1 /* 2 * Wi-Fi Protected Setup - Registrar 3 * Copyright (c) 2008-2009, 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 struct wps_uuid_pin { 30 struct dl_list list; 31 u8 uuid[WPS_UUID_LEN]; 32 int wildcard_uuid; 33 u8 *pin; 34 size_t pin_len; 35 #define PIN_LOCKED BIT(0) 36 #define PIN_EXPIRES BIT(1) 37 int flags; 38 struct os_time expiration; 39 u8 enrollee_addr[ETH_ALEN]; 40 }; 41 42 43 static void wps_free_pin(struct wps_uuid_pin *pin) 44 { 45 os_free(pin->pin); 46 os_free(pin); 47 } 48 49 50 static void wps_remove_pin(struct wps_uuid_pin *pin) 51 { 52 dl_list_del(&pin->list); 53 wps_free_pin(pin); 54 } 55 56 57 static void wps_free_pins(struct dl_list *pins) 58 { 59 struct wps_uuid_pin *pin, *prev; 60 dl_list_for_each_safe(pin, prev, pins, struct wps_uuid_pin, list) 61 wps_remove_pin(pin); 62 } 63 64 65 struct wps_pbc_session { 66 struct wps_pbc_session *next; 67 u8 addr[ETH_ALEN]; 68 u8 uuid_e[WPS_UUID_LEN]; 69 struct os_time timestamp; 70 }; 71 72 73 static void wps_free_pbc_sessions(struct wps_pbc_session *pbc) 74 { 75 struct wps_pbc_session *prev; 76 77 while (pbc) { 78 prev = pbc; 79 pbc = pbc->next; 80 os_free(prev); 81 } 82 } 83 84 85 struct wps_registrar_device { 86 struct wps_registrar_device *next; 87 struct wps_device_data dev; 88 u8 uuid[WPS_UUID_LEN]; 89 }; 90 91 92 struct wps_registrar { 93 struct wps_context *wps; 94 95 int pbc; 96 int selected_registrar; 97 98 int (*new_psk_cb)(void *ctx, const u8 *mac_addr, const u8 *psk, 99 size_t psk_len); 100 int (*set_ie_cb)(void *ctx, struct wpabuf *beacon_ie, 101 struct wpabuf *probe_resp_ie); 102 void (*pin_needed_cb)(void *ctx, const u8 *uuid_e, 103 const struct wps_device_data *dev); 104 void (*reg_success_cb)(void *ctx, const u8 *mac_addr, 105 const u8 *uuid_e); 106 void (*set_sel_reg_cb)(void *ctx, int sel_reg, u16 dev_passwd_id, 107 u16 sel_reg_config_methods); 108 void (*enrollee_seen_cb)(void *ctx, const u8 *addr, const u8 *uuid_e, 109 const u8 *pri_dev_type, u16 config_methods, 110 u16 dev_password_id, u8 request_type, 111 const char *dev_name); 112 void *cb_ctx; 113 114 struct dl_list pins; 115 struct wps_pbc_session *pbc_sessions; 116 117 int skip_cred_build; 118 struct wpabuf *extra_cred; 119 int disable_auto_conf; 120 int sel_reg_union; 121 int sel_reg_dev_password_id_override; 122 int sel_reg_config_methods_override; 123 int static_wep_only; 124 int dualband; 125 126 struct wps_registrar_device *devices; 127 128 int force_pbc_overlap; 129 130 u8 authorized_macs[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN]; 131 u8 authorized_macs_union[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN]; 132 133 u8 p2p_dev_addr[ETH_ALEN]; 134 }; 135 136 137 static int wps_set_ie(struct wps_registrar *reg); 138 static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx); 139 static void wps_registrar_set_selected_timeout(void *eloop_ctx, 140 void *timeout_ctx); 141 142 143 static void wps_registrar_add_authorized_mac(struct wps_registrar *reg, 144 const u8 *addr) 145 { 146 int i; 147 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC " MACSTR, 148 MAC2STR(addr)); 149 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) 150 if (os_memcmp(reg->authorized_macs[i], addr, ETH_ALEN) == 0) { 151 wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was " 152 "already in the list"); 153 return; /* already in list */ 154 } 155 for (i = WPS_MAX_AUTHORIZED_MACS - 1; i > 0; i--) 156 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i - 1], 157 ETH_ALEN); 158 os_memcpy(reg->authorized_macs[0], addr, ETH_ALEN); 159 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs", 160 (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs)); 161 } 162 163 164 static void wps_registrar_remove_authorized_mac(struct wps_registrar *reg, 165 const u8 *addr) 166 { 167 int i; 168 wpa_printf(MSG_DEBUG, "WPS: Remove authorized MAC " MACSTR, 169 MAC2STR(addr)); 170 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) { 171 if (os_memcmp(reg->authorized_macs, addr, ETH_ALEN) == 0) 172 break; 173 } 174 if (i == WPS_MAX_AUTHORIZED_MACS) { 175 wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was not in the " 176 "list"); 177 return; /* not in the list */ 178 } 179 for (; i + 1 < WPS_MAX_AUTHORIZED_MACS; i++) 180 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i + 1], 181 ETH_ALEN); 182 os_memset(reg->authorized_macs[WPS_MAX_AUTHORIZED_MACS - 1], 0, 183 ETH_ALEN); 184 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs", 185 (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs)); 186 } 187 188 189 static void wps_free_devices(struct wps_registrar_device *dev) 190 { 191 struct wps_registrar_device *prev; 192 193 while (dev) { 194 prev = dev; 195 dev = dev->next; 196 wps_device_data_free(&prev->dev); 197 os_free(prev); 198 } 199 } 200 201 202 static struct wps_registrar_device * wps_device_get(struct wps_registrar *reg, 203 const u8 *addr) 204 { 205 struct wps_registrar_device *dev; 206 207 for (dev = reg->devices; dev; dev = dev->next) { 208 if (os_memcmp(dev->dev.mac_addr, addr, ETH_ALEN) == 0) 209 return dev; 210 } 211 return NULL; 212 } 213 214 215 static void wps_device_clone_data(struct wps_device_data *dst, 216 struct wps_device_data *src) 217 { 218 os_memcpy(dst->mac_addr, src->mac_addr, ETH_ALEN); 219 os_memcpy(dst->pri_dev_type, src->pri_dev_type, WPS_DEV_TYPE_LEN); 220 221 #define WPS_STRDUP(n) \ 222 os_free(dst->n); \ 223 dst->n = src->n ? os_strdup(src->n) : NULL 224 225 WPS_STRDUP(device_name); 226 WPS_STRDUP(manufacturer); 227 WPS_STRDUP(model_name); 228 WPS_STRDUP(model_number); 229 WPS_STRDUP(serial_number); 230 #undef WPS_STRDUP 231 } 232 233 234 int wps_device_store(struct wps_registrar *reg, 235 struct wps_device_data *dev, const u8 *uuid) 236 { 237 struct wps_registrar_device *d; 238 239 d = wps_device_get(reg, dev->mac_addr); 240 if (d == NULL) { 241 d = os_zalloc(sizeof(*d)); 242 if (d == NULL) 243 return -1; 244 d->next = reg->devices; 245 reg->devices = d; 246 } 247 248 wps_device_clone_data(&d->dev, dev); 249 os_memcpy(d->uuid, uuid, WPS_UUID_LEN); 250 251 return 0; 252 } 253 254 255 static void wps_registrar_add_pbc_session(struct wps_registrar *reg, 256 const u8 *addr, const u8 *uuid_e) 257 { 258 struct wps_pbc_session *pbc, *prev = NULL; 259 struct os_time now; 260 261 os_get_time(&now); 262 263 pbc = reg->pbc_sessions; 264 while (pbc) { 265 if (os_memcmp(pbc->addr, addr, ETH_ALEN) == 0 && 266 os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0) { 267 if (prev) 268 prev->next = pbc->next; 269 else 270 reg->pbc_sessions = pbc->next; 271 break; 272 } 273 prev = pbc; 274 pbc = pbc->next; 275 } 276 277 if (!pbc) { 278 pbc = os_zalloc(sizeof(*pbc)); 279 if (pbc == NULL) 280 return; 281 os_memcpy(pbc->addr, addr, ETH_ALEN); 282 if (uuid_e) 283 os_memcpy(pbc->uuid_e, uuid_e, WPS_UUID_LEN); 284 } 285 286 pbc->next = reg->pbc_sessions; 287 reg->pbc_sessions = pbc; 288 pbc->timestamp = now; 289 290 /* remove entries that have timed out */ 291 prev = pbc; 292 pbc = pbc->next; 293 294 while (pbc) { 295 if (now.sec > pbc->timestamp.sec + WPS_PBC_WALK_TIME) { 296 prev->next = NULL; 297 wps_free_pbc_sessions(pbc); 298 break; 299 } 300 prev = pbc; 301 pbc = pbc->next; 302 } 303 } 304 305 306 static void wps_registrar_remove_pbc_session(struct wps_registrar *reg, 307 const u8 *uuid_e, 308 const u8 *p2p_dev_addr) 309 { 310 struct wps_pbc_session *pbc, *prev = NULL, *tmp; 311 312 pbc = reg->pbc_sessions; 313 while (pbc) { 314 if (os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0 || 315 #ifdef ANDROID_P2P 316 (p2p_dev_addr && !is_zero_ether_addr(pbc->addr) && 317 os_memcmp(pbc->addr, p2p_dev_addr, ETH_ALEN) == 318 #else 319 (p2p_dev_addr && !is_zero_ether_addr(reg->p2p_dev_addr) && 320 os_memcmp(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN) == 321 #endif 322 0)) { 323 if (prev) 324 prev->next = pbc->next; 325 else 326 reg->pbc_sessions = pbc->next; 327 tmp = pbc; 328 pbc = pbc->next; 329 wpa_printf(MSG_DEBUG, "WPS: Removing PBC session for " 330 "addr=" MACSTR, MAC2STR(tmp->addr)); 331 wpa_hexdump(MSG_DEBUG, "WPS: Removed UUID-E", 332 tmp->uuid_e, WPS_UUID_LEN); 333 os_free(tmp); 334 continue; 335 } 336 prev = pbc; 337 pbc = pbc->next; 338 } 339 } 340 341 342 int wps_registrar_pbc_overlap(struct wps_registrar *reg, 343 const u8 *addr, const u8 *uuid_e) 344 { 345 int count = 0; 346 struct wps_pbc_session *pbc; 347 struct wps_pbc_session *first = NULL; 348 struct os_time now; 349 350 os_get_time(&now); 351 352 wpa_printf(MSG_DEBUG, "WPS: Checking active PBC sessions for overlap"); 353 354 if (uuid_e) { 355 wpa_printf(MSG_DEBUG, "WPS: Add one for the requested UUID"); 356 wpa_hexdump(MSG_DEBUG, "WPS: Requested UUID", 357 uuid_e, WPS_UUID_LEN); 358 count++; 359 } 360 361 for (pbc = reg->pbc_sessions; pbc; pbc = pbc->next) { 362 wpa_printf(MSG_DEBUG, "WPS: Consider PBC session with " MACSTR, 363 MAC2STR(pbc->addr)); 364 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", 365 pbc->uuid_e, WPS_UUID_LEN); 366 if (now.sec > pbc->timestamp.sec + WPS_PBC_WALK_TIME) { 367 wpa_printf(MSG_DEBUG, "WPS: PBC walk time has " 368 "expired"); 369 break; 370 } 371 if (first && 372 os_memcmp(pbc->uuid_e, first->uuid_e, WPS_UUID_LEN) == 0) { 373 wpa_printf(MSG_DEBUG, "WPS: Same Enrollee"); 374 continue; /* same Enrollee */ 375 } 376 if (uuid_e == NULL || 377 os_memcmp(uuid_e, pbc->uuid_e, WPS_UUID_LEN)) { 378 wpa_printf(MSG_DEBUG, "WPS: New Enrollee"); 379 count++; 380 } 381 if (first == NULL) 382 first = pbc; 383 } 384 385 wpa_printf(MSG_DEBUG, "WPS: %u active PBC session(s) found", count); 386 387 return count > 1 ? 1 : 0; 388 } 389 390 391 static int wps_build_wps_state(struct wps_context *wps, struct wpabuf *msg) 392 { 393 wpa_printf(MSG_DEBUG, "WPS: * Wi-Fi Protected Setup State (%d)", 394 wps->wps_state); 395 wpabuf_put_be16(msg, ATTR_WPS_STATE); 396 wpabuf_put_be16(msg, 1); 397 wpabuf_put_u8(msg, wps->wps_state); 398 return 0; 399 } 400 401 402 #ifdef CONFIG_WPS_UPNP 403 static void wps_registrar_free_pending_m2(struct wps_context *wps) 404 { 405 struct upnp_pending_message *p, *p2, *prev = NULL; 406 p = wps->upnp_msgs; 407 while (p) { 408 if (p->type == WPS_M2 || p->type == WPS_M2D) { 409 if (prev == NULL) 410 wps->upnp_msgs = p->next; 411 else 412 prev->next = p->next; 413 wpa_printf(MSG_DEBUG, "WPS UPnP: Drop pending M2/M2D"); 414 p2 = p; 415 p = p->next; 416 wpabuf_free(p2->msg); 417 os_free(p2); 418 continue; 419 } 420 prev = p; 421 p = p->next; 422 } 423 } 424 #endif /* CONFIG_WPS_UPNP */ 425 426 427 static int wps_build_ap_setup_locked(struct wps_context *wps, 428 struct wpabuf *msg) 429 { 430 if (wps->ap_setup_locked && wps->ap_setup_locked != 2) { 431 wpa_printf(MSG_DEBUG, "WPS: * AP Setup Locked"); 432 wpabuf_put_be16(msg, ATTR_AP_SETUP_LOCKED); 433 wpabuf_put_be16(msg, 1); 434 wpabuf_put_u8(msg, 1); 435 } 436 return 0; 437 } 438 439 440 static int wps_build_selected_registrar(struct wps_registrar *reg, 441 struct wpabuf *msg) 442 { 443 if (!reg->sel_reg_union) 444 return 0; 445 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar"); 446 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR); 447 wpabuf_put_be16(msg, 1); 448 wpabuf_put_u8(msg, 1); 449 return 0; 450 } 451 452 453 static int wps_build_sel_reg_dev_password_id(struct wps_registrar *reg, 454 struct wpabuf *msg) 455 { 456 u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT; 457 if (!reg->sel_reg_union) 458 return 0; 459 if (reg->sel_reg_dev_password_id_override >= 0) 460 id = reg->sel_reg_dev_password_id_override; 461 wpa_printf(MSG_DEBUG, "WPS: * Device Password ID (%d)", id); 462 wpabuf_put_be16(msg, ATTR_DEV_PASSWORD_ID); 463 wpabuf_put_be16(msg, 2); 464 wpabuf_put_be16(msg, id); 465 return 0; 466 } 467 468 469 static int wps_build_sel_pbc_reg_uuid_e(struct wps_registrar *reg, 470 struct wpabuf *msg) 471 { 472 u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT; 473 if (!reg->sel_reg_union) 474 return 0; 475 if (reg->sel_reg_dev_password_id_override >= 0) 476 id = reg->sel_reg_dev_password_id_override; 477 if (id != DEV_PW_PUSHBUTTON || !reg->dualband) 478 return 0; 479 return wps_build_uuid_e(msg, reg->wps->uuid); 480 } 481 482 483 static void wps_set_pushbutton(u16 *methods, u16 conf_methods) 484 { 485 *methods |= WPS_CONFIG_PUSHBUTTON; 486 #ifdef CONFIG_WPS2 487 if (conf_methods & WPS_CONFIG_VIRT_PUSHBUTTON) 488 *methods |= WPS_CONFIG_VIRT_PUSHBUTTON; 489 if (conf_methods & WPS_CONFIG_PHY_PUSHBUTTON) 490 *methods |= WPS_CONFIG_PHY_PUSHBUTTON; 491 if (!(*methods & (WPS_CONFIG_VIRT_PUSHBUTTON | 492 WPS_CONFIG_PHY_PUSHBUTTON))) { 493 /* 494 * Required to include virtual/physical flag, but we were not 495 * configured with push button type, so have to default to one 496 * of them. 497 */ 498 *methods |= WPS_CONFIG_PHY_PUSHBUTTON; 499 } 500 #endif /* CONFIG_WPS2 */ 501 } 502 503 504 static int wps_build_sel_reg_config_methods(struct wps_registrar *reg, 505 struct wpabuf *msg) 506 { 507 u16 methods; 508 if (!reg->sel_reg_union) 509 return 0; 510 methods = reg->wps->config_methods; 511 methods &= ~WPS_CONFIG_PUSHBUTTON; 512 #ifdef CONFIG_WPS2 513 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 514 WPS_CONFIG_PHY_PUSHBUTTON); 515 #endif /* CONFIG_WPS2 */ 516 if (reg->pbc) 517 wps_set_pushbutton(&methods, reg->wps->config_methods); 518 if (reg->sel_reg_config_methods_override >= 0) 519 methods = reg->sel_reg_config_methods_override; 520 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar Config Methods (%x)", 521 methods); 522 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR_CONFIG_METHODS); 523 wpabuf_put_be16(msg, 2); 524 wpabuf_put_be16(msg, methods); 525 return 0; 526 } 527 528 529 static int wps_build_probe_config_methods(struct wps_registrar *reg, 530 struct wpabuf *msg) 531 { 532 u16 methods; 533 /* 534 * These are the methods that the AP supports as an Enrollee for adding 535 * external Registrars. 536 */ 537 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 538 #ifdef CONFIG_WPS2 539 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 540 WPS_CONFIG_PHY_PUSHBUTTON); 541 #endif /* CONFIG_WPS2 */ 542 wpa_printf(MSG_DEBUG, "WPS: * Config Methods (%x)", methods); 543 wpabuf_put_be16(msg, ATTR_CONFIG_METHODS); 544 wpabuf_put_be16(msg, 2); 545 wpabuf_put_be16(msg, methods); 546 return 0; 547 } 548 549 550 static int wps_build_config_methods_r(struct wps_registrar *reg, 551 struct wpabuf *msg) 552 { 553 return wps_build_config_methods(msg, reg->wps->config_methods); 554 } 555 556 557 const u8 * wps_authorized_macs(struct wps_registrar *reg, size_t *count) 558 { 559 *count = 0; 560 561 #ifdef CONFIG_WPS2 562 while (*count < WPS_MAX_AUTHORIZED_MACS) { 563 if (is_zero_ether_addr(reg->authorized_macs_union[*count])) 564 break; 565 (*count)++; 566 } 567 #endif /* CONFIG_WPS2 */ 568 569 return (const u8 *) reg->authorized_macs_union; 570 } 571 572 573 /** 574 * wps_registrar_init - Initialize WPS Registrar data 575 * @wps: Pointer to longterm WPS context 576 * @cfg: Registrar configuration 577 * Returns: Pointer to allocated Registrar data or %NULL on failure 578 * 579 * This function is used to initialize WPS Registrar functionality. It can be 580 * used for a single Registrar run (e.g., when run in a supplicant) or multiple 581 * runs (e.g., when run as an internal Registrar in an AP). Caller is 582 * responsible for freeing the returned data with wps_registrar_deinit() when 583 * Registrar functionality is not needed anymore. 584 */ 585 struct wps_registrar * 586 wps_registrar_init(struct wps_context *wps, 587 const struct wps_registrar_config *cfg) 588 { 589 struct wps_registrar *reg = os_zalloc(sizeof(*reg)); 590 if (reg == NULL) 591 return NULL; 592 593 dl_list_init(®->pins); 594 reg->wps = wps; 595 reg->new_psk_cb = cfg->new_psk_cb; 596 reg->set_ie_cb = cfg->set_ie_cb; 597 reg->pin_needed_cb = cfg->pin_needed_cb; 598 reg->reg_success_cb = cfg->reg_success_cb; 599 reg->set_sel_reg_cb = cfg->set_sel_reg_cb; 600 reg->enrollee_seen_cb = cfg->enrollee_seen_cb; 601 reg->cb_ctx = cfg->cb_ctx; 602 reg->skip_cred_build = cfg->skip_cred_build; 603 if (cfg->extra_cred) { 604 reg->extra_cred = wpabuf_alloc_copy(cfg->extra_cred, 605 cfg->extra_cred_len); 606 if (reg->extra_cred == NULL) { 607 os_free(reg); 608 return NULL; 609 } 610 } 611 reg->disable_auto_conf = cfg->disable_auto_conf; 612 reg->sel_reg_dev_password_id_override = -1; 613 reg->sel_reg_config_methods_override = -1; 614 reg->static_wep_only = cfg->static_wep_only; 615 reg->dualband = cfg->dualband; 616 617 if (wps_set_ie(reg)) { 618 wps_registrar_deinit(reg); 619 return NULL; 620 } 621 622 return reg; 623 } 624 625 626 /** 627 * wps_registrar_deinit - Deinitialize WPS Registrar data 628 * @reg: Registrar data from wps_registrar_init() 629 */ 630 void wps_registrar_deinit(struct wps_registrar *reg) 631 { 632 if (reg == NULL) 633 return; 634 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 635 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 636 wps_free_pins(®->pins); 637 wps_free_pbc_sessions(reg->pbc_sessions); 638 wpabuf_free(reg->extra_cred); 639 wps_free_devices(reg->devices); 640 os_free(reg); 641 } 642 643 644 /** 645 * wps_registrar_add_pin - Configure a new PIN for Registrar 646 * @reg: Registrar data from wps_registrar_init() 647 * @addr: Enrollee MAC address or %NULL if not known 648 * @uuid: UUID-E or %NULL for wildcard (any UUID) 649 * @pin: PIN (Device Password) 650 * @pin_len: Length of pin in octets 651 * @timeout: Time (in seconds) when the PIN will be invalidated; 0 = no timeout 652 * Returns: 0 on success, -1 on failure 653 */ 654 int wps_registrar_add_pin(struct wps_registrar *reg, const u8 *addr, 655 const u8 *uuid, const u8 *pin, size_t pin_len, 656 int timeout) 657 { 658 struct wps_uuid_pin *p; 659 660 p = os_zalloc(sizeof(*p)); 661 if (p == NULL) 662 return -1; 663 if (addr) 664 os_memcpy(p->enrollee_addr, addr, ETH_ALEN); 665 if (uuid == NULL) 666 p->wildcard_uuid = 1; 667 else 668 os_memcpy(p->uuid, uuid, WPS_UUID_LEN); 669 p->pin = os_malloc(pin_len); 670 if (p->pin == NULL) { 671 os_free(p); 672 return -1; 673 } 674 os_memcpy(p->pin, pin, pin_len); 675 p->pin_len = pin_len; 676 677 if (timeout) { 678 p->flags |= PIN_EXPIRES; 679 os_get_time(&p->expiration); 680 p->expiration.sec += timeout; 681 } 682 683 dl_list_add(®->pins, &p->list); 684 685 wpa_printf(MSG_DEBUG, "WPS: A new PIN configured (timeout=%d)", 686 timeout); 687 wpa_hexdump(MSG_DEBUG, "WPS: UUID", uuid, WPS_UUID_LEN); 688 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: PIN", pin, pin_len); 689 reg->selected_registrar = 1; 690 reg->pbc = 0; 691 if (addr) 692 wps_registrar_add_authorized_mac(reg, addr); 693 else 694 wps_registrar_add_authorized_mac( 695 reg, (u8 *) "\xff\xff\xff\xff\xff\xff"); 696 wps_registrar_selected_registrar_changed(reg); 697 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 698 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, 699 wps_registrar_set_selected_timeout, 700 reg, NULL); 701 702 return 0; 703 } 704 705 706 static void wps_registrar_remove_pin(struct wps_registrar *reg, 707 struct wps_uuid_pin *pin) 708 { 709 u8 *addr; 710 u8 bcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 711 712 if (is_zero_ether_addr(pin->enrollee_addr)) 713 addr = bcast; 714 else 715 addr = pin->enrollee_addr; 716 wps_registrar_remove_authorized_mac(reg, addr); 717 wps_remove_pin(pin); 718 wps_registrar_selected_registrar_changed(reg); 719 } 720 721 722 static void wps_registrar_expire_pins(struct wps_registrar *reg) 723 { 724 struct wps_uuid_pin *pin, *prev; 725 struct os_time now; 726 727 os_get_time(&now); 728 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 729 { 730 if ((pin->flags & PIN_EXPIRES) && 731 os_time_before(&pin->expiration, &now)) { 732 wpa_hexdump(MSG_DEBUG, "WPS: Expired PIN for UUID", 733 pin->uuid, WPS_UUID_LEN); 734 wps_registrar_remove_pin(reg, pin); 735 } 736 } 737 } 738 739 740 /** 741 * wps_registrar_invalidate_wildcard_pin - Invalidate a wildcard PIN 742 * @reg: Registrar data from wps_registrar_init() 743 * Returns: 0 on success, -1 if not wildcard PIN is enabled 744 */ 745 static int wps_registrar_invalidate_wildcard_pin(struct wps_registrar *reg) 746 { 747 struct wps_uuid_pin *pin, *prev; 748 749 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 750 { 751 if (pin->wildcard_uuid) { 752 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID", 753 pin->uuid, WPS_UUID_LEN); 754 wps_registrar_remove_pin(reg, pin); 755 return 0; 756 } 757 } 758 759 return -1; 760 } 761 762 763 /** 764 * wps_registrar_invalidate_pin - Invalidate a PIN for a specific UUID-E 765 * @reg: Registrar data from wps_registrar_init() 766 * @uuid: UUID-E 767 * Returns: 0 on success, -1 on failure (e.g., PIN not found) 768 */ 769 int wps_registrar_invalidate_pin(struct wps_registrar *reg, const u8 *uuid) 770 { 771 struct wps_uuid_pin *pin, *prev; 772 773 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 774 { 775 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 776 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID", 777 pin->uuid, WPS_UUID_LEN); 778 wps_registrar_remove_pin(reg, pin); 779 return 0; 780 } 781 } 782 783 return -1; 784 } 785 786 787 static const u8 * wps_registrar_get_pin(struct wps_registrar *reg, 788 const u8 *uuid, size_t *pin_len) 789 { 790 struct wps_uuid_pin *pin, *found = NULL; 791 792 wps_registrar_expire_pins(reg); 793 794 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 795 if (!pin->wildcard_uuid && 796 os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 797 found = pin; 798 break; 799 } 800 } 801 802 if (!found) { 803 /* Check for wildcard UUIDs since none of the UUID-specific 804 * PINs matched */ 805 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 806 if (pin->wildcard_uuid == 1 || 807 pin->wildcard_uuid == 2) { 808 wpa_printf(MSG_DEBUG, "WPS: Found a wildcard " 809 "PIN. Assigned it for this UUID-E"); 810 pin->wildcard_uuid++; 811 os_memcpy(pin->uuid, uuid, WPS_UUID_LEN); 812 found = pin; 813 break; 814 } 815 } 816 } 817 818 if (!found) 819 return NULL; 820 821 /* 822 * Lock the PIN to avoid attacks based on concurrent re-use of the PIN 823 * that could otherwise avoid PIN invalidations. 824 */ 825 if (found->flags & PIN_LOCKED) { 826 wpa_printf(MSG_DEBUG, "WPS: Selected PIN locked - do not " 827 "allow concurrent re-use"); 828 return NULL; 829 } 830 *pin_len = found->pin_len; 831 found->flags |= PIN_LOCKED; 832 return found->pin; 833 } 834 835 836 /** 837 * wps_registrar_unlock_pin - Unlock a PIN for a specific UUID-E 838 * @reg: Registrar data from wps_registrar_init() 839 * @uuid: UUID-E 840 * Returns: 0 on success, -1 on failure 841 * 842 * PINs are locked to enforce only one concurrent use. This function unlocks a 843 * PIN to allow it to be used again. If the specified PIN was configured using 844 * a wildcard UUID, it will be removed instead of allowing multiple uses. 845 */ 846 int wps_registrar_unlock_pin(struct wps_registrar *reg, const u8 *uuid) 847 { 848 struct wps_uuid_pin *pin; 849 850 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 851 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 852 if (pin->wildcard_uuid == 3) { 853 wpa_printf(MSG_DEBUG, "WPS: Invalidating used " 854 "wildcard PIN"); 855 return wps_registrar_invalidate_pin(reg, uuid); 856 } 857 pin->flags &= ~PIN_LOCKED; 858 return 0; 859 } 860 } 861 862 return -1; 863 } 864 865 866 static void wps_registrar_stop_pbc(struct wps_registrar *reg) 867 { 868 reg->selected_registrar = 0; 869 reg->pbc = 0; 870 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN); 871 wps_registrar_remove_authorized_mac(reg, 872 (u8 *) "\xff\xff\xff\xff\xff\xff"); 873 wps_registrar_selected_registrar_changed(reg); 874 } 875 876 877 static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx) 878 { 879 struct wps_registrar *reg = eloop_ctx; 880 881 wpa_printf(MSG_DEBUG, "WPS: PBC timed out - disable PBC mode"); 882 wps_pbc_timeout_event(reg->wps); 883 wps_registrar_stop_pbc(reg); 884 } 885 886 887 /** 888 * wps_registrar_button_pushed - Notify Registrar that AP button was pushed 889 * @reg: Registrar data from wps_registrar_init() 890 * @p2p_dev_addr: Limit allowed PBC devices to the specified P2P device, %NULL 891 * indicates no such filtering 892 * Returns: 0 on success, -1 on failure, -2 on session overlap 893 * 894 * This function is called on an AP when a push button is pushed to activate 895 * PBC mode. The PBC mode will be stopped after walk time (2 minutes) timeout 896 * or when a PBC registration is completed. If more than one Enrollee in active 897 * PBC mode has been detected during the monitor time (previous 2 minutes), the 898 * PBC mode is not activated and -2 is returned to indicate session overlap. 899 * This is skipped if a specific Enrollee is selected. 900 */ 901 int wps_registrar_button_pushed(struct wps_registrar *reg, 902 const u8 *p2p_dev_addr) 903 { 904 if (p2p_dev_addr == NULL && 905 wps_registrar_pbc_overlap(reg, NULL, NULL)) { 906 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - do not start PBC " 907 "mode"); 908 wps_pbc_overlap_event(reg->wps); 909 return -2; 910 } 911 wpa_printf(MSG_DEBUG, "WPS: Button pushed - PBC mode started"); 912 reg->force_pbc_overlap = 0; 913 reg->selected_registrar = 1; 914 reg->pbc = 1; 915 if (p2p_dev_addr) 916 os_memcpy(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN); 917 else 918 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN); 919 wps_registrar_add_authorized_mac(reg, 920 (u8 *) "\xff\xff\xff\xff\xff\xff"); 921 wps_registrar_selected_registrar_changed(reg); 922 923 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 924 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 925 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wps_registrar_pbc_timeout, 926 reg, NULL); 927 return 0; 928 } 929 930 931 static void wps_registrar_pbc_completed(struct wps_registrar *reg) 932 { 933 wpa_printf(MSG_DEBUG, "WPS: PBC completed - stopping PBC mode"); 934 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 935 wps_registrar_stop_pbc(reg); 936 } 937 938 939 static void wps_registrar_pin_completed(struct wps_registrar *reg) 940 { 941 wpa_printf(MSG_DEBUG, "WPS: PIN completed using internal Registrar"); 942 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 943 reg->selected_registrar = 0; 944 wps_registrar_selected_registrar_changed(reg); 945 } 946 947 948 void wps_registrar_complete(struct wps_registrar *registrar, const u8 *uuid_e) 949 { 950 if (registrar->pbc) { 951 wps_registrar_remove_pbc_session(registrar, 952 uuid_e, NULL); 953 wps_registrar_pbc_completed(registrar); 954 } else { 955 wps_registrar_pin_completed(registrar); 956 } 957 } 958 959 960 int wps_registrar_wps_cancel(struct wps_registrar *reg) 961 { 962 if (reg->pbc) { 963 wpa_printf(MSG_DEBUG, "WPS: PBC is set - cancelling it"); 964 wps_registrar_pbc_timeout(reg, NULL); 965 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 966 return 1; 967 } else if (reg->selected_registrar) { 968 /* PIN Method */ 969 wpa_printf(MSG_DEBUG, "WPS: PIN is set - cancelling it"); 970 wps_registrar_pin_completed(reg); 971 wps_registrar_invalidate_wildcard_pin(reg); 972 return 1; 973 } 974 return 0; 975 } 976 977 978 /** 979 * wps_registrar_probe_req_rx - Notify Registrar of Probe Request 980 * @reg: Registrar data from wps_registrar_init() 981 * @addr: MAC address of the Probe Request sender 982 * @wps_data: WPS IE contents 983 * 984 * This function is called on an AP when a Probe Request with WPS IE is 985 * received. This is used to track PBC mode use and to detect possible overlap 986 * situation with other WPS APs. 987 */ 988 void wps_registrar_probe_req_rx(struct wps_registrar *reg, const u8 *addr, 989 const struct wpabuf *wps_data, 990 int p2p_wildcard) 991 { 992 struct wps_parse_attr attr; 993 994 wpa_hexdump_buf(MSG_MSGDUMP, 995 "WPS: Probe Request with WPS data received", 996 wps_data); 997 998 if (wps_parse_msg(wps_data, &attr) < 0) 999 return; 1000 1001 if (attr.config_methods == NULL) { 1002 wpa_printf(MSG_DEBUG, "WPS: No Config Methods attribute in " 1003 "Probe Request"); 1004 return; 1005 } 1006 1007 if (attr.dev_password_id == NULL) { 1008 wpa_printf(MSG_DEBUG, "WPS: No Device Password Id attribute " 1009 "in Probe Request"); 1010 return; 1011 } 1012 1013 if (reg->enrollee_seen_cb && attr.uuid_e && 1014 attr.primary_dev_type && attr.request_type && !p2p_wildcard) { 1015 char *dev_name = NULL; 1016 if (attr.dev_name) { 1017 dev_name = os_zalloc(attr.dev_name_len + 1); 1018 if (dev_name) { 1019 os_memcpy(dev_name, attr.dev_name, 1020 attr.dev_name_len); 1021 } 1022 } 1023 reg->enrollee_seen_cb(reg->cb_ctx, addr, attr.uuid_e, 1024 attr.primary_dev_type, 1025 WPA_GET_BE16(attr.config_methods), 1026 WPA_GET_BE16(attr.dev_password_id), 1027 *attr.request_type, dev_name); 1028 os_free(dev_name); 1029 } 1030 1031 if (WPA_GET_BE16(attr.dev_password_id) != DEV_PW_PUSHBUTTON) 1032 return; /* Not PBC */ 1033 1034 wpa_printf(MSG_DEBUG, "WPS: Probe Request for PBC received from " 1035 MACSTR, MAC2STR(addr)); 1036 if (attr.uuid_e == NULL) { 1037 wpa_printf(MSG_DEBUG, "WPS: Invalid Probe Request WPS IE: No " 1038 "UUID-E included"); 1039 return; 1040 } 1041 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E from Probe Request", attr.uuid_e, 1042 WPS_UUID_LEN); 1043 1044 wps_registrar_add_pbc_session(reg, addr, attr.uuid_e); 1045 if (wps_registrar_pbc_overlap(reg, addr, attr.uuid_e)) { 1046 wpa_printf(MSG_DEBUG, "WPS: PBC session overlap detected"); 1047 reg->force_pbc_overlap = 1; 1048 wps_pbc_overlap_event(reg->wps); 1049 } 1050 } 1051 1052 1053 static int wps_cb_new_psk(struct wps_registrar *reg, const u8 *mac_addr, 1054 const u8 *psk, size_t psk_len) 1055 { 1056 if (reg->new_psk_cb == NULL) 1057 return 0; 1058 1059 return reg->new_psk_cb(reg->cb_ctx, mac_addr, psk, psk_len); 1060 } 1061 1062 1063 static void wps_cb_pin_needed(struct wps_registrar *reg, const u8 *uuid_e, 1064 const struct wps_device_data *dev) 1065 { 1066 if (reg->pin_needed_cb == NULL) 1067 return; 1068 1069 reg->pin_needed_cb(reg->cb_ctx, uuid_e, dev); 1070 } 1071 1072 1073 static void wps_cb_reg_success(struct wps_registrar *reg, const u8 *mac_addr, 1074 const u8 *uuid_e) 1075 { 1076 if (reg->reg_success_cb == NULL) 1077 return; 1078 1079 reg->reg_success_cb(reg->cb_ctx, mac_addr, uuid_e); 1080 } 1081 1082 1083 static int wps_cb_set_ie(struct wps_registrar *reg, struct wpabuf *beacon_ie, 1084 struct wpabuf *probe_resp_ie) 1085 { 1086 return reg->set_ie_cb(reg->cb_ctx, beacon_ie, probe_resp_ie); 1087 } 1088 1089 1090 static void wps_cb_set_sel_reg(struct wps_registrar *reg) 1091 { 1092 u16 methods = 0; 1093 if (reg->set_sel_reg_cb == NULL) 1094 return; 1095 1096 if (reg->selected_registrar) { 1097 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 1098 #ifdef CONFIG_WPS2 1099 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 1100 WPS_CONFIG_PHY_PUSHBUTTON); 1101 #endif /* CONFIG_WPS2 */ 1102 if (reg->pbc) 1103 wps_set_pushbutton(&methods, reg->wps->config_methods); 1104 } 1105 1106 wpa_printf(MSG_DEBUG, "WPS: wps_cb_set_sel_reg: sel_reg=%d " 1107 "config_methods=0x%x pbc=%d methods=0x%x", 1108 reg->selected_registrar, reg->wps->config_methods, 1109 reg->pbc, methods); 1110 1111 reg->set_sel_reg_cb(reg->cb_ctx, reg->selected_registrar, 1112 reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT, 1113 methods); 1114 } 1115 1116 1117 static int wps_set_ie(struct wps_registrar *reg) 1118 { 1119 struct wpabuf *beacon; 1120 struct wpabuf *probe; 1121 const u8 *auth_macs; 1122 size_t count; 1123 size_t vendor_len = 0; 1124 int i; 1125 1126 if (reg->set_ie_cb == NULL) 1127 return 0; 1128 1129 for (i = 0; i < MAX_WPS_VENDOR_EXTENSIONS; i++) { 1130 if (reg->wps->dev.vendor_ext[i]) { 1131 vendor_len += 2 + 2; 1132 vendor_len += wpabuf_len(reg->wps->dev.vendor_ext[i]); 1133 } 1134 } 1135 1136 beacon = wpabuf_alloc(400 + vendor_len); 1137 if (beacon == NULL) 1138 return -1; 1139 probe = wpabuf_alloc(500 + vendor_len); 1140 if (probe == NULL) { 1141 wpabuf_free(beacon); 1142 return -1; 1143 } 1144 1145 auth_macs = wps_authorized_macs(reg, &count); 1146 1147 wpa_printf(MSG_DEBUG, "WPS: Build Beacon IEs"); 1148 1149 if (wps_build_version(beacon) || 1150 wps_build_wps_state(reg->wps, beacon) || 1151 wps_build_ap_setup_locked(reg->wps, beacon) || 1152 wps_build_selected_registrar(reg, beacon) || 1153 wps_build_sel_reg_dev_password_id(reg, beacon) || 1154 wps_build_sel_reg_config_methods(reg, beacon) || 1155 wps_build_sel_pbc_reg_uuid_e(reg, beacon) || 1156 (reg->dualband && wps_build_rf_bands(®->wps->dev, beacon)) || 1157 wps_build_wfa_ext(beacon, 0, auth_macs, count) || 1158 wps_build_vendor_ext(®->wps->dev, beacon)) { 1159 wpabuf_free(beacon); 1160 wpabuf_free(probe); 1161 return -1; 1162 } 1163 1164 #ifdef CONFIG_P2P 1165 if (wps_build_dev_name(®->wps->dev, beacon) || 1166 wps_build_primary_dev_type(®->wps->dev, beacon)) { 1167 wpabuf_free(beacon); 1168 wpabuf_free(probe); 1169 return -1; 1170 } 1171 #endif /* CONFIG_P2P */ 1172 1173 wpa_printf(MSG_DEBUG, "WPS: Build Probe Response IEs"); 1174 1175 if (wps_build_version(probe) || 1176 wps_build_wps_state(reg->wps, probe) || 1177 wps_build_ap_setup_locked(reg->wps, probe) || 1178 wps_build_selected_registrar(reg, probe) || 1179 wps_build_sel_reg_dev_password_id(reg, probe) || 1180 wps_build_sel_reg_config_methods(reg, probe) || 1181 wps_build_resp_type(probe, reg->wps->ap ? WPS_RESP_AP : 1182 WPS_RESP_REGISTRAR) || 1183 wps_build_uuid_e(probe, reg->wps->uuid) || 1184 wps_build_device_attrs(®->wps->dev, probe) || 1185 wps_build_probe_config_methods(reg, probe) || 1186 wps_build_rf_bands(®->wps->dev, probe) || 1187 wps_build_wfa_ext(probe, 0, auth_macs, count) || 1188 wps_build_vendor_ext(®->wps->dev, probe)) { 1189 wpabuf_free(beacon); 1190 wpabuf_free(probe); 1191 return -1; 1192 } 1193 1194 beacon = wps_ie_encapsulate(beacon); 1195 probe = wps_ie_encapsulate(probe); 1196 1197 if (!beacon || !probe) { 1198 wpabuf_free(beacon); 1199 wpabuf_free(probe); 1200 return -1; 1201 } 1202 1203 if (reg->static_wep_only) { 1204 /* 1205 * Windows XP and Vista clients can get confused about 1206 * EAP-Identity/Request when they probe the network with 1207 * EAPOL-Start. In such a case, they may assume the network is 1208 * using IEEE 802.1X and prompt user for a certificate while 1209 * the correct (non-WPS) behavior would be to ask for the 1210 * static WEP key. As a workaround, use Microsoft Provisioning 1211 * IE to advertise that legacy 802.1X is not supported. 1212 */ 1213 const u8 ms_wps[7] = { 1214 WLAN_EID_VENDOR_SPECIFIC, 5, 1215 /* Microsoft Provisioning IE (00:50:f2:5) */ 1216 0x00, 0x50, 0xf2, 5, 1217 0x00 /* no legacy 802.1X or MS WPS */ 1218 }; 1219 wpa_printf(MSG_DEBUG, "WPS: Add Microsoft Provisioning IE " 1220 "into Beacon/Probe Response frames"); 1221 wpabuf_put_data(beacon, ms_wps, sizeof(ms_wps)); 1222 wpabuf_put_data(probe, ms_wps, sizeof(ms_wps)); 1223 } 1224 1225 return wps_cb_set_ie(reg, beacon, probe); 1226 } 1227 1228 1229 static int wps_get_dev_password(struct wps_data *wps) 1230 { 1231 const u8 *pin; 1232 size_t pin_len = 0; 1233 1234 os_free(wps->dev_password); 1235 wps->dev_password = NULL; 1236 1237 if (wps->pbc) { 1238 wpa_printf(MSG_DEBUG, "WPS: Use default PIN for PBC"); 1239 pin = (const u8 *) "00000000"; 1240 pin_len = 8; 1241 } else { 1242 pin = wps_registrar_get_pin(wps->wps->registrar, wps->uuid_e, 1243 &pin_len); 1244 } 1245 if (pin == NULL) { 1246 wpa_printf(MSG_DEBUG, "WPS: No Device Password available for " 1247 "the Enrollee"); 1248 wps_cb_pin_needed(wps->wps->registrar, wps->uuid_e, 1249 &wps->peer_dev); 1250 return -1; 1251 } 1252 1253 wps->dev_password = os_malloc(pin_len); 1254 if (wps->dev_password == NULL) 1255 return -1; 1256 os_memcpy(wps->dev_password, pin, pin_len); 1257 wps->dev_password_len = pin_len; 1258 1259 return 0; 1260 } 1261 1262 1263 static int wps_build_uuid_r(struct wps_data *wps, struct wpabuf *msg) 1264 { 1265 wpa_printf(MSG_DEBUG, "WPS: * UUID-R"); 1266 wpabuf_put_be16(msg, ATTR_UUID_R); 1267 wpabuf_put_be16(msg, WPS_UUID_LEN); 1268 wpabuf_put_data(msg, wps->uuid_r, WPS_UUID_LEN); 1269 return 0; 1270 } 1271 1272 1273 static int wps_build_r_hash(struct wps_data *wps, struct wpabuf *msg) 1274 { 1275 u8 *hash; 1276 const u8 *addr[4]; 1277 size_t len[4]; 1278 1279 if (random_get_bytes(wps->snonce, 2 * WPS_SECRET_NONCE_LEN) < 0) 1280 return -1; 1281 wpa_hexdump(MSG_DEBUG, "WPS: R-S1", wps->snonce, WPS_SECRET_NONCE_LEN); 1282 wpa_hexdump(MSG_DEBUG, "WPS: R-S2", 1283 wps->snonce + WPS_SECRET_NONCE_LEN, WPS_SECRET_NONCE_LEN); 1284 1285 if (wps->dh_pubkey_e == NULL || wps->dh_pubkey_r == NULL) { 1286 wpa_printf(MSG_DEBUG, "WPS: DH public keys not available for " 1287 "R-Hash derivation"); 1288 return -1; 1289 } 1290 1291 wpa_printf(MSG_DEBUG, "WPS: * R-Hash1"); 1292 wpabuf_put_be16(msg, ATTR_R_HASH1); 1293 wpabuf_put_be16(msg, SHA256_MAC_LEN); 1294 hash = wpabuf_put(msg, SHA256_MAC_LEN); 1295 /* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */ 1296 addr[0] = wps->snonce; 1297 len[0] = WPS_SECRET_NONCE_LEN; 1298 addr[1] = wps->psk1; 1299 len[1] = WPS_PSK_LEN; 1300 addr[2] = wpabuf_head(wps->dh_pubkey_e); 1301 len[2] = wpabuf_len(wps->dh_pubkey_e); 1302 addr[3] = wpabuf_head(wps->dh_pubkey_r); 1303 len[3] = wpabuf_len(wps->dh_pubkey_r); 1304 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 1305 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash1", hash, SHA256_MAC_LEN); 1306 1307 wpa_printf(MSG_DEBUG, "WPS: * R-Hash2"); 1308 wpabuf_put_be16(msg, ATTR_R_HASH2); 1309 wpabuf_put_be16(msg, SHA256_MAC_LEN); 1310 hash = wpabuf_put(msg, SHA256_MAC_LEN); 1311 /* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */ 1312 addr[0] = wps->snonce + WPS_SECRET_NONCE_LEN; 1313 addr[1] = wps->psk2; 1314 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 1315 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash2", hash, SHA256_MAC_LEN); 1316 1317 return 0; 1318 } 1319 1320 1321 static int wps_build_r_snonce1(struct wps_data *wps, struct wpabuf *msg) 1322 { 1323 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce1"); 1324 wpabuf_put_be16(msg, ATTR_R_SNONCE1); 1325 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN); 1326 wpabuf_put_data(msg, wps->snonce, WPS_SECRET_NONCE_LEN); 1327 return 0; 1328 } 1329 1330 1331 static int wps_build_r_snonce2(struct wps_data *wps, struct wpabuf *msg) 1332 { 1333 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce2"); 1334 wpabuf_put_be16(msg, ATTR_R_SNONCE2); 1335 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN); 1336 wpabuf_put_data(msg, wps->snonce + WPS_SECRET_NONCE_LEN, 1337 WPS_SECRET_NONCE_LEN); 1338 return 0; 1339 } 1340 1341 1342 static int wps_build_cred_network_idx(struct wpabuf *msg, 1343 const struct wps_credential *cred) 1344 { 1345 wpa_printf(MSG_DEBUG, "WPS: * Network Index (1)"); 1346 wpabuf_put_be16(msg, ATTR_NETWORK_INDEX); 1347 wpabuf_put_be16(msg, 1); 1348 wpabuf_put_u8(msg, 1); 1349 return 0; 1350 } 1351 1352 1353 static int wps_build_cred_ssid(struct wpabuf *msg, 1354 const struct wps_credential *cred) 1355 { 1356 wpa_printf(MSG_DEBUG, "WPS: * SSID"); 1357 wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID for Credential", 1358 cred->ssid, cred->ssid_len); 1359 wpabuf_put_be16(msg, ATTR_SSID); 1360 wpabuf_put_be16(msg, cred->ssid_len); 1361 wpabuf_put_data(msg, cred->ssid, cred->ssid_len); 1362 return 0; 1363 } 1364 1365 1366 static int wps_build_cred_auth_type(struct wpabuf *msg, 1367 const struct wps_credential *cred) 1368 { 1369 wpa_printf(MSG_DEBUG, "WPS: * Authentication Type (0x%x)", 1370 cred->auth_type); 1371 wpabuf_put_be16(msg, ATTR_AUTH_TYPE); 1372 wpabuf_put_be16(msg, 2); 1373 wpabuf_put_be16(msg, cred->auth_type); 1374 return 0; 1375 } 1376 1377 1378 static int wps_build_cred_encr_type(struct wpabuf *msg, 1379 const struct wps_credential *cred) 1380 { 1381 wpa_printf(MSG_DEBUG, "WPS: * Encryption Type (0x%x)", 1382 cred->encr_type); 1383 wpabuf_put_be16(msg, ATTR_ENCR_TYPE); 1384 wpabuf_put_be16(msg, 2); 1385 wpabuf_put_be16(msg, cred->encr_type); 1386 return 0; 1387 } 1388 1389 1390 static int wps_build_cred_network_key(struct wpabuf *msg, 1391 const struct wps_credential *cred) 1392 { 1393 wpa_printf(MSG_DEBUG, "WPS: * Network Key (len=%d)", 1394 (int) cred->key_len); 1395 wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key", 1396 cred->key, cred->key_len); 1397 wpabuf_put_be16(msg, ATTR_NETWORK_KEY); 1398 wpabuf_put_be16(msg, cred->key_len); 1399 wpabuf_put_data(msg, cred->key, cred->key_len); 1400 return 0; 1401 } 1402 1403 1404 static int wps_build_cred_mac_addr(struct wpabuf *msg, 1405 const struct wps_credential *cred) 1406 { 1407 wpa_printf(MSG_DEBUG, "WPS: * MAC Address (" MACSTR ")", 1408 MAC2STR(cred->mac_addr)); 1409 wpabuf_put_be16(msg, ATTR_MAC_ADDR); 1410 wpabuf_put_be16(msg, ETH_ALEN); 1411 wpabuf_put_data(msg, cred->mac_addr, ETH_ALEN); 1412 return 0; 1413 } 1414 1415 1416 static int wps_build_credential(struct wpabuf *msg, 1417 const struct wps_credential *cred) 1418 { 1419 if (wps_build_cred_network_idx(msg, cred) || 1420 wps_build_cred_ssid(msg, cred) || 1421 wps_build_cred_auth_type(msg, cred) || 1422 wps_build_cred_encr_type(msg, cred) || 1423 wps_build_cred_network_key(msg, cred) || 1424 wps_build_cred_mac_addr(msg, cred)) 1425 return -1; 1426 return 0; 1427 } 1428 1429 1430 int wps_build_credential_wrap(struct wpabuf *msg, 1431 const struct wps_credential *cred) 1432 { 1433 struct wpabuf *wbuf; 1434 wbuf = wpabuf_alloc(200); 1435 if (wbuf == NULL) 1436 return -1; 1437 if (wps_build_credential(wbuf, cred)) { 1438 wpabuf_free(wbuf); 1439 return -1; 1440 } 1441 wpabuf_put_be16(msg, ATTR_CRED); 1442 wpabuf_put_be16(msg, wpabuf_len(wbuf)); 1443 wpabuf_put_buf(msg, wbuf); 1444 wpabuf_free(wbuf); 1445 return 0; 1446 } 1447 1448 1449 int wps_build_cred(struct wps_data *wps, struct wpabuf *msg) 1450 { 1451 struct wpabuf *cred; 1452 1453 if (wps->wps->registrar->skip_cred_build) 1454 goto skip_cred_build; 1455 1456 wpa_printf(MSG_DEBUG, "WPS: * Credential"); 1457 if (wps->use_cred) { 1458 os_memcpy(&wps->cred, wps->use_cred, sizeof(wps->cred)); 1459 goto use_provided; 1460 } 1461 os_memset(&wps->cred, 0, sizeof(wps->cred)); 1462 1463 os_memcpy(wps->cred.ssid, wps->wps->ssid, wps->wps->ssid_len); 1464 wps->cred.ssid_len = wps->wps->ssid_len; 1465 1466 /* Select the best authentication and encryption type */ 1467 if (wps->auth_type & WPS_AUTH_WPA2PSK) 1468 wps->auth_type = WPS_AUTH_WPA2PSK; 1469 else if (wps->auth_type & WPS_AUTH_WPAPSK) 1470 wps->auth_type = WPS_AUTH_WPAPSK; 1471 else if (wps->auth_type & WPS_AUTH_OPEN) 1472 wps->auth_type = WPS_AUTH_OPEN; 1473 else if (wps->auth_type & WPS_AUTH_SHARED) 1474 wps->auth_type = WPS_AUTH_SHARED; 1475 else { 1476 wpa_printf(MSG_DEBUG, "WPS: Unsupported auth_type 0x%x", 1477 wps->auth_type); 1478 return -1; 1479 } 1480 wps->cred.auth_type = wps->auth_type; 1481 1482 if (wps->auth_type == WPS_AUTH_WPA2PSK || 1483 wps->auth_type == WPS_AUTH_WPAPSK) { 1484 if (wps->encr_type & WPS_ENCR_AES) 1485 wps->encr_type = WPS_ENCR_AES; 1486 else if (wps->encr_type & WPS_ENCR_TKIP) 1487 wps->encr_type = WPS_ENCR_TKIP; 1488 else { 1489 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption " 1490 "type for WPA/WPA2"); 1491 return -1; 1492 } 1493 } else { 1494 if (wps->encr_type & WPS_ENCR_WEP) 1495 wps->encr_type = WPS_ENCR_WEP; 1496 else if (wps->encr_type & WPS_ENCR_NONE) 1497 wps->encr_type = WPS_ENCR_NONE; 1498 else { 1499 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption " 1500 "type for non-WPA/WPA2 mode"); 1501 return -1; 1502 } 1503 } 1504 wps->cred.encr_type = wps->encr_type; 1505 /* 1506 * Set MAC address in the Credential to be the Enrollee's MAC address 1507 */ 1508 os_memcpy(wps->cred.mac_addr, wps->mac_addr_e, ETH_ALEN); 1509 1510 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->wps->ap && 1511 !wps->wps->registrar->disable_auto_conf) { 1512 u8 r[16]; 1513 /* Generate a random passphrase */ 1514 if (random_get_bytes(r, sizeof(r)) < 0) 1515 return -1; 1516 os_free(wps->new_psk); 1517 wps->new_psk = base64_encode(r, sizeof(r), &wps->new_psk_len); 1518 if (wps->new_psk == NULL) 1519 return -1; 1520 wps->new_psk_len--; /* remove newline */ 1521 while (wps->new_psk_len && 1522 wps->new_psk[wps->new_psk_len - 1] == '=') 1523 wps->new_psk_len--; 1524 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Generated passphrase", 1525 wps->new_psk, wps->new_psk_len); 1526 os_memcpy(wps->cred.key, wps->new_psk, wps->new_psk_len); 1527 wps->cred.key_len = wps->new_psk_len; 1528 } else if (wps->use_psk_key && wps->wps->psk_set) { 1529 char hex[65]; 1530 wpa_printf(MSG_DEBUG, "WPS: Use PSK format for Network Key"); 1531 wpa_snprintf_hex(hex, sizeof(hex), wps->wps->psk, 32); 1532 os_memcpy(wps->cred.key, hex, 32 * 2); 1533 wps->cred.key_len = 32 * 2; 1534 } else if (wps->wps->network_key) { 1535 os_memcpy(wps->cred.key, wps->wps->network_key, 1536 wps->wps->network_key_len); 1537 wps->cred.key_len = wps->wps->network_key_len; 1538 } else if (wps->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) { 1539 char hex[65]; 1540 /* Generate a random per-device PSK */ 1541 os_free(wps->new_psk); 1542 wps->new_psk_len = 32; 1543 wps->new_psk = os_malloc(wps->new_psk_len); 1544 if (wps->new_psk == NULL) 1545 return -1; 1546 if (random_get_bytes(wps->new_psk, wps->new_psk_len) < 0) { 1547 os_free(wps->new_psk); 1548 wps->new_psk = NULL; 1549 return -1; 1550 } 1551 wpa_hexdump_key(MSG_DEBUG, "WPS: Generated per-device PSK", 1552 wps->new_psk, wps->new_psk_len); 1553 wpa_snprintf_hex(hex, sizeof(hex), wps->new_psk, 1554 wps->new_psk_len); 1555 os_memcpy(wps->cred.key, hex, wps->new_psk_len * 2); 1556 wps->cred.key_len = wps->new_psk_len * 2; 1557 } 1558 1559 use_provided: 1560 #ifdef CONFIG_WPS_TESTING 1561 if (wps_testing_dummy_cred) 1562 cred = wpabuf_alloc(200); 1563 else 1564 cred = NULL; 1565 if (cred) { 1566 struct wps_credential dummy; 1567 wpa_printf(MSG_DEBUG, "WPS: Add dummy credential"); 1568 os_memset(&dummy, 0, sizeof(dummy)); 1569 os_memcpy(dummy.ssid, "dummy", 5); 1570 dummy.ssid_len = 5; 1571 dummy.auth_type = WPS_AUTH_WPA2PSK; 1572 dummy.encr_type = WPS_ENCR_AES; 1573 os_memcpy(dummy.key, "dummy psk", 9); 1574 dummy.key_len = 9; 1575 os_memcpy(dummy.mac_addr, wps->mac_addr_e, ETH_ALEN); 1576 wps_build_credential(cred, &dummy); 1577 wpa_hexdump_buf(MSG_DEBUG, "WPS: Dummy Credential", cred); 1578 1579 wpabuf_put_be16(msg, ATTR_CRED); 1580 wpabuf_put_be16(msg, wpabuf_len(cred)); 1581 wpabuf_put_buf(msg, cred); 1582 1583 wpabuf_free(cred); 1584 } 1585 #endif /* CONFIG_WPS_TESTING */ 1586 1587 cred = wpabuf_alloc(200); 1588 if (cred == NULL) 1589 return -1; 1590 1591 if (wps_build_credential(cred, &wps->cred)) { 1592 wpabuf_free(cred); 1593 return -1; 1594 } 1595 1596 wpabuf_put_be16(msg, ATTR_CRED); 1597 wpabuf_put_be16(msg, wpabuf_len(cred)); 1598 wpabuf_put_buf(msg, cred); 1599 wpabuf_free(cred); 1600 1601 skip_cred_build: 1602 if (wps->wps->registrar->extra_cred) { 1603 wpa_printf(MSG_DEBUG, "WPS: * Credential (pre-configured)"); 1604 wpabuf_put_buf(msg, wps->wps->registrar->extra_cred); 1605 } 1606 1607 return 0; 1608 } 1609 1610 1611 static int wps_build_ap_settings(struct wps_data *wps, struct wpabuf *msg) 1612 { 1613 wpa_printf(MSG_DEBUG, "WPS: * AP Settings"); 1614 1615 if (wps_build_credential(msg, &wps->cred)) 1616 return -1; 1617 1618 return 0; 1619 } 1620 1621 1622 static struct wpabuf * wps_build_ap_cred(struct wps_data *wps) 1623 { 1624 struct wpabuf *msg, *plain; 1625 1626 msg = wpabuf_alloc(1000); 1627 if (msg == NULL) 1628 return NULL; 1629 1630 plain = wpabuf_alloc(200); 1631 if (plain == NULL) { 1632 wpabuf_free(msg); 1633 return NULL; 1634 } 1635 1636 if (wps_build_ap_settings(wps, plain)) { 1637 wpabuf_free(plain); 1638 wpabuf_free(msg); 1639 return NULL; 1640 } 1641 1642 wpabuf_put_be16(msg, ATTR_CRED); 1643 wpabuf_put_be16(msg, wpabuf_len(plain)); 1644 wpabuf_put_buf(msg, plain); 1645 wpabuf_free(plain); 1646 1647 return msg; 1648 } 1649 1650 1651 static struct wpabuf * wps_build_m2(struct wps_data *wps) 1652 { 1653 struct wpabuf *msg; 1654 1655 if (random_get_bytes(wps->nonce_r, WPS_NONCE_LEN) < 0) 1656 return NULL; 1657 wpa_hexdump(MSG_DEBUG, "WPS: Registrar Nonce", 1658 wps->nonce_r, WPS_NONCE_LEN); 1659 wpa_hexdump(MSG_DEBUG, "WPS: UUID-R", wps->uuid_r, WPS_UUID_LEN); 1660 1661 wpa_printf(MSG_DEBUG, "WPS: Building Message M2"); 1662 msg = wpabuf_alloc(1000); 1663 if (msg == NULL) 1664 return NULL; 1665 1666 if (wps_build_version(msg) || 1667 wps_build_msg_type(msg, WPS_M2) || 1668 wps_build_enrollee_nonce(wps, msg) || 1669 wps_build_registrar_nonce(wps, msg) || 1670 wps_build_uuid_r(wps, msg) || 1671 wps_build_public_key(wps, msg) || 1672 wps_derive_keys(wps) || 1673 wps_build_auth_type_flags(wps, msg) || 1674 wps_build_encr_type_flags(wps, msg) || 1675 wps_build_conn_type_flags(wps, msg) || 1676 wps_build_config_methods_r(wps->wps->registrar, msg) || 1677 wps_build_device_attrs(&wps->wps->dev, msg) || 1678 wps_build_rf_bands(&wps->wps->dev, msg) || 1679 wps_build_assoc_state(wps, msg) || 1680 wps_build_config_error(msg, WPS_CFG_NO_ERROR) || 1681 wps_build_dev_password_id(msg, wps->dev_pw_id) || 1682 wps_build_os_version(&wps->wps->dev, msg) || 1683 wps_build_wfa_ext(msg, 0, NULL, 0) || 1684 wps_build_authenticator(wps, msg)) { 1685 wpabuf_free(msg); 1686 return NULL; 1687 } 1688 1689 wps->int_reg = 1; 1690 wps->state = RECV_M3; 1691 return msg; 1692 } 1693 1694 1695 static struct wpabuf * wps_build_m2d(struct wps_data *wps) 1696 { 1697 struct wpabuf *msg; 1698 u16 err = wps->config_error; 1699 1700 wpa_printf(MSG_DEBUG, "WPS: Building Message M2D"); 1701 msg = wpabuf_alloc(1000); 1702 if (msg == NULL) 1703 return NULL; 1704 1705 if (wps->wps->ap && wps->wps->ap_setup_locked && 1706 err == WPS_CFG_NO_ERROR) 1707 err = WPS_CFG_SETUP_LOCKED; 1708 1709 if (wps_build_version(msg) || 1710 wps_build_msg_type(msg, WPS_M2D) || 1711 wps_build_enrollee_nonce(wps, msg) || 1712 wps_build_registrar_nonce(wps, msg) || 1713 wps_build_uuid_r(wps, msg) || 1714 wps_build_auth_type_flags(wps, msg) || 1715 wps_build_encr_type_flags(wps, msg) || 1716 wps_build_conn_type_flags(wps, msg) || 1717 wps_build_config_methods_r(wps->wps->registrar, msg) || 1718 wps_build_device_attrs(&wps->wps->dev, msg) || 1719 wps_build_rf_bands(&wps->wps->dev, msg) || 1720 wps_build_assoc_state(wps, msg) || 1721 wps_build_config_error(msg, err) || 1722 wps_build_os_version(&wps->wps->dev, msg) || 1723 wps_build_wfa_ext(msg, 0, NULL, 0)) { 1724 wpabuf_free(msg); 1725 return NULL; 1726 } 1727 1728 wps->state = RECV_M2D_ACK; 1729 return msg; 1730 } 1731 1732 1733 static struct wpabuf * wps_build_m4(struct wps_data *wps) 1734 { 1735 struct wpabuf *msg, *plain; 1736 1737 wpa_printf(MSG_DEBUG, "WPS: Building Message M4"); 1738 1739 wps_derive_psk(wps, wps->dev_password, wps->dev_password_len); 1740 1741 plain = wpabuf_alloc(200); 1742 if (plain == NULL) 1743 return NULL; 1744 1745 msg = wpabuf_alloc(1000); 1746 if (msg == NULL) { 1747 wpabuf_free(plain); 1748 return NULL; 1749 } 1750 1751 if (wps_build_version(msg) || 1752 wps_build_msg_type(msg, WPS_M4) || 1753 wps_build_enrollee_nonce(wps, msg) || 1754 wps_build_r_hash(wps, msg) || 1755 wps_build_r_snonce1(wps, plain) || 1756 wps_build_key_wrap_auth(wps, plain) || 1757 wps_build_encr_settings(wps, msg, plain) || 1758 wps_build_wfa_ext(msg, 0, NULL, 0) || 1759 wps_build_authenticator(wps, msg)) { 1760 wpabuf_free(plain); 1761 wpabuf_free(msg); 1762 return NULL; 1763 } 1764 wpabuf_free(plain); 1765 1766 wps->state = RECV_M5; 1767 return msg; 1768 } 1769 1770 1771 static struct wpabuf * wps_build_m6(struct wps_data *wps) 1772 { 1773 struct wpabuf *msg, *plain; 1774 1775 wpa_printf(MSG_DEBUG, "WPS: Building Message M6"); 1776 1777 plain = wpabuf_alloc(200); 1778 if (plain == NULL) 1779 return NULL; 1780 1781 msg = wpabuf_alloc(1000); 1782 if (msg == NULL) { 1783 wpabuf_free(plain); 1784 return NULL; 1785 } 1786 1787 if (wps_build_version(msg) || 1788 wps_build_msg_type(msg, WPS_M6) || 1789 wps_build_enrollee_nonce(wps, msg) || 1790 wps_build_r_snonce2(wps, plain) || 1791 wps_build_key_wrap_auth(wps, plain) || 1792 wps_build_encr_settings(wps, msg, plain) || 1793 wps_build_wfa_ext(msg, 0, NULL, 0) || 1794 wps_build_authenticator(wps, msg)) { 1795 wpabuf_free(plain); 1796 wpabuf_free(msg); 1797 return NULL; 1798 } 1799 wpabuf_free(plain); 1800 1801 wps->wps_pin_revealed = 1; 1802 wps->state = RECV_M7; 1803 return msg; 1804 } 1805 1806 1807 static struct wpabuf * wps_build_m8(struct wps_data *wps) 1808 { 1809 struct wpabuf *msg, *plain; 1810 1811 wpa_printf(MSG_DEBUG, "WPS: Building Message M8"); 1812 1813 plain = wpabuf_alloc(500); 1814 if (plain == NULL) 1815 return NULL; 1816 1817 msg = wpabuf_alloc(1000); 1818 if (msg == NULL) { 1819 wpabuf_free(plain); 1820 return NULL; 1821 } 1822 1823 if (wps_build_version(msg) || 1824 wps_build_msg_type(msg, WPS_M8) || 1825 wps_build_enrollee_nonce(wps, msg) || 1826 ((wps->wps->ap || wps->er) && wps_build_cred(wps, plain)) || 1827 (!wps->wps->ap && !wps->er && wps_build_ap_settings(wps, plain)) || 1828 wps_build_key_wrap_auth(wps, plain) || 1829 wps_build_encr_settings(wps, msg, plain) || 1830 wps_build_wfa_ext(msg, 0, NULL, 0) || 1831 wps_build_authenticator(wps, msg)) { 1832 wpabuf_free(plain); 1833 wpabuf_free(msg); 1834 return NULL; 1835 } 1836 wpabuf_free(plain); 1837 1838 wps->state = RECV_DONE; 1839 return msg; 1840 } 1841 1842 1843 struct wpabuf * wps_registrar_get_msg(struct wps_data *wps, 1844 enum wsc_op_code *op_code) 1845 { 1846 struct wpabuf *msg; 1847 1848 #ifdef CONFIG_WPS_UPNP 1849 if (!wps->int_reg && wps->wps->wps_upnp) { 1850 struct upnp_pending_message *p, *prev = NULL; 1851 if (wps->ext_reg > 1) 1852 wps_registrar_free_pending_m2(wps->wps); 1853 p = wps->wps->upnp_msgs; 1854 /* TODO: check pending message MAC address */ 1855 while (p && p->next) { 1856 prev = p; 1857 p = p->next; 1858 } 1859 if (p) { 1860 wpa_printf(MSG_DEBUG, "WPS: Use pending message from " 1861 "UPnP"); 1862 if (prev) 1863 prev->next = NULL; 1864 else 1865 wps->wps->upnp_msgs = NULL; 1866 msg = p->msg; 1867 switch (p->type) { 1868 case WPS_WSC_ACK: 1869 *op_code = WSC_ACK; 1870 break; 1871 case WPS_WSC_NACK: 1872 *op_code = WSC_NACK; 1873 break; 1874 default: 1875 *op_code = WSC_MSG; 1876 break; 1877 } 1878 os_free(p); 1879 if (wps->ext_reg == 0) 1880 wps->ext_reg = 1; 1881 return msg; 1882 } 1883 } 1884 if (wps->ext_reg) { 1885 wpa_printf(MSG_DEBUG, "WPS: Using external Registrar, but no " 1886 "pending message available"); 1887 return NULL; 1888 } 1889 #endif /* CONFIG_WPS_UPNP */ 1890 1891 switch (wps->state) { 1892 case SEND_M2: 1893 if (wps_get_dev_password(wps) < 0) 1894 msg = wps_build_m2d(wps); 1895 else 1896 msg = wps_build_m2(wps); 1897 *op_code = WSC_MSG; 1898 break; 1899 case SEND_M2D: 1900 msg = wps_build_m2d(wps); 1901 *op_code = WSC_MSG; 1902 break; 1903 case SEND_M4: 1904 msg = wps_build_m4(wps); 1905 *op_code = WSC_MSG; 1906 break; 1907 case SEND_M6: 1908 msg = wps_build_m6(wps); 1909 *op_code = WSC_MSG; 1910 break; 1911 case SEND_M8: 1912 msg = wps_build_m8(wps); 1913 *op_code = WSC_MSG; 1914 break; 1915 case RECV_DONE: 1916 msg = wps_build_wsc_ack(wps); 1917 *op_code = WSC_ACK; 1918 break; 1919 case SEND_WSC_NACK: 1920 msg = wps_build_wsc_nack(wps); 1921 *op_code = WSC_NACK; 1922 break; 1923 default: 1924 wpa_printf(MSG_DEBUG, "WPS: Unsupported state %d for building " 1925 "a message", wps->state); 1926 msg = NULL; 1927 break; 1928 } 1929 1930 if (*op_code == WSC_MSG && msg) { 1931 /* Save a copy of the last message for Authenticator derivation 1932 */ 1933 wpabuf_free(wps->last_msg); 1934 wps->last_msg = wpabuf_dup(msg); 1935 } 1936 1937 return msg; 1938 } 1939 1940 1941 static int wps_process_enrollee_nonce(struct wps_data *wps, const u8 *e_nonce) 1942 { 1943 if (e_nonce == NULL) { 1944 wpa_printf(MSG_DEBUG, "WPS: No Enrollee Nonce received"); 1945 return -1; 1946 } 1947 1948 os_memcpy(wps->nonce_e, e_nonce, WPS_NONCE_LEN); 1949 wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce", 1950 wps->nonce_e, WPS_NONCE_LEN); 1951 1952 return 0; 1953 } 1954 1955 1956 static int wps_process_registrar_nonce(struct wps_data *wps, const u8 *r_nonce) 1957 { 1958 if (r_nonce == NULL) { 1959 wpa_printf(MSG_DEBUG, "WPS: No Registrar Nonce received"); 1960 return -1; 1961 } 1962 1963 if (os_memcmp(wps->nonce_r, r_nonce, WPS_NONCE_LEN) != 0) { 1964 wpa_printf(MSG_DEBUG, "WPS: Invalid Registrar Nonce received"); 1965 return -1; 1966 } 1967 1968 return 0; 1969 } 1970 1971 1972 static int wps_process_uuid_e(struct wps_data *wps, const u8 *uuid_e) 1973 { 1974 if (uuid_e == NULL) { 1975 wpa_printf(MSG_DEBUG, "WPS: No UUID-E received"); 1976 return -1; 1977 } 1978 1979 os_memcpy(wps->uuid_e, uuid_e, WPS_UUID_LEN); 1980 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", wps->uuid_e, WPS_UUID_LEN); 1981 1982 return 0; 1983 } 1984 1985 1986 static int wps_process_dev_password_id(struct wps_data *wps, const u8 *pw_id) 1987 { 1988 if (pw_id == NULL) { 1989 wpa_printf(MSG_DEBUG, "WPS: No Device Password ID received"); 1990 return -1; 1991 } 1992 1993 wps->dev_pw_id = WPA_GET_BE16(pw_id); 1994 wpa_printf(MSG_DEBUG, "WPS: Device Password ID %d", wps->dev_pw_id); 1995 1996 return 0; 1997 } 1998 1999 2000 static int wps_process_e_hash1(struct wps_data *wps, const u8 *e_hash1) 2001 { 2002 if (e_hash1 == NULL) { 2003 wpa_printf(MSG_DEBUG, "WPS: No E-Hash1 received"); 2004 return -1; 2005 } 2006 2007 os_memcpy(wps->peer_hash1, e_hash1, WPS_HASH_LEN); 2008 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash1", wps->peer_hash1, WPS_HASH_LEN); 2009 2010 return 0; 2011 } 2012 2013 2014 static int wps_process_e_hash2(struct wps_data *wps, const u8 *e_hash2) 2015 { 2016 if (e_hash2 == NULL) { 2017 wpa_printf(MSG_DEBUG, "WPS: No E-Hash2 received"); 2018 return -1; 2019 } 2020 2021 os_memcpy(wps->peer_hash2, e_hash2, WPS_HASH_LEN); 2022 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash2", wps->peer_hash2, WPS_HASH_LEN); 2023 2024 return 0; 2025 } 2026 2027 2028 static int wps_process_e_snonce1(struct wps_data *wps, const u8 *e_snonce1) 2029 { 2030 u8 hash[SHA256_MAC_LEN]; 2031 const u8 *addr[4]; 2032 size_t len[4]; 2033 2034 if (e_snonce1 == NULL) { 2035 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce1 received"); 2036 return -1; 2037 } 2038 2039 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce1", e_snonce1, 2040 WPS_SECRET_NONCE_LEN); 2041 2042 /* E-Hash1 = HMAC_AuthKey(E-S1 || PSK1 || PK_E || PK_R) */ 2043 addr[0] = e_snonce1; 2044 len[0] = WPS_SECRET_NONCE_LEN; 2045 addr[1] = wps->psk1; 2046 len[1] = WPS_PSK_LEN; 2047 addr[2] = wpabuf_head(wps->dh_pubkey_e); 2048 len[2] = wpabuf_len(wps->dh_pubkey_e); 2049 addr[3] = wpabuf_head(wps->dh_pubkey_r); 2050 len[3] = wpabuf_len(wps->dh_pubkey_r); 2051 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 2052 2053 if (os_memcmp(wps->peer_hash1, hash, WPS_HASH_LEN) != 0) { 2054 wpa_printf(MSG_DEBUG, "WPS: E-Hash1 derived from E-S1 does " 2055 "not match with the pre-committed value"); 2056 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE; 2057 wps_pwd_auth_fail_event(wps->wps, 0, 1); 2058 return -1; 2059 } 2060 2061 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the first " 2062 "half of the device password"); 2063 2064 return 0; 2065 } 2066 2067 2068 static int wps_process_e_snonce2(struct wps_data *wps, const u8 *e_snonce2) 2069 { 2070 u8 hash[SHA256_MAC_LEN]; 2071 const u8 *addr[4]; 2072 size_t len[4]; 2073 2074 if (e_snonce2 == NULL) { 2075 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce2 received"); 2076 return -1; 2077 } 2078 2079 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce2", e_snonce2, 2080 WPS_SECRET_NONCE_LEN); 2081 2082 /* E-Hash2 = HMAC_AuthKey(E-S2 || PSK2 || PK_E || PK_R) */ 2083 addr[0] = e_snonce2; 2084 len[0] = WPS_SECRET_NONCE_LEN; 2085 addr[1] = wps->psk2; 2086 len[1] = WPS_PSK_LEN; 2087 addr[2] = wpabuf_head(wps->dh_pubkey_e); 2088 len[2] = wpabuf_len(wps->dh_pubkey_e); 2089 addr[3] = wpabuf_head(wps->dh_pubkey_r); 2090 len[3] = wpabuf_len(wps->dh_pubkey_r); 2091 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 2092 2093 if (os_memcmp(wps->peer_hash2, hash, WPS_HASH_LEN) != 0) { 2094 wpa_printf(MSG_DEBUG, "WPS: E-Hash2 derived from E-S2 does " 2095 "not match with the pre-committed value"); 2096 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e); 2097 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE; 2098 wps_pwd_auth_fail_event(wps->wps, 0, 2); 2099 return -1; 2100 } 2101 2102 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the second " 2103 "half of the device password"); 2104 wps->wps_pin_revealed = 0; 2105 wps_registrar_unlock_pin(wps->wps->registrar, wps->uuid_e); 2106 2107 /* 2108 * In case wildcard PIN is used and WPS handshake succeeds in the first 2109 * attempt, wps_registrar_unlock_pin() would not free the PIN, so make 2110 * sure the PIN gets invalidated here. 2111 */ 2112 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e); 2113 2114 return 0; 2115 } 2116 2117 2118 static int wps_process_mac_addr(struct wps_data *wps, const u8 *mac_addr) 2119 { 2120 if (mac_addr == NULL) { 2121 wpa_printf(MSG_DEBUG, "WPS: No MAC Address received"); 2122 return -1; 2123 } 2124 2125 wpa_printf(MSG_DEBUG, "WPS: Enrollee MAC Address " MACSTR, 2126 MAC2STR(mac_addr)); 2127 os_memcpy(wps->mac_addr_e, mac_addr, ETH_ALEN); 2128 os_memcpy(wps->peer_dev.mac_addr, mac_addr, ETH_ALEN); 2129 2130 return 0; 2131 } 2132 2133 2134 static int wps_process_pubkey(struct wps_data *wps, const u8 *pk, 2135 size_t pk_len) 2136 { 2137 if (pk == NULL || pk_len == 0) { 2138 wpa_printf(MSG_DEBUG, "WPS: No Public Key received"); 2139 return -1; 2140 } 2141 2142 #ifdef CONFIG_WPS_OOB 2143 if (wps->wps->oob_conf.pubkey_hash != NULL) { 2144 const u8 *addr[1]; 2145 u8 hash[WPS_HASH_LEN]; 2146 2147 addr[0] = pk; 2148 sha256_vector(1, addr, &pk_len, hash); 2149 if (os_memcmp(hash, 2150 wpabuf_head(wps->wps->oob_conf.pubkey_hash), 2151 WPS_OOB_PUBKEY_HASH_LEN) != 0) { 2152 wpa_printf(MSG_ERROR, "WPS: Public Key hash error"); 2153 return -1; 2154 } 2155 } 2156 #endif /* CONFIG_WPS_OOB */ 2157 2158 wpabuf_free(wps->dh_pubkey_e); 2159 wps->dh_pubkey_e = wpabuf_alloc_copy(pk, pk_len); 2160 if (wps->dh_pubkey_e == NULL) 2161 return -1; 2162 2163 return 0; 2164 } 2165 2166 2167 static int wps_process_auth_type_flags(struct wps_data *wps, const u8 *auth) 2168 { 2169 u16 auth_types; 2170 2171 if (auth == NULL) { 2172 wpa_printf(MSG_DEBUG, "WPS: No Authentication Type flags " 2173 "received"); 2174 return -1; 2175 } 2176 2177 auth_types = WPA_GET_BE16(auth); 2178 2179 wpa_printf(MSG_DEBUG, "WPS: Enrollee Authentication Type flags 0x%x", 2180 auth_types); 2181 wps->auth_type = wps->wps->auth_types & auth_types; 2182 if (wps->auth_type == 0) { 2183 wpa_printf(MSG_DEBUG, "WPS: No match in supported " 2184 "authentication types (own 0x%x Enrollee 0x%x)", 2185 wps->wps->auth_types, auth_types); 2186 #ifdef WPS_WORKAROUNDS 2187 /* 2188 * Some deployed implementations seem to advertise incorrect 2189 * information in this attribute. For example, Linksys WRT350N 2190 * seems to have a byteorder bug that breaks this negotiation. 2191 * In order to interoperate with existing implementations, 2192 * assume that the Enrollee supports everything we do. 2193 */ 2194 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee " 2195 "does not advertise supported authentication types " 2196 "correctly"); 2197 wps->auth_type = wps->wps->auth_types; 2198 #else /* WPS_WORKAROUNDS */ 2199 return -1; 2200 #endif /* WPS_WORKAROUNDS */ 2201 } 2202 2203 return 0; 2204 } 2205 2206 2207 static int wps_process_encr_type_flags(struct wps_data *wps, const u8 *encr) 2208 { 2209 u16 encr_types; 2210 2211 if (encr == NULL) { 2212 wpa_printf(MSG_DEBUG, "WPS: No Encryption Type flags " 2213 "received"); 2214 return -1; 2215 } 2216 2217 encr_types = WPA_GET_BE16(encr); 2218 2219 wpa_printf(MSG_DEBUG, "WPS: Enrollee Encryption Type flags 0x%x", 2220 encr_types); 2221 wps->encr_type = wps->wps->encr_types & encr_types; 2222 if (wps->encr_type == 0) { 2223 wpa_printf(MSG_DEBUG, "WPS: No match in supported " 2224 "encryption types (own 0x%x Enrollee 0x%x)", 2225 wps->wps->encr_types, encr_types); 2226 #ifdef WPS_WORKAROUNDS 2227 /* 2228 * Some deployed implementations seem to advertise incorrect 2229 * information in this attribute. For example, Linksys WRT350N 2230 * seems to have a byteorder bug that breaks this negotiation. 2231 * In order to interoperate with existing implementations, 2232 * assume that the Enrollee supports everything we do. 2233 */ 2234 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee " 2235 "does not advertise supported encryption types " 2236 "correctly"); 2237 wps->encr_type = wps->wps->encr_types; 2238 #else /* WPS_WORKAROUNDS */ 2239 return -1; 2240 #endif /* WPS_WORKAROUNDS */ 2241 } 2242 2243 return 0; 2244 } 2245 2246 2247 static int wps_process_conn_type_flags(struct wps_data *wps, const u8 *conn) 2248 { 2249 if (conn == NULL) { 2250 wpa_printf(MSG_DEBUG, "WPS: No Connection Type flags " 2251 "received"); 2252 return -1; 2253 } 2254 2255 wpa_printf(MSG_DEBUG, "WPS: Enrollee Connection Type flags 0x%x", 2256 *conn); 2257 2258 return 0; 2259 } 2260 2261 2262 static int wps_process_config_methods(struct wps_data *wps, const u8 *methods) 2263 { 2264 u16 m; 2265 2266 if (methods == NULL) { 2267 wpa_printf(MSG_DEBUG, "WPS: No Config Methods received"); 2268 return -1; 2269 } 2270 2271 m = WPA_GET_BE16(methods); 2272 2273 wpa_printf(MSG_DEBUG, "WPS: Enrollee Config Methods 0x%x" 2274 "%s%s%s%s%s%s%s%s%s", m, 2275 m & WPS_CONFIG_USBA ? " [USBA]" : "", 2276 m & WPS_CONFIG_ETHERNET ? " [Ethernet]" : "", 2277 m & WPS_CONFIG_LABEL ? " [Label]" : "", 2278 m & WPS_CONFIG_DISPLAY ? " [Display]" : "", 2279 m & WPS_CONFIG_EXT_NFC_TOKEN ? " [Ext NFC Token]" : "", 2280 m & WPS_CONFIG_INT_NFC_TOKEN ? " [Int NFC Token]" : "", 2281 m & WPS_CONFIG_NFC_INTERFACE ? " [NFC]" : "", 2282 m & WPS_CONFIG_PUSHBUTTON ? " [PBC]" : "", 2283 m & WPS_CONFIG_KEYPAD ? " [Keypad]" : ""); 2284 2285 if (!(m & WPS_CONFIG_DISPLAY) && !wps->use_psk_key) { 2286 /* 2287 * The Enrollee does not have a display so it is unlikely to be 2288 * able to show the passphrase to a user and as such, could 2289 * benefit from receiving PSK to reduce key derivation time. 2290 */ 2291 wpa_printf(MSG_DEBUG, "WPS: Prefer PSK format key due to " 2292 "Enrollee not supporting display"); 2293 wps->use_psk_key = 1; 2294 } 2295 2296 return 0; 2297 } 2298 2299 2300 static int wps_process_wps_state(struct wps_data *wps, const u8 *state) 2301 { 2302 if (state == NULL) { 2303 wpa_printf(MSG_DEBUG, "WPS: No Wi-Fi Protected Setup State " 2304 "received"); 2305 return -1; 2306 } 2307 2308 wpa_printf(MSG_DEBUG, "WPS: Enrollee Wi-Fi Protected Setup State %d", 2309 *state); 2310 2311 return 0; 2312 } 2313 2314 2315 static int wps_process_assoc_state(struct wps_data *wps, const u8 *assoc) 2316 { 2317 u16 a; 2318 2319 if (assoc == NULL) { 2320 wpa_printf(MSG_DEBUG, "WPS: No Association State received"); 2321 return -1; 2322 } 2323 2324 a = WPA_GET_BE16(assoc); 2325 wpa_printf(MSG_DEBUG, "WPS: Enrollee Association State %d", a); 2326 2327 return 0; 2328 } 2329 2330 2331 static int wps_process_config_error(struct wps_data *wps, const u8 *err) 2332 { 2333 u16 e; 2334 2335 if (err == NULL) { 2336 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error received"); 2337 return -1; 2338 } 2339 2340 e = WPA_GET_BE16(err); 2341 wpa_printf(MSG_DEBUG, "WPS: Enrollee Configuration Error %d", e); 2342 2343 return 0; 2344 } 2345 2346 2347 static int wps_registrar_p2p_dev_addr_match(struct wps_data *wps) 2348 { 2349 #ifdef CONFIG_P2P 2350 struct wps_registrar *reg = wps->wps->registrar; 2351 2352 if (is_zero_ether_addr(reg->p2p_dev_addr)) 2353 return 1; /* no filtering in use */ 2354 2355 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) != 0) { 2356 wpa_printf(MSG_DEBUG, "WPS: No match on P2P Device Address " 2357 "filtering for PBC: expected " MACSTR " was " 2358 MACSTR " - indicate PBC session overlap", 2359 MAC2STR(reg->p2p_dev_addr), 2360 MAC2STR(wps->p2p_dev_addr)); 2361 return 0; 2362 } 2363 #endif /* CONFIG_P2P */ 2364 return 1; 2365 } 2366 2367 2368 static int wps_registrar_skip_overlap(struct wps_data *wps) 2369 { 2370 #ifdef CONFIG_P2P 2371 struct wps_registrar *reg = wps->wps->registrar; 2372 2373 if (is_zero_ether_addr(reg->p2p_dev_addr)) 2374 return 0; /* no specific Enrollee selected */ 2375 2376 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) == 0) { 2377 wpa_printf(MSG_DEBUG, "WPS: Skip PBC overlap due to selected " 2378 "Enrollee match"); 2379 return 1; 2380 } 2381 #endif /* CONFIG_P2P */ 2382 return 0; 2383 } 2384 2385 2386 static enum wps_process_res wps_process_m1(struct wps_data *wps, 2387 struct wps_parse_attr *attr) 2388 { 2389 wpa_printf(MSG_DEBUG, "WPS: Received M1"); 2390 2391 if (wps->state != RECV_M1) { 2392 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2393 "receiving M1", wps->state); 2394 return WPS_FAILURE; 2395 } 2396 2397 if (wps_process_uuid_e(wps, attr->uuid_e) || 2398 wps_process_mac_addr(wps, attr->mac_addr) || 2399 wps_process_enrollee_nonce(wps, attr->enrollee_nonce) || 2400 wps_process_pubkey(wps, attr->public_key, attr->public_key_len) || 2401 wps_process_auth_type_flags(wps, attr->auth_type_flags) || 2402 wps_process_encr_type_flags(wps, attr->encr_type_flags) || 2403 wps_process_conn_type_flags(wps, attr->conn_type_flags) || 2404 wps_process_config_methods(wps, attr->config_methods) || 2405 wps_process_wps_state(wps, attr->wps_state) || 2406 wps_process_device_attrs(&wps->peer_dev, attr) || 2407 wps_process_rf_bands(&wps->peer_dev, attr->rf_bands) || 2408 wps_process_assoc_state(wps, attr->assoc_state) || 2409 wps_process_dev_password_id(wps, attr->dev_password_id) || 2410 wps_process_config_error(wps, attr->config_error) || 2411 wps_process_os_version(&wps->peer_dev, attr->os_version)) 2412 return WPS_FAILURE; 2413 2414 if (wps->dev_pw_id < 0x10 && 2415 wps->dev_pw_id != DEV_PW_DEFAULT && 2416 wps->dev_pw_id != DEV_PW_USER_SPECIFIED && 2417 wps->dev_pw_id != DEV_PW_MACHINE_SPECIFIED && 2418 wps->dev_pw_id != DEV_PW_REGISTRAR_SPECIFIED && 2419 (wps->dev_pw_id != DEV_PW_PUSHBUTTON || 2420 !wps->wps->registrar->pbc)) { 2421 wpa_printf(MSG_DEBUG, "WPS: Unsupported Device Password ID %d", 2422 wps->dev_pw_id); 2423 wps->state = SEND_M2D; 2424 return WPS_CONTINUE; 2425 } 2426 2427 #ifdef CONFIG_WPS_OOB 2428 if (wps->dev_pw_id >= 0x10 && 2429 wps->dev_pw_id != wps->wps->oob_dev_pw_id) { 2430 wpa_printf(MSG_DEBUG, "WPS: OOB Device Password ID " 2431 "%d mismatch", wps->dev_pw_id); 2432 wps->state = SEND_M2D; 2433 return WPS_CONTINUE; 2434 } 2435 #endif /* CONFIG_WPS_OOB */ 2436 2437 if (wps->dev_pw_id == DEV_PW_PUSHBUTTON) { 2438 if ((wps->wps->registrar->force_pbc_overlap || 2439 wps_registrar_pbc_overlap(wps->wps->registrar, 2440 wps->mac_addr_e, wps->uuid_e) || 2441 !wps_registrar_p2p_dev_addr_match(wps)) && 2442 !wps_registrar_skip_overlap(wps)) { 2443 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - deny PBC " 2444 "negotiation"); 2445 wps->state = SEND_M2D; 2446 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2447 wps_pbc_overlap_event(wps->wps); 2448 wps_fail_event(wps->wps, WPS_M1, 2449 WPS_CFG_MULTIPLE_PBC_DETECTED, 2450 WPS_EI_NO_ERROR); 2451 wps->wps->registrar->force_pbc_overlap = 1; 2452 return WPS_CONTINUE; 2453 } 2454 wps_registrar_add_pbc_session(wps->wps->registrar, 2455 wps->mac_addr_e, wps->uuid_e); 2456 wps->pbc = 1; 2457 } 2458 2459 #ifdef WPS_WORKAROUNDS 2460 /* 2461 * It looks like Mac OS X 10.6.3 and 10.6.4 do not like Network Key in 2462 * passphrase format. To avoid interop issues, force PSK format to be 2463 * used. 2464 */ 2465 if (!wps->use_psk_key && 2466 wps->peer_dev.manufacturer && 2467 os_strncmp(wps->peer_dev.manufacturer, "Apple ", 6) == 0 && 2468 wps->peer_dev.model_name && 2469 os_strcmp(wps->peer_dev.model_name, "AirPort") == 0) { 2470 wpa_printf(MSG_DEBUG, "WPS: Workaround - Force Network Key in " 2471 "PSK format"); 2472 wps->use_psk_key = 1; 2473 } 2474 #endif /* WPS_WORKAROUNDS */ 2475 2476 wps->state = SEND_M2; 2477 return WPS_CONTINUE; 2478 } 2479 2480 2481 static enum wps_process_res wps_process_m3(struct wps_data *wps, 2482 const struct wpabuf *msg, 2483 struct wps_parse_attr *attr) 2484 { 2485 wpa_printf(MSG_DEBUG, "WPS: Received M3"); 2486 2487 if (wps->state != RECV_M3) { 2488 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2489 "receiving M3", wps->state); 2490 wps->state = SEND_WSC_NACK; 2491 return WPS_CONTINUE; 2492 } 2493 2494 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2495 !wps_registrar_skip_overlap(wps)) { 2496 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2497 "session overlap"); 2498 wps->state = SEND_WSC_NACK; 2499 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2500 return WPS_CONTINUE; 2501 } 2502 2503 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2504 wps_process_authenticator(wps, attr->authenticator, msg) || 2505 wps_process_e_hash1(wps, attr->e_hash1) || 2506 wps_process_e_hash2(wps, attr->e_hash2)) { 2507 wps->state = SEND_WSC_NACK; 2508 return WPS_CONTINUE; 2509 } 2510 2511 wps->state = SEND_M4; 2512 return WPS_CONTINUE; 2513 } 2514 2515 2516 static enum wps_process_res wps_process_m5(struct wps_data *wps, 2517 const struct wpabuf *msg, 2518 struct wps_parse_attr *attr) 2519 { 2520 struct wpabuf *decrypted; 2521 struct wps_parse_attr eattr; 2522 2523 wpa_printf(MSG_DEBUG, "WPS: Received M5"); 2524 2525 if (wps->state != RECV_M5) { 2526 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2527 "receiving M5", wps->state); 2528 wps->state = SEND_WSC_NACK; 2529 return WPS_CONTINUE; 2530 } 2531 2532 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2533 !wps_registrar_skip_overlap(wps)) { 2534 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2535 "session overlap"); 2536 wps->state = SEND_WSC_NACK; 2537 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2538 return WPS_CONTINUE; 2539 } 2540 2541 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2542 wps_process_authenticator(wps, attr->authenticator, msg)) { 2543 wps->state = SEND_WSC_NACK; 2544 return WPS_CONTINUE; 2545 } 2546 2547 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings, 2548 attr->encr_settings_len); 2549 if (decrypted == NULL) { 2550 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted " 2551 "Settings attribute"); 2552 wps->state = SEND_WSC_NACK; 2553 return WPS_CONTINUE; 2554 } 2555 2556 if (wps_validate_m5_encr(decrypted, attr->version2 != NULL) < 0) { 2557 wpabuf_free(decrypted); 2558 wps->state = SEND_WSC_NACK; 2559 return WPS_CONTINUE; 2560 } 2561 2562 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings " 2563 "attribute"); 2564 if (wps_parse_msg(decrypted, &eattr) < 0 || 2565 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) || 2566 wps_process_e_snonce1(wps, eattr.e_snonce1)) { 2567 wpabuf_free(decrypted); 2568 wps->state = SEND_WSC_NACK; 2569 return WPS_CONTINUE; 2570 } 2571 wpabuf_free(decrypted); 2572 2573 wps->state = SEND_M6; 2574 return WPS_CONTINUE; 2575 } 2576 2577 2578 static void wps_sta_cred_cb(struct wps_data *wps) 2579 { 2580 /* 2581 * Update credential to only include a single authentication and 2582 * encryption type in case the AP configuration includes more than one 2583 * option. 2584 */ 2585 if (wps->cred.auth_type & WPS_AUTH_WPA2PSK) 2586 wps->cred.auth_type = WPS_AUTH_WPA2PSK; 2587 else if (wps->cred.auth_type & WPS_AUTH_WPAPSK) 2588 wps->cred.auth_type = WPS_AUTH_WPAPSK; 2589 if (wps->cred.encr_type & WPS_ENCR_AES) 2590 wps->cred.encr_type = WPS_ENCR_AES; 2591 else if (wps->cred.encr_type & WPS_ENCR_TKIP) 2592 wps->cred.encr_type = WPS_ENCR_TKIP; 2593 wpa_printf(MSG_DEBUG, "WPS: Update local configuration based on the " 2594 "AP configuration"); 2595 if (wps->wps->cred_cb) 2596 wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred); 2597 } 2598 2599 2600 static void wps_cred_update(struct wps_credential *dst, 2601 struct wps_credential *src) 2602 { 2603 os_memcpy(dst->ssid, src->ssid, sizeof(dst->ssid)); 2604 dst->ssid_len = src->ssid_len; 2605 dst->auth_type = src->auth_type; 2606 dst->encr_type = src->encr_type; 2607 dst->key_idx = src->key_idx; 2608 os_memcpy(dst->key, src->key, sizeof(dst->key)); 2609 dst->key_len = src->key_len; 2610 } 2611 2612 2613 static int wps_process_ap_settings_r(struct wps_data *wps, 2614 struct wps_parse_attr *attr) 2615 { 2616 struct wpabuf *msg; 2617 2618 if (wps->wps->ap || wps->er) 2619 return 0; 2620 2621 /* AP Settings Attributes in M7 when Enrollee is an AP */ 2622 if (wps_process_ap_settings(attr, &wps->cred) < 0) 2623 return -1; 2624 2625 wpa_printf(MSG_INFO, "WPS: Received old AP configuration from AP"); 2626 2627 if (wps->new_ap_settings) { 2628 wpa_printf(MSG_INFO, "WPS: Update AP configuration based on " 2629 "new settings"); 2630 wps_cred_update(&wps->cred, wps->new_ap_settings); 2631 return 0; 2632 } else { 2633 /* 2634 * Use the AP PIN only to receive the current AP settings, not 2635 * to reconfigure the AP. 2636 */ 2637 2638 /* 2639 * Clear selected registrar here since we do not get to 2640 * WSC_Done in this protocol run. 2641 */ 2642 wps_registrar_pin_completed(wps->wps->registrar); 2643 2644 msg = wps_build_ap_cred(wps); 2645 if (msg == NULL) 2646 return -1; 2647 wps->cred.cred_attr = wpabuf_head(msg); 2648 wps->cred.cred_attr_len = wpabuf_len(msg); 2649 2650 if (wps->ap_settings_cb) { 2651 wps->ap_settings_cb(wps->ap_settings_cb_ctx, 2652 &wps->cred); 2653 wpabuf_free(msg); 2654 return 1; 2655 } 2656 wps_sta_cred_cb(wps); 2657 2658 wps->cred.cred_attr = NULL; 2659 wps->cred.cred_attr_len = 0; 2660 wpabuf_free(msg); 2661 2662 return 1; 2663 } 2664 } 2665 2666 2667 static enum wps_process_res wps_process_m7(struct wps_data *wps, 2668 const struct wpabuf *msg, 2669 struct wps_parse_attr *attr) 2670 { 2671 struct wpabuf *decrypted; 2672 struct wps_parse_attr eattr; 2673 2674 wpa_printf(MSG_DEBUG, "WPS: Received M7"); 2675 2676 if (wps->state != RECV_M7) { 2677 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2678 "receiving M7", wps->state); 2679 wps->state = SEND_WSC_NACK; 2680 return WPS_CONTINUE; 2681 } 2682 2683 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2684 !wps_registrar_skip_overlap(wps)) { 2685 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2686 "session overlap"); 2687 wps->state = SEND_WSC_NACK; 2688 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2689 return WPS_CONTINUE; 2690 } 2691 2692 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2693 wps_process_authenticator(wps, attr->authenticator, msg)) { 2694 wps->state = SEND_WSC_NACK; 2695 return WPS_CONTINUE; 2696 } 2697 2698 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings, 2699 attr->encr_settings_len); 2700 if (decrypted == NULL) { 2701 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypt Encrypted " 2702 "Settings attribute"); 2703 wps->state = SEND_WSC_NACK; 2704 return WPS_CONTINUE; 2705 } 2706 2707 if (wps_validate_m7_encr(decrypted, wps->wps->ap || wps->er, 2708 attr->version2 != NULL) < 0) { 2709 wpabuf_free(decrypted); 2710 wps->state = SEND_WSC_NACK; 2711 return WPS_CONTINUE; 2712 } 2713 2714 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings " 2715 "attribute"); 2716 if (wps_parse_msg(decrypted, &eattr) < 0 || 2717 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) || 2718 wps_process_e_snonce2(wps, eattr.e_snonce2) || 2719 wps_process_ap_settings_r(wps, &eattr)) { 2720 wpabuf_free(decrypted); 2721 wps->state = SEND_WSC_NACK; 2722 return WPS_CONTINUE; 2723 } 2724 2725 wpabuf_free(decrypted); 2726 2727 wps->state = SEND_M8; 2728 return WPS_CONTINUE; 2729 } 2730 2731 2732 static enum wps_process_res wps_process_wsc_msg(struct wps_data *wps, 2733 const struct wpabuf *msg) 2734 { 2735 struct wps_parse_attr attr; 2736 enum wps_process_res ret = WPS_CONTINUE; 2737 2738 wpa_printf(MSG_DEBUG, "WPS: Received WSC_MSG"); 2739 2740 if (wps_parse_msg(msg, &attr) < 0) 2741 return WPS_FAILURE; 2742 2743 if (attr.msg_type == NULL) { 2744 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 2745 wps->state = SEND_WSC_NACK; 2746 return WPS_CONTINUE; 2747 } 2748 2749 if (*attr.msg_type != WPS_M1 && 2750 (attr.registrar_nonce == NULL || 2751 os_memcmp(wps->nonce_r, attr.registrar_nonce, 2752 WPS_NONCE_LEN != 0))) { 2753 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 2754 return WPS_FAILURE; 2755 } 2756 2757 switch (*attr.msg_type) { 2758 case WPS_M1: 2759 if (wps_validate_m1(msg) < 0) 2760 return WPS_FAILURE; 2761 #ifdef CONFIG_WPS_UPNP 2762 if (wps->wps->wps_upnp && attr.mac_addr) { 2763 /* Remove old pending messages when starting new run */ 2764 wps_free_pending_msgs(wps->wps->upnp_msgs); 2765 wps->wps->upnp_msgs = NULL; 2766 2767 upnp_wps_device_send_wlan_event( 2768 wps->wps->wps_upnp, attr.mac_addr, 2769 UPNP_WPS_WLANEVENT_TYPE_EAP, msg); 2770 } 2771 #endif /* CONFIG_WPS_UPNP */ 2772 ret = wps_process_m1(wps, &attr); 2773 break; 2774 case WPS_M3: 2775 if (wps_validate_m3(msg) < 0) 2776 return WPS_FAILURE; 2777 ret = wps_process_m3(wps, msg, &attr); 2778 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 2779 wps_fail_event(wps->wps, WPS_M3, wps->config_error, 2780 wps->error_indication); 2781 break; 2782 case WPS_M5: 2783 if (wps_validate_m5(msg) < 0) 2784 return WPS_FAILURE; 2785 ret = wps_process_m5(wps, msg, &attr); 2786 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 2787 wps_fail_event(wps->wps, WPS_M5, wps->config_error, 2788 wps->error_indication); 2789 break; 2790 case WPS_M7: 2791 if (wps_validate_m7(msg) < 0) 2792 return WPS_FAILURE; 2793 ret = wps_process_m7(wps, msg, &attr); 2794 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 2795 wps_fail_event(wps->wps, WPS_M7, wps->config_error, 2796 wps->error_indication); 2797 break; 2798 default: 2799 wpa_printf(MSG_DEBUG, "WPS: Unsupported Message Type %d", 2800 *attr.msg_type); 2801 return WPS_FAILURE; 2802 } 2803 2804 if (ret == WPS_CONTINUE) { 2805 /* Save a copy of the last message for Authenticator derivation 2806 */ 2807 wpabuf_free(wps->last_msg); 2808 wps->last_msg = wpabuf_dup(msg); 2809 } 2810 2811 return ret; 2812 } 2813 2814 2815 static enum wps_process_res wps_process_wsc_ack(struct wps_data *wps, 2816 const struct wpabuf *msg) 2817 { 2818 struct wps_parse_attr attr; 2819 2820 wpa_printf(MSG_DEBUG, "WPS: Received WSC_ACK"); 2821 2822 if (wps_parse_msg(msg, &attr) < 0) 2823 return WPS_FAILURE; 2824 2825 if (attr.msg_type == NULL) { 2826 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 2827 return WPS_FAILURE; 2828 } 2829 2830 if (*attr.msg_type != WPS_WSC_ACK) { 2831 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 2832 *attr.msg_type); 2833 return WPS_FAILURE; 2834 } 2835 2836 #ifdef CONFIG_WPS_UPNP 2837 if (wps->wps->wps_upnp && wps->ext_reg && wps->state == RECV_M2D_ACK && 2838 upnp_wps_subscribers(wps->wps->wps_upnp)) { 2839 if (wps->wps->upnp_msgs) 2840 return WPS_CONTINUE; 2841 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an " 2842 "external Registrar"); 2843 return WPS_PENDING; 2844 } 2845 #endif /* CONFIG_WPS_UPNP */ 2846 2847 if (attr.registrar_nonce == NULL || 2848 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN != 0)) 2849 { 2850 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 2851 return WPS_FAILURE; 2852 } 2853 2854 if (attr.enrollee_nonce == NULL || 2855 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) { 2856 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 2857 return WPS_FAILURE; 2858 } 2859 2860 if (wps->state == RECV_M2D_ACK) { 2861 #ifdef CONFIG_WPS_UPNP 2862 if (wps->wps->wps_upnp && 2863 upnp_wps_subscribers(wps->wps->wps_upnp)) { 2864 if (wps->wps->upnp_msgs) 2865 return WPS_CONTINUE; 2866 if (wps->ext_reg == 0) 2867 wps->ext_reg = 1; 2868 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an " 2869 "external Registrar"); 2870 return WPS_PENDING; 2871 } 2872 #endif /* CONFIG_WPS_UPNP */ 2873 2874 wpa_printf(MSG_DEBUG, "WPS: No more registrars available - " 2875 "terminate negotiation"); 2876 } 2877 2878 return WPS_FAILURE; 2879 } 2880 2881 2882 static enum wps_process_res wps_process_wsc_nack(struct wps_data *wps, 2883 const struct wpabuf *msg) 2884 { 2885 struct wps_parse_attr attr; 2886 int old_state; 2887 u16 config_error; 2888 2889 wpa_printf(MSG_DEBUG, "WPS: Received WSC_NACK"); 2890 2891 old_state = wps->state; 2892 wps->state = SEND_WSC_NACK; 2893 2894 if (wps_parse_msg(msg, &attr) < 0) 2895 return WPS_FAILURE; 2896 2897 if (attr.msg_type == NULL) { 2898 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 2899 return WPS_FAILURE; 2900 } 2901 2902 if (*attr.msg_type != WPS_WSC_NACK) { 2903 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 2904 *attr.msg_type); 2905 return WPS_FAILURE; 2906 } 2907 2908 #ifdef CONFIG_WPS_UPNP 2909 if (wps->wps->wps_upnp && wps->ext_reg) { 2910 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external " 2911 "Registrar terminated by the Enrollee"); 2912 return WPS_FAILURE; 2913 } 2914 #endif /* CONFIG_WPS_UPNP */ 2915 2916 if (attr.registrar_nonce == NULL || 2917 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN != 0)) 2918 { 2919 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 2920 return WPS_FAILURE; 2921 } 2922 2923 if (attr.enrollee_nonce == NULL || 2924 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) { 2925 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 2926 return WPS_FAILURE; 2927 } 2928 2929 if (attr.config_error == NULL) { 2930 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error attribute " 2931 "in WSC_NACK"); 2932 return WPS_FAILURE; 2933 } 2934 2935 config_error = WPA_GET_BE16(attr.config_error); 2936 wpa_printf(MSG_DEBUG, "WPS: Enrollee terminated negotiation with " 2937 "Configuration Error %d", config_error); 2938 2939 switch (old_state) { 2940 case RECV_M3: 2941 wps_fail_event(wps->wps, WPS_M2, config_error, 2942 wps->error_indication); 2943 break; 2944 case RECV_M5: 2945 wps_fail_event(wps->wps, WPS_M4, config_error, 2946 wps->error_indication); 2947 break; 2948 case RECV_M7: 2949 wps_fail_event(wps->wps, WPS_M6, config_error, 2950 wps->error_indication); 2951 break; 2952 case RECV_DONE: 2953 wps_fail_event(wps->wps, WPS_M8, config_error, 2954 wps->error_indication); 2955 break; 2956 default: 2957 break; 2958 } 2959 2960 return WPS_FAILURE; 2961 } 2962 2963 2964 static enum wps_process_res wps_process_wsc_done(struct wps_data *wps, 2965 const struct wpabuf *msg) 2966 { 2967 struct wps_parse_attr attr; 2968 2969 wpa_printf(MSG_DEBUG, "WPS: Received WSC_Done"); 2970 2971 if (wps->state != RECV_DONE && 2972 (!wps->wps->wps_upnp || !wps->ext_reg)) { 2973 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2974 "receiving WSC_Done", wps->state); 2975 return WPS_FAILURE; 2976 } 2977 2978 if (wps_parse_msg(msg, &attr) < 0) 2979 return WPS_FAILURE; 2980 2981 if (attr.msg_type == NULL) { 2982 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 2983 return WPS_FAILURE; 2984 } 2985 2986 if (*attr.msg_type != WPS_WSC_DONE) { 2987 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 2988 *attr.msg_type); 2989 return WPS_FAILURE; 2990 } 2991 2992 #ifdef CONFIG_WPS_UPNP 2993 if (wps->wps->wps_upnp && wps->ext_reg) { 2994 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external " 2995 "Registrar completed successfully"); 2996 wps_device_store(wps->wps->registrar, &wps->peer_dev, 2997 wps->uuid_e); 2998 return WPS_DONE; 2999 } 3000 #endif /* CONFIG_WPS_UPNP */ 3001 3002 if (attr.registrar_nonce == NULL || 3003 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN != 0)) 3004 { 3005 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3006 return WPS_FAILURE; 3007 } 3008 3009 if (attr.enrollee_nonce == NULL || 3010 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN != 0)) { 3011 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 3012 return WPS_FAILURE; 3013 } 3014 3015 wpa_printf(MSG_DEBUG, "WPS: Negotiation completed successfully"); 3016 wps_device_store(wps->wps->registrar, &wps->peer_dev, 3017 wps->uuid_e); 3018 3019 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->new_psk && 3020 wps->wps->ap && !wps->wps->registrar->disable_auto_conf) { 3021 struct wps_credential cred; 3022 3023 wpa_printf(MSG_DEBUG, "WPS: Moving to Configured state based " 3024 "on first Enrollee connection"); 3025 3026 os_memset(&cred, 0, sizeof(cred)); 3027 os_memcpy(cred.ssid, wps->wps->ssid, wps->wps->ssid_len); 3028 cred.ssid_len = wps->wps->ssid_len; 3029 cred.auth_type = WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK; 3030 cred.encr_type = WPS_ENCR_TKIP | WPS_ENCR_AES; 3031 os_memcpy(cred.key, wps->new_psk, wps->new_psk_len); 3032 cred.key_len = wps->new_psk_len; 3033 3034 wps->wps->wps_state = WPS_STATE_CONFIGURED; 3035 wpa_hexdump_ascii_key(MSG_DEBUG, 3036 "WPS: Generated random passphrase", 3037 wps->new_psk, wps->new_psk_len); 3038 if (wps->wps->cred_cb) 3039 wps->wps->cred_cb(wps->wps->cb_ctx, &cred); 3040 3041 os_free(wps->new_psk); 3042 wps->new_psk = NULL; 3043 } 3044 3045 if (!wps->wps->ap && !wps->er) 3046 wps_sta_cred_cb(wps); 3047 3048 if (wps->new_psk) { 3049 if (wps_cb_new_psk(wps->wps->registrar, wps->mac_addr_e, 3050 wps->new_psk, wps->new_psk_len)) { 3051 wpa_printf(MSG_DEBUG, "WPS: Failed to configure the " 3052 "new PSK"); 3053 } 3054 os_free(wps->new_psk); 3055 wps->new_psk = NULL; 3056 } 3057 3058 wps_cb_reg_success(wps->wps->registrar, wps->mac_addr_e, wps->uuid_e); 3059 3060 if (wps->pbc) { 3061 wps_registrar_remove_pbc_session(wps->wps->registrar, 3062 wps->uuid_e, 3063 wps->p2p_dev_addr); 3064 wps_registrar_pbc_completed(wps->wps->registrar); 3065 } else { 3066 wps_registrar_pin_completed(wps->wps->registrar); 3067 } 3068 /* TODO: maintain AuthorizedMACs somewhere separately for each ER and 3069 * merge them into APs own list.. */ 3070 3071 wps_success_event(wps->wps); 3072 3073 return WPS_DONE; 3074 } 3075 3076 3077 enum wps_process_res wps_registrar_process_msg(struct wps_data *wps, 3078 enum wsc_op_code op_code, 3079 const struct wpabuf *msg) 3080 { 3081 enum wps_process_res ret; 3082 3083 wpa_printf(MSG_DEBUG, "WPS: Processing received message (len=%lu " 3084 "op_code=%d)", 3085 (unsigned long) wpabuf_len(msg), op_code); 3086 3087 #ifdef CONFIG_WPS_UPNP 3088 if (wps->wps->wps_upnp && op_code == WSC_MSG && wps->ext_reg == 1) { 3089 struct wps_parse_attr attr; 3090 if (wps_parse_msg(msg, &attr) == 0 && attr.msg_type && 3091 *attr.msg_type == WPS_M3) 3092 wps->ext_reg = 2; /* past M2/M2D phase */ 3093 } 3094 if (wps->ext_reg > 1) 3095 wps_registrar_free_pending_m2(wps->wps); 3096 if (wps->wps->wps_upnp && wps->ext_reg && 3097 wps->wps->upnp_msgs == NULL && 3098 (op_code == WSC_MSG || op_code == WSC_Done || op_code == WSC_NACK)) 3099 { 3100 struct wps_parse_attr attr; 3101 int type; 3102 if (wps_parse_msg(msg, &attr) < 0 || attr.msg_type == NULL) 3103 type = -1; 3104 else 3105 type = *attr.msg_type; 3106 wpa_printf(MSG_DEBUG, "WPS: Sending received message (type %d)" 3107 " to external Registrar for processing", type); 3108 upnp_wps_device_send_wlan_event(wps->wps->wps_upnp, 3109 wps->mac_addr_e, 3110 UPNP_WPS_WLANEVENT_TYPE_EAP, 3111 msg); 3112 if (op_code == WSC_MSG) 3113 return WPS_PENDING; 3114 } else if (wps->wps->wps_upnp && wps->ext_reg && op_code == WSC_MSG) { 3115 wpa_printf(MSG_DEBUG, "WPS: Skip internal processing - using " 3116 "external Registrar"); 3117 return WPS_CONTINUE; 3118 } 3119 #endif /* CONFIG_WPS_UPNP */ 3120 3121 switch (op_code) { 3122 case WSC_MSG: 3123 return wps_process_wsc_msg(wps, msg); 3124 case WSC_ACK: 3125 if (wps_validate_wsc_ack(msg) < 0) 3126 return WPS_FAILURE; 3127 return wps_process_wsc_ack(wps, msg); 3128 case WSC_NACK: 3129 if (wps_validate_wsc_nack(msg) < 0) 3130 return WPS_FAILURE; 3131 return wps_process_wsc_nack(wps, msg); 3132 case WSC_Done: 3133 if (wps_validate_wsc_done(msg) < 0) 3134 return WPS_FAILURE; 3135 ret = wps_process_wsc_done(wps, msg); 3136 if (ret == WPS_FAILURE) { 3137 wps->state = SEND_WSC_NACK; 3138 wps_fail_event(wps->wps, WPS_WSC_DONE, 3139 wps->config_error, 3140 wps->error_indication); 3141 } 3142 return ret; 3143 default: 3144 wpa_printf(MSG_DEBUG, "WPS: Unsupported op_code %d", op_code); 3145 return WPS_FAILURE; 3146 } 3147 } 3148 3149 3150 int wps_registrar_update_ie(struct wps_registrar *reg) 3151 { 3152 return wps_set_ie(reg); 3153 } 3154 3155 3156 static void wps_registrar_set_selected_timeout(void *eloop_ctx, 3157 void *timeout_ctx) 3158 { 3159 struct wps_registrar *reg = eloop_ctx; 3160 3161 wpa_printf(MSG_DEBUG, "WPS: Selected Registrar timeout - " 3162 "unselect internal Registrar"); 3163 reg->selected_registrar = 0; 3164 reg->pbc = 0; 3165 wps_registrar_selected_registrar_changed(reg); 3166 } 3167 3168 3169 #ifdef CONFIG_WPS_UPNP 3170 static void wps_registrar_sel_reg_add(struct wps_registrar *reg, 3171 struct subscription *s) 3172 { 3173 int i, j; 3174 wpa_printf(MSG_DEBUG, "WPS: External Registrar selected (dev_pw_id=%d " 3175 "config_methods=0x%x)", 3176 s->dev_password_id, s->config_methods); 3177 reg->sel_reg_union = 1; 3178 if (reg->sel_reg_dev_password_id_override != DEV_PW_PUSHBUTTON) 3179 reg->sel_reg_dev_password_id_override = s->dev_password_id; 3180 if (reg->sel_reg_config_methods_override == -1) 3181 reg->sel_reg_config_methods_override = 0; 3182 reg->sel_reg_config_methods_override |= s->config_methods; 3183 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) 3184 if (is_zero_ether_addr(reg->authorized_macs_union[i])) 3185 break; 3186 for (j = 0; i < WPS_MAX_AUTHORIZED_MACS && j < WPS_MAX_AUTHORIZED_MACS; 3187 j++) { 3188 if (is_zero_ether_addr(s->authorized_macs[j])) 3189 break; 3190 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC into union: " 3191 MACSTR, MAC2STR(s->authorized_macs[j])); 3192 os_memcpy(reg->authorized_macs_union[i], 3193 s->authorized_macs[j], ETH_ALEN); 3194 i++; 3195 } 3196 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union", 3197 (u8 *) reg->authorized_macs_union, 3198 sizeof(reg->authorized_macs_union)); 3199 } 3200 #endif /* CONFIG_WPS_UPNP */ 3201 3202 3203 static void wps_registrar_sel_reg_union(struct wps_registrar *reg) 3204 { 3205 #ifdef CONFIG_WPS_UPNP 3206 struct subscription *s; 3207 3208 if (reg->wps->wps_upnp == NULL) 3209 return; 3210 3211 dl_list_for_each(s, ®->wps->wps_upnp->subscriptions, 3212 struct subscription, list) { 3213 struct subscr_addr *sa; 3214 sa = dl_list_first(&s->addr_list, struct subscr_addr, list); 3215 if (sa) { 3216 wpa_printf(MSG_DEBUG, "WPS: External Registrar %s:%d", 3217 inet_ntoa(sa->saddr.sin_addr), 3218 ntohs(sa->saddr.sin_port)); 3219 } 3220 if (s->selected_registrar) 3221 wps_registrar_sel_reg_add(reg, s); 3222 else 3223 wpa_printf(MSG_DEBUG, "WPS: External Registrar not " 3224 "selected"); 3225 } 3226 #endif /* CONFIG_WPS_UPNP */ 3227 } 3228 3229 3230 /** 3231 * wps_registrar_selected_registrar_changed - SetSelectedRegistrar change 3232 * @reg: Registrar data from wps_registrar_init() 3233 * 3234 * This function is called when selected registrar state changes, e.g., when an 3235 * AP receives a SetSelectedRegistrar UPnP message. 3236 */ 3237 void wps_registrar_selected_registrar_changed(struct wps_registrar *reg) 3238 { 3239 wpa_printf(MSG_DEBUG, "WPS: Selected registrar information changed"); 3240 3241 reg->sel_reg_union = reg->selected_registrar; 3242 reg->sel_reg_dev_password_id_override = -1; 3243 reg->sel_reg_config_methods_override = -1; 3244 os_memcpy(reg->authorized_macs_union, reg->authorized_macs, 3245 WPS_MAX_AUTHORIZED_MACS * ETH_ALEN); 3246 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union (start with own)", 3247 (u8 *) reg->authorized_macs_union, 3248 sizeof(reg->authorized_macs_union)); 3249 if (reg->selected_registrar) { 3250 u16 methods; 3251 3252 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 3253 #ifdef CONFIG_WPS2 3254 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 3255 WPS_CONFIG_PHY_PUSHBUTTON); 3256 #endif /* CONFIG_WPS2 */ 3257 if (reg->pbc) { 3258 reg->sel_reg_dev_password_id_override = 3259 DEV_PW_PUSHBUTTON; 3260 wps_set_pushbutton(&methods, reg->wps->config_methods); 3261 } 3262 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar selected " 3263 "(pbc=%d)", reg->pbc); 3264 reg->sel_reg_config_methods_override = methods; 3265 } else 3266 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar not selected"); 3267 3268 wps_registrar_sel_reg_union(reg); 3269 3270 wps_set_ie(reg); 3271 wps_cb_set_sel_reg(reg); 3272 } 3273 3274 3275 int wps_registrar_get_info(struct wps_registrar *reg, const u8 *addr, 3276 char *buf, size_t buflen) 3277 { 3278 struct wps_registrar_device *d; 3279 int len = 0, ret; 3280 char uuid[40]; 3281 char devtype[WPS_DEV_TYPE_BUFSIZE]; 3282 3283 d = wps_device_get(reg, addr); 3284 if (d == NULL) 3285 return 0; 3286 if (uuid_bin2str(d->uuid, uuid, sizeof(uuid))) 3287 return 0; 3288 3289 ret = os_snprintf(buf + len, buflen - len, 3290 "wpsUuid=%s\n" 3291 "wpsPrimaryDeviceType=%s\n" 3292 "wpsDeviceName=%s\n" 3293 "wpsManufacturer=%s\n" 3294 "wpsModelName=%s\n" 3295 "wpsModelNumber=%s\n" 3296 "wpsSerialNumber=%s\n", 3297 uuid, 3298 wps_dev_type_bin2str(d->dev.pri_dev_type, devtype, 3299 sizeof(devtype)), 3300 d->dev.device_name ? d->dev.device_name : "", 3301 d->dev.manufacturer ? d->dev.manufacturer : "", 3302 d->dev.model_name ? d->dev.model_name : "", 3303 d->dev.model_number ? d->dev.model_number : "", 3304 d->dev.serial_number ? d->dev.serial_number : ""); 3305 if (ret < 0 || (size_t) ret >= buflen - len) 3306 return len; 3307 len += ret; 3308 3309 return len; 3310 } 3311 3312 3313 int wps_registrar_config_ap(struct wps_registrar *reg, 3314 struct wps_credential *cred) 3315 { 3316 #ifdef CONFIG_WPS2 3317 printf("encr_type=0x%x\n", cred->encr_type); 3318 if (!(cred->encr_type & (WPS_ENCR_NONE | WPS_ENCR_TKIP | 3319 WPS_ENCR_AES))) { 3320 if (cred->encr_type & WPS_ENCR_WEP) { 3321 wpa_printf(MSG_INFO, "WPS: Reject new AP settings " 3322 "due to WEP configuration"); 3323 return -1; 3324 } 3325 3326 wpa_printf(MSG_INFO, "WPS: Reject new AP settings due to " 3327 "invalid encr_type 0x%x", cred->encr_type); 3328 return -1; 3329 } 3330 3331 if ((cred->encr_type & (WPS_ENCR_TKIP | WPS_ENCR_AES)) == 3332 WPS_ENCR_TKIP) { 3333 wpa_printf(MSG_DEBUG, "WPS: Upgrade encr_type TKIP -> " 3334 "TKIP+AES"); 3335 cred->encr_type |= WPS_ENCR_AES; 3336 } 3337 3338 if ((cred->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) == 3339 WPS_AUTH_WPAPSK) { 3340 wpa_printf(MSG_DEBUG, "WPS: Upgrade auth_type WPAPSK -> " 3341 "WPAPSK+WPA2PSK"); 3342 cred->auth_type |= WPS_AUTH_WPA2PSK; 3343 } 3344 #endif /* CONFIG_WPS2 */ 3345 3346 if (reg->wps->cred_cb) 3347 return reg->wps->cred_cb(reg->wps->cb_ctx, cred); 3348 3349 return -1; 3350 } 3351
