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 */ 28int 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 38static 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 105static 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 (wpa_cipher_valid_mgmt_group(mgmt_group_cipher)) { 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, wpa_cipher_to_suite(WPA_PROTO_RSN, 213 mgmt_group_cipher)); 214 pos += RSN_SELECTOR_LEN; 215 } 216#endif /* CONFIG_IEEE80211W */ 217 218 hdr->len = (pos - rsn_ie) - 2; 219 220 WPA_ASSERT((size_t) (pos - rsn_ie) <= rsn_ie_len); 221 222 return pos - rsn_ie; 223} 224 225 226#ifdef CONFIG_HS20 227static int wpa_gen_wpa_ie_osen(u8 *wpa_ie, size_t wpa_ie_len, 228 int pairwise_cipher, int group_cipher, 229 int key_mgmt) 230{ 231 u8 *pos, *len; 232 u32 suite; 233 234 if (wpa_ie_len < 2 + 4 + RSN_SELECTOR_LEN + 235 2 + RSN_SELECTOR_LEN + 2 + RSN_SELECTOR_LEN) 236 return -1; 237 238 pos = wpa_ie; 239 *pos++ = WLAN_EID_VENDOR_SPECIFIC; 240 len = pos++; /* to be filled */ 241 WPA_PUT_BE24(pos, OUI_WFA); 242 pos += 3; 243 *pos++ = HS20_OSEN_OUI_TYPE; 244 245 /* Group Data Cipher Suite */ 246 suite = wpa_cipher_to_suite(WPA_PROTO_RSN, group_cipher); 247 if (suite == 0) { 248 wpa_printf(MSG_WARNING, "Invalid group cipher (%d).", 249 group_cipher); 250 return -1; 251 } 252 RSN_SELECTOR_PUT(pos, suite); 253 pos += RSN_SELECTOR_LEN; 254 255 /* Pairwise Cipher Suite Count and List */ 256 WPA_PUT_LE16(pos, 1); 257 pos += 2; 258 suite = wpa_cipher_to_suite(WPA_PROTO_RSN, pairwise_cipher); 259 if (suite == 0 || 260 (!wpa_cipher_valid_pairwise(pairwise_cipher) && 261 pairwise_cipher != WPA_CIPHER_NONE)) { 262 wpa_printf(MSG_WARNING, "Invalid pairwise cipher (%d).", 263 pairwise_cipher); 264 return -1; 265 } 266 RSN_SELECTOR_PUT(pos, suite); 267 pos += RSN_SELECTOR_LEN; 268 269 /* AKM Suite Count and List */ 270 WPA_PUT_LE16(pos, 1); 271 pos += 2; 272 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_OSEN); 273 pos += RSN_SELECTOR_LEN; 274 275 *len = pos - len - 1; 276 277 WPA_ASSERT((size_t) (pos - wpa_ie) <= wpa_ie_len); 278 279 return pos - wpa_ie; 280} 281#endif /* CONFIG_HS20 */ 282 283 284/** 285 * wpa_gen_wpa_ie - Generate WPA/RSN IE based on current security policy 286 * @sm: Pointer to WPA state machine data from wpa_sm_init() 287 * @wpa_ie: Pointer to memory area for the generated WPA/RSN IE 288 * @wpa_ie_len: Maximum length of the generated WPA/RSN IE 289 * Returns: Length of the generated WPA/RSN IE or -1 on failure 290 */ 291int wpa_gen_wpa_ie(struct wpa_sm *sm, u8 *wpa_ie, size_t wpa_ie_len) 292{ 293 if (sm->proto == WPA_PROTO_RSN) 294 return wpa_gen_wpa_ie_rsn(wpa_ie, wpa_ie_len, 295 sm->pairwise_cipher, 296 sm->group_cipher, 297 sm->key_mgmt, sm->mgmt_group_cipher, 298 sm); 299#ifdef CONFIG_HS20 300 else if (sm->proto == WPA_PROTO_OSEN) 301 return wpa_gen_wpa_ie_osen(wpa_ie, wpa_ie_len, 302 sm->pairwise_cipher, 303 sm->group_cipher, 304 sm->key_mgmt); 305#endif /* CONFIG_HS20 */ 306 else 307 return wpa_gen_wpa_ie_wpa(wpa_ie, wpa_ie_len, 308 sm->pairwise_cipher, 309 sm->group_cipher, 310 sm->key_mgmt); 311} 312 313 314/** 315 * wpa_parse_vendor_specific - Parse Vendor Specific IEs 316 * @pos: Pointer to the IE header 317 * @end: Pointer to the end of the Key Data buffer 318 * @ie: Pointer to parsed IE data 319 * Returns: 0 on success, 1 if end mark is found, -1 on failure 320 */ 321static int wpa_parse_vendor_specific(const u8 *pos, const u8 *end, 322 struct wpa_eapol_ie_parse *ie) 323{ 324 unsigned int oui; 325 326 if (pos[1] < 4) { 327 wpa_printf(MSG_MSGDUMP, "Too short vendor specific IE ignored (len=%u)", 328 pos[1]); 329 return 1; 330 } 331 332 oui = WPA_GET_BE24(&pos[2]); 333 if (oui == OUI_MICROSOFT && pos[5] == WMM_OUI_TYPE && pos[1] > 4) { 334 if (pos[6] == WMM_OUI_SUBTYPE_INFORMATION_ELEMENT) { 335 ie->wmm = &pos[2]; 336 ie->wmm_len = pos[1]; 337 wpa_hexdump(MSG_DEBUG, "WPA: WMM IE", 338 ie->wmm, ie->wmm_len); 339 } else if (pos[6] == WMM_OUI_SUBTYPE_PARAMETER_ELEMENT) { 340 ie->wmm = &pos[2]; 341 ie->wmm_len = pos[1]; 342 wpa_hexdump(MSG_DEBUG, "WPA: WMM Parameter Element", 343 ie->wmm, ie->wmm_len); 344 } 345 } 346 return 0; 347} 348 349 350/** 351 * wpa_parse_generic - Parse EAPOL-Key Key Data Generic IEs 352 * @pos: Pointer to the IE header 353 * @end: Pointer to the end of the Key Data buffer 354 * @ie: Pointer to parsed IE data 355 * Returns: 0 on success, 1 if end mark is found, -1 on failure 356 */ 357static int wpa_parse_generic(const u8 *pos, const u8 *end, 358 struct wpa_eapol_ie_parse *ie) 359{ 360 if (pos[1] == 0) 361 return 1; 362 363 if (pos[1] >= 6 && 364 RSN_SELECTOR_GET(pos + 2) == WPA_OUI_TYPE && 365 pos[2 + WPA_SELECTOR_LEN] == 1 && 366 pos[2 + WPA_SELECTOR_LEN + 1] == 0) { 367 ie->wpa_ie = pos; 368 ie->wpa_ie_len = pos[1] + 2; 369 wpa_hexdump(MSG_DEBUG, "WPA: WPA IE in EAPOL-Key", 370 ie->wpa_ie, ie->wpa_ie_len); 371 return 0; 372 } 373 374 if (pos + 1 + RSN_SELECTOR_LEN < end && 375 pos[1] >= RSN_SELECTOR_LEN + PMKID_LEN && 376 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_PMKID) { 377 ie->pmkid = pos + 2 + RSN_SELECTOR_LEN; 378 wpa_hexdump(MSG_DEBUG, "WPA: PMKID 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_GROUPKEY) { 385 ie->gtk = pos + 2 + RSN_SELECTOR_LEN; 386 ie->gtk_len = pos[1] - RSN_SELECTOR_LEN; 387 wpa_hexdump_key(MSG_DEBUG, "WPA: GTK 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_MAC_ADDR) { 394 ie->mac_addr = pos + 2 + RSN_SELECTOR_LEN; 395 ie->mac_addr_len = pos[1] - RSN_SELECTOR_LEN; 396 wpa_hexdump(MSG_DEBUG, "WPA: MAC Address in EAPOL-Key", 397 pos, pos[1] + 2); 398 return 0; 399 } 400 401#ifdef CONFIG_PEERKEY 402 if (pos[1] > RSN_SELECTOR_LEN + 2 && 403 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_SMK) { 404 ie->smk = pos + 2 + RSN_SELECTOR_LEN; 405 ie->smk_len = pos[1] - RSN_SELECTOR_LEN; 406 wpa_hexdump_key(MSG_DEBUG, "WPA: SMK in EAPOL-Key", 407 pos, pos[1] + 2); 408 return 0; 409 } 410 411 if (pos[1] > RSN_SELECTOR_LEN + 2 && 412 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_NONCE) { 413 ie->nonce = pos + 2 + RSN_SELECTOR_LEN; 414 ie->nonce_len = pos[1] - RSN_SELECTOR_LEN; 415 wpa_hexdump(MSG_DEBUG, "WPA: Nonce in EAPOL-Key", 416 pos, pos[1] + 2); 417 return 0; 418 } 419 420 if (pos[1] > RSN_SELECTOR_LEN + 2 && 421 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_LIFETIME) { 422 ie->lifetime = pos + 2 + RSN_SELECTOR_LEN; 423 ie->lifetime_len = pos[1] - RSN_SELECTOR_LEN; 424 wpa_hexdump(MSG_DEBUG, "WPA: Lifetime in EAPOL-Key", 425 pos, pos[1] + 2); 426 return 0; 427 } 428 429 if (pos[1] > RSN_SELECTOR_LEN + 2 && 430 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_ERROR) { 431 ie->error = pos + 2 + RSN_SELECTOR_LEN; 432 ie->error_len = pos[1] - RSN_SELECTOR_LEN; 433 wpa_hexdump(MSG_DEBUG, "WPA: Error in EAPOL-Key", 434 pos, pos[1] + 2); 435 return 0; 436 } 437#endif /* CONFIG_PEERKEY */ 438 439#ifdef CONFIG_IEEE80211W 440 if (pos[1] > RSN_SELECTOR_LEN + 2 && 441 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_IGTK) { 442 ie->igtk = pos + 2 + RSN_SELECTOR_LEN; 443 ie->igtk_len = pos[1] - RSN_SELECTOR_LEN; 444 wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK in EAPOL-Key", 445 pos, pos[1] + 2); 446 return 0; 447 } 448#endif /* CONFIG_IEEE80211W */ 449 450#ifdef CONFIG_P2P 451 if (pos[1] >= RSN_SELECTOR_LEN + 1 && 452 RSN_SELECTOR_GET(pos + 2) == WFA_KEY_DATA_IP_ADDR_REQ) { 453 ie->ip_addr_req = pos + 2 + RSN_SELECTOR_LEN; 454 wpa_hexdump(MSG_DEBUG, "WPA: IP Address Request in EAPOL-Key", 455 ie->ip_addr_req, pos[1] - RSN_SELECTOR_LEN); 456 return 0; 457 } 458 459 if (pos[1] >= RSN_SELECTOR_LEN + 3 * 4 && 460 RSN_SELECTOR_GET(pos + 2) == WFA_KEY_DATA_IP_ADDR_ALLOC) { 461 ie->ip_addr_alloc = pos + 2 + RSN_SELECTOR_LEN; 462 wpa_hexdump(MSG_DEBUG, 463 "WPA: IP Address Allocation in EAPOL-Key", 464 ie->ip_addr_alloc, pos[1] - RSN_SELECTOR_LEN); 465 return 0; 466 } 467#endif /* CONFIG_P2P */ 468 469 return 0; 470} 471 472 473/** 474 * wpa_supplicant_parse_ies - Parse EAPOL-Key Key Data IEs 475 * @buf: Pointer to the Key Data buffer 476 * @len: Key Data Length 477 * @ie: Pointer to parsed IE data 478 * Returns: 0 on success, -1 on failure 479 */ 480int wpa_supplicant_parse_ies(const u8 *buf, size_t len, 481 struct wpa_eapol_ie_parse *ie) 482{ 483 const u8 *pos, *end; 484 int ret = 0; 485 486 os_memset(ie, 0, sizeof(*ie)); 487 for (pos = buf, end = pos + len; pos + 1 < end; pos += 2 + pos[1]) { 488 if (pos[0] == 0xdd && 489 ((pos == buf + len - 1) || pos[1] == 0)) { 490 /* Ignore padding */ 491 break; 492 } 493 if (pos + 2 + pos[1] > end) { 494 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key Key Data " 495 "underflow (ie=%d len=%d pos=%d)", 496 pos[0], pos[1], (int) (pos - buf)); 497 wpa_hexdump_key(MSG_DEBUG, "WPA: Key Data", 498 buf, len); 499 ret = -1; 500 break; 501 } 502 if (*pos == WLAN_EID_RSN) { 503 ie->rsn_ie = pos; 504 ie->rsn_ie_len = pos[1] + 2; 505 wpa_hexdump(MSG_DEBUG, "WPA: RSN IE in EAPOL-Key", 506 ie->rsn_ie, ie->rsn_ie_len); 507 } else if (*pos == WLAN_EID_MOBILITY_DOMAIN) { 508 ie->mdie = pos; 509 ie->mdie_len = pos[1] + 2; 510 wpa_hexdump(MSG_DEBUG, "WPA: MDIE in EAPOL-Key", 511 ie->mdie, ie->mdie_len); 512 } else if (*pos == WLAN_EID_FAST_BSS_TRANSITION) { 513 ie->ftie = pos; 514 ie->ftie_len = pos[1] + 2; 515 wpa_hexdump(MSG_DEBUG, "WPA: FTIE in EAPOL-Key", 516 ie->ftie, ie->ftie_len); 517 } else if (*pos == WLAN_EID_TIMEOUT_INTERVAL && pos[1] >= 5) { 518 if (pos[2] == WLAN_TIMEOUT_REASSOC_DEADLINE) { 519 ie->reassoc_deadline = pos; 520 wpa_hexdump(MSG_DEBUG, "WPA: Reassoc Deadline " 521 "in EAPOL-Key", 522 ie->reassoc_deadline, pos[1] + 2); 523 } else if (pos[2] == WLAN_TIMEOUT_KEY_LIFETIME) { 524 ie->key_lifetime = pos; 525 wpa_hexdump(MSG_DEBUG, "WPA: KeyLifetime " 526 "in EAPOL-Key", 527 ie->key_lifetime, pos[1] + 2); 528 } else { 529 wpa_hexdump(MSG_DEBUG, "WPA: Unrecognized " 530 "EAPOL-Key Key Data IE", 531 pos, 2 + pos[1]); 532 } 533 } else if (*pos == WLAN_EID_LINK_ID) { 534 if (pos[1] >= 18) { 535 ie->lnkid = pos; 536 ie->lnkid_len = pos[1] + 2; 537 } 538 } else if (*pos == WLAN_EID_EXT_CAPAB) { 539 ie->ext_capab = pos; 540 ie->ext_capab_len = pos[1] + 2; 541 } else if (*pos == WLAN_EID_SUPP_RATES) { 542 ie->supp_rates = pos; 543 ie->supp_rates_len = pos[1] + 2; 544 } else if (*pos == WLAN_EID_EXT_SUPP_RATES) { 545 ie->ext_supp_rates = pos; 546 ie->ext_supp_rates_len = pos[1] + 2; 547 } else if (*pos == WLAN_EID_HT_CAP) { 548 ie->ht_capabilities = pos + 2; 549 ie->ht_capabilities_len = pos[1]; 550 } else if (*pos == WLAN_EID_VHT_AID) { 551 if (pos[1] >= 2) 552 ie->aid = WPA_GET_LE16(pos + 2) & 0x3fff; 553 } else if (*pos == WLAN_EID_VHT_CAP) { 554 ie->vht_capabilities = pos + 2; 555 ie->vht_capabilities_len = pos[1]; 556 } else if (*pos == WLAN_EID_QOS && pos[1] >= 1) { 557 ie->qosinfo = pos[2]; 558 } else if (*pos == WLAN_EID_SUPPORTED_CHANNELS) { 559 ie->supp_channels = pos + 2; 560 ie->supp_channels_len = pos[1]; 561 } else if (*pos == WLAN_EID_SUPPORTED_OPERATING_CLASSES) { 562 /* 563 * The value of the Length field of the Supported 564 * Operating Classes element is between 2 and 253. 565 * Silently skip invalid elements to avoid interop 566 * issues when trying to use the value. 567 */ 568 if (pos[1] >= 2 && pos[1] <= 253) { 569 ie->supp_oper_classes = pos + 2; 570 ie->supp_oper_classes_len = pos[1]; 571 } 572 } else if (*pos == WLAN_EID_VENDOR_SPECIFIC) { 573 ret = wpa_parse_generic(pos, end, ie); 574 if (ret < 0) 575 break; 576 if (ret > 0) { 577 ret = 0; 578 break; 579 } 580 581 ret = wpa_parse_vendor_specific(pos, end, ie); 582 if (ret < 0) 583 break; 584 if (ret > 0) { 585 ret = 0; 586 break; 587 } 588 } else { 589 wpa_hexdump(MSG_DEBUG, "WPA: Unrecognized EAPOL-Key " 590 "Key Data IE", pos, 2 + pos[1]); 591 } 592 } 593 594 return ret; 595} 596