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 os_free(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 os_free(pin->pin); 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 #ifdef CONFIG_WPS2 542 if ((conf_methods & WPS_CONFIG_VIRT_PUSHBUTTON) == 543 WPS_CONFIG_VIRT_PUSHBUTTON) 544 *methods |= WPS_CONFIG_VIRT_PUSHBUTTON; 545 if ((conf_methods & WPS_CONFIG_PHY_PUSHBUTTON) == 546 WPS_CONFIG_PHY_PUSHBUTTON) 547 *methods |= WPS_CONFIG_PHY_PUSHBUTTON; 548 if ((*methods & WPS_CONFIG_VIRT_PUSHBUTTON) != 549 WPS_CONFIG_VIRT_PUSHBUTTON && 550 (*methods & WPS_CONFIG_PHY_PUSHBUTTON) != 551 WPS_CONFIG_PHY_PUSHBUTTON) { 552 /* 553 * Required to include virtual/physical flag, but we were not 554 * configured with push button type, so have to default to one 555 * of them. 556 */ 557 *methods |= WPS_CONFIG_PHY_PUSHBUTTON; 558 } 559 #endif /* CONFIG_WPS2 */ 560 } 561 562 563 static int wps_build_sel_reg_config_methods(struct wps_registrar *reg, 564 struct wpabuf *msg) 565 { 566 u16 methods; 567 if (!reg->sel_reg_union) 568 return 0; 569 methods = reg->wps->config_methods; 570 methods &= ~WPS_CONFIG_PUSHBUTTON; 571 #ifdef CONFIG_WPS2 572 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 573 WPS_CONFIG_PHY_PUSHBUTTON); 574 #endif /* CONFIG_WPS2 */ 575 if (reg->pbc) 576 wps_set_pushbutton(&methods, reg->wps->config_methods); 577 if (reg->sel_reg_config_methods_override >= 0) 578 methods = reg->sel_reg_config_methods_override; 579 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar Config Methods (%x)", 580 methods); 581 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR_CONFIG_METHODS); 582 wpabuf_put_be16(msg, 2); 583 wpabuf_put_be16(msg, methods); 584 return 0; 585 } 586 587 588 static int wps_build_probe_config_methods(struct wps_registrar *reg, 589 struct wpabuf *msg) 590 { 591 u16 methods; 592 /* 593 * These are the methods that the AP supports as an Enrollee for adding 594 * external Registrars. 595 */ 596 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 597 #ifdef CONFIG_WPS2 598 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 599 WPS_CONFIG_PHY_PUSHBUTTON); 600 #endif /* CONFIG_WPS2 */ 601 wpa_printf(MSG_DEBUG, "WPS: * Config Methods (%x)", methods); 602 wpabuf_put_be16(msg, ATTR_CONFIG_METHODS); 603 wpabuf_put_be16(msg, 2); 604 wpabuf_put_be16(msg, methods); 605 return 0; 606 } 607 608 609 static int wps_build_config_methods_r(struct wps_registrar *reg, 610 struct wpabuf *msg) 611 { 612 return wps_build_config_methods(msg, reg->wps->config_methods); 613 } 614 615 616 const u8 * wps_authorized_macs(struct wps_registrar *reg, size_t *count) 617 { 618 *count = 0; 619 620 #ifdef CONFIG_WPS2 621 while (*count < WPS_MAX_AUTHORIZED_MACS) { 622 if (is_zero_ether_addr(reg->authorized_macs_union[*count])) 623 break; 624 (*count)++; 625 } 626 #endif /* CONFIG_WPS2 */ 627 628 return (const u8 *) reg->authorized_macs_union; 629 } 630 631 632 /** 633 * wps_registrar_init - Initialize WPS Registrar data 634 * @wps: Pointer to longterm WPS context 635 * @cfg: Registrar configuration 636 * Returns: Pointer to allocated Registrar data or %NULL on failure 637 * 638 * This function is used to initialize WPS Registrar functionality. It can be 639 * used for a single Registrar run (e.g., when run in a supplicant) or multiple 640 * runs (e.g., when run as an internal Registrar in an AP). Caller is 641 * responsible for freeing the returned data with wps_registrar_deinit() when 642 * Registrar functionality is not needed anymore. 643 */ 644 struct wps_registrar * 645 wps_registrar_init(struct wps_context *wps, 646 const struct wps_registrar_config *cfg) 647 { 648 struct wps_registrar *reg = os_zalloc(sizeof(*reg)); 649 if (reg == NULL) 650 return NULL; 651 652 dl_list_init(®->pins); 653 dl_list_init(®->nfc_pw_tokens); 654 reg->wps = wps; 655 reg->new_psk_cb = cfg->new_psk_cb; 656 reg->set_ie_cb = cfg->set_ie_cb; 657 reg->pin_needed_cb = cfg->pin_needed_cb; 658 reg->reg_success_cb = cfg->reg_success_cb; 659 reg->set_sel_reg_cb = cfg->set_sel_reg_cb; 660 reg->enrollee_seen_cb = cfg->enrollee_seen_cb; 661 reg->cb_ctx = cfg->cb_ctx; 662 reg->skip_cred_build = cfg->skip_cred_build; 663 if (cfg->extra_cred) { 664 reg->extra_cred = wpabuf_alloc_copy(cfg->extra_cred, 665 cfg->extra_cred_len); 666 if (reg->extra_cred == NULL) { 667 os_free(reg); 668 return NULL; 669 } 670 } 671 reg->disable_auto_conf = cfg->disable_auto_conf; 672 reg->sel_reg_dev_password_id_override = -1; 673 reg->sel_reg_config_methods_override = -1; 674 reg->static_wep_only = cfg->static_wep_only; 675 reg->dualband = cfg->dualband; 676 reg->force_per_enrollee_psk = cfg->force_per_enrollee_psk; 677 678 if (wps_set_ie(reg)) { 679 wps_registrar_deinit(reg); 680 return NULL; 681 } 682 683 return reg; 684 } 685 686 687 /** 688 * wps_registrar_deinit - Deinitialize WPS Registrar data 689 * @reg: Registrar data from wps_registrar_init() 690 */ 691 void wps_registrar_deinit(struct wps_registrar *reg) 692 { 693 if (reg == NULL) 694 return; 695 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 696 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 697 wps_free_pins(®->pins); 698 wps_free_nfc_pw_tokens(®->nfc_pw_tokens, 0); 699 wps_free_pbc_sessions(reg->pbc_sessions); 700 wpabuf_free(reg->extra_cred); 701 wps_free_devices(reg->devices); 702 os_free(reg); 703 } 704 705 706 static void wps_registrar_invalidate_unused(struct wps_registrar *reg) 707 { 708 struct wps_uuid_pin *pin; 709 710 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 711 if (pin->wildcard_uuid == 1 && !(pin->flags & PIN_LOCKED)) { 712 wpa_printf(MSG_DEBUG, "WPS: Invalidate previously " 713 "configured wildcard PIN"); 714 wps_registrar_remove_pin(reg, pin); 715 break; 716 } 717 } 718 } 719 720 721 /** 722 * wps_registrar_add_pin - Configure a new PIN for Registrar 723 * @reg: Registrar data from wps_registrar_init() 724 * @addr: Enrollee MAC address or %NULL if not known 725 * @uuid: UUID-E or %NULL for wildcard (any UUID) 726 * @pin: PIN (Device Password) 727 * @pin_len: Length of pin in octets 728 * @timeout: Time (in seconds) when the PIN will be invalidated; 0 = no timeout 729 * Returns: 0 on success, -1 on failure 730 */ 731 int wps_registrar_add_pin(struct wps_registrar *reg, const u8 *addr, 732 const u8 *uuid, const u8 *pin, size_t pin_len, 733 int timeout) 734 { 735 struct wps_uuid_pin *p; 736 737 p = os_zalloc(sizeof(*p)); 738 if (p == NULL) 739 return -1; 740 if (addr) 741 os_memcpy(p->enrollee_addr, addr, ETH_ALEN); 742 if (uuid == NULL) 743 p->wildcard_uuid = 1; 744 else 745 os_memcpy(p->uuid, uuid, WPS_UUID_LEN); 746 p->pin = os_malloc(pin_len); 747 if (p->pin == NULL) { 748 os_free(p); 749 return -1; 750 } 751 os_memcpy(p->pin, pin, pin_len); 752 p->pin_len = pin_len; 753 754 if (timeout) { 755 p->flags |= PIN_EXPIRES; 756 os_get_reltime(&p->expiration); 757 p->expiration.sec += timeout; 758 } 759 760 if (p->wildcard_uuid) 761 wps_registrar_invalidate_unused(reg); 762 763 dl_list_add(®->pins, &p->list); 764 765 wpa_printf(MSG_DEBUG, "WPS: A new PIN configured (timeout=%d)", 766 timeout); 767 wpa_hexdump(MSG_DEBUG, "WPS: UUID", uuid, WPS_UUID_LEN); 768 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: PIN", pin, pin_len); 769 reg->selected_registrar = 1; 770 reg->pbc = 0; 771 if (addr) 772 wps_registrar_add_authorized_mac(reg, addr); 773 else 774 wps_registrar_add_authorized_mac( 775 reg, (u8 *) "\xff\xff\xff\xff\xff\xff"); 776 wps_registrar_selected_registrar_changed(reg, 0); 777 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 778 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, 779 wps_registrar_set_selected_timeout, 780 reg, NULL); 781 782 return 0; 783 } 784 785 786 static void wps_registrar_remove_pin(struct wps_registrar *reg, 787 struct wps_uuid_pin *pin) 788 { 789 u8 *addr; 790 u8 bcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 791 792 if (is_zero_ether_addr(pin->enrollee_addr)) 793 addr = bcast; 794 else 795 addr = pin->enrollee_addr; 796 wps_registrar_remove_authorized_mac(reg, addr); 797 wps_remove_pin(pin); 798 wps_registrar_selected_registrar_changed(reg, 0); 799 } 800 801 802 static void wps_registrar_expire_pins(struct wps_registrar *reg) 803 { 804 struct wps_uuid_pin *pin, *prev; 805 struct os_reltime now; 806 807 os_get_reltime(&now); 808 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 809 { 810 if ((pin->flags & PIN_EXPIRES) && 811 os_reltime_before(&pin->expiration, &now)) { 812 wpa_hexdump(MSG_DEBUG, "WPS: Expired PIN for UUID", 813 pin->uuid, WPS_UUID_LEN); 814 wps_registrar_remove_pin(reg, pin); 815 } 816 } 817 } 818 819 820 /** 821 * wps_registrar_invalidate_wildcard_pin - Invalidate a wildcard PIN 822 * @reg: Registrar data from wps_registrar_init() 823 * @dev_pw: PIN to search for or %NULL to match any 824 * @dev_pw_len: Length of dev_pw in octets 825 * Returns: 0 on success, -1 if not wildcard PIN is enabled 826 */ 827 static int wps_registrar_invalidate_wildcard_pin(struct wps_registrar *reg, 828 const u8 *dev_pw, 829 size_t dev_pw_len) 830 { 831 struct wps_uuid_pin *pin, *prev; 832 833 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 834 { 835 if (dev_pw && pin->pin && 836 (dev_pw_len != pin->pin_len || 837 os_memcmp(dev_pw, pin->pin, dev_pw_len) != 0)) 838 continue; /* different PIN */ 839 if (pin->wildcard_uuid) { 840 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID", 841 pin->uuid, WPS_UUID_LEN); 842 wps_registrar_remove_pin(reg, pin); 843 return 0; 844 } 845 } 846 847 return -1; 848 } 849 850 851 /** 852 * wps_registrar_invalidate_pin - Invalidate a PIN for a specific UUID-E 853 * @reg: Registrar data from wps_registrar_init() 854 * @uuid: UUID-E 855 * Returns: 0 on success, -1 on failure (e.g., PIN not found) 856 */ 857 int wps_registrar_invalidate_pin(struct wps_registrar *reg, const u8 *uuid) 858 { 859 struct wps_uuid_pin *pin, *prev; 860 861 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 862 { 863 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 864 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID", 865 pin->uuid, WPS_UUID_LEN); 866 wps_registrar_remove_pin(reg, pin); 867 return 0; 868 } 869 } 870 871 return -1; 872 } 873 874 875 static const u8 * wps_registrar_get_pin(struct wps_registrar *reg, 876 const u8 *uuid, size_t *pin_len) 877 { 878 struct wps_uuid_pin *pin, *found = NULL; 879 880 wps_registrar_expire_pins(reg); 881 882 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 883 if (!pin->wildcard_uuid && 884 os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 885 found = pin; 886 break; 887 } 888 } 889 890 if (!found) { 891 /* Check for wildcard UUIDs since none of the UUID-specific 892 * PINs matched */ 893 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 894 if (pin->wildcard_uuid == 1 || 895 pin->wildcard_uuid == 2) { 896 wpa_printf(MSG_DEBUG, "WPS: Found a wildcard " 897 "PIN. Assigned it for this UUID-E"); 898 pin->wildcard_uuid++; 899 os_memcpy(pin->uuid, uuid, WPS_UUID_LEN); 900 found = pin; 901 break; 902 } 903 } 904 } 905 906 if (!found) 907 return NULL; 908 909 /* 910 * Lock the PIN to avoid attacks based on concurrent re-use of the PIN 911 * that could otherwise avoid PIN invalidations. 912 */ 913 if (found->flags & PIN_LOCKED) { 914 wpa_printf(MSG_DEBUG, "WPS: Selected PIN locked - do not " 915 "allow concurrent re-use"); 916 return NULL; 917 } 918 *pin_len = found->pin_len; 919 found->flags |= PIN_LOCKED; 920 return found->pin; 921 } 922 923 924 /** 925 * wps_registrar_unlock_pin - Unlock a PIN for a specific UUID-E 926 * @reg: Registrar data from wps_registrar_init() 927 * @uuid: UUID-E 928 * Returns: 0 on success, -1 on failure 929 * 930 * PINs are locked to enforce only one concurrent use. This function unlocks a 931 * PIN to allow it to be used again. If the specified PIN was configured using 932 * a wildcard UUID, it will be removed instead of allowing multiple uses. 933 */ 934 int wps_registrar_unlock_pin(struct wps_registrar *reg, const u8 *uuid) 935 { 936 struct wps_uuid_pin *pin; 937 938 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 939 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 940 if (pin->wildcard_uuid == 3) { 941 wpa_printf(MSG_DEBUG, "WPS: Invalidating used " 942 "wildcard PIN"); 943 return wps_registrar_invalidate_pin(reg, uuid); 944 } 945 pin->flags &= ~PIN_LOCKED; 946 return 0; 947 } 948 } 949 950 return -1; 951 } 952 953 954 static void wps_registrar_stop_pbc(struct wps_registrar *reg) 955 { 956 reg->selected_registrar = 0; 957 reg->pbc = 0; 958 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN); 959 wps_registrar_remove_authorized_mac(reg, 960 (u8 *) "\xff\xff\xff\xff\xff\xff"); 961 wps_registrar_selected_registrar_changed(reg, 0); 962 } 963 964 965 static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx) 966 { 967 struct wps_registrar *reg = eloop_ctx; 968 969 wpa_printf(MSG_DEBUG, "WPS: PBC timed out - disable PBC mode"); 970 wps_pbc_timeout_event(reg->wps); 971 wps_registrar_stop_pbc(reg); 972 } 973 974 975 /** 976 * wps_registrar_button_pushed - Notify Registrar that AP button was pushed 977 * @reg: Registrar data from wps_registrar_init() 978 * @p2p_dev_addr: Limit allowed PBC devices to the specified P2P device, %NULL 979 * indicates no such filtering 980 * Returns: 0 on success, -1 on failure, -2 on session overlap 981 * 982 * This function is called on an AP when a push button is pushed to activate 983 * PBC mode. The PBC mode will be stopped after walk time (2 minutes) timeout 984 * or when a PBC registration is completed. If more than one Enrollee in active 985 * PBC mode has been detected during the monitor time (previous 2 minutes), the 986 * PBC mode is not activated and -2 is returned to indicate session overlap. 987 * This is skipped if a specific Enrollee is selected. 988 */ 989 int wps_registrar_button_pushed(struct wps_registrar *reg, 990 const u8 *p2p_dev_addr) 991 { 992 if (p2p_dev_addr == NULL && 993 wps_registrar_pbc_overlap(reg, NULL, NULL)) { 994 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - do not start PBC " 995 "mode"); 996 wps_pbc_overlap_event(reg->wps); 997 return -2; 998 } 999 wpa_printf(MSG_DEBUG, "WPS: Button pushed - PBC mode started"); 1000 reg->force_pbc_overlap = 0; 1001 reg->selected_registrar = 1; 1002 reg->pbc = 1; 1003 if (p2p_dev_addr) 1004 os_memcpy(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN); 1005 else 1006 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN); 1007 wps_registrar_add_authorized_mac(reg, 1008 (u8 *) "\xff\xff\xff\xff\xff\xff"); 1009 wps_registrar_selected_registrar_changed(reg, 0); 1010 1011 wps_pbc_active_event(reg->wps); 1012 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 1013 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 1014 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wps_registrar_pbc_timeout, 1015 reg, NULL); 1016 return 0; 1017 } 1018 1019 1020 static void wps_registrar_pbc_completed(struct wps_registrar *reg) 1021 { 1022 wpa_printf(MSG_DEBUG, "WPS: PBC completed - stopping PBC mode"); 1023 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 1024 wps_registrar_stop_pbc(reg); 1025 wps_pbc_disable_event(reg->wps); 1026 } 1027 1028 1029 static void wps_registrar_pin_completed(struct wps_registrar *reg) 1030 { 1031 wpa_printf(MSG_DEBUG, "WPS: PIN completed using internal Registrar"); 1032 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 1033 reg->selected_registrar = 0; 1034 wps_registrar_selected_registrar_changed(reg, 0); 1035 } 1036 1037 1038 void wps_registrar_complete(struct wps_registrar *registrar, const u8 *uuid_e, 1039 const u8 *dev_pw, size_t dev_pw_len) 1040 { 1041 if (registrar->pbc) { 1042 wps_registrar_remove_pbc_session(registrar, 1043 uuid_e, NULL); 1044 wps_registrar_pbc_completed(registrar); 1045 #ifdef WPS_WORKAROUNDS 1046 os_get_reltime(®istrar->pbc_ignore_start); 1047 #endif /* WPS_WORKAROUNDS */ 1048 os_memcpy(registrar->pbc_ignore_uuid, uuid_e, WPS_UUID_LEN); 1049 } else { 1050 wps_registrar_pin_completed(registrar); 1051 } 1052 1053 if (dev_pw && 1054 wps_registrar_invalidate_wildcard_pin(registrar, dev_pw, 1055 dev_pw_len) == 0) { 1056 wpa_hexdump_key(MSG_DEBUG, "WPS: Invalidated wildcard PIN", 1057 dev_pw, dev_pw_len); 1058 } 1059 } 1060 1061 1062 int wps_registrar_wps_cancel(struct wps_registrar *reg) 1063 { 1064 if (reg->pbc) { 1065 wpa_printf(MSG_DEBUG, "WPS: PBC is set - cancelling it"); 1066 wps_registrar_pbc_timeout(reg, NULL); 1067 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 1068 return 1; 1069 } else if (reg->selected_registrar) { 1070 /* PIN Method */ 1071 wpa_printf(MSG_DEBUG, "WPS: PIN is set - cancelling it"); 1072 wps_registrar_pin_completed(reg); 1073 wps_registrar_invalidate_wildcard_pin(reg, NULL, 0); 1074 return 1; 1075 } 1076 return 0; 1077 } 1078 1079 1080 /** 1081 * wps_registrar_probe_req_rx - Notify Registrar of Probe Request 1082 * @reg: Registrar data from wps_registrar_init() 1083 * @addr: MAC address of the Probe Request sender 1084 * @wps_data: WPS IE contents 1085 * 1086 * This function is called on an AP when a Probe Request with WPS IE is 1087 * received. This is used to track PBC mode use and to detect possible overlap 1088 * situation with other WPS APs. 1089 */ 1090 void wps_registrar_probe_req_rx(struct wps_registrar *reg, const u8 *addr, 1091 const struct wpabuf *wps_data, 1092 int p2p_wildcard) 1093 { 1094 struct wps_parse_attr attr; 1095 int skip_add = 0; 1096 1097 wpa_hexdump_buf(MSG_MSGDUMP, 1098 "WPS: Probe Request with WPS data received", 1099 wps_data); 1100 1101 if (wps_parse_msg(wps_data, &attr) < 0) 1102 return; 1103 1104 if (attr.config_methods == NULL) { 1105 wpa_printf(MSG_DEBUG, "WPS: No Config Methods attribute in " 1106 "Probe Request"); 1107 return; 1108 } 1109 1110 if (attr.dev_password_id == NULL) { 1111 wpa_printf(MSG_DEBUG, "WPS: No Device Password Id attribute " 1112 "in Probe Request"); 1113 return; 1114 } 1115 1116 if (reg->enrollee_seen_cb && attr.uuid_e && 1117 attr.primary_dev_type && attr.request_type && !p2p_wildcard) { 1118 char *dev_name = NULL; 1119 if (attr.dev_name) { 1120 dev_name = os_zalloc(attr.dev_name_len + 1); 1121 if (dev_name) { 1122 os_memcpy(dev_name, attr.dev_name, 1123 attr.dev_name_len); 1124 } 1125 } 1126 reg->enrollee_seen_cb(reg->cb_ctx, addr, attr.uuid_e, 1127 attr.primary_dev_type, 1128 WPA_GET_BE16(attr.config_methods), 1129 WPA_GET_BE16(attr.dev_password_id), 1130 *attr.request_type, dev_name); 1131 os_free(dev_name); 1132 } 1133 1134 if (WPA_GET_BE16(attr.dev_password_id) != DEV_PW_PUSHBUTTON) 1135 return; /* Not PBC */ 1136 1137 wpa_printf(MSG_DEBUG, "WPS: Probe Request for PBC received from " 1138 MACSTR, MAC2STR(addr)); 1139 if (attr.uuid_e == NULL) { 1140 wpa_printf(MSG_DEBUG, "WPS: Invalid Probe Request WPS IE: No " 1141 "UUID-E included"); 1142 return; 1143 } 1144 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E from Probe Request", attr.uuid_e, 1145 WPS_UUID_LEN); 1146 1147 #ifdef WPS_WORKAROUNDS 1148 if (reg->pbc_ignore_start.sec && 1149 os_memcmp(attr.uuid_e, reg->pbc_ignore_uuid, WPS_UUID_LEN) == 0) { 1150 struct os_reltime now, dur; 1151 os_get_reltime(&now); 1152 os_reltime_sub(&now, ®->pbc_ignore_start, &dur); 1153 if (dur.sec >= 0 && dur.sec < 5) { 1154 wpa_printf(MSG_DEBUG, "WPS: Ignore PBC activation " 1155 "based on Probe Request from the Enrollee " 1156 "that just completed PBC provisioning"); 1157 skip_add = 1; 1158 } else 1159 reg->pbc_ignore_start.sec = 0; 1160 } 1161 #endif /* WPS_WORKAROUNDS */ 1162 1163 if (!skip_add) 1164 wps_registrar_add_pbc_session(reg, addr, attr.uuid_e); 1165 if (wps_registrar_pbc_overlap(reg, addr, attr.uuid_e)) { 1166 wpa_printf(MSG_DEBUG, "WPS: PBC session overlap detected"); 1167 reg->force_pbc_overlap = 1; 1168 wps_pbc_overlap_event(reg->wps); 1169 } 1170 } 1171 1172 1173 static int wps_cb_new_psk(struct wps_registrar *reg, const u8 *mac_addr, 1174 const u8 *p2p_dev_addr, const u8 *psk, size_t psk_len) 1175 { 1176 if (reg->new_psk_cb == NULL) 1177 return 0; 1178 1179 return reg->new_psk_cb(reg->cb_ctx, mac_addr, p2p_dev_addr, psk, 1180 psk_len); 1181 } 1182 1183 1184 static void wps_cb_pin_needed(struct wps_registrar *reg, const u8 *uuid_e, 1185 const struct wps_device_data *dev) 1186 { 1187 if (reg->pin_needed_cb == NULL) 1188 return; 1189 1190 reg->pin_needed_cb(reg->cb_ctx, uuid_e, dev); 1191 } 1192 1193 1194 static void wps_cb_reg_success(struct wps_registrar *reg, const u8 *mac_addr, 1195 const u8 *uuid_e, const u8 *dev_pw, 1196 size_t dev_pw_len) 1197 { 1198 if (reg->reg_success_cb == NULL) 1199 return; 1200 1201 reg->reg_success_cb(reg->cb_ctx, mac_addr, uuid_e, dev_pw, dev_pw_len); 1202 } 1203 1204 1205 static int wps_cb_set_ie(struct wps_registrar *reg, struct wpabuf *beacon_ie, 1206 struct wpabuf *probe_resp_ie) 1207 { 1208 return reg->set_ie_cb(reg->cb_ctx, beacon_ie, probe_resp_ie); 1209 } 1210 1211 1212 static void wps_cb_set_sel_reg(struct wps_registrar *reg) 1213 { 1214 u16 methods = 0; 1215 if (reg->set_sel_reg_cb == NULL) 1216 return; 1217 1218 if (reg->selected_registrar) { 1219 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 1220 #ifdef CONFIG_WPS2 1221 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 1222 WPS_CONFIG_PHY_PUSHBUTTON); 1223 #endif /* CONFIG_WPS2 */ 1224 if (reg->pbc) 1225 wps_set_pushbutton(&methods, reg->wps->config_methods); 1226 } 1227 1228 wpa_printf(MSG_DEBUG, "WPS: wps_cb_set_sel_reg: sel_reg=%d " 1229 "config_methods=0x%x pbc=%d methods=0x%x", 1230 reg->selected_registrar, reg->wps->config_methods, 1231 reg->pbc, methods); 1232 1233 reg->set_sel_reg_cb(reg->cb_ctx, reg->selected_registrar, 1234 reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT, 1235 methods); 1236 } 1237 1238 1239 static int wps_set_ie(struct wps_registrar *reg) 1240 { 1241 struct wpabuf *beacon; 1242 struct wpabuf *probe; 1243 const u8 *auth_macs; 1244 size_t count; 1245 size_t vendor_len = 0; 1246 int i; 1247 1248 if (reg->set_ie_cb == NULL) 1249 return 0; 1250 1251 for (i = 0; i < MAX_WPS_VENDOR_EXTENSIONS; i++) { 1252 if (reg->wps->dev.vendor_ext[i]) { 1253 vendor_len += 2 + 2; 1254 vendor_len += wpabuf_len(reg->wps->dev.vendor_ext[i]); 1255 } 1256 } 1257 1258 beacon = wpabuf_alloc(400 + vendor_len); 1259 if (beacon == NULL) 1260 return -1; 1261 probe = wpabuf_alloc(500 + vendor_len); 1262 if (probe == NULL) { 1263 wpabuf_free(beacon); 1264 return -1; 1265 } 1266 1267 auth_macs = wps_authorized_macs(reg, &count); 1268 1269 wpa_printf(MSG_DEBUG, "WPS: Build Beacon IEs"); 1270 1271 if (wps_build_version(beacon) || 1272 wps_build_wps_state(reg->wps, beacon) || 1273 wps_build_ap_setup_locked(reg->wps, beacon) || 1274 wps_build_selected_registrar(reg, beacon) || 1275 wps_build_sel_reg_dev_password_id(reg, beacon) || 1276 wps_build_sel_reg_config_methods(reg, beacon) || 1277 wps_build_sel_pbc_reg_uuid_e(reg, beacon) || 1278 (reg->dualband && wps_build_rf_bands(®->wps->dev, beacon, 0)) || 1279 wps_build_wfa_ext(beacon, 0, auth_macs, count) || 1280 wps_build_vendor_ext(®->wps->dev, beacon)) { 1281 wpabuf_free(beacon); 1282 wpabuf_free(probe); 1283 return -1; 1284 } 1285 1286 #ifdef CONFIG_P2P 1287 if (wps_build_dev_name(®->wps->dev, beacon) || 1288 wps_build_primary_dev_type(®->wps->dev, beacon)) { 1289 wpabuf_free(beacon); 1290 wpabuf_free(probe); 1291 return -1; 1292 } 1293 #endif /* CONFIG_P2P */ 1294 1295 wpa_printf(MSG_DEBUG, "WPS: Build Probe Response IEs"); 1296 1297 if (wps_build_version(probe) || 1298 wps_build_wps_state(reg->wps, probe) || 1299 wps_build_ap_setup_locked(reg->wps, probe) || 1300 wps_build_selected_registrar(reg, probe) || 1301 wps_build_sel_reg_dev_password_id(reg, probe) || 1302 wps_build_sel_reg_config_methods(reg, probe) || 1303 wps_build_resp_type(probe, reg->wps->ap ? WPS_RESP_AP : 1304 WPS_RESP_REGISTRAR) || 1305 wps_build_uuid_e(probe, reg->wps->uuid) || 1306 wps_build_device_attrs(®->wps->dev, probe) || 1307 wps_build_probe_config_methods(reg, probe) || 1308 (reg->dualband && wps_build_rf_bands(®->wps->dev, probe, 0)) || 1309 wps_build_wfa_ext(probe, 0, auth_macs, count) || 1310 wps_build_vendor_ext(®->wps->dev, probe)) { 1311 wpabuf_free(beacon); 1312 wpabuf_free(probe); 1313 return -1; 1314 } 1315 1316 beacon = wps_ie_encapsulate(beacon); 1317 probe = wps_ie_encapsulate(probe); 1318 1319 if (!beacon || !probe) { 1320 wpabuf_free(beacon); 1321 wpabuf_free(probe); 1322 return -1; 1323 } 1324 1325 if (reg->static_wep_only) { 1326 /* 1327 * Windows XP and Vista clients can get confused about 1328 * EAP-Identity/Request when they probe the network with 1329 * EAPOL-Start. In such a case, they may assume the network is 1330 * using IEEE 802.1X and prompt user for a certificate while 1331 * the correct (non-WPS) behavior would be to ask for the 1332 * static WEP key. As a workaround, use Microsoft Provisioning 1333 * IE to advertise that legacy 802.1X is not supported. 1334 */ 1335 const u8 ms_wps[7] = { 1336 WLAN_EID_VENDOR_SPECIFIC, 5, 1337 /* Microsoft Provisioning IE (00:50:f2:5) */ 1338 0x00, 0x50, 0xf2, 5, 1339 0x00 /* no legacy 802.1X or MS WPS */ 1340 }; 1341 wpa_printf(MSG_DEBUG, "WPS: Add Microsoft Provisioning IE " 1342 "into Beacon/Probe Response frames"); 1343 wpabuf_put_data(beacon, ms_wps, sizeof(ms_wps)); 1344 wpabuf_put_data(probe, ms_wps, sizeof(ms_wps)); 1345 } 1346 1347 return wps_cb_set_ie(reg, beacon, probe); 1348 } 1349 1350 1351 static int wps_get_dev_password(struct wps_data *wps) 1352 { 1353 const u8 *pin; 1354 size_t pin_len = 0; 1355 1356 os_free(wps->dev_password); 1357 wps->dev_password = NULL; 1358 1359 if (wps->pbc) { 1360 wpa_printf(MSG_DEBUG, "WPS: Use default PIN for PBC"); 1361 pin = (const u8 *) "00000000"; 1362 pin_len = 8; 1363 #ifdef CONFIG_WPS_NFC 1364 } else if (wps->nfc_pw_token) { 1365 if (wps->nfc_pw_token->pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) 1366 { 1367 wpa_printf(MSG_DEBUG, "WPS: Using NFC connection " 1368 "handover and abbreviated WPS handshake " 1369 "without Device Password"); 1370 return 0; 1371 } 1372 wpa_printf(MSG_DEBUG, "WPS: Use OOB Device Password from NFC " 1373 "Password Token"); 1374 pin = wps->nfc_pw_token->dev_pw; 1375 pin_len = wps->nfc_pw_token->dev_pw_len; 1376 } else if (wps->dev_pw_id >= 0x10 && 1377 wps->wps->ap_nfc_dev_pw_id == wps->dev_pw_id && 1378 wps->wps->ap_nfc_dev_pw) { 1379 wpa_printf(MSG_DEBUG, "WPS: Use OOB Device Password from own NFC Password Token"); 1380 pin = wpabuf_head(wps->wps->ap_nfc_dev_pw); 1381 pin_len = wpabuf_len(wps->wps->ap_nfc_dev_pw); 1382 #endif /* CONFIG_WPS_NFC */ 1383 } else { 1384 pin = wps_registrar_get_pin(wps->wps->registrar, wps->uuid_e, 1385 &pin_len); 1386 if (pin && wps->dev_pw_id >= 0x10) { 1387 wpa_printf(MSG_DEBUG, "WPS: No match for OOB Device " 1388 "Password ID, but PIN found"); 1389 /* 1390 * See whether Enrollee is willing to use PIN instead. 1391 */ 1392 wps->dev_pw_id = DEV_PW_DEFAULT; 1393 } 1394 } 1395 if (pin == NULL) { 1396 wpa_printf(MSG_DEBUG, "WPS: No Device Password available for " 1397 "the Enrollee (context %p registrar %p)", 1398 wps->wps, wps->wps->registrar); 1399 wps_cb_pin_needed(wps->wps->registrar, wps->uuid_e, 1400 &wps->peer_dev); 1401 return -1; 1402 } 1403 1404 wps->dev_password = os_malloc(pin_len); 1405 if (wps->dev_password == NULL) 1406 return -1; 1407 os_memcpy(wps->dev_password, pin, pin_len); 1408 wps->dev_password_len = pin_len; 1409 1410 return 0; 1411 } 1412 1413 1414 static int wps_build_uuid_r(struct wps_data *wps, struct wpabuf *msg) 1415 { 1416 wpa_printf(MSG_DEBUG, "WPS: * UUID-R"); 1417 wpabuf_put_be16(msg, ATTR_UUID_R); 1418 wpabuf_put_be16(msg, WPS_UUID_LEN); 1419 wpabuf_put_data(msg, wps->uuid_r, WPS_UUID_LEN); 1420 return 0; 1421 } 1422 1423 1424 static int wps_build_r_hash(struct wps_data *wps, struct wpabuf *msg) 1425 { 1426 u8 *hash; 1427 const u8 *addr[4]; 1428 size_t len[4]; 1429 1430 if (random_get_bytes(wps->snonce, 2 * WPS_SECRET_NONCE_LEN) < 0) 1431 return -1; 1432 wpa_hexdump(MSG_DEBUG, "WPS: R-S1", wps->snonce, WPS_SECRET_NONCE_LEN); 1433 wpa_hexdump(MSG_DEBUG, "WPS: R-S2", 1434 wps->snonce + WPS_SECRET_NONCE_LEN, WPS_SECRET_NONCE_LEN); 1435 1436 if (wps->dh_pubkey_e == NULL || wps->dh_pubkey_r == NULL) { 1437 wpa_printf(MSG_DEBUG, "WPS: DH public keys not available for " 1438 "R-Hash derivation"); 1439 return -1; 1440 } 1441 1442 wpa_printf(MSG_DEBUG, "WPS: * R-Hash1"); 1443 wpabuf_put_be16(msg, ATTR_R_HASH1); 1444 wpabuf_put_be16(msg, SHA256_MAC_LEN); 1445 hash = wpabuf_put(msg, SHA256_MAC_LEN); 1446 /* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */ 1447 addr[0] = wps->snonce; 1448 len[0] = WPS_SECRET_NONCE_LEN; 1449 addr[1] = wps->psk1; 1450 len[1] = WPS_PSK_LEN; 1451 addr[2] = wpabuf_head(wps->dh_pubkey_e); 1452 len[2] = wpabuf_len(wps->dh_pubkey_e); 1453 addr[3] = wpabuf_head(wps->dh_pubkey_r); 1454 len[3] = wpabuf_len(wps->dh_pubkey_r); 1455 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 1456 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash1", hash, SHA256_MAC_LEN); 1457 1458 wpa_printf(MSG_DEBUG, "WPS: * R-Hash2"); 1459 wpabuf_put_be16(msg, ATTR_R_HASH2); 1460 wpabuf_put_be16(msg, SHA256_MAC_LEN); 1461 hash = wpabuf_put(msg, SHA256_MAC_LEN); 1462 /* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */ 1463 addr[0] = wps->snonce + WPS_SECRET_NONCE_LEN; 1464 addr[1] = wps->psk2; 1465 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 1466 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash2", hash, SHA256_MAC_LEN); 1467 1468 return 0; 1469 } 1470 1471 1472 static int wps_build_r_snonce1(struct wps_data *wps, struct wpabuf *msg) 1473 { 1474 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce1"); 1475 wpabuf_put_be16(msg, ATTR_R_SNONCE1); 1476 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN); 1477 wpabuf_put_data(msg, wps->snonce, WPS_SECRET_NONCE_LEN); 1478 return 0; 1479 } 1480 1481 1482 static int wps_build_r_snonce2(struct wps_data *wps, struct wpabuf *msg) 1483 { 1484 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce2"); 1485 wpabuf_put_be16(msg, ATTR_R_SNONCE2); 1486 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN); 1487 wpabuf_put_data(msg, wps->snonce + WPS_SECRET_NONCE_LEN, 1488 WPS_SECRET_NONCE_LEN); 1489 return 0; 1490 } 1491 1492 1493 static int wps_build_cred_network_idx(struct wpabuf *msg, 1494 const struct wps_credential *cred) 1495 { 1496 wpa_printf(MSG_DEBUG, "WPS: * Network Index (1)"); 1497 wpabuf_put_be16(msg, ATTR_NETWORK_INDEX); 1498 wpabuf_put_be16(msg, 1); 1499 wpabuf_put_u8(msg, 1); 1500 return 0; 1501 } 1502 1503 1504 static int wps_build_cred_ssid(struct wpabuf *msg, 1505 const struct wps_credential *cred) 1506 { 1507 wpa_printf(MSG_DEBUG, "WPS: * SSID"); 1508 wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID for Credential", 1509 cred->ssid, cred->ssid_len); 1510 wpabuf_put_be16(msg, ATTR_SSID); 1511 wpabuf_put_be16(msg, cred->ssid_len); 1512 wpabuf_put_data(msg, cred->ssid, cred->ssid_len); 1513 return 0; 1514 } 1515 1516 1517 static int wps_build_cred_auth_type(struct wpabuf *msg, 1518 const struct wps_credential *cred) 1519 { 1520 wpa_printf(MSG_DEBUG, "WPS: * Authentication Type (0x%x)", 1521 cred->auth_type); 1522 wpabuf_put_be16(msg, ATTR_AUTH_TYPE); 1523 wpabuf_put_be16(msg, 2); 1524 wpabuf_put_be16(msg, cred->auth_type); 1525 return 0; 1526 } 1527 1528 1529 static int wps_build_cred_encr_type(struct wpabuf *msg, 1530 const struct wps_credential *cred) 1531 { 1532 wpa_printf(MSG_DEBUG, "WPS: * Encryption Type (0x%x)", 1533 cred->encr_type); 1534 wpabuf_put_be16(msg, ATTR_ENCR_TYPE); 1535 wpabuf_put_be16(msg, 2); 1536 wpabuf_put_be16(msg, cred->encr_type); 1537 return 0; 1538 } 1539 1540 1541 static int wps_build_cred_network_key(struct wpabuf *msg, 1542 const struct wps_credential *cred) 1543 { 1544 wpa_printf(MSG_DEBUG, "WPS: * Network Key (len=%d)", 1545 (int) cred->key_len); 1546 wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key", 1547 cred->key, cred->key_len); 1548 wpabuf_put_be16(msg, ATTR_NETWORK_KEY); 1549 wpabuf_put_be16(msg, cred->key_len); 1550 wpabuf_put_data(msg, cred->key, cred->key_len); 1551 return 0; 1552 } 1553 1554 1555 static int wps_build_credential(struct wpabuf *msg, 1556 const struct wps_credential *cred) 1557 { 1558 if (wps_build_cred_network_idx(msg, cred) || 1559 wps_build_cred_ssid(msg, cred) || 1560 wps_build_cred_auth_type(msg, cred) || 1561 wps_build_cred_encr_type(msg, cred) || 1562 wps_build_cred_network_key(msg, cred) || 1563 wps_build_mac_addr(msg, cred->mac_addr)) 1564 return -1; 1565 return 0; 1566 } 1567 1568 1569 int wps_build_credential_wrap(struct wpabuf *msg, 1570 const struct wps_credential *cred) 1571 { 1572 struct wpabuf *wbuf; 1573 wbuf = wpabuf_alloc(200); 1574 if (wbuf == NULL) 1575 return -1; 1576 if (wps_build_credential(wbuf, cred)) { 1577 wpabuf_free(wbuf); 1578 return -1; 1579 } 1580 wpabuf_put_be16(msg, ATTR_CRED); 1581 wpabuf_put_be16(msg, wpabuf_len(wbuf)); 1582 wpabuf_put_buf(msg, wbuf); 1583 wpabuf_free(wbuf); 1584 return 0; 1585 } 1586 1587 1588 int wps_build_cred(struct wps_data *wps, struct wpabuf *msg) 1589 { 1590 struct wpabuf *cred; 1591 1592 if (wps->wps->registrar->skip_cred_build) 1593 goto skip_cred_build; 1594 1595 wpa_printf(MSG_DEBUG, "WPS: * Credential"); 1596 if (wps->use_cred) { 1597 os_memcpy(&wps->cred, wps->use_cred, sizeof(wps->cred)); 1598 goto use_provided; 1599 } 1600 os_memset(&wps->cred, 0, sizeof(wps->cred)); 1601 1602 os_memcpy(wps->cred.ssid, wps->wps->ssid, wps->wps->ssid_len); 1603 wps->cred.ssid_len = wps->wps->ssid_len; 1604 1605 /* Select the best authentication and encryption type */ 1606 if (wps->auth_type & WPS_AUTH_WPA2PSK) 1607 wps->auth_type = WPS_AUTH_WPA2PSK; 1608 else if (wps->auth_type & WPS_AUTH_WPAPSK) 1609 wps->auth_type = WPS_AUTH_WPAPSK; 1610 else if (wps->auth_type & WPS_AUTH_OPEN) 1611 wps->auth_type = WPS_AUTH_OPEN; 1612 else if (wps->auth_type & WPS_AUTH_SHARED) 1613 wps->auth_type = WPS_AUTH_SHARED; 1614 else { 1615 wpa_printf(MSG_DEBUG, "WPS: Unsupported auth_type 0x%x", 1616 wps->auth_type); 1617 return -1; 1618 } 1619 wps->cred.auth_type = wps->auth_type; 1620 1621 if (wps->auth_type == WPS_AUTH_WPA2PSK || 1622 wps->auth_type == WPS_AUTH_WPAPSK) { 1623 if (wps->encr_type & WPS_ENCR_AES) 1624 wps->encr_type = WPS_ENCR_AES; 1625 else if (wps->encr_type & WPS_ENCR_TKIP) 1626 wps->encr_type = WPS_ENCR_TKIP; 1627 else { 1628 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption " 1629 "type for WPA/WPA2"); 1630 return -1; 1631 } 1632 } else { 1633 if (wps->encr_type & WPS_ENCR_WEP) 1634 wps->encr_type = WPS_ENCR_WEP; 1635 else if (wps->encr_type & WPS_ENCR_NONE) 1636 wps->encr_type = WPS_ENCR_NONE; 1637 else { 1638 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption " 1639 "type for non-WPA/WPA2 mode"); 1640 return -1; 1641 } 1642 } 1643 wps->cred.encr_type = wps->encr_type; 1644 /* 1645 * Set MAC address in the Credential to be the Enrollee's MAC address 1646 */ 1647 os_memcpy(wps->cred.mac_addr, wps->mac_addr_e, ETH_ALEN); 1648 1649 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->wps->ap && 1650 !wps->wps->registrar->disable_auto_conf) { 1651 u8 r[16]; 1652 /* Generate a random passphrase */ 1653 if (random_get_bytes(r, sizeof(r)) < 0) 1654 return -1; 1655 os_free(wps->new_psk); 1656 wps->new_psk = base64_encode(r, sizeof(r), &wps->new_psk_len); 1657 if (wps->new_psk == NULL) 1658 return -1; 1659 wps->new_psk_len--; /* remove newline */ 1660 while (wps->new_psk_len && 1661 wps->new_psk[wps->new_psk_len - 1] == '=') 1662 wps->new_psk_len--; 1663 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Generated passphrase", 1664 wps->new_psk, wps->new_psk_len); 1665 os_memcpy(wps->cred.key, wps->new_psk, wps->new_psk_len); 1666 wps->cred.key_len = wps->new_psk_len; 1667 } else if (!wps->wps->registrar->force_per_enrollee_psk && 1668 wps->use_psk_key && wps->wps->psk_set) { 1669 char hex[65]; 1670 wpa_printf(MSG_DEBUG, "WPS: Use PSK format for Network Key"); 1671 wpa_snprintf_hex(hex, sizeof(hex), wps->wps->psk, 32); 1672 os_memcpy(wps->cred.key, hex, 32 * 2); 1673 wps->cred.key_len = 32 * 2; 1674 } else if (!wps->wps->registrar->force_per_enrollee_psk && 1675 wps->wps->network_key) { 1676 os_memcpy(wps->cred.key, wps->wps->network_key, 1677 wps->wps->network_key_len); 1678 wps->cred.key_len = wps->wps->network_key_len; 1679 } else if (wps->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) { 1680 char hex[65]; 1681 /* Generate a random per-device PSK */ 1682 os_free(wps->new_psk); 1683 wps->new_psk_len = 32; 1684 wps->new_psk = os_malloc(wps->new_psk_len); 1685 if (wps->new_psk == NULL) 1686 return -1; 1687 if (random_get_bytes(wps->new_psk, wps->new_psk_len) < 0) { 1688 os_free(wps->new_psk); 1689 wps->new_psk = NULL; 1690 return -1; 1691 } 1692 wpa_hexdump_key(MSG_DEBUG, "WPS: Generated per-device PSK", 1693 wps->new_psk, wps->new_psk_len); 1694 wpa_snprintf_hex(hex, sizeof(hex), wps->new_psk, 1695 wps->new_psk_len); 1696 os_memcpy(wps->cred.key, hex, wps->new_psk_len * 2); 1697 wps->cred.key_len = wps->new_psk_len * 2; 1698 } 1699 1700 use_provided: 1701 #ifdef CONFIG_WPS_TESTING 1702 if (wps_testing_dummy_cred) 1703 cred = wpabuf_alloc(200); 1704 else 1705 cred = NULL; 1706 if (cred) { 1707 struct wps_credential dummy; 1708 wpa_printf(MSG_DEBUG, "WPS: Add dummy credential"); 1709 os_memset(&dummy, 0, sizeof(dummy)); 1710 os_memcpy(dummy.ssid, "dummy", 5); 1711 dummy.ssid_len = 5; 1712 dummy.auth_type = WPS_AUTH_WPA2PSK; 1713 dummy.encr_type = WPS_ENCR_AES; 1714 os_memcpy(dummy.key, "dummy psk", 9); 1715 dummy.key_len = 9; 1716 os_memcpy(dummy.mac_addr, wps->mac_addr_e, ETH_ALEN); 1717 wps_build_credential(cred, &dummy); 1718 wpa_hexdump_buf(MSG_DEBUG, "WPS: Dummy Credential", cred); 1719 1720 wpabuf_put_be16(msg, ATTR_CRED); 1721 wpabuf_put_be16(msg, wpabuf_len(cred)); 1722 wpabuf_put_buf(msg, cred); 1723 1724 wpabuf_free(cred); 1725 } 1726 #endif /* CONFIG_WPS_TESTING */ 1727 1728 cred = wpabuf_alloc(200); 1729 if (cred == NULL) 1730 return -1; 1731 1732 if (wps_build_credential(cred, &wps->cred)) { 1733 wpabuf_free(cred); 1734 return -1; 1735 } 1736 1737 wpabuf_put_be16(msg, ATTR_CRED); 1738 wpabuf_put_be16(msg, wpabuf_len(cred)); 1739 wpabuf_put_buf(msg, cred); 1740 wpabuf_free(cred); 1741 1742 skip_cred_build: 1743 if (wps->wps->registrar->extra_cred) { 1744 wpa_printf(MSG_DEBUG, "WPS: * Credential (pre-configured)"); 1745 wpabuf_put_buf(msg, wps->wps->registrar->extra_cred); 1746 } 1747 1748 return 0; 1749 } 1750 1751 1752 static int wps_build_ap_settings(struct wps_data *wps, struct wpabuf *msg) 1753 { 1754 wpa_printf(MSG_DEBUG, "WPS: * AP Settings"); 1755 1756 if (wps_build_credential(msg, &wps->cred)) 1757 return -1; 1758 1759 return 0; 1760 } 1761 1762 1763 static struct wpabuf * wps_build_ap_cred(struct wps_data *wps) 1764 { 1765 struct wpabuf *msg, *plain; 1766 1767 msg = wpabuf_alloc(1000); 1768 if (msg == NULL) 1769 return NULL; 1770 1771 plain = wpabuf_alloc(200); 1772 if (plain == NULL) { 1773 wpabuf_free(msg); 1774 return NULL; 1775 } 1776 1777 if (wps_build_ap_settings(wps, plain)) { 1778 wpabuf_free(plain); 1779 wpabuf_free(msg); 1780 return NULL; 1781 } 1782 1783 wpabuf_put_be16(msg, ATTR_CRED); 1784 wpabuf_put_be16(msg, wpabuf_len(plain)); 1785 wpabuf_put_buf(msg, plain); 1786 wpabuf_free(plain); 1787 1788 return msg; 1789 } 1790 1791 1792 static struct wpabuf * wps_build_m2(struct wps_data *wps) 1793 { 1794 struct wpabuf *msg; 1795 int config_in_m2 = 0; 1796 1797 if (random_get_bytes(wps->nonce_r, WPS_NONCE_LEN) < 0) 1798 return NULL; 1799 wpa_hexdump(MSG_DEBUG, "WPS: Registrar Nonce", 1800 wps->nonce_r, WPS_NONCE_LEN); 1801 wpa_hexdump(MSG_DEBUG, "WPS: UUID-R", wps->uuid_r, WPS_UUID_LEN); 1802 1803 wpa_printf(MSG_DEBUG, "WPS: Building Message M2"); 1804 msg = wpabuf_alloc(1000); 1805 if (msg == NULL) 1806 return NULL; 1807 1808 if (wps_build_version(msg) || 1809 wps_build_msg_type(msg, WPS_M2) || 1810 wps_build_enrollee_nonce(wps, msg) || 1811 wps_build_registrar_nonce(wps, msg) || 1812 wps_build_uuid_r(wps, msg) || 1813 wps_build_public_key(wps, msg) || 1814 wps_derive_keys(wps) || 1815 wps_build_auth_type_flags(wps, msg) || 1816 wps_build_encr_type_flags(wps, msg) || 1817 wps_build_conn_type_flags(wps, msg) || 1818 wps_build_config_methods_r(wps->wps->registrar, msg) || 1819 wps_build_device_attrs(&wps->wps->dev, msg) || 1820 wps_build_rf_bands(&wps->wps->dev, msg, 1821 wps->wps->rf_band_cb(wps->wps->cb_ctx)) || 1822 wps_build_assoc_state(wps, msg) || 1823 wps_build_config_error(msg, WPS_CFG_NO_ERROR) || 1824 wps_build_dev_password_id(msg, wps->dev_pw_id) || 1825 wps_build_os_version(&wps->wps->dev, msg) || 1826 wps_build_wfa_ext(msg, 0, NULL, 0)) { 1827 wpabuf_free(msg); 1828 return NULL; 1829 } 1830 1831 #ifdef CONFIG_WPS_NFC 1832 if (wps->nfc_pw_token && wps->nfc_pw_token->pk_hash_provided_oob && 1833 wps->nfc_pw_token->pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) { 1834 /* 1835 * Use abbreviated handshake since public key hash allowed 1836 * Enrollee to validate our public key similarly to how Enrollee 1837 * public key was validated. There is no need to validate Device 1838 * Password in this case. 1839 */ 1840 struct wpabuf *plain = wpabuf_alloc(500); 1841 if (plain == NULL || 1842 wps_build_cred(wps, plain) || 1843 wps_build_key_wrap_auth(wps, plain) || 1844 wps_build_encr_settings(wps, msg, plain)) { 1845 wpabuf_free(msg); 1846 wpabuf_free(plain); 1847 return NULL; 1848 } 1849 wpabuf_free(plain); 1850 config_in_m2 = 1; 1851 } 1852 #endif /* CONFIG_WPS_NFC */ 1853 1854 if (wps_build_authenticator(wps, msg)) { 1855 wpabuf_free(msg); 1856 return NULL; 1857 } 1858 1859 wps->int_reg = 1; 1860 wps->state = config_in_m2 ? RECV_DONE : RECV_M3; 1861 return msg; 1862 } 1863 1864 1865 static struct wpabuf * wps_build_m2d(struct wps_data *wps) 1866 { 1867 struct wpabuf *msg; 1868 u16 err = wps->config_error; 1869 1870 wpa_printf(MSG_DEBUG, "WPS: Building Message M2D"); 1871 msg = wpabuf_alloc(1000); 1872 if (msg == NULL) 1873 return NULL; 1874 1875 if (wps->wps->ap && wps->wps->ap_setup_locked && 1876 err == WPS_CFG_NO_ERROR) 1877 err = WPS_CFG_SETUP_LOCKED; 1878 1879 if (wps_build_version(msg) || 1880 wps_build_msg_type(msg, WPS_M2D) || 1881 wps_build_enrollee_nonce(wps, msg) || 1882 wps_build_registrar_nonce(wps, msg) || 1883 wps_build_uuid_r(wps, msg) || 1884 wps_build_auth_type_flags(wps, msg) || 1885 wps_build_encr_type_flags(wps, msg) || 1886 wps_build_conn_type_flags(wps, msg) || 1887 wps_build_config_methods_r(wps->wps->registrar, msg) || 1888 wps_build_device_attrs(&wps->wps->dev, msg) || 1889 wps_build_rf_bands(&wps->wps->dev, msg, 1890 wps->wps->rf_band_cb(wps->wps->cb_ctx)) || 1891 wps_build_assoc_state(wps, msg) || 1892 wps_build_config_error(msg, err) || 1893 wps_build_os_version(&wps->wps->dev, msg) || 1894 wps_build_wfa_ext(msg, 0, NULL, 0)) { 1895 wpabuf_free(msg); 1896 return NULL; 1897 } 1898 1899 wps->state = RECV_M2D_ACK; 1900 return msg; 1901 } 1902 1903 1904 static struct wpabuf * wps_build_m4(struct wps_data *wps) 1905 { 1906 struct wpabuf *msg, *plain; 1907 1908 wpa_printf(MSG_DEBUG, "WPS: Building Message M4"); 1909 1910 wps_derive_psk(wps, wps->dev_password, wps->dev_password_len); 1911 1912 plain = wpabuf_alloc(200); 1913 if (plain == NULL) 1914 return NULL; 1915 1916 msg = wpabuf_alloc(1000); 1917 if (msg == NULL) { 1918 wpabuf_free(plain); 1919 return NULL; 1920 } 1921 1922 if (wps_build_version(msg) || 1923 wps_build_msg_type(msg, WPS_M4) || 1924 wps_build_enrollee_nonce(wps, msg) || 1925 wps_build_r_hash(wps, msg) || 1926 wps_build_r_snonce1(wps, plain) || 1927 wps_build_key_wrap_auth(wps, plain) || 1928 wps_build_encr_settings(wps, msg, plain) || 1929 wps_build_wfa_ext(msg, 0, NULL, 0) || 1930 wps_build_authenticator(wps, msg)) { 1931 wpabuf_free(plain); 1932 wpabuf_free(msg); 1933 return NULL; 1934 } 1935 wpabuf_free(plain); 1936 1937 wps->state = RECV_M5; 1938 return msg; 1939 } 1940 1941 1942 static struct wpabuf * wps_build_m6(struct wps_data *wps) 1943 { 1944 struct wpabuf *msg, *plain; 1945 1946 wpa_printf(MSG_DEBUG, "WPS: Building Message M6"); 1947 1948 plain = wpabuf_alloc(200); 1949 if (plain == NULL) 1950 return NULL; 1951 1952 msg = wpabuf_alloc(1000); 1953 if (msg == NULL) { 1954 wpabuf_free(plain); 1955 return NULL; 1956 } 1957 1958 if (wps_build_version(msg) || 1959 wps_build_msg_type(msg, WPS_M6) || 1960 wps_build_enrollee_nonce(wps, msg) || 1961 wps_build_r_snonce2(wps, plain) || 1962 wps_build_key_wrap_auth(wps, plain) || 1963 wps_build_encr_settings(wps, msg, plain) || 1964 wps_build_wfa_ext(msg, 0, NULL, 0) || 1965 wps_build_authenticator(wps, msg)) { 1966 wpabuf_free(plain); 1967 wpabuf_free(msg); 1968 return NULL; 1969 } 1970 wpabuf_free(plain); 1971 1972 wps->wps_pin_revealed = 1; 1973 wps->state = RECV_M7; 1974 return msg; 1975 } 1976 1977 1978 static struct wpabuf * wps_build_m8(struct wps_data *wps) 1979 { 1980 struct wpabuf *msg, *plain; 1981 1982 wpa_printf(MSG_DEBUG, "WPS: Building Message M8"); 1983 1984 plain = wpabuf_alloc(500); 1985 if (plain == NULL) 1986 return NULL; 1987 1988 msg = wpabuf_alloc(1000); 1989 if (msg == NULL) { 1990 wpabuf_free(plain); 1991 return NULL; 1992 } 1993 1994 if (wps_build_version(msg) || 1995 wps_build_msg_type(msg, WPS_M8) || 1996 wps_build_enrollee_nonce(wps, msg) || 1997 ((wps->wps->ap || wps->er) && wps_build_cred(wps, plain)) || 1998 (!wps->wps->ap && !wps->er && wps_build_ap_settings(wps, plain)) || 1999 wps_build_key_wrap_auth(wps, plain) || 2000 wps_build_encr_settings(wps, msg, plain) || 2001 wps_build_wfa_ext(msg, 0, NULL, 0) || 2002 wps_build_authenticator(wps, msg)) { 2003 wpabuf_free(plain); 2004 wpabuf_free(msg); 2005 return NULL; 2006 } 2007 wpabuf_free(plain); 2008 2009 wps->state = RECV_DONE; 2010 return msg; 2011 } 2012 2013 2014 struct wpabuf * wps_registrar_get_msg(struct wps_data *wps, 2015 enum wsc_op_code *op_code) 2016 { 2017 struct wpabuf *msg; 2018 2019 #ifdef CONFIG_WPS_UPNP 2020 if (!wps->int_reg && wps->wps->wps_upnp) { 2021 struct upnp_pending_message *p, *prev = NULL; 2022 if (wps->ext_reg > 1) 2023 wps_registrar_free_pending_m2(wps->wps); 2024 p = wps->wps->upnp_msgs; 2025 /* TODO: check pending message MAC address */ 2026 while (p && p->next) { 2027 prev = p; 2028 p = p->next; 2029 } 2030 if (p) { 2031 wpa_printf(MSG_DEBUG, "WPS: Use pending message from " 2032 "UPnP"); 2033 if (prev) 2034 prev->next = NULL; 2035 else 2036 wps->wps->upnp_msgs = NULL; 2037 msg = p->msg; 2038 switch (p->type) { 2039 case WPS_WSC_ACK: 2040 *op_code = WSC_ACK; 2041 break; 2042 case WPS_WSC_NACK: 2043 *op_code = WSC_NACK; 2044 break; 2045 default: 2046 *op_code = WSC_MSG; 2047 break; 2048 } 2049 os_free(p); 2050 if (wps->ext_reg == 0) 2051 wps->ext_reg = 1; 2052 return msg; 2053 } 2054 } 2055 if (wps->ext_reg) { 2056 wpa_printf(MSG_DEBUG, "WPS: Using external Registrar, but no " 2057 "pending message available"); 2058 return NULL; 2059 } 2060 #endif /* CONFIG_WPS_UPNP */ 2061 2062 switch (wps->state) { 2063 case SEND_M2: 2064 if (wps_get_dev_password(wps) < 0) 2065 msg = wps_build_m2d(wps); 2066 else 2067 msg = wps_build_m2(wps); 2068 *op_code = WSC_MSG; 2069 break; 2070 case SEND_M2D: 2071 msg = wps_build_m2d(wps); 2072 *op_code = WSC_MSG; 2073 break; 2074 case SEND_M4: 2075 msg = wps_build_m4(wps); 2076 *op_code = WSC_MSG; 2077 break; 2078 case SEND_M6: 2079 msg = wps_build_m6(wps); 2080 *op_code = WSC_MSG; 2081 break; 2082 case SEND_M8: 2083 msg = wps_build_m8(wps); 2084 *op_code = WSC_MSG; 2085 break; 2086 case RECV_DONE: 2087 msg = wps_build_wsc_ack(wps); 2088 *op_code = WSC_ACK; 2089 break; 2090 case SEND_WSC_NACK: 2091 msg = wps_build_wsc_nack(wps); 2092 *op_code = WSC_NACK; 2093 break; 2094 default: 2095 wpa_printf(MSG_DEBUG, "WPS: Unsupported state %d for building " 2096 "a message", wps->state); 2097 msg = NULL; 2098 break; 2099 } 2100 2101 if (*op_code == WSC_MSG && msg) { 2102 /* Save a copy of the last message for Authenticator derivation 2103 */ 2104 wpabuf_free(wps->last_msg); 2105 wps->last_msg = wpabuf_dup(msg); 2106 } 2107 2108 return msg; 2109 } 2110 2111 2112 static int wps_process_enrollee_nonce(struct wps_data *wps, const u8 *e_nonce) 2113 { 2114 if (e_nonce == NULL) { 2115 wpa_printf(MSG_DEBUG, "WPS: No Enrollee Nonce received"); 2116 return -1; 2117 } 2118 2119 os_memcpy(wps->nonce_e, e_nonce, WPS_NONCE_LEN); 2120 wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce", 2121 wps->nonce_e, WPS_NONCE_LEN); 2122 2123 return 0; 2124 } 2125 2126 2127 static int wps_process_registrar_nonce(struct wps_data *wps, const u8 *r_nonce) 2128 { 2129 if (r_nonce == NULL) { 2130 wpa_printf(MSG_DEBUG, "WPS: No Registrar Nonce received"); 2131 return -1; 2132 } 2133 2134 if (os_memcmp(wps->nonce_r, r_nonce, WPS_NONCE_LEN) != 0) { 2135 wpa_printf(MSG_DEBUG, "WPS: Invalid Registrar Nonce received"); 2136 return -1; 2137 } 2138 2139 return 0; 2140 } 2141 2142 2143 static int wps_process_uuid_e(struct wps_data *wps, const u8 *uuid_e) 2144 { 2145 if (uuid_e == NULL) { 2146 wpa_printf(MSG_DEBUG, "WPS: No UUID-E received"); 2147 return -1; 2148 } 2149 2150 os_memcpy(wps->uuid_e, uuid_e, WPS_UUID_LEN); 2151 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", wps->uuid_e, WPS_UUID_LEN); 2152 2153 return 0; 2154 } 2155 2156 2157 static int wps_process_dev_password_id(struct wps_data *wps, const u8 *pw_id) 2158 { 2159 if (pw_id == NULL) { 2160 wpa_printf(MSG_DEBUG, "WPS: No Device Password ID received"); 2161 return -1; 2162 } 2163 2164 wps->dev_pw_id = WPA_GET_BE16(pw_id); 2165 wpa_printf(MSG_DEBUG, "WPS: Device Password ID %d", wps->dev_pw_id); 2166 2167 return 0; 2168 } 2169 2170 2171 static int wps_process_e_hash1(struct wps_data *wps, const u8 *e_hash1) 2172 { 2173 if (e_hash1 == NULL) { 2174 wpa_printf(MSG_DEBUG, "WPS: No E-Hash1 received"); 2175 return -1; 2176 } 2177 2178 os_memcpy(wps->peer_hash1, e_hash1, WPS_HASH_LEN); 2179 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash1", wps->peer_hash1, WPS_HASH_LEN); 2180 2181 return 0; 2182 } 2183 2184 2185 static int wps_process_e_hash2(struct wps_data *wps, const u8 *e_hash2) 2186 { 2187 if (e_hash2 == NULL) { 2188 wpa_printf(MSG_DEBUG, "WPS: No E-Hash2 received"); 2189 return -1; 2190 } 2191 2192 os_memcpy(wps->peer_hash2, e_hash2, WPS_HASH_LEN); 2193 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash2", wps->peer_hash2, WPS_HASH_LEN); 2194 2195 return 0; 2196 } 2197 2198 2199 static int wps_process_e_snonce1(struct wps_data *wps, const u8 *e_snonce1) 2200 { 2201 u8 hash[SHA256_MAC_LEN]; 2202 const u8 *addr[4]; 2203 size_t len[4]; 2204 2205 if (e_snonce1 == NULL) { 2206 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce1 received"); 2207 return -1; 2208 } 2209 2210 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce1", e_snonce1, 2211 WPS_SECRET_NONCE_LEN); 2212 2213 /* E-Hash1 = HMAC_AuthKey(E-S1 || PSK1 || PK_E || PK_R) */ 2214 addr[0] = e_snonce1; 2215 len[0] = WPS_SECRET_NONCE_LEN; 2216 addr[1] = wps->psk1; 2217 len[1] = WPS_PSK_LEN; 2218 addr[2] = wpabuf_head(wps->dh_pubkey_e); 2219 len[2] = wpabuf_len(wps->dh_pubkey_e); 2220 addr[3] = wpabuf_head(wps->dh_pubkey_r); 2221 len[3] = wpabuf_len(wps->dh_pubkey_r); 2222 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 2223 2224 if (os_memcmp(wps->peer_hash1, hash, WPS_HASH_LEN) != 0) { 2225 wpa_printf(MSG_DEBUG, "WPS: E-Hash1 derived from E-S1 does " 2226 "not match with the pre-committed value"); 2227 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE; 2228 wps_pwd_auth_fail_event(wps->wps, 0, 1, wps->mac_addr_e); 2229 return -1; 2230 } 2231 2232 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the first " 2233 "half of the device password"); 2234 2235 return 0; 2236 } 2237 2238 2239 static int wps_process_e_snonce2(struct wps_data *wps, const u8 *e_snonce2) 2240 { 2241 u8 hash[SHA256_MAC_LEN]; 2242 const u8 *addr[4]; 2243 size_t len[4]; 2244 2245 if (e_snonce2 == NULL) { 2246 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce2 received"); 2247 return -1; 2248 } 2249 2250 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce2", e_snonce2, 2251 WPS_SECRET_NONCE_LEN); 2252 2253 /* E-Hash2 = HMAC_AuthKey(E-S2 || PSK2 || PK_E || PK_R) */ 2254 addr[0] = e_snonce2; 2255 len[0] = WPS_SECRET_NONCE_LEN; 2256 addr[1] = wps->psk2; 2257 len[1] = WPS_PSK_LEN; 2258 addr[2] = wpabuf_head(wps->dh_pubkey_e); 2259 len[2] = wpabuf_len(wps->dh_pubkey_e); 2260 addr[3] = wpabuf_head(wps->dh_pubkey_r); 2261 len[3] = wpabuf_len(wps->dh_pubkey_r); 2262 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 2263 2264 if (os_memcmp(wps->peer_hash2, hash, WPS_HASH_LEN) != 0) { 2265 wpa_printf(MSG_DEBUG, "WPS: E-Hash2 derived from E-S2 does " 2266 "not match with the pre-committed value"); 2267 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e); 2268 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE; 2269 wps_pwd_auth_fail_event(wps->wps, 0, 2, wps->mac_addr_e); 2270 return -1; 2271 } 2272 2273 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the second " 2274 "half of the device password"); 2275 wps->wps_pin_revealed = 0; 2276 wps_registrar_unlock_pin(wps->wps->registrar, wps->uuid_e); 2277 2278 /* 2279 * In case wildcard PIN is used and WPS handshake succeeds in the first 2280 * attempt, wps_registrar_unlock_pin() would not free the PIN, so make 2281 * sure the PIN gets invalidated here. 2282 */ 2283 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e); 2284 2285 return 0; 2286 } 2287 2288 2289 static int wps_process_mac_addr(struct wps_data *wps, const u8 *mac_addr) 2290 { 2291 if (mac_addr == NULL) { 2292 wpa_printf(MSG_DEBUG, "WPS: No MAC Address received"); 2293 return -1; 2294 } 2295 2296 wpa_printf(MSG_DEBUG, "WPS: Enrollee MAC Address " MACSTR, 2297 MAC2STR(mac_addr)); 2298 os_memcpy(wps->mac_addr_e, mac_addr, ETH_ALEN); 2299 os_memcpy(wps->peer_dev.mac_addr, mac_addr, ETH_ALEN); 2300 2301 return 0; 2302 } 2303 2304 2305 static int wps_process_pubkey(struct wps_data *wps, const u8 *pk, 2306 size_t pk_len) 2307 { 2308 if (pk == NULL || pk_len == 0) { 2309 wpa_printf(MSG_DEBUG, "WPS: No Public Key received"); 2310 return -1; 2311 } 2312 2313 wpabuf_free(wps->dh_pubkey_e); 2314 wps->dh_pubkey_e = wpabuf_alloc_copy(pk, pk_len); 2315 if (wps->dh_pubkey_e == NULL) 2316 return -1; 2317 2318 return 0; 2319 } 2320 2321 2322 static int wps_process_auth_type_flags(struct wps_data *wps, const u8 *auth) 2323 { 2324 u16 auth_types; 2325 2326 if (auth == NULL) { 2327 wpa_printf(MSG_DEBUG, "WPS: No Authentication Type flags " 2328 "received"); 2329 return -1; 2330 } 2331 2332 auth_types = WPA_GET_BE16(auth); 2333 2334 wpa_printf(MSG_DEBUG, "WPS: Enrollee Authentication Type flags 0x%x", 2335 auth_types); 2336 wps->auth_type = wps->wps->auth_types & auth_types; 2337 if (wps->auth_type == 0) { 2338 wpa_printf(MSG_DEBUG, "WPS: No match in supported " 2339 "authentication types (own 0x%x Enrollee 0x%x)", 2340 wps->wps->auth_types, auth_types); 2341 #ifdef WPS_WORKAROUNDS 2342 /* 2343 * Some deployed implementations seem to advertise incorrect 2344 * information in this attribute. For example, Linksys WRT350N 2345 * seems to have a byteorder bug that breaks this negotiation. 2346 * In order to interoperate with existing implementations, 2347 * assume that the Enrollee supports everything we do. 2348 */ 2349 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee " 2350 "does not advertise supported authentication types " 2351 "correctly"); 2352 wps->auth_type = wps->wps->auth_types; 2353 #else /* WPS_WORKAROUNDS */ 2354 return -1; 2355 #endif /* WPS_WORKAROUNDS */ 2356 } 2357 2358 return 0; 2359 } 2360 2361 2362 static int wps_process_encr_type_flags(struct wps_data *wps, const u8 *encr) 2363 { 2364 u16 encr_types; 2365 2366 if (encr == NULL) { 2367 wpa_printf(MSG_DEBUG, "WPS: No Encryption Type flags " 2368 "received"); 2369 return -1; 2370 } 2371 2372 encr_types = WPA_GET_BE16(encr); 2373 2374 wpa_printf(MSG_DEBUG, "WPS: Enrollee Encryption Type flags 0x%x", 2375 encr_types); 2376 wps->encr_type = wps->wps->encr_types & encr_types; 2377 if (wps->encr_type == 0) { 2378 wpa_printf(MSG_DEBUG, "WPS: No match in supported " 2379 "encryption types (own 0x%x Enrollee 0x%x)", 2380 wps->wps->encr_types, encr_types); 2381 #ifdef WPS_WORKAROUNDS 2382 /* 2383 * Some deployed implementations seem to advertise incorrect 2384 * information in this attribute. For example, Linksys WRT350N 2385 * seems to have a byteorder bug that breaks this negotiation. 2386 * In order to interoperate with existing implementations, 2387 * assume that the Enrollee supports everything we do. 2388 */ 2389 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee " 2390 "does not advertise supported encryption types " 2391 "correctly"); 2392 wps->encr_type = wps->wps->encr_types; 2393 #else /* WPS_WORKAROUNDS */ 2394 return -1; 2395 #endif /* WPS_WORKAROUNDS */ 2396 } 2397 2398 return 0; 2399 } 2400 2401 2402 static int wps_process_conn_type_flags(struct wps_data *wps, const u8 *conn) 2403 { 2404 if (conn == NULL) { 2405 wpa_printf(MSG_DEBUG, "WPS: No Connection Type flags " 2406 "received"); 2407 return -1; 2408 } 2409 2410 wpa_printf(MSG_DEBUG, "WPS: Enrollee Connection Type flags 0x%x", 2411 *conn); 2412 2413 return 0; 2414 } 2415 2416 2417 static int wps_process_config_methods(struct wps_data *wps, const u8 *methods) 2418 { 2419 u16 m; 2420 2421 if (methods == NULL) { 2422 wpa_printf(MSG_DEBUG, "WPS: No Config Methods received"); 2423 return -1; 2424 } 2425 2426 m = WPA_GET_BE16(methods); 2427 2428 wpa_printf(MSG_DEBUG, "WPS: Enrollee Config Methods 0x%x" 2429 "%s%s%s%s%s%s%s%s%s", m, 2430 m & WPS_CONFIG_USBA ? " [USBA]" : "", 2431 m & WPS_CONFIG_ETHERNET ? " [Ethernet]" : "", 2432 m & WPS_CONFIG_LABEL ? " [Label]" : "", 2433 m & WPS_CONFIG_DISPLAY ? " [Display]" : "", 2434 m & WPS_CONFIG_EXT_NFC_TOKEN ? " [Ext NFC Token]" : "", 2435 m & WPS_CONFIG_INT_NFC_TOKEN ? " [Int NFC Token]" : "", 2436 m & WPS_CONFIG_NFC_INTERFACE ? " [NFC]" : "", 2437 m & WPS_CONFIG_PUSHBUTTON ? " [PBC]" : "", 2438 m & WPS_CONFIG_KEYPAD ? " [Keypad]" : ""); 2439 2440 if (!(m & WPS_CONFIG_DISPLAY) && !wps->use_psk_key) { 2441 /* 2442 * The Enrollee does not have a display so it is unlikely to be 2443 * able to show the passphrase to a user and as such, could 2444 * benefit from receiving PSK to reduce key derivation time. 2445 */ 2446 wpa_printf(MSG_DEBUG, "WPS: Prefer PSK format key due to " 2447 "Enrollee not supporting display"); 2448 wps->use_psk_key = 1; 2449 } 2450 2451 return 0; 2452 } 2453 2454 2455 static int wps_process_wps_state(struct wps_data *wps, const u8 *state) 2456 { 2457 if (state == NULL) { 2458 wpa_printf(MSG_DEBUG, "WPS: No Wi-Fi Protected Setup State " 2459 "received"); 2460 return -1; 2461 } 2462 2463 wpa_printf(MSG_DEBUG, "WPS: Enrollee Wi-Fi Protected Setup State %d", 2464 *state); 2465 2466 return 0; 2467 } 2468 2469 2470 static int wps_process_assoc_state(struct wps_data *wps, const u8 *assoc) 2471 { 2472 u16 a; 2473 2474 if (assoc == NULL) { 2475 wpa_printf(MSG_DEBUG, "WPS: No Association State received"); 2476 return -1; 2477 } 2478 2479 a = WPA_GET_BE16(assoc); 2480 wpa_printf(MSG_DEBUG, "WPS: Enrollee Association State %d", a); 2481 2482 return 0; 2483 } 2484 2485 2486 static int wps_process_config_error(struct wps_data *wps, const u8 *err) 2487 { 2488 u16 e; 2489 2490 if (err == NULL) { 2491 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error received"); 2492 return -1; 2493 } 2494 2495 e = WPA_GET_BE16(err); 2496 wpa_printf(MSG_DEBUG, "WPS: Enrollee Configuration Error %d", e); 2497 2498 return 0; 2499 } 2500 2501 2502 static int wps_registrar_p2p_dev_addr_match(struct wps_data *wps) 2503 { 2504 #ifdef CONFIG_P2P 2505 struct wps_registrar *reg = wps->wps->registrar; 2506 2507 if (is_zero_ether_addr(reg->p2p_dev_addr)) 2508 return 1; /* no filtering in use */ 2509 2510 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) != 0) { 2511 wpa_printf(MSG_DEBUG, "WPS: No match on P2P Device Address " 2512 "filtering for PBC: expected " MACSTR " was " 2513 MACSTR " - indicate PBC session overlap", 2514 MAC2STR(reg->p2p_dev_addr), 2515 MAC2STR(wps->p2p_dev_addr)); 2516 return 0; 2517 } 2518 #endif /* CONFIG_P2P */ 2519 return 1; 2520 } 2521 2522 2523 static int wps_registrar_skip_overlap(struct wps_data *wps) 2524 { 2525 #ifdef CONFIG_P2P 2526 struct wps_registrar *reg = wps->wps->registrar; 2527 2528 if (is_zero_ether_addr(reg->p2p_dev_addr)) 2529 return 0; /* no specific Enrollee selected */ 2530 2531 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) == 0) { 2532 wpa_printf(MSG_DEBUG, "WPS: Skip PBC overlap due to selected " 2533 "Enrollee match"); 2534 return 1; 2535 } 2536 #endif /* CONFIG_P2P */ 2537 return 0; 2538 } 2539 2540 2541 static enum wps_process_res wps_process_m1(struct wps_data *wps, 2542 struct wps_parse_attr *attr) 2543 { 2544 wpa_printf(MSG_DEBUG, "WPS: Received M1"); 2545 2546 if (wps->state != RECV_M1) { 2547 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2548 "receiving M1", wps->state); 2549 return WPS_FAILURE; 2550 } 2551 2552 if (wps_process_uuid_e(wps, attr->uuid_e) || 2553 wps_process_mac_addr(wps, attr->mac_addr) || 2554 wps_process_enrollee_nonce(wps, attr->enrollee_nonce) || 2555 wps_process_pubkey(wps, attr->public_key, attr->public_key_len) || 2556 wps_process_auth_type_flags(wps, attr->auth_type_flags) || 2557 wps_process_encr_type_flags(wps, attr->encr_type_flags) || 2558 wps_process_conn_type_flags(wps, attr->conn_type_flags) || 2559 wps_process_config_methods(wps, attr->config_methods) || 2560 wps_process_wps_state(wps, attr->wps_state) || 2561 wps_process_device_attrs(&wps->peer_dev, attr) || 2562 wps_process_rf_bands(&wps->peer_dev, attr->rf_bands) || 2563 wps_process_assoc_state(wps, attr->assoc_state) || 2564 wps_process_dev_password_id(wps, attr->dev_password_id) || 2565 wps_process_config_error(wps, attr->config_error) || 2566 wps_process_os_version(&wps->peer_dev, attr->os_version)) 2567 return WPS_FAILURE; 2568 2569 if (wps->dev_pw_id < 0x10 && 2570 wps->dev_pw_id != DEV_PW_DEFAULT && 2571 wps->dev_pw_id != DEV_PW_USER_SPECIFIED && 2572 wps->dev_pw_id != DEV_PW_MACHINE_SPECIFIED && 2573 wps->dev_pw_id != DEV_PW_REGISTRAR_SPECIFIED && 2574 #ifdef CONFIG_WPS_NFC 2575 wps->dev_pw_id != DEV_PW_NFC_CONNECTION_HANDOVER && 2576 #endif /* CONFIG_WPS_NFC */ 2577 (wps->dev_pw_id != DEV_PW_PUSHBUTTON || 2578 !wps->wps->registrar->pbc)) { 2579 wpa_printf(MSG_DEBUG, "WPS: Unsupported Device Password ID %d", 2580 wps->dev_pw_id); 2581 wps->state = SEND_M2D; 2582 return WPS_CONTINUE; 2583 } 2584 2585 #ifdef CONFIG_WPS_NFC 2586 if (wps->dev_pw_id >= 0x10 || 2587 wps->dev_pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) { 2588 struct wps_nfc_pw_token *token; 2589 const u8 *addr[1]; 2590 u8 hash[WPS_HASH_LEN]; 2591 2592 wpa_printf(MSG_DEBUG, "WPS: Searching for NFC token match for id=%d (ctx %p registrar %p)", 2593 wps->dev_pw_id, wps->wps, wps->wps->registrar); 2594 token = wps_get_nfc_pw_token( 2595 &wps->wps->registrar->nfc_pw_tokens, wps->dev_pw_id); 2596 if (token && token->peer_pk_hash_known) { 2597 wpa_printf(MSG_DEBUG, "WPS: Found matching NFC " 2598 "Password Token"); 2599 dl_list_del(&token->list); 2600 wps->nfc_pw_token = token; 2601 2602 addr[0] = attr->public_key; 2603 sha256_vector(1, addr, &attr->public_key_len, hash); 2604 if (os_memcmp(hash, wps->nfc_pw_token->pubkey_hash, 2605 WPS_OOB_PUBKEY_HASH_LEN) != 0) { 2606 wpa_printf(MSG_ERROR, "WPS: Public Key hash " 2607 "mismatch"); 2608 wps->state = SEND_M2D; 2609 wps->config_error = 2610 WPS_CFG_PUBLIC_KEY_HASH_MISMATCH; 2611 return WPS_CONTINUE; 2612 } 2613 } else if (token) { 2614 wpa_printf(MSG_DEBUG, "WPS: Found matching NFC " 2615 "Password Token (no peer PK hash)"); 2616 wps->nfc_pw_token = token; 2617 } else if (wps->dev_pw_id >= 0x10 && 2618 wps->wps->ap_nfc_dev_pw_id == wps->dev_pw_id && 2619 wps->wps->ap_nfc_dev_pw) { 2620 wpa_printf(MSG_DEBUG, "WPS: Found match with own NFC Password Token"); 2621 } 2622 } 2623 #endif /* CONFIG_WPS_NFC */ 2624 2625 if (wps->dev_pw_id == DEV_PW_PUSHBUTTON) { 2626 if ((wps->wps->registrar->force_pbc_overlap || 2627 wps_registrar_pbc_overlap(wps->wps->registrar, 2628 wps->mac_addr_e, wps->uuid_e) || 2629 !wps_registrar_p2p_dev_addr_match(wps)) && 2630 !wps_registrar_skip_overlap(wps)) { 2631 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - deny PBC " 2632 "negotiation"); 2633 wps->state = SEND_M2D; 2634 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2635 wps_pbc_overlap_event(wps->wps); 2636 wps_fail_event(wps->wps, WPS_M1, 2637 WPS_CFG_MULTIPLE_PBC_DETECTED, 2638 WPS_EI_NO_ERROR, wps->mac_addr_e); 2639 wps->wps->registrar->force_pbc_overlap = 1; 2640 return WPS_CONTINUE; 2641 } 2642 wps_registrar_add_pbc_session(wps->wps->registrar, 2643 wps->mac_addr_e, wps->uuid_e); 2644 wps->pbc = 1; 2645 } 2646 2647 #ifdef WPS_WORKAROUNDS 2648 /* 2649 * It looks like Mac OS X 10.6.3 and 10.6.4 do not like Network Key in 2650 * passphrase format. To avoid interop issues, force PSK format to be 2651 * used. 2652 */ 2653 if (!wps->use_psk_key && 2654 wps->peer_dev.manufacturer && 2655 os_strncmp(wps->peer_dev.manufacturer, "Apple ", 6) == 0 && 2656 wps->peer_dev.model_name && 2657 os_strcmp(wps->peer_dev.model_name, "AirPort") == 0) { 2658 wpa_printf(MSG_DEBUG, "WPS: Workaround - Force Network Key in " 2659 "PSK format"); 2660 wps->use_psk_key = 1; 2661 } 2662 #endif /* WPS_WORKAROUNDS */ 2663 2664 wps->state = SEND_M2; 2665 return WPS_CONTINUE; 2666 } 2667 2668 2669 static enum wps_process_res wps_process_m3(struct wps_data *wps, 2670 const struct wpabuf *msg, 2671 struct wps_parse_attr *attr) 2672 { 2673 wpa_printf(MSG_DEBUG, "WPS: Received M3"); 2674 2675 if (wps->state != RECV_M3) { 2676 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2677 "receiving M3", wps->state); 2678 wps->state = SEND_WSC_NACK; 2679 return WPS_CONTINUE; 2680 } 2681 2682 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2683 !wps_registrar_skip_overlap(wps)) { 2684 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2685 "session overlap"); 2686 wps->state = SEND_WSC_NACK; 2687 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2688 return WPS_CONTINUE; 2689 } 2690 2691 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2692 wps_process_authenticator(wps, attr->authenticator, msg) || 2693 wps_process_e_hash1(wps, attr->e_hash1) || 2694 wps_process_e_hash2(wps, attr->e_hash2)) { 2695 wps->state = SEND_WSC_NACK; 2696 return WPS_CONTINUE; 2697 } 2698 2699 wps->state = SEND_M4; 2700 return WPS_CONTINUE; 2701 } 2702 2703 2704 static enum wps_process_res wps_process_m5(struct wps_data *wps, 2705 const struct wpabuf *msg, 2706 struct wps_parse_attr *attr) 2707 { 2708 struct wpabuf *decrypted; 2709 struct wps_parse_attr eattr; 2710 2711 wpa_printf(MSG_DEBUG, "WPS: Received M5"); 2712 2713 if (wps->state != RECV_M5) { 2714 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2715 "receiving M5", wps->state); 2716 wps->state = SEND_WSC_NACK; 2717 return WPS_CONTINUE; 2718 } 2719 2720 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2721 !wps_registrar_skip_overlap(wps)) { 2722 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2723 "session overlap"); 2724 wps->state = SEND_WSC_NACK; 2725 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2726 return WPS_CONTINUE; 2727 } 2728 2729 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2730 wps_process_authenticator(wps, attr->authenticator, msg)) { 2731 wps->state = SEND_WSC_NACK; 2732 return WPS_CONTINUE; 2733 } 2734 2735 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings, 2736 attr->encr_settings_len); 2737 if (decrypted == NULL) { 2738 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted " 2739 "Settings attribute"); 2740 wps->state = SEND_WSC_NACK; 2741 return WPS_CONTINUE; 2742 } 2743 2744 if (wps_validate_m5_encr(decrypted, attr->version2 != NULL) < 0) { 2745 wpabuf_free(decrypted); 2746 wps->state = SEND_WSC_NACK; 2747 return WPS_CONTINUE; 2748 } 2749 2750 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings " 2751 "attribute"); 2752 if (wps_parse_msg(decrypted, &eattr) < 0 || 2753 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) || 2754 wps_process_e_snonce1(wps, eattr.e_snonce1)) { 2755 wpabuf_free(decrypted); 2756 wps->state = SEND_WSC_NACK; 2757 return WPS_CONTINUE; 2758 } 2759 wpabuf_free(decrypted); 2760 2761 wps->state = SEND_M6; 2762 return WPS_CONTINUE; 2763 } 2764 2765 2766 static void wps_sta_cred_cb(struct wps_data *wps) 2767 { 2768 /* 2769 * Update credential to only include a single authentication and 2770 * encryption type in case the AP configuration includes more than one 2771 * option. 2772 */ 2773 if (wps->cred.auth_type & WPS_AUTH_WPA2PSK) 2774 wps->cred.auth_type = WPS_AUTH_WPA2PSK; 2775 else if (wps->cred.auth_type & WPS_AUTH_WPAPSK) 2776 wps->cred.auth_type = WPS_AUTH_WPAPSK; 2777 if (wps->cred.encr_type & WPS_ENCR_AES) 2778 wps->cred.encr_type = WPS_ENCR_AES; 2779 else if (wps->cred.encr_type & WPS_ENCR_TKIP) 2780 wps->cred.encr_type = WPS_ENCR_TKIP; 2781 wpa_printf(MSG_DEBUG, "WPS: Update local configuration based on the " 2782 "AP configuration"); 2783 if (wps->wps->cred_cb) 2784 wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred); 2785 } 2786 2787 2788 static void wps_cred_update(struct wps_credential *dst, 2789 struct wps_credential *src) 2790 { 2791 os_memcpy(dst->ssid, src->ssid, sizeof(dst->ssid)); 2792 dst->ssid_len = src->ssid_len; 2793 dst->auth_type = src->auth_type; 2794 dst->encr_type = src->encr_type; 2795 dst->key_idx = src->key_idx; 2796 os_memcpy(dst->key, src->key, sizeof(dst->key)); 2797 dst->key_len = src->key_len; 2798 } 2799 2800 2801 static int wps_process_ap_settings_r(struct wps_data *wps, 2802 struct wps_parse_attr *attr) 2803 { 2804 struct wpabuf *msg; 2805 2806 if (wps->wps->ap || wps->er) 2807 return 0; 2808 2809 /* AP Settings Attributes in M7 when Enrollee is an AP */ 2810 if (wps_process_ap_settings(attr, &wps->cred) < 0) 2811 return -1; 2812 2813 wpa_printf(MSG_INFO, "WPS: Received old AP configuration from AP"); 2814 2815 if (wps->new_ap_settings) { 2816 wpa_printf(MSG_INFO, "WPS: Update AP configuration based on " 2817 "new settings"); 2818 wps_cred_update(&wps->cred, wps->new_ap_settings); 2819 return 0; 2820 } else { 2821 /* 2822 * Use the AP PIN only to receive the current AP settings, not 2823 * to reconfigure the AP. 2824 */ 2825 2826 /* 2827 * Clear selected registrar here since we do not get to 2828 * WSC_Done in this protocol run. 2829 */ 2830 wps_registrar_pin_completed(wps->wps->registrar); 2831 2832 msg = wps_build_ap_cred(wps); 2833 if (msg == NULL) 2834 return -1; 2835 wps->cred.cred_attr = wpabuf_head(msg); 2836 wps->cred.cred_attr_len = wpabuf_len(msg); 2837 2838 if (wps->ap_settings_cb) { 2839 wps->ap_settings_cb(wps->ap_settings_cb_ctx, 2840 &wps->cred); 2841 wpabuf_free(msg); 2842 return 1; 2843 } 2844 wps_sta_cred_cb(wps); 2845 2846 wps->cred.cred_attr = NULL; 2847 wps->cred.cred_attr_len = 0; 2848 wpabuf_free(msg); 2849 2850 return 1; 2851 } 2852 } 2853 2854 2855 static enum wps_process_res wps_process_m7(struct wps_data *wps, 2856 const struct wpabuf *msg, 2857 struct wps_parse_attr *attr) 2858 { 2859 struct wpabuf *decrypted; 2860 struct wps_parse_attr eattr; 2861 2862 wpa_printf(MSG_DEBUG, "WPS: Received M7"); 2863 2864 if (wps->state != RECV_M7) { 2865 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2866 "receiving M7", wps->state); 2867 wps->state = SEND_WSC_NACK; 2868 return WPS_CONTINUE; 2869 } 2870 2871 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2872 !wps_registrar_skip_overlap(wps)) { 2873 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2874 "session overlap"); 2875 wps->state = SEND_WSC_NACK; 2876 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2877 return WPS_CONTINUE; 2878 } 2879 2880 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2881 wps_process_authenticator(wps, attr->authenticator, msg)) { 2882 wps->state = SEND_WSC_NACK; 2883 return WPS_CONTINUE; 2884 } 2885 2886 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings, 2887 attr->encr_settings_len); 2888 if (decrypted == NULL) { 2889 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypt Encrypted " 2890 "Settings attribute"); 2891 wps->state = SEND_WSC_NACK; 2892 return WPS_CONTINUE; 2893 } 2894 2895 if (wps_validate_m7_encr(decrypted, wps->wps->ap || wps->er, 2896 attr->version2 != NULL) < 0) { 2897 wpabuf_free(decrypted); 2898 wps->state = SEND_WSC_NACK; 2899 return WPS_CONTINUE; 2900 } 2901 2902 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings " 2903 "attribute"); 2904 if (wps_parse_msg(decrypted, &eattr) < 0 || 2905 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) || 2906 wps_process_e_snonce2(wps, eattr.e_snonce2) || 2907 wps_process_ap_settings_r(wps, &eattr)) { 2908 wpabuf_free(decrypted); 2909 wps->state = SEND_WSC_NACK; 2910 return WPS_CONTINUE; 2911 } 2912 2913 wpabuf_free(decrypted); 2914 2915 wps->state = SEND_M8; 2916 return WPS_CONTINUE; 2917 } 2918 2919 2920 static enum wps_process_res wps_process_wsc_msg(struct wps_data *wps, 2921 const struct wpabuf *msg) 2922 { 2923 struct wps_parse_attr attr; 2924 enum wps_process_res ret = WPS_CONTINUE; 2925 2926 wpa_printf(MSG_DEBUG, "WPS: Received WSC_MSG"); 2927 2928 if (wps_parse_msg(msg, &attr) < 0) 2929 return WPS_FAILURE; 2930 2931 if (attr.msg_type == NULL) { 2932 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 2933 wps->state = SEND_WSC_NACK; 2934 return WPS_CONTINUE; 2935 } 2936 2937 if (*attr.msg_type != WPS_M1 && 2938 (attr.registrar_nonce == NULL || 2939 os_memcmp(wps->nonce_r, attr.registrar_nonce, 2940 WPS_NONCE_LEN) != 0)) { 2941 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 2942 return WPS_FAILURE; 2943 } 2944 2945 switch (*attr.msg_type) { 2946 case WPS_M1: 2947 if (wps_validate_m1(msg) < 0) 2948 return WPS_FAILURE; 2949 #ifdef CONFIG_WPS_UPNP 2950 if (wps->wps->wps_upnp && attr.mac_addr) { 2951 /* Remove old pending messages when starting new run */ 2952 wps_free_pending_msgs(wps->wps->upnp_msgs); 2953 wps->wps->upnp_msgs = NULL; 2954 2955 upnp_wps_device_send_wlan_event( 2956 wps->wps->wps_upnp, attr.mac_addr, 2957 UPNP_WPS_WLANEVENT_TYPE_EAP, msg); 2958 } 2959 #endif /* CONFIG_WPS_UPNP */ 2960 ret = wps_process_m1(wps, &attr); 2961 break; 2962 case WPS_M3: 2963 if (wps_validate_m3(msg) < 0) 2964 return WPS_FAILURE; 2965 ret = wps_process_m3(wps, msg, &attr); 2966 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 2967 wps_fail_event(wps->wps, WPS_M3, wps->config_error, 2968 wps->error_indication, wps->mac_addr_e); 2969 break; 2970 case WPS_M5: 2971 if (wps_validate_m5(msg) < 0) 2972 return WPS_FAILURE; 2973 ret = wps_process_m5(wps, msg, &attr); 2974 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 2975 wps_fail_event(wps->wps, WPS_M5, wps->config_error, 2976 wps->error_indication, wps->mac_addr_e); 2977 break; 2978 case WPS_M7: 2979 if (wps_validate_m7(msg) < 0) 2980 return WPS_FAILURE; 2981 ret = wps_process_m7(wps, msg, &attr); 2982 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 2983 wps_fail_event(wps->wps, WPS_M7, wps->config_error, 2984 wps->error_indication, wps->mac_addr_e); 2985 break; 2986 default: 2987 wpa_printf(MSG_DEBUG, "WPS: Unsupported Message Type %d", 2988 *attr.msg_type); 2989 return WPS_FAILURE; 2990 } 2991 2992 if (ret == WPS_CONTINUE) { 2993 /* Save a copy of the last message for Authenticator derivation 2994 */ 2995 wpabuf_free(wps->last_msg); 2996 wps->last_msg = wpabuf_dup(msg); 2997 } 2998 2999 return ret; 3000 } 3001 3002 3003 static enum wps_process_res wps_process_wsc_ack(struct wps_data *wps, 3004 const struct wpabuf *msg) 3005 { 3006 struct wps_parse_attr attr; 3007 3008 wpa_printf(MSG_DEBUG, "WPS: Received WSC_ACK"); 3009 3010 if (wps_parse_msg(msg, &attr) < 0) 3011 return WPS_FAILURE; 3012 3013 if (attr.msg_type == NULL) { 3014 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3015 return WPS_FAILURE; 3016 } 3017 3018 if (*attr.msg_type != WPS_WSC_ACK) { 3019 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 3020 *attr.msg_type); 3021 return WPS_FAILURE; 3022 } 3023 3024 #ifdef CONFIG_WPS_UPNP 3025 if (wps->wps->wps_upnp && wps->ext_reg && wps->state == RECV_M2D_ACK && 3026 upnp_wps_subscribers(wps->wps->wps_upnp)) { 3027 if (wps->wps->upnp_msgs) 3028 return WPS_CONTINUE; 3029 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an " 3030 "external Registrar"); 3031 return WPS_PENDING; 3032 } 3033 #endif /* CONFIG_WPS_UPNP */ 3034 3035 if (attr.registrar_nonce == NULL || 3036 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 3037 { 3038 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3039 return WPS_FAILURE; 3040 } 3041 3042 if (attr.enrollee_nonce == NULL || 3043 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 3044 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 3045 return WPS_FAILURE; 3046 } 3047 3048 if (wps->state == RECV_M2D_ACK) { 3049 #ifdef CONFIG_WPS_UPNP 3050 if (wps->wps->wps_upnp && 3051 upnp_wps_subscribers(wps->wps->wps_upnp)) { 3052 if (wps->wps->upnp_msgs) 3053 return WPS_CONTINUE; 3054 if (wps->ext_reg == 0) 3055 wps->ext_reg = 1; 3056 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an " 3057 "external Registrar"); 3058 return WPS_PENDING; 3059 } 3060 #endif /* CONFIG_WPS_UPNP */ 3061 3062 wpa_printf(MSG_DEBUG, "WPS: No more registrars available - " 3063 "terminate negotiation"); 3064 } 3065 3066 return WPS_FAILURE; 3067 } 3068 3069 3070 static enum wps_process_res wps_process_wsc_nack(struct wps_data *wps, 3071 const struct wpabuf *msg) 3072 { 3073 struct wps_parse_attr attr; 3074 int old_state; 3075 u16 config_error; 3076 3077 wpa_printf(MSG_DEBUG, "WPS: Received WSC_NACK"); 3078 3079 old_state = wps->state; 3080 wps->state = SEND_WSC_NACK; 3081 3082 if (wps_parse_msg(msg, &attr) < 0) 3083 return WPS_FAILURE; 3084 3085 if (attr.msg_type == NULL) { 3086 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3087 return WPS_FAILURE; 3088 } 3089 3090 if (*attr.msg_type != WPS_WSC_NACK) { 3091 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 3092 *attr.msg_type); 3093 return WPS_FAILURE; 3094 } 3095 3096 #ifdef CONFIG_WPS_UPNP 3097 if (wps->wps->wps_upnp && wps->ext_reg) { 3098 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external " 3099 "Registrar terminated by the Enrollee"); 3100 return WPS_FAILURE; 3101 } 3102 #endif /* CONFIG_WPS_UPNP */ 3103 3104 if (attr.registrar_nonce == NULL || 3105 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 3106 { 3107 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3108 return WPS_FAILURE; 3109 } 3110 3111 if (attr.enrollee_nonce == NULL || 3112 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 3113 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 3114 return WPS_FAILURE; 3115 } 3116 3117 if (attr.config_error == NULL) { 3118 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error attribute " 3119 "in WSC_NACK"); 3120 return WPS_FAILURE; 3121 } 3122 3123 config_error = WPA_GET_BE16(attr.config_error); 3124 wpa_printf(MSG_DEBUG, "WPS: Enrollee terminated negotiation with " 3125 "Configuration Error %d", config_error); 3126 3127 switch (old_state) { 3128 case RECV_M3: 3129 wps_fail_event(wps->wps, WPS_M2, config_error, 3130 wps->error_indication, wps->mac_addr_e); 3131 break; 3132 case RECV_M5: 3133 wps_fail_event(wps->wps, WPS_M4, config_error, 3134 wps->error_indication, wps->mac_addr_e); 3135 break; 3136 case RECV_M7: 3137 wps_fail_event(wps->wps, WPS_M6, config_error, 3138 wps->error_indication, wps->mac_addr_e); 3139 break; 3140 case RECV_DONE: 3141 wps_fail_event(wps->wps, WPS_M8, config_error, 3142 wps->error_indication, wps->mac_addr_e); 3143 break; 3144 default: 3145 break; 3146 } 3147 3148 return WPS_FAILURE; 3149 } 3150 3151 3152 static enum wps_process_res wps_process_wsc_done(struct wps_data *wps, 3153 const struct wpabuf *msg) 3154 { 3155 struct wps_parse_attr attr; 3156 3157 wpa_printf(MSG_DEBUG, "WPS: Received WSC_Done"); 3158 3159 if (wps->state != RECV_DONE && 3160 (!wps->wps->wps_upnp || !wps->ext_reg)) { 3161 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 3162 "receiving WSC_Done", wps->state); 3163 return WPS_FAILURE; 3164 } 3165 3166 if (wps_parse_msg(msg, &attr) < 0) 3167 return WPS_FAILURE; 3168 3169 if (attr.msg_type == NULL) { 3170 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3171 return WPS_FAILURE; 3172 } 3173 3174 if (*attr.msg_type != WPS_WSC_DONE) { 3175 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 3176 *attr.msg_type); 3177 return WPS_FAILURE; 3178 } 3179 3180 #ifdef CONFIG_WPS_UPNP 3181 if (wps->wps->wps_upnp && wps->ext_reg) { 3182 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external " 3183 "Registrar completed successfully"); 3184 wps_device_store(wps->wps->registrar, &wps->peer_dev, 3185 wps->uuid_e); 3186 return WPS_DONE; 3187 } 3188 #endif /* CONFIG_WPS_UPNP */ 3189 3190 if (attr.registrar_nonce == NULL || 3191 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 3192 { 3193 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3194 return WPS_FAILURE; 3195 } 3196 3197 if (attr.enrollee_nonce == NULL || 3198 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 3199 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 3200 return WPS_FAILURE; 3201 } 3202 3203 wpa_printf(MSG_DEBUG, "WPS: Negotiation completed successfully"); 3204 wps_device_store(wps->wps->registrar, &wps->peer_dev, 3205 wps->uuid_e); 3206 3207 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->new_psk && 3208 wps->wps->ap && !wps->wps->registrar->disable_auto_conf) { 3209 struct wps_credential cred; 3210 3211 wpa_printf(MSG_DEBUG, "WPS: Moving to Configured state based " 3212 "on first Enrollee connection"); 3213 3214 os_memset(&cred, 0, sizeof(cred)); 3215 os_memcpy(cred.ssid, wps->wps->ssid, wps->wps->ssid_len); 3216 cred.ssid_len = wps->wps->ssid_len; 3217 cred.auth_type = WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK; 3218 cred.encr_type = WPS_ENCR_TKIP | WPS_ENCR_AES; 3219 os_memcpy(cred.key, wps->new_psk, wps->new_psk_len); 3220 cred.key_len = wps->new_psk_len; 3221 3222 wps->wps->wps_state = WPS_STATE_CONFIGURED; 3223 wpa_hexdump_ascii_key(MSG_DEBUG, 3224 "WPS: Generated random passphrase", 3225 wps->new_psk, wps->new_psk_len); 3226 if (wps->wps->cred_cb) 3227 wps->wps->cred_cb(wps->wps->cb_ctx, &cred); 3228 3229 os_free(wps->new_psk); 3230 wps->new_psk = NULL; 3231 } 3232 3233 if (!wps->wps->ap && !wps->er) 3234 wps_sta_cred_cb(wps); 3235 3236 if (wps->new_psk) { 3237 if (wps_cb_new_psk(wps->wps->registrar, wps->mac_addr_e, 3238 wps->p2p_dev_addr, wps->new_psk, 3239 wps->new_psk_len)) { 3240 wpa_printf(MSG_DEBUG, "WPS: Failed to configure the " 3241 "new PSK"); 3242 } 3243 os_free(wps->new_psk); 3244 wps->new_psk = NULL; 3245 } 3246 3247 wps_cb_reg_success(wps->wps->registrar, wps->mac_addr_e, wps->uuid_e, 3248 wps->dev_password, wps->dev_password_len); 3249 3250 if (wps->pbc) { 3251 wps_registrar_remove_pbc_session(wps->wps->registrar, 3252 wps->uuid_e, 3253 wps->p2p_dev_addr); 3254 wps_registrar_pbc_completed(wps->wps->registrar); 3255 #ifdef WPS_WORKAROUNDS 3256 os_get_reltime(&wps->wps->registrar->pbc_ignore_start); 3257 #endif /* WPS_WORKAROUNDS */ 3258 os_memcpy(wps->wps->registrar->pbc_ignore_uuid, wps->uuid_e, 3259 WPS_UUID_LEN); 3260 } else { 3261 wps_registrar_pin_completed(wps->wps->registrar); 3262 } 3263 /* TODO: maintain AuthorizedMACs somewhere separately for each ER and 3264 * merge them into APs own list.. */ 3265 3266 wps_success_event(wps->wps, wps->mac_addr_e); 3267 3268 return WPS_DONE; 3269 } 3270 3271 3272 enum wps_process_res wps_registrar_process_msg(struct wps_data *wps, 3273 enum wsc_op_code op_code, 3274 const struct wpabuf *msg) 3275 { 3276 enum wps_process_res ret; 3277 3278 wpa_printf(MSG_DEBUG, "WPS: Processing received message (len=%lu " 3279 "op_code=%d)", 3280 (unsigned long) wpabuf_len(msg), op_code); 3281 3282 #ifdef CONFIG_WPS_UPNP 3283 if (wps->wps->wps_upnp && op_code == WSC_MSG && wps->ext_reg == 1) { 3284 struct wps_parse_attr attr; 3285 if (wps_parse_msg(msg, &attr) == 0 && attr.msg_type && 3286 *attr.msg_type == WPS_M3) 3287 wps->ext_reg = 2; /* past M2/M2D phase */ 3288 } 3289 if (wps->ext_reg > 1) 3290 wps_registrar_free_pending_m2(wps->wps); 3291 if (wps->wps->wps_upnp && wps->ext_reg && 3292 wps->wps->upnp_msgs == NULL && 3293 (op_code == WSC_MSG || op_code == WSC_Done || op_code == WSC_NACK)) 3294 { 3295 struct wps_parse_attr attr; 3296 int type; 3297 if (wps_parse_msg(msg, &attr) < 0 || attr.msg_type == NULL) 3298 type = -1; 3299 else 3300 type = *attr.msg_type; 3301 wpa_printf(MSG_DEBUG, "WPS: Sending received message (type %d)" 3302 " to external Registrar for processing", type); 3303 upnp_wps_device_send_wlan_event(wps->wps->wps_upnp, 3304 wps->mac_addr_e, 3305 UPNP_WPS_WLANEVENT_TYPE_EAP, 3306 msg); 3307 if (op_code == WSC_MSG) 3308 return WPS_PENDING; 3309 } else if (wps->wps->wps_upnp && wps->ext_reg && op_code == WSC_MSG) { 3310 wpa_printf(MSG_DEBUG, "WPS: Skip internal processing - using " 3311 "external Registrar"); 3312 return WPS_CONTINUE; 3313 } 3314 #endif /* CONFIG_WPS_UPNP */ 3315 3316 switch (op_code) { 3317 case WSC_MSG: 3318 return wps_process_wsc_msg(wps, msg); 3319 case WSC_ACK: 3320 if (wps_validate_wsc_ack(msg) < 0) 3321 return WPS_FAILURE; 3322 return wps_process_wsc_ack(wps, msg); 3323 case WSC_NACK: 3324 if (wps_validate_wsc_nack(msg) < 0) 3325 return WPS_FAILURE; 3326 return wps_process_wsc_nack(wps, msg); 3327 case WSC_Done: 3328 if (wps_validate_wsc_done(msg) < 0) 3329 return WPS_FAILURE; 3330 ret = wps_process_wsc_done(wps, msg); 3331 if (ret == WPS_FAILURE) { 3332 wps->state = SEND_WSC_NACK; 3333 wps_fail_event(wps->wps, WPS_WSC_DONE, 3334 wps->config_error, 3335 wps->error_indication, wps->mac_addr_e); 3336 } 3337 return ret; 3338 default: 3339 wpa_printf(MSG_DEBUG, "WPS: Unsupported op_code %d", op_code); 3340 return WPS_FAILURE; 3341 } 3342 } 3343 3344 3345 int wps_registrar_update_ie(struct wps_registrar *reg) 3346 { 3347 return wps_set_ie(reg); 3348 } 3349 3350 3351 static void wps_registrar_set_selected_timeout(void *eloop_ctx, 3352 void *timeout_ctx) 3353 { 3354 struct wps_registrar *reg = eloop_ctx; 3355 3356 wpa_printf(MSG_DEBUG, "WPS: Selected Registrar timeout - " 3357 "unselect internal Registrar"); 3358 reg->selected_registrar = 0; 3359 reg->pbc = 0; 3360 wps_registrar_selected_registrar_changed(reg, 0); 3361 } 3362 3363 3364 #ifdef CONFIG_WPS_UPNP 3365 static void wps_registrar_sel_reg_add(struct wps_registrar *reg, 3366 struct subscription *s) 3367 { 3368 int i, j; 3369 wpa_printf(MSG_DEBUG, "WPS: External Registrar selected (dev_pw_id=%d " 3370 "config_methods=0x%x)", 3371 s->dev_password_id, s->config_methods); 3372 reg->sel_reg_union = 1; 3373 if (reg->sel_reg_dev_password_id_override != DEV_PW_PUSHBUTTON) 3374 reg->sel_reg_dev_password_id_override = s->dev_password_id; 3375 if (reg->sel_reg_config_methods_override == -1) 3376 reg->sel_reg_config_methods_override = 0; 3377 reg->sel_reg_config_methods_override |= s->config_methods; 3378 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) 3379 if (is_zero_ether_addr(reg->authorized_macs_union[i])) 3380 break; 3381 for (j = 0; i < WPS_MAX_AUTHORIZED_MACS && j < WPS_MAX_AUTHORIZED_MACS; 3382 j++) { 3383 if (is_zero_ether_addr(s->authorized_macs[j])) 3384 break; 3385 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC into union: " 3386 MACSTR, MAC2STR(s->authorized_macs[j])); 3387 os_memcpy(reg->authorized_macs_union[i], 3388 s->authorized_macs[j], ETH_ALEN); 3389 i++; 3390 } 3391 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union", 3392 (u8 *) reg->authorized_macs_union, 3393 sizeof(reg->authorized_macs_union)); 3394 } 3395 #endif /* CONFIG_WPS_UPNP */ 3396 3397 3398 static void wps_registrar_sel_reg_union(struct wps_registrar *reg) 3399 { 3400 #ifdef CONFIG_WPS_UPNP 3401 struct subscription *s; 3402 3403 if (reg->wps->wps_upnp == NULL) 3404 return; 3405 3406 dl_list_for_each(s, ®->wps->wps_upnp->subscriptions, 3407 struct subscription, list) { 3408 struct subscr_addr *sa; 3409 sa = dl_list_first(&s->addr_list, struct subscr_addr, list); 3410 if (sa) { 3411 wpa_printf(MSG_DEBUG, "WPS: External Registrar %s:%d", 3412 inet_ntoa(sa->saddr.sin_addr), 3413 ntohs(sa->saddr.sin_port)); 3414 } 3415 if (s->selected_registrar) 3416 wps_registrar_sel_reg_add(reg, s); 3417 else 3418 wpa_printf(MSG_DEBUG, "WPS: External Registrar not " 3419 "selected"); 3420 } 3421 #endif /* CONFIG_WPS_UPNP */ 3422 } 3423 3424 3425 /** 3426 * wps_registrar_selected_registrar_changed - SetSelectedRegistrar change 3427 * @reg: Registrar data from wps_registrar_init() 3428 * 3429 * This function is called when selected registrar state changes, e.g., when an 3430 * AP receives a SetSelectedRegistrar UPnP message. 3431 */ 3432 void wps_registrar_selected_registrar_changed(struct wps_registrar *reg, 3433 u16 dev_pw_id) 3434 { 3435 wpa_printf(MSG_DEBUG, "WPS: Selected registrar information changed"); 3436 3437 reg->sel_reg_union = reg->selected_registrar; 3438 reg->sel_reg_dev_password_id_override = -1; 3439 reg->sel_reg_config_methods_override = -1; 3440 os_memcpy(reg->authorized_macs_union, reg->authorized_macs, 3441 WPS_MAX_AUTHORIZED_MACS * ETH_ALEN); 3442 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union (start with own)", 3443 (u8 *) reg->authorized_macs_union, 3444 sizeof(reg->authorized_macs_union)); 3445 if (reg->selected_registrar) { 3446 u16 methods; 3447 3448 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 3449 #ifdef CONFIG_WPS2 3450 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 3451 WPS_CONFIG_PHY_PUSHBUTTON); 3452 #endif /* CONFIG_WPS2 */ 3453 if (reg->pbc) { 3454 reg->sel_reg_dev_password_id_override = 3455 DEV_PW_PUSHBUTTON; 3456 wps_set_pushbutton(&methods, reg->wps->config_methods); 3457 } else if (dev_pw_id) 3458 reg->sel_reg_dev_password_id_override = dev_pw_id; 3459 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar selected " 3460 "(pbc=%d)", reg->pbc); 3461 reg->sel_reg_config_methods_override = methods; 3462 } else 3463 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar not selected"); 3464 3465 wps_registrar_sel_reg_union(reg); 3466 3467 wps_set_ie(reg); 3468 wps_cb_set_sel_reg(reg); 3469 } 3470 3471 3472 int wps_registrar_get_info(struct wps_registrar *reg, const u8 *addr, 3473 char *buf, size_t buflen) 3474 { 3475 struct wps_registrar_device *d; 3476 int len = 0, ret; 3477 char uuid[40]; 3478 char devtype[WPS_DEV_TYPE_BUFSIZE]; 3479 3480 d = wps_device_get(reg, addr); 3481 if (d == NULL) 3482 return 0; 3483 if (uuid_bin2str(d->uuid, uuid, sizeof(uuid))) 3484 return 0; 3485 3486 ret = os_snprintf(buf + len, buflen - len, 3487 "wpsUuid=%s\n" 3488 "wpsPrimaryDeviceType=%s\n" 3489 "wpsDeviceName=%s\n" 3490 "wpsManufacturer=%s\n" 3491 "wpsModelName=%s\n" 3492 "wpsModelNumber=%s\n" 3493 "wpsSerialNumber=%s\n", 3494 uuid, 3495 wps_dev_type_bin2str(d->dev.pri_dev_type, devtype, 3496 sizeof(devtype)), 3497 d->dev.device_name ? d->dev.device_name : "", 3498 d->dev.manufacturer ? d->dev.manufacturer : "", 3499 d->dev.model_name ? d->dev.model_name : "", 3500 d->dev.model_number ? d->dev.model_number : "", 3501 d->dev.serial_number ? d->dev.serial_number : ""); 3502 if (ret < 0 || (size_t) ret >= buflen - len) 3503 return len; 3504 len += ret; 3505 3506 return len; 3507 } 3508 3509 3510 int wps_registrar_config_ap(struct wps_registrar *reg, 3511 struct wps_credential *cred) 3512 { 3513 #ifdef CONFIG_WPS2 3514 wpa_printf(MSG_DEBUG, "WPS: encr_type=0x%x", cred->encr_type); 3515 if (!(cred->encr_type & (WPS_ENCR_NONE | WPS_ENCR_TKIP | 3516 WPS_ENCR_AES))) { 3517 if (cred->encr_type & WPS_ENCR_WEP) { 3518 wpa_printf(MSG_INFO, "WPS: Reject new AP settings " 3519 "due to WEP configuration"); 3520 return -1; 3521 } 3522 3523 wpa_printf(MSG_INFO, "WPS: Reject new AP settings due to " 3524 "invalid encr_type 0x%x", cred->encr_type); 3525 return -1; 3526 } 3527 3528 if ((cred->encr_type & (WPS_ENCR_TKIP | WPS_ENCR_AES)) == 3529 WPS_ENCR_TKIP) { 3530 wpa_printf(MSG_DEBUG, "WPS: Upgrade encr_type TKIP -> " 3531 "TKIP+AES"); 3532 cred->encr_type |= WPS_ENCR_AES; 3533 } 3534 3535 if ((cred->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) == 3536 WPS_AUTH_WPAPSK) { 3537 wpa_printf(MSG_DEBUG, "WPS: Upgrade auth_type WPAPSK -> " 3538 "WPAPSK+WPA2PSK"); 3539 cred->auth_type |= WPS_AUTH_WPA2PSK; 3540 } 3541 #endif /* CONFIG_WPS2 */ 3542 3543 if (reg->wps->cred_cb) 3544 return reg->wps->cred_cb(reg->wps->cb_ctx, cred); 3545 3546 return -1; 3547 } 3548 3549 3550 #ifdef CONFIG_WPS_NFC 3551 3552 int wps_registrar_add_nfc_pw_token(struct wps_registrar *reg, 3553 const u8 *pubkey_hash, u16 pw_id, 3554 const u8 *dev_pw, size_t dev_pw_len, 3555 int pk_hash_provided_oob) 3556 { 3557 struct wps_nfc_pw_token *token; 3558 3559 if (dev_pw_len > WPS_OOB_DEVICE_PASSWORD_LEN) 3560 return -1; 3561 3562 if (pw_id == DEV_PW_NFC_CONNECTION_HANDOVER && 3563 (pubkey_hash == NULL || !pk_hash_provided_oob)) { 3564 wpa_printf(MSG_DEBUG, "WPS: Unexpected NFC Password Token " 3565 "addition - missing public key hash"); 3566 return -1; 3567 } 3568 3569 wps_free_nfc_pw_tokens(®->nfc_pw_tokens, pw_id); 3570 3571 token = os_zalloc(sizeof(*token)); 3572 if (token == NULL) 3573 return -1; 3574 3575 token->peer_pk_hash_known = pubkey_hash != NULL; 3576 if (pubkey_hash) 3577 os_memcpy(token->pubkey_hash, pubkey_hash, 3578 WPS_OOB_PUBKEY_HASH_LEN); 3579 token->pw_id = pw_id; 3580 token->pk_hash_provided_oob = pk_hash_provided_oob; 3581 if (dev_pw) { 3582 wpa_snprintf_hex_uppercase((char *) token->dev_pw, 3583 sizeof(token->dev_pw), 3584 dev_pw, dev_pw_len); 3585 token->dev_pw_len = dev_pw_len * 2; 3586 } 3587 3588 dl_list_add(®->nfc_pw_tokens, &token->list); 3589 3590 reg->selected_registrar = 1; 3591 reg->pbc = 0; 3592 wps_registrar_add_authorized_mac(reg, 3593 (u8 *) "\xff\xff\xff\xff\xff\xff"); 3594 wps_registrar_selected_registrar_changed(reg, pw_id); 3595 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 3596 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, 3597 wps_registrar_set_selected_timeout, 3598 reg, NULL); 3599 3600 wpa_printf(MSG_DEBUG, "WPS: Added NFC Device Password %u to Registrar", 3601 pw_id); 3602 3603 return 0; 3604 } 3605 3606 3607 int wps_registrar_add_nfc_password_token(struct wps_registrar *reg, 3608 const u8 *oob_dev_pw, 3609 size_t oob_dev_pw_len) 3610 { 3611 const u8 *pos, *hash, *dev_pw; 3612 u16 id; 3613 size_t dev_pw_len; 3614 3615 if (oob_dev_pw_len < WPS_OOB_PUBKEY_HASH_LEN + 2 || 3616 oob_dev_pw_len > WPS_OOB_PUBKEY_HASH_LEN + 2 + 3617 WPS_OOB_DEVICE_PASSWORD_LEN) 3618 return -1; 3619 3620 hash = oob_dev_pw; 3621 pos = oob_dev_pw + WPS_OOB_PUBKEY_HASH_LEN; 3622 id = WPA_GET_BE16(pos); 3623 dev_pw = pos + 2; 3624 dev_pw_len = oob_dev_pw + oob_dev_pw_len - dev_pw; 3625 3626 wpa_printf(MSG_DEBUG, "WPS: Add NFC Password Token for Password ID %u", 3627 id); 3628 3629 wpa_hexdump(MSG_DEBUG, "WPS: Public Key Hash", 3630 hash, WPS_OOB_PUBKEY_HASH_LEN); 3631 wpa_hexdump_key(MSG_DEBUG, "WPS: Device Password", dev_pw, dev_pw_len); 3632 3633 return wps_registrar_add_nfc_pw_token(reg, hash, id, dev_pw, 3634 dev_pw_len, 0); 3635 } 3636 3637 3638 void wps_registrar_remove_nfc_pw_token(struct wps_registrar *reg, 3639 struct wps_nfc_pw_token *token) 3640 { 3641 wps_registrar_remove_authorized_mac(reg, 3642 (u8 *) "\xff\xff\xff\xff\xff\xff"); 3643 wps_registrar_selected_registrar_changed(reg, 0); 3644 3645 /* 3646 * Free the NFC password token if it was used only for a single protocol 3647 * run. The static handover case uses the same password token multiple 3648 * times, so do not free that case here. 3649 */ 3650 if (token->peer_pk_hash_known) 3651 os_free(token); 3652 } 3653 3654 #endif /* CONFIG_WPS_NFC */ 3655