www.project-moonshot.org Git - mech_eap.orig/blob - src/rsn_supp/wpa_ie.c

   1 /*
   2  * wpa_supplicant - WPA/RSN IE and KDE processing
   3  * Copyright (c) 2003-2008, 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 "common.h"
  18 #include "wpa.h"
  19 #include "pmksa_cache.h"
  20 #include "common/ieee802_11_defs.h"
  21 #include "wpa_i.h"
  22 #include "wpa_ie.h"
  23
  24
  25 static int wpa_selector_to_bitfield(const u8 *s)
  26 {
  27         if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_NONE)
  28                 return WPA_CIPHER_NONE;
  29         if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_WEP40)
  30                 return WPA_CIPHER_WEP40;
  31         if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_TKIP)
  32                 return WPA_CIPHER_TKIP;
  33         if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_CCMP)
  34                 return WPA_CIPHER_CCMP;
  35         if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_WEP104)
  36                 return WPA_CIPHER_WEP104;
  37         return 0;
  38 }
  39
  40
  41 static int wpa_key_mgmt_to_bitfield(const u8 *s)
  42 {
  43         if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_UNSPEC_802_1X)
  44                 return WPA_KEY_MGMT_IEEE8021X;
  45         if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X)
  46                 return WPA_KEY_MGMT_PSK;
  47         if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_NONE)
  48                 return WPA_KEY_MGMT_WPA_NONE;
  49         return 0;
  50 }
  51
  52
  53 static int wpa_parse_wpa_ie_wpa(const u8 *wpa_ie, size_t wpa_ie_len,
  54                                 struct wpa_ie_data *data)
  55 {
  56         const struct wpa_ie_hdr *hdr;
  57         const u8 *pos;
  58         int left;
  59         int i, count;
  60
  61         os_memset(data, 0, sizeof(*data));
  62         data->proto = WPA_PROTO_WPA;
  63         data->pairwise_cipher = WPA_CIPHER_TKIP;
  64         data->group_cipher = WPA_CIPHER_TKIP;
  65         data->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
  66         data->capabilities = 0;
  67         data->pmkid = NULL;
  68         data->num_pmkid = 0;
  69         data->mgmt_group_cipher = 0;
  70
  71         if (wpa_ie_len == 0) {
  72                 /* No WPA IE - fail silently */
  73                 return -1;
  74         }
  75
  76         if (wpa_ie_len < sizeof(struct wpa_ie_hdr)) {
  77                 wpa_printf(MSG_DEBUG, "%s: ie len too short %lu",
  78                            __func__, (unsigned long) wpa_ie_len);
  79                 return -1;
  80         }
  81
  82         hdr = (const struct wpa_ie_hdr *) wpa_ie;
  83
  84         if (hdr->elem_id != WLAN_EID_VENDOR_SPECIFIC ||
  85             hdr->len != wpa_ie_len - 2 ||
  86             RSN_SELECTOR_GET(hdr->oui) != WPA_OUI_TYPE ||
  87             WPA_GET_LE16(hdr->version) != WPA_VERSION) {
  88                 wpa_printf(MSG_DEBUG, "%s: malformed ie or unknown version",
  89                            __func__);
  90                 return -1;
  91         }
  92
  93         pos = (const u8 *) (hdr + 1);
  94         left = wpa_ie_len - sizeof(*hdr);
  95
  96         if (left >= WPA_SELECTOR_LEN) {
  97                 data->group_cipher = wpa_selector_to_bitfield(pos);
  98                 pos += WPA_SELECTOR_LEN;
  99                 left -= WPA_SELECTOR_LEN;
 100         } else if (left > 0) {
 101                 wpa_printf(MSG_DEBUG, "%s: ie length mismatch, %u too much",
 102                            __func__, left);
 103                 return -1;
 104         }
 105
 106         if (left >= 2) {
 107                 data->pairwise_cipher = 0;
 108                 count = WPA_GET_LE16(pos);
 109                 pos += 2;
 110                 left -= 2;
 111                 if (count == 0 || left < count * WPA_SELECTOR_LEN) {
 112                         wpa_printf(MSG_DEBUG, "%s: ie count botch (pairwise), "
 113                                    "count %u left %u", __func__, count, left);
 114                         return -1;
 115                 }
 116                 for (i = 0; i < count; i++) {
 117                         data->pairwise_cipher |= wpa_selector_to_bitfield(pos);
 118                         pos += WPA_SELECTOR_LEN;
 119                         left -= WPA_SELECTOR_LEN;
 120                 }
 121         } else if (left == 1) {
 122                 wpa_printf(MSG_DEBUG, "%s: ie too short (for key mgmt)",
 123                            __func__);
 124                 return -1;
 125         }
 126
 127         if (left >= 2) {
 128                 data->key_mgmt = 0;
 129                 count = WPA_GET_LE16(pos);
 130                 pos += 2;
 131                 left -= 2;
 132                 if (count == 0 || left < count * WPA_SELECTOR_LEN) {
 133                         wpa_printf(MSG_DEBUG, "%s: ie count botch (key mgmt), "
 134                                    "count %u left %u", __func__, count, left);
 135                         return -1;
 136                 }
 137                 for (i = 0; i < count; i++) {
 138                         data->key_mgmt |= wpa_key_mgmt_to_bitfield(pos);
 139                         pos += WPA_SELECTOR_LEN;
 140                         left -= WPA_SELECTOR_LEN;
 141                 }
 142         } else if (left == 1) {
 143                 wpa_printf(MSG_DEBUG, "%s: ie too short (for capabilities)",
 144                            __func__);
 145                 return -1;
 146         }
 147
 148         if (left >= 2) {
 149                 data->capabilities = WPA_GET_LE16(pos);
 150                 pos += 2;
 151                 left -= 2;
 152         }
 153
 154         if (left > 0) {
 155                 wpa_printf(MSG_DEBUG, "%s: ie has %u trailing bytes - ignored",
 156                            __func__, left);
 157         }
 158
 159         return 0;
 160 }
 161
 162
 163 /**
 164  * wpa_parse_wpa_ie - Parse WPA/RSN IE
 165  * @wpa_ie: Pointer to WPA or RSN IE
 166  * @wpa_ie_len: Length of the WPA/RSN IE
 167  * @data: Pointer to data area for parsing results
 168  * Returns: 0 on success, -1 on failure
 169  *
 170  * Parse the contents of WPA or RSN IE and write the parsed data into data.
 171  */
 172 int wpa_parse_wpa_ie(const u8 *wpa_ie, size_t wpa_ie_len,
 173                      struct wpa_ie_data *data)
 174 {
 175         if (wpa_ie_len >= 1 && wpa_ie[0] == WLAN_EID_RSN)
 176                 return wpa_parse_wpa_ie_rsn(wpa_ie, wpa_ie_len, data);
 177         else
 178                 return wpa_parse_wpa_ie_wpa(wpa_ie, wpa_ie_len, data);
 179 }
 180
 181
 182 static int wpa_gen_wpa_ie_wpa(u8 *wpa_ie, size_t wpa_ie_len,
 183                               int pairwise_cipher, int group_cipher,
 184                               int key_mgmt)
 185 {
 186         u8 *pos;
 187         struct wpa_ie_hdr *hdr;
 188
 189         if (wpa_ie_len < sizeof(*hdr) + WPA_SELECTOR_LEN +
 190             2 + WPA_SELECTOR_LEN + 2 + WPA_SELECTOR_LEN)
 191                 return -1;
 192
 193         hdr = (struct wpa_ie_hdr *) wpa_ie;
 194         hdr->elem_id = WLAN_EID_VENDOR_SPECIFIC;
 195         RSN_SELECTOR_PUT(hdr->oui, WPA_OUI_TYPE);
 196         WPA_PUT_LE16(hdr->version, WPA_VERSION);
 197         pos = (u8 *) (hdr + 1);
 198
 199         if (group_cipher == WPA_CIPHER_CCMP) {
 200                 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_CCMP);
 201         } else if (group_cipher == WPA_CIPHER_TKIP) {
 202                 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_TKIP);
 203         } else if (group_cipher == WPA_CIPHER_WEP104) {
 204                 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_WEP104);
 205         } else if (group_cipher == WPA_CIPHER_WEP40) {
 206                 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_WEP40);
 207         } else {
 208                 wpa_printf(MSG_WARNING, "Invalid group cipher (%d).",
 209                            group_cipher);
 210                 return -1;
 211         }
 212         pos += WPA_SELECTOR_LEN;
 213
 214         *pos++ = 1;
 215         *pos++ = 0;
 216         if (pairwise_cipher == WPA_CIPHER_CCMP) {
 217                 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_CCMP);
 218         } else if (pairwise_cipher == WPA_CIPHER_TKIP) {
 219                 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_TKIP);
 220         } else if (pairwise_cipher == WPA_CIPHER_NONE) {
 221                 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_NONE);
 222         } else {
 223                 wpa_printf(MSG_WARNING, "Invalid pairwise cipher (%d).",
 224                            pairwise_cipher);
 225                 return -1;
 226         }
 227         pos += WPA_SELECTOR_LEN;
 228
 229         *pos++ = 1;
 230         *pos++ = 0;
 231         if (key_mgmt == WPA_KEY_MGMT_IEEE8021X) {
 232                 RSN_SELECTOR_PUT(pos, WPA_AUTH_KEY_MGMT_UNSPEC_802_1X);
 233         } else if (key_mgmt == WPA_KEY_MGMT_PSK) {
 234                 RSN_SELECTOR_PUT(pos, WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X);
 235         } else if (key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
 236                 RSN_SELECTOR_PUT(pos, WPA_AUTH_KEY_MGMT_NONE);
 237         } else {
 238                 wpa_printf(MSG_WARNING, "Invalid key management type (%d).",
 239                            key_mgmt);
 240                 return -1;
 241         }
 242         pos += WPA_SELECTOR_LEN;
 243
 244         /* WPA Capabilities; use defaults, so no need to include it */
 245
 246         hdr->len = (pos - wpa_ie) - 2;
 247
 248         WPA_ASSERT((size_t) (pos - wpa_ie) <= wpa_ie_len);
 249
 250         return pos - wpa_ie;
 251 }
 252
 253
 254 static int wpa_gen_wpa_ie_rsn(u8 *rsn_ie, size_t rsn_ie_len,
 255                               int pairwise_cipher, int group_cipher,
 256                               int key_mgmt, int mgmt_group_cipher,
 257                               struct wpa_sm *sm)
 258 {
 259 #ifndef CONFIG_NO_WPA2
 260         u8 *pos;
 261         struct rsn_ie_hdr *hdr;
 262         u16 capab;
 263
 264         if (rsn_ie_len < sizeof(*hdr) + RSN_SELECTOR_LEN +
 265             2 + RSN_SELECTOR_LEN + 2 + RSN_SELECTOR_LEN + 2 +
 266             (sm->cur_pmksa ? 2 + PMKID_LEN : 0)) {
 267                 wpa_printf(MSG_DEBUG, "RSN: Too short IE buffer (%lu bytes)",
 268                            (unsigned long) rsn_ie_len);
 269                 return -1;
 270         }
 271
 272         hdr = (struct rsn_ie_hdr *) rsn_ie;
 273         hdr->elem_id = WLAN_EID_RSN;
 274         WPA_PUT_LE16(hdr->version, RSN_VERSION);
 275         pos = (u8 *) (hdr + 1);
 276
 277         if (group_cipher == WPA_CIPHER_CCMP) {
 278                 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP);
 279         } else if (group_cipher == WPA_CIPHER_TKIP) {
 280                 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_TKIP);
 281         } else if (group_cipher == WPA_CIPHER_WEP104) {
 282                 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_WEP104);
 283         } else if (group_cipher == WPA_CIPHER_WEP40) {
 284                 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_WEP40);
 285         } else {
 286                 wpa_printf(MSG_WARNING, "Invalid group cipher (%d).",
 287                            group_cipher);
 288                 return -1;
 289         }
 290         pos += RSN_SELECTOR_LEN;
 291
 292         *pos++ = 1;
 293         *pos++ = 0;
 294         if (pairwise_cipher == WPA_CIPHER_CCMP) {
 295                 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP);
 296         } else if (pairwise_cipher == WPA_CIPHER_TKIP) {
 297                 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_TKIP);
 298         } else if (pairwise_cipher == WPA_CIPHER_NONE) {
 299                 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_NONE);
 300         } else {
 301                 wpa_printf(MSG_WARNING, "Invalid pairwise cipher (%d).",
 302                            pairwise_cipher);
 303                 return -1;
 304         }
 305         pos += RSN_SELECTOR_LEN;
 306
 307         *pos++ = 1;
 308         *pos++ = 0;
 309         if (key_mgmt == WPA_KEY_MGMT_IEEE8021X) {
 310                 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_UNSPEC_802_1X);
 311         } else if (key_mgmt == WPA_KEY_MGMT_PSK) {
 312                 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X);
 313 #ifdef CONFIG_IEEE80211R
 314         } else if (key_mgmt == WPA_KEY_MGMT_FT_IEEE8021X) {
 315                 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_802_1X);
 316         } else if (key_mgmt == WPA_KEY_MGMT_FT_PSK) {
 317                 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_PSK);
 318 #endif /* CONFIG_IEEE80211R */
 319 #ifdef CONFIG_IEEE80211W
 320         } else if (key_mgmt == WPA_KEY_MGMT_IEEE8021X_SHA256) {
 321                 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_802_1X_SHA256);
 322         } else if (key_mgmt == WPA_KEY_MGMT_PSK_SHA256) {
 323                 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_PSK_SHA256);
 324 #endif /* CONFIG_IEEE80211W */
 325         } else {
 326                 wpa_printf(MSG_WARNING, "Invalid key management type (%d).",
 327                            key_mgmt);
 328                 return -1;
 329         }
 330         pos += RSN_SELECTOR_LEN;
 331
 332         /* RSN Capabilities */
 333         capab = 0;
 334 #ifdef CONFIG_IEEE80211W
 335         if (sm->mfp)
 336                 capab |= WPA_CAPABILITY_MFPC;
 337         if (sm->mfp == 2)
 338                 capab |= WPA_CAPABILITY_MFPR;
 339 #endif /* CONFIG_IEEE80211W */
 340         WPA_PUT_LE16(pos, capab);
 341         pos += 2;
 342
 343         if (sm->cur_pmksa) {
 344                 /* PMKID Count (2 octets, little endian) */
 345                 *pos++ = 1;
 346                 *pos++ = 0;
 347                 /* PMKID */
 348                 os_memcpy(pos, sm->cur_pmksa->pmkid, PMKID_LEN);
 349                 pos += PMKID_LEN;
 350         }
 351
 352 #ifdef CONFIG_IEEE80211W
 353         if (mgmt_group_cipher == WPA_CIPHER_AES_128_CMAC) {
 354                 if (!sm->cur_pmksa) {
 355                         /* PMKID Count */
 356                         WPA_PUT_LE16(pos, 0);
 357                         pos += 2;
 358                 }
 359
 360                 /* Management Group Cipher Suite */
 361                 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_AES_128_CMAC);
 362                 pos += RSN_SELECTOR_LEN;
 363         }
 364 #endif /* CONFIG_IEEE80211W */
 365
 366         hdr->len = (pos - rsn_ie) - 2;
 367
 368         WPA_ASSERT((size_t) (pos - rsn_ie) <= rsn_ie_len);
 369
 370         return pos - rsn_ie;
 371 #else /* CONFIG_NO_WPA2 */
 372         return -1;
 373 #endif /* CONFIG_NO_WPA2 */
 374 }
 375
 376
 377 /**
 378  * wpa_gen_wpa_ie - Generate WPA/RSN IE based on current security policy
 379  * @sm: Pointer to WPA state machine data from wpa_sm_init()
 380  * @wpa_ie: Pointer to memory area for the generated WPA/RSN IE
 381  * @wpa_ie_len: Maximum length of the generated WPA/RSN IE
 382  * Returns: Length of the generated WPA/RSN IE or -1 on failure
 383  */
 384 int wpa_gen_wpa_ie(struct wpa_sm *sm, u8 *wpa_ie, size_t wpa_ie_len)
 385 {
 386         if (sm->proto == WPA_PROTO_RSN)
 387                 return wpa_gen_wpa_ie_rsn(wpa_ie, wpa_ie_len,
 388                                           sm->pairwise_cipher,
 389                                           sm->group_cipher,
 390                                           sm->key_mgmt, sm->mgmt_group_cipher,
 391                                           sm);
 392         else
 393                 return wpa_gen_wpa_ie_wpa(wpa_ie, wpa_ie_len,
 394                                           sm->pairwise_cipher,
 395                                           sm->group_cipher,
 396                                           sm->key_mgmt);
 397 }
 398
 399
 400 /**
 401  * wpa_parse_generic - Parse EAPOL-Key Key Data Generic IEs
 402  * @pos: Pointer to the IE header
 403  * @end: Pointer to the end of the Key Data buffer
 404  * @ie: Pointer to parsed IE data
 405  * Returns: 0 on success, 1 if end mark is found, -1 on failure
 406  */
 407 static int wpa_parse_generic(const u8 *pos, const u8 *end,
 408                              struct wpa_eapol_ie_parse *ie)
 409 {
 410         if (pos[1] == 0)
 411                 return 1;
 412
 413         if (pos[1] >= 6 &&
 414             RSN_SELECTOR_GET(pos + 2) == WPA_OUI_TYPE &&
 415             pos[2 + WPA_SELECTOR_LEN] == 1 &&
 416             pos[2 + WPA_SELECTOR_LEN + 1] == 0) {
 417                 ie->wpa_ie = pos;
 418                 ie->wpa_ie_len = pos[1] + 2;
 419                 wpa_hexdump(MSG_DEBUG, "WPA: WPA IE in EAPOL-Key",
 420                             ie->wpa_ie, ie->wpa_ie_len);
 421                 return 0;
 422         }
 423
 424         if (pos + 1 + RSN_SELECTOR_LEN < end &&
 425             pos[1] >= RSN_SELECTOR_LEN + PMKID_LEN &&
 426             RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_PMKID) {
 427                 ie->pmkid = pos + 2 + RSN_SELECTOR_LEN;
 428                 wpa_hexdump(MSG_DEBUG, "WPA: PMKID in EAPOL-Key",
 429                             pos, pos[1] + 2);
 430                 return 0;
 431         }
 432
 433         if (pos[1] > RSN_SELECTOR_LEN + 2 &&
 434             RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_GROUPKEY) {
 435                 ie->gtk = pos + 2 + RSN_SELECTOR_LEN;
 436                 ie->gtk_len = pos[1] - RSN_SELECTOR_LEN;
 437                 wpa_hexdump_key(MSG_DEBUG, "WPA: GTK in EAPOL-Key",
 438                                 pos, pos[1] + 2);
 439                 return 0;
 440         }
 441
 442         if (pos[1] > RSN_SELECTOR_LEN + 2 &&
 443             RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_MAC_ADDR) {
 444                 ie->mac_addr = pos + 2 + RSN_SELECTOR_LEN;
 445                 ie->mac_addr_len = pos[1] - RSN_SELECTOR_LEN;
 446                 wpa_hexdump(MSG_DEBUG, "WPA: MAC Address in EAPOL-Key",
 447                             pos, pos[1] + 2);
 448                 return 0;
 449         }
 450
 451 #ifdef CONFIG_PEERKEY
 452         if (pos[1] > RSN_SELECTOR_LEN + 2 &&
 453             RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_SMK) {
 454                 ie->smk = pos + 2 + RSN_SELECTOR_LEN;
 455                 ie->smk_len = pos[1] - RSN_SELECTOR_LEN;
 456                 wpa_hexdump_key(MSG_DEBUG, "WPA: SMK in EAPOL-Key",
 457                                 pos, pos[1] + 2);
 458                 return 0;
 459         }
 460
 461         if (pos[1] > RSN_SELECTOR_LEN + 2 &&
 462             RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_NONCE) {
 463                 ie->nonce = pos + 2 + RSN_SELECTOR_LEN;
 464                 ie->nonce_len = pos[1] - RSN_SELECTOR_LEN;
 465                 wpa_hexdump(MSG_DEBUG, "WPA: Nonce in EAPOL-Key",
 466                             pos, pos[1] + 2);
 467                 return 0;
 468         }
 469
 470         if (pos[1] > RSN_SELECTOR_LEN + 2 &&
 471             RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_LIFETIME) {
 472                 ie->lifetime = pos + 2 + RSN_SELECTOR_LEN;
 473                 ie->lifetime_len = pos[1] - RSN_SELECTOR_LEN;
 474                 wpa_hexdump(MSG_DEBUG, "WPA: Lifetime in EAPOL-Key",
 475                             pos, pos[1] + 2);
 476                 return 0;
 477         }
 478
 479         if (pos[1] > RSN_SELECTOR_LEN + 2 &&
 480             RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_ERROR) {
 481                 ie->error = pos + 2 + RSN_SELECTOR_LEN;
 482                 ie->error_len = pos[1] - RSN_SELECTOR_LEN;
 483                 wpa_hexdump(MSG_DEBUG, "WPA: Error in EAPOL-Key",
 484                             pos, pos[1] + 2);
 485                 return 0;
 486         }
 487 #endif /* CONFIG_PEERKEY */
 488
 489 #ifdef CONFIG_IEEE80211W
 490         if (pos[1] > RSN_SELECTOR_LEN + 2 &&
 491             RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_IGTK) {
 492                 ie->igtk = pos + 2 + RSN_SELECTOR_LEN;
 493                 ie->igtk_len = pos[1] - RSN_SELECTOR_LEN;
 494                 wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK in EAPOL-Key",
 495                                 pos, pos[1] + 2);
 496                 return 0;
 497         }
 498 #endif /* CONFIG_IEEE80211W */
 499
 500         return 0;
 501 }
 502
 503
 504 /**
 505  * wpa_supplicant_parse_ies - Parse EAPOL-Key Key Data IEs
 506  * @buf: Pointer to the Key Data buffer
 507  * @len: Key Data Length
 508  * @ie: Pointer to parsed IE data
 509  * Returns: 0 on success, -1 on failure
 510  */
 511 int wpa_supplicant_parse_ies(const u8 *buf, size_t len,
 512                              struct wpa_eapol_ie_parse *ie)
 513 {
 514         const u8 *pos, *end;
 515         int ret = 0;
 516
 517         os_memset(ie, 0, sizeof(*ie));
 518         for (pos = buf, end = pos + len; pos + 1 < end; pos += 2 + pos[1]) {
 519                 if (pos[0] == 0xdd &&
 520                     ((pos == buf + len - 1) || pos[1] == 0)) {
 521                         /* Ignore padding */
 522                         break;
 523                 }
 524                 if (pos + 2 + pos[1] > end) {
 525                         wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key Key Data "
 526                                    "underflow (ie=%d len=%d pos=%d)",
 527                                    pos[0], pos[1], (int) (pos - buf));
 528                         wpa_hexdump_key(MSG_DEBUG, "WPA: Key Data",
 529                                         buf, len);
 530                         ret = -1;
 531                         break;
 532                 }
 533                 if (*pos == WLAN_EID_RSN) {
 534                         ie->rsn_ie = pos;
 535                         ie->rsn_ie_len = pos[1] + 2;
 536                         wpa_hexdump(MSG_DEBUG, "WPA: RSN IE in EAPOL-Key",
 537                                     ie->rsn_ie, ie->rsn_ie_len);
 538 #ifdef CONFIG_IEEE80211R
 539                 } else if (*pos == WLAN_EID_MOBILITY_DOMAIN) {
 540                         ie->mdie = pos;
 541                         ie->mdie_len = pos[1] + 2;
 542                         wpa_hexdump(MSG_DEBUG, "WPA: MDIE in EAPOL-Key",
 543                                     ie->mdie, ie->mdie_len);
 544                 } else if (*pos == WLAN_EID_FAST_BSS_TRANSITION) {
 545                         ie->ftie = pos;
 546                         ie->ftie_len = pos[1] + 2;
 547                         wpa_hexdump(MSG_DEBUG, "WPA: FTIE in EAPOL-Key",
 548                                     ie->ftie, ie->ftie_len);
 549                 } else if (*pos == WLAN_EID_TIMEOUT_INTERVAL && pos[1] >= 5) {
 550                         if (pos[2] == WLAN_TIMEOUT_REASSOC_DEADLINE) {
 551                                 ie->reassoc_deadline = pos;
 552                                 wpa_hexdump(MSG_DEBUG, "WPA: Reassoc Deadline "
 553                                             "in EAPOL-Key",
 554                                             ie->reassoc_deadline, pos[1] + 2);
 555                         } else if (pos[2] == WLAN_TIMEOUT_KEY_LIFETIME) {
 556                                 ie->key_lifetime = pos;
 557                                 wpa_hexdump(MSG_DEBUG, "WPA: KeyLifetime "
 558                                             "in EAPOL-Key",
 559                                             ie->key_lifetime, pos[1] + 2);
 560                         } else {
 561                                 wpa_hexdump(MSG_DEBUG, "WPA: Unrecognized "
 562                                             "EAPOL-Key Key Data IE",
 563                                             pos, 2 + pos[1]);
 564                         }
 565 #endif /* CONFIG_IEEE80211R */
 566                 } else if (*pos == WLAN_EID_VENDOR_SPECIFIC) {
 567                         ret = wpa_parse_generic(pos, end, ie);
 568                         if (ret < 0)
 569                                 break;
 570                         if (ret > 0) {
 571                                 ret = 0;
 572                                 break;
 573                         }
 574                 } else {
 575                         wpa_hexdump(MSG_DEBUG, "WPA: Unrecognized EAPOL-Key "
 576                                     "Key Data IE", pos, 2 + pos[1]);
 577                 }
 578         }
 579
 580         return ret;
 581 }