1 /* 2 * Wi-Fi Protected Setup - Registrar 3 * Copyright (c) 2008-2016, Jouni Malinen <j@w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9 #include "utils/includes.h" 10 11 #include "utils/common.h" 12 #include "utils/base64.h" 13 #include "utils/eloop.h" 14 #include "utils/uuid.h" 15 #include "utils/list.h" 16 #include "crypto/crypto.h" 17 #include "crypto/sha256.h" 18 #include "crypto/random.h" 19 #include "common/ieee802_11_defs.h" 20 #include "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 (os_memcmp(reg->authorized_macs[i], addr, ETH_ALEN) == 0) { 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 (os_memcmp(reg->authorized_macs, addr, ETH_ALEN) == 0) 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 (os_memcmp(dev->dev.mac_addr, addr, ETH_ALEN) == 0) 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 (os_memcmp(pbc->addr, addr, ETH_ALEN) == 0 && 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 os_memcmp(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN) == 409 0)) { 410 if (prev) 411 prev->next = pbc->next; 412 else 413 reg->pbc_sessions = pbc->next; 414 tmp = pbc; 415 pbc = pbc->next; 416 wpa_printf(MSG_DEBUG, "WPS: Removing PBC session for " 417 "addr=" MACSTR, MAC2STR(tmp->addr)); 418 wpa_hexdump(MSG_DEBUG, "WPS: Removed UUID-E", 419 tmp->uuid_e, WPS_UUID_LEN); 420 os_free(tmp); 421 continue; 422 } 423 prev = pbc; 424 pbc = pbc->next; 425 } 426 } 427 428 429 int wps_registrar_pbc_overlap(struct wps_registrar *reg, 430 const u8 *addr, const u8 *uuid_e) 431 { 432 int count = 0; 433 struct wps_pbc_session *pbc; 434 struct wps_pbc_session *first = NULL; 435 struct os_reltime now; 436 437 os_get_reltime(&now); 438 439 wpa_printf(MSG_DEBUG, "WPS: Checking active PBC sessions for overlap"); 440 441 if (uuid_e) { 442 wpa_printf(MSG_DEBUG, "WPS: Add one for the requested UUID"); 443 wpa_hexdump(MSG_DEBUG, "WPS: Requested UUID", 444 uuid_e, WPS_UUID_LEN); 445 count++; 446 } 447 448 for (pbc = reg->pbc_sessions; pbc; pbc = pbc->next) { 449 wpa_printf(MSG_DEBUG, "WPS: Consider PBC session with " MACSTR, 450 MAC2STR(pbc->addr)); 451 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", 452 pbc->uuid_e, WPS_UUID_LEN); 453 if (os_reltime_expired(&now, &pbc->timestamp, 454 WPS_PBC_WALK_TIME)) { 455 wpa_printf(MSG_DEBUG, "WPS: PBC walk time has expired"); 456 break; 457 } 458 if (first && 459 os_memcmp(pbc->uuid_e, first->uuid_e, WPS_UUID_LEN) == 0) { 460 wpa_printf(MSG_DEBUG, "WPS: Same Enrollee"); 461 continue; /* same Enrollee */ 462 } 463 if (uuid_e == NULL || 464 os_memcmp(uuid_e, pbc->uuid_e, WPS_UUID_LEN)) { 465 wpa_printf(MSG_DEBUG, "WPS: New Enrollee"); 466 count++; 467 } 468 if (first == NULL) 469 first = pbc; 470 } 471 472 wpa_printf(MSG_DEBUG, "WPS: %u active PBC session(s) found", count); 473 474 return count > 1 ? 1 : 0; 475 } 476 477 478 static int wps_build_wps_state(struct wps_context *wps, struct wpabuf *msg) 479 { 480 wpa_printf(MSG_DEBUG, "WPS: * Wi-Fi Protected Setup State (%d)", 481 wps->wps_state); 482 wpabuf_put_be16(msg, ATTR_WPS_STATE); 483 wpabuf_put_be16(msg, 1); 484 wpabuf_put_u8(msg, wps->wps_state); 485 return 0; 486 } 487 488 489 #ifdef CONFIG_WPS_UPNP 490 static void wps_registrar_free_pending_m2(struct wps_context *wps) 491 { 492 struct upnp_pending_message *p, *p2, *prev = NULL; 493 p = wps->upnp_msgs; 494 while (p) { 495 if (p->type == WPS_M2 || p->type == WPS_M2D) { 496 if (prev == NULL) 497 wps->upnp_msgs = p->next; 498 else 499 prev->next = p->next; 500 wpa_printf(MSG_DEBUG, "WPS UPnP: Drop pending M2/M2D"); 501 p2 = p; 502 p = p->next; 503 wpabuf_free(p2->msg); 504 os_free(p2); 505 continue; 506 } 507 prev = p; 508 p = p->next; 509 } 510 } 511 #endif /* CONFIG_WPS_UPNP */ 512 513 514 static int wps_build_ap_setup_locked(struct wps_context *wps, 515 struct wpabuf *msg) 516 { 517 if (wps->ap_setup_locked && wps->ap_setup_locked != 2) { 518 wpa_printf(MSG_DEBUG, "WPS: * AP Setup Locked"); 519 wpabuf_put_be16(msg, ATTR_AP_SETUP_LOCKED); 520 wpabuf_put_be16(msg, 1); 521 wpabuf_put_u8(msg, 1); 522 } 523 return 0; 524 } 525 526 527 static int wps_build_selected_registrar(struct wps_registrar *reg, 528 struct wpabuf *msg) 529 { 530 if (!reg->sel_reg_union) 531 return 0; 532 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar"); 533 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR); 534 wpabuf_put_be16(msg, 1); 535 wpabuf_put_u8(msg, 1); 536 return 0; 537 } 538 539 540 static int wps_build_sel_reg_dev_password_id(struct wps_registrar *reg, 541 struct wpabuf *msg) 542 { 543 u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT; 544 if (!reg->sel_reg_union) 545 return 0; 546 if (reg->sel_reg_dev_password_id_override >= 0) 547 id = reg->sel_reg_dev_password_id_override; 548 wpa_printf(MSG_DEBUG, "WPS: * Device Password ID (%d)", id); 549 wpabuf_put_be16(msg, ATTR_DEV_PASSWORD_ID); 550 wpabuf_put_be16(msg, 2); 551 wpabuf_put_be16(msg, id); 552 return 0; 553 } 554 555 556 static int wps_build_sel_pbc_reg_uuid_e(struct wps_registrar *reg, 557 struct wpabuf *msg) 558 { 559 u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT; 560 if (!reg->sel_reg_union) 561 return 0; 562 if (reg->sel_reg_dev_password_id_override >= 0) 563 id = reg->sel_reg_dev_password_id_override; 564 if (id != DEV_PW_PUSHBUTTON || !reg->dualband) 565 return 0; 566 return wps_build_uuid_e(msg, reg->wps->uuid); 567 } 568 569 570 static void wps_set_pushbutton(u16 *methods, u16 conf_methods) 571 { 572 *methods |= WPS_CONFIG_PUSHBUTTON; 573 if ((conf_methods & WPS_CONFIG_VIRT_PUSHBUTTON) == 574 WPS_CONFIG_VIRT_PUSHBUTTON) 575 *methods |= WPS_CONFIG_VIRT_PUSHBUTTON; 576 if ((conf_methods & WPS_CONFIG_PHY_PUSHBUTTON) == 577 WPS_CONFIG_PHY_PUSHBUTTON) 578 *methods |= WPS_CONFIG_PHY_PUSHBUTTON; 579 if ((*methods & WPS_CONFIG_VIRT_PUSHBUTTON) != 580 WPS_CONFIG_VIRT_PUSHBUTTON && 581 (*methods & WPS_CONFIG_PHY_PUSHBUTTON) != 582 WPS_CONFIG_PHY_PUSHBUTTON) { 583 /* 584 * Required to include virtual/physical flag, but we were not 585 * configured with push button type, so have to default to one 586 * of them. 587 */ 588 *methods |= WPS_CONFIG_PHY_PUSHBUTTON; 589 } 590 } 591 592 593 static int wps_build_sel_reg_config_methods(struct wps_registrar *reg, 594 struct wpabuf *msg) 595 { 596 u16 methods; 597 if (!reg->sel_reg_union) 598 return 0; 599 methods = reg->wps->config_methods; 600 methods &= ~WPS_CONFIG_PUSHBUTTON; 601 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 602 WPS_CONFIG_PHY_PUSHBUTTON); 603 if (reg->pbc) 604 wps_set_pushbutton(&methods, reg->wps->config_methods); 605 if (reg->sel_reg_config_methods_override >= 0) 606 methods = reg->sel_reg_config_methods_override; 607 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar Config Methods (%x)", 608 methods); 609 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR_CONFIG_METHODS); 610 wpabuf_put_be16(msg, 2); 611 wpabuf_put_be16(msg, methods); 612 return 0; 613 } 614 615 616 static int wps_build_probe_config_methods(struct wps_registrar *reg, 617 struct wpabuf *msg) 618 { 619 u16 methods; 620 /* 621 * These are the methods that the AP supports as an Enrollee for adding 622 * external Registrars. 623 */ 624 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 625 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 626 WPS_CONFIG_PHY_PUSHBUTTON); 627 wpa_printf(MSG_DEBUG, "WPS: * Config Methods (%x)", methods); 628 wpabuf_put_be16(msg, ATTR_CONFIG_METHODS); 629 wpabuf_put_be16(msg, 2); 630 wpabuf_put_be16(msg, methods); 631 return 0; 632 } 633 634 635 static int wps_build_config_methods_r(struct wps_registrar *reg, 636 struct wpabuf *msg) 637 { 638 return wps_build_config_methods(msg, reg->wps->config_methods); 639 } 640 641 642 const u8 * wps_authorized_macs(struct wps_registrar *reg, size_t *count) 643 { 644 *count = 0; 645 646 while (*count < WPS_MAX_AUTHORIZED_MACS) { 647 if (is_zero_ether_addr(reg->authorized_macs_union[*count])) 648 break; 649 (*count)++; 650 } 651 652 return (const u8 *) reg->authorized_macs_union; 653 } 654 655 656 /** 657 * wps_registrar_init - Initialize WPS Registrar data 658 * @wps: Pointer to longterm WPS context 659 * @cfg: Registrar configuration 660 * Returns: Pointer to allocated Registrar data or %NULL on failure 661 * 662 * This function is used to initialize WPS Registrar functionality. It can be 663 * used for a single Registrar run (e.g., when run in a supplicant) or multiple 664 * runs (e.g., when run as an internal Registrar in an AP). Caller is 665 * responsible for freeing the returned data with wps_registrar_deinit() when 666 * Registrar functionality is not needed anymore. 667 */ 668 struct wps_registrar * 669 wps_registrar_init(struct wps_context *wps, 670 const struct wps_registrar_config *cfg) 671 { 672 struct wps_registrar *reg = os_zalloc(sizeof(*reg)); 673 if (reg == NULL) 674 return NULL; 675 676 dl_list_init(®->pins); 677 dl_list_init(®->nfc_pw_tokens); 678 reg->wps = wps; 679 reg->new_psk_cb = cfg->new_psk_cb; 680 reg->set_ie_cb = cfg->set_ie_cb; 681 reg->pin_needed_cb = cfg->pin_needed_cb; 682 reg->reg_success_cb = cfg->reg_success_cb; 683 reg->set_sel_reg_cb = cfg->set_sel_reg_cb; 684 reg->enrollee_seen_cb = cfg->enrollee_seen_cb; 685 reg->lookup_pskfile_cb = cfg->lookup_pskfile_cb; 686 reg->cb_ctx = cfg->cb_ctx; 687 reg->skip_cred_build = cfg->skip_cred_build; 688 if (cfg->extra_cred) { 689 reg->extra_cred = wpabuf_alloc_copy(cfg->extra_cred, 690 cfg->extra_cred_len); 691 if (reg->extra_cred == NULL) { 692 os_free(reg); 693 return NULL; 694 } 695 } 696 reg->disable_auto_conf = cfg->disable_auto_conf; 697 reg->sel_reg_dev_password_id_override = -1; 698 reg->sel_reg_config_methods_override = -1; 699 reg->dualband = cfg->dualband; 700 reg->force_per_enrollee_psk = cfg->force_per_enrollee_psk; 701 702 if (cfg->multi_ap_backhaul_ssid) { 703 os_memcpy(reg->multi_ap_backhaul_ssid, 704 cfg->multi_ap_backhaul_ssid, 705 cfg->multi_ap_backhaul_ssid_len); 706 reg->multi_ap_backhaul_ssid_len = 707 cfg->multi_ap_backhaul_ssid_len; 708 } 709 if (cfg->multi_ap_backhaul_network_key) { 710 reg->multi_ap_backhaul_network_key = 711 os_memdup(cfg->multi_ap_backhaul_network_key, 712 cfg->multi_ap_backhaul_network_key_len); 713 if (reg->multi_ap_backhaul_network_key) 714 reg->multi_ap_backhaul_network_key_len = 715 cfg->multi_ap_backhaul_network_key_len; 716 } 717 718 if (wps_set_ie(reg)) { 719 wps_registrar_deinit(reg); 720 return NULL; 721 } 722 723 return reg; 724 } 725 726 727 void wps_registrar_flush(struct wps_registrar *reg) 728 { 729 if (reg == NULL) 730 return; 731 wps_free_pins(®->pins); 732 wps_free_nfc_pw_tokens(®->nfc_pw_tokens, 0); 733 wps_free_pbc_sessions(reg->pbc_sessions); 734 reg->pbc_sessions = NULL; 735 wps_free_devices(reg->devices); 736 reg->devices = NULL; 737 #ifdef WPS_WORKAROUNDS 738 reg->pbc_ignore_start.sec = 0; 739 #endif /* WPS_WORKAROUNDS */ 740 } 741 742 743 /** 744 * wps_registrar_deinit - Deinitialize WPS Registrar data 745 * @reg: Registrar data from wps_registrar_init() 746 */ 747 void wps_registrar_deinit(struct wps_registrar *reg) 748 { 749 if (reg == NULL) 750 return; 751 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 752 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 753 wps_registrar_flush(reg); 754 wpabuf_clear_free(reg->extra_cred); 755 bin_clear_free(reg->multi_ap_backhaul_network_key, 756 reg->multi_ap_backhaul_network_key_len); 757 os_free(reg); 758 } 759 760 761 static void wps_registrar_invalidate_unused(struct wps_registrar *reg) 762 { 763 struct wps_uuid_pin *pin; 764 765 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 766 if (pin->wildcard_uuid == 1 && !(pin->flags & PIN_LOCKED)) { 767 wpa_printf(MSG_DEBUG, "WPS: Invalidate previously " 768 "configured wildcard PIN"); 769 wps_registrar_remove_pin(reg, pin); 770 break; 771 } 772 } 773 } 774 775 776 /** 777 * wps_registrar_add_pin - Configure a new PIN for Registrar 778 * @reg: Registrar data from wps_registrar_init() 779 * @addr: Enrollee MAC address or %NULL if not known 780 * @uuid: UUID-E or %NULL for wildcard (any UUID) 781 * @pin: PIN (Device Password) 782 * @pin_len: Length of pin in octets 783 * @timeout: Time (in seconds) when the PIN will be invalidated; 0 = no timeout 784 * Returns: 0 on success, -1 on failure 785 */ 786 int wps_registrar_add_pin(struct wps_registrar *reg, const u8 *addr, 787 const u8 *uuid, const u8 *pin, size_t pin_len, 788 int timeout) 789 { 790 struct wps_uuid_pin *p; 791 792 p = os_zalloc(sizeof(*p)); 793 if (p == NULL) 794 return -1; 795 if (addr) 796 os_memcpy(p->enrollee_addr, addr, ETH_ALEN); 797 if (uuid == NULL) 798 p->wildcard_uuid = 1; 799 else 800 os_memcpy(p->uuid, uuid, WPS_UUID_LEN); 801 p->pin = os_memdup(pin, pin_len); 802 if (p->pin == NULL) { 803 os_free(p); 804 return -1; 805 } 806 p->pin_len = pin_len; 807 808 if (timeout) { 809 p->flags |= PIN_EXPIRES; 810 os_get_reltime(&p->expiration); 811 p->expiration.sec += timeout; 812 } 813 814 if (p->wildcard_uuid) 815 wps_registrar_invalidate_unused(reg); 816 817 dl_list_add(®->pins, &p->list); 818 819 wpa_printf(MSG_DEBUG, "WPS: A new PIN configured (timeout=%d)", 820 timeout); 821 wpa_hexdump(MSG_DEBUG, "WPS: UUID", uuid, WPS_UUID_LEN); 822 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: PIN", pin, pin_len); 823 reg->selected_registrar = 1; 824 reg->pbc = 0; 825 if (addr) 826 wps_registrar_add_authorized_mac(reg, addr); 827 else 828 wps_registrar_add_authorized_mac( 829 reg, (u8 *) "\xff\xff\xff\xff\xff\xff"); 830 wps_registrar_selected_registrar_changed(reg, 0); 831 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 832 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, 833 wps_registrar_set_selected_timeout, 834 reg, NULL); 835 836 return 0; 837 } 838 839 840 static void wps_registrar_remove_pin(struct wps_registrar *reg, 841 struct wps_uuid_pin *pin) 842 { 843 u8 *addr; 844 u8 bcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 845 846 if (is_zero_ether_addr(pin->enrollee_addr)) 847 addr = bcast; 848 else 849 addr = pin->enrollee_addr; 850 wps_registrar_remove_authorized_mac(reg, addr); 851 wps_remove_pin(pin); 852 wps_registrar_selected_registrar_changed(reg, 0); 853 } 854 855 856 static void wps_registrar_expire_pins(struct wps_registrar *reg) 857 { 858 struct wps_uuid_pin *pin, *prev; 859 struct os_reltime now; 860 861 os_get_reltime(&now); 862 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 863 { 864 if ((pin->flags & PIN_EXPIRES) && 865 os_reltime_before(&pin->expiration, &now)) { 866 wpa_hexdump(MSG_DEBUG, "WPS: Expired PIN for UUID", 867 pin->uuid, WPS_UUID_LEN); 868 wps_registrar_remove_pin(reg, pin); 869 } 870 } 871 } 872 873 874 /** 875 * wps_registrar_invalidate_wildcard_pin - Invalidate a wildcard PIN 876 * @reg: Registrar data from wps_registrar_init() 877 * @dev_pw: PIN to search for or %NULL to match any 878 * @dev_pw_len: Length of dev_pw in octets 879 * Returns: 0 on success, -1 if not wildcard PIN is enabled 880 */ 881 static int wps_registrar_invalidate_wildcard_pin(struct wps_registrar *reg, 882 const u8 *dev_pw, 883 size_t dev_pw_len) 884 { 885 struct wps_uuid_pin *pin, *prev; 886 887 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 888 { 889 if (dev_pw && pin->pin && 890 (dev_pw_len != pin->pin_len || 891 os_memcmp_const(dev_pw, pin->pin, dev_pw_len) != 0)) 892 continue; /* different PIN */ 893 if (pin->wildcard_uuid) { 894 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID", 895 pin->uuid, WPS_UUID_LEN); 896 wps_registrar_remove_pin(reg, pin); 897 return 0; 898 } 899 } 900 901 return -1; 902 } 903 904 905 /** 906 * wps_registrar_invalidate_pin - Invalidate a PIN for a specific UUID-E 907 * @reg: Registrar data from wps_registrar_init() 908 * @uuid: UUID-E 909 * Returns: 0 on success, -1 on failure (e.g., PIN not found) 910 */ 911 int wps_registrar_invalidate_pin(struct wps_registrar *reg, const u8 *uuid) 912 { 913 struct wps_uuid_pin *pin, *prev; 914 915 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 916 { 917 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 918 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID", 919 pin->uuid, WPS_UUID_LEN); 920 wps_registrar_remove_pin(reg, pin); 921 return 0; 922 } 923 } 924 925 return -1; 926 } 927 928 929 static const u8 * wps_registrar_get_pin(struct wps_registrar *reg, 930 const u8 *uuid, size_t *pin_len) 931 { 932 struct wps_uuid_pin *pin, *found = NULL; 933 int wildcard = 0; 934 935 wps_registrar_expire_pins(reg); 936 937 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 938 if (!pin->wildcard_uuid && 939 os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 940 found = pin; 941 break; 942 } 943 } 944 945 if (!found) { 946 /* Check for wildcard UUIDs since none of the UUID-specific 947 * PINs matched */ 948 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 949 if (pin->wildcard_uuid == 1 || 950 pin->wildcard_uuid == 2) { 951 wpa_printf(MSG_DEBUG, "WPS: Found a wildcard " 952 "PIN. Assigned it for this UUID-E"); 953 wildcard = 1; 954 os_memcpy(pin->uuid, uuid, WPS_UUID_LEN); 955 found = pin; 956 break; 957 } 958 } 959 } 960 961 if (!found) 962 return NULL; 963 964 /* 965 * Lock the PIN to avoid attacks based on concurrent re-use of the PIN 966 * that could otherwise avoid PIN invalidations. 967 */ 968 if (found->flags & PIN_LOCKED) { 969 wpa_printf(MSG_DEBUG, "WPS: Selected PIN locked - do not " 970 "allow concurrent re-use"); 971 return NULL; 972 } 973 *pin_len = found->pin_len; 974 found->flags |= PIN_LOCKED; 975 if (wildcard) 976 found->wildcard_uuid++; 977 return found->pin; 978 } 979 980 981 /** 982 * wps_registrar_unlock_pin - Unlock a PIN for a specific UUID-E 983 * @reg: Registrar data from wps_registrar_init() 984 * @uuid: UUID-E 985 * Returns: 0 on success, -1 on failure 986 * 987 * PINs are locked to enforce only one concurrent use. This function unlocks a 988 * PIN to allow it to be used again. If the specified PIN was configured using 989 * a wildcard UUID, it will be removed instead of allowing multiple uses. 990 */ 991 int wps_registrar_unlock_pin(struct wps_registrar *reg, const u8 *uuid) 992 { 993 struct wps_uuid_pin *pin; 994 995 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 996 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 997 if (pin->wildcard_uuid == 3) { 998 wpa_printf(MSG_DEBUG, "WPS: Invalidating used " 999 "wildcard PIN"); 1000 return wps_registrar_invalidate_pin(reg, uuid); 1001 } 1002 pin->flags &= ~PIN_LOCKED; 1003 return 0; 1004 } 1005 } 1006 1007 return -1; 1008 } 1009 1010 1011 static void wps_registrar_stop_pbc(struct wps_registrar *reg) 1012 { 1013 reg->selected_registrar = 0; 1014 reg->pbc = 0; 1015 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN); 1016 wps_registrar_remove_authorized_mac(reg, 1017 (u8 *) "\xff\xff\xff\xff\xff\xff"); 1018 wps_registrar_selected_registrar_changed(reg, 0); 1019 } 1020 1021 1022 static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx) 1023 { 1024 struct wps_registrar *reg = eloop_ctx; 1025 1026 wpa_printf(MSG_DEBUG, "WPS: PBC timed out - disable PBC mode"); 1027 wps_pbc_timeout_event(reg->wps); 1028 wps_registrar_stop_pbc(reg); 1029 } 1030 1031 1032 /** 1033 * wps_registrar_button_pushed - Notify Registrar that AP button was pushed 1034 * @reg: Registrar data from wps_registrar_init() 1035 * @p2p_dev_addr: Limit allowed PBC devices to the specified P2P device, %NULL 1036 * indicates no such filtering 1037 * Returns: 0 on success, -1 on failure, -2 on session overlap 1038 * 1039 * This function is called on an AP when a push button is pushed to activate 1040 * PBC mode. The PBC mode will be stopped after walk time (2 minutes) timeout 1041 * or when a PBC registration is completed. If more than one Enrollee in active 1042 * PBC mode has been detected during the monitor time (previous 2 minutes), the 1043 * PBC mode is not activated and -2 is returned to indicate session overlap. 1044 * This is skipped if a specific Enrollee is selected. 1045 */ 1046 int wps_registrar_button_pushed(struct wps_registrar *reg, 1047 const u8 *p2p_dev_addr) 1048 { 1049 if (p2p_dev_addr == NULL && 1050 wps_registrar_pbc_overlap(reg, NULL, NULL)) { 1051 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - do not start PBC " 1052 "mode"); 1053 wps_pbc_overlap_event(reg->wps); 1054 return -2; 1055 } 1056 wpa_printf(MSG_DEBUG, "WPS: Button pushed - PBC mode started"); 1057 reg->force_pbc_overlap = 0; 1058 reg->selected_registrar = 1; 1059 reg->pbc = 1; 1060 if (p2p_dev_addr) 1061 os_memcpy(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN); 1062 else 1063 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN); 1064 wps_registrar_add_authorized_mac(reg, 1065 (u8 *) "\xff\xff\xff\xff\xff\xff"); 1066 wps_registrar_selected_registrar_changed(reg, 0); 1067 1068 wps_pbc_active_event(reg->wps); 1069 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 1070 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 1071 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wps_registrar_pbc_timeout, 1072 reg, NULL); 1073 return 0; 1074 } 1075 1076 1077 static void wps_registrar_pbc_completed(struct wps_registrar *reg) 1078 { 1079 wpa_printf(MSG_DEBUG, "WPS: PBC completed - stopping PBC mode"); 1080 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 1081 wps_registrar_stop_pbc(reg); 1082 wps_pbc_disable_event(reg->wps); 1083 } 1084 1085 1086 static void wps_registrar_pin_completed(struct wps_registrar *reg) 1087 { 1088 wpa_printf(MSG_DEBUG, "WPS: PIN completed using internal Registrar"); 1089 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 1090 reg->selected_registrar = 0; 1091 wps_registrar_selected_registrar_changed(reg, 0); 1092 } 1093 1094 1095 void wps_registrar_complete(struct wps_registrar *registrar, const u8 *uuid_e, 1096 const u8 *dev_pw, size_t dev_pw_len) 1097 { 1098 if (registrar->pbc) { 1099 wps_registrar_remove_pbc_session(registrar, 1100 uuid_e, NULL); 1101 wps_registrar_pbc_completed(registrar); 1102 #ifdef WPS_WORKAROUNDS 1103 os_get_reltime(®istrar->pbc_ignore_start); 1104 #endif /* WPS_WORKAROUNDS */ 1105 os_memcpy(registrar->pbc_ignore_uuid, uuid_e, WPS_UUID_LEN); 1106 } else { 1107 wps_registrar_pin_completed(registrar); 1108 } 1109 1110 if (dev_pw && 1111 wps_registrar_invalidate_wildcard_pin(registrar, dev_pw, 1112 dev_pw_len) == 0) { 1113 wpa_hexdump_key(MSG_DEBUG, "WPS: Invalidated wildcard PIN", 1114 dev_pw, dev_pw_len); 1115 } 1116 } 1117 1118 1119 int wps_registrar_wps_cancel(struct wps_registrar *reg) 1120 { 1121 if (reg->pbc) { 1122 wpa_printf(MSG_DEBUG, "WPS: PBC is set - cancelling it"); 1123 wps_registrar_pbc_timeout(reg, NULL); 1124 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 1125 return 1; 1126 } else if (reg->selected_registrar) { 1127 /* PIN Method */ 1128 wpa_printf(MSG_DEBUG, "WPS: PIN is set - cancelling it"); 1129 wps_registrar_pin_completed(reg); 1130 wps_registrar_invalidate_wildcard_pin(reg, NULL, 0); 1131 return 1; 1132 } 1133 return 0; 1134 } 1135 1136 1137 /** 1138 * wps_registrar_probe_req_rx - Notify Registrar of Probe Request 1139 * @reg: Registrar data from wps_registrar_init() 1140 * @addr: MAC address of the Probe Request sender 1141 * @wps_data: WPS IE contents 1142 * 1143 * This function is called on an AP when a Probe Request with WPS IE is 1144 * received. This is used to track PBC mode use and to detect possible overlap 1145 * situation with other WPS APs. 1146 */ 1147 void wps_registrar_probe_req_rx(struct wps_registrar *reg, const u8 *addr, 1148 const struct wpabuf *wps_data, 1149 int p2p_wildcard) 1150 { 1151 struct wps_parse_attr attr; 1152 int skip_add = 0; 1153 1154 wpa_hexdump_buf(MSG_MSGDUMP, 1155 "WPS: Probe Request with WPS data received", 1156 wps_data); 1157 1158 if (wps_parse_msg(wps_data, &attr) < 0) 1159 return; 1160 1161 if (attr.config_methods == NULL) { 1162 wpa_printf(MSG_DEBUG, "WPS: No Config Methods attribute in " 1163 "Probe Request"); 1164 return; 1165 } 1166 1167 if (attr.dev_password_id == NULL) { 1168 wpa_printf(MSG_DEBUG, "WPS: No Device Password Id attribute " 1169 "in Probe Request"); 1170 return; 1171 } 1172 1173 if (reg->enrollee_seen_cb && attr.uuid_e && 1174 attr.primary_dev_type && attr.request_type && !p2p_wildcard) { 1175 char *dev_name = NULL; 1176 if (attr.dev_name) { 1177 dev_name = os_zalloc(attr.dev_name_len + 1); 1178 if (dev_name) { 1179 os_memcpy(dev_name, attr.dev_name, 1180 attr.dev_name_len); 1181 } 1182 } 1183 reg->enrollee_seen_cb(reg->cb_ctx, addr, attr.uuid_e, 1184 attr.primary_dev_type, 1185 WPA_GET_BE16(attr.config_methods), 1186 WPA_GET_BE16(attr.dev_password_id), 1187 *attr.request_type, dev_name); 1188 os_free(dev_name); 1189 } 1190 1191 if (WPA_GET_BE16(attr.dev_password_id) != DEV_PW_PUSHBUTTON) 1192 return; /* Not PBC */ 1193 1194 wpa_printf(MSG_DEBUG, "WPS: Probe Request for PBC received from " 1195 MACSTR, MAC2STR(addr)); 1196 if (attr.uuid_e == NULL) { 1197 wpa_printf(MSG_DEBUG, "WPS: Invalid Probe Request WPS IE: No " 1198 "UUID-E included"); 1199 return; 1200 } 1201 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E from Probe Request", attr.uuid_e, 1202 WPS_UUID_LEN); 1203 1204 #ifdef WPS_WORKAROUNDS 1205 if (reg->pbc_ignore_start.sec && 1206 os_memcmp(attr.uuid_e, reg->pbc_ignore_uuid, WPS_UUID_LEN) == 0) { 1207 struct os_reltime now, dur; 1208 os_get_reltime(&now); 1209 os_reltime_sub(&now, ®->pbc_ignore_start, &dur); 1210 if (dur.sec >= 0 && dur.sec < 5) { 1211 wpa_printf(MSG_DEBUG, "WPS: Ignore PBC activation " 1212 "based on Probe Request from the Enrollee " 1213 "that just completed PBC provisioning"); 1214 skip_add = 1; 1215 } else 1216 reg->pbc_ignore_start.sec = 0; 1217 } 1218 #endif /* WPS_WORKAROUNDS */ 1219 1220 if (!skip_add) 1221 wps_registrar_add_pbc_session(reg, addr, attr.uuid_e); 1222 if (wps_registrar_pbc_overlap(reg, addr, attr.uuid_e)) { 1223 wpa_printf(MSG_DEBUG, "WPS: PBC session overlap detected"); 1224 reg->force_pbc_overlap = 1; 1225 wps_pbc_overlap_event(reg->wps); 1226 } 1227 } 1228 1229 1230 int wps_cb_new_psk(struct wps_registrar *reg, const u8 *mac_addr, 1231 const u8 *p2p_dev_addr, const u8 *psk, size_t psk_len) 1232 { 1233 if (reg->new_psk_cb == NULL) 1234 return 0; 1235 1236 return reg->new_psk_cb(reg->cb_ctx, mac_addr, p2p_dev_addr, psk, 1237 psk_len); 1238 } 1239 1240 1241 static void wps_cb_pin_needed(struct wps_registrar *reg, const u8 *uuid_e, 1242 const struct wps_device_data *dev) 1243 { 1244 if (reg->pin_needed_cb == NULL) 1245 return; 1246 1247 reg->pin_needed_cb(reg->cb_ctx, uuid_e, dev); 1248 } 1249 1250 1251 static void wps_cb_reg_success(struct wps_registrar *reg, const u8 *mac_addr, 1252 const u8 *uuid_e, const u8 *dev_pw, 1253 size_t dev_pw_len) 1254 { 1255 if (reg->reg_success_cb == NULL) 1256 return; 1257 1258 reg->reg_success_cb(reg->cb_ctx, mac_addr, uuid_e, dev_pw, dev_pw_len); 1259 } 1260 1261 1262 static int wps_cb_set_ie(struct wps_registrar *reg, struct wpabuf *beacon_ie, 1263 struct wpabuf *probe_resp_ie) 1264 { 1265 return reg->set_ie_cb(reg->cb_ctx, beacon_ie, probe_resp_ie); 1266 } 1267 1268 1269 static void wps_cb_set_sel_reg(struct wps_registrar *reg) 1270 { 1271 u16 methods = 0; 1272 if (reg->set_sel_reg_cb == NULL) 1273 return; 1274 1275 if (reg->selected_registrar) { 1276 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 1277 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 1278 WPS_CONFIG_PHY_PUSHBUTTON); 1279 if (reg->pbc) 1280 wps_set_pushbutton(&methods, reg->wps->config_methods); 1281 } 1282 1283 wpa_printf(MSG_DEBUG, "WPS: wps_cb_set_sel_reg: sel_reg=%d " 1284 "config_methods=0x%x pbc=%d methods=0x%x", 1285 reg->selected_registrar, reg->wps->config_methods, 1286 reg->pbc, methods); 1287 1288 reg->set_sel_reg_cb(reg->cb_ctx, reg->selected_registrar, 1289 reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT, 1290 methods); 1291 } 1292 1293 1294 static int wps_cp_lookup_pskfile(struct wps_registrar *reg, const u8 *mac_addr, 1295 const u8 **psk) 1296 { 1297 if (!reg->lookup_pskfile_cb) 1298 return 0; 1299 return reg->lookup_pskfile_cb(reg->cb_ctx, mac_addr, psk); 1300 } 1301 1302 1303 static int wps_set_ie(struct wps_registrar *reg) 1304 { 1305 struct wpabuf *beacon; 1306 struct wpabuf *probe; 1307 const u8 *auth_macs; 1308 size_t count; 1309 size_t vendor_len = 0; 1310 int i; 1311 1312 if (reg->set_ie_cb == NULL) 1313 return 0; 1314 1315 for (i = 0; i < MAX_WPS_VENDOR_EXTENSIONS; i++) { 1316 if (reg->wps->dev.vendor_ext[i]) { 1317 vendor_len += 2 + 2; 1318 vendor_len += wpabuf_len(reg->wps->dev.vendor_ext[i]); 1319 } 1320 } 1321 1322 beacon = wpabuf_alloc(400 + vendor_len); 1323 probe = wpabuf_alloc(500 + vendor_len); 1324 if (!beacon || !probe) 1325 goto fail; 1326 1327 auth_macs = wps_authorized_macs(reg, &count); 1328 1329 wpa_printf(MSG_DEBUG, "WPS: Build Beacon IEs"); 1330 1331 if (wps_build_version(beacon) || 1332 wps_build_wps_state(reg->wps, beacon) || 1333 wps_build_ap_setup_locked(reg->wps, beacon) || 1334 wps_build_selected_registrar(reg, beacon) || 1335 wps_build_sel_reg_dev_password_id(reg, beacon) || 1336 wps_build_sel_reg_config_methods(reg, beacon) || 1337 wps_build_sel_pbc_reg_uuid_e(reg, beacon) || 1338 (reg->dualband && wps_build_rf_bands(®->wps->dev, beacon, 0)) || 1339 wps_build_wfa_ext(beacon, 0, auth_macs, count, 0) || 1340 wps_build_vendor_ext(®->wps->dev, beacon) || 1341 wps_build_application_ext(®->wps->dev, beacon)) 1342 goto fail; 1343 1344 #ifdef CONFIG_P2P 1345 if (wps_build_dev_name(®->wps->dev, beacon) || 1346 wps_build_primary_dev_type(®->wps->dev, beacon)) 1347 goto fail; 1348 #endif /* CONFIG_P2P */ 1349 1350 wpa_printf(MSG_DEBUG, "WPS: Build Probe Response IEs"); 1351 1352 if (wps_build_version(probe) || 1353 wps_build_wps_state(reg->wps, probe) || 1354 wps_build_ap_setup_locked(reg->wps, probe) || 1355 wps_build_selected_registrar(reg, probe) || 1356 wps_build_sel_reg_dev_password_id(reg, probe) || 1357 wps_build_sel_reg_config_methods(reg, probe) || 1358 wps_build_resp_type(probe, reg->wps->ap ? WPS_RESP_AP : 1359 WPS_RESP_REGISTRAR) || 1360 wps_build_uuid_e(probe, reg->wps->uuid) || 1361 wps_build_device_attrs(®->wps->dev, probe) || 1362 wps_build_probe_config_methods(reg, probe) || 1363 (reg->dualband && wps_build_rf_bands(®->wps->dev, probe, 0)) || 1364 wps_build_wfa_ext(probe, 0, auth_macs, count, 0) || 1365 wps_build_vendor_ext(®->wps->dev, probe) || 1366 wps_build_application_ext(®->wps->dev, probe)) 1367 goto fail; 1368 1369 beacon = wps_ie_encapsulate(beacon); 1370 probe = wps_ie_encapsulate(probe); 1371 1372 if (!beacon || !probe) 1373 goto fail; 1374 1375 return wps_cb_set_ie(reg, beacon, probe); 1376 fail: 1377 wpabuf_free(beacon); 1378 wpabuf_free(probe); 1379 return -1; 1380 } 1381 1382 1383 static int wps_get_dev_password(struct wps_data *wps) 1384 { 1385 const u8 *pin; 1386 size_t pin_len = 0; 1387 1388 bin_clear_free(wps->dev_password, wps->dev_password_len); 1389 wps->dev_password = NULL; 1390 1391 if (wps->pbc) { 1392 wpa_printf(MSG_DEBUG, "WPS: Use default PIN for PBC"); 1393 pin = (const u8 *) "00000000"; 1394 pin_len = 8; 1395 #ifdef CONFIG_WPS_NFC 1396 } else if (wps->nfc_pw_token) { 1397 if (wps->nfc_pw_token->pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) 1398 { 1399 wpa_printf(MSG_DEBUG, "WPS: Using NFC connection " 1400 "handover and abbreviated WPS handshake " 1401 "without Device Password"); 1402 return 0; 1403 } 1404 wpa_printf(MSG_DEBUG, "WPS: Use OOB Device Password from NFC " 1405 "Password Token"); 1406 pin = wps->nfc_pw_token->dev_pw; 1407 pin_len = wps->nfc_pw_token->dev_pw_len; 1408 } else if (wps->dev_pw_id >= 0x10 && 1409 wps->wps->ap_nfc_dev_pw_id == wps->dev_pw_id && 1410 wps->wps->ap_nfc_dev_pw) { 1411 wpa_printf(MSG_DEBUG, "WPS: Use OOB Device Password from own NFC Password Token"); 1412 pin = wpabuf_head(wps->wps->ap_nfc_dev_pw); 1413 pin_len = wpabuf_len(wps->wps->ap_nfc_dev_pw); 1414 #endif /* CONFIG_WPS_NFC */ 1415 } else { 1416 pin = wps_registrar_get_pin(wps->wps->registrar, wps->uuid_e, 1417 &pin_len); 1418 if (pin && wps->dev_pw_id >= 0x10) { 1419 wpa_printf(MSG_DEBUG, "WPS: No match for OOB Device " 1420 "Password ID, but PIN found"); 1421 /* 1422 * See whether Enrollee is willing to use PIN instead. 1423 */ 1424 wps->dev_pw_id = DEV_PW_DEFAULT; 1425 } 1426 } 1427 if (pin == NULL) { 1428 wpa_printf(MSG_DEBUG, "WPS: No Device Password available for " 1429 "the Enrollee (context %p registrar %p)", 1430 wps->wps, wps->wps->registrar); 1431 wps_cb_pin_needed(wps->wps->registrar, wps->uuid_e, 1432 &wps->peer_dev); 1433 return -1; 1434 } 1435 1436 wps->dev_password = os_memdup(pin, pin_len); 1437 if (wps->dev_password == NULL) 1438 return -1; 1439 wps->dev_password_len = pin_len; 1440 1441 return 0; 1442 } 1443 1444 1445 static int wps_build_uuid_r(struct wps_data *wps, struct wpabuf *msg) 1446 { 1447 wpa_printf(MSG_DEBUG, "WPS: * UUID-R"); 1448 wpabuf_put_be16(msg, ATTR_UUID_R); 1449 wpabuf_put_be16(msg, WPS_UUID_LEN); 1450 wpabuf_put_data(msg, wps->uuid_r, WPS_UUID_LEN); 1451 return 0; 1452 } 1453 1454 1455 static int wps_build_r_hash(struct wps_data *wps, struct wpabuf *msg) 1456 { 1457 u8 *hash; 1458 const u8 *addr[4]; 1459 size_t len[4]; 1460 1461 if (random_get_bytes(wps->snonce, 2 * WPS_SECRET_NONCE_LEN) < 0) 1462 return -1; 1463 wpa_hexdump(MSG_DEBUG, "WPS: R-S1", wps->snonce, WPS_SECRET_NONCE_LEN); 1464 wpa_hexdump(MSG_DEBUG, "WPS: R-S2", 1465 wps->snonce + WPS_SECRET_NONCE_LEN, WPS_SECRET_NONCE_LEN); 1466 1467 if (wps->dh_pubkey_e == NULL || wps->dh_pubkey_r == NULL) { 1468 wpa_printf(MSG_DEBUG, "WPS: DH public keys not available for " 1469 "R-Hash derivation"); 1470 return -1; 1471 } 1472 1473 wpa_printf(MSG_DEBUG, "WPS: * R-Hash1"); 1474 wpabuf_put_be16(msg, ATTR_R_HASH1); 1475 wpabuf_put_be16(msg, SHA256_MAC_LEN); 1476 hash = wpabuf_put(msg, SHA256_MAC_LEN); 1477 /* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */ 1478 addr[0] = wps->snonce; 1479 len[0] = WPS_SECRET_NONCE_LEN; 1480 addr[1] = wps->psk1; 1481 len[1] = WPS_PSK_LEN; 1482 addr[2] = wpabuf_head(wps->dh_pubkey_e); 1483 len[2] = wpabuf_len(wps->dh_pubkey_e); 1484 addr[3] = wpabuf_head(wps->dh_pubkey_r); 1485 len[3] = wpabuf_len(wps->dh_pubkey_r); 1486 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 1487 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash1", hash, SHA256_MAC_LEN); 1488 1489 wpa_printf(MSG_DEBUG, "WPS: * R-Hash2"); 1490 wpabuf_put_be16(msg, ATTR_R_HASH2); 1491 wpabuf_put_be16(msg, SHA256_MAC_LEN); 1492 hash = wpabuf_put(msg, SHA256_MAC_LEN); 1493 /* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */ 1494 addr[0] = wps->snonce + WPS_SECRET_NONCE_LEN; 1495 addr[1] = wps->psk2; 1496 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 1497 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash2", hash, SHA256_MAC_LEN); 1498 1499 return 0; 1500 } 1501 1502 1503 static int wps_build_r_snonce1(struct wps_data *wps, struct wpabuf *msg) 1504 { 1505 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce1"); 1506 wpabuf_put_be16(msg, ATTR_R_SNONCE1); 1507 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN); 1508 wpabuf_put_data(msg, wps->snonce, WPS_SECRET_NONCE_LEN); 1509 return 0; 1510 } 1511 1512 1513 static int wps_build_r_snonce2(struct wps_data *wps, struct wpabuf *msg) 1514 { 1515 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce2"); 1516 wpabuf_put_be16(msg, ATTR_R_SNONCE2); 1517 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN); 1518 wpabuf_put_data(msg, wps->snonce + WPS_SECRET_NONCE_LEN, 1519 WPS_SECRET_NONCE_LEN); 1520 return 0; 1521 } 1522 1523 1524 static int wps_build_cred_network_idx(struct wpabuf *msg, 1525 const struct wps_credential *cred) 1526 { 1527 wpa_printf(MSG_DEBUG, "WPS: * Network Index (1)"); 1528 wpabuf_put_be16(msg, ATTR_NETWORK_INDEX); 1529 wpabuf_put_be16(msg, 1); 1530 wpabuf_put_u8(msg, 1); 1531 return 0; 1532 } 1533 1534 1535 static int wps_build_cred_ssid(struct wpabuf *msg, 1536 const struct wps_credential *cred) 1537 { 1538 wpa_printf(MSG_DEBUG, "WPS: * SSID"); 1539 wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID for Credential", 1540 cred->ssid, cred->ssid_len); 1541 wpabuf_put_be16(msg, ATTR_SSID); 1542 wpabuf_put_be16(msg, cred->ssid_len); 1543 wpabuf_put_data(msg, cred->ssid, cred->ssid_len); 1544 return 0; 1545 } 1546 1547 1548 static int wps_build_cred_auth_type(struct wpabuf *msg, 1549 const struct wps_credential *cred) 1550 { 1551 wpa_printf(MSG_DEBUG, "WPS: * Authentication Type (0x%x)", 1552 cred->auth_type); 1553 wpabuf_put_be16(msg, ATTR_AUTH_TYPE); 1554 wpabuf_put_be16(msg, 2); 1555 wpabuf_put_be16(msg, cred->auth_type); 1556 return 0; 1557 } 1558 1559 1560 static int wps_build_cred_encr_type(struct wpabuf *msg, 1561 const struct wps_credential *cred) 1562 { 1563 wpa_printf(MSG_DEBUG, "WPS: * Encryption Type (0x%x)", 1564 cred->encr_type); 1565 wpabuf_put_be16(msg, ATTR_ENCR_TYPE); 1566 wpabuf_put_be16(msg, 2); 1567 wpabuf_put_be16(msg, cred->encr_type); 1568 return 0; 1569 } 1570 1571 1572 static int wps_build_cred_network_key(struct wpabuf *msg, 1573 const struct wps_credential *cred) 1574 { 1575 wpa_printf(MSG_DEBUG, "WPS: * Network Key (len=%d)", 1576 (int) cred->key_len); 1577 wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key", 1578 cred->key, cred->key_len); 1579 wpabuf_put_be16(msg, ATTR_NETWORK_KEY); 1580 wpabuf_put_be16(msg, cred->key_len); 1581 wpabuf_put_data(msg, cred->key, cred->key_len); 1582 return 0; 1583 } 1584 1585 1586 static int wps_build_credential(struct wpabuf *msg, 1587 const struct wps_credential *cred) 1588 { 1589 if (wps_build_cred_network_idx(msg, cred) || 1590 wps_build_cred_ssid(msg, cred) || 1591 wps_build_cred_auth_type(msg, cred) || 1592 wps_build_cred_encr_type(msg, cred) || 1593 wps_build_cred_network_key(msg, cred) || 1594 wps_build_mac_addr(msg, cred->mac_addr)) 1595 return -1; 1596 return 0; 1597 } 1598 1599 1600 int wps_build_credential_wrap(struct wpabuf *msg, 1601 const struct wps_credential *cred) 1602 { 1603 struct wpabuf *wbuf; 1604 wbuf = wpabuf_alloc(200); 1605 if (wbuf == NULL) 1606 return -1; 1607 if (wps_build_credential(wbuf, cred)) { 1608 wpabuf_clear_free(wbuf); 1609 return -1; 1610 } 1611 wpabuf_put_be16(msg, ATTR_CRED); 1612 wpabuf_put_be16(msg, wpabuf_len(wbuf)); 1613 wpabuf_put_buf(msg, wbuf); 1614 wpabuf_clear_free(wbuf); 1615 return 0; 1616 } 1617 1618 1619 int wps_build_cred(struct wps_data *wps, struct wpabuf *msg) 1620 { 1621 struct wpabuf *cred; 1622 struct wps_registrar *reg = wps->wps->registrar; 1623 const u8 *pskfile_psk; 1624 char hex[65]; 1625 1626 if (wps->wps->registrar->skip_cred_build) 1627 goto skip_cred_build; 1628 1629 wpa_printf(MSG_DEBUG, "WPS: * Credential"); 1630 if (wps->use_cred) { 1631 os_memcpy(&wps->cred, wps->use_cred, sizeof(wps->cred)); 1632 goto use_provided; 1633 } 1634 os_memset(&wps->cred, 0, sizeof(wps->cred)); 1635 1636 if (wps->peer_dev.multi_ap_ext == MULTI_AP_BACKHAUL_STA && 1637 reg->multi_ap_backhaul_ssid_len) { 1638 wpa_printf(MSG_DEBUG, "WPS: Use backhaul STA credentials"); 1639 os_memcpy(wps->cred.ssid, reg->multi_ap_backhaul_ssid, 1640 reg->multi_ap_backhaul_ssid_len); 1641 wps->cred.ssid_len = reg->multi_ap_backhaul_ssid_len; 1642 /* Backhaul is always WPA2PSK */ 1643 wps->cred.auth_type = WPS_AUTH_WPA2PSK; 1644 wps->cred.encr_type = WPS_ENCR_AES; 1645 /* Set MAC address in the Credential to be the Enrollee's MAC 1646 * address 1647 */ 1648 os_memcpy(wps->cred.mac_addr, wps->mac_addr_e, ETH_ALEN); 1649 if (reg->multi_ap_backhaul_network_key) { 1650 os_memcpy(wps->cred.key, 1651 reg->multi_ap_backhaul_network_key, 1652 reg->multi_ap_backhaul_network_key_len); 1653 wps->cred.key_len = 1654 reg->multi_ap_backhaul_network_key_len; 1655 } 1656 goto use_provided; 1657 } 1658 1659 os_memcpy(wps->cred.ssid, wps->wps->ssid, wps->wps->ssid_len); 1660 wps->cred.ssid_len = wps->wps->ssid_len; 1661 1662 /* Select the best authentication and encryption type */ 1663 wpa_printf(MSG_DEBUG, 1664 "WPS: Own auth types 0x%x - masked Enrollee auth types 0x%x", 1665 wps->wps->auth_types, wps->auth_type); 1666 if (wps->auth_type & WPS_AUTH_WPA2PSK) 1667 wps->auth_type = WPS_AUTH_WPA2PSK; 1668 #ifndef CONFIG_NO_TKIP 1669 else if (wps->auth_type & WPS_AUTH_WPAPSK) 1670 wps->auth_type = WPS_AUTH_WPAPSK; 1671 #endif /* CONFIG_NO_TKIP */ 1672 else if (wps->auth_type & WPS_AUTH_OPEN) 1673 wps->auth_type = WPS_AUTH_OPEN; 1674 else { 1675 wpa_printf(MSG_DEBUG, "WPS: Unsupported auth_type 0x%x", 1676 wps->auth_type); 1677 return -1; 1678 } 1679 wps->cred.auth_type = wps->auth_type; 1680 1681 wpa_printf(MSG_DEBUG, 1682 "WPS: Own encr types 0x%x (rsn: 0x%x, wpa: 0x%x) - masked Enrollee encr types 0x%x", 1683 wps->wps->encr_types, wps->wps->encr_types_rsn, 1684 wps->wps->encr_types_wpa, wps->encr_type); 1685 if (wps->wps->ap && wps->auth_type == WPS_AUTH_WPA2PSK) 1686 wps->encr_type &= wps->wps->encr_types_rsn; 1687 else if (wps->wps->ap && wps->auth_type == WPS_AUTH_WPAPSK) 1688 wps->encr_type &= wps->wps->encr_types_wpa; 1689 if (wps->auth_type == WPS_AUTH_WPA2PSK || 1690 wps->auth_type == WPS_AUTH_WPAPSK) { 1691 if (wps->encr_type & WPS_ENCR_AES) 1692 wps->encr_type = WPS_ENCR_AES; 1693 #ifndef CONFIG_NO_TKIP 1694 else if (wps->encr_type & WPS_ENCR_TKIP) 1695 wps->encr_type = WPS_ENCR_TKIP; 1696 #endif /* CONFIG_NO_TKIP */ 1697 else { 1698 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption " 1699 "type for WPA/WPA2"); 1700 return -1; 1701 } 1702 } else { 1703 if (wps->encr_type & WPS_ENCR_NONE) 1704 wps->encr_type = WPS_ENCR_NONE; 1705 #ifdef CONFIG_TESTING_OPTIONS 1706 else if (wps->encr_type & WPS_ENCR_WEP) 1707 wps->encr_type = WPS_ENCR_WEP; 1708 #endif /* CONFIG_TESTING_OPTIONS */ 1709 else { 1710 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption " 1711 "type for non-WPA/WPA2 mode"); 1712 return -1; 1713 } 1714 } 1715 wps->cred.encr_type = wps->encr_type; 1716 /* 1717 * Set MAC address in the Credential to be the Enrollee's MAC address 1718 */ 1719 os_memcpy(wps->cred.mac_addr, wps->mac_addr_e, ETH_ALEN); 1720 1721 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->wps->ap && 1722 !wps->wps->registrar->disable_auto_conf) { 1723 u8 r[16]; 1724 /* Generate a random passphrase */ 1725 if (random_pool_ready() != 1 || 1726 random_get_bytes(r, sizeof(r)) < 0) { 1727 wpa_printf(MSG_INFO, 1728 "WPS: Could not generate random PSK"); 1729 return -1; 1730 } 1731 os_free(wps->new_psk); 1732 wps->new_psk = (u8 *) base64_encode(r, sizeof(r), 1733 &wps->new_psk_len); 1734 if (wps->new_psk == NULL) 1735 return -1; 1736 wps->new_psk_len--; /* remove newline */ 1737 while (wps->new_psk_len && 1738 wps->new_psk[wps->new_psk_len - 1] == '=') 1739 wps->new_psk_len--; 1740 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Generated passphrase", 1741 wps->new_psk, wps->new_psk_len); 1742 os_memcpy(wps->cred.key, wps->new_psk, wps->new_psk_len); 1743 wps->cred.key_len = wps->new_psk_len; 1744 } else if (wps_cp_lookup_pskfile(reg, wps->mac_addr_e, &pskfile_psk)) { 1745 wpa_hexdump_key(MSG_DEBUG, "WPS: Use PSK from wpa_psk_file", 1746 pskfile_psk, PMK_LEN); 1747 wpa_snprintf_hex(hex, sizeof(hex), pskfile_psk, PMK_LEN); 1748 os_memcpy(wps->cred.key, hex, PMK_LEN * 2); 1749 wps->cred.key_len = PMK_LEN * 2; 1750 } else if (!wps->wps->registrar->force_per_enrollee_psk && 1751 wps->use_psk_key && wps->wps->psk_set) { 1752 wpa_printf(MSG_DEBUG, "WPS: Use PSK format for Network Key"); 1753 wpa_snprintf_hex(hex, sizeof(hex), wps->wps->psk, PMK_LEN); 1754 os_memcpy(wps->cred.key, hex, PMK_LEN * 2); 1755 wps->cred.key_len = PMK_LEN * 2; 1756 } else if ((!wps->wps->registrar->force_per_enrollee_psk || 1757 wps->wps->use_passphrase) && wps->wps->network_key) { 1758 wpa_printf(MSG_DEBUG, 1759 "WPS: Use passphrase format for Network key"); 1760 os_memcpy(wps->cred.key, wps->wps->network_key, 1761 wps->wps->network_key_len); 1762 wps->cred.key_len = wps->wps->network_key_len; 1763 } else if (wps->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) { 1764 /* Generate a random per-device PSK */ 1765 os_free(wps->new_psk); 1766 wps->new_psk_len = PMK_LEN; 1767 wps->new_psk = os_malloc(wps->new_psk_len); 1768 if (wps->new_psk == NULL) 1769 return -1; 1770 if (random_pool_ready() != 1 || 1771 random_get_bytes(wps->new_psk, wps->new_psk_len) < 0) { 1772 wpa_printf(MSG_INFO, 1773 "WPS: Could not generate random PSK"); 1774 os_free(wps->new_psk); 1775 wps->new_psk = NULL; 1776 return -1; 1777 } 1778 wpa_hexdump_key(MSG_DEBUG, "WPS: Generated per-device PSK", 1779 wps->new_psk, wps->new_psk_len); 1780 wpa_snprintf_hex(hex, sizeof(hex), wps->new_psk, 1781 wps->new_psk_len); 1782 os_memcpy(wps->cred.key, hex, wps->new_psk_len * 2); 1783 wps->cred.key_len = wps->new_psk_len * 2; 1784 } 1785 1786 use_provided: 1787 #ifdef CONFIG_WPS_TESTING 1788 if (wps_testing_stub_cred) 1789 cred = wpabuf_alloc(200); 1790 else 1791 cred = NULL; 1792 if (cred) { 1793 struct wps_credential stub; 1794 wpa_printf(MSG_DEBUG, "WPS: Add stub credential"); 1795 os_memset(&stub, 0, sizeof(stub)); 1796 os_memcpy(stub.ssid, "stub", 5); 1797 stub.ssid_len = 5; 1798 stub.auth_type = WPS_AUTH_WPA2PSK; 1799 stub.encr_type = WPS_ENCR_AES; 1800 os_memcpy(stub.key, "stub psk", 9); 1801 stub.key_len = 9; 1802 os_memcpy(stub.mac_addr, wps->mac_addr_e, ETH_ALEN); 1803 wps_build_credential(cred, &stub); 1804 wpa_hexdump_buf(MSG_DEBUG, "WPS: Stub Credential", cred); 1805 1806 wpabuf_put_be16(msg, ATTR_CRED); 1807 wpabuf_put_be16(msg, wpabuf_len(cred)); 1808 wpabuf_put_buf(msg, cred); 1809 1810 wpabuf_free(cred); 1811 } 1812 #endif /* CONFIG_WPS_TESTING */ 1813 1814 cred = wpabuf_alloc(200); 1815 if (cred == NULL) 1816 return -1; 1817 1818 if (wps_build_credential(cred, &wps->cred)) { 1819 wpabuf_clear_free(cred); 1820 return -1; 1821 } 1822 1823 wpabuf_put_be16(msg, ATTR_CRED); 1824 wpabuf_put_be16(msg, wpabuf_len(cred)); 1825 wpabuf_put_buf(msg, cred); 1826 wpabuf_clear_free(cred); 1827 1828 skip_cred_build: 1829 if (wps->wps->registrar->extra_cred) { 1830 wpa_printf(MSG_DEBUG, "WPS: * Credential (pre-configured)"); 1831 wpabuf_put_buf(msg, wps->wps->registrar->extra_cred); 1832 } 1833 1834 return 0; 1835 } 1836 1837 1838 static int wps_build_ap_settings(struct wps_data *wps, struct wpabuf *msg) 1839 { 1840 wpa_printf(MSG_DEBUG, "WPS: * AP Settings"); 1841 1842 if (wps_build_credential(msg, &wps->cred)) 1843 return -1; 1844 1845 return 0; 1846 } 1847 1848 1849 static struct wpabuf * wps_build_ap_cred(struct wps_data *wps) 1850 { 1851 struct wpabuf *msg, *plain; 1852 1853 msg = wpabuf_alloc(1000); 1854 if (msg == NULL) 1855 return NULL; 1856 1857 plain = wpabuf_alloc(200); 1858 if (plain == NULL) { 1859 wpabuf_free(msg); 1860 return NULL; 1861 } 1862 1863 if (wps_build_ap_settings(wps, plain)) { 1864 wpabuf_clear_free(plain); 1865 wpabuf_free(msg); 1866 return NULL; 1867 } 1868 1869 wpabuf_put_be16(msg, ATTR_CRED); 1870 wpabuf_put_be16(msg, wpabuf_len(plain)); 1871 wpabuf_put_buf(msg, plain); 1872 wpabuf_clear_free(plain); 1873 1874 return msg; 1875 } 1876 1877 1878 static struct wpabuf * wps_build_m2(struct wps_data *wps) 1879 { 1880 struct wpabuf *msg; 1881 int config_in_m2 = 0; 1882 1883 if (random_get_bytes(wps->nonce_r, WPS_NONCE_LEN) < 0) 1884 return NULL; 1885 wpa_hexdump(MSG_DEBUG, "WPS: Registrar Nonce", 1886 wps->nonce_r, WPS_NONCE_LEN); 1887 wpa_hexdump(MSG_DEBUG, "WPS: UUID-R", wps->uuid_r, WPS_UUID_LEN); 1888 1889 wpa_printf(MSG_DEBUG, "WPS: Building Message M2"); 1890 msg = wpabuf_alloc(1000); 1891 if (msg == NULL) 1892 return NULL; 1893 1894 if (wps_build_version(msg) || 1895 wps_build_msg_type(msg, WPS_M2) || 1896 wps_build_enrollee_nonce(wps, msg) || 1897 wps_build_registrar_nonce(wps, msg) || 1898 wps_build_uuid_r(wps, msg) || 1899 wps_build_public_key(wps, msg) || 1900 wps_derive_keys(wps) || 1901 wps_build_auth_type_flags(wps, msg) || 1902 wps_build_encr_type_flags(wps, msg) || 1903 wps_build_conn_type_flags(wps, msg) || 1904 wps_build_config_methods_r(wps->wps->registrar, msg) || 1905 wps_build_device_attrs(&wps->wps->dev, msg) || 1906 wps_build_rf_bands(&wps->wps->dev, msg, 1907 wps->wps->rf_band_cb(wps->wps->cb_ctx)) || 1908 wps_build_assoc_state(wps, msg) || 1909 wps_build_config_error(msg, WPS_CFG_NO_ERROR) || 1910 wps_build_dev_password_id(msg, wps->dev_pw_id) || 1911 wps_build_os_version(&wps->wps->dev, msg) || 1912 wps_build_wfa_ext(msg, 0, NULL, 0, 0)) { 1913 wpabuf_free(msg); 1914 return NULL; 1915 } 1916 1917 #ifdef CONFIG_WPS_NFC 1918 if (wps->nfc_pw_token && wps->nfc_pw_token->pk_hash_provided_oob && 1919 wps->nfc_pw_token->pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) { 1920 /* 1921 * Use abbreviated handshake since public key hash allowed 1922 * Enrollee to validate our public key similarly to how Enrollee 1923 * public key was validated. There is no need to validate Device 1924 * Password in this case. 1925 */ 1926 struct wpabuf *plain = wpabuf_alloc(500); 1927 if (plain == NULL || 1928 wps_build_cred(wps, plain) || 1929 wps_build_key_wrap_auth(wps, plain) || 1930 wps_build_encr_settings(wps, msg, plain)) { 1931 wpabuf_free(msg); 1932 wpabuf_clear_free(plain); 1933 return NULL; 1934 } 1935 wpabuf_clear_free(plain); 1936 config_in_m2 = 1; 1937 } 1938 #endif /* CONFIG_WPS_NFC */ 1939 1940 if (wps_build_authenticator(wps, msg)) { 1941 wpabuf_free(msg); 1942 return NULL; 1943 } 1944 1945 wps->int_reg = 1; 1946 wps->state = config_in_m2 ? RECV_DONE : RECV_M3; 1947 return msg; 1948 } 1949 1950 1951 static struct wpabuf * wps_build_m2d(struct wps_data *wps) 1952 { 1953 struct wpabuf *msg; 1954 u16 err = wps->config_error; 1955 1956 wpa_printf(MSG_DEBUG, "WPS: Building Message M2D"); 1957 msg = wpabuf_alloc(1000); 1958 if (msg == NULL) 1959 return NULL; 1960 1961 if (wps->wps->ap && wps->wps->ap_setup_locked && 1962 err == WPS_CFG_NO_ERROR) 1963 err = WPS_CFG_SETUP_LOCKED; 1964 1965 if (wps_build_version(msg) || 1966 wps_build_msg_type(msg, WPS_M2D) || 1967 wps_build_enrollee_nonce(wps, msg) || 1968 wps_build_registrar_nonce(wps, msg) || 1969 wps_build_uuid_r(wps, msg) || 1970 wps_build_auth_type_flags(wps, msg) || 1971 wps_build_encr_type_flags(wps, msg) || 1972 wps_build_conn_type_flags(wps, msg) || 1973 wps_build_config_methods_r(wps->wps->registrar, msg) || 1974 wps_build_device_attrs(&wps->wps->dev, msg) || 1975 wps_build_rf_bands(&wps->wps->dev, msg, 1976 wps->wps->rf_band_cb(wps->wps->cb_ctx)) || 1977 wps_build_assoc_state(wps, msg) || 1978 wps_build_config_error(msg, err) || 1979 wps_build_os_version(&wps->wps->dev, msg) || 1980 wps_build_wfa_ext(msg, 0, NULL, 0, 0)) { 1981 wpabuf_free(msg); 1982 return NULL; 1983 } 1984 1985 wps->state = RECV_M2D_ACK; 1986 return msg; 1987 } 1988 1989 1990 static struct wpabuf * wps_build_m4(struct wps_data *wps) 1991 { 1992 struct wpabuf *msg, *plain; 1993 1994 wpa_printf(MSG_DEBUG, "WPS: Building Message M4"); 1995 1996 if (wps_derive_psk(wps, wps->dev_password, wps->dev_password_len) < 0) 1997 return NULL; 1998 1999 plain = wpabuf_alloc(200); 2000 if (plain == NULL) 2001 return NULL; 2002 2003 msg = wpabuf_alloc(1000); 2004 if (msg == NULL) { 2005 wpabuf_free(plain); 2006 return NULL; 2007 } 2008 2009 if (wps_build_version(msg) || 2010 wps_build_msg_type(msg, WPS_M4) || 2011 wps_build_enrollee_nonce(wps, msg) || 2012 wps_build_r_hash(wps, msg) || 2013 wps_build_r_snonce1(wps, plain) || 2014 wps_build_key_wrap_auth(wps, plain) || 2015 wps_build_encr_settings(wps, msg, plain) || 2016 wps_build_wfa_ext(msg, 0, NULL, 0, 0) || 2017 wps_build_authenticator(wps, msg)) { 2018 wpabuf_clear_free(plain); 2019 wpabuf_free(msg); 2020 return NULL; 2021 } 2022 wpabuf_clear_free(plain); 2023 2024 wps->state = RECV_M5; 2025 return msg; 2026 } 2027 2028 2029 static struct wpabuf * wps_build_m6(struct wps_data *wps) 2030 { 2031 struct wpabuf *msg, *plain; 2032 2033 wpa_printf(MSG_DEBUG, "WPS: Building Message M6"); 2034 2035 plain = wpabuf_alloc(200); 2036 if (plain == NULL) 2037 return NULL; 2038 2039 msg = wpabuf_alloc(1000); 2040 if (msg == NULL) { 2041 wpabuf_free(plain); 2042 return NULL; 2043 } 2044 2045 if (wps_build_version(msg) || 2046 wps_build_msg_type(msg, WPS_M6) || 2047 wps_build_enrollee_nonce(wps, msg) || 2048 wps_build_r_snonce2(wps, plain) || 2049 wps_build_key_wrap_auth(wps, plain) || 2050 wps_build_encr_settings(wps, msg, plain) || 2051 wps_build_wfa_ext(msg, 0, NULL, 0, 0) || 2052 wps_build_authenticator(wps, msg)) { 2053 wpabuf_clear_free(plain); 2054 wpabuf_free(msg); 2055 return NULL; 2056 } 2057 wpabuf_clear_free(plain); 2058 2059 wps->wps_pin_revealed = 1; 2060 wps->state = RECV_M7; 2061 return msg; 2062 } 2063 2064 2065 static struct wpabuf * wps_build_m8(struct wps_data *wps) 2066 { 2067 struct wpabuf *msg, *plain; 2068 2069 wpa_printf(MSG_DEBUG, "WPS: Building Message M8"); 2070 2071 plain = wpabuf_alloc(500); 2072 if (plain == NULL) 2073 return NULL; 2074 2075 msg = wpabuf_alloc(1000); 2076 if (msg == NULL) { 2077 wpabuf_free(plain); 2078 return NULL; 2079 } 2080 2081 if (wps_build_version(msg) || 2082 wps_build_msg_type(msg, WPS_M8) || 2083 wps_build_enrollee_nonce(wps, msg) || 2084 ((wps->wps->ap || wps->er) && wps_build_cred(wps, plain)) || 2085 (!wps->wps->ap && !wps->er && wps_build_ap_settings(wps, plain)) || 2086 wps_build_key_wrap_auth(wps, plain) || 2087 wps_build_encr_settings(wps, msg, plain) || 2088 wps_build_wfa_ext(msg, 0, NULL, 0, 0) || 2089 wps_build_authenticator(wps, msg)) { 2090 wpabuf_clear_free(plain); 2091 wpabuf_clear_free(msg); 2092 return NULL; 2093 } 2094 wpabuf_clear_free(plain); 2095 2096 wps->state = RECV_DONE; 2097 return msg; 2098 } 2099 2100 2101 struct wpabuf * wps_registrar_get_msg(struct wps_data *wps, 2102 enum wsc_op_code *op_code) 2103 { 2104 struct wpabuf *msg; 2105 2106 #ifdef CONFIG_WPS_UPNP 2107 if (!wps->int_reg && wps->wps->wps_upnp) { 2108 struct upnp_pending_message *p, *prev = NULL; 2109 if (wps->ext_reg > 1) 2110 wps_registrar_free_pending_m2(wps->wps); 2111 p = wps->wps->upnp_msgs; 2112 /* TODO: check pending message MAC address */ 2113 while (p && p->next) { 2114 prev = p; 2115 p = p->next; 2116 } 2117 if (p) { 2118 wpa_printf(MSG_DEBUG, "WPS: Use pending message from " 2119 "UPnP"); 2120 if (prev) 2121 prev->next = NULL; 2122 else 2123 wps->wps->upnp_msgs = NULL; 2124 msg = p->msg; 2125 switch (p->type) { 2126 case WPS_WSC_ACK: 2127 *op_code = WSC_ACK; 2128 break; 2129 case WPS_WSC_NACK: 2130 *op_code = WSC_NACK; 2131 break; 2132 default: 2133 *op_code = WSC_MSG; 2134 break; 2135 } 2136 os_free(p); 2137 if (wps->ext_reg == 0) 2138 wps->ext_reg = 1; 2139 return msg; 2140 } 2141 } 2142 if (wps->ext_reg) { 2143 wpa_printf(MSG_DEBUG, "WPS: Using external Registrar, but no " 2144 "pending message available"); 2145 return NULL; 2146 } 2147 #endif /* CONFIG_WPS_UPNP */ 2148 2149 switch (wps->state) { 2150 case SEND_M2: 2151 if (wps_get_dev_password(wps) < 0) 2152 msg = wps_build_m2d(wps); 2153 else 2154 msg = wps_build_m2(wps); 2155 *op_code = WSC_MSG; 2156 break; 2157 case SEND_M2D: 2158 msg = wps_build_m2d(wps); 2159 *op_code = WSC_MSG; 2160 break; 2161 case SEND_M4: 2162 msg = wps_build_m4(wps); 2163 *op_code = WSC_MSG; 2164 break; 2165 case SEND_M6: 2166 msg = wps_build_m6(wps); 2167 *op_code = WSC_MSG; 2168 break; 2169 case SEND_M8: 2170 msg = wps_build_m8(wps); 2171 *op_code = WSC_MSG; 2172 break; 2173 case RECV_DONE: 2174 msg = wps_build_wsc_ack(wps); 2175 *op_code = WSC_ACK; 2176 break; 2177 case SEND_WSC_NACK: 2178 msg = wps_build_wsc_nack(wps); 2179 *op_code = WSC_NACK; 2180 break; 2181 default: 2182 wpa_printf(MSG_DEBUG, "WPS: Unsupported state %d for building " 2183 "a message", wps->state); 2184 msg = NULL; 2185 break; 2186 } 2187 2188 if (*op_code == WSC_MSG && msg) { 2189 /* Save a copy of the last message for Authenticator derivation 2190 */ 2191 wpabuf_free(wps->last_msg); 2192 wps->last_msg = wpabuf_dup(msg); 2193 } 2194 2195 return msg; 2196 } 2197 2198 2199 static int wps_process_enrollee_nonce(struct wps_data *wps, const u8 *e_nonce) 2200 { 2201 if (e_nonce == NULL) { 2202 wpa_printf(MSG_DEBUG, "WPS: No Enrollee Nonce received"); 2203 return -1; 2204 } 2205 2206 os_memcpy(wps->nonce_e, e_nonce, WPS_NONCE_LEN); 2207 wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce", 2208 wps->nonce_e, WPS_NONCE_LEN); 2209 2210 return 0; 2211 } 2212 2213 2214 static int wps_process_registrar_nonce(struct wps_data *wps, const u8 *r_nonce) 2215 { 2216 if (r_nonce == NULL) { 2217 wpa_printf(MSG_DEBUG, "WPS: No Registrar Nonce received"); 2218 return -1; 2219 } 2220 2221 if (os_memcmp(wps->nonce_r, r_nonce, WPS_NONCE_LEN) != 0) { 2222 wpa_printf(MSG_DEBUG, "WPS: Invalid Registrar Nonce received"); 2223 return -1; 2224 } 2225 2226 return 0; 2227 } 2228 2229 2230 static int wps_process_uuid_e(struct wps_data *wps, const u8 *uuid_e) 2231 { 2232 if (uuid_e == NULL) { 2233 wpa_printf(MSG_DEBUG, "WPS: No UUID-E received"); 2234 return -1; 2235 } 2236 2237 os_memcpy(wps->uuid_e, uuid_e, WPS_UUID_LEN); 2238 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", wps->uuid_e, WPS_UUID_LEN); 2239 2240 return 0; 2241 } 2242 2243 2244 static int wps_process_dev_password_id(struct wps_data *wps, const u8 *pw_id) 2245 { 2246 if (pw_id == NULL) { 2247 wpa_printf(MSG_DEBUG, "WPS: No Device Password ID received"); 2248 return -1; 2249 } 2250 2251 wps->dev_pw_id = WPA_GET_BE16(pw_id); 2252 wpa_printf(MSG_DEBUG, "WPS: Device Password ID %d", wps->dev_pw_id); 2253 2254 return 0; 2255 } 2256 2257 2258 static int wps_process_e_hash1(struct wps_data *wps, const u8 *e_hash1) 2259 { 2260 if (e_hash1 == NULL) { 2261 wpa_printf(MSG_DEBUG, "WPS: No E-Hash1 received"); 2262 return -1; 2263 } 2264 2265 os_memcpy(wps->peer_hash1, e_hash1, WPS_HASH_LEN); 2266 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash1", wps->peer_hash1, WPS_HASH_LEN); 2267 2268 return 0; 2269 } 2270 2271 2272 static int wps_process_e_hash2(struct wps_data *wps, const u8 *e_hash2) 2273 { 2274 if (e_hash2 == NULL) { 2275 wpa_printf(MSG_DEBUG, "WPS: No E-Hash2 received"); 2276 return -1; 2277 } 2278 2279 os_memcpy(wps->peer_hash2, e_hash2, WPS_HASH_LEN); 2280 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash2", wps->peer_hash2, WPS_HASH_LEN); 2281 2282 return 0; 2283 } 2284 2285 2286 static int wps_process_e_snonce1(struct wps_data *wps, const u8 *e_snonce1) 2287 { 2288 u8 hash[SHA256_MAC_LEN]; 2289 const u8 *addr[4]; 2290 size_t len[4]; 2291 2292 if (e_snonce1 == NULL) { 2293 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce1 received"); 2294 return -1; 2295 } 2296 2297 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce1", e_snonce1, 2298 WPS_SECRET_NONCE_LEN); 2299 2300 /* E-Hash1 = HMAC_AuthKey(E-S1 || PSK1 || PK_E || PK_R) */ 2301 addr[0] = e_snonce1; 2302 len[0] = WPS_SECRET_NONCE_LEN; 2303 addr[1] = wps->psk1; 2304 len[1] = WPS_PSK_LEN; 2305 addr[2] = wpabuf_head(wps->dh_pubkey_e); 2306 len[2] = wpabuf_len(wps->dh_pubkey_e); 2307 addr[3] = wpabuf_head(wps->dh_pubkey_r); 2308 len[3] = wpabuf_len(wps->dh_pubkey_r); 2309 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 2310 2311 if (os_memcmp_const(wps->peer_hash1, hash, WPS_HASH_LEN) != 0) { 2312 wpa_printf(MSG_DEBUG, "WPS: E-Hash1 derived from E-S1 does " 2313 "not match with the pre-committed value"); 2314 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE; 2315 wps_pwd_auth_fail_event(wps->wps, 0, 1, wps->mac_addr_e); 2316 return -1; 2317 } 2318 2319 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the first " 2320 "half of the device password"); 2321 2322 return 0; 2323 } 2324 2325 2326 static int wps_process_e_snonce2(struct wps_data *wps, const u8 *e_snonce2) 2327 { 2328 u8 hash[SHA256_MAC_LEN]; 2329 const u8 *addr[4]; 2330 size_t len[4]; 2331 2332 if (e_snonce2 == NULL) { 2333 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce2 received"); 2334 return -1; 2335 } 2336 2337 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce2", e_snonce2, 2338 WPS_SECRET_NONCE_LEN); 2339 2340 /* E-Hash2 = HMAC_AuthKey(E-S2 || PSK2 || PK_E || PK_R) */ 2341 addr[0] = e_snonce2; 2342 len[0] = WPS_SECRET_NONCE_LEN; 2343 addr[1] = wps->psk2; 2344 len[1] = WPS_PSK_LEN; 2345 addr[2] = wpabuf_head(wps->dh_pubkey_e); 2346 len[2] = wpabuf_len(wps->dh_pubkey_e); 2347 addr[3] = wpabuf_head(wps->dh_pubkey_r); 2348 len[3] = wpabuf_len(wps->dh_pubkey_r); 2349 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 2350 2351 if (os_memcmp_const(wps->peer_hash2, hash, WPS_HASH_LEN) != 0) { 2352 wpa_printf(MSG_DEBUG, "WPS: E-Hash2 derived from E-S2 does " 2353 "not match with the pre-committed value"); 2354 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e); 2355 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE; 2356 wps_pwd_auth_fail_event(wps->wps, 0, 2, wps->mac_addr_e); 2357 return -1; 2358 } 2359 2360 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the second " 2361 "half of the device password"); 2362 wps->wps_pin_revealed = 0; 2363 wps_registrar_unlock_pin(wps->wps->registrar, wps->uuid_e); 2364 2365 /* 2366 * In case wildcard PIN is used and WPS handshake succeeds in the first 2367 * attempt, wps_registrar_unlock_pin() would not free the PIN, so make 2368 * sure the PIN gets invalidated here. 2369 */ 2370 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e); 2371 2372 return 0; 2373 } 2374 2375 2376 static int wps_process_mac_addr(struct wps_data *wps, const u8 *mac_addr) 2377 { 2378 if (mac_addr == NULL) { 2379 wpa_printf(MSG_DEBUG, "WPS: No MAC Address received"); 2380 return -1; 2381 } 2382 2383 wpa_printf(MSG_DEBUG, "WPS: Enrollee MAC Address " MACSTR, 2384 MAC2STR(mac_addr)); 2385 os_memcpy(wps->mac_addr_e, mac_addr, ETH_ALEN); 2386 os_memcpy(wps->peer_dev.mac_addr, mac_addr, ETH_ALEN); 2387 2388 return 0; 2389 } 2390 2391 2392 static int wps_process_pubkey(struct wps_data *wps, const u8 *pk, 2393 size_t pk_len) 2394 { 2395 if (pk == NULL || pk_len == 0) { 2396 wpa_printf(MSG_DEBUG, "WPS: No Public Key received"); 2397 return -1; 2398 } 2399 2400 wpabuf_free(wps->dh_pubkey_e); 2401 wps->dh_pubkey_e = wpabuf_alloc_copy(pk, pk_len); 2402 if (wps->dh_pubkey_e == NULL) 2403 return -1; 2404 2405 return 0; 2406 } 2407 2408 2409 static int wps_process_auth_type_flags(struct wps_data *wps, const u8 *auth) 2410 { 2411 u16 auth_types; 2412 2413 if (auth == NULL) { 2414 wpa_printf(MSG_DEBUG, "WPS: No Authentication Type flags " 2415 "received"); 2416 return -1; 2417 } 2418 2419 auth_types = WPA_GET_BE16(auth); 2420 2421 wpa_printf(MSG_DEBUG, "WPS: Enrollee Authentication Type flags 0x%x", 2422 auth_types); 2423 #ifdef WPS_WORKAROUNDS 2424 /* 2425 * Some deployed implementations seem to advertise incorrect information 2426 * in this attribute. A value of 0x1b (WPA2 + WPA + WPAPSK + OPEN, but 2427 * no WPA2PSK) has been reported to be used. Add WPA2PSK to the list to 2428 * avoid issues with building Credentials that do not use the strongest 2429 * actually supported authentication option (that device does support 2430 * WPA2PSK even when it does not claim it here). 2431 */ 2432 if ((auth_types & 2433 (WPS_AUTH_WPA2 | WPS_AUTH_WPA2PSK | WPS_AUTH_WPAPSK)) == 2434 (WPS_AUTH_WPA2 | WPS_AUTH_WPAPSK)) { 2435 wpa_printf(MSG_DEBUG, 2436 "WPS: Workaround - assume Enrollee supports WPA2PSK based on claimed WPA2 support"); 2437 auth_types |= WPS_AUTH_WPA2PSK; 2438 } 2439 #endif /* WPS_WORKAROUNDS */ 2440 wps->auth_type = wps->wps->auth_types & auth_types; 2441 if (wps->auth_type == 0) { 2442 wpa_printf(MSG_DEBUG, "WPS: No match in supported " 2443 "authentication types (own 0x%x Enrollee 0x%x)", 2444 wps->wps->auth_types, auth_types); 2445 #ifdef WPS_WORKAROUNDS 2446 /* 2447 * Some deployed implementations seem to advertise incorrect 2448 * information in this attribute. For example, Linksys WRT350N 2449 * seems to have a byteorder bug that breaks this negotiation. 2450 * In order to interoperate with existing implementations, 2451 * assume that the Enrollee supports everything we do. 2452 */ 2453 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee " 2454 "does not advertise supported authentication types " 2455 "correctly"); 2456 wps->auth_type = wps->wps->auth_types; 2457 #else /* WPS_WORKAROUNDS */ 2458 return -1; 2459 #endif /* WPS_WORKAROUNDS */ 2460 } 2461 2462 return 0; 2463 } 2464 2465 2466 static int wps_process_encr_type_flags(struct wps_data *wps, const u8 *encr) 2467 { 2468 u16 encr_types; 2469 2470 if (encr == NULL) { 2471 wpa_printf(MSG_DEBUG, "WPS: No Encryption Type flags " 2472 "received"); 2473 return -1; 2474 } 2475 2476 encr_types = WPA_GET_BE16(encr); 2477 2478 wpa_printf(MSG_DEBUG, "WPS: Enrollee Encryption Type flags 0x%x", 2479 encr_types); 2480 wps->encr_type = wps->wps->encr_types & encr_types; 2481 if (wps->encr_type == 0) { 2482 wpa_printf(MSG_DEBUG, "WPS: No match in supported " 2483 "encryption types (own 0x%x Enrollee 0x%x)", 2484 wps->wps->encr_types, encr_types); 2485 #ifdef WPS_WORKAROUNDS 2486 /* 2487 * Some deployed implementations seem to advertise incorrect 2488 * information in this attribute. For example, Linksys WRT350N 2489 * seems to have a byteorder bug that breaks this negotiation. 2490 * In order to interoperate with existing implementations, 2491 * assume that the Enrollee supports everything we do. 2492 */ 2493 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee " 2494 "does not advertise supported encryption types " 2495 "correctly"); 2496 wps->encr_type = wps->wps->encr_types; 2497 #else /* WPS_WORKAROUNDS */ 2498 return -1; 2499 #endif /* WPS_WORKAROUNDS */ 2500 } 2501 2502 return 0; 2503 } 2504 2505 2506 static int wps_process_conn_type_flags(struct wps_data *wps, const u8 *conn) 2507 { 2508 if (conn == NULL) { 2509 wpa_printf(MSG_DEBUG, "WPS: No Connection Type flags " 2510 "received"); 2511 return -1; 2512 } 2513 2514 wpa_printf(MSG_DEBUG, "WPS: Enrollee Connection Type flags 0x%x", 2515 *conn); 2516 2517 return 0; 2518 } 2519 2520 2521 static int wps_process_config_methods(struct wps_data *wps, const u8 *methods) 2522 { 2523 u16 m; 2524 2525 if (methods == NULL) { 2526 wpa_printf(MSG_DEBUG, "WPS: No Config Methods received"); 2527 return -1; 2528 } 2529 2530 m = WPA_GET_BE16(methods); 2531 2532 wpa_printf(MSG_DEBUG, "WPS: Enrollee Config Methods 0x%x" 2533 "%s%s%s%s%s%s%s%s%s", m, 2534 m & WPS_CONFIG_USBA ? " [USBA]" : "", 2535 m & WPS_CONFIG_ETHERNET ? " [Ethernet]" : "", 2536 m & WPS_CONFIG_LABEL ? " [Label]" : "", 2537 m & WPS_CONFIG_DISPLAY ? " [Display]" : "", 2538 m & WPS_CONFIG_EXT_NFC_TOKEN ? " [Ext NFC Token]" : "", 2539 m & WPS_CONFIG_INT_NFC_TOKEN ? " [Int NFC Token]" : "", 2540 m & WPS_CONFIG_NFC_INTERFACE ? " [NFC]" : "", 2541 m & WPS_CONFIG_PUSHBUTTON ? " [PBC]" : "", 2542 m & WPS_CONFIG_KEYPAD ? " [Keypad]" : ""); 2543 2544 if (!(m & WPS_CONFIG_DISPLAY) && !wps->use_psk_key) { 2545 /* 2546 * The Enrollee does not have a display so it is unlikely to be 2547 * able to show the passphrase to a user and as such, could 2548 * benefit from receiving PSK to reduce key derivation time. 2549 */ 2550 wpa_printf(MSG_DEBUG, "WPS: Prefer PSK format key due to " 2551 "Enrollee not supporting display"); 2552 wps->use_psk_key = 1; 2553 } 2554 2555 return 0; 2556 } 2557 2558 2559 static int wps_process_wps_state(struct wps_data *wps, const u8 *state) 2560 { 2561 if (state == NULL) { 2562 wpa_printf(MSG_DEBUG, "WPS: No Wi-Fi Protected Setup State " 2563 "received"); 2564 return -1; 2565 } 2566 2567 wpa_printf(MSG_DEBUG, "WPS: Enrollee Wi-Fi Protected Setup State %d", 2568 *state); 2569 2570 return 0; 2571 } 2572 2573 2574 static int wps_process_assoc_state(struct wps_data *wps, const u8 *assoc) 2575 { 2576 u16 a; 2577 2578 if (assoc == NULL) { 2579 wpa_printf(MSG_DEBUG, "WPS: No Association State received"); 2580 return -1; 2581 } 2582 2583 a = WPA_GET_BE16(assoc); 2584 wpa_printf(MSG_DEBUG, "WPS: Enrollee Association State %d", a); 2585 2586 return 0; 2587 } 2588 2589 2590 static int wps_process_config_error(struct wps_data *wps, const u8 *err) 2591 { 2592 u16 e; 2593 2594 if (err == NULL) { 2595 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error received"); 2596 return -1; 2597 } 2598 2599 e = WPA_GET_BE16(err); 2600 wpa_printf(MSG_DEBUG, "WPS: Enrollee Configuration Error %d", e); 2601 2602 return 0; 2603 } 2604 2605 2606 static int wps_registrar_p2p_dev_addr_match(struct wps_data *wps) 2607 { 2608 #ifdef CONFIG_P2P 2609 struct wps_registrar *reg = wps->wps->registrar; 2610 2611 if (is_zero_ether_addr(reg->p2p_dev_addr)) 2612 return 1; /* no filtering in use */ 2613 2614 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) != 0) { 2615 wpa_printf(MSG_DEBUG, "WPS: No match on P2P Device Address " 2616 "filtering for PBC: expected " MACSTR " was " 2617 MACSTR " - indicate PBC session overlap", 2618 MAC2STR(reg->p2p_dev_addr), 2619 MAC2STR(wps->p2p_dev_addr)); 2620 return 0; 2621 } 2622 #endif /* CONFIG_P2P */ 2623 return 1; 2624 } 2625 2626 2627 static int wps_registrar_skip_overlap(struct wps_data *wps) 2628 { 2629 #ifdef CONFIG_P2P 2630 struct wps_registrar *reg = wps->wps->registrar; 2631 2632 if (is_zero_ether_addr(reg->p2p_dev_addr)) 2633 return 0; /* no specific Enrollee selected */ 2634 2635 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) == 0) { 2636 wpa_printf(MSG_DEBUG, "WPS: Skip PBC overlap due to selected " 2637 "Enrollee match"); 2638 return 1; 2639 } 2640 #endif /* CONFIG_P2P */ 2641 return 0; 2642 } 2643 2644 2645 static enum wps_process_res wps_process_m1(struct wps_data *wps, 2646 struct wps_parse_attr *attr) 2647 { 2648 wpa_printf(MSG_DEBUG, "WPS: Received M1"); 2649 2650 if (wps->state != RECV_M1) { 2651 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2652 "receiving M1", wps->state); 2653 return WPS_FAILURE; 2654 } 2655 2656 if (wps_process_uuid_e(wps, attr->uuid_e) || 2657 wps_process_mac_addr(wps, attr->mac_addr) || 2658 wps_process_enrollee_nonce(wps, attr->enrollee_nonce) || 2659 wps_process_pubkey(wps, attr->public_key, attr->public_key_len) || 2660 wps_process_auth_type_flags(wps, attr->auth_type_flags) || 2661 wps_process_encr_type_flags(wps, attr->encr_type_flags) || 2662 wps_process_conn_type_flags(wps, attr->conn_type_flags) || 2663 wps_process_config_methods(wps, attr->config_methods) || 2664 wps_process_wps_state(wps, attr->wps_state) || 2665 wps_process_device_attrs(&wps->peer_dev, attr) || 2666 wps_process_rf_bands(&wps->peer_dev, attr->rf_bands) || 2667 wps_process_assoc_state(wps, attr->assoc_state) || 2668 wps_process_dev_password_id(wps, attr->dev_password_id) || 2669 wps_process_config_error(wps, attr->config_error) || 2670 wps_process_os_version(&wps->peer_dev, attr->os_version)) 2671 return WPS_FAILURE; 2672 2673 if (wps->dev_pw_id < 0x10 && 2674 wps->dev_pw_id != DEV_PW_DEFAULT && 2675 wps->dev_pw_id != DEV_PW_P2PS_DEFAULT && 2676 wps->dev_pw_id != DEV_PW_USER_SPECIFIED && 2677 wps->dev_pw_id != DEV_PW_MACHINE_SPECIFIED && 2678 wps->dev_pw_id != DEV_PW_REGISTRAR_SPECIFIED && 2679 #ifdef CONFIG_WPS_NFC 2680 wps->dev_pw_id != DEV_PW_NFC_CONNECTION_HANDOVER && 2681 #endif /* CONFIG_WPS_NFC */ 2682 (wps->dev_pw_id != DEV_PW_PUSHBUTTON || 2683 !wps->wps->registrar->pbc)) { 2684 wpa_printf(MSG_DEBUG, "WPS: Unsupported Device Password ID %d", 2685 wps->dev_pw_id); 2686 wps->state = SEND_M2D; 2687 return WPS_CONTINUE; 2688 } 2689 2690 #ifdef CONFIG_WPS_NFC 2691 if (wps->dev_pw_id >= 0x10 || 2692 wps->dev_pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) { 2693 struct wps_nfc_pw_token *token; 2694 const u8 *addr[1]; 2695 u8 hash[WPS_HASH_LEN]; 2696 2697 wpa_printf(MSG_DEBUG, "WPS: Searching for NFC token match for id=%d (ctx %p registrar %p)", 2698 wps->dev_pw_id, wps->wps, wps->wps->registrar); 2699 token = wps_get_nfc_pw_token( 2700 &wps->wps->registrar->nfc_pw_tokens, wps->dev_pw_id); 2701 if (token && token->peer_pk_hash_known) { 2702 size_t len; 2703 2704 wpa_printf(MSG_DEBUG, "WPS: Found matching NFC " 2705 "Password Token"); 2706 dl_list_del(&token->list); 2707 wps->nfc_pw_token = token; 2708 2709 addr[0] = attr->public_key; 2710 len = attr->public_key_len; 2711 sha256_vector(1, addr, &len, hash); 2712 if (os_memcmp_const(hash, 2713 wps->nfc_pw_token->pubkey_hash, 2714 WPS_OOB_PUBKEY_HASH_LEN) != 0) { 2715 wpa_printf(MSG_ERROR, "WPS: Public Key hash " 2716 "mismatch"); 2717 wps->state = SEND_M2D; 2718 wps->config_error = 2719 WPS_CFG_PUBLIC_KEY_HASH_MISMATCH; 2720 return WPS_CONTINUE; 2721 } 2722 } else if (token) { 2723 wpa_printf(MSG_DEBUG, "WPS: Found matching NFC " 2724 "Password Token (no peer PK hash)"); 2725 wps->nfc_pw_token = token; 2726 } else if (wps->dev_pw_id >= 0x10 && 2727 wps->wps->ap_nfc_dev_pw_id == wps->dev_pw_id && 2728 wps->wps->ap_nfc_dev_pw) { 2729 wpa_printf(MSG_DEBUG, "WPS: Found match with own NFC Password Token"); 2730 } 2731 } 2732 #endif /* CONFIG_WPS_NFC */ 2733 2734 if (wps->dev_pw_id == DEV_PW_PUSHBUTTON) { 2735 if ((wps->wps->registrar->force_pbc_overlap || 2736 wps_registrar_pbc_overlap(wps->wps->registrar, 2737 wps->mac_addr_e, wps->uuid_e) || 2738 !wps_registrar_p2p_dev_addr_match(wps)) && 2739 !wps_registrar_skip_overlap(wps)) { 2740 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - deny PBC " 2741 "negotiation"); 2742 wps->state = SEND_M2D; 2743 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2744 wps_pbc_overlap_event(wps->wps); 2745 wps_fail_event(wps->wps, WPS_M1, 2746 WPS_CFG_MULTIPLE_PBC_DETECTED, 2747 WPS_EI_NO_ERROR, wps->mac_addr_e); 2748 wps->wps->registrar->force_pbc_overlap = 1; 2749 return WPS_CONTINUE; 2750 } 2751 wps_registrar_add_pbc_session(wps->wps->registrar, 2752 wps->mac_addr_e, wps->uuid_e); 2753 wps->pbc = 1; 2754 } 2755 2756 #ifdef WPS_WORKAROUNDS 2757 /* 2758 * It looks like Mac OS X 10.6.3 and 10.6.4 do not like Network Key in 2759 * passphrase format. To avoid interop issues, force PSK format to be 2760 * used. 2761 */ 2762 if (!wps->use_psk_key && 2763 wps->peer_dev.manufacturer && 2764 os_strncmp(wps->peer_dev.manufacturer, "Apple ", 6) == 0 && 2765 wps->peer_dev.model_name && 2766 os_strcmp(wps->peer_dev.model_name, "AirPort") == 0) { 2767 wpa_printf(MSG_DEBUG, "WPS: Workaround - Force Network Key in " 2768 "PSK format"); 2769 wps->use_psk_key = 1; 2770 } 2771 #endif /* WPS_WORKAROUNDS */ 2772 wps_process_vendor_ext_m1(&wps->peer_dev, attr->multi_ap_ext); 2773 2774 wps->state = SEND_M2; 2775 return WPS_CONTINUE; 2776 } 2777 2778 2779 static enum wps_process_res wps_process_m3(struct wps_data *wps, 2780 const struct wpabuf *msg, 2781 struct wps_parse_attr *attr) 2782 { 2783 wpa_printf(MSG_DEBUG, "WPS: Received M3"); 2784 2785 if (wps->state != RECV_M3) { 2786 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2787 "receiving M3", wps->state); 2788 wps->state = SEND_WSC_NACK; 2789 return WPS_CONTINUE; 2790 } 2791 2792 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2793 !wps_registrar_skip_overlap(wps)) { 2794 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2795 "session overlap"); 2796 wps->state = SEND_WSC_NACK; 2797 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2798 return WPS_CONTINUE; 2799 } 2800 2801 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2802 wps_process_authenticator(wps, attr->authenticator, msg) || 2803 wps_process_e_hash1(wps, attr->e_hash1) || 2804 wps_process_e_hash2(wps, attr->e_hash2)) { 2805 wps->state = SEND_WSC_NACK; 2806 return WPS_CONTINUE; 2807 } 2808 2809 wps->state = SEND_M4; 2810 return WPS_CONTINUE; 2811 } 2812 2813 2814 static enum wps_process_res wps_process_m5(struct wps_data *wps, 2815 const struct wpabuf *msg, 2816 struct wps_parse_attr *attr) 2817 { 2818 struct wpabuf *decrypted; 2819 struct wps_parse_attr eattr; 2820 2821 wpa_printf(MSG_DEBUG, "WPS: Received M5"); 2822 2823 if (wps->state != RECV_M5) { 2824 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2825 "receiving M5", wps->state); 2826 wps->state = SEND_WSC_NACK; 2827 return WPS_CONTINUE; 2828 } 2829 2830 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2831 !wps_registrar_skip_overlap(wps)) { 2832 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2833 "session overlap"); 2834 wps->state = SEND_WSC_NACK; 2835 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2836 return WPS_CONTINUE; 2837 } 2838 2839 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2840 wps_process_authenticator(wps, attr->authenticator, msg)) { 2841 wps->state = SEND_WSC_NACK; 2842 return WPS_CONTINUE; 2843 } 2844 2845 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings, 2846 attr->encr_settings_len); 2847 if (decrypted == NULL) { 2848 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted " 2849 "Settings attribute"); 2850 wps->state = SEND_WSC_NACK; 2851 return WPS_CONTINUE; 2852 } 2853 2854 if (wps_validate_m5_encr(decrypted, attr->version2 != NULL) < 0) { 2855 wpabuf_clear_free(decrypted); 2856 wps->state = SEND_WSC_NACK; 2857 return WPS_CONTINUE; 2858 } 2859 2860 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings " 2861 "attribute"); 2862 if (wps_parse_msg(decrypted, &eattr) < 0 || 2863 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) || 2864 wps_process_e_snonce1(wps, eattr.e_snonce1)) { 2865 wpabuf_clear_free(decrypted); 2866 wps->state = SEND_WSC_NACK; 2867 return WPS_CONTINUE; 2868 } 2869 wpabuf_clear_free(decrypted); 2870 2871 wps->state = SEND_M6; 2872 return WPS_CONTINUE; 2873 } 2874 2875 2876 static void wps_sta_cred_cb(struct wps_data *wps) 2877 { 2878 /* 2879 * Update credential to only include a single authentication and 2880 * encryption type in case the AP configuration includes more than one 2881 * option. 2882 */ 2883 if (wps->cred.auth_type & WPS_AUTH_WPA2PSK) 2884 wps->cred.auth_type = WPS_AUTH_WPA2PSK; 2885 else if (wps->cred.auth_type & WPS_AUTH_WPAPSK) 2886 wps->cred.auth_type = WPS_AUTH_WPAPSK; 2887 if (wps->cred.encr_type & WPS_ENCR_AES) 2888 wps->cred.encr_type = WPS_ENCR_AES; 2889 else if (wps->cred.encr_type & WPS_ENCR_TKIP) 2890 wps->cred.encr_type = WPS_ENCR_TKIP; 2891 wpa_printf(MSG_DEBUG, "WPS: Update local configuration based on the " 2892 "AP configuration"); 2893 if (wps->wps->cred_cb) 2894 wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred); 2895 } 2896 2897 2898 static void wps_cred_update(struct wps_credential *dst, 2899 struct wps_credential *src) 2900 { 2901 os_memcpy(dst->ssid, src->ssid, sizeof(dst->ssid)); 2902 dst->ssid_len = src->ssid_len; 2903 dst->auth_type = src->auth_type; 2904 dst->encr_type = src->encr_type; 2905 dst->key_idx = src->key_idx; 2906 os_memcpy(dst->key, src->key, sizeof(dst->key)); 2907 dst->key_len = src->key_len; 2908 } 2909 2910 2911 static int wps_process_ap_settings_r(struct wps_data *wps, 2912 struct wps_parse_attr *attr) 2913 { 2914 struct wpabuf *msg; 2915 2916 if (wps->wps->ap || wps->er) 2917 return 0; 2918 2919 /* AP Settings Attributes in M7 when Enrollee is an AP */ 2920 if (wps_process_ap_settings(attr, &wps->cred) < 0) 2921 return -1; 2922 2923 wpa_printf(MSG_INFO, "WPS: Received old AP configuration from AP"); 2924 2925 if (wps->new_ap_settings) { 2926 wpa_printf(MSG_INFO, "WPS: Update AP configuration based on " 2927 "new settings"); 2928 wps_cred_update(&wps->cred, wps->new_ap_settings); 2929 return 0; 2930 } else { 2931 /* 2932 * Use the AP PIN only to receive the current AP settings, not 2933 * to reconfigure the AP. 2934 */ 2935 2936 /* 2937 * Clear selected registrar here since we do not get to 2938 * WSC_Done in this protocol run. 2939 */ 2940 wps_registrar_pin_completed(wps->wps->registrar); 2941 2942 msg = wps_build_ap_cred(wps); 2943 if (msg == NULL) 2944 return -1; 2945 wps->cred.cred_attr = wpabuf_head(msg); 2946 wps->cred.cred_attr_len = wpabuf_len(msg); 2947 2948 if (wps->ap_settings_cb) { 2949 wps->ap_settings_cb(wps->ap_settings_cb_ctx, 2950 &wps->cred); 2951 wpabuf_free(msg); 2952 return 1; 2953 } 2954 wps_sta_cred_cb(wps); 2955 2956 wps->cred.cred_attr = NULL; 2957 wps->cred.cred_attr_len = 0; 2958 wpabuf_free(msg); 2959 2960 return 1; 2961 } 2962 } 2963 2964 2965 static enum wps_process_res wps_process_m7(struct wps_data *wps, 2966 const struct wpabuf *msg, 2967 struct wps_parse_attr *attr) 2968 { 2969 struct wpabuf *decrypted; 2970 struct wps_parse_attr eattr; 2971 2972 wpa_printf(MSG_DEBUG, "WPS: Received M7"); 2973 2974 if (wps->state != RECV_M7) { 2975 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2976 "receiving M7", wps->state); 2977 wps->state = SEND_WSC_NACK; 2978 return WPS_CONTINUE; 2979 } 2980 2981 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2982 !wps_registrar_skip_overlap(wps)) { 2983 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2984 "session overlap"); 2985 wps->state = SEND_WSC_NACK; 2986 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2987 return WPS_CONTINUE; 2988 } 2989 2990 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2991 wps_process_authenticator(wps, attr->authenticator, msg)) { 2992 wps->state = SEND_WSC_NACK; 2993 return WPS_CONTINUE; 2994 } 2995 2996 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings, 2997 attr->encr_settings_len); 2998 if (decrypted == NULL) { 2999 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypt Encrypted " 3000 "Settings attribute"); 3001 wps->state = SEND_WSC_NACK; 3002 return WPS_CONTINUE; 3003 } 3004 3005 if (wps_validate_m7_encr(decrypted, wps->wps->ap || wps->er, 3006 attr->version2 != NULL) < 0) { 3007 wpabuf_clear_free(decrypted); 3008 wps->state = SEND_WSC_NACK; 3009 return WPS_CONTINUE; 3010 } 3011 3012 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings " 3013 "attribute"); 3014 if (wps_parse_msg(decrypted, &eattr) < 0 || 3015 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) || 3016 wps_process_e_snonce2(wps, eattr.e_snonce2) || 3017 wps_process_ap_settings_r(wps, &eattr)) { 3018 wpabuf_clear_free(decrypted); 3019 wps->state = SEND_WSC_NACK; 3020 return WPS_CONTINUE; 3021 } 3022 3023 wpabuf_clear_free(decrypted); 3024 3025 wps->state = SEND_M8; 3026 return WPS_CONTINUE; 3027 } 3028 3029 3030 static enum wps_process_res wps_process_wsc_msg(struct wps_data *wps, 3031 const struct wpabuf *msg) 3032 { 3033 struct wps_parse_attr attr; 3034 enum wps_process_res ret = WPS_CONTINUE; 3035 3036 wpa_printf(MSG_DEBUG, "WPS: Received WSC_MSG"); 3037 3038 if (wps_parse_msg(msg, &attr) < 0) 3039 return WPS_FAILURE; 3040 3041 if (attr.msg_type == NULL) { 3042 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3043 wps->state = SEND_WSC_NACK; 3044 return WPS_CONTINUE; 3045 } 3046 3047 if (*attr.msg_type != WPS_M1 && 3048 (attr.registrar_nonce == NULL || 3049 os_memcmp(wps->nonce_r, attr.registrar_nonce, 3050 WPS_NONCE_LEN) != 0)) { 3051 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3052 return WPS_FAILURE; 3053 } 3054 3055 switch (*attr.msg_type) { 3056 case WPS_M1: 3057 if (wps_validate_m1(msg) < 0) 3058 return WPS_FAILURE; 3059 #ifdef CONFIG_WPS_UPNP 3060 if (wps->wps->wps_upnp && attr.mac_addr) { 3061 /* Remove old pending messages when starting new run */ 3062 wps_free_pending_msgs(wps->wps->upnp_msgs); 3063 wps->wps->upnp_msgs = NULL; 3064 3065 upnp_wps_device_send_wlan_event( 3066 wps->wps->wps_upnp, attr.mac_addr, 3067 UPNP_WPS_WLANEVENT_TYPE_EAP, msg); 3068 } 3069 #endif /* CONFIG_WPS_UPNP */ 3070 ret = wps_process_m1(wps, &attr); 3071 break; 3072 case WPS_M3: 3073 if (wps_validate_m3(msg) < 0) 3074 return WPS_FAILURE; 3075 ret = wps_process_m3(wps, msg, &attr); 3076 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 3077 wps_fail_event(wps->wps, WPS_M3, wps->config_error, 3078 wps->error_indication, wps->mac_addr_e); 3079 break; 3080 case WPS_M5: 3081 if (wps_validate_m5(msg) < 0) 3082 return WPS_FAILURE; 3083 ret = wps_process_m5(wps, msg, &attr); 3084 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 3085 wps_fail_event(wps->wps, WPS_M5, wps->config_error, 3086 wps->error_indication, wps->mac_addr_e); 3087 break; 3088 case WPS_M7: 3089 if (wps_validate_m7(msg) < 0) 3090 return WPS_FAILURE; 3091 ret = wps_process_m7(wps, msg, &attr); 3092 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 3093 wps_fail_event(wps->wps, WPS_M7, wps->config_error, 3094 wps->error_indication, wps->mac_addr_e); 3095 break; 3096 default: 3097 wpa_printf(MSG_DEBUG, "WPS: Unsupported Message Type %d", 3098 *attr.msg_type); 3099 return WPS_FAILURE; 3100 } 3101 3102 if (ret == WPS_CONTINUE) { 3103 /* Save a copy of the last message for Authenticator derivation 3104 */ 3105 wpabuf_free(wps->last_msg); 3106 wps->last_msg = wpabuf_dup(msg); 3107 } 3108 3109 return ret; 3110 } 3111 3112 3113 static enum wps_process_res wps_process_wsc_ack(struct wps_data *wps, 3114 const struct wpabuf *msg) 3115 { 3116 struct wps_parse_attr attr; 3117 3118 wpa_printf(MSG_DEBUG, "WPS: Received WSC_ACK"); 3119 3120 if (wps_parse_msg(msg, &attr) < 0) 3121 return WPS_FAILURE; 3122 3123 if (attr.msg_type == NULL) { 3124 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3125 return WPS_FAILURE; 3126 } 3127 3128 if (*attr.msg_type != WPS_WSC_ACK) { 3129 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 3130 *attr.msg_type); 3131 return WPS_FAILURE; 3132 } 3133 3134 #ifdef CONFIG_WPS_UPNP 3135 if (wps->wps->wps_upnp && wps->ext_reg && wps->state == RECV_M2D_ACK && 3136 upnp_wps_subscribers(wps->wps->wps_upnp)) { 3137 if (wps->wps->upnp_msgs) 3138 return WPS_CONTINUE; 3139 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an " 3140 "external Registrar"); 3141 return WPS_PENDING; 3142 } 3143 #endif /* CONFIG_WPS_UPNP */ 3144 3145 if (attr.registrar_nonce == NULL || 3146 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 3147 { 3148 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3149 return WPS_FAILURE; 3150 } 3151 3152 if (attr.enrollee_nonce == NULL || 3153 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 3154 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 3155 return WPS_FAILURE; 3156 } 3157 3158 if (wps->state == RECV_M2D_ACK) { 3159 #ifdef CONFIG_WPS_UPNP 3160 if (wps->wps->wps_upnp && 3161 upnp_wps_subscribers(wps->wps->wps_upnp)) { 3162 if (wps->wps->upnp_msgs) 3163 return WPS_CONTINUE; 3164 if (wps->ext_reg == 0) 3165 wps->ext_reg = 1; 3166 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an " 3167 "external Registrar"); 3168 return WPS_PENDING; 3169 } 3170 #endif /* CONFIG_WPS_UPNP */ 3171 3172 wpa_printf(MSG_DEBUG, "WPS: No more registrars available - " 3173 "terminate negotiation"); 3174 } 3175 3176 return WPS_FAILURE; 3177 } 3178 3179 3180 static enum wps_process_res wps_process_wsc_nack(struct wps_data *wps, 3181 const struct wpabuf *msg) 3182 { 3183 struct wps_parse_attr attr; 3184 int old_state; 3185 u16 config_error; 3186 3187 wpa_printf(MSG_DEBUG, "WPS: Received WSC_NACK"); 3188 3189 old_state = wps->state; 3190 wps->state = SEND_WSC_NACK; 3191 3192 if (wps_parse_msg(msg, &attr) < 0) 3193 return WPS_FAILURE; 3194 3195 if (attr.msg_type == NULL) { 3196 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3197 return WPS_FAILURE; 3198 } 3199 3200 if (*attr.msg_type != WPS_WSC_NACK) { 3201 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 3202 *attr.msg_type); 3203 return WPS_FAILURE; 3204 } 3205 3206 #ifdef CONFIG_WPS_UPNP 3207 if (wps->wps->wps_upnp && wps->ext_reg) { 3208 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external " 3209 "Registrar terminated by the Enrollee"); 3210 return WPS_FAILURE; 3211 } 3212 #endif /* CONFIG_WPS_UPNP */ 3213 3214 if (attr.registrar_nonce == NULL || 3215 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 3216 { 3217 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3218 return WPS_FAILURE; 3219 } 3220 3221 if (attr.enrollee_nonce == NULL || 3222 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 3223 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 3224 return WPS_FAILURE; 3225 } 3226 3227 if (attr.config_error == NULL) { 3228 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error attribute " 3229 "in WSC_NACK"); 3230 return WPS_FAILURE; 3231 } 3232 3233 config_error = WPA_GET_BE16(attr.config_error); 3234 wpa_printf(MSG_DEBUG, "WPS: Enrollee terminated negotiation with " 3235 "Configuration Error %d", config_error); 3236 3237 switch (old_state) { 3238 case RECV_M3: 3239 wps_fail_event(wps->wps, WPS_M2, config_error, 3240 wps->error_indication, wps->mac_addr_e); 3241 break; 3242 case RECV_M5: 3243 wps_fail_event(wps->wps, WPS_M4, config_error, 3244 wps->error_indication, wps->mac_addr_e); 3245 break; 3246 case RECV_M7: 3247 wps_fail_event(wps->wps, WPS_M6, config_error, 3248 wps->error_indication, wps->mac_addr_e); 3249 break; 3250 case RECV_DONE: 3251 wps_fail_event(wps->wps, WPS_M8, config_error, 3252 wps->error_indication, wps->mac_addr_e); 3253 break; 3254 default: 3255 break; 3256 } 3257 3258 return WPS_FAILURE; 3259 } 3260 3261 3262 static enum wps_process_res wps_process_wsc_done(struct wps_data *wps, 3263 const struct wpabuf *msg) 3264 { 3265 struct wps_parse_attr attr; 3266 3267 wpa_printf(MSG_DEBUG, "WPS: Received WSC_Done"); 3268 3269 if (wps->state != RECV_DONE && 3270 (!wps->wps->wps_upnp || !wps->ext_reg)) { 3271 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 3272 "receiving WSC_Done", wps->state); 3273 return WPS_FAILURE; 3274 } 3275 3276 if (wps_parse_msg(msg, &attr) < 0) 3277 return WPS_FAILURE; 3278 3279 if (attr.msg_type == NULL) { 3280 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3281 return WPS_FAILURE; 3282 } 3283 3284 if (*attr.msg_type != WPS_WSC_DONE) { 3285 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 3286 *attr.msg_type); 3287 return WPS_FAILURE; 3288 } 3289 3290 #ifdef CONFIG_WPS_UPNP 3291 if (wps->wps->wps_upnp && wps->ext_reg) { 3292 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external " 3293 "Registrar completed successfully"); 3294 wps_device_store(wps->wps->registrar, &wps->peer_dev, 3295 wps->uuid_e); 3296 return WPS_DONE; 3297 } 3298 #endif /* CONFIG_WPS_UPNP */ 3299 3300 if (attr.registrar_nonce == NULL || 3301 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 3302 { 3303 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3304 return WPS_FAILURE; 3305 } 3306 3307 if (attr.enrollee_nonce == NULL || 3308 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 3309 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 3310 return WPS_FAILURE; 3311 } 3312 3313 wpa_printf(MSG_DEBUG, "WPS: Negotiation completed successfully"); 3314 wps_device_store(wps->wps->registrar, &wps->peer_dev, 3315 wps->uuid_e); 3316 3317 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->new_psk && 3318 wps->wps->ap && !wps->wps->registrar->disable_auto_conf) { 3319 struct wps_credential cred; 3320 3321 wpa_printf(MSG_DEBUG, "WPS: Moving to Configured state based " 3322 "on first Enrollee connection"); 3323 3324 os_memset(&cred, 0, sizeof(cred)); 3325 os_memcpy(cred.ssid, wps->wps->ssid, wps->wps->ssid_len); 3326 cred.ssid_len = wps->wps->ssid_len; 3327 if (wps->wps->rf_band_cb(wps->wps->cb_ctx) == WPS_RF_60GHZ) { 3328 cred.auth_type = WPS_AUTH_WPA2PSK; 3329 cred.encr_type = WPS_ENCR_AES; 3330 } else { 3331 cred.auth_type = WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK; 3332 cred.encr_type = WPS_ENCR_TKIP | WPS_ENCR_AES; 3333 } 3334 os_memcpy(cred.key, wps->new_psk, wps->new_psk_len); 3335 cred.key_len = wps->new_psk_len; 3336 3337 wps->wps->wps_state = WPS_STATE_CONFIGURED; 3338 wpa_hexdump_ascii_key(MSG_DEBUG, 3339 "WPS: Generated random passphrase", 3340 wps->new_psk, wps->new_psk_len); 3341 if (wps->wps->cred_cb) 3342 wps->wps->cred_cb(wps->wps->cb_ctx, &cred); 3343 3344 os_free(wps->new_psk); 3345 wps->new_psk = NULL; 3346 } 3347 3348 if (!wps->wps->ap && !wps->er) 3349 wps_sta_cred_cb(wps); 3350 3351 if (wps->new_psk) { 3352 if (wps_cb_new_psk(wps->wps->registrar, wps->mac_addr_e, 3353 wps->p2p_dev_addr, wps->new_psk, 3354 wps->new_psk_len)) { 3355 wpa_printf(MSG_DEBUG, "WPS: Failed to configure the " 3356 "new PSK"); 3357 } 3358 os_free(wps->new_psk); 3359 wps->new_psk = NULL; 3360 } 3361 3362 wps_cb_reg_success(wps->wps->registrar, wps->mac_addr_e, wps->uuid_e, 3363 wps->dev_password, wps->dev_password_len); 3364 3365 if (wps->pbc) { 3366 wps_registrar_remove_pbc_session(wps->wps->registrar, 3367 wps->uuid_e, 3368 wps->p2p_dev_addr); 3369 wps_registrar_pbc_completed(wps->wps->registrar); 3370 #ifdef WPS_WORKAROUNDS 3371 os_get_reltime(&wps->wps->registrar->pbc_ignore_start); 3372 #endif /* WPS_WORKAROUNDS */ 3373 os_memcpy(wps->wps->registrar->pbc_ignore_uuid, wps->uuid_e, 3374 WPS_UUID_LEN); 3375 } else { 3376 wps_registrar_pin_completed(wps->wps->registrar); 3377 } 3378 /* TODO: maintain AuthorizedMACs somewhere separately for each ER and 3379 * merge them into APs own list.. */ 3380 3381 wps_success_event(wps->wps, wps->mac_addr_e); 3382 3383 return WPS_DONE; 3384 } 3385 3386 3387 enum wps_process_res wps_registrar_process_msg(struct wps_data *wps, 3388 enum wsc_op_code op_code, 3389 const struct wpabuf *msg) 3390 { 3391 enum wps_process_res ret; 3392 3393 wpa_printf(MSG_DEBUG, "WPS: Processing received message (len=%lu " 3394 "op_code=%d)", 3395 (unsigned long) wpabuf_len(msg), op_code); 3396 3397 #ifdef CONFIG_WPS_UPNP 3398 if (wps->wps->wps_upnp && op_code == WSC_MSG && wps->ext_reg == 1) { 3399 struct wps_parse_attr attr; 3400 if (wps_parse_msg(msg, &attr) == 0 && attr.msg_type && 3401 *attr.msg_type == WPS_M3) 3402 wps->ext_reg = 2; /* past M2/M2D phase */ 3403 } 3404 if (wps->ext_reg > 1) 3405 wps_registrar_free_pending_m2(wps->wps); 3406 if (wps->wps->wps_upnp && wps->ext_reg && 3407 wps->wps->upnp_msgs == NULL && 3408 (op_code == WSC_MSG || op_code == WSC_Done || op_code == WSC_NACK)) 3409 { 3410 struct wps_parse_attr attr; 3411 int type; 3412 if (wps_parse_msg(msg, &attr) < 0 || attr.msg_type == NULL) 3413 type = -1; 3414 else 3415 type = *attr.msg_type; 3416 wpa_printf(MSG_DEBUG, "WPS: Sending received message (type %d)" 3417 " to external Registrar for processing", type); 3418 upnp_wps_device_send_wlan_event(wps->wps->wps_upnp, 3419 wps->mac_addr_e, 3420 UPNP_WPS_WLANEVENT_TYPE_EAP, 3421 msg); 3422 if (op_code == WSC_MSG) 3423 return WPS_PENDING; 3424 } else if (wps->wps->wps_upnp && wps->ext_reg && op_code == WSC_MSG) { 3425 wpa_printf(MSG_DEBUG, "WPS: Skip internal processing - using " 3426 "external Registrar"); 3427 return WPS_CONTINUE; 3428 } 3429 #endif /* CONFIG_WPS_UPNP */ 3430 3431 switch (op_code) { 3432 case WSC_MSG: 3433 return wps_process_wsc_msg(wps, msg); 3434 case WSC_ACK: 3435 if (wps_validate_wsc_ack(msg) < 0) 3436 return WPS_FAILURE; 3437 return wps_process_wsc_ack(wps, msg); 3438 case WSC_NACK: 3439 if (wps_validate_wsc_nack(msg) < 0) 3440 return WPS_FAILURE; 3441 return wps_process_wsc_nack(wps, msg); 3442 case WSC_Done: 3443 if (wps_validate_wsc_done(msg) < 0) 3444 return WPS_FAILURE; 3445 ret = wps_process_wsc_done(wps, msg); 3446 if (ret == WPS_FAILURE) { 3447 wps->state = SEND_WSC_NACK; 3448 wps_fail_event(wps->wps, WPS_WSC_DONE, 3449 wps->config_error, 3450 wps->error_indication, wps->mac_addr_e); 3451 } 3452 return ret; 3453 default: 3454 wpa_printf(MSG_DEBUG, "WPS: Unsupported op_code %d", op_code); 3455 return WPS_FAILURE; 3456 } 3457 } 3458 3459 3460 int wps_registrar_update_ie(struct wps_registrar *reg) 3461 { 3462 return wps_set_ie(reg); 3463 } 3464 3465 3466 static void wps_registrar_set_selected_timeout(void *eloop_ctx, 3467 void *timeout_ctx) 3468 { 3469 struct wps_registrar *reg = eloop_ctx; 3470 3471 wpa_printf(MSG_DEBUG, "WPS: Selected Registrar timeout - " 3472 "unselect internal Registrar"); 3473 reg->selected_registrar = 0; 3474 reg->pbc = 0; 3475 wps_registrar_expire_pins(reg); 3476 wps_registrar_selected_registrar_changed(reg, 0); 3477 } 3478 3479 3480 #ifdef CONFIG_WPS_UPNP 3481 static void wps_registrar_sel_reg_add(struct wps_registrar *reg, 3482 struct subscription *s) 3483 { 3484 int i, j; 3485 wpa_printf(MSG_DEBUG, "WPS: External Registrar selected (dev_pw_id=%d " 3486 "config_methods=0x%x)", 3487 s->dev_password_id, s->config_methods); 3488 reg->sel_reg_union = 1; 3489 if (reg->sel_reg_dev_password_id_override != DEV_PW_PUSHBUTTON) 3490 reg->sel_reg_dev_password_id_override = s->dev_password_id; 3491 if (reg->sel_reg_config_methods_override == -1) 3492 reg->sel_reg_config_methods_override = 0; 3493 reg->sel_reg_config_methods_override |= s->config_methods; 3494 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) 3495 if (is_zero_ether_addr(reg->authorized_macs_union[i])) 3496 break; 3497 for (j = 0; i < WPS_MAX_AUTHORIZED_MACS && j < WPS_MAX_AUTHORIZED_MACS; 3498 j++) { 3499 if (is_zero_ether_addr(s->authorized_macs[j])) 3500 break; 3501 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC into union: " 3502 MACSTR, MAC2STR(s->authorized_macs[j])); 3503 os_memcpy(reg->authorized_macs_union[i], 3504 s->authorized_macs[j], ETH_ALEN); 3505 i++; 3506 } 3507 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union", 3508 (u8 *) reg->authorized_macs_union, 3509 sizeof(reg->authorized_macs_union)); 3510 } 3511 #endif /* CONFIG_WPS_UPNP */ 3512 3513 3514 static void wps_registrar_sel_reg_union(struct wps_registrar *reg) 3515 { 3516 #ifdef CONFIG_WPS_UPNP 3517 struct subscription *s; 3518 3519 if (reg->wps->wps_upnp == NULL) 3520 return; 3521 3522 dl_list_for_each(s, ®->wps->wps_upnp->subscriptions, 3523 struct subscription, list) { 3524 struct subscr_addr *sa; 3525 sa = dl_list_first(&s->addr_list, struct subscr_addr, list); 3526 if (sa) { 3527 wpa_printf(MSG_DEBUG, "WPS: External Registrar %s:%d", 3528 inet_ntoa(sa->saddr.sin_addr), 3529 ntohs(sa->saddr.sin_port)); 3530 } 3531 if (s->selected_registrar) 3532 wps_registrar_sel_reg_add(reg, s); 3533 else 3534 wpa_printf(MSG_DEBUG, "WPS: External Registrar not " 3535 "selected"); 3536 } 3537 #endif /* CONFIG_WPS_UPNP */ 3538 } 3539 3540 3541 /** 3542 * wps_registrar_selected_registrar_changed - SetSelectedRegistrar change 3543 * @reg: Registrar data from wps_registrar_init() 3544 * 3545 * This function is called when selected registrar state changes, e.g., when an 3546 * AP receives a SetSelectedRegistrar UPnP message. 3547 */ 3548 void wps_registrar_selected_registrar_changed(struct wps_registrar *reg, 3549 u16 dev_pw_id) 3550 { 3551 wpa_printf(MSG_DEBUG, "WPS: Selected registrar information changed"); 3552 3553 reg->sel_reg_union = reg->selected_registrar; 3554 reg->sel_reg_dev_password_id_override = -1; 3555 reg->sel_reg_config_methods_override = -1; 3556 os_memcpy(reg->authorized_macs_union, reg->authorized_macs, 3557 WPS_MAX_AUTHORIZED_MACS * ETH_ALEN); 3558 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union (start with own)", 3559 (u8 *) reg->authorized_macs_union, 3560 sizeof(reg->authorized_macs_union)); 3561 if (reg->selected_registrar) { 3562 u16 methods; 3563 3564 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 3565 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 3566 WPS_CONFIG_PHY_PUSHBUTTON); 3567 if (reg->pbc) { 3568 reg->sel_reg_dev_password_id_override = 3569 DEV_PW_PUSHBUTTON; 3570 wps_set_pushbutton(&methods, reg->wps->config_methods); 3571 } else if (dev_pw_id) 3572 reg->sel_reg_dev_password_id_override = dev_pw_id; 3573 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar selected " 3574 "(pbc=%d)", reg->pbc); 3575 reg->sel_reg_config_methods_override = methods; 3576 } else 3577 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar not selected"); 3578 3579 wps_registrar_sel_reg_union(reg); 3580 3581 wps_set_ie(reg); 3582 wps_cb_set_sel_reg(reg); 3583 } 3584 3585 3586 int wps_registrar_get_info(struct wps_registrar *reg, const u8 *addr, 3587 char *buf, size_t buflen) 3588 { 3589 struct wps_registrar_device *d; 3590 int len = 0, ret; 3591 char uuid[40]; 3592 char devtype[WPS_DEV_TYPE_BUFSIZE]; 3593 3594 d = wps_device_get(reg, addr); 3595 if (d == NULL) 3596 return 0; 3597 if (uuid_bin2str(d->uuid, uuid, sizeof(uuid))) 3598 return 0; 3599 3600 ret = os_snprintf(buf + len, buflen - len, 3601 "wpsUuid=%s\n" 3602 "wpsPrimaryDeviceType=%s\n" 3603 "wpsDeviceName=%s\n" 3604 "wpsManufacturer=%s\n" 3605 "wpsModelName=%s\n" 3606 "wpsModelNumber=%s\n" 3607 "wpsSerialNumber=%s\n", 3608 uuid, 3609 wps_dev_type_bin2str(d->dev.pri_dev_type, devtype, 3610 sizeof(devtype)), 3611 d->dev.device_name ? d->dev.device_name : "", 3612 d->dev.manufacturer ? d->dev.manufacturer : "", 3613 d->dev.model_name ? d->dev.model_name : "", 3614 d->dev.model_number ? d->dev.model_number : "", 3615 d->dev.serial_number ? d->dev.serial_number : ""); 3616 if (os_snprintf_error(buflen - len, ret)) 3617 return len; 3618 len += ret; 3619 3620 return len; 3621 } 3622 3623 3624 int wps_registrar_config_ap(struct wps_registrar *reg, 3625 struct wps_credential *cred) 3626 { 3627 wpa_printf(MSG_DEBUG, "WPS: encr_type=0x%x", cred->encr_type); 3628 if (!(cred->encr_type & (WPS_ENCR_NONE | WPS_ENCR_TKIP | 3629 WPS_ENCR_AES))) { 3630 if (cred->encr_type & WPS_ENCR_WEP) { 3631 wpa_printf(MSG_INFO, "WPS: Reject new AP settings " 3632 "due to WEP configuration"); 3633 return -1; 3634 } 3635 3636 wpa_printf(MSG_INFO, "WPS: Reject new AP settings due to " 3637 "invalid encr_type 0x%x", cred->encr_type); 3638 return -1; 3639 } 3640 3641 if ((cred->encr_type & (WPS_ENCR_TKIP | WPS_ENCR_AES)) == 3642 WPS_ENCR_TKIP) { 3643 wpa_printf(MSG_DEBUG, "WPS: Upgrade encr_type TKIP -> " 3644 "TKIP+AES"); 3645 cred->encr_type |= WPS_ENCR_AES; 3646 } 3647 3648 if ((cred->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) == 3649 WPS_AUTH_WPAPSK) { 3650 wpa_printf(MSG_DEBUG, "WPS: Upgrade auth_type WPAPSK -> " 3651 "WPAPSK+WPA2PSK"); 3652 cred->auth_type |= WPS_AUTH_WPA2PSK; 3653 } 3654 3655 if (reg->wps->cred_cb) 3656 return reg->wps->cred_cb(reg->wps->cb_ctx, cred); 3657 3658 return -1; 3659 } 3660 3661 3662 int wps_registrar_update_multi_ap(struct wps_registrar *reg, 3663 const u8 *multi_ap_backhaul_ssid, 3664 size_t multi_ap_backhaul_ssid_len, 3665 const u8 *multi_ap_backhaul_network_key, 3666 size_t multi_ap_backhaul_network_key_len) 3667 { 3668 if (multi_ap_backhaul_ssid) { 3669 os_memcpy(reg->multi_ap_backhaul_ssid, 3670 multi_ap_backhaul_ssid, multi_ap_backhaul_ssid_len); 3671 reg->multi_ap_backhaul_ssid_len = multi_ap_backhaul_ssid_len; 3672 } 3673 3674 os_free(reg->multi_ap_backhaul_network_key); 3675 reg->multi_ap_backhaul_network_key = NULL; 3676 reg->multi_ap_backhaul_network_key_len = 0; 3677 if (multi_ap_backhaul_network_key) { 3678 reg->multi_ap_backhaul_network_key = 3679 os_memdup(multi_ap_backhaul_network_key, 3680 multi_ap_backhaul_network_key_len); 3681 if (!reg->multi_ap_backhaul_network_key) 3682 return -1; 3683 reg->multi_ap_backhaul_network_key_len = 3684 multi_ap_backhaul_network_key_len; 3685 } 3686 3687 return 0; 3688 } 3689 3690 3691 #ifdef CONFIG_WPS_NFC 3692 3693 int wps_registrar_add_nfc_pw_token(struct wps_registrar *reg, 3694 const u8 *pubkey_hash, u16 pw_id, 3695 const u8 *dev_pw, size_t dev_pw_len, 3696 int pk_hash_provided_oob) 3697 { 3698 struct wps_nfc_pw_token *token; 3699 3700 if (dev_pw_len > WPS_OOB_DEVICE_PASSWORD_LEN) 3701 return -1; 3702 3703 if (pw_id == DEV_PW_NFC_CONNECTION_HANDOVER && 3704 (pubkey_hash == NULL || !pk_hash_provided_oob)) { 3705 wpa_printf(MSG_DEBUG, "WPS: Unexpected NFC Password Token " 3706 "addition - missing public key hash"); 3707 return -1; 3708 } 3709 3710 wps_free_nfc_pw_tokens(®->nfc_pw_tokens, pw_id); 3711 3712 token = os_zalloc(sizeof(*token)); 3713 if (token == NULL) 3714 return -1; 3715 3716 token->peer_pk_hash_known = pubkey_hash != NULL; 3717 if (pubkey_hash) 3718 os_memcpy(token->pubkey_hash, pubkey_hash, 3719 WPS_OOB_PUBKEY_HASH_LEN); 3720 token->pw_id = pw_id; 3721 token->pk_hash_provided_oob = pk_hash_provided_oob; 3722 if (dev_pw) { 3723 wpa_snprintf_hex_uppercase((char *) token->dev_pw, 3724 sizeof(token->dev_pw), 3725 dev_pw, dev_pw_len); 3726 token->dev_pw_len = dev_pw_len * 2; 3727 } 3728 3729 dl_list_add(®->nfc_pw_tokens, &token->list); 3730 3731 reg->selected_registrar = 1; 3732 reg->pbc = 0; 3733 wps_registrar_add_authorized_mac(reg, 3734 (u8 *) "\xff\xff\xff\xff\xff\xff"); 3735 wps_registrar_selected_registrar_changed(reg, pw_id); 3736 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 3737 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, 3738 wps_registrar_set_selected_timeout, 3739 reg, NULL); 3740 3741 wpa_printf(MSG_DEBUG, "WPS: Added NFC Device Password %u to Registrar", 3742 pw_id); 3743 3744 return 0; 3745 } 3746 3747 3748 int wps_registrar_add_nfc_password_token(struct wps_registrar *reg, 3749 const u8 *oob_dev_pw, 3750 size_t oob_dev_pw_len) 3751 { 3752 const u8 *pos, *hash, *dev_pw; 3753 u16 id; 3754 size_t dev_pw_len; 3755 3756 if (oob_dev_pw_len < WPS_OOB_PUBKEY_HASH_LEN + 2 || 3757 oob_dev_pw_len > WPS_OOB_PUBKEY_HASH_LEN + 2 + 3758 WPS_OOB_DEVICE_PASSWORD_LEN) 3759 return -1; 3760 3761 hash = oob_dev_pw; 3762 pos = oob_dev_pw + WPS_OOB_PUBKEY_HASH_LEN; 3763 id = WPA_GET_BE16(pos); 3764 dev_pw = pos + 2; 3765 dev_pw_len = oob_dev_pw + oob_dev_pw_len - dev_pw; 3766 3767 wpa_printf(MSG_DEBUG, "WPS: Add NFC Password Token for Password ID %u", 3768 id); 3769 3770 wpa_hexdump(MSG_DEBUG, "WPS: Public Key Hash", 3771 hash, WPS_OOB_PUBKEY_HASH_LEN); 3772 wpa_hexdump_key(MSG_DEBUG, "WPS: Device Password", dev_pw, dev_pw_len); 3773 3774 return wps_registrar_add_nfc_pw_token(reg, hash, id, dev_pw, 3775 dev_pw_len, 0); 3776 } 3777 3778 3779 void wps_registrar_remove_nfc_pw_token(struct wps_registrar *reg, 3780 struct wps_nfc_pw_token *token) 3781 { 3782 wps_registrar_remove_authorized_mac(reg, 3783 (u8 *) "\xff\xff\xff\xff\xff\xff"); 3784 wps_registrar_selected_registrar_changed(reg, 0); 3785 3786 /* 3787 * Free the NFC password token if it was used only for a single protocol 3788 * run. The static handover case uses the same password token multiple 3789 * times, so do not free that case here. 3790 */ 3791 if (token->peer_pk_hash_known) 3792 os_free(token); 3793 } 3794 3795 #endif /* CONFIG_WPS_NFC */ 3796