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 "hostapd.h"
  18 #include "ieee802_1x.h"
  19 #include "accounting.h"
  20 #include "radius/radius.h"
  21 #include "radius/radius_client.h"
  22 #include "eapol_sm.h"
  23 #include "md5.h"
  24 #include "rc4.h"
  25 #include "eloop.h"
  26 #include "sta_info.h"
  27 #include "wpa.h"
  28 #include "preauth.h"
  29 #include "pmksa_cache.h"
  30 #include "driver.h"
  31 #include "hw_features.h"
  32 #include "eap_server/eap.h"
  33
  34
  35 static void ieee802_1x_finished(struct hostapd_data *hapd,
  36                                 struct sta_info *sta, int success);
  37
  38
  39 static void ieee802_1x_send(struct hostapd_data *hapd, struct sta_info *sta,
  40                             u8 type, const u8 *data, size_t datalen)
  41 {
  42         u8 *buf;
  43         struct ieee802_1x_hdr *xhdr;
  44         size_t len;
  45         int encrypt = 0;
  46
  47         len = sizeof(*xhdr) + datalen;
  48         buf = os_zalloc(len);
  49         if (buf == NULL) {
  50                 wpa_printf(MSG_ERROR, "malloc() failed for "
  51                            "ieee802_1x_send(len=%lu)",
  52                            (unsigned long) len);
  53                 return;
  54         }
  55
  56         xhdr = (struct ieee802_1x_hdr *) buf;
  57         xhdr->version = hapd->conf->eapol_version;
  58         xhdr->type = type;
  59         xhdr->length = host_to_be16(datalen);
  60
  61         if (datalen > 0 && data != NULL)
  62                 os_memcpy(xhdr + 1, data, datalen);
  63
  64         if (wpa_auth_pairwise_set(sta->wpa_sm))
  65                 encrypt = 1;
  66         if (sta->flags & WLAN_STA_PREAUTH) {
  67                 rsn_preauth_send(hapd, sta, buf, len);
  68         } else {
  69                 hostapd_send_eapol(hapd, sta->addr, buf, len, encrypt);
  70         }
  71
  72         os_free(buf);
  73 }
  74
  75
  76 void ieee802_1x_set_sta_authorized(struct hostapd_data *hapd,
  77                                    struct sta_info *sta, int authorized)
  78 {
  79         int res;
  80
  81         if (sta->flags & WLAN_STA_PREAUTH)
  82                 return;
  83
  84         if (authorized) {
  85                 sta->flags |= WLAN_STA_AUTHORIZED;
  86                 res = hostapd_sta_set_flags(hapd, sta->addr, sta->flags,
  87                                             WLAN_STA_AUTHORIZED, ~0);
  88                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
  89                                HOSTAPD_LEVEL_DEBUG, "authorizing port");
  90         } else {
  91                 sta->flags &= ~WLAN_STA_AUTHORIZED;
  92                 res = hostapd_sta_set_flags(hapd, sta->addr, sta->flags,
  93                                             0, ~WLAN_STA_AUTHORIZED);
  94                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
  95                                HOSTAPD_LEVEL_DEBUG, "unauthorizing port");
  96         }
  97
  98         if (res && errno != ENOENT) {
  99                 printf("Could not set station " MACSTR " flags for kernel "
 100                        "driver (errno=%d).\n", MAC2STR(sta->addr), errno);
 101         }
 102
 103         if (authorized)
 104                 accounting_sta_start(hapd, sta);
 105 }
 106
 107
 108 static void ieee802_1x_eap_timeout(void *eloop_ctx, void *timeout_ctx)
 109 {
 110         struct sta_info *sta = eloop_ctx;
 111         struct eapol_state_machine *sm = sta->eapol_sm;
 112         if (sm == NULL)
 113                 return;
 114         hostapd_logger(sm->hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 115                        HOSTAPD_LEVEL_DEBUG, "EAP timeout");
 116         sm->eap_if->eapTimeout = TRUE;
 117         eapol_auth_step(sm);
 118 }
 119
 120
 121 static void ieee802_1x_tx_key_one(struct hostapd_data *hapd,
 122                                   struct sta_info *sta,
 123                                   int idx, int broadcast,
 124                                   u8 *key_data, size_t key_len)
 125 {
 126         u8 *buf, *ekey;
 127         struct ieee802_1x_hdr *hdr;
 128         struct ieee802_1x_eapol_key *key;
 129         size_t len, ekey_len;
 130         struct eapol_state_machine *sm = sta->eapol_sm;
 131
 132         if (sm == NULL)
 133                 return;
 134
 135         len = sizeof(*key) + key_len;
 136         buf = os_zalloc(sizeof(*hdr) + len);
 137         if (buf == NULL)
 138                 return;
 139
 140         hdr = (struct ieee802_1x_hdr *) buf;
 141         key = (struct ieee802_1x_eapol_key *) (hdr + 1);
 142         key->type = EAPOL_KEY_TYPE_RC4;
 143         key->key_length = htons(key_len);
 144         wpa_get_ntp_timestamp(key->replay_counter);
 145
 146         if (os_get_random(key->key_iv, sizeof(key->key_iv))) {
 147                 wpa_printf(MSG_ERROR, "Could not get random numbers");
 148                 os_free(buf);
 149                 return;
 150         }
 151
 152         key->key_index = idx | (broadcast ? 0 : BIT(7));
 153         if (hapd->conf->eapol_key_index_workaround) {
 154                 /* According to some information, WinXP Supplicant seems to
 155                  * interpret bit7 as an indication whether the key is to be
 156                  * activated, so make it possible to enable workaround that
 157                  * sets this bit for all keys. */
 158                 key->key_index |= BIT(7);
 159         }
 160
 161         /* Key is encrypted using "Key-IV + MSK[0..31]" as the RC4-key and
 162          * MSK[32..63] is used to sign the message. */
 163         if (sm->eap_if->eapKeyData == NULL || sm->eap_if->eapKeyDataLen < 64) {
 164                 wpa_printf(MSG_ERROR, "No eapKeyData available for encrypting "
 165                            "and signing EAPOL-Key");
 166                 os_free(buf);
 167                 return;
 168         }
 169         os_memcpy((u8 *) (key + 1), key_data, key_len);
 170         ekey_len = sizeof(key->key_iv) + 32;
 171         ekey = os_malloc(ekey_len);
 172         if (ekey == NULL) {
 173                 wpa_printf(MSG_ERROR, "Could not encrypt key");
 174                 os_free(buf);
 175                 return;
 176         }
 177         os_memcpy(ekey, key->key_iv, sizeof(key->key_iv));
 178         os_memcpy(ekey + sizeof(key->key_iv), sm->eap_if->eapKeyData, 32);
 179         rc4((u8 *) (key + 1), key_len, ekey, ekey_len);
 180         os_free(ekey);
 181
 182         /* This header is needed here for HMAC-MD5, but it will be regenerated
 183          * in ieee802_1x_send() */
 184         hdr->version = hapd->conf->eapol_version;
 185         hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
 186         hdr->length = host_to_be16(len);
 187         hmac_md5(sm->eap_if->eapKeyData + 32, 32, buf, sizeof(*hdr) + len,
 188                  key->key_signature);
 189
 190         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key to " MACSTR
 191                    " (%s index=%d)", MAC2STR(sm->addr),
 192                    broadcast ? "broadcast" : "unicast", idx);
 193         ieee802_1x_send(hapd, sta, IEEE802_1X_TYPE_EAPOL_KEY, (u8 *) key, len);
 194         if (sta->eapol_sm)
 195                 sta->eapol_sm->dot1xAuthEapolFramesTx++;
 196         os_free(buf);
 197 }
 198
 199
 200 static struct hostapd_wep_keys *
 201 ieee802_1x_group_alloc(struct hostapd_data *hapd, const char *ifname)
 202 {
 203         struct hostapd_wep_keys *key;
 204
 205         key = os_zalloc(sizeof(*key));
 206         if (key == NULL)
 207                 return NULL;
 208
 209         key->default_len = hapd->conf->default_wep_key_len;
 210
 211         if (key->idx >= hapd->conf->broadcast_key_idx_max ||
 212             key->idx < hapd->conf->broadcast_key_idx_min)
 213                 key->idx = hapd->conf->broadcast_key_idx_min;
 214         else
 215                 key->idx++;
 216
 217         if (!key->key[key->idx])
 218                 key->key[key->idx] = os_malloc(key->default_len);
 219         if (key->key[key->idx] == NULL ||
 220             os_get_random(key->key[key->idx], key->default_len)) {
 221                 printf("Could not generate random WEP key (dynamic VLAN).\n");
 222                 os_free(key->key[key->idx]);
 223                 key->key[key->idx] = NULL;
 224                 os_free(key);
 225                 return NULL;
 226         }
 227         key->len[key->idx] = key->default_len;
 228
 229         wpa_printf(MSG_DEBUG, "%s: Default WEP idx %d for dynamic VLAN\n",
 230                    ifname, key->idx);
 231         wpa_hexdump_key(MSG_DEBUG, "Default WEP key (dynamic VLAN)",
 232                         key->key[key->idx], key->len[key->idx]);
 233
 234         if (hostapd_set_encryption(ifname, hapd, "WEP", NULL, key->idx,
 235                                    key->key[key->idx], key->len[key->idx], 1))
 236                 printf("Could not set dynamic VLAN WEP encryption key.\n");
 237
 238         hostapd_set_ieee8021x(ifname, hapd, 1);
 239
 240         return key;
 241 }
 242
 243
 244 static struct hostapd_wep_keys *
 245 ieee802_1x_get_group(struct hostapd_data *hapd, struct hostapd_ssid *ssid,
 246                      size_t vlan_id)
 247 {
 248         const char *ifname;
 249
 250         if (vlan_id == 0)
 251                 return &ssid->wep;
 252
 253         if (vlan_id <= ssid->max_dyn_vlan_keys && ssid->dyn_vlan_keys &&
 254             ssid->dyn_vlan_keys[vlan_id])
 255                 return ssid->dyn_vlan_keys[vlan_id];
 256
 257         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Creating new group "
 258                    "state machine for VLAN ID %lu",
 259                    (unsigned long) vlan_id);
 260
 261         ifname = hostapd_get_vlan_id_ifname(hapd->conf->vlan, vlan_id);
 262         if (ifname == NULL) {
 263                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Unknown VLAN ID %lu - "
 264                            "cannot create group key state machine",
 265                            (unsigned long) vlan_id);
 266                 return NULL;
 267         }
 268
 269         if (ssid->dyn_vlan_keys == NULL) {
 270                 int size = (vlan_id + 1) * sizeof(ssid->dyn_vlan_keys[0]);
 271                 ssid->dyn_vlan_keys = os_zalloc(size);
 272                 if (ssid->dyn_vlan_keys == NULL)
 273                         return NULL;
 274                 ssid->max_dyn_vlan_keys = vlan_id;
 275         }
 276
 277         if (ssid->max_dyn_vlan_keys < vlan_id) {
 278                 struct hostapd_wep_keys **na;
 279                 int size = (vlan_id + 1) * sizeof(ssid->dyn_vlan_keys[0]);
 280                 na = os_realloc(ssid->dyn_vlan_keys, size);
 281                 if (na == NULL)
 282                         return NULL;
 283                 ssid->dyn_vlan_keys = na;
 284                 os_memset(&ssid->dyn_vlan_keys[ssid->max_dyn_vlan_keys + 1], 0,
 285                           (vlan_id - ssid->max_dyn_vlan_keys) *
 286                           sizeof(ssid->dyn_vlan_keys[0]));
 287                 ssid->max_dyn_vlan_keys = vlan_id;
 288         }
 289
 290         ssid->dyn_vlan_keys[vlan_id] = ieee802_1x_group_alloc(hapd, ifname);
 291
 292         return ssid->dyn_vlan_keys[vlan_id];
 293 }
 294
 295
 296 void ieee802_1x_tx_key(struct hostapd_data *hapd, struct sta_info *sta)
 297 {
 298         struct hostapd_wep_keys *key = NULL;
 299         struct eapol_state_machine *sm = sta->eapol_sm;
 300         int vlan_id;
 301
 302         if (sm == NULL || !sm->eap_if->eapKeyData)
 303                 return;
 304
 305         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key(s) to " MACSTR,
 306                    MAC2STR(sta->addr));
 307
 308         vlan_id = sta->vlan_id;
 309         if (vlan_id < 0 || vlan_id > MAX_VLAN_ID)
 310                 vlan_id = 0;
 311
 312         if (vlan_id) {
 313                 key = ieee802_1x_get_group(hapd, sta->ssid, vlan_id);
 314                 if (key && key->key[key->idx])
 315                         ieee802_1x_tx_key_one(hapd, sta, key->idx, 1,
 316                                               key->key[key->idx],
 317                                               key->len[key->idx]);
 318         } else if (hapd->default_wep_key) {
 319                 ieee802_1x_tx_key_one(hapd, sta, hapd->default_wep_key_idx, 1,
 320                                       hapd->default_wep_key,
 321                                       hapd->conf->default_wep_key_len);
 322         }
 323
 324         if (hapd->conf->individual_wep_key_len > 0) {
 325                 u8 *ikey;
 326                 ikey = os_malloc(hapd->conf->individual_wep_key_len);
 327                 if (ikey == NULL ||
 328                     os_get_random(ikey, hapd->conf->individual_wep_key_len)) {
 329                         wpa_printf(MSG_ERROR, "Could not generate random "
 330                                    "individual WEP key.");
 331                         os_free(ikey);
 332                         return;
 333                 }
 334
 335                 wpa_hexdump_key(MSG_DEBUG, "Individual WEP key",
 336                                 ikey, hapd->conf->individual_wep_key_len);
 337
 338                 ieee802_1x_tx_key_one(hapd, sta, 0, 0, ikey,
 339                                       hapd->conf->individual_wep_key_len);
 340
 341                 /* TODO: set encryption in TX callback, i.e., only after STA
 342                  * has ACKed EAPOL-Key frame */
 343                 if (hostapd_set_encryption(hapd->conf->iface, hapd, "WEP",
 344                                            sta->addr, 0, ikey,
 345                                            hapd->conf->individual_wep_key_len,
 346                                            1)) {
 347                         wpa_printf(MSG_ERROR, "Could not set individual WEP "
 348                                    "encryption.");
 349                 }
 350
 351                 os_free(ikey);
 352         }
 353 }
 354
 355
 356 const char *radius_mode_txt(struct hostapd_data *hapd)
 357 {
 358         if (hapd->iface->current_mode == NULL)
 359                 return "802.11";
 360
 361         switch (hapd->iface->current_mode->mode) {
 362         case HOSTAPD_MODE_IEEE80211A:
 363                 return "802.11a";
 364         case HOSTAPD_MODE_IEEE80211G:
 365                 return "802.11g";
 366         case HOSTAPD_MODE_IEEE80211B:
 367         default:
 368                 return "802.11b";
 369         }
 370 }
 371
 372
 373 int radius_sta_rate(struct hostapd_data *hapd, struct sta_info *sta)
 374 {
 375         int i;
 376         u8 rate = 0;
 377
 378         for (i = 0; i < sta->supported_rates_len; i++)
 379                 if ((sta->supported_rates[i] & 0x7f) > rate)
 380                         rate = sta->supported_rates[i] & 0x7f;
 381
 382         return rate;
 383 }
 384
 385
 386 static void ieee802_1x_learn_identity(struct hostapd_data *hapd,
 387                                       struct eapol_state_machine *sm,
 388                                       const u8 *eap, size_t len)
 389 {
 390         const u8 *identity;
 391         size_t identity_len;
 392
 393         if (len <= sizeof(struct eap_hdr) ||
 394             eap[sizeof(struct eap_hdr)] != EAP_TYPE_IDENTITY)
 395                 return;
 396
 397         identity = eap_get_identity(sm->eap, &identity_len);
 398         if (identity == NULL)
 399                 return;
 400
 401         /* Save station identity for future RADIUS packets */
 402         os_free(sm->identity);
 403         sm->identity = os_malloc(identity_len + 1);
 404         if (sm->identity == NULL) {
 405                 sm->identity_len = 0;
 406                 return;
 407         }
 408
 409         os_memcpy(sm->identity, identity, identity_len);
 410         sm->identity_len = identity_len;
 411         sm->identity[identity_len] = '\0';
 412         hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
 413                        HOSTAPD_LEVEL_DEBUG, "STA identity '%s'", sm->identity);
 414         sm->dot1xAuthEapolRespIdFramesRx++;
 415 }
 416
 417
 418 static void ieee802_1x_encapsulate_radius(struct hostapd_data *hapd,
 419                                           struct sta_info *sta,
 420                                           const u8 *eap, size_t len)
 421 {
 422         struct radius_msg *msg;
 423         char buf[128];
 424         struct eapol_state_machine *sm = sta->eapol_sm;
 425
 426         if (sm == NULL)
 427                 return;
 428
 429         ieee802_1x_learn_identity(hapd, sm, eap, len);
 430
 431         wpa_printf(MSG_DEBUG, "Encapsulating EAP message into a RADIUS "
 432                    "packet");
 433
 434         sm->radius_identifier = radius_client_get_id(hapd->radius);
 435         msg = radius_msg_new(RADIUS_CODE_ACCESS_REQUEST,
 436                              sm->radius_identifier);
 437         if (msg == NULL) {
 438                 printf("Could not create net RADIUS packet\n");
 439                 return;
 440         }
 441
 442         radius_msg_make_authenticator(msg, (u8 *) sta, sizeof(*sta));
 443
 444         if (sm->identity &&
 445             !radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME,
 446                                  sm->identity, sm->identity_len)) {
 447                 printf("Could not add User-Name\n");
 448                 goto fail;
 449         }
 450
 451         if (hapd->conf->own_ip_addr.af == AF_INET &&
 452             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS,
 453                                  (u8 *) &hapd->conf->own_ip_addr.u.v4, 4)) {
 454                 printf("Could not add NAS-IP-Address\n");
 455                 goto fail;
 456         }
 457
 458 #ifdef CONFIG_IPV6
 459         if (hapd->conf->own_ip_addr.af == AF_INET6 &&
 460             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IPV6_ADDRESS,
 461                                  (u8 *) &hapd->conf->own_ip_addr.u.v6, 16)) {
 462                 printf("Could not add NAS-IPv6-Address\n");
 463                 goto fail;
 464         }
 465 #endif /* CONFIG_IPV6 */
 466
 467         if (hapd->conf->nas_identifier &&
 468             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IDENTIFIER,
 469                                  (u8 *) hapd->conf->nas_identifier,
 470                                  os_strlen(hapd->conf->nas_identifier))) {
 471                 printf("Could not add NAS-Identifier\n");
 472                 goto fail;
 473         }
 474
 475         if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT, sta->aid)) {
 476                 printf("Could not add NAS-Port\n");
 477                 goto fail;
 478         }
 479
 480         os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT ":%s",
 481                     MAC2STR(hapd->own_addr), hapd->conf->ssid.ssid);
 482         buf[sizeof(buf) - 1] = '\0';
 483         if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLED_STATION_ID,
 484                                  (u8 *) buf, os_strlen(buf))) {
 485                 printf("Could not add Called-Station-Id\n");
 486                 goto fail;
 487         }
 488
 489         os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
 490                     MAC2STR(sta->addr));
 491         buf[sizeof(buf) - 1] = '\0';
 492         if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID,
 493                                  (u8 *) buf, os_strlen(buf))) {
 494                 printf("Could not add Calling-Station-Id\n");
 495                 goto fail;
 496         }
 497
 498         /* TODO: should probably check MTU from driver config; 2304 is max for
 499          * IEEE 802.11, but use 1400 to avoid problems with too large packets
 500          */
 501         if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_FRAMED_MTU, 1400)) {
 502                 printf("Could not add Framed-MTU\n");
 503                 goto fail;
 504         }
 505
 506         if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT_TYPE,
 507                                        RADIUS_NAS_PORT_TYPE_IEEE_802_11)) {
 508                 printf("Could not add NAS-Port-Type\n");
 509                 goto fail;
 510         }
 511
 512         if (sta->flags & WLAN_STA_PREAUTH) {
 513                 os_strlcpy(buf, "IEEE 802.11i Pre-Authentication",
 514                            sizeof(buf));
 515         } else {
 516                 os_snprintf(buf, sizeof(buf), "CONNECT %d%sMbps %s",
 517                             radius_sta_rate(hapd, sta) / 2,
 518                             (radius_sta_rate(hapd, sta) & 1) ? ".5" : "",
 519                             radius_mode_txt(hapd));
 520                 buf[sizeof(buf) - 1] = '\0';
 521         }
 522         if (!radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO,
 523                                  (u8 *) buf, os_strlen(buf))) {
 524                 printf("Could not add Connect-Info\n");
 525                 goto fail;
 526         }
 527
 528         if (eap && !radius_msg_add_eap(msg, eap, len)) {
 529                 printf("Could not add EAP-Message\n");
 530                 goto fail;
 531         }
 532
 533         /* State attribute must be copied if and only if this packet is
 534          * Access-Request reply to the previous Access-Challenge */
 535         if (sm->last_recv_radius && sm->last_recv_radius->hdr->code ==
 536             RADIUS_CODE_ACCESS_CHALLENGE) {
 537                 int res = radius_msg_copy_attr(msg, sm->last_recv_radius,
 538                                                RADIUS_ATTR_STATE);
 539                 if (res < 0) {
 540                         printf("Could not copy State attribute from previous "
 541                                "Access-Challenge\n");
 542                         goto fail;
 543                 }
 544                 if (res > 0) {
 545                         wpa_printf(MSG_DEBUG, "Copied RADIUS State Attribute");
 546                 }
 547         }
 548
 549         radius_client_send(hapd->radius, msg, RADIUS_AUTH, sta->addr);
 550         return;
 551
 552  fail:
 553         radius_msg_free(msg);
 554         os_free(msg);
 555 }
 556
 557
 558 char *eap_type_text(u8 type)
 559 {
 560         switch (type) {
 561         case EAP_TYPE_IDENTITY: return "Identity";
 562         case EAP_TYPE_NOTIFICATION: return "Notification";
 563         case EAP_TYPE_NAK: return "Nak";
 564         case EAP_TYPE_MD5: return "MD5-Challenge";
 565         case EAP_TYPE_OTP: return "One-Time Password";
 566         case EAP_TYPE_GTC: return "Generic Token Card";
 567         case EAP_TYPE_TLS: return "TLS";
 568         case EAP_TYPE_TTLS: return "TTLS";
 569         case EAP_TYPE_PEAP: return "PEAP";
 570         case EAP_TYPE_SIM: return "SIM";
 571         case EAP_TYPE_FAST: return "FAST";
 572         case EAP_TYPE_SAKE: return "SAKE";
 573         case EAP_TYPE_PSK: return "PSK";
 574         case EAP_TYPE_PAX: return "PAX";
 575         default: return "Unknown";
 576         }
 577 }
 578
 579
 580 static void handle_eap_response(struct hostapd_data *hapd,
 581                                 struct sta_info *sta, struct eap_hdr *eap,
 582                                 size_t len)
 583 {
 584         u8 type, *data;
 585         struct eapol_state_machine *sm = sta->eapol_sm;
 586         if (sm == NULL)
 587                 return;
 588
 589         data = (u8 *) (eap + 1);
 590
 591         if (len < sizeof(*eap) + 1) {
 592                 printf("handle_eap_response: too short response data\n");
 593                 return;
 594         }
 595
 596         sm->eap_type_supp = type = data[0];
 597         eloop_cancel_timeout(ieee802_1x_eap_timeout, sta, NULL);
 598
 599         hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
 600                        HOSTAPD_LEVEL_DEBUG, "received EAP packet (code=%d "
 601                        "id=%d len=%d) from STA: EAP Response-%s (%d)",
 602                        eap->code, eap->identifier, be_to_host16(eap->length),
 603                        eap_type_text(type), type);
 604
 605         sm->dot1xAuthEapolRespFramesRx++;
 606
 607         wpabuf_free(sm->eap_if->eapRespData);
 608         sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len);
 609         sm->eapolEap = TRUE;
 610 }
 611
 612
 613 /* Process incoming EAP packet from Supplicant */
 614 static void handle_eap(struct hostapd_data *hapd, struct sta_info *sta,
 615                        u8 *buf, size_t len)
 616 {
 617         struct eap_hdr *eap;
 618         u16 eap_len;
 619
 620         if (len < sizeof(*eap)) {
 621                 printf("   too short EAP packet\n");
 622                 return;
 623         }
 624
 625         eap = (struct eap_hdr *) buf;
 626
 627         eap_len = be_to_host16(eap->length);
 628         wpa_printf(MSG_DEBUG, "EAP: code=%d identifier=%d length=%d",
 629                    eap->code, eap->identifier, eap_len);
 630         if (eap_len < sizeof(*eap)) {
 631                 wpa_printf(MSG_DEBUG, "   Invalid EAP length");
 632                 return;
 633         } else if (eap_len > len) {
 634                 wpa_printf(MSG_DEBUG, "   Too short frame to contain this EAP "
 635                            "packet");
 636                 return;
 637         } else if (eap_len < len) {
 638                 wpa_printf(MSG_DEBUG, "   Ignoring %lu extra bytes after EAP "
 639                            "packet", (unsigned long) len - eap_len);
 640         }
 641
 642         switch (eap->code) {
 643         case EAP_CODE_REQUEST:
 644                 wpa_printf(MSG_DEBUG, " (request)");
 645                 return;
 646         case EAP_CODE_RESPONSE:
 647                 wpa_printf(MSG_DEBUG, " (response)");
 648                 handle_eap_response(hapd, sta, eap, eap_len);
 649                 break;
 650         case EAP_CODE_SUCCESS:
 651                 wpa_printf(MSG_DEBUG, " (success)");
 652                 return;
 653         case EAP_CODE_FAILURE:
 654                 wpa_printf(MSG_DEBUG, " (failure)");
 655                 return;
 656         default:
 657                 wpa_printf(MSG_DEBUG, " (unknown code)");
 658                 return;
 659         }
 660 }
 661
 662
 663 /* Process the EAPOL frames from the Supplicant */
 664 void ieee802_1x_receive(struct hostapd_data *hapd, const u8 *sa, const u8 *buf,
 665                         size_t len)
 666 {
 667         struct sta_info *sta;
 668         struct ieee802_1x_hdr *hdr;
 669         struct ieee802_1x_eapol_key *key;
 670         u16 datalen;
 671         struct rsn_pmksa_cache_entry *pmksa;
 672
 673         if (!hapd->conf->ieee802_1x && !hapd->conf->wpa)
 674                 return;
 675
 676         wpa_printf(MSG_DEBUG, "IEEE 802.1X: %lu bytes from " MACSTR,
 677                    (unsigned long) len, MAC2STR(sa));
 678         sta = ap_get_sta(hapd, sa);
 679         if (!sta) {
 680                 printf("   no station information available\n");
 681                 return;
 682         }
 683
 684         if (len < sizeof(*hdr)) {
 685                 printf("   too short IEEE 802.1X packet\n");
 686                 return;
 687         }
 688
 689         hdr = (struct ieee802_1x_hdr *) buf;
 690         datalen = be_to_host16(hdr->length);
 691         wpa_printf(MSG_DEBUG, "   IEEE 802.1X: version=%d type=%d length=%d",
 692                    hdr->version, hdr->type, datalen);
 693
 694         if (len - sizeof(*hdr) < datalen) {
 695                 printf("   frame too short for this IEEE 802.1X packet\n");
 696                 if (sta->eapol_sm)
 697                         sta->eapol_sm->dot1xAuthEapLengthErrorFramesRx++;
 698                 return;
 699         }
 700         if (len - sizeof(*hdr) > datalen) {
 701                 wpa_printf(MSG_DEBUG, "   ignoring %lu extra octets after "
 702                            "IEEE 802.1X packet",
 703                            (unsigned long) len - sizeof(*hdr) - datalen);
 704         }
 705
 706         if (sta->eapol_sm) {
 707                 sta->eapol_sm->dot1xAuthLastEapolFrameVersion = hdr->version;
 708                 sta->eapol_sm->dot1xAuthEapolFramesRx++;
 709         }
 710
 711         key = (struct ieee802_1x_eapol_key *) (hdr + 1);
 712         if (datalen >= sizeof(struct ieee802_1x_eapol_key) &&
 713             hdr->type == IEEE802_1X_TYPE_EAPOL_KEY &&
 714             (key->type == EAPOL_KEY_TYPE_WPA ||
 715              key->type == EAPOL_KEY_TYPE_RSN)) {
 716                 wpa_receive(hapd->wpa_auth, sta->wpa_sm, (u8 *) hdr,
 717                             sizeof(*hdr) + datalen);
 718                 return;
 719         }
 720
 721         if (!hapd->conf->ieee802_1x ||
 722             wpa_auth_sta_key_mgmt(sta->wpa_sm) == WPA_KEY_MGMT_PSK ||
 723             wpa_auth_sta_key_mgmt(sta->wpa_sm) == WPA_KEY_MGMT_FT_PSK)
 724                 return;
 725
 726         if (!sta->eapol_sm) {
 727                 sta->eapol_sm = eapol_auth_alloc(hapd->eapol_auth, sta->addr,
 728                                                  sta->flags & WLAN_STA_PREAUTH,
 729                                                  sta);
 730                 if (!sta->eapol_sm)
 731                         return;
 732         }
 733
 734         /* since we support version 1, we can ignore version field and proceed
 735          * as specified in version 1 standard [IEEE Std 802.1X-2001, 7.5.5] */
 736         /* TODO: actually, we are not version 1 anymore.. However, Version 2
 737          * does not change frame contents, so should be ok to process frames
 738          * more or less identically. Some changes might be needed for
 739          * verification of fields. */
 740
 741         switch (hdr->type) {
 742         case IEEE802_1X_TYPE_EAP_PACKET:
 743                 handle_eap(hapd, sta, (u8 *) (hdr + 1), datalen);
 744                 break;
 745
 746         case IEEE802_1X_TYPE_EAPOL_START:
 747                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 748                                HOSTAPD_LEVEL_DEBUG, "received EAPOL-Start "
 749                                "from STA");
 750                 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
 751                 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
 752                 if (pmksa) {
 753                         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
 754                                        HOSTAPD_LEVEL_DEBUG, "cached PMKSA "
 755                                        "available - ignore it since "
 756                                        "STA sent EAPOL-Start");
 757                         wpa_auth_sta_clear_pmksa(sta->wpa_sm, pmksa);
 758                 }
 759                 sta->eapol_sm->eapolStart = TRUE;
 760                 sta->eapol_sm->dot1xAuthEapolStartFramesRx++;
 761                 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
 762                 break;
 763
 764         case IEEE802_1X_TYPE_EAPOL_LOGOFF:
 765                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 766                                HOSTAPD_LEVEL_DEBUG, "received EAPOL-Logoff "
 767                                "from STA");
 768                 sta->acct_terminate_cause =
 769                         RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
 770                 sta->eapol_sm->eapolLogoff = TRUE;
 771                 sta->eapol_sm->dot1xAuthEapolLogoffFramesRx++;
 772                 break;
 773
 774         case IEEE802_1X_TYPE_EAPOL_KEY:
 775                 wpa_printf(MSG_DEBUG, "   EAPOL-Key");
 776                 if (!(sta->flags & WLAN_STA_AUTHORIZED)) {
 777                         wpa_printf(MSG_DEBUG, "   Dropped key data from "
 778                                    "unauthorized Supplicant");
 779                         break;
 780                 }
 781                 break;
 782
 783         case IEEE802_1X_TYPE_EAPOL_ENCAPSULATED_ASF_ALERT:
 784                 wpa_printf(MSG_DEBUG, "   EAPOL-Encapsulated-ASF-Alert");
 785                 /* TODO: implement support for this; show data */
 786                 break;
 787
 788         default:
 789                 wpa_printf(MSG_DEBUG, "   unknown IEEE 802.1X packet type");
 790                 sta->eapol_sm->dot1xAuthInvalidEapolFramesRx++;
 791                 break;
 792         }
 793
 794         eapol_auth_step(sta->eapol_sm);
 795 }
 796
 797
 798 void ieee802_1x_new_station(struct hostapd_data *hapd, struct sta_info *sta)
 799 {
 800         struct rsn_pmksa_cache_entry *pmksa;
 801         int reassoc = 1;
 802         int force_1x = 0;
 803
 804         if ((!force_1x && !hapd->conf->ieee802_1x) ||
 805             wpa_auth_sta_key_mgmt(sta->wpa_sm) == WPA_KEY_MGMT_PSK ||
 806             wpa_auth_sta_key_mgmt(sta->wpa_sm) == WPA_KEY_MGMT_FT_PSK)
 807                 return;
 808
 809         if (sta->eapol_sm == NULL) {
 810                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 811                                HOSTAPD_LEVEL_DEBUG, "start authentication");
 812                 sta->eapol_sm = eapol_auth_alloc(hapd->eapol_auth, sta->addr,
 813                                                  sta->flags & WLAN_STA_PREAUTH,
 814                                                  sta);
 815                 if (sta->eapol_sm == NULL) {
 816                         hostapd_logger(hapd, sta->addr,
 817                                        HOSTAPD_MODULE_IEEE8021X,
 818                                        HOSTAPD_LEVEL_INFO,
 819                                        "failed to allocate state machine");
 820                         return;
 821                 }
 822                 reassoc = 0;
 823         }
 824
 825         sta->eapol_sm->eap_if->portEnabled = TRUE;
 826
 827         pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
 828         if (pmksa) {
 829                 int old_vlanid;
 830
 831                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 832                                HOSTAPD_LEVEL_DEBUG,
 833                                "PMK from PMKSA cache - skip IEEE 802.1X/EAP");
 834                 /* Setup EAPOL state machines to already authenticated state
 835                  * because of existing PMKSA information in the cache. */
 836                 sta->eapol_sm->keyRun = TRUE;
 837                 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
 838                 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
 839                 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
 840                 sta->eapol_sm->authSuccess = TRUE;
 841                 if (sta->eapol_sm->eap)
 842                         eap_sm_notify_cached(sta->eapol_sm->eap);
 843                 old_vlanid = sta->vlan_id;
 844                 pmksa_cache_to_eapol_data(pmksa, sta->eapol_sm);
 845                 if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
 846                         sta->vlan_id = 0;
 847                 ap_sta_bind_vlan(hapd, sta, old_vlanid);
 848         } else {
 849                 if (reassoc) {
 850                         /*
 851                          * Force EAPOL state machines to start
 852                          * re-authentication without having to wait for the
 853                          * Supplicant to send EAPOL-Start.
 854                          */
 855                         sta->eapol_sm->reAuthenticate = TRUE;
 856                 }
 857                 eapol_auth_step(sta->eapol_sm);
 858         }
 859 }
 860
 861
 862 void ieee802_1x_free_radius_class(struct radius_class_data *class)
 863 {
 864         size_t i;
 865         if (class == NULL)
 866                 return;
 867         for (i = 0; i < class->count; i++)
 868                 os_free(class->attr[i].data);
 869         os_free(class->attr);
 870         class->attr = NULL;
 871         class->count = 0;
 872 }
 873
 874
 875 int ieee802_1x_copy_radius_class(struct radius_class_data *dst,
 876                                  const struct radius_class_data *src)
 877 {
 878         size_t i;
 879
 880         if (src->attr == NULL)
 881                 return 0;
 882
 883         dst->attr = os_zalloc(src->count * sizeof(struct radius_attr_data));
 884         if (dst->attr == NULL)
 885                 return -1;
 886
 887         dst->count = 0;
 888
 889         for (i = 0; i < src->count; i++) {
 890                 dst->attr[i].data = os_malloc(src->attr[i].len);
 891                 if (dst->attr[i].data == NULL)
 892                         break;
 893                 dst->count++;
 894                 os_memcpy(dst->attr[i].data, src->attr[i].data,
 895                           src->attr[i].len);
 896                 dst->attr[i].len = src->attr[i].len;
 897         }
 898
 899         return 0;
 900 }
 901
 902
 903 void ieee802_1x_free_station(struct sta_info *sta)
 904 {
 905         struct eapol_state_machine *sm = sta->eapol_sm;
 906
 907         eloop_cancel_timeout(ieee802_1x_eap_timeout, sta, NULL);
 908
 909         if (sm == NULL)
 910                 return;
 911
 912         sta->eapol_sm = NULL;
 913
 914         if (sm->last_recv_radius) {
 915                 radius_msg_free(sm->last_recv_radius);
 916                 os_free(sm->last_recv_radius);
 917         }
 918
 919         os_free(sm->identity);
 920         ieee802_1x_free_radius_class(&sm->radius_class);
 921         eapol_auth_free(sm);
 922 }
 923
 924
 925 static void ieee802_1x_decapsulate_radius(struct hostapd_data *hapd,
 926                                           struct sta_info *sta)
 927 {
 928         u8 *eap;
 929         size_t len;
 930         struct eap_hdr *hdr;
 931         int eap_type = -1;
 932         char buf[64];
 933         struct radius_msg *msg;
 934         struct eapol_state_machine *sm = sta->eapol_sm;
 935
 936         if (sm == NULL || sm->last_recv_radius == NULL) {
 937                 if (sm)
 938                         sm->eap_if->aaaEapNoReq = TRUE;
 939                 return;
 940         }
 941
 942         msg = sm->last_recv_radius;
 943
 944         eap = radius_msg_get_eap(msg, &len);
 945         if (eap == NULL) {
 946                 /* RFC 3579, Chap. 2.6.3:
 947                  * RADIUS server SHOULD NOT send Access-Reject/no EAP-Message
 948                  * attribute */
 949                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 950                                HOSTAPD_LEVEL_WARNING, "could not extract "
 951                                "EAP-Message from RADIUS message");
 952                 sm->eap_if->aaaEapNoReq = TRUE;
 953                 return;
 954         }
 955
 956         if (len < sizeof(*hdr)) {
 957                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 958                                HOSTAPD_LEVEL_WARNING, "too short EAP packet "
 959                                "received from authentication server");
 960                 os_free(eap);
 961                 sm->eap_if->aaaEapNoReq = TRUE;
 962                 return;
 963         }
 964
 965         if (len > sizeof(*hdr))
 966                 eap_type = eap[sizeof(*hdr)];
 967
 968         hdr = (struct eap_hdr *) eap;
 969         switch (hdr->code) {
 970         case EAP_CODE_REQUEST:
 971                 if (eap_type >= 0)
 972                         sm->eap_type_authsrv = eap_type;
 973                 os_snprintf(buf, sizeof(buf), "EAP-Request-%s (%d)",
 974                             eap_type >= 0 ? eap_type_text(eap_type) : "??",
 975                             eap_type);
 976                 break;
 977         case EAP_CODE_RESPONSE:
 978                 os_snprintf(buf, sizeof(buf), "EAP Response-%s (%d)",
 979                             eap_type >= 0 ? eap_type_text(eap_type) : "??",
 980                             eap_type);
 981                 break;
 982         case EAP_CODE_SUCCESS:
 983                 os_strlcpy(buf, "EAP Success", sizeof(buf));
 984                 break;
 985         case EAP_CODE_FAILURE:
 986                 os_strlcpy(buf, "EAP Failure", sizeof(buf));
 987                 break;
 988         default:
 989                 os_strlcpy(buf, "unknown EAP code", sizeof(buf));
 990                 break;
 991         }
 992         buf[sizeof(buf) - 1] = '\0';
 993         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 994                        HOSTAPD_LEVEL_DEBUG, "decapsulated EAP packet (code=%d "
 995                        "id=%d len=%d) from RADIUS server: %s",
 996                        hdr->code, hdr->identifier, be_to_host16(hdr->length),
 997                        buf);
 998         sm->eap_if->aaaEapReq = TRUE;
 999
1000         wpabuf_free(sm->eap_if->aaaEapReqData);
1001         sm->eap_if->aaaEapReqData = wpabuf_alloc_ext_data(eap, len);
1002 }
1003
1004
1005 static void ieee802_1x_get_keys(struct hostapd_data *hapd,
1006                                 struct sta_info *sta, struct radius_msg *msg,
1007                                 struct radius_msg *req,
1008                                 u8 *shared_secret, size_t shared_secret_len)
1009 {
1010         struct radius_ms_mppe_keys *keys;
1011         struct eapol_state_machine *sm = sta->eapol_sm;
1012         if (sm == NULL)
1013                 return;
1014
1015         keys = radius_msg_get_ms_keys(msg, req, shared_secret,
1016                                       shared_secret_len);
1017
1018         if (keys && keys->send && keys->recv) {
1019                 size_t len = keys->send_len + keys->recv_len;
1020                 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Send-Key",
1021                                 keys->send, keys->send_len);
1022                 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Recv-Key",
1023                                 keys->recv, keys->recv_len);
1024
1025                 os_free(sm->eap_if->aaaEapKeyData);
1026                 sm->eap_if->aaaEapKeyData = os_malloc(len);
1027                 if (sm->eap_if->aaaEapKeyData) {
1028                         os_memcpy(sm->eap_if->aaaEapKeyData, keys->recv,
1029                                   keys->recv_len);
1030                         os_memcpy(sm->eap_if->aaaEapKeyData + keys->recv_len,
1031                                   keys->send, keys->send_len);
1032                         sm->eap_if->aaaEapKeyDataLen = len;
1033                         sm->eap_if->aaaEapKeyAvailable = TRUE;
1034                 }
1035         }
1036
1037         if (keys) {
1038                 os_free(keys->send);
1039                 os_free(keys->recv);
1040                 os_free(keys);
1041         }
1042 }
1043
1044
1045 static void ieee802_1x_store_radius_class(struct hostapd_data *hapd,
1046                                           struct sta_info *sta,
1047                                           struct radius_msg *msg)
1048 {
1049         u8 *class;
1050         size_t class_len;
1051         struct eapol_state_machine *sm = sta->eapol_sm;
1052         int count, i;
1053         struct radius_attr_data *nclass;
1054         size_t nclass_count;
1055
1056         if (!hapd->conf->radius->acct_server || hapd->radius == NULL ||
1057             sm == NULL)
1058                 return;
1059
1060         ieee802_1x_free_radius_class(&sm->radius_class);
1061         count = radius_msg_count_attr(msg, RADIUS_ATTR_CLASS, 1);
1062         if (count <= 0)
1063                 return;
1064
1065         nclass = os_zalloc(count * sizeof(struct radius_attr_data));
1066         if (nclass == NULL)
1067                 return;
1068
1069         nclass_count = 0;
1070
1071         class = NULL;
1072         for (i = 0; i < count; i++) {
1073                 do {
1074                         if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CLASS,
1075                                                     &class, &class_len,
1076                                                     class) < 0) {
1077                                 i = count;
1078                                 break;
1079                         }
1080                 } while (class_len < 1);
1081
1082                 nclass[nclass_count].data = os_malloc(class_len);
1083                 if (nclass[nclass_count].data == NULL)
1084                         break;
1085
1086                 os_memcpy(nclass[nclass_count].data, class, class_len);
1087                 nclass[nclass_count].len = class_len;
1088                 nclass_count++;
1089         }
1090
1091         sm->radius_class.attr = nclass;
1092         sm->radius_class.count = nclass_count;
1093         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Stored %lu RADIUS Class "
1094                    "attributes for " MACSTR,
1095                    (unsigned long) sm->radius_class.count,
1096                    MAC2STR(sta->addr));
1097 }
1098
1099
1100 /* Update sta->identity based on User-Name attribute in Access-Accept */
1101 static void ieee802_1x_update_sta_identity(struct hostapd_data *hapd,
1102                                            struct sta_info *sta,
1103                                            struct radius_msg *msg)
1104 {
1105         u8 *buf, *identity;
1106         size_t len;
1107         struct eapol_state_machine *sm = sta->eapol_sm;
1108
1109         if (sm == NULL)
1110                 return;
1111
1112         if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_USER_NAME, &buf, &len,
1113                                     NULL) < 0)
1114                 return;
1115
1116         identity = os_malloc(len + 1);
1117         if (identity == NULL)
1118                 return;
1119
1120         os_memcpy(identity, buf, len);
1121         identity[len] = '\0';
1122
1123         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1124                        HOSTAPD_LEVEL_DEBUG, "old identity '%s' updated with "
1125                        "User-Name from Access-Accept '%s'",
1126                        sm->identity ? (char *) sm->identity : "N/A",
1127                        (char *) identity);
1128
1129         os_free(sm->identity);
1130         sm->identity = identity;
1131         sm->identity_len = len;
1132 }
1133
1134
1135 struct sta_id_search {
1136         u8 identifier;
1137         struct eapol_state_machine *sm;
1138 };
1139
1140
1141 static int ieee802_1x_select_radius_identifier(struct hostapd_data *hapd,
1142                                                struct sta_info *sta,
1143                                                void *ctx)
1144 {
1145         struct sta_id_search *id_search = ctx;
1146         struct eapol_state_machine *sm = sta->eapol_sm;
1147
1148         if (sm && sm->radius_identifier >= 0 &&
1149             sm->radius_identifier == id_search->identifier) {
1150                 id_search->sm = sm;
1151                 return 1;
1152         }
1153         return 0;
1154 }
1155
1156
1157 static struct eapol_state_machine *
1158 ieee802_1x_search_radius_identifier(struct hostapd_data *hapd, u8 identifier)
1159 {
1160         struct sta_id_search id_search;
1161         id_search.identifier = identifier;
1162         id_search.sm = NULL;
1163         ap_for_each_sta(hapd, ieee802_1x_select_radius_identifier, &id_search);
1164         return id_search.sm;
1165 }
1166
1167
1168 /* Process the RADIUS frames from Authentication Server */
1169 static RadiusRxResult
1170 ieee802_1x_receive_auth(struct radius_msg *msg, struct radius_msg *req,
1171                         u8 *shared_secret, size_t shared_secret_len,
1172                         void *data)
1173 {
1174         struct hostapd_data *hapd = data;
1175         struct sta_info *sta;
1176         u32 session_timeout = 0, termination_action, acct_interim_interval;
1177         int session_timeout_set, old_vlanid = 0;
1178         int eap_timeout;
1179         struct eapol_state_machine *sm;
1180         int override_eapReq = 0;
1181
1182         sm = ieee802_1x_search_radius_identifier(hapd, msg->hdr->identifier);
1183         if (sm == NULL) {
1184                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Could not find matching "
1185                            "station for this RADIUS message");
1186                 return RADIUS_RX_UNKNOWN;
1187         }
1188         sta = sm->sta;
1189
1190         /* RFC 2869, Ch. 5.13: valid Message-Authenticator attribute MUST be
1191          * present when packet contains an EAP-Message attribute */
1192         if (msg->hdr->code == RADIUS_CODE_ACCESS_REJECT &&
1193             radius_msg_get_attr(msg, RADIUS_ATTR_MESSAGE_AUTHENTICATOR, NULL,
1194                                 0) < 0 &&
1195             radius_msg_get_attr(msg, RADIUS_ATTR_EAP_MESSAGE, NULL, 0) < 0) {
1196                 wpa_printf(MSG_DEBUG, "Allowing RADIUS Access-Reject without "
1197                            "Message-Authenticator since it does not include "
1198                            "EAP-Message");
1199         } else if (radius_msg_verify(msg, shared_secret, shared_secret_len,
1200                                      req, 1)) {
1201                 printf("Incoming RADIUS packet did not have correct "
1202                        "Message-Authenticator - dropped\n");
1203                 return RADIUS_RX_INVALID_AUTHENTICATOR;
1204         }
1205
1206         if (msg->hdr->code != RADIUS_CODE_ACCESS_ACCEPT &&
1207             msg->hdr->code != RADIUS_CODE_ACCESS_REJECT &&
1208             msg->hdr->code != RADIUS_CODE_ACCESS_CHALLENGE) {
1209                 printf("Unknown RADIUS message code\n");
1210                 return RADIUS_RX_UNKNOWN;
1211         }
1212
1213         sm->radius_identifier = -1;
1214         wpa_printf(MSG_DEBUG, "RADIUS packet matching with station " MACSTR,
1215                    MAC2STR(sta->addr));
1216
1217         if (sm->last_recv_radius) {
1218                 radius_msg_free(sm->last_recv_radius);
1219                 os_free(sm->last_recv_radius);
1220         }
1221
1222         sm->last_recv_radius = msg;
1223
1224         session_timeout_set =
1225                 !radius_msg_get_attr_int32(msg, RADIUS_ATTR_SESSION_TIMEOUT,
1226                                            &session_timeout);
1227         if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_TERMINATION_ACTION,
1228                                       &termination_action))
1229                 termination_action = RADIUS_TERMINATION_ACTION_DEFAULT;
1230
1231         if (hapd->conf->radius->acct_interim_interval == 0 &&
1232             msg->hdr->code == RADIUS_CODE_ACCESS_ACCEPT &&
1233             radius_msg_get_attr_int32(msg, RADIUS_ATTR_ACCT_INTERIM_INTERVAL,
1234                                       &acct_interim_interval) == 0) {
1235                 if (acct_interim_interval < 60) {
1236                         hostapd_logger(hapd, sta->addr,
1237                                        HOSTAPD_MODULE_IEEE8021X,
1238                                        HOSTAPD_LEVEL_INFO,
1239                                        "ignored too small "
1240                                        "Acct-Interim-Interval %d",
1241                                        acct_interim_interval);
1242                 } else
1243                         sta->acct_interim_interval = acct_interim_interval;
1244         }
1245
1246
1247         switch (msg->hdr->code) {
1248         case RADIUS_CODE_ACCESS_ACCEPT:
1249                 if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
1250                         sta->vlan_id = 0;
1251                 else {
1252                         old_vlanid = sta->vlan_id;
1253                         sta->vlan_id = radius_msg_get_vlanid(msg);
1254                 }
1255                 if (sta->vlan_id > 0 &&
1256                     hostapd_get_vlan_id_ifname(hapd->conf->vlan,
1257                                                sta->vlan_id)) {
1258                         hostapd_logger(hapd, sta->addr,
1259                                        HOSTAPD_MODULE_RADIUS,
1260                                        HOSTAPD_LEVEL_INFO,
1261                                        "VLAN ID %d", sta->vlan_id);
1262                 } else if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_REQUIRED) {
1263                         sta->eapol_sm->authFail = TRUE;
1264                         hostapd_logger(hapd, sta->addr,
1265                                        HOSTAPD_MODULE_IEEE8021X,
1266                                        HOSTAPD_LEVEL_INFO, "authentication "
1267                                        "server did not include required VLAN "
1268                                        "ID in Access-Accept");
1269                         break;
1270                 }
1271
1272                 ap_sta_bind_vlan(hapd, sta, old_vlanid);
1273
1274                 /* RFC 3580, Ch. 3.17 */
1275                 if (session_timeout_set && termination_action ==
1276                     RADIUS_TERMINATION_ACTION_RADIUS_REQUEST) {
1277                         sm->reAuthPeriod = session_timeout;
1278                 } else if (session_timeout_set)
1279                         ap_sta_session_timeout(hapd, sta, session_timeout);
1280
1281                 sm->eap_if->aaaSuccess = TRUE;
1282                 override_eapReq = 1;
1283                 ieee802_1x_get_keys(hapd, sta, msg, req, shared_secret,
1284                                     shared_secret_len);
1285                 ieee802_1x_store_radius_class(hapd, sta, msg);
1286                 ieee802_1x_update_sta_identity(hapd, sta, msg);
1287                 if (sm->eap_if->eapKeyAvailable &&
1288                     wpa_auth_pmksa_add(sta->wpa_sm, sm->eapol_key_crypt,
1289                                        session_timeout_set ?
1290                                        (int) session_timeout : -1, sm) == 0) {
1291                         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
1292                                        HOSTAPD_LEVEL_DEBUG,
1293                                        "Added PMKSA cache entry");
1294                 }
1295                 break;
1296         case RADIUS_CODE_ACCESS_REJECT:
1297                 sm->eap_if->aaaFail = TRUE;
1298                 override_eapReq = 1;
1299                 break;
1300         case RADIUS_CODE_ACCESS_CHALLENGE:
1301                 sm->eap_if->aaaEapReq = TRUE;
1302                 if (session_timeout_set) {
1303                         /* RFC 2869, Ch. 2.3.2; RFC 3580, Ch. 3.17 */
1304                         eap_timeout = session_timeout;
1305                 } else
1306                         eap_timeout = 30;
1307                 hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
1308                                HOSTAPD_LEVEL_DEBUG,
1309                                "using EAP timeout of %d seconds%s",
1310                                eap_timeout,
1311                                session_timeout_set ? " (from RADIUS)" : "");
1312                 eloop_cancel_timeout(ieee802_1x_eap_timeout, sta, NULL);
1313                 eloop_register_timeout(eap_timeout, 0, ieee802_1x_eap_timeout,
1314                                        sta, NULL);
1315                 sm->eap_if->eapTimeout = FALSE;
1316                 break;
1317         }
1318
1319         ieee802_1x_decapsulate_radius(hapd, sta);
1320         if (override_eapReq)
1321                 sm->eap_if->aaaEapReq = FALSE;
1322
1323         eapol_auth_step(sm);
1324
1325         return RADIUS_RX_QUEUED;
1326 }
1327
1328
1329 void ieee802_1x_abort_auth(struct hostapd_data *hapd, struct sta_info *sta)
1330 {
1331         struct eapol_state_machine *sm = sta->eapol_sm;
1332         if (sm == NULL)
1333                 return;
1334
1335         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1336                        HOSTAPD_LEVEL_DEBUG, "aborting authentication");
1337
1338         if (sm->last_recv_radius) {
1339                 radius_msg_free(sm->last_recv_radius);
1340                 os_free(sm->last_recv_radius);
1341                 sm->last_recv_radius = NULL;
1342         }
1343 }
1344
1345
1346 #ifdef HOSTAPD_DUMP_STATE
1347 static void fprint_char(FILE *f, char c)
1348 {
1349         if (c >= 32 && c < 127)
1350                 fprintf(f, "%c", c);
1351         else
1352                 fprintf(f, "<%02x>", c);
1353 }
1354
1355
1356 void ieee802_1x_dump_state(FILE *f, const char *prefix, struct sta_info *sta)
1357 {
1358         struct eapol_state_machine *sm = sta->eapol_sm;
1359         if (sm == NULL)
1360                 return;
1361
1362         fprintf(f, "%sIEEE 802.1X:\n", prefix);
1363
1364         if (sm->identity) {
1365                 size_t i;
1366                 fprintf(f, "%sidentity=", prefix);
1367                 for (i = 0; i < sm->identity_len; i++)
1368                         fprint_char(f, sm->identity[i]);
1369                 fprintf(f, "\n");
1370         }
1371
1372         fprintf(f, "%slast EAP type: Authentication Server: %d (%s) "
1373                 "Supplicant: %d (%s)\n", prefix,
1374                 sm->eap_type_authsrv, eap_type_text(sm->eap_type_authsrv),
1375                 sm->eap_type_supp, eap_type_text(sm->eap_type_supp));
1376
1377         fprintf(f, "%scached_packets=%s\n", prefix,
1378                 sm->last_recv_radius ? "[RX RADIUS]" : "");
1379
1380         eapol_auth_dump_state(f, prefix, sm);
1381 }
1382 #endif /* HOSTAPD_DUMP_STATE */
1383
1384
1385 static int ieee802_1x_rekey_broadcast(struct hostapd_data *hapd)
1386 {
1387         if (hapd->conf->default_wep_key_len < 1)
1388                 return 0;
1389
1390         os_free(hapd->default_wep_key);
1391         hapd->default_wep_key = os_malloc(hapd->conf->default_wep_key_len);
1392         if (hapd->default_wep_key == NULL ||
1393             os_get_random(hapd->default_wep_key,
1394                           hapd->conf->default_wep_key_len)) {
1395                 printf("Could not generate random WEP key.\n");
1396                 os_free(hapd->default_wep_key);
1397                 hapd->default_wep_key = NULL;
1398                 return -1;
1399         }
1400
1401         wpa_hexdump_key(MSG_DEBUG, "IEEE 802.1X: New default WEP key",
1402                         hapd->default_wep_key,
1403                         hapd->conf->default_wep_key_len);
1404
1405         return 0;
1406 }
1407
1408
1409 static int ieee802_1x_sta_key_available(struct hostapd_data *hapd,
1410                                         struct sta_info *sta, void *ctx)
1411 {
1412         if (sta->eapol_sm) {
1413                 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
1414                 eapol_auth_step(sta->eapol_sm);
1415         }
1416         return 0;
1417 }
1418
1419
1420 static void ieee802_1x_rekey(void *eloop_ctx, void *timeout_ctx)
1421 {
1422         struct hostapd_data *hapd = eloop_ctx;
1423
1424         if (hapd->default_wep_key_idx >= 3)
1425                 hapd->default_wep_key_idx =
1426                         hapd->conf->individual_wep_key_len > 0 ? 1 : 0;
1427         else
1428                 hapd->default_wep_key_idx++;
1429
1430         wpa_printf(MSG_DEBUG, "IEEE 802.1X: New default WEP key index %d",
1431                    hapd->default_wep_key_idx);
1432
1433         if (ieee802_1x_rekey_broadcast(hapd)) {
1434                 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1435                                HOSTAPD_LEVEL_WARNING, "failed to generate a "
1436                                "new broadcast key");
1437                 os_free(hapd->default_wep_key);
1438                 hapd->default_wep_key = NULL;
1439                 return;
1440         }
1441
1442         /* TODO: Could setup key for RX here, but change default TX keyid only
1443          * after new broadcast key has been sent to all stations. */
1444         if (hostapd_set_encryption(hapd->conf->iface, hapd, "WEP", NULL,
1445                                    hapd->default_wep_key_idx,
1446                                    hapd->default_wep_key,
1447                                    hapd->conf->default_wep_key_len, 1)) {
1448                 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1449                                HOSTAPD_LEVEL_WARNING, "failed to configure a "
1450                                "new broadcast key");
1451                 os_free(hapd->default_wep_key);
1452                 hapd->default_wep_key = NULL;
1453                 return;
1454         }
1455
1456         ap_for_each_sta(hapd, ieee802_1x_sta_key_available, NULL);
1457
1458         if (hapd->conf->wep_rekeying_period > 0) {
1459                 eloop_register_timeout(hapd->conf->wep_rekeying_period, 0,
1460                                        ieee802_1x_rekey, hapd, NULL);
1461         }
1462 }
1463
1464
1465 static void ieee802_1x_eapol_send(void *ctx, void *sta_ctx, u8 type,
1466                                   const u8 *data, size_t datalen)
1467 {
1468         ieee802_1x_send(ctx, sta_ctx, type, data, datalen);
1469 }
1470
1471
1472 static void ieee802_1x_aaa_send(void *ctx, void *sta_ctx,
1473                                 const u8 *data, size_t datalen)
1474 {
1475         struct hostapd_data *hapd = ctx;
1476         struct sta_info *sta = sta_ctx;
1477
1478         ieee802_1x_encapsulate_radius(hapd, sta, data, datalen);
1479 }
1480
1481
1482 static void _ieee802_1x_finished(void *ctx, void *sta_ctx, int success,
1483                                  int preauth)
1484 {
1485         struct hostapd_data *hapd = ctx;
1486         struct sta_info *sta = sta_ctx;
1487         if (preauth)
1488                 rsn_preauth_finished(hapd, sta, success);
1489         else
1490                 ieee802_1x_finished(hapd, sta, success);
1491 }
1492
1493
1494 static int ieee802_1x_get_eap_user(void *ctx, const u8 *identity,
1495                                    size_t identity_len, int phase2,
1496                                    struct eap_user *user)
1497 {
1498         struct hostapd_data *hapd = ctx;
1499         const struct hostapd_eap_user *eap_user;
1500         int i, count;
1501
1502         eap_user = hostapd_get_eap_user(hapd->conf, identity,
1503                                         identity_len, phase2);
1504         if (eap_user == NULL)
1505                 return -1;
1506
1507         os_memset(user, 0, sizeof(*user));
1508         user->phase2 = phase2;
1509         count = EAP_USER_MAX_METHODS;
1510         if (count > EAP_MAX_METHODS)
1511                 count = EAP_MAX_METHODS;
1512         for (i = 0; i < count; i++) {
1513                 user->methods[i].vendor = eap_user->methods[i].vendor;
1514                 user->methods[i].method = eap_user->methods[i].method;
1515         }
1516
1517         if (eap_user->password) {
1518                 user->password = os_malloc(eap_user->password_len);
1519                 if (user->password == NULL)
1520                         return -1;
1521                 os_memcpy(user->password, eap_user->password,
1522                           eap_user->password_len);
1523                 user->password_len = eap_user->password_len;
1524         }
1525         user->force_version = eap_user->force_version;
1526         user->ttls_auth = eap_user->ttls_auth;
1527
1528         return 0;
1529 }
1530
1531
1532 static int ieee802_1x_sta_entry_alive(void *ctx, const u8 *addr)
1533 {
1534         struct hostapd_data *hapd = ctx;
1535         struct sta_info *sta;
1536         sta = ap_get_sta(hapd, addr);
1537         if (sta == NULL || sta->eapol_sm == NULL)
1538                 return 0;
1539         return 1;
1540 }
1541
1542
1543 static void ieee802_1x_logger(void *ctx, const u8 *addr,
1544                               eapol_logger_level level, const char *txt)
1545 {
1546         struct hostapd_data *hapd = ctx;
1547         int hlevel;
1548
1549         switch (level) {
1550         case EAPOL_LOGGER_WARNING:
1551                 hlevel = HOSTAPD_LEVEL_WARNING;
1552                 break;
1553         case EAPOL_LOGGER_INFO:
1554                 hlevel = HOSTAPD_LEVEL_INFO;
1555                 break;
1556         case EAPOL_LOGGER_DEBUG:
1557         default:
1558                 hlevel = HOSTAPD_LEVEL_DEBUG;
1559                 break;
1560         }
1561
1562         hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE8021X, hlevel, "%s",
1563                        txt);
1564 }
1565
1566
1567 static void ieee802_1x_set_port_authorized(void *ctx, void *sta_ctx,
1568                                            int authorized)
1569 {
1570         struct hostapd_data *hapd = ctx;
1571         struct sta_info *sta = sta_ctx;
1572         ieee802_1x_set_sta_authorized(hapd, sta, authorized);
1573 }
1574
1575
1576 static void _ieee802_1x_abort_auth(void *ctx, void *sta_ctx)
1577 {
1578         struct hostapd_data *hapd = ctx;
1579         struct sta_info *sta = sta_ctx;
1580         ieee802_1x_abort_auth(hapd, sta);
1581 }
1582
1583
1584 static void _ieee802_1x_tx_key(void *ctx, void *sta_ctx)
1585 {
1586         struct hostapd_data *hapd = ctx;
1587         struct sta_info *sta = sta_ctx;
1588         ieee802_1x_tx_key(hapd, sta);
1589 }
1590
1591
1592 int ieee802_1x_init(struct hostapd_data *hapd)
1593 {
1594         int i;
1595         struct eapol_auth_config conf;
1596         struct eapol_auth_cb cb;
1597
1598         os_memset(&conf, 0, sizeof(conf));
1599         conf.hapd = hapd;
1600         conf.eap_reauth_period = hapd->conf->eap_reauth_period;
1601         conf.wpa = hapd->conf->wpa;
1602         conf.individual_wep_key_len = hapd->conf->individual_wep_key_len;
1603         conf.eap_server = hapd->conf->eap_server;
1604         conf.ssl_ctx = hapd->ssl_ctx;
1605         conf.eap_sim_db_priv = hapd->eap_sim_db_priv;
1606         conf.eap_req_id_text = hapd->conf->eap_req_id_text;
1607         conf.eap_req_id_text_len = hapd->conf->eap_req_id_text_len;
1608         conf.pac_opaque_encr_key = hapd->conf->pac_opaque_encr_key;
1609         conf.eap_fast_a_id = hapd->conf->eap_fast_a_id;
1610         conf.eap_sim_aka_result_ind = hapd->conf->eap_sim_aka_result_ind;
1611         conf.tnc = hapd->conf->tnc;
1612
1613         os_memset(&cb, 0, sizeof(cb));
1614         cb.eapol_send = ieee802_1x_eapol_send;
1615         cb.aaa_send = ieee802_1x_aaa_send;
1616         cb.finished = _ieee802_1x_finished;
1617         cb.get_eap_user = ieee802_1x_get_eap_user;
1618         cb.sta_entry_alive = ieee802_1x_sta_entry_alive;
1619         cb.logger = ieee802_1x_logger;
1620         cb.set_port_authorized = ieee802_1x_set_port_authorized;
1621         cb.abort_auth = _ieee802_1x_abort_auth;
1622         cb.tx_key = _ieee802_1x_tx_key;
1623
1624         hapd->eapol_auth = eapol_auth_init(&conf, &cb);
1625         if (hapd->eapol_auth == NULL)
1626                 return -1;
1627
1628         if ((hapd->conf->ieee802_1x || hapd->conf->wpa) &&
1629             hostapd_set_ieee8021x(hapd->conf->iface, hapd, 1))
1630                 return -1;
1631
1632         if (radius_client_register(hapd->radius, RADIUS_AUTH,
1633                                    ieee802_1x_receive_auth, hapd))
1634                 return -1;
1635
1636         if (hapd->conf->default_wep_key_len) {
1637                 hostapd_set_privacy(hapd, 1);
1638
1639                 for (i = 0; i < 4; i++)
1640                         hostapd_set_encryption(hapd->conf->iface, hapd,
1641                                                "none", NULL, i, NULL, 0, 0);
1642
1643                 ieee802_1x_rekey(hapd, NULL);
1644
1645                 if (hapd->default_wep_key == NULL)
1646                         return -1;
1647         }
1648
1649         return 0;
1650 }
1651
1652
1653 void ieee802_1x_deinit(struct hostapd_data *hapd)
1654 {
1655         eloop_cancel_timeout(ieee802_1x_rekey, hapd, NULL);
1656
1657         if (hapd->driver != NULL &&
1658             (hapd->conf->ieee802_1x || hapd->conf->wpa))
1659                 hostapd_set_ieee8021x(hapd->conf->iface, hapd, 0);
1660
1661         eapol_auth_deinit(hapd->eapol_auth);
1662         hapd->eapol_auth = NULL;
1663 }
1664
1665
1666 int ieee802_1x_reconfig(struct hostapd_data *hapd,
1667                         struct hostapd_config *oldconf,
1668                         struct hostapd_bss_config *oldbss)
1669 {
1670         ieee802_1x_deinit(hapd);
1671         return ieee802_1x_init(hapd);
1672 }
1673
1674
1675 int ieee802_1x_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
1676                          u8 *buf, size_t len, int ack)
1677 {
1678         struct ieee80211_hdr *hdr;
1679         struct ieee802_1x_hdr *xhdr;
1680         struct ieee802_1x_eapol_key *key;
1681         u8 *pos;
1682         const unsigned char rfc1042_hdr[ETH_ALEN] =
1683                 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
1684
1685         if (sta == NULL)
1686                 return -1;
1687         if (len < sizeof(*hdr) + sizeof(rfc1042_hdr) + 2 + sizeof(*xhdr))
1688                 return 0;
1689
1690         hdr = (struct ieee80211_hdr *) buf;
1691         pos = (u8 *) (hdr + 1);
1692         if (os_memcmp(pos, rfc1042_hdr, sizeof(rfc1042_hdr)) != 0)
1693                 return 0;
1694         pos += sizeof(rfc1042_hdr);
1695         if (WPA_GET_BE16(pos) != ETH_P_PAE)
1696                 return 0;
1697         pos += 2;
1698
1699         xhdr = (struct ieee802_1x_hdr *) pos;
1700         pos += sizeof(*xhdr);
1701
1702         wpa_printf(MSG_DEBUG, "IEEE 802.1X: " MACSTR " TX status - version=%d "
1703                    "type=%d length=%d - ack=%d",
1704                    MAC2STR(sta->addr), xhdr->version, xhdr->type,
1705                    be_to_host16(xhdr->length), ack);
1706
1707         /* EAPOL EAP-Packet packets are eventually re-sent by either Supplicant
1708          * or Authenticator state machines, but EAPOL-Key packets are not
1709          * retransmitted in case of failure. Try to re-sent failed EAPOL-Key
1710          * packets couple of times because otherwise STA keys become
1711          * unsynchronized with AP. */
1712         if (xhdr->type == IEEE802_1X_TYPE_EAPOL_KEY && !ack &&
1713             pos + sizeof(*key) <= buf + len) {
1714                 key = (struct ieee802_1x_eapol_key *) pos;
1715                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1716                                HOSTAPD_LEVEL_DEBUG, "did not Ack EAPOL-Key "
1717                                "frame (%scast index=%d)",
1718                                key->key_index & BIT(7) ? "uni" : "broad",
1719                                key->key_index & ~BIT(7));
1720                 /* TODO: re-send EAPOL-Key couple of times (with short delay
1721                  * between them?). If all attempt fail, report error and
1722                  * deauthenticate STA so that it will get new keys when
1723                  * authenticating again (e.g., after returning in range).
1724                  * Separate limit/transmit state needed both for unicast and
1725                  * broadcast keys(?) */
1726         }
1727         /* TODO: could move unicast key configuration from ieee802_1x_tx_key()
1728          * to here and change the key only if the EAPOL-Key packet was Acked.
1729          */
1730
1731         return 1;
1732 }
1733
1734
1735 u8 * ieee802_1x_get_identity(struct eapol_state_machine *sm, size_t *len)
1736 {
1737         if (sm == NULL || sm->identity == NULL)
1738                 return NULL;
1739
1740         *len = sm->identity_len;
1741         return sm->identity;
1742 }
1743
1744
1745 u8 * ieee802_1x_get_radius_class(struct eapol_state_machine *sm, size_t *len,
1746                                  int idx)
1747 {
1748         if (sm == NULL || sm->radius_class.attr == NULL ||
1749             idx >= (int) sm->radius_class.count)
1750                 return NULL;
1751
1752         *len = sm->radius_class.attr[idx].len;
1753         return sm->radius_class.attr[idx].data;
1754 }
1755
1756
1757 const u8 * ieee802_1x_get_key(struct eapol_state_machine *sm, size_t *len)
1758 {
1759         if (sm == NULL)
1760                 return NULL;
1761
1762         *len = sm->eap_if->eapKeyDataLen;
1763         return sm->eap_if->eapKeyData;
1764 }
1765
1766
1767 void ieee802_1x_notify_port_enabled(struct eapol_state_machine *sm,
1768                                     int enabled)
1769 {
1770         if (sm == NULL)
1771                 return;
1772         sm->eap_if->portEnabled = enabled ? TRUE : FALSE;
1773         eapol_auth_step(sm);
1774 }
1775
1776
1777 void ieee802_1x_notify_port_valid(struct eapol_state_machine *sm,
1778                                   int valid)
1779 {
1780         if (sm == NULL)
1781                 return;
1782         sm->portValid = valid ? TRUE : FALSE;
1783         eapol_auth_step(sm);
1784 }
1785
1786
1787 void ieee802_1x_notify_pre_auth(struct eapol_state_machine *sm, int pre_auth)
1788 {
1789         if (sm == NULL)
1790                 return;
1791         if (pre_auth)
1792                 sm->flags |= EAPOL_SM_PREAUTH;
1793         else
1794                 sm->flags &= ~EAPOL_SM_PREAUTH;
1795 }
1796
1797
1798 static const char * bool_txt(Boolean bool)
1799 {
1800         return bool ? "TRUE" : "FALSE";
1801 }
1802
1803
1804 int ieee802_1x_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
1805 {
1806         /* TODO */
1807         return 0;
1808 }
1809
1810
1811 int ieee802_1x_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
1812                            char *buf, size_t buflen)
1813 {
1814         int len = 0, ret;
1815         struct eapol_state_machine *sm = sta->eapol_sm;
1816
1817         if (sm == NULL)
1818                 return 0;
1819
1820         ret = os_snprintf(buf + len, buflen - len,
1821                           "dot1xPaePortNumber=%d\n"
1822                           "dot1xPaePortProtocolVersion=%d\n"
1823                           "dot1xPaePortCapabilities=1\n"
1824                           "dot1xPaePortInitialize=%d\n"
1825                           "dot1xPaePortReauthenticate=FALSE\n",
1826                           sta->aid,
1827                           EAPOL_VERSION,
1828                           sm->initialize);
1829         if (ret < 0 || (size_t) ret >= buflen - len)
1830                 return len;
1831         len += ret;
1832
1833         /* dot1xAuthConfigTable */
1834         ret = os_snprintf(buf + len, buflen - len,
1835                           "dot1xAuthPaeState=%d\n"
1836                           "dot1xAuthBackendAuthState=%d\n"
1837                           "dot1xAuthAdminControlledDirections=%d\n"
1838                           "dot1xAuthOperControlledDirections=%d\n"
1839                           "dot1xAuthAuthControlledPortStatus=%d\n"
1840                           "dot1xAuthAuthControlledPortControl=%d\n"
1841                           "dot1xAuthQuietPeriod=%u\n"
1842                           "dot1xAuthServerTimeout=%u\n"
1843                           "dot1xAuthReAuthPeriod=%u\n"
1844                           "dot1xAuthReAuthEnabled=%s\n"
1845                           "dot1xAuthKeyTxEnabled=%s\n",
1846                           sm->auth_pae_state + 1,
1847                           sm->be_auth_state + 1,
1848                           sm->adminControlledDirections,
1849                           sm->operControlledDirections,
1850                           sm->authPortStatus,
1851                           sm->portControl,
1852                           sm->quietPeriod,
1853                           sm->serverTimeout,
1854                           sm->reAuthPeriod,
1855                           bool_txt(sm->reAuthEnabled),
1856                           bool_txt(sm->keyTxEnabled));
1857         if (ret < 0 || (size_t) ret >= buflen - len)
1858                 return len;
1859         len += ret;
1860
1861         /* dot1xAuthStatsTable */
1862         ret = os_snprintf(buf + len, buflen - len,
1863                           "dot1xAuthEapolFramesRx=%u\n"
1864                           "dot1xAuthEapolFramesTx=%u\n"
1865                           "dot1xAuthEapolStartFramesRx=%u\n"
1866                           "dot1xAuthEapolLogoffFramesRx=%u\n"
1867                           "dot1xAuthEapolRespIdFramesRx=%u\n"
1868                           "dot1xAuthEapolRespFramesRx=%u\n"
1869                           "dot1xAuthEapolReqIdFramesTx=%u\n"
1870                           "dot1xAuthEapolReqFramesTx=%u\n"
1871                           "dot1xAuthInvalidEapolFramesRx=%u\n"
1872                           "dot1xAuthEapLengthErrorFramesRx=%u\n"
1873                           "dot1xAuthLastEapolFrameVersion=%u\n"
1874                           "dot1xAuthLastEapolFrameSource=" MACSTR "\n",
1875                           sm->dot1xAuthEapolFramesRx,
1876                           sm->dot1xAuthEapolFramesTx,
1877                           sm->dot1xAuthEapolStartFramesRx,
1878                           sm->dot1xAuthEapolLogoffFramesRx,
1879                           sm->dot1xAuthEapolRespIdFramesRx,
1880                           sm->dot1xAuthEapolRespFramesRx,
1881                           sm->dot1xAuthEapolReqIdFramesTx,
1882                           sm->dot1xAuthEapolReqFramesTx,
1883                           sm->dot1xAuthInvalidEapolFramesRx,
1884                           sm->dot1xAuthEapLengthErrorFramesRx,
1885                           sm->dot1xAuthLastEapolFrameVersion,
1886                           MAC2STR(sm->addr));
1887         if (ret < 0 || (size_t) ret >= buflen - len)
1888                 return len;
1889         len += ret;
1890
1891         /* dot1xAuthDiagTable */
1892         ret = os_snprintf(buf + len, buflen - len,
1893                           "dot1xAuthEntersConnecting=%u\n"
1894                           "dot1xAuthEapLogoffsWhileConnecting=%u\n"
1895                           "dot1xAuthEntersAuthenticating=%u\n"
1896                           "dot1xAuthAuthSuccessesWhileAuthenticating=%u\n"
1897                           "dot1xAuthAuthTimeoutsWhileAuthenticating=%u\n"
1898                           "dot1xAuthAuthFailWhileAuthenticating=%u\n"
1899                           "dot1xAuthAuthEapStartsWhileAuthenticating=%u\n"
1900                           "dot1xAuthAuthEapLogoffWhileAuthenticating=%u\n"
1901                           "dot1xAuthAuthReauthsWhileAuthenticated=%u\n"
1902                           "dot1xAuthAuthEapStartsWhileAuthenticated=%u\n"
1903                           "dot1xAuthAuthEapLogoffWhileAuthenticated=%u\n"
1904                           "dot1xAuthBackendResponses=%u\n"
1905                           "dot1xAuthBackendAccessChallenges=%u\n"
1906                           "dot1xAuthBackendOtherRequestsToSupplicant=%u\n"
1907                           "dot1xAuthBackendAuthSuccesses=%u\n"
1908                           "dot1xAuthBackendAuthFails=%u\n",
1909                           sm->authEntersConnecting,
1910                           sm->authEapLogoffsWhileConnecting,
1911                           sm->authEntersAuthenticating,
1912                           sm->authAuthSuccessesWhileAuthenticating,
1913                           sm->authAuthTimeoutsWhileAuthenticating,
1914                           sm->authAuthFailWhileAuthenticating,
1915                           sm->authAuthEapStartsWhileAuthenticating,
1916                           sm->authAuthEapLogoffWhileAuthenticating,
1917                           sm->authAuthReauthsWhileAuthenticated,
1918                           sm->authAuthEapStartsWhileAuthenticated,
1919                           sm->authAuthEapLogoffWhileAuthenticated,
1920                           sm->backendResponses,
1921                           sm->backendAccessChallenges,
1922                           sm->backendOtherRequestsToSupplicant,
1923                           sm->backendAuthSuccesses,
1924                           sm->backendAuthFails);
1925         if (ret < 0 || (size_t) ret >= buflen - len)
1926                 return len;
1927         len += ret;
1928
1929         /* dot1xAuthSessionStatsTable */
1930         ret = os_snprintf(buf + len, buflen - len,
1931                           /* TODO: dot1xAuthSessionOctetsRx */
1932                           /* TODO: dot1xAuthSessionOctetsTx */
1933                           /* TODO: dot1xAuthSessionFramesRx */
1934                           /* TODO: dot1xAuthSessionFramesTx */
1935                           "dot1xAuthSessionId=%08X-%08X\n"
1936                           "dot1xAuthSessionAuthenticMethod=%d\n"
1937                           "dot1xAuthSessionTime=%u\n"
1938                           "dot1xAuthSessionTerminateCause=999\n"
1939                           "dot1xAuthSessionUserName=%s\n",
1940                           sta->acct_session_id_hi, sta->acct_session_id_lo,
1941                           (wpa_auth_sta_key_mgmt(sta->wpa_sm) ==
1942                            WPA_KEY_MGMT_IEEE8021X ||
1943                            wpa_auth_sta_key_mgmt(sta->wpa_sm) ==
1944                            WPA_KEY_MGMT_FT_IEEE8021X) ? 1 : 2,
1945                           (unsigned int) (time(NULL) -
1946                                           sta->acct_session_start),
1947                           sm->identity);
1948         if (ret < 0 || (size_t) ret >= buflen - len)
1949                 return len;
1950         len += ret;
1951
1952         return len;
1953 }
1954
1955
1956 static void ieee802_1x_finished(struct hostapd_data *hapd,
1957                                 struct sta_info *sta, int success)
1958 {
1959         const u8 *key;
1960         size_t len;
1961         /* TODO: get PMKLifetime from WPA parameters */
1962         static const int dot11RSNAConfigPMKLifetime = 43200;
1963
1964         key = ieee802_1x_get_key(sta->eapol_sm, &len);
1965         if (success && key && len >= PMK_LEN &&
1966             wpa_auth_pmksa_add(sta->wpa_sm, key, dot11RSNAConfigPMKLifetime,
1967                                sta->eapol_sm) == 0) {
1968                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
1969                                HOSTAPD_LEVEL_DEBUG,
1970                                "Added PMKSA cache entry (IEEE 802.1X)");
1971         }
1972 }