1 /* 2 * hostapd - WPA/RSN IE and KDE definitions 3 * Copyright (c) 2004-2008, 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 "utils/includes.h" 10 11 #include "utils/common.h" 12 #include "common/ieee802_11_defs.h" 13 #include "eapol_auth/eapol_auth_sm.h" 14 #include "ap_config.h" 15 #include "ieee802_11.h" 16 #include "wpa_auth.h" 17 #include "pmksa_cache_auth.h" 18 #include "wpa_auth_ie.h" 19 #include "wpa_auth_i.h" 20 21 22 #ifdef CONFIG_RSN_TESTING 23 int rsn_testing = 0; 24 #endif /* CONFIG_RSN_TESTING */ 25 26 27 static int wpa_write_wpa_ie(struct wpa_auth_config *conf, u8 *buf, size_t len) 28 { 29 struct wpa_ie_hdr *hdr; 30 int num_suites; 31 u8 *pos, *count; 32 u32 suite; 33 34 hdr = (struct wpa_ie_hdr *) buf; 35 hdr->elem_id = WLAN_EID_VENDOR_SPECIFIC; 36 RSN_SELECTOR_PUT(hdr->oui, WPA_OUI_TYPE); 37 WPA_PUT_LE16(hdr->version, WPA_VERSION); 38 pos = (u8 *) (hdr + 1); 39 40 suite = wpa_cipher_to_suite(WPA_PROTO_WPA, conf->wpa_group); 41 if (suite == 0) { 42 wpa_printf(MSG_DEBUG, "Invalid group cipher (%d).", 43 conf->wpa_group); 44 return -1; 45 } 46 RSN_SELECTOR_PUT(pos, suite); 47 pos += WPA_SELECTOR_LEN; 48 49 count = pos; 50 pos += 2; 51 52 num_suites = wpa_cipher_put_suites(pos, conf->wpa_pairwise); 53 if (num_suites == 0) { 54 wpa_printf(MSG_DEBUG, "Invalid pairwise cipher (%d).", 55 conf->wpa_pairwise); 56 return -1; 57 } 58 pos += num_suites * WPA_SELECTOR_LEN; 59 WPA_PUT_LE16(count, num_suites); 60 61 num_suites = 0; 62 count = pos; 63 pos += 2; 64 65 if (conf->wpa_key_mgmt & WPA_KEY_MGMT_IEEE8021X) { 66 RSN_SELECTOR_PUT(pos, WPA_AUTH_KEY_MGMT_UNSPEC_802_1X); 67 pos += WPA_SELECTOR_LEN; 68 num_suites++; 69 } 70 if (conf->wpa_key_mgmt & WPA_KEY_MGMT_PSK) { 71 RSN_SELECTOR_PUT(pos, WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X); 72 pos += WPA_SELECTOR_LEN; 73 num_suites++; 74 } 75 76 if (num_suites == 0) { 77 wpa_printf(MSG_DEBUG, "Invalid key management type (%d).", 78 conf->wpa_key_mgmt); 79 return -1; 80 } 81 WPA_PUT_LE16(count, num_suites); 82 83 /* WPA Capabilities; use defaults, so no need to include it */ 84 85 hdr->len = (pos - buf) - 2; 86 87 return pos - buf; 88 } 89 90 91 int wpa_write_rsn_ie(struct wpa_auth_config *conf, u8 *buf, size_t len, 92 const u8 *pmkid) 93 { 94 struct rsn_ie_hdr *hdr; 95 int num_suites, res; 96 u8 *pos, *count; 97 u16 capab; 98 u32 suite; 99 100 hdr = (struct rsn_ie_hdr *) buf; 101 hdr->elem_id = WLAN_EID_RSN; 102 WPA_PUT_LE16(hdr->version, RSN_VERSION); 103 pos = (u8 *) (hdr + 1); 104 105 suite = wpa_cipher_to_suite(WPA_PROTO_RSN, conf->wpa_group); 106 if (suite == 0) { 107 wpa_printf(MSG_DEBUG, "Invalid group cipher (%d).", 108 conf->wpa_group); 109 return -1; 110 } 111 RSN_SELECTOR_PUT(pos, suite); 112 pos += RSN_SELECTOR_LEN; 113 114 num_suites = 0; 115 count = pos; 116 pos += 2; 117 118 #ifdef CONFIG_RSN_TESTING 119 if (rsn_testing) { 120 RSN_SELECTOR_PUT(pos, RSN_SELECTOR(0x12, 0x34, 0x56, 1)); 121 pos += RSN_SELECTOR_LEN; 122 num_suites++; 123 } 124 #endif /* CONFIG_RSN_TESTING */ 125 126 res = rsn_cipher_put_suites(pos, conf->rsn_pairwise); 127 num_suites += res; 128 pos += res * RSN_SELECTOR_LEN; 129 130 #ifdef CONFIG_RSN_TESTING 131 if (rsn_testing) { 132 RSN_SELECTOR_PUT(pos, RSN_SELECTOR(0x12, 0x34, 0x56, 2)); 133 pos += RSN_SELECTOR_LEN; 134 num_suites++; 135 } 136 #endif /* CONFIG_RSN_TESTING */ 137 138 if (num_suites == 0) { 139 wpa_printf(MSG_DEBUG, "Invalid pairwise cipher (%d).", 140 conf->rsn_pairwise); 141 return -1; 142 } 143 WPA_PUT_LE16(count, num_suites); 144 145 num_suites = 0; 146 count = pos; 147 pos += 2; 148 149 #ifdef CONFIG_RSN_TESTING 150 if (rsn_testing) { 151 RSN_SELECTOR_PUT(pos, RSN_SELECTOR(0x12, 0x34, 0x56, 1)); 152 pos += RSN_SELECTOR_LEN; 153 num_suites++; 154 } 155 #endif /* CONFIG_RSN_TESTING */ 156 157 if (conf->wpa_key_mgmt & WPA_KEY_MGMT_IEEE8021X) { 158 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_UNSPEC_802_1X); 159 pos += RSN_SELECTOR_LEN; 160 num_suites++; 161 } 162 if (conf->wpa_key_mgmt & WPA_KEY_MGMT_PSK) { 163 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X); 164 pos += RSN_SELECTOR_LEN; 165 num_suites++; 166 } 167 #ifdef CONFIG_IEEE80211R 168 if (conf->wpa_key_mgmt & WPA_KEY_MGMT_FT_IEEE8021X) { 169 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_802_1X); 170 pos += RSN_SELECTOR_LEN; 171 num_suites++; 172 } 173 if (conf->wpa_key_mgmt & WPA_KEY_MGMT_FT_PSK) { 174 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_PSK); 175 pos += RSN_SELECTOR_LEN; 176 num_suites++; 177 } 178 #endif /* CONFIG_IEEE80211R */ 179 #ifdef CONFIG_IEEE80211W 180 if (conf->wpa_key_mgmt & WPA_KEY_MGMT_IEEE8021X_SHA256) { 181 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_802_1X_SHA256); 182 pos += RSN_SELECTOR_LEN; 183 num_suites++; 184 } 185 if (conf->wpa_key_mgmt & WPA_KEY_MGMT_PSK_SHA256) { 186 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_PSK_SHA256); 187 pos += RSN_SELECTOR_LEN; 188 num_suites++; 189 } 190 #endif /* CONFIG_IEEE80211W */ 191 #ifdef CONFIG_SAE 192 if (conf->wpa_key_mgmt & WPA_KEY_MGMT_SAE) { 193 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_SAE); 194 pos += RSN_SELECTOR_LEN; 195 num_suites++; 196 } 197 if (conf->wpa_key_mgmt & WPA_KEY_MGMT_FT_SAE) { 198 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_SAE); 199 pos += RSN_SELECTOR_LEN; 200 num_suites++; 201 } 202 #endif /* CONFIG_SAE */ 203 204 #ifdef CONFIG_RSN_TESTING 205 if (rsn_testing) { 206 RSN_SELECTOR_PUT(pos, RSN_SELECTOR(0x12, 0x34, 0x56, 2)); 207 pos += RSN_SELECTOR_LEN; 208 num_suites++; 209 } 210 #endif /* CONFIG_RSN_TESTING */ 211 212 if (num_suites == 0) { 213 wpa_printf(MSG_DEBUG, "Invalid key management type (%d).", 214 conf->wpa_key_mgmt); 215 return -1; 216 } 217 WPA_PUT_LE16(count, num_suites); 218 219 /* RSN Capabilities */ 220 capab = 0; 221 if (conf->rsn_preauth) 222 capab |= WPA_CAPABILITY_PREAUTH; 223 if (conf->peerkey) 224 capab |= WPA_CAPABILITY_PEERKEY_ENABLED; 225 if (conf->wmm_enabled) { 226 /* 4 PTKSA replay counters when using WMM */ 227 capab |= (RSN_NUM_REPLAY_COUNTERS_16 << 2); 228 } 229 #ifdef CONFIG_IEEE80211W 230 if (conf->ieee80211w != NO_MGMT_FRAME_PROTECTION) { 231 capab |= WPA_CAPABILITY_MFPC; 232 if (conf->ieee80211w == MGMT_FRAME_PROTECTION_REQUIRED) 233 capab |= WPA_CAPABILITY_MFPR; 234 } 235 #endif /* CONFIG_IEEE80211W */ 236 #ifdef CONFIG_RSN_TESTING 237 if (rsn_testing) 238 capab |= BIT(8) | BIT(14) | BIT(15); 239 #endif /* CONFIG_RSN_TESTING */ 240 WPA_PUT_LE16(pos, capab); 241 pos += 2; 242 243 if (pmkid) { 244 if (pos + 2 + PMKID_LEN > buf + len) 245 return -1; 246 /* PMKID Count */ 247 WPA_PUT_LE16(pos, 1); 248 pos += 2; 249 os_memcpy(pos, pmkid, PMKID_LEN); 250 pos += PMKID_LEN; 251 } 252 253 #ifdef CONFIG_IEEE80211W 254 if (conf->ieee80211w != NO_MGMT_FRAME_PROTECTION) { 255 if (pos + 2 + 4 > buf + len) 256 return -1; 257 if (pmkid == NULL) { 258 /* PMKID Count */ 259 WPA_PUT_LE16(pos, 0); 260 pos += 2; 261 } 262 263 /* Management Group Cipher Suite */ 264 switch (conf->group_mgmt_cipher) { 265 case WPA_CIPHER_AES_128_CMAC: 266 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_AES_128_CMAC); 267 break; 268 case WPA_CIPHER_BIP_GMAC_128: 269 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_BIP_GMAC_128); 270 break; 271 case WPA_CIPHER_BIP_GMAC_256: 272 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_BIP_GMAC_256); 273 break; 274 case WPA_CIPHER_BIP_CMAC_256: 275 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_BIP_CMAC_256); 276 break; 277 default: 278 wpa_printf(MSG_DEBUG, 279 "Invalid group management cipher (0x%x)", 280 conf->group_mgmt_cipher); 281 return -1; 282 } 283 pos += RSN_SELECTOR_LEN; 284 } 285 #endif /* CONFIG_IEEE80211W */ 286 287 #ifdef CONFIG_RSN_TESTING 288 if (rsn_testing) { 289 /* 290 * Fill in any defined fields and add extra data to the end of 291 * the element. 292 */ 293 int pmkid_count_set = pmkid != NULL; 294 if (conf->ieee80211w != NO_MGMT_FRAME_PROTECTION) 295 pmkid_count_set = 1; 296 /* PMKID Count */ 297 WPA_PUT_LE16(pos, 0); 298 pos += 2; 299 if (conf->ieee80211w == NO_MGMT_FRAME_PROTECTION) { 300 /* Management Group Cipher Suite */ 301 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_AES_128_CMAC); 302 pos += RSN_SELECTOR_LEN; 303 } 304 305 os_memset(pos, 0x12, 17); 306 pos += 17; 307 } 308 #endif /* CONFIG_RSN_TESTING */ 309 310 hdr->len = (pos - buf) - 2; 311 312 return pos - buf; 313 } 314 315 316 static u8 * wpa_write_osen(struct wpa_auth_config *conf, u8 *eid) 317 { 318 u8 *len; 319 u16 capab; 320 321 *eid++ = WLAN_EID_VENDOR_SPECIFIC; 322 len = eid++; /* to be filled */ 323 WPA_PUT_BE24(eid, OUI_WFA); 324 eid += 3; 325 *eid++ = HS20_OSEN_OUI_TYPE; 326 327 /* Group Data Cipher Suite */ 328 RSN_SELECTOR_PUT(eid, RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED); 329 eid += RSN_SELECTOR_LEN; 330 331 /* Pairwise Cipher Suite Count and List */ 332 WPA_PUT_LE16(eid, 1); 333 eid += 2; 334 RSN_SELECTOR_PUT(eid, RSN_CIPHER_SUITE_CCMP); 335 eid += RSN_SELECTOR_LEN; 336 337 /* AKM Suite Count and List */ 338 WPA_PUT_LE16(eid, 1); 339 eid += 2; 340 RSN_SELECTOR_PUT(eid, RSN_AUTH_KEY_MGMT_OSEN); 341 eid += RSN_SELECTOR_LEN; 342 343 /* RSN Capabilities */ 344 capab = 0; 345 if (conf->wmm_enabled) { 346 /* 4 PTKSA replay counters when using WMM */ 347 capab |= (RSN_NUM_REPLAY_COUNTERS_16 << 2); 348 } 349 #ifdef CONFIG_IEEE80211W 350 if (conf->ieee80211w != NO_MGMT_FRAME_PROTECTION) { 351 capab |= WPA_CAPABILITY_MFPC; 352 if (conf->ieee80211w == MGMT_FRAME_PROTECTION_REQUIRED) 353 capab |= WPA_CAPABILITY_MFPR; 354 } 355 #endif /* CONFIG_IEEE80211W */ 356 WPA_PUT_LE16(eid, capab); 357 eid += 2; 358 359 *len = eid - len - 1; 360 361 return eid; 362 } 363 364 365 int wpa_auth_gen_wpa_ie(struct wpa_authenticator *wpa_auth) 366 { 367 u8 *pos, buf[128]; 368 int res; 369 370 pos = buf; 371 372 if (wpa_auth->conf.wpa == WPA_PROTO_OSEN) { 373 pos = wpa_write_osen(&wpa_auth->conf, pos); 374 } 375 if (wpa_auth->conf.wpa & WPA_PROTO_RSN) { 376 res = wpa_write_rsn_ie(&wpa_auth->conf, 377 pos, buf + sizeof(buf) - pos, NULL); 378 if (res < 0) 379 return res; 380 pos += res; 381 } 382 #ifdef CONFIG_IEEE80211R 383 if (wpa_key_mgmt_ft(wpa_auth->conf.wpa_key_mgmt)) { 384 res = wpa_write_mdie(&wpa_auth->conf, pos, 385 buf + sizeof(buf) - pos); 386 if (res < 0) 387 return res; 388 pos += res; 389 } 390 #endif /* CONFIG_IEEE80211R */ 391 if (wpa_auth->conf.wpa & WPA_PROTO_WPA) { 392 res = wpa_write_wpa_ie(&wpa_auth->conf, 393 pos, buf + sizeof(buf) - pos); 394 if (res < 0) 395 return res; 396 pos += res; 397 } 398 399 os_free(wpa_auth->wpa_ie); 400 wpa_auth->wpa_ie = os_malloc(pos - buf); 401 if (wpa_auth->wpa_ie == NULL) 402 return -1; 403 os_memcpy(wpa_auth->wpa_ie, buf, pos - buf); 404 wpa_auth->wpa_ie_len = pos - buf; 405 406 return 0; 407 } 408 409 410 u8 * wpa_add_kde(u8 *pos, u32 kde, const u8 *data, size_t data_len, 411 const u8 *data2, size_t data2_len) 412 { 413 *pos++ = WLAN_EID_VENDOR_SPECIFIC; 414 *pos++ = RSN_SELECTOR_LEN + data_len + data2_len; 415 RSN_SELECTOR_PUT(pos, kde); 416 pos += RSN_SELECTOR_LEN; 417 os_memcpy(pos, data, data_len); 418 pos += data_len; 419 if (data2) { 420 os_memcpy(pos, data2, data2_len); 421 pos += data2_len; 422 } 423 return pos; 424 } 425 426 427 struct wpa_auth_okc_iter_data { 428 struct rsn_pmksa_cache_entry *pmksa; 429 const u8 *aa; 430 const u8 *spa; 431 const u8 *pmkid; 432 }; 433 434 435 static int wpa_auth_okc_iter(struct wpa_authenticator *a, void *ctx) 436 { 437 struct wpa_auth_okc_iter_data *data = ctx; 438 data->pmksa = pmksa_cache_get_okc(a->pmksa, data->aa, data->spa, 439 data->pmkid); 440 if (data->pmksa) 441 return 1; 442 return 0; 443 } 444 445 446 int wpa_validate_wpa_ie(struct wpa_authenticator *wpa_auth, 447 struct wpa_state_machine *sm, 448 const u8 *wpa_ie, size_t wpa_ie_len, 449 const u8 *mdie, size_t mdie_len) 450 { 451 struct wpa_ie_data data; 452 int ciphers, key_mgmt, res, version; 453 u32 selector; 454 size_t i; 455 const u8 *pmkid = NULL; 456 457 if (wpa_auth == NULL || sm == NULL) 458 return WPA_NOT_ENABLED; 459 460 if (wpa_ie == NULL || wpa_ie_len < 1) 461 return WPA_INVALID_IE; 462 463 if (wpa_ie[0] == WLAN_EID_RSN) 464 version = WPA_PROTO_RSN; 465 else 466 version = WPA_PROTO_WPA; 467 468 if (!(wpa_auth->conf.wpa & version)) { 469 wpa_printf(MSG_DEBUG, "Invalid WPA proto (%d) from " MACSTR, 470 version, MAC2STR(sm->addr)); 471 return WPA_INVALID_PROTO; 472 } 473 474 if (version == WPA_PROTO_RSN) { 475 res = wpa_parse_wpa_ie_rsn(wpa_ie, wpa_ie_len, &data); 476 477 selector = RSN_AUTH_KEY_MGMT_UNSPEC_802_1X; 478 if (0) { 479 } 480 #ifdef CONFIG_IEEE80211R 481 else if (data.key_mgmt & WPA_KEY_MGMT_FT_IEEE8021X) 482 selector = RSN_AUTH_KEY_MGMT_FT_802_1X; 483 else if (data.key_mgmt & WPA_KEY_MGMT_FT_PSK) 484 selector = RSN_AUTH_KEY_MGMT_FT_PSK; 485 #endif /* CONFIG_IEEE80211R */ 486 #ifdef CONFIG_IEEE80211W 487 else if (data.key_mgmt & WPA_KEY_MGMT_IEEE8021X_SHA256) 488 selector = RSN_AUTH_KEY_MGMT_802_1X_SHA256; 489 else if (data.key_mgmt & WPA_KEY_MGMT_PSK_SHA256) 490 selector = RSN_AUTH_KEY_MGMT_PSK_SHA256; 491 #endif /* CONFIG_IEEE80211W */ 492 #ifdef CONFIG_SAE 493 else if (data.key_mgmt & WPA_KEY_MGMT_SAE) 494 selector = RSN_AUTH_KEY_MGMT_SAE; 495 else if (data.key_mgmt & WPA_KEY_MGMT_FT_SAE) 496 selector = RSN_AUTH_KEY_MGMT_FT_SAE; 497 #endif /* CONFIG_SAE */ 498 else if (data.key_mgmt & WPA_KEY_MGMT_IEEE8021X) 499 selector = RSN_AUTH_KEY_MGMT_UNSPEC_802_1X; 500 else if (data.key_mgmt & WPA_KEY_MGMT_PSK) 501 selector = RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X; 502 wpa_auth->dot11RSNAAuthenticationSuiteSelected = selector; 503 504 selector = wpa_cipher_to_suite(WPA_PROTO_RSN, 505 data.pairwise_cipher); 506 if (!selector) 507 selector = RSN_CIPHER_SUITE_CCMP; 508 wpa_auth->dot11RSNAPairwiseCipherSelected = selector; 509 510 selector = wpa_cipher_to_suite(WPA_PROTO_RSN, 511 data.group_cipher); 512 if (!selector) 513 selector = RSN_CIPHER_SUITE_CCMP; 514 wpa_auth->dot11RSNAGroupCipherSelected = selector; 515 } else { 516 res = wpa_parse_wpa_ie_wpa(wpa_ie, wpa_ie_len, &data); 517 518 selector = WPA_AUTH_KEY_MGMT_UNSPEC_802_1X; 519 if (data.key_mgmt & WPA_KEY_MGMT_IEEE8021X) 520 selector = WPA_AUTH_KEY_MGMT_UNSPEC_802_1X; 521 else if (data.key_mgmt & WPA_KEY_MGMT_PSK) 522 selector = WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X; 523 wpa_auth->dot11RSNAAuthenticationSuiteSelected = selector; 524 525 selector = wpa_cipher_to_suite(WPA_PROTO_WPA, 526 data.pairwise_cipher); 527 if (!selector) 528 selector = RSN_CIPHER_SUITE_TKIP; 529 wpa_auth->dot11RSNAPairwiseCipherSelected = selector; 530 531 selector = wpa_cipher_to_suite(WPA_PROTO_WPA, 532 data.group_cipher); 533 if (!selector) 534 selector = WPA_CIPHER_SUITE_TKIP; 535 wpa_auth->dot11RSNAGroupCipherSelected = selector; 536 } 537 if (res) { 538 wpa_printf(MSG_DEBUG, "Failed to parse WPA/RSN IE from " 539 MACSTR " (res=%d)", MAC2STR(sm->addr), res); 540 wpa_hexdump(MSG_DEBUG, "WPA/RSN IE", wpa_ie, wpa_ie_len); 541 return WPA_INVALID_IE; 542 } 543 544 if (data.group_cipher != wpa_auth->conf.wpa_group) { 545 wpa_printf(MSG_DEBUG, "Invalid WPA group cipher (0x%x) from " 546 MACSTR, data.group_cipher, MAC2STR(sm->addr)); 547 return WPA_INVALID_GROUP; 548 } 549 550 key_mgmt = data.key_mgmt & wpa_auth->conf.wpa_key_mgmt; 551 if (!key_mgmt) { 552 wpa_printf(MSG_DEBUG, "Invalid WPA key mgmt (0x%x) from " 553 MACSTR, data.key_mgmt, MAC2STR(sm->addr)); 554 return WPA_INVALID_AKMP; 555 } 556 if (0) { 557 } 558 #ifdef CONFIG_IEEE80211R 559 else if (key_mgmt & WPA_KEY_MGMT_FT_IEEE8021X) 560 sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_IEEE8021X; 561 else if (key_mgmt & WPA_KEY_MGMT_FT_PSK) 562 sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_PSK; 563 #endif /* CONFIG_IEEE80211R */ 564 #ifdef CONFIG_IEEE80211W 565 else if (key_mgmt & WPA_KEY_MGMT_IEEE8021X_SHA256) 566 sm->wpa_key_mgmt = WPA_KEY_MGMT_IEEE8021X_SHA256; 567 else if (key_mgmt & WPA_KEY_MGMT_PSK_SHA256) 568 sm->wpa_key_mgmt = WPA_KEY_MGMT_PSK_SHA256; 569 #endif /* CONFIG_IEEE80211W */ 570 #ifdef CONFIG_SAE 571 else if (key_mgmt & WPA_KEY_MGMT_SAE) 572 sm->wpa_key_mgmt = WPA_KEY_MGMT_SAE; 573 else if (key_mgmt & WPA_KEY_MGMT_FT_SAE) 574 sm->wpa_key_mgmt = WPA_KEY_MGMT_FT_SAE; 575 #endif /* CONFIG_SAE */ 576 else if (key_mgmt & WPA_KEY_MGMT_IEEE8021X) 577 sm->wpa_key_mgmt = WPA_KEY_MGMT_IEEE8021X; 578 else 579 sm->wpa_key_mgmt = WPA_KEY_MGMT_PSK; 580 581 if (version == WPA_PROTO_RSN) 582 ciphers = data.pairwise_cipher & wpa_auth->conf.rsn_pairwise; 583 else 584 ciphers = data.pairwise_cipher & wpa_auth->conf.wpa_pairwise; 585 if (!ciphers) { 586 wpa_printf(MSG_DEBUG, "Invalid %s pairwise cipher (0x%x) " 587 "from " MACSTR, 588 version == WPA_PROTO_RSN ? "RSN" : "WPA", 589 data.pairwise_cipher, MAC2STR(sm->addr)); 590 return WPA_INVALID_PAIRWISE; 591 } 592 593 #ifdef CONFIG_IEEE80211W 594 if (wpa_auth->conf.ieee80211w == MGMT_FRAME_PROTECTION_REQUIRED) { 595 if (!(data.capabilities & WPA_CAPABILITY_MFPC)) { 596 wpa_printf(MSG_DEBUG, "Management frame protection " 597 "required, but client did not enable it"); 598 return WPA_MGMT_FRAME_PROTECTION_VIOLATION; 599 } 600 601 if (ciphers & WPA_CIPHER_TKIP) { 602 wpa_printf(MSG_DEBUG, "Management frame protection " 603 "cannot use TKIP"); 604 return WPA_MGMT_FRAME_PROTECTION_VIOLATION; 605 } 606 607 if (data.mgmt_group_cipher != wpa_auth->conf.group_mgmt_cipher) 608 { 609 wpa_printf(MSG_DEBUG, "Unsupported management group " 610 "cipher %d", data.mgmt_group_cipher); 611 return WPA_INVALID_MGMT_GROUP_CIPHER; 612 } 613 } 614 615 if (wpa_auth->conf.ieee80211w == NO_MGMT_FRAME_PROTECTION || 616 !(data.capabilities & WPA_CAPABILITY_MFPC)) 617 sm->mgmt_frame_prot = 0; 618 else 619 sm->mgmt_frame_prot = 1; 620 #endif /* CONFIG_IEEE80211W */ 621 622 #ifdef CONFIG_IEEE80211R 623 if (wpa_key_mgmt_ft(sm->wpa_key_mgmt)) { 624 if (mdie == NULL || mdie_len < MOBILITY_DOMAIN_ID_LEN + 1) { 625 wpa_printf(MSG_DEBUG, "RSN: Trying to use FT, but " 626 "MDIE not included"); 627 return WPA_INVALID_MDIE; 628 } 629 if (os_memcmp(mdie, wpa_auth->conf.mobility_domain, 630 MOBILITY_DOMAIN_ID_LEN) != 0) { 631 wpa_hexdump(MSG_DEBUG, "RSN: Attempted to use unknown " 632 "MDIE", mdie, MOBILITY_DOMAIN_ID_LEN); 633 return WPA_INVALID_MDIE; 634 } 635 } 636 #endif /* CONFIG_IEEE80211R */ 637 638 sm->pairwise = wpa_pick_pairwise_cipher(ciphers, 0); 639 if (sm->pairwise < 0) 640 return WPA_INVALID_PAIRWISE; 641 642 /* TODO: clear WPA/WPA2 state if STA changes from one to another */ 643 if (wpa_ie[0] == WLAN_EID_RSN) 644 sm->wpa = WPA_VERSION_WPA2; 645 else 646 sm->wpa = WPA_VERSION_WPA; 647 648 sm->pmksa = NULL; 649 for (i = 0; i < data.num_pmkid; i++) { 650 wpa_hexdump(MSG_DEBUG, "RSN IE: STA PMKID", 651 &data.pmkid[i * PMKID_LEN], PMKID_LEN); 652 sm->pmksa = pmksa_cache_auth_get(wpa_auth->pmksa, sm->addr, 653 &data.pmkid[i * PMKID_LEN]); 654 if (sm->pmksa) { 655 pmkid = sm->pmksa->pmkid; 656 break; 657 } 658 } 659 for (i = 0; sm->pmksa == NULL && wpa_auth->conf.okc && 660 i < data.num_pmkid; i++) { 661 struct wpa_auth_okc_iter_data idata; 662 idata.pmksa = NULL; 663 idata.aa = wpa_auth->addr; 664 idata.spa = sm->addr; 665 idata.pmkid = &data.pmkid[i * PMKID_LEN]; 666 wpa_auth_for_each_auth(wpa_auth, wpa_auth_okc_iter, &idata); 667 if (idata.pmksa) { 668 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG, 669 "OKC match for PMKID"); 670 sm->pmksa = pmksa_cache_add_okc(wpa_auth->pmksa, 671 idata.pmksa, 672 wpa_auth->addr, 673 idata.pmkid); 674 pmkid = idata.pmkid; 675 break; 676 } 677 } 678 if (sm->pmksa && pmkid) { 679 wpa_auth_vlogger(wpa_auth, sm->addr, LOGGER_DEBUG, 680 "PMKID found from PMKSA cache " 681 "eap_type=%d vlan_id=%d", 682 sm->pmksa->eap_type_authsrv, 683 sm->pmksa->vlan_id); 684 os_memcpy(wpa_auth->dot11RSNAPMKIDUsed, pmkid, PMKID_LEN); 685 } 686 687 if (sm->wpa_ie == NULL || sm->wpa_ie_len < wpa_ie_len) { 688 os_free(sm->wpa_ie); 689 sm->wpa_ie = os_malloc(wpa_ie_len); 690 if (sm->wpa_ie == NULL) 691 return WPA_ALLOC_FAIL; 692 } 693 os_memcpy(sm->wpa_ie, wpa_ie, wpa_ie_len); 694 sm->wpa_ie_len = wpa_ie_len; 695 696 return WPA_IE_OK; 697 } 698 699 700 #ifdef CONFIG_HS20 701 int wpa_validate_osen(struct wpa_authenticator *wpa_auth, 702 struct wpa_state_machine *sm, 703 const u8 *osen_ie, size_t osen_ie_len) 704 { 705 if (wpa_auth == NULL || sm == NULL) 706 return -1; 707 708 /* TODO: parse OSEN element */ 709 sm->wpa_key_mgmt = WPA_KEY_MGMT_OSEN; 710 sm->mgmt_frame_prot = 1; 711 sm->pairwise = WPA_CIPHER_CCMP; 712 sm->wpa = WPA_VERSION_WPA2; 713 714 if (sm->wpa_ie == NULL || sm->wpa_ie_len < osen_ie_len) { 715 os_free(sm->wpa_ie); 716 sm->wpa_ie = os_malloc(osen_ie_len); 717 if (sm->wpa_ie == NULL) 718 return -1; 719 } 720 721 os_memcpy(sm->wpa_ie, osen_ie, osen_ie_len); 722 sm->wpa_ie_len = osen_ie_len; 723 724 return 0; 725 } 726 727 #endif /* CONFIG_HS20 */ 728 729 730 /** 731 * wpa_parse_generic - Parse EAPOL-Key Key Data Generic IEs 732 * @pos: Pointer to the IE header 733 * @end: Pointer to the end of the Key Data buffer 734 * @ie: Pointer to parsed IE data 735 * Returns: 0 on success, 1 if end mark is found, -1 on failure 736 */ 737 static int wpa_parse_generic(const u8 *pos, const u8 *end, 738 struct wpa_eapol_ie_parse *ie) 739 { 740 if (pos[1] == 0) 741 return 1; 742 743 if (pos[1] >= 6 && 744 RSN_SELECTOR_GET(pos + 2) == WPA_OUI_TYPE && 745 pos[2 + WPA_SELECTOR_LEN] == 1 && 746 pos[2 + WPA_SELECTOR_LEN + 1] == 0) { 747 ie->wpa_ie = pos; 748 ie->wpa_ie_len = pos[1] + 2; 749 return 0; 750 } 751 752 if (pos[1] >= 4 && WPA_GET_BE32(pos + 2) == OSEN_IE_VENDOR_TYPE) { 753 ie->osen = pos; 754 ie->osen_len = pos[1] + 2; 755 return 0; 756 } 757 758 if (pos + 1 + RSN_SELECTOR_LEN < end && 759 pos[1] >= RSN_SELECTOR_LEN + PMKID_LEN && 760 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_PMKID) { 761 ie->pmkid = pos + 2 + RSN_SELECTOR_LEN; 762 return 0; 763 } 764 765 if (pos[1] > RSN_SELECTOR_LEN + 2 && 766 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_GROUPKEY) { 767 ie->gtk = pos + 2 + RSN_SELECTOR_LEN; 768 ie->gtk_len = pos[1] - RSN_SELECTOR_LEN; 769 return 0; 770 } 771 772 if (pos[1] > RSN_SELECTOR_LEN + 2 && 773 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_MAC_ADDR) { 774 ie->mac_addr = pos + 2 + RSN_SELECTOR_LEN; 775 ie->mac_addr_len = pos[1] - RSN_SELECTOR_LEN; 776 return 0; 777 } 778 779 #ifdef CONFIG_PEERKEY 780 if (pos[1] > RSN_SELECTOR_LEN + 2 && 781 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_SMK) { 782 ie->smk = pos + 2 + RSN_SELECTOR_LEN; 783 ie->smk_len = pos[1] - RSN_SELECTOR_LEN; 784 return 0; 785 } 786 787 if (pos[1] > RSN_SELECTOR_LEN + 2 && 788 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_NONCE) { 789 ie->nonce = pos + 2 + RSN_SELECTOR_LEN; 790 ie->nonce_len = pos[1] - RSN_SELECTOR_LEN; 791 return 0; 792 } 793 794 if (pos[1] > RSN_SELECTOR_LEN + 2 && 795 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_LIFETIME) { 796 ie->lifetime = pos + 2 + RSN_SELECTOR_LEN; 797 ie->lifetime_len = pos[1] - RSN_SELECTOR_LEN; 798 return 0; 799 } 800 801 if (pos[1] > RSN_SELECTOR_LEN + 2 && 802 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_ERROR) { 803 ie->error = pos + 2 + RSN_SELECTOR_LEN; 804 ie->error_len = pos[1] - RSN_SELECTOR_LEN; 805 return 0; 806 } 807 #endif /* CONFIG_PEERKEY */ 808 809 #ifdef CONFIG_IEEE80211W 810 if (pos[1] > RSN_SELECTOR_LEN + 2 && 811 RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_IGTK) { 812 ie->igtk = pos + 2 + RSN_SELECTOR_LEN; 813 ie->igtk_len = pos[1] - RSN_SELECTOR_LEN; 814 return 0; 815 } 816 #endif /* CONFIG_IEEE80211W */ 817 818 #ifdef CONFIG_P2P 819 if (pos[1] >= RSN_SELECTOR_LEN + 1 && 820 RSN_SELECTOR_GET(pos + 2) == WFA_KEY_DATA_IP_ADDR_REQ) { 821 ie->ip_addr_req = pos + 2 + RSN_SELECTOR_LEN; 822 wpa_hexdump(MSG_DEBUG, "WPA: IP Address Request in EAPOL-Key", 823 ie->ip_addr_req, pos[1] - RSN_SELECTOR_LEN); 824 return 0; 825 } 826 827 if (pos[1] >= RSN_SELECTOR_LEN + 3 * 4 && 828 RSN_SELECTOR_GET(pos + 2) == WFA_KEY_DATA_IP_ADDR_ALLOC) { 829 ie->ip_addr_alloc = pos + 2 + RSN_SELECTOR_LEN; 830 wpa_hexdump(MSG_DEBUG, 831 "WPA: IP Address Allocation in EAPOL-Key", 832 ie->ip_addr_alloc, pos[1] - RSN_SELECTOR_LEN); 833 return 0; 834 } 835 #endif /* CONFIG_P2P */ 836 837 return 0; 838 } 839 840 841 /** 842 * wpa_parse_kde_ies - Parse EAPOL-Key Key Data IEs 843 * @buf: Pointer to the Key Data buffer 844 * @len: Key Data Length 845 * @ie: Pointer to parsed IE data 846 * Returns: 0 on success, -1 on failure 847 */ 848 int wpa_parse_kde_ies(const u8 *buf, size_t len, struct wpa_eapol_ie_parse *ie) 849 { 850 const u8 *pos, *end; 851 int ret = 0; 852 853 os_memset(ie, 0, sizeof(*ie)); 854 for (pos = buf, end = pos + len; pos + 1 < end; pos += 2 + pos[1]) { 855 if (pos[0] == 0xdd && 856 ((pos == buf + len - 1) || pos[1] == 0)) { 857 /* Ignore padding */ 858 break; 859 } 860 if (pos + 2 + pos[1] > end) { 861 wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key Key Data " 862 "underflow (ie=%d len=%d pos=%d)", 863 pos[0], pos[1], (int) (pos - buf)); 864 wpa_hexdump_key(MSG_DEBUG, "WPA: Key Data", 865 buf, len); 866 ret = -1; 867 break; 868 } 869 if (*pos == WLAN_EID_RSN) { 870 ie->rsn_ie = pos; 871 ie->rsn_ie_len = pos[1] + 2; 872 #ifdef CONFIG_IEEE80211R 873 } else if (*pos == WLAN_EID_MOBILITY_DOMAIN) { 874 ie->mdie = pos; 875 ie->mdie_len = pos[1] + 2; 876 } else if (*pos == WLAN_EID_FAST_BSS_TRANSITION) { 877 ie->ftie = pos; 878 ie->ftie_len = pos[1] + 2; 879 #endif /* CONFIG_IEEE80211R */ 880 } else if (*pos == WLAN_EID_VENDOR_SPECIFIC) { 881 ret = wpa_parse_generic(pos, end, ie); 882 if (ret < 0) 883 break; 884 if (ret > 0) { 885 ret = 0; 886 break; 887 } 888 } else { 889 wpa_hexdump(MSG_DEBUG, "WPA: Unrecognized EAPOL-Key " 890 "Key Data IE", pos, 2 + pos[1]); 891 } 892 } 893 894 return ret; 895 } 896 897 898 int wpa_auth_uses_mfp(struct wpa_state_machine *sm) 899 { 900 return sm ? sm->mgmt_frame_prot : 0; 901 } 902
