1 /* 2 * Wi-Fi Protected Setup - Registrar 3 * Copyright (c) 2008-2016, 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 "utils/includes.h" 10 11 #include "utils/common.h" 12 #include "utils/base64.h" 13 #include "utils/eloop.h" 14 #include "utils/uuid.h" 15 #include "utils/list.h" 16 #include "crypto/crypto.h" 17 #include "crypto/sha256.h" 18 #include "crypto/random.h" 19 #include "common/ieee802_11_defs.h" 20 #include "wps_i.h" 21 #include "wps_dev_attr.h" 22 #include "wps_upnp.h" 23 #include "wps_upnp_i.h" 24 25 #ifndef CONFIG_WPS_STRICT 26 #define WPS_WORKAROUNDS 27 #endif /* CONFIG_WPS_STRICT */ 28 29 #ifdef CONFIG_WPS_NFC 30 31 struct wps_nfc_pw_token { 32 struct dl_list list; 33 u8 pubkey_hash[WPS_OOB_PUBKEY_HASH_LEN]; 34 unsigned int peer_pk_hash_known:1; 35 u16 pw_id; 36 u8 dev_pw[WPS_OOB_DEVICE_PASSWORD_LEN * 2 + 1]; 37 size_t dev_pw_len; 38 int pk_hash_provided_oob; /* whether own PK hash was provided OOB */ 39 }; 40 41 42 static void wps_remove_nfc_pw_token(struct wps_nfc_pw_token *token) 43 { 44 dl_list_del(&token->list); 45 bin_clear_free(token, sizeof(*token)); 46 } 47 48 49 static void wps_free_nfc_pw_tokens(struct dl_list *tokens, u16 pw_id) 50 { 51 struct wps_nfc_pw_token *token, *prev; 52 dl_list_for_each_safe(token, prev, tokens, struct wps_nfc_pw_token, 53 list) { 54 if (pw_id == 0 || pw_id == token->pw_id) 55 wps_remove_nfc_pw_token(token); 56 } 57 } 58 59 60 static struct wps_nfc_pw_token * wps_get_nfc_pw_token(struct dl_list *tokens, 61 u16 pw_id) 62 { 63 struct wps_nfc_pw_token *token; 64 dl_list_for_each(token, tokens, struct wps_nfc_pw_token, list) { 65 if (pw_id == token->pw_id) 66 return token; 67 } 68 return NULL; 69 } 70 71 #else /* CONFIG_WPS_NFC */ 72 73 #define wps_free_nfc_pw_tokens(t, p) do { } while (0) 74 75 #endif /* CONFIG_WPS_NFC */ 76 77 78 struct wps_uuid_pin { 79 struct dl_list list; 80 u8 uuid[WPS_UUID_LEN]; 81 int wildcard_uuid; 82 u8 *pin; 83 size_t pin_len; 84 #define PIN_LOCKED BIT(0) 85 #define PIN_EXPIRES BIT(1) 86 int flags; 87 struct os_reltime expiration; 88 u8 enrollee_addr[ETH_ALEN]; 89 }; 90 91 92 static void wps_free_pin(struct wps_uuid_pin *pin) 93 { 94 bin_clear_free(pin->pin, pin->pin_len); 95 os_free(pin); 96 } 97 98 99 static void wps_remove_pin(struct wps_uuid_pin *pin) 100 { 101 dl_list_del(&pin->list); 102 wps_free_pin(pin); 103 } 104 105 106 static void wps_free_pins(struct dl_list *pins) 107 { 108 struct wps_uuid_pin *pin, *prev; 109 dl_list_for_each_safe(pin, prev, pins, struct wps_uuid_pin, list) 110 wps_remove_pin(pin); 111 } 112 113 114 struct wps_pbc_session { 115 struct wps_pbc_session *next; 116 u8 addr[ETH_ALEN]; 117 u8 uuid_e[WPS_UUID_LEN]; 118 struct os_reltime timestamp; 119 }; 120 121 122 static void wps_free_pbc_sessions(struct wps_pbc_session *pbc) 123 { 124 struct wps_pbc_session *prev; 125 126 while (pbc) { 127 prev = pbc; 128 pbc = pbc->next; 129 os_free(prev); 130 } 131 } 132 133 134 struct wps_registrar_device { 135 struct wps_registrar_device *next; 136 struct wps_device_data dev; 137 u8 uuid[WPS_UUID_LEN]; 138 }; 139 140 141 struct wps_registrar { 142 struct wps_context *wps; 143 144 int pbc; 145 int selected_registrar; 146 147 int (*new_psk_cb)(void *ctx, const u8 *mac_addr, const u8 *p2p_dev_addr, 148 const u8 *psk, size_t psk_len); 149 int (*set_ie_cb)(void *ctx, struct wpabuf *beacon_ie, 150 struct wpabuf *probe_resp_ie); 151 void (*pin_needed_cb)(void *ctx, const u8 *uuid_e, 152 const struct wps_device_data *dev); 153 void (*reg_success_cb)(void *ctx, const u8 *mac_addr, 154 const u8 *uuid_e, const u8 *dev_pw, 155 size_t dev_pw_len); 156 void (*set_sel_reg_cb)(void *ctx, int sel_reg, u16 dev_passwd_id, 157 u16 sel_reg_config_methods); 158 void (*enrollee_seen_cb)(void *ctx, const u8 *addr, const u8 *uuid_e, 159 const u8 *pri_dev_type, u16 config_methods, 160 u16 dev_password_id, u8 request_type, 161 const char *dev_name); 162 void *cb_ctx; 163 164 struct dl_list pins; 165 struct dl_list nfc_pw_tokens; 166 struct wps_pbc_session *pbc_sessions; 167 168 int skip_cred_build; 169 struct wpabuf *extra_cred; 170 int disable_auto_conf; 171 int sel_reg_union; 172 int sel_reg_dev_password_id_override; 173 int sel_reg_config_methods_override; 174 int static_wep_only; 175 int dualband; 176 int force_per_enrollee_psk; 177 178 struct wps_registrar_device *devices; 179 180 int force_pbc_overlap; 181 182 u8 authorized_macs[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN]; 183 u8 authorized_macs_union[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN]; 184 185 u8 p2p_dev_addr[ETH_ALEN]; 186 187 u8 pbc_ignore_uuid[WPS_UUID_LEN]; 188 #ifdef WPS_WORKAROUNDS 189 struct os_reltime pbc_ignore_start; 190 #endif /* WPS_WORKAROUNDS */ 191 }; 192 193 194 static int wps_set_ie(struct wps_registrar *reg); 195 static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx); 196 static void wps_registrar_set_selected_timeout(void *eloop_ctx, 197 void *timeout_ctx); 198 static void wps_registrar_remove_pin(struct wps_registrar *reg, 199 struct wps_uuid_pin *pin); 200 201 202 static void wps_registrar_add_authorized_mac(struct wps_registrar *reg, 203 const u8 *addr) 204 { 205 int i; 206 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC " MACSTR, 207 MAC2STR(addr)); 208 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) 209 if (os_memcmp(reg->authorized_macs[i], addr, ETH_ALEN) == 0) { 210 wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was " 211 "already in the list"); 212 return; /* already in list */ 213 } 214 for (i = WPS_MAX_AUTHORIZED_MACS - 1; i > 0; i--) 215 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i - 1], 216 ETH_ALEN); 217 os_memcpy(reg->authorized_macs[0], addr, ETH_ALEN); 218 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs", 219 (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs)); 220 } 221 222 223 static void wps_registrar_remove_authorized_mac(struct wps_registrar *reg, 224 const u8 *addr) 225 { 226 int i; 227 wpa_printf(MSG_DEBUG, "WPS: Remove authorized MAC " MACSTR, 228 MAC2STR(addr)); 229 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) { 230 if (os_memcmp(reg->authorized_macs, addr, ETH_ALEN) == 0) 231 break; 232 } 233 if (i == WPS_MAX_AUTHORIZED_MACS) { 234 wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was not in the " 235 "list"); 236 return; /* not in the list */ 237 } 238 for (; i + 1 < WPS_MAX_AUTHORIZED_MACS; i++) 239 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i + 1], 240 ETH_ALEN); 241 os_memset(reg->authorized_macs[WPS_MAX_AUTHORIZED_MACS - 1], 0, 242 ETH_ALEN); 243 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs", 244 (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs)); 245 } 246 247 248 static void wps_free_devices(struct wps_registrar_device *dev) 249 { 250 struct wps_registrar_device *prev; 251 252 while (dev) { 253 prev = dev; 254 dev = dev->next; 255 wps_device_data_free(&prev->dev); 256 os_free(prev); 257 } 258 } 259 260 261 static struct wps_registrar_device * wps_device_get(struct wps_registrar *reg, 262 const u8 *addr) 263 { 264 struct wps_registrar_device *dev; 265 266 for (dev = reg->devices; dev; dev = dev->next) { 267 if (os_memcmp(dev->dev.mac_addr, addr, ETH_ALEN) == 0) 268 return dev; 269 } 270 return NULL; 271 } 272 273 274 static void wps_device_clone_data(struct wps_device_data *dst, 275 struct wps_device_data *src) 276 { 277 os_memcpy(dst->mac_addr, src->mac_addr, ETH_ALEN); 278 os_memcpy(dst->pri_dev_type, src->pri_dev_type, WPS_DEV_TYPE_LEN); 279 280 #define WPS_STRDUP(n) \ 281 os_free(dst->n); \ 282 dst->n = src->n ? os_strdup(src->n) : NULL 283 284 WPS_STRDUP(device_name); 285 WPS_STRDUP(manufacturer); 286 WPS_STRDUP(model_name); 287 WPS_STRDUP(model_number); 288 WPS_STRDUP(serial_number); 289 #undef WPS_STRDUP 290 } 291 292 293 int wps_device_store(struct wps_registrar *reg, 294 struct wps_device_data *dev, const u8 *uuid) 295 { 296 struct wps_registrar_device *d; 297 298 d = wps_device_get(reg, dev->mac_addr); 299 if (d == NULL) { 300 d = os_zalloc(sizeof(*d)); 301 if (d == NULL) 302 return -1; 303 d->next = reg->devices; 304 reg->devices = d; 305 } 306 307 wps_device_clone_data(&d->dev, dev); 308 os_memcpy(d->uuid, uuid, WPS_UUID_LEN); 309 310 return 0; 311 } 312 313 314 static void wps_registrar_add_pbc_session(struct wps_registrar *reg, 315 const u8 *addr, const u8 *uuid_e) 316 { 317 struct wps_pbc_session *pbc, *prev = NULL; 318 struct os_reltime now; 319 320 os_get_reltime(&now); 321 322 pbc = reg->pbc_sessions; 323 while (pbc) { 324 if (os_memcmp(pbc->addr, addr, ETH_ALEN) == 0 && 325 os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0) { 326 if (prev) 327 prev->next = pbc->next; 328 else 329 reg->pbc_sessions = pbc->next; 330 break; 331 } 332 prev = pbc; 333 pbc = pbc->next; 334 } 335 336 if (!pbc) { 337 pbc = os_zalloc(sizeof(*pbc)); 338 if (pbc == NULL) 339 return; 340 os_memcpy(pbc->addr, addr, ETH_ALEN); 341 if (uuid_e) 342 os_memcpy(pbc->uuid_e, uuid_e, WPS_UUID_LEN); 343 } 344 345 pbc->next = reg->pbc_sessions; 346 reg->pbc_sessions = pbc; 347 pbc->timestamp = now; 348 349 /* remove entries that have timed out */ 350 prev = pbc; 351 pbc = pbc->next; 352 353 while (pbc) { 354 if (os_reltime_expired(&now, &pbc->timestamp, 355 WPS_PBC_WALK_TIME)) { 356 prev->next = NULL; 357 wps_free_pbc_sessions(pbc); 358 break; 359 } 360 prev = pbc; 361 pbc = pbc->next; 362 } 363 } 364 365 366 static void wps_registrar_remove_pbc_session(struct wps_registrar *reg, 367 const u8 *uuid_e, 368 const u8 *p2p_dev_addr) 369 { 370 struct wps_pbc_session *pbc, *prev = NULL, *tmp; 371 372 pbc = reg->pbc_sessions; 373 while (pbc) { 374 if (os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0 || 375 (p2p_dev_addr && !is_zero_ether_addr(reg->p2p_dev_addr) && 376 os_memcmp(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN) == 377 0)) { 378 if (prev) 379 prev->next = pbc->next; 380 else 381 reg->pbc_sessions = pbc->next; 382 tmp = pbc; 383 pbc = pbc->next; 384 wpa_printf(MSG_DEBUG, "WPS: Removing PBC session for " 385 "addr=" MACSTR, MAC2STR(tmp->addr)); 386 wpa_hexdump(MSG_DEBUG, "WPS: Removed UUID-E", 387 tmp->uuid_e, WPS_UUID_LEN); 388 os_free(tmp); 389 continue; 390 } 391 prev = pbc; 392 pbc = pbc->next; 393 } 394 } 395 396 397 int wps_registrar_pbc_overlap(struct wps_registrar *reg, 398 const u8 *addr, const u8 *uuid_e) 399 { 400 int count = 0; 401 struct wps_pbc_session *pbc; 402 struct wps_pbc_session *first = NULL; 403 struct os_reltime now; 404 405 os_get_reltime(&now); 406 407 wpa_printf(MSG_DEBUG, "WPS: Checking active PBC sessions for overlap"); 408 409 if (uuid_e) { 410 wpa_printf(MSG_DEBUG, "WPS: Add one for the requested UUID"); 411 wpa_hexdump(MSG_DEBUG, "WPS: Requested UUID", 412 uuid_e, WPS_UUID_LEN); 413 count++; 414 } 415 416 for (pbc = reg->pbc_sessions; pbc; pbc = pbc->next) { 417 wpa_printf(MSG_DEBUG, "WPS: Consider PBC session with " MACSTR, 418 MAC2STR(pbc->addr)); 419 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", 420 pbc->uuid_e, WPS_UUID_LEN); 421 if (os_reltime_expired(&now, &pbc->timestamp, 422 WPS_PBC_WALK_TIME)) { 423 wpa_printf(MSG_DEBUG, "WPS: PBC walk time has expired"); 424 break; 425 } 426 if (first && 427 os_memcmp(pbc->uuid_e, first->uuid_e, WPS_UUID_LEN) == 0) { 428 wpa_printf(MSG_DEBUG, "WPS: Same Enrollee"); 429 continue; /* same Enrollee */ 430 } 431 if (uuid_e == NULL || 432 os_memcmp(uuid_e, pbc->uuid_e, WPS_UUID_LEN)) { 433 wpa_printf(MSG_DEBUG, "WPS: New Enrollee"); 434 count++; 435 } 436 if (first == NULL) 437 first = pbc; 438 } 439 440 wpa_printf(MSG_DEBUG, "WPS: %u active PBC session(s) found", count); 441 442 return count > 1 ? 1 : 0; 443 } 444 445 446 static int wps_build_wps_state(struct wps_context *wps, struct wpabuf *msg) 447 { 448 wpa_printf(MSG_DEBUG, "WPS: * Wi-Fi Protected Setup State (%d)", 449 wps->wps_state); 450 wpabuf_put_be16(msg, ATTR_WPS_STATE); 451 wpabuf_put_be16(msg, 1); 452 wpabuf_put_u8(msg, wps->wps_state); 453 return 0; 454 } 455 456 457 #ifdef CONFIG_WPS_UPNP 458 static void wps_registrar_free_pending_m2(struct wps_context *wps) 459 { 460 struct upnp_pending_message *p, *p2, *prev = NULL; 461 p = wps->upnp_msgs; 462 while (p) { 463 if (p->type == WPS_M2 || p->type == WPS_M2D) { 464 if (prev == NULL) 465 wps->upnp_msgs = p->next; 466 else 467 prev->next = p->next; 468 wpa_printf(MSG_DEBUG, "WPS UPnP: Drop pending M2/M2D"); 469 p2 = p; 470 p = p->next; 471 wpabuf_free(p2->msg); 472 os_free(p2); 473 continue; 474 } 475 prev = p; 476 p = p->next; 477 } 478 } 479 #endif /* CONFIG_WPS_UPNP */ 480 481 482 static int wps_build_ap_setup_locked(struct wps_context *wps, 483 struct wpabuf *msg) 484 { 485 if (wps->ap_setup_locked && wps->ap_setup_locked != 2) { 486 wpa_printf(MSG_DEBUG, "WPS: * AP Setup Locked"); 487 wpabuf_put_be16(msg, ATTR_AP_SETUP_LOCKED); 488 wpabuf_put_be16(msg, 1); 489 wpabuf_put_u8(msg, 1); 490 } 491 return 0; 492 } 493 494 495 static int wps_build_selected_registrar(struct wps_registrar *reg, 496 struct wpabuf *msg) 497 { 498 if (!reg->sel_reg_union) 499 return 0; 500 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar"); 501 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR); 502 wpabuf_put_be16(msg, 1); 503 wpabuf_put_u8(msg, 1); 504 return 0; 505 } 506 507 508 static int wps_build_sel_reg_dev_password_id(struct wps_registrar *reg, 509 struct wpabuf *msg) 510 { 511 u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT; 512 if (!reg->sel_reg_union) 513 return 0; 514 if (reg->sel_reg_dev_password_id_override >= 0) 515 id = reg->sel_reg_dev_password_id_override; 516 wpa_printf(MSG_DEBUG, "WPS: * Device Password ID (%d)", id); 517 wpabuf_put_be16(msg, ATTR_DEV_PASSWORD_ID); 518 wpabuf_put_be16(msg, 2); 519 wpabuf_put_be16(msg, id); 520 return 0; 521 } 522 523 524 static int wps_build_sel_pbc_reg_uuid_e(struct wps_registrar *reg, 525 struct wpabuf *msg) 526 { 527 u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT; 528 if (!reg->sel_reg_union) 529 return 0; 530 if (reg->sel_reg_dev_password_id_override >= 0) 531 id = reg->sel_reg_dev_password_id_override; 532 if (id != DEV_PW_PUSHBUTTON || !reg->dualband) 533 return 0; 534 return wps_build_uuid_e(msg, reg->wps->uuid); 535 } 536 537 538 static void wps_set_pushbutton(u16 *methods, u16 conf_methods) 539 { 540 *methods |= WPS_CONFIG_PUSHBUTTON; 541 if ((conf_methods & WPS_CONFIG_VIRT_PUSHBUTTON) == 542 WPS_CONFIG_VIRT_PUSHBUTTON) 543 *methods |= WPS_CONFIG_VIRT_PUSHBUTTON; 544 if ((conf_methods & WPS_CONFIG_PHY_PUSHBUTTON) == 545 WPS_CONFIG_PHY_PUSHBUTTON) 546 *methods |= WPS_CONFIG_PHY_PUSHBUTTON; 547 if ((*methods & WPS_CONFIG_VIRT_PUSHBUTTON) != 548 WPS_CONFIG_VIRT_PUSHBUTTON && 549 (*methods & WPS_CONFIG_PHY_PUSHBUTTON) != 550 WPS_CONFIG_PHY_PUSHBUTTON) { 551 /* 552 * Required to include virtual/physical flag, but we were not 553 * configured with push button type, so have to default to one 554 * of them. 555 */ 556 *methods |= WPS_CONFIG_PHY_PUSHBUTTON; 557 } 558 } 559 560 561 static int wps_build_sel_reg_config_methods(struct wps_registrar *reg, 562 struct wpabuf *msg) 563 { 564 u16 methods; 565 if (!reg->sel_reg_union) 566 return 0; 567 methods = reg->wps->config_methods; 568 methods &= ~WPS_CONFIG_PUSHBUTTON; 569 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 570 WPS_CONFIG_PHY_PUSHBUTTON); 571 if (reg->pbc) 572 wps_set_pushbutton(&methods, reg->wps->config_methods); 573 if (reg->sel_reg_config_methods_override >= 0) 574 methods = reg->sel_reg_config_methods_override; 575 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar Config Methods (%x)", 576 methods); 577 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR_CONFIG_METHODS); 578 wpabuf_put_be16(msg, 2); 579 wpabuf_put_be16(msg, methods); 580 return 0; 581 } 582 583 584 static int wps_build_probe_config_methods(struct wps_registrar *reg, 585 struct wpabuf *msg) 586 { 587 u16 methods; 588 /* 589 * These are the methods that the AP supports as an Enrollee for adding 590 * external Registrars. 591 */ 592 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 593 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 594 WPS_CONFIG_PHY_PUSHBUTTON); 595 wpa_printf(MSG_DEBUG, "WPS: * Config Methods (%x)", methods); 596 wpabuf_put_be16(msg, ATTR_CONFIG_METHODS); 597 wpabuf_put_be16(msg, 2); 598 wpabuf_put_be16(msg, methods); 599 return 0; 600 } 601 602 603 static int wps_build_config_methods_r(struct wps_registrar *reg, 604 struct wpabuf *msg) 605 { 606 return wps_build_config_methods(msg, reg->wps->config_methods); 607 } 608 609 610 const u8 * wps_authorized_macs(struct wps_registrar *reg, size_t *count) 611 { 612 *count = 0; 613 614 while (*count < WPS_MAX_AUTHORIZED_MACS) { 615 if (is_zero_ether_addr(reg->authorized_macs_union[*count])) 616 break; 617 (*count)++; 618 } 619 620 return (const u8 *) reg->authorized_macs_union; 621 } 622 623 624 /** 625 * wps_registrar_init - Initialize WPS Registrar data 626 * @wps: Pointer to longterm WPS context 627 * @cfg: Registrar configuration 628 * Returns: Pointer to allocated Registrar data or %NULL on failure 629 * 630 * This function is used to initialize WPS Registrar functionality. It can be 631 * used for a single Registrar run (e.g., when run in a supplicant) or multiple 632 * runs (e.g., when run as an internal Registrar in an AP). Caller is 633 * responsible for freeing the returned data with wps_registrar_deinit() when 634 * Registrar functionality is not needed anymore. 635 */ 636 struct wps_registrar * 637 wps_registrar_init(struct wps_context *wps, 638 const struct wps_registrar_config *cfg) 639 { 640 struct wps_registrar *reg = os_zalloc(sizeof(*reg)); 641 if (reg == NULL) 642 return NULL; 643 644 dl_list_init(®->pins); 645 dl_list_init(®->nfc_pw_tokens); 646 reg->wps = wps; 647 reg->new_psk_cb = cfg->new_psk_cb; 648 reg->set_ie_cb = cfg->set_ie_cb; 649 reg->pin_needed_cb = cfg->pin_needed_cb; 650 reg->reg_success_cb = cfg->reg_success_cb; 651 reg->set_sel_reg_cb = cfg->set_sel_reg_cb; 652 reg->enrollee_seen_cb = cfg->enrollee_seen_cb; 653 reg->cb_ctx = cfg->cb_ctx; 654 reg->skip_cred_build = cfg->skip_cred_build; 655 if (cfg->extra_cred) { 656 reg->extra_cred = wpabuf_alloc_copy(cfg->extra_cred, 657 cfg->extra_cred_len); 658 if (reg->extra_cred == NULL) { 659 os_free(reg); 660 return NULL; 661 } 662 } 663 reg->disable_auto_conf = cfg->disable_auto_conf; 664 reg->sel_reg_dev_password_id_override = -1; 665 reg->sel_reg_config_methods_override = -1; 666 reg->static_wep_only = cfg->static_wep_only; 667 reg->dualband = cfg->dualband; 668 reg->force_per_enrollee_psk = cfg->force_per_enrollee_psk; 669 670 if (wps_set_ie(reg)) { 671 wps_registrar_deinit(reg); 672 return NULL; 673 } 674 675 return reg; 676 } 677 678 679 void wps_registrar_flush(struct wps_registrar *reg) 680 { 681 if (reg == NULL) 682 return; 683 wps_free_pins(®->pins); 684 wps_free_nfc_pw_tokens(®->nfc_pw_tokens, 0); 685 wps_free_pbc_sessions(reg->pbc_sessions); 686 reg->pbc_sessions = NULL; 687 wps_free_devices(reg->devices); 688 reg->devices = NULL; 689 #ifdef WPS_WORKAROUNDS 690 reg->pbc_ignore_start.sec = 0; 691 #endif /* WPS_WORKAROUNDS */ 692 } 693 694 695 /** 696 * wps_registrar_deinit - Deinitialize WPS Registrar data 697 * @reg: Registrar data from wps_registrar_init() 698 */ 699 void wps_registrar_deinit(struct wps_registrar *reg) 700 { 701 if (reg == NULL) 702 return; 703 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 704 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 705 wps_registrar_flush(reg); 706 wpabuf_clear_free(reg->extra_cred); 707 os_free(reg); 708 } 709 710 711 static void wps_registrar_invalidate_unused(struct wps_registrar *reg) 712 { 713 struct wps_uuid_pin *pin; 714 715 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 716 if (pin->wildcard_uuid == 1 && !(pin->flags & PIN_LOCKED)) { 717 wpa_printf(MSG_DEBUG, "WPS: Invalidate previously " 718 "configured wildcard PIN"); 719 wps_registrar_remove_pin(reg, pin); 720 break; 721 } 722 } 723 } 724 725 726 /** 727 * wps_registrar_add_pin - Configure a new PIN for Registrar 728 * @reg: Registrar data from wps_registrar_init() 729 * @addr: Enrollee MAC address or %NULL if not known 730 * @uuid: UUID-E or %NULL for wildcard (any UUID) 731 * @pin: PIN (Device Password) 732 * @pin_len: Length of pin in octets 733 * @timeout: Time (in seconds) when the PIN will be invalidated; 0 = no timeout 734 * Returns: 0 on success, -1 on failure 735 */ 736 int wps_registrar_add_pin(struct wps_registrar *reg, const u8 *addr, 737 const u8 *uuid, const u8 *pin, size_t pin_len, 738 int timeout) 739 { 740 struct wps_uuid_pin *p; 741 742 p = os_zalloc(sizeof(*p)); 743 if (p == NULL) 744 return -1; 745 if (addr) 746 os_memcpy(p->enrollee_addr, addr, ETH_ALEN); 747 if (uuid == NULL) 748 p->wildcard_uuid = 1; 749 else 750 os_memcpy(p->uuid, uuid, WPS_UUID_LEN); 751 p->pin = os_memdup(pin, pin_len); 752 if (p->pin == NULL) { 753 os_free(p); 754 return -1; 755 } 756 p->pin_len = pin_len; 757 758 if (timeout) { 759 p->flags |= PIN_EXPIRES; 760 os_get_reltime(&p->expiration); 761 p->expiration.sec += timeout; 762 } 763 764 if (p->wildcard_uuid) 765 wps_registrar_invalidate_unused(reg); 766 767 dl_list_add(®->pins, &p->list); 768 769 wpa_printf(MSG_DEBUG, "WPS: A new PIN configured (timeout=%d)", 770 timeout); 771 wpa_hexdump(MSG_DEBUG, "WPS: UUID", uuid, WPS_UUID_LEN); 772 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: PIN", pin, pin_len); 773 reg->selected_registrar = 1; 774 reg->pbc = 0; 775 if (addr) 776 wps_registrar_add_authorized_mac(reg, addr); 777 else 778 wps_registrar_add_authorized_mac( 779 reg, (u8 *) "\xff\xff\xff\xff\xff\xff"); 780 wps_registrar_selected_registrar_changed(reg, 0); 781 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 782 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, 783 wps_registrar_set_selected_timeout, 784 reg, NULL); 785 786 return 0; 787 } 788 789 790 static void wps_registrar_remove_pin(struct wps_registrar *reg, 791 struct wps_uuid_pin *pin) 792 { 793 u8 *addr; 794 u8 bcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 795 796 if (is_zero_ether_addr(pin->enrollee_addr)) 797 addr = bcast; 798 else 799 addr = pin->enrollee_addr; 800 wps_registrar_remove_authorized_mac(reg, addr); 801 wps_remove_pin(pin); 802 wps_registrar_selected_registrar_changed(reg, 0); 803 } 804 805 806 static void wps_registrar_expire_pins(struct wps_registrar *reg) 807 { 808 struct wps_uuid_pin *pin, *prev; 809 struct os_reltime now; 810 811 os_get_reltime(&now); 812 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 813 { 814 if ((pin->flags & PIN_EXPIRES) && 815 os_reltime_before(&pin->expiration, &now)) { 816 wpa_hexdump(MSG_DEBUG, "WPS: Expired PIN for UUID", 817 pin->uuid, WPS_UUID_LEN); 818 wps_registrar_remove_pin(reg, pin); 819 } 820 } 821 } 822 823 824 /** 825 * wps_registrar_invalidate_wildcard_pin - Invalidate a wildcard PIN 826 * @reg: Registrar data from wps_registrar_init() 827 * @dev_pw: PIN to search for or %NULL to match any 828 * @dev_pw_len: Length of dev_pw in octets 829 * Returns: 0 on success, -1 if not wildcard PIN is enabled 830 */ 831 static int wps_registrar_invalidate_wildcard_pin(struct wps_registrar *reg, 832 const u8 *dev_pw, 833 size_t dev_pw_len) 834 { 835 struct wps_uuid_pin *pin, *prev; 836 837 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 838 { 839 if (dev_pw && pin->pin && 840 (dev_pw_len != pin->pin_len || 841 os_memcmp_const(dev_pw, pin->pin, dev_pw_len) != 0)) 842 continue; /* different PIN */ 843 if (pin->wildcard_uuid) { 844 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID", 845 pin->uuid, WPS_UUID_LEN); 846 wps_registrar_remove_pin(reg, pin); 847 return 0; 848 } 849 } 850 851 return -1; 852 } 853 854 855 /** 856 * wps_registrar_invalidate_pin - Invalidate a PIN for a specific UUID-E 857 * @reg: Registrar data from wps_registrar_init() 858 * @uuid: UUID-E 859 * Returns: 0 on success, -1 on failure (e.g., PIN not found) 860 */ 861 int wps_registrar_invalidate_pin(struct wps_registrar *reg, const u8 *uuid) 862 { 863 struct wps_uuid_pin *pin, *prev; 864 865 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 866 { 867 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 868 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID", 869 pin->uuid, WPS_UUID_LEN); 870 wps_registrar_remove_pin(reg, pin); 871 return 0; 872 } 873 } 874 875 return -1; 876 } 877 878 879 static const u8 * wps_registrar_get_pin(struct wps_registrar *reg, 880 const u8 *uuid, size_t *pin_len) 881 { 882 struct wps_uuid_pin *pin, *found = NULL; 883 int wildcard = 0; 884 885 wps_registrar_expire_pins(reg); 886 887 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 888 if (!pin->wildcard_uuid && 889 os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 890 found = pin; 891 break; 892 } 893 } 894 895 if (!found) { 896 /* Check for wildcard UUIDs since none of the UUID-specific 897 * PINs matched */ 898 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 899 if (pin->wildcard_uuid == 1 || 900 pin->wildcard_uuid == 2) { 901 wpa_printf(MSG_DEBUG, "WPS: Found a wildcard " 902 "PIN. Assigned it for this UUID-E"); 903 wildcard = 1; 904 os_memcpy(pin->uuid, uuid, WPS_UUID_LEN); 905 found = pin; 906 break; 907 } 908 } 909 } 910 911 if (!found) 912 return NULL; 913 914 /* 915 * Lock the PIN to avoid attacks based on concurrent re-use of the PIN 916 * that could otherwise avoid PIN invalidations. 917 */ 918 if (found->flags & PIN_LOCKED) { 919 wpa_printf(MSG_DEBUG, "WPS: Selected PIN locked - do not " 920 "allow concurrent re-use"); 921 return NULL; 922 } 923 *pin_len = found->pin_len; 924 found->flags |= PIN_LOCKED; 925 if (wildcard) 926 found->wildcard_uuid++; 927 return found->pin; 928 } 929 930 931 /** 932 * wps_registrar_unlock_pin - Unlock a PIN for a specific UUID-E 933 * @reg: Registrar data from wps_registrar_init() 934 * @uuid: UUID-E 935 * Returns: 0 on success, -1 on failure 936 * 937 * PINs are locked to enforce only one concurrent use. This function unlocks a 938 * PIN to allow it to be used again. If the specified PIN was configured using 939 * a wildcard UUID, it will be removed instead of allowing multiple uses. 940 */ 941 int wps_registrar_unlock_pin(struct wps_registrar *reg, const u8 *uuid) 942 { 943 struct wps_uuid_pin *pin; 944 945 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 946 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 947 if (pin->wildcard_uuid == 3) { 948 wpa_printf(MSG_DEBUG, "WPS: Invalidating used " 949 "wildcard PIN"); 950 return wps_registrar_invalidate_pin(reg, uuid); 951 } 952 pin->flags &= ~PIN_LOCKED; 953 return 0; 954 } 955 } 956 957 return -1; 958 } 959 960 961 static void wps_registrar_stop_pbc(struct wps_registrar *reg) 962 { 963 reg->selected_registrar = 0; 964 reg->pbc = 0; 965 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN); 966 wps_registrar_remove_authorized_mac(reg, 967 (u8 *) "\xff\xff\xff\xff\xff\xff"); 968 wps_registrar_selected_registrar_changed(reg, 0); 969 } 970 971 972 static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx) 973 { 974 struct wps_registrar *reg = eloop_ctx; 975 976 wpa_printf(MSG_DEBUG, "WPS: PBC timed out - disable PBC mode"); 977 wps_pbc_timeout_event(reg->wps); 978 wps_registrar_stop_pbc(reg); 979 } 980 981 982 /** 983 * wps_registrar_button_pushed - Notify Registrar that AP button was pushed 984 * @reg: Registrar data from wps_registrar_init() 985 * @p2p_dev_addr: Limit allowed PBC devices to the specified P2P device, %NULL 986 * indicates no such filtering 987 * Returns: 0 on success, -1 on failure, -2 on session overlap 988 * 989 * This function is called on an AP when a push button is pushed to activate 990 * PBC mode. The PBC mode will be stopped after walk time (2 minutes) timeout 991 * or when a PBC registration is completed. If more than one Enrollee in active 992 * PBC mode has been detected during the monitor time (previous 2 minutes), the 993 * PBC mode is not activated and -2 is returned to indicate session overlap. 994 * This is skipped if a specific Enrollee is selected. 995 */ 996 int wps_registrar_button_pushed(struct wps_registrar *reg, 997 const u8 *p2p_dev_addr) 998 { 999 if (p2p_dev_addr == NULL && 1000 wps_registrar_pbc_overlap(reg, NULL, NULL)) { 1001 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - do not start PBC " 1002 "mode"); 1003 wps_pbc_overlap_event(reg->wps); 1004 return -2; 1005 } 1006 wpa_printf(MSG_DEBUG, "WPS: Button pushed - PBC mode started"); 1007 reg->force_pbc_overlap = 0; 1008 reg->selected_registrar = 1; 1009 reg->pbc = 1; 1010 if (p2p_dev_addr) 1011 os_memcpy(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN); 1012 else 1013 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN); 1014 wps_registrar_add_authorized_mac(reg, 1015 (u8 *) "\xff\xff\xff\xff\xff\xff"); 1016 wps_registrar_selected_registrar_changed(reg, 0); 1017 1018 wps_pbc_active_event(reg->wps); 1019 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 1020 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 1021 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wps_registrar_pbc_timeout, 1022 reg, NULL); 1023 return 0; 1024 } 1025 1026 1027 static void wps_registrar_pbc_completed(struct wps_registrar *reg) 1028 { 1029 wpa_printf(MSG_DEBUG, "WPS: PBC completed - stopping PBC mode"); 1030 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 1031 wps_registrar_stop_pbc(reg); 1032 wps_pbc_disable_event(reg->wps); 1033 } 1034 1035 1036 static void wps_registrar_pin_completed(struct wps_registrar *reg) 1037 { 1038 wpa_printf(MSG_DEBUG, "WPS: PIN completed using internal Registrar"); 1039 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 1040 reg->selected_registrar = 0; 1041 wps_registrar_selected_registrar_changed(reg, 0); 1042 } 1043 1044 1045 void wps_registrar_complete(struct wps_registrar *registrar, const u8 *uuid_e, 1046 const u8 *dev_pw, size_t dev_pw_len) 1047 { 1048 if (registrar->pbc) { 1049 wps_registrar_remove_pbc_session(registrar, 1050 uuid_e, NULL); 1051 wps_registrar_pbc_completed(registrar); 1052 #ifdef WPS_WORKAROUNDS 1053 os_get_reltime(®istrar->pbc_ignore_start); 1054 #endif /* WPS_WORKAROUNDS */ 1055 os_memcpy(registrar->pbc_ignore_uuid, uuid_e, WPS_UUID_LEN); 1056 } else { 1057 wps_registrar_pin_completed(registrar); 1058 } 1059 1060 if (dev_pw && 1061 wps_registrar_invalidate_wildcard_pin(registrar, dev_pw, 1062 dev_pw_len) == 0) { 1063 wpa_hexdump_key(MSG_DEBUG, "WPS: Invalidated wildcard PIN", 1064 dev_pw, dev_pw_len); 1065 } 1066 } 1067 1068 1069 int wps_registrar_wps_cancel(struct wps_registrar *reg) 1070 { 1071 if (reg->pbc) { 1072 wpa_printf(MSG_DEBUG, "WPS: PBC is set - cancelling it"); 1073 wps_registrar_pbc_timeout(reg, NULL); 1074 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 1075 return 1; 1076 } else if (reg->selected_registrar) { 1077 /* PIN Method */ 1078 wpa_printf(MSG_DEBUG, "WPS: PIN is set - cancelling it"); 1079 wps_registrar_pin_completed(reg); 1080 wps_registrar_invalidate_wildcard_pin(reg, NULL, 0); 1081 return 1; 1082 } 1083 return 0; 1084 } 1085 1086 1087 /** 1088 * wps_registrar_probe_req_rx - Notify Registrar of Probe Request 1089 * @reg: Registrar data from wps_registrar_init() 1090 * @addr: MAC address of the Probe Request sender 1091 * @wps_data: WPS IE contents 1092 * 1093 * This function is called on an AP when a Probe Request with WPS IE is 1094 * received. This is used to track PBC mode use and to detect possible overlap 1095 * situation with other WPS APs. 1096 */ 1097 void wps_registrar_probe_req_rx(struct wps_registrar *reg, const u8 *addr, 1098 const struct wpabuf *wps_data, 1099 int p2p_wildcard) 1100 { 1101 struct wps_parse_attr attr; 1102 int skip_add = 0; 1103 1104 wpa_hexdump_buf(MSG_MSGDUMP, 1105 "WPS: Probe Request with WPS data received", 1106 wps_data); 1107 1108 if (wps_parse_msg(wps_data, &attr) < 0) 1109 return; 1110 1111 if (attr.config_methods == NULL) { 1112 wpa_printf(MSG_DEBUG, "WPS: No Config Methods attribute in " 1113 "Probe Request"); 1114 return; 1115 } 1116 1117 if (attr.dev_password_id == NULL) { 1118 wpa_printf(MSG_DEBUG, "WPS: No Device Password Id attribute " 1119 "in Probe Request"); 1120 return; 1121 } 1122 1123 if (reg->enrollee_seen_cb && attr.uuid_e && 1124 attr.primary_dev_type && attr.request_type && !p2p_wildcard) { 1125 char *dev_name = NULL; 1126 if (attr.dev_name) { 1127 dev_name = os_zalloc(attr.dev_name_len + 1); 1128 if (dev_name) { 1129 os_memcpy(dev_name, attr.dev_name, 1130 attr.dev_name_len); 1131 } 1132 } 1133 reg->enrollee_seen_cb(reg->cb_ctx, addr, attr.uuid_e, 1134 attr.primary_dev_type, 1135 WPA_GET_BE16(attr.config_methods), 1136 WPA_GET_BE16(attr.dev_password_id), 1137 *attr.request_type, dev_name); 1138 os_free(dev_name); 1139 } 1140 1141 if (WPA_GET_BE16(attr.dev_password_id) != DEV_PW_PUSHBUTTON) 1142 return; /* Not PBC */ 1143 1144 wpa_printf(MSG_DEBUG, "WPS: Probe Request for PBC received from " 1145 MACSTR, MAC2STR(addr)); 1146 if (attr.uuid_e == NULL) { 1147 wpa_printf(MSG_DEBUG, "WPS: Invalid Probe Request WPS IE: No " 1148 "UUID-E included"); 1149 return; 1150 } 1151 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E from Probe Request", attr.uuid_e, 1152 WPS_UUID_LEN); 1153 1154 #ifdef WPS_WORKAROUNDS 1155 if (reg->pbc_ignore_start.sec && 1156 os_memcmp(attr.uuid_e, reg->pbc_ignore_uuid, WPS_UUID_LEN) == 0) { 1157 struct os_reltime now, dur; 1158 os_get_reltime(&now); 1159 os_reltime_sub(&now, ®->pbc_ignore_start, &dur); 1160 if (dur.sec >= 0 && dur.sec < 5) { 1161 wpa_printf(MSG_DEBUG, "WPS: Ignore PBC activation " 1162 "based on Probe Request from the Enrollee " 1163 "that just completed PBC provisioning"); 1164 skip_add = 1; 1165 } else 1166 reg->pbc_ignore_start.sec = 0; 1167 } 1168 #endif /* WPS_WORKAROUNDS */ 1169 1170 if (!skip_add) 1171 wps_registrar_add_pbc_session(reg, addr, attr.uuid_e); 1172 if (wps_registrar_pbc_overlap(reg, addr, attr.uuid_e)) { 1173 wpa_printf(MSG_DEBUG, "WPS: PBC session overlap detected"); 1174 reg->force_pbc_overlap = 1; 1175 wps_pbc_overlap_event(reg->wps); 1176 } 1177 } 1178 1179 1180 int wps_cb_new_psk(struct wps_registrar *reg, const u8 *mac_addr, 1181 const u8 *p2p_dev_addr, const u8 *psk, size_t psk_len) 1182 { 1183 if (reg->new_psk_cb == NULL) 1184 return 0; 1185 1186 return reg->new_psk_cb(reg->cb_ctx, mac_addr, p2p_dev_addr, psk, 1187 psk_len); 1188 } 1189 1190 1191 static void wps_cb_pin_needed(struct wps_registrar *reg, const u8 *uuid_e, 1192 const struct wps_device_data *dev) 1193 { 1194 if (reg->pin_needed_cb == NULL) 1195 return; 1196 1197 reg->pin_needed_cb(reg->cb_ctx, uuid_e, dev); 1198 } 1199 1200 1201 static void wps_cb_reg_success(struct wps_registrar *reg, const u8 *mac_addr, 1202 const u8 *uuid_e, const u8 *dev_pw, 1203 size_t dev_pw_len) 1204 { 1205 if (reg->reg_success_cb == NULL) 1206 return; 1207 1208 reg->reg_success_cb(reg->cb_ctx, mac_addr, uuid_e, dev_pw, dev_pw_len); 1209 } 1210 1211 1212 static int wps_cb_set_ie(struct wps_registrar *reg, struct wpabuf *beacon_ie, 1213 struct wpabuf *probe_resp_ie) 1214 { 1215 return reg->set_ie_cb(reg->cb_ctx, beacon_ie, probe_resp_ie); 1216 } 1217 1218 1219 static void wps_cb_set_sel_reg(struct wps_registrar *reg) 1220 { 1221 u16 methods = 0; 1222 if (reg->set_sel_reg_cb == NULL) 1223 return; 1224 1225 if (reg->selected_registrar) { 1226 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 1227 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 1228 WPS_CONFIG_PHY_PUSHBUTTON); 1229 if (reg->pbc) 1230 wps_set_pushbutton(&methods, reg->wps->config_methods); 1231 } 1232 1233 wpa_printf(MSG_DEBUG, "WPS: wps_cb_set_sel_reg: sel_reg=%d " 1234 "config_methods=0x%x pbc=%d methods=0x%x", 1235 reg->selected_registrar, reg->wps->config_methods, 1236 reg->pbc, methods); 1237 1238 reg->set_sel_reg_cb(reg->cb_ctx, reg->selected_registrar, 1239 reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT, 1240 methods); 1241 } 1242 1243 1244 static int wps_set_ie(struct wps_registrar *reg) 1245 { 1246 struct wpabuf *beacon; 1247 struct wpabuf *probe; 1248 const u8 *auth_macs; 1249 size_t count; 1250 size_t vendor_len = 0; 1251 int i; 1252 1253 if (reg->set_ie_cb == NULL) 1254 return 0; 1255 1256 for (i = 0; i < MAX_WPS_VENDOR_EXTENSIONS; i++) { 1257 if (reg->wps->dev.vendor_ext[i]) { 1258 vendor_len += 2 + 2; 1259 vendor_len += wpabuf_len(reg->wps->dev.vendor_ext[i]); 1260 } 1261 } 1262 1263 beacon = wpabuf_alloc(400 + vendor_len); 1264 if (beacon == NULL) 1265 return -1; 1266 probe = wpabuf_alloc(500 + vendor_len); 1267 if (probe == NULL) { 1268 wpabuf_free(beacon); 1269 return -1; 1270 } 1271 1272 auth_macs = wps_authorized_macs(reg, &count); 1273 1274 wpa_printf(MSG_DEBUG, "WPS: Build Beacon IEs"); 1275 1276 if (wps_build_version(beacon) || 1277 wps_build_wps_state(reg->wps, beacon) || 1278 wps_build_ap_setup_locked(reg->wps, beacon) || 1279 wps_build_selected_registrar(reg, beacon) || 1280 wps_build_sel_reg_dev_password_id(reg, beacon) || 1281 wps_build_sel_reg_config_methods(reg, beacon) || 1282 wps_build_sel_pbc_reg_uuid_e(reg, beacon) || 1283 (reg->dualband && wps_build_rf_bands(®->wps->dev, beacon, 0)) || 1284 wps_build_wfa_ext(beacon, 0, auth_macs, count) || 1285 wps_build_vendor_ext(®->wps->dev, beacon)) { 1286 wpabuf_free(beacon); 1287 wpabuf_free(probe); 1288 return -1; 1289 } 1290 1291 #ifdef CONFIG_P2P 1292 if (wps_build_dev_name(®->wps->dev, beacon) || 1293 wps_build_primary_dev_type(®->wps->dev, beacon)) { 1294 wpabuf_free(beacon); 1295 wpabuf_free(probe); 1296 return -1; 1297 } 1298 #endif /* CONFIG_P2P */ 1299 1300 wpa_printf(MSG_DEBUG, "WPS: Build Probe Response IEs"); 1301 1302 if (wps_build_version(probe) || 1303 wps_build_wps_state(reg->wps, probe) || 1304 wps_build_ap_setup_locked(reg->wps, probe) || 1305 wps_build_selected_registrar(reg, probe) || 1306 wps_build_sel_reg_dev_password_id(reg, probe) || 1307 wps_build_sel_reg_config_methods(reg, probe) || 1308 wps_build_resp_type(probe, reg->wps->ap ? WPS_RESP_AP : 1309 WPS_RESP_REGISTRAR) || 1310 wps_build_uuid_e(probe, reg->wps->uuid) || 1311 wps_build_device_attrs(®->wps->dev, probe) || 1312 wps_build_probe_config_methods(reg, probe) || 1313 (reg->dualband && wps_build_rf_bands(®->wps->dev, probe, 0)) || 1314 wps_build_wfa_ext(probe, 0, auth_macs, count) || 1315 wps_build_vendor_ext(®->wps->dev, probe)) { 1316 wpabuf_free(beacon); 1317 wpabuf_free(probe); 1318 return -1; 1319 } 1320 1321 beacon = wps_ie_encapsulate(beacon); 1322 probe = wps_ie_encapsulate(probe); 1323 1324 if (!beacon || !probe) { 1325 wpabuf_free(beacon); 1326 wpabuf_free(probe); 1327 return -1; 1328 } 1329 1330 if (reg->static_wep_only) { 1331 /* 1332 * Windows XP and Vista clients can get confused about 1333 * EAP-Identity/Request when they probe the network with 1334 * EAPOL-Start. In such a case, they may assume the network is 1335 * using IEEE 802.1X and prompt user for a certificate while 1336 * the correct (non-WPS) behavior would be to ask for the 1337 * static WEP key. As a workaround, use Microsoft Provisioning 1338 * IE to advertise that legacy 802.1X is not supported. 1339 */ 1340 const u8 ms_wps[7] = { 1341 WLAN_EID_VENDOR_SPECIFIC, 5, 1342 /* Microsoft Provisioning IE (00:50:f2:5) */ 1343 0x00, 0x50, 0xf2, 5, 1344 0x00 /* no legacy 802.1X or MS WPS */ 1345 }; 1346 wpa_printf(MSG_DEBUG, "WPS: Add Microsoft Provisioning IE " 1347 "into Beacon/Probe Response frames"); 1348 wpabuf_put_data(beacon, ms_wps, sizeof(ms_wps)); 1349 wpabuf_put_data(probe, ms_wps, sizeof(ms_wps)); 1350 } 1351 1352 return wps_cb_set_ie(reg, beacon, probe); 1353 } 1354 1355 1356 static int wps_get_dev_password(struct wps_data *wps) 1357 { 1358 const u8 *pin; 1359 size_t pin_len = 0; 1360 1361 bin_clear_free(wps->dev_password, wps->dev_password_len); 1362 wps->dev_password = NULL; 1363 1364 if (wps->pbc) { 1365 wpa_printf(MSG_DEBUG, "WPS: Use default PIN for PBC"); 1366 pin = (const u8 *) "00000000"; 1367 pin_len = 8; 1368 #ifdef CONFIG_WPS_NFC 1369 } else if (wps->nfc_pw_token) { 1370 if (wps->nfc_pw_token->pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) 1371 { 1372 wpa_printf(MSG_DEBUG, "WPS: Using NFC connection " 1373 "handover and abbreviated WPS handshake " 1374 "without Device Password"); 1375 return 0; 1376 } 1377 wpa_printf(MSG_DEBUG, "WPS: Use OOB Device Password from NFC " 1378 "Password Token"); 1379 pin = wps->nfc_pw_token->dev_pw; 1380 pin_len = wps->nfc_pw_token->dev_pw_len; 1381 } else if (wps->dev_pw_id >= 0x10 && 1382 wps->wps->ap_nfc_dev_pw_id == wps->dev_pw_id && 1383 wps->wps->ap_nfc_dev_pw) { 1384 wpa_printf(MSG_DEBUG, "WPS: Use OOB Device Password from own NFC Password Token"); 1385 pin = wpabuf_head(wps->wps->ap_nfc_dev_pw); 1386 pin_len = wpabuf_len(wps->wps->ap_nfc_dev_pw); 1387 #endif /* CONFIG_WPS_NFC */ 1388 } else { 1389 pin = wps_registrar_get_pin(wps->wps->registrar, wps->uuid_e, 1390 &pin_len); 1391 if (pin && wps->dev_pw_id >= 0x10) { 1392 wpa_printf(MSG_DEBUG, "WPS: No match for OOB Device " 1393 "Password ID, but PIN found"); 1394 /* 1395 * See whether Enrollee is willing to use PIN instead. 1396 */ 1397 wps->dev_pw_id = DEV_PW_DEFAULT; 1398 } 1399 } 1400 if (pin == NULL) { 1401 wpa_printf(MSG_DEBUG, "WPS: No Device Password available for " 1402 "the Enrollee (context %p registrar %p)", 1403 wps->wps, wps->wps->registrar); 1404 wps_cb_pin_needed(wps->wps->registrar, wps->uuid_e, 1405 &wps->peer_dev); 1406 return -1; 1407 } 1408 1409 wps->dev_password = os_memdup(pin, pin_len); 1410 if (wps->dev_password == NULL) 1411 return -1; 1412 wps->dev_password_len = pin_len; 1413 1414 return 0; 1415 } 1416 1417 1418 static int wps_build_uuid_r(struct wps_data *wps, struct wpabuf *msg) 1419 { 1420 wpa_printf(MSG_DEBUG, "WPS: * UUID-R"); 1421 wpabuf_put_be16(msg, ATTR_UUID_R); 1422 wpabuf_put_be16(msg, WPS_UUID_LEN); 1423 wpabuf_put_data(msg, wps->uuid_r, WPS_UUID_LEN); 1424 return 0; 1425 } 1426 1427 1428 static int wps_build_r_hash(struct wps_data *wps, struct wpabuf *msg) 1429 { 1430 u8 *hash; 1431 const u8 *addr[4]; 1432 size_t len[4]; 1433 1434 if (random_get_bytes(wps->snonce, 2 * WPS_SECRET_NONCE_LEN) < 0) 1435 return -1; 1436 wpa_hexdump(MSG_DEBUG, "WPS: R-S1", wps->snonce, WPS_SECRET_NONCE_LEN); 1437 wpa_hexdump(MSG_DEBUG, "WPS: R-S2", 1438 wps->snonce + WPS_SECRET_NONCE_LEN, WPS_SECRET_NONCE_LEN); 1439 1440 if (wps->dh_pubkey_e == NULL || wps->dh_pubkey_r == NULL) { 1441 wpa_printf(MSG_DEBUG, "WPS: DH public keys not available for " 1442 "R-Hash derivation"); 1443 return -1; 1444 } 1445 1446 wpa_printf(MSG_DEBUG, "WPS: * R-Hash1"); 1447 wpabuf_put_be16(msg, ATTR_R_HASH1); 1448 wpabuf_put_be16(msg, SHA256_MAC_LEN); 1449 hash = wpabuf_put(msg, SHA256_MAC_LEN); 1450 /* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */ 1451 addr[0] = wps->snonce; 1452 len[0] = WPS_SECRET_NONCE_LEN; 1453 addr[1] = wps->psk1; 1454 len[1] = WPS_PSK_LEN; 1455 addr[2] = wpabuf_head(wps->dh_pubkey_e); 1456 len[2] = wpabuf_len(wps->dh_pubkey_e); 1457 addr[3] = wpabuf_head(wps->dh_pubkey_r); 1458 len[3] = wpabuf_len(wps->dh_pubkey_r); 1459 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 1460 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash1", hash, SHA256_MAC_LEN); 1461 1462 wpa_printf(MSG_DEBUG, "WPS: * R-Hash2"); 1463 wpabuf_put_be16(msg, ATTR_R_HASH2); 1464 wpabuf_put_be16(msg, SHA256_MAC_LEN); 1465 hash = wpabuf_put(msg, SHA256_MAC_LEN); 1466 /* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */ 1467 addr[0] = wps->snonce + WPS_SECRET_NONCE_LEN; 1468 addr[1] = wps->psk2; 1469 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 1470 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash2", hash, SHA256_MAC_LEN); 1471 1472 return 0; 1473 } 1474 1475 1476 static int wps_build_r_snonce1(struct wps_data *wps, struct wpabuf *msg) 1477 { 1478 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce1"); 1479 wpabuf_put_be16(msg, ATTR_R_SNONCE1); 1480 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN); 1481 wpabuf_put_data(msg, wps->snonce, WPS_SECRET_NONCE_LEN); 1482 return 0; 1483 } 1484 1485 1486 static int wps_build_r_snonce2(struct wps_data *wps, struct wpabuf *msg) 1487 { 1488 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce2"); 1489 wpabuf_put_be16(msg, ATTR_R_SNONCE2); 1490 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN); 1491 wpabuf_put_data(msg, wps->snonce + WPS_SECRET_NONCE_LEN, 1492 WPS_SECRET_NONCE_LEN); 1493 return 0; 1494 } 1495 1496 1497 static int wps_build_cred_network_idx(struct wpabuf *msg, 1498 const struct wps_credential *cred) 1499 { 1500 wpa_printf(MSG_DEBUG, "WPS: * Network Index (1)"); 1501 wpabuf_put_be16(msg, ATTR_NETWORK_INDEX); 1502 wpabuf_put_be16(msg, 1); 1503 wpabuf_put_u8(msg, 1); 1504 return 0; 1505 } 1506 1507 1508 static int wps_build_cred_ssid(struct wpabuf *msg, 1509 const struct wps_credential *cred) 1510 { 1511 wpa_printf(MSG_DEBUG, "WPS: * SSID"); 1512 wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID for Credential", 1513 cred->ssid, cred->ssid_len); 1514 wpabuf_put_be16(msg, ATTR_SSID); 1515 wpabuf_put_be16(msg, cred->ssid_len); 1516 wpabuf_put_data(msg, cred->ssid, cred->ssid_len); 1517 return 0; 1518 } 1519 1520 1521 static int wps_build_cred_auth_type(struct wpabuf *msg, 1522 const struct wps_credential *cred) 1523 { 1524 wpa_printf(MSG_DEBUG, "WPS: * Authentication Type (0x%x)", 1525 cred->auth_type); 1526 wpabuf_put_be16(msg, ATTR_AUTH_TYPE); 1527 wpabuf_put_be16(msg, 2); 1528 wpabuf_put_be16(msg, cred->auth_type); 1529 return 0; 1530 } 1531 1532 1533 static int wps_build_cred_encr_type(struct wpabuf *msg, 1534 const struct wps_credential *cred) 1535 { 1536 wpa_printf(MSG_DEBUG, "WPS: * Encryption Type (0x%x)", 1537 cred->encr_type); 1538 wpabuf_put_be16(msg, ATTR_ENCR_TYPE); 1539 wpabuf_put_be16(msg, 2); 1540 wpabuf_put_be16(msg, cred->encr_type); 1541 return 0; 1542 } 1543 1544 1545 static int wps_build_cred_network_key(struct wpabuf *msg, 1546 const struct wps_credential *cred) 1547 { 1548 wpa_printf(MSG_DEBUG, "WPS: * Network Key (len=%d)", 1549 (int) cred->key_len); 1550 wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key", 1551 cred->key, cred->key_len); 1552 wpabuf_put_be16(msg, ATTR_NETWORK_KEY); 1553 wpabuf_put_be16(msg, cred->key_len); 1554 wpabuf_put_data(msg, cred->key, cred->key_len); 1555 return 0; 1556 } 1557 1558 1559 static int wps_build_credential(struct wpabuf *msg, 1560 const struct wps_credential *cred) 1561 { 1562 if (wps_build_cred_network_idx(msg, cred) || 1563 wps_build_cred_ssid(msg, cred) || 1564 wps_build_cred_auth_type(msg, cred) || 1565 wps_build_cred_encr_type(msg, cred) || 1566 wps_build_cred_network_key(msg, cred) || 1567 wps_build_mac_addr(msg, cred->mac_addr)) 1568 return -1; 1569 return 0; 1570 } 1571 1572 1573 int wps_build_credential_wrap(struct wpabuf *msg, 1574 const struct wps_credential *cred) 1575 { 1576 struct wpabuf *wbuf; 1577 wbuf = wpabuf_alloc(200); 1578 if (wbuf == NULL) 1579 return -1; 1580 if (wps_build_credential(wbuf, cred)) { 1581 wpabuf_clear_free(wbuf); 1582 return -1; 1583 } 1584 wpabuf_put_be16(msg, ATTR_CRED); 1585 wpabuf_put_be16(msg, wpabuf_len(wbuf)); 1586 wpabuf_put_buf(msg, wbuf); 1587 wpabuf_clear_free(wbuf); 1588 return 0; 1589 } 1590 1591 1592 int wps_build_cred(struct wps_data *wps, struct wpabuf *msg) 1593 { 1594 struct wpabuf *cred; 1595 1596 if (wps->wps->registrar->skip_cred_build) 1597 goto skip_cred_build; 1598 1599 wpa_printf(MSG_DEBUG, "WPS: * Credential"); 1600 if (wps->use_cred) { 1601 os_memcpy(&wps->cred, wps->use_cred, sizeof(wps->cred)); 1602 goto use_provided; 1603 } 1604 os_memset(&wps->cred, 0, sizeof(wps->cred)); 1605 1606 os_memcpy(wps->cred.ssid, wps->wps->ssid, wps->wps->ssid_len); 1607 wps->cred.ssid_len = wps->wps->ssid_len; 1608 1609 /* Select the best authentication and encryption type */ 1610 wpa_printf(MSG_DEBUG, 1611 "WPS: Own auth types 0x%x - masked Enrollee auth types 0x%x", 1612 wps->wps->auth_types, wps->auth_type); 1613 if (wps->auth_type & WPS_AUTH_WPA2PSK) 1614 wps->auth_type = WPS_AUTH_WPA2PSK; 1615 else if (wps->auth_type & WPS_AUTH_WPAPSK) 1616 wps->auth_type = WPS_AUTH_WPAPSK; 1617 else if (wps->auth_type & WPS_AUTH_OPEN) 1618 wps->auth_type = WPS_AUTH_OPEN; 1619 else { 1620 wpa_printf(MSG_DEBUG, "WPS: Unsupported auth_type 0x%x", 1621 wps->auth_type); 1622 return -1; 1623 } 1624 wps->cred.auth_type = wps->auth_type; 1625 1626 wpa_printf(MSG_DEBUG, 1627 "WPS: Own encr types 0x%x (rsn: 0x%x, wpa: 0x%x) - masked Enrollee encr types 0x%x", 1628 wps->wps->encr_types, wps->wps->encr_types_rsn, 1629 wps->wps->encr_types_wpa, wps->encr_type); 1630 if (wps->wps->ap && wps->auth_type == WPS_AUTH_WPA2PSK) 1631 wps->encr_type &= wps->wps->encr_types_rsn; 1632 else if (wps->wps->ap && wps->auth_type == WPS_AUTH_WPAPSK) 1633 wps->encr_type &= wps->wps->encr_types_wpa; 1634 if (wps->auth_type == WPS_AUTH_WPA2PSK || 1635 wps->auth_type == WPS_AUTH_WPAPSK) { 1636 if (wps->encr_type & WPS_ENCR_AES) 1637 wps->encr_type = WPS_ENCR_AES; 1638 else if (wps->encr_type & WPS_ENCR_TKIP) 1639 wps->encr_type = WPS_ENCR_TKIP; 1640 else { 1641 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption " 1642 "type for WPA/WPA2"); 1643 return -1; 1644 } 1645 } else { 1646 if (wps->encr_type & WPS_ENCR_NONE) 1647 wps->encr_type = WPS_ENCR_NONE; 1648 #ifdef CONFIG_TESTING_OPTIONS 1649 else if (wps->encr_type & WPS_ENCR_WEP) 1650 wps->encr_type = WPS_ENCR_WEP; 1651 #endif /* CONFIG_TESTING_OPTIONS */ 1652 else { 1653 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption " 1654 "type for non-WPA/WPA2 mode"); 1655 return -1; 1656 } 1657 } 1658 wps->cred.encr_type = wps->encr_type; 1659 /* 1660 * Set MAC address in the Credential to be the Enrollee's MAC address 1661 */ 1662 os_memcpy(wps->cred.mac_addr, wps->mac_addr_e, ETH_ALEN); 1663 1664 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->wps->ap && 1665 !wps->wps->registrar->disable_auto_conf) { 1666 u8 r[16]; 1667 /* Generate a random passphrase */ 1668 if (random_pool_ready() != 1 || 1669 random_get_bytes(r, sizeof(r)) < 0) { 1670 wpa_printf(MSG_INFO, 1671 "WPS: Could not generate random PSK"); 1672 return -1; 1673 } 1674 os_free(wps->new_psk); 1675 wps->new_psk = base64_encode(r, sizeof(r), &wps->new_psk_len); 1676 if (wps->new_psk == NULL) 1677 return -1; 1678 wps->new_psk_len--; /* remove newline */ 1679 while (wps->new_psk_len && 1680 wps->new_psk[wps->new_psk_len - 1] == '=') 1681 wps->new_psk_len--; 1682 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Generated passphrase", 1683 wps->new_psk, wps->new_psk_len); 1684 os_memcpy(wps->cred.key, wps->new_psk, wps->new_psk_len); 1685 wps->cred.key_len = wps->new_psk_len; 1686 } else if (!wps->wps->registrar->force_per_enrollee_psk && 1687 wps->use_psk_key && wps->wps->psk_set) { 1688 char hex[65]; 1689 wpa_printf(MSG_DEBUG, "WPS: Use PSK format for Network Key"); 1690 wpa_snprintf_hex(hex, sizeof(hex), wps->wps->psk, 32); 1691 os_memcpy(wps->cred.key, hex, 32 * 2); 1692 wps->cred.key_len = 32 * 2; 1693 } else if (!wps->wps->registrar->force_per_enrollee_psk && 1694 wps->wps->network_key) { 1695 os_memcpy(wps->cred.key, wps->wps->network_key, 1696 wps->wps->network_key_len); 1697 wps->cred.key_len = wps->wps->network_key_len; 1698 } else if (wps->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) { 1699 char hex[65]; 1700 /* Generate a random per-device PSK */ 1701 os_free(wps->new_psk); 1702 wps->new_psk_len = 32; 1703 wps->new_psk = os_malloc(wps->new_psk_len); 1704 if (wps->new_psk == NULL) 1705 return -1; 1706 if (random_pool_ready() != 1 || 1707 random_get_bytes(wps->new_psk, wps->new_psk_len) < 0) { 1708 wpa_printf(MSG_INFO, 1709 "WPS: Could not generate random PSK"); 1710 os_free(wps->new_psk); 1711 wps->new_psk = NULL; 1712 return -1; 1713 } 1714 wpa_hexdump_key(MSG_DEBUG, "WPS: Generated per-device PSK", 1715 wps->new_psk, wps->new_psk_len); 1716 wpa_snprintf_hex(hex, sizeof(hex), wps->new_psk, 1717 wps->new_psk_len); 1718 os_memcpy(wps->cred.key, hex, wps->new_psk_len * 2); 1719 wps->cred.key_len = wps->new_psk_len * 2; 1720 } 1721 1722 use_provided: 1723 #ifdef CONFIG_WPS_TESTING 1724 if (wps_testing_dummy_cred) 1725 cred = wpabuf_alloc(200); 1726 else 1727 cred = NULL; 1728 if (cred) { 1729 struct wps_credential dummy; 1730 wpa_printf(MSG_DEBUG, "WPS: Add dummy credential"); 1731 os_memset(&dummy, 0, sizeof(dummy)); 1732 os_memcpy(dummy.ssid, "dummy", 5); 1733 dummy.ssid_len = 5; 1734 dummy.auth_type = WPS_AUTH_WPA2PSK; 1735 dummy.encr_type = WPS_ENCR_AES; 1736 os_memcpy(dummy.key, "dummy psk", 9); 1737 dummy.key_len = 9; 1738 os_memcpy(dummy.mac_addr, wps->mac_addr_e, ETH_ALEN); 1739 wps_build_credential(cred, &dummy); 1740 wpa_hexdump_buf(MSG_DEBUG, "WPS: Dummy Credential", cred); 1741 1742 wpabuf_put_be16(msg, ATTR_CRED); 1743 wpabuf_put_be16(msg, wpabuf_len(cred)); 1744 wpabuf_put_buf(msg, cred); 1745 1746 wpabuf_free(cred); 1747 } 1748 #endif /* CONFIG_WPS_TESTING */ 1749 1750 cred = wpabuf_alloc(200); 1751 if (cred == NULL) 1752 return -1; 1753 1754 if (wps_build_credential(cred, &wps->cred)) { 1755 wpabuf_clear_free(cred); 1756 return -1; 1757 } 1758 1759 wpabuf_put_be16(msg, ATTR_CRED); 1760 wpabuf_put_be16(msg, wpabuf_len(cred)); 1761 wpabuf_put_buf(msg, cred); 1762 wpabuf_clear_free(cred); 1763 1764 skip_cred_build: 1765 if (wps->wps->registrar->extra_cred) { 1766 wpa_printf(MSG_DEBUG, "WPS: * Credential (pre-configured)"); 1767 wpabuf_put_buf(msg, wps->wps->registrar->extra_cred); 1768 } 1769 1770 return 0; 1771 } 1772 1773 1774 static int wps_build_ap_settings(struct wps_data *wps, struct wpabuf *msg) 1775 { 1776 wpa_printf(MSG_DEBUG, "WPS: * AP Settings"); 1777 1778 if (wps_build_credential(msg, &wps->cred)) 1779 return -1; 1780 1781 return 0; 1782 } 1783 1784 1785 static struct wpabuf * wps_build_ap_cred(struct wps_data *wps) 1786 { 1787 struct wpabuf *msg, *plain; 1788 1789 msg = wpabuf_alloc(1000); 1790 if (msg == NULL) 1791 return NULL; 1792 1793 plain = wpabuf_alloc(200); 1794 if (plain == NULL) { 1795 wpabuf_free(msg); 1796 return NULL; 1797 } 1798 1799 if (wps_build_ap_settings(wps, plain)) { 1800 wpabuf_clear_free(plain); 1801 wpabuf_free(msg); 1802 return NULL; 1803 } 1804 1805 wpabuf_put_be16(msg, ATTR_CRED); 1806 wpabuf_put_be16(msg, wpabuf_len(plain)); 1807 wpabuf_put_buf(msg, plain); 1808 wpabuf_clear_free(plain); 1809 1810 return msg; 1811 } 1812 1813 1814 static struct wpabuf * wps_build_m2(struct wps_data *wps) 1815 { 1816 struct wpabuf *msg; 1817 int config_in_m2 = 0; 1818 1819 if (random_get_bytes(wps->nonce_r, WPS_NONCE_LEN) < 0) 1820 return NULL; 1821 wpa_hexdump(MSG_DEBUG, "WPS: Registrar Nonce", 1822 wps->nonce_r, WPS_NONCE_LEN); 1823 wpa_hexdump(MSG_DEBUG, "WPS: UUID-R", wps->uuid_r, WPS_UUID_LEN); 1824 1825 wpa_printf(MSG_DEBUG, "WPS: Building Message M2"); 1826 msg = wpabuf_alloc(1000); 1827 if (msg == NULL) 1828 return NULL; 1829 1830 if (wps_build_version(msg) || 1831 wps_build_msg_type(msg, WPS_M2) || 1832 wps_build_enrollee_nonce(wps, msg) || 1833 wps_build_registrar_nonce(wps, msg) || 1834 wps_build_uuid_r(wps, msg) || 1835 wps_build_public_key(wps, msg) || 1836 wps_derive_keys(wps) || 1837 wps_build_auth_type_flags(wps, msg) || 1838 wps_build_encr_type_flags(wps, msg) || 1839 wps_build_conn_type_flags(wps, msg) || 1840 wps_build_config_methods_r(wps->wps->registrar, msg) || 1841 wps_build_device_attrs(&wps->wps->dev, msg) || 1842 wps_build_rf_bands(&wps->wps->dev, msg, 1843 wps->wps->rf_band_cb(wps->wps->cb_ctx)) || 1844 wps_build_assoc_state(wps, msg) || 1845 wps_build_config_error(msg, WPS_CFG_NO_ERROR) || 1846 wps_build_dev_password_id(msg, wps->dev_pw_id) || 1847 wps_build_os_version(&wps->wps->dev, msg) || 1848 wps_build_wfa_ext(msg, 0, NULL, 0)) { 1849 wpabuf_free(msg); 1850 return NULL; 1851 } 1852 1853 #ifdef CONFIG_WPS_NFC 1854 if (wps->nfc_pw_token && wps->nfc_pw_token->pk_hash_provided_oob && 1855 wps->nfc_pw_token->pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) { 1856 /* 1857 * Use abbreviated handshake since public key hash allowed 1858 * Enrollee to validate our public key similarly to how Enrollee 1859 * public key was validated. There is no need to validate Device 1860 * Password in this case. 1861 */ 1862 struct wpabuf *plain = wpabuf_alloc(500); 1863 if (plain == NULL || 1864 wps_build_cred(wps, plain) || 1865 wps_build_key_wrap_auth(wps, plain) || 1866 wps_build_encr_settings(wps, msg, plain)) { 1867 wpabuf_free(msg); 1868 wpabuf_clear_free(plain); 1869 return NULL; 1870 } 1871 wpabuf_clear_free(plain); 1872 config_in_m2 = 1; 1873 } 1874 #endif /* CONFIG_WPS_NFC */ 1875 1876 if (wps_build_authenticator(wps, msg)) { 1877 wpabuf_free(msg); 1878 return NULL; 1879 } 1880 1881 wps->int_reg = 1; 1882 wps->state = config_in_m2 ? RECV_DONE : RECV_M3; 1883 return msg; 1884 } 1885 1886 1887 static struct wpabuf * wps_build_m2d(struct wps_data *wps) 1888 { 1889 struct wpabuf *msg; 1890 u16 err = wps->config_error; 1891 1892 wpa_printf(MSG_DEBUG, "WPS: Building Message M2D"); 1893 msg = wpabuf_alloc(1000); 1894 if (msg == NULL) 1895 return NULL; 1896 1897 if (wps->wps->ap && wps->wps->ap_setup_locked && 1898 err == WPS_CFG_NO_ERROR) 1899 err = WPS_CFG_SETUP_LOCKED; 1900 1901 if (wps_build_version(msg) || 1902 wps_build_msg_type(msg, WPS_M2D) || 1903 wps_build_enrollee_nonce(wps, msg) || 1904 wps_build_registrar_nonce(wps, msg) || 1905 wps_build_uuid_r(wps, msg) || 1906 wps_build_auth_type_flags(wps, msg) || 1907 wps_build_encr_type_flags(wps, msg) || 1908 wps_build_conn_type_flags(wps, msg) || 1909 wps_build_config_methods_r(wps->wps->registrar, msg) || 1910 wps_build_device_attrs(&wps->wps->dev, msg) || 1911 wps_build_rf_bands(&wps->wps->dev, msg, 1912 wps->wps->rf_band_cb(wps->wps->cb_ctx)) || 1913 wps_build_assoc_state(wps, msg) || 1914 wps_build_config_error(msg, err) || 1915 wps_build_os_version(&wps->wps->dev, msg) || 1916 wps_build_wfa_ext(msg, 0, NULL, 0)) { 1917 wpabuf_free(msg); 1918 return NULL; 1919 } 1920 1921 wps->state = RECV_M2D_ACK; 1922 return msg; 1923 } 1924 1925 1926 static struct wpabuf * wps_build_m4(struct wps_data *wps) 1927 { 1928 struct wpabuf *msg, *plain; 1929 1930 wpa_printf(MSG_DEBUG, "WPS: Building Message M4"); 1931 1932 if (wps_derive_psk(wps, wps->dev_password, wps->dev_password_len) < 0) 1933 return NULL; 1934 1935 plain = wpabuf_alloc(200); 1936 if (plain == NULL) 1937 return NULL; 1938 1939 msg = wpabuf_alloc(1000); 1940 if (msg == NULL) { 1941 wpabuf_free(plain); 1942 return NULL; 1943 } 1944 1945 if (wps_build_version(msg) || 1946 wps_build_msg_type(msg, WPS_M4) || 1947 wps_build_enrollee_nonce(wps, msg) || 1948 wps_build_r_hash(wps, msg) || 1949 wps_build_r_snonce1(wps, plain) || 1950 wps_build_key_wrap_auth(wps, plain) || 1951 wps_build_encr_settings(wps, msg, plain) || 1952 wps_build_wfa_ext(msg, 0, NULL, 0) || 1953 wps_build_authenticator(wps, msg)) { 1954 wpabuf_clear_free(plain); 1955 wpabuf_free(msg); 1956 return NULL; 1957 } 1958 wpabuf_clear_free(plain); 1959 1960 wps->state = RECV_M5; 1961 return msg; 1962 } 1963 1964 1965 static struct wpabuf * wps_build_m6(struct wps_data *wps) 1966 { 1967 struct wpabuf *msg, *plain; 1968 1969 wpa_printf(MSG_DEBUG, "WPS: Building Message M6"); 1970 1971 plain = wpabuf_alloc(200); 1972 if (plain == NULL) 1973 return NULL; 1974 1975 msg = wpabuf_alloc(1000); 1976 if (msg == NULL) { 1977 wpabuf_free(plain); 1978 return NULL; 1979 } 1980 1981 if (wps_build_version(msg) || 1982 wps_build_msg_type(msg, WPS_M6) || 1983 wps_build_enrollee_nonce(wps, msg) || 1984 wps_build_r_snonce2(wps, plain) || 1985 wps_build_key_wrap_auth(wps, plain) || 1986 wps_build_encr_settings(wps, msg, plain) || 1987 wps_build_wfa_ext(msg, 0, NULL, 0) || 1988 wps_build_authenticator(wps, msg)) { 1989 wpabuf_clear_free(plain); 1990 wpabuf_free(msg); 1991 return NULL; 1992 } 1993 wpabuf_clear_free(plain); 1994 1995 wps->wps_pin_revealed = 1; 1996 wps->state = RECV_M7; 1997 return msg; 1998 } 1999 2000 2001 static struct wpabuf * wps_build_m8(struct wps_data *wps) 2002 { 2003 struct wpabuf *msg, *plain; 2004 2005 wpa_printf(MSG_DEBUG, "WPS: Building Message M8"); 2006 2007 plain = wpabuf_alloc(500); 2008 if (plain == NULL) 2009 return NULL; 2010 2011 msg = wpabuf_alloc(1000); 2012 if (msg == NULL) { 2013 wpabuf_free(plain); 2014 return NULL; 2015 } 2016 2017 if (wps_build_version(msg) || 2018 wps_build_msg_type(msg, WPS_M8) || 2019 wps_build_enrollee_nonce(wps, msg) || 2020 ((wps->wps->ap || wps->er) && wps_build_cred(wps, plain)) || 2021 (!wps->wps->ap && !wps->er && wps_build_ap_settings(wps, plain)) || 2022 wps_build_key_wrap_auth(wps, plain) || 2023 wps_build_encr_settings(wps, msg, plain) || 2024 wps_build_wfa_ext(msg, 0, NULL, 0) || 2025 wps_build_authenticator(wps, msg)) { 2026 wpabuf_clear_free(plain); 2027 wpabuf_clear_free(msg); 2028 return NULL; 2029 } 2030 wpabuf_clear_free(plain); 2031 2032 wps->state = RECV_DONE; 2033 return msg; 2034 } 2035 2036 2037 struct wpabuf * wps_registrar_get_msg(struct wps_data *wps, 2038 enum wsc_op_code *op_code) 2039 { 2040 struct wpabuf *msg; 2041 2042 #ifdef CONFIG_WPS_UPNP 2043 if (!wps->int_reg && wps->wps->wps_upnp) { 2044 struct upnp_pending_message *p, *prev = NULL; 2045 if (wps->ext_reg > 1) 2046 wps_registrar_free_pending_m2(wps->wps); 2047 p = wps->wps->upnp_msgs; 2048 /* TODO: check pending message MAC address */ 2049 while (p && p->next) { 2050 prev = p; 2051 p = p->next; 2052 } 2053 if (p) { 2054 wpa_printf(MSG_DEBUG, "WPS: Use pending message from " 2055 "UPnP"); 2056 if (prev) 2057 prev->next = NULL; 2058 else 2059 wps->wps->upnp_msgs = NULL; 2060 msg = p->msg; 2061 switch (p->type) { 2062 case WPS_WSC_ACK: 2063 *op_code = WSC_ACK; 2064 break; 2065 case WPS_WSC_NACK: 2066 *op_code = WSC_NACK; 2067 break; 2068 default: 2069 *op_code = WSC_MSG; 2070 break; 2071 } 2072 os_free(p); 2073 if (wps->ext_reg == 0) 2074 wps->ext_reg = 1; 2075 return msg; 2076 } 2077 } 2078 if (wps->ext_reg) { 2079 wpa_printf(MSG_DEBUG, "WPS: Using external Registrar, but no " 2080 "pending message available"); 2081 return NULL; 2082 } 2083 #endif /* CONFIG_WPS_UPNP */ 2084 2085 switch (wps->state) { 2086 case SEND_M2: 2087 if (wps_get_dev_password(wps) < 0) 2088 msg = wps_build_m2d(wps); 2089 else 2090 msg = wps_build_m2(wps); 2091 *op_code = WSC_MSG; 2092 break; 2093 case SEND_M2D: 2094 msg = wps_build_m2d(wps); 2095 *op_code = WSC_MSG; 2096 break; 2097 case SEND_M4: 2098 msg = wps_build_m4(wps); 2099 *op_code = WSC_MSG; 2100 break; 2101 case SEND_M6: 2102 msg = wps_build_m6(wps); 2103 *op_code = WSC_MSG; 2104 break; 2105 case SEND_M8: 2106 msg = wps_build_m8(wps); 2107 *op_code = WSC_MSG; 2108 break; 2109 case RECV_DONE: 2110 msg = wps_build_wsc_ack(wps); 2111 *op_code = WSC_ACK; 2112 break; 2113 case SEND_WSC_NACK: 2114 msg = wps_build_wsc_nack(wps); 2115 *op_code = WSC_NACK; 2116 break; 2117 default: 2118 wpa_printf(MSG_DEBUG, "WPS: Unsupported state %d for building " 2119 "a message", wps->state); 2120 msg = NULL; 2121 break; 2122 } 2123 2124 if (*op_code == WSC_MSG && msg) { 2125 /* Save a copy of the last message for Authenticator derivation 2126 */ 2127 wpabuf_free(wps->last_msg); 2128 wps->last_msg = wpabuf_dup(msg); 2129 } 2130 2131 return msg; 2132 } 2133 2134 2135 static int wps_process_enrollee_nonce(struct wps_data *wps, const u8 *e_nonce) 2136 { 2137 if (e_nonce == NULL) { 2138 wpa_printf(MSG_DEBUG, "WPS: No Enrollee Nonce received"); 2139 return -1; 2140 } 2141 2142 os_memcpy(wps->nonce_e, e_nonce, WPS_NONCE_LEN); 2143 wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce", 2144 wps->nonce_e, WPS_NONCE_LEN); 2145 2146 return 0; 2147 } 2148 2149 2150 static int wps_process_registrar_nonce(struct wps_data *wps, const u8 *r_nonce) 2151 { 2152 if (r_nonce == NULL) { 2153 wpa_printf(MSG_DEBUG, "WPS: No Registrar Nonce received"); 2154 return -1; 2155 } 2156 2157 if (os_memcmp(wps->nonce_r, r_nonce, WPS_NONCE_LEN) != 0) { 2158 wpa_printf(MSG_DEBUG, "WPS: Invalid Registrar Nonce received"); 2159 return -1; 2160 } 2161 2162 return 0; 2163 } 2164 2165 2166 static int wps_process_uuid_e(struct wps_data *wps, const u8 *uuid_e) 2167 { 2168 if (uuid_e == NULL) { 2169 wpa_printf(MSG_DEBUG, "WPS: No UUID-E received"); 2170 return -1; 2171 } 2172 2173 os_memcpy(wps->uuid_e, uuid_e, WPS_UUID_LEN); 2174 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", wps->uuid_e, WPS_UUID_LEN); 2175 2176 return 0; 2177 } 2178 2179 2180 static int wps_process_dev_password_id(struct wps_data *wps, const u8 *pw_id) 2181 { 2182 if (pw_id == NULL) { 2183 wpa_printf(MSG_DEBUG, "WPS: No Device Password ID received"); 2184 return -1; 2185 } 2186 2187 wps->dev_pw_id = WPA_GET_BE16(pw_id); 2188 wpa_printf(MSG_DEBUG, "WPS: Device Password ID %d", wps->dev_pw_id); 2189 2190 return 0; 2191 } 2192 2193 2194 static int wps_process_e_hash1(struct wps_data *wps, const u8 *e_hash1) 2195 { 2196 if (e_hash1 == NULL) { 2197 wpa_printf(MSG_DEBUG, "WPS: No E-Hash1 received"); 2198 return -1; 2199 } 2200 2201 os_memcpy(wps->peer_hash1, e_hash1, WPS_HASH_LEN); 2202 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash1", wps->peer_hash1, WPS_HASH_LEN); 2203 2204 return 0; 2205 } 2206 2207 2208 static int wps_process_e_hash2(struct wps_data *wps, const u8 *e_hash2) 2209 { 2210 if (e_hash2 == NULL) { 2211 wpa_printf(MSG_DEBUG, "WPS: No E-Hash2 received"); 2212 return -1; 2213 } 2214 2215 os_memcpy(wps->peer_hash2, e_hash2, WPS_HASH_LEN); 2216 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash2", wps->peer_hash2, WPS_HASH_LEN); 2217 2218 return 0; 2219 } 2220 2221 2222 static int wps_process_e_snonce1(struct wps_data *wps, const u8 *e_snonce1) 2223 { 2224 u8 hash[SHA256_MAC_LEN]; 2225 const u8 *addr[4]; 2226 size_t len[4]; 2227 2228 if (e_snonce1 == NULL) { 2229 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce1 received"); 2230 return -1; 2231 } 2232 2233 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce1", e_snonce1, 2234 WPS_SECRET_NONCE_LEN); 2235 2236 /* E-Hash1 = HMAC_AuthKey(E-S1 || PSK1 || PK_E || PK_R) */ 2237 addr[0] = e_snonce1; 2238 len[0] = WPS_SECRET_NONCE_LEN; 2239 addr[1] = wps->psk1; 2240 len[1] = WPS_PSK_LEN; 2241 addr[2] = wpabuf_head(wps->dh_pubkey_e); 2242 len[2] = wpabuf_len(wps->dh_pubkey_e); 2243 addr[3] = wpabuf_head(wps->dh_pubkey_r); 2244 len[3] = wpabuf_len(wps->dh_pubkey_r); 2245 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 2246 2247 if (os_memcmp_const(wps->peer_hash1, hash, WPS_HASH_LEN) != 0) { 2248 wpa_printf(MSG_DEBUG, "WPS: E-Hash1 derived from E-S1 does " 2249 "not match with the pre-committed value"); 2250 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE; 2251 wps_pwd_auth_fail_event(wps->wps, 0, 1, wps->mac_addr_e); 2252 return -1; 2253 } 2254 2255 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the first " 2256 "half of the device password"); 2257 2258 return 0; 2259 } 2260 2261 2262 static int wps_process_e_snonce2(struct wps_data *wps, const u8 *e_snonce2) 2263 { 2264 u8 hash[SHA256_MAC_LEN]; 2265 const u8 *addr[4]; 2266 size_t len[4]; 2267 2268 if (e_snonce2 == NULL) { 2269 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce2 received"); 2270 return -1; 2271 } 2272 2273 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce2", e_snonce2, 2274 WPS_SECRET_NONCE_LEN); 2275 2276 /* E-Hash2 = HMAC_AuthKey(E-S2 || PSK2 || PK_E || PK_R) */ 2277 addr[0] = e_snonce2; 2278 len[0] = WPS_SECRET_NONCE_LEN; 2279 addr[1] = wps->psk2; 2280 len[1] = WPS_PSK_LEN; 2281 addr[2] = wpabuf_head(wps->dh_pubkey_e); 2282 len[2] = wpabuf_len(wps->dh_pubkey_e); 2283 addr[3] = wpabuf_head(wps->dh_pubkey_r); 2284 len[3] = wpabuf_len(wps->dh_pubkey_r); 2285 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 2286 2287 if (os_memcmp_const(wps->peer_hash2, hash, WPS_HASH_LEN) != 0) { 2288 wpa_printf(MSG_DEBUG, "WPS: E-Hash2 derived from E-S2 does " 2289 "not match with the pre-committed value"); 2290 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e); 2291 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE; 2292 wps_pwd_auth_fail_event(wps->wps, 0, 2, wps->mac_addr_e); 2293 return -1; 2294 } 2295 2296 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the second " 2297 "half of the device password"); 2298 wps->wps_pin_revealed = 0; 2299 wps_registrar_unlock_pin(wps->wps->registrar, wps->uuid_e); 2300 2301 /* 2302 * In case wildcard PIN is used and WPS handshake succeeds in the first 2303 * attempt, wps_registrar_unlock_pin() would not free the PIN, so make 2304 * sure the PIN gets invalidated here. 2305 */ 2306 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e); 2307 2308 return 0; 2309 } 2310 2311 2312 static int wps_process_mac_addr(struct wps_data *wps, const u8 *mac_addr) 2313 { 2314 if (mac_addr == NULL) { 2315 wpa_printf(MSG_DEBUG, "WPS: No MAC Address received"); 2316 return -1; 2317 } 2318 2319 wpa_printf(MSG_DEBUG, "WPS: Enrollee MAC Address " MACSTR, 2320 MAC2STR(mac_addr)); 2321 os_memcpy(wps->mac_addr_e, mac_addr, ETH_ALEN); 2322 os_memcpy(wps->peer_dev.mac_addr, mac_addr, ETH_ALEN); 2323 2324 return 0; 2325 } 2326 2327 2328 static int wps_process_pubkey(struct wps_data *wps, const u8 *pk, 2329 size_t pk_len) 2330 { 2331 if (pk == NULL || pk_len == 0) { 2332 wpa_printf(MSG_DEBUG, "WPS: No Public Key received"); 2333 return -1; 2334 } 2335 2336 wpabuf_free(wps->dh_pubkey_e); 2337 wps->dh_pubkey_e = wpabuf_alloc_copy(pk, pk_len); 2338 if (wps->dh_pubkey_e == NULL) 2339 return -1; 2340 2341 return 0; 2342 } 2343 2344 2345 static int wps_process_auth_type_flags(struct wps_data *wps, const u8 *auth) 2346 { 2347 u16 auth_types; 2348 2349 if (auth == NULL) { 2350 wpa_printf(MSG_DEBUG, "WPS: No Authentication Type flags " 2351 "received"); 2352 return -1; 2353 } 2354 2355 auth_types = WPA_GET_BE16(auth); 2356 2357 wpa_printf(MSG_DEBUG, "WPS: Enrollee Authentication Type flags 0x%x", 2358 auth_types); 2359 #ifdef WPS_WORKAROUNDS 2360 /* 2361 * Some deployed implementations seem to advertise incorrect information 2362 * in this attribute. A value of 0x1b (WPA2 + WPA + WPAPSK + OPEN, but 2363 * no WPA2PSK) has been reported to be used. Add WPA2PSK to the list to 2364 * avoid issues with building Credentials that do not use the strongest 2365 * actually supported authentication option (that device does support 2366 * WPA2PSK even when it does not claim it here). 2367 */ 2368 if ((auth_types & 2369 (WPS_AUTH_WPA2 | WPS_AUTH_WPA2PSK | WPS_AUTH_WPAPSK)) == 2370 (WPS_AUTH_WPA2 | WPS_AUTH_WPAPSK)) { 2371 wpa_printf(MSG_DEBUG, 2372 "WPS: Workaround - assume Enrollee supports WPA2PSK based on claimed WPA2 support"); 2373 auth_types |= WPS_AUTH_WPA2PSK; 2374 } 2375 #endif /* WPS_WORKAROUNDS */ 2376 wps->auth_type = wps->wps->auth_types & auth_types; 2377 if (wps->auth_type == 0) { 2378 wpa_printf(MSG_DEBUG, "WPS: No match in supported " 2379 "authentication types (own 0x%x Enrollee 0x%x)", 2380 wps->wps->auth_types, auth_types); 2381 #ifdef WPS_WORKAROUNDS 2382 /* 2383 * Some deployed implementations seem to advertise incorrect 2384 * information in this attribute. For example, Linksys WRT350N 2385 * seems to have a byteorder bug that breaks this negotiation. 2386 * In order to interoperate with existing implementations, 2387 * assume that the Enrollee supports everything we do. 2388 */ 2389 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee " 2390 "does not advertise supported authentication types " 2391 "correctly"); 2392 wps->auth_type = wps->wps->auth_types; 2393 #else /* WPS_WORKAROUNDS */ 2394 return -1; 2395 #endif /* WPS_WORKAROUNDS */ 2396 } 2397 2398 return 0; 2399 } 2400 2401 2402 static int wps_process_encr_type_flags(struct wps_data *wps, const u8 *encr) 2403 { 2404 u16 encr_types; 2405 2406 if (encr == NULL) { 2407 wpa_printf(MSG_DEBUG, "WPS: No Encryption Type flags " 2408 "received"); 2409 return -1; 2410 } 2411 2412 encr_types = WPA_GET_BE16(encr); 2413 2414 wpa_printf(MSG_DEBUG, "WPS: Enrollee Encryption Type flags 0x%x", 2415 encr_types); 2416 wps->encr_type = wps->wps->encr_types & encr_types; 2417 if (wps->encr_type == 0) { 2418 wpa_printf(MSG_DEBUG, "WPS: No match in supported " 2419 "encryption types (own 0x%x Enrollee 0x%x)", 2420 wps->wps->encr_types, encr_types); 2421 #ifdef WPS_WORKAROUNDS 2422 /* 2423 * Some deployed implementations seem to advertise incorrect 2424 * information in this attribute. For example, Linksys WRT350N 2425 * seems to have a byteorder bug that breaks this negotiation. 2426 * In order to interoperate with existing implementations, 2427 * assume that the Enrollee supports everything we do. 2428 */ 2429 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee " 2430 "does not advertise supported encryption types " 2431 "correctly"); 2432 wps->encr_type = wps->wps->encr_types; 2433 #else /* WPS_WORKAROUNDS */ 2434 return -1; 2435 #endif /* WPS_WORKAROUNDS */ 2436 } 2437 2438 return 0; 2439 } 2440 2441 2442 static int wps_process_conn_type_flags(struct wps_data *wps, const u8 *conn) 2443 { 2444 if (conn == NULL) { 2445 wpa_printf(MSG_DEBUG, "WPS: No Connection Type flags " 2446 "received"); 2447 return -1; 2448 } 2449 2450 wpa_printf(MSG_DEBUG, "WPS: Enrollee Connection Type flags 0x%x", 2451 *conn); 2452 2453 return 0; 2454 } 2455 2456 2457 static int wps_process_config_methods(struct wps_data *wps, const u8 *methods) 2458 { 2459 u16 m; 2460 2461 if (methods == NULL) { 2462 wpa_printf(MSG_DEBUG, "WPS: No Config Methods received"); 2463 return -1; 2464 } 2465 2466 m = WPA_GET_BE16(methods); 2467 2468 wpa_printf(MSG_DEBUG, "WPS: Enrollee Config Methods 0x%x" 2469 "%s%s%s%s%s%s%s%s%s", m, 2470 m & WPS_CONFIG_USBA ? " [USBA]" : "", 2471 m & WPS_CONFIG_ETHERNET ? " [Ethernet]" : "", 2472 m & WPS_CONFIG_LABEL ? " [Label]" : "", 2473 m & WPS_CONFIG_DISPLAY ? " [Display]" : "", 2474 m & WPS_CONFIG_EXT_NFC_TOKEN ? " [Ext NFC Token]" : "", 2475 m & WPS_CONFIG_INT_NFC_TOKEN ? " [Int NFC Token]" : "", 2476 m & WPS_CONFIG_NFC_INTERFACE ? " [NFC]" : "", 2477 m & WPS_CONFIG_PUSHBUTTON ? " [PBC]" : "", 2478 m & WPS_CONFIG_KEYPAD ? " [Keypad]" : ""); 2479 2480 if (!(m & WPS_CONFIG_DISPLAY) && !wps->use_psk_key) { 2481 /* 2482 * The Enrollee does not have a display so it is unlikely to be 2483 * able to show the passphrase to a user and as such, could 2484 * benefit from receiving PSK to reduce key derivation time. 2485 */ 2486 wpa_printf(MSG_DEBUG, "WPS: Prefer PSK format key due to " 2487 "Enrollee not supporting display"); 2488 wps->use_psk_key = 1; 2489 } 2490 2491 return 0; 2492 } 2493 2494 2495 static int wps_process_wps_state(struct wps_data *wps, const u8 *state) 2496 { 2497 if (state == NULL) { 2498 wpa_printf(MSG_DEBUG, "WPS: No Wi-Fi Protected Setup State " 2499 "received"); 2500 return -1; 2501 } 2502 2503 wpa_printf(MSG_DEBUG, "WPS: Enrollee Wi-Fi Protected Setup State %d", 2504 *state); 2505 2506 return 0; 2507 } 2508 2509 2510 static int wps_process_assoc_state(struct wps_data *wps, const u8 *assoc) 2511 { 2512 u16 a; 2513 2514 if (assoc == NULL) { 2515 wpa_printf(MSG_DEBUG, "WPS: No Association State received"); 2516 return -1; 2517 } 2518 2519 a = WPA_GET_BE16(assoc); 2520 wpa_printf(MSG_DEBUG, "WPS: Enrollee Association State %d", a); 2521 2522 return 0; 2523 } 2524 2525 2526 static int wps_process_config_error(struct wps_data *wps, const u8 *err) 2527 { 2528 u16 e; 2529 2530 if (err == NULL) { 2531 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error received"); 2532 return -1; 2533 } 2534 2535 e = WPA_GET_BE16(err); 2536 wpa_printf(MSG_DEBUG, "WPS: Enrollee Configuration Error %d", e); 2537 2538 return 0; 2539 } 2540 2541 2542 static int wps_registrar_p2p_dev_addr_match(struct wps_data *wps) 2543 { 2544 #ifdef CONFIG_P2P 2545 struct wps_registrar *reg = wps->wps->registrar; 2546 2547 if (is_zero_ether_addr(reg->p2p_dev_addr)) 2548 return 1; /* no filtering in use */ 2549 2550 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) != 0) { 2551 wpa_printf(MSG_DEBUG, "WPS: No match on P2P Device Address " 2552 "filtering for PBC: expected " MACSTR " was " 2553 MACSTR " - indicate PBC session overlap", 2554 MAC2STR(reg->p2p_dev_addr), 2555 MAC2STR(wps->p2p_dev_addr)); 2556 return 0; 2557 } 2558 #endif /* CONFIG_P2P */ 2559 return 1; 2560 } 2561 2562 2563 static int wps_registrar_skip_overlap(struct wps_data *wps) 2564 { 2565 #ifdef CONFIG_P2P 2566 struct wps_registrar *reg = wps->wps->registrar; 2567 2568 if (is_zero_ether_addr(reg->p2p_dev_addr)) 2569 return 0; /* no specific Enrollee selected */ 2570 2571 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) == 0) { 2572 wpa_printf(MSG_DEBUG, "WPS: Skip PBC overlap due to selected " 2573 "Enrollee match"); 2574 return 1; 2575 } 2576 #endif /* CONFIG_P2P */ 2577 return 0; 2578 } 2579 2580 2581 static enum wps_process_res wps_process_m1(struct wps_data *wps, 2582 struct wps_parse_attr *attr) 2583 { 2584 wpa_printf(MSG_DEBUG, "WPS: Received M1"); 2585 2586 if (wps->state != RECV_M1) { 2587 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2588 "receiving M1", wps->state); 2589 return WPS_FAILURE; 2590 } 2591 2592 if (wps_process_uuid_e(wps, attr->uuid_e) || 2593 wps_process_mac_addr(wps, attr->mac_addr) || 2594 wps_process_enrollee_nonce(wps, attr->enrollee_nonce) || 2595 wps_process_pubkey(wps, attr->public_key, attr->public_key_len) || 2596 wps_process_auth_type_flags(wps, attr->auth_type_flags) || 2597 wps_process_encr_type_flags(wps, attr->encr_type_flags) || 2598 wps_process_conn_type_flags(wps, attr->conn_type_flags) || 2599 wps_process_config_methods(wps, attr->config_methods) || 2600 wps_process_wps_state(wps, attr->wps_state) || 2601 wps_process_device_attrs(&wps->peer_dev, attr) || 2602 wps_process_rf_bands(&wps->peer_dev, attr->rf_bands) || 2603 wps_process_assoc_state(wps, attr->assoc_state) || 2604 wps_process_dev_password_id(wps, attr->dev_password_id) || 2605 wps_process_config_error(wps, attr->config_error) || 2606 wps_process_os_version(&wps->peer_dev, attr->os_version)) 2607 return WPS_FAILURE; 2608 2609 if (wps->dev_pw_id < 0x10 && 2610 wps->dev_pw_id != DEV_PW_DEFAULT && 2611 wps->dev_pw_id != DEV_PW_P2PS_DEFAULT && 2612 wps->dev_pw_id != DEV_PW_USER_SPECIFIED && 2613 wps->dev_pw_id != DEV_PW_MACHINE_SPECIFIED && 2614 wps->dev_pw_id != DEV_PW_REGISTRAR_SPECIFIED && 2615 #ifdef CONFIG_WPS_NFC 2616 wps->dev_pw_id != DEV_PW_NFC_CONNECTION_HANDOVER && 2617 #endif /* CONFIG_WPS_NFC */ 2618 (wps->dev_pw_id != DEV_PW_PUSHBUTTON || 2619 !wps->wps->registrar->pbc)) { 2620 wpa_printf(MSG_DEBUG, "WPS: Unsupported Device Password ID %d", 2621 wps->dev_pw_id); 2622 wps->state = SEND_M2D; 2623 return WPS_CONTINUE; 2624 } 2625 2626 #ifdef CONFIG_WPS_NFC 2627 if (wps->dev_pw_id >= 0x10 || 2628 wps->dev_pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) { 2629 struct wps_nfc_pw_token *token; 2630 const u8 *addr[1]; 2631 u8 hash[WPS_HASH_LEN]; 2632 2633 wpa_printf(MSG_DEBUG, "WPS: Searching for NFC token match for id=%d (ctx %p registrar %p)", 2634 wps->dev_pw_id, wps->wps, wps->wps->registrar); 2635 token = wps_get_nfc_pw_token( 2636 &wps->wps->registrar->nfc_pw_tokens, wps->dev_pw_id); 2637 if (token && token->peer_pk_hash_known) { 2638 size_t len; 2639 2640 wpa_printf(MSG_DEBUG, "WPS: Found matching NFC " 2641 "Password Token"); 2642 dl_list_del(&token->list); 2643 wps->nfc_pw_token = token; 2644 2645 addr[0] = attr->public_key; 2646 len = attr->public_key_len; 2647 sha256_vector(1, addr, &len, hash); 2648 if (os_memcmp_const(hash, 2649 wps->nfc_pw_token->pubkey_hash, 2650 WPS_OOB_PUBKEY_HASH_LEN) != 0) { 2651 wpa_printf(MSG_ERROR, "WPS: Public Key hash " 2652 "mismatch"); 2653 wps->state = SEND_M2D; 2654 wps->config_error = 2655 WPS_CFG_PUBLIC_KEY_HASH_MISMATCH; 2656 return WPS_CONTINUE; 2657 } 2658 } else if (token) { 2659 wpa_printf(MSG_DEBUG, "WPS: Found matching NFC " 2660 "Password Token (no peer PK hash)"); 2661 wps->nfc_pw_token = token; 2662 } else if (wps->dev_pw_id >= 0x10 && 2663 wps->wps->ap_nfc_dev_pw_id == wps->dev_pw_id && 2664 wps->wps->ap_nfc_dev_pw) { 2665 wpa_printf(MSG_DEBUG, "WPS: Found match with own NFC Password Token"); 2666 } 2667 } 2668 #endif /* CONFIG_WPS_NFC */ 2669 2670 if (wps->dev_pw_id == DEV_PW_PUSHBUTTON) { 2671 if ((wps->wps->registrar->force_pbc_overlap || 2672 wps_registrar_pbc_overlap(wps->wps->registrar, 2673 wps->mac_addr_e, wps->uuid_e) || 2674 !wps_registrar_p2p_dev_addr_match(wps)) && 2675 !wps_registrar_skip_overlap(wps)) { 2676 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - deny PBC " 2677 "negotiation"); 2678 wps->state = SEND_M2D; 2679 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2680 wps_pbc_overlap_event(wps->wps); 2681 wps_fail_event(wps->wps, WPS_M1, 2682 WPS_CFG_MULTIPLE_PBC_DETECTED, 2683 WPS_EI_NO_ERROR, wps->mac_addr_e); 2684 wps->wps->registrar->force_pbc_overlap = 1; 2685 return WPS_CONTINUE; 2686 } 2687 wps_registrar_add_pbc_session(wps->wps->registrar, 2688 wps->mac_addr_e, wps->uuid_e); 2689 wps->pbc = 1; 2690 } 2691 2692 #ifdef WPS_WORKAROUNDS 2693 /* 2694 * It looks like Mac OS X 10.6.3 and 10.6.4 do not like Network Key in 2695 * passphrase format. To avoid interop issues, force PSK format to be 2696 * used. 2697 */ 2698 if (!wps->use_psk_key && 2699 wps->peer_dev.manufacturer && 2700 os_strncmp(wps->peer_dev.manufacturer, "Apple ", 6) == 0 && 2701 wps->peer_dev.model_name && 2702 os_strcmp(wps->peer_dev.model_name, "AirPort") == 0) { 2703 wpa_printf(MSG_DEBUG, "WPS: Workaround - Force Network Key in " 2704 "PSK format"); 2705 wps->use_psk_key = 1; 2706 } 2707 #endif /* WPS_WORKAROUNDS */ 2708 2709 wps->state = SEND_M2; 2710 return WPS_CONTINUE; 2711 } 2712 2713 2714 static enum wps_process_res wps_process_m3(struct wps_data *wps, 2715 const struct wpabuf *msg, 2716 struct wps_parse_attr *attr) 2717 { 2718 wpa_printf(MSG_DEBUG, "WPS: Received M3"); 2719 2720 if (wps->state != RECV_M3) { 2721 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2722 "receiving M3", wps->state); 2723 wps->state = SEND_WSC_NACK; 2724 return WPS_CONTINUE; 2725 } 2726 2727 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2728 !wps_registrar_skip_overlap(wps)) { 2729 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2730 "session overlap"); 2731 wps->state = SEND_WSC_NACK; 2732 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2733 return WPS_CONTINUE; 2734 } 2735 2736 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2737 wps_process_authenticator(wps, attr->authenticator, msg) || 2738 wps_process_e_hash1(wps, attr->e_hash1) || 2739 wps_process_e_hash2(wps, attr->e_hash2)) { 2740 wps->state = SEND_WSC_NACK; 2741 return WPS_CONTINUE; 2742 } 2743 2744 wps->state = SEND_M4; 2745 return WPS_CONTINUE; 2746 } 2747 2748 2749 static enum wps_process_res wps_process_m5(struct wps_data *wps, 2750 const struct wpabuf *msg, 2751 struct wps_parse_attr *attr) 2752 { 2753 struct wpabuf *decrypted; 2754 struct wps_parse_attr eattr; 2755 2756 wpa_printf(MSG_DEBUG, "WPS: Received M5"); 2757 2758 if (wps->state != RECV_M5) { 2759 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2760 "receiving M5", wps->state); 2761 wps->state = SEND_WSC_NACK; 2762 return WPS_CONTINUE; 2763 } 2764 2765 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2766 !wps_registrar_skip_overlap(wps)) { 2767 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2768 "session overlap"); 2769 wps->state = SEND_WSC_NACK; 2770 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2771 return WPS_CONTINUE; 2772 } 2773 2774 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2775 wps_process_authenticator(wps, attr->authenticator, msg)) { 2776 wps->state = SEND_WSC_NACK; 2777 return WPS_CONTINUE; 2778 } 2779 2780 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings, 2781 attr->encr_settings_len); 2782 if (decrypted == NULL) { 2783 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted " 2784 "Settings attribute"); 2785 wps->state = SEND_WSC_NACK; 2786 return WPS_CONTINUE; 2787 } 2788 2789 if (wps_validate_m5_encr(decrypted, attr->version2 != NULL) < 0) { 2790 wpabuf_clear_free(decrypted); 2791 wps->state = SEND_WSC_NACK; 2792 return WPS_CONTINUE; 2793 } 2794 2795 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings " 2796 "attribute"); 2797 if (wps_parse_msg(decrypted, &eattr) < 0 || 2798 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) || 2799 wps_process_e_snonce1(wps, eattr.e_snonce1)) { 2800 wpabuf_clear_free(decrypted); 2801 wps->state = SEND_WSC_NACK; 2802 return WPS_CONTINUE; 2803 } 2804 wpabuf_clear_free(decrypted); 2805 2806 wps->state = SEND_M6; 2807 return WPS_CONTINUE; 2808 } 2809 2810 2811 static void wps_sta_cred_cb(struct wps_data *wps) 2812 { 2813 /* 2814 * Update credential to only include a single authentication and 2815 * encryption type in case the AP configuration includes more than one 2816 * option. 2817 */ 2818 if (wps->cred.auth_type & WPS_AUTH_WPA2PSK) 2819 wps->cred.auth_type = WPS_AUTH_WPA2PSK; 2820 else if (wps->cred.auth_type & WPS_AUTH_WPAPSK) 2821 wps->cred.auth_type = WPS_AUTH_WPAPSK; 2822 if (wps->cred.encr_type & WPS_ENCR_AES) 2823 wps->cred.encr_type = WPS_ENCR_AES; 2824 else if (wps->cred.encr_type & WPS_ENCR_TKIP) 2825 wps->cred.encr_type = WPS_ENCR_TKIP; 2826 wpa_printf(MSG_DEBUG, "WPS: Update local configuration based on the " 2827 "AP configuration"); 2828 if (wps->wps->cred_cb) 2829 wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred); 2830 } 2831 2832 2833 static void wps_cred_update(struct wps_credential *dst, 2834 struct wps_credential *src) 2835 { 2836 os_memcpy(dst->ssid, src->ssid, sizeof(dst->ssid)); 2837 dst->ssid_len = src->ssid_len; 2838 dst->auth_type = src->auth_type; 2839 dst->encr_type = src->encr_type; 2840 dst->key_idx = src->key_idx; 2841 os_memcpy(dst->key, src->key, sizeof(dst->key)); 2842 dst->key_len = src->key_len; 2843 } 2844 2845 2846 static int wps_process_ap_settings_r(struct wps_data *wps, 2847 struct wps_parse_attr *attr) 2848 { 2849 struct wpabuf *msg; 2850 2851 if (wps->wps->ap || wps->er) 2852 return 0; 2853 2854 /* AP Settings Attributes in M7 when Enrollee is an AP */ 2855 if (wps_process_ap_settings(attr, &wps->cred) < 0) 2856 return -1; 2857 2858 wpa_printf(MSG_INFO, "WPS: Received old AP configuration from AP"); 2859 2860 if (wps->new_ap_settings) { 2861 wpa_printf(MSG_INFO, "WPS: Update AP configuration based on " 2862 "new settings"); 2863 wps_cred_update(&wps->cred, wps->new_ap_settings); 2864 return 0; 2865 } else { 2866 /* 2867 * Use the AP PIN only to receive the current AP settings, not 2868 * to reconfigure the AP. 2869 */ 2870 2871 /* 2872 * Clear selected registrar here since we do not get to 2873 * WSC_Done in this protocol run. 2874 */ 2875 wps_registrar_pin_completed(wps->wps->registrar); 2876 2877 msg = wps_build_ap_cred(wps); 2878 if (msg == NULL) 2879 return -1; 2880 wps->cred.cred_attr = wpabuf_head(msg); 2881 wps->cred.cred_attr_len = wpabuf_len(msg); 2882 2883 if (wps->ap_settings_cb) { 2884 wps->ap_settings_cb(wps->ap_settings_cb_ctx, 2885 &wps->cred); 2886 wpabuf_free(msg); 2887 return 1; 2888 } 2889 wps_sta_cred_cb(wps); 2890 2891 wps->cred.cred_attr = NULL; 2892 wps->cred.cred_attr_len = 0; 2893 wpabuf_free(msg); 2894 2895 return 1; 2896 } 2897 } 2898 2899 2900 static enum wps_process_res wps_process_m7(struct wps_data *wps, 2901 const struct wpabuf *msg, 2902 struct wps_parse_attr *attr) 2903 { 2904 struct wpabuf *decrypted; 2905 struct wps_parse_attr eattr; 2906 2907 wpa_printf(MSG_DEBUG, "WPS: Received M7"); 2908 2909 if (wps->state != RECV_M7) { 2910 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2911 "receiving M7", wps->state); 2912 wps->state = SEND_WSC_NACK; 2913 return WPS_CONTINUE; 2914 } 2915 2916 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2917 !wps_registrar_skip_overlap(wps)) { 2918 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2919 "session overlap"); 2920 wps->state = SEND_WSC_NACK; 2921 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2922 return WPS_CONTINUE; 2923 } 2924 2925 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2926 wps_process_authenticator(wps, attr->authenticator, msg)) { 2927 wps->state = SEND_WSC_NACK; 2928 return WPS_CONTINUE; 2929 } 2930 2931 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings, 2932 attr->encr_settings_len); 2933 if (decrypted == NULL) { 2934 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypt Encrypted " 2935 "Settings attribute"); 2936 wps->state = SEND_WSC_NACK; 2937 return WPS_CONTINUE; 2938 } 2939 2940 if (wps_validate_m7_encr(decrypted, wps->wps->ap || wps->er, 2941 attr->version2 != NULL) < 0) { 2942 wpabuf_clear_free(decrypted); 2943 wps->state = SEND_WSC_NACK; 2944 return WPS_CONTINUE; 2945 } 2946 2947 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings " 2948 "attribute"); 2949 if (wps_parse_msg(decrypted, &eattr) < 0 || 2950 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) || 2951 wps_process_e_snonce2(wps, eattr.e_snonce2) || 2952 wps_process_ap_settings_r(wps, &eattr)) { 2953 wpabuf_clear_free(decrypted); 2954 wps->state = SEND_WSC_NACK; 2955 return WPS_CONTINUE; 2956 } 2957 2958 wpabuf_clear_free(decrypted); 2959 2960 wps->state = SEND_M8; 2961 return WPS_CONTINUE; 2962 } 2963 2964 2965 static enum wps_process_res wps_process_wsc_msg(struct wps_data *wps, 2966 const struct wpabuf *msg) 2967 { 2968 struct wps_parse_attr attr; 2969 enum wps_process_res ret = WPS_CONTINUE; 2970 2971 wpa_printf(MSG_DEBUG, "WPS: Received WSC_MSG"); 2972 2973 if (wps_parse_msg(msg, &attr) < 0) 2974 return WPS_FAILURE; 2975 2976 if (attr.msg_type == NULL) { 2977 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 2978 wps->state = SEND_WSC_NACK; 2979 return WPS_CONTINUE; 2980 } 2981 2982 if (*attr.msg_type != WPS_M1 && 2983 (attr.registrar_nonce == NULL || 2984 os_memcmp(wps->nonce_r, attr.registrar_nonce, 2985 WPS_NONCE_LEN) != 0)) { 2986 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 2987 return WPS_FAILURE; 2988 } 2989 2990 switch (*attr.msg_type) { 2991 case WPS_M1: 2992 if (wps_validate_m1(msg) < 0) 2993 return WPS_FAILURE; 2994 #ifdef CONFIG_WPS_UPNP 2995 if (wps->wps->wps_upnp && attr.mac_addr) { 2996 /* Remove old pending messages when starting new run */ 2997 wps_free_pending_msgs(wps->wps->upnp_msgs); 2998 wps->wps->upnp_msgs = NULL; 2999 3000 upnp_wps_device_send_wlan_event( 3001 wps->wps->wps_upnp, attr.mac_addr, 3002 UPNP_WPS_WLANEVENT_TYPE_EAP, msg); 3003 } 3004 #endif /* CONFIG_WPS_UPNP */ 3005 ret = wps_process_m1(wps, &attr); 3006 break; 3007 case WPS_M3: 3008 if (wps_validate_m3(msg) < 0) 3009 return WPS_FAILURE; 3010 ret = wps_process_m3(wps, msg, &attr); 3011 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 3012 wps_fail_event(wps->wps, WPS_M3, wps->config_error, 3013 wps->error_indication, wps->mac_addr_e); 3014 break; 3015 case WPS_M5: 3016 if (wps_validate_m5(msg) < 0) 3017 return WPS_FAILURE; 3018 ret = wps_process_m5(wps, msg, &attr); 3019 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 3020 wps_fail_event(wps->wps, WPS_M5, wps->config_error, 3021 wps->error_indication, wps->mac_addr_e); 3022 break; 3023 case WPS_M7: 3024 if (wps_validate_m7(msg) < 0) 3025 return WPS_FAILURE; 3026 ret = wps_process_m7(wps, msg, &attr); 3027 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 3028 wps_fail_event(wps->wps, WPS_M7, wps->config_error, 3029 wps->error_indication, wps->mac_addr_e); 3030 break; 3031 default: 3032 wpa_printf(MSG_DEBUG, "WPS: Unsupported Message Type %d", 3033 *attr.msg_type); 3034 return WPS_FAILURE; 3035 } 3036 3037 if (ret == WPS_CONTINUE) { 3038 /* Save a copy of the last message for Authenticator derivation 3039 */ 3040 wpabuf_free(wps->last_msg); 3041 wps->last_msg = wpabuf_dup(msg); 3042 } 3043 3044 return ret; 3045 } 3046 3047 3048 static enum wps_process_res wps_process_wsc_ack(struct wps_data *wps, 3049 const struct wpabuf *msg) 3050 { 3051 struct wps_parse_attr attr; 3052 3053 wpa_printf(MSG_DEBUG, "WPS: Received WSC_ACK"); 3054 3055 if (wps_parse_msg(msg, &attr) < 0) 3056 return WPS_FAILURE; 3057 3058 if (attr.msg_type == NULL) { 3059 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3060 return WPS_FAILURE; 3061 } 3062 3063 if (*attr.msg_type != WPS_WSC_ACK) { 3064 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 3065 *attr.msg_type); 3066 return WPS_FAILURE; 3067 } 3068 3069 #ifdef CONFIG_WPS_UPNP 3070 if (wps->wps->wps_upnp && wps->ext_reg && wps->state == RECV_M2D_ACK && 3071 upnp_wps_subscribers(wps->wps->wps_upnp)) { 3072 if (wps->wps->upnp_msgs) 3073 return WPS_CONTINUE; 3074 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an " 3075 "external Registrar"); 3076 return WPS_PENDING; 3077 } 3078 #endif /* CONFIG_WPS_UPNP */ 3079 3080 if (attr.registrar_nonce == NULL || 3081 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 3082 { 3083 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3084 return WPS_FAILURE; 3085 } 3086 3087 if (attr.enrollee_nonce == NULL || 3088 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 3089 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 3090 return WPS_FAILURE; 3091 } 3092 3093 if (wps->state == RECV_M2D_ACK) { 3094 #ifdef CONFIG_WPS_UPNP 3095 if (wps->wps->wps_upnp && 3096 upnp_wps_subscribers(wps->wps->wps_upnp)) { 3097 if (wps->wps->upnp_msgs) 3098 return WPS_CONTINUE; 3099 if (wps->ext_reg == 0) 3100 wps->ext_reg = 1; 3101 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an " 3102 "external Registrar"); 3103 return WPS_PENDING; 3104 } 3105 #endif /* CONFIG_WPS_UPNP */ 3106 3107 wpa_printf(MSG_DEBUG, "WPS: No more registrars available - " 3108 "terminate negotiation"); 3109 } 3110 3111 return WPS_FAILURE; 3112 } 3113 3114 3115 static enum wps_process_res wps_process_wsc_nack(struct wps_data *wps, 3116 const struct wpabuf *msg) 3117 { 3118 struct wps_parse_attr attr; 3119 int old_state; 3120 u16 config_error; 3121 3122 wpa_printf(MSG_DEBUG, "WPS: Received WSC_NACK"); 3123 3124 old_state = wps->state; 3125 wps->state = SEND_WSC_NACK; 3126 3127 if (wps_parse_msg(msg, &attr) < 0) 3128 return WPS_FAILURE; 3129 3130 if (attr.msg_type == NULL) { 3131 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3132 return WPS_FAILURE; 3133 } 3134 3135 if (*attr.msg_type != WPS_WSC_NACK) { 3136 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 3137 *attr.msg_type); 3138 return WPS_FAILURE; 3139 } 3140 3141 #ifdef CONFIG_WPS_UPNP 3142 if (wps->wps->wps_upnp && wps->ext_reg) { 3143 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external " 3144 "Registrar terminated by the Enrollee"); 3145 return WPS_FAILURE; 3146 } 3147 #endif /* CONFIG_WPS_UPNP */ 3148 3149 if (attr.registrar_nonce == NULL || 3150 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 3151 { 3152 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3153 return WPS_FAILURE; 3154 } 3155 3156 if (attr.enrollee_nonce == NULL || 3157 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 3158 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 3159 return WPS_FAILURE; 3160 } 3161 3162 if (attr.config_error == NULL) { 3163 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error attribute " 3164 "in WSC_NACK"); 3165 return WPS_FAILURE; 3166 } 3167 3168 config_error = WPA_GET_BE16(attr.config_error); 3169 wpa_printf(MSG_DEBUG, "WPS: Enrollee terminated negotiation with " 3170 "Configuration Error %d", config_error); 3171 3172 switch (old_state) { 3173 case RECV_M3: 3174 wps_fail_event(wps->wps, WPS_M2, config_error, 3175 wps->error_indication, wps->mac_addr_e); 3176 break; 3177 case RECV_M5: 3178 wps_fail_event(wps->wps, WPS_M4, config_error, 3179 wps->error_indication, wps->mac_addr_e); 3180 break; 3181 case RECV_M7: 3182 wps_fail_event(wps->wps, WPS_M6, config_error, 3183 wps->error_indication, wps->mac_addr_e); 3184 break; 3185 case RECV_DONE: 3186 wps_fail_event(wps->wps, WPS_M8, config_error, 3187 wps->error_indication, wps->mac_addr_e); 3188 break; 3189 default: 3190 break; 3191 } 3192 3193 return WPS_FAILURE; 3194 } 3195 3196 3197 static enum wps_process_res wps_process_wsc_done(struct wps_data *wps, 3198 const struct wpabuf *msg) 3199 { 3200 struct wps_parse_attr attr; 3201 3202 wpa_printf(MSG_DEBUG, "WPS: Received WSC_Done"); 3203 3204 if (wps->state != RECV_DONE && 3205 (!wps->wps->wps_upnp || !wps->ext_reg)) { 3206 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 3207 "receiving WSC_Done", wps->state); 3208 return WPS_FAILURE; 3209 } 3210 3211 if (wps_parse_msg(msg, &attr) < 0) 3212 return WPS_FAILURE; 3213 3214 if (attr.msg_type == NULL) { 3215 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3216 return WPS_FAILURE; 3217 } 3218 3219 if (*attr.msg_type != WPS_WSC_DONE) { 3220 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 3221 *attr.msg_type); 3222 return WPS_FAILURE; 3223 } 3224 3225 #ifdef CONFIG_WPS_UPNP 3226 if (wps->wps->wps_upnp && wps->ext_reg) { 3227 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external " 3228 "Registrar completed successfully"); 3229 wps_device_store(wps->wps->registrar, &wps->peer_dev, 3230 wps->uuid_e); 3231 return WPS_DONE; 3232 } 3233 #endif /* CONFIG_WPS_UPNP */ 3234 3235 if (attr.registrar_nonce == NULL || 3236 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 3237 { 3238 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3239 return WPS_FAILURE; 3240 } 3241 3242 if (attr.enrollee_nonce == NULL || 3243 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 3244 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 3245 return WPS_FAILURE; 3246 } 3247 3248 wpa_printf(MSG_DEBUG, "WPS: Negotiation completed successfully"); 3249 wps_device_store(wps->wps->registrar, &wps->peer_dev, 3250 wps->uuid_e); 3251 3252 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->new_psk && 3253 wps->wps->ap && !wps->wps->registrar->disable_auto_conf) { 3254 struct wps_credential cred; 3255 3256 wpa_printf(MSG_DEBUG, "WPS: Moving to Configured state based " 3257 "on first Enrollee connection"); 3258 3259 os_memset(&cred, 0, sizeof(cred)); 3260 os_memcpy(cred.ssid, wps->wps->ssid, wps->wps->ssid_len); 3261 cred.ssid_len = wps->wps->ssid_len; 3262 if (wps->wps->rf_band_cb(wps->wps->cb_ctx) == WPS_RF_60GHZ) { 3263 cred.auth_type = WPS_AUTH_WPA2PSK; 3264 cred.encr_type = WPS_ENCR_AES; 3265 } else { 3266 cred.auth_type = WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK; 3267 cred.encr_type = WPS_ENCR_TKIP | WPS_ENCR_AES; 3268 } 3269 os_memcpy(cred.key, wps->new_psk, wps->new_psk_len); 3270 cred.key_len = wps->new_psk_len; 3271 3272 wps->wps->wps_state = WPS_STATE_CONFIGURED; 3273 wpa_hexdump_ascii_key(MSG_DEBUG, 3274 "WPS: Generated random passphrase", 3275 wps->new_psk, wps->new_psk_len); 3276 if (wps->wps->cred_cb) 3277 wps->wps->cred_cb(wps->wps->cb_ctx, &cred); 3278 3279 os_free(wps->new_psk); 3280 wps->new_psk = NULL; 3281 } 3282 3283 if (!wps->wps->ap && !wps->er) 3284 wps_sta_cred_cb(wps); 3285 3286 if (wps->new_psk) { 3287 if (wps_cb_new_psk(wps->wps->registrar, wps->mac_addr_e, 3288 wps->p2p_dev_addr, wps->new_psk, 3289 wps->new_psk_len)) { 3290 wpa_printf(MSG_DEBUG, "WPS: Failed to configure the " 3291 "new PSK"); 3292 } 3293 os_free(wps->new_psk); 3294 wps->new_psk = NULL; 3295 } 3296 3297 wps_cb_reg_success(wps->wps->registrar, wps->mac_addr_e, wps->uuid_e, 3298 wps->dev_password, wps->dev_password_len); 3299 3300 if (wps->pbc) { 3301 wps_registrar_remove_pbc_session(wps->wps->registrar, 3302 wps->uuid_e, 3303 wps->p2p_dev_addr); 3304 wps_registrar_pbc_completed(wps->wps->registrar); 3305 #ifdef WPS_WORKAROUNDS 3306 os_get_reltime(&wps->wps->registrar->pbc_ignore_start); 3307 #endif /* WPS_WORKAROUNDS */ 3308 os_memcpy(wps->wps->registrar->pbc_ignore_uuid, wps->uuid_e, 3309 WPS_UUID_LEN); 3310 } else { 3311 wps_registrar_pin_completed(wps->wps->registrar); 3312 } 3313 /* TODO: maintain AuthorizedMACs somewhere separately for each ER and 3314 * merge them into APs own list.. */ 3315 3316 wps_success_event(wps->wps, wps->mac_addr_e); 3317 3318 return WPS_DONE; 3319 } 3320 3321 3322 enum wps_process_res wps_registrar_process_msg(struct wps_data *wps, 3323 enum wsc_op_code op_code, 3324 const struct wpabuf *msg) 3325 { 3326 enum wps_process_res ret; 3327 3328 wpa_printf(MSG_DEBUG, "WPS: Processing received message (len=%lu " 3329 "op_code=%d)", 3330 (unsigned long) wpabuf_len(msg), op_code); 3331 3332 #ifdef CONFIG_WPS_UPNP 3333 if (wps->wps->wps_upnp && op_code == WSC_MSG && wps->ext_reg == 1) { 3334 struct wps_parse_attr attr; 3335 if (wps_parse_msg(msg, &attr) == 0 && attr.msg_type && 3336 *attr.msg_type == WPS_M3) 3337 wps->ext_reg = 2; /* past M2/M2D phase */ 3338 } 3339 if (wps->ext_reg > 1) 3340 wps_registrar_free_pending_m2(wps->wps); 3341 if (wps->wps->wps_upnp && wps->ext_reg && 3342 wps->wps->upnp_msgs == NULL && 3343 (op_code == WSC_MSG || op_code == WSC_Done || op_code == WSC_NACK)) 3344 { 3345 struct wps_parse_attr attr; 3346 int type; 3347 if (wps_parse_msg(msg, &attr) < 0 || attr.msg_type == NULL) 3348 type = -1; 3349 else 3350 type = *attr.msg_type; 3351 wpa_printf(MSG_DEBUG, "WPS: Sending received message (type %d)" 3352 " to external Registrar for processing", type); 3353 upnp_wps_device_send_wlan_event(wps->wps->wps_upnp, 3354 wps->mac_addr_e, 3355 UPNP_WPS_WLANEVENT_TYPE_EAP, 3356 msg); 3357 if (op_code == WSC_MSG) 3358 return WPS_PENDING; 3359 } else if (wps->wps->wps_upnp && wps->ext_reg && op_code == WSC_MSG) { 3360 wpa_printf(MSG_DEBUG, "WPS: Skip internal processing - using " 3361 "external Registrar"); 3362 return WPS_CONTINUE; 3363 } 3364 #endif /* CONFIG_WPS_UPNP */ 3365 3366 switch (op_code) { 3367 case WSC_MSG: 3368 return wps_process_wsc_msg(wps, msg); 3369 case WSC_ACK: 3370 if (wps_validate_wsc_ack(msg) < 0) 3371 return WPS_FAILURE; 3372 return wps_process_wsc_ack(wps, msg); 3373 case WSC_NACK: 3374 if (wps_validate_wsc_nack(msg) < 0) 3375 return WPS_FAILURE; 3376 return wps_process_wsc_nack(wps, msg); 3377 case WSC_Done: 3378 if (wps_validate_wsc_done(msg) < 0) 3379 return WPS_FAILURE; 3380 ret = wps_process_wsc_done(wps, msg); 3381 if (ret == WPS_FAILURE) { 3382 wps->state = SEND_WSC_NACK; 3383 wps_fail_event(wps->wps, WPS_WSC_DONE, 3384 wps->config_error, 3385 wps->error_indication, wps->mac_addr_e); 3386 } 3387 return ret; 3388 default: 3389 wpa_printf(MSG_DEBUG, "WPS: Unsupported op_code %d", op_code); 3390 return WPS_FAILURE; 3391 } 3392 } 3393 3394 3395 int wps_registrar_update_ie(struct wps_registrar *reg) 3396 { 3397 return wps_set_ie(reg); 3398 } 3399 3400 3401 static void wps_registrar_set_selected_timeout(void *eloop_ctx, 3402 void *timeout_ctx) 3403 { 3404 struct wps_registrar *reg = eloop_ctx; 3405 3406 wpa_printf(MSG_DEBUG, "WPS: Selected Registrar timeout - " 3407 "unselect internal Registrar"); 3408 reg->selected_registrar = 0; 3409 reg->pbc = 0; 3410 wps_registrar_selected_registrar_changed(reg, 0); 3411 } 3412 3413 3414 #ifdef CONFIG_WPS_UPNP 3415 static void wps_registrar_sel_reg_add(struct wps_registrar *reg, 3416 struct subscription *s) 3417 { 3418 int i, j; 3419 wpa_printf(MSG_DEBUG, "WPS: External Registrar selected (dev_pw_id=%d " 3420 "config_methods=0x%x)", 3421 s->dev_password_id, s->config_methods); 3422 reg->sel_reg_union = 1; 3423 if (reg->sel_reg_dev_password_id_override != DEV_PW_PUSHBUTTON) 3424 reg->sel_reg_dev_password_id_override = s->dev_password_id; 3425 if (reg->sel_reg_config_methods_override == -1) 3426 reg->sel_reg_config_methods_override = 0; 3427 reg->sel_reg_config_methods_override |= s->config_methods; 3428 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) 3429 if (is_zero_ether_addr(reg->authorized_macs_union[i])) 3430 break; 3431 for (j = 0; i < WPS_MAX_AUTHORIZED_MACS && j < WPS_MAX_AUTHORIZED_MACS; 3432 j++) { 3433 if (is_zero_ether_addr(s->authorized_macs[j])) 3434 break; 3435 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC into union: " 3436 MACSTR, MAC2STR(s->authorized_macs[j])); 3437 os_memcpy(reg->authorized_macs_union[i], 3438 s->authorized_macs[j], ETH_ALEN); 3439 i++; 3440 } 3441 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union", 3442 (u8 *) reg->authorized_macs_union, 3443 sizeof(reg->authorized_macs_union)); 3444 } 3445 #endif /* CONFIG_WPS_UPNP */ 3446 3447 3448 static void wps_registrar_sel_reg_union(struct wps_registrar *reg) 3449 { 3450 #ifdef CONFIG_WPS_UPNP 3451 struct subscription *s; 3452 3453 if (reg->wps->wps_upnp == NULL) 3454 return; 3455 3456 dl_list_for_each(s, ®->wps->wps_upnp->subscriptions, 3457 struct subscription, list) { 3458 struct subscr_addr *sa; 3459 sa = dl_list_first(&s->addr_list, struct subscr_addr, list); 3460 if (sa) { 3461 wpa_printf(MSG_DEBUG, "WPS: External Registrar %s:%d", 3462 inet_ntoa(sa->saddr.sin_addr), 3463 ntohs(sa->saddr.sin_port)); 3464 } 3465 if (s->selected_registrar) 3466 wps_registrar_sel_reg_add(reg, s); 3467 else 3468 wpa_printf(MSG_DEBUG, "WPS: External Registrar not " 3469 "selected"); 3470 } 3471 #endif /* CONFIG_WPS_UPNP */ 3472 } 3473 3474 3475 /** 3476 * wps_registrar_selected_registrar_changed - SetSelectedRegistrar change 3477 * @reg: Registrar data from wps_registrar_init() 3478 * 3479 * This function is called when selected registrar state changes, e.g., when an 3480 * AP receives a SetSelectedRegistrar UPnP message. 3481 */ 3482 void wps_registrar_selected_registrar_changed(struct wps_registrar *reg, 3483 u16 dev_pw_id) 3484 { 3485 wpa_printf(MSG_DEBUG, "WPS: Selected registrar information changed"); 3486 3487 reg->sel_reg_union = reg->selected_registrar; 3488 reg->sel_reg_dev_password_id_override = -1; 3489 reg->sel_reg_config_methods_override = -1; 3490 os_memcpy(reg->authorized_macs_union, reg->authorized_macs, 3491 WPS_MAX_AUTHORIZED_MACS * ETH_ALEN); 3492 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union (start with own)", 3493 (u8 *) reg->authorized_macs_union, 3494 sizeof(reg->authorized_macs_union)); 3495 if (reg->selected_registrar) { 3496 u16 methods; 3497 3498 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 3499 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 3500 WPS_CONFIG_PHY_PUSHBUTTON); 3501 if (reg->pbc) { 3502 reg->sel_reg_dev_password_id_override = 3503 DEV_PW_PUSHBUTTON; 3504 wps_set_pushbutton(&methods, reg->wps->config_methods); 3505 } else if (dev_pw_id) 3506 reg->sel_reg_dev_password_id_override = dev_pw_id; 3507 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar selected " 3508 "(pbc=%d)", reg->pbc); 3509 reg->sel_reg_config_methods_override = methods; 3510 } else 3511 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar not selected"); 3512 3513 wps_registrar_sel_reg_union(reg); 3514 3515 wps_set_ie(reg); 3516 wps_cb_set_sel_reg(reg); 3517 } 3518 3519 3520 int wps_registrar_get_info(struct wps_registrar *reg, const u8 *addr, 3521 char *buf, size_t buflen) 3522 { 3523 struct wps_registrar_device *d; 3524 int len = 0, ret; 3525 char uuid[40]; 3526 char devtype[WPS_DEV_TYPE_BUFSIZE]; 3527 3528 d = wps_device_get(reg, addr); 3529 if (d == NULL) 3530 return 0; 3531 if (uuid_bin2str(d->uuid, uuid, sizeof(uuid))) 3532 return 0; 3533 3534 ret = os_snprintf(buf + len, buflen - len, 3535 "wpsUuid=%s\n" 3536 "wpsPrimaryDeviceType=%s\n" 3537 "wpsDeviceName=%s\n" 3538 "wpsManufacturer=%s\n" 3539 "wpsModelName=%s\n" 3540 "wpsModelNumber=%s\n" 3541 "wpsSerialNumber=%s\n", 3542 uuid, 3543 wps_dev_type_bin2str(d->dev.pri_dev_type, devtype, 3544 sizeof(devtype)), 3545 d->dev.device_name ? d->dev.device_name : "", 3546 d->dev.manufacturer ? d->dev.manufacturer : "", 3547 d->dev.model_name ? d->dev.model_name : "", 3548 d->dev.model_number ? d->dev.model_number : "", 3549 d->dev.serial_number ? d->dev.serial_number : ""); 3550 if (os_snprintf_error(buflen - len, ret)) 3551 return len; 3552 len += ret; 3553 3554 return len; 3555 } 3556 3557 3558 int wps_registrar_config_ap(struct wps_registrar *reg, 3559 struct wps_credential *cred) 3560 { 3561 wpa_printf(MSG_DEBUG, "WPS: encr_type=0x%x", cred->encr_type); 3562 if (!(cred->encr_type & (WPS_ENCR_NONE | WPS_ENCR_TKIP | 3563 WPS_ENCR_AES))) { 3564 if (cred->encr_type & WPS_ENCR_WEP) { 3565 wpa_printf(MSG_INFO, "WPS: Reject new AP settings " 3566 "due to WEP configuration"); 3567 return -1; 3568 } 3569 3570 wpa_printf(MSG_INFO, "WPS: Reject new AP settings due to " 3571 "invalid encr_type 0x%x", cred->encr_type); 3572 return -1; 3573 } 3574 3575 if ((cred->encr_type & (WPS_ENCR_TKIP | WPS_ENCR_AES)) == 3576 WPS_ENCR_TKIP) { 3577 wpa_printf(MSG_DEBUG, "WPS: Upgrade encr_type TKIP -> " 3578 "TKIP+AES"); 3579 cred->encr_type |= WPS_ENCR_AES; 3580 } 3581 3582 if ((cred->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) == 3583 WPS_AUTH_WPAPSK) { 3584 wpa_printf(MSG_DEBUG, "WPS: Upgrade auth_type WPAPSK -> " 3585 "WPAPSK+WPA2PSK"); 3586 cred->auth_type |= WPS_AUTH_WPA2PSK; 3587 } 3588 3589 if (reg->wps->cred_cb) 3590 return reg->wps->cred_cb(reg->wps->cb_ctx, cred); 3591 3592 return -1; 3593 } 3594 3595 3596 #ifdef CONFIG_WPS_NFC 3597 3598 int wps_registrar_add_nfc_pw_token(struct wps_registrar *reg, 3599 const u8 *pubkey_hash, u16 pw_id, 3600 const u8 *dev_pw, size_t dev_pw_len, 3601 int pk_hash_provided_oob) 3602 { 3603 struct wps_nfc_pw_token *token; 3604 3605 if (dev_pw_len > WPS_OOB_DEVICE_PASSWORD_LEN) 3606 return -1; 3607 3608 if (pw_id == DEV_PW_NFC_CONNECTION_HANDOVER && 3609 (pubkey_hash == NULL || !pk_hash_provided_oob)) { 3610 wpa_printf(MSG_DEBUG, "WPS: Unexpected NFC Password Token " 3611 "addition - missing public key hash"); 3612 return -1; 3613 } 3614 3615 wps_free_nfc_pw_tokens(®->nfc_pw_tokens, pw_id); 3616 3617 token = os_zalloc(sizeof(*token)); 3618 if (token == NULL) 3619 return -1; 3620 3621 token->peer_pk_hash_known = pubkey_hash != NULL; 3622 if (pubkey_hash) 3623 os_memcpy(token->pubkey_hash, pubkey_hash, 3624 WPS_OOB_PUBKEY_HASH_LEN); 3625 token->pw_id = pw_id; 3626 token->pk_hash_provided_oob = pk_hash_provided_oob; 3627 if (dev_pw) { 3628 wpa_snprintf_hex_uppercase((char *) token->dev_pw, 3629 sizeof(token->dev_pw), 3630 dev_pw, dev_pw_len); 3631 token->dev_pw_len = dev_pw_len * 2; 3632 } 3633 3634 dl_list_add(®->nfc_pw_tokens, &token->list); 3635 3636 reg->selected_registrar = 1; 3637 reg->pbc = 0; 3638 wps_registrar_add_authorized_mac(reg, 3639 (u8 *) "\xff\xff\xff\xff\xff\xff"); 3640 wps_registrar_selected_registrar_changed(reg, pw_id); 3641 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 3642 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, 3643 wps_registrar_set_selected_timeout, 3644 reg, NULL); 3645 3646 wpa_printf(MSG_DEBUG, "WPS: Added NFC Device Password %u to Registrar", 3647 pw_id); 3648 3649 return 0; 3650 } 3651 3652 3653 int wps_registrar_add_nfc_password_token(struct wps_registrar *reg, 3654 const u8 *oob_dev_pw, 3655 size_t oob_dev_pw_len) 3656 { 3657 const u8 *pos, *hash, *dev_pw; 3658 u16 id; 3659 size_t dev_pw_len; 3660 3661 if (oob_dev_pw_len < WPS_OOB_PUBKEY_HASH_LEN + 2 || 3662 oob_dev_pw_len > WPS_OOB_PUBKEY_HASH_LEN + 2 + 3663 WPS_OOB_DEVICE_PASSWORD_LEN) 3664 return -1; 3665 3666 hash = oob_dev_pw; 3667 pos = oob_dev_pw + WPS_OOB_PUBKEY_HASH_LEN; 3668 id = WPA_GET_BE16(pos); 3669 dev_pw = pos + 2; 3670 dev_pw_len = oob_dev_pw + oob_dev_pw_len - dev_pw; 3671 3672 wpa_printf(MSG_DEBUG, "WPS: Add NFC Password Token for Password ID %u", 3673 id); 3674 3675 wpa_hexdump(MSG_DEBUG, "WPS: Public Key Hash", 3676 hash, WPS_OOB_PUBKEY_HASH_LEN); 3677 wpa_hexdump_key(MSG_DEBUG, "WPS: Device Password", dev_pw, dev_pw_len); 3678 3679 return wps_registrar_add_nfc_pw_token(reg, hash, id, dev_pw, 3680 dev_pw_len, 0); 3681 } 3682 3683 3684 void wps_registrar_remove_nfc_pw_token(struct wps_registrar *reg, 3685 struct wps_nfc_pw_token *token) 3686 { 3687 wps_registrar_remove_authorized_mac(reg, 3688 (u8 *) "\xff\xff\xff\xff\xff\xff"); 3689 wps_registrar_selected_registrar_changed(reg, 0); 3690 3691 /* 3692 * Free the NFC password token if it was used only for a single protocol 3693 * run. The static handover case uses the same password token multiple 3694 * times, so do not free that case here. 3695 */ 3696 if (token->peer_pk_hash_known) 3697 os_free(token); 3698 } 3699 3700 #endif /* CONFIG_WPS_NFC */ 3701