1 /* 2 * Wi-Fi Protected Setup - Registrar 3 * Copyright (c) 2008-2013, Jouni Malinen <j (at) w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9 #include "utils/includes.h" 10 11 #include "utils/common.h" 12 #include "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 /** 680 * wps_registrar_deinit - Deinitialize WPS Registrar data 681 * @reg: Registrar data from wps_registrar_init() 682 */ 683 void wps_registrar_deinit(struct wps_registrar *reg) 684 { 685 if (reg == NULL) 686 return; 687 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 688 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 689 wps_free_pins(®->pins); 690 wps_free_nfc_pw_tokens(®->nfc_pw_tokens, 0); 691 wps_free_pbc_sessions(reg->pbc_sessions); 692 wpabuf_free(reg->extra_cred); 693 wps_free_devices(reg->devices); 694 os_free(reg); 695 } 696 697 698 static void wps_registrar_invalidate_unused(struct wps_registrar *reg) 699 { 700 struct wps_uuid_pin *pin; 701 702 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 703 if (pin->wildcard_uuid == 1 && !(pin->flags & PIN_LOCKED)) { 704 wpa_printf(MSG_DEBUG, "WPS: Invalidate previously " 705 "configured wildcard PIN"); 706 wps_registrar_remove_pin(reg, pin); 707 break; 708 } 709 } 710 } 711 712 713 /** 714 * wps_registrar_add_pin - Configure a new PIN for Registrar 715 * @reg: Registrar data from wps_registrar_init() 716 * @addr: Enrollee MAC address or %NULL if not known 717 * @uuid: UUID-E or %NULL for wildcard (any UUID) 718 * @pin: PIN (Device Password) 719 * @pin_len: Length of pin in octets 720 * @timeout: Time (in seconds) when the PIN will be invalidated; 0 = no timeout 721 * Returns: 0 on success, -1 on failure 722 */ 723 int wps_registrar_add_pin(struct wps_registrar *reg, const u8 *addr, 724 const u8 *uuid, const u8 *pin, size_t pin_len, 725 int timeout) 726 { 727 struct wps_uuid_pin *p; 728 729 p = os_zalloc(sizeof(*p)); 730 if (p == NULL) 731 return -1; 732 if (addr) 733 os_memcpy(p->enrollee_addr, addr, ETH_ALEN); 734 if (uuid == NULL) 735 p->wildcard_uuid = 1; 736 else 737 os_memcpy(p->uuid, uuid, WPS_UUID_LEN); 738 p->pin = os_malloc(pin_len); 739 if (p->pin == NULL) { 740 os_free(p); 741 return -1; 742 } 743 os_memcpy(p->pin, pin, pin_len); 744 p->pin_len = pin_len; 745 746 if (timeout) { 747 p->flags |= PIN_EXPIRES; 748 os_get_reltime(&p->expiration); 749 p->expiration.sec += timeout; 750 } 751 752 if (p->wildcard_uuid) 753 wps_registrar_invalidate_unused(reg); 754 755 dl_list_add(®->pins, &p->list); 756 757 wpa_printf(MSG_DEBUG, "WPS: A new PIN configured (timeout=%d)", 758 timeout); 759 wpa_hexdump(MSG_DEBUG, "WPS: UUID", uuid, WPS_UUID_LEN); 760 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: PIN", pin, pin_len); 761 reg->selected_registrar = 1; 762 reg->pbc = 0; 763 if (addr) 764 wps_registrar_add_authorized_mac(reg, addr); 765 else 766 wps_registrar_add_authorized_mac( 767 reg, (u8 *) "\xff\xff\xff\xff\xff\xff"); 768 wps_registrar_selected_registrar_changed(reg, 0); 769 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 770 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, 771 wps_registrar_set_selected_timeout, 772 reg, NULL); 773 774 return 0; 775 } 776 777 778 static void wps_registrar_remove_pin(struct wps_registrar *reg, 779 struct wps_uuid_pin *pin) 780 { 781 u8 *addr; 782 u8 bcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 783 784 if (is_zero_ether_addr(pin->enrollee_addr)) 785 addr = bcast; 786 else 787 addr = pin->enrollee_addr; 788 wps_registrar_remove_authorized_mac(reg, addr); 789 wps_remove_pin(pin); 790 wps_registrar_selected_registrar_changed(reg, 0); 791 } 792 793 794 static void wps_registrar_expire_pins(struct wps_registrar *reg) 795 { 796 struct wps_uuid_pin *pin, *prev; 797 struct os_reltime now; 798 799 os_get_reltime(&now); 800 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 801 { 802 if ((pin->flags & PIN_EXPIRES) && 803 os_reltime_before(&pin->expiration, &now)) { 804 wpa_hexdump(MSG_DEBUG, "WPS: Expired PIN for UUID", 805 pin->uuid, WPS_UUID_LEN); 806 wps_registrar_remove_pin(reg, pin); 807 } 808 } 809 } 810 811 812 /** 813 * wps_registrar_invalidate_wildcard_pin - Invalidate a wildcard PIN 814 * @reg: Registrar data from wps_registrar_init() 815 * @dev_pw: PIN to search for or %NULL to match any 816 * @dev_pw_len: Length of dev_pw in octets 817 * Returns: 0 on success, -1 if not wildcard PIN is enabled 818 */ 819 static int wps_registrar_invalidate_wildcard_pin(struct wps_registrar *reg, 820 const u8 *dev_pw, 821 size_t dev_pw_len) 822 { 823 struct wps_uuid_pin *pin, *prev; 824 825 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 826 { 827 if (dev_pw && pin->pin && 828 (dev_pw_len != pin->pin_len || 829 os_memcmp_const(dev_pw, pin->pin, dev_pw_len) != 0)) 830 continue; /* different PIN */ 831 if (pin->wildcard_uuid) { 832 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID", 833 pin->uuid, WPS_UUID_LEN); 834 wps_registrar_remove_pin(reg, pin); 835 return 0; 836 } 837 } 838 839 return -1; 840 } 841 842 843 /** 844 * wps_registrar_invalidate_pin - Invalidate a PIN for a specific UUID-E 845 * @reg: Registrar data from wps_registrar_init() 846 * @uuid: UUID-E 847 * Returns: 0 on success, -1 on failure (e.g., PIN not found) 848 */ 849 int wps_registrar_invalidate_pin(struct wps_registrar *reg, const u8 *uuid) 850 { 851 struct wps_uuid_pin *pin, *prev; 852 853 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 854 { 855 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 856 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID", 857 pin->uuid, WPS_UUID_LEN); 858 wps_registrar_remove_pin(reg, pin); 859 return 0; 860 } 861 } 862 863 return -1; 864 } 865 866 867 static const u8 * wps_registrar_get_pin(struct wps_registrar *reg, 868 const u8 *uuid, size_t *pin_len) 869 { 870 struct wps_uuid_pin *pin, *found = NULL; 871 872 wps_registrar_expire_pins(reg); 873 874 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 875 if (!pin->wildcard_uuid && 876 os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 877 found = pin; 878 break; 879 } 880 } 881 882 if (!found) { 883 /* Check for wildcard UUIDs since none of the UUID-specific 884 * PINs matched */ 885 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 886 if (pin->wildcard_uuid == 1 || 887 pin->wildcard_uuid == 2) { 888 wpa_printf(MSG_DEBUG, "WPS: Found a wildcard " 889 "PIN. Assigned it for this UUID-E"); 890 pin->wildcard_uuid++; 891 os_memcpy(pin->uuid, uuid, WPS_UUID_LEN); 892 found = pin; 893 break; 894 } 895 } 896 } 897 898 if (!found) 899 return NULL; 900 901 /* 902 * Lock the PIN to avoid attacks based on concurrent re-use of the PIN 903 * that could otherwise avoid PIN invalidations. 904 */ 905 if (found->flags & PIN_LOCKED) { 906 wpa_printf(MSG_DEBUG, "WPS: Selected PIN locked - do not " 907 "allow concurrent re-use"); 908 return NULL; 909 } 910 *pin_len = found->pin_len; 911 found->flags |= PIN_LOCKED; 912 return found->pin; 913 } 914 915 916 /** 917 * wps_registrar_unlock_pin - Unlock a PIN for a specific UUID-E 918 * @reg: Registrar data from wps_registrar_init() 919 * @uuid: UUID-E 920 * Returns: 0 on success, -1 on failure 921 * 922 * PINs are locked to enforce only one concurrent use. This function unlocks a 923 * PIN to allow it to be used again. If the specified PIN was configured using 924 * a wildcard UUID, it will be removed instead of allowing multiple uses. 925 */ 926 int wps_registrar_unlock_pin(struct wps_registrar *reg, const u8 *uuid) 927 { 928 struct wps_uuid_pin *pin; 929 930 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 931 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 932 if (pin->wildcard_uuid == 3) { 933 wpa_printf(MSG_DEBUG, "WPS: Invalidating used " 934 "wildcard PIN"); 935 return wps_registrar_invalidate_pin(reg, uuid); 936 } 937 pin->flags &= ~PIN_LOCKED; 938 return 0; 939 } 940 } 941 942 return -1; 943 } 944 945 946 static void wps_registrar_stop_pbc(struct wps_registrar *reg) 947 { 948 reg->selected_registrar = 0; 949 reg->pbc = 0; 950 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN); 951 wps_registrar_remove_authorized_mac(reg, 952 (u8 *) "\xff\xff\xff\xff\xff\xff"); 953 wps_registrar_selected_registrar_changed(reg, 0); 954 } 955 956 957 static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx) 958 { 959 struct wps_registrar *reg = eloop_ctx; 960 961 wpa_printf(MSG_DEBUG, "WPS: PBC timed out - disable PBC mode"); 962 wps_pbc_timeout_event(reg->wps); 963 wps_registrar_stop_pbc(reg); 964 } 965 966 967 /** 968 * wps_registrar_button_pushed - Notify Registrar that AP button was pushed 969 * @reg: Registrar data from wps_registrar_init() 970 * @p2p_dev_addr: Limit allowed PBC devices to the specified P2P device, %NULL 971 * indicates no such filtering 972 * Returns: 0 on success, -1 on failure, -2 on session overlap 973 * 974 * This function is called on an AP when a push button is pushed to activate 975 * PBC mode. The PBC mode will be stopped after walk time (2 minutes) timeout 976 * or when a PBC registration is completed. If more than one Enrollee in active 977 * PBC mode has been detected during the monitor time (previous 2 minutes), the 978 * PBC mode is not activated and -2 is returned to indicate session overlap. 979 * This is skipped if a specific Enrollee is selected. 980 */ 981 int wps_registrar_button_pushed(struct wps_registrar *reg, 982 const u8 *p2p_dev_addr) 983 { 984 if (p2p_dev_addr == NULL && 985 wps_registrar_pbc_overlap(reg, NULL, NULL)) { 986 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - do not start PBC " 987 "mode"); 988 wps_pbc_overlap_event(reg->wps); 989 return -2; 990 } 991 wpa_printf(MSG_DEBUG, "WPS: Button pushed - PBC mode started"); 992 reg->force_pbc_overlap = 0; 993 reg->selected_registrar = 1; 994 reg->pbc = 1; 995 if (p2p_dev_addr) 996 os_memcpy(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN); 997 else 998 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN); 999 wps_registrar_add_authorized_mac(reg, 1000 (u8 *) "\xff\xff\xff\xff\xff\xff"); 1001 wps_registrar_selected_registrar_changed(reg, 0); 1002 1003 wps_pbc_active_event(reg->wps); 1004 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 1005 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 1006 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wps_registrar_pbc_timeout, 1007 reg, NULL); 1008 return 0; 1009 } 1010 1011 1012 static void wps_registrar_pbc_completed(struct wps_registrar *reg) 1013 { 1014 wpa_printf(MSG_DEBUG, "WPS: PBC completed - stopping PBC mode"); 1015 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 1016 wps_registrar_stop_pbc(reg); 1017 wps_pbc_disable_event(reg->wps); 1018 } 1019 1020 1021 static void wps_registrar_pin_completed(struct wps_registrar *reg) 1022 { 1023 wpa_printf(MSG_DEBUG, "WPS: PIN completed using internal Registrar"); 1024 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 1025 reg->selected_registrar = 0; 1026 wps_registrar_selected_registrar_changed(reg, 0); 1027 } 1028 1029 1030 void wps_registrar_complete(struct wps_registrar *registrar, const u8 *uuid_e, 1031 const u8 *dev_pw, size_t dev_pw_len) 1032 { 1033 if (registrar->pbc) { 1034 wps_registrar_remove_pbc_session(registrar, 1035 uuid_e, NULL); 1036 wps_registrar_pbc_completed(registrar); 1037 #ifdef WPS_WORKAROUNDS 1038 os_get_reltime(®istrar->pbc_ignore_start); 1039 #endif /* WPS_WORKAROUNDS */ 1040 os_memcpy(registrar->pbc_ignore_uuid, uuid_e, WPS_UUID_LEN); 1041 } else { 1042 wps_registrar_pin_completed(registrar); 1043 } 1044 1045 if (dev_pw && 1046 wps_registrar_invalidate_wildcard_pin(registrar, dev_pw, 1047 dev_pw_len) == 0) { 1048 wpa_hexdump_key(MSG_DEBUG, "WPS: Invalidated wildcard PIN", 1049 dev_pw, dev_pw_len); 1050 } 1051 } 1052 1053 1054 int wps_registrar_wps_cancel(struct wps_registrar *reg) 1055 { 1056 if (reg->pbc) { 1057 wpa_printf(MSG_DEBUG, "WPS: PBC is set - cancelling it"); 1058 wps_registrar_pbc_timeout(reg, NULL); 1059 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 1060 return 1; 1061 } else if (reg->selected_registrar) { 1062 /* PIN Method */ 1063 wpa_printf(MSG_DEBUG, "WPS: PIN is set - cancelling it"); 1064 wps_registrar_pin_completed(reg); 1065 wps_registrar_invalidate_wildcard_pin(reg, NULL, 0); 1066 return 1; 1067 } 1068 return 0; 1069 } 1070 1071 1072 /** 1073 * wps_registrar_probe_req_rx - Notify Registrar of Probe Request 1074 * @reg: Registrar data from wps_registrar_init() 1075 * @addr: MAC address of the Probe Request sender 1076 * @wps_data: WPS IE contents 1077 * 1078 * This function is called on an AP when a Probe Request with WPS IE is 1079 * received. This is used to track PBC mode use and to detect possible overlap 1080 * situation with other WPS APs. 1081 */ 1082 void wps_registrar_probe_req_rx(struct wps_registrar *reg, const u8 *addr, 1083 const struct wpabuf *wps_data, 1084 int p2p_wildcard) 1085 { 1086 struct wps_parse_attr attr; 1087 int skip_add = 0; 1088 1089 wpa_hexdump_buf(MSG_MSGDUMP, 1090 "WPS: Probe Request with WPS data received", 1091 wps_data); 1092 1093 if (wps_parse_msg(wps_data, &attr) < 0) 1094 return; 1095 1096 if (attr.config_methods == NULL) { 1097 wpa_printf(MSG_DEBUG, "WPS: No Config Methods attribute in " 1098 "Probe Request"); 1099 return; 1100 } 1101 1102 if (attr.dev_password_id == NULL) { 1103 wpa_printf(MSG_DEBUG, "WPS: No Device Password Id attribute " 1104 "in Probe Request"); 1105 return; 1106 } 1107 1108 if (reg->enrollee_seen_cb && attr.uuid_e && 1109 attr.primary_dev_type && attr.request_type && !p2p_wildcard) { 1110 char *dev_name = NULL; 1111 if (attr.dev_name) { 1112 dev_name = os_zalloc(attr.dev_name_len + 1); 1113 if (dev_name) { 1114 os_memcpy(dev_name, attr.dev_name, 1115 attr.dev_name_len); 1116 } 1117 } 1118 reg->enrollee_seen_cb(reg->cb_ctx, addr, attr.uuid_e, 1119 attr.primary_dev_type, 1120 WPA_GET_BE16(attr.config_methods), 1121 WPA_GET_BE16(attr.dev_password_id), 1122 *attr.request_type, dev_name); 1123 os_free(dev_name); 1124 } 1125 1126 if (WPA_GET_BE16(attr.dev_password_id) != DEV_PW_PUSHBUTTON) 1127 return; /* Not PBC */ 1128 1129 wpa_printf(MSG_DEBUG, "WPS: Probe Request for PBC received from " 1130 MACSTR, MAC2STR(addr)); 1131 if (attr.uuid_e == NULL) { 1132 wpa_printf(MSG_DEBUG, "WPS: Invalid Probe Request WPS IE: No " 1133 "UUID-E included"); 1134 return; 1135 } 1136 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E from Probe Request", attr.uuid_e, 1137 WPS_UUID_LEN); 1138 1139 #ifdef WPS_WORKAROUNDS 1140 if (reg->pbc_ignore_start.sec && 1141 os_memcmp(attr.uuid_e, reg->pbc_ignore_uuid, WPS_UUID_LEN) == 0) { 1142 struct os_reltime now, dur; 1143 os_get_reltime(&now); 1144 os_reltime_sub(&now, ®->pbc_ignore_start, &dur); 1145 if (dur.sec >= 0 && dur.sec < 5) { 1146 wpa_printf(MSG_DEBUG, "WPS: Ignore PBC activation " 1147 "based on Probe Request from the Enrollee " 1148 "that just completed PBC provisioning"); 1149 skip_add = 1; 1150 } else 1151 reg->pbc_ignore_start.sec = 0; 1152 } 1153 #endif /* WPS_WORKAROUNDS */ 1154 1155 if (!skip_add) 1156 wps_registrar_add_pbc_session(reg, addr, attr.uuid_e); 1157 if (wps_registrar_pbc_overlap(reg, addr, attr.uuid_e)) { 1158 wpa_printf(MSG_DEBUG, "WPS: PBC session overlap detected"); 1159 reg->force_pbc_overlap = 1; 1160 wps_pbc_overlap_event(reg->wps); 1161 } 1162 } 1163 1164 1165 int wps_cb_new_psk(struct wps_registrar *reg, const u8 *mac_addr, 1166 const u8 *p2p_dev_addr, const u8 *psk, size_t psk_len) 1167 { 1168 if (reg->new_psk_cb == NULL) 1169 return 0; 1170 1171 return reg->new_psk_cb(reg->cb_ctx, mac_addr, p2p_dev_addr, psk, 1172 psk_len); 1173 } 1174 1175 1176 static void wps_cb_pin_needed(struct wps_registrar *reg, const u8 *uuid_e, 1177 const struct wps_device_data *dev) 1178 { 1179 if (reg->pin_needed_cb == NULL) 1180 return; 1181 1182 reg->pin_needed_cb(reg->cb_ctx, uuid_e, dev); 1183 } 1184 1185 1186 static void wps_cb_reg_success(struct wps_registrar *reg, const u8 *mac_addr, 1187 const u8 *uuid_e, const u8 *dev_pw, 1188 size_t dev_pw_len) 1189 { 1190 if (reg->reg_success_cb == NULL) 1191 return; 1192 1193 reg->reg_success_cb(reg->cb_ctx, mac_addr, uuid_e, dev_pw, dev_pw_len); 1194 } 1195 1196 1197 static int wps_cb_set_ie(struct wps_registrar *reg, struct wpabuf *beacon_ie, 1198 struct wpabuf *probe_resp_ie) 1199 { 1200 return reg->set_ie_cb(reg->cb_ctx, beacon_ie, probe_resp_ie); 1201 } 1202 1203 1204 static void wps_cb_set_sel_reg(struct wps_registrar *reg) 1205 { 1206 u16 methods = 0; 1207 if (reg->set_sel_reg_cb == NULL) 1208 return; 1209 1210 if (reg->selected_registrar) { 1211 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 1212 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 1213 WPS_CONFIG_PHY_PUSHBUTTON); 1214 if (reg->pbc) 1215 wps_set_pushbutton(&methods, reg->wps->config_methods); 1216 } 1217 1218 wpa_printf(MSG_DEBUG, "WPS: wps_cb_set_sel_reg: sel_reg=%d " 1219 "config_methods=0x%x pbc=%d methods=0x%x", 1220 reg->selected_registrar, reg->wps->config_methods, 1221 reg->pbc, methods); 1222 1223 reg->set_sel_reg_cb(reg->cb_ctx, reg->selected_registrar, 1224 reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT, 1225 methods); 1226 } 1227 1228 1229 static int wps_set_ie(struct wps_registrar *reg) 1230 { 1231 struct wpabuf *beacon; 1232 struct wpabuf *probe; 1233 const u8 *auth_macs; 1234 size_t count; 1235 size_t vendor_len = 0; 1236 int i; 1237 1238 if (reg->set_ie_cb == NULL) 1239 return 0; 1240 1241 for (i = 0; i < MAX_WPS_VENDOR_EXTENSIONS; i++) { 1242 if (reg->wps->dev.vendor_ext[i]) { 1243 vendor_len += 2 + 2; 1244 vendor_len += wpabuf_len(reg->wps->dev.vendor_ext[i]); 1245 } 1246 } 1247 1248 beacon = wpabuf_alloc(400 + vendor_len); 1249 if (beacon == NULL) 1250 return -1; 1251 probe = wpabuf_alloc(500 + vendor_len); 1252 if (probe == NULL) { 1253 wpabuf_free(beacon); 1254 return -1; 1255 } 1256 1257 auth_macs = wps_authorized_macs(reg, &count); 1258 1259 wpa_printf(MSG_DEBUG, "WPS: Build Beacon IEs"); 1260 1261 if (wps_build_version(beacon) || 1262 wps_build_wps_state(reg->wps, beacon) || 1263 wps_build_ap_setup_locked(reg->wps, beacon) || 1264 wps_build_selected_registrar(reg, beacon) || 1265 wps_build_sel_reg_dev_password_id(reg, beacon) || 1266 wps_build_sel_reg_config_methods(reg, beacon) || 1267 wps_build_sel_pbc_reg_uuid_e(reg, beacon) || 1268 (reg->dualband && wps_build_rf_bands(®->wps->dev, beacon, 0)) || 1269 wps_build_wfa_ext(beacon, 0, auth_macs, count) || 1270 wps_build_vendor_ext(®->wps->dev, beacon)) { 1271 wpabuf_free(beacon); 1272 wpabuf_free(probe); 1273 return -1; 1274 } 1275 1276 #ifdef CONFIG_P2P 1277 if (wps_build_dev_name(®->wps->dev, beacon) || 1278 wps_build_primary_dev_type(®->wps->dev, beacon)) { 1279 wpabuf_free(beacon); 1280 wpabuf_free(probe); 1281 return -1; 1282 } 1283 #endif /* CONFIG_P2P */ 1284 1285 wpa_printf(MSG_DEBUG, "WPS: Build Probe Response IEs"); 1286 1287 if (wps_build_version(probe) || 1288 wps_build_wps_state(reg->wps, probe) || 1289 wps_build_ap_setup_locked(reg->wps, probe) || 1290 wps_build_selected_registrar(reg, probe) || 1291 wps_build_sel_reg_dev_password_id(reg, probe) || 1292 wps_build_sel_reg_config_methods(reg, probe) || 1293 wps_build_resp_type(probe, reg->wps->ap ? WPS_RESP_AP : 1294 WPS_RESP_REGISTRAR) || 1295 wps_build_uuid_e(probe, reg->wps->uuid) || 1296 wps_build_device_attrs(®->wps->dev, probe) || 1297 wps_build_probe_config_methods(reg, probe) || 1298 (reg->dualband && wps_build_rf_bands(®->wps->dev, probe, 0)) || 1299 wps_build_wfa_ext(probe, 0, auth_macs, count) || 1300 wps_build_vendor_ext(®->wps->dev, probe)) { 1301 wpabuf_free(beacon); 1302 wpabuf_free(probe); 1303 return -1; 1304 } 1305 1306 beacon = wps_ie_encapsulate(beacon); 1307 probe = wps_ie_encapsulate(probe); 1308 1309 if (!beacon || !probe) { 1310 wpabuf_free(beacon); 1311 wpabuf_free(probe); 1312 return -1; 1313 } 1314 1315 if (reg->static_wep_only) { 1316 /* 1317 * Windows XP and Vista clients can get confused about 1318 * EAP-Identity/Request when they probe the network with 1319 * EAPOL-Start. In such a case, they may assume the network is 1320 * using IEEE 802.1X and prompt user for a certificate while 1321 * the correct (non-WPS) behavior would be to ask for the 1322 * static WEP key. As a workaround, use Microsoft Provisioning 1323 * IE to advertise that legacy 802.1X is not supported. 1324 */ 1325 const u8 ms_wps[7] = { 1326 WLAN_EID_VENDOR_SPECIFIC, 5, 1327 /* Microsoft Provisioning IE (00:50:f2:5) */ 1328 0x00, 0x50, 0xf2, 5, 1329 0x00 /* no legacy 802.1X or MS WPS */ 1330 }; 1331 wpa_printf(MSG_DEBUG, "WPS: Add Microsoft Provisioning IE " 1332 "into Beacon/Probe Response frames"); 1333 wpabuf_put_data(beacon, ms_wps, sizeof(ms_wps)); 1334 wpabuf_put_data(probe, ms_wps, sizeof(ms_wps)); 1335 } 1336 1337 return wps_cb_set_ie(reg, beacon, probe); 1338 } 1339 1340 1341 static int wps_get_dev_password(struct wps_data *wps) 1342 { 1343 const u8 *pin; 1344 size_t pin_len = 0; 1345 1346 bin_clear_free(wps->dev_password, wps->dev_password_len); 1347 wps->dev_password = NULL; 1348 1349 if (wps->pbc) { 1350 wpa_printf(MSG_DEBUG, "WPS: Use default PIN for PBC"); 1351 pin = (const u8 *) "00000000"; 1352 pin_len = 8; 1353 #ifdef CONFIG_WPS_NFC 1354 } else if (wps->nfc_pw_token) { 1355 if (wps->nfc_pw_token->pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) 1356 { 1357 wpa_printf(MSG_DEBUG, "WPS: Using NFC connection " 1358 "handover and abbreviated WPS handshake " 1359 "without Device Password"); 1360 return 0; 1361 } 1362 wpa_printf(MSG_DEBUG, "WPS: Use OOB Device Password from NFC " 1363 "Password Token"); 1364 pin = wps->nfc_pw_token->dev_pw; 1365 pin_len = wps->nfc_pw_token->dev_pw_len; 1366 } else if (wps->dev_pw_id >= 0x10 && 1367 wps->wps->ap_nfc_dev_pw_id == wps->dev_pw_id && 1368 wps->wps->ap_nfc_dev_pw) { 1369 wpa_printf(MSG_DEBUG, "WPS: Use OOB Device Password from own NFC Password Token"); 1370 pin = wpabuf_head(wps->wps->ap_nfc_dev_pw); 1371 pin_len = wpabuf_len(wps->wps->ap_nfc_dev_pw); 1372 #endif /* CONFIG_WPS_NFC */ 1373 } else { 1374 pin = wps_registrar_get_pin(wps->wps->registrar, wps->uuid_e, 1375 &pin_len); 1376 if (pin && wps->dev_pw_id >= 0x10) { 1377 wpa_printf(MSG_DEBUG, "WPS: No match for OOB Device " 1378 "Password ID, but PIN found"); 1379 /* 1380 * See whether Enrollee is willing to use PIN instead. 1381 */ 1382 wps->dev_pw_id = DEV_PW_DEFAULT; 1383 } 1384 } 1385 if (pin == NULL) { 1386 wpa_printf(MSG_DEBUG, "WPS: No Device Password available for " 1387 "the Enrollee (context %p registrar %p)", 1388 wps->wps, wps->wps->registrar); 1389 wps_cb_pin_needed(wps->wps->registrar, wps->uuid_e, 1390 &wps->peer_dev); 1391 return -1; 1392 } 1393 1394 wps->dev_password = os_malloc(pin_len); 1395 if (wps->dev_password == NULL) 1396 return -1; 1397 os_memcpy(wps->dev_password, pin, pin_len); 1398 wps->dev_password_len = pin_len; 1399 1400 return 0; 1401 } 1402 1403 1404 static int wps_build_uuid_r(struct wps_data *wps, struct wpabuf *msg) 1405 { 1406 wpa_printf(MSG_DEBUG, "WPS: * UUID-R"); 1407 wpabuf_put_be16(msg, ATTR_UUID_R); 1408 wpabuf_put_be16(msg, WPS_UUID_LEN); 1409 wpabuf_put_data(msg, wps->uuid_r, WPS_UUID_LEN); 1410 return 0; 1411 } 1412 1413 1414 static int wps_build_r_hash(struct wps_data *wps, struct wpabuf *msg) 1415 { 1416 u8 *hash; 1417 const u8 *addr[4]; 1418 size_t len[4]; 1419 1420 if (random_get_bytes(wps->snonce, 2 * WPS_SECRET_NONCE_LEN) < 0) 1421 return -1; 1422 wpa_hexdump(MSG_DEBUG, "WPS: R-S1", wps->snonce, WPS_SECRET_NONCE_LEN); 1423 wpa_hexdump(MSG_DEBUG, "WPS: R-S2", 1424 wps->snonce + WPS_SECRET_NONCE_LEN, WPS_SECRET_NONCE_LEN); 1425 1426 if (wps->dh_pubkey_e == NULL || wps->dh_pubkey_r == NULL) { 1427 wpa_printf(MSG_DEBUG, "WPS: DH public keys not available for " 1428 "R-Hash derivation"); 1429 return -1; 1430 } 1431 1432 wpa_printf(MSG_DEBUG, "WPS: * R-Hash1"); 1433 wpabuf_put_be16(msg, ATTR_R_HASH1); 1434 wpabuf_put_be16(msg, SHA256_MAC_LEN); 1435 hash = wpabuf_put(msg, SHA256_MAC_LEN); 1436 /* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */ 1437 addr[0] = wps->snonce; 1438 len[0] = WPS_SECRET_NONCE_LEN; 1439 addr[1] = wps->psk1; 1440 len[1] = WPS_PSK_LEN; 1441 addr[2] = wpabuf_head(wps->dh_pubkey_e); 1442 len[2] = wpabuf_len(wps->dh_pubkey_e); 1443 addr[3] = wpabuf_head(wps->dh_pubkey_r); 1444 len[3] = wpabuf_len(wps->dh_pubkey_r); 1445 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 1446 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash1", hash, SHA256_MAC_LEN); 1447 1448 wpa_printf(MSG_DEBUG, "WPS: * R-Hash2"); 1449 wpabuf_put_be16(msg, ATTR_R_HASH2); 1450 wpabuf_put_be16(msg, SHA256_MAC_LEN); 1451 hash = wpabuf_put(msg, SHA256_MAC_LEN); 1452 /* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */ 1453 addr[0] = wps->snonce + WPS_SECRET_NONCE_LEN; 1454 addr[1] = wps->psk2; 1455 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 1456 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash2", hash, SHA256_MAC_LEN); 1457 1458 return 0; 1459 } 1460 1461 1462 static int wps_build_r_snonce1(struct wps_data *wps, struct wpabuf *msg) 1463 { 1464 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce1"); 1465 wpabuf_put_be16(msg, ATTR_R_SNONCE1); 1466 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN); 1467 wpabuf_put_data(msg, wps->snonce, WPS_SECRET_NONCE_LEN); 1468 return 0; 1469 } 1470 1471 1472 static int wps_build_r_snonce2(struct wps_data *wps, struct wpabuf *msg) 1473 { 1474 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce2"); 1475 wpabuf_put_be16(msg, ATTR_R_SNONCE2); 1476 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN); 1477 wpabuf_put_data(msg, wps->snonce + WPS_SECRET_NONCE_LEN, 1478 WPS_SECRET_NONCE_LEN); 1479 return 0; 1480 } 1481 1482 1483 static int wps_build_cred_network_idx(struct wpabuf *msg, 1484 const struct wps_credential *cred) 1485 { 1486 wpa_printf(MSG_DEBUG, "WPS: * Network Index (1)"); 1487 wpabuf_put_be16(msg, ATTR_NETWORK_INDEX); 1488 wpabuf_put_be16(msg, 1); 1489 wpabuf_put_u8(msg, 1); 1490 return 0; 1491 } 1492 1493 1494 static int wps_build_cred_ssid(struct wpabuf *msg, 1495 const struct wps_credential *cred) 1496 { 1497 wpa_printf(MSG_DEBUG, "WPS: * SSID"); 1498 wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID for Credential", 1499 cred->ssid, cred->ssid_len); 1500 wpabuf_put_be16(msg, ATTR_SSID); 1501 wpabuf_put_be16(msg, cred->ssid_len); 1502 wpabuf_put_data(msg, cred->ssid, cred->ssid_len); 1503 return 0; 1504 } 1505 1506 1507 static int wps_build_cred_auth_type(struct wpabuf *msg, 1508 const struct wps_credential *cred) 1509 { 1510 wpa_printf(MSG_DEBUG, "WPS: * Authentication Type (0x%x)", 1511 cred->auth_type); 1512 wpabuf_put_be16(msg, ATTR_AUTH_TYPE); 1513 wpabuf_put_be16(msg, 2); 1514 wpabuf_put_be16(msg, cred->auth_type); 1515 return 0; 1516 } 1517 1518 1519 static int wps_build_cred_encr_type(struct wpabuf *msg, 1520 const struct wps_credential *cred) 1521 { 1522 wpa_printf(MSG_DEBUG, "WPS: * Encryption Type (0x%x)", 1523 cred->encr_type); 1524 wpabuf_put_be16(msg, ATTR_ENCR_TYPE); 1525 wpabuf_put_be16(msg, 2); 1526 wpabuf_put_be16(msg, cred->encr_type); 1527 return 0; 1528 } 1529 1530 1531 static int wps_build_cred_network_key(struct wpabuf *msg, 1532 const struct wps_credential *cred) 1533 { 1534 wpa_printf(MSG_DEBUG, "WPS: * Network Key (len=%d)", 1535 (int) cred->key_len); 1536 wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key", 1537 cred->key, cred->key_len); 1538 wpabuf_put_be16(msg, ATTR_NETWORK_KEY); 1539 wpabuf_put_be16(msg, cred->key_len); 1540 wpabuf_put_data(msg, cred->key, cred->key_len); 1541 return 0; 1542 } 1543 1544 1545 static int wps_build_credential(struct wpabuf *msg, 1546 const struct wps_credential *cred) 1547 { 1548 if (wps_build_cred_network_idx(msg, cred) || 1549 wps_build_cred_ssid(msg, cred) || 1550 wps_build_cred_auth_type(msg, cred) || 1551 wps_build_cred_encr_type(msg, cred) || 1552 wps_build_cred_network_key(msg, cred) || 1553 wps_build_mac_addr(msg, cred->mac_addr)) 1554 return -1; 1555 return 0; 1556 } 1557 1558 1559 int wps_build_credential_wrap(struct wpabuf *msg, 1560 const struct wps_credential *cred) 1561 { 1562 struct wpabuf *wbuf; 1563 wbuf = wpabuf_alloc(200); 1564 if (wbuf == NULL) 1565 return -1; 1566 if (wps_build_credential(wbuf, cred)) { 1567 wpabuf_free(wbuf); 1568 return -1; 1569 } 1570 wpabuf_put_be16(msg, ATTR_CRED); 1571 wpabuf_put_be16(msg, wpabuf_len(wbuf)); 1572 wpabuf_put_buf(msg, wbuf); 1573 wpabuf_free(wbuf); 1574 return 0; 1575 } 1576 1577 1578 int wps_build_cred(struct wps_data *wps, struct wpabuf *msg) 1579 { 1580 struct wpabuf *cred; 1581 1582 if (wps->wps->registrar->skip_cred_build) 1583 goto skip_cred_build; 1584 1585 wpa_printf(MSG_DEBUG, "WPS: * Credential"); 1586 if (wps->use_cred) { 1587 os_memcpy(&wps->cred, wps->use_cred, sizeof(wps->cred)); 1588 goto use_provided; 1589 } 1590 os_memset(&wps->cred, 0, sizeof(wps->cred)); 1591 1592 os_memcpy(wps->cred.ssid, wps->wps->ssid, wps->wps->ssid_len); 1593 wps->cred.ssid_len = wps->wps->ssid_len; 1594 1595 /* Select the best authentication and encryption type */ 1596 if (wps->auth_type & WPS_AUTH_WPA2PSK) 1597 wps->auth_type = WPS_AUTH_WPA2PSK; 1598 else if (wps->auth_type & WPS_AUTH_WPAPSK) 1599 wps->auth_type = WPS_AUTH_WPAPSK; 1600 else if (wps->auth_type & WPS_AUTH_OPEN) 1601 wps->auth_type = WPS_AUTH_OPEN; 1602 else { 1603 wpa_printf(MSG_DEBUG, "WPS: Unsupported auth_type 0x%x", 1604 wps->auth_type); 1605 return -1; 1606 } 1607 wps->cred.auth_type = wps->auth_type; 1608 1609 if (wps->auth_type == WPS_AUTH_WPA2PSK || 1610 wps->auth_type == WPS_AUTH_WPAPSK) { 1611 if (wps->encr_type & WPS_ENCR_AES) 1612 wps->encr_type = WPS_ENCR_AES; 1613 else if (wps->encr_type & WPS_ENCR_TKIP) 1614 wps->encr_type = WPS_ENCR_TKIP; 1615 else { 1616 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption " 1617 "type for WPA/WPA2"); 1618 return -1; 1619 } 1620 } else { 1621 if (wps->encr_type & WPS_ENCR_NONE) 1622 wps->encr_type = WPS_ENCR_NONE; 1623 #ifdef CONFIG_TESTING_OPTIONS 1624 else if (wps->encr_type & WPS_ENCR_WEP) 1625 wps->encr_type = WPS_ENCR_WEP; 1626 #endif /* CONFIG_TESTING_OPTIONS */ 1627 else { 1628 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption " 1629 "type for non-WPA/WPA2 mode"); 1630 return -1; 1631 } 1632 } 1633 wps->cred.encr_type = wps->encr_type; 1634 /* 1635 * Set MAC address in the Credential to be the Enrollee's MAC address 1636 */ 1637 os_memcpy(wps->cred.mac_addr, wps->mac_addr_e, ETH_ALEN); 1638 1639 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->wps->ap && 1640 !wps->wps->registrar->disable_auto_conf) { 1641 u8 r[16]; 1642 /* Generate a random passphrase */ 1643 if (random_pool_ready() != 1 || 1644 random_get_bytes(r, sizeof(r)) < 0) { 1645 wpa_printf(MSG_INFO, 1646 "WPS: Could not generate random PSK"); 1647 return -1; 1648 } 1649 os_free(wps->new_psk); 1650 wps->new_psk = base64_encode(r, sizeof(r), &wps->new_psk_len); 1651 if (wps->new_psk == NULL) 1652 return -1; 1653 wps->new_psk_len--; /* remove newline */ 1654 while (wps->new_psk_len && 1655 wps->new_psk[wps->new_psk_len - 1] == '=') 1656 wps->new_psk_len--; 1657 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Generated passphrase", 1658 wps->new_psk, wps->new_psk_len); 1659 os_memcpy(wps->cred.key, wps->new_psk, wps->new_psk_len); 1660 wps->cred.key_len = wps->new_psk_len; 1661 } else if (!wps->wps->registrar->force_per_enrollee_psk && 1662 wps->use_psk_key && wps->wps->psk_set) { 1663 char hex[65]; 1664 wpa_printf(MSG_DEBUG, "WPS: Use PSK format for Network Key"); 1665 wpa_snprintf_hex(hex, sizeof(hex), wps->wps->psk, 32); 1666 os_memcpy(wps->cred.key, hex, 32 * 2); 1667 wps->cred.key_len = 32 * 2; 1668 } else if (!wps->wps->registrar->force_per_enrollee_psk && 1669 wps->wps->network_key) { 1670 os_memcpy(wps->cred.key, wps->wps->network_key, 1671 wps->wps->network_key_len); 1672 wps->cred.key_len = wps->wps->network_key_len; 1673 } else if (wps->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) { 1674 char hex[65]; 1675 /* Generate a random per-device PSK */ 1676 os_free(wps->new_psk); 1677 wps->new_psk_len = 32; 1678 wps->new_psk = os_malloc(wps->new_psk_len); 1679 if (wps->new_psk == NULL) 1680 return -1; 1681 if (random_pool_ready() != 1 || 1682 random_get_bytes(wps->new_psk, wps->new_psk_len) < 0) { 1683 wpa_printf(MSG_INFO, 1684 "WPS: Could not generate random PSK"); 1685 os_free(wps->new_psk); 1686 wps->new_psk = NULL; 1687 return -1; 1688 } 1689 wpa_hexdump_key(MSG_DEBUG, "WPS: Generated per-device PSK", 1690 wps->new_psk, wps->new_psk_len); 1691 wpa_snprintf_hex(hex, sizeof(hex), wps->new_psk, 1692 wps->new_psk_len); 1693 os_memcpy(wps->cred.key, hex, wps->new_psk_len * 2); 1694 wps->cred.key_len = wps->new_psk_len * 2; 1695 } 1696 1697 use_provided: 1698 #ifdef CONFIG_WPS_TESTING 1699 if (wps_testing_dummy_cred) 1700 cred = wpabuf_alloc(200); 1701 else 1702 cred = NULL; 1703 if (cred) { 1704 struct wps_credential dummy; 1705 wpa_printf(MSG_DEBUG, "WPS: Add dummy credential"); 1706 os_memset(&dummy, 0, sizeof(dummy)); 1707 os_memcpy(dummy.ssid, "dummy", 5); 1708 dummy.ssid_len = 5; 1709 dummy.auth_type = WPS_AUTH_WPA2PSK; 1710 dummy.encr_type = WPS_ENCR_AES; 1711 os_memcpy(dummy.key, "dummy psk", 9); 1712 dummy.key_len = 9; 1713 os_memcpy(dummy.mac_addr, wps->mac_addr_e, ETH_ALEN); 1714 wps_build_credential(cred, &dummy); 1715 wpa_hexdump_buf(MSG_DEBUG, "WPS: Dummy Credential", cred); 1716 1717 wpabuf_put_be16(msg, ATTR_CRED); 1718 wpabuf_put_be16(msg, wpabuf_len(cred)); 1719 wpabuf_put_buf(msg, cred); 1720 1721 wpabuf_free(cred); 1722 } 1723 #endif /* CONFIG_WPS_TESTING */ 1724 1725 cred = wpabuf_alloc(200); 1726 if (cred == NULL) 1727 return -1; 1728 1729 if (wps_build_credential(cred, &wps->cred)) { 1730 wpabuf_free(cred); 1731 return -1; 1732 } 1733 1734 wpabuf_put_be16(msg, ATTR_CRED); 1735 wpabuf_put_be16(msg, wpabuf_len(cred)); 1736 wpabuf_put_buf(msg, cred); 1737 wpabuf_free(cred); 1738 1739 skip_cred_build: 1740 if (wps->wps->registrar->extra_cred) { 1741 wpa_printf(MSG_DEBUG, "WPS: * Credential (pre-configured)"); 1742 wpabuf_put_buf(msg, wps->wps->registrar->extra_cred); 1743 } 1744 1745 return 0; 1746 } 1747 1748 1749 static int wps_build_ap_settings(struct wps_data *wps, struct wpabuf *msg) 1750 { 1751 wpa_printf(MSG_DEBUG, "WPS: * AP Settings"); 1752 1753 if (wps_build_credential(msg, &wps->cred)) 1754 return -1; 1755 1756 return 0; 1757 } 1758 1759 1760 static struct wpabuf * wps_build_ap_cred(struct wps_data *wps) 1761 { 1762 struct wpabuf *msg, *plain; 1763 1764 msg = wpabuf_alloc(1000); 1765 if (msg == NULL) 1766 return NULL; 1767 1768 plain = wpabuf_alloc(200); 1769 if (plain == NULL) { 1770 wpabuf_free(msg); 1771 return NULL; 1772 } 1773 1774 if (wps_build_ap_settings(wps, plain)) { 1775 wpabuf_free(plain); 1776 wpabuf_free(msg); 1777 return NULL; 1778 } 1779 1780 wpabuf_put_be16(msg, ATTR_CRED); 1781 wpabuf_put_be16(msg, wpabuf_len(plain)); 1782 wpabuf_put_buf(msg, plain); 1783 wpabuf_free(plain); 1784 1785 return msg; 1786 } 1787 1788 1789 static struct wpabuf * wps_build_m2(struct wps_data *wps) 1790 { 1791 struct wpabuf *msg; 1792 int config_in_m2 = 0; 1793 1794 if (random_get_bytes(wps->nonce_r, WPS_NONCE_LEN) < 0) 1795 return NULL; 1796 wpa_hexdump(MSG_DEBUG, "WPS: Registrar Nonce", 1797 wps->nonce_r, WPS_NONCE_LEN); 1798 wpa_hexdump(MSG_DEBUG, "WPS: UUID-R", wps->uuid_r, WPS_UUID_LEN); 1799 1800 wpa_printf(MSG_DEBUG, "WPS: Building Message M2"); 1801 msg = wpabuf_alloc(1000); 1802 if (msg == NULL) 1803 return NULL; 1804 1805 if (wps_build_version(msg) || 1806 wps_build_msg_type(msg, WPS_M2) || 1807 wps_build_enrollee_nonce(wps, msg) || 1808 wps_build_registrar_nonce(wps, msg) || 1809 wps_build_uuid_r(wps, msg) || 1810 wps_build_public_key(wps, msg) || 1811 wps_derive_keys(wps) || 1812 wps_build_auth_type_flags(wps, msg) || 1813 wps_build_encr_type_flags(wps, msg) || 1814 wps_build_conn_type_flags(wps, msg) || 1815 wps_build_config_methods_r(wps->wps->registrar, msg) || 1816 wps_build_device_attrs(&wps->wps->dev, msg) || 1817 wps_build_rf_bands(&wps->wps->dev, msg, 1818 wps->wps->rf_band_cb(wps->wps->cb_ctx)) || 1819 wps_build_assoc_state(wps, msg) || 1820 wps_build_config_error(msg, WPS_CFG_NO_ERROR) || 1821 wps_build_dev_password_id(msg, wps->dev_pw_id) || 1822 wps_build_os_version(&wps->wps->dev, msg) || 1823 wps_build_wfa_ext(msg, 0, NULL, 0)) { 1824 wpabuf_free(msg); 1825 return NULL; 1826 } 1827 1828 #ifdef CONFIG_WPS_NFC 1829 if (wps->nfc_pw_token && wps->nfc_pw_token->pk_hash_provided_oob && 1830 wps->nfc_pw_token->pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) { 1831 /* 1832 * Use abbreviated handshake since public key hash allowed 1833 * Enrollee to validate our public key similarly to how Enrollee 1834 * public key was validated. There is no need to validate Device 1835 * Password in this case. 1836 */ 1837 struct wpabuf *plain = wpabuf_alloc(500); 1838 if (plain == NULL || 1839 wps_build_cred(wps, plain) || 1840 wps_build_key_wrap_auth(wps, plain) || 1841 wps_build_encr_settings(wps, msg, plain)) { 1842 wpabuf_free(msg); 1843 wpabuf_free(plain); 1844 return NULL; 1845 } 1846 wpabuf_free(plain); 1847 config_in_m2 = 1; 1848 } 1849 #endif /* CONFIG_WPS_NFC */ 1850 1851 if (wps_build_authenticator(wps, msg)) { 1852 wpabuf_free(msg); 1853 return NULL; 1854 } 1855 1856 wps->int_reg = 1; 1857 wps->state = config_in_m2 ? RECV_DONE : RECV_M3; 1858 return msg; 1859 } 1860 1861 1862 static struct wpabuf * wps_build_m2d(struct wps_data *wps) 1863 { 1864 struct wpabuf *msg; 1865 u16 err = wps->config_error; 1866 1867 wpa_printf(MSG_DEBUG, "WPS: Building Message M2D"); 1868 msg = wpabuf_alloc(1000); 1869 if (msg == NULL) 1870 return NULL; 1871 1872 if (wps->wps->ap && wps->wps->ap_setup_locked && 1873 err == WPS_CFG_NO_ERROR) 1874 err = WPS_CFG_SETUP_LOCKED; 1875 1876 if (wps_build_version(msg) || 1877 wps_build_msg_type(msg, WPS_M2D) || 1878 wps_build_enrollee_nonce(wps, msg) || 1879 wps_build_registrar_nonce(wps, msg) || 1880 wps_build_uuid_r(wps, msg) || 1881 wps_build_auth_type_flags(wps, msg) || 1882 wps_build_encr_type_flags(wps, msg) || 1883 wps_build_conn_type_flags(wps, msg) || 1884 wps_build_config_methods_r(wps->wps->registrar, msg) || 1885 wps_build_device_attrs(&wps->wps->dev, msg) || 1886 wps_build_rf_bands(&wps->wps->dev, msg, 1887 wps->wps->rf_band_cb(wps->wps->cb_ctx)) || 1888 wps_build_assoc_state(wps, msg) || 1889 wps_build_config_error(msg, err) || 1890 wps_build_os_version(&wps->wps->dev, msg) || 1891 wps_build_wfa_ext(msg, 0, NULL, 0)) { 1892 wpabuf_free(msg); 1893 return NULL; 1894 } 1895 1896 wps->state = RECV_M2D_ACK; 1897 return msg; 1898 } 1899 1900 1901 static struct wpabuf * wps_build_m4(struct wps_data *wps) 1902 { 1903 struct wpabuf *msg, *plain; 1904 1905 wpa_printf(MSG_DEBUG, "WPS: Building Message M4"); 1906 1907 wps_derive_psk(wps, wps->dev_password, wps->dev_password_len); 1908 1909 plain = wpabuf_alloc(200); 1910 if (plain == NULL) 1911 return NULL; 1912 1913 msg = wpabuf_alloc(1000); 1914 if (msg == NULL) { 1915 wpabuf_free(plain); 1916 return NULL; 1917 } 1918 1919 if (wps_build_version(msg) || 1920 wps_build_msg_type(msg, WPS_M4) || 1921 wps_build_enrollee_nonce(wps, msg) || 1922 wps_build_r_hash(wps, msg) || 1923 wps_build_r_snonce1(wps, plain) || 1924 wps_build_key_wrap_auth(wps, plain) || 1925 wps_build_encr_settings(wps, msg, plain) || 1926 wps_build_wfa_ext(msg, 0, NULL, 0) || 1927 wps_build_authenticator(wps, msg)) { 1928 wpabuf_free(plain); 1929 wpabuf_free(msg); 1930 return NULL; 1931 } 1932 wpabuf_free(plain); 1933 1934 wps->state = RECV_M5; 1935 return msg; 1936 } 1937 1938 1939 static struct wpabuf * wps_build_m6(struct wps_data *wps) 1940 { 1941 struct wpabuf *msg, *plain; 1942 1943 wpa_printf(MSG_DEBUG, "WPS: Building Message M6"); 1944 1945 plain = wpabuf_alloc(200); 1946 if (plain == NULL) 1947 return NULL; 1948 1949 msg = wpabuf_alloc(1000); 1950 if (msg == NULL) { 1951 wpabuf_free(plain); 1952 return NULL; 1953 } 1954 1955 if (wps_build_version(msg) || 1956 wps_build_msg_type(msg, WPS_M6) || 1957 wps_build_enrollee_nonce(wps, msg) || 1958 wps_build_r_snonce2(wps, plain) || 1959 wps_build_key_wrap_auth(wps, plain) || 1960 wps_build_encr_settings(wps, msg, plain) || 1961 wps_build_wfa_ext(msg, 0, NULL, 0) || 1962 wps_build_authenticator(wps, msg)) { 1963 wpabuf_free(plain); 1964 wpabuf_free(msg); 1965 return NULL; 1966 } 1967 wpabuf_free(plain); 1968 1969 wps->wps_pin_revealed = 1; 1970 wps->state = RECV_M7; 1971 return msg; 1972 } 1973 1974 1975 static struct wpabuf * wps_build_m8(struct wps_data *wps) 1976 { 1977 struct wpabuf *msg, *plain; 1978 1979 wpa_printf(MSG_DEBUG, "WPS: Building Message M8"); 1980 1981 plain = wpabuf_alloc(500); 1982 if (plain == NULL) 1983 return NULL; 1984 1985 msg = wpabuf_alloc(1000); 1986 if (msg == NULL) { 1987 wpabuf_free(plain); 1988 return NULL; 1989 } 1990 1991 if (wps_build_version(msg) || 1992 wps_build_msg_type(msg, WPS_M8) || 1993 wps_build_enrollee_nonce(wps, msg) || 1994 ((wps->wps->ap || wps->er) && wps_build_cred(wps, plain)) || 1995 (!wps->wps->ap && !wps->er && wps_build_ap_settings(wps, plain)) || 1996 wps_build_key_wrap_auth(wps, plain) || 1997 wps_build_encr_settings(wps, msg, plain) || 1998 wps_build_wfa_ext(msg, 0, NULL, 0) || 1999 wps_build_authenticator(wps, msg)) { 2000 wpabuf_free(plain); 2001 wpabuf_free(msg); 2002 return NULL; 2003 } 2004 wpabuf_free(plain); 2005 2006 wps->state = RECV_DONE; 2007 return msg; 2008 } 2009 2010 2011 struct wpabuf * wps_registrar_get_msg(struct wps_data *wps, 2012 enum wsc_op_code *op_code) 2013 { 2014 struct wpabuf *msg; 2015 2016 #ifdef CONFIG_WPS_UPNP 2017 if (!wps->int_reg && wps->wps->wps_upnp) { 2018 struct upnp_pending_message *p, *prev = NULL; 2019 if (wps->ext_reg > 1) 2020 wps_registrar_free_pending_m2(wps->wps); 2021 p = wps->wps->upnp_msgs; 2022 /* TODO: check pending message MAC address */ 2023 while (p && p->next) { 2024 prev = p; 2025 p = p->next; 2026 } 2027 if (p) { 2028 wpa_printf(MSG_DEBUG, "WPS: Use pending message from " 2029 "UPnP"); 2030 if (prev) 2031 prev->next = NULL; 2032 else 2033 wps->wps->upnp_msgs = NULL; 2034 msg = p->msg; 2035 switch (p->type) { 2036 case WPS_WSC_ACK: 2037 *op_code = WSC_ACK; 2038 break; 2039 case WPS_WSC_NACK: 2040 *op_code = WSC_NACK; 2041 break; 2042 default: 2043 *op_code = WSC_MSG; 2044 break; 2045 } 2046 os_free(p); 2047 if (wps->ext_reg == 0) 2048 wps->ext_reg = 1; 2049 return msg; 2050 } 2051 } 2052 if (wps->ext_reg) { 2053 wpa_printf(MSG_DEBUG, "WPS: Using external Registrar, but no " 2054 "pending message available"); 2055 return NULL; 2056 } 2057 #endif /* CONFIG_WPS_UPNP */ 2058 2059 switch (wps->state) { 2060 case SEND_M2: 2061 if (wps_get_dev_password(wps) < 0) 2062 msg = wps_build_m2d(wps); 2063 else 2064 msg = wps_build_m2(wps); 2065 *op_code = WSC_MSG; 2066 break; 2067 case SEND_M2D: 2068 msg = wps_build_m2d(wps); 2069 *op_code = WSC_MSG; 2070 break; 2071 case SEND_M4: 2072 msg = wps_build_m4(wps); 2073 *op_code = WSC_MSG; 2074 break; 2075 case SEND_M6: 2076 msg = wps_build_m6(wps); 2077 *op_code = WSC_MSG; 2078 break; 2079 case SEND_M8: 2080 msg = wps_build_m8(wps); 2081 *op_code = WSC_MSG; 2082 break; 2083 case RECV_DONE: 2084 msg = wps_build_wsc_ack(wps); 2085 *op_code = WSC_ACK; 2086 break; 2087 case SEND_WSC_NACK: 2088 msg = wps_build_wsc_nack(wps); 2089 *op_code = WSC_NACK; 2090 break; 2091 default: 2092 wpa_printf(MSG_DEBUG, "WPS: Unsupported state %d for building " 2093 "a message", wps->state); 2094 msg = NULL; 2095 break; 2096 } 2097 2098 if (*op_code == WSC_MSG && msg) { 2099 /* Save a copy of the last message for Authenticator derivation 2100 */ 2101 wpabuf_free(wps->last_msg); 2102 wps->last_msg = wpabuf_dup(msg); 2103 } 2104 2105 return msg; 2106 } 2107 2108 2109 static int wps_process_enrollee_nonce(struct wps_data *wps, const u8 *e_nonce) 2110 { 2111 if (e_nonce == NULL) { 2112 wpa_printf(MSG_DEBUG, "WPS: No Enrollee Nonce received"); 2113 return -1; 2114 } 2115 2116 os_memcpy(wps->nonce_e, e_nonce, WPS_NONCE_LEN); 2117 wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce", 2118 wps->nonce_e, WPS_NONCE_LEN); 2119 2120 return 0; 2121 } 2122 2123 2124 static int wps_process_registrar_nonce(struct wps_data *wps, const u8 *r_nonce) 2125 { 2126 if (r_nonce == NULL) { 2127 wpa_printf(MSG_DEBUG, "WPS: No Registrar Nonce received"); 2128 return -1; 2129 } 2130 2131 if (os_memcmp(wps->nonce_r, r_nonce, WPS_NONCE_LEN) != 0) { 2132 wpa_printf(MSG_DEBUG, "WPS: Invalid Registrar Nonce received"); 2133 return -1; 2134 } 2135 2136 return 0; 2137 } 2138 2139 2140 static int wps_process_uuid_e(struct wps_data *wps, const u8 *uuid_e) 2141 { 2142 if (uuid_e == NULL) { 2143 wpa_printf(MSG_DEBUG, "WPS: No UUID-E received"); 2144 return -1; 2145 } 2146 2147 os_memcpy(wps->uuid_e, uuid_e, WPS_UUID_LEN); 2148 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", wps->uuid_e, WPS_UUID_LEN); 2149 2150 return 0; 2151 } 2152 2153 2154 static int wps_process_dev_password_id(struct wps_data *wps, const u8 *pw_id) 2155 { 2156 if (pw_id == NULL) { 2157 wpa_printf(MSG_DEBUG, "WPS: No Device Password ID received"); 2158 return -1; 2159 } 2160 2161 wps->dev_pw_id = WPA_GET_BE16(pw_id); 2162 wpa_printf(MSG_DEBUG, "WPS: Device Password ID %d", wps->dev_pw_id); 2163 2164 return 0; 2165 } 2166 2167 2168 static int wps_process_e_hash1(struct wps_data *wps, const u8 *e_hash1) 2169 { 2170 if (e_hash1 == NULL) { 2171 wpa_printf(MSG_DEBUG, "WPS: No E-Hash1 received"); 2172 return -1; 2173 } 2174 2175 os_memcpy(wps->peer_hash1, e_hash1, WPS_HASH_LEN); 2176 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash1", wps->peer_hash1, WPS_HASH_LEN); 2177 2178 return 0; 2179 } 2180 2181 2182 static int wps_process_e_hash2(struct wps_data *wps, const u8 *e_hash2) 2183 { 2184 if (e_hash2 == NULL) { 2185 wpa_printf(MSG_DEBUG, "WPS: No E-Hash2 received"); 2186 return -1; 2187 } 2188 2189 os_memcpy(wps->peer_hash2, e_hash2, WPS_HASH_LEN); 2190 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash2", wps->peer_hash2, WPS_HASH_LEN); 2191 2192 return 0; 2193 } 2194 2195 2196 static int wps_process_e_snonce1(struct wps_data *wps, const u8 *e_snonce1) 2197 { 2198 u8 hash[SHA256_MAC_LEN]; 2199 const u8 *addr[4]; 2200 size_t len[4]; 2201 2202 if (e_snonce1 == NULL) { 2203 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce1 received"); 2204 return -1; 2205 } 2206 2207 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce1", e_snonce1, 2208 WPS_SECRET_NONCE_LEN); 2209 2210 /* E-Hash1 = HMAC_AuthKey(E-S1 || PSK1 || PK_E || PK_R) */ 2211 addr[0] = e_snonce1; 2212 len[0] = WPS_SECRET_NONCE_LEN; 2213 addr[1] = wps->psk1; 2214 len[1] = WPS_PSK_LEN; 2215 addr[2] = wpabuf_head(wps->dh_pubkey_e); 2216 len[2] = wpabuf_len(wps->dh_pubkey_e); 2217 addr[3] = wpabuf_head(wps->dh_pubkey_r); 2218 len[3] = wpabuf_len(wps->dh_pubkey_r); 2219 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 2220 2221 if (os_memcmp_const(wps->peer_hash1, hash, WPS_HASH_LEN) != 0) { 2222 wpa_printf(MSG_DEBUG, "WPS: E-Hash1 derived from E-S1 does " 2223 "not match with the pre-committed value"); 2224 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE; 2225 wps_pwd_auth_fail_event(wps->wps, 0, 1, wps->mac_addr_e); 2226 return -1; 2227 } 2228 2229 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the first " 2230 "half of the device password"); 2231 2232 return 0; 2233 } 2234 2235 2236 static int wps_process_e_snonce2(struct wps_data *wps, const u8 *e_snonce2) 2237 { 2238 u8 hash[SHA256_MAC_LEN]; 2239 const u8 *addr[4]; 2240 size_t len[4]; 2241 2242 if (e_snonce2 == NULL) { 2243 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce2 received"); 2244 return -1; 2245 } 2246 2247 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce2", e_snonce2, 2248 WPS_SECRET_NONCE_LEN); 2249 2250 /* E-Hash2 = HMAC_AuthKey(E-S2 || PSK2 || PK_E || PK_R) */ 2251 addr[0] = e_snonce2; 2252 len[0] = WPS_SECRET_NONCE_LEN; 2253 addr[1] = wps->psk2; 2254 len[1] = WPS_PSK_LEN; 2255 addr[2] = wpabuf_head(wps->dh_pubkey_e); 2256 len[2] = wpabuf_len(wps->dh_pubkey_e); 2257 addr[3] = wpabuf_head(wps->dh_pubkey_r); 2258 len[3] = wpabuf_len(wps->dh_pubkey_r); 2259 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 2260 2261 if (os_memcmp_const(wps->peer_hash2, hash, WPS_HASH_LEN) != 0) { 2262 wpa_printf(MSG_DEBUG, "WPS: E-Hash2 derived from E-S2 does " 2263 "not match with the pre-committed value"); 2264 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e); 2265 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE; 2266 wps_pwd_auth_fail_event(wps->wps, 0, 2, wps->mac_addr_e); 2267 return -1; 2268 } 2269 2270 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the second " 2271 "half of the device password"); 2272 wps->wps_pin_revealed = 0; 2273 wps_registrar_unlock_pin(wps->wps->registrar, wps->uuid_e); 2274 2275 /* 2276 * In case wildcard PIN is used and WPS handshake succeeds in the first 2277 * attempt, wps_registrar_unlock_pin() would not free the PIN, so make 2278 * sure the PIN gets invalidated here. 2279 */ 2280 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e); 2281 2282 return 0; 2283 } 2284 2285 2286 static int wps_process_mac_addr(struct wps_data *wps, const u8 *mac_addr) 2287 { 2288 if (mac_addr == NULL) { 2289 wpa_printf(MSG_DEBUG, "WPS: No MAC Address received"); 2290 return -1; 2291 } 2292 2293 wpa_printf(MSG_DEBUG, "WPS: Enrollee MAC Address " MACSTR, 2294 MAC2STR(mac_addr)); 2295 os_memcpy(wps->mac_addr_e, mac_addr, ETH_ALEN); 2296 os_memcpy(wps->peer_dev.mac_addr, mac_addr, ETH_ALEN); 2297 2298 return 0; 2299 } 2300 2301 2302 static int wps_process_pubkey(struct wps_data *wps, const u8 *pk, 2303 size_t pk_len) 2304 { 2305 if (pk == NULL || pk_len == 0) { 2306 wpa_printf(MSG_DEBUG, "WPS: No Public Key received"); 2307 return -1; 2308 } 2309 2310 wpabuf_free(wps->dh_pubkey_e); 2311 wps->dh_pubkey_e = wpabuf_alloc_copy(pk, pk_len); 2312 if (wps->dh_pubkey_e == NULL) 2313 return -1; 2314 2315 return 0; 2316 } 2317 2318 2319 static int wps_process_auth_type_flags(struct wps_data *wps, const u8 *auth) 2320 { 2321 u16 auth_types; 2322 2323 if (auth == NULL) { 2324 wpa_printf(MSG_DEBUG, "WPS: No Authentication Type flags " 2325 "received"); 2326 return -1; 2327 } 2328 2329 auth_types = WPA_GET_BE16(auth); 2330 2331 wpa_printf(MSG_DEBUG, "WPS: Enrollee Authentication Type flags 0x%x", 2332 auth_types); 2333 wps->auth_type = wps->wps->auth_types & auth_types; 2334 if (wps->auth_type == 0) { 2335 wpa_printf(MSG_DEBUG, "WPS: No match in supported " 2336 "authentication types (own 0x%x Enrollee 0x%x)", 2337 wps->wps->auth_types, auth_types); 2338 #ifdef WPS_WORKAROUNDS 2339 /* 2340 * Some deployed implementations seem to advertise incorrect 2341 * information in this attribute. For example, Linksys WRT350N 2342 * seems to have a byteorder bug that breaks this negotiation. 2343 * In order to interoperate with existing implementations, 2344 * assume that the Enrollee supports everything we do. 2345 */ 2346 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee " 2347 "does not advertise supported authentication types " 2348 "correctly"); 2349 wps->auth_type = wps->wps->auth_types; 2350 #else /* WPS_WORKAROUNDS */ 2351 return -1; 2352 #endif /* WPS_WORKAROUNDS */ 2353 } 2354 2355 return 0; 2356 } 2357 2358 2359 static int wps_process_encr_type_flags(struct wps_data *wps, const u8 *encr) 2360 { 2361 u16 encr_types; 2362 2363 if (encr == NULL) { 2364 wpa_printf(MSG_DEBUG, "WPS: No Encryption Type flags " 2365 "received"); 2366 return -1; 2367 } 2368 2369 encr_types = WPA_GET_BE16(encr); 2370 2371 wpa_printf(MSG_DEBUG, "WPS: Enrollee Encryption Type flags 0x%x", 2372 encr_types); 2373 wps->encr_type = wps->wps->encr_types & encr_types; 2374 if (wps->encr_type == 0) { 2375 wpa_printf(MSG_DEBUG, "WPS: No match in supported " 2376 "encryption types (own 0x%x Enrollee 0x%x)", 2377 wps->wps->encr_types, encr_types); 2378 #ifdef WPS_WORKAROUNDS 2379 /* 2380 * Some deployed implementations seem to advertise incorrect 2381 * information in this attribute. For example, Linksys WRT350N 2382 * seems to have a byteorder bug that breaks this negotiation. 2383 * In order to interoperate with existing implementations, 2384 * assume that the Enrollee supports everything we do. 2385 */ 2386 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee " 2387 "does not advertise supported encryption types " 2388 "correctly"); 2389 wps->encr_type = wps->wps->encr_types; 2390 #else /* WPS_WORKAROUNDS */ 2391 return -1; 2392 #endif /* WPS_WORKAROUNDS */ 2393 } 2394 2395 return 0; 2396 } 2397 2398 2399 static int wps_process_conn_type_flags(struct wps_data *wps, const u8 *conn) 2400 { 2401 if (conn == NULL) { 2402 wpa_printf(MSG_DEBUG, "WPS: No Connection Type flags " 2403 "received"); 2404 return -1; 2405 } 2406 2407 wpa_printf(MSG_DEBUG, "WPS: Enrollee Connection Type flags 0x%x", 2408 *conn); 2409 2410 return 0; 2411 } 2412 2413 2414 static int wps_process_config_methods(struct wps_data *wps, const u8 *methods) 2415 { 2416 u16 m; 2417 2418 if (methods == NULL) { 2419 wpa_printf(MSG_DEBUG, "WPS: No Config Methods received"); 2420 return -1; 2421 } 2422 2423 m = WPA_GET_BE16(methods); 2424 2425 wpa_printf(MSG_DEBUG, "WPS: Enrollee Config Methods 0x%x" 2426 "%s%s%s%s%s%s%s%s%s", m, 2427 m & WPS_CONFIG_USBA ? " [USBA]" : "", 2428 m & WPS_CONFIG_ETHERNET ? " [Ethernet]" : "", 2429 m & WPS_CONFIG_LABEL ? " [Label]" : "", 2430 m & WPS_CONFIG_DISPLAY ? " [Display]" : "", 2431 m & WPS_CONFIG_EXT_NFC_TOKEN ? " [Ext NFC Token]" : "", 2432 m & WPS_CONFIG_INT_NFC_TOKEN ? " [Int NFC Token]" : "", 2433 m & WPS_CONFIG_NFC_INTERFACE ? " [NFC]" : "", 2434 m & WPS_CONFIG_PUSHBUTTON ? " [PBC]" : "", 2435 m & WPS_CONFIG_KEYPAD ? " [Keypad]" : ""); 2436 2437 if (!(m & WPS_CONFIG_DISPLAY) && !wps->use_psk_key) { 2438 /* 2439 * The Enrollee does not have a display so it is unlikely to be 2440 * able to show the passphrase to a user and as such, could 2441 * benefit from receiving PSK to reduce key derivation time. 2442 */ 2443 wpa_printf(MSG_DEBUG, "WPS: Prefer PSK format key due to " 2444 "Enrollee not supporting display"); 2445 wps->use_psk_key = 1; 2446 } 2447 2448 return 0; 2449 } 2450 2451 2452 static int wps_process_wps_state(struct wps_data *wps, const u8 *state) 2453 { 2454 if (state == NULL) { 2455 wpa_printf(MSG_DEBUG, "WPS: No Wi-Fi Protected Setup State " 2456 "received"); 2457 return -1; 2458 } 2459 2460 wpa_printf(MSG_DEBUG, "WPS: Enrollee Wi-Fi Protected Setup State %d", 2461 *state); 2462 2463 return 0; 2464 } 2465 2466 2467 static int wps_process_assoc_state(struct wps_data *wps, const u8 *assoc) 2468 { 2469 u16 a; 2470 2471 if (assoc == NULL) { 2472 wpa_printf(MSG_DEBUG, "WPS: No Association State received"); 2473 return -1; 2474 } 2475 2476 a = WPA_GET_BE16(assoc); 2477 wpa_printf(MSG_DEBUG, "WPS: Enrollee Association State %d", a); 2478 2479 return 0; 2480 } 2481 2482 2483 static int wps_process_config_error(struct wps_data *wps, const u8 *err) 2484 { 2485 u16 e; 2486 2487 if (err == NULL) { 2488 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error received"); 2489 return -1; 2490 } 2491 2492 e = WPA_GET_BE16(err); 2493 wpa_printf(MSG_DEBUG, "WPS: Enrollee Configuration Error %d", e); 2494 2495 return 0; 2496 } 2497 2498 2499 static int wps_registrar_p2p_dev_addr_match(struct wps_data *wps) 2500 { 2501 #ifdef CONFIG_P2P 2502 struct wps_registrar *reg = wps->wps->registrar; 2503 2504 if (is_zero_ether_addr(reg->p2p_dev_addr)) 2505 return 1; /* no filtering in use */ 2506 2507 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) != 0) { 2508 wpa_printf(MSG_DEBUG, "WPS: No match on P2P Device Address " 2509 "filtering for PBC: expected " MACSTR " was " 2510 MACSTR " - indicate PBC session overlap", 2511 MAC2STR(reg->p2p_dev_addr), 2512 MAC2STR(wps->p2p_dev_addr)); 2513 return 0; 2514 } 2515 #endif /* CONFIG_P2P */ 2516 return 1; 2517 } 2518 2519 2520 static int wps_registrar_skip_overlap(struct wps_data *wps) 2521 { 2522 #ifdef CONFIG_P2P 2523 struct wps_registrar *reg = wps->wps->registrar; 2524 2525 if (is_zero_ether_addr(reg->p2p_dev_addr)) 2526 return 0; /* no specific Enrollee selected */ 2527 2528 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) == 0) { 2529 wpa_printf(MSG_DEBUG, "WPS: Skip PBC overlap due to selected " 2530 "Enrollee match"); 2531 return 1; 2532 } 2533 #endif /* CONFIG_P2P */ 2534 return 0; 2535 } 2536 2537 2538 static enum wps_process_res wps_process_m1(struct wps_data *wps, 2539 struct wps_parse_attr *attr) 2540 { 2541 wpa_printf(MSG_DEBUG, "WPS: Received M1"); 2542 2543 if (wps->state != RECV_M1) { 2544 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2545 "receiving M1", wps->state); 2546 return WPS_FAILURE; 2547 } 2548 2549 if (wps_process_uuid_e(wps, attr->uuid_e) || 2550 wps_process_mac_addr(wps, attr->mac_addr) || 2551 wps_process_enrollee_nonce(wps, attr->enrollee_nonce) || 2552 wps_process_pubkey(wps, attr->public_key, attr->public_key_len) || 2553 wps_process_auth_type_flags(wps, attr->auth_type_flags) || 2554 wps_process_encr_type_flags(wps, attr->encr_type_flags) || 2555 wps_process_conn_type_flags(wps, attr->conn_type_flags) || 2556 wps_process_config_methods(wps, attr->config_methods) || 2557 wps_process_wps_state(wps, attr->wps_state) || 2558 wps_process_device_attrs(&wps->peer_dev, attr) || 2559 wps_process_rf_bands(&wps->peer_dev, attr->rf_bands) || 2560 wps_process_assoc_state(wps, attr->assoc_state) || 2561 wps_process_dev_password_id(wps, attr->dev_password_id) || 2562 wps_process_config_error(wps, attr->config_error) || 2563 wps_process_os_version(&wps->peer_dev, attr->os_version)) 2564 return WPS_FAILURE; 2565 2566 if (wps->dev_pw_id < 0x10 && 2567 wps->dev_pw_id != DEV_PW_DEFAULT && 2568 wps->dev_pw_id != DEV_PW_USER_SPECIFIED && 2569 wps->dev_pw_id != DEV_PW_MACHINE_SPECIFIED && 2570 wps->dev_pw_id != DEV_PW_REGISTRAR_SPECIFIED && 2571 #ifdef CONFIG_WPS_NFC 2572 wps->dev_pw_id != DEV_PW_NFC_CONNECTION_HANDOVER && 2573 #endif /* CONFIG_WPS_NFC */ 2574 (wps->dev_pw_id != DEV_PW_PUSHBUTTON || 2575 !wps->wps->registrar->pbc)) { 2576 wpa_printf(MSG_DEBUG, "WPS: Unsupported Device Password ID %d", 2577 wps->dev_pw_id); 2578 wps->state = SEND_M2D; 2579 return WPS_CONTINUE; 2580 } 2581 2582 #ifdef CONFIG_WPS_NFC 2583 if (wps->dev_pw_id >= 0x10 || 2584 wps->dev_pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) { 2585 struct wps_nfc_pw_token *token; 2586 const u8 *addr[1]; 2587 u8 hash[WPS_HASH_LEN]; 2588 2589 wpa_printf(MSG_DEBUG, "WPS: Searching for NFC token match for id=%d (ctx %p registrar %p)", 2590 wps->dev_pw_id, wps->wps, wps->wps->registrar); 2591 token = wps_get_nfc_pw_token( 2592 &wps->wps->registrar->nfc_pw_tokens, wps->dev_pw_id); 2593 if (token && token->peer_pk_hash_known) { 2594 wpa_printf(MSG_DEBUG, "WPS: Found matching NFC " 2595 "Password Token"); 2596 dl_list_del(&token->list); 2597 wps->nfc_pw_token = token; 2598 2599 addr[0] = attr->public_key; 2600 sha256_vector(1, addr, &attr->public_key_len, hash); 2601 if (os_memcmp_const(hash, 2602 wps->nfc_pw_token->pubkey_hash, 2603 WPS_OOB_PUBKEY_HASH_LEN) != 0) { 2604 wpa_printf(MSG_ERROR, "WPS: Public Key hash " 2605 "mismatch"); 2606 wps->state = SEND_M2D; 2607 wps->config_error = 2608 WPS_CFG_PUBLIC_KEY_HASH_MISMATCH; 2609 return WPS_CONTINUE; 2610 } 2611 } else if (token) { 2612 wpa_printf(MSG_DEBUG, "WPS: Found matching NFC " 2613 "Password Token (no peer PK hash)"); 2614 wps->nfc_pw_token = token; 2615 } else if (wps->dev_pw_id >= 0x10 && 2616 wps->wps->ap_nfc_dev_pw_id == wps->dev_pw_id && 2617 wps->wps->ap_nfc_dev_pw) { 2618 wpa_printf(MSG_DEBUG, "WPS: Found match with own NFC Password Token"); 2619 } 2620 } 2621 #endif /* CONFIG_WPS_NFC */ 2622 2623 if (wps->dev_pw_id == DEV_PW_PUSHBUTTON) { 2624 if ((wps->wps->registrar->force_pbc_overlap || 2625 wps_registrar_pbc_overlap(wps->wps->registrar, 2626 wps->mac_addr_e, wps->uuid_e) || 2627 !wps_registrar_p2p_dev_addr_match(wps)) && 2628 !wps_registrar_skip_overlap(wps)) { 2629 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - deny PBC " 2630 "negotiation"); 2631 wps->state = SEND_M2D; 2632 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2633 wps_pbc_overlap_event(wps->wps); 2634 wps_fail_event(wps->wps, WPS_M1, 2635 WPS_CFG_MULTIPLE_PBC_DETECTED, 2636 WPS_EI_NO_ERROR, wps->mac_addr_e); 2637 wps->wps->registrar->force_pbc_overlap = 1; 2638 return WPS_CONTINUE; 2639 } 2640 wps_registrar_add_pbc_session(wps->wps->registrar, 2641 wps->mac_addr_e, wps->uuid_e); 2642 wps->pbc = 1; 2643 } 2644 2645 #ifdef WPS_WORKAROUNDS 2646 /* 2647 * It looks like Mac OS X 10.6.3 and 10.6.4 do not like Network Key in 2648 * passphrase format. To avoid interop issues, force PSK format to be 2649 * used. 2650 */ 2651 if (!wps->use_psk_key && 2652 wps->peer_dev.manufacturer && 2653 os_strncmp(wps->peer_dev.manufacturer, "Apple ", 6) == 0 && 2654 wps->peer_dev.model_name && 2655 os_strcmp(wps->peer_dev.model_name, "AirPort") == 0) { 2656 wpa_printf(MSG_DEBUG, "WPS: Workaround - Force Network Key in " 2657 "PSK format"); 2658 wps->use_psk_key = 1; 2659 } 2660 #endif /* WPS_WORKAROUNDS */ 2661 2662 wps->state = SEND_M2; 2663 return WPS_CONTINUE; 2664 } 2665 2666 2667 static enum wps_process_res wps_process_m3(struct wps_data *wps, 2668 const struct wpabuf *msg, 2669 struct wps_parse_attr *attr) 2670 { 2671 wpa_printf(MSG_DEBUG, "WPS: Received M3"); 2672 2673 if (wps->state != RECV_M3) { 2674 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2675 "receiving M3", wps->state); 2676 wps->state = SEND_WSC_NACK; 2677 return WPS_CONTINUE; 2678 } 2679 2680 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2681 !wps_registrar_skip_overlap(wps)) { 2682 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2683 "session overlap"); 2684 wps->state = SEND_WSC_NACK; 2685 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2686 return WPS_CONTINUE; 2687 } 2688 2689 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2690 wps_process_authenticator(wps, attr->authenticator, msg) || 2691 wps_process_e_hash1(wps, attr->e_hash1) || 2692 wps_process_e_hash2(wps, attr->e_hash2)) { 2693 wps->state = SEND_WSC_NACK; 2694 return WPS_CONTINUE; 2695 } 2696 2697 wps->state = SEND_M4; 2698 return WPS_CONTINUE; 2699 } 2700 2701 2702 static enum wps_process_res wps_process_m5(struct wps_data *wps, 2703 const struct wpabuf *msg, 2704 struct wps_parse_attr *attr) 2705 { 2706 struct wpabuf *decrypted; 2707 struct wps_parse_attr eattr; 2708 2709 wpa_printf(MSG_DEBUG, "WPS: Received M5"); 2710 2711 if (wps->state != RECV_M5) { 2712 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2713 "receiving M5", wps->state); 2714 wps->state = SEND_WSC_NACK; 2715 return WPS_CONTINUE; 2716 } 2717 2718 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2719 !wps_registrar_skip_overlap(wps)) { 2720 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2721 "session overlap"); 2722 wps->state = SEND_WSC_NACK; 2723 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2724 return WPS_CONTINUE; 2725 } 2726 2727 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2728 wps_process_authenticator(wps, attr->authenticator, msg)) { 2729 wps->state = SEND_WSC_NACK; 2730 return WPS_CONTINUE; 2731 } 2732 2733 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings, 2734 attr->encr_settings_len); 2735 if (decrypted == NULL) { 2736 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted " 2737 "Settings attribute"); 2738 wps->state = SEND_WSC_NACK; 2739 return WPS_CONTINUE; 2740 } 2741 2742 if (wps_validate_m5_encr(decrypted, attr->version2 != NULL) < 0) { 2743 wpabuf_free(decrypted); 2744 wps->state = SEND_WSC_NACK; 2745 return WPS_CONTINUE; 2746 } 2747 2748 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings " 2749 "attribute"); 2750 if (wps_parse_msg(decrypted, &eattr) < 0 || 2751 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) || 2752 wps_process_e_snonce1(wps, eattr.e_snonce1)) { 2753 wpabuf_free(decrypted); 2754 wps->state = SEND_WSC_NACK; 2755 return WPS_CONTINUE; 2756 } 2757 wpabuf_free(decrypted); 2758 2759 wps->state = SEND_M6; 2760 return WPS_CONTINUE; 2761 } 2762 2763 2764 static void wps_sta_cred_cb(struct wps_data *wps) 2765 { 2766 /* 2767 * Update credential to only include a single authentication and 2768 * encryption type in case the AP configuration includes more than one 2769 * option. 2770 */ 2771 if (wps->cred.auth_type & WPS_AUTH_WPA2PSK) 2772 wps->cred.auth_type = WPS_AUTH_WPA2PSK; 2773 else if (wps->cred.auth_type & WPS_AUTH_WPAPSK) 2774 wps->cred.auth_type = WPS_AUTH_WPAPSK; 2775 if (wps->cred.encr_type & WPS_ENCR_AES) 2776 wps->cred.encr_type = WPS_ENCR_AES; 2777 else if (wps->cred.encr_type & WPS_ENCR_TKIP) 2778 wps->cred.encr_type = WPS_ENCR_TKIP; 2779 wpa_printf(MSG_DEBUG, "WPS: Update local configuration based on the " 2780 "AP configuration"); 2781 if (wps->wps->cred_cb) 2782 wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred); 2783 } 2784 2785 2786 static void wps_cred_update(struct wps_credential *dst, 2787 struct wps_credential *src) 2788 { 2789 os_memcpy(dst->ssid, src->ssid, sizeof(dst->ssid)); 2790 dst->ssid_len = src->ssid_len; 2791 dst->auth_type = src->auth_type; 2792 dst->encr_type = src->encr_type; 2793 dst->key_idx = src->key_idx; 2794 os_memcpy(dst->key, src->key, sizeof(dst->key)); 2795 dst->key_len = src->key_len; 2796 } 2797 2798 2799 static int wps_process_ap_settings_r(struct wps_data *wps, 2800 struct wps_parse_attr *attr) 2801 { 2802 struct wpabuf *msg; 2803 2804 if (wps->wps->ap || wps->er) 2805 return 0; 2806 2807 /* AP Settings Attributes in M7 when Enrollee is an AP */ 2808 if (wps_process_ap_settings(attr, &wps->cred) < 0) 2809 return -1; 2810 2811 wpa_printf(MSG_INFO, "WPS: Received old AP configuration from AP"); 2812 2813 if (wps->new_ap_settings) { 2814 wpa_printf(MSG_INFO, "WPS: Update AP configuration based on " 2815 "new settings"); 2816 wps_cred_update(&wps->cred, wps->new_ap_settings); 2817 return 0; 2818 } else { 2819 /* 2820 * Use the AP PIN only to receive the current AP settings, not 2821 * to reconfigure the AP. 2822 */ 2823 2824 /* 2825 * Clear selected registrar here since we do not get to 2826 * WSC_Done in this protocol run. 2827 */ 2828 wps_registrar_pin_completed(wps->wps->registrar); 2829 2830 msg = wps_build_ap_cred(wps); 2831 if (msg == NULL) 2832 return -1; 2833 wps->cred.cred_attr = wpabuf_head(msg); 2834 wps->cred.cred_attr_len = wpabuf_len(msg); 2835 2836 if (wps->ap_settings_cb) { 2837 wps->ap_settings_cb(wps->ap_settings_cb_ctx, 2838 &wps->cred); 2839 wpabuf_free(msg); 2840 return 1; 2841 } 2842 wps_sta_cred_cb(wps); 2843 2844 wps->cred.cred_attr = NULL; 2845 wps->cred.cred_attr_len = 0; 2846 wpabuf_free(msg); 2847 2848 return 1; 2849 } 2850 } 2851 2852 2853 static enum wps_process_res wps_process_m7(struct wps_data *wps, 2854 const struct wpabuf *msg, 2855 struct wps_parse_attr *attr) 2856 { 2857 struct wpabuf *decrypted; 2858 struct wps_parse_attr eattr; 2859 2860 wpa_printf(MSG_DEBUG, "WPS: Received M7"); 2861 2862 if (wps->state != RECV_M7) { 2863 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2864 "receiving M7", wps->state); 2865 wps->state = SEND_WSC_NACK; 2866 return WPS_CONTINUE; 2867 } 2868 2869 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2870 !wps_registrar_skip_overlap(wps)) { 2871 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2872 "session overlap"); 2873 wps->state = SEND_WSC_NACK; 2874 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2875 return WPS_CONTINUE; 2876 } 2877 2878 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2879 wps_process_authenticator(wps, attr->authenticator, msg)) { 2880 wps->state = SEND_WSC_NACK; 2881 return WPS_CONTINUE; 2882 } 2883 2884 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings, 2885 attr->encr_settings_len); 2886 if (decrypted == NULL) { 2887 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypt Encrypted " 2888 "Settings attribute"); 2889 wps->state = SEND_WSC_NACK; 2890 return WPS_CONTINUE; 2891 } 2892 2893 if (wps_validate_m7_encr(decrypted, wps->wps->ap || wps->er, 2894 attr->version2 != NULL) < 0) { 2895 wpabuf_free(decrypted); 2896 wps->state = SEND_WSC_NACK; 2897 return WPS_CONTINUE; 2898 } 2899 2900 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings " 2901 "attribute"); 2902 if (wps_parse_msg(decrypted, &eattr) < 0 || 2903 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) || 2904 wps_process_e_snonce2(wps, eattr.e_snonce2) || 2905 wps_process_ap_settings_r(wps, &eattr)) { 2906 wpabuf_free(decrypted); 2907 wps->state = SEND_WSC_NACK; 2908 return WPS_CONTINUE; 2909 } 2910 2911 wpabuf_free(decrypted); 2912 2913 wps->state = SEND_M8; 2914 return WPS_CONTINUE; 2915 } 2916 2917 2918 static enum wps_process_res wps_process_wsc_msg(struct wps_data *wps, 2919 const struct wpabuf *msg) 2920 { 2921 struct wps_parse_attr attr; 2922 enum wps_process_res ret = WPS_CONTINUE; 2923 2924 wpa_printf(MSG_DEBUG, "WPS: Received WSC_MSG"); 2925 2926 if (wps_parse_msg(msg, &attr) < 0) 2927 return WPS_FAILURE; 2928 2929 if (attr.msg_type == NULL) { 2930 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 2931 wps->state = SEND_WSC_NACK; 2932 return WPS_CONTINUE; 2933 } 2934 2935 if (*attr.msg_type != WPS_M1 && 2936 (attr.registrar_nonce == NULL || 2937 os_memcmp(wps->nonce_r, attr.registrar_nonce, 2938 WPS_NONCE_LEN) != 0)) { 2939 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 2940 return WPS_FAILURE; 2941 } 2942 2943 switch (*attr.msg_type) { 2944 case WPS_M1: 2945 if (wps_validate_m1(msg) < 0) 2946 return WPS_FAILURE; 2947 #ifdef CONFIG_WPS_UPNP 2948 if (wps->wps->wps_upnp && attr.mac_addr) { 2949 /* Remove old pending messages when starting new run */ 2950 wps_free_pending_msgs(wps->wps->upnp_msgs); 2951 wps->wps->upnp_msgs = NULL; 2952 2953 upnp_wps_device_send_wlan_event( 2954 wps->wps->wps_upnp, attr.mac_addr, 2955 UPNP_WPS_WLANEVENT_TYPE_EAP, msg); 2956 } 2957 #endif /* CONFIG_WPS_UPNP */ 2958 ret = wps_process_m1(wps, &attr); 2959 break; 2960 case WPS_M3: 2961 if (wps_validate_m3(msg) < 0) 2962 return WPS_FAILURE; 2963 ret = wps_process_m3(wps, msg, &attr); 2964 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 2965 wps_fail_event(wps->wps, WPS_M3, wps->config_error, 2966 wps->error_indication, wps->mac_addr_e); 2967 break; 2968 case WPS_M5: 2969 if (wps_validate_m5(msg) < 0) 2970 return WPS_FAILURE; 2971 ret = wps_process_m5(wps, msg, &attr); 2972 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 2973 wps_fail_event(wps->wps, WPS_M5, wps->config_error, 2974 wps->error_indication, wps->mac_addr_e); 2975 break; 2976 case WPS_M7: 2977 if (wps_validate_m7(msg) < 0) 2978 return WPS_FAILURE; 2979 ret = wps_process_m7(wps, msg, &attr); 2980 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 2981 wps_fail_event(wps->wps, WPS_M7, wps->config_error, 2982 wps->error_indication, wps->mac_addr_e); 2983 break; 2984 default: 2985 wpa_printf(MSG_DEBUG, "WPS: Unsupported Message Type %d", 2986 *attr.msg_type); 2987 return WPS_FAILURE; 2988 } 2989 2990 if (ret == WPS_CONTINUE) { 2991 /* Save a copy of the last message for Authenticator derivation 2992 */ 2993 wpabuf_free(wps->last_msg); 2994 wps->last_msg = wpabuf_dup(msg); 2995 } 2996 2997 return ret; 2998 } 2999 3000 3001 static enum wps_process_res wps_process_wsc_ack(struct wps_data *wps, 3002 const struct wpabuf *msg) 3003 { 3004 struct wps_parse_attr attr; 3005 3006 wpa_printf(MSG_DEBUG, "WPS: Received WSC_ACK"); 3007 3008 if (wps_parse_msg(msg, &attr) < 0) 3009 return WPS_FAILURE; 3010 3011 if (attr.msg_type == NULL) { 3012 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3013 return WPS_FAILURE; 3014 } 3015 3016 if (*attr.msg_type != WPS_WSC_ACK) { 3017 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 3018 *attr.msg_type); 3019 return WPS_FAILURE; 3020 } 3021 3022 #ifdef CONFIG_WPS_UPNP 3023 if (wps->wps->wps_upnp && wps->ext_reg && wps->state == RECV_M2D_ACK && 3024 upnp_wps_subscribers(wps->wps->wps_upnp)) { 3025 if (wps->wps->upnp_msgs) 3026 return WPS_CONTINUE; 3027 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an " 3028 "external Registrar"); 3029 return WPS_PENDING; 3030 } 3031 #endif /* CONFIG_WPS_UPNP */ 3032 3033 if (attr.registrar_nonce == NULL || 3034 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 3035 { 3036 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3037 return WPS_FAILURE; 3038 } 3039 3040 if (attr.enrollee_nonce == NULL || 3041 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 3042 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 3043 return WPS_FAILURE; 3044 } 3045 3046 if (wps->state == RECV_M2D_ACK) { 3047 #ifdef CONFIG_WPS_UPNP 3048 if (wps->wps->wps_upnp && 3049 upnp_wps_subscribers(wps->wps->wps_upnp)) { 3050 if (wps->wps->upnp_msgs) 3051 return WPS_CONTINUE; 3052 if (wps->ext_reg == 0) 3053 wps->ext_reg = 1; 3054 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an " 3055 "external Registrar"); 3056 return WPS_PENDING; 3057 } 3058 #endif /* CONFIG_WPS_UPNP */ 3059 3060 wpa_printf(MSG_DEBUG, "WPS: No more registrars available - " 3061 "terminate negotiation"); 3062 } 3063 3064 return WPS_FAILURE; 3065 } 3066 3067 3068 static enum wps_process_res wps_process_wsc_nack(struct wps_data *wps, 3069 const struct wpabuf *msg) 3070 { 3071 struct wps_parse_attr attr; 3072 int old_state; 3073 u16 config_error; 3074 3075 wpa_printf(MSG_DEBUG, "WPS: Received WSC_NACK"); 3076 3077 old_state = wps->state; 3078 wps->state = SEND_WSC_NACK; 3079 3080 if (wps_parse_msg(msg, &attr) < 0) 3081 return WPS_FAILURE; 3082 3083 if (attr.msg_type == NULL) { 3084 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3085 return WPS_FAILURE; 3086 } 3087 3088 if (*attr.msg_type != WPS_WSC_NACK) { 3089 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 3090 *attr.msg_type); 3091 return WPS_FAILURE; 3092 } 3093 3094 #ifdef CONFIG_WPS_UPNP 3095 if (wps->wps->wps_upnp && wps->ext_reg) { 3096 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external " 3097 "Registrar terminated by the Enrollee"); 3098 return WPS_FAILURE; 3099 } 3100 #endif /* CONFIG_WPS_UPNP */ 3101 3102 if (attr.registrar_nonce == NULL || 3103 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 3104 { 3105 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3106 return WPS_FAILURE; 3107 } 3108 3109 if (attr.enrollee_nonce == NULL || 3110 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 3111 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 3112 return WPS_FAILURE; 3113 } 3114 3115 if (attr.config_error == NULL) { 3116 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error attribute " 3117 "in WSC_NACK"); 3118 return WPS_FAILURE; 3119 } 3120 3121 config_error = WPA_GET_BE16(attr.config_error); 3122 wpa_printf(MSG_DEBUG, "WPS: Enrollee terminated negotiation with " 3123 "Configuration Error %d", config_error); 3124 3125 switch (old_state) { 3126 case RECV_M3: 3127 wps_fail_event(wps->wps, WPS_M2, config_error, 3128 wps->error_indication, wps->mac_addr_e); 3129 break; 3130 case RECV_M5: 3131 wps_fail_event(wps->wps, WPS_M4, config_error, 3132 wps->error_indication, wps->mac_addr_e); 3133 break; 3134 case RECV_M7: 3135 wps_fail_event(wps->wps, WPS_M6, config_error, 3136 wps->error_indication, wps->mac_addr_e); 3137 break; 3138 case RECV_DONE: 3139 wps_fail_event(wps->wps, WPS_M8, config_error, 3140 wps->error_indication, wps->mac_addr_e); 3141 break; 3142 default: 3143 break; 3144 } 3145 3146 return WPS_FAILURE; 3147 } 3148 3149 3150 static enum wps_process_res wps_process_wsc_done(struct wps_data *wps, 3151 const struct wpabuf *msg) 3152 { 3153 struct wps_parse_attr attr; 3154 3155 wpa_printf(MSG_DEBUG, "WPS: Received WSC_Done"); 3156 3157 if (wps->state != RECV_DONE && 3158 (!wps->wps->wps_upnp || !wps->ext_reg)) { 3159 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 3160 "receiving WSC_Done", wps->state); 3161 return WPS_FAILURE; 3162 } 3163 3164 if (wps_parse_msg(msg, &attr) < 0) 3165 return WPS_FAILURE; 3166 3167 if (attr.msg_type == NULL) { 3168 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3169 return WPS_FAILURE; 3170 } 3171 3172 if (*attr.msg_type != WPS_WSC_DONE) { 3173 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 3174 *attr.msg_type); 3175 return WPS_FAILURE; 3176 } 3177 3178 #ifdef CONFIG_WPS_UPNP 3179 if (wps->wps->wps_upnp && wps->ext_reg) { 3180 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external " 3181 "Registrar completed successfully"); 3182 wps_device_store(wps->wps->registrar, &wps->peer_dev, 3183 wps->uuid_e); 3184 return WPS_DONE; 3185 } 3186 #endif /* CONFIG_WPS_UPNP */ 3187 3188 if (attr.registrar_nonce == NULL || 3189 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 3190 { 3191 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3192 return WPS_FAILURE; 3193 } 3194 3195 if (attr.enrollee_nonce == NULL || 3196 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 3197 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 3198 return WPS_FAILURE; 3199 } 3200 3201 wpa_printf(MSG_DEBUG, "WPS: Negotiation completed successfully"); 3202 wps_device_store(wps->wps->registrar, &wps->peer_dev, 3203 wps->uuid_e); 3204 3205 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->new_psk && 3206 wps->wps->ap && !wps->wps->registrar->disable_auto_conf) { 3207 struct wps_credential cred; 3208 3209 wpa_printf(MSG_DEBUG, "WPS: Moving to Configured state based " 3210 "on first Enrollee connection"); 3211 3212 os_memset(&cred, 0, sizeof(cred)); 3213 os_memcpy(cred.ssid, wps->wps->ssid, wps->wps->ssid_len); 3214 cred.ssid_len = wps->wps->ssid_len; 3215 cred.auth_type = WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK; 3216 cred.encr_type = WPS_ENCR_TKIP | WPS_ENCR_AES; 3217 os_memcpy(cred.key, wps->new_psk, wps->new_psk_len); 3218 cred.key_len = wps->new_psk_len; 3219 3220 wps->wps->wps_state = WPS_STATE_CONFIGURED; 3221 wpa_hexdump_ascii_key(MSG_DEBUG, 3222 "WPS: Generated random passphrase", 3223 wps->new_psk, wps->new_psk_len); 3224 if (wps->wps->cred_cb) 3225 wps->wps->cred_cb(wps->wps->cb_ctx, &cred); 3226 3227 os_free(wps->new_psk); 3228 wps->new_psk = NULL; 3229 } 3230 3231 if (!wps->wps->ap && !wps->er) 3232 wps_sta_cred_cb(wps); 3233 3234 if (wps->new_psk) { 3235 if (wps_cb_new_psk(wps->wps->registrar, wps->mac_addr_e, 3236 wps->p2p_dev_addr, wps->new_psk, 3237 wps->new_psk_len)) { 3238 wpa_printf(MSG_DEBUG, "WPS: Failed to configure the " 3239 "new PSK"); 3240 } 3241 os_free(wps->new_psk); 3242 wps->new_psk = NULL; 3243 } 3244 3245 wps_cb_reg_success(wps->wps->registrar, wps->mac_addr_e, wps->uuid_e, 3246 wps->dev_password, wps->dev_password_len); 3247 3248 if (wps->pbc) { 3249 wps_registrar_remove_pbc_session(wps->wps->registrar, 3250 wps->uuid_e, 3251 wps->p2p_dev_addr); 3252 wps_registrar_pbc_completed(wps->wps->registrar); 3253 #ifdef WPS_WORKAROUNDS 3254 os_get_reltime(&wps->wps->registrar->pbc_ignore_start); 3255 #endif /* WPS_WORKAROUNDS */ 3256 os_memcpy(wps->wps->registrar->pbc_ignore_uuid, wps->uuid_e, 3257 WPS_UUID_LEN); 3258 } else { 3259 wps_registrar_pin_completed(wps->wps->registrar); 3260 } 3261 /* TODO: maintain AuthorizedMACs somewhere separately for each ER and 3262 * merge them into APs own list.. */ 3263 3264 wps_success_event(wps->wps, wps->mac_addr_e); 3265 3266 return WPS_DONE; 3267 } 3268 3269 3270 enum wps_process_res wps_registrar_process_msg(struct wps_data *wps, 3271 enum wsc_op_code op_code, 3272 const struct wpabuf *msg) 3273 { 3274 enum wps_process_res ret; 3275 3276 wpa_printf(MSG_DEBUG, "WPS: Processing received message (len=%lu " 3277 "op_code=%d)", 3278 (unsigned long) wpabuf_len(msg), op_code); 3279 3280 #ifdef CONFIG_WPS_UPNP 3281 if (wps->wps->wps_upnp && op_code == WSC_MSG && wps->ext_reg == 1) { 3282 struct wps_parse_attr attr; 3283 if (wps_parse_msg(msg, &attr) == 0 && attr.msg_type && 3284 *attr.msg_type == WPS_M3) 3285 wps->ext_reg = 2; /* past M2/M2D phase */ 3286 } 3287 if (wps->ext_reg > 1) 3288 wps_registrar_free_pending_m2(wps->wps); 3289 if (wps->wps->wps_upnp && wps->ext_reg && 3290 wps->wps->upnp_msgs == NULL && 3291 (op_code == WSC_MSG || op_code == WSC_Done || op_code == WSC_NACK)) 3292 { 3293 struct wps_parse_attr attr; 3294 int type; 3295 if (wps_parse_msg(msg, &attr) < 0 || attr.msg_type == NULL) 3296 type = -1; 3297 else 3298 type = *attr.msg_type; 3299 wpa_printf(MSG_DEBUG, "WPS: Sending received message (type %d)" 3300 " to external Registrar for processing", type); 3301 upnp_wps_device_send_wlan_event(wps->wps->wps_upnp, 3302 wps->mac_addr_e, 3303 UPNP_WPS_WLANEVENT_TYPE_EAP, 3304 msg); 3305 if (op_code == WSC_MSG) 3306 return WPS_PENDING; 3307 } else if (wps->wps->wps_upnp && wps->ext_reg && op_code == WSC_MSG) { 3308 wpa_printf(MSG_DEBUG, "WPS: Skip internal processing - using " 3309 "external Registrar"); 3310 return WPS_CONTINUE; 3311 } 3312 #endif /* CONFIG_WPS_UPNP */ 3313 3314 switch (op_code) { 3315 case WSC_MSG: 3316 return wps_process_wsc_msg(wps, msg); 3317 case WSC_ACK: 3318 if (wps_validate_wsc_ack(msg) < 0) 3319 return WPS_FAILURE; 3320 return wps_process_wsc_ack(wps, msg); 3321 case WSC_NACK: 3322 if (wps_validate_wsc_nack(msg) < 0) 3323 return WPS_FAILURE; 3324 return wps_process_wsc_nack(wps, msg); 3325 case WSC_Done: 3326 if (wps_validate_wsc_done(msg) < 0) 3327 return WPS_FAILURE; 3328 ret = wps_process_wsc_done(wps, msg); 3329 if (ret == WPS_FAILURE) { 3330 wps->state = SEND_WSC_NACK; 3331 wps_fail_event(wps->wps, WPS_WSC_DONE, 3332 wps->config_error, 3333 wps->error_indication, wps->mac_addr_e); 3334 } 3335 return ret; 3336 default: 3337 wpa_printf(MSG_DEBUG, "WPS: Unsupported op_code %d", op_code); 3338 return WPS_FAILURE; 3339 } 3340 } 3341 3342 3343 int wps_registrar_update_ie(struct wps_registrar *reg) 3344 { 3345 return wps_set_ie(reg); 3346 } 3347 3348 3349 static void wps_registrar_set_selected_timeout(void *eloop_ctx, 3350 void *timeout_ctx) 3351 { 3352 struct wps_registrar *reg = eloop_ctx; 3353 3354 wpa_printf(MSG_DEBUG, "WPS: Selected Registrar timeout - " 3355 "unselect internal Registrar"); 3356 reg->selected_registrar = 0; 3357 reg->pbc = 0; 3358 wps_registrar_selected_registrar_changed(reg, 0); 3359 } 3360 3361 3362 #ifdef CONFIG_WPS_UPNP 3363 static void wps_registrar_sel_reg_add(struct wps_registrar *reg, 3364 struct subscription *s) 3365 { 3366 int i, j; 3367 wpa_printf(MSG_DEBUG, "WPS: External Registrar selected (dev_pw_id=%d " 3368 "config_methods=0x%x)", 3369 s->dev_password_id, s->config_methods); 3370 reg->sel_reg_union = 1; 3371 if (reg->sel_reg_dev_password_id_override != DEV_PW_PUSHBUTTON) 3372 reg->sel_reg_dev_password_id_override = s->dev_password_id; 3373 if (reg->sel_reg_config_methods_override == -1) 3374 reg->sel_reg_config_methods_override = 0; 3375 reg->sel_reg_config_methods_override |= s->config_methods; 3376 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) 3377 if (is_zero_ether_addr(reg->authorized_macs_union[i])) 3378 break; 3379 for (j = 0; i < WPS_MAX_AUTHORIZED_MACS && j < WPS_MAX_AUTHORIZED_MACS; 3380 j++) { 3381 if (is_zero_ether_addr(s->authorized_macs[j])) 3382 break; 3383 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC into union: " 3384 MACSTR, MAC2STR(s->authorized_macs[j])); 3385 os_memcpy(reg->authorized_macs_union[i], 3386 s->authorized_macs[j], ETH_ALEN); 3387 i++; 3388 } 3389 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union", 3390 (u8 *) reg->authorized_macs_union, 3391 sizeof(reg->authorized_macs_union)); 3392 } 3393 #endif /* CONFIG_WPS_UPNP */ 3394 3395 3396 static void wps_registrar_sel_reg_union(struct wps_registrar *reg) 3397 { 3398 #ifdef CONFIG_WPS_UPNP 3399 struct subscription *s; 3400 3401 if (reg->wps->wps_upnp == NULL) 3402 return; 3403 3404 dl_list_for_each(s, ®->wps->wps_upnp->subscriptions, 3405 struct subscription, list) { 3406 struct subscr_addr *sa; 3407 sa = dl_list_first(&s->addr_list, struct subscr_addr, list); 3408 if (sa) { 3409 wpa_printf(MSG_DEBUG, "WPS: External Registrar %s:%d", 3410 inet_ntoa(sa->saddr.sin_addr), 3411 ntohs(sa->saddr.sin_port)); 3412 } 3413 if (s->selected_registrar) 3414 wps_registrar_sel_reg_add(reg, s); 3415 else 3416 wpa_printf(MSG_DEBUG, "WPS: External Registrar not " 3417 "selected"); 3418 } 3419 #endif /* CONFIG_WPS_UPNP */ 3420 } 3421 3422 3423 /** 3424 * wps_registrar_selected_registrar_changed - SetSelectedRegistrar change 3425 * @reg: Registrar data from wps_registrar_init() 3426 * 3427 * This function is called when selected registrar state changes, e.g., when an 3428 * AP receives a SetSelectedRegistrar UPnP message. 3429 */ 3430 void wps_registrar_selected_registrar_changed(struct wps_registrar *reg, 3431 u16 dev_pw_id) 3432 { 3433 wpa_printf(MSG_DEBUG, "WPS: Selected registrar information changed"); 3434 3435 reg->sel_reg_union = reg->selected_registrar; 3436 reg->sel_reg_dev_password_id_override = -1; 3437 reg->sel_reg_config_methods_override = -1; 3438 os_memcpy(reg->authorized_macs_union, reg->authorized_macs, 3439 WPS_MAX_AUTHORIZED_MACS * ETH_ALEN); 3440 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union (start with own)", 3441 (u8 *) reg->authorized_macs_union, 3442 sizeof(reg->authorized_macs_union)); 3443 if (reg->selected_registrar) { 3444 u16 methods; 3445 3446 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 3447 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 3448 WPS_CONFIG_PHY_PUSHBUTTON); 3449 if (reg->pbc) { 3450 reg->sel_reg_dev_password_id_override = 3451 DEV_PW_PUSHBUTTON; 3452 wps_set_pushbutton(&methods, reg->wps->config_methods); 3453 } else if (dev_pw_id) 3454 reg->sel_reg_dev_password_id_override = dev_pw_id; 3455 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar selected " 3456 "(pbc=%d)", reg->pbc); 3457 reg->sel_reg_config_methods_override = methods; 3458 } else 3459 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar not selected"); 3460 3461 wps_registrar_sel_reg_union(reg); 3462 3463 wps_set_ie(reg); 3464 wps_cb_set_sel_reg(reg); 3465 } 3466 3467 3468 int wps_registrar_get_info(struct wps_registrar *reg, const u8 *addr, 3469 char *buf, size_t buflen) 3470 { 3471 struct wps_registrar_device *d; 3472 int len = 0, ret; 3473 char uuid[40]; 3474 char devtype[WPS_DEV_TYPE_BUFSIZE]; 3475 3476 d = wps_device_get(reg, addr); 3477 if (d == NULL) 3478 return 0; 3479 if (uuid_bin2str(d->uuid, uuid, sizeof(uuid))) 3480 return 0; 3481 3482 ret = os_snprintf(buf + len, buflen - len, 3483 "wpsUuid=%s\n" 3484 "wpsPrimaryDeviceType=%s\n" 3485 "wpsDeviceName=%s\n" 3486 "wpsManufacturer=%s\n" 3487 "wpsModelName=%s\n" 3488 "wpsModelNumber=%s\n" 3489 "wpsSerialNumber=%s\n", 3490 uuid, 3491 wps_dev_type_bin2str(d->dev.pri_dev_type, devtype, 3492 sizeof(devtype)), 3493 d->dev.device_name ? d->dev.device_name : "", 3494 d->dev.manufacturer ? d->dev.manufacturer : "", 3495 d->dev.model_name ? d->dev.model_name : "", 3496 d->dev.model_number ? d->dev.model_number : "", 3497 d->dev.serial_number ? d->dev.serial_number : ""); 3498 if (ret < 0 || (size_t) ret >= buflen - len) 3499 return len; 3500 len += ret; 3501 3502 return len; 3503 } 3504 3505 3506 int wps_registrar_config_ap(struct wps_registrar *reg, 3507 struct wps_credential *cred) 3508 { 3509 wpa_printf(MSG_DEBUG, "WPS: encr_type=0x%x", cred->encr_type); 3510 if (!(cred->encr_type & (WPS_ENCR_NONE | WPS_ENCR_TKIP | 3511 WPS_ENCR_AES))) { 3512 if (cred->encr_type & WPS_ENCR_WEP) { 3513 wpa_printf(MSG_INFO, "WPS: Reject new AP settings " 3514 "due to WEP configuration"); 3515 return -1; 3516 } 3517 3518 wpa_printf(MSG_INFO, "WPS: Reject new AP settings due to " 3519 "invalid encr_type 0x%x", cred->encr_type); 3520 return -1; 3521 } 3522 3523 if ((cred->encr_type & (WPS_ENCR_TKIP | WPS_ENCR_AES)) == 3524 WPS_ENCR_TKIP) { 3525 wpa_printf(MSG_DEBUG, "WPS: Upgrade encr_type TKIP -> " 3526 "TKIP+AES"); 3527 cred->encr_type |= WPS_ENCR_AES; 3528 } 3529 3530 if ((cred->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) == 3531 WPS_AUTH_WPAPSK) { 3532 wpa_printf(MSG_DEBUG, "WPS: Upgrade auth_type WPAPSK -> " 3533 "WPAPSK+WPA2PSK"); 3534 cred->auth_type |= WPS_AUTH_WPA2PSK; 3535 } 3536 3537 if (reg->wps->cred_cb) 3538 return reg->wps->cred_cb(reg->wps->cb_ctx, cred); 3539 3540 return -1; 3541 } 3542 3543 3544 #ifdef CONFIG_WPS_NFC 3545 3546 int wps_registrar_add_nfc_pw_token(struct wps_registrar *reg, 3547 const u8 *pubkey_hash, u16 pw_id, 3548 const u8 *dev_pw, size_t dev_pw_len, 3549 int pk_hash_provided_oob) 3550 { 3551 struct wps_nfc_pw_token *token; 3552 3553 if (dev_pw_len > WPS_OOB_DEVICE_PASSWORD_LEN) 3554 return -1; 3555 3556 if (pw_id == DEV_PW_NFC_CONNECTION_HANDOVER && 3557 (pubkey_hash == NULL || !pk_hash_provided_oob)) { 3558 wpa_printf(MSG_DEBUG, "WPS: Unexpected NFC Password Token " 3559 "addition - missing public key hash"); 3560 return -1; 3561 } 3562 3563 wps_free_nfc_pw_tokens(®->nfc_pw_tokens, pw_id); 3564 3565 token = os_zalloc(sizeof(*token)); 3566 if (token == NULL) 3567 return -1; 3568 3569 token->peer_pk_hash_known = pubkey_hash != NULL; 3570 if (pubkey_hash) 3571 os_memcpy(token->pubkey_hash, pubkey_hash, 3572 WPS_OOB_PUBKEY_HASH_LEN); 3573 token->pw_id = pw_id; 3574 token->pk_hash_provided_oob = pk_hash_provided_oob; 3575 if (dev_pw) { 3576 wpa_snprintf_hex_uppercase((char *) token->dev_pw, 3577 sizeof(token->dev_pw), 3578 dev_pw, dev_pw_len); 3579 token->dev_pw_len = dev_pw_len * 2; 3580 } 3581 3582 dl_list_add(®->nfc_pw_tokens, &token->list); 3583 3584 reg->selected_registrar = 1; 3585 reg->pbc = 0; 3586 wps_registrar_add_authorized_mac(reg, 3587 (u8 *) "\xff\xff\xff\xff\xff\xff"); 3588 wps_registrar_selected_registrar_changed(reg, pw_id); 3589 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 3590 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, 3591 wps_registrar_set_selected_timeout, 3592 reg, NULL); 3593 3594 wpa_printf(MSG_DEBUG, "WPS: Added NFC Device Password %u to Registrar", 3595 pw_id); 3596 3597 return 0; 3598 } 3599 3600 3601 int wps_registrar_add_nfc_password_token(struct wps_registrar *reg, 3602 const u8 *oob_dev_pw, 3603 size_t oob_dev_pw_len) 3604 { 3605 const u8 *pos, *hash, *dev_pw; 3606 u16 id; 3607 size_t dev_pw_len; 3608 3609 if (oob_dev_pw_len < WPS_OOB_PUBKEY_HASH_LEN + 2 || 3610 oob_dev_pw_len > WPS_OOB_PUBKEY_HASH_LEN + 2 + 3611 WPS_OOB_DEVICE_PASSWORD_LEN) 3612 return -1; 3613 3614 hash = oob_dev_pw; 3615 pos = oob_dev_pw + WPS_OOB_PUBKEY_HASH_LEN; 3616 id = WPA_GET_BE16(pos); 3617 dev_pw = pos + 2; 3618 dev_pw_len = oob_dev_pw + oob_dev_pw_len - dev_pw; 3619 3620 wpa_printf(MSG_DEBUG, "WPS: Add NFC Password Token for Password ID %u", 3621 id); 3622 3623 wpa_hexdump(MSG_DEBUG, "WPS: Public Key Hash", 3624 hash, WPS_OOB_PUBKEY_HASH_LEN); 3625 wpa_hexdump_key(MSG_DEBUG, "WPS: Device Password", dev_pw, dev_pw_len); 3626 3627 return wps_registrar_add_nfc_pw_token(reg, hash, id, dev_pw, 3628 dev_pw_len, 0); 3629 } 3630 3631 3632 void wps_registrar_remove_nfc_pw_token(struct wps_registrar *reg, 3633 struct wps_nfc_pw_token *token) 3634 { 3635 wps_registrar_remove_authorized_mac(reg, 3636 (u8 *) "\xff\xff\xff\xff\xff\xff"); 3637 wps_registrar_selected_registrar_changed(reg, 0); 3638 3639 /* 3640 * Free the NFC password token if it was used only for a single protocol 3641 * run. The static handover case uses the same password token multiple 3642 * times, so do not free that case here. 3643 */ 3644 if (token->peer_pk_hash_known) 3645 os_free(token); 3646 } 3647 3648 #endif /* CONFIG_WPS_NFC */ 3649
