src/ap/ieee802_1x.c

   1 /*
   2  * hostapd / IEEE 802.1X-2004 Authenticator
   3  * Copyright (c) 2002-2011, 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 "utils/includes.h"
  16
  17 #include "utils/common.h"
  18 #include "utils/eloop.h"
  19 #include "crypto/md5.h"
  20 #include "crypto/crypto.h"
  21 #include "crypto/random.h"
  22 #include "common/ieee802_11_defs.h"
  23 #include "common/wpa_ctrl.h"
  24 #include "radius/radius.h"
  25 #include "radius/radius_client.h"
  26 #include "eap_server/eap.h"
  27 #include "eap_common/eap_wsc_common.h"
  28 #include "eapol_auth/eapol_auth_sm.h"
  29 #include "eapol_auth/eapol_auth_sm_i.h"
  30 #include "hostapd.h"
  31 #include "accounting.h"
  32 #include "sta_info.h"
  33 #include "wpa_auth.h"
  34 #include "preauth_auth.h"
  35 #include "pmksa_cache_auth.h"
  36 #include "ap_config.h"
  37 #include "ap_drv_ops.h"
  38 #include "ieee802_1x.h"
  39
  40
  41 static void ieee802_1x_finished(struct hostapd_data *hapd,
  42                                 struct sta_info *sta, int success);
  43
  44
  45 static void ieee802_1x_send(struct hostapd_data *hapd, struct sta_info *sta,
  46                             u8 type, const u8 *data, size_t datalen)
  47 {
  48         u8 *buf;
  49         struct ieee802_1x_hdr *xhdr;
  50         size_t len;
  51         int encrypt = 0;
  52
  53         len = sizeof(*xhdr) + datalen;
  54         buf = os_zalloc(len);
  55         if (buf == NULL) {
  56                 wpa_printf(MSG_ERROR, "malloc() failed for "
  57                            "ieee802_1x_send(len=%lu)",
  58                            (unsigned long) len);
  59                 return;
  60         }
  61
  62         xhdr = (struct ieee802_1x_hdr *) buf;
  63         xhdr->version = hapd->conf->eapol_version;
  64         xhdr->type = type;
  65         xhdr->length = host_to_be16(datalen);
  66
  67         if (datalen > 0 && data != NULL)
  68                 os_memcpy(xhdr + 1, data, datalen);
  69
  70         if (wpa_auth_pairwise_set(sta->wpa_sm))
  71                 encrypt = 1;
  72         if (sta->flags & WLAN_STA_PREAUTH) {
  73                 rsn_preauth_send(hapd, sta, buf, len);
  74         } else {
  75                 hostapd_drv_hapd_send_eapol(hapd, sta->addr, buf, len,
  76                                             encrypt, sta->flags);
  77         }
  78
  79         os_free(buf);
  80 }
  81
  82
  83 void ieee802_1x_set_sta_authorized(struct hostapd_data *hapd,
  84                                    struct sta_info *sta, int authorized)
  85 {
  86         int res;
  87
  88         if (sta->flags & WLAN_STA_PREAUTH)
  89                 return;
  90
  91         if (authorized) {
  92                 if (!ap_sta_is_authorized(sta))
  93                         wpa_msg(hapd->msg_ctx, MSG_INFO,
  94                                 AP_STA_CONNECTED MACSTR, MAC2STR(sta->addr));
  95                 ap_sta_set_authorized(hapd, sta, 1);
  96                 res = hostapd_set_authorized(hapd, sta, 1);
  97                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
  98                                HOSTAPD_LEVEL_DEBUG, "authorizing port");
  99         } else {
 100                 if (ap_sta_is_authorized(sta) && (sta->flags & WLAN_STA_ASSOC))
 101                         wpa_msg(hapd->msg_ctx, MSG_INFO,
 102                                 AP_STA_DISCONNECTED MACSTR,
 103                                 MAC2STR(sta->addr));
 104                 ap_sta_set_authorized(hapd, sta, 0);
 105                 res = hostapd_set_authorized(hapd, sta, 0);
 106                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 107                                HOSTAPD_LEVEL_DEBUG, "unauthorizing port");
 108         }
 109
 110         if (res && errno != ENOENT) {
 111                 printf("Could not set station " MACSTR " flags for kernel "
 112                        "driver (errno=%d).\n", MAC2STR(sta->addr), errno);
 113         }
 114
 115         if (authorized)
 116                 accounting_sta_start(hapd, sta);
 117 }
 118
 119
 120 static void ieee802_1x_tx_key_one(struct hostapd_data *hapd,
 121                                   struct sta_info *sta,
 122                                   int idx, int broadcast,
 123                                   u8 *key_data, size_t key_len)
 124 {
 125         u8 *buf, *ekey;
 126         struct ieee802_1x_hdr *hdr;
 127         struct ieee802_1x_eapol_key *key;
 128         size_t len, ekey_len;
 129         struct eapol_state_machine *sm = sta->eapol_sm;
 130
 131         if (sm == NULL)
 132                 return;
 133
 134         len = sizeof(*key) + key_len;
 135         buf = os_zalloc(sizeof(*hdr) + len);
 136         if (buf == NULL)
 137                 return;
 138
 139         hdr = (struct ieee802_1x_hdr *) buf;
 140         key = (struct ieee802_1x_eapol_key *) (hdr + 1);
 141         key->type = EAPOL_KEY_TYPE_RC4;
 142         key->key_length = htons(key_len);
 143         wpa_get_ntp_timestamp(key->replay_counter);
 144
 145         if (random_get_bytes(key->key_iv, sizeof(key->key_iv))) {
 146                 wpa_printf(MSG_ERROR, "Could not get random numbers");
 147                 os_free(buf);
 148                 return;
 149         }
 150
 151         key->key_index = idx | (broadcast ? 0 : BIT(7));
 152         if (hapd->conf->eapol_key_index_workaround) {
 153                 /* According to some information, WinXP Supplicant seems to
 154                  * interpret bit7 as an indication whether the key is to be
 155                  * activated, so make it possible to enable workaround that
 156                  * sets this bit for all keys. */
 157                 key->key_index |= BIT(7);
 158         }
 159
 160         /* Key is encrypted using "Key-IV + MSK[0..31]" as the RC4-key and
 161          * MSK[32..63] is used to sign the message. */
 162         if (sm->eap_if->eapKeyData == NULL || sm->eap_if->eapKeyDataLen < 64) {
 163                 wpa_printf(MSG_ERROR, "No eapKeyData available for encrypting "
 164                            "and signing EAPOL-Key");
 165                 os_free(buf);
 166                 return;
 167         }
 168         os_memcpy((u8 *) (key + 1), key_data, key_len);
 169         ekey_len = sizeof(key->key_iv) + 32;
 170         ekey = os_malloc(ekey_len);
 171         if (ekey == NULL) {
 172                 wpa_printf(MSG_ERROR, "Could not encrypt key");
 173                 os_free(buf);
 174                 return;
 175         }
 176         os_memcpy(ekey, key->key_iv, sizeof(key->key_iv));
 177         os_memcpy(ekey + sizeof(key->key_iv), sm->eap_if->eapKeyData, 32);
 178         rc4_skip(ekey, ekey_len, 0, (u8 *) (key + 1), key_len);
 179         os_free(ekey);
 180
 181         /* This header is needed here for HMAC-MD5, but it will be regenerated
 182          * in ieee802_1x_send() */
 183         hdr->version = hapd->conf->eapol_version;
 184         hdr->type = IEEE802_1X_TYPE_EAPOL_KEY;
 185         hdr->length = host_to_be16(len);
 186         hmac_md5(sm->eap_if->eapKeyData + 32, 32, buf, sizeof(*hdr) + len,
 187                  key->key_signature);
 188
 189         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key to " MACSTR
 190                    " (%s index=%d)", MAC2STR(sm->addr),
 191                    broadcast ? "broadcast" : "unicast", idx);
 192         ieee802_1x_send(hapd, sta, IEEE802_1X_TYPE_EAPOL_KEY, (u8 *) key, len);
 193         if (sta->eapol_sm)
 194                 sta->eapol_sm->dot1xAuthEapolFramesTx++;
 195         os_free(buf);
 196 }
 197
 198
 199 #ifndef CONFIG_NO_VLAN
 200 static struct hostapd_wep_keys *
 201 ieee802_1x_group_alloc(struct hostapd_data *hapd, const char *ifname)
 202 {
 203         struct hostapd_wep_keys *key;
 204
 205         key = os_zalloc(sizeof(*key));
 206         if (key == NULL)
 207                 return NULL;
 208
 209         key->default_len = hapd->conf->default_wep_key_len;
 210
 211         if (key->idx >= hapd->conf->broadcast_key_idx_max ||
 212             key->idx < hapd->conf->broadcast_key_idx_min)
 213                 key->idx = hapd->conf->broadcast_key_idx_min;
 214         else
 215                 key->idx++;
 216
 217         if (!key->key[key->idx])
 218                 key->key[key->idx] = os_malloc(key->default_len);
 219         if (key->key[key->idx] == NULL ||
 220             random_get_bytes(key->key[key->idx], key->default_len)) {
 221                 printf("Could not generate random WEP key (dynamic VLAN).\n");
 222                 os_free(key->key[key->idx]);
 223                 key->key[key->idx] = NULL;
 224                 os_free(key);
 225                 return NULL;
 226         }
 227         key->len[key->idx] = key->default_len;
 228
 229         wpa_printf(MSG_DEBUG, "%s: Default WEP idx %d for dynamic VLAN\n",
 230                    ifname, key->idx);
 231         wpa_hexdump_key(MSG_DEBUG, "Default WEP key (dynamic VLAN)",
 232                         key->key[key->idx], key->len[key->idx]);
 233
 234         if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_WEP,
 235                                 broadcast_ether_addr, key->idx, 1,
 236                                 NULL, 0, key->key[key->idx],
 237                                 key->len[key->idx]))
 238                 printf("Could not set dynamic VLAN WEP encryption key.\n");
 239
 240         hostapd_set_drv_ieee8021x(hapd, ifname, 1);
 241
 242         return key;
 243 }
 244
 245
 246 static struct hostapd_wep_keys *
 247 ieee802_1x_get_group(struct hostapd_data *hapd, struct hostapd_ssid *ssid,
 248                      size_t vlan_id)
 249 {
 250         const char *ifname;
 251
 252         if (vlan_id == 0)
 253                 return &ssid->wep;
 254
 255         if (vlan_id <= ssid->max_dyn_vlan_keys && ssid->dyn_vlan_keys &&
 256             ssid->dyn_vlan_keys[vlan_id])
 257                 return ssid->dyn_vlan_keys[vlan_id];
 258
 259         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Creating new group "
 260                    "state machine for VLAN ID %lu",
 261                    (unsigned long) vlan_id);
 262
 263         ifname = hostapd_get_vlan_id_ifname(hapd->conf->vlan, vlan_id);
 264         if (ifname == NULL) {
 265                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Unknown VLAN ID %lu - "
 266                            "cannot create group key state machine",
 267                            (unsigned long) vlan_id);
 268                 return NULL;
 269         }
 270
 271         if (ssid->dyn_vlan_keys == NULL) {
 272                 int size = (vlan_id + 1) * sizeof(ssid->dyn_vlan_keys[0]);
 273                 ssid->dyn_vlan_keys = os_zalloc(size);
 274                 if (ssid->dyn_vlan_keys == NULL)
 275                         return NULL;
 276                 ssid->max_dyn_vlan_keys = vlan_id;
 277         }
 278
 279         if (ssid->max_dyn_vlan_keys < vlan_id) {
 280                 struct hostapd_wep_keys **na;
 281                 int size = (vlan_id + 1) * sizeof(ssid->dyn_vlan_keys[0]);
 282                 na = os_realloc(ssid->dyn_vlan_keys, size);
 283                 if (na == NULL)
 284                         return NULL;
 285                 ssid->dyn_vlan_keys = na;
 286                 os_memset(&ssid->dyn_vlan_keys[ssid->max_dyn_vlan_keys + 1], 0,
 287                           (vlan_id - ssid->max_dyn_vlan_keys) *
 288                           sizeof(ssid->dyn_vlan_keys[0]));
 289                 ssid->max_dyn_vlan_keys = vlan_id;
 290         }
 291
 292         ssid->dyn_vlan_keys[vlan_id] = ieee802_1x_group_alloc(hapd, ifname);
 293
 294         return ssid->dyn_vlan_keys[vlan_id];
 295 }
 296 #endif /* CONFIG_NO_VLAN */
 297
 298
 299 void ieee802_1x_tx_key(struct hostapd_data *hapd, struct sta_info *sta)
 300 {
 301         struct eapol_authenticator *eapol = hapd->eapol_auth;
 302         struct eapol_state_machine *sm = sta->eapol_sm;
 303 #ifndef CONFIG_NO_VLAN
 304         struct hostapd_wep_keys *key = NULL;
 305         int vlan_id;
 306 #endif /* CONFIG_NO_VLAN */
 307
 308         if (sm == NULL || !sm->eap_if->eapKeyData)
 309                 return;
 310
 311         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Sending EAPOL-Key(s) to " MACSTR,
 312                    MAC2STR(sta->addr));
 313
 314 #ifndef CONFIG_NO_VLAN
 315         vlan_id = sta->vlan_id;
 316         if (vlan_id < 0 || vlan_id > MAX_VLAN_ID)
 317                 vlan_id = 0;
 318
 319         if (vlan_id) {
 320                 key = ieee802_1x_get_group(hapd, sta->ssid, vlan_id);
 321                 if (key && key->key[key->idx])
 322                         ieee802_1x_tx_key_one(hapd, sta, key->idx, 1,
 323                                               key->key[key->idx],
 324                                               key->len[key->idx]);
 325         } else
 326 #endif /* CONFIG_NO_VLAN */
 327         if (eapol->default_wep_key) {
 328                 ieee802_1x_tx_key_one(hapd, sta, eapol->default_wep_key_idx, 1,
 329                                       eapol->default_wep_key,
 330                                       hapd->conf->default_wep_key_len);
 331         }
 332
 333         if (hapd->conf->individual_wep_key_len > 0) {
 334                 u8 *ikey;
 335                 ikey = os_malloc(hapd->conf->individual_wep_key_len);
 336                 if (ikey == NULL ||
 337                     random_get_bytes(ikey, hapd->conf->individual_wep_key_len))
 338                 {
 339                         wpa_printf(MSG_ERROR, "Could not generate random "
 340                                    "individual WEP key.");
 341                         os_free(ikey);
 342                         return;
 343                 }
 344
 345                 wpa_hexdump_key(MSG_DEBUG, "Individual WEP key",
 346                                 ikey, hapd->conf->individual_wep_key_len);
 347
 348                 ieee802_1x_tx_key_one(hapd, sta, 0, 0, ikey,
 349                                       hapd->conf->individual_wep_key_len);
 350
 351                 /* TODO: set encryption in TX callback, i.e., only after STA
 352                  * has ACKed EAPOL-Key frame */
 353                 if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
 354                                         sta->addr, 0, 1, NULL, 0, ikey,
 355                                         hapd->conf->individual_wep_key_len)) {
 356                         wpa_printf(MSG_ERROR, "Could not set individual WEP "
 357                                    "encryption.");
 358                 }
 359
 360                 os_free(ikey);
 361         }
 362 }
 363
 364
 365 const char *radius_mode_txt(struct hostapd_data *hapd)
 366 {
 367         switch (hapd->iface->conf->hw_mode) {
 368         case HOSTAPD_MODE_IEEE80211A:
 369                 return "802.11a";
 370         case HOSTAPD_MODE_IEEE80211G:
 371                 return "802.11g";
 372         case HOSTAPD_MODE_IEEE80211B:
 373         default:
 374                 return "802.11b";
 375         }
 376 }
 377
 378
 379 int radius_sta_rate(struct hostapd_data *hapd, struct sta_info *sta)
 380 {
 381         int i;
 382         u8 rate = 0;
 383
 384         for (i = 0; i < sta->supported_rates_len; i++)
 385                 if ((sta->supported_rates[i] & 0x7f) > rate)
 386                         rate = sta->supported_rates[i] & 0x7f;
 387
 388         return rate;
 389 }
 390
 391
 392 #ifndef CONFIG_NO_RADIUS
 393 static void ieee802_1x_learn_identity(struct hostapd_data *hapd,
 394                                       struct eapol_state_machine *sm,
 395                                       const u8 *eap, size_t len)
 396 {
 397         const u8 *identity;
 398         size_t identity_len;
 399
 400         if (len <= sizeof(struct eap_hdr) ||
 401             eap[sizeof(struct eap_hdr)] != EAP_TYPE_IDENTITY)
 402                 return;
 403
 404         identity = eap_get_identity(sm->eap, &identity_len);
 405         if (identity == NULL)
 406                 return;
 407
 408         /* Save station identity for future RADIUS packets */
 409         os_free(sm->identity);
 410         sm->identity = os_malloc(identity_len + 1);
 411         if (sm->identity == NULL) {
 412                 sm->identity_len = 0;
 413                 return;
 414         }
 415
 416         os_memcpy(sm->identity, identity, identity_len);
 417         sm->identity_len = identity_len;
 418         sm->identity[identity_len] = '\0';
 419         hostapd_logger(hapd, sm->addr, HOSTAPD_MODULE_IEEE8021X,
 420                        HOSTAPD_LEVEL_DEBUG, "STA identity '%s'", sm->identity);
 421         sm->dot1xAuthEapolRespIdFramesRx++;
 422 }
 423
 424
 425 static void ieee802_1x_encapsulate_radius(struct hostapd_data *hapd,
 426                                           struct sta_info *sta,
 427                                           const u8 *eap, size_t len)
 428 {
 429         struct radius_msg *msg;
 430         char buf[128];
 431         struct eapol_state_machine *sm = sta->eapol_sm;
 432
 433         if (sm == NULL)
 434                 return;
 435
 436         ieee802_1x_learn_identity(hapd, sm, eap, len);
 437
 438         wpa_printf(MSG_DEBUG, "Encapsulating EAP message into a RADIUS "
 439                    "packet");
 440
 441         sm->radius_identifier = radius_client_get_id(hapd->radius);
 442         msg = radius_msg_new(RADIUS_CODE_ACCESS_REQUEST,
 443                              sm->radius_identifier);
 444         if (msg == NULL) {
 445                 printf("Could not create net RADIUS packet\n");
 446                 return;
 447         }
 448
 449         radius_msg_make_authenticator(msg, (u8 *) sta, sizeof(*sta));
 450
 451         if (sm->identity &&
 452             !radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME,
 453                                  sm->identity, sm->identity_len)) {
 454                 printf("Could not add User-Name\n");
 455                 goto fail;
 456         }
 457
 458         if (hapd->conf->own_ip_addr.af == AF_INET &&
 459             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS,
 460                                  (u8 *) &hapd->conf->own_ip_addr.u.v4, 4)) {
 461                 printf("Could not add NAS-IP-Address\n");
 462                 goto fail;
 463         }
 464
 465 #ifdef CONFIG_IPV6
 466         if (hapd->conf->own_ip_addr.af == AF_INET6 &&
 467             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IPV6_ADDRESS,
 468                                  (u8 *) &hapd->conf->own_ip_addr.u.v6, 16)) {
 469                 printf("Could not add NAS-IPv6-Address\n");
 470                 goto fail;
 471         }
 472 #endif /* CONFIG_IPV6 */
 473
 474         if (hapd->conf->nas_identifier &&
 475             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IDENTIFIER,
 476                                  (u8 *) hapd->conf->nas_identifier,
 477                                  os_strlen(hapd->conf->nas_identifier))) {
 478                 printf("Could not add NAS-Identifier\n");
 479                 goto fail;
 480         }
 481
 482         if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT, sta->aid)) {
 483                 printf("Could not add NAS-Port\n");
 484                 goto fail;
 485         }
 486
 487         os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT ":%s",
 488                     MAC2STR(hapd->own_addr), hapd->conf->ssid.ssid);
 489         buf[sizeof(buf) - 1] = '\0';
 490         if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLED_STATION_ID,
 491                                  (u8 *) buf, os_strlen(buf))) {
 492                 printf("Could not add Called-Station-Id\n");
 493                 goto fail;
 494         }
 495
 496         os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
 497                     MAC2STR(sta->addr));
 498         buf[sizeof(buf) - 1] = '\0';
 499         if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID,
 500                                  (u8 *) buf, os_strlen(buf))) {
 501                 printf("Could not add Calling-Station-Id\n");
 502                 goto fail;
 503         }
 504
 505         /* TODO: should probably check MTU from driver config; 2304 is max for
 506          * IEEE 802.11, but use 1400 to avoid problems with too large packets
 507          */
 508         if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_FRAMED_MTU, 1400)) {
 509                 printf("Could not add Framed-MTU\n");
 510                 goto fail;
 511         }
 512
 513         if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT_TYPE,
 514                                        RADIUS_NAS_PORT_TYPE_IEEE_802_11)) {
 515                 printf("Could not add NAS-Port-Type\n");
 516                 goto fail;
 517         }
 518
 519         if (sta->flags & WLAN_STA_PREAUTH) {
 520                 os_strlcpy(buf, "IEEE 802.11i Pre-Authentication",
 521                            sizeof(buf));
 522         } else {
 523                 os_snprintf(buf, sizeof(buf), "CONNECT %d%sMbps %s",
 524                             radius_sta_rate(hapd, sta) / 2,
 525                             (radius_sta_rate(hapd, sta) & 1) ? ".5" : "",
 526                             radius_mode_txt(hapd));
 527                 buf[sizeof(buf) - 1] = '\0';
 528         }
 529         if (!radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO,
 530                                  (u8 *) buf, os_strlen(buf))) {
 531                 printf("Could not add Connect-Info\n");
 532                 goto fail;
 533         }
 534
 535         if (eap && !radius_msg_add_eap(msg, eap, len)) {
 536                 printf("Could not add EAP-Message\n");
 537                 goto fail;
 538         }
 539
 540         /* State attribute must be copied if and only if this packet is
 541          * Access-Request reply to the previous Access-Challenge */
 542         if (sm->last_recv_radius &&
 543             radius_msg_get_hdr(sm->last_recv_radius)->code ==
 544             RADIUS_CODE_ACCESS_CHALLENGE) {
 545                 int res = radius_msg_copy_attr(msg, sm->last_recv_radius,
 546                                                RADIUS_ATTR_STATE);
 547                 if (res < 0) {
 548                         printf("Could not copy State attribute from previous "
 549                                "Access-Challenge\n");
 550                         goto fail;
 551                 }
 552                 if (res > 0) {
 553                         wpa_printf(MSG_DEBUG, "Copied RADIUS State Attribute");
 554                 }
 555         }
 556
 557         if (radius_client_send(hapd->radius, msg, RADIUS_AUTH, sta->addr) < 0)
 558                 goto fail;
 559
 560         return;
 561
 562  fail:
 563         radius_msg_free(msg);
 564 }
 565 #endif /* CONFIG_NO_RADIUS */
 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_server_get_name(0, 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 static struct eapol_state_machine *
 651 ieee802_1x_alloc_eapol_sm(struct hostapd_data *hapd, struct sta_info *sta)
 652 {
 653         int flags = 0;
 654         if (sta->flags & WLAN_STA_PREAUTH)
 655                 flags |= EAPOL_SM_PREAUTH;
 656         if (sta->wpa_sm) {
 657                 flags |= EAPOL_SM_USES_WPA;
 658                 if (wpa_auth_sta_get_pmksa(sta->wpa_sm))
 659                         flags |= EAPOL_SM_FROM_PMKSA_CACHE;
 660         }
 661         return eapol_auth_alloc(hapd->eapol_auth, sta->addr, flags,
 662                                 sta->wps_ie, sta->p2p_ie, sta);
 663 }
 664
 665
 666 /**
 667  * ieee802_1x_receive - Process the EAPOL frames from the Supplicant
 668  * @hapd: hostapd BSS data
 669  * @sa: Source address (sender of the EAPOL frame)
 670  * @buf: EAPOL frame
 671  * @len: Length of buf in octets
 672  *
 673  * This function is called for each incoming EAPOL frame from the interface
 674  */
 675 void ieee802_1x_receive(struct hostapd_data *hapd, const u8 *sa, const u8 *buf,
 676                         size_t len)
 677 {
 678         struct sta_info *sta;
 679         struct ieee802_1x_hdr *hdr;
 680         struct ieee802_1x_eapol_key *key;
 681         u16 datalen;
 682         struct rsn_pmksa_cache_entry *pmksa;
 683
 684         if (!hapd->conf->ieee802_1x && !hapd->conf->wpa &&
 685             !hapd->conf->wps_state)
 686                 return;
 687
 688         wpa_printf(MSG_DEBUG, "IEEE 802.1X: %lu bytes from " MACSTR,
 689                    (unsigned long) len, MAC2STR(sa));
 690         sta = ap_get_sta(hapd, sa);
 691         if (!sta || !(sta->flags & (WLAN_STA_ASSOC | WLAN_STA_PREAUTH))) {
 692                 wpa_printf(MSG_DEBUG, "IEEE 802.1X data frame from not "
 693                            "associated/Pre-authenticating STA");
 694                 return;
 695         }
 696
 697         if (len < sizeof(*hdr)) {
 698                 printf("   too short IEEE 802.1X packet\n");
 699                 return;
 700         }
 701
 702         hdr = (struct ieee802_1x_hdr *) buf;
 703         datalen = be_to_host16(hdr->length);
 704         wpa_printf(MSG_DEBUG, "   IEEE 802.1X: version=%d type=%d length=%d",
 705                    hdr->version, hdr->type, datalen);
 706
 707         if (len - sizeof(*hdr) < datalen) {
 708                 printf("   frame too short for this IEEE 802.1X packet\n");
 709                 if (sta->eapol_sm)
 710                         sta->eapol_sm->dot1xAuthEapLengthErrorFramesRx++;
 711                 return;
 712         }
 713         if (len - sizeof(*hdr) > datalen) {
 714                 wpa_printf(MSG_DEBUG, "   ignoring %lu extra octets after "
 715                            "IEEE 802.1X packet",
 716                            (unsigned long) len - sizeof(*hdr) - datalen);
 717         }
 718
 719         if (sta->eapol_sm) {
 720                 sta->eapol_sm->dot1xAuthLastEapolFrameVersion = hdr->version;
 721                 sta->eapol_sm->dot1xAuthEapolFramesRx++;
 722         }
 723
 724         key = (struct ieee802_1x_eapol_key *) (hdr + 1);
 725         if (datalen >= sizeof(struct ieee802_1x_eapol_key) &&
 726             hdr->type == IEEE802_1X_TYPE_EAPOL_KEY &&
 727             (key->type == EAPOL_KEY_TYPE_WPA ||
 728              key->type == EAPOL_KEY_TYPE_RSN)) {
 729                 wpa_receive(hapd->wpa_auth, sta->wpa_sm, (u8 *) hdr,
 730                             sizeof(*hdr) + datalen);
 731                 return;
 732         }
 733
 734         if ((!hapd->conf->ieee802_1x &&
 735              !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) ||
 736             wpa_key_mgmt_wpa_psk(wpa_auth_sta_key_mgmt(sta->wpa_sm)))
 737                 return;
 738
 739         if (!sta->eapol_sm) {
 740                 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
 741                 if (!sta->eapol_sm)
 742                         return;
 743
 744 #ifdef CONFIG_WPS
 745                 if (!hapd->conf->ieee802_1x &&
 746                     ((sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) ==
 747                      WLAN_STA_MAYBE_WPS)) {
 748                         /*
 749                          * Delay EAPOL frame transmission until a possible WPS
 750                          * STA initiates the handshake with EAPOL-Start.
 751                          */
 752                         sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
 753                 }
 754 #endif /* CONFIG_WPS */
 755
 756                 sta->eapol_sm->eap_if->portEnabled = TRUE;
 757         }
 758
 759         /* since we support version 1, we can ignore version field and proceed
 760          * as specified in version 1 standard [IEEE Std 802.1X-2001, 7.5.5] */
 761         /* TODO: actually, we are not version 1 anymore.. However, Version 2
 762          * does not change frame contents, so should be ok to process frames
 763          * more or less identically. Some changes might be needed for
 764          * verification of fields. */
 765
 766         switch (hdr->type) {
 767         case IEEE802_1X_TYPE_EAP_PACKET:
 768                 handle_eap(hapd, sta, (u8 *) (hdr + 1), datalen);
 769                 break;
 770
 771         case IEEE802_1X_TYPE_EAPOL_START:
 772                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 773                                HOSTAPD_LEVEL_DEBUG, "received EAPOL-Start "
 774                                "from STA");
 775                 sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
 776                 pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
 777                 if (pmksa) {
 778                         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
 779                                        HOSTAPD_LEVEL_DEBUG, "cached PMKSA "
 780                                        "available - ignore it since "
 781                                        "STA sent EAPOL-Start");
 782                         wpa_auth_sta_clear_pmksa(sta->wpa_sm, pmksa);
 783                 }
 784                 sta->eapol_sm->eapolStart = TRUE;
 785                 sta->eapol_sm->dot1xAuthEapolStartFramesRx++;
 786                 eap_server_clear_identity(sta->eapol_sm->eap);
 787                 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
 788                 break;
 789
 790         case IEEE802_1X_TYPE_EAPOL_LOGOFF:
 791                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 792                                HOSTAPD_LEVEL_DEBUG, "received EAPOL-Logoff "
 793                                "from STA");
 794                 sta->acct_terminate_cause =
 795                         RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
 796                 accounting_sta_stop(hapd, sta);
 797                 sta->eapol_sm->eapolLogoff = TRUE;
 798                 sta->eapol_sm->dot1xAuthEapolLogoffFramesRx++;
 799                 eap_server_clear_identity(sta->eapol_sm->eap);
 800                 break;
 801
 802         case IEEE802_1X_TYPE_EAPOL_KEY:
 803                 wpa_printf(MSG_DEBUG, "   EAPOL-Key");
 804                 if (!ap_sta_is_authorized(sta)) {
 805                         wpa_printf(MSG_DEBUG, "   Dropped key data from "
 806                                    "unauthorized Supplicant");
 807                         break;
 808                 }
 809                 break;
 810
 811         case IEEE802_1X_TYPE_EAPOL_ENCAPSULATED_ASF_ALERT:
 812                 wpa_printf(MSG_DEBUG, "   EAPOL-Encapsulated-ASF-Alert");
 813                 /* TODO: implement support for this; show data */
 814                 break;
 815
 816         default:
 817                 wpa_printf(MSG_DEBUG, "   unknown IEEE 802.1X packet type");
 818                 sta->eapol_sm->dot1xAuthInvalidEapolFramesRx++;
 819                 break;
 820         }
 821
 822         eapol_auth_step(sta->eapol_sm);
 823 }
 824
 825
 826 /**
 827  * ieee802_1x_new_station - Start IEEE 802.1X authentication
 828  * @hapd: hostapd BSS data
 829  * @sta: The station
 830  *
 831  * This function is called to start IEEE 802.1X authentication when a new
 832  * station completes IEEE 802.11 association.
 833  */
 834 void ieee802_1x_new_station(struct hostapd_data *hapd, struct sta_info *sta)
 835 {
 836         struct rsn_pmksa_cache_entry *pmksa;
 837         int reassoc = 1;
 838         int force_1x = 0;
 839
 840 #ifdef CONFIG_WPS
 841         if (hapd->conf->wps_state && hapd->conf->wpa &&
 842             (sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS))) {
 843                 /*
 844                  * Need to enable IEEE 802.1X/EAPOL state machines for possible
 845                  * WPS handshake even if IEEE 802.1X/EAPOL is not used for
 846                  * authentication in this BSS.
 847                  */
 848                 force_1x = 1;
 849         }
 850 #endif /* CONFIG_WPS */
 851
 852         if ((!force_1x && !hapd->conf->ieee802_1x) ||
 853             wpa_key_mgmt_wpa_psk(wpa_auth_sta_key_mgmt(sta->wpa_sm)))
 854                 return;
 855
 856         if (sta->eapol_sm == NULL) {
 857                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 858                                HOSTAPD_LEVEL_DEBUG, "start authentication");
 859                 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
 860                 if (sta->eapol_sm == NULL) {
 861                         hostapd_logger(hapd, sta->addr,
 862                                        HOSTAPD_MODULE_IEEE8021X,
 863                                        HOSTAPD_LEVEL_INFO,
 864                                        "failed to allocate state machine");
 865                         return;
 866                 }
 867                 reassoc = 0;
 868         }
 869
 870 #ifdef CONFIG_WPS
 871         sta->eapol_sm->flags &= ~EAPOL_SM_WAIT_START;
 872         if (!hapd->conf->ieee802_1x && !(sta->flags & WLAN_STA_WPS)) {
 873                 /*
 874                  * Delay EAPOL frame transmission until a possible WPS
 875                  * initiates the handshake with EAPOL-Start.
 876                  */
 877                 sta->eapol_sm->flags |= EAPOL_SM_WAIT_START;
 878         }
 879 #endif /* CONFIG_WPS */
 880
 881         sta->eapol_sm->eap_if->portEnabled = TRUE;
 882
 883 #ifdef CONFIG_IEEE80211R
 884         if (sta->auth_alg == WLAN_AUTH_FT) {
 885                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 886                                HOSTAPD_LEVEL_DEBUG,
 887                                "PMK from FT - skip IEEE 802.1X/EAP");
 888                 /* Setup EAPOL state machines to already authenticated state
 889                  * because of existing FT information from R0KH. */
 890                 sta->eapol_sm->keyRun = TRUE;
 891                 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
 892                 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
 893                 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
 894                 sta->eapol_sm->authSuccess = TRUE;
 895                 if (sta->eapol_sm->eap)
 896                         eap_sm_notify_cached(sta->eapol_sm->eap);
 897                 /* TODO: get vlan_id from R0KH using RRB message */
 898                 return;
 899         }
 900 #endif /* CONFIG_IEEE80211R */
 901
 902         pmksa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
 903         if (pmksa) {
 904                 int old_vlanid;
 905
 906                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 907                                HOSTAPD_LEVEL_DEBUG,
 908                                "PMK from PMKSA cache - skip IEEE 802.1X/EAP");
 909                 /* Setup EAPOL state machines to already authenticated state
 910                  * because of existing PMKSA information in the cache. */
 911                 sta->eapol_sm->keyRun = TRUE;
 912                 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
 913                 sta->eapol_sm->auth_pae_state = AUTH_PAE_AUTHENTICATING;
 914                 sta->eapol_sm->be_auth_state = BE_AUTH_SUCCESS;
 915                 sta->eapol_sm->authSuccess = TRUE;
 916                 if (sta->eapol_sm->eap)
 917                         eap_sm_notify_cached(sta->eapol_sm->eap);
 918                 old_vlanid = sta->vlan_id;
 919                 pmksa_cache_to_eapol_data(pmksa, sta->eapol_sm);
 920                 if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
 921                         sta->vlan_id = 0;
 922                 ap_sta_bind_vlan(hapd, sta, old_vlanid);
 923         } else {
 924                 if (reassoc) {
 925                         /*
 926                          * Force EAPOL state machines to start
 927                          * re-authentication without having to wait for the
 928                          * Supplicant to send EAPOL-Start.
 929                          */
 930                         sta->eapol_sm->reAuthenticate = TRUE;
 931                 }
 932                 eapol_auth_step(sta->eapol_sm);
 933         }
 934 }
 935
 936
 937 void ieee802_1x_free_station(struct sta_info *sta)
 938 {
 939         struct eapol_state_machine *sm = sta->eapol_sm;
 940
 941         if (sm == NULL)
 942                 return;
 943
 944         sta->eapol_sm = NULL;
 945
 946 #ifndef CONFIG_NO_RADIUS
 947         radius_msg_free(sm->last_recv_radius);
 948         radius_free_class(&sm->radius_class);
 949 #endif /* CONFIG_NO_RADIUS */
 950
 951         os_free(sm->identity);
 952         eapol_auth_free(sm);
 953 }
 954
 955
 956 #ifndef CONFIG_NO_RADIUS
 957 static void ieee802_1x_decapsulate_radius(struct hostapd_data *hapd,
 958                                           struct sta_info *sta)
 959 {
 960         u8 *eap;
 961         size_t len;
 962         struct eap_hdr *hdr;
 963         int eap_type = -1;
 964         char buf[64];
 965         struct radius_msg *msg;
 966         struct eapol_state_machine *sm = sta->eapol_sm;
 967
 968         if (sm == NULL || sm->last_recv_radius == NULL) {
 969                 if (sm)
 970                         sm->eap_if->aaaEapNoReq = TRUE;
 971                 return;
 972         }
 973
 974         msg = sm->last_recv_radius;
 975
 976         eap = radius_msg_get_eap(msg, &len);
 977         if (eap == NULL) {
 978                 /* RFC 3579, Chap. 2.6.3:
 979                  * RADIUS server SHOULD NOT send Access-Reject/no EAP-Message
 980                  * attribute */
 981                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 982                                HOSTAPD_LEVEL_WARNING, "could not extract "
 983                                "EAP-Message from RADIUS message");
 984                 sm->eap_if->aaaEapNoReq = TRUE;
 985                 return;
 986         }
 987
 988         if (len < sizeof(*hdr)) {
 989                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
 990                                HOSTAPD_LEVEL_WARNING, "too short EAP packet "
 991                                "received from authentication server");
 992                 os_free(eap);
 993                 sm->eap_if->aaaEapNoReq = TRUE;
 994                 return;
 995         }
 996
 997         if (len > sizeof(*hdr))
 998                 eap_type = eap[sizeof(*hdr)];
 999
1000         hdr = (struct eap_hdr *) eap;
1001         switch (hdr->code) {
1002         case EAP_CODE_REQUEST:
1003                 if (eap_type >= 0)
1004                         sm->eap_type_authsrv = eap_type;
1005                 os_snprintf(buf, sizeof(buf), "EAP-Request-%s (%d)",
1006                             eap_type >= 0 ? eap_server_get_name(0, eap_type) :
1007                             "??",
1008                             eap_type);
1009                 break;
1010         case EAP_CODE_RESPONSE:
1011                 os_snprintf(buf, sizeof(buf), "EAP Response-%s (%d)",
1012                             eap_type >= 0 ? eap_server_get_name(0, eap_type) :
1013                             "??",
1014                             eap_type);
1015                 break;
1016         case EAP_CODE_SUCCESS:
1017                 os_strlcpy(buf, "EAP Success", sizeof(buf));
1018                 break;
1019         case EAP_CODE_FAILURE:
1020                 os_strlcpy(buf, "EAP Failure", sizeof(buf));
1021                 break;
1022         default:
1023                 os_strlcpy(buf, "unknown EAP code", sizeof(buf));
1024                 break;
1025         }
1026         buf[sizeof(buf) - 1] = '\0';
1027         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1028                        HOSTAPD_LEVEL_DEBUG, "decapsulated EAP packet (code=%d "
1029                        "id=%d len=%d) from RADIUS server: %s",
1030                        hdr->code, hdr->identifier, be_to_host16(hdr->length),
1031                        buf);
1032         sm->eap_if->aaaEapReq = TRUE;
1033
1034         wpabuf_free(sm->eap_if->aaaEapReqData);
1035         sm->eap_if->aaaEapReqData = wpabuf_alloc_ext_data(eap, len);
1036 }
1037
1038
1039 static void ieee802_1x_get_keys(struct hostapd_data *hapd,
1040                                 struct sta_info *sta, struct radius_msg *msg,
1041                                 struct radius_msg *req,
1042                                 const u8 *shared_secret,
1043                                 size_t shared_secret_len)
1044 {
1045         struct radius_ms_mppe_keys *keys;
1046         struct eapol_state_machine *sm = sta->eapol_sm;
1047         if (sm == NULL)
1048                 return;
1049
1050         keys = radius_msg_get_ms_keys(msg, req, shared_secret,
1051                                       shared_secret_len);
1052
1053         if (keys && keys->send && keys->recv) {
1054                 size_t len = keys->send_len + keys->recv_len;
1055                 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Send-Key",
1056                                 keys->send, keys->send_len);
1057                 wpa_hexdump_key(MSG_DEBUG, "MS-MPPE-Recv-Key",
1058                                 keys->recv, keys->recv_len);
1059
1060                 os_free(sm->eap_if->aaaEapKeyData);
1061                 sm->eap_if->aaaEapKeyData = os_malloc(len);
1062                 if (sm->eap_if->aaaEapKeyData) {
1063                         os_memcpy(sm->eap_if->aaaEapKeyData, keys->recv,
1064                                   keys->recv_len);
1065                         os_memcpy(sm->eap_if->aaaEapKeyData + keys->recv_len,
1066                                   keys->send, keys->send_len);
1067                         sm->eap_if->aaaEapKeyDataLen = len;
1068                         sm->eap_if->aaaEapKeyAvailable = TRUE;
1069                 }
1070         }
1071
1072         if (keys) {
1073                 os_free(keys->send);
1074                 os_free(keys->recv);
1075                 os_free(keys);
1076         }
1077 }
1078
1079
1080 static void ieee802_1x_store_radius_class(struct hostapd_data *hapd,
1081                                           struct sta_info *sta,
1082                                           struct radius_msg *msg)
1083 {
1084         u8 *class;
1085         size_t class_len;
1086         struct eapol_state_machine *sm = sta->eapol_sm;
1087         int count, i;
1088         struct radius_attr_data *nclass;
1089         size_t nclass_count;
1090
1091         if (!hapd->conf->radius->acct_server || hapd->radius == NULL ||
1092             sm == NULL)
1093                 return;
1094
1095         radius_free_class(&sm->radius_class);
1096         count = radius_msg_count_attr(msg, RADIUS_ATTR_CLASS, 1);
1097         if (count <= 0)
1098                 return;
1099
1100         nclass = os_zalloc(count * sizeof(struct radius_attr_data));
1101         if (nclass == NULL)
1102                 return;
1103
1104         nclass_count = 0;
1105
1106         class = NULL;
1107         for (i = 0; i < count; i++) {
1108                 do {
1109                         if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CLASS,
1110                                                     &class, &class_len,
1111                                                     class) < 0) {
1112                                 i = count;
1113                                 break;
1114                         }
1115                 } while (class_len < 1);
1116
1117                 nclass[nclass_count].data = os_malloc(class_len);
1118                 if (nclass[nclass_count].data == NULL)
1119                         break;
1120
1121                 os_memcpy(nclass[nclass_count].data, class, class_len);
1122                 nclass[nclass_count].len = class_len;
1123                 nclass_count++;
1124         }
1125
1126         sm->radius_class.attr = nclass;
1127         sm->radius_class.count = nclass_count;
1128         wpa_printf(MSG_DEBUG, "IEEE 802.1X: Stored %lu RADIUS Class "
1129                    "attributes for " MACSTR,
1130                    (unsigned long) sm->radius_class.count,
1131                    MAC2STR(sta->addr));
1132 }
1133
1134
1135 /* Update sta->identity based on User-Name attribute in Access-Accept */
1136 static void ieee802_1x_update_sta_identity(struct hostapd_data *hapd,
1137                                            struct sta_info *sta,
1138                                            struct radius_msg *msg)
1139 {
1140         u8 *buf, *identity;
1141         size_t len;
1142         struct eapol_state_machine *sm = sta->eapol_sm;
1143
1144         if (sm == NULL)
1145                 return;
1146
1147         if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_USER_NAME, &buf, &len,
1148                                     NULL) < 0)
1149                 return;
1150
1151         identity = os_malloc(len + 1);
1152         if (identity == NULL)
1153                 return;
1154
1155         os_memcpy(identity, buf, len);
1156         identity[len] = '\0';
1157
1158         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1159                        HOSTAPD_LEVEL_DEBUG, "old identity '%s' updated with "
1160                        "User-Name from Access-Accept '%s'",
1161                        sm->identity ? (char *) sm->identity : "N/A",
1162                        (char *) identity);
1163
1164         os_free(sm->identity);
1165         sm->identity = identity;
1166         sm->identity_len = len;
1167 }
1168
1169
1170 struct sta_id_search {
1171         u8 identifier;
1172         struct eapol_state_machine *sm;
1173 };
1174
1175
1176 static int ieee802_1x_select_radius_identifier(struct hostapd_data *hapd,
1177                                                struct sta_info *sta,
1178                                                void *ctx)
1179 {
1180         struct sta_id_search *id_search = ctx;
1181         struct eapol_state_machine *sm = sta->eapol_sm;
1182
1183         if (sm && sm->radius_identifier >= 0 &&
1184             sm->radius_identifier == id_search->identifier) {
1185                 id_search->sm = sm;
1186                 return 1;
1187         }
1188         return 0;
1189 }
1190
1191
1192 static struct eapol_state_machine *
1193 ieee802_1x_search_radius_identifier(struct hostapd_data *hapd, u8 identifier)
1194 {
1195         struct sta_id_search id_search;
1196         id_search.identifier = identifier;
1197         id_search.sm = NULL;
1198         ap_for_each_sta(hapd, ieee802_1x_select_radius_identifier, &id_search);
1199         return id_search.sm;
1200 }
1201
1202
1203 /**
1204  * ieee802_1x_receive_auth - Process RADIUS frames from Authentication Server
1205  * @msg: RADIUS response message
1206  * @req: RADIUS request message
1207  * @shared_secret: RADIUS shared secret
1208  * @shared_secret_len: Length of shared_secret in octets
1209  * @data: Context data (struct hostapd_data *)
1210  * Returns: Processing status
1211  */
1212 static RadiusRxResult
1213 ieee802_1x_receive_auth(struct radius_msg *msg, struct radius_msg *req,
1214                         const u8 *shared_secret, size_t shared_secret_len,
1215                         void *data)
1216 {
1217         struct hostapd_data *hapd = data;
1218         struct sta_info *sta;
1219         u32 session_timeout = 0, termination_action, acct_interim_interval;
1220         int session_timeout_set, old_vlanid = 0;
1221         struct eapol_state_machine *sm;
1222         int override_eapReq = 0;
1223         struct radius_hdr *hdr = radius_msg_get_hdr(msg);
1224
1225         sm = ieee802_1x_search_radius_identifier(hapd, hdr->identifier);
1226         if (sm == NULL) {
1227                 wpa_printf(MSG_DEBUG, "IEEE 802.1X: Could not find matching "
1228                            "station for this RADIUS message");
1229                 return RADIUS_RX_UNKNOWN;
1230         }
1231         sta = sm->sta;
1232
1233         /* RFC 2869, Ch. 5.13: valid Message-Authenticator attribute MUST be
1234          * present when packet contains an EAP-Message attribute */
1235         if (hdr->code == RADIUS_CODE_ACCESS_REJECT &&
1236             radius_msg_get_attr(msg, RADIUS_ATTR_MESSAGE_AUTHENTICATOR, NULL,
1237                                 0) < 0 &&
1238             radius_msg_get_attr(msg, RADIUS_ATTR_EAP_MESSAGE, NULL, 0) < 0) {
1239                 wpa_printf(MSG_DEBUG, "Allowing RADIUS Access-Reject without "
1240                            "Message-Authenticator since it does not include "
1241                            "EAP-Message");
1242         } else if (radius_msg_verify(msg, shared_secret, shared_secret_len,
1243                                      req, 1)) {
1244                 printf("Incoming RADIUS packet did not have correct "
1245                        "Message-Authenticator - dropped\n");
1246                 return RADIUS_RX_INVALID_AUTHENTICATOR;
1247         }
1248
1249         if (hdr->code != RADIUS_CODE_ACCESS_ACCEPT &&
1250             hdr->code != RADIUS_CODE_ACCESS_REJECT &&
1251             hdr->code != RADIUS_CODE_ACCESS_CHALLENGE) {
1252                 printf("Unknown RADIUS message code\n");
1253                 return RADIUS_RX_UNKNOWN;
1254         }
1255
1256         sm->radius_identifier = -1;
1257         wpa_printf(MSG_DEBUG, "RADIUS packet matching with station " MACSTR,
1258                    MAC2STR(sta->addr));
1259
1260         radius_msg_free(sm->last_recv_radius);
1261         sm->last_recv_radius = msg;
1262
1263         session_timeout_set =
1264                 !radius_msg_get_attr_int32(msg, RADIUS_ATTR_SESSION_TIMEOUT,
1265                                            &session_timeout);
1266         if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_TERMINATION_ACTION,
1267                                       &termination_action))
1268                 termination_action = RADIUS_TERMINATION_ACTION_DEFAULT;
1269
1270         if (hapd->conf->acct_interim_interval == 0 &&
1271             hdr->code == RADIUS_CODE_ACCESS_ACCEPT &&
1272             radius_msg_get_attr_int32(msg, RADIUS_ATTR_ACCT_INTERIM_INTERVAL,
1273                                       &acct_interim_interval) == 0) {
1274                 if (acct_interim_interval < 60) {
1275                         hostapd_logger(hapd, sta->addr,
1276                                        HOSTAPD_MODULE_IEEE8021X,
1277                                        HOSTAPD_LEVEL_INFO,
1278                                        "ignored too small "
1279                                        "Acct-Interim-Interval %d",
1280                                        acct_interim_interval);
1281                 } else
1282                         sta->acct_interim_interval = acct_interim_interval;
1283         }
1284
1285
1286         switch (hdr->code) {
1287         case RADIUS_CODE_ACCESS_ACCEPT:
1288                 if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
1289                         sta->vlan_id = 0;
1290 #ifndef CONFIG_NO_VLAN
1291                 else {
1292                         old_vlanid = sta->vlan_id;
1293                         sta->vlan_id = radius_msg_get_vlanid(msg);
1294                 }
1295                 if (sta->vlan_id > 0 &&
1296                     hostapd_get_vlan_id_ifname(hapd->conf->vlan,
1297                                                sta->vlan_id)) {
1298                         hostapd_logger(hapd, sta->addr,
1299                                        HOSTAPD_MODULE_RADIUS,
1300                                        HOSTAPD_LEVEL_INFO,
1301                                        "VLAN ID %d", sta->vlan_id);
1302                 } else if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_REQUIRED) {
1303                         sta->eapol_sm->authFail = TRUE;
1304                         hostapd_logger(hapd, sta->addr,
1305                                        HOSTAPD_MODULE_IEEE8021X,
1306                                        HOSTAPD_LEVEL_INFO, "authentication "
1307                                        "server did not include required VLAN "
1308                                        "ID in Access-Accept");
1309                         break;
1310                 }
1311 #endif /* CONFIG_NO_VLAN */
1312
1313                 if (ap_sta_bind_vlan(hapd, sta, old_vlanid) < 0)
1314                         break;
1315
1316                 /* RFC 3580, Ch. 3.17 */
1317                 if (session_timeout_set && termination_action ==
1318                     RADIUS_TERMINATION_ACTION_RADIUS_REQUEST) {
1319                         sm->reAuthPeriod = session_timeout;
1320                 } else if (session_timeout_set)
1321                         ap_sta_session_timeout(hapd, sta, session_timeout);
1322
1323                 sm->eap_if->aaaSuccess = TRUE;
1324                 override_eapReq = 1;
1325                 ieee802_1x_get_keys(hapd, sta, msg, req, shared_secret,
1326                                     shared_secret_len);
1327                 ieee802_1x_store_radius_class(hapd, sta, msg);
1328                 ieee802_1x_update_sta_identity(hapd, sta, msg);
1329                 if (sm->eap_if->eapKeyAvailable &&
1330                     wpa_auth_pmksa_add(sta->wpa_sm, sm->eapol_key_crypt,
1331                                        session_timeout_set ?
1332                                        (int) session_timeout : -1, sm) == 0) {
1333                         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
1334                                        HOSTAPD_LEVEL_DEBUG,
1335                                        "Added PMKSA cache entry");
1336                 }
1337                 break;
1338         case RADIUS_CODE_ACCESS_REJECT:
1339                 sm->eap_if->aaaFail = TRUE;
1340                 override_eapReq = 1;
1341                 break;
1342         case RADIUS_CODE_ACCESS_CHALLENGE:
1343                 sm->eap_if->aaaEapReq = TRUE;
1344                 if (session_timeout_set) {
1345                         /* RFC 2869, Ch. 2.3.2; RFC 3580, Ch. 3.17 */
1346                         sm->eap_if->aaaMethodTimeout = session_timeout;
1347                         hostapd_logger(hapd, sm->addr,
1348                                        HOSTAPD_MODULE_IEEE8021X,
1349                                        HOSTAPD_LEVEL_DEBUG,
1350                                        "using EAP timeout of %d seconds (from "
1351                                        "RADIUS)",
1352                                        sm->eap_if->aaaMethodTimeout);
1353                 } else {
1354                         /*
1355                          * Use dynamic retransmission behavior per EAP
1356                          * specification.
1357                          */
1358                         sm->eap_if->aaaMethodTimeout = 0;
1359                 }
1360                 break;
1361         }
1362
1363         ieee802_1x_decapsulate_radius(hapd, sta);
1364         if (override_eapReq)
1365                 sm->eap_if->aaaEapReq = FALSE;
1366
1367         eapol_auth_step(sm);
1368
1369         return RADIUS_RX_QUEUED;
1370 }
1371 #endif /* CONFIG_NO_RADIUS */
1372
1373
1374 void ieee802_1x_abort_auth(struct hostapd_data *hapd, struct sta_info *sta)
1375 {
1376         struct eapol_state_machine *sm = sta->eapol_sm;
1377         if (sm == NULL)
1378                 return;
1379
1380         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1381                        HOSTAPD_LEVEL_DEBUG, "aborting authentication");
1382
1383 #ifndef CONFIG_NO_RADIUS
1384         radius_msg_free(sm->last_recv_radius);
1385         sm->last_recv_radius = NULL;
1386 #endif /* CONFIG_NO_RADIUS */
1387
1388         if (sm->eap_if->eapTimeout) {
1389                 /*
1390                  * Disconnect the STA since it did not reply to the last EAP
1391                  * request and we cannot continue EAP processing (EAP-Failure
1392                  * could only be sent if the EAP peer actually replied).
1393                  */
1394                 sm->eap_if->portEnabled = FALSE;
1395                 ap_sta_disconnect(hapd, sta, sta->addr,
1396                                   WLAN_REASON_PREV_AUTH_NOT_VALID);
1397         }
1398 }
1399
1400
1401 static int ieee802_1x_rekey_broadcast(struct hostapd_data *hapd)
1402 {
1403         struct eapol_authenticator *eapol = hapd->eapol_auth;
1404
1405         if (hapd->conf->default_wep_key_len < 1)
1406                 return 0;
1407
1408         os_free(eapol->default_wep_key);
1409         eapol->default_wep_key = os_malloc(hapd->conf->default_wep_key_len);
1410         if (eapol->default_wep_key == NULL ||
1411             random_get_bytes(eapol->default_wep_key,
1412                              hapd->conf->default_wep_key_len)) {
1413                 printf("Could not generate random WEP key.\n");
1414                 os_free(eapol->default_wep_key);
1415                 eapol->default_wep_key = NULL;
1416                 return -1;
1417         }
1418
1419         wpa_hexdump_key(MSG_DEBUG, "IEEE 802.1X: New default WEP key",
1420                         eapol->default_wep_key,
1421                         hapd->conf->default_wep_key_len);
1422
1423         return 0;
1424 }
1425
1426
1427 static int ieee802_1x_sta_key_available(struct hostapd_data *hapd,
1428                                         struct sta_info *sta, void *ctx)
1429 {
1430         if (sta->eapol_sm) {
1431                 sta->eapol_sm->eap_if->eapKeyAvailable = TRUE;
1432                 eapol_auth_step(sta->eapol_sm);
1433         }
1434         return 0;
1435 }
1436
1437
1438 static void ieee802_1x_rekey(void *eloop_ctx, void *timeout_ctx)
1439 {
1440         struct hostapd_data *hapd = eloop_ctx;
1441         struct eapol_authenticator *eapol = hapd->eapol_auth;
1442
1443         if (eapol->default_wep_key_idx >= 3)
1444                 eapol->default_wep_key_idx =
1445                         hapd->conf->individual_wep_key_len > 0 ? 1 : 0;
1446         else
1447                 eapol->default_wep_key_idx++;
1448
1449         wpa_printf(MSG_DEBUG, "IEEE 802.1X: New default WEP key index %d",
1450                    eapol->default_wep_key_idx);
1451
1452         if (ieee802_1x_rekey_broadcast(hapd)) {
1453                 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1454                                HOSTAPD_LEVEL_WARNING, "failed to generate a "
1455                                "new broadcast key");
1456                 os_free(eapol->default_wep_key);
1457                 eapol->default_wep_key = NULL;
1458                 return;
1459         }
1460
1461         /* TODO: Could setup key for RX here, but change default TX keyid only
1462          * after new broadcast key has been sent to all stations. */
1463         if (hostapd_drv_set_key(hapd->conf->iface, hapd, WPA_ALG_WEP,
1464                                 broadcast_ether_addr,
1465                                 eapol->default_wep_key_idx, 1, NULL, 0,
1466                                 eapol->default_wep_key,
1467                                 hapd->conf->default_wep_key_len)) {
1468                 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE8021X,
1469                                HOSTAPD_LEVEL_WARNING, "failed to configure a "
1470                                "new broadcast key");
1471                 os_free(eapol->default_wep_key);
1472                 eapol->default_wep_key = NULL;
1473                 return;
1474         }
1475
1476         ap_for_each_sta(hapd, ieee802_1x_sta_key_available, NULL);
1477
1478         if (hapd->conf->wep_rekeying_period > 0) {
1479                 eloop_register_timeout(hapd->conf->wep_rekeying_period, 0,
1480                                        ieee802_1x_rekey, hapd, NULL);
1481         }
1482 }
1483
1484
1485 static void ieee802_1x_eapol_send(void *ctx, void *sta_ctx, u8 type,
1486                                   const u8 *data, size_t datalen)
1487 {
1488 #ifdef CONFIG_WPS
1489         struct sta_info *sta = sta_ctx;
1490
1491         if ((sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)) ==
1492             WLAN_STA_MAYBE_WPS) {
1493                 const u8 *identity;
1494                 size_t identity_len;
1495                 struct eapol_state_machine *sm = sta->eapol_sm;
1496
1497                 identity = eap_get_identity(sm->eap, &identity_len);
1498                 if (identity &&
1499                     ((identity_len == WSC_ID_ENROLLEE_LEN &&
1500                       os_memcmp(identity, WSC_ID_ENROLLEE,
1501                                 WSC_ID_ENROLLEE_LEN) == 0) ||
1502                      (identity_len == WSC_ID_REGISTRAR_LEN &&
1503                       os_memcmp(identity, WSC_ID_REGISTRAR,
1504                                 WSC_ID_REGISTRAR_LEN) == 0))) {
1505                         wpa_printf(MSG_DEBUG, "WPS: WLAN_STA_MAYBE_WPS -> "
1506                                    "WLAN_STA_WPS");
1507                         sta->flags |= WLAN_STA_WPS;
1508                 }
1509         }
1510 #endif /* CONFIG_WPS */
1511
1512         ieee802_1x_send(ctx, sta_ctx, type, data, datalen);
1513 }
1514
1515
1516 static void ieee802_1x_aaa_send(void *ctx, void *sta_ctx,
1517                                 const u8 *data, size_t datalen)
1518 {
1519 #ifndef CONFIG_NO_RADIUS
1520         struct hostapd_data *hapd = ctx;
1521         struct sta_info *sta = sta_ctx;
1522
1523         ieee802_1x_encapsulate_radius(hapd, sta, data, datalen);
1524 #endif /* CONFIG_NO_RADIUS */
1525 }
1526
1527
1528 static void _ieee802_1x_finished(void *ctx, void *sta_ctx, int success,
1529                                  int preauth)
1530 {
1531         struct hostapd_data *hapd = ctx;
1532         struct sta_info *sta = sta_ctx;
1533         if (preauth)
1534                 rsn_preauth_finished(hapd, sta, success);
1535         else
1536                 ieee802_1x_finished(hapd, sta, success);
1537 }
1538
1539
1540 static int ieee802_1x_get_eap_user(void *ctx, const u8 *identity,
1541                                    size_t identity_len, int phase2,
1542                                    struct eap_user *user)
1543 {
1544         struct hostapd_data *hapd = ctx;
1545         const struct hostapd_eap_user *eap_user;
1546         int i, count;
1547
1548         eap_user = hostapd_get_eap_user(hapd->conf, identity,
1549                                         identity_len, phase2);
1550         if (eap_user == NULL)
1551                 return -1;
1552
1553         os_memset(user, 0, sizeof(*user));
1554         user->phase2 = phase2;
1555         count = EAP_USER_MAX_METHODS;
1556         if (count > EAP_MAX_METHODS)
1557                 count = EAP_MAX_METHODS;
1558         for (i = 0; i < count; i++) {
1559                 user->methods[i].vendor = eap_user->methods[i].vendor;
1560                 user->methods[i].method = eap_user->methods[i].method;
1561         }
1562
1563         if (eap_user->password) {
1564                 user->password = os_malloc(eap_user->password_len);
1565                 if (user->password == NULL)
1566                         return -1;
1567                 os_memcpy(user->password, eap_user->password,
1568                           eap_user->password_len);
1569                 user->password_len = eap_user->password_len;
1570         }
1571         user->force_version = eap_user->force_version;
1572         user->ttls_auth = eap_user->ttls_auth;
1573
1574         return 0;
1575 }
1576
1577
1578 static int ieee802_1x_sta_entry_alive(void *ctx, const u8 *addr)
1579 {
1580         struct hostapd_data *hapd = ctx;
1581         struct sta_info *sta;
1582         sta = ap_get_sta(hapd, addr);
1583         if (sta == NULL || sta->eapol_sm == NULL)
1584                 return 0;
1585         return 1;
1586 }
1587
1588
1589 static void ieee802_1x_logger(void *ctx, const u8 *addr,
1590                               eapol_logger_level level, const char *txt)
1591 {
1592 #ifndef CONFIG_NO_HOSTAPD_LOGGER
1593         struct hostapd_data *hapd = ctx;
1594         int hlevel;
1595
1596         switch (level) {
1597         case EAPOL_LOGGER_WARNING:
1598                 hlevel = HOSTAPD_LEVEL_WARNING;
1599                 break;
1600         case EAPOL_LOGGER_INFO:
1601                 hlevel = HOSTAPD_LEVEL_INFO;
1602                 break;
1603         case EAPOL_LOGGER_DEBUG:
1604         default:
1605                 hlevel = HOSTAPD_LEVEL_DEBUG;
1606                 break;
1607         }
1608
1609         hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE8021X, hlevel, "%s",
1610                        txt);
1611 #endif /* CONFIG_NO_HOSTAPD_LOGGER */
1612 }
1613
1614
1615 static void ieee802_1x_set_port_authorized(void *ctx, void *sta_ctx,
1616                                            int authorized)
1617 {
1618         struct hostapd_data *hapd = ctx;
1619         struct sta_info *sta = sta_ctx;
1620         ieee802_1x_set_sta_authorized(hapd, sta, authorized);
1621 }
1622
1623
1624 static void _ieee802_1x_abort_auth(void *ctx, void *sta_ctx)
1625 {
1626         struct hostapd_data *hapd = ctx;
1627         struct sta_info *sta = sta_ctx;
1628         ieee802_1x_abort_auth(hapd, sta);
1629 }
1630
1631
1632 static void _ieee802_1x_tx_key(void *ctx, void *sta_ctx)
1633 {
1634         struct hostapd_data *hapd = ctx;
1635         struct sta_info *sta = sta_ctx;
1636         ieee802_1x_tx_key(hapd, sta);
1637 }
1638
1639
1640 static void ieee802_1x_eapol_event(void *ctx, void *sta_ctx,
1641                                    enum eapol_event type)
1642 {
1643         /* struct hostapd_data *hapd = ctx; */
1644         struct sta_info *sta = sta_ctx;
1645         switch (type) {
1646         case EAPOL_AUTH_SM_CHANGE:
1647                 wpa_auth_sm_notify(sta->wpa_sm);
1648                 break;
1649         case EAPOL_AUTH_REAUTHENTICATE:
1650                 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH_EAPOL);
1651                 break;
1652         }
1653 }
1654
1655
1656 int ieee802_1x_init(struct hostapd_data *hapd)
1657 {
1658         int i;
1659         struct eapol_auth_config conf;
1660         struct eapol_auth_cb cb;
1661
1662         os_memset(&conf, 0, sizeof(conf));
1663         conf.ctx = hapd;
1664         conf.eap_reauth_period = hapd->conf->eap_reauth_period;
1665         conf.wpa = hapd->conf->wpa;
1666         conf.individual_wep_key_len = hapd->conf->individual_wep_key_len;
1667         conf.eap_server = hapd->conf->eap_server;
1668         conf.ssl_ctx = hapd->ssl_ctx;
1669         conf.msg_ctx = hapd->msg_ctx;
1670         conf.eap_sim_db_priv = hapd->eap_sim_db_priv;
1671         conf.eap_req_id_text = hapd->conf->eap_req_id_text;
1672         conf.eap_req_id_text_len = hapd->conf->eap_req_id_text_len;
1673         conf.pac_opaque_encr_key = hapd->conf->pac_opaque_encr_key;
1674         conf.eap_fast_a_id = hapd->conf->eap_fast_a_id;
1675         conf.eap_fast_a_id_len = hapd->conf->eap_fast_a_id_len;
1676         conf.eap_fast_a_id_info = hapd->conf->eap_fast_a_id_info;
1677         conf.eap_fast_prov = hapd->conf->eap_fast_prov;
1678         conf.pac_key_lifetime = hapd->conf->pac_key_lifetime;
1679         conf.pac_key_refresh_time = hapd->conf->pac_key_refresh_time;
1680         conf.eap_sim_aka_result_ind = hapd->conf->eap_sim_aka_result_ind;
1681         conf.tnc = hapd->conf->tnc;
1682         conf.wps = hapd->wps;
1683         conf.fragment_size = hapd->conf->fragment_size;
1684         conf.pwd_group = hapd->conf->pwd_group;
1685
1686         os_memset(&cb, 0, sizeof(cb));
1687         cb.eapol_send = ieee802_1x_eapol_send;
1688         cb.aaa_send = ieee802_1x_aaa_send;
1689         cb.finished = _ieee802_1x_finished;
1690         cb.get_eap_user = ieee802_1x_get_eap_user;
1691         cb.sta_entry_alive = ieee802_1x_sta_entry_alive;
1692         cb.logger = ieee802_1x_logger;
1693         cb.set_port_authorized = ieee802_1x_set_port_authorized;
1694         cb.abort_auth = _ieee802_1x_abort_auth;
1695         cb.tx_key = _ieee802_1x_tx_key;
1696         cb.eapol_event = ieee802_1x_eapol_event;
1697
1698         hapd->eapol_auth = eapol_auth_init(&conf, &cb);
1699         if (hapd->eapol_auth == NULL)
1700                 return -1;
1701
1702         if ((hapd->conf->ieee802_1x || hapd->conf->wpa) &&
1703             hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 1))
1704                 return -1;
1705
1706 #ifndef CONFIG_NO_RADIUS
1707         if (radius_client_register(hapd->radius, RADIUS_AUTH,
1708                                    ieee802_1x_receive_auth, hapd))
1709                 return -1;
1710 #endif /* CONFIG_NO_RADIUS */
1711
1712         if (hapd->conf->default_wep_key_len) {
1713                 for (i = 0; i < 4; i++)
1714                         hostapd_drv_set_key(hapd->conf->iface, hapd,
1715                                             WPA_ALG_NONE, NULL, i, 0, NULL, 0,
1716                                             NULL, 0);
1717
1718                 ieee802_1x_rekey(hapd, NULL);
1719
1720                 if (hapd->eapol_auth->default_wep_key == NULL)
1721                         return -1;
1722         }
1723
1724         return 0;
1725 }
1726
1727
1728 void ieee802_1x_deinit(struct hostapd_data *hapd)
1729 {
1730         eloop_cancel_timeout(ieee802_1x_rekey, hapd, NULL);
1731
1732         if (hapd->driver != NULL &&
1733             (hapd->conf->ieee802_1x || hapd->conf->wpa))
1734                 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0);
1735
1736         eapol_auth_deinit(hapd->eapol_auth);
1737         hapd->eapol_auth = NULL;
1738 }
1739
1740
1741 int ieee802_1x_tx_status(struct hostapd_data *hapd, struct sta_info *sta,
1742                          const u8 *buf, size_t len, int ack)
1743 {
1744         struct ieee80211_hdr *hdr;
1745         struct ieee802_1x_hdr *xhdr;
1746         struct ieee802_1x_eapol_key *key;
1747         u8 *pos;
1748         const unsigned char rfc1042_hdr[ETH_ALEN] =
1749                 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
1750
1751         if (sta == NULL)
1752                 return -1;
1753         if (len < sizeof(*hdr) + sizeof(rfc1042_hdr) + 2 + sizeof(*xhdr))
1754                 return 0;
1755
1756         hdr = (struct ieee80211_hdr *) buf;
1757         pos = (u8 *) (hdr + 1);
1758         if (os_memcmp(pos, rfc1042_hdr, sizeof(rfc1042_hdr)) != 0)
1759                 return 0;
1760         pos += sizeof(rfc1042_hdr);
1761         if (WPA_GET_BE16(pos) != ETH_P_PAE)
1762                 return 0;
1763         pos += 2;
1764
1765         xhdr = (struct ieee802_1x_hdr *) pos;
1766         pos += sizeof(*xhdr);
1767
1768         wpa_printf(MSG_DEBUG, "IEEE 802.1X: " MACSTR " TX status - version=%d "
1769                    "type=%d length=%d - ack=%d",
1770                    MAC2STR(sta->addr), xhdr->version, xhdr->type,
1771                    be_to_host16(xhdr->length), ack);
1772
1773         if (xhdr->type == IEEE802_1X_TYPE_EAPOL_KEY &&
1774             pos + sizeof(struct wpa_eapol_key) <= buf + len) {
1775                 const struct wpa_eapol_key *wpa;
1776                 wpa = (const struct wpa_eapol_key *) pos;
1777                 if (wpa->type == EAPOL_KEY_TYPE_RSN ||
1778                     wpa->type == EAPOL_KEY_TYPE_WPA)
1779                         wpa_auth_eapol_key_tx_status(hapd->wpa_auth,
1780                                                      sta->wpa_sm, ack);
1781         }
1782
1783         /* EAPOL EAP-Packet packets are eventually re-sent by either Supplicant
1784          * or Authenticator state machines, but EAPOL-Key packets are not
1785          * retransmitted in case of failure. Try to re-sent failed EAPOL-Key
1786          * packets couple of times because otherwise STA keys become
1787          * unsynchronized with AP. */
1788         if (xhdr->type == IEEE802_1X_TYPE_EAPOL_KEY && !ack &&
1789             pos + sizeof(*key) <= buf + len) {
1790                 key = (struct ieee802_1x_eapol_key *) pos;
1791                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE8021X,
1792                                HOSTAPD_LEVEL_DEBUG, "did not Ack EAPOL-Key "
1793                                "frame (%scast index=%d)",
1794                                key->key_index & BIT(7) ? "uni" : "broad",
1795                                key->key_index & ~BIT(7));
1796                 /* TODO: re-send EAPOL-Key couple of times (with short delay
1797                  * between them?). If all attempt fail, report error and
1798                  * deauthenticate STA so that it will get new keys when
1799                  * authenticating again (e.g., after returning in range).
1800                  * Separate limit/transmit state needed both for unicast and
1801                  * broadcast keys(?) */
1802         }
1803         /* TODO: could move unicast key configuration from ieee802_1x_tx_key()
1804          * to here and change the key only if the EAPOL-Key packet was Acked.
1805          */
1806
1807         return 1;
1808 }
1809
1810
1811 u8 * ieee802_1x_get_identity(struct eapol_state_machine *sm, size_t *len)
1812 {
1813         if (sm == NULL || sm->identity == NULL)
1814                 return NULL;
1815
1816         *len = sm->identity_len;
1817         return sm->identity;
1818 }
1819
1820
1821 u8 * ieee802_1x_get_radius_class(struct eapol_state_machine *sm, size_t *len,
1822                                  int idx)
1823 {
1824         if (sm == NULL || sm->radius_class.attr == NULL ||
1825             idx >= (int) sm->radius_class.count)
1826                 return NULL;
1827
1828         *len = sm->radius_class.attr[idx].len;
1829         return sm->radius_class.attr[idx].data;
1830 }
1831
1832
1833 const u8 * ieee802_1x_get_key(struct eapol_state_machine *sm, size_t *len)
1834 {
1835         if (sm == NULL)
1836                 return NULL;
1837
1838         *len = sm->eap_if->eapKeyDataLen;
1839         return sm->eap_if->eapKeyData;
1840 }
1841
1842
1843 void ieee802_1x_notify_port_enabled(struct eapol_state_machine *sm,
1844                                     int enabled)
1845 {
1846         if (sm == NULL)
1847                 return;
1848         sm->eap_if->portEnabled = enabled ? TRUE : FALSE;
1849         eapol_auth_step(sm);
1850 }
1851
1852
1853 void ieee802_1x_notify_port_valid(struct eapol_state_machine *sm,
1854                                   int valid)
1855 {
1856         if (sm == NULL)
1857                 return;
1858         sm->portValid = valid ? TRUE : FALSE;
1859         eapol_auth_step(sm);
1860 }
1861
1862
1863 void ieee802_1x_notify_pre_auth(struct eapol_state_machine *sm, int pre_auth)
1864 {
1865         if (sm == NULL)
1866                 return;
1867         if (pre_auth)
1868                 sm->flags |= EAPOL_SM_PREAUTH;
1869         else
1870                 sm->flags &= ~EAPOL_SM_PREAUTH;
1871 }
1872
1873
1874 static const char * bool_txt(Boolean bool)
1875 {
1876         return bool ? "TRUE" : "FALSE";
1877 }
1878
1879
1880 int ieee802_1x_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
1881 {
1882         /* TODO */
1883         return 0;
1884 }
1885
1886
1887 int ieee802_1x_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
1888                            char *buf, size_t buflen)
1889 {
1890         int len = 0, ret;
1891         struct eapol_state_machine *sm = sta->eapol_sm;
1892
1893         if (sm == NULL)
1894                 return 0;
1895
1896         ret = os_snprintf(buf + len, buflen - len,
1897                           "dot1xPaePortNumber=%d\n"
1898                           "dot1xPaePortProtocolVersion=%d\n"
1899                           "dot1xPaePortCapabilities=1\n"
1900                           "dot1xPaePortInitialize=%d\n"
1901                           "dot1xPaePortReauthenticate=FALSE\n",
1902                           sta->aid,
1903                           EAPOL_VERSION,
1904                           sm->initialize);
1905         if (ret < 0 || (size_t) ret >= buflen - len)
1906                 return len;
1907         len += ret;
1908
1909         /* dot1xAuthConfigTable */
1910         ret = os_snprintf(buf + len, buflen - len,
1911                           "dot1xAuthPaeState=%d\n"
1912                           "dot1xAuthBackendAuthState=%d\n"
1913                           "dot1xAuthAdminControlledDirections=%d\n"
1914                           "dot1xAuthOperControlledDirections=%d\n"
1915                           "dot1xAuthAuthControlledPortStatus=%d\n"
1916                           "dot1xAuthAuthControlledPortControl=%d\n"
1917                           "dot1xAuthQuietPeriod=%u\n"
1918                           "dot1xAuthServerTimeout=%u\n"
1919                           "dot1xAuthReAuthPeriod=%u\n"
1920                           "dot1xAuthReAuthEnabled=%s\n"
1921                           "dot1xAuthKeyTxEnabled=%s\n",
1922                           sm->auth_pae_state + 1,
1923                           sm->be_auth_state + 1,
1924                           sm->adminControlledDirections,
1925                           sm->operControlledDirections,
1926                           sm->authPortStatus,
1927                           sm->portControl,
1928                           sm->quietPeriod,
1929                           sm->serverTimeout,
1930                           sm->reAuthPeriod,
1931                           bool_txt(sm->reAuthEnabled),
1932                           bool_txt(sm->keyTxEnabled));
1933         if (ret < 0 || (size_t) ret >= buflen - len)
1934                 return len;
1935         len += ret;
1936
1937         /* dot1xAuthStatsTable */
1938         ret = os_snprintf(buf + len, buflen - len,
1939                           "dot1xAuthEapolFramesRx=%u\n"
1940                           "dot1xAuthEapolFramesTx=%u\n"
1941                           "dot1xAuthEapolStartFramesRx=%u\n"
1942                           "dot1xAuthEapolLogoffFramesRx=%u\n"
1943                           "dot1xAuthEapolRespIdFramesRx=%u\n"
1944                           "dot1xAuthEapolRespFramesRx=%u\n"
1945                           "dot1xAuthEapolReqIdFramesTx=%u\n"
1946                           "dot1xAuthEapolReqFramesTx=%u\n"
1947                           "dot1xAuthInvalidEapolFramesRx=%u\n"
1948                           "dot1xAuthEapLengthErrorFramesRx=%u\n"
1949                           "dot1xAuthLastEapolFrameVersion=%u\n"
1950                           "dot1xAuthLastEapolFrameSource=" MACSTR "\n",
1951                           sm->dot1xAuthEapolFramesRx,
1952                           sm->dot1xAuthEapolFramesTx,
1953                           sm->dot1xAuthEapolStartFramesRx,
1954                           sm->dot1xAuthEapolLogoffFramesRx,
1955                           sm->dot1xAuthEapolRespIdFramesRx,
1956                           sm->dot1xAuthEapolRespFramesRx,
1957                           sm->dot1xAuthEapolReqIdFramesTx,
1958                           sm->dot1xAuthEapolReqFramesTx,
1959                           sm->dot1xAuthInvalidEapolFramesRx,
1960                           sm->dot1xAuthEapLengthErrorFramesRx,
1961                           sm->dot1xAuthLastEapolFrameVersion,
1962                           MAC2STR(sm->addr));
1963         if (ret < 0 || (size_t) ret >= buflen - len)
1964                 return len;
1965         len += ret;
1966
1967         /* dot1xAuthDiagTable */
1968         ret = os_snprintf(buf + len, buflen - len,
1969                           "dot1xAuthEntersConnecting=%u\n"
1970                           "dot1xAuthEapLogoffsWhileConnecting=%u\n"
1971                           "dot1xAuthEntersAuthenticating=%u\n"
1972                           "dot1xAuthAuthSuccessesWhileAuthenticating=%u\n"
1973                           "dot1xAuthAuthTimeoutsWhileAuthenticating=%u\n"
1974                           "dot1xAuthAuthFailWhileAuthenticating=%u\n"
1975                           "dot1xAuthAuthEapStartsWhileAuthenticating=%u\n"
1976                           "dot1xAuthAuthEapLogoffWhileAuthenticating=%u\n"
1977                           "dot1xAuthAuthReauthsWhileAuthenticated=%u\n"
1978                           "dot1xAuthAuthEapStartsWhileAuthenticated=%u\n"
1979                           "dot1xAuthAuthEapLogoffWhileAuthenticated=%u\n"
1980                           "dot1xAuthBackendResponses=%u\n"
1981                           "dot1xAuthBackendAccessChallenges=%u\n"
1982                           "dot1xAuthBackendOtherRequestsToSupplicant=%u\n"
1983                           "dot1xAuthBackendAuthSuccesses=%u\n"
1984                           "dot1xAuthBackendAuthFails=%u\n",
1985                           sm->authEntersConnecting,
1986                           sm->authEapLogoffsWhileConnecting,
1987                           sm->authEntersAuthenticating,
1988                           sm->authAuthSuccessesWhileAuthenticating,
1989                           sm->authAuthTimeoutsWhileAuthenticating,
1990                           sm->authAuthFailWhileAuthenticating,
1991                           sm->authAuthEapStartsWhileAuthenticating,
1992                           sm->authAuthEapLogoffWhileAuthenticating,
1993                           sm->authAuthReauthsWhileAuthenticated,
1994                           sm->authAuthEapStartsWhileAuthenticated,
1995                           sm->authAuthEapLogoffWhileAuthenticated,
1996                           sm->backendResponses,
1997                           sm->backendAccessChallenges,
1998                           sm->backendOtherRequestsToSupplicant,
1999                           sm->backendAuthSuccesses,
2000                           sm->backendAuthFails);
2001         if (ret < 0 || (size_t) ret >= buflen - len)
2002                 return len;
2003         len += ret;
2004
2005         /* dot1xAuthSessionStatsTable */
2006         ret = os_snprintf(buf + len, buflen - len,
2007                           /* TODO: dot1xAuthSessionOctetsRx */
2008                           /* TODO: dot1xAuthSessionOctetsTx */
2009                           /* TODO: dot1xAuthSessionFramesRx */
2010                           /* TODO: dot1xAuthSessionFramesTx */
2011                           "dot1xAuthSessionId=%08X-%08X\n"
2012                           "dot1xAuthSessionAuthenticMethod=%d\n"
2013                           "dot1xAuthSessionTime=%u\n"
2014                           "dot1xAuthSessionTerminateCause=999\n"
2015                           "dot1xAuthSessionUserName=%s\n",
2016                           sta->acct_session_id_hi, sta->acct_session_id_lo,
2017                           (wpa_key_mgmt_wpa_ieee8021x(
2018                                    wpa_auth_sta_key_mgmt(sta->wpa_sm))) ?
2019                           1 : 2,
2020                           (unsigned int) (time(NULL) -
2021                                           sta->acct_session_start),
2022                           sm->identity);
2023         if (ret < 0 || (size_t) ret >= buflen - len)
2024                 return len;
2025         len += ret;
2026
2027         return len;
2028 }
2029
2030
2031 static void ieee802_1x_finished(struct hostapd_data *hapd,
2032                                 struct sta_info *sta, int success)
2033 {
2034         const u8 *key;
2035         size_t len;
2036         /* TODO: get PMKLifetime from WPA parameters */
2037         static const int dot11RSNAConfigPMKLifetime = 43200;
2038
2039         key = ieee802_1x_get_key(sta->eapol_sm, &len);
2040         if (success && key && len >= PMK_LEN &&
2041             wpa_auth_pmksa_add(sta->wpa_sm, key, dot11RSNAConfigPMKLifetime,
2042                                sta->eapol_sm) == 0) {
2043                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_WPA,
2044                                HOSTAPD_LEVEL_DEBUG,
2045                                "Added PMKSA cache entry (IEEE 802.1X)");
2046         }
2047
2048 #ifdef CONFIG_WPS
2049         if (!success && (sta->flags & WLAN_STA_WPS)) {
2050                 /*
2051                  * Many devices require deauthentication after WPS provisioning
2052                  * and some may not be be able to do that themselves, so
2053                  * disconnect the client here.
2054                  */
2055                 wpa_printf(MSG_DEBUG, "WPS: Force disconnection after "
2056                            "EAP-Failure");
2057                 /* Add a small sleep to increase likelihood of previously
2058                  * requested EAP-Failure TX getting out before this should the
2059                  * driver reorder operations.
2060                  */
2061                 os_sleep(0, 10000);
2062                 ap_sta_disconnect(hapd, sta, sta->addr,
2063                                   WLAN_REASON_PREV_AUTH_NOT_VALID);
2064         }
2065 #endif /* CONFIG_WPS */
2066 }