;
 887
 888                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 889                                HOSTAPD_LEVEL_DEBUG,
 890                                "PMK from PMKSA cache - skip IEEE 802.1X/EAP");
 891                 /* Setup EAPOL state machines to already authenticated state
 892                  * because of existing PMKSA information in the cache. */
 893                 sta->eapol_sm->keyRun = TRUE;
 894                 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
 895                 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
 896                 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
 897                 sta->eapol_sm->authSuccess = TRUE;
 898                 if (sta->eapol_sm->eap)
 899                         eap_sm_notify_cached(sta->eapol_sm->eap);
 900                 old_vlanid = sta->vlan_id;
 901                 pmksa_cache_to_eapol_data(pmksa, sta->eapol_sm);
 902                 if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
 903                         sta->vlan_id = 0;
 904                 ap_sta_bind_vlan(hapd, sta, old_vlanid);
 905         } else {
 906                 if (reassoc) {
 907                         /*
 908                          * Force EAPOL state machines to start
 909                          * re-authentication without having to wait for the
 910                          * Supplicant to send EAPOL-Start.
 911                          */
 912                         sta->eapol_sm->reAuthenticate = TRUE;
 913                 }
 914                 eapol_auth_step(sta->eapol_sm);
 915         }
 916 }
 917
 918
 919 void ieee802_1x_free_station(struct sta_info *sta)
 920 {
 921         struct eapol_state_machine *sm = sta->eapol_sm;
 922
 923         if (sm == NULL)
 924                 return;
 925
 926         sta->eapol_sm = NULL;
 927
 928 #ifndef CONFIG_NO_RADIUS
 929         radius_msg_free(sm->last_recv_radius);
 930         radius_free_class(&sm->radius_class);
 931 #endif /* CONFIG_NO_RADIUS */
 932
 933         os_free(sm->identity);
 934         eapol_auth_free(sm);
 935 }
 936
 937
 938 #ifndef CONFIG_NO_RADIUS
 939 static void ieee802_1x_decapsulate_radius(struct hostapd_data *hapd,
 940                                           struct sta_info *sta)
 941 {
 942         u8 *eap;
 943         size_t len;
 944         struct eap_hdr *hdr;
 945         int eap_type = -1;
 946         char buf[64];
 947         struct radius_msg *msg;
 948         struct eapol_state_machine *sm = sta->eapol_sm;
 949
 950         if (sm == NULL || sm->last_recv_radius == NULL) {
 951                 if (sm)
 952                         sm->eap_if->aaaEapNoReq = TRUE;
 953                 return;
 954         }
 955
 956         msg = sm->last_recv_radius;
 957
 958         eap = radius_msg_get_eap(msg, &len);
 959         if (eap == NULL) {
 960                 /* RFC 3579, Chap. 2.6.3:
 961                  * RADIUS server SHOULD NOT send Access-Reject/no EAP-Message
 962                  * attribute */
 963                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 964                                HOSTAPD_LEVEL_WARNING, "could not extract "
 965                                "EAP-Message from RADIUS message");
 966                 sm->eap_if->aaaEapNoReq = TRUE;
 967                 return;
 968         }
 969
 970         if (len < sizeof(*hdr)) {
 971                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 972                                HOSTAPD_LEVEL_WARNING, "too short EAP packet "
 973                                "received from authentication server");
 974                 os_free(eap);
 975                 sm->eap_if->aaaEapNoReq = TRUE;
 976                 return;
 977         }
 978
 979         if (len > sizeof(*hdr))
 980                 eap_type = eap[sizeof(*hdr)];
 981
 982         hdr = (struct eap_hdr *) eap;
 983         switch (hdr->code) {
 984         case EAP_CODE_REQUEST:
 985                 if (eap_type >= 0)
 986                         sm->eap_type_authsrv = eap_type;
 987                 os_snprintf(buf, sizeof(buf), "EAP-Request-%s (%d)",
 988                             eap_type >= 0 ? eap_server_get_name(0, eap_type) :
 989                             "??",
 990                             eap_type);
 991                 break;
 992         case EAP_CODE_RESPONSE:
 993                 os_snprintf(buf, sizeof(buf), "EAP Response-%s (%d)",
 994                             eap_type >= 0 ? eap_server_get_name(0, eap_type) :
 995                             "??",
 996                             eap_type);
 997                 break;
 998         case EAP_CODE_SUCCESS:
 999                 os_strlcpy(buf, "EAP Success", sizeof(buf));
1000                 break;
1001         case EAP_CODE_FAILURE:
1002                 os_strlcpy(buf, "EAP Failure", sizeof(buf));
1003                 break;
1004         default:
1005                 os_strlcpy(buf, "unknown EAP code", sizeof(buf));
1006                 break;
1007         }
1008         buf[sizeof(buf) - 1] = '\0';
1009         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1010                        HOSTAPD_LEVEL_DEBUG, "decapsulated EAP packet (code=%d "
1011                        "id=%d len=%d) from RADIUS server: %s",
1012                        hdr->code, hdr->identifier, be_to_host16(hdr->length),
1013                        buf);
1014         sm->eap_if->aaaEapReq = TRUE;
1015
1016         wpabuf_free(sm->eap_if->aaaEapReqData);
1017         sm->eap_if->aaaEapReqData = wpabuf_alloc_ext_data(eap, len);
1018 }
1019
1020
1021 static void ieee802_1x_get_keys(struct hostapd_data *hapd,
1022                                 struct sta_info *sta, struct radius_msg *msg,
1023                                 struct radius_msg *req,
1024                                 const u8 *shared_secret,
1025                                 size_t shared_secret_len)
1026 {
1027         struct radius_ms_mppe_keys *keys;
1028         struct eapol_state_machine *sm = sta->eapol_sm;
1029         if (sm == NULL)
1030                 return;
1031
1032         keys = radius_msg_get_ms_keys(msg, req, shared_secret,
1033                                       shared_secret_len);
1034
1035         if (keys && keys->send && keys->recv) {
1036                 size_t len = keys->send_len + keys->recv_len;
1037                 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Send-Key",
1038                                 keys->send, keys->send_len);
1039                 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Recv-Key",
1040                                 keys->recv, keys->recv_len);
1041
1042                 os_free(sm->eap_if->aaaEapKeyData);
1043                 sm->eap_if->aaaEapKeyData = os_malloc(len);
1044                 if (sm->eap_if->aaaEapKeyData) {
1045                         os_memcpy(sm->eap_if->aaaEapKeyData, keys->recv,
1046                                   keys->recv_len);
1047                         os_memcpy(sm->eap_if->aaaEapKeyData + keys->recv_len,
1048                                   keys->send, keys->send_len);
1049                         sm->eap_if->aaaEapKeyDataLen = len;
1050                         sm->eap_if->aaaEapKeyAvailable = TRUE;
1051                 }
1052         }
1053
1054         if (keys) {
1055                 os_free(keys->send);
1056                 os_free(keys->recv);
1057                 os_free(keys);
1058         }
1059 }
1060
1061
1062 static void ieee802_1x_store_radius_class(struct hostapd_data *hapd,
1063                                           struct sta_info *sta,
1064                                           struct radius_msg *msg)
1065 {
1066         u8 *class;
1067         size_t class_len;
1068         struct eapol_state_machine *sm = sta->eapol_sm;
1069         int count, i;
1070         struct radius_attr_data *nclass;
1071         size_t nclass_count;
1072
1073         if (!hapd->conf->radius->acct_server || hapd->radius == NULL ||
1074             sm == NULL)
1075                 return;
1076
1077         radius_free_class(&sm->radius_class);
1078         count = radius_msg_count_attr(msg, RADIUS_ATTR_CLASS, 1);
1079         if (count <= 0)
1080                 return;
1081
1082         nclass = os_zalloc(count * sizeof(struct radius_attr_data));
1083         if (nclass == NULL)
1084                 return;
1085
1086         nclass_count = 0;
1087
1088         class = NULL;
1089         for (i = 0; i < count; i++) {
1090                 do {
1091                         if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CLASS,
1092                                                     &class, &class_len,
1093                                                     class) < 0) {
1094                                 i = count;
1095                                 break;
1096                         }
1097                 } while (class_len < 1);
1098
1099                 nclass[nclass_count].data = os_malloc(class_len);
1100                 if (nclass[nclass_count].data == NULL)
1101                         break;
1102
1103                 os_memcpy(nclass[nclass_count].data, class, class_len);
1104                 nclass[nclass_count].len = class_len;
1105                 nclass_count++;
1106         }
1107
1108         sm->radius_class.attr = nclass;
1109         sm->radius_class.count = nclass_count;
1110         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Stored %lu RADIUS Class "
1111                    "attributes for " MACSTR,
1112                    (unsigned long) sm->radius_class.count,
1113                    MAC2STR(sta->addr));
1114 }
1115
1116
1117 /* Update sta->identity based on User-Name attribute in Access-Accept */
1118 static void ieee802_1x_update_sta_identity(struct hostapd_data *hapd,
1119                                            struct sta_info *sta,
1120                                            struct radius_msg *msg)
1121 {
1122         u8 *buf, *identity;
1123         size_t len;
1124         struct eapol_state_machine *sm = sta->eapol_sm;
1125
1126         if (sm == NULL)
1127                 return;
1128
1129         if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_USER_NAME, &buf, &len,
1130                                     NULL) < 0)
1131                 return;
1132
1133         identity = os_malloc(len + 1);
1134         if (identity == NULL)
1135                 return;
1136
1137         os_memcpy(identity, buf, len);
1138         identity[len] = '\0';
1139
1140         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1141                        HOSTAPD_LEVEL_DEBUG, "old identity '%s' updated with "
1142                        "User-Name from Access-Accept '%s'",
1143                        sm->identity ? (char *) sm->identity : "N/A",
1144                        (char *) identity);
1145
1146         os_free(sm->identity);
1147         sm->identity = identity;
1148         sm->identity_len = len;
1149 }
1150
1151
1152 struct sta_id_search {
1153         u8 identifier;
1154         struct eapol_state_machine *sm;
1155 };
1156
1157
1158 static int ieee802_1x_select_radius_identifier(struct hostapd_data *hapd,
1159                                                struct sta_info *sta,
1160                                                void *ctx)
1161 {
1162         struct sta_id_search *id_search = ctx;
1163         struct eapol_state_machine *sm = sta->eapol_sm;
1164
1165         if (sm && sm->radius_identifier >= 0 &&
1166             sm->radius_identifier == id_search->identifier) {
1167                 id_search->sm = sm;
1168                 return 1;
1169         }
1170         return 0;
1171 }
1172
1173
1174 static struct eapol_state_machine *
1175 ieee802_1x_search_radius_identifier(struct hostapd_data *hapd, u8 identifier)
1176 {
1177         struct sta_id_search id_search;
1178         id_search.identifier = identifier;
1179         id_search.sm = NULL;
1180         ap_for_each_sta(hapd, ieee802_1x_select_radius_identifier, &id_search);
1181         return id_search.sm;
1182 }
1183
1184
1185 /**
1186  * ieee802_1x_receive_auth - Process RADIUS frames from Authentication Server
1187  * @msg: RADIUS response message
1188  * @req: RADIUS request message
1189  * @shared_secret: RADIUS shared secret
1190  * @shared_secret_len: Length of shared_secret in octets
1191  * @data: Context data (struct hostapd_data *)
1192  * Returns: Processing status
1193  */
1194 static RadiusRxResult
1195 ieee802_1x_receive_auth(struct radius_msg *msg, struct radius_msg *req,
1196                         const u8 *shared_secret, size_t shared_secret_len,
1197                         void *data)
1198 {
1199         struct hostapd_data *hapd = data;
1200         struct sta_info *sta;
1201         u32 session_timeout = 0, termination_action, acct_interim_interval;
1202         int session_timeout_set, old_vlanid = 0;
1203         struct eapol_state_machine *sm;
1204         int override_eapReq = 0;
1205         struct radius_hdr *hdr = radius_msg_get_hdr(msg);
1206
1207         sm = ieee802_1x_search_radius_identifier(hapd, hdr->identifier);
1208         if (sm == NULL) {
1209                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Could not find matching "
1210                            "station for this RADIUS message");
1211                 return RADIUS_RX_UNKNOWN;
1212         }
1213         sta = sm->sta;
1214
1215         /* RFC 2869, Ch. 5.13: valid Message-Authenticator attribute MUST be
1216          * present when packet contains an EAP-Message attribute */
1217         if (hdr->code == RADIUS_CODE_ACCESS_REJECT &&
1218             radius_msg_get_attr(msg, RADIUS_ATTR_MESSAGE_AUTHENTICATOR, NULL,
1219                                 0) < 0 &&
1220             radius_msg_get_attr(msg, RADIUS_ATTR_EAP_MESSAGE, NULL, 0) < 0) {
1221                 wpa_printf(MSG_DEBUG, "Allowing RADIUS Access-Reject without "
1222                            "Message-Authenticator since it does not include "
1223                            "EAP-Message");
1224         } else if (radius_msg_verify(msg, shared_secret, shared_secret_len,
1225                                      req, 1)) {
1226                 printf("Incoming RADIUS packet did not have correct "
1227                        "Message-Authenticator - dropped\n");
1228                 return RADIUS_RX_INVALID_AUTHENTICATOR;
1229         }
1230
1231         if (hdr->code != RADIUS_CODE_ACCESS_ACCEPT &&
1232             hdr->code != RADIUS_CODE_ACCESS_REJECT &&
1233             hdr->code != RADIUS_CODE_ACCESS_CHALLENGE) {
1234                 printf("Unknown RADIUS message code\n");
1235                 return RADIUS_RX_UNKNOWN;
1236         }
1237
1238         sm->radius_identifier = -1;
1239         wpa_printf(MSG_DEBUG, "RADIUS packet matching with station " MACSTR,
1240                    MAC2STR(sta->addr));
1241
1242         radius_msg_free(sm->last_recv_radius);
1243         sm->last_recv_radius = msg;
1244
1245         session_timeout_set =
1246                 !radius_msg_get_attr_int32(msg, RADIUS_ATTR_SESSION_TIMEOUT,
1247                                            &session_timeout);
1248         if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_TERMINATION_ACTION,
1249                                       &termination_action))
1250                 termination_action = RADIUS_TERMINATION_ACTION_DEFAULT;
1251
1252         if (hapd->conf->acct_interim_interval == 0 &&
1253             hdr->code == RADIUS_CODE_ACCESS_ACCEPT &&
1254             radius_msg_get_attr_int32(msg, RADIUS_ATTR_ACCT_INTERIM_INTERVAL,
1255                                       &acct_interim_interval) == 0) {
1256                 if (acct_interim_interval < 60) {
1257                         hostapd_logger(hapd, sta->addr,
1258                                        HOSTAPD_MODULE_IEEE8021X,
1259                                        HOSTAPD_LEVEL_INFO,
1260                                        "ignored too small "
1261                                        "Acct-Interim-Interval %d",
1262                                        acct_interim_interval);
1263                 } else
1264                         sta->acct_interim_interval = acct_interim_interval;
1265         }
1266
1267
1268         switch (hdr->code) {
1269         case RADIUS_CODE_ACCESS_ACCEPT:
1270                 if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
1271                         sta->vlan_id = 0;
1272 #ifndef CONFIG_NO_VLAN
1273                 else {
1274                         old_vlanid = sta->vlan_id;
1275                         sta->vlan_id = radius_msg_get_vlanid(msg);
1276                 }
1277                 if (sta->vlan_id > 0 &&
1278                     hostapd_get_vlan_id_ifname(hapd->conf->vlan,
1279                                                sta->vlan_id)) {
1280                         hostapd_logger(hapd, sta->addr,
1281                                        HOSTAPD_MODULE_RADIUS,
1282                                        HOSTAPD_LEVEL_INFO,
1283                                        "VLAN ID %d", sta->vlan_id);
1284                 } else if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_REQUIRED) {
1285                         sta->eapol_sm->authFail = TRUE;
1286                         hostapd_logger(hapd, sta->addr,
1287                                        HOSTAPD_MODULE_IEEE8021X,
1288                                        HOSTAPD_LEVEL_INFO, "authentication "
1289                                        "server did not include required VLAN "
1290                                        "ID in Access-Accept");
1291                         break;
1292                 }
1293 #endif /* CONFIG_NO_VLAN */
1294
1295                 ap_sta_bind_vlan(hapd, sta, old_vlanid);
1296
1297                 /* RFC 3580, Ch. 3.17 */
1298                 if (session_timeout_set && termination_action ==
1299                     RADIUS_TERMINATION_ACTION_RADIUS_REQUEST) {
1300                         sm->reAuthPeriod = session_timeout;
1301                 } else if (session_timeout_set)
1302                         ap_sta_session_timeout(hapd, sta, session_timeout);
1303
1304                 sm->eap_if->aaaSuccess = TRUE;
1305                 override_eapReq = 1;
1306                 ieee802_1x_get_keys(hapd, sta, msg, req, shared_secret,
1307                                     shared_secret_len);
1308                 ieee802_1x_store_radius_class(hapd, sta, msg);
1309                 ieee802_1x_update_sta_identity(hapd, sta, msg);
1310                 if (sm->eap_if->eapKeyAvailable &&
1311                     wpa_auth_pmksa_add(sta->wpa_sm, sm->eapol_key_crypt,
1312                                        session_timeout_set ?
1313                                        (int) session_timeout : -1, sm) == 0) {
1314                         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
1315                                        HOSTAPD_LEVEL_DEBUG,
1316                                        "Added PMKSA cache entry");
1317                 }
1318                 break;
1319         case RADIUS_CODE_ACCESS_REJECT:
1320                 sm->eap_if->aaaFail = TRUE;
1321                 override_eapReq = 1;
1322                 break;
1323         case RADIUS_CODE_ACCESS_CHALLENGE:
1324                 sm->eap_if->aaaEapReq = TRUE;
1325                 if (session_timeout_set) {
1326                         /* RFC 2869, Ch. 2.3.2; RFC 3580, Ch. 3.17 */
1327                         sm->eap_if->aaaMethodTimeout = session_timeout;
1328                         hostapd_logger(hapd, sm->addr,
1329                                        HOSTAPD_MODULE_IEEE8021X,
1330                                        HOSTAPD_LEVEL_DEBUG,
1331                                        "using EAP timeout of %d seconds (from "
1332                                        "RADIUS)",
1333                                        sm->eap_if->aaaMethodTimeout);
1334                 } else {
1335                         /*
1336                          * Use dynamic retransmission behavior per EAP
1337                          * specification.
1338                          */
1339                         sm->eap_if->aaaMethodTimeout = 0;
1340                 }
1341                 break;
1342         }
1343
1344         ieee802_1x_decapsulate_radius(hapd, sta);
1345         if (override_eapReq)
1346                 sm->eap_if->aaaEapReq = FALSE;
1347
1348         eapol_auth_step(sm);
1349
1350         return RADIUS_RX_QUEUED;
1351 }
1352 #endif /* CONFIG_NO_RADIUS */
1353
1354
1355 void ieee802_1x_abort_auth(struct hostapd_data *hapd, struct sta_info *sta)
1356 {
1357         struct eapol_state_machine *sm = sta->eapol_sm;
1358         if (sm == NULL)
1359                 return;
1360
1361         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1362                        HOSTAPD_LEVEL_DEBUG, "aborting authentication");
1363
1364 #ifndef CONFIG_NO_RADIUS
1365         radius_msg_free(sm->last_recv_radius);
1366         sm->last_recv_radius = NULL;
1367 #endif /* CONFIG_NO_RADIUS */
1368
1369         if (sm->eap_if->eapTimeout) {
1370                 /*
1371                  * Disconnect the STA since it did not reply to the last EAP
1372                  * request and we cannot continue EAP processing (EAP-Failure
1373                  * could only be sent if the EAP peer actually replied).
1374                  */
1375                 sm->eap_if->portEnabled = FALSE;
1376                 hostapd_sta_deauth(hapd, sta->addr,
1377                                    WLAN_REASON_PREV_AUTH_NOT_VALID);
1378                 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC |
1379                                 WLAN_STA_AUTHORIZED);
1380                 eloop_cancel_timeout(ap_handle_timer, hapd, sta);
1381                 eloop_register_timeout(0, 0, ap_handle_timer, hapd, sta);
1382                 sta->timeout_next = STA_REMOVE;
1383         }
1384 }
1385
1386
1387 static int ieee802_1x_rekey_broadcast(struct hostapd_data *hapd)
1388 {
1389         struct eapol_authenticator *eapol = hapd->eapol_auth;
1390
1391         if (hapd->conf->default_wep_key_len < 1)
1392                 return 0;
1393
1394         os_free(eapol->default_wep_key);
1395         eapol->default_wep_key = os_malloc(hapd->conf->default_wep_key_len);
1396         if (eapol->default_wep_key == NULL ||
1397             os_get_random(eapol->default_wep_key,
1398                           hapd->conf->default_wep_key_len)) {
1399                 printf("Could not generate random WEP key.\n");
1400                 os_free(eapol->default_wep_key);
1401                 eapol->default_wep_key = NULL;
1402                 return -1;
1403         }
1404
1405         wpa_hexdump_key(MSG_DEBUG, "IEEE 802.1X: New default WEP key",
1406                         eapol->default_wep_key,
1407                         hapd->conf->default_wep_key_len);
1408
1409         return 0;
1410 }
1411
1412
1413 static int ieee802_1x_sta_key_available(struct hostapd_data *hapd,
1414                                         struct sta_info *sta, void *ctx)
1415 {
1416         if (sta->eapol_sm) {
1417                 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
1418                 eapol_auth_step(sta->eapol_sm);
1419         }
1420         return 0;
1421 }
1422
1423
1424 static void ieee802_1x_rekey(void *eloop_ctx, void *timeout_ctx)
1425 {
1426         struct hostapd_data *hapd = eloop_ctx;
1427         struct eapol_authenticator *eapol = hapd->eapol_auth;
1428
1429         if (eapol->default_wep_key_idx >= 3)
1430                 eapol->default_wep_key_idx =
1431                         hapd->conf->individual_wep_key_len > 0 ? 1 : 0;
1432         else
1433                 eapol->default_wep_key_idx++;
1434
1435         wpa_printf(MSG_DEBUG, "IEEE 802.1X: New default WEP key index %d",
1436                    eapol->default_wep_key_idx);
1437
1438         if (ieee802_1x_rekey_broadcast(hapd)) {
1439                 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1440                                HOSTAPD_LEVEL_WARNING, "failed to generate a "
1441                                "new broadcast key");
1442                 os_free(eapol->default_wep_key);
1443                 eapol->default_wep_key = NULL;
1444                 return;
1445         }
1446
1447         /* TODO: Could setup key for RX here, but change default TX keyid only
1448          * after new broadcast key has been sent to all stations. */
1449         if (hostapd_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP, NULL,
1450                             eapol->default_wep_key_idx, 1, NULL, 0,
1451                             eapol->default_wep_key,
1452                             hapd->conf->default_wep_key_len)) {
1453                 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1454                                HOSTAPD_LEVEL_WARNING, "failed to configure a "
1455                                "new broadcast key");
1456                 os_free(eapol->default_wep_key);
1457                 eapol->default_wep_key = NULL;
1458                 return;
1459         }
1460
1461         ap_for_each_sta(hapd, ieee802_1x_sta_key_available, NULL);
1462
1463         if (hapd->conf->wep_rekeying_period > 0) {
1464                 eloop_register_timeout(hapd->conf->wep_rekeying_period, 0,
1465                                        ieee802_1x_rekey, hapd, NULL);
1466         }
1467 }
1468
1469
1470 static void ieee802_1x_eapol_send(void *ctx, void *sta_ctx, u8 type,
1471                                   const u8 *data, size_t datalen)
1472 {
1473         ieee802_1x_send(ctx, sta_ctx, type, data, datalen);
1474 }
1475
1476
1477 static void ieee802_1x_aaa_send(void *ctx, void *sta_ctx,
1478                                 const u8 *data, size_t datalen)
1479 {
1480 #ifndef CONFIG_NO_RADIUS
1481         struct hostapd_data *hapd = ctx;
1482         struct sta_info *sta = sta_ctx;
1483
1484         ieee802_1x_encapsulate_radius(hapd, sta, data, datalen);
1485 #endif /* CONFIG_NO_RADIUS */
1486 }
1487
1488
1489 static void _ieee802_1x_finished(void *ctx, void *sta_ctx, int success,
1490                                  int preauth)
1491 {
1492         struct hostapd_data *hapd = ctx;
1493         struct sta_info *sta = sta_ctx;
1494         if (preauth)
1495                 rsn_preauth_finished(hapd, sta, success);
1496         else
1497                 ieee802_1x_finished(hapd, sta, success);
1498 }
1499
1500
1501 static int ieee802_1x_get_eap_user(void *ctx, const u8 *identity,
1502                                    size_t identity_len, int phase2,
1503                                    struct eap_user *user)
1504 {
1505         struct hostapd_data *hapd = ctx;
1506         const struct hostapd_eap_user *eap_user;
1507         int i, count;
1508
1509         eap_user = hostapd_get_eap_user(hapd->conf, identity,
1510                                         identity_len, phase2);
1511         if (eap_user == NULL)
1512                 return -1;
1513
1514         os_memset(user, 0, sizeof(*user));
1515         user->phase2 = phase2;
1516         count = EAP_USER_MAX_METHODS;
1517         if (count > EAP_MAX_METHODS)
1518                 count = EAP_MAX_METHODS;
1519         for (i = 0; i < count; i++) {
1520                 user->methods[i].vendor = eap_user->methods[i].vendor;
1521                 user->methods[i].method = eap_user->methods[i].method;
1522         }
1523
1524         if (eap_user->password) {
1525                 user->password = os_malloc(eap_user->password_len);
1526                 if (user->password == NULL)
1527                         return -1;
1528                 os_memcpy(user->password, eap_user->password,
1529                           eap_user->password_len);
1530                 user->password_len = eap_user->password_len;
1531         }
1532         user->force_version = eap_user->force_version;
1533         user->ttls_auth = eap_user->ttls_auth;
1534
1535         return 0;
1536 }
1537
1538
1539 static int ieee802_1x_sta_entry_alive(void *ctx, const u8 *addr)
1540 {
1541         struct hostapd_data *hapd = ctx;
1542         struct sta_info *sta;
1543         sta = ap_get_sta(hapd, addr);
1544         if (sta == NULL || sta->eapol_sm == NULL)
1545                 return 0;
1546         return 1;
1547 }
1548
1549
1550 static void ieee802_1x_logger(void *ctx, const u8 *addr,
1551                               eapol_logger_level level, const char *txt)
1552 {
1553 #ifndef CONFIG_NO_HOSTAPD_LOGGER
1554         struct hostapd_data *hapd = ctx;
1555         int hlevel;
1556
1557         switch (level) {
1558         case EAPOL_LOGGER_WARNING:
1559                 hlevel = HOSTAPD_LEVEL_WARNING;
1560                 break;
1561         case EAPOL_LOGGER_INFO:
1562                 hlevel = HOSTAPD_LEVEL_INFO;
1563                 break;
1564         case EAPOL_LOGGER_DEBUG:
1565         default:
1566                 hlevel = HOSTAPD_LEVEL_DEBUG;
1567                 break;
1568         }
1569
1570         hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE8021X, hlevel, "%s",
1571                        txt);
1572 #endif /* CONFIG_NO_HOSTAPD_LOGGER */
1573 }
1574
1575
1576 static void ieee802_1x_set_port_authorized(void *ctx, void *sta_ctx,
1577                                            int authorized)
1578 {
1579         struct hostapd_data *hapd = ctx;
1580         struct sta_info *sta = sta_ctx;
1581         ieee802_1x_set_sta_authorized(hapd, sta, authorized);
1582 }
1583
1584
1585 static void _ieee802_1x_abort_auth(void *ctx, void *sta_ctx)
1586 {
1587         struct hostapd_data *hapd = ctx;
1588         struct sta_info *sta = sta_ctx;
1589         ieee802_1x_abort_auth(hapd, sta);
1590 }
1591
1592
1593 static void _ieee802_1x_tx_key(void *ctx, void *sta_ctx)
1594 {
1595         struct hostapd_data *hapd = ctx;
1596         struct sta_info *sta = sta_ctx;
1597         ieee802_1x_tx_key(hapd, sta);
1598 }
1599
1600
1601 static void ieee802_1x_eapol_event(void *ctx, void *sta_ctx,
1602                                    enum eapol_event type)
1603 {
1604         /* struct hostapd_data *hapd = ctx; */
1605         struct sta_info *sta = sta_ctx;
1606         switch (type) {
1607         case EAPOL_AUTH_SM_CHANGE:
1608                 wpa_auth_sm_notify(sta->wpa_sm);
1609                 break;
1610         case EAPOL_AUTH_REAUTHENTICATE:
1611                 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
1612                 break;
1613         }
1614 }
1615
1616
1617 int ieee802_1x_init(struct hostapd_data *hapd)
1618 {
1619         int i;
1620         struct eapol_auth_config conf;
1621         struct eapol_auth_cb cb;
1622
1623         os_memset(&conf, 0, sizeof(conf));
1624         conf.ctx = hapd;
1625         conf.eap_reauth_period = hapd->conf->eap_reauth_period;
1626         conf.wpa = hapd->conf->wpa;
1627         conf.individual_wep_key_len = hapd->conf->individual_wep_key_len;
1628         conf.eap_server = hapd->conf->eap_server;
1629         conf.ssl_ctx = hapd->ssl_ctx;
1630         conf.eap_sim_db_priv = hapd->eap_sim_db_priv;
1631         conf.eap_req_id_text = hapd->conf->eap_req_id_text;
1632         conf.eap_req_id_text_len = hapd->conf->eap_req_id_text_len;
1633         conf.pac_opaque_encr_key = hapd->conf->pac_opaque_encr_key;
1634         conf.eap_fast_a_id = hapd->conf->eap_fast_a_id;
1635         conf.eap_fast_a_id_len = hapd->conf->eap_fast_a_id_len;
1636         conf.eap_fast_a_id_info = hapd->conf->eap_fast_a_id_info;
1637         conf.eap_fast_prov = hapd->conf->eap_fast_prov;
1638         conf.pac_key_lifetime = hapd->conf->pac_key_lifetime;
1639         conf.pac_key_refresh_time = hapd->conf->pac_key_refresh_time;
1640         conf.eap_sim_aka_result_ind = hapd->conf->eap_sim_aka_result_ind;
1641         conf.tnc = hapd->conf->tnc;
1642         conf.wps = hapd->wps;
1643
1644         os_memset(&cb, 0, sizeof(cb));
1645         cb.eapol_send = ieee802_1x_eapol_send;
1646         cb.aaa_send = ieee802_1x_aaa_send;
1647         cb.finished = _ieee802_1x_finished;
1648         cb.get_eap_user = ieee802_1x_get_eap_user;
1649         cb.sta_entry_alive = ieee802_1x_sta_entry_alive;
1650         cb.logger = ieee802_1x_logger;
1651         cb.set_port_authorized = ieee802_1x_set_port_authorized;
1652         cb.abort_auth = _ieee802_1x_abort_auth;
1653         cb.tx_key = _ieee802_1x_tx_key;
1654         cb.eapol_event = ieee802_1x_eapol_event;
1655
1656         hapd->eapol_auth = eapol_auth_init(&conf, &cb);
1657         if (hapd->eapol_auth == NULL)
1658                 return -1;
1659
1660         if ((hapd->conf->ieee802_1x || hapd->conf->wpa) &&
1661             hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 1))
1662                 return -1;
1663
1664 #ifndef CONFIG_NO_RADIUS
1665         if (radius_client_register(hapd->radius, RADIUS_AUTH,
1666                                    ieee802_1x_receive_auth, hapd))
1667                 return -1;
1668 #endif /* CONFIG_NO_RADIUS */
1669
1670         if (hapd->conf->default_wep_key_len) {
1671                 hostapd_set_privacy(hapd, 1);
1672
1673                 for (i = 0; i < 4; i++)
1674                         hostapd_set_key(hapd->conf->iface, hapd, WPA_ALG_NONE,
1675                                         NULL, i, 0, NULL, 0, NULL, 0);
1676
1677                 ieee802_1x_rekey(hapd, NULL);
1678
1679                 if (hapd->eapol_auth->default_wep_key == NULL)
1680                         return -1;
1681         }
1682
1683         return 0;
1684 }
1685
1686
1687 void ieee802_1x_deinit(struct hostapd_data *hapd)
1688 {
1689         eloop_cancel_timeout(ieee802_1x_rekey, hapd, NULL);
1690
1691         if (hapd->driver != NULL &&
1692             (hapd->conf->ieee802_1x || hapd->conf->wpa))
1693                 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0);
1694
1695         eapol_auth_deinit(hapd->eapol_auth);
1696         hapd->eapol_auth = NULL;
1697 }
1698
1699
1700 int ieee802_1x_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
1701                          const u8 *buf, size_t len, int ack)
1702 {
1703         struct ieee80211_hdr *hdr;
1704         struct ieee802_1x_hdr *xhdr;
1705         struct ieee802_1x_eapol_key *key;
1706         u8 *pos;
1707         const unsigned char rfc1042_hdr[ETH_ALEN] =
1708                 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
1709
1710         if (sta == NULL)
1711                 return -1;
1712         if (len < sizeof(*hdr) + sizeof(rfc1042_hdr) + 2 + sizeof(*xhdr))
1713                 return 0;
1714
1715         hdr = (struct ieee80211_hdr *) buf;
1716         pos = (u8 *) (hdr + 1);
1717         if (os_memcmp(pos, rfc1042_hdr, sizeof(rfc1042_hdr)) != 0)
1718                 return 0;
1719         pos += sizeof(rfc1042_hdr);
1720         if (WPA_GET_BE16(pos) != ETH_P_PAE)
1721                 return 0;
1722         pos += 2;
1723
1724         xhdr = (struct ieee802_1x_hdr *) pos;
1725         pos += sizeof(*xhdr);
1726
1727         wpa_printf(MSG_DEBUG, "IEEE 802.1X: " MACSTR " TX status - version=%d "
1728                    "type=%d length=%d - ack=%d",
1729                    MAC2STR(sta->addr), xhdr->version, xhdr->type,
1730                    be_to_host16(xhdr->length), ack);
1731
1732         /* EAPOL EAP-Packet packets are eventually re-sent by either Supplicant
1733          * or Authenticator state machines, but EAPOL-Key packets are not
1734          * retransmitted in case of failure. Try to re-sent failed EAPOL-Key
1735          * packets couple of times because otherwise STA keys become
1736          * unsynchronized with AP. */
1737         if (xhdr->type == IEEE802_1X_TYPE_EAPOL_KEY && !ack &&
1738             pos + sizeof(*key) <= buf + len) {
1739                 key = (struct ieee802_1x_eapol_key *) pos;
1740                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1741                                HOSTAPD_LEVEL_DEBUG, "did not Ack EAPOL-Key "
1742                                "frame (%scast index=%d)",
1743                                key->key_index & BIT(7) ? "uni" : "broad",
1744                                key->key_index & ~BIT(7));
1745                 /* TODO: re-send EAPOL-Key couple of times (with short delay
1746                  * between them?). If all attempt fail, report error and
1747                  * deauthenticate STA so that it will get new keys when
1748                  * authenticating again (e.g., after returning in range).
1749                  * Separate limit/transmit state needed both for unicast and
1750                  * broadcast keys(?) */
1751         }
1752         /* TODO: could move unicast key configuration from ieee802_1x_tx_key()
1753          * to here and change the key only if the EAPOL-Key packet was Acked.
1754          */
1755
1756         return 1;
1757 }
1758
1759
1760 u8 * ieee802_1x_get_identity(struct eapol_state_machine *sm, size_t *len)
1761 {
1762         if (sm == NULL || sm->identity == NULL)
1763                 return NULL;
1764
1765         *len = sm->identity_len;
1766         return sm->identity;
1767 }
1768
1769
1770 u8 * ieee802_1x_get_radius_class(struct eapol_state_machine *sm, size_t *len,
1771                                  int idx)
1772 {
1773         if (sm == NULL || sm->radius_class.attr == NULL ||
1774             idx >= (int) sm->radius_class.count)
1775                 return NULL;
1776
1777         *len = sm->radius_class.attr[idx].len;
1778         return sm->radius_class.attr[idx].data;
1779 }
1780
1781
1782 const u8 * ieee802_1x_get_key(struct eapol_state_machine *sm, size_t *len)
1783 {
1784         if (sm == NULL)
1785                 return NULL;
1786
1787         *len = sm->eap_if->eapKeyDataLen;
1788         return sm->eap_if->eapKeyData;
1789 }
1790
1791
1792 void ieee802_1x_notify_port_enabled(struct eapol_state_machine *sm,
1793                                     int enabled)
1794 {
1795         if (sm == NULL)
1796                 return;
1797         sm->eap_if->portEnabled = enabled ? TRUE : FALSE;
1798         eapol_auth_step(sm);
1799 }
1800
1801
1802 void ieee802_1x_notify_port_valid(struct eapol_state_machine *sm,
1803                                   int valid)
1804 {
1805         if (sm == NULL)
1806                 return;
1807         sm->portValid = valid ? TRUE : FALSE;
1808         eapol_auth_step(sm);
1809 }
1810
1811
1812 void ieee802_1x_notify_pre_auth(struct eapol_state_machine *sm, int pre_auth)
1813 {
1814         if (sm == NULL)
1815                 return;
1816         if (pre_auth)
1817                 sm->flags |= EAPOL_SM_PREAUTH;
1818         else
1819                 sm->flags &= ~EAPOL_SM_PREAUTH;
1820 }
1821
1822
1823 static const char * bool_txt(Boolean bool)
1824 {
1825         return bool ? "TRUE" : "FALSE";
1826 }
1827
1828
1829 int ieee802_1x_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
1830 {
1831         /* TODO */
1832         return 0;
1833 }
1834
1835
1836 int ieee802_1x_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
1837                            char *buf, size_t buflen)
1838 {
1839         int len = 0, ret;
1840         struct eapol_state_machine *sm = sta->eapol_sm;
1841
1842         if (sm == NULL)
1843                 return 0;
1844
1845         ret = os_snprintf(buf + len, buflen - len,
1846                           "dot1xPaePortNumber=%d\n"
1847                           "dot1xPaePortProtocolVersion=%d\n"
1848                           "dot1xPaePortCapabilities=1\n"
1849                           "dot1xPaePortInitialize=%d\n"
1850                           "dot1xPaePortReauthenticate=FALSE\n",
1851                           sta->aid,
1852                           EAPOL_VERSION,
1853                           sm->initialize);
1854         if (ret < 0 || (size_t) ret >= buflen - len)
1855                 return len;
1856         len += ret;
1857
1858         /* dot1xAuthConfigTable */
1859         ret = os_snprintf(buf + len, buflen - len,
1860                           "dot1xAuthPaeState=%d\n"
1861                           "dot1xAuthBackendAuthState=%d\n"
1862                           "dot1xAuthAdminControlledDirections=%d\n"
1863                           "dot1xAuthOperControlledDirections=%d\n"
1864                           "dot1xAuthAuthControlledPortStatus=%d\n"
1865                           "dot1xAuthAuthControlledPortControl=%d\n"
1866                           "dot1xAuthQuietPeriod=%u\n"
1867                           "dot1xAuthServerTimeout=%u\n"
1868                           "dot1xAuthReAuthPeriod=%u\n"
1869                           "dot1xAuthReAuthEnabled=%s\n"
1870                           "dot1xAuthKeyTxEnabled=%s\n",
1871                           sm->auth_pae_state + 1,
1872                           sm->be_auth_state + 1,
1873                           sm->adminControlledDirections,
1874                           sm->operControlledDirections,
1875                           sm->authPortStatus,
1876                           sm->portControl,
1877                           sm->quietPeriod,
1878                           sm->serverTimeout,
1879                           sm->reAuthPeriod,
1880                           bool_txt(sm->reAuthEnabled),
1881                           bool_txt(sm->keyTxEnabled));
1882         if (ret < 0 || (size_t) ret >= buflen - len)
1883                 return len;
1884         len += ret;
1885
1886         /* dot1xAuthStatsTable */
1887         ret = os_snprintf(buf + len, buflen - len,
1888                           "dot1xAuthEapolFramesRx=%u\n"
1889                           "dot1xAuthEapolFramesTx=%u\n"
1890                           "dot1xAuthEapolStartFramesRx=%u\n"
1891                           "dot1xAuthEapolLogoffFramesRx=%u\n"
1892                           "dot1xAuthEapolRespIdFramesRx=%u\n"
1893                           "dot1xAuthEapolRespFramesRx=%u\n"
1894                           "dot1xAuthEapolReqIdFramesTx=%u\n"
1895                           "dot1xAuthEapolReqFramesTx=%u\n"
1896                           "dot1xAuthInvalidEapolFramesRx=%u\n"
1897                           "dot1xAuthEapLengthErrorFramesRx=%u\n"
1898                           "dot1xAuthLastEapolFrameVersion=%u\n"
1899                           "dot1xAuthLastEapolFrameSource=" MACSTR "\n",
1900                           sm->dot1xAuthEapolFramesRx,
1901                           sm->dot1xAuthEapolFramesTx,
1902                           sm->dot1xAuthEapolStartFramesRx,
1903                           sm->dot1xAuthEapolLogoffFramesRx,
1904                           sm->dot1xAuthEapolRespIdFramesRx,
1905                           sm->dot1xAuthEapolRespFramesRx,
1906                           sm->dot1xAuthEapolReqIdFramesTx,
1907                           sm->dot1xAuthEapolReqFramesTx,
1908                           sm->dot1xAuthInvalidEapolFramesRx,
1909                           sm->dot1xAuthEapLengthErrorFramesRx,
1910                           sm->dot1xAuthLastEapolFrameVersion,
1911                           MAC2STR(sm->addr));
1912         if (ret < 0 || (size_t) ret >= buflen - len)
1913                 return len;
1914         len += ret;
1915
1916         /* dot1xAuthDiagTable */
1917         ret = os_snprintf(buf + len, buflen - len,
1918                           "dot1xAuthEntersConnecting=%u\n"
1919                           "dot1xAuthEapLogoffsWhileConnecting=%u\n"
1920                           "dot1xAuthEntersAuthenticating=%u\n"
1921                           "dot1xAuthAuthSuccessesWhileAuthenticating=%u\n"
1922                           "dot1xAuthAuthTimeoutsWhileAuthenticating=%u\n"
1923                           "dot1xAuthAuthFailWhileAuthenticating=%u\n"
1924                           "dot1xAuthAuthEapStartsWhileAuthenticating=%u\n"
1925                           "dot1xAuthAuthEapLogoffWhileAuthenticating=%u\n"
1926                           "dot1xAuthAuthReauthsWhileAuthenticated=%u\n"
1927                           "dot1xAuthAuthEapStartsWhileAuthenticated=%u\n"
1928                           "dot1xAuthAuthEapLogoffWhileAuthenticated=%u\n"
1929                           "dot1xAuthBackendResponses=%u\n"
1930                           "dot1xAuthBackendAccessChallenges=%u\n"
1931                           "dot1xAuthBackendOtherRequestsToSupplicant=%u\n"
1932                           "dot1xAuthBackendAuthSuccesses=%u\n"
1933                           "dot1xAuthBackendAuthFails=%u\n",
1934                           sm->authEntersConnecting,
1935                           sm->authEapLogoffsWhileConnecting,
1936                           sm->authEntersAuthenticating,
1937                           sm->authAuthSuccessesWhileAuthenticating,
1938                           sm->authAuthTimeoutsWhileAuthenticating,
1939                           sm->authAuthFailWhileAuthenticating,
1940                           sm->authAuthEapStartsWhileAuthenticating,
1941                           sm->authAuthEapLogoffWhileAuthenticating,
1942                           sm->authAuthReauthsWhileAuthenticated,
1943                           sm->authAuthEapStartsWhileAuthenticated,
1944                           sm->authAuthEapLogoffWhileAuthenticated,
1945                           sm->backendResponses,
1946                           sm->backendAccessChallenges,
1947                           sm->backendOtherRequestsToSupplicant,
1948                           sm->backendAuthSuccesses,
1949                           sm->backendAuthFails);
1950         if (ret < 0 || (size_t) ret >= buflen - len)
1951                 return len;
1952         len += ret;
1953
1954         /* dot1xAuthSessionStatsTable */
1955         ret = os_snprintf(buf + len, buflen - len,
1956                           /* TODO: dot1xAuthSessionOctetsRx */
1957                           /* TODO: dot1xAuthSessionOctetsTx */
1958                           /* TODO: dot1xAuthSessionFramesRx */
1959                           /* TODO: dot1xAuthSessionFramesTx */
1960                           "dot1xAuthSessionId=%08X-%08X\n"
1961                           "dot1xAuthSessionAuthenticMethod=%d\n"
1962                           "dot1xAuthSessionTime=%u\n"
1963                           "dot1xAuthSessionTerminateCause=999\n"
1964                           "dot1xAuthSessionUserName=%s\n",
1965                           sta->acct_session_id_hi, sta->acct_session_id_lo,
1966                           (wpa_key_mgmt_wpa_ieee8021x(
1967                                    wpa_auth_sta_key_mgmt(sta->wpa_sm))) ?
1968                           1 : 2,
1969                           (unsigned int) (time(NULL) -
1970                                           sta->acct_session_start),
1971                           sm->identity);
1972         if (ret < 0 || (size_t) ret >= buflen - len)
1973                 return len;
1974         len += ret;
1975
1976         return len;
1977 }
1978
1979
1980 static void ieee802_1x_finished(struct hostapd_data *hapd,
1981                                 struct sta_info *sta, int success)
1982 {
1983         const u8 *key;
1984         size_t len;
1985         /* TODO: get PMKLifetime from WPA parameters */
1986         static const int dot11RSNAConfigPMKLifetime = 43200;
1987
1988         key = ieee802_1x_get_key(sta->eapol_sm, &len);
1989         if (success && key && len >= PMK_LEN &&
1990             wpa_auth_pmksa_add(sta->wpa_sm, key, dot11RSNAConfigPMKLifetime,
1991                                sta->eapol_sm) == 0) {
1992                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
1993                                HOSTAPD_LEVEL_DEBUG,
1994                                "Added PMKSA cache entry (IEEE 802.1X)");
1995         }
1996 }