wps_registrar.c revision 8a4157206df48bb4855273096a6d7eac2f54b24f
1/* 2 * Wi-Fi Protected Setup - Registrar 3 * Copyright (c) 2008-2013, Jouni Malinen <j@w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9#include "utils/includes.h" 10 11#include "utils/common.h" 12#include "utils/base64.h" 13#include "utils/eloop.h" 14#include "utils/uuid.h" 15#include "utils/list.h" 16#include "crypto/crypto.h" 17#include "crypto/sha256.h" 18#include "crypto/random.h" 19#include "common/ieee802_11_defs.h" 20#include "wps_i.h" 21#include "wps_dev_attr.h" 22#include "wps_upnp.h" 23#include "wps_upnp_i.h" 24 25#ifndef CONFIG_WPS_STRICT 26#define WPS_WORKAROUNDS 27#endif /* CONFIG_WPS_STRICT */ 28 29#ifdef CONFIG_WPS_NFC 30 31struct wps_nfc_pw_token { 32 struct dl_list list; 33 u8 pubkey_hash[WPS_OOB_PUBKEY_HASH_LEN]; 34 u16 pw_id; 35 u8 dev_pw[WPS_OOB_DEVICE_PASSWORD_LEN * 2 + 1]; 36 size_t dev_pw_len; 37}; 38 39 40static void wps_remove_nfc_pw_token(struct wps_nfc_pw_token *token) 41{ 42 dl_list_del(&token->list); 43 os_free(token); 44} 45 46 47static void wps_free_nfc_pw_tokens(struct dl_list *tokens, u16 pw_id) 48{ 49 struct wps_nfc_pw_token *token, *prev; 50 dl_list_for_each_safe(token, prev, tokens, struct wps_nfc_pw_token, 51 list) { 52 if (pw_id == 0 || pw_id == token->pw_id) 53 wps_remove_nfc_pw_token(token); 54 } 55} 56 57 58static struct wps_nfc_pw_token * wps_get_nfc_pw_token(struct dl_list *tokens, 59 u16 pw_id) 60{ 61 struct wps_nfc_pw_token *token; 62 dl_list_for_each(token, tokens, struct wps_nfc_pw_token, list) { 63 if (pw_id == token->pw_id) 64 return token; 65 } 66 return NULL; 67} 68 69#else /* CONFIG_WPS_NFC */ 70 71#define wps_free_nfc_pw_tokens(t, p) do { } while (0) 72 73#endif /* CONFIG_WPS_NFC */ 74 75 76struct wps_uuid_pin { 77 struct dl_list list; 78 u8 uuid[WPS_UUID_LEN]; 79 int wildcard_uuid; 80 u8 *pin; 81 size_t pin_len; 82#define PIN_LOCKED BIT(0) 83#define PIN_EXPIRES BIT(1) 84 int flags; 85 struct os_time expiration; 86 u8 enrollee_addr[ETH_ALEN]; 87}; 88 89 90static void wps_free_pin(struct wps_uuid_pin *pin) 91{ 92 os_free(pin->pin); 93 os_free(pin); 94} 95 96 97static void wps_remove_pin(struct wps_uuid_pin *pin) 98{ 99 dl_list_del(&pin->list); 100 wps_free_pin(pin); 101} 102 103 104static void wps_free_pins(struct dl_list *pins) 105{ 106 struct wps_uuid_pin *pin, *prev; 107 dl_list_for_each_safe(pin, prev, pins, struct wps_uuid_pin, list) 108 wps_remove_pin(pin); 109} 110 111 112struct wps_pbc_session { 113 struct wps_pbc_session *next; 114 u8 addr[ETH_ALEN]; 115 u8 uuid_e[WPS_UUID_LEN]; 116 struct os_time timestamp; 117}; 118 119 120static void wps_free_pbc_sessions(struct wps_pbc_session *pbc) 121{ 122 struct wps_pbc_session *prev; 123 124 while (pbc) { 125 prev = pbc; 126 pbc = pbc->next; 127 os_free(prev); 128 } 129} 130 131 132struct wps_registrar_device { 133 struct wps_registrar_device *next; 134 struct wps_device_data dev; 135 u8 uuid[WPS_UUID_LEN]; 136}; 137 138 139struct wps_registrar { 140 struct wps_context *wps; 141 142 int pbc; 143 int selected_registrar; 144 145 int (*new_psk_cb)(void *ctx, const u8 *mac_addr, const u8 *p2p_dev_addr, 146 const u8 *psk, size_t psk_len); 147 int (*set_ie_cb)(void *ctx, struct wpabuf *beacon_ie, 148 struct wpabuf *probe_resp_ie); 149 void (*pin_needed_cb)(void *ctx, const u8 *uuid_e, 150 const struct wps_device_data *dev); 151 void (*reg_success_cb)(void *ctx, const u8 *mac_addr, 152 const u8 *uuid_e, const u8 *dev_pw, 153 size_t dev_pw_len); 154 void (*set_sel_reg_cb)(void *ctx, int sel_reg, u16 dev_passwd_id, 155 u16 sel_reg_config_methods); 156 void (*enrollee_seen_cb)(void *ctx, const u8 *addr, const u8 *uuid_e, 157 const u8 *pri_dev_type, u16 config_methods, 158 u16 dev_password_id, u8 request_type, 159 const char *dev_name); 160 void *cb_ctx; 161 162 struct dl_list pins; 163 struct dl_list nfc_pw_tokens; 164 struct wps_pbc_session *pbc_sessions; 165 166 int skip_cred_build; 167 struct wpabuf *extra_cred; 168 int disable_auto_conf; 169 int sel_reg_union; 170 int sel_reg_dev_password_id_override; 171 int sel_reg_config_methods_override; 172 int static_wep_only; 173 int dualband; 174 int force_per_enrollee_psk; 175 176 struct wps_registrar_device *devices; 177 178 int force_pbc_overlap; 179 180 u8 authorized_macs[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN]; 181 u8 authorized_macs_union[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN]; 182 183 u8 p2p_dev_addr[ETH_ALEN]; 184 185 u8 pbc_ignore_uuid[WPS_UUID_LEN]; 186 struct os_time pbc_ignore_start; 187}; 188 189 190static int wps_set_ie(struct wps_registrar *reg); 191static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx); 192static void wps_registrar_set_selected_timeout(void *eloop_ctx, 193 void *timeout_ctx); 194static void wps_registrar_remove_pin(struct wps_registrar *reg, 195 struct wps_uuid_pin *pin); 196 197 198static void wps_registrar_add_authorized_mac(struct wps_registrar *reg, 199 const u8 *addr) 200{ 201 int i; 202 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC " MACSTR, 203 MAC2STR(addr)); 204 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) 205 if (os_memcmp(reg->authorized_macs[i], addr, ETH_ALEN) == 0) { 206 wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was " 207 "already in the list"); 208 return; /* already in list */ 209 } 210 for (i = WPS_MAX_AUTHORIZED_MACS - 1; i > 0; i--) 211 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i - 1], 212 ETH_ALEN); 213 os_memcpy(reg->authorized_macs[0], addr, ETH_ALEN); 214 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs", 215 (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs)); 216} 217 218 219static void wps_registrar_remove_authorized_mac(struct wps_registrar *reg, 220 const u8 *addr) 221{ 222 int i; 223 wpa_printf(MSG_DEBUG, "WPS: Remove authorized MAC " MACSTR, 224 MAC2STR(addr)); 225 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) { 226 if (os_memcmp(reg->authorized_macs, addr, ETH_ALEN) == 0) 227 break; 228 } 229 if (i == WPS_MAX_AUTHORIZED_MACS) { 230 wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was not in the " 231 "list"); 232 return; /* not in the list */ 233 } 234 for (; i + 1 < WPS_MAX_AUTHORIZED_MACS; i++) 235 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i + 1], 236 ETH_ALEN); 237 os_memset(reg->authorized_macs[WPS_MAX_AUTHORIZED_MACS - 1], 0, 238 ETH_ALEN); 239 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs", 240 (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs)); 241} 242 243 244static void wps_free_devices(struct wps_registrar_device *dev) 245{ 246 struct wps_registrar_device *prev; 247 248 while (dev) { 249 prev = dev; 250 dev = dev->next; 251 wps_device_data_free(&prev->dev); 252 os_free(prev); 253 } 254} 255 256 257static struct wps_registrar_device * wps_device_get(struct wps_registrar *reg, 258 const u8 *addr) 259{ 260 struct wps_registrar_device *dev; 261 262 for (dev = reg->devices; dev; dev = dev->next) { 263 if (os_memcmp(dev->dev.mac_addr, addr, ETH_ALEN) == 0) 264 return dev; 265 } 266 return NULL; 267} 268 269 270static void wps_device_clone_data(struct wps_device_data *dst, 271 struct wps_device_data *src) 272{ 273 os_memcpy(dst->mac_addr, src->mac_addr, ETH_ALEN); 274 os_memcpy(dst->pri_dev_type, src->pri_dev_type, WPS_DEV_TYPE_LEN); 275 276#define WPS_STRDUP(n) \ 277 os_free(dst->n); \ 278 dst->n = src->n ? os_strdup(src->n) : NULL 279 280 WPS_STRDUP(device_name); 281 WPS_STRDUP(manufacturer); 282 WPS_STRDUP(model_name); 283 WPS_STRDUP(model_number); 284 WPS_STRDUP(serial_number); 285#undef WPS_STRDUP 286} 287 288 289int wps_device_store(struct wps_registrar *reg, 290 struct wps_device_data *dev, const u8 *uuid) 291{ 292 struct wps_registrar_device *d; 293 294 d = wps_device_get(reg, dev->mac_addr); 295 if (d == NULL) { 296 d = os_zalloc(sizeof(*d)); 297 if (d == NULL) 298 return -1; 299 d->next = reg->devices; 300 reg->devices = d; 301 } 302 303 wps_device_clone_data(&d->dev, dev); 304 os_memcpy(d->uuid, uuid, WPS_UUID_LEN); 305 306 return 0; 307} 308 309 310static void wps_registrar_add_pbc_session(struct wps_registrar *reg, 311 const u8 *addr, const u8 *uuid_e) 312{ 313 struct wps_pbc_session *pbc, *prev = NULL; 314 struct os_time now; 315 316 os_get_time(&now); 317 318 pbc = reg->pbc_sessions; 319 while (pbc) { 320 if (os_memcmp(pbc->addr, addr, ETH_ALEN) == 0 && 321 os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0) { 322 if (prev) 323 prev->next = pbc->next; 324 else 325 reg->pbc_sessions = pbc->next; 326 break; 327 } 328 prev = pbc; 329 pbc = pbc->next; 330 } 331 332 if (!pbc) { 333 pbc = os_zalloc(sizeof(*pbc)); 334 if (pbc == NULL) 335 return; 336 os_memcpy(pbc->addr, addr, ETH_ALEN); 337 if (uuid_e) 338 os_memcpy(pbc->uuid_e, uuid_e, WPS_UUID_LEN); 339 } 340 341 pbc->next = reg->pbc_sessions; 342 reg->pbc_sessions = pbc; 343 pbc->timestamp = now; 344 345 /* remove entries that have timed out */ 346 prev = pbc; 347 pbc = pbc->next; 348 349 while (pbc) { 350 if (now.sec > pbc->timestamp.sec + WPS_PBC_WALK_TIME) { 351 prev->next = NULL; 352 wps_free_pbc_sessions(pbc); 353 break; 354 } 355 prev = pbc; 356 pbc = pbc->next; 357 } 358} 359 360 361static void wps_registrar_remove_pbc_session(struct wps_registrar *reg, 362 const u8 *uuid_e, 363 const u8 *p2p_dev_addr) 364{ 365 struct wps_pbc_session *pbc, *prev = NULL, *tmp; 366 367 pbc = reg->pbc_sessions; 368 while (pbc) { 369 if (os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0 || 370 (p2p_dev_addr && !is_zero_ether_addr(reg->p2p_dev_addr) && 371 os_memcmp(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN) == 372 0)) { 373 if (prev) 374 prev->next = pbc->next; 375 else 376 reg->pbc_sessions = pbc->next; 377 tmp = pbc; 378 pbc = pbc->next; 379 wpa_printf(MSG_DEBUG, "WPS: Removing PBC session for " 380 "addr=" MACSTR, MAC2STR(tmp->addr)); 381 wpa_hexdump(MSG_DEBUG, "WPS: Removed UUID-E", 382 tmp->uuid_e, WPS_UUID_LEN); 383 os_free(tmp); 384 continue; 385 } 386 prev = pbc; 387 pbc = pbc->next; 388 } 389} 390 391 392int wps_registrar_pbc_overlap(struct wps_registrar *reg, 393 const u8 *addr, const u8 *uuid_e) 394{ 395 int count = 0; 396 struct wps_pbc_session *pbc; 397 struct wps_pbc_session *first = NULL; 398 struct os_time now; 399 400 os_get_time(&now); 401 402 wpa_printf(MSG_DEBUG, "WPS: Checking active PBC sessions for overlap"); 403 404 if (uuid_e) { 405 wpa_printf(MSG_DEBUG, "WPS: Add one for the requested UUID"); 406 wpa_hexdump(MSG_DEBUG, "WPS: Requested UUID", 407 uuid_e, WPS_UUID_LEN); 408 count++; 409 } 410 411 for (pbc = reg->pbc_sessions; pbc; pbc = pbc->next) { 412 wpa_printf(MSG_DEBUG, "WPS: Consider PBC session with " MACSTR, 413 MAC2STR(pbc->addr)); 414 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", 415 pbc->uuid_e, WPS_UUID_LEN); 416 if (now.sec > pbc->timestamp.sec + WPS_PBC_WALK_TIME) { 417 wpa_printf(MSG_DEBUG, "WPS: PBC walk time has " 418 "expired"); 419 break; 420 } 421 if (first && 422 os_memcmp(pbc->uuid_e, first->uuid_e, WPS_UUID_LEN) == 0) { 423 wpa_printf(MSG_DEBUG, "WPS: Same Enrollee"); 424 continue; /* same Enrollee */ 425 } 426 if (uuid_e == NULL || 427 os_memcmp(uuid_e, pbc->uuid_e, WPS_UUID_LEN)) { 428 wpa_printf(MSG_DEBUG, "WPS: New Enrollee"); 429 count++; 430 } 431 if (first == NULL) 432 first = pbc; 433 } 434 435 wpa_printf(MSG_DEBUG, "WPS: %u active PBC session(s) found", count); 436 437 return count > 1 ? 1 : 0; 438} 439 440 441static int wps_build_wps_state(struct wps_context *wps, struct wpabuf *msg) 442{ 443 wpa_printf(MSG_DEBUG, "WPS: * Wi-Fi Protected Setup State (%d)", 444 wps->wps_state); 445 wpabuf_put_be16(msg, ATTR_WPS_STATE); 446 wpabuf_put_be16(msg, 1); 447 wpabuf_put_u8(msg, wps->wps_state); 448 return 0; 449} 450 451 452#ifdef CONFIG_WPS_UPNP 453static void wps_registrar_free_pending_m2(struct wps_context *wps) 454{ 455 struct upnp_pending_message *p, *p2, *prev = NULL; 456 p = wps->upnp_msgs; 457 while (p) { 458 if (p->type == WPS_M2 || p->type == WPS_M2D) { 459 if (prev == NULL) 460 wps->upnp_msgs = p->next; 461 else 462 prev->next = p->next; 463 wpa_printf(MSG_DEBUG, "WPS UPnP: Drop pending M2/M2D"); 464 p2 = p; 465 p = p->next; 466 wpabuf_free(p2->msg); 467 os_free(p2); 468 continue; 469 } 470 prev = p; 471 p = p->next; 472 } 473} 474#endif /* CONFIG_WPS_UPNP */ 475 476 477static int wps_build_ap_setup_locked(struct wps_context *wps, 478 struct wpabuf *msg) 479{ 480 if (wps->ap_setup_locked && wps->ap_setup_locked != 2) { 481 wpa_printf(MSG_DEBUG, "WPS: * AP Setup Locked"); 482 wpabuf_put_be16(msg, ATTR_AP_SETUP_LOCKED); 483 wpabuf_put_be16(msg, 1); 484 wpabuf_put_u8(msg, 1); 485 } 486 return 0; 487} 488 489 490static int wps_build_selected_registrar(struct wps_registrar *reg, 491 struct wpabuf *msg) 492{ 493 if (!reg->sel_reg_union) 494 return 0; 495 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar"); 496 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR); 497 wpabuf_put_be16(msg, 1); 498 wpabuf_put_u8(msg, 1); 499 return 0; 500} 501 502 503static int wps_build_sel_reg_dev_password_id(struct wps_registrar *reg, 504 struct wpabuf *msg) 505{ 506 u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT; 507 if (!reg->sel_reg_union) 508 return 0; 509 if (reg->sel_reg_dev_password_id_override >= 0) 510 id = reg->sel_reg_dev_password_id_override; 511 wpa_printf(MSG_DEBUG, "WPS: * Device Password ID (%d)", id); 512 wpabuf_put_be16(msg, ATTR_DEV_PASSWORD_ID); 513 wpabuf_put_be16(msg, 2); 514 wpabuf_put_be16(msg, id); 515 return 0; 516} 517 518 519static int wps_build_sel_pbc_reg_uuid_e(struct wps_registrar *reg, 520 struct wpabuf *msg) 521{ 522 u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT; 523 if (!reg->sel_reg_union) 524 return 0; 525 if (reg->sel_reg_dev_password_id_override >= 0) 526 id = reg->sel_reg_dev_password_id_override; 527 if (id != DEV_PW_PUSHBUTTON || !reg->dualband) 528 return 0; 529 return wps_build_uuid_e(msg, reg->wps->uuid); 530} 531 532 533static void wps_set_pushbutton(u16 *methods, u16 conf_methods) 534{ 535 *methods |= WPS_CONFIG_PUSHBUTTON; 536#ifdef CONFIG_WPS2 537 if ((conf_methods & WPS_CONFIG_VIRT_PUSHBUTTON) == 538 WPS_CONFIG_VIRT_PUSHBUTTON) 539 *methods |= WPS_CONFIG_VIRT_PUSHBUTTON; 540 if ((conf_methods & WPS_CONFIG_PHY_PUSHBUTTON) == 541 WPS_CONFIG_PHY_PUSHBUTTON) 542 *methods |= WPS_CONFIG_PHY_PUSHBUTTON; 543 if ((*methods & WPS_CONFIG_VIRT_PUSHBUTTON) != 544 WPS_CONFIG_VIRT_PUSHBUTTON && 545 (*methods & WPS_CONFIG_PHY_PUSHBUTTON) != 546 WPS_CONFIG_PHY_PUSHBUTTON) { 547 /* 548 * Required to include virtual/physical flag, but we were not 549 * configured with push button type, so have to default to one 550 * of them. 551 */ 552 *methods |= WPS_CONFIG_PHY_PUSHBUTTON; 553 } 554#endif /* CONFIG_WPS2 */ 555} 556 557 558static int wps_build_sel_reg_config_methods(struct wps_registrar *reg, 559 struct wpabuf *msg) 560{ 561 u16 methods; 562 if (!reg->sel_reg_union) 563 return 0; 564 methods = reg->wps->config_methods; 565 methods &= ~WPS_CONFIG_PUSHBUTTON; 566#ifdef CONFIG_WPS2 567 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 568 WPS_CONFIG_PHY_PUSHBUTTON); 569#endif /* CONFIG_WPS2 */ 570 if (reg->pbc) 571 wps_set_pushbutton(&methods, reg->wps->config_methods); 572 if (reg->sel_reg_config_methods_override >= 0) 573 methods = reg->sel_reg_config_methods_override; 574 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar Config Methods (%x)", 575 methods); 576 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR_CONFIG_METHODS); 577 wpabuf_put_be16(msg, 2); 578 wpabuf_put_be16(msg, methods); 579 return 0; 580} 581 582 583static int wps_build_probe_config_methods(struct wps_registrar *reg, 584 struct wpabuf *msg) 585{ 586 u16 methods; 587 /* 588 * These are the methods that the AP supports as an Enrollee for adding 589 * external Registrars. 590 */ 591 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 592#ifdef CONFIG_WPS2 593 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 594 WPS_CONFIG_PHY_PUSHBUTTON); 595#endif /* CONFIG_WPS2 */ 596 wpa_printf(MSG_DEBUG, "WPS: * Config Methods (%x)", methods); 597 wpabuf_put_be16(msg, ATTR_CONFIG_METHODS); 598 wpabuf_put_be16(msg, 2); 599 wpabuf_put_be16(msg, methods); 600 return 0; 601} 602 603 604static int wps_build_config_methods_r(struct wps_registrar *reg, 605 struct wpabuf *msg) 606{ 607 return wps_build_config_methods(msg, reg->wps->config_methods); 608} 609 610 611const u8 * wps_authorized_macs(struct wps_registrar *reg, size_t *count) 612{ 613 *count = 0; 614 615#ifdef CONFIG_WPS2 616 while (*count < WPS_MAX_AUTHORIZED_MACS) { 617 if (is_zero_ether_addr(reg->authorized_macs_union[*count])) 618 break; 619 (*count)++; 620 } 621#endif /* CONFIG_WPS2 */ 622 623 return (const u8 *) reg->authorized_macs_union; 624} 625 626 627/** 628 * wps_registrar_init - Initialize WPS Registrar data 629 * @wps: Pointer to longterm WPS context 630 * @cfg: Registrar configuration 631 * Returns: Pointer to allocated Registrar data or %NULL on failure 632 * 633 * This function is used to initialize WPS Registrar functionality. It can be 634 * used for a single Registrar run (e.g., when run in a supplicant) or multiple 635 * runs (e.g., when run as an internal Registrar in an AP). Caller is 636 * responsible for freeing the returned data with wps_registrar_deinit() when 637 * Registrar functionality is not needed anymore. 638 */ 639struct wps_registrar * 640wps_registrar_init(struct wps_context *wps, 641 const struct wps_registrar_config *cfg) 642{ 643 struct wps_registrar *reg = os_zalloc(sizeof(*reg)); 644 if (reg == NULL) 645 return NULL; 646 647 dl_list_init(®->pins); 648 dl_list_init(®->nfc_pw_tokens); 649 reg->wps = wps; 650 reg->new_psk_cb = cfg->new_psk_cb; 651 reg->set_ie_cb = cfg->set_ie_cb; 652 reg->pin_needed_cb = cfg->pin_needed_cb; 653 reg->reg_success_cb = cfg->reg_success_cb; 654 reg->set_sel_reg_cb = cfg->set_sel_reg_cb; 655 reg->enrollee_seen_cb = cfg->enrollee_seen_cb; 656 reg->cb_ctx = cfg->cb_ctx; 657 reg->skip_cred_build = cfg->skip_cred_build; 658 if (cfg->extra_cred) { 659 reg->extra_cred = wpabuf_alloc_copy(cfg->extra_cred, 660 cfg->extra_cred_len); 661 if (reg->extra_cred == NULL) { 662 os_free(reg); 663 return NULL; 664 } 665 } 666 reg->disable_auto_conf = cfg->disable_auto_conf; 667 reg->sel_reg_dev_password_id_override = -1; 668 reg->sel_reg_config_methods_override = -1; 669 reg->static_wep_only = cfg->static_wep_only; 670 reg->dualband = cfg->dualband; 671 reg->force_per_enrollee_psk = cfg->force_per_enrollee_psk; 672 673 if (wps_set_ie(reg)) { 674 wps_registrar_deinit(reg); 675 return NULL; 676 } 677 678 return reg; 679} 680 681 682/** 683 * wps_registrar_deinit - Deinitialize WPS Registrar data 684 * @reg: Registrar data from wps_registrar_init() 685 */ 686void wps_registrar_deinit(struct wps_registrar *reg) 687{ 688 if (reg == NULL) 689 return; 690 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 691 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 692 wps_free_pins(®->pins); 693 wps_free_nfc_pw_tokens(®->nfc_pw_tokens, 0); 694 wps_free_pbc_sessions(reg->pbc_sessions); 695 wpabuf_free(reg->extra_cred); 696 wps_free_devices(reg->devices); 697 os_free(reg); 698} 699 700 701static void wps_registrar_invalidate_unused(struct wps_registrar *reg) 702{ 703 struct wps_uuid_pin *pin; 704 705 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 706 if (pin->wildcard_uuid == 1 && !(pin->flags & PIN_LOCKED)) { 707 wpa_printf(MSG_DEBUG, "WPS: Invalidate previously " 708 "configured wildcard PIN"); 709 wps_registrar_remove_pin(reg, pin); 710 break; 711 } 712 } 713} 714 715 716/** 717 * wps_registrar_add_pin - Configure a new PIN for Registrar 718 * @reg: Registrar data from wps_registrar_init() 719 * @addr: Enrollee MAC address or %NULL if not known 720 * @uuid: UUID-E or %NULL for wildcard (any UUID) 721 * @pin: PIN (Device Password) 722 * @pin_len: Length of pin in octets 723 * @timeout: Time (in seconds) when the PIN will be invalidated; 0 = no timeout 724 * Returns: 0 on success, -1 on failure 725 */ 726int wps_registrar_add_pin(struct wps_registrar *reg, const u8 *addr, 727 const u8 *uuid, const u8 *pin, size_t pin_len, 728 int timeout) 729{ 730 struct wps_uuid_pin *p; 731 732 p = os_zalloc(sizeof(*p)); 733 if (p == NULL) 734 return -1; 735 if (addr) 736 os_memcpy(p->enrollee_addr, addr, ETH_ALEN); 737 if (uuid == NULL) 738 p->wildcard_uuid = 1; 739 else 740 os_memcpy(p->uuid, uuid, WPS_UUID_LEN); 741 p->pin = os_malloc(pin_len); 742 if (p->pin == NULL) { 743 os_free(p); 744 return -1; 745 } 746 os_memcpy(p->pin, pin, pin_len); 747 p->pin_len = pin_len; 748 749 if (timeout) { 750 p->flags |= PIN_EXPIRES; 751 os_get_time(&p->expiration); 752 p->expiration.sec += timeout; 753 } 754 755 if (p->wildcard_uuid) 756 wps_registrar_invalidate_unused(reg); 757 758 dl_list_add(®->pins, &p->list); 759 760 wpa_printf(MSG_DEBUG, "WPS: A new PIN configured (timeout=%d)", 761 timeout); 762 wpa_hexdump(MSG_DEBUG, "WPS: UUID", uuid, WPS_UUID_LEN); 763 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: PIN", pin, pin_len); 764 reg->selected_registrar = 1; 765 reg->pbc = 0; 766 if (addr) 767 wps_registrar_add_authorized_mac(reg, addr); 768 else 769 wps_registrar_add_authorized_mac( 770 reg, (u8 *) "\xff\xff\xff\xff\xff\xff"); 771 wps_registrar_selected_registrar_changed(reg, 0); 772 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 773 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, 774 wps_registrar_set_selected_timeout, 775 reg, NULL); 776 777 return 0; 778} 779 780 781static void wps_registrar_remove_pin(struct wps_registrar *reg, 782 struct wps_uuid_pin *pin) 783{ 784 u8 *addr; 785 u8 bcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 786 787 if (is_zero_ether_addr(pin->enrollee_addr)) 788 addr = bcast; 789 else 790 addr = pin->enrollee_addr; 791 wps_registrar_remove_authorized_mac(reg, addr); 792 wps_remove_pin(pin); 793 wps_registrar_selected_registrar_changed(reg, 0); 794} 795 796 797static void wps_registrar_expire_pins(struct wps_registrar *reg) 798{ 799 struct wps_uuid_pin *pin, *prev; 800 struct os_time now; 801 802 os_get_time(&now); 803 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 804 { 805 if ((pin->flags & PIN_EXPIRES) && 806 os_time_before(&pin->expiration, &now)) { 807 wpa_hexdump(MSG_DEBUG, "WPS: Expired PIN for UUID", 808 pin->uuid, WPS_UUID_LEN); 809 wps_registrar_remove_pin(reg, pin); 810 } 811 } 812} 813 814 815/** 816 * wps_registrar_invalidate_wildcard_pin - Invalidate a wildcard PIN 817 * @reg: Registrar data from wps_registrar_init() 818 * @dev_pw: PIN to search for or %NULL to match any 819 * @dev_pw_len: Length of dev_pw in octets 820 * Returns: 0 on success, -1 if not wildcard PIN is enabled 821 */ 822static int wps_registrar_invalidate_wildcard_pin(struct wps_registrar *reg, 823 const u8 *dev_pw, 824 size_t dev_pw_len) 825{ 826 struct wps_uuid_pin *pin, *prev; 827 828 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 829 { 830 if (dev_pw && pin->pin && 831 (dev_pw_len != pin->pin_len || 832 os_memcmp(dev_pw, pin->pin, dev_pw_len) != 0)) 833 continue; /* different PIN */ 834 if (pin->wildcard_uuid) { 835 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID", 836 pin->uuid, WPS_UUID_LEN); 837 wps_registrar_remove_pin(reg, pin); 838 return 0; 839 } 840 } 841 842 return -1; 843} 844 845 846/** 847 * wps_registrar_invalidate_pin - Invalidate a PIN for a specific UUID-E 848 * @reg: Registrar data from wps_registrar_init() 849 * @uuid: UUID-E 850 * Returns: 0 on success, -1 on failure (e.g., PIN not found) 851 */ 852int wps_registrar_invalidate_pin(struct wps_registrar *reg, const u8 *uuid) 853{ 854 struct wps_uuid_pin *pin, *prev; 855 856 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 857 { 858 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 859 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID", 860 pin->uuid, WPS_UUID_LEN); 861 wps_registrar_remove_pin(reg, pin); 862 return 0; 863 } 864 } 865 866 return -1; 867} 868 869 870static const u8 * wps_registrar_get_pin(struct wps_registrar *reg, 871 const u8 *uuid, size_t *pin_len) 872{ 873 struct wps_uuid_pin *pin, *found = NULL; 874 875 wps_registrar_expire_pins(reg); 876 877 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 878 if (!pin->wildcard_uuid && 879 os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 880 found = pin; 881 break; 882 } 883 } 884 885 if (!found) { 886 /* Check for wildcard UUIDs since none of the UUID-specific 887 * PINs matched */ 888 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 889 if (pin->wildcard_uuid == 1 || 890 pin->wildcard_uuid == 2) { 891 wpa_printf(MSG_DEBUG, "WPS: Found a wildcard " 892 "PIN. Assigned it for this UUID-E"); 893 pin->wildcard_uuid++; 894 os_memcpy(pin->uuid, uuid, WPS_UUID_LEN); 895 found = pin; 896 break; 897 } 898 } 899 } 900 901 if (!found) 902 return NULL; 903 904 /* 905 * Lock the PIN to avoid attacks based on concurrent re-use of the PIN 906 * that could otherwise avoid PIN invalidations. 907 */ 908 if (found->flags & PIN_LOCKED) { 909 wpa_printf(MSG_DEBUG, "WPS: Selected PIN locked - do not " 910 "allow concurrent re-use"); 911 return NULL; 912 } 913 *pin_len = found->pin_len; 914 found->flags |= PIN_LOCKED; 915 return found->pin; 916} 917 918 919/** 920 * wps_registrar_unlock_pin - Unlock a PIN for a specific UUID-E 921 * @reg: Registrar data from wps_registrar_init() 922 * @uuid: UUID-E 923 * Returns: 0 on success, -1 on failure 924 * 925 * PINs are locked to enforce only one concurrent use. This function unlocks a 926 * PIN to allow it to be used again. If the specified PIN was configured using 927 * a wildcard UUID, it will be removed instead of allowing multiple uses. 928 */ 929int wps_registrar_unlock_pin(struct wps_registrar *reg, const u8 *uuid) 930{ 931 struct wps_uuid_pin *pin; 932 933 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 934 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 935 if (pin->wildcard_uuid == 3) { 936 wpa_printf(MSG_DEBUG, "WPS: Invalidating used " 937 "wildcard PIN"); 938 return wps_registrar_invalidate_pin(reg, uuid); 939 } 940 pin->flags &= ~PIN_LOCKED; 941 return 0; 942 } 943 } 944 945 return -1; 946} 947 948 949static void wps_registrar_stop_pbc(struct wps_registrar *reg) 950{ 951 reg->selected_registrar = 0; 952 reg->pbc = 0; 953 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN); 954 wps_registrar_remove_authorized_mac(reg, 955 (u8 *) "\xff\xff\xff\xff\xff\xff"); 956 wps_registrar_selected_registrar_changed(reg, 0); 957} 958 959 960static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx) 961{ 962 struct wps_registrar *reg = eloop_ctx; 963 964 wpa_printf(MSG_DEBUG, "WPS: PBC timed out - disable PBC mode"); 965 wps_pbc_timeout_event(reg->wps); 966 wps_registrar_stop_pbc(reg); 967} 968 969 970/** 971 * wps_registrar_button_pushed - Notify Registrar that AP button was pushed 972 * @reg: Registrar data from wps_registrar_init() 973 * @p2p_dev_addr: Limit allowed PBC devices to the specified P2P device, %NULL 974 * indicates no such filtering 975 * Returns: 0 on success, -1 on failure, -2 on session overlap 976 * 977 * This function is called on an AP when a push button is pushed to activate 978 * PBC mode. The PBC mode will be stopped after walk time (2 minutes) timeout 979 * or when a PBC registration is completed. If more than one Enrollee in active 980 * PBC mode has been detected during the monitor time (previous 2 minutes), the 981 * PBC mode is not activated and -2 is returned to indicate session overlap. 982 * This is skipped if a specific Enrollee is selected. 983 */ 984int wps_registrar_button_pushed(struct wps_registrar *reg, 985 const u8 *p2p_dev_addr) 986{ 987 if (p2p_dev_addr == NULL && 988 wps_registrar_pbc_overlap(reg, NULL, NULL)) { 989 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - do not start PBC " 990 "mode"); 991 wps_pbc_overlap_event(reg->wps); 992 return -2; 993 } 994 wpa_printf(MSG_DEBUG, "WPS: Button pushed - PBC mode started"); 995 reg->force_pbc_overlap = 0; 996 reg->selected_registrar = 1; 997 reg->pbc = 1; 998 if (p2p_dev_addr) 999 os_memcpy(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN); 1000 else 1001 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN); 1002 wps_registrar_add_authorized_mac(reg, 1003 (u8 *) "\xff\xff\xff\xff\xff\xff"); 1004 wps_registrar_selected_registrar_changed(reg, 0); 1005 1006 wps_pbc_active_event(reg->wps); 1007 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 1008 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 1009 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wps_registrar_pbc_timeout, 1010 reg, NULL); 1011 return 0; 1012} 1013 1014 1015static void wps_registrar_pbc_completed(struct wps_registrar *reg) 1016{ 1017 wpa_printf(MSG_DEBUG, "WPS: PBC completed - stopping PBC mode"); 1018 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 1019 wps_registrar_stop_pbc(reg); 1020 wps_pbc_disable_event(reg->wps); 1021} 1022 1023 1024static void wps_registrar_pin_completed(struct wps_registrar *reg) 1025{ 1026 wpa_printf(MSG_DEBUG, "WPS: PIN completed using internal Registrar"); 1027 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 1028 reg->selected_registrar = 0; 1029 wps_registrar_selected_registrar_changed(reg, 0); 1030} 1031 1032 1033void wps_registrar_complete(struct wps_registrar *registrar, const u8 *uuid_e, 1034 const u8 *dev_pw, size_t dev_pw_len) 1035{ 1036 if (registrar->pbc) { 1037 wps_registrar_remove_pbc_session(registrar, 1038 uuid_e, NULL); 1039 wps_registrar_pbc_completed(registrar); 1040 os_get_time(®istrar->pbc_ignore_start); 1041 os_memcpy(registrar->pbc_ignore_uuid, uuid_e, WPS_UUID_LEN); 1042 } else { 1043 wps_registrar_pin_completed(registrar); 1044 } 1045 1046 if (dev_pw && 1047 wps_registrar_invalidate_wildcard_pin(registrar, dev_pw, 1048 dev_pw_len) == 0) { 1049 wpa_hexdump_key(MSG_DEBUG, "WPS: Invalidated wildcard PIN", 1050 dev_pw, dev_pw_len); 1051 } 1052} 1053 1054 1055int wps_registrar_wps_cancel(struct wps_registrar *reg) 1056{ 1057 if (reg->pbc) { 1058 wpa_printf(MSG_DEBUG, "WPS: PBC is set - cancelling it"); 1059 wps_registrar_pbc_timeout(reg, NULL); 1060 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 1061 return 1; 1062 } else if (reg->selected_registrar) { 1063 /* PIN Method */ 1064 wpa_printf(MSG_DEBUG, "WPS: PIN is set - cancelling it"); 1065 wps_registrar_pin_completed(reg); 1066 wps_registrar_invalidate_wildcard_pin(reg, NULL, 0); 1067 return 1; 1068 } 1069 return 0; 1070} 1071 1072 1073/** 1074 * wps_registrar_probe_req_rx - Notify Registrar of Probe Request 1075 * @reg: Registrar data from wps_registrar_init() 1076 * @addr: MAC address of the Probe Request sender 1077 * @wps_data: WPS IE contents 1078 * 1079 * This function is called on an AP when a Probe Request with WPS IE is 1080 * received. This is used to track PBC mode use and to detect possible overlap 1081 * situation with other WPS APs. 1082 */ 1083void wps_registrar_probe_req_rx(struct wps_registrar *reg, const u8 *addr, 1084 const struct wpabuf *wps_data, 1085 int p2p_wildcard) 1086{ 1087 struct wps_parse_attr attr; 1088 int skip_add = 0; 1089 1090 wpa_hexdump_buf(MSG_MSGDUMP, 1091 "WPS: Probe Request with WPS data received", 1092 wps_data); 1093 1094 if (wps_parse_msg(wps_data, &attr) < 0) 1095 return; 1096 1097 if (attr.config_methods == NULL) { 1098 wpa_printf(MSG_DEBUG, "WPS: No Config Methods attribute in " 1099 "Probe Request"); 1100 return; 1101 } 1102 1103 if (attr.dev_password_id == NULL) { 1104 wpa_printf(MSG_DEBUG, "WPS: No Device Password Id attribute " 1105 "in Probe Request"); 1106 return; 1107 } 1108 1109 if (reg->enrollee_seen_cb && attr.uuid_e && 1110 attr.primary_dev_type && attr.request_type && !p2p_wildcard) { 1111 char *dev_name = NULL; 1112 if (attr.dev_name) { 1113 dev_name = os_zalloc(attr.dev_name_len + 1); 1114 if (dev_name) { 1115 os_memcpy(dev_name, attr.dev_name, 1116 attr.dev_name_len); 1117 } 1118 } 1119 reg->enrollee_seen_cb(reg->cb_ctx, addr, attr.uuid_e, 1120 attr.primary_dev_type, 1121 WPA_GET_BE16(attr.config_methods), 1122 WPA_GET_BE16(attr.dev_password_id), 1123 *attr.request_type, dev_name); 1124 os_free(dev_name); 1125 } 1126 1127 if (WPA_GET_BE16(attr.dev_password_id) != DEV_PW_PUSHBUTTON) 1128 return; /* Not PBC */ 1129 1130 wpa_printf(MSG_DEBUG, "WPS: Probe Request for PBC received from " 1131 MACSTR, MAC2STR(addr)); 1132 if (attr.uuid_e == NULL) { 1133 wpa_printf(MSG_DEBUG, "WPS: Invalid Probe Request WPS IE: No " 1134 "UUID-E included"); 1135 return; 1136 } 1137 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E from Probe Request", attr.uuid_e, 1138 WPS_UUID_LEN); 1139 1140#ifdef WPS_WORKAROUNDS 1141 if (reg->pbc_ignore_start.sec && 1142 os_memcmp(attr.uuid_e, reg->pbc_ignore_uuid, WPS_UUID_LEN) == 0) { 1143 struct os_time now, dur; 1144 os_get_time(&now); 1145 os_time_sub(&now, ®->pbc_ignore_start, &dur); 1146 if (dur.sec >= 0 && dur.sec < 5) { 1147 wpa_printf(MSG_DEBUG, "WPS: Ignore PBC activation " 1148 "based on Probe Request from the Enrollee " 1149 "that just completed PBC provisioning"); 1150 skip_add = 1; 1151 } else 1152 reg->pbc_ignore_start.sec = 0; 1153 } 1154#endif /* WPS_WORKAROUNDS */ 1155 1156 if (!skip_add) 1157 wps_registrar_add_pbc_session(reg, addr, attr.uuid_e); 1158 if (wps_registrar_pbc_overlap(reg, addr, attr.uuid_e)) { 1159 wpa_printf(MSG_DEBUG, "WPS: PBC session overlap detected"); 1160 reg->force_pbc_overlap = 1; 1161 wps_pbc_overlap_event(reg->wps); 1162 } 1163} 1164 1165 1166static int wps_cb_new_psk(struct wps_registrar *reg, const u8 *mac_addr, 1167 const u8 *p2p_dev_addr, const u8 *psk, size_t psk_len) 1168{ 1169 if (reg->new_psk_cb == NULL) 1170 return 0; 1171 1172 return reg->new_psk_cb(reg->cb_ctx, mac_addr, p2p_dev_addr, psk, 1173 psk_len); 1174} 1175 1176 1177static void wps_cb_pin_needed(struct wps_registrar *reg, const u8 *uuid_e, 1178 const struct wps_device_data *dev) 1179{ 1180 if (reg->pin_needed_cb == NULL) 1181 return; 1182 1183 reg->pin_needed_cb(reg->cb_ctx, uuid_e, dev); 1184} 1185 1186 1187static void wps_cb_reg_success(struct wps_registrar *reg, const u8 *mac_addr, 1188 const u8 *uuid_e, const u8 *dev_pw, 1189 size_t dev_pw_len) 1190{ 1191 if (reg->reg_success_cb == NULL) 1192 return; 1193 1194 reg->reg_success_cb(reg->cb_ctx, mac_addr, uuid_e, dev_pw, dev_pw_len); 1195} 1196 1197 1198static int wps_cb_set_ie(struct wps_registrar *reg, struct wpabuf *beacon_ie, 1199 struct wpabuf *probe_resp_ie) 1200{ 1201 return reg->set_ie_cb(reg->cb_ctx, beacon_ie, probe_resp_ie); 1202} 1203 1204 1205static void wps_cb_set_sel_reg(struct wps_registrar *reg) 1206{ 1207 u16 methods = 0; 1208 if (reg->set_sel_reg_cb == NULL) 1209 return; 1210 1211 if (reg->selected_registrar) { 1212 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 1213#ifdef CONFIG_WPS2 1214 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 1215 WPS_CONFIG_PHY_PUSHBUTTON); 1216#endif /* CONFIG_WPS2 */ 1217 if (reg->pbc) 1218 wps_set_pushbutton(&methods, reg->wps->config_methods); 1219 } 1220 1221 wpa_printf(MSG_DEBUG, "WPS: wps_cb_set_sel_reg: sel_reg=%d " 1222 "config_methods=0x%x pbc=%d methods=0x%x", 1223 reg->selected_registrar, reg->wps->config_methods, 1224 reg->pbc, methods); 1225 1226 reg->set_sel_reg_cb(reg->cb_ctx, reg->selected_registrar, 1227 reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT, 1228 methods); 1229} 1230 1231 1232static int wps_set_ie(struct wps_registrar *reg) 1233{ 1234 struct wpabuf *beacon; 1235 struct wpabuf *probe; 1236 const u8 *auth_macs; 1237 size_t count; 1238 size_t vendor_len = 0; 1239 int i; 1240 1241 if (reg->set_ie_cb == NULL) 1242 return 0; 1243 1244 for (i = 0; i < MAX_WPS_VENDOR_EXTENSIONS; i++) { 1245 if (reg->wps->dev.vendor_ext[i]) { 1246 vendor_len += 2 + 2; 1247 vendor_len += wpabuf_len(reg->wps->dev.vendor_ext[i]); 1248 } 1249 } 1250 1251 beacon = wpabuf_alloc(400 + vendor_len); 1252 if (beacon == NULL) 1253 return -1; 1254 probe = wpabuf_alloc(500 + vendor_len); 1255 if (probe == NULL) { 1256 wpabuf_free(beacon); 1257 return -1; 1258 } 1259 1260 auth_macs = wps_authorized_macs(reg, &count); 1261 1262 wpa_printf(MSG_DEBUG, "WPS: Build Beacon IEs"); 1263 1264 if (wps_build_version(beacon) || 1265 wps_build_wps_state(reg->wps, beacon) || 1266 wps_build_ap_setup_locked(reg->wps, beacon) || 1267 wps_build_selected_registrar(reg, beacon) || 1268 wps_build_sel_reg_dev_password_id(reg, beacon) || 1269 wps_build_sel_reg_config_methods(reg, beacon) || 1270 wps_build_sel_pbc_reg_uuid_e(reg, beacon) || 1271 (reg->dualband && wps_build_rf_bands(®->wps->dev, beacon, 0)) || 1272 wps_build_wfa_ext(beacon, 0, auth_macs, count) || 1273 wps_build_vendor_ext(®->wps->dev, beacon)) { 1274 wpabuf_free(beacon); 1275 wpabuf_free(probe); 1276 return -1; 1277 } 1278 1279#ifdef CONFIG_P2P 1280 if (wps_build_dev_name(®->wps->dev, beacon) || 1281 wps_build_primary_dev_type(®->wps->dev, beacon)) { 1282 wpabuf_free(beacon); 1283 wpabuf_free(probe); 1284 return -1; 1285 } 1286#endif /* CONFIG_P2P */ 1287 1288 wpa_printf(MSG_DEBUG, "WPS: Build Probe Response IEs"); 1289 1290 if (wps_build_version(probe) || 1291 wps_build_wps_state(reg->wps, probe) || 1292 wps_build_ap_setup_locked(reg->wps, probe) || 1293 wps_build_selected_registrar(reg, probe) || 1294 wps_build_sel_reg_dev_password_id(reg, probe) || 1295 wps_build_sel_reg_config_methods(reg, probe) || 1296 wps_build_resp_type(probe, reg->wps->ap ? WPS_RESP_AP : 1297 WPS_RESP_REGISTRAR) || 1298 wps_build_uuid_e(probe, reg->wps->uuid) || 1299 wps_build_device_attrs(®->wps->dev, probe) || 1300 wps_build_probe_config_methods(reg, probe) || 1301 (reg->dualband && wps_build_rf_bands(®->wps->dev, probe, 0)) || 1302 wps_build_wfa_ext(probe, 0, auth_macs, count) || 1303 wps_build_vendor_ext(®->wps->dev, probe)) { 1304 wpabuf_free(beacon); 1305 wpabuf_free(probe); 1306 return -1; 1307 } 1308 1309 beacon = wps_ie_encapsulate(beacon); 1310 probe = wps_ie_encapsulate(probe); 1311 1312 if (!beacon || !probe) { 1313 wpabuf_free(beacon); 1314 wpabuf_free(probe); 1315 return -1; 1316 } 1317 1318 if (reg->static_wep_only) { 1319 /* 1320 * Windows XP and Vista clients can get confused about 1321 * EAP-Identity/Request when they probe the network with 1322 * EAPOL-Start. In such a case, they may assume the network is 1323 * using IEEE 802.1X and prompt user for a certificate while 1324 * the correct (non-WPS) behavior would be to ask for the 1325 * static WEP key. As a workaround, use Microsoft Provisioning 1326 * IE to advertise that legacy 802.1X is not supported. 1327 */ 1328 const u8 ms_wps[7] = { 1329 WLAN_EID_VENDOR_SPECIFIC, 5, 1330 /* Microsoft Provisioning IE (00:50:f2:5) */ 1331 0x00, 0x50, 0xf2, 5, 1332 0x00 /* no legacy 802.1X or MS WPS */ 1333 }; 1334 wpa_printf(MSG_DEBUG, "WPS: Add Microsoft Provisioning IE " 1335 "into Beacon/Probe Response frames"); 1336 wpabuf_put_data(beacon, ms_wps, sizeof(ms_wps)); 1337 wpabuf_put_data(probe, ms_wps, sizeof(ms_wps)); 1338 } 1339 1340 return wps_cb_set_ie(reg, beacon, probe); 1341} 1342 1343 1344static int wps_get_dev_password(struct wps_data *wps) 1345{ 1346 const u8 *pin; 1347 size_t pin_len = 0; 1348 1349 os_free(wps->dev_password); 1350 wps->dev_password = NULL; 1351 1352 if (wps->pbc) { 1353 wpa_printf(MSG_DEBUG, "WPS: Use default PIN for PBC"); 1354 pin = (const u8 *) "00000000"; 1355 pin_len = 8; 1356#ifdef CONFIG_WPS_NFC 1357 } else if (wps->nfc_pw_token) { 1358 wpa_printf(MSG_DEBUG, "WPS: Use OOB Device Password from NFC " 1359 "Password Token"); 1360 pin = wps->nfc_pw_token->dev_pw; 1361 pin_len = wps->nfc_pw_token->dev_pw_len; 1362#endif /* CONFIG_WPS_NFC */ 1363 } else { 1364 pin = wps_registrar_get_pin(wps->wps->registrar, wps->uuid_e, 1365 &pin_len); 1366 if (pin && wps->dev_pw_id >= 0x10) { 1367 wpa_printf(MSG_DEBUG, "WPS: No match for OOB Device " 1368 "Password ID, but PIN found"); 1369 /* 1370 * See whether Enrollee is willing to use PIN instead. 1371 */ 1372 wps->dev_pw_id = DEV_PW_DEFAULT; 1373 } 1374 } 1375 if (pin == NULL) { 1376 wpa_printf(MSG_DEBUG, "WPS: No Device Password available for " 1377 "the Enrollee (context %p registrar %p)", 1378 wps->wps, wps->wps->registrar); 1379 wps_cb_pin_needed(wps->wps->registrar, wps->uuid_e, 1380 &wps->peer_dev); 1381 return -1; 1382 } 1383 1384 wps->dev_password = os_malloc(pin_len); 1385 if (wps->dev_password == NULL) 1386 return -1; 1387 os_memcpy(wps->dev_password, pin, pin_len); 1388 wps->dev_password_len = pin_len; 1389 1390 return 0; 1391} 1392 1393 1394static int wps_build_uuid_r(struct wps_data *wps, struct wpabuf *msg) 1395{ 1396 wpa_printf(MSG_DEBUG, "WPS: * UUID-R"); 1397 wpabuf_put_be16(msg, ATTR_UUID_R); 1398 wpabuf_put_be16(msg, WPS_UUID_LEN); 1399 wpabuf_put_data(msg, wps->uuid_r, WPS_UUID_LEN); 1400 return 0; 1401} 1402 1403 1404static int wps_build_r_hash(struct wps_data *wps, struct wpabuf *msg) 1405{ 1406 u8 *hash; 1407 const u8 *addr[4]; 1408 size_t len[4]; 1409 1410 if (random_get_bytes(wps->snonce, 2 * WPS_SECRET_NONCE_LEN) < 0) 1411 return -1; 1412 wpa_hexdump(MSG_DEBUG, "WPS: R-S1", wps->snonce, WPS_SECRET_NONCE_LEN); 1413 wpa_hexdump(MSG_DEBUG, "WPS: R-S2", 1414 wps->snonce + WPS_SECRET_NONCE_LEN, WPS_SECRET_NONCE_LEN); 1415 1416 if (wps->dh_pubkey_e == NULL || wps->dh_pubkey_r == NULL) { 1417 wpa_printf(MSG_DEBUG, "WPS: DH public keys not available for " 1418 "R-Hash derivation"); 1419 return -1; 1420 } 1421 1422 wpa_printf(MSG_DEBUG, "WPS: * R-Hash1"); 1423 wpabuf_put_be16(msg, ATTR_R_HASH1); 1424 wpabuf_put_be16(msg, SHA256_MAC_LEN); 1425 hash = wpabuf_put(msg, SHA256_MAC_LEN); 1426 /* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */ 1427 addr[0] = wps->snonce; 1428 len[0] = WPS_SECRET_NONCE_LEN; 1429 addr[1] = wps->psk1; 1430 len[1] = WPS_PSK_LEN; 1431 addr[2] = wpabuf_head(wps->dh_pubkey_e); 1432 len[2] = wpabuf_len(wps->dh_pubkey_e); 1433 addr[3] = wpabuf_head(wps->dh_pubkey_r); 1434 len[3] = wpabuf_len(wps->dh_pubkey_r); 1435 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 1436 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash1", hash, SHA256_MAC_LEN); 1437 1438 wpa_printf(MSG_DEBUG, "WPS: * R-Hash2"); 1439 wpabuf_put_be16(msg, ATTR_R_HASH2); 1440 wpabuf_put_be16(msg, SHA256_MAC_LEN); 1441 hash = wpabuf_put(msg, SHA256_MAC_LEN); 1442 /* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */ 1443 addr[0] = wps->snonce + WPS_SECRET_NONCE_LEN; 1444 addr[1] = wps->psk2; 1445 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 1446 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash2", hash, SHA256_MAC_LEN); 1447 1448 return 0; 1449} 1450 1451 1452static int wps_build_r_snonce1(struct wps_data *wps, struct wpabuf *msg) 1453{ 1454 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce1"); 1455 wpabuf_put_be16(msg, ATTR_R_SNONCE1); 1456 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN); 1457 wpabuf_put_data(msg, wps->snonce, WPS_SECRET_NONCE_LEN); 1458 return 0; 1459} 1460 1461 1462static int wps_build_r_snonce2(struct wps_data *wps, struct wpabuf *msg) 1463{ 1464 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce2"); 1465 wpabuf_put_be16(msg, ATTR_R_SNONCE2); 1466 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN); 1467 wpabuf_put_data(msg, wps->snonce + WPS_SECRET_NONCE_LEN, 1468 WPS_SECRET_NONCE_LEN); 1469 return 0; 1470} 1471 1472 1473static int wps_build_cred_network_idx(struct wpabuf *msg, 1474 const struct wps_credential *cred) 1475{ 1476 wpa_printf(MSG_DEBUG, "WPS: * Network Index (1)"); 1477 wpabuf_put_be16(msg, ATTR_NETWORK_INDEX); 1478 wpabuf_put_be16(msg, 1); 1479 wpabuf_put_u8(msg, 1); 1480 return 0; 1481} 1482 1483 1484static int wps_build_cred_ssid(struct wpabuf *msg, 1485 const struct wps_credential *cred) 1486{ 1487 wpa_printf(MSG_DEBUG, "WPS: * SSID"); 1488 wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID for Credential", 1489 cred->ssid, cred->ssid_len); 1490 wpabuf_put_be16(msg, ATTR_SSID); 1491 wpabuf_put_be16(msg, cred->ssid_len); 1492 wpabuf_put_data(msg, cred->ssid, cred->ssid_len); 1493 return 0; 1494} 1495 1496 1497static int wps_build_cred_auth_type(struct wpabuf *msg, 1498 const struct wps_credential *cred) 1499{ 1500 wpa_printf(MSG_DEBUG, "WPS: * Authentication Type (0x%x)", 1501 cred->auth_type); 1502 wpabuf_put_be16(msg, ATTR_AUTH_TYPE); 1503 wpabuf_put_be16(msg, 2); 1504 wpabuf_put_be16(msg, cred->auth_type); 1505 return 0; 1506} 1507 1508 1509static int wps_build_cred_encr_type(struct wpabuf *msg, 1510 const struct wps_credential *cred) 1511{ 1512 wpa_printf(MSG_DEBUG, "WPS: * Encryption Type (0x%x)", 1513 cred->encr_type); 1514 wpabuf_put_be16(msg, ATTR_ENCR_TYPE); 1515 wpabuf_put_be16(msg, 2); 1516 wpabuf_put_be16(msg, cred->encr_type); 1517 return 0; 1518} 1519 1520 1521static int wps_build_cred_network_key(struct wpabuf *msg, 1522 const struct wps_credential *cred) 1523{ 1524 wpa_printf(MSG_DEBUG, "WPS: * Network Key (len=%d)", 1525 (int) cred->key_len); 1526 wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key", 1527 cred->key, cred->key_len); 1528 wpabuf_put_be16(msg, ATTR_NETWORK_KEY); 1529 wpabuf_put_be16(msg, cred->key_len); 1530 wpabuf_put_data(msg, cred->key, cred->key_len); 1531 return 0; 1532} 1533 1534 1535static int wps_build_credential(struct wpabuf *msg, 1536 const struct wps_credential *cred) 1537{ 1538 if (wps_build_cred_network_idx(msg, cred) || 1539 wps_build_cred_ssid(msg, cred) || 1540 wps_build_cred_auth_type(msg, cred) || 1541 wps_build_cred_encr_type(msg, cred) || 1542 wps_build_cred_network_key(msg, cred) || 1543 wps_build_mac_addr(msg, cred->mac_addr)) 1544 return -1; 1545 return 0; 1546} 1547 1548 1549int wps_build_credential_wrap(struct wpabuf *msg, 1550 const struct wps_credential *cred) 1551{ 1552 struct wpabuf *wbuf; 1553 wbuf = wpabuf_alloc(200); 1554 if (wbuf == NULL) 1555 return -1; 1556 if (wps_build_credential(wbuf, cred)) { 1557 wpabuf_free(wbuf); 1558 return -1; 1559 } 1560 wpabuf_put_be16(msg, ATTR_CRED); 1561 wpabuf_put_be16(msg, wpabuf_len(wbuf)); 1562 wpabuf_put_buf(msg, wbuf); 1563 wpabuf_free(wbuf); 1564 return 0; 1565} 1566 1567 1568int wps_build_cred(struct wps_data *wps, struct wpabuf *msg) 1569{ 1570 struct wpabuf *cred; 1571 1572 if (wps->wps->registrar->skip_cred_build) 1573 goto skip_cred_build; 1574 1575 wpa_printf(MSG_DEBUG, "WPS: * Credential"); 1576 if (wps->use_cred) { 1577 os_memcpy(&wps->cred, wps->use_cred, sizeof(wps->cred)); 1578 goto use_provided; 1579 } 1580 os_memset(&wps->cred, 0, sizeof(wps->cred)); 1581 1582 os_memcpy(wps->cred.ssid, wps->wps->ssid, wps->wps->ssid_len); 1583 wps->cred.ssid_len = wps->wps->ssid_len; 1584 1585 /* Select the best authentication and encryption type */ 1586 if (wps->auth_type & WPS_AUTH_WPA2PSK) 1587 wps->auth_type = WPS_AUTH_WPA2PSK; 1588 else if (wps->auth_type & WPS_AUTH_WPAPSK) 1589 wps->auth_type = WPS_AUTH_WPAPSK; 1590 else if (wps->auth_type & WPS_AUTH_OPEN) 1591 wps->auth_type = WPS_AUTH_OPEN; 1592 else if (wps->auth_type & WPS_AUTH_SHARED) 1593 wps->auth_type = WPS_AUTH_SHARED; 1594 else { 1595 wpa_printf(MSG_DEBUG, "WPS: Unsupported auth_type 0x%x", 1596 wps->auth_type); 1597 return -1; 1598 } 1599 wps->cred.auth_type = wps->auth_type; 1600 1601 if (wps->auth_type == WPS_AUTH_WPA2PSK || 1602 wps->auth_type == WPS_AUTH_WPAPSK) { 1603 if (wps->encr_type & WPS_ENCR_AES) 1604 wps->encr_type = WPS_ENCR_AES; 1605 else if (wps->encr_type & WPS_ENCR_TKIP) 1606 wps->encr_type = WPS_ENCR_TKIP; 1607 else { 1608 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption " 1609 "type for WPA/WPA2"); 1610 return -1; 1611 } 1612 } else { 1613 if (wps->encr_type & WPS_ENCR_WEP) 1614 wps->encr_type = WPS_ENCR_WEP; 1615 else if (wps->encr_type & WPS_ENCR_NONE) 1616 wps->encr_type = WPS_ENCR_NONE; 1617 else { 1618 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption " 1619 "type for non-WPA/WPA2 mode"); 1620 return -1; 1621 } 1622 } 1623 wps->cred.encr_type = wps->encr_type; 1624 /* 1625 * Set MAC address in the Credential to be the Enrollee's MAC address 1626 */ 1627 os_memcpy(wps->cred.mac_addr, wps->mac_addr_e, ETH_ALEN); 1628 1629 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->wps->ap && 1630 !wps->wps->registrar->disable_auto_conf) { 1631 u8 r[16]; 1632 /* Generate a random passphrase */ 1633 if (random_get_bytes(r, sizeof(r)) < 0) 1634 return -1; 1635 os_free(wps->new_psk); 1636 wps->new_psk = base64_encode(r, sizeof(r), &wps->new_psk_len); 1637 if (wps->new_psk == NULL) 1638 return -1; 1639 wps->new_psk_len--; /* remove newline */ 1640 while (wps->new_psk_len && 1641 wps->new_psk[wps->new_psk_len - 1] == '=') 1642 wps->new_psk_len--; 1643 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Generated passphrase", 1644 wps->new_psk, wps->new_psk_len); 1645 os_memcpy(wps->cred.key, wps->new_psk, wps->new_psk_len); 1646 wps->cred.key_len = wps->new_psk_len; 1647 } else if (!wps->wps->registrar->force_per_enrollee_psk && 1648 wps->use_psk_key && wps->wps->psk_set) { 1649 char hex[65]; 1650 wpa_printf(MSG_DEBUG, "WPS: Use PSK format for Network Key"); 1651 wpa_snprintf_hex(hex, sizeof(hex), wps->wps->psk, 32); 1652 os_memcpy(wps->cred.key, hex, 32 * 2); 1653 wps->cred.key_len = 32 * 2; 1654 } else if (!wps->wps->registrar->force_per_enrollee_psk && 1655 wps->wps->network_key) { 1656 os_memcpy(wps->cred.key, wps->wps->network_key, 1657 wps->wps->network_key_len); 1658 wps->cred.key_len = wps->wps->network_key_len; 1659 } else if (wps->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) { 1660 char hex[65]; 1661 /* Generate a random per-device PSK */ 1662 os_free(wps->new_psk); 1663 wps->new_psk_len = 32; 1664 wps->new_psk = os_malloc(wps->new_psk_len); 1665 if (wps->new_psk == NULL) 1666 return -1; 1667 if (random_get_bytes(wps->new_psk, wps->new_psk_len) < 0) { 1668 os_free(wps->new_psk); 1669 wps->new_psk = NULL; 1670 return -1; 1671 } 1672 wpa_hexdump_key(MSG_DEBUG, "WPS: Generated per-device PSK", 1673 wps->new_psk, wps->new_psk_len); 1674 wpa_snprintf_hex(hex, sizeof(hex), wps->new_psk, 1675 wps->new_psk_len); 1676 os_memcpy(wps->cred.key, hex, wps->new_psk_len * 2); 1677 wps->cred.key_len = wps->new_psk_len * 2; 1678 } 1679 1680use_provided: 1681#ifdef CONFIG_WPS_TESTING 1682 if (wps_testing_dummy_cred) 1683 cred = wpabuf_alloc(200); 1684 else 1685 cred = NULL; 1686 if (cred) { 1687 struct wps_credential dummy; 1688 wpa_printf(MSG_DEBUG, "WPS: Add dummy credential"); 1689 os_memset(&dummy, 0, sizeof(dummy)); 1690 os_memcpy(dummy.ssid, "dummy", 5); 1691 dummy.ssid_len = 5; 1692 dummy.auth_type = WPS_AUTH_WPA2PSK; 1693 dummy.encr_type = WPS_ENCR_AES; 1694 os_memcpy(dummy.key, "dummy psk", 9); 1695 dummy.key_len = 9; 1696 os_memcpy(dummy.mac_addr, wps->mac_addr_e, ETH_ALEN); 1697 wps_build_credential(cred, &dummy); 1698 wpa_hexdump_buf(MSG_DEBUG, "WPS: Dummy Credential", cred); 1699 1700 wpabuf_put_be16(msg, ATTR_CRED); 1701 wpabuf_put_be16(msg, wpabuf_len(cred)); 1702 wpabuf_put_buf(msg, cred); 1703 1704 wpabuf_free(cred); 1705 } 1706#endif /* CONFIG_WPS_TESTING */ 1707 1708 cred = wpabuf_alloc(200); 1709 if (cred == NULL) 1710 return -1; 1711 1712 if (wps_build_credential(cred, &wps->cred)) { 1713 wpabuf_free(cred); 1714 return -1; 1715 } 1716 1717 wpabuf_put_be16(msg, ATTR_CRED); 1718 wpabuf_put_be16(msg, wpabuf_len(cred)); 1719 wpabuf_put_buf(msg, cred); 1720 wpabuf_free(cred); 1721 1722skip_cred_build: 1723 if (wps->wps->registrar->extra_cred) { 1724 wpa_printf(MSG_DEBUG, "WPS: * Credential (pre-configured)"); 1725 wpabuf_put_buf(msg, wps->wps->registrar->extra_cred); 1726 } 1727 1728 return 0; 1729} 1730 1731 1732static int wps_build_ap_settings(struct wps_data *wps, struct wpabuf *msg) 1733{ 1734 wpa_printf(MSG_DEBUG, "WPS: * AP Settings"); 1735 1736 if (wps_build_credential(msg, &wps->cred)) 1737 return -1; 1738 1739 return 0; 1740} 1741 1742 1743static struct wpabuf * wps_build_ap_cred(struct wps_data *wps) 1744{ 1745 struct wpabuf *msg, *plain; 1746 1747 msg = wpabuf_alloc(1000); 1748 if (msg == NULL) 1749 return NULL; 1750 1751 plain = wpabuf_alloc(200); 1752 if (plain == NULL) { 1753 wpabuf_free(msg); 1754 return NULL; 1755 } 1756 1757 if (wps_build_ap_settings(wps, plain)) { 1758 wpabuf_free(plain); 1759 wpabuf_free(msg); 1760 return NULL; 1761 } 1762 1763 wpabuf_put_be16(msg, ATTR_CRED); 1764 wpabuf_put_be16(msg, wpabuf_len(plain)); 1765 wpabuf_put_buf(msg, plain); 1766 wpabuf_free(plain); 1767 1768 return msg; 1769} 1770 1771 1772static struct wpabuf * wps_build_m2(struct wps_data *wps) 1773{ 1774 struct wpabuf *msg; 1775 1776 if (random_get_bytes(wps->nonce_r, WPS_NONCE_LEN) < 0) 1777 return NULL; 1778 wpa_hexdump(MSG_DEBUG, "WPS: Registrar Nonce", 1779 wps->nonce_r, WPS_NONCE_LEN); 1780 wpa_hexdump(MSG_DEBUG, "WPS: UUID-R", wps->uuid_r, WPS_UUID_LEN); 1781 1782 wpa_printf(MSG_DEBUG, "WPS: Building Message M2"); 1783 msg = wpabuf_alloc(1000); 1784 if (msg == NULL) 1785 return NULL; 1786 1787 if (wps_build_version(msg) || 1788 wps_build_msg_type(msg, WPS_M2) || 1789 wps_build_enrollee_nonce(wps, msg) || 1790 wps_build_registrar_nonce(wps, msg) || 1791 wps_build_uuid_r(wps, msg) || 1792 wps_build_public_key(wps, msg) || 1793 wps_derive_keys(wps) || 1794 wps_build_auth_type_flags(wps, msg) || 1795 wps_build_encr_type_flags(wps, msg) || 1796 wps_build_conn_type_flags(wps, msg) || 1797 wps_build_config_methods_r(wps->wps->registrar, msg) || 1798 wps_build_device_attrs(&wps->wps->dev, msg) || 1799 wps_build_rf_bands(&wps->wps->dev, msg, 1800 wps->wps->rf_band_cb(wps->wps->cb_ctx)) || 1801 wps_build_assoc_state(wps, msg) || 1802 wps_build_config_error(msg, WPS_CFG_NO_ERROR) || 1803 wps_build_dev_password_id(msg, wps->dev_pw_id) || 1804 wps_build_os_version(&wps->wps->dev, msg) || 1805 wps_build_wfa_ext(msg, 0, NULL, 0) || 1806 wps_build_authenticator(wps, msg)) { 1807 wpabuf_free(msg); 1808 return NULL; 1809 } 1810 1811 wps->int_reg = 1; 1812 wps->state = RECV_M3; 1813 return msg; 1814} 1815 1816 1817static struct wpabuf * wps_build_m2d(struct wps_data *wps) 1818{ 1819 struct wpabuf *msg; 1820 u16 err = wps->config_error; 1821 1822 wpa_printf(MSG_DEBUG, "WPS: Building Message M2D"); 1823 msg = wpabuf_alloc(1000); 1824 if (msg == NULL) 1825 return NULL; 1826 1827 if (wps->wps->ap && wps->wps->ap_setup_locked && 1828 err == WPS_CFG_NO_ERROR) 1829 err = WPS_CFG_SETUP_LOCKED; 1830 1831 if (wps_build_version(msg) || 1832 wps_build_msg_type(msg, WPS_M2D) || 1833 wps_build_enrollee_nonce(wps, msg) || 1834 wps_build_registrar_nonce(wps, msg) || 1835 wps_build_uuid_r(wps, msg) || 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, err) || 1845 wps_build_os_version(&wps->wps->dev, msg) || 1846 wps_build_wfa_ext(msg, 0, NULL, 0)) { 1847 wpabuf_free(msg); 1848 return NULL; 1849 } 1850 1851 wps->state = RECV_M2D_ACK; 1852 return msg; 1853} 1854 1855 1856static struct wpabuf * wps_build_m4(struct wps_data *wps) 1857{ 1858 struct wpabuf *msg, *plain; 1859 1860 wpa_printf(MSG_DEBUG, "WPS: Building Message M4"); 1861 1862 wps_derive_psk(wps, wps->dev_password, wps->dev_password_len); 1863 1864 plain = wpabuf_alloc(200); 1865 if (plain == NULL) 1866 return NULL; 1867 1868 msg = wpabuf_alloc(1000); 1869 if (msg == NULL) { 1870 wpabuf_free(plain); 1871 return NULL; 1872 } 1873 1874 if (wps_build_version(msg) || 1875 wps_build_msg_type(msg, WPS_M4) || 1876 wps_build_enrollee_nonce(wps, msg) || 1877 wps_build_r_hash(wps, msg) || 1878 wps_build_r_snonce1(wps, plain) || 1879 wps_build_key_wrap_auth(wps, plain) || 1880 wps_build_encr_settings(wps, msg, plain) || 1881 wps_build_wfa_ext(msg, 0, NULL, 0) || 1882 wps_build_authenticator(wps, msg)) { 1883 wpabuf_free(plain); 1884 wpabuf_free(msg); 1885 return NULL; 1886 } 1887 wpabuf_free(plain); 1888 1889 wps->state = RECV_M5; 1890 return msg; 1891} 1892 1893 1894static struct wpabuf * wps_build_m6(struct wps_data *wps) 1895{ 1896 struct wpabuf *msg, *plain; 1897 1898 wpa_printf(MSG_DEBUG, "WPS: Building Message M6"); 1899 1900 plain = wpabuf_alloc(200); 1901 if (plain == NULL) 1902 return NULL; 1903 1904 msg = wpabuf_alloc(1000); 1905 if (msg == NULL) { 1906 wpabuf_free(plain); 1907 return NULL; 1908 } 1909 1910 if (wps_build_version(msg) || 1911 wps_build_msg_type(msg, WPS_M6) || 1912 wps_build_enrollee_nonce(wps, msg) || 1913 wps_build_r_snonce2(wps, plain) || 1914 wps_build_key_wrap_auth(wps, plain) || 1915 wps_build_encr_settings(wps, msg, plain) || 1916 wps_build_wfa_ext(msg, 0, NULL, 0) || 1917 wps_build_authenticator(wps, msg)) { 1918 wpabuf_free(plain); 1919 wpabuf_free(msg); 1920 return NULL; 1921 } 1922 wpabuf_free(plain); 1923 1924 wps->wps_pin_revealed = 1; 1925 wps->state = RECV_M7; 1926 return msg; 1927} 1928 1929 1930static struct wpabuf * wps_build_m8(struct wps_data *wps) 1931{ 1932 struct wpabuf *msg, *plain; 1933 1934 wpa_printf(MSG_DEBUG, "WPS: Building Message M8"); 1935 1936 plain = wpabuf_alloc(500); 1937 if (plain == NULL) 1938 return NULL; 1939 1940 msg = wpabuf_alloc(1000); 1941 if (msg == NULL) { 1942 wpabuf_free(plain); 1943 return NULL; 1944 } 1945 1946 if (wps_build_version(msg) || 1947 wps_build_msg_type(msg, WPS_M8) || 1948 wps_build_enrollee_nonce(wps, msg) || 1949 ((wps->wps->ap || wps->er) && wps_build_cred(wps, plain)) || 1950 (!wps->wps->ap && !wps->er && wps_build_ap_settings(wps, plain)) || 1951 wps_build_key_wrap_auth(wps, plain) || 1952 wps_build_encr_settings(wps, msg, plain) || 1953 wps_build_wfa_ext(msg, 0, NULL, 0) || 1954 wps_build_authenticator(wps, msg)) { 1955 wpabuf_free(plain); 1956 wpabuf_free(msg); 1957 return NULL; 1958 } 1959 wpabuf_free(plain); 1960 1961 wps->state = RECV_DONE; 1962 return msg; 1963} 1964 1965 1966struct wpabuf * wps_registrar_get_msg(struct wps_data *wps, 1967 enum wsc_op_code *op_code) 1968{ 1969 struct wpabuf *msg; 1970 1971#ifdef CONFIG_WPS_UPNP 1972 if (!wps->int_reg && wps->wps->wps_upnp) { 1973 struct upnp_pending_message *p, *prev = NULL; 1974 if (wps->ext_reg > 1) 1975 wps_registrar_free_pending_m2(wps->wps); 1976 p = wps->wps->upnp_msgs; 1977 /* TODO: check pending message MAC address */ 1978 while (p && p->next) { 1979 prev = p; 1980 p = p->next; 1981 } 1982 if (p) { 1983 wpa_printf(MSG_DEBUG, "WPS: Use pending message from " 1984 "UPnP"); 1985 if (prev) 1986 prev->next = NULL; 1987 else 1988 wps->wps->upnp_msgs = NULL; 1989 msg = p->msg; 1990 switch (p->type) { 1991 case WPS_WSC_ACK: 1992 *op_code = WSC_ACK; 1993 break; 1994 case WPS_WSC_NACK: 1995 *op_code = WSC_NACK; 1996 break; 1997 default: 1998 *op_code = WSC_MSG; 1999 break; 2000 } 2001 os_free(p); 2002 if (wps->ext_reg == 0) 2003 wps->ext_reg = 1; 2004 return msg; 2005 } 2006 } 2007 if (wps->ext_reg) { 2008 wpa_printf(MSG_DEBUG, "WPS: Using external Registrar, but no " 2009 "pending message available"); 2010 return NULL; 2011 } 2012#endif /* CONFIG_WPS_UPNP */ 2013 2014 switch (wps->state) { 2015 case SEND_M2: 2016 if (wps_get_dev_password(wps) < 0) 2017 msg = wps_build_m2d(wps); 2018 else 2019 msg = wps_build_m2(wps); 2020 *op_code = WSC_MSG; 2021 break; 2022 case SEND_M2D: 2023 msg = wps_build_m2d(wps); 2024 *op_code = WSC_MSG; 2025 break; 2026 case SEND_M4: 2027 msg = wps_build_m4(wps); 2028 *op_code = WSC_MSG; 2029 break; 2030 case SEND_M6: 2031 msg = wps_build_m6(wps); 2032 *op_code = WSC_MSG; 2033 break; 2034 case SEND_M8: 2035 msg = wps_build_m8(wps); 2036 *op_code = WSC_MSG; 2037 break; 2038 case RECV_DONE: 2039 msg = wps_build_wsc_ack(wps); 2040 *op_code = WSC_ACK; 2041 break; 2042 case SEND_WSC_NACK: 2043 msg = wps_build_wsc_nack(wps); 2044 *op_code = WSC_NACK; 2045 break; 2046 default: 2047 wpa_printf(MSG_DEBUG, "WPS: Unsupported state %d for building " 2048 "a message", wps->state); 2049 msg = NULL; 2050 break; 2051 } 2052 2053 if (*op_code == WSC_MSG && msg) { 2054 /* Save a copy of the last message for Authenticator derivation 2055 */ 2056 wpabuf_free(wps->last_msg); 2057 wps->last_msg = wpabuf_dup(msg); 2058 } 2059 2060 return msg; 2061} 2062 2063 2064static int wps_process_enrollee_nonce(struct wps_data *wps, const u8 *e_nonce) 2065{ 2066 if (e_nonce == NULL) { 2067 wpa_printf(MSG_DEBUG, "WPS: No Enrollee Nonce received"); 2068 return -1; 2069 } 2070 2071 os_memcpy(wps->nonce_e, e_nonce, WPS_NONCE_LEN); 2072 wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce", 2073 wps->nonce_e, WPS_NONCE_LEN); 2074 2075 return 0; 2076} 2077 2078 2079static int wps_process_registrar_nonce(struct wps_data *wps, const u8 *r_nonce) 2080{ 2081 if (r_nonce == NULL) { 2082 wpa_printf(MSG_DEBUG, "WPS: No Registrar Nonce received"); 2083 return -1; 2084 } 2085 2086 if (os_memcmp(wps->nonce_r, r_nonce, WPS_NONCE_LEN) != 0) { 2087 wpa_printf(MSG_DEBUG, "WPS: Invalid Registrar Nonce received"); 2088 return -1; 2089 } 2090 2091 return 0; 2092} 2093 2094 2095static int wps_process_uuid_e(struct wps_data *wps, const u8 *uuid_e) 2096{ 2097 if (uuid_e == NULL) { 2098 wpa_printf(MSG_DEBUG, "WPS: No UUID-E received"); 2099 return -1; 2100 } 2101 2102 os_memcpy(wps->uuid_e, uuid_e, WPS_UUID_LEN); 2103 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", wps->uuid_e, WPS_UUID_LEN); 2104 2105 return 0; 2106} 2107 2108 2109static int wps_process_dev_password_id(struct wps_data *wps, const u8 *pw_id) 2110{ 2111 if (pw_id == NULL) { 2112 wpa_printf(MSG_DEBUG, "WPS: No Device Password ID received"); 2113 return -1; 2114 } 2115 2116 wps->dev_pw_id = WPA_GET_BE16(pw_id); 2117 wpa_printf(MSG_DEBUG, "WPS: Device Password ID %d", wps->dev_pw_id); 2118 2119 return 0; 2120} 2121 2122 2123static int wps_process_e_hash1(struct wps_data *wps, const u8 *e_hash1) 2124{ 2125 if (e_hash1 == NULL) { 2126 wpa_printf(MSG_DEBUG, "WPS: No E-Hash1 received"); 2127 return -1; 2128 } 2129 2130 os_memcpy(wps->peer_hash1, e_hash1, WPS_HASH_LEN); 2131 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash1", wps->peer_hash1, WPS_HASH_LEN); 2132 2133 return 0; 2134} 2135 2136 2137static int wps_process_e_hash2(struct wps_data *wps, const u8 *e_hash2) 2138{ 2139 if (e_hash2 == NULL) { 2140 wpa_printf(MSG_DEBUG, "WPS: No E-Hash2 received"); 2141 return -1; 2142 } 2143 2144 os_memcpy(wps->peer_hash2, e_hash2, WPS_HASH_LEN); 2145 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash2", wps->peer_hash2, WPS_HASH_LEN); 2146 2147 return 0; 2148} 2149 2150 2151static int wps_process_e_snonce1(struct wps_data *wps, const u8 *e_snonce1) 2152{ 2153 u8 hash[SHA256_MAC_LEN]; 2154 const u8 *addr[4]; 2155 size_t len[4]; 2156 2157 if (e_snonce1 == NULL) { 2158 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce1 received"); 2159 return -1; 2160 } 2161 2162 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce1", e_snonce1, 2163 WPS_SECRET_NONCE_LEN); 2164 2165 /* E-Hash1 = HMAC_AuthKey(E-S1 || PSK1 || PK_E || PK_R) */ 2166 addr[0] = e_snonce1; 2167 len[0] = WPS_SECRET_NONCE_LEN; 2168 addr[1] = wps->psk1; 2169 len[1] = WPS_PSK_LEN; 2170 addr[2] = wpabuf_head(wps->dh_pubkey_e); 2171 len[2] = wpabuf_len(wps->dh_pubkey_e); 2172 addr[3] = wpabuf_head(wps->dh_pubkey_r); 2173 len[3] = wpabuf_len(wps->dh_pubkey_r); 2174 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 2175 2176 if (os_memcmp(wps->peer_hash1, hash, WPS_HASH_LEN) != 0) { 2177 wpa_printf(MSG_DEBUG, "WPS: E-Hash1 derived from E-S1 does " 2178 "not match with the pre-committed value"); 2179 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE; 2180 wps_pwd_auth_fail_event(wps->wps, 0, 1, wps->mac_addr_e); 2181 return -1; 2182 } 2183 2184 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the first " 2185 "half of the device password"); 2186 2187 return 0; 2188} 2189 2190 2191static int wps_process_e_snonce2(struct wps_data *wps, const u8 *e_snonce2) 2192{ 2193 u8 hash[SHA256_MAC_LEN]; 2194 const u8 *addr[4]; 2195 size_t len[4]; 2196 2197 if (e_snonce2 == NULL) { 2198 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce2 received"); 2199 return -1; 2200 } 2201 2202 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce2", e_snonce2, 2203 WPS_SECRET_NONCE_LEN); 2204 2205 /* E-Hash2 = HMAC_AuthKey(E-S2 || PSK2 || PK_E || PK_R) */ 2206 addr[0] = e_snonce2; 2207 len[0] = WPS_SECRET_NONCE_LEN; 2208 addr[1] = wps->psk2; 2209 len[1] = WPS_PSK_LEN; 2210 addr[2] = wpabuf_head(wps->dh_pubkey_e); 2211 len[2] = wpabuf_len(wps->dh_pubkey_e); 2212 addr[3] = wpabuf_head(wps->dh_pubkey_r); 2213 len[3] = wpabuf_len(wps->dh_pubkey_r); 2214 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 2215 2216 if (os_memcmp(wps->peer_hash2, hash, WPS_HASH_LEN) != 0) { 2217 wpa_printf(MSG_DEBUG, "WPS: E-Hash2 derived from E-S2 does " 2218 "not match with the pre-committed value"); 2219 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e); 2220 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE; 2221 wps_pwd_auth_fail_event(wps->wps, 0, 2, wps->mac_addr_e); 2222 return -1; 2223 } 2224 2225 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the second " 2226 "half of the device password"); 2227 wps->wps_pin_revealed = 0; 2228 wps_registrar_unlock_pin(wps->wps->registrar, wps->uuid_e); 2229 2230 /* 2231 * In case wildcard PIN is used and WPS handshake succeeds in the first 2232 * attempt, wps_registrar_unlock_pin() would not free the PIN, so make 2233 * sure the PIN gets invalidated here. 2234 */ 2235 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e); 2236 2237 return 0; 2238} 2239 2240 2241static int wps_process_mac_addr(struct wps_data *wps, const u8 *mac_addr) 2242{ 2243 if (mac_addr == NULL) { 2244 wpa_printf(MSG_DEBUG, "WPS: No MAC Address received"); 2245 return -1; 2246 } 2247 2248 wpa_printf(MSG_DEBUG, "WPS: Enrollee MAC Address " MACSTR, 2249 MAC2STR(mac_addr)); 2250 os_memcpy(wps->mac_addr_e, mac_addr, ETH_ALEN); 2251 os_memcpy(wps->peer_dev.mac_addr, mac_addr, ETH_ALEN); 2252 2253 return 0; 2254} 2255 2256 2257static int wps_process_pubkey(struct wps_data *wps, const u8 *pk, 2258 size_t pk_len) 2259{ 2260 if (pk == NULL || pk_len == 0) { 2261 wpa_printf(MSG_DEBUG, "WPS: No Public Key received"); 2262 return -1; 2263 } 2264 2265 wpabuf_free(wps->dh_pubkey_e); 2266 wps->dh_pubkey_e = wpabuf_alloc_copy(pk, pk_len); 2267 if (wps->dh_pubkey_e == NULL) 2268 return -1; 2269 2270 return 0; 2271} 2272 2273 2274static int wps_process_auth_type_flags(struct wps_data *wps, const u8 *auth) 2275{ 2276 u16 auth_types; 2277 2278 if (auth == NULL) { 2279 wpa_printf(MSG_DEBUG, "WPS: No Authentication Type flags " 2280 "received"); 2281 return -1; 2282 } 2283 2284 auth_types = WPA_GET_BE16(auth); 2285 2286 wpa_printf(MSG_DEBUG, "WPS: Enrollee Authentication Type flags 0x%x", 2287 auth_types); 2288 wps->auth_type = wps->wps->auth_types & auth_types; 2289 if (wps->auth_type == 0) { 2290 wpa_printf(MSG_DEBUG, "WPS: No match in supported " 2291 "authentication types (own 0x%x Enrollee 0x%x)", 2292 wps->wps->auth_types, auth_types); 2293#ifdef WPS_WORKAROUNDS 2294 /* 2295 * Some deployed implementations seem to advertise incorrect 2296 * information in this attribute. For example, Linksys WRT350N 2297 * seems to have a byteorder bug that breaks this negotiation. 2298 * In order to interoperate with existing implementations, 2299 * assume that the Enrollee supports everything we do. 2300 */ 2301 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee " 2302 "does not advertise supported authentication types " 2303 "correctly"); 2304 wps->auth_type = wps->wps->auth_types; 2305#else /* WPS_WORKAROUNDS */ 2306 return -1; 2307#endif /* WPS_WORKAROUNDS */ 2308 } 2309 2310 return 0; 2311} 2312 2313 2314static int wps_process_encr_type_flags(struct wps_data *wps, const u8 *encr) 2315{ 2316 u16 encr_types; 2317 2318 if (encr == NULL) { 2319 wpa_printf(MSG_DEBUG, "WPS: No Encryption Type flags " 2320 "received"); 2321 return -1; 2322 } 2323 2324 encr_types = WPA_GET_BE16(encr); 2325 2326 wpa_printf(MSG_DEBUG, "WPS: Enrollee Encryption Type flags 0x%x", 2327 encr_types); 2328 wps->encr_type = wps->wps->encr_types & encr_types; 2329 if (wps->encr_type == 0) { 2330 wpa_printf(MSG_DEBUG, "WPS: No match in supported " 2331 "encryption types (own 0x%x Enrollee 0x%x)", 2332 wps->wps->encr_types, encr_types); 2333#ifdef WPS_WORKAROUNDS 2334 /* 2335 * Some deployed implementations seem to advertise incorrect 2336 * information in this attribute. For example, Linksys WRT350N 2337 * seems to have a byteorder bug that breaks this negotiation. 2338 * In order to interoperate with existing implementations, 2339 * assume that the Enrollee supports everything we do. 2340 */ 2341 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee " 2342 "does not advertise supported encryption types " 2343 "correctly"); 2344 wps->encr_type = wps->wps->encr_types; 2345#else /* WPS_WORKAROUNDS */ 2346 return -1; 2347#endif /* WPS_WORKAROUNDS */ 2348 } 2349 2350 return 0; 2351} 2352 2353 2354static int wps_process_conn_type_flags(struct wps_data *wps, const u8 *conn) 2355{ 2356 if (conn == NULL) { 2357 wpa_printf(MSG_DEBUG, "WPS: No Connection Type flags " 2358 "received"); 2359 return -1; 2360 } 2361 2362 wpa_printf(MSG_DEBUG, "WPS: Enrollee Connection Type flags 0x%x", 2363 *conn); 2364 2365 return 0; 2366} 2367 2368 2369static int wps_process_config_methods(struct wps_data *wps, const u8 *methods) 2370{ 2371 u16 m; 2372 2373 if (methods == NULL) { 2374 wpa_printf(MSG_DEBUG, "WPS: No Config Methods received"); 2375 return -1; 2376 } 2377 2378 m = WPA_GET_BE16(methods); 2379 2380 wpa_printf(MSG_DEBUG, "WPS: Enrollee Config Methods 0x%x" 2381 "%s%s%s%s%s%s%s%s%s", m, 2382 m & WPS_CONFIG_USBA ? " [USBA]" : "", 2383 m & WPS_CONFIG_ETHERNET ? " [Ethernet]" : "", 2384 m & WPS_CONFIG_LABEL ? " [Label]" : "", 2385 m & WPS_CONFIG_DISPLAY ? " [Display]" : "", 2386 m & WPS_CONFIG_EXT_NFC_TOKEN ? " [Ext NFC Token]" : "", 2387 m & WPS_CONFIG_INT_NFC_TOKEN ? " [Int NFC Token]" : "", 2388 m & WPS_CONFIG_NFC_INTERFACE ? " [NFC]" : "", 2389 m & WPS_CONFIG_PUSHBUTTON ? " [PBC]" : "", 2390 m & WPS_CONFIG_KEYPAD ? " [Keypad]" : ""); 2391 2392 if (!(m & WPS_CONFIG_DISPLAY) && !wps->use_psk_key) { 2393 /* 2394 * The Enrollee does not have a display so it is unlikely to be 2395 * able to show the passphrase to a user and as such, could 2396 * benefit from receiving PSK to reduce key derivation time. 2397 */ 2398 wpa_printf(MSG_DEBUG, "WPS: Prefer PSK format key due to " 2399 "Enrollee not supporting display"); 2400 wps->use_psk_key = 1; 2401 } 2402 2403 return 0; 2404} 2405 2406 2407static int wps_process_wps_state(struct wps_data *wps, const u8 *state) 2408{ 2409 if (state == NULL) { 2410 wpa_printf(MSG_DEBUG, "WPS: No Wi-Fi Protected Setup State " 2411 "received"); 2412 return -1; 2413 } 2414 2415 wpa_printf(MSG_DEBUG, "WPS: Enrollee Wi-Fi Protected Setup State %d", 2416 *state); 2417 2418 return 0; 2419} 2420 2421 2422static int wps_process_assoc_state(struct wps_data *wps, const u8 *assoc) 2423{ 2424 u16 a; 2425 2426 if (assoc == NULL) { 2427 wpa_printf(MSG_DEBUG, "WPS: No Association State received"); 2428 return -1; 2429 } 2430 2431 a = WPA_GET_BE16(assoc); 2432 wpa_printf(MSG_DEBUG, "WPS: Enrollee Association State %d", a); 2433 2434 return 0; 2435} 2436 2437 2438static int wps_process_config_error(struct wps_data *wps, const u8 *err) 2439{ 2440 u16 e; 2441 2442 if (err == NULL) { 2443 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error received"); 2444 return -1; 2445 } 2446 2447 e = WPA_GET_BE16(err); 2448 wpa_printf(MSG_DEBUG, "WPS: Enrollee Configuration Error %d", e); 2449 2450 return 0; 2451} 2452 2453 2454static int wps_registrar_p2p_dev_addr_match(struct wps_data *wps) 2455{ 2456#ifdef CONFIG_P2P 2457 struct wps_registrar *reg = wps->wps->registrar; 2458 2459 if (is_zero_ether_addr(reg->p2p_dev_addr)) 2460 return 1; /* no filtering in use */ 2461 2462 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) != 0) { 2463 wpa_printf(MSG_DEBUG, "WPS: No match on P2P Device Address " 2464 "filtering for PBC: expected " MACSTR " was " 2465 MACSTR " - indicate PBC session overlap", 2466 MAC2STR(reg->p2p_dev_addr), 2467 MAC2STR(wps->p2p_dev_addr)); 2468 return 0; 2469 } 2470#endif /* CONFIG_P2P */ 2471 return 1; 2472} 2473 2474 2475static int wps_registrar_skip_overlap(struct wps_data *wps) 2476{ 2477#ifdef CONFIG_P2P 2478 struct wps_registrar *reg = wps->wps->registrar; 2479 2480 if (is_zero_ether_addr(reg->p2p_dev_addr)) 2481 return 0; /* no specific Enrollee selected */ 2482 2483 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) == 0) { 2484 wpa_printf(MSG_DEBUG, "WPS: Skip PBC overlap due to selected " 2485 "Enrollee match"); 2486 return 1; 2487 } 2488#endif /* CONFIG_P2P */ 2489 return 0; 2490} 2491 2492 2493static enum wps_process_res wps_process_m1(struct wps_data *wps, 2494 struct wps_parse_attr *attr) 2495{ 2496 wpa_printf(MSG_DEBUG, "WPS: Received M1"); 2497 2498 if (wps->state != RECV_M1) { 2499 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2500 "receiving M1", wps->state); 2501 return WPS_FAILURE; 2502 } 2503 2504 if (wps_process_uuid_e(wps, attr->uuid_e) || 2505 wps_process_mac_addr(wps, attr->mac_addr) || 2506 wps_process_enrollee_nonce(wps, attr->enrollee_nonce) || 2507 wps_process_pubkey(wps, attr->public_key, attr->public_key_len) || 2508 wps_process_auth_type_flags(wps, attr->auth_type_flags) || 2509 wps_process_encr_type_flags(wps, attr->encr_type_flags) || 2510 wps_process_conn_type_flags(wps, attr->conn_type_flags) || 2511 wps_process_config_methods(wps, attr->config_methods) || 2512 wps_process_wps_state(wps, attr->wps_state) || 2513 wps_process_device_attrs(&wps->peer_dev, attr) || 2514 wps_process_rf_bands(&wps->peer_dev, attr->rf_bands) || 2515 wps_process_assoc_state(wps, attr->assoc_state) || 2516 wps_process_dev_password_id(wps, attr->dev_password_id) || 2517 wps_process_config_error(wps, attr->config_error) || 2518 wps_process_os_version(&wps->peer_dev, attr->os_version)) 2519 return WPS_FAILURE; 2520 2521 if (wps->dev_pw_id < 0x10 && 2522 wps->dev_pw_id != DEV_PW_DEFAULT && 2523 wps->dev_pw_id != DEV_PW_USER_SPECIFIED && 2524 wps->dev_pw_id != DEV_PW_MACHINE_SPECIFIED && 2525 wps->dev_pw_id != DEV_PW_REGISTRAR_SPECIFIED && 2526 (wps->dev_pw_id != DEV_PW_PUSHBUTTON || 2527 !wps->wps->registrar->pbc)) { 2528 wpa_printf(MSG_DEBUG, "WPS: Unsupported Device Password ID %d", 2529 wps->dev_pw_id); 2530 wps->state = SEND_M2D; 2531 return WPS_CONTINUE; 2532 } 2533 2534#ifdef CONFIG_WPS_NFC 2535 if (wps->dev_pw_id >= 0x10) { 2536 struct wps_nfc_pw_token *token; 2537 const u8 *addr[1]; 2538 u8 hash[WPS_HASH_LEN]; 2539 2540 wpa_printf(MSG_DEBUG, "WPS: Searching for NFC token match for id=%d (ctx %p registrar %p)", 2541 wps->dev_pw_id, wps->wps, wps->wps->registrar); 2542 token = wps_get_nfc_pw_token( 2543 &wps->wps->registrar->nfc_pw_tokens, wps->dev_pw_id); 2544 if (token) { 2545 wpa_printf(MSG_DEBUG, "WPS: Found matching NFC " 2546 "Password Token"); 2547 dl_list_del(&token->list); 2548 wps->nfc_pw_token = token; 2549 2550 addr[0] = attr->public_key; 2551 sha256_vector(1, addr, &attr->public_key_len, hash); 2552 if (os_memcmp(hash, wps->nfc_pw_token->pubkey_hash, 2553 WPS_OOB_PUBKEY_HASH_LEN) != 0) { 2554 wpa_printf(MSG_ERROR, "WPS: Public Key hash " 2555 "mismatch"); 2556 return WPS_FAILURE; 2557 } 2558 } 2559 } 2560#endif /* CONFIG_WPS_NFC */ 2561 2562 if (wps->dev_pw_id == DEV_PW_PUSHBUTTON) { 2563 if ((wps->wps->registrar->force_pbc_overlap || 2564 wps_registrar_pbc_overlap(wps->wps->registrar, 2565 wps->mac_addr_e, wps->uuid_e) || 2566 !wps_registrar_p2p_dev_addr_match(wps)) && 2567 !wps_registrar_skip_overlap(wps)) { 2568 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - deny PBC " 2569 "negotiation"); 2570 wps->state = SEND_M2D; 2571 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2572 wps_pbc_overlap_event(wps->wps); 2573 wps_fail_event(wps->wps, WPS_M1, 2574 WPS_CFG_MULTIPLE_PBC_DETECTED, 2575 WPS_EI_NO_ERROR, wps->mac_addr_e); 2576 wps->wps->registrar->force_pbc_overlap = 1; 2577 return WPS_CONTINUE; 2578 } 2579 wps_registrar_add_pbc_session(wps->wps->registrar, 2580 wps->mac_addr_e, wps->uuid_e); 2581 wps->pbc = 1; 2582 } 2583 2584#ifdef WPS_WORKAROUNDS 2585 /* 2586 * It looks like Mac OS X 10.6.3 and 10.6.4 do not like Network Key in 2587 * passphrase format. To avoid interop issues, force PSK format to be 2588 * used. 2589 */ 2590 if (!wps->use_psk_key && 2591 wps->peer_dev.manufacturer && 2592 os_strncmp(wps->peer_dev.manufacturer, "Apple ", 6) == 0 && 2593 wps->peer_dev.model_name && 2594 os_strcmp(wps->peer_dev.model_name, "AirPort") == 0) { 2595 wpa_printf(MSG_DEBUG, "WPS: Workaround - Force Network Key in " 2596 "PSK format"); 2597 wps->use_psk_key = 1; 2598 } 2599#endif /* WPS_WORKAROUNDS */ 2600 2601 wps->state = SEND_M2; 2602 return WPS_CONTINUE; 2603} 2604 2605 2606static enum wps_process_res wps_process_m3(struct wps_data *wps, 2607 const struct wpabuf *msg, 2608 struct wps_parse_attr *attr) 2609{ 2610 wpa_printf(MSG_DEBUG, "WPS: Received M3"); 2611 2612 if (wps->state != RECV_M3) { 2613 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2614 "receiving M3", wps->state); 2615 wps->state = SEND_WSC_NACK; 2616 return WPS_CONTINUE; 2617 } 2618 2619 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2620 !wps_registrar_skip_overlap(wps)) { 2621 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2622 "session overlap"); 2623 wps->state = SEND_WSC_NACK; 2624 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2625 return WPS_CONTINUE; 2626 } 2627 2628 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2629 wps_process_authenticator(wps, attr->authenticator, msg) || 2630 wps_process_e_hash1(wps, attr->e_hash1) || 2631 wps_process_e_hash2(wps, attr->e_hash2)) { 2632 wps->state = SEND_WSC_NACK; 2633 return WPS_CONTINUE; 2634 } 2635 2636 wps->state = SEND_M4; 2637 return WPS_CONTINUE; 2638} 2639 2640 2641static enum wps_process_res wps_process_m5(struct wps_data *wps, 2642 const struct wpabuf *msg, 2643 struct wps_parse_attr *attr) 2644{ 2645 struct wpabuf *decrypted; 2646 struct wps_parse_attr eattr; 2647 2648 wpa_printf(MSG_DEBUG, "WPS: Received M5"); 2649 2650 if (wps->state != RECV_M5) { 2651 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2652 "receiving M5", wps->state); 2653 wps->state = SEND_WSC_NACK; 2654 return WPS_CONTINUE; 2655 } 2656 2657 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2658 !wps_registrar_skip_overlap(wps)) { 2659 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2660 "session overlap"); 2661 wps->state = SEND_WSC_NACK; 2662 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2663 return WPS_CONTINUE; 2664 } 2665 2666 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2667 wps_process_authenticator(wps, attr->authenticator, msg)) { 2668 wps->state = SEND_WSC_NACK; 2669 return WPS_CONTINUE; 2670 } 2671 2672 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings, 2673 attr->encr_settings_len); 2674 if (decrypted == NULL) { 2675 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted " 2676 "Settings attribute"); 2677 wps->state = SEND_WSC_NACK; 2678 return WPS_CONTINUE; 2679 } 2680 2681 if (wps_validate_m5_encr(decrypted, attr->version2 != NULL) < 0) { 2682 wpabuf_free(decrypted); 2683 wps->state = SEND_WSC_NACK; 2684 return WPS_CONTINUE; 2685 } 2686 2687 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings " 2688 "attribute"); 2689 if (wps_parse_msg(decrypted, &eattr) < 0 || 2690 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) || 2691 wps_process_e_snonce1(wps, eattr.e_snonce1)) { 2692 wpabuf_free(decrypted); 2693 wps->state = SEND_WSC_NACK; 2694 return WPS_CONTINUE; 2695 } 2696 wpabuf_free(decrypted); 2697 2698 wps->state = SEND_M6; 2699 return WPS_CONTINUE; 2700} 2701 2702 2703static void wps_sta_cred_cb(struct wps_data *wps) 2704{ 2705 /* 2706 * Update credential to only include a single authentication and 2707 * encryption type in case the AP configuration includes more than one 2708 * option. 2709 */ 2710 if (wps->cred.auth_type & WPS_AUTH_WPA2PSK) 2711 wps->cred.auth_type = WPS_AUTH_WPA2PSK; 2712 else if (wps->cred.auth_type & WPS_AUTH_WPAPSK) 2713 wps->cred.auth_type = WPS_AUTH_WPAPSK; 2714 if (wps->cred.encr_type & WPS_ENCR_AES) 2715 wps->cred.encr_type = WPS_ENCR_AES; 2716 else if (wps->cred.encr_type & WPS_ENCR_TKIP) 2717 wps->cred.encr_type = WPS_ENCR_TKIP; 2718 wpa_printf(MSG_DEBUG, "WPS: Update local configuration based on the " 2719 "AP configuration"); 2720 if (wps->wps->cred_cb) 2721 wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred); 2722} 2723 2724 2725static void wps_cred_update(struct wps_credential *dst, 2726 struct wps_credential *src) 2727{ 2728 os_memcpy(dst->ssid, src->ssid, sizeof(dst->ssid)); 2729 dst->ssid_len = src->ssid_len; 2730 dst->auth_type = src->auth_type; 2731 dst->encr_type = src->encr_type; 2732 dst->key_idx = src->key_idx; 2733 os_memcpy(dst->key, src->key, sizeof(dst->key)); 2734 dst->key_len = src->key_len; 2735} 2736 2737 2738static int wps_process_ap_settings_r(struct wps_data *wps, 2739 struct wps_parse_attr *attr) 2740{ 2741 struct wpabuf *msg; 2742 2743 if (wps->wps->ap || wps->er) 2744 return 0; 2745 2746 /* AP Settings Attributes in M7 when Enrollee is an AP */ 2747 if (wps_process_ap_settings(attr, &wps->cred) < 0) 2748 return -1; 2749 2750 wpa_printf(MSG_INFO, "WPS: Received old AP configuration from AP"); 2751 2752 if (wps->new_ap_settings) { 2753 wpa_printf(MSG_INFO, "WPS: Update AP configuration based on " 2754 "new settings"); 2755 wps_cred_update(&wps->cred, wps->new_ap_settings); 2756 return 0; 2757 } else { 2758 /* 2759 * Use the AP PIN only to receive the current AP settings, not 2760 * to reconfigure the AP. 2761 */ 2762 2763 /* 2764 * Clear selected registrar here since we do not get to 2765 * WSC_Done in this protocol run. 2766 */ 2767 wps_registrar_pin_completed(wps->wps->registrar); 2768 2769 msg = wps_build_ap_cred(wps); 2770 if (msg == NULL) 2771 return -1; 2772 wps->cred.cred_attr = wpabuf_head(msg); 2773 wps->cred.cred_attr_len = wpabuf_len(msg); 2774 2775 if (wps->ap_settings_cb) { 2776 wps->ap_settings_cb(wps->ap_settings_cb_ctx, 2777 &wps->cred); 2778 wpabuf_free(msg); 2779 return 1; 2780 } 2781 wps_sta_cred_cb(wps); 2782 2783 wps->cred.cred_attr = NULL; 2784 wps->cred.cred_attr_len = 0; 2785 wpabuf_free(msg); 2786 2787 return 1; 2788 } 2789} 2790 2791 2792static enum wps_process_res wps_process_m7(struct wps_data *wps, 2793 const struct wpabuf *msg, 2794 struct wps_parse_attr *attr) 2795{ 2796 struct wpabuf *decrypted; 2797 struct wps_parse_attr eattr; 2798 2799 wpa_printf(MSG_DEBUG, "WPS: Received M7"); 2800 2801 if (wps->state != RECV_M7) { 2802 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2803 "receiving M7", wps->state); 2804 wps->state = SEND_WSC_NACK; 2805 return WPS_CONTINUE; 2806 } 2807 2808 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2809 !wps_registrar_skip_overlap(wps)) { 2810 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2811 "session overlap"); 2812 wps->state = SEND_WSC_NACK; 2813 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2814 return WPS_CONTINUE; 2815 } 2816 2817 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2818 wps_process_authenticator(wps, attr->authenticator, msg)) { 2819 wps->state = SEND_WSC_NACK; 2820 return WPS_CONTINUE; 2821 } 2822 2823 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings, 2824 attr->encr_settings_len); 2825 if (decrypted == NULL) { 2826 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypt Encrypted " 2827 "Settings attribute"); 2828 wps->state = SEND_WSC_NACK; 2829 return WPS_CONTINUE; 2830 } 2831 2832 if (wps_validate_m7_encr(decrypted, wps->wps->ap || wps->er, 2833 attr->version2 != NULL) < 0) { 2834 wpabuf_free(decrypted); 2835 wps->state = SEND_WSC_NACK; 2836 return WPS_CONTINUE; 2837 } 2838 2839 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings " 2840 "attribute"); 2841 if (wps_parse_msg(decrypted, &eattr) < 0 || 2842 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) || 2843 wps_process_e_snonce2(wps, eattr.e_snonce2) || 2844 wps_process_ap_settings_r(wps, &eattr)) { 2845 wpabuf_free(decrypted); 2846 wps->state = SEND_WSC_NACK; 2847 return WPS_CONTINUE; 2848 } 2849 2850 wpabuf_free(decrypted); 2851 2852 wps->state = SEND_M8; 2853 return WPS_CONTINUE; 2854} 2855 2856 2857static enum wps_process_res wps_process_wsc_msg(struct wps_data *wps, 2858 const struct wpabuf *msg) 2859{ 2860 struct wps_parse_attr attr; 2861 enum wps_process_res ret = WPS_CONTINUE; 2862 2863 wpa_printf(MSG_DEBUG, "WPS: Received WSC_MSG"); 2864 2865 if (wps_parse_msg(msg, &attr) < 0) 2866 return WPS_FAILURE; 2867 2868 if (attr.msg_type == NULL) { 2869 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 2870 wps->state = SEND_WSC_NACK; 2871 return WPS_CONTINUE; 2872 } 2873 2874 if (*attr.msg_type != WPS_M1 && 2875 (attr.registrar_nonce == NULL || 2876 os_memcmp(wps->nonce_r, attr.registrar_nonce, 2877 WPS_NONCE_LEN) != 0)) { 2878 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 2879 return WPS_FAILURE; 2880 } 2881 2882 switch (*attr.msg_type) { 2883 case WPS_M1: 2884 if (wps_validate_m1(msg) < 0) 2885 return WPS_FAILURE; 2886#ifdef CONFIG_WPS_UPNP 2887 if (wps->wps->wps_upnp && attr.mac_addr) { 2888 /* Remove old pending messages when starting new run */ 2889 wps_free_pending_msgs(wps->wps->upnp_msgs); 2890 wps->wps->upnp_msgs = NULL; 2891 2892 upnp_wps_device_send_wlan_event( 2893 wps->wps->wps_upnp, attr.mac_addr, 2894 UPNP_WPS_WLANEVENT_TYPE_EAP, msg); 2895 } 2896#endif /* CONFIG_WPS_UPNP */ 2897 ret = wps_process_m1(wps, &attr); 2898 break; 2899 case WPS_M3: 2900 if (wps_validate_m3(msg) < 0) 2901 return WPS_FAILURE; 2902 ret = wps_process_m3(wps, msg, &attr); 2903 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 2904 wps_fail_event(wps->wps, WPS_M3, wps->config_error, 2905 wps->error_indication, wps->mac_addr_e); 2906 break; 2907 case WPS_M5: 2908 if (wps_validate_m5(msg) < 0) 2909 return WPS_FAILURE; 2910 ret = wps_process_m5(wps, msg, &attr); 2911 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 2912 wps_fail_event(wps->wps, WPS_M5, wps->config_error, 2913 wps->error_indication, wps->mac_addr_e); 2914 break; 2915 case WPS_M7: 2916 if (wps_validate_m7(msg) < 0) 2917 return WPS_FAILURE; 2918 ret = wps_process_m7(wps, msg, &attr); 2919 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 2920 wps_fail_event(wps->wps, WPS_M7, wps->config_error, 2921 wps->error_indication, wps->mac_addr_e); 2922 break; 2923 default: 2924 wpa_printf(MSG_DEBUG, "WPS: Unsupported Message Type %d", 2925 *attr.msg_type); 2926 return WPS_FAILURE; 2927 } 2928 2929 if (ret == WPS_CONTINUE) { 2930 /* Save a copy of the last message for Authenticator derivation 2931 */ 2932 wpabuf_free(wps->last_msg); 2933 wps->last_msg = wpabuf_dup(msg); 2934 } 2935 2936 return ret; 2937} 2938 2939 2940static enum wps_process_res wps_process_wsc_ack(struct wps_data *wps, 2941 const struct wpabuf *msg) 2942{ 2943 struct wps_parse_attr attr; 2944 2945 wpa_printf(MSG_DEBUG, "WPS: Received WSC_ACK"); 2946 2947 if (wps_parse_msg(msg, &attr) < 0) 2948 return WPS_FAILURE; 2949 2950 if (attr.msg_type == NULL) { 2951 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 2952 return WPS_FAILURE; 2953 } 2954 2955 if (*attr.msg_type != WPS_WSC_ACK) { 2956 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 2957 *attr.msg_type); 2958 return WPS_FAILURE; 2959 } 2960 2961#ifdef CONFIG_WPS_UPNP 2962 if (wps->wps->wps_upnp && wps->ext_reg && wps->state == RECV_M2D_ACK && 2963 upnp_wps_subscribers(wps->wps->wps_upnp)) { 2964 if (wps->wps->upnp_msgs) 2965 return WPS_CONTINUE; 2966 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an " 2967 "external Registrar"); 2968 return WPS_PENDING; 2969 } 2970#endif /* CONFIG_WPS_UPNP */ 2971 2972 if (attr.registrar_nonce == NULL || 2973 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 2974 { 2975 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 2976 return WPS_FAILURE; 2977 } 2978 2979 if (attr.enrollee_nonce == NULL || 2980 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 2981 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 2982 return WPS_FAILURE; 2983 } 2984 2985 if (wps->state == RECV_M2D_ACK) { 2986#ifdef CONFIG_WPS_UPNP 2987 if (wps->wps->wps_upnp && 2988 upnp_wps_subscribers(wps->wps->wps_upnp)) { 2989 if (wps->wps->upnp_msgs) 2990 return WPS_CONTINUE; 2991 if (wps->ext_reg == 0) 2992 wps->ext_reg = 1; 2993 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an " 2994 "external Registrar"); 2995 return WPS_PENDING; 2996 } 2997#endif /* CONFIG_WPS_UPNP */ 2998 2999 wpa_printf(MSG_DEBUG, "WPS: No more registrars available - " 3000 "terminate negotiation"); 3001 } 3002 3003 return WPS_FAILURE; 3004} 3005 3006 3007static enum wps_process_res wps_process_wsc_nack(struct wps_data *wps, 3008 const struct wpabuf *msg) 3009{ 3010 struct wps_parse_attr attr; 3011 int old_state; 3012 u16 config_error; 3013 3014 wpa_printf(MSG_DEBUG, "WPS: Received WSC_NACK"); 3015 3016 old_state = wps->state; 3017 wps->state = SEND_WSC_NACK; 3018 3019 if (wps_parse_msg(msg, &attr) < 0) 3020 return WPS_FAILURE; 3021 3022 if (attr.msg_type == NULL) { 3023 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3024 return WPS_FAILURE; 3025 } 3026 3027 if (*attr.msg_type != WPS_WSC_NACK) { 3028 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 3029 *attr.msg_type); 3030 return WPS_FAILURE; 3031 } 3032 3033#ifdef CONFIG_WPS_UPNP 3034 if (wps->wps->wps_upnp && wps->ext_reg) { 3035 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external " 3036 "Registrar terminated by the Enrollee"); 3037 return WPS_FAILURE; 3038 } 3039#endif /* CONFIG_WPS_UPNP */ 3040 3041 if (attr.registrar_nonce == NULL || 3042 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 3043 { 3044 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3045 return WPS_FAILURE; 3046 } 3047 3048 if (attr.enrollee_nonce == NULL || 3049 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 3050 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 3051 return WPS_FAILURE; 3052 } 3053 3054 if (attr.config_error == NULL) { 3055 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error attribute " 3056 "in WSC_NACK"); 3057 return WPS_FAILURE; 3058 } 3059 3060 config_error = WPA_GET_BE16(attr.config_error); 3061 wpa_printf(MSG_DEBUG, "WPS: Enrollee terminated negotiation with " 3062 "Configuration Error %d", config_error); 3063 3064 switch (old_state) { 3065 case RECV_M3: 3066 wps_fail_event(wps->wps, WPS_M2, config_error, 3067 wps->error_indication, wps->mac_addr_e); 3068 break; 3069 case RECV_M5: 3070 wps_fail_event(wps->wps, WPS_M4, config_error, 3071 wps->error_indication, wps->mac_addr_e); 3072 break; 3073 case RECV_M7: 3074 wps_fail_event(wps->wps, WPS_M6, config_error, 3075 wps->error_indication, wps->mac_addr_e); 3076 break; 3077 case RECV_DONE: 3078 wps_fail_event(wps->wps, WPS_M8, config_error, 3079 wps->error_indication, wps->mac_addr_e); 3080 break; 3081 default: 3082 break; 3083 } 3084 3085 return WPS_FAILURE; 3086} 3087 3088 3089static enum wps_process_res wps_process_wsc_done(struct wps_data *wps, 3090 const struct wpabuf *msg) 3091{ 3092 struct wps_parse_attr attr; 3093 3094 wpa_printf(MSG_DEBUG, "WPS: Received WSC_Done"); 3095 3096 if (wps->state != RECV_DONE && 3097 (!wps->wps->wps_upnp || !wps->ext_reg)) { 3098 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 3099 "receiving WSC_Done", wps->state); 3100 return WPS_FAILURE; 3101 } 3102 3103 if (wps_parse_msg(msg, &attr) < 0) 3104 return WPS_FAILURE; 3105 3106 if (attr.msg_type == NULL) { 3107 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3108 return WPS_FAILURE; 3109 } 3110 3111 if (*attr.msg_type != WPS_WSC_DONE) { 3112 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 3113 *attr.msg_type); 3114 return WPS_FAILURE; 3115 } 3116 3117#ifdef CONFIG_WPS_UPNP 3118 if (wps->wps->wps_upnp && wps->ext_reg) { 3119 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external " 3120 "Registrar completed successfully"); 3121 wps_device_store(wps->wps->registrar, &wps->peer_dev, 3122 wps->uuid_e); 3123 return WPS_DONE; 3124 } 3125#endif /* CONFIG_WPS_UPNP */ 3126 3127 if (attr.registrar_nonce == NULL || 3128 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 3129 { 3130 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3131 return WPS_FAILURE; 3132 } 3133 3134 if (attr.enrollee_nonce == NULL || 3135 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 3136 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 3137 return WPS_FAILURE; 3138 } 3139 3140 wpa_printf(MSG_DEBUG, "WPS: Negotiation completed successfully"); 3141 wps_device_store(wps->wps->registrar, &wps->peer_dev, 3142 wps->uuid_e); 3143 3144 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->new_psk && 3145 wps->wps->ap && !wps->wps->registrar->disable_auto_conf) { 3146 struct wps_credential cred; 3147 3148 wpa_printf(MSG_DEBUG, "WPS: Moving to Configured state based " 3149 "on first Enrollee connection"); 3150 3151 os_memset(&cred, 0, sizeof(cred)); 3152 os_memcpy(cred.ssid, wps->wps->ssid, wps->wps->ssid_len); 3153 cred.ssid_len = wps->wps->ssid_len; 3154 cred.auth_type = WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK; 3155 cred.encr_type = WPS_ENCR_TKIP | WPS_ENCR_AES; 3156 os_memcpy(cred.key, wps->new_psk, wps->new_psk_len); 3157 cred.key_len = wps->new_psk_len; 3158 3159 wps->wps->wps_state = WPS_STATE_CONFIGURED; 3160 wpa_hexdump_ascii_key(MSG_DEBUG, 3161 "WPS: Generated random passphrase", 3162 wps->new_psk, wps->new_psk_len); 3163 if (wps->wps->cred_cb) 3164 wps->wps->cred_cb(wps->wps->cb_ctx, &cred); 3165 3166 os_free(wps->new_psk); 3167 wps->new_psk = NULL; 3168 } 3169 3170 if (!wps->wps->ap && !wps->er) 3171 wps_sta_cred_cb(wps); 3172 3173 if (wps->new_psk) { 3174 if (wps_cb_new_psk(wps->wps->registrar, wps->mac_addr_e, 3175 wps->p2p_dev_addr, wps->new_psk, 3176 wps->new_psk_len)) { 3177 wpa_printf(MSG_DEBUG, "WPS: Failed to configure the " 3178 "new PSK"); 3179 } 3180 os_free(wps->new_psk); 3181 wps->new_psk = NULL; 3182 } 3183 3184 wps_cb_reg_success(wps->wps->registrar, wps->mac_addr_e, wps->uuid_e, 3185 wps->dev_password, wps->dev_password_len); 3186 3187 if (wps->pbc) { 3188 wps_registrar_remove_pbc_session(wps->wps->registrar, 3189 wps->uuid_e, 3190 wps->p2p_dev_addr); 3191 wps_registrar_pbc_completed(wps->wps->registrar); 3192 os_get_time(&wps->wps->registrar->pbc_ignore_start); 3193 os_memcpy(wps->wps->registrar->pbc_ignore_uuid, wps->uuid_e, 3194 WPS_UUID_LEN); 3195 } else { 3196 wps_registrar_pin_completed(wps->wps->registrar); 3197 } 3198 /* TODO: maintain AuthorizedMACs somewhere separately for each ER and 3199 * merge them into APs own list.. */ 3200 3201 wps_success_event(wps->wps, wps->mac_addr_e); 3202 3203 return WPS_DONE; 3204} 3205 3206 3207enum wps_process_res wps_registrar_process_msg(struct wps_data *wps, 3208 enum wsc_op_code op_code, 3209 const struct wpabuf *msg) 3210{ 3211 enum wps_process_res ret; 3212 3213 wpa_printf(MSG_DEBUG, "WPS: Processing received message (len=%lu " 3214 "op_code=%d)", 3215 (unsigned long) wpabuf_len(msg), op_code); 3216 3217#ifdef CONFIG_WPS_UPNP 3218 if (wps->wps->wps_upnp && op_code == WSC_MSG && wps->ext_reg == 1) { 3219 struct wps_parse_attr attr; 3220 if (wps_parse_msg(msg, &attr) == 0 && attr.msg_type && 3221 *attr.msg_type == WPS_M3) 3222 wps->ext_reg = 2; /* past M2/M2D phase */ 3223 } 3224 if (wps->ext_reg > 1) 3225 wps_registrar_free_pending_m2(wps->wps); 3226 if (wps->wps->wps_upnp && wps->ext_reg && 3227 wps->wps->upnp_msgs == NULL && 3228 (op_code == WSC_MSG || op_code == WSC_Done || op_code == WSC_NACK)) 3229 { 3230 struct wps_parse_attr attr; 3231 int type; 3232 if (wps_parse_msg(msg, &attr) < 0 || attr.msg_type == NULL) 3233 type = -1; 3234 else 3235 type = *attr.msg_type; 3236 wpa_printf(MSG_DEBUG, "WPS: Sending received message (type %d)" 3237 " to external Registrar for processing", type); 3238 upnp_wps_device_send_wlan_event(wps->wps->wps_upnp, 3239 wps->mac_addr_e, 3240 UPNP_WPS_WLANEVENT_TYPE_EAP, 3241 msg); 3242 if (op_code == WSC_MSG) 3243 return WPS_PENDING; 3244 } else if (wps->wps->wps_upnp && wps->ext_reg && op_code == WSC_MSG) { 3245 wpa_printf(MSG_DEBUG, "WPS: Skip internal processing - using " 3246 "external Registrar"); 3247 return WPS_CONTINUE; 3248 } 3249#endif /* CONFIG_WPS_UPNP */ 3250 3251 switch (op_code) { 3252 case WSC_MSG: 3253 return wps_process_wsc_msg(wps, msg); 3254 case WSC_ACK: 3255 if (wps_validate_wsc_ack(msg) < 0) 3256 return WPS_FAILURE; 3257 return wps_process_wsc_ack(wps, msg); 3258 case WSC_NACK: 3259 if (wps_validate_wsc_nack(msg) < 0) 3260 return WPS_FAILURE; 3261 return wps_process_wsc_nack(wps, msg); 3262 case WSC_Done: 3263 if (wps_validate_wsc_done(msg) < 0) 3264 return WPS_FAILURE; 3265 ret = wps_process_wsc_done(wps, msg); 3266 if (ret == WPS_FAILURE) { 3267 wps->state = SEND_WSC_NACK; 3268 wps_fail_event(wps->wps, WPS_WSC_DONE, 3269 wps->config_error, 3270 wps->error_indication, wps->mac_addr_e); 3271 } 3272 return ret; 3273 default: 3274 wpa_printf(MSG_DEBUG, "WPS: Unsupported op_code %d", op_code); 3275 return WPS_FAILURE; 3276 } 3277} 3278 3279 3280int wps_registrar_update_ie(struct wps_registrar *reg) 3281{ 3282 return wps_set_ie(reg); 3283} 3284 3285 3286static void wps_registrar_set_selected_timeout(void *eloop_ctx, 3287 void *timeout_ctx) 3288{ 3289 struct wps_registrar *reg = eloop_ctx; 3290 3291 wpa_printf(MSG_DEBUG, "WPS: Selected Registrar timeout - " 3292 "unselect internal Registrar"); 3293 reg->selected_registrar = 0; 3294 reg->pbc = 0; 3295 wps_registrar_selected_registrar_changed(reg, 0); 3296} 3297 3298 3299#ifdef CONFIG_WPS_UPNP 3300static void wps_registrar_sel_reg_add(struct wps_registrar *reg, 3301 struct subscription *s) 3302{ 3303 int i, j; 3304 wpa_printf(MSG_DEBUG, "WPS: External Registrar selected (dev_pw_id=%d " 3305 "config_methods=0x%x)", 3306 s->dev_password_id, s->config_methods); 3307 reg->sel_reg_union = 1; 3308 if (reg->sel_reg_dev_password_id_override != DEV_PW_PUSHBUTTON) 3309 reg->sel_reg_dev_password_id_override = s->dev_password_id; 3310 if (reg->sel_reg_config_methods_override == -1) 3311 reg->sel_reg_config_methods_override = 0; 3312 reg->sel_reg_config_methods_override |= s->config_methods; 3313 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) 3314 if (is_zero_ether_addr(reg->authorized_macs_union[i])) 3315 break; 3316 for (j = 0; i < WPS_MAX_AUTHORIZED_MACS && j < WPS_MAX_AUTHORIZED_MACS; 3317 j++) { 3318 if (is_zero_ether_addr(s->authorized_macs[j])) 3319 break; 3320 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC into union: " 3321 MACSTR, MAC2STR(s->authorized_macs[j])); 3322 os_memcpy(reg->authorized_macs_union[i], 3323 s->authorized_macs[j], ETH_ALEN); 3324 i++; 3325 } 3326 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union", 3327 (u8 *) reg->authorized_macs_union, 3328 sizeof(reg->authorized_macs_union)); 3329} 3330#endif /* CONFIG_WPS_UPNP */ 3331 3332 3333static void wps_registrar_sel_reg_union(struct wps_registrar *reg) 3334{ 3335#ifdef CONFIG_WPS_UPNP 3336 struct subscription *s; 3337 3338 if (reg->wps->wps_upnp == NULL) 3339 return; 3340 3341 dl_list_for_each(s, ®->wps->wps_upnp->subscriptions, 3342 struct subscription, list) { 3343 struct subscr_addr *sa; 3344 sa = dl_list_first(&s->addr_list, struct subscr_addr, list); 3345 if (sa) { 3346 wpa_printf(MSG_DEBUG, "WPS: External Registrar %s:%d", 3347 inet_ntoa(sa->saddr.sin_addr), 3348 ntohs(sa->saddr.sin_port)); 3349 } 3350 if (s->selected_registrar) 3351 wps_registrar_sel_reg_add(reg, s); 3352 else 3353 wpa_printf(MSG_DEBUG, "WPS: External Registrar not " 3354 "selected"); 3355 } 3356#endif /* CONFIG_WPS_UPNP */ 3357} 3358 3359 3360/** 3361 * wps_registrar_selected_registrar_changed - SetSelectedRegistrar change 3362 * @reg: Registrar data from wps_registrar_init() 3363 * 3364 * This function is called when selected registrar state changes, e.g., when an 3365 * AP receives a SetSelectedRegistrar UPnP message. 3366 */ 3367void wps_registrar_selected_registrar_changed(struct wps_registrar *reg, 3368 u16 dev_pw_id) 3369{ 3370 wpa_printf(MSG_DEBUG, "WPS: Selected registrar information changed"); 3371 3372 reg->sel_reg_union = reg->selected_registrar; 3373 reg->sel_reg_dev_password_id_override = -1; 3374 reg->sel_reg_config_methods_override = -1; 3375 os_memcpy(reg->authorized_macs_union, reg->authorized_macs, 3376 WPS_MAX_AUTHORIZED_MACS * ETH_ALEN); 3377 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union (start with own)", 3378 (u8 *) reg->authorized_macs_union, 3379 sizeof(reg->authorized_macs_union)); 3380 if (reg->selected_registrar) { 3381 u16 methods; 3382 3383 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 3384#ifdef CONFIG_WPS2 3385 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 3386 WPS_CONFIG_PHY_PUSHBUTTON); 3387#endif /* CONFIG_WPS2 */ 3388 if (reg->pbc) { 3389 reg->sel_reg_dev_password_id_override = 3390 DEV_PW_PUSHBUTTON; 3391 wps_set_pushbutton(&methods, reg->wps->config_methods); 3392 } else if (dev_pw_id) 3393 reg->sel_reg_dev_password_id_override = dev_pw_id; 3394 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar selected " 3395 "(pbc=%d)", reg->pbc); 3396 reg->sel_reg_config_methods_override = methods; 3397 } else 3398 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar not selected"); 3399 3400 wps_registrar_sel_reg_union(reg); 3401 3402 wps_set_ie(reg); 3403 wps_cb_set_sel_reg(reg); 3404} 3405 3406 3407int wps_registrar_get_info(struct wps_registrar *reg, const u8 *addr, 3408 char *buf, size_t buflen) 3409{ 3410 struct wps_registrar_device *d; 3411 int len = 0, ret; 3412 char uuid[40]; 3413 char devtype[WPS_DEV_TYPE_BUFSIZE]; 3414 3415 d = wps_device_get(reg, addr); 3416 if (d == NULL) 3417 return 0; 3418 if (uuid_bin2str(d->uuid, uuid, sizeof(uuid))) 3419 return 0; 3420 3421 ret = os_snprintf(buf + len, buflen - len, 3422 "wpsUuid=%s\n" 3423 "wpsPrimaryDeviceType=%s\n" 3424 "wpsDeviceName=%s\n" 3425 "wpsManufacturer=%s\n" 3426 "wpsModelName=%s\n" 3427 "wpsModelNumber=%s\n" 3428 "wpsSerialNumber=%s\n", 3429 uuid, 3430 wps_dev_type_bin2str(d->dev.pri_dev_type, devtype, 3431 sizeof(devtype)), 3432 d->dev.device_name ? d->dev.device_name : "", 3433 d->dev.manufacturer ? d->dev.manufacturer : "", 3434 d->dev.model_name ? d->dev.model_name : "", 3435 d->dev.model_number ? d->dev.model_number : "", 3436 d->dev.serial_number ? d->dev.serial_number : ""); 3437 if (ret < 0 || (size_t) ret >= buflen - len) 3438 return len; 3439 len += ret; 3440 3441 return len; 3442} 3443 3444 3445int wps_registrar_config_ap(struct wps_registrar *reg, 3446 struct wps_credential *cred) 3447{ 3448#ifdef CONFIG_WPS2 3449 printf("encr_type=0x%x\n", cred->encr_type); 3450 if (!(cred->encr_type & (WPS_ENCR_NONE | WPS_ENCR_TKIP | 3451 WPS_ENCR_AES))) { 3452 if (cred->encr_type & WPS_ENCR_WEP) { 3453 wpa_printf(MSG_INFO, "WPS: Reject new AP settings " 3454 "due to WEP configuration"); 3455 return -1; 3456 } 3457 3458 wpa_printf(MSG_INFO, "WPS: Reject new AP settings due to " 3459 "invalid encr_type 0x%x", cred->encr_type); 3460 return -1; 3461 } 3462 3463 if ((cred->encr_type & (WPS_ENCR_TKIP | WPS_ENCR_AES)) == 3464 WPS_ENCR_TKIP) { 3465 wpa_printf(MSG_DEBUG, "WPS: Upgrade encr_type TKIP -> " 3466 "TKIP+AES"); 3467 cred->encr_type |= WPS_ENCR_AES; 3468 } 3469 3470 if ((cred->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) == 3471 WPS_AUTH_WPAPSK) { 3472 wpa_printf(MSG_DEBUG, "WPS: Upgrade auth_type WPAPSK -> " 3473 "WPAPSK+WPA2PSK"); 3474 cred->auth_type |= WPS_AUTH_WPA2PSK; 3475 } 3476#endif /* CONFIG_WPS2 */ 3477 3478 if (reg->wps->cred_cb) 3479 return reg->wps->cred_cb(reg->wps->cb_ctx, cred); 3480 3481 return -1; 3482} 3483 3484 3485#ifdef CONFIG_WPS_NFC 3486 3487int wps_registrar_add_nfc_pw_token(struct wps_registrar *reg, 3488 const u8 *pubkey_hash, u16 pw_id, 3489 const u8 *dev_pw, size_t dev_pw_len) 3490{ 3491 struct wps_nfc_pw_token *token; 3492 3493 if (dev_pw_len > WPS_OOB_DEVICE_PASSWORD_LEN) 3494 return -1; 3495 3496 wps_free_nfc_pw_tokens(®->nfc_pw_tokens, pw_id); 3497 3498 token = os_zalloc(sizeof(*token)); 3499 if (token == NULL) 3500 return -1; 3501 3502 os_memcpy(token->pubkey_hash, pubkey_hash, WPS_OOB_PUBKEY_HASH_LEN); 3503 token->pw_id = pw_id; 3504 wpa_snprintf_hex_uppercase((char *) token->dev_pw, 3505 sizeof(token->dev_pw), 3506 dev_pw, dev_pw_len); 3507 token->dev_pw_len = dev_pw_len * 2; 3508 3509 dl_list_add(®->nfc_pw_tokens, &token->list); 3510 3511 reg->selected_registrar = 1; 3512 reg->pbc = 0; 3513 wps_registrar_add_authorized_mac(reg, 3514 (u8 *) "\xff\xff\xff\xff\xff\xff"); 3515 wps_registrar_selected_registrar_changed(reg, pw_id); 3516 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 3517 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, 3518 wps_registrar_set_selected_timeout, 3519 reg, NULL); 3520 3521 wpa_printf(MSG_DEBUG, "WPS: Added NFC Device Password %u to Registrar", 3522 pw_id); 3523 3524 return 0; 3525} 3526 3527 3528int wps_registrar_add_nfc_password_token(struct wps_registrar *reg, 3529 const u8 *oob_dev_pw, 3530 size_t oob_dev_pw_len) 3531{ 3532 const u8 *pos, *hash, *dev_pw; 3533 u16 id; 3534 size_t dev_pw_len; 3535 3536 if (oob_dev_pw_len < WPS_OOB_PUBKEY_HASH_LEN + 2 + 3537 WPS_OOB_DEVICE_PASSWORD_MIN_LEN || 3538 oob_dev_pw_len > WPS_OOB_PUBKEY_HASH_LEN + 2 + 3539 WPS_OOB_DEVICE_PASSWORD_LEN) 3540 return -1; 3541 3542 hash = oob_dev_pw; 3543 pos = oob_dev_pw + WPS_OOB_PUBKEY_HASH_LEN; 3544 id = WPA_GET_BE16(pos); 3545 dev_pw = pos + 2; 3546 dev_pw_len = oob_dev_pw + oob_dev_pw_len - dev_pw; 3547 3548 wpa_printf(MSG_DEBUG, "WPS: Add NFC Password Token for Password ID %u", 3549 id); 3550 3551 wpa_hexdump(MSG_DEBUG, "WPS: Public Key Hash", 3552 hash, WPS_OOB_PUBKEY_HASH_LEN); 3553 wpa_hexdump_key(MSG_DEBUG, "WPS: Device Password", dev_pw, dev_pw_len); 3554 3555 return wps_registrar_add_nfc_pw_token(reg, hash, id, dev_pw, 3556 dev_pw_len); 3557} 3558 3559 3560void wps_registrar_remove_nfc_pw_token(struct wps_registrar *reg, 3561 struct wps_nfc_pw_token *token) 3562{ 3563 wps_registrar_remove_authorized_mac(reg, 3564 (u8 *) "\xff\xff\xff\xff\xff\xff"); 3565 wps_registrar_selected_registrar_changed(reg, 0); 3566} 3567 3568#endif /* CONFIG_WPS_NFC */ 3569