1 /* 2 * wpa_supplicant - WPA/RSN IE and KDE processing 3 * Copyright (c) 2003-2015, Jouni Malinen <j (at) 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 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 41 static 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 } 106 107 108 static 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 #ifdef CONFIG_FILS 184 } else if (key_mgmt & WPA_KEY_MGMT_FILS_SHA256) { 185 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FILS_SHA256); 186 } else if (key_mgmt & WPA_KEY_MGMT_FILS_SHA384) { 187 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FILS_SHA384); 188 #ifdef CONFIG_IEEE80211R 189 } else if (key_mgmt & WPA_KEY_MGMT_FT_FILS_SHA256) { 190 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_FILS_SHA256); 191 } else if (key_mgmt & WPA_KEY_MGMT_FT_FILS_SHA384) { 192 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_FILS_SHA384); 193 #endif /* CONFIG_IEEE80211R */ 194 #endif /* CONFIG_FILS */ 195 #ifdef CONFIG_OWE 196 } else if (key_mgmt & WPA_KEY_MGMT_OWE) { 197 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_OWE); 198 #endif /* CONFIG_OWE */ 199 #ifdef CONFIG_DPP 200 } else if (key_mgmt & WPA_KEY_MGMT_DPP) { 201 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_DPP); 202 #endif /* CONFIG_DPP */ 203 } else { 204 wpa_printf(MSG_WARNING, "Invalid key management type (%d).", 205 key_mgmt); 206 return -1; 207 } 208 pos += RSN_SELECTOR_LEN; 209 210 /* RSN Capabilities */ 211 capab = 0; 212 #ifdef CONFIG_IEEE80211W 213 if (sm->mfp) 214 capab |= WPA_CAPABILITY_MFPC; 215 if (sm->mfp == 2) 216 capab |= WPA_CAPABILITY_MFPR; 217 #endif /* CONFIG_IEEE80211W */ 218 WPA_PUT_LE16(pos, capab); 219 pos += 2; 220 221 if (sm->cur_pmksa) { 222 /* PMKID Count (2 octets, little endian) */ 223 *pos++ = 1; 224 *pos++ = 0; 225 /* PMKID */ 226 os_memcpy(pos, sm->cur_pmksa->pmkid, PMKID_LEN); 227 pos += PMKID_LEN; 228 } 229 230 #ifdef CONFIG_IEEE80211W 231 if (wpa_cipher_valid_mgmt_group(mgmt_group_cipher)) { 232 if (!sm->cur_pmksa) { 233 /* PMKID Count */ 234 WPA_PUT_LE16(pos, 0); 235 pos += 2; 236 } 237 238 /* Management Group Cipher Suite */ 239 RSN_SELECTOR_PUT(pos, wpa_cipher_to_suite(WPA_PROTO_RSN, 240 mgmt_group_cipher)); 241 pos += RSN_SELECTOR_LEN; 242 } 243 #endif /* CONFIG_IEEE80211W */ 244 245 hdr->len = (pos - rsn_ie) - 2; 246 247 WPA_ASSERT((size_t) (pos - rsn_ie) <= rsn_ie_len); 248 249 return pos - rsn_ie; 250 } 251 252 253 #ifdef CONFIG_HS20 254 static int wpa_gen_wpa_ie_osen(u8 *wpa_ie, size_t wpa_ie_len, 255 int pairwise_cipher, int group_cipher, 256 int key_mgmt) 257 { 258 u8 *pos, *len; 259 u32 suite; 260 261 if (wpa_ie_len < 2 + 4 + RSN_SELECTOR_LEN + 262 2 + RSN_SELECTOR_LEN + 2 + RSN_SELECTOR_LEN) 263 return -1; 264 265 pos = wpa_ie; 266 *pos++ = WLAN_EID_VENDOR_SPECIFIC; 267 len = pos++; /* to be filled */ 268 WPA_PUT_BE24(pos, OUI_WFA); 269 pos += 3; 270 *pos++ = HS20_OSEN_OUI_TYPE; 271 272 /* Group Data Cipher Suite */ 273 suite = wpa_cipher_to_suite(WPA_PROTO_RSN, group_cipher); 274 if (suite == 0) { 275 wpa_printf(MSG_WARNING, "Invalid group cipher (%d).", 276 group_cipher); 277 return -1; 278 } 279 RSN_SELECTOR_PUT(pos, suite); 280 pos += RSN_SELECTOR_LEN; 281 282 /* Pairwise Cipher Suite Count and List */ 283 WPA_PUT_LE16(pos, 1); 284 pos += 2; 285 suite = wpa_cipher_to_suite(WPA_PROTO_RSN, pairwise_cipher); 286 if (suite == 0 || 287 (!wpa_cipher_valid_pairwise(pairwise_cipher) && 288 pairwise_cipher != WPA_CIPHER_NONE)) { 289 wpa_printf(MSG_WARNING, "Invalid pairwise cipher (%d).", 290 pairwise_cipher); 291 return -1; 292 } 293 RSN_SELECTOR_PUT(pos, suite); 294 pos += RSN_SELECTOR_LEN; 295 296 /* AKM Suite Count and List */ 297 WPA_PUT_LE16(pos, 1); 298 pos += 2; 299 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_OSEN); 300 pos += RSN_SELECTOR_LEN; 301 302 *len = pos - len - 1; 303 304 WPA_ASSERT((size_t) (pos - wpa_ie) <= wpa_ie_len); 305 306 return pos - wpa_ie; 307 } 308 #endif /* CONFIG_HS20 */ 309 310 311 /** 312 * wpa_gen_wpa_ie - Generate WPA/RSN IE based on current security policy 313 * @sm: Pointer to WPA state machine data from wpa_sm_init() 314 * @wpa_ie: Pointer to memory area for the generated WPA/RSN IE 315 * @wpa_ie_len: Maximum length of the generated WPA/RSN IE 316 * Returns: Length of the generated WPA/RSN IE or -1 on failure 317 */ 318 int wpa_gen_wpa_ie(struct wpa_sm *sm, u8 *wpa_ie, size_t wpa_ie_len) 319 { 320 if (sm->proto == WPA_PROTO_RSN) 321 return wpa_gen_wpa_ie_rsn(wpa_ie, wpa_ie_len, 322 sm->pairwise_cipher, 323 sm->group_cipher, 324 sm->key_mgmt, sm->mgmt_group_cipher, 325 sm); 326 #ifdef CONFIG_HS20 327 else if (sm->proto == WPA_PROTO_OSEN) 328 return wpa_gen_wpa_ie_osen(wpa_ie, wpa_ie_len, 329 sm->pairwise_cipher, 330 sm->group_cipher, 331 sm->key_mgmt); 332 #endif /* CONFIG_HS20 */ 333 else 334 return wpa_gen_wpa_ie_wpa(wpa_ie, wpa_ie_len, 335 sm->pairwise_cipher, 336 sm->group_cipher, 337 sm->key_mgmt); 338 } 339 340 341 /** 342 * wpa_parse_vendor_specific - Parse Vendor Specific IEs 343 * @pos: Pointer to the IE header 344 * @end: Pointer to the end of the Key Data buffer 345 * @ie: Pointer to parsed IE data 346 * Returns: 0 on success, 1 if end mark is found, -1 on failure 347 */ 348 static int wpa_parse_vendor_specific(const u8 *pos, const u8 *end, 349 struct wpa_eapol_ie_parse *ie) 350 { 351 unsigned int oui; 352 353 if (pos[1] < 4) { 354 wpa_printf(MSG_MSGDUMP, "Too short vendor specific IE ignored (len=%u)", 355 pos[1]); 356 return 1; 357 } 358 359 oui = WPA_GET_BE24(&pos[2]); 360 if (oui == OUI_MICROSOFT && pos[5] == WMM_OUI_TYPE && pos[1] > 4) { 361 if (pos[6] == WMM_OUI_SUBTYPE_INFORMATION_ELEMENT) { 362 ie->wmm = &pos[2]; 363 ie->wmm_len = pos[1]; 364 wpa_hexdump(MSG_DEBUG, "WPA: WMM IE", 365 ie->wmm, ie->wmm_len); 366 } else if (pos[6] == WMM_OUI_SUBTYPE_PARAMETER_ELEMENT) { 367 ie->wmm = &pos[2]; 368 ie->wmm_len = pos[1]; 369 wpa_hexdump(MSG_DEBUG, "WPA: WMM Parameter Element", 370 ie->wmm, ie->wmm_len); 371 } 372 } 373 return 0; 374 } 375 376 377 /** 378 * wpa_parse_generic - Parse EAPOL-Key Key Data Generic IEs 379 * @pos: Pointer to the IE header 380 * @end: Pointer to the end of the Key Data buffer 381 * @ie: Pointer to parsed IE data 382 * Returns: 0 on success, 1 if end mark is found, -1 on failure 383 */ 384 static int wpa_parse_generic(const u8 *pos, const u8 *end, 385 struct wpa_eapol_ie_parse *ie) 386 { 387 if (pos[1] == 0) 388 return 1; 389 390 if (pos[1] >= 6 && 391 RSN_SELECTOR_GET(pos + 2) == WPA_OUI_TYPE && 392 pos[2 + WPA_SELECTOR_LEN] == 1 && 393 pos[2 + WPA_SELECTOR_LEN + 1] == 0) { 394 ie->wpa_ie = pos; 395 ie->wpa_ie_len = pos[1] + 2; 396 wpa_hexdump(MSG_DEBUG, "WPA: WPA IE in EAPOL-Key", 397 ie->wpa_ie, ie->wpa_ie_len); 398 return 0; 399 } 400 401 if (1 + RSN_SELECTOR_LEN < end - pos && 402 pos[1] >= RSN_SELECTOR_LEN + PMKID_LEN && 403 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_PMKID) { 404 ie->pmkid = pos + 2 + RSN_SELECTOR_LEN; 405 wpa_hexdump(MSG_DEBUG, "WPA: PMKID in EAPOL-Key", 406 pos, pos[1] + 2); 407 return 0; 408 } 409 410 if (pos[1] > RSN_SELECTOR_LEN + 2 && 411 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_GROUPKEY) { 412 ie->gtk = pos + 2 + RSN_SELECTOR_LEN; 413 ie->gtk_len = pos[1] - RSN_SELECTOR_LEN; 414 wpa_hexdump_key(MSG_DEBUG, "WPA: GTK in EAPOL-Key", 415 pos, pos[1] + 2); 416 return 0; 417 } 418 419 if (pos[1] > RSN_SELECTOR_LEN + 2 && 420 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_MAC_ADDR) { 421 ie->mac_addr = pos + 2 + RSN_SELECTOR_LEN; 422 ie->mac_addr_len = pos[1] - RSN_SELECTOR_LEN; 423 wpa_hexdump(MSG_DEBUG, "WPA: MAC Address in EAPOL-Key", 424 pos, pos[1] + 2); 425 return 0; 426 } 427 428 #ifdef CONFIG_IEEE80211W 429 if (pos[1] > RSN_SELECTOR_LEN + 2 && 430 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_IGTK) { 431 ie->igtk = pos + 2 + RSN_SELECTOR_LEN; 432 ie->igtk_len = pos[1] - RSN_SELECTOR_LEN; 433 wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK in EAPOL-Key", 434 pos, pos[1] + 2); 435 return 0; 436 } 437 #endif /* CONFIG_IEEE80211W */ 438 439 #ifdef CONFIG_P2P 440 if (pos[1] >= RSN_SELECTOR_LEN + 1 && 441 RSN_SELECTOR_GET(pos + 2) == WFA_KEY_DATA_IP_ADDR_REQ) { 442 ie->ip_addr_req = pos + 2 + RSN_SELECTOR_LEN; 443 wpa_hexdump(MSG_DEBUG, "WPA: IP Address Request in EAPOL-Key", 444 ie->ip_addr_req, pos[1] - RSN_SELECTOR_LEN); 445 return 0; 446 } 447 448 if (pos[1] >= RSN_SELECTOR_LEN + 3 * 4 && 449 RSN_SELECTOR_GET(pos + 2) == WFA_KEY_DATA_IP_ADDR_ALLOC) { 450 ie->ip_addr_alloc = pos + 2 + RSN_SELECTOR_LEN; 451 wpa_hexdump(MSG_DEBUG, 452 "WPA: IP Address Allocation in EAPOL-Key", 453 ie->ip_addr_alloc, pos[1] - RSN_SELECTOR_LEN); 454 return 0; 455 } 456 #endif /* CONFIG_P2P */ 457 458 return 0; 459 } 460 461 462 /** 463 * wpa_supplicant_parse_ies - Parse EAPOL-Key Key Data IEs 464 * @buf: Pointer to the Key Data buffer 465 * @len: Key Data Length 466 * @ie: Pointer to parsed IE data 467 * Returns: 0 on success, -1 on failure 468 */ 469 int wpa_supplicant_parse_ies(const u8 *buf, size_t len, 470 struct wpa_eapol_ie_parse *ie) 471 { 472 const u8 *pos, *end; 473 int ret = 0; 474 475 os_memset(ie, 0, sizeof(*ie)); 476 for (pos = buf, end = pos + len; end - pos > 1; pos += 2 + pos[1]) { 477 if (pos[0] == 0xdd && 478 ((pos == buf + len - 1) || pos[1] == 0)) { 479 /* Ignore padding */ 480 break; 481 } 482 if (2 + pos[1] > end - pos) { 483 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key Key Data " 484 "underflow (ie=%d len=%d pos=%d)", 485 pos[0], pos[1], (int) (pos - buf)); 486 wpa_hexdump_key(MSG_DEBUG, "WPA: Key Data", 487 buf, len); 488 ret = -1; 489 break; 490 } 491 if (*pos == WLAN_EID_RSN) { 492 ie->rsn_ie = pos; 493 ie->rsn_ie_len = pos[1] + 2; 494 wpa_hexdump(MSG_DEBUG, "WPA: RSN IE in EAPOL-Key", 495 ie->rsn_ie, ie->rsn_ie_len); 496 } else if (*pos == WLAN_EID_MOBILITY_DOMAIN && 497 pos[1] >= sizeof(struct rsn_mdie)) { 498 ie->mdie = pos; 499 ie->mdie_len = pos[1] + 2; 500 wpa_hexdump(MSG_DEBUG, "WPA: MDIE in EAPOL-Key", 501 ie->mdie, ie->mdie_len); 502 } else if (*pos == WLAN_EID_FAST_BSS_TRANSITION && 503 pos[1] >= sizeof(struct rsn_ftie)) { 504 ie->ftie = pos; 505 ie->ftie_len = pos[1] + 2; 506 wpa_hexdump(MSG_DEBUG, "WPA: FTIE in EAPOL-Key", 507 ie->ftie, ie->ftie_len); 508 } else if (*pos == WLAN_EID_TIMEOUT_INTERVAL && pos[1] >= 5) { 509 if (pos[2] == WLAN_TIMEOUT_REASSOC_DEADLINE) { 510 ie->reassoc_deadline = pos; 511 wpa_hexdump(MSG_DEBUG, "WPA: Reassoc Deadline " 512 "in EAPOL-Key", 513 ie->reassoc_deadline, pos[1] + 2); 514 } else if (pos[2] == WLAN_TIMEOUT_KEY_LIFETIME) { 515 ie->key_lifetime = pos; 516 wpa_hexdump(MSG_DEBUG, "WPA: KeyLifetime " 517 "in EAPOL-Key", 518 ie->key_lifetime, pos[1] + 2); 519 } else { 520 wpa_hexdump(MSG_DEBUG, "WPA: Unrecognized " 521 "EAPOL-Key Key Data IE", 522 pos, 2 + pos[1]); 523 } 524 } else if (*pos == WLAN_EID_LINK_ID) { 525 if (pos[1] >= 18) { 526 ie->lnkid = pos; 527 ie->lnkid_len = pos[1] + 2; 528 } 529 } else if (*pos == WLAN_EID_EXT_CAPAB) { 530 ie->ext_capab = pos; 531 ie->ext_capab_len = pos[1] + 2; 532 } else if (*pos == WLAN_EID_SUPP_RATES) { 533 ie->supp_rates = pos; 534 ie->supp_rates_len = pos[1] + 2; 535 } else if (*pos == WLAN_EID_EXT_SUPP_RATES) { 536 ie->ext_supp_rates = pos; 537 ie->ext_supp_rates_len = pos[1] + 2; 538 } else if (*pos == WLAN_EID_HT_CAP && 539 pos[1] >= sizeof(struct ieee80211_ht_capabilities)) { 540 ie->ht_capabilities = pos + 2; 541 } else if (*pos == WLAN_EID_VHT_AID) { 542 if (pos[1] >= 2) 543 ie->aid = WPA_GET_LE16(pos + 2) & 0x3fff; 544 } else if (*pos == WLAN_EID_VHT_CAP && 545 pos[1] >= sizeof(struct ieee80211_vht_capabilities)) 546 { 547 ie->vht_capabilities = pos + 2; 548 } else if (*pos == WLAN_EID_QOS && pos[1] >= 1) { 549 ie->qosinfo = pos[2]; 550 } else if (*pos == WLAN_EID_SUPPORTED_CHANNELS) { 551 ie->supp_channels = pos + 2; 552 ie->supp_channels_len = pos[1]; 553 } else if (*pos == WLAN_EID_SUPPORTED_OPERATING_CLASSES) { 554 /* 555 * The value of the Length field of the Supported 556 * Operating Classes element is between 2 and 253. 557 * Silently skip invalid elements to avoid interop 558 * issues when trying to use the value. 559 */ 560 if (pos[1] >= 2 && pos[1] <= 253) { 561 ie->supp_oper_classes = pos + 2; 562 ie->supp_oper_classes_len = pos[1]; 563 } 564 } else if (*pos == WLAN_EID_VENDOR_SPECIFIC) { 565 ret = wpa_parse_generic(pos, end, ie); 566 if (ret < 0) 567 break; 568 if (ret > 0) { 569 ret = 0; 570 break; 571 } 572 573 ret = wpa_parse_vendor_specific(pos, end, ie); 574 if (ret < 0) 575 break; 576 if (ret > 0) { 577 ret = 0; 578 break; 579 } 580 } else { 581 wpa_hexdump(MSG_DEBUG, "WPA: Unrecognized EAPOL-Key " 582 "Key Data IE", pos, 2 + pos[1]); 583 } 584 } 585 586 return ret; 587 } 588
