wps_registrar.c revision fb79edc9df1f20461e90e478363d207348213d35
1/* 2 * Wi-Fi Protected Setup - Registrar 3 * Copyright (c) 2008-2013, Jouni Malinen <j@w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9#include "utils/includes.h" 10 11#include "utils/common.h" 12#include "utils/base64.h" 13#include "utils/eloop.h" 14#include "utils/uuid.h" 15#include "utils/list.h" 16#include "crypto/crypto.h" 17#include "crypto/sha256.h" 18#include "crypto/random.h" 19#include "common/ieee802_11_defs.h" 20#include "wps_i.h" 21#include "wps_dev_attr.h" 22#include "wps_upnp.h" 23#include "wps_upnp_i.h" 24 25#ifndef CONFIG_WPS_STRICT 26#define WPS_WORKAROUNDS 27#endif /* CONFIG_WPS_STRICT */ 28 29#ifdef CONFIG_WPS_NFC 30 31struct wps_nfc_pw_token { 32 struct dl_list list; 33 u8 pubkey_hash[WPS_OOB_PUBKEY_HASH_LEN]; 34 u16 pw_id; 35 u8 dev_pw[WPS_OOB_DEVICE_PASSWORD_LEN * 2 + 1]; 36 size_t dev_pw_len; 37}; 38 39 40static void wps_remove_nfc_pw_token(struct wps_nfc_pw_token *token) 41{ 42 dl_list_del(&token->list); 43 os_free(token); 44} 45 46 47static void wps_free_nfc_pw_tokens(struct dl_list *tokens, u16 pw_id) 48{ 49 struct wps_nfc_pw_token *token, *prev; 50 dl_list_for_each_safe(token, prev, tokens, struct wps_nfc_pw_token, 51 list) { 52 if (pw_id == 0 || pw_id == token->pw_id) 53 wps_remove_nfc_pw_token(token); 54 } 55} 56 57 58static struct wps_nfc_pw_token * wps_get_nfc_pw_token(struct dl_list *tokens, 59 u16 pw_id) 60{ 61 struct wps_nfc_pw_token *token; 62 dl_list_for_each(token, tokens, struct wps_nfc_pw_token, list) { 63 if (pw_id == token->pw_id) 64 return token; 65 } 66 return NULL; 67} 68 69#else /* CONFIG_WPS_NFC */ 70 71#define wps_free_nfc_pw_tokens(t, p) do { } while (0) 72 73#endif /* CONFIG_WPS_NFC */ 74 75 76struct wps_uuid_pin { 77 struct dl_list list; 78 u8 uuid[WPS_UUID_LEN]; 79 int wildcard_uuid; 80 u8 *pin; 81 size_t pin_len; 82#define PIN_LOCKED BIT(0) 83#define PIN_EXPIRES BIT(1) 84 int flags; 85 struct os_reltime expiration; 86 u8 enrollee_addr[ETH_ALEN]; 87}; 88 89 90static void wps_free_pin(struct wps_uuid_pin *pin) 91{ 92 os_free(pin->pin); 93 os_free(pin); 94} 95 96 97static void wps_remove_pin(struct wps_uuid_pin *pin) 98{ 99 dl_list_del(&pin->list); 100 wps_free_pin(pin); 101} 102 103 104static void wps_free_pins(struct dl_list *pins) 105{ 106 struct wps_uuid_pin *pin, *prev; 107 dl_list_for_each_safe(pin, prev, pins, struct wps_uuid_pin, list) 108 wps_remove_pin(pin); 109} 110 111 112struct wps_pbc_session { 113 struct wps_pbc_session *next; 114 u8 addr[ETH_ALEN]; 115 u8 uuid_e[WPS_UUID_LEN]; 116 struct os_reltime timestamp; 117}; 118 119 120static void wps_free_pbc_sessions(struct wps_pbc_session *pbc) 121{ 122 struct wps_pbc_session *prev; 123 124 while (pbc) { 125 prev = pbc; 126 pbc = pbc->next; 127 os_free(prev); 128 } 129} 130 131 132struct wps_registrar_device { 133 struct wps_registrar_device *next; 134 struct wps_device_data dev; 135 u8 uuid[WPS_UUID_LEN]; 136}; 137 138 139struct wps_registrar { 140 struct wps_context *wps; 141 142 int pbc; 143 int selected_registrar; 144 145 int (*new_psk_cb)(void *ctx, const u8 *mac_addr, const u8 *p2p_dev_addr, 146 const u8 *psk, size_t psk_len); 147 int (*set_ie_cb)(void *ctx, struct wpabuf *beacon_ie, 148 struct wpabuf *probe_resp_ie); 149 void (*pin_needed_cb)(void *ctx, const u8 *uuid_e, 150 const struct wps_device_data *dev); 151 void (*reg_success_cb)(void *ctx, const u8 *mac_addr, 152 const u8 *uuid_e, const u8 *dev_pw, 153 size_t dev_pw_len); 154 void (*set_sel_reg_cb)(void *ctx, int sel_reg, u16 dev_passwd_id, 155 u16 sel_reg_config_methods); 156 void (*enrollee_seen_cb)(void *ctx, const u8 *addr, const u8 *uuid_e, 157 const u8 *pri_dev_type, u16 config_methods, 158 u16 dev_password_id, u8 request_type, 159 const char *dev_name); 160 void *cb_ctx; 161 162 struct dl_list pins; 163 struct dl_list nfc_pw_tokens; 164 struct wps_pbc_session *pbc_sessions; 165 166 int skip_cred_build; 167 struct wpabuf *extra_cred; 168 int disable_auto_conf; 169 int sel_reg_union; 170 int sel_reg_dev_password_id_override; 171 int sel_reg_config_methods_override; 172 int static_wep_only; 173 int dualband; 174 int force_per_enrollee_psk; 175 176 struct wps_registrar_device *devices; 177 178 int force_pbc_overlap; 179 180 u8 authorized_macs[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN]; 181 u8 authorized_macs_union[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN]; 182 183 u8 p2p_dev_addr[ETH_ALEN]; 184 185 u8 pbc_ignore_uuid[WPS_UUID_LEN]; 186#ifdef WPS_WORKAROUNDS 187 struct os_reltime pbc_ignore_start; 188#endif /* WPS_WORKAROUNDS */ 189}; 190 191 192static int wps_set_ie(struct wps_registrar *reg); 193static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx); 194static void wps_registrar_set_selected_timeout(void *eloop_ctx, 195 void *timeout_ctx); 196static void wps_registrar_remove_pin(struct wps_registrar *reg, 197 struct wps_uuid_pin *pin); 198 199 200static void wps_registrar_add_authorized_mac(struct wps_registrar *reg, 201 const u8 *addr) 202{ 203 int i; 204 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC " MACSTR, 205 MAC2STR(addr)); 206 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) 207 if (os_memcmp(reg->authorized_macs[i], addr, ETH_ALEN) == 0) { 208 wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was " 209 "already in the list"); 210 return; /* already in list */ 211 } 212 for (i = WPS_MAX_AUTHORIZED_MACS - 1; i > 0; i--) 213 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i - 1], 214 ETH_ALEN); 215 os_memcpy(reg->authorized_macs[0], addr, ETH_ALEN); 216 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs", 217 (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs)); 218} 219 220 221static void wps_registrar_remove_authorized_mac(struct wps_registrar *reg, 222 const u8 *addr) 223{ 224 int i; 225 wpa_printf(MSG_DEBUG, "WPS: Remove authorized MAC " MACSTR, 226 MAC2STR(addr)); 227 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) { 228 if (os_memcmp(reg->authorized_macs, addr, ETH_ALEN) == 0) 229 break; 230 } 231 if (i == WPS_MAX_AUTHORIZED_MACS) { 232 wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was not in the " 233 "list"); 234 return; /* not in the list */ 235 } 236 for (; i + 1 < WPS_MAX_AUTHORIZED_MACS; i++) 237 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i + 1], 238 ETH_ALEN); 239 os_memset(reg->authorized_macs[WPS_MAX_AUTHORIZED_MACS - 1], 0, 240 ETH_ALEN); 241 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs", 242 (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs)); 243} 244 245 246static void wps_free_devices(struct wps_registrar_device *dev) 247{ 248 struct wps_registrar_device *prev; 249 250 while (dev) { 251 prev = dev; 252 dev = dev->next; 253 wps_device_data_free(&prev->dev); 254 os_free(prev); 255 } 256} 257 258 259static struct wps_registrar_device * wps_device_get(struct wps_registrar *reg, 260 const u8 *addr) 261{ 262 struct wps_registrar_device *dev; 263 264 for (dev = reg->devices; dev; dev = dev->next) { 265 if (os_memcmp(dev->dev.mac_addr, addr, ETH_ALEN) == 0) 266 return dev; 267 } 268 return NULL; 269} 270 271 272static void wps_device_clone_data(struct wps_device_data *dst, 273 struct wps_device_data *src) 274{ 275 os_memcpy(dst->mac_addr, src->mac_addr, ETH_ALEN); 276 os_memcpy(dst->pri_dev_type, src->pri_dev_type, WPS_DEV_TYPE_LEN); 277 278#define WPS_STRDUP(n) \ 279 os_free(dst->n); \ 280 dst->n = src->n ? os_strdup(src->n) : NULL 281 282 WPS_STRDUP(device_name); 283 WPS_STRDUP(manufacturer); 284 WPS_STRDUP(model_name); 285 WPS_STRDUP(model_number); 286 WPS_STRDUP(serial_number); 287#undef WPS_STRDUP 288} 289 290 291int wps_device_store(struct wps_registrar *reg, 292 struct wps_device_data *dev, const u8 *uuid) 293{ 294 struct wps_registrar_device *d; 295 296 d = wps_device_get(reg, dev->mac_addr); 297 if (d == NULL) { 298 d = os_zalloc(sizeof(*d)); 299 if (d == NULL) 300 return -1; 301 d->next = reg->devices; 302 reg->devices = d; 303 } 304 305 wps_device_clone_data(&d->dev, dev); 306 os_memcpy(d->uuid, uuid, WPS_UUID_LEN); 307 308 return 0; 309} 310 311 312static void wps_registrar_add_pbc_session(struct wps_registrar *reg, 313 const u8 *addr, const u8 *uuid_e) 314{ 315 struct wps_pbc_session *pbc, *prev = NULL; 316 struct os_reltime now; 317 318 os_get_reltime(&now); 319 320 pbc = reg->pbc_sessions; 321 while (pbc) { 322 if (os_memcmp(pbc->addr, addr, ETH_ALEN) == 0 && 323 os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0) { 324 if (prev) 325 prev->next = pbc->next; 326 else 327 reg->pbc_sessions = pbc->next; 328 break; 329 } 330 prev = pbc; 331 pbc = pbc->next; 332 } 333 334 if (!pbc) { 335 pbc = os_zalloc(sizeof(*pbc)); 336 if (pbc == NULL) 337 return; 338 os_memcpy(pbc->addr, addr, ETH_ALEN); 339 if (uuid_e) 340 os_memcpy(pbc->uuid_e, uuid_e, WPS_UUID_LEN); 341 } 342 343 pbc->next = reg->pbc_sessions; 344 reg->pbc_sessions = pbc; 345 pbc->timestamp = now; 346 347 /* remove entries that have timed out */ 348 prev = pbc; 349 pbc = pbc->next; 350 351 while (pbc) { 352 if (os_reltime_expired(&now, &pbc->timestamp, 353 WPS_PBC_WALK_TIME)) { 354 prev->next = NULL; 355 wps_free_pbc_sessions(pbc); 356 break; 357 } 358 prev = pbc; 359 pbc = pbc->next; 360 } 361} 362 363 364static void wps_registrar_remove_pbc_session(struct wps_registrar *reg, 365 const u8 *uuid_e, 366 const u8 *p2p_dev_addr) 367{ 368 struct wps_pbc_session *pbc, *prev = NULL, *tmp; 369 370 pbc = reg->pbc_sessions; 371 while (pbc) { 372 if (os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0 || 373 (p2p_dev_addr && !is_zero_ether_addr(reg->p2p_dev_addr) && 374 os_memcmp(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN) == 375 0)) { 376 if (prev) 377 prev->next = pbc->next; 378 else 379 reg->pbc_sessions = pbc->next; 380 tmp = pbc; 381 pbc = pbc->next; 382 wpa_printf(MSG_DEBUG, "WPS: Removing PBC session for " 383 "addr=" MACSTR, MAC2STR(tmp->addr)); 384 wpa_hexdump(MSG_DEBUG, "WPS: Removed UUID-E", 385 tmp->uuid_e, WPS_UUID_LEN); 386 os_free(tmp); 387 continue; 388 } 389 prev = pbc; 390 pbc = pbc->next; 391 } 392} 393 394 395int wps_registrar_pbc_overlap(struct wps_registrar *reg, 396 const u8 *addr, const u8 *uuid_e) 397{ 398 int count = 0; 399 struct wps_pbc_session *pbc; 400 struct wps_pbc_session *first = NULL; 401 struct os_reltime now; 402 403 os_get_reltime(&now); 404 405 wpa_printf(MSG_DEBUG, "WPS: Checking active PBC sessions for overlap"); 406 407 if (uuid_e) { 408 wpa_printf(MSG_DEBUG, "WPS: Add one for the requested UUID"); 409 wpa_hexdump(MSG_DEBUG, "WPS: Requested UUID", 410 uuid_e, WPS_UUID_LEN); 411 count++; 412 } 413 414 for (pbc = reg->pbc_sessions; pbc; pbc = pbc->next) { 415 wpa_printf(MSG_DEBUG, "WPS: Consider PBC session with " MACSTR, 416 MAC2STR(pbc->addr)); 417 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", 418 pbc->uuid_e, WPS_UUID_LEN); 419 if (os_reltime_expired(&now, &pbc->timestamp, 420 WPS_PBC_WALK_TIME)) { 421 wpa_printf(MSG_DEBUG, "WPS: PBC walk time has expired"); 422 break; 423 } 424 if (first && 425 os_memcmp(pbc->uuid_e, first->uuid_e, WPS_UUID_LEN) == 0) { 426 wpa_printf(MSG_DEBUG, "WPS: Same Enrollee"); 427 continue; /* same Enrollee */ 428 } 429 if (uuid_e == NULL || 430 os_memcmp(uuid_e, pbc->uuid_e, WPS_UUID_LEN)) { 431 wpa_printf(MSG_DEBUG, "WPS: New Enrollee"); 432 count++; 433 } 434 if (first == NULL) 435 first = pbc; 436 } 437 438 wpa_printf(MSG_DEBUG, "WPS: %u active PBC session(s) found", count); 439 440 return count > 1 ? 1 : 0; 441} 442 443 444static int wps_build_wps_state(struct wps_context *wps, struct wpabuf *msg) 445{ 446 wpa_printf(MSG_DEBUG, "WPS: * Wi-Fi Protected Setup State (%d)", 447 wps->wps_state); 448 wpabuf_put_be16(msg, ATTR_WPS_STATE); 449 wpabuf_put_be16(msg, 1); 450 wpabuf_put_u8(msg, wps->wps_state); 451 return 0; 452} 453 454 455#ifdef CONFIG_WPS_UPNP 456static void wps_registrar_free_pending_m2(struct wps_context *wps) 457{ 458 struct upnp_pending_message *p, *p2, *prev = NULL; 459 p = wps->upnp_msgs; 460 while (p) { 461 if (p->type == WPS_M2 || p->type == WPS_M2D) { 462 if (prev == NULL) 463 wps->upnp_msgs = p->next; 464 else 465 prev->next = p->next; 466 wpa_printf(MSG_DEBUG, "WPS UPnP: Drop pending M2/M2D"); 467 p2 = p; 468 p = p->next; 469 wpabuf_free(p2->msg); 470 os_free(p2); 471 continue; 472 } 473 prev = p; 474 p = p->next; 475 } 476} 477#endif /* CONFIG_WPS_UPNP */ 478 479 480static int wps_build_ap_setup_locked(struct wps_context *wps, 481 struct wpabuf *msg) 482{ 483 if (wps->ap_setup_locked && wps->ap_setup_locked != 2) { 484 wpa_printf(MSG_DEBUG, "WPS: * AP Setup Locked"); 485 wpabuf_put_be16(msg, ATTR_AP_SETUP_LOCKED); 486 wpabuf_put_be16(msg, 1); 487 wpabuf_put_u8(msg, 1); 488 } 489 return 0; 490} 491 492 493static int wps_build_selected_registrar(struct wps_registrar *reg, 494 struct wpabuf *msg) 495{ 496 if (!reg->sel_reg_union) 497 return 0; 498 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar"); 499 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR); 500 wpabuf_put_be16(msg, 1); 501 wpabuf_put_u8(msg, 1); 502 return 0; 503} 504 505 506static int wps_build_sel_reg_dev_password_id(struct wps_registrar *reg, 507 struct wpabuf *msg) 508{ 509 u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT; 510 if (!reg->sel_reg_union) 511 return 0; 512 if (reg->sel_reg_dev_password_id_override >= 0) 513 id = reg->sel_reg_dev_password_id_override; 514 wpa_printf(MSG_DEBUG, "WPS: * Device Password ID (%d)", id); 515 wpabuf_put_be16(msg, ATTR_DEV_PASSWORD_ID); 516 wpabuf_put_be16(msg, 2); 517 wpabuf_put_be16(msg, id); 518 return 0; 519} 520 521 522static int wps_build_sel_pbc_reg_uuid_e(struct wps_registrar *reg, 523 struct wpabuf *msg) 524{ 525 u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT; 526 if (!reg->sel_reg_union) 527 return 0; 528 if (reg->sel_reg_dev_password_id_override >= 0) 529 id = reg->sel_reg_dev_password_id_override; 530 if (id != DEV_PW_PUSHBUTTON || !reg->dualband) 531 return 0; 532 return wps_build_uuid_e(msg, reg->wps->uuid); 533} 534 535 536static void wps_set_pushbutton(u16 *methods, u16 conf_methods) 537{ 538 *methods |= WPS_CONFIG_PUSHBUTTON; 539#ifdef CONFIG_WPS2 540 if ((conf_methods & WPS_CONFIG_VIRT_PUSHBUTTON) == 541 WPS_CONFIG_VIRT_PUSHBUTTON) 542 *methods |= WPS_CONFIG_VIRT_PUSHBUTTON; 543 if ((conf_methods & WPS_CONFIG_PHY_PUSHBUTTON) == 544 WPS_CONFIG_PHY_PUSHBUTTON) 545 *methods |= WPS_CONFIG_PHY_PUSHBUTTON; 546 if ((*methods & WPS_CONFIG_VIRT_PUSHBUTTON) != 547 WPS_CONFIG_VIRT_PUSHBUTTON && 548 (*methods & WPS_CONFIG_PHY_PUSHBUTTON) != 549 WPS_CONFIG_PHY_PUSHBUTTON) { 550 /* 551 * Required to include virtual/physical flag, but we were not 552 * configured with push button type, so have to default to one 553 * of them. 554 */ 555 *methods |= WPS_CONFIG_PHY_PUSHBUTTON; 556 } 557#endif /* CONFIG_WPS2 */ 558} 559 560 561static int wps_build_sel_reg_config_methods(struct wps_registrar *reg, 562 struct wpabuf *msg) 563{ 564 u16 methods; 565 if (!reg->sel_reg_union) 566 return 0; 567 methods = reg->wps->config_methods; 568 methods &= ~WPS_CONFIG_PUSHBUTTON; 569#ifdef CONFIG_WPS2 570 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 571 WPS_CONFIG_PHY_PUSHBUTTON); 572#endif /* CONFIG_WPS2 */ 573 if (reg->pbc) 574 wps_set_pushbutton(&methods, reg->wps->config_methods); 575 if (reg->sel_reg_config_methods_override >= 0) 576 methods = reg->sel_reg_config_methods_override; 577 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar Config Methods (%x)", 578 methods); 579 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR_CONFIG_METHODS); 580 wpabuf_put_be16(msg, 2); 581 wpabuf_put_be16(msg, methods); 582 return 0; 583} 584 585 586static int wps_build_probe_config_methods(struct wps_registrar *reg, 587 struct wpabuf *msg) 588{ 589 u16 methods; 590 /* 591 * These are the methods that the AP supports as an Enrollee for adding 592 * external Registrars. 593 */ 594 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 595#ifdef CONFIG_WPS2 596 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 597 WPS_CONFIG_PHY_PUSHBUTTON); 598#endif /* CONFIG_WPS2 */ 599 wpa_printf(MSG_DEBUG, "WPS: * Config Methods (%x)", methods); 600 wpabuf_put_be16(msg, ATTR_CONFIG_METHODS); 601 wpabuf_put_be16(msg, 2); 602 wpabuf_put_be16(msg, methods); 603 return 0; 604} 605 606 607static int wps_build_config_methods_r(struct wps_registrar *reg, 608 struct wpabuf *msg) 609{ 610 return wps_build_config_methods(msg, reg->wps->config_methods); 611} 612 613 614const u8 * wps_authorized_macs(struct wps_registrar *reg, size_t *count) 615{ 616 *count = 0; 617 618#ifdef CONFIG_WPS2 619 while (*count < WPS_MAX_AUTHORIZED_MACS) { 620 if (is_zero_ether_addr(reg->authorized_macs_union[*count])) 621 break; 622 (*count)++; 623 } 624#endif /* CONFIG_WPS2 */ 625 626 return (const u8 *) reg->authorized_macs_union; 627} 628 629 630/** 631 * wps_registrar_init - Initialize WPS Registrar data 632 * @wps: Pointer to longterm WPS context 633 * @cfg: Registrar configuration 634 * Returns: Pointer to allocated Registrar data or %NULL on failure 635 * 636 * This function is used to initialize WPS Registrar functionality. It can be 637 * used for a single Registrar run (e.g., when run in a supplicant) or multiple 638 * runs (e.g., when run as an internal Registrar in an AP). Caller is 639 * responsible for freeing the returned data with wps_registrar_deinit() when 640 * Registrar functionality is not needed anymore. 641 */ 642struct wps_registrar * 643wps_registrar_init(struct wps_context *wps, 644 const struct wps_registrar_config *cfg) 645{ 646 struct wps_registrar *reg = os_zalloc(sizeof(*reg)); 647 if (reg == NULL) 648 return NULL; 649 650 dl_list_init(®->pins); 651 dl_list_init(®->nfc_pw_tokens); 652 reg->wps = wps; 653 reg->new_psk_cb = cfg->new_psk_cb; 654 reg->set_ie_cb = cfg->set_ie_cb; 655 reg->pin_needed_cb = cfg->pin_needed_cb; 656 reg->reg_success_cb = cfg->reg_success_cb; 657 reg->set_sel_reg_cb = cfg->set_sel_reg_cb; 658 reg->enrollee_seen_cb = cfg->enrollee_seen_cb; 659 reg->cb_ctx = cfg->cb_ctx; 660 reg->skip_cred_build = cfg->skip_cred_build; 661 if (cfg->extra_cred) { 662 reg->extra_cred = wpabuf_alloc_copy(cfg->extra_cred, 663 cfg->extra_cred_len); 664 if (reg->extra_cred == NULL) { 665 os_free(reg); 666 return NULL; 667 } 668 } 669 reg->disable_auto_conf = cfg->disable_auto_conf; 670 reg->sel_reg_dev_password_id_override = -1; 671 reg->sel_reg_config_methods_override = -1; 672 reg->static_wep_only = cfg->static_wep_only; 673 reg->dualband = cfg->dualband; 674 reg->force_per_enrollee_psk = cfg->force_per_enrollee_psk; 675 676 if (wps_set_ie(reg)) { 677 wps_registrar_deinit(reg); 678 return NULL; 679 } 680 681 return reg; 682} 683 684 685/** 686 * wps_registrar_deinit - Deinitialize WPS Registrar data 687 * @reg: Registrar data from wps_registrar_init() 688 */ 689void wps_registrar_deinit(struct wps_registrar *reg) 690{ 691 if (reg == NULL) 692 return; 693 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 694 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 695 wps_free_pins(®->pins); 696 wps_free_nfc_pw_tokens(®->nfc_pw_tokens, 0); 697 wps_free_pbc_sessions(reg->pbc_sessions); 698 wpabuf_free(reg->extra_cred); 699 wps_free_devices(reg->devices); 700 os_free(reg); 701} 702 703 704static void wps_registrar_invalidate_unused(struct wps_registrar *reg) 705{ 706 struct wps_uuid_pin *pin; 707 708 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 709 if (pin->wildcard_uuid == 1 && !(pin->flags & PIN_LOCKED)) { 710 wpa_printf(MSG_DEBUG, "WPS: Invalidate previously " 711 "configured wildcard PIN"); 712 wps_registrar_remove_pin(reg, pin); 713 break; 714 } 715 } 716} 717 718 719/** 720 * wps_registrar_add_pin - Configure a new PIN for Registrar 721 * @reg: Registrar data from wps_registrar_init() 722 * @addr: Enrollee MAC address or %NULL if not known 723 * @uuid: UUID-E or %NULL for wildcard (any UUID) 724 * @pin: PIN (Device Password) 725 * @pin_len: Length of pin in octets 726 * @timeout: Time (in seconds) when the PIN will be invalidated; 0 = no timeout 727 * Returns: 0 on success, -1 on failure 728 */ 729int wps_registrar_add_pin(struct wps_registrar *reg, const u8 *addr, 730 const u8 *uuid, const u8 *pin, size_t pin_len, 731 int timeout) 732{ 733 struct wps_uuid_pin *p; 734 735 p = os_zalloc(sizeof(*p)); 736 if (p == NULL) 737 return -1; 738 if (addr) 739 os_memcpy(p->enrollee_addr, addr, ETH_ALEN); 740 if (uuid == NULL) 741 p->wildcard_uuid = 1; 742 else 743 os_memcpy(p->uuid, uuid, WPS_UUID_LEN); 744 p->pin = os_malloc(pin_len); 745 if (p->pin == NULL) { 746 os_free(p); 747 return -1; 748 } 749 os_memcpy(p->pin, pin, pin_len); 750 p->pin_len = pin_len; 751 752 if (timeout) { 753 p->flags |= PIN_EXPIRES; 754 os_get_reltime(&p->expiration); 755 p->expiration.sec += timeout; 756 } 757 758 if (p->wildcard_uuid) 759 wps_registrar_invalidate_unused(reg); 760 761 dl_list_add(®->pins, &p->list); 762 763 wpa_printf(MSG_DEBUG, "WPS: A new PIN configured (timeout=%d)", 764 timeout); 765 wpa_hexdump(MSG_DEBUG, "WPS: UUID", uuid, WPS_UUID_LEN); 766 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: PIN", pin, pin_len); 767 reg->selected_registrar = 1; 768 reg->pbc = 0; 769 if (addr) 770 wps_registrar_add_authorized_mac(reg, addr); 771 else 772 wps_registrar_add_authorized_mac( 773 reg, (u8 *) "\xff\xff\xff\xff\xff\xff"); 774 wps_registrar_selected_registrar_changed(reg, 0); 775 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 776 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, 777 wps_registrar_set_selected_timeout, 778 reg, NULL); 779 780 return 0; 781} 782 783 784static void wps_registrar_remove_pin(struct wps_registrar *reg, 785 struct wps_uuid_pin *pin) 786{ 787 u8 *addr; 788 u8 bcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 789 790 if (is_zero_ether_addr(pin->enrollee_addr)) 791 addr = bcast; 792 else 793 addr = pin->enrollee_addr; 794 wps_registrar_remove_authorized_mac(reg, addr); 795 wps_remove_pin(pin); 796 wps_registrar_selected_registrar_changed(reg, 0); 797} 798 799 800static void wps_registrar_expire_pins(struct wps_registrar *reg) 801{ 802 struct wps_uuid_pin *pin, *prev; 803 struct os_reltime now; 804 805 os_get_reltime(&now); 806 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 807 { 808 if ((pin->flags & PIN_EXPIRES) && 809 os_reltime_before(&pin->expiration, &now)) { 810 wpa_hexdump(MSG_DEBUG, "WPS: Expired PIN for UUID", 811 pin->uuid, WPS_UUID_LEN); 812 wps_registrar_remove_pin(reg, pin); 813 } 814 } 815} 816 817 818/** 819 * wps_registrar_invalidate_wildcard_pin - Invalidate a wildcard PIN 820 * @reg: Registrar data from wps_registrar_init() 821 * @dev_pw: PIN to search for or %NULL to match any 822 * @dev_pw_len: Length of dev_pw in octets 823 * Returns: 0 on success, -1 if not wildcard PIN is enabled 824 */ 825static int wps_registrar_invalidate_wildcard_pin(struct wps_registrar *reg, 826 const u8 *dev_pw, 827 size_t dev_pw_len) 828{ 829 struct wps_uuid_pin *pin, *prev; 830 831 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 832 { 833 if (dev_pw && pin->pin && 834 (dev_pw_len != pin->pin_len || 835 os_memcmp(dev_pw, pin->pin, dev_pw_len) != 0)) 836 continue; /* different PIN */ 837 if (pin->wildcard_uuid) { 838 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID", 839 pin->uuid, WPS_UUID_LEN); 840 wps_registrar_remove_pin(reg, pin); 841 return 0; 842 } 843 } 844 845 return -1; 846} 847 848 849/** 850 * wps_registrar_invalidate_pin - Invalidate a PIN for a specific UUID-E 851 * @reg: Registrar data from wps_registrar_init() 852 * @uuid: UUID-E 853 * Returns: 0 on success, -1 on failure (e.g., PIN not found) 854 */ 855int wps_registrar_invalidate_pin(struct wps_registrar *reg, const u8 *uuid) 856{ 857 struct wps_uuid_pin *pin, *prev; 858 859 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 860 { 861 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 862 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID", 863 pin->uuid, WPS_UUID_LEN); 864 wps_registrar_remove_pin(reg, pin); 865 return 0; 866 } 867 } 868 869 return -1; 870} 871 872 873static const u8 * wps_registrar_get_pin(struct wps_registrar *reg, 874 const u8 *uuid, size_t *pin_len) 875{ 876 struct wps_uuid_pin *pin, *found = NULL; 877 878 wps_registrar_expire_pins(reg); 879 880 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 881 if (!pin->wildcard_uuid && 882 os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 883 found = pin; 884 break; 885 } 886 } 887 888 if (!found) { 889 /* Check for wildcard UUIDs since none of the UUID-specific 890 * PINs matched */ 891 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 892 if (pin->wildcard_uuid == 1 || 893 pin->wildcard_uuid == 2) { 894 wpa_printf(MSG_DEBUG, "WPS: Found a wildcard " 895 "PIN. Assigned it for this UUID-E"); 896 pin->wildcard_uuid++; 897 os_memcpy(pin->uuid, uuid, WPS_UUID_LEN); 898 found = pin; 899 break; 900 } 901 } 902 } 903 904 if (!found) 905 return NULL; 906 907 /* 908 * Lock the PIN to avoid attacks based on concurrent re-use of the PIN 909 * that could otherwise avoid PIN invalidations. 910 */ 911 if (found->flags & PIN_LOCKED) { 912 wpa_printf(MSG_DEBUG, "WPS: Selected PIN locked - do not " 913 "allow concurrent re-use"); 914 return NULL; 915 } 916 *pin_len = found->pin_len; 917 found->flags |= PIN_LOCKED; 918 return found->pin; 919} 920 921 922/** 923 * wps_registrar_unlock_pin - Unlock a PIN for a specific UUID-E 924 * @reg: Registrar data from wps_registrar_init() 925 * @uuid: UUID-E 926 * Returns: 0 on success, -1 on failure 927 * 928 * PINs are locked to enforce only one concurrent use. This function unlocks a 929 * PIN to allow it to be used again. If the specified PIN was configured using 930 * a wildcard UUID, it will be removed instead of allowing multiple uses. 931 */ 932int wps_registrar_unlock_pin(struct wps_registrar *reg, const u8 *uuid) 933{ 934 struct wps_uuid_pin *pin; 935 936 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 937 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 938 if (pin->wildcard_uuid == 3) { 939 wpa_printf(MSG_DEBUG, "WPS: Invalidating used " 940 "wildcard PIN"); 941 return wps_registrar_invalidate_pin(reg, uuid); 942 } 943 pin->flags &= ~PIN_LOCKED; 944 return 0; 945 } 946 } 947 948 return -1; 949} 950 951 952static void wps_registrar_stop_pbc(struct wps_registrar *reg) 953{ 954 reg->selected_registrar = 0; 955 reg->pbc = 0; 956 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN); 957 wps_registrar_remove_authorized_mac(reg, 958 (u8 *) "\xff\xff\xff\xff\xff\xff"); 959 wps_registrar_selected_registrar_changed(reg, 0); 960} 961 962 963static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx) 964{ 965 struct wps_registrar *reg = eloop_ctx; 966 967 wpa_printf(MSG_DEBUG, "WPS: PBC timed out - disable PBC mode"); 968 wps_pbc_timeout_event(reg->wps); 969 wps_registrar_stop_pbc(reg); 970} 971 972 973/** 974 * wps_registrar_button_pushed - Notify Registrar that AP button was pushed 975 * @reg: Registrar data from wps_registrar_init() 976 * @p2p_dev_addr: Limit allowed PBC devices to the specified P2P device, %NULL 977 * indicates no such filtering 978 * Returns: 0 on success, -1 on failure, -2 on session overlap 979 * 980 * This function is called on an AP when a push button is pushed to activate 981 * PBC mode. The PBC mode will be stopped after walk time (2 minutes) timeout 982 * or when a PBC registration is completed. If more than one Enrollee in active 983 * PBC mode has been detected during the monitor time (previous 2 minutes), the 984 * PBC mode is not activated and -2 is returned to indicate session overlap. 985 * This is skipped if a specific Enrollee is selected. 986 */ 987int wps_registrar_button_pushed(struct wps_registrar *reg, 988 const u8 *p2p_dev_addr) 989{ 990 if (p2p_dev_addr == NULL && 991 wps_registrar_pbc_overlap(reg, NULL, NULL)) { 992 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - do not start PBC " 993 "mode"); 994 wps_pbc_overlap_event(reg->wps); 995 return -2; 996 } 997 wpa_printf(MSG_DEBUG, "WPS: Button pushed - PBC mode started"); 998 reg->force_pbc_overlap = 0; 999 reg->selected_registrar = 1; 1000 reg->pbc = 1; 1001 if (p2p_dev_addr) 1002 os_memcpy(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN); 1003 else 1004 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN); 1005 wps_registrar_add_authorized_mac(reg, 1006 (u8 *) "\xff\xff\xff\xff\xff\xff"); 1007 wps_registrar_selected_registrar_changed(reg, 0); 1008 1009 wps_pbc_active_event(reg->wps); 1010 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 1011 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 1012 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wps_registrar_pbc_timeout, 1013 reg, NULL); 1014 return 0; 1015} 1016 1017 1018static void wps_registrar_pbc_completed(struct wps_registrar *reg) 1019{ 1020 wpa_printf(MSG_DEBUG, "WPS: PBC completed - stopping PBC mode"); 1021 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 1022 wps_registrar_stop_pbc(reg); 1023 wps_pbc_disable_event(reg->wps); 1024} 1025 1026 1027static void wps_registrar_pin_completed(struct wps_registrar *reg) 1028{ 1029 wpa_printf(MSG_DEBUG, "WPS: PIN completed using internal Registrar"); 1030 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 1031 reg->selected_registrar = 0; 1032 wps_registrar_selected_registrar_changed(reg, 0); 1033} 1034 1035 1036void wps_registrar_complete(struct wps_registrar *registrar, const u8 *uuid_e, 1037 const u8 *dev_pw, size_t dev_pw_len) 1038{ 1039 if (registrar->pbc) { 1040 wps_registrar_remove_pbc_session(registrar, 1041 uuid_e, NULL); 1042 wps_registrar_pbc_completed(registrar); 1043#ifdef WPS_WORKAROUNDS 1044 os_get_reltime(®istrar->pbc_ignore_start); 1045#endif /* WPS_WORKAROUNDS */ 1046 os_memcpy(registrar->pbc_ignore_uuid, uuid_e, WPS_UUID_LEN); 1047 } else { 1048 wps_registrar_pin_completed(registrar); 1049 } 1050 1051 if (dev_pw && 1052 wps_registrar_invalidate_wildcard_pin(registrar, dev_pw, 1053 dev_pw_len) == 0) { 1054 wpa_hexdump_key(MSG_DEBUG, "WPS: Invalidated wildcard PIN", 1055 dev_pw, dev_pw_len); 1056 } 1057} 1058 1059 1060int wps_registrar_wps_cancel(struct wps_registrar *reg) 1061{ 1062 if (reg->pbc) { 1063 wpa_printf(MSG_DEBUG, "WPS: PBC is set - cancelling it"); 1064 wps_registrar_pbc_timeout(reg, NULL); 1065 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 1066 return 1; 1067 } else if (reg->selected_registrar) { 1068 /* PIN Method */ 1069 wpa_printf(MSG_DEBUG, "WPS: PIN is set - cancelling it"); 1070 wps_registrar_pin_completed(reg); 1071 wps_registrar_invalidate_wildcard_pin(reg, NULL, 0); 1072 return 1; 1073 } 1074 return 0; 1075} 1076 1077 1078/** 1079 * wps_registrar_probe_req_rx - Notify Registrar of Probe Request 1080 * @reg: Registrar data from wps_registrar_init() 1081 * @addr: MAC address of the Probe Request sender 1082 * @wps_data: WPS IE contents 1083 * 1084 * This function is called on an AP when a Probe Request with WPS IE is 1085 * received. This is used to track PBC mode use and to detect possible overlap 1086 * situation with other WPS APs. 1087 */ 1088void wps_registrar_probe_req_rx(struct wps_registrar *reg, const u8 *addr, 1089 const struct wpabuf *wps_data, 1090 int p2p_wildcard) 1091{ 1092 struct wps_parse_attr attr; 1093 int skip_add = 0; 1094 1095 wpa_hexdump_buf(MSG_MSGDUMP, 1096 "WPS: Probe Request with WPS data received", 1097 wps_data); 1098 1099 if (wps_parse_msg(wps_data, &attr) < 0) 1100 return; 1101 1102 if (attr.config_methods == NULL) { 1103 wpa_printf(MSG_DEBUG, "WPS: No Config Methods attribute in " 1104 "Probe Request"); 1105 return; 1106 } 1107 1108 if (attr.dev_password_id == NULL) { 1109 wpa_printf(MSG_DEBUG, "WPS: No Device Password Id attribute " 1110 "in Probe Request"); 1111 return; 1112 } 1113 1114 if (reg->enrollee_seen_cb && attr.uuid_e && 1115 attr.primary_dev_type && attr.request_type && !p2p_wildcard) { 1116 char *dev_name = NULL; 1117 if (attr.dev_name) { 1118 dev_name = os_zalloc(attr.dev_name_len + 1); 1119 if (dev_name) { 1120 os_memcpy(dev_name, attr.dev_name, 1121 attr.dev_name_len); 1122 } 1123 } 1124 reg->enrollee_seen_cb(reg->cb_ctx, addr, attr.uuid_e, 1125 attr.primary_dev_type, 1126 WPA_GET_BE16(attr.config_methods), 1127 WPA_GET_BE16(attr.dev_password_id), 1128 *attr.request_type, dev_name); 1129 os_free(dev_name); 1130 } 1131 1132 if (WPA_GET_BE16(attr.dev_password_id) != DEV_PW_PUSHBUTTON) 1133 return; /* Not PBC */ 1134 1135 wpa_printf(MSG_DEBUG, "WPS: Probe Request for PBC received from " 1136 MACSTR, MAC2STR(addr)); 1137 if (attr.uuid_e == NULL) { 1138 wpa_printf(MSG_DEBUG, "WPS: Invalid Probe Request WPS IE: No " 1139 "UUID-E included"); 1140 return; 1141 } 1142 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E from Probe Request", attr.uuid_e, 1143 WPS_UUID_LEN); 1144 1145#ifdef WPS_WORKAROUNDS 1146 if (reg->pbc_ignore_start.sec && 1147 os_memcmp(attr.uuid_e, reg->pbc_ignore_uuid, WPS_UUID_LEN) == 0) { 1148 struct os_reltime now, dur; 1149 os_get_reltime(&now); 1150 os_reltime_sub(&now, ®->pbc_ignore_start, &dur); 1151 if (dur.sec >= 0 && dur.sec < 5) { 1152 wpa_printf(MSG_DEBUG, "WPS: Ignore PBC activation " 1153 "based on Probe Request from the Enrollee " 1154 "that just completed PBC provisioning"); 1155 skip_add = 1; 1156 } else 1157 reg->pbc_ignore_start.sec = 0; 1158 } 1159#endif /* WPS_WORKAROUNDS */ 1160 1161 if (!skip_add) 1162 wps_registrar_add_pbc_session(reg, addr, attr.uuid_e); 1163 if (wps_registrar_pbc_overlap(reg, addr, attr.uuid_e)) { 1164 wpa_printf(MSG_DEBUG, "WPS: PBC session overlap detected"); 1165 reg->force_pbc_overlap = 1; 1166 wps_pbc_overlap_event(reg->wps); 1167 } 1168} 1169 1170 1171static int wps_cb_new_psk(struct wps_registrar *reg, const u8 *mac_addr, 1172 const u8 *p2p_dev_addr, const u8 *psk, size_t psk_len) 1173{ 1174 if (reg->new_psk_cb == NULL) 1175 return 0; 1176 1177 return reg->new_psk_cb(reg->cb_ctx, mac_addr, p2p_dev_addr, psk, 1178 psk_len); 1179} 1180 1181 1182static void wps_cb_pin_needed(struct wps_registrar *reg, const u8 *uuid_e, 1183 const struct wps_device_data *dev) 1184{ 1185 if (reg->pin_needed_cb == NULL) 1186 return; 1187 1188 reg->pin_needed_cb(reg->cb_ctx, uuid_e, dev); 1189} 1190 1191 1192static void wps_cb_reg_success(struct wps_registrar *reg, const u8 *mac_addr, 1193 const u8 *uuid_e, const u8 *dev_pw, 1194 size_t dev_pw_len) 1195{ 1196 if (reg->reg_success_cb == NULL) 1197 return; 1198 1199 reg->reg_success_cb(reg->cb_ctx, mac_addr, uuid_e, dev_pw, dev_pw_len); 1200} 1201 1202 1203static int wps_cb_set_ie(struct wps_registrar *reg, struct wpabuf *beacon_ie, 1204 struct wpabuf *probe_resp_ie) 1205{ 1206 return reg->set_ie_cb(reg->cb_ctx, beacon_ie, probe_resp_ie); 1207} 1208 1209 1210static void wps_cb_set_sel_reg(struct wps_registrar *reg) 1211{ 1212 u16 methods = 0; 1213 if (reg->set_sel_reg_cb == NULL) 1214 return; 1215 1216 if (reg->selected_registrar) { 1217 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 1218#ifdef CONFIG_WPS2 1219 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 1220 WPS_CONFIG_PHY_PUSHBUTTON); 1221#endif /* CONFIG_WPS2 */ 1222 if (reg->pbc) 1223 wps_set_pushbutton(&methods, reg->wps->config_methods); 1224 } 1225 1226 wpa_printf(MSG_DEBUG, "WPS: wps_cb_set_sel_reg: sel_reg=%d " 1227 "config_methods=0x%x pbc=%d methods=0x%x", 1228 reg->selected_registrar, reg->wps->config_methods, 1229 reg->pbc, methods); 1230 1231 reg->set_sel_reg_cb(reg->cb_ctx, reg->selected_registrar, 1232 reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT, 1233 methods); 1234} 1235 1236 1237static int wps_set_ie(struct wps_registrar *reg) 1238{ 1239 struct wpabuf *beacon; 1240 struct wpabuf *probe; 1241 const u8 *auth_macs; 1242 size_t count; 1243 size_t vendor_len = 0; 1244 int i; 1245 1246 if (reg->set_ie_cb == NULL) 1247 return 0; 1248 1249 for (i = 0; i < MAX_WPS_VENDOR_EXTENSIONS; i++) { 1250 if (reg->wps->dev.vendor_ext[i]) { 1251 vendor_len += 2 + 2; 1252 vendor_len += wpabuf_len(reg->wps->dev.vendor_ext[i]); 1253 } 1254 } 1255 1256 beacon = wpabuf_alloc(400 + vendor_len); 1257 if (beacon == NULL) 1258 return -1; 1259 probe = wpabuf_alloc(500 + vendor_len); 1260 if (probe == NULL) { 1261 wpabuf_free(beacon); 1262 return -1; 1263 } 1264 1265 auth_macs = wps_authorized_macs(reg, &count); 1266 1267 wpa_printf(MSG_DEBUG, "WPS: Build Beacon IEs"); 1268 1269 if (wps_build_version(beacon) || 1270 wps_build_wps_state(reg->wps, beacon) || 1271 wps_build_ap_setup_locked(reg->wps, beacon) || 1272 wps_build_selected_registrar(reg, beacon) || 1273 wps_build_sel_reg_dev_password_id(reg, beacon) || 1274 wps_build_sel_reg_config_methods(reg, beacon) || 1275 wps_build_sel_pbc_reg_uuid_e(reg, beacon) || 1276 (reg->dualband && wps_build_rf_bands(®->wps->dev, beacon, 0)) || 1277 wps_build_wfa_ext(beacon, 0, auth_macs, count) || 1278 wps_build_vendor_ext(®->wps->dev, beacon)) { 1279 wpabuf_free(beacon); 1280 wpabuf_free(probe); 1281 return -1; 1282 } 1283 1284#ifdef CONFIG_P2P 1285 if (wps_build_dev_name(®->wps->dev, beacon) || 1286 wps_build_primary_dev_type(®->wps->dev, beacon)) { 1287 wpabuf_free(beacon); 1288 wpabuf_free(probe); 1289 return -1; 1290 } 1291#endif /* CONFIG_P2P */ 1292 1293 wpa_printf(MSG_DEBUG, "WPS: Build Probe Response IEs"); 1294 1295 if (wps_build_version(probe) || 1296 wps_build_wps_state(reg->wps, probe) || 1297 wps_build_ap_setup_locked(reg->wps, probe) || 1298 wps_build_selected_registrar(reg, probe) || 1299 wps_build_sel_reg_dev_password_id(reg, probe) || 1300 wps_build_sel_reg_config_methods(reg, probe) || 1301 wps_build_resp_type(probe, reg->wps->ap ? WPS_RESP_AP : 1302 WPS_RESP_REGISTRAR) || 1303 wps_build_uuid_e(probe, reg->wps->uuid) || 1304 wps_build_device_attrs(®->wps->dev, probe) || 1305 wps_build_probe_config_methods(reg, probe) || 1306 (reg->dualband && wps_build_rf_bands(®->wps->dev, probe, 0)) || 1307 wps_build_wfa_ext(probe, 0, auth_macs, count) || 1308 wps_build_vendor_ext(®->wps->dev, probe)) { 1309 wpabuf_free(beacon); 1310 wpabuf_free(probe); 1311 return -1; 1312 } 1313 1314 beacon = wps_ie_encapsulate(beacon); 1315 probe = wps_ie_encapsulate(probe); 1316 1317 if (!beacon || !probe) { 1318 wpabuf_free(beacon); 1319 wpabuf_free(probe); 1320 return -1; 1321 } 1322 1323 if (reg->static_wep_only) { 1324 /* 1325 * Windows XP and Vista clients can get confused about 1326 * EAP-Identity/Request when they probe the network with 1327 * EAPOL-Start. In such a case, they may assume the network is 1328 * using IEEE 802.1X and prompt user for a certificate while 1329 * the correct (non-WPS) behavior would be to ask for the 1330 * static WEP key. As a workaround, use Microsoft Provisioning 1331 * IE to advertise that legacy 802.1X is not supported. 1332 */ 1333 const u8 ms_wps[7] = { 1334 WLAN_EID_VENDOR_SPECIFIC, 5, 1335 /* Microsoft Provisioning IE (00:50:f2:5) */ 1336 0x00, 0x50, 0xf2, 5, 1337 0x00 /* no legacy 802.1X or MS WPS */ 1338 }; 1339 wpa_printf(MSG_DEBUG, "WPS: Add Microsoft Provisioning IE " 1340 "into Beacon/Probe Response frames"); 1341 wpabuf_put_data(beacon, ms_wps, sizeof(ms_wps)); 1342 wpabuf_put_data(probe, ms_wps, sizeof(ms_wps)); 1343 } 1344 1345 return wps_cb_set_ie(reg, beacon, probe); 1346} 1347 1348 1349static int wps_get_dev_password(struct wps_data *wps) 1350{ 1351 const u8 *pin; 1352 size_t pin_len = 0; 1353 1354 os_free(wps->dev_password); 1355 wps->dev_password = NULL; 1356 1357 if (wps->pbc) { 1358 wpa_printf(MSG_DEBUG, "WPS: Use default PIN for PBC"); 1359 pin = (const u8 *) "00000000"; 1360 pin_len = 8; 1361#ifdef CONFIG_WPS_NFC 1362 } else if (wps->nfc_pw_token) { 1363 wpa_printf(MSG_DEBUG, "WPS: Use OOB Device Password from NFC " 1364 "Password Token"); 1365 pin = wps->nfc_pw_token->dev_pw; 1366 pin_len = wps->nfc_pw_token->dev_pw_len; 1367#endif /* CONFIG_WPS_NFC */ 1368 } else { 1369 pin = wps_registrar_get_pin(wps->wps->registrar, wps->uuid_e, 1370 &pin_len); 1371 if (pin && wps->dev_pw_id >= 0x10) { 1372 wpa_printf(MSG_DEBUG, "WPS: No match for OOB Device " 1373 "Password ID, but PIN found"); 1374 /* 1375 * See whether Enrollee is willing to use PIN instead. 1376 */ 1377 wps->dev_pw_id = DEV_PW_DEFAULT; 1378 } 1379 } 1380 if (pin == NULL) { 1381 wpa_printf(MSG_DEBUG, "WPS: No Device Password available for " 1382 "the Enrollee (context %p registrar %p)", 1383 wps->wps, wps->wps->registrar); 1384 wps_cb_pin_needed(wps->wps->registrar, wps->uuid_e, 1385 &wps->peer_dev); 1386 return -1; 1387 } 1388 1389 wps->dev_password = os_malloc(pin_len); 1390 if (wps->dev_password == NULL) 1391 return -1; 1392 os_memcpy(wps->dev_password, pin, pin_len); 1393 wps->dev_password_len = pin_len; 1394 1395 return 0; 1396} 1397 1398 1399static int wps_build_uuid_r(struct wps_data *wps, struct wpabuf *msg) 1400{ 1401 wpa_printf(MSG_DEBUG, "WPS: * UUID-R"); 1402 wpabuf_put_be16(msg, ATTR_UUID_R); 1403 wpabuf_put_be16(msg, WPS_UUID_LEN); 1404 wpabuf_put_data(msg, wps->uuid_r, WPS_UUID_LEN); 1405 return 0; 1406} 1407 1408 1409static int wps_build_r_hash(struct wps_data *wps, struct wpabuf *msg) 1410{ 1411 u8 *hash; 1412 const u8 *addr[4]; 1413 size_t len[4]; 1414 1415 if (random_get_bytes(wps->snonce, 2 * WPS_SECRET_NONCE_LEN) < 0) 1416 return -1; 1417 wpa_hexdump(MSG_DEBUG, "WPS: R-S1", wps->snonce, WPS_SECRET_NONCE_LEN); 1418 wpa_hexdump(MSG_DEBUG, "WPS: R-S2", 1419 wps->snonce + WPS_SECRET_NONCE_LEN, WPS_SECRET_NONCE_LEN); 1420 1421 if (wps->dh_pubkey_e == NULL || wps->dh_pubkey_r == NULL) { 1422 wpa_printf(MSG_DEBUG, "WPS: DH public keys not available for " 1423 "R-Hash derivation"); 1424 return -1; 1425 } 1426 1427 wpa_printf(MSG_DEBUG, "WPS: * R-Hash1"); 1428 wpabuf_put_be16(msg, ATTR_R_HASH1); 1429 wpabuf_put_be16(msg, SHA256_MAC_LEN); 1430 hash = wpabuf_put(msg, SHA256_MAC_LEN); 1431 /* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */ 1432 addr[0] = wps->snonce; 1433 len[0] = WPS_SECRET_NONCE_LEN; 1434 addr[1] = wps->psk1; 1435 len[1] = WPS_PSK_LEN; 1436 addr[2] = wpabuf_head(wps->dh_pubkey_e); 1437 len[2] = wpabuf_len(wps->dh_pubkey_e); 1438 addr[3] = wpabuf_head(wps->dh_pubkey_r); 1439 len[3] = wpabuf_len(wps->dh_pubkey_r); 1440 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 1441 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash1", hash, SHA256_MAC_LEN); 1442 1443 wpa_printf(MSG_DEBUG, "WPS: * R-Hash2"); 1444 wpabuf_put_be16(msg, ATTR_R_HASH2); 1445 wpabuf_put_be16(msg, SHA256_MAC_LEN); 1446 hash = wpabuf_put(msg, SHA256_MAC_LEN); 1447 /* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */ 1448 addr[0] = wps->snonce + WPS_SECRET_NONCE_LEN; 1449 addr[1] = wps->psk2; 1450 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 1451 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash2", hash, SHA256_MAC_LEN); 1452 1453 return 0; 1454} 1455 1456 1457static int wps_build_r_snonce1(struct wps_data *wps, struct wpabuf *msg) 1458{ 1459 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce1"); 1460 wpabuf_put_be16(msg, ATTR_R_SNONCE1); 1461 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN); 1462 wpabuf_put_data(msg, wps->snonce, WPS_SECRET_NONCE_LEN); 1463 return 0; 1464} 1465 1466 1467static int wps_build_r_snonce2(struct wps_data *wps, struct wpabuf *msg) 1468{ 1469 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce2"); 1470 wpabuf_put_be16(msg, ATTR_R_SNONCE2); 1471 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN); 1472 wpabuf_put_data(msg, wps->snonce + WPS_SECRET_NONCE_LEN, 1473 WPS_SECRET_NONCE_LEN); 1474 return 0; 1475} 1476 1477 1478static int wps_build_cred_network_idx(struct wpabuf *msg, 1479 const struct wps_credential *cred) 1480{ 1481 wpa_printf(MSG_DEBUG, "WPS: * Network Index (1)"); 1482 wpabuf_put_be16(msg, ATTR_NETWORK_INDEX); 1483 wpabuf_put_be16(msg, 1); 1484 wpabuf_put_u8(msg, 1); 1485 return 0; 1486} 1487 1488 1489static int wps_build_cred_ssid(struct wpabuf *msg, 1490 const struct wps_credential *cred) 1491{ 1492 wpa_printf(MSG_DEBUG, "WPS: * SSID"); 1493 wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID for Credential", 1494 cred->ssid, cred->ssid_len); 1495 wpabuf_put_be16(msg, ATTR_SSID); 1496 wpabuf_put_be16(msg, cred->ssid_len); 1497 wpabuf_put_data(msg, cred->ssid, cred->ssid_len); 1498 return 0; 1499} 1500 1501 1502static int wps_build_cred_auth_type(struct wpabuf *msg, 1503 const struct wps_credential *cred) 1504{ 1505 wpa_printf(MSG_DEBUG, "WPS: * Authentication Type (0x%x)", 1506 cred->auth_type); 1507 wpabuf_put_be16(msg, ATTR_AUTH_TYPE); 1508 wpabuf_put_be16(msg, 2); 1509 wpabuf_put_be16(msg, cred->auth_type); 1510 return 0; 1511} 1512 1513 1514static int wps_build_cred_encr_type(struct wpabuf *msg, 1515 const struct wps_credential *cred) 1516{ 1517 wpa_printf(MSG_DEBUG, "WPS: * Encryption Type (0x%x)", 1518 cred->encr_type); 1519 wpabuf_put_be16(msg, ATTR_ENCR_TYPE); 1520 wpabuf_put_be16(msg, 2); 1521 wpabuf_put_be16(msg, cred->encr_type); 1522 return 0; 1523} 1524 1525 1526static int wps_build_cred_network_key(struct wpabuf *msg, 1527 const struct wps_credential *cred) 1528{ 1529 wpa_printf(MSG_DEBUG, "WPS: * Network Key (len=%d)", 1530 (int) cred->key_len); 1531 wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key", 1532 cred->key, cred->key_len); 1533 wpabuf_put_be16(msg, ATTR_NETWORK_KEY); 1534 wpabuf_put_be16(msg, cred->key_len); 1535 wpabuf_put_data(msg, cred->key, cred->key_len); 1536 return 0; 1537} 1538 1539 1540static int wps_build_credential(struct wpabuf *msg, 1541 const struct wps_credential *cred) 1542{ 1543 if (wps_build_cred_network_idx(msg, cred) || 1544 wps_build_cred_ssid(msg, cred) || 1545 wps_build_cred_auth_type(msg, cred) || 1546 wps_build_cred_encr_type(msg, cred) || 1547 wps_build_cred_network_key(msg, cred) || 1548 wps_build_mac_addr(msg, cred->mac_addr)) 1549 return -1; 1550 return 0; 1551} 1552 1553 1554int wps_build_credential_wrap(struct wpabuf *msg, 1555 const struct wps_credential *cred) 1556{ 1557 struct wpabuf *wbuf; 1558 wbuf = wpabuf_alloc(200); 1559 if (wbuf == NULL) 1560 return -1; 1561 if (wps_build_credential(wbuf, cred)) { 1562 wpabuf_free(wbuf); 1563 return -1; 1564 } 1565 wpabuf_put_be16(msg, ATTR_CRED); 1566 wpabuf_put_be16(msg, wpabuf_len(wbuf)); 1567 wpabuf_put_buf(msg, wbuf); 1568 wpabuf_free(wbuf); 1569 return 0; 1570} 1571 1572 1573int wps_build_cred(struct wps_data *wps, struct wpabuf *msg) 1574{ 1575 struct wpabuf *cred; 1576 1577 if (wps->wps->registrar->skip_cred_build) 1578 goto skip_cred_build; 1579 1580 wpa_printf(MSG_DEBUG, "WPS: * Credential"); 1581 if (wps->use_cred) { 1582 os_memcpy(&wps->cred, wps->use_cred, sizeof(wps->cred)); 1583 goto use_provided; 1584 } 1585 os_memset(&wps->cred, 0, sizeof(wps->cred)); 1586 1587 os_memcpy(wps->cred.ssid, wps->wps->ssid, wps->wps->ssid_len); 1588 wps->cred.ssid_len = wps->wps->ssid_len; 1589 1590 /* Select the best authentication and encryption type */ 1591 if (wps->auth_type & WPS_AUTH_WPA2PSK) 1592 wps->auth_type = WPS_AUTH_WPA2PSK; 1593 else if (wps->auth_type & WPS_AUTH_WPAPSK) 1594 wps->auth_type = WPS_AUTH_WPAPSK; 1595 else if (wps->auth_type & WPS_AUTH_OPEN) 1596 wps->auth_type = WPS_AUTH_OPEN; 1597 else if (wps->auth_type & WPS_AUTH_SHARED) 1598 wps->auth_type = WPS_AUTH_SHARED; 1599 else { 1600 wpa_printf(MSG_DEBUG, "WPS: Unsupported auth_type 0x%x", 1601 wps->auth_type); 1602 return -1; 1603 } 1604 wps->cred.auth_type = wps->auth_type; 1605 1606 if (wps->auth_type == WPS_AUTH_WPA2PSK || 1607 wps->auth_type == WPS_AUTH_WPAPSK) { 1608 if (wps->encr_type & WPS_ENCR_AES) 1609 wps->encr_type = WPS_ENCR_AES; 1610 else if (wps->encr_type & WPS_ENCR_TKIP) 1611 wps->encr_type = WPS_ENCR_TKIP; 1612 else { 1613 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption " 1614 "type for WPA/WPA2"); 1615 return -1; 1616 } 1617 } else { 1618 if (wps->encr_type & WPS_ENCR_WEP) 1619 wps->encr_type = WPS_ENCR_WEP; 1620 else if (wps->encr_type & WPS_ENCR_NONE) 1621 wps->encr_type = WPS_ENCR_NONE; 1622 else { 1623 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption " 1624 "type for non-WPA/WPA2 mode"); 1625 return -1; 1626 } 1627 } 1628 wps->cred.encr_type = wps->encr_type; 1629 /* 1630 * Set MAC address in the Credential to be the Enrollee's MAC address 1631 */ 1632 os_memcpy(wps->cred.mac_addr, wps->mac_addr_e, ETH_ALEN); 1633 1634 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->wps->ap && 1635 !wps->wps->registrar->disable_auto_conf) { 1636 u8 r[16]; 1637 /* Generate a random passphrase */ 1638 if (random_get_bytes(r, sizeof(r)) < 0) 1639 return -1; 1640 os_free(wps->new_psk); 1641 wps->new_psk = base64_encode(r, sizeof(r), &wps->new_psk_len); 1642 if (wps->new_psk == NULL) 1643 return -1; 1644 wps->new_psk_len--; /* remove newline */ 1645 while (wps->new_psk_len && 1646 wps->new_psk[wps->new_psk_len - 1] == '=') 1647 wps->new_psk_len--; 1648 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Generated passphrase", 1649 wps->new_psk, wps->new_psk_len); 1650 os_memcpy(wps->cred.key, wps->new_psk, wps->new_psk_len); 1651 wps->cred.key_len = wps->new_psk_len; 1652 } else if (!wps->wps->registrar->force_per_enrollee_psk && 1653 wps->use_psk_key && wps->wps->psk_set) { 1654 char hex[65]; 1655 wpa_printf(MSG_DEBUG, "WPS: Use PSK format for Network Key"); 1656 wpa_snprintf_hex(hex, sizeof(hex), wps->wps->psk, 32); 1657 os_memcpy(wps->cred.key, hex, 32 * 2); 1658 wps->cred.key_len = 32 * 2; 1659 } else if (!wps->wps->registrar->force_per_enrollee_psk && 1660 wps->wps->network_key) { 1661 os_memcpy(wps->cred.key, wps->wps->network_key, 1662 wps->wps->network_key_len); 1663 wps->cred.key_len = wps->wps->network_key_len; 1664 } else if (wps->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) { 1665 char hex[65]; 1666 /* Generate a random per-device PSK */ 1667 os_free(wps->new_psk); 1668 wps->new_psk_len = 32; 1669 wps->new_psk = os_malloc(wps->new_psk_len); 1670 if (wps->new_psk == NULL) 1671 return -1; 1672 if (random_get_bytes(wps->new_psk, wps->new_psk_len) < 0) { 1673 os_free(wps->new_psk); 1674 wps->new_psk = NULL; 1675 return -1; 1676 } 1677 wpa_hexdump_key(MSG_DEBUG, "WPS: Generated per-device PSK", 1678 wps->new_psk, wps->new_psk_len); 1679 wpa_snprintf_hex(hex, sizeof(hex), wps->new_psk, 1680 wps->new_psk_len); 1681 os_memcpy(wps->cred.key, hex, wps->new_psk_len * 2); 1682 wps->cred.key_len = wps->new_psk_len * 2; 1683 } 1684 1685use_provided: 1686#ifdef CONFIG_WPS_TESTING 1687 if (wps_testing_dummy_cred) 1688 cred = wpabuf_alloc(200); 1689 else 1690 cred = NULL; 1691 if (cred) { 1692 struct wps_credential dummy; 1693 wpa_printf(MSG_DEBUG, "WPS: Add dummy credential"); 1694 os_memset(&dummy, 0, sizeof(dummy)); 1695 os_memcpy(dummy.ssid, "dummy", 5); 1696 dummy.ssid_len = 5; 1697 dummy.auth_type = WPS_AUTH_WPA2PSK; 1698 dummy.encr_type = WPS_ENCR_AES; 1699 os_memcpy(dummy.key, "dummy psk", 9); 1700 dummy.key_len = 9; 1701 os_memcpy(dummy.mac_addr, wps->mac_addr_e, ETH_ALEN); 1702 wps_build_credential(cred, &dummy); 1703 wpa_hexdump_buf(MSG_DEBUG, "WPS: Dummy Credential", cred); 1704 1705 wpabuf_put_be16(msg, ATTR_CRED); 1706 wpabuf_put_be16(msg, wpabuf_len(cred)); 1707 wpabuf_put_buf(msg, cred); 1708 1709 wpabuf_free(cred); 1710 } 1711#endif /* CONFIG_WPS_TESTING */ 1712 1713 cred = wpabuf_alloc(200); 1714 if (cred == NULL) 1715 return -1; 1716 1717 if (wps_build_credential(cred, &wps->cred)) { 1718 wpabuf_free(cred); 1719 return -1; 1720 } 1721 1722 wpabuf_put_be16(msg, ATTR_CRED); 1723 wpabuf_put_be16(msg, wpabuf_len(cred)); 1724 wpabuf_put_buf(msg, cred); 1725 wpabuf_free(cred); 1726 1727skip_cred_build: 1728 if (wps->wps->registrar->extra_cred) { 1729 wpa_printf(MSG_DEBUG, "WPS: * Credential (pre-configured)"); 1730 wpabuf_put_buf(msg, wps->wps->registrar->extra_cred); 1731 } 1732 1733 return 0; 1734} 1735 1736 1737static int wps_build_ap_settings(struct wps_data *wps, struct wpabuf *msg) 1738{ 1739 wpa_printf(MSG_DEBUG, "WPS: * AP Settings"); 1740 1741 if (wps_build_credential(msg, &wps->cred)) 1742 return -1; 1743 1744 return 0; 1745} 1746 1747 1748static struct wpabuf * wps_build_ap_cred(struct wps_data *wps) 1749{ 1750 struct wpabuf *msg, *plain; 1751 1752 msg = wpabuf_alloc(1000); 1753 if (msg == NULL) 1754 return NULL; 1755 1756 plain = wpabuf_alloc(200); 1757 if (plain == NULL) { 1758 wpabuf_free(msg); 1759 return NULL; 1760 } 1761 1762 if (wps_build_ap_settings(wps, plain)) { 1763 wpabuf_free(plain); 1764 wpabuf_free(msg); 1765 return NULL; 1766 } 1767 1768 wpabuf_put_be16(msg, ATTR_CRED); 1769 wpabuf_put_be16(msg, wpabuf_len(plain)); 1770 wpabuf_put_buf(msg, plain); 1771 wpabuf_free(plain); 1772 1773 return msg; 1774} 1775 1776 1777static struct wpabuf * wps_build_m2(struct wps_data *wps) 1778{ 1779 struct wpabuf *msg; 1780 1781 if (random_get_bytes(wps->nonce_r, WPS_NONCE_LEN) < 0) 1782 return NULL; 1783 wpa_hexdump(MSG_DEBUG, "WPS: Registrar Nonce", 1784 wps->nonce_r, WPS_NONCE_LEN); 1785 wpa_hexdump(MSG_DEBUG, "WPS: UUID-R", wps->uuid_r, WPS_UUID_LEN); 1786 1787 wpa_printf(MSG_DEBUG, "WPS: Building Message M2"); 1788 msg = wpabuf_alloc(1000); 1789 if (msg == NULL) 1790 return NULL; 1791 1792 if (wps_build_version(msg) || 1793 wps_build_msg_type(msg, WPS_M2) || 1794 wps_build_enrollee_nonce(wps, msg) || 1795 wps_build_registrar_nonce(wps, msg) || 1796 wps_build_uuid_r(wps, msg) || 1797 wps_build_public_key(wps, msg) || 1798 wps_derive_keys(wps) || 1799 wps_build_auth_type_flags(wps, msg) || 1800 wps_build_encr_type_flags(wps, msg) || 1801 wps_build_conn_type_flags(wps, msg) || 1802 wps_build_config_methods_r(wps->wps->registrar, msg) || 1803 wps_build_device_attrs(&wps->wps->dev, msg) || 1804 wps_build_rf_bands(&wps->wps->dev, msg, 1805 wps->wps->rf_band_cb(wps->wps->cb_ctx)) || 1806 wps_build_assoc_state(wps, msg) || 1807 wps_build_config_error(msg, WPS_CFG_NO_ERROR) || 1808 wps_build_dev_password_id(msg, wps->dev_pw_id) || 1809 wps_build_os_version(&wps->wps->dev, msg) || 1810 wps_build_wfa_ext(msg, 0, NULL, 0) || 1811 wps_build_authenticator(wps, msg)) { 1812 wpabuf_free(msg); 1813 return NULL; 1814 } 1815 1816 wps->int_reg = 1; 1817 wps->state = RECV_M3; 1818 return msg; 1819} 1820 1821 1822static struct wpabuf * wps_build_m2d(struct wps_data *wps) 1823{ 1824 struct wpabuf *msg; 1825 u16 err = wps->config_error; 1826 1827 wpa_printf(MSG_DEBUG, "WPS: Building Message M2D"); 1828 msg = wpabuf_alloc(1000); 1829 if (msg == NULL) 1830 return NULL; 1831 1832 if (wps->wps->ap && wps->wps->ap_setup_locked && 1833 err == WPS_CFG_NO_ERROR) 1834 err = WPS_CFG_SETUP_LOCKED; 1835 1836 if (wps_build_version(msg) || 1837 wps_build_msg_type(msg, WPS_M2D) || 1838 wps_build_enrollee_nonce(wps, msg) || 1839 wps_build_registrar_nonce(wps, msg) || 1840 wps_build_uuid_r(wps, msg) || 1841 wps_build_auth_type_flags(wps, msg) || 1842 wps_build_encr_type_flags(wps, msg) || 1843 wps_build_conn_type_flags(wps, msg) || 1844 wps_build_config_methods_r(wps->wps->registrar, msg) || 1845 wps_build_device_attrs(&wps->wps->dev, msg) || 1846 wps_build_rf_bands(&wps->wps->dev, msg, 1847 wps->wps->rf_band_cb(wps->wps->cb_ctx)) || 1848 wps_build_assoc_state(wps, msg) || 1849 wps_build_config_error(msg, err) || 1850 wps_build_os_version(&wps->wps->dev, msg) || 1851 wps_build_wfa_ext(msg, 0, NULL, 0)) { 1852 wpabuf_free(msg); 1853 return NULL; 1854 } 1855 1856 wps->state = RECV_M2D_ACK; 1857 return msg; 1858} 1859 1860 1861static struct wpabuf * wps_build_m4(struct wps_data *wps) 1862{ 1863 struct wpabuf *msg, *plain; 1864 1865 wpa_printf(MSG_DEBUG, "WPS: Building Message M4"); 1866 1867 wps_derive_psk(wps, wps->dev_password, wps->dev_password_len); 1868 1869 plain = wpabuf_alloc(200); 1870 if (plain == NULL) 1871 return NULL; 1872 1873 msg = wpabuf_alloc(1000); 1874 if (msg == NULL) { 1875 wpabuf_free(plain); 1876 return NULL; 1877 } 1878 1879 if (wps_build_version(msg) || 1880 wps_build_msg_type(msg, WPS_M4) || 1881 wps_build_enrollee_nonce(wps, msg) || 1882 wps_build_r_hash(wps, msg) || 1883 wps_build_r_snonce1(wps, plain) || 1884 wps_build_key_wrap_auth(wps, plain) || 1885 wps_build_encr_settings(wps, msg, plain) || 1886 wps_build_wfa_ext(msg, 0, NULL, 0) || 1887 wps_build_authenticator(wps, msg)) { 1888 wpabuf_free(plain); 1889 wpabuf_free(msg); 1890 return NULL; 1891 } 1892 wpabuf_free(plain); 1893 1894 wps->state = RECV_M5; 1895 return msg; 1896} 1897 1898 1899static struct wpabuf * wps_build_m6(struct wps_data *wps) 1900{ 1901 struct wpabuf *msg, *plain; 1902 1903 wpa_printf(MSG_DEBUG, "WPS: Building Message M6"); 1904 1905 plain = wpabuf_alloc(200); 1906 if (plain == NULL) 1907 return NULL; 1908 1909 msg = wpabuf_alloc(1000); 1910 if (msg == NULL) { 1911 wpabuf_free(plain); 1912 return NULL; 1913 } 1914 1915 if (wps_build_version(msg) || 1916 wps_build_msg_type(msg, WPS_M6) || 1917 wps_build_enrollee_nonce(wps, msg) || 1918 wps_build_r_snonce2(wps, plain) || 1919 wps_build_key_wrap_auth(wps, plain) || 1920 wps_build_encr_settings(wps, msg, plain) || 1921 wps_build_wfa_ext(msg, 0, NULL, 0) || 1922 wps_build_authenticator(wps, msg)) { 1923 wpabuf_free(plain); 1924 wpabuf_free(msg); 1925 return NULL; 1926 } 1927 wpabuf_free(plain); 1928 1929 wps->wps_pin_revealed = 1; 1930 wps->state = RECV_M7; 1931 return msg; 1932} 1933 1934 1935static struct wpabuf * wps_build_m8(struct wps_data *wps) 1936{ 1937 struct wpabuf *msg, *plain; 1938 1939 wpa_printf(MSG_DEBUG, "WPS: Building Message M8"); 1940 1941 plain = wpabuf_alloc(500); 1942 if (plain == NULL) 1943 return NULL; 1944 1945 msg = wpabuf_alloc(1000); 1946 if (msg == NULL) { 1947 wpabuf_free(plain); 1948 return NULL; 1949 } 1950 1951 if (wps_build_version(msg) || 1952 wps_build_msg_type(msg, WPS_M8) || 1953 wps_build_enrollee_nonce(wps, msg) || 1954 ((wps->wps->ap || wps->er) && wps_build_cred(wps, plain)) || 1955 (!wps->wps->ap && !wps->er && wps_build_ap_settings(wps, plain)) || 1956 wps_build_key_wrap_auth(wps, plain) || 1957 wps_build_encr_settings(wps, msg, plain) || 1958 wps_build_wfa_ext(msg, 0, NULL, 0) || 1959 wps_build_authenticator(wps, msg)) { 1960 wpabuf_free(plain); 1961 wpabuf_free(msg); 1962 return NULL; 1963 } 1964 wpabuf_free(plain); 1965 1966 wps->state = RECV_DONE; 1967 return msg; 1968} 1969 1970 1971struct wpabuf * wps_registrar_get_msg(struct wps_data *wps, 1972 enum wsc_op_code *op_code) 1973{ 1974 struct wpabuf *msg; 1975 1976#ifdef CONFIG_WPS_UPNP 1977 if (!wps->int_reg && wps->wps->wps_upnp) { 1978 struct upnp_pending_message *p, *prev = NULL; 1979 if (wps->ext_reg > 1) 1980 wps_registrar_free_pending_m2(wps->wps); 1981 p = wps->wps->upnp_msgs; 1982 /* TODO: check pending message MAC address */ 1983 while (p && p->next) { 1984 prev = p; 1985 p = p->next; 1986 } 1987 if (p) { 1988 wpa_printf(MSG_DEBUG, "WPS: Use pending message from " 1989 "UPnP"); 1990 if (prev) 1991 prev->next = NULL; 1992 else 1993 wps->wps->upnp_msgs = NULL; 1994 msg = p->msg; 1995 switch (p->type) { 1996 case WPS_WSC_ACK: 1997 *op_code = WSC_ACK; 1998 break; 1999 case WPS_WSC_NACK: 2000 *op_code = WSC_NACK; 2001 break; 2002 default: 2003 *op_code = WSC_MSG; 2004 break; 2005 } 2006 os_free(p); 2007 if (wps->ext_reg == 0) 2008 wps->ext_reg = 1; 2009 return msg; 2010 } 2011 } 2012 if (wps->ext_reg) { 2013 wpa_printf(MSG_DEBUG, "WPS: Using external Registrar, but no " 2014 "pending message available"); 2015 return NULL; 2016 } 2017#endif /* CONFIG_WPS_UPNP */ 2018 2019 switch (wps->state) { 2020 case SEND_M2: 2021 if (wps_get_dev_password(wps) < 0) 2022 msg = wps_build_m2d(wps); 2023 else 2024 msg = wps_build_m2(wps); 2025 *op_code = WSC_MSG; 2026 break; 2027 case SEND_M2D: 2028 msg = wps_build_m2d(wps); 2029 *op_code = WSC_MSG; 2030 break; 2031 case SEND_M4: 2032 msg = wps_build_m4(wps); 2033 *op_code = WSC_MSG; 2034 break; 2035 case SEND_M6: 2036 msg = wps_build_m6(wps); 2037 *op_code = WSC_MSG; 2038 break; 2039 case SEND_M8: 2040 msg = wps_build_m8(wps); 2041 *op_code = WSC_MSG; 2042 break; 2043 case RECV_DONE: 2044 msg = wps_build_wsc_ack(wps); 2045 *op_code = WSC_ACK; 2046 break; 2047 case SEND_WSC_NACK: 2048 msg = wps_build_wsc_nack(wps); 2049 *op_code = WSC_NACK; 2050 break; 2051 default: 2052 wpa_printf(MSG_DEBUG, "WPS: Unsupported state %d for building " 2053 "a message", wps->state); 2054 msg = NULL; 2055 break; 2056 } 2057 2058 if (*op_code == WSC_MSG && msg) { 2059 /* Save a copy of the last message for Authenticator derivation 2060 */ 2061 wpabuf_free(wps->last_msg); 2062 wps->last_msg = wpabuf_dup(msg); 2063 } 2064 2065 return msg; 2066} 2067 2068 2069static int wps_process_enrollee_nonce(struct wps_data *wps, const u8 *e_nonce) 2070{ 2071 if (e_nonce == NULL) { 2072 wpa_printf(MSG_DEBUG, "WPS: No Enrollee Nonce received"); 2073 return -1; 2074 } 2075 2076 os_memcpy(wps->nonce_e, e_nonce, WPS_NONCE_LEN); 2077 wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce", 2078 wps->nonce_e, WPS_NONCE_LEN); 2079 2080 return 0; 2081} 2082 2083 2084static int wps_process_registrar_nonce(struct wps_data *wps, const u8 *r_nonce) 2085{ 2086 if (r_nonce == NULL) { 2087 wpa_printf(MSG_DEBUG, "WPS: No Registrar Nonce received"); 2088 return -1; 2089 } 2090 2091 if (os_memcmp(wps->nonce_r, r_nonce, WPS_NONCE_LEN) != 0) { 2092 wpa_printf(MSG_DEBUG, "WPS: Invalid Registrar Nonce received"); 2093 return -1; 2094 } 2095 2096 return 0; 2097} 2098 2099 2100static int wps_process_uuid_e(struct wps_data *wps, const u8 *uuid_e) 2101{ 2102 if (uuid_e == NULL) { 2103 wpa_printf(MSG_DEBUG, "WPS: No UUID-E received"); 2104 return -1; 2105 } 2106 2107 os_memcpy(wps->uuid_e, uuid_e, WPS_UUID_LEN); 2108 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", wps->uuid_e, WPS_UUID_LEN); 2109 2110 return 0; 2111} 2112 2113 2114static int wps_process_dev_password_id(struct wps_data *wps, const u8 *pw_id) 2115{ 2116 if (pw_id == NULL) { 2117 wpa_printf(MSG_DEBUG, "WPS: No Device Password ID received"); 2118 return -1; 2119 } 2120 2121 wps->dev_pw_id = WPA_GET_BE16(pw_id); 2122 wpa_printf(MSG_DEBUG, "WPS: Device Password ID %d", wps->dev_pw_id); 2123 2124 return 0; 2125} 2126 2127 2128static int wps_process_e_hash1(struct wps_data *wps, const u8 *e_hash1) 2129{ 2130 if (e_hash1 == NULL) { 2131 wpa_printf(MSG_DEBUG, "WPS: No E-Hash1 received"); 2132 return -1; 2133 } 2134 2135 os_memcpy(wps->peer_hash1, e_hash1, WPS_HASH_LEN); 2136 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash1", wps->peer_hash1, WPS_HASH_LEN); 2137 2138 return 0; 2139} 2140 2141 2142static int wps_process_e_hash2(struct wps_data *wps, const u8 *e_hash2) 2143{ 2144 if (e_hash2 == NULL) { 2145 wpa_printf(MSG_DEBUG, "WPS: No E-Hash2 received"); 2146 return -1; 2147 } 2148 2149 os_memcpy(wps->peer_hash2, e_hash2, WPS_HASH_LEN); 2150 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash2", wps->peer_hash2, WPS_HASH_LEN); 2151 2152 return 0; 2153} 2154 2155 2156static int wps_process_e_snonce1(struct wps_data *wps, const u8 *e_snonce1) 2157{ 2158 u8 hash[SHA256_MAC_LEN]; 2159 const u8 *addr[4]; 2160 size_t len[4]; 2161 2162 if (e_snonce1 == NULL) { 2163 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce1 received"); 2164 return -1; 2165 } 2166 2167 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce1", e_snonce1, 2168 WPS_SECRET_NONCE_LEN); 2169 2170 /* E-Hash1 = HMAC_AuthKey(E-S1 || PSK1 || PK_E || PK_R) */ 2171 addr[0] = e_snonce1; 2172 len[0] = WPS_SECRET_NONCE_LEN; 2173 addr[1] = wps->psk1; 2174 len[1] = WPS_PSK_LEN; 2175 addr[2] = wpabuf_head(wps->dh_pubkey_e); 2176 len[2] = wpabuf_len(wps->dh_pubkey_e); 2177 addr[3] = wpabuf_head(wps->dh_pubkey_r); 2178 len[3] = wpabuf_len(wps->dh_pubkey_r); 2179 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 2180 2181 if (os_memcmp(wps->peer_hash1, hash, WPS_HASH_LEN) != 0) { 2182 wpa_printf(MSG_DEBUG, "WPS: E-Hash1 derived from E-S1 does " 2183 "not match with the pre-committed value"); 2184 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE; 2185 wps_pwd_auth_fail_event(wps->wps, 0, 1, wps->mac_addr_e); 2186 return -1; 2187 } 2188 2189 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the first " 2190 "half of the device password"); 2191 2192 return 0; 2193} 2194 2195 2196static int wps_process_e_snonce2(struct wps_data *wps, const u8 *e_snonce2) 2197{ 2198 u8 hash[SHA256_MAC_LEN]; 2199 const u8 *addr[4]; 2200 size_t len[4]; 2201 2202 if (e_snonce2 == NULL) { 2203 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce2 received"); 2204 return -1; 2205 } 2206 2207 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce2", e_snonce2, 2208 WPS_SECRET_NONCE_LEN); 2209 2210 /* E-Hash2 = HMAC_AuthKey(E-S2 || PSK2 || PK_E || PK_R) */ 2211 addr[0] = e_snonce2; 2212 len[0] = WPS_SECRET_NONCE_LEN; 2213 addr[1] = wps->psk2; 2214 len[1] = WPS_PSK_LEN; 2215 addr[2] = wpabuf_head(wps->dh_pubkey_e); 2216 len[2] = wpabuf_len(wps->dh_pubkey_e); 2217 addr[3] = wpabuf_head(wps->dh_pubkey_r); 2218 len[3] = wpabuf_len(wps->dh_pubkey_r); 2219 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 2220 2221 if (os_memcmp(wps->peer_hash2, hash, WPS_HASH_LEN) != 0) { 2222 wpa_printf(MSG_DEBUG, "WPS: E-Hash2 derived from E-S2 does " 2223 "not match with the pre-committed value"); 2224 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e); 2225 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE; 2226 wps_pwd_auth_fail_event(wps->wps, 0, 2, wps->mac_addr_e); 2227 return -1; 2228 } 2229 2230 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the second " 2231 "half of the device password"); 2232 wps->wps_pin_revealed = 0; 2233 wps_registrar_unlock_pin(wps->wps->registrar, wps->uuid_e); 2234 2235 /* 2236 * In case wildcard PIN is used and WPS handshake succeeds in the first 2237 * attempt, wps_registrar_unlock_pin() would not free the PIN, so make 2238 * sure the PIN gets invalidated here. 2239 */ 2240 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e); 2241 2242 return 0; 2243} 2244 2245 2246static int wps_process_mac_addr(struct wps_data *wps, const u8 *mac_addr) 2247{ 2248 if (mac_addr == NULL) { 2249 wpa_printf(MSG_DEBUG, "WPS: No MAC Address received"); 2250 return -1; 2251 } 2252 2253 wpa_printf(MSG_DEBUG, "WPS: Enrollee MAC Address " MACSTR, 2254 MAC2STR(mac_addr)); 2255 os_memcpy(wps->mac_addr_e, mac_addr, ETH_ALEN); 2256 os_memcpy(wps->peer_dev.mac_addr, mac_addr, ETH_ALEN); 2257 2258 return 0; 2259} 2260 2261 2262static int wps_process_pubkey(struct wps_data *wps, const u8 *pk, 2263 size_t pk_len) 2264{ 2265 if (pk == NULL || pk_len == 0) { 2266 wpa_printf(MSG_DEBUG, "WPS: No Public Key received"); 2267 return -1; 2268 } 2269 2270 wpabuf_free(wps->dh_pubkey_e); 2271 wps->dh_pubkey_e = wpabuf_alloc_copy(pk, pk_len); 2272 if (wps->dh_pubkey_e == NULL) 2273 return -1; 2274 2275 return 0; 2276} 2277 2278 2279static int wps_process_auth_type_flags(struct wps_data *wps, const u8 *auth) 2280{ 2281 u16 auth_types; 2282 2283 if (auth == NULL) { 2284 wpa_printf(MSG_DEBUG, "WPS: No Authentication Type flags " 2285 "received"); 2286 return -1; 2287 } 2288 2289 auth_types = WPA_GET_BE16(auth); 2290 2291 wpa_printf(MSG_DEBUG, "WPS: Enrollee Authentication Type flags 0x%x", 2292 auth_types); 2293 wps->auth_type = wps->wps->auth_types & auth_types; 2294 if (wps->auth_type == 0) { 2295 wpa_printf(MSG_DEBUG, "WPS: No match in supported " 2296 "authentication types (own 0x%x Enrollee 0x%x)", 2297 wps->wps->auth_types, auth_types); 2298#ifdef WPS_WORKAROUNDS 2299 /* 2300 * Some deployed implementations seem to advertise incorrect 2301 * information in this attribute. For example, Linksys WRT350N 2302 * seems to have a byteorder bug that breaks this negotiation. 2303 * In order to interoperate with existing implementations, 2304 * assume that the Enrollee supports everything we do. 2305 */ 2306 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee " 2307 "does not advertise supported authentication types " 2308 "correctly"); 2309 wps->auth_type = wps->wps->auth_types; 2310#else /* WPS_WORKAROUNDS */ 2311 return -1; 2312#endif /* WPS_WORKAROUNDS */ 2313 } 2314 2315 return 0; 2316} 2317 2318 2319static int wps_process_encr_type_flags(struct wps_data *wps, const u8 *encr) 2320{ 2321 u16 encr_types; 2322 2323 if (encr == NULL) { 2324 wpa_printf(MSG_DEBUG, "WPS: No Encryption Type flags " 2325 "received"); 2326 return -1; 2327 } 2328 2329 encr_types = WPA_GET_BE16(encr); 2330 2331 wpa_printf(MSG_DEBUG, "WPS: Enrollee Encryption Type flags 0x%x", 2332 encr_types); 2333 wps->encr_type = wps->wps->encr_types & encr_types; 2334 if (wps->encr_type == 0) { 2335 wpa_printf(MSG_DEBUG, "WPS: No match in supported " 2336 "encryption types (own 0x%x Enrollee 0x%x)", 2337 wps->wps->encr_types, encr_types); 2338#ifdef WPS_WORKAROUNDS 2339 /* 2340 * Some deployed implementations seem to advertise incorrect 2341 * information in this attribute. For example, Linksys WRT350N 2342 * seems to have a byteorder bug that breaks this negotiation. 2343 * In order to interoperate with existing implementations, 2344 * assume that the Enrollee supports everything we do. 2345 */ 2346 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee " 2347 "does not advertise supported encryption types " 2348 "correctly"); 2349 wps->encr_type = wps->wps->encr_types; 2350#else /* WPS_WORKAROUNDS */ 2351 return -1; 2352#endif /* WPS_WORKAROUNDS */ 2353 } 2354 2355 return 0; 2356} 2357 2358 2359static int wps_process_conn_type_flags(struct wps_data *wps, const u8 *conn) 2360{ 2361 if (conn == NULL) { 2362 wpa_printf(MSG_DEBUG, "WPS: No Connection Type flags " 2363 "received"); 2364 return -1; 2365 } 2366 2367 wpa_printf(MSG_DEBUG, "WPS: Enrollee Connection Type flags 0x%x", 2368 *conn); 2369 2370 return 0; 2371} 2372 2373 2374static int wps_process_config_methods(struct wps_data *wps, const u8 *methods) 2375{ 2376 u16 m; 2377 2378 if (methods == NULL) { 2379 wpa_printf(MSG_DEBUG, "WPS: No Config Methods received"); 2380 return -1; 2381 } 2382 2383 m = WPA_GET_BE16(methods); 2384 2385 wpa_printf(MSG_DEBUG, "WPS: Enrollee Config Methods 0x%x" 2386 "%s%s%s%s%s%s%s%s%s", m, 2387 m & WPS_CONFIG_USBA ? " [USBA]" : "", 2388 m & WPS_CONFIG_ETHERNET ? " [Ethernet]" : "", 2389 m & WPS_CONFIG_LABEL ? " [Label]" : "", 2390 m & WPS_CONFIG_DISPLAY ? " [Display]" : "", 2391 m & WPS_CONFIG_EXT_NFC_TOKEN ? " [Ext NFC Token]" : "", 2392 m & WPS_CONFIG_INT_NFC_TOKEN ? " [Int NFC Token]" : "", 2393 m & WPS_CONFIG_NFC_INTERFACE ? " [NFC]" : "", 2394 m & WPS_CONFIG_PUSHBUTTON ? " [PBC]" : "", 2395 m & WPS_CONFIG_KEYPAD ? " [Keypad]" : ""); 2396 2397 if (!(m & WPS_CONFIG_DISPLAY) && !wps->use_psk_key) { 2398 /* 2399 * The Enrollee does not have a display so it is unlikely to be 2400 * able to show the passphrase to a user and as such, could 2401 * benefit from receiving PSK to reduce key derivation time. 2402 */ 2403 wpa_printf(MSG_DEBUG, "WPS: Prefer PSK format key due to " 2404 "Enrollee not supporting display"); 2405 wps->use_psk_key = 1; 2406 } 2407 2408 return 0; 2409} 2410 2411 2412static int wps_process_wps_state(struct wps_data *wps, const u8 *state) 2413{ 2414 if (state == NULL) { 2415 wpa_printf(MSG_DEBUG, "WPS: No Wi-Fi Protected Setup State " 2416 "received"); 2417 return -1; 2418 } 2419 2420 wpa_printf(MSG_DEBUG, "WPS: Enrollee Wi-Fi Protected Setup State %d", 2421 *state); 2422 2423 return 0; 2424} 2425 2426 2427static int wps_process_assoc_state(struct wps_data *wps, const u8 *assoc) 2428{ 2429 u16 a; 2430 2431 if (assoc == NULL) { 2432 wpa_printf(MSG_DEBUG, "WPS: No Association State received"); 2433 return -1; 2434 } 2435 2436 a = WPA_GET_BE16(assoc); 2437 wpa_printf(MSG_DEBUG, "WPS: Enrollee Association State %d", a); 2438 2439 return 0; 2440} 2441 2442 2443static int wps_process_config_error(struct wps_data *wps, const u8 *err) 2444{ 2445 u16 e; 2446 2447 if (err == NULL) { 2448 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error received"); 2449 return -1; 2450 } 2451 2452 e = WPA_GET_BE16(err); 2453 wpa_printf(MSG_DEBUG, "WPS: Enrollee Configuration Error %d", e); 2454 2455 return 0; 2456} 2457 2458 2459static int wps_registrar_p2p_dev_addr_match(struct wps_data *wps) 2460{ 2461#ifdef CONFIG_P2P 2462 struct wps_registrar *reg = wps->wps->registrar; 2463 2464 if (is_zero_ether_addr(reg->p2p_dev_addr)) 2465 return 1; /* no filtering in use */ 2466 2467 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) != 0) { 2468 wpa_printf(MSG_DEBUG, "WPS: No match on P2P Device Address " 2469 "filtering for PBC: expected " MACSTR " was " 2470 MACSTR " - indicate PBC session overlap", 2471 MAC2STR(reg->p2p_dev_addr), 2472 MAC2STR(wps->p2p_dev_addr)); 2473 return 0; 2474 } 2475#endif /* CONFIG_P2P */ 2476 return 1; 2477} 2478 2479 2480static int wps_registrar_skip_overlap(struct wps_data *wps) 2481{ 2482#ifdef CONFIG_P2P 2483 struct wps_registrar *reg = wps->wps->registrar; 2484 2485 if (is_zero_ether_addr(reg->p2p_dev_addr)) 2486 return 0; /* no specific Enrollee selected */ 2487 2488 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) == 0) { 2489 wpa_printf(MSG_DEBUG, "WPS: Skip PBC overlap due to selected " 2490 "Enrollee match"); 2491 return 1; 2492 } 2493#endif /* CONFIG_P2P */ 2494 return 0; 2495} 2496 2497 2498static enum wps_process_res wps_process_m1(struct wps_data *wps, 2499 struct wps_parse_attr *attr) 2500{ 2501 wpa_printf(MSG_DEBUG, "WPS: Received M1"); 2502 2503 if (wps->state != RECV_M1) { 2504 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2505 "receiving M1", wps->state); 2506 return WPS_FAILURE; 2507 } 2508 2509 if (wps_process_uuid_e(wps, attr->uuid_e) || 2510 wps_process_mac_addr(wps, attr->mac_addr) || 2511 wps_process_enrollee_nonce(wps, attr->enrollee_nonce) || 2512 wps_process_pubkey(wps, attr->public_key, attr->public_key_len) || 2513 wps_process_auth_type_flags(wps, attr->auth_type_flags) || 2514 wps_process_encr_type_flags(wps, attr->encr_type_flags) || 2515 wps_process_conn_type_flags(wps, attr->conn_type_flags) || 2516 wps_process_config_methods(wps, attr->config_methods) || 2517 wps_process_wps_state(wps, attr->wps_state) || 2518 wps_process_device_attrs(&wps->peer_dev, attr) || 2519 wps_process_rf_bands(&wps->peer_dev, attr->rf_bands) || 2520 wps_process_assoc_state(wps, attr->assoc_state) || 2521 wps_process_dev_password_id(wps, attr->dev_password_id) || 2522 wps_process_config_error(wps, attr->config_error) || 2523 wps_process_os_version(&wps->peer_dev, attr->os_version)) 2524 return WPS_FAILURE; 2525 2526 if (wps->dev_pw_id < 0x10 && 2527 wps->dev_pw_id != DEV_PW_DEFAULT && 2528 wps->dev_pw_id != DEV_PW_USER_SPECIFIED && 2529 wps->dev_pw_id != DEV_PW_MACHINE_SPECIFIED && 2530 wps->dev_pw_id != DEV_PW_REGISTRAR_SPECIFIED && 2531 (wps->dev_pw_id != DEV_PW_PUSHBUTTON || 2532 !wps->wps->registrar->pbc)) { 2533 wpa_printf(MSG_DEBUG, "WPS: Unsupported Device Password ID %d", 2534 wps->dev_pw_id); 2535 wps->state = SEND_M2D; 2536 return WPS_CONTINUE; 2537 } 2538 2539#ifdef CONFIG_WPS_NFC 2540 if (wps->dev_pw_id >= 0x10) { 2541 struct wps_nfc_pw_token *token; 2542 const u8 *addr[1]; 2543 u8 hash[WPS_HASH_LEN]; 2544 2545 wpa_printf(MSG_DEBUG, "WPS: Searching for NFC token match for id=%d (ctx %p registrar %p)", 2546 wps->dev_pw_id, wps->wps, wps->wps->registrar); 2547 token = wps_get_nfc_pw_token( 2548 &wps->wps->registrar->nfc_pw_tokens, wps->dev_pw_id); 2549 if (token) { 2550 wpa_printf(MSG_DEBUG, "WPS: Found matching NFC " 2551 "Password Token"); 2552 dl_list_del(&token->list); 2553 wps->nfc_pw_token = token; 2554 2555 addr[0] = attr->public_key; 2556 sha256_vector(1, addr, &attr->public_key_len, hash); 2557 if (os_memcmp(hash, wps->nfc_pw_token->pubkey_hash, 2558 WPS_OOB_PUBKEY_HASH_LEN) != 0) { 2559 wpa_printf(MSG_ERROR, "WPS: Public Key hash " 2560 "mismatch"); 2561 return WPS_FAILURE; 2562 } 2563 } 2564 } 2565#endif /* CONFIG_WPS_NFC */ 2566 2567 if (wps->dev_pw_id == DEV_PW_PUSHBUTTON) { 2568 if ((wps->wps->registrar->force_pbc_overlap || 2569 wps_registrar_pbc_overlap(wps->wps->registrar, 2570 wps->mac_addr_e, wps->uuid_e) || 2571 !wps_registrar_p2p_dev_addr_match(wps)) && 2572 !wps_registrar_skip_overlap(wps)) { 2573 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - deny PBC " 2574 "negotiation"); 2575 wps->state = SEND_M2D; 2576 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2577 wps_pbc_overlap_event(wps->wps); 2578 wps_fail_event(wps->wps, WPS_M1, 2579 WPS_CFG_MULTIPLE_PBC_DETECTED, 2580 WPS_EI_NO_ERROR, wps->mac_addr_e); 2581 wps->wps->registrar->force_pbc_overlap = 1; 2582 return WPS_CONTINUE; 2583 } 2584 wps_registrar_add_pbc_session(wps->wps->registrar, 2585 wps->mac_addr_e, wps->uuid_e); 2586 wps->pbc = 1; 2587 } 2588 2589#ifdef WPS_WORKAROUNDS 2590 /* 2591 * It looks like Mac OS X 10.6.3 and 10.6.4 do not like Network Key in 2592 * passphrase format. To avoid interop issues, force PSK format to be 2593 * used. 2594 */ 2595 if (!wps->use_psk_key && 2596 wps->peer_dev.manufacturer && 2597 os_strncmp(wps->peer_dev.manufacturer, "Apple ", 6) == 0 && 2598 wps->peer_dev.model_name && 2599 os_strcmp(wps->peer_dev.model_name, "AirPort") == 0) { 2600 wpa_printf(MSG_DEBUG, "WPS: Workaround - Force Network Key in " 2601 "PSK format"); 2602 wps->use_psk_key = 1; 2603 } 2604#endif /* WPS_WORKAROUNDS */ 2605 2606 wps->state = SEND_M2; 2607 return WPS_CONTINUE; 2608} 2609 2610 2611static enum wps_process_res wps_process_m3(struct wps_data *wps, 2612 const struct wpabuf *msg, 2613 struct wps_parse_attr *attr) 2614{ 2615 wpa_printf(MSG_DEBUG, "WPS: Received M3"); 2616 2617 if (wps->state != RECV_M3) { 2618 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2619 "receiving M3", wps->state); 2620 wps->state = SEND_WSC_NACK; 2621 return WPS_CONTINUE; 2622 } 2623 2624 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2625 !wps_registrar_skip_overlap(wps)) { 2626 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2627 "session overlap"); 2628 wps->state = SEND_WSC_NACK; 2629 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2630 return WPS_CONTINUE; 2631 } 2632 2633 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2634 wps_process_authenticator(wps, attr->authenticator, msg) || 2635 wps_process_e_hash1(wps, attr->e_hash1) || 2636 wps_process_e_hash2(wps, attr->e_hash2)) { 2637 wps->state = SEND_WSC_NACK; 2638 return WPS_CONTINUE; 2639 } 2640 2641 wps->state = SEND_M4; 2642 return WPS_CONTINUE; 2643} 2644 2645 2646static enum wps_process_res wps_process_m5(struct wps_data *wps, 2647 const struct wpabuf *msg, 2648 struct wps_parse_attr *attr) 2649{ 2650 struct wpabuf *decrypted; 2651 struct wps_parse_attr eattr; 2652 2653 wpa_printf(MSG_DEBUG, "WPS: Received M5"); 2654 2655 if (wps->state != RECV_M5) { 2656 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2657 "receiving M5", wps->state); 2658 wps->state = SEND_WSC_NACK; 2659 return WPS_CONTINUE; 2660 } 2661 2662 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2663 !wps_registrar_skip_overlap(wps)) { 2664 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2665 "session overlap"); 2666 wps->state = SEND_WSC_NACK; 2667 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2668 return WPS_CONTINUE; 2669 } 2670 2671 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2672 wps_process_authenticator(wps, attr->authenticator, msg)) { 2673 wps->state = SEND_WSC_NACK; 2674 return WPS_CONTINUE; 2675 } 2676 2677 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings, 2678 attr->encr_settings_len); 2679 if (decrypted == NULL) { 2680 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted " 2681 "Settings attribute"); 2682 wps->state = SEND_WSC_NACK; 2683 return WPS_CONTINUE; 2684 } 2685 2686 if (wps_validate_m5_encr(decrypted, attr->version2 != NULL) < 0) { 2687 wpabuf_free(decrypted); 2688 wps->state = SEND_WSC_NACK; 2689 return WPS_CONTINUE; 2690 } 2691 2692 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings " 2693 "attribute"); 2694 if (wps_parse_msg(decrypted, &eattr) < 0 || 2695 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) || 2696 wps_process_e_snonce1(wps, eattr.e_snonce1)) { 2697 wpabuf_free(decrypted); 2698 wps->state = SEND_WSC_NACK; 2699 return WPS_CONTINUE; 2700 } 2701 wpabuf_free(decrypted); 2702 2703 wps->state = SEND_M6; 2704 return WPS_CONTINUE; 2705} 2706 2707 2708static void wps_sta_cred_cb(struct wps_data *wps) 2709{ 2710 /* 2711 * Update credential to only include a single authentication and 2712 * encryption type in case the AP configuration includes more than one 2713 * option. 2714 */ 2715 if (wps->cred.auth_type & WPS_AUTH_WPA2PSK) 2716 wps->cred.auth_type = WPS_AUTH_WPA2PSK; 2717 else if (wps->cred.auth_type & WPS_AUTH_WPAPSK) 2718 wps->cred.auth_type = WPS_AUTH_WPAPSK; 2719 if (wps->cred.encr_type & WPS_ENCR_AES) 2720 wps->cred.encr_type = WPS_ENCR_AES; 2721 else if (wps->cred.encr_type & WPS_ENCR_TKIP) 2722 wps->cred.encr_type = WPS_ENCR_TKIP; 2723 wpa_printf(MSG_DEBUG, "WPS: Update local configuration based on the " 2724 "AP configuration"); 2725 if (wps->wps->cred_cb) 2726 wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred); 2727} 2728 2729 2730static void wps_cred_update(struct wps_credential *dst, 2731 struct wps_credential *src) 2732{ 2733 os_memcpy(dst->ssid, src->ssid, sizeof(dst->ssid)); 2734 dst->ssid_len = src->ssid_len; 2735 dst->auth_type = src->auth_type; 2736 dst->encr_type = src->encr_type; 2737 dst->key_idx = src->key_idx; 2738 os_memcpy(dst->key, src->key, sizeof(dst->key)); 2739 dst->key_len = src->key_len; 2740} 2741 2742 2743static int wps_process_ap_settings_r(struct wps_data *wps, 2744 struct wps_parse_attr *attr) 2745{ 2746 struct wpabuf *msg; 2747 2748 if (wps->wps->ap || wps->er) 2749 return 0; 2750 2751 /* AP Settings Attributes in M7 when Enrollee is an AP */ 2752 if (wps_process_ap_settings(attr, &wps->cred) < 0) 2753 return -1; 2754 2755 wpa_printf(MSG_INFO, "WPS: Received old AP configuration from AP"); 2756 2757 if (wps->new_ap_settings) { 2758 wpa_printf(MSG_INFO, "WPS: Update AP configuration based on " 2759 "new settings"); 2760 wps_cred_update(&wps->cred, wps->new_ap_settings); 2761 return 0; 2762 } else { 2763 /* 2764 * Use the AP PIN only to receive the current AP settings, not 2765 * to reconfigure the AP. 2766 */ 2767 2768 /* 2769 * Clear selected registrar here since we do not get to 2770 * WSC_Done in this protocol run. 2771 */ 2772 wps_registrar_pin_completed(wps->wps->registrar); 2773 2774 msg = wps_build_ap_cred(wps); 2775 if (msg == NULL) 2776 return -1; 2777 wps->cred.cred_attr = wpabuf_head(msg); 2778 wps->cred.cred_attr_len = wpabuf_len(msg); 2779 2780 if (wps->ap_settings_cb) { 2781 wps->ap_settings_cb(wps->ap_settings_cb_ctx, 2782 &wps->cred); 2783 wpabuf_free(msg); 2784 return 1; 2785 } 2786 wps_sta_cred_cb(wps); 2787 2788 wps->cred.cred_attr = NULL; 2789 wps->cred.cred_attr_len = 0; 2790 wpabuf_free(msg); 2791 2792 return 1; 2793 } 2794} 2795 2796 2797static enum wps_process_res wps_process_m7(struct wps_data *wps, 2798 const struct wpabuf *msg, 2799 struct wps_parse_attr *attr) 2800{ 2801 struct wpabuf *decrypted; 2802 struct wps_parse_attr eattr; 2803 2804 wpa_printf(MSG_DEBUG, "WPS: Received M7"); 2805 2806 if (wps->state != RECV_M7) { 2807 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2808 "receiving M7", wps->state); 2809 wps->state = SEND_WSC_NACK; 2810 return WPS_CONTINUE; 2811 } 2812 2813 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2814 !wps_registrar_skip_overlap(wps)) { 2815 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2816 "session overlap"); 2817 wps->state = SEND_WSC_NACK; 2818 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2819 return WPS_CONTINUE; 2820 } 2821 2822 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2823 wps_process_authenticator(wps, attr->authenticator, msg)) { 2824 wps->state = SEND_WSC_NACK; 2825 return WPS_CONTINUE; 2826 } 2827 2828 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings, 2829 attr->encr_settings_len); 2830 if (decrypted == NULL) { 2831 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypt Encrypted " 2832 "Settings attribute"); 2833 wps->state = SEND_WSC_NACK; 2834 return WPS_CONTINUE; 2835 } 2836 2837 if (wps_validate_m7_encr(decrypted, wps->wps->ap || wps->er, 2838 attr->version2 != NULL) < 0) { 2839 wpabuf_free(decrypted); 2840 wps->state = SEND_WSC_NACK; 2841 return WPS_CONTINUE; 2842 } 2843 2844 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings " 2845 "attribute"); 2846 if (wps_parse_msg(decrypted, &eattr) < 0 || 2847 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) || 2848 wps_process_e_snonce2(wps, eattr.e_snonce2) || 2849 wps_process_ap_settings_r(wps, &eattr)) { 2850 wpabuf_free(decrypted); 2851 wps->state = SEND_WSC_NACK; 2852 return WPS_CONTINUE; 2853 } 2854 2855 wpabuf_free(decrypted); 2856 2857 wps->state = SEND_M8; 2858 return WPS_CONTINUE; 2859} 2860 2861 2862static enum wps_process_res wps_process_wsc_msg(struct wps_data *wps, 2863 const struct wpabuf *msg) 2864{ 2865 struct wps_parse_attr attr; 2866 enum wps_process_res ret = WPS_CONTINUE; 2867 2868 wpa_printf(MSG_DEBUG, "WPS: Received WSC_MSG"); 2869 2870 if (wps_parse_msg(msg, &attr) < 0) 2871 return WPS_FAILURE; 2872 2873 if (attr.msg_type == NULL) { 2874 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 2875 wps->state = SEND_WSC_NACK; 2876 return WPS_CONTINUE; 2877 } 2878 2879 if (*attr.msg_type != WPS_M1 && 2880 (attr.registrar_nonce == NULL || 2881 os_memcmp(wps->nonce_r, attr.registrar_nonce, 2882 WPS_NONCE_LEN) != 0)) { 2883 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 2884 return WPS_FAILURE; 2885 } 2886 2887 switch (*attr.msg_type) { 2888 case WPS_M1: 2889 if (wps_validate_m1(msg) < 0) 2890 return WPS_FAILURE; 2891#ifdef CONFIG_WPS_UPNP 2892 if (wps->wps->wps_upnp && attr.mac_addr) { 2893 /* Remove old pending messages when starting new run */ 2894 wps_free_pending_msgs(wps->wps->upnp_msgs); 2895 wps->wps->upnp_msgs = NULL; 2896 2897 upnp_wps_device_send_wlan_event( 2898 wps->wps->wps_upnp, attr.mac_addr, 2899 UPNP_WPS_WLANEVENT_TYPE_EAP, msg); 2900 } 2901#endif /* CONFIG_WPS_UPNP */ 2902 ret = wps_process_m1(wps, &attr); 2903 break; 2904 case WPS_M3: 2905 if (wps_validate_m3(msg) < 0) 2906 return WPS_FAILURE; 2907 ret = wps_process_m3(wps, msg, &attr); 2908 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 2909 wps_fail_event(wps->wps, WPS_M3, wps->config_error, 2910 wps->error_indication, wps->mac_addr_e); 2911 break; 2912 case WPS_M5: 2913 if (wps_validate_m5(msg) < 0) 2914 return WPS_FAILURE; 2915 ret = wps_process_m5(wps, msg, &attr); 2916 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 2917 wps_fail_event(wps->wps, WPS_M5, wps->config_error, 2918 wps->error_indication, wps->mac_addr_e); 2919 break; 2920 case WPS_M7: 2921 if (wps_validate_m7(msg) < 0) 2922 return WPS_FAILURE; 2923 ret = wps_process_m7(wps, msg, &attr); 2924 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 2925 wps_fail_event(wps->wps, WPS_M7, wps->config_error, 2926 wps->error_indication, wps->mac_addr_e); 2927 break; 2928 default: 2929 wpa_printf(MSG_DEBUG, "WPS: Unsupported Message Type %d", 2930 *attr.msg_type); 2931 return WPS_FAILURE; 2932 } 2933 2934 if (ret == WPS_CONTINUE) { 2935 /* Save a copy of the last message for Authenticator derivation 2936 */ 2937 wpabuf_free(wps->last_msg); 2938 wps->last_msg = wpabuf_dup(msg); 2939 } 2940 2941 return ret; 2942} 2943 2944 2945static enum wps_process_res wps_process_wsc_ack(struct wps_data *wps, 2946 const struct wpabuf *msg) 2947{ 2948 struct wps_parse_attr attr; 2949 2950 wpa_printf(MSG_DEBUG, "WPS: Received WSC_ACK"); 2951 2952 if (wps_parse_msg(msg, &attr) < 0) 2953 return WPS_FAILURE; 2954 2955 if (attr.msg_type == NULL) { 2956 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 2957 return WPS_FAILURE; 2958 } 2959 2960 if (*attr.msg_type != WPS_WSC_ACK) { 2961 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 2962 *attr.msg_type); 2963 return WPS_FAILURE; 2964 } 2965 2966#ifdef CONFIG_WPS_UPNP 2967 if (wps->wps->wps_upnp && wps->ext_reg && wps->state == RECV_M2D_ACK && 2968 upnp_wps_subscribers(wps->wps->wps_upnp)) { 2969 if (wps->wps->upnp_msgs) 2970 return WPS_CONTINUE; 2971 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an " 2972 "external Registrar"); 2973 return WPS_PENDING; 2974 } 2975#endif /* CONFIG_WPS_UPNP */ 2976 2977 if (attr.registrar_nonce == NULL || 2978 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 2979 { 2980 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 2981 return WPS_FAILURE; 2982 } 2983 2984 if (attr.enrollee_nonce == NULL || 2985 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 2986 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 2987 return WPS_FAILURE; 2988 } 2989 2990 if (wps->state == RECV_M2D_ACK) { 2991#ifdef CONFIG_WPS_UPNP 2992 if (wps->wps->wps_upnp && 2993 upnp_wps_subscribers(wps->wps->wps_upnp)) { 2994 if (wps->wps->upnp_msgs) 2995 return WPS_CONTINUE; 2996 if (wps->ext_reg == 0) 2997 wps->ext_reg = 1; 2998 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an " 2999 "external Registrar"); 3000 return WPS_PENDING; 3001 } 3002#endif /* CONFIG_WPS_UPNP */ 3003 3004 wpa_printf(MSG_DEBUG, "WPS: No more registrars available - " 3005 "terminate negotiation"); 3006 } 3007 3008 return WPS_FAILURE; 3009} 3010 3011 3012static enum wps_process_res wps_process_wsc_nack(struct wps_data *wps, 3013 const struct wpabuf *msg) 3014{ 3015 struct wps_parse_attr attr; 3016 int old_state; 3017 u16 config_error; 3018 3019 wpa_printf(MSG_DEBUG, "WPS: Received WSC_NACK"); 3020 3021 old_state = wps->state; 3022 wps->state = SEND_WSC_NACK; 3023 3024 if (wps_parse_msg(msg, &attr) < 0) 3025 return WPS_FAILURE; 3026 3027 if (attr.msg_type == NULL) { 3028 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3029 return WPS_FAILURE; 3030 } 3031 3032 if (*attr.msg_type != WPS_WSC_NACK) { 3033 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 3034 *attr.msg_type); 3035 return WPS_FAILURE; 3036 } 3037 3038#ifdef CONFIG_WPS_UPNP 3039 if (wps->wps->wps_upnp && wps->ext_reg) { 3040 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external " 3041 "Registrar terminated by the Enrollee"); 3042 return WPS_FAILURE; 3043 } 3044#endif /* CONFIG_WPS_UPNP */ 3045 3046 if (attr.registrar_nonce == NULL || 3047 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 3048 { 3049 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3050 return WPS_FAILURE; 3051 } 3052 3053 if (attr.enrollee_nonce == NULL || 3054 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 3055 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 3056 return WPS_FAILURE; 3057 } 3058 3059 if (attr.config_error == NULL) { 3060 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error attribute " 3061 "in WSC_NACK"); 3062 return WPS_FAILURE; 3063 } 3064 3065 config_error = WPA_GET_BE16(attr.config_error); 3066 wpa_printf(MSG_DEBUG, "WPS: Enrollee terminated negotiation with " 3067 "Configuration Error %d", config_error); 3068 3069 switch (old_state) { 3070 case RECV_M3: 3071 wps_fail_event(wps->wps, WPS_M2, config_error, 3072 wps->error_indication, wps->mac_addr_e); 3073 break; 3074 case RECV_M5: 3075 wps_fail_event(wps->wps, WPS_M4, config_error, 3076 wps->error_indication, wps->mac_addr_e); 3077 break; 3078 case RECV_M7: 3079 wps_fail_event(wps->wps, WPS_M6, config_error, 3080 wps->error_indication, wps->mac_addr_e); 3081 break; 3082 case RECV_DONE: 3083 wps_fail_event(wps->wps, WPS_M8, config_error, 3084 wps->error_indication, wps->mac_addr_e); 3085 break; 3086 default: 3087 break; 3088 } 3089 3090 return WPS_FAILURE; 3091} 3092 3093 3094static enum wps_process_res wps_process_wsc_done(struct wps_data *wps, 3095 const struct wpabuf *msg) 3096{ 3097 struct wps_parse_attr attr; 3098 3099 wpa_printf(MSG_DEBUG, "WPS: Received WSC_Done"); 3100 3101 if (wps->state != RECV_DONE && 3102 (!wps->wps->wps_upnp || !wps->ext_reg)) { 3103 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 3104 "receiving WSC_Done", wps->state); 3105 return WPS_FAILURE; 3106 } 3107 3108 if (wps_parse_msg(msg, &attr) < 0) 3109 return WPS_FAILURE; 3110 3111 if (attr.msg_type == NULL) { 3112 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3113 return WPS_FAILURE; 3114 } 3115 3116 if (*attr.msg_type != WPS_WSC_DONE) { 3117 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 3118 *attr.msg_type); 3119 return WPS_FAILURE; 3120 } 3121 3122#ifdef CONFIG_WPS_UPNP 3123 if (wps->wps->wps_upnp && wps->ext_reg) { 3124 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external " 3125 "Registrar completed successfully"); 3126 wps_device_store(wps->wps->registrar, &wps->peer_dev, 3127 wps->uuid_e); 3128 return WPS_DONE; 3129 } 3130#endif /* CONFIG_WPS_UPNP */ 3131 3132 if (attr.registrar_nonce == NULL || 3133 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 3134 { 3135 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3136 return WPS_FAILURE; 3137 } 3138 3139 if (attr.enrollee_nonce == NULL || 3140 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 3141 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 3142 return WPS_FAILURE; 3143 } 3144 3145 wpa_printf(MSG_DEBUG, "WPS: Negotiation completed successfully"); 3146 wps_device_store(wps->wps->registrar, &wps->peer_dev, 3147 wps->uuid_e); 3148 3149 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->new_psk && 3150 wps->wps->ap && !wps->wps->registrar->disable_auto_conf) { 3151 struct wps_credential cred; 3152 3153 wpa_printf(MSG_DEBUG, "WPS: Moving to Configured state based " 3154 "on first Enrollee connection"); 3155 3156 os_memset(&cred, 0, sizeof(cred)); 3157 os_memcpy(cred.ssid, wps->wps->ssid, wps->wps->ssid_len); 3158 cred.ssid_len = wps->wps->ssid_len; 3159 cred.auth_type = WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK; 3160 cred.encr_type = WPS_ENCR_TKIP | WPS_ENCR_AES; 3161 os_memcpy(cred.key, wps->new_psk, wps->new_psk_len); 3162 cred.key_len = wps->new_psk_len; 3163 3164 wps->wps->wps_state = WPS_STATE_CONFIGURED; 3165 wpa_hexdump_ascii_key(MSG_DEBUG, 3166 "WPS: Generated random passphrase", 3167 wps->new_psk, wps->new_psk_len); 3168 if (wps->wps->cred_cb) 3169 wps->wps->cred_cb(wps->wps->cb_ctx, &cred); 3170 3171 os_free(wps->new_psk); 3172 wps->new_psk = NULL; 3173 } 3174 3175 if (!wps->wps->ap && !wps->er) 3176 wps_sta_cred_cb(wps); 3177 3178 if (wps->new_psk) { 3179 if (wps_cb_new_psk(wps->wps->registrar, wps->mac_addr_e, 3180 wps->p2p_dev_addr, wps->new_psk, 3181 wps->new_psk_len)) { 3182 wpa_printf(MSG_DEBUG, "WPS: Failed to configure the " 3183 "new PSK"); 3184 } 3185 os_free(wps->new_psk); 3186 wps->new_psk = NULL; 3187 } 3188 3189 wps_cb_reg_success(wps->wps->registrar, wps->mac_addr_e, wps->uuid_e, 3190 wps->dev_password, wps->dev_password_len); 3191 3192 if (wps->pbc) { 3193 wps_registrar_remove_pbc_session(wps->wps->registrar, 3194 wps->uuid_e, 3195 wps->p2p_dev_addr); 3196 wps_registrar_pbc_completed(wps->wps->registrar); 3197#ifdef WPS_WORKAROUNDS 3198 os_get_reltime(&wps->wps->registrar->pbc_ignore_start); 3199#endif /* WPS_WORKAROUNDS */ 3200 os_memcpy(wps->wps->registrar->pbc_ignore_uuid, wps->uuid_e, 3201 WPS_UUID_LEN); 3202 } else { 3203 wps_registrar_pin_completed(wps->wps->registrar); 3204 } 3205 /* TODO: maintain AuthorizedMACs somewhere separately for each ER and 3206 * merge them into APs own list.. */ 3207 3208 wps_success_event(wps->wps, wps->mac_addr_e); 3209 3210 return WPS_DONE; 3211} 3212 3213 3214enum wps_process_res wps_registrar_process_msg(struct wps_data *wps, 3215 enum wsc_op_code op_code, 3216 const struct wpabuf *msg) 3217{ 3218 enum wps_process_res ret; 3219 3220 wpa_printf(MSG_DEBUG, "WPS: Processing received message (len=%lu " 3221 "op_code=%d)", 3222 (unsigned long) wpabuf_len(msg), op_code); 3223 3224#ifdef CONFIG_WPS_UPNP 3225 if (wps->wps->wps_upnp && op_code == WSC_MSG && wps->ext_reg == 1) { 3226 struct wps_parse_attr attr; 3227 if (wps_parse_msg(msg, &attr) == 0 && attr.msg_type && 3228 *attr.msg_type == WPS_M3) 3229 wps->ext_reg = 2; /* past M2/M2D phase */ 3230 } 3231 if (wps->ext_reg > 1) 3232 wps_registrar_free_pending_m2(wps->wps); 3233 if (wps->wps->wps_upnp && wps->ext_reg && 3234 wps->wps->upnp_msgs == NULL && 3235 (op_code == WSC_MSG || op_code == WSC_Done || op_code == WSC_NACK)) 3236 { 3237 struct wps_parse_attr attr; 3238 int type; 3239 if (wps_parse_msg(msg, &attr) < 0 || attr.msg_type == NULL) 3240 type = -1; 3241 else 3242 type = *attr.msg_type; 3243 wpa_printf(MSG_DEBUG, "WPS: Sending received message (type %d)" 3244 " to external Registrar for processing", type); 3245 upnp_wps_device_send_wlan_event(wps->wps->wps_upnp, 3246 wps->mac_addr_e, 3247 UPNP_WPS_WLANEVENT_TYPE_EAP, 3248 msg); 3249 if (op_code == WSC_MSG) 3250 return WPS_PENDING; 3251 } else if (wps->wps->wps_upnp && wps->ext_reg && op_code == WSC_MSG) { 3252 wpa_printf(MSG_DEBUG, "WPS: Skip internal processing - using " 3253 "external Registrar"); 3254 return WPS_CONTINUE; 3255 } 3256#endif /* CONFIG_WPS_UPNP */ 3257 3258 switch (op_code) { 3259 case WSC_MSG: 3260 return wps_process_wsc_msg(wps, msg); 3261 case WSC_ACK: 3262 if (wps_validate_wsc_ack(msg) < 0) 3263 return WPS_FAILURE; 3264 return wps_process_wsc_ack(wps, msg); 3265 case WSC_NACK: 3266 if (wps_validate_wsc_nack(msg) < 0) 3267 return WPS_FAILURE; 3268 return wps_process_wsc_nack(wps, msg); 3269 case WSC_Done: 3270 if (wps_validate_wsc_done(msg) < 0) 3271 return WPS_FAILURE; 3272 ret = wps_process_wsc_done(wps, msg); 3273 if (ret == WPS_FAILURE) { 3274 wps->state = SEND_WSC_NACK; 3275 wps_fail_event(wps->wps, WPS_WSC_DONE, 3276 wps->config_error, 3277 wps->error_indication, wps->mac_addr_e); 3278 } 3279 return ret; 3280 default: 3281 wpa_printf(MSG_DEBUG, "WPS: Unsupported op_code %d", op_code); 3282 return WPS_FAILURE; 3283 } 3284} 3285 3286 3287int wps_registrar_update_ie(struct wps_registrar *reg) 3288{ 3289 return wps_set_ie(reg); 3290} 3291 3292 3293static void wps_registrar_set_selected_timeout(void *eloop_ctx, 3294 void *timeout_ctx) 3295{ 3296 struct wps_registrar *reg = eloop_ctx; 3297 3298 wpa_printf(MSG_DEBUG, "WPS: Selected Registrar timeout - " 3299 "unselect internal Registrar"); 3300 reg->selected_registrar = 0; 3301 reg->pbc = 0; 3302 wps_registrar_selected_registrar_changed(reg, 0); 3303} 3304 3305 3306#ifdef CONFIG_WPS_UPNP 3307static void wps_registrar_sel_reg_add(struct wps_registrar *reg, 3308 struct subscription *s) 3309{ 3310 int i, j; 3311 wpa_printf(MSG_DEBUG, "WPS: External Registrar selected (dev_pw_id=%d " 3312 "config_methods=0x%x)", 3313 s->dev_password_id, s->config_methods); 3314 reg->sel_reg_union = 1; 3315 if (reg->sel_reg_dev_password_id_override != DEV_PW_PUSHBUTTON) 3316 reg->sel_reg_dev_password_id_override = s->dev_password_id; 3317 if (reg->sel_reg_config_methods_override == -1) 3318 reg->sel_reg_config_methods_override = 0; 3319 reg->sel_reg_config_methods_override |= s->config_methods; 3320 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) 3321 if (is_zero_ether_addr(reg->authorized_macs_union[i])) 3322 break; 3323 for (j = 0; i < WPS_MAX_AUTHORIZED_MACS && j < WPS_MAX_AUTHORIZED_MACS; 3324 j++) { 3325 if (is_zero_ether_addr(s->authorized_macs[j])) 3326 break; 3327 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC into union: " 3328 MACSTR, MAC2STR(s->authorized_macs[j])); 3329 os_memcpy(reg->authorized_macs_union[i], 3330 s->authorized_macs[j], ETH_ALEN); 3331 i++; 3332 } 3333 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union", 3334 (u8 *) reg->authorized_macs_union, 3335 sizeof(reg->authorized_macs_union)); 3336} 3337#endif /* CONFIG_WPS_UPNP */ 3338 3339 3340static void wps_registrar_sel_reg_union(struct wps_registrar *reg) 3341{ 3342#ifdef CONFIG_WPS_UPNP 3343 struct subscription *s; 3344 3345 if (reg->wps->wps_upnp == NULL) 3346 return; 3347 3348 dl_list_for_each(s, ®->wps->wps_upnp->subscriptions, 3349 struct subscription, list) { 3350 struct subscr_addr *sa; 3351 sa = dl_list_first(&s->addr_list, struct subscr_addr, list); 3352 if (sa) { 3353 wpa_printf(MSG_DEBUG, "WPS: External Registrar %s:%d", 3354 inet_ntoa(sa->saddr.sin_addr), 3355 ntohs(sa->saddr.sin_port)); 3356 } 3357 if (s->selected_registrar) 3358 wps_registrar_sel_reg_add(reg, s); 3359 else 3360 wpa_printf(MSG_DEBUG, "WPS: External Registrar not " 3361 "selected"); 3362 } 3363#endif /* CONFIG_WPS_UPNP */ 3364} 3365 3366 3367/** 3368 * wps_registrar_selected_registrar_changed - SetSelectedRegistrar change 3369 * @reg: Registrar data from wps_registrar_init() 3370 * 3371 * This function is called when selected registrar state changes, e.g., when an 3372 * AP receives a SetSelectedRegistrar UPnP message. 3373 */ 3374void wps_registrar_selected_registrar_changed(struct wps_registrar *reg, 3375 u16 dev_pw_id) 3376{ 3377 wpa_printf(MSG_DEBUG, "WPS: Selected registrar information changed"); 3378 3379 reg->sel_reg_union = reg->selected_registrar; 3380 reg->sel_reg_dev_password_id_override = -1; 3381 reg->sel_reg_config_methods_override = -1; 3382 os_memcpy(reg->authorized_macs_union, reg->authorized_macs, 3383 WPS_MAX_AUTHORIZED_MACS * ETH_ALEN); 3384 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union (start with own)", 3385 (u8 *) reg->authorized_macs_union, 3386 sizeof(reg->authorized_macs_union)); 3387 if (reg->selected_registrar) { 3388 u16 methods; 3389 3390 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 3391#ifdef CONFIG_WPS2 3392 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 3393 WPS_CONFIG_PHY_PUSHBUTTON); 3394#endif /* CONFIG_WPS2 */ 3395 if (reg->pbc) { 3396 reg->sel_reg_dev_password_id_override = 3397 DEV_PW_PUSHBUTTON; 3398 wps_set_pushbutton(&methods, reg->wps->config_methods); 3399 } else if (dev_pw_id) 3400 reg->sel_reg_dev_password_id_override = dev_pw_id; 3401 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar selected " 3402 "(pbc=%d)", reg->pbc); 3403 reg->sel_reg_config_methods_override = methods; 3404 } else 3405 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar not selected"); 3406 3407 wps_registrar_sel_reg_union(reg); 3408 3409 wps_set_ie(reg); 3410 wps_cb_set_sel_reg(reg); 3411} 3412 3413 3414int wps_registrar_get_info(struct wps_registrar *reg, const u8 *addr, 3415 char *buf, size_t buflen) 3416{ 3417 struct wps_registrar_device *d; 3418 int len = 0, ret; 3419 char uuid[40]; 3420 char devtype[WPS_DEV_TYPE_BUFSIZE]; 3421 3422 d = wps_device_get(reg, addr); 3423 if (d == NULL) 3424 return 0; 3425 if (uuid_bin2str(d->uuid, uuid, sizeof(uuid))) 3426 return 0; 3427 3428 ret = os_snprintf(buf + len, buflen - len, 3429 "wpsUuid=%s\n" 3430 "wpsPrimaryDeviceType=%s\n" 3431 "wpsDeviceName=%s\n" 3432 "wpsManufacturer=%s\n" 3433 "wpsModelName=%s\n" 3434 "wpsModelNumber=%s\n" 3435 "wpsSerialNumber=%s\n", 3436 uuid, 3437 wps_dev_type_bin2str(d->dev.pri_dev_type, devtype, 3438 sizeof(devtype)), 3439 d->dev.device_name ? d->dev.device_name : "", 3440 d->dev.manufacturer ? d->dev.manufacturer : "", 3441 d->dev.model_name ? d->dev.model_name : "", 3442 d->dev.model_number ? d->dev.model_number : "", 3443 d->dev.serial_number ? d->dev.serial_number : ""); 3444 if (ret < 0 || (size_t) ret >= buflen - len) 3445 return len; 3446 len += ret; 3447 3448 return len; 3449} 3450 3451 3452int wps_registrar_config_ap(struct wps_registrar *reg, 3453 struct wps_credential *cred) 3454{ 3455#ifdef CONFIG_WPS2 3456 wpa_printf(MSG_DEBUG, "WPS: encr_type=0x%x", cred->encr_type); 3457 if (!(cred->encr_type & (WPS_ENCR_NONE | WPS_ENCR_TKIP | 3458 WPS_ENCR_AES))) { 3459 if (cred->encr_type & WPS_ENCR_WEP) { 3460 wpa_printf(MSG_INFO, "WPS: Reject new AP settings " 3461 "due to WEP configuration"); 3462 return -1; 3463 } 3464 3465 wpa_printf(MSG_INFO, "WPS: Reject new AP settings due to " 3466 "invalid encr_type 0x%x", cred->encr_type); 3467 return -1; 3468 } 3469 3470 if ((cred->encr_type & (WPS_ENCR_TKIP | WPS_ENCR_AES)) == 3471 WPS_ENCR_TKIP) { 3472 wpa_printf(MSG_DEBUG, "WPS: Upgrade encr_type TKIP -> " 3473 "TKIP+AES"); 3474 cred->encr_type |= WPS_ENCR_AES; 3475 } 3476 3477 if ((cred->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) == 3478 WPS_AUTH_WPAPSK) { 3479 wpa_printf(MSG_DEBUG, "WPS: Upgrade auth_type WPAPSK -> " 3480 "WPAPSK+WPA2PSK"); 3481 cred->auth_type |= WPS_AUTH_WPA2PSK; 3482 } 3483#endif /* CONFIG_WPS2 */ 3484 3485 if (reg->wps->cred_cb) 3486 return reg->wps->cred_cb(reg->wps->cb_ctx, cred); 3487 3488 return -1; 3489} 3490 3491 3492#ifdef CONFIG_WPS_NFC 3493 3494int wps_registrar_add_nfc_pw_token(struct wps_registrar *reg, 3495 const u8 *pubkey_hash, u16 pw_id, 3496 const u8 *dev_pw, size_t dev_pw_len) 3497{ 3498 struct wps_nfc_pw_token *token; 3499 3500 if (dev_pw_len > WPS_OOB_DEVICE_PASSWORD_LEN) 3501 return -1; 3502 3503 wps_free_nfc_pw_tokens(®->nfc_pw_tokens, pw_id); 3504 3505 token = os_zalloc(sizeof(*token)); 3506 if (token == NULL) 3507 return -1; 3508 3509 os_memcpy(token->pubkey_hash, pubkey_hash, WPS_OOB_PUBKEY_HASH_LEN); 3510 token->pw_id = pw_id; 3511 wpa_snprintf_hex_uppercase((char *) token->dev_pw, 3512 sizeof(token->dev_pw), 3513 dev_pw, dev_pw_len); 3514 token->dev_pw_len = dev_pw_len * 2; 3515 3516 dl_list_add(®->nfc_pw_tokens, &token->list); 3517 3518 reg->selected_registrar = 1; 3519 reg->pbc = 0; 3520 wps_registrar_add_authorized_mac(reg, 3521 (u8 *) "\xff\xff\xff\xff\xff\xff"); 3522 wps_registrar_selected_registrar_changed(reg, pw_id); 3523 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 3524 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, 3525 wps_registrar_set_selected_timeout, 3526 reg, NULL); 3527 3528 wpa_printf(MSG_DEBUG, "WPS: Added NFC Device Password %u to Registrar", 3529 pw_id); 3530 3531 return 0; 3532} 3533 3534 3535int wps_registrar_add_nfc_password_token(struct wps_registrar *reg, 3536 const u8 *oob_dev_pw, 3537 size_t oob_dev_pw_len) 3538{ 3539 const u8 *pos, *hash, *dev_pw; 3540 u16 id; 3541 size_t dev_pw_len; 3542 3543 if (oob_dev_pw_len < WPS_OOB_PUBKEY_HASH_LEN + 2 + 3544 WPS_OOB_DEVICE_PASSWORD_MIN_LEN || 3545 oob_dev_pw_len > WPS_OOB_PUBKEY_HASH_LEN + 2 + 3546 WPS_OOB_DEVICE_PASSWORD_LEN) 3547 return -1; 3548 3549 hash = oob_dev_pw; 3550 pos = oob_dev_pw + WPS_OOB_PUBKEY_HASH_LEN; 3551 id = WPA_GET_BE16(pos); 3552 dev_pw = pos + 2; 3553 dev_pw_len = oob_dev_pw + oob_dev_pw_len - dev_pw; 3554 3555 wpa_printf(MSG_DEBUG, "WPS: Add NFC Password Token for Password ID %u", 3556 id); 3557 3558 wpa_hexdump(MSG_DEBUG, "WPS: Public Key Hash", 3559 hash, WPS_OOB_PUBKEY_HASH_LEN); 3560 wpa_hexdump_key(MSG_DEBUG, "WPS: Device Password", dev_pw, dev_pw_len); 3561 3562 return wps_registrar_add_nfc_pw_token(reg, hash, id, dev_pw, 3563 dev_pw_len); 3564} 3565 3566 3567void wps_registrar_remove_nfc_pw_token(struct wps_registrar *reg, 3568 struct wps_nfc_pw_token *token) 3569{ 3570 wps_registrar_remove_authorized_mac(reg, 3571 (u8 *) "\xff\xff\xff\xff\xff\xff"); 3572 wps_registrar_selected_registrar_changed(reg, 0); 3573} 3574 3575#endif /* CONFIG_WPS_NFC */ 3576