wps_registrar.c revision 15907098d1f67c24bb000e593e279af173cf57d7
1/* 2 * Wi-Fi Protected Setup - Registrar 3 * Copyright (c) 2008-2013, Jouni Malinen <j@w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9#include "utils/includes.h" 10 11#include "utils/common.h" 12#include "utils/base64.h" 13#include "utils/eloop.h" 14#include "utils/uuid.h" 15#include "utils/list.h" 16#include "crypto/crypto.h" 17#include "crypto/sha256.h" 18#include "crypto/random.h" 19#include "common/ieee802_11_defs.h" 20#include "wps_i.h" 21#include "wps_dev_attr.h" 22#include "wps_upnp.h" 23#include "wps_upnp_i.h" 24 25#ifndef CONFIG_WPS_STRICT 26#define WPS_WORKAROUNDS 27#endif /* CONFIG_WPS_STRICT */ 28 29#ifdef CONFIG_WPS_NFC 30 31struct wps_nfc_pw_token { 32 struct dl_list list; 33 u8 pubkey_hash[WPS_OOB_PUBKEY_HASH_LEN]; 34 unsigned int peer_pk_hash_known:1; 35 u16 pw_id; 36 u8 dev_pw[WPS_OOB_DEVICE_PASSWORD_LEN * 2 + 1]; 37 size_t dev_pw_len; 38 int pk_hash_provided_oob; /* whether own PK hash was provided OOB */ 39}; 40 41 42static void wps_remove_nfc_pw_token(struct wps_nfc_pw_token *token) 43{ 44 dl_list_del(&token->list); 45 os_free(token); 46} 47 48 49static void wps_free_nfc_pw_tokens(struct dl_list *tokens, u16 pw_id) 50{ 51 struct wps_nfc_pw_token *token, *prev; 52 dl_list_for_each_safe(token, prev, tokens, struct wps_nfc_pw_token, 53 list) { 54 if (pw_id == 0 || pw_id == token->pw_id) 55 wps_remove_nfc_pw_token(token); 56 } 57} 58 59 60static struct wps_nfc_pw_token * wps_get_nfc_pw_token(struct dl_list *tokens, 61 u16 pw_id) 62{ 63 struct wps_nfc_pw_token *token; 64 dl_list_for_each(token, tokens, struct wps_nfc_pw_token, list) { 65 if (pw_id == token->pw_id) 66 return token; 67 } 68 return NULL; 69} 70 71#else /* CONFIG_WPS_NFC */ 72 73#define wps_free_nfc_pw_tokens(t, p) do { } while (0) 74 75#endif /* CONFIG_WPS_NFC */ 76 77 78struct wps_uuid_pin { 79 struct dl_list list; 80 u8 uuid[WPS_UUID_LEN]; 81 int wildcard_uuid; 82 u8 *pin; 83 size_t pin_len; 84#define PIN_LOCKED BIT(0) 85#define PIN_EXPIRES BIT(1) 86 int flags; 87 struct os_reltime expiration; 88 u8 enrollee_addr[ETH_ALEN]; 89}; 90 91 92static void wps_free_pin(struct wps_uuid_pin *pin) 93{ 94 os_free(pin->pin); 95 os_free(pin); 96} 97 98 99static void wps_remove_pin(struct wps_uuid_pin *pin) 100{ 101 dl_list_del(&pin->list); 102 wps_free_pin(pin); 103} 104 105 106static void wps_free_pins(struct dl_list *pins) 107{ 108 struct wps_uuid_pin *pin, *prev; 109 dl_list_for_each_safe(pin, prev, pins, struct wps_uuid_pin, list) 110 wps_remove_pin(pin); 111} 112 113 114struct wps_pbc_session { 115 struct wps_pbc_session *next; 116 u8 addr[ETH_ALEN]; 117 u8 uuid_e[WPS_UUID_LEN]; 118 struct os_reltime timestamp; 119}; 120 121 122static void wps_free_pbc_sessions(struct wps_pbc_session *pbc) 123{ 124 struct wps_pbc_session *prev; 125 126 while (pbc) { 127 prev = pbc; 128 pbc = pbc->next; 129 os_free(prev); 130 } 131} 132 133 134struct wps_registrar_device { 135 struct wps_registrar_device *next; 136 struct wps_device_data dev; 137 u8 uuid[WPS_UUID_LEN]; 138}; 139 140 141struct wps_registrar { 142 struct wps_context *wps; 143 144 int pbc; 145 int selected_registrar; 146 147 int (*new_psk_cb)(void *ctx, const u8 *mac_addr, const u8 *p2p_dev_addr, 148 const u8 *psk, size_t psk_len); 149 int (*set_ie_cb)(void *ctx, struct wpabuf *beacon_ie, 150 struct wpabuf *probe_resp_ie); 151 void (*pin_needed_cb)(void *ctx, const u8 *uuid_e, 152 const struct wps_device_data *dev); 153 void (*reg_success_cb)(void *ctx, const u8 *mac_addr, 154 const u8 *uuid_e, const u8 *dev_pw, 155 size_t dev_pw_len); 156 void (*set_sel_reg_cb)(void *ctx, int sel_reg, u16 dev_passwd_id, 157 u16 sel_reg_config_methods); 158 void (*enrollee_seen_cb)(void *ctx, const u8 *addr, const u8 *uuid_e, 159 const u8 *pri_dev_type, u16 config_methods, 160 u16 dev_password_id, u8 request_type, 161 const char *dev_name); 162 void *cb_ctx; 163 164 struct dl_list pins; 165 struct dl_list nfc_pw_tokens; 166 struct wps_pbc_session *pbc_sessions; 167 168 int skip_cred_build; 169 struct wpabuf *extra_cred; 170 int disable_auto_conf; 171 int sel_reg_union; 172 int sel_reg_dev_password_id_override; 173 int sel_reg_config_methods_override; 174 int static_wep_only; 175 int dualband; 176 int force_per_enrollee_psk; 177 178 struct wps_registrar_device *devices; 179 180 int force_pbc_overlap; 181 182 u8 authorized_macs[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN]; 183 u8 authorized_macs_union[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN]; 184 185 u8 p2p_dev_addr[ETH_ALEN]; 186 187 u8 pbc_ignore_uuid[WPS_UUID_LEN]; 188#ifdef WPS_WORKAROUNDS 189 struct os_reltime pbc_ignore_start; 190#endif /* WPS_WORKAROUNDS */ 191}; 192 193 194static int wps_set_ie(struct wps_registrar *reg); 195static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx); 196static void wps_registrar_set_selected_timeout(void *eloop_ctx, 197 void *timeout_ctx); 198static void wps_registrar_remove_pin(struct wps_registrar *reg, 199 struct wps_uuid_pin *pin); 200 201 202static void wps_registrar_add_authorized_mac(struct wps_registrar *reg, 203 const u8 *addr) 204{ 205 int i; 206 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC " MACSTR, 207 MAC2STR(addr)); 208 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) 209 if (os_memcmp(reg->authorized_macs[i], addr, ETH_ALEN) == 0) { 210 wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was " 211 "already in the list"); 212 return; /* already in list */ 213 } 214 for (i = WPS_MAX_AUTHORIZED_MACS - 1; i > 0; i--) 215 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i - 1], 216 ETH_ALEN); 217 os_memcpy(reg->authorized_macs[0], addr, ETH_ALEN); 218 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs", 219 (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs)); 220} 221 222 223static void wps_registrar_remove_authorized_mac(struct wps_registrar *reg, 224 const u8 *addr) 225{ 226 int i; 227 wpa_printf(MSG_DEBUG, "WPS: Remove authorized MAC " MACSTR, 228 MAC2STR(addr)); 229 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) { 230 if (os_memcmp(reg->authorized_macs, addr, ETH_ALEN) == 0) 231 break; 232 } 233 if (i == WPS_MAX_AUTHORIZED_MACS) { 234 wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was not in the " 235 "list"); 236 return; /* not in the list */ 237 } 238 for (; i + 1 < WPS_MAX_AUTHORIZED_MACS; i++) 239 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i + 1], 240 ETH_ALEN); 241 os_memset(reg->authorized_macs[WPS_MAX_AUTHORIZED_MACS - 1], 0, 242 ETH_ALEN); 243 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs", 244 (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs)); 245} 246 247 248static void wps_free_devices(struct wps_registrar_device *dev) 249{ 250 struct wps_registrar_device *prev; 251 252 while (dev) { 253 prev = dev; 254 dev = dev->next; 255 wps_device_data_free(&prev->dev); 256 os_free(prev); 257 } 258} 259 260 261static struct wps_registrar_device * wps_device_get(struct wps_registrar *reg, 262 const u8 *addr) 263{ 264 struct wps_registrar_device *dev; 265 266 for (dev = reg->devices; dev; dev = dev->next) { 267 if (os_memcmp(dev->dev.mac_addr, addr, ETH_ALEN) == 0) 268 return dev; 269 } 270 return NULL; 271} 272 273 274static void wps_device_clone_data(struct wps_device_data *dst, 275 struct wps_device_data *src) 276{ 277 os_memcpy(dst->mac_addr, src->mac_addr, ETH_ALEN); 278 os_memcpy(dst->pri_dev_type, src->pri_dev_type, WPS_DEV_TYPE_LEN); 279 280#define WPS_STRDUP(n) \ 281 os_free(dst->n); \ 282 dst->n = src->n ? os_strdup(src->n) : NULL 283 284 WPS_STRDUP(device_name); 285 WPS_STRDUP(manufacturer); 286 WPS_STRDUP(model_name); 287 WPS_STRDUP(model_number); 288 WPS_STRDUP(serial_number); 289#undef WPS_STRDUP 290} 291 292 293int wps_device_store(struct wps_registrar *reg, 294 struct wps_device_data *dev, const u8 *uuid) 295{ 296 struct wps_registrar_device *d; 297 298 d = wps_device_get(reg, dev->mac_addr); 299 if (d == NULL) { 300 d = os_zalloc(sizeof(*d)); 301 if (d == NULL) 302 return -1; 303 d->next = reg->devices; 304 reg->devices = d; 305 } 306 307 wps_device_clone_data(&d->dev, dev); 308 os_memcpy(d->uuid, uuid, WPS_UUID_LEN); 309 310 return 0; 311} 312 313 314static void wps_registrar_add_pbc_session(struct wps_registrar *reg, 315 const u8 *addr, const u8 *uuid_e) 316{ 317 struct wps_pbc_session *pbc, *prev = NULL; 318 struct os_reltime now; 319 320 os_get_reltime(&now); 321 322 pbc = reg->pbc_sessions; 323 while (pbc) { 324 if (os_memcmp(pbc->addr, addr, ETH_ALEN) == 0 && 325 os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0) { 326 if (prev) 327 prev->next = pbc->next; 328 else 329 reg->pbc_sessions = pbc->next; 330 break; 331 } 332 prev = pbc; 333 pbc = pbc->next; 334 } 335 336 if (!pbc) { 337 pbc = os_zalloc(sizeof(*pbc)); 338 if (pbc == NULL) 339 return; 340 os_memcpy(pbc->addr, addr, ETH_ALEN); 341 if (uuid_e) 342 os_memcpy(pbc->uuid_e, uuid_e, WPS_UUID_LEN); 343 } 344 345 pbc->next = reg->pbc_sessions; 346 reg->pbc_sessions = pbc; 347 pbc->timestamp = now; 348 349 /* remove entries that have timed out */ 350 prev = pbc; 351 pbc = pbc->next; 352 353 while (pbc) { 354 if (os_reltime_expired(&now, &pbc->timestamp, 355 WPS_PBC_WALK_TIME)) { 356 prev->next = NULL; 357 wps_free_pbc_sessions(pbc); 358 break; 359 } 360 prev = pbc; 361 pbc = pbc->next; 362 } 363} 364 365 366static void wps_registrar_remove_pbc_session(struct wps_registrar *reg, 367 const u8 *uuid_e, 368 const u8 *p2p_dev_addr) 369{ 370 struct wps_pbc_session *pbc, *prev = NULL, *tmp; 371 372 pbc = reg->pbc_sessions; 373 while (pbc) { 374 if (os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0 || 375 (p2p_dev_addr && !is_zero_ether_addr(reg->p2p_dev_addr) && 376 os_memcmp(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN) == 377 0)) { 378 if (prev) 379 prev->next = pbc->next; 380 else 381 reg->pbc_sessions = pbc->next; 382 tmp = pbc; 383 pbc = pbc->next; 384 wpa_printf(MSG_DEBUG, "WPS: Removing PBC session for " 385 "addr=" MACSTR, MAC2STR(tmp->addr)); 386 wpa_hexdump(MSG_DEBUG, "WPS: Removed UUID-E", 387 tmp->uuid_e, WPS_UUID_LEN); 388 os_free(tmp); 389 continue; 390 } 391 prev = pbc; 392 pbc = pbc->next; 393 } 394} 395 396 397int wps_registrar_pbc_overlap(struct wps_registrar *reg, 398 const u8 *addr, const u8 *uuid_e) 399{ 400 int count = 0; 401 struct wps_pbc_session *pbc; 402 struct wps_pbc_session *first = NULL; 403 struct os_reltime now; 404 405 os_get_reltime(&now); 406 407 wpa_printf(MSG_DEBUG, "WPS: Checking active PBC sessions for overlap"); 408 409 if (uuid_e) { 410 wpa_printf(MSG_DEBUG, "WPS: Add one for the requested UUID"); 411 wpa_hexdump(MSG_DEBUG, "WPS: Requested UUID", 412 uuid_e, WPS_UUID_LEN); 413 count++; 414 } 415 416 for (pbc = reg->pbc_sessions; pbc; pbc = pbc->next) { 417 wpa_printf(MSG_DEBUG, "WPS: Consider PBC session with " MACSTR, 418 MAC2STR(pbc->addr)); 419 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", 420 pbc->uuid_e, WPS_UUID_LEN); 421 if (os_reltime_expired(&now, &pbc->timestamp, 422 WPS_PBC_WALK_TIME)) { 423 wpa_printf(MSG_DEBUG, "WPS: PBC walk time has expired"); 424 break; 425 } 426 if (first && 427 os_memcmp(pbc->uuid_e, first->uuid_e, WPS_UUID_LEN) == 0) { 428 wpa_printf(MSG_DEBUG, "WPS: Same Enrollee"); 429 continue; /* same Enrollee */ 430 } 431 if (uuid_e == NULL || 432 os_memcmp(uuid_e, pbc->uuid_e, WPS_UUID_LEN)) { 433 wpa_printf(MSG_DEBUG, "WPS: New Enrollee"); 434 count++; 435 } 436 if (first == NULL) 437 first = pbc; 438 } 439 440 wpa_printf(MSG_DEBUG, "WPS: %u active PBC session(s) found", count); 441 442 return count > 1 ? 1 : 0; 443} 444 445 446static int wps_build_wps_state(struct wps_context *wps, struct wpabuf *msg) 447{ 448 wpa_printf(MSG_DEBUG, "WPS: * Wi-Fi Protected Setup State (%d)", 449 wps->wps_state); 450 wpabuf_put_be16(msg, ATTR_WPS_STATE); 451 wpabuf_put_be16(msg, 1); 452 wpabuf_put_u8(msg, wps->wps_state); 453 return 0; 454} 455 456 457#ifdef CONFIG_WPS_UPNP 458static void wps_registrar_free_pending_m2(struct wps_context *wps) 459{ 460 struct upnp_pending_message *p, *p2, *prev = NULL; 461 p = wps->upnp_msgs; 462 while (p) { 463 if (p->type == WPS_M2 || p->type == WPS_M2D) { 464 if (prev == NULL) 465 wps->upnp_msgs = p->next; 466 else 467 prev->next = p->next; 468 wpa_printf(MSG_DEBUG, "WPS UPnP: Drop pending M2/M2D"); 469 p2 = p; 470 p = p->next; 471 wpabuf_free(p2->msg); 472 os_free(p2); 473 continue; 474 } 475 prev = p; 476 p = p->next; 477 } 478} 479#endif /* CONFIG_WPS_UPNP */ 480 481 482static int wps_build_ap_setup_locked(struct wps_context *wps, 483 struct wpabuf *msg) 484{ 485 if (wps->ap_setup_locked && wps->ap_setup_locked != 2) { 486 wpa_printf(MSG_DEBUG, "WPS: * AP Setup Locked"); 487 wpabuf_put_be16(msg, ATTR_AP_SETUP_LOCKED); 488 wpabuf_put_be16(msg, 1); 489 wpabuf_put_u8(msg, 1); 490 } 491 return 0; 492} 493 494 495static int wps_build_selected_registrar(struct wps_registrar *reg, 496 struct wpabuf *msg) 497{ 498 if (!reg->sel_reg_union) 499 return 0; 500 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar"); 501 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR); 502 wpabuf_put_be16(msg, 1); 503 wpabuf_put_u8(msg, 1); 504 return 0; 505} 506 507 508static int wps_build_sel_reg_dev_password_id(struct wps_registrar *reg, 509 struct wpabuf *msg) 510{ 511 u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT; 512 if (!reg->sel_reg_union) 513 return 0; 514 if (reg->sel_reg_dev_password_id_override >= 0) 515 id = reg->sel_reg_dev_password_id_override; 516 wpa_printf(MSG_DEBUG, "WPS: * Device Password ID (%d)", id); 517 wpabuf_put_be16(msg, ATTR_DEV_PASSWORD_ID); 518 wpabuf_put_be16(msg, 2); 519 wpabuf_put_be16(msg, id); 520 return 0; 521} 522 523 524static int wps_build_sel_pbc_reg_uuid_e(struct wps_registrar *reg, 525 struct wpabuf *msg) 526{ 527 u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT; 528 if (!reg->sel_reg_union) 529 return 0; 530 if (reg->sel_reg_dev_password_id_override >= 0) 531 id = reg->sel_reg_dev_password_id_override; 532 if (id != DEV_PW_PUSHBUTTON || !reg->dualband) 533 return 0; 534 return wps_build_uuid_e(msg, reg->wps->uuid); 535} 536 537 538static void wps_set_pushbutton(u16 *methods, u16 conf_methods) 539{ 540 *methods |= WPS_CONFIG_PUSHBUTTON; 541 if ((conf_methods & WPS_CONFIG_VIRT_PUSHBUTTON) == 542 WPS_CONFIG_VIRT_PUSHBUTTON) 543 *methods |= WPS_CONFIG_VIRT_PUSHBUTTON; 544 if ((conf_methods & WPS_CONFIG_PHY_PUSHBUTTON) == 545 WPS_CONFIG_PHY_PUSHBUTTON) 546 *methods |= WPS_CONFIG_PHY_PUSHBUTTON; 547 if ((*methods & WPS_CONFIG_VIRT_PUSHBUTTON) != 548 WPS_CONFIG_VIRT_PUSHBUTTON && 549 (*methods & WPS_CONFIG_PHY_PUSHBUTTON) != 550 WPS_CONFIG_PHY_PUSHBUTTON) { 551 /* 552 * Required to include virtual/physical flag, but we were not 553 * configured with push button type, so have to default to one 554 * of them. 555 */ 556 *methods |= WPS_CONFIG_PHY_PUSHBUTTON; 557 } 558} 559 560 561static int wps_build_sel_reg_config_methods(struct wps_registrar *reg, 562 struct wpabuf *msg) 563{ 564 u16 methods; 565 if (!reg->sel_reg_union) 566 return 0; 567 methods = reg->wps->config_methods; 568 methods &= ~WPS_CONFIG_PUSHBUTTON; 569 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 570 WPS_CONFIG_PHY_PUSHBUTTON); 571 if (reg->pbc) 572 wps_set_pushbutton(&methods, reg->wps->config_methods); 573 if (reg->sel_reg_config_methods_override >= 0) 574 methods = reg->sel_reg_config_methods_override; 575 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar Config Methods (%x)", 576 methods); 577 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR_CONFIG_METHODS); 578 wpabuf_put_be16(msg, 2); 579 wpabuf_put_be16(msg, methods); 580 return 0; 581} 582 583 584static int wps_build_probe_config_methods(struct wps_registrar *reg, 585 struct wpabuf *msg) 586{ 587 u16 methods; 588 /* 589 * These are the methods that the AP supports as an Enrollee for adding 590 * external Registrars. 591 */ 592 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 593 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 594 WPS_CONFIG_PHY_PUSHBUTTON); 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 while (*count < WPS_MAX_AUTHORIZED_MACS) { 615 if (is_zero_ether_addr(reg->authorized_macs_union[*count])) 616 break; 617 (*count)++; 618 } 619 620 return (const u8 *) reg->authorized_macs_union; 621} 622 623 624/** 625 * wps_registrar_init - Initialize WPS Registrar data 626 * @wps: Pointer to longterm WPS context 627 * @cfg: Registrar configuration 628 * Returns: Pointer to allocated Registrar data or %NULL on failure 629 * 630 * This function is used to initialize WPS Registrar functionality. It can be 631 * used for a single Registrar run (e.g., when run in a supplicant) or multiple 632 * runs (e.g., when run as an internal Registrar in an AP). Caller is 633 * responsible for freeing the returned data with wps_registrar_deinit() when 634 * Registrar functionality is not needed anymore. 635 */ 636struct wps_registrar * 637wps_registrar_init(struct wps_context *wps, 638 const struct wps_registrar_config *cfg) 639{ 640 struct wps_registrar *reg = os_zalloc(sizeof(*reg)); 641 if (reg == NULL) 642 return NULL; 643 644 dl_list_init(®->pins); 645 dl_list_init(®->nfc_pw_tokens); 646 reg->wps = wps; 647 reg->new_psk_cb = cfg->new_psk_cb; 648 reg->set_ie_cb = cfg->set_ie_cb; 649 reg->pin_needed_cb = cfg->pin_needed_cb; 650 reg->reg_success_cb = cfg->reg_success_cb; 651 reg->set_sel_reg_cb = cfg->set_sel_reg_cb; 652 reg->enrollee_seen_cb = cfg->enrollee_seen_cb; 653 reg->cb_ctx = cfg->cb_ctx; 654 reg->skip_cred_build = cfg->skip_cred_build; 655 if (cfg->extra_cred) { 656 reg->extra_cred = wpabuf_alloc_copy(cfg->extra_cred, 657 cfg->extra_cred_len); 658 if (reg->extra_cred == NULL) { 659 os_free(reg); 660 return NULL; 661 } 662 } 663 reg->disable_auto_conf = cfg->disable_auto_conf; 664 reg->sel_reg_dev_password_id_override = -1; 665 reg->sel_reg_config_methods_override = -1; 666 reg->static_wep_only = cfg->static_wep_only; 667 reg->dualband = cfg->dualband; 668 reg->force_per_enrollee_psk = cfg->force_per_enrollee_psk; 669 670 if (wps_set_ie(reg)) { 671 wps_registrar_deinit(reg); 672 return NULL; 673 } 674 675 return reg; 676} 677 678 679/** 680 * wps_registrar_deinit - Deinitialize WPS Registrar data 681 * @reg: Registrar data from wps_registrar_init() 682 */ 683void wps_registrar_deinit(struct wps_registrar *reg) 684{ 685 if (reg == NULL) 686 return; 687 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 688 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 689 wps_free_pins(®->pins); 690 wps_free_nfc_pw_tokens(®->nfc_pw_tokens, 0); 691 wps_free_pbc_sessions(reg->pbc_sessions); 692 wpabuf_free(reg->extra_cred); 693 wps_free_devices(reg->devices); 694 os_free(reg); 695} 696 697 698static void wps_registrar_invalidate_unused(struct wps_registrar *reg) 699{ 700 struct wps_uuid_pin *pin; 701 702 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 703 if (pin->wildcard_uuid == 1 && !(pin->flags & PIN_LOCKED)) { 704 wpa_printf(MSG_DEBUG, "WPS: Invalidate previously " 705 "configured wildcard PIN"); 706 wps_registrar_remove_pin(reg, pin); 707 break; 708 } 709 } 710} 711 712 713/** 714 * wps_registrar_add_pin - Configure a new PIN for Registrar 715 * @reg: Registrar data from wps_registrar_init() 716 * @addr: Enrollee MAC address or %NULL if not known 717 * @uuid: UUID-E or %NULL for wildcard (any UUID) 718 * @pin: PIN (Device Password) 719 * @pin_len: Length of pin in octets 720 * @timeout: Time (in seconds) when the PIN will be invalidated; 0 = no timeout 721 * Returns: 0 on success, -1 on failure 722 */ 723int wps_registrar_add_pin(struct wps_registrar *reg, const u8 *addr, 724 const u8 *uuid, const u8 *pin, size_t pin_len, 725 int timeout) 726{ 727 struct wps_uuid_pin *p; 728 729 p = os_zalloc(sizeof(*p)); 730 if (p == NULL) 731 return -1; 732 if (addr) 733 os_memcpy(p->enrollee_addr, addr, ETH_ALEN); 734 if (uuid == NULL) 735 p->wildcard_uuid = 1; 736 else 737 os_memcpy(p->uuid, uuid, WPS_UUID_LEN); 738 p->pin = os_malloc(pin_len); 739 if (p->pin == NULL) { 740 os_free(p); 741 return -1; 742 } 743 os_memcpy(p->pin, pin, pin_len); 744 p->pin_len = pin_len; 745 746 if (timeout) { 747 p->flags |= PIN_EXPIRES; 748 os_get_reltime(&p->expiration); 749 p->expiration.sec += timeout; 750 } 751 752 if (p->wildcard_uuid) 753 wps_registrar_invalidate_unused(reg); 754 755 dl_list_add(®->pins, &p->list); 756 757 wpa_printf(MSG_DEBUG, "WPS: A new PIN configured (timeout=%d)", 758 timeout); 759 wpa_hexdump(MSG_DEBUG, "WPS: UUID", uuid, WPS_UUID_LEN); 760 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: PIN", pin, pin_len); 761 reg->selected_registrar = 1; 762 reg->pbc = 0; 763 if (addr) 764 wps_registrar_add_authorized_mac(reg, addr); 765 else 766 wps_registrar_add_authorized_mac( 767 reg, (u8 *) "\xff\xff\xff\xff\xff\xff"); 768 wps_registrar_selected_registrar_changed(reg, 0); 769 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 770 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, 771 wps_registrar_set_selected_timeout, 772 reg, NULL); 773 774 return 0; 775} 776 777 778static void wps_registrar_remove_pin(struct wps_registrar *reg, 779 struct wps_uuid_pin *pin) 780{ 781 u8 *addr; 782 u8 bcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 783 784 if (is_zero_ether_addr(pin->enrollee_addr)) 785 addr = bcast; 786 else 787 addr = pin->enrollee_addr; 788 wps_registrar_remove_authorized_mac(reg, addr); 789 wps_remove_pin(pin); 790 wps_registrar_selected_registrar_changed(reg, 0); 791} 792 793 794static void wps_registrar_expire_pins(struct wps_registrar *reg) 795{ 796 struct wps_uuid_pin *pin, *prev; 797 struct os_reltime now; 798 799 os_get_reltime(&now); 800 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 801 { 802 if ((pin->flags & PIN_EXPIRES) && 803 os_reltime_before(&pin->expiration, &now)) { 804 wpa_hexdump(MSG_DEBUG, "WPS: Expired PIN for UUID", 805 pin->uuid, WPS_UUID_LEN); 806 wps_registrar_remove_pin(reg, pin); 807 } 808 } 809} 810 811 812/** 813 * wps_registrar_invalidate_wildcard_pin - Invalidate a wildcard PIN 814 * @reg: Registrar data from wps_registrar_init() 815 * @dev_pw: PIN to search for or %NULL to match any 816 * @dev_pw_len: Length of dev_pw in octets 817 * Returns: 0 on success, -1 if not wildcard PIN is enabled 818 */ 819static int wps_registrar_invalidate_wildcard_pin(struct wps_registrar *reg, 820 const u8 *dev_pw, 821 size_t dev_pw_len) 822{ 823 struct wps_uuid_pin *pin, *prev; 824 825 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 826 { 827 if (dev_pw && pin->pin && 828 (dev_pw_len != pin->pin_len || 829 os_memcmp(dev_pw, pin->pin, dev_pw_len) != 0)) 830 continue; /* different PIN */ 831 if (pin->wildcard_uuid) { 832 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID", 833 pin->uuid, WPS_UUID_LEN); 834 wps_registrar_remove_pin(reg, pin); 835 return 0; 836 } 837 } 838 839 return -1; 840} 841 842 843/** 844 * wps_registrar_invalidate_pin - Invalidate a PIN for a specific UUID-E 845 * @reg: Registrar data from wps_registrar_init() 846 * @uuid: UUID-E 847 * Returns: 0 on success, -1 on failure (e.g., PIN not found) 848 */ 849int wps_registrar_invalidate_pin(struct wps_registrar *reg, const u8 *uuid) 850{ 851 struct wps_uuid_pin *pin, *prev; 852 853 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 854 { 855 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 856 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID", 857 pin->uuid, WPS_UUID_LEN); 858 wps_registrar_remove_pin(reg, pin); 859 return 0; 860 } 861 } 862 863 return -1; 864} 865 866 867static const u8 * wps_registrar_get_pin(struct wps_registrar *reg, 868 const u8 *uuid, size_t *pin_len) 869{ 870 struct wps_uuid_pin *pin, *found = NULL; 871 872 wps_registrar_expire_pins(reg); 873 874 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 875 if (!pin->wildcard_uuid && 876 os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 877 found = pin; 878 break; 879 } 880 } 881 882 if (!found) { 883 /* Check for wildcard UUIDs since none of the UUID-specific 884 * PINs matched */ 885 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 886 if (pin->wildcard_uuid == 1 || 887 pin->wildcard_uuid == 2) { 888 wpa_printf(MSG_DEBUG, "WPS: Found a wildcard " 889 "PIN. Assigned it for this UUID-E"); 890 pin->wildcard_uuid++; 891 os_memcpy(pin->uuid, uuid, WPS_UUID_LEN); 892 found = pin; 893 break; 894 } 895 } 896 } 897 898 if (!found) 899 return NULL; 900 901 /* 902 * Lock the PIN to avoid attacks based on concurrent re-use of the PIN 903 * that could otherwise avoid PIN invalidations. 904 */ 905 if (found->flags & PIN_LOCKED) { 906 wpa_printf(MSG_DEBUG, "WPS: Selected PIN locked - do not " 907 "allow concurrent re-use"); 908 return NULL; 909 } 910 *pin_len = found->pin_len; 911 found->flags |= PIN_LOCKED; 912 return found->pin; 913} 914 915 916/** 917 * wps_registrar_unlock_pin - Unlock a PIN for a specific UUID-E 918 * @reg: Registrar data from wps_registrar_init() 919 * @uuid: UUID-E 920 * Returns: 0 on success, -1 on failure 921 * 922 * PINs are locked to enforce only one concurrent use. This function unlocks a 923 * PIN to allow it to be used again. If the specified PIN was configured using 924 * a wildcard UUID, it will be removed instead of allowing multiple uses. 925 */ 926int wps_registrar_unlock_pin(struct wps_registrar *reg, const u8 *uuid) 927{ 928 struct wps_uuid_pin *pin; 929 930 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 931 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 932 if (pin->wildcard_uuid == 3) { 933 wpa_printf(MSG_DEBUG, "WPS: Invalidating used " 934 "wildcard PIN"); 935 return wps_registrar_invalidate_pin(reg, uuid); 936 } 937 pin->flags &= ~PIN_LOCKED; 938 return 0; 939 } 940 } 941 942 return -1; 943} 944 945 946static void wps_registrar_stop_pbc(struct wps_registrar *reg) 947{ 948 reg->selected_registrar = 0; 949 reg->pbc = 0; 950 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN); 951 wps_registrar_remove_authorized_mac(reg, 952 (u8 *) "\xff\xff\xff\xff\xff\xff"); 953 wps_registrar_selected_registrar_changed(reg, 0); 954} 955 956 957static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx) 958{ 959 struct wps_registrar *reg = eloop_ctx; 960 961 wpa_printf(MSG_DEBUG, "WPS: PBC timed out - disable PBC mode"); 962 wps_pbc_timeout_event(reg->wps); 963 wps_registrar_stop_pbc(reg); 964} 965 966 967/** 968 * wps_registrar_button_pushed - Notify Registrar that AP button was pushed 969 * @reg: Registrar data from wps_registrar_init() 970 * @p2p_dev_addr: Limit allowed PBC devices to the specified P2P device, %NULL 971 * indicates no such filtering 972 * Returns: 0 on success, -1 on failure, -2 on session overlap 973 * 974 * This function is called on an AP when a push button is pushed to activate 975 * PBC mode. The PBC mode will be stopped after walk time (2 minutes) timeout 976 * or when a PBC registration is completed. If more than one Enrollee in active 977 * PBC mode has been detected during the monitor time (previous 2 minutes), the 978 * PBC mode is not activated and -2 is returned to indicate session overlap. 979 * This is skipped if a specific Enrollee is selected. 980 */ 981int wps_registrar_button_pushed(struct wps_registrar *reg, 982 const u8 *p2p_dev_addr) 983{ 984 if (p2p_dev_addr == NULL && 985 wps_registrar_pbc_overlap(reg, NULL, NULL)) { 986 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - do not start PBC " 987 "mode"); 988 wps_pbc_overlap_event(reg->wps); 989 return -2; 990 } 991 wpa_printf(MSG_DEBUG, "WPS: Button pushed - PBC mode started"); 992 reg->force_pbc_overlap = 0; 993 reg->selected_registrar = 1; 994 reg->pbc = 1; 995 if (p2p_dev_addr) 996 os_memcpy(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN); 997 else 998 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN); 999 wps_registrar_add_authorized_mac(reg, 1000 (u8 *) "\xff\xff\xff\xff\xff\xff"); 1001 wps_registrar_selected_registrar_changed(reg, 0); 1002 1003 wps_pbc_active_event(reg->wps); 1004 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 1005 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 1006 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wps_registrar_pbc_timeout, 1007 reg, NULL); 1008 return 0; 1009} 1010 1011 1012static void wps_registrar_pbc_completed(struct wps_registrar *reg) 1013{ 1014 wpa_printf(MSG_DEBUG, "WPS: PBC completed - stopping PBC mode"); 1015 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 1016 wps_registrar_stop_pbc(reg); 1017 wps_pbc_disable_event(reg->wps); 1018} 1019 1020 1021static void wps_registrar_pin_completed(struct wps_registrar *reg) 1022{ 1023 wpa_printf(MSG_DEBUG, "WPS: PIN completed using internal Registrar"); 1024 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 1025 reg->selected_registrar = 0; 1026 wps_registrar_selected_registrar_changed(reg, 0); 1027} 1028 1029 1030void wps_registrar_complete(struct wps_registrar *registrar, const u8 *uuid_e, 1031 const u8 *dev_pw, size_t dev_pw_len) 1032{ 1033 if (registrar->pbc) { 1034 wps_registrar_remove_pbc_session(registrar, 1035 uuid_e, NULL); 1036 wps_registrar_pbc_completed(registrar); 1037#ifdef WPS_WORKAROUNDS 1038 os_get_reltime(®istrar->pbc_ignore_start); 1039#endif /* WPS_WORKAROUNDS */ 1040 os_memcpy(registrar->pbc_ignore_uuid, uuid_e, WPS_UUID_LEN); 1041 } else { 1042 wps_registrar_pin_completed(registrar); 1043 } 1044 1045 if (dev_pw && 1046 wps_registrar_invalidate_wildcard_pin(registrar, dev_pw, 1047 dev_pw_len) == 0) { 1048 wpa_hexdump_key(MSG_DEBUG, "WPS: Invalidated wildcard PIN", 1049 dev_pw, dev_pw_len); 1050 } 1051} 1052 1053 1054int wps_registrar_wps_cancel(struct wps_registrar *reg) 1055{ 1056 if (reg->pbc) { 1057 wpa_printf(MSG_DEBUG, "WPS: PBC is set - cancelling it"); 1058 wps_registrar_pbc_timeout(reg, NULL); 1059 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 1060 return 1; 1061 } else if (reg->selected_registrar) { 1062 /* PIN Method */ 1063 wpa_printf(MSG_DEBUG, "WPS: PIN is set - cancelling it"); 1064 wps_registrar_pin_completed(reg); 1065 wps_registrar_invalidate_wildcard_pin(reg, NULL, 0); 1066 return 1; 1067 } 1068 return 0; 1069} 1070 1071 1072/** 1073 * wps_registrar_probe_req_rx - Notify Registrar of Probe Request 1074 * @reg: Registrar data from wps_registrar_init() 1075 * @addr: MAC address of the Probe Request sender 1076 * @wps_data: WPS IE contents 1077 * 1078 * This function is called on an AP when a Probe Request with WPS IE is 1079 * received. This is used to track PBC mode use and to detect possible overlap 1080 * situation with other WPS APs. 1081 */ 1082void wps_registrar_probe_req_rx(struct wps_registrar *reg, const u8 *addr, 1083 const struct wpabuf *wps_data, 1084 int p2p_wildcard) 1085{ 1086 struct wps_parse_attr attr; 1087 int skip_add = 0; 1088 1089 wpa_hexdump_buf(MSG_MSGDUMP, 1090 "WPS: Probe Request with WPS data received", 1091 wps_data); 1092 1093 if (wps_parse_msg(wps_data, &attr) < 0) 1094 return; 1095 1096 if (attr.config_methods == NULL) { 1097 wpa_printf(MSG_DEBUG, "WPS: No Config Methods attribute in " 1098 "Probe Request"); 1099 return; 1100 } 1101 1102 if (attr.dev_password_id == NULL) { 1103 wpa_printf(MSG_DEBUG, "WPS: No Device Password Id attribute " 1104 "in Probe Request"); 1105 return; 1106 } 1107 1108 if (reg->enrollee_seen_cb && attr.uuid_e && 1109 attr.primary_dev_type && attr.request_type && !p2p_wildcard) { 1110 char *dev_name = NULL; 1111 if (attr.dev_name) { 1112 dev_name = os_zalloc(attr.dev_name_len + 1); 1113 if (dev_name) { 1114 os_memcpy(dev_name, attr.dev_name, 1115 attr.dev_name_len); 1116 } 1117 } 1118 reg->enrollee_seen_cb(reg->cb_ctx, addr, attr.uuid_e, 1119 attr.primary_dev_type, 1120 WPA_GET_BE16(attr.config_methods), 1121 WPA_GET_BE16(attr.dev_password_id), 1122 *attr.request_type, dev_name); 1123 os_free(dev_name); 1124 } 1125 1126 if (WPA_GET_BE16(attr.dev_password_id) != DEV_PW_PUSHBUTTON) 1127 return; /* Not PBC */ 1128 1129 wpa_printf(MSG_DEBUG, "WPS: Probe Request for PBC received from " 1130 MACSTR, MAC2STR(addr)); 1131 if (attr.uuid_e == NULL) { 1132 wpa_printf(MSG_DEBUG, "WPS: Invalid Probe Request WPS IE: No " 1133 "UUID-E included"); 1134 return; 1135 } 1136 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E from Probe Request", attr.uuid_e, 1137 WPS_UUID_LEN); 1138 1139#ifdef WPS_WORKAROUNDS 1140 if (reg->pbc_ignore_start.sec && 1141 os_memcmp(attr.uuid_e, reg->pbc_ignore_uuid, WPS_UUID_LEN) == 0) { 1142 struct os_reltime now, dur; 1143 os_get_reltime(&now); 1144 os_reltime_sub(&now, ®->pbc_ignore_start, &dur); 1145 if (dur.sec >= 0 && dur.sec < 5) { 1146 wpa_printf(MSG_DEBUG, "WPS: Ignore PBC activation " 1147 "based on Probe Request from the Enrollee " 1148 "that just completed PBC provisioning"); 1149 skip_add = 1; 1150 } else 1151 reg->pbc_ignore_start.sec = 0; 1152 } 1153#endif /* WPS_WORKAROUNDS */ 1154 1155 if (!skip_add) 1156 wps_registrar_add_pbc_session(reg, addr, attr.uuid_e); 1157 if (wps_registrar_pbc_overlap(reg, addr, attr.uuid_e)) { 1158 wpa_printf(MSG_DEBUG, "WPS: PBC session overlap detected"); 1159 reg->force_pbc_overlap = 1; 1160 wps_pbc_overlap_event(reg->wps); 1161 } 1162} 1163 1164 1165int wps_cb_new_psk(struct wps_registrar *reg, const u8 *mac_addr, 1166 const u8 *p2p_dev_addr, const u8 *psk, size_t psk_len) 1167{ 1168 if (reg->new_psk_cb == NULL) 1169 return 0; 1170 1171 return reg->new_psk_cb(reg->cb_ctx, mac_addr, p2p_dev_addr, psk, 1172 psk_len); 1173} 1174 1175 1176static void wps_cb_pin_needed(struct wps_registrar *reg, const u8 *uuid_e, 1177 const struct wps_device_data *dev) 1178{ 1179 if (reg->pin_needed_cb == NULL) 1180 return; 1181 1182 reg->pin_needed_cb(reg->cb_ctx, uuid_e, dev); 1183} 1184 1185 1186static void wps_cb_reg_success(struct wps_registrar *reg, const u8 *mac_addr, 1187 const u8 *uuid_e, const u8 *dev_pw, 1188 size_t dev_pw_len) 1189{ 1190 if (reg->reg_success_cb == NULL) 1191 return; 1192 1193 reg->reg_success_cb(reg->cb_ctx, mac_addr, uuid_e, dev_pw, dev_pw_len); 1194} 1195 1196 1197static int wps_cb_set_ie(struct wps_registrar *reg, struct wpabuf *beacon_ie, 1198 struct wpabuf *probe_resp_ie) 1199{ 1200 return reg->set_ie_cb(reg->cb_ctx, beacon_ie, probe_resp_ie); 1201} 1202 1203 1204static void wps_cb_set_sel_reg(struct wps_registrar *reg) 1205{ 1206 u16 methods = 0; 1207 if (reg->set_sel_reg_cb == NULL) 1208 return; 1209 1210 if (reg->selected_registrar) { 1211 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 1212 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 1213 WPS_CONFIG_PHY_PUSHBUTTON); 1214 if (reg->pbc) 1215 wps_set_pushbutton(&methods, reg->wps->config_methods); 1216 } 1217 1218 wpa_printf(MSG_DEBUG, "WPS: wps_cb_set_sel_reg: sel_reg=%d " 1219 "config_methods=0x%x pbc=%d methods=0x%x", 1220 reg->selected_registrar, reg->wps->config_methods, 1221 reg->pbc, methods); 1222 1223 reg->set_sel_reg_cb(reg->cb_ctx, reg->selected_registrar, 1224 reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT, 1225 methods); 1226} 1227 1228 1229static int wps_set_ie(struct wps_registrar *reg) 1230{ 1231 struct wpabuf *beacon; 1232 struct wpabuf *probe; 1233 const u8 *auth_macs; 1234 size_t count; 1235 size_t vendor_len = 0; 1236 int i; 1237 1238 if (reg->set_ie_cb == NULL) 1239 return 0; 1240 1241 for (i = 0; i < MAX_WPS_VENDOR_EXTENSIONS; i++) { 1242 if (reg->wps->dev.vendor_ext[i]) { 1243 vendor_len += 2 + 2; 1244 vendor_len += wpabuf_len(reg->wps->dev.vendor_ext[i]); 1245 } 1246 } 1247 1248 beacon = wpabuf_alloc(400 + vendor_len); 1249 if (beacon == NULL) 1250 return -1; 1251 probe = wpabuf_alloc(500 + vendor_len); 1252 if (probe == NULL) { 1253 wpabuf_free(beacon); 1254 return -1; 1255 } 1256 1257 auth_macs = wps_authorized_macs(reg, &count); 1258 1259 wpa_printf(MSG_DEBUG, "WPS: Build Beacon IEs"); 1260 1261 if (wps_build_version(beacon) || 1262 wps_build_wps_state(reg->wps, beacon) || 1263 wps_build_ap_setup_locked(reg->wps, beacon) || 1264 wps_build_selected_registrar(reg, beacon) || 1265 wps_build_sel_reg_dev_password_id(reg, beacon) || 1266 wps_build_sel_reg_config_methods(reg, beacon) || 1267 wps_build_sel_pbc_reg_uuid_e(reg, beacon) || 1268 (reg->dualband && wps_build_rf_bands(®->wps->dev, beacon, 0)) || 1269 wps_build_wfa_ext(beacon, 0, auth_macs, count) || 1270 wps_build_vendor_ext(®->wps->dev, beacon)) { 1271 wpabuf_free(beacon); 1272 wpabuf_free(probe); 1273 return -1; 1274 } 1275 1276#ifdef CONFIG_P2P 1277 if (wps_build_dev_name(®->wps->dev, beacon) || 1278 wps_build_primary_dev_type(®->wps->dev, beacon)) { 1279 wpabuf_free(beacon); 1280 wpabuf_free(probe); 1281 return -1; 1282 } 1283#endif /* CONFIG_P2P */ 1284 1285 wpa_printf(MSG_DEBUG, "WPS: Build Probe Response IEs"); 1286 1287 if (wps_build_version(probe) || 1288 wps_build_wps_state(reg->wps, probe) || 1289 wps_build_ap_setup_locked(reg->wps, probe) || 1290 wps_build_selected_registrar(reg, probe) || 1291 wps_build_sel_reg_dev_password_id(reg, probe) || 1292 wps_build_sel_reg_config_methods(reg, probe) || 1293 wps_build_resp_type(probe, reg->wps->ap ? WPS_RESP_AP : 1294 WPS_RESP_REGISTRAR) || 1295 wps_build_uuid_e(probe, reg->wps->uuid) || 1296 wps_build_device_attrs(®->wps->dev, probe) || 1297 wps_build_probe_config_methods(reg, probe) || 1298 (reg->dualband && wps_build_rf_bands(®->wps->dev, probe, 0)) || 1299 wps_build_wfa_ext(probe, 0, auth_macs, count) || 1300 wps_build_vendor_ext(®->wps->dev, probe)) { 1301 wpabuf_free(beacon); 1302 wpabuf_free(probe); 1303 return -1; 1304 } 1305 1306 beacon = wps_ie_encapsulate(beacon); 1307 probe = wps_ie_encapsulate(probe); 1308 1309 if (!beacon || !probe) { 1310 wpabuf_free(beacon); 1311 wpabuf_free(probe); 1312 return -1; 1313 } 1314 1315 if (reg->static_wep_only) { 1316 /* 1317 * Windows XP and Vista clients can get confused about 1318 * EAP-Identity/Request when they probe the network with 1319 * EAPOL-Start. In such a case, they may assume the network is 1320 * using IEEE 802.1X and prompt user for a certificate while 1321 * the correct (non-WPS) behavior would be to ask for the 1322 * static WEP key. As a workaround, use Microsoft Provisioning 1323 * IE to advertise that legacy 802.1X is not supported. 1324 */ 1325 const u8 ms_wps[7] = { 1326 WLAN_EID_VENDOR_SPECIFIC, 5, 1327 /* Microsoft Provisioning IE (00:50:f2:5) */ 1328 0x00, 0x50, 0xf2, 5, 1329 0x00 /* no legacy 802.1X or MS WPS */ 1330 }; 1331 wpa_printf(MSG_DEBUG, "WPS: Add Microsoft Provisioning IE " 1332 "into Beacon/Probe Response frames"); 1333 wpabuf_put_data(beacon, ms_wps, sizeof(ms_wps)); 1334 wpabuf_put_data(probe, ms_wps, sizeof(ms_wps)); 1335 } 1336 1337 return wps_cb_set_ie(reg, beacon, probe); 1338} 1339 1340 1341static int wps_get_dev_password(struct wps_data *wps) 1342{ 1343 const u8 *pin; 1344 size_t pin_len = 0; 1345 1346 os_free(wps->dev_password); 1347 wps->dev_password = NULL; 1348 1349 if (wps->pbc) { 1350 wpa_printf(MSG_DEBUG, "WPS: Use default PIN for PBC"); 1351 pin = (const u8 *) "00000000"; 1352 pin_len = 8; 1353#ifdef CONFIG_WPS_NFC 1354 } else if (wps->nfc_pw_token) { 1355 if (wps->nfc_pw_token->pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) 1356 { 1357 wpa_printf(MSG_DEBUG, "WPS: Using NFC connection " 1358 "handover and abbreviated WPS handshake " 1359 "without Device Password"); 1360 return 0; 1361 } 1362 wpa_printf(MSG_DEBUG, "WPS: Use OOB Device Password from NFC " 1363 "Password Token"); 1364 pin = wps->nfc_pw_token->dev_pw; 1365 pin_len = wps->nfc_pw_token->dev_pw_len; 1366 } else if (wps->dev_pw_id >= 0x10 && 1367 wps->wps->ap_nfc_dev_pw_id == wps->dev_pw_id && 1368 wps->wps->ap_nfc_dev_pw) { 1369 wpa_printf(MSG_DEBUG, "WPS: Use OOB Device Password from own NFC Password Token"); 1370 pin = wpabuf_head(wps->wps->ap_nfc_dev_pw); 1371 pin_len = wpabuf_len(wps->wps->ap_nfc_dev_pw); 1372#endif /* CONFIG_WPS_NFC */ 1373 } else { 1374 pin = wps_registrar_get_pin(wps->wps->registrar, wps->uuid_e, 1375 &pin_len); 1376 if (pin && wps->dev_pw_id >= 0x10) { 1377 wpa_printf(MSG_DEBUG, "WPS: No match for OOB Device " 1378 "Password ID, but PIN found"); 1379 /* 1380 * See whether Enrollee is willing to use PIN instead. 1381 */ 1382 wps->dev_pw_id = DEV_PW_DEFAULT; 1383 } 1384 } 1385 if (pin == NULL) { 1386 wpa_printf(MSG_DEBUG, "WPS: No Device Password available for " 1387 "the Enrollee (context %p registrar %p)", 1388 wps->wps, wps->wps->registrar); 1389 wps_cb_pin_needed(wps->wps->registrar, wps->uuid_e, 1390 &wps->peer_dev); 1391 return -1; 1392 } 1393 1394 wps->dev_password = os_malloc(pin_len); 1395 if (wps->dev_password == NULL) 1396 return -1; 1397 os_memcpy(wps->dev_password, pin, pin_len); 1398 wps->dev_password_len = pin_len; 1399 1400 return 0; 1401} 1402 1403 1404static int wps_build_uuid_r(struct wps_data *wps, struct wpabuf *msg) 1405{ 1406 wpa_printf(MSG_DEBUG, "WPS: * UUID-R"); 1407 wpabuf_put_be16(msg, ATTR_UUID_R); 1408 wpabuf_put_be16(msg, WPS_UUID_LEN); 1409 wpabuf_put_data(msg, wps->uuid_r, WPS_UUID_LEN); 1410 return 0; 1411} 1412 1413 1414static int wps_build_r_hash(struct wps_data *wps, struct wpabuf *msg) 1415{ 1416 u8 *hash; 1417 const u8 *addr[4]; 1418 size_t len[4]; 1419 1420 if (random_get_bytes(wps->snonce, 2 * WPS_SECRET_NONCE_LEN) < 0) 1421 return -1; 1422 wpa_hexdump(MSG_DEBUG, "WPS: R-S1", wps->snonce, WPS_SECRET_NONCE_LEN); 1423 wpa_hexdump(MSG_DEBUG, "WPS: R-S2", 1424 wps->snonce + WPS_SECRET_NONCE_LEN, WPS_SECRET_NONCE_LEN); 1425 1426 if (wps->dh_pubkey_e == NULL || wps->dh_pubkey_r == NULL) { 1427 wpa_printf(MSG_DEBUG, "WPS: DH public keys not available for " 1428 "R-Hash derivation"); 1429 return -1; 1430 } 1431 1432 wpa_printf(MSG_DEBUG, "WPS: * R-Hash1"); 1433 wpabuf_put_be16(msg, ATTR_R_HASH1); 1434 wpabuf_put_be16(msg, SHA256_MAC_LEN); 1435 hash = wpabuf_put(msg, SHA256_MAC_LEN); 1436 /* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */ 1437 addr[0] = wps->snonce; 1438 len[0] = WPS_SECRET_NONCE_LEN; 1439 addr[1] = wps->psk1; 1440 len[1] = WPS_PSK_LEN; 1441 addr[2] = wpabuf_head(wps->dh_pubkey_e); 1442 len[2] = wpabuf_len(wps->dh_pubkey_e); 1443 addr[3] = wpabuf_head(wps->dh_pubkey_r); 1444 len[3] = wpabuf_len(wps->dh_pubkey_r); 1445 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 1446 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash1", hash, SHA256_MAC_LEN); 1447 1448 wpa_printf(MSG_DEBUG, "WPS: * R-Hash2"); 1449 wpabuf_put_be16(msg, ATTR_R_HASH2); 1450 wpabuf_put_be16(msg, SHA256_MAC_LEN); 1451 hash = wpabuf_put(msg, SHA256_MAC_LEN); 1452 /* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */ 1453 addr[0] = wps->snonce + WPS_SECRET_NONCE_LEN; 1454 addr[1] = wps->psk2; 1455 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 1456 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash2", hash, SHA256_MAC_LEN); 1457 1458 return 0; 1459} 1460 1461 1462static int wps_build_r_snonce1(struct wps_data *wps, struct wpabuf *msg) 1463{ 1464 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce1"); 1465 wpabuf_put_be16(msg, ATTR_R_SNONCE1); 1466 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN); 1467 wpabuf_put_data(msg, wps->snonce, WPS_SECRET_NONCE_LEN); 1468 return 0; 1469} 1470 1471 1472static int wps_build_r_snonce2(struct wps_data *wps, struct wpabuf *msg) 1473{ 1474 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce2"); 1475 wpabuf_put_be16(msg, ATTR_R_SNONCE2); 1476 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN); 1477 wpabuf_put_data(msg, wps->snonce + WPS_SECRET_NONCE_LEN, 1478 WPS_SECRET_NONCE_LEN); 1479 return 0; 1480} 1481 1482 1483static int wps_build_cred_network_idx(struct wpabuf *msg, 1484 const struct wps_credential *cred) 1485{ 1486 wpa_printf(MSG_DEBUG, "WPS: * Network Index (1)"); 1487 wpabuf_put_be16(msg, ATTR_NETWORK_INDEX); 1488 wpabuf_put_be16(msg, 1); 1489 wpabuf_put_u8(msg, 1); 1490 return 0; 1491} 1492 1493 1494static int wps_build_cred_ssid(struct wpabuf *msg, 1495 const struct wps_credential *cred) 1496{ 1497 wpa_printf(MSG_DEBUG, "WPS: * SSID"); 1498 wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID for Credential", 1499 cred->ssid, cred->ssid_len); 1500 wpabuf_put_be16(msg, ATTR_SSID); 1501 wpabuf_put_be16(msg, cred->ssid_len); 1502 wpabuf_put_data(msg, cred->ssid, cred->ssid_len); 1503 return 0; 1504} 1505 1506 1507static int wps_build_cred_auth_type(struct wpabuf *msg, 1508 const struct wps_credential *cred) 1509{ 1510 wpa_printf(MSG_DEBUG, "WPS: * Authentication Type (0x%x)", 1511 cred->auth_type); 1512 wpabuf_put_be16(msg, ATTR_AUTH_TYPE); 1513 wpabuf_put_be16(msg, 2); 1514 wpabuf_put_be16(msg, cred->auth_type); 1515 return 0; 1516} 1517 1518 1519static int wps_build_cred_encr_type(struct wpabuf *msg, 1520 const struct wps_credential *cred) 1521{ 1522 wpa_printf(MSG_DEBUG, "WPS: * Encryption Type (0x%x)", 1523 cred->encr_type); 1524 wpabuf_put_be16(msg, ATTR_ENCR_TYPE); 1525 wpabuf_put_be16(msg, 2); 1526 wpabuf_put_be16(msg, cred->encr_type); 1527 return 0; 1528} 1529 1530 1531static int wps_build_cred_network_key(struct wpabuf *msg, 1532 const struct wps_credential *cred) 1533{ 1534 wpa_printf(MSG_DEBUG, "WPS: * Network Key (len=%d)", 1535 (int) cred->key_len); 1536 wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key", 1537 cred->key, cred->key_len); 1538 wpabuf_put_be16(msg, ATTR_NETWORK_KEY); 1539 wpabuf_put_be16(msg, cred->key_len); 1540 wpabuf_put_data(msg, cred->key, cred->key_len); 1541 return 0; 1542} 1543 1544 1545static int wps_build_credential(struct wpabuf *msg, 1546 const struct wps_credential *cred) 1547{ 1548 if (wps_build_cred_network_idx(msg, cred) || 1549 wps_build_cred_ssid(msg, cred) || 1550 wps_build_cred_auth_type(msg, cred) || 1551 wps_build_cred_encr_type(msg, cred) || 1552 wps_build_cred_network_key(msg, cred) || 1553 wps_build_mac_addr(msg, cred->mac_addr)) 1554 return -1; 1555 return 0; 1556} 1557 1558 1559int wps_build_credential_wrap(struct wpabuf *msg, 1560 const struct wps_credential *cred) 1561{ 1562 struct wpabuf *wbuf; 1563 wbuf = wpabuf_alloc(200); 1564 if (wbuf == NULL) 1565 return -1; 1566 if (wps_build_credential(wbuf, cred)) { 1567 wpabuf_free(wbuf); 1568 return -1; 1569 } 1570 wpabuf_put_be16(msg, ATTR_CRED); 1571 wpabuf_put_be16(msg, wpabuf_len(wbuf)); 1572 wpabuf_put_buf(msg, wbuf); 1573 wpabuf_free(wbuf); 1574 return 0; 1575} 1576 1577 1578int wps_build_cred(struct wps_data *wps, struct wpabuf *msg) 1579{ 1580 struct wpabuf *cred; 1581 1582 if (wps->wps->registrar->skip_cred_build) 1583 goto skip_cred_build; 1584 1585 wpa_printf(MSG_DEBUG, "WPS: * Credential"); 1586 if (wps->use_cred) { 1587 os_memcpy(&wps->cred, wps->use_cred, sizeof(wps->cred)); 1588 goto use_provided; 1589 } 1590 os_memset(&wps->cred, 0, sizeof(wps->cred)); 1591 1592 os_memcpy(wps->cred.ssid, wps->wps->ssid, wps->wps->ssid_len); 1593 wps->cred.ssid_len = wps->wps->ssid_len; 1594 1595 /* Select the best authentication and encryption type */ 1596 if (wps->auth_type & WPS_AUTH_WPA2PSK) 1597 wps->auth_type = WPS_AUTH_WPA2PSK; 1598 else if (wps->auth_type & WPS_AUTH_WPAPSK) 1599 wps->auth_type = WPS_AUTH_WPAPSK; 1600 else if (wps->auth_type & WPS_AUTH_OPEN) 1601 wps->auth_type = WPS_AUTH_OPEN; 1602 else if (wps->auth_type & WPS_AUTH_SHARED) 1603 wps->auth_type = WPS_AUTH_SHARED; 1604 else { 1605 wpa_printf(MSG_DEBUG, "WPS: Unsupported auth_type 0x%x", 1606 wps->auth_type); 1607 return -1; 1608 } 1609 wps->cred.auth_type = wps->auth_type; 1610 1611 if (wps->auth_type == WPS_AUTH_WPA2PSK || 1612 wps->auth_type == WPS_AUTH_WPAPSK) { 1613 if (wps->encr_type & WPS_ENCR_AES) 1614 wps->encr_type = WPS_ENCR_AES; 1615 else if (wps->encr_type & WPS_ENCR_TKIP) 1616 wps->encr_type = WPS_ENCR_TKIP; 1617 else { 1618 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption " 1619 "type for WPA/WPA2"); 1620 return -1; 1621 } 1622 } else { 1623 if (wps->encr_type & WPS_ENCR_WEP) 1624 wps->encr_type = WPS_ENCR_WEP; 1625 else if (wps->encr_type & WPS_ENCR_NONE) 1626 wps->encr_type = WPS_ENCR_NONE; 1627 else { 1628 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption " 1629 "type for non-WPA/WPA2 mode"); 1630 return -1; 1631 } 1632 } 1633 wps->cred.encr_type = wps->encr_type; 1634 /* 1635 * Set MAC address in the Credential to be the Enrollee's MAC address 1636 */ 1637 os_memcpy(wps->cred.mac_addr, wps->mac_addr_e, ETH_ALEN); 1638 1639 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->wps->ap && 1640 !wps->wps->registrar->disable_auto_conf) { 1641 u8 r[16]; 1642 /* Generate a random passphrase */ 1643 if (random_get_bytes(r, sizeof(r)) < 0) 1644 return -1; 1645 os_free(wps->new_psk); 1646 wps->new_psk = base64_encode(r, sizeof(r), &wps->new_psk_len); 1647 if (wps->new_psk == NULL) 1648 return -1; 1649 wps->new_psk_len--; /* remove newline */ 1650 while (wps->new_psk_len && 1651 wps->new_psk[wps->new_psk_len - 1] == '=') 1652 wps->new_psk_len--; 1653 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Generated passphrase", 1654 wps->new_psk, wps->new_psk_len); 1655 os_memcpy(wps->cred.key, wps->new_psk, wps->new_psk_len); 1656 wps->cred.key_len = wps->new_psk_len; 1657 } else if (!wps->wps->registrar->force_per_enrollee_psk && 1658 wps->use_psk_key && wps->wps->psk_set) { 1659 char hex[65]; 1660 wpa_printf(MSG_DEBUG, "WPS: Use PSK format for Network Key"); 1661 wpa_snprintf_hex(hex, sizeof(hex), wps->wps->psk, 32); 1662 os_memcpy(wps->cred.key, hex, 32 * 2); 1663 wps->cred.key_len = 32 * 2; 1664 } else if (!wps->wps->registrar->force_per_enrollee_psk && 1665 wps->wps->network_key) { 1666 os_memcpy(wps->cred.key, wps->wps->network_key, 1667 wps->wps->network_key_len); 1668 wps->cred.key_len = wps->wps->network_key_len; 1669 } else if (wps->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) { 1670 char hex[65]; 1671 /* Generate a random per-device PSK */ 1672 os_free(wps->new_psk); 1673 wps->new_psk_len = 32; 1674 wps->new_psk = os_malloc(wps->new_psk_len); 1675 if (wps->new_psk == NULL) 1676 return -1; 1677 if (random_get_bytes(wps->new_psk, wps->new_psk_len) < 0) { 1678 os_free(wps->new_psk); 1679 wps->new_psk = NULL; 1680 return -1; 1681 } 1682 wpa_hexdump_key(MSG_DEBUG, "WPS: Generated per-device PSK", 1683 wps->new_psk, wps->new_psk_len); 1684 wpa_snprintf_hex(hex, sizeof(hex), wps->new_psk, 1685 wps->new_psk_len); 1686 os_memcpy(wps->cred.key, hex, wps->new_psk_len * 2); 1687 wps->cred.key_len = wps->new_psk_len * 2; 1688 } 1689 1690use_provided: 1691#ifdef CONFIG_WPS_TESTING 1692 if (wps_testing_dummy_cred) 1693 cred = wpabuf_alloc(200); 1694 else 1695 cred = NULL; 1696 if (cred) { 1697 struct wps_credential dummy; 1698 wpa_printf(MSG_DEBUG, "WPS: Add dummy credential"); 1699 os_memset(&dummy, 0, sizeof(dummy)); 1700 os_memcpy(dummy.ssid, "dummy", 5); 1701 dummy.ssid_len = 5; 1702 dummy.auth_type = WPS_AUTH_WPA2PSK; 1703 dummy.encr_type = WPS_ENCR_AES; 1704 os_memcpy(dummy.key, "dummy psk", 9); 1705 dummy.key_len = 9; 1706 os_memcpy(dummy.mac_addr, wps->mac_addr_e, ETH_ALEN); 1707 wps_build_credential(cred, &dummy); 1708 wpa_hexdump_buf(MSG_DEBUG, "WPS: Dummy Credential", cred); 1709 1710 wpabuf_put_be16(msg, ATTR_CRED); 1711 wpabuf_put_be16(msg, wpabuf_len(cred)); 1712 wpabuf_put_buf(msg, cred); 1713 1714 wpabuf_free(cred); 1715 } 1716#endif /* CONFIG_WPS_TESTING */ 1717 1718 cred = wpabuf_alloc(200); 1719 if (cred == NULL) 1720 return -1; 1721 1722 if (wps_build_credential(cred, &wps->cred)) { 1723 wpabuf_free(cred); 1724 return -1; 1725 } 1726 1727 wpabuf_put_be16(msg, ATTR_CRED); 1728 wpabuf_put_be16(msg, wpabuf_len(cred)); 1729 wpabuf_put_buf(msg, cred); 1730 wpabuf_free(cred); 1731 1732skip_cred_build: 1733 if (wps->wps->registrar->extra_cred) { 1734 wpa_printf(MSG_DEBUG, "WPS: * Credential (pre-configured)"); 1735 wpabuf_put_buf(msg, wps->wps->registrar->extra_cred); 1736 } 1737 1738 return 0; 1739} 1740 1741 1742static int wps_build_ap_settings(struct wps_data *wps, struct wpabuf *msg) 1743{ 1744 wpa_printf(MSG_DEBUG, "WPS: * AP Settings"); 1745 1746 if (wps_build_credential(msg, &wps->cred)) 1747 return -1; 1748 1749 return 0; 1750} 1751 1752 1753static struct wpabuf * wps_build_ap_cred(struct wps_data *wps) 1754{ 1755 struct wpabuf *msg, *plain; 1756 1757 msg = wpabuf_alloc(1000); 1758 if (msg == NULL) 1759 return NULL; 1760 1761 plain = wpabuf_alloc(200); 1762 if (plain == NULL) { 1763 wpabuf_free(msg); 1764 return NULL; 1765 } 1766 1767 if (wps_build_ap_settings(wps, plain)) { 1768 wpabuf_free(plain); 1769 wpabuf_free(msg); 1770 return NULL; 1771 } 1772 1773 wpabuf_put_be16(msg, ATTR_CRED); 1774 wpabuf_put_be16(msg, wpabuf_len(plain)); 1775 wpabuf_put_buf(msg, plain); 1776 wpabuf_free(plain); 1777 1778 return msg; 1779} 1780 1781 1782static struct wpabuf * wps_build_m2(struct wps_data *wps) 1783{ 1784 struct wpabuf *msg; 1785 int config_in_m2 = 0; 1786 1787 if (random_get_bytes(wps->nonce_r, WPS_NONCE_LEN) < 0) 1788 return NULL; 1789 wpa_hexdump(MSG_DEBUG, "WPS: Registrar Nonce", 1790 wps->nonce_r, WPS_NONCE_LEN); 1791 wpa_hexdump(MSG_DEBUG, "WPS: UUID-R", wps->uuid_r, WPS_UUID_LEN); 1792 1793 wpa_printf(MSG_DEBUG, "WPS: Building Message M2"); 1794 msg = wpabuf_alloc(1000); 1795 if (msg == NULL) 1796 return NULL; 1797 1798 if (wps_build_version(msg) || 1799 wps_build_msg_type(msg, WPS_M2) || 1800 wps_build_enrollee_nonce(wps, msg) || 1801 wps_build_registrar_nonce(wps, msg) || 1802 wps_build_uuid_r(wps, msg) || 1803 wps_build_public_key(wps, msg) || 1804 wps_derive_keys(wps) || 1805 wps_build_auth_type_flags(wps, msg) || 1806 wps_build_encr_type_flags(wps, msg) || 1807 wps_build_conn_type_flags(wps, msg) || 1808 wps_build_config_methods_r(wps->wps->registrar, msg) || 1809 wps_build_device_attrs(&wps->wps->dev, msg) || 1810 wps_build_rf_bands(&wps->wps->dev, msg, 1811 wps->wps->rf_band_cb(wps->wps->cb_ctx)) || 1812 wps_build_assoc_state(wps, msg) || 1813 wps_build_config_error(msg, WPS_CFG_NO_ERROR) || 1814 wps_build_dev_password_id(msg, wps->dev_pw_id) || 1815 wps_build_os_version(&wps->wps->dev, msg) || 1816 wps_build_wfa_ext(msg, 0, NULL, 0)) { 1817 wpabuf_free(msg); 1818 return NULL; 1819 } 1820 1821#ifdef CONFIG_WPS_NFC 1822 if (wps->nfc_pw_token && wps->nfc_pw_token->pk_hash_provided_oob && 1823 wps->nfc_pw_token->pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) { 1824 /* 1825 * Use abbreviated handshake since public key hash allowed 1826 * Enrollee to validate our public key similarly to how Enrollee 1827 * public key was validated. There is no need to validate Device 1828 * Password in this case. 1829 */ 1830 struct wpabuf *plain = wpabuf_alloc(500); 1831 if (plain == NULL || 1832 wps_build_cred(wps, plain) || 1833 wps_build_key_wrap_auth(wps, plain) || 1834 wps_build_encr_settings(wps, msg, plain)) { 1835 wpabuf_free(msg); 1836 wpabuf_free(plain); 1837 return NULL; 1838 } 1839 wpabuf_free(plain); 1840 config_in_m2 = 1; 1841 } 1842#endif /* CONFIG_WPS_NFC */ 1843 1844 if (wps_build_authenticator(wps, msg)) { 1845 wpabuf_free(msg); 1846 return NULL; 1847 } 1848 1849 wps->int_reg = 1; 1850 wps->state = config_in_m2 ? RECV_DONE : RECV_M3; 1851 return msg; 1852} 1853 1854 1855static struct wpabuf * wps_build_m2d(struct wps_data *wps) 1856{ 1857 struct wpabuf *msg; 1858 u16 err = wps->config_error; 1859 1860 wpa_printf(MSG_DEBUG, "WPS: Building Message M2D"); 1861 msg = wpabuf_alloc(1000); 1862 if (msg == NULL) 1863 return NULL; 1864 1865 if (wps->wps->ap && wps->wps->ap_setup_locked && 1866 err == WPS_CFG_NO_ERROR) 1867 err = WPS_CFG_SETUP_LOCKED; 1868 1869 if (wps_build_version(msg) || 1870 wps_build_msg_type(msg, WPS_M2D) || 1871 wps_build_enrollee_nonce(wps, msg) || 1872 wps_build_registrar_nonce(wps, msg) || 1873 wps_build_uuid_r(wps, msg) || 1874 wps_build_auth_type_flags(wps, msg) || 1875 wps_build_encr_type_flags(wps, msg) || 1876 wps_build_conn_type_flags(wps, msg) || 1877 wps_build_config_methods_r(wps->wps->registrar, msg) || 1878 wps_build_device_attrs(&wps->wps->dev, msg) || 1879 wps_build_rf_bands(&wps->wps->dev, msg, 1880 wps->wps->rf_band_cb(wps->wps->cb_ctx)) || 1881 wps_build_assoc_state(wps, msg) || 1882 wps_build_config_error(msg, err) || 1883 wps_build_os_version(&wps->wps->dev, msg) || 1884 wps_build_wfa_ext(msg, 0, NULL, 0)) { 1885 wpabuf_free(msg); 1886 return NULL; 1887 } 1888 1889 wps->state = RECV_M2D_ACK; 1890 return msg; 1891} 1892 1893 1894static struct wpabuf * wps_build_m4(struct wps_data *wps) 1895{ 1896 struct wpabuf *msg, *plain; 1897 1898 wpa_printf(MSG_DEBUG, "WPS: Building Message M4"); 1899 1900 wps_derive_psk(wps, wps->dev_password, wps->dev_password_len); 1901 1902 plain = wpabuf_alloc(200); 1903 if (plain == NULL) 1904 return NULL; 1905 1906 msg = wpabuf_alloc(1000); 1907 if (msg == NULL) { 1908 wpabuf_free(plain); 1909 return NULL; 1910 } 1911 1912 if (wps_build_version(msg) || 1913 wps_build_msg_type(msg, WPS_M4) || 1914 wps_build_enrollee_nonce(wps, msg) || 1915 wps_build_r_hash(wps, msg) || 1916 wps_build_r_snonce1(wps, plain) || 1917 wps_build_key_wrap_auth(wps, plain) || 1918 wps_build_encr_settings(wps, msg, plain) || 1919 wps_build_wfa_ext(msg, 0, NULL, 0) || 1920 wps_build_authenticator(wps, msg)) { 1921 wpabuf_free(plain); 1922 wpabuf_free(msg); 1923 return NULL; 1924 } 1925 wpabuf_free(plain); 1926 1927 wps->state = RECV_M5; 1928 return msg; 1929} 1930 1931 1932static struct wpabuf * wps_build_m6(struct wps_data *wps) 1933{ 1934 struct wpabuf *msg, *plain; 1935 1936 wpa_printf(MSG_DEBUG, "WPS: Building Message M6"); 1937 1938 plain = wpabuf_alloc(200); 1939 if (plain == NULL) 1940 return NULL; 1941 1942 msg = wpabuf_alloc(1000); 1943 if (msg == NULL) { 1944 wpabuf_free(plain); 1945 return NULL; 1946 } 1947 1948 if (wps_build_version(msg) || 1949 wps_build_msg_type(msg, WPS_M6) || 1950 wps_build_enrollee_nonce(wps, msg) || 1951 wps_build_r_snonce2(wps, plain) || 1952 wps_build_key_wrap_auth(wps, plain) || 1953 wps_build_encr_settings(wps, msg, plain) || 1954 wps_build_wfa_ext(msg, 0, NULL, 0) || 1955 wps_build_authenticator(wps, msg)) { 1956 wpabuf_free(plain); 1957 wpabuf_free(msg); 1958 return NULL; 1959 } 1960 wpabuf_free(plain); 1961 1962 wps->wps_pin_revealed = 1; 1963 wps->state = RECV_M7; 1964 return msg; 1965} 1966 1967 1968static struct wpabuf * wps_build_m8(struct wps_data *wps) 1969{ 1970 struct wpabuf *msg, *plain; 1971 1972 wpa_printf(MSG_DEBUG, "WPS: Building Message M8"); 1973 1974 plain = wpabuf_alloc(500); 1975 if (plain == NULL) 1976 return NULL; 1977 1978 msg = wpabuf_alloc(1000); 1979 if (msg == NULL) { 1980 wpabuf_free(plain); 1981 return NULL; 1982 } 1983 1984 if (wps_build_version(msg) || 1985 wps_build_msg_type(msg, WPS_M8) || 1986 wps_build_enrollee_nonce(wps, msg) || 1987 ((wps->wps->ap || wps->er) && wps_build_cred(wps, plain)) || 1988 (!wps->wps->ap && !wps->er && wps_build_ap_settings(wps, plain)) || 1989 wps_build_key_wrap_auth(wps, plain) || 1990 wps_build_encr_settings(wps, msg, plain) || 1991 wps_build_wfa_ext(msg, 0, NULL, 0) || 1992 wps_build_authenticator(wps, msg)) { 1993 wpabuf_free(plain); 1994 wpabuf_free(msg); 1995 return NULL; 1996 } 1997 wpabuf_free(plain); 1998 1999 wps->state = RECV_DONE; 2000 return msg; 2001} 2002 2003 2004struct wpabuf * wps_registrar_get_msg(struct wps_data *wps, 2005 enum wsc_op_code *op_code) 2006{ 2007 struct wpabuf *msg; 2008 2009#ifdef CONFIG_WPS_UPNP 2010 if (!wps->int_reg && wps->wps->wps_upnp) { 2011 struct upnp_pending_message *p, *prev = NULL; 2012 if (wps->ext_reg > 1) 2013 wps_registrar_free_pending_m2(wps->wps); 2014 p = wps->wps->upnp_msgs; 2015 /* TODO: check pending message MAC address */ 2016 while (p && p->next) { 2017 prev = p; 2018 p = p->next; 2019 } 2020 if (p) { 2021 wpa_printf(MSG_DEBUG, "WPS: Use pending message from " 2022 "UPnP"); 2023 if (prev) 2024 prev->next = NULL; 2025 else 2026 wps->wps->upnp_msgs = NULL; 2027 msg = p->msg; 2028 switch (p->type) { 2029 case WPS_WSC_ACK: 2030 *op_code = WSC_ACK; 2031 break; 2032 case WPS_WSC_NACK: 2033 *op_code = WSC_NACK; 2034 break; 2035 default: 2036 *op_code = WSC_MSG; 2037 break; 2038 } 2039 os_free(p); 2040 if (wps->ext_reg == 0) 2041 wps->ext_reg = 1; 2042 return msg; 2043 } 2044 } 2045 if (wps->ext_reg) { 2046 wpa_printf(MSG_DEBUG, "WPS: Using external Registrar, but no " 2047 "pending message available"); 2048 return NULL; 2049 } 2050#endif /* CONFIG_WPS_UPNP */ 2051 2052 switch (wps->state) { 2053 case SEND_M2: 2054 if (wps_get_dev_password(wps) < 0) 2055 msg = wps_build_m2d(wps); 2056 else 2057 msg = wps_build_m2(wps); 2058 *op_code = WSC_MSG; 2059 break; 2060 case SEND_M2D: 2061 msg = wps_build_m2d(wps); 2062 *op_code = WSC_MSG; 2063 break; 2064 case SEND_M4: 2065 msg = wps_build_m4(wps); 2066 *op_code = WSC_MSG; 2067 break; 2068 case SEND_M6: 2069 msg = wps_build_m6(wps); 2070 *op_code = WSC_MSG; 2071 break; 2072 case SEND_M8: 2073 msg = wps_build_m8(wps); 2074 *op_code = WSC_MSG; 2075 break; 2076 case RECV_DONE: 2077 msg = wps_build_wsc_ack(wps); 2078 *op_code = WSC_ACK; 2079 break; 2080 case SEND_WSC_NACK: 2081 msg = wps_build_wsc_nack(wps); 2082 *op_code = WSC_NACK; 2083 break; 2084 default: 2085 wpa_printf(MSG_DEBUG, "WPS: Unsupported state %d for building " 2086 "a message", wps->state); 2087 msg = NULL; 2088 break; 2089 } 2090 2091 if (*op_code == WSC_MSG && msg) { 2092 /* Save a copy of the last message for Authenticator derivation 2093 */ 2094 wpabuf_free(wps->last_msg); 2095 wps->last_msg = wpabuf_dup(msg); 2096 } 2097 2098 return msg; 2099} 2100 2101 2102static int wps_process_enrollee_nonce(struct wps_data *wps, const u8 *e_nonce) 2103{ 2104 if (e_nonce == NULL) { 2105 wpa_printf(MSG_DEBUG, "WPS: No Enrollee Nonce received"); 2106 return -1; 2107 } 2108 2109 os_memcpy(wps->nonce_e, e_nonce, WPS_NONCE_LEN); 2110 wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce", 2111 wps->nonce_e, WPS_NONCE_LEN); 2112 2113 return 0; 2114} 2115 2116 2117static int wps_process_registrar_nonce(struct wps_data *wps, const u8 *r_nonce) 2118{ 2119 if (r_nonce == NULL) { 2120 wpa_printf(MSG_DEBUG, "WPS: No Registrar Nonce received"); 2121 return -1; 2122 } 2123 2124 if (os_memcmp(wps->nonce_r, r_nonce, WPS_NONCE_LEN) != 0) { 2125 wpa_printf(MSG_DEBUG, "WPS: Invalid Registrar Nonce received"); 2126 return -1; 2127 } 2128 2129 return 0; 2130} 2131 2132 2133static int wps_process_uuid_e(struct wps_data *wps, const u8 *uuid_e) 2134{ 2135 if (uuid_e == NULL) { 2136 wpa_printf(MSG_DEBUG, "WPS: No UUID-E received"); 2137 return -1; 2138 } 2139 2140 os_memcpy(wps->uuid_e, uuid_e, WPS_UUID_LEN); 2141 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", wps->uuid_e, WPS_UUID_LEN); 2142 2143 return 0; 2144} 2145 2146 2147static int wps_process_dev_password_id(struct wps_data *wps, const u8 *pw_id) 2148{ 2149 if (pw_id == NULL) { 2150 wpa_printf(MSG_DEBUG, "WPS: No Device Password ID received"); 2151 return -1; 2152 } 2153 2154 wps->dev_pw_id = WPA_GET_BE16(pw_id); 2155 wpa_printf(MSG_DEBUG, "WPS: Device Password ID %d", wps->dev_pw_id); 2156 2157 return 0; 2158} 2159 2160 2161static int wps_process_e_hash1(struct wps_data *wps, const u8 *e_hash1) 2162{ 2163 if (e_hash1 == NULL) { 2164 wpa_printf(MSG_DEBUG, "WPS: No E-Hash1 received"); 2165 return -1; 2166 } 2167 2168 os_memcpy(wps->peer_hash1, e_hash1, WPS_HASH_LEN); 2169 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash1", wps->peer_hash1, WPS_HASH_LEN); 2170 2171 return 0; 2172} 2173 2174 2175static int wps_process_e_hash2(struct wps_data *wps, const u8 *e_hash2) 2176{ 2177 if (e_hash2 == NULL) { 2178 wpa_printf(MSG_DEBUG, "WPS: No E-Hash2 received"); 2179 return -1; 2180 } 2181 2182 os_memcpy(wps->peer_hash2, e_hash2, WPS_HASH_LEN); 2183 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash2", wps->peer_hash2, WPS_HASH_LEN); 2184 2185 return 0; 2186} 2187 2188 2189static int wps_process_e_snonce1(struct wps_data *wps, const u8 *e_snonce1) 2190{ 2191 u8 hash[SHA256_MAC_LEN]; 2192 const u8 *addr[4]; 2193 size_t len[4]; 2194 2195 if (e_snonce1 == NULL) { 2196 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce1 received"); 2197 return -1; 2198 } 2199 2200 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce1", e_snonce1, 2201 WPS_SECRET_NONCE_LEN); 2202 2203 /* E-Hash1 = HMAC_AuthKey(E-S1 || PSK1 || PK_E || PK_R) */ 2204 addr[0] = e_snonce1; 2205 len[0] = WPS_SECRET_NONCE_LEN; 2206 addr[1] = wps->psk1; 2207 len[1] = WPS_PSK_LEN; 2208 addr[2] = wpabuf_head(wps->dh_pubkey_e); 2209 len[2] = wpabuf_len(wps->dh_pubkey_e); 2210 addr[3] = wpabuf_head(wps->dh_pubkey_r); 2211 len[3] = wpabuf_len(wps->dh_pubkey_r); 2212 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 2213 2214 if (os_memcmp(wps->peer_hash1, hash, WPS_HASH_LEN) != 0) { 2215 wpa_printf(MSG_DEBUG, "WPS: E-Hash1 derived from E-S1 does " 2216 "not match with the pre-committed value"); 2217 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE; 2218 wps_pwd_auth_fail_event(wps->wps, 0, 1, wps->mac_addr_e); 2219 return -1; 2220 } 2221 2222 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the first " 2223 "half of the device password"); 2224 2225 return 0; 2226} 2227 2228 2229static int wps_process_e_snonce2(struct wps_data *wps, const u8 *e_snonce2) 2230{ 2231 u8 hash[SHA256_MAC_LEN]; 2232 const u8 *addr[4]; 2233 size_t len[4]; 2234 2235 if (e_snonce2 == NULL) { 2236 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce2 received"); 2237 return -1; 2238 } 2239 2240 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce2", e_snonce2, 2241 WPS_SECRET_NONCE_LEN); 2242 2243 /* E-Hash2 = HMAC_AuthKey(E-S2 || PSK2 || PK_E || PK_R) */ 2244 addr[0] = e_snonce2; 2245 len[0] = WPS_SECRET_NONCE_LEN; 2246 addr[1] = wps->psk2; 2247 len[1] = WPS_PSK_LEN; 2248 addr[2] = wpabuf_head(wps->dh_pubkey_e); 2249 len[2] = wpabuf_len(wps->dh_pubkey_e); 2250 addr[3] = wpabuf_head(wps->dh_pubkey_r); 2251 len[3] = wpabuf_len(wps->dh_pubkey_r); 2252 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 2253 2254 if (os_memcmp(wps->peer_hash2, hash, WPS_HASH_LEN) != 0) { 2255 wpa_printf(MSG_DEBUG, "WPS: E-Hash2 derived from E-S2 does " 2256 "not match with the pre-committed value"); 2257 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e); 2258 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE; 2259 wps_pwd_auth_fail_event(wps->wps, 0, 2, wps->mac_addr_e); 2260 return -1; 2261 } 2262 2263 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the second " 2264 "half of the device password"); 2265 wps->wps_pin_revealed = 0; 2266 wps_registrar_unlock_pin(wps->wps->registrar, wps->uuid_e); 2267 2268 /* 2269 * In case wildcard PIN is used and WPS handshake succeeds in the first 2270 * attempt, wps_registrar_unlock_pin() would not free the PIN, so make 2271 * sure the PIN gets invalidated here. 2272 */ 2273 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e); 2274 2275 return 0; 2276} 2277 2278 2279static int wps_process_mac_addr(struct wps_data *wps, const u8 *mac_addr) 2280{ 2281 if (mac_addr == NULL) { 2282 wpa_printf(MSG_DEBUG, "WPS: No MAC Address received"); 2283 return -1; 2284 } 2285 2286 wpa_printf(MSG_DEBUG, "WPS: Enrollee MAC Address " MACSTR, 2287 MAC2STR(mac_addr)); 2288 os_memcpy(wps->mac_addr_e, mac_addr, ETH_ALEN); 2289 os_memcpy(wps->peer_dev.mac_addr, mac_addr, ETH_ALEN); 2290 2291 return 0; 2292} 2293 2294 2295static int wps_process_pubkey(struct wps_data *wps, const u8 *pk, 2296 size_t pk_len) 2297{ 2298 if (pk == NULL || pk_len == 0) { 2299 wpa_printf(MSG_DEBUG, "WPS: No Public Key received"); 2300 return -1; 2301 } 2302 2303 wpabuf_free(wps->dh_pubkey_e); 2304 wps->dh_pubkey_e = wpabuf_alloc_copy(pk, pk_len); 2305 if (wps->dh_pubkey_e == NULL) 2306 return -1; 2307 2308 return 0; 2309} 2310 2311 2312static int wps_process_auth_type_flags(struct wps_data *wps, const u8 *auth) 2313{ 2314 u16 auth_types; 2315 2316 if (auth == NULL) { 2317 wpa_printf(MSG_DEBUG, "WPS: No Authentication Type flags " 2318 "received"); 2319 return -1; 2320 } 2321 2322 auth_types = WPA_GET_BE16(auth); 2323 2324 wpa_printf(MSG_DEBUG, "WPS: Enrollee Authentication Type flags 0x%x", 2325 auth_types); 2326 wps->auth_type = wps->wps->auth_types & auth_types; 2327 if (wps->auth_type == 0) { 2328 wpa_printf(MSG_DEBUG, "WPS: No match in supported " 2329 "authentication types (own 0x%x Enrollee 0x%x)", 2330 wps->wps->auth_types, auth_types); 2331#ifdef WPS_WORKAROUNDS 2332 /* 2333 * Some deployed implementations seem to advertise incorrect 2334 * information in this attribute. For example, Linksys WRT350N 2335 * seems to have a byteorder bug that breaks this negotiation. 2336 * In order to interoperate with existing implementations, 2337 * assume that the Enrollee supports everything we do. 2338 */ 2339 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee " 2340 "does not advertise supported authentication types " 2341 "correctly"); 2342 wps->auth_type = wps->wps->auth_types; 2343#else /* WPS_WORKAROUNDS */ 2344 return -1; 2345#endif /* WPS_WORKAROUNDS */ 2346 } 2347 2348 return 0; 2349} 2350 2351 2352static int wps_process_encr_type_flags(struct wps_data *wps, const u8 *encr) 2353{ 2354 u16 encr_types; 2355 2356 if (encr == NULL) { 2357 wpa_printf(MSG_DEBUG, "WPS: No Encryption Type flags " 2358 "received"); 2359 return -1; 2360 } 2361 2362 encr_types = WPA_GET_BE16(encr); 2363 2364 wpa_printf(MSG_DEBUG, "WPS: Enrollee Encryption Type flags 0x%x", 2365 encr_types); 2366 wps->encr_type = wps->wps->encr_types & encr_types; 2367 if (wps->encr_type == 0) { 2368 wpa_printf(MSG_DEBUG, "WPS: No match in supported " 2369 "encryption types (own 0x%x Enrollee 0x%x)", 2370 wps->wps->encr_types, encr_types); 2371#ifdef WPS_WORKAROUNDS 2372 /* 2373 * Some deployed implementations seem to advertise incorrect 2374 * information in this attribute. For example, Linksys WRT350N 2375 * seems to have a byteorder bug that breaks this negotiation. 2376 * In order to interoperate with existing implementations, 2377 * assume that the Enrollee supports everything we do. 2378 */ 2379 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee " 2380 "does not advertise supported encryption types " 2381 "correctly"); 2382 wps->encr_type = wps->wps->encr_types; 2383#else /* WPS_WORKAROUNDS */ 2384 return -1; 2385#endif /* WPS_WORKAROUNDS */ 2386 } 2387 2388 return 0; 2389} 2390 2391 2392static int wps_process_conn_type_flags(struct wps_data *wps, const u8 *conn) 2393{ 2394 if (conn == NULL) { 2395 wpa_printf(MSG_DEBUG, "WPS: No Connection Type flags " 2396 "received"); 2397 return -1; 2398 } 2399 2400 wpa_printf(MSG_DEBUG, "WPS: Enrollee Connection Type flags 0x%x", 2401 *conn); 2402 2403 return 0; 2404} 2405 2406 2407static int wps_process_config_methods(struct wps_data *wps, const u8 *methods) 2408{ 2409 u16 m; 2410 2411 if (methods == NULL) { 2412 wpa_printf(MSG_DEBUG, "WPS: No Config Methods received"); 2413 return -1; 2414 } 2415 2416 m = WPA_GET_BE16(methods); 2417 2418 wpa_printf(MSG_DEBUG, "WPS: Enrollee Config Methods 0x%x" 2419 "%s%s%s%s%s%s%s%s%s", m, 2420 m & WPS_CONFIG_USBA ? " [USBA]" : "", 2421 m & WPS_CONFIG_ETHERNET ? " [Ethernet]" : "", 2422 m & WPS_CONFIG_LABEL ? " [Label]" : "", 2423 m & WPS_CONFIG_DISPLAY ? " [Display]" : "", 2424 m & WPS_CONFIG_EXT_NFC_TOKEN ? " [Ext NFC Token]" : "", 2425 m & WPS_CONFIG_INT_NFC_TOKEN ? " [Int NFC Token]" : "", 2426 m & WPS_CONFIG_NFC_INTERFACE ? " [NFC]" : "", 2427 m & WPS_CONFIG_PUSHBUTTON ? " [PBC]" : "", 2428 m & WPS_CONFIG_KEYPAD ? " [Keypad]" : ""); 2429 2430 if (!(m & WPS_CONFIG_DISPLAY) && !wps->use_psk_key) { 2431 /* 2432 * The Enrollee does not have a display so it is unlikely to be 2433 * able to show the passphrase to a user and as such, could 2434 * benefit from receiving PSK to reduce key derivation time. 2435 */ 2436 wpa_printf(MSG_DEBUG, "WPS: Prefer PSK format key due to " 2437 "Enrollee not supporting display"); 2438 wps->use_psk_key = 1; 2439 } 2440 2441 return 0; 2442} 2443 2444 2445static int wps_process_wps_state(struct wps_data *wps, const u8 *state) 2446{ 2447 if (state == NULL) { 2448 wpa_printf(MSG_DEBUG, "WPS: No Wi-Fi Protected Setup State " 2449 "received"); 2450 return -1; 2451 } 2452 2453 wpa_printf(MSG_DEBUG, "WPS: Enrollee Wi-Fi Protected Setup State %d", 2454 *state); 2455 2456 return 0; 2457} 2458 2459 2460static int wps_process_assoc_state(struct wps_data *wps, const u8 *assoc) 2461{ 2462 u16 a; 2463 2464 if (assoc == NULL) { 2465 wpa_printf(MSG_DEBUG, "WPS: No Association State received"); 2466 return -1; 2467 } 2468 2469 a = WPA_GET_BE16(assoc); 2470 wpa_printf(MSG_DEBUG, "WPS: Enrollee Association State %d", a); 2471 2472 return 0; 2473} 2474 2475 2476static int wps_process_config_error(struct wps_data *wps, const u8 *err) 2477{ 2478 u16 e; 2479 2480 if (err == NULL) { 2481 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error received"); 2482 return -1; 2483 } 2484 2485 e = WPA_GET_BE16(err); 2486 wpa_printf(MSG_DEBUG, "WPS: Enrollee Configuration Error %d", e); 2487 2488 return 0; 2489} 2490 2491 2492static int wps_registrar_p2p_dev_addr_match(struct wps_data *wps) 2493{ 2494#ifdef CONFIG_P2P 2495 struct wps_registrar *reg = wps->wps->registrar; 2496 2497 if (is_zero_ether_addr(reg->p2p_dev_addr)) 2498 return 1; /* no filtering in use */ 2499 2500 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) != 0) { 2501 wpa_printf(MSG_DEBUG, "WPS: No match on P2P Device Address " 2502 "filtering for PBC: expected " MACSTR " was " 2503 MACSTR " - indicate PBC session overlap", 2504 MAC2STR(reg->p2p_dev_addr), 2505 MAC2STR(wps->p2p_dev_addr)); 2506 return 0; 2507 } 2508#endif /* CONFIG_P2P */ 2509 return 1; 2510} 2511 2512 2513static int wps_registrar_skip_overlap(struct wps_data *wps) 2514{ 2515#ifdef CONFIG_P2P 2516 struct wps_registrar *reg = wps->wps->registrar; 2517 2518 if (is_zero_ether_addr(reg->p2p_dev_addr)) 2519 return 0; /* no specific Enrollee selected */ 2520 2521 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) == 0) { 2522 wpa_printf(MSG_DEBUG, "WPS: Skip PBC overlap due to selected " 2523 "Enrollee match"); 2524 return 1; 2525 } 2526#endif /* CONFIG_P2P */ 2527 return 0; 2528} 2529 2530 2531static enum wps_process_res wps_process_m1(struct wps_data *wps, 2532 struct wps_parse_attr *attr) 2533{ 2534 wpa_printf(MSG_DEBUG, "WPS: Received M1"); 2535 2536 if (wps->state != RECV_M1) { 2537 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2538 "receiving M1", wps->state); 2539 return WPS_FAILURE; 2540 } 2541 2542 if (wps_process_uuid_e(wps, attr->uuid_e) || 2543 wps_process_mac_addr(wps, attr->mac_addr) || 2544 wps_process_enrollee_nonce(wps, attr->enrollee_nonce) || 2545 wps_process_pubkey(wps, attr->public_key, attr->public_key_len) || 2546 wps_process_auth_type_flags(wps, attr->auth_type_flags) || 2547 wps_process_encr_type_flags(wps, attr->encr_type_flags) || 2548 wps_process_conn_type_flags(wps, attr->conn_type_flags) || 2549 wps_process_config_methods(wps, attr->config_methods) || 2550 wps_process_wps_state(wps, attr->wps_state) || 2551 wps_process_device_attrs(&wps->peer_dev, attr) || 2552 wps_process_rf_bands(&wps->peer_dev, attr->rf_bands) || 2553 wps_process_assoc_state(wps, attr->assoc_state) || 2554 wps_process_dev_password_id(wps, attr->dev_password_id) || 2555 wps_process_config_error(wps, attr->config_error) || 2556 wps_process_os_version(&wps->peer_dev, attr->os_version)) 2557 return WPS_FAILURE; 2558 2559 if (wps->dev_pw_id < 0x10 && 2560 wps->dev_pw_id != DEV_PW_DEFAULT && 2561 wps->dev_pw_id != DEV_PW_USER_SPECIFIED && 2562 wps->dev_pw_id != DEV_PW_MACHINE_SPECIFIED && 2563 wps->dev_pw_id != DEV_PW_REGISTRAR_SPECIFIED && 2564#ifdef CONFIG_WPS_NFC 2565 wps->dev_pw_id != DEV_PW_NFC_CONNECTION_HANDOVER && 2566#endif /* CONFIG_WPS_NFC */ 2567 (wps->dev_pw_id != DEV_PW_PUSHBUTTON || 2568 !wps->wps->registrar->pbc)) { 2569 wpa_printf(MSG_DEBUG, "WPS: Unsupported Device Password ID %d", 2570 wps->dev_pw_id); 2571 wps->state = SEND_M2D; 2572 return WPS_CONTINUE; 2573 } 2574 2575#ifdef CONFIG_WPS_NFC 2576 if (wps->dev_pw_id >= 0x10 || 2577 wps->dev_pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) { 2578 struct wps_nfc_pw_token *token; 2579 const u8 *addr[1]; 2580 u8 hash[WPS_HASH_LEN]; 2581 2582 wpa_printf(MSG_DEBUG, "WPS: Searching for NFC token match for id=%d (ctx %p registrar %p)", 2583 wps->dev_pw_id, wps->wps, wps->wps->registrar); 2584 token = wps_get_nfc_pw_token( 2585 &wps->wps->registrar->nfc_pw_tokens, wps->dev_pw_id); 2586 if (token && token->peer_pk_hash_known) { 2587 wpa_printf(MSG_DEBUG, "WPS: Found matching NFC " 2588 "Password Token"); 2589 dl_list_del(&token->list); 2590 wps->nfc_pw_token = token; 2591 2592 addr[0] = attr->public_key; 2593 sha256_vector(1, addr, &attr->public_key_len, hash); 2594 if (os_memcmp(hash, wps->nfc_pw_token->pubkey_hash, 2595 WPS_OOB_PUBKEY_HASH_LEN) != 0) { 2596 wpa_printf(MSG_ERROR, "WPS: Public Key hash " 2597 "mismatch"); 2598 wps->state = SEND_M2D; 2599 wps->config_error = 2600 WPS_CFG_PUBLIC_KEY_HASH_MISMATCH; 2601 return WPS_CONTINUE; 2602 } 2603 } else if (token) { 2604 wpa_printf(MSG_DEBUG, "WPS: Found matching NFC " 2605 "Password Token (no peer PK hash)"); 2606 wps->nfc_pw_token = token; 2607 } else if (wps->dev_pw_id >= 0x10 && 2608 wps->wps->ap_nfc_dev_pw_id == wps->dev_pw_id && 2609 wps->wps->ap_nfc_dev_pw) { 2610 wpa_printf(MSG_DEBUG, "WPS: Found match with own NFC Password Token"); 2611 } 2612 } 2613#endif /* CONFIG_WPS_NFC */ 2614 2615 if (wps->dev_pw_id == DEV_PW_PUSHBUTTON) { 2616 if ((wps->wps->registrar->force_pbc_overlap || 2617 wps_registrar_pbc_overlap(wps->wps->registrar, 2618 wps->mac_addr_e, wps->uuid_e) || 2619 !wps_registrar_p2p_dev_addr_match(wps)) && 2620 !wps_registrar_skip_overlap(wps)) { 2621 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - deny PBC " 2622 "negotiation"); 2623 wps->state = SEND_M2D; 2624 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2625 wps_pbc_overlap_event(wps->wps); 2626 wps_fail_event(wps->wps, WPS_M1, 2627 WPS_CFG_MULTIPLE_PBC_DETECTED, 2628 WPS_EI_NO_ERROR, wps->mac_addr_e); 2629 wps->wps->registrar->force_pbc_overlap = 1; 2630 return WPS_CONTINUE; 2631 } 2632 wps_registrar_add_pbc_session(wps->wps->registrar, 2633 wps->mac_addr_e, wps->uuid_e); 2634 wps->pbc = 1; 2635 } 2636 2637#ifdef WPS_WORKAROUNDS 2638 /* 2639 * It looks like Mac OS X 10.6.3 and 10.6.4 do not like Network Key in 2640 * passphrase format. To avoid interop issues, force PSK format to be 2641 * used. 2642 */ 2643 if (!wps->use_psk_key && 2644 wps->peer_dev.manufacturer && 2645 os_strncmp(wps->peer_dev.manufacturer, "Apple ", 6) == 0 && 2646 wps->peer_dev.model_name && 2647 os_strcmp(wps->peer_dev.model_name, "AirPort") == 0) { 2648 wpa_printf(MSG_DEBUG, "WPS: Workaround - Force Network Key in " 2649 "PSK format"); 2650 wps->use_psk_key = 1; 2651 } 2652#endif /* WPS_WORKAROUNDS */ 2653 2654 wps->state = SEND_M2; 2655 return WPS_CONTINUE; 2656} 2657 2658 2659static enum wps_process_res wps_process_m3(struct wps_data *wps, 2660 const struct wpabuf *msg, 2661 struct wps_parse_attr *attr) 2662{ 2663 wpa_printf(MSG_DEBUG, "WPS: Received M3"); 2664 2665 if (wps->state != RECV_M3) { 2666 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2667 "receiving M3", wps->state); 2668 wps->state = SEND_WSC_NACK; 2669 return WPS_CONTINUE; 2670 } 2671 2672 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2673 !wps_registrar_skip_overlap(wps)) { 2674 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2675 "session overlap"); 2676 wps->state = SEND_WSC_NACK; 2677 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2678 return WPS_CONTINUE; 2679 } 2680 2681 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2682 wps_process_authenticator(wps, attr->authenticator, msg) || 2683 wps_process_e_hash1(wps, attr->e_hash1) || 2684 wps_process_e_hash2(wps, attr->e_hash2)) { 2685 wps->state = SEND_WSC_NACK; 2686 return WPS_CONTINUE; 2687 } 2688 2689 wps->state = SEND_M4; 2690 return WPS_CONTINUE; 2691} 2692 2693 2694static enum wps_process_res wps_process_m5(struct wps_data *wps, 2695 const struct wpabuf *msg, 2696 struct wps_parse_attr *attr) 2697{ 2698 struct wpabuf *decrypted; 2699 struct wps_parse_attr eattr; 2700 2701 wpa_printf(MSG_DEBUG, "WPS: Received M5"); 2702 2703 if (wps->state != RECV_M5) { 2704 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2705 "receiving M5", wps->state); 2706 wps->state = SEND_WSC_NACK; 2707 return WPS_CONTINUE; 2708 } 2709 2710 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2711 !wps_registrar_skip_overlap(wps)) { 2712 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2713 "session overlap"); 2714 wps->state = SEND_WSC_NACK; 2715 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2716 return WPS_CONTINUE; 2717 } 2718 2719 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2720 wps_process_authenticator(wps, attr->authenticator, msg)) { 2721 wps->state = SEND_WSC_NACK; 2722 return WPS_CONTINUE; 2723 } 2724 2725 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings, 2726 attr->encr_settings_len); 2727 if (decrypted == NULL) { 2728 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted " 2729 "Settings attribute"); 2730 wps->state = SEND_WSC_NACK; 2731 return WPS_CONTINUE; 2732 } 2733 2734 if (wps_validate_m5_encr(decrypted, attr->version2 != NULL) < 0) { 2735 wpabuf_free(decrypted); 2736 wps->state = SEND_WSC_NACK; 2737 return WPS_CONTINUE; 2738 } 2739 2740 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings " 2741 "attribute"); 2742 if (wps_parse_msg(decrypted, &eattr) < 0 || 2743 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) || 2744 wps_process_e_snonce1(wps, eattr.e_snonce1)) { 2745 wpabuf_free(decrypted); 2746 wps->state = SEND_WSC_NACK; 2747 return WPS_CONTINUE; 2748 } 2749 wpabuf_free(decrypted); 2750 2751 wps->state = SEND_M6; 2752 return WPS_CONTINUE; 2753} 2754 2755 2756static void wps_sta_cred_cb(struct wps_data *wps) 2757{ 2758 /* 2759 * Update credential to only include a single authentication and 2760 * encryption type in case the AP configuration includes more than one 2761 * option. 2762 */ 2763 if (wps->cred.auth_type & WPS_AUTH_WPA2PSK) 2764 wps->cred.auth_type = WPS_AUTH_WPA2PSK; 2765 else if (wps->cred.auth_type & WPS_AUTH_WPAPSK) 2766 wps->cred.auth_type = WPS_AUTH_WPAPSK; 2767 if (wps->cred.encr_type & WPS_ENCR_AES) 2768 wps->cred.encr_type = WPS_ENCR_AES; 2769 else if (wps->cred.encr_type & WPS_ENCR_TKIP) 2770 wps->cred.encr_type = WPS_ENCR_TKIP; 2771 wpa_printf(MSG_DEBUG, "WPS: Update local configuration based on the " 2772 "AP configuration"); 2773 if (wps->wps->cred_cb) 2774 wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred); 2775} 2776 2777 2778static void wps_cred_update(struct wps_credential *dst, 2779 struct wps_credential *src) 2780{ 2781 os_memcpy(dst->ssid, src->ssid, sizeof(dst->ssid)); 2782 dst->ssid_len = src->ssid_len; 2783 dst->auth_type = src->auth_type; 2784 dst->encr_type = src->encr_type; 2785 dst->key_idx = src->key_idx; 2786 os_memcpy(dst->key, src->key, sizeof(dst->key)); 2787 dst->key_len = src->key_len; 2788} 2789 2790 2791static int wps_process_ap_settings_r(struct wps_data *wps, 2792 struct wps_parse_attr *attr) 2793{ 2794 struct wpabuf *msg; 2795 2796 if (wps->wps->ap || wps->er) 2797 return 0; 2798 2799 /* AP Settings Attributes in M7 when Enrollee is an AP */ 2800 if (wps_process_ap_settings(attr, &wps->cred) < 0) 2801 return -1; 2802 2803 wpa_printf(MSG_INFO, "WPS: Received old AP configuration from AP"); 2804 2805 if (wps->new_ap_settings) { 2806 wpa_printf(MSG_INFO, "WPS: Update AP configuration based on " 2807 "new settings"); 2808 wps_cred_update(&wps->cred, wps->new_ap_settings); 2809 return 0; 2810 } else { 2811 /* 2812 * Use the AP PIN only to receive the current AP settings, not 2813 * to reconfigure the AP. 2814 */ 2815 2816 /* 2817 * Clear selected registrar here since we do not get to 2818 * WSC_Done in this protocol run. 2819 */ 2820 wps_registrar_pin_completed(wps->wps->registrar); 2821 2822 msg = wps_build_ap_cred(wps); 2823 if (msg == NULL) 2824 return -1; 2825 wps->cred.cred_attr = wpabuf_head(msg); 2826 wps->cred.cred_attr_len = wpabuf_len(msg); 2827 2828 if (wps->ap_settings_cb) { 2829 wps->ap_settings_cb(wps->ap_settings_cb_ctx, 2830 &wps->cred); 2831 wpabuf_free(msg); 2832 return 1; 2833 } 2834 wps_sta_cred_cb(wps); 2835 2836 wps->cred.cred_attr = NULL; 2837 wps->cred.cred_attr_len = 0; 2838 wpabuf_free(msg); 2839 2840 return 1; 2841 } 2842} 2843 2844 2845static enum wps_process_res wps_process_m7(struct wps_data *wps, 2846 const struct wpabuf *msg, 2847 struct wps_parse_attr *attr) 2848{ 2849 struct wpabuf *decrypted; 2850 struct wps_parse_attr eattr; 2851 2852 wpa_printf(MSG_DEBUG, "WPS: Received M7"); 2853 2854 if (wps->state != RECV_M7) { 2855 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2856 "receiving M7", wps->state); 2857 wps->state = SEND_WSC_NACK; 2858 return WPS_CONTINUE; 2859 } 2860 2861 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2862 !wps_registrar_skip_overlap(wps)) { 2863 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2864 "session overlap"); 2865 wps->state = SEND_WSC_NACK; 2866 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2867 return WPS_CONTINUE; 2868 } 2869 2870 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2871 wps_process_authenticator(wps, attr->authenticator, msg)) { 2872 wps->state = SEND_WSC_NACK; 2873 return WPS_CONTINUE; 2874 } 2875 2876 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings, 2877 attr->encr_settings_len); 2878 if (decrypted == NULL) { 2879 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypt Encrypted " 2880 "Settings attribute"); 2881 wps->state = SEND_WSC_NACK; 2882 return WPS_CONTINUE; 2883 } 2884 2885 if (wps_validate_m7_encr(decrypted, wps->wps->ap || wps->er, 2886 attr->version2 != NULL) < 0) { 2887 wpabuf_free(decrypted); 2888 wps->state = SEND_WSC_NACK; 2889 return WPS_CONTINUE; 2890 } 2891 2892 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings " 2893 "attribute"); 2894 if (wps_parse_msg(decrypted, &eattr) < 0 || 2895 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) || 2896 wps_process_e_snonce2(wps, eattr.e_snonce2) || 2897 wps_process_ap_settings_r(wps, &eattr)) { 2898 wpabuf_free(decrypted); 2899 wps->state = SEND_WSC_NACK; 2900 return WPS_CONTINUE; 2901 } 2902 2903 wpabuf_free(decrypted); 2904 2905 wps->state = SEND_M8; 2906 return WPS_CONTINUE; 2907} 2908 2909 2910static enum wps_process_res wps_process_wsc_msg(struct wps_data *wps, 2911 const struct wpabuf *msg) 2912{ 2913 struct wps_parse_attr attr; 2914 enum wps_process_res ret = WPS_CONTINUE; 2915 2916 wpa_printf(MSG_DEBUG, "WPS: Received WSC_MSG"); 2917 2918 if (wps_parse_msg(msg, &attr) < 0) 2919 return WPS_FAILURE; 2920 2921 if (attr.msg_type == NULL) { 2922 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 2923 wps->state = SEND_WSC_NACK; 2924 return WPS_CONTINUE; 2925 } 2926 2927 if (*attr.msg_type != WPS_M1 && 2928 (attr.registrar_nonce == NULL || 2929 os_memcmp(wps->nonce_r, attr.registrar_nonce, 2930 WPS_NONCE_LEN) != 0)) { 2931 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 2932 return WPS_FAILURE; 2933 } 2934 2935 switch (*attr.msg_type) { 2936 case WPS_M1: 2937 if (wps_validate_m1(msg) < 0) 2938 return WPS_FAILURE; 2939#ifdef CONFIG_WPS_UPNP 2940 if (wps->wps->wps_upnp && attr.mac_addr) { 2941 /* Remove old pending messages when starting new run */ 2942 wps_free_pending_msgs(wps->wps->upnp_msgs); 2943 wps->wps->upnp_msgs = NULL; 2944 2945 upnp_wps_device_send_wlan_event( 2946 wps->wps->wps_upnp, attr.mac_addr, 2947 UPNP_WPS_WLANEVENT_TYPE_EAP, msg); 2948 } 2949#endif /* CONFIG_WPS_UPNP */ 2950 ret = wps_process_m1(wps, &attr); 2951 break; 2952 case WPS_M3: 2953 if (wps_validate_m3(msg) < 0) 2954 return WPS_FAILURE; 2955 ret = wps_process_m3(wps, msg, &attr); 2956 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 2957 wps_fail_event(wps->wps, WPS_M3, wps->config_error, 2958 wps->error_indication, wps->mac_addr_e); 2959 break; 2960 case WPS_M5: 2961 if (wps_validate_m5(msg) < 0) 2962 return WPS_FAILURE; 2963 ret = wps_process_m5(wps, msg, &attr); 2964 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 2965 wps_fail_event(wps->wps, WPS_M5, wps->config_error, 2966 wps->error_indication, wps->mac_addr_e); 2967 break; 2968 case WPS_M7: 2969 if (wps_validate_m7(msg) < 0) 2970 return WPS_FAILURE; 2971 ret = wps_process_m7(wps, msg, &attr); 2972 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 2973 wps_fail_event(wps->wps, WPS_M7, wps->config_error, 2974 wps->error_indication, wps->mac_addr_e); 2975 break; 2976 default: 2977 wpa_printf(MSG_DEBUG, "WPS: Unsupported Message Type %d", 2978 *attr.msg_type); 2979 return WPS_FAILURE; 2980 } 2981 2982 if (ret == WPS_CONTINUE) { 2983 /* Save a copy of the last message for Authenticator derivation 2984 */ 2985 wpabuf_free(wps->last_msg); 2986 wps->last_msg = wpabuf_dup(msg); 2987 } 2988 2989 return ret; 2990} 2991 2992 2993static enum wps_process_res wps_process_wsc_ack(struct wps_data *wps, 2994 const struct wpabuf *msg) 2995{ 2996 struct wps_parse_attr attr; 2997 2998 wpa_printf(MSG_DEBUG, "WPS: Received WSC_ACK"); 2999 3000 if (wps_parse_msg(msg, &attr) < 0) 3001 return WPS_FAILURE; 3002 3003 if (attr.msg_type == NULL) { 3004 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3005 return WPS_FAILURE; 3006 } 3007 3008 if (*attr.msg_type != WPS_WSC_ACK) { 3009 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 3010 *attr.msg_type); 3011 return WPS_FAILURE; 3012 } 3013 3014#ifdef CONFIG_WPS_UPNP 3015 if (wps->wps->wps_upnp && wps->ext_reg && wps->state == RECV_M2D_ACK && 3016 upnp_wps_subscribers(wps->wps->wps_upnp)) { 3017 if (wps->wps->upnp_msgs) 3018 return WPS_CONTINUE; 3019 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an " 3020 "external Registrar"); 3021 return WPS_PENDING; 3022 } 3023#endif /* CONFIG_WPS_UPNP */ 3024 3025 if (attr.registrar_nonce == NULL || 3026 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 3027 { 3028 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3029 return WPS_FAILURE; 3030 } 3031 3032 if (attr.enrollee_nonce == NULL || 3033 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 3034 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 3035 return WPS_FAILURE; 3036 } 3037 3038 if (wps->state == RECV_M2D_ACK) { 3039#ifdef CONFIG_WPS_UPNP 3040 if (wps->wps->wps_upnp && 3041 upnp_wps_subscribers(wps->wps->wps_upnp)) { 3042 if (wps->wps->upnp_msgs) 3043 return WPS_CONTINUE; 3044 if (wps->ext_reg == 0) 3045 wps->ext_reg = 1; 3046 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an " 3047 "external Registrar"); 3048 return WPS_PENDING; 3049 } 3050#endif /* CONFIG_WPS_UPNP */ 3051 3052 wpa_printf(MSG_DEBUG, "WPS: No more registrars available - " 3053 "terminate negotiation"); 3054 } 3055 3056 return WPS_FAILURE; 3057} 3058 3059 3060static enum wps_process_res wps_process_wsc_nack(struct wps_data *wps, 3061 const struct wpabuf *msg) 3062{ 3063 struct wps_parse_attr attr; 3064 int old_state; 3065 u16 config_error; 3066 3067 wpa_printf(MSG_DEBUG, "WPS: Received WSC_NACK"); 3068 3069 old_state = wps->state; 3070 wps->state = SEND_WSC_NACK; 3071 3072 if (wps_parse_msg(msg, &attr) < 0) 3073 return WPS_FAILURE; 3074 3075 if (attr.msg_type == NULL) { 3076 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3077 return WPS_FAILURE; 3078 } 3079 3080 if (*attr.msg_type != WPS_WSC_NACK) { 3081 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 3082 *attr.msg_type); 3083 return WPS_FAILURE; 3084 } 3085 3086#ifdef CONFIG_WPS_UPNP 3087 if (wps->wps->wps_upnp && wps->ext_reg) { 3088 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external " 3089 "Registrar terminated by the Enrollee"); 3090 return WPS_FAILURE; 3091 } 3092#endif /* CONFIG_WPS_UPNP */ 3093 3094 if (attr.registrar_nonce == NULL || 3095 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 3096 { 3097 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3098 return WPS_FAILURE; 3099 } 3100 3101 if (attr.enrollee_nonce == NULL || 3102 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 3103 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 3104 return WPS_FAILURE; 3105 } 3106 3107 if (attr.config_error == NULL) { 3108 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error attribute " 3109 "in WSC_NACK"); 3110 return WPS_FAILURE; 3111 } 3112 3113 config_error = WPA_GET_BE16(attr.config_error); 3114 wpa_printf(MSG_DEBUG, "WPS: Enrollee terminated negotiation with " 3115 "Configuration Error %d", config_error); 3116 3117 switch (old_state) { 3118 case RECV_M3: 3119 wps_fail_event(wps->wps, WPS_M2, config_error, 3120 wps->error_indication, wps->mac_addr_e); 3121 break; 3122 case RECV_M5: 3123 wps_fail_event(wps->wps, WPS_M4, config_error, 3124 wps->error_indication, wps->mac_addr_e); 3125 break; 3126 case RECV_M7: 3127 wps_fail_event(wps->wps, WPS_M6, config_error, 3128 wps->error_indication, wps->mac_addr_e); 3129 break; 3130 case RECV_DONE: 3131 wps_fail_event(wps->wps, WPS_M8, config_error, 3132 wps->error_indication, wps->mac_addr_e); 3133 break; 3134 default: 3135 break; 3136 } 3137 3138 return WPS_FAILURE; 3139} 3140 3141 3142static enum wps_process_res wps_process_wsc_done(struct wps_data *wps, 3143 const struct wpabuf *msg) 3144{ 3145 struct wps_parse_attr attr; 3146 3147 wpa_printf(MSG_DEBUG, "WPS: Received WSC_Done"); 3148 3149 if (wps->state != RECV_DONE && 3150 (!wps->wps->wps_upnp || !wps->ext_reg)) { 3151 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 3152 "receiving WSC_Done", wps->state); 3153 return WPS_FAILURE; 3154 } 3155 3156 if (wps_parse_msg(msg, &attr) < 0) 3157 return WPS_FAILURE; 3158 3159 if (attr.msg_type == NULL) { 3160 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3161 return WPS_FAILURE; 3162 } 3163 3164 if (*attr.msg_type != WPS_WSC_DONE) { 3165 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 3166 *attr.msg_type); 3167 return WPS_FAILURE; 3168 } 3169 3170#ifdef CONFIG_WPS_UPNP 3171 if (wps->wps->wps_upnp && wps->ext_reg) { 3172 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external " 3173 "Registrar completed successfully"); 3174 wps_device_store(wps->wps->registrar, &wps->peer_dev, 3175 wps->uuid_e); 3176 return WPS_DONE; 3177 } 3178#endif /* CONFIG_WPS_UPNP */ 3179 3180 if (attr.registrar_nonce == NULL || 3181 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 3182 { 3183 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3184 return WPS_FAILURE; 3185 } 3186 3187 if (attr.enrollee_nonce == NULL || 3188 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 3189 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 3190 return WPS_FAILURE; 3191 } 3192 3193 wpa_printf(MSG_DEBUG, "WPS: Negotiation completed successfully"); 3194 wps_device_store(wps->wps->registrar, &wps->peer_dev, 3195 wps->uuid_e); 3196 3197 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->new_psk && 3198 wps->wps->ap && !wps->wps->registrar->disable_auto_conf) { 3199 struct wps_credential cred; 3200 3201 wpa_printf(MSG_DEBUG, "WPS: Moving to Configured state based " 3202 "on first Enrollee connection"); 3203 3204 os_memset(&cred, 0, sizeof(cred)); 3205 os_memcpy(cred.ssid, wps->wps->ssid, wps->wps->ssid_len); 3206 cred.ssid_len = wps->wps->ssid_len; 3207 cred.auth_type = WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK; 3208 cred.encr_type = WPS_ENCR_TKIP | WPS_ENCR_AES; 3209 os_memcpy(cred.key, wps->new_psk, wps->new_psk_len); 3210 cred.key_len = wps->new_psk_len; 3211 3212 wps->wps->wps_state = WPS_STATE_CONFIGURED; 3213 wpa_hexdump_ascii_key(MSG_DEBUG, 3214 "WPS: Generated random passphrase", 3215 wps->new_psk, wps->new_psk_len); 3216 if (wps->wps->cred_cb) 3217 wps->wps->cred_cb(wps->wps->cb_ctx, &cred); 3218 3219 os_free(wps->new_psk); 3220 wps->new_psk = NULL; 3221 } 3222 3223 if (!wps->wps->ap && !wps->er) 3224 wps_sta_cred_cb(wps); 3225 3226 if (wps->new_psk) { 3227 if (wps_cb_new_psk(wps->wps->registrar, wps->mac_addr_e, 3228 wps->p2p_dev_addr, wps->new_psk, 3229 wps->new_psk_len)) { 3230 wpa_printf(MSG_DEBUG, "WPS: Failed to configure the " 3231 "new PSK"); 3232 } 3233 os_free(wps->new_psk); 3234 wps->new_psk = NULL; 3235 } 3236 3237 wps_cb_reg_success(wps->wps->registrar, wps->mac_addr_e, wps->uuid_e, 3238 wps->dev_password, wps->dev_password_len); 3239 3240 if (wps->pbc) { 3241 wps_registrar_remove_pbc_session(wps->wps->registrar, 3242 wps->uuid_e, 3243 wps->p2p_dev_addr); 3244 wps_registrar_pbc_completed(wps->wps->registrar); 3245#ifdef WPS_WORKAROUNDS 3246 os_get_reltime(&wps->wps->registrar->pbc_ignore_start); 3247#endif /* WPS_WORKAROUNDS */ 3248 os_memcpy(wps->wps->registrar->pbc_ignore_uuid, wps->uuid_e, 3249 WPS_UUID_LEN); 3250 } else { 3251 wps_registrar_pin_completed(wps->wps->registrar); 3252 } 3253 /* TODO: maintain AuthorizedMACs somewhere separately for each ER and 3254 * merge them into APs own list.. */ 3255 3256 wps_success_event(wps->wps, wps->mac_addr_e); 3257 3258 return WPS_DONE; 3259} 3260 3261 3262enum wps_process_res wps_registrar_process_msg(struct wps_data *wps, 3263 enum wsc_op_code op_code, 3264 const struct wpabuf *msg) 3265{ 3266 enum wps_process_res ret; 3267 3268 wpa_printf(MSG_DEBUG, "WPS: Processing received message (len=%lu " 3269 "op_code=%d)", 3270 (unsigned long) wpabuf_len(msg), op_code); 3271 3272#ifdef CONFIG_WPS_UPNP 3273 if (wps->wps->wps_upnp && op_code == WSC_MSG && wps->ext_reg == 1) { 3274 struct wps_parse_attr attr; 3275 if (wps_parse_msg(msg, &attr) == 0 && attr.msg_type && 3276 *attr.msg_type == WPS_M3) 3277 wps->ext_reg = 2; /* past M2/M2D phase */ 3278 } 3279 if (wps->ext_reg > 1) 3280 wps_registrar_free_pending_m2(wps->wps); 3281 if (wps->wps->wps_upnp && wps->ext_reg && 3282 wps->wps->upnp_msgs == NULL && 3283 (op_code == WSC_MSG || op_code == WSC_Done || op_code == WSC_NACK)) 3284 { 3285 struct wps_parse_attr attr; 3286 int type; 3287 if (wps_parse_msg(msg, &attr) < 0 || attr.msg_type == NULL) 3288 type = -1; 3289 else 3290 type = *attr.msg_type; 3291 wpa_printf(MSG_DEBUG, "WPS: Sending received message (type %d)" 3292 " to external Registrar for processing", type); 3293 upnp_wps_device_send_wlan_event(wps->wps->wps_upnp, 3294 wps->mac_addr_e, 3295 UPNP_WPS_WLANEVENT_TYPE_EAP, 3296 msg); 3297 if (op_code == WSC_MSG) 3298 return WPS_PENDING; 3299 } else if (wps->wps->wps_upnp && wps->ext_reg && op_code == WSC_MSG) { 3300 wpa_printf(MSG_DEBUG, "WPS: Skip internal processing - using " 3301 "external Registrar"); 3302 return WPS_CONTINUE; 3303 } 3304#endif /* CONFIG_WPS_UPNP */ 3305 3306 switch (op_code) { 3307 case WSC_MSG: 3308 return wps_process_wsc_msg(wps, msg); 3309 case WSC_ACK: 3310 if (wps_validate_wsc_ack(msg) < 0) 3311 return WPS_FAILURE; 3312 return wps_process_wsc_ack(wps, msg); 3313 case WSC_NACK: 3314 if (wps_validate_wsc_nack(msg) < 0) 3315 return WPS_FAILURE; 3316 return wps_process_wsc_nack(wps, msg); 3317 case WSC_Done: 3318 if (wps_validate_wsc_done(msg) < 0) 3319 return WPS_FAILURE; 3320 ret = wps_process_wsc_done(wps, msg); 3321 if (ret == WPS_FAILURE) { 3322 wps->state = SEND_WSC_NACK; 3323 wps_fail_event(wps->wps, WPS_WSC_DONE, 3324 wps->config_error, 3325 wps->error_indication, wps->mac_addr_e); 3326 } 3327 return ret; 3328 default: 3329 wpa_printf(MSG_DEBUG, "WPS: Unsupported op_code %d", op_code); 3330 return WPS_FAILURE; 3331 } 3332} 3333 3334 3335int wps_registrar_update_ie(struct wps_registrar *reg) 3336{ 3337 return wps_set_ie(reg); 3338} 3339 3340 3341static void wps_registrar_set_selected_timeout(void *eloop_ctx, 3342 void *timeout_ctx) 3343{ 3344 struct wps_registrar *reg = eloop_ctx; 3345 3346 wpa_printf(MSG_DEBUG, "WPS: Selected Registrar timeout - " 3347 "unselect internal Registrar"); 3348 reg->selected_registrar = 0; 3349 reg->pbc = 0; 3350 wps_registrar_selected_registrar_changed(reg, 0); 3351} 3352 3353 3354#ifdef CONFIG_WPS_UPNP 3355static void wps_registrar_sel_reg_add(struct wps_registrar *reg, 3356 struct subscription *s) 3357{ 3358 int i, j; 3359 wpa_printf(MSG_DEBUG, "WPS: External Registrar selected (dev_pw_id=%d " 3360 "config_methods=0x%x)", 3361 s->dev_password_id, s->config_methods); 3362 reg->sel_reg_union = 1; 3363 if (reg->sel_reg_dev_password_id_override != DEV_PW_PUSHBUTTON) 3364 reg->sel_reg_dev_password_id_override = s->dev_password_id; 3365 if (reg->sel_reg_config_methods_override == -1) 3366 reg->sel_reg_config_methods_override = 0; 3367 reg->sel_reg_config_methods_override |= s->config_methods; 3368 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) 3369 if (is_zero_ether_addr(reg->authorized_macs_union[i])) 3370 break; 3371 for (j = 0; i < WPS_MAX_AUTHORIZED_MACS && j < WPS_MAX_AUTHORIZED_MACS; 3372 j++) { 3373 if (is_zero_ether_addr(s->authorized_macs[j])) 3374 break; 3375 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC into union: " 3376 MACSTR, MAC2STR(s->authorized_macs[j])); 3377 os_memcpy(reg->authorized_macs_union[i], 3378 s->authorized_macs[j], ETH_ALEN); 3379 i++; 3380 } 3381 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union", 3382 (u8 *) reg->authorized_macs_union, 3383 sizeof(reg->authorized_macs_union)); 3384} 3385#endif /* CONFIG_WPS_UPNP */ 3386 3387 3388static void wps_registrar_sel_reg_union(struct wps_registrar *reg) 3389{ 3390#ifdef CONFIG_WPS_UPNP 3391 struct subscription *s; 3392 3393 if (reg->wps->wps_upnp == NULL) 3394 return; 3395 3396 dl_list_for_each(s, ®->wps->wps_upnp->subscriptions, 3397 struct subscription, list) { 3398 struct subscr_addr *sa; 3399 sa = dl_list_first(&s->addr_list, struct subscr_addr, list); 3400 if (sa) { 3401 wpa_printf(MSG_DEBUG, "WPS: External Registrar %s:%d", 3402 inet_ntoa(sa->saddr.sin_addr), 3403 ntohs(sa->saddr.sin_port)); 3404 } 3405 if (s->selected_registrar) 3406 wps_registrar_sel_reg_add(reg, s); 3407 else 3408 wpa_printf(MSG_DEBUG, "WPS: External Registrar not " 3409 "selected"); 3410 } 3411#endif /* CONFIG_WPS_UPNP */ 3412} 3413 3414 3415/** 3416 * wps_registrar_selected_registrar_changed - SetSelectedRegistrar change 3417 * @reg: Registrar data from wps_registrar_init() 3418 * 3419 * This function is called when selected registrar state changes, e.g., when an 3420 * AP receives a SetSelectedRegistrar UPnP message. 3421 */ 3422void wps_registrar_selected_registrar_changed(struct wps_registrar *reg, 3423 u16 dev_pw_id) 3424{ 3425 wpa_printf(MSG_DEBUG, "WPS: Selected registrar information changed"); 3426 3427 reg->sel_reg_union = reg->selected_registrar; 3428 reg->sel_reg_dev_password_id_override = -1; 3429 reg->sel_reg_config_methods_override = -1; 3430 os_memcpy(reg->authorized_macs_union, reg->authorized_macs, 3431 WPS_MAX_AUTHORIZED_MACS * ETH_ALEN); 3432 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union (start with own)", 3433 (u8 *) reg->authorized_macs_union, 3434 sizeof(reg->authorized_macs_union)); 3435 if (reg->selected_registrar) { 3436 u16 methods; 3437 3438 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 3439 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 3440 WPS_CONFIG_PHY_PUSHBUTTON); 3441 if (reg->pbc) { 3442 reg->sel_reg_dev_password_id_override = 3443 DEV_PW_PUSHBUTTON; 3444 wps_set_pushbutton(&methods, reg->wps->config_methods); 3445 } else if (dev_pw_id) 3446 reg->sel_reg_dev_password_id_override = dev_pw_id; 3447 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar selected " 3448 "(pbc=%d)", reg->pbc); 3449 reg->sel_reg_config_methods_override = methods; 3450 } else 3451 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar not selected"); 3452 3453 wps_registrar_sel_reg_union(reg); 3454 3455 wps_set_ie(reg); 3456 wps_cb_set_sel_reg(reg); 3457} 3458 3459 3460int wps_registrar_get_info(struct wps_registrar *reg, const u8 *addr, 3461 char *buf, size_t buflen) 3462{ 3463 struct wps_registrar_device *d; 3464 int len = 0, ret; 3465 char uuid[40]; 3466 char devtype[WPS_DEV_TYPE_BUFSIZE]; 3467 3468 d = wps_device_get(reg, addr); 3469 if (d == NULL) 3470 return 0; 3471 if (uuid_bin2str(d->uuid, uuid, sizeof(uuid))) 3472 return 0; 3473 3474 ret = os_snprintf(buf + len, buflen - len, 3475 "wpsUuid=%s\n" 3476 "wpsPrimaryDeviceType=%s\n" 3477 "wpsDeviceName=%s\n" 3478 "wpsManufacturer=%s\n" 3479 "wpsModelName=%s\n" 3480 "wpsModelNumber=%s\n" 3481 "wpsSerialNumber=%s\n", 3482 uuid, 3483 wps_dev_type_bin2str(d->dev.pri_dev_type, devtype, 3484 sizeof(devtype)), 3485 d->dev.device_name ? d->dev.device_name : "", 3486 d->dev.manufacturer ? d->dev.manufacturer : "", 3487 d->dev.model_name ? d->dev.model_name : "", 3488 d->dev.model_number ? d->dev.model_number : "", 3489 d->dev.serial_number ? d->dev.serial_number : ""); 3490 if (ret < 0 || (size_t) ret >= buflen - len) 3491 return len; 3492 len += ret; 3493 3494 return len; 3495} 3496 3497 3498int wps_registrar_config_ap(struct wps_registrar *reg, 3499 struct wps_credential *cred) 3500{ 3501 wpa_printf(MSG_DEBUG, "WPS: encr_type=0x%x", cred->encr_type); 3502 if (!(cred->encr_type & (WPS_ENCR_NONE | WPS_ENCR_TKIP | 3503 WPS_ENCR_AES))) { 3504 if (cred->encr_type & WPS_ENCR_WEP) { 3505 wpa_printf(MSG_INFO, "WPS: Reject new AP settings " 3506 "due to WEP configuration"); 3507 return -1; 3508 } 3509 3510 wpa_printf(MSG_INFO, "WPS: Reject new AP settings due to " 3511 "invalid encr_type 0x%x", cred->encr_type); 3512 return -1; 3513 } 3514 3515 if ((cred->encr_type & (WPS_ENCR_TKIP | WPS_ENCR_AES)) == 3516 WPS_ENCR_TKIP) { 3517 wpa_printf(MSG_DEBUG, "WPS: Upgrade encr_type TKIP -> " 3518 "TKIP+AES"); 3519 cred->encr_type |= WPS_ENCR_AES; 3520 } 3521 3522 if ((cred->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) == 3523 WPS_AUTH_WPAPSK) { 3524 wpa_printf(MSG_DEBUG, "WPS: Upgrade auth_type WPAPSK -> " 3525 "WPAPSK+WPA2PSK"); 3526 cred->auth_type |= WPS_AUTH_WPA2PSK; 3527 } 3528 3529 if (reg->wps->cred_cb) 3530 return reg->wps->cred_cb(reg->wps->cb_ctx, cred); 3531 3532 return -1; 3533} 3534 3535 3536#ifdef CONFIG_WPS_NFC 3537 3538int wps_registrar_add_nfc_pw_token(struct wps_registrar *reg, 3539 const u8 *pubkey_hash, u16 pw_id, 3540 const u8 *dev_pw, size_t dev_pw_len, 3541 int pk_hash_provided_oob) 3542{ 3543 struct wps_nfc_pw_token *token; 3544 3545 if (dev_pw_len > WPS_OOB_DEVICE_PASSWORD_LEN) 3546 return -1; 3547 3548 if (pw_id == DEV_PW_NFC_CONNECTION_HANDOVER && 3549 (pubkey_hash == NULL || !pk_hash_provided_oob)) { 3550 wpa_printf(MSG_DEBUG, "WPS: Unexpected NFC Password Token " 3551 "addition - missing public key hash"); 3552 return -1; 3553 } 3554 3555 wps_free_nfc_pw_tokens(®->nfc_pw_tokens, pw_id); 3556 3557 token = os_zalloc(sizeof(*token)); 3558 if (token == NULL) 3559 return -1; 3560 3561 token->peer_pk_hash_known = pubkey_hash != NULL; 3562 if (pubkey_hash) 3563 os_memcpy(token->pubkey_hash, pubkey_hash, 3564 WPS_OOB_PUBKEY_HASH_LEN); 3565 token->pw_id = pw_id; 3566 token->pk_hash_provided_oob = pk_hash_provided_oob; 3567 if (dev_pw) { 3568 wpa_snprintf_hex_uppercase((char *) token->dev_pw, 3569 sizeof(token->dev_pw), 3570 dev_pw, dev_pw_len); 3571 token->dev_pw_len = dev_pw_len * 2; 3572 } 3573 3574 dl_list_add(®->nfc_pw_tokens, &token->list); 3575 3576 reg->selected_registrar = 1; 3577 reg->pbc = 0; 3578 wps_registrar_add_authorized_mac(reg, 3579 (u8 *) "\xff\xff\xff\xff\xff\xff"); 3580 wps_registrar_selected_registrar_changed(reg, pw_id); 3581 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 3582 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, 3583 wps_registrar_set_selected_timeout, 3584 reg, NULL); 3585 3586 wpa_printf(MSG_DEBUG, "WPS: Added NFC Device Password %u to Registrar", 3587 pw_id); 3588 3589 return 0; 3590} 3591 3592 3593int wps_registrar_add_nfc_password_token(struct wps_registrar *reg, 3594 const u8 *oob_dev_pw, 3595 size_t oob_dev_pw_len) 3596{ 3597 const u8 *pos, *hash, *dev_pw; 3598 u16 id; 3599 size_t dev_pw_len; 3600 3601 if (oob_dev_pw_len < WPS_OOB_PUBKEY_HASH_LEN + 2 || 3602 oob_dev_pw_len > WPS_OOB_PUBKEY_HASH_LEN + 2 + 3603 WPS_OOB_DEVICE_PASSWORD_LEN) 3604 return -1; 3605 3606 hash = oob_dev_pw; 3607 pos = oob_dev_pw + WPS_OOB_PUBKEY_HASH_LEN; 3608 id = WPA_GET_BE16(pos); 3609 dev_pw = pos + 2; 3610 dev_pw_len = oob_dev_pw + oob_dev_pw_len - dev_pw; 3611 3612 wpa_printf(MSG_DEBUG, "WPS: Add NFC Password Token for Password ID %u", 3613 id); 3614 3615 wpa_hexdump(MSG_DEBUG, "WPS: Public Key Hash", 3616 hash, WPS_OOB_PUBKEY_HASH_LEN); 3617 wpa_hexdump_key(MSG_DEBUG, "WPS: Device Password", dev_pw, dev_pw_len); 3618 3619 return wps_registrar_add_nfc_pw_token(reg, hash, id, dev_pw, 3620 dev_pw_len, 0); 3621} 3622 3623 3624void wps_registrar_remove_nfc_pw_token(struct wps_registrar *reg, 3625 struct wps_nfc_pw_token *token) 3626{ 3627 wps_registrar_remove_authorized_mac(reg, 3628 (u8 *) "\xff\xff\xff\xff\xff\xff"); 3629 wps_registrar_selected_registrar_changed(reg, 0); 3630 3631 /* 3632 * Free the NFC password token if it was used only for a single protocol 3633 * run. The static handover case uses the same password token multiple 3634 * times, so do not free that case here. 3635 */ 3636 if (token->peer_pk_hash_known) 3637 os_free(token); 3638} 3639 3640#endif /* CONFIG_WPS_NFC */ 3641