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_tx_key_one(struct hostapd_data *hapd,
 109                                   struct sta_info *sta,
 110                                   int idx, int broadcast,
 111                                   u8 *key_data, size_t key_len)
 112 {
 113         u8 *buf, *ekey;
 114         struct ieee802_1x_hdr *hdr;
 115         struct ieee802_1x_eapol_key *key;
 116         size_t len, ekey_len;
 117         struct eapol_state_machine *sm = sta->eapol_sm;
 118
 119         if (sm == NULL)
 120                 return;
 121
 122         len = sizeof(*key) + key_len;
 123         buf = os_zalloc(sizeof(*hdr) + len);
 124         if (buf == NULL)
 125                 return;
 126
 127         hdr = (struct ieee802_1x_hdr *) buf;
 128         key = (struct ieee802_1x_eapol_key *) (hdr + 1);
 129         key->type = EAPOL_KEY_TYPE_RC4;
 130         key->key_length = htons(key_len);
 131         wpa_get_ntp_timestamp(key->replay_counter);
 132
 133         if (os_get_random(key->key_iv, sizeof(key->key_iv))) {
 134                 wpa_printf(MSG_ERROR, "Could not get random numbers");
 135                 os_free(buf);
 136                 return;
 137         }
 138
 139         key->key_index = idx | (broadcast ? 0 : BIT(7));
 140         if (hapd->conf->eapol_key_index_workaround) {
 141                 /* According to some information, WinXP Supplicant seems to
 142                  * interpret bit7 as an indication whether the key is to be
 143                  * activated, so make it possible to enable workaround that
 144                  * sets this bit for all keys. */
 145                 key->key_index |= BIT(7);
 146         }
 147
 148         /* Key is encrypted using "Key-IV + MSK[0..31]" as the RC4-key and
 149          * MSK[32..63] is used to sign the message. */
 150         if (sm->eap_if->eapKeyData == NULL || sm->eap_if->eapKeyDataLen < 64) {
 151                 wpa_printf(MSG_ERROR, "No eapKeyData available for encrypting "
 152                            "and signing EAPOL-Key");
 153                 os_free(buf);
 154                 return;
 155         }
 156         os_memcpy((u8 *) (key + 1), key_data, key_len);
 157         ekey_len = sizeof(key->key_iv) + 32;
 158         ekey = os_malloc(ekey_len);
 159         if (ekey == NULL) {
 160                 wpa_printf(MSG_ERROR, "Could not encrypt key");
 161                 os_free(buf);
 162                 return;
 163         }
 164         os_memcpy(ekey, key->key_iv, sizeof(key->key_iv));
 165         os_memcpy(ekey + sizeof(key->key_iv), sm->eap_if->eapKeyData, 32);
 166         rc4((u8 *) (key + 1), key_len, ekey, ekey_len);
 167         os_free(ekey);
 168
 169         /* This header is needed here for HMAC-MD5, but it will be regenerated
 170          * in ieee802_1x_send() */
 171         hdr->version = hapd->conf->eapol_version;
 172         hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
 173         hdr->length = host_to_be16(len);
 174         hmac_md5(sm->eap_if->eapKeyData + 32, 32, buf, sizeof(*hdr) + len,
 175                  key->key_signature);
 176
 177         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key to " MACSTR
 178                    " (%s index=%d)", MAC2STR(sm->addr),
 179                    broadcast ? "broadcast" : "unicast", idx);
 180         ieee802_1x_send(hapd, sta, IEEE802_1X_TYPE_EAPOL_KEY, (u8 *) key, len);
 181         if (sta->eapol_sm)
 182                 sta->eapol_sm->dot1xAuthEapolFramesTx++;
 183         os_free(buf);
 184 }
 185
 186
 187 static struct hostapd_wep_keys *
 188 ieee802_1x_group_alloc(struct hostapd_data *hapd, const char *ifname)
 189 {
 190         struct hostapd_wep_keys *key;
 191
 192         key = os_zalloc(sizeof(*key));
 193         if (key == NULL)
 194                 return NULL;
 195
 196         key->default_len = hapd->conf->default_wep_key_len;
 197
 198         if (key->idx >= hapd->conf->broadcast_key_idx_max ||
 199             key->idx < hapd->conf->broadcast_key_idx_min)
 200                 key->idx = hapd->conf->broadcast_key_idx_min;
 201         else
 202                 key->idx++;
 203
 204         if (!key->key[key->idx])
 205                 key->key[key->idx] = os_malloc(key->default_len);
 206         if (key->key[key->idx] == NULL ||
 207             os_get_random(key->key[key->idx], key->default_len)) {
 208                 printf("Could not generate random WEP key (dynamic VLAN).\n");
 209                 os_free(key->key[key->idx]);
 210                 key->key[key->idx] = NULL;
 211                 os_free(key);
 212                 return NULL;
 213         }
 214         key->len[key->idx] = key->default_len;
 215
 216         wpa_printf(MSG_DEBUG, "%s: Default WEP idx %d for dynamic VLAN\n",
 217                    ifname, key->idx);
 218         wpa_hexdump_key(MSG_DEBUG, "Default WEP key (dynamic VLAN)",
 219                         key->key[key->idx], key->len[key->idx]);
 220
 221         if (hostapd_set_encryption(ifname, hapd, "WEP", NULL, key->idx,
 222                                    key->key[key->idx], key->len[key->idx], 1))
 223                 printf("Could not set dynamic VLAN WEP encryption key.\n");
 224
 225         hostapd_set_ieee8021x(ifname, hapd, 1);
 226
 227         return key;
 228 }
 229
 230
 231 static struct hostapd_wep_keys *
 232 ieee802_1x_get_group(struct hostapd_data *hapd, struct hostapd_ssid *ssid,
 233                      size_t vlan_id)
 234 {
 235         const char *ifname;
 236
 237         if (vlan_id == 0)
 238                 return &ssid->wep;
 239
 240         if (vlan_id <= ssid->max_dyn_vlan_keys && ssid->dyn_vlan_keys &&
 241             ssid->dyn_vlan_keys[vlan_id])
 242                 return ssid->dyn_vlan_keys[vlan_id];
 243
 244         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Creating new group "
 245                    "state machine for VLAN ID %lu",
 246                    (unsigned long) vlan_id);
 247
 248         ifname = hostapd_get_vlan_id_ifname(hapd->conf->vlan, vlan_id);
 249         if (ifname == NULL) {
 250                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Unknown VLAN ID %lu - "
 251                            "cannot create group key state machine",
 252                            (unsigned long) vlan_id);
 253                 return NULL;
 254         }
 255
 256         if (ssid->dyn_vlan_keys == NULL) {
 257                 int size = (vlan_id + 1) * sizeof(ssid->dyn_vlan_keys[0]);
 258                 ssid->dyn_vlan_keys = os_zalloc(size);
 259                 if (ssid->dyn_vlan_keys == NULL)
 260                         return NULL;
 261                 ssid->max_dyn_vlan_keys = vlan_id;
 262         }
 263
 264         if (ssid->max_dyn_vlan_keys < vlan_id) {
 265                 struct hostapd_wep_keys **na;
 266                 int size = (vlan_id + 1) * sizeof(ssid->dyn_vlan_keys[0]);
 267                 na = os_realloc(ssid->dyn_vlan_keys, size);
 268                 if (na == NULL)
 269                         return NULL;
 270                 ssid->dyn_vlan_keys = na;
 271                 os_memset(&ssid->dyn_vlan_keys[ssid->max_dyn_vlan_keys + 1], 0,
 272                           (vlan_id - ssid->max_dyn_vlan_keys) *
 273                           sizeof(ssid->dyn_vlan_keys[0]));
 274                 ssid->max_dyn_vlan_keys = vlan_id;
 275         }
 276
 277         ssid->dyn_vlan_keys[vlan_id] = ieee802_1x_group_alloc(hapd, ifname);
 278
 279         return ssid->dyn_vlan_keys[vlan_id];
 280 }
 281
 282
 283 void ieee802_1x_tx_key(struct hostapd_data *hapd, struct sta_info *sta)
 284 {
 285         struct hostapd_wep_keys *key = NULL;
 286         struct eapol_state_machine *sm = sta->eapol_sm;
 287         int vlan_id;
 288
 289         if (sm == NULL || !sm->eap_if->eapKeyData)
 290                 return;
 291
 292         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key(s) to " MACSTR,
 293                    MAC2STR(sta->addr));
 294
 295         vlan_id = sta->vlan_id;
 296         if (vlan_id < 0 || vlan_id > MAX_VLAN_ID)
 297                 vlan_id = 0;
 298
 299         if (vlan_id) {
 300                 key = ieee802_1x_get_group(hapd, sta->ssid, vlan_id);
 301                 if (key && key->key[key->idx])
 302                         ieee802_1x_tx_key_one(hapd, sta, key->idx, 1,
 303                                               key->key[key->idx],
 304                                               key->len[key->idx]);
 305         } else if (hapd->default_wep_key) {
 306                 ieee802_1x_tx_key_one(hapd, sta, hapd->default_wep_key_idx, 1,
 307                                       hapd->default_wep_key,
 308                                       hapd->conf->default_wep_key_len);
 309         }
 310
 311         if (hapd->conf->individual_wep_key_len > 0) {
 312                 u8 *ikey;
 313                 ikey = os_malloc(hapd->conf->individual_wep_key_len);
 314                 if (ikey == NULL ||
 315                     os_get_random(ikey, hapd->conf->individual_wep_key_len)) {
 316                         wpa_printf(MSG_ERROR, "Could not generate random "
 317                                    "individual WEP key.");
 318                         os_free(ikey);
 319                         return;
 320                 }
 321
 322                 wpa_hexdump_key(MSG_DEBUG, "Individual WEP key",
 323                                 ikey, hapd->conf->individual_wep_key_len);
 324
 325                 ieee802_1x_tx_key_one(hapd, sta, 0, 0, ikey,
 326                                       hapd->conf->individual_wep_key_len);
 327
 328                 /* TODO: set encryption in TX callback, i.e., only after STA
 329                  * has ACKed EAPOL-Key frame */
 330                 if (hostapd_set_encryption(hapd->conf->iface, hapd, "WEP",
 331                                            sta->addr, 0, ikey,
 332                                            hapd->conf->individual_wep_key_len,
 333                                            1)) {
 334                         wpa_printf(MSG_ERROR, "Could not set individual WEP "
 335                                    "encryption.");
 336                 }
 337
 338                 os_free(ikey);
 339         }
 340 }
 341
 342
 343 const char *radius_mode_txt(struct hostapd_data *hapd)
 344 {
 345         if (hapd->iface->current_mode == NULL)
 346                 return "802.11";
 347
 348         switch (hapd->iface->current_mode->mode) {
 349         case HOSTAPD_MODE_IEEE80211A:
 350                 return "802.11a";
 351         case HOSTAPD_MODE_IEEE80211G:
 352                 return "802.11g";
 353         case HOSTAPD_MODE_IEEE80211B:
 354         default:
 355                 return "802.11b";
 356         }
 357 }
 358
 359
 360 int radius_sta_rate(struct hostapd_data *hapd, struct sta_info *sta)
 361 {
 362         int i;
 363         u8 rate = 0;
 364
 365         for (i = 0; i < sta->supported_rates_len; i++)
 366                 if ((sta->supported_rates[i] & 0x7f) > rate)
 367                         rate = sta->supported_rates[i] & 0x7f;
 368
 369         return rate;
 370 }
 371
 372
 373 static void ieee802_1x_learn_identity(struct hostapd_data *hapd,
 374                                       struct eapol_state_machine *sm,
 375                                       const u8 *eap, size_t len)
 376 {
 377         const u8 *identity;
 378         size_t identity_len;
 379
 380         if (len <= sizeof(struct eap_hdr) ||
 381             eap[sizeof(struct eap_hdr)] != EAP_TYPE_IDENTITY)
 382                 return;
 383
 384         identity = eap_get_identity(sm->eap, &identity_len);
 385         if (identity == NULL)
 386                 return;
 387
 388         /* Save station identity for future RADIUS packets */
 389         os_free(sm->identity);
 390         sm->identity = os_malloc(identity_len + 1);
 391         if (sm->identity == NULL) {
 392                 sm->identity_len = 0;
 393                 return;
 394         }
 395
 396         os_memcpy(sm->identity, identity, identity_len);
 397         sm->identity_len = identity_len;
 398         sm->identity[identity_len] = '\0';
 399         hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
 400                        HOSTAPD_LEVEL_DEBUG, "STA identity '%s'", sm->identity);
 401         sm->dot1xAuthEapolRespIdFramesRx++;
 402 }
 403
 404
 405 static void ieee802_1x_encapsulate_radius(struct hostapd_data *hapd,
 406                                           struct sta_info *sta,
 407                                           const u8 *eap, size_t len)
 408 {
 409         struct radius_msg *msg;
 410         char buf[128];
 411         struct eapol_state_machine *sm = sta->eapol_sm;
 412
 413         if (sm == NULL)
 414                 return;
 415
 416         ieee802_1x_learn_identity(hapd, sm, eap, len);
 417
 418         wpa_printf(MSG_DEBUG, "Encapsulating EAP message into a RADIUS "
 419                    "packet");
 420
 421         sm->radius_identifier = radius_client_get_id(hapd->radius);
 422         msg = radius_msg_new(RADIUS_CODE_ACCESS_REQUEST,
 423                              sm->radius_identifier);
 424         if (msg == NULL) {
 425                 printf("Could not create net RADIUS packet\n");
 426                 return;
 427         }
 428
 429         radius_msg_make_authenticator(msg, (u8 *) sta, sizeof(*sta));
 430
 431         if (sm->identity &&
 432             !radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME,
 433                                  sm->identity, sm->identity_len)) {
 434                 printf("Could not add User-Name\n");
 435                 goto fail;
 436         }
 437
 438         if (hapd->conf->own_ip_addr.af == AF_INET &&
 439             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS,
 440                                  (u8 *) &hapd->conf->own_ip_addr.u.v4, 4)) {
 441                 printf("Could not add NAS-IP-Address\n");
 442                 goto fail;
 443         }
 444
 445 #ifdef CONFIG_IPV6
 446         if (hapd->conf->own_ip_addr.af == AF_INET6 &&
 447             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IPV6_ADDRESS,
 448                                  (u8 *) &hapd->conf->own_ip_addr.u.v6, 16)) {
 449                 printf("Could not add NAS-IPv6-Address\n");
 450                 goto fail;
 451         }
 452 #endif /* CONFIG_IPV6 */
 453
 454         if (hapd->conf->nas_identifier &&
 455             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IDENTIFIER,
 456                                  (u8 *) hapd->conf->nas_identifier,
 457                                  os_strlen(hapd->conf->nas_identifier))) {
 458                 printf("Could not add NAS-Identifier\n");
 459                 goto fail;
 460         }
 461
 462         if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT, sta->aid)) {
 463                 printf("Could not add NAS-Port\n");
 464                 goto fail;
 465         }
 466
 467         os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT ":%s",
 468                     MAC2STR(hapd->own_addr), hapd->conf->ssid.ssid);
 469         buf[sizeof(buf) - 1] = '\0';
 470         if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLED_STATION_ID,
 471                                  (u8 *) buf, os_strlen(buf))) {
 472                 printf("Could not add Called-Station-Id\n");
 473                 goto fail;
 474         }
 475
 476         os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
 477                     MAC2STR(sta->addr));
 478         buf[sizeof(buf) - 1] = '\0';
 479         if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID,
 480                                  (u8 *) buf, os_strlen(buf))) {
 481                 printf("Could not add Calling-Station-Id\n");
 482                 goto fail;
 483         }
 484
 485         /* TODO: should probably check MTU from driver config; 2304 is max for
 486          * IEEE 802.11, but use 1400 to avoid problems with too large packets
 487          */
 488         if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_FRAMED_MTU, 1400)) {
 489                 printf("Could not add Framed-MTU\n");
 490                 goto fail;
 491         }
 492
 493         if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT_TYPE,
 494                                        RADIUS_NAS_PORT_TYPE_IEEE_802_11)) {
 495                 printf("Could not add NAS-Port-Type\n");
 496                 goto fail;
 497         }
 498
 499         if (sta->flags & WLAN_STA_PREAUTH) {
 500                 os_strlcpy(buf, "IEEE 802.11i Pre-Authentication",
 501                            sizeof(buf));
 502         } else {
 503                 os_snprintf(buf, sizeof(buf), "CONNECT %d%sMbps %s",
 504                             radius_sta_rate(hapd, sta) / 2,
 505                             (radius_sta_rate(hapd, sta) & 1) ? ".5" : "",
 506                             radius_mode_txt(hapd));
 507                 buf[sizeof(buf) - 1] = '\0';
 508         }
 509         if (!radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO,
 510                                  (u8 *) buf, os_strlen(buf))) {
 511                 printf("Could not add Connect-Info\n");
 512                 goto fail;
 513         }
 514
 515         if (eap && !radius_msg_add_eap(msg, eap, len)) {
 516                 printf("Could not add EAP-Message\n");
 517                 goto fail;
 518         }
 519
 520         /* State attribute must be copied if and only if this packet is
 521          * Access-Request reply to the previous Access-Challenge */
 522         if (sm->last_recv_radius && sm->last_recv_radius->hdr->code ==
 523             RADIUS_CODE_ACCESS_CHALLENGE) {
 524                 int res = radius_msg_copy_attr(msg, sm->last_recv_radius,
 525                                                RADIUS_ATTR_STATE);
 526                 if (res < 0) {
 527                         printf("Could not copy State attribute from previous "
 528                                "Access-Challenge\n");
 529                         goto fail;
 530                 }
 531                 if (res > 0) {
 532                         wpa_printf(MSG_DEBUG, "Copied RADIUS State Attribute");
 533                 }
 534         }
 535
 536         radius_client_send(hapd->radius, msg, RADIUS_AUTH, sta->addr);
 537         return;
 538
 539  fail:
 540         radius_msg_free(msg);
 541         os_free(msg);
 542 }
 543
 544
 545 char *eap_type_text(u8 type)
 546 {
 547         switch (type) {
 548         case EAP_TYPE_IDENTITY: return "Identity";
 549         case EAP_TYPE_NOTIFICATION: return "Notification";
 550         case EAP_TYPE_NAK: return "Nak";
 551         case EAP_TYPE_MD5: return "MD5-Challenge";
 552         case EAP_TYPE_OTP: return "One-Time Password";
 553         case EAP_TYPE_GTC: return "Generic Token Card";
 554         case EAP_TYPE_TLS: return "TLS";
 555         case EAP_TYPE_TTLS: return "TTLS";
 556         case EAP_TYPE_PEAP: return "PEAP";
 557         case EAP_TYPE_SIM: return "SIM";
 558         case EAP_TYPE_FAST: return "FAST";
 559         case EAP_TYPE_SAKE: return "SAKE";
 560         case EAP_TYPE_PSK: return "PSK";
 561         case EAP_TYPE_PAX: return "PAX";
 562         default: return "Unknown";
 563         }
 564 }
 565
 566
 567 static void handle_eap_response(struct hostapd_data *hapd,
 568                                 struct sta_info *sta, struct eap_hdr *eap,
 569                                 size_t len)
 570 {
 571         u8 type, *data;
 572         struct eapol_state_machine *sm = sta->eapol_sm;
 573         if (sm == NULL)
 574                 return;
 575
 576         data = (u8 *) (eap + 1);
 577
 578         if (len < sizeof(*eap) + 1) {
 579                 printf("handle_eap_response: too short response data\n");
 580                 return;
 581         }
 582
 583         sm->eap_type_supp = type = data[0];
 584
 585         hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
 586                        HOSTAPD_LEVEL_DEBUG, "received EAP packet (code=%d "
 587                        "id=%d len=%d) from STA: EAP Response-%s (%d)",
 588                        eap->code, eap->identifier, be_to_host16(eap->length),
 589                        eap_type_text(type), type);
 590
 591         sm->dot1xAuthEapolRespFramesRx++;
 592
 593         wpabuf_free(sm->eap_if->eapRespData);
 594         sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len);
 595         sm->eapolEap = TRUE;
 596 }
 597
 598
 599 /* Process incoming EAP packet from Supplicant */
 600 static void handle_eap(struct hostapd_data *hapd, struct sta_info *sta,
 601                        u8 *buf, size_t len)
 602 {
 603         struct eap_hdr *eap;
 604         u16 eap_len;
 605
 606         if (len < sizeof(*eap)) {
 607                 printf("   too short EAP packet\n");
 608                 return;
 609         }
 610
 611         eap = (struct eap_hdr *) buf;
 612
 613         eap_len = be_to_host16(eap->length);
 614         wpa_printf(MSG_DEBUG, "EAP: code=%d identifier=%d length=%d",
 615                    eap->code, eap->identifier, eap_len);
 616         if (eap_len < sizeof(*eap)) {
 617                 wpa_printf(MSG_DEBUG, "   Invalid EAP length");
 618                 return;
 619         } else if (eap_len > len) {
 620                 wpa_printf(MSG_DEBUG, "   Too short frame to contain this EAP "
 621                            "packet");
 622                 return;
 623         } else if (eap_len < len) {
 624                 wpa_printf(MSG_DEBUG, "   Ignoring %lu extra bytes after EAP "
 625                            "packet", (unsigned long) len - eap_len);
 626         }
 627
 628         switch (eap->code) {
 629         case EAP_CODE_REQUEST:
 630                 wpa_printf(MSG_DEBUG, " (request)");
 631                 return;
 632         case EAP_CODE_RESPONSE:
 633                 wpa_printf(MSG_DEBUG, " (response)");
 634                 handle_eap_response(hapd, sta, eap, eap_len);
 635                 break;
 636         case EAP_CODE_SUCCESS:
 637                 wpa_printf(MSG_DEBUG, " (success)");
 638                 return;
 639         case EAP_CODE_FAILURE:
 640                 wpa_printf(MSG_DEBUG, " (failure)");
 641                 return;
 642         default:
 643                 wpa_printf(MSG_DEBUG, " (unknown code)");
 644                 return;
 645         }
 646 }
 647
 648
 649 /* Process the EAPOL frames from the Supplicant */
 650 void ieee802_1x_receive(struct hostapd_data *hapd, const u8 *sa, const u8 *buf,
 651                         size_t len)
 652 {
 653         struct sta_info *sta;
 654         struct ieee802_1x_hdr *hdr;
 655         struct ieee802_1x_eapol_key *key;
 656         u16 datalen;
 657         struct rsn_pmksa_cache_entry *pmksa;
 658
 659         if (!hapd->conf->ieee802_1x && !hapd->conf->wpa &&
 660             !hapd->conf->wps_state)
 661                 return;
 662
 663         wpa_printf(MSG_DEBUG, "IEEE 802.1X: %lu bytes from " MACSTR,
 664                    (unsigned long) len, MAC2STR(sa));
 665         sta = ap_get_sta(hapd, sa);
 666         if (!sta) {
 667                 printf("   no station information available\n");
 668                 return;
 669         }
 670
 671         if (len < sizeof(*hdr)) {
 672                 printf("   too short IEEE 802.1X packet\n");
 673                 return;
 674         }
 675
 676         hdr = (struct ieee802_1x_hdr *) buf;
 677         datalen = be_to_host16(hdr->length);
 678         wpa_printf(MSG_DEBUG, "   IEEE 802.1X: version=%d type=%d length=%d",
 679                    hdr->version, hdr->type, datalen);
 680
 681         if (len - sizeof(*hdr) < datalen) {
 682                 printf("   frame too short for this IEEE 802.1X packet\n");
 683                 if (sta->eapol_sm)
 684                         sta->eapol_sm->dot1xAuthEapLengthErrorFramesRx++;
 685                 return;
 686         }
 687         if (len - sizeof(*hdr) > datalen) {
 688                 wpa_printf(MSG_DEBUG, "   ignoring %lu extra octets after "
 689                            "IEEE 802.1X packet",
 690                            (unsigned long) len - sizeof(*hdr) - datalen);
 691         }
 692
 693         if (sta->eapol_sm) {
 694                 sta->eapol_sm->dot1xAuthLastEapolFrameVersion = hdr->version;
 695                 sta->eapol_sm->dot1xAuthEapolFramesRx++;
 696         }
 697
 698         key = (struct ieee802_1x_eapol_key *) (hdr + 1);
 699         if (datalen >= sizeof(struct ieee802_1x_eapol_key) &&
 700             hdr->type == IEEE802_1X_TYPE_EAPOL_KEY &&
 701             (key->type == EAPOL_KEY_TYPE_WPA ||
 702              key->type == EAPOL_KEY_TYPE_RSN)) {
 703                 wpa_receive(hapd->wpa_auth, sta->wpa_sm, (u8 *) hdr,
 704                             sizeof(*hdr) + datalen);
 705                 return;
 706         }
 707
 708         if ((!hapd->conf->ieee802_1x &&
 709              !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) ||
 710             wpa_key_mgmt_wpa_psk(wpa_auth_sta_key_mgmt(sta->wpa_sm)))
 711                 return;
 712
 713         if (!sta->eapol_sm) {
 714                 sta->eapol_sm = eapol_auth_alloc(hapd->eapol_auth, sta->addr,
 715                                                  sta->flags & WLAN_STA_PREAUTH,
 716                                                  sta);
 717                 if (!sta->eapol_sm)
 718                         return;
 719
 720 #ifdef CONFIG_WPS
 721                 if (!hapd->conf->ieee802_1x &&
 722                     ((sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) ==
 723                      WLAN_STA_MAYBE_WPS)) {
 724                         /*
 725                          * Delay EAPOL frame transmission until a possible WPS
 726                          * STA initiates the handshake with EAPOL-Start.
 727                          */
 728                         sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
 729                 }
 730 #endif /* CONFIG_WPS */
 731         }
 732
 733         /* since we support version 1, we can ignore version field and proceed
 734          * as specified in version 1 standard [IEEE Std 802.1X-2001, 7.5.5] */
 735         /* TODO: actually, we are not version 1 anymore.. However, Version 2
 736          * does not change frame contents, so should be ok to process frames
 737          * more or less identically. Some changes might be needed for
 738          * verification of fields. */
 739
 740         switch (hdr->type) {
 741         case IEEE802_1X_TYPE_EAP_PACKET:
 742                 handle_eap(hapd, sta, (u8 *) (hdr + 1), datalen);
 743                 break;
 744
 745         case IEEE802_1X_TYPE_EAPOL_START:
 746                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 747                                HOSTAPD_LEVEL_DEBUG, "received EAPOL-Start "
 748                                "from STA");
 749                 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
 750                 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
 751                 if (pmksa) {
 752                         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
 753                                        HOSTAPD_LEVEL_DEBUG, "cached PMKSA "
 754                                        "available - ignore it since "
 755                                        "STA sent EAPOL-Start");
 756                         wpa_auth_sta_clear_pmksa(sta->wpa_sm, pmksa);
 757                 }
 758                 sta->eapol_sm->eapolStart = TRUE;
 759                 sta->eapol_sm->dot1xAuthEapolStartFramesRx++;
 760                 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
 761                 break;
 762
 763         case IEEE802_1X_TYPE_EAPOL_LOGOFF:
 764                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 765                                HOSTAPD_LEVEL_DEBUG, "received EAPOL-Logoff "
 766                                "from STA");
 767                 sta->acct_terminate_cause =
 768                         RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
 769                 accounting_sta_stop(hapd, sta);
 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 #ifdef CONFIG_WPS
 805         if (hapd->conf->wps_state &&
 806             (sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) {
 807                 /*
 808                  * Need to enable IEEE 802.1X/EAPOL state machines for possible
 809                  * WPS handshake even if IEEE 802.1X/EAPOL is not used for
 810                  * authentication in this BSS.
 811                  */
 812                 force_1x = 1;
 813         }
 814 #endif /* CONFIG_WPS */
 815
 816         if ((!force_1x && !hapd->conf->ieee802_1x) ||
 817             wpa_key_mgmt_wpa_psk(wpa_auth_sta_key_mgmt(sta->wpa_sm)))
 818                 return;
 819
 820         if (sta->eapol_sm == NULL) {
 821                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 822                                HOSTAPD_LEVEL_DEBUG, "start authentication");
 823                 sta->eapol_sm = eapol_auth_alloc(hapd->eapol_auth, sta->addr,
 824                                                  sta->flags & WLAN_STA_PREAUTH,
 825                                                  sta);
 826                 if (sta->eapol_sm == NULL) {
 827                         hostapd_logger(hapd, sta->addr,
 828                                        HOSTAPD_MODULE_IEEE8021X,
 829                                        HOSTAPD_LEVEL_INFO,
 830                                        "failed to allocate state machine");
 831                         return;
 832                 }
 833                 reassoc = 0;
 834         }
 835
 836 #ifdef CONFIG_WPS
 837         sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
 838         if (!hapd->conf->ieee802_1x && !(sta->flags & WLAN_STA_WPS)) {
 839                 /*
 840                  * Delay EAPOL frame transmission until a possible WPS
 841                  * initiates the handshake with EAPOL-Start.
 842                  */
 843                 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
 844         }
 845 #endif /* CONFIG_WPS */
 846
 847         sta->eapol_sm->eap_if->portEnabled = TRUE;
 848
 849         pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
 850         if (pmksa) {
 851                 int old_vlanid;
 852
 853                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 854                                HOSTAPD_LEVEL_DEBUG,
 855                                "PMK from PMKSA cache - skip IEEE 802.1X/EAP");
 856                 /* Setup EAPOL state machines to already authenticated state
 857                  * because of existing PMKSA information in the cache. */
 858                 sta->eapol_sm->keyRun = TRUE;
 859                 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
 860                 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
 861                 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
 862                 sta->eapol_sm->authSuccess = TRUE;
 863                 if (sta->eapol_sm->eap)
 864                         eap_sm_notify_cached(sta->eapol_sm->eap);
 865                 old_vlanid = sta->vlan_id;
 866                 pmksa_cache_to_eapol_data(pmksa, sta->eapol_sm);
 867                 if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
 868                         sta->vlan_id = 0;
 869                 ap_sta_bind_vlan(hapd, sta, old_vlanid);
 870         } else {
 871                 if (reassoc) {
 872                         /*
 873                          * Force EAPOL state machines to start
 874                          * re-authentication without having to wait for the
 875                          * Supplicant to send EAPOL-Start.
 876                          */
 877                         sta->eapol_sm->reAuthenticate = TRUE;
 878                 }
 879                 eapol_auth_step(sta->eapol_sm);
 880         }
 881 }
 882
 883
 884 void ieee802_1x_free_radius_class(struct radius_class_data *class)
 885 {
 886         size_t i;
 887         if (class == NULL)
 888                 return;
 889         for (i = 0; i < class->count; i++)
 890                 os_free(class->attr[i].data);
 891         os_free(class->attr);
 892         class->attr = NULL;
 893         class->count = 0;
 894 }
 895
 896
 897 int ieee802_1x_copy_radius_class(struct radius_class_data *dst,
 898                                  const struct radius_class_data *src)
 899 {
 900         size_t i;
 901
 902         if (src->attr == NULL)
 903                 return 0;
 904
 905         dst->attr = os_zalloc(src->count * sizeof(struct radius_attr_data));
 906         if (dst->attr == NULL)
 907                 return -1;
 908
 909         dst->count = 0;
 910
 911         for (i = 0; i < src->count; i++) {
 912                 dst->attr[i].data = os_malloc(src->attr[i].len);
 913                 if (dst->attr[i].data == NULL)
 914                         break;
 915                 dst->count++;
 916                 os_memcpy(dst->attr[i].data, src->attr[i].data,
 917                           src->attr[i].len);
 918                 dst->attr[i].len = src->attr[i].len;
 919         }
 920
 921         return 0;
 922 }
 923
 924
 925 void ieee802_1x_free_station(struct sta_info *sta)
 926 {
 927         struct eapol_state_machine *sm = sta->eapol_sm;
 928
 929         if (sm == NULL)
 930                 return;
 931
 932         sta->eapol_sm = NULL;
 933
 934         if (sm->last_recv_radius) {
 935                 radius_msg_free(sm->last_recv_radius);
 936                 os_free(sm->last_recv_radius);
 937         }
 938
 939         os_free(sm->identity);
 940         ieee802_1x_free_radius_class(&sm->radius_class);
 941         eapol_auth_free(sm);
 942 }
 943
 944
 945 static void ieee802_1x_decapsulate_radius(struct hostapd_data *hapd,
 946                                           struct sta_info *sta)
 947 {
 948         u8 *eap;
 949         size_t len;
 950         struct eap_hdr *hdr;
 951         int eap_type = -1;
 952         char buf[64];
 953         struct radius_msg *msg;
 954         struct eapol_state_machine *sm = sta->eapol_sm;
 955
 956         if (sm == NULL || sm->last_recv_radius == NULL) {
 957                 if (sm)
 958                         sm->eap_if->aaaEapNoReq = TRUE;
 959                 return;
 960         }
 961
 962         msg = sm->last_recv_radius;
 963
 964         eap = radius_msg_get_eap(msg, &len);
 965         if (eap == NULL) {
 966                 /* RFC 3579, Chap. 2.6.3:
 967                  * RADIUS server SHOULD NOT send Access-Reject/no EAP-Message
 968                  * attribute */
 969                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 970                                HOSTAPD_LEVEL_WARNING, "could not extract "
 971                                "EAP-Message from RADIUS message");
 972                 sm->eap_if->aaaEapNoReq = TRUE;
 973                 return;
 974         }
 975
 976         if (len < sizeof(*hdr)) {
 977                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 978                                HOSTAPD_LEVEL_WARNING, "too short EAP packet "
 979                                "received from authentication server");
 980                 os_free(eap);
 981                 sm->eap_if->aaaEapNoReq = TRUE;
 982                 return;
 983         }
 984
 985         if (len > sizeof(*hdr))
 986                 eap_type = eap[sizeof(*hdr)];
 987
 988         hdr = (struct eap_hdr *) eap;
 989         switch (hdr->code) {
 990         case EAP_CODE_REQUEST:
 991                 if (eap_type >= 0)
 992                         sm->eap_type_authsrv = eap_type;
 993                 os_snprintf(buf, sizeof(buf), "EAP-Request-%s (%d)",
 994                             eap_type >= 0 ? eap_type_text(eap_type) : "??",
 995                             eap_type);
 996                 break;
 997         case EAP_CODE_RESPONSE:
 998                 os_snprintf(buf, sizeof(buf), "EAP Response-%s (%d)",
 999                             eap_type >= 0 ? eap_type_text(eap_type) : "??",
1000                             eap_type);
1001                 break;
1002         case EAP_CODE_SUCCESS:
1003                 os_strlcpy(buf, "EAP Success", sizeof(buf));
1004                 break;
1005         case EAP_CODE_FAILURE:
1006                 os_strlcpy(buf, "EAP Failure", sizeof(buf));
1007                 break;
1008         default:
1009                 os_strlcpy(buf, "unknown EAP code", sizeof(buf));
1010                 break;
1011         }
1012         buf[sizeof(buf) - 1] = '\0';
1013         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1014                        HOSTAPD_LEVEL_DEBUG, "decapsulated EAP packet (code=%d "
1015                        "id=%d len=%d) from RADIUS server: %s",
1016                        hdr->code, hdr->identifier, be_to_host16(hdr->length),
1017                        buf);
1018         sm->eap_if->aaaEapReq = TRUE;
1019
1020         wpabuf_free(sm->eap_if->aaaEapReqData);
1021         sm->eap_if->aaaEapReqData = wpabuf_alloc_ext_data(eap, len);
1022 }
1023
1024
1025 static void ieee802_1x_get_keys(struct hostapd_data *hapd,
1026                                 struct sta_info *sta, struct radius_msg *msg,
1027                                 struct radius_msg *req,
1028                                 u8 *shared_secret, size_t shared_secret_len)
1029 {
1030         struct radius_ms_mppe_keys *keys;
1031         struct eapol_state_machine *sm = sta->eapol_sm;
1032         if (sm == NULL)
1033                 return;
1034
1035         keys = radius_msg_get_ms_keys(msg, req, shared_secret,
1036                                       shared_secret_len);
1037
1038         if (keys && keys->send && keys->recv) {
1039                 size_t len = keys->send_len + keys->recv_len;
1040                 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Send-Key",
1041                                 keys->send, keys->send_len);
1042                 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Recv-Key",
1043                                 keys->recv, keys->recv_len);
1044
1045                 os_free(sm->eap_if->aaaEapKeyData);
1046                 sm->eap_if->aaaEapKeyData = os_malloc(len);
1047                 if (sm->eap_if->aaaEapKeyData) {
1048                         os_memcpy(sm->eap_if->aaaEapKeyData, keys->recv,
1049                                   keys->recv_len);
1050                         os_memcpy(sm->eap_if->aaaEapKeyData + keys->recv_len,
1051                                   keys->send, keys->send_len);
1052                         sm->eap_if->aaaEapKeyDataLen = len;
1053                         sm->eap_if->aaaEapKeyAvailable = TRUE;
1054                 }
1055         }
1056
1057         if (keys) {
1058                 os_free(keys->send);
1059                 os_free(keys->recv);
1060                 os_free(keys);
1061         }
1062 }
1063
1064
1065 static void ieee802_1x_store_radius_class(struct hostapd_data *hapd,
1066                                           struct sta_info *sta,
1067                                           struct radius_msg *msg)
1068 {
1069         u8 *class;
1070         size_t class_len;
1071         struct eapol_state_machine *sm = sta->eapol_sm;
1072         int count, i;
1073         struct radius_attr_data *nclass;
1074         size_t nclass_count;
1075
1076         if (!hapd->conf->radius->acct_server || hapd->radius == NULL ||
1077             sm == NULL)
1078                 return;
1079
1080         ieee802_1x_free_radius_class(&sm->radius_class);
1081         count = radius_msg_count_attr(msg, RADIUS_ATTR_CLASS, 1);
1082         if (count <= 0)
1083                 return;
1084
1085         nclass = os_zalloc(count * sizeof(struct radius_attr_data));
1086         if (nclass == NULL)
1087                 return;
1088
1089         nclass_count = 0;
1090
1091         class = NULL;
1092         for (i = 0; i < count; i++) {
1093                 do {
1094                         if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CLASS,
1095                                                     &class, &class_len,
1096                                                     class) < 0) {
1097                                 i = count;
1098                                 break;
1099                         }
1100                 } while (class_len < 1);
1101
1102                 nclass[nclass_count].data = os_malloc(class_len);
1103                 if (nclass[nclass_count].data == NULL)
1104                         break;
1105
1106                 os_memcpy(nclass[nclass_count].data, class, class_len);
1107                 nclass[nclass_count].len = class_len;
1108                 nclass_count++;
1109         }
1110
1111         sm->radius_class.attr = nclass;
1112         sm->radius_class.count = nclass_count;
1113         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Stored %lu RADIUS Class "
1114                    "attributes for " MACSTR,
1115                    (unsigned long) sm->radius_class.count,
1116                    MAC2STR(sta->addr));
1117 }
1118
1119
1120 /* Update sta->identity based on User-Name attribute in Access-Accept */
1121 static void ieee802_1x_update_sta_identity(struct hostapd_data *hapd,
1122                                            struct sta_info *sta,
1123                                            struct radius_msg *msg)
1124 {
1125         u8 *buf, *identity;
1126         size_t len;
1127         struct eapol_state_machine *sm = sta->eapol_sm;
1128
1129         if (sm == NULL)
1130                 return;
1131
1132         if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_USER_NAME, &buf, &len,
1133                                     NULL) < 0)
1134                 return;
1135
1136         identity = os_malloc(len + 1);
1137         if (identity == NULL)
1138                 return;
1139
1140         os_memcpy(identity, buf, len);
1141         identity[len] = '\0';
1142
1143         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1144                        HOSTAPD_LEVEL_DEBUG, "old identity '%s' updated with "
1145                        "User-Name from Access-Accept '%s'",
1146                        sm->identity ? (char *) sm->identity : "N/A",
1147                        (char *) identity);
1148
1149         os_free(sm->identity);
1150         sm->identity = identity;
1151         sm->identity_len = len;
1152 }
1153
1154
1155 struct sta_id_search {
1156         u8 identifier;
1157         struct eapol_state_machine *sm;
1158 };
1159
1160
1161 static int ieee802_1x_select_radius_identifier(struct hostapd_data *hapd,
1162                                                struct sta_info *sta,
1163                                                void *ctx)
1164 {
1165         struct sta_id_search *id_search = ctx;
1166         struct eapol_state_machine *sm = sta->eapol_sm;
1167
1168         if (sm && sm->radius_identifier >= 0 &&
1169             sm->radius_identifier == id_search->identifier) {
1170                 id_search->sm = sm;
1171                 return 1;
1172         }
1173         return 0;
1174 }
1175
1176
1177 static struct eapol_state_machine *
1178 ieee802_1x_search_radius_identifier(struct hostapd_data *hapd, u8 identifier)
1179 {
1180         struct sta_id_search id_search;
1181         id_search.identifier = identifier;
1182         id_search.sm = NULL;
1183         ap_for_each_sta(hapd, ieee802_1x_select_radius_identifier, &id_search);
1184         return id_search.sm;
1185 }
1186
1187
1188 /* Process the RADIUS frames from Authentication Server */
1189 static RadiusRxResult
1190 ieee802_1x_receive_auth(struct radius_msg *msg, struct radius_msg *req,
1191                         u8 *shared_secret, size_t shared_secret_len,
1192                         void *data)
1193 {
1194         struct hostapd_data *hapd = data;
1195         struct sta_info *sta;
1196         u32 session_timeout = 0, termination_action, acct_interim_interval;
1197         int session_timeout_set, old_vlanid = 0;
1198         struct eapol_state_machine *sm;
1199         int override_eapReq = 0;
1200
1201         sm = ieee802_1x_search_radius_identifier(hapd, msg->hdr->identifier);
1202         if (sm == NULL) {
1203                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Could not find matching "
1204                            "station for this RADIUS message");
1205                 return RADIUS_RX_UNKNOWN;
1206         }
1207         sta = sm->sta;
1208
1209         /* RFC 2869, Ch. 5.13: valid Message-Authenticator attribute MUST be
1210          * present when packet contains an EAP-Message attribute */
1211         if (msg->hdr->code == RADIUS_CODE_ACCESS_REJECT &&
1212             radius_msg_get_attr(msg, RADIUS_ATTR_MESSAGE_AUTHENTICATOR, NULL,
1213                                 0) < 0 &&
1214             radius_msg_get_attr(msg, RADIUS_ATTR_EAP_MESSAGE, NULL, 0) < 0) {
1215                 wpa_printf(MSG_DEBUG, "Allowing RADIUS Access-Reject without "
1216                            "Message-Authenticator since it does not include "
1217                            "EAP-Message");
1218         } else if (radius_msg_verify(msg, shared_secret, shared_secret_len,
1219                                      req, 1)) {
1220                 printf("Incoming RADIUS packet did not have correct "
1221                        "Message-Authenticator - dropped\n");
1222                 return RADIUS_RX_INVALID_AUTHENTICATOR;
1223         }
1224
1225         if (msg->hdr->code != RADIUS_CODE_ACCESS_ACCEPT &&
1226             msg->hdr->code != RADIUS_CODE_ACCESS_REJECT &&
1227             msg->hdr->code != RADIUS_CODE_ACCESS_CHALLENGE) {
1228                 printf("Unknown RADIUS message code\n");
1229                 return RADIUS_RX_UNKNOWN;
1230         }
1231
1232         sm->radius_identifier = -1;
1233         wpa_printf(MSG_DEBUG, "RADIUS packet matching with station " MACSTR,
1234                    MAC2STR(sta->addr));
1235
1236         if (sm->last_recv_radius) {
1237                 radius_msg_free(sm->last_recv_radius);
1238                 os_free(sm->last_recv_radius);
1239         }
1240
1241         sm->last_recv_radius = msg;
1242
1243         session_timeout_set =
1244                 !radius_msg_get_attr_int32(msg, RADIUS_ATTR_SESSION_TIMEOUT,
1245                                            &session_timeout);
1246         if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_TERMINATION_ACTION,
1247                                       &termination_action))
1248                 termination_action = RADIUS_TERMINATION_ACTION_DEFAULT;
1249
1250         if (hapd->conf->radius->acct_interim_interval == 0 &&
1251             msg->hdr->code == RADIUS_CODE_ACCESS_ACCEPT &&
1252             radius_msg_get_attr_int32(msg, RADIUS_ATTR_ACCT_INTERIM_INTERVAL,
1253                                       &acct_interim_interval) == 0) {
1254                 if (acct_interim_interval < 60) {
1255                         hostapd_logger(hapd, sta->addr,
1256                                        HOSTAPD_MODULE_IEEE8021X,
1257                                        HOSTAPD_LEVEL_INFO,
1258                                        "ignored too small "
1259                                        "Acct-Interim-Interval %d",
1260                                        acct_interim_interval);
1261                 } else
1262                         sta->acct_interim_interval = acct_interim_interval;
1263         }
1264
1265
1266         switch (msg->hdr->code) {
1267         case RADIUS_CODE_ACCESS_ACCEPT:
1268                 if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
1269                         sta->vlan_id = 0;
1270                 else {
1271                         old_vlanid = sta->vlan_id;
1272                         sta->vlan_id = radius_msg_get_vlanid(msg);
1273                 }
1274                 if (sta->vlan_id > 0 &&
1275                     hostapd_get_vlan_id_ifname(hapd->conf->vlan,
1276                                                sta->vlan_id)) {
1277                         hostapd_logger(hapd, sta->addr,
1278                                        HOSTAPD_MODULE_RADIUS,
1279                                        HOSTAPD_LEVEL_INFO,
1280                                        "VLAN ID %d", sta->vlan_id);
1281                 } else if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_REQUIRED) {
1282                         sta->eapol_sm->authFail = TRUE;
1283                         hostapd_logger(hapd, sta->addr,
1284                                        HOSTAPD_MODULE_IEEE8021X,
1285                                        HOSTAPD_LEVEL_INFO, "authentication "
1286                                        "server did not include required VLAN "
1287                                        "ID in Access-Accept");
1288                         break;
1289                 }
1290
1291                 ap_sta_bind_vlan(hapd, sta, old_vlanid);
1292
1293                 /* RFC 3580, Ch. 3.17 */
1294                 if (session_timeout_set && termination_action ==
1295                     RADIUS_TERMINATION_ACTION_RADIUS_REQUEST) {
1296                         sm->reAuthPeriod = session_timeout;
1297                 } else if (session_timeout_set)
1298                         ap_sta_session_timeout(hapd, sta, session_timeout);
1299
1300                 sm->eap_if->aaaSuccess = TRUE;
1301                 override_eapReq = 1;
1302                 ieee802_1x_get_keys(hapd, sta, msg, req, shared_secret,
1303                                     shared_secret_len);
1304                 ieee802_1x_store_radius_class(hapd, sta, msg);
1305                 ieee802_1x_update_sta_identity(hapd, sta, msg);
1306                 if (sm->eap_if->eapKeyAvailable &&
1307                     wpa_auth_pmksa_add(sta->wpa_sm, sm->eapol_key_crypt,
1308                                        session_timeout_set ?
1309                                        (int) session_timeout : -1, sm) == 0) {
1310                         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
1311                                        HOSTAPD_LEVEL_DEBUG,
1312                                        "Added PMKSA cache entry");
1313                 }
1314                 break;
1315         case RADIUS_CODE_ACCESS_REJECT:
1316                 sm->eap_if->aaaFail = TRUE;
1317                 override_eapReq = 1;
1318                 break;
1319         case RADIUS_CODE_ACCESS_CHALLENGE:
1320                 sm->eap_if->aaaEapReq = TRUE;
1321                 if (session_timeout_set) {
1322                         /* RFC 2869, Ch. 2.3.2; RFC 3580, Ch. 3.17 */
1323                         sm->eap_if->aaaMethodTimeout = session_timeout;
1324                         hostapd_logger(hapd, sm->addr,
1325                                        HOSTAPD_MODULE_IEEE8021X,
1326                                        HOSTAPD_LEVEL_DEBUG,
1327                                        "using EAP timeout of %d seconds (from "
1328                                        "RADIUS)",
1329                                        sm->eap_if->aaaMethodTimeout);
1330                 } else {
1331                         /*
1332                          * Use dynamic retransmission behavior per EAP
1333                          * specification.
1334                          */
1335                         sm->eap_if->aaaMethodTimeout = 0;
1336                 }
1337                 break;
1338         }
1339
1340         ieee802_1x_decapsulate_radius(hapd, sta);
1341         if (override_eapReq)
1342                 sm->eap_if->aaaEapReq = FALSE;
1343
1344         eapol_auth_step(sm);
1345
1346         return RADIUS_RX_QUEUED;
1347 }
1348
1349
1350 void ieee802_1x_abort_auth(struct hostapd_data *hapd, struct sta_info *sta)
1351 {
1352         struct eapol_state_machine *sm = sta->eapol_sm;
1353         if (sm == NULL)
1354                 return;
1355
1356         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1357                        HOSTAPD_LEVEL_DEBUG, "aborting authentication");
1358
1359         if (sm->last_recv_radius) {
1360                 radius_msg_free(sm->last_recv_radius);
1361                 os_free(sm->last_recv_radius);
1362                 sm->last_recv_radius = NULL;
1363         }
1364 }
1365
1366
1367 #ifdef HOSTAPD_DUMP_STATE
1368 static void fprint_char(FILE *f, char c)
1369 {
1370         if (c >= 32 && c < 127)
1371                 fprintf(f, "%c", c);
1372         else
1373                 fprintf(f, "<%02x>", c);
1374 }
1375
1376
1377 void ieee802_1x_dump_state(FILE *f, const char *prefix, struct sta_info *sta)
1378 {
1379         struct eapol_state_machine *sm = sta->eapol_sm;
1380         if (sm == NULL)
1381                 return;
1382
1383         fprintf(f, "%sIEEE 802.1X:\n", prefix);
1384
1385         if (sm->identity) {
1386                 size_t i;
1387                 fprintf(f, "%sidentity=", prefix);
1388                 for (i = 0; i < sm->identity_len; i++)
1389                         fprint_char(f, sm->identity[i]);
1390                 fprintf(f, "\n");
1391         }
1392
1393         fprintf(f, "%slast EAP type: Authentication Server: %d (%s) "
1394                 "Supplicant: %d (%s)\n", prefix,
1395                 sm->eap_type_authsrv, eap_type_text(sm->eap_type_authsrv),
1396                 sm->eap_type_supp, eap_type_text(sm->eap_type_supp));
1397
1398         fprintf(f, "%scached_packets=%s\n", prefix,
1399                 sm->last_recv_radius ? "[RX RADIUS]" : "");
1400
1401         eapol_auth_dump_state(f, prefix, sm);
1402 }
1403 #endif /* HOSTAPD_DUMP_STATE */
1404
1405
1406 static int ieee802_1x_rekey_broadcast(struct hostapd_data *hapd)
1407 {
1408         if (hapd->conf->default_wep_key_len < 1)
1409                 return 0;
1410
1411         os_free(hapd->default_wep_key);
1412         hapd->default_wep_key = os_malloc(hapd->conf->default_wep_key_len);
1413         if (hapd->default_wep_key == NULL ||
1414             os_get_random(hapd->default_wep_key,
1415                           hapd->conf->default_wep_key_len)) {
1416                 printf("Could not generate random WEP key.\n");
1417                 os_free(hapd->default_wep_key);
1418                 hapd->default_wep_key = NULL;
1419                 return -1;
1420         }
1421
1422         wpa_hexdump_key(MSG_DEBUG, "IEEE 802.1X: New default WEP key",
1423                         hapd->default_wep_key,
1424                         hapd->conf->default_wep_key_len);
1425
1426         return 0;
1427 }
1428
1429
1430 static int ieee802_1x_sta_key_available(struct hostapd_data *hapd,
1431                                         struct sta_info *sta, void *ctx)
1432 {
1433         if (sta->eapol_sm) {
1434                 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
1435                 eapol_auth_step(sta->eapol_sm);
1436         }
1437         return 0;
1438 }
1439
1440
1441 static void ieee802_1x_rekey(void *eloop_ctx, void *timeout_ctx)
1442 {
1443         struct hostapd_data *hapd = eloop_ctx;
1444
1445         if (hapd->default_wep_key_idx >= 3)
1446                 hapd->default_wep_key_idx =
1447                         hapd->conf->individual_wep_key_len > 0 ? 1 : 0;
1448         else
1449                 hapd->default_wep_key_idx++;
1450
1451         wpa_printf(MSG_DEBUG, "IEEE 802.1X: New default WEP key index %d",
1452                    hapd->default_wep_key_idx);
1453
1454         if (ieee802_1x_rekey_broadcast(hapd)) {
1455                 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1456                                HOSTAPD_LEVEL_WARNING, "failed to generate a "
1457                                "new broadcast key");
1458                 os_free(hapd->default_wep_key);
1459                 hapd->default_wep_key = NULL;
1460                 return;
1461         }
1462
1463         /* TODO: Could setup key for RX here, but change default TX keyid only
1464          * after new broadcast key has been sent to all stations. */
1465         if (hostapd_set_encryption(hapd->conf->iface, hapd, "WEP", NULL,
1466                                    hapd->default_wep_key_idx,
1467                                    hapd->default_wep_key,
1468                                    hapd->conf->default_wep_key_len, 1)) {
1469                 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1470                                HOSTAPD_LEVEL_WARNING, "failed to configure a "
1471                                "new broadcast key");
1472                 os_free(hapd->default_wep_key);
1473                 hapd->default_wep_key = NULL;
1474                 return;
1475         }
1476
1477         ap_for_each_sta(hapd, ieee802_1x_sta_key_available, NULL);
1478
1479         if (hapd->conf->wep_rekeying_period > 0) {
1480                 eloop_register_timeout(hapd->conf->wep_rekeying_period, 0,
1481                                        ieee802_1x_rekey, hapd, NULL);
1482         }
1483 }
1484
1485
1486 static void ieee802_1x_eapol_send(void *ctx, void *sta_ctx, u8 type,
1487                                   const u8 *data, size_t datalen)
1488 {
1489         ieee802_1x_send(ctx, sta_ctx, type, data, datalen);
1490 }
1491
1492
1493 static void ieee802_1x_aaa_send(void *ctx, void *sta_ctx,
1494                                 const u8 *data, size_t datalen)
1495 {
1496         struct hostapd_data *hapd = ctx;
1497         struct sta_info *sta = sta_ctx;
1498
1499         ieee802_1x_encapsulate_radius(hapd, sta, data, datalen);
1500 }
1501
1502
1503 static void _ieee802_1x_finished(void *ctx, void *sta_ctx, int success,
1504                                  int preauth)
1505 {
1506         struct hostapd_data *hapd = ctx;
1507         struct sta_info *sta = sta_ctx;
1508         if (preauth)
1509                 rsn_preauth_finished(hapd, sta, success);
1510         else
1511                 ieee802_1x_finished(hapd, sta, success);
1512 }
1513
1514
1515 static int ieee802_1x_get_eap_user(void *ctx, const u8 *identity,
1516                                    size_t identity_len, int phase2,
1517                                    struct eap_user *user)
1518 {
1519         struct hostapd_data *hapd = ctx;
1520         const struct hostapd_eap_user *eap_user;
1521         int i, count;
1522
1523         eap_user = hostapd_get_eap_user(hapd->conf, identity,
1524                                         identity_len, phase2);
1525         if (eap_user == NULL)
1526                 return -1;
1527
1528         os_memset(user, 0, sizeof(*user));
1529         user->phase2 = phase2;
1530         count = EAP_USER_MAX_METHODS;
1531         if (count > EAP_MAX_METHODS)
1532                 count = EAP_MAX_METHODS;
1533         for (i = 0; i < count; i++) {
1534                 user->methods[i].vendor = eap_user->methods[i].vendor;
1535                 user->methods[i].method = eap_user->methods[i].method;
1536         }
1537
1538         if (eap_user->password) {
1539                 user->password = os_malloc(eap_user->password_len);
1540                 if (user->password == NULL)
1541                         return -1;
1542                 os_memcpy(user->password, eap_user->password,
1543                           eap_user->password_len);
1544                 user->password_len = eap_user->password_len;
1545         }
1546         user->force_version = eap_user->force_version;
1547         user->ttls_auth = eap_user->ttls_auth;
1548
1549         return 0;
1550 }
1551
1552
1553 static int ieee802_1x_sta_entry_alive(void *ctx, const u8 *addr)
1554 {
1555         struct hostapd_data *hapd = ctx;
1556         struct sta_info *sta;
1557         sta = ap_get_sta(hapd, addr);
1558         if (sta == NULL || sta->eapol_sm == NULL)
1559                 return 0;
1560         return 1;
1561 }
1562
1563
1564 static void ieee802_1x_logger(void *ctx, const u8 *addr,
1565                               eapol_logger_level level, const char *txt)
1566 {
1567         struct hostapd_data *hapd = ctx;
1568         int hlevel;
1569
1570         switch (level) {
1571         case EAPOL_LOGGER_WARNING:
1572                 hlevel = HOSTAPD_LEVEL_WARNING;
1573                 break;
1574         case EAPOL_LOGGER_INFO:
1575                 hlevel = HOSTAPD_LEVEL_INFO;
1576                 break;
1577         case EAPOL_LOGGER_DEBUG:
1578         default:
1579                 hlevel = HOSTAPD_LEVEL_DEBUG;
1580                 break;
1581         }
1582
1583         hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE8021X, hlevel, "%s",
1584                        txt);
1585 }
1586
1587
1588 static void ieee802_1x_set_port_authorized(void *ctx, void *sta_ctx,
1589                                            int authorized)
1590 {
1591         struct hostapd_data *hapd = ctx;
1592         struct sta_info *sta = sta_ctx;
1593         ieee802_1x_set_sta_authorized(hapd, sta, authorized);
1594 }
1595
1596
1597 static void _ieee802_1x_abort_auth(void *ctx, void *sta_ctx)
1598 {
1599         struct hostapd_data *hapd = ctx;
1600         struct sta_info *sta = sta_ctx;
1601         ieee802_1x_abort_auth(hapd, sta);
1602 }
1603
1604
1605 static void _ieee802_1x_tx_key(void *ctx, void *sta_ctx)
1606 {
1607         struct hostapd_data *hapd = ctx;
1608         struct sta_info *sta = sta_ctx;
1609         ieee802_1x_tx_key(hapd, sta);
1610 }
1611
1612
1613 int ieee802_1x_init(struct hostapd_data *hapd)
1614 {
1615         int i;
1616         struct eapol_auth_config conf;
1617         struct eapol_auth_cb cb;
1618
1619         os_memset(&conf, 0, sizeof(conf));
1620         conf.hapd = hapd;
1621         conf.eap_reauth_period = hapd->conf->eap_reauth_period;
1622         conf.wpa = hapd->conf->wpa;
1623         conf.individual_wep_key_len = hapd->conf->individual_wep_key_len;
1624         conf.eap_server = hapd->conf->eap_server;
1625         conf.ssl_ctx = hapd->ssl_ctx;
1626         conf.eap_sim_db_priv = hapd->eap_sim_db_priv;
1627         conf.eap_req_id_text = hapd->conf->eap_req_id_text;
1628         conf.eap_req_id_text_len = hapd->conf->eap_req_id_text_len;
1629         conf.pac_opaque_encr_key = hapd->conf->pac_opaque_encr_key;
1630         conf.eap_fast_a_id = hapd->conf->eap_fast_a_id;
1631         conf.eap_fast_a_id_len = hapd->conf->eap_fast_a_id_len;
1632         conf.eap_fast_a_id_info = hapd->conf->eap_fast_a_id_info;
1633         conf.eap_fast_prov = hapd->conf->eap_fast_prov;
1634         conf.pac_key_lifetime = hapd->conf->pac_key_lifetime;
1635         conf.pac_key_refresh_time = hapd->conf->pac_key_refresh_time;
1636         conf.eap_sim_aka_result_ind = hapd->conf->eap_sim_aka_result_ind;
1637         conf.tnc = hapd->conf->tnc;
1638         conf.wps = hapd->wps;
1639
1640         os_memset(&cb, 0, sizeof(cb));
1641         cb.eapol_send = ieee802_1x_eapol_send;
1642         cb.aaa_send = ieee802_1x_aaa_send;
1643         cb.finished = _ieee802_1x_finished;
1644         cb.get_eap_user = ieee802_1x_get_eap_user;
1645         cb.sta_entry_alive = ieee802_1x_sta_entry_alive;
1646         cb.logger = ieee802_1x_logger;
1647         cb.set_port_authorized = ieee802_1x_set_port_authorized;
1648         cb.abort_auth = _ieee802_1x_abort_auth;
1649         cb.tx_key = _ieee802_1x_tx_key;
1650
1651         hapd->eapol_auth = eapol_auth_init(&conf, &cb);
1652         if (hapd->eapol_auth == NULL)
1653                 return -1;
1654
1655         if ((hapd->conf->ieee802_1x || hapd->conf->wpa) &&
1656             hostapd_set_ieee8021x(hapd->conf->iface, hapd, 1))
1657                 return -1;
1658
1659         if (radius_client_register(hapd->radius, RADIUS_AUTH,
1660                                    ieee802_1x_receive_auth, hapd))
1661                 return -1;
1662
1663         if (hapd->conf->default_wep_key_len) {
1664                 hostapd_set_privacy(hapd, 1);
1665
1666                 for (i = 0; i < 4; i++)
1667                         hostapd_set_encryption(hapd->conf->iface, hapd,
1668                                                "none", NULL, i, NULL, 0, 0);
1669
1670                 ieee802_1x_rekey(hapd, NULL);
1671
1672                 if (hapd->default_wep_key == NULL)
1673                         return -1;
1674         }
1675
1676         return 0;
1677 }
1678
1679
1680 void ieee802_1x_deinit(struct hostapd_data *hapd)
1681 {
1682         eloop_cancel_timeout(ieee802_1x_rekey, hapd, NULL);
1683
1684         if (hapd->driver != NULL &&
1685             (hapd->conf->ieee802_1x || hapd->conf->wpa))
1686                 hostapd_set_ieee8021x(hapd->conf->iface, hapd, 0);
1687
1688         eapol_auth_deinit(hapd->eapol_auth);
1689         hapd->eapol_auth = NULL;
1690 }
1691
1692
1693 int ieee802_1x_reconfig(struct hostapd_data *hapd,
1694                         struct hostapd_config *oldconf,
1695                         struct hostapd_bss_config *oldbss)
1696 {
1697         ieee802_1x_deinit(hapd);
1698         return ieee802_1x_init(hapd);
1699 }
1700
1701
1702 int ieee802_1x_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
1703                          u8 *buf, size_t len, int ack)
1704 {
1705         struct ieee80211_hdr *hdr;
1706         struct ieee802_1x_hdr *xhdr;
1707         struct ieee802_1x_eapol_key *key;
1708         u8 *pos;
1709         const unsigned char rfc1042_hdr[ETH_ALEN] =
1710                 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
1711
1712         if (sta == NULL)
1713                 return -1;
1714         if (len < sizeof(*hdr) + sizeof(rfc1042_hdr) + 2 + sizeof(*xhdr))
1715                 return 0;
1716
1717         hdr = (struct ieee80211_hdr *) buf;
1718         pos = (u8 *) (hdr + 1);
1719         if (os_memcmp(pos, rfc1042_hdr, sizeof(rfc1042_hdr)) != 0)
1720                 return 0;
1721         pos += sizeof(rfc1042_hdr);
1722         if (WPA_GET_BE16(pos) != ETH_P_PAE)
1723                 return 0;
1724         pos += 2;
1725
1726         xhdr = (struct ieee802_1x_hdr *) pos;
1727         pos += sizeof(*xhdr);
1728
1729         wpa_printf(MSG_DEBUG, "IEEE 802.1X: " MACSTR " TX status - version=%d "
1730                    "type=%d length=%d - ack=%d",
1731                    MAC2STR(sta->addr), xhdr->version, xhdr->type,
1732                    be_to_host16(xhdr->length), ack);
1733
1734         /* EAPOL EAP-Packet packets are eventually re-sent by either Supplicant
1735          * or Authenticator state machines, but EAPOL-Key packets are not
1736          * retransmitted in case of failure. Try to re-sent failed EAPOL-Key
1737          * packets couple of times because otherwise STA keys become
1738          * unsynchronized with AP. */
1739         if (xhdr->type == IEEE802_1X_TYPE_EAPOL_KEY && !ack &&
1740             pos + sizeof(*key) <= buf + len) {
1741                 key = (struct ieee802_1x_eapol_key *) pos;
1742                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1743                                HOSTAPD_LEVEL_DEBUG, "did not Ack EAPOL-Key "
1744                                "frame (%scast index=%d)",
1745                                key->key_index & BIT(7) ? "uni" : "broad",
1746                                key->key_index & ~BIT(7));
1747                 /* TODO: re-send EAPOL-Key couple of times (with short delay
1748                  * between them?). If all attempt fail, report error and
1749                  * deauthenticate STA so that it will get new keys when
1750                  * authenticating again (e.g., after returning in range).
1751                  * Separate limit/transmit state needed both for unicast and
1752                  * broadcast keys(?) */
1753         }
1754         /* TODO: could move unicast key configuration from ieee802_1x_tx_key()
1755          * to here and change the key only if the EAPOL-Key packet was Acked.
1756          */
1757
1758         return 1;
1759 }
1760
1761
1762 u8 * ieee802_1x_get_identity(struct eapol_state_machine *sm, size_t *len)
1763 {
1764         if (sm == NULL || sm->identity == NULL)
1765                 return NULL;
1766
1767         *len = sm->identity_len;
1768         return sm->identity;
1769 }
1770
1771
1772 u8 * ieee802_1x_get_radius_class(struct eapol_state_machine *sm, size_t *len,
1773                                  int idx)
1774 {
1775         if (sm == NULL || sm->radius_class.attr == NULL ||
1776             idx >= (int) sm->radius_class.count)
1777                 return NULL;
1778
1779         *len = sm->radius_class.attr[idx].len;
1780         return sm->radius_class.attr[idx].data;
1781 }
1782
1783
1784 const u8 * ieee802_1x_get_key(struct eapol_state_machine *sm, size_t *len)
1785 {
1786         if (sm == NULL)
1787                 return NULL;
1788
1789         *len = sm->eap_if->eapKeyDataLen;
1790         return sm->eap_if->eapKeyData;
1791 }
1792
1793
1794 void ieee802_1x_notify_port_enabled(struct eapol_state_machine *sm,
1795                                     int enabled)
1796 {
1797         if (sm == NULL)
1798                 return;
1799         sm->eap_if->portEnabled = enabled ? TRUE : FALSE;
1800         eapol_auth_step(sm);
1801 }
1802
1803
1804 void ieee802_1x_notify_port_valid(struct eapol_state_machine *sm,
1805                                   int valid)
1806 {
1807         if (sm == NULL)
1808                 return;
1809         sm->portValid = valid ? TRUE : FALSE;
1810         eapol_auth_step(sm);
1811 }
1812
1813
1814 void ieee802_1x_notify_pre_auth(struct eapol_state_machine *sm, int pre_auth)
1815 {
1816         if (sm == NULL)
1817                 return;
1818         if (pre_auth)
1819                 sm->flags |= EAPOL_SM_PREAUTH;
1820         else
1821                 sm->flags &= ~EAPOL_SM_PREAUTH;
1822 }
1823
1824
1825 static const char * bool_txt(Boolean bool)
1826 {
1827         return bool ? "TRUE" : "FALSE";
1828 }
1829
1830
1831 int ieee802_1x_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
1832 {
1833         /* TODO */
1834         return 0;
1835 }
1836
1837
1838 int ieee802_1x_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
1839                            char *buf, size_t buflen)
1840 {
1841         int len = 0, ret;
1842         struct eapol_state_machine *sm = sta->eapol_sm;
1843
1844         if (sm == NULL)
1845                 return 0;
1846
1847         ret = os_snprintf(buf + len, buflen - len,
1848                           "dot1xPaePortNumber=%d\n"
1849                           "dot1xPaePortProtocolVersion=%d\n"
1850                           "dot1xPaePortCapabilities=1\n"
1851                           "dot1xPaePortInitialize=%d\n"
1852                           "dot1xPaePortReauthenticate=FALSE\n",
1853                           sta->aid,
1854                           EAPOL_VERSION,
1855                           sm->initialize);
1856         if (ret < 0 || (size_t) ret >= buflen - len)
1857                 return len;
1858         len += ret;
1859
1860         /* dot1xAuthConfigTable */
1861         ret = os_snprintf(buf + len, buflen - len,
1862                           "dot1xAuthPaeState=%d\n"
1863                           "dot1xAuthBackendAuthState=%d\n"
1864                           "dot1xAuthAdminControlledDirections=%d\n"
1865                           "dot1xAuthOperControlledDirections=%d\n"
1866                           "dot1xAuthAuthControlledPortStatus=%d\n"
1867                           "dot1xAuthAuthControlledPortControl=%d\n"
1868                           "dot1xAuthQuietPeriod=%u\n"
1869                           "dot1xAuthServerTimeout=%u\n"
1870                           "dot1xAuthReAuthPeriod=%u\n"
1871                           "dot1xAuthReAuthEnabled=%s\n"
1872                           "dot1xAuthKeyTxEnabled=%s\n",
1873                           sm->auth_pae_state + 1,
1874                           sm->be_auth_state + 1,
1875                           sm->adminControlledDirections,
1876                           sm->operControlledDirections,
1877                           sm->authPortStatus,
1878                           sm->portControl,
1879                           sm->quietPeriod,
1880                           sm->serverTimeout,
1881                           sm->reAuthPeriod,
1882                           bool_txt(sm->reAuthEnabled),
1883                           bool_txt(sm->keyTxEnabled));
1884         if (ret < 0 || (size_t) ret >= buflen - len)
1885                 return len;
1886         len += ret;
1887
1888         /* dot1xAuthStatsTable */
1889         ret = os_snprintf(buf + len, buflen - len,
1890                           "dot1xAuthEapolFramesRx=%u\n"
1891                           "dot1xAuthEapolFramesTx=%u\n"
1892                           "dot1xAuthEapolStartFramesRx=%u\n"
1893                           "dot1xAuthEapolLogoffFramesRx=%u\n"
1894                           "dot1xAuthEapolRespIdFramesRx=%u\n"
1895                           "dot1xAuthEapolRespFramesRx=%u\n"
1896                           "dot1xAuthEapolReqIdFramesTx=%u\n"
1897                           "dot1xAuthEapolReqFramesTx=%u\n"
1898                           "dot1xAuthInvalidEapolFramesRx=%u\n"
1899                           "dot1xAuthEapLengthErrorFramesRx=%u\n"
1900                           "dot1xAuthLastEapolFrameVersion=%u\n"
1901                           "dot1xAuthLastEapolFrameSource=" MACSTR "\n",
1902                           sm->dot1xAuthEapolFramesRx,
1903                           sm->dot1xAuthEapolFramesTx,
1904                           sm->dot1xAuthEapolStartFramesRx,
1905                           sm->dot1xAuthEapolLogoffFramesRx,
1906                           sm->dot1xAuthEapolRespIdFramesRx,
1907                           sm->dot1xAuthEapolRespFramesRx,
1908                           sm->dot1xAuthEapolReqIdFramesTx,
1909                           sm->dot1xAuthEapolReqFramesTx,
1910                           sm->dot1xAuthInvalidEapolFramesRx,
1911                           sm->dot1xAuthEapLengthErrorFramesRx,
1912                           sm->dot1xAuthLastEapolFrameVersion,
1913                           MAC2STR(sm->addr));
1914         if (ret < 0 || (size_t) ret >= buflen - len)
1915                 return len;
1916         len += ret;
1917
1918         /* dot1xAuthDiagTable */
1919         ret = os_snprintf(buf + len, buflen - len,
1920                           "dot1xAuthEntersConnecting=%u\n"
1921                           "dot1xAuthEapLogoffsWhileConnecting=%u\n"
1922                           "dot1xAuthEntersAuthenticating=%u\n"
1923                           "dot1xAuthAuthSuccessesWhileAuthenticating=%u\n"
1924                           "dot1xAuthAuthTimeoutsWhileAuthenticating=%u\n"
1925                           "dot1xAuthAuthFailWhileAuthenticating=%u\n"
1926                           "dot1xAuthAuthEapStartsWhileAuthenticating=%u\n"
1927                           "dot1xAuthAuthEapLogoffWhileAuthenticating=%u\n"
1928                           "dot1xAuthAuthReauthsWhileAuthenticated=%u\n"
1929                           "dot1xAuthAuthEapStartsWhileAuthenticated=%u\n"
1930                           "dot1xAuthAuthEapLogoffWhileAuthenticated=%u\n"
1931                           "dot1xAuthBackendResponses=%u\n"
1932                           "dot1xAuthBackendAccessChallenges=%u\n"
1933                           "dot1xAuthBackendOtherRequestsToSupplicant=%u\n"
1934                           "dot1xAuthBackendAuthSuccesses=%u\n"
1935                           "dot1xAuthBackendAuthFails=%u\n",
1936                           sm->authEntersConnecting,
1937                           sm->authEapLogoffsWhileConnecting,
1938                           sm->authEntersAuthenticating,
1939                           sm->authAuthSuccessesWhileAuthenticating,
1940                           sm->authAuthTimeoutsWhileAuthenticating,
1941                           sm->authAuthFailWhileAuthenticating,
1942                           sm->authAuthEapStartsWhileAuthenticating,
1943                           sm->authAuthEapLogoffWhileAuthenticating,
1944                           sm->authAuthReauthsWhileAuthenticated,
1945                           sm->authAuthEapStartsWhileAuthenticated,
1946                           sm->authAuthEapLogoffWhileAuthenticated,
1947                           sm->backendResponses,
1948                           sm->backendAccessChallenges,
1949                           sm->backendOtherRequestsToSupplicant,
1950                           sm->backendAuthSuccesses,
1951                           sm->backendAuthFails);
1952         if (ret < 0 || (size_t) ret >= buflen - len)
1953                 return len;
1954         len += ret;
1955
1956         /* dot1xAuthSessionStatsTable */
1957         ret = os_snprintf(buf + len, buflen - len,
1958                           /* TODO: dot1xAuthSessionOctetsRx */
1959                           /* TODO: dot1xAuthSessionOctetsTx */
1960                           /* TODO: dot1xAuthSessionFramesRx */
1961                           /* TODO: dot1xAuthSessionFramesTx */
1962                           "dot1xAuthSessionId=%08X-%08X\n"
1963                           "dot1xAuthSessionAuthenticMethod=%d\n"
1964                           "dot1xAuthSessionTime=%u\n"
1965                           "dot1xAuthSessionTerminateCause=999\n"
1966                           "dot1xAuthSessionUserName=%s\n",
1967                           sta->acct_session_id_hi, sta->acct_session_id_lo,
1968                           (wpa_key_mgmt_wpa_ieee8021x(
1969                                    wpa_auth_sta_key_mgmt(sta->wpa_sm))) ?
1970                           1 : 2,
1971                           (unsigned int) (time(NULL) -
1972                                           sta->acct_session_start),
1973                           sm->identity);
1974         if (ret < 0 || (size_t) ret >= buflen - len)
1975                 return len;
1976         len += ret;
1977
1978         return len;
1979 }
1980
1981
1982 static void ieee802_1x_finished(struct hostapd_data *hapd,
1983                                 struct sta_info *sta, int success)
1984 {
1985         const u8 *key;
1986         size_t len;
1987         /* TODO: get PMKLifetime from WPA parameters */
1988         static const int dot11RSNAConfigPMKLifetime = 43200;
1989
1990         key = ieee802_1x_get_key(sta->eapol_sm, &len);
1991         if (success && key && len >= PMK_LEN &&
1992             wpa_auth_pmksa_add(sta->wpa_sm, key, dot11RSNAConfigPMKLifetime,
1993                                sta->eapol_sm) == 0) {
1994                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
1995                                HOSTAPD_LEVEL_DEBUG,
1996                                "Added PMKSA cache entry (IEEE 802.1X)");
1997         }
1998 }