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 software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "includes.h"
  10
  11 #include "common.h"
  12 #include "wpa.h"
  13 #include "pmksa_cache.h"
  14 #include "common/ieee802_11_defs.h"
  15 #include "wpa_i.h"
  16 #include "wpa_ie.h"
  17
  18
  19 /**
  20  * wpa_parse_wpa_ie - Parse WPA/RSN IE
  21  * @wpa_ie: Pointer to WPA or RSN IE
  22  * @wpa_ie_len: Length of the WPA/RSN IE
  23  * @data: Pointer to data area for parsing results
  24  * Returns: 0 on success, -1 on failure
  25  *
  26  * Parse the contents of WPA or RSN IE and write the parsed data into data.
  27  */
  28 int wpa_parse_wpa_ie(const u8 *wpa_ie, size_t wpa_ie_len,
  29                      struct wpa_ie_data *data)
  30 {
  31         if (wpa_ie_len >= 1 && wpa_ie[0] == WLAN_EID_RSN)
  32                 return wpa_parse_wpa_ie_rsn(wpa_ie, wpa_ie_len, data);
  33         else
  34                 return wpa_parse_wpa_ie_wpa(wpa_ie, wpa_ie_len, data);
  35 }
  36
  37
  38 static int wpa_gen_wpa_ie_wpa(u8 *wpa_ie, size_t wpa_ie_len,
  39                               int pairwise_cipher, int group_cipher,
  40                               int key_mgmt)
  41 {
  42         u8 *pos;
  43         struct wpa_ie_hdr *hdr;
  44         u32 suite;
  45
  46         if (wpa_ie_len < sizeof(*hdr) + WPA_SELECTOR_LEN +
  47             2 + WPA_SELECTOR_LEN + 2 + WPA_SELECTOR_LEN)
  48                 return -1;
  49
  50         hdr = (struct wpa_ie_hdr *) wpa_ie;
  51         hdr->elem_id = WLAN_EID_VENDOR_SPECIFIC;
  52         RSN_SELECTOR_PUT(hdr->oui, WPA_OUI_TYPE);
  53         WPA_PUT_LE16(hdr->version, WPA_VERSION);
  54         pos = (u8 *) (hdr + 1);
  55
  56         suite = wpa_cipher_to_suite(WPA_PROTO_WPA, group_cipher);
  57         if (suite == 0) {
  58                 wpa_printf(MSG_WARNING, "Invalid group cipher (%d).",
  59                            group_cipher);
  60                 return -1;
  61         }
  62         RSN_SELECTOR_PUT(pos, suite);
  63         pos += WPA_SELECTOR_LEN;
  64
  65         *pos++ = 1;
  66         *pos++ = 0;
  67         suite = wpa_cipher_to_suite(WPA_PROTO_WPA, pairwise_cipher);
  68         if (suite == 0 ||
  69             (!wpa_cipher_valid_pairwise(pairwise_cipher) &&
  70              pairwise_cipher != WPA_CIPHER_NONE)) {
  71                 wpa_printf(MSG_WARNING, "Invalid pairwise cipher (%d).",
  72                            pairwise_cipher);
  73                 return -1;
  74         }
  75         RSN_SELECTOR_PUT(pos, suite);
  76         pos += WPA_SELECTOR_LEN;
  77
  78         *pos++ = 1;
  79         *pos++ = 0;
  80         if (key_mgmt == WPA_KEY_MGMT_IEEE8021X) {
  81                 RSN_SELECTOR_PUT(pos, WPA_AUTH_KEY_MGMT_UNSPEC_802_1X);
  82         } else if (key_mgmt == WPA_KEY_MGMT_PSK) {
  83                 RSN_SELECTOR_PUT(pos, WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X);
  84         } else if (key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
  85                 RSN_SELECTOR_PUT(pos, WPA_AUTH_KEY_MGMT_NONE);
  86         } else if (key_mgmt == WPA_KEY_MGMT_CCKM) {
  87                 RSN_SELECTOR_PUT(pos, WPA_AUTH_KEY_MGMT_CCKM);
  88         } else {
  89                 wpa_printf(MSG_WARNING, "Invalid key management type (%d).",
  90                            key_mgmt);
  91                 return -1;
  92         }
  93         pos += WPA_SELECTOR_LEN;
  94
  95         /* WPA Capabilities; use defaults, so no need to include it */
  96
  97         hdr->len = (pos - wpa_ie) - 2;
  98
  99         WPA_ASSERT((size_t) (pos - wpa_ie) <= wpa_ie_len);
 100
 101         return pos - wpa_ie;
 102 }
 103
 104
 105 static int wpa_gen_wpa_ie_rsn(u8 *rsn_ie, size_t rsn_ie_len,
 106                               int pairwise_cipher, int group_cipher,
 107                               int key_mgmt, int mgmt_group_cipher,
 108                               struct wpa_sm *sm)
 109 {
 110         u8 *pos;
 111         struct rsn_ie_hdr *hdr;
 112         u16 capab;
 113         u32 suite;
 114
 115         if (rsn_ie_len < sizeof(*hdr) + RSN_SELECTOR_LEN +
 116             2 + RSN_SELECTOR_LEN + 2 + RSN_SELECTOR_LEN + 2 +
 117             (sm->cur_pmksa ? 2 + PMKID_LEN : 0)) {
 118                 wpa_printf(MSG_DEBUG, "RSN: Too short IE buffer (%lu bytes)",
 119                            (unsigned long) rsn_ie_len);
 120                 return -1;
 121         }
 122
 123         hdr = (struct rsn_ie_hdr *) rsn_ie;
 124         hdr->elem_id = WLAN_EID_RSN;
 125         WPA_PUT_LE16(hdr->version, RSN_VERSION);
 126         pos = (u8 *) (hdr + 1);
 127
 128         suite = wpa_cipher_to_suite(WPA_PROTO_RSN, group_cipher);
 129         if (suite == 0) {
 130                 wpa_printf(MSG_WARNING, "Invalid group cipher (%d).",
 131                            group_cipher);
 132                 return -1;
 133         }
 134         RSN_SELECTOR_PUT(pos, suite);
 135         pos += RSN_SELECTOR_LEN;
 136
 137         *pos++ = 1;
 138         *pos++ = 0;
 139         suite = wpa_cipher_to_suite(WPA_PROTO_RSN, pairwise_cipher);
 140         if (suite == 0 ||
 141             (!wpa_cipher_valid_pairwise(pairwise_cipher) &&
 142              pairwise_cipher != WPA_CIPHER_NONE)) {
 143                 wpa_printf(MSG_WARNING, "Invalid pairwise cipher (%d).",
 144                            pairwise_cipher);
 145                 return -1;
 146         }
 147         RSN_SELECTOR_PUT(pos, suite);
 148         pos += RSN_SELECTOR_LEN;
 149
 150         *pos++ = 1;
 151         *pos++ = 0;
 152         if (key_mgmt == WPA_KEY_MGMT_IEEE8021X) {
 153                 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_UNSPEC_802_1X);
 154         } else if (key_mgmt == WPA_KEY_MGMT_PSK) {
 155                 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X);
 156         } else if (key_mgmt == WPA_KEY_MGMT_CCKM) {
 157                 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_CCKM);
 158 #ifdef CONFIG_IEEE80211R
 159         } else if (key_mgmt == WPA_KEY_MGMT_FT_IEEE8021X) {
 160                 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_802_1X);
 161         } else if (key_mgmt == WPA_KEY_MGMT_FT_PSK) {
 162                 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_PSK);
 163 #endif /* CONFIG_IEEE80211R */
 164 #ifdef CONFIG_IEEE80211W
 165         } else if (key_mgmt == WPA_KEY_MGMT_IEEE8021X_SHA256) {
 166                 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_802_1X_SHA256);
 167         } else if (key_mgmt == WPA_KEY_MGMT_PSK_SHA256) {
 168                 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_PSK_SHA256);
 169 #endif /* CONFIG_IEEE80211W */
 170 #ifdef CONFIG_SAE
 171         } else if (key_mgmt == WPA_KEY_MGMT_SAE) {
 172                 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_SAE);
 173         } else if (key_mgmt == WPA_KEY_MGMT_FT_SAE) {
 174                 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_SAE);
 175 #endif /* CONFIG_SAE */
 176         } else {
 177                 wpa_printf(MSG_WARNING, "Invalid key management type (%d).",
 178                            key_mgmt);
 179                 return -1;
 180         }
 181         pos += RSN_SELECTOR_LEN;
 182
 183         /* RSN Capabilities */
 184         capab = 0;
 185 #ifdef CONFIG_IEEE80211W
 186         if (sm->mfp)
 187                 capab |= WPA_CAPABILITY_MFPC;
 188         if (sm->mfp == 2)
 189                 capab |= WPA_CAPABILITY_MFPR;
 190 #endif /* CONFIG_IEEE80211W */
 191         WPA_PUT_LE16(pos, capab);
 192         pos += 2;
 193
 194         if (sm->cur_pmksa) {
 195                 /* PMKID Count (2 octets, little endian) */
 196                 *pos++ = 1;
 197                 *pos++ = 0;
 198                 /* PMKID */
 199                 os_memcpy(pos, sm->cur_pmksa->pmkid, PMKID_LEN);
 200                 pos += PMKID_LEN;
 201         }
 202
 203 #ifdef CONFIG_IEEE80211W
 204         if (mgmt_group_cipher == WPA_CIPHER_AES_128_CMAC) {
 205                 if (!sm->cur_pmksa) {
 206                         /* PMKID Count */
 207                         WPA_PUT_LE16(pos, 0);
 208                         pos += 2;
 209                 }
 210
 211                 /* Management Group Cipher Suite */
 212                 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_AES_128_CMAC);
 213                 pos += RSN_SELECTOR_LEN;
 214         }
 215 #endif /* CONFIG_IEEE80211W */
 216
 217         hdr->len = (pos - rsn_ie) - 2;
 218
 219         WPA_ASSERT((size_t) (pos - rsn_ie) <= rsn_ie_len);
 220
 221         return pos - rsn_ie;
 222 }
 223
 224
 225 #ifdef CONFIG_HS20
 226 static int wpa_gen_wpa_ie_osen(u8 *wpa_ie, size_t wpa_ie_len,
 227                                int pairwise_cipher, int group_cipher,
 228                                int key_mgmt)
 229 {
 230         u8 *pos, *len;
 231         u32 suite;
 232
 233         if (wpa_ie_len < 2 + 4 + RSN_SELECTOR_LEN +
 234             2 + RSN_SELECTOR_LEN + 2 + RSN_SELECTOR_LEN)
 235                 return -1;
 236
 237         pos = wpa_ie;
 238         *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 239         len = pos++; /* to be filled */
 240         WPA_PUT_BE24(pos, OUI_WFA);
 241         pos += 3;
 242         *pos++ = HS20_OSEN_OUI_TYPE;
 243
 244         /* Group Data Cipher Suite */
 245         suite = wpa_cipher_to_suite(WPA_PROTO_RSN, group_cipher);
 246         if (suite == 0) {
 247                 wpa_printf(MSG_WARNING, "Invalid group cipher (%d).",
 248                            group_cipher);
 249                 return -1;
 250         }
 251         RSN_SELECTOR_PUT(pos, suite);
 252         pos += RSN_SELECTOR_LEN;
 253
 254         /* Pairwise Cipher Suite Count and List */
 255         WPA_PUT_LE16(pos, 1);
 256         pos += 2;
 257         suite = wpa_cipher_to_suite(WPA_PROTO_RSN, pairwise_cipher);
 258         if (suite == 0 ||
 259             (!wpa_cipher_valid_pairwise(pairwise_cipher) &&
 260              pairwise_cipher != WPA_CIPHER_NONE)) {
 261                 wpa_printf(MSG_WARNING, "Invalid pairwise cipher (%d).",
 262                            pairwise_cipher);
 263                 return -1;
 264         }
 265         RSN_SELECTOR_PUT(pos, suite);
 266         pos += RSN_SELECTOR_LEN;
 267
 268         /* AKM Suite Count and List */
 269         WPA_PUT_LE16(pos, 1);
 270         pos += 2;
 271         RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_OSEN);
 272         pos += RSN_SELECTOR_LEN;
 273
 274         *len = pos - len - 1;
 275
 276         WPA_ASSERT((size_t) (pos - wpa_ie) <= wpa_ie_len);
 277
 278         return pos - wpa_ie;
 279 }
 280 #endif /* CONFIG_HS20 */
 281
 282
 283 /**
 284  * wpa_gen_wpa_ie - Generate WPA/RSN IE based on current security policy
 285  * @sm: Pointer to WPA state machine data from wpa_sm_init()
 286  * @wpa_ie: Pointer to memory area for the generated WPA/RSN IE
 287  * @wpa_ie_len: Maximum length of the generated WPA/RSN IE
 288  * Returns: Length of the generated WPA/RSN IE or -1 on failure
 289  */
 290 int wpa_gen_wpa_ie(struct wpa_sm *sm, u8 *wpa_ie, size_t wpa_ie_len)
 291 {
 292         if (sm->proto == WPA_PROTO_RSN)
 293                 return wpa_gen_wpa_ie_rsn(wpa_ie, wpa_ie_len,
 294                                           sm->pairwise_cipher,
 295                                           sm->group_cipher,
 296                                           sm->key_mgmt, sm->mgmt_group_cipher,
 297                                           sm);
 298 #ifdef CONFIG_HS20
 299         else if (sm->proto == WPA_PROTO_OSEN)
 300                 return wpa_gen_wpa_ie_osen(wpa_ie, wpa_ie_len,
 301                                            sm->pairwise_cipher,
 302                                            sm->group_cipher,
 303                                            sm->key_mgmt);
 304 #endif /* CONFIG_HS20 */
 305         else
 306                 return wpa_gen_wpa_ie_wpa(wpa_ie, wpa_ie_len,
 307                                           sm->pairwise_cipher,
 308                                           sm->group_cipher,
 309                                           sm->key_mgmt);
 310 }
 311
 312
 313 /**
 314  * wpa_parse_generic - Parse EAPOL-Key Key Data Generic IEs
 315  * @pos: Pointer to the IE header
 316  * @end: Pointer to the end of the Key Data buffer
 317  * @ie: Pointer to parsed IE data
 318  * Returns: 0 on success, 1 if end mark is found, -1 on failure
 319  */
 320 static int wpa_parse_generic(const u8 *pos, const u8 *end,
 321                              struct wpa_eapol_ie_parse *ie)
 322 {
 323         if (pos[1] == 0)
 324                 return 1;
 325
 326         if (pos[1] >= 6 &&
 327             RSN_SELECTOR_GET(pos + 2) == WPA_OUI_TYPE &&
 328             pos[2 + WPA_SELECTOR_LEN] == 1 &&
 329             pos[2 + WPA_SELECTOR_LEN + 1] == 0) {
 330                 ie->wpa_ie = pos;
 331                 ie->wpa_ie_len = pos[1] + 2;
 332                 wpa_hexdump(MSG_DEBUG, "WPA: WPA IE in EAPOL-Key",
 333                             ie->wpa_ie, ie->wpa_ie_len);
 334                 return 0;
 335         }
 336
 337         if (pos + 1 + RSN_SELECTOR_LEN < end &&
 338             pos[1] >= RSN_SELECTOR_LEN + PMKID_LEN &&
 339             RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_PMKID) {
 340                 ie->pmkid = pos + 2 + RSN_SELECTOR_LEN;
 341                 wpa_hexdump(MSG_DEBUG, "WPA: PMKID in EAPOL-Key",
 342                             pos, pos[1] + 2);
 343                 return 0;
 344         }
 345
 346         if (pos[1] > RSN_SELECTOR_LEN + 2 &&
 347             RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_GROUPKEY) {
 348                 ie->gtk = pos + 2 + RSN_SELECTOR_LEN;
 349                 ie->gtk_len = pos[1] - RSN_SELECTOR_LEN;
 350                 wpa_hexdump_key(MSG_DEBUG, "WPA: GTK in EAPOL-Key",
 351                                 pos, pos[1] + 2);
 352                 return 0;
 353         }
 354
 355         if (pos[1] > RSN_SELECTOR_LEN + 2 &&
 356             RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_MAC_ADDR) {
 357                 ie->mac_addr = pos + 2 + RSN_SELECTOR_LEN;
 358                 ie->mac_addr_len = pos[1] - RSN_SELECTOR_LEN;
 359                 wpa_hexdump(MSG_DEBUG, "WPA: MAC Address in EAPOL-Key",
 360                             pos, pos[1] + 2);
 361                 return 0;
 362         }
 363
 364 #ifdef CONFIG_PEERKEY
 365         if (pos[1] > RSN_SELECTOR_LEN + 2 &&
 366             RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_SMK) {
 367                 ie->smk = pos + 2 + RSN_SELECTOR_LEN;
 368                 ie->smk_len = pos[1] - RSN_SELECTOR_LEN;
 369                 wpa_hexdump_key(MSG_DEBUG, "WPA: SMK in EAPOL-Key",
 370                                 pos, pos[1] + 2);
 371                 return 0;
 372         }
 373
 374         if (pos[1] > RSN_SELECTOR_LEN + 2 &&
 375             RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_NONCE) {
 376                 ie->nonce = pos + 2 + RSN_SELECTOR_LEN;
 377                 ie->nonce_len = pos[1] - RSN_SELECTOR_LEN;
 378                 wpa_hexdump(MSG_DEBUG, "WPA: Nonce in EAPOL-Key",
 379                             pos, pos[1] + 2);
 380                 return 0;
 381         }
 382
 383         if (pos[1] > RSN_SELECTOR_LEN + 2 &&
 384             RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_LIFETIME) {
 385                 ie->lifetime = pos + 2 + RSN_SELECTOR_LEN;
 386                 ie->lifetime_len = pos[1] - RSN_SELECTOR_LEN;
 387                 wpa_hexdump(MSG_DEBUG, "WPA: Lifetime in EAPOL-Key",
 388                             pos, pos[1] + 2);
 389                 return 0;
 390         }
 391
 392         if (pos[1] > RSN_SELECTOR_LEN + 2 &&
 393             RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_ERROR) {
 394                 ie->error = pos + 2 + RSN_SELECTOR_LEN;
 395                 ie->error_len = pos[1] - RSN_SELECTOR_LEN;
 396                 wpa_hexdump(MSG_DEBUG, "WPA: Error in EAPOL-Key",
 397                             pos, pos[1] + 2);
 398                 return 0;
 399         }
 400 #endif /* CONFIG_PEERKEY */
 401
 402 #ifdef CONFIG_IEEE80211W
 403         if (pos[1] > RSN_SELECTOR_LEN + 2 &&
 404             RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_IGTK) {
 405                 ie->igtk = pos + 2 + RSN_SELECTOR_LEN;
 406                 ie->igtk_len = pos[1] - RSN_SELECTOR_LEN;
 407                 wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK in EAPOL-Key",
 408                                 pos, pos[1] + 2);
 409                 return 0;
 410         }
 411 #endif /* CONFIG_IEEE80211W */
 412
 413 #ifdef CONFIG_P2P
 414         if (pos[1] >= RSN_SELECTOR_LEN + 1 &&
 415             RSN_SELECTOR_GET(pos + 2) == WFA_KEY_DATA_IP_ADDR_REQ) {
 416                 ie->ip_addr_req = pos + 2 + RSN_SELECTOR_LEN;
 417                 wpa_hexdump(MSG_DEBUG, "WPA: IP Address Request in EAPOL-Key",
 418                             ie->ip_addr_req, pos[1] - RSN_SELECTOR_LEN);
 419                 return 0;
 420         }
 421
 422         if (pos[1] >= RSN_SELECTOR_LEN + 3 * 4 &&
 423             RSN_SELECTOR_GET(pos + 2) == WFA_KEY_DATA_IP_ADDR_ALLOC) {
 424                 ie->ip_addr_alloc = pos + 2 + RSN_SELECTOR_LEN;
 425                 wpa_hexdump(MSG_DEBUG,
 426                             "WPA: IP Address Allocation in EAPOL-Key",
 427                             ie->ip_addr_alloc, pos[1] - RSN_SELECTOR_LEN);
 428                 return 0;
 429         }
 430 #endif /* CONFIG_P2P */
 431
 432         return 0;
 433 }
 434
 435
 436 /**
 437  * wpa_supplicant_parse_ies - Parse EAPOL-Key Key Data IEs
 438  * @buf: Pointer to the Key Data buffer
 439  * @len: Key Data Length
 440  * @ie: Pointer to parsed IE data
 441  * Returns: 0 on success, -1 on failure
 442  */
 443 int wpa_supplicant_parse_ies(const u8 *buf, size_t len,
 444                              struct wpa_eapol_ie_parse *ie)
 445 {
 446         const u8 *pos, *end;
 447         int ret = 0;
 448
 449         os_memset(ie, 0, sizeof(*ie));
 450         for (pos = buf, end = pos + len; pos + 1 < end; pos += 2 + pos[1]) {
 451                 if (pos[0] == 0xdd &&
 452                     ((pos == buf + len - 1) || pos[1] == 0)) {
 453                         /* Ignore padding */
 454                         break;
 455                 }
 456                 if (pos + 2 + pos[1] > end) {
 457                         wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key Key Data "
 458                                    "underflow (ie=%d len=%d pos=%d)",
 459                                    pos[0], pos[1], (int) (pos - buf));
 460                         wpa_hexdump_key(MSG_DEBUG, "WPA: Key Data",
 461                                         buf, len);
 462                         ret = -1;
 463                         break;
 464                 }
 465                 if (*pos == WLAN_EID_RSN) {
 466                         ie->rsn_ie = pos;
 467                         ie->rsn_ie_len = pos[1] + 2;
 468                         wpa_hexdump(MSG_DEBUG, "WPA: RSN IE in EAPOL-Key",
 469                                     ie->rsn_ie, ie->rsn_ie_len);
 470                 } else if (*pos == WLAN_EID_MOBILITY_DOMAIN) {
 471                         ie->mdie = pos;
 472                         ie->mdie_len = pos[1] + 2;
 473                         wpa_hexdump(MSG_DEBUG, "WPA: MDIE in EAPOL-Key",
 474                                     ie->mdie, ie->mdie_len);
 475                 } else if (*pos == WLAN_EID_FAST_BSS_TRANSITION) {
 476                         ie->ftie = pos;
 477                         ie->ftie_len = pos[1] + 2;
 478                         wpa_hexdump(MSG_DEBUG, "WPA: FTIE in EAPOL-Key",
 479                                     ie->ftie, ie->ftie_len);
 480                 } else if (*pos == WLAN_EID_TIMEOUT_INTERVAL && pos[1] >= 5) {
 481                         if (pos[2] == WLAN_TIMEOUT_REASSOC_DEADLINE) {
 482                                 ie->reassoc_deadline = pos;
 483                                 wpa_hexdump(MSG_DEBUG, "WPA: Reassoc Deadline "
 484                                             "in EAPOL-Key",
 485                                             ie->reassoc_deadline, pos[1] + 2);
 486                         } else if (pos[2] == WLAN_TIMEOUT_KEY_LIFETIME) {
 487                                 ie->key_lifetime = pos;
 488                                 wpa_hexdump(MSG_DEBUG, "WPA: KeyLifetime "
 489                                             "in EAPOL-Key",
 490                                             ie->key_lifetime, pos[1] + 2);
 491                         } else {
 492                                 wpa_hexdump(MSG_DEBUG, "WPA: Unrecognized "
 493                                             "EAPOL-Key Key Data IE",
 494                                             pos, 2 + pos[1]);
 495                         }
 496                 } else if (*pos == WLAN_EID_LINK_ID) {
 497                         if (pos[1] >= 18) {
 498                                 ie->lnkid = pos;
 499                                 ie->lnkid_len = pos[1] + 2;
 500                         }
 501                 } else if (*pos == WLAN_EID_EXT_CAPAB) {
 502                         ie->ext_capab = pos;
 503                         ie->ext_capab_len = pos[1] + 2;
 504                 } else if (*pos == WLAN_EID_SUPP_RATES) {
 505                         ie->supp_rates = pos;
 506                         ie->supp_rates_len = pos[1] + 2;
 507                 } else if (*pos == WLAN_EID_EXT_SUPP_RATES) {
 508                         ie->ext_supp_rates = pos;
 509                         ie->ext_supp_rates_len = pos[1] + 2;
 510                 } else if (*pos == WLAN_EID_HT_CAP) {
 511                         ie->ht_capabilities = pos + 2;
 512                         ie->ht_capabilities_len = pos[1];
 513                 } else if (*pos == WLAN_EID_VHT_AID) {
 514                         if (pos[1] >= 2)
 515                                 ie->aid = WPA_GET_LE16(pos + 2);
 516                 } else if (*pos == WLAN_EID_VHT_CAP) {
 517                         ie->vht_capabilities = pos + 2;
 518                         ie->vht_capabilities_len = pos[1];
 519                 } else if (*pos == WLAN_EID_QOS && pos[1] >= 1) {
 520                         ie->qosinfo = pos[2];
 521                 } else if (*pos == WLAN_EID_SUPPORTED_CHANNELS) {
 522                         ie->supp_channels = pos + 2;
 523                         ie->supp_channels_len = pos[1];
 524                 } else if (*pos == WLAN_EID_SUPPORTED_OPERATING_CLASSES) {
 525                         /*
 526                          * The value of the Length field of the Supported
 527                          * Operating Classes element is between 2 and 253.
 528                          * Silently skip invalid elements to avoid interop
 529                          * issues when trying to use the value.
 530                          */
 531                         if (pos[1] >= 2 && pos[1] <= 253) {
 532                                 ie->supp_oper_classes = pos + 2;
 533                                 ie->supp_oper_classes_len = pos[1];
 534                         }
 535                 } else if (*pos == WLAN_EID_VENDOR_SPECIFIC) {
 536                         ret = wpa_parse_generic(pos, end, ie);
 537                         if (ret < 0)
 538                                 break;
 539                         if (ret > 0) {
 540                                 ret = 0;
 541                                 break;
 542                         }
 543                 } else {
 544                         wpa_hexdump(MSG_DEBUG, "WPA: Unrecognized EAPOL-Key "
 545                                     "Key Data IE", pos, 2 + pos[1]);
 546                 }
 547         }
 548
 549         return ret;
 550 }