1 /* 2 * wpa_supplicant - WPA/RSN IE and KDE processing 3 * Copyright (c) 2003-2018, 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 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 #ifdef CONFIG_SHA384 165 } else if (key_mgmt == WPA_KEY_MGMT_FT_IEEE8021X_SHA384) { 166 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_802_1X_SHA384); 167 #endif /* CONFIG_SHA384 */ 168 } else if (key_mgmt == WPA_KEY_MGMT_FT_PSK) { 169 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_PSK); 170 #endif /* CONFIG_IEEE80211R */ 171 #ifdef CONFIG_IEEE80211W 172 } else if (key_mgmt == WPA_KEY_MGMT_IEEE8021X_SHA256) { 173 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_802_1X_SHA256); 174 } else if (key_mgmt == WPA_KEY_MGMT_PSK_SHA256) { 175 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_PSK_SHA256); 176 #endif /* CONFIG_IEEE80211W */ 177 #ifdef CONFIG_SAE 178 } else if (key_mgmt == WPA_KEY_MGMT_SAE) { 179 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_SAE); 180 } else if (key_mgmt == WPA_KEY_MGMT_FT_SAE) { 181 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_SAE); 182 #endif /* CONFIG_SAE */ 183 } else if (key_mgmt == WPA_KEY_MGMT_IEEE8021X_SUITE_B_192) { 184 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_802_1X_SUITE_B_192); 185 } else if (key_mgmt == WPA_KEY_MGMT_IEEE8021X_SUITE_B) { 186 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_802_1X_SUITE_B); 187 #ifdef CONFIG_FILS 188 } else if (key_mgmt & WPA_KEY_MGMT_FILS_SHA256) { 189 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FILS_SHA256); 190 } else if (key_mgmt & WPA_KEY_MGMT_FILS_SHA384) { 191 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FILS_SHA384); 192 #ifdef CONFIG_IEEE80211R 193 } else if (key_mgmt & WPA_KEY_MGMT_FT_FILS_SHA256) { 194 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_FILS_SHA256); 195 } else if (key_mgmt & WPA_KEY_MGMT_FT_FILS_SHA384) { 196 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_FILS_SHA384); 197 #endif /* CONFIG_IEEE80211R */ 198 #endif /* CONFIG_FILS */ 199 #ifdef CONFIG_OWE 200 } else if (key_mgmt & WPA_KEY_MGMT_OWE) { 201 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_OWE); 202 #endif /* CONFIG_OWE */ 203 #ifdef CONFIG_DPP 204 } else if (key_mgmt & WPA_KEY_MGMT_DPP) { 205 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_DPP); 206 #endif /* CONFIG_DPP */ 207 #ifdef CONFIG_HS20 208 } else if (key_mgmt & WPA_KEY_MGMT_OSEN) { 209 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_OSEN); 210 #endif /* CONFIG_HS20 */ 211 } else { 212 wpa_printf(MSG_WARNING, "Invalid key management type (%d).", 213 key_mgmt); 214 return -1; 215 } 216 pos += RSN_SELECTOR_LEN; 217 218 /* RSN Capabilities */ 219 capab = 0; 220 #ifdef CONFIG_IEEE80211W 221 if (sm->mfp) 222 capab |= WPA_CAPABILITY_MFPC; 223 if (sm->mfp == 2) 224 capab |= WPA_CAPABILITY_MFPR; 225 #endif /* CONFIG_IEEE80211W */ 226 WPA_PUT_LE16(pos, capab); 227 pos += 2; 228 229 if (sm->cur_pmksa) { 230 /* PMKID Count (2 octets, little endian) */ 231 *pos++ = 1; 232 *pos++ = 0; 233 /* PMKID */ 234 os_memcpy(pos, sm->cur_pmksa->pmkid, PMKID_LEN); 235 pos += PMKID_LEN; 236 } 237 238 #ifdef CONFIG_IEEE80211W 239 if (wpa_cipher_valid_mgmt_group(mgmt_group_cipher)) { 240 if (!sm->cur_pmksa) { 241 /* PMKID Count */ 242 WPA_PUT_LE16(pos, 0); 243 pos += 2; 244 } 245 246 /* Management Group Cipher Suite */ 247 RSN_SELECTOR_PUT(pos, wpa_cipher_to_suite(WPA_PROTO_RSN, 248 mgmt_group_cipher)); 249 pos += RSN_SELECTOR_LEN; 250 } 251 #endif /* CONFIG_IEEE80211W */ 252 253 hdr->len = (pos - rsn_ie) - 2; 254 255 WPA_ASSERT((size_t) (pos - rsn_ie) <= rsn_ie_len); 256 257 return pos - rsn_ie; 258 } 259 260 261 #ifdef CONFIG_HS20 262 static int wpa_gen_wpa_ie_osen(u8 *wpa_ie, size_t wpa_ie_len, 263 int pairwise_cipher, int group_cipher, 264 int key_mgmt) 265 { 266 u8 *pos, *len; 267 u32 suite; 268 269 if (wpa_ie_len < 2 + 4 + RSN_SELECTOR_LEN + 270 2 + RSN_SELECTOR_LEN + 2 + RSN_SELECTOR_LEN) 271 return -1; 272 273 pos = wpa_ie; 274 *pos++ = WLAN_EID_VENDOR_SPECIFIC; 275 len = pos++; /* to be filled */ 276 WPA_PUT_BE24(pos, OUI_WFA); 277 pos += 3; 278 *pos++ = HS20_OSEN_OUI_TYPE; 279 280 /* Group Data Cipher Suite */ 281 suite = wpa_cipher_to_suite(WPA_PROTO_RSN, group_cipher); 282 if (suite == 0) { 283 wpa_printf(MSG_WARNING, "Invalid group cipher (%d).", 284 group_cipher); 285 return -1; 286 } 287 RSN_SELECTOR_PUT(pos, suite); 288 pos += RSN_SELECTOR_LEN; 289 290 /* Pairwise Cipher Suite Count and List */ 291 WPA_PUT_LE16(pos, 1); 292 pos += 2; 293 suite = wpa_cipher_to_suite(WPA_PROTO_RSN, pairwise_cipher); 294 if (suite == 0 || 295 (!wpa_cipher_valid_pairwise(pairwise_cipher) && 296 pairwise_cipher != WPA_CIPHER_NONE)) { 297 wpa_printf(MSG_WARNING, "Invalid pairwise cipher (%d).", 298 pairwise_cipher); 299 return -1; 300 } 301 RSN_SELECTOR_PUT(pos, suite); 302 pos += RSN_SELECTOR_LEN; 303 304 /* AKM Suite Count and List */ 305 WPA_PUT_LE16(pos, 1); 306 pos += 2; 307 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_OSEN); 308 pos += RSN_SELECTOR_LEN; 309 310 *len = pos - len - 1; 311 312 WPA_ASSERT((size_t) (pos - wpa_ie) <= wpa_ie_len); 313 314 return pos - wpa_ie; 315 } 316 #endif /* CONFIG_HS20 */ 317 318 319 /** 320 * wpa_gen_wpa_ie - Generate WPA/RSN IE based on current security policy 321 * @sm: Pointer to WPA state machine data from wpa_sm_init() 322 * @wpa_ie: Pointer to memory area for the generated WPA/RSN IE 323 * @wpa_ie_len: Maximum length of the generated WPA/RSN IE 324 * Returns: Length of the generated WPA/RSN IE or -1 on failure 325 */ 326 int wpa_gen_wpa_ie(struct wpa_sm *sm, u8 *wpa_ie, size_t wpa_ie_len) 327 { 328 if (sm->proto == WPA_PROTO_RSN) 329 return wpa_gen_wpa_ie_rsn(wpa_ie, wpa_ie_len, 330 sm->pairwise_cipher, 331 sm->group_cipher, 332 sm->key_mgmt, sm->mgmt_group_cipher, 333 sm); 334 #ifdef CONFIG_HS20 335 else if (sm->proto == WPA_PROTO_OSEN) 336 return wpa_gen_wpa_ie_osen(wpa_ie, wpa_ie_len, 337 sm->pairwise_cipher, 338 sm->group_cipher, 339 sm->key_mgmt); 340 #endif /* CONFIG_HS20 */ 341 else 342 return wpa_gen_wpa_ie_wpa(wpa_ie, wpa_ie_len, 343 sm->pairwise_cipher, 344 sm->group_cipher, 345 sm->key_mgmt); 346 } 347 348 349 /** 350 * wpa_parse_vendor_specific - Parse Vendor Specific IEs 351 * @pos: Pointer to the IE header 352 * @end: Pointer to the end of the Key Data buffer 353 * @ie: Pointer to parsed IE data 354 * Returns: 0 on success, 1 if end mark is found, -1 on failure 355 */ 356 static int wpa_parse_vendor_specific(const u8 *pos, const u8 *end, 357 struct wpa_eapol_ie_parse *ie) 358 { 359 unsigned int oui; 360 361 if (pos[1] < 4) { 362 wpa_printf(MSG_MSGDUMP, "Too short vendor specific IE ignored (len=%u)", 363 pos[1]); 364 return 1; 365 } 366 367 oui = WPA_GET_BE24(&pos[2]); 368 if (oui == OUI_MICROSOFT && pos[5] == WMM_OUI_TYPE && pos[1] > 4) { 369 if (pos[6] == WMM_OUI_SUBTYPE_INFORMATION_ELEMENT) { 370 ie->wmm = &pos[2]; 371 ie->wmm_len = pos[1]; 372 wpa_hexdump(MSG_DEBUG, "WPA: WMM IE", 373 ie->wmm, ie->wmm_len); 374 } else if (pos[6] == WMM_OUI_SUBTYPE_PARAMETER_ELEMENT) { 375 ie->wmm = &pos[2]; 376 ie->wmm_len = pos[1]; 377 wpa_hexdump(MSG_DEBUG, "WPA: WMM Parameter Element", 378 ie->wmm, ie->wmm_len); 379 } 380 } 381 return 0; 382 } 383 384 385 /** 386 * wpa_parse_generic - Parse EAPOL-Key Key Data Generic IEs 387 * @pos: Pointer to the IE header 388 * @end: Pointer to the end of the Key Data buffer 389 * @ie: Pointer to parsed IE data 390 * Returns: 0 on success, 1 if end mark is found, -1 on failure 391 */ 392 static int wpa_parse_generic(const u8 *pos, const u8 *end, 393 struct wpa_eapol_ie_parse *ie) 394 { 395 if (pos[1] == 0) 396 return 1; 397 398 if (pos[1] >= 6 && 399 RSN_SELECTOR_GET(pos + 2) == WPA_OUI_TYPE && 400 pos[2 + WPA_SELECTOR_LEN] == 1 && 401 pos[2 + WPA_SELECTOR_LEN + 1] == 0) { 402 ie->wpa_ie = pos; 403 ie->wpa_ie_len = pos[1] + 2; 404 wpa_hexdump(MSG_DEBUG, "WPA: WPA IE in EAPOL-Key", 405 ie->wpa_ie, ie->wpa_ie_len); 406 return 0; 407 } 408 409 if (1 + RSN_SELECTOR_LEN < end - pos && 410 pos[1] >= RSN_SELECTOR_LEN + PMKID_LEN && 411 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_PMKID) { 412 ie->pmkid = pos + 2 + RSN_SELECTOR_LEN; 413 wpa_hexdump(MSG_DEBUG, "WPA: PMKID 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_GROUPKEY) { 420 ie->gtk = pos + 2 + RSN_SELECTOR_LEN; 421 ie->gtk_len = pos[1] - RSN_SELECTOR_LEN; 422 wpa_hexdump_key(MSG_DEBUG, "WPA: GTK 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_MAC_ADDR) { 429 ie->mac_addr = pos + 2 + RSN_SELECTOR_LEN; 430 ie->mac_addr_len = pos[1] - RSN_SELECTOR_LEN; 431 wpa_hexdump(MSG_DEBUG, "WPA: MAC Address in EAPOL-Key", 432 pos, pos[1] + 2); 433 return 0; 434 } 435 436 #ifdef CONFIG_IEEE80211W 437 if (pos[1] > RSN_SELECTOR_LEN + 2 && 438 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_IGTK) { 439 ie->igtk = pos + 2 + RSN_SELECTOR_LEN; 440 ie->igtk_len = pos[1] - RSN_SELECTOR_LEN; 441 wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK in EAPOL-Key", 442 pos, pos[1] + 2); 443 return 0; 444 } 445 #endif /* CONFIG_IEEE80211W */ 446 447 #ifdef CONFIG_P2P 448 if (pos[1] >= RSN_SELECTOR_LEN + 1 && 449 RSN_SELECTOR_GET(pos + 2) == WFA_KEY_DATA_IP_ADDR_REQ) { 450 ie->ip_addr_req = pos + 2 + RSN_SELECTOR_LEN; 451 wpa_hexdump(MSG_DEBUG, "WPA: IP Address Request in EAPOL-Key", 452 ie->ip_addr_req, pos[1] - RSN_SELECTOR_LEN); 453 return 0; 454 } 455 456 if (pos[1] >= RSN_SELECTOR_LEN + 3 * 4 && 457 RSN_SELECTOR_GET(pos + 2) == WFA_KEY_DATA_IP_ADDR_ALLOC) { 458 ie->ip_addr_alloc = pos + 2 + RSN_SELECTOR_LEN; 459 wpa_hexdump(MSG_DEBUG, 460 "WPA: IP Address Allocation in EAPOL-Key", 461 ie->ip_addr_alloc, pos[1] - RSN_SELECTOR_LEN); 462 return 0; 463 } 464 #endif /* CONFIG_P2P */ 465 466 return 0; 467 } 468 469 470 /** 471 * wpa_supplicant_parse_ies - Parse EAPOL-Key Key Data IEs 472 * @buf: Pointer to the Key Data buffer 473 * @len: Key Data Length 474 * @ie: Pointer to parsed IE data 475 * Returns: 0 on success, -1 on failure 476 */ 477 int wpa_supplicant_parse_ies(const u8 *buf, size_t len, 478 struct wpa_eapol_ie_parse *ie) 479 { 480 const u8 *pos, *end; 481 int ret = 0; 482 483 os_memset(ie, 0, sizeof(*ie)); 484 for (pos = buf, end = pos + len; end - pos > 1; pos += 2 + pos[1]) { 485 if (pos[0] == 0xdd && 486 ((pos == buf + len - 1) || pos[1] == 0)) { 487 /* Ignore padding */ 488 break; 489 } 490 if (2 + pos[1] > end - pos) { 491 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key Key Data " 492 "underflow (ie=%d len=%d pos=%d)", 493 pos[0], pos[1], (int) (pos - buf)); 494 wpa_hexdump_key(MSG_DEBUG, "WPA: Key Data", 495 buf, len); 496 ret = -1; 497 break; 498 } 499 if (*pos == WLAN_EID_RSN) { 500 ie->rsn_ie = pos; 501 ie->rsn_ie_len = pos[1] + 2; 502 wpa_hexdump(MSG_DEBUG, "WPA: RSN IE in EAPOL-Key", 503 ie->rsn_ie, ie->rsn_ie_len); 504 } else if (*pos == WLAN_EID_MOBILITY_DOMAIN && 505 pos[1] >= sizeof(struct rsn_mdie)) { 506 ie->mdie = pos; 507 ie->mdie_len = pos[1] + 2; 508 wpa_hexdump(MSG_DEBUG, "WPA: MDIE in EAPOL-Key", 509 ie->mdie, ie->mdie_len); 510 } else if (*pos == WLAN_EID_FAST_BSS_TRANSITION && 511 pos[1] >= sizeof(struct rsn_ftie)) { 512 ie->ftie = pos; 513 ie->ftie_len = pos[1] + 2; 514 wpa_hexdump(MSG_DEBUG, "WPA: FTIE in EAPOL-Key", 515 ie->ftie, ie->ftie_len); 516 } else if (*pos == WLAN_EID_TIMEOUT_INTERVAL && pos[1] >= 5) { 517 if (pos[2] == WLAN_TIMEOUT_REASSOC_DEADLINE) { 518 ie->reassoc_deadline = pos; 519 wpa_hexdump(MSG_DEBUG, "WPA: Reassoc Deadline " 520 "in EAPOL-Key", 521 ie->reassoc_deadline, pos[1] + 2); 522 } else if (pos[2] == WLAN_TIMEOUT_KEY_LIFETIME) { 523 ie->key_lifetime = pos; 524 wpa_hexdump(MSG_DEBUG, "WPA: KeyLifetime " 525 "in EAPOL-Key", 526 ie->key_lifetime, pos[1] + 2); 527 } else { 528 wpa_hexdump(MSG_DEBUG, "WPA: Unrecognized " 529 "EAPOL-Key Key Data IE", 530 pos, 2 + pos[1]); 531 } 532 } else if (*pos == WLAN_EID_LINK_ID) { 533 if (pos[1] >= 18) { 534 ie->lnkid = pos; 535 ie->lnkid_len = pos[1] + 2; 536 } 537 } else if (*pos == WLAN_EID_EXT_CAPAB) { 538 ie->ext_capab = pos; 539 ie->ext_capab_len = pos[1] + 2; 540 } else if (*pos == WLAN_EID_SUPP_RATES) { 541 ie->supp_rates = pos; 542 ie->supp_rates_len = pos[1] + 2; 543 } else if (*pos == WLAN_EID_EXT_SUPP_RATES) { 544 ie->ext_supp_rates = pos; 545 ie->ext_supp_rates_len = pos[1] + 2; 546 } else if (*pos == WLAN_EID_HT_CAP && 547 pos[1] >= sizeof(struct ieee80211_ht_capabilities)) { 548 ie->ht_capabilities = pos + 2; 549 } else if (*pos == WLAN_EID_VHT_AID) { 550 if (pos[1] >= 2) 551 ie->aid = WPA_GET_LE16(pos + 2) & 0x3fff; 552 } else if (*pos == WLAN_EID_VHT_CAP && 553 pos[1] >= sizeof(struct ieee80211_vht_capabilities)) 554 { 555 ie->vht_capabilities = pos + 2; 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