wps_registrar.c revision f86232838cf712377867cb42417c1613ab5dc425
1/* 2 * Wi-Fi Protected Setup - Registrar 3 * Copyright (c) 2008-2012, Jouni Malinen <j@w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9#include "utils/includes.h" 10 11#include "utils/common.h" 12#include "utils/base64.h" 13#include "utils/eloop.h" 14#include "utils/uuid.h" 15#include "utils/list.h" 16#include "crypto/crypto.h" 17#include "crypto/sha256.h" 18#include "crypto/random.h" 19#include "common/ieee802_11_defs.h" 20#include "wps_i.h" 21#include "wps_dev_attr.h" 22#include "wps_upnp.h" 23#include "wps_upnp_i.h" 24 25#ifndef CONFIG_WPS_STRICT 26#define WPS_WORKAROUNDS 27#endif /* CONFIG_WPS_STRICT */ 28 29#ifdef CONFIG_WPS_NFC 30 31struct wps_nfc_pw_token { 32 struct dl_list list; 33 u8 pubkey_hash[WPS_OOB_PUBKEY_HASH_LEN]; 34 u16 pw_id; 35 u8 dev_pw[WPS_OOB_DEVICE_PASSWORD_LEN]; 36 size_t dev_pw_len; 37}; 38 39 40static void wps_remove_nfc_pw_token(struct wps_nfc_pw_token *token) 41{ 42 dl_list_del(&token->list); 43 os_free(token); 44} 45 46 47static void wps_free_nfc_pw_tokens(struct dl_list *tokens, u16 pw_id) 48{ 49 struct wps_nfc_pw_token *token, *prev; 50 dl_list_for_each_safe(token, prev, tokens, struct wps_nfc_pw_token, 51 list) { 52 if (pw_id == 0 || pw_id == token->pw_id) 53 wps_remove_nfc_pw_token(token); 54 } 55} 56 57 58static struct wps_nfc_pw_token * wps_get_nfc_pw_token(struct dl_list *tokens, 59 u16 pw_id) 60{ 61 struct wps_nfc_pw_token *token; 62 dl_list_for_each(token, tokens, struct wps_nfc_pw_token, list) { 63 if (pw_id == token->pw_id) 64 return token; 65 } 66 return NULL; 67} 68 69#else /* CONFIG_WPS_NFC */ 70 71#define wps_free_nfc_pw_tokens(t, p) do { } while (0) 72 73#endif /* CONFIG_WPS_NFC */ 74 75 76struct wps_uuid_pin { 77 struct dl_list list; 78 u8 uuid[WPS_UUID_LEN]; 79 int wildcard_uuid; 80 u8 *pin; 81 size_t pin_len; 82#define PIN_LOCKED BIT(0) 83#define PIN_EXPIRES BIT(1) 84 int flags; 85 struct os_time expiration; 86 u8 enrollee_addr[ETH_ALEN]; 87}; 88 89 90static void wps_free_pin(struct wps_uuid_pin *pin) 91{ 92 os_free(pin->pin); 93 os_free(pin); 94} 95 96 97static void wps_remove_pin(struct wps_uuid_pin *pin) 98{ 99 dl_list_del(&pin->list); 100 wps_free_pin(pin); 101} 102 103 104static void wps_free_pins(struct dl_list *pins) 105{ 106 struct wps_uuid_pin *pin, *prev; 107 dl_list_for_each_safe(pin, prev, pins, struct wps_uuid_pin, list) 108 wps_remove_pin(pin); 109} 110 111 112struct wps_pbc_session { 113 struct wps_pbc_session *next; 114 u8 addr[ETH_ALEN]; 115 u8 uuid_e[WPS_UUID_LEN]; 116 struct os_time timestamp; 117}; 118 119 120static void wps_free_pbc_sessions(struct wps_pbc_session *pbc) 121{ 122 struct wps_pbc_session *prev; 123 124 while (pbc) { 125 prev = pbc; 126 pbc = pbc->next; 127 os_free(prev); 128 } 129} 130 131 132struct wps_registrar_device { 133 struct wps_registrar_device *next; 134 struct wps_device_data dev; 135 u8 uuid[WPS_UUID_LEN]; 136}; 137 138 139struct wps_registrar { 140 struct wps_context *wps; 141 142 int pbc; 143 int selected_registrar; 144 145 int (*new_psk_cb)(void *ctx, const u8 *mac_addr, const u8 *psk, 146 size_t psk_len); 147 int (*set_ie_cb)(void *ctx, struct wpabuf *beacon_ie, 148 struct wpabuf *probe_resp_ie); 149 void (*pin_needed_cb)(void *ctx, const u8 *uuid_e, 150 const struct wps_device_data *dev); 151 void (*reg_success_cb)(void *ctx, const u8 *mac_addr, 152 const u8 *uuid_e, const u8 *dev_pw, 153 size_t dev_pw_len); 154 void (*set_sel_reg_cb)(void *ctx, int sel_reg, u16 dev_passwd_id, 155 u16 sel_reg_config_methods); 156 void (*enrollee_seen_cb)(void *ctx, const u8 *addr, const u8 *uuid_e, 157 const u8 *pri_dev_type, u16 config_methods, 158 u16 dev_password_id, u8 request_type, 159 const char *dev_name); 160 void *cb_ctx; 161 162 struct dl_list pins; 163 struct dl_list nfc_pw_tokens; 164 struct wps_pbc_session *pbc_sessions; 165 166 int skip_cred_build; 167 struct wpabuf *extra_cred; 168 int disable_auto_conf; 169 int sel_reg_union; 170 int sel_reg_dev_password_id_override; 171 int sel_reg_config_methods_override; 172 int static_wep_only; 173 int dualband; 174 175 struct wps_registrar_device *devices; 176 177 int force_pbc_overlap; 178 179 u8 authorized_macs[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN]; 180 u8 authorized_macs_union[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN]; 181 182 u8 p2p_dev_addr[ETH_ALEN]; 183 184 u8 pbc_ignore_uuid[WPS_UUID_LEN]; 185 struct os_time pbc_ignore_start; 186}; 187 188 189static int wps_set_ie(struct wps_registrar *reg); 190static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx); 191static void wps_registrar_set_selected_timeout(void *eloop_ctx, 192 void *timeout_ctx); 193static void wps_registrar_remove_pin(struct wps_registrar *reg, 194 struct wps_uuid_pin *pin); 195 196 197static void wps_registrar_add_authorized_mac(struct wps_registrar *reg, 198 const u8 *addr) 199{ 200 int i; 201 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC " MACSTR, 202 MAC2STR(addr)); 203 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) 204 if (os_memcmp(reg->authorized_macs[i], addr, ETH_ALEN) == 0) { 205 wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was " 206 "already in the list"); 207 return; /* already in list */ 208 } 209 for (i = WPS_MAX_AUTHORIZED_MACS - 1; i > 0; i--) 210 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i - 1], 211 ETH_ALEN); 212 os_memcpy(reg->authorized_macs[0], addr, ETH_ALEN); 213 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs", 214 (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs)); 215} 216 217 218static void wps_registrar_remove_authorized_mac(struct wps_registrar *reg, 219 const u8 *addr) 220{ 221 int i; 222 wpa_printf(MSG_DEBUG, "WPS: Remove authorized MAC " MACSTR, 223 MAC2STR(addr)); 224 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) { 225 if (os_memcmp(reg->authorized_macs, addr, ETH_ALEN) == 0) 226 break; 227 } 228 if (i == WPS_MAX_AUTHORIZED_MACS) { 229 wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was not in the " 230 "list"); 231 return; /* not in the list */ 232 } 233 for (; i + 1 < WPS_MAX_AUTHORIZED_MACS; i++) 234 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i + 1], 235 ETH_ALEN); 236 os_memset(reg->authorized_macs[WPS_MAX_AUTHORIZED_MACS - 1], 0, 237 ETH_ALEN); 238 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs", 239 (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs)); 240} 241 242 243static void wps_free_devices(struct wps_registrar_device *dev) 244{ 245 struct wps_registrar_device *prev; 246 247 while (dev) { 248 prev = dev; 249 dev = dev->next; 250 wps_device_data_free(&prev->dev); 251 os_free(prev); 252 } 253} 254 255 256static struct wps_registrar_device * wps_device_get(struct wps_registrar *reg, 257 const u8 *addr) 258{ 259 struct wps_registrar_device *dev; 260 261 for (dev = reg->devices; dev; dev = dev->next) { 262 if (os_memcmp(dev->dev.mac_addr, addr, ETH_ALEN) == 0) 263 return dev; 264 } 265 return NULL; 266} 267 268 269static void wps_device_clone_data(struct wps_device_data *dst, 270 struct wps_device_data *src) 271{ 272 os_memcpy(dst->mac_addr, src->mac_addr, ETH_ALEN); 273 os_memcpy(dst->pri_dev_type, src->pri_dev_type, WPS_DEV_TYPE_LEN); 274 275#define WPS_STRDUP(n) \ 276 os_free(dst->n); \ 277 dst->n = src->n ? os_strdup(src->n) : NULL 278 279 WPS_STRDUP(device_name); 280 WPS_STRDUP(manufacturer); 281 WPS_STRDUP(model_name); 282 WPS_STRDUP(model_number); 283 WPS_STRDUP(serial_number); 284#undef WPS_STRDUP 285} 286 287 288int wps_device_store(struct wps_registrar *reg, 289 struct wps_device_data *dev, const u8 *uuid) 290{ 291 struct wps_registrar_device *d; 292 293 d = wps_device_get(reg, dev->mac_addr); 294 if (d == NULL) { 295 d = os_zalloc(sizeof(*d)); 296 if (d == NULL) 297 return -1; 298 d->next = reg->devices; 299 reg->devices = d; 300 } 301 302 wps_device_clone_data(&d->dev, dev); 303 os_memcpy(d->uuid, uuid, WPS_UUID_LEN); 304 305 return 0; 306} 307 308 309static void wps_registrar_add_pbc_session(struct wps_registrar *reg, 310 const u8 *addr, const u8 *uuid_e) 311{ 312 struct wps_pbc_session *pbc, *prev = NULL; 313 struct os_time now; 314 315 os_get_time(&now); 316 317 pbc = reg->pbc_sessions; 318 while (pbc) { 319 if (os_memcmp(pbc->addr, addr, ETH_ALEN) == 0 && 320 os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0) { 321 if (prev) 322 prev->next = pbc->next; 323 else 324 reg->pbc_sessions = pbc->next; 325 break; 326 } 327 prev = pbc; 328 pbc = pbc->next; 329 } 330 331 if (!pbc) { 332 pbc = os_zalloc(sizeof(*pbc)); 333 if (pbc == NULL) 334 return; 335 os_memcpy(pbc->addr, addr, ETH_ALEN); 336 if (uuid_e) 337 os_memcpy(pbc->uuid_e, uuid_e, WPS_UUID_LEN); 338 } 339 340 pbc->next = reg->pbc_sessions; 341 reg->pbc_sessions = pbc; 342 pbc->timestamp = now; 343 344 /* remove entries that have timed out */ 345 prev = pbc; 346 pbc = pbc->next; 347 348 while (pbc) { 349 if (now.sec > pbc->timestamp.sec + WPS_PBC_WALK_TIME) { 350 prev->next = NULL; 351 wps_free_pbc_sessions(pbc); 352 break; 353 } 354 prev = pbc; 355 pbc = pbc->next; 356 } 357} 358 359 360static void wps_registrar_remove_pbc_session(struct wps_registrar *reg, 361 const u8 *uuid_e, 362 const u8 *p2p_dev_addr) 363{ 364 struct wps_pbc_session *pbc, *prev = NULL, *tmp; 365 366 pbc = reg->pbc_sessions; 367 while (pbc) { 368 if (os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0 || 369#ifdef ANDROID_P2P 370 (p2p_dev_addr && !is_zero_ether_addr(pbc->addr) && 371 os_memcmp(pbc->addr, p2p_dev_addr, ETH_ALEN) == 372#else 373 (p2p_dev_addr && !is_zero_ether_addr(reg->p2p_dev_addr) && 374 os_memcmp(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN) == 375#endif 376 0)) { 377 if (prev) 378 prev->next = pbc->next; 379 else 380 reg->pbc_sessions = pbc->next; 381 tmp = pbc; 382 pbc = pbc->next; 383 wpa_printf(MSG_DEBUG, "WPS: Removing PBC session for " 384 "addr=" MACSTR, MAC2STR(tmp->addr)); 385 wpa_hexdump(MSG_DEBUG, "WPS: Removed UUID-E", 386 tmp->uuid_e, WPS_UUID_LEN); 387 os_free(tmp); 388 continue; 389 } 390 prev = pbc; 391 pbc = pbc->next; 392 } 393} 394 395 396int wps_registrar_pbc_overlap(struct wps_registrar *reg, 397 const u8 *addr, const u8 *uuid_e) 398{ 399 int count = 0; 400 struct wps_pbc_session *pbc; 401 struct wps_pbc_session *first = NULL; 402 struct os_time now; 403 404 os_get_time(&now); 405 406 wpa_printf(MSG_DEBUG, "WPS: Checking active PBC sessions for overlap"); 407 408 if (uuid_e) { 409 wpa_printf(MSG_DEBUG, "WPS: Add one for the requested UUID"); 410 wpa_hexdump(MSG_DEBUG, "WPS: Requested UUID", 411 uuid_e, WPS_UUID_LEN); 412 count++; 413 } 414 415 for (pbc = reg->pbc_sessions; pbc; pbc = pbc->next) { 416 wpa_printf(MSG_DEBUG, "WPS: Consider PBC session with " MACSTR, 417 MAC2STR(pbc->addr)); 418 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", 419 pbc->uuid_e, WPS_UUID_LEN); 420 if (now.sec > pbc->timestamp.sec + WPS_PBC_WALK_TIME) { 421 wpa_printf(MSG_DEBUG, "WPS: PBC walk time has " 422 "expired"); 423 break; 424 } 425 if (first && 426 os_memcmp(pbc->uuid_e, first->uuid_e, WPS_UUID_LEN) == 0) { 427 wpa_printf(MSG_DEBUG, "WPS: Same Enrollee"); 428 continue; /* same Enrollee */ 429 } 430 if (uuid_e == NULL || 431 os_memcmp(uuid_e, pbc->uuid_e, WPS_UUID_LEN)) { 432 wpa_printf(MSG_DEBUG, "WPS: New Enrollee"); 433 count++; 434 } 435 if (first == NULL) 436 first = pbc; 437 } 438 439 wpa_printf(MSG_DEBUG, "WPS: %u active PBC session(s) found", count); 440 441 return count > 1 ? 1 : 0; 442} 443 444 445static int wps_build_wps_state(struct wps_context *wps, struct wpabuf *msg) 446{ 447 wpa_printf(MSG_DEBUG, "WPS: * Wi-Fi Protected Setup State (%d)", 448 wps->wps_state); 449 wpabuf_put_be16(msg, ATTR_WPS_STATE); 450 wpabuf_put_be16(msg, 1); 451 wpabuf_put_u8(msg, wps->wps_state); 452 return 0; 453} 454 455 456#ifdef CONFIG_WPS_UPNP 457static void wps_registrar_free_pending_m2(struct wps_context *wps) 458{ 459 struct upnp_pending_message *p, *p2, *prev = NULL; 460 p = wps->upnp_msgs; 461 while (p) { 462 if (p->type == WPS_M2 || p->type == WPS_M2D) { 463 if (prev == NULL) 464 wps->upnp_msgs = p->next; 465 else 466 prev->next = p->next; 467 wpa_printf(MSG_DEBUG, "WPS UPnP: Drop pending M2/M2D"); 468 p2 = p; 469 p = p->next; 470 wpabuf_free(p2->msg); 471 os_free(p2); 472 continue; 473 } 474 prev = p; 475 p = p->next; 476 } 477} 478#endif /* CONFIG_WPS_UPNP */ 479 480 481static int wps_build_ap_setup_locked(struct wps_context *wps, 482 struct wpabuf *msg) 483{ 484 if (wps->ap_setup_locked && wps->ap_setup_locked != 2) { 485 wpa_printf(MSG_DEBUG, "WPS: * AP Setup Locked"); 486 wpabuf_put_be16(msg, ATTR_AP_SETUP_LOCKED); 487 wpabuf_put_be16(msg, 1); 488 wpabuf_put_u8(msg, 1); 489 } 490 return 0; 491} 492 493 494static int wps_build_selected_registrar(struct wps_registrar *reg, 495 struct wpabuf *msg) 496{ 497 if (!reg->sel_reg_union) 498 return 0; 499 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar"); 500 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR); 501 wpabuf_put_be16(msg, 1); 502 wpabuf_put_u8(msg, 1); 503 return 0; 504} 505 506 507static int wps_build_sel_reg_dev_password_id(struct wps_registrar *reg, 508 struct wpabuf *msg) 509{ 510 u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT; 511 if (!reg->sel_reg_union) 512 return 0; 513 if (reg->sel_reg_dev_password_id_override >= 0) 514 id = reg->sel_reg_dev_password_id_override; 515 wpa_printf(MSG_DEBUG, "WPS: * Device Password ID (%d)", id); 516 wpabuf_put_be16(msg, ATTR_DEV_PASSWORD_ID); 517 wpabuf_put_be16(msg, 2); 518 wpabuf_put_be16(msg, id); 519 return 0; 520} 521 522 523static int wps_build_sel_pbc_reg_uuid_e(struct wps_registrar *reg, 524 struct wpabuf *msg) 525{ 526 u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT; 527 if (!reg->sel_reg_union) 528 return 0; 529 if (reg->sel_reg_dev_password_id_override >= 0) 530 id = reg->sel_reg_dev_password_id_override; 531 if (id != DEV_PW_PUSHBUTTON || !reg->dualband) 532 return 0; 533 return wps_build_uuid_e(msg, reg->wps->uuid); 534} 535 536 537static void wps_set_pushbutton(u16 *methods, u16 conf_methods) 538{ 539 *methods |= WPS_CONFIG_PUSHBUTTON; 540#ifdef CONFIG_WPS2 541 if ((conf_methods & WPS_CONFIG_VIRT_PUSHBUTTON) == 542 WPS_CONFIG_VIRT_PUSHBUTTON) 543 *methods |= WPS_CONFIG_VIRT_PUSHBUTTON; 544 if ((conf_methods & WPS_CONFIG_PHY_PUSHBUTTON) == 545 WPS_CONFIG_PHY_PUSHBUTTON) 546 *methods |= WPS_CONFIG_PHY_PUSHBUTTON; 547 if ((*methods & WPS_CONFIG_VIRT_PUSHBUTTON) != 548 WPS_CONFIG_VIRT_PUSHBUTTON && 549 (*methods & WPS_CONFIG_PHY_PUSHBUTTON) != 550 WPS_CONFIG_PHY_PUSHBUTTON) { 551 /* 552 * Required to include virtual/physical flag, but we were not 553 * configured with push button type, so have to default to one 554 * of them. 555 */ 556 *methods |= WPS_CONFIG_PHY_PUSHBUTTON; 557 } 558#endif /* CONFIG_WPS2 */ 559} 560 561 562static int wps_build_sel_reg_config_methods(struct wps_registrar *reg, 563 struct wpabuf *msg) 564{ 565 u16 methods; 566 if (!reg->sel_reg_union) 567 return 0; 568 methods = reg->wps->config_methods; 569 methods &= ~WPS_CONFIG_PUSHBUTTON; 570#ifdef CONFIG_WPS2 571 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 572 WPS_CONFIG_PHY_PUSHBUTTON); 573#endif /* CONFIG_WPS2 */ 574 if (reg->pbc) 575 wps_set_pushbutton(&methods, reg->wps->config_methods); 576 if (reg->sel_reg_config_methods_override >= 0) 577 methods = reg->sel_reg_config_methods_override; 578 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar Config Methods (%x)", 579 methods); 580 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR_CONFIG_METHODS); 581 wpabuf_put_be16(msg, 2); 582 wpabuf_put_be16(msg, methods); 583 return 0; 584} 585 586 587static int wps_build_probe_config_methods(struct wps_registrar *reg, 588 struct wpabuf *msg) 589{ 590 u16 methods; 591 /* 592 * These are the methods that the AP supports as an Enrollee for adding 593 * external Registrars. 594 */ 595 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 596#ifdef CONFIG_WPS2 597 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 598 WPS_CONFIG_PHY_PUSHBUTTON); 599#endif /* CONFIG_WPS2 */ 600 wpa_printf(MSG_DEBUG, "WPS: * Config Methods (%x)", methods); 601 wpabuf_put_be16(msg, ATTR_CONFIG_METHODS); 602 wpabuf_put_be16(msg, 2); 603 wpabuf_put_be16(msg, methods); 604 return 0; 605} 606 607 608static int wps_build_config_methods_r(struct wps_registrar *reg, 609 struct wpabuf *msg) 610{ 611 return wps_build_config_methods(msg, reg->wps->config_methods); 612} 613 614 615const u8 * wps_authorized_macs(struct wps_registrar *reg, size_t *count) 616{ 617 *count = 0; 618 619#ifdef CONFIG_WPS2 620 while (*count < WPS_MAX_AUTHORIZED_MACS) { 621 if (is_zero_ether_addr(reg->authorized_macs_union[*count])) 622 break; 623 (*count)++; 624 } 625#endif /* CONFIG_WPS2 */ 626 627 return (const u8 *) reg->authorized_macs_union; 628} 629 630 631/** 632 * wps_registrar_init - Initialize WPS Registrar data 633 * @wps: Pointer to longterm WPS context 634 * @cfg: Registrar configuration 635 * Returns: Pointer to allocated Registrar data or %NULL on failure 636 * 637 * This function is used to initialize WPS Registrar functionality. It can be 638 * used for a single Registrar run (e.g., when run in a supplicant) or multiple 639 * runs (e.g., when run as an internal Registrar in an AP). Caller is 640 * responsible for freeing the returned data with wps_registrar_deinit() when 641 * Registrar functionality is not needed anymore. 642 */ 643struct wps_registrar * 644wps_registrar_init(struct wps_context *wps, 645 const struct wps_registrar_config *cfg) 646{ 647 struct wps_registrar *reg = os_zalloc(sizeof(*reg)); 648 if (reg == NULL) 649 return NULL; 650 651 dl_list_init(®->pins); 652 dl_list_init(®->nfc_pw_tokens); 653 reg->wps = wps; 654 reg->new_psk_cb = cfg->new_psk_cb; 655 reg->set_ie_cb = cfg->set_ie_cb; 656 reg->pin_needed_cb = cfg->pin_needed_cb; 657 reg->reg_success_cb = cfg->reg_success_cb; 658 reg->set_sel_reg_cb = cfg->set_sel_reg_cb; 659 reg->enrollee_seen_cb = cfg->enrollee_seen_cb; 660 reg->cb_ctx = cfg->cb_ctx; 661 reg->skip_cred_build = cfg->skip_cred_build; 662 if (cfg->extra_cred) { 663 reg->extra_cred = wpabuf_alloc_copy(cfg->extra_cred, 664 cfg->extra_cred_len); 665 if (reg->extra_cred == NULL) { 666 os_free(reg); 667 return NULL; 668 } 669 } 670 reg->disable_auto_conf = cfg->disable_auto_conf; 671 reg->sel_reg_dev_password_id_override = -1; 672 reg->sel_reg_config_methods_override = -1; 673 reg->static_wep_only = cfg->static_wep_only; 674 reg->dualband = cfg->dualband; 675 676 if (wps_set_ie(reg)) { 677 wps_registrar_deinit(reg); 678 return NULL; 679 } 680 681 return reg; 682} 683 684 685/** 686 * wps_registrar_deinit - Deinitialize WPS Registrar data 687 * @reg: Registrar data from wps_registrar_init() 688 */ 689void wps_registrar_deinit(struct wps_registrar *reg) 690{ 691 if (reg == NULL) 692 return; 693 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 694 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 695 wps_free_pins(®->pins); 696 wps_free_nfc_pw_tokens(®->nfc_pw_tokens, 0); 697 wps_free_pbc_sessions(reg->pbc_sessions); 698 wpabuf_free(reg->extra_cred); 699 wps_free_devices(reg->devices); 700 os_free(reg); 701} 702 703 704static void wps_registrar_invalidate_unused(struct wps_registrar *reg) 705{ 706 struct wps_uuid_pin *pin; 707 708 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 709 if (pin->wildcard_uuid == 1 && !(pin->flags & PIN_LOCKED)) { 710 wpa_printf(MSG_DEBUG, "WPS: Invalidate previously " 711 "configured wildcard PIN"); 712 wps_registrar_remove_pin(reg, pin); 713 break; 714 } 715 } 716} 717 718 719/** 720 * wps_registrar_add_pin - Configure a new PIN for Registrar 721 * @reg: Registrar data from wps_registrar_init() 722 * @addr: Enrollee MAC address or %NULL if not known 723 * @uuid: UUID-E or %NULL for wildcard (any UUID) 724 * @pin: PIN (Device Password) 725 * @pin_len: Length of pin in octets 726 * @timeout: Time (in seconds) when the PIN will be invalidated; 0 = no timeout 727 * Returns: 0 on success, -1 on failure 728 */ 729int wps_registrar_add_pin(struct wps_registrar *reg, const u8 *addr, 730 const u8 *uuid, const u8 *pin, size_t pin_len, 731 int timeout) 732{ 733 struct wps_uuid_pin *p; 734 735 p = os_zalloc(sizeof(*p)); 736 if (p == NULL) 737 return -1; 738 if (addr) 739 os_memcpy(p->enrollee_addr, addr, ETH_ALEN); 740 if (uuid == NULL) 741 p->wildcard_uuid = 1; 742 else 743 os_memcpy(p->uuid, uuid, WPS_UUID_LEN); 744 p->pin = os_malloc(pin_len); 745 if (p->pin == NULL) { 746 os_free(p); 747 return -1; 748 } 749 os_memcpy(p->pin, pin, pin_len); 750 p->pin_len = pin_len; 751 752 if (timeout) { 753 p->flags |= PIN_EXPIRES; 754 os_get_time(&p->expiration); 755 p->expiration.sec += timeout; 756 } 757 758 if (p->wildcard_uuid) 759 wps_registrar_invalidate_unused(reg); 760 761 dl_list_add(®->pins, &p->list); 762 763 wpa_printf(MSG_DEBUG, "WPS: A new PIN configured (timeout=%d)", 764 timeout); 765 wpa_hexdump(MSG_DEBUG, "WPS: UUID", uuid, WPS_UUID_LEN); 766 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: PIN", pin, pin_len); 767 reg->selected_registrar = 1; 768 reg->pbc = 0; 769 if (addr) 770 wps_registrar_add_authorized_mac(reg, addr); 771 else 772 wps_registrar_add_authorized_mac( 773 reg, (u8 *) "\xff\xff\xff\xff\xff\xff"); 774 wps_registrar_selected_registrar_changed(reg); 775 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 776 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, 777 wps_registrar_set_selected_timeout, 778 reg, NULL); 779 780 return 0; 781} 782 783 784static void wps_registrar_remove_pin(struct wps_registrar *reg, 785 struct wps_uuid_pin *pin) 786{ 787 u8 *addr; 788 u8 bcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 789 790 if (is_zero_ether_addr(pin->enrollee_addr)) 791 addr = bcast; 792 else 793 addr = pin->enrollee_addr; 794 wps_registrar_remove_authorized_mac(reg, addr); 795 wps_remove_pin(pin); 796 wps_registrar_selected_registrar_changed(reg); 797} 798 799 800static void wps_registrar_expire_pins(struct wps_registrar *reg) 801{ 802 struct wps_uuid_pin *pin, *prev; 803 struct os_time now; 804 805 os_get_time(&now); 806 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 807 { 808 if ((pin->flags & PIN_EXPIRES) && 809 os_time_before(&pin->expiration, &now)) { 810 wpa_hexdump(MSG_DEBUG, "WPS: Expired PIN for UUID", 811 pin->uuid, WPS_UUID_LEN); 812 wps_registrar_remove_pin(reg, pin); 813 } 814 } 815} 816 817 818/** 819 * wps_registrar_invalidate_wildcard_pin - Invalidate a wildcard PIN 820 * @reg: Registrar data from wps_registrar_init() 821 * @dev_pw: PIN to search for or %NULL to match any 822 * @dev_pw_len: Length of dev_pw in octets 823 * Returns: 0 on success, -1 if not wildcard PIN is enabled 824 */ 825static int wps_registrar_invalidate_wildcard_pin(struct wps_registrar *reg, 826 const u8 *dev_pw, 827 size_t dev_pw_len) 828{ 829 struct wps_uuid_pin *pin, *prev; 830 831 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 832 { 833 if (dev_pw && pin->pin && 834 (dev_pw_len != pin->pin_len || 835 os_memcmp(dev_pw, pin->pin, dev_pw_len) != 0)) 836 continue; /* different PIN */ 837 if (pin->wildcard_uuid) { 838 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID", 839 pin->uuid, WPS_UUID_LEN); 840 wps_registrar_remove_pin(reg, pin); 841 return 0; 842 } 843 } 844 845 return -1; 846} 847 848 849/** 850 * wps_registrar_invalidate_pin - Invalidate a PIN for a specific UUID-E 851 * @reg: Registrar data from wps_registrar_init() 852 * @uuid: UUID-E 853 * Returns: 0 on success, -1 on failure (e.g., PIN not found) 854 */ 855int wps_registrar_invalidate_pin(struct wps_registrar *reg, const u8 *uuid) 856{ 857 struct wps_uuid_pin *pin, *prev; 858 859 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list) 860 { 861 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 862 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID", 863 pin->uuid, WPS_UUID_LEN); 864 wps_registrar_remove_pin(reg, pin); 865 return 0; 866 } 867 } 868 869 return -1; 870} 871 872 873static const u8 * wps_registrar_get_pin(struct wps_registrar *reg, 874 const u8 *uuid, size_t *pin_len) 875{ 876 struct wps_uuid_pin *pin, *found = NULL; 877 878 wps_registrar_expire_pins(reg); 879 880 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 881 if (!pin->wildcard_uuid && 882 os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 883 found = pin; 884 break; 885 } 886 } 887 888 if (!found) { 889 /* Check for wildcard UUIDs since none of the UUID-specific 890 * PINs matched */ 891 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 892 if (pin->wildcard_uuid == 1 || 893 pin->wildcard_uuid == 2) { 894 wpa_printf(MSG_DEBUG, "WPS: Found a wildcard " 895 "PIN. Assigned it for this UUID-E"); 896 pin->wildcard_uuid++; 897 os_memcpy(pin->uuid, uuid, WPS_UUID_LEN); 898 found = pin; 899 break; 900 } 901 } 902 } 903 904 if (!found) 905 return NULL; 906 907 /* 908 * Lock the PIN to avoid attacks based on concurrent re-use of the PIN 909 * that could otherwise avoid PIN invalidations. 910 */ 911 if (found->flags & PIN_LOCKED) { 912 wpa_printf(MSG_DEBUG, "WPS: Selected PIN locked - do not " 913 "allow concurrent re-use"); 914 return NULL; 915 } 916 *pin_len = found->pin_len; 917 found->flags |= PIN_LOCKED; 918 return found->pin; 919} 920 921 922/** 923 * wps_registrar_unlock_pin - Unlock a PIN for a specific UUID-E 924 * @reg: Registrar data from wps_registrar_init() 925 * @uuid: UUID-E 926 * Returns: 0 on success, -1 on failure 927 * 928 * PINs are locked to enforce only one concurrent use. This function unlocks a 929 * PIN to allow it to be used again. If the specified PIN was configured using 930 * a wildcard UUID, it will be removed instead of allowing multiple uses. 931 */ 932int wps_registrar_unlock_pin(struct wps_registrar *reg, const u8 *uuid) 933{ 934 struct wps_uuid_pin *pin; 935 936 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) { 937 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) { 938 if (pin->wildcard_uuid == 3) { 939 wpa_printf(MSG_DEBUG, "WPS: Invalidating used " 940 "wildcard PIN"); 941 return wps_registrar_invalidate_pin(reg, uuid); 942 } 943 pin->flags &= ~PIN_LOCKED; 944 return 0; 945 } 946 } 947 948 return -1; 949} 950 951 952static void wps_registrar_stop_pbc(struct wps_registrar *reg) 953{ 954 reg->selected_registrar = 0; 955 reg->pbc = 0; 956 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN); 957 wps_registrar_remove_authorized_mac(reg, 958 (u8 *) "\xff\xff\xff\xff\xff\xff"); 959 wps_registrar_selected_registrar_changed(reg); 960} 961 962 963static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx) 964{ 965 struct wps_registrar *reg = eloop_ctx; 966 967 wpa_printf(MSG_DEBUG, "WPS: PBC timed out - disable PBC mode"); 968 wps_pbc_timeout_event(reg->wps); 969 wps_registrar_stop_pbc(reg); 970} 971 972 973/** 974 * wps_registrar_button_pushed - Notify Registrar that AP button was pushed 975 * @reg: Registrar data from wps_registrar_init() 976 * @p2p_dev_addr: Limit allowed PBC devices to the specified P2P device, %NULL 977 * indicates no such filtering 978 * Returns: 0 on success, -1 on failure, -2 on session overlap 979 * 980 * This function is called on an AP when a push button is pushed to activate 981 * PBC mode. The PBC mode will be stopped after walk time (2 minutes) timeout 982 * or when a PBC registration is completed. If more than one Enrollee in active 983 * PBC mode has been detected during the monitor time (previous 2 minutes), the 984 * PBC mode is not activated and -2 is returned to indicate session overlap. 985 * This is skipped if a specific Enrollee is selected. 986 */ 987int wps_registrar_button_pushed(struct wps_registrar *reg, 988 const u8 *p2p_dev_addr) 989{ 990 if (p2p_dev_addr == NULL && 991 wps_registrar_pbc_overlap(reg, NULL, NULL)) { 992 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - do not start PBC " 993 "mode"); 994 wps_pbc_overlap_event(reg->wps); 995 return -2; 996 } 997 wpa_printf(MSG_DEBUG, "WPS: Button pushed - PBC mode started"); 998 reg->force_pbc_overlap = 0; 999 reg->selected_registrar = 1; 1000 reg->pbc = 1; 1001 if (p2p_dev_addr) 1002 os_memcpy(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN); 1003 else 1004 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN); 1005 wps_registrar_add_authorized_mac(reg, 1006 (u8 *) "\xff\xff\xff\xff\xff\xff"); 1007 wps_registrar_selected_registrar_changed(reg); 1008 1009 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 1010 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 1011 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wps_registrar_pbc_timeout, 1012 reg, NULL); 1013 return 0; 1014} 1015 1016 1017static void wps_registrar_pbc_completed(struct wps_registrar *reg) 1018{ 1019 wpa_printf(MSG_DEBUG, "WPS: PBC completed - stopping PBC mode"); 1020 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 1021 wps_registrar_stop_pbc(reg); 1022} 1023 1024 1025static void wps_registrar_pin_completed(struct wps_registrar *reg) 1026{ 1027 wpa_printf(MSG_DEBUG, "WPS: PIN completed using internal Registrar"); 1028 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL); 1029 reg->selected_registrar = 0; 1030 wps_registrar_selected_registrar_changed(reg); 1031} 1032 1033 1034void wps_registrar_complete(struct wps_registrar *registrar, const u8 *uuid_e, 1035 const u8 *dev_pw, size_t dev_pw_len) 1036{ 1037 if (registrar->pbc) { 1038 wps_registrar_remove_pbc_session(registrar, 1039 uuid_e, NULL); 1040 wps_registrar_pbc_completed(registrar); 1041 os_get_time(®istrar->pbc_ignore_start); 1042 os_memcpy(registrar->pbc_ignore_uuid, uuid_e, WPS_UUID_LEN); 1043 } else { 1044 wps_registrar_pin_completed(registrar); 1045 } 1046 1047 if (dev_pw && 1048 wps_registrar_invalidate_wildcard_pin(registrar, dev_pw, 1049 dev_pw_len) == 0) { 1050 wpa_hexdump_key(MSG_DEBUG, "WPS: Invalidated wildcard PIN", 1051 dev_pw, dev_pw_len); 1052 } 1053} 1054 1055 1056int wps_registrar_wps_cancel(struct wps_registrar *reg) 1057{ 1058 if (reg->pbc) { 1059 wpa_printf(MSG_DEBUG, "WPS: PBC is set - cancelling it"); 1060 wps_registrar_pbc_timeout(reg, NULL); 1061 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL); 1062 return 1; 1063 } else if (reg->selected_registrar) { 1064 /* PIN Method */ 1065 wpa_printf(MSG_DEBUG, "WPS: PIN is set - cancelling it"); 1066 wps_registrar_pin_completed(reg); 1067 wps_registrar_invalidate_wildcard_pin(reg, NULL, 0); 1068 return 1; 1069 } 1070 return 0; 1071} 1072 1073 1074/** 1075 * wps_registrar_probe_req_rx - Notify Registrar of Probe Request 1076 * @reg: Registrar data from wps_registrar_init() 1077 * @addr: MAC address of the Probe Request sender 1078 * @wps_data: WPS IE contents 1079 * 1080 * This function is called on an AP when a Probe Request with WPS IE is 1081 * received. This is used to track PBC mode use and to detect possible overlap 1082 * situation with other WPS APs. 1083 */ 1084void wps_registrar_probe_req_rx(struct wps_registrar *reg, const u8 *addr, 1085 const struct wpabuf *wps_data, 1086 int p2p_wildcard) 1087{ 1088 struct wps_parse_attr attr; 1089 int skip_add = 0; 1090 1091 wpa_hexdump_buf(MSG_MSGDUMP, 1092 "WPS: Probe Request with WPS data received", 1093 wps_data); 1094 1095 if (wps_parse_msg(wps_data, &attr) < 0) 1096 return; 1097 1098 if (attr.config_methods == NULL) { 1099 wpa_printf(MSG_DEBUG, "WPS: No Config Methods attribute in " 1100 "Probe Request"); 1101 return; 1102 } 1103 1104 if (attr.dev_password_id == NULL) { 1105 wpa_printf(MSG_DEBUG, "WPS: No Device Password Id attribute " 1106 "in Probe Request"); 1107 return; 1108 } 1109 1110 if (reg->enrollee_seen_cb && attr.uuid_e && 1111 attr.primary_dev_type && attr.request_type && !p2p_wildcard) { 1112 char *dev_name = NULL; 1113 if (attr.dev_name) { 1114 dev_name = os_zalloc(attr.dev_name_len + 1); 1115 if (dev_name) { 1116 os_memcpy(dev_name, attr.dev_name, 1117 attr.dev_name_len); 1118 } 1119 } 1120 reg->enrollee_seen_cb(reg->cb_ctx, addr, attr.uuid_e, 1121 attr.primary_dev_type, 1122 WPA_GET_BE16(attr.config_methods), 1123 WPA_GET_BE16(attr.dev_password_id), 1124 *attr.request_type, dev_name); 1125 os_free(dev_name); 1126 } 1127 1128 if (WPA_GET_BE16(attr.dev_password_id) != DEV_PW_PUSHBUTTON) 1129 return; /* Not PBC */ 1130 1131 wpa_printf(MSG_DEBUG, "WPS: Probe Request for PBC received from " 1132 MACSTR, MAC2STR(addr)); 1133 if (attr.uuid_e == NULL) { 1134 wpa_printf(MSG_DEBUG, "WPS: Invalid Probe Request WPS IE: No " 1135 "UUID-E included"); 1136 return; 1137 } 1138 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E from Probe Request", attr.uuid_e, 1139 WPS_UUID_LEN); 1140 1141#ifdef WPS_WORKAROUNDS 1142 if (reg->pbc_ignore_start.sec && 1143 os_memcmp(attr.uuid_e, reg->pbc_ignore_uuid, WPS_UUID_LEN) == 0) { 1144 struct os_time now, dur; 1145 os_get_time(&now); 1146 os_time_sub(&now, ®->pbc_ignore_start, &dur); 1147 if (dur.sec >= 0 && dur.sec < 5) { 1148 wpa_printf(MSG_DEBUG, "WPS: Ignore PBC activation " 1149 "based on Probe Request from the Enrollee " 1150 "that just completed PBC provisioning"); 1151 skip_add = 1; 1152 } else 1153 reg->pbc_ignore_start.sec = 0; 1154 } 1155#endif /* WPS_WORKAROUNDS */ 1156 1157 if (!skip_add) 1158 wps_registrar_add_pbc_session(reg, addr, attr.uuid_e); 1159 if (wps_registrar_pbc_overlap(reg, addr, attr.uuid_e)) { 1160 wpa_printf(MSG_DEBUG, "WPS: PBC session overlap detected"); 1161 reg->force_pbc_overlap = 1; 1162 wps_pbc_overlap_event(reg->wps); 1163 } 1164} 1165 1166 1167static int wps_cb_new_psk(struct wps_registrar *reg, const u8 *mac_addr, 1168 const u8 *psk, size_t psk_len) 1169{ 1170 if (reg->new_psk_cb == NULL) 1171 return 0; 1172 1173 return reg->new_psk_cb(reg->cb_ctx, mac_addr, psk, 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)) || 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)) || 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"); 1378 wps_cb_pin_needed(wps->wps->registrar, wps->uuid_e, 1379 &wps->peer_dev); 1380 return -1; 1381 } 1382 1383 wps->dev_password = os_malloc(pin_len); 1384 if (wps->dev_password == NULL) 1385 return -1; 1386 os_memcpy(wps->dev_password, pin, pin_len); 1387 wps->dev_password_len = pin_len; 1388 1389 return 0; 1390} 1391 1392 1393static int wps_build_uuid_r(struct wps_data *wps, struct wpabuf *msg) 1394{ 1395 wpa_printf(MSG_DEBUG, "WPS: * UUID-R"); 1396 wpabuf_put_be16(msg, ATTR_UUID_R); 1397 wpabuf_put_be16(msg, WPS_UUID_LEN); 1398 wpabuf_put_data(msg, wps->uuid_r, WPS_UUID_LEN); 1399 return 0; 1400} 1401 1402 1403static int wps_build_r_hash(struct wps_data *wps, struct wpabuf *msg) 1404{ 1405 u8 *hash; 1406 const u8 *addr[4]; 1407 size_t len[4]; 1408 1409 if (random_get_bytes(wps->snonce, 2 * WPS_SECRET_NONCE_LEN) < 0) 1410 return -1; 1411 wpa_hexdump(MSG_DEBUG, "WPS: R-S1", wps->snonce, WPS_SECRET_NONCE_LEN); 1412 wpa_hexdump(MSG_DEBUG, "WPS: R-S2", 1413 wps->snonce + WPS_SECRET_NONCE_LEN, WPS_SECRET_NONCE_LEN); 1414 1415 if (wps->dh_pubkey_e == NULL || wps->dh_pubkey_r == NULL) { 1416 wpa_printf(MSG_DEBUG, "WPS: DH public keys not available for " 1417 "R-Hash derivation"); 1418 return -1; 1419 } 1420 1421 wpa_printf(MSG_DEBUG, "WPS: * R-Hash1"); 1422 wpabuf_put_be16(msg, ATTR_R_HASH1); 1423 wpabuf_put_be16(msg, SHA256_MAC_LEN); 1424 hash = wpabuf_put(msg, SHA256_MAC_LEN); 1425 /* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */ 1426 addr[0] = wps->snonce; 1427 len[0] = WPS_SECRET_NONCE_LEN; 1428 addr[1] = wps->psk1; 1429 len[1] = WPS_PSK_LEN; 1430 addr[2] = wpabuf_head(wps->dh_pubkey_e); 1431 len[2] = wpabuf_len(wps->dh_pubkey_e); 1432 addr[3] = wpabuf_head(wps->dh_pubkey_r); 1433 len[3] = wpabuf_len(wps->dh_pubkey_r); 1434 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 1435 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash1", hash, SHA256_MAC_LEN); 1436 1437 wpa_printf(MSG_DEBUG, "WPS: * R-Hash2"); 1438 wpabuf_put_be16(msg, ATTR_R_HASH2); 1439 wpabuf_put_be16(msg, SHA256_MAC_LEN); 1440 hash = wpabuf_put(msg, SHA256_MAC_LEN); 1441 /* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */ 1442 addr[0] = wps->snonce + WPS_SECRET_NONCE_LEN; 1443 addr[1] = wps->psk2; 1444 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 1445 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash2", hash, SHA256_MAC_LEN); 1446 1447 return 0; 1448} 1449 1450 1451static int wps_build_r_snonce1(struct wps_data *wps, struct wpabuf *msg) 1452{ 1453 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce1"); 1454 wpabuf_put_be16(msg, ATTR_R_SNONCE1); 1455 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN); 1456 wpabuf_put_data(msg, wps->snonce, WPS_SECRET_NONCE_LEN); 1457 return 0; 1458} 1459 1460 1461static int wps_build_r_snonce2(struct wps_data *wps, struct wpabuf *msg) 1462{ 1463 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce2"); 1464 wpabuf_put_be16(msg, ATTR_R_SNONCE2); 1465 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN); 1466 wpabuf_put_data(msg, wps->snonce + WPS_SECRET_NONCE_LEN, 1467 WPS_SECRET_NONCE_LEN); 1468 return 0; 1469} 1470 1471 1472static int wps_build_cred_network_idx(struct wpabuf *msg, 1473 const struct wps_credential *cred) 1474{ 1475 wpa_printf(MSG_DEBUG, "WPS: * Network Index (1)"); 1476 wpabuf_put_be16(msg, ATTR_NETWORK_INDEX); 1477 wpabuf_put_be16(msg, 1); 1478 wpabuf_put_u8(msg, 1); 1479 return 0; 1480} 1481 1482 1483static int wps_build_cred_ssid(struct wpabuf *msg, 1484 const struct wps_credential *cred) 1485{ 1486 wpa_printf(MSG_DEBUG, "WPS: * SSID"); 1487 wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID for Credential", 1488 cred->ssid, cred->ssid_len); 1489 wpabuf_put_be16(msg, ATTR_SSID); 1490 wpabuf_put_be16(msg, cred->ssid_len); 1491 wpabuf_put_data(msg, cred->ssid, cred->ssid_len); 1492 return 0; 1493} 1494 1495 1496static int wps_build_cred_auth_type(struct wpabuf *msg, 1497 const struct wps_credential *cred) 1498{ 1499 wpa_printf(MSG_DEBUG, "WPS: * Authentication Type (0x%x)", 1500 cred->auth_type); 1501 wpabuf_put_be16(msg, ATTR_AUTH_TYPE); 1502 wpabuf_put_be16(msg, 2); 1503 wpabuf_put_be16(msg, cred->auth_type); 1504 return 0; 1505} 1506 1507 1508static int wps_build_cred_encr_type(struct wpabuf *msg, 1509 const struct wps_credential *cred) 1510{ 1511 wpa_printf(MSG_DEBUG, "WPS: * Encryption Type (0x%x)", 1512 cred->encr_type); 1513 wpabuf_put_be16(msg, ATTR_ENCR_TYPE); 1514 wpabuf_put_be16(msg, 2); 1515 wpabuf_put_be16(msg, cred->encr_type); 1516 return 0; 1517} 1518 1519 1520static int wps_build_cred_network_key(struct wpabuf *msg, 1521 const struct wps_credential *cred) 1522{ 1523 wpa_printf(MSG_DEBUG, "WPS: * Network Key (len=%d)", 1524 (int) cred->key_len); 1525 wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key", 1526 cred->key, cred->key_len); 1527 wpabuf_put_be16(msg, ATTR_NETWORK_KEY); 1528 wpabuf_put_be16(msg, cred->key_len); 1529 wpabuf_put_data(msg, cred->key, cred->key_len); 1530 return 0; 1531} 1532 1533 1534static int wps_build_cred_mac_addr(struct wpabuf *msg, 1535 const struct wps_credential *cred) 1536{ 1537 wpa_printf(MSG_DEBUG, "WPS: * MAC Address (" MACSTR ")", 1538 MAC2STR(cred->mac_addr)); 1539 wpabuf_put_be16(msg, ATTR_MAC_ADDR); 1540 wpabuf_put_be16(msg, ETH_ALEN); 1541 wpabuf_put_data(msg, cred->mac_addr, ETH_ALEN); 1542 return 0; 1543} 1544 1545 1546static int wps_build_credential(struct wpabuf *msg, 1547 const struct wps_credential *cred) 1548{ 1549 if (wps_build_cred_network_idx(msg, cred) || 1550 wps_build_cred_ssid(msg, cred) || 1551 wps_build_cred_auth_type(msg, cred) || 1552 wps_build_cred_encr_type(msg, cred) || 1553 wps_build_cred_network_key(msg, cred) || 1554 wps_build_cred_mac_addr(msg, cred)) 1555 return -1; 1556 return 0; 1557} 1558 1559 1560int wps_build_credential_wrap(struct wpabuf *msg, 1561 const struct wps_credential *cred) 1562{ 1563 struct wpabuf *wbuf; 1564 wbuf = wpabuf_alloc(200); 1565 if (wbuf == NULL) 1566 return -1; 1567 if (wps_build_credential(wbuf, cred)) { 1568 wpabuf_free(wbuf); 1569 return -1; 1570 } 1571 wpabuf_put_be16(msg, ATTR_CRED); 1572 wpabuf_put_be16(msg, wpabuf_len(wbuf)); 1573 wpabuf_put_buf(msg, wbuf); 1574 wpabuf_free(wbuf); 1575 return 0; 1576} 1577 1578 1579int wps_build_cred(struct wps_data *wps, struct wpabuf *msg) 1580{ 1581 struct wpabuf *cred; 1582 1583 if (wps->wps->registrar->skip_cred_build) 1584 goto skip_cred_build; 1585 1586 wpa_printf(MSG_DEBUG, "WPS: * Credential"); 1587 if (wps->use_cred) { 1588 os_memcpy(&wps->cred, wps->use_cred, sizeof(wps->cred)); 1589 goto use_provided; 1590 } 1591 os_memset(&wps->cred, 0, sizeof(wps->cred)); 1592 1593 os_memcpy(wps->cred.ssid, wps->wps->ssid, wps->wps->ssid_len); 1594 wps->cred.ssid_len = wps->wps->ssid_len; 1595 1596 /* Select the best authentication and encryption type */ 1597 if (wps->auth_type & WPS_AUTH_WPA2PSK) 1598 wps->auth_type = WPS_AUTH_WPA2PSK; 1599 else if (wps->auth_type & WPS_AUTH_WPAPSK) 1600 wps->auth_type = WPS_AUTH_WPAPSK; 1601 else if (wps->auth_type & WPS_AUTH_OPEN) 1602 wps->auth_type = WPS_AUTH_OPEN; 1603 else if (wps->auth_type & WPS_AUTH_SHARED) 1604 wps->auth_type = WPS_AUTH_SHARED; 1605 else { 1606 wpa_printf(MSG_DEBUG, "WPS: Unsupported auth_type 0x%x", 1607 wps->auth_type); 1608 return -1; 1609 } 1610 wps->cred.auth_type = wps->auth_type; 1611 1612 if (wps->auth_type == WPS_AUTH_WPA2PSK || 1613 wps->auth_type == WPS_AUTH_WPAPSK) { 1614 if (wps->encr_type & WPS_ENCR_AES) 1615 wps->encr_type = WPS_ENCR_AES; 1616 else if (wps->encr_type & WPS_ENCR_TKIP) 1617 wps->encr_type = WPS_ENCR_TKIP; 1618 else { 1619 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption " 1620 "type for WPA/WPA2"); 1621 return -1; 1622 } 1623 } else { 1624 if (wps->encr_type & WPS_ENCR_WEP) 1625 wps->encr_type = WPS_ENCR_WEP; 1626 else if (wps->encr_type & WPS_ENCR_NONE) 1627 wps->encr_type = WPS_ENCR_NONE; 1628 else { 1629 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption " 1630 "type for non-WPA/WPA2 mode"); 1631 return -1; 1632 } 1633 } 1634 wps->cred.encr_type = wps->encr_type; 1635 /* 1636 * Set MAC address in the Credential to be the Enrollee's MAC address 1637 */ 1638 os_memcpy(wps->cred.mac_addr, wps->mac_addr_e, ETH_ALEN); 1639 1640 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->wps->ap && 1641 !wps->wps->registrar->disable_auto_conf) { 1642 u8 r[16]; 1643 /* Generate a random passphrase */ 1644 if (random_get_bytes(r, sizeof(r)) < 0) 1645 return -1; 1646 os_free(wps->new_psk); 1647 wps->new_psk = base64_encode(r, sizeof(r), &wps->new_psk_len); 1648 if (wps->new_psk == NULL) 1649 return -1; 1650 wps->new_psk_len--; /* remove newline */ 1651 while (wps->new_psk_len && 1652 wps->new_psk[wps->new_psk_len - 1] == '=') 1653 wps->new_psk_len--; 1654 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Generated passphrase", 1655 wps->new_psk, wps->new_psk_len); 1656 os_memcpy(wps->cred.key, wps->new_psk, wps->new_psk_len); 1657 wps->cred.key_len = wps->new_psk_len; 1658 } else if (wps->use_psk_key && wps->wps->psk_set) { 1659 char hex[65]; 1660 wpa_printf(MSG_DEBUG, "WPS: Use PSK format for Network Key"); 1661 wpa_snprintf_hex(hex, sizeof(hex), wps->wps->psk, 32); 1662 os_memcpy(wps->cred.key, hex, 32 * 2); 1663 wps->cred.key_len = 32 * 2; 1664 } else if (wps->wps->network_key) { 1665 os_memcpy(wps->cred.key, wps->wps->network_key, 1666 wps->wps->network_key_len); 1667 wps->cred.key_len = wps->wps->network_key_len; 1668 } else if (wps->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) { 1669 char hex[65]; 1670 /* Generate a random per-device PSK */ 1671 os_free(wps->new_psk); 1672 wps->new_psk_len = 32; 1673 wps->new_psk = os_malloc(wps->new_psk_len); 1674 if (wps->new_psk == NULL) 1675 return -1; 1676 if (random_get_bytes(wps->new_psk, wps->new_psk_len) < 0) { 1677 os_free(wps->new_psk); 1678 wps->new_psk = NULL; 1679 return -1; 1680 } 1681 wpa_hexdump_key(MSG_DEBUG, "WPS: Generated per-device PSK", 1682 wps->new_psk, wps->new_psk_len); 1683 wpa_snprintf_hex(hex, sizeof(hex), wps->new_psk, 1684 wps->new_psk_len); 1685 os_memcpy(wps->cred.key, hex, wps->new_psk_len * 2); 1686 wps->cred.key_len = wps->new_psk_len * 2; 1687 } 1688 1689use_provided: 1690#ifdef CONFIG_WPS_TESTING 1691 if (wps_testing_dummy_cred) 1692 cred = wpabuf_alloc(200); 1693 else 1694 cred = NULL; 1695 if (cred) { 1696 struct wps_credential dummy; 1697 wpa_printf(MSG_DEBUG, "WPS: Add dummy credential"); 1698 os_memset(&dummy, 0, sizeof(dummy)); 1699 os_memcpy(dummy.ssid, "dummy", 5); 1700 dummy.ssid_len = 5; 1701 dummy.auth_type = WPS_AUTH_WPA2PSK; 1702 dummy.encr_type = WPS_ENCR_AES; 1703 os_memcpy(dummy.key, "dummy psk", 9); 1704 dummy.key_len = 9; 1705 os_memcpy(dummy.mac_addr, wps->mac_addr_e, ETH_ALEN); 1706 wps_build_credential(cred, &dummy); 1707 wpa_hexdump_buf(MSG_DEBUG, "WPS: Dummy Credential", cred); 1708 1709 wpabuf_put_be16(msg, ATTR_CRED); 1710 wpabuf_put_be16(msg, wpabuf_len(cred)); 1711 wpabuf_put_buf(msg, cred); 1712 1713 wpabuf_free(cred); 1714 } 1715#endif /* CONFIG_WPS_TESTING */ 1716 1717 cred = wpabuf_alloc(200); 1718 if (cred == NULL) 1719 return -1; 1720 1721 if (wps_build_credential(cred, &wps->cred)) { 1722 wpabuf_free(cred); 1723 return -1; 1724 } 1725 1726 wpabuf_put_be16(msg, ATTR_CRED); 1727 wpabuf_put_be16(msg, wpabuf_len(cred)); 1728 wpabuf_put_buf(msg, cred); 1729 wpabuf_free(cred); 1730 1731skip_cred_build: 1732 if (wps->wps->registrar->extra_cred) { 1733 wpa_printf(MSG_DEBUG, "WPS: * Credential (pre-configured)"); 1734 wpabuf_put_buf(msg, wps->wps->registrar->extra_cred); 1735 } 1736 1737 return 0; 1738} 1739 1740 1741static int wps_build_ap_settings(struct wps_data *wps, struct wpabuf *msg) 1742{ 1743 wpa_printf(MSG_DEBUG, "WPS: * AP Settings"); 1744 1745 if (wps_build_credential(msg, &wps->cred)) 1746 return -1; 1747 1748 return 0; 1749} 1750 1751 1752static struct wpabuf * wps_build_ap_cred(struct wps_data *wps) 1753{ 1754 struct wpabuf *msg, *plain; 1755 1756 msg = wpabuf_alloc(1000); 1757 if (msg == NULL) 1758 return NULL; 1759 1760 plain = wpabuf_alloc(200); 1761 if (plain == NULL) { 1762 wpabuf_free(msg); 1763 return NULL; 1764 } 1765 1766 if (wps_build_ap_settings(wps, plain)) { 1767 wpabuf_free(plain); 1768 wpabuf_free(msg); 1769 return NULL; 1770 } 1771 1772 wpabuf_put_be16(msg, ATTR_CRED); 1773 wpabuf_put_be16(msg, wpabuf_len(plain)); 1774 wpabuf_put_buf(msg, plain); 1775 wpabuf_free(plain); 1776 1777 return msg; 1778} 1779 1780 1781static struct wpabuf * wps_build_m2(struct wps_data *wps) 1782{ 1783 struct wpabuf *msg; 1784 1785 if (random_get_bytes(wps->nonce_r, WPS_NONCE_LEN) < 0) 1786 return NULL; 1787 wpa_hexdump(MSG_DEBUG, "WPS: Registrar Nonce", 1788 wps->nonce_r, WPS_NONCE_LEN); 1789 wpa_hexdump(MSG_DEBUG, "WPS: UUID-R", wps->uuid_r, WPS_UUID_LEN); 1790 1791 wpa_printf(MSG_DEBUG, "WPS: Building Message M2"); 1792 msg = wpabuf_alloc(1000); 1793 if (msg == NULL) 1794 return NULL; 1795 1796 if (wps_build_version(msg) || 1797 wps_build_msg_type(msg, WPS_M2) || 1798 wps_build_enrollee_nonce(wps, msg) || 1799 wps_build_registrar_nonce(wps, msg) || 1800 wps_build_uuid_r(wps, msg) || 1801 wps_build_public_key(wps, msg) || 1802 wps_derive_keys(wps) || 1803 wps_build_auth_type_flags(wps, msg) || 1804 wps_build_encr_type_flags(wps, msg) || 1805 wps_build_conn_type_flags(wps, msg) || 1806 wps_build_config_methods_r(wps->wps->registrar, msg) || 1807 wps_build_device_attrs(&wps->wps->dev, msg) || 1808 wps_build_rf_bands(&wps->wps->dev, msg) || 1809 wps_build_assoc_state(wps, msg) || 1810 wps_build_config_error(msg, WPS_CFG_NO_ERROR) || 1811 wps_build_dev_password_id(msg, wps->dev_pw_id) || 1812 wps_build_os_version(&wps->wps->dev, msg) || 1813 wps_build_wfa_ext(msg, 0, NULL, 0) || 1814 wps_build_authenticator(wps, msg)) { 1815 wpabuf_free(msg); 1816 return NULL; 1817 } 1818 1819 wps->int_reg = 1; 1820 wps->state = RECV_M3; 1821 return msg; 1822} 1823 1824 1825static struct wpabuf * wps_build_m2d(struct wps_data *wps) 1826{ 1827 struct wpabuf *msg; 1828 u16 err = wps->config_error; 1829 1830 wpa_printf(MSG_DEBUG, "WPS: Building Message M2D"); 1831 msg = wpabuf_alloc(1000); 1832 if (msg == NULL) 1833 return NULL; 1834 1835 if (wps->wps->ap && wps->wps->ap_setup_locked && 1836 err == WPS_CFG_NO_ERROR) 1837 err = WPS_CFG_SETUP_LOCKED; 1838 1839 if (wps_build_version(msg) || 1840 wps_build_msg_type(msg, WPS_M2D) || 1841 wps_build_enrollee_nonce(wps, msg) || 1842 wps_build_registrar_nonce(wps, msg) || 1843 wps_build_uuid_r(wps, msg) || 1844 wps_build_auth_type_flags(wps, msg) || 1845 wps_build_encr_type_flags(wps, msg) || 1846 wps_build_conn_type_flags(wps, msg) || 1847 wps_build_config_methods_r(wps->wps->registrar, msg) || 1848 wps_build_device_attrs(&wps->wps->dev, msg) || 1849 wps_build_rf_bands(&wps->wps->dev, msg) || 1850 wps_build_assoc_state(wps, msg) || 1851 wps_build_config_error(msg, err) || 1852 wps_build_os_version(&wps->wps->dev, msg) || 1853 wps_build_wfa_ext(msg, 0, NULL, 0)) { 1854 wpabuf_free(msg); 1855 return NULL; 1856 } 1857 1858 wps->state = RECV_M2D_ACK; 1859 return msg; 1860} 1861 1862 1863static struct wpabuf * wps_build_m4(struct wps_data *wps) 1864{ 1865 struct wpabuf *msg, *plain; 1866 1867 wpa_printf(MSG_DEBUG, "WPS: Building Message M4"); 1868 1869 wps_derive_psk(wps, wps->dev_password, wps->dev_password_len); 1870 1871 plain = wpabuf_alloc(200); 1872 if (plain == NULL) 1873 return NULL; 1874 1875 msg = wpabuf_alloc(1000); 1876 if (msg == NULL) { 1877 wpabuf_free(plain); 1878 return NULL; 1879 } 1880 1881 if (wps_build_version(msg) || 1882 wps_build_msg_type(msg, WPS_M4) || 1883 wps_build_enrollee_nonce(wps, msg) || 1884 wps_build_r_hash(wps, msg) || 1885 wps_build_r_snonce1(wps, plain) || 1886 wps_build_key_wrap_auth(wps, plain) || 1887 wps_build_encr_settings(wps, msg, plain) || 1888 wps_build_wfa_ext(msg, 0, NULL, 0) || 1889 wps_build_authenticator(wps, msg)) { 1890 wpabuf_free(plain); 1891 wpabuf_free(msg); 1892 return NULL; 1893 } 1894 wpabuf_free(plain); 1895 1896 wps->state = RECV_M5; 1897 return msg; 1898} 1899 1900 1901static struct wpabuf * wps_build_m6(struct wps_data *wps) 1902{ 1903 struct wpabuf *msg, *plain; 1904 1905 wpa_printf(MSG_DEBUG, "WPS: Building Message M6"); 1906 1907 plain = wpabuf_alloc(200); 1908 if (plain == NULL) 1909 return NULL; 1910 1911 msg = wpabuf_alloc(1000); 1912 if (msg == NULL) { 1913 wpabuf_free(plain); 1914 return NULL; 1915 } 1916 1917 if (wps_build_version(msg) || 1918 wps_build_msg_type(msg, WPS_M6) || 1919 wps_build_enrollee_nonce(wps, msg) || 1920 wps_build_r_snonce2(wps, plain) || 1921 wps_build_key_wrap_auth(wps, plain) || 1922 wps_build_encr_settings(wps, msg, plain) || 1923 wps_build_wfa_ext(msg, 0, NULL, 0) || 1924 wps_build_authenticator(wps, msg)) { 1925 wpabuf_free(plain); 1926 wpabuf_free(msg); 1927 return NULL; 1928 } 1929 wpabuf_free(plain); 1930 1931 wps->wps_pin_revealed = 1; 1932 wps->state = RECV_M7; 1933 return msg; 1934} 1935 1936 1937static struct wpabuf * wps_build_m8(struct wps_data *wps) 1938{ 1939 struct wpabuf *msg, *plain; 1940 1941 wpa_printf(MSG_DEBUG, "WPS: Building Message M8"); 1942 1943 plain = wpabuf_alloc(500); 1944 if (plain == NULL) 1945 return NULL; 1946 1947 msg = wpabuf_alloc(1000); 1948 if (msg == NULL) { 1949 wpabuf_free(plain); 1950 return NULL; 1951 } 1952 1953 if (wps_build_version(msg) || 1954 wps_build_msg_type(msg, WPS_M8) || 1955 wps_build_enrollee_nonce(wps, msg) || 1956 ((wps->wps->ap || wps->er) && wps_build_cred(wps, plain)) || 1957 (!wps->wps->ap && !wps->er && wps_build_ap_settings(wps, plain)) || 1958 wps_build_key_wrap_auth(wps, plain) || 1959 wps_build_encr_settings(wps, msg, plain) || 1960 wps_build_wfa_ext(msg, 0, NULL, 0) || 1961 wps_build_authenticator(wps, msg)) { 1962 wpabuf_free(plain); 1963 wpabuf_free(msg); 1964 return NULL; 1965 } 1966 wpabuf_free(plain); 1967 1968 wps->state = RECV_DONE; 1969 return msg; 1970} 1971 1972 1973struct wpabuf * wps_registrar_get_msg(struct wps_data *wps, 1974 enum wsc_op_code *op_code) 1975{ 1976 struct wpabuf *msg; 1977 1978#ifdef CONFIG_WPS_UPNP 1979 if (!wps->int_reg && wps->wps->wps_upnp) { 1980 struct upnp_pending_message *p, *prev = NULL; 1981 if (wps->ext_reg > 1) 1982 wps_registrar_free_pending_m2(wps->wps); 1983 p = wps->wps->upnp_msgs; 1984 /* TODO: check pending message MAC address */ 1985 while (p && p->next) { 1986 prev = p; 1987 p = p->next; 1988 } 1989 if (p) { 1990 wpa_printf(MSG_DEBUG, "WPS: Use pending message from " 1991 "UPnP"); 1992 if (prev) 1993 prev->next = NULL; 1994 else 1995 wps->wps->upnp_msgs = NULL; 1996 msg = p->msg; 1997 switch (p->type) { 1998 case WPS_WSC_ACK: 1999 *op_code = WSC_ACK; 2000 break; 2001 case WPS_WSC_NACK: 2002 *op_code = WSC_NACK; 2003 break; 2004 default: 2005 *op_code = WSC_MSG; 2006 break; 2007 } 2008 os_free(p); 2009 if (wps->ext_reg == 0) 2010 wps->ext_reg = 1; 2011 return msg; 2012 } 2013 } 2014 if (wps->ext_reg) { 2015 wpa_printf(MSG_DEBUG, "WPS: Using external Registrar, but no " 2016 "pending message available"); 2017 return NULL; 2018 } 2019#endif /* CONFIG_WPS_UPNP */ 2020 2021 switch (wps->state) { 2022 case SEND_M2: 2023 if (wps_get_dev_password(wps) < 0) 2024 msg = wps_build_m2d(wps); 2025 else 2026 msg = wps_build_m2(wps); 2027 *op_code = WSC_MSG; 2028 break; 2029 case SEND_M2D: 2030 msg = wps_build_m2d(wps); 2031 *op_code = WSC_MSG; 2032 break; 2033 case SEND_M4: 2034 msg = wps_build_m4(wps); 2035 *op_code = WSC_MSG; 2036 break; 2037 case SEND_M6: 2038 msg = wps_build_m6(wps); 2039 *op_code = WSC_MSG; 2040 break; 2041 case SEND_M8: 2042 msg = wps_build_m8(wps); 2043 *op_code = WSC_MSG; 2044 break; 2045 case RECV_DONE: 2046 msg = wps_build_wsc_ack(wps); 2047 *op_code = WSC_ACK; 2048 break; 2049 case SEND_WSC_NACK: 2050 msg = wps_build_wsc_nack(wps); 2051 *op_code = WSC_NACK; 2052 break; 2053 default: 2054 wpa_printf(MSG_DEBUG, "WPS: Unsupported state %d for building " 2055 "a message", wps->state); 2056 msg = NULL; 2057 break; 2058 } 2059 2060 if (*op_code == WSC_MSG && msg) { 2061 /* Save a copy of the last message for Authenticator derivation 2062 */ 2063 wpabuf_free(wps->last_msg); 2064 wps->last_msg = wpabuf_dup(msg); 2065 } 2066 2067 return msg; 2068} 2069 2070 2071static int wps_process_enrollee_nonce(struct wps_data *wps, const u8 *e_nonce) 2072{ 2073 if (e_nonce == NULL) { 2074 wpa_printf(MSG_DEBUG, "WPS: No Enrollee Nonce received"); 2075 return -1; 2076 } 2077 2078 os_memcpy(wps->nonce_e, e_nonce, WPS_NONCE_LEN); 2079 wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce", 2080 wps->nonce_e, WPS_NONCE_LEN); 2081 2082 return 0; 2083} 2084 2085 2086static int wps_process_registrar_nonce(struct wps_data *wps, const u8 *r_nonce) 2087{ 2088 if (r_nonce == NULL) { 2089 wpa_printf(MSG_DEBUG, "WPS: No Registrar Nonce received"); 2090 return -1; 2091 } 2092 2093 if (os_memcmp(wps->nonce_r, r_nonce, WPS_NONCE_LEN) != 0) { 2094 wpa_printf(MSG_DEBUG, "WPS: Invalid Registrar Nonce received"); 2095 return -1; 2096 } 2097 2098 return 0; 2099} 2100 2101 2102static int wps_process_uuid_e(struct wps_data *wps, const u8 *uuid_e) 2103{ 2104 if (uuid_e == NULL) { 2105 wpa_printf(MSG_DEBUG, "WPS: No UUID-E received"); 2106 return -1; 2107 } 2108 2109 os_memcpy(wps->uuid_e, uuid_e, WPS_UUID_LEN); 2110 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", wps->uuid_e, WPS_UUID_LEN); 2111 2112 return 0; 2113} 2114 2115 2116static int wps_process_dev_password_id(struct wps_data *wps, const u8 *pw_id) 2117{ 2118 if (pw_id == NULL) { 2119 wpa_printf(MSG_DEBUG, "WPS: No Device Password ID received"); 2120 return -1; 2121 } 2122 2123 wps->dev_pw_id = WPA_GET_BE16(pw_id); 2124 wpa_printf(MSG_DEBUG, "WPS: Device Password ID %d", wps->dev_pw_id); 2125 2126 return 0; 2127} 2128 2129 2130static int wps_process_e_hash1(struct wps_data *wps, const u8 *e_hash1) 2131{ 2132 if (e_hash1 == NULL) { 2133 wpa_printf(MSG_DEBUG, "WPS: No E-Hash1 received"); 2134 return -1; 2135 } 2136 2137 os_memcpy(wps->peer_hash1, e_hash1, WPS_HASH_LEN); 2138 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash1", wps->peer_hash1, WPS_HASH_LEN); 2139 2140 return 0; 2141} 2142 2143 2144static int wps_process_e_hash2(struct wps_data *wps, const u8 *e_hash2) 2145{ 2146 if (e_hash2 == NULL) { 2147 wpa_printf(MSG_DEBUG, "WPS: No E-Hash2 received"); 2148 return -1; 2149 } 2150 2151 os_memcpy(wps->peer_hash2, e_hash2, WPS_HASH_LEN); 2152 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash2", wps->peer_hash2, WPS_HASH_LEN); 2153 2154 return 0; 2155} 2156 2157 2158static int wps_process_e_snonce1(struct wps_data *wps, const u8 *e_snonce1) 2159{ 2160 u8 hash[SHA256_MAC_LEN]; 2161 const u8 *addr[4]; 2162 size_t len[4]; 2163 2164 if (e_snonce1 == NULL) { 2165 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce1 received"); 2166 return -1; 2167 } 2168 2169 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce1", e_snonce1, 2170 WPS_SECRET_NONCE_LEN); 2171 2172 /* E-Hash1 = HMAC_AuthKey(E-S1 || PSK1 || PK_E || PK_R) */ 2173 addr[0] = e_snonce1; 2174 len[0] = WPS_SECRET_NONCE_LEN; 2175 addr[1] = wps->psk1; 2176 len[1] = WPS_PSK_LEN; 2177 addr[2] = wpabuf_head(wps->dh_pubkey_e); 2178 len[2] = wpabuf_len(wps->dh_pubkey_e); 2179 addr[3] = wpabuf_head(wps->dh_pubkey_r); 2180 len[3] = wpabuf_len(wps->dh_pubkey_r); 2181 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 2182 2183 if (os_memcmp(wps->peer_hash1, hash, WPS_HASH_LEN) != 0) { 2184 wpa_printf(MSG_DEBUG, "WPS: E-Hash1 derived from E-S1 does " 2185 "not match with the pre-committed value"); 2186 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE; 2187 wps_pwd_auth_fail_event(wps->wps, 0, 1); 2188 return -1; 2189 } 2190 2191 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the first " 2192 "half of the device password"); 2193 2194 return 0; 2195} 2196 2197 2198static int wps_process_e_snonce2(struct wps_data *wps, const u8 *e_snonce2) 2199{ 2200 u8 hash[SHA256_MAC_LEN]; 2201 const u8 *addr[4]; 2202 size_t len[4]; 2203 2204 if (e_snonce2 == NULL) { 2205 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce2 received"); 2206 return -1; 2207 } 2208 2209 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce2", e_snonce2, 2210 WPS_SECRET_NONCE_LEN); 2211 2212 /* E-Hash2 = HMAC_AuthKey(E-S2 || PSK2 || PK_E || PK_R) */ 2213 addr[0] = e_snonce2; 2214 len[0] = WPS_SECRET_NONCE_LEN; 2215 addr[1] = wps->psk2; 2216 len[1] = WPS_PSK_LEN; 2217 addr[2] = wpabuf_head(wps->dh_pubkey_e); 2218 len[2] = wpabuf_len(wps->dh_pubkey_e); 2219 addr[3] = wpabuf_head(wps->dh_pubkey_r); 2220 len[3] = wpabuf_len(wps->dh_pubkey_r); 2221 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash); 2222 2223 if (os_memcmp(wps->peer_hash2, hash, WPS_HASH_LEN) != 0) { 2224 wpa_printf(MSG_DEBUG, "WPS: E-Hash2 derived from E-S2 does " 2225 "not match with the pre-committed value"); 2226 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e); 2227 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE; 2228 wps_pwd_auth_fail_event(wps->wps, 0, 2); 2229 return -1; 2230 } 2231 2232 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the second " 2233 "half of the device password"); 2234 wps->wps_pin_revealed = 0; 2235 wps_registrar_unlock_pin(wps->wps->registrar, wps->uuid_e); 2236 2237 /* 2238 * In case wildcard PIN is used and WPS handshake succeeds in the first 2239 * attempt, wps_registrar_unlock_pin() would not free the PIN, so make 2240 * sure the PIN gets invalidated here. 2241 */ 2242 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e); 2243 2244 return 0; 2245} 2246 2247 2248static int wps_process_mac_addr(struct wps_data *wps, const u8 *mac_addr) 2249{ 2250 if (mac_addr == NULL) { 2251 wpa_printf(MSG_DEBUG, "WPS: No MAC Address received"); 2252 return -1; 2253 } 2254 2255 wpa_printf(MSG_DEBUG, "WPS: Enrollee MAC Address " MACSTR, 2256 MAC2STR(mac_addr)); 2257 os_memcpy(wps->mac_addr_e, mac_addr, ETH_ALEN); 2258 os_memcpy(wps->peer_dev.mac_addr, mac_addr, ETH_ALEN); 2259 2260 return 0; 2261} 2262 2263 2264static int wps_process_pubkey(struct wps_data *wps, const u8 *pk, 2265 size_t pk_len) 2266{ 2267 if (pk == NULL || pk_len == 0) { 2268 wpa_printf(MSG_DEBUG, "WPS: No Public Key received"); 2269 return -1; 2270 } 2271 2272 wpabuf_free(wps->dh_pubkey_e); 2273 wps->dh_pubkey_e = wpabuf_alloc_copy(pk, pk_len); 2274 if (wps->dh_pubkey_e == NULL) 2275 return -1; 2276 2277 return 0; 2278} 2279 2280 2281static int wps_process_auth_type_flags(struct wps_data *wps, const u8 *auth) 2282{ 2283 u16 auth_types; 2284 2285 if (auth == NULL) { 2286 wpa_printf(MSG_DEBUG, "WPS: No Authentication Type flags " 2287 "received"); 2288 return -1; 2289 } 2290 2291 auth_types = WPA_GET_BE16(auth); 2292 2293 wpa_printf(MSG_DEBUG, "WPS: Enrollee Authentication Type flags 0x%x", 2294 auth_types); 2295 wps->auth_type = wps->wps->auth_types & auth_types; 2296 if (wps->auth_type == 0) { 2297 wpa_printf(MSG_DEBUG, "WPS: No match in supported " 2298 "authentication types (own 0x%x Enrollee 0x%x)", 2299 wps->wps->auth_types, auth_types); 2300#ifdef WPS_WORKAROUNDS 2301 /* 2302 * Some deployed implementations seem to advertise incorrect 2303 * information in this attribute. For example, Linksys WRT350N 2304 * seems to have a byteorder bug that breaks this negotiation. 2305 * In order to interoperate with existing implementations, 2306 * assume that the Enrollee supports everything we do. 2307 */ 2308 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee " 2309 "does not advertise supported authentication types " 2310 "correctly"); 2311 wps->auth_type = wps->wps->auth_types; 2312#else /* WPS_WORKAROUNDS */ 2313 return -1; 2314#endif /* WPS_WORKAROUNDS */ 2315 } 2316 2317 return 0; 2318} 2319 2320 2321static int wps_process_encr_type_flags(struct wps_data *wps, const u8 *encr) 2322{ 2323 u16 encr_types; 2324 2325 if (encr == NULL) { 2326 wpa_printf(MSG_DEBUG, "WPS: No Encryption Type flags " 2327 "received"); 2328 return -1; 2329 } 2330 2331 encr_types = WPA_GET_BE16(encr); 2332 2333 wpa_printf(MSG_DEBUG, "WPS: Enrollee Encryption Type flags 0x%x", 2334 encr_types); 2335 wps->encr_type = wps->wps->encr_types & encr_types; 2336 if (wps->encr_type == 0) { 2337 wpa_printf(MSG_DEBUG, "WPS: No match in supported " 2338 "encryption types (own 0x%x Enrollee 0x%x)", 2339 wps->wps->encr_types, encr_types); 2340#ifdef WPS_WORKAROUNDS 2341 /* 2342 * Some deployed implementations seem to advertise incorrect 2343 * information in this attribute. For example, Linksys WRT350N 2344 * seems to have a byteorder bug that breaks this negotiation. 2345 * In order to interoperate with existing implementations, 2346 * assume that the Enrollee supports everything we do. 2347 */ 2348 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee " 2349 "does not advertise supported encryption types " 2350 "correctly"); 2351 wps->encr_type = wps->wps->encr_types; 2352#else /* WPS_WORKAROUNDS */ 2353 return -1; 2354#endif /* WPS_WORKAROUNDS */ 2355 } 2356 2357 return 0; 2358} 2359 2360 2361static int wps_process_conn_type_flags(struct wps_data *wps, const u8 *conn) 2362{ 2363 if (conn == NULL) { 2364 wpa_printf(MSG_DEBUG, "WPS: No Connection Type flags " 2365 "received"); 2366 return -1; 2367 } 2368 2369 wpa_printf(MSG_DEBUG, "WPS: Enrollee Connection Type flags 0x%x", 2370 *conn); 2371 2372 return 0; 2373} 2374 2375 2376static int wps_process_config_methods(struct wps_data *wps, const u8 *methods) 2377{ 2378 u16 m; 2379 2380 if (methods == NULL) { 2381 wpa_printf(MSG_DEBUG, "WPS: No Config Methods received"); 2382 return -1; 2383 } 2384 2385 m = WPA_GET_BE16(methods); 2386 2387 wpa_printf(MSG_DEBUG, "WPS: Enrollee Config Methods 0x%x" 2388 "%s%s%s%s%s%s%s%s%s", m, 2389 m & WPS_CONFIG_USBA ? " [USBA]" : "", 2390 m & WPS_CONFIG_ETHERNET ? " [Ethernet]" : "", 2391 m & WPS_CONFIG_LABEL ? " [Label]" : "", 2392 m & WPS_CONFIG_DISPLAY ? " [Display]" : "", 2393 m & WPS_CONFIG_EXT_NFC_TOKEN ? " [Ext NFC Token]" : "", 2394 m & WPS_CONFIG_INT_NFC_TOKEN ? " [Int NFC Token]" : "", 2395 m & WPS_CONFIG_NFC_INTERFACE ? " [NFC]" : "", 2396 m & WPS_CONFIG_PUSHBUTTON ? " [PBC]" : "", 2397 m & WPS_CONFIG_KEYPAD ? " [Keypad]" : ""); 2398 2399 if (!(m & WPS_CONFIG_DISPLAY) && !wps->use_psk_key) { 2400 /* 2401 * The Enrollee does not have a display so it is unlikely to be 2402 * able to show the passphrase to a user and as such, could 2403 * benefit from receiving PSK to reduce key derivation time. 2404 */ 2405 wpa_printf(MSG_DEBUG, "WPS: Prefer PSK format key due to " 2406 "Enrollee not supporting display"); 2407 wps->use_psk_key = 1; 2408 } 2409 2410 return 0; 2411} 2412 2413 2414static int wps_process_wps_state(struct wps_data *wps, const u8 *state) 2415{ 2416 if (state == NULL) { 2417 wpa_printf(MSG_DEBUG, "WPS: No Wi-Fi Protected Setup State " 2418 "received"); 2419 return -1; 2420 } 2421 2422 wpa_printf(MSG_DEBUG, "WPS: Enrollee Wi-Fi Protected Setup State %d", 2423 *state); 2424 2425 return 0; 2426} 2427 2428 2429static int wps_process_assoc_state(struct wps_data *wps, const u8 *assoc) 2430{ 2431 u16 a; 2432 2433 if (assoc == NULL) { 2434 wpa_printf(MSG_DEBUG, "WPS: No Association State received"); 2435 return -1; 2436 } 2437 2438 a = WPA_GET_BE16(assoc); 2439 wpa_printf(MSG_DEBUG, "WPS: Enrollee Association State %d", a); 2440 2441 return 0; 2442} 2443 2444 2445static int wps_process_config_error(struct wps_data *wps, const u8 *err) 2446{ 2447 u16 e; 2448 2449 if (err == NULL) { 2450 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error received"); 2451 return -1; 2452 } 2453 2454 e = WPA_GET_BE16(err); 2455 wpa_printf(MSG_DEBUG, "WPS: Enrollee Configuration Error %d", e); 2456 2457 return 0; 2458} 2459 2460 2461static int wps_registrar_p2p_dev_addr_match(struct wps_data *wps) 2462{ 2463#ifdef CONFIG_P2P 2464 struct wps_registrar *reg = wps->wps->registrar; 2465 2466 if (is_zero_ether_addr(reg->p2p_dev_addr)) 2467 return 1; /* no filtering in use */ 2468 2469 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) != 0) { 2470 wpa_printf(MSG_DEBUG, "WPS: No match on P2P Device Address " 2471 "filtering for PBC: expected " MACSTR " was " 2472 MACSTR " - indicate PBC session overlap", 2473 MAC2STR(reg->p2p_dev_addr), 2474 MAC2STR(wps->p2p_dev_addr)); 2475 return 0; 2476 } 2477#endif /* CONFIG_P2P */ 2478 return 1; 2479} 2480 2481 2482static int wps_registrar_skip_overlap(struct wps_data *wps) 2483{ 2484#ifdef CONFIG_P2P 2485 struct wps_registrar *reg = wps->wps->registrar; 2486 2487 if (is_zero_ether_addr(reg->p2p_dev_addr)) 2488 return 0; /* no specific Enrollee selected */ 2489 2490 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) == 0) { 2491 wpa_printf(MSG_DEBUG, "WPS: Skip PBC overlap due to selected " 2492 "Enrollee match"); 2493 return 1; 2494 } 2495#endif /* CONFIG_P2P */ 2496 return 0; 2497} 2498 2499 2500static enum wps_process_res wps_process_m1(struct wps_data *wps, 2501 struct wps_parse_attr *attr) 2502{ 2503 wpa_printf(MSG_DEBUG, "WPS: Received M1"); 2504 2505 if (wps->state != RECV_M1) { 2506 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2507 "receiving M1", wps->state); 2508 return WPS_FAILURE; 2509 } 2510 2511 if (wps_process_uuid_e(wps, attr->uuid_e) || 2512 wps_process_mac_addr(wps, attr->mac_addr) || 2513 wps_process_enrollee_nonce(wps, attr->enrollee_nonce) || 2514 wps_process_pubkey(wps, attr->public_key, attr->public_key_len) || 2515 wps_process_auth_type_flags(wps, attr->auth_type_flags) || 2516 wps_process_encr_type_flags(wps, attr->encr_type_flags) || 2517 wps_process_conn_type_flags(wps, attr->conn_type_flags) || 2518 wps_process_config_methods(wps, attr->config_methods) || 2519 wps_process_wps_state(wps, attr->wps_state) || 2520 wps_process_device_attrs(&wps->peer_dev, attr) || 2521 wps_process_rf_bands(&wps->peer_dev, attr->rf_bands) || 2522 wps_process_assoc_state(wps, attr->assoc_state) || 2523 wps_process_dev_password_id(wps, attr->dev_password_id) || 2524 wps_process_config_error(wps, attr->config_error) || 2525 wps_process_os_version(&wps->peer_dev, attr->os_version)) 2526 return WPS_FAILURE; 2527 2528 if (wps->dev_pw_id < 0x10 && 2529 wps->dev_pw_id != DEV_PW_DEFAULT && 2530 wps->dev_pw_id != DEV_PW_USER_SPECIFIED && 2531 wps->dev_pw_id != DEV_PW_MACHINE_SPECIFIED && 2532 wps->dev_pw_id != DEV_PW_REGISTRAR_SPECIFIED && 2533 (wps->dev_pw_id != DEV_PW_PUSHBUTTON || 2534 !wps->wps->registrar->pbc)) { 2535 wpa_printf(MSG_DEBUG, "WPS: Unsupported Device Password ID %d", 2536 wps->dev_pw_id); 2537 wps->state = SEND_M2D; 2538 return WPS_CONTINUE; 2539 } 2540 2541#ifdef CONFIG_WPS_NFC 2542 if (wps->dev_pw_id >= 0x10) { 2543 struct wps_nfc_pw_token *token; 2544 const u8 *addr[1]; 2545 u8 hash[WPS_HASH_LEN]; 2546 2547 token = wps_get_nfc_pw_token( 2548 &wps->wps->registrar->nfc_pw_tokens, wps->dev_pw_id); 2549 if (token) { 2550 wpa_printf(MSG_DEBUG, "WPS: Found matching NFC " 2551 "Password Token"); 2552 dl_list_del(&token->list); 2553 wps->nfc_pw_token = token; 2554 2555 addr[0] = attr->public_key; 2556 sha256_vector(1, addr, &attr->public_key_len, hash); 2557 if (os_memcmp(hash, wps->nfc_pw_token->pubkey_hash, 2558 WPS_OOB_PUBKEY_HASH_LEN) != 0) { 2559 wpa_printf(MSG_ERROR, "WPS: Public Key hash " 2560 "mismatch"); 2561 return WPS_FAILURE; 2562 } 2563 } 2564 } 2565#endif /* CONFIG_WPS_NFC */ 2566 2567 if (wps->dev_pw_id == DEV_PW_PUSHBUTTON) { 2568 if ((wps->wps->registrar->force_pbc_overlap || 2569 wps_registrar_pbc_overlap(wps->wps->registrar, 2570 wps->mac_addr_e, wps->uuid_e) || 2571 !wps_registrar_p2p_dev_addr_match(wps)) && 2572 !wps_registrar_skip_overlap(wps)) { 2573 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - deny PBC " 2574 "negotiation"); 2575 wps->state = SEND_M2D; 2576 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2577 wps_pbc_overlap_event(wps->wps); 2578 wps_fail_event(wps->wps, WPS_M1, 2579 WPS_CFG_MULTIPLE_PBC_DETECTED, 2580 WPS_EI_NO_ERROR); 2581 wps->wps->registrar->force_pbc_overlap = 1; 2582 return WPS_CONTINUE; 2583 } 2584 wps_registrar_add_pbc_session(wps->wps->registrar, 2585 wps->mac_addr_e, wps->uuid_e); 2586 wps->pbc = 1; 2587 } 2588 2589#ifdef WPS_WORKAROUNDS 2590 /* 2591 * It looks like Mac OS X 10.6.3 and 10.6.4 do not like Network Key in 2592 * passphrase format. To avoid interop issues, force PSK format to be 2593 * used. 2594 */ 2595 if (!wps->use_psk_key && 2596 wps->peer_dev.manufacturer && 2597 os_strncmp(wps->peer_dev.manufacturer, "Apple ", 6) == 0 && 2598 wps->peer_dev.model_name && 2599 os_strcmp(wps->peer_dev.model_name, "AirPort") == 0) { 2600 wpa_printf(MSG_DEBUG, "WPS: Workaround - Force Network Key in " 2601 "PSK format"); 2602 wps->use_psk_key = 1; 2603 } 2604#endif /* WPS_WORKAROUNDS */ 2605 2606 wps->state = SEND_M2; 2607 return WPS_CONTINUE; 2608} 2609 2610 2611static enum wps_process_res wps_process_m3(struct wps_data *wps, 2612 const struct wpabuf *msg, 2613 struct wps_parse_attr *attr) 2614{ 2615 wpa_printf(MSG_DEBUG, "WPS: Received M3"); 2616 2617 if (wps->state != RECV_M3) { 2618 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2619 "receiving M3", wps->state); 2620 wps->state = SEND_WSC_NACK; 2621 return WPS_CONTINUE; 2622 } 2623 2624 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2625 !wps_registrar_skip_overlap(wps)) { 2626 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2627 "session overlap"); 2628 wps->state = SEND_WSC_NACK; 2629 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2630 return WPS_CONTINUE; 2631 } 2632 2633 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2634 wps_process_authenticator(wps, attr->authenticator, msg) || 2635 wps_process_e_hash1(wps, attr->e_hash1) || 2636 wps_process_e_hash2(wps, attr->e_hash2)) { 2637 wps->state = SEND_WSC_NACK; 2638 return WPS_CONTINUE; 2639 } 2640 2641 wps->state = SEND_M4; 2642 return WPS_CONTINUE; 2643} 2644 2645 2646static enum wps_process_res wps_process_m5(struct wps_data *wps, 2647 const struct wpabuf *msg, 2648 struct wps_parse_attr *attr) 2649{ 2650 struct wpabuf *decrypted; 2651 struct wps_parse_attr eattr; 2652 2653 wpa_printf(MSG_DEBUG, "WPS: Received M5"); 2654 2655 if (wps->state != RECV_M5) { 2656 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2657 "receiving M5", wps->state); 2658 wps->state = SEND_WSC_NACK; 2659 return WPS_CONTINUE; 2660 } 2661 2662 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2663 !wps_registrar_skip_overlap(wps)) { 2664 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2665 "session overlap"); 2666 wps->state = SEND_WSC_NACK; 2667 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2668 return WPS_CONTINUE; 2669 } 2670 2671 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2672 wps_process_authenticator(wps, attr->authenticator, msg)) { 2673 wps->state = SEND_WSC_NACK; 2674 return WPS_CONTINUE; 2675 } 2676 2677 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings, 2678 attr->encr_settings_len); 2679 if (decrypted == NULL) { 2680 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted " 2681 "Settings attribute"); 2682 wps->state = SEND_WSC_NACK; 2683 return WPS_CONTINUE; 2684 } 2685 2686 if (wps_validate_m5_encr(decrypted, attr->version2 != NULL) < 0) { 2687 wpabuf_free(decrypted); 2688 wps->state = SEND_WSC_NACK; 2689 return WPS_CONTINUE; 2690 } 2691 2692 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings " 2693 "attribute"); 2694 if (wps_parse_msg(decrypted, &eattr) < 0 || 2695 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) || 2696 wps_process_e_snonce1(wps, eattr.e_snonce1)) { 2697 wpabuf_free(decrypted); 2698 wps->state = SEND_WSC_NACK; 2699 return WPS_CONTINUE; 2700 } 2701 wpabuf_free(decrypted); 2702 2703 wps->state = SEND_M6; 2704 return WPS_CONTINUE; 2705} 2706 2707 2708static void wps_sta_cred_cb(struct wps_data *wps) 2709{ 2710 /* 2711 * Update credential to only include a single authentication and 2712 * encryption type in case the AP configuration includes more than one 2713 * option. 2714 */ 2715 if (wps->cred.auth_type & WPS_AUTH_WPA2PSK) 2716 wps->cred.auth_type = WPS_AUTH_WPA2PSK; 2717 else if (wps->cred.auth_type & WPS_AUTH_WPAPSK) 2718 wps->cred.auth_type = WPS_AUTH_WPAPSK; 2719 if (wps->cred.encr_type & WPS_ENCR_AES) 2720 wps->cred.encr_type = WPS_ENCR_AES; 2721 else if (wps->cred.encr_type & WPS_ENCR_TKIP) 2722 wps->cred.encr_type = WPS_ENCR_TKIP; 2723 wpa_printf(MSG_DEBUG, "WPS: Update local configuration based on the " 2724 "AP configuration"); 2725 if (wps->wps->cred_cb) 2726 wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred); 2727} 2728 2729 2730static void wps_cred_update(struct wps_credential *dst, 2731 struct wps_credential *src) 2732{ 2733 os_memcpy(dst->ssid, src->ssid, sizeof(dst->ssid)); 2734 dst->ssid_len = src->ssid_len; 2735 dst->auth_type = src->auth_type; 2736 dst->encr_type = src->encr_type; 2737 dst->key_idx = src->key_idx; 2738 os_memcpy(dst->key, src->key, sizeof(dst->key)); 2739 dst->key_len = src->key_len; 2740} 2741 2742 2743static int wps_process_ap_settings_r(struct wps_data *wps, 2744 struct wps_parse_attr *attr) 2745{ 2746 struct wpabuf *msg; 2747 2748 if (wps->wps->ap || wps->er) 2749 return 0; 2750 2751 /* AP Settings Attributes in M7 when Enrollee is an AP */ 2752 if (wps_process_ap_settings(attr, &wps->cred) < 0) 2753 return -1; 2754 2755 wpa_printf(MSG_INFO, "WPS: Received old AP configuration from AP"); 2756 2757 if (wps->new_ap_settings) { 2758 wpa_printf(MSG_INFO, "WPS: Update AP configuration based on " 2759 "new settings"); 2760 wps_cred_update(&wps->cred, wps->new_ap_settings); 2761 return 0; 2762 } else { 2763 /* 2764 * Use the AP PIN only to receive the current AP settings, not 2765 * to reconfigure the AP. 2766 */ 2767 2768 /* 2769 * Clear selected registrar here since we do not get to 2770 * WSC_Done in this protocol run. 2771 */ 2772 wps_registrar_pin_completed(wps->wps->registrar); 2773 2774 msg = wps_build_ap_cred(wps); 2775 if (msg == NULL) 2776 return -1; 2777 wps->cred.cred_attr = wpabuf_head(msg); 2778 wps->cred.cred_attr_len = wpabuf_len(msg); 2779 2780 if (wps->ap_settings_cb) { 2781 wps->ap_settings_cb(wps->ap_settings_cb_ctx, 2782 &wps->cred); 2783 wpabuf_free(msg); 2784 return 1; 2785 } 2786 wps_sta_cred_cb(wps); 2787 2788 wps->cred.cred_attr = NULL; 2789 wps->cred.cred_attr_len = 0; 2790 wpabuf_free(msg); 2791 2792 return 1; 2793 } 2794} 2795 2796 2797static enum wps_process_res wps_process_m7(struct wps_data *wps, 2798 const struct wpabuf *msg, 2799 struct wps_parse_attr *attr) 2800{ 2801 struct wpabuf *decrypted; 2802 struct wps_parse_attr eattr; 2803 2804 wpa_printf(MSG_DEBUG, "WPS: Received M7"); 2805 2806 if (wps->state != RECV_M7) { 2807 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 2808 "receiving M7", wps->state); 2809 wps->state = SEND_WSC_NACK; 2810 return WPS_CONTINUE; 2811 } 2812 2813 if (wps->pbc && wps->wps->registrar->force_pbc_overlap && 2814 !wps_registrar_skip_overlap(wps)) { 2815 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC " 2816 "session overlap"); 2817 wps->state = SEND_WSC_NACK; 2818 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED; 2819 return WPS_CONTINUE; 2820 } 2821 2822 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) || 2823 wps_process_authenticator(wps, attr->authenticator, msg)) { 2824 wps->state = SEND_WSC_NACK; 2825 return WPS_CONTINUE; 2826 } 2827 2828 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings, 2829 attr->encr_settings_len); 2830 if (decrypted == NULL) { 2831 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypt Encrypted " 2832 "Settings attribute"); 2833 wps->state = SEND_WSC_NACK; 2834 return WPS_CONTINUE; 2835 } 2836 2837 if (wps_validate_m7_encr(decrypted, wps->wps->ap || wps->er, 2838 attr->version2 != NULL) < 0) { 2839 wpabuf_free(decrypted); 2840 wps->state = SEND_WSC_NACK; 2841 return WPS_CONTINUE; 2842 } 2843 2844 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings " 2845 "attribute"); 2846 if (wps_parse_msg(decrypted, &eattr) < 0 || 2847 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) || 2848 wps_process_e_snonce2(wps, eattr.e_snonce2) || 2849 wps_process_ap_settings_r(wps, &eattr)) { 2850 wpabuf_free(decrypted); 2851 wps->state = SEND_WSC_NACK; 2852 return WPS_CONTINUE; 2853 } 2854 2855 wpabuf_free(decrypted); 2856 2857 wps->state = SEND_M8; 2858 return WPS_CONTINUE; 2859} 2860 2861 2862static enum wps_process_res wps_process_wsc_msg(struct wps_data *wps, 2863 const struct wpabuf *msg) 2864{ 2865 struct wps_parse_attr attr; 2866 enum wps_process_res ret = WPS_CONTINUE; 2867 2868 wpa_printf(MSG_DEBUG, "WPS: Received WSC_MSG"); 2869 2870 if (wps_parse_msg(msg, &attr) < 0) 2871 return WPS_FAILURE; 2872 2873 if (attr.msg_type == NULL) { 2874 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 2875 wps->state = SEND_WSC_NACK; 2876 return WPS_CONTINUE; 2877 } 2878 2879 if (*attr.msg_type != WPS_M1 && 2880 (attr.registrar_nonce == NULL || 2881 os_memcmp(wps->nonce_r, attr.registrar_nonce, 2882 WPS_NONCE_LEN) != 0)) { 2883 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 2884 return WPS_FAILURE; 2885 } 2886 2887 switch (*attr.msg_type) { 2888 case WPS_M1: 2889 if (wps_validate_m1(msg) < 0) 2890 return WPS_FAILURE; 2891#ifdef CONFIG_WPS_UPNP 2892 if (wps->wps->wps_upnp && attr.mac_addr) { 2893 /* Remove old pending messages when starting new run */ 2894 wps_free_pending_msgs(wps->wps->upnp_msgs); 2895 wps->wps->upnp_msgs = NULL; 2896 2897 upnp_wps_device_send_wlan_event( 2898 wps->wps->wps_upnp, attr.mac_addr, 2899 UPNP_WPS_WLANEVENT_TYPE_EAP, msg); 2900 } 2901#endif /* CONFIG_WPS_UPNP */ 2902 ret = wps_process_m1(wps, &attr); 2903 break; 2904 case WPS_M3: 2905 if (wps_validate_m3(msg) < 0) 2906 return WPS_FAILURE; 2907 ret = wps_process_m3(wps, msg, &attr); 2908 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 2909 wps_fail_event(wps->wps, WPS_M3, wps->config_error, 2910 wps->error_indication); 2911 break; 2912 case WPS_M5: 2913 if (wps_validate_m5(msg) < 0) 2914 return WPS_FAILURE; 2915 ret = wps_process_m5(wps, msg, &attr); 2916 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 2917 wps_fail_event(wps->wps, WPS_M5, wps->config_error, 2918 wps->error_indication); 2919 break; 2920 case WPS_M7: 2921 if (wps_validate_m7(msg) < 0) 2922 return WPS_FAILURE; 2923 ret = wps_process_m7(wps, msg, &attr); 2924 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK) 2925 wps_fail_event(wps->wps, WPS_M7, wps->config_error, 2926 wps->error_indication); 2927 break; 2928 default: 2929 wpa_printf(MSG_DEBUG, "WPS: Unsupported Message Type %d", 2930 *attr.msg_type); 2931 return WPS_FAILURE; 2932 } 2933 2934 if (ret == WPS_CONTINUE) { 2935 /* Save a copy of the last message for Authenticator derivation 2936 */ 2937 wpabuf_free(wps->last_msg); 2938 wps->last_msg = wpabuf_dup(msg); 2939 } 2940 2941 return ret; 2942} 2943 2944 2945static enum wps_process_res wps_process_wsc_ack(struct wps_data *wps, 2946 const struct wpabuf *msg) 2947{ 2948 struct wps_parse_attr attr; 2949 2950 wpa_printf(MSG_DEBUG, "WPS: Received WSC_ACK"); 2951 2952 if (wps_parse_msg(msg, &attr) < 0) 2953 return WPS_FAILURE; 2954 2955 if (attr.msg_type == NULL) { 2956 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 2957 return WPS_FAILURE; 2958 } 2959 2960 if (*attr.msg_type != WPS_WSC_ACK) { 2961 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 2962 *attr.msg_type); 2963 return WPS_FAILURE; 2964 } 2965 2966#ifdef CONFIG_WPS_UPNP 2967 if (wps->wps->wps_upnp && wps->ext_reg && wps->state == RECV_M2D_ACK && 2968 upnp_wps_subscribers(wps->wps->wps_upnp)) { 2969 if (wps->wps->upnp_msgs) 2970 return WPS_CONTINUE; 2971 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an " 2972 "external Registrar"); 2973 return WPS_PENDING; 2974 } 2975#endif /* CONFIG_WPS_UPNP */ 2976 2977 if (attr.registrar_nonce == NULL || 2978 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 2979 { 2980 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 2981 return WPS_FAILURE; 2982 } 2983 2984 if (attr.enrollee_nonce == NULL || 2985 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 2986 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 2987 return WPS_FAILURE; 2988 } 2989 2990 if (wps->state == RECV_M2D_ACK) { 2991#ifdef CONFIG_WPS_UPNP 2992 if (wps->wps->wps_upnp && 2993 upnp_wps_subscribers(wps->wps->wps_upnp)) { 2994 if (wps->wps->upnp_msgs) 2995 return WPS_CONTINUE; 2996 if (wps->ext_reg == 0) 2997 wps->ext_reg = 1; 2998 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an " 2999 "external Registrar"); 3000 return WPS_PENDING; 3001 } 3002#endif /* CONFIG_WPS_UPNP */ 3003 3004 wpa_printf(MSG_DEBUG, "WPS: No more registrars available - " 3005 "terminate negotiation"); 3006 } 3007 3008 return WPS_FAILURE; 3009} 3010 3011 3012static enum wps_process_res wps_process_wsc_nack(struct wps_data *wps, 3013 const struct wpabuf *msg) 3014{ 3015 struct wps_parse_attr attr; 3016 int old_state; 3017 u16 config_error; 3018 3019 wpa_printf(MSG_DEBUG, "WPS: Received WSC_NACK"); 3020 3021 old_state = wps->state; 3022 wps->state = SEND_WSC_NACK; 3023 3024 if (wps_parse_msg(msg, &attr) < 0) 3025 return WPS_FAILURE; 3026 3027 if (attr.msg_type == NULL) { 3028 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3029 return WPS_FAILURE; 3030 } 3031 3032 if (*attr.msg_type != WPS_WSC_NACK) { 3033 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 3034 *attr.msg_type); 3035 return WPS_FAILURE; 3036 } 3037 3038#ifdef CONFIG_WPS_UPNP 3039 if (wps->wps->wps_upnp && wps->ext_reg) { 3040 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external " 3041 "Registrar terminated by the Enrollee"); 3042 return WPS_FAILURE; 3043 } 3044#endif /* CONFIG_WPS_UPNP */ 3045 3046 if (attr.registrar_nonce == NULL || 3047 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 3048 { 3049 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3050 return WPS_FAILURE; 3051 } 3052 3053 if (attr.enrollee_nonce == NULL || 3054 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 3055 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 3056 return WPS_FAILURE; 3057 } 3058 3059 if (attr.config_error == NULL) { 3060 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error attribute " 3061 "in WSC_NACK"); 3062 return WPS_FAILURE; 3063 } 3064 3065 config_error = WPA_GET_BE16(attr.config_error); 3066 wpa_printf(MSG_DEBUG, "WPS: Enrollee terminated negotiation with " 3067 "Configuration Error %d", config_error); 3068 3069 switch (old_state) { 3070 case RECV_M3: 3071 wps_fail_event(wps->wps, WPS_M2, config_error, 3072 wps->error_indication); 3073 break; 3074 case RECV_M5: 3075 wps_fail_event(wps->wps, WPS_M4, config_error, 3076 wps->error_indication); 3077 break; 3078 case RECV_M7: 3079 wps_fail_event(wps->wps, WPS_M6, config_error, 3080 wps->error_indication); 3081 break; 3082 case RECV_DONE: 3083 wps_fail_event(wps->wps, WPS_M8, config_error, 3084 wps->error_indication); 3085 break; 3086 default: 3087 break; 3088 } 3089 3090 return WPS_FAILURE; 3091} 3092 3093 3094static enum wps_process_res wps_process_wsc_done(struct wps_data *wps, 3095 const struct wpabuf *msg) 3096{ 3097 struct wps_parse_attr attr; 3098 3099 wpa_printf(MSG_DEBUG, "WPS: Received WSC_Done"); 3100 3101 if (wps->state != RECV_DONE && 3102 (!wps->wps->wps_upnp || !wps->ext_reg)) { 3103 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for " 3104 "receiving WSC_Done", wps->state); 3105 return WPS_FAILURE; 3106 } 3107 3108 if (wps_parse_msg(msg, &attr) < 0) 3109 return WPS_FAILURE; 3110 3111 if (attr.msg_type == NULL) { 3112 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute"); 3113 return WPS_FAILURE; 3114 } 3115 3116 if (*attr.msg_type != WPS_WSC_DONE) { 3117 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d", 3118 *attr.msg_type); 3119 return WPS_FAILURE; 3120 } 3121 3122#ifdef CONFIG_WPS_UPNP 3123 if (wps->wps->wps_upnp && wps->ext_reg) { 3124 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external " 3125 "Registrar completed successfully"); 3126 wps_device_store(wps->wps->registrar, &wps->peer_dev, 3127 wps->uuid_e); 3128 return WPS_DONE; 3129 } 3130#endif /* CONFIG_WPS_UPNP */ 3131 3132 if (attr.registrar_nonce == NULL || 3133 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0) 3134 { 3135 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce"); 3136 return WPS_FAILURE; 3137 } 3138 3139 if (attr.enrollee_nonce == NULL || 3140 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) { 3141 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce"); 3142 return WPS_FAILURE; 3143 } 3144 3145 wpa_printf(MSG_DEBUG, "WPS: Negotiation completed successfully"); 3146 wps_device_store(wps->wps->registrar, &wps->peer_dev, 3147 wps->uuid_e); 3148 3149 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->new_psk && 3150 wps->wps->ap && !wps->wps->registrar->disable_auto_conf) { 3151 struct wps_credential cred; 3152 3153 wpa_printf(MSG_DEBUG, "WPS: Moving to Configured state based " 3154 "on first Enrollee connection"); 3155 3156 os_memset(&cred, 0, sizeof(cred)); 3157 os_memcpy(cred.ssid, wps->wps->ssid, wps->wps->ssid_len); 3158 cred.ssid_len = wps->wps->ssid_len; 3159 cred.auth_type = WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK; 3160 cred.encr_type = WPS_ENCR_TKIP | WPS_ENCR_AES; 3161 os_memcpy(cred.key, wps->new_psk, wps->new_psk_len); 3162 cred.key_len = wps->new_psk_len; 3163 3164 wps->wps->wps_state = WPS_STATE_CONFIGURED; 3165 wpa_hexdump_ascii_key(MSG_DEBUG, 3166 "WPS: Generated random passphrase", 3167 wps->new_psk, wps->new_psk_len); 3168 if (wps->wps->cred_cb) 3169 wps->wps->cred_cb(wps->wps->cb_ctx, &cred); 3170 3171 os_free(wps->new_psk); 3172 wps->new_psk = NULL; 3173 } 3174 3175 if (!wps->wps->ap && !wps->er) 3176 wps_sta_cred_cb(wps); 3177 3178 if (wps->new_psk) { 3179 if (wps_cb_new_psk(wps->wps->registrar, wps->mac_addr_e, 3180 wps->new_psk, wps->new_psk_len)) { 3181 wpa_printf(MSG_DEBUG, "WPS: Failed to configure the " 3182 "new PSK"); 3183 } 3184 os_free(wps->new_psk); 3185 wps->new_psk = NULL; 3186 } 3187 3188 wps_cb_reg_success(wps->wps->registrar, wps->mac_addr_e, wps->uuid_e, 3189 wps->dev_password, wps->dev_password_len); 3190 3191 if (wps->pbc) { 3192 wps_registrar_remove_pbc_session(wps->wps->registrar, 3193 wps->uuid_e, 3194 wps->p2p_dev_addr); 3195 wps_registrar_pbc_completed(wps->wps->registrar); 3196 os_get_time(&wps->wps->registrar->pbc_ignore_start); 3197 os_memcpy(wps->wps->registrar->pbc_ignore_uuid, wps->uuid_e, 3198 WPS_UUID_LEN); 3199 } else { 3200 wps_registrar_pin_completed(wps->wps->registrar); 3201 } 3202 /* TODO: maintain AuthorizedMACs somewhere separately for each ER and 3203 * merge them into APs own list.. */ 3204 3205 wps_success_event(wps->wps); 3206 3207 return WPS_DONE; 3208} 3209 3210 3211enum wps_process_res wps_registrar_process_msg(struct wps_data *wps, 3212 enum wsc_op_code op_code, 3213 const struct wpabuf *msg) 3214{ 3215 enum wps_process_res ret; 3216 3217 wpa_printf(MSG_DEBUG, "WPS: Processing received message (len=%lu " 3218 "op_code=%d)", 3219 (unsigned long) wpabuf_len(msg), op_code); 3220 3221#ifdef CONFIG_WPS_UPNP 3222 if (wps->wps->wps_upnp && op_code == WSC_MSG && wps->ext_reg == 1) { 3223 struct wps_parse_attr attr; 3224 if (wps_parse_msg(msg, &attr) == 0 && attr.msg_type && 3225 *attr.msg_type == WPS_M3) 3226 wps->ext_reg = 2; /* past M2/M2D phase */ 3227 } 3228 if (wps->ext_reg > 1) 3229 wps_registrar_free_pending_m2(wps->wps); 3230 if (wps->wps->wps_upnp && wps->ext_reg && 3231 wps->wps->upnp_msgs == NULL && 3232 (op_code == WSC_MSG || op_code == WSC_Done || op_code == WSC_NACK)) 3233 { 3234 struct wps_parse_attr attr; 3235 int type; 3236 if (wps_parse_msg(msg, &attr) < 0 || attr.msg_type == NULL) 3237 type = -1; 3238 else 3239 type = *attr.msg_type; 3240 wpa_printf(MSG_DEBUG, "WPS: Sending received message (type %d)" 3241 " to external Registrar for processing", type); 3242 upnp_wps_device_send_wlan_event(wps->wps->wps_upnp, 3243 wps->mac_addr_e, 3244 UPNP_WPS_WLANEVENT_TYPE_EAP, 3245 msg); 3246 if (op_code == WSC_MSG) 3247 return WPS_PENDING; 3248 } else if (wps->wps->wps_upnp && wps->ext_reg && op_code == WSC_MSG) { 3249 wpa_printf(MSG_DEBUG, "WPS: Skip internal processing - using " 3250 "external Registrar"); 3251 return WPS_CONTINUE; 3252 } 3253#endif /* CONFIG_WPS_UPNP */ 3254 3255 switch (op_code) { 3256 case WSC_MSG: 3257 return wps_process_wsc_msg(wps, msg); 3258 case WSC_ACK: 3259 if (wps_validate_wsc_ack(msg) < 0) 3260 return WPS_FAILURE; 3261 return wps_process_wsc_ack(wps, msg); 3262 case WSC_NACK: 3263 if (wps_validate_wsc_nack(msg) < 0) 3264 return WPS_FAILURE; 3265 return wps_process_wsc_nack(wps, msg); 3266 case WSC_Done: 3267 if (wps_validate_wsc_done(msg) < 0) 3268 return WPS_FAILURE; 3269 ret = wps_process_wsc_done(wps, msg); 3270 if (ret == WPS_FAILURE) { 3271 wps->state = SEND_WSC_NACK; 3272 wps_fail_event(wps->wps, WPS_WSC_DONE, 3273 wps->config_error, 3274 wps->error_indication); 3275 } 3276 return ret; 3277 default: 3278 wpa_printf(MSG_DEBUG, "WPS: Unsupported op_code %d", op_code); 3279 return WPS_FAILURE; 3280 } 3281} 3282 3283 3284int wps_registrar_update_ie(struct wps_registrar *reg) 3285{ 3286 return wps_set_ie(reg); 3287} 3288 3289 3290static void wps_registrar_set_selected_timeout(void *eloop_ctx, 3291 void *timeout_ctx) 3292{ 3293 struct wps_registrar *reg = eloop_ctx; 3294 3295 wpa_printf(MSG_DEBUG, "WPS: Selected Registrar timeout - " 3296 "unselect internal Registrar"); 3297 reg->selected_registrar = 0; 3298 reg->pbc = 0; 3299 wps_registrar_selected_registrar_changed(reg); 3300} 3301 3302 3303#ifdef CONFIG_WPS_UPNP 3304static void wps_registrar_sel_reg_add(struct wps_registrar *reg, 3305 struct subscription *s) 3306{ 3307 int i, j; 3308 wpa_printf(MSG_DEBUG, "WPS: External Registrar selected (dev_pw_id=%d " 3309 "config_methods=0x%x)", 3310 s->dev_password_id, s->config_methods); 3311 reg->sel_reg_union = 1; 3312 if (reg->sel_reg_dev_password_id_override != DEV_PW_PUSHBUTTON) 3313 reg->sel_reg_dev_password_id_override = s->dev_password_id; 3314 if (reg->sel_reg_config_methods_override == -1) 3315 reg->sel_reg_config_methods_override = 0; 3316 reg->sel_reg_config_methods_override |= s->config_methods; 3317 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) 3318 if (is_zero_ether_addr(reg->authorized_macs_union[i])) 3319 break; 3320 for (j = 0; i < WPS_MAX_AUTHORIZED_MACS && j < WPS_MAX_AUTHORIZED_MACS; 3321 j++) { 3322 if (is_zero_ether_addr(s->authorized_macs[j])) 3323 break; 3324 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC into union: " 3325 MACSTR, MAC2STR(s->authorized_macs[j])); 3326 os_memcpy(reg->authorized_macs_union[i], 3327 s->authorized_macs[j], ETH_ALEN); 3328 i++; 3329 } 3330 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union", 3331 (u8 *) reg->authorized_macs_union, 3332 sizeof(reg->authorized_macs_union)); 3333} 3334#endif /* CONFIG_WPS_UPNP */ 3335 3336 3337static void wps_registrar_sel_reg_union(struct wps_registrar *reg) 3338{ 3339#ifdef CONFIG_WPS_UPNP 3340 struct subscription *s; 3341 3342 if (reg->wps->wps_upnp == NULL) 3343 return; 3344 3345 dl_list_for_each(s, ®->wps->wps_upnp->subscriptions, 3346 struct subscription, list) { 3347 struct subscr_addr *sa; 3348 sa = dl_list_first(&s->addr_list, struct subscr_addr, list); 3349 if (sa) { 3350 wpa_printf(MSG_DEBUG, "WPS: External Registrar %s:%d", 3351 inet_ntoa(sa->saddr.sin_addr), 3352 ntohs(sa->saddr.sin_port)); 3353 } 3354 if (s->selected_registrar) 3355 wps_registrar_sel_reg_add(reg, s); 3356 else 3357 wpa_printf(MSG_DEBUG, "WPS: External Registrar not " 3358 "selected"); 3359 } 3360#endif /* CONFIG_WPS_UPNP */ 3361} 3362 3363 3364/** 3365 * wps_registrar_selected_registrar_changed - SetSelectedRegistrar change 3366 * @reg: Registrar data from wps_registrar_init() 3367 * 3368 * This function is called when selected registrar state changes, e.g., when an 3369 * AP receives a SetSelectedRegistrar UPnP message. 3370 */ 3371void wps_registrar_selected_registrar_changed(struct wps_registrar *reg) 3372{ 3373 wpa_printf(MSG_DEBUG, "WPS: Selected registrar information changed"); 3374 3375 reg->sel_reg_union = reg->selected_registrar; 3376 reg->sel_reg_dev_password_id_override = -1; 3377 reg->sel_reg_config_methods_override = -1; 3378 os_memcpy(reg->authorized_macs_union, reg->authorized_macs, 3379 WPS_MAX_AUTHORIZED_MACS * ETH_ALEN); 3380 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union (start with own)", 3381 (u8 *) reg->authorized_macs_union, 3382 sizeof(reg->authorized_macs_union)); 3383 if (reg->selected_registrar) { 3384 u16 methods; 3385 3386 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON; 3387#ifdef CONFIG_WPS2 3388 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON | 3389 WPS_CONFIG_PHY_PUSHBUTTON); 3390#endif /* CONFIG_WPS2 */ 3391 if (reg->pbc) { 3392 reg->sel_reg_dev_password_id_override = 3393 DEV_PW_PUSHBUTTON; 3394 wps_set_pushbutton(&methods, reg->wps->config_methods); 3395 } 3396 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar selected " 3397 "(pbc=%d)", reg->pbc); 3398 reg->sel_reg_config_methods_override = methods; 3399 } else 3400 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar not selected"); 3401 3402 wps_registrar_sel_reg_union(reg); 3403 3404 wps_set_ie(reg); 3405 wps_cb_set_sel_reg(reg); 3406} 3407 3408 3409int wps_registrar_get_info(struct wps_registrar *reg, const u8 *addr, 3410 char *buf, size_t buflen) 3411{ 3412 struct wps_registrar_device *d; 3413 int len = 0, ret; 3414 char uuid[40]; 3415 char devtype[WPS_DEV_TYPE_BUFSIZE]; 3416 3417 d = wps_device_get(reg, addr); 3418 if (d == NULL) 3419 return 0; 3420 if (uuid_bin2str(d->uuid, uuid, sizeof(uuid))) 3421 return 0; 3422 3423 ret = os_snprintf(buf + len, buflen - len, 3424 "wpsUuid=%s\n" 3425 "wpsPrimaryDeviceType=%s\n" 3426 "wpsDeviceName=%s\n" 3427 "wpsManufacturer=%s\n" 3428 "wpsModelName=%s\n" 3429 "wpsModelNumber=%s\n" 3430 "wpsSerialNumber=%s\n", 3431 uuid, 3432 wps_dev_type_bin2str(d->dev.pri_dev_type, devtype, 3433 sizeof(devtype)), 3434 d->dev.device_name ? d->dev.device_name : "", 3435 d->dev.manufacturer ? d->dev.manufacturer : "", 3436 d->dev.model_name ? d->dev.model_name : "", 3437 d->dev.model_number ? d->dev.model_number : "", 3438 d->dev.serial_number ? d->dev.serial_number : ""); 3439 if (ret < 0 || (size_t) ret >= buflen - len) 3440 return len; 3441 len += ret; 3442 3443 return len; 3444} 3445 3446 3447int wps_registrar_config_ap(struct wps_registrar *reg, 3448 struct wps_credential *cred) 3449{ 3450#ifdef CONFIG_WPS2 3451 printf("encr_type=0x%x\n", cred->encr_type); 3452 if (!(cred->encr_type & (WPS_ENCR_NONE | WPS_ENCR_TKIP | 3453 WPS_ENCR_AES))) { 3454 if (cred->encr_type & WPS_ENCR_WEP) { 3455 wpa_printf(MSG_INFO, "WPS: Reject new AP settings " 3456 "due to WEP configuration"); 3457 return -1; 3458 } 3459 3460 wpa_printf(MSG_INFO, "WPS: Reject new AP settings due to " 3461 "invalid encr_type 0x%x", cred->encr_type); 3462 return -1; 3463 } 3464 3465 if ((cred->encr_type & (WPS_ENCR_TKIP | WPS_ENCR_AES)) == 3466 WPS_ENCR_TKIP) { 3467 wpa_printf(MSG_DEBUG, "WPS: Upgrade encr_type TKIP -> " 3468 "TKIP+AES"); 3469 cred->encr_type |= WPS_ENCR_AES; 3470 } 3471 3472 if ((cred->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) == 3473 WPS_AUTH_WPAPSK) { 3474 wpa_printf(MSG_DEBUG, "WPS: Upgrade auth_type WPAPSK -> " 3475 "WPAPSK+WPA2PSK"); 3476 cred->auth_type |= WPS_AUTH_WPA2PSK; 3477 } 3478#endif /* CONFIG_WPS2 */ 3479 3480 if (reg->wps->cred_cb) 3481 return reg->wps->cred_cb(reg->wps->cb_ctx, cred); 3482 3483 return -1; 3484} 3485 3486 3487#ifdef CONFIG_WPS_NFC 3488 3489int wps_registrar_add_nfc_pw_token(struct wps_registrar *reg, 3490 const u8 *pubkey_hash, u16 pw_id, 3491 const u8 *dev_pw, size_t dev_pw_len) 3492{ 3493 struct wps_nfc_pw_token *token; 3494 3495 if (dev_pw_len > WPS_OOB_DEVICE_PASSWORD_LEN) 3496 return -1; 3497 3498 wps_free_nfc_pw_tokens(®->nfc_pw_tokens, pw_id); 3499 3500 token = os_zalloc(sizeof(*token)); 3501 if (token == NULL) 3502 return -1; 3503 3504 os_memcpy(token->pubkey_hash, pubkey_hash, WPS_OOB_PUBKEY_HASH_LEN); 3505 token->pw_id = pw_id; 3506 os_memcpy(token->dev_pw, dev_pw, dev_pw_len); 3507 token->dev_pw_len = dev_pw_len; 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); 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 return 0; 3522} 3523 3524 3525int wps_registrar_add_nfc_password_token(struct wps_registrar *reg, 3526 const u8 *oob_dev_pw, 3527 size_t oob_dev_pw_len) 3528{ 3529 const u8 *pos, *hash, *dev_pw; 3530 u16 id; 3531 size_t dev_pw_len; 3532 3533 if (oob_dev_pw_len < WPS_OOB_PUBKEY_HASH_LEN + 2 + 3534 WPS_OOB_DEVICE_PASSWORD_MIN_LEN || 3535 oob_dev_pw_len > WPS_OOB_PUBKEY_HASH_LEN + 2 + 3536 WPS_OOB_DEVICE_PASSWORD_LEN) 3537 return -1; 3538 3539 hash = oob_dev_pw; 3540 pos = oob_dev_pw + WPS_OOB_PUBKEY_HASH_LEN; 3541 id = WPA_GET_BE16(pos); 3542 dev_pw = pos + 2; 3543 dev_pw_len = oob_dev_pw + oob_dev_pw_len - dev_pw; 3544 3545 wpa_printf(MSG_DEBUG, "WPS: Add NFC Password Token for Password ID %u", 3546 id); 3547 3548 wpa_hexdump(MSG_DEBUG, "WPS: Public Key Hash", 3549 hash, WPS_OOB_PUBKEY_HASH_LEN); 3550 wpa_hexdump_key(MSG_DEBUG, "WPS: Device Password", dev_pw, dev_pw_len); 3551 3552 return wps_registrar_add_nfc_pw_token(reg, hash, id, dev_pw, 3553 dev_pw_len); 3554} 3555 3556 3557void wps_registrar_remove_nfc_pw_token(struct wps_registrar *reg, 3558 struct wps_nfc_pw_token *token) 3559{ 3560 wps_registrar_remove_authorized_mac(reg, 3561 (u8 *) "\xff\xff\xff\xff\xff\xff"); 3562 wps_registrar_selected_registrar_changed(reg); 3563} 3564 3565#endif /* CONFIG_WPS_NFC */ 3566