1 /* 2 * Wi-Fi Protected Setup - Registrar 3 * Copyright (c) 2008-2013, Jouni Malinen <j@w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9 #include "utils/includes.h" 10 11 #include "utils/common.h" 12 #include "utils/base64.h" 13 #include "utils/eloop.h" 14 #include "utils/uuid.h" 15 #include "utils/list.h" 16 #include "crypto/crypto.h" 17 #include "crypto/sha256.h" 18 #include "crypto/random.h" 19 #include "common/ieee802_11_defs.h" 20 #include "wps_i.h" 21 #include "wps_dev_attr.h" 22 #include "wps_upnp.h" 23 #include "wps_upnp_i.h" 24 25 #ifndef CONFIG_WPS_STRICT 26 #define WPS_WORKAROUNDS 27 #endif /* CONFIG_WPS_STRICT */ 28 29 #ifdef CONFIG_WPS_NFC 30 31 struct wps_nfc_pw_token { 32 struct dl_list list; 33 u8 pubkey_hash[WPS_OOB_PUBKEY_HASH_LEN]; 34 unsigned int peer_pk_hash_known:1; 35 u16 pw_id; 36 u8 dev_pw[WPS_OOB_DEVICE_PASSWORD_LEN * 2 + 1]; 37 size_t dev_pw_len; 38 int pk_hash_provided_oob; /* whether own PK hash was provided OOB */ 39 }; 40 41 42 static void wps_remove_nfc_pw_token(struct wps_nfc_pw_token *token) 43 { 44 dl_list_del(&token->list); 45 bin_clear_free(token, sizeof(*token)); 46 } 47 48 49 static void wps_free_nfc_pw_tokens(struct dl_list *tokens, u16 pw_id) 50 { 51 struct wps_nfc_pw_token *token, *prev; 52 dl_list_for_each_safe(token, prev, tokens, struct wps_nfc_pw_token, 53 list) { 54 if (pw_id == 0 || pw_id == token->pw_id) 55 wps_remove_nfc_pw_token(token); 56 } 57 } 58 59 60 static struct wps_nfc_pw_token * wps_get_nfc_pw_token(struct dl_list *tokens, 61 u16 pw_id) 62 { 63 struct wps_nfc_pw_token *token; 64 dl_list_for_each(token, tokens, struct wps_nfc_pw_token, list) { 65 if (pw_id == token->pw_id) 66 return token; 67 } 68 return NULL; 69 } 70 71 #else /* CONFIG_WPS_NFC */ 72 73 #define wps_free_nfc_pw_tokens(t, p) do { } while (0) 74 75 #endif /* CONFIG_WPS_NFC */ 76 77 78 struct wps_uuid_pin { 79 struct dl_list list; 80 u8 uuid[WPS_UUID_LEN]; 81 int wildcard_uuid; 82 u8 *pin; 83 size_t pin_len; 84 #define PIN_LOCKED BIT(0) 85 #define PIN_EXPIRES BIT(1) 86 int flags; 87 struct os_reltime expiration; 88 u8 enrollee_addr[ETH_ALEN]; 89 }; 90 91 92 static void wps_free_pin(struct wps_uuid_pin *pin) 93 { 94 bin_clear_free(pin->pin, pin->pin_len); 95 os_free(pin); 96 } 97 98 99 static void wps_remove_pin(struct wps_uuid_pin *pin) 100 { 101 dl_list_del(&pin->list); 102 wps_free_pin(pin); 103 } 104 105 106 static void wps_free_pins(struct dl_list *pins) 107 { 108 struct wps_uuid_pin *pin, *prev; 109 dl_list_for_each_safe(pin, prev, pins, struct wps_uuid_pin, list) 110 wps_remove_pin(pin); 111 } 112 113 114 struct wps_pbc_session { 115 struct wps_pbc_session *next; 116 u8 addr[ETH_ALEN]; 117 u8 uuid_e[WPS_UUID_LEN]; 118 struct os_reltime timestamp; 119 }; 120 121 122 static void wps_free_pbc_sessions(struct wps_pbc_session *pbc) 123 { 124 struct wps_pbc_session *prev; 125 126 while (pbc) { 127 prev = pbc; 128 pbc = pbc->next; 129 os_free(prev); 130 } 131 } 132 133 134 struct wps_registrar_device { 135 struct wps_registrar_device *next; 136 struct wps_device_data dev; 137 u8 uuid[WPS_UUID_LEN]; 138 }; 139 140 141 struct wps_registrar { 142 struct wps_context *wps; 143 144 int pbc; 145 int selected_registrar; 146 147 int (*new_psk_cb)(void *ctx, const u8 *mac_addr, const u8 *p2p_dev_addr, 148 const u8 *psk, size_t psk_len); 149 int (*set_ie_cb)(void *ctx, struct wpabuf *beacon_ie, 150 struct wpabuf *probe_resp_ie); 151 void (*pin_needed_cb)(void *ctx, const u8 *uuid_e, 152 const struct wps_device_data *dev); 153 void (*reg_success_cb)(void *ctx, const u8 *mac_addr, 154 const u8 *uuid_e, const u8 *dev_pw, 155 size_t dev_pw_len); 156 void (*set_sel_reg_cb)(void *ctx, int sel_reg, u16 dev_passwd_id, 157 u16 sel_reg_config_methods); 158 void (*enrollee_seen_cb)(void *ctx, const u8 *addr, const u8 *uuid_e, 159 const u8 *pri_dev_type, u16 config_methods, 160 u16 dev_password_id, u8 request_type, 161 const char *dev_name); 162 void *cb_ctx; 163 164 struct dl_list pins; 165 struct dl_list nfc_pw_tokens; 166 struct wps_pbc_session *pbc_sessions; 167 168 int skip_cred_build; 169 struct wpabuf *extra_cred; 170 int disable_auto_conf; 171 int sel_reg_union; 172 int sel_reg_dev_password_id_override; 173 int sel_reg_config_methods_override; 174 int static_wep_only; 175 int dualband; 176 int force_per_enrollee_psk; 177 178 struct wps_registrar_device *devices; 179 180 int force_pbc_overlap; 181 182 u8 authorized_macs[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN]; 183 u8 authorized_macs_union[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN]; 184 185 u8 p2p_dev_addr[ETH_ALEN]; 186 187 u8 pbc_ignore_uuid[WPS_UUID_LEN]; 188 #ifdef WPS_WORKAROUNDS 189 struct os_reltime pbc_ignore_start; 190 #endif /* WPS_WORKAROUNDS */ 191 }; 192 193 194 static int wps_set_ie(struct wps_registrar *reg); 195 static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx); 196 static void wps_registrar_set_selected_timeout(void *eloop_ctx, 197 void *timeout_ctx); 198 static void wps_registrar_remove_pin(struct wps_registrar *reg, 199 struct wps_uuid_pin *pin); 200 201 202 static void wps_registrar_add_authorized_mac(struct wps_registrar *reg, 203 const u8 *addr) 204 { 205 int i; 206 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC " MACSTR, 207 MAC2STR(addr)); 208 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) 209 if (os_memcmp(reg->authorized_macs[i], addr, ETH_ALEN) == 0) { 210 wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was " 211 "already in the list"); 212 return; /* already in list */ 213 } 214 for (i = WPS_MAX_AUTHORIZED_MACS - 1; i > 0; i--) 215 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i - 1], 216 ETH_ALEN); 217 os_memcpy(reg->authorized_macs[0], addr, ETH_ALEN); 218 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs", 219 (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs)); 220 } 221 222 223 static void wps_registrar_remove_authorized_mac(struct wps_registrar *reg, 224 const u8 *addr) 225 { 226 int i; 227 wpa_printf(MSG_DEBUG, "WPS: Remove authorized MAC " MACSTR, 228 MAC2STR(addr)); 229 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) { 230 if (os_memcmp(reg->authorized_macs, addr, ETH_ALEN) == 0) 231 break; 232 } 233 if (i == WPS_MAX_AUTHORIZED_MACS) { 234 wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was not in the " 235 "list"); 236 return; /* not in the list */ 237 } 238 for (; i + 1 < WPS_MAX_AUTHORIZED_MACS; i++) 239 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i + 1], 240 ETH_ALEN); 241 os_memset(reg->authorized_macs[WPS_MAX_AUTHORIZED_MACS - 1], 0, 242 ETH_ALEN); 243 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs", 244 (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs)); 245 } 246 247 248 static void wps_free_devices(struct wps_registrar_device *dev) 249 { 250 struct wps_registrar_device *prev; 251 252 while (dev) { 253 prev = dev; 254 dev = dev->next; 255 wps_device_data_free(&prev->dev); 256 os_free(prev); 257 } 258 } 259 260 261 static struct wps_registrar_device * wps_device_get(struct wps_registrar *reg, 262 const u8 *addr) 263 { 264 struct wps_registrar_device *dev; 265 266 for (dev = reg->devices; dev; dev = dev->next) { 267 if (os_memcmp(dev->dev.mac_addr, addr, ETH_ALEN) == 0) 268 return dev; 269 } 270 return NULL; 271 } 272 273 274 static void wps_device_clone_data(struct wps_device_data *dst, 275 struct wps_device_data *src) 276 { 277 os_memcpy(dst->mac_addr, src->mac_addr, ETH_ALEN); 278 os_memcpy(dst->pri_dev_type, src->pri_dev_type, WPS_DEV_TYPE_LEN); 279 280 #define WPS_STRDUP(n) \ 281 os_free(dst->n); \ 282 dst->n = src->n ? os_strdup(src->n) : NULL 283 284 WPS_STRDUP(device_name); 285 WPS_STRDUP(manufacturer); 286 WPS_STRDUP(model_name); 287 WPS_STRDUP(model_number); 288 WPS_STRDUP(serial_number); 289 #undef WPS_STRDUP 290 } 291 292 293 int wps_device_store(struct wps_registrar *reg, 294 struct wps_device_data *dev, const u8 *uuid) 295 { 296 struct wps_registrar_device *d; 297 298 d = wps_device_get(reg, dev->mac_addr); 299 if (d == NULL) { 300 d = os_zalloc(sizeof(*d)); 301 if (d == NULL) 302 return -1; 303 d->next = reg->devices; 304 reg->devices = d; 305 } 306 307 wps_device_clone_data(&d->dev, dev); 308 os_memcpy(d->uuid, uuid, WPS_UUID_LEN); 309 310 return 0; 311 } 312 313 314 static void wps_registrar_add_pbc_session(struct wps_registrar *reg, 315 const u8 *addr, const u8 *uuid_e) 316 { 317 struct wps_pbc_session *pbc, *prev = NULL; 318 struct os_reltime now; 319 320 os_get_reltime(&now); 321 322 pbc = reg->pbc_sessions; 323 while (pbc) { 324 if (os_memcmp(pbc->addr, addr, ETH_ALEN) == 0 && 325 os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0) { 326 if (prev) 327 prev->next = pbc->next; 328 else 329 reg->pbc_sessions = pbc->next; 330 break; 331 } 332 prev = pbc; 333 pbc = pbc->next; 334 } 335 336 if (!pbc) { 337 pbc = os_zalloc(sizeof(*pbc)); 338 if (pbc == NULL) 339 return; 340 os_memcpy(pbc->addr, addr, ETH_ALEN); 341 if (uuid_e) 342 os_memcpy(pbc->uuid_e, uuid_e, WPS_UUID_LEN); 343 } 344 345 pbc->next = reg->pbc_sessions; 346 reg->pbc_sessions = pbc; 347 pbc->timestamp = now; 348 349 /* remove entries that have timed out */ 350 prev = pbc; 351 pbc = pbc->next; 352 353 while (pbc) { 354 if (os_reltime_expired(&now, &pbc->timestamp, 355 WPS_PBC_WALK_TIME)) { 356 prev->next = NULL; 357 wps_free_pbc_sessions(pbc); 358 break; 359 } 360 prev = pbc; 361 pbc = pbc->next; 362 } 363 } 364 365 366 static void wps_registrar_remove_pbc_session(struct wps_registrar *reg, 367 const u8 *uuid_e, 368 const u8 *p2p_dev_addr) 369 { 370 struct wps_pbc_session *pbc, *prev = NULL, *tmp; 371 372 pbc = reg->pbc_sessions; 373 while (pbc) { 374 if (os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0 || 375 (p2p_dev_addr && !is_zero_ether_addr(reg->p2p_dev_addr) && 376 os_memcmp(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN) == 377 0)) { 378 if (prev) 379 prev->next = pbc->next; 380 else 381 reg->pbc_sessions = pbc->next; 382 tmp = pbc; 383 pbc = pbc->next; 384 wpa_printf(MSG_DEBUG, "WPS: Removing PBC session for " 385 "addr=" MACSTR, MAC2STR(tmp->addr)); 386 wpa_hexdump(MSG_DEBUG, "WPS: Removed UUID-E", 387 tmp->uuid_e, WPS_UUID_LEN); 388 os_free(tmp); 389 continue; 390 } 391 prev = pbc; 392 pbc = pbc->next; 393 } 394 } 395 396 397 int wps_registrar_pbc_overlap(struct wps_registrar *reg, 398 const u8 *addr, const u8 *uuid_e) 399 { 400 int count = 0; 401 struct wps_pbc_session *pbc; 402 struct wps_pbc_session *first = NULL; 403 struct os_reltime now; 404 405 os_get_reltime(&now); 406 407 wpa_printf(MSG_DEBUG, "WPS: Checking active PBC sessions for overlap"); 408 409 if (uuid_e) { 410 wpa_printf(MSG_DEBUG, "WPS: Add one for the requested UUID"); 411 wpa_hexdump(MSG_DEBUG, "WPS: Requested UUID", 412 uuid_e, WPS_UUID_LEN); 413 count++; 414 } 415 416 for (pbc = reg->pbc_sessions; pbc; pbc = pbc->next) { 417 wpa_printf(MSG_DEBUG, "WPS: Consider PBC session with " MACSTR, 418 MAC2STR(pbc->addr)); 419 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", 420 pbc->uuid_e, WPS_UUID_LEN); 421 if (os_reltime_expired(&now, &pbc->timestamp, 422 WPS_PBC_WALK_TIME)) { 423 wpa_printf(MSG_DEBUG, "WPS: PBC walk time has expired"); 424 break; 425 } 426 if (first && 427 os_memcmp(pbc->uuid_e, first->uuid_e, WPS_UUID_LEN) == 0) { 428 wpa_printf(MSG_DEBUG, "WPS: Same Enrollee"); 429 continue; /* same Enrollee */ 430 } 431 if (uuid_e == NULL || 432 os_memcmp(uuid_e, pbc->uuid_e, WPS_UUID_LEN)) { 433 wpa_printf(MSG_DEBUG, "WPS: New Enrollee"); 434 count++; 435 } 436 if (first == NULL) 437 first = pbc; 438 } 439 440 wpa_printf(MSG_DEBUG, "WPS: %u active PBC session(s) found", count); 441 442 return count > 1 ? 1 : 0; 443 } 444 445 446 static int wps_build_wps_state(struct wps_context *wps, struct wpabuf *msg) 447 { 448 wpa_printf(MSG_DEBUG, "WPS: * Wi-Fi Protected Setup State (%d)", 449 wps->wps_state); 450 wpabuf_put_be16(msg, ATTR_WPS_STATE); 451 wpabuf_put_be16(msg, 1); 452 wpabuf_put_u8(msg, wps->wps_state); 453 return 0; 454 } 455 456 457 #ifdef CONFIG_WPS_UPNP 458 static void wps_registrar_free_pending_m2(struct wps_context *wps) 459 { 460 struct upnp_pending_message *p, *p2, *prev = NULL; 461 p = wps->upnp_msgs; 462 while (p) { 463 if (p->type == WPS_M2 || p->type == WPS_M2D) { 464 if (prev == NULL) 465 wps->upnp_msgs = p->next; 466 else 467 prev->next = p->next; 468 wpa_printf(MSG_DEBUG, "WPS UPnP: Drop pending M2/M2D"); 469 p2 = p; 470 p = p->next; 471 wpabuf_free(p2->msg); 472 os_free(p2); 473 continue; 474 } 475 prev = p; 476 p = p->next; 477 } 478 } 479 #endif /* CONFIG_WPS_UPNP */ 480 481 482 static int wps_build_ap_setup_locked(struct wps_context *wps, 483 struct wpabuf *msg) 484 { 485 if (wps->ap_setup_locked && wps->ap_setup_locked != 2) { 486 wpa_printf(MSG_DEBUG, "WPS: * AP Setup Locked"); 487 wpabuf_put_be16(msg, ATTR_AP_SETUP_LOCKED); 488 wpabuf_put_be16(msg, 1); 489 wpabuf_put_u8(msg, 1); 490 } 491 return 0; 492 } 493 494 495 static int wps_build_selected_registrar(struct wps_registrar *reg, 496 struct wpabuf *msg) 497 { 498 if (!reg->sel_reg_union) 499 return 0; 500 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar"); 501 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR); 502 wpabuf_put_be16(msg, 1); 503 wpabuf_put_u8(msg, 1); 504 return 0; 505 } 506 507 508 static int wps_build_sel_reg_dev_password_id(struct wps_registrar *reg, 509 struct wpabuf *msg) 510 { 511 u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT; 512 if (!reg->sel_reg_union) 513 return 0; 514 if (reg->sel_reg_dev_password_id_override >= 0) 515 id = reg->sel_reg_dev_password_id_override; 516 wpa_printf(MSG_DEBUG, "WPS: * Device Password ID (%d)", id); 517 wpabuf_put_be16(msg, ATTR_DEV_PASSWORD_ID); 518 wpabuf_put_be16(msg, 2); 519 wpabuf_put_be16(msg, id); 520 return 0; 521 } 522 523 524 static int wps_build_sel_pbc_reg_uuid_e(struct wps_registrar *reg, 525 struct wpabuf *msg) 526 { 527 u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT; 528 if (!reg->sel_reg_union) 529 return 0; 530 if (reg->sel_reg_dev_password_id_override >= 0) 531 id = reg->sel_reg_dev_password_id_override; 532 if (id != DEV_PW_PUSHBUTTON || !reg->dualband) 533 return 0; 534 return wps_build_uuid_e(msg, reg->wps->uuid); 535 } 536 537 538 static void wps_set_pushbutton(u16 *methods, u16 conf_methods) 539 { 540 *methods |= WPS_CONFIG_PUSHBUTTON; 541 if ((conf_methods & WPS_CONFIG_VIRT_PUSHBUTTON) == 542 WPS_CONFIG_VIRT_PUSHBUTTON) 543 *methods |= WPS_CONFIG_VIRT_PUSHBUTTON; 544 if ((conf_methods & WPS_CONFIG_PHY_PUSHBUTTON) == 545 WPS_CONFIG_PHY_PUSHBUTTON) 546 *methods |= WPS_CONFIG_PHY_PUSHBUTTON; 547 if ((*methods & WPS_CONFIG_VIRT_PUSHBUTTON) != 548 WPS_CONFIG_VIRT_PUSHBUTTON && 549 (*methods & WPS_CONFIG_PHY_PUSHBUTTON) != 550 WPS_CONFIG_PHY_PUSHBUTTON) { 551 /* 552 * Required to include virtual/physical flag, but we were not 553 * configured with push button type, so have to default to one 554 * of them. 555 */ 556 *methods |= WPS_CONFIG_PHY_PUSHBUTTON; 557 } 558 } 559 560 561 static int wps_build_sel_reg_config_methods(struct wps_registrar *reg, 562 struct wpabuf *msg) 563 { 564 u16 methods; 565 if (!reg->sel_reg_union) 566 return 0; 567 methods = reg->wps->config_methods; 568 methods &= ~WPS_CONFIG_PUSHBUTTON; 569 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 570 WPS_CONFIG_PHY_PUSHBUTTON); 571 if (reg->pbc) 572 wps_set_pushbutton(&methods, reg->wps->config_methods); 573 if (reg->sel_reg_config_methods_override >= 0) 574 methods = reg->sel_reg_config_methods_override; 575 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar Config Methods (%x)", 576 methods); 577 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR_CONFIG_METHODS); 578 wpabuf_put_be16(msg, 2); 579 wpabuf_put_be16(msg, methods); 580 return 0; 581 } 582 583 584 static int wps_build_probe_config_methods(struct wps_registrar *reg, 585 struct wpabuf *msg) 586 { 587 u16 methods; 588 /* 589 * These are the methods that the AP supports as an Enrollee for adding 590 * external Registrars. 591 */ 592 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 593 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 594 WPS_CONFIG_PHY_PUSHBUTTON); 595 wpa_printf(MSG_DEBUG, "WPS: * Config Methods (%x)", methods); 596 wpabuf_put_be16(msg, ATTR_CONFIG_METHODS); 597 wpabuf_put_be16(msg, 2); 598 wpabuf_put_be16(msg, methods); 599 return 0; 600 } 601 602 603 static int wps_build_config_methods_r(struct wps_registrar *reg, 604 struct wpabuf *msg) 605 { 606 return wps_build_config_methods(msg, reg->wps->config_methods); 607 } 608 609 610 const u8 * wps_authorized_macs(struct wps_registrar *reg, size_t *count) 611 { 612 *count = 0; 613 614 while (*count < WPS_MAX_AUTHORIZED_MACS) { 615 if (is_zero_ether_addr(reg->authorized_macs_union[*count])) 616 break; 617 (*count)++; 618 } 619 620 return (const u8 *) reg->authorized_macs_union; 621 } 622 623 624 /** 625 * wps_registrar_init - Initialize WPS Registrar data 626 * @wps: Pointer to longterm WPS context 627 * @cfg: Registrar configuration 628 * Returns: Pointer to allocated Registrar data or %NULL on failure 629 * 630 * This function is used to initialize WPS Registrar functionality. It can be 631 * used for a single Registrar run (e.g., when run in a supplicant) or multiple 632 * runs (e.g., when run as an internal Registrar in an AP). Caller is 633 * responsible for freeing the returned data with wps_registrar_deinit() when 634 * Registrar functionality is not needed anymore. 635 */ 636 struct wps_registrar * 637 wps_registrar_init(struct wps_context *wps, 638 const struct wps_registrar_config *cfg) 639 { 640 struct wps_registrar *reg = os_zalloc(sizeof(*reg)); 641 if (reg == NULL) 642 return NULL; 643 644 dl_list_init(®->pins); 645 dl_list_init(®->nfc_pw_tokens); 646 reg->wps = wps; 647 reg->new_psk_cb = cfg->new_psk_cb; 648 reg->set_ie_cb = cfg->set_ie_cb; 649 reg->pin_needed_cb = cfg->pin_needed_cb; 650 reg->reg_success_cb = cfg->reg_success_cb; 651 reg->set_sel_reg_cb = cfg->set_sel_reg_cb; 652 reg->enrollee_seen_cb = cfg->enrollee_seen_cb; 653 reg->cb_ctx = cfg->cb_ctx; 654 reg->skip_cred_build = cfg->skip_cred_build; 655 if (cfg->extra_cred) { 656 reg->extra_cred = wpabuf_alloc_copy(cfg->extra_cred, 657 cfg->extra_cred_len); 658 if (reg->extra_cred == NULL) { 659 os_free(reg); 660 return NULL; 661 } 662 } 663 reg->disable_auto_conf = cfg->disable_auto_conf; 664 reg->sel_reg_dev_password_id_override = -1; 665 reg->sel_reg_config_methods_override = -1; 666 reg->static_wep_only = cfg->static_wep_only; 667 reg->dualband = cfg->dualband; 668 reg->force_per_enrollee_psk = cfg->force_per_enrollee_psk; 669 670 if (wps_set_ie(reg)) { 671 wps_registrar_deinit(reg); 672 return NULL; 673 } 674 675 return reg; 676 } 677 678 679 void wps_registrar_flush(struct wps_registrar *reg) 680 { 681 if (reg == NULL) 682 return; 683 wps_free_pins(®->pins); 684 wps_free_nfc_pw_tokens(®->nfc_pw_tokens, 0); 685 wps_free_pbc_sessions(reg->pbc_sessions); 686 reg->pbc_sessions = NULL; 687 wps_free_devices(reg->devices); 688 reg->devices = NULL; 689 #ifdef WPS_WORKAROUNDS 690 reg->pbc_ignore_start.sec = 0; 691 #endif /* WPS_WORKAROUNDS */ 692 } 693 694 695 /** 696 * wps_registrar_deinit - Deinitialize WPS Registrar data 697 * @reg: Registrar data from wps_registrar_init() 698 */ 699 void wps_registrar_deinit(struct wps_registrar *reg) 700 { 701 if (reg == NULL) 702 return; 703 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 704 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 705 wps_registrar_flush(reg); 706 wpabuf_free(reg->extra_cred); 707 os_free(reg); 708 } 709 710 711 static void wps_registrar_invalidate_unused(struct wps_registrar *reg) 712 { 713 struct wps_uuid_pin *pin; 714 715 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 716 if (pin->wildcard_uuid == 1 && !(pin->flags & PIN_LOCKED)) { 717 wpa_printf(MSG_DEBUG, "WPS: Invalidate previously " 718 "configured wildcard PIN"); 719 wps_registrar_remove_pin(reg, pin); 720 break; 721 } 722 } 723 } 724 725 726 /** 727 * wps_registrar_add_pin - Configure a new PIN for Registrar 728 * @reg: Registrar data from wps_registrar_init() 729 * @addr: Enrollee MAC address or %NULL if not known 730 * @uuid: UUID-E or %NULL for wildcard (any UUID) 731 * @pin: PIN (Device Password) 732 * @pin_len: Length of pin in octets 733 * @timeout: Time (in seconds) when the PIN will be invalidated; 0 = no timeout 734 * Returns: 0 on success, -1 on failure 735 */ 736 int wps_registrar_add_pin(struct wps_registrar *reg, const u8 *addr, 737 const u8 *uuid, const u8 *pin, size_t pin_len, 738 int timeout) 739 { 740 struct wps_uuid_pin *p; 741 742 p = os_zalloc(sizeof(*p)); 743 if (p == NULL) 744 return -1; 745 if (addr) 746 os_memcpy(p->enrollee_addr, addr, ETH_ALEN); 747 if (uuid == NULL) 748 p->wildcard_uuid = 1; 749 else 750 os_memcpy(p->uuid, uuid, WPS_UUID_LEN); 751 p->pin = os_malloc(pin_len); 752 if (p->pin == NULL) { 753 os_free(p); 754 return -1; 755 } 756 os_memcpy(p->pin, pin, pin_len); 757 p->pin_len = pin_len; 758 759 if (timeout) { 760 p->flags |= PIN_EXPIRES; 761 os_get_reltime(&p->expiration); 762 p->expiration.sec += timeout; 763 } 764 765 if (p->wildcard_uuid) 766 wps_registrar_invalidate_unused(reg); 767 768 dl_list_add(®->pins, &p->list); 769 770 wpa_printf(MSG_DEBUG, "WPS: A new PIN configured (timeout=%d)", 771 timeout); 772 wpa_hexdump(MSG_DEBUG, "WPS: UUID", uuid, WPS_UUID_LEN); 773 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: PIN", pin, pin_len); 774 reg->selected_registrar = 1; 775 reg->pbc = 0; 776 if (addr) 777 wps_registrar_add_authorized_mac(reg, addr); 778 else 779 wps_registrar_add_authorized_mac( 780 reg, (u8 *) "\xff\xff\xff\xff\xff\xff"); 781 wps_registrar_selected_registrar_changed(reg, 0); 782 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 783 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, 784 wps_registrar_set_selected_timeout, 785 reg, NULL); 786 787 return 0; 788 } 789 790 791 static void wps_registrar_remove_pin(struct wps_registrar *reg, 792 struct wps_uuid_pin *pin) 793 { 794 u8 *addr; 795 u8 bcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 796 797 if (is_zero_ether_addr(pin->enrollee_addr)) 798 addr = bcast; 799 else 800 addr = pin->enrollee_addr; 801 wps_registrar_remove_authorized_mac(reg, addr); 802 wps_remove_pin(pin); 803 wps_registrar_selected_registrar_changed(reg, 0); 804 } 805 806 807 static void wps_registrar_expire_pins(struct wps_registrar *reg) 808 { 809 struct wps_uuid_pin *pin, *prev; 810 struct os_reltime now; 811 812 os_get_reltime(&now); 813 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 814 { 815 if ((pin->flags & PIN_EXPIRES) && 816 os_reltime_before(&pin->expiration, &now)) { 817 wpa_hexdump(MSG_DEBUG, "WPS: Expired PIN for UUID", 818 pin->uuid, WPS_UUID_LEN); 819 wps_registrar_remove_pin(reg, pin); 820 } 821 } 822 } 823 824 825 /** 826 * wps_registrar_invalidate_wildcard_pin - Invalidate a wildcard PIN 827 * @reg: Registrar data from wps_registrar_init() 828 * @dev_pw: PIN to search for or %NULL to match any 829 * @dev_pw_len: Length of dev_pw in octets 830 * Returns: 0 on success, -1 if not wildcard PIN is enabled 831 */ 832 static int wps_registrar_invalidate_wildcard_pin(struct wps_registrar *reg, 833 const u8 *dev_pw, 834 size_t dev_pw_len) 835 { 836 struct wps_uuid_pin *pin, *prev; 837 838 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 839 { 840 if (dev_pw && pin->pin && 841 (dev_pw_len != pin->pin_len || 842 os_memcmp_const(dev_pw, pin->pin, dev_pw_len) != 0)) 843 continue; /* different PIN */ 844 if (pin->wildcard_uuid) { 845 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID", 846 pin->uuid, WPS_UUID_LEN); 847 wps_registrar_remove_pin(reg, pin); 848 return 0; 849 } 850 } 851 852 return -1; 853 } 854 855 856 /** 857 * wps_registrar_invalidate_pin - Invalidate a PIN for a specific UUID-E 858 * @reg: Registrar data from wps_registrar_init() 859 * @uuid: UUID-E 860 * Returns: 0 on success, -1 on failure (e.g., PIN not found) 861 */ 862 int wps_registrar_invalidate_pin(struct wps_registrar *reg, const u8 *uuid) 863 { 864 struct wps_uuid_pin *pin, *prev; 865 866 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 867 { 868 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 869 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID", 870 pin->uuid, WPS_UUID_LEN); 871 wps_registrar_remove_pin(reg, pin); 872 return 0; 873 } 874 } 875 876 return -1; 877 } 878 879 880 static const u8 * wps_registrar_get_pin(struct wps_registrar *reg, 881 const u8 *uuid, size_t *pin_len) 882 { 883 struct wps_uuid_pin *pin, *found = NULL; 884 885 wps_registrar_expire_pins(reg); 886 887 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 888 if (!pin->wildcard_uuid && 889 os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 890 found = pin; 891 break; 892 } 893 } 894 895 if (!found) { 896 /* Check for wildcard UUIDs since none of the UUID-specific 897 * PINs matched */ 898 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 899 if (pin->wildcard_uuid == 1 || 900 pin->wildcard_uuid == 2) { 901 wpa_printf(MSG_DEBUG, "WPS: Found a wildcard " 902 "PIN. Assigned it for this UUID-E"); 903 pin->wildcard_uuid++; 904 os_memcpy(pin->uuid, uuid, WPS_UUID_LEN); 905 found = pin; 906 break; 907 } 908 } 909 } 910 911 if (!found) 912 return NULL; 913 914 /* 915 * Lock the PIN to avoid attacks based on concurrent re-use of the PIN 916 * that could otherwise avoid PIN invalidations. 917 */ 918 if (found->flags & PIN_LOCKED) { 919 wpa_printf(MSG_DEBUG, "WPS: Selected PIN locked - do not " 920 "allow concurrent re-use"); 921 return NULL; 922 } 923 *pin_len = found->pin_len; 924 found->flags |= PIN_LOCKED; 925 return found->pin; 926 } 927 928 929 /** 930 * wps_registrar_unlock_pin - Unlock a PIN for a specific UUID-E 931 * @reg: Registrar data from wps_registrar_init() 932 * @uuid: UUID-E 933 * Returns: 0 on success, -1 on failure 934 * 935 * PINs are locked to enforce only one concurrent use. This function unlocks a 936 * PIN to allow it to be used again. If the specified PIN was configured using 937 * a wildcard UUID, it will be removed instead of allowing multiple uses. 938 */ 939 int wps_registrar_unlock_pin(struct wps_registrar *reg, const u8 *uuid) 940 { 941 struct wps_uuid_pin *pin; 942 943 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 944 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 945 if (pin->wildcard_uuid == 3) { 946 wpa_printf(MSG_DEBUG, "WPS: Invalidating used " 947 "wildcard PIN"); 948 return wps_registrar_invalidate_pin(reg, uuid); 949 } 950 pin->flags &= ~PIN_LOCKED; 951 return 0; 952 } 953 } 954 955 return -1; 956 } 957 958 959 static void wps_registrar_stop_pbc(struct wps_registrar *reg) 960 { 961 reg->selected_registrar = 0; 962 reg->pbc = 0; 963 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN); 964 wps_registrar_remove_authorized_mac(reg, 965 (u8 *) "\xff\xff\xff\xff\xff\xff"); 966 wps_registrar_selected_registrar_changed(reg, 0); 967 } 968 969 970 static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx) 971 { 972 struct wps_registrar *reg = eloop_ctx; 973 974 wpa_printf(MSG_DEBUG, "WPS: PBC timed out - disable PBC mode"); 975 wps_pbc_timeout_event(reg->wps); 976 wps_registrar_stop_pbc(reg); 977 } 978 979 980 /** 981 * wps_registrar_button_pushed - Notify Registrar that AP button was pushed 982 * @reg: Registrar data from wps_registrar_init() 983 * @p2p_dev_addr: Limit allowed PBC devices to the specified P2P device, %NULL 984 * indicates no such filtering 985 * Returns: 0 on success, -1 on failure, -2 on session overlap 986 * 987 * This function is called on an AP when a push button is pushed to activate 988 * PBC mode. The PBC mode will be stopped after walk time (2 minutes) timeout 989 * or when a PBC registration is completed. If more than one Enrollee in active 990 * PBC mode has been detected during the monitor time (previous 2 minutes), the 991 * PBC mode is not activated and -2 is returned to indicate session overlap. 992 * This is skipped if a specific Enrollee is selected. 993 */ 994 int wps_registrar_button_pushed(struct wps_registrar *reg, 995 const u8 *p2p_dev_addr) 996 { 997 if (p2p_dev_addr == NULL && 998 wps_registrar_pbc_overlap(reg, NULL, NULL)) { 999 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - do not start PBC " 1000 "mode"); 1001 wps_pbc_overlap_event(reg->wps); 1002 return -2; 1003 } 1004 wpa_printf(MSG_DEBUG, "WPS: Button pushed - PBC mode started"); 1005 reg->force_pbc_overlap = 0; 1006 reg->selected_registrar = 1; 1007 reg->pbc = 1; 1008 if (p2p_dev_addr) 1009 os_memcpy(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN); 1010 else 1011 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN); 1012 wps_registrar_add_authorized_mac(reg, 1013 (u8 *) "\xff\xff\xff\xff\xff\xff"); 1014 wps_registrar_selected_registrar_changed(reg, 0); 1015 1016 wps_pbc_active_event(reg->wps); 1017 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 1018 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 1019 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wps_registrar_pbc_timeout, 1020 reg, NULL); 1021 return 0; 1022 } 1023 1024 1025 static void wps_registrar_pbc_completed(struct wps_registrar *reg) 1026 { 1027 wpa_printf(MSG_DEBUG, "WPS: PBC completed - stopping PBC mode"); 1028 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 1029 wps_registrar_stop_pbc(reg); 1030 wps_pbc_disable_event(reg->wps); 1031 } 1032 1033 1034 static void wps_registrar_pin_completed(struct wps_registrar *reg) 1035 { 1036 wpa_printf(MSG_DEBUG, "WPS: PIN completed using internal Registrar"); 1037 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 1038 reg->selected_registrar = 0; 1039 wps_registrar_selected_registrar_changed(reg, 0); 1040 } 1041 1042 1043 void wps_registrar_complete(struct wps_registrar *registrar, const u8 *uuid_e, 1044 const u8 *dev_pw, size_t dev_pw_len) 1045 { 1046 if (registrar->pbc) { 1047 wps_registrar_remove_pbc_session(registrar, 1048 uuid_e, NULL); 1049 wps_registrar_pbc_completed(registrar); 1050 #ifdef WPS_WORKAROUNDS 1051 os_get_reltime(®istrar->pbc_ignore_start); 1052 #endif /* WPS_WORKAROUNDS */ 1053 os_memcpy(registrar->pbc_ignore_uuid, uuid_e, WPS_UUID_LEN); 1054 } else { 1055 wps_registrar_pin_completed(registrar); 1056 } 1057 1058 if (dev_pw && 1059 wps_registrar_invalidate_wildcard_pin(registrar, dev_pw, 1060 dev_pw_len) == 0) { 1061 wpa_hexdump_key(MSG_DEBUG, "WPS: Invalidated wildcard PIN", 1062 dev_pw, dev_pw_len); 1063 } 1064 } 1065 1066 1067 int wps_registrar_wps_cancel(struct wps_registrar *reg) 1068 { 1069 if (reg->pbc) { 1070 wpa_printf(MSG_DEBUG, "WPS: PBC is set - cancelling it"); 1071 wps_registrar_pbc_timeout(reg, NULL); 1072 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 1073 return 1; 1074 } else if (reg->selected_registrar) { 1075 /* PIN Method */ 1076 wpa_printf(MSG_DEBUG, "WPS: PIN is set - cancelling it"); 1077 wps_registrar_pin_completed(reg); 1078 wps_registrar_invalidate_wildcard_pin(reg, NULL, 0); 1079 return 1; 1080 } 1081 return 0; 1082 } 1083 1084 1085 /** 1086 * wps_registrar_probe_req_rx - Notify Registrar of Probe Request 1087 * @reg: Registrar data from wps_registrar_init() 1088 * @addr: MAC address of the Probe Request sender 1089 * @wps_data: WPS IE contents 1090 * 1091 * This function is called on an AP when a Probe Request with WPS IE is 1092 * received. This is used to track PBC mode use and to detect possible overlap 1093 * situation with other WPS APs. 1094 */ 1095 void wps_registrar_probe_req_rx(struct wps_registrar *reg, const u8 *addr, 1096 const struct wpabuf *wps_data, 1097 int p2p_wildcard) 1098 { 1099 struct wps_parse_attr attr; 1100 int skip_add = 0; 1101 1102 wpa_hexdump_buf(MSG_MSGDUMP, 1103 "WPS: Probe Request with WPS data received", 1104 wps_data); 1105 1106 if (wps_parse_msg(wps_data, &attr) < 0) 1107 return; 1108 1109 if (attr.config_methods == NULL) { 1110 wpa_printf(MSG_DEBUG, "WPS: No Config Methods attribute in " 1111 "Probe Request"); 1112 return; 1113 } 1114 1115 if (attr.dev_password_id == NULL) { 1116 wpa_printf(MSG_DEBUG, "WPS: No Device Password Id attribute " 1117 "in Probe Request"); 1118 return; 1119 } 1120 1121 if (reg->enrollee_seen_cb && attr.uuid_e && 1122 attr.primary_dev_type && attr.request_type && !p2p_wildcard) { 1123 char *dev_name = NULL; 1124 if (attr.dev_name) { 1125 dev_name = os_zalloc(attr.dev_name_len + 1); 1126 if (dev_name) { 1127 os_memcpy(dev_name, attr.dev_name, 1128 attr.dev_name_len); 1129 } 1130 } 1131 reg->enrollee_seen_cb(reg->cb_ctx, addr, attr.uuid_e, 1132 attr.primary_dev_type, 1133 WPA_GET_BE16(attr.config_methods), 1134 WPA_GET_BE16(attr.dev_password_id), 1135 *attr.request_type, dev_name); 1136 os_free(dev_name); 1137 } 1138 1139 if (WPA_GET_BE16(attr.dev_password_id) != DEV_PW_PUSHBUTTON) 1140 return; /* Not PBC */ 1141 1142 wpa_printf(MSG_DEBUG, "WPS: Probe Request for PBC received from " 1143 MACSTR, MAC2STR(addr)); 1144 if (attr.uuid_e == NULL) { 1145 wpa_printf(MSG_DEBUG, "WPS: Invalid Probe Request WPS IE: No " 1146 "UUID-E included"); 1147 return; 1148 } 1149 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E from Probe Request", attr.uuid_e, 1150 WPS_UUID_LEN); 1151 1152 #ifdef WPS_WORKAROUNDS 1153 if (reg->pbc_ignore_start.sec && 1154 os_memcmp(attr.uuid_e, reg->pbc_ignore_uuid, WPS_UUID_LEN) == 0) { 1155 struct os_reltime now, dur; 1156 os_get_reltime(&now); 1157 os_reltime_sub(&now, ®->pbc_ignore_start, &dur); 1158 if (dur.sec >= 0 && dur.sec < 5) { 1159 wpa_printf(MSG_DEBUG, "WPS: Ignore PBC activation " 1160 "based on Probe Request from the Enrollee " 1161 "that just completed PBC provisioning"); 1162 skip_add = 1; 1163 } else 1164 reg->pbc_ignore_start.sec = 0; 1165 } 1166 #endif /* WPS_WORKAROUNDS */ 1167 1168 if (!skip_add) 1169 wps_registrar_add_pbc_session(reg, addr, attr.uuid_e); 1170 if (wps_registrar_pbc_overlap(reg, addr, attr.uuid_e)) { 1171 wpa_printf(MSG_DEBUG, "WPS: PBC session overlap detected"); 1172 reg->force_pbc_overlap = 1; 1173 wps_pbc_overlap_event(reg->wps); 1174 } 1175 } 1176 1177 1178 int wps_cb_new_psk(struct wps_registrar *reg, const u8 *mac_addr, 1179 const u8 *p2p_dev_addr, const u8 *psk, size_t psk_len) 1180 { 1181 if (reg->new_psk_cb == NULL) 1182 return 0; 1183 1184 return reg->new_psk_cb(reg->cb_ctx, mac_addr, p2p_dev_addr, psk, 1185 psk_len); 1186 } 1187 1188 1189 static void wps_cb_pin_needed(struct wps_registrar *reg, const u8 *uuid_e, 1190 const struct wps_device_data *dev) 1191 { 1192 if (reg->pin_needed_cb == NULL) 1193 return; 1194 1195 reg->pin_needed_cb(reg->cb_ctx, uuid_e, dev); 1196 } 1197 1198 1199 static void wps_cb_reg_success(struct wps_registrar *reg, const u8 *mac_addr, 1200 const u8 *uuid_e, const u8 *dev_pw, 1201 size_t dev_pw_len) 1202 { 1203 if (reg->reg_success_cb == NULL) 1204 return; 1205 1206 reg->reg_success_cb(reg->cb_ctx, mac_addr, uuid_e, dev_pw, dev_pw_len); 1207 } 1208 1209 1210 static int wps_cb_set_ie(struct wps_registrar *reg, struct wpabuf *beacon_ie, 1211 struct wpabuf *probe_resp_ie) 1212 { 1213 return reg->set_ie_cb(reg->cb_ctx, beacon_ie, probe_resp_ie); 1214 } 1215 1216 1217 static void wps_cb_set_sel_reg(struct wps_registrar *reg) 1218 { 1219 u16 methods = 0; 1220 if (reg->set_sel_reg_cb == NULL) 1221 return; 1222 1223 if (reg->selected_registrar) { 1224 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 1225 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 1226 WPS_CONFIG_PHY_PUSHBUTTON); 1227 if (reg->pbc) 1228 wps_set_pushbutton(&methods, reg->wps->config_methods); 1229 } 1230 1231 wpa_printf(MSG_DEBUG, "WPS: wps_cb_set_sel_reg: sel_reg=%d " 1232 "config_methods=0x%x pbc=%d methods=0x%x", 1233 reg->selected_registrar, reg->wps->config_methods, 1234 reg->pbc, methods); 1235 1236 reg->set_sel_reg_cb(reg->cb_ctx, reg->selected_registrar, 1237 reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT, 1238 methods); 1239 } 1240 1241 1242 static int wps_set_ie(struct wps_registrar *reg) 1243 { 1244 struct wpabuf *beacon; 1245 struct wpabuf *probe; 1246 const u8 *auth_macs; 1247 size_t count; 1248 size_t vendor_len = 0; 1249 int i; 1250 1251 if (reg->set_ie_cb == NULL) 1252 return 0; 1253 1254 for (i = 0; i < MAX_WPS_VENDOR_EXTENSIONS; i++) { 1255 if (reg->wps->dev.vendor_ext[i]) { 1256 vendor_len += 2 + 2; 1257 vendor_len += wpabuf_len(reg->wps->dev.vendor_ext[i]); 1258 } 1259 } 1260 1261 beacon = wpabuf_alloc(400 + vendor_len); 1262 if (beacon == NULL) 1263 return -1; 1264 probe = wpabuf_alloc(500 + vendor_len); 1265 if (probe == NULL) { 1266 wpabuf_free(beacon); 1267 return -1; 1268 } 1269 1270 auth_macs = wps_authorized_macs(reg, &count); 1271 1272 wpa_printf(MSG_DEBUG, "WPS: Build Beacon IEs"); 1273 1274 if (wps_build_version(beacon) || 1275 wps_build_wps_state(reg->wps, beacon) || 1276 wps_build_ap_setup_locked(reg->wps, beacon) || 1277 wps_build_selected_registrar(reg, beacon) || 1278 wps_build_sel_reg_dev_password_id(reg, beacon) || 1279 wps_build_sel_reg_config_methods(reg, beacon) || 1280 wps_build_sel_pbc_reg_uuid_e(reg, beacon) || 1281 (reg->dualband && wps_build_rf_bands(®->wps->dev, beacon, 0)) || 1282 wps_build_wfa_ext(beacon, 0, auth_macs, count) || 1283 wps_build_vendor_ext(®->wps->dev, beacon)) { 1284 wpabuf_free(beacon); 1285 wpabuf_free(probe); 1286 return -1; 1287 } 1288 1289 #ifdef CONFIG_P2P 1290 if (wps_build_dev_name(®->wps->dev, beacon) || 1291 wps_build_primary_dev_type(®->wps->dev, beacon)) { 1292 wpabuf_free(beacon); 1293 wpabuf_free(probe); 1294 return -1; 1295 } 1296 #endif /* CONFIG_P2P */ 1297 1298 wpa_printf(MSG_DEBUG, "WPS: Build Probe Response IEs"); 1299 1300 if (wps_build_version(probe) || 1301 wps_build_wps_state(reg->wps, probe) || 1302 wps_build_ap_setup_locked(reg->wps, probe) || 1303 wps_build_selected_registrar(reg, probe) || 1304 wps_build_sel_reg_dev_password_id(reg, probe) || 1305 wps_build_sel_reg_config_methods(reg, probe) || 1306 wps_build_resp_type(probe, reg->wps->ap ? WPS_RESP_AP : 1307 WPS_RESP_REGISTRAR) || 1308 wps_build_uuid_e(probe, reg->wps->uuid) || 1309 wps_build_device_attrs(®->wps->dev, probe) || 1310 wps_build_probe_config_methods(reg, probe) || 1311 (reg->dualband && wps_build_rf_bands(®->wps->dev, probe, 0)) || 1312 wps_build_wfa_ext(probe, 0, auth_macs, count) || 1313 wps_build_vendor_ext(®->wps->dev, probe)) { 1314 wpabuf_free(beacon); 1315 wpabuf_free(probe); 1316 return -1; 1317 } 1318 1319 beacon = wps_ie_encapsulate(beacon); 1320 probe = wps_ie_encapsulate(probe); 1321 1322 if (!beacon || !probe) { 1323 wpabuf_free(beacon); 1324 wpabuf_free(probe); 1325 return -1; 1326 } 1327 1328 if (reg->static_wep_only) { 1329 /* 1330 * Windows XP and Vista clients can get confused about 1331 * EAP-Identity/Request when they probe the network with 1332 * EAPOL-Start. In such a case, they may assume the network is 1333 * using IEEE 802.1X and prompt user for a certificate while 1334 * the correct (non-WPS) behavior would be to ask for the 1335 * static WEP key. As a workaround, use Microsoft Provisioning 1336 * IE to advertise that legacy 802.1X is not supported. 1337 */ 1338 const u8 ms_wps[7] = { 1339 WLAN_EID_VENDOR_SPECIFIC, 5, 1340 /* Microsoft Provisioning IE (00:50:f2:5) */ 1341 0x00, 0x50, 0xf2, 5, 1342 0x00 /* no legacy 802.1X or MS WPS */ 1343 }; 1344 wpa_printf(MSG_DEBUG, "WPS: Add Microsoft Provisioning IE " 1345 "into Beacon/Probe Response frames"); 1346 wpabuf_put_data(beacon, ms_wps, sizeof(ms_wps)); 1347 wpabuf_put_data(probe, ms_wps, sizeof(ms_wps)); 1348 } 1349 1350 return wps_cb_set_ie(reg, beacon, probe); 1351 } 1352 1353 1354 static int wps_get_dev_password(struct wps_data *wps) 1355 { 1356 const u8 *pin; 1357 size_t pin_len = 0; 1358 1359 bin_clear_free(wps->dev_password, wps->dev_password_len); 1360 wps->dev_password = NULL; 1361 1362 if (wps->pbc) { 1363 wpa_printf(MSG_DEBUG, "WPS: Use default PIN for PBC"); 1364 pin = (const u8 *) "00000000"; 1365 pin_len = 8; 1366 #ifdef CONFIG_WPS_NFC 1367 } else if (wps->nfc_pw_token) { 1368 if (wps->nfc_pw_token->pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) 1369 { 1370 wpa_printf(MSG_DEBUG, "WPS: Using NFC connection " 1371 "handover and abbreviated WPS handshake " 1372 "without Device Password"); 1373 return 0; 1374 } 1375 wpa_printf(MSG_DEBUG, "WPS: Use OOB Device Password from NFC " 1376 "Password Token"); 1377 pin = wps->nfc_pw_token->dev_pw; 1378 pin_len = wps->nfc_pw_token->dev_pw_len; 1379 } else if (wps->dev_pw_id >= 0x10 && 1380 wps->wps->ap_nfc_dev_pw_id == wps->dev_pw_id && 1381 wps->wps->ap_nfc_dev_pw) { 1382 wpa_printf(MSG_DEBUG, "WPS: Use OOB Device Password from own NFC Password Token"); 1383 pin = wpabuf_head(wps->wps->ap_nfc_dev_pw); 1384 pin_len = wpabuf_len(wps->wps->ap_nfc_dev_pw); 1385 #endif /* CONFIG_WPS_NFC */ 1386 } else { 1387 pin = wps_registrar_get_pin(wps->wps->registrar, wps->uuid_e, 1388 &pin_len); 1389 if (pin && wps->dev_pw_id >= 0x10) { 1390 wpa_printf(MSG_DEBUG, "WPS: No match for OOB Device " 1391 "Password ID, but PIN found"); 1392 /* 1393 * See whether Enrollee is willing to use PIN instead. 1394 */ 1395 wps->dev_pw_id = DEV_PW_DEFAULT; 1396 } 1397 } 1398 if (pin == NULL) { 1399 wpa_printf(MSG_DEBUG, "WPS: No Device Password available for " 1400 "the Enrollee (context %p registrar %p)", 1401 wps->wps, wps->wps->registrar); 1402 wps_cb_pin_needed(wps->wps->registrar, wps->uuid_e, 1403 &wps->peer_dev); 1404 return -1; 1405 } 1406 1407 wps->dev_password = os_malloc(pin_len); 1408 if (wps->dev_password == NULL) 1409 return -1; 1410 os_memcpy(wps->dev_password, pin, pin_len); 1411 wps->dev_password_len = pin_len; 1412 1413 return 0; 1414 } 1415 1416 1417 static int wps_build_uuid_r(struct wps_data *wps, struct wpabuf *msg) 1418 { 1419 wpa_printf(MSG_DEBUG, "WPS: * UUID-R"); 1420 wpabuf_put_be16(msg, ATTR_UUID_R); 1421 wpabuf_put_be16(msg, WPS_UUID_LEN); 1422 wpabuf_put_data(msg, wps->uuid_r, WPS_UUID_LEN); 1423 return 0; 1424 } 1425 1426 1427 static int wps_build_r_hash(struct wps_data *wps, struct wpabuf *msg) 1428 { 1429 u8 *hash; 1430 const u8 *addr[4]; 1431 size_t len[4]; 1432 1433 if (random_get_bytes(wps->snonce, 2 * WPS_SECRET_NONCE_LEN) < 0) 1434 return -1; 1435 wpa_hexdump(MSG_DEBUG, "WPS: R-S1", wps->snonce, WPS_SECRET_NONCE_LEN); 1436 wpa_hexdump(MSG_DEBUG, "WPS: R-S2", 1437 wps->snonce + WPS_SECRET_NONCE_LEN, WPS_SECRET_NONCE_LEN); 1438 1439 if (wps->dh_pubkey_e == NULL || wps->dh_pubkey_r == NULL) { 1440 wpa_printf(MSG_DEBUG, "WPS: DH public keys not available for " 1441 "R-Hash derivation"); 1442 return -1; 1443 } 1444 1445 wpa_printf(MSG_DEBUG, "WPS: * R-Hash1"); 1446 wpabuf_put_be16(msg, ATTR_R_HASH1); 1447 wpabuf_put_be16(msg, SHA256_MAC_LEN); 1448 hash = wpabuf_put(msg, SHA256_MAC_LEN); 1449 /* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */ 1450 addr[0] = wps->snonce; 1451 len[0] = WPS_SECRET_NONCE_LEN; 1452 addr[1] = wps->psk1; 1453 len[1] = WPS_PSK_LEN; 1454 addr[2] = wpabuf_head(wps->dh_pubkey_e); 1455 len[2] = wpabuf_len(wps->dh_pubkey_e); 1456 addr[3] = wpabuf_head(wps->dh_pubkey_r); 1457 len[3] = wpabuf_len(wps->dh_pubkey_r); 1458 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 1459 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash1", hash, SHA256_MAC_LEN); 1460 1461 wpa_printf(MSG_DEBUG, "WPS: * R-Hash2"); 1462 wpabuf_put_be16(msg, ATTR_R_HASH2); 1463 wpabuf_put_be16(msg, SHA256_MAC_LEN); 1464 hash = wpabuf_put(msg, SHA256_MAC_LEN); 1465 /* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */ 1466 addr[0] = wps->snonce + WPS_SECRET_NONCE_LEN; 1467 addr[1] = wps->psk2; 1468 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 1469 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash2", hash, SHA256_MAC_LEN); 1470 1471 return 0; 1472 } 1473 1474 1475 static int wps_build_r_snonce1(struct wps_data *wps, struct wpabuf *msg) 1476 { 1477 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce1"); 1478 wpabuf_put_be16(msg, ATTR_R_SNONCE1); 1479 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN); 1480 wpabuf_put_data(msg, wps->snonce, WPS_SECRET_NONCE_LEN); 1481 return 0; 1482 } 1483 1484 1485 static int wps_build_r_snonce2(struct wps_data *wps, struct wpabuf *msg) 1486 { 1487 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce2"); 1488 wpabuf_put_be16(msg, ATTR_R_SNONCE2); 1489 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN); 1490 wpabuf_put_data(msg, wps->snonce + WPS_SECRET_NONCE_LEN, 1491 WPS_SECRET_NONCE_LEN); 1492 return 0; 1493 } 1494 1495 1496 static int wps_build_cred_network_idx(struct wpabuf *msg, 1497 const struct wps_credential *cred) 1498 { 1499 wpa_printf(MSG_DEBUG, "WPS: * Network Index (1)"); 1500 wpabuf_put_be16(msg, ATTR_NETWORK_INDEX); 1501 wpabuf_put_be16(msg, 1); 1502 wpabuf_put_u8(msg, 1); 1503 return 0; 1504 } 1505 1506 1507 static int wps_build_cred_ssid(struct wpabuf *msg, 1508 const struct wps_credential *cred) 1509 { 1510 wpa_printf(MSG_DEBUG, "WPS: * SSID"); 1511 wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID for Credential", 1512 cred->ssid, cred->ssid_len); 1513 wpabuf_put_be16(msg, ATTR_SSID); 1514 wpabuf_put_be16(msg, cred->ssid_len); 1515 wpabuf_put_data(msg, cred->ssid, cred->ssid_len); 1516 return 0; 1517 } 1518 1519 1520 static int wps_build_cred_auth_type(struct wpabuf *msg, 1521 const struct wps_credential *cred) 1522 { 1523 wpa_printf(MSG_DEBUG, "WPS: * Authentication Type (0x%x)", 1524 cred->auth_type); 1525 wpabuf_put_be16(msg, ATTR_AUTH_TYPE); 1526 wpabuf_put_be16(msg, 2); 1527 wpabuf_put_be16(msg, cred->auth_type); 1528 return 0; 1529 } 1530 1531 1532 static int wps_build_cred_encr_type(struct wpabuf *msg, 1533 const struct wps_credential *cred) 1534 { 1535 wpa_printf(MSG_DEBUG, "WPS: * Encryption Type (0x%x)", 1536 cred->encr_type); 1537 wpabuf_put_be16(msg, ATTR_ENCR_TYPE); 1538 wpabuf_put_be16(msg, 2); 1539 wpabuf_put_be16(msg, cred->encr_type); 1540 return 0; 1541 } 1542 1543 1544 static int wps_build_cred_network_key(struct wpabuf *msg, 1545 const struct wps_credential *cred) 1546 { 1547 wpa_printf(MSG_DEBUG, "WPS: * Network Key (len=%d)", 1548 (int) cred->key_len); 1549 wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key", 1550 cred->key, cred->key_len); 1551 wpabuf_put_be16(msg, ATTR_NETWORK_KEY); 1552 wpabuf_put_be16(msg, cred->key_len); 1553 wpabuf_put_data(msg, cred->key, cred->key_len); 1554 return 0; 1555 } 1556 1557 1558 static int wps_build_credential(struct wpabuf *msg, 1559 const struct wps_credential *cred) 1560 { 1561 if (wps_build_cred_network_idx(msg, cred) || 1562 wps_build_cred_ssid(msg, cred) || 1563 wps_build_cred_auth_type(msg, cred) || 1564 wps_build_cred_encr_type(msg, cred) || 1565 wps_build_cred_network_key(msg, cred) || 1566 wps_build_mac_addr(msg, cred->mac_addr)) 1567 return -1; 1568 return 0; 1569 } 1570 1571 1572 int wps_build_credential_wrap(struct wpabuf *msg, 1573 const struct wps_credential *cred) 1574 { 1575 struct wpabuf *wbuf; 1576 wbuf = wpabuf_alloc(200); 1577 if (wbuf == NULL) 1578 return -1; 1579 if (wps_build_credential(wbuf, cred)) { 1580 wpabuf_free(wbuf); 1581 return -1; 1582 } 1583 wpabuf_put_be16(msg, ATTR_CRED); 1584 wpabuf_put_be16(msg, wpabuf_len(wbuf)); 1585 wpabuf_put_buf(msg, wbuf); 1586 wpabuf_free(wbuf); 1587 return 0; 1588 } 1589 1590 1591 int wps_build_cred(struct wps_data *wps, struct wpabuf *msg) 1592 { 1593 struct wpabuf *cred; 1594 1595 if (wps->wps->registrar->skip_cred_build) 1596 goto skip_cred_build; 1597 1598 wpa_printf(MSG_DEBUG, "WPS: * Credential"); 1599 if (wps->use_cred) { 1600 os_memcpy(&wps->cred, wps->use_cred, sizeof(wps->cred)); 1601 goto use_provided; 1602 } 1603 os_memset(&wps->cred, 0, sizeof(wps->cred)); 1604 1605 os_memcpy(wps->cred.ssid, wps->wps->ssid, wps->wps->ssid_len); 1606 wps->cred.ssid_len = wps->wps->ssid_len; 1607 1608 /* Select the best authentication and encryption type */ 1609 if (wps->auth_type & WPS_AUTH_WPA2PSK) 1610 wps->auth_type = WPS_AUTH_WPA2PSK; 1611 else if (wps->auth_type & WPS_AUTH_WPAPSK) 1612 wps->auth_type = WPS_AUTH_WPAPSK; 1613 else if (wps->auth_type & WPS_AUTH_OPEN) 1614 wps->auth_type = WPS_AUTH_OPEN; 1615 else { 1616 wpa_printf(MSG_DEBUG, "WPS: Unsupported auth_type 0x%x", 1617 wps->auth_type); 1618 return -1; 1619 } 1620 wps->cred.auth_type = wps->auth_type; 1621 1622 if (wps->auth_type == WPS_AUTH_WPA2PSK || 1623 wps->auth_type == WPS_AUTH_WPAPSK) { 1624 if (wps->encr_type & WPS_ENCR_AES) 1625 wps->encr_type = WPS_ENCR_AES; 1626 else if (wps->encr_type & WPS_ENCR_TKIP) 1627 wps->encr_type = WPS_ENCR_TKIP; 1628 else { 1629 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption " 1630 "type for WPA/WPA2"); 1631 return -1; 1632 } 1633 } else { 1634 if (wps->encr_type & WPS_ENCR_NONE) 1635 wps->encr_type = WPS_ENCR_NONE; 1636 #ifdef CONFIG_TESTING_OPTIONS 1637 else if (wps->encr_type & WPS_ENCR_WEP) 1638 wps->encr_type = WPS_ENCR_WEP; 1639 #endif /* CONFIG_TESTING_OPTIONS */ 1640 else { 1641 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption " 1642 "type for non-WPA/WPA2 mode"); 1643 return -1; 1644 } 1645 } 1646 wps->cred.encr_type = wps->encr_type; 1647 /* 1648 * Set MAC address in the Credential to be the Enrollee's MAC address 1649 */ 1650 os_memcpy(wps->cred.mac_addr, wps->mac_addr_e, ETH_ALEN); 1651 1652 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->wps->ap && 1653 !wps->wps->registrar->disable_auto_conf) { 1654 u8 r[16]; 1655 /* Generate a random passphrase */ 1656 if (random_pool_ready() != 1 || 1657 random_get_bytes(r, sizeof(r)) < 0) { 1658 wpa_printf(MSG_INFO, 1659 "WPS: Could not generate random PSK"); 1660 return -1; 1661 } 1662 os_free(wps->new_psk); 1663 wps->new_psk = base64_encode(r, sizeof(r), &wps->new_psk_len); 1664 if (wps->new_psk == NULL) 1665 return -1; 1666 wps->new_psk_len--; /* remove newline */ 1667 while (wps->new_psk_len && 1668 wps->new_psk[wps->new_psk_len - 1] == '=') 1669 wps->new_psk_len--; 1670 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Generated passphrase", 1671 wps->new_psk, wps->new_psk_len); 1672 os_memcpy(wps->cred.key, wps->new_psk, wps->new_psk_len); 1673 wps->cred.key_len = wps->new_psk_len; 1674 } else if (!wps->wps->registrar->force_per_enrollee_psk && 1675 wps->use_psk_key && wps->wps->psk_set) { 1676 char hex[65]; 1677 wpa_printf(MSG_DEBUG, "WPS: Use PSK format for Network Key"); 1678 wpa_snprintf_hex(hex, sizeof(hex), wps->wps->psk, 32); 1679 os_memcpy(wps->cred.key, hex, 32 * 2); 1680 wps->cred.key_len = 32 * 2; 1681 } else if (!wps->wps->registrar->force_per_enrollee_psk && 1682 wps->wps->network_key) { 1683 os_memcpy(wps->cred.key, wps->wps->network_key, 1684 wps->wps->network_key_len); 1685 wps->cred.key_len = wps->wps->network_key_len; 1686 } else if (wps->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) { 1687 char hex[65]; 1688 /* Generate a random per-device PSK */ 1689 os_free(wps->new_psk); 1690 wps->new_psk_len = 32; 1691 wps->new_psk = os_malloc(wps->new_psk_len); 1692 if (wps->new_psk == NULL) 1693 return -1; 1694 if (random_pool_ready() != 1 || 1695 random_get_bytes(wps->new_psk, wps->new_psk_len) < 0) { 1696 wpa_printf(MSG_INFO, 1697 "WPS: Could not generate random PSK"); 1698 os_free(wps->new_psk); 1699 wps->new_psk = NULL; 1700 return -1; 1701 } 1702 wpa_hexdump_key(MSG_DEBUG, "WPS: Generated per-device PSK", 1703 wps->new_psk, wps->new_psk_len); 1704 wpa_snprintf_hex(hex, sizeof(hex), wps->new_psk, 1705 wps->new_psk_len); 1706 os_memcpy(wps->cred.key, hex, wps->new_psk_len * 2); 1707 wps->cred.key_len = wps->new_psk_len * 2; 1708 } 1709 1710 use_provided: 1711 #ifdef CONFIG_WPS_TESTING 1712 if (wps_testing_dummy_cred) 1713 cred = wpabuf_alloc(200); 1714 else 1715 cred = NULL; 1716 if (cred) { 1717 struct wps_credential dummy; 1718 wpa_printf(MSG_DEBUG, "WPS: Add dummy credential"); 1719 os_memset(&dummy, 0, sizeof(dummy)); 1720 os_memcpy(dummy.ssid, "dummy", 5); 1721 dummy.ssid_len = 5; 1722 dummy.auth_type = WPS_AUTH_WPA2PSK; 1723 dummy.encr_type = WPS_ENCR_AES; 1724 os_memcpy(dummy.key, "dummy psk", 9); 1725 dummy.key_len = 9; 1726 os_memcpy(dummy.mac_addr, wps->mac_addr_e, ETH_ALEN); 1727 wps_build_credential(cred, &dummy); 1728 wpa_hexdump_buf(MSG_DEBUG, "WPS: Dummy Credential", cred); 1729 1730 wpabuf_put_be16(msg, ATTR_CRED); 1731 wpabuf_put_be16(msg, wpabuf_len(cred)); 1732 wpabuf_put_buf(msg, cred); 1733 1734 wpabuf_free(cred); 1735 } 1736 #endif /* CONFIG_WPS_TESTING */ 1737 1738 cred = wpabuf_alloc(200); 1739 if (cred == NULL) 1740 return -1; 1741 1742 if (wps_build_credential(cred, &wps->cred)) { 1743 wpabuf_free(cred); 1744 return -1; 1745 } 1746 1747 wpabuf_put_be16(msg, ATTR_CRED); 1748 wpabuf_put_be16(msg, wpabuf_len(cred)); 1749 wpabuf_put_buf(msg, cred); 1750 wpabuf_free(cred); 1751 1752 skip_cred_build: 1753 if (wps->wps->registrar->extra_cred) { 1754 wpa_printf(MSG_DEBUG, "WPS: * Credential (pre-configured)"); 1755 wpabuf_put_buf(msg, wps->wps->registrar->extra_cred); 1756 } 1757 1758 return 0; 1759 } 1760 1761 1762 static int wps_build_ap_settings(struct wps_data *wps, struct wpabuf *msg) 1763 { 1764 wpa_printf(MSG_DEBUG, "WPS: * AP Settings"); 1765 1766 if (wps_build_credential(msg, &wps->cred)) 1767 return -1; 1768 1769 return 0; 1770 } 1771 1772 1773 static struct wpabuf * wps_build_ap_cred(struct wps_data *wps) 1774 { 1775 struct wpabuf *msg, *plain; 1776 1777 msg = wpabuf_alloc(1000); 1778 if (msg == NULL) 1779 return NULL; 1780 1781 plain = wpabuf_alloc(200); 1782 if (plain == NULL) { 1783 wpabuf_free(msg); 1784 return NULL; 1785 } 1786 1787 if (wps_build_ap_settings(wps, plain)) { 1788 wpabuf_free(plain); 1789 wpabuf_free(msg); 1790 return NULL; 1791 } 1792 1793 wpabuf_put_be16(msg, ATTR_CRED); 1794 wpabuf_put_be16(msg, wpabuf_len(plain)); 1795 wpabuf_put_buf(msg, plain); 1796 wpabuf_free(plain); 1797 1798 return msg; 1799 } 1800 1801 1802 static struct wpabuf * wps_build_m2(struct wps_data *wps) 1803 { 1804 struct wpabuf *msg; 1805 int config_in_m2 = 0; 1806 1807 if (random_get_bytes(wps->nonce_r, WPS_NONCE_LEN) < 0) 1808 return NULL; 1809 wpa_hexdump(MSG_DEBUG, "WPS: Registrar Nonce", 1810 wps->nonce_r, WPS_NONCE_LEN); 1811 wpa_hexdump(MSG_DEBUG, "WPS: UUID-R", wps->uuid_r, WPS_UUID_LEN); 1812 1813 wpa_printf(MSG_DEBUG, "WPS: Building Message M2"); 1814 msg = wpabuf_alloc(1000); 1815 if (msg == NULL) 1816 return NULL; 1817 1818 if (wps_build_version(msg) || 1819 wps_build_msg_type(msg, WPS_M2) || 1820 wps_build_enrollee_nonce(wps, msg) || 1821 wps_build_registrar_nonce(wps, msg) || 1822 wps_build_uuid_r(wps, msg) || 1823 wps_build_public_key(wps, msg) || 1824 wps_derive_keys(wps) || 1825 wps_build_auth_type_flags(wps, msg) || 1826 wps_build_encr_type_flags(wps, msg) || 1827 wps_build_conn_type_flags(wps, msg) || 1828 wps_build_config_methods_r(wps->wps->registrar, msg) || 1829 wps_build_device_attrs(&wps->wps->dev, msg) || 1830 wps_build_rf_bands(&wps->wps->dev, msg, 1831 wps->wps->rf_band_cb(wps->wps->cb_ctx)) || 1832 wps_build_assoc_state(wps, msg) || 1833 wps_build_config_error(msg, WPS_CFG_NO_ERROR) || 1834 wps_build_dev_password_id(msg, wps->dev_pw_id) || 1835 wps_build_os_version(&wps->wps->dev, msg) || 1836 wps_build_wfa_ext(msg, 0, NULL, 0)) { 1837 wpabuf_free(msg); 1838 return NULL; 1839 } 1840 1841 #ifdef CONFIG_WPS_NFC 1842 if (wps->nfc_pw_token && wps->nfc_pw_token->pk_hash_provided_oob && 1843 wps->nfc_pw_token->pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) { 1844 /* 1845 * Use abbreviated handshake since public key hash allowed 1846 * Enrollee to validate our public key similarly to how Enrollee 1847 * public key was validated. There is no need to validate Device 1848 * Password in this case. 1849 */ 1850 struct wpabuf *plain = wpabuf_alloc(500); 1851 if (plain == NULL || 1852 wps_build_cred(wps, plain) || 1853 wps_build_key_wrap_auth(wps, plain) || 1854 wps_build_encr_settings(wps, msg, plain)) { 1855 wpabuf_free(msg); 1856 wpabuf_free(plain); 1857 return NULL; 1858 } 1859 wpabuf_free(plain); 1860 config_in_m2 = 1; 1861 } 1862 #endif /* CONFIG_WPS_NFC */ 1863 1864 if (wps_build_authenticator(wps, msg)) { 1865 wpabuf_free(msg); 1866 return NULL; 1867 } 1868 1869 wps->int_reg = 1; 1870 wps->state = config_in_m2 ? RECV_DONE : RECV_M3; 1871 return msg; 1872 } 1873 1874 1875 static struct wpabuf * wps_build_m2d(struct wps_data *wps) 1876 { 1877 struct wpabuf *msg; 1878 u16 err = wps->config_error; 1879 1880 wpa_printf(MSG_DEBUG, "WPS: Building Message M2D"); 1881 msg = wpabuf_alloc(1000); 1882 if (msg == NULL) 1883 return NULL; 1884 1885 if (wps->wps->ap && wps->wps->ap_setup_locked && 1886 err == WPS_CFG_NO_ERROR) 1887 err = WPS_CFG_SETUP_LOCKED; 1888 1889 if (wps_build_version(msg) || 1890 wps_build_msg_type(msg, WPS_M2D) || 1891 wps_build_enrollee_nonce(wps, msg) || 1892 wps_build_registrar_nonce(wps, msg) || 1893 wps_build_uuid_r(wps, msg) || 1894 wps_build_auth_type_flags(wps, msg) || 1895 wps_build_encr_type_flags(wps, msg) || 1896 wps_build_conn_type_flags(wps, msg) || 1897 wps_build_config_methods_r(wps->wps->registrar, msg) || 1898 wps_build_device_attrs(&wps->wps->dev, msg) || 1899 wps_build_rf_bands(&wps->wps->dev, msg, 1900 wps->wps->rf_band_cb(wps->wps->cb_ctx)) || 1901 wps_build_assoc_state(wps, msg) || 1902 wps_build_config_error(msg, err) || 1903 wps_build_os_version(&wps->wps->dev, msg) || 1904 wps_build_wfa_ext(msg, 0, NULL, 0)) { 1905 wpabuf_free(msg); 1906 return NULL; 1907 } 1908 1909 wps->state = RECV_M2D_ACK; 1910 return msg; 1911 } 1912 1913 1914 static struct wpabuf * wps_build_m4(struct wps_data *wps) 1915 { 1916 struct wpabuf *msg, *plain; 1917 1918 wpa_printf(MSG_DEBUG, "WPS: Building Message M4"); 1919 1920 wps_derive_psk(wps, wps->dev_password, wps->dev_password_len); 1921 1922 plain = wpabuf_alloc(200); 1923 if (plain == NULL) 1924 return NULL; 1925 1926 msg = wpabuf_alloc(1000); 1927 if (msg == NULL) { 1928 wpabuf_free(plain); 1929 return NULL; 1930 } 1931 1932 if (wps_build_version(msg) || 1933 wps_build_msg_type(msg, WPS_M4) || 1934 wps_build_enrollee_nonce(wps, msg) || 1935 wps_build_r_hash(wps, msg) || 1936 wps_build_r_snonce1(wps, plain) || 1937 wps_build_key_wrap_auth(wps, plain) || 1938 wps_build_encr_settings(wps, msg, plain) || 1939 wps_build_wfa_ext(msg, 0, NULL, 0) || 1940 wps_build_authenticator(wps, msg)) { 1941 wpabuf_free(plain); 1942 wpabuf_free(msg); 1943 return NULL; 1944 } 1945 wpabuf_free(plain); 1946 1947 wps->state = RECV_M5; 1948 return msg; 1949 } 1950 1951 1952 static struct wpabuf * wps_build_m6(struct wps_data *wps) 1953 { 1954 struct wpabuf *msg, *plain; 1955 1956 wpa_printf(MSG_DEBUG, "WPS: Building Message M6"); 1957 1958 plain = wpabuf_alloc(200); 1959 if (plain == NULL) 1960 return NULL; 1961 1962 msg = wpabuf_alloc(1000); 1963 if (msg == NULL) { 1964 wpabuf_free(plain); 1965 return NULL; 1966 } 1967 1968 if (wps_build_version(msg) || 1969 wps_build_msg_type(msg, WPS_M6) || 1970 wps_build_enrollee_nonce(wps, msg) || 1971 wps_build_r_snonce2(wps, plain) || 1972 wps_build_key_wrap_auth(wps, plain) || 1973 wps_build_encr_settings(wps, msg, plain) || 1974 wps_build_wfa_ext(msg, 0, NULL, 0) || 1975 wps_build_authenticator(wps, msg)) { 1976 wpabuf_free(plain); 1977 wpabuf_free(msg); 1978 return NULL; 1979 } 1980 wpabuf_free(plain); 1981 1982 wps->wps_pin_revealed = 1; 1983 wps->state = RECV_M7; 1984 return msg; 1985 } 1986 1987 1988 static struct wpabuf * wps_build_m8(struct wps_data *wps) 1989 { 1990 struct wpabuf *msg, *plain; 1991 1992 wpa_printf(MSG_DEBUG, "WPS: Building Message M8"); 1993 1994 plain = wpabuf_alloc(500); 1995 if (plain == NULL) 1996 return NULL; 1997 1998 msg = wpabuf_alloc(1000); 1999 if (msg == NULL) { 2000 wpabuf_free(plain); 2001 return NULL; 2002 } 2003 2004 if (wps_build_version(msg) || 2005 wps_build_msg_type(msg, WPS_M8) || 2006 wps_build_enrollee_nonce(wps, msg) || 2007 ((wps->wps->ap || wps->er) && wps_build_cred(wps, plain)) || 2008 (!wps->wps->ap && !wps->er && wps_build_ap_settings(wps, plain)) || 2009 wps_build_key_wrap_auth(wps, plain) || 2010 wps_build_encr_settings(wps, msg, plain) || 2011 wps_build_wfa_ext(msg, 0, NULL, 0) || 2012 wps_build_authenticator(wps, msg)) { 2013 wpabuf_free(plain); 2014 wpabuf_free(msg); 2015 return NULL; 2016 } 2017 wpabuf_free(plain); 2018 2019 wps->state = RECV_DONE; 2020 return msg; 2021 } 2022 2023 2024 struct wpabuf * wps_registrar_get_msg(struct wps_data *wps, 2025 enum wsc_op_code *op_code) 2026 { 2027 struct wpabuf *msg; 2028 2029 #ifdef CONFIG_WPS_UPNP 2030 if (!wps->int_reg && wps->wps->wps_upnp) { 2031 struct upnp_pending_message *p, *prev = NULL; 2032 if (wps->ext_reg > 1) 2033 wps_registrar_free_pending_m2(wps->wps); 2034 p = wps->wps->upnp_msgs; 2035 /* TODO: check pending message MAC address */ 2036 while (p && p->next) { 2037 prev = p; 2038 p = p->next; 2039 } 2040 if (p) { 2041 wpa_printf(MSG_DEBUG, "WPS: Use pending message from " 2042 "UPnP"); 2043 if (prev) 2044 prev->next = NULL; 2045 else 2046 wps->wps->upnp_msgs = NULL; 2047 msg = p->msg; 2048 switch (p->type) { 2049 case WPS_WSC_ACK: 2050 *op_code = WSC_ACK; 2051 break; 2052 case WPS_WSC_NACK: 2053 *op_code = WSC_NACK; 2054 break; 2055 default: 2056 *op_code = WSC_MSG; 2057 break; 2058 } 2059 os_free(p); 2060 if (wps->ext_reg == 0) 2061 wps->ext_reg = 1; 2062 return msg; 2063 } 2064 } 2065 if (wps->ext_reg) { 2066 wpa_printf(MSG_DEBUG, "WPS: Using external Registrar, but no " 2067 "pending message available"); 2068 return NULL; 2069 } 2070 #endif /* CONFIG_WPS_UPNP */ 2071 2072 switch (wps->state) { 2073 case SEND_M2: 2074 if (wps_get_dev_password(wps) < 0) 2075 msg = wps_build_m2d(wps); 2076 else 2077 msg = wps_build_m2(wps); 2078 *op_code = WSC_MSG; 2079 break; 2080 case SEND_M2D: 2081 msg = wps_build_m2d(wps); 2082 *op_code = WSC_MSG; 2083 break; 2084 case SEND_M4: 2085 msg = wps_build_m4(wps); 2086 *op_code = WSC_MSG; 2087 break; 2088 case SEND_M6: 2089 msg = wps_build_m6(wps); 2090 *op_code = WSC_MSG; 2091 break; 2092 case SEND_M8: 2093 msg = wps_build_m8(wps); 2094 *op_code = WSC_MSG; 2095 break; 2096 case RECV_DONE: 2097 msg = wps_build_wsc_ack(wps); 2098 *op_code = WSC_ACK; 2099 break; 2100 case SEND_WSC_NACK: 2101 msg = wps_build_wsc_nack(wps); 2102 *op_code = WSC_NACK; 2103 break; 2104 default: 2105 wpa_printf(MSG_DEBUG, "WPS: Unsupported state %d for building " 2106 "a message", wps->state); 2107 msg = NULL; 2108 break; 2109 } 2110 2111 if (*op_code == WSC_MSG && msg) { 2112 /* Save a copy of the last message for Authenticator derivation 2113 */ 2114 wpabuf_free(wps->last_msg); 2115 wps->last_msg = wpabuf_dup(msg); 2116 } 2117 2118 return msg; 2119 } 2120 2121 2122 static int wps_process_enrollee_nonce(struct wps_data *wps, const u8 *e_nonce) 2123 { 2124 if (e_nonce == NULL) { 2125 wpa_printf(MSG_DEBUG, "WPS: No Enrollee Nonce received"); 2126 return -1; 2127 } 2128 2129 os_memcpy(wps->nonce_e, e_nonce, WPS_NONCE_LEN); 2130 wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce", 2131 wps->nonce_e, WPS_NONCE_LEN); 2132 2133 return 0; 2134 } 2135 2136 2137 static int wps_process_registrar_nonce(struct wps_data *wps, const u8 *r_nonce) 2138 { 2139 if (r_nonce == NULL) { 2140 wpa_printf(MSG_DEBUG, "WPS: No Registrar Nonce received"); 2141 return -1; 2142 } 2143 2144 if (os_memcmp(wps->nonce_r, r_nonce, WPS_NONCE_LEN) != 0) { 2145 wpa_printf(MSG_DEBUG, "WPS: Invalid Registrar Nonce received"); 2146 return -1; 2147 } 2148 2149 return 0; 2150 } 2151 2152 2153 static int wps_process_uuid_e(struct wps_data *wps, const u8 *uuid_e) 2154 { 2155 if (uuid_e == NULL) { 2156 wpa_printf(MSG_DEBUG, "WPS: No UUID-E received"); 2157 return -1; 2158 } 2159 2160 os_memcpy(wps->uuid_e, uuid_e, WPS_UUID_LEN); 2161 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", wps->uuid_e, WPS_UUID_LEN); 2162 2163 return 0; 2164 } 2165 2166 2167 static int wps_process_dev_password_id(struct wps_data *wps, const u8 *pw_id) 2168 { 2169 if (pw_id == NULL) { 2170 wpa_printf(MSG_DEBUG, "WPS: No Device Password ID received"); 2171 return -1; 2172 } 2173 2174 wps->dev_pw_id = WPA_GET_BE16(pw_id); 2175 wpa_printf(MSG_DEBUG, "WPS: Device Password ID %d", wps->dev_pw_id); 2176 2177 return 0; 2178 } 2179 2180 2181 static int wps_process_e_hash1(struct wps_data *wps, const u8 *e_hash1) 2182 { 2183 if (e_hash1 == NULL) { 2184 wpa_printf(MSG_DEBUG, "WPS: No E-Hash1 received"); 2185 return -1; 2186 } 2187 2188 os_memcpy(wps->peer_hash1, e_hash1, WPS_HASH_LEN); 2189 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash1", wps->peer_hash1, WPS_HASH_LEN); 2190 2191 return 0; 2192 } 2193 2194 2195 static int wps_process_e_hash2(struct wps_data *wps, const u8 *e_hash2) 2196 { 2197 if (e_hash2 == NULL) { 2198 wpa_printf(MSG_DEBUG, "WPS: No E-Hash2 received"); 2199 return -1; 2200 } 2201 2202 os_memcpy(wps->peer_hash2, e_hash2, WPS_HASH_LEN); 2203 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash2", wps->peer_hash2, WPS_HASH_LEN); 2204 2205 return 0; 2206 } 2207 2208 2209 static int wps_process_e_snonce1(struct wps_data *wps, const u8 *e_snonce1) 2210 { 2211 u8 hash[SHA256_MAC_LEN]; 2212 const u8 *addr[4]; 2213 size_t len[4]; 2214 2215 if (e_snonce1 == NULL) { 2216 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce1 received"); 2217 return -1; 2218 } 2219 2220 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce1", e_snonce1, 2221 WPS_SECRET_NONCE_LEN); 2222 2223 /* E-Hash1 = HMAC_AuthKey(E-S1 || PSK1 || PK_E || PK_R) */ 2224 addr[0] = e_snonce1; 2225 len[0] = WPS_SECRET_NONCE_LEN; 2226 addr[1] = wps->psk1; 2227 len[1] = WPS_PSK_LEN; 2228 addr[2] = wpabuf_head(wps->dh_pubkey_e); 2229 len[2] = wpabuf_len(wps->dh_pubkey_e); 2230 addr[3] = wpabuf_head(wps->dh_pubkey_r); 2231 len[3] = wpabuf_len(wps->dh_pubkey_r); 2232 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 2233 2234 if (os_memcmp_const(wps->peer_hash1, hash, WPS_HASH_LEN) != 0) { 2235 wpa_printf(MSG_DEBUG, "WPS: E-Hash1 derived from E-S1 does " 2236 "not match with the pre-committed value"); 2237 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE; 2238 wps_pwd_auth_fail_event(wps->wps, 0, 1, wps->mac_addr_e); 2239 return -1; 2240 } 2241 2242 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the first " 2243 "half of the device password"); 2244 2245 return 0; 2246 } 2247 2248 2249 static int wps_process_e_snonce2(struct wps_data *wps, const u8 *e_snonce2) 2250 { 2251 u8 hash[SHA256_MAC_LEN]; 2252 const u8 *addr[4]; 2253 size_t len[4]; 2254 2255 if (e_snonce2 == NULL) { 2256 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce2 received"); 2257 return -1; 2258 } 2259 2260 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce2", e_snonce2, 2261 WPS_SECRET_NONCE_LEN); 2262 2263 /* E-Hash2 = HMAC_AuthKey(E-S2 || PSK2 || PK_E || PK_R) */ 2264 addr[0] = e_snonce2; 2265 len[0] = WPS_SECRET_NONCE_LEN; 2266 addr[1] = wps->psk2; 2267 len[1] = WPS_PSK_LEN; 2268 addr[2] = wpabuf_head(wps->dh_pubkey_e); 2269 len[2] = wpabuf_len(wps->dh_pubkey_e); 2270 addr[3] = wpabuf_head(wps->dh_pubkey_r); 2271 len[3] = wpabuf_len(wps->dh_pubkey_r); 2272 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 2273 2274 if (os_memcmp_const(wps->peer_hash2, hash, WPS_HASH_LEN) != 0) { 2275 wpa_printf(MSG_DEBUG, "WPS: E-Hash2 derived from E-S2 does " 2276 "not match with the pre-committed value"); 2277 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e); 2278 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE; 2279 wps_pwd_auth_fail_event(wps->wps, 0, 2, wps->mac_addr_e); 2280 return -1; 2281 } 2282 2283 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the second " 2284 "half of the device password"); 2285 wps->wps_pin_revealed = 0; 2286 wps_registrar_unlock_pin(wps->wps->registrar, wps->uuid_e); 2287 2288 /* 2289 * In case wildcard PIN is used and WPS handshake succeeds in the first 2290 * attempt, wps_registrar_unlock_pin() would not free the PIN, so make 2291 * sure the PIN gets invalidated here. 2292 */ 2293 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e); 2294 2295 return 0; 2296 } 2297 2298 2299 static int wps_process_mac_addr(struct wps_data *wps, const u8 *mac_addr) 2300 { 2301 if (mac_addr == NULL) { 2302 wpa_printf(MSG_DEBUG, "WPS: No MAC Address received"); 2303 return -1; 2304 } 2305 2306 wpa_printf(MSG_DEBUG, "WPS: Enrollee MAC Address " MACSTR, 2307 MAC2STR(mac_addr)); 2308 os_memcpy(wps->mac_addr_e, mac_addr, ETH_ALEN); 2309 os_memcpy(wps->peer_dev.mac_addr, mac_addr, ETH_ALEN); 2310 2311 return 0; 2312 } 2313 2314 2315 static int wps_process_pubkey(struct wps_data *wps, const u8 *pk, 2316 size_t pk_len) 2317 { 2318 if (pk == NULL || pk_len == 0) { 2319 wpa_printf(MSG_DEBUG, "WPS: No Public Key received"); 2320 return -1; 2321 } 2322 2323 wpabuf_free(wps->dh_pubkey_e); 2324 wps->dh_pubkey_e = wpabuf_alloc_copy(pk, pk_len); 2325 if (wps->dh_pubkey_e == NULL) 2326 return -1; 2327 2328 return 0; 2329 } 2330 2331 2332 static int wps_process_auth_type_flags(struct wps_data *wps, const u8 *auth) 2333 { 2334 u16 auth_types; 2335 2336 if (auth == NULL) { 2337 wpa_printf(MSG_DEBUG, "WPS: No Authentication Type flags " 2338 "received"); 2339 return -1; 2340 } 2341 2342 auth_types = WPA_GET_BE16(auth); 2343 2344 wpa_printf(MSG_DEBUG, "WPS: Enrollee Authentication Type flags 0x%x", 2345 auth_types); 2346 wps->auth_type = wps->wps->auth_types & auth_types; 2347 if (wps->auth_type == 0) { 2348 wpa_printf(MSG_DEBUG, "WPS: No match in supported " 2349 "authentication types (own 0x%x Enrollee 0x%x)", 2350 wps->wps->auth_types, auth_types); 2351 #ifdef WPS_WORKAROUNDS 2352 /* 2353 * Some deployed implementations seem to advertise incorrect 2354 * information in this attribute. For example, Linksys WRT350N 2355 * seems to have a byteorder bug that breaks this negotiation. 2356 * In order to interoperate with existing implementations, 2357 * assume that the Enrollee supports everything we do. 2358 */ 2359 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee " 2360 "does not advertise supported authentication types " 2361 "correctly"); 2362 wps->auth_type = wps->wps->auth_types; 2363 #else /* WPS_WORKAROUNDS */ 2364 return -1; 2365 #endif /* WPS_WORKAROUNDS */ 2366 } 2367 2368 return 0; 2369 } 2370 2371 2372 static int wps_process_encr_type_flags(struct wps_data *wps, const u8 *encr) 2373 { 2374 u16 encr_types; 2375 2376 if (encr == NULL) { 2377 wpa_printf(MSG_DEBUG, "WPS: No Encryption Type flags " 2378 "received"); 2379 return -1; 2380 } 2381 2382 encr_types = WPA_GET_BE16(encr); 2383 2384 wpa_printf(MSG_DEBUG, "WPS: Enrollee Encryption Type flags 0x%x", 2385 encr_types); 2386 wps->encr_type = wps->wps->encr_types & encr_types; 2387 if (wps->encr_type == 0) { 2388 wpa_printf(MSG_DEBUG, "WPS: No match in supported " 2389 "encryption types (own 0x%x Enrollee 0x%x)", 2390 wps->wps->encr_types, encr_types); 2391 #ifdef WPS_WORKAROUNDS 2392 /* 2393 * Some deployed implementations seem to advertise incorrect 2394 * information in this attribute. For example, Linksys WRT350N 2395 * seems to have a byteorder bug that breaks this negotiation. 2396 * In order to interoperate with existing implementations, 2397 * assume that the Enrollee supports everything we do. 2398 */ 2399 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee " 2400 "does not advertise supported encryption types " 2401 "correctly"); 2402 wps->encr_type = wps->wps->encr_types; 2403 #else /* WPS_WORKAROUNDS */ 2404 return -1; 2405 #endif /* WPS_WORKAROUNDS */ 2406 } 2407 2408 return 0; 2409 } 2410 2411 2412 static int wps_process_conn_type_flags(struct wps_data *wps, const u8 *conn) 2413 { 2414 if (conn == NULL) { 2415 wpa_printf(MSG_DEBUG, "WPS: No Connection Type flags " 2416 "received"); 2417 return -1; 2418 } 2419 2420 wpa_printf(MSG_DEBUG, "WPS: Enrollee Connection Type flags 0x%x", 2421 *conn); 2422 2423 return 0; 2424 } 2425 2426 2427 static int wps_process_config_methods(struct wps_data *wps, const u8 *methods) 2428 { 2429 u16 m; 2430 2431 if (methods == NULL) { 2432 wpa_printf(MSG_DEBUG, "WPS: No Config Methods received"); 2433 return -1; 2434 } 2435 2436 m = WPA_GET_BE16(methods); 2437 2438 wpa_printf(MSG_DEBUG, "WPS: Enrollee Config Methods 0x%x" 2439 "%s%s%s%s%s%s%s%s%s", m, 2440 m & WPS_CONFIG_USBA ? " [USBA]" : "", 2441 m & WPS_CONFIG_ETHERNET ? " [Ethernet]" : "", 2442 m & WPS_CONFIG_LABEL ? " [Label]" : "", 2443 m & WPS_CONFIG_DISPLAY ? " [Display]" : "", 2444 m & WPS_CONFIG_EXT_NFC_TOKEN ? " [Ext NFC Token]" : "", 2445 m & WPS_CONFIG_INT_NFC_TOKEN ? " [Int NFC Token]" : "", 2446 m & WPS_CONFIG_NFC_INTERFACE ? " [NFC]" : "", 2447 m & WPS_CONFIG_PUSHBUTTON ? " [PBC]" : "", 2448 m & WPS_CONFIG_KEYPAD ? " [Keypad]" : ""); 2449 2450 if (!(m & WPS_CONFIG_DISPLAY) && !wps->use_psk_key) { 2451 /* 2452 * The Enrollee does not have a display so it is unlikely to be 2453 * able to show the passphrase to a user and as such, could 2454 * benefit from receiving PSK to reduce key derivation time. 2455 */ 2456 wpa_printf(MSG_DEBUG, "WPS: Prefer PSK format key due to " 2457 "Enrollee not supporting display"); 2458 wps->use_psk_key = 1; 2459 } 2460 2461 return 0; 2462 } 2463 2464 2465 static int wps_process_wps_state(struct wps_data *wps, const u8 *state) 2466 { 2467 if (state == NULL) { 2468 wpa_printf(MSG_DEBUG, "WPS: No Wi-Fi Protected Setup State " 2469 "received"); 2470 return -1; 2471 } 2472 2473 wpa_printf(MSG_DEBUG, "WPS: Enrollee Wi-Fi Protected Setup State %d", 2474 *state); 2475 2476 return 0; 2477 } 2478 2479 2480 static int wps_process_assoc_state(struct wps_data *wps, const u8 *assoc) 2481 { 2482 u16 a; 2483 2484 if (assoc == NULL) { 2485 wpa_printf(MSG_DEBUG, "WPS: No Association State received"); 2486 return -1; 2487 } 2488 2489 a = WPA_GET_BE16(assoc); 2490 wpa_printf(MSG_DEBUG, "WPS: Enrollee Association State %d", a); 2491 2492 return 0; 2493 } 2494 2495 2496 static int wps_process_config_error(struct wps_data *wps, const u8 *err) 2497 { 2498 u16 e; 2499 2500 if (err == NULL) { 2501 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error received"); 2502 return -1; 2503 } 2504 2505 e = WPA_GET_BE16(err); 2506 wpa_printf(MSG_DEBUG, "WPS: Enrollee Configuration Error %d", e); 2507 2508 return 0; 2509 } 2510 2511 2512 static int wps_registrar_p2p_dev_addr_match(struct wps_data *wps) 2513 { 2514 #ifdef CONFIG_P2P 2515 struct wps_registrar *reg = wps->wps->registrar; 2516 2517 if (is_zero_ether_addr(reg->p2p_dev_addr)) 2518 return 1; /* no filtering in use */ 2519 2520 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) != 0) { 2521 wpa_printf(MSG_DEBUG, "WPS: No match on P2P Device Address " 2522 "filtering for PBC: expected " MACSTR " was " 2523 MACSTR " - indicate PBC session overlap", 2524 MAC2STR(reg->p2p_dev_addr), 2525 MAC2STR(wps->p2p_dev_addr)); 2526 return 0; 2527 } 2528 #endif /* CONFIG_P2P */ 2529 return 1; 2530 } 2531 2532 2533 static int wps_registrar_skip_overlap(struct wps_data *wps) 2534 { 2535 #ifdef CONFIG_P2P 2536 struct wps_registrar *reg = wps->wps->registrar; 2537 2538 if (is_zero_ether_addr(reg->p2p_dev_addr)) 2539 return 0; /* no specific Enrollee selected */ 2540 2541 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) == 0) { 2542 wpa_printf(MSG_DEBUG, "WPS: Skip PBC overlap due to selected " 2543 "Enrollee match"); 2544 return 1; 2545 } 2546 #endif /* CONFIG_P2P */ 2547 return 0; 2548 } 2549 2550 2551 static enum wps_process_res wps_process_m1(struct wps_data *wps, 2552 struct wps_parse_attr *attr) 2553 { 2554 wpa_printf(MSG_DEBUG, "WPS: Received M1"); 2555 2556 if (wps->state != RECV_M1) { 2557 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2558 "receiving M1", wps->state); 2559 return WPS_FAILURE; 2560 } 2561 2562 if (wps_process_uuid_e(wps, attr->uuid_e) || 2563 wps_process_mac_addr(wps, attr->mac_addr) || 2564 wps_process_enrollee_nonce(wps, attr->enrollee_nonce) || 2565 wps_process_pubkey(wps, attr->public_key, attr->public_key_len) || 2566 wps_process_auth_type_flags(wps, attr->auth_type_flags) || 2567 wps_process_encr_type_flags(wps, attr->encr_type_flags) || 2568 wps_process_conn_type_flags(wps, attr->conn_type_flags) || 2569 wps_process_config_methods(wps, attr->config_methods) || 2570 wps_process_wps_state(wps, attr->wps_state) || 2571 wps_process_device_attrs(&wps->peer_dev, attr) || 2572 wps_process_rf_bands(&wps->peer_dev, attr->rf_bands) || 2573 wps_process_assoc_state(wps, attr->assoc_state) || 2574 wps_process_dev_password_id(wps, attr->dev_password_id) || 2575 wps_process_config_error(wps, attr->config_error) || 2576 wps_process_os_version(&wps->peer_dev, attr->os_version)) 2577 return WPS_FAILURE; 2578 2579 if (wps->dev_pw_id < 0x10 && 2580 wps->dev_pw_id != DEV_PW_DEFAULT && 2581 wps->dev_pw_id != DEV_PW_P2PS_DEFAULT && 2582 wps->dev_pw_id != DEV_PW_USER_SPECIFIED && 2583 wps->dev_pw_id != DEV_PW_MACHINE_SPECIFIED && 2584 wps->dev_pw_id != DEV_PW_REGISTRAR_SPECIFIED && 2585 #ifdef CONFIG_WPS_NFC 2586 wps->dev_pw_id != DEV_PW_NFC_CONNECTION_HANDOVER && 2587 #endif /* CONFIG_WPS_NFC */ 2588 (wps->dev_pw_id != DEV_PW_PUSHBUTTON || 2589 !wps->wps->registrar->pbc)) { 2590 wpa_printf(MSG_DEBUG, "WPS: Unsupported Device Password ID %d", 2591 wps->dev_pw_id); 2592 wps->state = SEND_M2D; 2593 return WPS_CONTINUE; 2594 } 2595 2596 #ifdef CONFIG_WPS_NFC 2597 if (wps->dev_pw_id >= 0x10 || 2598 wps->dev_pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) { 2599 struct wps_nfc_pw_token *token; 2600 const u8 *addr[1]; 2601 u8 hash[WPS_HASH_LEN]; 2602 2603 wpa_printf(MSG_DEBUG, "WPS: Searching for NFC token match for id=%d (ctx %p registrar %p)", 2604 wps->dev_pw_id, wps->wps, wps->wps->registrar); 2605 token = wps_get_nfc_pw_token( 2606 &wps->wps->registrar->nfc_pw_tokens, wps->dev_pw_id); 2607 if (token && token->peer_pk_hash_known) { 2608 wpa_printf(MSG_DEBUG, "WPS: Found matching NFC " 2609 "Password Token"); 2610 dl_list_del(&token->list); 2611 wps->nfc_pw_token = token; 2612 2613 addr[0] = attr->public_key; 2614 sha256_vector(1, addr, &attr->public_key_len, hash); 2615 if (os_memcmp_const(hash, 2616 wps->nfc_pw_token->pubkey_hash, 2617 WPS_OOB_PUBKEY_HASH_LEN) != 0) { 2618 wpa_printf(MSG_ERROR, "WPS: Public Key hash " 2619 "mismatch"); 2620 wps->state = SEND_M2D; 2621 wps->config_error = 2622 WPS_CFG_PUBLIC_KEY_HASH_MISMATCH; 2623 return WPS_CONTINUE; 2624 } 2625 } else if (token) { 2626 wpa_printf(MSG_DEBUG, "WPS: Found matching NFC " 2627 "Password Token (no peer PK hash)"); 2628 wps->nfc_pw_token = token; 2629 } else if (wps->dev_pw_id >= 0x10 && 2630 wps->wps->ap_nfc_dev_pw_id == wps->dev_pw_id && 2631 wps->wps->ap_nfc_dev_pw) { 2632 wpa_printf(MSG_DEBUG, "WPS: Found match with own NFC Password Token"); 2633 } 2634 } 2635 #endif /* CONFIG_WPS_NFC */ 2636 2637 if (wps->dev_pw_id == DEV_PW_PUSHBUTTON) { 2638 if ((wps->wps->registrar->force_pbc_overlap || 2639 wps_registrar_pbc_overlap(wps->wps->registrar, 2640 wps->mac_addr_e, wps->uuid_e) || 2641 !wps_registrar_p2p_dev_addr_match(wps)) && 2642 !wps_registrar_skip_overlap(wps)) { 2643 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - deny PBC " 2644 "negotiation"); 2645 wps->state = SEND_M2D; 2646 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2647 wps_pbc_overlap_event(wps->wps); 2648 wps_fail_event(wps->wps, WPS_M1, 2649 WPS_CFG_MULTIPLE_PBC_DETECTED, 2650 WPS_EI_NO_ERROR, wps->mac_addr_e); 2651 wps->wps->registrar->force_pbc_overlap = 1; 2652 return WPS_CONTINUE; 2653 } 2654 wps_registrar_add_pbc_session(wps->wps->registrar, 2655 wps->mac_addr_e, wps->uuid_e); 2656 wps->pbc = 1; 2657 } 2658 2659 #ifdef WPS_WORKAROUNDS 2660 /* 2661 * It looks like Mac OS X 10.6.3 and 10.6.4 do not like Network Key in 2662 * passphrase format. To avoid interop issues, force PSK format to be 2663 * used. 2664 */ 2665 if (!wps->use_psk_key && 2666 wps->peer_dev.manufacturer && 2667 os_strncmp(wps->peer_dev.manufacturer, "Apple ", 6) == 0 && 2668 wps->peer_dev.model_name && 2669 os_strcmp(wps->peer_dev.model_name, "AirPort") == 0) { 2670 wpa_printf(MSG_DEBUG, "WPS: Workaround - Force Network Key in " 2671 "PSK format"); 2672 wps->use_psk_key = 1; 2673 } 2674 #endif /* WPS_WORKAROUNDS */ 2675 2676 wps->state = SEND_M2; 2677 return WPS_CONTINUE; 2678 } 2679 2680 2681 static enum wps_process_res wps_process_m3(struct wps_data *wps, 2682 const struct wpabuf *msg, 2683 struct wps_parse_attr *attr) 2684 { 2685 wpa_printf(MSG_DEBUG, "WPS: Received M3"); 2686 2687 if (wps->state != RECV_M3) { 2688 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2689 "receiving M3", wps->state); 2690 wps->state = SEND_WSC_NACK; 2691 return WPS_CONTINUE; 2692 } 2693 2694 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2695 !wps_registrar_skip_overlap(wps)) { 2696 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2697 "session overlap"); 2698 wps->state = SEND_WSC_NACK; 2699 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2700 return WPS_CONTINUE; 2701 } 2702 2703 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2704 wps_process_authenticator(wps, attr->authenticator, msg) || 2705 wps_process_e_hash1(wps, attr->e_hash1) || 2706 wps_process_e_hash2(wps, attr->e_hash2)) { 2707 wps->state = SEND_WSC_NACK; 2708 return WPS_CONTINUE; 2709 } 2710 2711 wps->state = SEND_M4; 2712 return WPS_CONTINUE; 2713 } 2714 2715 2716 static enum wps_process_res wps_process_m5(struct wps_data *wps, 2717 const struct wpabuf *msg, 2718 struct wps_parse_attr *attr) 2719 { 2720 struct wpabuf *decrypted; 2721 struct wps_parse_attr eattr; 2722 2723 wpa_printf(MSG_DEBUG, "WPS: Received M5"); 2724 2725 if (wps->state != RECV_M5) { 2726 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2727 "receiving M5", wps->state); 2728 wps->state = SEND_WSC_NACK; 2729 return WPS_CONTINUE; 2730 } 2731 2732 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2733 !wps_registrar_skip_overlap(wps)) { 2734 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2735 "session overlap"); 2736 wps->state = SEND_WSC_NACK; 2737 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2738 return WPS_CONTINUE; 2739 } 2740 2741 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2742 wps_process_authenticator(wps, attr->authenticator, msg)) { 2743 wps->state = SEND_WSC_NACK; 2744 return WPS_CONTINUE; 2745 } 2746 2747 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings, 2748 attr->encr_settings_len); 2749 if (decrypted == NULL) { 2750 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted " 2751 "Settings attribute"); 2752 wps->state = SEND_WSC_NACK; 2753 return WPS_CONTINUE; 2754 } 2755 2756 if (wps_validate_m5_encr(decrypted, attr->version2 != NULL) < 0) { 2757 wpabuf_free(decrypted); 2758 wps->state = SEND_WSC_NACK; 2759 return WPS_CONTINUE; 2760 } 2761 2762 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings " 2763 "attribute"); 2764 if (wps_parse_msg(decrypted, &eattr) < 0 || 2765 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) || 2766 wps_process_e_snonce1(wps, eattr.e_snonce1)) { 2767 wpabuf_free(decrypted); 2768 wps->state = SEND_WSC_NACK; 2769 return WPS_CONTINUE; 2770 } 2771 wpabuf_free(decrypted); 2772 2773 wps->state = SEND_M6; 2774 return WPS_CONTINUE; 2775 } 2776 2777 2778 static void wps_sta_cred_cb(struct wps_data *wps) 2779 { 2780 /* 2781 * Update credential to only include a single authentication and 2782 * encryption type in case the AP configuration includes more than one 2783 * option. 2784 */ 2785 if (wps->cred.auth_type & WPS_AUTH_WPA2PSK) 2786 wps->cred.auth_type = WPS_AUTH_WPA2PSK; 2787 else if (wps->cred.auth_type & WPS_AUTH_WPAPSK) 2788 wps->cred.auth_type = WPS_AUTH_WPAPSK; 2789 if (wps->cred.encr_type & WPS_ENCR_AES) 2790 wps->cred.encr_type = WPS_ENCR_AES; 2791 else if (wps->cred.encr_type & WPS_ENCR_TKIP) 2792 wps->cred.encr_type = WPS_ENCR_TKIP; 2793 wpa_printf(MSG_DEBUG, "WPS: Update local configuration based on the " 2794 "AP configuration"); 2795 if (wps->wps->cred_cb) 2796 wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred); 2797 } 2798 2799 2800 static void wps_cred_update(struct wps_credential *dst, 2801 struct wps_credential *src) 2802 { 2803 os_memcpy(dst->ssid, src->ssid, sizeof(dst->ssid)); 2804 dst->ssid_len = src->ssid_len; 2805 dst->auth_type = src->auth_type; 2806 dst->encr_type = src->encr_type; 2807 dst->key_idx = src->key_idx; 2808 os_memcpy(dst->key, src->key, sizeof(dst->key)); 2809 dst->key_len = src->key_len; 2810 } 2811 2812 2813 static int wps_process_ap_settings_r(struct wps_data *wps, 2814 struct wps_parse_attr *attr) 2815 { 2816 struct wpabuf *msg; 2817 2818 if (wps->wps->ap || wps->er) 2819 return 0; 2820 2821 /* AP Settings Attributes in M7 when Enrollee is an AP */ 2822 if (wps_process_ap_settings(attr, &wps->cred) < 0) 2823 return -1; 2824 2825 wpa_printf(MSG_INFO, "WPS: Received old AP configuration from AP"); 2826 2827 if (wps->new_ap_settings) { 2828 wpa_printf(MSG_INFO, "WPS: Update AP configuration based on " 2829 "new settings"); 2830 wps_cred_update(&wps->cred, wps->new_ap_settings); 2831 return 0; 2832 } else { 2833 /* 2834 * Use the AP PIN only to receive the current AP settings, not 2835 * to reconfigure the AP. 2836 */ 2837 2838 /* 2839 * Clear selected registrar here since we do not get to 2840 * WSC_Done in this protocol run. 2841 */ 2842 wps_registrar_pin_completed(wps->wps->registrar); 2843 2844 msg = wps_build_ap_cred(wps); 2845 if (msg == NULL) 2846 return -1; 2847 wps->cred.cred_attr = wpabuf_head(msg); 2848 wps->cred.cred_attr_len = wpabuf_len(msg); 2849 2850 if (wps->ap_settings_cb) { 2851 wps->ap_settings_cb(wps->ap_settings_cb_ctx, 2852 &wps->cred); 2853 wpabuf_free(msg); 2854 return 1; 2855 } 2856 wps_sta_cred_cb(wps); 2857 2858 wps->cred.cred_attr = NULL; 2859 wps->cred.cred_attr_len = 0; 2860 wpabuf_free(msg); 2861 2862 return 1; 2863 } 2864 } 2865 2866 2867 static enum wps_process_res wps_process_m7(struct wps_data *wps, 2868 const struct wpabuf *msg, 2869 struct wps_parse_attr *attr) 2870 { 2871 struct wpabuf *decrypted; 2872 struct wps_parse_attr eattr; 2873 2874 wpa_printf(MSG_DEBUG, "WPS: Received M7"); 2875 2876 if (wps->state != RECV_M7) { 2877 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2878 "receiving M7", wps->state); 2879 wps->state = SEND_WSC_NACK; 2880 return WPS_CONTINUE; 2881 } 2882 2883 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2884 !wps_registrar_skip_overlap(wps)) { 2885 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2886 "session overlap"); 2887 wps->state = SEND_WSC_NACK; 2888 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2889 return WPS_CONTINUE; 2890 } 2891 2892 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2893 wps_process_authenticator(wps, attr->authenticator, msg)) { 2894 wps->state = SEND_WSC_NACK; 2895 return WPS_CONTINUE; 2896 } 2897 2898 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings, 2899 attr->encr_settings_len); 2900 if (decrypted == NULL) { 2901 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypt Encrypted " 2902 "Settings attribute"); 2903 wps->state = SEND_WSC_NACK; 2904 return WPS_CONTINUE; 2905 } 2906 2907 if (wps_validate_m7_encr(decrypted, wps->wps->ap || wps->er, 2908 attr->version2 != NULL) < 0) { 2909 wpabuf_free(decrypted); 2910 wps->state = SEND_WSC_NACK; 2911 return WPS_CONTINUE; 2912 } 2913 2914 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings " 2915 "attribute"); 2916 if (wps_parse_msg(decrypted, &eattr) < 0 || 2917 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) || 2918 wps_process_e_snonce2(wps, eattr.e_snonce2) || 2919 wps_process_ap_settings_r(wps, &eattr)) { 2920 wpabuf_free(decrypted); 2921 wps->state = SEND_WSC_NACK; 2922 return WPS_CONTINUE; 2923 } 2924 2925 wpabuf_free(decrypted); 2926 2927 wps->state = SEND_M8; 2928 return WPS_CONTINUE; 2929 } 2930 2931 2932 static enum wps_process_res wps_process_wsc_msg(struct wps_data *wps, 2933 const struct wpabuf *msg) 2934 { 2935 struct wps_parse_attr attr; 2936 enum wps_process_res ret = WPS_CONTINUE; 2937 2938 wpa_printf(MSG_DEBUG, "WPS: Received WSC_MSG"); 2939 2940 if (wps_parse_msg(msg, &attr) < 0) 2941 return WPS_FAILURE; 2942 2943 if (attr.msg_type == NULL) { 2944 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 2945 wps->state = SEND_WSC_NACK; 2946 return WPS_CONTINUE; 2947 } 2948 2949 if (*attr.msg_type != WPS_M1 && 2950 (attr.registrar_nonce == NULL || 2951 os_memcmp(wps->nonce_r, attr.registrar_nonce, 2952 WPS_NONCE_LEN) != 0)) { 2953 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 2954 return WPS_FAILURE; 2955 } 2956 2957 switch (*attr.msg_type) { 2958 case WPS_M1: 2959 if (wps_validate_m1(msg) < 0) 2960 return WPS_FAILURE; 2961 #ifdef CONFIG_WPS_UPNP 2962 if (wps->wps->wps_upnp && attr.mac_addr) { 2963 /* Remove old pending messages when starting new run */ 2964 wps_free_pending_msgs(wps->wps->upnp_msgs); 2965 wps->wps->upnp_msgs = NULL; 2966 2967 upnp_wps_device_send_wlan_event( 2968 wps->wps->wps_upnp, attr.mac_addr, 2969 UPNP_WPS_WLANEVENT_TYPE_EAP, msg); 2970 } 2971 #endif /* CONFIG_WPS_UPNP */ 2972 ret = wps_process_m1(wps, &attr); 2973 break; 2974 case WPS_M3: 2975 if (wps_validate_m3(msg) < 0) 2976 return WPS_FAILURE; 2977 ret = wps_process_m3(wps, msg, &attr); 2978 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 2979 wps_fail_event(wps->wps, WPS_M3, wps->config_error, 2980 wps->error_indication, wps->mac_addr_e); 2981 break; 2982 case WPS_M5: 2983 if (wps_validate_m5(msg) < 0) 2984 return WPS_FAILURE; 2985 ret = wps_process_m5(wps, msg, &attr); 2986 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 2987 wps_fail_event(wps->wps, WPS_M5, wps->config_error, 2988 wps->error_indication, wps->mac_addr_e); 2989 break; 2990 case WPS_M7: 2991 if (wps_validate_m7(msg) < 0) 2992 return WPS_FAILURE; 2993 ret = wps_process_m7(wps, msg, &attr); 2994 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 2995 wps_fail_event(wps->wps, WPS_M7, wps->config_error, 2996 wps->error_indication, wps->mac_addr_e); 2997 break; 2998 default: 2999 wpa_printf(MSG_DEBUG, "WPS: Unsupported Message Type %d", 3000 *attr.msg_type); 3001 return WPS_FAILURE; 3002 } 3003 3004 if (ret == WPS_CONTINUE) { 3005 /* Save a copy of the last message for Authenticator derivation 3006 */ 3007 wpabuf_free(wps->last_msg); 3008 wps->last_msg = wpabuf_dup(msg); 3009 } 3010 3011 return ret; 3012 } 3013 3014 3015 static enum wps_process_res wps_process_wsc_ack(struct wps_data *wps, 3016 const struct wpabuf *msg) 3017 { 3018 struct wps_parse_attr attr; 3019 3020 wpa_printf(MSG_DEBUG, "WPS: Received WSC_ACK"); 3021 3022 if (wps_parse_msg(msg, &attr) < 0) 3023 return WPS_FAILURE; 3024 3025 if (attr.msg_type == NULL) { 3026 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3027 return WPS_FAILURE; 3028 } 3029 3030 if (*attr.msg_type != WPS_WSC_ACK) { 3031 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 3032 *attr.msg_type); 3033 return WPS_FAILURE; 3034 } 3035 3036 #ifdef CONFIG_WPS_UPNP 3037 if (wps->wps->wps_upnp && wps->ext_reg && wps->state == RECV_M2D_ACK && 3038 upnp_wps_subscribers(wps->wps->wps_upnp)) { 3039 if (wps->wps->upnp_msgs) 3040 return WPS_CONTINUE; 3041 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an " 3042 "external Registrar"); 3043 return WPS_PENDING; 3044 } 3045 #endif /* CONFIG_WPS_UPNP */ 3046 3047 if (attr.registrar_nonce == NULL || 3048 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 3049 { 3050 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3051 return WPS_FAILURE; 3052 } 3053 3054 if (attr.enrollee_nonce == NULL || 3055 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 3056 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 3057 return WPS_FAILURE; 3058 } 3059 3060 if (wps->state == RECV_M2D_ACK) { 3061 #ifdef CONFIG_WPS_UPNP 3062 if (wps->wps->wps_upnp && 3063 upnp_wps_subscribers(wps->wps->wps_upnp)) { 3064 if (wps->wps->upnp_msgs) 3065 return WPS_CONTINUE; 3066 if (wps->ext_reg == 0) 3067 wps->ext_reg = 1; 3068 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an " 3069 "external Registrar"); 3070 return WPS_PENDING; 3071 } 3072 #endif /* CONFIG_WPS_UPNP */ 3073 3074 wpa_printf(MSG_DEBUG, "WPS: No more registrars available - " 3075 "terminate negotiation"); 3076 } 3077 3078 return WPS_FAILURE; 3079 } 3080 3081 3082 static enum wps_process_res wps_process_wsc_nack(struct wps_data *wps, 3083 const struct wpabuf *msg) 3084 { 3085 struct wps_parse_attr attr; 3086 int old_state; 3087 u16 config_error; 3088 3089 wpa_printf(MSG_DEBUG, "WPS: Received WSC_NACK"); 3090 3091 old_state = wps->state; 3092 wps->state = SEND_WSC_NACK; 3093 3094 if (wps_parse_msg(msg, &attr) < 0) 3095 return WPS_FAILURE; 3096 3097 if (attr.msg_type == NULL) { 3098 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3099 return WPS_FAILURE; 3100 } 3101 3102 if (*attr.msg_type != WPS_WSC_NACK) { 3103 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 3104 *attr.msg_type); 3105 return WPS_FAILURE; 3106 } 3107 3108 #ifdef CONFIG_WPS_UPNP 3109 if (wps->wps->wps_upnp && wps->ext_reg) { 3110 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external " 3111 "Registrar terminated by the Enrollee"); 3112 return WPS_FAILURE; 3113 } 3114 #endif /* CONFIG_WPS_UPNP */ 3115 3116 if (attr.registrar_nonce == NULL || 3117 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 3118 { 3119 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3120 return WPS_FAILURE; 3121 } 3122 3123 if (attr.enrollee_nonce == NULL || 3124 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 3125 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 3126 return WPS_FAILURE; 3127 } 3128 3129 if (attr.config_error == NULL) { 3130 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error attribute " 3131 "in WSC_NACK"); 3132 return WPS_FAILURE; 3133 } 3134 3135 config_error = WPA_GET_BE16(attr.config_error); 3136 wpa_printf(MSG_DEBUG, "WPS: Enrollee terminated negotiation with " 3137 "Configuration Error %d", config_error); 3138 3139 switch (old_state) { 3140 case RECV_M3: 3141 wps_fail_event(wps->wps, WPS_M2, config_error, 3142 wps->error_indication, wps->mac_addr_e); 3143 break; 3144 case RECV_M5: 3145 wps_fail_event(wps->wps, WPS_M4, config_error, 3146 wps->error_indication, wps->mac_addr_e); 3147 break; 3148 case RECV_M7: 3149 wps_fail_event(wps->wps, WPS_M6, config_error, 3150 wps->error_indication, wps->mac_addr_e); 3151 break; 3152 case RECV_DONE: 3153 wps_fail_event(wps->wps, WPS_M8, config_error, 3154 wps->error_indication, wps->mac_addr_e); 3155 break; 3156 default: 3157 break; 3158 } 3159 3160 return WPS_FAILURE; 3161 } 3162 3163 3164 static enum wps_process_res wps_process_wsc_done(struct wps_data *wps, 3165 const struct wpabuf *msg) 3166 { 3167 struct wps_parse_attr attr; 3168 3169 wpa_printf(MSG_DEBUG, "WPS: Received WSC_Done"); 3170 3171 if (wps->state != RECV_DONE && 3172 (!wps->wps->wps_upnp || !wps->ext_reg)) { 3173 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 3174 "receiving WSC_Done", wps->state); 3175 return WPS_FAILURE; 3176 } 3177 3178 if (wps_parse_msg(msg, &attr) < 0) 3179 return WPS_FAILURE; 3180 3181 if (attr.msg_type == NULL) { 3182 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3183 return WPS_FAILURE; 3184 } 3185 3186 if (*attr.msg_type != WPS_WSC_DONE) { 3187 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 3188 *attr.msg_type); 3189 return WPS_FAILURE; 3190 } 3191 3192 #ifdef CONFIG_WPS_UPNP 3193 if (wps->wps->wps_upnp && wps->ext_reg) { 3194 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external " 3195 "Registrar completed successfully"); 3196 wps_device_store(wps->wps->registrar, &wps->peer_dev, 3197 wps->uuid_e); 3198 return WPS_DONE; 3199 } 3200 #endif /* CONFIG_WPS_UPNP */ 3201 3202 if (attr.registrar_nonce == NULL || 3203 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 3204 { 3205 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3206 return WPS_FAILURE; 3207 } 3208 3209 if (attr.enrollee_nonce == NULL || 3210 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 3211 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 3212 return WPS_FAILURE; 3213 } 3214 3215 wpa_printf(MSG_DEBUG, "WPS: Negotiation completed successfully"); 3216 wps_device_store(wps->wps->registrar, &wps->peer_dev, 3217 wps->uuid_e); 3218 3219 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->new_psk && 3220 wps->wps->ap && !wps->wps->registrar->disable_auto_conf) { 3221 struct wps_credential cred; 3222 3223 wpa_printf(MSG_DEBUG, "WPS: Moving to Configured state based " 3224 "on first Enrollee connection"); 3225 3226 os_memset(&cred, 0, sizeof(cred)); 3227 os_memcpy(cred.ssid, wps->wps->ssid, wps->wps->ssid_len); 3228 cred.ssid_len = wps->wps->ssid_len; 3229 cred.auth_type = WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK; 3230 cred.encr_type = WPS_ENCR_TKIP | WPS_ENCR_AES; 3231 os_memcpy(cred.key, wps->new_psk, wps->new_psk_len); 3232 cred.key_len = wps->new_psk_len; 3233 3234 wps->wps->wps_state = WPS_STATE_CONFIGURED; 3235 wpa_hexdump_ascii_key(MSG_DEBUG, 3236 "WPS: Generated random passphrase", 3237 wps->new_psk, wps->new_psk_len); 3238 if (wps->wps->cred_cb) 3239 wps->wps->cred_cb(wps->wps->cb_ctx, &cred); 3240 3241 os_free(wps->new_psk); 3242 wps->new_psk = NULL; 3243 } 3244 3245 if (!wps->wps->ap && !wps->er) 3246 wps_sta_cred_cb(wps); 3247 3248 if (wps->new_psk) { 3249 if (wps_cb_new_psk(wps->wps->registrar, wps->mac_addr_e, 3250 wps->p2p_dev_addr, wps->new_psk, 3251 wps->new_psk_len)) { 3252 wpa_printf(MSG_DEBUG, "WPS: Failed to configure the " 3253 "new PSK"); 3254 } 3255 os_free(wps->new_psk); 3256 wps->new_psk = NULL; 3257 } 3258 3259 wps_cb_reg_success(wps->wps->registrar, wps->mac_addr_e, wps->uuid_e, 3260 wps->dev_password, wps->dev_password_len); 3261 3262 if (wps->pbc) { 3263 wps_registrar_remove_pbc_session(wps->wps->registrar, 3264 wps->uuid_e, 3265 wps->p2p_dev_addr); 3266 wps_registrar_pbc_completed(wps->wps->registrar); 3267 #ifdef WPS_WORKAROUNDS 3268 os_get_reltime(&wps->wps->registrar->pbc_ignore_start); 3269 #endif /* WPS_WORKAROUNDS */ 3270 os_memcpy(wps->wps->registrar->pbc_ignore_uuid, wps->uuid_e, 3271 WPS_UUID_LEN); 3272 } else { 3273 wps_registrar_pin_completed(wps->wps->registrar); 3274 } 3275 /* TODO: maintain AuthorizedMACs somewhere separately for each ER and 3276 * merge them into APs own list.. */ 3277 3278 wps_success_event(wps->wps, wps->mac_addr_e); 3279 3280 return WPS_DONE; 3281 } 3282 3283 3284 enum wps_process_res wps_registrar_process_msg(struct wps_data *wps, 3285 enum wsc_op_code op_code, 3286 const struct wpabuf *msg) 3287 { 3288 enum wps_process_res ret; 3289 3290 wpa_printf(MSG_DEBUG, "WPS: Processing received message (len=%lu " 3291 "op_code=%d)", 3292 (unsigned long) wpabuf_len(msg), op_code); 3293 3294 #ifdef CONFIG_WPS_UPNP 3295 if (wps->wps->wps_upnp && op_code == WSC_MSG && wps->ext_reg == 1) { 3296 struct wps_parse_attr attr; 3297 if (wps_parse_msg(msg, &attr) == 0 && attr.msg_type && 3298 *attr.msg_type == WPS_M3) 3299 wps->ext_reg = 2; /* past M2/M2D phase */ 3300 } 3301 if (wps->ext_reg > 1) 3302 wps_registrar_free_pending_m2(wps->wps); 3303 if (wps->wps->wps_upnp && wps->ext_reg && 3304 wps->wps->upnp_msgs == NULL && 3305 (op_code == WSC_MSG || op_code == WSC_Done || op_code == WSC_NACK)) 3306 { 3307 struct wps_parse_attr attr; 3308 int type; 3309 if (wps_parse_msg(msg, &attr) < 0 || attr.msg_type == NULL) 3310 type = -1; 3311 else 3312 type = *attr.msg_type; 3313 wpa_printf(MSG_DEBUG, "WPS: Sending received message (type %d)" 3314 " to external Registrar for processing", type); 3315 upnp_wps_device_send_wlan_event(wps->wps->wps_upnp, 3316 wps->mac_addr_e, 3317 UPNP_WPS_WLANEVENT_TYPE_EAP, 3318 msg); 3319 if (op_code == WSC_MSG) 3320 return WPS_PENDING; 3321 } else if (wps->wps->wps_upnp && wps->ext_reg && op_code == WSC_MSG) { 3322 wpa_printf(MSG_DEBUG, "WPS: Skip internal processing - using " 3323 "external Registrar"); 3324 return WPS_CONTINUE; 3325 } 3326 #endif /* CONFIG_WPS_UPNP */ 3327 3328 switch (op_code) { 3329 case WSC_MSG: 3330 return wps_process_wsc_msg(wps, msg); 3331 case WSC_ACK: 3332 if (wps_validate_wsc_ack(msg) < 0) 3333 return WPS_FAILURE; 3334 return wps_process_wsc_ack(wps, msg); 3335 case WSC_NACK: 3336 if (wps_validate_wsc_nack(msg) < 0) 3337 return WPS_FAILURE; 3338 return wps_process_wsc_nack(wps, msg); 3339 case WSC_Done: 3340 if (wps_validate_wsc_done(msg) < 0) 3341 return WPS_FAILURE; 3342 ret = wps_process_wsc_done(wps, msg); 3343 if (ret == WPS_FAILURE) { 3344 wps->state = SEND_WSC_NACK; 3345 wps_fail_event(wps->wps, WPS_WSC_DONE, 3346 wps->config_error, 3347 wps->error_indication, wps->mac_addr_e); 3348 } 3349 return ret; 3350 default: 3351 wpa_printf(MSG_DEBUG, "WPS: Unsupported op_code %d", op_code); 3352 return WPS_FAILURE; 3353 } 3354 } 3355 3356 3357 int wps_registrar_update_ie(struct wps_registrar *reg) 3358 { 3359 return wps_set_ie(reg); 3360 } 3361 3362 3363 static void wps_registrar_set_selected_timeout(void *eloop_ctx, 3364 void *timeout_ctx) 3365 { 3366 struct wps_registrar *reg = eloop_ctx; 3367 3368 wpa_printf(MSG_DEBUG, "WPS: Selected Registrar timeout - " 3369 "unselect internal Registrar"); 3370 reg->selected_registrar = 0; 3371 reg->pbc = 0; 3372 wps_registrar_selected_registrar_changed(reg, 0); 3373 } 3374 3375 3376 #ifdef CONFIG_WPS_UPNP 3377 static void wps_registrar_sel_reg_add(struct wps_registrar *reg, 3378 struct subscription *s) 3379 { 3380 int i, j; 3381 wpa_printf(MSG_DEBUG, "WPS: External Registrar selected (dev_pw_id=%d " 3382 "config_methods=0x%x)", 3383 s->dev_password_id, s->config_methods); 3384 reg->sel_reg_union = 1; 3385 if (reg->sel_reg_dev_password_id_override != DEV_PW_PUSHBUTTON) 3386 reg->sel_reg_dev_password_id_override = s->dev_password_id; 3387 if (reg->sel_reg_config_methods_override == -1) 3388 reg->sel_reg_config_methods_override = 0; 3389 reg->sel_reg_config_methods_override |= s->config_methods; 3390 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) 3391 if (is_zero_ether_addr(reg->authorized_macs_union[i])) 3392 break; 3393 for (j = 0; i < WPS_MAX_AUTHORIZED_MACS && j < WPS_MAX_AUTHORIZED_MACS; 3394 j++) { 3395 if (is_zero_ether_addr(s->authorized_macs[j])) 3396 break; 3397 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC into union: " 3398 MACSTR, MAC2STR(s->authorized_macs[j])); 3399 os_memcpy(reg->authorized_macs_union[i], 3400 s->authorized_macs[j], ETH_ALEN); 3401 i++; 3402 } 3403 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union", 3404 (u8 *) reg->authorized_macs_union, 3405 sizeof(reg->authorized_macs_union)); 3406 } 3407 #endif /* CONFIG_WPS_UPNP */ 3408 3409 3410 static void wps_registrar_sel_reg_union(struct wps_registrar *reg) 3411 { 3412 #ifdef CONFIG_WPS_UPNP 3413 struct subscription *s; 3414 3415 if (reg->wps->wps_upnp == NULL) 3416 return; 3417 3418 dl_list_for_each(s, ®->wps->wps_upnp->subscriptions, 3419 struct subscription, list) { 3420 struct subscr_addr *sa; 3421 sa = dl_list_first(&s->addr_list, struct subscr_addr, list); 3422 if (sa) { 3423 wpa_printf(MSG_DEBUG, "WPS: External Registrar %s:%d", 3424 inet_ntoa(sa->saddr.sin_addr), 3425 ntohs(sa->saddr.sin_port)); 3426 } 3427 if (s->selected_registrar) 3428 wps_registrar_sel_reg_add(reg, s); 3429 else 3430 wpa_printf(MSG_DEBUG, "WPS: External Registrar not " 3431 "selected"); 3432 } 3433 #endif /* CONFIG_WPS_UPNP */ 3434 } 3435 3436 3437 /** 3438 * wps_registrar_selected_registrar_changed - SetSelectedRegistrar change 3439 * @reg: Registrar data from wps_registrar_init() 3440 * 3441 * This function is called when selected registrar state changes, e.g., when an 3442 * AP receives a SetSelectedRegistrar UPnP message. 3443 */ 3444 void wps_registrar_selected_registrar_changed(struct wps_registrar *reg, 3445 u16 dev_pw_id) 3446 { 3447 wpa_printf(MSG_DEBUG, "WPS: Selected registrar information changed"); 3448 3449 reg->sel_reg_union = reg->selected_registrar; 3450 reg->sel_reg_dev_password_id_override = -1; 3451 reg->sel_reg_config_methods_override = -1; 3452 os_memcpy(reg->authorized_macs_union, reg->authorized_macs, 3453 WPS_MAX_AUTHORIZED_MACS * ETH_ALEN); 3454 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union (start with own)", 3455 (u8 *) reg->authorized_macs_union, 3456 sizeof(reg->authorized_macs_union)); 3457 if (reg->selected_registrar) { 3458 u16 methods; 3459 3460 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 3461 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 3462 WPS_CONFIG_PHY_PUSHBUTTON); 3463 if (reg->pbc) { 3464 reg->sel_reg_dev_password_id_override = 3465 DEV_PW_PUSHBUTTON; 3466 wps_set_pushbutton(&methods, reg->wps->config_methods); 3467 } else if (dev_pw_id) 3468 reg->sel_reg_dev_password_id_override = dev_pw_id; 3469 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar selected " 3470 "(pbc=%d)", reg->pbc); 3471 reg->sel_reg_config_methods_override = methods; 3472 } else 3473 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar not selected"); 3474 3475 wps_registrar_sel_reg_union(reg); 3476 3477 wps_set_ie(reg); 3478 wps_cb_set_sel_reg(reg); 3479 } 3480 3481 3482 int wps_registrar_get_info(struct wps_registrar *reg, const u8 *addr, 3483 char *buf, size_t buflen) 3484 { 3485 struct wps_registrar_device *d; 3486 int len = 0, ret; 3487 char uuid[40]; 3488 char devtype[WPS_DEV_TYPE_BUFSIZE]; 3489 3490 d = wps_device_get(reg, addr); 3491 if (d == NULL) 3492 return 0; 3493 if (uuid_bin2str(d->uuid, uuid, sizeof(uuid))) 3494 return 0; 3495 3496 ret = os_snprintf(buf + len, buflen - len, 3497 "wpsUuid=%s\n" 3498 "wpsPrimaryDeviceType=%s\n" 3499 "wpsDeviceName=%s\n" 3500 "wpsManufacturer=%s\n" 3501 "wpsModelName=%s\n" 3502 "wpsModelNumber=%s\n" 3503 "wpsSerialNumber=%s\n", 3504 uuid, 3505 wps_dev_type_bin2str(d->dev.pri_dev_type, devtype, 3506 sizeof(devtype)), 3507 d->dev.device_name ? d->dev.device_name : "", 3508 d->dev.manufacturer ? d->dev.manufacturer : "", 3509 d->dev.model_name ? d->dev.model_name : "", 3510 d->dev.model_number ? d->dev.model_number : "", 3511 d->dev.serial_number ? d->dev.serial_number : ""); 3512 if (os_snprintf_error(buflen - len, ret)) 3513 return len; 3514 len += ret; 3515 3516 return len; 3517 } 3518 3519 3520 int wps_registrar_config_ap(struct wps_registrar *reg, 3521 struct wps_credential *cred) 3522 { 3523 wpa_printf(MSG_DEBUG, "WPS: encr_type=0x%x", cred->encr_type); 3524 if (!(cred->encr_type & (WPS_ENCR_NONE | WPS_ENCR_TKIP | 3525 WPS_ENCR_AES))) { 3526 if (cred->encr_type & WPS_ENCR_WEP) { 3527 wpa_printf(MSG_INFO, "WPS: Reject new AP settings " 3528 "due to WEP configuration"); 3529 return -1; 3530 } 3531 3532 wpa_printf(MSG_INFO, "WPS: Reject new AP settings due to " 3533 "invalid encr_type 0x%x", cred->encr_type); 3534 return -1; 3535 } 3536 3537 if ((cred->encr_type & (WPS_ENCR_TKIP | WPS_ENCR_AES)) == 3538 WPS_ENCR_TKIP) { 3539 wpa_printf(MSG_DEBUG, "WPS: Upgrade encr_type TKIP -> " 3540 "TKIP+AES"); 3541 cred->encr_type |= WPS_ENCR_AES; 3542 } 3543 3544 if ((cred->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) == 3545 WPS_AUTH_WPAPSK) { 3546 wpa_printf(MSG_DEBUG, "WPS: Upgrade auth_type WPAPSK -> " 3547 "WPAPSK+WPA2PSK"); 3548 cred->auth_type |= WPS_AUTH_WPA2PSK; 3549 } 3550 3551 if (reg->wps->cred_cb) 3552 return reg->wps->cred_cb(reg->wps->cb_ctx, cred); 3553 3554 return -1; 3555 } 3556 3557 3558 #ifdef CONFIG_WPS_NFC 3559 3560 int wps_registrar_add_nfc_pw_token(struct wps_registrar *reg, 3561 const u8 *pubkey_hash, u16 pw_id, 3562 const u8 *dev_pw, size_t dev_pw_len, 3563 int pk_hash_provided_oob) 3564 { 3565 struct wps_nfc_pw_token *token; 3566 3567 if (dev_pw_len > WPS_OOB_DEVICE_PASSWORD_LEN) 3568 return -1; 3569 3570 if (pw_id == DEV_PW_NFC_CONNECTION_HANDOVER && 3571 (pubkey_hash == NULL || !pk_hash_provided_oob)) { 3572 wpa_printf(MSG_DEBUG, "WPS: Unexpected NFC Password Token " 3573 "addition - missing public key hash"); 3574 return -1; 3575 } 3576 3577 wps_free_nfc_pw_tokens(®->nfc_pw_tokens, pw_id); 3578 3579 token = os_zalloc(sizeof(*token)); 3580 if (token == NULL) 3581 return -1; 3582 3583 token->peer_pk_hash_known = pubkey_hash != NULL; 3584 if (pubkey_hash) 3585 os_memcpy(token->pubkey_hash, pubkey_hash, 3586 WPS_OOB_PUBKEY_HASH_LEN); 3587 token->pw_id = pw_id; 3588 token->pk_hash_provided_oob = pk_hash_provided_oob; 3589 if (dev_pw) { 3590 wpa_snprintf_hex_uppercase((char *) token->dev_pw, 3591 sizeof(token->dev_pw), 3592 dev_pw, dev_pw_len); 3593 token->dev_pw_len = dev_pw_len * 2; 3594 } 3595 3596 dl_list_add(®->nfc_pw_tokens, &token->list); 3597 3598 reg->selected_registrar = 1; 3599 reg->pbc = 0; 3600 wps_registrar_add_authorized_mac(reg, 3601 (u8 *) "\xff\xff\xff\xff\xff\xff"); 3602 wps_registrar_selected_registrar_changed(reg, pw_id); 3603 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 3604 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, 3605 wps_registrar_set_selected_timeout, 3606 reg, NULL); 3607 3608 wpa_printf(MSG_DEBUG, "WPS: Added NFC Device Password %u to Registrar", 3609 pw_id); 3610 3611 return 0; 3612 } 3613 3614 3615 int wps_registrar_add_nfc_password_token(struct wps_registrar *reg, 3616 const u8 *oob_dev_pw, 3617 size_t oob_dev_pw_len) 3618 { 3619 const u8 *pos, *hash, *dev_pw; 3620 u16 id; 3621 size_t dev_pw_len; 3622 3623 if (oob_dev_pw_len < WPS_OOB_PUBKEY_HASH_LEN + 2 || 3624 oob_dev_pw_len > WPS_OOB_PUBKEY_HASH_LEN + 2 + 3625 WPS_OOB_DEVICE_PASSWORD_LEN) 3626 return -1; 3627 3628 hash = oob_dev_pw; 3629 pos = oob_dev_pw + WPS_OOB_PUBKEY_HASH_LEN; 3630 id = WPA_GET_BE16(pos); 3631 dev_pw = pos + 2; 3632 dev_pw_len = oob_dev_pw + oob_dev_pw_len - dev_pw; 3633 3634 wpa_printf(MSG_DEBUG, "WPS: Add NFC Password Token for Password ID %u", 3635 id); 3636 3637 wpa_hexdump(MSG_DEBUG, "WPS: Public Key Hash", 3638 hash, WPS_OOB_PUBKEY_HASH_LEN); 3639 wpa_hexdump_key(MSG_DEBUG, "WPS: Device Password", dev_pw, dev_pw_len); 3640 3641 return wps_registrar_add_nfc_pw_token(reg, hash, id, dev_pw, 3642 dev_pw_len, 0); 3643 } 3644 3645 3646 void wps_registrar_remove_nfc_pw_token(struct wps_registrar *reg, 3647 struct wps_nfc_pw_token *token) 3648 { 3649 wps_registrar_remove_authorized_mac(reg, 3650 (u8 *) "\xff\xff\xff\xff\xff\xff"); 3651 wps_registrar_selected_registrar_changed(reg, 0); 3652 3653 /* 3654 * Free the NFC password token if it was used only for a single protocol 3655 * run. The static handover case uses the same password token multiple 3656 * times, so do not free that case here. 3657 */ 3658 if (token->peer_pk_hash_known) 3659 os_free(token); 3660 } 3661 3662 #endif /* CONFIG_WPS_NFC */ 3663