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