wps_registrar.c revision 61d9df3e62aaa0e87ad05452fcb95142159a17b6
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}; 184 185 186static int wps_set_ie(struct wps_registrar *reg); 187static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx); 188static void wps_registrar_set_selected_timeout(void *eloop_ctx, 189 void *timeout_ctx); 190 191 192static void wps_registrar_add_authorized_mac(struct wps_registrar *reg, 193 const u8 *addr) 194{ 195 int i; 196 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC " MACSTR, 197 MAC2STR(addr)); 198 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) 199 if (os_memcmp(reg->authorized_macs[i], addr, ETH_ALEN) == 0) { 200 wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was " 201 "already in the list"); 202 return; /* already in list */ 203 } 204 for (i = WPS_MAX_AUTHORIZED_MACS - 1; i > 0; i--) 205 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i - 1], 206 ETH_ALEN); 207 os_memcpy(reg->authorized_macs[0], addr, ETH_ALEN); 208 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs", 209 (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs)); 210} 211 212 213static void wps_registrar_remove_authorized_mac(struct wps_registrar *reg, 214 const u8 *addr) 215{ 216 int i; 217 wpa_printf(MSG_DEBUG, "WPS: Remove authorized MAC " MACSTR, 218 MAC2STR(addr)); 219 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) { 220 if (os_memcmp(reg->authorized_macs, addr, ETH_ALEN) == 0) 221 break; 222 } 223 if (i == WPS_MAX_AUTHORIZED_MACS) { 224 wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was not in the " 225 "list"); 226 return; /* not in the list */ 227 } 228 for (; i + 1 < WPS_MAX_AUTHORIZED_MACS; i++) 229 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i + 1], 230 ETH_ALEN); 231 os_memset(reg->authorized_macs[WPS_MAX_AUTHORIZED_MACS - 1], 0, 232 ETH_ALEN); 233 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs", 234 (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs)); 235} 236 237 238static void wps_free_devices(struct wps_registrar_device *dev) 239{ 240 struct wps_registrar_device *prev; 241 242 while (dev) { 243 prev = dev; 244 dev = dev->next; 245 wps_device_data_free(&prev->dev); 246 os_free(prev); 247 } 248} 249 250 251static struct wps_registrar_device * wps_device_get(struct wps_registrar *reg, 252 const u8 *addr) 253{ 254 struct wps_registrar_device *dev; 255 256 for (dev = reg->devices; dev; dev = dev->next) { 257 if (os_memcmp(dev->dev.mac_addr, addr, ETH_ALEN) == 0) 258 return dev; 259 } 260 return NULL; 261} 262 263 264static void wps_device_clone_data(struct wps_device_data *dst, 265 struct wps_device_data *src) 266{ 267 os_memcpy(dst->mac_addr, src->mac_addr, ETH_ALEN); 268 os_memcpy(dst->pri_dev_type, src->pri_dev_type, WPS_DEV_TYPE_LEN); 269 270#define WPS_STRDUP(n) \ 271 os_free(dst->n); \ 272 dst->n = src->n ? os_strdup(src->n) : NULL 273 274 WPS_STRDUP(device_name); 275 WPS_STRDUP(manufacturer); 276 WPS_STRDUP(model_name); 277 WPS_STRDUP(model_number); 278 WPS_STRDUP(serial_number); 279#undef WPS_STRDUP 280} 281 282 283int wps_device_store(struct wps_registrar *reg, 284 struct wps_device_data *dev, const u8 *uuid) 285{ 286 struct wps_registrar_device *d; 287 288 d = wps_device_get(reg, dev->mac_addr); 289 if (d == NULL) { 290 d = os_zalloc(sizeof(*d)); 291 if (d == NULL) 292 return -1; 293 d->next = reg->devices; 294 reg->devices = d; 295 } 296 297 wps_device_clone_data(&d->dev, dev); 298 os_memcpy(d->uuid, uuid, WPS_UUID_LEN); 299 300 return 0; 301} 302 303 304static void wps_registrar_add_pbc_session(struct wps_registrar *reg, 305 const u8 *addr, const u8 *uuid_e) 306{ 307 struct wps_pbc_session *pbc, *prev = NULL; 308 struct os_time now; 309 310 os_get_time(&now); 311 312 pbc = reg->pbc_sessions; 313 while (pbc) { 314 if (os_memcmp(pbc->addr, addr, ETH_ALEN) == 0 && 315 os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0) { 316 if (prev) 317 prev->next = pbc->next; 318 else 319 reg->pbc_sessions = pbc->next; 320 break; 321 } 322 prev = pbc; 323 pbc = pbc->next; 324 } 325 326 if (!pbc) { 327 pbc = os_zalloc(sizeof(*pbc)); 328 if (pbc == NULL) 329 return; 330 os_memcpy(pbc->addr, addr, ETH_ALEN); 331 if (uuid_e) 332 os_memcpy(pbc->uuid_e, uuid_e, WPS_UUID_LEN); 333 } 334 335 pbc->next = reg->pbc_sessions; 336 reg->pbc_sessions = pbc; 337 pbc->timestamp = now; 338 339 /* remove entries that have timed out */ 340 prev = pbc; 341 pbc = pbc->next; 342 343 while (pbc) { 344 if (now.sec > pbc->timestamp.sec + WPS_PBC_WALK_TIME) { 345 prev->next = NULL; 346 wps_free_pbc_sessions(pbc); 347 break; 348 } 349 prev = pbc; 350 pbc = pbc->next; 351 } 352} 353 354 355static void wps_registrar_remove_pbc_session(struct wps_registrar *reg, 356 const u8 *uuid_e, 357 const u8 *p2p_dev_addr) 358{ 359 struct wps_pbc_session *pbc, *prev = NULL, *tmp; 360 361 pbc = reg->pbc_sessions; 362 while (pbc) { 363 if (os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0 || 364#ifdef ANDROID_P2P 365 (p2p_dev_addr && !is_zero_ether_addr(pbc->addr) && 366 os_memcmp(pbc->addr, p2p_dev_addr, ETH_ALEN) == 367#else 368 (p2p_dev_addr && !is_zero_ether_addr(reg->p2p_dev_addr) && 369 os_memcmp(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN) == 370#endif 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} 697 698 699/** 700 * wps_registrar_add_pin - Configure a new PIN for Registrar 701 * @reg: Registrar data from wps_registrar_init() 702 * @addr: Enrollee MAC address or %NULL if not known 703 * @uuid: UUID-E or %NULL for wildcard (any UUID) 704 * @pin: PIN (Device Password) 705 * @pin_len: Length of pin in octets 706 * @timeout: Time (in seconds) when the PIN will be invalidated; 0 = no timeout 707 * Returns: 0 on success, -1 on failure 708 */ 709int wps_registrar_add_pin(struct wps_registrar *reg, const u8 *addr, 710 const u8 *uuid, const u8 *pin, size_t pin_len, 711 int timeout) 712{ 713 struct wps_uuid_pin *p; 714 715 p = os_zalloc(sizeof(*p)); 716 if (p == NULL) 717 return -1; 718 if (addr) 719 os_memcpy(p->enrollee_addr, addr, ETH_ALEN); 720 if (uuid == NULL) 721 p->wildcard_uuid = 1; 722 else 723 os_memcpy(p->uuid, uuid, WPS_UUID_LEN); 724 p->pin = os_malloc(pin_len); 725 if (p->pin == NULL) { 726 os_free(p); 727 return -1; 728 } 729 os_memcpy(p->pin, pin, pin_len); 730 p->pin_len = pin_len; 731 732 if (timeout) { 733 p->flags |= PIN_EXPIRES; 734 os_get_time(&p->expiration); 735 p->expiration.sec += timeout; 736 } 737 738 dl_list_add(®->pins, &p->list); 739 740 wpa_printf(MSG_DEBUG, "WPS: A new PIN configured (timeout=%d)", 741 timeout); 742 wpa_hexdump(MSG_DEBUG, "WPS: UUID", uuid, WPS_UUID_LEN); 743 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: PIN", pin, pin_len); 744 reg->selected_registrar = 1; 745 reg->pbc = 0; 746 if (addr) 747 wps_registrar_add_authorized_mac(reg, addr); 748 else 749 wps_registrar_add_authorized_mac( 750 reg, (u8 *) "\xff\xff\xff\xff\xff\xff"); 751 wps_registrar_selected_registrar_changed(reg); 752 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 753 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, 754 wps_registrar_set_selected_timeout, 755 reg, NULL); 756 757 return 0; 758} 759 760 761static void wps_registrar_remove_pin(struct wps_registrar *reg, 762 struct wps_uuid_pin *pin) 763{ 764 u8 *addr; 765 u8 bcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 766 767 if (is_zero_ether_addr(pin->enrollee_addr)) 768 addr = bcast; 769 else 770 addr = pin->enrollee_addr; 771 wps_registrar_remove_authorized_mac(reg, addr); 772 wps_remove_pin(pin); 773 wps_registrar_selected_registrar_changed(reg); 774} 775 776 777static void wps_registrar_expire_pins(struct wps_registrar *reg) 778{ 779 struct wps_uuid_pin *pin, *prev; 780 struct os_time now; 781 782 os_get_time(&now); 783 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 784 { 785 if ((pin->flags & PIN_EXPIRES) && 786 os_time_before(&pin->expiration, &now)) { 787 wpa_hexdump(MSG_DEBUG, "WPS: Expired PIN for UUID", 788 pin->uuid, WPS_UUID_LEN); 789 wps_registrar_remove_pin(reg, pin); 790 } 791 } 792} 793 794 795/** 796 * wps_registrar_invalidate_wildcard_pin - Invalidate a wildcard PIN 797 * @reg: Registrar data from wps_registrar_init() 798 * @dev_pw: PIN to search for or %NULL to match any 799 * @dev_pw_len: Length of dev_pw in octets 800 * Returns: 0 on success, -1 if not wildcard PIN is enabled 801 */ 802static int wps_registrar_invalidate_wildcard_pin(struct wps_registrar *reg, 803 const u8 *dev_pw, 804 size_t dev_pw_len) 805{ 806 struct wps_uuid_pin *pin, *prev; 807 808 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 809 { 810 if (dev_pw && pin->pin && 811 (dev_pw_len != pin->pin_len || 812 os_memcmp(dev_pw, pin->pin, dev_pw_len) != 0)) 813 continue; /* different PIN */ 814 if (pin->wildcard_uuid) { 815 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID", 816 pin->uuid, WPS_UUID_LEN); 817 wps_registrar_remove_pin(reg, pin); 818 return 0; 819 } 820 } 821 822 return -1; 823} 824 825 826/** 827 * wps_registrar_invalidate_pin - Invalidate a PIN for a specific UUID-E 828 * @reg: Registrar data from wps_registrar_init() 829 * @uuid: UUID-E 830 * Returns: 0 on success, -1 on failure (e.g., PIN not found) 831 */ 832int wps_registrar_invalidate_pin(struct wps_registrar *reg, const u8 *uuid) 833{ 834 struct wps_uuid_pin *pin, *prev; 835 836 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 837 { 838 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 839 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID", 840 pin->uuid, WPS_UUID_LEN); 841 wps_registrar_remove_pin(reg, pin); 842 return 0; 843 } 844 } 845 846 return -1; 847} 848 849 850static const u8 * wps_registrar_get_pin(struct wps_registrar *reg, 851 const u8 *uuid, size_t *pin_len) 852{ 853 struct wps_uuid_pin *pin, *found = NULL; 854 855 wps_registrar_expire_pins(reg); 856 857 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 858 if (!pin->wildcard_uuid && 859 os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 860 found = pin; 861 break; 862 } 863 } 864 865 if (!found) { 866 /* Check for wildcard UUIDs since none of the UUID-specific 867 * PINs matched */ 868 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 869 if (pin->wildcard_uuid == 1 || 870 pin->wildcard_uuid == 2) { 871 wpa_printf(MSG_DEBUG, "WPS: Found a wildcard " 872 "PIN. Assigned it for this UUID-E"); 873 pin->wildcard_uuid++; 874 os_memcpy(pin->uuid, uuid, WPS_UUID_LEN); 875 found = pin; 876 break; 877 } 878 } 879 } 880 881 if (!found) 882 return NULL; 883 884 /* 885 * Lock the PIN to avoid attacks based on concurrent re-use of the PIN 886 * that could otherwise avoid PIN invalidations. 887 */ 888 if (found->flags & PIN_LOCKED) { 889 wpa_printf(MSG_DEBUG, "WPS: Selected PIN locked - do not " 890 "allow concurrent re-use"); 891 return NULL; 892 } 893 *pin_len = found->pin_len; 894 found->flags |= PIN_LOCKED; 895 return found->pin; 896} 897 898 899/** 900 * wps_registrar_unlock_pin - Unlock a PIN for a specific UUID-E 901 * @reg: Registrar data from wps_registrar_init() 902 * @uuid: UUID-E 903 * Returns: 0 on success, -1 on failure 904 * 905 * PINs are locked to enforce only one concurrent use. This function unlocks a 906 * PIN to allow it to be used again. If the specified PIN was configured using 907 * a wildcard UUID, it will be removed instead of allowing multiple uses. 908 */ 909int wps_registrar_unlock_pin(struct wps_registrar *reg, const u8 *uuid) 910{ 911 struct wps_uuid_pin *pin; 912 913 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 914 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 915 if (pin->wildcard_uuid == 3) { 916 wpa_printf(MSG_DEBUG, "WPS: Invalidating used " 917 "wildcard PIN"); 918 return wps_registrar_invalidate_pin(reg, uuid); 919 } 920 pin->flags &= ~PIN_LOCKED; 921 return 0; 922 } 923 } 924 925 return -1; 926} 927 928 929static void wps_registrar_stop_pbc(struct wps_registrar *reg) 930{ 931 reg->selected_registrar = 0; 932 reg->pbc = 0; 933 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN); 934 wps_registrar_remove_authorized_mac(reg, 935 (u8 *) "\xff\xff\xff\xff\xff\xff"); 936 wps_registrar_selected_registrar_changed(reg); 937} 938 939 940static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx) 941{ 942 struct wps_registrar *reg = eloop_ctx; 943 944 wpa_printf(MSG_DEBUG, "WPS: PBC timed out - disable PBC mode"); 945 wps_pbc_timeout_event(reg->wps); 946 wps_registrar_stop_pbc(reg); 947} 948 949 950/** 951 * wps_registrar_button_pushed - Notify Registrar that AP button was pushed 952 * @reg: Registrar data from wps_registrar_init() 953 * @p2p_dev_addr: Limit allowed PBC devices to the specified P2P device, %NULL 954 * indicates no such filtering 955 * Returns: 0 on success, -1 on failure, -2 on session overlap 956 * 957 * This function is called on an AP when a push button is pushed to activate 958 * PBC mode. The PBC mode will be stopped after walk time (2 minutes) timeout 959 * or when a PBC registration is completed. If more than one Enrollee in active 960 * PBC mode has been detected during the monitor time (previous 2 minutes), the 961 * PBC mode is not activated and -2 is returned to indicate session overlap. 962 * This is skipped if a specific Enrollee is selected. 963 */ 964int wps_registrar_button_pushed(struct wps_registrar *reg, 965 const u8 *p2p_dev_addr) 966{ 967 if (p2p_dev_addr == NULL && 968 wps_registrar_pbc_overlap(reg, NULL, NULL)) { 969 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - do not start PBC " 970 "mode"); 971 wps_pbc_overlap_event(reg->wps); 972 return -2; 973 } 974 wpa_printf(MSG_DEBUG, "WPS: Button pushed - PBC mode started"); 975 reg->force_pbc_overlap = 0; 976 reg->selected_registrar = 1; 977 reg->pbc = 1; 978 if (p2p_dev_addr) 979 os_memcpy(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN); 980 else 981 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN); 982 wps_registrar_add_authorized_mac(reg, 983 (u8 *) "\xff\xff\xff\xff\xff\xff"); 984 wps_registrar_selected_registrar_changed(reg); 985 986 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 987 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 988 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wps_registrar_pbc_timeout, 989 reg, NULL); 990 return 0; 991} 992 993 994static void wps_registrar_pbc_completed(struct wps_registrar *reg) 995{ 996 wpa_printf(MSG_DEBUG, "WPS: PBC completed - stopping PBC mode"); 997 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 998 wps_registrar_stop_pbc(reg); 999} 1000 1001 1002static void wps_registrar_pin_completed(struct wps_registrar *reg) 1003{ 1004 wpa_printf(MSG_DEBUG, "WPS: PIN completed using internal Registrar"); 1005 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 1006 reg->selected_registrar = 0; 1007 wps_registrar_selected_registrar_changed(reg); 1008} 1009 1010 1011void wps_registrar_complete(struct wps_registrar *registrar, const u8 *uuid_e, 1012 const u8 *dev_pw, size_t dev_pw_len) 1013{ 1014 if (registrar->pbc) { 1015 wps_registrar_remove_pbc_session(registrar, 1016 uuid_e, NULL); 1017 wps_registrar_pbc_completed(registrar); 1018 } else { 1019 wps_registrar_pin_completed(registrar); 1020 } 1021 1022 if (dev_pw && 1023 wps_registrar_invalidate_wildcard_pin(registrar, dev_pw, 1024 dev_pw_len) == 0) { 1025 wpa_hexdump_key(MSG_DEBUG, "WPS: Invalidated wildcard PIN", 1026 dev_pw, dev_pw_len); 1027 } 1028} 1029 1030 1031int wps_registrar_wps_cancel(struct wps_registrar *reg) 1032{ 1033 if (reg->pbc) { 1034 wpa_printf(MSG_DEBUG, "WPS: PBC is set - cancelling it"); 1035 wps_registrar_pbc_timeout(reg, NULL); 1036 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 1037 return 1; 1038 } else if (reg->selected_registrar) { 1039 /* PIN Method */ 1040 wpa_printf(MSG_DEBUG, "WPS: PIN is set - cancelling it"); 1041 wps_registrar_pin_completed(reg); 1042 wps_registrar_invalidate_wildcard_pin(reg, NULL, 0); 1043 return 1; 1044 } 1045 return 0; 1046} 1047 1048 1049/** 1050 * wps_registrar_probe_req_rx - Notify Registrar of Probe Request 1051 * @reg: Registrar data from wps_registrar_init() 1052 * @addr: MAC address of the Probe Request sender 1053 * @wps_data: WPS IE contents 1054 * 1055 * This function is called on an AP when a Probe Request with WPS IE is 1056 * received. This is used to track PBC mode use and to detect possible overlap 1057 * situation with other WPS APs. 1058 */ 1059void wps_registrar_probe_req_rx(struct wps_registrar *reg, const u8 *addr, 1060 const struct wpabuf *wps_data, 1061 int p2p_wildcard) 1062{ 1063 struct wps_parse_attr attr; 1064 1065 wpa_hexdump_buf(MSG_MSGDUMP, 1066 "WPS: Probe Request with WPS data received", 1067 wps_data); 1068 1069 if (wps_parse_msg(wps_data, &attr) < 0) 1070 return; 1071 1072 if (attr.config_methods == NULL) { 1073 wpa_printf(MSG_DEBUG, "WPS: No Config Methods attribute in " 1074 "Probe Request"); 1075 return; 1076 } 1077 1078 if (attr.dev_password_id == NULL) { 1079 wpa_printf(MSG_DEBUG, "WPS: No Device Password Id attribute " 1080 "in Probe Request"); 1081 return; 1082 } 1083 1084 if (reg->enrollee_seen_cb && attr.uuid_e && 1085 attr.primary_dev_type && attr.request_type && !p2p_wildcard) { 1086 char *dev_name = NULL; 1087 if (attr.dev_name) { 1088 dev_name = os_zalloc(attr.dev_name_len + 1); 1089 if (dev_name) { 1090 os_memcpy(dev_name, attr.dev_name, 1091 attr.dev_name_len); 1092 } 1093 } 1094 reg->enrollee_seen_cb(reg->cb_ctx, addr, attr.uuid_e, 1095 attr.primary_dev_type, 1096 WPA_GET_BE16(attr.config_methods), 1097 WPA_GET_BE16(attr.dev_password_id), 1098 *attr.request_type, dev_name); 1099 os_free(dev_name); 1100 } 1101 1102 if (WPA_GET_BE16(attr.dev_password_id) != DEV_PW_PUSHBUTTON) 1103 return; /* Not PBC */ 1104 1105 wpa_printf(MSG_DEBUG, "WPS: Probe Request for PBC received from " 1106 MACSTR, MAC2STR(addr)); 1107 if (attr.uuid_e == NULL) { 1108 wpa_printf(MSG_DEBUG, "WPS: Invalid Probe Request WPS IE: No " 1109 "UUID-E included"); 1110 return; 1111 } 1112 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E from Probe Request", attr.uuid_e, 1113 WPS_UUID_LEN); 1114 1115 wps_registrar_add_pbc_session(reg, addr, attr.uuid_e); 1116 if (wps_registrar_pbc_overlap(reg, addr, attr.uuid_e)) { 1117 wpa_printf(MSG_DEBUG, "WPS: PBC session overlap detected"); 1118 reg->force_pbc_overlap = 1; 1119 wps_pbc_overlap_event(reg->wps); 1120 } 1121} 1122 1123 1124static int wps_cb_new_psk(struct wps_registrar *reg, const u8 *mac_addr, 1125 const u8 *psk, size_t psk_len) 1126{ 1127 if (reg->new_psk_cb == NULL) 1128 return 0; 1129 1130 return reg->new_psk_cb(reg->cb_ctx, mac_addr, psk, psk_len); 1131} 1132 1133 1134static void wps_cb_pin_needed(struct wps_registrar *reg, const u8 *uuid_e, 1135 const struct wps_device_data *dev) 1136{ 1137 if (reg->pin_needed_cb == NULL) 1138 return; 1139 1140 reg->pin_needed_cb(reg->cb_ctx, uuid_e, dev); 1141} 1142 1143 1144static void wps_cb_reg_success(struct wps_registrar *reg, const u8 *mac_addr, 1145 const u8 *uuid_e, const u8 *dev_pw, 1146 size_t dev_pw_len) 1147{ 1148 if (reg->reg_success_cb == NULL) 1149 return; 1150 1151 reg->reg_success_cb(reg->cb_ctx, mac_addr, uuid_e, dev_pw, dev_pw_len); 1152} 1153 1154 1155static int wps_cb_set_ie(struct wps_registrar *reg, struct wpabuf *beacon_ie, 1156 struct wpabuf *probe_resp_ie) 1157{ 1158 return reg->set_ie_cb(reg->cb_ctx, beacon_ie, probe_resp_ie); 1159} 1160 1161 1162static void wps_cb_set_sel_reg(struct wps_registrar *reg) 1163{ 1164 u16 methods = 0; 1165 if (reg->set_sel_reg_cb == NULL) 1166 return; 1167 1168 if (reg->selected_registrar) { 1169 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 1170#ifdef CONFIG_WPS2 1171 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 1172 WPS_CONFIG_PHY_PUSHBUTTON); 1173#endif /* CONFIG_WPS2 */ 1174 if (reg->pbc) 1175 wps_set_pushbutton(&methods, reg->wps->config_methods); 1176 } 1177 1178 wpa_printf(MSG_DEBUG, "WPS: wps_cb_set_sel_reg: sel_reg=%d " 1179 "config_methods=0x%x pbc=%d methods=0x%x", 1180 reg->selected_registrar, reg->wps->config_methods, 1181 reg->pbc, methods); 1182 1183 reg->set_sel_reg_cb(reg->cb_ctx, reg->selected_registrar, 1184 reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT, 1185 methods); 1186} 1187 1188 1189static int wps_set_ie(struct wps_registrar *reg) 1190{ 1191 struct wpabuf *beacon; 1192 struct wpabuf *probe; 1193 const u8 *auth_macs; 1194 size_t count; 1195 size_t vendor_len = 0; 1196 int i; 1197 1198 if (reg->set_ie_cb == NULL) 1199 return 0; 1200 1201 for (i = 0; i < MAX_WPS_VENDOR_EXTENSIONS; i++) { 1202 if (reg->wps->dev.vendor_ext[i]) { 1203 vendor_len += 2 + 2; 1204 vendor_len += wpabuf_len(reg->wps->dev.vendor_ext[i]); 1205 } 1206 } 1207 1208 beacon = wpabuf_alloc(400 + vendor_len); 1209 if (beacon == NULL) 1210 return -1; 1211 probe = wpabuf_alloc(500 + vendor_len); 1212 if (probe == NULL) { 1213 wpabuf_free(beacon); 1214 return -1; 1215 } 1216 1217 auth_macs = wps_authorized_macs(reg, &count); 1218 1219 wpa_printf(MSG_DEBUG, "WPS: Build Beacon IEs"); 1220 1221 if (wps_build_version(beacon) || 1222 wps_build_wps_state(reg->wps, beacon) || 1223 wps_build_ap_setup_locked(reg->wps, beacon) || 1224 wps_build_selected_registrar(reg, beacon) || 1225 wps_build_sel_reg_dev_password_id(reg, beacon) || 1226 wps_build_sel_reg_config_methods(reg, beacon) || 1227 wps_build_sel_pbc_reg_uuid_e(reg, beacon) || 1228 (reg->dualband && wps_build_rf_bands(®->wps->dev, beacon)) || 1229 wps_build_wfa_ext(beacon, 0, auth_macs, count) || 1230 wps_build_vendor_ext(®->wps->dev, beacon)) { 1231 wpabuf_free(beacon); 1232 wpabuf_free(probe); 1233 return -1; 1234 } 1235 1236#ifdef CONFIG_P2P 1237 if (wps_build_dev_name(®->wps->dev, beacon) || 1238 wps_build_primary_dev_type(®->wps->dev, beacon)) { 1239 wpabuf_free(beacon); 1240 wpabuf_free(probe); 1241 return -1; 1242 } 1243#endif /* CONFIG_P2P */ 1244 1245 wpa_printf(MSG_DEBUG, "WPS: Build Probe Response IEs"); 1246 1247 if (wps_build_version(probe) || 1248 wps_build_wps_state(reg->wps, probe) || 1249 wps_build_ap_setup_locked(reg->wps, probe) || 1250 wps_build_selected_registrar(reg, probe) || 1251 wps_build_sel_reg_dev_password_id(reg, probe) || 1252 wps_build_sel_reg_config_methods(reg, probe) || 1253 wps_build_resp_type(probe, reg->wps->ap ? WPS_RESP_AP : 1254 WPS_RESP_REGISTRAR) || 1255 wps_build_uuid_e(probe, reg->wps->uuid) || 1256 wps_build_device_attrs(®->wps->dev, probe) || 1257 wps_build_probe_config_methods(reg, probe) || 1258 wps_build_rf_bands(®->wps->dev, probe) || 1259 wps_build_wfa_ext(probe, 0, auth_macs, count) || 1260 wps_build_vendor_ext(®->wps->dev, probe)) { 1261 wpabuf_free(beacon); 1262 wpabuf_free(probe); 1263 return -1; 1264 } 1265 1266 beacon = wps_ie_encapsulate(beacon); 1267 probe = wps_ie_encapsulate(probe); 1268 1269 if (!beacon || !probe) { 1270 wpabuf_free(beacon); 1271 wpabuf_free(probe); 1272 return -1; 1273 } 1274 1275 if (reg->static_wep_only) { 1276 /* 1277 * Windows XP and Vista clients can get confused about 1278 * EAP-Identity/Request when they probe the network with 1279 * EAPOL-Start. In such a case, they may assume the network is 1280 * using IEEE 802.1X and prompt user for a certificate while 1281 * the correct (non-WPS) behavior would be to ask for the 1282 * static WEP key. As a workaround, use Microsoft Provisioning 1283 * IE to advertise that legacy 802.1X is not supported. 1284 */ 1285 const u8 ms_wps[7] = { 1286 WLAN_EID_VENDOR_SPECIFIC, 5, 1287 /* Microsoft Provisioning IE (00:50:f2:5) */ 1288 0x00, 0x50, 0xf2, 5, 1289 0x00 /* no legacy 802.1X or MS WPS */ 1290 }; 1291 wpa_printf(MSG_DEBUG, "WPS: Add Microsoft Provisioning IE " 1292 "into Beacon/Probe Response frames"); 1293 wpabuf_put_data(beacon, ms_wps, sizeof(ms_wps)); 1294 wpabuf_put_data(probe, ms_wps, sizeof(ms_wps)); 1295 } 1296 1297 return wps_cb_set_ie(reg, beacon, probe); 1298} 1299 1300 1301static int wps_get_dev_password(struct wps_data *wps) 1302{ 1303 const u8 *pin; 1304 size_t pin_len = 0; 1305 1306 os_free(wps->dev_password); 1307 wps->dev_password = NULL; 1308 1309 if (wps->pbc) { 1310 wpa_printf(MSG_DEBUG, "WPS: Use default PIN for PBC"); 1311 pin = (const u8 *) "00000000"; 1312 pin_len = 8; 1313#ifdef CONFIG_WPS_NFC 1314 } else if (wps->nfc_pw_token) { 1315 wpa_printf(MSG_DEBUG, "WPS: Use OOB Device Password from NFC " 1316 "Password Token"); 1317 pin = wps->nfc_pw_token->dev_pw; 1318 pin_len = wps->nfc_pw_token->dev_pw_len; 1319#endif /* CONFIG_WPS_NFC */ 1320 } else { 1321 pin = wps_registrar_get_pin(wps->wps->registrar, wps->uuid_e, 1322 &pin_len); 1323 } 1324 if (pin == NULL) { 1325 wpa_printf(MSG_DEBUG, "WPS: No Device Password available for " 1326 "the Enrollee"); 1327 wps_cb_pin_needed(wps->wps->registrar, wps->uuid_e, 1328 &wps->peer_dev); 1329 return -1; 1330 } 1331 1332 wps->dev_password = os_malloc(pin_len); 1333 if (wps->dev_password == NULL) 1334 return -1; 1335 os_memcpy(wps->dev_password, pin, pin_len); 1336 wps->dev_password_len = pin_len; 1337 1338 return 0; 1339} 1340 1341 1342static int wps_build_uuid_r(struct wps_data *wps, struct wpabuf *msg) 1343{ 1344 wpa_printf(MSG_DEBUG, "WPS: * UUID-R"); 1345 wpabuf_put_be16(msg, ATTR_UUID_R); 1346 wpabuf_put_be16(msg, WPS_UUID_LEN); 1347 wpabuf_put_data(msg, wps->uuid_r, WPS_UUID_LEN); 1348 return 0; 1349} 1350 1351 1352static int wps_build_r_hash(struct wps_data *wps, struct wpabuf *msg) 1353{ 1354 u8 *hash; 1355 const u8 *addr[4]; 1356 size_t len[4]; 1357 1358 if (random_get_bytes(wps->snonce, 2 * WPS_SECRET_NONCE_LEN) < 0) 1359 return -1; 1360 wpa_hexdump(MSG_DEBUG, "WPS: R-S1", wps->snonce, WPS_SECRET_NONCE_LEN); 1361 wpa_hexdump(MSG_DEBUG, "WPS: R-S2", 1362 wps->snonce + WPS_SECRET_NONCE_LEN, WPS_SECRET_NONCE_LEN); 1363 1364 if (wps->dh_pubkey_e == NULL || wps->dh_pubkey_r == NULL) { 1365 wpa_printf(MSG_DEBUG, "WPS: DH public keys not available for " 1366 "R-Hash derivation"); 1367 return -1; 1368 } 1369 1370 wpa_printf(MSG_DEBUG, "WPS: * R-Hash1"); 1371 wpabuf_put_be16(msg, ATTR_R_HASH1); 1372 wpabuf_put_be16(msg, SHA256_MAC_LEN); 1373 hash = wpabuf_put(msg, SHA256_MAC_LEN); 1374 /* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */ 1375 addr[0] = wps->snonce; 1376 len[0] = WPS_SECRET_NONCE_LEN; 1377 addr[1] = wps->psk1; 1378 len[1] = WPS_PSK_LEN; 1379 addr[2] = wpabuf_head(wps->dh_pubkey_e); 1380 len[2] = wpabuf_len(wps->dh_pubkey_e); 1381 addr[3] = wpabuf_head(wps->dh_pubkey_r); 1382 len[3] = wpabuf_len(wps->dh_pubkey_r); 1383 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 1384 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash1", hash, SHA256_MAC_LEN); 1385 1386 wpa_printf(MSG_DEBUG, "WPS: * R-Hash2"); 1387 wpabuf_put_be16(msg, ATTR_R_HASH2); 1388 wpabuf_put_be16(msg, SHA256_MAC_LEN); 1389 hash = wpabuf_put(msg, SHA256_MAC_LEN); 1390 /* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */ 1391 addr[0] = wps->snonce + WPS_SECRET_NONCE_LEN; 1392 addr[1] = wps->psk2; 1393 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 1394 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash2", hash, SHA256_MAC_LEN); 1395 1396 return 0; 1397} 1398 1399 1400static int wps_build_r_snonce1(struct wps_data *wps, struct wpabuf *msg) 1401{ 1402 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce1"); 1403 wpabuf_put_be16(msg, ATTR_R_SNONCE1); 1404 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN); 1405 wpabuf_put_data(msg, wps->snonce, WPS_SECRET_NONCE_LEN); 1406 return 0; 1407} 1408 1409 1410static int wps_build_r_snonce2(struct wps_data *wps, struct wpabuf *msg) 1411{ 1412 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce2"); 1413 wpabuf_put_be16(msg, ATTR_R_SNONCE2); 1414 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN); 1415 wpabuf_put_data(msg, wps->snonce + WPS_SECRET_NONCE_LEN, 1416 WPS_SECRET_NONCE_LEN); 1417 return 0; 1418} 1419 1420 1421static int wps_build_cred_network_idx(struct wpabuf *msg, 1422 const struct wps_credential *cred) 1423{ 1424 wpa_printf(MSG_DEBUG, "WPS: * Network Index (1)"); 1425 wpabuf_put_be16(msg, ATTR_NETWORK_INDEX); 1426 wpabuf_put_be16(msg, 1); 1427 wpabuf_put_u8(msg, 1); 1428 return 0; 1429} 1430 1431 1432static int wps_build_cred_ssid(struct wpabuf *msg, 1433 const struct wps_credential *cred) 1434{ 1435 wpa_printf(MSG_DEBUG, "WPS: * SSID"); 1436 wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID for Credential", 1437 cred->ssid, cred->ssid_len); 1438 wpabuf_put_be16(msg, ATTR_SSID); 1439 wpabuf_put_be16(msg, cred->ssid_len); 1440 wpabuf_put_data(msg, cred->ssid, cred->ssid_len); 1441 return 0; 1442} 1443 1444 1445static int wps_build_cred_auth_type(struct wpabuf *msg, 1446 const struct wps_credential *cred) 1447{ 1448 wpa_printf(MSG_DEBUG, "WPS: * Authentication Type (0x%x)", 1449 cred->auth_type); 1450 wpabuf_put_be16(msg, ATTR_AUTH_TYPE); 1451 wpabuf_put_be16(msg, 2); 1452 wpabuf_put_be16(msg, cred->auth_type); 1453 return 0; 1454} 1455 1456 1457static int wps_build_cred_encr_type(struct wpabuf *msg, 1458 const struct wps_credential *cred) 1459{ 1460 wpa_printf(MSG_DEBUG, "WPS: * Encryption Type (0x%x)", 1461 cred->encr_type); 1462 wpabuf_put_be16(msg, ATTR_ENCR_TYPE); 1463 wpabuf_put_be16(msg, 2); 1464 wpabuf_put_be16(msg, cred->encr_type); 1465 return 0; 1466} 1467 1468 1469static int wps_build_cred_network_key(struct wpabuf *msg, 1470 const struct wps_credential *cred) 1471{ 1472 wpa_printf(MSG_DEBUG, "WPS: * Network Key (len=%d)", 1473 (int) cred->key_len); 1474 wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key", 1475 cred->key, cred->key_len); 1476 wpabuf_put_be16(msg, ATTR_NETWORK_KEY); 1477 wpabuf_put_be16(msg, cred->key_len); 1478 wpabuf_put_data(msg, cred->key, cred->key_len); 1479 return 0; 1480} 1481 1482 1483static int wps_build_cred_mac_addr(struct wpabuf *msg, 1484 const struct wps_credential *cred) 1485{ 1486 wpa_printf(MSG_DEBUG, "WPS: * MAC Address (" MACSTR ")", 1487 MAC2STR(cred->mac_addr)); 1488 wpabuf_put_be16(msg, ATTR_MAC_ADDR); 1489 wpabuf_put_be16(msg, ETH_ALEN); 1490 wpabuf_put_data(msg, cred->mac_addr, ETH_ALEN); 1491 return 0; 1492} 1493 1494 1495static int wps_build_credential(struct wpabuf *msg, 1496 const struct wps_credential *cred) 1497{ 1498 if (wps_build_cred_network_idx(msg, cred) || 1499 wps_build_cred_ssid(msg, cred) || 1500 wps_build_cred_auth_type(msg, cred) || 1501 wps_build_cred_encr_type(msg, cred) || 1502 wps_build_cred_network_key(msg, cred) || 1503 wps_build_cred_mac_addr(msg, cred)) 1504 return -1; 1505 return 0; 1506} 1507 1508 1509int wps_build_credential_wrap(struct wpabuf *msg, 1510 const struct wps_credential *cred) 1511{ 1512 struct wpabuf *wbuf; 1513 wbuf = wpabuf_alloc(200); 1514 if (wbuf == NULL) 1515 return -1; 1516 if (wps_build_credential(wbuf, cred)) { 1517 wpabuf_free(wbuf); 1518 return -1; 1519 } 1520 wpabuf_put_be16(msg, ATTR_CRED); 1521 wpabuf_put_be16(msg, wpabuf_len(wbuf)); 1522 wpabuf_put_buf(msg, wbuf); 1523 wpabuf_free(wbuf); 1524 return 0; 1525} 1526 1527 1528int wps_build_cred(struct wps_data *wps, struct wpabuf *msg) 1529{ 1530 struct wpabuf *cred; 1531 1532 if (wps->wps->registrar->skip_cred_build) 1533 goto skip_cred_build; 1534 1535 wpa_printf(MSG_DEBUG, "WPS: * Credential"); 1536 if (wps->use_cred) { 1537 os_memcpy(&wps->cred, wps->use_cred, sizeof(wps->cred)); 1538 goto use_provided; 1539 } 1540 os_memset(&wps->cred, 0, sizeof(wps->cred)); 1541 1542 os_memcpy(wps->cred.ssid, wps->wps->ssid, wps->wps->ssid_len); 1543 wps->cred.ssid_len = wps->wps->ssid_len; 1544 1545 /* Select the best authentication and encryption type */ 1546 if (wps->auth_type & WPS_AUTH_WPA2PSK) 1547 wps->auth_type = WPS_AUTH_WPA2PSK; 1548 else if (wps->auth_type & WPS_AUTH_WPAPSK) 1549 wps->auth_type = WPS_AUTH_WPAPSK; 1550 else if (wps->auth_type & WPS_AUTH_OPEN) 1551 wps->auth_type = WPS_AUTH_OPEN; 1552 else if (wps->auth_type & WPS_AUTH_SHARED) 1553 wps->auth_type = WPS_AUTH_SHARED; 1554 else { 1555 wpa_printf(MSG_DEBUG, "WPS: Unsupported auth_type 0x%x", 1556 wps->auth_type); 1557 return -1; 1558 } 1559 wps->cred.auth_type = wps->auth_type; 1560 1561 if (wps->auth_type == WPS_AUTH_WPA2PSK || 1562 wps->auth_type == WPS_AUTH_WPAPSK) { 1563 if (wps->encr_type & WPS_ENCR_AES) 1564 wps->encr_type = WPS_ENCR_AES; 1565 else if (wps->encr_type & WPS_ENCR_TKIP) 1566 wps->encr_type = WPS_ENCR_TKIP; 1567 else { 1568 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption " 1569 "type for WPA/WPA2"); 1570 return -1; 1571 } 1572 } else { 1573 if (wps->encr_type & WPS_ENCR_WEP) 1574 wps->encr_type = WPS_ENCR_WEP; 1575 else if (wps->encr_type & WPS_ENCR_NONE) 1576 wps->encr_type = WPS_ENCR_NONE; 1577 else { 1578 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption " 1579 "type for non-WPA/WPA2 mode"); 1580 return -1; 1581 } 1582 } 1583 wps->cred.encr_type = wps->encr_type; 1584 /* 1585 * Set MAC address in the Credential to be the Enrollee's MAC address 1586 */ 1587 os_memcpy(wps->cred.mac_addr, wps->mac_addr_e, ETH_ALEN); 1588 1589 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->wps->ap && 1590 !wps->wps->registrar->disable_auto_conf) { 1591 u8 r[16]; 1592 /* Generate a random passphrase */ 1593 if (random_get_bytes(r, sizeof(r)) < 0) 1594 return -1; 1595 os_free(wps->new_psk); 1596 wps->new_psk = base64_encode(r, sizeof(r), &wps->new_psk_len); 1597 if (wps->new_psk == NULL) 1598 return -1; 1599 wps->new_psk_len--; /* remove newline */ 1600 while (wps->new_psk_len && 1601 wps->new_psk[wps->new_psk_len - 1] == '=') 1602 wps->new_psk_len--; 1603 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Generated passphrase", 1604 wps->new_psk, wps->new_psk_len); 1605 os_memcpy(wps->cred.key, wps->new_psk, wps->new_psk_len); 1606 wps->cred.key_len = wps->new_psk_len; 1607 } else if (wps->use_psk_key && wps->wps->psk_set) { 1608 char hex[65]; 1609 wpa_printf(MSG_DEBUG, "WPS: Use PSK format for Network Key"); 1610 wpa_snprintf_hex(hex, sizeof(hex), wps->wps->psk, 32); 1611 os_memcpy(wps->cred.key, hex, 32 * 2); 1612 wps->cred.key_len = 32 * 2; 1613 } else if (wps->wps->network_key) { 1614 os_memcpy(wps->cred.key, wps->wps->network_key, 1615 wps->wps->network_key_len); 1616 wps->cred.key_len = wps->wps->network_key_len; 1617 } else if (wps->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) { 1618 char hex[65]; 1619 /* Generate a random per-device PSK */ 1620 os_free(wps->new_psk); 1621 wps->new_psk_len = 32; 1622 wps->new_psk = os_malloc(wps->new_psk_len); 1623 if (wps->new_psk == NULL) 1624 return -1; 1625 if (random_get_bytes(wps->new_psk, wps->new_psk_len) < 0) { 1626 os_free(wps->new_psk); 1627 wps->new_psk = NULL; 1628 return -1; 1629 } 1630 wpa_hexdump_key(MSG_DEBUG, "WPS: Generated per-device PSK", 1631 wps->new_psk, wps->new_psk_len); 1632 wpa_snprintf_hex(hex, sizeof(hex), wps->new_psk, 1633 wps->new_psk_len); 1634 os_memcpy(wps->cred.key, hex, wps->new_psk_len * 2); 1635 wps->cred.key_len = wps->new_psk_len * 2; 1636 } 1637 1638use_provided: 1639#ifdef CONFIG_WPS_TESTING 1640 if (wps_testing_dummy_cred) 1641 cred = wpabuf_alloc(200); 1642 else 1643 cred = NULL; 1644 if (cred) { 1645 struct wps_credential dummy; 1646 wpa_printf(MSG_DEBUG, "WPS: Add dummy credential"); 1647 os_memset(&dummy, 0, sizeof(dummy)); 1648 os_memcpy(dummy.ssid, "dummy", 5); 1649 dummy.ssid_len = 5; 1650 dummy.auth_type = WPS_AUTH_WPA2PSK; 1651 dummy.encr_type = WPS_ENCR_AES; 1652 os_memcpy(dummy.key, "dummy psk", 9); 1653 dummy.key_len = 9; 1654 os_memcpy(dummy.mac_addr, wps->mac_addr_e, ETH_ALEN); 1655 wps_build_credential(cred, &dummy); 1656 wpa_hexdump_buf(MSG_DEBUG, "WPS: Dummy Credential", cred); 1657 1658 wpabuf_put_be16(msg, ATTR_CRED); 1659 wpabuf_put_be16(msg, wpabuf_len(cred)); 1660 wpabuf_put_buf(msg, cred); 1661 1662 wpabuf_free(cred); 1663 } 1664#endif /* CONFIG_WPS_TESTING */ 1665 1666 cred = wpabuf_alloc(200); 1667 if (cred == NULL) 1668 return -1; 1669 1670 if (wps_build_credential(cred, &wps->cred)) { 1671 wpabuf_free(cred); 1672 return -1; 1673 } 1674 1675 wpabuf_put_be16(msg, ATTR_CRED); 1676 wpabuf_put_be16(msg, wpabuf_len(cred)); 1677 wpabuf_put_buf(msg, cred); 1678 wpabuf_free(cred); 1679 1680skip_cred_build: 1681 if (wps->wps->registrar->extra_cred) { 1682 wpa_printf(MSG_DEBUG, "WPS: * Credential (pre-configured)"); 1683 wpabuf_put_buf(msg, wps->wps->registrar->extra_cred); 1684 } 1685 1686 return 0; 1687} 1688 1689 1690static int wps_build_ap_settings(struct wps_data *wps, struct wpabuf *msg) 1691{ 1692 wpa_printf(MSG_DEBUG, "WPS: * AP Settings"); 1693 1694 if (wps_build_credential(msg, &wps->cred)) 1695 return -1; 1696 1697 return 0; 1698} 1699 1700 1701static struct wpabuf * wps_build_ap_cred(struct wps_data *wps) 1702{ 1703 struct wpabuf *msg, *plain; 1704 1705 msg = wpabuf_alloc(1000); 1706 if (msg == NULL) 1707 return NULL; 1708 1709 plain = wpabuf_alloc(200); 1710 if (plain == NULL) { 1711 wpabuf_free(msg); 1712 return NULL; 1713 } 1714 1715 if (wps_build_ap_settings(wps, plain)) { 1716 wpabuf_free(plain); 1717 wpabuf_free(msg); 1718 return NULL; 1719 } 1720 1721 wpabuf_put_be16(msg, ATTR_CRED); 1722 wpabuf_put_be16(msg, wpabuf_len(plain)); 1723 wpabuf_put_buf(msg, plain); 1724 wpabuf_free(plain); 1725 1726 return msg; 1727} 1728 1729 1730static struct wpabuf * wps_build_m2(struct wps_data *wps) 1731{ 1732 struct wpabuf *msg; 1733 1734 if (random_get_bytes(wps->nonce_r, WPS_NONCE_LEN) < 0) 1735 return NULL; 1736 wpa_hexdump(MSG_DEBUG, "WPS: Registrar Nonce", 1737 wps->nonce_r, WPS_NONCE_LEN); 1738 wpa_hexdump(MSG_DEBUG, "WPS: UUID-R", wps->uuid_r, WPS_UUID_LEN); 1739 1740 wpa_printf(MSG_DEBUG, "WPS: Building Message M2"); 1741 msg = wpabuf_alloc(1000); 1742 if (msg == NULL) 1743 return NULL; 1744 1745 if (wps_build_version(msg) || 1746 wps_build_msg_type(msg, WPS_M2) || 1747 wps_build_enrollee_nonce(wps, msg) || 1748 wps_build_registrar_nonce(wps, msg) || 1749 wps_build_uuid_r(wps, msg) || 1750 wps_build_public_key(wps, msg) || 1751 wps_derive_keys(wps) || 1752 wps_build_auth_type_flags(wps, msg) || 1753 wps_build_encr_type_flags(wps, msg) || 1754 wps_build_conn_type_flags(wps, msg) || 1755 wps_build_config_methods_r(wps->wps->registrar, msg) || 1756 wps_build_device_attrs(&wps->wps->dev, msg) || 1757 wps_build_rf_bands(&wps->wps->dev, msg) || 1758 wps_build_assoc_state(wps, msg) || 1759 wps_build_config_error(msg, WPS_CFG_NO_ERROR) || 1760 wps_build_dev_password_id(msg, wps->dev_pw_id) || 1761 wps_build_os_version(&wps->wps->dev, msg) || 1762 wps_build_wfa_ext(msg, 0, NULL, 0) || 1763 wps_build_authenticator(wps, msg)) { 1764 wpabuf_free(msg); 1765 return NULL; 1766 } 1767 1768 wps->int_reg = 1; 1769 wps->state = RECV_M3; 1770 return msg; 1771} 1772 1773 1774static struct wpabuf * wps_build_m2d(struct wps_data *wps) 1775{ 1776 struct wpabuf *msg; 1777 u16 err = wps->config_error; 1778 1779 wpa_printf(MSG_DEBUG, "WPS: Building Message M2D"); 1780 msg = wpabuf_alloc(1000); 1781 if (msg == NULL) 1782 return NULL; 1783 1784 if (wps->wps->ap && wps->wps->ap_setup_locked && 1785 err == WPS_CFG_NO_ERROR) 1786 err = WPS_CFG_SETUP_LOCKED; 1787 1788 if (wps_build_version(msg) || 1789 wps_build_msg_type(msg, WPS_M2D) || 1790 wps_build_enrollee_nonce(wps, msg) || 1791 wps_build_registrar_nonce(wps, msg) || 1792 wps_build_uuid_r(wps, msg) || 1793 wps_build_auth_type_flags(wps, msg) || 1794 wps_build_encr_type_flags(wps, msg) || 1795 wps_build_conn_type_flags(wps, msg) || 1796 wps_build_config_methods_r(wps->wps->registrar, msg) || 1797 wps_build_device_attrs(&wps->wps->dev, msg) || 1798 wps_build_rf_bands(&wps->wps->dev, msg) || 1799 wps_build_assoc_state(wps, msg) || 1800 wps_build_config_error(msg, err) || 1801 wps_build_os_version(&wps->wps->dev, msg) || 1802 wps_build_wfa_ext(msg, 0, NULL, 0)) { 1803 wpabuf_free(msg); 1804 return NULL; 1805 } 1806 1807 wps->state = RECV_M2D_ACK; 1808 return msg; 1809} 1810 1811 1812static struct wpabuf * wps_build_m4(struct wps_data *wps) 1813{ 1814 struct wpabuf *msg, *plain; 1815 1816 wpa_printf(MSG_DEBUG, "WPS: Building Message M4"); 1817 1818 wps_derive_psk(wps, wps->dev_password, wps->dev_password_len); 1819 1820 plain = wpabuf_alloc(200); 1821 if (plain == NULL) 1822 return NULL; 1823 1824 msg = wpabuf_alloc(1000); 1825 if (msg == NULL) { 1826 wpabuf_free(plain); 1827 return NULL; 1828 } 1829 1830 if (wps_build_version(msg) || 1831 wps_build_msg_type(msg, WPS_M4) || 1832 wps_build_enrollee_nonce(wps, msg) || 1833 wps_build_r_hash(wps, msg) || 1834 wps_build_r_snonce1(wps, plain) || 1835 wps_build_key_wrap_auth(wps, plain) || 1836 wps_build_encr_settings(wps, msg, plain) || 1837 wps_build_wfa_ext(msg, 0, NULL, 0) || 1838 wps_build_authenticator(wps, msg)) { 1839 wpabuf_free(plain); 1840 wpabuf_free(msg); 1841 return NULL; 1842 } 1843 wpabuf_free(plain); 1844 1845 wps->state = RECV_M5; 1846 return msg; 1847} 1848 1849 1850static struct wpabuf * wps_build_m6(struct wps_data *wps) 1851{ 1852 struct wpabuf *msg, *plain; 1853 1854 wpa_printf(MSG_DEBUG, "WPS: Building Message M6"); 1855 1856 plain = wpabuf_alloc(200); 1857 if (plain == NULL) 1858 return NULL; 1859 1860 msg = wpabuf_alloc(1000); 1861 if (msg == NULL) { 1862 wpabuf_free(plain); 1863 return NULL; 1864 } 1865 1866 if (wps_build_version(msg) || 1867 wps_build_msg_type(msg, WPS_M6) || 1868 wps_build_enrollee_nonce(wps, msg) || 1869 wps_build_r_snonce2(wps, plain) || 1870 wps_build_key_wrap_auth(wps, plain) || 1871 wps_build_encr_settings(wps, msg, plain) || 1872 wps_build_wfa_ext(msg, 0, NULL, 0) || 1873 wps_build_authenticator(wps, msg)) { 1874 wpabuf_free(plain); 1875 wpabuf_free(msg); 1876 return NULL; 1877 } 1878 wpabuf_free(plain); 1879 1880 wps->wps_pin_revealed = 1; 1881 wps->state = RECV_M7; 1882 return msg; 1883} 1884 1885 1886static struct wpabuf * wps_build_m8(struct wps_data *wps) 1887{ 1888 struct wpabuf *msg, *plain; 1889 1890 wpa_printf(MSG_DEBUG, "WPS: Building Message M8"); 1891 1892 plain = wpabuf_alloc(500); 1893 if (plain == NULL) 1894 return NULL; 1895 1896 msg = wpabuf_alloc(1000); 1897 if (msg == NULL) { 1898 wpabuf_free(plain); 1899 return NULL; 1900 } 1901 1902 if (wps_build_version(msg) || 1903 wps_build_msg_type(msg, WPS_M8) || 1904 wps_build_enrollee_nonce(wps, msg) || 1905 ((wps->wps->ap || wps->er) && wps_build_cred(wps, plain)) || 1906 (!wps->wps->ap && !wps->er && wps_build_ap_settings(wps, plain)) || 1907 wps_build_key_wrap_auth(wps, plain) || 1908 wps_build_encr_settings(wps, msg, plain) || 1909 wps_build_wfa_ext(msg, 0, NULL, 0) || 1910 wps_build_authenticator(wps, msg)) { 1911 wpabuf_free(plain); 1912 wpabuf_free(msg); 1913 return NULL; 1914 } 1915 wpabuf_free(plain); 1916 1917 wps->state = RECV_DONE; 1918 return msg; 1919} 1920 1921 1922struct wpabuf * wps_registrar_get_msg(struct wps_data *wps, 1923 enum wsc_op_code *op_code) 1924{ 1925 struct wpabuf *msg; 1926 1927#ifdef CONFIG_WPS_UPNP 1928 if (!wps->int_reg && wps->wps->wps_upnp) { 1929 struct upnp_pending_message *p, *prev = NULL; 1930 if (wps->ext_reg > 1) 1931 wps_registrar_free_pending_m2(wps->wps); 1932 p = wps->wps->upnp_msgs; 1933 /* TODO: check pending message MAC address */ 1934 while (p && p->next) { 1935 prev = p; 1936 p = p->next; 1937 } 1938 if (p) { 1939 wpa_printf(MSG_DEBUG, "WPS: Use pending message from " 1940 "UPnP"); 1941 if (prev) 1942 prev->next = NULL; 1943 else 1944 wps->wps->upnp_msgs = NULL; 1945 msg = p->msg; 1946 switch (p->type) { 1947 case WPS_WSC_ACK: 1948 *op_code = WSC_ACK; 1949 break; 1950 case WPS_WSC_NACK: 1951 *op_code = WSC_NACK; 1952 break; 1953 default: 1954 *op_code = WSC_MSG; 1955 break; 1956 } 1957 os_free(p); 1958 if (wps->ext_reg == 0) 1959 wps->ext_reg = 1; 1960 return msg; 1961 } 1962 } 1963 if (wps->ext_reg) { 1964 wpa_printf(MSG_DEBUG, "WPS: Using external Registrar, but no " 1965 "pending message available"); 1966 return NULL; 1967 } 1968#endif /* CONFIG_WPS_UPNP */ 1969 1970 switch (wps->state) { 1971 case SEND_M2: 1972 if (wps_get_dev_password(wps) < 0) 1973 msg = wps_build_m2d(wps); 1974 else 1975 msg = wps_build_m2(wps); 1976 *op_code = WSC_MSG; 1977 break; 1978 case SEND_M2D: 1979 msg = wps_build_m2d(wps); 1980 *op_code = WSC_MSG; 1981 break; 1982 case SEND_M4: 1983 msg = wps_build_m4(wps); 1984 *op_code = WSC_MSG; 1985 break; 1986 case SEND_M6: 1987 msg = wps_build_m6(wps); 1988 *op_code = WSC_MSG; 1989 break; 1990 case SEND_M8: 1991 msg = wps_build_m8(wps); 1992 *op_code = WSC_MSG; 1993 break; 1994 case RECV_DONE: 1995 msg = wps_build_wsc_ack(wps); 1996 *op_code = WSC_ACK; 1997 break; 1998 case SEND_WSC_NACK: 1999 msg = wps_build_wsc_nack(wps); 2000 *op_code = WSC_NACK; 2001 break; 2002 default: 2003 wpa_printf(MSG_DEBUG, "WPS: Unsupported state %d for building " 2004 "a message", wps->state); 2005 msg = NULL; 2006 break; 2007 } 2008 2009 if (*op_code == WSC_MSG && msg) { 2010 /* Save a copy of the last message for Authenticator derivation 2011 */ 2012 wpabuf_free(wps->last_msg); 2013 wps->last_msg = wpabuf_dup(msg); 2014 } 2015 2016 return msg; 2017} 2018 2019 2020static int wps_process_enrollee_nonce(struct wps_data *wps, const u8 *e_nonce) 2021{ 2022 if (e_nonce == NULL) { 2023 wpa_printf(MSG_DEBUG, "WPS: No Enrollee Nonce received"); 2024 return -1; 2025 } 2026 2027 os_memcpy(wps->nonce_e, e_nonce, WPS_NONCE_LEN); 2028 wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce", 2029 wps->nonce_e, WPS_NONCE_LEN); 2030 2031 return 0; 2032} 2033 2034 2035static int wps_process_registrar_nonce(struct wps_data *wps, const u8 *r_nonce) 2036{ 2037 if (r_nonce == NULL) { 2038 wpa_printf(MSG_DEBUG, "WPS: No Registrar Nonce received"); 2039 return -1; 2040 } 2041 2042 if (os_memcmp(wps->nonce_r, r_nonce, WPS_NONCE_LEN) != 0) { 2043 wpa_printf(MSG_DEBUG, "WPS: Invalid Registrar Nonce received"); 2044 return -1; 2045 } 2046 2047 return 0; 2048} 2049 2050 2051static int wps_process_uuid_e(struct wps_data *wps, const u8 *uuid_e) 2052{ 2053 if (uuid_e == NULL) { 2054 wpa_printf(MSG_DEBUG, "WPS: No UUID-E received"); 2055 return -1; 2056 } 2057 2058 os_memcpy(wps->uuid_e, uuid_e, WPS_UUID_LEN); 2059 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", wps->uuid_e, WPS_UUID_LEN); 2060 2061 return 0; 2062} 2063 2064 2065static int wps_process_dev_password_id(struct wps_data *wps, const u8 *pw_id) 2066{ 2067 if (pw_id == NULL) { 2068 wpa_printf(MSG_DEBUG, "WPS: No Device Password ID received"); 2069 return -1; 2070 } 2071 2072 wps->dev_pw_id = WPA_GET_BE16(pw_id); 2073 wpa_printf(MSG_DEBUG, "WPS: Device Password ID %d", wps->dev_pw_id); 2074 2075 return 0; 2076} 2077 2078 2079static int wps_process_e_hash1(struct wps_data *wps, const u8 *e_hash1) 2080{ 2081 if (e_hash1 == NULL) { 2082 wpa_printf(MSG_DEBUG, "WPS: No E-Hash1 received"); 2083 return -1; 2084 } 2085 2086 os_memcpy(wps->peer_hash1, e_hash1, WPS_HASH_LEN); 2087 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash1", wps->peer_hash1, WPS_HASH_LEN); 2088 2089 return 0; 2090} 2091 2092 2093static int wps_process_e_hash2(struct wps_data *wps, const u8 *e_hash2) 2094{ 2095 if (e_hash2 == NULL) { 2096 wpa_printf(MSG_DEBUG, "WPS: No E-Hash2 received"); 2097 return -1; 2098 } 2099 2100 os_memcpy(wps->peer_hash2, e_hash2, WPS_HASH_LEN); 2101 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash2", wps->peer_hash2, WPS_HASH_LEN); 2102 2103 return 0; 2104} 2105 2106 2107static int wps_process_e_snonce1(struct wps_data *wps, const u8 *e_snonce1) 2108{ 2109 u8 hash[SHA256_MAC_LEN]; 2110 const u8 *addr[4]; 2111 size_t len[4]; 2112 2113 if (e_snonce1 == NULL) { 2114 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce1 received"); 2115 return -1; 2116 } 2117 2118 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce1", e_snonce1, 2119 WPS_SECRET_NONCE_LEN); 2120 2121 /* E-Hash1 = HMAC_AuthKey(E-S1 || PSK1 || PK_E || PK_R) */ 2122 addr[0] = e_snonce1; 2123 len[0] = WPS_SECRET_NONCE_LEN; 2124 addr[1] = wps->psk1; 2125 len[1] = WPS_PSK_LEN; 2126 addr[2] = wpabuf_head(wps->dh_pubkey_e); 2127 len[2] = wpabuf_len(wps->dh_pubkey_e); 2128 addr[3] = wpabuf_head(wps->dh_pubkey_r); 2129 len[3] = wpabuf_len(wps->dh_pubkey_r); 2130 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 2131 2132 if (os_memcmp(wps->peer_hash1, hash, WPS_HASH_LEN) != 0) { 2133 wpa_printf(MSG_DEBUG, "WPS: E-Hash1 derived from E-S1 does " 2134 "not match with the pre-committed value"); 2135 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE; 2136 wps_pwd_auth_fail_event(wps->wps, 0, 1); 2137 return -1; 2138 } 2139 2140 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the first " 2141 "half of the device password"); 2142 2143 return 0; 2144} 2145 2146 2147static int wps_process_e_snonce2(struct wps_data *wps, const u8 *e_snonce2) 2148{ 2149 u8 hash[SHA256_MAC_LEN]; 2150 const u8 *addr[4]; 2151 size_t len[4]; 2152 2153 if (e_snonce2 == NULL) { 2154 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce2 received"); 2155 return -1; 2156 } 2157 2158 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce2", e_snonce2, 2159 WPS_SECRET_NONCE_LEN); 2160 2161 /* E-Hash2 = HMAC_AuthKey(E-S2 || PSK2 || PK_E || PK_R) */ 2162 addr[0] = e_snonce2; 2163 len[0] = WPS_SECRET_NONCE_LEN; 2164 addr[1] = wps->psk2; 2165 len[1] = WPS_PSK_LEN; 2166 addr[2] = wpabuf_head(wps->dh_pubkey_e); 2167 len[2] = wpabuf_len(wps->dh_pubkey_e); 2168 addr[3] = wpabuf_head(wps->dh_pubkey_r); 2169 len[3] = wpabuf_len(wps->dh_pubkey_r); 2170 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 2171 2172 if (os_memcmp(wps->peer_hash2, hash, WPS_HASH_LEN) != 0) { 2173 wpa_printf(MSG_DEBUG, "WPS: E-Hash2 derived from E-S2 does " 2174 "not match with the pre-committed value"); 2175 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e); 2176 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE; 2177 wps_pwd_auth_fail_event(wps->wps, 0, 2); 2178 return -1; 2179 } 2180 2181 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the second " 2182 "half of the device password"); 2183 wps->wps_pin_revealed = 0; 2184 wps_registrar_unlock_pin(wps->wps->registrar, wps->uuid_e); 2185 2186 /* 2187 * In case wildcard PIN is used and WPS handshake succeeds in the first 2188 * attempt, wps_registrar_unlock_pin() would not free the PIN, so make 2189 * sure the PIN gets invalidated here. 2190 */ 2191 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e); 2192 2193 return 0; 2194} 2195 2196 2197static int wps_process_mac_addr(struct wps_data *wps, const u8 *mac_addr) 2198{ 2199 if (mac_addr == NULL) { 2200 wpa_printf(MSG_DEBUG, "WPS: No MAC Address received"); 2201 return -1; 2202 } 2203 2204 wpa_printf(MSG_DEBUG, "WPS: Enrollee MAC Address " MACSTR, 2205 MAC2STR(mac_addr)); 2206 os_memcpy(wps->mac_addr_e, mac_addr, ETH_ALEN); 2207 os_memcpy(wps->peer_dev.mac_addr, mac_addr, ETH_ALEN); 2208 2209 return 0; 2210} 2211 2212 2213static int wps_process_pubkey(struct wps_data *wps, const u8 *pk, 2214 size_t pk_len) 2215{ 2216 if (pk == NULL || pk_len == 0) { 2217 wpa_printf(MSG_DEBUG, "WPS: No Public Key received"); 2218 return -1; 2219 } 2220 2221#ifdef CONFIG_WPS_OOB 2222 if (wps->wps->oob_conf.pubkey_hash != NULL) { 2223 const u8 *addr[1]; 2224 u8 hash[WPS_HASH_LEN]; 2225 2226 addr[0] = pk; 2227 sha256_vector(1, addr, &pk_len, hash); 2228 if (os_memcmp(hash, 2229 wpabuf_head(wps->wps->oob_conf.pubkey_hash), 2230 WPS_OOB_PUBKEY_HASH_LEN) != 0) { 2231 wpa_printf(MSG_ERROR, "WPS: Public Key hash error"); 2232 return -1; 2233 } 2234 } 2235#endif /* CONFIG_WPS_OOB */ 2236 2237 wpabuf_free(wps->dh_pubkey_e); 2238 wps->dh_pubkey_e = wpabuf_alloc_copy(pk, pk_len); 2239 if (wps->dh_pubkey_e == NULL) 2240 return -1; 2241 2242 return 0; 2243} 2244 2245 2246static int wps_process_auth_type_flags(struct wps_data *wps, const u8 *auth) 2247{ 2248 u16 auth_types; 2249 2250 if (auth == NULL) { 2251 wpa_printf(MSG_DEBUG, "WPS: No Authentication Type flags " 2252 "received"); 2253 return -1; 2254 } 2255 2256 auth_types = WPA_GET_BE16(auth); 2257 2258 wpa_printf(MSG_DEBUG, "WPS: Enrollee Authentication Type flags 0x%x", 2259 auth_types); 2260 wps->auth_type = wps->wps->auth_types & auth_types; 2261 if (wps->auth_type == 0) { 2262 wpa_printf(MSG_DEBUG, "WPS: No match in supported " 2263 "authentication types (own 0x%x Enrollee 0x%x)", 2264 wps->wps->auth_types, auth_types); 2265#ifdef WPS_WORKAROUNDS 2266 /* 2267 * Some deployed implementations seem to advertise incorrect 2268 * information in this attribute. For example, Linksys WRT350N 2269 * seems to have a byteorder bug that breaks this negotiation. 2270 * In order to interoperate with existing implementations, 2271 * assume that the Enrollee supports everything we do. 2272 */ 2273 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee " 2274 "does not advertise supported authentication types " 2275 "correctly"); 2276 wps->auth_type = wps->wps->auth_types; 2277#else /* WPS_WORKAROUNDS */ 2278 return -1; 2279#endif /* WPS_WORKAROUNDS */ 2280 } 2281 2282 return 0; 2283} 2284 2285 2286static int wps_process_encr_type_flags(struct wps_data *wps, const u8 *encr) 2287{ 2288 u16 encr_types; 2289 2290 if (encr == NULL) { 2291 wpa_printf(MSG_DEBUG, "WPS: No Encryption Type flags " 2292 "received"); 2293 return -1; 2294 } 2295 2296 encr_types = WPA_GET_BE16(encr); 2297 2298 wpa_printf(MSG_DEBUG, "WPS: Enrollee Encryption Type flags 0x%x", 2299 encr_types); 2300 wps->encr_type = wps->wps->encr_types & encr_types; 2301 if (wps->encr_type == 0) { 2302 wpa_printf(MSG_DEBUG, "WPS: No match in supported " 2303 "encryption types (own 0x%x Enrollee 0x%x)", 2304 wps->wps->encr_types, encr_types); 2305#ifdef WPS_WORKAROUNDS 2306 /* 2307 * Some deployed implementations seem to advertise incorrect 2308 * information in this attribute. For example, Linksys WRT350N 2309 * seems to have a byteorder bug that breaks this negotiation. 2310 * In order to interoperate with existing implementations, 2311 * assume that the Enrollee supports everything we do. 2312 */ 2313 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee " 2314 "does not advertise supported encryption types " 2315 "correctly"); 2316 wps->encr_type = wps->wps->encr_types; 2317#else /* WPS_WORKAROUNDS */ 2318 return -1; 2319#endif /* WPS_WORKAROUNDS */ 2320 } 2321 2322 return 0; 2323} 2324 2325 2326static int wps_process_conn_type_flags(struct wps_data *wps, const u8 *conn) 2327{ 2328 if (conn == NULL) { 2329 wpa_printf(MSG_DEBUG, "WPS: No Connection Type flags " 2330 "received"); 2331 return -1; 2332 } 2333 2334 wpa_printf(MSG_DEBUG, "WPS: Enrollee Connection Type flags 0x%x", 2335 *conn); 2336 2337 return 0; 2338} 2339 2340 2341static int wps_process_config_methods(struct wps_data *wps, const u8 *methods) 2342{ 2343 u16 m; 2344 2345 if (methods == NULL) { 2346 wpa_printf(MSG_DEBUG, "WPS: No Config Methods received"); 2347 return -1; 2348 } 2349 2350 m = WPA_GET_BE16(methods); 2351 2352 wpa_printf(MSG_DEBUG, "WPS: Enrollee Config Methods 0x%x" 2353 "%s%s%s%s%s%s%s%s%s", m, 2354 m & WPS_CONFIG_USBA ? " [USBA]" : "", 2355 m & WPS_CONFIG_ETHERNET ? " [Ethernet]" : "", 2356 m & WPS_CONFIG_LABEL ? " [Label]" : "", 2357 m & WPS_CONFIG_DISPLAY ? " [Display]" : "", 2358 m & WPS_CONFIG_EXT_NFC_TOKEN ? " [Ext NFC Token]" : "", 2359 m & WPS_CONFIG_INT_NFC_TOKEN ? " [Int NFC Token]" : "", 2360 m & WPS_CONFIG_NFC_INTERFACE ? " [NFC]" : "", 2361 m & WPS_CONFIG_PUSHBUTTON ? " [PBC]" : "", 2362 m & WPS_CONFIG_KEYPAD ? " [Keypad]" : ""); 2363 2364 if (!(m & WPS_CONFIG_DISPLAY) && !wps->use_psk_key) { 2365 /* 2366 * The Enrollee does not have a display so it is unlikely to be 2367 * able to show the passphrase to a user and as such, could 2368 * benefit from receiving PSK to reduce key derivation time. 2369 */ 2370 wpa_printf(MSG_DEBUG, "WPS: Prefer PSK format key due to " 2371 "Enrollee not supporting display"); 2372 wps->use_psk_key = 1; 2373 } 2374 2375 return 0; 2376} 2377 2378 2379static int wps_process_wps_state(struct wps_data *wps, const u8 *state) 2380{ 2381 if (state == NULL) { 2382 wpa_printf(MSG_DEBUG, "WPS: No Wi-Fi Protected Setup State " 2383 "received"); 2384 return -1; 2385 } 2386 2387 wpa_printf(MSG_DEBUG, "WPS: Enrollee Wi-Fi Protected Setup State %d", 2388 *state); 2389 2390 return 0; 2391} 2392 2393 2394static int wps_process_assoc_state(struct wps_data *wps, const u8 *assoc) 2395{ 2396 u16 a; 2397 2398 if (assoc == NULL) { 2399 wpa_printf(MSG_DEBUG, "WPS: No Association State received"); 2400 return -1; 2401 } 2402 2403 a = WPA_GET_BE16(assoc); 2404 wpa_printf(MSG_DEBUG, "WPS: Enrollee Association State %d", a); 2405 2406 return 0; 2407} 2408 2409 2410static int wps_process_config_error(struct wps_data *wps, const u8 *err) 2411{ 2412 u16 e; 2413 2414 if (err == NULL) { 2415 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error received"); 2416 return -1; 2417 } 2418 2419 e = WPA_GET_BE16(err); 2420 wpa_printf(MSG_DEBUG, "WPS: Enrollee Configuration Error %d", e); 2421 2422 return 0; 2423} 2424 2425 2426static int wps_registrar_p2p_dev_addr_match(struct wps_data *wps) 2427{ 2428#ifdef CONFIG_P2P 2429 struct wps_registrar *reg = wps->wps->registrar; 2430 2431 if (is_zero_ether_addr(reg->p2p_dev_addr)) 2432 return 1; /* no filtering in use */ 2433 2434 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) != 0) { 2435 wpa_printf(MSG_DEBUG, "WPS: No match on P2P Device Address " 2436 "filtering for PBC: expected " MACSTR " was " 2437 MACSTR " - indicate PBC session overlap", 2438 MAC2STR(reg->p2p_dev_addr), 2439 MAC2STR(wps->p2p_dev_addr)); 2440 return 0; 2441 } 2442#endif /* CONFIG_P2P */ 2443 return 1; 2444} 2445 2446 2447static int wps_registrar_skip_overlap(struct wps_data *wps) 2448{ 2449#ifdef CONFIG_P2P 2450 struct wps_registrar *reg = wps->wps->registrar; 2451 2452 if (is_zero_ether_addr(reg->p2p_dev_addr)) 2453 return 0; /* no specific Enrollee selected */ 2454 2455 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) == 0) { 2456 wpa_printf(MSG_DEBUG, "WPS: Skip PBC overlap due to selected " 2457 "Enrollee match"); 2458 return 1; 2459 } 2460#endif /* CONFIG_P2P */ 2461 return 0; 2462} 2463 2464 2465static enum wps_process_res wps_process_m1(struct wps_data *wps, 2466 struct wps_parse_attr *attr) 2467{ 2468 wpa_printf(MSG_DEBUG, "WPS: Received M1"); 2469 2470 if (wps->state != RECV_M1) { 2471 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2472 "receiving M1", wps->state); 2473 return WPS_FAILURE; 2474 } 2475 2476 if (wps_process_uuid_e(wps, attr->uuid_e) || 2477 wps_process_mac_addr(wps, attr->mac_addr) || 2478 wps_process_enrollee_nonce(wps, attr->enrollee_nonce) || 2479 wps_process_pubkey(wps, attr->public_key, attr->public_key_len) || 2480 wps_process_auth_type_flags(wps, attr->auth_type_flags) || 2481 wps_process_encr_type_flags(wps, attr->encr_type_flags) || 2482 wps_process_conn_type_flags(wps, attr->conn_type_flags) || 2483 wps_process_config_methods(wps, attr->config_methods) || 2484 wps_process_wps_state(wps, attr->wps_state) || 2485 wps_process_device_attrs(&wps->peer_dev, attr) || 2486 wps_process_rf_bands(&wps->peer_dev, attr->rf_bands) || 2487 wps_process_assoc_state(wps, attr->assoc_state) || 2488 wps_process_dev_password_id(wps, attr->dev_password_id) || 2489 wps_process_config_error(wps, attr->config_error) || 2490 wps_process_os_version(&wps->peer_dev, attr->os_version)) 2491 return WPS_FAILURE; 2492 2493 if (wps->dev_pw_id < 0x10 && 2494 wps->dev_pw_id != DEV_PW_DEFAULT && 2495 wps->dev_pw_id != DEV_PW_USER_SPECIFIED && 2496 wps->dev_pw_id != DEV_PW_MACHINE_SPECIFIED && 2497 wps->dev_pw_id != DEV_PW_REGISTRAR_SPECIFIED && 2498 (wps->dev_pw_id != DEV_PW_PUSHBUTTON || 2499 !wps->wps->registrar->pbc)) { 2500 wpa_printf(MSG_DEBUG, "WPS: Unsupported Device Password ID %d", 2501 wps->dev_pw_id); 2502 wps->state = SEND_M2D; 2503 return WPS_CONTINUE; 2504 } 2505 2506#ifdef CONFIG_WPS_NFC 2507 if (wps->dev_pw_id >= 0x10) { 2508 struct wps_nfc_pw_token *token; 2509 const u8 *addr[1]; 2510 u8 hash[WPS_HASH_LEN]; 2511 2512 token = wps_get_nfc_pw_token( 2513 &wps->wps->registrar->nfc_pw_tokens, wps->dev_pw_id); 2514 if (token) { 2515 wpa_printf(MSG_DEBUG, "WPS: Found matching NFC " 2516 "Password Token"); 2517 dl_list_del(&token->list); 2518 wps->nfc_pw_token = token; 2519 2520 addr[0] = attr->public_key; 2521 sha256_vector(1, addr, &attr->public_key_len, hash); 2522 if (os_memcmp(hash, wps->nfc_pw_token->pubkey_hash, 2523 WPS_OOB_PUBKEY_HASH_LEN) != 0) { 2524 wpa_printf(MSG_ERROR, "WPS: Public Key hash " 2525 "mismatch"); 2526 return WPS_FAILURE; 2527 } 2528 } 2529 } 2530#endif /* CONFIG_WPS_NFC */ 2531 2532#ifdef CONFIG_WPS_OOB 2533 if (wps->dev_pw_id >= 0x10 && wps->nfc_pw_token == NULL && 2534 wps->dev_pw_id != wps->wps->oob_dev_pw_id) { 2535 wpa_printf(MSG_DEBUG, "WPS: OOB Device Password ID " 2536 "%d mismatch", wps->dev_pw_id); 2537 wps->state = SEND_M2D; 2538 return WPS_CONTINUE; 2539 } 2540#endif /* CONFIG_WPS_OOB */ 2541 2542 if (wps->dev_pw_id == DEV_PW_PUSHBUTTON) { 2543 if ((wps->wps->registrar->force_pbc_overlap || 2544 wps_registrar_pbc_overlap(wps->wps->registrar, 2545 wps->mac_addr_e, wps->uuid_e) || 2546 !wps_registrar_p2p_dev_addr_match(wps)) && 2547 !wps_registrar_skip_overlap(wps)) { 2548 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - deny PBC " 2549 "negotiation"); 2550 wps->state = SEND_M2D; 2551 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2552 wps_pbc_overlap_event(wps->wps); 2553 wps_fail_event(wps->wps, WPS_M1, 2554 WPS_CFG_MULTIPLE_PBC_DETECTED, 2555 WPS_EI_NO_ERROR); 2556 wps->wps->registrar->force_pbc_overlap = 1; 2557 return WPS_CONTINUE; 2558 } 2559 wps_registrar_add_pbc_session(wps->wps->registrar, 2560 wps->mac_addr_e, wps->uuid_e); 2561 wps->pbc = 1; 2562 } 2563 2564#ifdef WPS_WORKAROUNDS 2565 /* 2566 * It looks like Mac OS X 10.6.3 and 10.6.4 do not like Network Key in 2567 * passphrase format. To avoid interop issues, force PSK format to be 2568 * used. 2569 */ 2570 if (!wps->use_psk_key && 2571 wps->peer_dev.manufacturer && 2572 os_strncmp(wps->peer_dev.manufacturer, "Apple ", 6) == 0 && 2573 wps->peer_dev.model_name && 2574 os_strcmp(wps->peer_dev.model_name, "AirPort") == 0) { 2575 wpa_printf(MSG_DEBUG, "WPS: Workaround - Force Network Key in " 2576 "PSK format"); 2577 wps->use_psk_key = 1; 2578 } 2579#endif /* WPS_WORKAROUNDS */ 2580 2581 wps->state = SEND_M2; 2582 return WPS_CONTINUE; 2583} 2584 2585 2586static enum wps_process_res wps_process_m3(struct wps_data *wps, 2587 const struct wpabuf *msg, 2588 struct wps_parse_attr *attr) 2589{ 2590 wpa_printf(MSG_DEBUG, "WPS: Received M3"); 2591 2592 if (wps->state != RECV_M3) { 2593 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2594 "receiving M3", wps->state); 2595 wps->state = SEND_WSC_NACK; 2596 return WPS_CONTINUE; 2597 } 2598 2599 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2600 !wps_registrar_skip_overlap(wps)) { 2601 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2602 "session overlap"); 2603 wps->state = SEND_WSC_NACK; 2604 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2605 return WPS_CONTINUE; 2606 } 2607 2608 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2609 wps_process_authenticator(wps, attr->authenticator, msg) || 2610 wps_process_e_hash1(wps, attr->e_hash1) || 2611 wps_process_e_hash2(wps, attr->e_hash2)) { 2612 wps->state = SEND_WSC_NACK; 2613 return WPS_CONTINUE; 2614 } 2615 2616 wps->state = SEND_M4; 2617 return WPS_CONTINUE; 2618} 2619 2620 2621static enum wps_process_res wps_process_m5(struct wps_data *wps, 2622 const struct wpabuf *msg, 2623 struct wps_parse_attr *attr) 2624{ 2625 struct wpabuf *decrypted; 2626 struct wps_parse_attr eattr; 2627 2628 wpa_printf(MSG_DEBUG, "WPS: Received M5"); 2629 2630 if (wps->state != RECV_M5) { 2631 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2632 "receiving M5", wps->state); 2633 wps->state = SEND_WSC_NACK; 2634 return WPS_CONTINUE; 2635 } 2636 2637 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2638 !wps_registrar_skip_overlap(wps)) { 2639 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2640 "session overlap"); 2641 wps->state = SEND_WSC_NACK; 2642 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2643 return WPS_CONTINUE; 2644 } 2645 2646 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2647 wps_process_authenticator(wps, attr->authenticator, msg)) { 2648 wps->state = SEND_WSC_NACK; 2649 return WPS_CONTINUE; 2650 } 2651 2652 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings, 2653 attr->encr_settings_len); 2654 if (decrypted == NULL) { 2655 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted " 2656 "Settings attribute"); 2657 wps->state = SEND_WSC_NACK; 2658 return WPS_CONTINUE; 2659 } 2660 2661 if (wps_validate_m5_encr(decrypted, attr->version2 != NULL) < 0) { 2662 wpabuf_free(decrypted); 2663 wps->state = SEND_WSC_NACK; 2664 return WPS_CONTINUE; 2665 } 2666 2667 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings " 2668 "attribute"); 2669 if (wps_parse_msg(decrypted, &eattr) < 0 || 2670 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) || 2671 wps_process_e_snonce1(wps, eattr.e_snonce1)) { 2672 wpabuf_free(decrypted); 2673 wps->state = SEND_WSC_NACK; 2674 return WPS_CONTINUE; 2675 } 2676 wpabuf_free(decrypted); 2677 2678 wps->state = SEND_M6; 2679 return WPS_CONTINUE; 2680} 2681 2682 2683static void wps_sta_cred_cb(struct wps_data *wps) 2684{ 2685 /* 2686 * Update credential to only include a single authentication and 2687 * encryption type in case the AP configuration includes more than one 2688 * option. 2689 */ 2690 if (wps->cred.auth_type & WPS_AUTH_WPA2PSK) 2691 wps->cred.auth_type = WPS_AUTH_WPA2PSK; 2692 else if (wps->cred.auth_type & WPS_AUTH_WPAPSK) 2693 wps->cred.auth_type = WPS_AUTH_WPAPSK; 2694 if (wps->cred.encr_type & WPS_ENCR_AES) 2695 wps->cred.encr_type = WPS_ENCR_AES; 2696 else if (wps->cred.encr_type & WPS_ENCR_TKIP) 2697 wps->cred.encr_type = WPS_ENCR_TKIP; 2698 wpa_printf(MSG_DEBUG, "WPS: Update local configuration based on the " 2699 "AP configuration"); 2700 if (wps->wps->cred_cb) 2701 wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred); 2702} 2703 2704 2705static void wps_cred_update(struct wps_credential *dst, 2706 struct wps_credential *src) 2707{ 2708 os_memcpy(dst->ssid, src->ssid, sizeof(dst->ssid)); 2709 dst->ssid_len = src->ssid_len; 2710 dst->auth_type = src->auth_type; 2711 dst->encr_type = src->encr_type; 2712 dst->key_idx = src->key_idx; 2713 os_memcpy(dst->key, src->key, sizeof(dst->key)); 2714 dst->key_len = src->key_len; 2715} 2716 2717 2718static int wps_process_ap_settings_r(struct wps_data *wps, 2719 struct wps_parse_attr *attr) 2720{ 2721 struct wpabuf *msg; 2722 2723 if (wps->wps->ap || wps->er) 2724 return 0; 2725 2726 /* AP Settings Attributes in M7 when Enrollee is an AP */ 2727 if (wps_process_ap_settings(attr, &wps->cred) < 0) 2728 return -1; 2729 2730 wpa_printf(MSG_INFO, "WPS: Received old AP configuration from AP"); 2731 2732 if (wps->new_ap_settings) { 2733 wpa_printf(MSG_INFO, "WPS: Update AP configuration based on " 2734 "new settings"); 2735 wps_cred_update(&wps->cred, wps->new_ap_settings); 2736 return 0; 2737 } else { 2738 /* 2739 * Use the AP PIN only to receive the current AP settings, not 2740 * to reconfigure the AP. 2741 */ 2742 2743 /* 2744 * Clear selected registrar here since we do not get to 2745 * WSC_Done in this protocol run. 2746 */ 2747 wps_registrar_pin_completed(wps->wps->registrar); 2748 2749 msg = wps_build_ap_cred(wps); 2750 if (msg == NULL) 2751 return -1; 2752 wps->cred.cred_attr = wpabuf_head(msg); 2753 wps->cred.cred_attr_len = wpabuf_len(msg); 2754 2755 if (wps->ap_settings_cb) { 2756 wps->ap_settings_cb(wps->ap_settings_cb_ctx, 2757 &wps->cred); 2758 wpabuf_free(msg); 2759 return 1; 2760 } 2761 wps_sta_cred_cb(wps); 2762 2763 wps->cred.cred_attr = NULL; 2764 wps->cred.cred_attr_len = 0; 2765 wpabuf_free(msg); 2766 2767 return 1; 2768 } 2769} 2770 2771 2772static enum wps_process_res wps_process_m7(struct wps_data *wps, 2773 const struct wpabuf *msg, 2774 struct wps_parse_attr *attr) 2775{ 2776 struct wpabuf *decrypted; 2777 struct wps_parse_attr eattr; 2778 2779 wpa_printf(MSG_DEBUG, "WPS: Received M7"); 2780 2781 if (wps->state != RECV_M7) { 2782 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2783 "receiving M7", wps->state); 2784 wps->state = SEND_WSC_NACK; 2785 return WPS_CONTINUE; 2786 } 2787 2788 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2789 !wps_registrar_skip_overlap(wps)) { 2790 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2791 "session overlap"); 2792 wps->state = SEND_WSC_NACK; 2793 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2794 return WPS_CONTINUE; 2795 } 2796 2797 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2798 wps_process_authenticator(wps, attr->authenticator, msg)) { 2799 wps->state = SEND_WSC_NACK; 2800 return WPS_CONTINUE; 2801 } 2802 2803 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings, 2804 attr->encr_settings_len); 2805 if (decrypted == NULL) { 2806 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypt Encrypted " 2807 "Settings attribute"); 2808 wps->state = SEND_WSC_NACK; 2809 return WPS_CONTINUE; 2810 } 2811 2812 if (wps_validate_m7_encr(decrypted, wps->wps->ap || wps->er, 2813 attr->version2 != NULL) < 0) { 2814 wpabuf_free(decrypted); 2815 wps->state = SEND_WSC_NACK; 2816 return WPS_CONTINUE; 2817 } 2818 2819 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings " 2820 "attribute"); 2821 if (wps_parse_msg(decrypted, &eattr) < 0 || 2822 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) || 2823 wps_process_e_snonce2(wps, eattr.e_snonce2) || 2824 wps_process_ap_settings_r(wps, &eattr)) { 2825 wpabuf_free(decrypted); 2826 wps->state = SEND_WSC_NACK; 2827 return WPS_CONTINUE; 2828 } 2829 2830 wpabuf_free(decrypted); 2831 2832 wps->state = SEND_M8; 2833 return WPS_CONTINUE; 2834} 2835 2836 2837static enum wps_process_res wps_process_wsc_msg(struct wps_data *wps, 2838 const struct wpabuf *msg) 2839{ 2840 struct wps_parse_attr attr; 2841 enum wps_process_res ret = WPS_CONTINUE; 2842 2843 wpa_printf(MSG_DEBUG, "WPS: Received WSC_MSG"); 2844 2845 if (wps_parse_msg(msg, &attr) < 0) 2846 return WPS_FAILURE; 2847 2848 if (attr.msg_type == NULL) { 2849 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 2850 wps->state = SEND_WSC_NACK; 2851 return WPS_CONTINUE; 2852 } 2853 2854 if (*attr.msg_type != WPS_M1 && 2855 (attr.registrar_nonce == NULL || 2856 os_memcmp(wps->nonce_r, attr.registrar_nonce, 2857 WPS_NONCE_LEN) != 0)) { 2858 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 2859 return WPS_FAILURE; 2860 } 2861 2862 switch (*attr.msg_type) { 2863 case WPS_M1: 2864 if (wps_validate_m1(msg) < 0) 2865 return WPS_FAILURE; 2866#ifdef CONFIG_WPS_UPNP 2867 if (wps->wps->wps_upnp && attr.mac_addr) { 2868 /* Remove old pending messages when starting new run */ 2869 wps_free_pending_msgs(wps->wps->upnp_msgs); 2870 wps->wps->upnp_msgs = NULL; 2871 2872 upnp_wps_device_send_wlan_event( 2873 wps->wps->wps_upnp, attr.mac_addr, 2874 UPNP_WPS_WLANEVENT_TYPE_EAP, msg); 2875 } 2876#endif /* CONFIG_WPS_UPNP */ 2877 ret = wps_process_m1(wps, &attr); 2878 break; 2879 case WPS_M3: 2880 if (wps_validate_m3(msg) < 0) 2881 return WPS_FAILURE; 2882 ret = wps_process_m3(wps, msg, &attr); 2883 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 2884 wps_fail_event(wps->wps, WPS_M3, wps->config_error, 2885 wps->error_indication); 2886 break; 2887 case WPS_M5: 2888 if (wps_validate_m5(msg) < 0) 2889 return WPS_FAILURE; 2890 ret = wps_process_m5(wps, msg, &attr); 2891 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 2892 wps_fail_event(wps->wps, WPS_M5, wps->config_error, 2893 wps->error_indication); 2894 break; 2895 case WPS_M7: 2896 if (wps_validate_m7(msg) < 0) 2897 return WPS_FAILURE; 2898 ret = wps_process_m7(wps, msg, &attr); 2899 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 2900 wps_fail_event(wps->wps, WPS_M7, wps->config_error, 2901 wps->error_indication); 2902 break; 2903 default: 2904 wpa_printf(MSG_DEBUG, "WPS: Unsupported Message Type %d", 2905 *attr.msg_type); 2906 return WPS_FAILURE; 2907 } 2908 2909 if (ret == WPS_CONTINUE) { 2910 /* Save a copy of the last message for Authenticator derivation 2911 */ 2912 wpabuf_free(wps->last_msg); 2913 wps->last_msg = wpabuf_dup(msg); 2914 } 2915 2916 return ret; 2917} 2918 2919 2920static enum wps_process_res wps_process_wsc_ack(struct wps_data *wps, 2921 const struct wpabuf *msg) 2922{ 2923 struct wps_parse_attr attr; 2924 2925 wpa_printf(MSG_DEBUG, "WPS: Received WSC_ACK"); 2926 2927 if (wps_parse_msg(msg, &attr) < 0) 2928 return WPS_FAILURE; 2929 2930 if (attr.msg_type == NULL) { 2931 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 2932 return WPS_FAILURE; 2933 } 2934 2935 if (*attr.msg_type != WPS_WSC_ACK) { 2936 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 2937 *attr.msg_type); 2938 return WPS_FAILURE; 2939 } 2940 2941#ifdef CONFIG_WPS_UPNP 2942 if (wps->wps->wps_upnp && wps->ext_reg && wps->state == RECV_M2D_ACK && 2943 upnp_wps_subscribers(wps->wps->wps_upnp)) { 2944 if (wps->wps->upnp_msgs) 2945 return WPS_CONTINUE; 2946 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an " 2947 "external Registrar"); 2948 return WPS_PENDING; 2949 } 2950#endif /* CONFIG_WPS_UPNP */ 2951 2952 if (attr.registrar_nonce == NULL || 2953 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 2954 { 2955 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 2956 return WPS_FAILURE; 2957 } 2958 2959 if (attr.enrollee_nonce == NULL || 2960 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 2961 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 2962 return WPS_FAILURE; 2963 } 2964 2965 if (wps->state == RECV_M2D_ACK) { 2966#ifdef CONFIG_WPS_UPNP 2967 if (wps->wps->wps_upnp && 2968 upnp_wps_subscribers(wps->wps->wps_upnp)) { 2969 if (wps->wps->upnp_msgs) 2970 return WPS_CONTINUE; 2971 if (wps->ext_reg == 0) 2972 wps->ext_reg = 1; 2973 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an " 2974 "external Registrar"); 2975 return WPS_PENDING; 2976 } 2977#endif /* CONFIG_WPS_UPNP */ 2978 2979 wpa_printf(MSG_DEBUG, "WPS: No more registrars available - " 2980 "terminate negotiation"); 2981 } 2982 2983 return WPS_FAILURE; 2984} 2985 2986 2987static enum wps_process_res wps_process_wsc_nack(struct wps_data *wps, 2988 const struct wpabuf *msg) 2989{ 2990 struct wps_parse_attr attr; 2991 int old_state; 2992 u16 config_error; 2993 2994 wpa_printf(MSG_DEBUG, "WPS: Received WSC_NACK"); 2995 2996 old_state = wps->state; 2997 wps->state = SEND_WSC_NACK; 2998 2999 if (wps_parse_msg(msg, &attr) < 0) 3000 return WPS_FAILURE; 3001 3002 if (attr.msg_type == NULL) { 3003 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3004 return WPS_FAILURE; 3005 } 3006 3007 if (*attr.msg_type != WPS_WSC_NACK) { 3008 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 3009 *attr.msg_type); 3010 return WPS_FAILURE; 3011 } 3012 3013#ifdef CONFIG_WPS_UPNP 3014 if (wps->wps->wps_upnp && wps->ext_reg) { 3015 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external " 3016 "Registrar terminated by the Enrollee"); 3017 return WPS_FAILURE; 3018 } 3019#endif /* CONFIG_WPS_UPNP */ 3020 3021 if (attr.registrar_nonce == NULL || 3022 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 3023 { 3024 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3025 return WPS_FAILURE; 3026 } 3027 3028 if (attr.enrollee_nonce == NULL || 3029 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 3030 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 3031 return WPS_FAILURE; 3032 } 3033 3034 if (attr.config_error == NULL) { 3035 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error attribute " 3036 "in WSC_NACK"); 3037 return WPS_FAILURE; 3038 } 3039 3040 config_error = WPA_GET_BE16(attr.config_error); 3041 wpa_printf(MSG_DEBUG, "WPS: Enrollee terminated negotiation with " 3042 "Configuration Error %d", config_error); 3043 3044 switch (old_state) { 3045 case RECV_M3: 3046 wps_fail_event(wps->wps, WPS_M2, config_error, 3047 wps->error_indication); 3048 break; 3049 case RECV_M5: 3050 wps_fail_event(wps->wps, WPS_M4, config_error, 3051 wps->error_indication); 3052 break; 3053 case RECV_M7: 3054 wps_fail_event(wps->wps, WPS_M6, config_error, 3055 wps->error_indication); 3056 break; 3057 case RECV_DONE: 3058 wps_fail_event(wps->wps, WPS_M8, config_error, 3059 wps->error_indication); 3060 break; 3061 default: 3062 break; 3063 } 3064 3065 return WPS_FAILURE; 3066} 3067 3068 3069static enum wps_process_res wps_process_wsc_done(struct wps_data *wps, 3070 const struct wpabuf *msg) 3071{ 3072 struct wps_parse_attr attr; 3073 3074 wpa_printf(MSG_DEBUG, "WPS: Received WSC_Done"); 3075 3076 if (wps->state != RECV_DONE && 3077 (!wps->wps->wps_upnp || !wps->ext_reg)) { 3078 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 3079 "receiving WSC_Done", wps->state); 3080 return WPS_FAILURE; 3081 } 3082 3083 if (wps_parse_msg(msg, &attr) < 0) 3084 return WPS_FAILURE; 3085 3086 if (attr.msg_type == NULL) { 3087 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3088 return WPS_FAILURE; 3089 } 3090 3091 if (*attr.msg_type != WPS_WSC_DONE) { 3092 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 3093 *attr.msg_type); 3094 return WPS_FAILURE; 3095 } 3096 3097#ifdef CONFIG_WPS_UPNP 3098 if (wps->wps->wps_upnp && wps->ext_reg) { 3099 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external " 3100 "Registrar completed successfully"); 3101 wps_device_store(wps->wps->registrar, &wps->peer_dev, 3102 wps->uuid_e); 3103 return WPS_DONE; 3104 } 3105#endif /* CONFIG_WPS_UPNP */ 3106 3107 if (attr.registrar_nonce == NULL || 3108 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 3109 { 3110 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3111 return WPS_FAILURE; 3112 } 3113 3114 if (attr.enrollee_nonce == NULL || 3115 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 3116 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 3117 return WPS_FAILURE; 3118 } 3119 3120 wpa_printf(MSG_DEBUG, "WPS: Negotiation completed successfully"); 3121 wps_device_store(wps->wps->registrar, &wps->peer_dev, 3122 wps->uuid_e); 3123 3124 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->new_psk && 3125 wps->wps->ap && !wps->wps->registrar->disable_auto_conf) { 3126 struct wps_credential cred; 3127 3128 wpa_printf(MSG_DEBUG, "WPS: Moving to Configured state based " 3129 "on first Enrollee connection"); 3130 3131 os_memset(&cred, 0, sizeof(cred)); 3132 os_memcpy(cred.ssid, wps->wps->ssid, wps->wps->ssid_len); 3133 cred.ssid_len = wps->wps->ssid_len; 3134 cred.auth_type = WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK; 3135 cred.encr_type = WPS_ENCR_TKIP | WPS_ENCR_AES; 3136 os_memcpy(cred.key, wps->new_psk, wps->new_psk_len); 3137 cred.key_len = wps->new_psk_len; 3138 3139 wps->wps->wps_state = WPS_STATE_CONFIGURED; 3140 wpa_hexdump_ascii_key(MSG_DEBUG, 3141 "WPS: Generated random passphrase", 3142 wps->new_psk, wps->new_psk_len); 3143 if (wps->wps->cred_cb) 3144 wps->wps->cred_cb(wps->wps->cb_ctx, &cred); 3145 3146 os_free(wps->new_psk); 3147 wps->new_psk = NULL; 3148 } 3149 3150 if (!wps->wps->ap && !wps->er) 3151 wps_sta_cred_cb(wps); 3152 3153 if (wps->new_psk) { 3154 if (wps_cb_new_psk(wps->wps->registrar, wps->mac_addr_e, 3155 wps->new_psk, wps->new_psk_len)) { 3156 wpa_printf(MSG_DEBUG, "WPS: Failed to configure the " 3157 "new PSK"); 3158 } 3159 os_free(wps->new_psk); 3160 wps->new_psk = NULL; 3161 } 3162 3163 wps_cb_reg_success(wps->wps->registrar, wps->mac_addr_e, wps->uuid_e, 3164 wps->dev_password, wps->dev_password_len); 3165 3166 if (wps->pbc) { 3167 wps_registrar_remove_pbc_session(wps->wps->registrar, 3168 wps->uuid_e, 3169 wps->p2p_dev_addr); 3170 wps_registrar_pbc_completed(wps->wps->registrar); 3171 } else { 3172 wps_registrar_pin_completed(wps->wps->registrar); 3173 } 3174 /* TODO: maintain AuthorizedMACs somewhere separately for each ER and 3175 * merge them into APs own list.. */ 3176 3177 wps_success_event(wps->wps); 3178 3179 return WPS_DONE; 3180} 3181 3182 3183enum wps_process_res wps_registrar_process_msg(struct wps_data *wps, 3184 enum wsc_op_code op_code, 3185 const struct wpabuf *msg) 3186{ 3187 enum wps_process_res ret; 3188 3189 wpa_printf(MSG_DEBUG, "WPS: Processing received message (len=%lu " 3190 "op_code=%d)", 3191 (unsigned long) wpabuf_len(msg), op_code); 3192 3193#ifdef CONFIG_WPS_UPNP 3194 if (wps->wps->wps_upnp && op_code == WSC_MSG && wps->ext_reg == 1) { 3195 struct wps_parse_attr attr; 3196 if (wps_parse_msg(msg, &attr) == 0 && attr.msg_type && 3197 *attr.msg_type == WPS_M3) 3198 wps->ext_reg = 2; /* past M2/M2D phase */ 3199 } 3200 if (wps->ext_reg > 1) 3201 wps_registrar_free_pending_m2(wps->wps); 3202 if (wps->wps->wps_upnp && wps->ext_reg && 3203 wps->wps->upnp_msgs == NULL && 3204 (op_code == WSC_MSG || op_code == WSC_Done || op_code == WSC_NACK)) 3205 { 3206 struct wps_parse_attr attr; 3207 int type; 3208 if (wps_parse_msg(msg, &attr) < 0 || attr.msg_type == NULL) 3209 type = -1; 3210 else 3211 type = *attr.msg_type; 3212 wpa_printf(MSG_DEBUG, "WPS: Sending received message (type %d)" 3213 " to external Registrar for processing", type); 3214 upnp_wps_device_send_wlan_event(wps->wps->wps_upnp, 3215 wps->mac_addr_e, 3216 UPNP_WPS_WLANEVENT_TYPE_EAP, 3217 msg); 3218 if (op_code == WSC_MSG) 3219 return WPS_PENDING; 3220 } else if (wps->wps->wps_upnp && wps->ext_reg && op_code == WSC_MSG) { 3221 wpa_printf(MSG_DEBUG, "WPS: Skip internal processing - using " 3222 "external Registrar"); 3223 return WPS_CONTINUE; 3224 } 3225#endif /* CONFIG_WPS_UPNP */ 3226 3227 switch (op_code) { 3228 case WSC_MSG: 3229 return wps_process_wsc_msg(wps, msg); 3230 case WSC_ACK: 3231 if (wps_validate_wsc_ack(msg) < 0) 3232 return WPS_FAILURE; 3233 return wps_process_wsc_ack(wps, msg); 3234 case WSC_NACK: 3235 if (wps_validate_wsc_nack(msg) < 0) 3236 return WPS_FAILURE; 3237 return wps_process_wsc_nack(wps, msg); 3238 case WSC_Done: 3239 if (wps_validate_wsc_done(msg) < 0) 3240 return WPS_FAILURE; 3241 ret = wps_process_wsc_done(wps, msg); 3242 if (ret == WPS_FAILURE) { 3243 wps->state = SEND_WSC_NACK; 3244 wps_fail_event(wps->wps, WPS_WSC_DONE, 3245 wps->config_error, 3246 wps->error_indication); 3247 } 3248 return ret; 3249 default: 3250 wpa_printf(MSG_DEBUG, "WPS: Unsupported op_code %d", op_code); 3251 return WPS_FAILURE; 3252 } 3253} 3254 3255 3256int wps_registrar_update_ie(struct wps_registrar *reg) 3257{ 3258 return wps_set_ie(reg); 3259} 3260 3261 3262static void wps_registrar_set_selected_timeout(void *eloop_ctx, 3263 void *timeout_ctx) 3264{ 3265 struct wps_registrar *reg = eloop_ctx; 3266 3267 wpa_printf(MSG_DEBUG, "WPS: Selected Registrar timeout - " 3268 "unselect internal Registrar"); 3269 reg->selected_registrar = 0; 3270 reg->pbc = 0; 3271 wps_registrar_selected_registrar_changed(reg); 3272} 3273 3274 3275#ifdef CONFIG_WPS_UPNP 3276static void wps_registrar_sel_reg_add(struct wps_registrar *reg, 3277 struct subscription *s) 3278{ 3279 int i, j; 3280 wpa_printf(MSG_DEBUG, "WPS: External Registrar selected (dev_pw_id=%d " 3281 "config_methods=0x%x)", 3282 s->dev_password_id, s->config_methods); 3283 reg->sel_reg_union = 1; 3284 if (reg->sel_reg_dev_password_id_override != DEV_PW_PUSHBUTTON) 3285 reg->sel_reg_dev_password_id_override = s->dev_password_id; 3286 if (reg->sel_reg_config_methods_override == -1) 3287 reg->sel_reg_config_methods_override = 0; 3288 reg->sel_reg_config_methods_override |= s->config_methods; 3289 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) 3290 if (is_zero_ether_addr(reg->authorized_macs_union[i])) 3291 break; 3292 for (j = 0; i < WPS_MAX_AUTHORIZED_MACS && j < WPS_MAX_AUTHORIZED_MACS; 3293 j++) { 3294 if (is_zero_ether_addr(s->authorized_macs[j])) 3295 break; 3296 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC into union: " 3297 MACSTR, MAC2STR(s->authorized_macs[j])); 3298 os_memcpy(reg->authorized_macs_union[i], 3299 s->authorized_macs[j], ETH_ALEN); 3300 i++; 3301 } 3302 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union", 3303 (u8 *) reg->authorized_macs_union, 3304 sizeof(reg->authorized_macs_union)); 3305} 3306#endif /* CONFIG_WPS_UPNP */ 3307 3308 3309static void wps_registrar_sel_reg_union(struct wps_registrar *reg) 3310{ 3311#ifdef CONFIG_WPS_UPNP 3312 struct subscription *s; 3313 3314 if (reg->wps->wps_upnp == NULL) 3315 return; 3316 3317 dl_list_for_each(s, ®->wps->wps_upnp->subscriptions, 3318 struct subscription, list) { 3319 struct subscr_addr *sa; 3320 sa = dl_list_first(&s->addr_list, struct subscr_addr, list); 3321 if (sa) { 3322 wpa_printf(MSG_DEBUG, "WPS: External Registrar %s:%d", 3323 inet_ntoa(sa->saddr.sin_addr), 3324 ntohs(sa->saddr.sin_port)); 3325 } 3326 if (s->selected_registrar) 3327 wps_registrar_sel_reg_add(reg, s); 3328 else 3329 wpa_printf(MSG_DEBUG, "WPS: External Registrar not " 3330 "selected"); 3331 } 3332#endif /* CONFIG_WPS_UPNP */ 3333} 3334 3335 3336/** 3337 * wps_registrar_selected_registrar_changed - SetSelectedRegistrar change 3338 * @reg: Registrar data from wps_registrar_init() 3339 * 3340 * This function is called when selected registrar state changes, e.g., when an 3341 * AP receives a SetSelectedRegistrar UPnP message. 3342 */ 3343void wps_registrar_selected_registrar_changed(struct wps_registrar *reg) 3344{ 3345 wpa_printf(MSG_DEBUG, "WPS: Selected registrar information changed"); 3346 3347 reg->sel_reg_union = reg->selected_registrar; 3348 reg->sel_reg_dev_password_id_override = -1; 3349 reg->sel_reg_config_methods_override = -1; 3350 os_memcpy(reg->authorized_macs_union, reg->authorized_macs, 3351 WPS_MAX_AUTHORIZED_MACS * ETH_ALEN); 3352 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union (start with own)", 3353 (u8 *) reg->authorized_macs_union, 3354 sizeof(reg->authorized_macs_union)); 3355 if (reg->selected_registrar) { 3356 u16 methods; 3357 3358 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 3359#ifdef CONFIG_WPS2 3360 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 3361 WPS_CONFIG_PHY_PUSHBUTTON); 3362#endif /* CONFIG_WPS2 */ 3363 if (reg->pbc) { 3364 reg->sel_reg_dev_password_id_override = 3365 DEV_PW_PUSHBUTTON; 3366 wps_set_pushbutton(&methods, reg->wps->config_methods); 3367 } 3368 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar selected " 3369 "(pbc=%d)", reg->pbc); 3370 reg->sel_reg_config_methods_override = methods; 3371 } else 3372 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar not selected"); 3373 3374 wps_registrar_sel_reg_union(reg); 3375 3376 wps_set_ie(reg); 3377 wps_cb_set_sel_reg(reg); 3378} 3379 3380 3381int wps_registrar_get_info(struct wps_registrar *reg, const u8 *addr, 3382 char *buf, size_t buflen) 3383{ 3384 struct wps_registrar_device *d; 3385 int len = 0, ret; 3386 char uuid[40]; 3387 char devtype[WPS_DEV_TYPE_BUFSIZE]; 3388 3389 d = wps_device_get(reg, addr); 3390 if (d == NULL) 3391 return 0; 3392 if (uuid_bin2str(d->uuid, uuid, sizeof(uuid))) 3393 return 0; 3394 3395 ret = os_snprintf(buf + len, buflen - len, 3396 "wpsUuid=%s\n" 3397 "wpsPrimaryDeviceType=%s\n" 3398 "wpsDeviceName=%s\n" 3399 "wpsManufacturer=%s\n" 3400 "wpsModelName=%s\n" 3401 "wpsModelNumber=%s\n" 3402 "wpsSerialNumber=%s\n", 3403 uuid, 3404 wps_dev_type_bin2str(d->dev.pri_dev_type, devtype, 3405 sizeof(devtype)), 3406 d->dev.device_name ? d->dev.device_name : "", 3407 d->dev.manufacturer ? d->dev.manufacturer : "", 3408 d->dev.model_name ? d->dev.model_name : "", 3409 d->dev.model_number ? d->dev.model_number : "", 3410 d->dev.serial_number ? d->dev.serial_number : ""); 3411 if (ret < 0 || (size_t) ret >= buflen - len) 3412 return len; 3413 len += ret; 3414 3415 return len; 3416} 3417 3418 3419int wps_registrar_config_ap(struct wps_registrar *reg, 3420 struct wps_credential *cred) 3421{ 3422#ifdef CONFIG_WPS2 3423 printf("encr_type=0x%x\n", cred->encr_type); 3424 if (!(cred->encr_type & (WPS_ENCR_NONE | WPS_ENCR_TKIP | 3425 WPS_ENCR_AES))) { 3426 if (cred->encr_type & WPS_ENCR_WEP) { 3427 wpa_printf(MSG_INFO, "WPS: Reject new AP settings " 3428 "due to WEP configuration"); 3429 return -1; 3430 } 3431 3432 wpa_printf(MSG_INFO, "WPS: Reject new AP settings due to " 3433 "invalid encr_type 0x%x", cred->encr_type); 3434 return -1; 3435 } 3436 3437 if ((cred->encr_type & (WPS_ENCR_TKIP | WPS_ENCR_AES)) == 3438 WPS_ENCR_TKIP) { 3439 wpa_printf(MSG_DEBUG, "WPS: Upgrade encr_type TKIP -> " 3440 "TKIP+AES"); 3441 cred->encr_type |= WPS_ENCR_AES; 3442 } 3443 3444 if ((cred->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) == 3445 WPS_AUTH_WPAPSK) { 3446 wpa_printf(MSG_DEBUG, "WPS: Upgrade auth_type WPAPSK -> " 3447 "WPAPSK+WPA2PSK"); 3448 cred->auth_type |= WPS_AUTH_WPA2PSK; 3449 } 3450#endif /* CONFIG_WPS2 */ 3451 3452 if (reg->wps->cred_cb) 3453 return reg->wps->cred_cb(reg->wps->cb_ctx, cred); 3454 3455 return -1; 3456} 3457 3458 3459#ifdef CONFIG_WPS_NFC 3460 3461int wps_registrar_add_nfc_pw_token(struct wps_registrar *reg, 3462 const u8 *pubkey_hash, u16 pw_id, 3463 const u8 *dev_pw, size_t dev_pw_len) 3464{ 3465 struct wps_nfc_pw_token *token; 3466 3467 if (dev_pw_len > WPS_OOB_DEVICE_PASSWORD_LEN) 3468 return -1; 3469 3470 wps_free_nfc_pw_tokens(®->nfc_pw_tokens, pw_id); 3471 3472 token = os_zalloc(sizeof(*token)); 3473 if (token == NULL) 3474 return -1; 3475 3476 os_memcpy(token->pubkey_hash, pubkey_hash, WPS_OOB_PUBKEY_HASH_LEN); 3477 token->pw_id = pw_id; 3478 os_memcpy(token->dev_pw, dev_pw, dev_pw_len); 3479 token->dev_pw_len = dev_pw_len; 3480 3481 dl_list_add(®->nfc_pw_tokens, &token->list); 3482 3483 reg->selected_registrar = 1; 3484 reg->pbc = 0; 3485 wps_registrar_add_authorized_mac(reg, 3486 (u8 *) "\xff\xff\xff\xff\xff\xff"); 3487 wps_registrar_selected_registrar_changed(reg); 3488 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 3489 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, 3490 wps_registrar_set_selected_timeout, 3491 reg, NULL); 3492 3493 return 0; 3494} 3495 3496 3497int wps_registrar_add_nfc_password_token(struct wps_registrar *reg, 3498 const u8 *oob_dev_pw, 3499 size_t oob_dev_pw_len) 3500{ 3501 const u8 *pos, *hash, *dev_pw; 3502 u16 id; 3503 size_t dev_pw_len; 3504 3505 if (oob_dev_pw_len < WPS_OOB_PUBKEY_HASH_LEN + 2 + 3506 WPS_OOB_DEVICE_PASSWORD_MIN_LEN || 3507 oob_dev_pw_len > WPS_OOB_PUBKEY_HASH_LEN + 2 + 3508 WPS_OOB_DEVICE_PASSWORD_LEN) 3509 return -1; 3510 3511 hash = oob_dev_pw; 3512 pos = oob_dev_pw + WPS_OOB_PUBKEY_HASH_LEN; 3513 id = WPA_GET_BE16(pos); 3514 dev_pw = pos + 2; 3515 dev_pw_len = oob_dev_pw + oob_dev_pw_len - dev_pw; 3516 3517 wpa_printf(MSG_DEBUG, "WPS: Add NFC Password Token for Password ID %u", 3518 id); 3519 3520 wpa_hexdump(MSG_DEBUG, "WPS: Public Key Hash", 3521 hash, WPS_OOB_PUBKEY_HASH_LEN); 3522 wpa_hexdump_key(MSG_DEBUG, "WPS: Device Password", dev_pw, dev_pw_len); 3523 3524 return wps_registrar_add_nfc_pw_token(reg, hash, id, dev_pw, 3525 dev_pw_len); 3526} 3527 3528 3529void wps_registrar_remove_nfc_pw_token(struct wps_registrar *reg, 3530 struct wps_nfc_pw_token *token) 3531{ 3532 wps_registrar_remove_authorized_mac(reg, 3533 (u8 *) "\xff\xff\xff\xff\xff\xff"); 3534 wps_registrar_selected_registrar_changed(reg); 3535} 3536 3537#endif /* CONFIG_WPS_NFC */ 3538