git.maemo.org Git - wpasupplicant/blob - 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_i.h"
  31 #include "hw_features.h"
  32 #include "eap_server/eap.h"
  33 #include "ieee802_11_defs.h"
  34
  35
  36 static void ieee802_1x_finished(struct hostapd_data *hapd,
  37                                 struct sta_info *sta, int success);
  38
  39
  40 static void ieee802_1x_send(struct hostapd_data *hapd, struct sta_info *sta,
  41                             u8 type, const u8 *data, size_t datalen)
  42 {
  43         u8 *buf;
  44         struct ieee802_1x_hdr *xhdr;
  45         size_t len;
  46         int encrypt = 0;
  47
  48         len = sizeof(*xhdr) + datalen;
  49         buf = os_zalloc(len);
  50         if (buf == NULL) {
  51                 wpa_printf(MSG_ERROR, "malloc() failed for "
  52                            "ieee802_1x_send(len=%lu)",
  53                            (unsigned long) len);
  54                 return;
  55         }
  56
  57         xhdr = (struct ieee802_1x_hdr *) buf;
  58         xhdr->version = hapd->conf->eapol_version;
  59         xhdr->type = type;
  60         xhdr->length = host_to_be16(datalen);
  61
  62         if (datalen > 0 && data != NULL)
  63                 os_memcpy(xhdr + 1, data, datalen);
  64
  65         if (wpa_auth_pairwise_set(sta->wpa_sm))
  66                 encrypt = 1;
  67         if (sta->flags & WLAN_STA_PREAUTH) {
  68                 rsn_preauth_send(hapd, sta, buf, len);
  69         } else {
  70                 hostapd_send_eapol(hapd, sta->addr, buf, len, encrypt);
  71         }
  72
  73         os_free(buf);
  74 }
  75
  76
  77 void ieee802_1x_set_sta_authorized(struct hostapd_data *hapd,
  78                                    struct sta_info *sta, int authorized)
  79 {
  80         int res;
  81
  82         if (sta->flags & WLAN_STA_PREAUTH)
  83                 return;
  84
  85         if (authorized) {
  86                 sta->flags |= WLAN_STA_AUTHORIZED;
  87                 res = hostapd_sta_set_flags(hapd, sta->addr, sta->flags,
  88                                             WLAN_STA_AUTHORIZED, ~0);
  89                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
  90                                HOSTAPD_LEVEL_DEBUG, "authorizing port");
  91         } else {
  92                 sta->flags &= ~WLAN_STA_AUTHORIZED;
  93                 res = hostapd_sta_set_flags(hapd, sta->addr, sta->flags,
  94                                             0, ~WLAN_STA_AUTHORIZED);
  95                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
  96                                HOSTAPD_LEVEL_DEBUG, "unauthorizing port");
  97         }
  98
  99         if (res && errno != ENOENT) {
 100                 printf("Could not set station " MACSTR " flags for kernel "
 101                        "driver (errno=%d).\n", MAC2STR(sta->addr), errno);
 102         }
 103
 104         if (authorized)
 105                 accounting_sta_start(hapd, sta);
 106 }
 107
 108
 109 static void ieee802_1x_tx_key_one(struct hostapd_data *hapd,
 110                                   struct sta_info *sta,
 111                                   int idx, int broadcast,
 112                                   u8 *key_data, size_t key_len)
 113 {
 114         u8 *buf, *ekey;
 115         struct ieee802_1x_hdr *hdr;
 116         struct ieee802_1x_eapol_key *key;
 117         size_t len, ekey_len;
 118         struct eapol_state_machine *sm = sta->eapol_sm;
 119
 120         if (sm == NULL)
 121                 return;
 122
 123         len = sizeof(*key) + key_len;
 124         buf = os_zalloc(sizeof(*hdr) + len);
 125         if (buf == NULL)
 126                 return;
 127
 128         hdr = (struct ieee802_1x_hdr *) buf;
 129         key = (struct ieee802_1x_eapol_key *) (hdr + 1);
 130         key->type = EAPOL_KEY_TYPE_RC4;
 131         key->key_length = htons(key_len);
 132         wpa_get_ntp_timestamp(key->replay_counter);
 133
 134         if (os_get_random(key->key_iv, sizeof(key->key_iv))) {
 135                 wpa_printf(MSG_ERROR, "Could not get random numbers");
 136                 os_free(buf);
 137                 return;
 138         }
 139
 140         key->key_index = idx | (broadcast ? 0 : BIT(7));
 141         if (hapd->conf->eapol_key_index_workaround) {
 142                 /* According to some information, WinXP Supplicant seems to
 143                  * interpret bit7 as an indication whether the key is to be
 144                  * activated, so make it possible to enable workaround that
 145                  * sets this bit for all keys. */
 146                 key->key_index |= BIT(7);
 147         }
 148
 149         /* Key is encrypted using "Key-IV + MSK[0..31]" as the RC4-key and
 150          * MSK[32..63] is used to sign the message. */
 151         if (sm->eap_if->eapKeyData == NULL || sm->eap_if->eapKeyDataLen < 64) {
 152                 wpa_printf(MSG_ERROR, "No eapKeyData available for encrypting "
 153                            "and signing EAPOL-Key");
 154                 os_free(buf);
 155                 return;
 156         }
 157         os_memcpy((u8 *) (key + 1), key_data, key_len);
 158         ekey_len = sizeof(key->key_iv) + 32;
 159         ekey = os_malloc(ekey_len);
 160         if (ekey == NULL) {
 161                 wpa_printf(MSG_ERROR, "Could not encrypt key");
 162                 os_free(buf);
 163                 return;
 164         }
 165         os_memcpy(ekey, key->key_iv, sizeof(key->key_iv));
 166         os_memcpy(ekey + sizeof(key->key_iv), sm->eap_if->eapKeyData, 32);
 167         rc4((u8 *) (key + 1), key_len, ekey, ekey_len);
 168         os_free(ekey);
 169
 170         /* This header is needed here for HMAC-MD5, but it will be regenerated
 171          * in ieee802_1x_send() */
 172         hdr->version = hapd->conf->eapol_version;
 173         hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
 174         hdr->length = host_to_be16(len);
 175         hmac_md5(sm->eap_if->eapKeyData + 32, 32, buf, sizeof(*hdr) + len,
 176                  key->key_signature);
 177
 178         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key to " MACSTR
 179                    " (%s index=%d)", MAC2STR(sm->addr),
 180                    broadcast ? "broadcast" : "unicast", idx);
 181         ieee802_1x_send(hapd, sta, IEEE802_1X_TYPE_EAPOL_KEY, (u8 *) key, len);
 182         if (sta->eapol_sm)
 183                 sta->eapol_sm->dot1xAuthEapolFramesTx++;
 184         os_free(buf);
 185 }
 186
 187
 188 static struct hostapd_wep_keys *
 189 ieee802_1x_group_alloc(struct hostapd_data *hapd, const char *ifname)
 190 {
 191         struct hostapd_wep_keys *key;
 192
 193         key = os_zalloc(sizeof(*key));
 194         if (key == NULL)
 195                 return NULL;
 196
 197         key->default_len = hapd->conf->default_wep_key_len;
 198
 199         if (key->idx >= hapd->conf->broadcast_key_idx_max ||
 200             key->idx < hapd->conf->broadcast_key_idx_min)
 201                 key->idx = hapd->conf->broadcast_key_idx_min;
 202         else
 203                 key->idx++;
 204
 205         if (!key->key[key->idx])
 206                 key->key[key->idx] = os_malloc(key->default_len);
 207         if (key->key[key->idx] == NULL ||
 208             os_get_random(key->key[key->idx], key->default_len)) {
 209                 printf("Could not generate random WEP key (dynamic VLAN).\n");
 210                 os_free(key->key[key->idx]);
 211                 key->key[key->idx] = NULL;
 212                 os_free(key);
 213                 return NULL;
 214         }
 215         key->len[key->idx] = key->default_len;
 216
 217         wpa_printf(MSG_DEBUG, "%s: Default WEP idx %d for dynamic VLAN\n",
 218                    ifname, key->idx);
 219         wpa_hexdump_key(MSG_DEBUG, "Default WEP key (dynamic VLAN)",
 220                         key->key[key->idx], key->len[key->idx]);
 221
 222         if (hostapd_set_encryption(ifname, hapd, "WEP", NULL, key->idx,
 223                                    key->key[key->idx], key->len[key->idx], 1))
 224                 printf("Could not set dynamic VLAN WEP encryption key.\n");
 225
 226         hostapd_set_ieee8021x(ifname, hapd, 1);
 227
 228         return key;
 229 }
 230
 231
 232 static struct hostapd_wep_keys *
 233 ieee802_1x_get_group(struct hostapd_data *hapd, struct hostapd_ssid *ssid,
 234                      size_t vlan_id)
 235 {
 236         const char *ifname;
 237
 238         if (vlan_id == 0)
 239                 return &ssid->wep;
 240
 241         if (vlan_id <= ssid->max_dyn_vlan_keys && ssid->dyn_vlan_keys &&
 242             ssid->dyn_vlan_keys[vlan_id])
 243                 return ssid->dyn_vlan_keys[vlan_id];
 244
 245         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Creating new group "
 246                    "state machine for VLAN ID %lu",
 247                    (unsigned long) vlan_id);
 248
 249         ifname = hostapd_get_vlan_id_ifname(hapd->conf->vlan, vlan_id);
 250         if (ifname == NULL) {
 251                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Unknown VLAN ID %lu - "
 252                            "cannot create group key state machine",
 253                            (unsigned long) vlan_id);
 254                 return NULL;
 255         }
 256
 257         if (ssid->dyn_vlan_keys == NULL) {
 258                 int size = (vlan_id + 1) * sizeof(ssid->dyn_vlan_keys[0]);
 259                 ssid->dyn_vlan_keys = os_zalloc(size);
 260                 if (ssid->dyn_vlan_keys == NULL)
 261                         return NULL;
 262                 ssid->max_dyn_vlan_keys = vlan_id;
 263         }
 264
 265         if (ssid->max_dyn_vlan_keys < vlan_id) {
 266                 struct hostapd_wep_keys **na;
 267                 int size = (vlan_id + 1) * sizeof(ssid->dyn_vlan_keys[0]);
 268                 na = os_realloc(ssid->dyn_vlan_keys, size);
 269                 if (na == NULL)
 270                         return NULL;
 271                 ssid->dyn_vlan_keys = na;
 272                 os_memset(&ssid->dyn_vlan_keys[ssid->max_dyn_vlan_keys + 1], 0,
 273                           (vlan_id - ssid->max_dyn_vlan_keys) *
 274                           sizeof(ssid->dyn_vlan_keys[0]));
 275                 ssid->max_dyn_vlan_keys = vlan_id;
 276         }
 277
 278         ssid->dyn_vlan_keys[vlan_id] = ieee802_1x_group_alloc(hapd, ifname);
 279
 280         return ssid->dyn_vlan_keys[vlan_id];
 281 }
 282
 283
 284 void ieee802_1x_tx_key(struct hostapd_data *hapd, struct sta_info *sta)
 285 {
 286         struct hostapd_wep_keys *key = NULL;
 287         struct eapol_state_machine *sm = sta->eapol_sm;
 288         int vlan_id;
 289
 290         if (sm == NULL || !sm->eap_if->eapKeyData)
 291                 return;
 292
 293         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key(s) to " MACSTR,
 294                    MAC2STR(sta->addr));
 295
 296         vlan_id = sta->vlan_id;
 297         if (vlan_id < 0 || vlan_id > MAX_VLAN_ID)
 298                 vlan_id = 0;
 299
 300         if (vlan_id) {
 301                 key = ieee802_1x_get_group(hapd, sta->ssid, vlan_id);
 302                 if (key && key->key[key->idx])
 303                         ieee802_1x_tx_key_one(hapd, sta, key->idx, 1,
 304                                               key->key[key->idx],
 305                                               key->len[key->idx]);
 306         } else if (hapd->default_wep_key) {
 307                 ieee802_1x_tx_key_one(hapd, sta, hapd->default_wep_key_idx, 1,
 308                                       hapd->default_wep_key,
 309                                       hapd->conf->default_wep_key_len);
 310         }
 311
 312         if (hapd->conf->individual_wep_key_len > 0) {
 313                 u8 *ikey;
 314                 ikey = os_malloc(hapd->conf->individual_wep_key_len);
 315                 if (ikey == NULL ||
 316                     os_get_random(ikey, hapd->conf->individual_wep_key_len)) {
 317                         wpa_printf(MSG_ERROR, "Could not generate random "
 318                                    "individual WEP key.");
 319                         os_free(ikey);
 320                         return;
 321                 }
 322
 323                 wpa_hexdump_key(MSG_DEBUG, "Individual WEP key",
 324                                 ikey, hapd->conf->individual_wep_key_len);
 325
 326                 ieee802_1x_tx_key_one(hapd, sta, 0, 0, ikey,
 327                                       hapd->conf->individual_wep_key_len);
 328
 329                 /* TODO: set encryption in TX callback, i.e., only after STA
 330                  * has ACKed EAPOL-Key frame */
 331                 if (hostapd_set_encryption(hapd->conf->iface, hapd, "WEP",
 332                                            sta->addr, 0, ikey,
 333                                            hapd->conf->individual_wep_key_len,
 334                                            1)) {
 335                         wpa_printf(MSG_ERROR, "Could not set individual WEP "
 336                                    "encryption.");
 337                 }
 338
 339                 os_free(ikey);
 340         }
 341 }
 342
 343
 344 const char *radius_mode_txt(struct hostapd_data *hapd)
 345 {
 346         if (hapd->iface->current_mode == NULL)
 347                 return "802.11";
 348
 349         switch (hapd->iface->current_mode->mode) {
 350         case HOSTAPD_MODE_IEEE80211A:
 351                 return "802.11a";
 352         case HOSTAPD_MODE_IEEE80211G:
 353                 return "802.11g";
 354         case HOSTAPD_MODE_IEEE80211B:
 355         default:
 356                 return "802.11b";
 357         }
 358 }
 359
 360
 361 int radius_sta_rate(struct hostapd_data *hapd, struct sta_info *sta)
 362 {
 363         int i;
 364         u8 rate = 0;
 365
 366         for (i = 0; i < sta->supported_rates_len; i++)
 367                 if ((sta->supported_rates[i] & 0x7f) > rate)
 368                         rate = sta->supported_rates[i] & 0x7f;
 369
 370         return rate;
 371 }
 372
 373
 374 #ifndef CONFIG_NO_RADIUS
 375 static void ieee802_1x_learn_identity(struct hostapd_data *hapd,
 376                                       struct eapol_state_machine *sm,
 377                                       const u8 *eap, size_t len)
 378 {
 379         const u8 *identity;
 380         size_t identity_len;
 381
 382         if (len <= sizeof(struct eap_hdr) ||
 383             eap[sizeof(struct eap_hdr)] != EAP_TYPE_IDENTITY)
 384                 return;
 385
 386         identity = eap_get_identity(sm->eap, &identity_len);
 387         if (identity == NULL)
 388                 return;
 389
 390         /* Save station identity for future RADIUS packets */
 391         os_free(sm->identity);
 392         sm->identity = os_malloc(identity_len + 1);
 393         if (sm->identity == NULL) {
 394                 sm->identity_len = 0;
 395                 return;
 396         }
 397
 398         os_memcpy(sm->identity, identity, identity_len);
 399         sm->identity_len = identity_len;
 400         sm->identity[identity_len] = '\0';
 401         hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
 402                        HOSTAPD_LEVEL_DEBUG, "STA identity '%s'", sm->identity);
 403         sm->dot1xAuthEapolRespIdFramesRx++;
 404 }
 405
 406
 407 static void ieee802_1x_encapsulate_radius(struct hostapd_data *hapd,
 408                                           struct sta_info *sta,
 409                                           const u8 *eap, size_t len)
 410 {
 411         struct radius_msg *msg;
 412         char buf[128];
 413         struct eapol_state_machine *sm = sta->eapol_sm;
 414
 415         if (sm == NULL)
 416                 return;
 417
 418         ieee802_1x_learn_identity(hapd, sm, eap, len);
 419
 420         wpa_printf(MSG_DEBUG, "Encapsulating EAP message into a RADIUS "
 421                    "packet");
 422
 423         sm->radius_identifier = radius_client_get_id(hapd->radius);
 424         msg = radius_msg_new(RADIUS_CODE_ACCESS_REQUEST,
 425                              sm->radius_identifier);
 426         if (msg == NULL) {
 427                 printf("Could not create net RADIUS packet\n");
 428                 return;
 429         }
 430
 431         radius_msg_make_authenticator(msg, (u8 *) sta, sizeof(*sta));
 432
 433         if (sm->identity &&
 434             !radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME,
 435                                  sm->identity, sm->identity_len)) {
 436                 printf("Could not add User-Name\n");
 437                 goto fail;
 438         }
 439
 440         if (hapd->conf->own_ip_addr.af == AF_INET &&
 441             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS,
 442                                  (u8 *) &hapd->conf->own_ip_addr.u.v4, 4)) {
 443                 printf("Could not add NAS-IP-Address\n");
 444                 goto fail;
 445         }
 446
 447 #ifdef CONFIG_IPV6
 448         if (hapd->conf->own_ip_addr.af == AF_INET6 &&
 449             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IPV6_ADDRESS,
 450                                  (u8 *) &hapd->conf->own_ip_addr.u.v6, 16)) {
 451                 printf("Could not add NAS-IPv6-Address\n");
 452                 goto fail;
 453         }
 454 #endif /* CONFIG_IPV6 */
 455
 456         if (hapd->conf->nas_identifier &&
 457             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IDENTIFIER,
 458                                  (u8 *) hapd->conf->nas_identifier,
 459                                  os_strlen(hapd->conf->nas_identifier))) {
 460                 printf("Could not add NAS-Identifier\n");
 461                 goto fail;
 462         }
 463
 464         if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT, sta->aid)) {
 465                 printf("Could not add NAS-Port\n");
 466                 goto fail;
 467         }
 468
 469         os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT ":%s",
 470                     MAC2STR(hapd->own_addr), hapd->conf->ssid.ssid);
 471         buf[sizeof(buf) - 1] = '\0';
 472         if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLED_STATION_ID,
 473                                  (u8 *) buf, os_strlen(buf))) {
 474                 printf("Could not add Called-Station-Id\n");
 475                 goto fail;
 476         }
 477
 478         os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
 479                     MAC2STR(sta->addr));
 480         buf[sizeof(buf) - 1] = '\0';
 481         if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID,
 482                                  (u8 *) buf, os_strlen(buf))) {
 483                 printf("Could not add Calling-Station-Id\n");
 484                 goto fail;
 485         }
 486
 487         /* TODO: should probably check MTU from driver config; 2304 is max for
 488          * IEEE 802.11, but use 1400 to avoid problems with too large packets
 489          */
 490         if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_FRAMED_MTU, 1400)) {
 491                 printf("Could not add Framed-MTU\n");
 492                 goto fail;
 493         }
 494
 495         if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT_TYPE,
 496                                        RADIUS_NAS_PORT_TYPE_IEEE_802_11)) {
 497                 printf("Could not add NAS-Port-Type\n");
 498                 goto fail;
 499         }
 500
 501         if (sta->flags & WLAN_STA_PREAUTH) {
 502                 os_strlcpy(buf, "IEEE 802.11i Pre-Authentication",
 503                            sizeof(buf));
 504         } else {
 505                 os_snprintf(buf, sizeof(buf), "CONNECT %d%sMbps %s",
 506                             radius_sta_rate(hapd, sta) / 2,
 507                             (radius_sta_rate(hapd, sta) & 1) ? ".5" : "",
 508                             radius_mode_txt(hapd));
 509                 buf[sizeof(buf) - 1] = '\0';
 510         }
 511         if (!radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO,
 512                                  (u8 *) buf, os_strlen(buf))) {
 513                 printf("Could not add Connect-Info\n");
 514                 goto fail;
 515         }
 516
 517         if (eap && !radius_msg_add_eap(msg, eap, len)) {
 518                 printf("Could not add EAP-Message\n");
 519                 goto fail;
 520         }
 521
 522         /* State attribute must be copied if and only if this packet is
 523          * Access-Request reply to the previous Access-Challenge */
 524         if (sm->last_recv_radius && sm->last_recv_radius->hdr->code ==
 525             RADIUS_CODE_ACCESS_CHALLENGE) {
 526                 int res = radius_msg_copy_attr(msg, sm->last_recv_radius,
 527                                                RADIUS_ATTR_STATE);
 528                 if (res < 0) {
 529                         printf("Could not copy State attribute from previous "
 530                                "Access-Challenge\n");
 531                         goto fail;
 532                 }
 533                 if (res > 0) {
 534                         wpa_printf(MSG_DEBUG, "Copied RADIUS State Attribute");
 535                 }
 536         }
 537
 538         radius_client_send(hapd->radius, msg, RADIUS_AUTH, sta->addr);
 539         return;
 540
 541  fail:
 542         radius_msg_free(msg);
 543         os_free(msg);
 544 }
 545 #endif /* CONFIG_NO_RADIUS */
 546
 547
 548 char *eap_type_text(u8 type)
 549 {
 550         switch (type) {
 551         case EAP_TYPE_IDENTITY: return "Identity";
 552         case EAP_TYPE_NOTIFICATION: return "Notification";
 553         case EAP_TYPE_NAK: return "Nak";
 554         case EAP_TYPE_MD5: return "MD5-Challenge";
 555         case EAP_TYPE_OTP: return "One-Time Password";
 556         case EAP_TYPE_GTC: return "Generic Token Card";
 557         case EAP_TYPE_TLS: return "TLS";
 558         case EAP_TYPE_TTLS: return "TTLS";
 559         case EAP_TYPE_PEAP: return "PEAP";
 560         case EAP_TYPE_SIM: return "SIM";
 561         case EAP_TYPE_FAST: return "FAST";
 562         case EAP_TYPE_SAKE: return "SAKE";
 563         case EAP_TYPE_PSK: return "PSK";
 564         case EAP_TYPE_PAX: return "PAX";
 565         default: return "Unknown";
 566         }
 567 }
 568
 569
 570 static void handle_eap_response(struct hostapd_data *hapd,
 571                                 struct sta_info *sta, struct eap_hdr *eap,
 572                                 size_t len)
 573 {
 574         u8 type, *data;
 575         struct eapol_state_machine *sm = sta->eapol_sm;
 576         if (sm == NULL)
 577                 return;
 578
 579         data = (u8 *) (eap + 1);
 580
 581         if (len < sizeof(*eap) + 1) {
 582                 printf("handle_eap_response: too short response data\n");
 583                 return;
 584         }
 585
 586         sm->eap_type_supp = type = data[0];
 587
 588         hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
 589                        HOSTAPD_LEVEL_DEBUG, "received EAP packet (code=%d "
 590                        "id=%d len=%d) from STA: EAP Response-%s (%d)",
 591                        eap->code, eap->identifier, be_to_host16(eap->length),
 592                        eap_type_text(type), type);
 593
 594         sm->dot1xAuthEapolRespFramesRx++;
 595
 596         wpabuf_free(sm->eap_if->eapRespData);
 597         sm->eap_if->eapRespData = wpabuf_alloc_copy(eap, len);
 598         sm->eapolEap = TRUE;
 599 }
 600
 601
 602 /* Process incoming EAP packet from Supplicant */
 603 static void handle_eap(struct hostapd_data *hapd, struct sta_info *sta,
 604                        u8 *buf, size_t len)
 605 {
 606         struct eap_hdr *eap;
 607         u16 eap_len;
 608
 609         if (len < sizeof(*eap)) {
 610                 printf("   too short EAP packet\n");
 611                 return;
 612         }
 613
 614         eap = (struct eap_hdr *) buf;
 615
 616         eap_len = be_to_host16(eap->length);
 617         wpa_printf(MSG_DEBUG, "EAP: code=%d identifier=%d length=%d",
 618                    eap->code, eap->identifier, eap_len);
 619         if (eap_len < sizeof(*eap)) {
 620                 wpa_printf(MSG_DEBUG, "   Invalid EAP length");
 621                 return;
 622         } else if (eap_len > len) {
 623                 wpa_printf(MSG_DEBUG, "   Too short frame to contain this EAP "
 624                            "packet");
 625                 return;
 626         } else if (eap_len < len) {
 627                 wpa_printf(MSG_DEBUG, "   Ignoring %lu extra bytes after EAP "
 628                            "packet", (unsigned long) len - eap_len);
 629         }
 630
 631         switch (eap->code) {
 632         case EAP_CODE_REQUEST:
 633                 wpa_printf(MSG_DEBUG, " (request)");
 634                 return;
 635         case EAP_CODE_RESPONSE:
 636                 wpa_printf(MSG_DEBUG, " (response)");
 637                 handle_eap_response(hapd, sta, eap, eap_len);
 638                 break;
 639         case EAP_CODE_SUCCESS:
 640                 wpa_printf(MSG_DEBUG, " (success)");
 641                 return;
 642         case EAP_CODE_FAILURE:
 643                 wpa_printf(MSG_DEBUG, " (failure)");
 644                 return;
 645         default:
 646                 wpa_printf(MSG_DEBUG, " (unknown code)");
 647                 return;
 648         }
 649 }
 650
 651
 652 /**
 653  * ieee802_1x_receive - Process the EAPOL frames from the Supplicant
 654  * @hapd: hostapd BSS data
 655  * @sa: Source address (sender of the EAPOL frame)
 656  * @buf: EAPOL frame
 657  * @len: Length of buf in octets
 658  *
 659  * This function is called for each incoming EAPOL frame from the interface
 660  */
 661 void ieee802_1x_receive(struct hostapd_data *hapd, const u8 *sa, const u8 *buf,
 662                         size_t len)
 663 {
 664         struct sta_info *sta;
 665         struct ieee802_1x_hdr *hdr;
 666         struct ieee802_1x_eapol_key *key;
 667         u16 datalen;
 668         struct rsn_pmksa_cache_entry *pmksa;
 669
 670         if (!hapd->conf->ieee802_1x && !hapd->conf->wpa &&
 671             !hapd->conf->wps_state)
 672                 return;
 673
 674         wpa_printf(MSG_DEBUG, "IEEE 802.1X: %lu bytes from " MACSTR,
 675                    (unsigned long) len, MAC2STR(sa));
 676         sta = ap_get_sta(hapd, sa);
 677         if (!sta || !(sta->flags & WLAN_STA_ASSOC)) {
 678                 wpa_printf(MSG_DEBUG, "IEEE 802.1X data frame from not "
 679                            "associated STA");
 680                 return;
 681         }
 682
 683         if (len < sizeof(*hdr)) {
 684                 printf("   too short IEEE 802.1X packet\n");
 685                 return;
 686         }
 687
 688         hdr = (struct ieee802_1x_hdr *) buf;
 689         datalen = be_to_host16(hdr->length);
 690         wpa_printf(MSG_DEBUG, "   IEEE 802.1X: version=%d type=%d length=%d",
 691                    hdr->version, hdr->type, datalen);
 692
 693         if (len - sizeof(*hdr) < datalen) {
 694                 printf("   frame too short for this IEEE 802.1X packet\n");
 695                 if (sta->eapol_sm)
 696                         sta->eapol_sm->dot1xAuthEapLengthErrorFramesRx++;
 697                 return;
 698         }
 699         if (len - sizeof(*hdr) > datalen) {
 700                 wpa_printf(MSG_DEBUG, "   ignoring %lu extra octets after "
 701                            "IEEE 802.1X packet",
 702                            (unsigned long) len - sizeof(*hdr) - datalen);
 703         }
 704
 705         if (sta->eapol_sm) {
 706                 sta->eapol_sm->dot1xAuthLastEapolFrameVersion = hdr->version;
 707                 sta->eapol_sm->dot1xAuthEapolFramesRx++;
 708         }
 709
 710         key = (struct ieee802_1x_eapol_key *) (hdr + 1);
 711         if (datalen >= sizeof(struct ieee802_1x_eapol_key) &&
 712             hdr->type == IEEE802_1X_TYPE_EAPOL_KEY &&
 713             (key->type == EAPOL_KEY_TYPE_WPA ||
 714              key->type == EAPOL_KEY_TYPE_RSN)) {
 715                 wpa_receive(hapd->wpa_auth, sta->wpa_sm, (u8 *) hdr,
 716                             sizeof(*hdr) + datalen);
 717                 return;
 718         }
 719
 720         if ((!hapd->conf->ieee802_1x &&
 721              !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) ||
 722             wpa_key_mgmt_wpa_psk(wpa_auth_sta_key_mgmt(sta->wpa_sm)))
 723                 return;
 724
 725         if (!sta->eapol_sm) {
 726                 sta->eapol_sm = eapol_auth_alloc(hapd->eapol_auth, sta->addr,
 727                                                  sta->flags & WLAN_STA_PREAUTH,
 728                                                  sta);
 729                 if (!sta->eapol_sm)
 730                         return;
 731
 732 #ifdef CONFIG_WPS
 733                 if (!hapd->conf->ieee802_1x &&
 734                     ((sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) ==
 735                      WLAN_STA_MAYBE_WPS)) {
 736                         /*
 737                          * Delay EAPOL frame transmission until a possible WPS
 738                          * STA initiates the handshake with EAPOL-Start.
 739                          */
 740                         sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
 741                 }
 742 #endif /* CONFIG_WPS */
 743         }
 744
 745         /* since we support version 1, we can ignore version field and proceed
 746          * as specified in version 1 standard [IEEE Std 802.1X-2001, 7.5.5] */
 747         /* TODO: actually, we are not version 1 anymore.. However, Version 2
 748          * does not change frame contents, so should be ok to process frames
 749          * more or less identically. Some changes might be needed for
 750          * verification of fields. */
 751
 752         switch (hdr->type) {
 753         case IEEE802_1X_TYPE_EAP_PACKET:
 754                 handle_eap(hapd, sta, (u8 *) (hdr + 1), datalen);
 755                 break;
 756
 757         case IEEE802_1X_TYPE_EAPOL_START:
 758                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 759                                HOSTAPD_LEVEL_DEBUG, "received EAPOL-Start "
 760                                "from STA");
 761                 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
 762                 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
 763                 if (pmksa) {
 764                         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
 765                                        HOSTAPD_LEVEL_DEBUG, "cached PMKSA "
 766                                        "available - ignore it since "
 767                                        "STA sent EAPOL-Start");
 768                         wpa_auth_sta_clear_pmksa(sta->wpa_sm, pmksa);
 769                 }
 770                 sta->eapol_sm->eapolStart = TRUE;
 771                 sta->eapol_sm->dot1xAuthEapolStartFramesRx++;
 772                 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
 773                 break;
 774
 775         case IEEE802_1X_TYPE_EAPOL_LOGOFF:
 776                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 777                                HOSTAPD_LEVEL_DEBUG, "received EAPOL-Logoff "
 778                                "from STA");
 779                 sta->acct_terminate_cause =
 780                         RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
 781                 accounting_sta_stop(hapd, sta);
 782                 sta->eapol_sm->eapolLogoff = TRUE;
 783                 sta->eapol_sm->dot1xAuthEapolLogoffFramesRx++;
 784                 break;
 785
 786         case IEEE802_1X_TYPE_EAPOL_KEY:
 787                 wpa_printf(MSG_DEBUG, "   EAPOL-Key");
 788                 if (!(sta->flags & WLAN_STA_AUTHORIZED)) {
 789                         wpa_printf(MSG_DEBUG, "   Dropped key data from "
 790                                    "unauthorized Supplicant");
 791                         break;
 792                 }
 793                 break;
 794
 795         case IEEE802_1X_TYPE_EAPOL_ENCAPSULATED_ASF_ALERT:
 796                 wpa_printf(MSG_DEBUG, "   EAPOL-Encapsulated-ASF-Alert");
 797                 /* TODO: implement support for this; show data */
 798                 break;
 799
 800         default:
 801                 wpa_printf(MSG_DEBUG, "   unknown IEEE 802.1X packet type");
 802                 sta->eapol_sm->dot1xAuthInvalidEapolFramesRx++;
 803                 break;
 804         }
 805
 806         eapol_auth_step(sta->eapol_sm);
 807 }
 808
 809
 810 /**
 811  * ieee802_1x_new_station - Start IEEE 802.1X authentication
 812  * @hapd: hostapd BSS data
 813  * @sta: The station
 814  *
 815  * This function is called to start IEEE 802.1X authentication when a new
 816  * station completes IEEE 802.11 association.
 817  */
 818 void ieee802_1x_new_station(struct hostapd_data *hapd, struct sta_info *sta)
 819 {
 820         struct rsn_pmksa_cache_entry *pmksa;
 821         int reassoc = 1;
 822         int force_1x = 0;
 823
 824 #ifdef CONFIG_WPS
 825         if (hapd->conf->wps_state &&
 826             (sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) {
 827                 /*
 828                  * Need to enable IEEE 802.1X/EAPOL state machines for possible
 829                  * WPS handshake even if IEEE 802.1X/EAPOL is not used for
 830                  * authentication in this BSS.
 831                  */
 832                 force_1x = 1;
 833         }
 834 #endif /* CONFIG_WPS */
 835
 836         if ((!force_1x && !hapd->conf->ieee802_1x) ||
 837             wpa_key_mgmt_wpa_psk(wpa_auth_sta_key_mgmt(sta->wpa_sm)))
 838                 return;
 839
 840         if (sta->eapol_sm == NULL) {
 841                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 842                                HOSTAPD_LEVEL_DEBUG, "start authentication");
 843                 sta->eapol_sm = eapol_auth_alloc(hapd->eapol_auth, sta->addr,
 844                                                  sta->flags & WLAN_STA_PREAUTH,
 845                                                  sta);
 846                 if (sta->eapol_sm == NULL) {
 847                         hostapd_logger(hapd, sta->addr,
 848                                        HOSTAPD_MODULE_IEEE8021X,
 849                                        HOSTAPD_LEVEL_INFO,
 850                                        "failed to allocate state machine");
 851                         return;
 852                 }
 853                 reassoc = 0;
 854         }
 855
 856 #ifdef CONFIG_WPS
 857         sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
 858         if (!hapd->conf->ieee802_1x && !(sta->flags & WLAN_STA_WPS)) {
 859                 /*
 860                  * Delay EAPOL frame transmission until a possible WPS
 861                  * initiates the handshake with EAPOL-Start.
 862                  */
 863                 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
 864         }
 865 #endif /* CONFIG_WPS */
 866
 867         sta->eapol_sm->eap_if->portEnabled = TRUE;
 868
 869         pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
 870         if (pmksa) {
 871                 int old_vlanid;
 872
 873                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 874                                HOSTAPD_LEVEL_DEBUG,
 875                                "PMK from PMKSA cache - skip IEEE 802.1X/EAP");
 876                 /* Setup EAPOL state machines to already authenticated state
 877                  * because of existing PMKSA information in the cache. */
 878                 sta->eapol_sm->keyRun = TRUE;
 879                 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
 880                 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
 881                 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
 882                 sta->eapol_sm->authSuccess = TRUE;
 883                 if (sta->eapol_sm->eap)
 884                         eap_sm_notify_cached(sta->eapol_sm->eap);
 885                 old_vlanid = sta->vlan_id;
 886                 pmksa_cache_to_eapol_data(pmksa, sta->eapol_sm);
 887                 if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
 888                         sta->vlan_id = 0;
 889                 ap_sta_bind_vlan(hapd, sta, old_vlanid);
 890         } else {
 891                 if (reassoc) {
 892                         /*
 893                          * Force EAPOL state machines to start
 894                          * re-authentication without having to wait for the
 895                          * Supplicant to send EAPOL-Start.
 896                          */
 897                         sta->eapol_sm->reAuthenticate = TRUE;
 898                 }
 899                 eapol_auth_step(sta->eapol_sm);
 900         }
 901 }
 902
 903
 904 void ieee802_1x_free_radius_class(struct radius_class_data *class)
 905 {
 906         size_t i;
 907         if (class == NULL)
 908                 return;
 909         for (i = 0; i < class->count; i++)
 910                 os_free(class->attr[i].data);
 911         os_free(class->attr);
 912         class->attr = NULL;
 913         class->count = 0;
 914 }
 915
 916
 917 int ieee802_1x_copy_radius_class(struct radius_class_data *dst,
 918                                  const struct radius_class_data *src)
 919 {
 920         size_t i;
 921
 922         if (src->attr == NULL)
 923                 return 0;
 924
 925         dst->attr = os_zalloc(src->count * sizeof(struct radius_attr_data));
 926         if (dst->attr == NULL)
 927                 return -1;
 928
 929         dst->count = 0;
 930
 931         for (i = 0; i < src->count; i++) {
 932                 dst->attr[i].data = os_malloc(src->attr[i].len);
 933                 if (dst->attr[i].data == NULL)
 934                         break;
 935                 dst->count++;
 936                 os_memcpy(dst->attr[i].data, src->attr[i].data,
 937                           src->attr[i].len);
 938                 dst->attr[i].len = src->attr[i].len;
 939         }
 940
 941         return 0;
 942 }
 943
 944
 945 void ieee802_1x_free_station(struct sta_info *sta)
 946 {
 947         struct eapol_state_machine *sm = sta->eapol_sm;
 948
 949         if (sm == NULL)
 950                 return;
 951
 952         sta->eapol_sm = NULL;
 953
 954 #ifndef CONFIG_NO_RADIUS
 955         if (sm->last_recv_radius) {
 956                 radius_msg_free(sm->last_recv_radius);
 957                 os_free(sm->last_recv_radius);
 958         }
 959 #endif /* CONFIG_NO_RADIUS */
 960
 961         os_free(sm->identity);
 962         ieee802_1x_free_radius_class(&sm->radius_class);
 963         eapol_auth_free(sm);
 964 }
 965
 966
 967 #ifndef CONFIG_NO_RADIUS
 968 static void ieee802_1x_decapsulate_radius(struct hostapd_data *hapd,
 969                                           struct sta_info *sta)
 970 {
 971         u8 *eap;
 972         size_t len;
 973         struct eap_hdr *hdr;
 974         int eap_type = -1;
 975         char buf[64];
 976         struct radius_msg *msg;
 977         struct eapol_state_machine *sm = sta->eapol_sm;
 978
 979         if (sm == NULL || sm->last_recv_radius == NULL) {
 980                 if (sm)
 981                         sm->eap_if->aaaEapNoReq = TRUE;
 982                 return;
 983         }
 984
 985         msg = sm->last_recv_radius;
 986
 987         eap = radius_msg_get_eap(msg, &len);
 988         if (eap == NULL) {
 989                 /* RFC 3579, Chap. 2.6.3:
 990                  * RADIUS server SHOULD NOT send Access-Reject/no EAP-Message
 991                  * attribute */
 992                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 993                                HOSTAPD_LEVEL_WARNING, "could not extract "
 994                                "EAP-Message from RADIUS message");
 995                 sm->eap_if->aaaEapNoReq = TRUE;
 996                 return;
 997         }
 998
 999         if (len < sizeof(*hdr)) {
1000                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1001                                HOSTAPD_LEVEL_WARNING, "too short EAP packet "
1002                                "received from authentication server");
1003                 os_free(eap);
1004                 sm->eap_if->aaaEapNoReq = TRUE;
1005                 return;
1006         }
1007
1008         if (len > sizeof(*hdr))
1009                 eap_type = eap[sizeof(*hdr)];
1010
1011         hdr = (struct eap_hdr *) eap;
1012         switch (hdr->code) {
1013         case EAP_CODE_REQUEST:
1014                 if (eap_type >= 0)
1015                         sm->eap_type_authsrv = eap_type;
1016                 os_snprintf(buf, sizeof(buf), "EAP-Request-%s (%d)",
1017                             eap_type >= 0 ? eap_type_text(eap_type) : "??",
1018                             eap_type);
1019                 break;
1020         case EAP_CODE_RESPONSE:
1021                 os_snprintf(buf, sizeof(buf), "EAP Response-%s (%d)",
1022                             eap_type >= 0 ? eap_type_text(eap_type) : "??",
1023                             eap_type);
1024                 break;
1025         case EAP_CODE_SUCCESS:
1026                 os_strlcpy(buf, "EAP Success", sizeof(buf));
1027                 break;
1028         case EAP_CODE_FAILURE:
1029                 os_strlcpy(buf, "EAP Failure", sizeof(buf));
1030                 break;
1031         default:
1032                 os_strlcpy(buf, "unknown EAP code", sizeof(buf));
1033                 break;
1034         }
1035         buf[sizeof(buf) - 1] = '\0';
1036         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1037                        HOSTAPD_LEVEL_DEBUG, "decapsulated EAP packet (code=%d "
1038                        "id=%d len=%d) from RADIUS server: %s",
1039                        hdr->code, hdr->identifier, be_to_host16(hdr->length),
1040                        buf);
1041         sm->eap_if->aaaEapReq = TRUE;
1042
1043         wpabuf_free(sm->eap_if->aaaEapReqData);
1044         sm->eap_if->aaaEapReqData = wpabuf_alloc_ext_data(eap, len);
1045 }
1046
1047
1048 static void ieee802_1x_get_keys(struct hostapd_data *hapd,
1049                                 struct sta_info *sta, struct radius_msg *msg,
1050                                 struct radius_msg *req,
1051                                 const u8 *shared_secret,
1052                                 size_t shared_secret_len)
1053 {
1054         struct radius_ms_mppe_keys *keys;
1055         struct eapol_state_machine *sm = sta->eapol_sm;
1056         if (sm == NULL)
1057                 return;
1058
1059         keys = radius_msg_get_ms_keys(msg, req, shared_secret,
1060                                       shared_secret_len);
1061
1062         if (keys && keys->send && keys->recv) {
1063                 size_t len = keys->send_len + keys->recv_len;
1064                 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Send-Key",
1065                                 keys->send, keys->send_len);
1066                 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Recv-Key",
1067                                 keys->recv, keys->recv_len);
1068
1069                 os_free(sm->eap_if->aaaEapKeyData);
1070                 sm->eap_if->aaaEapKeyData = os_malloc(len);
1071                 if (sm->eap_if->aaaEapKeyData) {
1072                         os_memcpy(sm->eap_if->aaaEapKeyData, keys->recv,
1073                                   keys->recv_len);
1074                         os_memcpy(sm->eap_if->aaaEapKeyData + keys->recv_len,
1075                                   keys->send, keys->send_len);
1076                         sm->eap_if->aaaEapKeyDataLen = len;
1077                         sm->eap_if->aaaEapKeyAvailable = TRUE;
1078                 }
1079         }
1080
1081         if (keys) {
1082                 os_free(keys->send);
1083                 os_free(keys->recv);
1084                 os_free(keys);
1085         }
1086 }
1087
1088
1089 static void ieee802_1x_store_radius_class(struct hostapd_data *hapd,
1090                                           struct sta_info *sta,
1091                                           struct radius_msg *msg)
1092 {
1093         u8 *class;
1094         size_t class_len;
1095         struct eapol_state_machine *sm = sta->eapol_sm;
1096         int count, i;
1097         struct radius_attr_data *nclass;
1098         size_t nclass_count;
1099
1100         if (!hapd->conf->radius->acct_server || hapd->radius == NULL ||
1101             sm == NULL)
1102                 return;
1103
1104         ieee802_1x_free_radius_class(&sm->radius_class);
1105         count = radius_msg_count_attr(msg, RADIUS_ATTR_CLASS, 1);
1106         if (count <= 0)
1107                 return;
1108
1109         nclass = os_zalloc(count * sizeof(struct radius_attr_data));
1110         if (nclass == NULL)
1111                 return;
1112
1113         nclass_count = 0;
1114
1115         class = NULL;
1116         for (i = 0; i < count; i++) {
1117                 do {
1118                         if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CLASS,
1119                                                     &class, &class_len,
1120                                                     class) < 0) {
1121                                 i = count;
1122                                 break;
1123                         }
1124                 } while (class_len < 1);
1125
1126                 nclass[nclass_count].data = os_malloc(class_len);
1127                 if (nclass[nclass_count].data == NULL)
1128                         break;
1129
1130                 os_memcpy(nclass[nclass_count].data, class, class_len);
1131                 nclass[nclass_count].len = class_len;
1132                 nclass_count++;
1133         }
1134
1135         sm->radius_class.attr = nclass;
1136         sm->radius_class.count = nclass_count;
1137         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Stored %lu RADIUS Class "
1138                    "attributes for " MACSTR,
1139                    (unsigned long) sm->radius_class.count,
1140                    MAC2STR(sta->addr));
1141 }
1142
1143
1144 /* Update sta->identity based on User-Name attribute in Access-Accept */
1145 static void ieee802_1x_update_sta_identity(struct hostapd_data *hapd,
1146                                            struct sta_info *sta,
1147                                            struct radius_msg *msg)
1148 {
1149         u8 *buf, *identity;
1150         size_t len;
1151         struct eapol_state_machine *sm = sta->eapol_sm;
1152
1153         if (sm == NULL)
1154                 return;
1155
1156         if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_USER_NAME, &buf, &len,
1157                                     NULL) < 0)
1158                 return;
1159
1160         identity = os_malloc(len + 1);
1161         if (identity == NULL)
1162                 return;
1163
1164         os_memcpy(identity, buf, len);
1165         identity[len] = '\0';
1166
1167         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1168                        HOSTAPD_LEVEL_DEBUG, "old identity '%s' updated with "
1169                        "User-Name from Access-Accept '%s'",
1170                        sm->identity ? (char *) sm->identity : "N/A",
1171                        (char *) identity);
1172
1173         os_free(sm->identity);
1174         sm->identity = identity;
1175         sm->identity_len = len;
1176 }
1177
1178
1179 struct sta_id_search {
1180         u8 identifier;
1181         struct eapol_state_machine *sm;
1182 };
1183
1184
1185 static int ieee802_1x_select_radius_identifier(struct hostapd_data *hapd,
1186                                                struct sta_info *sta,
1187                                                void *ctx)
1188 {
1189         struct sta_id_search *id_search = ctx;
1190         struct eapol_state_machine *sm = sta->eapol_sm;
1191
1192         if (sm && sm->radius_identifier >= 0 &&
1193             sm->radius_identifier == id_search->identifier) {
1194                 id_search->sm = sm;
1195                 return 1;
1196         }
1197         return 0;
1198 }
1199
1200
1201 static struct eapol_state_machine *
1202 ieee802_1x_search_radius_identifier(struct hostapd_data *hapd, u8 identifier)
1203 {
1204         struct sta_id_search id_search;
1205         id_search.identifier = identifier;
1206         id_search.sm = NULL;
1207         ap_for_each_sta(hapd, ieee802_1x_select_radius_identifier, &id_search);
1208         return id_search.sm;
1209 }
1210
1211
1212 /**
1213  * ieee802_1x_receive_auth - Process RADIUS frames from Authentication Server
1214  * @msg: RADIUS response message
1215  * @req: RADIUS request message
1216  * @shared_secret: RADIUS shared secret
1217  * @shared_secret_len: Length of shared_secret in octets
1218  * @data: Context data (struct hostapd_data *)
1219  * Returns: Processing status
1220  */
1221 static RadiusRxResult
1222 ieee802_1x_receive_auth(struct radius_msg *msg, struct radius_msg *req,
1223                         const u8 *shared_secret, size_t shared_secret_len,
1224                         void *data)
1225 {
1226         struct hostapd_data *hapd = data;
1227         struct sta_info *sta;
1228         u32 session_timeout = 0, termination_action, acct_interim_interval;
1229         int session_timeout_set, old_vlanid = 0;
1230         struct eapol_state_machine *sm;
1231         int override_eapReq = 0;
1232
1233         sm = ieee802_1x_search_radius_identifier(hapd, msg->hdr->identifier);
1234         if (sm == NULL) {
1235                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Could not find matching "
1236                            "station for this RADIUS message");
1237                 return RADIUS_RX_UNKNOWN;
1238         }
1239         sta = sm->sta;
1240
1241         /* RFC 2869, Ch. 5.13: valid Message-Authenticator attribute MUST be
1242          * present when packet contains an EAP-Message attribute */
1243         if (msg->hdr->code == RADIUS_CODE_ACCESS_REJECT &&
1244             radius_msg_get_attr(msg, RADIUS_ATTR_MESSAGE_AUTHENTICATOR, NULL,
1245                                 0) < 0 &&
1246             radius_msg_get_attr(msg, RADIUS_ATTR_EAP_MESSAGE, NULL, 0) < 0) {
1247                 wpa_printf(MSG_DEBUG, "Allowing RADIUS Access-Reject without "
1248                            "Message-Authenticator since it does not include "
1249                            "EAP-Message");
1250         } else if (radius_msg_verify(msg, shared_secret, shared_secret_len,
1251                                      req, 1)) {
1252                 printf("Incoming RADIUS packet did not have correct "
1253                        "Message-Authenticator - dropped\n");
1254                 return RADIUS_RX_INVALID_AUTHENTICATOR;
1255         }
1256
1257         if (msg->hdr->code != RADIUS_CODE_ACCESS_ACCEPT &&
1258             msg->hdr->code != RADIUS_CODE_ACCESS_REJECT &&
1259             msg->hdr->code != RADIUS_CODE_ACCESS_CHALLENGE) {
1260                 printf("Unknown RADIUS message code\n");
1261                 return RADIUS_RX_UNKNOWN;
1262         }
1263
1264         sm->radius_identifier = -1;
1265         wpa_printf(MSG_DEBUG, "RADIUS packet matching with station " MACSTR,
1266                    MAC2STR(sta->addr));
1267
1268         if (sm->last_recv_radius) {
1269                 radius_msg_free(sm->last_recv_radius);
1270                 os_free(sm->last_recv_radius);
1271         }
1272
1273         sm->last_recv_radius = msg;
1274
1275         session_timeout_set =
1276                 !radius_msg_get_attr_int32(msg, RADIUS_ATTR_SESSION_TIMEOUT,
1277                                            &session_timeout);
1278         if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_TERMINATION_ACTION,
1279                                       &termination_action))
1280                 termination_action = RADIUS_TERMINATION_ACTION_DEFAULT;
1281
1282         if (hapd->conf->radius->acct_interim_interval == 0 &&
1283             msg->hdr->code == RADIUS_CODE_ACCESS_ACCEPT &&
1284             radius_msg_get_attr_int32(msg, RADIUS_ATTR_ACCT_INTERIM_INTERVAL,
1285                                       &acct_interim_interval) == 0) {
1286                 if (acct_interim_interval < 60) {
1287                         hostapd_logger(hapd, sta->addr,
1288                                        HOSTAPD_MODULE_IEEE8021X,
1289                                        HOSTAPD_LEVEL_INFO,
1290                                        "ignored too small "
1291                                        "Acct-Interim-Interval %d",
1292                                        acct_interim_interval);
1293                 } else
1294                         sta->acct_interim_interval = acct_interim_interval;
1295         }
1296
1297
1298         switch (msg->hdr->code) {
1299         case RADIUS_CODE_ACCESS_ACCEPT:
1300                 if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
1301                         sta->vlan_id = 0;
1302                 else {
1303                         old_vlanid = sta->vlan_id;
1304                         sta->vlan_id = radius_msg_get_vlanid(msg);
1305                 }
1306                 if (sta->vlan_id > 0 &&
1307                     hostapd_get_vlan_id_ifname(hapd->conf->vlan,
1308                                                sta->vlan_id)) {
1309                         hostapd_logger(hapd, sta->addr,
1310                                        HOSTAPD_MODULE_RADIUS,
1311                                        HOSTAPD_LEVEL_INFO,
1312                                        "VLAN ID %d", sta->vlan_id);
1313                 } else if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_REQUIRED) {
1314                         sta->eapol_sm->authFail = TRUE;
1315                         hostapd_logger(hapd, sta->addr,
1316                                        HOSTAPD_MODULE_IEEE8021X,
1317                                        HOSTAPD_LEVEL_INFO, "authentication "
1318                                        "server did not include required VLAN "
1319                                        "ID in Access-Accept");
1320                         break;
1321                 }
1322
1323                 ap_sta_bind_vlan(hapd, sta, old_vlanid);
1324
1325                 /* RFC 3580, Ch. 3.17 */
1326                 if (session_timeout_set && termination_action ==
1327                     RADIUS_TERMINATION_ACTION_RADIUS_REQUEST) {
1328                         sm->reAuthPeriod = session_timeout;
1329                 } else if (session_timeout_set)
1330                         ap_sta_session_timeout(hapd, sta, session_timeout);
1331
1332                 sm->eap_if->aaaSuccess = TRUE;
1333                 override_eapReq = 1;
1334                 ieee802_1x_get_keys(hapd, sta, msg, req, shared_secret,
1335                                     shared_secret_len);
1336                 ieee802_1x_store_radius_class(hapd, sta, msg);
1337                 ieee802_1x_update_sta_identity(hapd, sta, msg);
1338                 if (sm->eap_if->eapKeyAvailable &&
1339                     wpa_auth_pmksa_add(sta->wpa_sm, sm->eapol_key_crypt,
1340                                        session_timeout_set ?
1341                                        (int) session_timeout : -1, sm) == 0) {
1342                         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
1343                                        HOSTAPD_LEVEL_DEBUG,
1344                                        "Added PMKSA cache entry");
1345                 }
1346                 break;
1347         case RADIUS_CODE_ACCESS_REJECT:
1348                 sm->eap_if->aaaFail = TRUE;
1349                 override_eapReq = 1;
1350                 break;
1351         case RADIUS_CODE_ACCESS_CHALLENGE:
1352                 sm->eap_if->aaaEapReq = TRUE;
1353                 if (session_timeout_set) {
1354                         /* RFC 2869, Ch. 2.3.2; RFC 3580, Ch. 3.17 */
1355                         sm->eap_if->aaaMethodTimeout = session_timeout;
1356                         hostapd_logger(hapd, sm->addr,
1357                                        HOSTAPD_MODULE_IEEE8021X,
1358                                        HOSTAPD_LEVEL_DEBUG,
1359                                        "using EAP timeout of %d seconds (from "
1360                                        "RADIUS)",
1361                                        sm->eap_if->aaaMethodTimeout);
1362                 } else {
1363                         /*
1364                          * Use dynamic retransmission behavior per EAP
1365                          * specification.
1366                          */
1367                         sm->eap_if->aaaMethodTimeout = 0;
1368                 }
1369                 break;
1370         }
1371
1372         ieee802_1x_decapsulate_radius(hapd, sta);
1373         if (override_eapReq)
1374                 sm->eap_if->aaaEapReq = FALSE;
1375
1376         eapol_auth_step(sm);
1377
1378         return RADIUS_RX_QUEUED;
1379 }
1380 #endif /* CONFIG_NO_RADIUS */
1381
1382
1383 void ieee802_1x_abort_auth(struct hostapd_data *hapd, struct sta_info *sta)
1384 {
1385         struct eapol_state_machine *sm = sta->eapol_sm;
1386         if (sm == NULL)
1387                 return;
1388
1389         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1390                        HOSTAPD_LEVEL_DEBUG, "aborting authentication");
1391
1392 #ifndef CONFIG_NO_RADIUS
1393         if (sm->last_recv_radius) {
1394                 radius_msg_free(sm->last_recv_radius);
1395                 os_free(sm->last_recv_radius);
1396                 sm->last_recv_radius = NULL;
1397         }
1398 #endif /* CONFIG_NO_RADIUS */
1399
1400         if (sm->eap_if->eapTimeout) {
1401                 /*
1402                  * Disconnect the STA since it did not reply to the last EAP
1403                  * request and we cannot continue EAP processing (EAP-Failure
1404                  * could only be sent if the EAP peer actually replied).
1405                  */
1406                 sm->eap_if->portEnabled = FALSE;
1407                 hostapd_sta_deauth(hapd, sta->addr,
1408                                    WLAN_REASON_PREV_AUTH_NOT_VALID);
1409                 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC |
1410                                 WLAN_STA_AUTHORIZED);
1411                 eloop_cancel_timeout(ap_handle_timer, hapd, sta);
1412                 eloop_register_timeout(0, 0, ap_handle_timer, hapd, sta);
1413                 sta->timeout_next = STA_REMOVE;
1414         }
1415 }
1416
1417
1418 #ifdef HOSTAPD_DUMP_STATE
1419 static void fprint_char(FILE *f, char c)
1420 {
1421         if (c >= 32 && c < 127)
1422                 fprintf(f, "%c", c);
1423         else
1424                 fprintf(f, "<%02x>", c);
1425 }
1426
1427
1428 void ieee802_1x_dump_state(FILE *f, const char *prefix, struct sta_info *sta)
1429 {
1430         struct eapol_state_machine *sm = sta->eapol_sm;
1431         if (sm == NULL)
1432                 return;
1433
1434         fprintf(f, "%sIEEE 802.1X:\n", prefix);
1435
1436         if (sm->identity) {
1437                 size_t i;
1438                 fprintf(f, "%sidentity=", prefix);
1439                 for (i = 0; i < sm->identity_len; i++)
1440                         fprint_char(f, sm->identity[i]);
1441                 fprintf(f, "\n");
1442         }
1443
1444         fprintf(f, "%slast EAP type: Authentication Server: %d (%s) "
1445                 "Supplicant: %d (%s)\n", prefix,
1446                 sm->eap_type_authsrv, eap_type_text(sm->eap_type_authsrv),
1447                 sm->eap_type_supp, eap_type_text(sm->eap_type_supp));
1448
1449         fprintf(f, "%scached_packets=%s\n", prefix,
1450                 sm->last_recv_radius ? "[RX RADIUS]" : "");
1451
1452         eapol_auth_dump_state(f, prefix, sm);
1453 }
1454 #endif /* HOSTAPD_DUMP_STATE */
1455
1456
1457 static int ieee802_1x_rekey_broadcast(struct hostapd_data *hapd)
1458 {
1459         if (hapd->conf->default_wep_key_len < 1)
1460                 return 0;
1461
1462         os_free(hapd->default_wep_key);
1463         hapd->default_wep_key = os_malloc(hapd->conf->default_wep_key_len);
1464         if (hapd->default_wep_key == NULL ||
1465             os_get_random(hapd->default_wep_key,
1466                           hapd->conf->default_wep_key_len)) {
1467                 printf("Could not generate random WEP key.\n");
1468                 os_free(hapd->default_wep_key);
1469                 hapd->default_wep_key = NULL;
1470                 return -1;
1471         }
1472
1473         wpa_hexdump_key(MSG_DEBUG, "IEEE 802.1X: New default WEP key",
1474                         hapd->default_wep_key,
1475                         hapd->conf->default_wep_key_len);
1476
1477         return 0;
1478 }
1479
1480
1481 static int ieee802_1x_sta_key_available(struct hostapd_data *hapd,
1482                                         struct sta_info *sta, void *ctx)
1483 {
1484         if (sta->eapol_sm) {
1485                 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
1486                 eapol_auth_step(sta->eapol_sm);
1487         }
1488         return 0;
1489 }
1490
1491
1492 static void ieee802_1x_rekey(void *eloop_ctx, void *timeout_ctx)
1493 {
1494         struct hostapd_data *hapd = eloop_ctx;
1495
1496         if (hapd->default_wep_key_idx >= 3)
1497                 hapd->default_wep_key_idx =
1498                         hapd->conf->individual_wep_key_len > 0 ? 1 : 0;
1499         else
1500                 hapd->default_wep_key_idx++;
1501
1502         wpa_printf(MSG_DEBUG, "IEEE 802.1X: New default WEP key index %d",
1503                    hapd->default_wep_key_idx);
1504
1505         if (ieee802_1x_rekey_broadcast(hapd)) {
1506                 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1507                                HOSTAPD_LEVEL_WARNING, "failed to generate a "
1508                                "new broadcast key");
1509                 os_free(hapd->default_wep_key);
1510                 hapd->default_wep_key = NULL;
1511                 return;
1512         }
1513
1514         /* TODO: Could setup key for RX here, but change default TX keyid only
1515          * after new broadcast key has been sent to all stations. */
1516         if (hostapd_set_encryption(hapd->conf->iface, hapd, "WEP", NULL,
1517                                    hapd->default_wep_key_idx,
1518                                    hapd->default_wep_key,
1519                                    hapd->conf->default_wep_key_len, 1)) {
1520                 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1521                                HOSTAPD_LEVEL_WARNING, "failed to configure a "
1522                                "new broadcast key");
1523                 os_free(hapd->default_wep_key);
1524                 hapd->default_wep_key = NULL;
1525                 return;
1526         }
1527
1528         ap_for_each_sta(hapd, ieee802_1x_sta_key_available, NULL);
1529
1530         if (hapd->conf->wep_rekeying_period > 0) {
1531                 eloop_register_timeout(hapd->conf->wep_rekeying_period, 0,
1532                                        ieee802_1x_rekey, hapd, NULL);
1533         }
1534 }
1535
1536
1537 static void ieee802_1x_eapol_send(void *ctx, void *sta_ctx, u8 type,
1538                                   const u8 *data, size_t datalen)
1539 {
1540         ieee802_1x_send(ctx, sta_ctx, type, data, datalen);
1541 }
1542
1543
1544 static void ieee802_1x_aaa_send(void *ctx, void *sta_ctx,
1545                                 const u8 *data, size_t datalen)
1546 {
1547 #ifndef CONFIG_NO_RADIUS
1548         struct hostapd_data *hapd = ctx;
1549         struct sta_info *sta = sta_ctx;
1550
1551         ieee802_1x_encapsulate_radius(hapd, sta, data, datalen);
1552 #endif /* CONFIG_NO_RADIUS */
1553 }
1554
1555
1556 static void _ieee802_1x_finished(void *ctx, void *sta_ctx, int success,
1557                                  int preauth)
1558 {
1559         struct hostapd_data *hapd = ctx;
1560         struct sta_info *sta = sta_ctx;
1561         if (preauth)
1562                 rsn_preauth_finished(hapd, sta, success);
1563         else
1564                 ieee802_1x_finished(hapd, sta, success);
1565 }
1566
1567
1568 static int ieee802_1x_get_eap_user(void *ctx, const u8 *identity,
1569                                    size_t identity_len, int phase2,
1570                                    struct eap_user *user)
1571 {
1572         struct hostapd_data *hapd = ctx;
1573         const struct hostapd_eap_user *eap_user;
1574         int i, count;
1575
1576         eap_user = hostapd_get_eap_user(hapd->conf, identity,
1577                                         identity_len, phase2);
1578         if (eap_user == NULL)
1579                 return -1;
1580
1581         os_memset(user, 0, sizeof(*user));
1582         user->phase2 = phase2;
1583         count = EAP_USER_MAX_METHODS;
1584         if (count > EAP_MAX_METHODS)
1585                 count = EAP_MAX_METHODS;
1586         for (i = 0; i < count; i++) {
1587                 user->methods[i].vendor = eap_user->methods[i].vendor;
1588                 user->methods[i].method = eap_user->methods[i].method;
1589         }
1590
1591         if (eap_user->password) {
1592                 user->password = os_malloc(eap_user->password_len);
1593                 if (user->password == NULL)
1594                         return -1;
1595                 os_memcpy(user->password, eap_user->password,
1596                           eap_user->password_len);
1597                 user->password_len = eap_user->password_len;
1598         }
1599         user->force_version = eap_user->force_version;
1600         user->ttls_auth = eap_user->ttls_auth;
1601
1602         return 0;
1603 }
1604
1605
1606 static int ieee802_1x_sta_entry_alive(void *ctx, const u8 *addr)
1607 {
1608         struct hostapd_data *hapd = ctx;
1609         struct sta_info *sta;
1610         sta = ap_get_sta(hapd, addr);
1611         if (sta == NULL || sta->eapol_sm == NULL)
1612                 return 0;
1613         return 1;
1614 }
1615
1616
1617 static void ieee802_1x_logger(void *ctx, const u8 *addr,
1618                               eapol_logger_level level, const char *txt)
1619 {
1620 #ifndef CONFIG_NO_HOSTAPD_LOGGER
1621         struct hostapd_data *hapd = ctx;
1622         int hlevel;
1623
1624         switch (level) {
1625         case EAPOL_LOGGER_WARNING:
1626                 hlevel = HOSTAPD_LEVEL_WARNING;
1627                 break;
1628         case EAPOL_LOGGER_INFO:
1629                 hlevel = HOSTAPD_LEVEL_INFO;
1630                 break;
1631         case EAPOL_LOGGER_DEBUG:
1632         default:
1633                 hlevel = HOSTAPD_LEVEL_DEBUG;
1634                 break;
1635         }
1636
1637         hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE8021X, hlevel, "%s",
1638                        txt);
1639 #endif /* CONFIG_NO_HOSTAPD_LOGGER */
1640 }
1641
1642
1643 static void ieee802_1x_set_port_authorized(void *ctx, void *sta_ctx,
1644                                            int authorized)
1645 {
1646         struct hostapd_data *hapd = ctx;
1647         struct sta_info *sta = sta_ctx;
1648         ieee802_1x_set_sta_authorized(hapd, sta, authorized);
1649 }
1650
1651
1652 static void _ieee802_1x_abort_auth(void *ctx, void *sta_ctx)
1653 {
1654         struct hostapd_data *hapd = ctx;
1655         struct sta_info *sta = sta_ctx;
1656         ieee802_1x_abort_auth(hapd, sta);
1657 }
1658
1659
1660 static void _ieee802_1x_tx_key(void *ctx, void *sta_ctx)
1661 {
1662         struct hostapd_data *hapd = ctx;
1663         struct sta_info *sta = sta_ctx;
1664         ieee802_1x_tx_key(hapd, sta);
1665 }
1666
1667
1668 int ieee802_1x_init(struct hostapd_data *hapd)
1669 {
1670         int i;
1671         struct eapol_auth_config conf;
1672         struct eapol_auth_cb cb;
1673
1674         os_memset(&conf, 0, sizeof(conf));
1675         conf.hapd = hapd;
1676         conf.eap_reauth_period = hapd->conf->eap_reauth_period;
1677         conf.wpa = hapd->conf->wpa;
1678         conf.individual_wep_key_len = hapd->conf->individual_wep_key_len;
1679         conf.eap_server = hapd->conf->eap_server;
1680         conf.ssl_ctx = hapd->ssl_ctx;
1681         conf.eap_sim_db_priv = hapd->eap_sim_db_priv;
1682         conf.eap_req_id_text = hapd->conf->eap_req_id_text;
1683         conf.eap_req_id_text_len = hapd->conf->eap_req_id_text_len;
1684         conf.pac_opaque_encr_key = hapd->conf->pac_opaque_encr_key;
1685         conf.eap_fast_a_id = hapd->conf->eap_fast_a_id;
1686         conf.eap_fast_a_id_len = hapd->conf->eap_fast_a_id_len;
1687         conf.eap_fast_a_id_info = hapd->conf->eap_fast_a_id_info;
1688         conf.eap_fast_prov = hapd->conf->eap_fast_prov;
1689         conf.pac_key_lifetime = hapd->conf->pac_key_lifetime;
1690         conf.pac_key_refresh_time = hapd->conf->pac_key_refresh_time;
1691         conf.eap_sim_aka_result_ind = hapd->conf->eap_sim_aka_result_ind;
1692         conf.tnc = hapd->conf->tnc;
1693         conf.wps = hapd->wps;
1694
1695         os_memset(&cb, 0, sizeof(cb));
1696         cb.eapol_send = ieee802_1x_eapol_send;
1697         cb.aaa_send = ieee802_1x_aaa_send;
1698         cb.finished = _ieee802_1x_finished;
1699         cb.get_eap_user = ieee802_1x_get_eap_user;
1700         cb.sta_entry_alive = ieee802_1x_sta_entry_alive;
1701         cb.logger = ieee802_1x_logger;
1702         cb.set_port_authorized = ieee802_1x_set_port_authorized;
1703         cb.abort_auth = _ieee802_1x_abort_auth;
1704         cb.tx_key = _ieee802_1x_tx_key;
1705
1706         hapd->eapol_auth = eapol_auth_init(&conf, &cb);
1707         if (hapd->eapol_auth == NULL)
1708                 return -1;
1709
1710         if ((hapd->conf->ieee802_1x || hapd->conf->wpa) &&
1711             hostapd_set_ieee8021x(hapd->conf->iface, hapd, 1))
1712                 return -1;
1713
1714 #ifndef CONFIG_NO_RADIUS
1715         if (radius_client_register(hapd->radius, RADIUS_AUTH,
1716                                    ieee802_1x_receive_auth, hapd))
1717                 return -1;
1718 #endif /* CONFIG_NO_RADIUS */
1719
1720         if (hapd->conf->default_wep_key_len) {
1721                 hostapd_set_privacy(hapd, 1);
1722
1723                 for (i = 0; i < 4; i++)
1724                         hostapd_set_encryption(hapd->conf->iface, hapd,
1725                                                "none", NULL, i, NULL, 0, 0);
1726
1727                 ieee802_1x_rekey(hapd, NULL);
1728
1729                 if (hapd->default_wep_key == NULL)
1730                         return -1;
1731         }
1732
1733         return 0;
1734 }
1735
1736
1737 void ieee802_1x_deinit(struct hostapd_data *hapd)
1738 {
1739         eloop_cancel_timeout(ieee802_1x_rekey, hapd, NULL);
1740
1741         if (hapd->driver != NULL &&
1742             (hapd->conf->ieee802_1x || hapd->conf->wpa))
1743                 hostapd_set_ieee8021x(hapd->conf->iface, hapd, 0);
1744
1745         eapol_auth_deinit(hapd->eapol_auth);
1746         hapd->eapol_auth = NULL;
1747 }
1748
1749
1750 int ieee802_1x_reconfig(struct hostapd_data *hapd,
1751                         struct hostapd_config *oldconf,
1752                         struct hostapd_bss_config *oldbss)
1753 {
1754         ieee802_1x_deinit(hapd);
1755         return ieee802_1x_init(hapd);
1756 }
1757
1758
1759 int ieee802_1x_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
1760                          const u8 *buf, size_t len, int ack)
1761 {
1762         struct ieee80211_hdr *hdr;
1763         struct ieee802_1x_hdr *xhdr;
1764         struct ieee802_1x_eapol_key *key;
1765         u8 *pos;
1766         const unsigned char rfc1042_hdr[ETH_ALEN] =
1767                 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
1768
1769         if (sta == NULL)
1770                 return -1;
1771         if (len < sizeof(*hdr) + sizeof(rfc1042_hdr) + 2 + sizeof(*xhdr))
1772                 return 0;
1773
1774         hdr = (struct ieee80211_hdr *) buf;
1775         pos = (u8 *) (hdr + 1);
1776         if (os_memcmp(pos, rfc1042_hdr, sizeof(rfc1042_hdr)) != 0)
1777                 return 0;
1778         pos += sizeof(rfc1042_hdr);
1779         if (WPA_GET_BE16(pos) != ETH_P_PAE)
1780                 return 0;
1781         pos += 2;
1782
1783         xhdr = (struct ieee802_1x_hdr *) pos;
1784         pos += sizeof(*xhdr);
1785
1786         wpa_printf(MSG_DEBUG, "IEEE 802.1X: " MACSTR " TX status - version=%d "
1787                    "type=%d length=%d - ack=%d",
1788                    MAC2STR(sta->addr), xhdr->version, xhdr->type,
1789                    be_to_host16(xhdr->length), ack);
1790
1791         /* EAPOL EAP-Packet packets are eventually re-sent by either Supplicant
1792          * or Authenticator state machines, but EAPOL-Key packets are not
1793          * retransmitted in case of failure. Try to re-sent failed EAPOL-Key
1794          * packets couple of times because otherwise STA keys become
1795          * unsynchronized with AP. */
1796         if (xhdr->type == IEEE802_1X_TYPE_EAPOL_KEY && !ack &&
1797             pos + sizeof(*key) <= buf + len) {
1798                 key = (struct ieee802_1x_eapol_key *) pos;
1799                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1800                                HOSTAPD_LEVEL_DEBUG, "did not Ack EAPOL-Key "
1801                                "frame (%scast index=%d)",
1802                                key->key_index & BIT(7) ? "uni" : "broad",
1803                                key->key_index & ~BIT(7));
1804                 /* TODO: re-send EAPOL-Key couple of times (with short delay
1805                  * between them?). If all attempt fail, report error and
1806                  * deauthenticate STA so that it will get new keys when
1807                  * authenticating again (e.g., after returning in range).
1808                  * Separate limit/transmit state needed both for unicast and
1809                  * broadcast keys(?) */
1810         }
1811         /* TODO: could move unicast key configuration from ieee802_1x_tx_key()
1812          * to here and change the key only if the EAPOL-Key packet was Acked.
1813          */
1814
1815         return 1;
1816 }
1817
1818
1819 u8 * ieee802_1x_get_identity(struct eapol_state_machine *sm, size_t *len)
1820 {
1821         if (sm == NULL || sm->identity == NULL)
1822                 return NULL;
1823
1824         *len = sm->identity_len;
1825         return sm->identity;
1826 }
1827
1828
1829 u8 * ieee802_1x_get_radius_class(struct eapol_state_machine *sm, size_t *len,
1830                                  int idx)
1831 {
1832         if (sm == NULL || sm->radius_class.attr == NULL ||
1833             idx >= (int) sm->radius_class.count)
1834                 return NULL;
1835
1836         *len = sm->radius_class.attr[idx].len;
1837         return sm->radius_class.attr[idx].data;
1838 }
1839
1840
1841 const u8 * ieee802_1x_get_key(struct eapol_state_machine *sm, size_t *len)
1842 {
1843         if (sm == NULL)
1844                 return NULL;
1845
1846         *len = sm->eap_if->eapKeyDataLen;
1847         return sm->eap_if->eapKeyData;
1848 }
1849
1850
1851 void ieee802_1x_notify_port_enabled(struct eapol_state_machine *sm,
1852                                     int enabled)
1853 {
1854         if (sm == NULL)
1855                 return;
1856         sm->eap_if->portEnabled = enabled ? TRUE : FALSE;
1857         eapol_auth_step(sm);
1858 }
1859
1860
1861 void ieee802_1x_notify_port_valid(struct eapol_state_machine *sm,
1862                                   int valid)
1863 {
1864         if (sm == NULL)
1865                 return;
1866         sm->portValid = valid ? TRUE : FALSE;
1867         eapol_auth_step(sm);
1868 }
1869
1870
1871 void ieee802_1x_notify_pre_auth(struct eapol_state_machine *sm, int pre_auth)
1872 {
1873         if (sm == NULL)
1874                 return;
1875         if (pre_auth)
1876                 sm->flags |= EAPOL_SM_PREAUTH;
1877         else
1878                 sm->flags &= ~EAPOL_SM_PREAUTH;
1879 }
1880
1881
1882 static const char * bool_txt(Boolean bool)
1883 {
1884         return bool ? "TRUE" : "FALSE";
1885 }
1886
1887
1888 int ieee802_1x_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
1889 {
1890         /* TODO */
1891         return 0;
1892 }
1893
1894
1895 int ieee802_1x_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
1896                            char *buf, size_t buflen)
1897 {
1898         int len = 0, ret;
1899         struct eapol_state_machine *sm = sta->eapol_sm;
1900
1901         if (sm == NULL)
1902                 return 0;
1903
1904         ret = os_snprintf(buf + len, buflen - len,
1905                           "dot1xPaePortNumber=%d\n"
1906                           "dot1xPaePortProtocolVersion=%d\n"
1907                           "dot1xPaePortCapabilities=1\n"
1908                           "dot1xPaePortInitialize=%d\n"
1909                           "dot1xPaePortReauthenticate=FALSE\n",
1910                           sta->aid,
1911                           EAPOL_VERSION,
1912                           sm->initialize);
1913         if (ret < 0 || (size_t) ret >= buflen - len)
1914                 return len;
1915         len += ret;
1916
1917         /* dot1xAuthConfigTable */
1918         ret = os_snprintf(buf + len, buflen - len,
1919                           "dot1xAuthPaeState=%d\n"
1920                           "dot1xAuthBackendAuthState=%d\n"
1921                           "dot1xAuthAdminControlledDirections=%d\n"
1922                           "dot1xAuthOperControlledDirections=%d\n"
1923                           "dot1xAuthAuthControlledPortStatus=%d\n"
1924                           "dot1xAuthAuthControlledPortControl=%d\n"
1925                           "dot1xAuthQuietPeriod=%u\n"
1926                           "dot1xAuthServerTimeout=%u\n"
1927                           "dot1xAuthReAuthPeriod=%u\n"
1928                           "dot1xAuthReAuthEnabled=%s\n"
1929                           "dot1xAuthKeyTxEnabled=%s\n",
1930                           sm->auth_pae_state + 1,
1931                           sm->be_auth_state + 1,
1932                           sm->adminControlledDirections,
1933                           sm->operControlledDirections,
1934                           sm->authPortStatus,
1935                           sm->portControl,
1936                           sm->quietPeriod,
1937                           sm->serverTimeout,
1938                           sm->reAuthPeriod,
1939                           bool_txt(sm->reAuthEnabled),
1940                           bool_txt(sm->keyTxEnabled));
1941         if (ret < 0 || (size_t) ret >= buflen - len)
1942                 return len;
1943         len += ret;
1944
1945         /* dot1xAuthStatsTable */
1946         ret = os_snprintf(buf + len, buflen - len,
1947                           "dot1xAuthEapolFramesRx=%u\n"
1948                           "dot1xAuthEapolFramesTx=%u\n"
1949                           "dot1xAuthEapolStartFramesRx=%u\n"
1950                           "dot1xAuthEapolLogoffFramesRx=%u\n"
1951                           "dot1xAuthEapolRespIdFramesRx=%u\n"
1952                           "dot1xAuthEapolRespFramesRx=%u\n"
1953                           "dot1xAuthEapolReqIdFramesTx=%u\n"
1954                           "dot1xAuthEapolReqFramesTx=%u\n"
1955                           "dot1xAuthInvalidEapolFramesRx=%u\n"
1956                           "dot1xAuthEapLengthErrorFramesRx=%u\n"
1957                           "dot1xAuthLastEapolFrameVersion=%u\n"
1958                           "dot1xAuthLastEapolFrameSource=" MACSTR "\n",
1959                           sm->dot1xAuthEapolFramesRx,
1960                           sm->dot1xAuthEapolFramesTx,
1961                           sm->dot1xAuthEapolStartFramesRx,
1962                           sm->dot1xAuthEapolLogoffFramesRx,
1963                           sm->dot1xAuthEapolRespIdFramesRx,
1964                           sm->dot1xAuthEapolRespFramesRx,
1965                           sm->dot1xAuthEapolReqIdFramesTx,
1966                           sm->dot1xAuthEapolReqFramesTx,
1967                           sm->dot1xAuthInvalidEapolFramesRx,
1968                           sm->dot1xAuthEapLengthErrorFramesRx,
1969                           sm->dot1xAuthLastEapolFrameVersion,
1970                           MAC2STR(sm->addr));
1971         if (ret < 0 || (size_t) ret >= buflen - len)
1972                 return len;
1973         len += ret;
1974
1975         /* dot1xAuthDiagTable */
1976         ret = os_snprintf(buf + len, buflen - len,
1977                           "dot1xAuthEntersConnecting=%u\n"
1978                           "dot1xAuthEapLogoffsWhileConnecting=%u\n"
1979                           "dot1xAuthEntersAuthenticating=%u\n"
1980                           "dot1xAuthAuthSuccessesWhileAuthenticating=%u\n"
1981                           "dot1xAuthAuthTimeoutsWhileAuthenticating=%u\n"
1982                           "dot1xAuthAuthFailWhileAuthenticating=%u\n"
1983                           "dot1xAuthAuthEapStartsWhileAuthenticating=%u\n"
1984                           "dot1xAuthAuthEapLogoffWhileAuthenticating=%u\n"
1985                           "dot1xAuthAuthReauthsWhileAuthenticated=%u\n"
1986                           "dot1xAuthAuthEapStartsWhileAuthenticated=%u\n"
1987                           "dot1xAuthAuthEapLogoffWhileAuthenticated=%u\n"
1988                           "dot1xAuthBackendResponses=%u\n"
1989                           "dot1xAuthBackendAccessChallenges=%u\n"
1990                           "dot1xAuthBackendOtherRequestsToSupplicant=%u\n"
1991                           "dot1xAuthBackendAuthSuccesses=%u\n"
1992                           "dot1xAuthBackendAuthFails=%u\n",
1993                           sm->authEntersConnecting,
1994                           sm->authEapLogoffsWhileConnecting,
1995                           sm->authEntersAuthenticating,
1996                           sm->authAuthSuccessesWhileAuthenticating,
1997                           sm->authAuthTimeoutsWhileAuthenticating,
1998                           sm->authAuthFailWhileAuthenticating,
1999                           sm->authAuthEapStartsWhileAuthenticating,
2000                           sm->authAuthEapLogoffWhileAuthenticating,
2001                           sm->authAuthReauthsWhileAuthenticated,
2002                           sm->authAuthEapStartsWhileAuthenticated,
2003                           sm->authAuthEapLogoffWhileAuthenticated,
2004                           sm->backendResponses,
2005                           sm->backendAccessChallenges,
2006                           sm->backendOtherRequestsToSupplicant,
2007                           sm->backendAuthSuccesses,
2008                           sm->backendAuthFails);
2009         if (ret < 0 || (size_t) ret >= buflen - len)
2010                 return len;
2011         len += ret;
2012
2013         /* dot1xAuthSessionStatsTable */
2014         ret = os_snprintf(buf + len, buflen - len,
2015                           /* TODO: dot1xAuthSessionOctetsRx */
2016                           /* TODO: dot1xAuthSessionOctetsTx */
2017                           /* TODO: dot1xAuthSessionFramesRx */
2018                           /* TODO: dot1xAuthSessionFramesTx */
2019                           "dot1xAuthSessionId=%08X-%08X\n"
2020                           "dot1xAuthSessionAuthenticMethod=%d\n"
2021                           "dot1xAuthSessionTime=%u\n"
2022                           "dot1xAuthSessionTerminateCause=999\n"
2023                           "dot1xAuthSessionUserName=%s\n",
2024                           sta->acct_session_id_hi, sta->acct_session_id_lo,
2025                           (wpa_key_mgmt_wpa_ieee8021x(
2026                                    wpa_auth_sta_key_mgmt(sta->wpa_sm))) ?
2027                           1 : 2,
2028                           (unsigned int) (time(NULL) -
2029                                           sta->acct_session_start),
2030                           sm->identity);
2031         if (ret < 0 || (size_t) ret >= buflen - len)
2032                 return len;
2033         len += ret;
2034
2035         return len;
2036 }
2037
2038
2039 static void ieee802_1x_finished(struct hostapd_data *hapd,
2040                                 struct sta_info *sta, int success)
2041 {
2042         const u8 *key;
2043         size_t len;
2044         /* TODO: get PMKLifetime from WPA parameters */
2045         static const int dot11RSNAConfigPMKLifetime = 43200;
2046
2047         key = ieee802_1x_get_key(sta->eapol_sm, &len);
2048         if (success && key && len >= PMK_LEN &&
2049             wpa_auth_pmksa_add(sta->wpa_sm, key, dot11RSNAConfigPMKLifetime,
2050                                sta->eapol_sm) == 0) {
2051                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
2052                                HOSTAPD_LEVEL_DEBUG,
2053                                "Added PMKSA cache entry (IEEE 802.1X)");
2054         }
2055 }