1 /* 2 * wpa_supplicant - WPA/RSN IE and KDE processing 3 * Copyright (c) 2003-2018, 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 #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 if (sm->ocv) 227 capab |= WPA_CAPABILITY_OCVC; 228 WPA_PUT_LE16(pos, capab); 229 pos += 2; 230 231 if (sm->cur_pmksa) { 232 /* PMKID Count (2 octets, little endian) */ 233 *pos++ = 1; 234 *pos++ = 0; 235 /* PMKID */ 236 os_memcpy(pos, sm->cur_pmksa->pmkid, PMKID_LEN); 237 pos += PMKID_LEN; 238 } 239 240 #ifdef CONFIG_IEEE80211W 241 if (wpa_cipher_valid_mgmt_group(mgmt_group_cipher)) { 242 if (!sm->cur_pmksa) { 243 /* PMKID Count */ 244 WPA_PUT_LE16(pos, 0); 245 pos += 2; 246 } 247 248 /* Management Group Cipher Suite */ 249 RSN_SELECTOR_PUT(pos, wpa_cipher_to_suite(WPA_PROTO_RSN, 250 mgmt_group_cipher)); 251 pos += RSN_SELECTOR_LEN; 252 } 253 #endif /* CONFIG_IEEE80211W */ 254 255 hdr->len = (pos - rsn_ie) - 2; 256 257 WPA_ASSERT((size_t) (pos - rsn_ie) <= rsn_ie_len); 258 259 return pos - rsn_ie; 260 } 261 262 263 #ifdef CONFIG_HS20 264 static int wpa_gen_wpa_ie_osen(u8 *wpa_ie, size_t wpa_ie_len, 265 int pairwise_cipher, int group_cipher, 266 int key_mgmt) 267 { 268 u8 *pos, *len; 269 u32 suite; 270 271 if (wpa_ie_len < 2 + 4 + RSN_SELECTOR_LEN + 272 2 + RSN_SELECTOR_LEN + 2 + RSN_SELECTOR_LEN) 273 return -1; 274 275 pos = wpa_ie; 276 *pos++ = WLAN_EID_VENDOR_SPECIFIC; 277 len = pos++; /* to be filled */ 278 WPA_PUT_BE24(pos, OUI_WFA); 279 pos += 3; 280 *pos++ = HS20_OSEN_OUI_TYPE; 281 282 /* Group Data Cipher Suite */ 283 suite = wpa_cipher_to_suite(WPA_PROTO_RSN, group_cipher); 284 if (suite == 0) { 285 wpa_printf(MSG_WARNING, "Invalid group cipher (%d).", 286 group_cipher); 287 return -1; 288 } 289 RSN_SELECTOR_PUT(pos, suite); 290 pos += RSN_SELECTOR_LEN; 291 292 /* Pairwise Cipher Suite Count and List */ 293 WPA_PUT_LE16(pos, 1); 294 pos += 2; 295 suite = wpa_cipher_to_suite(WPA_PROTO_RSN, pairwise_cipher); 296 if (suite == 0 || 297 (!wpa_cipher_valid_pairwise(pairwise_cipher) && 298 pairwise_cipher != WPA_CIPHER_NONE)) { 299 wpa_printf(MSG_WARNING, "Invalid pairwise cipher (%d).", 300 pairwise_cipher); 301 return -1; 302 } 303 RSN_SELECTOR_PUT(pos, suite); 304 pos += RSN_SELECTOR_LEN; 305 306 /* AKM Suite Count and List */ 307 WPA_PUT_LE16(pos, 1); 308 pos += 2; 309 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_OSEN); 310 pos += RSN_SELECTOR_LEN; 311 312 *len = pos - len - 1; 313 314 WPA_ASSERT((size_t) (pos - wpa_ie) <= wpa_ie_len); 315 316 return pos - wpa_ie; 317 } 318 #endif /* CONFIG_HS20 */ 319 320 321 /** 322 * wpa_gen_wpa_ie - Generate WPA/RSN IE based on current security policy 323 * @sm: Pointer to WPA state machine data from wpa_sm_init() 324 * @wpa_ie: Pointer to memory area for the generated WPA/RSN IE 325 * @wpa_ie_len: Maximum length of the generated WPA/RSN IE 326 * Returns: Length of the generated WPA/RSN IE or -1 on failure 327 */ 328 int wpa_gen_wpa_ie(struct wpa_sm *sm, u8 *wpa_ie, size_t wpa_ie_len) 329 { 330 if (sm->proto == WPA_PROTO_RSN) 331 return wpa_gen_wpa_ie_rsn(wpa_ie, wpa_ie_len, 332 sm->pairwise_cipher, 333 sm->group_cipher, 334 sm->key_mgmt, sm->mgmt_group_cipher, 335 sm); 336 #ifdef CONFIG_HS20 337 else if (sm->proto == WPA_PROTO_OSEN) 338 return wpa_gen_wpa_ie_osen(wpa_ie, wpa_ie_len, 339 sm->pairwise_cipher, 340 sm->group_cipher, 341 sm->key_mgmt); 342 #endif /* CONFIG_HS20 */ 343 else 344 return wpa_gen_wpa_ie_wpa(wpa_ie, wpa_ie_len, 345 sm->pairwise_cipher, 346 sm->group_cipher, 347 sm->key_mgmt); 348 } 349 350 351 /** 352 * wpa_parse_vendor_specific - Parse Vendor Specific IEs 353 * @pos: Pointer to the IE header 354 * @end: Pointer to the end of the Key Data buffer 355 * @ie: Pointer to parsed IE data 356 * Returns: 0 on success, 1 if end mark is found, -1 on failure 357 */ 358 static int wpa_parse_vendor_specific(const u8 *pos, const u8 *end, 359 struct wpa_eapol_ie_parse *ie) 360 { 361 unsigned int oui; 362 363 if (pos[1] < 4) { 364 wpa_printf(MSG_MSGDUMP, "Too short vendor specific IE ignored (len=%u)", 365 pos[1]); 366 return 1; 367 } 368 369 oui = WPA_GET_BE24(&pos[2]); 370 if (oui == OUI_MICROSOFT && pos[5] == WMM_OUI_TYPE && pos[1] > 4) { 371 if (pos[6] == WMM_OUI_SUBTYPE_INFORMATION_ELEMENT) { 372 ie->wmm = &pos[2]; 373 ie->wmm_len = pos[1]; 374 wpa_hexdump(MSG_DEBUG, "WPA: WMM IE", 375 ie->wmm, ie->wmm_len); 376 } else if (pos[6] == WMM_OUI_SUBTYPE_PARAMETER_ELEMENT) { 377 ie->wmm = &pos[2]; 378 ie->wmm_len = pos[1]; 379 wpa_hexdump(MSG_DEBUG, "WPA: WMM Parameter Element", 380 ie->wmm, ie->wmm_len); 381 } 382 } 383 return 0; 384 } 385 386 387 /** 388 * wpa_parse_generic - Parse EAPOL-Key Key Data Generic IEs 389 * @pos: Pointer to the IE header 390 * @end: Pointer to the end of the Key Data buffer 391 * @ie: Pointer to parsed IE data 392 * Returns: 0 on success, 1 if end mark is found, -1 on failure 393 */ 394 static int wpa_parse_generic(const u8 *pos, const u8 *end, 395 struct wpa_eapol_ie_parse *ie) 396 { 397 if (pos[1] == 0) 398 return 1; 399 400 if (pos[1] >= 6 && 401 RSN_SELECTOR_GET(pos + 2) == WPA_OUI_TYPE && 402 pos[2 + WPA_SELECTOR_LEN] == 1 && 403 pos[2 + WPA_SELECTOR_LEN + 1] == 0) { 404 ie->wpa_ie = pos; 405 ie->wpa_ie_len = pos[1] + 2; 406 wpa_hexdump(MSG_DEBUG, "WPA: WPA IE in EAPOL-Key", 407 ie->wpa_ie, ie->wpa_ie_len); 408 return 0; 409 } 410 411 if (1 + RSN_SELECTOR_LEN < end - pos && 412 pos[1] >= RSN_SELECTOR_LEN + PMKID_LEN && 413 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_PMKID) { 414 ie->pmkid = pos + 2 + RSN_SELECTOR_LEN; 415 wpa_hexdump(MSG_DEBUG, "WPA: PMKID 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_GROUPKEY) { 422 ie->gtk = pos + 2 + RSN_SELECTOR_LEN; 423 ie->gtk_len = pos[1] - RSN_SELECTOR_LEN; 424 wpa_hexdump_key(MSG_DEBUG, "WPA: GTK 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_MAC_ADDR) { 431 ie->mac_addr = pos + 2 + RSN_SELECTOR_LEN; 432 ie->mac_addr_len = pos[1] - RSN_SELECTOR_LEN; 433 wpa_hexdump(MSG_DEBUG, "WPA: MAC Address in EAPOL-Key", 434 pos, pos[1] + 2); 435 return 0; 436 } 437 438 #ifdef CONFIG_IEEE80211W 439 if (pos[1] > RSN_SELECTOR_LEN + 2 && 440 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_IGTK) { 441 ie->igtk = pos + 2 + RSN_SELECTOR_LEN; 442 ie->igtk_len = pos[1] - RSN_SELECTOR_LEN; 443 wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK in EAPOL-Key", 444 pos, pos[1] + 2); 445 return 0; 446 } 447 #endif /* CONFIG_IEEE80211W */ 448 449 #ifdef CONFIG_P2P 450 if (pos[1] >= RSN_SELECTOR_LEN + 1 && 451 RSN_SELECTOR_GET(pos + 2) == WFA_KEY_DATA_IP_ADDR_REQ) { 452 ie->ip_addr_req = pos + 2 + RSN_SELECTOR_LEN; 453 wpa_hexdump(MSG_DEBUG, "WPA: IP Address Request in EAPOL-Key", 454 ie->ip_addr_req, pos[1] - RSN_SELECTOR_LEN); 455 return 0; 456 } 457 458 if (pos[1] >= RSN_SELECTOR_LEN + 3 * 4 && 459 RSN_SELECTOR_GET(pos + 2) == WFA_KEY_DATA_IP_ADDR_ALLOC) { 460 ie->ip_addr_alloc = pos + 2 + RSN_SELECTOR_LEN; 461 wpa_hexdump(MSG_DEBUG, 462 "WPA: IP Address Allocation in EAPOL-Key", 463 ie->ip_addr_alloc, pos[1] - RSN_SELECTOR_LEN); 464 return 0; 465 } 466 #endif /* CONFIG_P2P */ 467 468 #ifdef CONFIG_OCV 469 if (pos[1] >= RSN_SELECTOR_LEN + 1 && 470 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_OCI) { 471 ie->oci = pos + 2 + RSN_SELECTOR_LEN; 472 ie->oci_len = pos[1] - RSN_SELECTOR_LEN; 473 wpa_hexdump(MSG_DEBUG, "WPA: OCI KDE in EAPOL-Key", 474 pos, pos[1] + 2); 475 return 0; 476 } 477 #endif /* CONFIG_OCV */ 478 479 return 0; 480 } 481 482 483 /** 484 * wpa_supplicant_parse_ies - Parse EAPOL-Key Key Data IEs 485 * @buf: Pointer to the Key Data buffer 486 * @len: Key Data Length 487 * @ie: Pointer to parsed IE data 488 * Returns: 0 on success, -1 on failure 489 */ 490 int wpa_supplicant_parse_ies(const u8 *buf, size_t len, 491 struct wpa_eapol_ie_parse *ie) 492 { 493 const u8 *pos, *end; 494 int ret = 0; 495 496 os_memset(ie, 0, sizeof(*ie)); 497 for (pos = buf, end = pos + len; end - pos > 1; pos += 2 + pos[1]) { 498 if (pos[0] == 0xdd && 499 ((pos == buf + len - 1) || pos[1] == 0)) { 500 /* Ignore padding */ 501 break; 502 } 503 if (2 + pos[1] > end - pos) { 504 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key Key Data " 505 "underflow (ie=%d len=%d pos=%d)", 506 pos[0], pos[1], (int) (pos - buf)); 507 wpa_hexdump_key(MSG_DEBUG, "WPA: Key Data", 508 buf, len); 509 ret = -1; 510 break; 511 } 512 if (*pos == WLAN_EID_RSN) { 513 ie->rsn_ie = pos; 514 ie->rsn_ie_len = pos[1] + 2; 515 wpa_hexdump(MSG_DEBUG, "WPA: RSN IE in EAPOL-Key", 516 ie->rsn_ie, ie->rsn_ie_len); 517 } else if (*pos == WLAN_EID_MOBILITY_DOMAIN && 518 pos[1] >= sizeof(struct rsn_mdie)) { 519 ie->mdie = pos; 520 ie->mdie_len = pos[1] + 2; 521 wpa_hexdump(MSG_DEBUG, "WPA: MDIE in EAPOL-Key", 522 ie->mdie, ie->mdie_len); 523 } else if (*pos == WLAN_EID_FAST_BSS_TRANSITION && 524 pos[1] >= sizeof(struct rsn_ftie)) { 525 ie->ftie = pos; 526 ie->ftie_len = pos[1] + 2; 527 wpa_hexdump(MSG_DEBUG, "WPA: FTIE in EAPOL-Key", 528 ie->ftie, ie->ftie_len); 529 } else if (*pos == WLAN_EID_TIMEOUT_INTERVAL && pos[1] >= 5) { 530 if (pos[2] == WLAN_TIMEOUT_REASSOC_DEADLINE) { 531 ie->reassoc_deadline = pos; 532 wpa_hexdump(MSG_DEBUG, "WPA: Reassoc Deadline " 533 "in EAPOL-Key", 534 ie->reassoc_deadline, pos[1] + 2); 535 } else if (pos[2] == WLAN_TIMEOUT_KEY_LIFETIME) { 536 ie->key_lifetime = pos; 537 wpa_hexdump(MSG_DEBUG, "WPA: KeyLifetime " 538 "in EAPOL-Key", 539 ie->key_lifetime, pos[1] + 2); 540 } else { 541 wpa_hexdump(MSG_DEBUG, "WPA: Unrecognized " 542 "EAPOL-Key Key Data IE", 543 pos, 2 + pos[1]); 544 } 545 } else if (*pos == WLAN_EID_LINK_ID) { 546 if (pos[1] >= 18) { 547 ie->lnkid = pos; 548 ie->lnkid_len = pos[1] + 2; 549 } 550 } else if (*pos == WLAN_EID_EXT_CAPAB) { 551 ie->ext_capab = pos; 552 ie->ext_capab_len = pos[1] + 2; 553 } else if (*pos == WLAN_EID_SUPP_RATES) { 554 ie->supp_rates = pos; 555 ie->supp_rates_len = pos[1] + 2; 556 } else if (*pos == WLAN_EID_EXT_SUPP_RATES) { 557 ie->ext_supp_rates = pos; 558 ie->ext_supp_rates_len = pos[1] + 2; 559 } else if (*pos == WLAN_EID_HT_CAP && 560 pos[1] >= sizeof(struct ieee80211_ht_capabilities)) { 561 ie->ht_capabilities = pos + 2; 562 } else if (*pos == WLAN_EID_VHT_AID) { 563 if (pos[1] >= 2) 564 ie->aid = WPA_GET_LE16(pos + 2) & 0x3fff; 565 } else if (*pos == WLAN_EID_VHT_CAP && 566 pos[1] >= sizeof(struct ieee80211_vht_capabilities)) 567 { 568 ie->vht_capabilities = pos + 2; 569 } else if (*pos == WLAN_EID_QOS && pos[1] >= 1) { 570 ie->qosinfo = pos[2]; 571 } else if (*pos == WLAN_EID_SUPPORTED_CHANNELS) { 572 ie->supp_channels = pos + 2; 573 ie->supp_channels_len = pos[1]; 574 } else if (*pos == WLAN_EID_SUPPORTED_OPERATING_CLASSES) { 575 /* 576 * The value of the Length field of the Supported 577 * Operating Classes element is between 2 and 253. 578 * Silently skip invalid elements to avoid interop 579 * issues when trying to use the value. 580 */ 581 if (pos[1] >= 2 && pos[1] <= 253) { 582 ie->supp_oper_classes = pos + 2; 583 ie->supp_oper_classes_len = pos[1]; 584 } 585 } else if (*pos == WLAN_EID_VENDOR_SPECIFIC) { 586 ret = wpa_parse_generic(pos, end, ie); 587 if (ret < 0) 588 break; 589 if (ret > 0) { 590 ret = 0; 591 break; 592 } 593 594 ret = wpa_parse_vendor_specific(pos, end, ie); 595 if (ret < 0) 596 break; 597 if (ret > 0) { 598 ret = 0; 599 break; 600 } 601 } else { 602 wpa_hexdump(MSG_DEBUG, "WPA: Unrecognized EAPOL-Key " 603 "Key Data IE", pos, 2 + pos[1]); 604 } 605 } 606 607 return ret; 608 } 609
