1/* 2 * wpa_supplicant - WPA/RSN IE and KDE processing 3 * Copyright (c) 2003-2015, 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 if (wpa_ie_len >= 6 && wpa_ie[0] == WLAN_EID_VENDOR_SPECIFIC && 34 wpa_ie[1] >= 4 && WPA_GET_BE32(&wpa_ie[2]) == OSEN_IE_VENDOR_TYPE) 35 return wpa_parse_wpa_ie_rsn(wpa_ie, wpa_ie_len, data); 36 else 37 return wpa_parse_wpa_ie_wpa(wpa_ie, wpa_ie_len, data); 38} 39 40 41static int wpa_gen_wpa_ie_wpa(u8 *wpa_ie, size_t wpa_ie_len, 42 int pairwise_cipher, int group_cipher, 43 int key_mgmt) 44{ 45 u8 *pos; 46 struct wpa_ie_hdr *hdr; 47 u32 suite; 48 49 if (wpa_ie_len < sizeof(*hdr) + WPA_SELECTOR_LEN + 50 2 + WPA_SELECTOR_LEN + 2 + WPA_SELECTOR_LEN) 51 return -1; 52 53 hdr = (struct wpa_ie_hdr *) wpa_ie; 54 hdr->elem_id = WLAN_EID_VENDOR_SPECIFIC; 55 RSN_SELECTOR_PUT(hdr->oui, WPA_OUI_TYPE); 56 WPA_PUT_LE16(hdr->version, WPA_VERSION); 57 pos = (u8 *) (hdr + 1); 58 59 suite = wpa_cipher_to_suite(WPA_PROTO_WPA, group_cipher); 60 if (suite == 0) { 61 wpa_printf(MSG_WARNING, "Invalid group cipher (%d).", 62 group_cipher); 63 return -1; 64 } 65 RSN_SELECTOR_PUT(pos, suite); 66 pos += WPA_SELECTOR_LEN; 67 68 *pos++ = 1; 69 *pos++ = 0; 70 suite = wpa_cipher_to_suite(WPA_PROTO_WPA, pairwise_cipher); 71 if (suite == 0 || 72 (!wpa_cipher_valid_pairwise(pairwise_cipher) && 73 pairwise_cipher != WPA_CIPHER_NONE)) { 74 wpa_printf(MSG_WARNING, "Invalid pairwise cipher (%d).", 75 pairwise_cipher); 76 return -1; 77 } 78 RSN_SELECTOR_PUT(pos, suite); 79 pos += WPA_SELECTOR_LEN; 80 81 *pos++ = 1; 82 *pos++ = 0; 83 if (key_mgmt == WPA_KEY_MGMT_IEEE8021X) { 84 RSN_SELECTOR_PUT(pos, WPA_AUTH_KEY_MGMT_UNSPEC_802_1X); 85 } else if (key_mgmt == WPA_KEY_MGMT_PSK) { 86 RSN_SELECTOR_PUT(pos, WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X); 87 } else if (key_mgmt == WPA_KEY_MGMT_WPA_NONE) { 88 RSN_SELECTOR_PUT(pos, WPA_AUTH_KEY_MGMT_NONE); 89 } else if (key_mgmt == WPA_KEY_MGMT_CCKM) { 90 RSN_SELECTOR_PUT(pos, WPA_AUTH_KEY_MGMT_CCKM); 91 } else { 92 wpa_printf(MSG_WARNING, "Invalid key management type (%d).", 93 key_mgmt); 94 return -1; 95 } 96 pos += WPA_SELECTOR_LEN; 97 98 /* WPA Capabilities; use defaults, so no need to include it */ 99 100 hdr->len = (pos - wpa_ie) - 2; 101 102 WPA_ASSERT((size_t) (pos - wpa_ie) <= wpa_ie_len); 103 104 return pos - wpa_ie; 105} 106 107 108static int wpa_gen_wpa_ie_rsn(u8 *rsn_ie, size_t rsn_ie_len, 109 int pairwise_cipher, int group_cipher, 110 int key_mgmt, int mgmt_group_cipher, 111 struct wpa_sm *sm) 112{ 113 u8 *pos; 114 struct rsn_ie_hdr *hdr; 115 u16 capab; 116 u32 suite; 117 118 if (rsn_ie_len < sizeof(*hdr) + RSN_SELECTOR_LEN + 119 2 + RSN_SELECTOR_LEN + 2 + RSN_SELECTOR_LEN + 2 + 120 (sm->cur_pmksa ? 2 + PMKID_LEN : 0)) { 121 wpa_printf(MSG_DEBUG, "RSN: Too short IE buffer (%lu bytes)", 122 (unsigned long) rsn_ie_len); 123 return -1; 124 } 125 126 hdr = (struct rsn_ie_hdr *) rsn_ie; 127 hdr->elem_id = WLAN_EID_RSN; 128 WPA_PUT_LE16(hdr->version, RSN_VERSION); 129 pos = (u8 *) (hdr + 1); 130 131 suite = wpa_cipher_to_suite(WPA_PROTO_RSN, group_cipher); 132 if (suite == 0) { 133 wpa_printf(MSG_WARNING, "Invalid group cipher (%d).", 134 group_cipher); 135 return -1; 136 } 137 RSN_SELECTOR_PUT(pos, suite); 138 pos += RSN_SELECTOR_LEN; 139 140 *pos++ = 1; 141 *pos++ = 0; 142 suite = wpa_cipher_to_suite(WPA_PROTO_RSN, pairwise_cipher); 143 if (suite == 0 || 144 (!wpa_cipher_valid_pairwise(pairwise_cipher) && 145 pairwise_cipher != WPA_CIPHER_NONE)) { 146 wpa_printf(MSG_WARNING, "Invalid pairwise cipher (%d).", 147 pairwise_cipher); 148 return -1; 149 } 150 RSN_SELECTOR_PUT(pos, suite); 151 pos += RSN_SELECTOR_LEN; 152 153 *pos++ = 1; 154 *pos++ = 0; 155 if (key_mgmt == WPA_KEY_MGMT_IEEE8021X) { 156 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_UNSPEC_802_1X); 157 } else if (key_mgmt == WPA_KEY_MGMT_PSK) { 158 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X); 159 } else if (key_mgmt == WPA_KEY_MGMT_CCKM) { 160 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_CCKM); 161#ifdef CONFIG_IEEE80211R 162 } else if (key_mgmt == WPA_KEY_MGMT_FT_IEEE8021X) { 163 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_802_1X); 164 } else if (key_mgmt == WPA_KEY_MGMT_FT_PSK) { 165 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_PSK); 166#endif /* CONFIG_IEEE80211R */ 167#ifdef CONFIG_IEEE80211W 168 } else if (key_mgmt == WPA_KEY_MGMT_IEEE8021X_SHA256) { 169 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_802_1X_SHA256); 170 } else if (key_mgmt == WPA_KEY_MGMT_PSK_SHA256) { 171 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_PSK_SHA256); 172#endif /* CONFIG_IEEE80211W */ 173#ifdef CONFIG_SAE 174 } else if (key_mgmt == WPA_KEY_MGMT_SAE) { 175 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_SAE); 176 } else if (key_mgmt == WPA_KEY_MGMT_FT_SAE) { 177 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_SAE); 178#endif /* CONFIG_SAE */ 179 } else if (key_mgmt == WPA_KEY_MGMT_IEEE8021X_SUITE_B_192) { 180 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_802_1X_SUITE_B_192); 181 } else if (key_mgmt == WPA_KEY_MGMT_IEEE8021X_SUITE_B) { 182 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_802_1X_SUITE_B); 183 } else { 184 wpa_printf(MSG_WARNING, "Invalid key management type (%d).", 185 key_mgmt); 186 return -1; 187 } 188 pos += RSN_SELECTOR_LEN; 189 190 /* RSN Capabilities */ 191 capab = 0; 192#ifdef CONFIG_IEEE80211W 193 if (sm->mfp) 194 capab |= WPA_CAPABILITY_MFPC; 195 if (sm->mfp == 2) 196 capab |= WPA_CAPABILITY_MFPR; 197#endif /* CONFIG_IEEE80211W */ 198 WPA_PUT_LE16(pos, capab); 199 pos += 2; 200 201 if (sm->cur_pmksa) { 202 /* PMKID Count (2 octets, little endian) */ 203 *pos++ = 1; 204 *pos++ = 0; 205 /* PMKID */ 206 os_memcpy(pos, sm->cur_pmksa->pmkid, PMKID_LEN); 207 pos += PMKID_LEN; 208 } 209 210#ifdef CONFIG_IEEE80211W 211 if (wpa_cipher_valid_mgmt_group(mgmt_group_cipher)) { 212 if (!sm->cur_pmksa) { 213 /* PMKID Count */ 214 WPA_PUT_LE16(pos, 0); 215 pos += 2; 216 } 217 218 /* Management Group Cipher Suite */ 219 RSN_SELECTOR_PUT(pos, wpa_cipher_to_suite(WPA_PROTO_RSN, 220 mgmt_group_cipher)); 221 pos += RSN_SELECTOR_LEN; 222 } 223#endif /* CONFIG_IEEE80211W */ 224 225 hdr->len = (pos - rsn_ie) - 2; 226 227 WPA_ASSERT((size_t) (pos - rsn_ie) <= rsn_ie_len); 228 229 return pos - rsn_ie; 230} 231 232 233#ifdef CONFIG_HS20 234static int wpa_gen_wpa_ie_osen(u8 *wpa_ie, size_t wpa_ie_len, 235 int pairwise_cipher, int group_cipher, 236 int key_mgmt) 237{ 238 u8 *pos, *len; 239 u32 suite; 240 241 if (wpa_ie_len < 2 + 4 + RSN_SELECTOR_LEN + 242 2 + RSN_SELECTOR_LEN + 2 + RSN_SELECTOR_LEN) 243 return -1; 244 245 pos = wpa_ie; 246 *pos++ = WLAN_EID_VENDOR_SPECIFIC; 247 len = pos++; /* to be filled */ 248 WPA_PUT_BE24(pos, OUI_WFA); 249 pos += 3; 250 *pos++ = HS20_OSEN_OUI_TYPE; 251 252 /* Group Data Cipher Suite */ 253 suite = wpa_cipher_to_suite(WPA_PROTO_RSN, group_cipher); 254 if (suite == 0) { 255 wpa_printf(MSG_WARNING, "Invalid group cipher (%d).", 256 group_cipher); 257 return -1; 258 } 259 RSN_SELECTOR_PUT(pos, suite); 260 pos += RSN_SELECTOR_LEN; 261 262 /* Pairwise Cipher Suite Count and List */ 263 WPA_PUT_LE16(pos, 1); 264 pos += 2; 265 suite = wpa_cipher_to_suite(WPA_PROTO_RSN, pairwise_cipher); 266 if (suite == 0 || 267 (!wpa_cipher_valid_pairwise(pairwise_cipher) && 268 pairwise_cipher != WPA_CIPHER_NONE)) { 269 wpa_printf(MSG_WARNING, "Invalid pairwise cipher (%d).", 270 pairwise_cipher); 271 return -1; 272 } 273 RSN_SELECTOR_PUT(pos, suite); 274 pos += RSN_SELECTOR_LEN; 275 276 /* AKM Suite Count and List */ 277 WPA_PUT_LE16(pos, 1); 278 pos += 2; 279 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_OSEN); 280 pos += RSN_SELECTOR_LEN; 281 282 *len = pos - len - 1; 283 284 WPA_ASSERT((size_t) (pos - wpa_ie) <= wpa_ie_len); 285 286 return pos - wpa_ie; 287} 288#endif /* CONFIG_HS20 */ 289 290 291/** 292 * wpa_gen_wpa_ie - Generate WPA/RSN IE based on current security policy 293 * @sm: Pointer to WPA state machine data from wpa_sm_init() 294 * @wpa_ie: Pointer to memory area for the generated WPA/RSN IE 295 * @wpa_ie_len: Maximum length of the generated WPA/RSN IE 296 * Returns: Length of the generated WPA/RSN IE or -1 on failure 297 */ 298int wpa_gen_wpa_ie(struct wpa_sm *sm, u8 *wpa_ie, size_t wpa_ie_len) 299{ 300 if (sm->proto == WPA_PROTO_RSN) 301 return wpa_gen_wpa_ie_rsn(wpa_ie, wpa_ie_len, 302 sm->pairwise_cipher, 303 sm->group_cipher, 304 sm->key_mgmt, sm->mgmt_group_cipher, 305 sm); 306#ifdef CONFIG_HS20 307 else if (sm->proto == WPA_PROTO_OSEN) 308 return wpa_gen_wpa_ie_osen(wpa_ie, wpa_ie_len, 309 sm->pairwise_cipher, 310 sm->group_cipher, 311 sm->key_mgmt); 312#endif /* CONFIG_HS20 */ 313 else 314 return wpa_gen_wpa_ie_wpa(wpa_ie, wpa_ie_len, 315 sm->pairwise_cipher, 316 sm->group_cipher, 317 sm->key_mgmt); 318} 319 320 321/** 322 * wpa_parse_vendor_specific - Parse Vendor Specific IEs 323 * @pos: Pointer to the IE header 324 * @end: Pointer to the end of the Key Data buffer 325 * @ie: Pointer to parsed IE data 326 * Returns: 0 on success, 1 if end mark is found, -1 on failure 327 */ 328static int wpa_parse_vendor_specific(const u8 *pos, const u8 *end, 329 struct wpa_eapol_ie_parse *ie) 330{ 331 unsigned int oui; 332 333 if (pos[1] < 4) { 334 wpa_printf(MSG_MSGDUMP, "Too short vendor specific IE ignored (len=%u)", 335 pos[1]); 336 return 1; 337 } 338 339 oui = WPA_GET_BE24(&pos[2]); 340 if (oui == OUI_MICROSOFT && pos[5] == WMM_OUI_TYPE && pos[1] > 4) { 341 if (pos[6] == WMM_OUI_SUBTYPE_INFORMATION_ELEMENT) { 342 ie->wmm = &pos[2]; 343 ie->wmm_len = pos[1]; 344 wpa_hexdump(MSG_DEBUG, "WPA: WMM IE", 345 ie->wmm, ie->wmm_len); 346 } else if (pos[6] == WMM_OUI_SUBTYPE_PARAMETER_ELEMENT) { 347 ie->wmm = &pos[2]; 348 ie->wmm_len = pos[1]; 349 wpa_hexdump(MSG_DEBUG, "WPA: WMM Parameter Element", 350 ie->wmm, ie->wmm_len); 351 } 352 } 353 return 0; 354} 355 356 357/** 358 * wpa_parse_generic - Parse EAPOL-Key Key Data Generic IEs 359 * @pos: Pointer to the IE header 360 * @end: Pointer to the end of the Key Data buffer 361 * @ie: Pointer to parsed IE data 362 * Returns: 0 on success, 1 if end mark is found, -1 on failure 363 */ 364static int wpa_parse_generic(const u8 *pos, const u8 *end, 365 struct wpa_eapol_ie_parse *ie) 366{ 367 if (pos[1] == 0) 368 return 1; 369 370 if (pos[1] >= 6 && 371 RSN_SELECTOR_GET(pos + 2) == WPA_OUI_TYPE && 372 pos[2 + WPA_SELECTOR_LEN] == 1 && 373 pos[2 + WPA_SELECTOR_LEN + 1] == 0) { 374 ie->wpa_ie = pos; 375 ie->wpa_ie_len = pos[1] + 2; 376 wpa_hexdump(MSG_DEBUG, "WPA: WPA IE in EAPOL-Key", 377 ie->wpa_ie, ie->wpa_ie_len); 378 return 0; 379 } 380 381 if (pos + 1 + RSN_SELECTOR_LEN < end && 382 pos[1] >= RSN_SELECTOR_LEN + PMKID_LEN && 383 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_PMKID) { 384 ie->pmkid = pos + 2 + RSN_SELECTOR_LEN; 385 wpa_hexdump(MSG_DEBUG, "WPA: PMKID in EAPOL-Key", 386 pos, pos[1] + 2); 387 return 0; 388 } 389 390 if (pos[1] > RSN_SELECTOR_LEN + 2 && 391 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_GROUPKEY) { 392 ie->gtk = pos + 2 + RSN_SELECTOR_LEN; 393 ie->gtk_len = pos[1] - RSN_SELECTOR_LEN; 394 wpa_hexdump_key(MSG_DEBUG, "WPA: GTK in EAPOL-Key", 395 pos, pos[1] + 2); 396 return 0; 397 } 398 399 if (pos[1] > RSN_SELECTOR_LEN + 2 && 400 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_MAC_ADDR) { 401 ie->mac_addr = pos + 2 + RSN_SELECTOR_LEN; 402 ie->mac_addr_len = pos[1] - RSN_SELECTOR_LEN; 403 wpa_hexdump(MSG_DEBUG, "WPA: MAC Address in EAPOL-Key", 404 pos, pos[1] + 2); 405 return 0; 406 } 407 408#ifdef CONFIG_PEERKEY 409 if (pos[1] > RSN_SELECTOR_LEN + 2 && 410 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_SMK) { 411 ie->smk = pos + 2 + RSN_SELECTOR_LEN; 412 ie->smk_len = pos[1] - RSN_SELECTOR_LEN; 413 wpa_hexdump_key(MSG_DEBUG, "WPA: SMK in EAPOL-Key", 414 pos, pos[1] + 2); 415 return 0; 416 } 417 418 if (pos[1] > RSN_SELECTOR_LEN + 2 && 419 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_NONCE) { 420 ie->nonce = pos + 2 + RSN_SELECTOR_LEN; 421 ie->nonce_len = pos[1] - RSN_SELECTOR_LEN; 422 wpa_hexdump(MSG_DEBUG, "WPA: Nonce in EAPOL-Key", 423 pos, pos[1] + 2); 424 return 0; 425 } 426 427 if (pos[1] > RSN_SELECTOR_LEN + 2 && 428 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_LIFETIME) { 429 ie->lifetime = pos + 2 + RSN_SELECTOR_LEN; 430 ie->lifetime_len = pos[1] - RSN_SELECTOR_LEN; 431 wpa_hexdump(MSG_DEBUG, "WPA: Lifetime in EAPOL-Key", 432 pos, pos[1] + 2); 433 return 0; 434 } 435 436 if (pos[1] > RSN_SELECTOR_LEN + 2 && 437 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_ERROR) { 438 ie->error = pos + 2 + RSN_SELECTOR_LEN; 439 ie->error_len = pos[1] - RSN_SELECTOR_LEN; 440 wpa_hexdump(MSG_DEBUG, "WPA: Error in EAPOL-Key", 441 pos, pos[1] + 2); 442 return 0; 443 } 444#endif /* CONFIG_PEERKEY */ 445 446#ifdef CONFIG_IEEE80211W 447 if (pos[1] > RSN_SELECTOR_LEN + 2 && 448 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_IGTK) { 449 ie->igtk = pos + 2 + RSN_SELECTOR_LEN; 450 ie->igtk_len = pos[1] - RSN_SELECTOR_LEN; 451 wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK in EAPOL-Key", 452 pos, pos[1] + 2); 453 return 0; 454 } 455#endif /* CONFIG_IEEE80211W */ 456 457#ifdef CONFIG_P2P 458 if (pos[1] >= RSN_SELECTOR_LEN + 1 && 459 RSN_SELECTOR_GET(pos + 2) == WFA_KEY_DATA_IP_ADDR_REQ) { 460 ie->ip_addr_req = pos + 2 + RSN_SELECTOR_LEN; 461 wpa_hexdump(MSG_DEBUG, "WPA: IP Address Request in EAPOL-Key", 462 ie->ip_addr_req, pos[1] - RSN_SELECTOR_LEN); 463 return 0; 464 } 465 466 if (pos[1] >= RSN_SELECTOR_LEN + 3 * 4 && 467 RSN_SELECTOR_GET(pos + 2) == WFA_KEY_DATA_IP_ADDR_ALLOC) { 468 ie->ip_addr_alloc = pos + 2 + RSN_SELECTOR_LEN; 469 wpa_hexdump(MSG_DEBUG, 470 "WPA: IP Address Allocation in EAPOL-Key", 471 ie->ip_addr_alloc, pos[1] - RSN_SELECTOR_LEN); 472 return 0; 473 } 474#endif /* CONFIG_P2P */ 475 476 return 0; 477} 478 479 480/** 481 * wpa_supplicant_parse_ies - Parse EAPOL-Key Key Data IEs 482 * @buf: Pointer to the Key Data buffer 483 * @len: Key Data Length 484 * @ie: Pointer to parsed IE data 485 * Returns: 0 on success, -1 on failure 486 */ 487int wpa_supplicant_parse_ies(const u8 *buf, size_t len, 488 struct wpa_eapol_ie_parse *ie) 489{ 490 const u8 *pos, *end; 491 int ret = 0; 492 493 os_memset(ie, 0, sizeof(*ie)); 494 for (pos = buf, end = pos + len; pos + 1 < end; pos += 2 + pos[1]) { 495 if (pos[0] == 0xdd && 496 ((pos == buf + len - 1) || pos[1] == 0)) { 497 /* Ignore padding */ 498 break; 499 } 500 if (pos + 2 + pos[1] > end) { 501 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key Key Data " 502 "underflow (ie=%d len=%d pos=%d)", 503 pos[0], pos[1], (int) (pos - buf)); 504 wpa_hexdump_key(MSG_DEBUG, "WPA: Key Data", 505 buf, len); 506 ret = -1; 507 break; 508 } 509 if (*pos == WLAN_EID_RSN) { 510 ie->rsn_ie = pos; 511 ie->rsn_ie_len = pos[1] + 2; 512 wpa_hexdump(MSG_DEBUG, "WPA: RSN IE in EAPOL-Key", 513 ie->rsn_ie, ie->rsn_ie_len); 514 } else if (*pos == WLAN_EID_MOBILITY_DOMAIN && 515 pos[1] >= sizeof(struct rsn_mdie)) { 516 ie->mdie = pos; 517 ie->mdie_len = pos[1] + 2; 518 wpa_hexdump(MSG_DEBUG, "WPA: MDIE in EAPOL-Key", 519 ie->mdie, ie->mdie_len); 520 } else if (*pos == WLAN_EID_FAST_BSS_TRANSITION && 521 pos[1] >= sizeof(struct rsn_ftie)) { 522 ie->ftie = pos; 523 ie->ftie_len = pos[1] + 2; 524 wpa_hexdump(MSG_DEBUG, "WPA: FTIE in EAPOL-Key", 525 ie->ftie, ie->ftie_len); 526 } else if (*pos == WLAN_EID_TIMEOUT_INTERVAL && pos[1] >= 5) { 527 if (pos[2] == WLAN_TIMEOUT_REASSOC_DEADLINE) { 528 ie->reassoc_deadline = pos; 529 wpa_hexdump(MSG_DEBUG, "WPA: Reassoc Deadline " 530 "in EAPOL-Key", 531 ie->reassoc_deadline, pos[1] + 2); 532 } else if (pos[2] == WLAN_TIMEOUT_KEY_LIFETIME) { 533 ie->key_lifetime = pos; 534 wpa_hexdump(MSG_DEBUG, "WPA: KeyLifetime " 535 "in EAPOL-Key", 536 ie->key_lifetime, pos[1] + 2); 537 } else { 538 wpa_hexdump(MSG_DEBUG, "WPA: Unrecognized " 539 "EAPOL-Key Key Data IE", 540 pos, 2 + pos[1]); 541 } 542 } else if (*pos == WLAN_EID_LINK_ID) { 543 if (pos[1] >= 18) { 544 ie->lnkid = pos; 545 ie->lnkid_len = pos[1] + 2; 546 } 547 } else if (*pos == WLAN_EID_EXT_CAPAB) { 548 ie->ext_capab = pos; 549 ie->ext_capab_len = pos[1] + 2; 550 } else if (*pos == WLAN_EID_SUPP_RATES) { 551 ie->supp_rates = pos; 552 ie->supp_rates_len = pos[1] + 2; 553 } else if (*pos == WLAN_EID_EXT_SUPP_RATES) { 554 ie->ext_supp_rates = pos; 555 ie->ext_supp_rates_len = pos[1] + 2; 556 } else if (*pos == WLAN_EID_HT_CAP && 557 pos[1] >= sizeof(struct ieee80211_ht_capabilities)) { 558 ie->ht_capabilities = pos + 2; 559 } else if (*pos == WLAN_EID_VHT_AID) { 560 if (pos[1] >= 2) 561 ie->aid = WPA_GET_LE16(pos + 2) & 0x3fff; 562 } else if (*pos == WLAN_EID_VHT_CAP && 563 pos[1] >= sizeof(struct ieee80211_vht_capabilities)) 564 { 565 ie->vht_capabilities = pos + 2; 566 } else if (*pos == WLAN_EID_QOS && pos[1] >= 1) { 567 ie->qosinfo = pos[2]; 568 } else if (*pos == WLAN_EID_SUPPORTED_CHANNELS) { 569 ie->supp_channels = pos + 2; 570 ie->supp_channels_len = pos[1]; 571 } else if (*pos == WLAN_EID_SUPPORTED_OPERATING_CLASSES) { 572 /* 573 * The value of the Length field of the Supported 574 * Operating Classes element is between 2 and 253. 575 * Silently skip invalid elements to avoid interop 576 * issues when trying to use the value. 577 */ 578 if (pos[1] >= 2 && pos[1] <= 253) { 579 ie->supp_oper_classes = pos + 2; 580 ie->supp_oper_classes_len = pos[1]; 581 } 582 } else if (*pos == WLAN_EID_VENDOR_SPECIFIC) { 583 ret = wpa_parse_generic(pos, end, ie); 584 if (ret < 0) 585 break; 586 if (ret > 0) { 587 ret = 0; 588 break; 589 } 590 591 ret = wpa_parse_vendor_specific(pos, end, ie); 592 if (ret < 0) 593 break; 594 if (ret > 0) { 595 ret = 0; 596 break; 597 } 598 } else { 599 wpa_hexdump(MSG_DEBUG, "WPA: Unrecognized EAPOL-Key " 600 "Key Data IE", pos, 2 + pos[1]); 601 } 602 } 603 604 return ret; 605} 606