1/* 2 * Wi-Fi Protected Setup - Registrar 3 * Copyright (c) 2008-2016, Jouni Malinen <j@w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9#include "utils/includes.h" 10 11#include "utils/common.h" 12#include "utils/base64.h" 13#include "utils/eloop.h" 14#include "utils/uuid.h" 15#include "utils/list.h" 16#include "crypto/crypto.h" 17#include "crypto/sha256.h" 18#include "crypto/random.h" 19#include "common/ieee802_11_defs.h" 20#include "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 bin_clear_free(token, sizeof(*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 bin_clear_free(pin->pin, pin->pin_len); 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 679void wps_registrar_flush(struct wps_registrar *reg) 680{ 681 if (reg == NULL) 682 return; 683 wps_free_pins(®->pins); 684 wps_free_nfc_pw_tokens(®->nfc_pw_tokens, 0); 685 wps_free_pbc_sessions(reg->pbc_sessions); 686 reg->pbc_sessions = NULL; 687 wps_free_devices(reg->devices); 688 reg->devices = NULL; 689#ifdef WPS_WORKAROUNDS 690 reg->pbc_ignore_start.sec = 0; 691#endif /* WPS_WORKAROUNDS */ 692} 693 694 695/** 696 * wps_registrar_deinit - Deinitialize WPS Registrar data 697 * @reg: Registrar data from wps_registrar_init() 698 */ 699void wps_registrar_deinit(struct wps_registrar *reg) 700{ 701 if (reg == NULL) 702 return; 703 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 704 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 705 wps_registrar_flush(reg); 706 wpabuf_free(reg->extra_cred); 707 os_free(reg); 708} 709 710 711static void wps_registrar_invalidate_unused(struct wps_registrar *reg) 712{ 713 struct wps_uuid_pin *pin; 714 715 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 716 if (pin->wildcard_uuid == 1 && !(pin->flags & PIN_LOCKED)) { 717 wpa_printf(MSG_DEBUG, "WPS: Invalidate previously " 718 "configured wildcard PIN"); 719 wps_registrar_remove_pin(reg, pin); 720 break; 721 } 722 } 723} 724 725 726/** 727 * wps_registrar_add_pin - Configure a new PIN for Registrar 728 * @reg: Registrar data from wps_registrar_init() 729 * @addr: Enrollee MAC address or %NULL if not known 730 * @uuid: UUID-E or %NULL for wildcard (any UUID) 731 * @pin: PIN (Device Password) 732 * @pin_len: Length of pin in octets 733 * @timeout: Time (in seconds) when the PIN will be invalidated; 0 = no timeout 734 * Returns: 0 on success, -1 on failure 735 */ 736int wps_registrar_add_pin(struct wps_registrar *reg, const u8 *addr, 737 const u8 *uuid, const u8 *pin, size_t pin_len, 738 int timeout) 739{ 740 struct wps_uuid_pin *p; 741 742 p = os_zalloc(sizeof(*p)); 743 if (p == NULL) 744 return -1; 745 if (addr) 746 os_memcpy(p->enrollee_addr, addr, ETH_ALEN); 747 if (uuid == NULL) 748 p->wildcard_uuid = 1; 749 else 750 os_memcpy(p->uuid, uuid, WPS_UUID_LEN); 751 p->pin = os_malloc(pin_len); 752 if (p->pin == NULL) { 753 os_free(p); 754 return -1; 755 } 756 os_memcpy(p->pin, pin, pin_len); 757 p->pin_len = pin_len; 758 759 if (timeout) { 760 p->flags |= PIN_EXPIRES; 761 os_get_reltime(&p->expiration); 762 p->expiration.sec += timeout; 763 } 764 765 if (p->wildcard_uuid) 766 wps_registrar_invalidate_unused(reg); 767 768 dl_list_add(®->pins, &p->list); 769 770 wpa_printf(MSG_DEBUG, "WPS: A new PIN configured (timeout=%d)", 771 timeout); 772 wpa_hexdump(MSG_DEBUG, "WPS: UUID", uuid, WPS_UUID_LEN); 773 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: PIN", pin, pin_len); 774 reg->selected_registrar = 1; 775 reg->pbc = 0; 776 if (addr) 777 wps_registrar_add_authorized_mac(reg, addr); 778 else 779 wps_registrar_add_authorized_mac( 780 reg, (u8 *) "\xff\xff\xff\xff\xff\xff"); 781 wps_registrar_selected_registrar_changed(reg, 0); 782 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 783 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, 784 wps_registrar_set_selected_timeout, 785 reg, NULL); 786 787 return 0; 788} 789 790 791static void wps_registrar_remove_pin(struct wps_registrar *reg, 792 struct wps_uuid_pin *pin) 793{ 794 u8 *addr; 795 u8 bcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 796 797 if (is_zero_ether_addr(pin->enrollee_addr)) 798 addr = bcast; 799 else 800 addr = pin->enrollee_addr; 801 wps_registrar_remove_authorized_mac(reg, addr); 802 wps_remove_pin(pin); 803 wps_registrar_selected_registrar_changed(reg, 0); 804} 805 806 807static void wps_registrar_expire_pins(struct wps_registrar *reg) 808{ 809 struct wps_uuid_pin *pin, *prev; 810 struct os_reltime now; 811 812 os_get_reltime(&now); 813 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 814 { 815 if ((pin->flags & PIN_EXPIRES) && 816 os_reltime_before(&pin->expiration, &now)) { 817 wpa_hexdump(MSG_DEBUG, "WPS: Expired PIN for UUID", 818 pin->uuid, WPS_UUID_LEN); 819 wps_registrar_remove_pin(reg, pin); 820 } 821 } 822} 823 824 825/** 826 * wps_registrar_invalidate_wildcard_pin - Invalidate a wildcard PIN 827 * @reg: Registrar data from wps_registrar_init() 828 * @dev_pw: PIN to search for or %NULL to match any 829 * @dev_pw_len: Length of dev_pw in octets 830 * Returns: 0 on success, -1 if not wildcard PIN is enabled 831 */ 832static int wps_registrar_invalidate_wildcard_pin(struct wps_registrar *reg, 833 const u8 *dev_pw, 834 size_t dev_pw_len) 835{ 836 struct wps_uuid_pin *pin, *prev; 837 838 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 839 { 840 if (dev_pw && pin->pin && 841 (dev_pw_len != pin->pin_len || 842 os_memcmp_const(dev_pw, pin->pin, dev_pw_len) != 0)) 843 continue; /* different PIN */ 844 if (pin->wildcard_uuid) { 845 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID", 846 pin->uuid, WPS_UUID_LEN); 847 wps_registrar_remove_pin(reg, pin); 848 return 0; 849 } 850 } 851 852 return -1; 853} 854 855 856/** 857 * wps_registrar_invalidate_pin - Invalidate a PIN for a specific UUID-E 858 * @reg: Registrar data from wps_registrar_init() 859 * @uuid: UUID-E 860 * Returns: 0 on success, -1 on failure (e.g., PIN not found) 861 */ 862int wps_registrar_invalidate_pin(struct wps_registrar *reg, const u8 *uuid) 863{ 864 struct wps_uuid_pin *pin, *prev; 865 866 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 867 { 868 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 869 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID", 870 pin->uuid, WPS_UUID_LEN); 871 wps_registrar_remove_pin(reg, pin); 872 return 0; 873 } 874 } 875 876 return -1; 877} 878 879 880static const u8 * wps_registrar_get_pin(struct wps_registrar *reg, 881 const u8 *uuid, size_t *pin_len) 882{ 883 struct wps_uuid_pin *pin, *found = NULL; 884 885 wps_registrar_expire_pins(reg); 886 887 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 888 if (!pin->wildcard_uuid && 889 os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 890 found = pin; 891 break; 892 } 893 } 894 895 if (!found) { 896 /* Check for wildcard UUIDs since none of the UUID-specific 897 * PINs matched */ 898 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 899 if (pin->wildcard_uuid == 1 || 900 pin->wildcard_uuid == 2) { 901 wpa_printf(MSG_DEBUG, "WPS: Found a wildcard " 902 "PIN. Assigned it for this UUID-E"); 903 pin->wildcard_uuid++; 904 os_memcpy(pin->uuid, uuid, WPS_UUID_LEN); 905 found = pin; 906 break; 907 } 908 } 909 } 910 911 if (!found) 912 return NULL; 913 914 /* 915 * Lock the PIN to avoid attacks based on concurrent re-use of the PIN 916 * that could otherwise avoid PIN invalidations. 917 */ 918 if (found->flags & PIN_LOCKED) { 919 wpa_printf(MSG_DEBUG, "WPS: Selected PIN locked - do not " 920 "allow concurrent re-use"); 921 return NULL; 922 } 923 *pin_len = found->pin_len; 924 found->flags |= PIN_LOCKED; 925 return found->pin; 926} 927 928 929/** 930 * wps_registrar_unlock_pin - Unlock a PIN for a specific UUID-E 931 * @reg: Registrar data from wps_registrar_init() 932 * @uuid: UUID-E 933 * Returns: 0 on success, -1 on failure 934 * 935 * PINs are locked to enforce only one concurrent use. This function unlocks a 936 * PIN to allow it to be used again. If the specified PIN was configured using 937 * a wildcard UUID, it will be removed instead of allowing multiple uses. 938 */ 939int wps_registrar_unlock_pin(struct wps_registrar *reg, const u8 *uuid) 940{ 941 struct wps_uuid_pin *pin; 942 943 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 944 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 945 if (pin->wildcard_uuid == 3) { 946 wpa_printf(MSG_DEBUG, "WPS: Invalidating used " 947 "wildcard PIN"); 948 return wps_registrar_invalidate_pin(reg, uuid); 949 } 950 pin->flags &= ~PIN_LOCKED; 951 return 0; 952 } 953 } 954 955 return -1; 956} 957 958 959static void wps_registrar_stop_pbc(struct wps_registrar *reg) 960{ 961 reg->selected_registrar = 0; 962 reg->pbc = 0; 963 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN); 964 wps_registrar_remove_authorized_mac(reg, 965 (u8 *) "\xff\xff\xff\xff\xff\xff"); 966 wps_registrar_selected_registrar_changed(reg, 0); 967} 968 969 970static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx) 971{ 972 struct wps_registrar *reg = eloop_ctx; 973 974 wpa_printf(MSG_DEBUG, "WPS: PBC timed out - disable PBC mode"); 975 wps_pbc_timeout_event(reg->wps); 976 wps_registrar_stop_pbc(reg); 977} 978 979 980/** 981 * wps_registrar_button_pushed - Notify Registrar that AP button was pushed 982 * @reg: Registrar data from wps_registrar_init() 983 * @p2p_dev_addr: Limit allowed PBC devices to the specified P2P device, %NULL 984 * indicates no such filtering 985 * Returns: 0 on success, -1 on failure, -2 on session overlap 986 * 987 * This function is called on an AP when a push button is pushed to activate 988 * PBC mode. The PBC mode will be stopped after walk time (2 minutes) timeout 989 * or when a PBC registration is completed. If more than one Enrollee in active 990 * PBC mode has been detected during the monitor time (previous 2 minutes), the 991 * PBC mode is not activated and -2 is returned to indicate session overlap. 992 * This is skipped if a specific Enrollee is selected. 993 */ 994int wps_registrar_button_pushed(struct wps_registrar *reg, 995 const u8 *p2p_dev_addr) 996{ 997 if (p2p_dev_addr == NULL && 998 wps_registrar_pbc_overlap(reg, NULL, NULL)) { 999 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - do not start PBC " 1000 "mode"); 1001 wps_pbc_overlap_event(reg->wps); 1002 return -2; 1003 } 1004 wpa_printf(MSG_DEBUG, "WPS: Button pushed - PBC mode started"); 1005 reg->force_pbc_overlap = 0; 1006 reg->selected_registrar = 1; 1007 reg->pbc = 1; 1008 if (p2p_dev_addr) 1009 os_memcpy(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN); 1010 else 1011 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN); 1012 wps_registrar_add_authorized_mac(reg, 1013 (u8 *) "\xff\xff\xff\xff\xff\xff"); 1014 wps_registrar_selected_registrar_changed(reg, 0); 1015 1016 wps_pbc_active_event(reg->wps); 1017 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 1018 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 1019 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wps_registrar_pbc_timeout, 1020 reg, NULL); 1021 return 0; 1022} 1023 1024 1025static void wps_registrar_pbc_completed(struct wps_registrar *reg) 1026{ 1027 wpa_printf(MSG_DEBUG, "WPS: PBC completed - stopping PBC mode"); 1028 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 1029 wps_registrar_stop_pbc(reg); 1030 wps_pbc_disable_event(reg->wps); 1031} 1032 1033 1034static void wps_registrar_pin_completed(struct wps_registrar *reg) 1035{ 1036 wpa_printf(MSG_DEBUG, "WPS: PIN completed using internal Registrar"); 1037 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 1038 reg->selected_registrar = 0; 1039 wps_registrar_selected_registrar_changed(reg, 0); 1040} 1041 1042 1043void wps_registrar_complete(struct wps_registrar *registrar, const u8 *uuid_e, 1044 const u8 *dev_pw, size_t dev_pw_len) 1045{ 1046 if (registrar->pbc) { 1047 wps_registrar_remove_pbc_session(registrar, 1048 uuid_e, NULL); 1049 wps_registrar_pbc_completed(registrar); 1050#ifdef WPS_WORKAROUNDS 1051 os_get_reltime(®istrar->pbc_ignore_start); 1052#endif /* WPS_WORKAROUNDS */ 1053 os_memcpy(registrar->pbc_ignore_uuid, uuid_e, WPS_UUID_LEN); 1054 } else { 1055 wps_registrar_pin_completed(registrar); 1056 } 1057 1058 if (dev_pw && 1059 wps_registrar_invalidate_wildcard_pin(registrar, dev_pw, 1060 dev_pw_len) == 0) { 1061 wpa_hexdump_key(MSG_DEBUG, "WPS: Invalidated wildcard PIN", 1062 dev_pw, dev_pw_len); 1063 } 1064} 1065 1066 1067int wps_registrar_wps_cancel(struct wps_registrar *reg) 1068{ 1069 if (reg->pbc) { 1070 wpa_printf(MSG_DEBUG, "WPS: PBC is set - cancelling it"); 1071 wps_registrar_pbc_timeout(reg, NULL); 1072 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 1073 return 1; 1074 } else if (reg->selected_registrar) { 1075 /* PIN Method */ 1076 wpa_printf(MSG_DEBUG, "WPS: PIN is set - cancelling it"); 1077 wps_registrar_pin_completed(reg); 1078 wps_registrar_invalidate_wildcard_pin(reg, NULL, 0); 1079 return 1; 1080 } 1081 return 0; 1082} 1083 1084 1085/** 1086 * wps_registrar_probe_req_rx - Notify Registrar of Probe Request 1087 * @reg: Registrar data from wps_registrar_init() 1088 * @addr: MAC address of the Probe Request sender 1089 * @wps_data: WPS IE contents 1090 * 1091 * This function is called on an AP when a Probe Request with WPS IE is 1092 * received. This is used to track PBC mode use and to detect possible overlap 1093 * situation with other WPS APs. 1094 */ 1095void wps_registrar_probe_req_rx(struct wps_registrar *reg, const u8 *addr, 1096 const struct wpabuf *wps_data, 1097 int p2p_wildcard) 1098{ 1099 struct wps_parse_attr attr; 1100 int skip_add = 0; 1101 1102 wpa_hexdump_buf(MSG_MSGDUMP, 1103 "WPS: Probe Request with WPS data received", 1104 wps_data); 1105 1106 if (wps_parse_msg(wps_data, &attr) < 0) 1107 return; 1108 1109 if (attr.config_methods == NULL) { 1110 wpa_printf(MSG_DEBUG, "WPS: No Config Methods attribute in " 1111 "Probe Request"); 1112 return; 1113 } 1114 1115 if (attr.dev_password_id == NULL) { 1116 wpa_printf(MSG_DEBUG, "WPS: No Device Password Id attribute " 1117 "in Probe Request"); 1118 return; 1119 } 1120 1121 if (reg->enrollee_seen_cb && attr.uuid_e && 1122 attr.primary_dev_type && attr.request_type && !p2p_wildcard) { 1123 char *dev_name = NULL; 1124 if (attr.dev_name) { 1125 dev_name = os_zalloc(attr.dev_name_len + 1); 1126 if (dev_name) { 1127 os_memcpy(dev_name, attr.dev_name, 1128 attr.dev_name_len); 1129 } 1130 } 1131 reg->enrollee_seen_cb(reg->cb_ctx, addr, attr.uuid_e, 1132 attr.primary_dev_type, 1133 WPA_GET_BE16(attr.config_methods), 1134 WPA_GET_BE16(attr.dev_password_id), 1135 *attr.request_type, dev_name); 1136 os_free(dev_name); 1137 } 1138 1139 if (WPA_GET_BE16(attr.dev_password_id) != DEV_PW_PUSHBUTTON) 1140 return; /* Not PBC */ 1141 1142 wpa_printf(MSG_DEBUG, "WPS: Probe Request for PBC received from " 1143 MACSTR, MAC2STR(addr)); 1144 if (attr.uuid_e == NULL) { 1145 wpa_printf(MSG_DEBUG, "WPS: Invalid Probe Request WPS IE: No " 1146 "UUID-E included"); 1147 return; 1148 } 1149 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E from Probe Request", attr.uuid_e, 1150 WPS_UUID_LEN); 1151 1152#ifdef WPS_WORKAROUNDS 1153 if (reg->pbc_ignore_start.sec && 1154 os_memcmp(attr.uuid_e, reg->pbc_ignore_uuid, WPS_UUID_LEN) == 0) { 1155 struct os_reltime now, dur; 1156 os_get_reltime(&now); 1157 os_reltime_sub(&now, ®->pbc_ignore_start, &dur); 1158 if (dur.sec >= 0 && dur.sec < 5) { 1159 wpa_printf(MSG_DEBUG, "WPS: Ignore PBC activation " 1160 "based on Probe Request from the Enrollee " 1161 "that just completed PBC provisioning"); 1162 skip_add = 1; 1163 } else 1164 reg->pbc_ignore_start.sec = 0; 1165 } 1166#endif /* WPS_WORKAROUNDS */ 1167 1168 if (!skip_add) 1169 wps_registrar_add_pbc_session(reg, addr, attr.uuid_e); 1170 if (wps_registrar_pbc_overlap(reg, addr, attr.uuid_e)) { 1171 wpa_printf(MSG_DEBUG, "WPS: PBC session overlap detected"); 1172 reg->force_pbc_overlap = 1; 1173 wps_pbc_overlap_event(reg->wps); 1174 } 1175} 1176 1177 1178int wps_cb_new_psk(struct wps_registrar *reg, const u8 *mac_addr, 1179 const u8 *p2p_dev_addr, const u8 *psk, size_t psk_len) 1180{ 1181 if (reg->new_psk_cb == NULL) 1182 return 0; 1183 1184 return reg->new_psk_cb(reg->cb_ctx, mac_addr, p2p_dev_addr, psk, 1185 psk_len); 1186} 1187 1188 1189static void wps_cb_pin_needed(struct wps_registrar *reg, const u8 *uuid_e, 1190 const struct wps_device_data *dev) 1191{ 1192 if (reg->pin_needed_cb == NULL) 1193 return; 1194 1195 reg->pin_needed_cb(reg->cb_ctx, uuid_e, dev); 1196} 1197 1198 1199static void wps_cb_reg_success(struct wps_registrar *reg, const u8 *mac_addr, 1200 const u8 *uuid_e, const u8 *dev_pw, 1201 size_t dev_pw_len) 1202{ 1203 if (reg->reg_success_cb == NULL) 1204 return; 1205 1206 reg->reg_success_cb(reg->cb_ctx, mac_addr, uuid_e, dev_pw, dev_pw_len); 1207} 1208 1209 1210static int wps_cb_set_ie(struct wps_registrar *reg, struct wpabuf *beacon_ie, 1211 struct wpabuf *probe_resp_ie) 1212{ 1213 return reg->set_ie_cb(reg->cb_ctx, beacon_ie, probe_resp_ie); 1214} 1215 1216 1217static void wps_cb_set_sel_reg(struct wps_registrar *reg) 1218{ 1219 u16 methods = 0; 1220 if (reg->set_sel_reg_cb == NULL) 1221 return; 1222 1223 if (reg->selected_registrar) { 1224 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 1225 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 1226 WPS_CONFIG_PHY_PUSHBUTTON); 1227 if (reg->pbc) 1228 wps_set_pushbutton(&methods, reg->wps->config_methods); 1229 } 1230 1231 wpa_printf(MSG_DEBUG, "WPS: wps_cb_set_sel_reg: sel_reg=%d " 1232 "config_methods=0x%x pbc=%d methods=0x%x", 1233 reg->selected_registrar, reg->wps->config_methods, 1234 reg->pbc, methods); 1235 1236 reg->set_sel_reg_cb(reg->cb_ctx, reg->selected_registrar, 1237 reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT, 1238 methods); 1239} 1240 1241 1242static int wps_set_ie(struct wps_registrar *reg) 1243{ 1244 struct wpabuf *beacon; 1245 struct wpabuf *probe; 1246 const u8 *auth_macs; 1247 size_t count; 1248 size_t vendor_len = 0; 1249 int i; 1250 1251 if (reg->set_ie_cb == NULL) 1252 return 0; 1253 1254 for (i = 0; i < MAX_WPS_VENDOR_EXTENSIONS; i++) { 1255 if (reg->wps->dev.vendor_ext[i]) { 1256 vendor_len += 2 + 2; 1257 vendor_len += wpabuf_len(reg->wps->dev.vendor_ext[i]); 1258 } 1259 } 1260 1261 beacon = wpabuf_alloc(400 + vendor_len); 1262 if (beacon == NULL) 1263 return -1; 1264 probe = wpabuf_alloc(500 + vendor_len); 1265 if (probe == NULL) { 1266 wpabuf_free(beacon); 1267 return -1; 1268 } 1269 1270 auth_macs = wps_authorized_macs(reg, &count); 1271 1272 wpa_printf(MSG_DEBUG, "WPS: Build Beacon IEs"); 1273 1274 if (wps_build_version(beacon) || 1275 wps_build_wps_state(reg->wps, beacon) || 1276 wps_build_ap_setup_locked(reg->wps, beacon) || 1277 wps_build_selected_registrar(reg, beacon) || 1278 wps_build_sel_reg_dev_password_id(reg, beacon) || 1279 wps_build_sel_reg_config_methods(reg, beacon) || 1280 wps_build_sel_pbc_reg_uuid_e(reg, beacon) || 1281 (reg->dualband && wps_build_rf_bands(®->wps->dev, beacon, 0)) || 1282 wps_build_wfa_ext(beacon, 0, auth_macs, count) || 1283 wps_build_vendor_ext(®->wps->dev, beacon)) { 1284 wpabuf_free(beacon); 1285 wpabuf_free(probe); 1286 return -1; 1287 } 1288 1289#ifdef CONFIG_P2P 1290 if (wps_build_dev_name(®->wps->dev, beacon) || 1291 wps_build_primary_dev_type(®->wps->dev, beacon)) { 1292 wpabuf_free(beacon); 1293 wpabuf_free(probe); 1294 return -1; 1295 } 1296#endif /* CONFIG_P2P */ 1297 1298 wpa_printf(MSG_DEBUG, "WPS: Build Probe Response IEs"); 1299 1300 if (wps_build_version(probe) || 1301 wps_build_wps_state(reg->wps, probe) || 1302 wps_build_ap_setup_locked(reg->wps, probe) || 1303 wps_build_selected_registrar(reg, probe) || 1304 wps_build_sel_reg_dev_password_id(reg, probe) || 1305 wps_build_sel_reg_config_methods(reg, probe) || 1306 wps_build_resp_type(probe, reg->wps->ap ? WPS_RESP_AP : 1307 WPS_RESP_REGISTRAR) || 1308 wps_build_uuid_e(probe, reg->wps->uuid) || 1309 wps_build_device_attrs(®->wps->dev, probe) || 1310 wps_build_probe_config_methods(reg, probe) || 1311 (reg->dualband && wps_build_rf_bands(®->wps->dev, probe, 0)) || 1312 wps_build_wfa_ext(probe, 0, auth_macs, count) || 1313 wps_build_vendor_ext(®->wps->dev, probe)) { 1314 wpabuf_free(beacon); 1315 wpabuf_free(probe); 1316 return -1; 1317 } 1318 1319 beacon = wps_ie_encapsulate(beacon); 1320 probe = wps_ie_encapsulate(probe); 1321 1322 if (!beacon || !probe) { 1323 wpabuf_free(beacon); 1324 wpabuf_free(probe); 1325 return -1; 1326 } 1327 1328 if (reg->static_wep_only) { 1329 /* 1330 * Windows XP and Vista clients can get confused about 1331 * EAP-Identity/Request when they probe the network with 1332 * EAPOL-Start. In such a case, they may assume the network is 1333 * using IEEE 802.1X and prompt user for a certificate while 1334 * the correct (non-WPS) behavior would be to ask for the 1335 * static WEP key. As a workaround, use Microsoft Provisioning 1336 * IE to advertise that legacy 802.1X is not supported. 1337 */ 1338 const u8 ms_wps[7] = { 1339 WLAN_EID_VENDOR_SPECIFIC, 5, 1340 /* Microsoft Provisioning IE (00:50:f2:5) */ 1341 0x00, 0x50, 0xf2, 5, 1342 0x00 /* no legacy 802.1X or MS WPS */ 1343 }; 1344 wpa_printf(MSG_DEBUG, "WPS: Add Microsoft Provisioning IE " 1345 "into Beacon/Probe Response frames"); 1346 wpabuf_put_data(beacon, ms_wps, sizeof(ms_wps)); 1347 wpabuf_put_data(probe, ms_wps, sizeof(ms_wps)); 1348 } 1349 1350 return wps_cb_set_ie(reg, beacon, probe); 1351} 1352 1353 1354static int wps_get_dev_password(struct wps_data *wps) 1355{ 1356 const u8 *pin; 1357 size_t pin_len = 0; 1358 1359 bin_clear_free(wps->dev_password, wps->dev_password_len); 1360 wps->dev_password = NULL; 1361 1362 if (wps->pbc) { 1363 wpa_printf(MSG_DEBUG, "WPS: Use default PIN for PBC"); 1364 pin = (const u8 *) "00000000"; 1365 pin_len = 8; 1366#ifdef CONFIG_WPS_NFC 1367 } else if (wps->nfc_pw_token) { 1368 if (wps->nfc_pw_token->pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) 1369 { 1370 wpa_printf(MSG_DEBUG, "WPS: Using NFC connection " 1371 "handover and abbreviated WPS handshake " 1372 "without Device Password"); 1373 return 0; 1374 } 1375 wpa_printf(MSG_DEBUG, "WPS: Use OOB Device Password from NFC " 1376 "Password Token"); 1377 pin = wps->nfc_pw_token->dev_pw; 1378 pin_len = wps->nfc_pw_token->dev_pw_len; 1379 } else if (wps->dev_pw_id >= 0x10 && 1380 wps->wps->ap_nfc_dev_pw_id == wps->dev_pw_id && 1381 wps->wps->ap_nfc_dev_pw) { 1382 wpa_printf(MSG_DEBUG, "WPS: Use OOB Device Password from own NFC Password Token"); 1383 pin = wpabuf_head(wps->wps->ap_nfc_dev_pw); 1384 pin_len = wpabuf_len(wps->wps->ap_nfc_dev_pw); 1385#endif /* CONFIG_WPS_NFC */ 1386 } else { 1387 pin = wps_registrar_get_pin(wps->wps->registrar, wps->uuid_e, 1388 &pin_len); 1389 if (pin && wps->dev_pw_id >= 0x10) { 1390 wpa_printf(MSG_DEBUG, "WPS: No match for OOB Device " 1391 "Password ID, but PIN found"); 1392 /* 1393 * See whether Enrollee is willing to use PIN instead. 1394 */ 1395 wps->dev_pw_id = DEV_PW_DEFAULT; 1396 } 1397 } 1398 if (pin == NULL) { 1399 wpa_printf(MSG_DEBUG, "WPS: No Device Password available for " 1400 "the Enrollee (context %p registrar %p)", 1401 wps->wps, wps->wps->registrar); 1402 wps_cb_pin_needed(wps->wps->registrar, wps->uuid_e, 1403 &wps->peer_dev); 1404 return -1; 1405 } 1406 1407 wps->dev_password = os_malloc(pin_len); 1408 if (wps->dev_password == NULL) 1409 return -1; 1410 os_memcpy(wps->dev_password, pin, pin_len); 1411 wps->dev_password_len = pin_len; 1412 1413 return 0; 1414} 1415 1416 1417static int wps_build_uuid_r(struct wps_data *wps, struct wpabuf *msg) 1418{ 1419 wpa_printf(MSG_DEBUG, "WPS: * UUID-R"); 1420 wpabuf_put_be16(msg, ATTR_UUID_R); 1421 wpabuf_put_be16(msg, WPS_UUID_LEN); 1422 wpabuf_put_data(msg, wps->uuid_r, WPS_UUID_LEN); 1423 return 0; 1424} 1425 1426 1427static int wps_build_r_hash(struct wps_data *wps, struct wpabuf *msg) 1428{ 1429 u8 *hash; 1430 const u8 *addr[4]; 1431 size_t len[4]; 1432 1433 if (random_get_bytes(wps->snonce, 2 * WPS_SECRET_NONCE_LEN) < 0) 1434 return -1; 1435 wpa_hexdump(MSG_DEBUG, "WPS: R-S1", wps->snonce, WPS_SECRET_NONCE_LEN); 1436 wpa_hexdump(MSG_DEBUG, "WPS: R-S2", 1437 wps->snonce + WPS_SECRET_NONCE_LEN, WPS_SECRET_NONCE_LEN); 1438 1439 if (wps->dh_pubkey_e == NULL || wps->dh_pubkey_r == NULL) { 1440 wpa_printf(MSG_DEBUG, "WPS: DH public keys not available for " 1441 "R-Hash derivation"); 1442 return -1; 1443 } 1444 1445 wpa_printf(MSG_DEBUG, "WPS: * R-Hash1"); 1446 wpabuf_put_be16(msg, ATTR_R_HASH1); 1447 wpabuf_put_be16(msg, SHA256_MAC_LEN); 1448 hash = wpabuf_put(msg, SHA256_MAC_LEN); 1449 /* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */ 1450 addr[0] = wps->snonce; 1451 len[0] = WPS_SECRET_NONCE_LEN; 1452 addr[1] = wps->psk1; 1453 len[1] = WPS_PSK_LEN; 1454 addr[2] = wpabuf_head(wps->dh_pubkey_e); 1455 len[2] = wpabuf_len(wps->dh_pubkey_e); 1456 addr[3] = wpabuf_head(wps->dh_pubkey_r); 1457 len[3] = wpabuf_len(wps->dh_pubkey_r); 1458 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 1459 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash1", hash, SHA256_MAC_LEN); 1460 1461 wpa_printf(MSG_DEBUG, "WPS: * R-Hash2"); 1462 wpabuf_put_be16(msg, ATTR_R_HASH2); 1463 wpabuf_put_be16(msg, SHA256_MAC_LEN); 1464 hash = wpabuf_put(msg, SHA256_MAC_LEN); 1465 /* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */ 1466 addr[0] = wps->snonce + WPS_SECRET_NONCE_LEN; 1467 addr[1] = wps->psk2; 1468 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 1469 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash2", hash, SHA256_MAC_LEN); 1470 1471 return 0; 1472} 1473 1474 1475static int wps_build_r_snonce1(struct wps_data *wps, struct wpabuf *msg) 1476{ 1477 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce1"); 1478 wpabuf_put_be16(msg, ATTR_R_SNONCE1); 1479 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN); 1480 wpabuf_put_data(msg, wps->snonce, WPS_SECRET_NONCE_LEN); 1481 return 0; 1482} 1483 1484 1485static int wps_build_r_snonce2(struct wps_data *wps, struct wpabuf *msg) 1486{ 1487 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce2"); 1488 wpabuf_put_be16(msg, ATTR_R_SNONCE2); 1489 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN); 1490 wpabuf_put_data(msg, wps->snonce + WPS_SECRET_NONCE_LEN, 1491 WPS_SECRET_NONCE_LEN); 1492 return 0; 1493} 1494 1495 1496static int wps_build_cred_network_idx(struct wpabuf *msg, 1497 const struct wps_credential *cred) 1498{ 1499 wpa_printf(MSG_DEBUG, "WPS: * Network Index (1)"); 1500 wpabuf_put_be16(msg, ATTR_NETWORK_INDEX); 1501 wpabuf_put_be16(msg, 1); 1502 wpabuf_put_u8(msg, 1); 1503 return 0; 1504} 1505 1506 1507static int wps_build_cred_ssid(struct wpabuf *msg, 1508 const struct wps_credential *cred) 1509{ 1510 wpa_printf(MSG_DEBUG, "WPS: * SSID"); 1511 wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID for Credential", 1512 cred->ssid, cred->ssid_len); 1513 wpabuf_put_be16(msg, ATTR_SSID); 1514 wpabuf_put_be16(msg, cred->ssid_len); 1515 wpabuf_put_data(msg, cred->ssid, cred->ssid_len); 1516 return 0; 1517} 1518 1519 1520static int wps_build_cred_auth_type(struct wpabuf *msg, 1521 const struct wps_credential *cred) 1522{ 1523 wpa_printf(MSG_DEBUG, "WPS: * Authentication Type (0x%x)", 1524 cred->auth_type); 1525 wpabuf_put_be16(msg, ATTR_AUTH_TYPE); 1526 wpabuf_put_be16(msg, 2); 1527 wpabuf_put_be16(msg, cred->auth_type); 1528 return 0; 1529} 1530 1531 1532static int wps_build_cred_encr_type(struct wpabuf *msg, 1533 const struct wps_credential *cred) 1534{ 1535 wpa_printf(MSG_DEBUG, "WPS: * Encryption Type (0x%x)", 1536 cred->encr_type); 1537 wpabuf_put_be16(msg, ATTR_ENCR_TYPE); 1538 wpabuf_put_be16(msg, 2); 1539 wpabuf_put_be16(msg, cred->encr_type); 1540 return 0; 1541} 1542 1543 1544static int wps_build_cred_network_key(struct wpabuf *msg, 1545 const struct wps_credential *cred) 1546{ 1547 wpa_printf(MSG_DEBUG, "WPS: * Network Key (len=%d)", 1548 (int) cred->key_len); 1549 wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key", 1550 cred->key, cred->key_len); 1551 wpabuf_put_be16(msg, ATTR_NETWORK_KEY); 1552 wpabuf_put_be16(msg, cred->key_len); 1553 wpabuf_put_data(msg, cred->key, cred->key_len); 1554 return 0; 1555} 1556 1557 1558static int wps_build_credential(struct wpabuf *msg, 1559 const struct wps_credential *cred) 1560{ 1561 if (wps_build_cred_network_idx(msg, cred) || 1562 wps_build_cred_ssid(msg, cred) || 1563 wps_build_cred_auth_type(msg, cred) || 1564 wps_build_cred_encr_type(msg, cred) || 1565 wps_build_cred_network_key(msg, cred) || 1566 wps_build_mac_addr(msg, cred->mac_addr)) 1567 return -1; 1568 return 0; 1569} 1570 1571 1572int wps_build_credential_wrap(struct wpabuf *msg, 1573 const struct wps_credential *cred) 1574{ 1575 struct wpabuf *wbuf; 1576 wbuf = wpabuf_alloc(200); 1577 if (wbuf == NULL) 1578 return -1; 1579 if (wps_build_credential(wbuf, cred)) { 1580 wpabuf_free(wbuf); 1581 return -1; 1582 } 1583 wpabuf_put_be16(msg, ATTR_CRED); 1584 wpabuf_put_be16(msg, wpabuf_len(wbuf)); 1585 wpabuf_put_buf(msg, wbuf); 1586 wpabuf_free(wbuf); 1587 return 0; 1588} 1589 1590 1591int wps_build_cred(struct wps_data *wps, struct wpabuf *msg) 1592{ 1593 struct wpabuf *cred; 1594 1595 if (wps->wps->registrar->skip_cred_build) 1596 goto skip_cred_build; 1597 1598 wpa_printf(MSG_DEBUG, "WPS: * Credential"); 1599 if (wps->use_cred) { 1600 os_memcpy(&wps->cred, wps->use_cred, sizeof(wps->cred)); 1601 goto use_provided; 1602 } 1603 os_memset(&wps->cred, 0, sizeof(wps->cred)); 1604 1605 os_memcpy(wps->cred.ssid, wps->wps->ssid, wps->wps->ssid_len); 1606 wps->cred.ssid_len = wps->wps->ssid_len; 1607 1608 /* Select the best authentication and encryption type */ 1609 wpa_printf(MSG_DEBUG, 1610 "WPS: Own auth types 0x%x - masked Enrollee auth types 0x%x", 1611 wps->wps->auth_types, wps->auth_type); 1612 if (wps->auth_type & WPS_AUTH_WPA2PSK) 1613 wps->auth_type = WPS_AUTH_WPA2PSK; 1614 else if (wps->auth_type & WPS_AUTH_WPAPSK) 1615 wps->auth_type = WPS_AUTH_WPAPSK; 1616 else if (wps->auth_type & WPS_AUTH_OPEN) 1617 wps->auth_type = WPS_AUTH_OPEN; 1618 else { 1619 wpa_printf(MSG_DEBUG, "WPS: Unsupported auth_type 0x%x", 1620 wps->auth_type); 1621 return -1; 1622 } 1623 wps->cred.auth_type = wps->auth_type; 1624 1625 wpa_printf(MSG_DEBUG, 1626 "WPS: Own encr types 0x%x (rsn: 0x%x, wpa: 0x%x) - masked Enrollee encr types 0x%x", 1627 wps->wps->encr_types, wps->wps->encr_types_rsn, 1628 wps->wps->encr_types_wpa, wps->encr_type); 1629 if (wps->wps->ap && wps->auth_type == WPS_AUTH_WPA2PSK) 1630 wps->encr_type &= wps->wps->encr_types_rsn; 1631 else if (wps->wps->ap && wps->auth_type == WPS_AUTH_WPAPSK) 1632 wps->encr_type &= wps->wps->encr_types_wpa; 1633 if (wps->auth_type == WPS_AUTH_WPA2PSK || 1634 wps->auth_type == WPS_AUTH_WPAPSK) { 1635 if (wps->encr_type & WPS_ENCR_AES) 1636 wps->encr_type = WPS_ENCR_AES; 1637 else if (wps->encr_type & WPS_ENCR_TKIP) 1638 wps->encr_type = WPS_ENCR_TKIP; 1639 else { 1640 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption " 1641 "type for WPA/WPA2"); 1642 return -1; 1643 } 1644 } else { 1645 if (wps->encr_type & WPS_ENCR_NONE) 1646 wps->encr_type = WPS_ENCR_NONE; 1647#ifdef CONFIG_TESTING_OPTIONS 1648 else if (wps->encr_type & WPS_ENCR_WEP) 1649 wps->encr_type = WPS_ENCR_WEP; 1650#endif /* CONFIG_TESTING_OPTIONS */ 1651 else { 1652 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption " 1653 "type for non-WPA/WPA2 mode"); 1654 return -1; 1655 } 1656 } 1657 wps->cred.encr_type = wps->encr_type; 1658 /* 1659 * Set MAC address in the Credential to be the Enrollee's MAC address 1660 */ 1661 os_memcpy(wps->cred.mac_addr, wps->mac_addr_e, ETH_ALEN); 1662 1663 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->wps->ap && 1664 !wps->wps->registrar->disable_auto_conf) { 1665 u8 r[16]; 1666 /* Generate a random passphrase */ 1667 if (random_pool_ready() != 1 || 1668 random_get_bytes(r, sizeof(r)) < 0) { 1669 wpa_printf(MSG_INFO, 1670 "WPS: Could not generate random PSK"); 1671 return -1; 1672 } 1673 os_free(wps->new_psk); 1674 wps->new_psk = base64_encode(r, sizeof(r), &wps->new_psk_len); 1675 if (wps->new_psk == NULL) 1676 return -1; 1677 wps->new_psk_len--; /* remove newline */ 1678 while (wps->new_psk_len && 1679 wps->new_psk[wps->new_psk_len - 1] == '=') 1680 wps->new_psk_len--; 1681 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Generated passphrase", 1682 wps->new_psk, wps->new_psk_len); 1683 os_memcpy(wps->cred.key, wps->new_psk, wps->new_psk_len); 1684 wps->cred.key_len = wps->new_psk_len; 1685 } else if (!wps->wps->registrar->force_per_enrollee_psk && 1686 wps->use_psk_key && wps->wps->psk_set) { 1687 char hex[65]; 1688 wpa_printf(MSG_DEBUG, "WPS: Use PSK format for Network Key"); 1689 wpa_snprintf_hex(hex, sizeof(hex), wps->wps->psk, 32); 1690 os_memcpy(wps->cred.key, hex, 32 * 2); 1691 wps->cred.key_len = 32 * 2; 1692 } else if (!wps->wps->registrar->force_per_enrollee_psk && 1693 wps->wps->network_key) { 1694 os_memcpy(wps->cred.key, wps->wps->network_key, 1695 wps->wps->network_key_len); 1696 wps->cred.key_len = wps->wps->network_key_len; 1697 } else if (wps->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) { 1698 char hex[65]; 1699 /* Generate a random per-device PSK */ 1700 os_free(wps->new_psk); 1701 wps->new_psk_len = 32; 1702 wps->new_psk = os_malloc(wps->new_psk_len); 1703 if (wps->new_psk == NULL) 1704 return -1; 1705 if (random_pool_ready() != 1 || 1706 random_get_bytes(wps->new_psk, wps->new_psk_len) < 0) { 1707 wpa_printf(MSG_INFO, 1708 "WPS: Could not generate random PSK"); 1709 os_free(wps->new_psk); 1710 wps->new_psk = NULL; 1711 return -1; 1712 } 1713 wpa_hexdump_key(MSG_DEBUG, "WPS: Generated per-device PSK", 1714 wps->new_psk, wps->new_psk_len); 1715 wpa_snprintf_hex(hex, sizeof(hex), wps->new_psk, 1716 wps->new_psk_len); 1717 os_memcpy(wps->cred.key, hex, wps->new_psk_len * 2); 1718 wps->cred.key_len = wps->new_psk_len * 2; 1719 } 1720 1721use_provided: 1722#ifdef CONFIG_WPS_TESTING 1723 if (wps_testing_dummy_cred) 1724 cred = wpabuf_alloc(200); 1725 else 1726 cred = NULL; 1727 if (cred) { 1728 struct wps_credential dummy; 1729 wpa_printf(MSG_DEBUG, "WPS: Add dummy credential"); 1730 os_memset(&dummy, 0, sizeof(dummy)); 1731 os_memcpy(dummy.ssid, "dummy", 5); 1732 dummy.ssid_len = 5; 1733 dummy.auth_type = WPS_AUTH_WPA2PSK; 1734 dummy.encr_type = WPS_ENCR_AES; 1735 os_memcpy(dummy.key, "dummy psk", 9); 1736 dummy.key_len = 9; 1737 os_memcpy(dummy.mac_addr, wps->mac_addr_e, ETH_ALEN); 1738 wps_build_credential(cred, &dummy); 1739 wpa_hexdump_buf(MSG_DEBUG, "WPS: Dummy Credential", cred); 1740 1741 wpabuf_put_be16(msg, ATTR_CRED); 1742 wpabuf_put_be16(msg, wpabuf_len(cred)); 1743 wpabuf_put_buf(msg, cred); 1744 1745 wpabuf_free(cred); 1746 } 1747#endif /* CONFIG_WPS_TESTING */ 1748 1749 cred = wpabuf_alloc(200); 1750 if (cred == NULL) 1751 return -1; 1752 1753 if (wps_build_credential(cred, &wps->cred)) { 1754 wpabuf_free(cred); 1755 return -1; 1756 } 1757 1758 wpabuf_put_be16(msg, ATTR_CRED); 1759 wpabuf_put_be16(msg, wpabuf_len(cred)); 1760 wpabuf_put_buf(msg, cred); 1761 wpabuf_free(cred); 1762 1763skip_cred_build: 1764 if (wps->wps->registrar->extra_cred) { 1765 wpa_printf(MSG_DEBUG, "WPS: * Credential (pre-configured)"); 1766 wpabuf_put_buf(msg, wps->wps->registrar->extra_cred); 1767 } 1768 1769 return 0; 1770} 1771 1772 1773static int wps_build_ap_settings(struct wps_data *wps, struct wpabuf *msg) 1774{ 1775 wpa_printf(MSG_DEBUG, "WPS: * AP Settings"); 1776 1777 if (wps_build_credential(msg, &wps->cred)) 1778 return -1; 1779 1780 return 0; 1781} 1782 1783 1784static struct wpabuf * wps_build_ap_cred(struct wps_data *wps) 1785{ 1786 struct wpabuf *msg, *plain; 1787 1788 msg = wpabuf_alloc(1000); 1789 if (msg == NULL) 1790 return NULL; 1791 1792 plain = wpabuf_alloc(200); 1793 if (plain == NULL) { 1794 wpabuf_free(msg); 1795 return NULL; 1796 } 1797 1798 if (wps_build_ap_settings(wps, plain)) { 1799 wpabuf_free(plain); 1800 wpabuf_free(msg); 1801 return NULL; 1802 } 1803 1804 wpabuf_put_be16(msg, ATTR_CRED); 1805 wpabuf_put_be16(msg, wpabuf_len(plain)); 1806 wpabuf_put_buf(msg, plain); 1807 wpabuf_free(plain); 1808 1809 return msg; 1810} 1811 1812 1813static struct wpabuf * wps_build_m2(struct wps_data *wps) 1814{ 1815 struct wpabuf *msg; 1816 int config_in_m2 = 0; 1817 1818 if (random_get_bytes(wps->nonce_r, WPS_NONCE_LEN) < 0) 1819 return NULL; 1820 wpa_hexdump(MSG_DEBUG, "WPS: Registrar Nonce", 1821 wps->nonce_r, WPS_NONCE_LEN); 1822 wpa_hexdump(MSG_DEBUG, "WPS: UUID-R", wps->uuid_r, WPS_UUID_LEN); 1823 1824 wpa_printf(MSG_DEBUG, "WPS: Building Message M2"); 1825 msg = wpabuf_alloc(1000); 1826 if (msg == NULL) 1827 return NULL; 1828 1829 if (wps_build_version(msg) || 1830 wps_build_msg_type(msg, WPS_M2) || 1831 wps_build_enrollee_nonce(wps, msg) || 1832 wps_build_registrar_nonce(wps, msg) || 1833 wps_build_uuid_r(wps, msg) || 1834 wps_build_public_key(wps, msg) || 1835 wps_derive_keys(wps) || 1836 wps_build_auth_type_flags(wps, msg) || 1837 wps_build_encr_type_flags(wps, msg) || 1838 wps_build_conn_type_flags(wps, msg) || 1839 wps_build_config_methods_r(wps->wps->registrar, msg) || 1840 wps_build_device_attrs(&wps->wps->dev, msg) || 1841 wps_build_rf_bands(&wps->wps->dev, msg, 1842 wps->wps->rf_band_cb(wps->wps->cb_ctx)) || 1843 wps_build_assoc_state(wps, msg) || 1844 wps_build_config_error(msg, WPS_CFG_NO_ERROR) || 1845 wps_build_dev_password_id(msg, wps->dev_pw_id) || 1846 wps_build_os_version(&wps->wps->dev, msg) || 1847 wps_build_wfa_ext(msg, 0, NULL, 0)) { 1848 wpabuf_free(msg); 1849 return NULL; 1850 } 1851 1852#ifdef CONFIG_WPS_NFC 1853 if (wps->nfc_pw_token && wps->nfc_pw_token->pk_hash_provided_oob && 1854 wps->nfc_pw_token->pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) { 1855 /* 1856 * Use abbreviated handshake since public key hash allowed 1857 * Enrollee to validate our public key similarly to how Enrollee 1858 * public key was validated. There is no need to validate Device 1859 * Password in this case. 1860 */ 1861 struct wpabuf *plain = wpabuf_alloc(500); 1862 if (plain == NULL || 1863 wps_build_cred(wps, plain) || 1864 wps_build_key_wrap_auth(wps, plain) || 1865 wps_build_encr_settings(wps, msg, plain)) { 1866 wpabuf_free(msg); 1867 wpabuf_free(plain); 1868 return NULL; 1869 } 1870 wpabuf_free(plain); 1871 config_in_m2 = 1; 1872 } 1873#endif /* CONFIG_WPS_NFC */ 1874 1875 if (wps_build_authenticator(wps, msg)) { 1876 wpabuf_free(msg); 1877 return NULL; 1878 } 1879 1880 wps->int_reg = 1; 1881 wps->state = config_in_m2 ? RECV_DONE : RECV_M3; 1882 return msg; 1883} 1884 1885 1886static struct wpabuf * wps_build_m2d(struct wps_data *wps) 1887{ 1888 struct wpabuf *msg; 1889 u16 err = wps->config_error; 1890 1891 wpa_printf(MSG_DEBUG, "WPS: Building Message M2D"); 1892 msg = wpabuf_alloc(1000); 1893 if (msg == NULL) 1894 return NULL; 1895 1896 if (wps->wps->ap && wps->wps->ap_setup_locked && 1897 err == WPS_CFG_NO_ERROR) 1898 err = WPS_CFG_SETUP_LOCKED; 1899 1900 if (wps_build_version(msg) || 1901 wps_build_msg_type(msg, WPS_M2D) || 1902 wps_build_enrollee_nonce(wps, msg) || 1903 wps_build_registrar_nonce(wps, msg) || 1904 wps_build_uuid_r(wps, msg) || 1905 wps_build_auth_type_flags(wps, msg) || 1906 wps_build_encr_type_flags(wps, msg) || 1907 wps_build_conn_type_flags(wps, msg) || 1908 wps_build_config_methods_r(wps->wps->registrar, msg) || 1909 wps_build_device_attrs(&wps->wps->dev, msg) || 1910 wps_build_rf_bands(&wps->wps->dev, msg, 1911 wps->wps->rf_band_cb(wps->wps->cb_ctx)) || 1912 wps_build_assoc_state(wps, msg) || 1913 wps_build_config_error(msg, err) || 1914 wps_build_os_version(&wps->wps->dev, msg) || 1915 wps_build_wfa_ext(msg, 0, NULL, 0)) { 1916 wpabuf_free(msg); 1917 return NULL; 1918 } 1919 1920 wps->state = RECV_M2D_ACK; 1921 return msg; 1922} 1923 1924 1925static struct wpabuf * wps_build_m4(struct wps_data *wps) 1926{ 1927 struct wpabuf *msg, *plain; 1928 1929 wpa_printf(MSG_DEBUG, "WPS: Building Message M4"); 1930 1931 wps_derive_psk(wps, wps->dev_password, wps->dev_password_len); 1932 1933 plain = wpabuf_alloc(200); 1934 if (plain == NULL) 1935 return NULL; 1936 1937 msg = wpabuf_alloc(1000); 1938 if (msg == NULL) { 1939 wpabuf_free(plain); 1940 return NULL; 1941 } 1942 1943 if (wps_build_version(msg) || 1944 wps_build_msg_type(msg, WPS_M4) || 1945 wps_build_enrollee_nonce(wps, msg) || 1946 wps_build_r_hash(wps, msg) || 1947 wps_build_r_snonce1(wps, plain) || 1948 wps_build_key_wrap_auth(wps, plain) || 1949 wps_build_encr_settings(wps, msg, plain) || 1950 wps_build_wfa_ext(msg, 0, NULL, 0) || 1951 wps_build_authenticator(wps, msg)) { 1952 wpabuf_free(plain); 1953 wpabuf_free(msg); 1954 return NULL; 1955 } 1956 wpabuf_free(plain); 1957 1958 wps->state = RECV_M5; 1959 return msg; 1960} 1961 1962 1963static struct wpabuf * wps_build_m6(struct wps_data *wps) 1964{ 1965 struct wpabuf *msg, *plain; 1966 1967 wpa_printf(MSG_DEBUG, "WPS: Building Message M6"); 1968 1969 plain = wpabuf_alloc(200); 1970 if (plain == NULL) 1971 return NULL; 1972 1973 msg = wpabuf_alloc(1000); 1974 if (msg == NULL) { 1975 wpabuf_free(plain); 1976 return NULL; 1977 } 1978 1979 if (wps_build_version(msg) || 1980 wps_build_msg_type(msg, WPS_M6) || 1981 wps_build_enrollee_nonce(wps, msg) || 1982 wps_build_r_snonce2(wps, plain) || 1983 wps_build_key_wrap_auth(wps, plain) || 1984 wps_build_encr_settings(wps, msg, plain) || 1985 wps_build_wfa_ext(msg, 0, NULL, 0) || 1986 wps_build_authenticator(wps, msg)) { 1987 wpabuf_free(plain); 1988 wpabuf_free(msg); 1989 return NULL; 1990 } 1991 wpabuf_free(plain); 1992 1993 wps->wps_pin_revealed = 1; 1994 wps->state = RECV_M7; 1995 return msg; 1996} 1997 1998 1999static struct wpabuf * wps_build_m8(struct wps_data *wps) 2000{ 2001 struct wpabuf *msg, *plain; 2002 2003 wpa_printf(MSG_DEBUG, "WPS: Building Message M8"); 2004 2005 plain = wpabuf_alloc(500); 2006 if (plain == NULL) 2007 return NULL; 2008 2009 msg = wpabuf_alloc(1000); 2010 if (msg == NULL) { 2011 wpabuf_free(plain); 2012 return NULL; 2013 } 2014 2015 if (wps_build_version(msg) || 2016 wps_build_msg_type(msg, WPS_M8) || 2017 wps_build_enrollee_nonce(wps, msg) || 2018 ((wps->wps->ap || wps->er) && wps_build_cred(wps, plain)) || 2019 (!wps->wps->ap && !wps->er && wps_build_ap_settings(wps, plain)) || 2020 wps_build_key_wrap_auth(wps, plain) || 2021 wps_build_encr_settings(wps, msg, plain) || 2022 wps_build_wfa_ext(msg, 0, NULL, 0) || 2023 wps_build_authenticator(wps, msg)) { 2024 wpabuf_free(plain); 2025 wpabuf_free(msg); 2026 return NULL; 2027 } 2028 wpabuf_free(plain); 2029 2030 wps->state = RECV_DONE; 2031 return msg; 2032} 2033 2034 2035struct wpabuf * wps_registrar_get_msg(struct wps_data *wps, 2036 enum wsc_op_code *op_code) 2037{ 2038 struct wpabuf *msg; 2039 2040#ifdef CONFIG_WPS_UPNP 2041 if (!wps->int_reg && wps->wps->wps_upnp) { 2042 struct upnp_pending_message *p, *prev = NULL; 2043 if (wps->ext_reg > 1) 2044 wps_registrar_free_pending_m2(wps->wps); 2045 p = wps->wps->upnp_msgs; 2046 /* TODO: check pending message MAC address */ 2047 while (p && p->next) { 2048 prev = p; 2049 p = p->next; 2050 } 2051 if (p) { 2052 wpa_printf(MSG_DEBUG, "WPS: Use pending message from " 2053 "UPnP"); 2054 if (prev) 2055 prev->next = NULL; 2056 else 2057 wps->wps->upnp_msgs = NULL; 2058 msg = p->msg; 2059 switch (p->type) { 2060 case WPS_WSC_ACK: 2061 *op_code = WSC_ACK; 2062 break; 2063 case WPS_WSC_NACK: 2064 *op_code = WSC_NACK; 2065 break; 2066 default: 2067 *op_code = WSC_MSG; 2068 break; 2069 } 2070 os_free(p); 2071 if (wps->ext_reg == 0) 2072 wps->ext_reg = 1; 2073 return msg; 2074 } 2075 } 2076 if (wps->ext_reg) { 2077 wpa_printf(MSG_DEBUG, "WPS: Using external Registrar, but no " 2078 "pending message available"); 2079 return NULL; 2080 } 2081#endif /* CONFIG_WPS_UPNP */ 2082 2083 switch (wps->state) { 2084 case SEND_M2: 2085 if (wps_get_dev_password(wps) < 0) 2086 msg = wps_build_m2d(wps); 2087 else 2088 msg = wps_build_m2(wps); 2089 *op_code = WSC_MSG; 2090 break; 2091 case SEND_M2D: 2092 msg = wps_build_m2d(wps); 2093 *op_code = WSC_MSG; 2094 break; 2095 case SEND_M4: 2096 msg = wps_build_m4(wps); 2097 *op_code = WSC_MSG; 2098 break; 2099 case SEND_M6: 2100 msg = wps_build_m6(wps); 2101 *op_code = WSC_MSG; 2102 break; 2103 case SEND_M8: 2104 msg = wps_build_m8(wps); 2105 *op_code = WSC_MSG; 2106 break; 2107 case RECV_DONE: 2108 msg = wps_build_wsc_ack(wps); 2109 *op_code = WSC_ACK; 2110 break; 2111 case SEND_WSC_NACK: 2112 msg = wps_build_wsc_nack(wps); 2113 *op_code = WSC_NACK; 2114 break; 2115 default: 2116 wpa_printf(MSG_DEBUG, "WPS: Unsupported state %d for building " 2117 "a message", wps->state); 2118 msg = NULL; 2119 break; 2120 } 2121 2122 if (*op_code == WSC_MSG && msg) { 2123 /* Save a copy of the last message for Authenticator derivation 2124 */ 2125 wpabuf_free(wps->last_msg); 2126 wps->last_msg = wpabuf_dup(msg); 2127 } 2128 2129 return msg; 2130} 2131 2132 2133static int wps_process_enrollee_nonce(struct wps_data *wps, const u8 *e_nonce) 2134{ 2135 if (e_nonce == NULL) { 2136 wpa_printf(MSG_DEBUG, "WPS: No Enrollee Nonce received"); 2137 return -1; 2138 } 2139 2140 os_memcpy(wps->nonce_e, e_nonce, WPS_NONCE_LEN); 2141 wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce", 2142 wps->nonce_e, WPS_NONCE_LEN); 2143 2144 return 0; 2145} 2146 2147 2148static int wps_process_registrar_nonce(struct wps_data *wps, const u8 *r_nonce) 2149{ 2150 if (r_nonce == NULL) { 2151 wpa_printf(MSG_DEBUG, "WPS: No Registrar Nonce received"); 2152 return -1; 2153 } 2154 2155 if (os_memcmp(wps->nonce_r, r_nonce, WPS_NONCE_LEN) != 0) { 2156 wpa_printf(MSG_DEBUG, "WPS: Invalid Registrar Nonce received"); 2157 return -1; 2158 } 2159 2160 return 0; 2161} 2162 2163 2164static int wps_process_uuid_e(struct wps_data *wps, const u8 *uuid_e) 2165{ 2166 if (uuid_e == NULL) { 2167 wpa_printf(MSG_DEBUG, "WPS: No UUID-E received"); 2168 return -1; 2169 } 2170 2171 os_memcpy(wps->uuid_e, uuid_e, WPS_UUID_LEN); 2172 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", wps->uuid_e, WPS_UUID_LEN); 2173 2174 return 0; 2175} 2176 2177 2178static int wps_process_dev_password_id(struct wps_data *wps, const u8 *pw_id) 2179{ 2180 if (pw_id == NULL) { 2181 wpa_printf(MSG_DEBUG, "WPS: No Device Password ID received"); 2182 return -1; 2183 } 2184 2185 wps->dev_pw_id = WPA_GET_BE16(pw_id); 2186 wpa_printf(MSG_DEBUG, "WPS: Device Password ID %d", wps->dev_pw_id); 2187 2188 return 0; 2189} 2190 2191 2192static int wps_process_e_hash1(struct wps_data *wps, const u8 *e_hash1) 2193{ 2194 if (e_hash1 == NULL) { 2195 wpa_printf(MSG_DEBUG, "WPS: No E-Hash1 received"); 2196 return -1; 2197 } 2198 2199 os_memcpy(wps->peer_hash1, e_hash1, WPS_HASH_LEN); 2200 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash1", wps->peer_hash1, WPS_HASH_LEN); 2201 2202 return 0; 2203} 2204 2205 2206static int wps_process_e_hash2(struct wps_data *wps, const u8 *e_hash2) 2207{ 2208 if (e_hash2 == NULL) { 2209 wpa_printf(MSG_DEBUG, "WPS: No E-Hash2 received"); 2210 return -1; 2211 } 2212 2213 os_memcpy(wps->peer_hash2, e_hash2, WPS_HASH_LEN); 2214 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash2", wps->peer_hash2, WPS_HASH_LEN); 2215 2216 return 0; 2217} 2218 2219 2220static int wps_process_e_snonce1(struct wps_data *wps, const u8 *e_snonce1) 2221{ 2222 u8 hash[SHA256_MAC_LEN]; 2223 const u8 *addr[4]; 2224 size_t len[4]; 2225 2226 if (e_snonce1 == NULL) { 2227 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce1 received"); 2228 return -1; 2229 } 2230 2231 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce1", e_snonce1, 2232 WPS_SECRET_NONCE_LEN); 2233 2234 /* E-Hash1 = HMAC_AuthKey(E-S1 || PSK1 || PK_E || PK_R) */ 2235 addr[0] = e_snonce1; 2236 len[0] = WPS_SECRET_NONCE_LEN; 2237 addr[1] = wps->psk1; 2238 len[1] = WPS_PSK_LEN; 2239 addr[2] = wpabuf_head(wps->dh_pubkey_e); 2240 len[2] = wpabuf_len(wps->dh_pubkey_e); 2241 addr[3] = wpabuf_head(wps->dh_pubkey_r); 2242 len[3] = wpabuf_len(wps->dh_pubkey_r); 2243 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 2244 2245 if (os_memcmp_const(wps->peer_hash1, hash, WPS_HASH_LEN) != 0) { 2246 wpa_printf(MSG_DEBUG, "WPS: E-Hash1 derived from E-S1 does " 2247 "not match with the pre-committed value"); 2248 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE; 2249 wps_pwd_auth_fail_event(wps->wps, 0, 1, wps->mac_addr_e); 2250 return -1; 2251 } 2252 2253 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the first " 2254 "half of the device password"); 2255 2256 return 0; 2257} 2258 2259 2260static int wps_process_e_snonce2(struct wps_data *wps, const u8 *e_snonce2) 2261{ 2262 u8 hash[SHA256_MAC_LEN]; 2263 const u8 *addr[4]; 2264 size_t len[4]; 2265 2266 if (e_snonce2 == NULL) { 2267 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce2 received"); 2268 return -1; 2269 } 2270 2271 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce2", e_snonce2, 2272 WPS_SECRET_NONCE_LEN); 2273 2274 /* E-Hash2 = HMAC_AuthKey(E-S2 || PSK2 || PK_E || PK_R) */ 2275 addr[0] = e_snonce2; 2276 len[0] = WPS_SECRET_NONCE_LEN; 2277 addr[1] = wps->psk2; 2278 len[1] = WPS_PSK_LEN; 2279 addr[2] = wpabuf_head(wps->dh_pubkey_e); 2280 len[2] = wpabuf_len(wps->dh_pubkey_e); 2281 addr[3] = wpabuf_head(wps->dh_pubkey_r); 2282 len[3] = wpabuf_len(wps->dh_pubkey_r); 2283 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 2284 2285 if (os_memcmp_const(wps->peer_hash2, hash, WPS_HASH_LEN) != 0) { 2286 wpa_printf(MSG_DEBUG, "WPS: E-Hash2 derived from E-S2 does " 2287 "not match with the pre-committed value"); 2288 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e); 2289 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE; 2290 wps_pwd_auth_fail_event(wps->wps, 0, 2, wps->mac_addr_e); 2291 return -1; 2292 } 2293 2294 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the second " 2295 "half of the device password"); 2296 wps->wps_pin_revealed = 0; 2297 wps_registrar_unlock_pin(wps->wps->registrar, wps->uuid_e); 2298 2299 /* 2300 * In case wildcard PIN is used and WPS handshake succeeds in the first 2301 * attempt, wps_registrar_unlock_pin() would not free the PIN, so make 2302 * sure the PIN gets invalidated here. 2303 */ 2304 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e); 2305 2306 return 0; 2307} 2308 2309 2310static int wps_process_mac_addr(struct wps_data *wps, const u8 *mac_addr) 2311{ 2312 if (mac_addr == NULL) { 2313 wpa_printf(MSG_DEBUG, "WPS: No MAC Address received"); 2314 return -1; 2315 } 2316 2317 wpa_printf(MSG_DEBUG, "WPS: Enrollee MAC Address " MACSTR, 2318 MAC2STR(mac_addr)); 2319 os_memcpy(wps->mac_addr_e, mac_addr, ETH_ALEN); 2320 os_memcpy(wps->peer_dev.mac_addr, mac_addr, ETH_ALEN); 2321 2322 return 0; 2323} 2324 2325 2326static int wps_process_pubkey(struct wps_data *wps, const u8 *pk, 2327 size_t pk_len) 2328{ 2329 if (pk == NULL || pk_len == 0) { 2330 wpa_printf(MSG_DEBUG, "WPS: No Public Key received"); 2331 return -1; 2332 } 2333 2334 wpabuf_free(wps->dh_pubkey_e); 2335 wps->dh_pubkey_e = wpabuf_alloc_copy(pk, pk_len); 2336 if (wps->dh_pubkey_e == NULL) 2337 return -1; 2338 2339 return 0; 2340} 2341 2342 2343static int wps_process_auth_type_flags(struct wps_data *wps, const u8 *auth) 2344{ 2345 u16 auth_types; 2346 2347 if (auth == NULL) { 2348 wpa_printf(MSG_DEBUG, "WPS: No Authentication Type flags " 2349 "received"); 2350 return -1; 2351 } 2352 2353 auth_types = WPA_GET_BE16(auth); 2354 2355 wpa_printf(MSG_DEBUG, "WPS: Enrollee Authentication Type flags 0x%x", 2356 auth_types); 2357#ifdef WPS_WORKAROUNDS 2358 /* 2359 * Some deployed implementations seem to advertise incorrect information 2360 * in this attribute. A value of 0x1b (WPA2 + WPA + WPAPSK + OPEN, but 2361 * no WPA2PSK) has been reported to be used. Add WPA2PSK to the list to 2362 * avoid issues with building Credentials that do not use the strongest 2363 * actually supported authentication option (that device does support 2364 * WPA2PSK even when it does not claim it here). 2365 */ 2366 if ((auth_types & 2367 (WPS_AUTH_WPA2 | WPS_AUTH_WPA2PSK | WPS_AUTH_WPAPSK)) == 2368 (WPS_AUTH_WPA2 | WPS_AUTH_WPAPSK)) { 2369 wpa_printf(MSG_DEBUG, 2370 "WPS: Workaround - assume Enrollee supports WPA2PSK based on claimed WPA2 support"); 2371 auth_types |= WPS_AUTH_WPA2PSK; 2372 } 2373#endif /* WPS_WORKAROUNDS */ 2374 wps->auth_type = wps->wps->auth_types & auth_types; 2375 if (wps->auth_type == 0) { 2376 wpa_printf(MSG_DEBUG, "WPS: No match in supported " 2377 "authentication types (own 0x%x Enrollee 0x%x)", 2378 wps->wps->auth_types, auth_types); 2379#ifdef WPS_WORKAROUNDS 2380 /* 2381 * Some deployed implementations seem to advertise incorrect 2382 * information in this attribute. For example, Linksys WRT350N 2383 * seems to have a byteorder bug that breaks this negotiation. 2384 * In order to interoperate with existing implementations, 2385 * assume that the Enrollee supports everything we do. 2386 */ 2387 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee " 2388 "does not advertise supported authentication types " 2389 "correctly"); 2390 wps->auth_type = wps->wps->auth_types; 2391#else /* WPS_WORKAROUNDS */ 2392 return -1; 2393#endif /* WPS_WORKAROUNDS */ 2394 } 2395 2396 return 0; 2397} 2398 2399 2400static int wps_process_encr_type_flags(struct wps_data *wps, const u8 *encr) 2401{ 2402 u16 encr_types; 2403 2404 if (encr == NULL) { 2405 wpa_printf(MSG_DEBUG, "WPS: No Encryption Type flags " 2406 "received"); 2407 return -1; 2408 } 2409 2410 encr_types = WPA_GET_BE16(encr); 2411 2412 wpa_printf(MSG_DEBUG, "WPS: Enrollee Encryption Type flags 0x%x", 2413 encr_types); 2414 wps->encr_type = wps->wps->encr_types & encr_types; 2415 if (wps->encr_type == 0) { 2416 wpa_printf(MSG_DEBUG, "WPS: No match in supported " 2417 "encryption types (own 0x%x Enrollee 0x%x)", 2418 wps->wps->encr_types, encr_types); 2419#ifdef WPS_WORKAROUNDS 2420 /* 2421 * Some deployed implementations seem to advertise incorrect 2422 * information in this attribute. For example, Linksys WRT350N 2423 * seems to have a byteorder bug that breaks this negotiation. 2424 * In order to interoperate with existing implementations, 2425 * assume that the Enrollee supports everything we do. 2426 */ 2427 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee " 2428 "does not advertise supported encryption types " 2429 "correctly"); 2430 wps->encr_type = wps->wps->encr_types; 2431#else /* WPS_WORKAROUNDS */ 2432 return -1; 2433#endif /* WPS_WORKAROUNDS */ 2434 } 2435 2436 return 0; 2437} 2438 2439 2440static int wps_process_conn_type_flags(struct wps_data *wps, const u8 *conn) 2441{ 2442 if (conn == NULL) { 2443 wpa_printf(MSG_DEBUG, "WPS: No Connection Type flags " 2444 "received"); 2445 return -1; 2446 } 2447 2448 wpa_printf(MSG_DEBUG, "WPS: Enrollee Connection Type flags 0x%x", 2449 *conn); 2450 2451 return 0; 2452} 2453 2454 2455static int wps_process_config_methods(struct wps_data *wps, const u8 *methods) 2456{ 2457 u16 m; 2458 2459 if (methods == NULL) { 2460 wpa_printf(MSG_DEBUG, "WPS: No Config Methods received"); 2461 return -1; 2462 } 2463 2464 m = WPA_GET_BE16(methods); 2465 2466 wpa_printf(MSG_DEBUG, "WPS: Enrollee Config Methods 0x%x" 2467 "%s%s%s%s%s%s%s%s%s", m, 2468 m & WPS_CONFIG_USBA ? " [USBA]" : "", 2469 m & WPS_CONFIG_ETHERNET ? " [Ethernet]" : "", 2470 m & WPS_CONFIG_LABEL ? " [Label]" : "", 2471 m & WPS_CONFIG_DISPLAY ? " [Display]" : "", 2472 m & WPS_CONFIG_EXT_NFC_TOKEN ? " [Ext NFC Token]" : "", 2473 m & WPS_CONFIG_INT_NFC_TOKEN ? " [Int NFC Token]" : "", 2474 m & WPS_CONFIG_NFC_INTERFACE ? " [NFC]" : "", 2475 m & WPS_CONFIG_PUSHBUTTON ? " [PBC]" : "", 2476 m & WPS_CONFIG_KEYPAD ? " [Keypad]" : ""); 2477 2478 if (!(m & WPS_CONFIG_DISPLAY) && !wps->use_psk_key) { 2479 /* 2480 * The Enrollee does not have a display so it is unlikely to be 2481 * able to show the passphrase to a user and as such, could 2482 * benefit from receiving PSK to reduce key derivation time. 2483 */ 2484 wpa_printf(MSG_DEBUG, "WPS: Prefer PSK format key due to " 2485 "Enrollee not supporting display"); 2486 wps->use_psk_key = 1; 2487 } 2488 2489 return 0; 2490} 2491 2492 2493static int wps_process_wps_state(struct wps_data *wps, const u8 *state) 2494{ 2495 if (state == NULL) { 2496 wpa_printf(MSG_DEBUG, "WPS: No Wi-Fi Protected Setup State " 2497 "received"); 2498 return -1; 2499 } 2500 2501 wpa_printf(MSG_DEBUG, "WPS: Enrollee Wi-Fi Protected Setup State %d", 2502 *state); 2503 2504 return 0; 2505} 2506 2507 2508static int wps_process_assoc_state(struct wps_data *wps, const u8 *assoc) 2509{ 2510 u16 a; 2511 2512 if (assoc == NULL) { 2513 wpa_printf(MSG_DEBUG, "WPS: No Association State received"); 2514 return -1; 2515 } 2516 2517 a = WPA_GET_BE16(assoc); 2518 wpa_printf(MSG_DEBUG, "WPS: Enrollee Association State %d", a); 2519 2520 return 0; 2521} 2522 2523 2524static int wps_process_config_error(struct wps_data *wps, const u8 *err) 2525{ 2526 u16 e; 2527 2528 if (err == NULL) { 2529 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error received"); 2530 return -1; 2531 } 2532 2533 e = WPA_GET_BE16(err); 2534 wpa_printf(MSG_DEBUG, "WPS: Enrollee Configuration Error %d", e); 2535 2536 return 0; 2537} 2538 2539 2540static int wps_registrar_p2p_dev_addr_match(struct wps_data *wps) 2541{ 2542#ifdef CONFIG_P2P 2543 struct wps_registrar *reg = wps->wps->registrar; 2544 2545 if (is_zero_ether_addr(reg->p2p_dev_addr)) 2546 return 1; /* no filtering in use */ 2547 2548 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) != 0) { 2549 wpa_printf(MSG_DEBUG, "WPS: No match on P2P Device Address " 2550 "filtering for PBC: expected " MACSTR " was " 2551 MACSTR " - indicate PBC session overlap", 2552 MAC2STR(reg->p2p_dev_addr), 2553 MAC2STR(wps->p2p_dev_addr)); 2554 return 0; 2555 } 2556#endif /* CONFIG_P2P */ 2557 return 1; 2558} 2559 2560 2561static int wps_registrar_skip_overlap(struct wps_data *wps) 2562{ 2563#ifdef CONFIG_P2P 2564 struct wps_registrar *reg = wps->wps->registrar; 2565 2566 if (is_zero_ether_addr(reg->p2p_dev_addr)) 2567 return 0; /* no specific Enrollee selected */ 2568 2569 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) == 0) { 2570 wpa_printf(MSG_DEBUG, "WPS: Skip PBC overlap due to selected " 2571 "Enrollee match"); 2572 return 1; 2573 } 2574#endif /* CONFIG_P2P */ 2575 return 0; 2576} 2577 2578 2579static enum wps_process_res wps_process_m1(struct wps_data *wps, 2580 struct wps_parse_attr *attr) 2581{ 2582 wpa_printf(MSG_DEBUG, "WPS: Received M1"); 2583 2584 if (wps->state != RECV_M1) { 2585 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2586 "receiving M1", wps->state); 2587 return WPS_FAILURE; 2588 } 2589 2590 if (wps_process_uuid_e(wps, attr->uuid_e) || 2591 wps_process_mac_addr(wps, attr->mac_addr) || 2592 wps_process_enrollee_nonce(wps, attr->enrollee_nonce) || 2593 wps_process_pubkey(wps, attr->public_key, attr->public_key_len) || 2594 wps_process_auth_type_flags(wps, attr->auth_type_flags) || 2595 wps_process_encr_type_flags(wps, attr->encr_type_flags) || 2596 wps_process_conn_type_flags(wps, attr->conn_type_flags) || 2597 wps_process_config_methods(wps, attr->config_methods) || 2598 wps_process_wps_state(wps, attr->wps_state) || 2599 wps_process_device_attrs(&wps->peer_dev, attr) || 2600 wps_process_rf_bands(&wps->peer_dev, attr->rf_bands) || 2601 wps_process_assoc_state(wps, attr->assoc_state) || 2602 wps_process_dev_password_id(wps, attr->dev_password_id) || 2603 wps_process_config_error(wps, attr->config_error) || 2604 wps_process_os_version(&wps->peer_dev, attr->os_version)) 2605 return WPS_FAILURE; 2606 2607 if (wps->dev_pw_id < 0x10 && 2608 wps->dev_pw_id != DEV_PW_DEFAULT && 2609 wps->dev_pw_id != DEV_PW_P2PS_DEFAULT && 2610 wps->dev_pw_id != DEV_PW_USER_SPECIFIED && 2611 wps->dev_pw_id != DEV_PW_MACHINE_SPECIFIED && 2612 wps->dev_pw_id != DEV_PW_REGISTRAR_SPECIFIED && 2613#ifdef CONFIG_WPS_NFC 2614 wps->dev_pw_id != DEV_PW_NFC_CONNECTION_HANDOVER && 2615#endif /* CONFIG_WPS_NFC */ 2616 (wps->dev_pw_id != DEV_PW_PUSHBUTTON || 2617 !wps->wps->registrar->pbc)) { 2618 wpa_printf(MSG_DEBUG, "WPS: Unsupported Device Password ID %d", 2619 wps->dev_pw_id); 2620 wps->state = SEND_M2D; 2621 return WPS_CONTINUE; 2622 } 2623 2624#ifdef CONFIG_WPS_NFC 2625 if (wps->dev_pw_id >= 0x10 || 2626 wps->dev_pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) { 2627 struct wps_nfc_pw_token *token; 2628 const u8 *addr[1]; 2629 u8 hash[WPS_HASH_LEN]; 2630 2631 wpa_printf(MSG_DEBUG, "WPS: Searching for NFC token match for id=%d (ctx %p registrar %p)", 2632 wps->dev_pw_id, wps->wps, wps->wps->registrar); 2633 token = wps_get_nfc_pw_token( 2634 &wps->wps->registrar->nfc_pw_tokens, wps->dev_pw_id); 2635 if (token && token->peer_pk_hash_known) { 2636 size_t len; 2637 2638 wpa_printf(MSG_DEBUG, "WPS: Found matching NFC " 2639 "Password Token"); 2640 dl_list_del(&token->list); 2641 wps->nfc_pw_token = token; 2642 2643 addr[0] = attr->public_key; 2644 len = attr->public_key_len; 2645 sha256_vector(1, addr, &len, hash); 2646 if (os_memcmp_const(hash, 2647 wps->nfc_pw_token->pubkey_hash, 2648 WPS_OOB_PUBKEY_HASH_LEN) != 0) { 2649 wpa_printf(MSG_ERROR, "WPS: Public Key hash " 2650 "mismatch"); 2651 wps->state = SEND_M2D; 2652 wps->config_error = 2653 WPS_CFG_PUBLIC_KEY_HASH_MISMATCH; 2654 return WPS_CONTINUE; 2655 } 2656 } else if (token) { 2657 wpa_printf(MSG_DEBUG, "WPS: Found matching NFC " 2658 "Password Token (no peer PK hash)"); 2659 wps->nfc_pw_token = token; 2660 } else if (wps->dev_pw_id >= 0x10 && 2661 wps->wps->ap_nfc_dev_pw_id == wps->dev_pw_id && 2662 wps->wps->ap_nfc_dev_pw) { 2663 wpa_printf(MSG_DEBUG, "WPS: Found match with own NFC Password Token"); 2664 } 2665 } 2666#endif /* CONFIG_WPS_NFC */ 2667 2668 if (wps->dev_pw_id == DEV_PW_PUSHBUTTON) { 2669 if ((wps->wps->registrar->force_pbc_overlap || 2670 wps_registrar_pbc_overlap(wps->wps->registrar, 2671 wps->mac_addr_e, wps->uuid_e) || 2672 !wps_registrar_p2p_dev_addr_match(wps)) && 2673 !wps_registrar_skip_overlap(wps)) { 2674 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - deny PBC " 2675 "negotiation"); 2676 wps->state = SEND_M2D; 2677 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2678 wps_pbc_overlap_event(wps->wps); 2679 wps_fail_event(wps->wps, WPS_M1, 2680 WPS_CFG_MULTIPLE_PBC_DETECTED, 2681 WPS_EI_NO_ERROR, wps->mac_addr_e); 2682 wps->wps->registrar->force_pbc_overlap = 1; 2683 return WPS_CONTINUE; 2684 } 2685 wps_registrar_add_pbc_session(wps->wps->registrar, 2686 wps->mac_addr_e, wps->uuid_e); 2687 wps->pbc = 1; 2688 } 2689 2690#ifdef WPS_WORKAROUNDS 2691 /* 2692 * It looks like Mac OS X 10.6.3 and 10.6.4 do not like Network Key in 2693 * passphrase format. To avoid interop issues, force PSK format to be 2694 * used. 2695 */ 2696 if (!wps->use_psk_key && 2697 wps->peer_dev.manufacturer && 2698 os_strncmp(wps->peer_dev.manufacturer, "Apple ", 6) == 0 && 2699 wps->peer_dev.model_name && 2700 os_strcmp(wps->peer_dev.model_name, "AirPort") == 0) { 2701 wpa_printf(MSG_DEBUG, "WPS: Workaround - Force Network Key in " 2702 "PSK format"); 2703 wps->use_psk_key = 1; 2704 } 2705#endif /* WPS_WORKAROUNDS */ 2706 2707 wps->state = SEND_M2; 2708 return WPS_CONTINUE; 2709} 2710 2711 2712static enum wps_process_res wps_process_m3(struct wps_data *wps, 2713 const struct wpabuf *msg, 2714 struct wps_parse_attr *attr) 2715{ 2716 wpa_printf(MSG_DEBUG, "WPS: Received M3"); 2717 2718 if (wps->state != RECV_M3) { 2719 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2720 "receiving M3", wps->state); 2721 wps->state = SEND_WSC_NACK; 2722 return WPS_CONTINUE; 2723 } 2724 2725 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2726 !wps_registrar_skip_overlap(wps)) { 2727 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2728 "session overlap"); 2729 wps->state = SEND_WSC_NACK; 2730 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2731 return WPS_CONTINUE; 2732 } 2733 2734 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2735 wps_process_authenticator(wps, attr->authenticator, msg) || 2736 wps_process_e_hash1(wps, attr->e_hash1) || 2737 wps_process_e_hash2(wps, attr->e_hash2)) { 2738 wps->state = SEND_WSC_NACK; 2739 return WPS_CONTINUE; 2740 } 2741 2742 wps->state = SEND_M4; 2743 return WPS_CONTINUE; 2744} 2745 2746 2747static enum wps_process_res wps_process_m5(struct wps_data *wps, 2748 const struct wpabuf *msg, 2749 struct wps_parse_attr *attr) 2750{ 2751 struct wpabuf *decrypted; 2752 struct wps_parse_attr eattr; 2753 2754 wpa_printf(MSG_DEBUG, "WPS: Received M5"); 2755 2756 if (wps->state != RECV_M5) { 2757 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2758 "receiving M5", wps->state); 2759 wps->state = SEND_WSC_NACK; 2760 return WPS_CONTINUE; 2761 } 2762 2763 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2764 !wps_registrar_skip_overlap(wps)) { 2765 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2766 "session overlap"); 2767 wps->state = SEND_WSC_NACK; 2768 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2769 return WPS_CONTINUE; 2770 } 2771 2772 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2773 wps_process_authenticator(wps, attr->authenticator, msg)) { 2774 wps->state = SEND_WSC_NACK; 2775 return WPS_CONTINUE; 2776 } 2777 2778 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings, 2779 attr->encr_settings_len); 2780 if (decrypted == NULL) { 2781 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted " 2782 "Settings attribute"); 2783 wps->state = SEND_WSC_NACK; 2784 return WPS_CONTINUE; 2785 } 2786 2787 if (wps_validate_m5_encr(decrypted, attr->version2 != NULL) < 0) { 2788 wpabuf_free(decrypted); 2789 wps->state = SEND_WSC_NACK; 2790 return WPS_CONTINUE; 2791 } 2792 2793 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings " 2794 "attribute"); 2795 if (wps_parse_msg(decrypted, &eattr) < 0 || 2796 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) || 2797 wps_process_e_snonce1(wps, eattr.e_snonce1)) { 2798 wpabuf_free(decrypted); 2799 wps->state = SEND_WSC_NACK; 2800 return WPS_CONTINUE; 2801 } 2802 wpabuf_free(decrypted); 2803 2804 wps->state = SEND_M6; 2805 return WPS_CONTINUE; 2806} 2807 2808 2809static void wps_sta_cred_cb(struct wps_data *wps) 2810{ 2811 /* 2812 * Update credential to only include a single authentication and 2813 * encryption type in case the AP configuration includes more than one 2814 * option. 2815 */ 2816 if (wps->cred.auth_type & WPS_AUTH_WPA2PSK) 2817 wps->cred.auth_type = WPS_AUTH_WPA2PSK; 2818 else if (wps->cred.auth_type & WPS_AUTH_WPAPSK) 2819 wps->cred.auth_type = WPS_AUTH_WPAPSK; 2820 if (wps->cred.encr_type & WPS_ENCR_AES) 2821 wps->cred.encr_type = WPS_ENCR_AES; 2822 else if (wps->cred.encr_type & WPS_ENCR_TKIP) 2823 wps->cred.encr_type = WPS_ENCR_TKIP; 2824 wpa_printf(MSG_DEBUG, "WPS: Update local configuration based on the " 2825 "AP configuration"); 2826 if (wps->wps->cred_cb) 2827 wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred); 2828} 2829 2830 2831static void wps_cred_update(struct wps_credential *dst, 2832 struct wps_credential *src) 2833{ 2834 os_memcpy(dst->ssid, src->ssid, sizeof(dst->ssid)); 2835 dst->ssid_len = src->ssid_len; 2836 dst->auth_type = src->auth_type; 2837 dst->encr_type = src->encr_type; 2838 dst->key_idx = src->key_idx; 2839 os_memcpy(dst->key, src->key, sizeof(dst->key)); 2840 dst->key_len = src->key_len; 2841} 2842 2843 2844static int wps_process_ap_settings_r(struct wps_data *wps, 2845 struct wps_parse_attr *attr) 2846{ 2847 struct wpabuf *msg; 2848 2849 if (wps->wps->ap || wps->er) 2850 return 0; 2851 2852 /* AP Settings Attributes in M7 when Enrollee is an AP */ 2853 if (wps_process_ap_settings(attr, &wps->cred) < 0) 2854 return -1; 2855 2856 wpa_printf(MSG_INFO, "WPS: Received old AP configuration from AP"); 2857 2858 if (wps->new_ap_settings) { 2859 wpa_printf(MSG_INFO, "WPS: Update AP configuration based on " 2860 "new settings"); 2861 wps_cred_update(&wps->cred, wps->new_ap_settings); 2862 return 0; 2863 } else { 2864 /* 2865 * Use the AP PIN only to receive the current AP settings, not 2866 * to reconfigure the AP. 2867 */ 2868 2869 /* 2870 * Clear selected registrar here since we do not get to 2871 * WSC_Done in this protocol run. 2872 */ 2873 wps_registrar_pin_completed(wps->wps->registrar); 2874 2875 msg = wps_build_ap_cred(wps); 2876 if (msg == NULL) 2877 return -1; 2878 wps->cred.cred_attr = wpabuf_head(msg); 2879 wps->cred.cred_attr_len = wpabuf_len(msg); 2880 2881 if (wps->ap_settings_cb) { 2882 wps->ap_settings_cb(wps->ap_settings_cb_ctx, 2883 &wps->cred); 2884 wpabuf_free(msg); 2885 return 1; 2886 } 2887 wps_sta_cred_cb(wps); 2888 2889 wps->cred.cred_attr = NULL; 2890 wps->cred.cred_attr_len = 0; 2891 wpabuf_free(msg); 2892 2893 return 1; 2894 } 2895} 2896 2897 2898static enum wps_process_res wps_process_m7(struct wps_data *wps, 2899 const struct wpabuf *msg, 2900 struct wps_parse_attr *attr) 2901{ 2902 struct wpabuf *decrypted; 2903 struct wps_parse_attr eattr; 2904 2905 wpa_printf(MSG_DEBUG, "WPS: Received M7"); 2906 2907 if (wps->state != RECV_M7) { 2908 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2909 "receiving M7", wps->state); 2910 wps->state = SEND_WSC_NACK; 2911 return WPS_CONTINUE; 2912 } 2913 2914 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2915 !wps_registrar_skip_overlap(wps)) { 2916 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2917 "session overlap"); 2918 wps->state = SEND_WSC_NACK; 2919 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2920 return WPS_CONTINUE; 2921 } 2922 2923 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2924 wps_process_authenticator(wps, attr->authenticator, msg)) { 2925 wps->state = SEND_WSC_NACK; 2926 return WPS_CONTINUE; 2927 } 2928 2929 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings, 2930 attr->encr_settings_len); 2931 if (decrypted == NULL) { 2932 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypt Encrypted " 2933 "Settings attribute"); 2934 wps->state = SEND_WSC_NACK; 2935 return WPS_CONTINUE; 2936 } 2937 2938 if (wps_validate_m7_encr(decrypted, wps->wps->ap || wps->er, 2939 attr->version2 != NULL) < 0) { 2940 wpabuf_free(decrypted); 2941 wps->state = SEND_WSC_NACK; 2942 return WPS_CONTINUE; 2943 } 2944 2945 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings " 2946 "attribute"); 2947 if (wps_parse_msg(decrypted, &eattr) < 0 || 2948 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) || 2949 wps_process_e_snonce2(wps, eattr.e_snonce2) || 2950 wps_process_ap_settings_r(wps, &eattr)) { 2951 wpabuf_free(decrypted); 2952 wps->state = SEND_WSC_NACK; 2953 return WPS_CONTINUE; 2954 } 2955 2956 wpabuf_free(decrypted); 2957 2958 wps->state = SEND_M8; 2959 return WPS_CONTINUE; 2960} 2961 2962 2963static enum wps_process_res wps_process_wsc_msg(struct wps_data *wps, 2964 const struct wpabuf *msg) 2965{ 2966 struct wps_parse_attr attr; 2967 enum wps_process_res ret = WPS_CONTINUE; 2968 2969 wpa_printf(MSG_DEBUG, "WPS: Received WSC_MSG"); 2970 2971 if (wps_parse_msg(msg, &attr) < 0) 2972 return WPS_FAILURE; 2973 2974 if (attr.msg_type == NULL) { 2975 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 2976 wps->state = SEND_WSC_NACK; 2977 return WPS_CONTINUE; 2978 } 2979 2980 if (*attr.msg_type != WPS_M1 && 2981 (attr.registrar_nonce == NULL || 2982 os_memcmp(wps->nonce_r, attr.registrar_nonce, 2983 WPS_NONCE_LEN) != 0)) { 2984 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 2985 return WPS_FAILURE; 2986 } 2987 2988 switch (*attr.msg_type) { 2989 case WPS_M1: 2990 if (wps_validate_m1(msg) < 0) 2991 return WPS_FAILURE; 2992#ifdef CONFIG_WPS_UPNP 2993 if (wps->wps->wps_upnp && attr.mac_addr) { 2994 /* Remove old pending messages when starting new run */ 2995 wps_free_pending_msgs(wps->wps->upnp_msgs); 2996 wps->wps->upnp_msgs = NULL; 2997 2998 upnp_wps_device_send_wlan_event( 2999 wps->wps->wps_upnp, attr.mac_addr, 3000 UPNP_WPS_WLANEVENT_TYPE_EAP, msg); 3001 } 3002#endif /* CONFIG_WPS_UPNP */ 3003 ret = wps_process_m1(wps, &attr); 3004 break; 3005 case WPS_M3: 3006 if (wps_validate_m3(msg) < 0) 3007 return WPS_FAILURE; 3008 ret = wps_process_m3(wps, msg, &attr); 3009 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 3010 wps_fail_event(wps->wps, WPS_M3, wps->config_error, 3011 wps->error_indication, wps->mac_addr_e); 3012 break; 3013 case WPS_M5: 3014 if (wps_validate_m5(msg) < 0) 3015 return WPS_FAILURE; 3016 ret = wps_process_m5(wps, msg, &attr); 3017 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 3018 wps_fail_event(wps->wps, WPS_M5, wps->config_error, 3019 wps->error_indication, wps->mac_addr_e); 3020 break; 3021 case WPS_M7: 3022 if (wps_validate_m7(msg) < 0) 3023 return WPS_FAILURE; 3024 ret = wps_process_m7(wps, msg, &attr); 3025 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 3026 wps_fail_event(wps->wps, WPS_M7, wps->config_error, 3027 wps->error_indication, wps->mac_addr_e); 3028 break; 3029 default: 3030 wpa_printf(MSG_DEBUG, "WPS: Unsupported Message Type %d", 3031 *attr.msg_type); 3032 return WPS_FAILURE; 3033 } 3034 3035 if (ret == WPS_CONTINUE) { 3036 /* Save a copy of the last message for Authenticator derivation 3037 */ 3038 wpabuf_free(wps->last_msg); 3039 wps->last_msg = wpabuf_dup(msg); 3040 } 3041 3042 return ret; 3043} 3044 3045 3046static enum wps_process_res wps_process_wsc_ack(struct wps_data *wps, 3047 const struct wpabuf *msg) 3048{ 3049 struct wps_parse_attr attr; 3050 3051 wpa_printf(MSG_DEBUG, "WPS: Received WSC_ACK"); 3052 3053 if (wps_parse_msg(msg, &attr) < 0) 3054 return WPS_FAILURE; 3055 3056 if (attr.msg_type == NULL) { 3057 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3058 return WPS_FAILURE; 3059 } 3060 3061 if (*attr.msg_type != WPS_WSC_ACK) { 3062 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 3063 *attr.msg_type); 3064 return WPS_FAILURE; 3065 } 3066 3067#ifdef CONFIG_WPS_UPNP 3068 if (wps->wps->wps_upnp && wps->ext_reg && wps->state == RECV_M2D_ACK && 3069 upnp_wps_subscribers(wps->wps->wps_upnp)) { 3070 if (wps->wps->upnp_msgs) 3071 return WPS_CONTINUE; 3072 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an " 3073 "external Registrar"); 3074 return WPS_PENDING; 3075 } 3076#endif /* CONFIG_WPS_UPNP */ 3077 3078 if (attr.registrar_nonce == NULL || 3079 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 3080 { 3081 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3082 return WPS_FAILURE; 3083 } 3084 3085 if (attr.enrollee_nonce == NULL || 3086 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 3087 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 3088 return WPS_FAILURE; 3089 } 3090 3091 if (wps->state == RECV_M2D_ACK) { 3092#ifdef CONFIG_WPS_UPNP 3093 if (wps->wps->wps_upnp && 3094 upnp_wps_subscribers(wps->wps->wps_upnp)) { 3095 if (wps->wps->upnp_msgs) 3096 return WPS_CONTINUE; 3097 if (wps->ext_reg == 0) 3098 wps->ext_reg = 1; 3099 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an " 3100 "external Registrar"); 3101 return WPS_PENDING; 3102 } 3103#endif /* CONFIG_WPS_UPNP */ 3104 3105 wpa_printf(MSG_DEBUG, "WPS: No more registrars available - " 3106 "terminate negotiation"); 3107 } 3108 3109 return WPS_FAILURE; 3110} 3111 3112 3113static enum wps_process_res wps_process_wsc_nack(struct wps_data *wps, 3114 const struct wpabuf *msg) 3115{ 3116 struct wps_parse_attr attr; 3117 int old_state; 3118 u16 config_error; 3119 3120 wpa_printf(MSG_DEBUG, "WPS: Received WSC_NACK"); 3121 3122 old_state = wps->state; 3123 wps->state = SEND_WSC_NACK; 3124 3125 if (wps_parse_msg(msg, &attr) < 0) 3126 return WPS_FAILURE; 3127 3128 if (attr.msg_type == NULL) { 3129 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3130 return WPS_FAILURE; 3131 } 3132 3133 if (*attr.msg_type != WPS_WSC_NACK) { 3134 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 3135 *attr.msg_type); 3136 return WPS_FAILURE; 3137 } 3138 3139#ifdef CONFIG_WPS_UPNP 3140 if (wps->wps->wps_upnp && wps->ext_reg) { 3141 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external " 3142 "Registrar terminated by the Enrollee"); 3143 return WPS_FAILURE; 3144 } 3145#endif /* CONFIG_WPS_UPNP */ 3146 3147 if (attr.registrar_nonce == NULL || 3148 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 3149 { 3150 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3151 return WPS_FAILURE; 3152 } 3153 3154 if (attr.enrollee_nonce == NULL || 3155 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 3156 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 3157 return WPS_FAILURE; 3158 } 3159 3160 if (attr.config_error == NULL) { 3161 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error attribute " 3162 "in WSC_NACK"); 3163 return WPS_FAILURE; 3164 } 3165 3166 config_error = WPA_GET_BE16(attr.config_error); 3167 wpa_printf(MSG_DEBUG, "WPS: Enrollee terminated negotiation with " 3168 "Configuration Error %d", config_error); 3169 3170 switch (old_state) { 3171 case RECV_M3: 3172 wps_fail_event(wps->wps, WPS_M2, config_error, 3173 wps->error_indication, wps->mac_addr_e); 3174 break; 3175 case RECV_M5: 3176 wps_fail_event(wps->wps, WPS_M4, config_error, 3177 wps->error_indication, wps->mac_addr_e); 3178 break; 3179 case RECV_M7: 3180 wps_fail_event(wps->wps, WPS_M6, config_error, 3181 wps->error_indication, wps->mac_addr_e); 3182 break; 3183 case RECV_DONE: 3184 wps_fail_event(wps->wps, WPS_M8, config_error, 3185 wps->error_indication, wps->mac_addr_e); 3186 break; 3187 default: 3188 break; 3189 } 3190 3191 return WPS_FAILURE; 3192} 3193 3194 3195static enum wps_process_res wps_process_wsc_done(struct wps_data *wps, 3196 const struct wpabuf *msg) 3197{ 3198 struct wps_parse_attr attr; 3199 3200 wpa_printf(MSG_DEBUG, "WPS: Received WSC_Done"); 3201 3202 if (wps->state != RECV_DONE && 3203 (!wps->wps->wps_upnp || !wps->ext_reg)) { 3204 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 3205 "receiving WSC_Done", wps->state); 3206 return WPS_FAILURE; 3207 } 3208 3209 if (wps_parse_msg(msg, &attr) < 0) 3210 return WPS_FAILURE; 3211 3212 if (attr.msg_type == NULL) { 3213 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3214 return WPS_FAILURE; 3215 } 3216 3217 if (*attr.msg_type != WPS_WSC_DONE) { 3218 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 3219 *attr.msg_type); 3220 return WPS_FAILURE; 3221 } 3222 3223#ifdef CONFIG_WPS_UPNP 3224 if (wps->wps->wps_upnp && wps->ext_reg) { 3225 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external " 3226 "Registrar completed successfully"); 3227 wps_device_store(wps->wps->registrar, &wps->peer_dev, 3228 wps->uuid_e); 3229 return WPS_DONE; 3230 } 3231#endif /* CONFIG_WPS_UPNP */ 3232 3233 if (attr.registrar_nonce == NULL || 3234 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 3235 { 3236 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3237 return WPS_FAILURE; 3238 } 3239 3240 if (attr.enrollee_nonce == NULL || 3241 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 3242 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 3243 return WPS_FAILURE; 3244 } 3245 3246 wpa_printf(MSG_DEBUG, "WPS: Negotiation completed successfully"); 3247 wps_device_store(wps->wps->registrar, &wps->peer_dev, 3248 wps->uuid_e); 3249 3250 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->new_psk && 3251 wps->wps->ap && !wps->wps->registrar->disable_auto_conf) { 3252 struct wps_credential cred; 3253 3254 wpa_printf(MSG_DEBUG, "WPS: Moving to Configured state based " 3255 "on first Enrollee connection"); 3256 3257 os_memset(&cred, 0, sizeof(cred)); 3258 os_memcpy(cred.ssid, wps->wps->ssid, wps->wps->ssid_len); 3259 cred.ssid_len = wps->wps->ssid_len; 3260 if (wps->wps->rf_band_cb(wps->wps->cb_ctx) == WPS_RF_60GHZ) { 3261 cred.auth_type = WPS_AUTH_WPA2PSK; 3262 cred.encr_type = WPS_ENCR_AES; 3263 } else { 3264 cred.auth_type = WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK; 3265 cred.encr_type = WPS_ENCR_TKIP | WPS_ENCR_AES; 3266 } 3267 os_memcpy(cred.key, wps->new_psk, wps->new_psk_len); 3268 cred.key_len = wps->new_psk_len; 3269 3270 wps->wps->wps_state = WPS_STATE_CONFIGURED; 3271 wpa_hexdump_ascii_key(MSG_DEBUG, 3272 "WPS: Generated random passphrase", 3273 wps->new_psk, wps->new_psk_len); 3274 if (wps->wps->cred_cb) 3275 wps->wps->cred_cb(wps->wps->cb_ctx, &cred); 3276 3277 os_free(wps->new_psk); 3278 wps->new_psk = NULL; 3279 } 3280 3281 if (!wps->wps->ap && !wps->er) 3282 wps_sta_cred_cb(wps); 3283 3284 if (wps->new_psk) { 3285 if (wps_cb_new_psk(wps->wps->registrar, wps->mac_addr_e, 3286 wps->p2p_dev_addr, wps->new_psk, 3287 wps->new_psk_len)) { 3288 wpa_printf(MSG_DEBUG, "WPS: Failed to configure the " 3289 "new PSK"); 3290 } 3291 os_free(wps->new_psk); 3292 wps->new_psk = NULL; 3293 } 3294 3295 wps_cb_reg_success(wps->wps->registrar, wps->mac_addr_e, wps->uuid_e, 3296 wps->dev_password, wps->dev_password_len); 3297 3298 if (wps->pbc) { 3299 wps_registrar_remove_pbc_session(wps->wps->registrar, 3300 wps->uuid_e, 3301 wps->p2p_dev_addr); 3302 wps_registrar_pbc_completed(wps->wps->registrar); 3303#ifdef WPS_WORKAROUNDS 3304 os_get_reltime(&wps->wps->registrar->pbc_ignore_start); 3305#endif /* WPS_WORKAROUNDS */ 3306 os_memcpy(wps->wps->registrar->pbc_ignore_uuid, wps->uuid_e, 3307 WPS_UUID_LEN); 3308 } else { 3309 wps_registrar_pin_completed(wps->wps->registrar); 3310 } 3311 /* TODO: maintain AuthorizedMACs somewhere separately for each ER and 3312 * merge them into APs own list.. */ 3313 3314 wps_success_event(wps->wps, wps->mac_addr_e); 3315 3316 return WPS_DONE; 3317} 3318 3319 3320enum wps_process_res wps_registrar_process_msg(struct wps_data *wps, 3321 enum wsc_op_code op_code, 3322 const struct wpabuf *msg) 3323{ 3324 enum wps_process_res ret; 3325 3326 wpa_printf(MSG_DEBUG, "WPS: Processing received message (len=%lu " 3327 "op_code=%d)", 3328 (unsigned long) wpabuf_len(msg), op_code); 3329 3330#ifdef CONFIG_WPS_UPNP 3331 if (wps->wps->wps_upnp && op_code == WSC_MSG && wps->ext_reg == 1) { 3332 struct wps_parse_attr attr; 3333 if (wps_parse_msg(msg, &attr) == 0 && attr.msg_type && 3334 *attr.msg_type == WPS_M3) 3335 wps->ext_reg = 2; /* past M2/M2D phase */ 3336 } 3337 if (wps->ext_reg > 1) 3338 wps_registrar_free_pending_m2(wps->wps); 3339 if (wps->wps->wps_upnp && wps->ext_reg && 3340 wps->wps->upnp_msgs == NULL && 3341 (op_code == WSC_MSG || op_code == WSC_Done || op_code == WSC_NACK)) 3342 { 3343 struct wps_parse_attr attr; 3344 int type; 3345 if (wps_parse_msg(msg, &attr) < 0 || attr.msg_type == NULL) 3346 type = -1; 3347 else 3348 type = *attr.msg_type; 3349 wpa_printf(MSG_DEBUG, "WPS: Sending received message (type %d)" 3350 " to external Registrar for processing", type); 3351 upnp_wps_device_send_wlan_event(wps->wps->wps_upnp, 3352 wps->mac_addr_e, 3353 UPNP_WPS_WLANEVENT_TYPE_EAP, 3354 msg); 3355 if (op_code == WSC_MSG) 3356 return WPS_PENDING; 3357 } else if (wps->wps->wps_upnp && wps->ext_reg && op_code == WSC_MSG) { 3358 wpa_printf(MSG_DEBUG, "WPS: Skip internal processing - using " 3359 "external Registrar"); 3360 return WPS_CONTINUE; 3361 } 3362#endif /* CONFIG_WPS_UPNP */ 3363 3364 switch (op_code) { 3365 case WSC_MSG: 3366 return wps_process_wsc_msg(wps, msg); 3367 case WSC_ACK: 3368 if (wps_validate_wsc_ack(msg) < 0) 3369 return WPS_FAILURE; 3370 return wps_process_wsc_ack(wps, msg); 3371 case WSC_NACK: 3372 if (wps_validate_wsc_nack(msg) < 0) 3373 return WPS_FAILURE; 3374 return wps_process_wsc_nack(wps, msg); 3375 case WSC_Done: 3376 if (wps_validate_wsc_done(msg) < 0) 3377 return WPS_FAILURE; 3378 ret = wps_process_wsc_done(wps, msg); 3379 if (ret == WPS_FAILURE) { 3380 wps->state = SEND_WSC_NACK; 3381 wps_fail_event(wps->wps, WPS_WSC_DONE, 3382 wps->config_error, 3383 wps->error_indication, wps->mac_addr_e); 3384 } 3385 return ret; 3386 default: 3387 wpa_printf(MSG_DEBUG, "WPS: Unsupported op_code %d", op_code); 3388 return WPS_FAILURE; 3389 } 3390} 3391 3392 3393int wps_registrar_update_ie(struct wps_registrar *reg) 3394{ 3395 return wps_set_ie(reg); 3396} 3397 3398 3399static void wps_registrar_set_selected_timeout(void *eloop_ctx, 3400 void *timeout_ctx) 3401{ 3402 struct wps_registrar *reg = eloop_ctx; 3403 3404 wpa_printf(MSG_DEBUG, "WPS: Selected Registrar timeout - " 3405 "unselect internal Registrar"); 3406 reg->selected_registrar = 0; 3407 reg->pbc = 0; 3408 wps_registrar_selected_registrar_changed(reg, 0); 3409} 3410 3411 3412#ifdef CONFIG_WPS_UPNP 3413static void wps_registrar_sel_reg_add(struct wps_registrar *reg, 3414 struct subscription *s) 3415{ 3416 int i, j; 3417 wpa_printf(MSG_DEBUG, "WPS: External Registrar selected (dev_pw_id=%d " 3418 "config_methods=0x%x)", 3419 s->dev_password_id, s->config_methods); 3420 reg->sel_reg_union = 1; 3421 if (reg->sel_reg_dev_password_id_override != DEV_PW_PUSHBUTTON) 3422 reg->sel_reg_dev_password_id_override = s->dev_password_id; 3423 if (reg->sel_reg_config_methods_override == -1) 3424 reg->sel_reg_config_methods_override = 0; 3425 reg->sel_reg_config_methods_override |= s->config_methods; 3426 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) 3427 if (is_zero_ether_addr(reg->authorized_macs_union[i])) 3428 break; 3429 for (j = 0; i < WPS_MAX_AUTHORIZED_MACS && j < WPS_MAX_AUTHORIZED_MACS; 3430 j++) { 3431 if (is_zero_ether_addr(s->authorized_macs[j])) 3432 break; 3433 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC into union: " 3434 MACSTR, MAC2STR(s->authorized_macs[j])); 3435 os_memcpy(reg->authorized_macs_union[i], 3436 s->authorized_macs[j], ETH_ALEN); 3437 i++; 3438 } 3439 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union", 3440 (u8 *) reg->authorized_macs_union, 3441 sizeof(reg->authorized_macs_union)); 3442} 3443#endif /* CONFIG_WPS_UPNP */ 3444 3445 3446static void wps_registrar_sel_reg_union(struct wps_registrar *reg) 3447{ 3448#ifdef CONFIG_WPS_UPNP 3449 struct subscription *s; 3450 3451 if (reg->wps->wps_upnp == NULL) 3452 return; 3453 3454 dl_list_for_each(s, ®->wps->wps_upnp->subscriptions, 3455 struct subscription, list) { 3456 struct subscr_addr *sa; 3457 sa = dl_list_first(&s->addr_list, struct subscr_addr, list); 3458 if (sa) { 3459 wpa_printf(MSG_DEBUG, "WPS: External Registrar %s:%d", 3460 inet_ntoa(sa->saddr.sin_addr), 3461 ntohs(sa->saddr.sin_port)); 3462 } 3463 if (s->selected_registrar) 3464 wps_registrar_sel_reg_add(reg, s); 3465 else 3466 wpa_printf(MSG_DEBUG, "WPS: External Registrar not " 3467 "selected"); 3468 } 3469#endif /* CONFIG_WPS_UPNP */ 3470} 3471 3472 3473/** 3474 * wps_registrar_selected_registrar_changed - SetSelectedRegistrar change 3475 * @reg: Registrar data from wps_registrar_init() 3476 * 3477 * This function is called when selected registrar state changes, e.g., when an 3478 * AP receives a SetSelectedRegistrar UPnP message. 3479 */ 3480void wps_registrar_selected_registrar_changed(struct wps_registrar *reg, 3481 u16 dev_pw_id) 3482{ 3483 wpa_printf(MSG_DEBUG, "WPS: Selected registrar information changed"); 3484 3485 reg->sel_reg_union = reg->selected_registrar; 3486 reg->sel_reg_dev_password_id_override = -1; 3487 reg->sel_reg_config_methods_override = -1; 3488 os_memcpy(reg->authorized_macs_union, reg->authorized_macs, 3489 WPS_MAX_AUTHORIZED_MACS * ETH_ALEN); 3490 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union (start with own)", 3491 (u8 *) reg->authorized_macs_union, 3492 sizeof(reg->authorized_macs_union)); 3493 if (reg->selected_registrar) { 3494 u16 methods; 3495 3496 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 3497 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 3498 WPS_CONFIG_PHY_PUSHBUTTON); 3499 if (reg->pbc) { 3500 reg->sel_reg_dev_password_id_override = 3501 DEV_PW_PUSHBUTTON; 3502 wps_set_pushbutton(&methods, reg->wps->config_methods); 3503 } else if (dev_pw_id) 3504 reg->sel_reg_dev_password_id_override = dev_pw_id; 3505 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar selected " 3506 "(pbc=%d)", reg->pbc); 3507 reg->sel_reg_config_methods_override = methods; 3508 } else 3509 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar not selected"); 3510 3511 wps_registrar_sel_reg_union(reg); 3512 3513 wps_set_ie(reg); 3514 wps_cb_set_sel_reg(reg); 3515} 3516 3517 3518int wps_registrar_get_info(struct wps_registrar *reg, const u8 *addr, 3519 char *buf, size_t buflen) 3520{ 3521 struct wps_registrar_device *d; 3522 int len = 0, ret; 3523 char uuid[40]; 3524 char devtype[WPS_DEV_TYPE_BUFSIZE]; 3525 3526 d = wps_device_get(reg, addr); 3527 if (d == NULL) 3528 return 0; 3529 if (uuid_bin2str(d->uuid, uuid, sizeof(uuid))) 3530 return 0; 3531 3532 ret = os_snprintf(buf + len, buflen - len, 3533 "wpsUuid=%s\n" 3534 "wpsPrimaryDeviceType=%s\n" 3535 "wpsDeviceName=%s\n" 3536 "wpsManufacturer=%s\n" 3537 "wpsModelName=%s\n" 3538 "wpsModelNumber=%s\n" 3539 "wpsSerialNumber=%s\n", 3540 uuid, 3541 wps_dev_type_bin2str(d->dev.pri_dev_type, devtype, 3542 sizeof(devtype)), 3543 d->dev.device_name ? d->dev.device_name : "", 3544 d->dev.manufacturer ? d->dev.manufacturer : "", 3545 d->dev.model_name ? d->dev.model_name : "", 3546 d->dev.model_number ? d->dev.model_number : "", 3547 d->dev.serial_number ? d->dev.serial_number : ""); 3548 if (os_snprintf_error(buflen - len, ret)) 3549 return len; 3550 len += ret; 3551 3552 return len; 3553} 3554 3555 3556int wps_registrar_config_ap(struct wps_registrar *reg, 3557 struct wps_credential *cred) 3558{ 3559 wpa_printf(MSG_DEBUG, "WPS: encr_type=0x%x", cred->encr_type); 3560 if (!(cred->encr_type & (WPS_ENCR_NONE | WPS_ENCR_TKIP | 3561 WPS_ENCR_AES))) { 3562 if (cred->encr_type & WPS_ENCR_WEP) { 3563 wpa_printf(MSG_INFO, "WPS: Reject new AP settings " 3564 "due to WEP configuration"); 3565 return -1; 3566 } 3567 3568 wpa_printf(MSG_INFO, "WPS: Reject new AP settings due to " 3569 "invalid encr_type 0x%x", cred->encr_type); 3570 return -1; 3571 } 3572 3573 if ((cred->encr_type & (WPS_ENCR_TKIP | WPS_ENCR_AES)) == 3574 WPS_ENCR_TKIP) { 3575 wpa_printf(MSG_DEBUG, "WPS: Upgrade encr_type TKIP -> " 3576 "TKIP+AES"); 3577 cred->encr_type |= WPS_ENCR_AES; 3578 } 3579 3580 if ((cred->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) == 3581 WPS_AUTH_WPAPSK) { 3582 wpa_printf(MSG_DEBUG, "WPS: Upgrade auth_type WPAPSK -> " 3583 "WPAPSK+WPA2PSK"); 3584 cred->auth_type |= WPS_AUTH_WPA2PSK; 3585 } 3586 3587 if (reg->wps->cred_cb) 3588 return reg->wps->cred_cb(reg->wps->cb_ctx, cred); 3589 3590 return -1; 3591} 3592 3593 3594#ifdef CONFIG_WPS_NFC 3595 3596int wps_registrar_add_nfc_pw_token(struct wps_registrar *reg, 3597 const u8 *pubkey_hash, u16 pw_id, 3598 const u8 *dev_pw, size_t dev_pw_len, 3599 int pk_hash_provided_oob) 3600{ 3601 struct wps_nfc_pw_token *token; 3602 3603 if (dev_pw_len > WPS_OOB_DEVICE_PASSWORD_LEN) 3604 return -1; 3605 3606 if (pw_id == DEV_PW_NFC_CONNECTION_HANDOVER && 3607 (pubkey_hash == NULL || !pk_hash_provided_oob)) { 3608 wpa_printf(MSG_DEBUG, "WPS: Unexpected NFC Password Token " 3609 "addition - missing public key hash"); 3610 return -1; 3611 } 3612 3613 wps_free_nfc_pw_tokens(®->nfc_pw_tokens, pw_id); 3614 3615 token = os_zalloc(sizeof(*token)); 3616 if (token == NULL) 3617 return -1; 3618 3619 token->peer_pk_hash_known = pubkey_hash != NULL; 3620 if (pubkey_hash) 3621 os_memcpy(token->pubkey_hash, pubkey_hash, 3622 WPS_OOB_PUBKEY_HASH_LEN); 3623 token->pw_id = pw_id; 3624 token->pk_hash_provided_oob = pk_hash_provided_oob; 3625 if (dev_pw) { 3626 wpa_snprintf_hex_uppercase((char *) token->dev_pw, 3627 sizeof(token->dev_pw), 3628 dev_pw, dev_pw_len); 3629 token->dev_pw_len = dev_pw_len * 2; 3630 } 3631 3632 dl_list_add(®->nfc_pw_tokens, &token->list); 3633 3634 reg->selected_registrar = 1; 3635 reg->pbc = 0; 3636 wps_registrar_add_authorized_mac(reg, 3637 (u8 *) "\xff\xff\xff\xff\xff\xff"); 3638 wps_registrar_selected_registrar_changed(reg, pw_id); 3639 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 3640 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, 3641 wps_registrar_set_selected_timeout, 3642 reg, NULL); 3643 3644 wpa_printf(MSG_DEBUG, "WPS: Added NFC Device Password %u to Registrar", 3645 pw_id); 3646 3647 return 0; 3648} 3649 3650 3651int wps_registrar_add_nfc_password_token(struct wps_registrar *reg, 3652 const u8 *oob_dev_pw, 3653 size_t oob_dev_pw_len) 3654{ 3655 const u8 *pos, *hash, *dev_pw; 3656 u16 id; 3657 size_t dev_pw_len; 3658 3659 if (oob_dev_pw_len < WPS_OOB_PUBKEY_HASH_LEN + 2 || 3660 oob_dev_pw_len > WPS_OOB_PUBKEY_HASH_LEN + 2 + 3661 WPS_OOB_DEVICE_PASSWORD_LEN) 3662 return -1; 3663 3664 hash = oob_dev_pw; 3665 pos = oob_dev_pw + WPS_OOB_PUBKEY_HASH_LEN; 3666 id = WPA_GET_BE16(pos); 3667 dev_pw = pos + 2; 3668 dev_pw_len = oob_dev_pw + oob_dev_pw_len - dev_pw; 3669 3670 wpa_printf(MSG_DEBUG, "WPS: Add NFC Password Token for Password ID %u", 3671 id); 3672 3673 wpa_hexdump(MSG_DEBUG, "WPS: Public Key Hash", 3674 hash, WPS_OOB_PUBKEY_HASH_LEN); 3675 wpa_hexdump_key(MSG_DEBUG, "WPS: Device Password", dev_pw, dev_pw_len); 3676 3677 return wps_registrar_add_nfc_pw_token(reg, hash, id, dev_pw, 3678 dev_pw_len, 0); 3679} 3680 3681 3682void wps_registrar_remove_nfc_pw_token(struct wps_registrar *reg, 3683 struct wps_nfc_pw_token *token) 3684{ 3685 wps_registrar_remove_authorized_mac(reg, 3686 (u8 *) "\xff\xff\xff\xff\xff\xff"); 3687 wps_registrar_selected_registrar_changed(reg, 0); 3688 3689 /* 3690 * Free the NFC password token if it was used only for a single protocol 3691 * run. The static handover case uses the same password token multiple 3692 * times, so do not free that case here. 3693 */ 3694 if (token->peer_pk_hash_known) 3695 os_free(token); 3696} 3697 3698#endif /* CONFIG_WPS_NFC */ 3699