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