1 /* 2 * Wi-Fi Protected Setup - Registrar 3 * Copyright (c) 2008-2016, Jouni Malinen <j (at) w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9 #include "utils/includes.h" 10 11 #include "utils/common.h" 12 #include "utils/base64.h" 13 #include "utils/eloop.h" 14 #include "utils/uuid.h" 15 #include "utils/list.h" 16 #include "crypto/crypto.h" 17 #include "crypto/sha256.h" 18 #include "crypto/random.h" 19 #include "common/ieee802_11_defs.h" 20 #include "common/wpa_common.h" 21 #include "wps_i.h" 22 #include "wps_dev_attr.h" 23 #include "wps_upnp.h" 24 #include "wps_upnp_i.h" 25 26 #ifndef CONFIG_WPS_STRICT 27 #define WPS_WORKAROUNDS 28 #endif /* CONFIG_WPS_STRICT */ 29 30 #ifdef CONFIG_WPS_NFC 31 32 struct wps_nfc_pw_token { 33 struct dl_list list; 34 u8 pubkey_hash[WPS_OOB_PUBKEY_HASH_LEN]; 35 unsigned int peer_pk_hash_known:1; 36 u16 pw_id; 37 u8 dev_pw[WPS_OOB_DEVICE_PASSWORD_LEN * 2 + 1]; 38 size_t dev_pw_len; 39 int pk_hash_provided_oob; /* whether own PK hash was provided OOB */ 40 }; 41 42 43 static void wps_remove_nfc_pw_token(struct wps_nfc_pw_token *token) 44 { 45 dl_list_del(&token->list); 46 bin_clear_free(token, sizeof(*token)); 47 } 48 49 50 static void wps_free_nfc_pw_tokens(struct dl_list *tokens, u16 pw_id) 51 { 52 struct wps_nfc_pw_token *token, *prev; 53 dl_list_for_each_safe(token, prev, tokens, struct wps_nfc_pw_token, 54 list) { 55 if (pw_id == 0 || pw_id == token->pw_id) 56 wps_remove_nfc_pw_token(token); 57 } 58 } 59 60 61 static struct wps_nfc_pw_token * wps_get_nfc_pw_token(struct dl_list *tokens, 62 u16 pw_id) 63 { 64 struct wps_nfc_pw_token *token; 65 dl_list_for_each(token, tokens, struct wps_nfc_pw_token, list) { 66 if (pw_id == token->pw_id) 67 return token; 68 } 69 return NULL; 70 } 71 72 #else /* CONFIG_WPS_NFC */ 73 74 #define wps_free_nfc_pw_tokens(t, p) do { } while (0) 75 76 #endif /* CONFIG_WPS_NFC */ 77 78 79 struct wps_uuid_pin { 80 struct dl_list list; 81 u8 uuid[WPS_UUID_LEN]; 82 int wildcard_uuid; 83 u8 *pin; 84 size_t pin_len; 85 #define PIN_LOCKED BIT(0) 86 #define PIN_EXPIRES BIT(1) 87 int flags; 88 struct os_reltime expiration; 89 u8 enrollee_addr[ETH_ALEN]; 90 }; 91 92 93 static void wps_free_pin(struct wps_uuid_pin *pin) 94 { 95 bin_clear_free(pin->pin, pin->pin_len); 96 os_free(pin); 97 } 98 99 100 static void wps_remove_pin(struct wps_uuid_pin *pin) 101 { 102 dl_list_del(&pin->list); 103 wps_free_pin(pin); 104 } 105 106 107 static void wps_free_pins(struct dl_list *pins) 108 { 109 struct wps_uuid_pin *pin, *prev; 110 dl_list_for_each_safe(pin, prev, pins, struct wps_uuid_pin, list) 111 wps_remove_pin(pin); 112 } 113 114 115 struct wps_pbc_session { 116 struct wps_pbc_session *next; 117 u8 addr[ETH_ALEN]; 118 u8 uuid_e[WPS_UUID_LEN]; 119 struct os_reltime timestamp; 120 }; 121 122 123 static void wps_free_pbc_sessions(struct wps_pbc_session *pbc) 124 { 125 struct wps_pbc_session *prev; 126 127 while (pbc) { 128 prev = pbc; 129 pbc = pbc->next; 130 os_free(prev); 131 } 132 } 133 134 135 struct wps_registrar_device { 136 struct wps_registrar_device *next; 137 struct wps_device_data dev; 138 u8 uuid[WPS_UUID_LEN]; 139 }; 140 141 142 struct wps_registrar { 143 struct wps_context *wps; 144 145 int pbc; 146 int selected_registrar; 147 148 int (*new_psk_cb)(void *ctx, const u8 *mac_addr, const u8 *p2p_dev_addr, 149 const u8 *psk, size_t psk_len); 150 int (*set_ie_cb)(void *ctx, struct wpabuf *beacon_ie, 151 struct wpabuf *probe_resp_ie); 152 void (*pin_needed_cb)(void *ctx, const u8 *uuid_e, 153 const struct wps_device_data *dev); 154 void (*reg_success_cb)(void *ctx, const u8 *mac_addr, 155 const u8 *uuid_e, const u8 *dev_pw, 156 size_t dev_pw_len); 157 void (*set_sel_reg_cb)(void *ctx, int sel_reg, u16 dev_passwd_id, 158 u16 sel_reg_config_methods); 159 void (*enrollee_seen_cb)(void *ctx, const u8 *addr, const u8 *uuid_e, 160 const u8 *pri_dev_type, u16 config_methods, 161 u16 dev_password_id, u8 request_type, 162 const char *dev_name); 163 int (*lookup_pskfile_cb)(void *ctx, const u8 *mac_addr, const u8 **psk); 164 void *cb_ctx; 165 166 struct dl_list pins; 167 struct dl_list nfc_pw_tokens; 168 struct wps_pbc_session *pbc_sessions; 169 170 int skip_cred_build; 171 struct wpabuf *extra_cred; 172 int disable_auto_conf; 173 int sel_reg_union; 174 int sel_reg_dev_password_id_override; 175 int sel_reg_config_methods_override; 176 int dualband; 177 int force_per_enrollee_psk; 178 179 struct wps_registrar_device *devices; 180 181 int force_pbc_overlap; 182 183 u8 authorized_macs[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN]; 184 u8 authorized_macs_union[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN]; 185 186 u8 p2p_dev_addr[ETH_ALEN]; 187 188 u8 pbc_ignore_uuid[WPS_UUID_LEN]; 189 #ifdef WPS_WORKAROUNDS 190 struct os_reltime pbc_ignore_start; 191 #endif /* WPS_WORKAROUNDS */ 192 193 /** 194 * multi_ap_backhaul_ssid - SSID to supply to a Multi-AP backhaul 195 * enrollee 196 * 197 * This SSID is used by the Registrar to fill in information for 198 * Credentials when the enrollee advertises it is a Multi-AP backhaul 199 * STA. 200 */ 201 u8 multi_ap_backhaul_ssid[SSID_MAX_LEN]; 202 203 /** 204 * multi_ap_backhaul_ssid_len - Length of multi_ap_backhaul_ssid in 205 * octets 206 */ 207 size_t multi_ap_backhaul_ssid_len; 208 209 /** 210 * multi_ap_backhaul_network_key - The Network Key (PSK) for the 211 * Multi-AP backhaul enrollee. 212 * 213 * This key can be either the ASCII passphrase (8..63 characters) or the 214 * 32-octet PSK (64 hex characters). 215 */ 216 u8 *multi_ap_backhaul_network_key; 217 218 /** 219 * multi_ap_backhaul_network_key_len - Length of 220 * multi_ap_backhaul_network_key in octets 221 */ 222 size_t multi_ap_backhaul_network_key_len; 223 }; 224 225 226 static int wps_set_ie(struct wps_registrar *reg); 227 static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx); 228 static void wps_registrar_set_selected_timeout(void *eloop_ctx, 229 void *timeout_ctx); 230 static void wps_registrar_remove_pin(struct wps_registrar *reg, 231 struct wps_uuid_pin *pin); 232 233 234 static void wps_registrar_add_authorized_mac(struct wps_registrar *reg, 235 const u8 *addr) 236 { 237 int i; 238 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC " MACSTR, 239 MAC2STR(addr)); 240 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) 241 if (ether_addr_equal(reg->authorized_macs[i], addr)) { 242 wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was " 243 "already in the list"); 244 return; /* already in list */ 245 } 246 for (i = WPS_MAX_AUTHORIZED_MACS - 1; i > 0; i--) 247 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i - 1], 248 ETH_ALEN); 249 os_memcpy(reg->authorized_macs[0], addr, ETH_ALEN); 250 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs", 251 (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs)); 252 } 253 254 255 static void wps_registrar_remove_authorized_mac(struct wps_registrar *reg, 256 const u8 *addr) 257 { 258 int i; 259 wpa_printf(MSG_DEBUG, "WPS: Remove authorized MAC " MACSTR, 260 MAC2STR(addr)); 261 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) { 262 if (ether_addr_equal(reg->authorized_macs[i], addr)) 263 break; 264 } 265 if (i == WPS_MAX_AUTHORIZED_MACS) { 266 wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was not in the " 267 "list"); 268 return; /* not in the list */ 269 } 270 for (; i + 1 < WPS_MAX_AUTHORIZED_MACS; i++) 271 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i + 1], 272 ETH_ALEN); 273 os_memset(reg->authorized_macs[WPS_MAX_AUTHORIZED_MACS - 1], 0, 274 ETH_ALEN); 275 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs", 276 (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs)); 277 } 278 279 280 static void wps_free_devices(struct wps_registrar_device *dev) 281 { 282 struct wps_registrar_device *prev; 283 284 while (dev) { 285 prev = dev; 286 dev = dev->next; 287 wps_device_data_free(&prev->dev); 288 os_free(prev); 289 } 290 } 291 292 293 static struct wps_registrar_device * wps_device_get(struct wps_registrar *reg, 294 const u8 *addr) 295 { 296 struct wps_registrar_device *dev; 297 298 for (dev = reg->devices; dev; dev = dev->next) { 299 if (ether_addr_equal(dev->dev.mac_addr, addr)) 300 return dev; 301 } 302 return NULL; 303 } 304 305 306 static void wps_device_clone_data(struct wps_device_data *dst, 307 struct wps_device_data *src) 308 { 309 os_memcpy(dst->mac_addr, src->mac_addr, ETH_ALEN); 310 os_memcpy(dst->pri_dev_type, src->pri_dev_type, WPS_DEV_TYPE_LEN); 311 312 #define WPS_STRDUP(n) \ 313 os_free(dst->n); \ 314 dst->n = src->n ? os_strdup(src->n) : NULL 315 316 WPS_STRDUP(device_name); 317 WPS_STRDUP(manufacturer); 318 WPS_STRDUP(model_name); 319 WPS_STRDUP(model_number); 320 WPS_STRDUP(serial_number); 321 #undef WPS_STRDUP 322 } 323 324 325 int wps_device_store(struct wps_registrar *reg, 326 struct wps_device_data *dev, const u8 *uuid) 327 { 328 struct wps_registrar_device *d; 329 330 d = wps_device_get(reg, dev->mac_addr); 331 if (d == NULL) { 332 d = os_zalloc(sizeof(*d)); 333 if (d == NULL) 334 return -1; 335 d->next = reg->devices; 336 reg->devices = d; 337 } 338 339 wps_device_clone_data(&d->dev, dev); 340 os_memcpy(d->uuid, uuid, WPS_UUID_LEN); 341 342 return 0; 343 } 344 345 346 static void wps_registrar_add_pbc_session(struct wps_registrar *reg, 347 const u8 *addr, const u8 *uuid_e) 348 { 349 struct wps_pbc_session *pbc, *prev = NULL; 350 struct os_reltime now; 351 352 os_get_reltime(&now); 353 354 pbc = reg->pbc_sessions; 355 while (pbc) { 356 if (ether_addr_equal(pbc->addr, addr) && 357 os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0) { 358 if (prev) 359 prev->next = pbc->next; 360 else 361 reg->pbc_sessions = pbc->next; 362 break; 363 } 364 prev = pbc; 365 pbc = pbc->next; 366 } 367 368 if (!pbc) { 369 pbc = os_zalloc(sizeof(*pbc)); 370 if (pbc == NULL) 371 return; 372 os_memcpy(pbc->addr, addr, ETH_ALEN); 373 if (uuid_e) 374 os_memcpy(pbc->uuid_e, uuid_e, WPS_UUID_LEN); 375 } 376 377 pbc->next = reg->pbc_sessions; 378 reg->pbc_sessions = pbc; 379 pbc->timestamp = now; 380 381 /* remove entries that have timed out */ 382 prev = pbc; 383 pbc = pbc->next; 384 385 while (pbc) { 386 if (os_reltime_expired(&now, &pbc->timestamp, 387 WPS_PBC_WALK_TIME)) { 388 prev->next = NULL; 389 wps_free_pbc_sessions(pbc); 390 break; 391 } 392 prev = pbc; 393 pbc = pbc->next; 394 } 395 } 396 397 398 static void wps_registrar_remove_pbc_session(struct wps_registrar *reg, 399 const u8 *uuid_e, 400 const u8 *p2p_dev_addr) 401 { 402 struct wps_pbc_session *pbc, *prev = NULL, *tmp; 403 404 pbc = reg->pbc_sessions; 405 while (pbc) { 406 if (os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0 || 407 (p2p_dev_addr && !is_zero_ether_addr(reg->p2p_dev_addr) && 408 ether_addr_equal(reg->p2p_dev_addr, p2p_dev_addr))) { 409 if (prev) 410 prev->next = pbc->next; 411 else 412 reg->pbc_sessions = pbc->next; 413 tmp = pbc; 414 pbc = pbc->next; 415 wpa_printf(MSG_DEBUG, "WPS: Removing PBC session for " 416 "addr=" MACSTR, MAC2STR(tmp->addr)); 417 wpa_hexdump(MSG_DEBUG, "WPS: Removed UUID-E", 418 tmp->uuid_e, WPS_UUID_LEN); 419 os_free(tmp); 420 continue; 421 } 422 prev = pbc; 423 pbc = pbc->next; 424 } 425 } 426 427 428 int wps_registrar_pbc_overlap(struct wps_registrar *reg, 429 const u8 *addr, const u8 *uuid_e) 430 { 431 int count = 0; 432 struct wps_pbc_session *pbc; 433 struct wps_pbc_session *first = NULL; 434 struct os_reltime now; 435 436 os_get_reltime(&now); 437 438 wpa_printf(MSG_DEBUG, "WPS: Checking active PBC sessions for overlap"); 439 440 if (uuid_e) { 441 wpa_printf(MSG_DEBUG, "WPS: Add one for the requested UUID"); 442 wpa_hexdump(MSG_DEBUG, "WPS: Requested UUID", 443 uuid_e, WPS_UUID_LEN); 444 count++; 445 } 446 447 for (pbc = reg->pbc_sessions; pbc; pbc = pbc->next) { 448 wpa_printf(MSG_DEBUG, "WPS: Consider PBC session with " MACSTR, 449 MAC2STR(pbc->addr)); 450 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", 451 pbc->uuid_e, WPS_UUID_LEN); 452 if (os_reltime_expired(&now, &pbc->timestamp, 453 WPS_PBC_WALK_TIME)) { 454 wpa_printf(MSG_DEBUG, "WPS: PBC walk time has expired"); 455 break; 456 } 457 if (first && 458 os_memcmp(pbc->uuid_e, first->uuid_e, WPS_UUID_LEN) == 0) { 459 wpa_printf(MSG_DEBUG, "WPS: Same Enrollee"); 460 continue; /* same Enrollee */ 461 } 462 if (uuid_e == NULL || 463 os_memcmp(uuid_e, pbc->uuid_e, WPS_UUID_LEN)) { 464 wpa_printf(MSG_DEBUG, "WPS: New Enrollee"); 465 count++; 466 } 467 if (first == NULL) 468 first = pbc; 469 } 470 471 wpa_printf(MSG_DEBUG, "WPS: %u active PBC session(s) found", count); 472 473 return count > 1 ? 1 : 0; 474 } 475 476 477 static int wps_build_wps_state(struct wps_context *wps, struct wpabuf *msg) 478 { 479 wpa_printf(MSG_DEBUG, "WPS: * Wi-Fi Protected Setup State (%d)", 480 wps->wps_state); 481 wpabuf_put_be16(msg, ATTR_WPS_STATE); 482 wpabuf_put_be16(msg, 1); 483 wpabuf_put_u8(msg, wps->wps_state); 484 return 0; 485 } 486 487 488 #ifdef CONFIG_WPS_UPNP 489 static void wps_registrar_free_pending_m2(struct wps_context *wps) 490 { 491 struct upnp_pending_message *p, *p2, *prev = NULL; 492 p = wps->upnp_msgs; 493 while (p) { 494 if (p->type == WPS_M2 || p->type == WPS_M2D) { 495 if (prev == NULL) 496 wps->upnp_msgs = p->next; 497 else 498 prev->next = p->next; 499 wpa_printf(MSG_DEBUG, "WPS UPnP: Drop pending M2/M2D"); 500 p2 = p; 501 p = p->next; 502 wpabuf_free(p2->msg); 503 os_free(p2); 504 continue; 505 } 506 prev = p; 507 p = p->next; 508 } 509 } 510 #endif /* CONFIG_WPS_UPNP */ 511 512 513 static int wps_build_ap_setup_locked(struct wps_context *wps, 514 struct wpabuf *msg) 515 { 516 if (wps->ap_setup_locked && wps->ap_setup_locked != 2) { 517 wpa_printf(MSG_DEBUG, "WPS: * AP Setup Locked"); 518 wpabuf_put_be16(msg, ATTR_AP_SETUP_LOCKED); 519 wpabuf_put_be16(msg, 1); 520 wpabuf_put_u8(msg, 1); 521 } 522 return 0; 523 } 524 525 526 static int wps_build_selected_registrar(struct wps_registrar *reg, 527 struct wpabuf *msg) 528 { 529 if (!reg->sel_reg_union) 530 return 0; 531 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar"); 532 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR); 533 wpabuf_put_be16(msg, 1); 534 wpabuf_put_u8(msg, 1); 535 return 0; 536 } 537 538 539 static int wps_build_sel_reg_dev_password_id(struct wps_registrar *reg, 540 struct wpabuf *msg) 541 { 542 u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT; 543 if (!reg->sel_reg_union) 544 return 0; 545 if (reg->sel_reg_dev_password_id_override >= 0) 546 id = reg->sel_reg_dev_password_id_override; 547 wpa_printf(MSG_DEBUG, "WPS: * Device Password ID (%d)", id); 548 wpabuf_put_be16(msg, ATTR_DEV_PASSWORD_ID); 549 wpabuf_put_be16(msg, 2); 550 wpabuf_put_be16(msg, id); 551 return 0; 552 } 553 554 555 static int wps_build_sel_pbc_reg_uuid_e(struct wps_registrar *reg, 556 struct wpabuf *msg) 557 { 558 u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT; 559 if (!reg->sel_reg_union) 560 return 0; 561 if (reg->sel_reg_dev_password_id_override >= 0) 562 id = reg->sel_reg_dev_password_id_override; 563 if (id != DEV_PW_PUSHBUTTON || !reg->dualband) 564 return 0; 565 return wps_build_uuid_e(msg, reg->wps->uuid); 566 } 567 568 569 static void wps_set_pushbutton(u16 *methods, u16 conf_methods) 570 { 571 *methods |= WPS_CONFIG_PUSHBUTTON; 572 if ((conf_methods & WPS_CONFIG_VIRT_PUSHBUTTON) == 573 WPS_CONFIG_VIRT_PUSHBUTTON) 574 *methods |= WPS_CONFIG_VIRT_PUSHBUTTON; 575 if ((conf_methods & WPS_CONFIG_PHY_PUSHBUTTON) == 576 WPS_CONFIG_PHY_PUSHBUTTON) 577 *methods |= WPS_CONFIG_PHY_PUSHBUTTON; 578 if ((*methods & WPS_CONFIG_VIRT_PUSHBUTTON) != 579 WPS_CONFIG_VIRT_PUSHBUTTON && 580 (*methods & WPS_CONFIG_PHY_PUSHBUTTON) != 581 WPS_CONFIG_PHY_PUSHBUTTON) { 582 /* 583 * Required to include virtual/physical flag, but we were not 584 * configured with push button type, so have to default to one 585 * of them. 586 */ 587 *methods |= WPS_CONFIG_PHY_PUSHBUTTON; 588 } 589 } 590 591 592 static int wps_build_sel_reg_config_methods(struct wps_registrar *reg, 593 struct wpabuf *msg) 594 { 595 u16 methods; 596 if (!reg->sel_reg_union) 597 return 0; 598 methods = reg->wps->config_methods; 599 methods &= ~WPS_CONFIG_PUSHBUTTON; 600 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 601 WPS_CONFIG_PHY_PUSHBUTTON); 602 if (reg->pbc) 603 wps_set_pushbutton(&methods, reg->wps->config_methods); 604 if (reg->sel_reg_config_methods_override >= 0) 605 methods = reg->sel_reg_config_methods_override; 606 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar Config Methods (%x)", 607 methods); 608 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR_CONFIG_METHODS); 609 wpabuf_put_be16(msg, 2); 610 wpabuf_put_be16(msg, methods); 611 return 0; 612 } 613 614 615 static int wps_build_probe_config_methods(struct wps_registrar *reg, 616 struct wpabuf *msg) 617 { 618 u16 methods; 619 /* 620 * These are the methods that the AP supports as an Enrollee for adding 621 * external Registrars. 622 */ 623 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 624 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 625 WPS_CONFIG_PHY_PUSHBUTTON); 626 wpa_printf(MSG_DEBUG, "WPS: * Config Methods (%x)", methods); 627 wpabuf_put_be16(msg, ATTR_CONFIG_METHODS); 628 wpabuf_put_be16(msg, 2); 629 wpabuf_put_be16(msg, methods); 630 return 0; 631 } 632 633 634 static int wps_build_config_methods_r(struct wps_registrar *reg, 635 struct wpabuf *msg) 636 { 637 return wps_build_config_methods(msg, reg->wps->config_methods); 638 } 639 640 641 const u8 * wps_authorized_macs(struct wps_registrar *reg, size_t *count) 642 { 643 *count = 0; 644 645 while (*count < WPS_MAX_AUTHORIZED_MACS) { 646 if (is_zero_ether_addr(reg->authorized_macs_union[*count])) 647 break; 648 (*count)++; 649 } 650 651 return (const u8 *) reg->authorized_macs_union; 652 } 653 654 655 /** 656 * wps_registrar_init - Initialize WPS Registrar data 657 * @wps: Pointer to longterm WPS context 658 * @cfg: Registrar configuration 659 * Returns: Pointer to allocated Registrar data or %NULL on failure 660 * 661 * This function is used to initialize WPS Registrar functionality. It can be 662 * used for a single Registrar run (e.g., when run in a supplicant) or multiple 663 * runs (e.g., when run as an internal Registrar in an AP). Caller is 664 * responsible for freeing the returned data with wps_registrar_deinit() when 665 * Registrar functionality is not needed anymore. 666 */ 667 struct wps_registrar * 668 wps_registrar_init(struct wps_context *wps, 669 const struct wps_registrar_config *cfg) 670 { 671 struct wps_registrar *reg = os_zalloc(sizeof(*reg)); 672 if (reg == NULL) 673 return NULL; 674 675 dl_list_init(®->pins); 676 dl_list_init(®->nfc_pw_tokens); 677 reg->wps = wps; 678 reg->new_psk_cb = cfg->new_psk_cb; 679 reg->set_ie_cb = cfg->set_ie_cb; 680 reg->pin_needed_cb = cfg->pin_needed_cb; 681 reg->reg_success_cb = cfg->reg_success_cb; 682 reg->set_sel_reg_cb = cfg->set_sel_reg_cb; 683 reg->enrollee_seen_cb = cfg->enrollee_seen_cb; 684 reg->lookup_pskfile_cb = cfg->lookup_pskfile_cb; 685 reg->cb_ctx = cfg->cb_ctx; 686 reg->skip_cred_build = cfg->skip_cred_build; 687 if (cfg->extra_cred) { 688 reg->extra_cred = wpabuf_alloc_copy(cfg->extra_cred, 689 cfg->extra_cred_len); 690 if (reg->extra_cred == NULL) { 691 os_free(reg); 692 return NULL; 693 } 694 } 695 reg->disable_auto_conf = cfg->disable_auto_conf; 696 reg->sel_reg_dev_password_id_override = -1; 697 reg->sel_reg_config_methods_override = -1; 698 reg->dualband = cfg->dualband; 699 reg->force_per_enrollee_psk = cfg->force_per_enrollee_psk; 700 701 if (cfg->multi_ap_backhaul_ssid) { 702 os_memcpy(reg->multi_ap_backhaul_ssid, 703 cfg->multi_ap_backhaul_ssid, 704 cfg->multi_ap_backhaul_ssid_len); 705 reg->multi_ap_backhaul_ssid_len = 706 cfg->multi_ap_backhaul_ssid_len; 707 } 708 if (cfg->multi_ap_backhaul_network_key) { 709 reg->multi_ap_backhaul_network_key = 710 os_memdup(cfg->multi_ap_backhaul_network_key, 711 cfg->multi_ap_backhaul_network_key_len); 712 if (reg->multi_ap_backhaul_network_key) 713 reg->multi_ap_backhaul_network_key_len = 714 cfg->multi_ap_backhaul_network_key_len; 715 } 716 717 if (wps_set_ie(reg)) { 718 wps_registrar_deinit(reg); 719 return NULL; 720 } 721 722 return reg; 723 } 724 725 726 void wps_registrar_flush(struct wps_registrar *reg) 727 { 728 if (reg == NULL) 729 return; 730 wps_free_pins(®->pins); 731 wps_free_nfc_pw_tokens(®->nfc_pw_tokens, 0); 732 wps_free_pbc_sessions(reg->pbc_sessions); 733 reg->pbc_sessions = NULL; 734 wps_free_devices(reg->devices); 735 reg->devices = NULL; 736 #ifdef WPS_WORKAROUNDS 737 reg->pbc_ignore_start.sec = 0; 738 #endif /* WPS_WORKAROUNDS */ 739 } 740 741 742 /** 743 * wps_registrar_deinit - Deinitialize WPS Registrar data 744 * @reg: Registrar data from wps_registrar_init() 745 */ 746 void wps_registrar_deinit(struct wps_registrar *reg) 747 { 748 if (reg == NULL) 749 return; 750 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 751 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 752 wps_registrar_flush(reg); 753 wpabuf_clear_free(reg->extra_cred); 754 bin_clear_free(reg->multi_ap_backhaul_network_key, 755 reg->multi_ap_backhaul_network_key_len); 756 os_free(reg); 757 } 758 759 760 static void wps_registrar_invalidate_unused(struct wps_registrar *reg) 761 { 762 struct wps_uuid_pin *pin; 763 764 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 765 if (pin->wildcard_uuid == 1 && !(pin->flags & PIN_LOCKED)) { 766 wpa_printf(MSG_DEBUG, "WPS: Invalidate previously " 767 "configured wildcard PIN"); 768 wps_registrar_remove_pin(reg, pin); 769 break; 770 } 771 } 772 } 773 774 775 /** 776 * wps_registrar_add_pin - Configure a new PIN for Registrar 777 * @reg: Registrar data from wps_registrar_init() 778 * @addr: Enrollee MAC address or %NULL if not known 779 * @uuid: UUID-E or %NULL for wildcard (any UUID) 780 * @pin: PIN (Device Password) 781 * @pin_len: Length of pin in octets 782 * @timeout: Time (in seconds) when the PIN will be invalidated; 0 = no timeout 783 * Returns: 0 on success, -1 on failure 784 */ 785 int wps_registrar_add_pin(struct wps_registrar *reg, const u8 *addr, 786 const u8 *uuid, const u8 *pin, size_t pin_len, 787 int timeout) 788 { 789 struct wps_uuid_pin *p; 790 791 p = os_zalloc(sizeof(*p)); 792 if (p == NULL) 793 return -1; 794 if (addr) 795 os_memcpy(p->enrollee_addr, addr, ETH_ALEN); 796 if (uuid == NULL) 797 p->wildcard_uuid = 1; 798 else 799 os_memcpy(p->uuid, uuid, WPS_UUID_LEN); 800 p->pin = os_memdup(pin, pin_len); 801 if (p->pin == NULL) { 802 os_free(p); 803 return -1; 804 } 805 p->pin_len = pin_len; 806 807 if (timeout) { 808 p->flags |= PIN_EXPIRES; 809 os_get_reltime(&p->expiration); 810 p->expiration.sec += timeout; 811 } 812 813 if (p->wildcard_uuid) 814 wps_registrar_invalidate_unused(reg); 815 816 dl_list_add(®->pins, &p->list); 817 818 wpa_printf(MSG_DEBUG, "WPS: A new PIN configured (timeout=%d)", 819 timeout); 820 wpa_hexdump(MSG_DEBUG, "WPS: UUID", uuid, WPS_UUID_LEN); 821 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: PIN", pin, pin_len); 822 reg->selected_registrar = 1; 823 reg->pbc = 0; 824 if (addr) 825 wps_registrar_add_authorized_mac(reg, addr); 826 else 827 wps_registrar_add_authorized_mac( 828 reg, (u8 *) "\xff\xff\xff\xff\xff\xff"); 829 wps_registrar_selected_registrar_changed(reg, 0); 830 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 831 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, 832 wps_registrar_set_selected_timeout, 833 reg, NULL); 834 835 return 0; 836 } 837 838 839 static void wps_registrar_remove_pin(struct wps_registrar *reg, 840 struct wps_uuid_pin *pin) 841 { 842 u8 *addr; 843 u8 bcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 844 845 if (is_zero_ether_addr(pin->enrollee_addr)) 846 addr = bcast; 847 else 848 addr = pin->enrollee_addr; 849 wps_registrar_remove_authorized_mac(reg, addr); 850 wps_remove_pin(pin); 851 wps_registrar_selected_registrar_changed(reg, 0); 852 } 853 854 855 static void wps_registrar_expire_pins(struct wps_registrar *reg) 856 { 857 struct wps_uuid_pin *pin, *prev; 858 struct os_reltime now; 859 860 os_get_reltime(&now); 861 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 862 { 863 if ((pin->flags & PIN_EXPIRES) && 864 os_reltime_before(&pin->expiration, &now)) { 865 wpa_hexdump(MSG_DEBUG, "WPS: Expired PIN for UUID", 866 pin->uuid, WPS_UUID_LEN); 867 wps_registrar_remove_pin(reg, pin); 868 } 869 } 870 } 871 872 873 /** 874 * wps_registrar_invalidate_wildcard_pin - Invalidate a wildcard PIN 875 * @reg: Registrar data from wps_registrar_init() 876 * @dev_pw: PIN to search for or %NULL to match any 877 * @dev_pw_len: Length of dev_pw in octets 878 * Returns: 0 on success, -1 if not wildcard PIN is enabled 879 */ 880 static int wps_registrar_invalidate_wildcard_pin(struct wps_registrar *reg, 881 const u8 *dev_pw, 882 size_t dev_pw_len) 883 { 884 struct wps_uuid_pin *pin, *prev; 885 886 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 887 { 888 if (dev_pw && pin->pin && 889 (dev_pw_len != pin->pin_len || 890 os_memcmp_const(dev_pw, pin->pin, dev_pw_len) != 0)) 891 continue; /* different PIN */ 892 if (pin->wildcard_uuid) { 893 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID", 894 pin->uuid, WPS_UUID_LEN); 895 wps_registrar_remove_pin(reg, pin); 896 return 0; 897 } 898 } 899 900 return -1; 901 } 902 903 904 /** 905 * wps_registrar_invalidate_pin - Invalidate a PIN for a specific UUID-E 906 * @reg: Registrar data from wps_registrar_init() 907 * @uuid: UUID-E 908 * Returns: 0 on success, -1 on failure (e.g., PIN not found) 909 */ 910 int wps_registrar_invalidate_pin(struct wps_registrar *reg, const u8 *uuid) 911 { 912 struct wps_uuid_pin *pin, *prev; 913 914 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 915 { 916 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 917 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID", 918 pin->uuid, WPS_UUID_LEN); 919 wps_registrar_remove_pin(reg, pin); 920 return 0; 921 } 922 } 923 924 return -1; 925 } 926 927 928 static const u8 * wps_registrar_get_pin(struct wps_registrar *reg, 929 const u8 *uuid, size_t *pin_len) 930 { 931 struct wps_uuid_pin *pin, *found = NULL; 932 int wildcard = 0; 933 934 wps_registrar_expire_pins(reg); 935 936 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 937 if (!pin->wildcard_uuid && 938 os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 939 found = pin; 940 break; 941 } 942 } 943 944 if (!found) { 945 /* Check for wildcard UUIDs since none of the UUID-specific 946 * PINs matched */ 947 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 948 if (pin->wildcard_uuid == 1 || 949 pin->wildcard_uuid == 2) { 950 wpa_printf(MSG_DEBUG, "WPS: Found a wildcard " 951 "PIN. Assigned it for this UUID-E"); 952 wildcard = 1; 953 os_memcpy(pin->uuid, uuid, WPS_UUID_LEN); 954 found = pin; 955 break; 956 } 957 } 958 } 959 960 if (!found) 961 return NULL; 962 963 /* 964 * Lock the PIN to avoid attacks based on concurrent re-use of the PIN 965 * that could otherwise avoid PIN invalidations. 966 */ 967 if (found->flags & PIN_LOCKED) { 968 wpa_printf(MSG_DEBUG, "WPS: Selected PIN locked - do not " 969 "allow concurrent re-use"); 970 return NULL; 971 } 972 *pin_len = found->pin_len; 973 found->flags |= PIN_LOCKED; 974 if (wildcard) 975 found->wildcard_uuid++; 976 return found->pin; 977 } 978 979 980 /** 981 * wps_registrar_unlock_pin - Unlock a PIN for a specific UUID-E 982 * @reg: Registrar data from wps_registrar_init() 983 * @uuid: UUID-E 984 * Returns: 0 on success, -1 on failure 985 * 986 * PINs are locked to enforce only one concurrent use. This function unlocks a 987 * PIN to allow it to be used again. If the specified PIN was configured using 988 * a wildcard UUID, it will be removed instead of allowing multiple uses. 989 */ 990 int wps_registrar_unlock_pin(struct wps_registrar *reg, const u8 *uuid) 991 { 992 struct wps_uuid_pin *pin; 993 994 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 995 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 996 if (pin->wildcard_uuid == 3) { 997 wpa_printf(MSG_DEBUG, "WPS: Invalidating used " 998 "wildcard PIN"); 999 return wps_registrar_invalidate_pin(reg, uuid); 1000 } 1001 pin->flags &= ~PIN_LOCKED; 1002 return 0; 1003 } 1004 } 1005 1006 return -1; 1007 } 1008 1009 1010 static void wps_registrar_stop_pbc(struct wps_registrar *reg) 1011 { 1012 reg->selected_registrar = 0; 1013 reg->pbc = 0; 1014 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN); 1015 wps_registrar_remove_authorized_mac(reg, 1016 (u8 *) "\xff\xff\xff\xff\xff\xff"); 1017 wps_registrar_selected_registrar_changed(reg, 0); 1018 } 1019 1020 1021 static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx) 1022 { 1023 struct wps_registrar *reg = eloop_ctx; 1024 1025 wpa_printf(MSG_DEBUG, "WPS: PBC timed out - disable PBC mode"); 1026 wps_pbc_timeout_event(reg->wps); 1027 wps_registrar_stop_pbc(reg); 1028 } 1029 1030 1031 /** 1032 * wps_registrar_button_pushed - Notify Registrar that AP button was pushed 1033 * @reg: Registrar data from wps_registrar_init() 1034 * @p2p_dev_addr: Limit allowed PBC devices to the specified P2P device, %NULL 1035 * indicates no such filtering 1036 * Returns: 0 on success, -1 on failure, -2 on session overlap 1037 * 1038 * This function is called on an AP when a push button is pushed to activate 1039 * PBC mode. The PBC mode will be stopped after walk time (2 minutes) timeout 1040 * or when a PBC registration is completed. If more than one Enrollee in active 1041 * PBC mode has been detected during the monitor time (previous 2 minutes), the 1042 * PBC mode is not activated and -2 is returned to indicate session overlap. 1043 * This is skipped if a specific Enrollee is selected. 1044 */ 1045 int wps_registrar_button_pushed(struct wps_registrar *reg, 1046 const u8 *p2p_dev_addr) 1047 { 1048 if (p2p_dev_addr == NULL && 1049 wps_registrar_pbc_overlap(reg, NULL, NULL)) { 1050 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - do not start PBC " 1051 "mode"); 1052 wps_pbc_overlap_event(reg->wps); 1053 return -2; 1054 } 1055 wpa_printf(MSG_DEBUG, "WPS: Button pushed - PBC mode started"); 1056 reg->force_pbc_overlap = 0; 1057 reg->selected_registrar = 1; 1058 reg->pbc = 1; 1059 if (p2p_dev_addr) 1060 os_memcpy(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN); 1061 else 1062 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN); 1063 wps_registrar_add_authorized_mac(reg, 1064 (u8 *) "\xff\xff\xff\xff\xff\xff"); 1065 wps_registrar_selected_registrar_changed(reg, 0); 1066 1067 wps_pbc_active_event(reg->wps); 1068 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 1069 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 1070 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wps_registrar_pbc_timeout, 1071 reg, NULL); 1072 return 0; 1073 } 1074 1075 1076 static void wps_registrar_pbc_completed(struct wps_registrar *reg) 1077 { 1078 wpa_printf(MSG_DEBUG, "WPS: PBC completed - stopping PBC mode"); 1079 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 1080 wps_registrar_stop_pbc(reg); 1081 wps_pbc_disable_event(reg->wps); 1082 } 1083 1084 1085 static void wps_registrar_pin_completed(struct wps_registrar *reg) 1086 { 1087 wpa_printf(MSG_DEBUG, "WPS: PIN completed using internal Registrar"); 1088 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 1089 reg->selected_registrar = 0; 1090 wps_registrar_selected_registrar_changed(reg, 0); 1091 } 1092 1093 1094 void wps_registrar_complete(struct wps_registrar *registrar, const u8 *uuid_e, 1095 const u8 *dev_pw, size_t dev_pw_len) 1096 { 1097 if (registrar->pbc) { 1098 wps_registrar_remove_pbc_session(registrar, 1099 uuid_e, NULL); 1100 wps_registrar_pbc_completed(registrar); 1101 #ifdef WPS_WORKAROUNDS 1102 os_get_reltime(®istrar->pbc_ignore_start); 1103 #endif /* WPS_WORKAROUNDS */ 1104 os_memcpy(registrar->pbc_ignore_uuid, uuid_e, WPS_UUID_LEN); 1105 } else { 1106 wps_registrar_pin_completed(registrar); 1107 } 1108 1109 if (dev_pw && 1110 wps_registrar_invalidate_wildcard_pin(registrar, dev_pw, 1111 dev_pw_len) == 0) { 1112 wpa_hexdump_key(MSG_DEBUG, "WPS: Invalidated wildcard PIN", 1113 dev_pw, dev_pw_len); 1114 } 1115 } 1116 1117 1118 int wps_registrar_wps_cancel(struct wps_registrar *reg) 1119 { 1120 if (reg->pbc) { 1121 wpa_printf(MSG_DEBUG, "WPS: PBC is set - cancelling it"); 1122 wps_registrar_pbc_timeout(reg, NULL); 1123 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 1124 return 1; 1125 } else if (reg->selected_registrar) { 1126 /* PIN Method */ 1127 wpa_printf(MSG_DEBUG, "WPS: PIN is set - cancelling it"); 1128 wps_registrar_pin_completed(reg); 1129 wps_registrar_invalidate_wildcard_pin(reg, NULL, 0); 1130 return 1; 1131 } 1132 return 0; 1133 } 1134 1135 1136 /** 1137 * wps_registrar_probe_req_rx - Notify Registrar of Probe Request 1138 * @reg: Registrar data from wps_registrar_init() 1139 * @addr: MAC address of the Probe Request sender 1140 * @wps_data: WPS IE contents 1141 * 1142 * This function is called on an AP when a Probe Request with WPS IE is 1143 * received. This is used to track PBC mode use and to detect possible overlap 1144 * situation with other WPS APs. 1145 */ 1146 void wps_registrar_probe_req_rx(struct wps_registrar *reg, const u8 *addr, 1147 const struct wpabuf *wps_data, 1148 int p2p_wildcard) 1149 { 1150 struct wps_parse_attr attr; 1151 int skip_add = 0; 1152 1153 wpa_hexdump_buf(MSG_MSGDUMP, 1154 "WPS: Probe Request with WPS data received", 1155 wps_data); 1156 1157 if (wps_parse_msg(wps_data, &attr) < 0) 1158 return; 1159 1160 if (attr.config_methods == NULL) { 1161 wpa_printf(MSG_DEBUG, "WPS: No Config Methods attribute in " 1162 "Probe Request"); 1163 return; 1164 } 1165 1166 if (attr.dev_password_id == NULL) { 1167 wpa_printf(MSG_DEBUG, "WPS: No Device Password Id attribute " 1168 "in Probe Request"); 1169 return; 1170 } 1171 1172 if (reg->enrollee_seen_cb && attr.uuid_e && 1173 attr.primary_dev_type && attr.request_type && !p2p_wildcard) { 1174 char *dev_name = NULL; 1175 if (attr.dev_name) { 1176 dev_name = os_zalloc(attr.dev_name_len + 1); 1177 if (dev_name) { 1178 os_memcpy(dev_name, attr.dev_name, 1179 attr.dev_name_len); 1180 } 1181 } 1182 reg->enrollee_seen_cb(reg->cb_ctx, addr, attr.uuid_e, 1183 attr.primary_dev_type, 1184 WPA_GET_BE16(attr.config_methods), 1185 WPA_GET_BE16(attr.dev_password_id), 1186 *attr.request_type, dev_name); 1187 os_free(dev_name); 1188 } 1189 1190 if (WPA_GET_BE16(attr.dev_password_id) != DEV_PW_PUSHBUTTON) 1191 return; /* Not PBC */ 1192 1193 wpa_printf(MSG_DEBUG, "WPS: Probe Request for PBC received from " 1194 MACSTR, MAC2STR(addr)); 1195 if (attr.uuid_e == NULL) { 1196 wpa_printf(MSG_DEBUG, "WPS: Invalid Probe Request WPS IE: No " 1197 "UUID-E included"); 1198 return; 1199 } 1200 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E from Probe Request", attr.uuid_e, 1201 WPS_UUID_LEN); 1202 1203 #ifdef WPS_WORKAROUNDS 1204 if (reg->pbc_ignore_start.sec && 1205 os_memcmp(attr.uuid_e, reg->pbc_ignore_uuid, WPS_UUID_LEN) == 0) { 1206 struct os_reltime now, dur; 1207 os_get_reltime(&now); 1208 os_reltime_sub(&now, ®->pbc_ignore_start, &dur); 1209 if (dur.sec >= 0 && dur.sec < 5) { 1210 wpa_printf(MSG_DEBUG, "WPS: Ignore PBC activation " 1211 "based on Probe Request from the Enrollee " 1212 "that just completed PBC provisioning"); 1213 skip_add = 1; 1214 } else 1215 reg->pbc_ignore_start.sec = 0; 1216 } 1217 #endif /* WPS_WORKAROUNDS */ 1218 1219 if (!skip_add) 1220 wps_registrar_add_pbc_session(reg, addr, attr.uuid_e); 1221 if (wps_registrar_pbc_overlap(reg, addr, attr.uuid_e)) { 1222 wpa_printf(MSG_DEBUG, "WPS: PBC session overlap detected"); 1223 reg->force_pbc_overlap = 1; 1224 wps_pbc_overlap_event(reg->wps); 1225 } 1226 } 1227 1228 1229 int wps_cb_new_psk(struct wps_registrar *reg, const u8 *mac_addr, 1230 const u8 *p2p_dev_addr, const u8 *psk, size_t psk_len) 1231 { 1232 if (reg->new_psk_cb == NULL) 1233 return 0; 1234 1235 return reg->new_psk_cb(reg->cb_ctx, mac_addr, p2p_dev_addr, psk, 1236 psk_len); 1237 } 1238 1239 1240 static void wps_cb_pin_needed(struct wps_registrar *reg, const u8 *uuid_e, 1241 const struct wps_device_data *dev) 1242 { 1243 if (reg->pin_needed_cb == NULL) 1244 return; 1245 1246 reg->pin_needed_cb(reg->cb_ctx, uuid_e, dev); 1247 } 1248 1249 1250 static void wps_cb_reg_success(struct wps_registrar *reg, const u8 *mac_addr, 1251 const u8 *uuid_e, const u8 *dev_pw, 1252 size_t dev_pw_len) 1253 { 1254 if (reg->reg_success_cb == NULL) 1255 return; 1256 1257 reg->reg_success_cb(reg->cb_ctx, mac_addr, uuid_e, dev_pw, dev_pw_len); 1258 } 1259 1260 1261 static int wps_cb_set_ie(struct wps_registrar *reg, struct wpabuf *beacon_ie, 1262 struct wpabuf *probe_resp_ie) 1263 { 1264 return reg->set_ie_cb(reg->cb_ctx, beacon_ie, probe_resp_ie); 1265 } 1266 1267 1268 static void wps_cb_set_sel_reg(struct wps_registrar *reg) 1269 { 1270 u16 methods = 0; 1271 if (reg->set_sel_reg_cb == NULL) 1272 return; 1273 1274 if (reg->selected_registrar) { 1275 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 1276 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 1277 WPS_CONFIG_PHY_PUSHBUTTON); 1278 if (reg->pbc) 1279 wps_set_pushbutton(&methods, reg->wps->config_methods); 1280 } 1281 1282 wpa_printf(MSG_DEBUG, "WPS: wps_cb_set_sel_reg: sel_reg=%d " 1283 "config_methods=0x%x pbc=%d methods=0x%x", 1284 reg->selected_registrar, reg->wps->config_methods, 1285 reg->pbc, methods); 1286 1287 reg->set_sel_reg_cb(reg->cb_ctx, reg->selected_registrar, 1288 reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT, 1289 methods); 1290 } 1291 1292 1293 static int wps_cp_lookup_pskfile(struct wps_registrar *reg, const u8 *mac_addr, 1294 const u8 **psk) 1295 { 1296 if (!reg->lookup_pskfile_cb) 1297 return 0; 1298 return reg->lookup_pskfile_cb(reg->cb_ctx, mac_addr, psk); 1299 } 1300 1301 1302 static int wps_set_ie(struct wps_registrar *reg) 1303 { 1304 struct wpabuf *beacon; 1305 struct wpabuf *probe; 1306 const u8 *auth_macs; 1307 size_t count; 1308 size_t vendor_len = 0; 1309 int i; 1310 1311 if (reg->set_ie_cb == NULL) 1312 return 0; 1313 1314 for (i = 0; i < MAX_WPS_VENDOR_EXTENSIONS; i++) { 1315 if (reg->wps->dev.vendor_ext[i]) { 1316 vendor_len += 2 + 2; 1317 vendor_len += wpabuf_len(reg->wps->dev.vendor_ext[i]); 1318 } 1319 } 1320 1321 beacon = wpabuf_alloc(400 + vendor_len); 1322 probe = wpabuf_alloc(500 + vendor_len); 1323 if (!beacon || !probe) 1324 goto fail; 1325 1326 auth_macs = wps_authorized_macs(reg, &count); 1327 1328 wpa_printf(MSG_DEBUG, "WPS: Build Beacon IEs"); 1329 1330 if (wps_build_version(beacon) || 1331 wps_build_wps_state(reg->wps, beacon) || 1332 wps_build_ap_setup_locked(reg->wps, beacon) || 1333 wps_build_selected_registrar(reg, beacon) || 1334 wps_build_sel_reg_dev_password_id(reg, beacon) || 1335 wps_build_sel_reg_config_methods(reg, beacon) || 1336 wps_build_sel_pbc_reg_uuid_e(reg, beacon) || 1337 (reg->dualband && wps_build_rf_bands(®->wps->dev, beacon, 0)) || 1338 wps_build_wfa_ext(beacon, 0, auth_macs, count, 0) || 1339 wps_build_vendor_ext(®->wps->dev, beacon) || 1340 wps_build_application_ext(®->wps->dev, beacon)) 1341 goto fail; 1342 1343 #ifdef CONFIG_P2P 1344 if (wps_build_dev_name(®->wps->dev, beacon) || 1345 wps_build_primary_dev_type(®->wps->dev, beacon)) 1346 goto fail; 1347 #endif /* CONFIG_P2P */ 1348 1349 wpa_printf(MSG_DEBUG, "WPS: Build Probe Response IEs"); 1350 1351 if (wps_build_version(probe) || 1352 wps_build_wps_state(reg->wps, probe) || 1353 wps_build_ap_setup_locked(reg->wps, probe) || 1354 wps_build_selected_registrar(reg, probe) || 1355 wps_build_sel_reg_dev_password_id(reg, probe) || 1356 wps_build_sel_reg_config_methods(reg, probe) || 1357 wps_build_resp_type(probe, reg->wps->ap ? WPS_RESP_AP : 1358 WPS_RESP_REGISTRAR) || 1359 wps_build_uuid_e(probe, reg->wps->uuid) || 1360 wps_build_device_attrs(®->wps->dev, probe) || 1361 wps_build_probe_config_methods(reg, probe) || 1362 (reg->dualband && wps_build_rf_bands(®->wps->dev, probe, 0)) || 1363 wps_build_wfa_ext(probe, 0, auth_macs, count, 0) || 1364 wps_build_vendor_ext(®->wps->dev, probe) || 1365 wps_build_application_ext(®->wps->dev, probe)) 1366 goto fail; 1367 1368 beacon = wps_ie_encapsulate(beacon); 1369 probe = wps_ie_encapsulate(probe); 1370 1371 if (!beacon || !probe) 1372 goto fail; 1373 1374 return wps_cb_set_ie(reg, beacon, probe); 1375 fail: 1376 wpabuf_free(beacon); 1377 wpabuf_free(probe); 1378 return -1; 1379 } 1380 1381 1382 static int wps_get_dev_password(struct wps_data *wps) 1383 { 1384 const u8 *pin; 1385 size_t pin_len = 0; 1386 1387 bin_clear_free(wps->dev_password, wps->dev_password_len); 1388 wps->dev_password = NULL; 1389 1390 if (wps->pbc) { 1391 wpa_printf(MSG_DEBUG, "WPS: Use default PIN for PBC"); 1392 pin = (const u8 *) "00000000"; 1393 pin_len = 8; 1394 #ifdef CONFIG_WPS_NFC 1395 } else if (wps->nfc_pw_token) { 1396 if (wps->nfc_pw_token->pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) 1397 { 1398 wpa_printf(MSG_DEBUG, "WPS: Using NFC connection " 1399 "handover and abbreviated WPS handshake " 1400 "without Device Password"); 1401 return 0; 1402 } 1403 wpa_printf(MSG_DEBUG, "WPS: Use OOB Device Password from NFC " 1404 "Password Token"); 1405 pin = wps->nfc_pw_token->dev_pw; 1406 pin_len = wps->nfc_pw_token->dev_pw_len; 1407 } else if (wps->dev_pw_id >= 0x10 && 1408 wps->wps->ap_nfc_dev_pw_id == wps->dev_pw_id && 1409 wps->wps->ap_nfc_dev_pw) { 1410 wpa_printf(MSG_DEBUG, "WPS: Use OOB Device Password from own NFC Password Token"); 1411 pin = wpabuf_head(wps->wps->ap_nfc_dev_pw); 1412 pin_len = wpabuf_len(wps->wps->ap_nfc_dev_pw); 1413 #endif /* CONFIG_WPS_NFC */ 1414 } else { 1415 pin = wps_registrar_get_pin(wps->wps->registrar, wps->uuid_e, 1416 &pin_len); 1417 if (pin && wps->dev_pw_id >= 0x10) { 1418 wpa_printf(MSG_DEBUG, "WPS: No match for OOB Device " 1419 "Password ID, but PIN found"); 1420 /* 1421 * See whether Enrollee is willing to use PIN instead. 1422 */ 1423 wps->dev_pw_id = DEV_PW_DEFAULT; 1424 } 1425 } 1426 if (pin == NULL) { 1427 wpa_printf(MSG_DEBUG, "WPS: No Device Password available for " 1428 "the Enrollee (context %p registrar %p)", 1429 wps->wps, wps->wps->registrar); 1430 wps_cb_pin_needed(wps->wps->registrar, wps->uuid_e, 1431 &wps->peer_dev); 1432 return -1; 1433 } 1434 1435 wps->dev_password = os_memdup(pin, pin_len); 1436 if (wps->dev_password == NULL) 1437 return -1; 1438 wps->dev_password_len = pin_len; 1439 1440 return 0; 1441 } 1442 1443 1444 static int wps_build_uuid_r(struct wps_data *wps, struct wpabuf *msg) 1445 { 1446 wpa_printf(MSG_DEBUG, "WPS: * UUID-R"); 1447 wpabuf_put_be16(msg, ATTR_UUID_R); 1448 wpabuf_put_be16(msg, WPS_UUID_LEN); 1449 wpabuf_put_data(msg, wps->uuid_r, WPS_UUID_LEN); 1450 return 0; 1451 } 1452 1453 1454 static int wps_build_r_hash(struct wps_data *wps, struct wpabuf *msg) 1455 { 1456 u8 *hash; 1457 const u8 *addr[4]; 1458 size_t len[4]; 1459 1460 if (random_get_bytes(wps->snonce, 2 * WPS_SECRET_NONCE_LEN) < 0) 1461 return -1; 1462 wpa_hexdump(MSG_DEBUG, "WPS: R-S1", wps->snonce, WPS_SECRET_NONCE_LEN); 1463 wpa_hexdump(MSG_DEBUG, "WPS: R-S2", 1464 wps->snonce + WPS_SECRET_NONCE_LEN, WPS_SECRET_NONCE_LEN); 1465 1466 if (wps->dh_pubkey_e == NULL || wps->dh_pubkey_r == NULL) { 1467 wpa_printf(MSG_DEBUG, "WPS: DH public keys not available for " 1468 "R-Hash derivation"); 1469 return -1; 1470 } 1471 1472 wpa_printf(MSG_DEBUG, "WPS: * R-Hash1"); 1473 wpabuf_put_be16(msg, ATTR_R_HASH1); 1474 wpabuf_put_be16(msg, SHA256_MAC_LEN); 1475 hash = wpabuf_put(msg, SHA256_MAC_LEN); 1476 /* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */ 1477 addr[0] = wps->snonce; 1478 len[0] = WPS_SECRET_NONCE_LEN; 1479 addr[1] = wps->psk1; 1480 len[1] = WPS_PSK_LEN; 1481 addr[2] = wpabuf_head(wps->dh_pubkey_e); 1482 len[2] = wpabuf_len(wps->dh_pubkey_e); 1483 addr[3] = wpabuf_head(wps->dh_pubkey_r); 1484 len[3] = wpabuf_len(wps->dh_pubkey_r); 1485 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 1486 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash1", hash, SHA256_MAC_LEN); 1487 1488 wpa_printf(MSG_DEBUG, "WPS: * R-Hash2"); 1489 wpabuf_put_be16(msg, ATTR_R_HASH2); 1490 wpabuf_put_be16(msg, SHA256_MAC_LEN); 1491 hash = wpabuf_put(msg, SHA256_MAC_LEN); 1492 /* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */ 1493 addr[0] = wps->snonce + WPS_SECRET_NONCE_LEN; 1494 addr[1] = wps->psk2; 1495 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 1496 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash2", hash, SHA256_MAC_LEN); 1497 1498 return 0; 1499 } 1500 1501 1502 static int wps_build_r_snonce1(struct wps_data *wps, struct wpabuf *msg) 1503 { 1504 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce1"); 1505 wpabuf_put_be16(msg, ATTR_R_SNONCE1); 1506 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN); 1507 wpabuf_put_data(msg, wps->snonce, WPS_SECRET_NONCE_LEN); 1508 return 0; 1509 } 1510 1511 1512 static int wps_build_r_snonce2(struct wps_data *wps, struct wpabuf *msg) 1513 { 1514 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce2"); 1515 wpabuf_put_be16(msg, ATTR_R_SNONCE2); 1516 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN); 1517 wpabuf_put_data(msg, wps->snonce + WPS_SECRET_NONCE_LEN, 1518 WPS_SECRET_NONCE_LEN); 1519 return 0; 1520 } 1521 1522 1523 static int wps_build_cred_network_idx(struct wpabuf *msg, 1524 const struct wps_credential *cred) 1525 { 1526 wpa_printf(MSG_DEBUG, "WPS: * Network Index (1)"); 1527 wpabuf_put_be16(msg, ATTR_NETWORK_INDEX); 1528 wpabuf_put_be16(msg, 1); 1529 wpabuf_put_u8(msg, 1); 1530 return 0; 1531 } 1532 1533 1534 static int wps_build_cred_ssid(struct wpabuf *msg, 1535 const struct wps_credential *cred) 1536 { 1537 wpa_printf(MSG_DEBUG, "WPS: * SSID"); 1538 wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID for Credential", 1539 cred->ssid, cred->ssid_len); 1540 wpabuf_put_be16(msg, ATTR_SSID); 1541 wpabuf_put_be16(msg, cred->ssid_len); 1542 wpabuf_put_data(msg, cred->ssid, cred->ssid_len); 1543 return 0; 1544 } 1545 1546 1547 static int wps_build_cred_auth_type(struct wpabuf *msg, 1548 const struct wps_credential *cred) 1549 { 1550 wpa_printf(MSG_DEBUG, "WPS: * Authentication Type (0x%x)", 1551 cred->auth_type); 1552 wpabuf_put_be16(msg, ATTR_AUTH_TYPE); 1553 wpabuf_put_be16(msg, 2); 1554 wpabuf_put_be16(msg, cred->auth_type); 1555 return 0; 1556 } 1557 1558 1559 static int wps_build_cred_encr_type(struct wpabuf *msg, 1560 const struct wps_credential *cred) 1561 { 1562 wpa_printf(MSG_DEBUG, "WPS: * Encryption Type (0x%x)", 1563 cred->encr_type); 1564 wpabuf_put_be16(msg, ATTR_ENCR_TYPE); 1565 wpabuf_put_be16(msg, 2); 1566 wpabuf_put_be16(msg, cred->encr_type); 1567 return 0; 1568 } 1569 1570 1571 static int wps_build_cred_network_key(struct wpabuf *msg, 1572 const struct wps_credential *cred) 1573 { 1574 wpa_printf(MSG_DEBUG, "WPS: * Network Key (len=%d)", 1575 (int) cred->key_len); 1576 wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key", 1577 cred->key, cred->key_len); 1578 wpabuf_put_be16(msg, ATTR_NETWORK_KEY); 1579 wpabuf_put_be16(msg, cred->key_len); 1580 wpabuf_put_data(msg, cred->key, cred->key_len); 1581 return 0; 1582 } 1583 1584 1585 static int wps_build_credential(struct wpabuf *msg, 1586 const struct wps_credential *cred) 1587 { 1588 if (wps_build_cred_network_idx(msg, cred) || 1589 wps_build_cred_ssid(msg, cred) || 1590 wps_build_cred_auth_type(msg, cred) || 1591 wps_build_cred_encr_type(msg, cred) || 1592 wps_build_cred_network_key(msg, cred) || 1593 wps_build_mac_addr(msg, cred->mac_addr)) 1594 return -1; 1595 return 0; 1596 } 1597 1598 1599 int wps_build_credential_wrap(struct wpabuf *msg, 1600 const struct wps_credential *cred) 1601 { 1602 struct wpabuf *wbuf; 1603 wbuf = wpabuf_alloc(200); 1604 if (wbuf == NULL) 1605 return -1; 1606 if (wps_build_credential(wbuf, cred)) { 1607 wpabuf_clear_free(wbuf); 1608 return -1; 1609 } 1610 wpabuf_put_be16(msg, ATTR_CRED); 1611 wpabuf_put_be16(msg, wpabuf_len(wbuf)); 1612 wpabuf_put_buf(msg, wbuf); 1613 wpabuf_clear_free(wbuf); 1614 return 0; 1615 } 1616 1617 1618 int wps_build_cred(struct wps_data *wps, struct wpabuf *msg) 1619 { 1620 struct wpabuf *cred; 1621 struct wps_registrar *reg = wps->wps->registrar; 1622 const u8 *pskfile_psk; 1623 char hex[65]; 1624 1625 if (wps->wps->registrar->skip_cred_build) 1626 goto skip_cred_build; 1627 1628 wpa_printf(MSG_DEBUG, "WPS: * Credential"); 1629 if (wps->use_cred) { 1630 os_memcpy(&wps->cred, wps->use_cred, sizeof(wps->cred)); 1631 goto use_provided; 1632 } 1633 os_memset(&wps->cred, 0, sizeof(wps->cred)); 1634 1635 if (wps->peer_dev.multi_ap_ext == MULTI_AP_BACKHAUL_STA && 1636 reg->multi_ap_backhaul_ssid_len) { 1637 wpa_printf(MSG_DEBUG, "WPS: Use backhaul STA credentials"); 1638 os_memcpy(wps->cred.ssid, reg->multi_ap_backhaul_ssid, 1639 reg->multi_ap_backhaul_ssid_len); 1640 wps->cred.ssid_len = reg->multi_ap_backhaul_ssid_len; 1641 /* Backhaul is always WPA2PSK */ 1642 wps->cred.auth_type = WPS_AUTH_WPA2PSK; 1643 wps->cred.encr_type = WPS_ENCR_AES; 1644 /* Set MAC address in the Credential to be the Enrollee's MAC 1645 * address 1646 */ 1647 os_memcpy(wps->cred.mac_addr, wps->mac_addr_e, ETH_ALEN); 1648 if (reg->multi_ap_backhaul_network_key) { 1649 os_memcpy(wps->cred.key, 1650 reg->multi_ap_backhaul_network_key, 1651 reg->multi_ap_backhaul_network_key_len); 1652 wps->cred.key_len = 1653 reg->multi_ap_backhaul_network_key_len; 1654 } 1655 goto use_provided; 1656 } 1657 1658 os_memcpy(wps->cred.ssid, wps->wps->ssid, wps->wps->ssid_len); 1659 wps->cred.ssid_len = wps->wps->ssid_len; 1660 1661 /* Select the best authentication and encryption type */ 1662 wpa_printf(MSG_DEBUG, 1663 "WPS: Own auth types 0x%x - masked Enrollee auth types 0x%x", 1664 wps->wps->auth_types, wps->auth_type); 1665 if (wps->auth_type & WPS_AUTH_WPA2PSK) 1666 wps->auth_type = WPS_AUTH_WPA2PSK; 1667 #ifndef CONFIG_NO_TKIP 1668 else if (wps->auth_type & WPS_AUTH_WPAPSK) 1669 wps->auth_type = WPS_AUTH_WPAPSK; 1670 #endif /* CONFIG_NO_TKIP */ 1671 else if (wps->auth_type & WPS_AUTH_OPEN) 1672 wps->auth_type = WPS_AUTH_OPEN; 1673 else { 1674 wpa_printf(MSG_DEBUG, "WPS: Unsupported auth_type 0x%x", 1675 wps->auth_type); 1676 return -1; 1677 } 1678 wps->cred.auth_type = wps->auth_type; 1679 1680 wpa_printf(MSG_DEBUG, 1681 "WPS: Own encr types 0x%x (rsn: 0x%x, wpa: 0x%x) - masked Enrollee encr types 0x%x", 1682 wps->wps->encr_types, wps->wps->encr_types_rsn, 1683 wps->wps->encr_types_wpa, wps->encr_type); 1684 if (wps->wps->ap && wps->auth_type == WPS_AUTH_WPA2PSK) 1685 wps->encr_type &= wps->wps->encr_types_rsn; 1686 else if (wps->wps->ap && wps->auth_type == WPS_AUTH_WPAPSK) 1687 wps->encr_type &= wps->wps->encr_types_wpa; 1688 if (wps->auth_type == WPS_AUTH_WPA2PSK || 1689 wps->auth_type == WPS_AUTH_WPAPSK) { 1690 if (wps->encr_type & WPS_ENCR_AES) 1691 wps->encr_type = WPS_ENCR_AES; 1692 #ifndef CONFIG_NO_TKIP 1693 else if (wps->encr_type & WPS_ENCR_TKIP) 1694 wps->encr_type = WPS_ENCR_TKIP; 1695 #endif /* CONFIG_NO_TKIP */ 1696 else { 1697 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption " 1698 "type for WPA/WPA2"); 1699 return -1; 1700 } 1701 } else { 1702 if (wps->encr_type & WPS_ENCR_NONE) 1703 wps->encr_type = WPS_ENCR_NONE; 1704 #ifdef CONFIG_TESTING_OPTIONS 1705 else if (wps->encr_type & WPS_ENCR_WEP) 1706 wps->encr_type = WPS_ENCR_WEP; 1707 #endif /* CONFIG_TESTING_OPTIONS */ 1708 else { 1709 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption " 1710 "type for non-WPA/WPA2 mode"); 1711 return -1; 1712 } 1713 } 1714 wps->cred.encr_type = wps->encr_type; 1715 /* 1716 * Set MAC address in the Credential to be the Enrollee's MAC address 1717 */ 1718 os_memcpy(wps->cred.mac_addr, wps->mac_addr_e, ETH_ALEN); 1719 1720 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->wps->ap && 1721 !wps->wps->registrar->disable_auto_conf) { 1722 u8 r[16]; 1723 /* Generate a random passphrase */ 1724 if (random_pool_ready() != 1 || 1725 random_get_bytes(r, sizeof(r)) < 0) { 1726 wpa_printf(MSG_INFO, 1727 "WPS: Could not generate random PSK"); 1728 return -1; 1729 } 1730 os_free(wps->new_psk); 1731 wps->new_psk = (u8 *) base64_encode(r, sizeof(r), 1732 &wps->new_psk_len); 1733 if (wps->new_psk == NULL) 1734 return -1; 1735 wps->new_psk_len--; /* remove newline */ 1736 while (wps->new_psk_len && 1737 wps->new_psk[wps->new_psk_len - 1] == '=') 1738 wps->new_psk_len--; 1739 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Generated passphrase", 1740 wps->new_psk, wps->new_psk_len); 1741 os_memcpy(wps->cred.key, wps->new_psk, wps->new_psk_len); 1742 wps->cred.key_len = wps->new_psk_len; 1743 } else if (wps_cp_lookup_pskfile(reg, wps->mac_addr_e, &pskfile_psk)) { 1744 wpa_hexdump_key(MSG_DEBUG, "WPS: Use PSK from wpa_psk_file", 1745 pskfile_psk, PMK_LEN); 1746 wpa_snprintf_hex(hex, sizeof(hex), pskfile_psk, PMK_LEN); 1747 os_memcpy(wps->cred.key, hex, PMK_LEN * 2); 1748 wps->cred.key_len = PMK_LEN * 2; 1749 } else if (!wps->wps->registrar->force_per_enrollee_psk && 1750 wps->use_psk_key && wps->wps->psk_set) { 1751 wpa_printf(MSG_DEBUG, "WPS: Use PSK format for Network Key"); 1752 wpa_snprintf_hex(hex, sizeof(hex), wps->wps->psk, PMK_LEN); 1753 os_memcpy(wps->cred.key, hex, PMK_LEN * 2); 1754 wps->cred.key_len = PMK_LEN * 2; 1755 } else if ((!wps->wps->registrar->force_per_enrollee_psk || 1756 wps->wps->use_passphrase) && wps->wps->network_key) { 1757 wpa_printf(MSG_DEBUG, 1758 "WPS: Use passphrase format for Network key"); 1759 os_memcpy(wps->cred.key, wps->wps->network_key, 1760 wps->wps->network_key_len); 1761 wps->cred.key_len = wps->wps->network_key_len; 1762 } else if (wps->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) { 1763 /* Generate a random per-device PSK */ 1764 os_free(wps->new_psk); 1765 wps->new_psk_len = PMK_LEN; 1766 wps->new_psk = os_malloc(wps->new_psk_len); 1767 if (wps->new_psk == NULL) 1768 return -1; 1769 if (random_pool_ready() != 1 || 1770 random_get_bytes(wps->new_psk, wps->new_psk_len) < 0) { 1771 wpa_printf(MSG_INFO, 1772 "WPS: Could not generate random PSK"); 1773 os_free(wps->new_psk); 1774 wps->new_psk = NULL; 1775 return -1; 1776 } 1777 wpa_hexdump_key(MSG_DEBUG, "WPS: Generated per-device PSK", 1778 wps->new_psk, wps->new_psk_len); 1779 wpa_snprintf_hex(hex, sizeof(hex), wps->new_psk, 1780 wps->new_psk_len); 1781 os_memcpy(wps->cred.key, hex, wps->new_psk_len * 2); 1782 wps->cred.key_len = wps->new_psk_len * 2; 1783 } 1784 1785 use_provided: 1786 #ifdef CONFIG_WPS_TESTING 1787 if (wps_testing_stub_cred) 1788 cred = wpabuf_alloc(200); 1789 else 1790 cred = NULL; 1791 if (cred) { 1792 struct wps_credential stub; 1793 wpa_printf(MSG_DEBUG, "WPS: Add stub credential"); 1794 os_memset(&stub, 0, sizeof(stub)); 1795 os_memcpy(stub.ssid, "stub", 5); 1796 stub.ssid_len = 5; 1797 stub.auth_type = WPS_AUTH_WPA2PSK; 1798 stub.encr_type = WPS_ENCR_AES; 1799 os_memcpy(stub.key, "stub psk", 9); 1800 stub.key_len = 9; 1801 os_memcpy(stub.mac_addr, wps->mac_addr_e, ETH_ALEN); 1802 wps_build_credential(cred, &stub); 1803 wpa_hexdump_buf(MSG_DEBUG, "WPS: Stub Credential", cred); 1804 1805 wpabuf_put_be16(msg, ATTR_CRED); 1806 wpabuf_put_be16(msg, wpabuf_len(cred)); 1807 wpabuf_put_buf(msg, cred); 1808 1809 wpabuf_free(cred); 1810 } 1811 #endif /* CONFIG_WPS_TESTING */ 1812 1813 cred = wpabuf_alloc(200); 1814 if (cred == NULL) 1815 return -1; 1816 1817 if (wps_build_credential(cred, &wps->cred)) { 1818 wpabuf_clear_free(cred); 1819 return -1; 1820 } 1821 1822 wpabuf_put_be16(msg, ATTR_CRED); 1823 wpabuf_put_be16(msg, wpabuf_len(cred)); 1824 wpabuf_put_buf(msg, cred); 1825 wpabuf_clear_free(cred); 1826 1827 skip_cred_build: 1828 if (wps->wps->registrar->extra_cred) { 1829 wpa_printf(MSG_DEBUG, "WPS: * Credential (pre-configured)"); 1830 wpabuf_put_buf(msg, wps->wps->registrar->extra_cred); 1831 } 1832 1833 return 0; 1834 } 1835 1836 1837 static int wps_build_ap_settings(struct wps_data *wps, struct wpabuf *msg) 1838 { 1839 wpa_printf(MSG_DEBUG, "WPS: * AP Settings"); 1840 1841 if (wps_build_credential(msg, &wps->cred)) 1842 return -1; 1843 1844 return 0; 1845 } 1846 1847 1848 static struct wpabuf * wps_build_ap_cred(struct wps_data *wps) 1849 { 1850 struct wpabuf *msg, *plain; 1851 1852 msg = wpabuf_alloc(1000); 1853 if (msg == NULL) 1854 return NULL; 1855 1856 plain = wpabuf_alloc(200); 1857 if (plain == NULL) { 1858 wpabuf_free(msg); 1859 return NULL; 1860 } 1861 1862 if (wps_build_ap_settings(wps, plain)) { 1863 wpabuf_clear_free(plain); 1864 wpabuf_free(msg); 1865 return NULL; 1866 } 1867 1868 wpabuf_put_be16(msg, ATTR_CRED); 1869 wpabuf_put_be16(msg, wpabuf_len(plain)); 1870 wpabuf_put_buf(msg, plain); 1871 wpabuf_clear_free(plain); 1872 1873 return msg; 1874 } 1875 1876 1877 static struct wpabuf * wps_build_m2(struct wps_data *wps) 1878 { 1879 struct wpabuf *msg; 1880 int config_in_m2 = 0; 1881 1882 if (random_get_bytes(wps->nonce_r, WPS_NONCE_LEN) < 0) 1883 return NULL; 1884 wpa_hexdump(MSG_DEBUG, "WPS: Registrar Nonce", 1885 wps->nonce_r, WPS_NONCE_LEN); 1886 wpa_hexdump(MSG_DEBUG, "WPS: UUID-R", wps->uuid_r, WPS_UUID_LEN); 1887 1888 wpa_printf(MSG_DEBUG, "WPS: Building Message M2"); 1889 msg = wpabuf_alloc(1000); 1890 if (msg == NULL) 1891 return NULL; 1892 1893 if (wps_build_version(msg) || 1894 wps_build_msg_type(msg, WPS_M2) || 1895 wps_build_enrollee_nonce(wps, msg) || 1896 wps_build_registrar_nonce(wps, msg) || 1897 wps_build_uuid_r(wps, msg) || 1898 wps_build_public_key(wps, msg) || 1899 wps_derive_keys(wps) || 1900 wps_build_auth_type_flags(wps, msg) || 1901 wps_build_encr_type_flags(wps, msg) || 1902 wps_build_conn_type_flags(wps, msg) || 1903 wps_build_config_methods_r(wps->wps->registrar, msg) || 1904 wps_build_device_attrs(&wps->wps->dev, msg) || 1905 wps_build_rf_bands(&wps->wps->dev, msg, 1906 wps->wps->rf_band_cb(wps->wps->cb_ctx)) || 1907 wps_build_assoc_state(wps, msg) || 1908 wps_build_config_error(msg, WPS_CFG_NO_ERROR) || 1909 wps_build_dev_password_id(msg, wps->dev_pw_id) || 1910 wps_build_os_version(&wps->wps->dev, msg) || 1911 wps_build_wfa_ext(msg, 0, NULL, 0, 0)) { 1912 wpabuf_free(msg); 1913 return NULL; 1914 } 1915 1916 #ifdef CONFIG_WPS_NFC 1917 if (wps->nfc_pw_token && wps->nfc_pw_token->pk_hash_provided_oob && 1918 wps->nfc_pw_token->pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) { 1919 /* 1920 * Use abbreviated handshake since public key hash allowed 1921 * Enrollee to validate our public key similarly to how Enrollee 1922 * public key was validated. There is no need to validate Device 1923 * Password in this case. 1924 */ 1925 struct wpabuf *plain = wpabuf_alloc(500); 1926 if (plain == NULL || 1927 wps_build_cred(wps, plain) || 1928 wps_build_key_wrap_auth(wps, plain) || 1929 wps_build_encr_settings(wps, msg, plain)) { 1930 wpabuf_free(msg); 1931 wpabuf_clear_free(plain); 1932 return NULL; 1933 } 1934 wpabuf_clear_free(plain); 1935 config_in_m2 = 1; 1936 } 1937 #endif /* CONFIG_WPS_NFC */ 1938 1939 if (wps_build_authenticator(wps, msg)) { 1940 wpabuf_free(msg); 1941 return NULL; 1942 } 1943 1944 wps->int_reg = 1; 1945 wps->state = config_in_m2 ? RECV_DONE : RECV_M3; 1946 return msg; 1947 } 1948 1949 1950 static struct wpabuf * wps_build_m2d(struct wps_data *wps) 1951 { 1952 struct wpabuf *msg; 1953 u16 err = wps->config_error; 1954 1955 wpa_printf(MSG_DEBUG, "WPS: Building Message M2D"); 1956 msg = wpabuf_alloc(1000); 1957 if (msg == NULL) 1958 return NULL; 1959 1960 if (wps->wps->ap && wps->wps->ap_setup_locked && 1961 err == WPS_CFG_NO_ERROR) 1962 err = WPS_CFG_SETUP_LOCKED; 1963 1964 if (wps_build_version(msg) || 1965 wps_build_msg_type(msg, WPS_M2D) || 1966 wps_build_enrollee_nonce(wps, msg) || 1967 wps_build_registrar_nonce(wps, msg) || 1968 wps_build_uuid_r(wps, msg) || 1969 wps_build_auth_type_flags(wps, msg) || 1970 wps_build_encr_type_flags(wps, msg) || 1971 wps_build_conn_type_flags(wps, msg) || 1972 wps_build_config_methods_r(wps->wps->registrar, msg) || 1973 wps_build_device_attrs(&wps->wps->dev, msg) || 1974 wps_build_rf_bands(&wps->wps->dev, msg, 1975 wps->wps->rf_band_cb(wps->wps->cb_ctx)) || 1976 wps_build_assoc_state(wps, msg) || 1977 wps_build_config_error(msg, err) || 1978 wps_build_os_version(&wps->wps->dev, msg) || 1979 wps_build_wfa_ext(msg, 0, NULL, 0, 0)) { 1980 wpabuf_free(msg); 1981 return NULL; 1982 } 1983 1984 wps->state = RECV_M2D_ACK; 1985 return msg; 1986 } 1987 1988 1989 static struct wpabuf * wps_build_m4(struct wps_data *wps) 1990 { 1991 struct wpabuf *msg, *plain; 1992 1993 wpa_printf(MSG_DEBUG, "WPS: Building Message M4"); 1994 1995 if (wps_derive_psk(wps, wps->dev_password, wps->dev_password_len) < 0) 1996 return NULL; 1997 1998 plain = wpabuf_alloc(200); 1999 if (plain == NULL) 2000 return NULL; 2001 2002 msg = wpabuf_alloc(1000); 2003 if (msg == NULL) { 2004 wpabuf_free(plain); 2005 return NULL; 2006 } 2007 2008 if (wps_build_version(msg) || 2009 wps_build_msg_type(msg, WPS_M4) || 2010 wps_build_enrollee_nonce(wps, msg) || 2011 wps_build_r_hash(wps, msg) || 2012 wps_build_r_snonce1(wps, plain) || 2013 wps_build_key_wrap_auth(wps, plain) || 2014 wps_build_encr_settings(wps, msg, plain) || 2015 wps_build_wfa_ext(msg, 0, NULL, 0, 0) || 2016 wps_build_authenticator(wps, msg)) { 2017 wpabuf_clear_free(plain); 2018 wpabuf_free(msg); 2019 return NULL; 2020 } 2021 wpabuf_clear_free(plain); 2022 2023 wps->state = RECV_M5; 2024 return msg; 2025 } 2026 2027 2028 static struct wpabuf * wps_build_m6(struct wps_data *wps) 2029 { 2030 struct wpabuf *msg, *plain; 2031 2032 wpa_printf(MSG_DEBUG, "WPS: Building Message M6"); 2033 2034 plain = wpabuf_alloc(200); 2035 if (plain == NULL) 2036 return NULL; 2037 2038 msg = wpabuf_alloc(1000); 2039 if (msg == NULL) { 2040 wpabuf_free(plain); 2041 return NULL; 2042 } 2043 2044 if (wps_build_version(msg) || 2045 wps_build_msg_type(msg, WPS_M6) || 2046 wps_build_enrollee_nonce(wps, msg) || 2047 wps_build_r_snonce2(wps, plain) || 2048 wps_build_key_wrap_auth(wps, plain) || 2049 wps_build_encr_settings(wps, msg, plain) || 2050 wps_build_wfa_ext(msg, 0, NULL, 0, 0) || 2051 wps_build_authenticator(wps, msg)) { 2052 wpabuf_clear_free(plain); 2053 wpabuf_free(msg); 2054 return NULL; 2055 } 2056 wpabuf_clear_free(plain); 2057 2058 wps->wps_pin_revealed = 1; 2059 wps->state = RECV_M7; 2060 return msg; 2061 } 2062 2063 2064 static struct wpabuf * wps_build_m8(struct wps_data *wps) 2065 { 2066 struct wpabuf *msg, *plain; 2067 2068 wpa_printf(MSG_DEBUG, "WPS: Building Message M8"); 2069 2070 plain = wpabuf_alloc(500); 2071 if (plain == NULL) 2072 return NULL; 2073 2074 msg = wpabuf_alloc(1000); 2075 if (msg == NULL) { 2076 wpabuf_free(plain); 2077 return NULL; 2078 } 2079 2080 if (wps_build_version(msg) || 2081 wps_build_msg_type(msg, WPS_M8) || 2082 wps_build_enrollee_nonce(wps, msg) || 2083 ((wps->wps->ap || wps->er) && wps_build_cred(wps, plain)) || 2084 (!wps->wps->ap && !wps->er && wps_build_ap_settings(wps, plain)) || 2085 wps_build_key_wrap_auth(wps, plain) || 2086 wps_build_encr_settings(wps, msg, plain) || 2087 wps_build_wfa_ext(msg, 0, NULL, 0, 0) || 2088 wps_build_authenticator(wps, msg)) { 2089 wpabuf_clear_free(plain); 2090 wpabuf_clear_free(msg); 2091 return NULL; 2092 } 2093 wpabuf_clear_free(plain); 2094 2095 wps->state = RECV_DONE; 2096 return msg; 2097 } 2098 2099 2100 struct wpabuf * wps_registrar_get_msg(struct wps_data *wps, 2101 enum wsc_op_code *op_code) 2102 { 2103 struct wpabuf *msg; 2104 2105 #ifdef CONFIG_WPS_UPNP 2106 if (!wps->int_reg && wps->wps->wps_upnp) { 2107 struct upnp_pending_message *p, *prev = NULL; 2108 if (wps->ext_reg > 1) 2109 wps_registrar_free_pending_m2(wps->wps); 2110 p = wps->wps->upnp_msgs; 2111 /* TODO: check pending message MAC address */ 2112 while (p && p->next) { 2113 prev = p; 2114 p = p->next; 2115 } 2116 if (p) { 2117 wpa_printf(MSG_DEBUG, "WPS: Use pending message from " 2118 "UPnP"); 2119 if (prev) 2120 prev->next = NULL; 2121 else 2122 wps->wps->upnp_msgs = NULL; 2123 msg = p->msg; 2124 switch (p->type) { 2125 case WPS_WSC_ACK: 2126 *op_code = WSC_ACK; 2127 break; 2128 case WPS_WSC_NACK: 2129 *op_code = WSC_NACK; 2130 break; 2131 default: 2132 *op_code = WSC_MSG; 2133 break; 2134 } 2135 os_free(p); 2136 if (wps->ext_reg == 0) 2137 wps->ext_reg = 1; 2138 return msg; 2139 } 2140 } 2141 if (wps->ext_reg) { 2142 wpa_printf(MSG_DEBUG, "WPS: Using external Registrar, but no " 2143 "pending message available"); 2144 return NULL; 2145 } 2146 #endif /* CONFIG_WPS_UPNP */ 2147 2148 switch (wps->state) { 2149 case SEND_M2: 2150 if (wps_get_dev_password(wps) < 0) 2151 msg = wps_build_m2d(wps); 2152 else 2153 msg = wps_build_m2(wps); 2154 *op_code = WSC_MSG; 2155 break; 2156 case SEND_M2D: 2157 msg = wps_build_m2d(wps); 2158 *op_code = WSC_MSG; 2159 break; 2160 case SEND_M4: 2161 msg = wps_build_m4(wps); 2162 *op_code = WSC_MSG; 2163 break; 2164 case SEND_M6: 2165 msg = wps_build_m6(wps); 2166 *op_code = WSC_MSG; 2167 break; 2168 case SEND_M8: 2169 msg = wps_build_m8(wps); 2170 *op_code = WSC_MSG; 2171 break; 2172 case RECV_DONE: 2173 msg = wps_build_wsc_ack(wps); 2174 *op_code = WSC_ACK; 2175 break; 2176 case SEND_WSC_NACK: 2177 msg = wps_build_wsc_nack(wps); 2178 *op_code = WSC_NACK; 2179 break; 2180 default: 2181 wpa_printf(MSG_DEBUG, "WPS: Unsupported state %d for building " 2182 "a message", wps->state); 2183 msg = NULL; 2184 break; 2185 } 2186 2187 if (*op_code == WSC_MSG && msg) { 2188 /* Save a copy of the last message for Authenticator derivation 2189 */ 2190 wpabuf_free(wps->last_msg); 2191 wps->last_msg = wpabuf_dup(msg); 2192 } 2193 2194 return msg; 2195 } 2196 2197 2198 static int wps_process_enrollee_nonce(struct wps_data *wps, const u8 *e_nonce) 2199 { 2200 if (e_nonce == NULL) { 2201 wpa_printf(MSG_DEBUG, "WPS: No Enrollee Nonce received"); 2202 return -1; 2203 } 2204 2205 os_memcpy(wps->nonce_e, e_nonce, WPS_NONCE_LEN); 2206 wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce", 2207 wps->nonce_e, WPS_NONCE_LEN); 2208 2209 return 0; 2210 } 2211 2212 2213 static int wps_process_registrar_nonce(struct wps_data *wps, const u8 *r_nonce) 2214 { 2215 if (r_nonce == NULL) { 2216 wpa_printf(MSG_DEBUG, "WPS: No Registrar Nonce received"); 2217 return -1; 2218 } 2219 2220 if (os_memcmp(wps->nonce_r, r_nonce, WPS_NONCE_LEN) != 0) { 2221 wpa_printf(MSG_DEBUG, "WPS: Invalid Registrar Nonce received"); 2222 return -1; 2223 } 2224 2225 return 0; 2226 } 2227 2228 2229 static int wps_process_uuid_e(struct wps_data *wps, const u8 *uuid_e) 2230 { 2231 if (uuid_e == NULL) { 2232 wpa_printf(MSG_DEBUG, "WPS: No UUID-E received"); 2233 return -1; 2234 } 2235 2236 os_memcpy(wps->uuid_e, uuid_e, WPS_UUID_LEN); 2237 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", wps->uuid_e, WPS_UUID_LEN); 2238 2239 return 0; 2240 } 2241 2242 2243 static int wps_process_dev_password_id(struct wps_data *wps, const u8 *pw_id) 2244 { 2245 if (pw_id == NULL) { 2246 wpa_printf(MSG_DEBUG, "WPS: No Device Password ID received"); 2247 return -1; 2248 } 2249 2250 wps->dev_pw_id = WPA_GET_BE16(pw_id); 2251 wpa_printf(MSG_DEBUG, "WPS: Device Password ID %d", wps->dev_pw_id); 2252 2253 return 0; 2254 } 2255 2256 2257 static int wps_process_e_hash1(struct wps_data *wps, const u8 *e_hash1) 2258 { 2259 if (e_hash1 == NULL) { 2260 wpa_printf(MSG_DEBUG, "WPS: No E-Hash1 received"); 2261 return -1; 2262 } 2263 2264 os_memcpy(wps->peer_hash1, e_hash1, WPS_HASH_LEN); 2265 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash1", wps->peer_hash1, WPS_HASH_LEN); 2266 2267 return 0; 2268 } 2269 2270 2271 static int wps_process_e_hash2(struct wps_data *wps, const u8 *e_hash2) 2272 { 2273 if (e_hash2 == NULL) { 2274 wpa_printf(MSG_DEBUG, "WPS: No E-Hash2 received"); 2275 return -1; 2276 } 2277 2278 os_memcpy(wps->peer_hash2, e_hash2, WPS_HASH_LEN); 2279 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash2", wps->peer_hash2, WPS_HASH_LEN); 2280 2281 return 0; 2282 } 2283 2284 2285 static int wps_process_e_snonce1(struct wps_data *wps, const u8 *e_snonce1) 2286 { 2287 u8 hash[SHA256_MAC_LEN]; 2288 const u8 *addr[4]; 2289 size_t len[4]; 2290 2291 if (e_snonce1 == NULL) { 2292 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce1 received"); 2293 return -1; 2294 } 2295 2296 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce1", e_snonce1, 2297 WPS_SECRET_NONCE_LEN); 2298 2299 /* E-Hash1 = HMAC_AuthKey(E-S1 || PSK1 || PK_E || PK_R) */ 2300 addr[0] = e_snonce1; 2301 len[0] = WPS_SECRET_NONCE_LEN; 2302 addr[1] = wps->psk1; 2303 len[1] = WPS_PSK_LEN; 2304 addr[2] = wpabuf_head(wps->dh_pubkey_e); 2305 len[2] = wpabuf_len(wps->dh_pubkey_e); 2306 addr[3] = wpabuf_head(wps->dh_pubkey_r); 2307 len[3] = wpabuf_len(wps->dh_pubkey_r); 2308 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 2309 2310 if (os_memcmp_const(wps->peer_hash1, hash, WPS_HASH_LEN) != 0) { 2311 wpa_printf(MSG_DEBUG, "WPS: E-Hash1 derived from E-S1 does " 2312 "not match with the pre-committed value"); 2313 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE; 2314 wps_pwd_auth_fail_event(wps->wps, 0, 1, wps->mac_addr_e); 2315 return -1; 2316 } 2317 2318 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the first " 2319 "half of the device password"); 2320 2321 return 0; 2322 } 2323 2324 2325 static int wps_process_e_snonce2(struct wps_data *wps, const u8 *e_snonce2) 2326 { 2327 u8 hash[SHA256_MAC_LEN]; 2328 const u8 *addr[4]; 2329 size_t len[4]; 2330 2331 if (e_snonce2 == NULL) { 2332 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce2 received"); 2333 return -1; 2334 } 2335 2336 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce2", e_snonce2, 2337 WPS_SECRET_NONCE_LEN); 2338 2339 /* E-Hash2 = HMAC_AuthKey(E-S2 || PSK2 || PK_E || PK_R) */ 2340 addr[0] = e_snonce2; 2341 len[0] = WPS_SECRET_NONCE_LEN; 2342 addr[1] = wps->psk2; 2343 len[1] = WPS_PSK_LEN; 2344 addr[2] = wpabuf_head(wps->dh_pubkey_e); 2345 len[2] = wpabuf_len(wps->dh_pubkey_e); 2346 addr[3] = wpabuf_head(wps->dh_pubkey_r); 2347 len[3] = wpabuf_len(wps->dh_pubkey_r); 2348 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 2349 2350 if (os_memcmp_const(wps->peer_hash2, hash, WPS_HASH_LEN) != 0) { 2351 wpa_printf(MSG_DEBUG, "WPS: E-Hash2 derived from E-S2 does " 2352 "not match with the pre-committed value"); 2353 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e); 2354 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE; 2355 wps_pwd_auth_fail_event(wps->wps, 0, 2, wps->mac_addr_e); 2356 return -1; 2357 } 2358 2359 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the second " 2360 "half of the device password"); 2361 wps->wps_pin_revealed = 0; 2362 wps_registrar_unlock_pin(wps->wps->registrar, wps->uuid_e); 2363 2364 /* 2365 * In case wildcard PIN is used and WPS handshake succeeds in the first 2366 * attempt, wps_registrar_unlock_pin() would not free the PIN, so make 2367 * sure the PIN gets invalidated here. 2368 */ 2369 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e); 2370 2371 return 0; 2372 } 2373 2374 2375 static int wps_process_mac_addr(struct wps_data *wps, const u8 *mac_addr) 2376 { 2377 if (mac_addr == NULL) { 2378 wpa_printf(MSG_DEBUG, "WPS: No MAC Address received"); 2379 return -1; 2380 } 2381 2382 wpa_printf(MSG_DEBUG, "WPS: Enrollee MAC Address " MACSTR, 2383 MAC2STR(mac_addr)); 2384 os_memcpy(wps->mac_addr_e, mac_addr, ETH_ALEN); 2385 os_memcpy(wps->peer_dev.mac_addr, mac_addr, ETH_ALEN); 2386 2387 return 0; 2388 } 2389 2390 2391 static int wps_process_pubkey(struct wps_data *wps, const u8 *pk, 2392 size_t pk_len) 2393 { 2394 if (pk == NULL || pk_len == 0) { 2395 wpa_printf(MSG_DEBUG, "WPS: No Public Key received"); 2396 return -1; 2397 } 2398 2399 wpabuf_free(wps->dh_pubkey_e); 2400 wps->dh_pubkey_e = wpabuf_alloc_copy(pk, pk_len); 2401 if (wps->dh_pubkey_e == NULL) 2402 return -1; 2403 2404 return 0; 2405 } 2406 2407 2408 static int wps_process_auth_type_flags(struct wps_data *wps, const u8 *auth) 2409 { 2410 u16 auth_types; 2411 2412 if (auth == NULL) { 2413 wpa_printf(MSG_DEBUG, "WPS: No Authentication Type flags " 2414 "received"); 2415 return -1; 2416 } 2417 2418 auth_types = WPA_GET_BE16(auth); 2419 2420 wpa_printf(MSG_DEBUG, "WPS: Enrollee Authentication Type flags 0x%x", 2421 auth_types); 2422 #ifdef WPS_WORKAROUNDS 2423 /* 2424 * Some deployed implementations seem to advertise incorrect information 2425 * in this attribute. A value of 0x1b (WPA2 + WPA + WPAPSK + OPEN, but 2426 * no WPA2PSK) has been reported to be used. Add WPA2PSK to the list to 2427 * avoid issues with building Credentials that do not use the strongest 2428 * actually supported authentication option (that device does support 2429 * WPA2PSK even when it does not claim it here). 2430 */ 2431 if ((auth_types & 2432 (WPS_AUTH_WPA2 | WPS_AUTH_WPA2PSK | WPS_AUTH_WPAPSK)) == 2433 (WPS_AUTH_WPA2 | WPS_AUTH_WPAPSK)) { 2434 wpa_printf(MSG_DEBUG, 2435 "WPS: Workaround - assume Enrollee supports WPA2PSK based on claimed WPA2 support"); 2436 auth_types |= WPS_AUTH_WPA2PSK; 2437 } 2438 #endif /* WPS_WORKAROUNDS */ 2439 wps->auth_type = wps->wps->auth_types & auth_types; 2440 if (wps->auth_type == 0) { 2441 wpa_printf(MSG_DEBUG, "WPS: No match in supported " 2442 "authentication types (own 0x%x Enrollee 0x%x)", 2443 wps->wps->auth_types, auth_types); 2444 #ifdef WPS_WORKAROUNDS 2445 /* 2446 * Some deployed implementations seem to advertise incorrect 2447 * information in this attribute. For example, Linksys WRT350N 2448 * seems to have a byteorder bug that breaks this negotiation. 2449 * In order to interoperate with existing implementations, 2450 * assume that the Enrollee supports everything we do. 2451 */ 2452 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee " 2453 "does not advertise supported authentication types " 2454 "correctly"); 2455 wps->auth_type = wps->wps->auth_types; 2456 #else /* WPS_WORKAROUNDS */ 2457 return -1; 2458 #endif /* WPS_WORKAROUNDS */ 2459 } 2460 2461 return 0; 2462 } 2463 2464 2465 static int wps_process_encr_type_flags(struct wps_data *wps, const u8 *encr) 2466 { 2467 u16 encr_types; 2468 2469 if (encr == NULL) { 2470 wpa_printf(MSG_DEBUG, "WPS: No Encryption Type flags " 2471 "received"); 2472 return -1; 2473 } 2474 2475 encr_types = WPA_GET_BE16(encr); 2476 2477 wpa_printf(MSG_DEBUG, "WPS: Enrollee Encryption Type flags 0x%x", 2478 encr_types); 2479 wps->encr_type = wps->wps->encr_types & encr_types; 2480 if (wps->encr_type == 0) { 2481 wpa_printf(MSG_DEBUG, "WPS: No match in supported " 2482 "encryption types (own 0x%x Enrollee 0x%x)", 2483 wps->wps->encr_types, encr_types); 2484 #ifdef WPS_WORKAROUNDS 2485 /* 2486 * Some deployed implementations seem to advertise incorrect 2487 * information in this attribute. For example, Linksys WRT350N 2488 * seems to have a byteorder bug that breaks this negotiation. 2489 * In order to interoperate with existing implementations, 2490 * assume that the Enrollee supports everything we do. 2491 */ 2492 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee " 2493 "does not advertise supported encryption types " 2494 "correctly"); 2495 wps->encr_type = wps->wps->encr_types; 2496 #else /* WPS_WORKAROUNDS */ 2497 return -1; 2498 #endif /* WPS_WORKAROUNDS */ 2499 } 2500 2501 return 0; 2502 } 2503 2504 2505 static int wps_process_conn_type_flags(struct wps_data *wps, const u8 *conn) 2506 { 2507 if (conn == NULL) { 2508 wpa_printf(MSG_DEBUG, "WPS: No Connection Type flags " 2509 "received"); 2510 return -1; 2511 } 2512 2513 wpa_printf(MSG_DEBUG, "WPS: Enrollee Connection Type flags 0x%x", 2514 *conn); 2515 2516 return 0; 2517 } 2518 2519 2520 static int wps_process_config_methods(struct wps_data *wps, const u8 *methods) 2521 { 2522 u16 m; 2523 2524 if (methods == NULL) { 2525 wpa_printf(MSG_DEBUG, "WPS: No Config Methods received"); 2526 return -1; 2527 } 2528 2529 m = WPA_GET_BE16(methods); 2530 2531 wpa_printf(MSG_DEBUG, "WPS: Enrollee Config Methods 0x%x" 2532 "%s%s%s%s%s%s%s%s%s", m, 2533 m & WPS_CONFIG_USBA ? " [USBA]" : "", 2534 m & WPS_CONFIG_ETHERNET ? " [Ethernet]" : "", 2535 m & WPS_CONFIG_LABEL ? " [Label]" : "", 2536 m & WPS_CONFIG_DISPLAY ? " [Display]" : "", 2537 m & WPS_CONFIG_EXT_NFC_TOKEN ? " [Ext NFC Token]" : "", 2538 m & WPS_CONFIG_INT_NFC_TOKEN ? " [Int NFC Token]" : "", 2539 m & WPS_CONFIG_NFC_INTERFACE ? " [NFC]" : "", 2540 m & WPS_CONFIG_PUSHBUTTON ? " [PBC]" : "", 2541 m & WPS_CONFIG_KEYPAD ? " [Keypad]" : ""); 2542 2543 if (!(m & WPS_CONFIG_DISPLAY) && !wps->use_psk_key) { 2544 /* 2545 * The Enrollee does not have a display so it is unlikely to be 2546 * able to show the passphrase to a user and as such, could 2547 * benefit from receiving PSK to reduce key derivation time. 2548 */ 2549 wpa_printf(MSG_DEBUG, "WPS: Prefer PSK format key due to " 2550 "Enrollee not supporting display"); 2551 wps->use_psk_key = 1; 2552 } 2553 2554 return 0; 2555 } 2556 2557 2558 static int wps_process_wps_state(struct wps_data *wps, const u8 *state) 2559 { 2560 if (state == NULL) { 2561 wpa_printf(MSG_DEBUG, "WPS: No Wi-Fi Protected Setup State " 2562 "received"); 2563 return -1; 2564 } 2565 2566 wpa_printf(MSG_DEBUG, "WPS: Enrollee Wi-Fi Protected Setup State %d", 2567 *state); 2568 2569 return 0; 2570 } 2571 2572 2573 static int wps_process_assoc_state(struct wps_data *wps, const u8 *assoc) 2574 { 2575 u16 a; 2576 2577 if (assoc == NULL) { 2578 wpa_printf(MSG_DEBUG, "WPS: No Association State received"); 2579 return -1; 2580 } 2581 2582 a = WPA_GET_BE16(assoc); 2583 wpa_printf(MSG_DEBUG, "WPS: Enrollee Association State %d", a); 2584 2585 return 0; 2586 } 2587 2588 2589 static int wps_process_config_error(struct wps_data *wps, const u8 *err) 2590 { 2591 u16 e; 2592 2593 if (err == NULL) { 2594 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error received"); 2595 return -1; 2596 } 2597 2598 e = WPA_GET_BE16(err); 2599 wpa_printf(MSG_DEBUG, "WPS: Enrollee Configuration Error %d", e); 2600 2601 return 0; 2602 } 2603 2604 2605 static int wps_registrar_p2p_dev_addr_match(struct wps_data *wps) 2606 { 2607 #ifdef CONFIG_P2P 2608 struct wps_registrar *reg = wps->wps->registrar; 2609 2610 if (is_zero_ether_addr(reg->p2p_dev_addr)) 2611 return 1; /* no filtering in use */ 2612 2613 if (!ether_addr_equal(reg->p2p_dev_addr, wps->p2p_dev_addr)) { 2614 wpa_printf(MSG_DEBUG, "WPS: No match on P2P Device Address " 2615 "filtering for PBC: expected " MACSTR " was " 2616 MACSTR " - indicate PBC session overlap", 2617 MAC2STR(reg->p2p_dev_addr), 2618 MAC2STR(wps->p2p_dev_addr)); 2619 return 0; 2620 } 2621 #endif /* CONFIG_P2P */ 2622 return 1; 2623 } 2624 2625 2626 static int wps_registrar_skip_overlap(struct wps_data *wps) 2627 { 2628 #ifdef CONFIG_P2P 2629 struct wps_registrar *reg = wps->wps->registrar; 2630 2631 if (is_zero_ether_addr(reg->p2p_dev_addr)) 2632 return 0; /* no specific Enrollee selected */ 2633 2634 if (ether_addr_equal(reg->p2p_dev_addr, wps->p2p_dev_addr)) { 2635 wpa_printf(MSG_DEBUG, "WPS: Skip PBC overlap due to selected " 2636 "Enrollee match"); 2637 return 1; 2638 } 2639 #endif /* CONFIG_P2P */ 2640 return 0; 2641 } 2642 2643 2644 static enum wps_process_res wps_process_m1(struct wps_data *wps, 2645 struct wps_parse_attr *attr) 2646 { 2647 wpa_printf(MSG_DEBUG, "WPS: Received M1"); 2648 2649 if (wps->state != RECV_M1) { 2650 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2651 "receiving M1", wps->state); 2652 return WPS_FAILURE; 2653 } 2654 2655 if (wps_process_uuid_e(wps, attr->uuid_e) || 2656 wps_process_mac_addr(wps, attr->mac_addr) || 2657 wps_process_enrollee_nonce(wps, attr->enrollee_nonce) || 2658 wps_process_pubkey(wps, attr->public_key, attr->public_key_len) || 2659 wps_process_auth_type_flags(wps, attr->auth_type_flags) || 2660 wps_process_encr_type_flags(wps, attr->encr_type_flags) || 2661 wps_process_conn_type_flags(wps, attr->conn_type_flags) || 2662 wps_process_config_methods(wps, attr->config_methods) || 2663 wps_process_wps_state(wps, attr->wps_state) || 2664 wps_process_device_attrs(&wps->peer_dev, attr) || 2665 wps_process_rf_bands(&wps->peer_dev, attr->rf_bands) || 2666 wps_process_assoc_state(wps, attr->assoc_state) || 2667 wps_process_dev_password_id(wps, attr->dev_password_id) || 2668 wps_process_config_error(wps, attr->config_error) || 2669 wps_process_os_version(&wps->peer_dev, attr->os_version)) 2670 return WPS_FAILURE; 2671 2672 if (wps->dev_pw_id < 0x10 && 2673 wps->dev_pw_id != DEV_PW_DEFAULT && 2674 wps->dev_pw_id != DEV_PW_P2PS_DEFAULT && 2675 wps->dev_pw_id != DEV_PW_USER_SPECIFIED && 2676 wps->dev_pw_id != DEV_PW_MACHINE_SPECIFIED && 2677 wps->dev_pw_id != DEV_PW_REGISTRAR_SPECIFIED && 2678 #ifdef CONFIG_WPS_NFC 2679 wps->dev_pw_id != DEV_PW_NFC_CONNECTION_HANDOVER && 2680 #endif /* CONFIG_WPS_NFC */ 2681 (wps->dev_pw_id != DEV_PW_PUSHBUTTON || 2682 !wps->wps->registrar->pbc)) { 2683 wpa_printf(MSG_DEBUG, "WPS: Unsupported Device Password ID %d", 2684 wps->dev_pw_id); 2685 wps->state = SEND_M2D; 2686 return WPS_CONTINUE; 2687 } 2688 2689 #ifdef CONFIG_WPS_NFC 2690 if (wps->dev_pw_id >= 0x10 || 2691 wps->dev_pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) { 2692 struct wps_nfc_pw_token *token; 2693 const u8 *addr[1]; 2694 u8 hash[WPS_HASH_LEN]; 2695 2696 wpa_printf(MSG_DEBUG, "WPS: Searching for NFC token match for id=%d (ctx %p registrar %p)", 2697 wps->dev_pw_id, wps->wps, wps->wps->registrar); 2698 token = wps_get_nfc_pw_token( 2699 &wps->wps->registrar->nfc_pw_tokens, wps->dev_pw_id); 2700 if (token && token->peer_pk_hash_known) { 2701 size_t len; 2702 2703 wpa_printf(MSG_DEBUG, "WPS: Found matching NFC " 2704 "Password Token"); 2705 dl_list_del(&token->list); 2706 wps->nfc_pw_token = token; 2707 2708 addr[0] = attr->public_key; 2709 len = attr->public_key_len; 2710 sha256_vector(1, addr, &len, hash); 2711 if (os_memcmp_const(hash, 2712 wps->nfc_pw_token->pubkey_hash, 2713 WPS_OOB_PUBKEY_HASH_LEN) != 0) { 2714 wpa_printf(MSG_ERROR, "WPS: Public Key hash " 2715 "mismatch"); 2716 wps->state = SEND_M2D; 2717 wps->config_error = 2718 WPS_CFG_PUBLIC_KEY_HASH_MISMATCH; 2719 return WPS_CONTINUE; 2720 } 2721 } else if (token) { 2722 wpa_printf(MSG_DEBUG, "WPS: Found matching NFC " 2723 "Password Token (no peer PK hash)"); 2724 wps->nfc_pw_token = token; 2725 } else if (wps->dev_pw_id >= 0x10 && 2726 wps->wps->ap_nfc_dev_pw_id == wps->dev_pw_id && 2727 wps->wps->ap_nfc_dev_pw) { 2728 wpa_printf(MSG_DEBUG, "WPS: Found match with own NFC Password Token"); 2729 } 2730 } 2731 #endif /* CONFIG_WPS_NFC */ 2732 2733 if (wps->dev_pw_id == DEV_PW_PUSHBUTTON) { 2734 if ((wps->wps->registrar->force_pbc_overlap || 2735 wps_registrar_pbc_overlap(wps->wps->registrar, 2736 wps->mac_addr_e, wps->uuid_e) || 2737 !wps_registrar_p2p_dev_addr_match(wps)) && 2738 !wps_registrar_skip_overlap(wps)) { 2739 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - deny PBC " 2740 "negotiation"); 2741 wps->state = SEND_M2D; 2742 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2743 wps_pbc_overlap_event(wps->wps); 2744 wps_fail_event(wps->wps, WPS_M1, 2745 WPS_CFG_MULTIPLE_PBC_DETECTED, 2746 WPS_EI_NO_ERROR, wps->mac_addr_e); 2747 wps->wps->registrar->force_pbc_overlap = 1; 2748 return WPS_CONTINUE; 2749 } 2750 wps_registrar_add_pbc_session(wps->wps->registrar, 2751 wps->mac_addr_e, wps->uuid_e); 2752 wps->pbc = 1; 2753 } 2754 2755 #ifdef WPS_WORKAROUNDS 2756 /* 2757 * It looks like Mac OS X 10.6.3 and 10.6.4 do not like Network Key in 2758 * passphrase format. To avoid interop issues, force PSK format to be 2759 * used. 2760 */ 2761 if (!wps->use_psk_key && 2762 wps->peer_dev.manufacturer && 2763 os_strncmp(wps->peer_dev.manufacturer, "Apple ", 6) == 0 && 2764 wps->peer_dev.model_name && 2765 os_strcmp(wps->peer_dev.model_name, "AirPort") == 0) { 2766 wpa_printf(MSG_DEBUG, "WPS: Workaround - Force Network Key in " 2767 "PSK format"); 2768 wps->use_psk_key = 1; 2769 } 2770 #endif /* WPS_WORKAROUNDS */ 2771 wps_process_vendor_ext_m1(&wps->peer_dev, attr->multi_ap_ext); 2772 2773 wps->state = SEND_M2; 2774 return WPS_CONTINUE; 2775 } 2776 2777 2778 static enum wps_process_res wps_process_m3(struct wps_data *wps, 2779 const struct wpabuf *msg, 2780 struct wps_parse_attr *attr) 2781 { 2782 wpa_printf(MSG_DEBUG, "WPS: Received M3"); 2783 2784 if (wps->state != RECV_M3) { 2785 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2786 "receiving M3", wps->state); 2787 wps->state = SEND_WSC_NACK; 2788 return WPS_CONTINUE; 2789 } 2790 2791 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2792 !wps_registrar_skip_overlap(wps)) { 2793 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2794 "session overlap"); 2795 wps->state = SEND_WSC_NACK; 2796 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2797 return WPS_CONTINUE; 2798 } 2799 2800 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2801 wps_process_authenticator(wps, attr->authenticator, msg) || 2802 wps_process_e_hash1(wps, attr->e_hash1) || 2803 wps_process_e_hash2(wps, attr->e_hash2)) { 2804 wps->state = SEND_WSC_NACK; 2805 return WPS_CONTINUE; 2806 } 2807 2808 wps->state = SEND_M4; 2809 return WPS_CONTINUE; 2810 } 2811 2812 2813 static enum wps_process_res wps_process_m5(struct wps_data *wps, 2814 const struct wpabuf *msg, 2815 struct wps_parse_attr *attr) 2816 { 2817 struct wpabuf *decrypted; 2818 struct wps_parse_attr eattr; 2819 2820 wpa_printf(MSG_DEBUG, "WPS: Received M5"); 2821 2822 if (wps->state != RECV_M5) { 2823 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2824 "receiving M5", wps->state); 2825 wps->state = SEND_WSC_NACK; 2826 return WPS_CONTINUE; 2827 } 2828 2829 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2830 !wps_registrar_skip_overlap(wps)) { 2831 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2832 "session overlap"); 2833 wps->state = SEND_WSC_NACK; 2834 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2835 return WPS_CONTINUE; 2836 } 2837 2838 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2839 wps_process_authenticator(wps, attr->authenticator, msg)) { 2840 wps->state = SEND_WSC_NACK; 2841 return WPS_CONTINUE; 2842 } 2843 2844 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings, 2845 attr->encr_settings_len); 2846 if (decrypted == NULL) { 2847 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted " 2848 "Settings attribute"); 2849 wps->state = SEND_WSC_NACK; 2850 return WPS_CONTINUE; 2851 } 2852 2853 if (wps_validate_m5_encr(decrypted, attr->version2 != NULL) < 0) { 2854 wpabuf_clear_free(decrypted); 2855 wps->state = SEND_WSC_NACK; 2856 return WPS_CONTINUE; 2857 } 2858 2859 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings " 2860 "attribute"); 2861 if (wps_parse_msg(decrypted, &eattr) < 0 || 2862 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) || 2863 wps_process_e_snonce1(wps, eattr.e_snonce1)) { 2864 wpabuf_clear_free(decrypted); 2865 wps->state = SEND_WSC_NACK; 2866 return WPS_CONTINUE; 2867 } 2868 wpabuf_clear_free(decrypted); 2869 2870 wps->state = SEND_M6; 2871 return WPS_CONTINUE; 2872 } 2873 2874 2875 static void wps_sta_cred_cb(struct wps_data *wps) 2876 { 2877 /* 2878 * Update credential to only include a single authentication and 2879 * encryption type in case the AP configuration includes more than one 2880 * option. 2881 */ 2882 if (wps->cred.auth_type & WPS_AUTH_WPA2PSK) 2883 wps->cred.auth_type = WPS_AUTH_WPA2PSK; 2884 else if (wps->cred.auth_type & WPS_AUTH_WPAPSK) 2885 wps->cred.auth_type = WPS_AUTH_WPAPSK; 2886 if (wps->cred.encr_type & WPS_ENCR_AES) 2887 wps->cred.encr_type = WPS_ENCR_AES; 2888 else if (wps->cred.encr_type & WPS_ENCR_TKIP) 2889 wps->cred.encr_type = WPS_ENCR_TKIP; 2890 wpa_printf(MSG_DEBUG, "WPS: Update local configuration based on the " 2891 "AP configuration"); 2892 if (wps->wps->cred_cb) 2893 wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred); 2894 } 2895 2896 2897 static void wps_cred_update(struct wps_credential *dst, 2898 struct wps_credential *src) 2899 { 2900 os_memcpy(dst->ssid, src->ssid, sizeof(dst->ssid)); 2901 dst->ssid_len = src->ssid_len; 2902 dst->auth_type = src->auth_type; 2903 dst->encr_type = src->encr_type; 2904 dst->key_idx = src->key_idx; 2905 os_memcpy(dst->key, src->key, sizeof(dst->key)); 2906 dst->key_len = src->key_len; 2907 } 2908 2909 2910 static int wps_process_ap_settings_r(struct wps_data *wps, 2911 struct wps_parse_attr *attr) 2912 { 2913 struct wpabuf *msg; 2914 2915 if (wps->wps->ap || wps->er) 2916 return 0; 2917 2918 /* AP Settings Attributes in M7 when Enrollee is an AP */ 2919 if (wps_process_ap_settings(attr, &wps->cred) < 0) 2920 return -1; 2921 2922 wpa_printf(MSG_INFO, "WPS: Received old AP configuration from AP"); 2923 2924 if (wps->new_ap_settings) { 2925 wpa_printf(MSG_INFO, "WPS: Update AP configuration based on " 2926 "new settings"); 2927 wps_cred_update(&wps->cred, wps->new_ap_settings); 2928 return 0; 2929 } else { 2930 /* 2931 * Use the AP PIN only to receive the current AP settings, not 2932 * to reconfigure the AP. 2933 */ 2934 2935 /* 2936 * Clear selected registrar here since we do not get to 2937 * WSC_Done in this protocol run. 2938 */ 2939 wps_registrar_pin_completed(wps->wps->registrar); 2940 2941 msg = wps_build_ap_cred(wps); 2942 if (msg == NULL) 2943 return -1; 2944 wps->cred.cred_attr = wpabuf_head(msg); 2945 wps->cred.cred_attr_len = wpabuf_len(msg); 2946 2947 if (wps->ap_settings_cb) { 2948 wps->ap_settings_cb(wps->ap_settings_cb_ctx, 2949 &wps->cred); 2950 wpabuf_free(msg); 2951 return 1; 2952 } 2953 wps_sta_cred_cb(wps); 2954 2955 wps->cred.cred_attr = NULL; 2956 wps->cred.cred_attr_len = 0; 2957 wpabuf_free(msg); 2958 2959 return 1; 2960 } 2961 } 2962 2963 2964 static enum wps_process_res wps_process_m7(struct wps_data *wps, 2965 const struct wpabuf *msg, 2966 struct wps_parse_attr *attr) 2967 { 2968 struct wpabuf *decrypted; 2969 struct wps_parse_attr eattr; 2970 2971 wpa_printf(MSG_DEBUG, "WPS: Received M7"); 2972 2973 if (wps->state != RECV_M7) { 2974 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2975 "receiving M7", wps->state); 2976 wps->state = SEND_WSC_NACK; 2977 return WPS_CONTINUE; 2978 } 2979 2980 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2981 !wps_registrar_skip_overlap(wps)) { 2982 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2983 "session overlap"); 2984 wps->state = SEND_WSC_NACK; 2985 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2986 return WPS_CONTINUE; 2987 } 2988 2989 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2990 wps_process_authenticator(wps, attr->authenticator, msg)) { 2991 wps->state = SEND_WSC_NACK; 2992 return WPS_CONTINUE; 2993 } 2994 2995 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings, 2996 attr->encr_settings_len); 2997 if (decrypted == NULL) { 2998 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypt Encrypted " 2999 "Settings attribute"); 3000 wps->state = SEND_WSC_NACK; 3001 return WPS_CONTINUE; 3002 } 3003 3004 if (wps_validate_m7_encr(decrypted, wps->wps->ap || wps->er, 3005 attr->version2 != NULL) < 0) { 3006 wpabuf_clear_free(decrypted); 3007 wps->state = SEND_WSC_NACK; 3008 return WPS_CONTINUE; 3009 } 3010 3011 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings " 3012 "attribute"); 3013 if (wps_parse_msg(decrypted, &eattr) < 0 || 3014 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) || 3015 wps_process_e_snonce2(wps, eattr.e_snonce2) || 3016 wps_process_ap_settings_r(wps, &eattr)) { 3017 wpabuf_clear_free(decrypted); 3018 wps->state = SEND_WSC_NACK; 3019 return WPS_CONTINUE; 3020 } 3021 3022 wpabuf_clear_free(decrypted); 3023 3024 wps->state = SEND_M8; 3025 return WPS_CONTINUE; 3026 } 3027 3028 3029 static enum wps_process_res wps_process_wsc_msg(struct wps_data *wps, 3030 const struct wpabuf *msg) 3031 { 3032 struct wps_parse_attr attr; 3033 enum wps_process_res ret = WPS_CONTINUE; 3034 3035 wpa_printf(MSG_DEBUG, "WPS: Received WSC_MSG"); 3036 3037 if (wps_parse_msg(msg, &attr) < 0) 3038 return WPS_FAILURE; 3039 3040 if (attr.msg_type == NULL) { 3041 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3042 wps->state = SEND_WSC_NACK; 3043 return WPS_CONTINUE; 3044 } 3045 3046 if (*attr.msg_type != WPS_M1 && 3047 (attr.registrar_nonce == NULL || 3048 os_memcmp(wps->nonce_r, attr.registrar_nonce, 3049 WPS_NONCE_LEN) != 0)) { 3050 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3051 return WPS_FAILURE; 3052 } 3053 3054 switch (*attr.msg_type) { 3055 case WPS_M1: 3056 if (wps_validate_m1(msg) < 0) 3057 return WPS_FAILURE; 3058 #ifdef CONFIG_WPS_UPNP 3059 if (wps->wps->wps_upnp && attr.mac_addr) { 3060 /* Remove old pending messages when starting new run */ 3061 wps_free_pending_msgs(wps->wps->upnp_msgs); 3062 wps->wps->upnp_msgs = NULL; 3063 3064 upnp_wps_device_send_wlan_event( 3065 wps->wps->wps_upnp, attr.mac_addr, 3066 UPNP_WPS_WLANEVENT_TYPE_EAP, msg); 3067 } 3068 #endif /* CONFIG_WPS_UPNP */ 3069 ret = wps_process_m1(wps, &attr); 3070 break; 3071 case WPS_M3: 3072 if (wps_validate_m3(msg) < 0) 3073 return WPS_FAILURE; 3074 ret = wps_process_m3(wps, msg, &attr); 3075 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 3076 wps_fail_event(wps->wps, WPS_M3, wps->config_error, 3077 wps->error_indication, wps->mac_addr_e); 3078 break; 3079 case WPS_M5: 3080 if (wps_validate_m5(msg) < 0) 3081 return WPS_FAILURE; 3082 ret = wps_process_m5(wps, msg, &attr); 3083 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 3084 wps_fail_event(wps->wps, WPS_M5, wps->config_error, 3085 wps->error_indication, wps->mac_addr_e); 3086 break; 3087 case WPS_M7: 3088 if (wps_validate_m7(msg) < 0) 3089 return WPS_FAILURE; 3090 ret = wps_process_m7(wps, msg, &attr); 3091 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 3092 wps_fail_event(wps->wps, WPS_M7, wps->config_error, 3093 wps->error_indication, wps->mac_addr_e); 3094 break; 3095 default: 3096 wpa_printf(MSG_DEBUG, "WPS: Unsupported Message Type %d", 3097 *attr.msg_type); 3098 return WPS_FAILURE; 3099 } 3100 3101 if (ret == WPS_CONTINUE) { 3102 /* Save a copy of the last message for Authenticator derivation 3103 */ 3104 wpabuf_free(wps->last_msg); 3105 wps->last_msg = wpabuf_dup(msg); 3106 } 3107 3108 return ret; 3109 } 3110 3111 3112 static enum wps_process_res wps_process_wsc_ack(struct wps_data *wps, 3113 const struct wpabuf *msg) 3114 { 3115 struct wps_parse_attr attr; 3116 3117 wpa_printf(MSG_DEBUG, "WPS: Received WSC_ACK"); 3118 3119 if (wps_parse_msg(msg, &attr) < 0) 3120 return WPS_FAILURE; 3121 3122 if (attr.msg_type == NULL) { 3123 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3124 return WPS_FAILURE; 3125 } 3126 3127 if (*attr.msg_type != WPS_WSC_ACK) { 3128 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 3129 *attr.msg_type); 3130 return WPS_FAILURE; 3131 } 3132 3133 #ifdef CONFIG_WPS_UPNP 3134 if (wps->wps->wps_upnp && wps->ext_reg && wps->state == RECV_M2D_ACK && 3135 upnp_wps_subscribers(wps->wps->wps_upnp)) { 3136 if (wps->wps->upnp_msgs) 3137 return WPS_CONTINUE; 3138 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an " 3139 "external Registrar"); 3140 return WPS_PENDING; 3141 } 3142 #endif /* CONFIG_WPS_UPNP */ 3143 3144 if (attr.registrar_nonce == NULL || 3145 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 3146 { 3147 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3148 return WPS_FAILURE; 3149 } 3150 3151 if (attr.enrollee_nonce == NULL || 3152 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 3153 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 3154 return WPS_FAILURE; 3155 } 3156 3157 if (wps->state == RECV_M2D_ACK) { 3158 #ifdef CONFIG_WPS_UPNP 3159 if (wps->wps->wps_upnp && 3160 upnp_wps_subscribers(wps->wps->wps_upnp)) { 3161 if (wps->wps->upnp_msgs) 3162 return WPS_CONTINUE; 3163 if (wps->ext_reg == 0) 3164 wps->ext_reg = 1; 3165 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an " 3166 "external Registrar"); 3167 return WPS_PENDING; 3168 } 3169 #endif /* CONFIG_WPS_UPNP */ 3170 3171 wpa_printf(MSG_DEBUG, "WPS: No more registrars available - " 3172 "terminate negotiation"); 3173 } 3174 3175 return WPS_FAILURE; 3176 } 3177 3178 3179 static enum wps_process_res wps_process_wsc_nack(struct wps_data *wps, 3180 const struct wpabuf *msg) 3181 { 3182 struct wps_parse_attr attr; 3183 int old_state; 3184 u16 config_error; 3185 3186 wpa_printf(MSG_DEBUG, "WPS: Received WSC_NACK"); 3187 3188 old_state = wps->state; 3189 wps->state = SEND_WSC_NACK; 3190 3191 if (wps_parse_msg(msg, &attr) < 0) 3192 return WPS_FAILURE; 3193 3194 if (attr.msg_type == NULL) { 3195 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3196 return WPS_FAILURE; 3197 } 3198 3199 if (*attr.msg_type != WPS_WSC_NACK) { 3200 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 3201 *attr.msg_type); 3202 return WPS_FAILURE; 3203 } 3204 3205 #ifdef CONFIG_WPS_UPNP 3206 if (wps->wps->wps_upnp && wps->ext_reg) { 3207 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external " 3208 "Registrar terminated by the Enrollee"); 3209 return WPS_FAILURE; 3210 } 3211 #endif /* CONFIG_WPS_UPNP */ 3212 3213 if (attr.registrar_nonce == NULL || 3214 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 3215 { 3216 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3217 return WPS_FAILURE; 3218 } 3219 3220 if (attr.enrollee_nonce == NULL || 3221 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 3222 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 3223 return WPS_FAILURE; 3224 } 3225 3226 if (attr.config_error == NULL) { 3227 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error attribute " 3228 "in WSC_NACK"); 3229 return WPS_FAILURE; 3230 } 3231 3232 config_error = WPA_GET_BE16(attr.config_error); 3233 wpa_printf(MSG_DEBUG, "WPS: Enrollee terminated negotiation with " 3234 "Configuration Error %d", config_error); 3235 3236 switch (old_state) { 3237 case RECV_M3: 3238 wps_fail_event(wps->wps, WPS_M2, config_error, 3239 wps->error_indication, wps->mac_addr_e); 3240 break; 3241 case RECV_M5: 3242 wps_fail_event(wps->wps, WPS_M4, config_error, 3243 wps->error_indication, wps->mac_addr_e); 3244 break; 3245 case RECV_M7: 3246 wps_fail_event(wps->wps, WPS_M6, config_error, 3247 wps->error_indication, wps->mac_addr_e); 3248 break; 3249 case RECV_DONE: 3250 wps_fail_event(wps->wps, WPS_M8, config_error, 3251 wps->error_indication, wps->mac_addr_e); 3252 break; 3253 default: 3254 break; 3255 } 3256 3257 return WPS_FAILURE; 3258 } 3259 3260 3261 static enum wps_process_res wps_process_wsc_done(struct wps_data *wps, 3262 const struct wpabuf *msg) 3263 { 3264 struct wps_parse_attr attr; 3265 3266 wpa_printf(MSG_DEBUG, "WPS: Received WSC_Done"); 3267 3268 if (wps->state != RECV_DONE && 3269 (!wps->wps->wps_upnp || !wps->ext_reg)) { 3270 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 3271 "receiving WSC_Done", wps->state); 3272 return WPS_FAILURE; 3273 } 3274 3275 if (wps_parse_msg(msg, &attr) < 0) 3276 return WPS_FAILURE; 3277 3278 if (attr.msg_type == NULL) { 3279 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3280 return WPS_FAILURE; 3281 } 3282 3283 if (*attr.msg_type != WPS_WSC_DONE) { 3284 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 3285 *attr.msg_type); 3286 return WPS_FAILURE; 3287 } 3288 3289 #ifdef CONFIG_WPS_UPNP 3290 if (wps->wps->wps_upnp && wps->ext_reg) { 3291 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external " 3292 "Registrar completed successfully"); 3293 wps_device_store(wps->wps->registrar, &wps->peer_dev, 3294 wps->uuid_e); 3295 return WPS_DONE; 3296 } 3297 #endif /* CONFIG_WPS_UPNP */ 3298 3299 if (attr.registrar_nonce == NULL || 3300 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 3301 { 3302 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3303 return WPS_FAILURE; 3304 } 3305 3306 if (attr.enrollee_nonce == NULL || 3307 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 3308 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 3309 return WPS_FAILURE; 3310 } 3311 3312 wpa_printf(MSG_DEBUG, "WPS: Negotiation completed successfully"); 3313 wps_device_store(wps->wps->registrar, &wps->peer_dev, 3314 wps->uuid_e); 3315 3316 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->new_psk && 3317 wps->wps->ap && !wps->wps->registrar->disable_auto_conf) { 3318 struct wps_credential cred; 3319 3320 wpa_printf(MSG_DEBUG, "WPS: Moving to Configured state based " 3321 "on first Enrollee connection"); 3322 3323 os_memset(&cred, 0, sizeof(cred)); 3324 os_memcpy(cred.ssid, wps->wps->ssid, wps->wps->ssid_len); 3325 cred.ssid_len = wps->wps->ssid_len; 3326 if (wps->wps->rf_band_cb(wps->wps->cb_ctx) == WPS_RF_60GHZ) { 3327 cred.auth_type = WPS_AUTH_WPA2PSK; 3328 cred.encr_type = WPS_ENCR_AES; 3329 } else { 3330 cred.auth_type = WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK; 3331 cred.encr_type = WPS_ENCR_TKIP | WPS_ENCR_AES; 3332 } 3333 os_memcpy(cred.key, wps->new_psk, wps->new_psk_len); 3334 cred.key_len = wps->new_psk_len; 3335 3336 wps->wps->wps_state = WPS_STATE_CONFIGURED; 3337 wpa_hexdump_ascii_key(MSG_DEBUG, 3338 "WPS: Generated random passphrase", 3339 wps->new_psk, wps->new_psk_len); 3340 if (wps->wps->cred_cb) 3341 wps->wps->cred_cb(wps->wps->cb_ctx, &cred); 3342 3343 os_free(wps->new_psk); 3344 wps->new_psk = NULL; 3345 } 3346 3347 if (!wps->wps->ap && !wps->er) 3348 wps_sta_cred_cb(wps); 3349 3350 if (wps->new_psk) { 3351 if (wps_cb_new_psk(wps->wps->registrar, wps->mac_addr_e, 3352 wps->p2p_dev_addr, wps->new_psk, 3353 wps->new_psk_len)) { 3354 wpa_printf(MSG_DEBUG, "WPS: Failed to configure the " 3355 "new PSK"); 3356 } 3357 os_free(wps->new_psk); 3358 wps->new_psk = NULL; 3359 } 3360 3361 wps_cb_reg_success(wps->wps->registrar, wps->mac_addr_e, wps->uuid_e, 3362 wps->dev_password, wps->dev_password_len); 3363 3364 if (wps->pbc) { 3365 wps_registrar_remove_pbc_session(wps->wps->registrar, 3366 wps->uuid_e, 3367 wps->p2p_dev_addr); 3368 wps_registrar_pbc_completed(wps->wps->registrar); 3369 #ifdef WPS_WORKAROUNDS 3370 os_get_reltime(&wps->wps->registrar->pbc_ignore_start); 3371 #endif /* WPS_WORKAROUNDS */ 3372 os_memcpy(wps->wps->registrar->pbc_ignore_uuid, wps->uuid_e, 3373 WPS_UUID_LEN); 3374 } else { 3375 wps_registrar_pin_completed(wps->wps->registrar); 3376 } 3377 /* TODO: maintain AuthorizedMACs somewhere separately for each ER and 3378 * merge them into APs own list.. */ 3379 3380 wps_success_event(wps->wps, wps->mac_addr_e); 3381 3382 return WPS_DONE; 3383 } 3384 3385 3386 enum wps_process_res wps_registrar_process_msg(struct wps_data *wps, 3387 enum wsc_op_code op_code, 3388 const struct wpabuf *msg) 3389 { 3390 enum wps_process_res ret; 3391 3392 wpa_printf(MSG_DEBUG, "WPS: Processing received message (len=%lu " 3393 "op_code=%d)", 3394 (unsigned long) wpabuf_len(msg), op_code); 3395 3396 #ifdef CONFIG_WPS_UPNP 3397 if (wps->wps->wps_upnp && op_code == WSC_MSG && wps->ext_reg == 1) { 3398 struct wps_parse_attr attr; 3399 if (wps_parse_msg(msg, &attr) == 0 && attr.msg_type && 3400 *attr.msg_type == WPS_M3) 3401 wps->ext_reg = 2; /* past M2/M2D phase */ 3402 } 3403 if (wps->ext_reg > 1) 3404 wps_registrar_free_pending_m2(wps->wps); 3405 if (wps->wps->wps_upnp && wps->ext_reg && 3406 wps->wps->upnp_msgs == NULL && 3407 (op_code == WSC_MSG || op_code == WSC_Done || op_code == WSC_NACK)) 3408 { 3409 struct wps_parse_attr attr; 3410 int type; 3411 if (wps_parse_msg(msg, &attr) < 0 || attr.msg_type == NULL) 3412 type = -1; 3413 else 3414 type = *attr.msg_type; 3415 wpa_printf(MSG_DEBUG, "WPS: Sending received message (type %d)" 3416 " to external Registrar for processing", type); 3417 upnp_wps_device_send_wlan_event(wps->wps->wps_upnp, 3418 wps->mac_addr_e, 3419 UPNP_WPS_WLANEVENT_TYPE_EAP, 3420 msg); 3421 if (op_code == WSC_MSG) 3422 return WPS_PENDING; 3423 } else if (wps->wps->wps_upnp && wps->ext_reg && op_code == WSC_MSG) { 3424 wpa_printf(MSG_DEBUG, "WPS: Skip internal processing - using " 3425 "external Registrar"); 3426 return WPS_CONTINUE; 3427 } 3428 #endif /* CONFIG_WPS_UPNP */ 3429 3430 switch (op_code) { 3431 case WSC_MSG: 3432 return wps_process_wsc_msg(wps, msg); 3433 case WSC_ACK: 3434 if (wps_validate_wsc_ack(msg) < 0) 3435 return WPS_FAILURE; 3436 return wps_process_wsc_ack(wps, msg); 3437 case WSC_NACK: 3438 if (wps_validate_wsc_nack(msg) < 0) 3439 return WPS_FAILURE; 3440 return wps_process_wsc_nack(wps, msg); 3441 case WSC_Done: 3442 if (wps_validate_wsc_done(msg) < 0) 3443 return WPS_FAILURE; 3444 ret = wps_process_wsc_done(wps, msg); 3445 if (ret == WPS_FAILURE) { 3446 wps->state = SEND_WSC_NACK; 3447 wps_fail_event(wps->wps, WPS_WSC_DONE, 3448 wps->config_error, 3449 wps->error_indication, wps->mac_addr_e); 3450 } 3451 return ret; 3452 default: 3453 wpa_printf(MSG_DEBUG, "WPS: Unsupported op_code %d", op_code); 3454 return WPS_FAILURE; 3455 } 3456 } 3457 3458 3459 int wps_registrar_update_ie(struct wps_registrar *reg) 3460 { 3461 return wps_set_ie(reg); 3462 } 3463 3464 3465 static void wps_registrar_set_selected_timeout(void *eloop_ctx, 3466 void *timeout_ctx) 3467 { 3468 struct wps_registrar *reg = eloop_ctx; 3469 3470 wpa_printf(MSG_DEBUG, "WPS: Selected Registrar timeout - " 3471 "unselect internal Registrar"); 3472 reg->selected_registrar = 0; 3473 reg->pbc = 0; 3474 wps_registrar_expire_pins(reg); 3475 wps_registrar_selected_registrar_changed(reg, 0); 3476 } 3477 3478 3479 #ifdef CONFIG_WPS_UPNP 3480 static void wps_registrar_sel_reg_add(struct wps_registrar *reg, 3481 struct subscription *s) 3482 { 3483 int i, j; 3484 wpa_printf(MSG_DEBUG, "WPS: External Registrar selected (dev_pw_id=%d " 3485 "config_methods=0x%x)", 3486 s->dev_password_id, s->config_methods); 3487 reg->sel_reg_union = 1; 3488 if (reg->sel_reg_dev_password_id_override != DEV_PW_PUSHBUTTON) 3489 reg->sel_reg_dev_password_id_override = s->dev_password_id; 3490 if (reg->sel_reg_config_methods_override == -1) 3491 reg->sel_reg_config_methods_override = 0; 3492 reg->sel_reg_config_methods_override |= s->config_methods; 3493 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) 3494 if (is_zero_ether_addr(reg->authorized_macs_union[i])) 3495 break; 3496 for (j = 0; i < WPS_MAX_AUTHORIZED_MACS && j < WPS_MAX_AUTHORIZED_MACS; 3497 j++) { 3498 if (is_zero_ether_addr(s->authorized_macs[j])) 3499 break; 3500 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC into union: " 3501 MACSTR, MAC2STR(s->authorized_macs[j])); 3502 os_memcpy(reg->authorized_macs_union[i], 3503 s->authorized_macs[j], ETH_ALEN); 3504 i++; 3505 } 3506 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union", 3507 (u8 *) reg->authorized_macs_union, 3508 sizeof(reg->authorized_macs_union)); 3509 } 3510 #endif /* CONFIG_WPS_UPNP */ 3511 3512 3513 static void wps_registrar_sel_reg_union(struct wps_registrar *reg) 3514 { 3515 #ifdef CONFIG_WPS_UPNP 3516 struct subscription *s; 3517 3518 if (reg->wps->wps_upnp == NULL) 3519 return; 3520 3521 dl_list_for_each(s, ®->wps->wps_upnp->subscriptions, 3522 struct subscription, list) { 3523 struct subscr_addr *sa; 3524 sa = dl_list_first(&s->addr_list, struct subscr_addr, list); 3525 if (sa) { 3526 wpa_printf(MSG_DEBUG, "WPS: External Registrar %s:%d", 3527 inet_ntoa(sa->saddr.sin_addr), 3528 ntohs(sa->saddr.sin_port)); 3529 } 3530 if (s->selected_registrar) 3531 wps_registrar_sel_reg_add(reg, s); 3532 else 3533 wpa_printf(MSG_DEBUG, "WPS: External Registrar not " 3534 "selected"); 3535 } 3536 #endif /* CONFIG_WPS_UPNP */ 3537 } 3538 3539 3540 /** 3541 * wps_registrar_selected_registrar_changed - SetSelectedRegistrar change 3542 * @reg: Registrar data from wps_registrar_init() 3543 * 3544 * This function is called when selected registrar state changes, e.g., when an 3545 * AP receives a SetSelectedRegistrar UPnP message. 3546 */ 3547 void wps_registrar_selected_registrar_changed(struct wps_registrar *reg, 3548 u16 dev_pw_id) 3549 { 3550 wpa_printf(MSG_DEBUG, "WPS: Selected registrar information changed"); 3551 3552 reg->sel_reg_union = reg->selected_registrar; 3553 reg->sel_reg_dev_password_id_override = -1; 3554 reg->sel_reg_config_methods_override = -1; 3555 os_memcpy(reg->authorized_macs_union, reg->authorized_macs, 3556 WPS_MAX_AUTHORIZED_MACS * ETH_ALEN); 3557 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union (start with own)", 3558 (u8 *) reg->authorized_macs_union, 3559 sizeof(reg->authorized_macs_union)); 3560 if (reg->selected_registrar) { 3561 u16 methods; 3562 3563 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 3564 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 3565 WPS_CONFIG_PHY_PUSHBUTTON); 3566 if (reg->pbc) { 3567 reg->sel_reg_dev_password_id_override = 3568 DEV_PW_PUSHBUTTON; 3569 wps_set_pushbutton(&methods, reg->wps->config_methods); 3570 } else if (dev_pw_id) 3571 reg->sel_reg_dev_password_id_override = dev_pw_id; 3572 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar selected " 3573 "(pbc=%d)", reg->pbc); 3574 reg->sel_reg_config_methods_override = methods; 3575 } else 3576 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar not selected"); 3577 3578 wps_registrar_sel_reg_union(reg); 3579 3580 wps_set_ie(reg); 3581 wps_cb_set_sel_reg(reg); 3582 } 3583 3584 3585 int wps_registrar_get_info(struct wps_registrar *reg, const u8 *addr, 3586 char *buf, size_t buflen) 3587 { 3588 struct wps_registrar_device *d; 3589 int len = 0, ret; 3590 char uuid[40]; 3591 char devtype[WPS_DEV_TYPE_BUFSIZE]; 3592 3593 d = wps_device_get(reg, addr); 3594 if (d == NULL) 3595 return 0; 3596 if (uuid_bin2str(d->uuid, uuid, sizeof(uuid))) 3597 return 0; 3598 3599 ret = os_snprintf(buf + len, buflen - len, 3600 "wpsUuid=%s\n" 3601 "wpsPrimaryDeviceType=%s\n" 3602 "wpsDeviceName=%s\n" 3603 "wpsManufacturer=%s\n" 3604 "wpsModelName=%s\n" 3605 "wpsModelNumber=%s\n" 3606 "wpsSerialNumber=%s\n", 3607 uuid, 3608 wps_dev_type_bin2str(d->dev.pri_dev_type, devtype, 3609 sizeof(devtype)), 3610 d->dev.device_name ? d->dev.device_name : "", 3611 d->dev.manufacturer ? d->dev.manufacturer : "", 3612 d->dev.model_name ? d->dev.model_name : "", 3613 d->dev.model_number ? d->dev.model_number : "", 3614 d->dev.serial_number ? d->dev.serial_number : ""); 3615 if (os_snprintf_error(buflen - len, ret)) 3616 return len; 3617 len += ret; 3618 3619 return len; 3620 } 3621 3622 3623 int wps_registrar_config_ap(struct wps_registrar *reg, 3624 struct wps_credential *cred) 3625 { 3626 wpa_printf(MSG_DEBUG, "WPS: encr_type=0x%x", cred->encr_type); 3627 if (!(cred->encr_type & (WPS_ENCR_NONE | WPS_ENCR_TKIP | 3628 WPS_ENCR_AES))) { 3629 if (cred->encr_type & WPS_ENCR_WEP) { 3630 wpa_printf(MSG_INFO, "WPS: Reject new AP settings " 3631 "due to WEP configuration"); 3632 return -1; 3633 } 3634 3635 wpa_printf(MSG_INFO, "WPS: Reject new AP settings due to " 3636 "invalid encr_type 0x%x", cred->encr_type); 3637 return -1; 3638 } 3639 3640 if ((cred->encr_type & (WPS_ENCR_TKIP | WPS_ENCR_AES)) == 3641 WPS_ENCR_TKIP) { 3642 wpa_printf(MSG_DEBUG, "WPS: Upgrade encr_type TKIP -> " 3643 "TKIP+AES"); 3644 cred->encr_type |= WPS_ENCR_AES; 3645 } 3646 3647 if ((cred->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) == 3648 WPS_AUTH_WPAPSK) { 3649 wpa_printf(MSG_DEBUG, "WPS: Upgrade auth_type WPAPSK -> " 3650 "WPAPSK+WPA2PSK"); 3651 cred->auth_type |= WPS_AUTH_WPA2PSK; 3652 } 3653 3654 if (reg->wps->cred_cb) 3655 return reg->wps->cred_cb(reg->wps->cb_ctx, cred); 3656 3657 return -1; 3658 } 3659 3660 3661 int wps_registrar_update_multi_ap(struct wps_registrar *reg, 3662 const u8 *multi_ap_backhaul_ssid, 3663 size_t multi_ap_backhaul_ssid_len, 3664 const u8 *multi_ap_backhaul_network_key, 3665 size_t multi_ap_backhaul_network_key_len) 3666 { 3667 if (multi_ap_backhaul_ssid) { 3668 os_memcpy(reg->multi_ap_backhaul_ssid, 3669 multi_ap_backhaul_ssid, multi_ap_backhaul_ssid_len); 3670 reg->multi_ap_backhaul_ssid_len = multi_ap_backhaul_ssid_len; 3671 } 3672 3673 os_free(reg->multi_ap_backhaul_network_key); 3674 reg->multi_ap_backhaul_network_key = NULL; 3675 reg->multi_ap_backhaul_network_key_len = 0; 3676 if (multi_ap_backhaul_network_key) { 3677 reg->multi_ap_backhaul_network_key = 3678 os_memdup(multi_ap_backhaul_network_key, 3679 multi_ap_backhaul_network_key_len); 3680 if (!reg->multi_ap_backhaul_network_key) 3681 return -1; 3682 reg->multi_ap_backhaul_network_key_len = 3683 multi_ap_backhaul_network_key_len; 3684 } 3685 3686 return 0; 3687 } 3688 3689 3690 #ifdef CONFIG_WPS_NFC 3691 3692 int wps_registrar_add_nfc_pw_token(struct wps_registrar *reg, 3693 const u8 *pubkey_hash, u16 pw_id, 3694 const u8 *dev_pw, size_t dev_pw_len, 3695 int pk_hash_provided_oob) 3696 { 3697 struct wps_nfc_pw_token *token; 3698 3699 if (dev_pw_len > WPS_OOB_DEVICE_PASSWORD_LEN) 3700 return -1; 3701 3702 if (pw_id == DEV_PW_NFC_CONNECTION_HANDOVER && 3703 (pubkey_hash == NULL || !pk_hash_provided_oob)) { 3704 wpa_printf(MSG_DEBUG, "WPS: Unexpected NFC Password Token " 3705 "addition - missing public key hash"); 3706 return -1; 3707 } 3708 3709 wps_free_nfc_pw_tokens(®->nfc_pw_tokens, pw_id); 3710 3711 token = os_zalloc(sizeof(*token)); 3712 if (token == NULL) 3713 return -1; 3714 3715 token->peer_pk_hash_known = pubkey_hash != NULL; 3716 if (pubkey_hash) 3717 os_memcpy(token->pubkey_hash, pubkey_hash, 3718 WPS_OOB_PUBKEY_HASH_LEN); 3719 token->pw_id = pw_id; 3720 token->pk_hash_provided_oob = pk_hash_provided_oob; 3721 if (dev_pw) { 3722 wpa_snprintf_hex_uppercase((char *) token->dev_pw, 3723 sizeof(token->dev_pw), 3724 dev_pw, dev_pw_len); 3725 token->dev_pw_len = dev_pw_len * 2; 3726 } 3727 3728 dl_list_add(®->nfc_pw_tokens, &token->list); 3729 3730 reg->selected_registrar = 1; 3731 reg->pbc = 0; 3732 wps_registrar_add_authorized_mac(reg, 3733 (u8 *) "\xff\xff\xff\xff\xff\xff"); 3734 wps_registrar_selected_registrar_changed(reg, pw_id); 3735 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 3736 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, 3737 wps_registrar_set_selected_timeout, 3738 reg, NULL); 3739 3740 wpa_printf(MSG_DEBUG, "WPS: Added NFC Device Password %u to Registrar", 3741 pw_id); 3742 3743 return 0; 3744 } 3745 3746 3747 int wps_registrar_add_nfc_password_token(struct wps_registrar *reg, 3748 const u8 *oob_dev_pw, 3749 size_t oob_dev_pw_len) 3750 { 3751 const u8 *pos, *hash, *dev_pw; 3752 u16 id; 3753 size_t dev_pw_len; 3754 3755 if (oob_dev_pw_len < WPS_OOB_PUBKEY_HASH_LEN + 2 || 3756 oob_dev_pw_len > WPS_OOB_PUBKEY_HASH_LEN + 2 + 3757 WPS_OOB_DEVICE_PASSWORD_LEN) 3758 return -1; 3759 3760 hash = oob_dev_pw; 3761 pos = oob_dev_pw + WPS_OOB_PUBKEY_HASH_LEN; 3762 id = WPA_GET_BE16(pos); 3763 dev_pw = pos + 2; 3764 dev_pw_len = oob_dev_pw + oob_dev_pw_len - dev_pw; 3765 3766 wpa_printf(MSG_DEBUG, "WPS: Add NFC Password Token for Password ID %u", 3767 id); 3768 3769 wpa_hexdump(MSG_DEBUG, "WPS: Public Key Hash", 3770 hash, WPS_OOB_PUBKEY_HASH_LEN); 3771 wpa_hexdump_key(MSG_DEBUG, "WPS: Device Password", dev_pw, dev_pw_len); 3772 3773 return wps_registrar_add_nfc_pw_token(reg, hash, id, dev_pw, 3774 dev_pw_len, 0); 3775 } 3776 3777 3778 void wps_registrar_remove_nfc_pw_token(struct wps_registrar *reg, 3779 struct wps_nfc_pw_token *token) 3780 { 3781 wps_registrar_remove_authorized_mac(reg, 3782 (u8 *) "\xff\xff\xff\xff\xff\xff"); 3783 wps_registrar_selected_registrar_changed(reg, 0); 3784 3785 /* 3786 * Free the NFC password token if it was used only for a single protocol 3787 * run. The static handover case uses the same password token multiple 3788 * times, so do not free that case here. 3789 */ 3790 if (token->peer_pk_hash_known) 3791 os_free(token); 3792 } 3793 3794 #endif /* CONFIG_WPS_NFC */ 3795
Indexes created Fri Jun 26 00:24:39 UTC 2026